From f8f5d7ca517217e5fbaef8de0d2a1eb8356959d0 Mon Sep 17 00:00:00 2001
From: Igor Rudenko <iostream64@gmail.com>
Date: Sun, 13 Oct 2024 22:14:26 +0300
Subject: [PATCH] Add jdk.internal.* to std libs

---
 .../std/jdk/internal/ValueBased.class         |  Bin 0 -> 384 bytes
 .../std/jdk/internal/ValueBased.java          |   49 +
 .../jdk/internal/access/JavaAWTAccess.class   |  Bin 0 -> 177 bytes
 .../jdk/internal/access/JavaAWTAccess.java    |   36 +
 .../internal/access/JavaAWTFontAccess.class   |  Bin 0 -> 255 bytes
 .../internal/access/JavaAWTFontAccess.java    |   39 +
 .../jdk/internal/access/JavaBeansAccess.class |  Bin 0 -> 519 bytes
 .../jdk/internal/access/JavaBeansAccess.java  |   50 +
 .../jdk/internal/access/JavaIOAccess.class    |  Bin 0 -> 165 bytes
 .../std/jdk/internal/access/JavaIOAccess.java |   32 +
 .../access/JavaIOFileDescriptorAccess.class   |  Bin 0 -> 776 bytes
 .../access/JavaIOFileDescriptorAccess.java    |   49 +
 .../access/JavaIOFilePermissionAccess.class   |  Bin 0 -> 265 bytes
 .../access/JavaIOFilePermissionAccess.java    |   48 +
 .../access/JavaIOPrintStreamAccess.class      |  Bin 0 -> 206 bytes
 .../access/JavaIOPrintStreamAccess.java       |   31 +
 .../access/JavaIOPrintWriterAccess.class      |  Bin 0 -> 206 bytes
 .../access/JavaIOPrintWriterAccess.java       |   31 +
 .../access/JavaIORandomAccessFileAccess.class |  Bin 0 -> 292 bytes
 .../access/JavaIORandomAccessFileAccess.java  |   35 +
 .../jdk/internal/access/JavaLangAccess.class  |  Bin 0 -> 8769 bytes
 .../jdk/internal/access/JavaLangAccess.java   |  618 +++
 .../access/JavaLangInvokeAccess.class         |  Bin 0 -> 2941 bytes
 .../internal/access/JavaLangInvokeAccess.java |  173 +
 .../access/JavaLangModuleAccess.class         |  Bin 0 -> 4439 bytes
 .../internal/access/JavaLangModuleAccess.java |  140 +
 .../internal/access/JavaLangRefAccess.class   |  Bin 0 -> 443 bytes
 .../internal/access/JavaLangRefAccess.java    |   60 +
 .../access/JavaLangReflectAccess.class        |  Bin 0 -> 2753 bytes
 .../access/JavaLangReflectAccess.java         |  108 +
 .../access/JavaNetHttpCookieAccess.class      |  Bin 0 -> 345 bytes
 .../access/JavaNetHttpCookieAccess.java       |   44 +
 .../access/JavaNetInetAddressAccess.class     |  Bin 0 -> 329 bytes
 .../access/JavaNetInetAddressAccess.java      |   48 +
 .../internal/access/JavaNetURLAccess.class    |  Bin 0 -> 200 bytes
 .../jdk/internal/access/JavaNetURLAccess.java |   32 +
 .../internal/access/JavaNetUriAccess.class    |  Bin 0 -> 205 bytes
 .../jdk/internal/access/JavaNetUriAccess.java |   35 +
 .../jdk/internal/access/JavaNioAccess.class   |  Bin 0 -> 1277 bytes
 .../jdk/internal/access/JavaNioAccess.java    |  144 +
 .../access/JavaObjectInputFilterAccess.class  |  Bin 0 -> 229 bytes
 .../access/JavaObjectInputFilterAccess.java   |   38 +
 .../access/JavaObjectInputStreamAccess.class  |  Bin 0 -> 433 bytes
 .../access/JavaObjectInputStreamAccess.java   |   38 +
 .../JavaObjectInputStreamReadString.class     |  Bin 0 -> 356 bytes
 .../JavaObjectInputStreamReadString.java      |   38 +
 ...SecurityAccess$ProtectionDomainCache.class |  Bin 0 -> 452 bytes
 .../internal/access/JavaSecurityAccess.class  |  Bin 0 -> 1016 bytes
 .../internal/access/JavaSecurityAccess.java   |   53 +
 .../access/JavaSecurityPropertiesAccess.class |  Bin 0 -> 215 bytes
 .../access/JavaSecurityPropertiesAccess.java  |   32 +
 .../access/JavaSecuritySignatureAccess.class  |  Bin 0 -> 678 bytes
 .../access/JavaSecuritySignatureAccess.java   |   43 +
 .../access/JavaSecuritySpecAccess.class       |  Bin 0 -> 216 bytes
 .../access/JavaSecuritySpecAccess.java        |   32 +
 .../access/JavaUtilCollectionAccess.class     |  Bin 0 -> 358 bytes
 .../access/JavaUtilCollectionAccess.java      |   33 +
 .../access/JavaUtilConcurrentFJPAccess.class  |  Bin 0 -> 300 bytes
 .../access/JavaUtilConcurrentFJPAccess.java   |   32 +
 .../access/JavaUtilConcurrentTLRAccess.class  |  Bin 0 -> 206 bytes
 .../access/JavaUtilConcurrentTLRAccess.java   |   30 +
 .../internal/access/JavaUtilJarAccess.class   |  Bin 0 -> 535 bytes
 .../internal/access/JavaUtilJarAccess.java    |   40 +
 .../access/JavaUtilResourceBundleAccess.class |  Bin 0 -> 728 bytes
 .../access/JavaUtilResourceBundleAccess.java  |   66 +
 .../access/JavaUtilZipFileAccess.class        |  Bin 0 -> 1099 bytes
 .../access/JavaUtilZipFileAccess.java         |   48 +
 .../JavaxCryptoSealedObjectAccess.class       |  Bin 0 -> 407 bytes
 .../access/JavaxCryptoSealedObjectAccess.java |   38 +
 .../access/JavaxCryptoSpecAccess.class        |  Bin 0 -> 211 bytes
 .../access/JavaxCryptoSpecAccess.java         |   32 +
 .../internal/access/JavaxSecurityAccess.class |  Bin 0 -> 332 bytes
 .../internal/access/JavaxSecurityAccess.java  |   34 +
 .../jdk/internal/access/SharedSecrets.class   |  Bin 0 -> 17671 bytes
 .../jdk/internal/access/SharedSecrets.java    |  539 ++
 .../access/foreign/UnmapperProxy.class        |  Bin 0 -> 258 bytes
 .../access/foreign/UnmapperProxy.java         |   40 +
 ...ributeMapper$AnnotationDefaultMapper.class |  Bin 0 -> 2792 bytes
 ...tributeMapper$BootstrapMethodsMapper.class |  Bin 0 -> 2755 bytes
 ...buteMapper$CharacterRangeTableMapper.class |  Bin 0 -> 3542 bytes
 .../AbstractAttributeMapper$CodeMapper.class  |  Bin 0 -> 2547 bytes
 ...tAttributeMapper$CompilationIDMapper.class |  Bin 0 -> 2776 bytes
 ...tAttributeMapper$ConstantValueMapper.class |  Bin 0 -> 2780 bytes
 ...ractAttributeMapper$DeprecatedMapper.class |  Bin 0 -> 2548 bytes
 ...ttributeMapper$EnclosingMethodMapper.class |  Bin 0 -> 3037 bytes
 ...ractAttributeMapper$ExceptionsMapper.class |  Bin 0 -> 2690 bytes
 ...ctAttributeMapper$InnerClassesMapper.class |  Bin 0 -> 3671 bytes
 ...ttributeMapper$LineNumberTableMapper.class |  Bin 0 -> 3312 bytes
 ...ibuteMapper$LocalVariableTableMapper.class |  Bin 0 -> 3614 bytes
 ...eMapper$LocalVariableTypeTableMapper.class |  Bin 0 -> 3675 bytes
 ...tributeMapper$MethodParametersMapper.class |  Bin 0 -> 3586 bytes
 ...ctAttributeMapper$ModuleHashesMapper.class |  Bin 0 -> 3540 bytes
 ...ttributeMapper$ModuleMainClassMapper.class |  Bin 0 -> 2795 bytes
 ...AbstractAttributeMapper$ModuleMapper.class |  Bin 0 -> 4723 bytes
 ...AttributeMapper$ModulePackagesMapper.class |  Bin 0 -> 2732 bytes
 ...tributeMapper$ModuleResolutionMapper.class |  Bin 0 -> 2724 bytes
 ...ctAttributeMapper$ModuleTargetMapper.class |  Bin 0 -> 2766 bytes
 ...stractAttributeMapper$NestHostMapper.class |  Bin 0 -> 2706 bytes
 ...actAttributeMapper$NestMembersMapper.class |  Bin 0 -> 2702 bytes
 ...buteMapper$PermittedSubclassesMapper.class |  Bin 0 -> 2798 bytes
 ...AbstractAttributeMapper$RecordMapper.class |  Bin 0 -> 3439 bytes
 ...er$RuntimeInvisibleAnnotationsMapper.class |  Bin 0 -> 2843 bytes
 ...eInvisibleParameterAnnotationsMapper.class |  Bin 0 -> 3512 bytes
 ...untimeInvisibleTypeAnnotationsMapper.class |  Bin 0 -> 2956 bytes
 ...pper$RuntimeVisibleAnnotationsMapper.class |  Bin 0 -> 2821 bytes
 ...imeVisibleParameterAnnotationsMapper.class |  Bin 0 -> 3490 bytes
 ...$RuntimeVisibleTypeAnnotationsMapper.class |  Bin 0 -> 2934 bytes
 ...tractAttributeMapper$SignatureMapper.class |  Bin 0 -> 2716 bytes
 ...uteMapper$SourceDebugExtensionMapper.class |  Bin 0 -> 2766 bytes
 ...ractAttributeMapper$SourceFileMapper.class |  Bin 0 -> 2727 bytes
 ...stractAttributeMapper$SourceIDMapper.class |  Bin 0 -> 2716 bytes
 ...tAttributeMapper$StackMapTableMapper.class |  Bin 0 -> 2839 bytes
 ...tractAttributeMapper$SyntheticMapper.class |  Bin 0 -> 2537 bytes
 .../impl/AbstractAttributeMapper.class        |  Bin 0 -> 7321 bytes
 .../impl/AbstractAttributeMapper.java         |  824 +++
 .../impl/AbstractBoundLocalVariable.class     |  Bin 0 -> 3109 bytes
 .../impl/AbstractBoundLocalVariable.java      |  104 +
 .../impl/AbstractDirectBuilder.class          |  Bin 0 -> 2364 bytes
 .../classfile/impl/AbstractDirectBuilder.java |   59 +
 .../classfile/impl/AbstractElement.class      |  Bin 0 -> 1112 bytes
 .../classfile/impl/AbstractElement.java       |   45 +
 ...ion$BoundArgumentConstantInstruction.class |  Bin 0 -> 2140 bytes
 ...ctInstruction$BoundBranchInstruction.class |  Bin 0 -> 2214 bytes
 ...actInstruction$BoundFieldInstruction.class |  Bin 0 -> 2816 bytes
 ...nstruction$BoundIncrementInstruction.class |  Bin 0 -> 1965 bytes
 ...AbstractInstruction$BoundInstruction.class |  Bin 0 -> 3836 bytes
 ...uction$BoundInvokeDynamicInstruction.class |  Bin 0 -> 2640 bytes
 ...ctInstruction$BoundInvokeInstruction.class |  Bin 0 -> 3053 bytes
 ...tion$BoundInvokeInterfaceInstruction.class |  Bin 0 -> 3092 bytes
 ...tractInstruction$BoundJsrInstruction.class |  Bin 0 -> 2317 bytes
 ...ruction$BoundLoadConstantInstruction.class |  Bin 0 -> 2821 bytes
 ...ractInstruction$BoundLoadInstruction.class |  Bin 0 -> 2318 bytes
 ...ruction$BoundLookupSwitchInstruction.class |  Bin 0 -> 3465 bytes
 ...dNewMultidimensionalArrayInstruction.class |  Bin 0 -> 2631 bytes
 ...nstruction$BoundNewObjectInstruction.class |  Bin 0 -> 2439 bytes
 ...on$BoundNewPrimitiveArrayInstruction.class |  Bin 0 -> 1794 bytes
 ...on$BoundNewReferenceArrayInstruction.class |  Bin 0 -> 2400 bytes
 ...tractInstruction$BoundRetInstruction.class |  Bin 0 -> 2197 bytes
 ...actInstruction$BoundStoreInstruction.class |  Bin 0 -> 2320 bytes
 ...truction$BoundTableSwitchInstruction.class |  Bin 0 -> 4062 bytes
 ...nstruction$BoundTypeCheckInstruction.class |  Bin 0 -> 2501 bytes
 .../AbstractInstruction$SwitchCaseImpl.class  |  Bin 0 -> 1902 bytes
 ...n$UnboundArgumentConstantInstruction.class |  Bin 0 -> 1879 bytes
 ...truction$UnboundArrayLoadInstruction.class |  Bin 0 -> 925 bytes
 ...ruction$UnboundArrayStoreInstruction.class |  Bin 0 -> 929 bytes
 ...Instruction$UnboundBranchInstruction.class |  Bin 0 -> 1554 bytes
 ...nstruction$UnboundConvertInstruction.class |  Bin 0 -> 1020 bytes
 ...tInstruction$UnboundFieldInstruction.class |  Bin 0 -> 1980 bytes
 ...truction$UnboundIncrementInstruction.class |  Bin 0 -> 1822 bytes
 ...stractInstruction$UnboundInstruction.class |  Bin 0 -> 4721 bytes
 ...$UnboundIntrinsicConstantInstruction.class |  Bin 0 -> 1335 bytes
 ...tion$UnboundInvokeDynamicInstruction.class |  Bin 0 -> 1854 bytes
 ...Instruction$UnboundInvokeInstruction.class |  Bin 0 -> 2918 bytes
 ...actInstruction$UnboundJsrInstruction.class |  Bin 0 -> 1658 bytes
 ...ction$UnboundLoadConstantInstruction.class |  Bin 0 -> 2016 bytes
 ...ctInstruction$UnboundLoadInstruction.class |  Bin 0 -> 1733 bytes
 ...ction$UnboundLookupSwitchInstruction.class |  Bin 0 -> 2156 bytes
 ...nstruction$UnboundMonitorInstruction.class |  Bin 0 -> 737 bytes
 ...dNewMultidimensionalArrayInstruction.class |  Bin 0 -> 2095 bytes
 ...truction$UnboundNewObjectInstruction.class |  Bin 0 -> 1739 bytes
 ...$UnboundNewPrimitiveArrayInstruction.class |  Bin 0 -> 1730 bytes
 ...$UnboundNewReferenceArrayInstruction.class |  Bin 0 -> 1802 bytes
 ...actInstruction$UnboundNopInstruction.class |  Bin 0 -> 762 bytes
 ...struction$UnboundOperatorInstruction.class |  Bin 0 -> 921 bytes
 ...actInstruction$UnboundRetInstruction.class |  Bin 0 -> 1580 bytes
 ...Instruction$UnboundReturnInstruction.class |  Bin 0 -> 1214 bytes
 ...tInstruction$UnboundStackInstruction.class |  Bin 0 -> 729 bytes
 ...tInstruction$UnboundStoreInstruction.class |  Bin 0 -> 1738 bytes
 ...uction$UnboundTableSwitchInstruction.class |  Bin 0 -> 2391 bytes
 ...tInstruction$UnboundThrowInstruction.class |  Bin 0 -> 1073 bytes
 ...truction$UnboundTypeCheckInstruction.class |  Bin 0 -> 1743 bytes
 .../classfile/impl/AbstractInstruction.class  |  Bin 0 -> 8205 bytes
 .../classfile/impl/AbstractInstruction.java   | 1453 +++++
 ...try$AbstractDynamicConstantPoolEntry.class |  Bin 0 -> 3598 bytes
 ...ractPoolEntry$AbstractMemberRefEntry.class |  Bin 0 -> 3844 bytes
 ...AbstractPoolEntry$AbstractNamedEntry.class |  Bin 0 -> 2237 bytes
 .../AbstractPoolEntry$AbstractRefEntry.class  |  Bin 0 -> 2417 bytes
 .../AbstractPoolEntry$AbstractRefsEntry.class |  Bin 0 -> 2633 bytes
 .../AbstractPoolEntry$ClassEntryImpl.class    |  Bin 0 -> 3347 bytes
 ...ctPoolEntry$ConstantDynamicEntryImpl.class |  Bin 0 -> 3160 bytes
 .../impl/AbstractPoolEntry$CpException.class  |  Bin 0 -> 603 bytes
 .../AbstractPoolEntry$DoubleEntryImpl.class   |  Bin 0 -> 2838 bytes
 .../AbstractPoolEntry$FieldRefEntryImpl.class |  Bin 0 -> 2535 bytes
 .../AbstractPoolEntry$FloatEntryImpl.class    |  Bin 0 -> 2824 bytes
 .../AbstractPoolEntry$IntegerEntryImpl.class  |  Bin 0 -> 2826 bytes
 ...oolEntry$InterfaceMethodRefEntryImpl.class |  Bin 0 -> 2605 bytes
 ...ractPoolEntry$InvokeDynamicEntryImpl.class |  Bin 0 -> 3146 bytes
 .../AbstractPoolEntry$LongEntryImpl.class     |  Bin 0 -> 2811 bytes
 ...tractPoolEntry$MethodHandleEntryImpl.class |  Bin 0 -> 4758 bytes
 ...AbstractPoolEntry$MethodRefEntryImpl.class |  Bin 0 -> 2542 bytes
 ...bstractPoolEntry$MethodTypeEntryImpl.class |  Bin 0 -> 3363 bytes
 .../AbstractPoolEntry$ModuleEntryImpl.class   |  Bin 0 -> 3032 bytes
 ...stractPoolEntry$NameAndTypeEntryImpl.class |  Bin 0 -> 4176 bytes
 .../AbstractPoolEntry$PackageEntryImpl.class  |  Bin 0 -> 3111 bytes
 .../AbstractPoolEntry$PrimitiveEntry.class    |  Bin 0 -> 2241 bytes
 .../AbstractPoolEntry$StringEntryImpl.class   |  Bin 0 -> 3453 bytes
 ...bstractPoolEntry$Utf8EntryImpl$State.class |  Bin 0 -> 1602 bytes
 .../AbstractPoolEntry$Utf8EntryImpl.class     |  Bin 0 -> 8511 bytes
 .../classfile/impl/AbstractPoolEntry.class    |  Bin 0 -> 5219 bytes
 .../classfile/impl/AbstractPoolEntry.java     | 1201 +++++
 ...seudoInstruction$AbstractLocalPseudo.class |  Bin 0 -> 2576 bytes
 ...PseudoInstruction$ExceptionCatchImpl.class |  Bin 0 -> 3091 bytes
 ...udoInstruction$UnboundCharacterRange.class |  Bin 0 -> 1603 bytes
 ...eudoInstruction$UnboundLocalVariable.class |  Bin 0 -> 2489 bytes
 ...Instruction$UnboundLocalVariableType.class |  Bin 0 -> 2521 bytes
 .../impl/AbstractPseudoInstruction.class      |  Bin 0 -> 1149 bytes
 .../impl/AbstractPseudoInstruction.java       |  260 +
 .../classfile/impl/AbstractUnboundModel.class |  Bin 0 -> 3542 bytes
 .../classfile/impl/AbstractUnboundModel.java  |   71 +
 .../classfile/impl/AccessFlagsImpl.class      |  Bin 0 -> 3067 bytes
 .../classfile/impl/AccessFlagsImpl.java       |   90 +
 ...AnnotationImpl$AnnotationElementImpl.class |  Bin 0 -> 2418 bytes
 .../AnnotationImpl$OfAnnotationImpl.class     |  Bin 0 -> 2228 bytes
 .../impl/AnnotationImpl$OfArrayImpl.class     |  Bin 0 -> 2471 bytes
 .../impl/AnnotationImpl$OfBooleanImpl.class   |  Bin 0 -> 2371 bytes
 .../impl/AnnotationImpl$OfByteImpl.class      |  Bin 0 -> 2309 bytes
 .../impl/AnnotationImpl$OfCharacterImpl.class |  Bin 0 -> 2343 bytes
 .../impl/AnnotationImpl$OfClassImpl.class     |  Bin 0 -> 2250 bytes
 .../impl/AnnotationImpl$OfConstantImpl.class  |  Bin 0 -> 1931 bytes
 .../impl/AnnotationImpl$OfDoubleImpl.class    |  Bin 0 -> 2311 bytes
 .../impl/AnnotationImpl$OfEnumImpl.class      |  Bin 0 -> 2450 bytes
 .../impl/AnnotationImpl$OfFloatImpl.class     |  Bin 0 -> 2298 bytes
 .../impl/AnnotationImpl$OfIntegerImpl.class   |  Bin 0 -> 2314 bytes
 .../impl/AnnotationImpl$OfLongImpl.class      |  Bin 0 -> 2285 bytes
 .../impl/AnnotationImpl$OfShortImpl.class     |  Bin 0 -> 2318 bytes
 .../impl/AnnotationImpl$OfStringImpl.class    |  Bin 0 -> 2297 bytes
 .../classfile/impl/AnnotationImpl.class       |  Bin 0 -> 4042 bytes
 .../classfile/impl/AnnotationImpl.java        |  304 ++
 .../classfile/impl/AnnotationReader.class     |  Bin 0 -> 15123 bytes
 .../classfile/impl/AnnotationReader.java      |  282 +
 .../classfile/impl/AttributeHolder.class      |  Bin 0 -> 3213 bytes
 .../classfile/impl/AttributeHolder.java       |   69 +
 .../classfile/impl/BlockCodeBuilderImpl.class |  Bin 0 -> 4018 bytes
 .../classfile/impl/BlockCodeBuilderImpl.java  |  118 +
 .../impl/BootstrapMethodEntryImpl.class       |  Bin 0 -> 3300 bytes
 .../impl/BootstrapMethodEntryImpl.java        |   95 +
 .../classfile/impl/BoundAttribute$1.class     |  Bin 0 -> 2788 bytes
 ...Attribute$BoundAnnotationDefaultAttr.class |  Bin 0 -> 1728 bytes
 ...ibute$BoundBootstrapMethodsAttribute.class |  Bin 0 -> 3109 bytes
 ...te$BoundCharacterRangeTableAttribute.class |  Bin 0 -> 2468 bytes
 .../BoundAttribute$BoundCodeAttribute.class   |  Bin 0 -> 2410 bytes
 ...ttribute$BoundCompilationIDAttribute.class |  Bin 0 -> 1565 bytes
 ...ttribute$BoundConstantValueAttribute.class |  Bin 0 -> 1644 bytes
 ...ndAttribute$BoundDeprecatedAttribute.class |  Bin 0 -> 1186 bytes
 ...ribute$BoundEnclosingMethodAttribute.class |  Bin 0 -> 2032 bytes
 ...ndAttribute$BoundExceptionsAttribute.class |  Bin 0 -> 1602 bytes
 ...Attribute$BoundInnerClassesAttribute.class |  Bin 0 -> 2819 bytes
 ...ribute$BoundLineNumberTableAttribute.class |  Bin 0 -> 2253 bytes
 ...ute$BoundLocalVariableTableAttribute.class |  Bin 0 -> 2576 bytes
 ...BoundLocalVariableTypeTableAttribute.class |  Bin 0 -> 2628 bytes
 ...ibute$BoundMethodParametersAttribute.class |  Bin 0 -> 2543 bytes
 .../BoundAttribute$BoundModuleAttribute.class |  Bin 0 -> 6219 bytes
 ...Attribute$BoundModuleHashesAttribute.class |  Bin 0 -> 2621 bytes
 ...ribute$BoundModuleMainClassAttribute.class |  Bin 0 -> 1580 bytes
 ...tribute$BoundModulePackagesAttribute.class |  Bin 0 -> 1636 bytes
 ...ibute$BoundModuleResolutionAttribute.class |  Bin 0 -> 1498 bytes
 ...Attribute$BoundModuleTargetAttribute.class |  Bin 0 -> 1558 bytes
 ...oundAttribute$BoundNestHostAttribute.class |  Bin 0 -> 1523 bytes
 ...dAttribute$BoundNestMembersAttribute.class |  Bin 0 -> 1621 bytes
 ...te$BoundPermittedSubclassesAttribute.class |  Bin 0 -> 1683 bytes
 .../BoundAttribute$BoundRecordAttribute.class |  Bin 0 -> 2185 bytes
 ...RuntimeInvisibleAnnotationsAttribute.class |  Bin 0 -> 1662 bytes
 ...visibleParameterAnnotationsAttribute.class |  Bin 0 -> 1826 bytes
 ...imeInvisibleTypeAnnotationsAttribute.class |  Bin 0 -> 2384 bytes
 ...ndRuntimeVisibleAnnotationsAttribute.class |  Bin 0 -> 1648 bytes
 ...VisibleParameterAnnotationsAttribute.class |  Bin 0 -> 1810 bytes
 ...ntimeVisibleTypeAnnotationsAttribute.class |  Bin 0 -> 2368 bytes
 ...undAttribute$BoundSignatureAttribute.class |  Bin 0 -> 1529 bytes
 ...e$BoundSourceDebugExtensionAttribute.class |  Bin 0 -> 1266 bytes
 ...ndAttribute$BoundSourceFileAttribute.class |  Bin 0 -> 1538 bytes
 ...oundAttribute$BoundSourceIDAttribute.class |  Bin 0 -> 1520 bytes
 ...ttribute$BoundStackMapTableAttribute.class |  Bin 0 -> 2490 bytes
 ...undAttribute$BoundSyntheticAttribute.class |  Bin 0 -> 1178 bytes
 ...BoundAttribute$BoundUnknownAttribute.class |  Bin 0 -> 1162 bytes
 .../classfile/impl/BoundAttribute.class       |  Bin 0 -> 15612 bytes
 .../classfile/impl/BoundAttribute.java        | 1066 ++++
 .../classfile/impl/BoundCharacterRange.class  |  Bin 0 -> 2350 bytes
 .../classfile/impl/BoundCharacterRange.java   |   86 +
 .../classfile/impl/BoundLocalVariable.class   |  Bin 0 -> 1804 bytes
 .../classfile/impl/BoundLocalVariable.java    |   61 +
 .../impl/BoundLocalVariableType.class         |  Bin 0 -> 1617 bytes
 .../impl/BoundLocalVariableType.java          |   54 +
 .../impl/BoundRecordComponentInfo.class       |  Bin 0 -> 1555 bytes
 .../impl/BoundRecordComponentInfo.java        |   64 +
 .../classfile/impl/BufWriterImpl.class        |  Bin 0 -> 6886 bytes
 .../classfile/impl/BufWriterImpl.java         |  217 +
 .../impl/BufferedCodeBuilder$Model$1.class    |  Bin 0 -> 1338 bytes
 .../impl/BufferedCodeBuilder$Model.class      |  Bin 0 -> 5918 bytes
 .../classfile/impl/BufferedCodeBuilder.class  |  Bin 0 -> 5627 bytes
 .../classfile/impl/BufferedCodeBuilder.java   |  218 +
 .../impl/BufferedFieldBuilder$Model$1.class   |  Bin 0 -> 1491 bytes
 .../impl/BufferedFieldBuilder$Model.class     |  Bin 0 -> 3679 bytes
 .../classfile/impl/BufferedFieldBuilder.class |  Bin 0 -> 3265 bytes
 .../classfile/impl/BufferedFieldBuilder.java  |  135 +
 .../impl/BufferedMethodBuilder$Model$1.class  |  Bin 0 -> 1359 bytes
 .../impl/BufferedMethodBuilder$Model.class    |  Bin 0 -> 4853 bytes
 .../impl/BufferedMethodBuilder.class          |  Bin 0 -> 5968 bytes
 .../classfile/impl/BufferedMethodBuilder.java |  221 +
 .../classfile/impl/BytecodeHelpers$1.class    |  Bin 0 -> 2412 bytes
 .../classfile/impl/BytecodeHelpers.class      |  Bin 0 -> 15510 bytes
 .../classfile/impl/BytecodeHelpers.java       |  350 ++
 .../classfile/impl/CatchBuilderImpl.class     |  Bin 0 -> 4893 bytes
 .../classfile/impl/CatchBuilderImpl.java      |  111 +
 .../classfile/impl/ChainedClassBuilder.class  |  Bin 0 -> 6243 bytes
 .../classfile/impl/ChainedClassBuilder.java   |  102 +
 .../classfile/impl/ChainedCodeBuilder.class   |  Bin 0 -> 1935 bytes
 .../classfile/impl/ChainedCodeBuilder.java    |   65 +
 .../classfile/impl/ChainedFieldBuilder.class  |  Bin 0 -> 2603 bytes
 .../classfile/impl/ChainedFieldBuilder.java   |   65 +
 .../classfile/impl/ChainedMethodBuilder.class |  Bin 0 -> 3842 bytes
 .../classfile/impl/ChainedMethodBuilder.java  |   83 +
 .../classfile/impl/ClassFileImpl$1.class      |  Bin 0 -> 1144 bytes
 .../classfile/impl/ClassFileImpl$2.class      |  Bin 0 -> 1751 bytes
 ...ssFileImpl$AttributeMapperOptionImpl.class |  Bin 0 -> 2317 bytes
 ...mpl$ClassHierarchyResolverOptionImpl.class |  Bin 0 -> 1979 bytes
 .../classfile/impl/ClassFileImpl.class        |  Bin 0 -> 11519 bytes
 .../classfile/impl/ClassFileImpl.java         |  154 +
 .../classfile/impl/ClassFileVersionImpl.class |  Bin 0 -> 1310 bytes
 .../classfile/impl/ClassFileVersionImpl.java  |   58 +
 ...yImpl$CachedClassHierarchyResolver$1.class |  Bin 0 -> 1969 bytes
 ...chyImpl$CachedClassHierarchyResolver.class |  Bin 0 -> 2407 bytes
 ...HierarchyImpl$ClassHierarchyInfoImpl.class |  Bin 0 -> 2236 bytes
 ...ClassLoadingClassHierarchyResolver$1.class |  Bin 0 -> 1693 bytes
 ...l$ClassLoadingClassHierarchyResolver.class |  Bin 0 -> 2309 bytes
 ...ourceParsingClassHierarchyResolver$1.class |  Bin 0 -> 1657 bytes
 ...esourceParsingClassHierarchyResolver.class |  Bin 0 -> 3692 bytes
 ...chyImpl$StaticClassHierarchyResolver.class |  Bin 0 -> 2889 bytes
 .../classfile/impl/ClassHierarchyImpl.class   |  Bin 0 -> 3875 bytes
 .../classfile/impl/ClassHierarchyImpl.java    |  251 +
 .../internal/classfile/impl/ClassImpl$1.class |  Bin 0 -> 1391 bytes
 .../internal/classfile/impl/ClassImpl.class   |  Bin 0 -> 9049 bytes
 .../internal/classfile/impl/ClassImpl.java    |  224 +
 .../classfile/impl/ClassPrinterImpl$1.class   |  Bin 0 -> 1304 bytes
 .../ClassPrinterImpl$ExceptionHandler.class   |  Bin 0 -> 2042 bytes
 .../impl/ClassPrinterImpl$LeafNodeImpl.class  |  Bin 0 -> 2342 bytes
 .../impl/ClassPrinterImpl$ListNodeImpl.class  |  Bin 0 -> 4066 bytes
 ...Impl$MapNodeImpl$PrivateListNodeImpl.class |  Bin 0 -> 1445 bytes
 .../impl/ClassPrinterImpl$MapNodeImpl.class   |  Bin 0 -> 6224 bytes
 .../impl/ClassPrinterImpl$Style.class         |  Bin 0 -> 1327 bytes
 .../classfile/impl/ClassPrinterImpl.class     |  Bin 0 -> 68936 bytes
 .../classfile/impl/ClassPrinterImpl.java      | 1084 ++++
 .../classfile/impl/ClassReaderImpl.class      |  Bin 0 -> 18596 bytes
 .../classfile/impl/ClassReaderImpl.java       |  516 ++
 .../classfile/impl/ClassRemapperImpl$1.class  |  Bin 0 -> 998 bytes
 .../classfile/impl/ClassRemapperImpl.class    |  Bin 0 -> 40081 bytes
 .../classfile/impl/ClassRemapperImpl.java     |  418 ++
 .../internal/classfile/impl/CodeImpl$1.class  |  Bin 0 -> 1155 bytes
 .../internal/classfile/impl/CodeImpl$2.class  |  Bin 0 -> 1801 bytes
 .../internal/classfile/impl/CodeImpl$3.class  |  Bin 0 -> 1884 bytes
 .../internal/classfile/impl/CodeImpl$4.class  |  Bin 0 -> 1282 bytes
 .../CodeImpl$ExceptionHandlerAction.class     |  Bin 0 -> 292 bytes
 .../internal/classfile/impl/CodeImpl.class    |  Bin 0 -> 25867 bytes
 .../jdk/internal/classfile/impl/CodeImpl.java |  495 ++
 .../impl/CodeLocalsShifterImpl.class          |  Bin 0 -> 4774 bytes
 .../classfile/impl/CodeLocalsShifterImpl.java |   99 +
 .../classfile/impl/CodeRelabelerImpl.class    |  Bin 0 -> 8317 bytes
 .../classfile/impl/CodeRelabelerImpl.java     |  108 +
 .../impl/CodeStackTrackerImpl$1.class         |  Bin 0 -> 1622 bytes
 .../impl/CodeStackTrackerImpl$Item.class      |  Bin 0 -> 1904 bytes
 .../impl/CodeStackTrackerImpl$Stack$1.class   |  Bin 0 -> 1589 bytes
 .../impl/CodeStackTrackerImpl$Stack.class     |  Bin 0 -> 2219 bytes
 .../classfile/impl/CodeStackTrackerImpl.class |  Bin 0 -> 13401 bytes
 .../classfile/impl/CodeStackTrackerImpl.java  |  346 ++
 .../classfile/impl/DirectClassBuilder.class   |  Bin 0 -> 10213 bytes
 .../classfile/impl/DirectClassBuilder.java    |  208 +
 .../classfile/impl/DirectCodeBuilder$1.class  |  Bin 0 -> 2960 bytes
 .../classfile/impl/DirectCodeBuilder$2.class  |  Bin 0 -> 2626 bytes
 .../classfile/impl/DirectCodeBuilder$3.class  |  Bin 0 -> 2658 bytes
 .../classfile/impl/DirectCodeBuilder$4.class  |  Bin 0 -> 5466 bytes
 .../classfile/impl/DirectCodeBuilder$5.class  |  Bin 0 -> 1334 bytes
 .../classfile/impl/DirectCodeBuilder$6.class  |  Bin 0 -> 1312 bytes
 .../classfile/impl/DirectCodeBuilder$7.class  |  Bin 0 -> 1317 bytes
 .../classfile/impl/DirectCodeBuilder$8.class  |  Bin 0 -> 972 bytes
 ...uilder$DedupLineNumberTableAttribute.class |  Bin 0 -> 2583 bytes
 .../DirectCodeBuilder$DeferredLabel.class     |  Bin 0 -> 2091 bytes
 ...ctCodeBuilder$LabelOverflowException.class |  Bin 0 -> 650 bytes
 .../classfile/impl/DirectCodeBuilder.class    |  Bin 0 -> 23400 bytes
 .../classfile/impl/DirectCodeBuilder.java     |  786 +++
 .../classfile/impl/DirectFieldBuilder.class   |  Bin 0 -> 3453 bytes
 .../classfile/impl/DirectFieldBuilder.java    |   83 +
 .../impl/DirectMethodBuilder$1.class          |  Bin 0 -> 1546 bytes
 .../classfile/impl/DirectMethodBuilder.class  |  Bin 0 -> 7273 bytes
 .../classfile/impl/DirectMethodBuilder.java   |  158 +
 .../internal/classfile/impl/EntryMap.class    |  Bin 0 -> 3525 bytes
 .../jdk/internal/classfile/impl/EntryMap.java |  187 +
 .../internal/classfile/impl/FieldImpl$1.class |  Bin 0 -> 1182 bytes
 .../internal/classfile/impl/FieldImpl.class   |  Bin 0 -> 5059 bytes
 .../internal/classfile/impl/FieldImpl.java    |  124 +
 .../classfile/impl/InterfacesImpl.class       |  Bin 0 -> 2797 bytes
 .../classfile/impl/InterfacesImpl.java        |   58 +
 .../classfile/impl/LabelContext.class         |  Bin 0 -> 478 bytes
 .../internal/classfile/impl/LabelContext.java |   35 +
 .../internal/classfile/impl/LabelImpl.class   |  Bin 0 -> 1782 bytes
 .../internal/classfile/impl/LabelImpl.java    |   85 +
 .../classfile/impl/LineNumberImpl.class       |  Bin 0 -> 1588 bytes
 .../classfile/impl/LineNumberImpl.java        |   66 +
 .../classfile/impl/MethodImpl$1.class         |  Bin 0 -> 1192 bytes
 .../internal/classfile/impl/MethodImpl.class  |  Bin 0 -> 7041 bytes
 .../internal/classfile/impl/MethodImpl.java   |  154 +
 .../internal/classfile/impl/MethodInfo.class  |  Bin 0 -> 723 bytes
 .../internal/classfile/impl/MethodInfo.java   |   45 +
 .../impl/ModuleAttributeBuilderImpl.class     |  Bin 0 -> 8025 bytes
 .../impl/ModuleAttributeBuilderImpl.java      |  159 +
 .../impl/NonterminalCodeBuilder.class         |  Bin 0 -> 2243 bytes
 .../impl/NonterminalCodeBuilder.java          |   71 +
 .../classfile/impl/RawBytecodeHelper.class    |  Bin 0 -> 4398 bytes
 .../classfile/impl/RawBytecodeHelper.java     |  171 +
 .../classfile/impl/SignaturesImpl$1.class     |  Bin 0 -> 1080 bytes
 .../SignaturesImpl$ArrayTypeSigImpl.class     |  Bin 0 -> 2406 bytes
 .../impl/SignaturesImpl$BaseTypeSigImpl.class |  Bin 0 -> 1962 bytes
 .../SignaturesImpl$ClassSignatureImpl.class   |  Bin 0 -> 3531 bytes
 .../SignaturesImpl$ClassTypeSigImpl.class     |  Bin 0 -> 5345 bytes
 .../SignaturesImpl$MethodSignatureImpl.class  |  Bin 0 -> 4004 bytes
 .../impl/SignaturesImpl$TypeArgImpl.class     |  Bin 0 -> 2395 bytes
 .../impl/SignaturesImpl$TypeParamImpl.class   |  Bin 0 -> 2736 bytes
 .../impl/SignaturesImpl$TypeVarSigImpl.class  |  Bin 0 -> 1990 bytes
 .../SignaturesImpl$UnboundedTypeArgImpl.class |  Bin 0 -> 1596 bytes
 .../classfile/impl/SignaturesImpl.class       |  Bin 0 -> 10296 bytes
 .../classfile/impl/SignaturesImpl.java        |  374 ++
 .../classfile/impl/SplitConstantPool$1.class  |  Bin 0 -> 1837 bytes
 .../classfile/impl/SplitConstantPool$2.class  |  Bin 0 -> 1163 bytes
 .../classfile/impl/SplitConstantPool$3.class  |  Bin 0 -> 1194 bytes
 .../classfile/impl/SplitConstantPool.class    |  Bin 0 -> 28208 bytes
 .../classfile/impl/SplitConstantPool.java     |  606 +++
 .../classfile/impl/StackCounter$Target.class  |  Bin 0 -> 1653 bytes
 .../classfile/impl/StackCounter.class         |  Bin 0 -> 13079 bytes
 .../internal/classfile/impl/StackCounter.java |  386 ++
 ...coder$ObjectVerificationTypeInfoImpl.class |  Bin 0 -> 1715 bytes
 .../StackMapDecoder$StackMapFrameImpl.class   |  Bin 0 -> 2840 bytes
 ...ninitializedVerificationTypeInfoImpl.class |  Bin 0 -> 2199 bytes
 .../classfile/impl/StackMapDecoder.class      |  Bin 0 -> 13944 bytes
 .../classfile/impl/StackMapDecoder.java       |  289 +
 .../classfile/impl/StackMapGenerator$1.class  |  Bin 0 -> 2913 bytes
 .../classfile/impl/StackMapGenerator$2.class  |  Bin 0 -> 994 bytes
 .../impl/StackMapGenerator$Frame.class        |  Bin 0 -> 11943 bytes
 .../StackMapGenerator$RawExceptionCatch.class |  Bin 0 -> 2251 bytes
 .../impl/StackMapGenerator$Type.class         |  Bin 0 -> 7795 bytes
 .../classfile/impl/StackMapGenerator.class    |  Bin 0 -> 28550 bytes
 .../classfile/impl/StackMapGenerator.java     | 1402 +++++
 .../classfile/impl/SuperclassImpl.class       |  Bin 0 -> 1502 bytes
 .../classfile/impl/SuperclassImpl.java        |   56 +
 .../impl/TargetInfoImpl$CatchTargetImpl.class |  Bin 0 -> 2001 bytes
 .../impl/TargetInfoImpl$EmptyTargetImpl.class |  Bin 0 -> 2103 bytes
 ...etInfoImpl$FormalParameterTargetImpl.class |  Bin 0 -> 2086 bytes
 .../TargetInfoImpl$LocalVarTargetImpl.class   |  Bin 0 -> 2952 bytes
 ...argetInfoImpl$LocalVarTargetInfoImpl.class |  Bin 0 -> 2269 bytes
 .../TargetInfoImpl$OffsetTargetImpl.class     |  Bin 0 -> 2471 bytes
 .../TargetInfoImpl$SupertypeTargetImpl.class  |  Bin 0 -> 2022 bytes
 .../TargetInfoImpl$ThrowsTargetImpl.class     |  Bin 0 -> 1994 bytes
 ...argetInfoImpl$TypeArgumentTargetImpl.class |  Bin 0 -> 2676 bytes
 ...nfoImpl$TypeParameterBoundTargetImpl.class |  Bin 0 -> 2518 bytes
 ...rgetInfoImpl$TypeParameterTargetImpl.class |  Bin 0 -> 2337 bytes
 .../classfile/impl/TargetInfoImpl.class       |  Bin 0 -> 2407 bytes
 .../classfile/impl/TargetInfoImpl.java        |  139 +
 .../impl/TemporaryConstantPool.class          |  Bin 0 -> 8679 bytes
 .../classfile/impl/TemporaryConstantPool.java |  202 +
 .../classfile/impl/TerminalCodeBuilder.class  |  Bin 0 -> 400 bytes
 .../classfile/impl/TerminalCodeBuilder.java   |   32 +
 .../classfile/impl/TerminalFieldBuilder.class |  Bin 0 -> 329 bytes
 .../classfile/impl/TerminalFieldBuilder.java  |   32 +
 .../impl/TerminalMethodBuilder.class          |  Bin 0 -> 449 bytes
 .../classfile/impl/TerminalMethodBuilder.java |   34 +
 .../TransformImpl$ChainedClassTransform.class |  Bin 0 -> 3893 bytes
 .../TransformImpl$ChainedCodeTransform.class  |  Bin 0 -> 3683 bytes
 .../TransformImpl$ChainedFieldTransform.class |  Bin 0 -> 3704 bytes
 ...TransformImpl$ChainedMethodTransform.class |  Bin 0 -> 3725 bytes
 .../TransformImpl$ClassFieldTransform.class   |  Bin 0 -> 5579 bytes
 .../TransformImpl$ClassMethodTransform.class  |  Bin 0 -> 5601 bytes
 .../TransformImpl$MethodCodeTransform.class   |  Bin 0 -> 4573 bytes
 .../TransformImpl$ResolvedTransformImpl.class |  Bin 0 -> 3013 bytes
 ...TransformImpl$SupplierClassTransform.class |  Bin 0 -> 2987 bytes
 .../TransformImpl$SupplierCodeTransform.class |  Bin 0 -> 2970 bytes
 ...TransformImpl$SupplierFieldTransform.class |  Bin 0 -> 2987 bytes
 ...ransformImpl$SupplierMethodTransform.class |  Bin 0 -> 3004 bytes
 ...ansformImpl$UnresolvedClassTransform.class |  Bin 0 -> 1552 bytes
 ...ransformImpl$UnresolvedCodeTransform.class |  Bin 0 -> 1541 bytes
 ...ansformImpl$UnresolvedFieldTransform.class |  Bin 0 -> 1552 bytes
 ...nsformImpl$UnresolvedMethodTransform.class |  Bin 0 -> 1563 bytes
 .../classfile/impl/TransformImpl.class        |  Bin 0 -> 3052 bytes
 .../classfile/impl/TransformImpl.java         |  299 ++
 .../UnboundAttribute$AdHocAttribute.class     |  Bin 0 -> 1735 bytes
 ...undAttribute$EmptyBootstrapAttribute.class |  Bin 0 -> 1162 bytes
 ...boundAttribute$TypePathComponentImpl.class |  Bin 0 -> 2203 bytes
 ...te$UnboundAnnotationDefaultAttribute.class |  Bin 0 -> 1152 bytes
 ...dAttribute$UnboundCharacterRangeInfo.class |  Bin 0 -> 2288 bytes
 ...$UnboundCharacterRangeTableAttribute.class |  Bin 0 -> 1467 bytes
 ...ribute$UnboundCompilationIDAttribute.class |  Bin 0 -> 1140 bytes
 ...ribute$UnboundConstantValueAttribute.class |  Bin 0 -> 1176 bytes
 ...Attribute$UnboundDeprecatedAttribute.class |  Bin 0 -> 871 bytes
 ...bute$UnboundEnclosingMethodAttribute.class |  Bin 0 -> 1593 bytes
 ...Attribute$UnboundExceptionsAttribute.class |  Bin 0 -> 1380 bytes
 ...boundAttribute$UnboundInnerClassInfo.class |  Bin 0 -> 2930 bytes
 ...tribute$UnboundInnerClassesAttribute.class |  Bin 0 -> 1407 bytes
 ...boundAttribute$UnboundLineNumberInfo.class |  Bin 0 -> 1841 bytes
 ...bute$UnboundLineNumberTableAttribute.class |  Bin 0 -> 1440 bytes
 ...ndAttribute$UnboundLocalVariableInfo.class |  Bin 0 -> 2407 bytes
 ...e$UnboundLocalVariableTableAttribute.class |  Bin 0 -> 1474 bytes
 ...tribute$UnboundLocalVariableTypeInfo.class |  Bin 0 -> 2445 bytes
 ...boundLocalVariableTypeTableAttribute.class |  Bin 0 -> 1518 bytes
 ...Attribute$UnboundMethodParameterInfo.class |  Bin 0 -> 2235 bytes
 ...ute$UnboundMethodParametersAttribute.class |  Bin 0 -> 1453 bytes
 ...oundAttribute$UnboundModuleAttribute.class |  Bin 0 -> 4148 bytes
 ...undAttribute$UnboundModuleExportInfo.class |  Bin 0 -> 2661 bytes
 ...boundAttribute$UnboundModuleHashInfo.class |  Bin 0 -> 1989 bytes
 ...tribute$UnboundModuleHashesAttribute.class |  Bin 0 -> 1700 bytes
 ...bute$UnboundModuleMainClassAttribute.class |  Bin 0 -> 1159 bytes
 ...boundAttribute$UnboundModuleOpenInfo.class |  Bin 0 -> 2635 bytes
 ...ibute$UnboundModulePackagesAttribute.class |  Bin 0 -> 1452 bytes
 ...ndAttribute$UnboundModuleProvideInfo.class |  Bin 0 -> 2493 bytes
 ...dAttribute$UnboundModuleRequiresInfo.class |  Bin 0 -> 2587 bytes
 ...ute$UnboundModuleResolutionAttribute.class |  Bin 0 -> 1048 bytes
 ...tribute$UnboundModuleTargetAttribute.class |  Bin 0 -> 1140 bytes
 ...ndAttribute$UnboundNestHostAttribute.class |  Bin 0 -> 1110 bytes
 ...ttribute$UnboundNestMembersAttribute.class |  Bin 0 -> 1403 bytes
 ...$UnboundPermittedSubclassesAttribute.class |  Bin 0 -> 1443 bytes
 ...oundAttribute$UnboundRecordAttribute.class |  Bin 0 -> 1383 bytes
 ...Attribute$UnboundRecordComponentInfo.class |  Bin 0 -> 2684 bytes
 ...RuntimeInvisibleAnnotationsAttribute.class |  Bin 0 -> 1485 bytes
 ...visibleParameterAnnotationsAttribute.class |  Bin 0 -> 1611 bytes
 ...imeInvisibleTypeAnnotationsAttribute.class |  Bin 0 -> 1525 bytes
 ...ndRuntimeVisibleAnnotationsAttribute.class |  Bin 0 -> 1471 bytes
 ...VisibleParameterAnnotationsAttribute.class |  Bin 0 -> 1597 bytes
 ...ntimeVisibleTypeAnnotationsAttribute.class |  Bin 0 -> 1511 bytes
 ...dAttribute$UnboundSignatureAttribute.class |  Bin 0 -> 1102 bytes
 ...UnboundSourceDebugExtensionAttribute.class |  Bin 0 -> 1064 bytes
 ...Attribute$UnboundSourceFileAttribute.class |  Bin 0 -> 1109 bytes
 ...ndAttribute$UnboundSourceIDAttribute.class |  Bin 0 -> 1105 bytes
 ...ribute$UnboundStackMapTableAttribute.class |  Bin 0 -> 1423 bytes
 ...dAttribute$UnboundSyntheticAttribute.class |  Bin 0 -> 864 bytes
 ...boundAttribute$UnboundTypeAnnotation.class |  Bin 0 -> 8710 bytes
 .../classfile/impl/UnboundAttribute.class     |  Bin 0 -> 9124 bytes
 .../classfile/impl/UnboundAttribute.java      |  937 ++++
 .../jdk/internal/classfile/impl/Util$1.class  |  Bin 0 -> 1083 bytes
 .../jdk/internal/classfile/impl/Util$2.class  |  Bin 0 -> 1650 bytes
 .../jdk/internal/classfile/impl/Util.class    |  Bin 0 -> 13297 bytes
 .../std/jdk/internal/classfile/impl/Util.java |  240 +
 .../impl/verifier/ParserVerifier$1.class      |  Bin 0 -> 1177 bytes
 .../impl/verifier/ParserVerifier$1F.class     |  Bin 0 -> 1944 bytes
 .../impl/verifier/ParserVerifier$1M.class     |  Bin 0 -> 1945 bytes
 .../impl/verifier/ParserVerifier.class        |  Bin 0 -> 37876 bytes
 .../impl/verifier/ParserVerifier.java         |  494 ++
 .../impl/verifier/VerificationBytecodes.class |  Bin 0 -> 12824 bytes
 .../impl/verifier/VerificationBytecodes.java  |  384 ++
 .../impl/verifier/VerificationFrame$1.class   |  Bin 0 -> 1456 bytes
 .../impl/verifier/VerificationFrame.class     |  Bin 0 -> 12210 bytes
 .../impl/verifier/VerificationFrame.java      |  400 ++
 .../VerificationSignature$BasicType.class     |  Bin 0 -> 3215 bytes
 .../impl/verifier/VerificationSignature.class |  Bin 0 -> 6442 bytes
 .../impl/verifier/VerificationSignature.java  |  319 ++
 .../VerificationTable$StackMapReader.class    |  Bin 0 -> 7982 bytes
 .../VerificationTable$StackMapStream.class    |  Bin 0 -> 1292 bytes
 .../impl/verifier/VerificationTable.class     |  Bin 0 -> 4631 bytes
 .../impl/verifier/VerificationTable.java      |  411 ++
 .../impl/verifier/VerificationType$1.class    |  Bin 0 -> 1405 bytes
 .../impl/verifier/VerificationType.class      |  Bin 0 -> 13089 bytes
 .../impl/verifier/VerificationType.java       |  438 ++
 ...ificationWrapper$ConstantPoolWrapper.class |  Bin 0 -> 2688 bytes
 .../VerificationWrapper$MethodWrapper.class   |  Bin 0 -> 6635 bytes
 .../impl/verifier/VerificationWrapper.class   |  Bin 0 -> 4228 bytes
 .../impl/verifier/VerificationWrapper.java    |  204 +
 .../impl/verifier/VerifierImpl$1.class        |  Bin 0 -> 1393 bytes
 ...rifierImpl$sig_as_verification_types.class |  Bin 0 -> 1282 bytes
 .../impl/verifier/VerifierImpl.class          |  Bin 0 -> 47281 bytes
 .../classfile/impl/verifier/VerifierImpl.java | 1843 +++++++
 .../jdk/internal/constant/ConstantUtils.class |  Bin 0 -> 6839 bytes
 .../jdk/internal/constant/ConstantUtils.java  |  322 ++
 .../DirectMethodHandleDescImpl$1.class        |  Bin 0 -> 1387 bytes
 .../constant/DirectMethodHandleDescImpl.class |  Bin 0 -> 7349 bytes
 .../constant/DirectMethodHandleDescImpl.java  |  205 +
 .../constant/MethodTypeDescImpl$1.class       |  Bin 0 -> 1615 bytes
 .../constant/MethodTypeDescImpl.class         |  Bin 0 -> 8414 bytes
 .../internal/constant/MethodTypeDescImpl.java |  266 +
 .../internal/constant/ModuleDescImpl.class    |  Bin 0 -> 1551 bytes
 .../jdk/internal/constant/ModuleDescImpl.java |   39 +
 .../internal/constant/PackageDescImpl.class   |  Bin 0 -> 1573 bytes
 .../internal/constant/PackageDescImpl.java    |   39 +
 .../constant/PrimitiveClassDescImpl.class     |  Bin 0 -> 2471 bytes
 .../constant/PrimitiveClassDescImpl.java      |   77 +
 .../constant/ReferenceClassDescImpl.class     |  Bin 0 -> 3454 bytes
 .../constant/ReferenceClassDescImpl.java      |  144 +
 .../internal/event/DeserializationEvent.class |  Bin 0 -> 636 bytes
 .../internal/event/DeserializationEvent.java  |   42 +
 .../jdk/internal/event/ErrorThrownEvent.class |  Bin 0 -> 793 bytes
 .../jdk/internal/event/ErrorThrownEvent.java  |   47 +
 .../std/jdk/internal/event/Event.class        |  Bin 0 -> 774 bytes
 .../std/jdk/internal/event/Event.java         |   96 +
 .../event/EventHelper$ThreadTrackHolder.class |  Bin 0 -> 604 bytes
 .../std/jdk/internal/event/EventHelper.class  |  Bin 0 -> 6427 bytes
 .../std/jdk/internal/event/EventHelper.java   |  173 +
 .../event/ExceptionStatisticsEvent.class      |  Bin 0 -> 566 bytes
 .../event/ExceptionStatisticsEvent.java       |   47 +
 .../internal/event/ExceptionThrownEvent.class |  Bin 0 -> 805 bytes
 .../internal/event/ExceptionThrownEvent.java  |   47 +
 .../jdk/internal/event/FileForceEvent.class   |  Bin 0 -> 926 bytes
 .../jdk/internal/event/FileForceEvent.java    |  110 +
 .../jdk/internal/event/FileReadEvent.class    |  Bin 0 -> 741 bytes
 .../std/jdk/internal/event/FileReadEvent.java |   56 +
 .../jdk/internal/event/FileWriteEvent.class   |  Bin 0 -> 712 bytes
 .../jdk/internal/event/FileWriteEvent.java    |   55 +
 .../std/jdk/internal/event/JFRTracing.class   |  Bin 0 -> 1173 bytes
 .../std/jdk/internal/event/JFRTracing.java    |   52 +
 .../internal/event/ProcessStartEvent.class    |  Bin 0 -> 399 bytes
 .../jdk/internal/event/ProcessStartEvent.java |   36 +
 .../SecurityPropertyModificationEvent.class   |  Bin 0 -> 421 bytes
 .../SecurityPropertyModificationEvent.java    |   35 +
 .../event/SecurityProviderServiceEvent.class  |  Bin 0 -> 607 bytes
 .../event/SecurityProviderServiceEvent.java   |   45 +
 .../SerializationMisdeclarationEvent.class    |  Bin 0 -> 937 bytes
 .../SerializationMisdeclarationEvent.java     |   91 +
 .../jdk/internal/event/SocketReadEvent.class  |  Bin 0 -> 2096 bytes
 .../jdk/internal/event/SocketReadEvent.java   |  149 +
 .../jdk/internal/event/SocketWriteEvent.class |  Bin 0 -> 1966 bytes
 .../jdk/internal/event/SocketWriteEvent.java  |  140 +
 .../internal/event/TLSHandshakeEvent.class    |  Bin 0 -> 461 bytes
 .../jdk/internal/event/TLSHandshakeEvent.java |   38 +
 .../jdk/internal/event/ThreadSleepEvent.class |  Bin 0 -> 515 bytes
 .../jdk/internal/event/ThreadSleepEvent.java  |   43 +
 .../jdk/internal/event/ThrowableTracer.class  |  Bin 0 -> 1641 bytes
 .../jdk/internal/event/ThrowableTracer.java   |   64 +
 .../event/VirtualThreadEndEvent.class         |  Bin 0 -> 538 bytes
 .../internal/event/VirtualThreadEndEvent.java |   41 +
 .../event/VirtualThreadPinnedEvent.class      |  Bin 0 -> 343 bytes
 .../event/VirtualThreadPinnedEvent.java       |   31 +
 .../event/VirtualThreadStartEvent.class       |  Bin 0 -> 544 bytes
 .../event/VirtualThreadStartEvent.java        |   41 +
 .../VirtualThreadSubmitFailedEvent.class      |  Bin 0 -> 436 bytes
 .../event/VirtualThreadSubmitFailedEvent.java |   33 +
 .../internal/event/X509CertificateEvent.class |  Bin 0 -> 718 bytes
 .../internal/event/X509CertificateEvent.java  |   52 +
 .../internal/event/X509ValidationEvent.class  |  Bin 0 -> 418 bytes
 .../internal/event/X509ValidationEvent.java   |   37 +
 ...actMemorySegmentImpl$SegmentSplitter.class |  Bin 0 -> 2871 bytes
 .../foreign/AbstractMemorySegmentImpl.class   |  Bin 0 -> 35691 bytes
 .../foreign/AbstractMemorySegmentImpl.java    |  985 ++++
 .../std/jdk/internal/foreign/ArenaImpl.class  |  Bin 0 -> 1574 bytes
 .../std/jdk/internal/foreign/ArenaImpl.java   |   63 +
 .../std/jdk/internal/foreign/CABI.class       |  Bin 0 -> 3118 bytes
 .../std/jdk/internal/foreign/CABI.java        |  108 +
 ...ConfinedSession$ConfinedResourceList.class |  Bin 0 -> 1244 bytes
 .../internal/foreign/ConfinedSession.class    |  Bin 0 -> 2401 bytes
 .../jdk/internal/foreign/ConfinedSession.java |  117 +
 .../foreign/FunctionDescriptorImpl.class      |  Bin 0 -> 7867 bytes
 .../foreign/FunctionDescriptorImpl.java       |  196 +
 .../foreign/GlobalSession$HeapSession.class   |  Bin 0 -> 935 bytes
 .../jdk/internal/foreign/GlobalSession.class  |  Bin 0 -> 1402 bytes
 .../jdk/internal/foreign/GlobalSession.java   |  101 +
 .../HeapMemorySegmentImpl$OfByte.class        |  Bin 0 -> 2180 bytes
 .../HeapMemorySegmentImpl$OfChar.class        |  Bin 0 -> 2181 bytes
 .../HeapMemorySegmentImpl$OfDouble.class      |  Bin 0 -> 2190 bytes
 .../HeapMemorySegmentImpl$OfFloat.class       |  Bin 0 -> 2184 bytes
 .../foreign/HeapMemorySegmentImpl$OfInt.class |  Bin 0 -> 2174 bytes
 .../HeapMemorySegmentImpl$OfLong.class        |  Bin 0 -> 2180 bytes
 .../HeapMemorySegmentImpl$OfShort.class       |  Bin 0 -> 2186 bytes
 .../foreign/HeapMemorySegmentImpl.class       |  Bin 0 -> 4060 bytes
 .../foreign/HeapMemorySegmentImpl.java        |  290 +
 .../internal/foreign/ImplicitSession.class    |  Bin 0 -> 1280 bytes
 .../jdk/internal/foreign/ImplicitSession.java |   67 +
 .../LayoutPath$DereferenceElement.class       |  Bin 0 -> 2159 bytes
 .../LayoutPath$GroupElementByIndex.class      |  Bin 0 -> 2517 bytes
 .../LayoutPath$GroupElementByName.class       |  Bin 0 -> 2428 bytes
 .../foreign/LayoutPath$SequenceElement.class  |  Bin 0 -> 2216 bytes
 .../LayoutPath$SequenceElementByIndex.class   |  Bin 0 -> 2538 bytes
 .../LayoutPath$SequenceElementByRange.class   |  Bin 0 -> 2800 bytes
 .../std/jdk/internal/foreign/LayoutPath.class |  Bin 0 -> 15059 bytes
 .../std/jdk/internal/foreign/LayoutPath.java  |  502 ++
 .../foreign/MappedMemorySegmentImpl.class     |  Bin 0 -> 3437 bytes
 .../foreign/MappedMemorySegmentImpl.java      |   95 +
 ...nImpl$ResourceList$ResourceCleanup$1.class |  Bin 0 -> 855 bytes
 ...nImpl$ResourceList$ResourceCleanup$2.class |  Bin 0 -> 983 bytes
 ...ionImpl$ResourceList$ResourceCleanup.class |  Bin 0 -> 1111 bytes
 .../MemorySessionImpl$ResourceList.class      |  Bin 0 -> 1276 bytes
 .../internal/foreign/MemorySessionImpl.class  |  Bin 0 -> 7916 bytes
 .../internal/foreign/MemorySessionImpl.java   |  321 ++
 .../foreign/NativeMemorySegmentImpl.class     |  Bin 0 -> 2654 bytes
 .../foreign/NativeMemorySegmentImpl.java      |   99 +
 .../internal/foreign/SegmentFactories$1.class |  Bin 0 -> 1353 bytes
 .../internal/foreign/SegmentFactories$2.class |  Bin 0 -> 1060 bytes
 .../internal/foreign/SegmentFactories.class   |  Bin 0 -> 6872 bytes
 .../internal/foreign/SegmentFactories.java    |  215 +
 .../SharedSession$SharedResourceList.class    |  Bin 0 -> 2363 bytes
 .../jdk/internal/foreign/SharedSession.class  |  Bin 0 -> 2309 bytes
 .../jdk/internal/foreign/SharedSession.java   |  141 +
 .../internal/foreign/SlicingAllocator.class   |  Bin 0 -> 1139 bytes
 .../internal/foreign/SlicingAllocator.java    |   55 +
 .../foreign/StringSupport$CharsetKind.class   |  Bin 0 -> 2527 bytes
 .../jdk/internal/foreign/StringSupport.class  |  Bin 0 -> 7201 bytes
 .../jdk/internal/foreign/StringSupport.java   |  332 ++
 .../jdk/internal/foreign/SystemLookup$1.class |  Bin 0 -> 900 bytes
 .../jdk/internal/foreign/SystemLookup$2.class |  Bin 0 -> 1095 bytes
 .../SystemLookup$WindowsFallbackSymbols.class |  Bin 0 -> 4782 bytes
 .../jdk/internal/foreign/SystemLookup.class   |  Bin 0 -> 8339 bytes
 .../jdk/internal/foreign/SystemLookup.java    |  228 +
 .../foreign/Utils$1VarHandleCache.class       |  Bin 0 -> 797 bytes
 .../internal/foreign/Utils$BaseAndScale.class |  Bin 0 -> 3610 bytes
 .../std/jdk/internal/foreign/Utils.class      |  Bin 0 -> 11419 bytes
 .../std/jdk/internal/foreign/Utils.java       |  325 ++
 .../internal/foreign/abi/ABIDescriptor.class  |  Bin 0 -> 1596 bytes
 .../internal/foreign/abi/ABIDescriptor.java   |   79 +
 .../abi/AbstractLinker$LinkRequest.class      |  Bin 0 -> 1941 bytes
 .../AbstractLinker$UpcallStubFactory.class    |  Bin 0 -> 380 bytes
 .../internal/foreign/abi/AbstractLinker.class |  Bin 0 -> 16908 bytes
 .../internal/foreign/abi/AbstractLinker.java  |  282 +
 .../internal/foreign/abi/Architecture.class   |  Bin 0 -> 185 bytes
 .../internal/foreign/abi/Architecture.java    |   30 +
 .../foreign/abi/Binding$Allocate.class        |  Bin 0 -> 3256 bytes
 .../foreign/abi/Binding$BoxAddress.class      |  Bin 0 -> 3818 bytes
 .../foreign/abi/Binding$BufferLoad.class      |  Bin 0 -> 5684 bytes
 .../foreign/abi/Binding$BufferStore.class     |  Bin 0 -> 5548 bytes
 .../foreign/abi/Binding$Builder.class         |  Bin 0 -> 6528 bytes
 .../internal/foreign/abi/Binding$Cast$1.class |  Bin 0 -> 2035 bytes
 .../internal/foreign/abi/Binding$Cast.class   |  Bin 0 -> 5373 bytes
 .../internal/foreign/abi/Binding$Copy.class   |  Bin 0 -> 3766 bytes
 .../foreign/abi/Binding$Dereference.class     |  Bin 0 -> 517 bytes
 .../internal/foreign/abi/Binding$Dup.class    |  Bin 0 -> 2761 bytes
 .../internal/foreign/abi/Binding$Move.class   |  Bin 0 -> 523 bytes
 .../foreign/abi/Binding$SegmentBase.class     |  Bin 0 -> 3144 bytes
 .../foreign/abi/Binding$SegmentOffset.class   |  Bin 0 -> 3642 bytes
 .../foreign/abi/Binding$ShiftLeft.class       |  Bin 0 -> 3227 bytes
 .../foreign/abi/Binding$ShiftRight.class      |  Bin 0 -> 3233 bytes
 .../internal/foreign/abi/Binding$VMLoad.class |  Bin 0 -> 3410 bytes
 .../foreign/abi/Binding$VMStore.class         |  Bin 0 -> 3606 bytes
 .../jdk/internal/foreign/abi/Binding.class    |  Bin 0 -> 8794 bytes
 .../std/jdk/internal/foreign/abi/Binding.java |  902 ++++
 .../abi/BindingInterpreter$LoadFunc.class     |  Bin 0 -> 525 bytes
 .../abi/BindingInterpreter$StoreFunc.class    |  Bin 0 -> 413 bytes
 .../foreign/abi/BindingInterpreter.class      |  Bin 0 -> 2599 bytes
 .../foreign/abi/BindingInterpreter.java       |   61 +
 .../foreign/abi/BindingSpecializer$1.class    |  Bin 0 -> 2254 bytes
 .../foreign/abi/BindingSpecializer.class      |  Bin 0 -> 37068 bytes
 .../foreign/abi/BindingSpecializer.java       |  996 ++++
 .../foreign/abi/CallingSequence.class         |  Bin 0 -> 5693 bytes
 .../internal/foreign/abi/CallingSequence.java |  220 +
 .../foreign/abi/CallingSequenceBuilder.class  |  Bin 0 -> 14989 bytes
 .../foreign/abi/CallingSequenceBuilder.java   |  273 +
 .../foreign/abi/CapturableState.class         |  Bin 0 -> 5565 bytes
 .../internal/foreign/abi/CapturableState.java |   88 +
 .../foreign/abi/DowncallLinker$1.class        |  Bin 0 -> 1351 bytes
 .../foreign/abi/DowncallLinker$2.class        |  Bin 0 -> 2079 bytes
 .../abi/DowncallLinker$InvocationData.class   |  Bin 0 -> 1948 bytes
 .../internal/foreign/abi/DowncallLinker.class |  Bin 0 -> 13694 bytes
 .../internal/foreign/abi/DowncallLinker.java  |  223 +
 .../abi/LinkerOptions$CaptureCallState.class  |  Bin 0 -> 2176 bytes
 .../foreign/abi/LinkerOptions$Critical.class  |  Bin 0 -> 1971 bytes
 .../abi/LinkerOptions$FirstVariadicArg.class  |  Bin 0 -> 2411 bytes
 .../abi/LinkerOptions$LinkerOptionImpl.class  |  Bin 0 -> 1434 bytes
 .../internal/foreign/abi/LinkerOptions.class  |  Bin 0 -> 6498 bytes
 .../internal/foreign/abi/LinkerOptions.java   |  162 +
 .../abi/NativeEntryPoint$CacheKey.class       |  Bin 0 -> 3118 bytes
 .../foreign/abi/NativeEntryPoint.class        |  Bin 0 -> 5313 bytes
 .../foreign/abi/NativeEntryPoint.java         |  112 +
 .../internal/foreign/abi/SharedUtils$1.class  |  Bin 0 -> 956 bytes
 .../internal/foreign/abi/SharedUtils$2.class  |  Bin 0 -> 1465 bytes
 .../internal/foreign/abi/SharedUtils$3.class  |  Bin 0 -> 1130 bytes
 .../internal/foreign/abi/SharedUtils$4.class  |  Bin 0 -> 1257 bytes
 .../internal/foreign/abi/SharedUtils.class    |  Bin 0 -> 24194 bytes
 .../jdk/internal/foreign/abi/SharedUtils.java |  526 ++
 .../foreign/abi/SoftReferenceCache$Node.class |  Bin 0 -> 1636 bytes
 .../foreign/abi/SoftReferenceCache.class      |  Bin 0 -> 2096 bytes
 .../foreign/abi/SoftReferenceCache.java       |   57 +
 .../internal/foreign/abi/StubLocations.class  |  Bin 0 -> 1467 bytes
 .../internal/foreign/abi/StubLocations.java   |   36 +
 .../foreign/abi/UpcallLinker$CallRegs.class   |  Bin 0 -> 1809 bytes
 .../abi/UpcallLinker$InvocationData.class     |  Bin 0 -> 3218 bytes
 .../internal/foreign/abi/UpcallLinker.class   |  Bin 0 -> 16386 bytes
 .../internal/foreign/abi/UpcallLinker.java    |  219 +
 .../internal/foreign/abi/UpcallStubs$1.class  |  Bin 0 -> 866 bytes
 .../internal/foreign/abi/UpcallStubs.class    |  Bin 0 -> 1907 bytes
 .../jdk/internal/foreign/abi/UpcallStubs.java |   64 +
 .../jdk/internal/foreign/abi/VMStorage.class  |  Bin 0 -> 2162 bytes
 .../jdk/internal/foreign/abi/VMStorage.java   |   46 +
 .../aarch64/AArch64Architecture$Regs.class    |  Bin 0 -> 2927 bytes
 .../AArch64Architecture$StorageType.class     |  Bin 0 -> 431 bytes
 .../abi/aarch64/AArch64Architecture.class     |  Bin 0 -> 3497 bytes
 .../abi/aarch64/AArch64Architecture.java      |  177 +
 .../foreign/abi/aarch64/CallArranger$1.class  |  Bin 0 -> 1020 bytes
 .../CallArranger$BindingCalculator.class      |  Bin 0 -> 1279 bytes
 .../abi/aarch64/CallArranger$Bindings.class   |  Bin 0 -> 1880 bytes
 .../CallArranger$BoxBindingCalculator.class   |  Bin 0 -> 5289 bytes
 ...nger$StorageCalculator$StructStorage.class |  Bin 0 -> 2568 bytes
 .../CallArranger$StorageCalculator.class      |  Bin 0 -> 6086 bytes
 .../CallArranger$UnboxBindingCalculator.class |  Bin 0 -> 5611 bytes
 .../foreign/abi/aarch64/CallArranger.class    |  Bin 0 -> 10034 bytes
 .../foreign/abi/aarch64/CallArranger.java     |  523 ++
 .../foreign/abi/aarch64/TypeClass.class       |  Bin 0 -> 5416 bytes
 .../foreign/abi/aarch64/TypeClass.java        |  137 +
 .../linux/LinuxAArch64CallArranger.class      |  Bin 0 -> 941 bytes
 .../linux/LinuxAArch64CallArranger.java       |   62 +
 .../linux/LinuxAArch64Linker$1Holder.class    |  Bin 0 -> 762 bytes
 .../aarch64/linux/LinuxAArch64Linker.class    |  Bin 0 -> 2439 bytes
 .../abi/aarch64/linux/LinuxAArch64Linker.java |   76 +
 .../macos/MacOsAArch64CallArranger.class      |  Bin 0 -> 941 bytes
 .../macos/MacOsAArch64CallArranger.java       |   62 +
 .../macos/MacOsAArch64Linker$1Holder.class    |  Bin 0 -> 762 bytes
 .../aarch64/macos/MacOsAArch64Linker.class    |  Bin 0 -> 2439 bytes
 .../abi/aarch64/macos/MacOsAArch64Linker.java |   76 +
 .../windows/WindowsAArch64CallArranger.class  |  Bin 0 -> 3409 bytes
 .../windows/WindowsAArch64CallArranger.java   |  115 +
 .../WindowsAArch64Linker$1Holder.class        |  Bin 0 -> 784 bytes
 .../windows/WindowsAArch64Linker.class        |  Bin 0 -> 2577 bytes
 .../aarch64/windows/WindowsAArch64Linker.java |   72 +
 .../foreign/abi/fallback/FFIABI.class         |  Bin 0 -> 1353 bytes
 .../internal/foreign/abi/fallback/FFIABI.java |   42 +
 .../foreign/abi/fallback/FFIStatus.class      |  Bin 0 -> 1866 bytes
 .../foreign/abi/fallback/FFIStatus.java       |   52 +
 .../foreign/abi/fallback/FFIType.class        |  Bin 0 -> 9969 bytes
 .../foreign/abi/fallback/FFIType.java         |  162 +
 .../abi/fallback/FallbackLinker$1Holder.class |  Bin 0 -> 713 bytes
 .../abi/fallback/FallbackLinker$2Holder.class |  Bin 0 -> 3445 bytes
 .../FallbackLinker$DowncallData.class         |  Bin 0 -> 2778 bytes
 .../fallback/FallbackLinker$UpcallData.class  |  Bin 0 -> 2452 bytes
 .../foreign/abi/fallback/FallbackLinker.class |  Bin 0 -> 17622 bytes
 .../foreign/abi/fallback/FallbackLinker.java  |  329 ++
 .../foreign/abi/fallback/LibFallback$1.class  |  Bin 0 -> 1254 bytes
 .../LibFallback$NativeConstants.class         |  Bin 0 -> 2043 bytes
 .../foreign/abi/fallback/LibFallback.class    |  Bin 0 -> 8249 bytes
 .../foreign/abi/fallback/LibFallback.java     |  278 +
 .../foreign/abi/ppc64/CallArranger$1.class    |  Bin 0 -> 950 bytes
 .../CallArranger$BindingCalculator.class      |  Bin 0 -> 1111 bytes
 .../abi/ppc64/CallArranger$Bindings.class     |  Bin 0 -> 1868 bytes
 .../CallArranger$BoxBindingCalculator.class   |  Bin 0 -> 6236 bytes
 .../abi/ppc64/CallArranger$HfaRegs.class      |  Bin 0 -> 1833 bytes
 .../CallArranger$StorageCalculator.class      |  Bin 0 -> 5268 bytes
 .../CallArranger$UnboxBindingCalculator.class |  Bin 0 -> 6212 bytes
 .../foreign/abi/ppc64/CallArranger.class      |  Bin 0 -> 9351 bytes
 .../foreign/abi/ppc64/CallArranger.java       |  521 ++
 .../abi/ppc64/PPC64Architecture$Regs.class    |  Bin 0 -> 2912 bytes
 .../ppc64/PPC64Architecture$StorageType.class |  Bin 0 -> 420 bytes
 .../foreign/abi/ppc64/PPC64Architecture.class |  Bin 0 -> 3513 bytes
 .../foreign/abi/ppc64/PPC64Architecture.java  |  180 +
 .../foreign/abi/ppc64/TypeClass.class         |  Bin 0 -> 5575 bytes
 .../internal/foreign/abi/ppc64/TypeClass.java |  136 +
 .../abi/ppc64/aix/AixCallArranger.class       |  Bin 0 -> 508 bytes
 .../abi/ppc64/aix/AixCallArranger.java        |   44 +
 .../ppc64/aix/AixPPC64Linker$1Holder.class    |  Bin 0 -> 718 bytes
 .../abi/ppc64/aix/AixPPC64Linker.class        |  Bin 0 -> 3552 bytes
 .../foreign/abi/ppc64/aix/AixPPC64Linker.java |   90 +
 .../abi/ppc64/linux/ABIv1CallArranger.class   |  Bin 0 -> 518 bytes
 .../abi/ppc64/linux/ABIv1CallArranger.java    |   44 +
 .../abi/ppc64/linux/ABIv2CallArranger.class   |  Bin 0 -> 518 bytes
 .../abi/ppc64/linux/ABIv2CallArranger.java    |   44 +
 .../linux/LinuxPPC64Linker$1Holder.class      |  Bin 0 -> 740 bytes
 .../abi/ppc64/linux/LinuxPPC64Linker.class    |  Bin 0 -> 2417 bytes
 .../abi/ppc64/linux/LinuxPPC64Linker.java     |   72 +
 .../linux/LinuxPPC64leLinker$1Holder.class    |  Bin 0 -> 752 bytes
 .../abi/ppc64/linux/LinuxPPC64leLinker.class  |  Bin 0 -> 2427 bytes
 .../abi/ppc64/linux/LinuxPPC64leLinker.java   |   72 +
 .../riscv64/RISCV64Architecture$Regs.class    |  Bin 0 -> 3641 bytes
 .../RISCV64Architecture$StorageType.class     |  Bin 0 -> 430 bytes
 .../abi/riscv64/RISCV64Architecture.class     |  Bin 0 -> 3506 bytes
 .../abi/riscv64/RISCV64Architecture.java      |  180 +
 .../linux/LinuxRISCV64CallArranger$1.class    |  Bin 0 -> 1161 bytes
 ...ISCV64CallArranger$BindingCalculator.class |  Bin 0 -> 1931 bytes
 .../LinuxRISCV64CallArranger$Bindings.class   |  Bin 0 -> 2000 bytes
 ...V64CallArranger$BoxBindingCalculator.class |  Bin 0 -> 7015 bytes
 ...ISCV64CallArranger$StorageCalculator.class |  Bin 0 -> 4435 bytes
 ...4CallArranger$UnboxBindingCalculator.class |  Bin 0 -> 6967 bytes
 .../linux/LinuxRISCV64CallArranger.class      |  Bin 0 -> 8838 bytes
 .../linux/LinuxRISCV64CallArranger.java       |  481 ++
 .../linux/LinuxRISCV64Linker$1Holder.class    |  Bin 0 -> 762 bytes
 .../riscv64/linux/LinuxRISCV64Linker.class    |  Bin 0 -> 2383 bytes
 .../abi/riscv64/linux/LinuxRISCV64Linker.java |   74 +
 .../linux/TypeClass$FieldCounter.class        |  Bin 0 -> 4758 bytes
 .../linux/TypeClass$FlattenedFieldDesc.class  |  Bin 0 -> 2175 bytes
 .../foreign/abi/riscv64/linux/TypeClass.class |  Bin 0 -> 6844 bytes
 .../foreign/abi/riscv64/linux/TypeClass.java  |  221 +
 .../abi/s390/S390Architecture$Regs.class      |  Bin 0 -> 1753 bytes
 .../s390/S390Architecture$StorageType.class   |  Bin 0 -> 415 bytes
 .../foreign/abi/s390/S390Architecture.class   |  Bin 0 -> 3504 bytes
 .../foreign/abi/s390/S390Architecture.java    |  148 +
 .../s390/linux/LinuxS390CallArranger$1.class  |  Bin 0 -> 1065 bytes
 ...uxS390CallArranger$BindingCalculator.class |  Bin 0 -> 1043 bytes
 .../LinuxS390CallArranger$Bindings.class      |  Bin 0 -> 1961 bytes
 ...390CallArranger$BoxBindingCalculator.class |  Bin 0 -> 4498 bytes
 ...uxS390CallArranger$StorageCalculator.class |  Bin 0 -> 2649 bytes
 ...0CallArranger$UnboxBindingCalculator.class |  Bin 0 -> 4410 bytes
 .../s390/linux/LinuxS390CallArranger.class    |  Bin 0 -> 7812 bytes
 .../abi/s390/linux/LinuxS390CallArranger.java |  318 ++
 .../s390/linux/LinuxS390Linker$1Holder.class  |  Bin 0 -> 729 bytes
 .../abi/s390/linux/LinuxS390Linker.class      |  Bin 0 -> 2350 bytes
 .../abi/s390/linux/LinuxS390Linker.java       |   71 +
 .../foreign/abi/s390/linux/TypeClass.class    |  Bin 0 -> 5176 bytes
 .../foreign/abi/s390/linux/TypeClass.java     |  123 +
 .../abi/x64/X86_64Architecture$Regs.class     |  Bin 0 -> 2665 bytes
 .../x64/X86_64Architecture$StorageType.class  |  Bin 0 -> 447 bytes
 .../foreign/abi/x64/X86_64Architecture.class  |  Bin 0 -> 4931 bytes
 .../foreign/abi/x64/X86_64Architecture.java   |  176 +
 .../abi/x64/sysv/ArgumentClassImpl.class      |  Bin 0 -> 2303 bytes
 .../abi/x64/sysv/ArgumentClassImpl.java       |   75 +
 .../foreign/abi/x64/sysv/CallArranger$1.class |  Bin 0 -> 992 bytes
 .../sysv/CallArranger$BindingCalculator.class |  Bin 0 -> 979 bytes
 .../abi/x64/sysv/CallArranger$Bindings.class  |  Bin 0 -> 2027 bytes
 .../CallArranger$BoxBindingCalculator.class   |  Bin 0 -> 4651 bytes
 .../sysv/CallArranger$StorageCalculator.class |  Bin 0 -> 5274 bytes
 .../CallArranger$UnboxBindingCalculator.class |  Bin 0 -> 4485 bytes
 .../foreign/abi/x64/sysv/CallArranger.class   |  Bin 0 -> 9745 bytes
 .../foreign/abi/x64/sysv/CallArranger.java    |  354 ++
 .../abi/x64/sysv/SysVx64Linker$1Holder.class  |  Bin 0 -> 707 bytes
 .../foreign/abi/x64/sysv/SysVx64Linker.class  |  Bin 0 -> 2321 bytes
 .../foreign/abi/x64/sysv/SysVx64Linker.java   |   74 +
 .../foreign/abi/x64/sysv/TypeClass$1.class    |  Bin 0 -> 882 bytes
 .../foreign/abi/x64/sysv/TypeClass$Kind.class |  Bin 0 -> 1424 bytes
 .../foreign/abi/x64/sysv/TypeClass.class      |  Bin 0 -> 11328 bytes
 .../foreign/abi/x64/sysv/TypeClass.java       |  247 +
 .../abi/x64/windows/CallArranger$1.class      |  Bin 0 -> 1046 bytes
 ...ranger$1CallingSequenceBuilderHelper.class |  Bin 0 -> 2965 bytes
 .../CallArranger$BindingCalculator.class      |  Bin 0 -> 508 bytes
 .../x64/windows/CallArranger$Bindings.class   |  Bin 0 -> 1904 bytes
 .../CallArranger$BoxBindingCalculator.class   |  Bin 0 -> 4204 bytes
 .../CallArranger$StorageCalculator.class      |  Bin 0 -> 1947 bytes
 .../CallArranger$UnboxBindingCalculator.class |  Bin 0 -> 4519 bytes
 .../abi/x64/windows/CallArranger.class        |  Bin 0 -> 8095 bytes
 .../foreign/abi/x64/windows/CallArranger.java |  297 +
 .../foreign/abi/x64/windows/TypeClass.class   |  Bin 0 -> 3546 bytes
 .../foreign/abi/x64/windows/TypeClass.java    |   91 +
 .../windows/Windowsx64Linker$1Holder.class    |  Bin 0 -> 740 bytes
 .../abi/x64/windows/Windowsx64Linker.class    |  Bin 0 -> 2473 bytes
 .../abi/x64/windows/Windowsx64Linker.java     |   73 +
 .../layout/AbstractGroupLayout$Kind.class     |  Bin 0 -> 1499 bytes
 .../foreign/layout/AbstractGroupLayout.class  |  Bin 0 -> 4446 bytes
 .../foreign/layout/AbstractGroupLayout.java   |  133 +
 .../layout/AbstractLayout$1Holder.class       |  Bin 0 -> 1676 bytes
 .../foreign/layout/AbstractLayout.class       |  Bin 0 -> 9696 bytes
 .../foreign/layout/AbstractLayout.java        |  229 +
 .../foreign/layout/MemoryLayoutUtil.class     |  Bin 0 -> 826 bytes
 .../foreign/layout/MemoryLayoutUtil.java      |   40 +
 .../foreign/layout/PaddingLayoutImpl.class    |  Bin 0 -> 3516 bytes
 .../foreign/layout/PaddingLayoutImpl.java     |   74 +
 .../foreign/layout/SequenceLayoutImpl.class   |  Bin 0 -> 6923 bytes
 .../foreign/layout/SequenceLayoutImpl.java    |  223 +
 .../foreign/layout/StructLayoutImpl.class     |  Bin 0 -> 4420 bytes
 .../foreign/layout/StructLayoutImpl.java      |   57 +
 .../foreign/layout/UnionLayoutImpl.class      |  Bin 0 -> 3987 bytes
 .../foreign/layout/UnionLayoutImpl.java       |   54 +
 ...$AbstractValueLayout$1VarHandleCache.class |  Bin 0 -> 1158 bytes
 .../ValueLayouts$AbstractValueLayout.class    |  Bin 0 -> 7744 bytes
 .../layout/ValueLayouts$OfAddressImpl.class   |  Bin 0 -> 6127 bytes
 .../layout/ValueLayouts$OfBooleanImpl.class   |  Bin 0 -> 4044 bytes
 .../layout/ValueLayouts$OfByteImpl.class      |  Bin 0 -> 3982 bytes
 .../layout/ValueLayouts$OfCharImpl.class      |  Bin 0 -> 4000 bytes
 .../layout/ValueLayouts$OfDoubleImpl.class    |  Bin 0 -> 4023 bytes
 .../layout/ValueLayouts$OfFloatImpl.class     |  Bin 0 -> 4009 bytes
 .../layout/ValueLayouts$OfIntImpl.class       |  Bin 0 -> 3985 bytes
 .../layout/ValueLayouts$OfLongImpl.class      |  Bin 0 -> 3995 bytes
 .../layout/ValueLayouts$OfShortImpl.class     |  Bin 0 -> 4009 bytes
 .../foreign/layout/ValueLayouts.class         |  Bin 0 -> 3767 bytes
 .../internal/foreign/layout/ValueLayouts.java |  412 ++
 .../std/jdk/internal/icu/impl/BMPSet.class    |  Bin 0 -> 6132 bytes
 .../std/jdk/internal/icu/impl/BMPSet.java     |  527 ++
 .../std/jdk/internal/icu/impl/CharTrie.class  |  Bin 0 -> 2255 bytes
 .../std/jdk/internal/icu/impl/CharTrie.java   |  177 +
 .../icu/impl/CharacterIteratorWrapper.class   |  Bin 0 -> 2194 bytes
 .../icu/impl/CharacterIteratorWrapper.java    |  147 +
 .../jdk/internal/icu/impl/ICUBinary$1.class   |  Bin 0 -> 1069 bytes
 .../icu/impl/ICUBinary$Authenticate.class     |  Bin 0 -> 278 bytes
 .../icu/impl/ICUBinary$IsAcceptable.class     |  Bin 0 -> 654 bytes
 .../std/jdk/internal/icu/impl/ICUBinary.class |  Bin 0 -> 7632 bytes
 .../std/jdk/internal/icu/impl/ICUBinary.java  |  324 ++
 .../Norm2AllModes$ComposeNormalizer2.class    |  Bin 0 -> 2308 bytes
 .../Norm2AllModes$DecomposeNormalizer2.class  |  Bin 0 -> 1774 bytes
 .../icu/impl/Norm2AllModes$NFCSingleton.class |  Bin 0 -> 734 bytes
 .../impl/Norm2AllModes$NFKCSingleton.class    |  Bin 0 -> 738 bytes
 .../impl/Norm2AllModes$NoopNormalizer2.class  |  Bin 0 -> 2316 bytes
 ...Norm2AllModes$Norm2AllModesSingleton.class |  Bin 0 -> 1366 bytes
 .../Norm2AllModes$Normalizer2WithImpl.class   |  Bin 0 -> 2933 bytes
 .../jdk/internal/icu/impl/Norm2AllModes.class |  Bin 0 -> 2129 bytes
 .../jdk/internal/icu/impl/Norm2AllModes.java  |  292 +
 .../icu/impl/NormalizerImpl$Hangul.class      |  Bin 0 -> 1555 bytes
 .../impl/NormalizerImpl$IsAcceptable.class    |  Bin 0 -> 711 bytes
 .../icu/impl/NormalizerImpl$NextCCArgs.class  |  Bin 0 -> 525 bytes
 .../icu/impl/NormalizerImpl$PrevArgs.class    |  Bin 0 -> 519 bytes
 .../NormalizerImpl$ReorderingBuffer.class     |  Bin 0 -> 6071 bytes
 .../icu/impl/NormalizerImpl$UTF16Plus.class   |  Bin 0 -> 1068 bytes
 .../internal/icu/impl/NormalizerImpl.class    |  Bin 0 -> 29273 bytes
 .../jdk/internal/icu/impl/NormalizerImpl.java | 2193 ++++++++
 .../std/jdk/internal/icu/impl/Punycode.class  |  Bin 0 -> 7330 bytes
 .../std/jdk/internal/icu/impl/Punycode.java   |  513 ++
 .../impl/ReplaceableUCharacterIterator.class  |  Bin 0 -> 2305 bytes
 .../impl/ReplaceableUCharacterIterator.java   |  190 +
 .../icu/impl/StringPrepDataReader.class       |  Bin 0 -> 1886 bytes
 .../icu/impl/StringPrepDataReader.java        |  128 +
 .../icu/impl/Trie$DataManipulate.class        |  Bin 0 -> 259 bytes
 .../impl/Trie$DefaultGetFoldingOffset.class   |  Bin 0 -> 617 bytes
 .../std/jdk/internal/icu/impl/Trie.class      |  Bin 0 -> 3338 bytes
 .../std/jdk/internal/icu/impl/Trie.java       |  367 ++
 .../std/jdk/internal/icu/impl/Trie2$1.class   |  Bin 0 -> 558 bytes
 .../jdk/internal/icu/impl/Trie2$Range.class   |  Bin 0 -> 1128 bytes
 .../icu/impl/Trie2$Trie2Iterator.class        |  Bin 0 -> 2584 bytes
 .../icu/impl/Trie2$UTrie2Header.class         |  Bin 0 -> 579 bytes
 .../internal/icu/impl/Trie2$ValueMapper.class |  Bin 0 -> 243 bytes
 .../std/jdk/internal/icu/impl/Trie2.class     |  Bin 0 -> 5212 bytes
 .../std/jdk/internal/icu/impl/Trie2.java      |  655 +++
 .../std/jdk/internal/icu/impl/Trie2_16.class  |  Bin 0 -> 1995 bytes
 .../std/jdk/internal/icu/impl/Trie2_16.java   |  167 +
 .../icu/impl/UBiDiProps$IsAcceptable.class    |  Bin 0 -> 695 bytes
 .../jdk/internal/icu/impl/UBiDiProps.class    |  Bin 0 -> 4985 bytes
 .../std/jdk/internal/icu/impl/UBiDiProps.java |  274 +
 .../icu/impl/UCharacterProperty$1.class       |  Bin 0 -> 883 bytes
 .../UCharacterProperty$BiDiIntProperty.class  |  Bin 0 -> 654 bytes
 ...erProperty$CombiningClassIntProperty.class |  Bin 0 -> 663 bytes
 .../impl/UCharacterProperty$IntProperty.class |  Bin 0 -> 1087 bytes
 .../UCharacterProperty$IsAcceptable.class     |  Bin 0 -> 728 bytes
 ...erProperty$NormQuickCheckIntProperty.class |  Bin 0 -> 811 bytes
 .../icu/impl/UCharacterProperty.class         |  Bin 0 -> 9352 bytes
 .../internal/icu/impl/UCharacterProperty.java |  629 +++
 .../UnicodeSetStringSpan$OffsetList.class     |  Bin 0 -> 2739 bytes
 .../icu/impl/UnicodeSetStringSpan.class       |  Bin 0 -> 11894 bytes
 .../icu/impl/UnicodeSetStringSpan.java        | 1175 ++++
 .../std/jdk/internal/icu/impl/Utility.class   |  Bin 0 -> 4694 bytes
 .../std/jdk/internal/icu/impl/Utility.java    |  276 +
 .../internal/icu/impl/data/icudt74b/nfc.nrm   |  Bin 0 -> 35392 bytes
 .../internal/icu/impl/data/icudt74b/nfkc.nrm  |  Bin 0 -> 55120 bytes
 .../internal/icu/impl/data/icudt74b/ubidi.icu |  Bin 0 -> 27584 bytes
 .../icu/impl/data/icudt74b/uprops.icu         |  Bin 0 -> 141616 bytes
 .../lang/UCharacter$HangulSyllableType.class  |  Bin 0 -> 516 bytes
 .../icu/lang/UCharacter$JoiningGroup.class    |  Bin 0 -> 299 bytes
 .../icu/lang/UCharacter$NumericType.class     |  Bin 0 -> 405 bytes
 .../jdk/internal/icu/lang/UCharacter.class    |  Bin 0 -> 2897 bytes
 .../std/jdk/internal/icu/lang/UCharacter.java |  545 ++
 .../icu/lang/UCharacterDirection.class        |  Bin 0 -> 1352 bytes
 .../icu/lang/UCharacterDirection.java         |  113 +
 .../UCharacterEnums$ECharacterCategory.class  |  Bin 0 -> 1731 bytes
 .../UCharacterEnums$ECharacterDirection.class |  Bin 0 -> 2642 bytes
 .../internal/icu/lang/UCharacterEnums.class   |  Bin 0 -> 631 bytes
 .../internal/icu/lang/UCharacterEnums.java    |  588 ++
 .../text/BidiBase$BidiPairedBracketType.class |  Bin 0 -> 385 bytes
 .../icu/text/BidiBase$BracketData.class       |  Bin 0 -> 765 bytes
 .../icu/text/BidiBase$ImpTabPair.class        |  Bin 0 -> 631 bytes
 .../icu/text/BidiBase$InsertPoints.class      |  Bin 0 -> 598 bytes
 .../internal/icu/text/BidiBase$IsoRun.class   |  Bin 0 -> 544 bytes
 .../internal/icu/text/BidiBase$Isolate.class  |  Bin 0 -> 483 bytes
 .../internal/icu/text/BidiBase$LevState.class |  Bin 0 -> 581 bytes
 .../icu/text/BidiBase$NumericShapings.class   |  Bin 0 -> 1182 bytes
 .../internal/icu/text/BidiBase$Opening.class  |  Bin 0 -> 510 bytes
 .../internal/icu/text/BidiBase$Point.class    |  Bin 0 -> 432 bytes
 .../BidiBase$TextAttributeConstants$1.class   |  Bin 0 -> 796 bytes
 .../BidiBase$TextAttributeConstants.class     |  Bin 0 -> 1863 bytes
 .../std/jdk/internal/icu/text/BidiBase.class  |  Bin 0 -> 49751 bytes
 .../std/jdk/internal/icu/text/BidiBase.java   | 4783 +++++++++++++++++
 .../std/jdk/internal/icu/text/BidiLine.class  |  Bin 0 -> 9731 bytes
 .../std/jdk/internal/icu/text/BidiLine.java   |  836 +++
 .../std/jdk/internal/icu/text/BidiRun.class   |  Bin 0 -> 946 bytes
 .../std/jdk/internal/icu/text/BidiRun.java    |  124 +
 .../jdk/internal/icu/text/BidiWriter.class    |  Bin 0 -> 5478 bytes
 .../std/jdk/internal/icu/text/BidiWriter.java |  451 ++
 .../icu/text/FilteredNormalizer2.class        |  Bin 0 -> 4898 bytes
 .../icu/text/FilteredNormalizer2.java         |  266 +
 .../jdk/internal/icu/text/Normalizer2.class   |  Bin 0 -> 2354 bytes
 .../jdk/internal/icu/text/Normalizer2.java    |  276 +
 .../internal/icu/text/NormalizerBase$1.class  |  Bin 0 -> 848 bytes
 .../icu/text/NormalizerBase$Mode.class        |  Bin 0 -> 592 bytes
 .../icu/text/NormalizerBase$ModeImpl.class    |  Bin 0 -> 571 bytes
 .../text/NormalizerBase$NFC32ModeImpl.class   |  Bin 0 -> 1085 bytes
 .../icu/text/NormalizerBase$NFCMode.class     |  Bin 0 -> 1074 bytes
 .../icu/text/NormalizerBase$NFCModeImpl.class |  Bin 0 -> 810 bytes
 .../text/NormalizerBase$NFD32ModeImpl.class   |  Bin 0 -> 1085 bytes
 .../icu/text/NormalizerBase$NFDMode.class     |  Bin 0 -> 1074 bytes
 .../icu/text/NormalizerBase$NFDModeImpl.class |  Bin 0 -> 810 bytes
 .../text/NormalizerBase$NFKC32ModeImpl.class  |  Bin 0 -> 1089 bytes
 .../icu/text/NormalizerBase$NFKCMode.class    |  Bin 0 -> 1081 bytes
 .../text/NormalizerBase$NFKCModeImpl.class    |  Bin 0 -> 814 bytes
 .../text/NormalizerBase$NFKD32ModeImpl.class  |  Bin 0 -> 1089 bytes
 .../icu/text/NormalizerBase$NFKDMode.class    |  Bin 0 -> 1081 bytes
 .../text/NormalizerBase$NFKDModeImpl.class    |  Bin 0 -> 814 bytes
 .../icu/text/NormalizerBase$NONEMode.class    |  Bin 0 -> 823 bytes
 .../icu/text/NormalizerBase$Unicode32.class   |  Bin 0 -> 713 bytes
 .../internal/icu/text/NormalizerBase.class    |  Bin 0 -> 9245 bytes
 .../jdk/internal/icu/text/NormalizerBase.java |  784 +++
 .../jdk/internal/icu/text/Replaceable.class   |  Bin 0 -> 202 bytes
 .../jdk/internal/icu/text/Replaceable.java    |  121 +
 .../internal/icu/text/ReplaceableString.class |  Bin 0 -> 1071 bytes
 .../internal/icu/text/ReplaceableString.java  |  118 +
 .../text/StringPrep$StringPrepTrieImpl.class  |  Bin 0 -> 732 bytes
 .../internal/icu/text/StringPrep$Values.class |  Bin 0 -> 589 bytes
 .../jdk/internal/icu/text/StringPrep.class    |  Bin 0 -> 7637 bytes
 .../std/jdk/internal/icu/text/StringPrep.java |  485 ++
 .../icu/text/UCharacterIterator.class         |  Bin 0 -> 2681 bytes
 .../internal/icu/text/UCharacterIterator.java |  317 ++
 .../std/jdk/internal/icu/text/UTF16.class     |  Bin 0 -> 5220 bytes
 .../std/jdk/internal/icu/text/UTF16.java      |  621 +++
 .../internal/icu/text/UnicodeSet$Filter.class |  Bin 0 -> 253 bytes
 .../icu/text/UnicodeSet$SpanCondition.class   |  Bin 0 -> 1367 bytes
 .../icu/text/UnicodeSet$VersionFilter.class   |  Bin 0 -> 1020 bytes
 .../jdk/internal/icu/text/UnicodeSet.class    |  Bin 0 -> 14311 bytes
 .../std/jdk/internal/icu/text/UnicodeSet.java | 1412 +++++
 .../icu/util/CodePointMap$Range.class         |  Bin 0 -> 871 bytes
 .../icu/util/CodePointMap$RangeIterator.class |  Bin 0 -> 1639 bytes
 .../icu/util/CodePointMap$RangeOption.class   |  Bin 0 -> 1388 bytes
 .../util/CodePointMap$StringIterator.class    |  Bin 0 -> 1883 bytes
 .../icu/util/CodePointMap$ValueFilter.class   |  Bin 0 -> 266 bytes
 .../jdk/internal/icu/util/CodePointMap.class  |  Bin 0 -> 2682 bytes
 .../jdk/internal/icu/util/CodePointMap.java   |  475 ++
 .../icu/util/CodePointTrie$Data.class         |  Bin 0 -> 722 bytes
 .../icu/util/CodePointTrie$Data16.class       |  Bin 0 -> 1334 bytes
 .../icu/util/CodePointTrie$Data32.class       |  Bin 0 -> 1329 bytes
 .../icu/util/CodePointTrie$Data8.class        |  Bin 0 -> 1332 bytes
 ...odePointTrie$Fast$FastStringIterator.class |  Bin 0 -> 2528 bytes
 .../icu/util/CodePointTrie$Fast.class         |  Bin 0 -> 2398 bytes
 .../icu/util/CodePointTrie$Fast16.class       |  Bin 0 -> 2184 bytes
 .../icu/util/CodePointTrie$Fast32.class       |  Bin 0 -> 2189 bytes
 .../icu/util/CodePointTrie$Fast8.class        |  Bin 0 -> 2193 bytes
 ...ePointTrie$Small$SmallStringIterator.class |  Bin 0 -> 2536 bytes
 .../icu/util/CodePointTrie$Small.class        |  Bin 0 -> 2368 bytes
 .../icu/util/CodePointTrie$Small16.class      |  Bin 0 -> 1429 bytes
 .../icu/util/CodePointTrie$Small32.class      |  Bin 0 -> 1434 bytes
 .../icu/util/CodePointTrie$Small8.class       |  Bin 0 -> 1426 bytes
 .../icu/util/CodePointTrie$Type.class         |  Bin 0 -> 1262 bytes
 .../icu/util/CodePointTrie$ValueWidth.class   |  Bin 0 -> 1362 bytes
 .../jdk/internal/icu/util/CodePointTrie.class |  Bin 0 -> 11830 bytes
 .../jdk/internal/icu/util/CodePointTrie.java  | 1266 +++++
 .../std/jdk/internal/icu/util/OutputInt.class |  Bin 0 -> 316 bytes
 .../std/jdk/internal/icu/util/OutputInt.java  |   50 +
 .../jdk/internal/icu/util/VersionInfo.class   |  Bin 0 -> 2813 bytes
 .../jdk/internal/icu/util/VersionInfo.java    |  203 +
 .../std/jdk/internal/io/JdkConsole.class      |  Bin 0 -> 745 bytes
 .../std/jdk/internal/io/JdkConsole.java       |   51 +
 .../jdk/internal/io/JdkConsoleImpl$1.class    |  Bin 0 -> 954 bytes
 .../jdk/internal/io/JdkConsoleImpl$2.class    |  Bin 0 -> 755 bytes
 .../io/JdkConsoleImpl$LineReader.class        |  Bin 0 -> 2453 bytes
 .../std/jdk/internal/io/JdkConsoleImpl.class  |  Bin 0 -> 7822 bytes
 .../std/jdk/internal/io/JdkConsoleImpl.java   |  407 ++
 .../jdk/internal/io/JdkConsoleProvider.class  |  Bin 0 -> 316 bytes
 .../jdk/internal/io/JdkConsoleProvider.java   |   44 +
 .../std/jdk/internal/javac/NoPreview.class    |  Bin 0 -> 461 bytes
 .../std/jdk/internal/javac/NoPreview.java     |   49 +
 .../javac/ParticipatesInPreview.class         |  Bin 0 -> 412 bytes
 .../internal/javac/ParticipatesInPreview.java |   39 +
 .../javac/PreviewFeature$Feature.class        |  Bin 0 -> 2489 bytes
 .../internal/javac/PreviewFeature$JEP.class   |  Bin 0 -> 628 bytes
 .../jdk/internal/javac/PreviewFeature.class   |  Bin 0 -> 769 bytes
 .../jdk/internal/javac/PreviewFeature.java    |  106 +
 .../std/jdk/internal/javac/Restricted.class   |  Bin 0 -> 392 bytes
 .../std/jdk/internal/javac/Restricted.java    |   39 +
 .../internal/jimage/BasicImageReader$1.class  |  Bin 0 -> 1283 bytes
 .../internal/jimage/BasicImageReader$2.class  |  Bin 0 -> 1894 bytes
 .../internal/jimage/BasicImageReader.class    |  Bin 0 -> 14703 bytes
 .../jdk/internal/jimage/BasicImageReader.java |  467 ++
 .../internal/jimage/ImageBufferCache$1.class  |  Bin 0 -> 950 bytes
 .../internal/jimage/ImageBufferCache$2.class  |  Bin 0 -> 1465 bytes
 .../internal/jimage/ImageBufferCache.class    |  Bin 0 -> 3915 bytes
 .../jdk/internal/jimage/ImageBufferCache.java |  158 +
 .../std/jdk/internal/jimage/ImageHeader.class |  Bin 0 -> 3953 bytes
 .../std/jdk/internal/jimage/ImageHeader.java  |  183 +
 .../jdk/internal/jimage/ImageLocation.class   |  Bin 0 -> 7599 bytes
 .../jdk/internal/jimage/ImageLocation.java    |  369 ++
 .../jimage/ImageReader$Directory.class        |  Bin 0 -> 2983 bytes
 .../jimage/ImageReader$LinkNode.class         |  Bin 0 -> 1611 bytes
 .../internal/jimage/ImageReader$Node.class    |  Bin 0 -> 4056 bytes
 .../jimage/ImageReader$Resource.class         |  Bin 0 -> 2055 bytes
 ...er$SharedImageReader$LocationVisitor.class |  Bin 0 -> 402 bytes
 .../ImageReader$SharedImageReader.class       |  Bin 0 -> 14138 bytes
 .../std/jdk/internal/jimage/ImageReader.class |  Bin 0 -> 6964 bytes
 .../std/jdk/internal/jimage/ImageReader.java  |  858 +++
 .../jimage/ImageReaderFactory$1.class         |  Bin 0 -> 1185 bytes
 .../internal/jimage/ImageReaderFactory.class  |  Bin 0 -> 2100 bytes
 .../internal/jimage/ImageReaderFactory.java   |   90 +
 .../std/jdk/internal/jimage/ImageStream.class |  Bin 0 -> 5042 bytes
 .../std/jdk/internal/jimage/ImageStream.java  |  207 +
 .../jdk/internal/jimage/ImageStrings.class    |  Bin 0 -> 547 bytes
 .../std/jdk/internal/jimage/ImageStrings.java |   49 +
 .../internal/jimage/ImageStringsReader.class  |  Bin 0 -> 7256 bytes
 .../internal/jimage/ImageStringsReader.java   |  387 ++
 .../internal/jimage/NativeImageBuffer$1.class |  Bin 0 -> 840 bytes
 .../internal/jimage/NativeImageBuffer.class   |  Bin 0 -> 669 bytes
 .../internal/jimage/NativeImageBuffer.java    |   49 +
 .../jimage/decompressor/CompressIndexes.class |  Bin 0 -> 2550 bytes
 .../jimage/decompressor/CompressIndexes.java  |  136 +
 .../CompressedResourceHeader.class            |  Bin 0 -> 2656 bytes
 .../CompressedResourceHeader.java             |  124 +
 .../jimage/decompressor/Decompressor.class    |  Bin 0 -> 2886 bytes
 .../jimage/decompressor/Decompressor.java     |   93 +
 ...ResourceDecompressor$StringsProvider.class |  Bin 0 -> 341 bytes
 .../decompressor/ResourceDecompressor.class   |  Bin 0 -> 494 bytes
 .../decompressor/ResourceDecompressor.java    |   59 +
 .../ResourceDecompressorFactory.class         |  Bin 0 -> 693 bytes
 .../ResourceDecompressorFactory.java          |   62 +
 .../ResourceDecompressorRepository.class      |  Bin 0 -> 1735 bytes
 .../ResourceDecompressorRepository.java       |   74 +
 .../SignatureParser$ParseResult.class         |  Bin 0 -> 672 bytes
 .../jimage/decompressor/SignatureParser.class |  Bin 0 -> 2638 bytes
 .../jimage/decompressor/SignatureParser.java  |  129 +
 .../StringSharingDecompressor.class           |  Bin 0 -> 6780 bytes
 .../StringSharingDecompressor.java            |  237 +
 .../StringSharingDecompressorFactory.class    |  Bin 0 -> 801 bytes
 .../StringSharingDecompressorFactory.java     |   51 +
 .../jimage/decompressor/ZipDecompressor.class |  Bin 0 -> 1829 bytes
 .../jimage/decompressor/ZipDecompressor.java  |   76 +
 .../decompressor/ZipDecompressorFactory.class |  Bin 0 -> 754 bytes
 .../decompressor/ZipDecompressorFactory.java  |   50 +
 .../jdk/internal/jmod/JmodFile$Entry.class    |  Bin 0 -> 3403 bytes
 .../jdk/internal/jmod/JmodFile$Section.class  |  Bin 0 -> 1812 bytes
 .../std/jdk/internal/jmod/JmodFile.class      |  Bin 0 -> 4612 bytes
 .../std/jdk/internal/jmod/JmodFile.java       |  240 +
 .../jrtfs/ExplodedImage$PathNode.class        |  Bin 0 -> 4932 bytes
 .../jdk/internal/jrtfs/ExplodedImage.class    |  Bin 0 -> 9393 bytes
 .../std/jdk/internal/jrtfs/ExplodedImage.java |  308 ++
 .../internal/jrtfs/JrtDirectoryStream$1.class |  Bin 0 -> 1394 bytes
 .../internal/jrtfs/JrtDirectoryStream.class   |  Bin 0 -> 2361 bytes
 .../internal/jrtfs/JrtDirectoryStream.java    |  100 +
 .../jrtfs/JrtFileAttributeView$AttrID.class   |  Bin 0 -> 1857 bytes
 .../internal/jrtfs/JrtFileAttributeView.class |  Bin 0 -> 6140 bytes
 .../internal/jrtfs/JrtFileAttributeView.java  |  198 +
 .../internal/jrtfs/JrtFileAttributes.class    |  Bin 0 -> 3347 bytes
 .../jdk/internal/jrtfs/JrtFileAttributes.java |  141 +
 .../std/jdk/internal/jrtfs/JrtFileStore.class |  Bin 0 -> 2816 bytes
 .../std/jdk/internal/jrtfs/JrtFileStore.java  |  104 +
 .../jdk/internal/jrtfs/JrtFileSystem$1.class  |  Bin 0 -> 2060 bytes
 .../jdk/internal/jrtfs/JrtFileSystem.class    |  Bin 0 -> 16620 bytes
 .../std/jdk/internal/jrtfs/JrtFileSystem.java |  491 ++
 .../jrtfs/JrtFileSystemProvider$1.class       |  Bin 0 -> 1033 bytes
 .../JrtFileSystemProvider$JrtFsLoader.class   |  Bin 0 -> 1574 bytes
 .../jrtfs/JrtFileSystemProvider.class         |  Bin 0 -> 13539 bytes
 .../internal/jrtfs/JrtFileSystemProvider.java |  358 ++
 .../std/jdk/internal/jrtfs/JrtPath$1.class    |  Bin 0 -> 1391 bytes
 .../std/jdk/internal/jrtfs/JrtPath$2.class    |  Bin 0 -> 737 bytes
 .../std/jdk/internal/jrtfs/JrtPath.class      |  Bin 0 -> 26375 bytes
 .../std/jdk/internal/jrtfs/JrtPath.java       |  949 ++++
 .../std/jdk/internal/jrtfs/JrtUtils.class     |  Bin 0 -> 2803 bytes
 .../std/jdk/internal/jrtfs/JrtUtils.java      |  194 +
 .../jdk/internal/jrtfs/SystemImage$1.class    |  Bin 0 -> 1176 bytes
 .../jdk/internal/jrtfs/SystemImage$2.class    |  Bin 0 -> 993 bytes
 .../std/jdk/internal/jrtfs/SystemImage.class  |  Bin 0 -> 4561 bytes
 .../std/jdk/internal/jrtfs/SystemImage.java   |  131 +
 ...emoizer$RecursiveInvocationException.class |  Bin 0 -> 751 bytes
 .../AbstractClassLoaderValue$Memoizer.class   |  Bin 0 -> 2558 bytes
 .../loader/AbstractClassLoaderValue$Sub.class |  Bin 0 -> 2421 bytes
 .../loader/AbstractClassLoaderValue.class     |  Bin 0 -> 5623 bytes
 .../loader/AbstractClassLoaderValue.java      |  434 ++
 .../loader/ArchivedClassLoaders.class         |  Bin 0 -> 2011 bytes
 .../internal/loader/ArchivedClassLoaders.java |   96 +
 .../jdk/internal/loader/BootLoader$1.class    |  Bin 0 -> 1018 bytes
 .../loader/BootLoader$PackageHelper$1.class   |  Bin 0 -> 1461 bytes
 .../loader/BootLoader$PackageHelper$2.class   |  Bin 0 -> 2028 bytes
 .../loader/BootLoader$PackageHelper.class     |  Bin 0 -> 4163 bytes
 .../std/jdk/internal/loader/BootLoader.class  |  Bin 0 -> 6355 bytes
 .../std/jdk/internal/loader/BootLoader.java   |  348 ++
 .../loader/BuiltinClassLoader$1.class         |  Bin 0 -> 1876 bytes
 .../loader/BuiltinClassLoader$2.class         |  Bin 0 -> 2474 bytes
 .../loader/BuiltinClassLoader$3.class         |  Bin 0 -> 1609 bytes
 .../loader/BuiltinClassLoader$4.class         |  Bin 0 -> 1627 bytes
 .../loader/BuiltinClassLoader$5.class         |  Bin 0 -> 1484 bytes
 .../BuiltinClassLoader$LoadedModule.class     |  Bin 0 -> 2191 bytes
 .../BuiltinClassLoader$NullModuleReader.class |  Bin 0 -> 1153 bytes
 .../internal/loader/BuiltinClassLoader.class  |  Bin 0 -> 22077 bytes
 .../internal/loader/BuiltinClassLoader.java   | 1088 ++++
 .../internal/loader/ClassLoaderHelper.class   |  Bin 0 -> 2162 bytes
 .../internal/loader/ClassLoaderHelper.java    |   90 +
 .../internal/loader/ClassLoaderValue.class    |  Bin 0 -> 1373 bytes
 .../jdk/internal/loader/ClassLoaderValue.java |  102 +
 .../loader/ClassLoaders$AppClassLoader.class  |  Bin 0 -> 2680 bytes
 .../loader/ClassLoaders$BootClassLoader.class |  Bin 0 -> 1074 bytes
 .../ClassLoaders$PlatformClassLoader.class    |  Bin 0 -> 1008 bytes
 .../jdk/internal/loader/ClassLoaders.class    |  Bin 0 -> 3947 bytes
 .../std/jdk/internal/loader/ClassLoaders.java |  239 +
 .../jdk/internal/loader/FileURLMapper.class   |  Bin 0 -> 1161 bytes
 .../jdk/internal/loader/FileURLMapper.java    |   81 +
 .../std/jdk/internal/loader/Loader$1.class    |  Bin 0 -> 1816 bytes
 .../std/jdk/internal/loader/Loader$2.class    |  Bin 0 -> 1172 bytes
 .../std/jdk/internal/loader/Loader$3.class    |  Bin 0 -> 1493 bytes
 .../internal/loader/Loader$LoadedModule.class |  Bin 0 -> 1713 bytes
 .../loader/Loader$NullModuleReader.class      |  Bin 0 -> 1105 bytes
 .../std/jdk/internal/loader/Loader.class      |  Bin 0 -> 20237 bytes
 .../std/jdk/internal/loader/Loader.java       |  736 +++
 .../std/jdk/internal/loader/LoaderPool.class  |  Bin 0 -> 3506 bytes
 .../std/jdk/internal/loader/LoaderPool.java   |   85 +
 .../internal/loader/NativeLibraries$1.class   |  Bin 0 -> 1300 bytes
 .../internal/loader/NativeLibraries$2.class   |  Bin 0 -> 1366 bytes
 .../internal/loader/NativeLibraries$3.class   |  Bin 0 -> 1415 bytes
 .../loader/NativeLibraries$CountedLock.class  |  Bin 0 -> 918 bytes
 .../loader/NativeLibraries$LibraryPaths.class |  Bin 0 -> 824 bytes
 ...tiveLibraries$NativeLibraryContext$1.class |  Bin 0 -> 1356 bytes
 ...NativeLibraries$NativeLibraryContext.class |  Bin 0 -> 2271 bytes
 .../NativeLibraries$NativeLibraryImpl$1.class |  Bin 0 -> 1331 bytes
 .../NativeLibraries$NativeLibraryImpl.class   |  Bin 0 -> 2444 bytes
 .../loader/NativeLibraries$Unloader.class     |  Bin 0 -> 2088 bytes
 .../jdk/internal/loader/NativeLibraries.class |  Bin 0 -> 8861 bytes
 .../jdk/internal/loader/NativeLibraries.java  |  551 ++
 .../jdk/internal/loader/NativeLibrary.class   |  Bin 0 -> 916 bytes
 .../jdk/internal/loader/NativeLibrary.java    |   61 +
 .../loader/RawNativeLibraries$1.class         |  Bin 0 -> 1325 bytes
 ...NativeLibraries$RawNativeLibraryImpl.class |  Bin 0 -> 1444 bytes
 .../internal/loader/RawNativeLibraries.class  |  Bin 0 -> 3516 bytes
 .../internal/loader/RawNativeLibraries.java   |  194 +
 .../std/jdk/internal/loader/Resource.class    |  Bin 0 -> 2849 bytes
 .../std/jdk/internal/loader/Resource.java     |  198 +
 .../jdk/internal/loader/URLClassPath$1.class  |  Bin 0 -> 1782 bytes
 .../jdk/internal/loader/URLClassPath$2.class  |  Bin 0 -> 1844 bytes
 .../jdk/internal/loader/URLClassPath$3.class  |  Bin 0 -> 2308 bytes
 .../loader/URLClassPath$FileLoader$1.class    |  Bin 0 -> 1634 bytes
 .../loader/URLClassPath$FileLoader.class      |  Bin 0 -> 2524 bytes
 .../loader/URLClassPath$JarLoader$1.class     |  Bin 0 -> 1763 bytes
 .../loader/URLClassPath$JarLoader$2.class     |  Bin 0 -> 2977 bytes
 .../loader/URLClassPath$JarLoader.class       |  Bin 0 -> 9451 bytes
 .../loader/URLClassPath$Loader$1.class        |  Bin 0 -> 1563 bytes
 .../internal/loader/URLClassPath$Loader.class |  Bin 0 -> 3196 bytes
 .../jdk/internal/loader/URLClassPath.class    |  Bin 0 -> 12099 bytes
 .../std/jdk/internal/loader/URLClassPath.java | 1092 ++++
 .../logger/AbstractLoggerWrapper.class        |  Bin 0 -> 12162 bytes
 .../logger/AbstractLoggerWrapper.java         |  380 ++
 ...BootstrapLogger$BootstrapExecutors$1.class |  Bin 0 -> 1900 bytes
 ...Executors$BootstrapMessageLoggerTask.class |  Bin 0 -> 1035 bytes
 .../BootstrapLogger$BootstrapExecutors.class  |  Bin 0 -> 5054 bytes
 .../BootstrapLogger$DetectBackend$1.class     |  Bin 0 -> 2274 bytes
 .../BootstrapLogger$DetectBackend.class       |  Bin 0 -> 873 bytes
 .../logger/BootstrapLogger$LogEvent.class     |  Bin 0 -> 14099 bytes
 .../BootstrapLogger$LoggingBackend.class      |  Bin 0 -> 1564 bytes
 .../BootstrapLogger$RedirectedLoggers.class   |  Bin 0 -> 3795 bytes
 .../jdk/internal/logger/BootstrapLogger.class |  Bin 0 -> 16664 bytes
 .../jdk/internal/logger/BootstrapLogger.java  | 1105 ++++
 .../logger/DefaultLoggerFinder$1.class        |  Bin 0 -> 1124 bytes
 .../DefaultLoggerFinder$SharedLoggers.class   |  Bin 0 -> 2532 bytes
 .../internal/logger/DefaultLoggerFinder.class |  Bin 0 -> 3312 bytes
 .../internal/logger/DefaultLoggerFinder.java  |  191 +
 .../jdk/internal/logger/LazyLoggers$1.class   |  Bin 0 -> 1119 bytes
 .../logger/LazyLoggers$JdkLazyLogger.class    |  Bin 0 -> 1381 bytes
 .../LazyLoggers$LazyLoggerAccessor.class      |  Bin 0 -> 7062 bytes
 .../LazyLoggers$LazyLoggerFactories.class     |  Bin 0 -> 1461 bytes
 .../LazyLoggers$LazyLoggerWrapper.class       |  Bin 0 -> 1713 bytes
 .../logger/LazyLoggers$LoggerAccessor.class   |  Bin 0 -> 567 bytes
 .../std/jdk/internal/logger/LazyLoggers.class |  Bin 0 -> 4666 bytes
 .../std/jdk/internal/logger/LazyLoggers.java  |  469 ++
 .../logger/LocalizedLoggerWrapper.class       |  Bin 0 -> 5445 bytes
 .../logger/LocalizedLoggerWrapper.java        |  155 +
 .../LoggerFinderLoader$ErrorPolicy.class      |  Bin 0 -> 1428 bytes
 ...FinderLoader$TemporaryLoggerFinder$1.class |  Bin 0 -> 738 bytes
 ...erFinderLoader$TemporaryLoggerFinder.class |  Bin 0 -> 1740 bytes
 .../internal/logger/LoggerFinderLoader.class  |  Bin 0 -> 7519 bytes
 .../internal/logger/LoggerFinderLoader.java   |  267 +
 .../jdk/internal/logger/LoggerWrapper.class   |  Bin 0 -> 7179 bytes
 .../jdk/internal/logger/LoggerWrapper.java    |   65 +
 .../SimpleConsoleLogger$CallerFinder$1.class  |  Bin 0 -> 1111 bytes
 .../SimpleConsoleLogger$CallerFinder.class    |  Bin 0 -> 3257 bytes
 .../SimpleConsoleLogger$Formatting.class      |  Bin 0 -> 4203 bytes
 .../internal/logger/SimpleConsoleLogger.class |  Bin 0 -> 12835 bytes
 .../internal/logger/SimpleConsoleLogger.java  |  557 ++
 .../jdk/internal/logger/SurrogateLogger.class |  Bin 0 -> 2056 bytes
 .../jdk/internal/logger/SurrogateLogger.java  |   72 +
 .../std/jdk/internal/logger/package-info.java |   68 +
 .../std/jdk/internal/math/DoubleConsts.class  |  Bin 0 -> 670 bytes
 .../std/jdk/internal/math/DoubleConsts.java   |   95 +
 .../jdk/internal/math/DoubleToDecimal.class   |  Bin 0 -> 7933 bytes
 .../jdk/internal/math/DoubleToDecimal.java    |  559 ++
 .../std/jdk/internal/math/FDBigInteger.class  |  Bin 0 -> 16884 bytes
 .../std/jdk/internal/math/FDBigInteger.java   | 1521 ++++++
 .../std/jdk/internal/math/FloatConsts.class   |  Bin 0 -> 646 bytes
 .../std/jdk/internal/math/FloatConsts.java    |   95 +
 .../jdk/internal/math/FloatToDecimal.class    |  Bin 0 -> 6828 bytes
 .../std/jdk/internal/math/FloatToDecimal.java |  502 ++
 .../jdk/internal/math/FloatingDecimal$1.class |  Bin 0 -> 862 bytes
 .../FloatingDecimal$ASCIIToBinaryBuffer.class |  Bin 0 -> 8383 bytes
 ...oatingDecimal$ASCIIToBinaryConverter.class |  Bin 0 -> 321 bytes
 .../FloatingDecimal$BinaryToASCIIBuffer.class |  Bin 0 -> 10748 bytes
 ...oatingDecimal$BinaryToASCIIConverter.class |  Bin 0 -> 534 bytes
 ...cimal$ExceptionalBinaryToASCIIBuffer.class |  Bin 0 -> 2228 bytes
 .../FloatingDecimal$HexFloatPattern.class     |  Bin 0 -> 753 bytes
 ...gDecimal$PreparedASCIIToBinaryBuffer.class |  Bin 0 -> 856 bytes
 .../jdk/internal/math/FloatingDecimal.class   |  Bin 0 -> 13417 bytes
 .../jdk/internal/math/FloatingDecimal.java    | 2551 +++++++++
 .../internal/math/FormattedFPDecimal.class    |  Bin 0 -> 4605 bytes
 .../jdk/internal/math/FormattedFPDecimal.java |  320 ++
 .../std/jdk/internal/math/MathUtils.class     |  Bin 0 -> 22080 bytes
 .../std/jdk/internal/math/MathUtils.java      |  813 +++
 .../std/jdk/internal/misc/Blocker.class       |  Bin 0 -> 1422 bytes
 .../std/jdk/internal/misc/Blocker.java        |   94 +
 .../test_data/std/jdk/internal/misc/CDS.class |  Bin 0 -> 11828 bytes
 .../test_data/std/jdk/internal/misc/CDS.java  |  339 ++
 .../jdk/internal/misc/CarrierThread$1.class   |  Bin 0 -> 1267 bytes
 .../misc/CarrierThread$ForkJoinPools.class    |  Bin 0 -> 1115 bytes
 .../std/jdk/internal/misc/CarrierThread.class |  Bin 0 -> 4253 bytes
 .../std/jdk/internal/misc/CarrierThread.java  |  169 +
 .../internal/misc/CarrierThreadLocal.class    |  Bin 0 -> 1626 bytes
 .../jdk/internal/misc/CarrierThreadLocal.java |   57 +
 .../jdk/internal/misc/ExtendedMapMode.class   |  Bin 0 -> 2777 bytes
 .../jdk/internal/misc/ExtendedMapMode.java    |   68 +
 .../jdk/internal/misc/FileSystemOption.class  |  Bin 0 -> 2567 bytes
 .../jdk/internal/misc/FileSystemOption.java   |   90 +
 .../jdk/internal/misc/InnocuousThread$1.class |  Bin 0 -> 1252 bytes
 .../jdk/internal/misc/InnocuousThread$2.class |  Bin 0 -> 1160 bytes
 .../jdk/internal/misc/InnocuousThread$3.class |  Bin 0 -> 1161 bytes
 .../jdk/internal/misc/InnocuousThread$4.class |  Bin 0 -> 968 bytes
 .../jdk/internal/misc/InnocuousThread.class   |  Bin 0 -> 5881 bytes
 .../jdk/internal/misc/InnocuousThread.java    |  235 +
 .../std/jdk/internal/misc/InternalLock.class  |  Bin 0 -> 1516 bytes
 .../std/jdk/internal/misc/InternalLock.java   |   84 +
 .../std/jdk/internal/misc/MethodFinder.class  |  Bin 0 -> 1766 bytes
 .../std/jdk/internal/misc/MethodFinder.java   |  108 +
 .../std/jdk/internal/misc/OSEnvironment.class |  Bin 0 -> 352 bytes
 .../std/jdk/internal/misc/OSEnvironment.java  |   38 +
 .../jdk/internal/misc/PreviewFeatures.class   |  Bin 0 -> 757 bytes
 .../jdk/internal/misc/PreviewFeatures.java    |   55 +
 .../misc/ScopedMemoryAccess$Scoped.class      |  Bin 0 -> 534 bytes
 ...ScopedMemoryAccess$ScopedAccessError.class |  Bin 0 -> 1160 bytes
 .../internal/misc/ScopedMemoryAccess.class    |  Bin 0 -> 98363 bytes
 .../jdk/internal/misc/ScopedMemoryAccess.java | 4138 ++++++++++++++
 .../std/jdk/internal/misc/Signal$1.class      |  Bin 0 -> 849 bytes
 .../jdk/internal/misc/Signal$Handler.class    |  Bin 0 -> 552 bytes
 .../internal/misc/Signal$NativeHandler.class  |  Bin 0 -> 1155 bytes
 .../std/jdk/internal/misc/Signal.class        |  Bin 0 -> 3919 bytes
 .../std/jdk/internal/misc/Signal.java         |  287 +
 .../misc/TerminatingThreadLocal$1.class       |  Bin 0 -> 1029 bytes
 .../misc/TerminatingThreadLocal.class         |  Bin 0 -> 2247 bytes
 .../internal/misc/TerminatingThreadLocal.java |  106 +
 .../ThreadFlock$ThreadContainerImpl.class     |  Bin 0 -> 3924 bytes
 .../std/jdk/internal/misc/ThreadFlock.class   |  Bin 0 -> 8302 bytes
 .../std/jdk/internal/misc/ThreadFlock.java    |  591 ++
 .../misc/ThreadTracker$ThreadRef.class        |  Bin 0 -> 1573 bytes
 .../std/jdk/internal/misc/ThreadTracker.class |  Bin 0 -> 1971 bytes
 .../std/jdk/internal/misc/ThreadTracker.java  |   93 +
 .../std/jdk/internal/misc/Unsafe.class        |  Bin 0 -> 59478 bytes
 .../std/jdk/internal/misc/Unsafe.java         | 3865 +++++++++++++
 .../jdk/internal/misc/UnsafeConstants.class   |  Bin 0 -> 583 bytes
 .../jdk/internal/misc/UnsafeConstants.java    |  122 +
 .../std/jdk/internal/misc/VM$BufferPool.class |  Bin 0 -> 320 bytes
 .../internal/misc/VM$BufferPoolsHolder.class  |  Bin 0 -> 1348 bytes
 .../test_data/std/jdk/internal/misc/VM.class  |  Bin 0 -> 7547 bytes
 tests/test_data/std/jdk/internal/misc/VM.java |  507 ++
 .../jdk/internal/misc/VirtualThreads.class    |  Bin 0 -> 1458 bytes
 .../std/jdk/internal/misc/VirtualThreads.java |   95 +
 .../internal/module/ArchivedBootLayer.class   |  Bin 0 -> 886 bytes
 .../internal/module/ArchivedBootLayer.java    |   56 +
 .../internal/module/ArchivedModuleGraph.class |  Bin 0 -> 2357 bytes
 .../internal/module/ArchivedModuleGraph.java  |  113 +
 .../std/jdk/internal/module/Builder.class     |  Bin 0 -> 8392 bytes
 .../std/jdk/internal/module/Builder.java      |  282 +
 .../std/jdk/internal/module/Checks.class      |  Bin 0 -> 4401 bytes
 .../std/jdk/internal/module/Checks.java       |  247 +
 .../internal/module/ClassFileConstants.class  |  Bin 0 -> 1132 bytes
 .../internal/module/ClassFileConstants.java   |   60 +
 .../jdk/internal/module/DefaultRoots.class    |  Bin 0 -> 3677 bytes
 .../std/jdk/internal/module/DefaultRoots.java |   81 +
 .../module/ExplodedSystemModules.class        |  Bin 0 -> 1251 bytes
 .../module/ExplodedSystemModules.java         |   71 +
 .../internal/module/ModuleBootstrap$1.class   |  Bin 0 -> 1353 bytes
 .../module/ModuleBootstrap$Counters.class     |  Bin 0 -> 2847 bytes
 .../ModuleBootstrap$SafeModuleFinder.class    |  Bin 0 -> 2917 bytes
 .../jdk/internal/module/ModuleBootstrap.class |  Bin 0 -> 27634 bytes
 .../jdk/internal/module/ModuleBootstrap.java  | 1088 ++++
 .../module/ModuleHashes$Builder.class         |  Bin 0 -> 1359 bytes
 .../module/ModuleHashes$HashSupplier.class    |  Bin 0 -> 285 bytes
 .../jdk/internal/module/ModuleHashes.class    |  Bin 0 -> 8192 bytes
 .../std/jdk/internal/module/ModuleHashes.java |  254 +
 .../ModuleHashesBuilder$Graph$Builder.class   |  Bin 0 -> 2536 bytes
 .../module/ModuleHashesBuilder$Graph.class    |  Bin 0 -> 7303 bytes
 .../ModuleHashesBuilder$TopoSorter.class      |  Bin 0 -> 4148 bytes
 .../internal/module/ModuleHashesBuilder.class |  Bin 0 -> 6602 bytes
 .../internal/module/ModuleHashesBuilder.java  |  287 +
 .../module/ModuleInfo$Attributes.class        |  Bin 0 -> 1332 bytes
 .../ModuleInfo$ConstantPool$Entry.class       |  Bin 0 -> 557 bytes
 .../ModuleInfo$ConstantPool$Index2Entry.class |  Bin 0 -> 693 bytes
 .../ModuleInfo$ConstantPool$IndexEntry.class  |  Bin 0 -> 642 bytes
 .../ModuleInfo$ConstantPool$ValueEntry.class  |  Bin 0 -> 680 bytes
 .../module/ModuleInfo$ConstantPool.class      |  Bin 0 -> 6614 bytes
 .../module/ModuleInfo$CountingDataInput.class |  Bin 0 -> 2930 bytes
 .../module/ModuleInfo$DataInputWrapper.class  |  Bin 0 -> 3381 bytes
 .../std/jdk/internal/module/ModuleInfo.class  |  Bin 0 -> 19332 bytes
 .../std/jdk/internal/module/ModuleInfo.java   | 1227 +++++
 .../internal/module/ModuleInfoExtender.class  |  Bin 0 -> 8193 bytes
 .../internal/module/ModuleInfoExtender.java   |  212 +
 .../module/ModuleLoaderMap$Mapper.class       |  Bin 0 -> 2695 bytes
 .../module/ModuleLoaderMap$Modules.class      |  Bin 0 -> 2329 bytes
 .../jdk/internal/module/ModuleLoaderMap.class |  Bin 0 -> 1525 bytes
 .../jdk/internal/module/ModuleLoaderMap.java  |  239 +
 ...dulePatcher$ExplodedResourceFinder$1.class |  Bin 0 -> 2420 bytes
 ...ModulePatcher$ExplodedResourceFinder.class |  Bin 0 -> 3239 bytes
 .../ModulePatcher$JarResourceFinder$1.class   |  Bin 0 -> 2699 bytes
 .../ModulePatcher$JarResourceFinder.class     |  Bin 0 -> 2569 bytes
 .../ModulePatcher$PatchedModuleReader$1.class |  Bin 0 -> 2139 bytes
 .../ModulePatcher$PatchedModuleReader.class   |  Bin 0 -> 6688 bytes
 .../module/ModulePatcher$ResourceFinder.class |  Bin 0 -> 514 bytes
 .../jdk/internal/module/ModulePatcher.class   |  Bin 0 -> 13680 bytes
 .../jdk/internal/module/ModulePatcher.java    |  604 +++
 .../internal/module/ModulePath$Patterns.class |  Bin 0 -> 878 bytes
 .../std/jdk/internal/module/ModulePath.class  |  Bin 0 -> 25430 bytes
 .../std/jdk/internal/module/ModulePath.java   |  789 +++
 .../internal/module/ModulePathValidator.class |  Bin 0 -> 9040 bytes
 .../internal/module/ModulePathValidator.java  |  254 +
 .../ModuleReferenceImpl$CachedHash.class      |  Bin 0 -> 1735 bytes
 .../internal/module/ModuleReferenceImpl.class |  Bin 0 -> 4727 bytes
 .../internal/module/ModuleReferenceImpl.java  |  200 +
 ...oduleReferences$ExplodedModuleReader.class |  Bin 0 -> 4407 bytes
 .../ModuleReferences$JModModuleReader.class   |  Bin 0 -> 4639 bytes
 .../ModuleReferences$JarModuleReader.class    |  Bin 0 -> 4377 bytes
 ...duleReferences$SafeCloseModuleReader.class |  Bin 0 -> 2375 bytes
 .../internal/module/ModuleReferences.class    |  Bin 0 -> 5303 bytes
 .../jdk/internal/module/ModuleReferences.java |  430 ++
 .../internal/module/ModuleResolution.class    |  Bin 0 -> 2476 bytes
 .../jdk/internal/module/ModuleResolution.java |  113 +
 .../jdk/internal/module/ModuleTarget.class    |  Bin 0 -> 488 bytes
 .../std/jdk/internal/module/ModuleTarget.java |   45 +
 .../std/jdk/internal/module/Modules.class     |  Bin 0 -> 12016 bytes
 .../std/jdk/internal/module/Modules.java      |  301 ++
 .../std/jdk/internal/module/Resources.class   |  Bin 0 -> 3762 bytes
 .../std/jdk/internal/module/Resources.java    |  177 +
 .../ServicesCatalog$ServiceProvider.class     |  Bin 0 -> 1260 bytes
 .../jdk/internal/module/ServicesCatalog.class |  Bin 0 -> 4747 bytes
 .../jdk/internal/module/ServicesCatalog.java  |  186 +
 .../module/SystemModuleFinders$1.class        |  Bin 0 -> 2504 bytes
 .../module/SystemModuleFinders$2.class        |  Bin 0 -> 1403 bytes
 .../module/SystemModuleFinders$3.class        |  Bin 0 -> 875 bytes
 ...duleFinders$ModuleContentSpliterator.class |  Bin 0 -> 3758 bytes
 .../SystemModuleFinders$SystemImage.class     |  Bin 0 -> 734 bytes
 ...stemModuleFinders$SystemModuleFinder.class |  Bin 0 -> 2454 bytes
 ...stemModuleFinders$SystemModuleReader.class |  Bin 0 -> 5803 bytes
 .../internal/module/SystemModuleFinders.class |  Bin 0 -> 11983 bytes
 .../internal/module/SystemModuleFinders.java  |  595 ++
 .../jdk/internal/module/SystemModules$0.class |  Bin 0 -> 69880 bytes
 .../jdk/internal/module/SystemModules$1.class |  Bin 0 -> 69454 bytes
 .../jdk/internal/module/SystemModules$2.class |  Bin 0 -> 69454 bytes
 .../jdk/internal/module/SystemModules$3.class |  Bin 0 -> 69454 bytes
 .../jdk/internal/module/SystemModules$4.class |  Bin 0 -> 69454 bytes
 .../jdk/internal/module/SystemModules$5.class |  Bin 0 -> 69454 bytes
 .../internal/module/SystemModules$all.class   |  Bin 0 -> 80512 bytes
 .../module/SystemModules$default.class        |  Bin 0 -> 73990 bytes
 .../jdk/internal/module/SystemModules.class   |  Bin 0 -> 595 bytes
 .../jdk/internal/module/SystemModules.java    |   86 +
 .../internal/module/SystemModulesMap.class    |  Bin 0 -> 944 bytes
 .../jdk/internal/module/SystemModulesMap.java |   68 +
 .../org/objectweb/asm/AnnotationVisitor.class |  Bin 0 -> 2177 bytes
 .../org/objectweb/asm/AnnotationVisitor.java  |  196 +
 .../org/objectweb/asm/AnnotationWriter.class  |  Bin 0 -> 9750 bytes
 .../org/objectweb/asm/AnnotationWriter.java   |  585 ++
 .../org/objectweb/asm/Attribute$Set.class     |  Bin 0 -> 1679 bytes
 .../org/objectweb/asm/Attribute.class         |  Bin 0 -> 4607 bytes
 .../internal/org/objectweb/asm/Attribute.java |  424 ++
 .../org/objectweb/asm/ByteVector.class        |  Bin 0 -> 5036 bytes
 .../org/objectweb/asm/ByteVector.java         |  405 ++
 .../org/objectweb/asm/ClassReader.class       |  Bin 0 -> 50442 bytes
 .../org/objectweb/asm/ClassReader.java        | 3900 ++++++++++++++
 .../asm/ClassTooLargeException.class          |  Bin 0 -> 978 bytes
 .../objectweb/asm/ClassTooLargeException.java |  104 +
 .../org/objectweb/asm/ClassVisitor.class      |  Bin 0 -> 5148 bytes
 .../org/objectweb/asm/ClassVisitor.java       |  426 ++
 .../org/objectweb/asm/ClassWriter.class       |  Bin 0 -> 19225 bytes
 .../org/objectweb/asm/ClassWriter.java        | 1113 ++++
 .../org/objectweb/asm/ConstantDynamic.class   |  Bin 0 -> 2672 bytes
 .../org/objectweb/asm/ConstantDynamic.java    |  210 +
 .../org/objectweb/asm/Constants.class         |  Bin 0 -> 6912 bytes
 .../internal/org/objectweb/asm/Constants.java |  253 +
 .../internal/org/objectweb/asm/Context.class  |  Bin 0 -> 1161 bytes
 .../internal/org/objectweb/asm/Context.java   |  168 +
 .../org/objectweb/asm/CurrentFrame.class      |  Bin 0 -> 1073 bytes
 .../org/objectweb/asm/CurrentFrame.java       |   87 +
 .../jdk/internal/org/objectweb/asm/Edge.class |  Bin 0 -> 648 bytes
 .../jdk/internal/org/objectweb/asm/Edge.java  |  123 +
 .../org/objectweb/asm/FieldVisitor.class      |  Bin 0 -> 2227 bytes
 .../org/objectweb/asm/FieldVisitor.java       |  179 +
 .../org/objectweb/asm/FieldWriter.class       |  Bin 0 -> 5574 bytes
 .../org/objectweb/asm/FieldWriter.java        |  316 ++
 .../internal/org/objectweb/asm/Frame.class    |  Bin 0 -> 19293 bytes
 .../jdk/internal/org/objectweb/asm/Frame.java | 1522 ++++++
 .../internal/org/objectweb/asm/Handle.class   |  Bin 0 -> 2280 bytes
 .../internal/org/objectweb/asm/Handle.java    |  221 +
 .../internal/org/objectweb/asm/Handler.class  |  Bin 0 -> 2598 bytes
 .../internal/org/objectweb/asm/Handler.java   |  230 +
 .../internal/org/objectweb/asm/Label.class    |  Bin 0 -> 6620 bytes
 .../jdk/internal/org/objectweb/asm/Label.java |  686 +++
 .../asm/MethodTooLargeException.class         |  Bin 0 -> 1287 bytes
 .../asm/MethodTooLargeException.java          |  131 +
 .../org/objectweb/asm/MethodVisitor.class     |  Bin 0 -> 9035 bytes
 .../org/objectweb/asm/MethodVisitor.java      |  827 +++
 .../org/objectweb/asm/MethodWriter.class      |  Bin 0 -> 35956 bytes
 .../org/objectweb/asm/MethodWriter.java       | 2426 +++++++++
 .../org/objectweb/asm/ModuleVisitor.class     |  Bin 0 -> 2476 bytes
 .../org/objectweb/asm/ModuleVisitor.java      |  224 +
 .../org/objectweb/asm/ModuleWriter.class      |  Bin 0 -> 4666 bytes
 .../org/objectweb/asm/ModuleWriter.java       |  285 +
 .../internal/org/objectweb/asm/Opcodes.class  |  Bin 0 -> 7638 bytes
 .../internal/org/objectweb/asm/Opcodes.java   |  590 ++
 .../asm/RecordComponentVisitor.class          |  Bin 0 -> 2183 bytes
 .../objectweb/asm/RecordComponentVisitor.java |  181 +
 .../objectweb/asm/RecordComponentWriter.class |  Bin 0 -> 4877 bytes
 .../objectweb/asm/RecordComponentWriter.java  |  257 +
 .../internal/org/objectweb/asm/Symbol.class   |  Bin 0 -> 1921 bytes
 .../internal/org/objectweb/asm/Symbol.java    |  291 +
 .../org/objectweb/asm/SymbolTable$Entry.class |  Bin 0 -> 1406 bytes
 .../asm/SymbolTable$LabelEntry.class          |  Bin 0 -> 652 bytes
 .../org/objectweb/asm/SymbolTable.class       |  Bin 0 -> 22245 bytes
 .../org/objectweb/asm/SymbolTable.java        | 1495 ++++++
 .../jdk/internal/org/objectweb/asm/Type.class |  Bin 0 -> 12281 bytes
 .../jdk/internal/org/objectweb/asm/Type.java  |  952 ++++
 .../internal/org/objectweb/asm/TypePath.class |  Bin 0 -> 2853 bytes
 .../internal/org/objectweb/asm/TypePath.java  |  232 +
 .../org/objectweb/asm/TypeReference.class     |  Bin 0 -> 4178 bytes
 .../org/objectweb/asm/TypeReference.java      |  467 ++
 .../objectweb/asm/commons/AdviceAdapter.class |  Bin 0 -> 10675 bytes
 .../objectweb/asm/commons/AdviceAdapter.java  |  702 +++
 .../asm/commons/AnalyzerAdapter.class         |  Bin 0 -> 14861 bytes
 .../asm/commons/AnalyzerAdapter.java          |  942 ++++
 .../asm/commons/AnnotationRemapper.class      |  Bin 0 -> 3794 bytes
 .../asm/commons/AnnotationRemapper.java       |  241 +
 .../objectweb/asm/commons/ClassRemapper.class |  Bin 0 -> 9320 bytes
 .../objectweb/asm/commons/ClassRemapper.java  |  331 ++
 .../asm/commons/CodeSizeEvaluator.class       |  Bin 0 -> 4473 bytes
 .../asm/commons/CodeSizeEvaluator.java        |  239 +
 .../objectweb/asm/commons/FieldRemapper.class |  Bin 0 -> 2705 bytes
 .../objectweb/asm/commons/FieldRemapper.java  |  146 +
 .../asm/commons/GeneratorAdapter.class        |  Bin 0 -> 21796 bytes
 .../asm/commons/GeneratorAdapter.java         | 1401 +++++
 .../asm/commons/InstructionAdapter.class      |  Bin 0 -> 21187 bytes
 .../asm/commons/InstructionAdapter.java       | 1334 +++++
 .../JSRInlinerAdapter$Instantiation.class     |  Bin 0 -> 4275 bytes
 .../asm/commons/JSRInlinerAdapter.class       |  Bin 0 -> 10976 bytes
 .../asm/commons/JSRInlinerAdapter.java        |  604 +++
 .../asm/commons/LocalVariablesSorter.class    |  Bin 0 -> 7033 bytes
 .../asm/commons/LocalVariablesSorter.java     |  383 ++
 .../org/objectweb/asm/commons/Method.class    |  Bin 0 -> 5343 bytes
 .../org/objectweb/asm/commons/Method.java     |  294 +
 .../asm/commons/MethodRemapper.class          |  Bin 0 -> 7791 bytes
 .../objectweb/asm/commons/MethodRemapper.java |  321 ++
 .../asm/commons/ModuleHashesAttribute.class   |  Bin 0 -> 3453 bytes
 .../asm/commons/ModuleHashesAttribute.java    |  170 +
 .../asm/commons/ModuleRemapper.class          |  Bin 0 -> 2637 bytes
 .../objectweb/asm/commons/ModuleRemapper.java |  152 +
 .../commons/ModuleResolutionAttribute.class   |  Bin 0 -> 1892 bytes
 .../commons/ModuleResolutionAttribute.java    |  144 +
 .../asm/commons/ModuleTargetAttribute.class   |  Bin 0 -> 1842 bytes
 .../asm/commons/ModuleTargetAttribute.java    |  118 +
 .../asm/commons/RecordComponentRemapper.class |  Bin 0 -> 2795 bytes
 .../asm/commons/RecordComponentRemapper.java  |  149 +
 .../org/objectweb/asm/commons/Remapper.class  |  Bin 0 -> 7473 bytes
 .../org/objectweb/asm/commons/Remapper.java   |  416 ++
 .../commons/RemappingAnnotationAdapter.class  |  Bin 0 -> 2305 bytes
 .../commons/RemappingAnnotationAdapter.java   |  116 +
 .../asm/commons/RemappingMethodAdapter.class  |  Bin 0 -> 7877 bytes
 .../asm/commons/RemappingMethodAdapter.java   |  310 ++
 .../commons/SerialVersionUIDAdder$Item.class  |  Bin 0 -> 1576 bytes
 .../asm/commons/SerialVersionUIDAdder.class   |  Bin 0 -> 7110 bytes
 .../asm/commons/SerialVersionUIDAdder.java    |  524 ++
 .../asm/commons/SignatureRemapper.class       |  Bin 0 -> 3963 bytes
 .../asm/commons/SignatureRemapper.java        |  204 +
 .../asm/commons/SimpleRemapper.class          |  Bin 0 -> 2266 bytes
 .../objectweb/asm/commons/SimpleRemapper.java |  135 +
 .../asm/commons/StaticInitMerger.class        |  Bin 0 -> 2549 bytes
 .../asm/commons/StaticInitMerger.java         |  156 +
 .../asm/commons/TableSwitchGenerator.class    |  Bin 0 -> 260 bytes
 .../asm/commons/TableSwitchGenerator.java     |   83 +
 .../asm/commons/TryCatchBlockSorter$1.class   |  Bin 0 -> 1929 bytes
 .../asm/commons/TryCatchBlockSorter.class     |  Bin 0 -> 2226 bytes
 .../asm/commons/TryCatchBlockSorter.java      |  157 +
 .../asm/signature/SignatureReader.class       |  Bin 0 -> 3151 bytes
 .../asm/signature/SignatureReader.java        |  284 +
 .../asm/signature/SignatureVisitor.class      |  Bin 0 -> 2443 bytes
 .../asm/signature/SignatureVisitor.java       |  241 +
 .../asm/signature/SignatureWriter.class       |  Bin 0 -> 3339 bytes
 .../asm/signature/SignatureWriter.java        |  279 +
 .../objectweb/asm/tree/AbstractInsnNode.class |  Bin 0 -> 5178 bytes
 .../objectweb/asm/tree/AbstractInsnNode.java  |  301 ++
 .../objectweb/asm/tree/AnnotationNode.class   |  Bin 0 -> 4544 bytes
 .../objectweb/asm/tree/AnnotationNode.java    |  262 +
 .../org/objectweb/asm/tree/ClassNode.class    |  Bin 0 -> 9965 bytes
 .../org/objectweb/asm/tree/ClassNode.java     |  504 ++
 .../objectweb/asm/tree/FieldInsnNode.class    |  Bin 0 -> 1843 bytes
 .../org/objectweb/asm/tree/FieldInsnNode.java |  128 +
 .../org/objectweb/asm/tree/FieldNode.class    |  Bin 0 -> 4793 bytes
 .../org/objectweb/asm/tree/FieldNode.java     |  276 +
 .../org/objectweb/asm/tree/FrameNode.class    |  Bin 0 -> 3420 bytes
 .../org/objectweb/asm/tree/FrameNode.java     |  224 +
 .../org/objectweb/asm/tree/IincInsnNode.class |  Bin 0 -> 1630 bytes
 .../org/objectweb/asm/tree/IincInsnNode.java  |  106 +
 .../objectweb/asm/tree/InnerClassNode.class   |  Bin 0 -> 909 bytes
 .../objectweb/asm/tree/InnerClassNode.java    |  123 +
 .../asm/tree/InsnList$InsnListIterator.class  |  Bin 0 -> 3168 bytes
 .../org/objectweb/asm/tree/InsnList.class     |  Bin 0 -> 6361 bytes
 .../org/objectweb/asm/tree/InsnList.java      |  636 +++
 .../org/objectweb/asm/tree/InsnNode.class     |  Bin 0 -> 1477 bytes
 .../org/objectweb/asm/tree/InsnNode.java      |  105 +
 .../org/objectweb/asm/tree/IntInsnNode.class  |  Bin 0 -> 1645 bytes
 .../org/objectweb/asm/tree/IntInsnNode.java   |  111 +
 .../asm/tree/InvokeDynamicInsnNode.class      |  Bin 0 -> 2000 bytes
 .../asm/tree/InvokeDynamicInsnNode.java       |  124 +
 .../org/objectweb/asm/tree/JumpInsnNode.class |  Bin 0 -> 2035 bytes
 .../org/objectweb/asm/tree/JumpInsnNode.java  |  119 +
 .../org/objectweb/asm/tree/LabelNode.class    |  Bin 0 -> 1851 bytes
 .../org/objectweb/asm/tree/LabelNode.java     |  111 +
 .../org/objectweb/asm/tree/LdcInsnNode.class  |  Bin 0 -> 1603 bytes
 .../org/objectweb/asm/tree/LdcInsnNode.java   |  115 +
 .../objectweb/asm/tree/LineNumberNode.class   |  Bin 0 -> 1785 bytes
 .../objectweb/asm/tree/LineNumberNode.java    |  106 +
 .../tree/LocalVariableAnnotationNode.class    |  Bin 0 -> 2947 bytes
 .../asm/tree/LocalVariableAnnotationNode.java |  171 +
 .../asm/tree/LocalVariableNode.class          |  Bin 0 -> 1440 bytes
 .../objectweb/asm/tree/LocalVariableNode.java |  124 +
 .../asm/tree/LookupSwitchInsnNode.class       |  Bin 0 -> 3190 bytes
 .../asm/tree/LookupSwitchInsnNode.java        |  125 +
 .../objectweb/asm/tree/MethodInsnNode.class   |  Bin 0 -> 2250 bytes
 .../objectweb/asm/tree/MethodInsnNode.java    |  155 +
 .../org/objectweb/asm/tree/MethodNode$1.class |  Bin 0 -> 1008 bytes
 .../org/objectweb/asm/tree/MethodNode.class   |  Bin 0 -> 19166 bytes
 .../org/objectweb/asm/tree/MethodNode.java    |  804 +++
 .../objectweb/asm/tree/ModuleExportNode.class |  Bin 0 -> 1304 bytes
 .../objectweb/asm/tree/ModuleExportNode.java  |  115 +
 .../org/objectweb/asm/tree/ModuleNode.class   |  Bin 0 -> 5290 bytes
 .../org/objectweb/asm/tree/ModuleNode.java    |  277 +
 .../objectweb/asm/tree/ModuleOpenNode.class   |  Bin 0 -> 1296 bytes
 .../objectweb/asm/tree/ModuleOpenNode.java    |  114 +
 .../asm/tree/ModuleProvideNode.class          |  Bin 0 -> 1167 bytes
 .../objectweb/asm/tree/ModuleProvideNode.java |  101 +
 .../asm/tree/ModuleRequireNode.class          |  Bin 0 -> 847 bytes
 .../objectweb/asm/tree/ModuleRequireNode.java |  105 +
 .../asm/tree/MultiANewArrayInsnNode.class     |  Bin 0 -> 1727 bytes
 .../asm/tree/MultiANewArrayInsnNode.java      |  106 +
 .../objectweb/asm/tree/ParameterNode.class    |  Bin 0 -> 766 bytes
 .../org/objectweb/asm/tree/ParameterNode.java |  100 +
 .../asm/tree/RecordComponentNode.class        |  Bin 0 -> 4590 bytes
 .../asm/tree/RecordComponentNode.java         |  236 +
 .../asm/tree/TableSwitchInsnNode.class        |  Bin 0 -> 2908 bytes
 .../asm/tree/TableSwitchInsnNode.java         |  125 +
 .../asm/tree/TryCatchBlockNode.class          |  Bin 0 -> 2826 bytes
 .../objectweb/asm/tree/TryCatchBlockNode.java |  159 +
 .../asm/tree/TypeAnnotationNode.class         |  Bin 0 -> 1157 bytes
 .../asm/tree/TypeAnnotationNode.java          |  117 +
 .../org/objectweb/asm/tree/TypeInsnNode.class |  Bin 0 -> 1691 bytes
 .../org/objectweb/asm/tree/TypeInsnNode.java  |  117 +
 .../UnsupportedClassVersionException.class    |  Bin 0 -> 467 bytes
 .../UnsupportedClassVersionException.java     |   72 +
 .../org/objectweb/asm/tree/Util.class         |  Bin 0 -> 5218 bytes
 .../internal/org/objectweb/asm/tree/Util.java |  195 +
 .../org/objectweb/asm/tree/VarInsnNode.class  |  Bin 0 -> 1652 bytes
 .../org/objectweb/asm/tree/VarInsnNode.java   |  114 +
 .../asm/tree/analysis/Analyzer.class          |  Bin 0 -> 18120 bytes
 .../objectweb/asm/tree/analysis/Analyzer.java |  729 +++
 .../asm/tree/analysis/AnalyzerException.class |  Bin 0 -> 1893 bytes
 .../asm/tree/analysis/AnalyzerException.java  |  121 +
 .../asm/tree/analysis/BasicInterpreter.class  |  Bin 0 -> 10383 bytes
 .../asm/tree/analysis/BasicInterpreter.java   |  407 ++
 .../asm/tree/analysis/BasicValue.class        |  Bin 0 -> 2128 bytes
 .../asm/tree/analysis/BasicValue.java         |  161 +
 .../asm/tree/analysis/BasicVerifier.class     |  Bin 0 -> 11498 bytes
 .../asm/tree/analysis/BasicVerifier.java      |  482 ++
 .../objectweb/asm/tree/analysis/Frame.class   |  Bin 0 -> 14475 bytes
 .../objectweb/asm/tree/analysis/Frame.java    |  784 +++
 .../asm/tree/analysis/Interpreter.class       |  Bin 0 -> 4222 bytes
 .../asm/tree/analysis/Interpreter.java        |  299 ++
 .../asm/tree/analysis/SimpleVerifier.class    |  Bin 0 -> 8278 bytes
 .../asm/tree/analysis/SimpleVerifier.java     |  413 ++
 .../tree/analysis/SmallSet$IteratorImpl.class |  Bin 0 -> 1484 bytes
 .../asm/tree/analysis/SmallSet.class          |  Bin 0 -> 2245 bytes
 .../objectweb/asm/tree/analysis/SmallSet.java |  230 +
 .../asm/tree/analysis/SourceInterpreter.class |  Bin 0 -> 8930 bytes
 .../asm/tree/analysis/SourceInterpreter.java  |  252 +
 .../asm/tree/analysis/SourceValue.class       |  Bin 0 -> 1650 bytes
 .../asm/tree/analysis/SourceValue.java        |  151 +
 .../asm/tree/analysis/Subroutine.class        |  Bin 0 -> 1782 bytes
 .../asm/tree/analysis/Subroutine.java         |  138 +
 .../objectweb/asm/tree/analysis/Value.class   |  Bin 0 -> 160 bytes
 .../objectweb/asm/tree/analysis/Value.java    |   76 +
 .../org/objectweb/asm/util/ASMifier.class     |  Bin 0 -> 38720 bytes
 .../org/objectweb/asm/util/ASMifier.java      | 1647 ++++++
 .../objectweb/asm/util/ASMifierSupport.class  |  Bin 0 -> 370 bytes
 .../objectweb/asm/util/ASMifierSupport.java   |   83 +
 .../asm/util/CheckAnnotationAdapter.class     |  Bin 0 -> 3097 bytes
 .../asm/util/CheckAnnotationAdapter.java      |  167 +
 .../asm/util/CheckClassAdapter$1.class        |  Bin 0 -> 749 bytes
 .../asm/util/CheckClassAdapter.class          |  Bin 0 -> 23238 bytes
 .../objectweb/asm/util/CheckClassAdapter.java | 1169 ++++
 .../asm/util/CheckFieldAdapter.class          |  Bin 0 -> 2967 bytes
 .../objectweb/asm/util/CheckFieldAdapter.java |  148 +
 .../asm/util/CheckFrameAnalyzer.class         |  Bin 0 -> 14050 bytes
 .../asm/util/CheckFrameAnalyzer.java          |  513 ++
 .../asm/util/CheckMethodAdapter$1.class       |  Bin 0 -> 4104 bytes
 .../asm/util/CheckMethodAdapter$Method.class  |  Bin 0 -> 1744 bytes
 ...eckMethodAdapter$MethodWriterWrapper.class |  Bin 0 -> 1378 bytes
 .../asm/util/CheckMethodAdapter.class         |  Bin 0 -> 27615 bytes
 .../asm/util/CheckMethodAdapter.java          | 1519 ++++++
 .../asm/util/CheckModuleAdapter$NameSet.class |  Bin 0 -> 1187 bytes
 .../asm/util/CheckModuleAdapter.class         |  Bin 0 -> 4611 bytes
 .../asm/util/CheckModuleAdapter.java          |  244 +
 .../util/CheckRecordComponentAdapter.class    |  Bin 0 -> 3047 bytes
 .../asm/util/CheckRecordComponentAdapter.java |  153 +
 .../util/CheckSignatureAdapter$State.class    |  Bin 0 -> 1814 bytes
 .../asm/util/CheckSignatureAdapter.class      |  Bin 0 -> 7381 bytes
 .../asm/util/CheckSignatureAdapter.java       |  391 ++
 .../org/objectweb/asm/util/Printer.class      |  Bin 0 -> 15827 bytes
 .../org/objectweb/asm/util/Printer.java       | 1342 +++++
 .../org/objectweb/asm/util/Textifier.class    |  Bin 0 -> 35476 bytes
 .../org/objectweb/asm/util/Textifier.java     | 1636 ++++++
 .../objectweb/asm/util/TextifierSupport.class |  Bin 0 -> 337 bytes
 .../objectweb/asm/util/TextifierSupport.java  |   79 +
 .../asm/util/TraceAnnotationVisitor.class     |  Bin 0 -> 2178 bytes
 .../asm/util/TraceAnnotationVisitor.java      |  125 +
 .../asm/util/TraceClassVisitor.class          |  Bin 0 -> 6687 bytes
 .../objectweb/asm/util/TraceClassVisitor.java |  276 +
 .../asm/util/TraceFieldVisitor.class          |  Bin 0 -> 2399 bytes
 .../objectweb/asm/util/TraceFieldVisitor.java |  125 +
 .../asm/util/TraceMethodVisitor.class         |  Bin 0 -> 8932 bytes
 .../asm/util/TraceMethodVisitor.java          |  344 ++
 .../asm/util/TraceModuleVisitor.class         |  Bin 0 -> 2263 bytes
 .../asm/util/TraceModuleVisitor.java          |  143 +
 .../util/TraceRecordComponentVisitor.class    |  Bin 0 -> 2519 bytes
 .../asm/util/TraceRecordComponentVisitor.java |  128 +
 .../asm/util/TraceSignatureVisitor.class      |  Bin 0 -> 6072 bytes
 .../asm/util/TraceSignatureVisitor.java       |  376 ++
 .../jdk/internal/org/xml/sax/Attributes.class |  Bin 0 -> 497 bytes
 .../jdk/internal/org/xml/sax/Attributes.java  |  281 +
 .../internal/org/xml/sax/ContentHandler.class |  Bin 0 -> 851 bytes
 .../internal/org/xml/sax/ContentHandler.java  |  443 ++
 .../jdk/internal/org/xml/sax/DTDHandler.class |  Bin 0 -> 735 bytes
 .../jdk/internal/org/xml/sax/DTDHandler.java  |  173 +
 .../internal/org/xml/sax/EntityResolver.class |  Bin 0 -> 330 bytes
 .../internal/org/xml/sax/EntityResolver.java  |  143 +
 .../internal/org/xml/sax/ErrorHandler.class   |  Bin 0 -> 321 bytes
 .../internal/org/xml/sax/ErrorHandler.java    |  163 +
 .../internal/org/xml/sax/InputSource.class    |  Bin 0 -> 1798 bytes
 .../jdk/internal/org/xml/sax/InputSource.java |  363 ++
 .../jdk/internal/org/xml/sax/Locator.class    |  Bin 0 -> 243 bytes
 .../std/jdk/internal/org/xml/sax/Locator.java |  160 +
 .../internal/org/xml/sax/SAXException.class   |  Bin 0 -> 3443 bytes
 .../internal/org/xml/sax/SAXException.java    |  243 +
 .../xml/sax/SAXNotRecognizedException.class   |  Bin 0 -> 580 bytes
 .../xml/sax/SAXNotRecognizedException.java    |   80 +
 .../xml/sax/SAXNotSupportedException.class    |  Bin 0 -> 577 bytes
 .../org/xml/sax/SAXNotSupportedException.java |   80 +
 .../org/xml/sax/SAXParseException.class       |  Bin 0 -> 2912 bytes
 .../org/xml/sax/SAXParseException.java        |  314 ++
 .../jdk/internal/org/xml/sax/XMLReader.class  |  Bin 0 -> 1270 bytes
 .../jdk/internal/org/xml/sax/XMLReader.java   |  428 ++
 .../org/xml/sax/helpers/DefaultHandler.class  |  Bin 0 -> 3104 bytes
 .../org/xml/sax/helpers/DefaultHandler.java   |  491 ++
 .../internal/perf/Perf$CleanerAction.class    |  Bin 0 -> 1163 bytes
 .../internal/perf/Perf$GetPerfAction.class    |  Bin 0 -> 741 bytes
 .../std/jdk/internal/perf/Perf.class          |  Bin 0 -> 2974 bytes
 .../test_data/std/jdk/internal/perf/Perf.java |  438 ++
 .../perf/PerfCounter$CoreCounters.class       |  Bin 0 -> 1003 bytes
 .../std/jdk/internal/perf/PerfCounter.class   |  Bin 0 -> 3214 bytes
 .../std/jdk/internal/perf/PerfCounter.java    |  182 +
 .../std/jdk/internal/platform/Container.class |  Bin 0 -> 445 bytes
 .../std/jdk/internal/platform/Container.java  |   45 +
 .../std/jdk/internal/platform/Metrics.class   |  Bin 0 -> 1067 bytes
 .../std/jdk/internal/platform/Metrics.java    |  399 ++
 .../jdk/internal/platform/SystemMetrics.class |  Bin 0 -> 395 bytes
 .../jdk/internal/platform/SystemMetrics.java  |   31 +
 .../internal/random/L128X1024MixRandom.class  |  Bin 0 -> 3732 bytes
 .../internal/random/L128X1024MixRandom.java   |  331 ++
 .../internal/random/L128X128MixRandom.class   |  Bin 0 -> 2762 bytes
 .../internal/random/L128X128MixRandom.java    |  261 +
 .../internal/random/L128X256MixRandom.class   |  Bin 0 -> 3135 bytes
 .../internal/random/L128X256MixRandom.java    |  285 +
 .../jdk/internal/random/L32X64MixRandom.class |  Bin 0 -> 2458 bytes
 .../jdk/internal/random/L32X64MixRandom.java  |  251 +
 .../internal/random/L64X1024MixRandom.class   |  Bin 0 -> 3347 bytes
 .../internal/random/L64X1024MixRandom.java    |  314 ++
 .../internal/random/L64X128MixRandom.class    |  Bin 0 -> 2384 bytes
 .../jdk/internal/random/L64X128MixRandom.java |  247 +
 .../random/L64X128StarStarRandom.class        |  Bin 0 -> 2406 bytes
 .../random/L64X128StarStarRandom.java         |  247 +
 .../internal/random/L64X256MixRandom.class    |  Bin 0 -> 2710 bytes
 .../jdk/internal/random/L64X256MixRandom.java |  262 +
 .../random/Xoroshiro128PlusPlus.class         |  Bin 0 -> 2972 bytes
 .../internal/random/Xoroshiro128PlusPlus.java |  269 +
 .../internal/random/Xoshiro256PlusPlus.class  |  Bin 0 -> 3399 bytes
 .../internal/random/Xoshiro256PlusPlus.java   |  300 ++
 .../std/jdk/internal/ref/Cleaner$1.class      |  Bin 0 -> 1197 bytes
 .../std/jdk/internal/ref/Cleaner.class        |  Bin 0 -> 2079 bytes
 .../std/jdk/internal/ref/Cleaner.java         |  156 +
 .../jdk/internal/ref/CleanerFactory$1.class   |  Bin 0 -> 790 bytes
 .../std/jdk/internal/ref/CleanerFactory.class |  Bin 0 -> 713 bytes
 .../std/jdk/internal/ref/CleanerFactory.java  |   60 +
 .../ref/CleanerImpl$CleanerCleanable.class    |  Bin 0 -> 731 bytes
 .../CleanerImpl$InnocuousThreadFactory.class  |  Bin 0 -> 1404 bytes
 .../ref/CleanerImpl$PhantomCleanableRef.class |  Bin 0 -> 1270 bytes
 .../std/jdk/internal/ref/CleanerImpl.class    |  Bin 0 -> 3261 bytes
 .../std/jdk/internal/ref/CleanerImpl.java     |  234 +
 .../jdk/internal/ref/PhantomCleanable.class   |  Bin 0 -> 2795 bytes
 .../jdk/internal/ref/PhantomCleanable.java    |  180 +
 .../internal/reflect/AccessorGenerator.class  |  Bin 0 -> 12695 bytes
 .../internal/reflect/AccessorGenerator.java   |  722 +++
 .../jdk/internal/reflect/AccessorUtils.class  |  Bin 0 -> 2633 bytes
 .../jdk/internal/reflect/AccessorUtils.java   |  109 +
 .../std/jdk/internal/reflect/ByteVector.class |  Bin 0 -> 258 bytes
 .../std/jdk/internal/reflect/ByteVector.java  |   37 +
 .../internal/reflect/ByteVectorFactory.class  |  Bin 0 -> 587 bytes
 .../internal/reflect/ByteVectorFactory.java   |   36 +
 .../jdk/internal/reflect/ByteVectorImpl.class |  Bin 0 -> 1550 bytes
 .../jdk/internal/reflect/ByteVectorImpl.java  |   88 +
 .../internal/reflect/CallerSensitive.class    |  Bin 0 -> 404 bytes
 .../jdk/internal/reflect/CallerSensitive.java |   41 +
 .../reflect/CallerSensitiveAdapter.class      |  Bin 0 -> 416 bytes
 .../reflect/CallerSensitiveAdapter.java       |  112 +
 .../jdk/internal/reflect/ClassDefiner$1.class |  Bin 0 -> 1010 bytes
 .../jdk/internal/reflect/ClassDefiner.class   |  Bin 0 -> 1426 bytes
 .../jdk/internal/reflect/ClassDefiner.java    |   80 +
 .../internal/reflect/ClassFileAssembler.class |  Bin 0 -> 11869 bytes
 .../internal/reflect/ClassFileAssembler.java  |  671 +++
 .../internal/reflect/ClassFileConstants.class |  Bin 0 -> 2924 bytes
 .../internal/reflect/ClassFileConstants.java  |  140 +
 .../internal/reflect/ConstantPool$Tag.class   |  Bin 0 -> 2661 bytes
 .../jdk/internal/reflect/ConstantPool.class   |  Bin 0 -> 3786 bytes
 .../jdk/internal/reflect/ConstantPool.java    |  132 +
 .../reflect/ConstructorAccessor.class         |  Bin 0 -> 358 bytes
 .../internal/reflect/ConstructorAccessor.java |   41 +
 .../reflect/ConstructorAccessorImpl.class     |  Bin 0 -> 624 bytes
 .../reflect/ConstructorAccessorImpl.java      |   41 +
 .../reflect/CsMethodAccessorAdapter.class     |  Bin 0 -> 2503 bytes
 .../reflect/CsMethodAccessorAdapter.java      |   72 +
 .../reflect/DelegatingClassLoader.class       |  Bin 0 -> 399 bytes
 ...tructorHandleAccessor$NativeAccessor.class |  Bin 0 -> 1284 bytes
 .../DirectConstructorHandleAccessor.class     |  Bin 0 -> 3953 bytes
 .../DirectConstructorHandleAccessor.java      |  110 +
 ...sor$NativeAccessor$ReflectiveInvoker.class |  Bin 0 -> 3150 bytes
 ...tMethodHandleAccessor$NativeAccessor.class |  Bin 0 -> 3557 bytes
 .../reflect/DirectMethodHandleAccessor.class  |  Bin 0 -> 8093 bytes
 .../reflect/DirectMethodHandleAccessor.java   |  354 ++
 .../jdk/internal/reflect/FieldAccessor.class  |  Bin 0 -> 1220 bytes
 .../jdk/internal/reflect/FieldAccessor.java   |   96 +
 .../internal/reflect/FieldAccessorImpl.class  |  Bin 0 -> 6897 bytes
 .../internal/reflect/FieldAccessorImpl.java   |  267 +
 ...tionExceptionConstructorAccessorImpl.class |  Bin 0 -> 906 bytes
 ...ationExceptionConstructorAccessorImpl.java |   52 +
 .../internal/reflect/Label$PatchInfo.class    |  Bin 0 -> 692 bytes
 .../std/jdk/internal/reflect/Label.class      |  Bin 0 -> 1500 bytes
 .../std/jdk/internal/reflect/Label.java       |   76 +
 .../internal/reflect/MagicAccessorImpl.class  |  Bin 0 -> 318 bytes
 .../internal/reflect/MagicAccessorImpl.java   |   47 +
 .../jdk/internal/reflect/MethodAccessor.class |  Bin 0 -> 518 bytes
 .../jdk/internal/reflect/MethodAccessor.java  |   43 +
 .../internal/reflect/MethodAccessorImpl.class |  Bin 0 -> 1020 bytes
 .../internal/reflect/MethodAccessorImpl.java  |   53 +
 ...ndleAccessorFactory$LazyStaticHolder.class |  Bin 0 -> 753 bytes
 .../reflect/MethodHandleAccessorFactory.class |  Bin 0 -> 11117 bytes
 .../reflect/MethodHandleAccessorFactory.java  |  417 ++
 ...MethodHandleBooleanFieldAccessorImpl.class |  Bin 0 -> 5957 bytes
 .../MethodHandleBooleanFieldAccessorImpl.java |  185 +
 .../MethodHandleByteFieldAccessorImpl.class   |  Bin 0 -> 5716 bytes
 .../MethodHandleByteFieldAccessorImpl.java    |  185 +
 ...thodHandleCharacterFieldAccessorImpl.class |  Bin 0 -> 5792 bytes
 ...ethodHandleCharacterFieldAccessorImpl.java |  185 +
 .../MethodHandleDoubleFieldAccessorImpl.class |  Bin 0 -> 6565 bytes
 .../MethodHandleDoubleFieldAccessorImpl.java  |  204 +
 .../MethodHandleFieldAccessorImpl.class       |  Bin 0 -> 3207 bytes
 .../MethodHandleFieldAccessorImpl.java        |   96 +
 .../MethodHandleFloatFieldAccessorImpl.class  |  Bin 0 -> 6406 bytes
 .../MethodHandleFloatFieldAccessorImpl.java   |  201 +
 ...MethodHandleIntegerFieldAccessorImpl.class |  Bin 0 -> 6120 bytes
 .../MethodHandleIntegerFieldAccessorImpl.java |  195 +
 .../MethodHandleLongFieldAccessorImpl.class   |  Bin 0 -> 6261 bytes
 .../MethodHandleLongFieldAccessorImpl.java    |  198 +
 .../MethodHandleObjectFieldAccessorImpl.class |  Bin 0 -> 5706 bytes
 .../MethodHandleObjectFieldAccessorImpl.java  |  168 +
 .../MethodHandleShortFieldAccessorImpl.class  |  Bin 0 -> 5866 bytes
 .../MethodHandleShortFieldAccessorImpl.java   |  189 +
 .../internal/reflect/Reflection$1Holder.class |  Bin 0 -> 750 bytes
 .../std/jdk/internal/reflect/Reflection.class |  Bin 0 -> 11388 bytes
 .../std/jdk/internal/reflect/Reflection.java  |  445 ++
 .../reflect/ReflectionFactory$Config.class    |  Bin 0 -> 1911 bytes
 ...onFactory$GetReflectionFactoryAction.class |  Bin 0 -> 886 bytes
 .../internal/reflect/ReflectionFactory.class  |  Bin 0 -> 16299 bytes
 .../internal/reflect/ReflectionFactory.java   |  636 +++
 ...zationConstructorAccessorGenerator$1.class |  Bin 0 -> 2083 bytes
 ...lizationConstructorAccessorGenerator.class |  Bin 0 -> 10908 bytes
 ...alizationConstructorAccessorGenerator.java |  725 +++
 ...SerializationConstructorAccessorImpl.class |  Bin 0 -> 403 bytes
 .../SerializationConstructorAccessorImpl.java |   45 +
 .../std/jdk/internal/util/Architecture.class  |  Bin 0 -> 4384 bytes
 .../std/jdk/internal/util/Architecture.java   |  245 +
 .../std/jdk/internal/util/ArraysSupport.class |  Bin 0 -> 13180 bytes
 .../std/jdk/internal/util/ArraysSupport.java  |  971 ++++
 .../std/jdk/internal/util/ByteArray.class     |  Bin 0 -> 3747 bytes
 .../std/jdk/internal/util/ByteArray.java      |  424 ++
 .../internal/util/ByteArrayLittleEndian.class |  Bin 0 -> 3798 bytes
 .../internal/util/ByteArrayLittleEndian.java  |  424 ++
 .../jdk/internal/util/ClassFileDumper$1.class |  Bin 0 -> 2307 bytes
 .../jdk/internal/util/ClassFileDumper$2.class |  Bin 0 -> 2115 bytes
 .../jdk/internal/util/ClassFileDumper.class   |  Bin 0 -> 5174 bytes
 .../jdk/internal/util/ClassFileDumper.java    |  196 +
 .../std/jdk/internal/util/DecimalDigits.class |  Bin 0 -> 785 bytes
 .../std/jdk/internal/util/DecimalDigits.java  |   87 +
 .../std/jdk/internal/util/HexDigits.class     |  Bin 0 -> 2244 bytes
 .../std/jdk/internal/util/HexDigits.java      |  202 +
 ...dicate$SmallImmutableBitSetPredicate.class |  Bin 0 -> 2112 bytes
 .../util/ImmutableBitSetPredicate.class       |  Bin 0 -> 1383 bytes
 .../util/ImmutableBitSetPredicate.java        |  114 +
 .../util/NullableKeyValueHolder.class         |  Bin 0 -> 2675 bytes
 .../internal/util/NullableKeyValueHolder.java |  166 +
 .../std/jdk/internal/util/OSVersion.class     |  Bin 0 -> 4079 bytes
 .../std/jdk/internal/util/OSVersion.java      |  137 +
 .../std/jdk/internal/util/OctalDigits.class   |  Bin 0 -> 1754 bytes
 .../std/jdk/internal/util/OctalDigits.java    |  130 +
 .../jdk/internal/util/OperatingSystem.class   |  Bin 0 -> 1961 bytes
 .../jdk/internal/util/OperatingSystem.java    |  136 +
 .../std/jdk/internal/util/PlatformProps.class |  Bin 0 -> 1201 bytes
 .../std/jdk/internal/util/PlatformProps.java  |   69 +
 .../jdk/internal/util/Preconditions$1.class   |  Bin 0 -> 1010 bytes
 .../jdk/internal/util/Preconditions$2.class   |  Bin 0 -> 1007 bytes
 .../jdk/internal/util/Preconditions$3.class   |  Bin 0 -> 992 bytes
 .../jdk/internal/util/Preconditions$4.class   |  Bin 0 -> 1593 bytes
 .../std/jdk/internal/util/Preconditions.class |  Bin 0 -> 8151 bytes
 .../std/jdk/internal/util/Preconditions.java  |  546 ++
 .../std/jdk/internal/util/ReferenceKey.class  |  Bin 0 -> 420 bytes
 .../std/jdk/internal/util/ReferenceKey.java   |   51 +
 .../internal/util/ReferencedKeyMap$1.class    |  Bin 0 -> 965 bytes
 .../jdk/internal/util/ReferencedKeyMap.class  |  Bin 0 -> 11672 bytes
 .../jdk/internal/util/ReferencedKeyMap.java   |  483 ++
 .../jdk/internal/util/ReferencedKeySet.class  |  Bin 0 -> 4451 bytes
 .../jdk/internal/util/ReferencedKeySet.java   |  214 +
 .../jdk/internal/util/SoftReferenceKey.class  |  Bin 0 -> 1993 bytes
 .../jdk/internal/util/SoftReferenceKey.java   |   91 +
 .../jdk/internal/util/StaticProperty.class    |  Bin 0 -> 4717 bytes
 .../std/jdk/internal/util/StaticProperty.java |  311 ++
 .../internal/util/StrongReferenceKey.class    |  Bin 0 -> 1836 bytes
 .../jdk/internal/util/StrongReferenceKey.java |   82 +
 .../jdk/internal/util/SystemProps$Raw.class   |  Bin 0 -> 3168 bytes
 .../std/jdk/internal/util/SystemProps.class   |  Bin 0 -> 4594 bytes
 .../std/jdk/internal/util/SystemProps.java    |  322 ++
 .../jdk/internal/util/WeakReferenceKey.class  |  Bin 0 -> 1993 bytes
 .../jdk/internal/util/WeakReferenceKey.java   |   91 +
 ...ator$RandomArbitraryJumpsSpliterator.class |  Bin 0 -> 3021 bytes
 ...leGenerator$RandomDoublesSpliterator.class |  Bin 0 -> 3114 bytes
 ...pableGenerator$RandomIntsSpliterator.class |  Bin 0 -> 3081 bytes
 ...ableGenerator$RandomJumpsSpliterator.class |  Bin 0 -> 2867 bytes
 ...ableGenerator$RandomLeapsSpliterator.class |  Bin 0 -> 3023 bytes
 ...ableGenerator$RandomLongsSpliterator.class |  Bin 0 -> 3088 bytes
 ...AbstractArbitrarilyJumpableGenerator.class |  Bin 0 -> 4926 bytes
 ...Support$AbstractSpliteratorGenerator.class |  Bin 0 -> 5822 bytes
 ...leGenerator$RandomDoublesSpliterator.class |  Bin 0 -> 2960 bytes
 ...tableGenerator$RandomIntsSpliterator.class |  Bin 0 -> 2927 bytes
 ...ableGenerator$RandomLongsSpliterator.class |  Bin 0 -> 2934 bytes
 ...bleGenerator$RandomSplitsSpliterator.class |  Bin 0 -> 2998 bytes
 ...mSupport$AbstractSplittableGenerator.class |  Bin 0 -> 3454 bytes
 ...ator$RandomSplitsSpliteratorWithSalt.class |  Bin 0 -> 3491 bytes
 ...AbstractSplittableWithBrineGenerator.class |  Bin 0 -> 2324 bytes
 .../RandomSupport$DoubleZigguratTables.class  |  Bin 0 -> 29872 bytes
 ...ndomSupport$RandomDoublesSpliterator.class |  Bin 0 -> 2547 bytes
 .../RandomSupport$RandomIntsSpliterator.class |  Bin 0 -> 2514 bytes
 ...RandomSupport$RandomLongsSpliterator.class |  Bin 0 -> 2521 bytes
 .../RandomSupport$RandomSpliterator.class     |  Bin 0 -> 764 bytes
 .../internal/util/random/RandomSupport.class  |  Bin 0 -> 12224 bytes
 .../internal/util/random/RandomSupport.java   | 3027 +++++++++++
 .../jdk/internal/util/regex/Grapheme.class    |  Bin 0 -> 4314 bytes
 .../std/jdk/internal/util/regex/Grapheme.java |  332 ++
 .../util/regex/IndicConjunctBreak.class       |  Bin 0 -> 3444 bytes
 .../util/regex/IndicConjunctBreak.java        |  286 +
 .../util/xml/PropertiesDefaultHandler.class   |  Bin 0 -> 7816 bytes
 .../util/xml/PropertiesDefaultHandler.java    |  262 +
 .../std/jdk/internal/util/xml/SAXParser.class |  Bin 0 -> 3144 bytes
 .../std/jdk/internal/util/xml/SAXParser.java  |  246 +
 .../util/xml/XMLStreamException.class         |  Bin 0 -> 968 bytes
 .../internal/util/xml/XMLStreamException.java |   91 +
 .../internal/util/xml/XMLStreamWriter.class   |  Bin 0 -> 1032 bytes
 .../internal/util/xml/XMLStreamWriter.java    |  158 +
 .../jdk/internal/util/xml/impl/Attrs.class    |  Bin 0 -> 4061 bytes
 .../std/jdk/internal/util/xml/impl/Attrs.java |  426 ++
 .../jdk/internal/util/xml/impl/Input.class    |  Bin 0 -> 743 bytes
 .../std/jdk/internal/util/xml/impl/Input.java |   83 +
 .../std/jdk/internal/util/xml/impl/Pair.class |  Bin 0 -> 1267 bytes
 .../std/jdk/internal/util/xml/impl/Pair.java  |  122 +
 .../jdk/internal/util/xml/impl/Parser.class   |  Bin 0 -> 33209 bytes
 .../jdk/internal/util/xml/impl/Parser.java    | 3454 ++++++++++++
 .../internal/util/xml/impl/ParserSAX.class    |  Bin 0 -> 9473 bytes
 .../jdk/internal/util/xml/impl/ParserSAX.java |  696 +++
 .../internal/util/xml/impl/ReaderUTF16.class  |  Bin 0 -> 1384 bytes
 .../internal/util/xml/impl/ReaderUTF16.java   |  122 +
 .../internal/util/xml/impl/ReaderUTF8.class   |  Bin 0 -> 1415 bytes
 .../internal/util/xml/impl/ReaderUTF8.java    |  138 +
 .../util/xml/impl/SAXParserImpl.class         |  Bin 0 -> 1403 bytes
 .../internal/util/xml/impl/SAXParserImpl.java |  118 +
 .../impl/XMLStreamWriterImpl$Element.class    |  Bin 0 -> 1351 bytes
 .../util/xml/impl/XMLStreamWriterImpl.class   |  Bin 0 -> 9680 bytes
 .../util/xml/impl/XMLStreamWriterImpl.java    |  658 +++
 .../internal/util/xml/impl/XMLWriter.class    |  Bin 0 -> 3297 bytes
 .../jdk/internal/util/xml/impl/XMLWriter.java |  152 +
 .../jdk/internal/vm/Continuation$Pinned.class |  Bin 0 -> 1293 bytes
 .../vm/Continuation$PreemptStatus.class       |  Bin 0 -> 2113 bytes
 .../std/jdk/internal/vm/Continuation.class    |  Bin 0 -> 13937 bytes
 .../std/jdk/internal/vm/Continuation.java     |  503 ++
 .../jdk/internal/vm/ContinuationScope.class   |  Bin 0 -> 1070 bytes
 .../jdk/internal/vm/ContinuationScope.java    |   73 +
 .../jdk/internal/vm/ContinuationSupport.class |  Bin 0 -> 737 bytes
 .../jdk/internal/vm/ContinuationSupport.java  |   54 +
 .../std/jdk/internal/vm/FillerObject.class    |  Bin 0 -> 293 bytes
 .../std/jdk/internal/vm/FillerObject.java     |   31 +
 .../internal/vm/ForeignLinkerSupport.class    |  Bin 0 -> 506 bytes
 .../jdk/internal/vm/ForeignLinkerSupport.java |   44 +
 ...copedValueContainer$BindingsSnapshot.class |  Bin 0 -> 1894 bytes
 .../internal/vm/ScopedValueContainer.class    |  Bin 0 -> 5291 bytes
 .../jdk/internal/vm/ScopedValueContainer.java |  213 +
 .../internal/vm/SharedThreadContainer.class   |  Bin 0 -> 5342 bytes
 .../internal/vm/SharedThreadContainer.java    |  166 +
 .../std/jdk/internal/vm/StackChunk.class      |  Bin 0 -> 639 bytes
 .../std/jdk/internal/vm/StackChunk.java       |   40 +
 .../std/jdk/internal/vm/StackableScope.class  |  Bin 0 -> 3932 bytes
 .../std/jdk/internal/vm/StackableScope.java   |  261 +
 .../std/jdk/internal/vm/ThreadContainer.class |  Bin 0 -> 2901 bytes
 .../std/jdk/internal/vm/ThreadContainer.java  |  116 +
 ...$RootContainer$CountingRootContainer.class |  Bin 0 -> 1645 bytes
 ...$RootContainer$TrackingRootContainer.class |  Bin 0 -> 2608 bytes
 .../vm/ThreadContainers$RootContainer.class   |  Bin 0 -> 2356 bytes
 .../jdk/internal/vm/ThreadContainers.class    |  Bin 0 -> 7216 bytes
 .../std/jdk/internal/vm/ThreadContainers.java |  293 +
 ...dDumper$BoundedByteArrayOutputStream.class |  Bin 0 -> 1003 bytes
 .../std/jdk/internal/vm/ThreadDumper.class    |  Bin 0 -> 11537 bytes
 .../std/jdk/internal/vm/ThreadDumper.java     |  370 ++
 .../jdk/internal/vm/TranslatedException.class |  Bin 0 -> 8855 bytes
 .../jdk/internal/vm/TranslatedException.java  |  318 ++
 .../vm/VMSupport$AnnotationDecoder.class      |  Bin 0 -> 857 bytes
 .../jdk/internal/vm/VMSupport$IOReader.class  |  Bin 0 -> 376 bytes
 .../std/jdk/internal/vm/VMSupport.class       |  Bin 0 -> 20827 bytes
 .../std/jdk/internal/vm/VMSupport.java        |  581 ++
 .../vm/annotation/ChangesCurrentThread.class  |  Bin 0 -> 439 bytes
 .../vm/annotation/ChangesCurrentThread.java   |   44 +
 .../internal/vm/annotation/Contended.class    |  Bin 0 -> 472 bytes
 .../jdk/internal/vm/annotation/Contended.java |   83 +
 .../internal/vm/annotation/DontInline.class   |  Bin 0 -> 419 bytes
 .../internal/vm/annotation/DontInline.java    |   50 +
 .../internal/vm/annotation/ForceInline.class  |  Bin 0 -> 421 bytes
 .../internal/vm/annotation/ForceInline.java   |   51 +
 .../jdk/internal/vm/annotation/Hidden.class   |  Bin 0 -> 411 bytes
 .../jdk/internal/vm/annotation/Hidden.java    |   45 +
 .../vm/annotation/IntrinsicCandidate.class    |  Bin 0 -> 435 bytes
 .../vm/annotation/IntrinsicCandidate.java     |  125 +
 .../vm/annotation/JvmtiMountTransition.class  |  Bin 0 -> 420 bytes
 .../vm/annotation/JvmtiMountTransition.java   |   40 +
 .../vm/annotation/ReservedStackAccess.class   |  Bin 0 -> 437 bytes
 .../vm/annotation/ReservedStackAccess.java    |   52 +
 .../jdk/internal/vm/annotation/Stable.class   |  Bin 0 -> 391 bytes
 .../jdk/internal/vm/annotation/Stable.java    |   90 +
 .../VectorSupport$BinaryOperation.class       |  Bin 0 -> 816 bytes
 ...ectorSupport$CompressExpandOperation.class |  Bin 0 -> 877 bytes
 ...ctorSupport$FromBitsCoercedOperation.class |  Bin 0 -> 739 bytes
 .../vector/VectorSupport$IndexOperation.class |  Bin 0 -> 737 bytes
 ...$IndexPartiallyInUpperRangeOperation.class |  Bin 0 -> 579 bytes
 .../vector/VectorSupport$LoadOperation.class  |  Bin 0 -> 754 bytes
 ...torSupport$LoadVectorMaskedOperation.class |  Bin 0 -> 931 bytes
 ...orSupport$LoadVectorOperationWithMap.class |  Bin 0 -> 946 bytes
 .../VectorSupport$ReductionOperation.class    |  Bin 0 -> 685 bytes
 .../VectorSupport$ShuffleIotaOperation.class  |  Bin 0 -> 735 bytes
 ...ctorSupport$ShuffleToVectorOperation.class |  Bin 0 -> 709 bytes
 ...orSupport$StoreVectorMaskedOperation.class |  Bin 0 -> 744 bytes
 .../VectorSupport$StoreVectorOperation.class  |  Bin 0 -> 577 bytes
 ...rSupport$StoreVectorOperationWithMap.class |  Bin 0 -> 759 bytes
 .../VectorSupport$TernaryOperation.class      |  Bin 0 -> 823 bytes
 .../vector/VectorSupport$UnaryOperation.class |  Bin 0 -> 723 bytes
 .../vector/VectorSupport$VecExtractOp.class   |  Bin 0 -> 522 bytes
 .../vm/vector/VectorSupport$VecInsertOp.class |  Bin 0 -> 541 bytes
 .../vm/vector/VectorSupport$Vector.class      |  Bin 0 -> 740 bytes
 .../vector/VectorSupport$VectorBlendOp.class  |  Bin 0 -> 769 bytes
 .../VectorSupport$VectorBroadcastIntOp.class  |  Bin 0 -> 737 bytes
 .../VectorSupport$VectorCompareOp.class       |  Bin 0 -> 779 bytes
 .../VectorSupport$VectorConvertOp.class       |  Bin 0 -> 833 bytes
 .../vm/vector/VectorSupport$VectorMask.class  |  Bin 0 -> 756 bytes
 .../vector/VectorSupport$VectorMaskOp.class   |  Bin 0 -> 509 bytes
 .../vector/VectorSupport$VectorPayload.class  |  Bin 0 -> 774 bytes
 .../VectorSupport$VectorRearrangeOp.class     |  Bin 0 -> 923 bytes
 .../vector/VectorSupport$VectorShuffle.class  |  Bin 0 -> 768 bytes
 .../vector/VectorSupport$VectorSpecies.class  |  Bin 0 -> 612 bytes
 .../internal/vm/vector/VectorSupport.class    |  Bin 0 -> 35765 bytes
 .../jdk/internal/vm/vector/VectorSupport.java |  738 +++
 2145 files changed, 196864 insertions(+)
 create mode 100644 tests/test_data/std/jdk/internal/ValueBased.class
 create mode 100644 tests/test_data/std/jdk/internal/ValueBased.java
 create mode 100644 tests/test_data/std/jdk/internal/access/JavaAWTAccess.class
 create mode 100644 tests/test_data/std/jdk/internal/access/JavaAWTAccess.java
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 create mode 100644 tests/test_data/std/jdk/internal/vm/vector/VectorSupport$FromBitsCoercedOperation.class
 create mode 100644 tests/test_data/std/jdk/internal/vm/vector/VectorSupport$IndexOperation.class
 create mode 100644 tests/test_data/std/jdk/internal/vm/vector/VectorSupport$IndexPartiallyInUpperRangeOperation.class
 create mode 100644 tests/test_data/std/jdk/internal/vm/vector/VectorSupport$LoadOperation.class
 create mode 100644 tests/test_data/std/jdk/internal/vm/vector/VectorSupport$LoadVectorMaskedOperation.class
 create mode 100644 tests/test_data/std/jdk/internal/vm/vector/VectorSupport$LoadVectorOperationWithMap.class
 create mode 100644 tests/test_data/std/jdk/internal/vm/vector/VectorSupport$ReductionOperation.class
 create mode 100644 tests/test_data/std/jdk/internal/vm/vector/VectorSupport$ShuffleIotaOperation.class
 create mode 100644 tests/test_data/std/jdk/internal/vm/vector/VectorSupport$ShuffleToVectorOperation.class
 create mode 100644 tests/test_data/std/jdk/internal/vm/vector/VectorSupport$StoreVectorMaskedOperation.class
 create mode 100644 tests/test_data/std/jdk/internal/vm/vector/VectorSupport$StoreVectorOperation.class
 create mode 100644 tests/test_data/std/jdk/internal/vm/vector/VectorSupport$StoreVectorOperationWithMap.class
 create mode 100644 tests/test_data/std/jdk/internal/vm/vector/VectorSupport$TernaryOperation.class
 create mode 100644 tests/test_data/std/jdk/internal/vm/vector/VectorSupport$UnaryOperation.class
 create mode 100644 tests/test_data/std/jdk/internal/vm/vector/VectorSupport$VecExtractOp.class
 create mode 100644 tests/test_data/std/jdk/internal/vm/vector/VectorSupport$VecInsertOp.class
 create mode 100644 tests/test_data/std/jdk/internal/vm/vector/VectorSupport$Vector.class
 create mode 100644 tests/test_data/std/jdk/internal/vm/vector/VectorSupport$VectorBlendOp.class
 create mode 100644 tests/test_data/std/jdk/internal/vm/vector/VectorSupport$VectorBroadcastIntOp.class
 create mode 100644 tests/test_data/std/jdk/internal/vm/vector/VectorSupport$VectorCompareOp.class
 create mode 100644 tests/test_data/std/jdk/internal/vm/vector/VectorSupport$VectorConvertOp.class
 create mode 100644 tests/test_data/std/jdk/internal/vm/vector/VectorSupport$VectorMask.class
 create mode 100644 tests/test_data/std/jdk/internal/vm/vector/VectorSupport$VectorMaskOp.class
 create mode 100644 tests/test_data/std/jdk/internal/vm/vector/VectorSupport$VectorPayload.class
 create mode 100644 tests/test_data/std/jdk/internal/vm/vector/VectorSupport$VectorRearrangeOp.class
 create mode 100644 tests/test_data/std/jdk/internal/vm/vector/VectorSupport$VectorShuffle.class
 create mode 100644 tests/test_data/std/jdk/internal/vm/vector/VectorSupport$VectorSpecies.class
 create mode 100644 tests/test_data/std/jdk/internal/vm/vector/VectorSupport.class
 create mode 100644 tests/test_data/std/jdk/internal/vm/vector/VectorSupport.java

diff --git a/tests/test_data/std/jdk/internal/ValueBased.class b/tests/test_data/std/jdk/internal/ValueBased.class
new file mode 100644
index 0000000000000000000000000000000000000000..3c220a66a29ec9aad497b53893054e452b9bdeab
GIT binary patch
literal 384
zcmaiw%}N7749EYet)um$^&}#qc<9l608d(05d0|XS`bguZ78!&XJmJ_&{y-|1Ncy4
z)`NRl@Q_I+`TvrTukVjf0Am~|bO?v}{4FvraN)F#rrK6~txKLObP2;;uXJR!TSSku
zoU@>?NjPn?+BqL|Fy2L1e<7j&<f|g%8)KO;XqsNsB;hEjTrf+Xn$pZHH)KgTyKC*9
zaA0A)yCn2h^_GOuKhlY}CR+=jlIMr?_C6+@v?Hl5792!*-d>L_FJ*kXerFMN)0as+
kA`mvjdU8yl1NHlEVO#vM{QFYdVeDcL`*rvVVhk|+0U%>;7XSbN

literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/ValueBased.java b/tests/test_data/std/jdk/internal/ValueBased.java
new file mode 100644
index 00000000..d27ab73c
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/ValueBased.java
@@ -0,0 +1,49 @@
+/*
+ * Copyright (c) 2020, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package jdk.internal;
+
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+import java.lang.annotation.Target;
+
+import static java.lang.annotation.ElementType.TYPE;
+
+/**
+ * Indicates the API declaration in question is associated with a Value Based class.
+ * References to <a href="../lang/doc-files/ValueBased.html">value-based classes</a>
+ * should produce warnings about behavior that is inconsistent with value based semantics.
+ *
+ * Note this internal annotation is handled specially by the javac compiler.
+ * To work properly with {@code --release older-release}, it requires special
+ * handling in {@code make/langtools/src/classes/build/tools/symbolgenerator/CreateSymbols.java}
+ * and {@code src/jdk.compiler/share/classes/com/sun/tools/javac/jvm/ClassReader.java}.
+ *
+ * @since 16
+ */
+@Retention(RetentionPolicy.RUNTIME)
+@Target(value={TYPE})
+public @interface ValueBased {
+}
+
diff --git a/tests/test_data/std/jdk/internal/access/JavaAWTAccess.class b/tests/test_data/std/jdk/internal/access/JavaAWTAccess.class
new file mode 100644
index 0000000000000000000000000000000000000000..bf95dad19ec5c0e9a651c69676b66a93870a19a0
GIT binary patch
literal 177
zcmX^0Z`VEs1_oyaPId++Mh3;Klx+RXypq(Syu=*+#N_1E;$nTT#Ii)k@DN8ZkDY;q
zkwG8}D5Rg0n3t~apOlrFTmlqIPc3mQD9A}Ian1+ouK)^(XlVMNE3{^0;0n$!ElN&x
p%gjk-WDr6zTo0t2jgf(off?v11_nl;U91djAQl5VkYr-u005wtE^z<=

literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/access/JavaAWTAccess.java b/tests/test_data/std/jdk/internal/access/JavaAWTAccess.java
new file mode 100644
index 00000000..a4c170ca
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/access/JavaAWTAccess.java
@@ -0,0 +1,36 @@
+/*
+ * Copyright (c) 2011, 2018, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package jdk.internal.access;
+
+public interface JavaAWTAccess {
+
+    // Returns the AppContext used for applet logging isolation, or null if
+    // no isolation is required.
+    // If there's no applet, or if the caller is a stand alone application,
+    // or running in the main app context, returns null.
+    // Otherwise, returns the AppContext of the calling applet.
+    public Object getAppletContext();
+}
diff --git a/tests/test_data/std/jdk/internal/access/JavaAWTFontAccess.class b/tests/test_data/std/jdk/internal/access/JavaAWTFontAccess.class
new file mode 100644
index 0000000000000000000000000000000000000000..c94de1d7b0e74565a2477e5cdfb3c27c13ee259b
GIT binary patch
literal 255
zcmZXP%?`m(5QWc_s-KOO@BoC3`v6u=6G=s4QDI?q)lIdUTWN=QHVY5np~Ni`65H>b
znfd1axZVJGXgRP5{bY9#v1XNPnF<+(swl)vo~659PBYE!i#Vtf+KIs;l{ylOZK6UZ
zbR)$}bzzq|kGCgQUZx9{+C+ol{M!#qtfR^32fbHJ2zIfTM@8uU4t&y$=li1-p&4YS
kJXF&-HO0=K-nhI}BM>U)HNY~qHfkuX9n=jWG)j)<6C?{pTmS$7

literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/access/JavaAWTFontAccess.java b/tests/test_data/std/jdk/internal/access/JavaAWTFontAccess.java
new file mode 100644
index 00000000..139f0245
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/access/JavaAWTFontAccess.java
@@ -0,0 +1,39 @@
+/*
+ * Copyright (c) 2014, 2018, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package jdk.internal.access;
+
+/**
+ * SharedSecrets interface used for the access from java.text.Bidi
+ */
+
+public interface JavaAWTFontAccess {
+
+    // java.awt.font.TextAttribute constants
+    public Object getTextAttributeConstant(String name);
+
+    // java.awt.font.NumericShaper
+    public void shape(Object shaper, char[] text, int start, int count);
+}
diff --git a/tests/test_data/std/jdk/internal/access/JavaBeansAccess.class b/tests/test_data/std/jdk/internal/access/JavaBeansAccess.class
new file mode 100644
index 0000000000000000000000000000000000000000..8ede588ec570792e29a59efbe8efe8442412c23c
GIT binary patch
literal 519
zcmb7B!7c<r5Pdz?jvba2u1+r2L0=>eBg9TP2q7kMacVPV%$W3Sx_iX8Irsn{C2DrD
z6C~o+?^Rd5di7r4o?ie&SoPrvY!>N*%(Ww<RVh`HkhStuJ*p8YZI33{M@L{#Feyu=
zGkI}aP~rso8M!M`={dRkDit`~I-7lpN@Z=>B4TH9orS{|W$3QtNpd<M6bO!=5*oX_
z($+^$U~M+<t0K^g^GqvO8xk1((A?iX_^<2+8;MxcnL2Tmxir<7jLXShtFmU1-L}Z*
z(yfMYc++zAVN_u6kG5vh-#df2s!c*CdCBVQ-{RP5j?xtnnByP;kJFh)7an{@9p)Dh
UG&~l$vV=Y}Q@qTtl}Tmr4twdE6#xJL

literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/access/JavaBeansAccess.java b/tests/test_data/std/jdk/internal/access/JavaBeansAccess.java
new file mode 100644
index 00000000..bcde7323
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/access/JavaBeansAccess.java
@@ -0,0 +1,50 @@
+/*
+ * Copyright (c) 2014, 2018, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package jdk.internal.access;
+
+import java.lang.reflect.Constructor;
+import java.lang.reflect.Method;
+
+public interface JavaBeansAccess {
+    /**
+     * Returns the getter method for a property of the given name
+     * @param clazz The JavaBeans class
+     * @param property The property name
+     * @return The resolved property getter method
+     * @throws Exception
+     */
+    Method getReadMethod(Class<?> clazz, String property) throws Exception;
+
+    /**
+     * Return the <b>value</b> attribute of the associated
+     * <code>@ConstructorProperties</code> annotation if that is present.
+     * @param ctr The constructor to extract the annotation value from
+     * @return The {@code value} attribute of the <code>@ConstructorProperties</code>
+     *         annotation or {@code null} if the constructor is not annotated by
+     *         this annotation or the annotation is not accessible.
+     */
+    String[] getConstructorPropertiesValue(Constructor<?> ctr);
+}
diff --git a/tests/test_data/std/jdk/internal/access/JavaIOAccess.class b/tests/test_data/std/jdk/internal/access/JavaIOAccess.class
new file mode 100644
index 0000000000000000000000000000000000000000..3647ab4f3ffb4a489ed17080149061f884763a4b
GIT binary patch
literal 165
zcmX^0Z`VEs1_oyaPId++Mh1nflx+RXypq(Syu=*+#N_1E;$nTT#Ii(Be@8Hfoq>gs
zK_Ck#qMwtPm#*)hl$DxX!pOj$oS#>mpOebSAgrP31D4Os*LQ{pS~D_m1?QI*C8xS&
mf|Lj%o2Um;%*M#T$iNJA2m=En&;nKlHV}(}9Y``UZ~y?)iz(Lt

literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/access/JavaIOAccess.java b/tests/test_data/std/jdk/internal/access/JavaIOAccess.java
new file mode 100644
index 00000000..532c1f25
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/access/JavaIOAccess.java
@@ -0,0 +1,32 @@
+/*
+ * Copyright (c) 2005, 2022, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package jdk.internal.access;
+
+import java.io.Console;
+
+public interface JavaIOAccess {
+    Console console();
+}
diff --git a/tests/test_data/std/jdk/internal/access/JavaIOFileDescriptorAccess.class b/tests/test_data/std/jdk/internal/access/JavaIOFileDescriptorAccess.class
new file mode 100644
index 0000000000000000000000000000000000000000..4ae3aded0841eaf39d1dddae50e4e80a42a29b05
GIT binary patch
literal 776
zcmbtS%SyvQ6g^Yh#@0t)zOA^mo8|*5g;Et03Ka?>-A&Umrp8IgB;vQZ@B{oP@n$eW
zk!0g0m)vva+_`7Y=hyoOfHBStlo<M}<+JI@SVWThCU+d6lxg!<ZcT4IUt9_0L|zyN
z(MUrE$_&jF;ik`}Yfcv{;lvCZO3=4^G0~70nCpiJR_~rjZb~}MCG{+Z8VQZUP{?JG
z+&q=5kz7VC5S=qr96wN^a5U-FuiqRI#$F(mffhq2+r^sxA`Fd4xSk@v#=hV(2^ogD
z3r*I{jl`pQ_rzr!yy&xh;fsM@Wahb&$4Nw2eE5ghWuE&(J*Jh&KX*^<zU6Z1)9C!y
zvopIhYJuH08957*$PsA-7|!#<)K3krGEg!okwBfYRY4VL#tdxgT0>peEo|$$gI(e`
mh+U@IBxajB>4`Qv)Y&7Xgnjxy_~{?wNaM#iA&f$x8QpIzFxoNz

literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/access/JavaIOFileDescriptorAccess.java b/tests/test_data/std/jdk/internal/access/JavaIOFileDescriptorAccess.java
new file mode 100644
index 00000000..5e627abc
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/access/JavaIOFileDescriptorAccess.java
@@ -0,0 +1,49 @@
+/*
+ * Copyright (c) 2007, 2018, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package jdk.internal.access;
+
+import java.io.FileDescriptor;
+import java.io.IOException;
+
+import jdk.internal.ref.PhantomCleanable;
+
+/*
+ * @author Chris Hegarty
+ */
+
+public interface JavaIOFileDescriptorAccess {
+    public void set(FileDescriptor fdo, int fd);
+    public int get(FileDescriptor fdo);
+    public void setAppend(FileDescriptor fdo, boolean append);
+    public boolean getAppend(FileDescriptor fdo);
+    public void close(FileDescriptor fdo) throws IOException;
+    public void registerCleanup(FileDescriptor fdo);
+    public void registerCleanup(FileDescriptor fdo, PhantomCleanable<FileDescriptor> cleanable);
+    public void unregisterCleanup(FileDescriptor fdo);
+
+    // Only valid on Windows
+    public void setHandle(FileDescriptor fdo, long handle);
+    public long getHandle(FileDescriptor fdo);
+}
diff --git a/tests/test_data/std/jdk/internal/access/JavaIOFilePermissionAccess.class b/tests/test_data/std/jdk/internal/access/JavaIOFilePermissionAccess.class
new file mode 100644
index 0000000000000000000000000000000000000000..3311e2660056cc88d2952934b2439cb5365d6100
GIT binary patch
literal 265
zcmZ{fO$x#=5QSgrPqi!21Gv>q18!XvK~RJi!~?__YHCcON%d|nJb;H1lOlqPt_J3N
zeDmh@emnuJ5QPW`;^K6nQd?1JrYPfF7(=)0#y06%Dv^omDvgn)P8t-VOE4-Nr;6#E
zrpH2XOEA{r?z5SyO`>eZ?3rLO+cim9(tp=--UbLJU(>-zo&QwPzN{-QyoO-f-Y@nC
Y`ve3X_aqRwx;^yaYlnV1GVps0KmQC(MgRZ+

literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/access/JavaIOFilePermissionAccess.java b/tests/test_data/std/jdk/internal/access/JavaIOFilePermissionAccess.java
new file mode 100644
index 00000000..48a80ec7
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/access/JavaIOFilePermissionAccess.java
@@ -0,0 +1,48 @@
+/*
+ * Copyright (c) 2016, 2018, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package jdk.internal.access;
+
+import java.io.FilePermission;
+
+public interface JavaIOFilePermissionAccess {
+
+    /**
+     * Returns a new FilePermission plus an alternative path.
+     *
+     * @param input the input
+     * @return the new FilePermission plus the alt path (as npath2)
+     *         or the input itself if no alt path is available.
+     */
+    FilePermission newPermPlusAltPath(FilePermission input);
+
+    /**
+     * Returns a new FilePermission using an alternative path.
+     *
+     * @param input the input
+     * @return the new FilePermission using the alt path (as npath)
+     *         or null if no alt path is available
+     */
+    FilePermission newPermUsingAltPath(FilePermission input);
+}
diff --git a/tests/test_data/std/jdk/internal/access/JavaIOPrintStreamAccess.class b/tests/test_data/std/jdk/internal/access/JavaIOPrintStreamAccess.class
new file mode 100644
index 0000000000000000000000000000000000000000..20538b614c9bcbdfe84b8d78b6da3a6cd5e17dc8
GIT binary patch
literal 206
zcmX^0Z`VEs1_oyaPId++Mh5Mylx+RXypq(Syu=*+#N_1E;$nTT#Ii(B|9~Q(cyLKk
zYGSS<Se%`Kg^@uZ3n;0dlbDyT@1K;Fnq0!jz><@noXyCfso?{b%gonD(rT><5k=Br
z&B(wNoL^d$oa&aDlgh{-gTp>Oka28`42%rSKo>JGFaoV-Wncrb7}$X%69WeTL8m#+

literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/access/JavaIOPrintStreamAccess.java b/tests/test_data/std/jdk/internal/access/JavaIOPrintStreamAccess.java
new file mode 100644
index 00000000..ec205e27
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/access/JavaIOPrintStreamAccess.java
@@ -0,0 +1,31 @@
+/*
+ * Copyright (c) 2020, 2022, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package jdk.internal.access;
+
+import java.io.PrintStream;
+
+public interface JavaIOPrintStreamAccess {
+    Object lock(PrintStream ps);
+}
diff --git a/tests/test_data/std/jdk/internal/access/JavaIOPrintWriterAccess.class b/tests/test_data/std/jdk/internal/access/JavaIOPrintWriterAccess.class
new file mode 100644
index 0000000000000000000000000000000000000000..c7f9370decb075616fa75978e4fbec99bdc48ef0
GIT binary patch
literal 206
zcmX^0Z`VEs1_oyaPId++Mh5Mylx+RXypq(Syu=*+#N_1E;$nTT#Ii(B|9~Q(cz97J
zP|gu7&d$KX$RLmfl+@2j%uCnzPs&P7E@5O~$;nU7W@OOR@BzzZ=IbMAwbq1)BI&SZ
yWZ(+UFD*(=b<502Wn_@SVV@qzI5tKGMh0e}iy0Ugf!4D!uz^?%>_C!<fdc?lGdckP

literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/access/JavaIOPrintWriterAccess.java b/tests/test_data/std/jdk/internal/access/JavaIOPrintWriterAccess.java
new file mode 100644
index 00000000..8be54a76
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/access/JavaIOPrintWriterAccess.java
@@ -0,0 +1,31 @@
+/*
+ * Copyright (c) 2020, 2022, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package jdk.internal.access;
+
+import java.io.PrintWriter;
+
+public interface JavaIOPrintWriterAccess {
+    Object lock(PrintWriter pw);
+}
diff --git a/tests/test_data/std/jdk/internal/access/JavaIORandomAccessFileAccess.class b/tests/test_data/std/jdk/internal/access/JavaIORandomAccessFileAccess.class
new file mode 100644
index 0000000000000000000000000000000000000000..a78ccedfd0eaf82026bf105f660e9698c2d863d3
GIT binary patch
literal 292
zcmaJ+%WlFz3>@=Hp;SWZ7xYFiZ13p>0hK^Vk(w`9HWu2D?xJL=`fVKe06wa!69fki
zJy`bGGamc=dprS{VHlxBc+0b$vMzAxbfL5{TvckNzx6Wt)GqU1)28)d3%*nlI)qU!
z3{_~iRmmo269`X!&u;3nITsw5@IGEQB<oczjxVT@q@lEK8^7KN_f9cku=p{&57xUX
xLZ9$_UA9ba6Je$PP#Ufc2rvJgJ*o9Q0--J610-K`(GwgA>PUW&7)ag1;~#9{Qyu^S

literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/access/JavaIORandomAccessFileAccess.java b/tests/test_data/std/jdk/internal/access/JavaIORandomAccessFileAccess.java
new file mode 100644
index 00000000..f6c59908
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/access/JavaIORandomAccessFileAccess.java
@@ -0,0 +1,35 @@
+/*
+ * Copyright (c) 2016, 2018, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package jdk.internal.access;
+
+import java.io.File;
+import java.io.IOException;
+import java.io.RandomAccessFile;
+
+public interface JavaIORandomAccessFileAccess {
+    public RandomAccessFile openAndDelete(File file, String mode)
+        throws IOException;
+}
diff --git a/tests/test_data/std/jdk/internal/access/JavaLangAccess.class b/tests/test_data/std/jdk/internal/access/JavaLangAccess.class
new file mode 100644
index 0000000000000000000000000000000000000000..0bc0dcae16f2431b0afba474e674bace8b226797
GIT binary patch
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/access/JavaLangAccess.java b/tests/test_data/std/jdk/internal/access/JavaLangAccess.java
new file mode 100644
index 00000000..c31e745c
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/access/JavaLangAccess.java
@@ -0,0 +1,618 @@
+/*
+ * Copyright (c) 2003, 2024, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package jdk.internal.access;
+
+import java.io.InputStream;
+import java.io.PrintStream;
+import java.lang.annotation.Annotation;
+import java.lang.foreign.MemorySegment;
+import java.lang.invoke.MethodHandle;
+import java.lang.invoke.MethodType;
+import java.lang.module.ModuleDescriptor;
+import java.lang.reflect.Executable;
+import java.lang.reflect.Method;
+import java.net.URI;
+import java.nio.charset.CharacterCodingException;
+import java.nio.charset.Charset;
+import java.security.AccessControlContext;
+import java.security.ProtectionDomain;
+import java.util.List;
+import java.util.Map;
+import java.util.Set;
+import java.util.concurrent.Callable;
+import java.util.concurrent.ConcurrentHashMap;
+import java.util.concurrent.RejectedExecutionException;
+import java.util.stream.Stream;
+
+import jdk.internal.misc.CarrierThreadLocal;
+import jdk.internal.module.ServicesCatalog;
+import jdk.internal.reflect.ConstantPool;
+import jdk.internal.vm.Continuation;
+import jdk.internal.vm.ContinuationScope;
+import jdk.internal.vm.StackableScope;
+import jdk.internal.vm.ThreadContainer;
+import sun.reflect.annotation.AnnotationType;
+import sun.nio.ch.Interruptible;
+
+public interface JavaLangAccess {
+
+    /**
+     * Returns the list of {@code Method} objects for the declared public
+     * methods of this class or interface that have the specified method name
+     * and parameter types.
+     */
+    List<Method> getDeclaredPublicMethods(Class<?> klass, String name, Class<?>... parameterTypes);
+
+    /**
+     * Return most specific method that matches name and parameterTypes.
+     */
+    Method findMethod(Class<?> klass, boolean publicOnly, String name, Class<?>... parameterTypes);
+
+    /**
+     * Return the constant pool for a class.
+     */
+    ConstantPool getConstantPool(Class<?> klass);
+
+    /**
+     * Compare-And-Set the AnnotationType instance corresponding to this class.
+     * (This method only applies to annotation types.)
+     */
+    boolean casAnnotationType(Class<?> klass, AnnotationType oldType, AnnotationType newType);
+
+    /**
+     * Get the AnnotationType instance corresponding to this class.
+     * (This method only applies to annotation types.)
+     */
+    AnnotationType getAnnotationType(Class<?> klass);
+
+    /**
+     * Get the declared annotations for a given class, indexed by their types.
+     */
+    Map<Class<? extends Annotation>, Annotation> getDeclaredAnnotationMap(Class<?> klass);
+
+    /**
+     * Get the array of bytes that is the class-file representation
+     * of this Class' annotations.
+     */
+    byte[] getRawClassAnnotations(Class<?> klass);
+
+    /**
+     * Get the array of bytes that is the class-file representation
+     * of this Class' type annotations.
+     */
+    byte[] getRawClassTypeAnnotations(Class<?> klass);
+
+    /**
+     * Get the array of bytes that is the class-file representation
+     * of this Executable's type annotations.
+     */
+    byte[] getRawExecutableTypeAnnotations(Executable executable);
+
+    /**
+     * Returns the elements of an enum class or null if the
+     * Class object does not represent an enum type;
+     * the result is uncloned, cached, and shared by all callers.
+     */
+    <E extends Enum<E>> E[] getEnumConstantsShared(Class<E> klass);
+
+    /**
+     * Set current thread's blocker field.
+     */
+    void blockedOn(Interruptible b);
+
+    /**
+     * Registers a shutdown hook.
+     *
+     * It is expected that this method with registerShutdownInProgress=true
+     * is only used to register DeleteOnExitHook since the first file
+     * may be added to the delete on exit list by the application shutdown
+     * hooks.
+     *
+     * @param slot  the slot in the shutdown hook array, whose element
+     *              will be invoked in order during shutdown
+     * @param registerShutdownInProgress true to allow the hook
+     *        to be registered even if the shutdown is in progress.
+     * @param hook  the hook to be registered
+     *
+     * @throws IllegalStateException if shutdown is in progress and
+     *         the slot is not valid to register.
+     */
+    void registerShutdownHook(int slot, boolean registerShutdownInProgress, Runnable hook);
+
+    /**
+     * Returns a new Thread with the given Runnable and an
+     * inherited AccessControlContext.
+     */
+    Thread newThreadWithAcc(Runnable target, @SuppressWarnings("removal") AccessControlContext acc);
+
+    /**
+     * Invokes the finalize method of the given object.
+     */
+    void invokeFinalize(Object o) throws Throwable;
+
+    /**
+     * Returns the ConcurrentHashMap used as a storage for ClassLoaderValue(s)
+     * associated with the given class loader, creating it if it doesn't already exist.
+     */
+    ConcurrentHashMap<?, ?> createOrGetClassLoaderValueMap(ClassLoader cl);
+
+    /**
+     * Defines a class with the given name to a class loader.
+     */
+    Class<?> defineClass(ClassLoader cl, String name, byte[] b, ProtectionDomain pd, String source);
+
+    /**
+     * Defines a class with the given name to a class loader with
+     * the given flags and class data.
+     *
+     * @see java.lang.invoke.MethodHandles.Lookup#defineClass
+     */
+    Class<?> defineClass(ClassLoader cl, Class<?> lookup, String name, byte[] b, ProtectionDomain pd, boolean initialize, int flags, Object classData);
+
+    /**
+     * Returns a class loaded by the bootstrap class loader.
+     */
+    Class<?> findBootstrapClassOrNull(String name);
+
+    /**
+     * Define a Package of the given name and module by the given class loader.
+     */
+    Package definePackage(ClassLoader cl, String name, Module module);
+
+    /**
+     * Record the non-exported packages of the modules in the given layer
+     */
+    void addNonExportedPackages(ModuleLayer layer);
+
+    /**
+     * Invalidate package access cache
+     */
+    void invalidatePackageAccessCache();
+
+    /**
+     * Defines a new module to the Java virtual machine. The module
+     * is defined to the given class loader.
+     *
+     * The URI is for information purposes only, it can be {@code null}.
+     */
+    Module defineModule(ClassLoader loader, ModuleDescriptor descriptor, URI uri);
+
+    /**
+     * Defines the unnamed module for the given class loader.
+     */
+    Module defineUnnamedModule(ClassLoader loader);
+
+    /**
+     * Updates the readability so that module m1 reads m2. The new read edge
+     * does not result in a strong reference to m2 (m2 can be GC'ed).
+     *
+     * This method is the same as m1.addReads(m2) but without a permission check.
+     */
+    void addReads(Module m1, Module m2);
+
+    /**
+     * Updates module m to read all unnamed modules.
+     */
+    void addReadsAllUnnamed(Module m);
+
+    /**
+     * Updates module m1 to export a package unconditionally.
+     */
+    void addExports(Module m1, String pkg);
+
+    /**
+     * Updates module m1 to export a package to module m2. The export does
+     * not result in a strong reference to m2 (m2 can be GC'ed).
+     */
+    void addExports(Module m1, String pkg, Module m2);
+
+    /**
+     * Updates a module m to export a package to all unnamed modules.
+     */
+    void addExportsToAllUnnamed(Module m, String pkg);
+
+    /**
+     * Updates module m1 to open a package to module m2. Opening the
+     * package does not result in a strong reference to m2 (m2 can be GC'ed).
+     */
+    void addOpens(Module m1, String pkg, Module m2);
+
+    /**
+     * Updates module m to open a package to all unnamed modules.
+     */
+    void addOpensToAllUnnamed(Module m, String pkg);
+
+    /**
+     * Updates module m to open all packages in the given sets.
+     */
+    void addOpensToAllUnnamed(Module m, Set<String> concealedPkgs, Set<String> exportedPkgs);
+
+    /**
+     * Updates module m to use a service.
+     */
+    void addUses(Module m, Class<?> service);
+
+    /**
+     * Returns true if module m reflectively exports a package to other
+     */
+    boolean isReflectivelyExported(Module module, String pn, Module other);
+
+    /**
+     * Returns true if module m reflectively opens a package to other
+     */
+    boolean isReflectivelyOpened(Module module, String pn, Module other);
+
+    /**
+     * Updates module m to allow access to restricted methods.
+     */
+    Module addEnableNativeAccess(Module m);
+
+    /**
+     * Updates module named {@code name} in layer {@code layer} to allow access to restricted methods.
+     * Returns true iff the given module exists in the given layer.
+     */
+    boolean addEnableNativeAccess(ModuleLayer layer, String name);
+
+    /**
+     * Updates all unnamed modules to allow access to restricted methods.
+     */
+    void addEnableNativeAccessToAllUnnamed();
+
+    /**
+     * Ensure that the given module has native access. If not, warn or
+     * throw exception depending on the configuration.
+     */
+    void ensureNativeAccess(Module m, Class<?> owner, String methodName, Class<?> currentClass);
+
+    /**
+     * Returns the ServicesCatalog for the given Layer.
+     */
+    ServicesCatalog getServicesCatalog(ModuleLayer layer);
+
+    /**
+     * Record that this layer has at least one module defined to the given
+     * class loader.
+     */
+    void bindToLoader(ModuleLayer layer, ClassLoader loader);
+
+    /**
+     * Returns an ordered stream of layers. The first element is the
+     * given layer, the remaining elements are its parents, in DFS order.
+     */
+    Stream<ModuleLayer> layers(ModuleLayer layer);
+
+    /**
+     * Returns a stream of the layers that have modules defined to the
+     * given class loader.
+     */
+    Stream<ModuleLayer> layers(ClassLoader loader);
+
+    /**
+     * Count the number of leading positive bytes in the range.
+     */
+    int countPositives(byte[] ba, int off, int len);
+
+    /**
+     * Constructs a new {@code String} by decoding the specified subarray of
+     * bytes using the specified {@linkplain java.nio.charset.Charset charset}.
+     *
+     * The caller of this method shall relinquish and transfer the ownership of
+     * the byte array to the callee since the later will not make a copy.
+     *
+     * @param bytes the byte array source
+     * @param cs the Charset
+     * @return the newly created string
+     * @throws CharacterCodingException for malformed or unmappable bytes
+     */
+    String newStringNoRepl(byte[] bytes, Charset cs) throws CharacterCodingException;
+
+    /**
+     * Encode the given string into a sequence of bytes using the specified Charset.
+     *
+     * This method avoids copying the String's internal representation if the input
+     * is ASCII.
+     *
+     * This method throws CharacterCodingException instead of replacing when
+     * malformed input or unmappable characters are encountered.
+     *
+     * @param s the string to encode
+     * @param cs the charset
+     * @return the encoded bytes
+     * @throws CharacterCodingException for malformed input or unmappable characters
+     */
+    byte[] getBytesNoRepl(String s, Charset cs) throws CharacterCodingException;
+
+    /**
+     * Returns a new string by decoding from the given utf8 bytes array.
+     *
+     * @param off the index of the first byte to decode
+     * @param len the number of bytes to decode
+     * @return the newly created string
+     * @throws IllegalArgumentException for malformed or unmappable bytes.
+     */
+    String newStringUTF8NoRepl(byte[] bytes, int off, int len);
+
+    /**
+     * Get the char at index in a byte[] in internal UTF-16 representation,
+     * with no bounds checks.
+     *
+     * @param bytes the UTF-16 encoded bytes
+     * @param index of the char to retrieve, 0 <= index < (bytes.length >> 1)
+     * @return the char value
+     */
+    char getUTF16Char(byte[] bytes, int index);
+
+    /**
+     * Put the char at index in a byte[] in internal UTF-16 representation,
+     * with no bounds checks.
+     *
+     * @param bytes the UTF-16 encoded bytes
+     * @param index of the char to retrieve, 0 <= index < (bytes.length >> 1)
+     */
+    void putCharUTF16(byte[] bytes, int index, int ch);
+
+    /**
+     * Encode the given string into a sequence of bytes using utf8.
+     *
+     * @param s the string to encode
+     * @return the encoded bytes in utf8
+     * @throws IllegalArgumentException for malformed surrogates
+     */
+    byte[] getBytesUTF8NoRepl(String s);
+
+    /**
+     * Inflated copy from byte[] to char[], as defined by StringLatin1.inflate
+     */
+    void inflateBytesToChars(byte[] src, int srcOff, char[] dst, int dstOff, int len);
+
+    /**
+     * Decodes ASCII from the source byte array into the destination
+     * char array.
+     *
+     * @return the number of bytes successfully decoded, at most len
+     */
+    int decodeASCII(byte[] src, int srcOff, char[] dst, int dstOff, int len);
+
+    /**
+     * Returns the initial `System.in` to determine if it is replaced
+     * with `System.setIn(newIn)` method
+     */
+    InputStream initialSystemIn();
+
+    /**
+     * Returns the initial value of System.err.
+     */
+    PrintStream initialSystemErr();
+
+    /**
+     * Encodes ASCII codepoints as possible from the source array into
+     * the destination byte array, assuming that the encoding is ASCII
+     * compatible
+     *
+     * @return the number of bytes successfully encoded, or 0 if none
+     */
+    int encodeASCII(char[] src, int srcOff, byte[] dst, int dstOff, int len);
+
+    /**
+     * Set the cause of Throwable
+     * @param cause set t's cause to new value
+     */
+    void setCause(Throwable t, Throwable cause);
+
+    /**
+     * Get protection domain of the given Class
+     */
+    ProtectionDomain protectionDomain(Class<?> c);
+
+    /**
+     * Get a method handle of string concat helper method
+     */
+    MethodHandle stringConcatHelper(String name, MethodType methodType);
+
+    /**
+     * Prepends constant and the stringly representation of value into buffer,
+     * given the coder and final index. Index is measured in chars, not in bytes!
+     */
+    long stringConcatHelperPrepend(long indexCoder, byte[] buf, String value);
+
+    /**
+     * Get the string concat initial coder
+     */
+    long stringConcatInitialCoder();
+
+    /**
+     * Update lengthCoder for constant
+     */
+    long stringConcatMix(long lengthCoder, String constant);
+
+    /**
+     * Mix value length and coder into current length and coder.
+     */
+    long stringConcatMix(long lengthCoder, char value);
+
+    /**
+     * Join strings
+     */
+    String join(String prefix, String suffix, String delimiter, String[] elements, int size);
+
+    /*
+     * Get the class data associated with the given class.
+     * @param c the class
+     * @see java.lang.invoke.MethodHandles.Lookup#defineHiddenClass(byte[], boolean, MethodHandles.Lookup.ClassOption...)
+     */
+    Object classData(Class<?> c);
+
+    int stringSize(long i);
+
+    int getCharsLatin1(long i, int index, byte[] buf);
+
+    int getCharsUTF16(long i, int index, byte[] buf);
+
+    long findNative(ClassLoader loader, String entry);
+
+    /**
+     * Direct access to Shutdown.exit to avoid security manager checks
+     * @param statusCode the status code
+     */
+    void exit(int statusCode);
+
+    /**
+     * Returns an array of all platform threads.
+     */
+    Thread[] getAllThreads();
+
+    /**
+     * Returns the ThreadContainer for a thread, may be null.
+     */
+    ThreadContainer threadContainer(Thread thread);
+
+    /**
+     * Starts a thread in the given ThreadContainer.
+     */
+    void start(Thread thread, ThreadContainer container);
+
+    /**
+     * Returns the top of the given thread's stackable scope stack.
+     */
+    StackableScope headStackableScope(Thread thread);
+
+    /**
+     * Sets the top of the current thread's stackable scope stack.
+     */
+    void setHeadStackableScope(StackableScope scope);
+
+    /**
+     * Returns the Thread object for the current platform thread. If the
+     * current thread is a virtual thread then this method returns the carrier.
+     */
+    Thread currentCarrierThread();
+
+    /**
+     * Executes the given value returning task on the current carrier thread.
+     */
+    <V> V executeOnCarrierThread(Callable<V> task) throws Exception;
+
+    /**
+     * Returns the value of the current carrier thread's copy of a thread-local.
+     */
+    <T> T getCarrierThreadLocal(CarrierThreadLocal<T> local);
+
+    /**
+     * Sets the value of the current carrier thread's copy of a thread-local.
+     */
+    <T> void setCarrierThreadLocal(CarrierThreadLocal<T> local, T value);
+
+    /**
+     * Removes the value of the current carrier thread's copy of a thread-local.
+     */
+    void removeCarrierThreadLocal(CarrierThreadLocal<?> local);
+
+    /**
+     * Returns {@code true} if there is a value in the current carrier thread's copy of
+     * thread-local, even if that values is {@code null}.
+     */
+    boolean isCarrierThreadLocalPresent(CarrierThreadLocal<?> local);
+
+    /**
+     * Returns the current thread's scoped values cache
+     */
+    Object[] scopedValueCache();
+
+    /**
+     * Sets the current thread's scoped values cache
+     */
+    void setScopedValueCache(Object[] cache);
+
+    /**
+     * Return the current thread's scoped value bindings.
+     */
+    Object scopedValueBindings();
+
+    /**
+     * Returns the innermost mounted continuation
+     */
+    Continuation getContinuation(Thread thread);
+
+    /**
+     * Sets the innermost mounted continuation
+     */
+    void setContinuation(Thread thread, Continuation continuation);
+
+    /**
+     * The ContinuationScope of virtual thread continuations
+     */
+    ContinuationScope virtualThreadContinuationScope();
+
+    /**
+     * Parks the current virtual thread.
+     * @throws WrongThreadException if the current thread is not a virtual thread
+     */
+    void parkVirtualThread();
+
+    /**
+     * Parks the current virtual thread for up to the given waiting time.
+     * @param nanos the maximum number of nanoseconds to wait
+     * @throws WrongThreadException if the current thread is not a virtual thread
+     */
+    void parkVirtualThread(long nanos);
+
+    /**
+     * Re-enables a virtual thread for scheduling. If the thread was parked then
+     * it will be unblocked, otherwise its next attempt to park will not block
+     * @param thread the virtual thread to unpark
+     * @throws IllegalArgumentException if the thread is not a virtual thread
+     * @throws RejectedExecutionException if the scheduler cannot accept a task
+     */
+    void unparkVirtualThread(Thread thread);
+
+    /**
+     * Creates a new StackWalker
+     */
+    StackWalker newStackWalkerInstance(Set<StackWalker.Option> options,
+                                       ContinuationScope contScope,
+                                       Continuation continuation);
+    /**
+     * Returns '<loader-name>' @<id> if classloader has a name
+     * explicitly set otherwise <qualified-class-name> @<id>
+     */
+    String getLoaderNameID(ClassLoader loader);
+
+    /**
+     * Copy the string bytes to an existing segment, avoiding intermediate copies.
+     */
+    void copyToSegmentRaw(String string, MemorySegment segment, long offset);
+
+    /**
+     * Are the string bytes compatible with the given charset?
+     */
+    boolean bytesCompatible(String string, Charset charset);
+
+    /**
+     * Is a security manager already set or allowed to be set
+     * (using -Djava.security.manager=allow)?
+     */
+    boolean allowSecurityManager();
+}
diff --git a/tests/test_data/std/jdk/internal/access/JavaLangInvokeAccess.class b/tests/test_data/std/jdk/internal/access/JavaLangInvokeAccess.class
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diff --git a/tests/test_data/std/jdk/internal/access/JavaLangInvokeAccess.java b/tests/test_data/std/jdk/internal/access/JavaLangInvokeAccess.java
new file mode 100644
index 00000000..56387038
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/access/JavaLangInvokeAccess.java
@@ -0,0 +1,173 @@
+/*
+ * Copyright (c) 2015, 2023, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package jdk.internal.access;
+
+import jdk.internal.foreign.abi.NativeEntryPoint;
+
+import java.lang.invoke.MethodHandle;
+import java.lang.invoke.MethodHandles.Lookup;
+import java.lang.invoke.MethodType;
+import java.lang.invoke.VarHandle;
+import java.lang.reflect.Constructor;
+import java.lang.reflect.Field;
+import java.nio.ByteOrder;
+import java.util.List;
+import java.util.Map;
+import java.util.stream.Stream;
+
+public interface JavaLangInvokeAccess {
+    /**
+     * Returns the declaring class for the given ResolvedMethodName.
+     * Used by {@code StackFrameInfo}.
+     */
+    Class<?> getDeclaringClass(Object rmname);
+
+    /**
+     * Returns the {@code MethodType} for the given method descriptor
+     * and class loader.
+     * Used by {@code StackFrameInfo}.
+     */
+    MethodType getMethodType(String descriptor, ClassLoader loader);
+
+    /**
+     * Returns true if the given flags has MN_CALLER_SENSITIVE flag set.
+     */
+    boolean isCallerSensitive(int flags);
+
+    /**
+     * Returns true if the given flags has MN_HIDDEN_MEMBER flag set.
+     */
+    boolean isHiddenMember(int flags);
+
+    /**
+     * Returns a map of class name in internal forms to its corresponding
+     * class bytes per the given stream of LF_RESOLVE and SPECIES_RESOLVE
+     * trace logs. Used by GenerateJLIClassesPlugin to enable generation
+     * of such classes during the jlink phase.
+     */
+    Map<String, byte[]> generateHolderClasses(Stream<String> traces);
+
+    /**
+     * Returns a var handle view of a given memory segment.
+     * Used by {@code jdk.internal.foreign.LayoutPath} and
+     * {@code java.lang.invoke.MethodHandles}.
+     */
+    VarHandle memorySegmentViewHandle(Class<?> carrier, long alignmentMask, ByteOrder order);
+
+    /**
+     * Var handle carrier combinator.
+     * Used by {@code java.lang.invoke.MethodHandles}.
+     */
+    VarHandle filterValue(VarHandle target, MethodHandle filterToTarget, MethodHandle filterFromTarget);
+
+    /**
+     * Var handle filter coordinates combinator.
+     * Used by {@code java.lang.invoke.MethodHandles}.
+     */
+    VarHandle filterCoordinates(VarHandle target, int pos, MethodHandle... filters);
+
+    /**
+     * Var handle drop coordinates combinator.
+     * Used by {@code java.lang.invoke.MethodHandles}.
+     */
+    VarHandle dropCoordinates(VarHandle target, int pos, Class<?>... valueTypes);
+
+    /**
+     * Var handle permute coordinates combinator.
+     * Used by {@code java.lang.invoke.MethodHandles}.
+     */
+    VarHandle permuteCoordinates(VarHandle target, List<Class<?>> newCoordinates, int... reorder);
+
+    /**
+     * Var handle collect coordinates combinator.
+     * Used by {@code java.lang.invoke.MethodHandles}.
+     */
+    VarHandle collectCoordinates(VarHandle target, int pos, MethodHandle filter);
+
+    /**
+     * Var handle insert coordinates combinator.
+     * Used by {@code java.lang.invoke.MethodHandles}.
+     */
+    VarHandle insertCoordinates(VarHandle target, int pos, Object... values);
+
+    /**
+     * Returns a native method handle with given arguments as fallback and steering info.
+     *
+     * Will allow JIT to intrinsify.
+     *
+     * @param nep the native entry point
+     * @return the native method handle
+     */
+    MethodHandle nativeMethodHandle(NativeEntryPoint nep);
+
+    /**
+     * Produces a method handle unreflecting from a {@code Constructor} with
+     * the trusted lookup
+     */
+    MethodHandle unreflectConstructor(Constructor<?> ctor) throws IllegalAccessException;
+
+    /**
+     * Produces a method handle unreflecting from a {@code Field} with
+     * the trusted lookup
+     */
+    MethodHandle unreflectField(Field field, boolean isSetter) throws IllegalAccessException;
+
+    /**
+     * Produces a method handle of a virtual method with the trusted lookup.
+     */
+    MethodHandle findVirtual(Class<?> defc, String name, MethodType type) throws IllegalAccessException;
+
+    /**
+     * Produces a method handle of a static method with the trusted lookup.
+     */
+    MethodHandle findStatic(Class<?> defc, String name, MethodType type) throws IllegalAccessException;
+
+    /**
+     * Returns a method handle of an invoker class injected for core reflection
+     * implementation with the following signature:
+     *     reflect_invoke_V(MethodHandle mh, Object target, Object[] args)
+     *
+     * The invoker class is a hidden class which has the same
+     * defining class loader, runtime package, and protection domain
+     * as the given caller class.
+     */
+    MethodHandle reflectiveInvoker(Class<?> caller);
+
+    /**
+     * A best-effort method that tries to find any exceptions thrown by the given method handle.
+     * @param handle the handle to check
+     * @return an array of exceptions, or {@code null}.
+     */
+    Class<?>[] exceptionTypes(MethodHandle handle);
+
+    /**
+     * Returns a method handle that allocates an instance of the given class
+     * and then invoke the given constructor of one of its superclasses.
+     *
+     * This method should only be used by ReflectionFactory::newConstructorForSerialization.
+     */
+    MethodHandle serializableConstructor(Class<?> decl, Constructor<?> ctorToCall) throws IllegalAccessException;
+}
diff --git a/tests/test_data/std/jdk/internal/access/JavaLangModuleAccess.class b/tests/test_data/std/jdk/internal/access/JavaLangModuleAccess.class
new file mode 100644
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znwSaM_}4`!Hmsf91+!`u=_1qdeUpxReT};hDgwPrhC!{IuGu!V6}UlQwEofxsZy_w
z!81yMaRP%arxQ^8cb5XU2#mEf;O8{HK7y*Dz-=khpirP`&{g0bfvMK32J`vy3OtaK
z!!P<6r{7axTFQ`LhZVo4z+(cFt*J(Dt_sW&7;bInRWkw|UaP=7feA??L6k+QL<F@B
z6A^Sf2@p7le-!}q;?utaIuR>~4nPWV7j$#ngSZzCbKHmc2=sG&6!9?_;P|+QPjGw^
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/access/JavaLangModuleAccess.java b/tests/test_data/std/jdk/internal/access/JavaLangModuleAccess.java
new file mode 100644
index 00000000..608dfb84
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/access/JavaLangModuleAccess.java
@@ -0,0 +1,140 @@
+/*
+ * Copyright (c) 2015, 2018, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package jdk.internal.access;
+
+import java.io.PrintStream;
+import java.lang.module.Configuration;
+import java.lang.module.ModuleDescriptor;
+import java.lang.module.ModuleDescriptor.Exports;
+import java.lang.module.ModuleDescriptor.Opens;
+import java.lang.module.ModuleDescriptor.Requires;
+import java.lang.module.ModuleDescriptor.Provides;
+import java.lang.module.ModuleDescriptor.Version;
+import java.lang.module.ModuleFinder;
+import java.util.Collection;
+import java.util.List;
+import java.util.Map;
+import java.util.Set;
+
+/**
+ * Provides access to non-public methods in java.lang.module.
+ */
+
+public interface JavaLangModuleAccess {
+
+    /**
+     * Creates a builder for building a module with the given module name.
+     *
+     * @param strict
+     *        Indicates whether module names are checked or not
+     */
+    ModuleDescriptor.Builder newModuleBuilder(String mn,
+                                              boolean strict,
+                                              Set<ModuleDescriptor.Modifier> ms);
+
+    /**
+     * Returns a snapshot of the packages in the module.
+     */
+    Set<String> packages(ModuleDescriptor.Builder builder);
+
+    /**
+     * Adds a dependence on a module with the given (possibly un-parsable)
+     * version string.
+     */
+    void requires(ModuleDescriptor.Builder builder,
+                  Set<Requires.Modifier> ms,
+                  String mn,
+                  String rawCompiledVersion);
+
+    /**
+     * Returns a {@code ModuleDescriptor.Requires} of the given modifiers
+     * and module name.
+     */
+    Requires newRequires(Set<Requires.Modifier> ms, String mn, Version v);
+
+    /**
+     * Returns an unqualified {@code ModuleDescriptor.Exports}
+     * of the given modifiers and package name source.
+     */
+    Exports newExports(Set<Exports.Modifier> ms,
+                       String source);
+
+    /**
+     * Returns a qualified {@code ModuleDescriptor.Exports}
+     * of the given modifiers, package name source and targets.
+     */
+    Exports newExports(Set<Exports.Modifier> ms,
+                       String source,
+                       Set<String> targets);
+
+    /**
+     * Returns an unqualified {@code ModuleDescriptor.Opens}
+     * of the given modifiers and package name source.
+     */
+    Opens newOpens(Set<Opens.Modifier> ms, String source);
+
+    /**
+     * Returns a qualified {@code ModuleDescriptor.Opens}
+     * of the given modifiers, package name source and targets.
+     */
+    Opens newOpens(Set<Opens.Modifier> ms, String source, Set<String> targets);
+
+    /**
+     * Returns a {@code ModuleDescriptor.Provides}
+     * of the given service name and providers.
+     */
+    Provides newProvides(String service, List<String> providers);
+
+    /**
+     * Returns a new {@code ModuleDescriptor} instance.
+     */
+    ModuleDescriptor newModuleDescriptor(String name,
+                                         Version version,
+                                         Set<ModuleDescriptor.Modifier> ms,
+                                         Set<Requires> requires,
+                                         Set<Exports> exports,
+                                         Set<Opens> opens,
+                                         Set<String> uses,
+                                         Set<Provides> provides,
+                                         Set<String> packages,
+                                         String mainClass,
+                                         int hashCode);
+
+    /**
+     * Resolves a collection of root modules, with service binding
+     * and the empty configuration as the parent.
+     */
+    Configuration resolveAndBind(ModuleFinder finder,
+                                 Collection<String> roots,
+                                 PrintStream traceOutput);
+
+    /**
+     * Creates a configuration from a pre-generated readability graph.
+     */
+    Configuration newConfiguration(ModuleFinder finder,
+                                   Map<String, Set<String>> graph);
+
+}
diff --git a/tests/test_data/std/jdk/internal/access/JavaLangRefAccess.class b/tests/test_data/std/jdk/internal/access/JavaLangRefAccess.class
new file mode 100644
index 0000000000000000000000000000000000000000..209408f7dc65a8c289769883d889317b048044f3
GIT binary patch
literal 443
zcmaiwPfx-?5XIjhQb82dL=z9jiwRup-4YUFB+(H6(RlE-mI1etE!l3t_|ZK00sK(L
zDH_mt@U$<#dGmH=-alU70GwjSLxFG<51xE&99yHtzKSAFQ~yFuRZp4GEe|_$;-N^W
z$AbN_aR2Hd=ExDMsZ-X4kCxRSC9E`>cZB_!(yp6W>1N9&;%l4avD%F0mU}|w>^b6z
z(}_tvtP>8F(dYRrHk&veEKG!&%}iIzi26n4ZG=6;vrExaUi@>DamIwhMzgofvpn>F
zI|4$vuSZ6?%!)l|g(pA!U#kV}e?nSe7_=p+(oZrQaaWHeYWL6Kj`KlE1X)~;4ix2%
ht0;*ecvur&&Z)c=A=U571~!G%q*6d#)Ye>We*&1gdFTKD

literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/access/JavaLangRefAccess.java b/tests/test_data/std/jdk/internal/access/JavaLangRefAccess.java
new file mode 100644
index 00000000..ed9967ec
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/access/JavaLangRefAccess.java
@@ -0,0 +1,60 @@
+/*
+ * Copyright (c) 2014, 2022, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package jdk.internal.access;
+
+import java.lang.ref.ReferenceQueue;
+
+public interface JavaLangRefAccess {
+
+    /**
+     * Starts the Finalizer and Reference Handler threads.
+     */
+    void startThreads();
+
+    /**
+     * Wait for progress in {@link java.lang.ref.Reference}
+     * processing.  If there aren't any pending {@link
+     * java.lang.ref.Reference}s, return immediately.
+     *
+     * @return {@code true} if there were any pending
+     * {@link java.lang.ref.Reference}s, {@code false} otherwise.
+     */
+    boolean waitForReferenceProcessing() throws InterruptedException;
+
+    /**
+     * Runs the finalization methods of any objects pending finalization.
+     *
+     * Invoked by Runtime.runFinalization()
+     */
+    void runFinalization();
+
+    /**
+     * Constructs a new NativeReferenceQueue.
+     *
+     * Invoked by jdk.internal.util.ReferencedKeyMap
+     */
+    <T> ReferenceQueue<T> newNativeReferenceQueue();
+}
diff --git a/tests/test_data/std/jdk/internal/access/JavaLangReflectAccess.class b/tests/test_data/std/jdk/internal/access/JavaLangReflectAccess.class
new file mode 100644
index 0000000000000000000000000000000000000000..2c558e5b05c48cb28b2c12c6f6f9b45c4b3af86e
GIT binary patch
literal 2753
zcmbVOZBx@g5Z*(jP?T2%K~!D@DJVhSRMKIj9hfPiIJBcP_KQb)lweGlBt`fi{u)2{
z1N>2ro6FmUTn+f4)7jhSo_%)rZZE(8{QLy~WhmyLgFxY=@m0}Hm)RyY6sl>=ag<$p
zM)#=MJYYu#)7&k-nuD7J`cKfM80b^>4^PlXpx0#I%a-Z5c1v?Dn}9jD7o*AsbsV*R
zg_TN0099REH=Am`R4)~TW!o2|2=P<`-BrD5QnzI@0zZni4Pk>XQr%2RD%NW1W?ENq
zzRlu)s`JAT7-%y09dnPZhF?stPFtd=Ff$*dV$xz?lHQO4Qy*~ByrqBeUWvBwk-#tt
z7OEVEB=A<oE+E@U7a$=S>VKcX=JlgZE#!p5SP+Saz+OfqRbCnim+IALKZDK_em%ws
ztoZgh(^@V)G+6E8lx>-&<x*F-%+iI+90F6apz$8HP%jY}Om?nnSa?aLJB8fTLWRJL
zj9vioW*~0lQiS;Stz<BGy^ID(aK{O(XY2|NL3-n8Qb=4ctkrY|sb8$w3=|LTRdp&E
z>I1duH-=L)5pxnjaXYHV)Mkwc>2(x!Ez2Utn^2ZeB7b@kSiANnPdEXYpzU*woqC5V
z5R})f(+hv>v}r{=lcE+R2NFi=H5ffA3ryV}?T*fj27y(XeC|seh>+Cx5a{zLg!4z>
zjf_Y@Na;jBfiKw)M5sg9=+ANS^tJ^N$l)<Ku)J%xE7R+bKOHZ5@H)w8Qy>CMN#&t{
z6moM8-?jq&2n^{?&2Bj^YwYOwz6b3Xm#GTc@tHsmKIj#E&#9^5gZfDZ7Ali?LxY4;
zCs@odz!1nsC(+5lDuIc3G*k?OHL2mJ7Qu3`o<wnxuFglKfO<t>A?6C}R58yijYDhH
z<`*@%2Lz6im6d%oge*el=}(9@>GL7N`;o6&En8zdx`CA)+r{gY`pjDNly?#!a05Tn
z0EY0Z>lSpPokObwy3p>1Ja}JYJ#d@<-+|u9--qk{Fc8^;Xb-_%j=KlL(fSCk--pr2
z9z**9j7RoEv>#ovAHziCpG5!EC3_m4@HjKU|13P^_8b(Vee<|)0iH$nbF>#h;kYGu
Zff+7io?V#z3ar7)AnVtN-{ASHe*u3WX=MNa

literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/access/JavaLangReflectAccess.java b/tests/test_data/std/jdk/internal/access/JavaLangReflectAccess.java
new file mode 100644
index 00000000..f49221e4
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/access/JavaLangReflectAccess.java
@@ -0,0 +1,108 @@
+/*
+ * Copyright (c) 2001, 2023, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package jdk.internal.access;
+
+import java.lang.reflect.*;
+import jdk.internal.reflect.*;
+
+/** An interface which gives privileged packages Java-level access to
+    internals of java.lang.reflect. */
+
+public interface JavaLangReflectAccess {
+    /** Creates a new java.lang.reflect.Constructor. Access checks as
+      per java.lang.reflect.AccessibleObject are not overridden. */
+    public <T> Constructor<T> newConstructor(Class<T> declaringClass,
+                                             Class<?>[] parameterTypes,
+                                             Class<?>[] checkedExceptions,
+                                             int modifiers,
+                                             int slot,
+                                             String signature,
+                                             byte[] annotations,
+                                             byte[] parameterAnnotations);
+
+    /** Gets the MethodAccessor object for a java.lang.reflect.Method */
+    public MethodAccessor getMethodAccessor(Method m);
+
+    /** Sets the MethodAccessor object for a java.lang.reflect.Method */
+    public void setMethodAccessor(Method m, MethodAccessor accessor);
+
+    /** Gets the ConstructorAccessor object for a
+        java.lang.reflect.Constructor */
+    public ConstructorAccessor getConstructorAccessor(Constructor<?> c);
+
+    /** Sets the ConstructorAccessor object for a
+        java.lang.reflect.Constructor */
+    public void setConstructorAccessor(Constructor<?> c,
+                                       ConstructorAccessor accessor);
+
+    /** Gets the byte[] that encodes TypeAnnotations on an Executable. */
+    public byte[] getExecutableTypeAnnotationBytes(Executable ex);
+
+    /** Gets the "slot" field from a Constructor (used for serialization) */
+    public int getConstructorSlot(Constructor<?> c);
+
+    /** Gets the "signature" field from a Constructor (used for serialization) */
+    public String getConstructorSignature(Constructor<?> c);
+
+    /** Gets the "annotations" field from a Constructor (used for serialization) */
+    public byte[] getConstructorAnnotations(Constructor<?> c);
+
+    /** Gets the "parameterAnnotations" field from a Constructor (used for serialization) */
+    public byte[] getConstructorParameterAnnotations(Constructor<?> c);
+
+    /** Gets the shared array of parameter types of an Executable. */
+    public Class<?>[] getExecutableSharedParameterTypes(Executable ex);
+
+    /** Gets the shared array of exception types of an Executable. */
+    public Class<?>[] getExecutableSharedExceptionTypes(Executable ex);
+
+    //
+    // Copying routines, needed to quickly fabricate new Field,
+    // Method, and Constructor objects from templates
+    //
+
+    /** Makes a "child" copy of a Method */
+    public Method      copyMethod(Method arg);
+
+    /** Makes a copy of this non-root a Method */
+    public Method      leafCopyMethod(Method arg);
+
+    /** Makes a "child" copy of a Field */
+    public Field       copyField(Field arg);
+
+    /** Makes a "child" copy of a Constructor */
+    public <T> Constructor<T> copyConstructor(Constructor<T> arg);
+
+    /** Gets the root of the given AccessibleObject object; null if arg is the root */
+    public <T extends AccessibleObject> T getRoot(T obj);
+
+    /** Tests if this is a trusted final field */
+    public boolean isTrustedFinalField(Field f);
+
+    /** Returns a new instance created by the given constructor with access check */
+    public <T> T newInstance(Constructor<T> ctor, Object[] args, Class<?> caller)
+        throws IllegalAccessException, InstantiationException, InvocationTargetException;
+}
diff --git a/tests/test_data/std/jdk/internal/access/JavaNetHttpCookieAccess.class b/tests/test_data/std/jdk/internal/access/JavaNetHttpCookieAccess.class
new file mode 100644
index 0000000000000000000000000000000000000000..7ae0b1bd2255c79e7d248faffc2cc9a1c41e5eb7
GIT binary patch
literal 345
zcma)2QA)#55S*<xX=()z;HMugg6{wkK?)*L>PJrSOqckQ@KRnj9<CofKo2Eu(?CHG
z{M(t`ot@dk_ihhhiR&06!hN}^jPt_5+uGPX=e9L(_RFqWUPZRcrl}l1_k4^?!cD17
zQ(Iq{_m7fuA&j>+v`o00ug=X(g7ZbXI8mLr+N@kFDIv*R;jMH*SJHp1Jf0*xi#a<=
zpHwOOWV_)&SPU}1W`^Uv*})HCnl)X>`Nh?G|Mril562)8fpDSE0!EsAj7V{OM3^W}
LFx8rH)ibjnrH^A9

literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/access/JavaNetHttpCookieAccess.java b/tests/test_data/std/jdk/internal/access/JavaNetHttpCookieAccess.java
new file mode 100644
index 00000000..b76dbf33
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/access/JavaNetHttpCookieAccess.java
@@ -0,0 +1,44 @@
+/*
+ * Copyright (c) 2011, 2018, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package jdk.internal.access;
+
+import java.net.HttpCookie;
+import java.util.List;
+
+public interface JavaNetHttpCookieAccess {
+    /*
+     * Constructs cookies from Set-Cookie or Set-Cookie2 header string,
+     * retaining the original header String in the cookie itself.
+     */
+    public List<HttpCookie> parse(String header);
+
+    /*
+     * Returns the original header this cookie was constructed from, if it was
+     * constructed by parsing a header, otherwise null.
+     */
+    public String header(HttpCookie cookie);
+}
+
diff --git a/tests/test_data/std/jdk/internal/access/JavaNetInetAddressAccess.class b/tests/test_data/std/jdk/internal/access/JavaNetInetAddressAccess.class
new file mode 100644
index 0000000000000000000000000000000000000000..d9e1f1475f2e4a97cc9c297f4c37127386cdc1fc
GIT binary patch
literal 329
zcmX^0Z`VEs1_oyaUUmj1Mh2a%lx+RXypq(Syu=*+#N_1E;$nTT#Ii)c)Dq9U)Dp*(
zlp>&zBUpl+frXJlAPXp~pOcuEuJ50em6}|_$RM1aTH;@nnVtzW!y~`A#4j;7m61V9
z!w0MsXo^0PQP!FeVXz6oB}JKe>DG)4Jc$sC!V+^zfqJFT^qN53VXf(jQ0r7#l3L8j
zAdRNh46ZiXiIIUTIKQ+gIn^yQ2WYG;E}!XvT*}7Cz{tQ13>*dqW}rt|8Q2&=9%g6Y
T0MncdTtFE{25un9#J~dp9jslX

literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/access/JavaNetInetAddressAccess.java b/tests/test_data/std/jdk/internal/access/JavaNetInetAddressAccess.java
new file mode 100644
index 00000000..d3e0e658
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/access/JavaNetInetAddressAccess.java
@@ -0,0 +1,48 @@
+/*
+ * Copyright (c) 2015, 2021, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package jdk.internal.access;
+
+import java.net.Inet4Address;
+import java.net.Inet6Address;
+import java.net.InetAddress;
+
+public interface JavaNetInetAddressAccess {
+    /**
+     * Return the original application specified hostname of
+     * the given InetAddress object.
+     */
+    String getOriginalHostName(InetAddress ia);
+
+    /**
+     * Returns the 32-bit IPv4 address.
+     */
+    int addressValue(Inet4Address inet4Address);
+
+    /**
+     * Returns a reference to the byte[] with the IPv6 address.
+     */
+    byte[] addressBytes(Inet6Address inet6Address);
+}
diff --git a/tests/test_data/std/jdk/internal/access/JavaNetURLAccess.class b/tests/test_data/std/jdk/internal/access/JavaNetURLAccess.class
new file mode 100644
index 0000000000000000000000000000000000000000..7b1faf8ecc1010be6dde4a3bbd9e810c6a130903
GIT binary patch
literal 200
zcmZ8bOA5j;6r5MJQCDuffeS@22k1%!5h)554-nHwX^j!m=;2&=01qXm#f@$r^M?7o
z-j64M6$SzkVN&I1Sz6D|DkGKFT-S1|?rO*Wcu1EmA<!j^s=!L4Y$5ljinS*U3-%jj
zbHk1>pQf$CvX{Y`%zoa?J64ykI0@G5dUKlBrD4MOzi`nc#RNhpYy~Lv_YgM-BHRf5
E4=tBAg8%>k

literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/access/JavaNetURLAccess.java b/tests/test_data/std/jdk/internal/access/JavaNetURLAccess.java
new file mode 100644
index 00000000..0ad25d80
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/access/JavaNetURLAccess.java
@@ -0,0 +1,32 @@
+/*
+ * Copyright (c) 2017, 2018, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package jdk.internal.access;
+
+import java.net.URL;
+import java.net.URLStreamHandler;
+
+public interface JavaNetURLAccess {
+    URLStreamHandler getHandler(URL u);
+}
diff --git a/tests/test_data/std/jdk/internal/access/JavaNetUriAccess.class b/tests/test_data/std/jdk/internal/access/JavaNetUriAccess.class
new file mode 100644
index 0000000000000000000000000000000000000000..730b18d77e3b62921ed4672348515d87c835c13c
GIT binary patch
literal 205
zcmX^0Z`VEs1_oyaPId++Mh2Cvlx+RXypq(Syu=*+#N_1E;$nTT#Ii)c)RNGmOh>Q)
zI|B<NgFqHgR6i#%FJ0e1DJwO(gpq+QxhOTUB$biDM8gLm8(dP9nU`*jDWVAx%1bTL
z4-N9PW@O+B&Mz%WPIb%70h%F-ZmS;1NH#_WMh0e}gBchYfsSBhU<0uj*nuPy0|x-S
C!Z^wR

literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/access/JavaNetUriAccess.java b/tests/test_data/std/jdk/internal/access/JavaNetUriAccess.java
new file mode 100644
index 00000000..8eb95a21
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/access/JavaNetUriAccess.java
@@ -0,0 +1,35 @@
+/*
+ * Copyright (c) 2006, 2018, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package jdk.internal.access;
+
+import java.net.URI;
+
+public interface JavaNetUriAccess {
+    /**
+     * Create a URI of pre-validated scheme and path.
+     */
+    URI create(String scheme, String path);
+}
diff --git a/tests/test_data/std/jdk/internal/access/JavaNioAccess.class b/tests/test_data/std/jdk/internal/access/JavaNioAccess.class
new file mode 100644
index 0000000000000000000000000000000000000000..63ac205492cbe82aff5697d8b1328e0d69fed35f
GIT binary patch
literal 1277
zcmb_c+iuf95S=Z}rJ-rlrra;3v;~Jt{lZ%iQj-c1E1{JFeJD>`dy;N&cEj3f37^IT
zAHYW;#%sq(D@%aHi;rh^XXebA-TnFN`wswUf?a?G23rH~vn^zZT5{j!u8TonJN%r#
z7i!;F1z2QI8Ia5Nx$N7Arvr3D2Gu@>2SU?-W8CYZK2pkOux-`amr@Qz;M&KXo!O>3
z#Y((LVkaTSOAOkU(`sKWRG;(olt$5)b_a(_PrBG2q73U)Fd`>~vKwi(q)3O4M(EAl
z3@)t8{F0WZsXxkL6rzu``Z}rqS3Yah^gHCEc{Z=DPmR`m(^DRQ*J7Dw5UbbV0W#R7
z=29)pRHo|8jgF+Lq;dP6r)lI2HZnpT2E}nA2!l5nJN`jS2IW&jDVZCCSD6XZgO)7?
zgB9+68Pmb*5^teoHuYoLr_o1}CEZsM!G|-A+-oY?6B51b&=UrwGajU2IU?ecxSI)G
zI%jW%j|UjIT8u)a>&}Ve)TrX3uQ(;mTjYrB{8+}Gq6pfw6jh8DsYaP}M}3a*q#5L_
zILYc*URf!Qcptms8*#X1)mlWatHwkrV!>eDA;r?$x);r#!E#GV)J>lU0R{zlPVE11
zD+}<F<jC4Y^=6kh&wyCa0|HQ`cOeIPh~9?+6b&vx$>4QZHduxggR4+6xCZM6tFU44
z2HZ4wE5X}v$Jlohya)G<{Qw>s+)VHhY#IA8Y#ZE3a2K8svjuo+z82I7OT_pYynwy@
F(r;)LYh?fc

literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/access/JavaNioAccess.java b/tests/test_data/std/jdk/internal/access/JavaNioAccess.java
new file mode 100644
index 00000000..b34a0d42
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/access/JavaNioAccess.java
@@ -0,0 +1,144 @@
+/*
+ * Copyright (c) 2007, 2022, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package jdk.internal.access;
+
+import jdk.internal.access.foreign.UnmapperProxy;
+import jdk.internal.misc.VM.BufferPool;
+
+import java.lang.foreign.MemorySegment;
+import java.io.FileDescriptor;
+import java.nio.Buffer;
+import java.nio.ByteBuffer;
+
+public interface JavaNioAccess {
+
+    /**
+     * Used by {@code jdk.internal.misc.VM}.
+     */
+    BufferPool getDirectBufferPool();
+
+    /**
+     * Constructs a direct ByteBuffer referring to the block of memory starting
+     * at the given memory address and extending {@code cap} bytes.
+     * The {@code ob} parameter is an arbitrary object that is attached
+     * to the resulting buffer.
+     * Used by {@code jdk.internal.foreignMemorySegmentImpl}.
+     */
+    ByteBuffer newDirectByteBuffer(long addr, int cap, Object obj, MemorySegment segment);
+
+    /**
+     * Constructs a mapped ByteBuffer referring to the block of memory starting
+     * at the given memory address and extending {@code cap} bytes.
+     * The {@code ob} parameter is an arbitrary object that is attached
+     * to the resulting buffer. The {@code sync} and {@code fd} parameters of the mapped
+     * buffer are derived from the {@code UnmapperProxy}.
+     * Used by {@code jdk.internal.foreignMemorySegmentImpl}.
+     */
+    ByteBuffer newMappedByteBuffer(UnmapperProxy unmapperProxy, long addr, int cap, Object obj, MemorySegment segment);
+
+    /**
+     * Constructs an heap ByteBuffer with given backing array, offset, capacity and segment.
+     * Used by {@code jdk.internal.foreignMemorySegmentImpl}.
+     */
+    ByteBuffer newHeapByteBuffer(byte[] hb, int offset, int capacity, MemorySegment segment);
+
+    /**
+     * Used by {@code jdk.internal.foreign.Utils}.
+     */
+    Object getBufferBase(Buffer bb);
+
+    /**
+     * Used by {@code jdk.internal.foreign.Utils}.
+     */
+    long getBufferAddress(Buffer buffer);
+
+    /**
+     * Used by {@code jdk.internal.foreign.Utils}.
+     */
+    UnmapperProxy unmapper(Buffer buffer);
+
+    /**
+     * Used by {@code jdk.internal.foreign.AbstractMemorySegmentImpl} and byte buffer var handle views.
+     */
+    MemorySegment bufferSegment(Buffer buffer);
+
+    /**
+     * Used by operations to make a buffer's session non-closeable
+     * (for the duration of the operation) by acquiring the session.
+     * {@snippet lang = java:
+     * acquireSession(buffer);
+     * try {
+     *     performOperation(buffer);
+     * } finally {
+     *     releaseSession(buffer);
+     * }
+     *}
+     *
+     * @see #releaseSession(Buffer)
+     */
+    void acquireSession(Buffer buffer);
+
+    void releaseSession(Buffer buffer);
+
+    boolean isThreadConfined(Buffer buffer);
+
+    boolean hasSession(Buffer buffer);
+
+    /**
+     * Used by {@code jdk.internal.foreign.MappedMemorySegmentImpl} and byte buffer var handle views.
+     */
+    void force(FileDescriptor fd, long address, boolean isSync, long offset, long size);
+
+    /**
+     * Used by {@code jdk.internal.foreign.MappedMemorySegmentImpl} and byte buffer var handle views.
+     */
+    void load(long address, boolean isSync, long size);
+
+    /**
+     * Used by {@code jdk.internal.foreign.MappedMemorySegmentImpl}.
+     */
+    void unload(long address, boolean isSync, long size);
+
+    /**
+     * Used by {@code jdk.internal.foreign.MappedMemorySegmentImpl} and byte buffer var handle views.
+     */
+    boolean isLoaded(long address, boolean isSync, long size);
+
+    /**
+     * Used by {@code jdk.internal.foreign.NativeMemorySegmentImpl}.
+     */
+    void reserveMemory(long size, long cap);
+
+    /**
+     * Used by {@code jdk.internal.foreign.NativeMemorySegmentImpl}.
+     */
+    void unreserveMemory(long size, long cap);
+
+    /**
+     * Used by {@code jdk.internal.foreign.NativeMemorySegmentImpl}.
+     */
+    int pageSize();
+}
diff --git a/tests/test_data/std/jdk/internal/access/JavaObjectInputFilterAccess.class b/tests/test_data/std/jdk/internal/access/JavaObjectInputFilterAccess.class
new file mode 100644
index 0000000000000000000000000000000000000000..8a5242e41081ed1f52f997c17dd80baa64a3275c
GIT binary patch
literal 229
zcmX^0Z`VEs1_oyaPId++Mh5+?lx+RXypq(Syu=*+#N_1E;$nTT#Ii*Hq^#8B63@JX
z(h|4K9H6`-SdN{6g^@uZ3#dRpCowNwAEJzrfj7A*HL)ZWqSOdzu7(dnQE*97W?s6r
zCPXMRAF2z<aBD^euHgLAqGXT>sf-K?c$}aIGMJ5#fsuh3=n)16MxcvW8Q4H926iCH
H#J~XnZCXP#

literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/access/JavaObjectInputFilterAccess.java b/tests/test_data/std/jdk/internal/access/JavaObjectInputFilterAccess.java
new file mode 100644
index 00000000..bc60cbbb
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/access/JavaObjectInputFilterAccess.java
@@ -0,0 +1,38 @@
+/*
+ * Copyright (c) 2017, 2018, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package jdk.internal.access;
+
+import java.io.ObjectInputFilter;
+
+/**
+ * Access to the alternative ObjectInputFilter.Config.createFilter2 for RMI.
+ */
+public interface JavaObjectInputFilterAccess {
+    /**
+     * Creates a filter from the pattern.
+     */
+    ObjectInputFilter createFilter2(String pattern);
+}
diff --git a/tests/test_data/std/jdk/internal/access/JavaObjectInputStreamAccess.class b/tests/test_data/std/jdk/internal/access/JavaObjectInputStreamAccess.class
new file mode 100644
index 0000000000000000000000000000000000000000..85420383876bd7263c773347c6ef06727e48d396
GIT binary patch
literal 433
zcmb7AO-lnY5PezeuB~6adJsLT2P1e~5td?MMG#!*eHvrUHqDkKEBe<w_yhb=Vs^Jk
zy$BvcX6C(lGxI*b-ai10Fia3J@bYoamGROV(wu~l&hcA%q5Ekmh0o2h_Jy~S7FmlW
z=rIh-K;W9pjCVAKfq0f;o>@z83>PPNEkji+d`%|pptgCW$+<K?orM0IS0R^PRmLUg
zGaUXF=vMgQF!T#GGvsS487}`b?&|D%HL<8_E96+|AaVT1$>+@~3<nRj@oFI_%BiWA
znK6~8c43C2wWG$h5lxwN-q`v?LZ&eT!$z<jV8Opl#E6iDtQYEA7=$Roc6d8&w2Qs)
J#{t_1z5$}*es=%>

literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/access/JavaObjectInputStreamAccess.java b/tests/test_data/std/jdk/internal/access/JavaObjectInputStreamAccess.java
new file mode 100644
index 00000000..a47add47
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/access/JavaObjectInputStreamAccess.java
@@ -0,0 +1,38 @@
+/*
+ * Copyright (c) 2017, 2018, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package jdk.internal.access;
+
+import java.io.ObjectStreamException;
+import java.io.ObjectInputStream;
+
+/**
+ * Interface to specify methods for accessing {@code ObjectInputStream}.
+ */
+@FunctionalInterface
+public interface JavaObjectInputStreamAccess {
+    void checkArray(ObjectInputStream ois, Class<?> arrayType, int arrayLength)
+        throws ObjectStreamException;
+}
diff --git a/tests/test_data/std/jdk/internal/access/JavaObjectInputStreamReadString.class b/tests/test_data/std/jdk/internal/access/JavaObjectInputStreamReadString.class
new file mode 100644
index 0000000000000000000000000000000000000000..9366ed49be6066fb54c4cb7cefe3b87454d04e81
GIT binary patch
literal 356
zcmaiwzfQwI48}i)(m?qmBqk;n23WX(F%v>mN`+LZmDsOWQ(d?^RdPW*8v_r(Lm`}`
zpl(dI@B8_)&tKmkp8y_knj#_G70XxSC2}P;80#F@wVBvAJ6#m)VlJB|&SS-PJ!8An
z%*!gpfN)kQWP+8I=~2Q+u`NO{*H0bc%dNg+mEH7O*WG(&+Wz?NcoTgob&5m6`EP$d
z{Zo{hmrdn(>;n_7{@L`lwIE!~8i{_*&%XAH!1p3$wA~=W<<2VOMqK-BL*8EG#X8Q0
g1j3$P3?TjXK89MSS`9QFAi+rU1V=d5*lH)h4;Dgai~s-t

literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/access/JavaObjectInputStreamReadString.java b/tests/test_data/std/jdk/internal/access/JavaObjectInputStreamReadString.java
new file mode 100644
index 00000000..1ae489b7
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/access/JavaObjectInputStreamReadString.java
@@ -0,0 +1,38 @@
+/*
+ * Copyright (c) 2019, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package jdk.internal.access;
+
+import java.io.IOException;
+import java.io.ObjectInputStream;
+
+/**
+ * Interface to specify methods for accessing {@code ObjectInputStream}.
+ */
+@FunctionalInterface
+public interface JavaObjectInputStreamReadString {
+    String readString(ObjectInputStream ois) throws IOException;
+}
+
diff --git a/tests/test_data/std/jdk/internal/access/JavaSecurityAccess$ProtectionDomainCache.class b/tests/test_data/std/jdk/internal/access/JavaSecurityAccess$ProtectionDomainCache.class
new file mode 100644
index 0000000000000000000000000000000000000000..66dcadec26316ea811bfe028de544308f5186031
GIT binary patch
literal 452
zcma)(O-{ow5QU#xNZL@K8^i?=q8ogGvOz)RM^!<p#NL=uad2&9J4jrO1qa|zh)G}-
z7Ifp0-i*KTd;a`-{{T>8oTDdjRy{sT;}Qj@tW;W4jPgdkswL?<nDlnuN=J9WC(_Ay
zcj4E{xKimS%CRLdu6SBn<yP|cq2d{V{!7j0<;lEl#b1)_GN#==g|&&1ca+}RpKa60
zJ@Zz?yxG6J$tFO7V(IIkX=W@59R4+X+B{oeu%MW(d`vlZ1&%ihN?>&D9EH-V7%2)I
rbX~W}WddxA{{iT6hTF){WSL{YN*}{UM}eKTj<CnI;2TWGem49Di{6Lk

literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/access/JavaSecurityAccess.class b/tests/test_data/std/jdk/internal/access/JavaSecurityAccess.class
new file mode 100644
index 0000000000000000000000000000000000000000..2dce637e2a6267d5a5d02d67e3c1097619316418
GIT binary patch
literal 1016
zcmcIj%Sr<=6uoI{$3E27_Xmiy8)t7zv5Y7cABA=yxJqZjm^w`$NsEFX;5WJO1N<oQ
zPDZMXg${_T<lcL7?(5|J<Mj;yJlJ(0N8oTAJh)sKrUZ>#>ibM<_kzyofcaC!%~RL9
z94HW|jnVH$RD|x$Xv};=U@wrp__0QdOVL++#v>Lo0?&<03&)7%ap$q1Yq70VJW1q9
zVU&#GgFTu|m}WxsqplW#(twA8nyJE4UfRRs-<Zy_0^7r3tCOjMES)rwjlk`)q?z(9
z>^S)EE|U)GAv1j?4KDmtPAC_ez<Ii>g}ZFtrRMZSgSttWa6bFr>~ptA{d?TvNdw!?
zB-Vp8v1LH^@<2|N&(2VyDBa&GKZ+GgpmNQ$xnh$M>e_)V0`0%#B~a}N!IT$Ktr<>h
zXJL6o0tE8-GXV<t*H)m2wu4p<R;^u{+hw#XP(>htHCRVX9yTnp2KD$oA~#_hZ)JPK
Hl*Q5~he1og

literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/access/JavaSecurityAccess.java b/tests/test_data/std/jdk/internal/access/JavaSecurityAccess.java
new file mode 100644
index 00000000..cb1fd49c
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/access/JavaSecurityAccess.java
@@ -0,0 +1,53 @@
+/*
+ * Copyright (c) 2010, 2021, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package jdk.internal.access;
+
+import java.security.AccessControlContext;
+import java.security.PermissionCollection;
+import java.security.PrivilegedAction;
+import java.security.ProtectionDomain;
+
+public interface JavaSecurityAccess {
+
+    <T> T doIntersectionPrivilege(PrivilegedAction<T> action,
+                                  @SuppressWarnings("removal") AccessControlContext stack,
+                                  @SuppressWarnings("removal") AccessControlContext context);
+
+    <T> T doIntersectionPrivilege(PrivilegedAction<T> action,
+                                  @SuppressWarnings("removal") AccessControlContext context);
+
+    ProtectionDomain[] getProtectDomains(@SuppressWarnings("removal") AccessControlContext context);
+
+    interface ProtectionDomainCache {
+        void put(ProtectionDomain pd, PermissionCollection pc);
+        PermissionCollection get(ProtectionDomain pd);
+    }
+
+    /**
+     * Returns the ProtectionDomainCache.
+     */
+    ProtectionDomainCache getProtectionDomainCache();
+}
diff --git a/tests/test_data/std/jdk/internal/access/JavaSecurityPropertiesAccess.class b/tests/test_data/std/jdk/internal/access/JavaSecurityPropertiesAccess.class
new file mode 100644
index 0000000000000000000000000000000000000000..2a8d1771b1c62c4fa3a39aa91d950fb9e13dd588
GIT binary patch
literal 215
zcmaJ*Jqp4w7=2&WR-GIiT-|gr?oJ{IilERFr17JqhE&p2@M;boz(a{?mu@bP2k-au
zeZ2wfFiH>+*2VQEwDs()G(sxHRV9w{AyZbh)BbsJ<(-|^Ty0x1L7y-wf<qW-b8*fJ
zR-Q1;*&nR-TAD6Gm@Ss4)?9mSM5k;B<Fu@u;=MLZnE%^cH4QO=&<ocA3Ks^58-^rc
Ggy9d`xj$zB

literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/access/JavaSecurityPropertiesAccess.java b/tests/test_data/std/jdk/internal/access/JavaSecurityPropertiesAccess.java
new file mode 100644
index 00000000..a4875f35
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/access/JavaSecurityPropertiesAccess.java
@@ -0,0 +1,32 @@
+/*
+ * Copyright (c) 2022, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package jdk.internal.access;
+
+import java.util.Properties;
+
+public interface JavaSecurityPropertiesAccess {
+    Properties getInitialProperties();
+}
diff --git a/tests/test_data/std/jdk/internal/access/JavaSecuritySignatureAccess.class b/tests/test_data/std/jdk/internal/access/JavaSecuritySignatureAccess.class
new file mode 100644
index 0000000000000000000000000000000000000000..be5097ce158364d6248de51deeafdd5c56223641
GIT binary patch
literal 678
zcmb7CO;5r=5Pb_u5x?*s=uI!KcTR+8BAQ5S!r5gz)WxzT+bxlUf6RkFz#nCtR?`H~
z1TLG*o4503-puFM`v-s?P6E^f<Rp5L#(HvAB~ockStk2xu0qneGky`8*eahp>Xx|x
zI|A(q6J(-nEFVS_(q5ottnou~X1ox1I=?R&*>4S573r)b2Kgv4`i>T>iEKt%c9S^e
z9-gNI<<yk8$&lgB#gO%`Up39VNo^KjPvC4>@Yc>%Vj?bF@dE4%T>VK~*QtI9#2XKz
z$$8o1$Bd0up0=H-S$J4jCGfVf=)jpdYi()a${NaL)1$IcI{mRXOmnB{#v~+g+W-F^
pE(=2&0s?iuDxl8iv5N-B0Y?qg&_t`m4%V<k94%uU9rLdm+TV0o*HHif

literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/access/JavaSecuritySignatureAccess.java b/tests/test_data/std/jdk/internal/access/JavaSecuritySignatureAccess.java
new file mode 100644
index 00000000..28adeaff
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/access/JavaSecuritySignatureAccess.java
@@ -0,0 +1,43 @@
+/*
+ * Copyright (c) 2019, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package jdk.internal.access;
+
+import java.security.*;
+import java.security.spec.AlgorithmParameterSpec;
+
+public interface JavaSecuritySignatureAccess {
+
+    void initVerify(Signature s, PublicKey publicKey, AlgorithmParameterSpec params)
+            throws InvalidKeyException, InvalidAlgorithmParameterException;
+
+    void initVerify(Signature s, java.security.cert.Certificate certificate,
+             AlgorithmParameterSpec params)
+             throws InvalidKeyException, InvalidAlgorithmParameterException;
+
+    void initSign(Signature s, PrivateKey privateKey,
+             AlgorithmParameterSpec params, SecureRandom random)
+             throws InvalidKeyException, InvalidAlgorithmParameterException;
+}
diff --git a/tests/test_data/std/jdk/internal/access/JavaSecuritySpecAccess.class b/tests/test_data/std/jdk/internal/access/JavaSecuritySpecAccess.class
new file mode 100644
index 0000000000000000000000000000000000000000..07a3a204c92bd80b38674e0e29d3534821c24ed5
GIT binary patch
literal 216
zcmZvWu?oUK5JYFACTb;E+KXCvA7CY-g$fn{`*X8MVz|g%BKT_-et;h(UV@Eavn;za
zZ|3!WJOQlGix3cIS#nXSDa9I{E6ps<sja^0Sh%ujd5^Ec%jO)RO&DbUr*du1>Tt@0
zOTv(I(ROXPNF>=w;~<PD`$p=%9OXPn{i+tzBcUG`m1Wtaxe!MGqvtg$BoJD@J3zik
M2VuP-@-sm91D1L|eE<Le

literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/access/JavaSecuritySpecAccess.java b/tests/test_data/std/jdk/internal/access/JavaSecuritySpecAccess.java
new file mode 100644
index 00000000..c370074a
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/access/JavaSecuritySpecAccess.java
@@ -0,0 +1,32 @@
+/*
+ * Copyright (c) 2021, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package jdk.internal.access;
+
+import java.security.spec.EncodedKeySpec;
+
+public interface JavaSecuritySpecAccess {
+    void clearEncodedKeySpec(EncodedKeySpec keySpec);
+}
diff --git a/tests/test_data/std/jdk/internal/access/JavaUtilCollectionAccess.class b/tests/test_data/std/jdk/internal/access/JavaUtilCollectionAccess.class
new file mode 100644
index 0000000000000000000000000000000000000000..7dff52aa0e62b894b25e3888affcd538e27fb2e7
GIT binary patch
literal 358
zcma)&y-Gtt5QWb~%{9@&!d6HlD2Us8L+}!kLV_t0E35V1CG2(Fh5b={H47iWhY}~T
z5r4q)%r|r9%)Gt7yaE_wzd(m@);9Obx@3aWtaM$Q7}b@2)HliU*fX0tS?{V1D6ma9
zXoV`)Zl&gTtzg0-+nA=oKP*Fz$uw06`k8Qiay$FpT%LZGve>JcjFp7m!mgZ7IT*s_
zaB}f;X!IYa;c`-r#BT6gn(NFQD`x*>8bW{JbEwVKvaCG%>)i8o_%4C4B_9Jia{Ugv
RqKmb{uIS!ZEu_C8dmqozXGZ`4

literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/access/JavaUtilCollectionAccess.java b/tests/test_data/std/jdk/internal/access/JavaUtilCollectionAccess.java
new file mode 100644
index 00000000..f88d5752
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/access/JavaUtilCollectionAccess.java
@@ -0,0 +1,33 @@
+/*
+ * Copyright (c) 2020, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package jdk.internal.access;
+
+import java.util.List;
+
+public interface JavaUtilCollectionAccess {
+    <E> List<E> listFromTrustedArray(Object[] array);
+    <E> List<E> listFromTrustedArrayNullsAllowed(Object[] array);
+}
diff --git a/tests/test_data/std/jdk/internal/access/JavaUtilConcurrentFJPAccess.class b/tests/test_data/std/jdk/internal/access/JavaUtilConcurrentFJPAccess.class
new file mode 100644
index 0000000000000000000000000000000000000000..ece6306869c75908eb7241330ed7f18f81f045d2
GIT binary patch
literal 300
zcma)&y-ou$5QJwF$c4~ELiAMmY2pW<f|IVWkcfn!cYLeJcV>-zzC2utJOB@c@TH(Z
zLbS6pqy6Ud>v#fC;<~_ypqjc>P7+5kUKwk->y$PJ^O~G5gV;VsmQ?BO!}(U=f-rBg
zL3ty4^}K7?Cc^EG_fE?2{=w3j#Py>Owk0f9PiJ$V>y-WJQ&otq4o<cq`1`dc+_2QY
v<IDfV_4<u4dkKBCTshB#yFUmv!#@)OVVrjWMj7Z56AWMlrdc6e4LWAuN<LY0

literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/access/JavaUtilConcurrentFJPAccess.java b/tests/test_data/std/jdk/internal/access/JavaUtilConcurrentFJPAccess.java
new file mode 100644
index 00000000..28c1b7fd
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/access/JavaUtilConcurrentFJPAccess.java
@@ -0,0 +1,32 @@
+/*
+ * Copyright (c) 2022, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package jdk.internal.access;
+
+import java.util.concurrent.ForkJoinPool;
+
+public interface JavaUtilConcurrentFJPAccess {
+    long beginCompensatedBlock(ForkJoinPool pool);
+    void endCompensatedBlock(ForkJoinPool pool, long post);
+}
diff --git a/tests/test_data/std/jdk/internal/access/JavaUtilConcurrentTLRAccess.class b/tests/test_data/std/jdk/internal/access/JavaUtilConcurrentTLRAccess.class
new file mode 100644
index 0000000000000000000000000000000000000000..68c4213e66671de7789b565d6f8200ea50c477fc
GIT binary patch
literal 206
zcmaKmO$x#=6oe=KwCc(uh%4QgGe|*D3WBW%cqR{RjR~Zw=+#_!01qWb58!4Pm>Ir#
zy&q2i8HOo30<zX;S=qqel98koH;vrTmG+@BnX{_(o^2@e-SU^E=n0JLSdfP7QEm@4
zs~|A7d<z9DXEphIdGbs;cZ$r8tag`zSqpS$^R>XJaIIIostgNE{;(EbOd=46@i8DG
Nx{u`RkVfrb@B!*zI_3ZX

literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/access/JavaUtilConcurrentTLRAccess.java b/tests/test_data/std/jdk/internal/access/JavaUtilConcurrentTLRAccess.java
new file mode 100644
index 00000000..5683146e
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/access/JavaUtilConcurrentTLRAccess.java
@@ -0,0 +1,30 @@
+/*
+ * Copyright (c) 2022, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package jdk.internal.access;
+
+public interface JavaUtilConcurrentTLRAccess {
+    int nextSecondaryThreadLocalRandomSeed();
+}
diff --git a/tests/test_data/std/jdk/internal/access/JavaUtilJarAccess.class b/tests/test_data/std/jdk/internal/access/JavaUtilJarAccess.class
new file mode 100644
index 0000000000000000000000000000000000000000..dcfaab98dcabe2438a155e8250c39651be17c915
GIT binary patch
literal 535
zcmaix!A=4(5QhIjU=bBjhzH}<1TOXg_Cz)iAsS3j58ldBvFoO5+OAO_&4Ul%Lm6k+
zhzTZo>13vV|M{l#{_*+-AVN1lg>alK?u9m9StC;+<5)Q-Ch}2Ud7VzA9h8*-RYE)A
zvPh*_is?L2u_qiQ(vEbhPNj=d>D-0%cLVROp66Z>4tr<io1DD_OWC-Thy5EubNCdi
z2d^{Z0&EgGrBr8PJYC%ox=ZCRZSK5Utc)FDwC;Q^jlNaRhhH5_${B;0W!PVX`0)wZ
zUm2HMH8$F7nd%o=0R2UNO=xMi(sKjCMz0vCp^UfBqs$Vbb-eGv|EFW+u<&8F<}Ax?
ztcnjN9Q<0!N%3KI0{7>I0yW-I4Ry`~&Z-<6Txnv96T&uj%Gkng8Qa)n6=9#x3Ob+g
CP@5<K

literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/access/JavaUtilJarAccess.java b/tests/test_data/std/jdk/internal/access/JavaUtilJarAccess.java
new file mode 100644
index 00000000..fb266330
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/access/JavaUtilJarAccess.java
@@ -0,0 +1,40 @@
+/*
+ * Copyright (c) 2002, 2022, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package jdk.internal.access;
+
+import java.io.IOException;
+import java.util.jar.Attributes;
+import java.util.jar.JarEntry;
+import java.util.jar.JarFile;
+import java.util.jar.Manifest;
+
+public interface JavaUtilJarAccess {
+    public boolean jarFileHasClassPathAttribute(JarFile jar) throws IOException;
+    public Attributes getTrustedAttributes(Manifest man, String name);
+    public void ensureInitialization(JarFile jar);
+    public boolean isInitializing();
+    public JarEntry entryFor(JarFile file, String name);
+}
diff --git a/tests/test_data/std/jdk/internal/access/JavaUtilResourceBundleAccess.class b/tests/test_data/std/jdk/internal/access/JavaUtilResourceBundleAccess.class
new file mode 100644
index 0000000000000000000000000000000000000000..ffd552324073b324d00cff8e922d1abe249f7e49
GIT binary patch
literal 728
zcma))%SyyB6o&td+S>6p<K+R|If%xUv#1C<;9?jrOwoO8LurjEG^xIu3m?FT64O+$
zWtiaV9FqTh=feN>{qYH4f&(8tg0nn%p_$aYluS?-$6P5oWpC_JXJXD(QI#>ju4E$k
zmHqUwN-)Tcf(j;6djFjBSQ7+_>jzeHY4Y*W%nB;Qpj}9~{AcuJDCr;N+(8*F$26nN
zikJybKpl`4qmhU82)<e5j=lb?)?OgeWhPTwTaVuyi(vlSxvg33*t}THZIM)hhtAc8
zlD~HkN^sI{G!aZGHzSC$R5D$aX2t13?Zt6x$Zo6f(hcrM)-5+#efUF{iB4;KcmxD1
q#*2VwJhcW7wYPk%+Zdp4;|4Zu+`_hvI~bU{p{eR&*JOJ(+y4QLkl>R5

literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/access/JavaUtilResourceBundleAccess.java b/tests/test_data/std/jdk/internal/access/JavaUtilResourceBundleAccess.java
new file mode 100644
index 00000000..fb8fda8f
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/access/JavaUtilResourceBundleAccess.java
@@ -0,0 +1,66 @@
+/*
+ * Copyright (c) 2015, 2018, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package jdk.internal.access;
+
+import java.util.Locale;
+import java.util.ResourceBundle;
+
+/**
+ * Provides access to non-public methods in java.util.ResourceBundle.
+ */
+public interface JavaUtilResourceBundleAccess {
+    /**
+     * Sets the bundle's parent to the given parent.
+     */
+    void setParent(ResourceBundle bundle, ResourceBundle parent);
+
+    /**
+     * Returns the parent of the given bundle or null if the bundle has no parent.
+     */
+    ResourceBundle getParent(ResourceBundle bundle);
+
+    /**
+     * Sets the bundle's locale to the given locale.
+     */
+    void setLocale(ResourceBundle bundle, Locale locale);
+
+    /**
+     * Sets the bundle's base name to the given name.
+     */
+    void setName(ResourceBundle bundle, String name);
+
+    /**
+     * Returns a {@code ResourceBundle} of the given baseName and locale
+     * loaded on behalf of the given module with no caller module
+     * access check.
+     */
+    ResourceBundle getBundle(String baseName, Locale locale, Module module);
+
+    /**
+     * Instantiates a {@code ResourceBundle} of the given bundle class.
+     */
+    ResourceBundle newResourceBundle(Class<? extends ResourceBundle> bundleClass);
+}
diff --git a/tests/test_data/std/jdk/internal/access/JavaUtilZipFileAccess.class b/tests/test_data/std/jdk/internal/access/JavaUtilZipFileAccess.class
new file mode 100644
index 0000000000000000000000000000000000000000..b645b19c01d0a816714047184e1e101e7112f766
GIT binary patch
literal 1099
zcmbVLT~AX%5S;~VDJaDv%9rxsi#H)$!)wu`F(s4~O>D%ZJ}tLH-FmwvyK@Qkr}^Ly
z@JAVD_ue#H`3U&5+1WW~&Yao#^Y_<p0QdmgWtb5V4SGLfr3sCeX)Kcjt&NZ5h5SM)
z?W*$wm14t3%P=QkdB9I`Ds?~pbUMI<1guz+hU`~G-`k_)5M>XIfQ>h8pPDgE{8OFB
z1y?=l3V7W|I+j|Up{0iIbyQzV$_#$SR1)@FP0P|kih(pN%ebd{6i~O7rMiI1ghRl)
z`{MR<9^XxejMDx3d*-SJ>ORUL3fQ@gv0F$9DFiHq1ljN(Gp0Ie38=YjB-zquCupo1
zY3_aVwu;d=hLlmWT<6i-FmKA{z@w(lhG--)HMe*4KuF<|A7r7u$>qo1tCA&yl3U!n
z4{M$rv)7DaDeVV??i5pXwv64#@(KbD{<lClQ1>Tl7O8njMmC6@Kh4OQzjXt9ZcQsX
z$p?E4Gd0*^U^yn@!7g-0nMu(7a{e_puHmj*tC9c#v%JOt3%r$&pagC^%P`OJ3P)#r
xd=Vb|_!C(2XBC$H`4noCycNbhgVo9XIp1Fd_cgw+!-mIg!WMH2c<C#=x&kNON*DkD

literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/access/JavaUtilZipFileAccess.java b/tests/test_data/std/jdk/internal/access/JavaUtilZipFileAccess.java
new file mode 100644
index 00000000..3728a6c7
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/access/JavaUtilZipFileAccess.java
@@ -0,0 +1,48 @@
+/*
+ * Copyright (c) 2013, 2021, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package jdk.internal.access;
+
+import java.util.Enumeration;
+import java.util.List;
+import java.util.jar.JarEntry;
+import java.util.jar.JarFile;
+import java.util.stream.Stream;
+import java.util.zip.ZipEntry;
+import java.util.zip.ZipFile;
+
+public interface JavaUtilZipFileAccess {
+    public boolean startsWithLocHeader(ZipFile zip);
+    public List<String> getManifestAndSignatureRelatedFiles(JarFile zip);
+    public String getManifestName(JarFile zip, boolean onlyIfSignatureRelatedFiles);
+    public int getManifestNum(JarFile zip);
+    public int[] getMetaInfVersions(JarFile zip);
+    public Enumeration<JarEntry> entries(ZipFile zip);
+    public Stream<JarEntry> stream(ZipFile zip);
+    public Stream<String> entryNameStream(ZipFile zip);
+    public void setExtraAttributes(ZipEntry ze, int extraAttrs);
+    public int getExtraAttributes(ZipEntry ze);
+}
+
diff --git a/tests/test_data/std/jdk/internal/access/JavaxCryptoSealedObjectAccess.class b/tests/test_data/std/jdk/internal/access/JavaxCryptoSealedObjectAccess.class
new file mode 100644
index 0000000000000000000000000000000000000000..ae2865cf52ab2d1d4f86495e826dab49638acdfa
GIT binary patch
literal 407
zcmaKo%}T>S6ot>N+SK}2aN$;5h;AHQXJtc$6s1C*V4Pgyq~jzcQ;9yB3m?FT5~rz@
zWaIMu@Llft{`vd@5MdHvK)B7*rO?)KWu*~PDXwcVmv6F(s`t_r2}{H2;yGvK?%FiK
zE@6`UiZIe<Vv`ZhGIq1ZZDefAl}lX3@|Ey-^{}otLbXWIWrqDI(&Y<R;dSc@UHs8I
zxR5ZOHHu583tI=+C!F`_Q<*-=G}SiS)&d+5E_<!m7|x`bnnEoT{lT5?5#h9b&!3MM
w+rZyVidCifUK=J{%>NtdW(^n;2s?gkfc$2A7<wIeHS+EVV;p*Y?DYUAzbOBFk^lez

literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/access/JavaxCryptoSealedObjectAccess.java b/tests/test_data/std/jdk/internal/access/JavaxCryptoSealedObjectAccess.java
new file mode 100644
index 00000000..0ab3c139
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/access/JavaxCryptoSealedObjectAccess.java
@@ -0,0 +1,38 @@
+/*
+ * Copyright (c) 2018, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package jdk.internal.access;
+
+import javax.crypto.BadPaddingException;
+import javax.crypto.Cipher;
+import javax.crypto.IllegalBlockSizeException;
+import javax.crypto.SealedObject;
+import java.io.IOException;
+import java.io.ObjectInputStream;
+
+public interface JavaxCryptoSealedObjectAccess {
+    ObjectInputStream getExtObjectInputStream(
+            SealedObject sealed, Cipher cipher)
+            throws BadPaddingException, IllegalBlockSizeException, IOException;
+}
diff --git a/tests/test_data/std/jdk/internal/access/JavaxCryptoSpecAccess.class b/tests/test_data/std/jdk/internal/access/JavaxCryptoSpecAccess.class
new file mode 100644
index 0000000000000000000000000000000000000000..51853c3b6eecf05dfc31c77a24c3524d9568832e
GIT binary patch
literal 211
zcmZurI|{-;5Pjn(Q7f^uwlIx*04oVts9+JWU&lcbmn3XfNv>w$0X&qrNhjDmhBxo`
z{ybj*VvIxd2vK&qsWf+Db8VDnma0-a{m^x6o6;3YDZJ^}5Cg(A^Dkv|epSbFChQ0^
zHll4JY{l)RX$^$M^3W=4#a)W3Jga^*>*z$7B*opbY*QnI`QO@An-dTSeLou@zha1>
Ky%2irVe|zrIXuGv

literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/access/JavaxCryptoSpecAccess.java b/tests/test_data/std/jdk/internal/access/JavaxCryptoSpecAccess.java
new file mode 100644
index 00000000..f8904cae
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/access/JavaxCryptoSpecAccess.java
@@ -0,0 +1,32 @@
+/*
+ * Copyright (c) 2021, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package jdk.internal.access;
+
+import javax.crypto.spec.SecretKeySpec;
+
+public interface JavaxCryptoSpecAccess {
+    void clearSecretKeySpec(SecretKeySpec keySpec);
+}
diff --git a/tests/test_data/std/jdk/internal/access/JavaxSecurityAccess.class b/tests/test_data/std/jdk/internal/access/JavaxSecurityAccess.class
new file mode 100644
index 0000000000000000000000000000000000000000..387f09ee33373181f42334774bc21ef0f73f5ea7
GIT binary patch
literal 332
zcmX^0Z`VEs1_oyaZgvJHMh5k)lx+RXypq(Syu=*+#N_1E;$nTT#InSS;MC;OqRf&?
zN3a+>0}CUAKo(F!KPNFSUEe<`D>b=<k%23*IKtGxz%Ma3m65?s!w00ILcbWQS3j||
zBtyRfs6Zd2DxfGcFFCUyF~?fdr?@l^p$w?P608Dbjx{3#Kg3kHda%)WbZ8Q5FVMlk
z`K3k4scxA$KnF`;@u?oj3v7%Gj10`caAII!0(zX4fsFwa0PGALKoLd;PLMbQ7XW!6
BU*G@$

literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/access/JavaxSecurityAccess.java b/tests/test_data/std/jdk/internal/access/JavaxSecurityAccess.java
new file mode 100644
index 00000000..004b6db3
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/access/JavaxSecurityAccess.java
@@ -0,0 +1,34 @@
+/*
+ * Copyright (c) 2024, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package jdk.internal.access;
+
+import javax.security.auth.x500.X500Principal;
+import sun.security.x509.X500Name;
+
+public interface JavaxSecurityAccess {
+    X500Name asX500Name(X500Principal p);
+    X500Principal asX500Principal(X500Name n);
+}
diff --git a/tests/test_data/std/jdk/internal/access/SharedSecrets.class b/tests/test_data/std/jdk/internal/access/SharedSecrets.class
new file mode 100644
index 0000000000000000000000000000000000000000..04123e79f8eaed67530f2bb723802e8e379cbec1
GIT binary patch
literal 17671
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HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/access/SharedSecrets.java b/tests/test_data/std/jdk/internal/access/SharedSecrets.java
new file mode 100644
index 00000000..0dacbef9
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/access/SharedSecrets.java
@@ -0,0 +1,539 @@
+/*
+ * Copyright (c) 2002, 2024, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package jdk.internal.access;
+
+import javax.crypto.SealedObject;
+import javax.crypto.spec.SecretKeySpec;
+import java.io.ObjectInputFilter;
+import java.lang.invoke.MethodHandles;
+import java.lang.module.ModuleDescriptor;
+import java.security.Security;
+import java.security.spec.EncodedKeySpec;
+import java.util.ResourceBundle;
+import java.util.concurrent.ForkJoinPool;
+import java.util.jar.JarFile;
+import java.io.Console;
+import java.io.FileDescriptor;
+import java.io.FilePermission;
+import java.io.ObjectInputStream;
+import java.io.PrintStream;
+import java.io.PrintWriter;
+import java.io.RandomAccessFile;
+import java.security.ProtectionDomain;
+import java.security.Signature;
+import javax.security.auth.x500.X500Principal;
+
+/** A repository of "shared secrets", which are a mechanism for
+    calling implementation-private methods in another package without
+    using reflection. A package-private class implements a public
+    interface and provides the ability to call package-private methods
+    within that package; the object implementing that interface is
+    provided through a third package to which access is restricted.
+    This framework avoids the primary disadvantage of using reflection
+    for this purpose, namely the loss of compile-time checking. */
+
+public class SharedSecrets {
+    private static JavaAWTAccess javaAWTAccess;
+    private static JavaAWTFontAccess javaAWTFontAccess;
+    private static JavaBeansAccess javaBeansAccess;
+    private static JavaLangAccess javaLangAccess;
+    private static JavaLangInvokeAccess javaLangInvokeAccess;
+    private static JavaLangModuleAccess javaLangModuleAccess;
+    private static JavaLangRefAccess javaLangRefAccess;
+    private static JavaLangReflectAccess javaLangReflectAccess;
+    private static JavaIOAccess javaIOAccess;
+    private static JavaIOPrintStreamAccess javaIOPrintStreamAccess;
+    private static JavaIOPrintWriterAccess javaIOPrintWriterAccess;
+    private static JavaIOFileDescriptorAccess javaIOFileDescriptorAccess;
+    private static JavaIOFilePermissionAccess javaIOFilePermissionAccess;
+    private static JavaIORandomAccessFileAccess javaIORandomAccessFileAccess;
+    private static JavaObjectInputStreamReadString javaObjectInputStreamReadString;
+    private static JavaObjectInputStreamAccess javaObjectInputStreamAccess;
+    private static JavaObjectInputFilterAccess javaObjectInputFilterAccess;
+    private static JavaNetInetAddressAccess javaNetInetAddressAccess;
+    private static JavaNetHttpCookieAccess javaNetHttpCookieAccess;
+    private static JavaNetUriAccess javaNetUriAccess;
+    private static JavaNetURLAccess javaNetURLAccess;
+    private static JavaNioAccess javaNioAccess;
+    private static JavaUtilCollectionAccess javaUtilCollectionAccess;
+    private static JavaUtilConcurrentTLRAccess javaUtilConcurrentTLRAccess;
+    private static JavaUtilConcurrentFJPAccess javaUtilConcurrentFJPAccess;
+    private static JavaUtilJarAccess javaUtilJarAccess;
+    private static JavaUtilZipFileAccess javaUtilZipFileAccess;
+    private static JavaUtilResourceBundleAccess javaUtilResourceBundleAccess;
+    private static JavaSecurityAccess javaSecurityAccess;
+    private static JavaSecurityPropertiesAccess javaSecurityPropertiesAccess;
+    private static JavaSecuritySignatureAccess javaSecuritySignatureAccess;
+    private static JavaSecuritySpecAccess javaSecuritySpecAccess;
+    private static JavaxCryptoSealedObjectAccess javaxCryptoSealedObjectAccess;
+    private static JavaxCryptoSpecAccess javaxCryptoSpecAccess;
+    private static JavaxSecurityAccess javaxSecurityAccess;
+
+    public static void setJavaUtilCollectionAccess(JavaUtilCollectionAccess juca) {
+        javaUtilCollectionAccess = juca;
+    }
+
+    public static JavaUtilCollectionAccess getJavaUtilCollectionAccess() {
+        var access = javaUtilCollectionAccess;
+        if (access == null) {
+            try {
+                Class.forName("java.util.ImmutableCollections$Access", true, null);
+                access = javaUtilCollectionAccess;
+            } catch (ClassNotFoundException e) {}
+        }
+        return access;
+    }
+
+    public static void setJavaUtilConcurrentTLRAccess(JavaUtilConcurrentTLRAccess access) {
+        javaUtilConcurrentTLRAccess = access;
+    }
+
+    public static JavaUtilConcurrentTLRAccess getJavaUtilConcurrentTLRAccess() {
+        var access = javaUtilConcurrentTLRAccess;
+        if (access == null) {
+            try {
+                Class.forName("java.util.concurrent.ThreadLocalRandom$Access", true, null);
+                access = javaUtilConcurrentTLRAccess;
+            } catch (ClassNotFoundException e) {}
+        }
+        return access;
+    }
+
+    public static void setJavaUtilConcurrentFJPAccess(JavaUtilConcurrentFJPAccess access) {
+        javaUtilConcurrentFJPAccess = access;
+    }
+
+    public static JavaUtilConcurrentFJPAccess getJavaUtilConcurrentFJPAccess() {
+        var access = javaUtilConcurrentFJPAccess;
+        if (access == null) {
+            ensureClassInitialized(ForkJoinPool.class);
+            access = javaUtilConcurrentFJPAccess;
+        }
+        return access;
+    }
+
+    public static JavaUtilJarAccess javaUtilJarAccess() {
+        var access = javaUtilJarAccess;
+        if (access == null) {
+            // Ensure JarFile is initialized; we know that this class
+            // provides the shared secret
+            ensureClassInitialized(JarFile.class);
+            access = javaUtilJarAccess;
+        }
+        return access;
+    }
+
+    public static void setJavaUtilJarAccess(JavaUtilJarAccess access) {
+        javaUtilJarAccess = access;
+    }
+
+    public static void setJavaLangAccess(JavaLangAccess jla) {
+        javaLangAccess = jla;
+    }
+
+    public static JavaLangAccess getJavaLangAccess() {
+        return javaLangAccess;
+    }
+
+    public static void setJavaLangInvokeAccess(JavaLangInvokeAccess jlia) {
+        javaLangInvokeAccess = jlia;
+    }
+
+    public static JavaLangInvokeAccess getJavaLangInvokeAccess() {
+        var access = javaLangInvokeAccess;
+        if (access == null) {
+            try {
+                Class.forName("java.lang.invoke.MethodHandleImpl", true, null);
+                access = javaLangInvokeAccess;
+            } catch (ClassNotFoundException e) {}
+        }
+        return access;
+    }
+
+    public static void setJavaLangModuleAccess(JavaLangModuleAccess jlrma) {
+        javaLangModuleAccess = jlrma;
+    }
+
+    public static JavaLangModuleAccess getJavaLangModuleAccess() {
+        var access = javaLangModuleAccess;
+        if (access == null) {
+            ensureClassInitialized(ModuleDescriptor.class);
+            access = javaLangModuleAccess;
+        }
+        return access;
+    }
+
+    public static void setJavaLangRefAccess(JavaLangRefAccess jlra) {
+        javaLangRefAccess = jlra;
+    }
+
+    public static JavaLangRefAccess getJavaLangRefAccess() {
+        return javaLangRefAccess;
+    }
+
+    public static void setJavaLangReflectAccess(JavaLangReflectAccess jlra) {
+        javaLangReflectAccess = jlra;
+    }
+
+    public static JavaLangReflectAccess getJavaLangReflectAccess() {
+        return javaLangReflectAccess;
+    }
+
+    public static void setJavaNetUriAccess(JavaNetUriAccess jnua) {
+        javaNetUriAccess = jnua;
+    }
+
+    public static JavaNetUriAccess getJavaNetUriAccess() {
+        var access = javaNetUriAccess;
+        if (access == null) {
+            ensureClassInitialized(java.net.URI.class);
+            access = javaNetUriAccess;
+        }
+        return access;
+    }
+
+    public static void setJavaNetURLAccess(JavaNetURLAccess jnua) {
+        javaNetURLAccess = jnua;
+    }
+
+    public static JavaNetURLAccess getJavaNetURLAccess() {
+        var access = javaNetURLAccess;
+        if (access == null) {
+            ensureClassInitialized(java.net.URL.class);
+            access = javaNetURLAccess;
+        }
+        return access;
+    }
+
+    public static void setJavaNetInetAddressAccess(JavaNetInetAddressAccess jna) {
+        javaNetInetAddressAccess = jna;
+    }
+
+    public static JavaNetInetAddressAccess getJavaNetInetAddressAccess() {
+        var access = javaNetInetAddressAccess;
+        if (access == null) {
+            ensureClassInitialized(java.net.InetAddress.class);
+            access = javaNetInetAddressAccess;
+        }
+        return access;
+    }
+
+    public static void setJavaNetHttpCookieAccess(JavaNetHttpCookieAccess a) {
+        javaNetHttpCookieAccess = a;
+    }
+
+    public static JavaNetHttpCookieAccess getJavaNetHttpCookieAccess() {
+        var access = javaNetHttpCookieAccess;
+        if (access == null) {
+            ensureClassInitialized(java.net.HttpCookie.class);
+            access = javaNetHttpCookieAccess;
+        }
+        return access;
+    }
+
+    public static void setJavaNioAccess(JavaNioAccess jna) {
+        javaNioAccess = jna;
+    }
+
+    public static JavaNioAccess getJavaNioAccess() {
+        var access = javaNioAccess;
+        if (access == null) {
+            // Ensure java.nio.Buffer is initialized, which provides the
+            // shared secret.
+            ensureClassInitialized(java.nio.Buffer.class);
+            access = javaNioAccess;
+        }
+        return access;
+    }
+
+    public static void setJavaIOAccess(JavaIOAccess jia) {
+        javaIOAccess = jia;
+    }
+
+    public static JavaIOAccess getJavaIOAccess() {
+        var access = javaIOAccess;
+        if (access == null) {
+            ensureClassInitialized(Console.class);
+            access = javaIOAccess;
+        }
+        return access;
+    }
+
+    public static void setJavaIOCPrintWriterAccess(JavaIOPrintWriterAccess a) {
+        javaIOPrintWriterAccess = a;
+    }
+
+    public static JavaIOPrintWriterAccess getJavaIOPrintWriterAccess() {
+        var access = javaIOPrintWriterAccess;
+        if (access == null) {
+            ensureClassInitialized(PrintWriter.class);
+            access = javaIOPrintWriterAccess;
+        }
+        return access;
+    }
+
+    public static void setJavaIOCPrintStreamAccess(JavaIOPrintStreamAccess a) {
+        javaIOPrintStreamAccess = a;
+    }
+
+    public static JavaIOPrintStreamAccess getJavaIOPrintStreamAccess() {
+        var access = javaIOPrintStreamAccess;
+        if (access == null) {
+            ensureClassInitialized(PrintStream.class);
+            access = javaIOPrintStreamAccess;
+        }
+        return access;
+    }
+
+    public static void setJavaIOFileDescriptorAccess(JavaIOFileDescriptorAccess jiofda) {
+        javaIOFileDescriptorAccess = jiofda;
+    }
+
+    public static JavaIOFilePermissionAccess getJavaIOFilePermissionAccess() {
+        var access = javaIOFilePermissionAccess;
+        if (access == null) {
+            ensureClassInitialized(FilePermission.class);
+            access = javaIOFilePermissionAccess;
+        }
+        return access;
+    }
+
+    public static void setJavaIOFilePermissionAccess(JavaIOFilePermissionAccess jiofpa) {
+        javaIOFilePermissionAccess = jiofpa;
+    }
+
+    public static JavaIOFileDescriptorAccess getJavaIOFileDescriptorAccess() {
+        var access = javaIOFileDescriptorAccess;
+        if (access == null) {
+            ensureClassInitialized(FileDescriptor.class);
+            access = javaIOFileDescriptorAccess;
+        }
+        return access;
+    }
+
+    public static void setJavaSecurityAccess(JavaSecurityAccess jsa) {
+        javaSecurityAccess = jsa;
+    }
+
+    public static JavaSecurityAccess getJavaSecurityAccess() {
+        var access = javaSecurityAccess;
+        if (access == null) {
+            ensureClassInitialized(ProtectionDomain.class);
+            access = javaSecurityAccess;
+        }
+        return access;
+    }
+
+    public static void setJavaSecurityPropertiesAccess(JavaSecurityPropertiesAccess jspa) {
+        javaSecurityPropertiesAccess = jspa;
+    }
+
+    public static JavaSecurityPropertiesAccess getJavaSecurityPropertiesAccess() {
+        var access = javaSecurityPropertiesAccess;
+        if (access == null) {
+            ensureClassInitialized(Security.class);
+            access = javaSecurityPropertiesAccess;
+        }
+        return access;
+    }
+
+    public static JavaUtilZipFileAccess getJavaUtilZipFileAccess() {
+        var access = javaUtilZipFileAccess;
+        if (access == null) {
+            ensureClassInitialized(java.util.zip.ZipFile.class);
+            access = javaUtilZipFileAccess;
+        }
+        return access;
+    }
+
+    public static void setJavaUtilZipFileAccess(JavaUtilZipFileAccess access) {
+        javaUtilZipFileAccess = access;
+    }
+
+    public static void setJavaAWTAccess(JavaAWTAccess jaa) {
+        javaAWTAccess = jaa;
+    }
+
+    public static JavaAWTAccess getJavaAWTAccess() {
+        // this may return null in which case calling code needs to
+        // provision for.
+        return javaAWTAccess;
+    }
+
+    public static void setJavaAWTFontAccess(JavaAWTFontAccess jafa) {
+        javaAWTFontAccess = jafa;
+    }
+
+    public static JavaAWTFontAccess getJavaAWTFontAccess() {
+        // this may return null in which case calling code needs to
+        // provision for.
+        return javaAWTFontAccess;
+    }
+
+    public static JavaBeansAccess getJavaBeansAccess() {
+        return javaBeansAccess;
+    }
+
+    public static void setJavaBeansAccess(JavaBeansAccess access) {
+        javaBeansAccess = access;
+    }
+
+    public static JavaUtilResourceBundleAccess getJavaUtilResourceBundleAccess() {
+        var access = javaUtilResourceBundleAccess;
+        if (access == null) {
+            ensureClassInitialized(ResourceBundle.class);
+            access = javaUtilResourceBundleAccess;
+        }
+        return access;
+    }
+
+    public static void setJavaUtilResourceBundleAccess(JavaUtilResourceBundleAccess access) {
+        javaUtilResourceBundleAccess = access;
+    }
+
+    public static JavaObjectInputStreamReadString getJavaObjectInputStreamReadString() {
+        var access = javaObjectInputStreamReadString;
+        if (access == null) {
+            ensureClassInitialized(ObjectInputStream.class);
+            access = javaObjectInputStreamReadString;
+        }
+        return access;
+    }
+
+    public static void setJavaObjectInputStreamReadString(JavaObjectInputStreamReadString access) {
+        javaObjectInputStreamReadString = access;
+    }
+
+    public static JavaObjectInputStreamAccess getJavaObjectInputStreamAccess() {
+        var access = javaObjectInputStreamAccess;
+        if (access == null) {
+            ensureClassInitialized(ObjectInputStream.class);
+            access = javaObjectInputStreamAccess;
+        }
+        return access;
+    }
+
+    public static void setJavaObjectInputStreamAccess(JavaObjectInputStreamAccess access) {
+        javaObjectInputStreamAccess = access;
+    }
+
+    public static JavaObjectInputFilterAccess getJavaObjectInputFilterAccess() {
+        var access = javaObjectInputFilterAccess;
+        if (access == null) {
+            ensureClassInitialized(ObjectInputFilter.Config.class);
+            access = javaObjectInputFilterAccess;
+        }
+        return access;
+    }
+
+    public static void setJavaObjectInputFilterAccess(JavaObjectInputFilterAccess access) {
+        javaObjectInputFilterAccess = access;
+    }
+
+    public static void setJavaIORandomAccessFileAccess(JavaIORandomAccessFileAccess jirafa) {
+        javaIORandomAccessFileAccess = jirafa;
+    }
+
+    public static JavaIORandomAccessFileAccess getJavaIORandomAccessFileAccess() {
+        var access = javaIORandomAccessFileAccess;
+        if (access == null) {
+            ensureClassInitialized(RandomAccessFile.class);
+            access = javaIORandomAccessFileAccess;
+        }
+        return access;
+    }
+
+    public static void setJavaSecuritySignatureAccess(JavaSecuritySignatureAccess jssa) {
+        javaSecuritySignatureAccess = jssa;
+    }
+
+    public static JavaSecuritySignatureAccess getJavaSecuritySignatureAccess() {
+        var access = javaSecuritySignatureAccess;
+        if (access == null) {
+            ensureClassInitialized(Signature.class);
+            access = javaSecuritySignatureAccess;
+        }
+        return access;
+    }
+
+    public static void setJavaSecuritySpecAccess(JavaSecuritySpecAccess jssa) {
+        javaSecuritySpecAccess = jssa;
+    }
+
+    public static JavaSecuritySpecAccess getJavaSecuritySpecAccess() {
+        var access = javaSecuritySpecAccess;
+        if (access == null) {
+            ensureClassInitialized(EncodedKeySpec.class);
+            access = javaSecuritySpecAccess;
+        }
+        return access;
+    }
+
+    public static void setJavaxCryptoSpecAccess(JavaxCryptoSpecAccess jcsa) {
+        javaxCryptoSpecAccess = jcsa;
+    }
+
+    public static JavaxCryptoSpecAccess getJavaxCryptoSpecAccess() {
+        var access = javaxCryptoSpecAccess;
+        if (access == null) {
+            ensureClassInitialized(SecretKeySpec.class);
+            access = javaxCryptoSpecAccess;
+        }
+        return access;
+    }
+
+    public static void setJavaxCryptoSealedObjectAccess(JavaxCryptoSealedObjectAccess jcsoa) {
+        javaxCryptoSealedObjectAccess = jcsoa;
+    }
+
+    public static JavaxCryptoSealedObjectAccess getJavaxCryptoSealedObjectAccess() {
+        var access = javaxCryptoSealedObjectAccess;
+        if (access == null) {
+            ensureClassInitialized(SealedObject.class);
+            access = javaxCryptoSealedObjectAccess;
+        }
+        return access;
+    }
+
+    public static void setJavaxSecurityAccess(JavaxSecurityAccess jsa) {
+        javaxSecurityAccess = jsa;
+    }
+
+    public static JavaxSecurityAccess getJavaxSecurityAccess() {
+        var access = javaxSecurityAccess;
+        if (access == null) {
+            ensureClassInitialized(X500Principal.class);
+            access = javaxSecurityAccess;
+        }
+        return access;
+    }
+
+    private static void ensureClassInitialized(Class<?> c) {
+        try {
+            MethodHandles.lookup().ensureInitialized(c);
+        } catch (IllegalAccessException e) {}
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/access/foreign/UnmapperProxy.class b/tests/test_data/std/jdk/internal/access/foreign/UnmapperProxy.class
new file mode 100644
index 0000000000000000000000000000000000000000..1235d5a9092850b200ce1541abad4c758d018d61
GIT binary patch
literal 258
zcmY+9IS#@w5Jms6B<vtcPCy!b07?)ALIMdvL1!F;9D*G=0m0QMH~@!2IPPd>(fl{_
z=ktBN0nE@3Q6WT0d|^r#(rTVEE`-c;b~09~vt~Pe<yj`}#+t`7M2#>=_?@$q>oZ#)
z6DbNp$m7^LiclR#OG59YQaP8ouqrEzC5*<=%45o~#oug72voj(YT@Anp?)h*`fg8X
tZOzRJSwe*2pPNa!F(5dp`v#~vb9Dr+aE{RMxrvs~ZFHQ1&~>qb-ValpK8FAR

literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/access/foreign/UnmapperProxy.java b/tests/test_data/std/jdk/internal/access/foreign/UnmapperProxy.java
new file mode 100644
index 00000000..23781301
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/access/foreign/UnmapperProxy.java
@@ -0,0 +1,40 @@
+/*
+ *  Copyright (c) 2019, Oracle and/or its affiliates. All rights reserved.
+ *  DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ *  This code is free software; you can redistribute it and/or modify it
+ *  under the terms of the GNU General Public License version 2 only, as
+ *  published by the Free Software Foundation.  Oracle designates this
+ *  particular file as subject to the "Classpath" exception as provided
+ *  by Oracle in the LICENSE file that accompanied this code.
+ *
+ *  This code is distributed in the hope that it will be useful, but WITHOUT
+ *  ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ *  FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ *  version 2 for more details (a copy is included in the LICENSE file that
+ *  accompanied this code).
+ *
+ *  You should have received a copy of the GNU General Public License version
+ *  2 along with this work; if not, write to the Free Software Foundation,
+ *  Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ *   Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ *  or visit www.oracle.com if you need additional information or have any
+ *  questions.
+ *
+ */
+
+package jdk.internal.access.foreign;
+
+import java.io.FileDescriptor;
+
+/**
+ * This proxy interface is required to allow instances of the {@code FileChannelImpl.Unmapper} interface (which is a non-public class
+ * inside the {@code sun.nio.ch} package) to be accessed from the mapped memory segment factory.
+ */
+public interface UnmapperProxy {
+    long address();
+    FileDescriptor fileDescriptor();
+    boolean isSync();
+    void unmap();
+}
diff --git a/tests/test_data/std/jdk/internal/classfile/impl/AbstractAttributeMapper$AnnotationDefaultMapper.class b/tests/test_data/std/jdk/internal/classfile/impl/AbstractAttributeMapper$AnnotationDefaultMapper.class
new file mode 100644
index 0000000000000000000000000000000000000000..cfd4b86d33ffebb9a63dc89116ab0107af7efd00
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diff --git a/tests/test_data/std/jdk/internal/classfile/impl/AbstractAttributeMapper$BootstrapMethodsMapper.class b/tests/test_data/std/jdk/internal/classfile/impl/AbstractAttributeMapper$BootstrapMethodsMapper.class
new file mode 100644
index 0000000000000000000000000000000000000000..760cefc7e8df290976f415824fa72c29cbe070f2
GIT binary patch
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diff --git a/tests/test_data/std/jdk/internal/classfile/impl/AbstractAttributeMapper$CodeMapper.class b/tests/test_data/std/jdk/internal/classfile/impl/AbstractAttributeMapper$CodeMapper.class
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diff --git a/tests/test_data/std/jdk/internal/classfile/impl/AbstractAttributeMapper$CompilationIDMapper.class b/tests/test_data/std/jdk/internal/classfile/impl/AbstractAttributeMapper$CompilationIDMapper.class
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diff --git a/tests/test_data/std/jdk/internal/classfile/impl/AbstractAttributeMapper$ConstantValueMapper.class b/tests/test_data/std/jdk/internal/classfile/impl/AbstractAttributeMapper$ConstantValueMapper.class
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diff --git a/tests/test_data/std/jdk/internal/classfile/impl/AbstractAttributeMapper$InnerClassesMapper.class b/tests/test_data/std/jdk/internal/classfile/impl/AbstractAttributeMapper$InnerClassesMapper.class
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index 0000000000000000000000000000000000000000..451fe0c82e11a4113ba760043ed753fe9087bc7a
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diff --git a/tests/test_data/std/jdk/internal/classfile/impl/AbstractAttributeMapper$ModuleMapper.class b/tests/test_data/std/jdk/internal/classfile/impl/AbstractAttributeMapper$ModuleMapper.class
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diff --git a/tests/test_data/std/jdk/internal/classfile/impl/AbstractAttributeMapper$ModulePackagesMapper.class b/tests/test_data/std/jdk/internal/classfile/impl/AbstractAttributeMapper$ModulePackagesMapper.class
new file mode 100644
index 0000000000000000000000000000000000000000..7e1b40ed935690e131efc224aed63ea36ab49d6c
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diff --git a/tests/test_data/std/jdk/internal/classfile/impl/AbstractAttributeMapper$ModuleResolutionMapper.class b/tests/test_data/std/jdk/internal/classfile/impl/AbstractAttributeMapper$ModuleResolutionMapper.class
new file mode 100644
index 0000000000000000000000000000000000000000..2df8afa91d76d874d30513cccf818ad20f6b8957
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diff --git a/tests/test_data/std/jdk/internal/classfile/impl/AbstractAttributeMapper$ModuleTargetMapper.class b/tests/test_data/std/jdk/internal/classfile/impl/AbstractAttributeMapper$ModuleTargetMapper.class
new file mode 100644
index 0000000000000000000000000000000000000000..1a904ff43458acb27068b5bad64c855280328b90
GIT binary patch
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diff --git a/tests/test_data/std/jdk/internal/classfile/impl/AbstractAttributeMapper$NestHostMapper.class b/tests/test_data/std/jdk/internal/classfile/impl/AbstractAttributeMapper$NestHostMapper.class
new file mode 100644
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diff --git a/tests/test_data/std/jdk/internal/classfile/impl/AbstractAttributeMapper$NestMembersMapper.class b/tests/test_data/std/jdk/internal/classfile/impl/AbstractAttributeMapper$NestMembersMapper.class
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index 0000000000000000000000000000000000000000..207421e17b41ec4b65ad05abb74178bf25942e7f
GIT binary patch
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diff --git a/tests/test_data/std/jdk/internal/classfile/impl/AbstractAttributeMapper$PermittedSubclassesMapper.class b/tests/test_data/std/jdk/internal/classfile/impl/AbstractAttributeMapper$PermittedSubclassesMapper.class
new file mode 100644
index 0000000000000000000000000000000000000000..50e4d92a0d0730a25c559279ec9bd7603696fcb8
GIT binary patch
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diff --git a/tests/test_data/std/jdk/internal/classfile/impl/AbstractAttributeMapper$RuntimeInvisibleTypeAnnotationsMapper.class b/tests/test_data/std/jdk/internal/classfile/impl/AbstractAttributeMapper$RuntimeInvisibleTypeAnnotationsMapper.class
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diff --git a/tests/test_data/std/jdk/internal/classfile/impl/AbstractAttributeMapper$SyntheticMapper.class b/tests/test_data/std/jdk/internal/classfile/impl/AbstractAttributeMapper$SyntheticMapper.class
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HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/classfile/impl/AbstractAttributeMapper.java b/tests/test_data/std/jdk/internal/classfile/impl/AbstractAttributeMapper.java
new file mode 100644
index 00000000..9bb3f275
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/classfile/impl/AbstractAttributeMapper.java
@@ -0,0 +1,824 @@
+/*
+ * Copyright (c) 2022, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package jdk.internal.classfile.impl;
+
+import java.lang.classfile.Annotation;
+import java.lang.classfile.Attribute;
+import java.lang.classfile.AttributeMapper;
+import java.lang.classfile.AttributedElement;
+import java.lang.classfile.BufWriter;
+import java.lang.classfile.ClassReader;
+import java.lang.classfile.attribute.*;
+import java.util.List;
+
+import static java.lang.classfile.Attributes.*;
+
+public sealed abstract class AbstractAttributeMapper<T extends Attribute<T>>
+        implements AttributeMapper<T> {
+
+    private final String name;
+    private final AttributeMapper.AttributeStability stability;
+    private final boolean allowMultiple;
+
+    protected abstract void writeBody(BufWriter buf, T attr);
+
+    public AbstractAttributeMapper(String name, AttributeMapper.AttributeStability stability) {
+        this(name, stability, false);
+    }
+
+    public AbstractAttributeMapper(String name,
+                                   AttributeMapper.AttributeStability stability,
+                                   boolean allowMultiple) {
+        this.name = name;
+        this.stability = stability;
+        this.allowMultiple = allowMultiple;
+    }
+
+    @Override
+    public final String name() {
+        return name;
+    }
+
+    @Override
+    public final void writeAttribute(BufWriter buf, T attr) {
+        buf.writeIndex(buf.constantPool().utf8Entry(name));
+        buf.writeInt(0);
+        int start = buf.size();
+        writeBody(buf, attr);
+        int written = buf.size() - start;
+        buf.patchInt(start - 4, 4, written);
+    }
+
+    @Override
+    public AttributeMapper.AttributeStability stability() {
+        return stability;
+    }
+
+    @Override
+    public boolean allowMultiple() {
+        return allowMultiple;
+    }
+
+    @Override
+    public String toString() {
+        return String.format("AttributeMapper[name=%s, allowMultiple=%b, stability=%s]",
+                name, allowMultiple, stability());
+    }
+
+    public static final class AnnotationDefaultMapper extends AbstractAttributeMapper<AnnotationDefaultAttribute> {
+        public static final AnnotationDefaultMapper INSTANCE = new AnnotationDefaultMapper();
+
+        private AnnotationDefaultMapper() {
+            super(NAME_ANNOTATION_DEFAULT, AttributeStability.CP_REFS);
+        }
+
+        @Override
+        public AnnotationDefaultAttribute readAttribute(AttributedElement e, ClassReader cf, int p) {
+            return new BoundAttribute.BoundAnnotationDefaultAttr(cf, this, p);
+        }
+
+        @Override
+        protected void writeBody(BufWriter buf, AnnotationDefaultAttribute attr) {
+            attr.defaultValue().writeTo(buf);
+        }
+    }
+
+    public static final class BootstrapMethodsMapper extends AbstractAttributeMapper<BootstrapMethodsAttribute> {
+        public static final BootstrapMethodsMapper INSTANCE = new BootstrapMethodsMapper();
+
+        private BootstrapMethodsMapper() {
+            super(NAME_BOOTSTRAP_METHODS, AttributeStability.CP_REFS);
+        }
+
+        @Override
+        public BootstrapMethodsAttribute readAttribute(AttributedElement e, ClassReader cf, int p) {
+            return new BoundAttribute.BoundBootstrapMethodsAttribute(cf, this, p);
+        }
+
+        @Override
+        protected void writeBody(BufWriter buf, BootstrapMethodsAttribute attr) {
+            buf.writeList(attr.bootstrapMethods());
+        }
+    }
+
+    public static final class CharacterRangeTableMapper extends AbstractAttributeMapper<CharacterRangeTableAttribute> {
+        public static final CharacterRangeTableMapper INSTANCE = new CharacterRangeTableMapper();
+
+        private CharacterRangeTableMapper() {
+            super(NAME_CHARACTER_RANGE_TABLE, AttributeStability.LABELS, true);
+        }
+
+        @Override
+        public CharacterRangeTableAttribute readAttribute(AttributedElement e, ClassReader cf, int p) {
+            return new BoundAttribute.BoundCharacterRangeTableAttribute(cf, this, p);
+        }
+
+        @Override
+        protected void writeBody(BufWriter buf, CharacterRangeTableAttribute attr) {
+            List<CharacterRangeInfo> ranges = attr.characterRangeTable();
+            buf.writeU2(ranges.size());
+            for (CharacterRangeInfo info : ranges) {
+                buf.writeU2(info.startPc());
+                buf.writeU2(info.endPc());
+                buf.writeInt(info.characterRangeStart());
+                buf.writeInt(info.characterRangeEnd());
+                buf.writeU2(info.flags());
+            }
+        }
+    }
+
+    public static final class CodeMapper extends AbstractAttributeMapper<CodeAttribute> {
+        public static final CodeMapper INSTANCE = new CodeMapper();
+
+        private CodeMapper() {
+            super(NAME_CODE, AttributeStability.CP_REFS);
+        }
+
+        @Override
+        public CodeAttribute readAttribute(AttributedElement e, ClassReader cf, int p) {
+            return new CodeImpl(e, cf, this, p);
+        }
+
+        @Override
+        protected void writeBody(BufWriter buf, CodeAttribute attr) {
+            throw new UnsupportedOperationException("Code attribute does not support direct write");
+        }
+    }
+
+    public static final class CompilationIDMapper extends AbstractAttributeMapper<CompilationIDAttribute> {
+        public static final CompilationIDMapper INSTANCE = new CompilationIDMapper();
+
+        private CompilationIDMapper() {
+            super(NAME_COMPILATION_ID, AttributeStability.CP_REFS);
+        }
+
+        @Override
+        public CompilationIDAttribute readAttribute(AttributedElement e, ClassReader cf, int p) {
+            return new BoundAttribute.BoundCompilationIDAttribute(cf, this, p);
+        }
+
+        @Override
+        protected void writeBody(BufWriter buf, CompilationIDAttribute attr) {
+            buf.writeIndex(attr.compilationId());
+        }
+    }
+
+    public static final class ConstantValueMapper extends AbstractAttributeMapper<ConstantValueAttribute> {
+        public static final ConstantValueMapper INSTANCE = new ConstantValueMapper();
+
+        private ConstantValueMapper() {
+            super(NAME_CONSTANT_VALUE, AttributeStability.CP_REFS);
+        }
+
+        @Override
+        public ConstantValueAttribute readAttribute(AttributedElement e, ClassReader cf, int p) {
+            return new BoundAttribute.BoundConstantValueAttribute(cf, this, p);
+        }
+
+        @Override
+        protected void writeBody(BufWriter buf, ConstantValueAttribute attr) {
+            buf.writeIndex(attr.constant());
+        }
+    }
+
+    public static final class DeprecatedMapper extends AbstractAttributeMapper<DeprecatedAttribute> {
+        public static final DeprecatedMapper INSTANCE = new DeprecatedMapper();
+
+        private DeprecatedMapper() {
+            super(NAME_DEPRECATED, AttributeStability.STATELESS, true);
+        }
+
+        @Override
+        public DeprecatedAttribute readAttribute(AttributedElement e, ClassReader cf, int p) {
+            return new BoundAttribute.BoundDeprecatedAttribute(cf, this, p);
+        }
+
+        @Override
+        protected void writeBody(BufWriter buf, DeprecatedAttribute attr) {
+            // empty
+        }
+    }
+
+    public static final class EnclosingMethodMapper extends AbstractAttributeMapper<EnclosingMethodAttribute> {
+        public static final EnclosingMethodMapper INSTANCE = new EnclosingMethodMapper();
+
+        private EnclosingMethodMapper() {
+            super(NAME_ENCLOSING_METHOD, AttributeStability.CP_REFS);
+        }
+
+        @Override
+        public EnclosingMethodAttribute readAttribute(AttributedElement e, ClassReader cf, int p) {
+            return new BoundAttribute.BoundEnclosingMethodAttribute(cf, this, p);
+        }
+
+        @Override
+        protected void writeBody(BufWriter buf, EnclosingMethodAttribute attr) {
+            buf.writeIndex(attr.enclosingClass());
+            buf.writeIndexOrZero(attr.enclosingMethod().orElse(null));
+        }
+    }
+
+    public static final class ExceptionsMapper extends AbstractAttributeMapper<ExceptionsAttribute> {
+        public static final ExceptionsMapper INSTANCE = new ExceptionsMapper();
+
+        private ExceptionsMapper() {
+            super(NAME_EXCEPTIONS, AttributeStability.CP_REFS);
+        }
+
+        @Override
+        public ExceptionsAttribute readAttribute(AttributedElement e, ClassReader cf, int p) {
+            return new BoundAttribute.BoundExceptionsAttribute(cf, this, p);
+        }
+
+        @Override
+        protected void writeBody(BufWriter buf, ExceptionsAttribute attr) {
+            buf.writeListIndices(attr.exceptions());
+        }
+    }
+
+    public static final class InnerClassesMapper extends AbstractAttributeMapper<InnerClassesAttribute> {
+        public static final InnerClassesMapper INSTANCE = new InnerClassesMapper();
+
+        private InnerClassesMapper() {
+            super(NAME_INNER_CLASSES, AttributeStability.CP_REFS);
+        }
+
+        @Override
+        public InnerClassesAttribute readAttribute(AttributedElement e, ClassReader cf, int p) {
+            return new BoundAttribute.BoundInnerClassesAttribute(cf, this, p);
+        }
+
+        @Override
+        protected void writeBody(BufWriter buf, InnerClassesAttribute attr) {
+            List<InnerClassInfo> classes = attr.classes();
+            buf.writeU2(classes.size());
+            for (InnerClassInfo ic : classes) {
+                buf.writeIndex(ic.innerClass());
+                buf.writeIndexOrZero(ic.outerClass().orElse(null));
+                buf.writeIndexOrZero(ic.innerName().orElse(null));
+                buf.writeU2(ic.flagsMask());
+            }
+        }
+    }
+
+    public static final class LineNumberTableMapper extends AbstractAttributeMapper<LineNumberTableAttribute> {
+        public static final LineNumberTableMapper INSTANCE = new LineNumberTableMapper();
+
+        private LineNumberTableMapper() {
+            super(NAME_LINE_NUMBER_TABLE, AttributeStability.LABELS, true);
+        }
+
+        @Override
+        public LineNumberTableAttribute readAttribute(AttributedElement e, ClassReader cf, int p) {
+            return new BoundAttribute.BoundLineNumberTableAttribute(cf, this, p);
+        }
+
+        @Override
+        protected void writeBody(BufWriter buf, LineNumberTableAttribute attr) {
+            List<LineNumberInfo> lines = attr.lineNumbers();
+            buf.writeU2(lines.size());
+            for (LineNumberInfo line : lines) {
+                buf.writeU2(line.startPc());
+                buf.writeU2(line.lineNumber());
+            }
+        }
+    }
+
+    public static final class LocalVariableTableMapper extends AbstractAttributeMapper<LocalVariableTableAttribute> {
+        public static final LocalVariableTableMapper INSTANCE = new LocalVariableTableMapper();
+
+        private LocalVariableTableMapper() {
+            super(NAME_LOCAL_VARIABLE_TABLE, AttributeStability.LABELS, true);
+        }
+
+        @Override
+        public LocalVariableTableAttribute readAttribute(AttributedElement e, ClassReader cf, int p) {
+            return new BoundAttribute.BoundLocalVariableTableAttribute(e, cf, this, p);
+        }
+
+        @Override
+        protected void writeBody(BufWriter buf, LocalVariableTableAttribute attr) {
+            List<LocalVariableInfo> infos = attr.localVariables();
+            buf.writeU2(infos.size());
+            for (LocalVariableInfo info : infos) {
+                buf.writeU2(info.startPc());
+                buf.writeU2(info.length());
+                buf.writeIndex(info.name());
+                buf.writeIndex(info.type());
+                buf.writeU2(info.slot());
+            }
+        }
+    }
+
+    public static final class LocalVariableTypeTableMapper extends AbstractAttributeMapper<LocalVariableTypeTableAttribute> {
+        public static final LocalVariableTypeTableMapper INSTANCE = new LocalVariableTypeTableMapper();
+
+        private LocalVariableTypeTableMapper() {
+            super(NAME_LOCAL_VARIABLE_TYPE_TABLE, AttributeStability.LABELS, true);
+        }
+
+        @Override
+        public LocalVariableTypeTableAttribute readAttribute(AttributedElement e, ClassReader cf, int p) {
+            return new BoundAttribute.BoundLocalVariableTypeTableAttribute(e, cf, this, p);
+        }
+
+        @Override
+        protected void writeBody(BufWriter buf, LocalVariableTypeTableAttribute attr) {
+            List<LocalVariableTypeInfo> infos = attr.localVariableTypes();
+            buf.writeU2(infos.size());
+            for (LocalVariableTypeInfo info : infos) {
+                buf.writeU2(info.startPc());
+                buf.writeU2(info.length());
+                buf.writeIndex(info.name());
+                buf.writeIndex(info.signature());
+                buf.writeU2(info.slot());
+            }
+        }
+    }
+
+    public static final class MethodParametersMapper extends AbstractAttributeMapper<MethodParametersAttribute> {
+        public static final MethodParametersMapper INSTANCE = new MethodParametersMapper();
+
+        private MethodParametersMapper() {
+            super(NAME_METHOD_PARAMETERS, AttributeStability.CP_REFS);
+        }
+
+        @Override
+        public MethodParametersAttribute readAttribute(AttributedElement e, ClassReader cf, int p) {
+            return new BoundAttribute.BoundMethodParametersAttribute(cf, this, p);
+        }
+
+        @Override
+        protected void writeBody(BufWriter buf, MethodParametersAttribute attr) {
+            List<MethodParameterInfo> parameters = attr.parameters();
+            buf.writeU1(parameters.size());
+            for (MethodParameterInfo info : parameters) {
+                buf.writeIndexOrZero(info.name().orElse(null));
+                buf.writeU2(info.flagsMask());
+            }
+        }
+    }
+
+    public static final class ModuleMapper extends AbstractAttributeMapper<ModuleAttribute> {
+        public static final ModuleMapper INSTANCE = new ModuleMapper();
+
+        private ModuleMapper() {
+            super(NAME_MODULE, AttributeStability.CP_REFS);
+        }
+
+        @Override
+        public ModuleAttribute readAttribute(AttributedElement e, ClassReader cf, int p) {
+            return new BoundAttribute.BoundModuleAttribute(cf, this, p);
+        }
+
+        @Override
+        protected void writeBody(BufWriter buf, ModuleAttribute attr) {
+            buf.writeIndex(attr.moduleName());
+            buf.writeU2(attr.moduleFlagsMask());
+            buf.writeIndexOrZero(attr.moduleVersion().orElse(null));
+            buf.writeU2(attr.requires().size());
+            for (ModuleRequireInfo require : attr.requires()) {
+                buf.writeIndex(require.requires());
+                buf.writeU2(require.requiresFlagsMask());
+                buf.writeIndexOrZero(require.requiresVersion().orElse(null));
+            }
+            buf.writeU2(attr.exports().size());
+            for (ModuleExportInfo export : attr.exports()) {
+                buf.writeIndex(export.exportedPackage());
+                buf.writeU2(export.exportsFlagsMask());
+                buf.writeListIndices(export.exportsTo());
+            }
+            buf.writeU2(attr.opens().size());
+            for (ModuleOpenInfo open : attr.opens()) {
+                buf.writeIndex(open.openedPackage());
+                buf.writeU2(open.opensFlagsMask());
+                buf.writeListIndices(open.opensTo());
+            }
+            buf.writeListIndices(attr.uses());
+            buf.writeU2(attr.provides().size());
+            for (ModuleProvideInfo provide : attr.provides()) {
+                buf.writeIndex(provide.provides());
+                buf.writeListIndices(provide.providesWith());
+            }
+        }
+    }
+
+    public static final class ModuleHashesMapper extends AbstractAttributeMapper<ModuleHashesAttribute> {
+        public static final ModuleHashesMapper INSTANCE = new ModuleHashesMapper();
+
+        private ModuleHashesMapper() {
+            super(NAME_MODULE_HASHES, AttributeStability.CP_REFS);
+        }
+
+        @Override
+        public ModuleHashesAttribute readAttribute(AttributedElement e, ClassReader cf, int p) {
+            return new BoundAttribute.BoundModuleHashesAttribute(cf, this, p);
+        }
+
+        @Override
+        protected void writeBody(BufWriter buf, ModuleHashesAttribute attr) {
+            buf.writeIndex(attr.algorithm());
+            List<ModuleHashInfo> hashes = attr.hashes();
+            buf.writeU2(hashes.size());
+            for (ModuleHashInfo hash : hashes) {
+                buf.writeIndex(hash.moduleName());
+                buf.writeU2(hash.hash().length);
+                buf.writeBytes(hash.hash());
+            }
+        }
+    }
+
+    public static final class ModuleMainClassMapper extends AbstractAttributeMapper<ModuleMainClassAttribute> {
+        public static final ModuleMainClassMapper INSTANCE = new ModuleMainClassMapper();
+
+        private ModuleMainClassMapper() {
+            super(NAME_MODULE_MAIN_CLASS, AttributeStability.CP_REFS);
+        }
+
+        @Override
+        public ModuleMainClassAttribute readAttribute(AttributedElement e, ClassReader cf, int p) {
+            return new BoundAttribute.BoundModuleMainClassAttribute(cf, this, p);
+        }
+
+        @Override
+        protected void writeBody(BufWriter buf, ModuleMainClassAttribute attr) {
+            buf.writeIndex(attr.mainClass());
+        }
+    }
+
+    public static final class ModulePackagesMapper extends AbstractAttributeMapper<ModulePackagesAttribute> {
+        public static final ModulePackagesMapper INSTANCE = new ModulePackagesMapper();
+
+        private ModulePackagesMapper() {
+            super(NAME_MODULE_PACKAGES, AttributeStability.CP_REFS);
+        }
+
+        @Override
+        public ModulePackagesAttribute readAttribute(AttributedElement e, ClassReader cf, int p) {
+            return new BoundAttribute.BoundModulePackagesAttribute(cf, this, p);
+        }
+
+        @Override
+        protected void writeBody(BufWriter buf, ModulePackagesAttribute attr) {
+            buf.writeListIndices(attr.packages());
+        }
+    }
+
+    public static final class ModuleResolutionMapper extends AbstractAttributeMapper<ModuleResolutionAttribute> {
+        public static final ModuleResolutionMapper INSTANCE = new ModuleResolutionMapper();
+
+        private ModuleResolutionMapper() {
+            super(NAME_MODULE_RESOLUTION, AttributeStability.STATELESS);
+        }
+
+        @Override
+        public ModuleResolutionAttribute readAttribute(AttributedElement e, ClassReader cf, int p) {
+            return new BoundAttribute.BoundModuleResolutionAttribute(cf, this, p);
+        }
+
+        @Override
+        protected void writeBody(BufWriter buf, ModuleResolutionAttribute attr) {
+            buf.writeU2(attr.resolutionFlags());
+        }
+    }
+
+    public static final class ModuleTargetMapper extends AbstractAttributeMapper<ModuleTargetAttribute> {
+        public static final ModuleTargetMapper INSTANCE = new ModuleTargetMapper();
+
+        private ModuleTargetMapper() {
+            super(NAME_MODULE_TARGET, AttributeStability.CP_REFS);
+        }
+
+        @Override
+        public ModuleTargetAttribute readAttribute(AttributedElement e, ClassReader cf, int p) {
+            return new BoundAttribute.BoundModuleTargetAttribute(cf, this, p);
+        }
+
+        @Override
+        protected void writeBody(BufWriter buf, ModuleTargetAttribute attr) {
+            buf.writeIndex(attr.targetPlatform());
+        }
+    }
+
+    public static final class NestHostMapper extends AbstractAttributeMapper<NestHostAttribute> {
+        public static final NestHostMapper INSTANCE = new NestHostMapper();
+
+        private NestHostMapper() {
+            super(NAME_NEST_HOST, AttributeStability.CP_REFS);
+        }
+
+        @Override
+        public NestHostAttribute readAttribute(AttributedElement e, ClassReader cf, int p) {
+            return new BoundAttribute.BoundNestHostAttribute(cf, this, p);
+        }
+
+        @Override
+        protected void writeBody(BufWriter buf, NestHostAttribute attr) {
+            buf.writeIndex(attr.nestHost());
+        }
+    }
+
+    public static final class NestMembersMapper extends AbstractAttributeMapper<NestMembersAttribute> {
+        public static final NestMembersMapper INSTANCE = new NestMembersMapper();
+
+        private NestMembersMapper() {
+            super(NAME_NEST_MEMBERS, AttributeStability.CP_REFS);
+        }
+
+        @Override
+        public NestMembersAttribute readAttribute(AttributedElement e, ClassReader cf, int p) {
+            return new BoundAttribute.BoundNestMembersAttribute(cf, this, p);
+        }
+
+        @Override
+        protected void writeBody(BufWriter buf, NestMembersAttribute attr) {
+            buf.writeListIndices(attr.nestMembers());
+        }
+    }
+
+    public static final class PermittedSubclassesMapper extends AbstractAttributeMapper<PermittedSubclassesAttribute> {
+        public static final PermittedSubclassesMapper INSTANCE = new PermittedSubclassesMapper();
+
+        private PermittedSubclassesMapper() {
+            super(NAME_PERMITTED_SUBCLASSES, AttributeStability.CP_REFS);
+        }
+
+        @Override
+        public PermittedSubclassesAttribute readAttribute(AttributedElement e, ClassReader cf, int p) {
+            return new BoundAttribute.BoundPermittedSubclassesAttribute(cf, this, p);
+        }
+
+        @Override
+        protected void writeBody(BufWriter buf, PermittedSubclassesAttribute attr) {
+            buf.writeListIndices(attr.permittedSubclasses());
+        }
+    }
+
+    public static final class RecordMapper extends AbstractAttributeMapper<RecordAttribute> {
+        public static final RecordMapper INSTANCE = new RecordMapper();
+
+        private RecordMapper() {
+            super(NAME_RECORD, AttributeStability.CP_REFS);
+        }
+
+        @Override
+        public RecordAttribute readAttribute(AttributedElement e, ClassReader cf, int p) {
+            return new BoundAttribute.BoundRecordAttribute(cf, this, p);
+        }
+
+        @Override
+        protected void writeBody(BufWriter buf, RecordAttribute attr) {
+            List<RecordComponentInfo> components = attr.components();
+            buf.writeU2(components.size());
+            for (RecordComponentInfo info : components) {
+                buf.writeIndex(info.name());
+                buf.writeIndex(info.descriptor());
+                buf.writeList(info.attributes());
+            }
+        }
+    }
+
+    public static final class RuntimeInvisibleAnnotationsMapper extends AbstractAttributeMapper<RuntimeInvisibleAnnotationsAttribute> {
+        public static final RuntimeInvisibleAnnotationsMapper INSTANCE = new RuntimeInvisibleAnnotationsMapper();
+
+        private RuntimeInvisibleAnnotationsMapper() {
+            super(NAME_RUNTIME_INVISIBLE_ANNOTATIONS, AttributeStability.CP_REFS);
+        }
+
+        @Override
+        public RuntimeInvisibleAnnotationsAttribute readAttribute(AttributedElement enclosing, ClassReader cf, int pos) {
+            return new BoundAttribute.BoundRuntimeInvisibleAnnotationsAttribute(cf, pos);
+        }
+
+        @Override
+        protected void writeBody(BufWriter buf, RuntimeInvisibleAnnotationsAttribute attr) {
+            buf.writeList(attr.annotations());
+        }
+    }
+
+    public static final class RuntimeInvisibleParameterAnnotationsMapper extends AbstractAttributeMapper<RuntimeInvisibleParameterAnnotationsAttribute> {
+        public static final RuntimeInvisibleParameterAnnotationsMapper INSTANCE = new RuntimeInvisibleParameterAnnotationsMapper();
+
+        private RuntimeInvisibleParameterAnnotationsMapper() {
+            super(NAME_RUNTIME_INVISIBLE_PARAMETER_ANNOTATIONS, AttributeStability.CP_REFS);
+        }
+
+        @Override
+        public RuntimeInvisibleParameterAnnotationsAttribute readAttribute(AttributedElement e, ClassReader cf, int p) {
+            return new BoundAttribute.BoundRuntimeInvisibleParameterAnnotationsAttribute(cf, this, p);
+        }
+
+        @Override
+        protected void writeBody(BufWriter buf, RuntimeInvisibleParameterAnnotationsAttribute attr) {
+            List<List<Annotation>> lists = attr.parameterAnnotations();
+            buf.writeU1(lists.size());
+            for (List<Annotation> list : lists)
+                buf.writeList(list);
+        }
+    }
+
+    public static final class RuntimeInvisibleTypeAnnotationsMapper extends AbstractAttributeMapper<RuntimeInvisibleTypeAnnotationsAttribute> {
+        public static final RuntimeInvisibleTypeAnnotationsMapper INSTANCE = new RuntimeInvisibleTypeAnnotationsMapper();
+
+        private RuntimeInvisibleTypeAnnotationsMapper() {
+            super(NAME_RUNTIME_INVISIBLE_TYPE_ANNOTATIONS, AttributeStability.UNSTABLE);
+        }
+
+        @Override
+        public RuntimeInvisibleTypeAnnotationsAttribute readAttribute(AttributedElement e, ClassReader cf, int p) {
+            return new BoundAttribute.BoundRuntimeInvisibleTypeAnnotationsAttribute(e, cf, this, p);
+        }
+
+        @Override
+        protected void writeBody(BufWriter buf, RuntimeInvisibleTypeAnnotationsAttribute attr) {
+            buf.writeList(attr.annotations());
+        }
+    }
+
+    public static final class RuntimeVisibleAnnotationsMapper extends AbstractAttributeMapper<RuntimeVisibleAnnotationsAttribute> {
+        public static final RuntimeVisibleAnnotationsMapper INSTANCE = new RuntimeVisibleAnnotationsMapper();
+
+        private RuntimeVisibleAnnotationsMapper() {
+            super(NAME_RUNTIME_VISIBLE_ANNOTATIONS, AttributeStability.CP_REFS);
+        }
+
+        @Override
+        public RuntimeVisibleAnnotationsAttribute readAttribute(AttributedElement enclosing, ClassReader cf, int pos) {
+            return new BoundAttribute.BoundRuntimeVisibleAnnotationsAttribute(cf, pos);
+        }
+
+        @Override
+        protected void writeBody(BufWriter buf, RuntimeVisibleAnnotationsAttribute attr) {
+            buf.writeList(attr.annotations());
+        }
+    }
+
+    public static final class RuntimeVisibleParameterAnnotationsMapper extends AbstractAttributeMapper<RuntimeVisibleParameterAnnotationsAttribute> {
+        public static final RuntimeVisibleParameterAnnotationsMapper INSTANCE = new RuntimeVisibleParameterAnnotationsMapper();
+
+        private RuntimeVisibleParameterAnnotationsMapper() {
+            super(NAME_RUNTIME_VISIBLE_PARAMETER_ANNOTATIONS, AttributeStability.CP_REFS);
+        }
+
+        @Override
+        public RuntimeVisibleParameterAnnotationsAttribute readAttribute(AttributedElement e, ClassReader cf, int p) {
+            return new BoundAttribute.BoundRuntimeVisibleParameterAnnotationsAttribute(cf, this, p);
+        }
+
+        @Override
+        protected void writeBody(BufWriter buf, RuntimeVisibleParameterAnnotationsAttribute attr) {
+            List<List<Annotation>> lists = attr.parameterAnnotations();
+            buf.writeU1(lists.size());
+            for (List<Annotation> list : lists)
+                buf.writeList(list);
+        }
+    }
+
+    public static final class RuntimeVisibleTypeAnnotationsMapper extends AbstractAttributeMapper<RuntimeVisibleTypeAnnotationsAttribute> {
+        public static final RuntimeVisibleTypeAnnotationsMapper INSTANCE = new RuntimeVisibleTypeAnnotationsMapper();
+
+        private RuntimeVisibleTypeAnnotationsMapper() {
+            super(NAME_RUNTIME_VISIBLE_TYPE_ANNOTATIONS, AttributeStability.UNSTABLE);
+        }
+
+        @Override
+        public RuntimeVisibleTypeAnnotationsAttribute readAttribute(AttributedElement e, ClassReader cf, int p) {
+            return new BoundAttribute.BoundRuntimeVisibleTypeAnnotationsAttribute(e, cf, this, p);
+        }
+
+        @Override
+        protected void writeBody(BufWriter buf, RuntimeVisibleTypeAnnotationsAttribute attr) {
+            buf.writeList(attr.annotations());
+        }
+    }
+
+    public static final class SignatureMapper extends AbstractAttributeMapper<SignatureAttribute> {
+        public static final SignatureMapper INSTANCE = new SignatureMapper();
+
+        private SignatureMapper() {
+            super(NAME_SIGNATURE, AttributeStability.CP_REFS);
+        }
+
+        @Override
+        public SignatureAttribute readAttribute(AttributedElement e, ClassReader cf, int p) {
+            return new BoundAttribute.BoundSignatureAttribute(cf, this, p);
+        }
+
+        @Override
+        protected void writeBody(BufWriter buf, SignatureAttribute attr) {
+            buf.writeIndex(attr.signature());
+        }
+    }
+
+    public static final class SourceDebugExtensionMapper extends AbstractAttributeMapper<SourceDebugExtensionAttribute> {
+        public static final SourceDebugExtensionMapper INSTANCE = new SourceDebugExtensionMapper();
+
+        private SourceDebugExtensionMapper() {
+            super(NAME_SOURCE_DEBUG_EXTENSION, AttributeStability.STATELESS);
+        }
+
+        @Override
+        public SourceDebugExtensionAttribute readAttribute(AttributedElement e, ClassReader cf, int p) {
+            return new BoundAttribute.BoundSourceDebugExtensionAttribute(cf, this, p);
+        }
+
+        @Override
+        protected void writeBody(BufWriter buf, SourceDebugExtensionAttribute attr) {
+            buf.writeBytes(attr.contents());
+        }
+    }
+
+    public static final class SourceFileMapper extends AbstractAttributeMapper<SourceFileAttribute> {
+        public static final SourceFileMapper INSTANCE = new SourceFileMapper();
+
+        private SourceFileMapper() {
+            super(NAME_SOURCE_FILE, AttributeStability.CP_REFS);
+        }
+
+        @Override
+        public SourceFileAttribute readAttribute(AttributedElement e, ClassReader cf, int p) {
+            return new BoundAttribute.BoundSourceFileAttribute(cf, this, p);
+        }
+
+        @Override
+        protected void writeBody(BufWriter buf, SourceFileAttribute attr) {
+            buf.writeIndex(attr.sourceFile());
+        }
+    }
+
+    public static final class SourceIDMapper extends AbstractAttributeMapper<SourceIDAttribute> {
+        public static final SourceIDMapper INSTANCE = new SourceIDMapper();
+
+        private SourceIDMapper() {
+            super(NAME_SOURCE_ID, AttributeStability.CP_REFS);
+        }
+
+        @Override
+        public SourceIDAttribute readAttribute(AttributedElement e, ClassReader cf, int p) {
+            return new BoundAttribute.BoundSourceIDAttribute(cf, this, p);
+        }
+
+        @Override
+        protected void writeBody(BufWriter buf, SourceIDAttribute attr) {
+            buf.writeIndex(attr.sourceId());
+        }
+    }
+
+    public static final class StackMapTableMapper extends AbstractAttributeMapper<StackMapTableAttribute> {
+        public static final StackMapTableMapper INSTANCE = new StackMapTableMapper();
+
+        private StackMapTableMapper() {
+            super(NAME_STACK_MAP_TABLE, AttributeStability.LABELS);
+        }
+
+        @Override
+        public StackMapTableAttribute readAttribute(AttributedElement e, ClassReader cf, int p) {
+            return new BoundAttribute.BoundStackMapTableAttribute((CodeImpl)e, cf, this, p);
+        }
+
+        @Override
+        protected void writeBody(BufWriter b, StackMapTableAttribute attr) {
+            StackMapDecoder.writeFrames(b, attr.entries());
+        }
+    }
+
+    public static final class SyntheticMapper extends AbstractAttributeMapper<SyntheticAttribute> {
+        public static final SyntheticMapper INSTANCE = new SyntheticMapper();
+
+        private SyntheticMapper() {
+            super(NAME_SYNTHETIC, AttributeStability.STATELESS, true);
+        }
+
+        @Override
+        public SyntheticAttribute readAttribute(AttributedElement e, ClassReader cf, int p) {
+            return new BoundAttribute.BoundSyntheticAttribute(cf, this, p);
+        }
+
+        @Override
+        protected void writeBody(BufWriter buf, SyntheticAttribute attr) {
+            // empty
+        }
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/classfile/impl/AbstractBoundLocalVariable.class b/tests/test_data/std/jdk/internal/classfile/impl/AbstractBoundLocalVariable.class
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diff --git a/tests/test_data/std/jdk/internal/classfile/impl/AbstractBoundLocalVariable.java b/tests/test_data/std/jdk/internal/classfile/impl/AbstractBoundLocalVariable.java
new file mode 100644
index 00000000..d3f49e31
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/classfile/impl/AbstractBoundLocalVariable.java
@@ -0,0 +1,104 @@
+/*
+ * Copyright (c) 2022, 2024, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package jdk.internal.classfile.impl;
+
+import java.lang.classfile.BufWriter;
+import java.lang.classfile.Label;
+import java.lang.classfile.constantpool.Utf8Entry;
+
+public class AbstractBoundLocalVariable
+        extends AbstractElement {
+    protected final CodeImpl code;
+    protected final int offset;
+    private Utf8Entry nameEntry;
+    private Utf8Entry secondaryEntry;
+
+    public AbstractBoundLocalVariable(CodeImpl code, int offset) {
+        this.code = code;
+        this.offset = offset;
+    }
+
+    protected int nameIndex() {
+        return code.classReader.readU2(offset + 4);
+    }
+
+    public Utf8Entry name() {
+        if (nameEntry == null)
+            nameEntry = code.constantPool().entryByIndex(nameIndex(), Utf8Entry.class);
+        return nameEntry;
+    }
+
+    protected int secondaryIndex() {
+        return code.classReader.readU2(offset + 6);
+    }
+
+    protected Utf8Entry secondaryEntry() {
+        if (secondaryEntry == null)
+            secondaryEntry = code.constantPool().entryByIndex(secondaryIndex(), Utf8Entry.class);
+        return secondaryEntry;
+    }
+
+    public Label startScope() {
+        return code.getLabel(startPc());
+    }
+
+    public Label endScope() {
+        return code.getLabel(startPc() + length());
+    }
+
+    public int startPc() {
+        return code.classReader.readU2(offset);
+    }
+
+    public int length() {
+        return code.classReader.readU2(offset+2);
+    }
+
+    public int slot() {
+        return code.classReader.readU2(offset + 8);
+    }
+
+    public boolean writeTo(BufWriter b) {
+        var lc = ((BufWriterImpl)b).labelContext();
+        int startBci = lc.labelToBci(startScope());
+        int endBci = lc.labelToBci(endScope());
+        if (startBci == -1 || endBci == -1) {
+            return false;
+        }
+        int length = endBci - startBci;
+        b.writeU2(startBci);
+        b.writeU2(length);
+        if (b.canWriteDirect(code.constantPool())) {
+            b.writeU2(nameIndex());
+            b.writeU2(secondaryIndex());
+        }
+        else {
+            b.writeIndex(name());
+            b.writeIndex(secondaryEntry());
+        }
+        b.writeU2(slot());
+        return true;
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/classfile/impl/AbstractDirectBuilder.class b/tests/test_data/std/jdk/internal/classfile/impl/AbstractDirectBuilder.class
new file mode 100644
index 0000000000000000000000000000000000000000..6be7f61bfd9635edff98a2dcaa1ddae665781b47
GIT binary patch
literal 2364
zcmb7Ge{<7D5PfGmR^lijO@l*1DIpN>4?v`$#f{yR5DKI?KbX+WlqrA6jtCco<dMz|
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zZ#Y6?-ieK~gtjHJh51;Ddsw7+-pLyp8F{)&TbX)``S&ROf>C-XRNvwz6UYUpGaj74
z9r~cCQG(?@64Nn>Y5KrnX%Z4_3rVo;8?rqh#4JQHV)Kw5LSB!sPNodL#bX)^<l4k0
Iw(rjT3k~X9a{vGU

literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/classfile/impl/AbstractDirectBuilder.java b/tests/test_data/std/jdk/internal/classfile/impl/AbstractDirectBuilder.java
new file mode 100644
index 00000000..13c2a5fb
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/classfile/impl/AbstractDirectBuilder.java
@@ -0,0 +1,59 @@
+/*
+ * Copyright (c) 2022, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package jdk.internal.classfile.impl;
+
+import java.util.Optional;
+
+import java.lang.classfile.Attribute;
+
+public class AbstractDirectBuilder<M> {
+    protected final SplitConstantPool constantPool;
+    protected final ClassFileImpl context;
+    protected final AttributeHolder attributes = new AttributeHolder();
+    protected M original;
+
+    public AbstractDirectBuilder(SplitConstantPool constantPool, ClassFileImpl context) {
+        this.constantPool = constantPool;
+        this.context = context;
+    }
+
+    public SplitConstantPool constantPool() {
+        return constantPool;
+    }
+
+    public Optional<M> original() {
+        return Optional.ofNullable(original);
+    }
+
+    public void setOriginal(M original) {
+        this.original = original;
+    }
+
+    public void writeAttribute(Attribute<?> a) {
+        if (Util.isAttributeAllowed(a, context.attributesProcessingOption())) {
+            attributes.withAttribute(a);
+        }
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/classfile/impl/AbstractElement.class b/tests/test_data/std/jdk/internal/classfile/impl/AbstractElement.class
new file mode 100644
index 0000000000000000000000000000000000000000..580bfe2fab1eea7fccb49f8a971e6217faad40b6
GIT binary patch
literal 1112
zcmb7?%TL=t5XQfOfN4kxuTowWsyOfxxU{{2DwWqMz@ao!k868@4IA59Zz%s(Pe`rQ
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zhp`q#ajCQnRWsM&=cuqo#P(RrrcBwfbeJWQP_3y{p0%2hG#4V$+?lRrvCws4l&ibV
zlD$?1VY~JWk3B;0-6$(BGQ#`yC#6Tq@IAO+I%p}KNVB(5XL-~q2;no;gb!YZ?vi>P
z-}(6TiU=Qlj83J!&XQiIT@R;zmFJmGl+=ArK4<C^5z1e(mWkyFuMc7N(eCWH%`Clz
z+iLfWfZSeltZ)_bn_PGE9`u8gA-v@1J_E~`;8^Jlpo&SZ2veBm=*0Ux?Vw}75PZAG
zi$9$A>Q~zOxz0>i&(oN}EE62*l_zO+AZe~kdhJPC8%Ub(k`_EkTLVdpZPHTvHkSVb
D02m3_

literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/classfile/impl/AbstractElement.java b/tests/test_data/std/jdk/internal/classfile/impl/AbstractElement.java
new file mode 100644
index 00000000..37081ca5
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/classfile/impl/AbstractElement.java
@@ -0,0 +1,45 @@
+/*
+ * Copyright (c) 2022, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package jdk.internal.classfile.impl;
+
+public abstract class AbstractElement {
+    public AbstractElement() { }
+
+    public void writeTo(DirectCodeBuilder builder) {
+        throw new UnsupportedOperationException();
+    }
+
+    public void writeTo(DirectClassBuilder builder) {
+        throw new UnsupportedOperationException();
+    }
+
+    public void writeTo(DirectMethodBuilder builder) {
+        throw new UnsupportedOperationException();
+    }
+
+    public void writeTo(DirectFieldBuilder builder) {
+        throw new UnsupportedOperationException();
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/classfile/impl/AbstractInstruction$BoundArgumentConstantInstruction.class b/tests/test_data/std/jdk/internal/classfile/impl/AbstractInstruction$BoundArgumentConstantInstruction.class
new file mode 100644
index 0000000000000000000000000000000000000000..f8a3cbf50e10a28423091c0e737773ca60e16e1c
GIT binary patch
literal 2140
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/classfile/impl/AbstractInstruction$BoundBranchInstruction.class b/tests/test_data/std/jdk/internal/classfile/impl/AbstractInstruction$BoundBranchInstruction.class
new file mode 100644
index 0000000000000000000000000000000000000000..7c36153eb5272765476b6268513a1c8902bcea35
GIT binary patch
literal 2214
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/classfile/impl/AbstractInstruction$BoundFieldInstruction.class b/tests/test_data/std/jdk/internal/classfile/impl/AbstractInstruction$BoundFieldInstruction.class
new file mode 100644
index 0000000000000000000000000000000000000000..901ab76f3e5e7e8bde956ef8adf3aba0934812e9
GIT binary patch
literal 2816
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/classfile/impl/AbstractInstruction$BoundIncrementInstruction.class b/tests/test_data/std/jdk/internal/classfile/impl/AbstractInstruction$BoundIncrementInstruction.class
new file mode 100644
index 0000000000000000000000000000000000000000..037a3a4619ff791f22466608ef30b5093de375d1
GIT binary patch
literal 1965
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diff --git a/tests/test_data/std/jdk/internal/classfile/impl/AbstractInstruction$BoundInstruction.class b/tests/test_data/std/jdk/internal/classfile/impl/AbstractInstruction$BoundInstruction.class
new file mode 100644
index 0000000000000000000000000000000000000000..dba846f8769e33c4541184ac65d1f4ffba75072d
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diff --git a/tests/test_data/std/jdk/internal/classfile/impl/AbstractInstruction$BoundInvokeDynamicInstruction.class b/tests/test_data/std/jdk/internal/classfile/impl/AbstractInstruction$BoundInvokeDynamicInstruction.class
new file mode 100644
index 0000000000000000000000000000000000000000..0e4b21394259c605f6e8bfc019d6fa4fe82b5cf9
GIT binary patch
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diff --git a/tests/test_data/std/jdk/internal/classfile/impl/AbstractInstruction$BoundInvokeInstruction.class b/tests/test_data/std/jdk/internal/classfile/impl/AbstractInstruction$BoundInvokeInstruction.class
new file mode 100644
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diff --git a/tests/test_data/std/jdk/internal/classfile/impl/AbstractInstruction$BoundInvokeInterfaceInstruction.class b/tests/test_data/std/jdk/internal/classfile/impl/AbstractInstruction$BoundInvokeInterfaceInstruction.class
new file mode 100644
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GIT binary patch
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diff --git a/tests/test_data/std/jdk/internal/classfile/impl/AbstractInstruction$BoundJsrInstruction.class b/tests/test_data/std/jdk/internal/classfile/impl/AbstractInstruction$BoundJsrInstruction.class
new file mode 100644
index 0000000000000000000000000000000000000000..df4181da4a021222580b25a80424ea9ea437fe3f
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diff --git a/tests/test_data/std/jdk/internal/classfile/impl/AbstractInstruction$BoundLoadConstantInstruction.class b/tests/test_data/std/jdk/internal/classfile/impl/AbstractInstruction$BoundLoadConstantInstruction.class
new file mode 100644
index 0000000000000000000000000000000000000000..4aa33bb6ddf382b79f1966d0b3032cfc4232834b
GIT binary patch
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diff --git a/tests/test_data/std/jdk/internal/classfile/impl/AbstractInstruction$BoundLoadInstruction.class b/tests/test_data/std/jdk/internal/classfile/impl/AbstractInstruction$BoundLoadInstruction.class
new file mode 100644
index 0000000000000000000000000000000000000000..63747de6a7ee5725cac31f13a5945c0443c44b21
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diff --git a/tests/test_data/std/jdk/internal/classfile/impl/AbstractInstruction$BoundLookupSwitchInstruction.class b/tests/test_data/std/jdk/internal/classfile/impl/AbstractInstruction$BoundLookupSwitchInstruction.class
new file mode 100644
index 0000000000000000000000000000000000000000..854bbe1ba78e2626a1a1c1520801ba8df82a4004
GIT binary patch
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diff --git a/tests/test_data/std/jdk/internal/classfile/impl/AbstractInstruction$BoundNewMultidimensionalArrayInstruction.class b/tests/test_data/std/jdk/internal/classfile/impl/AbstractInstruction$BoundNewMultidimensionalArrayInstruction.class
new file mode 100644
index 0000000000000000000000000000000000000000..c43577d61b9045f1f8a2bbe0cc723fcba9692891
GIT binary patch
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diff --git a/tests/test_data/std/jdk/internal/classfile/impl/AbstractInstruction$BoundNewObjectInstruction.class b/tests/test_data/std/jdk/internal/classfile/impl/AbstractInstruction$BoundNewObjectInstruction.class
new file mode 100644
index 0000000000000000000000000000000000000000..247c33f83f49b6e315abc99d2014657916d0049a
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diff --git a/tests/test_data/std/jdk/internal/classfile/impl/AbstractInstruction$BoundNewPrimitiveArrayInstruction.class b/tests/test_data/std/jdk/internal/classfile/impl/AbstractInstruction$BoundNewPrimitiveArrayInstruction.class
new file mode 100644
index 0000000000000000000000000000000000000000..29504bdd23646f677b804fc84b1f9c3480dacc77
GIT binary patch
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diff --git a/tests/test_data/std/jdk/internal/classfile/impl/AbstractInstruction$BoundNewReferenceArrayInstruction.class b/tests/test_data/std/jdk/internal/classfile/impl/AbstractInstruction$BoundNewReferenceArrayInstruction.class
new file mode 100644
index 0000000000000000000000000000000000000000..4225c19e90534a0377ebf0be0348d0deb03c215b
GIT binary patch
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diff --git a/tests/test_data/std/jdk/internal/classfile/impl/AbstractInstruction$BoundRetInstruction.class b/tests/test_data/std/jdk/internal/classfile/impl/AbstractInstruction$BoundRetInstruction.class
new file mode 100644
index 0000000000000000000000000000000000000000..55c7f13a1e9cddd09a7d429dcf0253a4206f0e85
GIT binary patch
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diff --git a/tests/test_data/std/jdk/internal/classfile/impl/AbstractInstruction$BoundStoreInstruction.class b/tests/test_data/std/jdk/internal/classfile/impl/AbstractInstruction$BoundStoreInstruction.class
new file mode 100644
index 0000000000000000000000000000000000000000..277d7e6a6841ab6b17dbd485f932f9f620c0c1b9
GIT binary patch
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/classfile/impl/AbstractInstruction$BoundTableSwitchInstruction.class b/tests/test_data/std/jdk/internal/classfile/impl/AbstractInstruction$BoundTableSwitchInstruction.class
new file mode 100644
index 0000000000000000000000000000000000000000..d122ce5839543103e3e6e9ab5d99f35cf81e7708
GIT binary patch
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/classfile/impl/AbstractInstruction$BoundTypeCheckInstruction.class b/tests/test_data/std/jdk/internal/classfile/impl/AbstractInstruction$BoundTypeCheckInstruction.class
new file mode 100644
index 0000000000000000000000000000000000000000..519a3f7514068a39fb20069f954260124f57263e
GIT binary patch
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HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/classfile/impl/AbstractInstruction$SwitchCaseImpl.class b/tests/test_data/std/jdk/internal/classfile/impl/AbstractInstruction$SwitchCaseImpl.class
new file mode 100644
index 0000000000000000000000000000000000000000..c07aaed721f64e9ac06a54f719a30339da8ccab7
GIT binary patch
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/classfile/impl/AbstractInstruction$UnboundArgumentConstantInstruction.class b/tests/test_data/std/jdk/internal/classfile/impl/AbstractInstruction$UnboundArgumentConstantInstruction.class
new file mode 100644
index 0000000000000000000000000000000000000000..69f407b3ab8567034cdb1bd196ca2955a60ebc2f
GIT binary patch
literal 1879
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/classfile/impl/AbstractInstruction$UnboundArrayLoadInstruction.class b/tests/test_data/std/jdk/internal/classfile/impl/AbstractInstruction$UnboundArrayLoadInstruction.class
new file mode 100644
index 0000000000000000000000000000000000000000..d7cb7e574be5c6a8dcf8bdf06e02790f3fdcdeaa
GIT binary patch
literal 925
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/classfile/impl/AbstractInstruction$UnboundArrayStoreInstruction.class b/tests/test_data/std/jdk/internal/classfile/impl/AbstractInstruction$UnboundArrayStoreInstruction.class
new file mode 100644
index 0000000000000000000000000000000000000000..39b774712e39ad2a330528702366a6ff2203681b
GIT binary patch
literal 929
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/classfile/impl/AbstractInstruction$UnboundBranchInstruction.class b/tests/test_data/std/jdk/internal/classfile/impl/AbstractInstruction$UnboundBranchInstruction.class
new file mode 100644
index 0000000000000000000000000000000000000000..4716d8d5bf99b2ad3f8c823fe7d73a4d78975e8e
GIT binary patch
literal 1554
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/classfile/impl/AbstractInstruction$UnboundConvertInstruction.class b/tests/test_data/std/jdk/internal/classfile/impl/AbstractInstruction$UnboundConvertInstruction.class
new file mode 100644
index 0000000000000000000000000000000000000000..91dced49515ec0e33293dc9f6c8c63742d863d06
GIT binary patch
literal 1020
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/classfile/impl/AbstractInstruction$UnboundFieldInstruction.class b/tests/test_data/std/jdk/internal/classfile/impl/AbstractInstruction$UnboundFieldInstruction.class
new file mode 100644
index 0000000000000000000000000000000000000000..0eaa090fdf53d98c0b398fdb3a47a6dd5c3db2c9
GIT binary patch
literal 1980
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/classfile/impl/AbstractInstruction$UnboundIncrementInstruction.class b/tests/test_data/std/jdk/internal/classfile/impl/AbstractInstruction$UnboundIncrementInstruction.class
new file mode 100644
index 0000000000000000000000000000000000000000..e3c74cf33625b336ec9001ccd40ebbe4d6b2cbb9
GIT binary patch
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/classfile/impl/AbstractInstruction$UnboundInstruction.class b/tests/test_data/std/jdk/internal/classfile/impl/AbstractInstruction$UnboundInstruction.class
new file mode 100644
index 0000000000000000000000000000000000000000..06fead7c019c4c88416372ac04923ebe9f42616f
GIT binary patch
literal 4721
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/classfile/impl/AbstractInstruction$UnboundIntrinsicConstantInstruction.class b/tests/test_data/std/jdk/internal/classfile/impl/AbstractInstruction$UnboundIntrinsicConstantInstruction.class
new file mode 100644
index 0000000000000000000000000000000000000000..931492e85eaff50f8c267e0bb43a10716e9d84f6
GIT binary patch
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diff --git a/tests/test_data/std/jdk/internal/classfile/impl/AbstractInstruction$UnboundInvokeDynamicInstruction.class b/tests/test_data/std/jdk/internal/classfile/impl/AbstractInstruction$UnboundInvokeDynamicInstruction.class
new file mode 100644
index 0000000000000000000000000000000000000000..ab423bc721a6612e7a10e47f874006a7a6d1c69d
GIT binary patch
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diff --git a/tests/test_data/std/jdk/internal/classfile/impl/AbstractInstruction$UnboundInvokeInstruction.class b/tests/test_data/std/jdk/internal/classfile/impl/AbstractInstruction$UnboundInvokeInstruction.class
new file mode 100644
index 0000000000000000000000000000000000000000..7a55dc92cbdde9a5866c8705ddbd6057afa0213b
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diff --git a/tests/test_data/std/jdk/internal/classfile/impl/AbstractInstruction$UnboundJsrInstruction.class b/tests/test_data/std/jdk/internal/classfile/impl/AbstractInstruction$UnboundJsrInstruction.class
new file mode 100644
index 0000000000000000000000000000000000000000..3b4ce3e6af22916265cdb98231fb8c928a99f160
GIT binary patch
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diff --git a/tests/test_data/std/jdk/internal/classfile/impl/AbstractInstruction$UnboundLoadConstantInstruction.class b/tests/test_data/std/jdk/internal/classfile/impl/AbstractInstruction$UnboundLoadConstantInstruction.class
new file mode 100644
index 0000000000000000000000000000000000000000..5c30a57ada6d425142aac3dc9e96e0d52f1957d9
GIT binary patch
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diff --git a/tests/test_data/std/jdk/internal/classfile/impl/AbstractInstruction$UnboundLoadInstruction.class b/tests/test_data/std/jdk/internal/classfile/impl/AbstractInstruction$UnboundLoadInstruction.class
new file mode 100644
index 0000000000000000000000000000000000000000..e93d68920b2571787ff943244fee3e508506d869
GIT binary patch
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diff --git a/tests/test_data/std/jdk/internal/classfile/impl/AbstractInstruction$UnboundLookupSwitchInstruction.class b/tests/test_data/std/jdk/internal/classfile/impl/AbstractInstruction$UnboundLookupSwitchInstruction.class
new file mode 100644
index 0000000000000000000000000000000000000000..5ad008084ee4116c2700acd9bb908b2a48d912a2
GIT binary patch
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diff --git a/tests/test_data/std/jdk/internal/classfile/impl/AbstractInstruction$UnboundMonitorInstruction.class b/tests/test_data/std/jdk/internal/classfile/impl/AbstractInstruction$UnboundMonitorInstruction.class
new file mode 100644
index 0000000000000000000000000000000000000000..bf55c540b35d6a8bc01552693015f99a40e8e39c
GIT binary patch
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diff --git a/tests/test_data/std/jdk/internal/classfile/impl/AbstractInstruction$UnboundNewMultidimensionalArrayInstruction.class b/tests/test_data/std/jdk/internal/classfile/impl/AbstractInstruction$UnboundNewMultidimensionalArrayInstruction.class
new file mode 100644
index 0000000000000000000000000000000000000000..f4564b7cd4c8e443678111be87962f2ac164f1d2
GIT binary patch
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/classfile/impl/AbstractInstruction$UnboundNewObjectInstruction.class b/tests/test_data/std/jdk/internal/classfile/impl/AbstractInstruction$UnboundNewObjectInstruction.class
new file mode 100644
index 0000000000000000000000000000000000000000..1dd295a0c217ad10e4ce935fa9662fcfc0cdb62a
GIT binary patch
literal 1739
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/classfile/impl/AbstractInstruction$UnboundNewPrimitiveArrayInstruction.class b/tests/test_data/std/jdk/internal/classfile/impl/AbstractInstruction$UnboundNewPrimitiveArrayInstruction.class
new file mode 100644
index 0000000000000000000000000000000000000000..9b3b869adb48040d01a6cac8c67f3bd7093801c3
GIT binary patch
literal 1730
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/classfile/impl/AbstractInstruction$UnboundNewReferenceArrayInstruction.class b/tests/test_data/std/jdk/internal/classfile/impl/AbstractInstruction$UnboundNewReferenceArrayInstruction.class
new file mode 100644
index 0000000000000000000000000000000000000000..63cf7da5e3ca727c6d14fbcb6c069a0c28baeaf6
GIT binary patch
literal 1802
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/classfile/impl/AbstractInstruction$UnboundNopInstruction.class b/tests/test_data/std/jdk/internal/classfile/impl/AbstractInstruction$UnboundNopInstruction.class
new file mode 100644
index 0000000000000000000000000000000000000000..da252361b815d5eca56d30dcd45608b350e01f3b
GIT binary patch
literal 762
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/classfile/impl/AbstractInstruction$UnboundOperatorInstruction.class b/tests/test_data/std/jdk/internal/classfile/impl/AbstractInstruction$UnboundOperatorInstruction.class
new file mode 100644
index 0000000000000000000000000000000000000000..abfc1bf48d9ae13431bec67a1b35b45d5bd89881
GIT binary patch
literal 921
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/classfile/impl/AbstractInstruction$UnboundRetInstruction.class b/tests/test_data/std/jdk/internal/classfile/impl/AbstractInstruction$UnboundRetInstruction.class
new file mode 100644
index 0000000000000000000000000000000000000000..ddd03c5311f99a16cf2385fce332dab000e065ba
GIT binary patch
literal 1580
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/classfile/impl/AbstractInstruction$UnboundReturnInstruction.class b/tests/test_data/std/jdk/internal/classfile/impl/AbstractInstruction$UnboundReturnInstruction.class
new file mode 100644
index 0000000000000000000000000000000000000000..3b1bb650b2ba78662ecfabbc3efdc42c31f25e37
GIT binary patch
literal 1214
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/classfile/impl/AbstractInstruction$UnboundStackInstruction.class b/tests/test_data/std/jdk/internal/classfile/impl/AbstractInstruction$UnboundStackInstruction.class
new file mode 100644
index 0000000000000000000000000000000000000000..f386857df835f044e649e156141af40db09e23fc
GIT binary patch
literal 729
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/classfile/impl/AbstractInstruction$UnboundStoreInstruction.class b/tests/test_data/std/jdk/internal/classfile/impl/AbstractInstruction$UnboundStoreInstruction.class
new file mode 100644
index 0000000000000000000000000000000000000000..da19d550d14fb034fce342b2ff7c6e47b10801dd
GIT binary patch
literal 1738
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/classfile/impl/AbstractInstruction$UnboundTableSwitchInstruction.class b/tests/test_data/std/jdk/internal/classfile/impl/AbstractInstruction$UnboundTableSwitchInstruction.class
new file mode 100644
index 0000000000000000000000000000000000000000..764cf992d793046d065d10118e415af2b8b4908f
GIT binary patch
literal 2391
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/classfile/impl/AbstractInstruction$UnboundThrowInstruction.class b/tests/test_data/std/jdk/internal/classfile/impl/AbstractInstruction$UnboundThrowInstruction.class
new file mode 100644
index 0000000000000000000000000000000000000000..4713fed4ef66162869aaf8a1cace70efcd6abae4
GIT binary patch
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HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/classfile/impl/AbstractInstruction$UnboundTypeCheckInstruction.class b/tests/test_data/std/jdk/internal/classfile/impl/AbstractInstruction$UnboundTypeCheckInstruction.class
new file mode 100644
index 0000000000000000000000000000000000000000..f59b7c6b86ccd92d2ede6389294af9c205f13a3c
GIT binary patch
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diff --git a/tests/test_data/std/jdk/internal/classfile/impl/AbstractInstruction.class b/tests/test_data/std/jdk/internal/classfile/impl/AbstractInstruction.class
new file mode 100644
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GIT binary patch
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HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/classfile/impl/AbstractInstruction.java b/tests/test_data/std/jdk/internal/classfile/impl/AbstractInstruction.java
new file mode 100644
index 00000000..0e528cd0
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/classfile/impl/AbstractInstruction.java
@@ -0,0 +1,1453 @@
+/*
+ * Copyright (c) 2022, 2024, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package jdk.internal.classfile.impl;
+
+import java.lang.constant.ConstantDesc;
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.List;
+import java.lang.classfile.ClassFile;
+import java.lang.classfile.Instruction;
+import java.lang.classfile.constantpool.ClassEntry;
+import java.lang.classfile.instruction.SwitchCase;
+import java.lang.classfile.constantpool.FieldRefEntry;
+import java.lang.classfile.constantpool.InterfaceMethodRefEntry;
+import java.lang.classfile.constantpool.InvokeDynamicEntry;
+import java.lang.classfile.constantpool.LoadableConstantEntry;
+import java.lang.classfile.constantpool.MemberRefEntry;
+import java.lang.classfile.instruction.ArrayLoadInstruction;
+import java.lang.classfile.instruction.ArrayStoreInstruction;
+import java.lang.classfile.instruction.BranchInstruction;
+import java.lang.classfile.instruction.ConstantInstruction;
+import java.lang.classfile.instruction.ConvertInstruction;
+import java.lang.classfile.instruction.DiscontinuedInstruction;
+import java.lang.classfile.instruction.FieldInstruction;
+import java.lang.classfile.instruction.IncrementInstruction;
+import java.lang.classfile.instruction.InvokeDynamicInstruction;
+import java.lang.classfile.instruction.InvokeInstruction;
+import java.lang.classfile.instruction.LoadInstruction;
+import java.lang.classfile.instruction.LookupSwitchInstruction;
+import java.lang.classfile.instruction.MonitorInstruction;
+import java.lang.classfile.instruction.NewMultiArrayInstruction;
+import java.lang.classfile.instruction.NewObjectInstruction;
+import java.lang.classfile.instruction.NewPrimitiveArrayInstruction;
+import java.lang.classfile.instruction.NewReferenceArrayInstruction;
+import java.lang.classfile.instruction.NopInstruction;
+import java.lang.classfile.instruction.OperatorInstruction;
+import java.lang.classfile.instruction.ReturnInstruction;
+import java.lang.classfile.instruction.StackInstruction;
+import java.lang.classfile.instruction.StoreInstruction;
+import java.lang.classfile.instruction.TableSwitchInstruction;
+import java.lang.classfile.instruction.ThrowInstruction;
+import java.lang.classfile.instruction.TypeCheckInstruction;
+import java.lang.classfile.Label;
+import java.lang.classfile.Opcode;
+import java.lang.classfile.TypeKind;
+
+public abstract sealed class AbstractInstruction
+        extends AbstractElement
+        implements Instruction {
+
+    private static final String
+            FMT_ArgumentConstant = "ArgumentConstant[OP=%s, val=%s]",
+            FMT_Branch = "Branch[OP=%s]",
+            FMT_Field = "Field[OP=%s, field=%s.%s:%s]",
+            FMT_Increment = "Increment[OP=%s, slot=%d, val=%d]",
+            FMT_Invoke = "Invoke[OP=%s, m=%s.%s%s]",
+            FMT_InvokeDynamic = "InvokeDynamic[OP=%s, bsm=%s %s]",
+            FMT_InvokeInterface = "InvokeInterface[OP=%s, m=%s.%s%s]",
+            FMT_Load = "Load[OP=%s, slot=%d]",
+            FMT_LoadConstant = "LoadConstant[OP=%s, val=%s]",
+            FMT_LookupSwitch = "LookupSwitch[OP=%s]",
+            FMT_NewMultiArray = "NewMultiArray[OP=%s, type=%s[%d]]",
+            FMT_NewObj = "NewObj[OP=%s, type=%s]",
+            FMT_NewPrimitiveArray = "NewPrimitiveArray[OP=%s, type=%s]",
+            FMT_NewRefArray = "NewRefArray[OP=%s, type=%s]",
+            FMT_Return = "Return[OP=%s]",
+            FMT_Store = "Store[OP=%s, slot=%d]",
+            FMT_TableSwitch = "TableSwitch[OP=%s]",
+            FMT_Throw = "Throw[OP=%s]",
+            FMT_TypeCheck = "TypeCheck[OP=%s, type=%s]",
+            FMT_Unbound = "%s[op=%s]",
+            FMT_Discontinued = "Discontinued[OP=%s]";
+
+    final Opcode op;
+    final int size;
+
+    @Override
+    public Opcode opcode() {
+        return op;
+    }
+
+    @Override
+    public int sizeInBytes() {
+        return size;
+    }
+
+    public AbstractInstruction(Opcode op, int size) {
+        this.op = op;
+        this.size = size;
+    }
+
+    @Override
+    public abstract void writeTo(DirectCodeBuilder writer);
+
+    public abstract static sealed class BoundInstruction extends AbstractInstruction {
+        final CodeImpl code;
+        final int pos;
+
+        protected BoundInstruction(Opcode op, int size, CodeImpl code, int pos) {
+            super(op, size);
+            this.code = code;
+            this.pos = pos;
+        }
+
+        protected Label offsetToLabel(int offset) {
+            return code.getLabel(pos - code.codeStart + offset);
+        }
+
+        @Override
+        public void writeTo(DirectCodeBuilder writer) {
+            // Override this if the instruction has any CP references or labels!
+            code.classReader.copyBytesTo(writer.bytecodesBufWriter, pos, size);
+        }
+    }
+
+    public static final class BoundLoadInstruction
+            extends BoundInstruction implements LoadInstruction {
+
+        public BoundLoadInstruction(Opcode op, CodeImpl code, int pos) {
+            super(op, op.sizeIfFixed(), code, pos);
+        }
+
+
+        @Override
+        public TypeKind typeKind() {
+            return op.primaryTypeKind();
+        }
+
+        @Override
+        public String toString() {
+            return String.format(FMT_Load, this.opcode(), slot());
+        }
+
+        @Override
+        public int slot() {
+            return switch (size) {
+                case 2 -> code.classReader.readU1(pos + 1);
+                case 4 -> code.classReader.readU2(pos + 2);
+                default -> throw new IllegalArgumentException("Unexpected op size: " + op.sizeIfFixed() + " -- " + op);
+            };
+        }
+
+    }
+
+    public static final class BoundStoreInstruction
+            extends BoundInstruction implements StoreInstruction {
+
+        public BoundStoreInstruction(Opcode op, CodeImpl code, int pos) {
+            super(op, op.sizeIfFixed(), code, pos);
+        }
+
+        @Override
+        public TypeKind typeKind() {
+            return op.primaryTypeKind();
+        }
+
+        @Override
+        public String toString() {
+            return String.format(FMT_Store, this.opcode(), slot());
+        }
+
+        @Override
+        public int slot() {
+            return switch (size) {
+                case 2 -> code.classReader.readU1(pos + 1);
+                case 4 -> code.classReader.readU2(pos + 2);
+                default -> throw new IllegalArgumentException("Unexpected op size: " + size + " -- " + op);
+            };
+        }
+
+    }
+
+    public static final class BoundIncrementInstruction
+            extends BoundInstruction implements IncrementInstruction {
+
+        public BoundIncrementInstruction(Opcode op, CodeImpl code, int pos) {
+            super(op, op.sizeIfFixed(), code, pos);
+        }
+
+        @Override
+        public int slot() {
+            return size == 6 ? code.classReader.readU2(pos + 2) : code.classReader.readU1(pos + 1);
+        }
+
+        @Override
+        public int constant() {
+            return size == 6 ? code.classReader.readS2(pos + 4) : (byte) code.classReader.readS1(pos + 2);
+        }
+
+        @Override
+        public String toString() {
+            return String.format(FMT_Increment, this.opcode(), slot(), constant());
+        }
+
+    }
+
+    public static final class BoundBranchInstruction
+            extends BoundInstruction implements BranchInstruction {
+
+        public BoundBranchInstruction(Opcode op, CodeImpl code, int pos) {
+            super(op, op.sizeIfFixed(), code, pos);
+        }
+
+        @Override
+        public Label target() {
+            return offsetToLabel(branchByteOffset());
+        }
+
+        public int branchByteOffset() {
+            return size == 3
+                   ? (int) (short) code.classReader.readU2(pos + 1)
+                   : code.classReader.readInt(pos + 1);
+        }
+
+        @Override
+        public void writeTo(DirectCodeBuilder writer) {
+            writer.writeBranch(opcode(), target());
+        }
+
+        @Override
+        public String toString() {
+            return String.format(FMT_Branch, this.opcode());
+        }
+
+    }
+
+    public record SwitchCaseImpl(int caseValue, Label target)
+            implements SwitchCase {
+    }
+
+    public static final class BoundLookupSwitchInstruction
+            extends BoundInstruction implements LookupSwitchInstruction {
+
+        // will always need size, cache everything to there
+        private final int afterPad;
+        private final int npairs;
+
+        BoundLookupSwitchInstruction(Opcode op, CodeImpl code, int pos) {
+            super(op, size(code, code.codeStart, pos), code, pos);
+
+            this.afterPad = pos + 1 + ((4 - ((pos + 1 - code.codeStart) & 3)) & 3);
+            this.npairs = code.classReader.readInt(afterPad + 4);
+            if (npairs < 0 || npairs > code.codeLength >> 3) {
+                throw new IllegalArgumentException("Invalid lookupswitch npairs value: " + npairs);
+            }
+        }
+
+        static int size(CodeImpl code, int codeStart, int pos) {
+            int afterPad = pos + 1 + ((4 - ((pos + 1 - codeStart) & 3)) & 3);
+            int pad = afterPad - (pos + 1);
+            int npairs = code.classReader.readInt(afterPad + 4);
+            return 1 + pad + 8 + npairs * 8;
+        }
+
+        private int defaultOffset() {
+            return code.classReader.readInt(afterPad);
+        }
+
+        @Override
+        public List<SwitchCase> cases() {
+            var cases = new SwitchCase[npairs];
+            for (int i = 0; i < npairs; ++i) {
+                int z = afterPad + 8 + 8 * i;
+                cases[i] = SwitchCase.of(code.classReader.readInt(z), offsetToLabel(code.classReader.readInt(z + 4)));
+            }
+            return List.of(cases);
+        }
+
+        @Override
+        public Label defaultTarget() {
+            return offsetToLabel(defaultOffset());
+        }
+
+        @Override
+        public void writeTo(DirectCodeBuilder writer) {
+            writer.writeLookupSwitch(defaultTarget(), cases());
+        }
+
+        @Override
+        public String toString() {
+            return String.format(FMT_LookupSwitch, this.opcode());
+        }
+
+    }
+
+    public static final class BoundTableSwitchInstruction
+            extends BoundInstruction implements TableSwitchInstruction {
+
+        BoundTableSwitchInstruction(Opcode op, CodeImpl code, int pos) {
+            super(op, size(code, code.codeStart, pos), code, pos);
+        }
+
+        static int size(CodeImpl code, int codeStart, int pos) {
+            int ap = pos + 1 + ((4 - ((pos + 1 - codeStart) & 3)) & 3);
+            int pad = ap - (pos + 1);
+            int low = code.classReader.readInt(ap + 4);
+            int high = code.classReader.readInt(ap + 8);
+            if (high < low || high - low > code.codeLength >> 2) {
+                throw new IllegalArgumentException("Invalid tableswitch values low: " + low + " high: " + high);
+            }
+            int cnt = high - low + 1;
+            return 1 + pad + 12 + cnt * 4;
+        }
+
+        private int afterPadding() {
+            int p = pos;
+            return p + 1 + ((4 - ((p + 1 - code.codeStart) & 3)) & 3);
+        }
+
+        @Override
+        public Label defaultTarget() {
+            return offsetToLabel(defaultOffset());
+        }
+
+        @Override
+        public int lowValue() {
+            return code.classReader.readInt(afterPadding() + 4);
+        }
+
+        @Override
+        public int highValue() {
+            return code.classReader.readInt(afterPadding() + 8);
+        }
+
+        @Override
+        public List<SwitchCase> cases() {
+            int low = lowValue();
+            int high = highValue();
+            int defOff = defaultOffset();
+            var cases = new ArrayList<SwitchCase>(high - low + 1);
+            int z = afterPadding() + 12;
+            for (int i = lowValue(); i <= high; ++i) {
+                int off = code.classReader.readInt(z);
+                if (defOff != off) {
+                    cases.add(SwitchCase.of(i, offsetToLabel(off)));
+                }
+                z += 4;
+            }
+            return Collections.unmodifiableList(cases);
+        }
+
+        private int defaultOffset() {
+            return code.classReader.readInt(afterPadding());
+        }
+
+        @Override
+        public void writeTo(DirectCodeBuilder writer) {
+            writer.writeTableSwitch(lowValue(), highValue(), defaultTarget(), cases());
+        }
+
+        @Override
+        public String toString() {
+            return String.format(FMT_TableSwitch, this.opcode());
+        }
+
+    }
+
+    public static final class BoundFieldInstruction
+            extends BoundInstruction implements FieldInstruction {
+
+        private FieldRefEntry fieldEntry;
+
+        public BoundFieldInstruction(Opcode op, CodeImpl code, int pos) {
+            super(op, op.sizeIfFixed(), code, pos);
+        }
+
+        @Override
+        public FieldRefEntry field() {
+            if (fieldEntry == null)
+                fieldEntry = code.classReader.readEntry(pos + 1, FieldRefEntry.class);
+            return fieldEntry;
+        }
+
+        @Override
+        public void writeTo(DirectCodeBuilder writer) {
+            if (writer.canWriteDirect(code.constantPool()))
+                super.writeTo(writer);
+            else
+                writer.writeFieldAccess(op, field());
+        }
+
+        @Override
+        public String toString() {
+            return String.format(FMT_Field, this.opcode(), owner().asInternalName(), name().stringValue(), type().stringValue());
+        }
+
+    }
+
+    public static final class BoundInvokeInstruction
+            extends BoundInstruction implements InvokeInstruction {
+        MemberRefEntry methodEntry;
+
+        public BoundInvokeInstruction(Opcode op, CodeImpl code, int pos) {
+            super(op, op.sizeIfFixed(), code, pos);
+        }
+
+        @Override
+        public MemberRefEntry method() {
+            if (methodEntry == null)
+                methodEntry = code.classReader.readEntry(pos + 1, MemberRefEntry.class);
+            return methodEntry;
+        }
+
+        @Override
+        public boolean isInterface() {
+            return method().tag() == ClassFile.TAG_INTERFACEMETHODREF;
+        }
+
+        @Override
+        public int count() {
+            return 0;
+        }
+
+        @Override
+        public void writeTo(DirectCodeBuilder writer) {
+            if (writer.canWriteDirect(code.constantPool()))
+                super.writeTo(writer);
+            else
+                writer.writeInvokeNormal(op, method());
+        }
+
+        @Override
+        public String toString() {
+            return String.format(FMT_Invoke, this.opcode(), owner().asInternalName(), name().stringValue(), type().stringValue());
+        }
+
+    }
+
+    public static final class BoundInvokeInterfaceInstruction
+            extends BoundInstruction implements InvokeInstruction {
+        InterfaceMethodRefEntry methodEntry;
+
+        public BoundInvokeInterfaceInstruction(Opcode op, CodeImpl code, int pos) {
+            super(op, op.sizeIfFixed(), code, pos);
+        }
+
+        @Override
+        public MemberRefEntry method() {
+            if (methodEntry == null)
+                methodEntry = code.classReader.readEntry(pos + 1, InterfaceMethodRefEntry.class);
+            return methodEntry;
+        }
+
+        @Override
+        public int count() {
+            return code.classReader.readU1(pos + 3);
+        }
+
+        @Override
+        public boolean isInterface() {
+            return true;
+        }
+
+        @Override
+        public void writeTo(DirectCodeBuilder writer) {
+            if (writer.canWriteDirect(code.constantPool()))
+                super.writeTo(writer);
+            else
+                writer.writeInvokeInterface(op, (InterfaceMethodRefEntry) method(), count());
+        }
+
+        @Override
+        public String toString() {
+            return String.format(FMT_InvokeInterface, this.opcode(), owner().asInternalName(), name().stringValue(), type().stringValue());
+        }
+
+    }
+
+    public static final class BoundInvokeDynamicInstruction
+            extends BoundInstruction implements InvokeDynamicInstruction {
+        InvokeDynamicEntry indyEntry;
+
+        BoundInvokeDynamicInstruction(Opcode op, CodeImpl code, int pos) {
+            super(op, op.sizeIfFixed(), code, pos);
+        }
+
+        @Override
+        public InvokeDynamicEntry invokedynamic() {
+            if (indyEntry == null)
+                indyEntry = code.classReader.readEntry(pos + 1, InvokeDynamicEntry.class);
+            return indyEntry;
+        }
+
+        @Override
+        public void writeTo(DirectCodeBuilder writer) {
+            if (writer.canWriteDirect(code.constantPool()))
+                super.writeTo(writer);
+            else
+                writer.writeInvokeDynamic(invokedynamic());
+        }
+
+        @Override
+        public String toString() {
+            return String.format(FMT_InvokeDynamic, this.opcode(), bootstrapMethod(), bootstrapArgs());
+        }
+
+    }
+
+    public static final class BoundNewObjectInstruction
+            extends BoundInstruction implements NewObjectInstruction {
+        ClassEntry classEntry;
+
+        BoundNewObjectInstruction(CodeImpl code, int pos) {
+            super(Opcode.NEW, Opcode.NEW.sizeIfFixed(), code, pos);
+        }
+
+        @Override
+        public ClassEntry className() {
+            if (classEntry == null)
+                classEntry = code.classReader.readClassEntry(pos + 1);
+            return classEntry;
+        }
+
+        @Override
+        public void writeTo(DirectCodeBuilder writer) {
+            if (writer.canWriteDirect(code.constantPool()))
+                super.writeTo(writer);
+            else
+                writer.writeNewObject(className());
+        }
+
+        @Override
+        public String toString() {
+            return String.format(FMT_NewObj, this.opcode(), className().asInternalName());
+        }
+
+    }
+
+    public static final class BoundNewPrimitiveArrayInstruction
+            extends BoundInstruction implements NewPrimitiveArrayInstruction {
+
+        public BoundNewPrimitiveArrayInstruction(Opcode op, CodeImpl code, int pos) {
+            super(op, op.sizeIfFixed(), code, pos);
+        }
+
+        @Override
+        public TypeKind typeKind() {
+            return TypeKind.fromNewarrayCode(code.classReader.readU1(pos + 1));
+        }
+
+        @Override
+        public String toString() {
+            return String.format(FMT_NewPrimitiveArray, this.opcode(), typeKind());
+        }
+
+    }
+
+    public static final class BoundNewReferenceArrayInstruction
+            extends BoundInstruction implements NewReferenceArrayInstruction {
+
+        public BoundNewReferenceArrayInstruction(Opcode op, CodeImpl code, int pos) {
+            super(op, op.sizeIfFixed(), code, pos);
+        }
+
+        @Override
+        public ClassEntry componentType() {
+            return code.classReader.readClassEntry(pos + 1);
+        }
+
+        @Override
+        public void writeTo(DirectCodeBuilder writer) {
+            if (writer.canWriteDirect(code.constantPool()))
+                super.writeTo(writer);
+            else
+                writer.writeNewReferenceArray(componentType());
+        }
+
+        @Override
+        public String toString() {
+            return String.format(FMT_NewRefArray, this.opcode(), componentType().asInternalName());
+        }
+    }
+
+    public static final class BoundNewMultidimensionalArrayInstruction
+            extends BoundInstruction implements NewMultiArrayInstruction {
+
+        public BoundNewMultidimensionalArrayInstruction(Opcode op, CodeImpl code, int pos) {
+            super(op, op.sizeIfFixed(), code, pos);
+        }
+
+        @Override
+        public int dimensions() {
+            return code.classReader.readU1(pos + 3);
+        }
+
+        @Override
+        public ClassEntry arrayType() {
+            return code.classReader.readClassEntry(pos + 1);
+        }
+
+        @Override
+        public void writeTo(DirectCodeBuilder writer) {
+            if (writer.canWriteDirect(code.constantPool()))
+                super.writeTo(writer);
+            else
+                writer.writeNewMultidimensionalArray(dimensions(), arrayType());
+        }
+
+        @Override
+        public String toString() {
+            return String.format(FMT_NewMultiArray, this.opcode(), arrayType().asInternalName(), dimensions());
+        }
+
+    }
+
+    public static final class BoundTypeCheckInstruction
+            extends BoundInstruction implements TypeCheckInstruction {
+        ClassEntry typeEntry;
+
+        public BoundTypeCheckInstruction(Opcode op, CodeImpl code, int pos) {
+            super(op, op.sizeIfFixed(), code, pos);
+        }
+
+        @Override
+        public ClassEntry type() {
+            if (typeEntry == null)
+                typeEntry = code.classReader.readClassEntry(pos + 1);
+            return typeEntry;
+        }
+
+        @Override
+        public void writeTo(DirectCodeBuilder writer) {
+            if (writer.canWriteDirect(code.constantPool()))
+                super.writeTo(writer);
+            else
+                writer.writeTypeCheck(op, type());
+        }
+
+        @Override
+        public String toString() {
+            return String.format(FMT_TypeCheck, this.opcode(), type().asInternalName());
+        }
+
+    }
+
+    public static final class BoundArgumentConstantInstruction
+            extends BoundInstruction implements ConstantInstruction.ArgumentConstantInstruction {
+
+        public BoundArgumentConstantInstruction(Opcode op, CodeImpl code, int pos) {
+            super(op, op.sizeIfFixed(), code, pos);
+        }
+
+        @Override
+        public Integer constantValue() {
+            return constantInt();
+        }
+
+        public int constantInt() {
+            return size == 3 ? code.classReader.readS2(pos + 1) : code.classReader.readS1(pos + 1);
+        }
+
+        @Override
+        public String toString() {
+            return String.format(FMT_ArgumentConstant, this.opcode(), constantValue());
+        }
+
+    }
+
+    public static final class BoundLoadConstantInstruction
+            extends BoundInstruction implements ConstantInstruction.LoadConstantInstruction {
+
+        public BoundLoadConstantInstruction(Opcode op, CodeImpl code, int pos) {
+            super(op, op.sizeIfFixed(), code, pos);
+        }
+
+        @Override
+        public LoadableConstantEntry constantEntry() {
+            return code.classReader.entryByIndex(op == Opcode.LDC
+                                                  ? code.classReader.readU1(pos + 1)
+                                                  : code.classReader.readU2(pos + 1),
+                            LoadableConstantEntry.class);
+        }
+
+        @Override
+        public ConstantDesc constantValue() {
+            return constantEntry().constantValue();
+        }
+
+        @Override
+        public void writeTo(DirectCodeBuilder writer) {
+            if (writer.canWriteDirect(code.constantPool()))
+                super.writeTo(writer);
+            else
+                writer.writeLoadConstant(op, constantEntry());
+        }
+
+        @Override
+        public String toString() {
+            return String.format(FMT_LoadConstant, this.opcode(), constantValue());
+        }
+
+    }
+
+    public static final class BoundJsrInstruction
+            extends BoundInstruction implements DiscontinuedInstruction.JsrInstruction {
+
+        public BoundJsrInstruction(Opcode op, CodeImpl code, int pos) {
+            super(op, op.sizeIfFixed(), code, pos);
+        }
+
+        @Override
+        public Label target() {
+            return offsetToLabel(branchByteOffset());
+        }
+
+        public int branchByteOffset() {
+            return size == 3
+                   ? code.classReader.readS2(pos + 1)
+                   : code.classReader.readInt(pos + 1);
+        }
+
+        @Override
+        public void writeTo(DirectCodeBuilder writer) {
+            writer.writeBranch(opcode(), target());
+        }
+
+        @Override
+        public String toString() {
+            return String.format(FMT_Discontinued, this.opcode());
+        }
+
+    }
+
+    public static final class BoundRetInstruction
+            extends BoundInstruction implements DiscontinuedInstruction.RetInstruction {
+
+        public BoundRetInstruction(Opcode op, CodeImpl code, int pos) {
+            super(op, op.sizeIfFixed(), code, pos);
+        }
+
+        @Override
+        public String toString() {
+            return String.format(FMT_Discontinued, this.opcode());
+        }
+
+        @Override
+        public int slot() {
+            return switch (size) {
+                case 2 -> code.classReader.readU1(pos + 1);
+                case 4 -> code.classReader.readU2(pos + 2);
+                default -> throw new IllegalArgumentException("Unexpected op size: " + op.sizeIfFixed() + " -- " + op);
+            };
+        }
+
+    }
+
+    public abstract static sealed class UnboundInstruction extends AbstractInstruction {
+
+        UnboundInstruction(Opcode op) {
+            super(op, op.sizeIfFixed());
+        }
+
+        @Override
+        // Override this if there is anything more that just the bytecode
+        public void writeTo(DirectCodeBuilder writer) {
+            writer.writeBytecode(op);
+        }
+
+        @Override
+        public String toString() {
+            return String.format(FMT_Unbound, this.getClass().getSimpleName(), op);
+        }
+    }
+
+    public static final class UnboundLoadInstruction
+            extends UnboundInstruction implements LoadInstruction {
+        final int slot;
+
+        public UnboundLoadInstruction(Opcode op, int slot) {
+            super(op);
+            this.slot = slot;
+        }
+
+        @Override
+        public int slot() {
+            return slot;
+        }
+
+        @Override
+        public TypeKind typeKind() {
+            return op.primaryTypeKind();
+        }
+
+        @Override
+        public void writeTo(DirectCodeBuilder writer) {
+            writer.writeLocalVar(op, slot);
+        }
+
+        @Override
+        public String toString() {
+            return String.format(FMT_Load, this.opcode(), slot());
+        }
+
+    }
+
+    public static final class UnboundStoreInstruction
+            extends UnboundInstruction implements StoreInstruction {
+        final int slot;
+
+        public UnboundStoreInstruction(Opcode op, int slot) {
+            super(op);
+            this.slot = slot;
+        }
+
+        @Override
+        public int slot() {
+            return slot;
+        }
+
+        @Override
+        public TypeKind typeKind() {
+            return op.primaryTypeKind();
+        }
+
+        @Override
+        public void writeTo(DirectCodeBuilder writer) {
+            writer.writeLocalVar(op, slot);
+        }
+
+        @Override
+        public String toString() {
+            return String.format(FMT_Store, this.opcode(), slot());
+        }
+
+    }
+
+    public static final class UnboundIncrementInstruction
+            extends UnboundInstruction implements IncrementInstruction {
+        final int slot;
+        final int constant;
+
+        public UnboundIncrementInstruction(int slot, int constant) {
+            super(slot <= 255 && constant < 128 && constant > -127
+                  ? Opcode.IINC
+                  : Opcode.IINC_W);
+            this.slot = slot;
+            this.constant = constant;
+        }
+
+        @Override
+        public int slot() {
+            return slot;
+        }
+
+        @Override
+        public int constant() {
+            return constant;
+        }
+
+        @Override
+        public void writeTo(DirectCodeBuilder writer) {
+            writer.writeIncrement(slot, constant);
+        }
+
+        @Override
+        public String toString() {
+            return String.format(FMT_Increment, this.opcode(), slot(), constant());
+        }
+    }
+
+    public static final class UnboundBranchInstruction
+            extends UnboundInstruction implements BranchInstruction {
+        final Label target;
+
+        public UnboundBranchInstruction(Opcode op, Label target) {
+            super(op);
+            this.target = target;
+        }
+
+        @Override
+        public Label target() {
+            return target;
+        }
+
+        @Override
+        public void writeTo(DirectCodeBuilder writer) {
+            writer.writeBranch(op, target);
+        }
+
+        @Override
+        public String toString() {
+            return String.format(FMT_Branch, this.opcode());
+        }
+    }
+
+    public static final class UnboundLookupSwitchInstruction
+            extends UnboundInstruction implements LookupSwitchInstruction {
+
+        private final Label defaultTarget;
+        private final List<SwitchCase> cases;
+
+        public UnboundLookupSwitchInstruction(Label defaultTarget, List<SwitchCase> cases) {
+            super(Opcode.LOOKUPSWITCH);
+            this.defaultTarget = defaultTarget;
+            this.cases = List.copyOf(cases);
+        }
+
+        @Override
+        public List<SwitchCase> cases() {
+            return cases;
+        }
+
+        @Override
+        public Label defaultTarget() {
+            return defaultTarget;
+        }
+
+        @Override
+        public void writeTo(DirectCodeBuilder writer) {
+            writer.writeLookupSwitch(defaultTarget, cases);
+        }
+
+        @Override
+        public String toString() {
+            return String.format(FMT_LookupSwitch, this.opcode());
+        }
+    }
+
+    public static final class UnboundTableSwitchInstruction
+            extends UnboundInstruction implements TableSwitchInstruction {
+
+        private final int lowValue, highValue;
+        private final Label defaultTarget;
+        private final List<SwitchCase> cases;
+
+        public UnboundTableSwitchInstruction(int lowValue, int highValue, Label defaultTarget, List<SwitchCase> cases) {
+            super(Opcode.TABLESWITCH);
+            this.lowValue = lowValue;
+            this.highValue = highValue;
+            this.defaultTarget = defaultTarget;
+            this.cases = List.copyOf(cases);
+        }
+
+        @Override
+        public int lowValue() {
+            return lowValue;
+        }
+
+        @Override
+        public int highValue() {
+            return highValue;
+        }
+
+        @Override
+        public Label defaultTarget() {
+            return defaultTarget;
+        }
+
+        @Override
+        public List<SwitchCase> cases() {
+            return cases;
+        }
+
+        @Override
+        public void writeTo(DirectCodeBuilder writer) {
+            writer.writeTableSwitch(lowValue, highValue, defaultTarget, cases);
+        }
+
+        @Override
+        public String toString() {
+            return String.format(FMT_TableSwitch, this.opcode());
+        }
+    }
+
+    public static final class UnboundReturnInstruction
+            extends UnboundInstruction implements ReturnInstruction {
+
+        public UnboundReturnInstruction(Opcode op) {
+            super(op);
+        }
+
+        @Override
+        public TypeKind typeKind() {
+            return op.primaryTypeKind();
+        }
+
+        @Override
+        public String toString() {
+            return String.format(FMT_Return, this.opcode());
+        }
+
+    }
+
+    public static final class UnboundThrowInstruction
+            extends UnboundInstruction implements ThrowInstruction {
+
+        public UnboundThrowInstruction() {
+            super(Opcode.ATHROW);
+        }
+
+        @Override
+        public String toString() {
+            return String.format(FMT_Throw, this.opcode());
+        }
+
+    }
+
+    public static final class UnboundFieldInstruction
+            extends UnboundInstruction implements FieldInstruction {
+        final FieldRefEntry fieldEntry;
+
+        public UnboundFieldInstruction(Opcode op,
+                                       FieldRefEntry fieldEntry) {
+            super(op);
+            this.fieldEntry = fieldEntry;
+        }
+
+        @Override
+        public FieldRefEntry field() {
+            return fieldEntry;
+        }
+
+        @Override
+        public void writeTo(DirectCodeBuilder writer) {
+            writer.writeFieldAccess(op, fieldEntry);
+        }
+
+        @Override
+        public String toString() {
+            return String.format(FMT_Field, this.opcode(), this.owner().asInternalName(), this.name().stringValue(), this.type().stringValue());
+        }
+    }
+
+    public static final class UnboundInvokeInstruction
+            extends UnboundInstruction implements InvokeInstruction {
+        final MemberRefEntry methodEntry;
+
+        public UnboundInvokeInstruction(Opcode op, MemberRefEntry methodEntry) {
+            super(op);
+            this.methodEntry = methodEntry;
+        }
+
+        @Override
+        public MemberRefEntry method() {
+            return methodEntry;
+        }
+
+        @Override
+        public boolean isInterface() {
+            return op == Opcode.INVOKEINTERFACE || methodEntry instanceof InterfaceMethodRefEntry;
+        }
+
+        @Override
+        public int count() {
+            return op == Opcode.INVOKEINTERFACE
+                   ? Util.parameterSlots(Util.methodTypeSymbol(methodEntry.nameAndType())) + 1
+                   : 0;
+        }
+
+        @Override
+        public void writeTo(DirectCodeBuilder writer) {
+            if (op == Opcode.INVOKEINTERFACE)
+                writer.writeInvokeInterface(op, (InterfaceMethodRefEntry) method(), count());
+            else
+                writer.writeInvokeNormal(op, method());
+        }
+
+        @Override
+        public String toString() {
+            return String.format(FMT_Invoke, this.opcode(), owner().asInternalName(), name().stringValue(), type().stringValue());
+        }
+    }
+
+    public static final class UnboundInvokeDynamicInstruction
+            extends UnboundInstruction implements InvokeDynamicInstruction {
+        final InvokeDynamicEntry indyEntry;
+
+        public UnboundInvokeDynamicInstruction(InvokeDynamicEntry indyEntry) {
+            super(Opcode.INVOKEDYNAMIC);
+            this.indyEntry = indyEntry;
+        }
+
+        @Override
+        public InvokeDynamicEntry invokedynamic() {
+            return indyEntry;
+        }
+
+        @Override
+        public void writeTo(DirectCodeBuilder writer) {
+            writer.writeInvokeDynamic(invokedynamic());
+        }
+
+        @Override
+        public String toString() {
+            return String.format(FMT_InvokeDynamic, this.opcode(), bootstrapMethod(), bootstrapArgs());
+        }
+    }
+
+    public static final class UnboundNewObjectInstruction
+            extends UnboundInstruction implements NewObjectInstruction {
+        final ClassEntry classEntry;
+
+        public UnboundNewObjectInstruction(ClassEntry classEntry) {
+            super(Opcode.NEW);
+            this.classEntry = classEntry;
+        }
+
+        @Override
+        public ClassEntry className() {
+            return classEntry;
+        }
+
+        @Override
+        public void writeTo(DirectCodeBuilder writer) {
+            writer.writeNewObject(className());
+        }
+
+        @Override
+        public String toString() {
+            return String.format(FMT_NewObj, this.opcode(), className().asInternalName());
+        }
+    }
+
+    public static final class UnboundNewPrimitiveArrayInstruction
+            extends UnboundInstruction implements NewPrimitiveArrayInstruction {
+        final TypeKind typeKind;
+
+        public UnboundNewPrimitiveArrayInstruction(TypeKind typeKind) {
+            super(Opcode.NEWARRAY);
+            this.typeKind = typeKind;
+        }
+
+        @Override
+        public TypeKind typeKind() {
+            return typeKind;
+        }
+
+        @Override
+        public void writeTo(DirectCodeBuilder writer) {
+            writer.writeNewPrimitiveArray(typeKind.newarrayCode());
+        }
+
+        @Override
+        public String toString() {
+            return String.format(FMT_NewPrimitiveArray, this.opcode(), typeKind());
+        }
+    }
+
+    public static final class UnboundNewReferenceArrayInstruction
+            extends UnboundInstruction implements NewReferenceArrayInstruction {
+        final ClassEntry componentTypeEntry;
+
+        public UnboundNewReferenceArrayInstruction(ClassEntry componentTypeEntry) {
+            super(Opcode.ANEWARRAY);
+            this.componentTypeEntry = componentTypeEntry;
+        }
+
+        @Override
+        public ClassEntry componentType() {
+            return componentTypeEntry;
+        }
+
+        @Override
+        public void writeTo(DirectCodeBuilder writer) {
+            writer.writeNewReferenceArray(componentType());
+        }
+
+        @Override
+        public String toString() {
+            return String.format(FMT_NewRefArray, this.opcode(), componentType().asInternalName());
+        }
+    }
+
+    public static final class UnboundNewMultidimensionalArrayInstruction
+            extends UnboundInstruction implements NewMultiArrayInstruction {
+        final ClassEntry arrayTypeEntry;
+        final int dimensions;
+
+        public UnboundNewMultidimensionalArrayInstruction(ClassEntry arrayTypeEntry,
+                                                          int dimensions) {
+            super(Opcode.MULTIANEWARRAY);
+            this.arrayTypeEntry = arrayTypeEntry;
+            this.dimensions = dimensions;
+        }
+
+        @Override
+        public int dimensions() {
+            return dimensions;
+        }
+
+        @Override
+        public ClassEntry arrayType() {
+            return arrayTypeEntry;
+        }
+
+        @Override
+        public void writeTo(DirectCodeBuilder writer) {
+            writer.writeNewMultidimensionalArray(dimensions(), arrayType());
+        }
+
+        @Override
+        public String toString() {
+            return String.format(FMT_NewMultiArray, this.opcode(), arrayType().asInternalName(), dimensions());
+        }
+
+    }
+
+    public static final class UnboundArrayLoadInstruction
+            extends UnboundInstruction implements ArrayLoadInstruction {
+
+        public UnboundArrayLoadInstruction(Opcode op) {
+            super(op);
+        }
+
+        @Override
+        public TypeKind typeKind() {
+            return op.primaryTypeKind();
+        }
+    }
+
+    public static final class UnboundArrayStoreInstruction
+            extends UnboundInstruction implements ArrayStoreInstruction {
+
+        public UnboundArrayStoreInstruction(Opcode op) {
+            super(op);
+        }
+
+        @Override
+        public TypeKind typeKind() {
+            return op.primaryTypeKind();
+        }
+    }
+
+    public static final class UnboundTypeCheckInstruction
+            extends UnboundInstruction implements TypeCheckInstruction {
+        final ClassEntry typeEntry;
+
+        public UnboundTypeCheckInstruction(Opcode op, ClassEntry typeEntry) {
+            super(op);
+            this.typeEntry = typeEntry;
+        }
+
+        @Override
+        public ClassEntry type() {
+            return typeEntry;
+        }
+
+        @Override
+        public void writeTo(DirectCodeBuilder writer) {
+            writer.writeTypeCheck(op, type());
+        }
+
+        @Override
+        public String toString() {
+            return String.format(FMT_TypeCheck, this.opcode(), type().asInternalName());
+        }
+    }
+
+    public static final class UnboundStackInstruction
+            extends UnboundInstruction implements StackInstruction {
+
+        public UnboundStackInstruction(Opcode op) {
+            super(op);
+        }
+
+    }
+
+    public static final class UnboundConvertInstruction
+            extends UnboundInstruction implements ConvertInstruction {
+
+        public UnboundConvertInstruction(Opcode op) {
+            super(op);
+        }
+
+        @Override
+        public TypeKind fromType() {
+            return op.primaryTypeKind();
+        }
+
+        @Override
+        public TypeKind toType() {
+            return op.secondaryTypeKind();
+        }
+    }
+
+    public static final class UnboundOperatorInstruction
+            extends UnboundInstruction implements OperatorInstruction {
+
+        public UnboundOperatorInstruction(Opcode op) {
+            super(op);
+        }
+
+        @Override
+        public TypeKind typeKind() {
+            return op.primaryTypeKind();
+        }
+    }
+
+    public static final class UnboundIntrinsicConstantInstruction
+            extends UnboundInstruction implements ConstantInstruction.IntrinsicConstantInstruction {
+        final ConstantDesc constant;
+
+        public UnboundIntrinsicConstantInstruction(Opcode op) {
+            super(op);
+            constant = op.constantValue();
+        }
+
+        @Override
+        public void writeTo(DirectCodeBuilder writer) {
+            super.writeTo(writer);
+        }
+
+        @Override
+        public ConstantDesc constantValue() {
+            return constant;
+        }
+    }
+
+    public static final class UnboundArgumentConstantInstruction
+            extends UnboundInstruction implements ConstantInstruction.ArgumentConstantInstruction {
+        final int value;
+
+        public UnboundArgumentConstantInstruction(Opcode op, int value) {
+            super(op);
+            this.value = value;
+        }
+
+        @Override
+        public Integer constantValue() {
+            return value;
+        }
+
+        @Override
+        public void writeTo(DirectCodeBuilder writer) {
+            writer.writeArgumentConstant(op, value);
+        }
+
+        @Override
+        public String toString() {
+            return String.format(FMT_ArgumentConstant, this.opcode(), constantValue());
+        }
+    }
+
+    public static final class UnboundLoadConstantInstruction
+            extends UnboundInstruction implements ConstantInstruction.LoadConstantInstruction {
+        final LoadableConstantEntry constant;
+
+        public UnboundLoadConstantInstruction(Opcode op, LoadableConstantEntry constant) {
+            super(op);
+            this.constant = constant;
+        }
+
+        @Override
+        public LoadableConstantEntry constantEntry() {
+            return constant;
+        }
+
+        @Override
+        public ConstantDesc constantValue() {
+            return constant.constantValue();
+        }
+
+        @Override
+        public void writeTo(DirectCodeBuilder writer) {
+            writer.writeLoadConstant(op, constant);
+        }
+
+        @Override
+        public String toString() {
+            return String.format(FMT_LoadConstant, this.opcode(), constantValue());
+        }
+    }
+
+    public static final class UnboundMonitorInstruction
+            extends UnboundInstruction implements MonitorInstruction {
+
+        public UnboundMonitorInstruction(Opcode op) {
+            super(op);
+        }
+
+    }
+
+    public static final class UnboundNopInstruction
+            extends UnboundInstruction implements NopInstruction {
+
+        public UnboundNopInstruction() {
+            super(Opcode.NOP);
+        }
+
+    }
+
+    public static final class UnboundJsrInstruction
+            extends UnboundInstruction implements DiscontinuedInstruction.JsrInstruction {
+        final Label target;
+
+        public UnboundJsrInstruction(Opcode op, Label target) {
+            super(op);
+            this.target = target;
+        }
+
+        @Override
+        public Label target() {
+            return target;
+        }
+
+        @Override
+        public void writeTo(DirectCodeBuilder writer) {
+            writer.writeBranch(op, target);
+        }
+
+        @Override
+        public String toString() {
+            return String.format(FMT_Discontinued, this.opcode());
+        }
+    }
+
+    public static final class UnboundRetInstruction
+            extends UnboundInstruction implements DiscontinuedInstruction.RetInstruction {
+        final int slot;
+
+        public UnboundRetInstruction(Opcode op, int slot) {
+            super(op);
+            this.slot = slot;
+        }
+
+        @Override
+        public int slot() {
+            return slot;
+        }
+
+        @Override
+        public void writeTo(DirectCodeBuilder writer) {
+            writer.writeLocalVar(op, slot);
+        }
+
+        @Override
+        public String toString() {
+            return String.format(FMT_Discontinued, this.opcode());
+        }
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/classfile/impl/AbstractPoolEntry$AbstractDynamicConstantPoolEntry.class b/tests/test_data/std/jdk/internal/classfile/impl/AbstractPoolEntry$AbstractDynamicConstantPoolEntry.class
new file mode 100644
index 0000000000000000000000000000000000000000..9ca1d4c6356dd435cd8cf99366dc71e806e46014
GIT binary patch
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literal 0
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diff --git a/tests/test_data/std/jdk/internal/classfile/impl/AbstractPoolEntry$AbstractMemberRefEntry.class b/tests/test_data/std/jdk/internal/classfile/impl/AbstractPoolEntry$AbstractMemberRefEntry.class
new file mode 100644
index 0000000000000000000000000000000000000000..2eb935b9af9527c02425488d60b26e519af0ed3e
GIT binary patch
literal 3844
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diff --git a/tests/test_data/std/jdk/internal/classfile/impl/AbstractPoolEntry$AbstractNamedEntry.class b/tests/test_data/std/jdk/internal/classfile/impl/AbstractPoolEntry$AbstractNamedEntry.class
new file mode 100644
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literal 0
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diff --git a/tests/test_data/std/jdk/internal/classfile/impl/AbstractPoolEntry$AbstractRefEntry.class b/tests/test_data/std/jdk/internal/classfile/impl/AbstractPoolEntry$AbstractRefEntry.class
new file mode 100644
index 0000000000000000000000000000000000000000..61c5739e702e488b9971fe5b04fb1383b8087363
GIT binary patch
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diff --git a/tests/test_data/std/jdk/internal/classfile/impl/AbstractPoolEntry$AbstractRefsEntry.class b/tests/test_data/std/jdk/internal/classfile/impl/AbstractPoolEntry$AbstractRefsEntry.class
new file mode 100644
index 0000000000000000000000000000000000000000..5f32c6088376ed124ef98dce6ca5f938f3d20101
GIT binary patch
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diff --git a/tests/test_data/std/jdk/internal/classfile/impl/AbstractPoolEntry$ClassEntryImpl.class b/tests/test_data/std/jdk/internal/classfile/impl/AbstractPoolEntry$ClassEntryImpl.class
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index 0000000000000000000000000000000000000000..5aae4dc85574c3065cb7399fe3c03e00152fb550
GIT binary patch
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diff --git a/tests/test_data/std/jdk/internal/classfile/impl/AbstractPoolEntry$ConstantDynamicEntryImpl.class b/tests/test_data/std/jdk/internal/classfile/impl/AbstractPoolEntry$ConstantDynamicEntryImpl.class
new file mode 100644
index 0000000000000000000000000000000000000000..789a91f2b3f25d23a241d527c8d3c60d881819f4
GIT binary patch
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diff --git a/tests/test_data/std/jdk/internal/classfile/impl/AbstractPoolEntry$CpException.class b/tests/test_data/std/jdk/internal/classfile/impl/AbstractPoolEntry$CpException.class
new file mode 100644
index 0000000000000000000000000000000000000000..e279e5ce5e6334719bab7fd1f8fa5d99a646a582
GIT binary patch
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diff --git a/tests/test_data/std/jdk/internal/classfile/impl/AbstractPoolEntry$DoubleEntryImpl.class b/tests/test_data/std/jdk/internal/classfile/impl/AbstractPoolEntry$DoubleEntryImpl.class
new file mode 100644
index 0000000000000000000000000000000000000000..89fc4d4354dd59a8c4ccde31b8509c8dc1b8662b
GIT binary patch
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diff --git a/tests/test_data/std/jdk/internal/classfile/impl/AbstractPoolEntry$FieldRefEntryImpl.class b/tests/test_data/std/jdk/internal/classfile/impl/AbstractPoolEntry$FieldRefEntryImpl.class
new file mode 100644
index 0000000000000000000000000000000000000000..623724050f93826062049f17b0f3b3745a44773e
GIT binary patch
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diff --git a/tests/test_data/std/jdk/internal/classfile/impl/AbstractPoolEntry$FloatEntryImpl.class b/tests/test_data/std/jdk/internal/classfile/impl/AbstractPoolEntry$FloatEntryImpl.class
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index 0000000000000000000000000000000000000000..f62e7e393843977e969dccbd8b93efc846e6ae75
GIT binary patch
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diff --git a/tests/test_data/std/jdk/internal/classfile/impl/AbstractPoolEntry$IntegerEntryImpl.class b/tests/test_data/std/jdk/internal/classfile/impl/AbstractPoolEntry$IntegerEntryImpl.class
new file mode 100644
index 0000000000000000000000000000000000000000..67b0e26bab1f886d0490d44920cb34a1b0476074
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new file mode 100644
index 0000000000000000000000000000000000000000..1d01aa12b911d4cbfc0ccf10305d7749e29dd794
GIT binary patch
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diff --git a/tests/test_data/std/jdk/internal/classfile/impl/AbstractPoolEntry$InvokeDynamicEntryImpl.class b/tests/test_data/std/jdk/internal/classfile/impl/AbstractPoolEntry$InvokeDynamicEntryImpl.class
new file mode 100644
index 0000000000000000000000000000000000000000..5dd87de587743d188f2a328b3b5203014cc9ebc7
GIT binary patch
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diff --git a/tests/test_data/std/jdk/internal/classfile/impl/AbstractPoolEntry$LongEntryImpl.class b/tests/test_data/std/jdk/internal/classfile/impl/AbstractPoolEntry$LongEntryImpl.class
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new file mode 100644
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diff --git a/tests/test_data/std/jdk/internal/classfile/impl/AbstractPoolEntry$MethodRefEntryImpl.class b/tests/test_data/std/jdk/internal/classfile/impl/AbstractPoolEntry$MethodRefEntryImpl.class
new file mode 100644
index 0000000000000000000000000000000000000000..e0400d66249cda5dec0730a82fe1578dd8b6e7ba
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new file mode 100644
index 0000000000000000000000000000000000000000..dbeaa3620969a1cb6d8439da0f4f2328e7cebb12
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diff --git a/tests/test_data/std/jdk/internal/classfile/impl/AbstractPoolEntry$ModuleEntryImpl.class b/tests/test_data/std/jdk/internal/classfile/impl/AbstractPoolEntry$ModuleEntryImpl.class
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diff --git a/tests/test_data/std/jdk/internal/classfile/impl/AbstractPoolEntry$NameAndTypeEntryImpl.class b/tests/test_data/std/jdk/internal/classfile/impl/AbstractPoolEntry$NameAndTypeEntryImpl.class
new file mode 100644
index 0000000000000000000000000000000000000000..0d33546e0bc8d0049bcc9ba85a31245c9dc83f29
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diff --git a/tests/test_data/std/jdk/internal/classfile/impl/AbstractPoolEntry$PackageEntryImpl.class b/tests/test_data/std/jdk/internal/classfile/impl/AbstractPoolEntry$PackageEntryImpl.class
new file mode 100644
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diff --git a/tests/test_data/std/jdk/internal/classfile/impl/AbstractPoolEntry$PrimitiveEntry.class b/tests/test_data/std/jdk/internal/classfile/impl/AbstractPoolEntry$PrimitiveEntry.class
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diff --git a/tests/test_data/std/jdk/internal/classfile/impl/AbstractPoolEntry$StringEntryImpl.class b/tests/test_data/std/jdk/internal/classfile/impl/AbstractPoolEntry$StringEntryImpl.class
new file mode 100644
index 0000000000000000000000000000000000000000..ce238ef3f5f22d866886c58f99cb732fb4daeab8
GIT binary patch
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diff --git a/tests/test_data/std/jdk/internal/classfile/impl/AbstractPoolEntry$Utf8EntryImpl$State.class b/tests/test_data/std/jdk/internal/classfile/impl/AbstractPoolEntry$Utf8EntryImpl$State.class
new file mode 100644
index 0000000000000000000000000000000000000000..7e64a3cd8b8c90736e0cc817e62cbb35b7a3a3e8
GIT binary patch
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literal 0
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diff --git a/tests/test_data/std/jdk/internal/classfile/impl/AbstractPoolEntry$Utf8EntryImpl.class b/tests/test_data/std/jdk/internal/classfile/impl/AbstractPoolEntry$Utf8EntryImpl.class
new file mode 100644
index 0000000000000000000000000000000000000000..ef0d83e7be84084791f28a96edfc736269a02720
GIT binary patch
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literal 0
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diff --git a/tests/test_data/std/jdk/internal/classfile/impl/AbstractPoolEntry.class b/tests/test_data/std/jdk/internal/classfile/impl/AbstractPoolEntry.class
new file mode 100644
index 0000000000000000000000000000000000000000..c7307a9b4c80f99a1a5fa9b65d6ec673dc6c5725
GIT binary patch
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HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/classfile/impl/AbstractPoolEntry.java b/tests/test_data/std/jdk/internal/classfile/impl/AbstractPoolEntry.java
new file mode 100644
index 00000000..f846ca6f
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/classfile/impl/AbstractPoolEntry.java
@@ -0,0 +1,1201 @@
+/*
+ * Copyright (c) 2022, 2024, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package jdk.internal.classfile.impl;
+
+import java.lang.constant.*;
+import java.lang.invoke.TypeDescriptor;
+import java.nio.charset.StandardCharsets;
+import java.util.Arrays;
+
+import java.lang.classfile.ClassFile;
+import java.lang.classfile.constantpool.ClassEntry;
+import java.lang.classfile.constantpool.ConstantDynamicEntry;
+import java.lang.classfile.constantpool.ConstantPool;
+import java.lang.classfile.constantpool.ConstantPoolBuilder;
+import java.lang.classfile.BufWriter;
+import java.lang.classfile.constantpool.DoubleEntry;
+import java.lang.classfile.constantpool.FieldRefEntry;
+import java.lang.classfile.constantpool.FloatEntry;
+import java.lang.classfile.constantpool.IntegerEntry;
+import java.lang.classfile.constantpool.InterfaceMethodRefEntry;
+import java.lang.classfile.constantpool.InvokeDynamicEntry;
+import java.lang.classfile.constantpool.LongEntry;
+import java.lang.classfile.constantpool.MemberRefEntry;
+import java.lang.classfile.constantpool.MethodHandleEntry;
+import java.lang.classfile.constantpool.MethodRefEntry;
+import java.lang.classfile.constantpool.MethodTypeEntry;
+import java.lang.classfile.constantpool.ModuleEntry;
+import java.lang.classfile.constantpool.NameAndTypeEntry;
+import java.lang.classfile.constantpool.PackageEntry;
+import java.lang.classfile.constantpool.PoolEntry;
+import java.lang.classfile.constantpool.StringEntry;
+import java.lang.classfile.constantpool.Utf8Entry;
+import jdk.internal.access.JavaLangAccess;
+import jdk.internal.access.SharedSecrets;
+import jdk.internal.util.ArraysSupport;
+
+public abstract sealed class AbstractPoolEntry {
+    /*
+    Invariant: a {CP,BSM} entry for pool P refer only to {CP,BSM} entries
+    from P or P's parent.  This is enforced by the various xxxEntry methods
+    in SplitConstantPool.  As a result, code in this file can use writeU2
+    instead of writeIndex.
+
+    Cloning of entries may be a no-op if the entry is already on the right pool
+    (which implies that the referenced entries will also be on the right pool.)
+     */
+
+    private static final int TAG_SMEAR = 0x13C4B2D1;
+    static final int NON_ZERO = 0x40000000;
+
+    public static int hash1(int tag, int x1) {
+        return (tag * TAG_SMEAR + x1) | NON_ZERO;
+    }
+
+    public static int hash2(int tag, int x1, int x2) {
+        return (tag * TAG_SMEAR + x1 + 31 * x2) | NON_ZERO;
+    }
+
+    // Ensure that hash is never zero
+    public static int hashString(int stringHash) {
+        return stringHash | NON_ZERO;
+    }
+
+    public static Utf8Entry rawUtf8EntryFromStandardAttributeName(String name) {
+        //assuming standard attribute names are all US_ASCII
+        var raw = name.getBytes(StandardCharsets.US_ASCII);
+        return new Utf8EntryImpl(null, 0, raw, 0, raw.length);
+    }
+
+    @SuppressWarnings("unchecked")
+    public static <T extends PoolEntry> T maybeClone(ConstantPoolBuilder cp, T entry) {
+        return (T)((AbstractPoolEntry)entry).clone(cp);
+    }
+
+    final ConstantPool constantPool;
+    public final byte tag;
+    private final int index;
+    private final int hash;
+
+    private AbstractPoolEntry(ConstantPool constantPool, int tag, int index, int hash) {
+        this.tag = (byte) tag;
+        this.index = index;
+        this.hash = hash;
+        this.constantPool = constantPool;
+    }
+
+    public ConstantPool constantPool() { return constantPool; }
+
+    public int index() { return index; }
+
+    @Override
+    public int hashCode() {
+        return hash;
+    }
+
+    public byte tag() {
+        return tag;
+    }
+
+    public int width() {
+        return (tag == ClassFile.TAG_LONG || tag == ClassFile.TAG_DOUBLE) ? 2 : 1;
+    }
+
+    abstract PoolEntry clone(ConstantPoolBuilder cp);
+
+    public static final class Utf8EntryImpl extends AbstractPoolEntry implements Utf8Entry {
+        // Processing UTF8 from the constant pool is one of the more expensive
+        // operations, and often, we don't actually need access to the constant
+        // as a string.  So there are multiple layers of laziness in UTF8
+        // constants.  In the first stage, all we do is record the range of
+        // bytes in the classfile.  If the size or hashCode is needed, then we
+        // process the raw bytes into a byte[] or char[], but do not inflate
+        // a String.  If a string is needed, it too is inflated lazily.
+        // If we construct a Utf8Entry from a string, we generate the encoding
+        // at write time.
+
+        enum State { RAW, BYTE, CHAR, STRING }
+
+        private static final JavaLangAccess JLA = SharedSecrets.getJavaLangAccess();
+
+        private State state;
+        private final byte[] rawBytes; // null if initialized directly from a string
+        private final int offset;
+        private final int rawLen;
+        // Set in any state other than RAW
+        private int hash;
+        private int charLen;
+        // Set in CHAR state
+        private char[] chars;
+        // Only set in STRING state
+        private String stringValue;
+
+        Utf8EntryImpl(ConstantPool cpm, int index,
+                          byte[] rawBytes, int offset, int rawLen) {
+            super(cpm, ClassFile.TAG_UTF8, index, 0);
+            this.rawBytes = rawBytes;
+            this.offset = offset;
+            this.rawLen = rawLen;
+            this.state = State.RAW;
+        }
+
+        Utf8EntryImpl(ConstantPool cpm, int index, String s) {
+            this(cpm, index, s, hashString(s.hashCode()));
+        }
+
+        Utf8EntryImpl(ConstantPool cpm, int index, String s, int hash) {
+            super(cpm, ClassFile.TAG_UTF8, index, 0);
+            this.rawBytes = null;
+            this.offset = 0;
+            this.rawLen = 0;
+            this.state = State.STRING;
+            this.stringValue = s;
+            this.charLen = s.length();
+            this.hash = hash;
+        }
+
+        Utf8EntryImpl(ConstantPool cpm, int index, Utf8EntryImpl u) {
+            super(cpm, ClassFile.TAG_UTF8, index, 0);
+            this.rawBytes = u.rawBytes;
+            this.offset = u.offset;
+            this.rawLen = u.rawLen;
+            this.state = u.state;
+            this.hash = u.hash;
+            this.charLen = u.charLen;
+            this.chars = u.chars;
+            this.stringValue = u.stringValue;
+        }
+
+        /**
+         * {@jvms 4.4.7} String content is encoded in modified UTF-8.
+         *
+         * Modified UTF-8 strings are encoded so that code point sequences that
+         * contain only non-null ASCII characters can be represented using only 1
+         * byte per code point, but all code points in the Unicode codespace can be
+         * represented.
+         *
+         * Modified UTF-8 strings are not null-terminated.
+         *
+         * Code points in the range '\u0001' to '\u007F' are represented by a single
+         * byte.
+         *
+         * The null code point ('\u0000') and code points in the range '\u0080' to
+         * '\u07FF' are represented by a pair of bytes.
+         *
+         * Code points in the range '\u0800' to '\uFFFF' are represented by 3 bytes.
+         *
+         * Characters with code points above U+FFFF (so-called supplementary
+         * characters) are represented by separately encoding the two surrogate code
+         * units of their UTF-16 representation. Each of the surrogate code units is
+         * represented by three bytes. This means supplementary characters are
+         * represented by six bytes.
+         *
+         * The bytes of multibyte characters are stored in the class file in
+         * big-endian (high byte first) order.
+         *
+         * There are two differences between this format and the "standard" UTF-8
+         * format. First, the null character (char)0 is encoded using the 2-byte
+         * format rather than the 1-byte format, so that modified UTF-8 strings
+         * never have embedded nulls. Second, only the 1-byte, 2-byte, and 3-byte
+         * formats of standard UTF-8 are used. The Java Virtual Machine does not
+         * recognize the four-byte format of standard UTF-8; it uses its own
+         * two-times-three-byte format instead.
+         */
+        private void inflate() {
+            int singleBytes = JLA.countPositives(rawBytes, offset, rawLen);
+            int hash = ArraysSupport.hashCodeOfUnsigned(rawBytes, offset, singleBytes, 0);
+            if (singleBytes == rawLen) {
+                this.hash = hashString(hash);
+                charLen = rawLen;
+                state = State.BYTE;
+            }
+            else {
+                char[] chararr = new char[rawLen];
+                int chararr_count = singleBytes;
+                // Inflate prefix of bytes to characters
+                JLA.inflateBytesToChars(rawBytes, offset, chararr, 0, singleBytes);
+
+                int px = offset + singleBytes;
+                int utfend = offset + rawLen;
+                while (px < utfend) {
+                    int c = (int) rawBytes[px] & 0xff;
+                    switch (c >> 4) {
+                        case 0, 1, 2, 3, 4, 5, 6, 7: {
+                            // 0xxx xxxx
+                            px++;
+                            chararr[chararr_count++] = (char) c;
+                            hash = 31 * hash + c;
+                            break;
+                        }
+                        case 12, 13: {
+                            // 110x xxxx  10xx xxxx
+                            px += 2;
+                            if (px > utfend) {
+                                throw new CpException("malformed input: partial character at end");
+                            }
+                            int char2 = rawBytes[px - 1];
+                            if ((char2 & 0xC0) != 0x80) {
+                                throw new CpException("malformed input around byte " + px);
+                            }
+                            char v = (char) (((c & 0x1F) << 6) | (char2 & 0x3F));
+                            chararr[chararr_count++] = v;
+                            hash = 31 * hash + v;
+                            break;
+                        }
+                        case 14: {
+                            // 1110 xxxx  10xx xxxx  10xx xxxx
+                            px += 3;
+                            if (px > utfend) {
+                                throw new CpException("malformed input: partial character at end");
+                            }
+                            int char2 = rawBytes[px - 2];
+                            int char3 = rawBytes[px - 1];
+                            if (((char2 & 0xC0) != 0x80) || ((char3 & 0xC0) != 0x80)) {
+                                throw new CpException("malformed input around byte " + (px - 1));
+                            }
+                            char v = (char) (((c & 0x0F) << 12) | ((char2 & 0x3F) << 6) | (char3 & 0x3F));
+                            chararr[chararr_count++] = v;
+                            hash = 31 * hash + v;
+                            break;
+                        }
+                        default:
+                            // 10xx xxxx,  1111 xxxx
+                            throw new CpException("malformed input around byte " + px);
+                    }
+                }
+                this.hash = hashString(hash);
+                charLen = chararr_count;
+                this.chars = chararr;
+                state = State.CHAR;
+            }
+
+        }
+
+        @Override
+        public Utf8EntryImpl clone(ConstantPoolBuilder cp) {
+            if (cp.canWriteDirect(constantPool))
+                return this;
+            return (state == State.STRING && rawBytes == null)
+                   ? (Utf8EntryImpl) cp.utf8Entry(stringValue)
+                   : ((SplitConstantPool) cp).maybeCloneUtf8Entry(this);
+        }
+
+        @Override
+        public int hashCode() {
+            if (state == State.RAW)
+                inflate();
+            return hash;
+        }
+
+        @Override
+        public String toString() {
+            if (state == State.RAW)
+                inflate();
+            if (state != State.STRING) {
+                stringValue = (chars != null)
+                              ? new String(chars, 0, charLen)
+                              : new String(rawBytes, offset, charLen, StandardCharsets.ISO_8859_1);
+                state = State.STRING;
+            }
+            return stringValue;
+        }
+
+        @Override
+        public String stringValue() {
+            return toString();
+        }
+
+        @Override
+        public ConstantDesc constantValue() {
+            return stringValue();
+        }
+
+        @Override
+        public int length() {
+            if (state == State.RAW)
+                inflate();
+            return charLen;
+        }
+
+        @Override
+        public char charAt(int index) {
+            if (state == State.STRING)
+                return stringValue.charAt(index);
+            if (state == State.RAW)
+                inflate();
+            return (chars != null)
+                   ? chars[index]
+                   : (char) rawBytes[index + offset];
+        }
+
+        @Override
+        public CharSequence subSequence(int start, int end) {
+            return toString().subSequence(start, end);
+        }
+
+        @Override
+        public boolean equals(Object o) {
+            if (o == this) return true;
+            if (o instanceof Utf8EntryImpl u) {
+                return equalsUtf8(u);
+            }
+            return false;
+        }
+
+        public boolean equalsUtf8(Utf8EntryImpl u) {
+            if (hashCode() != u.hashCode()
+                || length() != u.length())
+                return false;
+            if (rawBytes != null && u.rawBytes != null)
+                return Arrays.equals(rawBytes, offset, offset + rawLen,
+                                     u.rawBytes, u.offset, u.offset + u.rawLen);
+            else if ((state == State.STRING && u.state == State.STRING))
+                return stringValue.equals(u.stringValue);
+            else
+                return stringValue().equals(u.stringValue());
+        }
+
+        @Override
+        public boolean equalsString(String s) {
+            if (state == State.RAW)
+                inflate();
+            switch (state) {
+                case STRING:
+                    return stringValue.equals(s);
+                case CHAR:
+                    if (charLen != s.length() || hash != hashString(s.hashCode()))
+                        return false;
+                    for (int i=0; i<charLen; i++)
+                        if (chars[i] != s.charAt(i))
+                            return false;
+                    stringValue = s;
+                    state = State.STRING;
+                    return true;
+                case BYTE:
+                    if (rawLen != s.length() || hash != hashString(s.hashCode()))
+                        return false;
+                    for (int i=0; i<rawLen; i++)
+                        if (rawBytes[offset+i] != s.charAt(i))
+                            return false;
+                    stringValue = s;
+                    state = State.STRING;
+                    return true;
+            }
+            throw new IllegalStateException("cannot reach here");
+        }
+
+        @Override
+        public void writeTo(BufWriter pool) {
+            if (rawBytes != null) {
+                pool.writeU1(tag);
+                pool.writeU2(rawLen);
+                pool.writeBytes(rawBytes, offset, rawLen);
+            }
+            else {
+                // state == STRING and no raw bytes
+                if (stringValue.length() > 65535) {
+                    throw new IllegalArgumentException("string too long");
+                }
+                pool.writeU1(tag);
+                pool.writeU2(charLen);
+                for (int i = 0; i < charLen; ++i) {
+                    char c = stringValue.charAt(i);
+                    if (c >= '\001' && c <= '\177') {
+                        // Optimistic writing -- hope everything is bytes
+                        // If not, we bail out, and alternate path patches the length
+                        pool.writeU1((byte) c);
+                    }
+                    else {
+                        int charLength = stringValue.length();
+                        int byteLength = i;
+                        char c1;
+                        for (int j = i; j < charLength; ++j) {
+                            c1 = (stringValue).charAt(j);
+                            if (c1 >= '\001' && c1 <= '\177') {
+                                byteLength++;
+                            } else if (c1 > '\u07FF') {
+                                byteLength += 3;
+                            } else {
+                                byteLength += 2;
+                            }
+                        }
+                        if (byteLength > 65535) {
+                            throw new IllegalArgumentException();
+                        }
+                        int byteLengthFinal = byteLength;
+                        pool.patchInt(pool.size() - i - 2, 2, byteLengthFinal);
+                        for (int j = i; j < charLength; ++j) {
+                            c1 = (stringValue).charAt(j);
+                            if (c1 >= '\001' && c1 <= '\177') {
+                                pool.writeU1((byte) c1);
+                            } else if (c1 > '\u07FF') {
+                                pool.writeU1((byte) (0xE0 | c1 >> 12 & 0xF));
+                                pool.writeU1((byte) (0x80 | c1 >> 6 & 0x3F));
+                                pool.writeU1((byte) (0x80 | c1 & 0x3F));
+                            } else {
+                                pool.writeU1((byte) (0xC0 | c1 >> 6 & 0x1F));
+                                pool.writeU1((byte) (0x80 | c1 & 0x3F));
+                            }
+                        }
+                        break;
+                    }
+                }
+            }
+        }
+    }
+
+    abstract static sealed class AbstractRefEntry<T extends PoolEntry> extends AbstractPoolEntry {
+        protected final T ref1;
+
+        public AbstractRefEntry(ConstantPool constantPool, int tag, int index, T ref1) {
+            super(constantPool, tag, index, hash1(tag, ref1.index()));
+            this.ref1 = ref1;
+        }
+
+        public T ref1() {
+            return ref1;
+        }
+
+        public void writeTo(BufWriter pool) {
+            pool.writeU1(tag);
+            pool.writeU2(ref1.index());
+        }
+
+        @Override
+        public String toString() {
+            return tag() + " " + ref1();
+        }
+    }
+
+    abstract static sealed class AbstractRefsEntry<T extends PoolEntry, U extends PoolEntry>
+            extends AbstractPoolEntry {
+        protected final T ref1;
+        protected final U ref2;
+
+        public AbstractRefsEntry(ConstantPool constantPool, int tag, int index, T ref1, U ref2) {
+            super(constantPool, tag, index, hash2(tag, ref1.index(), ref2.index()));
+            this.ref1 = ref1;
+            this.ref2 = ref2;
+        }
+
+        public T ref1() {
+            return ref1;
+        }
+
+        public U ref2() {
+            return ref2;
+        }
+
+        public void writeTo(BufWriter pool) {
+            pool.writeU1(tag);
+            pool.writeU2(ref1.index());
+            pool.writeU2(ref2.index());
+        }
+
+        @Override
+        public String toString() {
+            return tag() + " " + ref1 + "-" + ref2;
+        }
+    }
+
+    abstract static sealed class AbstractNamedEntry extends AbstractRefEntry<Utf8EntryImpl> {
+
+        public AbstractNamedEntry(ConstantPool constantPool, int tag, int index, Utf8EntryImpl ref1) {
+            super(constantPool, tag, index, ref1);
+        }
+
+        public Utf8Entry name() {
+            return ref1;
+        }
+
+        public String asInternalName() {
+            return ref1.stringValue();
+        }
+
+        @Override
+        public boolean equals(Object o) {
+            if (o == this) { return true; }
+            if (o instanceof AbstractNamedEntry ne) {
+                return tag == ne.tag() && name().equals(ref1());
+            }
+            return false;
+        }
+    }
+
+    public static final class ClassEntryImpl extends AbstractNamedEntry implements ClassEntry {
+
+        public ClassDesc sym = null;
+
+        ClassEntryImpl(ConstantPool cpm, int index, Utf8EntryImpl name) {
+            super(cpm, ClassFile.TAG_CLASS, index, name);
+        }
+
+        @Override
+        public ClassEntry clone(ConstantPoolBuilder cp) {
+            if (cp.canWriteDirect(constantPool)) {
+                return this;
+            } else {
+                ClassEntryImpl ret = (ClassEntryImpl)cp.classEntry(ref1);
+                ret.sym = sym;
+                return ret;
+            }
+        }
+
+        @Override
+        public ClassDesc asSymbol() {
+            var sym = this.sym;
+            if (sym != null) {
+                return sym;
+            }
+            return this.sym = Util.toClassDesc(asInternalName());
+        }
+
+        @Override
+        public boolean equals(Object o) {
+            if (o == this) return true;
+            if (o instanceof ClassEntryImpl cce) {
+                return cce.name().equals(this.name());
+            } else if (o instanceof ClassEntry c) {
+                return c.asSymbol().equals(this.asSymbol());
+            }
+            return false;
+        }
+    }
+
+    public static final class PackageEntryImpl extends AbstractNamedEntry implements PackageEntry {
+
+        PackageEntryImpl(ConstantPool cpm, int index, Utf8EntryImpl name) {
+            super(cpm, ClassFile.TAG_PACKAGE, index, name);
+        }
+
+        @Override
+        public PackageEntry clone(ConstantPoolBuilder cp) {
+            return cp.canWriteDirect(constantPool) ? this : cp.packageEntry(ref1);
+        }
+
+        @Override
+        public PackageDesc asSymbol() {
+            return PackageDesc.ofInternalName(asInternalName());
+        }
+
+        @Override
+        public boolean equals(Object o) {
+            if (o == this) return true;
+            if (o instanceof PackageEntry p) {
+                return name().equals(p.name());
+            }
+            return false;
+        }
+    }
+
+    public static final class ModuleEntryImpl extends AbstractNamedEntry implements ModuleEntry {
+
+        ModuleEntryImpl(ConstantPool cpm, int index, Utf8EntryImpl name) {
+            super(cpm, ClassFile.TAG_MODULE, index, name);
+        }
+
+        @Override
+        public ModuleEntry clone(ConstantPoolBuilder cp) {
+            return cp.canWriteDirect(constantPool) ? this : cp.moduleEntry(ref1);
+        }
+
+        @Override
+        public ModuleDesc asSymbol() {
+            return ModuleDesc.of(asInternalName());
+        }
+
+        @Override
+        public boolean equals(Object o) {
+            if (o == this) return true;
+            if (o instanceof ModuleEntryImpl m) {
+                return name().equals(m.name());
+            }
+            return false;
+        }
+    }
+
+    public static final class NameAndTypeEntryImpl extends AbstractRefsEntry<Utf8EntryImpl, Utf8EntryImpl>
+            implements NameAndTypeEntry {
+
+        public TypeDescriptor typeSym = null;
+
+        NameAndTypeEntryImpl(ConstantPool cpm, int index, Utf8EntryImpl name, Utf8EntryImpl type) {
+            super(cpm, ClassFile.TAG_NAMEANDTYPE, index, name, type);
+        }
+
+        @Override
+        public Utf8Entry name() {
+            return ref1;
+        }
+
+        @Override
+        public Utf8Entry type() {
+            return ref2;
+        }
+
+        public ClassDesc fieldTypeSymbol() {
+            if (typeSym instanceof ClassDesc cd) {
+                return cd;
+            } else {
+                return (ClassDesc)(typeSym = ClassDesc.ofDescriptor(ref2.stringValue()));
+            }
+        }
+
+        public MethodTypeDesc methodTypeSymbol() {
+            if (typeSym instanceof MethodTypeDesc mtd) {
+                return mtd;
+            } else {
+                return (MethodTypeDesc)(typeSym = MethodTypeDesc.ofDescriptor(ref2.stringValue()));
+            }
+        }
+
+        @Override
+        public NameAndTypeEntry clone(ConstantPoolBuilder cp) {
+            if (cp.canWriteDirect(constantPool)) {
+                return this;
+            } else {
+                var ret = (NameAndTypeEntryImpl)cp.nameAndTypeEntry(ref1, ref2);
+                ret.typeSym = typeSym;
+                return ret;
+            }
+        }
+
+        @Override
+        public boolean equals(Object o) {
+            if (o == this) return true;
+            if (o instanceof NameAndTypeEntryImpl nat) {
+                return name().equals(nat.name()) && type().equals(nat.type());
+            }
+            return false;
+        }
+    }
+
+    public abstract static sealed class AbstractMemberRefEntry
+            extends AbstractRefsEntry<ClassEntryImpl, NameAndTypeEntryImpl>
+            implements MemberRefEntry {
+
+        AbstractMemberRefEntry(ConstantPool cpm, int tag, int index, ClassEntryImpl owner,
+                       NameAndTypeEntryImpl nameAndType) {
+            super(cpm, tag, index, owner, nameAndType);
+        }
+
+        @Override
+        public ClassEntryImpl owner() {
+            return ref1;
+        }
+
+        @Override
+        public NameAndTypeEntryImpl nameAndType() {
+            return ref2;
+        }
+
+        @Override
+        public String toString() {
+            return tag() + " " + owner().asInternalName() + "." + nameAndType().name().stringValue()
+                   + "-" + nameAndType().type().stringValue();
+        }
+
+        @Override
+        public boolean equals(Object o) {
+            if (this == o) return true;
+            if (o instanceof AbstractMemberRefEntry m) {
+                return tag == m.tag()
+                && owner().equals(m.owner())
+                && nameAndType().equals(m.nameAndType());
+            }
+            return false;
+        }
+    }
+
+    public static final class FieldRefEntryImpl extends AbstractMemberRefEntry implements FieldRefEntry {
+
+        FieldRefEntryImpl(ConstantPool cpm, int index,
+                              ClassEntryImpl owner, NameAndTypeEntryImpl nameAndType) {
+            super(cpm, ClassFile.TAG_FIELDREF, index, owner, nameAndType);
+        }
+
+        @Override
+        public FieldRefEntry clone(ConstantPoolBuilder cp) {
+            return cp.canWriteDirect(constantPool) ? this : cp.fieldRefEntry(ref1, ref2);
+        }
+    }
+
+    public static final class MethodRefEntryImpl extends AbstractMemberRefEntry implements MethodRefEntry {
+
+        MethodRefEntryImpl(ConstantPool cpm, int index,
+                               ClassEntryImpl owner, NameAndTypeEntryImpl nameAndType) {
+            super(cpm, ClassFile.TAG_METHODREF, index, owner, nameAndType);
+        }
+
+        @Override
+        public MethodRefEntry clone(ConstantPoolBuilder cp) {
+            return cp.canWriteDirect(constantPool) ? this : cp.methodRefEntry(ref1, ref2);
+        }
+    }
+
+    public static final class InterfaceMethodRefEntryImpl extends AbstractMemberRefEntry implements InterfaceMethodRefEntry {
+
+        InterfaceMethodRefEntryImpl(ConstantPool cpm, int index, ClassEntryImpl owner,
+                                        NameAndTypeEntryImpl nameAndType) {
+            super(cpm, ClassFile.TAG_INTERFACEMETHODREF, index, owner, nameAndType);
+        }
+
+        @Override
+        public InterfaceMethodRefEntry clone(ConstantPoolBuilder cp) {
+            return cp.canWriteDirect(constantPool) ? this : cp.interfaceMethodRefEntry(ref1, ref2);
+        }
+    }
+
+    public abstract static sealed class AbstractDynamicConstantPoolEntry extends AbstractPoolEntry {
+
+        private final int bsmIndex;
+        private BootstrapMethodEntryImpl bootstrapMethod;
+        private final NameAndTypeEntryImpl nameAndType;
+
+        AbstractDynamicConstantPoolEntry(ConstantPool cpm, int tag, int index, int hash, BootstrapMethodEntryImpl bootstrapMethod,
+                                         NameAndTypeEntryImpl nameAndType) {
+            super(cpm, tag, index, hash);
+            this.bsmIndex = bootstrapMethod.bsmIndex();
+            this.bootstrapMethod = bootstrapMethod;
+            this.nameAndType = nameAndType;
+        }
+
+        AbstractDynamicConstantPoolEntry(ConstantPool cpm, int tag, int index, int hash, int bsmIndex,
+                                         NameAndTypeEntryImpl nameAndType) {
+            super(cpm, tag, index, hash);
+            this.bsmIndex = bsmIndex;
+            this.bootstrapMethod = null;
+            this.nameAndType = nameAndType;
+        }
+
+        /**
+         * @return the bootstrapMethod
+         */
+        public BootstrapMethodEntryImpl bootstrap() {
+            if (bootstrapMethod == null) {
+                bootstrapMethod = (BootstrapMethodEntryImpl) constantPool.bootstrapMethodEntry(bsmIndex);
+            }
+            return bootstrapMethod;
+        }
+
+        /**
+         * @return the bsmIndex
+         */
+        public int bootstrapMethodIndex() {
+            return bsmIndex;
+        }
+
+        /**
+         * @return the nameAndType
+         */
+        public NameAndTypeEntryImpl nameAndType() {
+            return nameAndType;
+        }
+
+        public void writeTo(BufWriter pool) {
+            pool.writeU1(tag);
+            pool.writeU2(bsmIndex);
+            pool.writeU2(nameAndType.index());
+        }
+
+        @Override
+        public String toString() {
+            return tag() + " " + bootstrap() + "." + nameAndType().name().stringValue()
+                   + "-" + nameAndType().type().stringValue();
+        }
+
+        @Override
+        public boolean equals(Object o) {
+            if (this == o) return true;
+            if (o instanceof AbstractDynamicConstantPoolEntry d) {
+                return this.tag() == d.tag()
+                && bootstrap().equals(d.bootstrap())
+                && nameAndType.equals(d.nameAndType());
+            }
+            return false;
+        }
+    }
+
+    public static final class InvokeDynamicEntryImpl
+            extends AbstractDynamicConstantPoolEntry
+            implements InvokeDynamicEntry {
+
+        InvokeDynamicEntryImpl(ConstantPool cpm, int index, int hash, BootstrapMethodEntryImpl bootstrapMethod,
+                                   NameAndTypeEntryImpl nameAndType) {
+            super(cpm, ClassFile.TAG_INVOKEDYNAMIC, index, hash, bootstrapMethod, nameAndType);
+        }
+
+        InvokeDynamicEntryImpl(ConstantPool cpm, int index, int bsmIndex,
+                                   NameAndTypeEntryImpl nameAndType) {
+            super(cpm, ClassFile.TAG_INVOKEDYNAMIC, index, hash2(ClassFile.TAG_INVOKEDYNAMIC, bsmIndex, nameAndType.index()),
+                  bsmIndex, nameAndType);
+        }
+
+        @Override
+        public InvokeDynamicEntry clone(ConstantPoolBuilder cp) {
+            return cp.canWriteDirect(constantPool) ? this : cp.invokeDynamicEntry(bootstrap(), nameAndType());
+        }
+    }
+
+    public static final class ConstantDynamicEntryImpl extends AbstractDynamicConstantPoolEntry
+            implements ConstantDynamicEntry {
+
+        ConstantDynamicEntryImpl(ConstantPool cpm, int index, int hash, BootstrapMethodEntryImpl bootstrapMethod,
+                                     NameAndTypeEntryImpl nameAndType) {
+            super(cpm, ClassFile.TAG_CONSTANTDYNAMIC, index, hash, bootstrapMethod, nameAndType);
+        }
+
+        ConstantDynamicEntryImpl(ConstantPool cpm, int index, int bsmIndex,
+                                     NameAndTypeEntryImpl nameAndType) {
+            super(cpm, ClassFile.TAG_CONSTANTDYNAMIC, index, hash2(ClassFile.TAG_CONSTANTDYNAMIC, bsmIndex, nameAndType.index()),
+                  bsmIndex, nameAndType);
+        }
+
+        @Override
+        public ConstantDynamicEntry clone(ConstantPoolBuilder cp) {
+            return cp.canWriteDirect(constantPool) ? this : cp.constantDynamicEntry(bootstrap(), nameAndType());
+        }
+    }
+
+    public static final class MethodHandleEntryImpl extends AbstractPoolEntry
+            implements MethodHandleEntry {
+
+        private final int refKind;
+        private final AbstractPoolEntry.AbstractMemberRefEntry reference;
+
+        MethodHandleEntryImpl(ConstantPool cpm, int index, int hash, int refKind, AbstractPoolEntry.AbstractMemberRefEntry
+                reference) {
+            super(cpm, ClassFile.TAG_METHODHANDLE, index, hash);
+            this.refKind = refKind;
+            this.reference = reference;
+        }
+
+        MethodHandleEntryImpl(ConstantPool cpm, int index, int refKind, AbstractPoolEntry.AbstractMemberRefEntry
+                reference) {
+            super(cpm, ClassFile.TAG_METHODHANDLE, index, hash2(ClassFile.TAG_METHODHANDLE, refKind, reference.index()));
+            this.refKind = refKind;
+            this.reference = reference;
+        }
+
+        @Override
+        public int kind() {
+            return refKind;
+        }
+
+        @Override
+        public AbstractPoolEntry.AbstractMemberRefEntry reference() {
+            return reference;
+        }
+
+        @Override
+        public DirectMethodHandleDesc asSymbol() {
+            return MethodHandleDesc.of(
+                    DirectMethodHandleDesc.Kind.valueOf(kind(), reference() instanceof InterfaceMethodRefEntry),
+                    ((MemberRefEntry) reference()).owner().asSymbol(),
+                    ((MemberRefEntry) reference()).nameAndType().name().stringValue(),
+                    ((MemberRefEntry) reference()).nameAndType().type().stringValue());
+        }
+
+        @Override
+        public void writeTo(BufWriter pool) {
+            pool.writeU1(tag);
+            pool.writeU1(refKind);
+            pool.writeU2(reference.index());
+        }
+
+        @Override
+        public MethodHandleEntry clone(ConstantPoolBuilder cp) {
+            return cp.canWriteDirect(constantPool) ? this : cp.methodHandleEntry(refKind, reference);
+        }
+
+        @Override
+        public String toString() {
+            return tag() + " " + kind() + ":" + ((MemberRefEntry) reference()).owner().asInternalName() + "." + ((MemberRefEntry) reference()).nameAndType().name().stringValue()
+                   + "-" + ((MemberRefEntry) reference()).nameAndType().type().stringValue();
+        }
+
+        @Override
+        public boolean equals(Object o) {
+            if (this == o) return true;
+            if (o instanceof MethodHandleEntryImpl m) {
+                return kind() == m.kind()
+                && reference.equals(m.reference());
+            }
+            return false;
+        }
+    }
+
+    public static final class MethodTypeEntryImpl
+            extends AbstractRefEntry<Utf8EntryImpl>
+            implements MethodTypeEntry {
+
+        public MethodTypeDesc sym = null;
+
+        MethodTypeEntryImpl(ConstantPool cpm, int index, Utf8EntryImpl descriptor) {
+            super(cpm, ClassFile.TAG_METHODTYPE, index, descriptor);
+        }
+
+        @Override
+        public Utf8Entry descriptor() {
+            return ref1;
+        }
+
+        @Override
+        public MethodTypeEntry clone(ConstantPoolBuilder cp) {
+            if (cp.canWriteDirect(constantPool)) {
+                return this;
+            } else {
+                var ret = (MethodTypeEntryImpl)cp.methodTypeEntry(ref1);
+                ret.sym = sym;
+                return ret;
+            }
+        }
+
+        @Override
+        public MethodTypeDesc asSymbol() {
+            var sym = this.sym;
+            if (sym != null) {
+                return sym;
+            }
+            return this.sym = MethodTypeDesc.ofDescriptor(descriptor().stringValue());
+        }
+
+        @Override
+        public boolean equals(Object o) {
+            if (o == this) return true;
+            if (o instanceof MethodTypeEntryImpl m) {
+                return descriptor().equals(m.descriptor());
+            }
+            return false;
+        }
+    }
+
+    public static final class StringEntryImpl
+            extends AbstractRefEntry<Utf8EntryImpl>
+            implements StringEntry {
+
+        StringEntryImpl(ConstantPool cpm, int index, Utf8EntryImpl utf8) {
+            super(cpm, ClassFile.TAG_STRING, index, utf8);
+        }
+
+        @Override
+        public Utf8EntryImpl utf8() {
+            return ref1;
+        }
+
+        @Override
+        public String stringValue() {
+            return ref1.toString();
+        }
+
+        @Override
+        public ConstantDesc constantValue() {
+            return stringValue();
+        }
+
+        @Override
+        public StringEntry clone(ConstantPoolBuilder cp) {
+            return cp.canWriteDirect(constantPool) ? this : cp.stringEntry(ref1);
+        }
+
+        @Override
+        public String toString() {
+            return tag() + " \"" + stringValue() + "\"";
+        }
+
+        @Override
+        public boolean equals(Object o) {
+            if (o == this) return true;
+            if (o instanceof StringEntryImpl s) {
+                // check utf8 rather allocating a string
+                return utf8().equals(s.utf8());
+            }
+            return false;
+        }
+
+
+    }
+
+    abstract static sealed class PrimitiveEntry<T extends ConstantDesc>
+            extends AbstractPoolEntry {
+        protected final T val;
+
+        public PrimitiveEntry(ConstantPool constantPool, int tag, int index, T val) {
+            super(constantPool, tag, index, hash1(tag, val.hashCode()));
+            this.val = val;
+        }
+
+        public T value() {
+            return val;
+        }
+
+        public ConstantDesc constantValue() {
+            return value();
+        }
+
+        @Override
+        public String toString() {
+            return "" + tag() + value();
+        }
+    }
+
+    public static final class IntegerEntryImpl extends PrimitiveEntry<Integer>
+            implements IntegerEntry {
+
+        IntegerEntryImpl(ConstantPool cpm, int index, int i) {
+            super(cpm, ClassFile.TAG_INTEGER, index, i);
+        }
+
+        @Override
+        public void writeTo(BufWriter pool) {
+            pool.writeU1(tag);
+            pool.writeInt(val);
+        }
+
+        @Override
+        public IntegerEntry clone(ConstantPoolBuilder cp) {
+            return cp.canWriteDirect(constantPool) ? this : cp.intEntry(val);
+        }
+
+        @Override
+        public int intValue() {
+            return value();
+        }
+
+        @Override
+        public boolean equals(Object o) {
+            if (this == o) return true;
+            if (o instanceof IntegerEntryImpl e) {
+                return intValue() == e.intValue();
+            }
+            return false;
+        }
+    }
+
+    public static final class FloatEntryImpl extends PrimitiveEntry<Float>
+            implements FloatEntry {
+
+        FloatEntryImpl(ConstantPool cpm, int index, float f) {
+            super(cpm, ClassFile.TAG_FLOAT, index, f);
+        }
+
+        @Override
+        public void writeTo(BufWriter pool) {
+            pool.writeU1(tag);
+            pool.writeFloat(val);
+        }
+
+        @Override
+        public FloatEntry clone(ConstantPoolBuilder cp) {
+            return cp.canWriteDirect(constantPool) ? this : cp.floatEntry(val);
+        }
+
+        @Override
+        public float floatValue() {
+            return value();
+        }
+
+        @Override
+        public boolean equals(Object o) {
+            if (this == o) return true;
+            if (o instanceof FloatEntryImpl e) {
+                return floatValue() == e.floatValue();
+            }
+            return false;
+        }
+    }
+
+    public static final class LongEntryImpl extends PrimitiveEntry<Long> implements LongEntry {
+
+        LongEntryImpl(ConstantPool cpm, int index, long l) {
+            super(cpm, ClassFile.TAG_LONG, index, l);
+        }
+
+        @Override
+        public void writeTo(BufWriter pool) {
+            pool.writeU1(tag);
+            pool.writeLong(val);
+        }
+
+        @Override
+        public LongEntry clone(ConstantPoolBuilder cp) {
+            return cp.canWriteDirect(constantPool) ? this : cp.longEntry(val);
+        }
+
+        @Override
+        public long longValue() {
+            return value();
+        }
+
+        @Override
+        public boolean equals(Object o) {
+            if (this == o) return true;
+            if (o instanceof LongEntryImpl e) {
+                return longValue() == e.longValue();
+            }
+            return false;
+        }
+    }
+
+    public static final class DoubleEntryImpl extends PrimitiveEntry<Double> implements DoubleEntry {
+
+        DoubleEntryImpl(ConstantPool cpm, int index, double d) {
+            super(cpm, ClassFile.TAG_DOUBLE, index, d);
+        }
+
+        @Override
+        public void writeTo(BufWriter pool) {
+            pool.writeU1(tag);
+            pool.writeDouble(val);
+        }
+
+        @Override
+        public DoubleEntry clone(ConstantPoolBuilder cp) {
+            return cp.canWriteDirect(constantPool) ? this : cp.doubleEntry(val);
+        }
+
+        @Override
+        public double doubleValue() {
+            return value();
+        }
+
+        @Override
+        public boolean equals(Object o) {
+            if (this == o) return true;
+            if (o instanceof DoubleEntryImpl e) {
+                return doubleValue() == e.doubleValue();
+            }
+            return false;
+        }
+    }
+
+    static class CpException extends RuntimeException {
+        static final long serialVersionUID = 32L;
+
+        CpException(String s) {
+            super(s);
+        }
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/classfile/impl/AbstractPseudoInstruction$AbstractLocalPseudo.class b/tests/test_data/std/jdk/internal/classfile/impl/AbstractPseudoInstruction$AbstractLocalPseudo.class
new file mode 100644
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diff --git a/tests/test_data/std/jdk/internal/classfile/impl/AbstractPseudoInstruction$ExceptionCatchImpl.class b/tests/test_data/std/jdk/internal/classfile/impl/AbstractPseudoInstruction$ExceptionCatchImpl.class
new file mode 100644
index 0000000000000000000000000000000000000000..f556ffc5f010773569d2669cca8f7e22204d2185
GIT binary patch
literal 3091
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/classfile/impl/AbstractPseudoInstruction$UnboundCharacterRange.class b/tests/test_data/std/jdk/internal/classfile/impl/AbstractPseudoInstruction$UnboundCharacterRange.class
new file mode 100644
index 0000000000000000000000000000000000000000..e3b20fef90e991d6634c1a0da60112db06c3a325
GIT binary patch
literal 1603
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/classfile/impl/AbstractPseudoInstruction$UnboundLocalVariable.class b/tests/test_data/std/jdk/internal/classfile/impl/AbstractPseudoInstruction$UnboundLocalVariable.class
new file mode 100644
index 0000000000000000000000000000000000000000..8a464d8cffa0a5229812e95bac5adb9048237b0f
GIT binary patch
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/classfile/impl/AbstractPseudoInstruction$UnboundLocalVariableType.class b/tests/test_data/std/jdk/internal/classfile/impl/AbstractPseudoInstruction$UnboundLocalVariableType.class
new file mode 100644
index 0000000000000000000000000000000000000000..08684ee7d3f2318aa72d102239d645c484d916b4
GIT binary patch
literal 2521
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HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/classfile/impl/AbstractPseudoInstruction.class b/tests/test_data/std/jdk/internal/classfile/impl/AbstractPseudoInstruction.class
new file mode 100644
index 0000000000000000000000000000000000000000..904b0201b1d8e3ffaf7206f58c5146220df2b91a
GIT binary patch
literal 1149
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/classfile/impl/AbstractPseudoInstruction.java b/tests/test_data/std/jdk/internal/classfile/impl/AbstractPseudoInstruction.java
new file mode 100644
index 00000000..ffc36037
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/classfile/impl/AbstractPseudoInstruction.java
@@ -0,0 +1,260 @@
+/*
+ * Copyright (c) 2022, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package jdk.internal.classfile.impl;
+
+import java.util.Optional;
+
+import java.lang.classfile.BufWriter;
+import java.lang.classfile.constantpool.ClassEntry;
+import java.lang.classfile.constantpool.Utf8Entry;
+import java.lang.classfile.instruction.CharacterRange;
+import java.lang.classfile.instruction.ExceptionCatch;
+import java.lang.classfile.instruction.LocalVariable;
+import java.lang.classfile.instruction.LocalVariableType;
+import java.lang.classfile.Label;
+import java.lang.classfile.PseudoInstruction;
+
+public abstract sealed class AbstractPseudoInstruction
+        extends AbstractElement
+        implements PseudoInstruction {
+
+    @Override
+    public abstract void writeTo(DirectCodeBuilder writer);
+
+    public static final class ExceptionCatchImpl
+            extends AbstractPseudoInstruction
+            implements ExceptionCatch {
+
+        public final ClassEntry catchTypeEntry;
+        public final Label handler;
+        public final Label tryStart;
+        public final Label tryEnd;
+
+        public ExceptionCatchImpl(Label handler, Label tryStart, Label tryEnd,
+                                  ClassEntry catchTypeEntry) {
+            this.catchTypeEntry = catchTypeEntry;
+            this.handler = handler;
+            this.tryStart = tryStart;
+            this.tryEnd = tryEnd;
+        }
+
+        public ExceptionCatchImpl(Label handler, Label tryStart, Label tryEnd,
+                                  Optional<ClassEntry> catchTypeEntry) {
+            this.catchTypeEntry = catchTypeEntry.orElse(null);
+            this.handler = handler;
+            this.tryStart = tryStart;
+            this.tryEnd = tryEnd;
+        }
+
+        @Override
+        public Label tryStart() {
+            return tryStart;
+        }
+
+        @Override
+        public Label handler() {
+            return handler;
+        }
+
+        @Override
+        public Label tryEnd() {
+            return tryEnd;
+        }
+
+        @Override
+        public Optional<ClassEntry> catchType() {
+            return Optional.ofNullable(catchTypeEntry);
+        }
+
+        ClassEntry catchTypeEntry() {
+            return catchTypeEntry;
+        }
+
+        @Override
+        public void writeTo(DirectCodeBuilder writer) {
+            writer.addHandler(this);
+        }
+
+        @Override
+        public String toString() {
+            return String.format("ExceptionCatch[catchType=%s]", catchTypeEntry == null ? "<any>" : catchTypeEntry.name().stringValue());
+        }
+    }
+
+    public static final class UnboundCharacterRange
+            extends AbstractPseudoInstruction
+            implements CharacterRange {
+
+        public final Label startScope;
+        public final Label endScope;
+        public final int characterRangeStart;
+        public final int characterRangeEnd;
+        public final int flags;
+
+        public UnboundCharacterRange(Label startScope, Label endScope, int characterRangeStart,
+                                     int characterRangeEnd, int flags) {
+            this.startScope = startScope;
+            this.endScope = endScope;
+            this.characterRangeStart = characterRangeStart;
+            this.characterRangeEnd = characterRangeEnd;
+            this.flags = flags;
+        }
+
+        @Override
+        public Label startScope() {
+            return startScope;
+        }
+
+        @Override
+        public Label endScope() {
+            return endScope;
+        }
+
+        @Override
+        public int characterRangeStart() {
+            return characterRangeStart;
+        }
+
+        @Override
+        public int characterRangeEnd() {
+            return characterRangeEnd;
+        }
+
+        @Override
+        public int flags() {
+            return flags;
+        }
+
+        @Override
+        public void writeTo(DirectCodeBuilder writer) {
+            writer.addCharacterRange(this);
+        }
+
+    }
+
+    private abstract static sealed class AbstractLocalPseudo extends AbstractPseudoInstruction {
+        protected final int slot;
+        protected final Utf8Entry name;
+        protected final Utf8Entry descriptor;
+        protected final Label startScope;
+        protected final Label endScope;
+
+        public AbstractLocalPseudo(int slot, Utf8Entry name, Utf8Entry descriptor, Label startScope, Label endScope) {
+            this.slot = slot;
+            this.name = name;
+            this.descriptor = descriptor;
+            this.startScope = startScope;
+            this.endScope = endScope;
+        }
+
+        public int slot() {
+            return slot;
+        }
+
+        public Utf8Entry name() {
+            return name;
+        }
+
+        public String nameString() {
+            return name.stringValue();
+        }
+
+        public Label startScope() {
+            return startScope;
+        }
+
+        public Label endScope() {
+            return endScope;
+        }
+
+        public boolean writeTo(BufWriter b) {
+            var lc = ((BufWriterImpl)b).labelContext();
+            int startBci = lc.labelToBci(startScope());
+            int endBci = lc.labelToBci(endScope());
+            if (startBci == -1 || endBci == -1) {
+                return false;
+            }
+            int length = endBci - startBci;
+            b.writeU2(startBci);
+            b.writeU2(length);
+            b.writeIndex(name);
+            b.writeIndex(descriptor);
+            b.writeU2(slot());
+            return true;
+        }
+    }
+
+    public static final class UnboundLocalVariable extends AbstractLocalPseudo
+            implements LocalVariable {
+
+        public UnboundLocalVariable(int slot, Utf8Entry name, Utf8Entry descriptor, Label startScope, Label endScope) {
+            super(slot, name, descriptor, startScope, endScope);
+        }
+
+        @Override
+        public Utf8Entry type() {
+            return descriptor;
+        }
+
+        @Override
+        public void writeTo(DirectCodeBuilder writer) {
+            writer.addLocalVariable(this);
+        }
+
+        @Override
+        public String toString() {
+            return "LocalVariable[Slot=" + slot()
+                   + ", name=" + nameString()
+                   + ", descriptor='" + type().stringValue()
+                   + "']";
+        }
+    }
+
+    public static final class UnboundLocalVariableType extends AbstractLocalPseudo
+            implements LocalVariableType {
+
+        public UnboundLocalVariableType(int slot, Utf8Entry name, Utf8Entry signature, Label startScope, Label endScope) {
+            super(slot, name, signature, startScope, endScope);
+        }
+
+        @Override
+        public Utf8Entry signature() {
+            return descriptor;
+        }
+
+        @Override
+        public void writeTo(DirectCodeBuilder writer) {
+            writer.addLocalVariableType(this);
+        }
+
+        @Override
+        public String toString() {
+            return "LocalVariableType[Slot=" + slot()
+                   + ", name=" + nameString()
+                   + ", signature='" + signature().stringValue()
+                   + "']";
+        }
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/classfile/impl/AbstractUnboundModel.class b/tests/test_data/std/jdk/internal/classfile/impl/AbstractUnboundModel.class
new file mode 100644
index 0000000000000000000000000000000000000000..d699314cf7ee97099186bdb76484d753d0f94f1f
GIT binary patch
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HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/classfile/impl/AbstractUnboundModel.java b/tests/test_data/std/jdk/internal/classfile/impl/AbstractUnboundModel.java
new file mode 100644
index 00000000..6aa046eb
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/classfile/impl/AbstractUnboundModel.java
@@ -0,0 +1,71 @@
+/*
+ * Copyright (c) 2022, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package jdk.internal.classfile.impl;
+
+import java.util.List;
+import java.util.function.Consumer;
+import java.util.stream.Stream;
+
+import java.lang.classfile.Attribute;
+import java.lang.classfile.AttributedElement;
+import java.lang.classfile.ClassFileElement;
+import java.lang.classfile.CompoundElement;
+
+public abstract sealed class AbstractUnboundModel<E extends ClassFileElement>
+        extends AbstractElement
+        implements CompoundElement<E>, AttributedElement
+        permits BufferedCodeBuilder.Model, BufferedFieldBuilder.Model, BufferedMethodBuilder.Model {
+    private final List<E> elements;
+    private List<Attribute<?>> attributes;
+
+    public AbstractUnboundModel(List<E> elements) {
+        this.elements = elements;
+    }
+
+    @Override
+    public void forEachElement(Consumer<E> consumer) {
+        elements.forEach(consumer);
+    }
+
+    @Override
+    public Stream<E> elementStream() {
+        return elements.stream();
+    }
+
+    @Override
+    public List<E> elementList() {
+        return elements;
+    }
+
+    @Override
+    public List<Attribute<?>> attributes() {
+        if (attributes == null)
+            attributes = elements.stream()
+                                 .filter(e -> e instanceof Attribute)
+                                 .<Attribute<?>>map(e -> (Attribute<?>) e)
+                                 .toList();
+        return attributes;
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/classfile/impl/AccessFlagsImpl.class b/tests/test_data/std/jdk/internal/classfile/impl/AccessFlagsImpl.class
new file mode 100644
index 0000000000000000000000000000000000000000..ebf44ce1bd866f5b47f78a97ab379f4f7ae96e7c
GIT binary patch
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HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/classfile/impl/AccessFlagsImpl.java b/tests/test_data/std/jdk/internal/classfile/impl/AccessFlagsImpl.java
new file mode 100644
index 00000000..537110d2
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/classfile/impl/AccessFlagsImpl.java
@@ -0,0 +1,90 @@
+/*
+ * Copyright (c) 2022, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package jdk.internal.classfile.impl;
+
+import java.util.Set;
+import java.lang.classfile.AccessFlags;
+import java.lang.reflect.AccessFlag;
+
+public final class AccessFlagsImpl extends AbstractElement
+        implements AccessFlags {
+
+    private final AccessFlag.Location location;
+    private final int flagsMask;
+    private Set<AccessFlag> flags;
+
+    public  AccessFlagsImpl(AccessFlag.Location location, AccessFlag... flags) {
+        this.location = location;
+        this.flagsMask = Util.flagsToBits(location, flags);
+        this.flags = Set.of(flags);
+    }
+
+    public AccessFlagsImpl(AccessFlag.Location location, int mask) {
+        this.location = location;
+        this.flagsMask = mask;
+    }
+
+    @Override
+    public int flagsMask() {
+        return flagsMask;
+    }
+
+    @Override
+    public Set<AccessFlag> flags() {
+        if (flags == null)
+            flags = AccessFlag.maskToAccessFlags(flagsMask, location);
+        return flags;
+    }
+
+    @Override
+    public void writeTo(DirectClassBuilder builder) {
+        builder.setFlags(flagsMask);
+    }
+
+    @Override
+    public void writeTo(DirectMethodBuilder builder) {
+        builder.setFlags(flagsMask);
+    }
+
+    @Override
+    public void writeTo(DirectFieldBuilder builder) {
+        builder.setFlags(flagsMask);
+    }
+
+    @Override
+    public AccessFlag.Location location() {
+        return location;
+    }
+
+    @Override
+    public boolean has(AccessFlag flag) {
+        return Util.has(location, flagsMask, flag);
+    }
+
+    @Override
+    public String toString() {
+        return String.format("AccessFlags[flags=%d]", flagsMask);
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/classfile/impl/AnnotationImpl$AnnotationElementImpl.class b/tests/test_data/std/jdk/internal/classfile/impl/AnnotationImpl$AnnotationElementImpl.class
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/classfile/impl/AnnotationImpl$OfAnnotationImpl.class b/tests/test_data/std/jdk/internal/classfile/impl/AnnotationImpl$OfAnnotationImpl.class
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literal 0
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diff --git a/tests/test_data/std/jdk/internal/classfile/impl/AnnotationImpl$OfArrayImpl.class b/tests/test_data/std/jdk/internal/classfile/impl/AnnotationImpl$OfArrayImpl.class
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diff --git a/tests/test_data/std/jdk/internal/classfile/impl/AnnotationImpl$OfBooleanImpl.class b/tests/test_data/std/jdk/internal/classfile/impl/AnnotationImpl$OfBooleanImpl.class
new file mode 100644
index 0000000000000000000000000000000000000000..33b0b72c27691dd46ac73dea71c8a352712591e4
GIT binary patch
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literal 0
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diff --git a/tests/test_data/std/jdk/internal/classfile/impl/AnnotationImpl$OfByteImpl.class b/tests/test_data/std/jdk/internal/classfile/impl/AnnotationImpl$OfByteImpl.class
new file mode 100644
index 0000000000000000000000000000000000000000..ec08bb620f4f4e5758515aeda10dca690422713a
GIT binary patch
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literal 0
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diff --git a/tests/test_data/std/jdk/internal/classfile/impl/AnnotationImpl$OfCharacterImpl.class b/tests/test_data/std/jdk/internal/classfile/impl/AnnotationImpl$OfCharacterImpl.class
new file mode 100644
index 0000000000000000000000000000000000000000..702e5264567bcd70b8216080788facdd7f0ccc51
GIT binary patch
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literal 0
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diff --git a/tests/test_data/std/jdk/internal/classfile/impl/AnnotationImpl$OfClassImpl.class b/tests/test_data/std/jdk/internal/classfile/impl/AnnotationImpl$OfClassImpl.class
new file mode 100644
index 0000000000000000000000000000000000000000..8d980844c6c5e4d021d23c43ac0ce55cbff55191
GIT binary patch
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diff --git a/tests/test_data/std/jdk/internal/classfile/impl/AnnotationImpl$OfConstantImpl.class b/tests/test_data/std/jdk/internal/classfile/impl/AnnotationImpl$OfConstantImpl.class
new file mode 100644
index 0000000000000000000000000000000000000000..2dcbde85f0387c1279c3d7122de6d2476c3b829d
GIT binary patch
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diff --git a/tests/test_data/std/jdk/internal/classfile/impl/AnnotationImpl$OfDoubleImpl.class b/tests/test_data/std/jdk/internal/classfile/impl/AnnotationImpl$OfDoubleImpl.class
new file mode 100644
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GIT binary patch
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diff --git a/tests/test_data/std/jdk/internal/classfile/impl/AnnotationImpl$OfEnumImpl.class b/tests/test_data/std/jdk/internal/classfile/impl/AnnotationImpl$OfEnumImpl.class
new file mode 100644
index 0000000000000000000000000000000000000000..2855064f52066455f98917bcd99f48bf5303f8cd
GIT binary patch
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diff --git a/tests/test_data/std/jdk/internal/classfile/impl/AnnotationImpl$OfFloatImpl.class b/tests/test_data/std/jdk/internal/classfile/impl/AnnotationImpl$OfFloatImpl.class
new file mode 100644
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diff --git a/tests/test_data/std/jdk/internal/classfile/impl/AnnotationImpl$OfIntegerImpl.class b/tests/test_data/std/jdk/internal/classfile/impl/AnnotationImpl$OfIntegerImpl.class
new file mode 100644
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diff --git a/tests/test_data/std/jdk/internal/classfile/impl/AnnotationImpl$OfLongImpl.class b/tests/test_data/std/jdk/internal/classfile/impl/AnnotationImpl$OfLongImpl.class
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diff --git a/tests/test_data/std/jdk/internal/classfile/impl/AnnotationImpl$OfShortImpl.class b/tests/test_data/std/jdk/internal/classfile/impl/AnnotationImpl$OfShortImpl.class
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diff --git a/tests/test_data/std/jdk/internal/classfile/impl/AnnotationImpl$OfStringImpl.class b/tests/test_data/std/jdk/internal/classfile/impl/AnnotationImpl$OfStringImpl.class
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diff --git a/tests/test_data/std/jdk/internal/classfile/impl/AnnotationImpl.class b/tests/test_data/std/jdk/internal/classfile/impl/AnnotationImpl.class
new file mode 100644
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HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/classfile/impl/AnnotationImpl.java b/tests/test_data/std/jdk/internal/classfile/impl/AnnotationImpl.java
new file mode 100644
index 00000000..4fc2d5cf
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/classfile/impl/AnnotationImpl.java
@@ -0,0 +1,304 @@
+/*
+ * Copyright (c) 2022, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package jdk.internal.classfile.impl;
+
+import java.lang.classfile.*;
+import java.lang.classfile.constantpool.*;
+
+import java.lang.constant.ConstantDesc;
+import java.util.List;
+
+import static java.lang.classfile.ClassFile.*;
+
+public final class AnnotationImpl implements Annotation {
+    private final Utf8Entry className;
+    private final List<AnnotationElement> elements;
+
+    public AnnotationImpl(Utf8Entry className,
+                          List<AnnotationElement> elems) {
+        this.className = className;
+        this.elements = List.copyOf(elems);
+    }
+
+    @Override
+    public Utf8Entry className() {
+        return className;
+    }
+
+    @Override
+    public List<AnnotationElement> elements() {
+        return elements;
+    }
+
+    @Override
+    public void writeTo(BufWriter buf) {
+        buf.writeIndex(className());
+        buf.writeList(elements());
+    }
+
+    @Override
+    public String toString() {
+        StringBuilder sb = new StringBuilder("Annotation[");
+        sb.append(className().stringValue());
+        List<AnnotationElement> evps = elements();
+        if (!evps.isEmpty())
+            sb.append(" [");
+        for (AnnotationElement evp : evps) {
+            sb.append(evp.name().stringValue())
+                    .append("=")
+                    .append(evp.value().toString())
+                    .append(", ");
+        }
+        if (!evps.isEmpty()) {
+            sb.delete(sb.length()-1, sb.length());
+            sb.append("]");
+        }
+        sb.append("]");
+        return sb.toString();
+    }
+
+    public record AnnotationElementImpl(Utf8Entry name,
+                                        AnnotationValue value)
+            implements AnnotationElement {
+
+        @Override
+        public void writeTo(BufWriter buf) {
+            buf.writeIndex(name());
+            value().writeTo(buf);
+        }
+    }
+
+    public sealed interface OfConstantImpl extends AnnotationValue.OfConstant
+            permits AnnotationImpl.OfStringImpl, AnnotationImpl.OfDoubleImpl,
+                    AnnotationImpl.OfFloatImpl, AnnotationImpl.OfLongImpl,
+                    AnnotationImpl.OfIntegerImpl, AnnotationImpl.OfShortImpl,
+                    AnnotationImpl.OfCharacterImpl, AnnotationImpl.OfByteImpl,
+                    AnnotationImpl.OfBooleanImpl {
+
+        @Override
+        default void writeTo(BufWriter buf) {
+            buf.writeU1(tag());
+            buf.writeIndex(constant());
+        }
+
+        @Override
+        default ConstantDesc constantValue() {
+            return constant().constantValue();
+        }
+
+    }
+
+    public record OfStringImpl(Utf8Entry constant)
+            implements AnnotationImpl.OfConstantImpl, AnnotationValue.OfString {
+
+        @Override
+        public char tag() {
+            return AEV_STRING;
+        }
+
+        @Override
+        public String stringValue() {
+            return constant().stringValue();
+        }
+    }
+
+    public record OfDoubleImpl(DoubleEntry constant)
+            implements AnnotationImpl.OfConstantImpl, AnnotationValue.OfDouble {
+
+        @Override
+        public char tag() {
+            return AEV_DOUBLE;
+        }
+
+        @Override
+        public double doubleValue() {
+            return constant().doubleValue();
+        }
+    }
+
+    public record OfFloatImpl(FloatEntry constant)
+            implements AnnotationImpl.OfConstantImpl, AnnotationValue.OfFloat {
+
+        @Override
+        public char tag() {
+            return AEV_FLOAT;
+        }
+
+        @Override
+        public float floatValue() {
+            return constant().floatValue();
+        }
+    }
+
+    public record OfLongImpl(LongEntry constant)
+            implements AnnotationImpl.OfConstantImpl, AnnotationValue.OfLong {
+
+        @Override
+        public char tag() {
+            return AEV_LONG;
+        }
+
+        @Override
+        public long longValue() {
+            return constant().longValue();
+        }
+    }
+
+    public record OfIntegerImpl(IntegerEntry constant)
+            implements AnnotationImpl.OfConstantImpl, AnnotationValue.OfInteger {
+
+        @Override
+        public char tag() {
+            return AEV_INT;
+        }
+
+        @Override
+        public int intValue() {
+            return constant().intValue();
+        }
+    }
+
+    public record OfShortImpl(IntegerEntry constant)
+            implements AnnotationImpl.OfConstantImpl, AnnotationValue.OfShort {
+
+        @Override
+        public char tag() {
+            return AEV_SHORT;
+        }
+
+        @Override
+        public short shortValue() {
+            return (short)constant().intValue();
+        }
+    }
+
+    public record OfCharacterImpl(IntegerEntry constant)
+            implements AnnotationImpl.OfConstantImpl, AnnotationValue.OfCharacter {
+
+        @Override
+        public char tag() {
+            return AEV_CHAR;
+        }
+
+        @Override
+        public char charValue() {
+            return (char)constant().intValue();
+        }
+    }
+
+    public record OfByteImpl(IntegerEntry constant)
+            implements AnnotationImpl.OfConstantImpl, AnnotationValue.OfByte {
+
+        @Override
+        public char tag() {
+            return AEV_BYTE;
+        }
+
+        @Override
+        public byte byteValue() {
+            return (byte)constant().intValue();
+        }
+    }
+
+    public record OfBooleanImpl(IntegerEntry constant)
+            implements AnnotationImpl.OfConstantImpl, AnnotationValue.OfBoolean {
+
+        @Override
+        public char tag() {
+            return AEV_BOOLEAN;
+        }
+
+        @Override
+        public boolean booleanValue() {
+            return constant().intValue() == 1;
+        }
+    }
+
+    public record OfArrayImpl(List<AnnotationValue> values)
+            implements AnnotationValue.OfArray {
+
+        public OfArrayImpl(List<AnnotationValue> values) {
+            this.values = List.copyOf(values);
+        }
+
+        @Override
+        public char tag() {
+            return AEV_ARRAY;
+        }
+
+        @Override
+        public void writeTo(BufWriter buf) {
+            buf.writeU1(tag());
+            buf.writeList(values);
+        }
+
+    }
+
+    public record OfEnumImpl(Utf8Entry className, Utf8Entry constantName)
+            implements AnnotationValue.OfEnum {
+        @Override
+        public char tag() {
+            return AEV_ENUM;
+        }
+
+        @Override
+        public void writeTo(BufWriter buf) {
+            buf.writeU1(tag());
+            buf.writeIndex(className);
+            buf.writeIndex(constantName);
+        }
+
+    }
+
+    public record OfAnnotationImpl(Annotation annotation)
+            implements AnnotationValue.OfAnnotation {
+        @Override
+        public char tag() {
+            return AEV_ANNOTATION;
+        }
+
+        @Override
+        public void writeTo(BufWriter buf) {
+            buf.writeU1(tag());
+            annotation.writeTo(buf);
+        }
+
+    }
+
+    public record OfClassImpl(Utf8Entry className)
+            implements AnnotationValue.OfClass {
+        @Override
+        public char tag() {
+            return AEV_CLASS;
+        }
+
+        @Override
+        public void writeTo(BufWriter buf) {
+            buf.writeU1(tag());
+            buf.writeIndex(className);
+        }
+
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/classfile/impl/AnnotationReader.class b/tests/test_data/std/jdk/internal/classfile/impl/AnnotationReader.class
new file mode 100644
index 0000000000000000000000000000000000000000..b4033f0b628b3c3edbd2d9ac28c3a38c5608a452
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i^%JN^P)|cWirUYId5lW<RJ43+Z3*_3b^K&b-roV*nE-D9

literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/classfile/impl/AnnotationReader.java b/tests/test_data/std/jdk/internal/classfile/impl/AnnotationReader.java
new file mode 100644
index 00000000..c082878a
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/classfile/impl/AnnotationReader.java
@@ -0,0 +1,282 @@
+/*
+ * Copyright (c) 2022, 2024, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package jdk.internal.classfile.impl;
+
+import java.lang.classfile.Annotation;
+import java.lang.classfile.AnnotationElement;
+import java.lang.classfile.AnnotationValue;
+import java.lang.classfile.ClassReader;
+import java.lang.classfile.constantpool.*;
+import java.lang.classfile.TypeAnnotation;
+import static java.lang.classfile.ClassFile.*;
+import static java.lang.classfile.TypeAnnotation.TargetInfo.*;
+
+import java.util.List;
+import java.lang.classfile.Label;
+import java.lang.classfile.constantpool.Utf8Entry;
+import jdk.internal.access.SharedSecrets;
+
+class AnnotationReader {
+    private AnnotationReader() { }
+
+    public static List<Annotation> readAnnotations(ClassReader classReader, int p) {
+        int pos = p;
+        int numAnnotations = classReader.readU2(pos);
+        var annos = new Object[numAnnotations];
+        pos += 2;
+        for (int i = 0; i < numAnnotations; ++i) {
+            annos[i] = readAnnotation(classReader, pos);
+            pos = skipAnnotation(classReader, pos);
+        }
+        return SharedSecrets.getJavaUtilCollectionAccess().listFromTrustedArray(annos);
+    }
+
+    public static AnnotationValue readElementValue(ClassReader classReader, int p) {
+        char tag = (char) classReader.readU1(p);
+        ++p;
+        return switch (tag) {
+            case AEV_BYTE -> new AnnotationImpl.OfByteImpl(classReader.readEntry(p, IntegerEntry.class));
+            case AEV_CHAR -> new AnnotationImpl.OfCharacterImpl(classReader.readEntry(p, IntegerEntry.class));
+            case AEV_DOUBLE -> new AnnotationImpl.OfDoubleImpl(classReader.readEntry(p, DoubleEntry.class));
+            case AEV_FLOAT -> new AnnotationImpl.OfFloatImpl(classReader.readEntry(p, FloatEntry.class));
+            case AEV_INT -> new AnnotationImpl.OfIntegerImpl(classReader.readEntry(p, IntegerEntry.class));
+            case AEV_LONG -> new AnnotationImpl.OfLongImpl(classReader.readEntry(p, LongEntry.class));
+            case AEV_SHORT -> new AnnotationImpl.OfShortImpl(classReader.readEntry(p, IntegerEntry.class));
+            case AEV_BOOLEAN -> new AnnotationImpl.OfBooleanImpl(classReader.readEntry(p, IntegerEntry.class));
+            case AEV_STRING -> new AnnotationImpl.OfStringImpl(classReader.readUtf8Entry(p));
+            case AEV_ENUM -> new AnnotationImpl.OfEnumImpl(classReader.readUtf8Entry(p), classReader.readUtf8Entry(p + 2));
+            case AEV_CLASS -> new AnnotationImpl.OfClassImpl(classReader.readUtf8Entry(p));
+            case AEV_ANNOTATION -> new AnnotationImpl.OfAnnotationImpl(readAnnotation(classReader, p));
+            case AEV_ARRAY -> {
+                int numValues = classReader.readU2(p);
+                p += 2;
+                var values = new Object[numValues];
+                for (int i = 0; i < numValues; ++i) {
+                    values[i] = readElementValue(classReader, p);
+                    p = skipElementValue(classReader, p);
+                }
+                yield new AnnotationImpl.OfArrayImpl(SharedSecrets.getJavaUtilCollectionAccess().listFromTrustedArray(values));
+            }
+            default -> throw new IllegalArgumentException(
+                    "Unexpected tag '%s' in AnnotationValue, pos = %d".formatted(tag, p - 1));
+        };
+    }
+
+    public static List<TypeAnnotation> readTypeAnnotations(ClassReader classReader, int p, LabelContext lc) {
+        int numTypeAnnotations = classReader.readU2(p);
+        p += 2;
+        var annotations = new Object[numTypeAnnotations];
+        for (int i = 0; i < numTypeAnnotations; ++i) {
+            annotations[i] = readTypeAnnotation(classReader, p, lc);
+            p = skipTypeAnnotation(classReader, p);
+        }
+        return SharedSecrets.getJavaUtilCollectionAccess().listFromTrustedArray(annotations);
+    }
+
+    public static List<List<Annotation>> readParameterAnnotations(ClassReader classReader, int p) {
+        int cnt = classReader.readU1(p++);
+        var pas = new Object[cnt];
+        for (int i = 0; i < cnt; ++i) {
+            pas[i] = readAnnotations(classReader, p);
+            p = skipAnnotations(classReader, p);
+        }
+        return SharedSecrets.getJavaUtilCollectionAccess().listFromTrustedArray(pas);
+    }
+
+    private static int skipElementValue(ClassReader classReader, int p) {
+        char tag = (char) classReader.readU1(p);
+        ++p;
+        return switch (tag) {
+            case 'B', 'C', 'D', 'F', 'I', 'J', 'S', 'Z', 's', 'c' -> p + 2;
+            case 'e' -> p + 4;
+            case '@' -> skipAnnotation(classReader, p);
+            case '[' -> {
+                int numValues = classReader.readU2(p);
+                p += 2;
+                for (int i = 0; i < numValues; ++i) {
+                    p = skipElementValue(classReader, p);
+                }
+                yield p;
+            }
+            default -> throw new IllegalArgumentException(
+                    "Unexpected tag '%s' in AnnotationValue, pos = %d".formatted(tag, p - 1));
+        };
+    }
+
+    private static Annotation readAnnotation(ClassReader classReader, int p) {
+        Utf8Entry annotationClass = classReader.entryByIndex(classReader.readU2(p), Utf8Entry.class);
+        p += 2;
+        List<AnnotationElement> elems = readAnnotationElementValuePairs(classReader, p);
+        return new AnnotationImpl(annotationClass, elems);
+    }
+
+    private static int skipAnnotations(ClassReader classReader, int p) {
+        int numAnnotations = classReader.readU2(p);
+        p += 2;
+        for (int i = 0; i < numAnnotations; ++i)
+            p = skipAnnotation(classReader, p);
+        return p;
+    }
+
+    private static int skipAnnotation(ClassReader classReader, int p) {
+        return skipElementValuePairs(classReader, p + 2);
+    }
+
+    private static List<AnnotationElement> readAnnotationElementValuePairs(ClassReader classReader, int p) {
+        int numElementValuePairs = classReader.readU2(p);
+        p += 2;
+        var annotationElements = new Object[numElementValuePairs];
+        for (int i = 0; i < numElementValuePairs; ++i) {
+            Utf8Entry elementName = classReader.readUtf8Entry(p);
+            p += 2;
+            AnnotationValue value = readElementValue(classReader, p);
+            annotationElements[i] = new AnnotationImpl.AnnotationElementImpl(elementName, value);
+            p = skipElementValue(classReader, p);
+        }
+        return SharedSecrets.getJavaUtilCollectionAccess().listFromTrustedArray(annotationElements);
+    }
+
+    private static int skipElementValuePairs(ClassReader classReader, int p) {
+        int numElementValuePairs = classReader.readU2(p);
+        p += 2;
+        for (int i = 0; i < numElementValuePairs; ++i) {
+            p = skipElementValue(classReader, p + 2);
+        }
+        return p;
+    }
+
+    private static Label getLabel(LabelContext lc, int bciOffset, int targetType, int p) {
+        //helper method to avoid NPE
+        if (lc == null) throw new IllegalArgumentException("Unexpected targetType '%d' in TypeAnnotation outside of Code attribute, pos = %d".formatted(targetType, p - 1));
+        return lc.getLabel(bciOffset);
+    }
+
+    private static TypeAnnotation readTypeAnnotation(ClassReader classReader, int p, LabelContext lc) {
+        int targetType = classReader.readU1(p++);
+        var targetInfo = switch (targetType) {
+            case TAT_CLASS_TYPE_PARAMETER ->
+                ofClassTypeParameter(classReader.readU1(p));
+            case TAT_METHOD_TYPE_PARAMETER ->
+                ofMethodTypeParameter(classReader.readU1(p));
+            case TAT_CLASS_EXTENDS ->
+                ofClassExtends(classReader.readU2(p));
+            case TAT_CLASS_TYPE_PARAMETER_BOUND ->
+                ofClassTypeParameterBound(classReader.readU1(p), classReader.readU1(p + 1));
+            case TAT_METHOD_TYPE_PARAMETER_BOUND ->
+                ofMethodTypeParameterBound(classReader.readU1(p), classReader.readU1(p + 1));
+            case TAT_FIELD ->
+                ofField();
+            case TAT_METHOD_RETURN ->
+                ofMethodReturn();
+            case TAT_METHOD_RECEIVER ->
+                ofMethodReceiver();
+            case TAT_METHOD_FORMAL_PARAMETER ->
+                ofMethodFormalParameter(classReader.readU1(p));
+            case TAT_THROWS ->
+                ofThrows(classReader.readU2(p));
+            case TAT_LOCAL_VARIABLE ->
+                ofLocalVariable(readLocalVarEntries(classReader, p, lc, targetType));
+            case TAT_RESOURCE_VARIABLE ->
+                ofResourceVariable(readLocalVarEntries(classReader, p, lc, targetType));
+            case TAT_EXCEPTION_PARAMETER ->
+                ofExceptionParameter(classReader.readU2(p));
+            case TAT_INSTANCEOF ->
+                ofInstanceofExpr(getLabel(lc, classReader.readU2(p), targetType, p));
+            case TAT_NEW ->
+                ofNewExpr(getLabel(lc, classReader.readU2(p), targetType, p));
+            case TAT_CONSTRUCTOR_REFERENCE ->
+                ofConstructorReference(getLabel(lc, classReader.readU2(p), targetType, p));
+            case TAT_METHOD_REFERENCE ->
+                ofMethodReference(getLabel(lc, classReader.readU2(p), targetType, p));
+            case TAT_CAST ->
+                ofCastExpr(getLabel(lc, classReader.readU2(p), targetType, p), classReader.readU1(p + 2));
+            case TAT_CONSTRUCTOR_INVOCATION_TYPE_ARGUMENT ->
+                ofConstructorInvocationTypeArgument(getLabel(lc, classReader.readU2(p), targetType, p), classReader.readU1(p + 2));
+            case TAT_METHOD_INVOCATION_TYPE_ARGUMENT ->
+                ofMethodInvocationTypeArgument(getLabel(lc, classReader.readU2(p), targetType, p), classReader.readU1(p + 2));
+            case TAT_CONSTRUCTOR_REFERENCE_TYPE_ARGUMENT ->
+                ofConstructorReferenceTypeArgument(getLabel(lc, classReader.readU2(p), targetType, p), classReader.readU1(p + 2));
+            case TAT_METHOD_REFERENCE_TYPE_ARGUMENT ->
+                ofMethodReferenceTypeArgument(getLabel(lc, classReader.readU2(p), targetType, p), classReader.readU1(p + 2));
+            default ->
+                throw new IllegalArgumentException("Unexpected targetType '%d' in TypeAnnotation, pos = %d".formatted(targetType, p - 1));
+        };
+        p += targetInfo.size();
+        int pathLength = classReader.readU1(p++);
+        TypeAnnotation.TypePathComponent[] typePath = new TypeAnnotation.TypePathComponent[pathLength];
+        for (int i = 0; i < pathLength; ++i) {
+            int typePathKindTag = classReader.readU1(p++);
+            int typeArgumentIndex = classReader.readU1(p++);
+            typePath[i] = switch (typePathKindTag) {
+                case 0 -> TypeAnnotation.TypePathComponent.ARRAY;
+                case 1 -> TypeAnnotation.TypePathComponent.INNER_TYPE;
+                case 2 -> TypeAnnotation.TypePathComponent.WILDCARD;
+                case 3 -> new UnboundAttribute.TypePathComponentImpl(TypeAnnotation.TypePathComponent.Kind.TYPE_ARGUMENT, typeArgumentIndex);
+                default -> throw new IllegalArgumentException("Unknown type annotation path component kind: " + typePathKindTag);
+            };
+        }
+        // the annotation info for this annotation
+        Utf8Entry type = classReader.readUtf8Entry(p);
+        p += 2;
+        return TypeAnnotation.of(targetInfo, List.of(typePath), type,
+                                 readAnnotationElementValuePairs(classReader, p));
+    }
+
+    private static List<TypeAnnotation.LocalVarTargetInfo> readLocalVarEntries(ClassReader classReader, int p, LabelContext lc, int targetType) {
+        int tableLength = classReader.readU2(p);
+        p += 2;
+        var entries = new Object[tableLength];
+        for (int i = 0; i < tableLength; ++i) {
+            int startPc = classReader.readU2(p);
+            entries[i] = TypeAnnotation.LocalVarTargetInfo.of(
+                    getLabel(lc, startPc, targetType, p),
+                    getLabel(lc, startPc + classReader.readU2(p + 2), targetType, p - 2),
+                    classReader.readU2(p + 4));
+            p += 6;
+        }
+        return SharedSecrets.getJavaUtilCollectionAccess().listFromTrustedArray(entries);
+    }
+
+    private static int skipTypeAnnotation(ClassReader classReader, int p) {
+        int targetType = classReader.readU1(p++);
+        p += switch (targetType) {
+            case 0x13, 0x14, 0x15 -> 0;
+            case 0x00, 0x01, 0x16 -> 1;
+            case 0x10, 0x11, 0x12, 0x17, 0x42, 0x43, 0x44, 0x45, 0x46 -> 2;
+            case 0x47, 0x48, 0x49, 0x4A, 0x4B -> 3;
+            case 0x40, 0x41 -> 2 + classReader.readU2(p) * 6;
+            default -> throw new IllegalArgumentException(
+                    "Unexpected targetType '%d' in TypeAnnotation, pos = %d".formatted(targetType, p - 1));
+        };
+        int pathLength = classReader.readU1(p++);
+        p += pathLength * 2;
+
+        // the annotation info for this annotation
+        p += 2;
+        p = skipElementValuePairs(classReader, p);
+        return p;
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/classfile/impl/AttributeHolder.class b/tests/test_data/std/jdk/internal/classfile/impl/AttributeHolder.class
new file mode 100644
index 0000000000000000000000000000000000000000..a843194e39a038da4838da5fce1887e3c2558270
GIT binary patch
literal 3213
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z-@zdr{W#1bxaO*}M$g;bJ=caKII7{8jzPo)cD=|aAsU5(z}`kMs^aPRyxg1AF@#}(
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zq6*i|a)CFGUYuj;GKg~=;sv8xuwH_xf*q-W9q|jMz{-LtD+yMX^(G7^AYtnWKSPwT
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z5LCc?EGkbv&Sk)>LBN<2dE!2_$OA-tN>n^0m5GK}F+Tz~6NA#MOs)l?UFX@Nu)s+O
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/classfile/impl/AttributeHolder.java b/tests/test_data/std/jdk/internal/classfile/impl/AttributeHolder.java
new file mode 100644
index 00000000..be5176ad
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/classfile/impl/AttributeHolder.java
@@ -0,0 +1,69 @@
+/*
+ * Copyright (c) 2022, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package jdk.internal.classfile.impl;
+
+import java.util.ArrayList;
+import java.util.List;
+
+import java.lang.classfile.Attribute;
+import java.lang.classfile.AttributeMapper;
+import java.lang.classfile.BufWriter;
+
+public class AttributeHolder {
+    private final List<Attribute<?>> attributes = new ArrayList<>();
+
+    public <A extends Attribute<A>> void withAttribute(Attribute<?> a) {
+        if (a == null)
+            return;
+
+        @SuppressWarnings("unchecked")
+        AttributeMapper<A> am = (AttributeMapper<A>) a.attributeMapper();
+        if (!am.allowMultiple() && isPresent(am)) {
+            remove(am);
+        }
+        attributes.add(a);
+    }
+
+    public int size() {
+        return attributes.size();
+    }
+
+    public void writeTo(BufWriter buf) {
+        buf.writeU2(attributes.size());
+        for (Attribute<?> a : attributes)
+            a.writeTo(buf);
+    }
+
+    boolean isPresent(AttributeMapper<?> am) {
+        for (Attribute<?> a : attributes)
+            if (a.attributeMapper() == am)
+                return true;
+        return false;
+    }
+
+    private void remove(AttributeMapper<?> am) {
+        attributes.removeIf(a -> a.attributeMapper() == am);
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/classfile/impl/BlockCodeBuilderImpl.class b/tests/test_data/std/jdk/internal/classfile/impl/BlockCodeBuilderImpl.class
new file mode 100644
index 0000000000000000000000000000000000000000..8eb8cd0f1b3bf98d4ca0915c1469b93b334432d1
GIT binary patch
literal 4018
zcmb7HYj+dZ72VgCJhD8-#s!MOfCGlul8X!>2}R}+JCHb7CaH}bLy~4JUF^Z58D%u$
zk)}=hNYeNFMZfeTYjyQQ+l8SdYc=$1e@XvDAN!03X>4St)mqY>d*_~W_Bm&tbFcpK
z?@#^)U=qJgqYdo_5+;)9P&j_Qw3@TsK>M!c<cf|}tzNSoowLgoCpY8Ci?YpElU_+r
z)NH4ueT9y3+qHu;3PZ!w*R2~?&avF(m~d=!eq_EADRdf0o9Ke6Ft(M&3CAn0#>A%x
zL!r~xR&m8za<qcFBKo$O=n-W-D^_*Ntp<Lr7}%a$?ZS5S8Tf*U9oVUG;B(L^q+ES-
z+FH`IvTt~#r8nX0yjcCBiQVW|NLK^P4<fO>pCh!_#DEB;v|9>A(%6p!1_n($g@X#)
zLyWb+c5;`NuIpk@RoLe1cWSn;nShy^Lu^Olfv#`M$I(Vh28I;+TR9zC79Wn7cslf9
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z{4$Gm0SE9pDY;0BT;-+g4f_06=&964mgv5L_rm}e8eSFf0lrDF;#Csu<857>?8eRr
zf1E<Q#BQ8I#aQ;66dGtLyl12EN=xBy;oFhrD^cWjFhXOeC1zvU`_ON*R0o<|-WEo;
zOz18v#cMbV{?B{d40hl<>_XC$dhih&hBSkxTY@~i5oGWr$le#^l1?Q;>Ss6#VLLO-
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I_zn913)61Vpa1{>

literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/classfile/impl/BlockCodeBuilderImpl.java b/tests/test_data/std/jdk/internal/classfile/impl/BlockCodeBuilderImpl.java
new file mode 100644
index 00000000..66e974b4
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/classfile/impl/BlockCodeBuilderImpl.java
@@ -0,0 +1,118 @@
+/*
+ * Copyright (c) 2022, 2024, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package jdk.internal.classfile.impl;
+
+import java.lang.classfile.CodeBuilder;
+import java.lang.classfile.CodeElement;
+import java.lang.classfile.Label;
+import java.lang.classfile.TypeKind;
+import java.lang.classfile.instruction.LabelTarget;
+
+import java.util.Objects;
+import java.lang.classfile.Instruction;
+
+public final class BlockCodeBuilderImpl
+        extends NonterminalCodeBuilder
+        implements CodeBuilder.BlockCodeBuilder {
+    private final Label startLabel, endLabel, breakLabel;
+    private boolean reachable = true;
+    private boolean hasInstructions = false;
+    private int topLocal;
+    private int terminalMaxLocals;
+
+    public BlockCodeBuilderImpl(CodeBuilder parent, Label breakLabel) {
+        super(parent);
+        this.startLabel = parent.newLabel();
+        this.endLabel = parent.newLabel();
+        this.breakLabel = Objects.requireNonNull(breakLabel);
+    }
+
+    public void start() {
+        topLocal = topLocal(parent);
+        terminalMaxLocals = terminal.curTopLocal();
+        parent.with((LabelTarget) startLabel);
+    }
+
+    public void end() {
+        parent.with((LabelTarget) endLabel);
+        if (terminalMaxLocals != terminal.curTopLocal()) {
+            throw new IllegalStateException("Interference in local variable slot management");
+        }
+    }
+
+    public boolean reachable() {
+        return reachable;
+    }
+
+    public boolean isEmpty() {
+        return !hasInstructions;
+    }
+
+    private int topLocal(CodeBuilder parent) {
+        return switch (parent) {
+            case BlockCodeBuilderImpl b -> b.topLocal;
+            case ChainedCodeBuilder b -> b.terminal.curTopLocal();
+            case TerminalCodeBuilder b -> b.curTopLocal();
+        };
+    }
+
+    @Override
+    public CodeBuilder with(CodeElement element) {
+        parent.with(element);
+
+        hasInstructions |= element instanceof Instruction;
+
+        if (reachable) {
+            if (element instanceof Instruction i && i.opcode().isUnconditionalBranch())
+                reachable = false;
+        }
+        else if (element instanceof LabelTarget) {
+            reachable = true;
+        }
+        return this;
+    }
+
+    @Override
+    public Label startLabel() {
+        return startLabel;
+    }
+
+    @Override
+    public Label endLabel() {
+        return endLabel;
+    }
+
+    @Override
+    public int allocateLocal(TypeKind typeKind) {
+        int retVal = topLocal;
+        topLocal += typeKind.slotSize();
+        return retVal;
+    }
+
+    @Override
+    public Label breakLabel() {
+        return breakLabel;
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/classfile/impl/BootstrapMethodEntryImpl.class b/tests/test_data/std/jdk/internal/classfile/impl/BootstrapMethodEntryImpl.class
new file mode 100644
index 0000000000000000000000000000000000000000..da954d191f3ac658a81c6aa742262ff5d538db4a
GIT binary patch
literal 3300
zcmd5;-BTM?6#w0Pun-oADM8T|khYqSw##Q~4I(8{NgE0k1gvfCCRxbRWj7`pl{a5~
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zs2~ifn2SRQegdb*7@+FoNJvP^xPq$;Q(j<>$Z{+MF{FK3Qw=IG>N3>UbLsefj$7e$
zOfW<mD4PTe{u3cgV@ATPj1;ajWL|)<4Bfm5GggsWh59|qg{B;DGhF>w;r$D=y+YK0
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zr|uEac!N<yy`T}_=h{0`v|fCZT5et6HC4M-p}KE(wA`HY`?Ma(S!z+u8(L%kIe_NV
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z$>u_g(Ha>se27g!da5Z&3R~DFBp=bLAbc|mbU)xeK6WeIrje@@36Caz!c-|)$6E}K
zBk3<&i5;R>MWP{RHGkWZ7jHzT@mfmqnFo~6q2eJ~Yq(C|P9-Itpk2vz4?gJ@^mOj)
zbl&oGeuPil%=g?nqe&`ru8wzn;8v!N_k7?@?;z<HN<E+l)I$v7QCrE;CZkb2hDu?5
S$P2#$iZq63W*Rr3VfY`CC0GCe

literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/classfile/impl/BootstrapMethodEntryImpl.java b/tests/test_data/std/jdk/internal/classfile/impl/BootstrapMethodEntryImpl.java
new file mode 100644
index 00000000..d6876a82
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/classfile/impl/BootstrapMethodEntryImpl.java
@@ -0,0 +1,95 @@
+/*
+ * Copyright (c) 2022, 2024, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package jdk.internal.classfile.impl;
+
+import java.util.List;
+
+import java.lang.classfile.constantpool.ConstantPool;
+import java.lang.classfile.BootstrapMethodEntry;
+import java.lang.classfile.BufWriter;
+import java.lang.classfile.constantpool.LoadableConstantEntry;
+import java.lang.classfile.constantpool.MethodHandleEntry;
+
+import static jdk.internal.classfile.impl.AbstractPoolEntry.MethodHandleEntryImpl;
+
+public final class BootstrapMethodEntryImpl implements BootstrapMethodEntry {
+
+    final int index;
+    final int hash;
+    private final ConstantPool constantPool;
+    private final MethodHandleEntryImpl handle;
+    private final List<LoadableConstantEntry> arguments;
+
+    BootstrapMethodEntryImpl(ConstantPool constantPool, int bsmIndex, int hash,
+                                 MethodHandleEntryImpl handle,
+                                 List<LoadableConstantEntry> arguments) {
+        this.index = bsmIndex;
+        this.hash = hash;
+        this.constantPool = constantPool;
+        this.handle = handle;
+        this.arguments = List.copyOf(arguments);
+    }
+
+    @Override
+    public ConstantPool constantPool() {
+        return constantPool;
+    }
+
+    @Override
+    public MethodHandleEntry bootstrapMethod() {
+        return handle;
+    }
+
+    @Override
+    public List<LoadableConstantEntry> arguments() {
+        return arguments;
+    }
+
+    @Override
+    public boolean equals(Object obj) {
+        return obj instanceof BootstrapMethodEntry e
+                && e.bootstrapMethod().equals(handle)
+                && e.arguments().equals(arguments);
+    }
+
+    static int computeHashCode(MethodHandleEntryImpl handle,
+                               List<? extends LoadableConstantEntry> arguments) {
+        return (31 * handle.hashCode() + arguments.hashCode()) | AbstractPoolEntry.NON_ZERO;
+    }
+
+    @Override
+    public int bsmIndex() { return index; }
+
+    @Override
+    public int hashCode() {
+        return hash;
+    }
+
+    @Override
+    public void writeTo(BufWriter writer) {
+        writer.writeIndex(bootstrapMethod());
+        writer.writeListIndices(arguments());
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/classfile/impl/BoundAttribute$1.class b/tests/test_data/std/jdk/internal/classfile/impl/BoundAttribute$1.class
new file mode 100644
index 0000000000000000000000000000000000000000..26a08d4086f7c10787f51bbdcde0f85e6b0ce3a0
GIT binary patch
literal 2788
zcmb_eYf~Fl7=F$Y$c3d%Lv2OH8jChJNLvwWgII!KV?#hFLBy(?WT8u!vzg7=0^=WX
z#!r6nHjd-HgU(bx`=cD+-7LEcT^Mv^hMco!-^=qp@8#@YfB*Ivzzmc)B=kfPk<p7j
zhQe0sK~dvEHMyb}o4V5JY-qY#)VAAtv20kpH7$gxH7ucyTw{nmRP+(9Y^$VM-BKPZ
zMP1>W0llWdJ3`^2Z5VoSMQq%d<-*)6B@jbAiiC`Q$P7teb)m7PHU&f9q{cNd#n6+<
z*86b=XQN2UIENHN&KLI)hI?Y@?+{+TSyyz6P@d0Z12~tRSEVS<GhFeFuJDf4ZX2dh
zTMKQ~RD@>m+1;kvwl@h3BHoXScshz98PDKZhGAdV2UNB;R!xnVWJv7Tn+k8Ky9~ul
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zy-TDKr>aQOngkh~z_M%bI%UDhRW4s3bK^$=1*;|I24kBWAQWA5&f1H+bSPm3b!T10
ed$dNdhIM@CoUGv^T2mxrm#6)gr!xNd*3dsx2Hvg!

literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/classfile/impl/BoundAttribute$BoundAnnotationDefaultAttr.class b/tests/test_data/std/jdk/internal/classfile/impl/BoundAttribute$BoundAnnotationDefaultAttr.class
new file mode 100644
index 0000000000000000000000000000000000000000..b2fa13edc200e4c67518f5f8550acdc00a824fce
GIT binary patch
literal 1728
zcmb_cT~8B16g{(BSz4A40jq$hC<rYd3+jVO2?-)<P31vM--mXJ3)|UdJ8Qxp@Q3&d
zG|^~$@YTd0WxUhf*48YgMzh(SnY(x9o_p?@`{U==Zvgi2AOi!Yg_Mm;7-GnuR8JjO
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diff --git a/tests/test_data/std/jdk/internal/classfile/impl/BoundAttribute$BoundBootstrapMethodsAttribute.class b/tests/test_data/std/jdk/internal/classfile/impl/BoundAttribute$BoundBootstrapMethodsAttribute.class
new file mode 100644
index 0000000000000000000000000000000000000000..70feb2d0ffaa5e71f2f634ec4dfce274e29ecca0
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diff --git a/tests/test_data/std/jdk/internal/classfile/impl/BoundAttribute$BoundCharacterRangeTableAttribute.class b/tests/test_data/std/jdk/internal/classfile/impl/BoundAttribute$BoundCharacterRangeTableAttribute.class
new file mode 100644
index 0000000000000000000000000000000000000000..7994616141b44ddda23728acfbb640e0ed9a273c
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diff --git a/tests/test_data/std/jdk/internal/classfile/impl/BoundAttribute$BoundCodeAttribute.class b/tests/test_data/std/jdk/internal/classfile/impl/BoundAttribute$BoundCodeAttribute.class
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diff --git a/tests/test_data/std/jdk/internal/classfile/impl/BoundAttribute$BoundCompilationIDAttribute.class b/tests/test_data/std/jdk/internal/classfile/impl/BoundAttribute$BoundCompilationIDAttribute.class
new file mode 100644
index 0000000000000000000000000000000000000000..b02ac40b513215afbf62ad31fa2aaf895316b895
GIT binary patch
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diff --git a/tests/test_data/std/jdk/internal/classfile/impl/BoundAttribute$BoundConstantValueAttribute.class b/tests/test_data/std/jdk/internal/classfile/impl/BoundAttribute$BoundConstantValueAttribute.class
new file mode 100644
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diff --git a/tests/test_data/std/jdk/internal/classfile/impl/BoundAttribute$BoundDeprecatedAttribute.class b/tests/test_data/std/jdk/internal/classfile/impl/BoundAttribute$BoundDeprecatedAttribute.class
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diff --git a/tests/test_data/std/jdk/internal/classfile/impl/BoundAttribute$BoundEnclosingMethodAttribute.class b/tests/test_data/std/jdk/internal/classfile/impl/BoundAttribute$BoundEnclosingMethodAttribute.class
new file mode 100644
index 0000000000000000000000000000000000000000..cdc799279d421ab1a936d474278f1cfab2bda9ab
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diff --git a/tests/test_data/std/jdk/internal/classfile/impl/BoundAttribute$BoundExceptionsAttribute.class b/tests/test_data/std/jdk/internal/classfile/impl/BoundAttribute$BoundExceptionsAttribute.class
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diff --git a/tests/test_data/std/jdk/internal/classfile/impl/BoundAttribute$BoundInnerClassesAttribute.class b/tests/test_data/std/jdk/internal/classfile/impl/BoundAttribute$BoundInnerClassesAttribute.class
new file mode 100644
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diff --git a/tests/test_data/std/jdk/internal/classfile/impl/BoundAttribute$BoundLineNumberTableAttribute.class b/tests/test_data/std/jdk/internal/classfile/impl/BoundAttribute$BoundLineNumberTableAttribute.class
new file mode 100644
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diff --git a/tests/test_data/std/jdk/internal/classfile/impl/BoundAttribute$BoundLocalVariableTableAttribute.class b/tests/test_data/std/jdk/internal/classfile/impl/BoundAttribute$BoundLocalVariableTableAttribute.class
new file mode 100644
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diff --git a/tests/test_data/std/jdk/internal/classfile/impl/BoundAttribute$BoundLocalVariableTypeTableAttribute.class b/tests/test_data/std/jdk/internal/classfile/impl/BoundAttribute$BoundLocalVariableTypeTableAttribute.class
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diff --git a/tests/test_data/std/jdk/internal/classfile/impl/BoundAttribute$BoundMethodParametersAttribute.class b/tests/test_data/std/jdk/internal/classfile/impl/BoundAttribute$BoundMethodParametersAttribute.class
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diff --git a/tests/test_data/std/jdk/internal/classfile/impl/BoundAttribute$BoundModuleHashesAttribute.class b/tests/test_data/std/jdk/internal/classfile/impl/BoundAttribute$BoundModuleHashesAttribute.class
new file mode 100644
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diff --git a/tests/test_data/std/jdk/internal/classfile/impl/BoundAttribute$BoundModuleMainClassAttribute.class b/tests/test_data/std/jdk/internal/classfile/impl/BoundAttribute$BoundModuleMainClassAttribute.class
new file mode 100644
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GIT binary patch
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diff --git a/tests/test_data/std/jdk/internal/classfile/impl/BoundAttribute$BoundModulePackagesAttribute.class b/tests/test_data/std/jdk/internal/classfile/impl/BoundAttribute$BoundModulePackagesAttribute.class
new file mode 100644
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diff --git a/tests/test_data/std/jdk/internal/classfile/impl/BoundAttribute$BoundModuleResolutionAttribute.class b/tests/test_data/std/jdk/internal/classfile/impl/BoundAttribute$BoundModuleResolutionAttribute.class
new file mode 100644
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GIT binary patch
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diff --git a/tests/test_data/std/jdk/internal/classfile/impl/BoundAttribute$BoundModuleTargetAttribute.class b/tests/test_data/std/jdk/internal/classfile/impl/BoundAttribute$BoundModuleTargetAttribute.class
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diff --git a/tests/test_data/std/jdk/internal/classfile/impl/BoundAttribute$BoundNestHostAttribute.class b/tests/test_data/std/jdk/internal/classfile/impl/BoundAttribute$BoundNestHostAttribute.class
new file mode 100644
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GIT binary patch
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diff --git a/tests/test_data/std/jdk/internal/classfile/impl/BoundAttribute$BoundNestMembersAttribute.class b/tests/test_data/std/jdk/internal/classfile/impl/BoundAttribute$BoundNestMembersAttribute.class
new file mode 100644
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GIT binary patch
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diff --git a/tests/test_data/std/jdk/internal/classfile/impl/BoundAttribute$BoundPermittedSubclassesAttribute.class b/tests/test_data/std/jdk/internal/classfile/impl/BoundAttribute$BoundPermittedSubclassesAttribute.class
new file mode 100644
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GIT binary patch
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diff --git a/tests/test_data/std/jdk/internal/classfile/impl/BoundAttribute$BoundRecordAttribute.class b/tests/test_data/std/jdk/internal/classfile/impl/BoundAttribute$BoundRecordAttribute.class
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diff --git a/tests/test_data/std/jdk/internal/classfile/impl/BoundAttribute$BoundRuntimeInvisibleAnnotationsAttribute.class b/tests/test_data/std/jdk/internal/classfile/impl/BoundAttribute$BoundRuntimeInvisibleAnnotationsAttribute.class
new file mode 100644
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diff --git a/tests/test_data/std/jdk/internal/classfile/impl/BoundAttribute$BoundRuntimeInvisibleParameterAnnotationsAttribute.class b/tests/test_data/std/jdk/internal/classfile/impl/BoundAttribute$BoundRuntimeInvisibleParameterAnnotationsAttribute.class
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diff --git a/tests/test_data/std/jdk/internal/classfile/impl/BoundAttribute$BoundRuntimeInvisibleTypeAnnotationsAttribute.class b/tests/test_data/std/jdk/internal/classfile/impl/BoundAttribute$BoundRuntimeInvisibleTypeAnnotationsAttribute.class
new file mode 100644
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diff --git a/tests/test_data/std/jdk/internal/classfile/impl/BoundAttribute$BoundRuntimeVisibleAnnotationsAttribute.class b/tests/test_data/std/jdk/internal/classfile/impl/BoundAttribute$BoundRuntimeVisibleAnnotationsAttribute.class
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diff --git a/tests/test_data/std/jdk/internal/classfile/impl/BoundAttribute$BoundRuntimeVisibleParameterAnnotationsAttribute.class b/tests/test_data/std/jdk/internal/classfile/impl/BoundAttribute$BoundRuntimeVisibleParameterAnnotationsAttribute.class
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diff --git a/tests/test_data/std/jdk/internal/classfile/impl/BoundAttribute$BoundRuntimeVisibleTypeAnnotationsAttribute.class b/tests/test_data/std/jdk/internal/classfile/impl/BoundAttribute$BoundRuntimeVisibleTypeAnnotationsAttribute.class
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diff --git a/tests/test_data/std/jdk/internal/classfile/impl/BoundAttribute$BoundSignatureAttribute.class b/tests/test_data/std/jdk/internal/classfile/impl/BoundAttribute$BoundSignatureAttribute.class
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diff --git a/tests/test_data/std/jdk/internal/classfile/impl/BoundAttribute$BoundSourceDebugExtensionAttribute.class b/tests/test_data/std/jdk/internal/classfile/impl/BoundAttribute$BoundSourceDebugExtensionAttribute.class
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diff --git a/tests/test_data/std/jdk/internal/classfile/impl/BoundAttribute$BoundSourceFileAttribute.class b/tests/test_data/std/jdk/internal/classfile/impl/BoundAttribute$BoundSourceFileAttribute.class
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diff --git a/tests/test_data/std/jdk/internal/classfile/impl/BoundAttribute.java b/tests/test_data/std/jdk/internal/classfile/impl/BoundAttribute.java
new file mode 100644
index 00000000..6fea4e44
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/classfile/impl/BoundAttribute.java
@@ -0,0 +1,1066 @@
+/*
+ * Copyright (c) 2022, 2024, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package jdk.internal.classfile.impl;
+
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.List;
+import java.util.Optional;
+import java.util.function.Function;
+
+import java.lang.classfile.*;
+import java.lang.classfile.attribute.*;
+import java.lang.classfile.constantpool.ClassEntry;
+import java.lang.classfile.constantpool.ConstantPool;
+import java.lang.classfile.constantpool.ConstantValueEntry;
+import java.lang.classfile.constantpool.LoadableConstantEntry;
+import java.lang.classfile.constantpool.ModuleEntry;
+import java.lang.classfile.constantpool.NameAndTypeEntry;
+import java.lang.classfile.constantpool.PackageEntry;
+import java.lang.classfile.constantpool.Utf8Entry;
+import jdk.internal.access.SharedSecrets;
+
+import static java.lang.classfile.Attributes.*;
+
+public abstract sealed class BoundAttribute<T extends Attribute<T>>
+        extends AbstractElement
+        implements Attribute<T> {
+
+    static final int NAME_AND_LENGTH_PREFIX = 6;
+    private final AttributeMapper<T> mapper;
+    final ClassReaderImpl classReader;
+    final int payloadStart;
+
+    BoundAttribute(ClassReader classReader, AttributeMapper<T> mapper, int payloadStart) {
+        this.mapper = mapper;
+        this.classReader = (ClassReaderImpl)classReader;
+        this.payloadStart = payloadStart;
+    }
+
+    public int payloadLen() {
+        return classReader.readInt(payloadStart - 4);
+    }
+
+    @Override
+    public String attributeName() {
+        return mapper.name();
+    }
+
+    @Override
+    public AttributeMapper<T> attributeMapper() {
+        return mapper;
+    }
+
+    public byte[] contents() {
+        return classReader.readBytes(payloadStart, payloadLen());
+    }
+
+    @Override
+    public void writeTo(DirectClassBuilder builder) {
+        builder.writeAttribute(this);
+    }
+
+    @Override
+    public void writeTo(DirectCodeBuilder builder) {
+        builder.writeAttribute(this);
+    }
+
+    @Override
+    public void writeTo(DirectMethodBuilder builder) {
+        builder.writeAttribute(this);
+    }
+
+    @Override
+    public void writeTo(DirectFieldBuilder builder) {
+        builder.writeAttribute(this);
+    }
+
+    @Override
+    @SuppressWarnings("unchecked")
+    public void writeTo(BufWriter buf) {
+        if (!buf.canWriteDirect(classReader))
+            attributeMapper().writeAttribute(buf, (T) this);
+        else
+            classReader.copyBytesTo(buf, payloadStart - NAME_AND_LENGTH_PREFIX, payloadLen() + NAME_AND_LENGTH_PREFIX);
+    }
+
+    public ConstantPool constantPool() {
+        return classReader;
+    }
+
+    @Override
+    public String toString() {
+        return String.format("Attribute[name=%s]", mapper.name());
+    }
+
+    <E> List<E> readEntryList(int p) {
+        int cnt = classReader.readU2(p);
+        p += 2;
+        var entries = new Object[cnt];
+        int end = p + (cnt * 2);
+        for (int i = 0; p < end; i++, p += 2) {
+            entries[i] = classReader.readEntry(p);
+        }
+        return SharedSecrets.getJavaUtilCollectionAccess().listFromTrustedArray(entries);
+    }
+
+    public static List<Attribute<?>> readAttributes(AttributedElement enclosing, ClassReader reader, int pos,
+                                                                  Function<Utf8Entry, AttributeMapper<?>> customAttributes) {
+        int size = reader.readU2(pos);
+        var filled = new ArrayList<Attribute<?>>(size);
+        int p = pos + 2;
+        int cfLen = reader.classfileLength();
+        var apo = ((ClassReaderImpl)reader).context().attributesProcessingOption();
+        for (int i = 0; i < size; ++i) {
+            Utf8Entry name = reader.readUtf8Entry(p);
+            int len = reader.readInt(p + 2);
+            p += 6;
+            if (len < 0 || len > cfLen - p) {
+                throw new IllegalArgumentException("attribute " + name.stringValue() + " too big to handle");
+            }
+
+            var mapper = standardAttribute(name);
+            if (mapper == null) {
+                mapper = customAttributes.apply(name);
+            }
+            if (mapper != null) {
+                filled.add((Attribute)mapper.readAttribute(enclosing, reader, p));
+            } else {
+                AttributeMapper<UnknownAttribute> fakeMapper = new AttributeMapper<>() {
+                    @Override
+                    public String name() {
+                        return name.stringValue();
+                    }
+
+                    @Override
+                    public UnknownAttribute readAttribute(AttributedElement enclosing, ClassReader cf, int pos) {
+                        // Will never get called
+                        throw new UnsupportedOperationException();
+                    }
+
+                    @Override
+                    public void writeAttribute(BufWriter buf, UnknownAttribute attr) {
+                        buf.writeIndex(name);
+                        var cont = attr.contents();
+                        buf.writeInt(cont.length);
+                        buf.writeBytes(cont);
+                    }
+
+                    @Override
+                    public boolean allowMultiple() {
+                        return true;
+                    }
+
+                    @Override
+                    public AttributeMapper.AttributeStability stability() {
+                        return AttributeStability.UNKNOWN;
+                    }
+                };
+                filled.add(new BoundUnknownAttribute(reader, fakeMapper, p));
+            }
+            p += len;
+        }
+        return Collections.unmodifiableList(filled);
+    }
+
+    public static final class BoundUnknownAttribute extends BoundAttribute<UnknownAttribute>
+            implements UnknownAttribute {
+        public BoundUnknownAttribute(ClassReader cf, AttributeMapper<UnknownAttribute> mapper, int pos) {
+            super(cf, mapper, pos);
+        }
+    }
+
+    public static final class BoundStackMapTableAttribute
+            extends BoundAttribute<StackMapTableAttribute>
+            implements StackMapTableAttribute {
+        final MethodModel method;
+        final LabelContext ctx;
+        List<StackMapFrameInfo> entries = null;
+
+        public BoundStackMapTableAttribute(CodeImpl code, ClassReader cf, AttributeMapper<StackMapTableAttribute> mapper, int pos) {
+            super(cf, mapper, pos);
+            method = code.parent().orElseThrow();
+            ctx = code;
+        }
+
+        @Override
+        public List<StackMapFrameInfo> entries() {
+            if (entries == null) {
+                entries = new StackMapDecoder(classReader, payloadStart, ctx, StackMapDecoder.initFrameLocals(method)).entries();
+            }
+            return entries;
+        }
+    }
+
+    public static final class BoundSyntheticAttribute extends BoundAttribute<SyntheticAttribute>
+            implements SyntheticAttribute {
+        public BoundSyntheticAttribute(ClassReader cf, AttributeMapper<SyntheticAttribute> mapper, int pos) {
+            super(cf, mapper, pos);
+        }
+    }
+
+    public static final class BoundLineNumberTableAttribute
+            extends BoundAttribute<LineNumberTableAttribute>
+            implements LineNumberTableAttribute {
+        private List<LineNumberInfo> lineNumbers = null;
+
+        public BoundLineNumberTableAttribute(ClassReader cf, AttributeMapper<LineNumberTableAttribute> mapper, int pos) {
+            super(cf, mapper, pos);
+        }
+
+        @Override
+        public List<LineNumberInfo> lineNumbers() {
+            if (lineNumbers == null) {
+                int nLn = classReader.readU2(payloadStart);
+                LineNumberInfo[] elements = new LineNumberInfo[nLn];
+                int p = payloadStart + 2;
+                int pEnd = p + (nLn * 4);
+                for (int i = 0; p < pEnd; p += 4, i++) {
+                    int startPc = classReader.readU2(p);
+                    int lineNumber = classReader.readU2(p + 2);
+                    elements[i] = LineNumberInfo.of(startPc, lineNumber);
+                }
+                lineNumbers = List.of(elements);
+            }
+            return lineNumbers;
+        }
+    }
+
+    public static final class BoundCharacterRangeTableAttribute extends BoundAttribute<CharacterRangeTableAttribute> implements CharacterRangeTableAttribute {
+        private List<CharacterRangeInfo> characterRangeTable = null;
+
+        public BoundCharacterRangeTableAttribute(ClassReader cf, AttributeMapper<CharacterRangeTableAttribute> mapper, int pos) {
+            super(cf, mapper, pos);
+        }
+
+        @Override
+        public List<CharacterRangeInfo> characterRangeTable() {
+            if (characterRangeTable == null) {
+                int nLn = classReader.readU2(payloadStart);
+                CharacterRangeInfo[] elements = new CharacterRangeInfo[nLn];
+                int p = payloadStart + 2;
+                int pEnd = p + (nLn * 14);
+                for (int i = 0; p < pEnd; p += 14, i++) {
+                    int startPc = classReader.readU2(p);
+                    int endPc = classReader.readU2(p + 2);
+                    int characterRangeStart = classReader.readInt(p + 4);
+                    int characterRangeEnd = classReader.readInt(p + 8);
+                    int flags = classReader.readU2(p + 12);
+                    elements[i] = CharacterRangeInfo.of(startPc, endPc, characterRangeStart, characterRangeEnd, flags);
+                }
+                characterRangeTable = List.of(elements);
+            }
+            return characterRangeTable;
+        }
+    }
+
+    public static final class BoundLocalVariableTableAttribute
+            extends BoundAttribute<LocalVariableTableAttribute>
+            implements LocalVariableTableAttribute {
+        private final CodeImpl codeAttribute;
+        private List<LocalVariableInfo> localVars = null;
+
+        public BoundLocalVariableTableAttribute(AttributedElement enclosing, ClassReader cf, AttributeMapper<LocalVariableTableAttribute> mapper, int pos) {
+            super(cf, mapper, pos);
+            codeAttribute = (CodeImpl) enclosing;
+        }
+
+        @Override
+        public List<LocalVariableInfo> localVariables() {
+            if (localVars == null) {
+                int cnt = classReader.readU2(payloadStart);
+                BoundLocalVariable[] elements = new BoundLocalVariable[cnt];
+                int p = payloadStart + 2;
+                int pEnd = p + (cnt * 10);
+                for (int i = 0; p < pEnd; p += 10, i++) {
+                    elements[i] = new BoundLocalVariable(codeAttribute, p);
+                }
+                localVars = List.of(elements);
+            }
+            return localVars;
+        }
+    }
+
+    public static final class BoundLocalVariableTypeTableAttribute
+            extends BoundAttribute<LocalVariableTypeTableAttribute>
+            implements LocalVariableTypeTableAttribute {
+        private final CodeImpl codeAttribute;
+        private List<LocalVariableTypeInfo> localVars = null;
+
+        public BoundLocalVariableTypeTableAttribute(AttributedElement enclosing, ClassReader cf, AttributeMapper<LocalVariableTypeTableAttribute> mapper, int pos) {
+            super(cf, mapper, pos);
+            this.codeAttribute = (CodeImpl) enclosing;
+        }
+
+        @Override
+        public List<LocalVariableTypeInfo> localVariableTypes() {
+            if (localVars == null) {
+                final int cnt = classReader.readU2(payloadStart);
+                BoundLocalVariableType[] elements = new BoundLocalVariableType[cnt];
+                int p = payloadStart + 2;
+                int pEnd = p + (cnt * 10);
+                for (int i = 0; p < pEnd; p += 10, i++) {
+                    elements[i] = new BoundLocalVariableType(codeAttribute, p);
+                }
+                localVars = List.of(elements);
+            }
+            return localVars;
+        }
+    }
+
+    public static final class BoundMethodParametersAttribute extends BoundAttribute<MethodParametersAttribute>
+            implements MethodParametersAttribute {
+        private List<MethodParameterInfo> parameters = null;
+
+        public BoundMethodParametersAttribute(ClassReader cf, AttributeMapper<MethodParametersAttribute> mapper, int pos) {
+            super(cf, mapper, pos);
+        }
+
+        @Override
+        public List<MethodParameterInfo> parameters() {
+            if (parameters == null) {
+                final int cnt = classReader.readU1(payloadStart);
+                MethodParameterInfo[] elements = new MethodParameterInfo[cnt];
+                int p = payloadStart + 1;
+                int pEnd = p + (cnt * 4);
+                for (int i = 0; p < pEnd; p += 4, i++) {
+                    Utf8Entry name = classReader.readUtf8EntryOrNull(p);
+                    int accessFlags = classReader.readU2(p + 2);
+                    elements[i] = MethodParameterInfo.of(Optional.ofNullable(name), accessFlags);
+                }
+                parameters = List.of(elements);
+            }
+            return parameters;
+        }
+    }
+
+    public static final class BoundModuleHashesAttribute extends BoundAttribute<ModuleHashesAttribute>
+            implements ModuleHashesAttribute {
+        private List<ModuleHashInfo> hashes = null;
+
+        public BoundModuleHashesAttribute(ClassReader cf, AttributeMapper<ModuleHashesAttribute> mapper, int pos) {
+            super(cf, mapper, pos);
+        }
+
+        @Override
+        public Utf8Entry algorithm() {
+            return classReader.readUtf8Entry(payloadStart);
+        }
+
+        @Override
+        public List<ModuleHashInfo> hashes() {
+            if (hashes == null) {
+                final int cnt = classReader.readU2(payloadStart + 2);
+                ModuleHashInfo[] elements = new ModuleHashInfo[cnt];
+                int p = payloadStart + 4;
+                //System.err.printf("%5d: ModuleHashesAttr alg = %s, cnt = %d%n", pos, algorithm(), cnt);
+                for (int i = 0; i < cnt; ++i) {
+                    ModuleEntry module = classReader.readModuleEntry(p);
+                    int hashLength = classReader.readU2(p + 2);
+                    //System.err.printf("%5d:     [%d] module = %s, hashLength = %d%n", p, i, module, hashLength);
+                    p += 4;
+                    elements[i] = ModuleHashInfo.of(module, classReader.readBytes(p, hashLength));
+                    p += hashLength;
+                }
+                hashes = List.of(elements);
+            }
+            return hashes;
+        }
+    }
+
+    public static final class BoundRecordAttribute extends BoundAttribute<RecordAttribute>
+            implements RecordAttribute {
+        private List<RecordComponentInfo> components = null;
+
+        public BoundRecordAttribute(ClassReader cf, AttributeMapper<RecordAttribute> mapper, int pos) {
+            super(cf, mapper, pos);
+        }
+
+        @Override
+        public List<RecordComponentInfo> components() {
+            if (components == null) {
+                final int cnt = classReader.readU2(payloadStart);
+                RecordComponentInfo[] elements = new RecordComponentInfo[cnt];
+                int p = payloadStart + 2;
+                for (int i = 0; i < cnt; i++) {
+                    elements[i] = new BoundRecordComponentInfo(classReader, p);
+                    p = classReader.skipAttributeHolder(p + 4);
+                }
+                components = List.of(elements);
+            }
+            return components;
+        }
+    }
+
+    public static final class BoundDeprecatedAttribute extends BoundAttribute<DeprecatedAttribute>
+            implements DeprecatedAttribute {
+        public BoundDeprecatedAttribute(ClassReader cf, AttributeMapper<DeprecatedAttribute> mapper, int pos) {
+            super(cf, mapper, pos);
+        }
+    }
+
+    public static final class BoundSignatureAttribute extends BoundAttribute<SignatureAttribute>
+            implements SignatureAttribute {
+        public BoundSignatureAttribute(ClassReader cf, AttributeMapper<SignatureAttribute> mapper, int pos) {
+            super(cf, mapper, pos);
+        }
+
+        @Override
+        public Utf8Entry signature() {
+            return classReader.readUtf8Entry(payloadStart);
+        }
+    }
+
+    public static final class BoundSourceFileAttribute extends BoundAttribute<SourceFileAttribute>
+            implements SourceFileAttribute {
+        public BoundSourceFileAttribute(ClassReader cf, AttributeMapper<SourceFileAttribute> mapper, int pos) {
+            super(cf, mapper, pos);
+        }
+
+        @Override
+        public Utf8Entry sourceFile() {
+            return classReader.readUtf8Entry(payloadStart);
+        }
+
+    }
+
+    public static final class BoundModuleMainClassAttribute extends BoundAttribute<ModuleMainClassAttribute> implements ModuleMainClassAttribute {
+        public BoundModuleMainClassAttribute(ClassReader cf, AttributeMapper<ModuleMainClassAttribute> mapper, int pos) {
+            super(cf, mapper, pos);
+        }
+
+        @Override
+        public ClassEntry mainClass() {
+            return classReader.readClassEntry(payloadStart);
+        }
+    }
+
+    public static final class BoundNestHostAttribute extends BoundAttribute<NestHostAttribute>
+            implements NestHostAttribute {
+        public BoundNestHostAttribute(ClassReader cf, AttributeMapper<NestHostAttribute> mapper, int pos) {
+            super(cf, mapper, pos);
+        }
+
+        @Override
+        public ClassEntry nestHost() {
+            return classReader.readClassEntry(payloadStart);
+        }
+    }
+
+    public static final class BoundSourceDebugExtensionAttribute extends BoundAttribute<SourceDebugExtensionAttribute>
+            implements SourceDebugExtensionAttribute {
+        public BoundSourceDebugExtensionAttribute(ClassReader cf, AttributeMapper<SourceDebugExtensionAttribute> mapper, int pos) {
+            super(cf, mapper, pos);
+        }
+    }
+
+    public static final class BoundConstantValueAttribute extends BoundAttribute<ConstantValueAttribute>
+            implements ConstantValueAttribute {
+        public BoundConstantValueAttribute(ClassReader cf, AttributeMapper<ConstantValueAttribute> mapper, int pos) {
+            super(cf, mapper, pos);
+        }
+
+        @Override
+        public ConstantValueEntry constant() {
+            return classReader.readEntry(payloadStart, ConstantValueEntry.class);
+        }
+
+    }
+
+    public static final class BoundModuleTargetAttribute extends BoundAttribute<ModuleTargetAttribute>
+            implements ModuleTargetAttribute {
+        public BoundModuleTargetAttribute(ClassReader cf, AttributeMapper<ModuleTargetAttribute> mapper, int pos) {
+            super(cf, mapper, pos);
+        }
+
+        @Override
+        public Utf8Entry targetPlatform() {
+            return classReader.readUtf8Entry(payloadStart);
+        }
+    }
+
+    public static final class BoundCompilationIDAttribute extends BoundAttribute<CompilationIDAttribute>
+            implements CompilationIDAttribute {
+        public BoundCompilationIDAttribute(ClassReader cf, AttributeMapper<CompilationIDAttribute> mapper, int pos) {
+            super(cf, mapper, pos);
+        }
+
+        @Override
+        public Utf8Entry compilationId() {
+            return classReader.readUtf8Entry(payloadStart);
+        }
+    }
+
+    public static final class BoundSourceIDAttribute extends BoundAttribute<SourceIDAttribute>
+            implements SourceIDAttribute {
+        public BoundSourceIDAttribute(ClassReader cf, AttributeMapper<SourceIDAttribute> mapper, int pos) {
+            super(cf, mapper, pos);
+        }
+
+        @Override
+        public Utf8Entry sourceId() {
+            return classReader.readUtf8Entry(payloadStart);
+        }
+    }
+
+    public static final class BoundModuleResolutionAttribute extends BoundAttribute<ModuleResolutionAttribute>
+            implements ModuleResolutionAttribute {
+        public BoundModuleResolutionAttribute(ClassReader cf, AttributeMapper<ModuleResolutionAttribute> mapper, int pos) {
+            super(cf, mapper, pos);
+        }
+
+        @Override
+        public int resolutionFlags() {
+            return classReader.readU2(payloadStart);
+        }
+    }
+
+    public static final class BoundExceptionsAttribute extends BoundAttribute<ExceptionsAttribute>
+            implements ExceptionsAttribute {
+        private List<ClassEntry> exceptions = null;
+
+        public BoundExceptionsAttribute(ClassReader cf, AttributeMapper<ExceptionsAttribute> mapper, int pos) {
+            super(cf, mapper, pos);
+        }
+
+        @Override
+        public List<ClassEntry> exceptions() {
+            if (exceptions == null) {
+                exceptions = readEntryList(payloadStart);
+            }
+            return exceptions;
+        }
+    }
+
+    public static final class BoundModuleAttribute extends BoundAttribute<ModuleAttribute>
+            implements ModuleAttribute {
+        private List<ModuleRequireInfo> requires = null;
+        private List<ModuleExportInfo> exports = null;
+        private List<ModuleOpenInfo> opens = null;
+        private List<ClassEntry> uses = null;
+        private List<ModuleProvideInfo> provides = null;
+
+        public BoundModuleAttribute(ClassReader cf, AttributeMapper<ModuleAttribute> mapper, int pos) {
+            super(cf, mapper, pos);
+        }
+
+        @Override
+        public ModuleEntry moduleName() {
+            return classReader.readModuleEntry(payloadStart);
+        }
+
+        @Override
+        public int moduleFlagsMask() {
+            return classReader.readU2(payloadStart + 2);
+        }
+
+        @Override
+        public Optional<Utf8Entry> moduleVersion() {
+            return Optional.ofNullable(classReader.readUtf8EntryOrNull(payloadStart + 4));
+        }
+
+        @Override
+        public List<ModuleRequireInfo> requires() {
+            if (requires == null) {
+                structure();
+            }
+            return requires;
+        }
+
+        @Override
+        public List<ModuleExportInfo> exports() {
+            if (exports == null) {
+                structure();
+            }
+            return exports;
+        }
+
+        @Override
+        public List<ModuleOpenInfo> opens() {
+            if (opens == null) {
+                structure();
+            }
+            return opens;
+        }
+
+        @Override
+        public List<ClassEntry> uses() {
+            if (uses == null) {
+                structure();
+            }
+            return uses;
+        }
+
+        @Override
+        public List<ModuleProvideInfo> provides() {
+            if (provides == null) {
+                structure();
+            }
+            return provides;
+        }
+
+        private void structure() {
+            int p = payloadStart + 8;
+
+            {
+                int cnt = classReader.readU2(payloadStart + 6);
+                ModuleRequireInfo[] elements = new ModuleRequireInfo[cnt];
+                int end = p + (cnt * 6);
+                for (int i = 0; p < end; p += 6, i++) {
+                    elements[i] = ModuleRequireInfo.of(classReader.readModuleEntry(p),
+                            classReader.readU2(p + 2),
+                            classReader.readEntryOrNull(p + 4, Utf8Entry.class));
+                }
+                requires = List.of(elements);
+            }
+
+            {
+                int cnt = classReader.readU2(p);
+                p += 2;
+                ModuleExportInfo[] elements = new ModuleExportInfo[cnt];
+                for (int i = 0; i < cnt; i++) {
+                    PackageEntry pe = classReader.readPackageEntry(p);
+                    int exportFlags = classReader.readU2(p + 2);
+                    p += 4;
+                    List<ModuleEntry> exportsTo = readEntryList(p);
+                    p += 2 + exportsTo.size() * 2;
+                    elements[i] = ModuleExportInfo.of(pe, exportFlags, exportsTo);
+                }
+                exports = List.of(elements);
+            }
+
+            {
+                int cnt = classReader.readU2(p);
+                p += 2;
+                ModuleOpenInfo[] elements = new ModuleOpenInfo[cnt];
+                for (int i = 0; i < cnt; i++) {
+                    PackageEntry po = classReader.readPackageEntry(p);
+                    int opensFlags = classReader.readU2(p + 2);
+                    p += 4;
+                    List<ModuleEntry> opensTo = readEntryList(p);
+                    p += 2 + opensTo.size() * 2;
+                    elements[i] = ModuleOpenInfo.of(po, opensFlags, opensTo);
+                }
+                opens = List.of(elements);
+            }
+
+            {
+                uses = readEntryList(p);
+                p += 2 + uses.size() * 2;
+                int cnt = classReader.readU2(p);
+                p += 2;
+                ModuleProvideInfo[] elements = new ModuleProvideInfo[cnt];
+                provides = new ArrayList<>(cnt);
+                for (int i = 0; i < cnt; i++) {
+                    ClassEntry c = classReader.readClassEntry(p);
+                    p += 2;
+                    List<ClassEntry> providesWith = readEntryList(p);
+                    p += 2 + providesWith.size() * 2;
+                    elements[i] = ModuleProvideInfo.of(c, providesWith);
+                }
+                provides = List.of(elements);
+            }
+        }
+    }
+
+    public static final class BoundModulePackagesAttribute extends BoundAttribute<ModulePackagesAttribute>
+            implements ModulePackagesAttribute {
+        private List<PackageEntry> packages = null;
+
+        public BoundModulePackagesAttribute(ClassReader cf, AttributeMapper<ModulePackagesAttribute> mapper, int pos) {
+            super(cf, mapper, pos);
+        }
+
+        @Override
+        public List<PackageEntry> packages() {
+            if (packages == null) {
+                packages = readEntryList(payloadStart);
+            }
+            return packages;
+        }
+    }
+
+    public static final class BoundNestMembersAttribute extends BoundAttribute<NestMembersAttribute>
+            implements NestMembersAttribute {
+
+        private List<ClassEntry> members = null;
+
+        public BoundNestMembersAttribute(ClassReader cf, AttributeMapper<NestMembersAttribute> mapper, int pos) {
+            super(cf, mapper, pos);
+        }
+
+        @Override
+        public List<ClassEntry> nestMembers() {
+            if (members == null) {
+                members = readEntryList(payloadStart);
+            }
+            return members;
+        }
+    }
+
+    public static final class BoundBootstrapMethodsAttribute extends BoundAttribute<BootstrapMethodsAttribute>
+            implements BootstrapMethodsAttribute {
+
+        private List<BootstrapMethodEntry> bootstraps = null;
+        private final int size;
+
+        public BoundBootstrapMethodsAttribute(ClassReader reader, AttributeMapper<BootstrapMethodsAttribute> mapper, int pos) {
+            super(reader, mapper, pos);
+            size = classReader.readU2(pos);
+        }
+
+        @Override
+        public int bootstrapMethodsSize() {
+            return size;
+        }
+
+        @Override
+        public List<BootstrapMethodEntry> bootstrapMethods() {
+            if (bootstraps == null) {
+                BootstrapMethodEntry[] bs = new BootstrapMethodEntry[size];
+                int p = payloadStart + 2;
+                for (int i = 0; i < size; ++i) {
+                    final AbstractPoolEntry.MethodHandleEntryImpl handle
+                            = (AbstractPoolEntry.MethodHandleEntryImpl) classReader.readMethodHandleEntry(p);
+                    final List<LoadableConstantEntry> args = readEntryList(p + 2);
+                    p += 4 + args.size() * 2;
+                    int hash = BootstrapMethodEntryImpl.computeHashCode(handle, args);
+                    bs[i] = new BootstrapMethodEntryImpl(classReader, i, hash, handle, args);
+                }
+                bootstraps = List.of(bs);
+            }
+            return bootstraps;
+        }
+    }
+
+    public static final class BoundInnerClassesAttribute extends BoundAttribute<InnerClassesAttribute>
+            implements InnerClassesAttribute {
+        private List<InnerClassInfo> classes;
+
+        public BoundInnerClassesAttribute(ClassReader cf, AttributeMapper<InnerClassesAttribute> mapper, int pos) {
+            super(cf, mapper, pos);
+        }
+
+        @Override
+        public List<InnerClassInfo> classes() {
+            if (classes == null) {
+                final int cnt = classReader.readU2(payloadStart);
+                int p = payloadStart + 2;
+                InnerClassInfo[] elements = new InnerClassInfo[cnt];
+                for (int i = 0; i < cnt; i++) {
+                    ClassEntry innerClass = classReader.readClassEntry(p);
+                    var outerClass = classReader.readEntryOrNull(p + 2, ClassEntry.class);
+                    var innerName = classReader.readEntryOrNull(p + 4, Utf8Entry.class);
+                    int flags = classReader.readU2(p + 6);
+                    p += 8;
+                    elements[i] = InnerClassInfo.of(innerClass, Optional.ofNullable(outerClass), Optional.ofNullable(innerName), flags);
+                }
+                classes = List.of(elements);
+            }
+            return classes;
+        }
+    }
+
+    public static final class BoundEnclosingMethodAttribute extends BoundAttribute<EnclosingMethodAttribute>
+            implements EnclosingMethodAttribute {
+        public BoundEnclosingMethodAttribute(ClassReader cf, AttributeMapper<EnclosingMethodAttribute> mapper, int pos) {
+            super(cf, mapper, pos);
+        }
+
+        @Override
+        public ClassEntry enclosingClass() {
+            return classReader.readClassEntry(payloadStart);
+        }
+
+        @Override
+        public Optional<NameAndTypeEntry> enclosingMethod() {
+            return Optional.ofNullable(classReader.readEntryOrNull(payloadStart + 2, NameAndTypeEntry.class));
+        }
+    }
+
+    public static final class BoundAnnotationDefaultAttr
+            extends BoundAttribute<AnnotationDefaultAttribute>
+            implements AnnotationDefaultAttribute {
+        private AnnotationValue annotationValue;
+
+        public BoundAnnotationDefaultAttr(ClassReader cf, AttributeMapper<AnnotationDefaultAttribute> mapper, int pos) {
+            super(cf, mapper, pos);
+        }
+
+        @Override
+        public AnnotationValue defaultValue() {
+            if (annotationValue == null)
+                annotationValue = AnnotationReader.readElementValue(classReader, payloadStart);
+            return annotationValue;
+        }
+    }
+
+    public static final class BoundRuntimeVisibleTypeAnnotationsAttribute extends BoundAttribute<RuntimeVisibleTypeAnnotationsAttribute>
+            implements RuntimeVisibleTypeAnnotationsAttribute {
+
+        private final LabelContext labelContext;
+
+        public BoundRuntimeVisibleTypeAnnotationsAttribute(AttributedElement enclosing, ClassReader cf, AttributeMapper<RuntimeVisibleTypeAnnotationsAttribute> mapper, int pos) {
+            super(cf, mapper, pos);
+            this.labelContext = (enclosing instanceof LabelContext lc) ? lc : null;
+        }
+
+        @Override
+        public List<TypeAnnotation> annotations() {
+            return AnnotationReader.readTypeAnnotations(classReader, payloadStart, labelContext);
+        }
+    }
+
+    public static final class BoundRuntimeInvisibleTypeAnnotationsAttribute
+            extends BoundAttribute<RuntimeInvisibleTypeAnnotationsAttribute>
+            implements RuntimeInvisibleTypeAnnotationsAttribute {
+        public BoundRuntimeInvisibleTypeAnnotationsAttribute(AttributedElement enclosing, ClassReader cf, AttributeMapper<RuntimeInvisibleTypeAnnotationsAttribute> mapper, int pos) {
+            super(cf, mapper, pos);
+            this.labelContext = (enclosing instanceof LabelContext lc) ? lc : null;
+        }
+
+        private final LabelContext labelContext;
+
+        @Override
+        public List<TypeAnnotation> annotations() {
+            return AnnotationReader.readTypeAnnotations(classReader, payloadStart, labelContext);
+        }
+    }
+
+    public static final class BoundRuntimeVisibleParameterAnnotationsAttribute
+            extends BoundAttribute<RuntimeVisibleParameterAnnotationsAttribute>
+            implements RuntimeVisibleParameterAnnotationsAttribute {
+
+        public BoundRuntimeVisibleParameterAnnotationsAttribute(ClassReader cf, AttributeMapper<RuntimeVisibleParameterAnnotationsAttribute> mapper, int pos) {
+            super(cf, mapper, pos);
+        }
+
+        @Override
+        public List<List<Annotation>> parameterAnnotations() {
+            return AnnotationReader.readParameterAnnotations(classReader, payloadStart);
+        }
+    }
+
+    public static final class BoundRuntimeInvisibleParameterAnnotationsAttribute
+            extends BoundAttribute<RuntimeInvisibleParameterAnnotationsAttribute>
+            implements RuntimeInvisibleParameterAnnotationsAttribute {
+
+        public BoundRuntimeInvisibleParameterAnnotationsAttribute(ClassReader cf, AttributeMapper<RuntimeInvisibleParameterAnnotationsAttribute> mapper, int pos) {
+            super(cf, mapper, pos);
+        }
+
+        @Override
+        public List<List<Annotation>> parameterAnnotations() {
+            return AnnotationReader.readParameterAnnotations(classReader, payloadStart);
+        }
+    }
+
+    public static final class BoundRuntimeInvisibleAnnotationsAttribute
+            extends BoundAttribute<RuntimeInvisibleAnnotationsAttribute>
+            implements RuntimeInvisibleAnnotationsAttribute {
+        private List<Annotation> inflated;
+
+        public BoundRuntimeInvisibleAnnotationsAttribute(ClassReader cf,
+                                                         int payloadStart) {
+            super(cf, Attributes.runtimeInvisibleAnnotations(), payloadStart);
+        }
+
+        @Override
+        public List<Annotation> annotations() {
+            if (inflated == null)
+                inflated = AnnotationReader.readAnnotations(classReader, payloadStart);
+            return inflated;
+        }
+    }
+
+    public static final class BoundRuntimeVisibleAnnotationsAttribute
+            extends BoundAttribute<RuntimeVisibleAnnotationsAttribute>
+            implements RuntimeVisibleAnnotationsAttribute {
+        private List<Annotation> inflated;
+
+        public BoundRuntimeVisibleAnnotationsAttribute(ClassReader cf,
+                                                       int payloadStart) {
+            super(cf, Attributes.runtimeVisibleAnnotations(), payloadStart);
+        }
+
+        @Override
+        public List<Annotation> annotations() {
+            if (inflated == null)
+                inflated = AnnotationReader.readAnnotations(classReader, payloadStart);
+            return inflated;
+        }
+    }
+
+    public static final class BoundPermittedSubclassesAttribute extends BoundAttribute<PermittedSubclassesAttribute>
+            implements PermittedSubclassesAttribute {
+        private List<ClassEntry> permittedSubclasses = null;
+
+        public BoundPermittedSubclassesAttribute(ClassReader cf, AttributeMapper<PermittedSubclassesAttribute> mapper, int pos) {
+            super(cf, mapper, pos);
+        }
+
+        @Override
+        public List<ClassEntry> permittedSubclasses() {
+            if (permittedSubclasses == null) {
+                permittedSubclasses = readEntryList(payloadStart);
+            }
+            return permittedSubclasses;
+        }
+    }
+
+    public abstract static sealed class BoundCodeAttribute
+            extends BoundAttribute<CodeAttribute>
+            implements CodeAttribute
+            permits CodeImpl {
+        protected final int codeStart;
+        protected final int codeLength;
+        protected final int codeEnd;
+        protected final int attributePos;
+        protected final int exceptionHandlerPos;
+        protected final int exceptionHandlerCnt;
+        protected final MethodModel enclosingMethod;
+
+        public BoundCodeAttribute(AttributedElement enclosing,
+                                  ClassReader reader,
+                                  AttributeMapper<CodeAttribute> mapper,
+                                  int payloadStart) {
+            super(reader, mapper, payloadStart);
+            this.codeLength = classReader.readInt(payloadStart + 4);
+            this.enclosingMethod = (MethodModel) enclosing;
+            this.codeStart = payloadStart + 8;
+            this.codeEnd = codeStart + codeLength;
+            this.exceptionHandlerPos = codeEnd;
+            this.exceptionHandlerCnt = classReader.readU2(exceptionHandlerPos);
+            this.attributePos = exceptionHandlerPos + 2 + exceptionHandlerCnt * 8;
+        }
+
+        // CodeAttribute
+
+        @Override
+        public int maxStack() {
+            return classReader.readU2(payloadStart);
+        }
+
+        @Override
+        public int maxLocals() {
+            return classReader.readU2(payloadStart + 2);
+        }
+
+        @Override
+        public int codeLength() {
+            return codeLength;
+        }
+
+        @Override
+        public byte[] codeArray() {
+            return classReader.readBytes(payloadStart + 8, codeLength());
+        }
+    }
+
+    /**
+     * {@return the attribute mapper for a standard attribute}
+     *
+     * @param name the name of the attribute to find
+     */
+    public static AttributeMapper<?> standardAttribute(Utf8Entry name) {
+        // critical bootstrap path, so no lambdas nor method handles here
+        return switch (name.hashCode()) {
+            case 0x46699ff2 ->
+                name.equalsString(NAME_ANNOTATION_DEFAULT) ? annotationDefault() : null;
+            case 0x5208e184 ->
+                name.equalsString(NAME_BOOTSTRAP_METHODS) ? bootstrapMethods() : null;
+            case 0xcb60907a ->
+                name.equalsString(NAME_CHARACTER_RANGE_TABLE) ? characterRangeTable() : null;
+            case 0x4020220d ->
+                name.equalsString(NAME_CODE) ? code() : null;
+            case 0xc20dd1fe ->
+                name.equalsString(NAME_COMPILATION_ID) ? compilationId() : null;
+            case 0xcab1940d ->
+                name.equalsString(NAME_CONSTANT_VALUE) ? constantValue() : null;
+            case 0x558641d3 ->
+                name.equalsString(NAME_DEPRECATED) ? deprecated() : null;
+            case 0x51d443cd ->
+                name.equalsString(NAME_ENCLOSING_METHOD) ? enclosingMethod() : null;
+            case 0x687c1624 ->
+                name.equalsString(NAME_EXCEPTIONS) ? exceptions() : null;
+            case 0x7adb2910 ->
+                name.equalsString(NAME_INNER_CLASSES) ? innerClasses() : null;
+            case 0x653f0551 ->
+                name.equalsString(NAME_LINE_NUMBER_TABLE) ? lineNumberTable() : null;
+            case 0x64c75927 ->
+                name.equalsString(NAME_LOCAL_VARIABLE_TABLE) ? localVariableTable() : null;
+            case 0x6697f98d ->
+                name.equalsString(NAME_LOCAL_VARIABLE_TYPE_TABLE) ? localVariableTypeTable() : null;
+            case 0xdbb0cdcb ->
+                name.equalsString(NAME_METHOD_PARAMETERS) ? methodParameters() : null;
+            case 0xc9b0928c ->
+                name.equalsString(NAME_MODULE) ? module() : null;
+            case 0x41cd27e8 ->
+                name.equalsString(NAME_MODULE_HASHES) ? moduleHashes() : null;
+            case 0x7deb0a13 ->
+                name.equalsString(NAME_MODULE_MAIN_CLASS) ? moduleMainClass() : null;
+            case 0x6706ff99 ->
+                name.equalsString(NAME_MODULE_PACKAGES) ? modulePackages() : null;
+            case 0x60272858 ->
+                name.equalsString(NAME_MODULE_RESOLUTION) ? moduleResolution() : null;
+            case 0x5646d73d ->
+                name.equalsString(NAME_MODULE_TARGET) ? moduleTarget() : null;
+            case 0x50336c40 ->
+                name.equalsString(NAME_NEST_HOST) ? nestHost() : null;
+            case 0x4735ab81 ->
+                name.equalsString(NAME_NEST_MEMBERS) ? nestMembers() : null;
+            case 0x7100d9fe ->
+                name.equalsString(NAME_PERMITTED_SUBCLASSES) ? permittedSubclasses() : null;
+            case 0xd1ab5871 ->
+                name.equalsString(NAME_RECORD) ? record() : null;
+            case 0x7588550f ->
+                name.equalsString(NAME_RUNTIME_INVISIBLE_ANNOTATIONS) ? runtimeInvisibleAnnotations() : null;
+            case 0xcc74da30 ->
+                name.equalsString(NAME_RUNTIME_INVISIBLE_PARAMETER_ANNOTATIONS) ? runtimeInvisibleParameterAnnotations() : null;
+            case 0xf67697f5 ->
+                name.equalsString(NAME_RUNTIME_INVISIBLE_TYPE_ANNOTATIONS) ? runtimeInvisibleTypeAnnotations() : null;
+            case 0xe0837d2a ->
+                name.equalsString(NAME_RUNTIME_VISIBLE_ANNOTATIONS) ? runtimeVisibleAnnotations() : null;
+            case 0xc945a075 ->
+                name.equalsString(NAME_RUNTIME_VISIBLE_PARAMETER_ANNOTATIONS) ? runtimeVisibleParameterAnnotations() : null;
+            case 0x611a3a90 ->
+                name.equalsString(NAME_RUNTIME_VISIBLE_TYPE_ANNOTATIONS) ? runtimeVisibleTypeAnnotations() : null;
+            case 0xf76fb898 ->
+                name.equalsString(NAME_SIGNATURE) ? signature() : null;
+            case 0x6b41b047 ->
+                name.equalsString(NAME_SOURCE_DEBUG_EXTENSION) ? sourceDebugExtension() : null;
+            case 0x748c2857 ->
+                name.equalsString(NAME_SOURCE_FILE) ? sourceFile() : null;
+            case 0x6bf13a96 ->
+                name.equalsString(NAME_SOURCE_ID) ? sourceId() : null;
+            case 0xfa85ee5a ->
+                name.equalsString(NAME_STACK_MAP_TABLE) ? stackMapTable() : null;
+            case 0xf2670725 ->
+                name.equalsString(NAME_SYNTHETIC) ? synthetic() : null;
+            default -> null;
+        };
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/classfile/impl/BoundCharacterRange.class b/tests/test_data/std/jdk/internal/classfile/impl/BoundCharacterRange.class
new file mode 100644
index 0000000000000000000000000000000000000000..9b3fcf6a149850a71e950a7caa81dded895af4d5
GIT binary patch
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/classfile/impl/BoundCharacterRange.java b/tests/test_data/std/jdk/internal/classfile/impl/BoundCharacterRange.java
new file mode 100644
index 00000000..374ba5bc
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/classfile/impl/BoundCharacterRange.java
@@ -0,0 +1,86 @@
+/*
+ * Copyright (c) 2022, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package jdk.internal.classfile.impl;
+
+import java.lang.classfile.Label;
+import java.lang.classfile.instruction.CharacterRange;
+
+public final class BoundCharacterRange
+        extends AbstractElement
+        implements CharacterRange {
+
+    private final CodeImpl code;
+    private final int offset;
+
+    public BoundCharacterRange(CodeImpl code, int offset) {
+        this.code = code;
+        this.offset = offset;
+    }
+
+    int startPc() {
+        return code.classReader.readU2(offset);
+    }
+
+    int endPc() {
+        return code.classReader.readU2(offset + 2);
+    }
+
+    @Override
+    public int characterRangeStart() {
+        return code.classReader.readInt(offset + 4);
+    }
+
+    @Override
+    public int characterRangeEnd() {
+        return code.classReader.readInt(offset + 8);
+    }
+
+    @Override
+    public int flags() {
+        return code.classReader.readU2(offset + 12);
+    }
+
+    @Override
+    public Label startScope() {
+        return code.getLabel(startPc());
+    }
+
+    @Override
+    public Label endScope() {
+        return code.getLabel(endPc() + 1);
+    }
+
+    @Override
+    public void writeTo(DirectCodeBuilder builder) {
+        builder.addCharacterRange(this);
+    }
+
+    @Override
+    public String toString() {
+        return String.format("CharacterRange[startScope=%s, endScope=%s, characterRangeStart=%s, characterRangeEnd=%s, flags=%d]",
+                startScope(), endScope(), characterRangeStart(), characterRangeEnd(), flags());
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/classfile/impl/BoundLocalVariable.class b/tests/test_data/std/jdk/internal/classfile/impl/BoundLocalVariable.class
new file mode 100644
index 0000000000000000000000000000000000000000..b8cabb950d7d2247d1f68fd1e7d63eb10966b4d9
GIT binary patch
literal 1804
zcma)6X;afs6g`in!4g(kTu|!*v``43vRFV_wOZjru`>+ghcrzwnC3CbD-QokzbHDR
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z%A4*%FtCH6l2k4`#0Se`m}@!0&7+v2IEEi*qNQhb_(?=wEP5u1$kGf^S^n&KDbH<&
zSZH)EN4GW^6ioT#TEaZw!Bn)^SWR6`4N0+mcWMT$CEI3ahAzP`+aQ|dW!ErwX+1KG
zHj6SVD@BdiMH{vaD@f78?F5s1mY!?$mPR}M0A*@=>>Jn@I<{e*o^mMzlVljjb2`NW
zGrYhCy^#YpX?HXKw2d9IrV2x?z-sg_zjaQ1h4PsW0jP`$Bz-_>D%k{p47+$qH<Hs5
z{mXAX<lOTe{R|fvX#|<C1L>)PyrP5xkaY?vGl)zR%2;DwixhatM;HmLs(D558gG08
z84Opja=vIpeDFc!CmtQP6Xb+XEPL2N=fnkOvWGI)fNu5zj~n@>>i8zBeBTnoHthWc
Ds>jjO

literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/classfile/impl/BoundLocalVariable.java b/tests/test_data/std/jdk/internal/classfile/impl/BoundLocalVariable.java
new file mode 100644
index 00000000..a5953c86
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/classfile/impl/BoundLocalVariable.java
@@ -0,0 +1,61 @@
+/*
+ * Copyright (c) 2022, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package jdk.internal.classfile.impl;
+
+import java.lang.constant.ClassDesc;
+import java.lang.classfile.attribute.LocalVariableInfo;
+import java.lang.classfile.constantpool.Utf8Entry;
+import java.lang.classfile.instruction.LocalVariable;
+
+public final class BoundLocalVariable
+        extends AbstractBoundLocalVariable
+        implements LocalVariableInfo,
+                   LocalVariable {
+
+    public BoundLocalVariable(CodeImpl code, int offset) {
+        super(code, offset);
+    }
+
+    @Override
+    public Utf8Entry type() {
+        return secondaryEntry();
+    }
+
+    @Override
+    public ClassDesc typeSymbol() {
+        return ClassDesc.ofDescriptor(type().stringValue());
+    }
+
+    @Override
+    public void writeTo(DirectCodeBuilder writer) {
+        writer.addLocalVariable(this);
+    }
+
+    @Override
+    public String toString() {
+        return String.format("LocalVariable[name=%s, slot=%d, type=%s]", name().stringValue(), slot(), type().stringValue());
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/classfile/impl/BoundLocalVariableType.class b/tests/test_data/std/jdk/internal/classfile/impl/BoundLocalVariableType.class
new file mode 100644
index 0000000000000000000000000000000000000000..53e4c9e8f21339e9565f206a8bfcab8cb5c95100
GIT binary patch
literal 1617
zcmaJ>Yg5xe6g^8zQ%d9|;sX?XfNd#+mk1V6o=#>u@}bxnhVjF;O=~bsm}G;)ztS&?
z&gc*DM>*bYY9F+d=}fxW+<VU1bMM_he}Dc4u#dM1^dX`ks-hn;hV}FEC(X2l;o98N
zN*4FLifI{|S-Y^b-J&O4UJ`qbZ<ljUiCYEkn!IQk46!ZKHpLD@I++W@*muf?PGDI*
zRY)L?0R;&agHRb(!t%N~Pp&SAcgQnJj$P*N)uAoiD~82nDtFE=xn^;@+I9kp@&vcV
zh2vP-dr{e_$7d55!mxr76{8qqSP0W_V7f+0$P?`Ord2jvhH+l*bRtl-PA2rwV3Gva
zFA3AJwGRJeRyI|LW1L~R>&uzVYsU7hmznV_M{LiQX<=4vE__#Re^4;NFw!DCE}oN4
z>Fzxh_ocN_i7<#sOeuJ%;t{5)P_2YkoqM~)Fi65pyISCuPo|G|c$}|)A}8Z`tl|lt
z5}y>x5J{%=1ZFX(;JJz<QVgRlR-M|cDos=_CG2s9VIrxwSFaIKhn`oFkw+P59zB6Y
zXbP58EMuj^fIty7WyNu8oP=z)*Q25LtgS?WW7&4@MwEgzhSiqnmQ`HPxr@Fqx=X3s
z6-U83)v{M&Xcv%ovcVXJbEa*)^J_)JJqbo^tg|tK&8YZjdJJo!L)UwFvcy%YbIpZj
zH%FEXbt)ClAVZl>W&7-!!Z>kga>Hl7Yi_9339Ft?<<~;lyOSB>!uem~MBee;l5s?r
z6vJfigD%P{P?N;zuIs}pUeMJS1(P=(JzvtBjtKn#B|Sg&9qcPD`>;Vzc|C$UIEFcF
z(rP9M!z*OzjS{ehZ32<29lWM!Cfl?DtI@yw)}Q_c<qItWP{|6U>wq$p0vdn}Z?H={
zQqvAaOY+z}W#76fNu!*lI>JN{)sz&&9$oB`_yE%ltO7+#p3K<o*e~2UjS%GBA9%o!
hKaJ9Q<{HoPr&4A**uBQWO}%SvdNWPEhlJXPqkl9!sbc^D

literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/classfile/impl/BoundLocalVariableType.java b/tests/test_data/std/jdk/internal/classfile/impl/BoundLocalVariableType.java
new file mode 100644
index 00000000..9fff650a
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/classfile/impl/BoundLocalVariableType.java
@@ -0,0 +1,54 @@
+/*
+ * Copyright (c) 2022, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package jdk.internal.classfile.impl;
+
+import java.lang.classfile.attribute.LocalVariableTypeInfo;
+import java.lang.classfile.constantpool.Utf8Entry;
+import java.lang.classfile.instruction.LocalVariableType;
+
+public final class BoundLocalVariableType
+        extends AbstractBoundLocalVariable
+        implements LocalVariableTypeInfo,
+                   LocalVariableType {
+
+    public BoundLocalVariableType(CodeImpl code, int offset) {
+        super(code, offset);
+    }
+
+    @Override
+    public Utf8Entry signature() {
+        return secondaryEntry();
+    }
+
+    @Override
+    public void writeTo(DirectCodeBuilder writer) {
+        writer.addLocalVariableType(this);
+    }
+
+    @Override
+    public String toString() {
+        return String.format("LocalVariableType[name=%s, slot=%d, signature=%s]", name().stringValue(), slot(), signature().stringValue());
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/classfile/impl/BoundRecordComponentInfo.class b/tests/test_data/std/jdk/internal/classfile/impl/BoundRecordComponentInfo.class
new file mode 100644
index 0000000000000000000000000000000000000000..7e838a47d2683750d6540694f420dc0171161428
GIT binary patch
literal 1555
zcma)6ZBNrs6n^eDC>v#rDX2JPsMD<|6<;Q@g+v!fmduxc@|mvfu+X(jdu#MxX~LrT
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/classfile/impl/BoundRecordComponentInfo.java b/tests/test_data/std/jdk/internal/classfile/impl/BoundRecordComponentInfo.java
new file mode 100644
index 00000000..d2e0dc07
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/classfile/impl/BoundRecordComponentInfo.java
@@ -0,0 +1,64 @@
+/*
+ * Copyright (c) 2022, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package jdk.internal.classfile.impl;
+
+import java.util.List;
+
+import java.lang.classfile.Attribute;
+import java.lang.classfile.ClassReader;
+import java.lang.classfile.attribute.RecordComponentInfo;
+import java.lang.classfile.constantpool.Utf8Entry;
+
+public final class BoundRecordComponentInfo
+        implements RecordComponentInfo {
+
+    private final ClassReader reader;
+    private final int startPos, attributesPos;
+    private List<Attribute<?>> attributes;
+
+    public BoundRecordComponentInfo(ClassReader reader, int startPos) {
+        this.reader = reader;
+        this.startPos = startPos;
+        attributesPos = startPos + 4;
+    }
+
+    @Override
+    public Utf8Entry name() {
+        return reader.readUtf8Entry(startPos);
+    }
+
+    @Override
+    public Utf8Entry descriptor() {
+        return reader.readUtf8Entry(startPos + 2);
+    }
+
+    @Override
+    public List<Attribute<?>> attributes() {
+        if (attributes == null) {
+            attributes = BoundAttribute.readAttributes(null, reader, attributesPos, reader.customAttributes());
+        }
+        return attributes;
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/classfile/impl/BufWriterImpl.class b/tests/test_data/std/jdk/internal/classfile/impl/BufWriterImpl.class
new file mode 100644
index 0000000000000000000000000000000000000000..3938c931cc710fd15de956755f9b12b5c14af323
GIT binary patch
literal 6886
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/classfile/impl/BufWriterImpl.java b/tests/test_data/std/jdk/internal/classfile/impl/BufWriterImpl.java
new file mode 100644
index 00000000..87161588
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/classfile/impl/BufWriterImpl.java
@@ -0,0 +1,217 @@
+/*
+ * Copyright (c) 2022, 2024, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package jdk.internal.classfile.impl;
+
+
+import java.nio.ByteBuffer;
+import java.util.Arrays;
+import java.util.List;
+
+import java.lang.classfile.BufWriter;
+import java.lang.classfile.WritableElement;
+import java.lang.classfile.constantpool.ClassEntry;
+import java.lang.classfile.constantpool.ConstantPool;
+import java.lang.classfile.constantpool.ConstantPoolBuilder;
+import java.lang.classfile.constantpool.PoolEntry;
+
+public final class BufWriterImpl implements BufWriter {
+
+    private final ConstantPoolBuilder constantPool;
+    private final ClassFileImpl context;
+    private LabelContext labelContext;
+    private final ClassEntry thisClass;
+    private final int majorVersion;
+    byte[] elems;
+    int offset = 0;
+
+    public BufWriterImpl(ConstantPoolBuilder constantPool, ClassFileImpl context) {
+        this(constantPool, context, 64, null, 0);
+    }
+
+    public BufWriterImpl(ConstantPoolBuilder constantPool, ClassFileImpl context, int initialSize) {
+        this(constantPool, context, initialSize, null, 0);
+    }
+
+    public BufWriterImpl(ConstantPoolBuilder constantPool, ClassFileImpl context, int initialSize, ClassEntry thisClass, int majorVersion) {
+        this.constantPool = constantPool;
+        this.context = context;
+        elems = new byte[initialSize];
+        this.thisClass = thisClass;
+        this.majorVersion = majorVersion;
+    }
+
+    @Override
+    public ConstantPoolBuilder constantPool() {
+        return constantPool;
+    }
+
+    public LabelContext labelContext() {
+        return labelContext;
+    }
+
+    public void setLabelContext(LabelContext labelContext) {
+        this.labelContext = labelContext;
+    }
+    @Override
+    public boolean canWriteDirect(ConstantPool other) {
+        return constantPool.canWriteDirect(other);
+    }
+
+    public ClassEntry thisClass() {
+        return thisClass;
+    }
+
+    public int getMajorVersion() {
+        return majorVersion;
+    }
+
+    public ClassFileImpl context() {
+        return context;
+    }
+
+    @Override
+    public void writeU1(int x) {
+        writeIntBytes(1, x);
+    }
+
+    @Override
+    public void writeU2(int x) {
+        writeIntBytes(2, x);
+    }
+
+    @Override
+    public void writeInt(int x) {
+        writeIntBytes(4, x);
+    }
+
+    @Override
+    public void writeFloat(float x) {
+        writeInt(Float.floatToIntBits(x));
+    }
+
+    @Override
+    public void writeLong(long x) {
+        writeIntBytes(8, x);
+    }
+
+    @Override
+    public void writeDouble(double x) {
+        writeLong(Double.doubleToLongBits(x));
+    }
+
+    @Override
+    public void writeBytes(byte[] arr) {
+        writeBytes(arr, 0, arr.length);
+    }
+
+    @Override
+    public void writeBytes(BufWriter other) {
+        BufWriterImpl o = (BufWriterImpl) other;
+        writeBytes(o.elems, 0, o.offset);
+    }
+
+    @Override
+    public void writeBytes(byte[] arr, int start, int length) {
+        reserveSpace(length);
+        System.arraycopy(arr, start, elems, offset, length);
+        offset += length;
+    }
+
+    @Override
+    public void patchInt(int offset, int size, int value) {
+        int prevOffset = this.offset;
+        this.offset = offset;
+        writeIntBytes(size, value);
+        this.offset = prevOffset;
+    }
+
+    @Override
+    public void writeIntBytes(int intSize, long intValue) {
+        reserveSpace(intSize);
+        for (int i = 0; i < intSize; i++) {
+            elems[offset++] = (byte) ((intValue >> 8 * (intSize - i - 1)) & 0xFF);
+        }
+    }
+
+    @Override
+    public void reserveSpace(int freeBytes) {
+        if (offset + freeBytes > elems.length) {
+            int newsize = elems.length * 2;
+            while (offset + freeBytes > newsize) {
+                newsize *= 2;
+            }
+            elems = Arrays.copyOf(elems, newsize);
+        }
+    }
+
+    @Override
+    public int size() {
+        return offset;
+    }
+
+    public ByteBuffer asByteBuffer() {
+        return ByteBuffer.wrap(elems, 0, offset).slice();
+    }
+
+    @Override
+    public void copyTo(byte[] array, int bufferOffset) {
+        System.arraycopy(elems, 0, array, bufferOffset, size());
+    }
+
+    // writeIndex methods ensure that any CP info written
+    // is relative to the correct constant pool
+
+    @Override
+    public void writeIndex(PoolEntry entry) {
+        int idx = AbstractPoolEntry.maybeClone(constantPool, entry).index();
+        if (idx < 1 || idx > Character.MAX_VALUE)
+            throw new IllegalArgumentException(idx + " is not a valid index. Entry: " + entry);
+        writeU2(idx);
+    }
+
+    @Override
+    public void writeIndexOrZero(PoolEntry entry) {
+        if (entry == null || entry.index() == 0)
+            writeU2(0);
+        else
+            writeIndex(entry);
+    }
+
+    @Override
+    public<T extends WritableElement<?>> void writeList(List<T> list) {
+        writeU2(list.size());
+        for (T t : list) {
+            t.writeTo(this);
+        }
+    }
+
+    @Override
+    public void writeListIndices(List<? extends PoolEntry> list) {
+        writeU2(list.size());
+        for (PoolEntry info : list) {
+            writeIndex(info);
+        }
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/classfile/impl/BufferedCodeBuilder$Model$1.class b/tests/test_data/std/jdk/internal/classfile/impl/BufferedCodeBuilder$Model$1.class
new file mode 100644
index 0000000000000000000000000000000000000000..2331c43d7c86897151b699ea9cff8b9d5c607e36
GIT binary patch
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/classfile/impl/BufferedCodeBuilder$Model.class b/tests/test_data/std/jdk/internal/classfile/impl/BufferedCodeBuilder$Model.class
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HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/classfile/impl/BufferedCodeBuilder.java b/tests/test_data/std/jdk/internal/classfile/impl/BufferedCodeBuilder.java
new file mode 100644
index 00000000..8603c77a
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/classfile/impl/BufferedCodeBuilder.java
@@ -0,0 +1,218 @@
+/*
+ * Copyright (c) 2022, 2024, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package jdk.internal.classfile.impl;
+
+import java.lang.classfile.BufWriter;
+import java.lang.classfile.CodeBuilder;
+import java.lang.classfile.CodeElement;
+import java.lang.classfile.CodeModel;
+import java.lang.classfile.TypeKind;
+import java.lang.classfile.constantpool.ConstantPoolBuilder;
+import java.lang.classfile.Label;
+import java.lang.classfile.MethodModel;
+import java.lang.classfile.instruction.ExceptionCatch;
+import java.lang.classfile.instruction.IncrementInstruction;
+import java.lang.classfile.instruction.LoadInstruction;
+import java.lang.classfile.instruction.StoreInstruction;
+
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Optional;
+import java.util.function.Consumer;
+
+public final class BufferedCodeBuilder
+        implements TerminalCodeBuilder {
+    private final SplitConstantPool constantPool;
+    private final ClassFileImpl context;
+    private final List<CodeElement> elements = new ArrayList<>();
+    private final LabelImpl startLabel, endLabel;
+    private final CodeModel original;
+    private final MethodInfo methodInfo;
+    private boolean finished;
+    private int maxLocals;
+
+    public BufferedCodeBuilder(MethodInfo methodInfo,
+                               SplitConstantPool constantPool,
+                               ClassFileImpl context,
+                               CodeModel original) {
+        this.constantPool = constantPool;
+        this.context = context;
+        this.startLabel = new LabelImpl(this, -1);
+        this.endLabel = new LabelImpl(this, -1);
+        this.original = original;
+        this.methodInfo = methodInfo;
+        this.maxLocals = Util.maxLocals(methodInfo.methodFlags(), methodInfo.methodTypeSymbol());
+        if (original != null)
+            this.maxLocals = Math.max(this.maxLocals, original.maxLocals());
+
+        elements.add(startLabel);
+    }
+
+    @Override
+    public Optional<CodeModel> original() {
+        return Optional.ofNullable(original);
+    }
+
+    @Override
+    public Label newLabel() {
+        return new LabelImpl(this, -1);
+    }
+
+    @Override
+    public Label startLabel() {
+        return startLabel;
+    }
+
+    @Override
+    public Label endLabel() {
+        return endLabel;
+    }
+
+    @Override
+    public int receiverSlot() {
+        return methodInfo.receiverSlot();
+    }
+
+    @Override
+    public int parameterSlot(int paramNo) {
+        return methodInfo.parameterSlot(paramNo);
+    }
+
+    public int curTopLocal() {
+        return maxLocals;
+    }
+
+    @Override
+    public int allocateLocal(TypeKind typeKind) {
+        int retVal = maxLocals;
+        maxLocals += typeKind.slotSize();
+        return retVal;
+    }
+
+    @Override
+    public Label getLabel(int bci) {
+        throw new UnsupportedOperationException("Lookup by BCI not supported by BufferedCodeBuilder");
+    }
+
+    @Override
+    public int labelToBci(Label label) {
+        throw new UnsupportedOperationException("Label mapping not supported by BufferedCodeBuilder");
+    }
+
+    @Override
+    public void setLabelTarget(Label label, int bci) {
+        throw new UnsupportedOperationException("Label mapping not supported by BufferedCodeBuilder");
+    }
+
+    @Override
+    public ConstantPoolBuilder constantPool() {
+        return constantPool;
+    }
+
+    @Override
+    public CodeBuilder with(CodeElement element) {
+        if (finished)
+            throw new IllegalStateException("Can't add elements after traversal");
+        elements.add(element);
+        return this;
+    }
+
+    @Override
+    public String toString() {
+        return String.format("CodeModel[id=%d]", System.identityHashCode(this));
+    }
+
+    public BufferedCodeBuilder run(Consumer<? super CodeBuilder> handler) {
+        handler.accept(this);
+        return this;
+    }
+
+    public CodeModel toModel() {
+        if (!finished) {
+            elements.add(endLabel);
+            finished = true;
+        }
+        return new Model();
+    }
+
+    public final class Model
+            extends AbstractUnboundModel<CodeElement>
+            implements CodeModel {
+
+        private Model() {
+            super(elements);
+        }
+
+        @Override
+        public List<ExceptionCatch> exceptionHandlers() {
+            return elements.stream()
+                           .filter(x -> x instanceof ExceptionCatch)
+                           .map(x -> (ExceptionCatch) x)
+                           .toList();
+        }
+
+        @Override
+        public int maxLocals() {
+            for (CodeElement element : elements) {
+                if (element instanceof LoadInstruction i)
+                    maxLocals = Math.max(maxLocals, i.slot() + i.typeKind().slotSize());
+                else if (element instanceof StoreInstruction i)
+                    maxLocals = Math.max(maxLocals, i.slot() + i.typeKind().slotSize());
+                else if (element instanceof IncrementInstruction i)
+                    maxLocals = Math.max(maxLocals, i.slot() + 1);
+            }
+            return maxLocals;
+        }
+
+        @Override
+        public int maxStack() {
+            throw new UnsupportedOperationException("nyi");
+        }
+
+        @Override
+        public Optional<MethodModel> parent() {
+            return Optional.empty();
+        }
+
+        @Override
+        public void writeTo(DirectMethodBuilder builder) {
+            builder.withCode(new Consumer<>() {
+                @Override
+                public void accept(CodeBuilder cb) {
+                    forEachElement(cb);
+                }
+            });
+        }
+
+        public void writeTo(BufWriter buf) {
+            DirectCodeBuilder.build(methodInfo, cb -> elements.forEach(cb), constantPool, context, null).writeTo(buf);
+        }
+
+        @Override
+        public String toString() {
+            return String.format("CodeModel[id=%s]", Integer.toHexString(System.identityHashCode(this)));
+        }
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/classfile/impl/BufferedFieldBuilder$Model$1.class b/tests/test_data/std/jdk/internal/classfile/impl/BufferedFieldBuilder$Model$1.class
new file mode 100644
index 0000000000000000000000000000000000000000..49ddbe60875774034f2c5259b36417f4f3b24d73
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literal 0
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diff --git a/tests/test_data/std/jdk/internal/classfile/impl/BufferedFieldBuilder$Model.class b/tests/test_data/std/jdk/internal/classfile/impl/BufferedFieldBuilder$Model.class
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/classfile/impl/BufferedFieldBuilder.java b/tests/test_data/std/jdk/internal/classfile/impl/BufferedFieldBuilder.java
new file mode 100644
index 00000000..2ba7ef14
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/classfile/impl/BufferedFieldBuilder.java
@@ -0,0 +1,135 @@
+/*
+ * Copyright (c) 2022, 2023, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package jdk.internal.classfile.impl;
+
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Optional;
+import java.util.function.Consumer;
+
+import java.lang.classfile.*;
+import java.lang.classfile.constantpool.ConstantPoolBuilder;
+import java.lang.classfile.constantpool.Utf8Entry;
+
+public final class BufferedFieldBuilder
+        implements TerminalFieldBuilder {
+    private final SplitConstantPool constantPool;
+    private final ClassFileImpl context;
+    private final Utf8Entry name;
+    private final Utf8Entry desc;
+    private final List<FieldElement> elements = new ArrayList<>();
+    private AccessFlags flags;
+    private final FieldModel original;
+
+    public BufferedFieldBuilder(SplitConstantPool constantPool,
+                                ClassFileImpl context,
+                                Utf8Entry name,
+                                Utf8Entry type,
+                                FieldModel original) {
+        this.constantPool = constantPool;
+        this.context = context;
+        this.name = name;
+        this.desc = type;
+        this.flags = AccessFlags.ofField();
+        this.original = original;
+    }
+
+    @Override
+    public ConstantPoolBuilder constantPool() {
+        return constantPool;
+    }
+
+    @Override
+    public Optional<FieldModel> original() {
+        return Optional.ofNullable(original);
+    }
+
+    @Override
+    public FieldBuilder with(FieldElement element) {
+        elements.add(element);
+        if (element instanceof AccessFlags f) this.flags = f;
+        return this;
+    }
+
+    public BufferedFieldBuilder run(Consumer<? super FieldBuilder> handler) {
+        handler.accept(this);
+        return this;
+    }
+
+    public FieldModel toModel() {
+        return new Model();
+    }
+
+    public final class Model
+            extends AbstractUnboundModel<FieldElement>
+            implements FieldModel {
+        public Model() {
+            super(elements);
+        }
+
+        @Override
+        public Optional<ClassModel> parent() {
+            FieldModel fm = original().orElse(null);
+            return fm == null? Optional.empty() : fm.parent();
+        }
+
+        @Override
+        public AccessFlags flags() {
+            return flags;
+        }
+
+        @Override
+        public Utf8Entry fieldName() {
+            return name;
+        }
+
+        @Override
+        public Utf8Entry fieldType() {
+            return desc;
+        }
+
+        @Override
+        public void writeTo(DirectClassBuilder builder) {
+            builder.withField(name, desc, new Consumer<FieldBuilder>() {
+                @Override
+                public void accept(FieldBuilder fieldBuilder) {
+                    elements.forEach(fieldBuilder);
+                }
+            });
+        }
+
+        @Override
+        public void writeTo(BufWriter buf) {
+            DirectFieldBuilder fb = new DirectFieldBuilder(constantPool, context, name, desc, null);
+            elements.forEach(fb);
+            fb.writeTo(buf);
+        }
+
+        @Override
+        public String toString() {
+            return String.format("FieldModel[fieldName=%s, fieldType=%s, flags=%d]", name.stringValue(), desc.stringValue(), flags.flagsMask());
+        }
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/classfile/impl/BufferedMethodBuilder$Model$1.class b/tests/test_data/std/jdk/internal/classfile/impl/BufferedMethodBuilder$Model$1.class
new file mode 100644
index 0000000000000000000000000000000000000000..0d00ee4c2e2a724473f05e301146201d526e5850
GIT binary patch
literal 1359
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DYr$d>

literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/classfile/impl/BufferedMethodBuilder$Model.class b/tests/test_data/std/jdk/internal/classfile/impl/BufferedMethodBuilder$Model.class
new file mode 100644
index 0000000000000000000000000000000000000000..186b745823cac6233776261fce00b9eb3838096d
GIT binary patch
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/classfile/impl/BufferedMethodBuilder.class b/tests/test_data/std/jdk/internal/classfile/impl/BufferedMethodBuilder.class
new file mode 100644
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GIT binary patch
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/classfile/impl/BufferedMethodBuilder.java b/tests/test_data/std/jdk/internal/classfile/impl/BufferedMethodBuilder.java
new file mode 100644
index 00000000..c6cf9d8e
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/classfile/impl/BufferedMethodBuilder.java
@@ -0,0 +1,221 @@
+/*
+ * Copyright (c) 2022, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package jdk.internal.classfile.impl;
+
+import java.lang.constant.MethodTypeDesc;
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Optional;
+import java.util.function.Consumer;
+
+import java.lang.classfile.AccessFlags;
+
+import java.lang.classfile.BufWriter;
+import java.lang.classfile.ClassModel;
+import java.lang.classfile.CodeBuilder;
+import java.lang.classfile.CodeModel;
+import java.lang.classfile.CodeTransform;
+import java.lang.classfile.constantpool.ConstantPoolBuilder;
+import java.lang.classfile.MethodBuilder;
+import java.lang.classfile.MethodElement;
+import java.lang.classfile.MethodModel;
+import java.lang.classfile.constantpool.Utf8Entry;
+
+public final class BufferedMethodBuilder
+        implements TerminalMethodBuilder, MethodInfo {
+    private final List<MethodElement> elements;
+    private final SplitConstantPool constantPool;
+    private final ClassFileImpl context;
+    private final Utf8Entry name;
+    private final Utf8Entry desc;
+    private AccessFlags flags;
+    private final MethodModel original;
+    private int[] parameterSlots;
+    MethodTypeDesc mDesc;
+
+    public BufferedMethodBuilder(SplitConstantPool constantPool,
+                                 ClassFileImpl context,
+                                 Utf8Entry nameInfo,
+                                 Utf8Entry typeInfo,
+                                 MethodModel original) {
+        this.elements = new ArrayList<>();
+        this.constantPool = constantPool;
+        this.context = context;
+        this.name = nameInfo;
+        this.desc = typeInfo;
+        this.flags = AccessFlags.ofMethod();
+        this.original = original;
+    }
+
+    @Override
+    public MethodBuilder with(MethodElement element) {
+        elements.add(element);
+        if (element instanceof AccessFlags f) this.flags = f;
+        return this;
+    }
+
+    @Override
+    public ConstantPoolBuilder constantPool() {
+        return constantPool;
+    }
+
+    @Override
+    public Optional<MethodModel> original() {
+        return Optional.ofNullable(original);
+    }
+
+    @Override
+    public Utf8Entry methodName() {
+        return name;
+    }
+
+    @Override
+    public Utf8Entry methodType() {
+        return desc;
+    }
+
+    @Override
+    public MethodTypeDesc methodTypeSymbol() {
+        if (mDesc == null) {
+            if (original instanceof MethodInfo mi) {
+                mDesc = mi.methodTypeSymbol();
+            } else {
+                mDesc = MethodTypeDesc.ofDescriptor(methodType().stringValue());
+            }
+        }
+        return mDesc;
+    }
+
+    @Override
+    public int methodFlags() {
+        return flags.flagsMask();
+    }
+
+    @Override
+    public int parameterSlot(int paramNo) {
+        if (parameterSlots == null)
+            parameterSlots = Util.parseParameterSlots(methodFlags(), methodTypeSymbol());
+        return parameterSlots[paramNo];
+    }
+
+    @Override
+    public MethodBuilder withCode(Consumer<? super CodeBuilder> handler) {
+        return with(new BufferedCodeBuilder(this, constantPool, context, null)
+                            .run(handler)
+                            .toModel());
+    }
+
+    @Override
+    public MethodBuilder transformCode(CodeModel code, CodeTransform transform) {
+        BufferedCodeBuilder builder = new BufferedCodeBuilder(this, constantPool, context, code);
+        builder.transform(code, transform);
+        return with(builder.toModel());
+    }
+
+    @Override
+    public BufferedCodeBuilder bufferedCodeBuilder(CodeModel original) {
+        return new BufferedCodeBuilder(this, constantPool, context, original);
+    }
+
+    public BufferedMethodBuilder run(Consumer<? super MethodBuilder> handler) {
+        handler.accept(this);
+        return this;
+    }
+
+    public MethodModel toModel() {
+        return new Model();
+    }
+
+    public final class Model
+            extends AbstractUnboundModel<MethodElement>
+            implements MethodModel, MethodInfo {
+        public Model() {
+            super(elements);
+        }
+
+        @Override
+        public AccessFlags flags() {
+            return flags;
+        }
+
+        @Override
+        public Optional<ClassModel> parent() {
+            return original().flatMap(MethodModel::parent);
+        }
+
+        @Override
+        public Utf8Entry methodName() {
+            return name;
+        }
+
+        @Override
+        public Utf8Entry methodType() {
+            return desc;
+        }
+
+        @Override
+        public MethodTypeDesc methodTypeSymbol() {
+            return BufferedMethodBuilder.this.methodTypeSymbol();
+        }
+
+        @Override
+        public int methodFlags() {
+            return flags.flagsMask();
+        }
+
+        @Override
+        public int parameterSlot(int paramNo) {
+            return BufferedMethodBuilder.this.parameterSlot(paramNo);
+        }
+
+        @Override
+        public Optional<CodeModel> code() {
+            throw new UnsupportedOperationException("nyi");
+        }
+
+        @Override
+        public void writeTo(DirectClassBuilder builder) {
+            builder.withMethod(methodName(), methodType(), methodFlags(), new Consumer<>() {
+                @Override
+                public void accept(MethodBuilder mb) {
+                    forEachElement(mb);
+                }
+            });
+        }
+
+        @Override
+        public void writeTo(BufWriter buf) {
+            DirectMethodBuilder mb = new DirectMethodBuilder(constantPool, context, name, desc, methodFlags(), null);
+            elements.forEach(mb);
+            mb.writeTo(buf);
+        }
+
+        @Override
+        public String toString() {
+            return String.format("MethodModel[methodName=%s, methodType=%s, flags=%d]",
+                    name.stringValue(), desc.stringValue(), flags.flagsMask());
+        }
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/classfile/impl/BytecodeHelpers$1.class b/tests/test_data/std/jdk/internal/classfile/impl/BytecodeHelpers$1.class
new file mode 100644
index 0000000000000000000000000000000000000000..fe9af9b3c77a3b5613d9aab19f2a47e7c14e2edf
GIT binary patch
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diff --git a/tests/test_data/std/jdk/internal/classfile/impl/BytecodeHelpers.class b/tests/test_data/std/jdk/internal/classfile/impl/BytecodeHelpers.class
new file mode 100644
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HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/classfile/impl/BytecodeHelpers.java b/tests/test_data/std/jdk/internal/classfile/impl/BytecodeHelpers.java
new file mode 100644
index 00000000..f7aa0902
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/classfile/impl/BytecodeHelpers.java
@@ -0,0 +1,350 @@
+/*
+ * Copyright (c) 2022, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package jdk.internal.classfile.impl;
+
+import java.lang.constant.ClassDesc;
+import java.lang.constant.ConstantDesc;
+import java.lang.constant.ConstantDescs;
+import java.lang.constant.DirectMethodHandleDesc;
+import java.lang.constant.DynamicConstantDesc;
+import java.lang.constant.MethodTypeDesc;
+import java.lang.invoke.MethodHandleInfo;
+import java.util.ArrayList;
+import java.util.List;
+
+import java.lang.classfile.BootstrapMethodEntry;
+import java.lang.classfile.constantpool.ClassEntry;
+import java.lang.classfile.constantpool.ConstantDynamicEntry;
+import java.lang.classfile.constantpool.ConstantPoolBuilder;
+import java.lang.classfile.Opcode;
+import java.lang.classfile.TypeKind;
+import java.lang.classfile.constantpool.LoadableConstantEntry;
+import java.lang.classfile.constantpool.MemberRefEntry;
+import java.lang.classfile.constantpool.MethodHandleEntry;
+import java.lang.classfile.constantpool.NameAndTypeEntry;
+
+public class BytecodeHelpers {
+
+    private BytecodeHelpers() {
+    }
+
+    public static Opcode loadOpcode(TypeKind tk, int slot) {
+        return switch (tk) {
+            case IntType, ShortType, ByteType, CharType, BooleanType -> switch (slot) {
+                case 0 -> Opcode.ILOAD_0;
+                case 1 -> Opcode.ILOAD_1;
+                case 2 -> Opcode.ILOAD_2;
+                case 3 -> Opcode.ILOAD_3;
+                default -> (slot < 256) ? Opcode.ILOAD : Opcode.ILOAD_W;
+            };
+            case LongType -> switch (slot) {
+                case 0 -> Opcode.LLOAD_0;
+                case 1 -> Opcode.LLOAD_1;
+                case 2 -> Opcode.LLOAD_2;
+                case 3 -> Opcode.LLOAD_3;
+                default -> (slot < 256) ? Opcode.LLOAD : Opcode.LLOAD_W;
+            };
+            case DoubleType -> switch (slot) {
+                case 0 -> Opcode.DLOAD_0;
+                case 1 -> Opcode.DLOAD_1;
+                case 2 -> Opcode.DLOAD_2;
+                case 3 -> Opcode.DLOAD_3;
+                default -> (slot < 256) ? Opcode.DLOAD : Opcode.DLOAD_W;
+            };
+            case FloatType -> switch (slot) {
+                case 0 -> Opcode.FLOAD_0;
+                case 1 -> Opcode.FLOAD_1;
+                case 2 -> Opcode.FLOAD_2;
+                case 3 -> Opcode.FLOAD_3;
+                default -> (slot < 256) ? Opcode.FLOAD : Opcode.FLOAD_W;
+            };
+            case ReferenceType -> switch (slot) {
+                case 0 -> Opcode.ALOAD_0;
+                case 1 -> Opcode.ALOAD_1;
+                case 2 -> Opcode.ALOAD_2;
+                case 3 -> Opcode.ALOAD_3;
+                default -> (slot < 256) ? Opcode.ALOAD : Opcode.ALOAD_W;
+            };
+            case VoidType -> throw new IllegalArgumentException("void");
+        };
+    }
+
+    public static Opcode storeOpcode(TypeKind tk, int slot) {
+        return switch (tk) {
+            case IntType, ShortType, ByteType, CharType, BooleanType -> switch (slot) {
+                case 0 -> Opcode.ISTORE_0;
+                case 1 -> Opcode.ISTORE_1;
+                case 2 -> Opcode.ISTORE_2;
+                case 3 -> Opcode.ISTORE_3;
+                default -> (slot < 256) ? Opcode.ISTORE : Opcode.ISTORE_W;
+            };
+            case LongType -> switch (slot) {
+                case 0 -> Opcode.LSTORE_0;
+                case 1 -> Opcode.LSTORE_1;
+                case 2 -> Opcode.LSTORE_2;
+                case 3 -> Opcode.LSTORE_3;
+                default -> (slot < 256) ? Opcode.LSTORE : Opcode.LSTORE_W;
+            };
+            case DoubleType -> switch (slot) {
+                case 0 -> Opcode.DSTORE_0;
+                case 1 -> Opcode.DSTORE_1;
+                case 2 -> Opcode.DSTORE_2;
+                case 3 -> Opcode.DSTORE_3;
+                default -> (slot < 256) ? Opcode.DSTORE : Opcode.DSTORE_W;
+            };
+            case FloatType -> switch (slot) {
+                case 0 -> Opcode.FSTORE_0;
+                case 1 -> Opcode.FSTORE_1;
+                case 2 -> Opcode.FSTORE_2;
+                case 3 -> Opcode.FSTORE_3;
+                default -> (slot < 256) ? Opcode.FSTORE : Opcode.FSTORE_W;
+            };
+            case ReferenceType -> switch (slot) {
+                case 0 -> Opcode.ASTORE_0;
+                case 1 -> Opcode.ASTORE_1;
+                case 2 -> Opcode.ASTORE_2;
+                case 3 -> Opcode.ASTORE_3;
+                default -> (slot < 256) ? Opcode.ASTORE : Opcode.ASTORE_W;
+            };
+            case VoidType -> throw new IllegalArgumentException("void");
+        };
+    }
+
+    public static Opcode returnOpcode(TypeKind tk) {
+        return switch (tk) {
+            case ByteType, ShortType, IntType, CharType, BooleanType -> Opcode.IRETURN;
+            case FloatType -> Opcode.FRETURN;
+            case LongType -> Opcode.LRETURN;
+            case DoubleType -> Opcode.DRETURN;
+            case ReferenceType -> Opcode.ARETURN;
+            case VoidType -> Opcode.RETURN;
+        };
+    }
+
+    public static Opcode arrayLoadOpcode(TypeKind tk) {
+        return switch (tk) {
+            case ByteType, BooleanType -> Opcode.BALOAD;
+            case ShortType -> Opcode.SALOAD;
+            case IntType -> Opcode.IALOAD;
+            case FloatType -> Opcode.FALOAD;
+            case LongType -> Opcode.LALOAD;
+            case DoubleType -> Opcode.DALOAD;
+            case ReferenceType -> Opcode.AALOAD;
+            case CharType -> Opcode.CALOAD;
+            case VoidType -> throw new IllegalArgumentException("void not an allowable array type");
+        };
+    }
+
+    public static Opcode arrayStoreOpcode(TypeKind tk) {
+        return switch (tk) {
+            case ByteType, BooleanType -> Opcode.BASTORE;
+            case ShortType -> Opcode.SASTORE;
+            case IntType -> Opcode.IASTORE;
+            case FloatType -> Opcode.FASTORE;
+            case LongType -> Opcode.LASTORE;
+            case DoubleType -> Opcode.DASTORE;
+            case ReferenceType -> Opcode.AASTORE;
+            case CharType -> Opcode.CASTORE;
+            case VoidType -> throw new IllegalArgumentException("void not an allowable array type");
+        };
+    }
+
+    public static Opcode reverseBranchOpcode(Opcode op) {
+        return switch (op) {
+            case IFEQ -> Opcode.IFNE;
+            case IFNE -> Opcode.IFEQ;
+            case IFLT -> Opcode.IFGE;
+            case IFGE -> Opcode.IFLT;
+            case IFGT -> Opcode.IFLE;
+            case IFLE -> Opcode.IFGT;
+            case IF_ICMPEQ -> Opcode.IF_ICMPNE;
+            case IF_ICMPNE -> Opcode.IF_ICMPEQ;
+            case IF_ICMPLT -> Opcode.IF_ICMPGE;
+            case IF_ICMPGE -> Opcode.IF_ICMPLT;
+            case IF_ICMPGT -> Opcode.IF_ICMPLE;
+            case IF_ICMPLE -> Opcode.IF_ICMPGT;
+            case IF_ACMPEQ -> Opcode.IF_ACMPNE;
+            case IF_ACMPNE -> Opcode.IF_ACMPEQ;
+            case IFNULL -> Opcode.IFNONNULL;
+            case IFNONNULL -> Opcode.IFNULL;
+            default -> throw new IllegalArgumentException("Unknown branch instruction: " + op);
+        };
+    }
+
+    public static Opcode convertOpcode(TypeKind from, TypeKind to) {
+        return switch (from) {
+            case IntType ->
+                    switch (to) {
+                        case LongType -> Opcode.I2L;
+                        case FloatType -> Opcode.I2F;
+                        case DoubleType -> Opcode.I2D;
+                        case ByteType -> Opcode.I2B;
+                        case CharType -> Opcode.I2C;
+                        case ShortType -> Opcode.I2S;
+                        default -> throw new IllegalArgumentException(String.format("convert %s -> %s", from, to));
+                    };
+            case LongType ->
+                    switch (to) {
+                        case FloatType -> Opcode.L2F;
+                        case DoubleType -> Opcode.L2D;
+                        case IntType -> Opcode.L2I;
+                        default -> throw new IllegalArgumentException(String.format("convert %s -> %s", from, to));
+                    };
+            case DoubleType ->
+                    switch (to) {
+                        case FloatType -> Opcode.D2F;
+                        case LongType -> Opcode.D2L;
+                        case IntType -> Opcode.D2I;
+                        default -> throw new IllegalArgumentException(String.format("convert %s -> %s", from, to));
+                    };
+            case FloatType ->
+                    switch (to) {
+                        case LongType -> Opcode.F2L;
+                        case DoubleType -> Opcode.F2D;
+                        case IntType -> Opcode.F2I;
+                        default -> throw new IllegalArgumentException(String.format("convert %s -> %s", from, to));
+                    };
+            default -> throw new IllegalArgumentException(String.format("convert %s -> %s", from, to));
+        };
+    }
+
+    static void validateSIPUSH(ConstantDesc d) {
+        if (d instanceof Integer iVal && Short.MIN_VALUE <= iVal && iVal <= Short.MAX_VALUE)
+            return;
+
+        if (d instanceof Long lVal && Short.MIN_VALUE <= lVal && Short.MAX_VALUE <= lVal)
+            return;
+
+        throw new IllegalArgumentException("SIPUSH: value must be within: Short.MIN_VALUE <= value <= Short.MAX_VALUE"
+                                           + ", found: " + d);
+    }
+
+    static void validateBIPUSH(ConstantDesc d) {
+        if (d instanceof Integer iVal && Byte.MIN_VALUE <= iVal && iVal <= Byte.MAX_VALUE)
+            return;
+
+        if (d instanceof Long lVal && Byte.MIN_VALUE <= lVal && Byte.MAX_VALUE <= lVal)
+            return;
+
+        throw new IllegalArgumentException("BIPUSH: value must be within: Byte.MIN_VALUE <= value <= Byte.MAX_VALUE"
+                                           + ", found: " + d);
+    }
+
+    public static MethodHandleEntry handleDescToHandleInfo(ConstantPoolBuilder constantPool, DirectMethodHandleDesc bootstrapMethod) {
+        ClassEntry bsOwner = constantPool.classEntry(bootstrapMethod.owner());
+        NameAndTypeEntry bsNameAndType = constantPool.nameAndTypeEntry(constantPool.utf8Entry(bootstrapMethod.methodName()),
+                                                               constantPool.utf8Entry(bootstrapMethod.lookupDescriptor()));
+        int bsRefKind = bootstrapMethod.refKind();
+        MemberRefEntry bsReference = toBootstrapMemberRef(constantPool, bsRefKind, bsOwner, bsNameAndType, bootstrapMethod.isOwnerInterface());
+
+        return constantPool.methodHandleEntry(bsRefKind, bsReference);
+    }
+
+    static MemberRefEntry toBootstrapMemberRef(ConstantPoolBuilder constantPool, int bsRefKind, ClassEntry owner, NameAndTypeEntry nat, boolean isOwnerInterface) {
+        return isOwnerInterface
+               ? constantPool.interfaceMethodRefEntry(owner, nat)
+               : bsRefKind <= MethodHandleInfo.REF_putStatic
+                 ? constantPool.fieldRefEntry(owner, nat)
+                 : constantPool.methodRefEntry(owner, nat);
+    }
+
+    static ConstantDynamicEntry handleConstantDescToHandleInfo(ConstantPoolBuilder constantPool, DynamicConstantDesc<?> desc) {
+        ConstantDesc[] bootstrapArgs = desc.bootstrapArgs();
+        List<LoadableConstantEntry> staticArgs = new ArrayList<>(bootstrapArgs.length);
+        for (ConstantDesc bootstrapArg : bootstrapArgs)
+            staticArgs.add(constantPool.loadableConstantEntry(bootstrapArg));
+
+        var bootstrapDesc = desc.bootstrapMethod();
+        ClassEntry bsOwner = constantPool.classEntry(bootstrapDesc.owner());
+        NameAndTypeEntry bsNameAndType = constantPool.nameAndTypeEntry(bootstrapDesc.methodName(),
+                                                               bootstrapDesc.invocationType());
+        int bsRefKind = bootstrapDesc.refKind();
+
+        MemberRefEntry memberRefEntry = toBootstrapMemberRef(constantPool, bsRefKind, bsOwner, bsNameAndType, bootstrapDesc.isOwnerInterface());
+        MethodHandleEntry methodHandleEntry = constantPool.methodHandleEntry(bsRefKind, memberRefEntry);
+        BootstrapMethodEntry bme = constantPool.bsmEntry(methodHandleEntry, staticArgs);
+        return constantPool.constantDynamicEntry(bme,
+                                                 constantPool.nameAndTypeEntry(desc.constantName(),
+                                                                       desc.constantType()));
+    }
+
+    public static void validateValue(Opcode opcode, ConstantDesc v) {
+        switch (opcode) {
+            case ACONST_NULL -> {
+                if (v != null && v != ConstantDescs.NULL)
+                    throw new IllegalArgumentException("value must be null or ConstantDescs.NULL with opcode ACONST_NULL");
+            }
+            case SIPUSH ->
+                    validateSIPUSH(v);
+            case BIPUSH ->
+                    validateBIPUSH(v);
+            case LDC, LDC_W, LDC2_W -> {
+                if (v == null)
+                    throw new IllegalArgumentException("`null` must use ACONST_NULL");
+            }
+            default -> {
+                var exp = opcode.constantValue();
+                if (exp == null)
+                    throw new IllegalArgumentException("Can not use Opcode: " + opcode + " with constant()");
+                if (v == null || !(v.equals(exp) || (exp instanceof Long l && v.equals(l.intValue())))) {
+                    var t = (exp instanceof Long) ? "L" : (exp instanceof Float) ? "f" : (exp instanceof Double) ? "d" : "";
+                    throw new IllegalArgumentException("value must be " + exp + t + " with opcode " + opcode.name());
+                }
+            }
+        }
+    }
+
+    public static LoadableConstantEntry constantEntry(ConstantPoolBuilder constantPool,
+                                                      ConstantDesc constantValue) {
+        // this method is invoked during JVM bootstrap - cannot use pattern switch
+        if (constantValue instanceof Integer value) {
+            return constantPool.intEntry(value);
+        }
+        if (constantValue instanceof String value) {
+            return constantPool.stringEntry(value);
+        }
+        if (constantValue instanceof ClassDesc value && !value.isPrimitive()) {
+            return constantPool.classEntry(value);
+        }
+        if (constantValue instanceof Long value) {
+            return constantPool.longEntry(value);
+        }
+        if (constantValue instanceof Float value) {
+            return constantPool.floatEntry(value);
+        }
+        if (constantValue instanceof Double value) {
+            return constantPool.doubleEntry(value);
+        }
+        if (constantValue instanceof MethodTypeDesc value) {
+            return constantPool.methodTypeEntry(value);
+        }
+        if (constantValue instanceof DirectMethodHandleDesc value) {
+            return handleDescToHandleInfo(constantPool, value);
+        } if (constantValue instanceof DynamicConstantDesc<?> value) {
+            return handleConstantDescToHandleInfo(constantPool, value);
+        }
+        throw new UnsupportedOperationException("not yet: " + constantValue);
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/classfile/impl/CatchBuilderImpl.class b/tests/test_data/std/jdk/internal/classfile/impl/CatchBuilderImpl.class
new file mode 100644
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/classfile/impl/CatchBuilderImpl.java b/tests/test_data/std/jdk/internal/classfile/impl/CatchBuilderImpl.java
new file mode 100644
index 00000000..5d262c39
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/classfile/impl/CatchBuilderImpl.java
@@ -0,0 +1,111 @@
+/*
+ * Copyright (c) 2022, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package jdk.internal.classfile.impl;
+
+import java.lang.classfile.CodeBuilder;
+import java.lang.classfile.Label;
+import java.lang.classfile.Opcode;
+
+import java.lang.constant.ClassDesc;
+import java.lang.constant.ConstantDesc;
+import java.util.HashSet;
+import java.util.List;
+import java.util.Objects;
+import java.util.Set;
+import java.util.function.Consumer;
+
+public final class CatchBuilderImpl implements CodeBuilder.CatchBuilder {
+    final CodeBuilder b;
+    final BlockCodeBuilderImpl tryBlock;
+    final Label tryCatchEnd;
+    final Set<ConstantDesc> catchTypes;
+    BlockCodeBuilderImpl catchBlock;
+
+    public CatchBuilderImpl(CodeBuilder b, BlockCodeBuilderImpl tryBlock, Label tryCatchEnd) {
+        this.b = b;
+        this.tryBlock = tryBlock;
+        this.tryCatchEnd = tryCatchEnd;
+        this.catchTypes = new HashSet<>();
+    }
+
+    @Override
+    public CodeBuilder.CatchBuilder catching(ClassDesc exceptionType, Consumer<CodeBuilder.BlockCodeBuilder> catchHandler) {
+        return catchingMulti(exceptionType == null ? List.of() : List.of(exceptionType), catchHandler);
+    }
+
+    @Override
+    public CodeBuilder.CatchBuilder catchingMulti(List<ClassDesc> exceptionTypes, Consumer<CodeBuilder.BlockCodeBuilder> catchHandler) {
+        Objects.requireNonNull(exceptionTypes);
+        Objects.requireNonNull(catchHandler);
+
+        if (catchBlock == null) {
+            if (tryBlock.reachable()) {
+                b.branch(Opcode.GOTO, tryCatchEnd);
+            }
+        }
+
+        for (var exceptionType : exceptionTypes) {
+            if (!catchTypes.add(exceptionType)) {
+                throw new IllegalArgumentException("Existing catch block catches exception of type: " + exceptionType);
+            }
+        }
+
+        // Finish prior catch block
+        if (catchBlock != null) {
+            catchBlock.end();
+            if (catchBlock.reachable()) {
+                b.branch(Opcode.GOTO, tryCatchEnd);
+            }
+        }
+
+        catchBlock = new BlockCodeBuilderImpl(b, tryCatchEnd);
+        Label tryStart = tryBlock.startLabel();
+        Label tryEnd = tryBlock.endLabel();
+        if (exceptionTypes.isEmpty()) {
+            catchBlock.exceptionCatchAll(tryStart, tryEnd, catchBlock.startLabel());
+        }
+        else {
+            for (var exceptionType : exceptionTypes) {
+                catchBlock.exceptionCatch(tryStart, tryEnd, catchBlock.startLabel(), exceptionType);
+            }
+        }
+        catchBlock.start();
+        catchHandler.accept(catchBlock);
+
+        return this;
+    }
+
+    @Override
+    public void catchingAll(Consumer<CodeBuilder.BlockCodeBuilder> catchAllHandler) {
+        catchingMulti(List.of(), catchAllHandler);
+    }
+
+    public void finish() {
+        if (catchBlock != null) {
+            catchBlock.end();
+        }
+        b.labelBinding(tryCatchEnd);
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/classfile/impl/ChainedClassBuilder.class b/tests/test_data/std/jdk/internal/classfile/impl/ChainedClassBuilder.class
new file mode 100644
index 0000000000000000000000000000000000000000..04977791414ef68fc500b18b7ffb3b9076d36957
GIT binary patch
literal 6243
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z;~RKfhD7Kg+&<qv?rBQ&F=C#fs2;~LoDboiY~r58m+=)3_ax6dzDnHtSxLTzuM?%f
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E0H38RbN~PV

literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/classfile/impl/ChainedClassBuilder.java b/tests/test_data/std/jdk/internal/classfile/impl/ChainedClassBuilder.java
new file mode 100644
index 00000000..b33d192f
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/classfile/impl/ChainedClassBuilder.java
@@ -0,0 +1,102 @@
+/*
+ * Copyright (c) 2022, 2024, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package jdk.internal.classfile.impl;
+
+import java.util.Optional;
+import java.util.function.Consumer;
+
+import java.lang.classfile.*;
+import java.lang.classfile.constantpool.ConstantPoolBuilder;
+import java.lang.classfile.constantpool.Utf8Entry;
+
+public final class ChainedClassBuilder
+        implements ClassBuilder, Consumer<ClassElement> {
+    private final DirectClassBuilder terminal;
+    private final Consumer<ClassElement> consumer;
+
+    public ChainedClassBuilder(ClassBuilder downstream,
+                               Consumer<ClassElement> consumer) {
+        this.consumer = consumer;
+        this.terminal = switch (downstream) {
+            case ChainedClassBuilder cb -> cb.terminal;
+            case DirectClassBuilder db -> db;
+        };
+    }
+
+    @Override
+    public ClassBuilder with(ClassElement element) {
+        consumer.accept(element);
+        return this;
+    }
+
+    @Override
+    public Optional<ClassModel> original() {
+        return terminal.original();
+    }
+
+    @Override
+    public ClassBuilder withField(Utf8Entry name, Utf8Entry descriptor, Consumer<? super FieldBuilder> handler) {
+        consumer.accept(new BufferedFieldBuilder(terminal.constantPool, terminal.context,
+                                                        name, descriptor, null)
+                                       .run(handler)
+                                       .toModel());
+        return this;
+    }
+
+    @Override
+    public ClassBuilder transformField(FieldModel field, FieldTransform transform) {
+        BufferedFieldBuilder builder = new BufferedFieldBuilder(terminal.constantPool, terminal.context,
+                                                                field.fieldName(), field.fieldType(),
+                                                                field);
+        builder.transform(field, transform);
+        consumer.accept(builder.toModel());
+        return this;
+    }
+
+    @Override
+    public ClassBuilder withMethod(Utf8Entry name, Utf8Entry descriptor, int flags,
+                                   Consumer<? super MethodBuilder> handler) {
+        consumer.accept(new BufferedMethodBuilder(terminal.constantPool, terminal.context,
+                                                         name, descriptor, null)
+                                       .run(handler)
+                                       .toModel());
+        return this;
+    }
+
+    @Override
+    public ClassBuilder transformMethod(MethodModel method, MethodTransform transform) {
+        BufferedMethodBuilder builder = new BufferedMethodBuilder(terminal.constantPool, terminal.context,
+                                                                  method.methodName(), method.methodType(), method);
+        builder.transform(method, transform);
+        consumer.accept(builder.toModel());
+        return this;
+    }
+
+    @Override
+    public ConstantPoolBuilder constantPool() {
+        return terminal.constantPool();
+    }
+
+}
diff --git a/tests/test_data/std/jdk/internal/classfile/impl/ChainedCodeBuilder.class b/tests/test_data/std/jdk/internal/classfile/impl/ChainedCodeBuilder.class
new file mode 100644
index 0000000000000000000000000000000000000000..bd507a6f330044717c3fe33dc4122ae3b0214514
GIT binary patch
literal 1935
zcmbtVTT|0O7(E*<Y11GT1ytlJDs7Q)^MXZgMQ0o<Is?P|Hd$yeO*?5S<A3r&XS@tP
zI6nKM9KTIch_+N6ADU#p-96`gXTSaW{l}ND017B*P|&5KTSpIi85WPMSBCBS!gIM}
zm=3Sk4{S#mcBSSRJ5@PRv1zJMwZvA#b}ZpB^sd^j?XNLR&lHdNYi>B)J&bLREzW25
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zWW^mFb1)dXk8QuqupLJ`D_QA8v?<@-@witE$zA)<<$l8x3>%#aYxP{?n{;b=hRyR;
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z8}R_61S!8Hk%ATamV{wsfg&OGLyA#@qo*WZrng+9Wj~<r1Q!|J(MSn+r9{98_(CKt
z;$yONwMQ6kMObc&K+P&bSSLP(m{O$STJ8j63f}%EVkLkW3YW!_&SRB8=<kJOh6!y)
zU^;=R1U9W8dzO;?9|YFO#`PGYeu}8$5zVsnCLu~$(xRmZF`3PML-rG9&)`CbregUe
TBd879*hBWELAo|+pkV7KKFH?3

literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/classfile/impl/ChainedCodeBuilder.java b/tests/test_data/std/jdk/internal/classfile/impl/ChainedCodeBuilder.java
new file mode 100644
index 00000000..8c6c80b3
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/classfile/impl/ChainedCodeBuilder.java
@@ -0,0 +1,65 @@
+/*
+ * Copyright (c) 2022, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package jdk.internal.classfile.impl;
+
+import java.lang.classfile.CodeBuilder;
+import java.lang.classfile.CodeElement;
+import java.lang.classfile.TypeKind;
+import java.lang.classfile.Label;
+
+import java.util.function.Consumer;
+
+public final class ChainedCodeBuilder
+        extends NonterminalCodeBuilder
+        implements CodeBuilder {
+    private final Consumer<CodeElement> consumer;
+
+    public ChainedCodeBuilder(CodeBuilder downstream,
+                              Consumer<CodeElement> consumer) {
+        super(downstream);
+        this.consumer = consumer;
+    }
+
+    @Override
+    public Label startLabel() {
+        return terminal.startLabel();
+    }
+
+    @Override
+    public Label endLabel() {
+        return terminal.endLabel();
+    }
+
+    @Override
+    public int allocateLocal(TypeKind typeKind) {
+        return parent.allocateLocal(typeKind);
+    }
+
+    @Override
+    public CodeBuilder with(CodeElement element) {
+        consumer.accept(element);
+        return this;
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/classfile/impl/ChainedFieldBuilder.class b/tests/test_data/std/jdk/internal/classfile/impl/ChainedFieldBuilder.class
new file mode 100644
index 0000000000000000000000000000000000000000..8e5b7517ea36a871ab0f6e98094eb47d30f9078d
GIT binary patch
literal 2603
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z_rFa0BmyYO5U^0E6|I^?7&#x|L6ZnU@;>1TJXd&EksdLkN{3D?+W1SPVo24|sQ+Lf
zt|X%=S^ERqQwep7yaLg)z=)snn~HdkPvw<Jjlag-Uol+|7m&LdftCnEeMW~4YSII=
cVU?2@){x^fNu2APbz&G_hVw0^`fCjQ4bgt4b^rhX

literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/classfile/impl/ChainedFieldBuilder.java b/tests/test_data/std/jdk/internal/classfile/impl/ChainedFieldBuilder.java
new file mode 100644
index 00000000..3c892324
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/classfile/impl/ChainedFieldBuilder.java
@@ -0,0 +1,65 @@
+/*
+ * Copyright (c) 2022, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package jdk.internal.classfile.impl;
+
+import java.util.Optional;
+import java.util.function.Consumer;
+
+import java.lang.classfile.FieldBuilder;
+import java.lang.classfile.FieldElement;
+import java.lang.classfile.FieldModel;
+import java.lang.classfile.constantpool.ConstantPoolBuilder;
+
+public final class ChainedFieldBuilder implements FieldBuilder {
+    private final TerminalFieldBuilder terminal;
+    private final Consumer<FieldElement> consumer;
+
+    public ChainedFieldBuilder(FieldBuilder downstream,
+                               Consumer<FieldElement> consumer) {
+        this.consumer = consumer;
+        this.terminal = switch (downstream) {
+            case ChainedFieldBuilder cb -> cb.terminal;
+            case TerminalFieldBuilder tb -> tb;
+        };
+    }
+
+    @Override
+    public ConstantPoolBuilder constantPool() {
+        return terminal.constantPool();
+    }
+
+    @Override
+    public Optional<FieldModel> original() {
+        return terminal.original();
+    }
+
+    @Override
+    public FieldBuilder with(FieldElement element) {
+        consumer.accept(element);
+        return this;
+    }
+
+}
+
diff --git a/tests/test_data/std/jdk/internal/classfile/impl/ChainedMethodBuilder.class b/tests/test_data/std/jdk/internal/classfile/impl/ChainedMethodBuilder.class
new file mode 100644
index 0000000000000000000000000000000000000000..59ed8d7f180dedc2b30521cdafff97c1e56a7a64
GIT binary patch
literal 3842
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/classfile/impl/ChainedMethodBuilder.java b/tests/test_data/std/jdk/internal/classfile/impl/ChainedMethodBuilder.java
new file mode 100644
index 00000000..866dda2c
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/classfile/impl/ChainedMethodBuilder.java
@@ -0,0 +1,83 @@
+/*
+ * Copyright (c) 2022, 2024, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package jdk.internal.classfile.impl;
+
+import java.util.Optional;
+import java.util.function.Consumer;
+
+import java.lang.classfile.CodeBuilder;
+import java.lang.classfile.CodeModel;
+import java.lang.classfile.CodeTransform;
+import java.lang.classfile.MethodBuilder;
+import java.lang.classfile.MethodElement;
+import java.lang.classfile.MethodModel;
+import java.lang.classfile.constantpool.ConstantPoolBuilder;
+
+public final class ChainedMethodBuilder implements MethodBuilder {
+    final TerminalMethodBuilder terminal;
+    final Consumer<MethodElement> consumer;
+
+    public ChainedMethodBuilder(MethodBuilder downstream,
+                                Consumer<MethodElement> consumer) {
+        this.consumer = consumer;
+        this.terminal = switch (downstream) {
+            case ChainedMethodBuilder cb -> cb.terminal;
+            case TerminalMethodBuilder tb -> tb;
+        };
+    }
+
+    @Override
+    public MethodBuilder with(MethodElement element) {
+        consumer.accept(element);
+        return this;
+    }
+
+    @Override
+    public MethodBuilder withCode(Consumer<? super CodeBuilder> handler) {
+        consumer.accept(terminal.bufferedCodeBuilder(null)
+                                       .run(handler)
+                                       .toModel());
+        return this;
+    }
+
+    @Override
+    public MethodBuilder transformCode(CodeModel code, CodeTransform transform) {
+        BufferedCodeBuilder builder = terminal.bufferedCodeBuilder(code);
+        builder.transform(code, transform);
+        consumer.accept(builder.toModel());
+        return this;
+    }
+
+    @Override
+    public ConstantPoolBuilder constantPool() {
+        return terminal.constantPool();
+    }
+
+    @Override
+    public Optional<MethodModel> original() {
+        return terminal.original();
+    }
+
+}
diff --git a/tests/test_data/std/jdk/internal/classfile/impl/ClassFileImpl$1.class b/tests/test_data/std/jdk/internal/classfile/impl/ClassFileImpl$1.class
new file mode 100644
index 0000000000000000000000000000000000000000..5f091b1b966636701615e56b60dd0e9028a4fd7d
GIT binary patch
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/classfile/impl/ClassFileImpl$2.class b/tests/test_data/std/jdk/internal/classfile/impl/ClassFileImpl$2.class
new file mode 100644
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/classfile/impl/ClassFileImpl$AttributeMapperOptionImpl.class b/tests/test_data/std/jdk/internal/classfile/impl/ClassFileImpl$AttributeMapperOptionImpl.class
new file mode 100644
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/classfile/impl/ClassFileImpl$ClassHierarchyResolverOptionImpl.class b/tests/test_data/std/jdk/internal/classfile/impl/ClassFileImpl$ClassHierarchyResolverOptionImpl.class
new file mode 100644
index 0000000000000000000000000000000000000000..4d793b671456e264990225fd8cf0a76962b4f938
GIT binary patch
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diff --git a/tests/test_data/std/jdk/internal/classfile/impl/ClassFileImpl.class b/tests/test_data/std/jdk/internal/classfile/impl/ClassFileImpl.class
new file mode 100644
index 0000000000000000000000000000000000000000..48f595908583e58d9d2b876fa5faf5d35dc5b76e
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/classfile/impl/ClassFileImpl.java b/tests/test_data/std/jdk/internal/classfile/impl/ClassFileImpl.java
new file mode 100644
index 00000000..8bffbd6d
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/classfile/impl/ClassFileImpl.java
@@ -0,0 +1,154 @@
+/*
+ * Copyright (c) 2022, 2023, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package jdk.internal.classfile.impl;
+
+import java.util.List;
+import java.util.function.Function;
+import java.util.function.Consumer;
+
+import java.lang.classfile.AttributeMapper;
+import java.lang.classfile.ClassFile;
+import java.lang.classfile.ClassFile.*;
+import java.lang.classfile.ClassBuilder;
+import java.lang.classfile.ClassHierarchyResolver;
+import java.lang.classfile.ClassModel;
+import java.lang.classfile.ClassTransform;
+import java.lang.classfile.constantpool.ClassEntry;
+import java.lang.classfile.constantpool.ConstantPoolBuilder;
+import java.lang.classfile.constantpool.Utf8Entry;
+import jdk.internal.classfile.impl.verifier.VerifierImpl;
+
+public record ClassFileImpl(StackMapsOption stackMapsOption,
+                            DebugElementsOption debugElementsOption,
+                            LineNumbersOption lineNumbersOption,
+                            AttributesProcessingOption attributesProcessingOption,
+                            ConstantPoolSharingOption constantPoolSharingOption,
+                            ShortJumpsOption shortJumpsOption,
+                            DeadCodeOption deadCodeOption,
+                            DeadLabelsOption deadLabelsOption,
+                            ClassHierarchyResolverOption classHierarchyResolverOption,
+                            AttributeMapperOption attributeMapperOption) implements ClassFile {
+
+    public static final ClassFileImpl DEFAULT_CONTEXT = new ClassFileImpl(
+            StackMapsOption.STACK_MAPS_WHEN_REQUIRED,
+            DebugElementsOption.PASS_DEBUG,
+            LineNumbersOption.PASS_LINE_NUMBERS,
+            AttributesProcessingOption.PASS_ALL_ATTRIBUTES,
+            ConstantPoolSharingOption.SHARED_POOL,
+            ShortJumpsOption.FIX_SHORT_JUMPS,
+            DeadCodeOption.PATCH_DEAD_CODE,
+            DeadLabelsOption.FAIL_ON_DEAD_LABELS,
+            new ClassHierarchyResolverOptionImpl(ClassHierarchyResolver.defaultResolver()),
+            new AttributeMapperOptionImpl(new Function<>() {
+                @Override
+                public AttributeMapper<?> apply(Utf8Entry k) {
+                    return null;
+                }
+            }));
+
+    @SuppressWarnings("unchecked")
+    @Override
+    public ClassFileImpl withOptions(Option... options) {
+        var smo = stackMapsOption;
+        var deo = debugElementsOption;
+        var lno = lineNumbersOption;
+        var apo = attributesProcessingOption;
+        var cpso = constantPoolSharingOption;
+        var sjo = shortJumpsOption;
+        var dco = deadCodeOption;
+        var dlo = deadLabelsOption;
+        var chro = classHierarchyResolverOption;
+        var amo = attributeMapperOption;
+        for (var o : options) {
+            switch (o) {
+                case StackMapsOption oo -> smo = oo;
+                case DebugElementsOption oo -> deo = oo;
+                case LineNumbersOption oo -> lno = oo;
+                case AttributesProcessingOption oo -> apo = oo;
+                case ConstantPoolSharingOption oo -> cpso = oo;
+                case ShortJumpsOption oo -> sjo = oo;
+                case DeadCodeOption oo -> dco = oo;
+                case DeadLabelsOption oo -> dlo = oo;
+                case ClassHierarchyResolverOption oo -> chro = oo;
+                case AttributeMapperOption oo -> amo = oo;
+            }
+        }
+        return new ClassFileImpl(smo, deo, lno, apo, cpso, sjo, dco, dlo, chro, amo);
+    }
+
+    @Override
+    public ClassModel parse(byte[] bytes) {
+        return new ClassImpl(bytes, this);
+    }
+
+    @Override
+    public byte[] build(ClassEntry thisClassEntry,
+                         ConstantPoolBuilder constantPool,
+                         Consumer<? super ClassBuilder> handler) {
+        thisClassEntry = AbstractPoolEntry.maybeClone(constantPool, thisClassEntry);
+        DirectClassBuilder builder = new DirectClassBuilder((SplitConstantPool)constantPool, this, thisClassEntry);
+        handler.accept(builder);
+        return builder.build();
+    }
+
+    @Override
+    public byte[] transform(ClassModel model, ClassEntry newClassName, ClassTransform transform) {
+        ConstantPoolBuilder constantPool = constantPoolSharingOption() == ConstantPoolSharingOption.SHARED_POOL
+                                                                     ? ConstantPoolBuilder.of(model)
+                                                                     : ConstantPoolBuilder.of();
+        return build(newClassName, constantPool,
+                new Consumer<ClassBuilder>() {
+                    @Override
+                    public void accept(ClassBuilder builder) {
+                        ((DirectClassBuilder) builder).setOriginal((ClassImpl)model);
+                        ((DirectClassBuilder) builder).setSizeHint(((ClassImpl)model).classfileLength());
+                        builder.transform((ClassImpl)model, transform);
+                    }
+                });
+    }
+
+    @Override
+    public List<VerifyError> verify(ClassModel model) {
+        return VerifierImpl.verify(model, classHierarchyResolverOption().classHierarchyResolver(), null);
+    }
+
+    @Override
+    public List<VerifyError> verify(byte[] bytes) {
+        try {
+            return verify(parse(bytes));
+        } catch (IllegalArgumentException parsingError) {
+            return List.of(new VerifyError(parsingError.getMessage()));
+        }
+    }
+
+    public record AttributeMapperOptionImpl(Function<Utf8Entry, AttributeMapper<?>> attributeMapper)
+            implements AttributeMapperOption {
+    }
+
+    public record ClassHierarchyResolverOptionImpl(ClassHierarchyResolver classHierarchyResolver)
+            implements ClassHierarchyResolverOption {
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/classfile/impl/ClassFileVersionImpl.class b/tests/test_data/std/jdk/internal/classfile/impl/ClassFileVersionImpl.class
new file mode 100644
index 0000000000000000000000000000000000000000..87994c33dff188461531e9e7101731b4d55670fe
GIT binary patch
literal 1310
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zQDUM$z#nBivs>C)nkGE#nVB=^eBZgv{`vd!H-Iu8r4T_>K}<y)35JbU^MfuNpL>pJ
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zH33(-*A}j05Ilown=RMtsu-9dA*WPiB%W#ur+1mc46+KYshGtaLvb9}E8+2mA27b`
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/classfile/impl/ClassFileVersionImpl.java b/tests/test_data/std/jdk/internal/classfile/impl/ClassFileVersionImpl.java
new file mode 100644
index 00000000..ba260529
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/classfile/impl/ClassFileVersionImpl.java
@@ -0,0 +1,58 @@
+/*
+ * Copyright (c) 2022, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package jdk.internal.classfile.impl;
+
+import java.lang.classfile.ClassFileVersion;
+
+public final class ClassFileVersionImpl
+        extends AbstractElement
+        implements ClassFileVersion {
+    private final int majorVersion, minorVersion;
+
+    public ClassFileVersionImpl(int majorVersion, int minorVersion) {
+        this.majorVersion = majorVersion;
+        this.minorVersion = minorVersion;
+    }
+
+    @Override
+    public int majorVersion() {
+        return majorVersion;
+    }
+
+    @Override
+    public int minorVersion() {
+        return minorVersion;
+    }
+
+    @Override
+    public void writeTo(DirectClassBuilder builder) {
+        builder.setVersion(majorVersion, minorVersion);
+    }
+
+    @Override
+    public String toString() {
+        return String.format("ClassFileVersion[majorVersion=%d, minorVersion=%d]", majorVersion, minorVersion);
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/classfile/impl/ClassHierarchyImpl$CachedClassHierarchyResolver$1.class b/tests/test_data/std/jdk/internal/classfile/impl/ClassHierarchyImpl$CachedClassHierarchyResolver$1.class
new file mode 100644
index 0000000000000000000000000000000000000000..e426b05e6011319cce1a8066aec1982f72a3db89
GIT binary patch
literal 1969
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/classfile/impl/ClassHierarchyImpl$CachedClassHierarchyResolver.class b/tests/test_data/std/jdk/internal/classfile/impl/ClassHierarchyImpl$CachedClassHierarchyResolver.class
new file mode 100644
index 0000000000000000000000000000000000000000..94016b010e6ea29810a5d74714135a7db3c1891e
GIT binary patch
literal 2407
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/classfile/impl/ClassHierarchyImpl$ClassHierarchyInfoImpl.class b/tests/test_data/std/jdk/internal/classfile/impl/ClassHierarchyImpl$ClassHierarchyInfoImpl.class
new file mode 100644
index 0000000000000000000000000000000000000000..132bcdda3f4c39657af139aca9941876a2bc3d0d
GIT binary patch
literal 2236
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/classfile/impl/ClassHierarchyImpl$ClassLoadingClassHierarchyResolver$1.class b/tests/test_data/std/jdk/internal/classfile/impl/ClassHierarchyImpl$ClassLoadingClassHierarchyResolver$1.class
new file mode 100644
index 0000000000000000000000000000000000000000..018724685ad1d40e10269a733ba9d31d5e15a515
GIT binary patch
literal 1693
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/classfile/impl/ClassHierarchyImpl$ClassLoadingClassHierarchyResolver.class b/tests/test_data/std/jdk/internal/classfile/impl/ClassHierarchyImpl$ClassLoadingClassHierarchyResolver.class
new file mode 100644
index 0000000000000000000000000000000000000000..87758c31988ed81642d23261d1b1385d96f8a8c4
GIT binary patch
literal 2309
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/classfile/impl/ClassHierarchyImpl$ResourceParsingClassHierarchyResolver$1.class b/tests/test_data/std/jdk/internal/classfile/impl/ClassHierarchyImpl$ResourceParsingClassHierarchyResolver$1.class
new file mode 100644
index 0000000000000000000000000000000000000000..84e21cd9e2063f348542bdedddad39639cd6a8a1
GIT binary patch
literal 1657
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/classfile/impl/ClassHierarchyImpl$ResourceParsingClassHierarchyResolver.class b/tests/test_data/std/jdk/internal/classfile/impl/ClassHierarchyImpl$ResourceParsingClassHierarchyResolver.class
new file mode 100644
index 0000000000000000000000000000000000000000..0bacb28173489e11d9c3f46d5fe760d7354fe6b3
GIT binary patch
literal 3692
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diff --git a/tests/test_data/std/jdk/internal/classfile/impl/ClassHierarchyImpl$StaticClassHierarchyResolver.class b/tests/test_data/std/jdk/internal/classfile/impl/ClassHierarchyImpl$StaticClassHierarchyResolver.class
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diff --git a/tests/test_data/std/jdk/internal/classfile/impl/ClassHierarchyImpl.class b/tests/test_data/std/jdk/internal/classfile/impl/ClassHierarchyImpl.class
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diff --git a/tests/test_data/std/jdk/internal/classfile/impl/ClassHierarchyImpl.java b/tests/test_data/std/jdk/internal/classfile/impl/ClassHierarchyImpl.java
new file mode 100644
index 00000000..1154b038
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/classfile/impl/ClassHierarchyImpl.java
@@ -0,0 +1,251 @@
+/*
+ * Copyright (c) 2022, 2023, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ *
+ */
+package jdk.internal.classfile.impl;
+
+import java.io.BufferedInputStream;
+import java.io.DataInputStream;
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.UncheckedIOException;
+import java.lang.constant.ClassDesc;
+import java.util.Collection;
+import java.util.HashMap;
+import java.util.Map;
+import java.util.function.Function;
+
+import java.lang.classfile.ClassHierarchyResolver;
+
+import static java.lang.constant.ConstantDescs.CD_Object;
+import static java.lang.classfile.ClassFile.*;
+import static java.util.Objects.requireNonNull;
+
+/**
+ * Class hierarchy resolution framework is answering questions about classes assignability, common classes ancestor and whether the class represents an interface.
+ * All the requests are handled without class loading nor full verification, optionally with incomplete dependencies and with focus on maximum performance.
+ *
+ */
+public final class ClassHierarchyImpl {
+
+    public record ClassHierarchyInfoImpl(ClassDesc superClass, boolean isInterface) implements ClassHierarchyResolver.ClassHierarchyInfo {
+        static final ClassHierarchyResolver.ClassHierarchyInfo OBJECT_INFO = new ClassHierarchyInfoImpl(null, false);
+    }
+
+    public static final ClassHierarchyResolver DEFAULT_RESOLVER =
+            new ClassLoadingClassHierarchyResolver(ClassLoadingClassHierarchyResolver.SYSTEM_CLASS_PROVIDER);
+
+    private final ClassHierarchyResolver resolver;
+
+    /**
+     * Public constructor of <code>ClassHierarchyImpl</code> accepting instances of <code>ClassHierarchyInfoResolver</code> to resolve individual class streams.
+     * @param classHierarchyResolver <code>ClassHierarchyInfoResolver</code> instance
+     */
+    public ClassHierarchyImpl(ClassHierarchyResolver classHierarchyResolver) {
+        requireNonNull(classHierarchyResolver);
+        this.resolver = classHierarchyResolver instanceof CachedClassHierarchyResolver
+                ? classHierarchyResolver
+                : classHierarchyResolver.cached();
+    }
+
+    private ClassHierarchyInfoImpl resolve(ClassDesc classDesc) {
+        var res = resolver.getClassInfo(classDesc);
+        if (res != null) return (ClassHierarchyInfoImpl) res;
+        throw new IllegalArgumentException("Could not resolve class " + classDesc.displayName());
+    }
+
+    /**
+     * Method answering question whether given class is an interface,
+     * responding without the class stream resolution and parsing is preferred in case the interface status is known from previous activities.
+     * @param classDesc class path in form of &lt;package&gt;/&lt;class_name&gt;.class
+     * @return true if the given class name represents an interface
+     */
+    public boolean isInterface(ClassDesc classDesc) {
+        return resolve(classDesc).isInterface();
+    }
+
+    /**
+     * Method resolving common ancestor of two classes
+     * @param symbol1 first class descriptor
+     * @param symbol2 second class descriptor
+     * @return common ancestor class name or <code>null</code> if it could not be identified
+     */
+    public ClassDesc commonAncestor(ClassDesc symbol1, ClassDesc symbol2) {
+        //calculation of common ancestor is a robust (yet fast) way to decide about assignability in incompletely resolved class hierarchy
+        //exact order of symbol loops is critical for performance of the above isAssignableFrom method, so standard situations are resolved in linear time
+        //this method returns null if common ancestor could not be identified
+        if (isInterface(symbol1) || isInterface(symbol2)) return CD_Object;
+        for (var s1 = symbol1; s1 != null; s1 = resolve(s1).superClass()) {
+            for (var s2 = symbol2; s2 != null; s2 = resolve(s2).superClass()) {
+                if (s1.equals(s2)) return s1;
+            }
+        }
+        return null;
+    }
+
+    public boolean isAssignableFrom(ClassDesc thisClass, ClassDesc fromClass) {
+        //extra check if fromClass is an interface is necessary to handle situation when thisClass might not been fully resolved and so it is potentially an unidentified interface
+        //this special corner-case handling has been added based on better success rate of constructing stack maps with simulated broken resolution of classes and interfaces
+        if (isInterface(fromClass)) return resolve(thisClass).superClass() == null;
+        //regular calculation of assignability is based on common ancestor calculation
+        var anc = commonAncestor(thisClass, fromClass);
+        //if common ancestor does not exist (as the class hierarchy could not be fully resolved) we optimistically assume the classes might be accessible
+        //if common ancestor is equal to thisClass then the classes are clearly accessible
+        //if other common ancestor is calculated (which works even when their grandparents could not be resolved) then it is clear that thisClass could not be assigned from fromClass
+        return anc == null || thisClass.equals(anc);
+    }
+
+    public static final class CachedClassHierarchyResolver implements ClassHierarchyResolver {
+        // this instance should not leak out, appears only in cache in order to utilize Map.computeIfAbsent
+        // is already an invalid combination, so it can be compared with equals or as value class safely
+        private static final ClassHierarchyResolver.ClassHierarchyInfo NOPE =
+                new ClassHierarchyInfoImpl(null, true);
+
+        private final Map<ClassDesc, ClassHierarchyInfo> resolvedCache;
+        private final Function<ClassDesc, ClassHierarchyInfo> delegateFunction;
+
+        public CachedClassHierarchyResolver(ClassHierarchyResolver delegate, Map<ClassDesc, ClassHierarchyInfo> resolvedCache) {
+            this.resolvedCache = resolvedCache;
+            this.delegateFunction = new Function<>() {
+                @Override
+                public ClassHierarchyInfo apply(ClassDesc classDesc) {
+                    var ret = delegate.getClassInfo(classDesc);
+                    return ret == null ? NOPE : ret;
+                }
+            };
+        }
+
+        @Override
+        public ClassHierarchyInfo getClassInfo(ClassDesc classDesc) {
+            var ret = resolvedCache.computeIfAbsent(classDesc, delegateFunction);
+            return ret == NOPE ? null : ret;
+        }
+    }
+
+    public static final class ResourceParsingClassHierarchyResolver implements ClassHierarchyResolver {
+        public static final Function<ClassDesc, InputStream> SYSTEM_STREAM_PROVIDER = new Function<>() {
+            @Override
+            public InputStream apply(ClassDesc cd) {
+                return ClassLoader.getSystemClassLoader().getResourceAsStream(Util.toInternalName(cd) + ".class");
+            }
+        };
+        private final Function<ClassDesc, InputStream> streamProvider;
+
+        public ResourceParsingClassHierarchyResolver(Function<ClassDesc, InputStream> classStreamProvider) {
+            this.streamProvider = classStreamProvider;
+        }
+
+        // resolve method looks for the class file using <code>ClassStreamResolver</code> instance and tries to briefly scan it just for minimal information necessary
+        // minimal information includes: identification of the class as interface, obtaining its superclass name and identification of all potential interfaces (to avoid unnecessary future resolutions of them)
+        // empty ClInfo is stored in case of an exception to avoid repeated scanning failures
+        @Override
+        public ClassHierarchyResolver.ClassHierarchyInfo getClassInfo(ClassDesc classDesc) {
+            var ci = streamProvider.apply(classDesc);
+            if (ci == null) return null;
+            try (var in = new DataInputStream(new BufferedInputStream(ci))) {
+                in.skipBytes(8);
+                int cpLength = in.readUnsignedShort();
+                String[] cpStrings = new String[cpLength];
+                int[] cpClasses = new int[cpLength];
+                for (int i = 1; i < cpLength; i++) {
+                    int tag;
+                    switch (tag = in.readUnsignedByte()) {
+                        case TAG_UTF8 -> cpStrings[i] = in.readUTF();
+                        case TAG_CLASS -> cpClasses[i] = in.readUnsignedShort();
+                        case TAG_STRING, TAG_METHODTYPE, TAG_MODULE, TAG_PACKAGE -> in.skipBytes(2);
+                        case TAG_METHODHANDLE -> in.skipBytes(3);
+                        case TAG_INTEGER, TAG_FLOAT, TAG_FIELDREF, TAG_METHODREF, TAG_INTERFACEMETHODREF,
+                                TAG_NAMEANDTYPE, TAG_CONSTANTDYNAMIC, TAG_INVOKEDYNAMIC -> in.skipBytes(4);
+                        case TAG_LONG, TAG_DOUBLE -> {
+                            in.skipBytes(8);
+                            i++;
+                        }
+                        default -> throw new IllegalStateException("Bad tag (" + tag + ") at index (" + i + ")");
+                    }
+                }
+                boolean isInterface = (in.readUnsignedShort() & ACC_INTERFACE) != 0;
+                in.skipBytes(2);
+                int superIndex = in.readUnsignedShort();
+                var superClass = superIndex > 0 ? ClassDesc.ofInternalName(cpStrings[cpClasses[superIndex]]) : null;
+                return new ClassHierarchyInfoImpl(superClass, isInterface);
+            } catch (IOException ioe) {
+                throw new UncheckedIOException(ioe);
+            }
+        }
+    }
+
+    public static final class StaticClassHierarchyResolver implements ClassHierarchyResolver {
+
+        private final Map<ClassDesc, ClassHierarchyInfo> map;
+
+        public StaticClassHierarchyResolver(Collection<ClassDesc> interfaceNames, Map<ClassDesc, ClassDesc> classToSuperClass) {
+            map = HashMap.newHashMap(interfaceNames.size() + classToSuperClass.size() + 1);
+            map.put(CD_Object, ClassHierarchyInfoImpl.OBJECT_INFO);
+            for (var e : classToSuperClass.entrySet())
+                map.put(e.getKey(), ClassHierarchyInfo.ofClass(e.getValue()));
+            for (var i : interfaceNames)
+                map.put(i, ClassHierarchyInfo.ofInterface());
+        }
+
+        @Override
+        public ClassHierarchyInfo getClassInfo(ClassDesc classDesc) {
+            return map.get(classDesc);
+        }
+    }
+
+    public static final class ClassLoadingClassHierarchyResolver implements ClassHierarchyResolver {
+        public static final Function<ClassDesc, Class<?>> SYSTEM_CLASS_PROVIDER = new Function<>() {
+            @Override
+            public Class<?> apply(ClassDesc cd) {
+                try {
+                    return Class.forName(Util.toBinaryName(cd), false, ClassLoader.getSystemClassLoader());
+                } catch (ClassNotFoundException ex) {
+                    return null;
+                }
+            }
+        };
+        private final Function<ClassDesc, Class<?>> classProvider;
+
+        public ClassLoadingClassHierarchyResolver(Function<ClassDesc, Class<?>> classProvider) {
+            this.classProvider = classProvider;
+        }
+
+        @Override
+        public ClassHierarchyInfo getClassInfo(ClassDesc cd) {
+            if (!cd.isClassOrInterface())
+                return null;
+
+            if (cd.equals(CD_Object))
+                return ClassHierarchyInfo.ofClass(null);
+
+            var cl = classProvider.apply(cd);
+            if (cl == null) {
+                return null;
+            }
+
+            return cl.isInterface() ? ClassHierarchyInfo.ofInterface()
+                    : ClassHierarchyInfo.ofClass(cl.getSuperclass().describeConstable().orElseThrow());
+        }
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/classfile/impl/ClassImpl$1.class b/tests/test_data/std/jdk/internal/classfile/impl/ClassImpl$1.class
new file mode 100644
index 0000000000000000000000000000000000000000..cea07d698b8d8068180c766dd38062d0cdf3bd8c
GIT binary patch
literal 1391
zcma)6TTc@~6#k~Pl(tK$D0o2-wFqs21ust}B&I1!Qo#h%N0VWh!s2$e+1--(=5I04
zcN6aq#%F(&@td;RJ^;2!cV^C<^PTV9=GX7<KLFJ5D1!t>(nwlJVN_u8_~4c8>PQ7z
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zo)WYKwFSR#ahu<1%BY1qxXab-idf+NJ?=BSdQ$-CVv)xLEMBnd`86)KC^5$Q@<)iu
zSB!td<pla}%$NZ0Fpl>FuJZp}<*|ek19)s^n7Rh@L5!IxSAOF9XUz2B23Z>-<QGF3
jt|<ygH5D^0qe5W<%UI!>#46T^Z6vFB$Tdp<!;Zf{xCv=-

literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/classfile/impl/ClassImpl.class b/tests/test_data/std/jdk/internal/classfile/impl/ClassImpl.class
new file mode 100644
index 0000000000000000000000000000000000000000..debc845b5eee6b58ba1a1440e62964a966a9514b
GIT binary patch
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/classfile/impl/ClassImpl.java b/tests/test_data/std/jdk/internal/classfile/impl/ClassImpl.java
new file mode 100644
index 00000000..35075cb7
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/classfile/impl/ClassImpl.java
@@ -0,0 +1,224 @@
+/*
+ * Copyright (c) 2022, 2024, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package jdk.internal.classfile.impl;
+
+import java.util.List;
+import java.util.Optional;
+import java.util.function.Consumer;
+import java.lang.classfile.constantpool.ClassEntry;
+import java.lang.reflect.AccessFlag;
+import java.lang.classfile.AccessFlags;
+import java.lang.classfile.Attribute;
+import java.lang.classfile.Attributes;
+import java.lang.classfile.ClassElement;
+import java.lang.classfile.ClassModel;
+import java.lang.classfile.ClassFile;
+import java.lang.classfile.ClassFileVersion;
+import java.lang.classfile.CustomAttribute;
+import java.lang.classfile.constantpool.ConstantPool;
+import java.lang.classfile.FieldModel;
+import java.lang.classfile.Interfaces;
+import java.lang.classfile.MethodModel;
+import java.lang.classfile.Superclass;
+import java.lang.classfile.attribute.InnerClassesAttribute;
+import java.lang.classfile.attribute.ModuleAttribute;
+import java.lang.classfile.attribute.ModuleHashesAttribute;
+import java.lang.classfile.attribute.ModuleMainClassAttribute;
+import java.lang.classfile.attribute.ModulePackagesAttribute;
+import java.lang.classfile.attribute.ModuleResolutionAttribute;
+import java.lang.classfile.attribute.ModuleTargetAttribute;
+import java.lang.classfile.attribute.RuntimeInvisibleAnnotationsAttribute;
+import java.lang.classfile.attribute.RuntimeVisibleAnnotationsAttribute;
+import java.lang.classfile.attribute.SourceDebugExtensionAttribute;
+import java.lang.classfile.attribute.SourceFileAttribute;
+import jdk.internal.access.SharedSecrets;
+
+public final class ClassImpl
+        extends AbstractElement
+        implements ClassModel {
+
+    final ClassReaderImpl reader;
+    private final int attributesPos;
+    private final List<MethodModel> methods;
+    private final List<FieldModel> fields;
+    private List<Attribute<?>> attributes;
+    private List<ClassEntry> interfaces;
+
+    public ClassImpl(byte[] cfbytes, ClassFileImpl context) {
+        this.reader = new ClassReaderImpl(cfbytes, context);
+        int p = reader.interfacesPos;
+        int icnt = reader.readU2(p);
+        p += 2 + icnt * 2;
+        int fcnt = reader.readU2(p);
+        FieldImpl[] fields = new FieldImpl[fcnt];
+        p += 2;
+        for (int i = 0; i < fcnt; ++i) {
+            int startPos = p;
+            int attrStart = p + 6;
+            p = reader.skipAttributeHolder(attrStart);
+            fields[i] = new FieldImpl(reader, startPos, p, attrStart);
+        }
+        this.fields = List.of(fields);
+        int mcnt = reader.readU2(p);
+        MethodImpl[] methods = new MethodImpl[mcnt];
+        p += 2;
+        for (int i = 0; i < mcnt; ++i) {
+            int startPos = p;
+            int attrStart = p + 6;
+            p = reader.skipAttributeHolder(attrStart);
+            methods[i] = new MethodImpl(reader, startPos, p, attrStart);
+        }
+        this.methods = List.of(methods);
+        this.attributesPos = p;
+        reader.setContainedClass(this);
+    }
+
+    public int classfileLength() {
+        return reader.classfileLength();
+    }
+
+    @Override
+    public AccessFlags flags() {
+        return AccessFlags.ofClass(reader.flags());
+    }
+
+    @Override
+    public int majorVersion() {
+        return reader.readU2(6);
+    }
+
+    @Override
+    public int minorVersion() {
+        return reader.readU2(4);
+    }
+
+    @Override
+    public ConstantPool constantPool() {
+        return reader;
+    }
+
+    @Override
+    public ClassEntry thisClass() {
+        return reader.thisClassEntry();
+    }
+
+    @Override
+    public Optional<ClassEntry> superclass() {
+        return reader.superclassEntry();
+    }
+
+    @Override
+    public List<ClassEntry> interfaces() {
+        if (interfaces == null) {
+            int pos = reader.thisClassPos() + 4;
+            int cnt = reader.readU2(pos);
+            pos += 2;
+            var arr = new Object[cnt];
+            for (int i = 0; i < cnt; ++i) {
+                arr[i] = reader.readClassEntry(pos);
+                pos += 2;
+            }
+            this.interfaces = SharedSecrets.getJavaUtilCollectionAccess().listFromTrustedArray(arr);
+        }
+        return interfaces;
+    }
+
+    @Override
+    public List<Attribute<?>> attributes() {
+        if (attributes == null) {
+            attributes = BoundAttribute.readAttributes(this, reader, attributesPos, reader.customAttributes());
+        }
+        return attributes;
+    }
+
+    // ClassModel
+
+    @Override
+    public void forEachElement(Consumer<ClassElement> consumer) {
+        consumer.accept(flags());
+        consumer.accept(ClassFileVersion.of(majorVersion(), minorVersion()));
+        superclass().ifPresent(new Consumer<ClassEntry>() {
+            @Override
+            public void accept(ClassEntry entry) {
+                consumer.accept(Superclass.of(entry));
+            }
+        });
+        consumer.accept(Interfaces.of(interfaces()));
+        fields().forEach(consumer);
+        methods().forEach(consumer);
+        for (Attribute<?> attr : attributes()) {
+            if (attr instanceof ClassElement e)
+                consumer.accept(e);
+        }
+    }
+
+    @Override
+    public List<FieldModel> fields() {
+        return fields;
+    }
+
+    @Override
+    public List<MethodModel> methods() {
+        return methods;
+    }
+
+    @Override
+    public boolean isModuleInfo() {
+        AccessFlags flags = flags();
+        // move to where?
+        return flags.has(AccessFlag.MODULE)
+               && majorVersion() >= ClassFile.JAVA_9_VERSION
+               && thisClass().asInternalName().equals("module-info")
+               && (superclass().isEmpty())
+               && interfaces().isEmpty()
+               && fields().isEmpty()
+               && methods().isEmpty()
+               && verifyModuleAttributes();
+    }
+
+    @Override
+    public String toString() {
+        return String.format("ClassModel[thisClass=%s, flags=%d]", thisClass().name().stringValue(), flags().flagsMask());
+    }
+
+    private boolean verifyModuleAttributes() {
+        if (findAttribute(Attributes.module()).isEmpty())
+            return false;
+
+        return attributes().stream().allMatch(a ->
+                a instanceof ModuleAttribute
+             || a instanceof ModulePackagesAttribute
+             || a instanceof ModuleHashesAttribute
+             || a instanceof ModuleMainClassAttribute
+             || a instanceof ModuleResolutionAttribute
+             || a instanceof ModuleTargetAttribute
+             || a instanceof InnerClassesAttribute
+             || a instanceof SourceFileAttribute
+             || a instanceof SourceDebugExtensionAttribute
+             || a instanceof RuntimeVisibleAnnotationsAttribute
+             || a instanceof RuntimeInvisibleAnnotationsAttribute
+             || a instanceof CustomAttribute);
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/classfile/impl/ClassPrinterImpl$1.class b/tests/test_data/std/jdk/internal/classfile/impl/ClassPrinterImpl$1.class
new file mode 100644
index 0000000000000000000000000000000000000000..d09d9e1b7de0cc869d826cbace89e2ebd6d5266f
GIT binary patch
literal 1304
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/classfile/impl/ClassPrinterImpl$ExceptionHandler.class b/tests/test_data/std/jdk/internal/classfile/impl/ClassPrinterImpl$ExceptionHandler.class
new file mode 100644
index 0000000000000000000000000000000000000000..457420d6f091230ad4107ea20ac501b1b0bfc6ce
GIT binary patch
literal 2042
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/classfile/impl/ClassPrinterImpl$LeafNodeImpl.class b/tests/test_data/std/jdk/internal/classfile/impl/ClassPrinterImpl$LeafNodeImpl.class
new file mode 100644
index 0000000000000000000000000000000000000000..2c569886bd1965eedb3cedd400a8eb5e1041e941
GIT binary patch
literal 2342
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/classfile/impl/ClassPrinterImpl$ListNodeImpl.class b/tests/test_data/std/jdk/internal/classfile/impl/ClassPrinterImpl$ListNodeImpl.class
new file mode 100644
index 0000000000000000000000000000000000000000..8edb98921ace00e3b7e3175c06290964b4e6e714
GIT binary patch
literal 4066
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/classfile/impl/ClassPrinterImpl$MapNodeImpl$PrivateListNodeImpl.class b/tests/test_data/std/jdk/internal/classfile/impl/ClassPrinterImpl$MapNodeImpl$PrivateListNodeImpl.class
new file mode 100644
index 0000000000000000000000000000000000000000..4a8e233d609f09e978703dd830ef668f4ca07288
GIT binary patch
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diff --git a/tests/test_data/std/jdk/internal/classfile/impl/ClassPrinterImpl$MapNodeImpl.class b/tests/test_data/std/jdk/internal/classfile/impl/ClassPrinterImpl$MapNodeImpl.class
new file mode 100644
index 0000000000000000000000000000000000000000..8954cb8f24c597270e5224ea8248e3c9cfb161e7
GIT binary patch
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diff --git a/tests/test_data/std/jdk/internal/classfile/impl/ClassPrinterImpl$Style.class b/tests/test_data/std/jdk/internal/classfile/impl/ClassPrinterImpl$Style.class
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diff --git a/tests/test_data/std/jdk/internal/classfile/impl/ClassPrinterImpl.class b/tests/test_data/std/jdk/internal/classfile/impl/ClassPrinterImpl.class
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HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/classfile/impl/ClassPrinterImpl.java b/tests/test_data/std/jdk/internal/classfile/impl/ClassPrinterImpl.java
new file mode 100644
index 00000000..fac2eba9
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/classfile/impl/ClassPrinterImpl.java
@@ -0,0 +1,1084 @@
+/*
+ * Copyright (c) 2022, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package jdk.internal.classfile.impl;
+
+import java.lang.constant.ConstantDesc;
+import java.lang.constant.DirectMethodHandleDesc;
+import java.lang.reflect.AccessFlag;
+import java.util.AbstractList;
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.Collection;
+import java.util.Collections;
+import java.util.LinkedHashMap;
+import java.util.LinkedList;
+import java.util.List;
+import java.util.Map;
+import java.util.function.BiConsumer;
+import java.util.Set;
+import java.util.function.Consumer;
+import java.util.stream.IntStream;
+import java.util.stream.Stream;
+import java.lang.classfile.Annotation;
+
+import java.lang.classfile.AnnotationElement;
+import java.lang.classfile.AnnotationValue;
+import java.lang.classfile.AnnotationValue.*;
+import java.lang.classfile.Attribute;
+import java.lang.classfile.ClassModel;
+import java.lang.classfile.components.ClassPrinter.*;
+import java.lang.classfile.CodeModel;
+import java.lang.classfile.Instruction;
+import java.lang.classfile.MethodModel;
+import java.lang.classfile.TypeAnnotation;
+import java.lang.classfile.attribute.*;
+import java.lang.classfile.attribute.StackMapFrameInfo.*;
+import java.lang.classfile.constantpool.*;
+import java.lang.classfile.instruction.*;
+
+import static java.lang.classfile.ClassFile.*;
+import java.lang.classfile.CompoundElement;
+import java.lang.classfile.FieldModel;
+import static jdk.internal.classfile.impl.ClassPrinterImpl.Style.*;
+
+public final class ClassPrinterImpl {
+
+    public enum Style { BLOCK, FLOW }
+
+    public record LeafNodeImpl(ConstantDesc name, ConstantDesc value) implements LeafNode {
+
+        @Override
+        public Stream<Node> walk() {
+            return Stream.of(this);
+        }
+    }
+
+    public static sealed class ListNodeImpl extends AbstractList<Node> implements ListNode {
+
+        private final Style style;
+        private final ConstantDesc name;
+        protected final List<Node> nodes;
+
+        public ListNodeImpl(Style style, ConstantDesc name, Stream<Node> nodes) {
+            this.style = style;
+            this.name = name;
+            this.nodes = nodes.toList();
+        }
+
+        protected ListNodeImpl(Style style, ConstantDesc name, List<Node> nodes) {
+            this.style = style;
+            this.name = name;
+            this.nodes = nodes;
+        }
+
+        @Override
+        public ConstantDesc name() {
+            return name;
+        }
+
+        @Override
+        public Stream<Node> walk() {
+            return Stream.concat(Stream.of(this), stream().flatMap(Node::walk));
+        }
+
+        public Style style() {
+            return style;
+        }
+
+        @Override
+        public Node get(int index) {
+            return nodes.get(index);
+        }
+
+        @Override
+        public int size() {
+            return nodes.size();
+        }
+    }
+
+    public static final class MapNodeImpl implements MapNode {
+
+        private static final class PrivateListNodeImpl extends ListNodeImpl {
+            PrivateListNodeImpl(Style style, ConstantDesc name, Node... n) {
+                super(style, name, new ArrayList<>(List.of(n)));
+            }
+        }
+
+        private final Style style;
+        private final ConstantDesc name;
+        private final Map<ConstantDesc, Node> map;
+
+        public MapNodeImpl(Style style, ConstantDesc name) {
+            this.style = style;
+            this.name = name;
+            this.map = new LinkedHashMap<>();
+        }
+
+        @Override
+        public ConstantDesc name() {
+            return name;
+        }
+
+        @Override
+        public Stream<Node> walk() {
+            return Stream.concat(Stream.of(this), values().stream().flatMap(Node::walk));
+        }
+
+        public Style style() {
+            return style;
+        }
+
+        @Override
+        public int size() {
+            return map.size();
+        }
+        @Override
+        public boolean isEmpty() {
+            return map.isEmpty();
+        }
+        @Override
+        public boolean containsKey(Object key) {
+            return map.containsKey(key);
+        }
+        @Override
+        public boolean containsValue(Object value) {
+            return map.containsValue(value);
+        }
+
+        @Override
+        public Node get(Object key) {
+            return map.get(key);
+        }
+
+        @Override
+        public Node put(ConstantDesc key, Node value) {
+            throw new UnsupportedOperationException();
+        }
+
+        @Override
+        public Node remove(Object key) {
+            throw new UnsupportedOperationException();
+        }
+
+        @Override
+        public void putAll(Map<? extends ConstantDesc, ? extends Node> m) {
+            throw new UnsupportedOperationException();
+        }
+
+        @Override
+        public void clear() {
+            throw new UnsupportedOperationException();
+        }
+
+        @Override
+        public Set<ConstantDesc> keySet() {
+            return Collections.unmodifiableSet(map.keySet());
+        }
+
+        @Override
+        public Collection<Node> values() {
+            return Collections.unmodifiableCollection(map.values());
+        }
+
+        @Override
+        public Set<Entry<ConstantDesc, Node>> entrySet() {
+            return Collections.unmodifiableSet(map.entrySet());
+        }
+
+
+        MapNodeImpl with(Node... nodes) {
+            for (var n : nodes) {
+                if (n != null) {
+                    var prev = map.putIfAbsent(n.name(), n);
+                    if (prev != null) {
+                        //nodes with duplicite keys are joined into a list
+                        if (prev instanceof PrivateListNodeImpl list) {
+                            list.nodes.add(n);
+                        } else {
+                            map.put(n.name(), new PrivateListNodeImpl(style, n.name(), prev, n));
+                        }
+                    }
+                }
+            }
+            return this;
+        }
+    }
+
+    private static Node leaf(ConstantDesc name, ConstantDesc value) {
+        return new LeafNodeImpl(name, value);
+    }
+
+    private static Node[] leafs(ConstantDesc... namesAndValues) {
+        if ((namesAndValues.length & 1) > 0)
+            throw new AssertionError("Odd number of arguments: " + Arrays.toString(namesAndValues));
+        var nodes = new Node[namesAndValues.length >> 1];
+        for (int i = 0, j = 0; i < nodes.length; i ++) {
+            nodes[i] = leaf(namesAndValues[j++], namesAndValues[j++]);
+        }
+        return nodes;
+    }
+
+    private static Node list(ConstantDesc listName, ConstantDesc itemsName, Stream<ConstantDesc> values) {
+        return new ListNodeImpl(FLOW, listName, values.map(v -> leaf(itemsName, v)));
+    }
+
+    private static Node map(ConstantDesc mapName, ConstantDesc... keysAndValues) {
+        return new MapNodeImpl(FLOW, mapName).with(leafs(keysAndValues));
+    }
+
+    private static final String NL = System.lineSeparator();
+
+    private static final char[] DIGITS = "0123456789ABCDEF".toCharArray();
+
+    private static void escape(int c, StringBuilder sb) {
+        switch (c) {
+            case '\\'  -> sb.append('\\').append('\\');
+            case '"' -> sb.append('\\').append('"');
+            case '\b' -> sb.append('\\').append('b');
+            case '\n' -> sb.append('\\').append('n');
+            case '\t' -> sb.append('\\').append('t');
+            case '\f' -> sb.append('\\').append('f');
+            case '\r' -> sb.append('\\').append('r');
+            default -> {
+                if (c >= 0x20 && c < 0x7f) {
+                    sb.append((char)c);
+                } else {
+                    sb.append('\\').append('u').append(DIGITS[(c >> 12) & 0xf])
+                            .append(DIGITS[(c >> 8) & 0xf]).append(DIGITS[(c >> 4) & 0xf]).append(DIGITS[(c) & 0xf]);
+                }
+            }
+        }
+    }
+
+    public static void toYaml(Node node, Consumer<String> out) {
+        toYaml(0, false, new ListNodeImpl(BLOCK, null, Stream.of(node)), out);
+        out.accept(NL);
+    }
+
+    private static void toYaml(int indent, boolean skipFirstIndent, Node node, Consumer<String> out) {
+        switch (node) {
+            case LeafNode leaf -> {
+                out.accept(quoteAndEscapeYaml(leaf.value()));
+            }
+            case ListNodeImpl list -> {
+                switch (list.style()) {
+                    case FLOW -> {
+                        out.accept("[");
+                        boolean first = true;
+                        for (var n : list) {
+                            if (first) first = false;
+                            else out.accept(", ");
+                            toYaml(0, false, n, out);
+                        }
+                        out.accept("]");
+                    }
+                    case BLOCK -> {
+                        for (var n : list) {
+                            out.accept(NL + "    ".repeat(indent) + "  - ");
+                            toYaml(indent + 1, true, n, out);
+                        }
+                    }
+                }
+            }
+            case MapNodeImpl map -> {
+                switch (map.style()) {
+                    case FLOW -> {
+                        out.accept("{");
+                        boolean first = true;
+                        for (var n : map.values()) {
+                            if (first) first = false;
+                            else out.accept(", ");
+                            out.accept(quoteAndEscapeYaml(n.name()) + ": ");
+                            toYaml(0, false, n, out);
+                        }
+                        out.accept("}");
+                    }
+                    case BLOCK -> {
+                        for (var n : map.values()) {
+                            if (skipFirstIndent) {
+                                skipFirstIndent = false;
+                            } else {
+                                out.accept(NL + "    ".repeat(indent));
+                            }
+                            out.accept(quoteAndEscapeYaml(n.name()) + ": ");
+                            toYaml(n instanceof ListNodeImpl pl && pl.style() == BLOCK ? indent : indent + 1, false, n, out);
+                        }
+                    }
+                }
+            }
+        }
+    }
+
+    private static String quoteAndEscapeYaml(ConstantDesc value) {
+        String s = String.valueOf(value);
+        if (value instanceof Number) return s;
+        if (s.length() == 0) return "''";
+        var sb = new StringBuilder(s.length() << 1);
+        s.chars().forEach(c -> {
+            switch (c) {
+                case '\''  -> sb.append("''");
+                default -> escape(c, sb);
+            }});
+        String esc = sb.toString();
+        if (esc.length() != s.length()) return "'" + esc + "'";
+        switch (esc.charAt(0)) {
+            case '-', '?', ':', ',', '[', ']', '{', '}', '#', '&', '*', '!', '|', '>', '\'', '"', '%', '@', '`':
+                return "'" + esc + "'";
+        }
+        for (int i = 1; i < esc.length(); i++) {
+            switch (esc.charAt(i)) {
+                case ',', '[', ']', '{', '}':
+                    return "'" + esc + "'";
+            }
+        }
+        return esc;
+    }
+
+    public static void toJson(Node node, Consumer<String> out) {
+        toJson(1, true, node, out);
+        out.accept(NL);
+    }
+
+    private static void toJson(int indent, boolean skipFirstIndent, Node node, Consumer<String> out) {
+        switch (node) {
+            case LeafNode leaf -> {
+                out.accept(quoteAndEscapeJson(leaf.value()));
+            }
+            case ListNodeImpl list -> {
+                out.accept("[");
+                boolean first = true;
+                switch (list.style()) {
+                    case FLOW -> {
+                        for (var n : list) {
+                            if (first) first = false;
+                            else out.accept(", ");
+                            toJson(0, false, n, out);
+                        }
+                    }
+                    case BLOCK -> {
+                        for (var n : list) {
+                            if (first) first = false;
+                            else out.accept(",");
+                            out.accept(NL + "    ".repeat(indent));
+                            toJson(indent + 1, true, n, out);
+                        }
+                    }
+                }
+                out.accept("]");
+            }
+            case MapNodeImpl map -> {
+                switch (map.style()) {
+                    case FLOW -> {
+                        out.accept("{");
+                        boolean first = true;
+                        for (var n : map.values()) {
+                            if (first) first = false;
+                            else out.accept(", ");
+                            out.accept(quoteAndEscapeJson(n.name().toString()) + ": ");
+                            toJson(0, false, n, out);
+                        }
+                    }
+                    case BLOCK -> {
+                        if (skipFirstIndent) out.accept("  { ");
+                        else out.accept("{");
+                        boolean first = true;
+                        for (var n : map.values()) {
+                            if (first) first = false;
+                            else out.accept(",");
+                            if (skipFirstIndent) skipFirstIndent = false;
+                            else out.accept(NL + "    ".repeat(indent));
+                            out.accept(quoteAndEscapeJson(n.name().toString()) + ": ");
+                            toJson(indent + 1, false, n, out);
+                        }
+                    }
+                }
+                out.accept("}");
+            }
+        }
+    }
+
+    private static String quoteAndEscapeJson(ConstantDesc value) {
+        String s = String.valueOf(value);
+        if (value instanceof Number) return s;
+        var sb = new StringBuilder(s.length() << 1);
+        sb.append('"');
+        s.chars().forEach(c -> escape(c, sb));
+        sb.append('"');
+        return sb.toString();
+    }
+
+    public static void toXml(Node node, Consumer<String> out) {
+        out.accept("<?xml version = '1.0'?>");
+        toXml(0, false, node, out);
+        out.accept(NL);
+    }
+
+    private static void toXml(int indent, boolean skipFirstIndent, Node node, Consumer<String> out) {
+        var name = toXmlName(node.name().toString());
+        switch (node) {
+            case LeafNode leaf -> {
+                out.accept("<" + name + ">");
+                out.accept(xmlEscape(leaf.value()));
+            }
+            case ListNodeImpl list -> {
+                switch (list.style()) {
+                    case FLOW -> {
+                        out.accept("<" + name + ">");
+                        for (var n : list) {
+                            toXml(0, false, n, out);
+                        }
+                    }
+                    case BLOCK -> {
+                        if (!skipFirstIndent)
+                            out.accept(NL + "    ".repeat(indent));
+                        out.accept("<" + name + ">");
+                        for (var n : list) {
+                            out.accept(NL + "    ".repeat(indent + 1));
+                            toXml(indent + 1, true, n, out);
+                        }
+                    }
+                }
+            }
+            case MapNodeImpl map -> {
+                switch (map.style()) {
+                    case FLOW -> {
+                        out.accept("<" + name + ">");
+                        for (var n : map.values()) {
+                            toXml(0, false, n, out);
+                        }
+                    }
+                    case BLOCK -> {
+                        if (!skipFirstIndent)
+                            out.accept(NL + "    ".repeat(indent));
+                        out.accept("<" + name + ">");
+                        for (var n : map.values()) {
+                            out.accept(NL + "    ".repeat(indent + 1));
+                            toXml(indent + 1, true, n, out);
+                        }
+                    }
+                }
+            }
+        }
+        out.accept("</" + name + ">");
+    }
+
+    private static String xmlEscape(ConstantDesc value) {
+        var s = String.valueOf(value);
+        var sb = new StringBuilder(s.length() << 1);
+        s.chars().forEach(c -> {
+        switch (c) {
+            case '<'  -> sb.append("&lt;");
+            case '>'  -> sb.append("&gt;");
+            case '"'  -> sb.append("&quot;");
+            case '&'  -> sb.append("&amp;");
+            case '\''  -> sb.append("&apos;");
+            default -> escape(c, sb);
+        }});
+        return sb.toString();
+    }
+
+    private static String toXmlName(String name) {
+        if (Character.isDigit(name.charAt(0)))
+            name = "_" + name;
+        return name.replaceAll("[^A-Za-z_0-9]", "_");
+    }
+
+    private static Node[] elementValueToTree(AnnotationValue v) {
+        return switch (v) {
+            case OfString cv -> leafs("string", String.valueOf(cv.constantValue()));
+            case OfDouble cv -> leafs("double", String.valueOf(cv.constantValue()));
+            case OfFloat cv -> leafs("float", String.valueOf(cv.constantValue()));
+            case OfLong cv -> leafs("long", String.valueOf(cv.constantValue()));
+            case OfInteger cv -> leafs("int", String.valueOf(cv.constantValue()));
+            case OfShort cv -> leafs("short", String.valueOf(cv.constantValue()));
+            case OfCharacter cv -> leafs("char", String.valueOf(cv.constantValue()));
+            case OfByte cv -> leafs("byte", String.valueOf(cv.constantValue()));
+            case OfBoolean cv -> leafs("boolean", String.valueOf((int)cv.constantValue() != 0));
+            case OfClass clv -> leafs("class", clv.className().stringValue());
+            case OfEnum ev -> leafs("enum class", ev.className().stringValue(),
+                                    "constant name", ev.constantName().stringValue());
+            case OfAnnotation av -> leafs("annotation class", av.annotation().className().stringValue());
+            case OfArray av -> new Node[]{new ListNodeImpl(FLOW, "array", av.values().stream().map(
+                    ev -> new MapNodeImpl(FLOW, "value").with(elementValueToTree(ev))))};
+        };
+    }
+
+    private static Node elementValuePairsToTree(List<AnnotationElement> evps) {
+        return new ListNodeImpl(FLOW, "values", evps.stream().map(evp -> new MapNodeImpl(FLOW, "pair").with(
+                leaf("name", evp.name().stringValue()),
+                new MapNodeImpl(FLOW, "value").with(elementValueToTree(evp.value())))));
+    }
+
+    private static Stream<ConstantDesc> convertVTIs(CodeAttribute lr, List<VerificationTypeInfo> vtis) {
+        return vtis.stream().mapMulti((vti, ret) -> {
+            switch (vti) {
+                case SimpleVerificationTypeInfo s -> {
+                    switch (s) {
+                        case ITEM_DOUBLE -> {
+                            ret.accept("double");
+                            ret.accept("double2");
+                        }
+                        case ITEM_FLOAT ->
+                            ret.accept("float");
+                        case ITEM_INTEGER ->
+                            ret.accept("int");
+                        case ITEM_LONG ->  {
+                            ret.accept("long");
+                            ret.accept("long2");
+                        }
+                        case ITEM_NULL -> ret.accept("null");
+                        case ITEM_TOP -> ret.accept("?");
+                        case ITEM_UNINITIALIZED_THIS -> ret.accept("THIS");
+                    }
+                }
+                case ObjectVerificationTypeInfo o ->
+                    ret.accept(o.className().name().stringValue());
+                case UninitializedVerificationTypeInfo u ->
+                    ret.accept("UNINITIALIZED @" + lr.labelToBci(u.newTarget()));
+            }
+        });
+    }
+
+    private record ExceptionHandler(int start, int end, int handler, String catchType) {}
+
+    public static MapNode modelToTree(CompoundElement<?> model, Verbosity verbosity) {
+        return switch(model) {
+            case ClassModel cm -> classToTree(cm, verbosity);
+            case FieldModel fm -> fieldToTree(fm, verbosity);
+            case MethodModel mm -> methodToTree(mm, verbosity);
+            case CodeModel com -> codeToTree((CodeAttribute)com, verbosity);
+        };
+    }
+
+    private static MapNode classToTree(ClassModel clm, Verbosity verbosity) {
+        return new MapNodeImpl(BLOCK, "class")
+                .with(leaf("class name", clm.thisClass().asInternalName()),
+                      leaf("version", clm.majorVersion() + "." + clm.minorVersion()),
+                      list("flags", "flag", clm.flags().flags().stream().map(AccessFlag::name)),
+                      leaf("superclass", clm.superclass().map(ClassEntry::asInternalName).orElse("")),
+                      list("interfaces", "interface", clm.interfaces().stream().map(ClassEntry::asInternalName)),
+                      list("attributes", "attribute", clm.attributes().stream().map(Attribute::attributeName)))
+                .with(constantPoolToTree(clm.constantPool(), verbosity))
+                .with(attributesToTree(clm.attributes(), verbosity))
+                .with(new ListNodeImpl(BLOCK, "fields", clm.fields().stream().map(f ->
+                    fieldToTree(f, verbosity))))
+                .with(new ListNodeImpl(BLOCK, "methods", clm.methods().stream().map(mm ->
+                    methodToTree(mm, verbosity))));
+    }
+
+    private static Node[] constantPoolToTree(ConstantPool cp, Verbosity verbosity) {
+        if (verbosity == Verbosity.TRACE_ALL) {
+            var cpNode = new MapNodeImpl(BLOCK, "constant pool");
+            for (PoolEntry e : cp) {
+                cpNode.with(new MapNodeImpl(FLOW, e.index())
+                        .with(leaf("tag", switch (e.tag()) {
+                            case TAG_UTF8 -> "Utf8";
+                            case TAG_INTEGER -> "Integer";
+                            case TAG_FLOAT -> "Float";
+                            case TAG_LONG -> "Long";
+                            case TAG_DOUBLE -> "Double";
+                            case TAG_CLASS -> "Class";
+                            case TAG_STRING -> "String";
+                            case TAG_FIELDREF -> "Fieldref";
+                            case TAG_METHODREF -> "Methodref";
+                            case TAG_INTERFACEMETHODREF -> "InterfaceMethodref";
+                            case TAG_NAMEANDTYPE -> "NameAndType";
+                            case TAG_METHODHANDLE -> "MethodHandle";
+                            case TAG_METHODTYPE -> "MethodType";
+                            case TAG_CONSTANTDYNAMIC -> "Dynamic";
+                            case TAG_INVOKEDYNAMIC -> "InvokeDynamic";
+                            case TAG_MODULE -> "Module";
+                            case TAG_PACKAGE -> "Package";
+                            default -> throw new AssertionError("Unknown CP tag: " + e.tag());
+                        }))
+                        .with(switch (e) {
+                            case ClassEntry ce -> leafs(
+                                "class name index", ce.name().index(),
+                                "class internal name", ce.asInternalName());
+                            case ModuleEntry me -> leafs(
+                                "module name index", me.name().index(),
+                                "module name", me.name().stringValue());
+                            case PackageEntry pe -> leafs(
+                                "package name index", pe.name().index(),
+                                "package name", pe.name().stringValue());
+                            case StringEntry se -> leafs(
+                                    "value index", se.utf8().index(),
+                                    "value", se.stringValue());
+                            case MemberRefEntry mre -> leafs(
+                                    "owner index", mre.owner().index(),
+                                    "name and type index", mre.nameAndType().index(),
+                                    "owner", mre.owner().name().stringValue(),
+                                    "name", mre.name().stringValue(),
+                                    "type", mre.type().stringValue());
+                            case NameAndTypeEntry nte -> leafs(
+                                    "name index", nte.name().index(),
+                                    "type index", nte.type().index(),
+                                    "name", nte.name().stringValue(),
+                                    "type", nte.type().stringValue());
+                            case MethodHandleEntry mhe -> leafs(
+                                    "reference kind", DirectMethodHandleDesc.Kind.valueOf(mhe.kind()).name(),
+                                    "reference index", mhe.reference().index(),
+                                    "owner", mhe.reference().owner().asInternalName(),
+                                    "name", mhe.reference().name().stringValue(),
+                                    "type", mhe.reference().type().stringValue());
+                            case MethodTypeEntry mte -> leafs(
+                                    "descriptor index", mte.descriptor().index(),
+                                    "descriptor", mte.descriptor().stringValue());
+                            case DynamicConstantPoolEntry dcpe -> new Node[] {
+                                leaf("bootstrap method handle index", dcpe.bootstrap().bootstrapMethod().index()),
+                                list("bootstrap method arguments indexes",
+                                        "index", dcpe.bootstrap().arguments().stream().map(en -> en.index())),
+                                leaf("name and type index", dcpe.nameAndType().index()),
+                                leaf("name", dcpe.name().stringValue()),
+                                leaf("type", dcpe.type().stringValue())};
+                            case AnnotationConstantValueEntry ve -> leafs(
+                                "value", String.valueOf(ve.constantValue())
+                            );
+                        }));
+            }
+            return new Node[]{cpNode};
+        } else {
+            return new Node[0];
+        }
+    }
+
+    private static Node frameToTree(ConstantDesc name, CodeAttribute lr, StackMapFrameInfo f) {
+        return new MapNodeImpl(FLOW, name).with(
+                list("locals", "item", convertVTIs(lr, f.locals())),
+                list("stack", "item", convertVTIs(lr, f.stack())));
+    }
+
+    private static MapNode fieldToTree(FieldModel f, Verbosity verbosity) {
+        return new MapNodeImpl(BLOCK, "field")
+                            .with(leaf("field name", f.fieldName().stringValue()),
+                                  list("flags",
+                                          "flag", f.flags().flags().stream().map(AccessFlag::name)),
+                                  leaf("field type", f.fieldType().stringValue()),
+                                  list("attributes",
+                                          "attribute", f.attributes().stream().map(Attribute::attributeName)))
+                            .with(attributesToTree(f.attributes(), verbosity));
+    }
+
+    public static MapNode methodToTree(MethodModel m, Verbosity verbosity) {
+        return new MapNodeImpl(BLOCK, "method")
+                .with(leaf("method name", m.methodName().stringValue()),
+                      list("flags",
+                              "flag", m.flags().flags().stream().map(AccessFlag::name)),
+                      leaf("method type", m.methodType().stringValue()),
+                      list("attributes",
+                              "attribute", m.attributes().stream().map(Attribute::attributeName)))
+                .with(attributesToTree(m.attributes(), verbosity))
+                .with(codeToTree((CodeAttribute)m.code().orElse(null), verbosity));
+    }
+
+    private static MapNode codeToTree(CodeAttribute com, Verbosity verbosity) {
+        if (verbosity != Verbosity.MEMBERS_ONLY && com != null) {
+            var codeNode = new MapNodeImpl(BLOCK, "code");
+            codeNode.with(leaf("max stack", com.maxStack()));
+            codeNode.with(leaf("max locals", com.maxLocals()));
+            codeNode.with(list("attributes",
+                    "attribute", com.attributes().stream().map(Attribute::attributeName)));
+            var stackMap = new MapNodeImpl(BLOCK, "stack map frames");
+            var visibleTypeAnnos = new LinkedHashMap<Integer, List<TypeAnnotation>>();
+            var invisibleTypeAnnos = new LinkedHashMap<Integer, List<TypeAnnotation>>();
+            List<LocalVariableInfo> locals = List.of();
+            for (var attr : com.attributes()) {
+                if (attr instanceof StackMapTableAttribute smta) {
+                    codeNode.with(stackMap);
+                    for (var smf : smta.entries()) {
+                        stackMap.with(frameToTree(com.labelToBci(smf.target()), com, smf));
+                    }
+                } else if (verbosity == Verbosity.TRACE_ALL && attr != null) switch (attr) {
+                    case LocalVariableTableAttribute lvta -> {
+                        locals = lvta.localVariables();
+                        codeNode.with(new ListNodeImpl(BLOCK, "local variables",
+                                IntStream.range(0, locals.size()).mapToObj(i -> {
+                                    var lv = lvta.localVariables().get(i);
+                                    return map(i + 1,
+                                        "start", lv.startPc(),
+                                        "end", lv.startPc() + lv.length(),
+                                        "slot", lv.slot(),
+                                        "name", lv.name().stringValue(),
+                                        "type", lv.type().stringValue());
+                                })));
+                    }
+                    case LocalVariableTypeTableAttribute lvtta -> {
+                        codeNode.with(new ListNodeImpl(BLOCK, "local variable types",
+                                IntStream.range(0, lvtta.localVariableTypes().size()).mapToObj(i -> {
+                                    var lvt = lvtta.localVariableTypes().get(i);
+                                    return map(i + 1,
+                                        "start", lvt.startPc(),
+                                        "end", lvt.startPc() + lvt.length(),
+                                        "slot", lvt.slot(),
+                                        "name", lvt.name().stringValue(),
+                                        "signature", lvt.signature().stringValue());
+                                })));
+                    }
+                    case LineNumberTableAttribute lnta -> {
+                        codeNode.with(new ListNodeImpl(BLOCK, "line numbers",
+                                IntStream.range(0, lnta.lineNumbers().size()).mapToObj(i -> {
+                                    var ln = lnta.lineNumbers().get(i);
+                                    return map(i + 1,
+                                        "start", ln.startPc(),
+                                        "line number", ln.lineNumber());
+                                })));
+                    }
+                    case CharacterRangeTableAttribute crta -> {
+                        codeNode.with(new ListNodeImpl(BLOCK, "character ranges",
+                                IntStream.range(0, crta.characterRangeTable().size()).mapToObj(i -> {
+                                    var cr = crta.characterRangeTable().get(i);
+                                    return map(i + 1,
+                                        "start", cr.startPc(),
+                                        "end", cr.endPc(),
+                                        "range start", cr.characterRangeStart(),
+                                        "range end", cr.characterRangeEnd(),
+                                        "flags", cr.flags());
+                                })));
+                    }
+                    case RuntimeVisibleTypeAnnotationsAttribute rvtaa ->
+                        rvtaa.annotations().forEach(a -> forEachOffset(a, com, (off, an) ->
+                                visibleTypeAnnos.computeIfAbsent(off, o -> new LinkedList<>()).add(an)));
+                    case RuntimeInvisibleTypeAnnotationsAttribute ritaa ->
+                        ritaa.annotations().forEach(a -> forEachOffset(a, com, (off, an) ->
+                                invisibleTypeAnnos.computeIfAbsent(off, o -> new LinkedList<>()).add(an)));
+                    case Object o -> {}
+                }
+            }
+            codeNode.with(attributesToTree(com.attributes(), verbosity));
+            if (!stackMap.containsKey(0)) {
+                codeNode.with(new MapNodeImpl(FLOW, "//stack map frame @0").with(
+                    list("locals", "item", convertVTIs(com, StackMapDecoder.initFrameLocals(com.parent().get()))),
+                    list("stack", "item", Stream.of())));
+            }
+            var excHandlers = com.exceptionHandlers().stream().map(exc -> new ExceptionHandler(
+                    com.labelToBci(exc.tryStart()),
+                    com.labelToBci(exc.tryEnd()),
+                    com.labelToBci(exc.handler()),
+                    exc.catchType().map(ct -> ct.name().stringValue()).orElse(null))).toList();
+            int bci = 0;
+            for (var coe : com) {
+                if (coe instanceof Instruction ins) {
+                    var frame = stackMap.get(bci);
+                    if (frame != null) {
+                        codeNode.with(new MapNodeImpl(FLOW, "//stack map frame @" + bci)
+                                .with(((MapNodeImpl)frame).values().toArray(new Node[2])));
+                    }
+                    var annos = invisibleTypeAnnos.get(bci);
+                    if (annos != null) {
+                        codeNode.with(typeAnnotationsToTree(FLOW, "//invisible type annotations @" + bci, annos));
+                    }
+                    annos = visibleTypeAnnos.get(bci);
+                    if (annos != null) {
+                        codeNode.with(typeAnnotationsToTree(FLOW, "//visible type annotations @" + bci, annos));
+                    }
+                    for (int i = 0; i < excHandlers.size(); i++) {
+                        var exc = excHandlers.get(i);
+                        if (exc.start() == bci) {
+                            codeNode.with(map("//try block " + (i + 1) + " start",
+                                    "start", exc.start(),
+                                    "end", exc.end(),
+                                    "handler", exc.handler(),
+                                    "catch type", exc.catchType()));
+                        }
+                        if (exc.end() == bci) {
+                            codeNode.with(map("//try block " + (i + 1) + " end",
+                                    "start", exc.start(),
+                                    "end", exc.end(),
+                                    "handler", exc.handler(),
+                                    "catch type", exc.catchType()));
+                        }
+                        if (exc.handler() == bci) {
+                            codeNode.with(map("//exception handler " + (i + 1) + " start",
+                                    "start", exc.start(),
+                                    "end", exc.end(),
+                                    "handler", exc.handler(),
+                                    "catch type", exc.catchType()));
+                        }
+                    }
+                    var in = new MapNodeImpl(FLOW, bci).with(leaf("opcode", ins.opcode().name()));
+                    codeNode.with(in);
+                    switch (coe) {
+                        case IncrementInstruction inc ->  in.with(leafs(
+                                "slot", inc.slot(),
+                                "const", inc.constant()))
+                                .with(localInfoToTree(locals, inc.slot(), bci));
+                        case LoadInstruction lv ->  in.with(leaf(
+                                "slot", lv.slot()))
+                                .with(localInfoToTree(locals, lv.slot(), bci));
+                        case StoreInstruction lv ->  in.with(leaf(
+                                "slot", lv.slot()))
+                                .with(localInfoToTree(locals, lv.slot(), bci));
+                        case FieldInstruction fa -> in.with(leafs(
+                                "owner", fa.owner().name().stringValue(),
+                                "field name", fa.name().stringValue(),
+                                "field type", fa.type().stringValue()));
+                        case InvokeInstruction inv -> in.with(leafs(
+                                "owner", inv.owner().name().stringValue(),
+                                "method name", inv.name().stringValue(),
+                                "method type", inv.type().stringValue()));
+                        case InvokeDynamicInstruction invd -> {
+                            in.with(leafs(
+                                "name", invd.name().stringValue(),
+                                "descriptor", invd.type().stringValue(),
+                                "bootstrap method", invd.bootstrapMethod().kind().name()
+                                     + " " + Util.toInternalName(invd.bootstrapMethod().owner())
+                                     + "::" + invd.bootstrapMethod().methodName()));
+                            in.with(list("arguments", "arg", invd.bootstrapArgs().stream()));
+                        }
+                        case NewObjectInstruction newo -> in.with(leaf(
+                                "type", newo.className().name().stringValue()));
+                        case NewPrimitiveArrayInstruction newa -> in.with(leafs(
+                                "dimensions", 1,
+                                "descriptor", newa.typeKind().typeName()));
+                        case NewReferenceArrayInstruction newa -> in.with(leafs(
+                                "dimensions", 1,
+                                "descriptor", newa.componentType().name().stringValue()));
+                        case NewMultiArrayInstruction newa -> in.with(leafs(
+                                "dimensions", newa.dimensions(),
+                                "descriptor", newa.arrayType().name().stringValue()));
+                        case TypeCheckInstruction tch -> in.with(leaf(
+                                "type", tch.type().name().stringValue()));
+                        case ConstantInstruction cons -> in.with(leaf(
+                                "constant value", cons.constantValue()));
+                        case BranchInstruction br -> in.with(leaf(
+                                "target", com.labelToBci(br.target())));
+                        case LookupSwitchInstruction si -> in.with(list(
+                                "targets", "target", Stream.concat(Stream.of(si.defaultTarget())
+                                        .map(com::labelToBci), si.cases().stream()
+                                                .map(sc -> com.labelToBci(sc.target())))));
+                        case TableSwitchInstruction si -> in.with(list(
+                                "targets", "target", Stream.concat(Stream.of(si.defaultTarget())
+                                        .map(com::labelToBci), si.cases().stream()
+                                                .map(sc -> com.labelToBci(sc.target())))));
+                        case DiscontinuedInstruction.JsrInstruction jsr -> in.with(leaf(
+                                "target", com.labelToBci(jsr.target())));
+                        case DiscontinuedInstruction.RetInstruction ret ->  in.with(leaf(
+                                "slot", ret.slot()));
+                        default -> {}
+                    }
+                    bci += ins.sizeInBytes();
+                }
+            }
+            if (!excHandlers.isEmpty()) {
+                var handlersNode = new MapNodeImpl(BLOCK, "exception handlers");
+                codeNode.with(handlersNode);
+                for (int i = 0; i < excHandlers.size(); i++) {
+                    var exc = excHandlers.get(i);
+                    handlersNode.with(map("handler " + (i + 1),
+                            "start", exc.start(),
+                            "end", exc.end(),
+                            "handler", exc.handler(),
+                            "type", exc.catchType()));
+                }
+            }
+            return codeNode;
+        }
+        return null;
+    }
+
+    private static Node[] attributesToTree(List<Attribute<?>> attributes, Verbosity verbosity) {
+        var nodes = new LinkedList<Node>();
+        if (verbosity != Verbosity.MEMBERS_ONLY) for (var attr : attributes) {
+            switch (attr) {
+                case BootstrapMethodsAttribute bma ->
+                    nodes.add(new ListNodeImpl(BLOCK, "bootstrap methods", bma.bootstrapMethods().stream().map(
+                    bm -> {
+                        var mh = bm.bootstrapMethod();
+                        var mref = mh.reference();
+                        var bmNode = new MapNodeImpl(FLOW, "bm");
+                        bmNode.with(leafs(
+                                "index", bm.bsmIndex(),
+                                "kind", DirectMethodHandleDesc.Kind.valueOf(mh.kind(),
+                                        mref instanceof InterfaceMethodRefEntry).name(),
+                                "owner", mref.owner().asInternalName(),
+                                "name", mref.nameAndType().name().stringValue()));
+                        bmNode.with(list("args", "arg", bm.arguments().stream().map(LoadableConstantEntry::constantValue)));
+                        return bmNode;
+                    })));
+                case ConstantValueAttribute cva ->
+                    nodes.add(leaf("constant value", cva.constant().constantValue()));
+                case NestHostAttribute nha ->
+                    nodes.add(leaf("nest host", nha.nestHost().name().stringValue()));
+                case NestMembersAttribute nma ->
+                    nodes.add(list("nest members", "member", nma.nestMembers().stream()
+                            .map(mp -> mp.name().stringValue())));
+                case PermittedSubclassesAttribute psa ->
+                    nodes.add(list("permitted subclasses", "subclass", psa.permittedSubclasses().stream()
+                            .map(e -> e.name().stringValue())));
+                default -> {}
+            }
+            if (verbosity == Verbosity.TRACE_ALL) switch (attr) {
+                case EnclosingMethodAttribute ema ->
+                    nodes.add(map("enclosing method",
+                            "class", ema.enclosingClass().name().stringValue(),
+                            "method name", ema.enclosingMethodName()
+                                    .map(Utf8Entry::stringValue).orElse("null"),
+                            "method type", ema.enclosingMethodType()
+                                    .map(Utf8Entry::stringValue).orElse("null")));
+                case ExceptionsAttribute exa ->
+                    nodes.add(list("exceptions", "exc", exa.exceptions().stream()
+                            .map(e -> e.name().stringValue())));
+                case InnerClassesAttribute ica ->
+                    nodes.add(new ListNodeImpl(BLOCK, "inner classes", ica.classes().stream()
+                            .map(ic -> new MapNodeImpl(FLOW, "cls").with(
+                                leaf("inner class", ic.innerClass().name().stringValue()),
+                                leaf("outer class", ic.outerClass()
+                                        .map(cle -> cle.name().stringValue()).orElse("null")),
+                                leaf("inner name", ic.innerName().map(Utf8Entry::stringValue).orElse("null")),
+                                list("flags", "flag", ic.flags().stream().map(AccessFlag::name))))));
+                case MethodParametersAttribute mpa -> {
+                    var n = new MapNodeImpl(BLOCK, "method parameters");
+                    for (int i = 0; i < mpa.parameters().size(); i++) {
+                        var p = mpa.parameters().get(i);
+                        n.with(new MapNodeImpl(FLOW, i + 1).with(
+                                leaf("name", p.name().map(Utf8Entry::stringValue).orElse("null")),
+                                list("flags", "flag", p.flags().stream().map(AccessFlag::name))));
+                    }
+                }
+                case ModuleAttribute ma ->
+                    nodes.add(new MapNodeImpl(BLOCK, "module")
+                            .with(leaf("name", ma.moduleName().name().stringValue()),
+                                  list("flags","flag", ma.moduleFlags().stream().map(AccessFlag::name)),
+                                  leaf("version", ma.moduleVersion().map(Utf8Entry::stringValue).orElse("null")),
+                                  list("uses", "class", ma.uses().stream().map(ce -> ce.name().stringValue())),
+                                  new ListNodeImpl(BLOCK, "requires", ma.requires().stream().map(req ->
+                                    new MapNodeImpl(FLOW, "req").with(
+                                            leaf("name", req.requires().name().stringValue()),
+                                            list("flags", "flag", req.requiresFlags().stream()
+                                                    .map(AccessFlag::name)),
+                                            leaf("version", req.requiresVersion()
+                                                    .map(Utf8Entry::stringValue).orElse(null))))),
+                                  new ListNodeImpl(BLOCK, "exports", ma.exports().stream().map(exp ->
+                                    new MapNodeImpl(FLOW, "exp").with(
+                                            leaf("package", exp.exportedPackage().asSymbol().name()),
+                                            list("flags", "flag", exp.exportsFlags().stream()
+                                                    .map(AccessFlag::name)),
+                                            list("to", "module", exp.exportsTo().stream()
+                                                    .map(me -> me.name().stringValue()))))),
+                                  new ListNodeImpl(BLOCK, "opens", ma.opens().stream().map(opn ->
+                                    new MapNodeImpl(FLOW, "opn").with(
+                                            leaf("package", opn.openedPackage().asSymbol().name()),
+                                            list("flags", "flag", opn.opensFlags().stream()
+                                                    .map(AccessFlag::name)),
+                                            list("to", "module", opn.opensTo().stream()
+                                                    .map(me -> me.name().stringValue()))))),
+                                  new ListNodeImpl(BLOCK, "provides", ma.provides().stream()
+                                          .map(prov -> new MapNodeImpl(FLOW, "prov").with(
+                                                  leaf("class", prov.provides().name().stringValue()),
+                                                  list("with", "cls", prov.providesWith().stream()
+                                                          .map(ce -> ce.name().stringValue())))))));
+                case ModulePackagesAttribute mopa ->
+                    nodes.add(list("module packages", "subclass", mopa.packages().stream()
+                            .map(mp -> mp.asSymbol().name())));
+                case ModuleMainClassAttribute mmca ->
+                    nodes.add(leaf("module main class", mmca.mainClass().name().stringValue()));
+                case RecordAttribute ra ->
+                    nodes.add(new ListNodeImpl(BLOCK, "record components", ra.components().stream()
+                            .map(rc -> new MapNodeImpl(BLOCK, "component")
+                                    .with(leafs(
+                                        "name", rc.name().stringValue(),
+                                        "type", rc.descriptor().stringValue()))
+                                    .with(list("attributes", "attribute", rc.attributes().stream()
+                                            .map(Attribute::attributeName)))
+                                    .with(attributesToTree(rc.attributes(), verbosity)))));
+                case AnnotationDefaultAttribute ada ->
+                    nodes.add(new MapNodeImpl(FLOW, "annotation default").with(elementValueToTree(ada.defaultValue())));
+                case RuntimeInvisibleAnnotationsAttribute aa ->
+                    nodes.add(annotationsToTree("invisible annotations", aa.annotations()));
+                case RuntimeVisibleAnnotationsAttribute aa ->
+                    nodes.add(annotationsToTree("visible annotations", aa.annotations()));
+                case RuntimeInvisibleParameterAnnotationsAttribute aa ->
+                    nodes.add(parameterAnnotationsToTree("invisible parameter annotations", aa.parameterAnnotations()));
+                case RuntimeVisibleParameterAnnotationsAttribute aa ->
+                    nodes.add(parameterAnnotationsToTree("visible parameter annotations", aa.parameterAnnotations()));
+                case RuntimeInvisibleTypeAnnotationsAttribute aa ->
+                    nodes.add(typeAnnotationsToTree(BLOCK, "invisible type annotations", aa.annotations()));
+                case RuntimeVisibleTypeAnnotationsAttribute aa ->
+                    nodes.add(typeAnnotationsToTree(BLOCK, "visible type annotations", aa.annotations()));
+                case SignatureAttribute sa ->
+                    nodes.add(leaf("signature", sa.signature().stringValue()));
+                case SourceFileAttribute sfa ->
+                    nodes.add(leaf("source file", sfa.sourceFile().stringValue()));
+                default -> {}
+            }
+        }
+        return nodes.toArray(Node[]::new);
+    }
+
+    private static Node annotationsToTree(String name, List<Annotation> annos) {
+        return new ListNodeImpl(BLOCK, name, annos.stream().map(a ->
+                new MapNodeImpl(FLOW, "anno")
+                        .with(leaf("annotation class", a.className().stringValue()))
+                        .with(elementValuePairsToTree(a.elements()))));
+
+    }
+
+    private static Node typeAnnotationsToTree(Style style, String name, List<TypeAnnotation> annos) {
+        return new ListNodeImpl(style, name, annos.stream().map(a ->
+                new MapNodeImpl(FLOW, "anno")
+                        .with(leaf("annotation class", a.className().stringValue()),
+                              leaf("target info", a.targetInfo().targetType().name()))
+                        .with(elementValuePairsToTree(a.elements()))));
+
+    }
+
+    private static MapNodeImpl parameterAnnotationsToTree(String name, List<List<Annotation>> paramAnnotations) {
+        var node = new MapNodeImpl(BLOCK, name);
+        for (int i = 0; i < paramAnnotations.size(); i++) {
+            var annos = paramAnnotations.get(i);
+            if (!annos.isEmpty()) {
+                node.with(new ListNodeImpl(FLOW, "parameter " + (i + 1), annos.stream().map(a ->
+                                new MapNodeImpl(FLOW, "anno")
+                                        .with(leaf("annotation class", a.className().stringValue()))
+                                        .with(elementValuePairsToTree(a.elements())))));
+            }
+        }
+        return node;
+    }
+
+    private static Node[] localInfoToTree(List<LocalVariableInfo> locals, int slot, int bci) {
+        if (locals != null) {
+            for (var l : locals) {
+                if (l.slot() == slot && l.startPc() <= bci && l.length() + l.startPc() >= bci) {
+                    return leafs("type", l.type().stringValue(),
+                                 "variable name", l.name().stringValue());
+                }
+            }
+        }
+        return new Node[0];
+    }
+
+    private static void forEachOffset(TypeAnnotation ta, CodeAttribute lr, BiConsumer<Integer, TypeAnnotation> consumer) {
+        switch (ta.targetInfo()) {
+            case TypeAnnotation.OffsetTarget ot ->
+                consumer.accept(lr.labelToBci(ot.target()), ta);
+            case TypeAnnotation.TypeArgumentTarget tat ->
+                consumer.accept(lr.labelToBci(tat.target()), ta);
+            case TypeAnnotation.LocalVarTarget lvt ->
+                lvt.table().forEach(lvti -> consumer.accept(lr.labelToBci(lvti.startLabel()), ta));
+            default -> {}
+        }
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/classfile/impl/ClassReaderImpl.class b/tests/test_data/std/jdk/internal/classfile/impl/ClassReaderImpl.class
new file mode 100644
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HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/classfile/impl/ClassReaderImpl.java b/tests/test_data/std/jdk/internal/classfile/impl/ClassReaderImpl.java
new file mode 100644
index 00000000..b8a262ce
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/classfile/impl/ClassReaderImpl.java
@@ -0,0 +1,516 @@
+/*
+ * Copyright (c) 2022, 2024, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package jdk.internal.classfile.impl;
+
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.List;
+import java.util.Objects;
+import java.util.Optional;
+import java.util.function.Function;
+
+import java.lang.classfile.*;
+import java.lang.classfile.attribute.BootstrapMethodsAttribute;
+import java.lang.classfile.constantpool.*;
+
+import static java.lang.classfile.ClassFile.TAG_CLASS;
+import static java.lang.classfile.ClassFile.TAG_CONSTANTDYNAMIC;
+import static java.lang.classfile.ClassFile.TAG_DOUBLE;
+import static java.lang.classfile.ClassFile.TAG_FIELDREF;
+import static java.lang.classfile.ClassFile.TAG_FLOAT;
+import static java.lang.classfile.ClassFile.TAG_INTEGER;
+import static java.lang.classfile.ClassFile.TAG_INTERFACEMETHODREF;
+import static java.lang.classfile.ClassFile.TAG_INVOKEDYNAMIC;
+import static java.lang.classfile.ClassFile.TAG_LONG;
+import static java.lang.classfile.ClassFile.TAG_METHODHANDLE;
+import static java.lang.classfile.ClassFile.TAG_METHODREF;
+import static java.lang.classfile.ClassFile.TAG_METHODTYPE;
+import static java.lang.classfile.ClassFile.TAG_MODULE;
+import static java.lang.classfile.ClassFile.TAG_NAMEANDTYPE;
+import static java.lang.classfile.ClassFile.TAG_PACKAGE;
+import static java.lang.classfile.ClassFile.TAG_STRING;
+import static java.lang.classfile.ClassFile.TAG_UTF8;
+
+public final class ClassReaderImpl
+        implements ClassReader {
+    static final int CP_ITEM_START = 10;
+
+    private final byte[] buffer;
+    private final int metadataStart;
+    private final int classfileLength;
+    private final Function<Utf8Entry, AttributeMapper<?>> attributeMapper;
+    private final int flags;
+    private final int thisClassPos;
+    private ClassEntry thisClass;
+    private Optional<ClassEntry> superclass;
+    private final int constantPoolCount;
+    private final int[] cpOffset;
+
+    final ClassFileImpl context;
+    final int interfacesPos;
+    final PoolEntry[] cp;
+
+    private ClassModel containedClass;
+    private List<BootstrapMethodEntryImpl> bsmEntries;
+    private BootstrapMethodsAttribute bootstrapMethodsAttribute;
+
+    ClassReaderImpl(byte[] classfileBytes,
+                    ClassFileImpl context) {
+        this.buffer = classfileBytes;
+        this.classfileLength = classfileBytes.length;
+        this.context = context;
+        this.attributeMapper = this.context.attributeMapperOption().attributeMapper();
+        if (classfileLength < 4 || readInt(0) != 0xCAFEBABE) {
+            throw new IllegalArgumentException("Bad magic number");
+        }
+        if (readU2(6) > ClassFile.latestMajorVersion()) {
+            throw new IllegalArgumentException("Unsupported class file version: " + readU2(6));
+        }
+        int constantPoolCount = readU2(8);
+        int[] cpOffset = new int[constantPoolCount];
+        int p = CP_ITEM_START;
+        for (int i = 1; i < cpOffset.length; ++i) {
+            cpOffset[i] = p;
+            int tag = readU1(p);
+            ++p;
+            switch (tag) {
+                // 2
+                case TAG_CLASS, TAG_METHODTYPE, TAG_MODULE, TAG_STRING, TAG_PACKAGE -> p += 2;
+
+                // 3
+                case TAG_METHODHANDLE -> p += 3;
+
+                // 4
+                case TAG_CONSTANTDYNAMIC, TAG_FIELDREF, TAG_FLOAT, TAG_INTEGER,
+                     TAG_INTERFACEMETHODREF, TAG_INVOKEDYNAMIC, TAG_METHODREF,
+                     TAG_NAMEANDTYPE -> p += 4;
+
+                // 8
+                case TAG_DOUBLE, TAG_LONG -> {
+                    p += 8;
+                    ++i;
+                }
+                case TAG_UTF8 -> p += 2 + readU2(p);
+                default -> throw new ConstantPoolException(
+                        "Bad tag (" + tag + ") at index (" + i + ") position (" + p + ")");
+            }
+        }
+        this.metadataStart = p;
+        this.cpOffset = cpOffset;
+        this.constantPoolCount = constantPoolCount;
+        this.cp = new PoolEntry[constantPoolCount];
+
+        this.flags = readU2(p);
+        this.thisClassPos = p + 2;
+        p += 6;
+        this.interfacesPos = p;
+    }
+
+    public ClassFileImpl context() {
+        return context;
+    }
+
+    @Override
+    public Function<Utf8Entry, AttributeMapper<?>> customAttributes() {
+        return attributeMapper;
+    }
+
+    @Override
+    public int size() {
+        return constantPoolCount;
+    }
+
+    @Override
+    public int flags() {
+        return flags;
+    }
+
+    @Override
+    public ClassEntry thisClassEntry() {
+        if (thisClass == null) {
+            thisClass = readClassEntry(thisClassPos);
+        }
+        return thisClass;
+    }
+
+    @Override
+    public Optional<ClassEntry> superclassEntry() {
+        if (superclass == null) {
+            superclass = Optional.ofNullable(readEntryOrNull(thisClassPos + 2, ClassEntry.class));
+        }
+        return superclass;
+    }
+
+    public int thisClassPos() {
+        return thisClassPos;
+    }
+
+    @Override
+    public int classfileLength() {
+        return classfileLength;
+    }
+
+    //------ Bootstrap Method Table handling
+
+    @Override
+    public int bootstrapMethodCount() {
+        return bootstrapMethodsAttribute().bootstrapMethodsSize();
+    }
+
+    @Override
+    public BootstrapMethodEntryImpl bootstrapMethodEntry(int index) {
+        if (index < 0 || index >= bootstrapMethodCount()) {
+            throw new ConstantPoolException("Bad BSM index: " + index);
+        }
+        return bsmEntries().get(index);
+    }
+
+    private static IllegalArgumentException outOfBoundsError(IndexOutOfBoundsException cause) {
+        return new IllegalArgumentException("Reading beyond classfile bounds", cause);
+    }
+
+    @Override
+    public int readU1(int p) {
+        try {
+            return buffer[p] & 0xFF;
+        } catch (IndexOutOfBoundsException e) {
+            throw outOfBoundsError(e);
+        }
+    }
+
+    @Override
+    public int readU2(int p) {
+        try {
+            int b1 = buffer[p] & 0xFF;
+            int b2 = buffer[p + 1] & 0xFF;
+            return (b1 << 8) + b2;
+        } catch (IndexOutOfBoundsException e) {
+            throw outOfBoundsError(e);
+        }
+    }
+
+    @Override
+    public int readS1(int p) {
+        try {
+            return buffer[p];
+        } catch (IndexOutOfBoundsException e) {
+            throw outOfBoundsError(e);
+        }
+    }
+
+    @Override
+    public int readS2(int p) {
+        try {
+            int b1 = buffer[p];
+            int b2 = buffer[p + 1] & 0xFF;
+            return (b1 << 8) + b2;
+        } catch (IndexOutOfBoundsException e) {
+            throw outOfBoundsError(e);
+        }
+    }
+
+    @Override
+    public int readInt(int p) {
+        try {
+            int ch1 = buffer[p] & 0xFF;
+            int ch2 = buffer[p + 1] & 0xFF;
+            int ch3 = buffer[p + 2] & 0xFF;
+            int ch4 = buffer[p + 3] & 0xFF;
+            return (ch1 << 24) + (ch2 << 16) + (ch3 << 8) + ch4;
+        } catch (IndexOutOfBoundsException e) {
+            throw outOfBoundsError(e);
+        }
+    }
+
+    @Override
+    public long readLong(int p) {
+        try {
+            return ((long) buffer[p + 0] << 56) + ((long) (buffer[p + 1] & 255) << 48) +
+                   ((long) (buffer[p + 2] & 255) << 40) + ((long) (buffer[p + 3] & 255) << 32) +
+                   ((long) (buffer[p + 4] & 255) << 24) + ((buffer[p + 5] & 255) << 16) + ((buffer[p + 6] & 255) << 8) +
+                   (buffer[p + 7] & 255);
+        } catch (IndexOutOfBoundsException e) {
+            throw outOfBoundsError(e);
+        }
+    }
+
+    @Override
+    public float readFloat(int p) {
+        return Float.intBitsToFloat(readInt(p));
+    }
+
+    @Override
+    public double readDouble(int p) {
+        return Double.longBitsToDouble(readLong(p));
+    }
+
+    @Override
+    public byte[] readBytes(int p, int len) {
+        try {
+            return Arrays.copyOfRange(buffer, p, p + len);
+        } catch (IndexOutOfBoundsException e) {
+            throw outOfBoundsError(e);
+        }
+    }
+
+    @Override
+    public void copyBytesTo(BufWriter buf, int p, int len) {
+        try {
+            buf.writeBytes(buffer, p, len);
+        } catch (IndexOutOfBoundsException e) {
+            throw outOfBoundsError(e);
+        }
+    }
+
+    BootstrapMethodsAttribute bootstrapMethodsAttribute() {
+
+        if (bootstrapMethodsAttribute == null) {
+            bootstrapMethodsAttribute
+                    = containedClass.findAttribute(Attributes.bootstrapMethods())
+                                    .orElse(new UnboundAttribute.EmptyBootstrapAttribute());
+        }
+
+        return bootstrapMethodsAttribute;
+    }
+
+    List<BootstrapMethodEntryImpl> bsmEntries() {
+        if (bsmEntries == null) {
+            bsmEntries = new ArrayList<>();
+            BootstrapMethodsAttribute attr = bootstrapMethodsAttribute();
+            List<BootstrapMethodEntry> list = attr.bootstrapMethods();
+            if (!list.isEmpty()) {
+                for (BootstrapMethodEntry bm : list) {
+                    AbstractPoolEntry.MethodHandleEntryImpl handle = (AbstractPoolEntry.MethodHandleEntryImpl) bm.bootstrapMethod();
+                    List<LoadableConstantEntry> args = bm.arguments();
+                    int hash = BootstrapMethodEntryImpl.computeHashCode(handle, args);
+                    bsmEntries.add(new BootstrapMethodEntryImpl(this, bsmEntries.size(), hash, handle, args));
+                }
+            }
+        }
+        return bsmEntries;
+    }
+
+    void setContainedClass(ClassModel containedClass) {
+        this.containedClass = containedClass;
+    }
+
+    ClassModel getContainedClass() {
+        return containedClass;
+    }
+
+    boolean writeBootstrapMethods(BufWriter buf) {
+        Optional<BootstrapMethodsAttribute> a
+                = containedClass.findAttribute(Attributes.bootstrapMethods());
+        if (a.isEmpty())
+            return false;
+        a.get().writeTo(buf);
+        return true;
+    }
+
+    void writeConstantPoolEntries(BufWriter buf) {
+        copyBytesTo(buf, ClassReaderImpl.CP_ITEM_START,
+                    metadataStart - ClassReaderImpl.CP_ITEM_START);
+    }
+
+    // Constantpool
+    @Override
+    public PoolEntry entryByIndex(int index) {
+        return entryByIndex(index, PoolEntry.class);
+    }
+
+    private static boolean checkTag(int tag, Class<?> cls) {
+        var type = switch (tag) {
+            // JVMS Table 4.4-B. Constant pool tags
+            case TAG_UTF8 -> AbstractPoolEntry.Utf8EntryImpl.class;
+            case TAG_INTEGER -> AbstractPoolEntry.IntegerEntryImpl.class;
+            case TAG_FLOAT -> AbstractPoolEntry.FloatEntryImpl.class;
+            case TAG_LONG -> AbstractPoolEntry.LongEntryImpl.class;
+            case TAG_DOUBLE -> AbstractPoolEntry.DoubleEntryImpl.class;
+            case TAG_CLASS -> AbstractPoolEntry.ClassEntryImpl.class;
+            case TAG_STRING -> AbstractPoolEntry.StringEntryImpl.class;
+            case TAG_FIELDREF -> AbstractPoolEntry.FieldRefEntryImpl.class;
+            case TAG_METHODREF -> AbstractPoolEntry.MethodRefEntryImpl.class;
+            case TAG_INTERFACEMETHODREF -> AbstractPoolEntry.InterfaceMethodRefEntryImpl.class;
+            case TAG_NAMEANDTYPE -> AbstractPoolEntry.NameAndTypeEntryImpl.class;
+            case TAG_METHODHANDLE -> AbstractPoolEntry.MethodHandleEntryImpl.class;
+            case TAG_METHODTYPE -> AbstractPoolEntry.MethodTypeEntryImpl.class;
+            case TAG_CONSTANTDYNAMIC -> AbstractPoolEntry.ConstantDynamicEntryImpl.class;
+            case TAG_INVOKEDYNAMIC -> AbstractPoolEntry.InvokeDynamicEntryImpl.class;
+            case TAG_MODULE -> AbstractPoolEntry.ModuleEntryImpl.class;
+            case TAG_PACKAGE -> AbstractPoolEntry.PackageEntryImpl.class;
+            default -> null;
+        };
+        return type != null && cls.isAssignableFrom(type);
+    }
+
+    static <T extends PoolEntry> T checkType(PoolEntry e, int index, Class<T> cls) {
+        if (cls.isInstance(e)) return cls.cast(e);
+        throw new ConstantPoolException("Not a " + cls.getSimpleName() + " at index: " + index);
+    }
+
+    @Override
+    public <T extends PoolEntry> T entryByIndex(int index, Class<T> cls) {
+        Objects.requireNonNull(cls);
+        if (index <= 0 || index >= constantPoolCount) {
+            throw new ConstantPoolException("Bad CP index: " + index);
+        }
+        PoolEntry info = cp[index];
+        if (info == null) {
+            int offset = cpOffset[index];
+            if (offset == 0) {
+                throw new ConstantPoolException("Unusable CP index: " + index);
+            }
+            int tag = readU1(offset);
+            if (!checkTag(tag, cls)) {
+                throw new ConstantPoolException(
+                        "Bad tag (" + tag + ") at index (" + index + ") position (" + offset + "), expected " + cls.getSimpleName());
+            }
+            final int q = offset + 1;
+            info = switch (tag) {
+                case TAG_UTF8 -> new AbstractPoolEntry.Utf8EntryImpl(this, index, buffer, q + 2, readU2(q));
+                case TAG_INTEGER -> new AbstractPoolEntry.IntegerEntryImpl(this, index, readInt(q));
+                case TAG_FLOAT -> new AbstractPoolEntry.FloatEntryImpl(this, index, readFloat(q));
+                case TAG_LONG -> new AbstractPoolEntry.LongEntryImpl(this, index, readLong(q));
+                case TAG_DOUBLE -> new AbstractPoolEntry.DoubleEntryImpl(this, index, readDouble(q));
+                case TAG_CLASS -> new AbstractPoolEntry.ClassEntryImpl(this, index, (AbstractPoolEntry.Utf8EntryImpl) readUtf8Entry(q));
+                case TAG_STRING -> new AbstractPoolEntry.StringEntryImpl(this, index, (AbstractPoolEntry.Utf8EntryImpl) readUtf8Entry(q));
+                case TAG_FIELDREF -> new AbstractPoolEntry.FieldRefEntryImpl(this, index, (AbstractPoolEntry.ClassEntryImpl) readClassEntry(q),
+                                                                             (AbstractPoolEntry.NameAndTypeEntryImpl) readNameAndTypeEntry(q + 2));
+                case TAG_METHODREF -> new AbstractPoolEntry.MethodRefEntryImpl(this, index, (AbstractPoolEntry.ClassEntryImpl) readClassEntry(q),
+                                                                               (AbstractPoolEntry.NameAndTypeEntryImpl) readNameAndTypeEntry(q + 2));
+                case TAG_INTERFACEMETHODREF -> new AbstractPoolEntry.InterfaceMethodRefEntryImpl(this, index, (AbstractPoolEntry.ClassEntryImpl) readClassEntry(q),
+                                                                                                 (AbstractPoolEntry.NameAndTypeEntryImpl) readNameAndTypeEntry(q + 2));
+                case TAG_NAMEANDTYPE -> new AbstractPoolEntry.NameAndTypeEntryImpl(this, index, (AbstractPoolEntry.Utf8EntryImpl) readUtf8Entry(q),
+                                                                                   (AbstractPoolEntry.Utf8EntryImpl) readUtf8Entry(q + 2));
+                case TAG_METHODHANDLE -> new AbstractPoolEntry.MethodHandleEntryImpl(this, index, readU1(q),
+                                                                                     readEntry(q + 1, AbstractPoolEntry.AbstractMemberRefEntry.class));
+                case TAG_METHODTYPE -> new AbstractPoolEntry.MethodTypeEntryImpl(this, index, (AbstractPoolEntry.Utf8EntryImpl) readUtf8Entry(q));
+                case TAG_CONSTANTDYNAMIC -> new AbstractPoolEntry.ConstantDynamicEntryImpl(this, index, readU2(q), (AbstractPoolEntry.NameAndTypeEntryImpl) readNameAndTypeEntry(q + 2));
+                case TAG_INVOKEDYNAMIC -> new AbstractPoolEntry.InvokeDynamicEntryImpl(this, index, readU2(q), (AbstractPoolEntry.NameAndTypeEntryImpl) readNameAndTypeEntry(q + 2));
+                case TAG_MODULE -> new AbstractPoolEntry.ModuleEntryImpl(this, index, (AbstractPoolEntry.Utf8EntryImpl) readUtf8Entry(q));
+                case TAG_PACKAGE -> new AbstractPoolEntry.PackageEntryImpl(this, index, (AbstractPoolEntry.Utf8EntryImpl) readUtf8Entry(q));
+                default -> throw new ConstantPoolException(
+                        "Bad tag (" + tag + ") at index (" + index + ") position (" + offset + ")");
+            };
+            cp[index] = info;
+        }
+        return checkType(info, index, cls);
+    }
+
+    public int skipAttributeHolder(int offset) {
+        int p = offset;
+        int cnt = readU2(p);
+        p += 2;
+        for (int i = 0; i < cnt; ++i) {
+            int len = readInt(p + 2);
+            p += 6;
+            if (len < 0 || len > classfileLength - p) {
+                throw new IllegalArgumentException("attribute " + readUtf8Entry(p - 6).stringValue() + " too big to handle");
+            }
+            p += len;
+        }
+        return p;
+    }
+
+    @Override
+    public PoolEntry readEntry(int pos) {
+        return entryByIndex(readU2(pos));
+    }
+
+    @Override
+    public <T extends PoolEntry> T readEntry(int pos, Class<T> cls) {
+        Objects.requireNonNull(cls);
+        return entryByIndex(readU2(pos), cls);
+    }
+
+    @Override
+    public PoolEntry readEntryOrNull(int pos) {
+        int index = readU2(pos);
+        if (index == 0) {
+            return null;
+        }
+        return entryByIndex(index);
+    }
+
+    @Override
+    public <T extends PoolEntry> T readEntryOrNull(int offset, Class<T> cls) {
+        Objects.requireNonNull(cls);
+        int index = readU2(offset);
+        if (index == 0) {
+            return null;
+        }
+        return entryByIndex(index, cls);
+    }
+
+    @Override
+    public Utf8Entry readUtf8Entry(int pos) {
+        return readEntry(pos, Utf8Entry.class);
+    }
+
+    @Override
+    public Utf8Entry readUtf8EntryOrNull(int pos) {
+        return readEntryOrNull(pos, Utf8Entry.class);
+    }
+
+    @Override
+    public ModuleEntry readModuleEntry(int pos) {
+        return readEntry(pos, ModuleEntry.class);
+    }
+
+    @Override
+    public PackageEntry readPackageEntry(int pos) {
+        return readEntry(pos, PackageEntry.class);
+    }
+
+    @Override
+    public ClassEntry readClassEntry(int pos) {
+        return readEntry(pos, ClassEntry.class);
+    }
+
+    @Override
+    public NameAndTypeEntry readNameAndTypeEntry(int pos) {
+        return readEntry(pos, NameAndTypeEntry.class);
+    }
+
+    @Override
+    public MethodHandleEntry readMethodHandleEntry(int pos) {
+        return readEntry(pos, MethodHandleEntry.class);
+    }
+
+    @Override
+    public boolean compare(BufWriter bufWriter,
+                           int bufWriterOffset,
+                           int classReaderOffset,
+                           int length) {
+        try {
+            return Arrays.equals(((BufWriterImpl) bufWriter).elems,
+                                 bufWriterOffset, bufWriterOffset + length,
+                                 buffer, classReaderOffset, classReaderOffset + length);
+        } catch (IndexOutOfBoundsException e) {
+            throw outOfBoundsError(e);
+        }
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/classfile/impl/ClassRemapperImpl$1.class b/tests/test_data/std/jdk/internal/classfile/impl/ClassRemapperImpl$1.class
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index 0000000000000000000000000000000000000000..728fbf3ad8cd697e42b8d33f205f61310151c057
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diff --git a/tests/test_data/std/jdk/internal/classfile/impl/ClassRemapperImpl.class b/tests/test_data/std/jdk/internal/classfile/impl/ClassRemapperImpl.class
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diff --git a/tests/test_data/std/jdk/internal/classfile/impl/ClassRemapperImpl.java b/tests/test_data/std/jdk/internal/classfile/impl/ClassRemapperImpl.java
new file mode 100644
index 00000000..d1a02d9a
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/classfile/impl/ClassRemapperImpl.java
@@ -0,0 +1,418 @@
+/*
+ * Copyright (c) 2023, 2024, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package jdk.internal.classfile.impl;
+
+import java.lang.classfile.Annotation;
+import java.lang.classfile.AnnotationElement;
+import java.lang.classfile.AnnotationValue;
+import java.lang.classfile.ClassBuilder;
+import java.lang.classfile.ClassElement;
+import java.lang.classfile.ClassSignature;
+import java.lang.classfile.CodeBuilder;
+import java.lang.classfile.CodeElement;
+import java.lang.classfile.CodeModel;
+import java.lang.classfile.CodeTransform;
+import java.lang.classfile.FieldBuilder;
+import java.lang.classfile.FieldElement;
+import java.lang.classfile.FieldModel;
+import java.lang.classfile.FieldTransform;
+import java.lang.classfile.Interfaces;
+import java.lang.classfile.MethodBuilder;
+import java.lang.classfile.MethodElement;
+import java.lang.classfile.MethodModel;
+import java.lang.classfile.MethodSignature;
+import java.lang.classfile.MethodTransform;
+import java.lang.classfile.Signature;
+import java.lang.classfile.Superclass;
+import java.lang.classfile.TypeAnnotation;
+import java.lang.classfile.attribute.AnnotationDefaultAttribute;
+import java.lang.classfile.attribute.EnclosingMethodAttribute;
+import java.lang.classfile.attribute.ExceptionsAttribute;
+import java.lang.classfile.attribute.InnerClassInfo;
+import java.lang.classfile.attribute.InnerClassesAttribute;
+import java.lang.classfile.attribute.ModuleAttribute;
+import java.lang.classfile.attribute.ModuleProvideInfo;
+import java.lang.classfile.attribute.NestHostAttribute;
+import java.lang.classfile.attribute.NestMembersAttribute;
+import java.lang.classfile.attribute.PermittedSubclassesAttribute;
+import java.lang.classfile.attribute.RecordAttribute;
+import java.lang.classfile.attribute.RecordComponentInfo;
+import java.lang.classfile.attribute.RuntimeInvisibleAnnotationsAttribute;
+import java.lang.classfile.attribute.RuntimeInvisibleParameterAnnotationsAttribute;
+import java.lang.classfile.attribute.RuntimeInvisibleTypeAnnotationsAttribute;
+import java.lang.classfile.attribute.RuntimeVisibleAnnotationsAttribute;
+import java.lang.classfile.attribute.RuntimeVisibleParameterAnnotationsAttribute;
+import java.lang.classfile.attribute.RuntimeVisibleTypeAnnotationsAttribute;
+import java.lang.classfile.attribute.SignatureAttribute;
+import java.lang.classfile.components.ClassRemapper;
+import java.lang.classfile.constantpool.Utf8Entry;
+import java.lang.classfile.instruction.ConstantInstruction.LoadConstantInstruction;
+import java.lang.classfile.instruction.ExceptionCatch;
+import java.lang.classfile.instruction.FieldInstruction;
+import java.lang.classfile.instruction.InvokeDynamicInstruction;
+import java.lang.classfile.instruction.InvokeInstruction;
+import java.lang.classfile.instruction.LocalVariable;
+import java.lang.classfile.instruction.LocalVariableType;
+import java.lang.classfile.instruction.NewMultiArrayInstruction;
+import java.lang.classfile.instruction.NewObjectInstruction;
+import java.lang.classfile.instruction.NewReferenceArrayInstruction;
+import java.lang.classfile.instruction.TypeCheckInstruction;
+
+import java.lang.constant.ClassDesc;
+import java.lang.constant.ConstantDesc;
+import java.lang.constant.DirectMethodHandleDesc;
+import java.lang.constant.DynamicCallSiteDesc;
+import java.lang.constant.DynamicConstantDesc;
+import java.lang.constant.MethodHandleDesc;
+import java.lang.constant.MethodTypeDesc;
+import java.util.List;
+import java.util.function.Function;
+
+public record ClassRemapperImpl(Function<ClassDesc, ClassDesc> mapFunction) implements ClassRemapper {
+
+    @Override
+    public void accept(ClassBuilder clb, ClassElement cle) {
+        switch (cle) {
+            case FieldModel fm ->
+                clb.withField(fm.fieldName().stringValue(), map(
+                        fm.fieldTypeSymbol()), fb ->
+                                fm.forEachElement(asFieldTransform().resolve(fb).consumer()));
+            case MethodModel mm ->
+                clb.withMethod(mm.methodName().stringValue(), mapMethodDesc(
+                        mm.methodTypeSymbol()), mm.flags().flagsMask(), mb ->
+                                mm.forEachElement(asMethodTransform().resolve(mb).consumer()));
+            case Superclass sc ->
+                clb.withSuperclass(map(sc.superclassEntry().asSymbol()));
+            case Interfaces ins ->
+                clb.withInterfaceSymbols(Util.mappedList(ins.interfaces(), in ->
+                        map(in.asSymbol())));
+            case SignatureAttribute sa ->
+                clb.with(SignatureAttribute.of(mapClassSignature(sa.asClassSignature())));
+            case InnerClassesAttribute ica ->
+                clb.with(InnerClassesAttribute.of(ica.classes().stream().map(ici ->
+                        InnerClassInfo.of(map(ici.innerClass().asSymbol()),
+                                ici.outerClass().map(oc -> map(oc.asSymbol())),
+                                ici.innerName().map(Utf8Entry::stringValue),
+                                ici.flagsMask())).toList()));
+            case EnclosingMethodAttribute ema ->
+                clb.with(EnclosingMethodAttribute.of(map(ema.enclosingClass().asSymbol()),
+                        ema.enclosingMethodName().map(Utf8Entry::stringValue),
+                        ema.enclosingMethodTypeSymbol().map(this::mapMethodDesc)));
+            case RecordAttribute ra ->
+                clb.with(RecordAttribute.of(ra.components().stream()
+                        .map(this::mapRecordComponent).toList()));
+            case ModuleAttribute ma ->
+                clb.with(ModuleAttribute.of(ma.moduleName(), ma.moduleFlagsMask(),
+                        ma.moduleVersion().orElse(null),
+                        ma.requires(), ma.exports(), ma.opens(),
+                        ma.uses().stream().map(ce ->
+                                clb.constantPool().classEntry(map(ce.asSymbol()))).toList(),
+                        ma.provides().stream().map(mp ->
+                                ModuleProvideInfo.of(map(mp.provides().asSymbol()),
+                                        mp.providesWith().stream().map(pw ->
+                                                map(pw.asSymbol())).toList())).toList()));
+            case NestHostAttribute nha ->
+                clb.with(NestHostAttribute.of(map(nha.nestHost().asSymbol())));
+            case NestMembersAttribute nma ->
+                clb.with(NestMembersAttribute.ofSymbols(nma.nestMembers().stream()
+                        .map(nm -> map(nm.asSymbol())).toList()));
+            case PermittedSubclassesAttribute psa ->
+                clb.with(PermittedSubclassesAttribute.ofSymbols(
+                        psa.permittedSubclasses().stream().map(ps ->
+                                map(ps.asSymbol())).toList()));
+            case RuntimeVisibleAnnotationsAttribute aa ->
+                clb.with(RuntimeVisibleAnnotationsAttribute.of(
+                        mapAnnotations(aa.annotations())));
+            case RuntimeInvisibleAnnotationsAttribute aa ->
+                clb.with(RuntimeInvisibleAnnotationsAttribute.of(
+                        mapAnnotations(aa.annotations())));
+            case RuntimeVisibleTypeAnnotationsAttribute aa ->
+                clb.with(RuntimeVisibleTypeAnnotationsAttribute.of(
+                        mapTypeAnnotations(aa.annotations())));
+            case RuntimeInvisibleTypeAnnotationsAttribute aa ->
+                clb.with(RuntimeInvisibleTypeAnnotationsAttribute.of(
+                        mapTypeAnnotations(aa.annotations())));
+            default ->
+                clb.with(cle);
+        }
+    }
+
+    @Override
+    public FieldTransform asFieldTransform() {
+        return (FieldBuilder fb, FieldElement fe) -> {
+            switch (fe) {
+                case SignatureAttribute sa ->
+                    fb.with(SignatureAttribute.of(
+                            mapSignature(sa.asTypeSignature())));
+                case RuntimeVisibleAnnotationsAttribute aa ->
+                    fb.with(RuntimeVisibleAnnotationsAttribute.of(
+                            mapAnnotations(aa.annotations())));
+                case RuntimeInvisibleAnnotationsAttribute aa ->
+                    fb.with(RuntimeInvisibleAnnotationsAttribute.of(
+                            mapAnnotations(aa.annotations())));
+                case RuntimeVisibleTypeAnnotationsAttribute aa ->
+                    fb.with(RuntimeVisibleTypeAnnotationsAttribute.of(
+                            mapTypeAnnotations(aa.annotations())));
+                case RuntimeInvisibleTypeAnnotationsAttribute aa ->
+                    fb.with(RuntimeInvisibleTypeAnnotationsAttribute.of(
+                            mapTypeAnnotations(aa.annotations())));
+                default ->
+                    fb.with(fe);
+            }
+        };
+    }
+
+    @Override
+    public MethodTransform asMethodTransform() {
+        return (MethodBuilder mb, MethodElement me) -> {
+            switch (me) {
+                case AnnotationDefaultAttribute ada ->
+                    mb.with(AnnotationDefaultAttribute.of(
+                            mapAnnotationValue(ada.defaultValue())));
+                case CodeModel com ->
+                    mb.transformCode(com, asCodeTransform());
+                case ExceptionsAttribute ea ->
+                    mb.with(ExceptionsAttribute.ofSymbols(
+                            ea.exceptions().stream().map(ce ->
+                                    map(ce.asSymbol())).toList()));
+                case SignatureAttribute sa ->
+                    mb.with(SignatureAttribute.of(
+                            mapMethodSignature(sa.asMethodSignature())));
+                case RuntimeVisibleAnnotationsAttribute aa ->
+                    mb.with(RuntimeVisibleAnnotationsAttribute.of(
+                            mapAnnotations(aa.annotations())));
+                case RuntimeInvisibleAnnotationsAttribute aa ->
+                    mb.with(RuntimeInvisibleAnnotationsAttribute.of(
+                            mapAnnotations(aa.annotations())));
+                case RuntimeVisibleParameterAnnotationsAttribute paa ->
+                    mb.with(RuntimeVisibleParameterAnnotationsAttribute.of(
+                            paa.parameterAnnotations().stream()
+                                    .map(this::mapAnnotations).toList()));
+                case RuntimeInvisibleParameterAnnotationsAttribute paa ->
+                    mb.with(RuntimeInvisibleParameterAnnotationsAttribute.of(
+                            paa.parameterAnnotations().stream()
+                                    .map(this::mapAnnotations).toList()));
+                case RuntimeVisibleTypeAnnotationsAttribute aa ->
+                    mb.with(RuntimeVisibleTypeAnnotationsAttribute.of(
+                            mapTypeAnnotations(aa.annotations())));
+                case RuntimeInvisibleTypeAnnotationsAttribute aa ->
+                    mb.with(RuntimeInvisibleTypeAnnotationsAttribute.of(
+                            mapTypeAnnotations(aa.annotations())));
+                default ->
+                    mb.with(me);
+            }
+        };
+    }
+
+    @Override
+    public CodeTransform asCodeTransform() {
+        return (CodeBuilder cob, CodeElement coe) -> {
+            switch (coe) {
+                case FieldInstruction fai ->
+                    cob.fieldAccess(fai.opcode(), map(fai.owner().asSymbol()),
+                            fai.name().stringValue(), map(fai.typeSymbol()));
+                case InvokeInstruction ii ->
+                    cob.invoke(ii.opcode(), map(ii.owner().asSymbol()),
+                            ii.name().stringValue(), mapMethodDesc(ii.typeSymbol()),
+                            ii.isInterface());
+                case InvokeDynamicInstruction idi ->
+                    cob.invokedynamic(DynamicCallSiteDesc.of(
+                            mapDirectMethodHandle(idi.bootstrapMethod()), idi.name().stringValue(),
+                            mapMethodDesc(idi.typeSymbol()),
+                            idi.bootstrapArgs().stream().map(this::mapConstantValue).toArray(ConstantDesc[]::new)));
+                case NewObjectInstruction c ->
+                    cob.new_(map(c.className().asSymbol()));
+                case NewReferenceArrayInstruction c ->
+                    cob.anewarray(map(c.componentType().asSymbol()));
+                case NewMultiArrayInstruction c ->
+                    cob.multianewarray(map(c.arrayType().asSymbol()), c.dimensions());
+                case TypeCheckInstruction c ->
+                    cob.with(TypeCheckInstruction.of(c.opcode(), map(c.type().asSymbol())));
+                case ExceptionCatch c ->
+                    cob.exceptionCatch(c.tryStart(), c.tryEnd(), c.handler(),c.catchType()
+                            .map(d -> TemporaryConstantPool.INSTANCE.classEntry(map(d.asSymbol()))));
+                case LocalVariable c ->
+                    cob.localVariable(c.slot(), c.name().stringValue(), map(c.typeSymbol()),
+                            c.startScope(), c.endScope());
+                case LocalVariableType c ->
+                    cob.localVariableType(c.slot(), c.name().stringValue(),
+                            mapSignature(c.signatureSymbol()), c.startScope(), c.endScope());
+                case LoadConstantInstruction ldc ->
+                    cob.loadConstant(ldc.opcode(),
+                            mapConstantValue(ldc.constantValue()));
+                case RuntimeVisibleTypeAnnotationsAttribute aa ->
+                    cob.with(RuntimeVisibleTypeAnnotationsAttribute.of(
+                            mapTypeAnnotations(aa.annotations())));
+                case RuntimeInvisibleTypeAnnotationsAttribute aa ->
+                    cob.with(RuntimeInvisibleTypeAnnotationsAttribute.of(
+                            mapTypeAnnotations(aa.annotations())));
+                default ->
+                    cob.with(coe);
+            }
+        };
+    }
+
+    @Override
+    public ClassDesc map(ClassDesc desc) {
+        if (desc == null) return null;
+        if (desc.isArray()) return map(desc.componentType()).arrayType();
+        if (desc.isPrimitive()) return desc;
+        return mapFunction.apply(desc);
+    }
+
+    MethodTypeDesc mapMethodDesc(MethodTypeDesc desc) {
+        return MethodTypeDesc.of(map(desc.returnType()),
+                desc.parameterList().stream().map(this::map).toArray(ClassDesc[]::new));
+    }
+
+    ClassSignature mapClassSignature(ClassSignature signature) {
+        return ClassSignature.of(mapTypeParams(signature.typeParameters()),
+                mapSignature(signature.superclassSignature()),
+                signature.superinterfaceSignatures().stream()
+                        .map(this::mapSignature).toArray(Signature.ClassTypeSig[]::new));
+    }
+
+    MethodSignature mapMethodSignature(MethodSignature signature) {
+        return MethodSignature.of(mapTypeParams(signature.typeParameters()),
+                signature.throwableSignatures().stream().map(this::mapSignature).toList(),
+                mapSignature(signature.result()),
+                signature.arguments().stream()
+                        .map(this::mapSignature).toArray(Signature[]::new));
+    }
+
+    RecordComponentInfo mapRecordComponent(RecordComponentInfo component) {
+        return RecordComponentInfo.of(component.name().stringValue(),
+                map(component.descriptorSymbol()),
+                component.attributes().stream().map(atr ->
+                    switch (atr) {
+                        case SignatureAttribute sa ->
+                            SignatureAttribute.of(
+                                    mapSignature(sa.asTypeSignature()));
+                        case RuntimeVisibleAnnotationsAttribute aa ->
+                            RuntimeVisibleAnnotationsAttribute.of(
+                                    mapAnnotations(aa.annotations()));
+                        case RuntimeInvisibleAnnotationsAttribute aa ->
+                            RuntimeInvisibleAnnotationsAttribute.of(
+                                    mapAnnotations(aa.annotations()));
+                        case RuntimeVisibleTypeAnnotationsAttribute aa ->
+                            RuntimeVisibleTypeAnnotationsAttribute.of(
+                                    mapTypeAnnotations(aa.annotations()));
+                        case RuntimeInvisibleTypeAnnotationsAttribute aa ->
+                            RuntimeInvisibleTypeAnnotationsAttribute.of(
+                                    mapTypeAnnotations(aa.annotations()));
+                        default -> atr;
+                    }).toList());
+    }
+
+    DirectMethodHandleDesc mapDirectMethodHandle(DirectMethodHandleDesc dmhd) {
+        return switch (dmhd.kind()) {
+            case GETTER, SETTER, STATIC_GETTER, STATIC_SETTER ->
+                MethodHandleDesc.ofField(dmhd.kind(), map(dmhd.owner()),
+                        dmhd.methodName(),
+                        map(ClassDesc.ofDescriptor(dmhd.lookupDescriptor())));
+            default ->
+                MethodHandleDesc.ofMethod(dmhd.kind(), map(dmhd.owner()),
+                        dmhd.methodName(),
+                        mapMethodDesc(MethodTypeDesc.ofDescriptor(dmhd.lookupDescriptor())));
+        };
+    }
+
+    ConstantDesc mapConstantValue(ConstantDesc value) {
+        return switch (value) {
+            case ClassDesc cd ->
+                map(cd);
+            case DynamicConstantDesc<?> dcd ->
+                mapDynamicConstant(dcd);
+            case DirectMethodHandleDesc dmhd ->
+                mapDirectMethodHandle(dmhd);
+            case MethodTypeDesc mtd ->
+                mapMethodDesc(mtd);
+            default -> value;
+        };
+    }
+
+    DynamicConstantDesc<?> mapDynamicConstant(DynamicConstantDesc<?> dcd) {
+        return DynamicConstantDesc.ofNamed(mapDirectMethodHandle(dcd.bootstrapMethod()),
+                dcd.constantName(),
+                map(dcd.constantType()),
+                dcd.bootstrapArgsList().stream().map(this::mapConstantValue).toArray(ConstantDesc[]::new));
+    }
+
+    @SuppressWarnings("unchecked")
+    <S extends Signature> S mapSignature(S signature) {
+        return (S) switch (signature) {
+            case Signature.ArrayTypeSig ats ->
+                Signature.ArrayTypeSig.of(mapSignature(ats.componentSignature()));
+            case Signature.ClassTypeSig cts ->
+                Signature.ClassTypeSig.of(
+                        cts.outerType().map(this::mapSignature).orElse(null),
+                        map(cts.classDesc()),
+                        cts.typeArgs().stream().map(ta -> switch (ta) {
+                            case Signature.TypeArg.Unbounded u -> u;
+                            case Signature.TypeArg.Bounded bta -> Signature.TypeArg.bounded(
+                                    bta.wildcardIndicator(), mapSignature(bta.boundType()));
+                        }).toArray(Signature.TypeArg[]::new));
+            default -> signature;
+        };
+    }
+
+    List<Annotation> mapAnnotations(List<Annotation> annotations) {
+        return annotations.stream().map(this::mapAnnotation).toList();
+    }
+
+    Annotation mapAnnotation(Annotation a) {
+        return Annotation.of(map(a.classSymbol()), a.elements().stream().map(el ->
+                AnnotationElement.of(el.name(), mapAnnotationValue(el.value()))).toList());
+    }
+
+    AnnotationValue mapAnnotationValue(AnnotationValue val) {
+        return switch (val) {
+            case AnnotationValue.OfAnnotation oa ->
+                AnnotationValue.ofAnnotation(mapAnnotation(oa.annotation()));
+            case AnnotationValue.OfArray oa ->
+                AnnotationValue.ofArray(oa.values().stream().map(this::mapAnnotationValue).toList());
+            case AnnotationValue.OfConstant oc -> oc;
+            case AnnotationValue.OfClass oc ->
+                AnnotationValue.ofClass(map(oc.classSymbol()));
+            case AnnotationValue.OfEnum oe ->
+                AnnotationValue.ofEnum(map(oe.classSymbol()), oe.constantName().stringValue());
+        };
+    }
+
+    List<TypeAnnotation> mapTypeAnnotations(List<TypeAnnotation> typeAnnotations) {
+        return typeAnnotations.stream().map(a -> TypeAnnotation.of(a.targetInfo(),
+                a.targetPath(), map(a.classSymbol()),
+                a.elements().stream().map(el -> AnnotationElement.of(el.name(),
+                        mapAnnotationValue(el.value()))).toList())).toList();
+    }
+
+    List<Signature.TypeParam> mapTypeParams(List<Signature.TypeParam> typeParams) {
+        return typeParams.stream().map(tp -> Signature.TypeParam.of(tp.identifier(),
+                tp.classBound().map(this::mapSignature),
+                tp.interfaceBounds().stream()
+                        .map(this::mapSignature).toArray(Signature.RefTypeSig[]::new))).toList();
+    }
+
+}
diff --git a/tests/test_data/std/jdk/internal/classfile/impl/CodeImpl$1.class b/tests/test_data/std/jdk/internal/classfile/impl/CodeImpl$1.class
new file mode 100644
index 0000000000000000000000000000000000000000..c892bd51875ca102723d620e27c4e30f0d931738
GIT binary patch
literal 1155
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/classfile/impl/CodeImpl$2.class b/tests/test_data/std/jdk/internal/classfile/impl/CodeImpl$2.class
new file mode 100644
index 0000000000000000000000000000000000000000..808bf565919182673554018d5af093e9ecd3c5de
GIT binary patch
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literal 0
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diff --git a/tests/test_data/std/jdk/internal/classfile/impl/CodeImpl$3.class b/tests/test_data/std/jdk/internal/classfile/impl/CodeImpl$3.class
new file mode 100644
index 0000000000000000000000000000000000000000..b39e04b6620f08e11feb07de2551e9a161056f9e
GIT binary patch
literal 1884
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literal 0
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diff --git a/tests/test_data/std/jdk/internal/classfile/impl/CodeImpl$4.class b/tests/test_data/std/jdk/internal/classfile/impl/CodeImpl$4.class
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diff --git a/tests/test_data/std/jdk/internal/classfile/impl/CodeImpl$ExceptionHandlerAction.class b/tests/test_data/std/jdk/internal/classfile/impl/CodeImpl$ExceptionHandlerAction.class
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GIT binary patch
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diff --git a/tests/test_data/std/jdk/internal/classfile/impl/CodeImpl.class b/tests/test_data/std/jdk/internal/classfile/impl/CodeImpl.class
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diff --git a/tests/test_data/std/jdk/internal/classfile/impl/CodeImpl.java b/tests/test_data/std/jdk/internal/classfile/impl/CodeImpl.java
new file mode 100644
index 00000000..06058bba
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/classfile/impl/CodeImpl.java
@@ -0,0 +1,495 @@
+/*
+ * Copyright (c) 2022, 2024, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package jdk.internal.classfile.impl;
+
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.List;
+import java.util.Optional;
+import java.util.function.Consumer;
+
+import java.lang.classfile.*;
+import java.lang.classfile.attribute.CodeAttribute;
+import java.lang.classfile.attribute.RuntimeInvisibleTypeAnnotationsAttribute;
+import java.lang.classfile.attribute.RuntimeVisibleTypeAnnotationsAttribute;
+import java.lang.classfile.attribute.StackMapTableAttribute;
+import java.lang.classfile.constantpool.ClassEntry;
+import java.lang.classfile.instruction.*;
+
+import static java.lang.classfile.ClassFile.*;
+
+public final class CodeImpl
+        extends BoundAttribute.BoundCodeAttribute
+        implements CodeModel, LabelContext {
+
+    static final Instruction[] SINGLETON_INSTRUCTIONS = new Instruction[256];
+
+    static {
+        for (var o : Opcode.values()) {
+            if (o.sizeIfFixed() == 1) {
+                SINGLETON_INSTRUCTIONS[o.bytecode()] = switch (o.kind()) {
+                    case ARRAY_LOAD -> ArrayLoadInstruction.of(o);
+                    case ARRAY_STORE -> ArrayStoreInstruction.of(o);
+                    case CONSTANT -> ConstantInstruction.ofIntrinsic(o);
+                    case CONVERT -> ConvertInstruction.of(o);
+                    case LOAD -> LoadInstruction.of(o, o.slot());
+                    case MONITOR -> MonitorInstruction.of(o);
+                    case NOP -> NopInstruction.of();
+                    case OPERATOR -> OperatorInstruction.of(o);
+                    case RETURN -> ReturnInstruction.of(o);
+                    case STACK -> StackInstruction.of(o);
+                    case STORE -> StoreInstruction.of(o, o.slot());
+                    case THROW_EXCEPTION -> ThrowInstruction.of();
+                    default -> throw new AssertionError("invalid opcode: " + o);
+                };
+            }
+        }
+    }
+
+    List<ExceptionCatch> exceptionTable;
+    List<Attribute<?>> attributes;
+
+    // Inflated for iteration
+    LabelImpl[] labels;
+    int[] lineNumbers;
+    boolean inflated;
+
+    public CodeImpl(AttributedElement enclosing,
+                    ClassReader reader,
+                    AttributeMapper<CodeAttribute> mapper,
+                    int payloadStart) {
+        super(enclosing, reader, mapper, payloadStart);
+    }
+
+    // LabelContext
+
+    @Override
+    public Label newLabel() {
+        throw new UnsupportedOperationException("CodeAttribute only supports fixed labels");
+    }
+
+    @Override
+    public void setLabelTarget(Label label, int bci) {
+        throw new UnsupportedOperationException("CodeAttribute only supports fixed labels");
+    }
+
+    @Override
+    public Label getLabel(int bci) {
+        if (bci < 0 || bci > codeLength)
+            throw new IllegalArgumentException(String.format("Bytecode offset out of range; bci=%d, codeLength=%d",
+                                                             bci, codeLength));
+        if (labels == null)
+            labels = new LabelImpl[codeLength + 1];
+        LabelImpl l = labels[bci];
+        if (l == null)
+            l = labels[bci] = new LabelImpl(this, bci);
+        return l;
+    }
+
+    @Override
+    public int labelToBci(Label label) {
+        LabelImpl lab = (LabelImpl) label;
+        if (lab.labelContext() != this)
+            throw new IllegalArgumentException(String.format("Illegal label reuse; context=%s, label=%s",
+                                                             this, lab.labelContext()));
+        return lab.getBCI();
+    }
+
+    private void inflateMetadata() {
+        if (!inflated) {
+            if (labels == null)
+                labels = new LabelImpl[codeLength + 1];
+            if (classReader.context().lineNumbersOption() == ClassFile.LineNumbersOption.PASS_LINE_NUMBERS)
+                inflateLineNumbers();
+            inflateJumpTargets();
+            inflateTypeAnnotations();
+            inflated = true;
+        }
+    }
+
+    // CodeAttribute
+
+    @Override
+    public List<Attribute<?>> attributes() {
+        if (attributes == null) {
+            attributes = BoundAttribute.readAttributes(this, classReader, attributePos, classReader.customAttributes());
+        }
+        return attributes;
+    }
+
+    @Override
+    public void writeTo(BufWriter buf) {
+        if (buf.canWriteDirect(classReader)) {
+            super.writeTo(buf);
+        }
+        else {
+            DirectCodeBuilder.build((MethodInfo) enclosingMethod,
+                                    new Consumer<CodeBuilder>() {
+                                        @Override
+                                        public void accept(CodeBuilder cb) {
+                                            forEachElement(cb);
+                                        }
+                                    },
+                                    (SplitConstantPool)buf.constantPool(),
+                                    ((BufWriterImpl)buf).context(),
+                                    null).writeTo(buf);
+        }
+    }
+
+    // CodeModel
+
+    @Override
+    public Optional<MethodModel> parent() {
+        return Optional.of(enclosingMethod);
+    }
+
+    @Override
+    public void forEachElement(Consumer<CodeElement> consumer) {
+        inflateMetadata();
+        boolean doLineNumbers = (lineNumbers != null);
+        generateCatchTargets(consumer);
+        if (classReader.context().debugElementsOption() == ClassFile.DebugElementsOption.PASS_DEBUG)
+            generateDebugElements(consumer);
+        for (int pos=codeStart; pos<codeEnd; ) {
+            if (labels[pos - codeStart] != null)
+                consumer.accept(labels[pos - codeStart]);
+            if (doLineNumbers && lineNumbers[pos - codeStart] != 0)
+                consumer.accept(LineNumberImpl.of(lineNumbers[pos - codeStart]));
+            int bc = classReader.readU1(pos);
+            Instruction instr = bcToInstruction(bc, pos);
+            consumer.accept(instr);
+            pos += instr.sizeInBytes();
+        }
+        // There might be labels pointing to the bci at codeEnd
+        if (labels[codeEnd-codeStart] != null)
+            consumer.accept(labels[codeEnd - codeStart]);
+        if (doLineNumbers && lineNumbers[codeEnd - codeStart] != 0)
+            consumer.accept(LineNumberImpl.of(lineNumbers[codeEnd - codeStart]));
+    }
+
+    @Override
+    public List<ExceptionCatch> exceptionHandlers() {
+        if (exceptionTable == null) {
+            inflateMetadata();
+            exceptionTable = new ArrayList<>(exceptionHandlerCnt);
+            iterateExceptionHandlers(new ExceptionHandlerAction() {
+                @Override
+                public void accept(int s, int e, int h, int c) {
+                    ClassEntry catchTypeEntry = c == 0
+                                                             ? null
+                                                             : constantPool().entryByIndex(c, ClassEntry.class);
+                    exceptionTable.add(new AbstractPseudoInstruction.ExceptionCatchImpl(getLabel(h), getLabel(s), getLabel(e), catchTypeEntry));
+                }
+            });
+            exceptionTable = Collections.unmodifiableList(exceptionTable);
+        }
+        return exceptionTable;
+    }
+
+    public boolean compareCodeBytes(BufWriter buf, int offset, int len) {
+        return codeLength == len
+               && classReader.compare(buf, offset, codeStart, codeLength);
+    }
+
+    private int adjustForObjectOrUninitialized(int bci) {
+        int vt = classReader.readU1(bci);
+        //inflate newTarget labels from Uninitialized VTIs
+        if (vt == 8) inflateLabel(classReader.readU2(bci + 1));
+        return (vt == 7 || vt == 8) ? bci + 3 : bci + 1;
+    }
+
+    private void inflateLabel(int bci) {
+        if (bci < 0 || bci > codeLength)
+            throw new IllegalArgumentException(String.format("Bytecode offset out of range; bci=%d, codeLength=%d",
+                                                             bci, codeLength));
+        if (labels[bci] == null)
+            labels[bci] = new LabelImpl(this, bci);
+    }
+
+    private void inflateLineNumbers() {
+        for (Attribute<?> a : attributes()) {
+            if (a.attributeMapper() == Attributes.lineNumberTable()) {
+                BoundLineNumberTableAttribute attr = (BoundLineNumberTableAttribute) a;
+                if (lineNumbers == null)
+                    lineNumbers = new int[codeLength + 1];
+
+                int nLn = classReader.readU2(attr.payloadStart);
+                int p = attr.payloadStart + 2;
+                int pEnd = p + (nLn * 4);
+                for (; p < pEnd; p += 4) {
+                    int startPc = classReader.readU2(p);
+                    if (startPc > codeLength) {
+                        throw new IllegalArgumentException(String.format(
+                                "Line number start_pc out of range; start_pc=%d, codeLength=%d", startPc, codeLength));
+                    }
+                    int lineNumber = classReader.readU2(p + 2);
+                    lineNumbers[startPc] = lineNumber;
+                }
+            }
+        }
+    }
+
+    private void inflateJumpTargets() {
+        Optional<StackMapTableAttribute> a = findAttribute(Attributes.stackMapTable());
+        if (a.isEmpty()) {
+            if (classReader.readU2(6) <= ClassFile.JAVA_6_VERSION) {
+                //fallback to jump targets inflation without StackMapTableAttribute
+                for (int pos=codeStart; pos<codeEnd; ) {
+                    var i = bcToInstruction(classReader.readU1(pos), pos);
+                    switch (i) {
+                        case BranchInstruction br -> br.target();
+                        case DiscontinuedInstruction.JsrInstruction jsr -> jsr.target();
+                        default -> {}
+                    }
+                    pos += i.sizeInBytes();
+                }
+            }
+            return;
+        }
+        @SuppressWarnings("unchecked")
+        int stackMapPos = ((BoundAttribute<StackMapTableAttribute>) a.get()).payloadStart;
+
+        int bci = -1; //compensate for offsetDelta + 1
+        int nEntries = classReader.readU2(stackMapPos);
+        int p = stackMapPos + 2;
+        for (int i = 0; i < nEntries; ++i) {
+            int frameType = classReader.readU1(p);
+            int offsetDelta;
+            if (frameType < 64) {
+                offsetDelta = frameType;
+                ++p;
+            }
+            else if (frameType < 128) {
+                offsetDelta = frameType & 0x3f;
+                p = adjustForObjectOrUninitialized(p + 1);
+            }
+            else
+                switch (frameType) {
+                    case 247 -> {
+                        offsetDelta = classReader.readU2(p + 1);
+                        p = adjustForObjectOrUninitialized(p + 3);
+                    }
+                    case 248, 249, 250, 251 -> {
+                        offsetDelta = classReader.readU2(p + 1);
+                        p += 3;
+                    }
+                    case 252, 253, 254 -> {
+                        offsetDelta = classReader.readU2(p + 1);
+                        int k = frameType - 251;
+                        p += 3;
+                        for (int c = 0; c < k; ++c) {
+                            p = adjustForObjectOrUninitialized(p);
+                        }
+                    }
+                    case 255 -> {
+                        offsetDelta = classReader.readU2(p + 1);
+                        p += 3;
+                        int k = classReader.readU2(p);
+                        p += 2;
+                        for (int c = 0; c < k; ++c) {
+                            p = adjustForObjectOrUninitialized(p);
+                        }
+                        k = classReader.readU2(p);
+                        p += 2;
+                        for (int c = 0; c < k; ++c) {
+                            p = adjustForObjectOrUninitialized(p);
+                        }
+                    }
+                    default -> throw new IllegalArgumentException("Bad frame type: " + frameType);
+                }
+            bci += offsetDelta + 1;
+            inflateLabel(bci);
+        }
+    }
+
+    private void inflateTypeAnnotations() {
+        findAttribute(Attributes.runtimeVisibleTypeAnnotations()).ifPresent(RuntimeVisibleTypeAnnotationsAttribute::annotations);
+        findAttribute(Attributes.runtimeInvisibleTypeAnnotations()).ifPresent(RuntimeInvisibleTypeAnnotationsAttribute::annotations);
+    }
+
+    private void generateCatchTargets(Consumer<CodeElement> consumer) {
+        // We attach all catch targets to bci zero, because trying to attach them
+        // to their range could subtly affect the order of exception processing
+        iterateExceptionHandlers(new ExceptionHandlerAction() {
+            @Override
+            public void accept(int s, int e, int h, int c) {
+                ClassEntry catchType = c == 0
+                                                    ? null
+                                                    : classReader.entryByIndex(c, ClassEntry.class);
+                consumer.accept(new AbstractPseudoInstruction.ExceptionCatchImpl(getLabel(h), getLabel(s), getLabel(e), catchType));
+            }
+        });
+    }
+
+    private void generateDebugElements(Consumer<CodeElement> consumer) {
+        for (Attribute<?> a : attributes()) {
+            if (a.attributeMapper() == Attributes.characterRangeTable()) {
+                var attr = (BoundCharacterRangeTableAttribute) a;
+                int cnt = classReader.readU2(attr.payloadStart);
+                int p = attr.payloadStart + 2;
+                int pEnd = p + (cnt * 14);
+                for (; p < pEnd; p += 14) {
+                    var instruction = new BoundCharacterRange(this, p);
+                    inflateLabel(instruction.startPc());
+                    inflateLabel(instruction.endPc() + 1);
+                    consumer.accept(instruction);
+                }
+            }
+            else if (a.attributeMapper() == Attributes.localVariableTable()) {
+                var attr = (BoundLocalVariableTableAttribute) a;
+                int cnt = classReader.readU2(attr.payloadStart);
+                int p = attr.payloadStart + 2;
+                int pEnd = p + (cnt * 10);
+                for (; p < pEnd; p += 10) {
+                    BoundLocalVariable instruction = new BoundLocalVariable(this, p);
+                    inflateLabel(instruction.startPc());
+                    inflateLabel(instruction.startPc() + instruction.length());
+                    consumer.accept(instruction);
+                }
+            }
+            else if (a.attributeMapper() == Attributes.localVariableTypeTable()) {
+                var attr = (BoundLocalVariableTypeTableAttribute) a;
+                int cnt = classReader.readU2(attr.payloadStart);
+                int p = attr.payloadStart + 2;
+                int pEnd = p + (cnt * 10);
+                for (; p < pEnd; p += 10) {
+                    BoundLocalVariableType instruction = new BoundLocalVariableType(this, p);
+                    inflateLabel(instruction.startPc());
+                    inflateLabel(instruction.startPc() + instruction.length());
+                    consumer.accept(instruction);
+                }
+            }
+            else if (a.attributeMapper() == Attributes.runtimeVisibleTypeAnnotations()) {
+                consumer.accept((BoundRuntimeVisibleTypeAnnotationsAttribute) a);
+            }
+            else if (a.attributeMapper() == Attributes.runtimeInvisibleTypeAnnotations()) {
+                consumer.accept((BoundRuntimeInvisibleTypeAnnotationsAttribute) a);
+            }
+        }
+    }
+
+    public interface ExceptionHandlerAction {
+        void accept(int start, int end, int handler, int catchTypeIndex);
+    }
+
+    public void iterateExceptionHandlers(ExceptionHandlerAction a) {
+        int p = exceptionHandlerPos + 2;
+        for (int i = 0; i < exceptionHandlerCnt; ++i) {
+            a.accept(classReader.readU2(p), classReader.readU2(p + 2), classReader.readU2(p + 4), classReader.readU2(p + 6));
+            p += 8;
+        }
+    }
+
+    private Instruction bcToInstruction(int bc, int pos) {
+        return switch (bc) {
+            case BIPUSH -> new AbstractInstruction.BoundArgumentConstantInstruction(Opcode.BIPUSH, CodeImpl.this, pos);
+            case SIPUSH -> new AbstractInstruction.BoundArgumentConstantInstruction(Opcode.SIPUSH, CodeImpl.this, pos);
+            case LDC -> new AbstractInstruction.BoundLoadConstantInstruction(Opcode.LDC, CodeImpl.this, pos);
+            case LDC_W -> new AbstractInstruction.BoundLoadConstantInstruction(Opcode.LDC_W, CodeImpl.this, pos);
+            case LDC2_W -> new AbstractInstruction.BoundLoadConstantInstruction(Opcode.LDC2_W, CodeImpl.this, pos);
+            case ILOAD -> new AbstractInstruction.BoundLoadInstruction(Opcode.ILOAD, CodeImpl.this, pos);
+            case LLOAD -> new AbstractInstruction.BoundLoadInstruction(Opcode.LLOAD, CodeImpl.this, pos);
+            case FLOAD -> new AbstractInstruction.BoundLoadInstruction(Opcode.FLOAD, CodeImpl.this, pos);
+            case DLOAD -> new AbstractInstruction.BoundLoadInstruction(Opcode.DLOAD, CodeImpl.this, pos);
+            case ALOAD -> new AbstractInstruction.BoundLoadInstruction(Opcode.ALOAD, CodeImpl.this, pos);
+            case ISTORE -> new AbstractInstruction.BoundStoreInstruction(Opcode.ISTORE, CodeImpl.this, pos);
+            case LSTORE -> new AbstractInstruction.BoundStoreInstruction(Opcode.LSTORE, CodeImpl.this, pos);
+            case FSTORE -> new AbstractInstruction.BoundStoreInstruction(Opcode.FSTORE, CodeImpl.this, pos);
+            case DSTORE -> new AbstractInstruction.BoundStoreInstruction(Opcode.DSTORE, CodeImpl.this, pos);
+            case ASTORE -> new AbstractInstruction.BoundStoreInstruction(Opcode.ASTORE, CodeImpl.this, pos);
+            case IINC -> new AbstractInstruction.BoundIncrementInstruction(Opcode.IINC, CodeImpl.this, pos);
+            case IFEQ -> new AbstractInstruction.BoundBranchInstruction(Opcode.IFEQ, CodeImpl.this, pos);
+            case IFNE -> new AbstractInstruction.BoundBranchInstruction(Opcode.IFNE, CodeImpl.this, pos);
+            case IFLT -> new AbstractInstruction.BoundBranchInstruction(Opcode.IFLT, CodeImpl.this, pos);
+            case IFGE -> new AbstractInstruction.BoundBranchInstruction(Opcode.IFGE, CodeImpl.this, pos);
+            case IFGT -> new AbstractInstruction.BoundBranchInstruction(Opcode.IFGT, CodeImpl.this, pos);
+            case IFLE -> new AbstractInstruction.BoundBranchInstruction(Opcode.IFLE, CodeImpl.this, pos);
+            case IF_ICMPEQ -> new AbstractInstruction.BoundBranchInstruction(Opcode.IF_ICMPEQ, CodeImpl.this, pos);
+            case IF_ICMPNE -> new AbstractInstruction.BoundBranchInstruction(Opcode.IF_ICMPNE, CodeImpl.this, pos);
+            case IF_ICMPLT -> new AbstractInstruction.BoundBranchInstruction(Opcode.IF_ICMPLT, CodeImpl.this, pos);
+            case IF_ICMPGE -> new AbstractInstruction.BoundBranchInstruction(Opcode.IF_ICMPGE, CodeImpl.this, pos);
+            case IF_ICMPGT -> new AbstractInstruction.BoundBranchInstruction(Opcode.IF_ICMPGT, CodeImpl.this, pos);
+            case IF_ICMPLE -> new AbstractInstruction.BoundBranchInstruction(Opcode.IF_ICMPLE, CodeImpl.this, pos);
+            case IF_ACMPEQ -> new AbstractInstruction.BoundBranchInstruction(Opcode.IF_ACMPEQ, CodeImpl.this, pos);
+            case IF_ACMPNE -> new AbstractInstruction.BoundBranchInstruction(Opcode.IF_ACMPNE, CodeImpl.this, pos);
+            case GOTO -> new AbstractInstruction.BoundBranchInstruction(Opcode.GOTO, CodeImpl.this, pos);
+            case TABLESWITCH -> new AbstractInstruction.BoundTableSwitchInstruction(Opcode.TABLESWITCH, CodeImpl.this, pos);
+            case LOOKUPSWITCH -> new AbstractInstruction.BoundLookupSwitchInstruction(Opcode.LOOKUPSWITCH, CodeImpl.this, pos);
+            case GETSTATIC -> new AbstractInstruction.BoundFieldInstruction(Opcode.GETSTATIC, CodeImpl.this, pos);
+            case PUTSTATIC -> new AbstractInstruction.BoundFieldInstruction(Opcode.PUTSTATIC, CodeImpl.this, pos);
+            case GETFIELD -> new AbstractInstruction.BoundFieldInstruction(Opcode.GETFIELD, CodeImpl.this, pos);
+            case PUTFIELD -> new AbstractInstruction.BoundFieldInstruction(Opcode.PUTFIELD, CodeImpl.this, pos);
+            case INVOKEVIRTUAL -> new AbstractInstruction.BoundInvokeInstruction(Opcode.INVOKEVIRTUAL, CodeImpl.this, pos);
+            case INVOKESPECIAL -> new AbstractInstruction.BoundInvokeInstruction(Opcode.INVOKESPECIAL, CodeImpl.this, pos);
+            case INVOKESTATIC -> new AbstractInstruction.BoundInvokeInstruction(Opcode.INVOKESTATIC, CodeImpl.this, pos);
+            case INVOKEINTERFACE -> new AbstractInstruction.BoundInvokeInterfaceInstruction(Opcode.INVOKEINTERFACE, CodeImpl.this, pos);
+            case INVOKEDYNAMIC -> new AbstractInstruction.BoundInvokeDynamicInstruction(Opcode.INVOKEDYNAMIC, CodeImpl.this, pos);
+            case NEW -> new AbstractInstruction.BoundNewObjectInstruction(CodeImpl.this, pos);
+            case NEWARRAY -> new AbstractInstruction.BoundNewPrimitiveArrayInstruction(Opcode.NEWARRAY, CodeImpl.this, pos);
+            case ANEWARRAY -> new AbstractInstruction.BoundNewReferenceArrayInstruction(Opcode.ANEWARRAY, CodeImpl.this, pos);
+            case CHECKCAST -> new AbstractInstruction.BoundTypeCheckInstruction(Opcode.CHECKCAST, CodeImpl.this, pos);
+            case INSTANCEOF -> new AbstractInstruction.BoundTypeCheckInstruction(Opcode.INSTANCEOF, CodeImpl.this, pos);
+
+            case WIDE -> {
+                int bclow = classReader.readU1(pos + 1);
+                yield switch (bclow) {
+                    case ILOAD -> new AbstractInstruction.BoundLoadInstruction(Opcode.ILOAD_W, this, pos);
+                    case LLOAD -> new AbstractInstruction.BoundLoadInstruction(Opcode.LLOAD_W, this, pos);
+                    case FLOAD -> new AbstractInstruction.BoundLoadInstruction(Opcode.FLOAD_W, this, pos);
+                    case DLOAD -> new AbstractInstruction.BoundLoadInstruction(Opcode.DLOAD_W, this, pos);
+                    case ALOAD -> new AbstractInstruction.BoundLoadInstruction(Opcode.ALOAD_W, this, pos);
+                    case ISTORE -> new AbstractInstruction.BoundStoreInstruction(Opcode.ISTORE_W, this, pos);
+                    case LSTORE -> new AbstractInstruction.BoundStoreInstruction(Opcode.LSTORE_W, this, pos);
+                    case FSTORE -> new AbstractInstruction.BoundStoreInstruction(Opcode.FSTORE_W, this, pos);
+                    case DSTORE -> new AbstractInstruction.BoundStoreInstruction(Opcode.DSTORE_W, this, pos);
+                    case ASTORE -> new AbstractInstruction.BoundStoreInstruction(Opcode.ASTORE_W, this, pos);
+                    case IINC -> new AbstractInstruction.BoundIncrementInstruction(Opcode.IINC_W, this, pos);
+                    case RET ->  new AbstractInstruction.BoundRetInstruction(Opcode.RET_W, this, pos);
+                    default -> throw new IllegalArgumentException("unknown wide instruction: " + bclow);
+                };
+            }
+
+            case MULTIANEWARRAY -> new AbstractInstruction.BoundNewMultidimensionalArrayInstruction(Opcode.MULTIANEWARRAY, CodeImpl.this, pos);
+            case IFNULL -> new AbstractInstruction.BoundBranchInstruction(Opcode.IFNULL, CodeImpl.this, pos);
+            case IFNONNULL -> new AbstractInstruction.BoundBranchInstruction(Opcode.IFNONNULL, CodeImpl.this, pos);
+            case GOTO_W -> new AbstractInstruction.BoundBranchInstruction(Opcode.GOTO_W, CodeImpl.this, pos);
+
+            case JSR -> new AbstractInstruction.BoundJsrInstruction(Opcode.JSR, CodeImpl.this, pos);
+            case RET ->  new AbstractInstruction.BoundRetInstruction(Opcode.RET, this, pos);
+            case JSR_W -> new AbstractInstruction.BoundJsrInstruction(Opcode.JSR_W, CodeImpl.this, pos);
+            default -> {
+                Instruction instr = SINGLETON_INSTRUCTIONS[bc];
+                if (instr == null)
+                    throw new IllegalArgumentException("unknown instruction: " + bc);
+                yield instr;
+            }
+        };
+    }
+
+    @Override
+    public String toString() {
+        return String.format("CodeModel[id=%d]", System.identityHashCode(this));
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/classfile/impl/CodeLocalsShifterImpl.class b/tests/test_data/std/jdk/internal/classfile/impl/CodeLocalsShifterImpl.class
new file mode 100644
index 0000000000000000000000000000000000000000..6e23d14bb8beaf1ea2e5500bf13bf4c00bf494d9
GIT binary patch
literal 4774
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X;ukz^<h_kw;@7qH_zm8`@6q&s#P=r~

literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/classfile/impl/CodeLocalsShifterImpl.java b/tests/test_data/std/jdk/internal/classfile/impl/CodeLocalsShifterImpl.java
new file mode 100644
index 00000000..a68225fb
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/classfile/impl/CodeLocalsShifterImpl.java
@@ -0,0 +1,99 @@
+/*
+ * Copyright (c) 2023, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package jdk.internal.classfile.impl;
+
+import java.lang.classfile.CodeBuilder;
+import java.lang.classfile.CodeElement;
+import java.lang.classfile.Signature;
+import java.lang.classfile.TypeKind;
+import java.lang.classfile.components.CodeLocalsShifter;
+import java.lang.classfile.instruction.IncrementInstruction;
+import java.lang.classfile.instruction.LoadInstruction;
+import java.lang.classfile.instruction.LocalVariable;
+import java.lang.classfile.instruction.LocalVariableType;
+import java.lang.classfile.instruction.StoreInstruction;
+
+import java.util.Arrays;
+
+public final class CodeLocalsShifterImpl implements CodeLocalsShifter {
+
+    private int[] locals = new int[0];
+    private final int fixed;
+
+    public CodeLocalsShifterImpl(int fixed) {
+        this.fixed = fixed;
+    }
+
+    @Override
+    public void accept(CodeBuilder cob, CodeElement coe) {
+        switch (coe) {
+            case LoadInstruction li ->
+                cob.loadLocal(
+                        li.typeKind(),
+                        shift(cob, li.slot(), li.typeKind()));
+            case StoreInstruction si ->
+                cob.storeLocal(
+                        si.typeKind(),
+                        shift(cob, si.slot(), si.typeKind()));
+            case IncrementInstruction ii ->
+                cob.iinc(
+                        shift(cob, ii.slot(), TypeKind.IntType),
+                        ii.constant());
+            case LocalVariable lv ->
+                cob.localVariable(
+                        shift(cob, lv.slot(), TypeKind.fromDescriptor(lv.type().stringValue())),
+                        lv.name(),
+                        lv.type(),
+                        lv.startScope(),
+                        lv.endScope());
+            case LocalVariableType lvt ->
+                cob.localVariableType(
+                        shift(cob, lvt.slot(),
+                                (lvt.signatureSymbol() instanceof Signature.BaseTypeSig bsig)
+                                        ? TypeKind.fromDescriptor(bsig.signatureString())
+                                        : TypeKind.ReferenceType),
+                        lvt.name(),
+                        lvt.signature(),
+                        lvt.startScope(),
+                        lvt.endScope());
+            default -> cob.with(coe);
+        }
+    }
+
+    private int shift(CodeBuilder cob, int slot, TypeKind tk) {
+        if (tk == TypeKind.VoidType)  throw new IllegalArgumentException("Illegal local void type");
+        if (slot >= fixed) {
+            int key = 2*slot - fixed + tk.slotSize() - 1;
+            if (key >= locals.length) locals = Arrays.copyOf(locals, key + 20);
+            slot = locals[key] - 1;
+            if (slot < 0) {
+                slot = cob.allocateLocal(tk);
+                locals[key] = slot + 1;
+                if (tk.slotSize() == 2) locals[key - 1] = slot + 1;
+            }
+        }
+        return slot;
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/classfile/impl/CodeRelabelerImpl.class b/tests/test_data/std/jdk/internal/classfile/impl/CodeRelabelerImpl.class
new file mode 100644
index 0000000000000000000000000000000000000000..4a20e102a92ac2595862f57e9fbe733060c5d7ba
GIT binary patch
literal 8317
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/classfile/impl/CodeRelabelerImpl.java b/tests/test_data/std/jdk/internal/classfile/impl/CodeRelabelerImpl.java
new file mode 100644
index 00000000..f191cbf3
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/classfile/impl/CodeRelabelerImpl.java
@@ -0,0 +1,108 @@
+/*
+ * Copyright (c) 2023, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package jdk.internal.classfile.impl;
+
+import java.lang.classfile.CodeBuilder;
+import java.lang.classfile.CodeElement;
+import java.lang.classfile.Label;
+import java.lang.classfile.components.CodeRelabeler;
+import java.lang.classfile.instruction.BranchInstruction;
+import java.lang.classfile.instruction.CharacterRange;
+import java.lang.classfile.instruction.ExceptionCatch;
+import java.lang.classfile.instruction.LabelTarget;
+import java.lang.classfile.instruction.LocalVariable;
+import java.lang.classfile.instruction.LocalVariableType;
+import java.lang.classfile.instruction.LookupSwitchInstruction;
+import java.lang.classfile.instruction.SwitchCase;
+import java.lang.classfile.instruction.TableSwitchInstruction;
+
+import java.util.function.BiFunction;
+
+public record CodeRelabelerImpl(BiFunction<Label, CodeBuilder, Label> mapFunction) implements CodeRelabeler {
+
+    @Override
+    public Label relabel(Label label, CodeBuilder cob) {
+        return mapFunction.apply(label, cob);
+    }
+
+    @Override
+    public void accept(CodeBuilder cob, CodeElement coe) {
+        switch (coe) {
+            case BranchInstruction bi ->
+                cob.branch(
+                        bi.opcode(),
+                        relabel(bi.target(), cob));
+            case LookupSwitchInstruction lsi ->
+                cob.lookupswitch(
+                        relabel(lsi.defaultTarget(), cob),
+                        lsi.cases().stream().map(c ->
+                                SwitchCase.of(
+                                        c.caseValue(),
+                                        relabel(c.target(), cob))).toList());
+            case TableSwitchInstruction tsi ->
+                cob.tableswitch(
+                        tsi.lowValue(),
+                        tsi.highValue(),
+                        relabel(tsi.defaultTarget(), cob),
+                        tsi.cases().stream().map(c ->
+                                SwitchCase.of(
+                                        c.caseValue(),
+                                        relabel(c.target(), cob))).toList());
+            case LabelTarget lt ->
+                cob.labelBinding(
+                        relabel(lt.label(), cob));
+            case ExceptionCatch ec ->
+                cob.exceptionCatch(
+                        relabel(ec.tryStart(), cob),
+                        relabel(ec.tryEnd(), cob),
+                        relabel(ec.handler(), cob),
+                        ec.catchType());
+            case LocalVariable lv ->
+                cob.localVariable(
+                        lv.slot(),
+                        lv.name().stringValue(),
+                        lv.typeSymbol(),
+                        relabel(lv.startScope(), cob),
+                        relabel(lv.endScope(), cob));
+            case LocalVariableType lvt ->
+                cob.localVariableType(
+                        lvt.slot(),
+                        lvt.name().stringValue(),
+                        lvt.signatureSymbol(),
+                        relabel(lvt.startScope(), cob),
+                        relabel(lvt.endScope(), cob));
+            case CharacterRange chr ->
+                cob.characterRange(
+                        relabel(chr.startScope(), cob),
+                        relabel(chr.endScope(), cob),
+                        chr.characterRangeStart(),
+                        chr.characterRangeEnd(),
+                        chr.flags());
+            default ->
+                cob.with(coe);
+        }
+    }
+
+}
diff --git a/tests/test_data/std/jdk/internal/classfile/impl/CodeStackTrackerImpl$1.class b/tests/test_data/std/jdk/internal/classfile/impl/CodeStackTrackerImpl$1.class
new file mode 100644
index 0000000000000000000000000000000000000000..0329f251e35c5fda6933fa8bf66eef990cebd5e2
GIT binary patch
literal 1622
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/classfile/impl/CodeStackTrackerImpl$Item.class b/tests/test_data/std/jdk/internal/classfile/impl/CodeStackTrackerImpl$Item.class
new file mode 100644
index 0000000000000000000000000000000000000000..38d49c5136cbba4cff03511e48c9bedc3f725965
GIT binary patch
literal 1904
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/classfile/impl/CodeStackTrackerImpl$Stack$1.class b/tests/test_data/std/jdk/internal/classfile/impl/CodeStackTrackerImpl$Stack$1.class
new file mode 100644
index 0000000000000000000000000000000000000000..22cd7af5bc970d86fb623e24c596f8e35b1fc732
GIT binary patch
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/classfile/impl/CodeStackTrackerImpl$Stack.class b/tests/test_data/std/jdk/internal/classfile/impl/CodeStackTrackerImpl$Stack.class
new file mode 100644
index 0000000000000000000000000000000000000000..f0a1b08ba6a4339a5795527d2792b24beaa15414
GIT binary patch
literal 2219
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/classfile/impl/CodeStackTrackerImpl.class b/tests/test_data/std/jdk/internal/classfile/impl/CodeStackTrackerImpl.class
new file mode 100644
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GIT binary patch
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HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/classfile/impl/CodeStackTrackerImpl.java b/tests/test_data/std/jdk/internal/classfile/impl/CodeStackTrackerImpl.java
new file mode 100644
index 00000000..2b87821b
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/classfile/impl/CodeStackTrackerImpl.java
@@ -0,0 +1,346 @@
+/*
+ * Copyright (c) 2023, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package jdk.internal.classfile.impl;
+
+import java.lang.classfile.CodeBuilder;
+import java.lang.classfile.CodeElement;
+import java.lang.classfile.Label;
+import java.lang.classfile.Opcode;
+import java.lang.classfile.TypeKind;
+import java.lang.classfile.components.CodeStackTracker;
+import java.lang.classfile.instruction.ArrayLoadInstruction;
+import java.lang.classfile.instruction.ArrayStoreInstruction;
+import java.lang.classfile.instruction.BranchInstruction;
+import java.lang.classfile.instruction.ConstantInstruction;
+import java.lang.classfile.instruction.ConvertInstruction;
+import java.lang.classfile.instruction.ExceptionCatch;
+import java.lang.classfile.instruction.FieldInstruction;
+import java.lang.classfile.instruction.InvokeDynamicInstruction;
+import java.lang.classfile.instruction.InvokeInstruction;
+import java.lang.classfile.instruction.LabelTarget;
+import java.lang.classfile.instruction.LoadInstruction;
+import java.lang.classfile.instruction.LookupSwitchInstruction;
+import java.lang.classfile.instruction.MonitorInstruction;
+import java.lang.classfile.instruction.NewMultiArrayInstruction;
+import java.lang.classfile.instruction.NewObjectInstruction;
+import java.lang.classfile.instruction.NewPrimitiveArrayInstruction;
+import java.lang.classfile.instruction.NewReferenceArrayInstruction;
+import java.lang.classfile.instruction.NopInstruction;
+import java.lang.classfile.instruction.OperatorInstruction;
+import java.lang.classfile.instruction.ReturnInstruction;
+import java.lang.classfile.instruction.StackInstruction;
+import java.lang.classfile.instruction.StoreInstruction;
+import java.lang.classfile.instruction.TableSwitchInstruction;
+import java.lang.classfile.instruction.ThrowInstruction;
+import java.lang.classfile.instruction.TypeCheckInstruction;
+
+import java.util.AbstractCollection;
+import java.util.Collection;
+import java.util.HashMap;
+import java.util.Iterator;
+import java.util.Map;
+import java.util.NoSuchElementException;
+import java.util.Optional;
+import java.util.function.Consumer;
+
+public final class CodeStackTrackerImpl implements CodeStackTracker {
+
+    private static record Item(TypeKind type, Item next) {
+    }
+
+    private final class Stack extends AbstractCollection<TypeKind> {
+
+        private Item top;
+        private int count, realSize;
+
+        Stack(Item top, int count, int realSize) {
+            this.top = top;
+            this.count = count;
+            this.realSize = realSize;
+        }
+
+        @Override
+        public Iterator<TypeKind> iterator() {
+            return new Iterator<TypeKind>() {
+                Item i = top;
+
+                @Override
+                public boolean hasNext() {
+                    return i != null;
+                }
+
+                @Override
+                public TypeKind next() {
+                    if (i == null) {
+                        throw new NoSuchElementException();
+                    }
+                    var t = i.type;
+                    i = i.next;
+                    return t;
+                }
+            };
+        }
+
+        @Override
+        public int size() {
+            return count;
+        }
+
+        private void push(TypeKind type) {
+            top = new Item(type, top);
+            realSize += type.slotSize();
+            count++;
+            if (maxSize != null && realSize > maxSize) maxSize = realSize;
+        }
+
+        private TypeKind pop() {
+            var t = top.type;
+            realSize -= t.slotSize();
+            count--;
+            top = top.next;
+            return t;
+        }
+    }
+
+    private Stack stack = new Stack(null, 0, 0);
+    private Integer maxSize = 0;
+
+    public CodeStackTrackerImpl(TypeKind... initialStack) {
+        for (int i = initialStack.length - 1; i >= 0; i--)
+            push(initialStack[i]);
+    }
+
+    @Override
+    public Optional<Collection<TypeKind>> stack() {
+        return Optional.ofNullable(fork());
+    }
+
+    @Override
+    public Optional<Integer> maxStackSize() {
+        return Optional.ofNullable(maxSize);
+    }
+
+    private final Map<Label, Stack> map = new HashMap<>();
+
+    private void push(TypeKind type) {
+        if (stack != null) {
+            if (type != TypeKind.VoidType) stack.push(type);
+        } else {
+            maxSize = null;
+        }
+    }
+
+    private void pop(int i) {
+        if (stack != null) {
+            while (i-- > 0) stack.pop();
+        } else {
+            maxSize = null;
+        }
+    }
+
+    private Stack fork() {
+        return stack == null ? null : new Stack(stack.top, stack.count, stack.realSize);
+    }
+
+    private void withStack(Consumer<Stack> c) {
+        if (stack != null) c.accept(stack);
+        else maxSize = null;
+    }
+
+    @Override
+    public void accept(CodeBuilder cb, CodeElement el) {
+        cb.with(el);
+        switch (el) {
+            case ArrayLoadInstruction i -> {
+                pop(2);push(i.typeKind());
+            }
+            case ArrayStoreInstruction i ->
+                pop(3);
+            case BranchInstruction i -> {
+                if (i.opcode() == Opcode.GOTO || i.opcode() == Opcode.GOTO_W) {
+                    map.put(i.target(), stack);
+                    stack = null;
+                } else {
+                    pop(1);
+                    map.put(i.target(), fork());
+                }
+            }
+            case ConstantInstruction i ->
+                push(i.typeKind());
+            case ConvertInstruction i -> {
+                pop(1);push(i.toType());
+            }
+            case FieldInstruction i -> {
+                switch (i.opcode()) {
+                    case GETSTATIC ->
+                        push(TypeKind.fromDescriptor(i.type().stringValue()));
+                    case GETFIELD -> {
+                        pop(1);push(TypeKind.fromDescriptor(i.type().stringValue()));
+                    }
+                    case PUTSTATIC ->
+                        pop(1);
+                    case PUTFIELD ->
+                        pop(2);
+                }
+            }
+            case InvokeDynamicInstruction i -> {
+                var type = i.typeSymbol();
+                pop(type.parameterCount());
+                push(TypeKind.from(type.returnType()));
+            }
+            case InvokeInstruction i -> {
+                var type = i.typeSymbol();
+                pop(type.parameterCount());
+                if (i.opcode() != Opcode.INVOKESTATIC) pop(1);
+                push(TypeKind.from(type.returnType()));
+            }
+            case LoadInstruction i ->
+                push(i.typeKind());
+            case StoreInstruction i ->
+                pop(1);
+            case LookupSwitchInstruction i -> {
+                map.put(i.defaultTarget(), stack);
+                for (var c : i.cases()) map.put(c.target(), fork());
+                stack = null;
+            }
+            case MonitorInstruction i ->
+                pop(1);
+            case NewMultiArrayInstruction i -> {
+                pop(i.dimensions());push(TypeKind.ReferenceType);
+            }
+            case NewObjectInstruction i ->
+                push(TypeKind.ReferenceType);
+            case NewPrimitiveArrayInstruction i -> {
+                pop(1);push(TypeKind.ReferenceType);
+            }
+            case NewReferenceArrayInstruction i -> {
+                pop(1);push(TypeKind.ReferenceType);
+            }
+            case NopInstruction i -> {}
+            case OperatorInstruction i -> {
+                switch (i.opcode()) {
+                    case ARRAYLENGTH, INEG, LNEG, FNEG, DNEG -> pop(1);
+                    default -> pop(2);
+                }
+                push(i.typeKind());
+            }
+            case ReturnInstruction i ->
+                stack = null;
+            case StackInstruction i -> {
+                switch (i.opcode()) {
+                    case POP -> pop(1);
+                    case POP2 -> withStack(s -> {
+                        if (s.pop().slotSize() == 1) s.pop();
+                    });
+                    case DUP ->  withStack(s -> {
+                        var v = s.pop();s.push(v);s.push(v);
+                    });
+                    case DUP2 -> withStack(s -> {
+                        var v1 = s.pop();
+                        if (v1.slotSize() == 1) {
+                            var v2 = s.pop();
+                            s.push(v2);s.push(v1);
+                            s.push(v2);s.push(v1);
+                        } else {
+                            s.push(v1);s.push(v1);
+                        }
+                    });
+                    case DUP_X1 -> withStack(s -> {
+                        var v1 = s.pop();
+                        var v2 = s.pop();
+                        s.push(v1);s.push(v2);s.push(v1);
+                    });
+                    case DUP_X2 -> withStack(s -> {
+                        var v1 = s.pop();
+                        var v2 = s.pop();
+                        if (v2.slotSize() == 1) {
+                            var v3 = s.pop();
+                            s.push(v1);s.push(v3);s.push(v2);s.push(v1);
+                        } else {
+                            s.push(v1);s.push(v2);s.push(v1);
+                        }
+                    });
+                    case DUP2_X1 -> withStack(s -> {
+                        var v1 = s.pop();
+                        var v2 = s.pop();
+                        if (v1.slotSize() == 1) {
+                            var v3 = s.pop();
+                            s.push(v2);s.push(v1);s.push(v3);s.push(v2);s.push(v1);
+                        } else {
+                            s.push(v1);s.push(v2);s.push(v1);
+                        }
+                    });
+                    case DUP2_X2 -> withStack(s -> {
+                        var v1 = s.pop();
+                        var v2 = s.pop();
+                        if (v1.slotSize() == 1) {
+                            var v3 = s.pop();
+                            if (v3.slotSize() == 1) {
+                                var v4 = s.pop();
+                                s.push(v2);s.push(v1);s.push(v4);s.push(v3);s.push(v2);s.push(v1);
+                            } else {
+                                s.push(v2);s.push(v1);s.push(v3);s.push(v2);s.push(v1);
+                            }
+                        } else {
+                            if (v2.slotSize() == 1) {
+                                var v3 = s.pop();
+                                s.push(v1);s.push(v3);s.push(v2);s.push(v1);
+                            } else {
+                                s.push(v1);s.push(v2);s.push(v1);
+                            }
+                        }
+                    });
+                    case SWAP -> withStack(s -> {
+                        var v1 = s.pop();
+                        var v2 = s.pop();
+                        s.push(v1);s.push(v2);
+                    });
+                }
+            }
+            case TableSwitchInstruction i -> {
+                map.put(i.defaultTarget(), stack);
+                for (var c : i.cases()) map.put(c.target(), fork());
+                stack = null;
+            }
+            case ThrowInstruction i ->
+                stack = null;
+            case TypeCheckInstruction i -> {
+                switch (i.opcode()) {
+                    case CHECKCAST -> {
+                        pop(1);push(TypeKind.ReferenceType);
+                    }
+                    case INSTANCEOF -> {
+                        pop(1);push(TypeKind.IntType);
+                    }
+                }
+            }
+            case ExceptionCatch i ->
+                map.put(i.handler(), new Stack(new Item(TypeKind.ReferenceType, null), 1, 1));
+            case LabelTarget i ->
+                stack = map.getOrDefault(i.label(), stack);
+            default -> {}
+        }
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/classfile/impl/DirectClassBuilder.class b/tests/test_data/std/jdk/internal/classfile/impl/DirectClassBuilder.class
new file mode 100644
index 0000000000000000000000000000000000000000..8761d42888df397a12147b067f49993db6061344
GIT binary patch
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diff --git a/tests/test_data/std/jdk/internal/classfile/impl/DirectClassBuilder.java b/tests/test_data/std/jdk/internal/classfile/impl/DirectClassBuilder.java
new file mode 100644
index 00000000..915c3ad8
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/classfile/impl/DirectClassBuilder.java
@@ -0,0 +1,208 @@
+/*
+ * Copyright (c) 2022, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package jdk.internal.classfile.impl;
+
+import java.lang.constant.ConstantDescs;
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.List;
+import java.util.function.Consumer;
+
+import java.lang.classfile.BufWriter;
+import java.lang.classfile.ClassBuilder;
+import java.lang.classfile.ClassElement;
+import java.lang.classfile.ClassModel;
+import java.lang.classfile.ClassFile;
+import java.lang.classfile.CustomAttribute;
+import java.lang.classfile.constantpool.ClassEntry;
+import java.lang.classfile.FieldBuilder;
+import java.lang.classfile.FieldModel;
+import java.lang.classfile.FieldTransform;
+import java.lang.classfile.MethodBuilder;
+import java.lang.classfile.MethodModel;
+import java.lang.classfile.MethodTransform;
+import java.lang.classfile.WritableElement;
+import java.lang.classfile.constantpool.Utf8Entry;
+
+public final class DirectClassBuilder
+        extends AbstractDirectBuilder<ClassModel>
+        implements ClassBuilder {
+
+    final ClassEntry thisClassEntry;
+    private final List<WritableElement<FieldModel>> fields = new ArrayList<>();
+    private final List<WritableElement<MethodModel>> methods = new ArrayList<>();
+    private ClassEntry superclassEntry;
+    private List<ClassEntry> interfaceEntries;
+    private int majorVersion;
+    private int minorVersion;
+    private int flags;
+    private int sizeHint;
+
+    public DirectClassBuilder(SplitConstantPool constantPool,
+                              ClassFileImpl context,
+                              ClassEntry thisClass) {
+        super(constantPool, context);
+        this.thisClassEntry = AbstractPoolEntry.maybeClone(constantPool, thisClass);
+        this.flags = ClassFile.DEFAULT_CLASS_FLAGS;
+        this.superclassEntry = null;
+        this.interfaceEntries = Collections.emptyList();
+        this.majorVersion = ClassFile.latestMajorVersion();
+        this.minorVersion = ClassFile.latestMinorVersion();
+    }
+
+    @Override
+    public ClassBuilder with(ClassElement element) {
+        if (element instanceof AbstractElement ae) {
+            ae.writeTo(this);
+        } else {
+            writeAttribute((CustomAttribute)element);
+        }
+        return this;
+    }
+
+    @Override
+    public ClassBuilder withField(Utf8Entry name,
+                                  Utf8Entry descriptor,
+                                  Consumer<? super FieldBuilder> handler) {
+        return withField(new DirectFieldBuilder(constantPool, context, name, descriptor, null)
+                                 .run(handler));
+    }
+
+    @Override
+    public ClassBuilder transformField(FieldModel field, FieldTransform transform) {
+        DirectFieldBuilder builder = new DirectFieldBuilder(constantPool, context, field.fieldName(),
+                                                            field.fieldType(), field);
+        builder.transform(field, transform);
+        return withField(builder);
+    }
+
+    @Override
+    public ClassBuilder withMethod(Utf8Entry name,
+                                   Utf8Entry descriptor,
+                                   int flags,
+                                   Consumer<? super MethodBuilder> handler) {
+        return withMethod(new DirectMethodBuilder(constantPool, context, name, descriptor, flags, null)
+                                  .run(handler));
+    }
+
+    @Override
+    public ClassBuilder transformMethod(MethodModel method, MethodTransform transform) {
+        DirectMethodBuilder builder = new DirectMethodBuilder(constantPool, context, method.methodName(),
+                                                              method.methodType(),
+                                                              method.flags().flagsMask(),
+                                                              method);
+        builder.transform(method, transform);
+        return withMethod(builder);
+    }
+
+    // internal / for use by elements
+
+    public ClassBuilder withField(WritableElement<FieldModel> field) {
+        fields.add(field);
+        return this;
+    }
+
+    public ClassBuilder withMethod(WritableElement<MethodModel> method) {
+        methods.add(method);
+        return this;
+    }
+
+    void setSuperclass(ClassEntry superclassEntry) {
+        this.superclassEntry = superclassEntry;
+    }
+
+    void setInterfaces(List<ClassEntry> interfaces) {
+        this.interfaceEntries = interfaces;
+    }
+
+    void setVersion(int major, int minor) {
+        this.majorVersion = major;
+        this.minorVersion = minor;
+    }
+
+    void setFlags(int flags) {
+        this.flags = flags;
+    }
+
+    public void setSizeHint(int sizeHint) {
+        this.sizeHint = sizeHint;
+    }
+
+
+    public byte[] build() {
+
+        // The logic of this is very carefully ordered.  We want to avoid
+        // repeated buffer copyings, so we accumulate lists of writers which
+        // all get written later into the same buffer.  But, writing can often
+        // trigger CP / BSM insertions, so we cannot run the CP writer or
+        // BSM writers until everything else is written.
+
+        // Do this early because it might trigger CP activity
+        ClassEntry superclass = superclassEntry;
+        if (superclass != null)
+            superclass = AbstractPoolEntry.maybeClone(constantPool, superclass);
+        else if ((flags & ClassFile.ACC_MODULE) == 0 && !"java/lang/Object".equals(thisClassEntry.asInternalName()))
+            superclass = constantPool.classEntry(ConstantDescs.CD_Object);
+        List<ClassEntry> ies = new ArrayList<>(interfaceEntries.size());
+        for (ClassEntry ce : interfaceEntries)
+            ies.add(AbstractPoolEntry.maybeClone(constantPool, ce));
+
+        // We maintain two writers, and then we join them at the end
+        int size = sizeHint == 0 ? 256 : sizeHint;
+        BufWriter head = new BufWriterImpl(constantPool, context, size);
+        BufWriterImpl tail = new BufWriterImpl(constantPool, context, size, thisClassEntry, majorVersion);
+
+        // The tail consists of fields and methods, and attributes
+        // This should trigger all the CP/BSM mutation
+        tail.writeList(fields);
+        tail.writeList(methods);
+        int attributesOffset = tail.size();
+        attributes.writeTo(tail);
+
+        // Now we have to append the BSM, if there is one
+        boolean written = constantPool.writeBootstrapMethods(tail);
+        if (written) {
+            // Update attributes count
+            tail.patchInt(attributesOffset, 2, attributes.size() + 1);
+        }
+
+        // Now we can make the head
+        head.writeInt(ClassFile.MAGIC_NUMBER);
+        head.writeU2(minorVersion);
+        head.writeU2(majorVersion);
+        constantPool.writeTo(head);
+        head.writeU2(flags);
+        head.writeIndex(thisClassEntry);
+        head.writeIndexOrZero(superclass);
+        head.writeListIndices(ies);
+
+        // Join head and tail into an exact-size buffer
+        byte[] result = new byte[head.size() + tail.size()];
+        head.copyTo(result, 0);
+        tail.copyTo(result, head.size());
+        return result;
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/classfile/impl/DirectCodeBuilder$1.class b/tests/test_data/std/jdk/internal/classfile/impl/DirectCodeBuilder$1.class
new file mode 100644
index 0000000000000000000000000000000000000000..1a77df0db18bec0d03a1aa5fc7a9ee00af947031
GIT binary patch
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diff --git a/tests/test_data/std/jdk/internal/classfile/impl/DirectCodeBuilder$2.class b/tests/test_data/std/jdk/internal/classfile/impl/DirectCodeBuilder$2.class
new file mode 100644
index 0000000000000000000000000000000000000000..9aaf50621cc2366276bf71001ce6c58d12e9be99
GIT binary patch
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diff --git a/tests/test_data/std/jdk/internal/classfile/impl/DirectCodeBuilder$3.class b/tests/test_data/std/jdk/internal/classfile/impl/DirectCodeBuilder$3.class
new file mode 100644
index 0000000000000000000000000000000000000000..143e998e1438fc643d822afc769c77d91b0c47f8
GIT binary patch
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literal 0
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diff --git a/tests/test_data/std/jdk/internal/classfile/impl/DirectCodeBuilder$4.class b/tests/test_data/std/jdk/internal/classfile/impl/DirectCodeBuilder$4.class
new file mode 100644
index 0000000000000000000000000000000000000000..20f149ff731466fa96b121f507a0ceec7292abc9
GIT binary patch
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literal 0
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diff --git a/tests/test_data/std/jdk/internal/classfile/impl/DirectCodeBuilder$5.class b/tests/test_data/std/jdk/internal/classfile/impl/DirectCodeBuilder$5.class
new file mode 100644
index 0000000000000000000000000000000000000000..091ef3c059c5d073ecff2545ad835d39dd90bd53
GIT binary patch
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literal 0
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diff --git a/tests/test_data/std/jdk/internal/classfile/impl/DirectCodeBuilder$6.class b/tests/test_data/std/jdk/internal/classfile/impl/DirectCodeBuilder$6.class
new file mode 100644
index 0000000000000000000000000000000000000000..dc298d54ee768d340e0e05c6b955ce5d618d8f1e
GIT binary patch
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diff --git a/tests/test_data/std/jdk/internal/classfile/impl/DirectCodeBuilder$7.class b/tests/test_data/std/jdk/internal/classfile/impl/DirectCodeBuilder$7.class
new file mode 100644
index 0000000000000000000000000000000000000000..e0274935ccb6f1a13ca86c1860eb40d033fa1f39
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diff --git a/tests/test_data/std/jdk/internal/classfile/impl/DirectCodeBuilder$8.class b/tests/test_data/std/jdk/internal/classfile/impl/DirectCodeBuilder$8.class
new file mode 100644
index 0000000000000000000000000000000000000000..43fdce95b6464db075c4c38a54876614997ded05
GIT binary patch
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diff --git a/tests/test_data/std/jdk/internal/classfile/impl/DirectCodeBuilder$DedupLineNumberTableAttribute.class b/tests/test_data/std/jdk/internal/classfile/impl/DirectCodeBuilder$DedupLineNumberTableAttribute.class
new file mode 100644
index 0000000000000000000000000000000000000000..a23731c28627f867b37afaa924460ea9f97b59fc
GIT binary patch
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diff --git a/tests/test_data/std/jdk/internal/classfile/impl/DirectCodeBuilder$DeferredLabel.class b/tests/test_data/std/jdk/internal/classfile/impl/DirectCodeBuilder$DeferredLabel.class
new file mode 100644
index 0000000000000000000000000000000000000000..4b1831f89874d1ab9e0cfcfab76d4a29e8dde289
GIT binary patch
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diff --git a/tests/test_data/std/jdk/internal/classfile/impl/DirectCodeBuilder$LabelOverflowException.class b/tests/test_data/std/jdk/internal/classfile/impl/DirectCodeBuilder$LabelOverflowException.class
new file mode 100644
index 0000000000000000000000000000000000000000..4fc131574fe55d5529783b074d4044c4843a2372
GIT binary patch
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diff --git a/tests/test_data/std/jdk/internal/classfile/impl/DirectCodeBuilder.class b/tests/test_data/std/jdk/internal/classfile/impl/DirectCodeBuilder.class
new file mode 100644
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HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/classfile/impl/DirectCodeBuilder.java b/tests/test_data/std/jdk/internal/classfile/impl/DirectCodeBuilder.java
new file mode 100644
index 00000000..0b6549a8
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/classfile/impl/DirectCodeBuilder.java
@@ -0,0 +1,786 @@
+/*
+ * Copyright (c) 2022, 2024, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package jdk.internal.classfile.impl;
+
+import java.lang.constant.MethodTypeDesc;
+import java.util.ArrayList;
+import java.util.Comparator;
+import java.util.HashMap;
+import java.util.IdentityHashMap;
+import java.util.List;
+import java.util.Map;
+import java.util.function.Consumer;
+import java.util.function.Function;
+
+import java.lang.classfile.Attribute;
+import java.lang.classfile.Attributes;
+import java.lang.classfile.BufWriter;
+import java.lang.classfile.ClassFile;
+import java.lang.classfile.CodeBuilder;
+import java.lang.classfile.CodeElement;
+import java.lang.classfile.CodeModel;
+import java.lang.classfile.CustomAttribute;
+import java.lang.classfile.Instruction;
+import java.lang.classfile.Label;
+import java.lang.classfile.Opcode;
+import java.lang.classfile.TypeKind;
+import java.lang.classfile.instruction.SwitchCase;
+import java.lang.classfile.attribute.CodeAttribute;
+import java.lang.classfile.attribute.LineNumberTableAttribute;
+import java.lang.classfile.attribute.StackMapTableAttribute;
+import java.lang.classfile.constantpool.ClassEntry;
+import java.lang.classfile.constantpool.ConstantPoolBuilder;
+import java.lang.classfile.constantpool.DoubleEntry;
+import java.lang.classfile.constantpool.FieldRefEntry;
+import java.lang.classfile.constantpool.InterfaceMethodRefEntry;
+import java.lang.classfile.constantpool.InvokeDynamicEntry;
+import java.lang.classfile.constantpool.LoadableConstantEntry;
+import java.lang.classfile.constantpool.LongEntry;
+import java.lang.classfile.constantpool.MemberRefEntry;
+import java.lang.classfile.instruction.CharacterRange;
+import java.lang.classfile.instruction.ExceptionCatch;
+import java.lang.classfile.instruction.LocalVariable;
+import java.lang.classfile.instruction.LocalVariableType;
+
+import static java.lang.classfile.Opcode.GOTO;
+import static java.lang.classfile.Opcode.GOTO_W;
+import static java.lang.classfile.Opcode.IINC;
+import static java.lang.classfile.Opcode.IINC_W;
+import static java.lang.classfile.Opcode.JSR;
+import static java.lang.classfile.Opcode.JSR_W;
+import static java.lang.classfile.Opcode.LDC2_W;
+import static java.lang.classfile.Opcode.LDC_W;
+
+public final class DirectCodeBuilder
+        extends AbstractDirectBuilder<CodeModel>
+        implements TerminalCodeBuilder {
+    private final List<CharacterRange> characterRanges = new ArrayList<>();
+    final List<AbstractPseudoInstruction.ExceptionCatchImpl> handlers = new ArrayList<>();
+    private final List<LocalVariable> localVariables = new ArrayList<>();
+    private final List<LocalVariableType> localVariableTypes = new ArrayList<>();
+    private final boolean transformFwdJumps, transformBackJumps;
+    private final Label startLabel, endLabel;
+    final MethodInfo methodInfo;
+    final BufWriter bytecodesBufWriter;
+    private CodeAttribute mruParent;
+    private int[] mruParentTable;
+    private Map<CodeAttribute, int[]> parentMap;
+    private DedupLineNumberTableAttribute lineNumberWriter;
+    private int topLocal;
+
+    List<DeferredLabel> deferredLabels;
+
+    /* Locals management
+       lazily computed maxLocal = -1
+       first time: derive count from methodType descriptor (for new methods) & ACC_STATIC,
+       or model maxLocals (for transformation)
+       block builders inherit parent count
+       allocLocal(TypeKind) bumps by nSlots
+     */
+
+    public static Attribute<CodeAttribute> build(MethodInfo methodInfo,
+                                                 Consumer<? super CodeBuilder> handler,
+                                                 SplitConstantPool constantPool,
+                                                 ClassFileImpl context,
+                                                 CodeModel original) {
+        DirectCodeBuilder cb;
+        try {
+            handler.accept(cb = new DirectCodeBuilder(methodInfo, constantPool, context, original, false));
+            cb.buildContent();
+        } catch (LabelOverflowException loe) {
+            if (context.shortJumpsOption() == ClassFile.ShortJumpsOption.FIX_SHORT_JUMPS) {
+                handler.accept(cb = new DirectCodeBuilder(methodInfo, constantPool, context, original, true));
+                cb.buildContent();
+            }
+            else
+                throw loe;
+        }
+        return cb.content;
+    }
+
+    private DirectCodeBuilder(MethodInfo methodInfo,
+                              SplitConstantPool constantPool,
+                              ClassFileImpl context,
+                              CodeModel original,
+                              boolean transformFwdJumps) {
+        super(constantPool, context);
+        setOriginal(original);
+        this.methodInfo = methodInfo;
+        this.transformFwdJumps = transformFwdJumps;
+        this.transformBackJumps = context.shortJumpsOption() == ClassFile.ShortJumpsOption.FIX_SHORT_JUMPS;
+        bytecodesBufWriter = (original instanceof CodeImpl cai) ? new BufWriterImpl(constantPool, context, cai.codeLength())
+                                                               : new BufWriterImpl(constantPool, context);
+        this.startLabel = new LabelImpl(this, 0);
+        this.endLabel = new LabelImpl(this, -1);
+        this.topLocal = Util.maxLocals(methodInfo.methodFlags(), methodInfo.methodTypeSymbol());
+        if (original != null)
+            this.topLocal = Math.max(this.topLocal, original.maxLocals());
+    }
+
+    @Override
+    public CodeBuilder with(CodeElement element) {
+        if (element instanceof AbstractElement ae) {
+            ae.writeTo(this);
+        } else {
+            writeAttribute((CustomAttribute)element);
+        }
+        return this;
+    }
+
+    @Override
+    public Label newLabel() {
+        return new LabelImpl(this, -1);
+    }
+
+    @Override
+    public Label startLabel() {
+        return startLabel;
+    }
+
+    @Override
+    public Label endLabel() {
+        return endLabel;
+    }
+
+    @Override
+    public int receiverSlot() {
+        return methodInfo.receiverSlot();
+    }
+
+    @Override
+    public int parameterSlot(int paramNo) {
+        return methodInfo.parameterSlot(paramNo);
+    }
+
+    public int curTopLocal() {
+        return topLocal;
+    }
+
+    @Override
+    public int allocateLocal(TypeKind typeKind) {
+        int retVal = topLocal;
+        topLocal += typeKind.slotSize();
+        return retVal;
+    }
+
+    public int curPc() {
+        return bytecodesBufWriter.size();
+    }
+
+    public MethodInfo methodInfo() {
+        return methodInfo;
+    }
+
+    private Attribute<CodeAttribute> content = null;
+
+    private void writeExceptionHandlers(BufWriter buf) {
+        int pos = buf.size();
+        int handlersSize = handlers.size();
+        buf.writeU2(handlersSize);
+        for (AbstractPseudoInstruction.ExceptionCatchImpl h : handlers) {
+            int startPc = labelToBci(h.tryStart());
+            int endPc = labelToBci(h.tryEnd());
+            int handlerPc = labelToBci(h.handler());
+            if (startPc == -1 || endPc == -1 || handlerPc == -1) {
+                if (context.deadLabelsOption() == ClassFile.DeadLabelsOption.DROP_DEAD_LABELS) {
+                    handlersSize--;
+                } else {
+                    throw new IllegalArgumentException("Unbound label in exception handler");
+                }
+            } else {
+                buf.writeU2(startPc);
+                buf.writeU2(endPc);
+                buf.writeU2(handlerPc);
+                buf.writeIndexOrZero(h.catchTypeEntry());
+                handlersSize++;
+            }
+        }
+        if (handlersSize < handlers.size())
+            buf.patchInt(pos, 2, handlersSize);
+    }
+
+    private void buildContent() {
+        if (content != null) return;
+        setLabelTarget(endLabel);
+
+        // Backfill branches for which Label didn't have position yet
+        processDeferredLabels();
+
+        if (context.debugElementsOption() == ClassFile.DebugElementsOption.PASS_DEBUG) {
+            if (!characterRanges.isEmpty()) {
+                Attribute<?> a = new UnboundAttribute.AdHocAttribute<>(Attributes.characterRangeTable()) {
+
+                    @Override
+                    public void writeBody(BufWriter b) {
+                        int pos = b.size();
+                        int crSize = characterRanges.size();
+                        b.writeU2(crSize);
+                        for (CharacterRange cr : characterRanges) {
+                            var start = labelToBci(cr.startScope());
+                            var end = labelToBci(cr.endScope());
+                            if (start == -1 || end == -1) {
+                                if (context.deadLabelsOption() == ClassFile.DeadLabelsOption.DROP_DEAD_LABELS) {
+                                    crSize--;
+                                } else {
+                                    throw new IllegalArgumentException("Unbound label in character range");
+                                }
+                            } else {
+                                b.writeU2(start);
+                                b.writeU2(end - 1);
+                                b.writeInt(cr.characterRangeStart());
+                                b.writeInt(cr.characterRangeEnd());
+                                b.writeU2(cr.flags());
+                            }
+                        }
+                        if (crSize < characterRanges.size())
+                            b.patchInt(pos, 2, crSize);
+                    }
+                };
+                attributes.withAttribute(a);
+            }
+
+            if (!localVariables.isEmpty()) {
+                Attribute<?> a = new UnboundAttribute.AdHocAttribute<>(Attributes.localVariableTable()) {
+                    @Override
+                    public void writeBody(BufWriter b) {
+                        int pos = b.size();
+                        int lvSize = localVariables.size();
+                        b.writeU2(lvSize);
+                        for (LocalVariable l : localVariables) {
+                            if (!l.writeTo(b)) {
+                                if (context.deadLabelsOption() == ClassFile.DeadLabelsOption.DROP_DEAD_LABELS) {
+                                    lvSize--;
+                                } else {
+                                    throw new IllegalArgumentException("Unbound label in local variable type");
+                                }
+                            }
+                        }
+                        if (lvSize < localVariables.size())
+                            b.patchInt(pos, 2, lvSize);
+                    }
+                };
+                attributes.withAttribute(a);
+            }
+
+            if (!localVariableTypes.isEmpty()) {
+                Attribute<?> a = new UnboundAttribute.AdHocAttribute<>(Attributes.localVariableTypeTable()) {
+                    @Override
+                    public void writeBody(BufWriter b) {
+                        int pos = b.size();
+                        int lvtSize = localVariableTypes.size();
+                        b.writeU2(localVariableTypes.size());
+                        for (LocalVariableType l : localVariableTypes) {
+                            if (!l.writeTo(b)) {
+                                if (context.deadLabelsOption() == ClassFile.DeadLabelsOption.DROP_DEAD_LABELS) {
+                                    lvtSize--;
+                                } else {
+                                    throw new IllegalArgumentException("Unbound label in local variable type");
+                                }
+                            }
+                        }
+                        if (lvtSize < localVariableTypes.size())
+                            b.patchInt(pos, 2, lvtSize);
+                    }
+                };
+                attributes.withAttribute(a);
+            }
+        }
+
+        if (lineNumberWriter != null) {
+            attributes.withAttribute(lineNumberWriter);
+        }
+
+        content = new UnboundAttribute.AdHocAttribute<>(Attributes.code()) {
+
+            private void writeCounters(boolean codeMatch, BufWriterImpl buf) {
+                if (codeMatch) {
+                    buf.writeU2(original.maxStack());
+                    buf.writeU2(original.maxLocals());
+                } else {
+                    StackCounter cntr = StackCounter.of(DirectCodeBuilder.this, buf);
+                    buf.writeU2(cntr.maxStack());
+                    buf.writeU2(cntr.maxLocals());
+                }
+            }
+
+            private void generateStackMaps(BufWriterImpl buf) throws IllegalArgumentException {
+                //new instance of generator immediately calculates maxStack, maxLocals, all frames,
+                // patches dead bytecode blocks and removes them from exception table
+                StackMapGenerator gen = StackMapGenerator.of(DirectCodeBuilder.this, buf);
+                attributes.withAttribute(gen.stackMapTableAttribute());
+                buf.writeU2(gen.maxStack());
+                buf.writeU2(gen.maxLocals());
+            }
+
+            private void tryGenerateStackMaps(boolean codeMatch, BufWriterImpl buf) {
+                if (buf.getMajorVersion() >= ClassFile.JAVA_6_VERSION) {
+                    try {
+                        generateStackMaps(buf);
+                    } catch (IllegalArgumentException e) {
+                        //failover following JVMS-4.10
+                        if (buf.getMajorVersion() == ClassFile.JAVA_6_VERSION) {
+                            writeCounters(codeMatch, buf);
+                        } else {
+                            throw e;
+                        }
+                    }
+                } else {
+                    writeCounters(codeMatch, buf);
+                }
+            }
+
+            @Override
+            public void writeBody(BufWriter b) {
+                BufWriterImpl buf = (BufWriterImpl) b;
+                buf.setLabelContext(DirectCodeBuilder.this);
+
+                int codeLength = curPc();
+                if (codeLength == 0 || codeLength >= 65536) {
+                    throw new IllegalArgumentException(String.format(
+                            "Code length %d is outside the allowed range in %s%s",
+                            codeLength,
+                            methodInfo.methodName().stringValue(),
+                            methodInfo.methodTypeSymbol().displayDescriptor()));
+                }
+
+                if (codeAndExceptionsMatch(codeLength)) {
+                    switch (context.stackMapsOption()) {
+                        case STACK_MAPS_WHEN_REQUIRED -> {
+                            attributes.withAttribute(original.findAttribute(Attributes.stackMapTable()).orElse(null));
+                            writeCounters(true, buf);
+                        }
+                        case GENERATE_STACK_MAPS ->
+                            generateStackMaps(buf);
+                        case DROP_STACK_MAPS ->
+                            writeCounters(true, buf);
+                    }
+                } else {
+                    switch (context.stackMapsOption()) {
+                        case STACK_MAPS_WHEN_REQUIRED ->
+                            tryGenerateStackMaps(false, buf);
+                        case GENERATE_STACK_MAPS ->
+                            generateStackMaps(buf);
+                        case DROP_STACK_MAPS ->
+                            writeCounters(false, buf);
+                    }
+                }
+
+                buf.writeInt(codeLength);
+                buf.writeBytes(bytecodesBufWriter);
+                writeExceptionHandlers(b);
+                attributes.writeTo(b);
+                buf.setLabelContext(null);
+            }
+        };
+    }
+
+    private static class DedupLineNumberTableAttribute extends UnboundAttribute.AdHocAttribute<LineNumberTableAttribute> {
+        private final BufWriterImpl buf;
+        private int lastPc, lastLine, writtenLine;
+
+        public DedupLineNumberTableAttribute(ConstantPoolBuilder constantPool, ClassFileImpl context) {
+            super(Attributes.lineNumberTable());
+            buf = new BufWriterImpl(constantPool, context);
+            lastPc = -1;
+            writtenLine = -1;
+        }
+
+        private void push() {
+            //subsequent identical line numbers are skipped
+            if (lastPc >= 0 && lastLine != writtenLine) {
+                buf.writeU2(lastPc);
+                buf.writeU2(lastLine);
+                writtenLine = lastLine;
+            }
+        }
+
+        //writes are expected ordered by pc in ascending sequence
+        public void writeLineNumber(int pc, int lineNo) {
+            //for each pc only the latest line number is written
+            if (lastPc != pc && lastLine != lineNo) {
+                push();
+                lastPc = pc;
+            }
+            lastLine = lineNo;
+        }
+
+        @Override
+        public void writeBody(BufWriter b) {
+            throw new UnsupportedOperationException();
+        }
+
+        @Override
+        public void writeTo(BufWriter b) {
+            b.writeIndex(b.constantPool().utf8Entry(Attributes.NAME_LINE_NUMBER_TABLE));
+            push();
+            b.writeInt(buf.size() + 2);
+            b.writeU2(buf.size() / 4);
+            b.writeBytes(buf);
+        }
+    }
+
+    private boolean codeAndExceptionsMatch(int codeLength) {
+        boolean codeAttributesMatch;
+        if (original instanceof CodeImpl cai && canWriteDirect(cai.constantPool())) {
+            codeAttributesMatch = cai.codeLength == curPc()
+                                  && cai.compareCodeBytes(bytecodesBufWriter, 0, codeLength);
+            if (codeAttributesMatch) {
+                BufWriter bw = new BufWriterImpl(constantPool, context);
+                writeExceptionHandlers(bw);
+                codeAttributesMatch = cai.classReader.compare(bw, 0, cai.exceptionHandlerPos, bw.size());
+            }
+        }
+        else
+            codeAttributesMatch = false;
+        return codeAttributesMatch;
+    }
+
+    // Writing support
+
+    private record DeferredLabel(int labelPc, int size, int instructionPc, Label label) { }
+
+    private void writeLabelOffset(int nBytes, int instructionPc, Label label) {
+        int targetBci = labelToBci(label);
+        if (targetBci == -1) {
+            int pc = curPc();
+            bytecodesBufWriter.writeIntBytes(nBytes, 0);
+            if (deferredLabels == null)
+                deferredLabels = new ArrayList<>();
+            deferredLabels.add(new DeferredLabel(pc, nBytes, instructionPc, label));
+        }
+        else {
+            int branchOffset = targetBci - instructionPc;
+            if (nBytes == 2 && (short)branchOffset != branchOffset) throw new LabelOverflowException();
+            bytecodesBufWriter.writeIntBytes(nBytes, branchOffset);
+        }
+    }
+
+    private void processDeferredLabels() {
+        if (deferredLabels != null) {
+            for (DeferredLabel dl : deferredLabels) {
+                int branchOffset = labelToBci(dl.label) - dl.instructionPc;
+                if (dl.size == 2 && (short)branchOffset != branchOffset) throw new LabelOverflowException();
+                bytecodesBufWriter.patchInt(dl.labelPc, dl.size, branchOffset);
+            }
+        }
+    }
+
+    // Instruction writing
+
+    public void writeBytecode(Opcode opcode) {
+        if (opcode.isWide())
+            bytecodesBufWriter.writeU1(ClassFile.WIDE);
+        bytecodesBufWriter.writeU1(opcode.bytecode() & 0xFF);
+    }
+
+    public void writeLocalVar(Opcode opcode, int localVar) {
+        writeBytecode(opcode);
+        switch (opcode.sizeIfFixed()) {
+            case 1 -> { }
+            case 2 -> bytecodesBufWriter.writeU1(localVar);
+            case 4 -> bytecodesBufWriter.writeU2(localVar);
+            default -> throw new IllegalArgumentException("Unexpected instruction size: " + opcode);
+        }
+    }
+
+    public void writeIncrement(int slot, int val) {
+        Opcode opcode = (slot < 256 && val < 128 && val > -127)
+                        ? IINC
+                        : IINC_W;
+        writeBytecode(opcode);
+        if (opcode.isWide()) {
+            bytecodesBufWriter.writeU2(slot);
+            bytecodesBufWriter.writeU2(val);
+        } else {
+            bytecodesBufWriter.writeU1(slot);
+            bytecodesBufWriter.writeU1(val);
+        }
+    }
+
+    public void writeBranch(Opcode op, Label target) {
+        int instructionPc = curPc();
+        int targetBci = labelToBci(target);
+        //transform short-opcode forward jumps if enforced, and backward jumps if enabled and overflowing
+        if (op.sizeIfFixed() == 3 && (targetBci == -1
+                                      ? transformFwdJumps
+                                      : (transformBackJumps
+                                         && targetBci - instructionPc < Short.MIN_VALUE))) {
+            if (op == GOTO) {
+                writeBytecode(GOTO_W);
+                writeLabelOffset(4, instructionPc, target);
+            } else if (op == JSR) {
+                writeBytecode(JSR_W);
+                writeLabelOffset(4, instructionPc, target);
+            } else {
+                writeBytecode(BytecodeHelpers.reverseBranchOpcode(op));
+                Label bypassJump = newLabel();
+                writeLabelOffset(2, instructionPc, bypassJump);
+                writeBytecode(GOTO_W);
+                writeLabelOffset(4, instructionPc + 3, target);
+                labelBinding(bypassJump);
+            }
+        } else {
+            writeBytecode(op);
+            writeLabelOffset(op.sizeIfFixed() == 3 ? 2 : 4, instructionPc, target);
+        }
+    }
+
+    public void writeLookupSwitch(Label defaultTarget, List<SwitchCase> cases) {
+        int instructionPc = curPc();
+        writeBytecode(Opcode.LOOKUPSWITCH);
+        int pad = 4 - (curPc() % 4);
+        if (pad != 4)
+            bytecodesBufWriter.writeIntBytes(pad, 0);
+        writeLabelOffset(4, instructionPc, defaultTarget);
+        bytecodesBufWriter.writeInt(cases.size());
+        cases = new ArrayList<>(cases);
+        cases.sort(new Comparator<SwitchCase>() {
+            @Override
+            public int compare(SwitchCase c1, SwitchCase c2) {
+                return Integer.compare(c1.caseValue(), c2.caseValue());
+            }
+        });
+        for (var c : cases) {
+            bytecodesBufWriter.writeInt(c.caseValue());
+            writeLabelOffset(4, instructionPc, c.target());
+        }
+    }
+
+    public void writeTableSwitch(int low, int high, Label defaultTarget, List<SwitchCase> cases) {
+        int instructionPc = curPc();
+        writeBytecode(Opcode.TABLESWITCH);
+        int pad = 4 - (curPc() % 4);
+        if (pad != 4)
+            bytecodesBufWriter.writeIntBytes(pad, 0);
+        writeLabelOffset(4, instructionPc, defaultTarget);
+        bytecodesBufWriter.writeInt(low);
+        bytecodesBufWriter.writeInt(high);
+        var caseMap = new HashMap<Integer, Label>(cases.size());
+        for (var c : cases) {
+            caseMap.put(c.caseValue(), c.target());
+        }
+        for (long l = low; l<=high; l++) {
+            writeLabelOffset(4, instructionPc, caseMap.getOrDefault((int)l, defaultTarget));
+        }
+    }
+
+    public void writeFieldAccess(Opcode opcode, FieldRefEntry ref) {
+        writeBytecode(opcode);
+        bytecodesBufWriter.writeIndex(ref);
+    }
+
+    public void writeInvokeNormal(Opcode opcode, MemberRefEntry ref) {
+        writeBytecode(opcode);
+        bytecodesBufWriter.writeIndex(ref);
+    }
+
+    public void writeInvokeInterface(Opcode opcode,
+                                     InterfaceMethodRefEntry ref,
+                                     int count) {
+        writeBytecode(opcode);
+        bytecodesBufWriter.writeIndex(ref);
+        bytecodesBufWriter.writeU1(count);
+        bytecodesBufWriter.writeU1(0);
+    }
+
+    public void writeInvokeDynamic(InvokeDynamicEntry ref) {
+        writeBytecode(Opcode.INVOKEDYNAMIC);
+        bytecodesBufWriter.writeIndex(ref);
+        bytecodesBufWriter.writeU2(0);
+    }
+
+    public void writeNewObject(ClassEntry type) {
+        writeBytecode(Opcode.NEW);
+        bytecodesBufWriter.writeIndex(type);
+    }
+
+    public void writeNewPrimitiveArray(int newArrayCode) {
+        writeBytecode(Opcode.NEWARRAY);
+        bytecodesBufWriter.writeU1(newArrayCode);
+    }
+
+    public void writeNewReferenceArray(ClassEntry type) {
+        writeBytecode(Opcode.ANEWARRAY);
+        bytecodesBufWriter.writeIndex(type);
+    }
+
+    public void writeNewMultidimensionalArray(int dimensions, ClassEntry type) {
+        writeBytecode(Opcode.MULTIANEWARRAY);
+        bytecodesBufWriter.writeIndex(type);
+        bytecodesBufWriter.writeU1(dimensions);
+    }
+
+    public void writeTypeCheck(Opcode opcode, ClassEntry type) {
+        writeBytecode(opcode);
+        bytecodesBufWriter.writeIndex(type);
+    }
+
+    public void writeArgumentConstant(Opcode opcode, int value) {
+        writeBytecode(opcode);
+        if (opcode.sizeIfFixed() == 3) {
+            bytecodesBufWriter.writeU2(value);
+        } else {
+            bytecodesBufWriter.writeU1(value);
+        }
+    }
+
+    public void writeLoadConstant(Opcode opcode, LoadableConstantEntry value) {
+        // Make sure Long and Double have LDC2_W and
+        // rewrite to _W if index is > 256
+        int index = AbstractPoolEntry.maybeClone(constantPool, value).index();
+        Opcode op = opcode;
+        if (value instanceof LongEntry || value instanceof DoubleEntry) {
+            op = LDC2_W;
+        } else if (index >= 256)
+            op = LDC_W;
+
+        writeBytecode(op);
+        if (op.sizeIfFixed() == 3) {
+            bytecodesBufWriter.writeU2(index);
+        } else {
+            bytecodesBufWriter.writeU1(index);
+        }
+    }
+
+    @Override
+    public Label getLabel(int bci) {
+        throw new UnsupportedOperationException("Lookup by BCI not supported by CodeBuilder");
+    }
+
+    @Override
+    public int labelToBci(Label label) {
+        LabelImpl lab = (LabelImpl) label;
+        LabelContext context = lab.labelContext();
+        if (context == this) {
+            return lab.getBCI();
+        }
+        else if (context == mruParent) {
+            return mruParentTable[lab.getBCI()] - 1;
+        }
+        else if (context instanceof CodeAttribute parent) {
+            if (parentMap == null)
+                parentMap = new IdentityHashMap<>();
+            //critical JDK bootstrap path, cannot use lambda here
+            int[] table = parentMap.computeIfAbsent(parent, new Function<CodeAttribute, int[]>() {
+                @Override
+                public int[] apply(CodeAttribute x) {
+                    return new int[parent.codeLength() + 1];
+                }
+            });
+
+            mruParent = parent;
+            mruParentTable = table;
+            return mruParentTable[lab.getBCI()] - 1;
+        }
+        else if (context instanceof BufferedCodeBuilder) {
+            // Hijack the label
+            return lab.getBCI();
+        }
+        else {
+            throw new IllegalStateException(String.format("Unexpected label context %s in =%s", context, this));
+        }
+    }
+
+    public void setLineNumber(int lineNo) {
+        if (lineNumberWriter == null)
+            lineNumberWriter = new DedupLineNumberTableAttribute(constantPool, context);
+        lineNumberWriter.writeLineNumber(curPc(), lineNo);
+    }
+
+    public void setLabelTarget(Label label) {
+        setLabelTarget(label, curPc());
+    }
+
+    @Override
+    public void setLabelTarget(Label label, int bci) {
+        LabelImpl lab = (LabelImpl) label;
+        LabelContext context = lab.labelContext();
+
+        if (context == this) {
+            if (lab.getBCI() != -1)
+                throw new IllegalArgumentException("Setting label target for already-set label");
+            lab.setBCI(bci);
+        }
+        else if (context == mruParent) {
+            mruParentTable[lab.getBCI()] = bci + 1;
+        }
+        else if (context instanceof CodeAttribute parent) {
+            if (parentMap == null)
+                parentMap = new IdentityHashMap<>();
+            int[] table = parentMap.computeIfAbsent(parent, new Function<CodeAttribute, int[]>() {
+                @Override
+                public int[] apply(CodeAttribute x) {
+                    return new int[parent.codeLength() + 1];
+                }
+            });
+
+            mruParent = parent;
+            mruParentTable = table;
+            mruParentTable[lab.getBCI()] = bci + 1;
+        }
+        else if (context instanceof BufferedCodeBuilder) {
+            // Hijack the label
+            lab.setBCI(bci);
+        }
+        else {
+            throw new IllegalStateException(String.format("Unexpected label context %s in =%s", context, this));
+        }
+    }
+
+    public void addCharacterRange(CharacterRange element) {
+        characterRanges.add(element);
+    }
+
+    public void addHandler(ExceptionCatch element) {
+        AbstractPseudoInstruction.ExceptionCatchImpl el = (AbstractPseudoInstruction.ExceptionCatchImpl) element;
+        ClassEntry type = el.catchTypeEntry();
+        if (type != null && !constantPool.canWriteDirect(type.constantPool()))
+            el = new AbstractPseudoInstruction.ExceptionCatchImpl(element.handler(), element.tryStart(), element.tryEnd(), AbstractPoolEntry.maybeClone(constantPool, type));
+        handlers.add(el);
+    }
+
+    public void addLocalVariable(LocalVariable element) {
+        localVariables.add(element);
+    }
+
+    public void addLocalVariableType(LocalVariableType element) {
+        localVariableTypes.add(element);
+    }
+
+    @Override
+    public String toString() {
+        return String.format("CodeBuilder[id=%d]", System.identityHashCode(this));
+    }
+
+    //ToDo: consolidate and open all exceptions
+    private static final class LabelOverflowException extends IllegalArgumentException {
+
+        private static final long serialVersionUID = 1L;
+
+        public LabelOverflowException() {
+            super("Label target offset overflow");
+        }
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/classfile/impl/DirectFieldBuilder.class b/tests/test_data/std/jdk/internal/classfile/impl/DirectFieldBuilder.class
new file mode 100644
index 0000000000000000000000000000000000000000..50da2961939a83ab9ea7cc20ac93c699cd43fd53
GIT binary patch
literal 3453
zcmbtWU3U{z6x}yzGfg@`sil0jR8U$br2&e7rdHZOrP>d)1^hytB$IaNWYRUc5%>}Q
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z;L*fVlKR@VW6M&*ZA#OX_ZkhSm?&OS;0pv_BzE!QgB<#h)sWNC4_#m?2`cb#!M2=g
z<Ys@<lB=G*VKXv;WAxSh&MY{lyHQvzKW0G0$P(kQjw2Wl=yA=uB{10~*WsfQhOx~s
z3ioC0<{ejh&x%TaP{$j-e${GL)W$I#!#FO`TXW2frhr(~a8e+j6hNEmJC0SiT$#fO
zoYrv$BLdnJ&z9DDLtr|Y@4X~2LJemH&UZrZgj8xZWurbPrDvC0(o%H4spA~Z3mo<#
zqhA8&y4mZPh$INqkGF9_!?=zKm9Eo1WJ}skq1JLM(r&l~RST`UUqWW3Vr|QQ7|3gw
z)Nu(@0wZy5&bMk06#*=~fQkE8nX8FKg=pZijw|3s&i8oHty)h73i00V%Au;qAcsK}
zT+{ImuG5g&CWM*0lvuD)^miMoF^W0d#Jd{aQ+X>Ml<zi5pt~=_QS^R8r0~9uS$rU%
zw}Vk}u#G1!Cc3(}6*bHWjKvY|cTrS_eJJU;jXUK0i7ht;7UIe6)+*AOsMk8x(%qg#
z4Ic_zPHKsD%d4y2?N-yUxKA~!8Zpa`6*?~PcXG4rWh9Zn(yqfPHoSI5UO6KEx2zxk
za-(XgLy>7HaVc<Q$#$)kR=sR_>nd)6!KFsUbRL+Vt-iy}9=U0=kS`|&7jtm1i4s-z
z(#Q5B1JZgbS^9~(ySZdU^4T{1?`uSd^;j%vT|@|^OsX8vpW*ctmIPZ;vx4K5?Y2Kc
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z#ToK+P(RL+p6r^v;hM7Lky@D;<?C7e4^;H=(q0Iz&2+g{6F3{|dgoXaxT(&*nDBP>
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zmH%w=Bo%jZQX__=S5D2>0Ok$3)@XSZOHFD5$M+WWlmg<d+{Z~Xg$3M28iQ)Y;s83R
zMkT&eYC_^$1IHwM#OKHS`ks;*zDJDw<O>MnWbY0%<I-~+GEVk9$5A8w978|*>Pvi{
z@`bPRISn1xaFjRraa`x^djre-KN}ds3Rd|=v)s8yD7E?opVA4nQjVql)f!hl{%Rff
z>6TFUUg(-fX(ct9{{ts}z(D?YoLHVTc5v!P^c(yd-NBgg6D876z76`8iu7v+L&QCU
zTfR?Y{I8Rm2YBe?k4D~&;xl|sv@fXLgVd0s=1Y7<DMig1-^$-?-gt?(Qs{zG6Fumv
zMrT#n!+~IAIEzR4n#R82Kb>zH;m)^QnOvt(=Cgt+ek-6^?kIa1<Mb}F1C&KSTOE{4
zgp%<y%3)UxKcTIy(AId~_yt2RaWMt8I`k5SV0F}AacerigBzX94ig46onz*Pn6pvl
z>jE>@0UnQl$5Dj^F)&BhYawufZxv{-@d7g{DJefG8GrMFZzf=(H!wrx+t{F#VqiM-
eI;+xpYX|d52C|_an+lDPEbdgutBuD#^47o8V8gEf

literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/classfile/impl/DirectFieldBuilder.java b/tests/test_data/std/jdk/internal/classfile/impl/DirectFieldBuilder.java
new file mode 100644
index 00000000..7bdab531
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/classfile/impl/DirectFieldBuilder.java
@@ -0,0 +1,83 @@
+/*
+ * Copyright (c) 2022, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package jdk.internal.classfile.impl;
+
+import java.util.function.Consumer;
+
+import java.lang.classfile.BufWriter;
+import java.lang.classfile.CustomAttribute;
+import java.lang.classfile.FieldBuilder;
+import java.lang.classfile.FieldElement;
+import java.lang.classfile.FieldModel;
+import java.lang.classfile.WritableElement;
+import java.lang.classfile.constantpool.Utf8Entry;
+
+public final class DirectFieldBuilder
+        extends AbstractDirectBuilder<FieldModel>
+        implements TerminalFieldBuilder, WritableElement<FieldModel> {
+    private final Utf8Entry name;
+    private final Utf8Entry desc;
+    private int flags;
+
+    public DirectFieldBuilder(SplitConstantPool constantPool,
+                              ClassFileImpl context,
+                              Utf8Entry name,
+                              Utf8Entry type,
+                              FieldModel original) {
+        super(constantPool, context);
+        setOriginal(original);
+        this.name = name;
+        this.desc = type;
+        this.flags = 0;
+    }
+
+    @Override
+    public FieldBuilder with(FieldElement element) {
+        if (element instanceof AbstractElement ae) {
+            ae.writeTo(this);
+        } else {
+            writeAttribute((CustomAttribute)element);
+        }
+        return this;
+    }
+
+    public DirectFieldBuilder run(Consumer<? super FieldBuilder> handler) {
+        handler.accept(this);
+        return this;
+    }
+
+    void setFlags(int flags) {
+        this.flags = flags;
+    }
+
+    @Override
+    public void writeTo(BufWriter buf) {
+        buf.writeU2(flags);
+        buf.writeIndex(name);
+        buf.writeIndex(desc);
+        attributes.writeTo(buf);
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/classfile/impl/DirectMethodBuilder$1.class b/tests/test_data/std/jdk/internal/classfile/impl/DirectMethodBuilder$1.class
new file mode 100644
index 0000000000000000000000000000000000000000..486bd80821696263cb7de26598bdfa5f3dadba88
GIT binary patch
literal 1546
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z`e1zaM;Xs_D_xTALz`@8_slux`_7#2%%8tMe*tLVSrIwp4HQg_V3eVD-2Pxo6^TG`
z*LGYUhKJG>w)9S1`=tzo6YYrT$Zx-hrP~%kxyCSd%H6W#w*|x8_Ax)@w#!u~72Ke`
z9eUilMjJCxM2TTSheZKb;h`UR3=5gD2mhVwC775naK*$VEC#EO_O5kI+!#hTq>|Al
zLw>Q+9LE%{8Mtm@8Z*SM@7}LWlj{}3P)zaJTg)Kjo%pe8Z@Iz~Dyk25(g*j74z5qV
z(kxN&vnFoh7SZI6BTk5KISb{2RlU+QaEIY`mwg;b*FKDu6G>m$4PS+^Cjy33$}?Q+
zGMHcVYH(q+ovw+YpbwB?a$72~8+$Dg9PpM)mZ@#u;ck-$Qh)c1h3H6z4C}*^E!XOF
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zPtPT>3~t*-%6*_B>zf2z+V|tY5n4_Rvjc{3RV#y9u%#T=52flPr5dmq>>*WQqJ}3l
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/classfile/impl/DirectMethodBuilder.class b/tests/test_data/std/jdk/internal/classfile/impl/DirectMethodBuilder.class
new file mode 100644
index 0000000000000000000000000000000000000000..195c799251241c342f2635708c7d51aaccbefadb
GIT binary patch
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/classfile/impl/DirectMethodBuilder.java b/tests/test_data/std/jdk/internal/classfile/impl/DirectMethodBuilder.java
new file mode 100644
index 00000000..50daf243
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/classfile/impl/DirectMethodBuilder.java
@@ -0,0 +1,158 @@
+/*
+ * Copyright (c) 2022, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package jdk.internal.classfile.impl;
+
+import java.lang.constant.MethodTypeDesc;
+import java.util.function.Consumer;
+
+import java.lang.classfile.BufWriter;
+import java.lang.classfile.ClassFile;
+import java.lang.classfile.CodeBuilder;
+import java.lang.classfile.CodeModel;
+import java.lang.classfile.CodeTransform;
+import java.lang.classfile.CustomAttribute;
+import java.lang.classfile.MethodBuilder;
+import java.lang.classfile.MethodElement;
+import java.lang.classfile.MethodModel;
+import java.lang.classfile.WritableElement;
+import java.lang.classfile.constantpool.Utf8Entry;
+
+public final class DirectMethodBuilder
+        extends AbstractDirectBuilder<MethodModel>
+        implements TerminalMethodBuilder, WritableElement<MethodModel>, MethodInfo {
+
+    final Utf8Entry name;
+    final Utf8Entry desc;
+    int flags;
+    int[] parameterSlots;
+    MethodTypeDesc mDesc;
+
+    public DirectMethodBuilder(SplitConstantPool constantPool,
+                               ClassFileImpl context,
+                               Utf8Entry nameInfo,
+                               Utf8Entry typeInfo,
+                               int flags,
+                               MethodModel original) {
+        super(constantPool, context);
+        setOriginal(original);
+        this.name = nameInfo;
+        this.desc = typeInfo;
+        this.flags = flags;
+    }
+
+    void setFlags(int flags) {
+        boolean wasStatic = (this.flags & ClassFile.ACC_STATIC) != 0;
+        boolean isStatic = (flags & ClassFile.ACC_STATIC) != 0;
+        if (wasStatic != isStatic)
+            throw new IllegalArgumentException("Cannot change ACC_STATIC flag of method");
+        this.flags = flags;
+    }
+
+    @Override
+    public Utf8Entry methodName() {
+        return name;
+    }
+
+    @Override
+    public Utf8Entry methodType() {
+        return desc;
+    }
+
+    @Override
+    public MethodTypeDesc methodTypeSymbol() {
+        if (mDesc == null) {
+            if (original instanceof MethodInfo mi) {
+                mDesc = mi.methodTypeSymbol();
+            } else {
+                mDesc = MethodTypeDesc.ofDescriptor(methodType().stringValue());
+            }
+        }
+        return mDesc;
+    }
+
+    @Override
+    public int methodFlags() {
+        return flags;
+    }
+
+    @Override
+    public int parameterSlot(int paramNo) {
+        if (parameterSlots == null)
+            parameterSlots = Util.parseParameterSlots(methodFlags(), methodTypeSymbol());
+        return parameterSlots[paramNo];
+    }
+
+    @Override
+    public BufferedCodeBuilder bufferedCodeBuilder(CodeModel original) {
+        return new BufferedCodeBuilder(this, constantPool, context, original);
+    }
+
+    @Override
+    public MethodBuilder with(MethodElement element) {
+        if (element instanceof AbstractElement ae) {
+            ae.writeTo(this);
+        } else {
+            writeAttribute((CustomAttribute)element);
+        }
+        return this;
+    }
+
+    private MethodBuilder withCode(CodeModel original,
+                                  Consumer<? super CodeBuilder> handler) {
+        var cb = DirectCodeBuilder.build(this, handler, constantPool, context, original);
+        writeAttribute(cb);
+        return this;
+    }
+
+    @Override
+    public MethodBuilder withCode(Consumer<? super CodeBuilder> handler) {
+        return withCode(null, handler);
+    }
+
+    @Override
+    public MethodBuilder transformCode(CodeModel code, CodeTransform transform) {
+        return withCode(code, new Consumer<>() {
+            @Override
+            public void accept(CodeBuilder builder) {
+                builder.transform(code, transform);
+            }
+        });
+    }
+
+    public DirectMethodBuilder run(Consumer<? super MethodBuilder> handler) {
+        handler.accept(this);
+        return this;
+    }
+
+    @Override
+    public void writeTo(BufWriter b) {
+        BufWriterImpl buf = (BufWriterImpl) b;
+        buf.writeU2(flags);
+        buf.writeIndex(name);
+        buf.writeIndex(desc);
+        attributes.writeTo(buf);
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/classfile/impl/EntryMap.class b/tests/test_data/std/jdk/internal/classfile/impl/EntryMap.class
new file mode 100644
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diff --git a/tests/test_data/std/jdk/internal/classfile/impl/EntryMap.java b/tests/test_data/std/jdk/internal/classfile/impl/EntryMap.java
new file mode 100644
index 00000000..4270dbf7
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/classfile/impl/EntryMap.java
@@ -0,0 +1,187 @@
+/*
+ * Copyright (c) 2022, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package jdk.internal.classfile.impl;
+
+/**
+ * An open-chain multimap used to map nonzero hashes to indexes (of either CP
+ * elements or BSM entries).  Code transformed from public domain implementation
+ * (<a href="http://java-performance.info/">http://java-performance.info/</a>).
+ *
+ * The internal data structure is an array of 2N int elements, where the first
+ * element is the hash and the second is the mapped index.  To look something up
+ * in the map, provide a hash value and an index to map it to, and invoke
+ * firstToken(hash).  This returns an opaque token that can be provided to
+ * nextToken(hash, token) to get the next candidate, or to getElementByToken(token)
+ * or getIndexByToken to get the mapped element or index.
+ */
+public abstract class EntryMap<T> {
+    public static final int NO_VALUE = -1;
+
+    /**
+     * Keys and values
+     */
+    private int[] data;
+
+    /**
+     * Fill factor, must be between (0 and 1)
+     */
+    private final float fillFactor;
+    /**
+     * We will resize a map once it reaches this size
+     */
+    private int resizeThreshold;
+    /**
+     * Current map size
+     */
+    private int size;
+
+    /**
+     * Mask to calculate the original position
+     */
+    private int mask1;
+    private int mask2;
+
+    public EntryMap(int size, float fillFactor) {
+        if (fillFactor <= 0 || fillFactor >= 1)
+            throw new IllegalArgumentException("FillFactor must be in (0, 1)");
+        if (size <= 0)
+            throw new IllegalArgumentException("Size must be positive!");
+
+        int capacity = arraySize(size, fillFactor);
+        this.fillFactor = fillFactor;
+        this.resizeThreshold = (int) (capacity * fillFactor);
+        this.mask1 = capacity - 1;
+        this.mask2 = capacity * 2 - 1;
+        data = new int[capacity * 2];
+    }
+
+    protected abstract T fetchElement(int index);
+
+    public int firstToken(int hash) {
+        if (hash == 0)
+            throw new IllegalArgumentException("hash must be nonzero");
+
+        int ix = (hash & mask1) << 1;
+        int k = data[ix];
+
+        if (k == 0)
+            return NO_VALUE;  //end of chain already
+        else if (k == hash)
+            return ix;
+        else
+            return nextToken(hash, ix);
+    }
+
+    public int nextToken(int hash, int token) {
+        int ix = token;
+        while (true) {
+            ix = (ix + 2) & mask2; // next index
+            int k = data[ix];
+            if (k == 0)
+                return NO_VALUE;
+            else if (k == hash)
+                return ix;
+        }
+    }
+
+    public int getIndexByToken(int token) {
+        return data[token + 1];
+    }
+
+    public T getElementByToken(int token) {
+        return fetchElement(data[token + 1]);
+    }
+
+    public void put(int hash, int index) {
+        if (hash == 0)
+            throw new IllegalArgumentException("hash must be nonzero");
+
+        int ptr = (hash & mask1) << 1;
+        int k = data[ptr];
+        if (k == 0) {
+            data[ptr] = hash;
+            data[ptr + 1] = index;
+            if (size >= resizeThreshold)
+                rehash(data.length * 2); //size is set inside
+            else
+                ++size;
+            return;
+        }
+        else if (k == hash && data[ptr + 1] == index) {
+            return;
+        }
+
+        while (true) {
+            ptr = (ptr + 2) & mask2; // next index
+            k = data[ptr];
+            if (k == 0) {
+                data[ptr] = hash;
+                data[ptr + 1] = index;
+                if (size >= resizeThreshold)
+                    rehash(data.length * 2); //size is set inside
+                else
+                    ++size;
+                return;
+            }
+            else if (k == hash && data[ptr + 1] == index) {
+                return;
+            }
+        }
+    }
+
+    public int size() {
+        return size;
+    }
+
+    private void rehash(final int newCapacity) {
+        resizeThreshold = (int) (newCapacity / 2 * fillFactor);
+        mask1 = newCapacity / 2 - 1;
+        mask2 = newCapacity - 1;
+
+        final int oldCapacity = data.length;
+        final int[] oldData = data;
+
+        data = new int[newCapacity];
+        size = 0;
+
+        for (int i = 0; i < oldCapacity; i += 2) {
+            final int oldHash = oldData[i];
+            if (oldHash != 0)
+                put(oldHash, oldData[i + 1]);
+        }
+    }
+
+    public static long nextPowerOfTwo( long x ) {
+        return 1L << -Long.numberOfLeadingZeros(x - 1);
+    }
+
+    public static int arraySize( final int expected, final float f ) {
+        final long s = Math.max( 2, nextPowerOfTwo( (long)Math.ceil( expected / f ) ) );
+        if ( s > (1 << 30) )
+            throw new IllegalArgumentException("Too large (" + expected
+                    + " expected elements with load factor " + f + ")" );
+        return (int)s;
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/classfile/impl/FieldImpl$1.class b/tests/test_data/std/jdk/internal/classfile/impl/FieldImpl$1.class
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/classfile/impl/FieldImpl.java b/tests/test_data/std/jdk/internal/classfile/impl/FieldImpl.java
new file mode 100644
index 00000000..6645ddb9
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/classfile/impl/FieldImpl.java
@@ -0,0 +1,124 @@
+/*
+ * Copyright (c) 2022, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package jdk.internal.classfile.impl;
+
+import java.util.List;
+import java.util.Optional;
+import java.util.function.Consumer;
+
+import java.lang.classfile.*;
+import java.lang.classfile.constantpool.Utf8Entry;
+
+public final class FieldImpl
+        extends AbstractElement
+        implements FieldModel {
+
+    private final ClassReader reader;
+    private final int startPos, endPos, attributesPos;
+    private List<Attribute<?>> attributes;
+
+    public FieldImpl(ClassReader reader, int startPos, int endPos, int attributesPos) {
+        this.reader = reader;
+        this.startPos = startPos;
+        this.endPos = endPos;
+        this.attributesPos = attributesPos;
+    }
+
+    @Override
+    public AccessFlags flags() {
+        return AccessFlags.ofField(reader.readU2(startPos));
+    }
+
+    @Override
+    public Optional<ClassModel> parent() {
+        if (reader instanceof ClassReaderImpl cri)
+            return Optional.of(cri.getContainedClass());
+        else
+            return Optional.empty();
+    }
+
+    @Override
+    public Utf8Entry fieldName() {
+        return reader.readUtf8Entry(startPos + 2);
+    }
+
+    @Override
+    public Utf8Entry fieldType() {
+        return reader.readUtf8Entry(startPos + 4);
+    }
+
+    @Override
+    public List<Attribute<?>> attributes() {
+        if (attributes == null) {
+            attributes = BoundAttribute.readAttributes(this, reader, attributesPos, reader.customAttributes());
+        }
+        return attributes;
+    }
+
+    @Override
+    public void writeTo(BufWriter buf) {
+        if (buf.canWriteDirect(reader)) {
+            reader.copyBytesTo(buf, startPos, endPos - startPos);
+        }
+        else {
+            buf.writeU2(flags().flagsMask());
+            buf.writeIndex(fieldName());
+            buf.writeIndex(fieldType());
+            buf.writeList(attributes());
+        }
+    }
+
+    // FieldModel
+
+    @Override
+    public void writeTo(DirectClassBuilder builder) {
+        if (builder.canWriteDirect(reader)) {
+            builder.withField(this);
+        }
+        else {
+            builder.withField(fieldName(), fieldType(), new Consumer<>() {
+                @Override
+                public void accept(FieldBuilder fb) {
+                    FieldImpl.this.forEachElement(fb);
+                }
+            });
+        }
+    }
+
+    @Override
+    public void forEachElement(Consumer<FieldElement> consumer) {
+        consumer.accept(flags());
+        for (Attribute<?> attr : attributes()) {
+            if (attr instanceof FieldElement e)
+                consumer.accept(e);
+        }
+    }
+
+    @Override
+    public String toString() {
+        return String.format("FieldModel[fieldName=%s, fieldType=%s, flags=%d]",
+                fieldName().stringValue(), fieldType().stringValue(), flags().flagsMask());
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/classfile/impl/InterfacesImpl.class b/tests/test_data/std/jdk/internal/classfile/impl/InterfacesImpl.class
new file mode 100644
index 0000000000000000000000000000000000000000..f5336b919e9c16fd535443ed2206c27b17f7e376
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literal 2797
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zTxNKK4}oJ$CXgX*ZXM%J0;ShjjEHAQ8(@J{S;S>JK&R+lsuU!V3*wHXWKV?A7X0Y6
xB6o~?jL-`V5njM#F@~YyIld>v9{fQ63A_Lg@%PDAK^1$j$&w=61{`=8{}<673UL4c

literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/classfile/impl/InterfacesImpl.java b/tests/test_data/std/jdk/internal/classfile/impl/InterfacesImpl.java
new file mode 100644
index 00000000..242ec02c
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/classfile/impl/InterfacesImpl.java
@@ -0,0 +1,58 @@
+/*
+ * Copyright (c) 2022, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package jdk.internal.classfile.impl;
+
+import java.util.List;
+import java.util.stream.Collectors;
+
+import java.lang.classfile.constantpool.ClassEntry;
+import java.lang.classfile.Interfaces;
+
+public final class InterfacesImpl
+        extends AbstractElement
+        implements Interfaces {
+    private final List<ClassEntry> interfaces;
+
+    public InterfacesImpl(List<ClassEntry> interfaces) {
+        this.interfaces = List.copyOf(interfaces);
+    }
+
+    @Override
+    public List<ClassEntry> interfaces() {
+        return interfaces;
+    }
+
+    @Override
+    public void writeTo(DirectClassBuilder builder) {
+        builder.setInterfaces(interfaces);
+    }
+
+    @Override
+    public String toString() {
+        return String.format("Interfaces[interfaces=%s]", interfaces.stream()
+                .map(iface -> iface.name().stringValue())
+                .collect(Collectors.joining(", ")));
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/classfile/impl/LabelContext.class b/tests/test_data/std/jdk/internal/classfile/impl/LabelContext.class
new file mode 100644
index 0000000000000000000000000000000000000000..0676014ed95f123db31ca223933f82a104ead815
GIT binary patch
literal 478
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z<fjxymOJsB7AmuZNvXaZN4O2b%@H`xa^*)xcgptYDu{>KS<|zLthtSF7Yxjf!&k!8
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/classfile/impl/LabelContext.java b/tests/test_data/std/jdk/internal/classfile/impl/LabelContext.java
new file mode 100644
index 00000000..749abbed
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/classfile/impl/LabelContext.java
@@ -0,0 +1,35 @@
+/*
+ * Copyright (c) 2022, 2024, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package jdk.internal.classfile.impl;
+
+import java.lang.classfile.Label;
+
+public sealed interface LabelContext
+        permits TerminalCodeBuilder, CodeImpl {
+    Label newLabel();
+    Label getLabel(int bci);
+    void setLabelTarget(Label label, int bci);
+    int labelToBci(Label label);
+}
diff --git a/tests/test_data/std/jdk/internal/classfile/impl/LabelImpl.class b/tests/test_data/std/jdk/internal/classfile/impl/LabelImpl.class
new file mode 100644
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literal 1782
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HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/classfile/impl/LabelImpl.java b/tests/test_data/std/jdk/internal/classfile/impl/LabelImpl.java
new file mode 100644
index 00000000..b316c5a6
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/classfile/impl/LabelImpl.java
@@ -0,0 +1,85 @@
+/*
+ * Copyright (c) 2022, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package jdk.internal.classfile.impl;
+
+import java.util.Objects;
+
+import java.lang.classfile.Label;
+import java.lang.classfile.instruction.LabelTarget;
+
+/**
+ * Labels are created with a parent context, which is either a code attribute
+ * or a code builder.  A label originating in a code attribute context may be
+ * reused in a code builder context, but only labels from a single code
+ * attribute may be reused by a single code builder.  Mappings to and from
+ * BCI are the responsibility of the context in which it is used; a single
+ * word of mutable state is provided, for the exclusive use of the owning
+ * context.
+ *
+ * In practice, this means that labels created in a code attribute can simply
+ * store the BCI in the state on creation, and labels created in in a code
+ * builder can store the BCI in the state when the label is eventually set; if
+ * a code attribute label is reused in a builder, the original BCI can be used
+ * as an index into an array.
+ */
+public final class LabelImpl
+        extends AbstractElement
+        implements Label, LabelTarget {
+
+    private final LabelContext labelContext;
+    private int bci;
+
+        public LabelImpl(LabelContext labelContext, int bci) {
+        this.labelContext = Objects.requireNonNull(labelContext);
+        this.bci = bci;
+    }
+
+    public LabelContext labelContext() {
+        return labelContext;
+    }
+
+    public int getBCI() {
+        return bci;
+    }
+
+    public void setBCI(int bci) {
+        this.bci = bci;
+    }
+
+    @Override
+    public Label label() {
+        return this;
+    }
+
+    @Override
+    public void writeTo(DirectCodeBuilder builder) {
+        builder.setLabelTarget(this);
+    }
+
+    @Override
+    public String toString() {
+        return String.format("Label[context=%s, bci=%d]", labelContext, bci);
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/classfile/impl/LineNumberImpl.class b/tests/test_data/std/jdk/internal/classfile/impl/LineNumberImpl.class
new file mode 100644
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zZlZyhaTJjx>RDRZ)@w!_rA5Ccs^I;3TnI7e=_hzMkn2;no+JGlUAfV9q(35YKevIt
zm%LM&5i-OEd8o8{h`*0}8AbA^f5>=@dlj*sJ1WWWlYxt2Af2mx*in27^#wOA-kr_E
zu?SK}$XDPJE{D!jd@VCi4omO%=x--3zn8#Oidu>!o&2425?6RDW0x=<!c9<A$)!KD
zKmG{^?kf^?6NjpsI3W{`Qk#rW>km;AxW>}7isFS>L)7mR3UAP*lv-M5rIy<|R-Zwv
y|NJU>x8%&y5B&Zlaf0POi6dMG`P-H>&1RTrHi48hiP(3f#W(C{*vTfv>%Rcn_+Qfi

literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/classfile/impl/LineNumberImpl.java b/tests/test_data/std/jdk/internal/classfile/impl/LineNumberImpl.java
new file mode 100644
index 00000000..4fc4a342
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/classfile/impl/LineNumberImpl.java
@@ -0,0 +1,66 @@
+/*
+ * Copyright (c) 2022, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package jdk.internal.classfile.impl;
+
+import java.lang.classfile.instruction.LineNumber;
+
+public final class LineNumberImpl
+        extends AbstractElement
+        implements LineNumber {
+    private static final int INTERN_LIMIT = 1000;
+    private static final LineNumber[] internCache = new LineNumber[INTERN_LIMIT];
+    static {
+        for (int i=0; i<INTERN_LIMIT; i++)
+            internCache[i] = new LineNumberImpl(i);
+    }
+
+    private final int line;
+
+    private LineNumberImpl(int line) {
+        this.line = line;
+    }
+
+    public static LineNumber of(int line) {
+        return (line < INTERN_LIMIT)
+               ? internCache[line]
+               : new LineNumberImpl(line);
+    }
+
+    @Override
+    public int line() {
+        return line;
+    }
+
+    @Override
+    public void writeTo(DirectCodeBuilder writer) {
+        writer.setLineNumber(line);
+    }
+
+    @Override
+    public String toString() {
+        return String.format("LineNumber[line=%d]", line);
+    }
+}
+
diff --git a/tests/test_data/std/jdk/internal/classfile/impl/MethodImpl$1.class b/tests/test_data/std/jdk/internal/classfile/impl/MethodImpl$1.class
new file mode 100644
index 0000000000000000000000000000000000000000..44c61d1f4a3f6db67624a4705ad2aa1ece323602
GIT binary patch
literal 1192
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/classfile/impl/MethodImpl.class b/tests/test_data/std/jdk/internal/classfile/impl/MethodImpl.class
new file mode 100644
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GIT binary patch
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/classfile/impl/MethodImpl.java b/tests/test_data/std/jdk/internal/classfile/impl/MethodImpl.java
new file mode 100644
index 00000000..9a96e586
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/classfile/impl/MethodImpl.java
@@ -0,0 +1,154 @@
+/*
+ * Copyright (c) 2022, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package jdk.internal.classfile.impl;
+
+import java.lang.constant.MethodTypeDesc;
+import java.lang.classfile.*;
+import java.lang.classfile.constantpool.Utf8Entry;
+
+import java.util.List;
+import java.util.Optional;
+import java.util.function.Consumer;
+
+public final class MethodImpl
+        extends AbstractElement
+        implements MethodModel, MethodInfo {
+
+    private final ClassReader reader;
+    private final int startPos, endPos, attributesPos;
+    private List<Attribute<?>> attributes;
+    private int[] parameterSlots;
+    private MethodTypeDesc mDesc;
+
+    public MethodImpl(ClassReader reader, int startPos, int endPos, int attrStart) {
+        this.reader = reader;
+        this.startPos = startPos;
+        this.endPos = endPos;
+        this.attributesPos = attrStart;
+    }
+
+    @Override
+    public AccessFlags flags() {
+        return AccessFlags.ofMethod(reader.readU2(startPos));
+    }
+
+    @Override
+    public Optional<ClassModel> parent() {
+        if (reader instanceof ClassReaderImpl cri)
+            return Optional.of(cri.getContainedClass());
+        else
+            return Optional.empty();
+    }
+
+    @Override
+    public Utf8Entry methodName() {
+        return reader.readUtf8Entry(startPos + 2);
+    }
+
+    @Override
+    public Utf8Entry methodType() {
+        return reader.readUtf8Entry(startPos + 4);
+    }
+
+    @Override
+    public MethodTypeDesc methodTypeSymbol() {
+        if (mDesc == null) {
+            mDesc = MethodTypeDesc.ofDescriptor(methodType().stringValue());
+        }
+        return mDesc;
+    }
+
+    @Override
+    public int methodFlags() {
+        return reader.readU2(startPos);
+    }
+
+    @Override
+    public int parameterSlot(int paramNo) {
+        if (parameterSlots == null)
+            parameterSlots = Util.parseParameterSlots(methodFlags(), methodTypeSymbol());
+        return parameterSlots[paramNo];
+    }
+
+    @Override
+    public List<Attribute<?>> attributes() {
+        if (attributes == null) {
+            attributes = BoundAttribute.readAttributes(this, reader, attributesPos, reader.customAttributes());
+        }
+        return attributes;
+    }
+
+    @Override
+    public void writeTo(BufWriter b) {
+        BufWriterImpl buf = (BufWriterImpl) b;
+        if (buf.canWriteDirect(reader)) {
+            reader.copyBytesTo(buf, startPos, endPos - startPos);
+        }
+        else {
+            buf.writeU2(flags().flagsMask());
+            buf.writeIndex(methodName());
+            buf.writeIndex(methodType());
+            buf.writeList(attributes());
+        }
+    }
+
+    // MethodModel
+
+    @Override
+    public Optional<CodeModel> code() {
+        return findAttribute(Attributes.code()).map(a -> (CodeModel) a);
+    }
+
+    @Override
+    public void forEachElement(Consumer<MethodElement> consumer) {
+        consumer.accept(flags());
+        for (Attribute<?> attr : attributes()) {
+            if (attr instanceof MethodElement e)
+                consumer.accept(e);
+        }
+    }
+
+    @Override
+    public void writeTo(DirectClassBuilder builder) {
+        if (builder.canWriteDirect(reader)) {
+            builder.withMethod(this);
+        }
+        else {
+            builder.withMethod(methodName(), methodType(), methodFlags(),
+                               new Consumer<>() {
+                @Override
+                public void accept(MethodBuilder mb) {
+                    MethodImpl.this.forEachElement(mb);
+                }
+            });
+        }
+    }
+
+    @Override
+    public String toString() {
+        return String.format("MethodModel[methodName=%s, methodType=%s, flags=%d]",
+                methodName().stringValue(), methodType().stringValue(), flags().flagsMask());
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/classfile/impl/MethodInfo.class b/tests/test_data/std/jdk/internal/classfile/impl/MethodInfo.class
new file mode 100644
index 0000000000000000000000000000000000000000..cf4b528da3d235d335479d749d7e606cd8d93792
GIT binary patch
literal 723
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z(Me}uVy@13CJS61R_wVXMd{i9H3=%$B8lURAx}$&R?0IHfM!_M_d-9U*G1+si$yVX
zYG!yd%l$&eDz%Bb^lN}>h2b9V17x>K+r@(grawXv4BKQG9+DryArIJo{T&XeR{#73
zt)E!`*lB)4>$mfj?i@U#eS<9U3NAc!;o~tOcbSVP*dg?k7O{1y@Gg1;81`si!?VA~
CRJdIL

literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/classfile/impl/MethodInfo.java b/tests/test_data/std/jdk/internal/classfile/impl/MethodInfo.java
new file mode 100644
index 00000000..0dd81776
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/classfile/impl/MethodInfo.java
@@ -0,0 +1,45 @@
+/*
+ * Copyright (c) 2022, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package jdk.internal.classfile.impl;
+
+import java.lang.constant.MethodTypeDesc;
+import java.lang.classfile.constantpool.Utf8Entry;
+
+import static java.lang.classfile.ClassFile.ACC_STATIC;
+
+public interface MethodInfo {
+    Utf8Entry methodName();
+    Utf8Entry methodType();
+    MethodTypeDesc methodTypeSymbol();
+    int methodFlags();
+
+    default int receiverSlot() {
+        if ((methodFlags() & ACC_STATIC) != 0)
+            throw new IllegalStateException("not an instance method");
+        return 0;
+    }
+
+    int parameterSlot(int paramNo);
+}
diff --git a/tests/test_data/std/jdk/internal/classfile/impl/ModuleAttributeBuilderImpl.class b/tests/test_data/std/jdk/internal/classfile/impl/ModuleAttributeBuilderImpl.class
new file mode 100644
index 0000000000000000000000000000000000000000..528f5f939559b719542c2e89a6180c479db1be16
GIT binary patch
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/classfile/impl/ModuleAttributeBuilderImpl.java b/tests/test_data/std/jdk/internal/classfile/impl/ModuleAttributeBuilderImpl.java
new file mode 100644
index 00000000..1aad47cf
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/classfile/impl/ModuleAttributeBuilderImpl.java
@@ -0,0 +1,159 @@
+/*
+ * Copyright (c) 2022, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package jdk.internal.classfile.impl;
+
+import java.lang.classfile.attribute.*;
+import java.lang.classfile.attribute.ModuleAttribute.ModuleAttributeBuilder;
+import java.lang.classfile.constantpool.ClassEntry;
+import java.lang.classfile.constantpool.ModuleEntry;
+import java.lang.classfile.constantpool.Utf8Entry;
+import java.lang.constant.ModuleDesc;
+import java.lang.constant.PackageDesc;
+
+import java.lang.constant.ClassDesc;
+import java.util.*;
+
+public final class ModuleAttributeBuilderImpl
+        implements ModuleAttributeBuilder {
+
+    private ModuleEntry moduleEntry;
+    private Utf8Entry moduleVersion;
+    private int moduleFlags;
+
+    private final Set<ModuleRequireInfo> requires = new LinkedHashSet<>();
+    private final Set<ModuleExportInfo> exports = new LinkedHashSet<>();
+    private final Set<ModuleOpenInfo> opens = new LinkedHashSet<>();
+    private final Set<ClassEntry> uses = new LinkedHashSet<>();
+    private final Set<ModuleProvideInfo> provides = new LinkedHashSet<>();
+
+    public ModuleAttributeBuilderImpl(ModuleEntry moduleName) {
+        this.moduleEntry = moduleName;
+        this.moduleFlags = 0;
+    }
+
+    public ModuleAttributeBuilderImpl(ModuleDesc moduleName) {
+        this(TemporaryConstantPool.INSTANCE.moduleEntry(TemporaryConstantPool.INSTANCE.utf8Entry(moduleName.name())));
+    }
+
+    @Override
+    public ModuleAttribute build() {
+        return new UnboundAttribute.UnboundModuleAttribute(moduleEntry, moduleFlags, moduleVersion,
+                                                            requires, exports, opens, uses, provides);
+    }
+
+    @Override
+    public ModuleAttributeBuilder moduleName(ModuleDesc moduleName) {
+        Objects.requireNonNull(moduleName);
+        moduleEntry = TemporaryConstantPool.INSTANCE.moduleEntry(TemporaryConstantPool.INSTANCE.utf8Entry(moduleName.name()));
+        return this;
+    }
+
+    @Override
+    public ModuleAttributeBuilder moduleFlags(int flags) {
+        this.moduleFlags = flags;
+        return this;
+    }
+
+    @Override
+    public ModuleAttributeBuilder moduleVersion(String version) {
+        moduleVersion = version == null ? null : TemporaryConstantPool.INSTANCE.utf8Entry(version);
+        return this;
+    }
+
+    @Override
+    public ModuleAttributeBuilder requires(ModuleDesc module, int flags, String version) {
+        Objects.requireNonNull(module);
+        return requires(ModuleRequireInfo.of(TemporaryConstantPool.INSTANCE.moduleEntry(TemporaryConstantPool.INSTANCE.utf8Entry(module.name())), flags, version == null ? null : TemporaryConstantPool.INSTANCE.utf8Entry(version)));
+    }
+
+    @Override
+    public ModuleAttributeBuilder requires(ModuleRequireInfo requires) {
+        Objects.requireNonNull(requires);
+        this.requires.add(requires);
+        return this;
+    }
+
+    @Override
+    public ModuleAttributeBuilder exports(PackageDesc pkge, int flags, ModuleDesc... exportsToModules) {
+        Objects.requireNonNull(pkge);
+        var exportsTo = new ArrayList<ModuleEntry>(exportsToModules.length);
+        for (var e : exportsToModules)
+            exportsTo.add(TemporaryConstantPool.INSTANCE.moduleEntry(TemporaryConstantPool.INSTANCE.utf8Entry(e.name())));
+        return exports(ModuleExportInfo.of(TemporaryConstantPool.INSTANCE.packageEntry(TemporaryConstantPool.INSTANCE.utf8Entry(pkge.internalName())), flags, exportsTo));
+    }
+
+    @Override
+    public ModuleAttributeBuilder exports(ModuleExportInfo exports) {
+        Objects.requireNonNull(exports);
+        this.exports.add(exports);
+        return this;
+    }
+
+    @Override
+    public ModuleAttributeBuilder opens(PackageDesc pkge, int flags, ModuleDesc... opensToModules) {
+        Objects.requireNonNull(pkge);
+        var opensTo = new ArrayList<ModuleEntry>(opensToModules.length);
+        for (var e : opensToModules)
+            opensTo.add(TemporaryConstantPool.INSTANCE.moduleEntry(TemporaryConstantPool.INSTANCE.utf8Entry(e.name())));
+        return opens(ModuleOpenInfo.of(TemporaryConstantPool.INSTANCE.packageEntry(TemporaryConstantPool.INSTANCE.utf8Entry(pkge.internalName())), flags, opensTo));
+    }
+
+    @Override
+    public ModuleAttributeBuilder opens(ModuleOpenInfo opens) {
+        Objects.requireNonNull(opens);
+        this.opens.add(opens);
+        return this;
+    }
+
+    @Override
+    public ModuleAttributeBuilder uses(ClassDesc service) {
+        Objects.requireNonNull(service);
+        return uses(TemporaryConstantPool.INSTANCE.classEntry(service));
+    }
+
+    @Override
+    public ModuleAttributeBuilder uses(ClassEntry uses) {
+        Objects.requireNonNull(uses);
+        this.uses.add(uses);
+        return this;
+    }
+
+    @Override
+    public ModuleAttributeBuilder provides(ClassDesc service, ClassDesc... implClasses) {
+        Objects.requireNonNull(service);
+        var impls = new ArrayList<ClassEntry>(implClasses.length);
+        for (var seq : implClasses)
+            impls.add(TemporaryConstantPool.INSTANCE.classEntry(seq));
+        return provides(ModuleProvideInfo.of(TemporaryConstantPool.INSTANCE.classEntry(service), impls));
+    }
+
+    @Override
+    public ModuleAttributeBuilder provides(ModuleProvideInfo provides) {
+        Objects.requireNonNull(provides);
+        this.provides.add(provides);
+        return this;
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/classfile/impl/NonterminalCodeBuilder.class b/tests/test_data/std/jdk/internal/classfile/impl/NonterminalCodeBuilder.class
new file mode 100644
index 0000000000000000000000000000000000000000..3f6341ca0ae37626f541f6b2accf4ba557a01425
GIT binary patch
literal 2243
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zzKZ*tea0PE$vs8OHvR8&R5NuBfd`!5LFx@DCN-orEc2i5g!3=iSku!*wl~~1!I8$+
zIKg0+MfOU7C64ManJl@#!Zm>(xk^Nol~lk&L``i;uNDoVDkr}vga`Ci()25Y(O0;U
z=zv&`AcmW6Z%@*XhxmXXLRHxo*nj9`1%4uQoQ~O*4r?mCx*TY}6X9VOg!O2b99gj5
scIUF#iL}uLNo7zm-oPV{y_|i7JU-z(L)-$_X-qJ;&2<T%Gy5a|0%}Yix&QzG

literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/classfile/impl/NonterminalCodeBuilder.java b/tests/test_data/std/jdk/internal/classfile/impl/NonterminalCodeBuilder.java
new file mode 100644
index 00000000..9c27f0f5
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/classfile/impl/NonterminalCodeBuilder.java
@@ -0,0 +1,71 @@
+/*
+ * Copyright (c) 2022, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package jdk.internal.classfile.impl;
+
+import java.util.Optional;
+
+import java.lang.classfile.CodeBuilder;
+import java.lang.classfile.CodeModel;
+import java.lang.classfile.Label;
+import java.lang.classfile.constantpool.ConstantPoolBuilder;
+
+public abstract sealed class NonterminalCodeBuilder implements CodeBuilder
+    permits ChainedCodeBuilder, BlockCodeBuilderImpl {
+    protected final TerminalCodeBuilder terminal;
+    protected final CodeBuilder parent;
+
+    public NonterminalCodeBuilder(CodeBuilder parent) {
+        this.parent = parent;
+        this.terminal = switch (parent) {
+            case NonterminalCodeBuilder cb -> cb.terminal;
+            case TerminalCodeBuilder cb -> cb;
+        };
+    }
+
+    @Override
+    public int receiverSlot() {
+        return terminal.receiverSlot();
+    }
+
+    @Override
+    public int parameterSlot(int paramNo) {
+        return terminal.parameterSlot(paramNo);
+    }
+
+    @Override
+    public ConstantPoolBuilder constantPool() {
+        return terminal.constantPool();
+    }
+
+    @Override
+    public Optional<CodeModel> original() {
+        return terminal.original();
+    }
+
+    @Override
+    public Label newLabel() {
+        return terminal.newLabel();
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/classfile/impl/RawBytecodeHelper.class b/tests/test_data/std/jdk/internal/classfile/impl/RawBytecodeHelper.class
new file mode 100644
index 0000000000000000000000000000000000000000..5c1cbe2ce45eee3a97324658598d9779fc92d6ff
GIT binary patch
literal 4398
zcmb7{33yc1703T~)+9{GOhPa#AYy>93`ry^BoGoIM24Uw1Ob&yW+r69Fi9s9S*p;A
zMOt?el}f3Y+Ek>q3PfwgZnU-5?wj3LYxjN87L4bA<}pkGKfmVt-tXOa-g*Cf?s?~)
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/classfile/impl/RawBytecodeHelper.java b/tests/test_data/std/jdk/internal/classfile/impl/RawBytecodeHelper.java
new file mode 100644
index 00000000..3e5d6624
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/classfile/impl/RawBytecodeHelper.java
@@ -0,0 +1,171 @@
+/*
+ * Copyright (c) 2022, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package jdk.internal.classfile.impl;
+
+import java.nio.ByteBuffer;
+import static java.lang.classfile.ClassFile.ASTORE_3;
+import static java.lang.classfile.ClassFile.ISTORE;
+import static java.lang.classfile.ClassFile.LOOKUPSWITCH;
+import static java.lang.classfile.ClassFile.TABLESWITCH;
+import static java.lang.classfile.ClassFile.WIDE;
+
+public final class RawBytecodeHelper {
+
+    public static final int ILLEGAL = -1;
+
+    private static final byte[] LENGTHS = new byte[] {
+        1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 2, 3, 2, 3, 3, 2 | (4 << 4), 2 | (4 << 4), 2 | (4 << 4), 2 | (4 << 4), 2 | (4 << 4), 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
+        2 | (4 << 4), 2 | (4 << 4), 2 | (4 << 4), 2 | (4 << 4), 2 | (4 << 4), 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
+        1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 3 | (6 << 4), 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2 | (4 << 4), 0, 0, 1, 1, 1,
+        1, 1, 1, 3, 3, 3, 3, 3, 3, 3, 5, 5, 3, 2, 3, 1, 1, 3, 3, 1, 1, 0, 4, 3, 3, 5, 5, 0, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 4, 4, 4, 2, 4, 3, 3, 0, 0, 1, 3, 2, 3, 3, 3, 1, 2, 1,
+        -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1
+    };
+
+    public static boolean isStoreIntoLocal(int code) {
+        return (ISTORE <= code && code <= ASTORE_3);
+    }
+
+    public static int align(int n) {
+        return (n + 3) & ~3;
+    }
+
+    private final ByteBuffer bytecode;
+    public int bci, nextBci, endBci;
+    public int rawCode;
+    public boolean isWide;
+
+    public RawBytecodeHelper(ByteBuffer bytecode) {
+        this.bytecode = bytecode;
+        this.bci = 0;
+        this.nextBci = 0;
+        this.endBci = bytecode.capacity();
+    }
+
+    public boolean isLastBytecode() {
+        return nextBci >= endBci;
+    }
+
+    public int getShort(int bci) {
+        return bytecode.getShort(bci);
+    }
+
+    public int dest() {
+        return bci + getShort(bci + 1);
+    }
+
+    public int getInt(int bci) {
+        return bytecode.getInt(bci);
+    }
+
+    public int destW() {
+        return bci + getInt(bci + 1);
+    }
+
+    public int getIndexU1() {
+        return bytecode.get(bci + 1) & 0xff;
+    }
+
+    public int getU1(int bci) {
+        return bytecode.get(bci) & 0xff;
+    }
+
+    public int rawNext(int jumpTo) {
+        this.nextBci = jumpTo;
+        return rawNext();
+    }
+
+    public int rawNext() {
+        bci = nextBci;
+        int code = bytecode.get(bci) & 0xff;
+        int len = LENGTHS[code] & 0xf;
+        if (len > 0 && (bci <= endBci - len)) {
+            isWide = false;
+            nextBci += len;
+            if (nextBci <= bci) {
+                code = ILLEGAL;
+            }
+            rawCode = code;
+            return code;
+        } else {
+            len = switch (bytecode.get(bci) & 0xff) {
+                case WIDE -> {
+                    if (bci + 1 >= endBci) {
+                        yield -1;
+                    }
+                    yield LENGTHS[bytecode.get(bci + 1) & 0xff] >> 4;
+                }
+                case TABLESWITCH -> {
+                    int aligned_bci = align(bci + 1);
+                    if (aligned_bci + 3 * 4 >= endBci) {
+                        yield -1;
+                    }
+                    int lo = bytecode.getInt(aligned_bci + 1 * 4);
+                    int hi = bytecode.getInt(aligned_bci + 2 * 4);
+                    int l = aligned_bci - bci + (3 + hi - lo + 1) * 4;
+                    if (l > 0) yield l; else yield -1;
+                }
+                case LOOKUPSWITCH -> {
+                    int aligned_bci = align(bci + 1);
+                    if (aligned_bci + 2 * 4 >= endBci) {
+                        yield -1;
+                    }
+                    int npairs = bytecode.getInt(aligned_bci + 4);
+                    int l = aligned_bci - bci + (2 + 2 * npairs) * 4;
+                    if (l > 0) yield l; else yield -1;
+                }
+                default ->
+                    0;
+            };
+            if (len <= 0 || (bci > endBci - len) || (bci - len >= nextBci)) {
+                code = ILLEGAL;
+            } else {
+                nextBci += len;
+                isWide = false;
+                if (code == WIDE) {
+                    if (bci + 1 >= endBci) {
+                        code = ILLEGAL;
+                    } else {
+                        code = bytecode.get(bci + 1) & 0xff;
+                        isWide = true;
+                    }
+                }
+            }
+            rawCode = code;
+            return code;
+        }
+    }
+
+    public int getIndex() {
+        return (isWide) ? getIndexU2Raw(bci + 2) : getIndexU1();
+    }
+
+    public int getIndexU2() {
+        return getIndexU2Raw(bci + 1);
+    }
+
+    public int getIndexU2Raw(int bci) {
+        return bytecode.getShort(bci) & 0xffff;
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/classfile/impl/SignaturesImpl$1.class b/tests/test_data/std/jdk/internal/classfile/impl/SignaturesImpl$1.class
new file mode 100644
index 0000000000000000000000000000000000000000..0e0ce8c582399504cc86f10b12e7b50ab7e93ece
GIT binary patch
literal 1080
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BB1r%M

literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/classfile/impl/SignaturesImpl$ArrayTypeSigImpl.class b/tests/test_data/std/jdk/internal/classfile/impl/SignaturesImpl$ArrayTypeSigImpl.class
new file mode 100644
index 0000000000000000000000000000000000000000..2982b1fd08c228745c889ae6a27b700c8aadb882
GIT binary patch
literal 2406
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/classfile/impl/SignaturesImpl$BaseTypeSigImpl.class b/tests/test_data/std/jdk/internal/classfile/impl/SignaturesImpl$BaseTypeSigImpl.class
new file mode 100644
index 0000000000000000000000000000000000000000..bad091802af965b766b10e024fb478da6d5954be
GIT binary patch
literal 1962
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/classfile/impl/SignaturesImpl$ClassSignatureImpl.class b/tests/test_data/std/jdk/internal/classfile/impl/SignaturesImpl$ClassSignatureImpl.class
new file mode 100644
index 0000000000000000000000000000000000000000..eec9d901f11f5dfc9890acc6f219a871348b0b1e
GIT binary patch
literal 3531
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diff --git a/tests/test_data/std/jdk/internal/classfile/impl/SignaturesImpl$ClassTypeSigImpl.class b/tests/test_data/std/jdk/internal/classfile/impl/SignaturesImpl$ClassTypeSigImpl.class
new file mode 100644
index 0000000000000000000000000000000000000000..60c856b00565f101db5efa9ac395ddc68561317a
GIT binary patch
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diff --git a/tests/test_data/std/jdk/internal/classfile/impl/SignaturesImpl$MethodSignatureImpl.class b/tests/test_data/std/jdk/internal/classfile/impl/SignaturesImpl$MethodSignatureImpl.class
new file mode 100644
index 0000000000000000000000000000000000000000..90cb96bbc3de67d04d09272b4f41900cb8ca611b
GIT binary patch
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diff --git a/tests/test_data/std/jdk/internal/classfile/impl/SignaturesImpl$TypeArgImpl.class b/tests/test_data/std/jdk/internal/classfile/impl/SignaturesImpl$TypeArgImpl.class
new file mode 100644
index 0000000000000000000000000000000000000000..08ec79a7c71c396c0f0b18380c92a998514f8d04
GIT binary patch
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diff --git a/tests/test_data/std/jdk/internal/classfile/impl/SignaturesImpl$TypeParamImpl.class b/tests/test_data/std/jdk/internal/classfile/impl/SignaturesImpl$TypeParamImpl.class
new file mode 100644
index 0000000000000000000000000000000000000000..a3dc117877903f0feb16c514eab73543fdfa3a30
GIT binary patch
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diff --git a/tests/test_data/std/jdk/internal/classfile/impl/SignaturesImpl$TypeVarSigImpl.class b/tests/test_data/std/jdk/internal/classfile/impl/SignaturesImpl$TypeVarSigImpl.class
new file mode 100644
index 0000000000000000000000000000000000000000..2fb1367c401ace63e0b224fadb523be6c842409f
GIT binary patch
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diff --git a/tests/test_data/std/jdk/internal/classfile/impl/SignaturesImpl$UnboundedTypeArgImpl.class b/tests/test_data/std/jdk/internal/classfile/impl/SignaturesImpl$UnboundedTypeArgImpl.class
new file mode 100644
index 0000000000000000000000000000000000000000..aac716d4f4b0cc9dd5bf085458509e211e3b187c
GIT binary patch
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/classfile/impl/SignaturesImpl.class b/tests/test_data/std/jdk/internal/classfile/impl/SignaturesImpl.class
new file mode 100644
index 0000000000000000000000000000000000000000..329e3aaf462249f51a380f4575cb31ad87f99b91
GIT binary patch
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HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/classfile/impl/SignaturesImpl.java b/tests/test_data/std/jdk/internal/classfile/impl/SignaturesImpl.java
new file mode 100644
index 00000000..77f6933a
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/classfile/impl/SignaturesImpl.java
@@ -0,0 +1,374 @@
+/*
+ * Copyright (c) 2022, 2024, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package jdk.internal.classfile.impl;
+
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Objects;
+import java.util.Optional;
+import java.util.Collections;
+import java.lang.classfile.ClassSignature;
+import java.lang.classfile.MethodSignature;
+import java.lang.classfile.Signature;
+import java.lang.classfile.Signature.*;
+
+public final class SignaturesImpl {
+
+    public SignaturesImpl(String signature) {
+        this.sig = Objects.requireNonNull(signature);
+        this.sigp = 0;
+    }
+
+    private final String sig;
+    private int sigp;
+
+    public ClassSignature parseClassSignature() {
+        try {
+            List<TypeParam> typeParamTypes = parseParamTypes();
+            ClassTypeSig superclass = classTypeSig();
+            ArrayList<ClassTypeSig> superinterfaces = null;
+            while (sigp < sig.length()) {
+                if (superinterfaces == null)
+                    superinterfaces = new ArrayList<>();
+                superinterfaces.add(classTypeSig());
+            }
+            return new ClassSignatureImpl(typeParamTypes, superclass, null2Empty(superinterfaces));
+        } catch (IndexOutOfBoundsException e) {
+            throw error("Not a valid class signature");
+        }
+    }
+
+    public MethodSignature parseMethodSignature() {
+        try {
+            List<TypeParam> typeParamTypes = parseParamTypes();
+            require('(');
+            ArrayList<Signature> paramTypes = null;
+            while (!match(')')) {
+                if (paramTypes == null)
+                    paramTypes = new ArrayList<>();
+                paramTypes.add(typeSig());
+            }
+            Signature returnType = typeSig();
+            ArrayList<ThrowableSig> throwsTypes = null;
+            while (sigp < sig.length()) {
+                require('^');
+                if (throwsTypes == null)
+                    throwsTypes = new ArrayList<>();
+                var t = referenceTypeSig();
+                if (t instanceof ThrowableSig ts)
+                    throwsTypes.add(ts);
+                else
+                    throw error("Not a valid throwable signature %s in".formatted(t.signatureString()));
+            }
+            return new MethodSignatureImpl(typeParamTypes, null2Empty(throwsTypes), returnType, null2Empty(paramTypes));
+        } catch (IndexOutOfBoundsException e) {
+            throw error("Not a valid method signature");
+        }
+    }
+
+    public Signature parseSignature() {
+        try {
+            var s = typeSig();
+            if (sigp == sig.length())
+                return s;
+        } catch (IndexOutOfBoundsException e) {
+        }
+        throw error("Not a valid type signature");
+    }
+
+    private List<TypeParam> parseParamTypes() {
+        ArrayList<TypeParam> typeParamTypes = null;
+        if (match('<')) {
+            typeParamTypes = new ArrayList<>();
+            // cannot have empty <>
+            do {
+                String name = sig.substring(sigp, requireIdentifier());
+                RefTypeSig classBound = null;
+                ArrayList<RefTypeSig> interfaceBounds = null;
+                require(':');
+                if (sig.charAt(sigp) != ':')
+                    classBound = referenceTypeSig();
+                while (match(':')) {
+                    if (interfaceBounds == null)
+                        interfaceBounds = new ArrayList<>();
+                    interfaceBounds.add(referenceTypeSig());
+                }
+                typeParamTypes.add(new TypeParamImpl(name, Optional.ofNullable(classBound), null2Empty(interfaceBounds)));
+            } while (!match('>'));
+        }
+        return null2Empty(typeParamTypes);
+    }
+
+    private Signature typeSig() {
+        char c = sig.charAt(sigp++);
+        switch (c) {
+            case 'B','C','D','F','I','J','V','S','Z': return Signature.BaseTypeSig.of(c);
+            default:
+                sigp--;
+                return referenceTypeSig();
+        }
+    }
+
+    private RefTypeSig referenceTypeSig() {
+        return switch (sig.charAt(sigp)) {
+            case 'L' -> classTypeSig();
+            case 'T' -> {
+                sigp++;
+                var ty = Signature.TypeVarSig.of(sig.substring(sigp, requireIdentifier()));
+                require(';');
+                yield ty;
+            }
+            case '[' -> {
+                sigp++;
+                yield ArrayTypeSig.of(typeSig());
+            }
+            default -> throw unexpectedError("a type signature");
+        };
+    }
+
+    private TypeArg typeArg() {
+        char c = sig.charAt(sigp++);
+        switch (c) {
+            case '*': return TypeArg.unbounded();
+            case '+': return TypeArg.extendsOf(referenceTypeSig());
+            case '-': return TypeArg.superOf(referenceTypeSig());
+            default:
+                sigp--;
+                return TypeArg.of(referenceTypeSig());
+        }
+    }
+
+    private ClassTypeSig classTypeSig() {
+        require('L');
+        Signature.ClassTypeSig t = null;
+
+        do {
+            int start = sigp;
+            requireIdentifier();
+            if (t == null) {
+                while (match('/')) {
+                    requireIdentifier();
+                }
+            }
+            String className = sig.substring(start, sigp);
+
+            ArrayList<TypeArg> argTypes;
+            if (match('<')) {
+                // cannot have empty <>
+                argTypes = new ArrayList<>();
+                do {
+                    argTypes.add(typeArg());
+                } while (!match('>'));
+            } else {
+                argTypes = null;
+            }
+
+            boolean end = match(';');
+            if (end || match('.')) {
+                t = new ClassTypeSigImpl(Optional.ofNullable(t), className, null2Empty(argTypes));
+                if (end)
+                    return t;
+            } else {
+                throw unexpectedError(". or ;");
+            }
+        } while (true);
+    }
+
+    /**
+     * Tries to match a character, and moves pointer if it matches.
+     */
+    private boolean match(char c) {
+        if (sigp < sig.length() && sig.charAt(sigp) == c) {
+            sigp++;
+            return true;
+        }
+        return false;
+    }
+
+    /**
+     * Requires a character and moves past it, failing otherwise.
+     */
+    private void require(char c) {
+        if (!match(c))
+            throw unexpectedError(String.valueOf(c));
+    }
+
+    /**
+     * Requires an identifier, moving pointer to next illegal character and returning
+     * its position. Fails if the identifier is empty.
+     */
+    private int requireIdentifier() {
+        int start = sigp;
+        l:
+        while (sigp < sig.length()) {
+            switch (sig.charAt(sigp)) {
+                case '.', ';', '[', '/', '<', '>', ':' -> {
+                    break l;
+                }
+            }
+            sigp++;
+        }
+        if (start == sigp) {
+            throw unexpectedError("an identifier");
+        }
+        return sigp;
+    }
+
+    public static record BaseTypeSigImpl(char baseType) implements Signature.BaseTypeSig {
+
+        @Override
+        public String signatureString() {
+            return "" + baseType;
+        }
+    }
+
+    public static record TypeVarSigImpl(String identifier) implements Signature.TypeVarSig {
+
+        @Override
+        public String signatureString() {
+            return "T" + identifier + ';';
+        }
+    }
+
+    public static record ArrayTypeSigImpl(int arrayDepth, Signature elemType) implements Signature.ArrayTypeSig {
+
+        @Override
+        public Signature componentSignature() {
+            return arrayDepth > 1 ? new ArrayTypeSigImpl(arrayDepth - 1, elemType) : elemType;
+        }
+
+        @Override
+        public String signatureString() {
+            return "[".repeat(arrayDepth) + elemType.signatureString();
+        }
+    }
+
+    public static record ClassTypeSigImpl(Optional<ClassTypeSig> outerType, String className, List<Signature.TypeArg> typeArgs)
+            implements Signature.ClassTypeSig {
+
+        @Override
+        public String signatureString() {
+            String prefix = "L";
+            if (outerType.isPresent()) {
+                prefix = outerType.get().signatureString();
+                assert prefix.charAt(prefix.length() - 1) == ';';
+                prefix = prefix.substring(0, prefix.length() - 1) + '.';
+            }
+            String suffix = ";";
+            if (!typeArgs.isEmpty()) {
+                var sb = new StringBuilder();
+                sb.append('<');
+                for (var ta : typeArgs) {
+                    switch (ta) {
+                        case TypeArg.Bounded b -> {
+                            switch (b.wildcardIndicator()) {
+                                case SUPER -> sb.append('-');
+                                case EXTENDS -> sb.append('+');
+                            }
+                            sb.append(b.boundType().signatureString());
+                        }
+                        case TypeArg.Unbounded _ -> sb.append('*');
+                    }
+                }
+                suffix = sb.append(">;").toString();
+            }
+            return prefix + className + suffix;
+        }
+    }
+
+    public static enum UnboundedTypeArgImpl implements TypeArg.Unbounded {
+        INSTANCE;
+    }
+
+    public static record TypeArgImpl(WildcardIndicator wildcardIndicator, RefTypeSig boundType) implements Signature.TypeArg.Bounded {
+    }
+
+    public static record TypeParamImpl(String identifier, Optional<RefTypeSig> classBound, List<RefTypeSig> interfaceBounds)
+            implements TypeParam {
+    }
+
+    private static StringBuilder printTypeParameters(List<TypeParam> typeParameters) {
+        var sb = new StringBuilder();
+        if (typeParameters != null && !typeParameters.isEmpty()) {
+            sb.append('<');
+            for (var tp : typeParameters) {
+                sb.append(tp.identifier()).append(':');
+                if (tp.classBound().isPresent())
+                    sb.append(tp.classBound().get().signatureString());
+                if (tp.interfaceBounds() != null) for (var is : tp.interfaceBounds())
+                    sb.append(':').append(is.signatureString());
+            }
+            sb.append('>');
+        }
+        return sb;
+    }
+
+    public static record ClassSignatureImpl(List<TypeParam> typeParameters, ClassTypeSig superclassSignature,
+            List<ClassTypeSig> superinterfaceSignatures) implements ClassSignature {
+
+        @Override
+        public String signatureString() {
+            var sb = printTypeParameters(typeParameters);
+            sb.append(superclassSignature.signatureString());
+            if (superinterfaceSignatures != null) for (var in : superinterfaceSignatures)
+                sb.append(in.signatureString());
+            return sb.toString();
+        }
+    }
+
+    public static record MethodSignatureImpl(
+            List<TypeParam> typeParameters,
+            List<ThrowableSig> throwableSignatures,
+            Signature result,
+            List<Signature> arguments) implements MethodSignature {
+
+        @Override
+        public String signatureString() {
+            var sb = printTypeParameters(typeParameters);
+            sb.append('(');
+            for (var a : arguments)
+                sb.append(a.signatureString());
+            sb.append(')').append(result.signatureString());
+            if (!throwableSignatures.isEmpty())
+                for (var t : throwableSignatures)
+                    sb.append('^').append(t.signatureString());
+            return sb.toString();
+        }
+    }
+
+    private static <T> List<T> null2Empty(ArrayList<T> l) {
+        return l == null ? List.of() : Collections.unmodifiableList(l);
+    }
+
+    private IllegalArgumentException unexpectedError(String expected) {
+        return error(sigp < sig.length() ? "Unexpected character %c at position %d, expected %s"
+                .formatted(sig.charAt(sigp), sigp, expected)
+                : "Unexpected end of signature at position %d, expected %s".formatted(sigp, expected));
+    }
+
+    private IllegalArgumentException error(String message) {
+        return new IllegalArgumentException("%s: %s".formatted(message, sig));
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/classfile/impl/SplitConstantPool$1.class b/tests/test_data/std/jdk/internal/classfile/impl/SplitConstantPool$1.class
new file mode 100644
index 0000000000000000000000000000000000000000..e0dba9809591166ce0039f81fb46dbc904bf7fd6
GIT binary patch
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literal 0
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diff --git a/tests/test_data/std/jdk/internal/classfile/impl/SplitConstantPool$2.class b/tests/test_data/std/jdk/internal/classfile/impl/SplitConstantPool$2.class
new file mode 100644
index 0000000000000000000000000000000000000000..0074ee13e935703d827905251225d253b1ad229d
GIT binary patch
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diff --git a/tests/test_data/std/jdk/internal/classfile/impl/SplitConstantPool$3.class b/tests/test_data/std/jdk/internal/classfile/impl/SplitConstantPool$3.class
new file mode 100644
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GIT binary patch
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diff --git a/tests/test_data/std/jdk/internal/classfile/impl/SplitConstantPool.class b/tests/test_data/std/jdk/internal/classfile/impl/SplitConstantPool.class
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BJe2?d

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diff --git a/tests/test_data/std/jdk/internal/classfile/impl/SplitConstantPool.java b/tests/test_data/std/jdk/internal/classfile/impl/SplitConstantPool.java
new file mode 100644
index 00000000..b034328f
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/classfile/impl/SplitConstantPool.java
@@ -0,0 +1,606 @@
+/*
+ * Copyright (c) 2022, 2024, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package jdk.internal.classfile.impl;
+
+import java.lang.constant.ConstantDesc;
+import java.lang.constant.MethodTypeDesc;
+import java.util.Arrays;
+import java.util.List;
+
+import java.lang.classfile.Attribute;
+import java.lang.classfile.Attributes;
+import java.lang.classfile.ClassReader;
+import java.lang.classfile.ClassFile;
+import java.lang.classfile.BootstrapMethodEntry;
+import java.lang.classfile.BufWriter;
+import java.lang.classfile.attribute.BootstrapMethodsAttribute;
+import java.lang.classfile.constantpool.*;
+import java.util.Objects;
+
+import static java.lang.classfile.ClassFile.TAG_CLASS;
+import static java.lang.classfile.ClassFile.TAG_CONSTANTDYNAMIC;
+import static java.lang.classfile.ClassFile.TAG_DOUBLE;
+import static java.lang.classfile.ClassFile.TAG_FIELDREF;
+import static java.lang.classfile.ClassFile.TAG_FLOAT;
+import static java.lang.classfile.ClassFile.TAG_INTEGER;
+import static java.lang.classfile.ClassFile.TAG_INTERFACEMETHODREF;
+import static java.lang.classfile.ClassFile.TAG_INVOKEDYNAMIC;
+import static java.lang.classfile.ClassFile.TAG_LONG;
+import static java.lang.classfile.ClassFile.TAG_METHODHANDLE;
+import static java.lang.classfile.ClassFile.TAG_METHODREF;
+import static java.lang.classfile.ClassFile.TAG_METHODTYPE;
+import static java.lang.classfile.ClassFile.TAG_MODULE;
+import static java.lang.classfile.ClassFile.TAG_NAMEANDTYPE;
+import static java.lang.classfile.ClassFile.TAG_PACKAGE;
+import static java.lang.classfile.ClassFile.TAG_STRING;
+
+public final class SplitConstantPool implements ConstantPoolBuilder {
+
+    private final ClassReaderImpl parent;
+    private final int parentSize, parentBsmSize;
+
+    private int size, bsmSize;
+    private PoolEntry[] myEntries;
+    private BootstrapMethodEntryImpl[] myBsmEntries;
+    private boolean doneFullScan;
+    private EntryMap<PoolEntry> map;
+    private EntryMap<BootstrapMethodEntryImpl> bsmMap;
+
+    public SplitConstantPool() {
+        this.size = 1;
+        this.bsmSize = 0;
+        this.myEntries = new PoolEntry[1024];
+        this.myBsmEntries = new BootstrapMethodEntryImpl[8];
+        this.parent = null;
+        this.parentSize = 0;
+        this.parentBsmSize = 0;
+        this.doneFullScan = true;
+    }
+
+    public SplitConstantPool(ClassReader parent) {
+        this.parent = (ClassReaderImpl) parent;
+        this.parentSize = parent.size();
+        this.parentBsmSize = parent.bootstrapMethodCount();
+        this.size = parentSize;
+        this.bsmSize = parentBsmSize;
+        this.myEntries = new PoolEntry[8];
+        this.myBsmEntries = new BootstrapMethodEntryImpl[8];
+        this.doneFullScan = true;
+    }
+
+    @Override
+    public int size() {
+        return size;
+    }
+
+    @Override
+    public int bootstrapMethodCount() {
+        return bsmSize;
+    }
+
+    @Override
+    public PoolEntry entryByIndex(int index) {
+        if (index <= 0 || index >= size()) {
+            throw new ConstantPoolException("Bad CP index: " + index);
+        }
+        PoolEntry pe = (index < parentSize)
+               ? parent.entryByIndex(index)
+               : myEntries[index - parentSize];
+        if (pe == null) {
+            throw new ConstantPoolException("Unusable CP index: " + index);
+        }
+        return pe;
+    }
+
+    @Override
+    public <T extends PoolEntry> T entryByIndex(int index, Class<T> cls) {
+        Objects.requireNonNull(cls);
+        return ClassReaderImpl.checkType(entryByIndex(index), index, cls);
+    }
+
+    @Override
+    public BootstrapMethodEntryImpl bootstrapMethodEntry(int index) {
+        if (index < 0 || index >= bootstrapMethodCount()) {
+            throw new ConstantPoolException("Bad BSM index: " + index);
+        }
+        return (index < parentBsmSize)
+               ? parent.bootstrapMethodEntry(index)
+               : myBsmEntries[index - parentBsmSize];
+    }
+
+    @Override
+    public boolean canWriteDirect(ConstantPool other) {
+        return this == other || parent == other;
+    }
+
+    @Override
+    public boolean writeBootstrapMethods(BufWriter buf) {
+        if (bsmSize == 0)
+            return false;
+        int pos = buf.size();
+        if (parent != null && parentBsmSize != 0) {
+            parent.writeBootstrapMethods(buf);
+            for (int i = parentBsmSize; i < bsmSize; i++)
+                bootstrapMethodEntry(i).writeTo(buf);
+            int attrLen = buf.size() - pos;
+            buf.patchInt(pos + 2, 4, attrLen - 6);
+            buf.patchInt(pos + 6, 2, bsmSize);
+        }
+        else {
+            Attribute<BootstrapMethodsAttribute> a
+                    = new UnboundAttribute.AdHocAttribute<>(Attributes.bootstrapMethods()) {
+
+                @Override
+                public void writeBody(BufWriter b) {
+                    buf.writeU2(bsmSize);
+                    for (int i = 0; i < bsmSize; i++)
+                        bootstrapMethodEntry(i).writeTo(buf);
+                }
+            };
+            a.writeTo(buf);
+        }
+        return true;
+    }
+
+    @Override
+    public void writeTo(BufWriter buf) {
+        int writeFrom = 1;
+        if (size() >= 65536) {
+            throw new IllegalArgumentException(String.format("Constant pool is too large %d", size()));
+        }
+        buf.writeU2(size());
+        if (parent != null && buf.constantPool().canWriteDirect(this)) {
+            parent.writeConstantPoolEntries(buf);
+            writeFrom = parent.size();
+        }
+        for (int i = writeFrom; i < size(); ) {
+            PoolEntry info = entryByIndex(i);
+            info.writeTo(buf);
+            i += info.width();
+        }
+    }
+
+    private EntryMap<PoolEntry> map() {
+        if (map == null) {
+            map = new EntryMap<>(Math.max(size, 1024), .75f) {
+                @Override
+                protected PoolEntry fetchElement(int index) {
+                    return entryByIndex(index);
+                }
+            };
+            // Doing a full scan here yields fall-off-the-cliff performance results,
+            // especially if we only need a few entries that are already
+            // inflated (such as attribute names).
+            // So we inflate the map with whatever we've got from the parent, and
+            // later, if we miss, we do a one-time full inflation before creating
+            // a new entry.
+            for (int i=1; i<parentSize;) {
+                PoolEntry cpi = parent.cp[i];
+                if (cpi == null) {
+                    doneFullScan = false;
+                    i++;
+                } else {
+                    map.put(cpi.hashCode(), cpi.index());
+                    i += cpi.width();
+                }
+            }
+            for (int i = Math.max(parentSize, 1); i < size; ) {
+                PoolEntry cpi = myEntries[i - parentSize];
+                map.put(cpi.hashCode(), cpi.index());
+                i += cpi.width();
+            }
+        }
+        return map;
+    }
+
+    private void fullScan() {
+        for (int i=1; i<parentSize;) {
+            PoolEntry cpi = parent.entryByIndex(i);
+            map.put(cpi.hashCode(), cpi.index());
+            i += cpi.width();
+        }
+        doneFullScan = true;
+    }
+
+    private EntryMap<BootstrapMethodEntryImpl> bsmMap() {
+        if (bsmMap == null) {
+            bsmMap = new EntryMap<>(Math.max(bsmSize, 16), .75f) {
+                @Override
+                protected BootstrapMethodEntryImpl fetchElement(int index) {
+                    return bootstrapMethodEntry(index);
+                }
+            };
+            for (int i=0; i<parentBsmSize; i++) {
+                BootstrapMethodEntryImpl bsm = parent.bootstrapMethodEntry(i);
+                bsmMap.put(bsm.hash, bsm.index);
+            }
+            for (int i = parentBsmSize; i < bsmSize; ++i) {
+                BootstrapMethodEntryImpl bsm = myBsmEntries[i - parentBsmSize];
+                bsmMap.put(bsm.hash, bsm.index);
+            }
+        }
+        return bsmMap;
+    }
+
+    private <E extends PoolEntry> E internalAdd(E cpi) {
+        return internalAdd(cpi, cpi.hashCode());
+    }
+
+    private <E extends PoolEntry> E internalAdd(E cpi, int hash) {
+        int newIndex = size-parentSize;
+        if (newIndex + 2 > myEntries.length) {
+            myEntries = Arrays.copyOf(myEntries, 2 * newIndex, PoolEntry[].class);
+        }
+        myEntries[newIndex] = cpi;
+        size += cpi.width();
+        map().put(hash, cpi.index());
+        return cpi;
+    }
+
+    private BootstrapMethodEntryImpl internalAdd(BootstrapMethodEntryImpl bsm, int hash) {
+        int newIndex = bsmSize-parentBsmSize;
+        if (newIndex + 2 > myBsmEntries.length) {
+            myBsmEntries = Arrays.copyOf(myBsmEntries, 2 * newIndex, BootstrapMethodEntryImpl[].class);
+        }
+        myBsmEntries[newIndex] = bsm;
+        bsmSize += 1;
+        bsmMap().put(hash, bsm.index);
+        return bsm;
+    }
+
+    private <T extends ConstantDesc> PoolEntry findPrimitiveEntry(int tag, T val) {
+        int hash = AbstractPoolEntry.hash1(tag, val.hashCode());
+        EntryMap<PoolEntry> map = map();
+        for (int token = map.firstToken(hash); token != -1; token = map.nextToken(hash, token)) {
+            PoolEntry e = map.getElementByToken(token);
+            if (e.tag() == tag
+                && e instanceof AbstractPoolEntry.PrimitiveEntry<?> ce
+                && ce.value().equals(val))
+                return e;
+        }
+        if (!doneFullScan) {
+            fullScan();
+            return findPrimitiveEntry(tag, val);
+        }
+        return null;
+    }
+
+    private<T extends AbstractPoolEntry> AbstractPoolEntry findEntry(int tag, T ref1) {
+        // invariant: canWriteDirect(ref1.constantPool())
+        int hash = AbstractPoolEntry.hash1(tag, ref1.index());
+        EntryMap<PoolEntry> map = map();
+        for (int token = map.firstToken(hash); token != -1; token = map.nextToken(hash, token)) {
+            PoolEntry e = map.getElementByToken(token);
+            if (e.tag() == tag
+                && e instanceof AbstractPoolEntry.AbstractRefEntry<?> re
+                && re.ref1 == ref1)
+                return re;
+        }
+        if (!doneFullScan) {
+            fullScan();
+            return findEntry(tag, ref1);
+        }
+        return null;
+    }
+
+    private <T extends AbstractPoolEntry, U extends AbstractPoolEntry>
+            AbstractPoolEntry findEntry(int tag, T ref1, U ref2) {
+        // invariant: canWriteDirect(ref1.constantPool()), canWriteDirect(ref2.constantPool())
+        int hash = AbstractPoolEntry.hash2(tag, ref1.index(), ref2.index());
+        EntryMap<PoolEntry> map = map();
+        for (int token = map.firstToken(hash); token != -1; token = map.nextToken(hash, token)) {
+            PoolEntry e = map.getElementByToken(token);
+            if (e.tag() == tag
+                    && e instanceof AbstractPoolEntry.AbstractRefsEntry<?, ?> re
+                    && re.ref1 == ref1
+                    && re.ref2 == ref2) {
+                return re;
+            }
+        }
+        if (!doneFullScan) {
+            fullScan();
+            return findEntry(tag, ref1, ref2);
+        }
+        return null;
+    }
+
+    private AbstractPoolEntry.Utf8EntryImpl tryFindUtf8(int hash, String target) {
+        EntryMap<PoolEntry> map = map();
+        for (int token = map.firstToken(hash); token != -1;
+             token = map.nextToken(hash, token)) {
+            PoolEntry e = map.getElementByToken(token);
+            if (e.tag() == ClassFile.TAG_UTF8
+                && e instanceof AbstractPoolEntry.Utf8EntryImpl ce
+                && ce.hashCode() == hash
+                && target.equals(ce.stringValue()))
+                return ce;
+        }
+        if (!doneFullScan) {
+            fullScan();
+            return tryFindUtf8(hash, target);
+        }
+        return null;
+    }
+
+    private AbstractPoolEntry.Utf8EntryImpl tryFindUtf8(int hash, AbstractPoolEntry.Utf8EntryImpl target) {
+        EntryMap<PoolEntry> map = map();
+        for (int token = map.firstToken(hash); token != -1; token = map.nextToken(hash, token)) {
+            PoolEntry e = map.getElementByToken(token);
+            if (e.tag() == ClassFile.TAG_UTF8
+                && e instanceof AbstractPoolEntry.Utf8EntryImpl ce
+                && target.equalsUtf8(ce))
+                return ce;
+        }
+        if (!doneFullScan) {
+            fullScan();
+            return tryFindUtf8(hash, target);
+        }
+        return null;
+    }
+
+    @Override
+    public AbstractPoolEntry.Utf8EntryImpl utf8Entry(String s) {
+        int hash = AbstractPoolEntry.hashString(s.hashCode());
+        var ce = tryFindUtf8(hash, s);
+        return ce == null ? internalAdd(new AbstractPoolEntry.Utf8EntryImpl(this, size, s, hash)) : ce;
+    }
+
+    AbstractPoolEntry.Utf8EntryImpl maybeCloneUtf8Entry(Utf8Entry entry) {
+        AbstractPoolEntry.Utf8EntryImpl e = (AbstractPoolEntry.Utf8EntryImpl) entry;
+        if (e.constantPool == this || e.constantPool == parent)
+            return e;
+        AbstractPoolEntry.Utf8EntryImpl ce = tryFindUtf8(e.hashCode(), e);
+        return ce == null ? internalAdd(new AbstractPoolEntry.Utf8EntryImpl(this, size, e)) : ce;
+    }
+
+    @Override
+    public AbstractPoolEntry.ClassEntryImpl classEntry(Utf8Entry nameEntry) {
+        AbstractPoolEntry.Utf8EntryImpl ne = maybeCloneUtf8Entry(nameEntry);
+        var e = (AbstractPoolEntry.ClassEntryImpl) findEntry(TAG_CLASS, ne);
+        return e == null ? internalAdd(new AbstractPoolEntry.ClassEntryImpl(this, size, ne)) : e;
+    }
+
+    @Override
+    public PackageEntry packageEntry(Utf8Entry nameEntry) {
+        AbstractPoolEntry.Utf8EntryImpl ne = maybeCloneUtf8Entry(nameEntry);
+        var e = (AbstractPoolEntry.PackageEntryImpl) findEntry(TAG_PACKAGE, ne);
+        return e == null ? internalAdd(new AbstractPoolEntry.PackageEntryImpl(this, size, ne)) : e;
+    }
+
+    @Override
+    public ModuleEntry moduleEntry(Utf8Entry nameEntry) {
+        AbstractPoolEntry.Utf8EntryImpl ne = maybeCloneUtf8Entry(nameEntry);
+        var e = (AbstractPoolEntry.ModuleEntryImpl) findEntry(TAG_MODULE, ne);
+        return e == null ? internalAdd(new AbstractPoolEntry.ModuleEntryImpl(this, size, ne)) : e;
+    }
+
+    @Override
+    public AbstractPoolEntry.NameAndTypeEntryImpl nameAndTypeEntry(Utf8Entry nameEntry, Utf8Entry typeEntry) {
+        AbstractPoolEntry.Utf8EntryImpl ne = maybeCloneUtf8Entry(nameEntry);
+        AbstractPoolEntry.Utf8EntryImpl te = maybeCloneUtf8Entry(typeEntry);
+        var e = (AbstractPoolEntry.NameAndTypeEntryImpl) findEntry(TAG_NAMEANDTYPE, ne, te);
+        return e == null ? internalAdd(new AbstractPoolEntry.NameAndTypeEntryImpl(this, size, ne, te)) : e;
+    }
+
+    @Override
+    public FieldRefEntry fieldRefEntry(ClassEntry owner, NameAndTypeEntry nameAndType) {
+        AbstractPoolEntry.ClassEntryImpl oe = (AbstractPoolEntry.ClassEntryImpl) owner;
+        AbstractPoolEntry.NameAndTypeEntryImpl ne = (AbstractPoolEntry.NameAndTypeEntryImpl) nameAndType;
+        if (!canWriteDirect(oe.constantPool))
+            oe = classEntry(owner.name());
+        if (!canWriteDirect(ne.constantPool))
+            ne = nameAndTypeEntry(nameAndType.name(), nameAndType.type());
+        var e = (AbstractPoolEntry.FieldRefEntryImpl) findEntry(TAG_FIELDREF, oe, ne);
+        return e == null ? internalAdd(new AbstractPoolEntry.FieldRefEntryImpl(this, size, oe, ne)) : e;
+    }
+
+    @Override
+    public MethodRefEntry methodRefEntry(ClassEntry owner, NameAndTypeEntry nameAndType) {
+        AbstractPoolEntry.ClassEntryImpl oe = (AbstractPoolEntry.ClassEntryImpl) owner;
+        AbstractPoolEntry.NameAndTypeEntryImpl ne = (AbstractPoolEntry.NameAndTypeEntryImpl) nameAndType;
+        if (!canWriteDirect(oe.constantPool))
+            oe = classEntry(owner.name());
+        if (!canWriteDirect(ne.constantPool))
+            ne = nameAndTypeEntry(nameAndType.name(), nameAndType.type());
+        var e = (AbstractPoolEntry.MethodRefEntryImpl) findEntry(TAG_METHODREF, oe, ne);
+        return e == null ? internalAdd(new AbstractPoolEntry.MethodRefEntryImpl(this, size, oe, ne)) : e;
+    }
+
+    @Override
+    public InterfaceMethodRefEntry interfaceMethodRefEntry(ClassEntry owner, NameAndTypeEntry nameAndType) {
+        AbstractPoolEntry.ClassEntryImpl oe = (AbstractPoolEntry.ClassEntryImpl) owner;
+        AbstractPoolEntry.NameAndTypeEntryImpl ne = (AbstractPoolEntry.NameAndTypeEntryImpl) nameAndType;
+        if (!canWriteDirect(oe.constantPool))
+            oe = classEntry(owner.name());
+        if (!canWriteDirect(ne.constantPool))
+            ne = nameAndTypeEntry(nameAndType.name(), nameAndType.type());
+        var e = (AbstractPoolEntry.InterfaceMethodRefEntryImpl) findEntry(TAG_INTERFACEMETHODREF, oe, ne);
+        return e == null ? internalAdd(new AbstractPoolEntry.InterfaceMethodRefEntryImpl(this, size, oe, ne)) : e;
+    }
+
+    @Override
+    public MethodTypeEntry methodTypeEntry(MethodTypeDesc descriptor) {
+        var ret = (AbstractPoolEntry.MethodTypeEntryImpl)methodTypeEntry(utf8Entry(descriptor.descriptorString()));
+        ret.sym = descriptor;
+        return ret;
+    }
+
+    @Override
+    public MethodTypeEntry methodTypeEntry(Utf8Entry descriptor) {
+        AbstractPoolEntry.Utf8EntryImpl de = maybeCloneUtf8Entry(descriptor);
+        var e = (AbstractPoolEntry.MethodTypeEntryImpl) findEntry(TAG_METHODTYPE, de);
+        return e == null ? internalAdd(new AbstractPoolEntry.MethodTypeEntryImpl(this, size, de)) : e;
+    }
+
+    @Override
+    public MethodHandleEntry methodHandleEntry(int refKind, MemberRefEntry reference) {
+        if (!canWriteDirect(reference.constantPool())) {
+            reference = switch (reference.tag()) {
+                case TAG_FIELDREF -> fieldRefEntry(reference.owner(), reference.nameAndType());
+                case TAG_METHODREF -> methodRefEntry(reference.owner(), reference.nameAndType());
+                case TAG_INTERFACEMETHODREF -> interfaceMethodRefEntry(reference.owner(), reference.nameAndType());
+                default -> throw new IllegalArgumentException(String.format("Bad tag %d", reference.tag()));
+            };
+        }
+
+        int hash = AbstractPoolEntry.hash2(TAG_METHODHANDLE, refKind, reference.index());
+        EntryMap<PoolEntry> map1 = map();
+        for (int token = map1.firstToken(hash); token != -1; token = map1.nextToken(hash, token)) {
+            PoolEntry e = map1.getElementByToken(token);
+            if (e.tag() == TAG_METHODHANDLE
+                && e instanceof AbstractPoolEntry.MethodHandleEntryImpl ce
+                && ce.kind() == refKind && ce.reference() == reference)
+                return ce;
+        }
+        if (!doneFullScan) {
+            fullScan();
+            return methodHandleEntry(refKind, reference);
+        }
+        return internalAdd(new AbstractPoolEntry.MethodHandleEntryImpl(this, size,
+                hash, refKind, (AbstractPoolEntry.AbstractMemberRefEntry) reference), hash);
+    }
+
+    @Override
+    public InvokeDynamicEntry invokeDynamicEntry(BootstrapMethodEntry bootstrapMethodEntry,
+                                                 NameAndTypeEntry nameAndType) {
+        if (!canWriteDirect(bootstrapMethodEntry.constantPool()))
+            bootstrapMethodEntry = bsmEntry(bootstrapMethodEntry.bootstrapMethod(),
+                                            bootstrapMethodEntry.arguments());
+        if (!canWriteDirect(nameAndType.constantPool()))
+            nameAndType = nameAndTypeEntry(nameAndType.name(), nameAndType.type());
+        int hash = AbstractPoolEntry.hash2(TAG_INVOKEDYNAMIC,
+                bootstrapMethodEntry.bsmIndex(), nameAndType.index());
+        EntryMap<PoolEntry> map1 = map();
+        for (int token = map1.firstToken(hash); token != -1; token = map1.nextToken(hash, token)) {
+            PoolEntry e = map1.getElementByToken(token);
+            if (e.tag() == TAG_INVOKEDYNAMIC
+                && e instanceof AbstractPoolEntry.InvokeDynamicEntryImpl ce
+                && ce.bootstrap() == bootstrapMethodEntry && ce.nameAndType() == nameAndType)
+                return ce;
+        }
+        if (!doneFullScan) {
+            fullScan();
+            return invokeDynamicEntry(bootstrapMethodEntry, nameAndType);
+        }
+
+        AbstractPoolEntry.InvokeDynamicEntryImpl ce =
+                new AbstractPoolEntry.InvokeDynamicEntryImpl(this, size, hash,
+                        (BootstrapMethodEntryImpl) bootstrapMethodEntry,
+                        (AbstractPoolEntry.NameAndTypeEntryImpl) nameAndType);
+        internalAdd(ce, hash);
+        return ce;
+    }
+
+    @Override
+    public ConstantDynamicEntry constantDynamicEntry(BootstrapMethodEntry bootstrapMethodEntry,
+                                                     NameAndTypeEntry nameAndType) {
+        if (!canWriteDirect(bootstrapMethodEntry.constantPool()))
+            bootstrapMethodEntry = bsmEntry(bootstrapMethodEntry.bootstrapMethod(),
+                                            bootstrapMethodEntry.arguments());
+        if (!canWriteDirect(nameAndType.constantPool()))
+            nameAndType = nameAndTypeEntry(nameAndType.name(), nameAndType.type());
+        int hash = AbstractPoolEntry.hash2(TAG_CONSTANTDYNAMIC,
+                bootstrapMethodEntry.bsmIndex(), nameAndType.index());
+        EntryMap<PoolEntry> map1 = map();
+        for (int token = map1.firstToken(hash); token != -1; token = map1.nextToken(hash, token)) {
+            PoolEntry e = map1.getElementByToken(token);
+            if (e.tag() == TAG_CONSTANTDYNAMIC
+                && e instanceof AbstractPoolEntry.ConstantDynamicEntryImpl ce
+                && ce.bootstrap() == bootstrapMethodEntry && ce.nameAndType() == nameAndType)
+                return ce;
+        }
+        if (!doneFullScan) {
+            fullScan();
+            return constantDynamicEntry(bootstrapMethodEntry, nameAndType);
+        }
+
+        AbstractPoolEntry.ConstantDynamicEntryImpl ce =
+                new AbstractPoolEntry.ConstantDynamicEntryImpl(this, size, hash,
+                        (BootstrapMethodEntryImpl) bootstrapMethodEntry,
+                        (AbstractPoolEntry.NameAndTypeEntryImpl) nameAndType);
+        internalAdd(ce, hash);
+        return ce;
+    }
+
+    @Override
+    public IntegerEntry intEntry(int value) {
+        var e = (IntegerEntry) findPrimitiveEntry(TAG_INTEGER, value);
+        return e == null ? internalAdd(new AbstractPoolEntry.IntegerEntryImpl(this, size, value)) : e;
+    }
+
+    @Override
+    public FloatEntry floatEntry(float value) {
+        var e = (FloatEntry) findPrimitiveEntry(TAG_FLOAT, value);
+        return e == null ? internalAdd(new AbstractPoolEntry.FloatEntryImpl(this, size, value)) : e;
+    }
+
+    @Override
+    public LongEntry longEntry(long value) {
+        var e = (LongEntry) findPrimitiveEntry(TAG_LONG, value);
+        return e == null ? internalAdd(new AbstractPoolEntry.LongEntryImpl(this, size, value)) : e;
+    }
+
+    @Override
+    public DoubleEntry doubleEntry(double value) {
+        var e = (DoubleEntry) findPrimitiveEntry(TAG_DOUBLE, value);
+        return e == null ? internalAdd(new AbstractPoolEntry.DoubleEntryImpl(this, size, value)) : e;
+    }
+
+    @Override
+    public StringEntry stringEntry(Utf8Entry utf8) {
+        AbstractPoolEntry.Utf8EntryImpl ue = maybeCloneUtf8Entry(utf8);
+        var e = (AbstractPoolEntry.StringEntryImpl) findEntry(TAG_STRING, ue);
+        return e == null ? internalAdd(new AbstractPoolEntry.StringEntryImpl(this, size, ue)) : e;
+    }
+
+    @Override
+    public BootstrapMethodEntry bsmEntry(MethodHandleEntry methodReference,
+                                         List<LoadableConstantEntry> arguments) {
+        if (!canWriteDirect(methodReference.constantPool()))
+            methodReference = methodHandleEntry(methodReference.kind(), methodReference.reference());
+        for (LoadableConstantEntry a : arguments) {
+            if (!canWriteDirect(a.constantPool())) {
+                // copy args list
+                LoadableConstantEntry[] arr = arguments.toArray(new LoadableConstantEntry[0]);
+                for (int i = 0; i < arr.length; i++)
+                    arr[i] = AbstractPoolEntry.maybeClone(this, arr[i]);
+                arguments = List.of(arr);
+
+                break;
+            }
+        }
+        AbstractPoolEntry.MethodHandleEntryImpl mre = (AbstractPoolEntry.MethodHandleEntryImpl) methodReference;
+        int hash = BootstrapMethodEntryImpl.computeHashCode(mre, arguments);
+        EntryMap<BootstrapMethodEntryImpl> map = bsmMap();
+        for (int token = map.firstToken(hash); token != -1; token = map.nextToken(hash, token)) {
+            BootstrapMethodEntryImpl e = map.getElementByToken(token);
+            if (e.bootstrapMethod() == mre && e.arguments().equals(arguments)) {
+                return e;
+            }
+        }
+        BootstrapMethodEntryImpl ne = new BootstrapMethodEntryImpl(this, bsmSize, hash, mre, arguments);
+        return internalAdd(ne, hash);
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/classfile/impl/StackCounter$Target.class b/tests/test_data/std/jdk/internal/classfile/impl/StackCounter$Target.class
new file mode 100644
index 0000000000000000000000000000000000000000..da09c223c5cca3a97bf6348ea3301a640e9b41fd
GIT binary patch
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literal 0
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diff --git a/tests/test_data/std/jdk/internal/classfile/impl/StackCounter.class b/tests/test_data/std/jdk/internal/classfile/impl/StackCounter.class
new file mode 100644
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zgr@@F3;9Rrq5j6NLM%`5)BL>E`!T=BKjoj{-C&Tl5bu7D-Y)(H|B8zF*ZeNON5%gK
DEye}1

literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/classfile/impl/StackCounter.java b/tests/test_data/std/jdk/internal/classfile/impl/StackCounter.java
new file mode 100644
index 00000000..899a4357
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/classfile/impl/StackCounter.java
@@ -0,0 +1,386 @@
+/*
+ * Copyright (c) 2023, 2024, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ *
+ */
+package jdk.internal.classfile.impl;
+
+import java.lang.classfile.TypeKind;
+import java.lang.classfile.constantpool.ConstantDynamicEntry;
+import java.lang.classfile.constantpool.DynamicConstantPoolEntry;
+import java.lang.classfile.constantpool.MemberRefEntry;
+import java.lang.constant.MethodTypeDesc;
+import java.nio.ByteBuffer;
+import java.util.ArrayDeque;
+import java.util.BitSet;
+import java.util.List;
+import java.util.Queue;
+
+import static java.lang.classfile.ClassFile.*;
+import java.lang.constant.ClassDesc;
+import java.util.stream.Collectors;
+
+public final class StackCounter {
+
+    private record Target(int bci, int stack) {}
+
+    static StackCounter of(DirectCodeBuilder dcb, BufWriterImpl buf) {
+        return new StackCounter(
+                dcb,
+                buf.thisClass().asSymbol(),
+                dcb.methodInfo.methodName().stringValue(),
+                dcb.methodInfo.methodTypeSymbol(),
+                (dcb.methodInfo.methodFlags() & ACC_STATIC) != 0,
+                ((BufWriterImpl) dcb.bytecodesBufWriter).asByteBuffer(),
+                dcb.constantPool,
+                dcb.handlers);
+    }
+
+    private int stack, maxStack, maxLocals, rets;
+
+    private final RawBytecodeHelper bcs;
+    private final ClassDesc thisClass;
+    private final String methodName;
+    private final MethodTypeDesc methodDesc;
+    private final boolean isStatic;
+    private final ByteBuffer bytecode;
+    private final SplitConstantPool cp;
+    private final Queue<Target> targets;
+    private final BitSet visited;
+
+    private void jump(int targetBci) {
+        if (!visited.get(targetBci)) {
+            targets.add(new Target(targetBci, stack));
+        }
+    }
+
+    private void addStackSlot(int delta) {
+        stack += delta;
+        if (stack > maxStack) maxStack = stack;
+    }
+
+    private void ensureLocalSlot(int index) {
+        if (index >= maxLocals) maxLocals = index + 1;
+    }
+
+    private boolean next() {
+        Target en;
+        while ((en = targets.poll()) != null) {
+            if (!visited.get(en.bci)) {
+                bcs.nextBci = en.bci;
+                stack = en.stack;
+                return true;
+            }
+        }
+        bcs.nextBci = bcs.endBci;
+        return false;
+    }
+
+    public StackCounter(LabelContext labelContext,
+                     ClassDesc thisClass,
+                     String methodName,
+                     MethodTypeDesc methodDesc,
+                     boolean isStatic,
+                     ByteBuffer bytecode,
+                     SplitConstantPool cp,
+                     List<AbstractPseudoInstruction.ExceptionCatchImpl> handlers) {
+        this.thisClass = thisClass;
+        this.methodName = methodName;
+        this.methodDesc = methodDesc;
+        this.isStatic = isStatic;
+        this.bytecode = bytecode;
+        this.cp = cp;
+        targets = new ArrayDeque<>();
+        maxStack = stack = rets = 0;
+        for (var h : handlers) targets.add(new Target(labelContext.labelToBci(h.handler), 1));
+        maxLocals = isStatic ? 0 : 1;
+        maxLocals += Util.parameterSlots(methodDesc);
+        bcs = new RawBytecodeHelper(bytecode);
+        visited = new BitSet(bcs.endBci);
+        targets.add(new Target(0, 0));
+        while (next()) {
+            while (!bcs.isLastBytecode()) {
+                bcs.rawNext();
+                int opcode = bcs.rawCode;
+                int bci = bcs.bci;
+                visited.set(bci);
+                switch (opcode) {
+                    case NOP, LALOAD, DALOAD, SWAP, INEG, ARRAYLENGTH, INSTANCEOF, LNEG, FNEG, DNEG, I2F, L2D, F2I, D2L, I2B, I2C, I2S,
+                         NEWARRAY, CHECKCAST, ANEWARRAY -> {}
+                    case RETURN ->
+                        next();
+                    case ACONST_NULL, ICONST_M1, ICONST_0, ICONST_1, ICONST_2, ICONST_3, ICONST_4, ICONST_5, SIPUSH, BIPUSH,
+                         FCONST_0, FCONST_1, FCONST_2, DUP, DUP_X1, DUP_X2, I2L, I2D, F2L, F2D, NEW ->
+                        addStackSlot(+1);
+                    case LCONST_0, LCONST_1, DCONST_0, DCONST_1, DUP2, DUP2_X1, DUP2_X2 ->
+                        addStackSlot(+2);
+                    case POP, MONITORENTER, MONITOREXIT, IADD, ISUB, IMUL, IDIV, IREM, ISHL, ISHR, IUSHR, IOR, IXOR, IAND,
+                         LSHL, LSHR, LUSHR, FADD, FSUB, FMUL, FDIV, FREM, L2I, L2F, D2F, FCMPL, FCMPG, D2I ->
+                        addStackSlot(-1);
+                    case POP2, LADD, LSUB, LMUL, LDIV, LREM, LAND, LOR, LXOR, DADD, DSUB, DMUL, DDIV, DREM ->
+                        addStackSlot(-2);
+                    case IASTORE, BASTORE, CASTORE, SASTORE, FASTORE, AASTORE, LCMP, DCMPL, DCMPG ->
+                        addStackSlot(-3);
+                    case LASTORE, DASTORE ->
+                        addStackSlot(-4);
+                    case LDC ->
+                        processLdc(bcs.getIndexU1());
+                    case LDC_W, LDC2_W ->
+                        processLdc(bcs.getIndexU2());
+                    case ILOAD, FLOAD, ALOAD -> {
+                        ensureLocalSlot(bcs.getIndex());
+                        addStackSlot(+1);
+                    }
+                    case LLOAD, DLOAD -> {
+                        ensureLocalSlot(bcs.getIndex() + 1);
+                        addStackSlot(+2);
+                    }
+                    case ILOAD_0, FLOAD_0, ALOAD_0 -> {
+                        ensureLocalSlot(0);
+                        addStackSlot(+1);
+                    }
+                    case ILOAD_1, FLOAD_1, ALOAD_1 -> {
+                        ensureLocalSlot(1);
+                        addStackSlot(+1);
+                    }
+                    case ILOAD_2, FLOAD_2, ALOAD_2 -> {
+                        ensureLocalSlot(2);
+                        addStackSlot(+1);
+                    }
+                    case ILOAD_3, FLOAD_3, ALOAD_3 -> {
+                        ensureLocalSlot(3);
+                        addStackSlot(+1);
+                    }
+                    case LLOAD_0, DLOAD_0 -> {
+                        ensureLocalSlot(1);
+                        addStackSlot(+2);
+                    }
+                    case LLOAD_1, DLOAD_1 -> {
+                        ensureLocalSlot(2);
+                        addStackSlot(+2);
+                    }
+                    case LLOAD_2, DLOAD_2 -> {
+                        ensureLocalSlot(3);
+                        addStackSlot(+2);
+                    }
+                    case LLOAD_3, DLOAD_3 -> {
+                        ensureLocalSlot(4);
+                        addStackSlot(+2);
+                    }
+                    case IALOAD, BALOAD, CALOAD, SALOAD, FALOAD, AALOAD ->  {
+                        addStackSlot(-1);
+                    }
+                    case ISTORE, FSTORE, ASTORE -> {
+                        ensureLocalSlot(bcs.getIndex());
+                        addStackSlot(-1);
+                    }
+                    case LSTORE, DSTORE -> {
+                        ensureLocalSlot(bcs.getIndex() + 1);
+                        addStackSlot(-2);
+                    }
+                    case ISTORE_0, FSTORE_0, ASTORE_0 -> {
+                        ensureLocalSlot(0);
+                        addStackSlot(-1);
+                    }
+                    case ISTORE_1, FSTORE_1, ASTORE_1 -> {
+                        ensureLocalSlot(1);
+                        addStackSlot(-1);
+                    }
+                    case ISTORE_2, FSTORE_2, ASTORE_2 -> {
+                        ensureLocalSlot(2);
+                        addStackSlot(-1);
+                    }
+                    case ISTORE_3, FSTORE_3, ASTORE_3 -> {
+                        ensureLocalSlot(3);
+                        addStackSlot(-1);
+                    }
+                    case LSTORE_0, DSTORE_0 -> {
+                        ensureLocalSlot(1);
+                        addStackSlot(-2);
+                    }
+                    case LSTORE_1, DSTORE_1 -> {
+                        ensureLocalSlot(2);
+                        addStackSlot(-2);
+                    }
+                    case LSTORE_2, DSTORE_2 -> {
+                        ensureLocalSlot(3);
+                        addStackSlot(-2);
+                    }
+                    case LSTORE_3, DSTORE_3 -> {
+                        ensureLocalSlot(4);
+                        addStackSlot(-2);
+                    }
+                    case IINC ->
+                        ensureLocalSlot(bcs.getIndex());
+                    case IF_ICMPEQ, IF_ICMPNE, IF_ICMPLT, IF_ICMPGE, IF_ICMPGT, IF_ICMPLE, IF_ACMPEQ, IF_ACMPNE -> {
+                        addStackSlot(-2);
+                        jump(bcs.dest());
+                    }
+                    case IFEQ, IFNE, IFLT, IFGE, IFGT, IFLE, IFNULL, IFNONNULL -> {
+                        addStackSlot(-1);
+                        jump(bcs.dest());
+                    }
+                    case GOTO -> {
+                        jump(bcs.dest());
+                        next();
+                    }
+                    case GOTO_W -> {
+                        jump(bcs.destW());
+                        next();
+                    }
+                    case TABLESWITCH, LOOKUPSWITCH -> {
+                        int alignedBci = RawBytecodeHelper.align(bci + 1);
+                        int defaultOfset = bcs.getInt(alignedBci);
+                        int keys, delta;
+                        addStackSlot(-1);
+                        if (bcs.rawCode == TABLESWITCH) {
+                            int low = bcs.getInt(alignedBci + 4);
+                            int high = bcs.getInt(alignedBci + 2 * 4);
+                            if (low > high) {
+                                throw error("low must be less than or equal to high in tableswitch");
+                            }
+                            keys = high - low + 1;
+                            if (keys < 0) {
+                                throw error("too many keys in tableswitch");
+                            }
+                            delta = 1;
+                        } else {
+                            keys = bcs.getInt(alignedBci + 4);
+                            if (keys < 0) {
+                                throw error("number of keys in lookupswitch less than 0");
+                            }
+                            delta = 2;
+                            for (int i = 0; i < (keys - 1); i++) {
+                                int this_key = bcs.getInt(alignedBci + (2 + 2 * i) * 4);
+                                int next_key = bcs.getInt(alignedBci + (2 + 2 * i + 2) * 4);
+                                if (this_key >= next_key) {
+                                    throw error("Bad lookupswitch instruction");
+                                }
+                            }
+                        }
+                        int target = bci + defaultOfset;
+                        jump(target);
+                        for (int i = 0; i < keys; i++) {
+                            alignedBci = RawBytecodeHelper.align(bcs.bci + 1);
+                            target = bci + bcs.getInt(alignedBci + (3 + i * delta) * 4);
+                            jump(target);
+                        }
+                        next();
+                    }
+                    case LRETURN, DRETURN -> {
+                        addStackSlot(-2);
+                        next();
+                    }
+                    case IRETURN, FRETURN, ARETURN, ATHROW -> {
+                        addStackSlot(-1);
+                        next();
+                    }
+                    case GETSTATIC, PUTSTATIC, GETFIELD, PUTFIELD -> {
+                        var tk = TypeKind.fromDescriptor(cp.entryByIndex(bcs.getIndexU2(), MemberRefEntry.class).nameAndType().type());
+                        switch (bcs.rawCode) {
+                            case GETSTATIC ->
+                                addStackSlot(tk.slotSize());
+                            case PUTSTATIC ->
+                                addStackSlot(-tk.slotSize());
+                            case GETFIELD ->
+                                addStackSlot(tk.slotSize() - 1);
+                            case PUTFIELD ->
+                                addStackSlot(-tk.slotSize() - 1);
+                            default -> throw new AssertionError("Should not reach here");
+                        }
+                    }
+                    case INVOKEVIRTUAL, INVOKESPECIAL, INVOKESTATIC, INVOKEINTERFACE, INVOKEDYNAMIC -> {
+                        var cpe = cp.entryByIndex(bcs.getIndexU2());
+                        var nameAndType = opcode == INVOKEDYNAMIC ? ((DynamicConstantPoolEntry)cpe).nameAndType() : ((MemberRefEntry)cpe).nameAndType();
+                        var mtd = Util.methodTypeSymbol(nameAndType);
+                        addStackSlot(Util.slotSize(mtd.returnType()) - Util.parameterSlots(mtd));
+                        if (opcode != INVOKESTATIC && opcode != INVOKEDYNAMIC) {
+                            addStackSlot(-1);
+                        }
+                    }
+                    case MULTIANEWARRAY ->
+                        addStackSlot (1 - bcs.getU1(bcs.bci + 3));
+                    case JSR -> {
+                        addStackSlot(+1);
+                        jump(bcs.dest()); //here we lost track of the exact stack size after return from subroutine
+                        addStackSlot(-1);
+                    }
+                    case JSR_W -> {
+                        addStackSlot(+1);
+                        jump(bcs.destW()); //here we lost track of the exact stack size after return from subroutine
+                        addStackSlot(-1);
+                    }
+                    case RET -> {
+                        ensureLocalSlot(bcs.getIndex());
+                        rets++; //subroutines must be counted for later maxStack correction
+                        next();
+                    }
+                    default ->
+                        throw error(String.format("Bad instruction: %02x", opcode));
+                }
+            }
+        }
+        //correction of maxStack when subroutines are present by calculation of upper bounds
+        //the worst scenario is that all subroutines are chained and each subroutine also requires maxStack for its own code
+        maxStack += rets * maxStack;
+    }
+
+    /**
+     * Calculated maximum number of the locals required
+     * @return maximum number of the locals required
+     */
+    public int maxLocals() {
+        return maxLocals;
+    }
+
+    /**
+     * Calculated maximum stack size required
+     * @return maximum stack size required
+     */
+    public int maxStack() {
+        return maxStack;
+    }
+
+    private void processLdc(int index) {
+        switch (cp.entryByIndex(index).tag()) {
+            case TAG_UTF8, TAG_STRING, TAG_CLASS, TAG_INTEGER, TAG_FLOAT, TAG_METHODHANDLE, TAG_METHODTYPE ->
+                addStackSlot(+1);
+            case TAG_DOUBLE, TAG_LONG ->
+                addStackSlot(+2);
+            case TAG_CONSTANTDYNAMIC ->
+                addStackSlot(cp.entryByIndex(index, ConstantDynamicEntry.class).typeKind().slotSize());
+            default ->
+                throw error("CP entry #%d %s is not loadable constant".formatted(index, cp.entryByIndex(index).tag()));
+        }
+    }
+
+    private IllegalArgumentException error(String msg) {
+        var sb = new StringBuilder("%s at bytecode offset %d of method %s(%s)".formatted(
+                msg,
+                bcs.bci,
+                methodName,
+                methodDesc.parameterList().stream().map(ClassDesc::displayName).collect(Collectors.joining(","))));
+        Util.dumpMethod(cp, thisClass, methodName, methodDesc, isStatic ? ACC_STATIC : 0, bytecode, sb::append);
+        return new IllegalArgumentException(sb.toString());
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/classfile/impl/StackMapDecoder$ObjectVerificationTypeInfoImpl.class b/tests/test_data/std/jdk/internal/classfile/impl/StackMapDecoder$ObjectVerificationTypeInfoImpl.class
new file mode 100644
index 0000000000000000000000000000000000000000..f807c5bc3f1c219dfb8e891b9546c02bcd7c8182
GIT binary patch
literal 1715
zcmb_cOHUL*5dL~!vpWs~D-T6c)))H_7ZpWa!~;rPv!D?}BA%M1VF!m9ob5H?r}zgv
zanM8~nrQUuukqkPjWJfw47&pYYT{w0x@W4ss_(1n{`B+hdjJ!-t|7wEzs#TTqQ&i{
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zxV^masA$?!xHh*!@aD>@Rh*H$`e=%;-XNd_;hwxRzbvY9R=DP(S>@7n?E7o0qHHfZ
zWpZaodF4&>6~Qo6X%*6{y6V_<$!)pnIF?W0rY+sIl8z2^YDgP6fG&nkFSa2~tLW#f
z6ASUU!7W-0W<${a@6zvIa&sDbw#ebTs!RtB96}#Mtj6m#hMw%h9pcOTa0LAtjv6?I
z0fxdq@L|}`>*YXIUyrVAE|g?Ox~9EU(r{e0V2Ac{NgneJDVj}~bV*mG^&V|t7!Hf`
zXWetNq{0L>m!Z94+G4t~GB4cweBPoj>55b3)+~2TwGTeVWX+@|R4V^(a7xssDIsgl
z!d<RN(lAnnsN_rD$d(zp!>odq=jNz%S>uv{IjY!}jDZJ3+vWrZ#V1w6eY#2M_)TCa
zZfVV*MPtxsoQ7K!>i98qZ6*nh$yrqhLvmWw<t?W!HC$HH^Y`bBW_|PM8fDuS?u0t)
zf;2hmGu!P1YPd#hS~|3->@iLZeY>OL99<VNFl6XSt1E-<r39@toInI8X*W(bLRQbe
zMl@e|h13h$MQ|$c1U}<5t$Tbg3?fTA^7qgfa<q<9tH?0qQJ}Yi9U{xfMmw~1GGV+g
z9-iU<4)7RV9A|>i26;y*CX+8bLp-)#_z3+ex(XklPvu`Cb%ve|w68}MaMUX_O(cP@
zMC%&?eWw%u!%H$i{|~^RYO-GWnP&MJoJElm4pUqV5v`Zj=bF`D@k9gKWAD)YAgZ#?
zY@l}=6UIVJ+M7(yV<2EMLRN{OD}XmR%<!CcAuU)UgrGMO+HfI2P$epaxI)+#95luk
oG9CoSFyf`Sh)bRw#TBwi0`Z%Fm3C<=LB}Xcbd6>(hVew|7n{$VPyhe`

literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/classfile/impl/StackMapDecoder$StackMapFrameImpl.class b/tests/test_data/std/jdk/internal/classfile/impl/StackMapDecoder$StackMapFrameImpl.class
new file mode 100644
index 0000000000000000000000000000000000000000..2a246fa535523918daccf98b35ffcbe13de10c59
GIT binary patch
literal 2840
zcmb_eT~ixX7=8}<*no?Wv`_)tYNe8dwrl;?O+kSo(Lig1(WzG_$pIFY-MD+w8UKMl
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zQmmlHo5D7gKtabfTqgnBZE@Qt7eaxqv}~hh`7*dQtK){cmGPBP1@e7P$2=Aoa?-6!
z&vNz|>c!fn{4q-jTSHJ&sk*7-7H*TO1MVNJQ!E(PF0HDnkl)pD2k(*d;+JmV{O)CO
z6CONi9*UMUOV2gjWiW=NflCTqvnxeE*<o^>J(rSOxAq+_yB_)b)0w1H5_;mSj(}Ti
z2+!KHT3lMLqX<(a9p;M3uv)AR1q&&1Mz48xU1~6-!<<ajEJy5gkDJ2V<xQKcF4PpK
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z<-Bl@gb`lc;!fKZ{$kB_kGh@c{RIsss*s6vMuO^jZwSBTSsm$mNs)EcVUimW#?R+L
zlG+Cfb3`Wwz3Mo^3m^qOv3xH_{r;rkDZ@q_hnQ9uEmXvSVf9Nxo#Ae*U_{_F{J?N)
z^i?877-c-9#yAFsMWj(st(tm8K{eK3q<%?f@6&t?OSDg&F|p3kJcA-qDAA4I=uU>l
z`SM?2<%JVy<$EWXEZ;vtzC4#c!OTlKO`%M`S&{@>z%tE04yAAp_i07)ffaO4GiAqE
zFjJPKf|;@*jR!QJ?Vm06&z9)SptF3MU_bz%rVlb4ksBW%Prwh!0A;iql`5@#inoA2
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z2x9&v%wViwg~l?GAf$3g<Utw_l6aNw7s!}RB4rL=VU7OlZs0MtX@8z*l|uzPn8Oo#
OBHw4n@eI3YVD5iEAixa(

literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/classfile/impl/StackMapDecoder$UninitializedVerificationTypeInfoImpl.class b/tests/test_data/std/jdk/internal/classfile/impl/StackMapDecoder$UninitializedVerificationTypeInfoImpl.class
new file mode 100644
index 0000000000000000000000000000000000000000..811a57273215b2774a9e7dbc0fbefa4a9e603153
GIT binary patch
literal 2199
zcmcIlTT|Oc6#f=tOLjyJ&Xt7RT9VkNL`^SgQ&ZXkrMNZD1>%{cPiuR@3qo?Gbu#U5
z%0n`fk{LSFAJ8Aw$yrHQifKtZ(>%cLS)KEpbG~!&pMM?v0bm&q42&^c+~H5S?QnP7
z?l?RMwxlEMWqn(vTLI(98pv5NU@}Z5$`3@x^ScbW1?ft)$dD;lT6q+3!hmIA0`D>0
z-|6n!(pAEDxs!sIdws{=P`tCd&ig9_)D`~hLstVy?#N$7w<UbJB|BV6&)xi`FY4}=
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/classfile/impl/StackMapDecoder.class b/tests/test_data/std/jdk/internal/classfile/impl/StackMapDecoder.class
new file mode 100644
index 0000000000000000000000000000000000000000..934d3fa439a56377d0f8babc8833df061ff1ecff
GIT binary patch
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/classfile/impl/StackMapDecoder.java b/tests/test_data/std/jdk/internal/classfile/impl/StackMapDecoder.java
new file mode 100644
index 00000000..2ea8922d
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/classfile/impl/StackMapDecoder.java
@@ -0,0 +1,289 @@
+/*
+ * Copyright (c) 2022, 2024, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package jdk.internal.classfile.impl;
+
+import java.lang.classfile.BufWriter;
+import java.lang.classfile.ClassReader;
+import java.lang.classfile.Label;
+import java.lang.classfile.MethodModel;
+import java.lang.classfile.attribute.StackMapFrameInfo;
+import java.lang.classfile.attribute.StackMapFrameInfo.*;
+import java.lang.classfile.constantpool.ClassEntry;
+import java.lang.constant.ConstantDescs;
+import java.lang.constant.MethodTypeDesc;
+import java.lang.reflect.AccessFlag;
+import java.util.List;
+import java.util.Objects;
+import java.util.TreeMap;
+
+import static java.lang.classfile.ClassFile.*;
+
+public class StackMapDecoder {
+
+    private static final int
+                    SAME_LOCALS_1_STACK_ITEM_EXTENDED = 247,
+                    SAME_EXTENDED = 251;
+
+    private final ClassReader classReader;
+    private final int pos;
+    private final LabelContext ctx;
+    private final List<VerificationTypeInfo> initFrameLocals;
+    private int p;
+
+    StackMapDecoder(ClassReader classReader, int pos, LabelContext ctx, List<VerificationTypeInfo> initFrameLocals) {
+        this.classReader = classReader;
+        this.pos = pos;
+        this.ctx = ctx;
+        this.initFrameLocals = initFrameLocals;
+    }
+
+    static List<VerificationTypeInfo> initFrameLocals(MethodModel method) {
+        return initFrameLocals(method.parent().orElseThrow().thisClass(),
+                method.methodName().stringValue(),
+                method.methodTypeSymbol(),
+                method.flags().has(AccessFlag.STATIC));
+    }
+
+    public static List<VerificationTypeInfo> initFrameLocals(ClassEntry thisClass, String methodName, MethodTypeDesc methodType, boolean isStatic) {
+        VerificationTypeInfo vtis[];
+        int i = 0;
+        if (!isStatic) {
+            vtis = new VerificationTypeInfo[methodType.parameterCount() + 1];
+            if ("<init>".equals(methodName) && !ConstantDescs.CD_Object.equals(thisClass.asSymbol())) {
+                vtis[i++] = SimpleVerificationTypeInfo.ITEM_UNINITIALIZED_THIS;
+            } else {
+                vtis[i++] = new StackMapDecoder.ObjectVerificationTypeInfoImpl(thisClass);
+            }
+        } else {
+            vtis = new VerificationTypeInfo[methodType.parameterCount()];
+        }
+        for (int pi = 0; pi < methodType.parameterCount(); pi++) {
+            var arg = methodType.parameterType(pi);
+            vtis[i++] = switch (arg.descriptorString().charAt(0)) {
+                case 'I', 'S', 'C' ,'B', 'Z' -> SimpleVerificationTypeInfo.ITEM_INTEGER;
+                case 'J' -> SimpleVerificationTypeInfo.ITEM_LONG;
+                case 'F' -> SimpleVerificationTypeInfo.ITEM_FLOAT;
+                case 'D' -> SimpleVerificationTypeInfo.ITEM_DOUBLE;
+                case 'V' -> throw new IllegalArgumentException("Illegal method argument type: " + arg);
+                default -> new StackMapDecoder.ObjectVerificationTypeInfoImpl(TemporaryConstantPool.INSTANCE.classEntry(arg));
+            };
+        }
+        return List.of(vtis);
+    }
+
+    public static void writeFrames(BufWriter b, List<StackMapFrameInfo> entries) {
+        var buf = (BufWriterImpl)b;
+        var dcb = (DirectCodeBuilder)buf.labelContext();
+        var mi = dcb.methodInfo();
+        var prevLocals = StackMapDecoder.initFrameLocals(buf.thisClass(),
+                mi.methodName().stringValue(),
+                mi.methodTypeSymbol(),
+                (mi.methodFlags() & ACC_STATIC) != 0);
+        int prevOffset = -1;
+        var map = new TreeMap<Integer, StackMapFrameInfo>();
+        //sort by resolved label offsets first to allow unordered entries
+        for (var fr : entries) {
+            map.put(dcb.labelToBci(fr.target()), fr);
+        }
+        b.writeU2(map.size());
+        for (var me : map.entrySet()) {
+            int offset = me.getKey();
+            var fr = me.getValue();
+            writeFrame(buf, offset - prevOffset - 1, prevLocals, fr);
+            prevOffset = offset;
+            prevLocals = fr.locals();
+        }
+    }
+
+    private static void writeFrame(BufWriterImpl out, int offsetDelta, List<VerificationTypeInfo> prevLocals, StackMapFrameInfo fr) {
+        if (offsetDelta < 0) throw new IllegalArgumentException("Invalid stack map frames order");
+        if (fr.stack().isEmpty()) {
+            int commonLocalsSize = Math.min(prevLocals.size(), fr.locals().size());
+            int diffLocalsSize = fr.locals().size() - prevLocals.size();
+            if (-3 <= diffLocalsSize && diffLocalsSize <= 3 && equals(fr.locals(), prevLocals, commonLocalsSize)) {
+                if (diffLocalsSize == 0 && offsetDelta < 64) { //same frame
+                    out.writeU1(offsetDelta);
+                } else {   //chop, same extended or append frame
+                    out.writeU1(251 + diffLocalsSize);
+                    out.writeU2(offsetDelta);
+                    for (int i=commonLocalsSize; i<fr.locals().size(); i++) writeTypeInfo(out, fr.locals().get(i));
+                }
+                return;
+            }
+        } else if (fr.stack().size() == 1 && fr.locals().equals(prevLocals)) {
+            if (offsetDelta < 64) {  //same locals 1 stack item frame
+                out.writeU1(64 + offsetDelta);
+            } else {  //same locals 1 stack item extended frame
+                out.writeU1(247);
+                out.writeU2(offsetDelta);
+            }
+            writeTypeInfo(out, fr.stack().get(0));
+            return;
+        }
+        //full frame
+        out.writeU1(255);
+        out.writeU2(offsetDelta);
+        out.writeU2(fr.locals().size());
+        for (var l : fr.locals()) writeTypeInfo(out, l);
+        out.writeU2(fr.stack().size());
+        for (var s : fr.stack()) writeTypeInfo(out, s);
+    }
+
+    private static boolean equals(List<VerificationTypeInfo> l1, List<VerificationTypeInfo> l2, int compareSize) {
+        for (int i = 0; i < compareSize; i++) {
+            if (!l1.get(i).equals(l2.get(i))) return false;
+        }
+        return true;
+    }
+
+    private static void writeTypeInfo(BufWriterImpl bw, VerificationTypeInfo vti) {
+        bw.writeU1(vti.tag());
+        switch (vti) {
+            case SimpleVerificationTypeInfo svti ->
+                {}
+            case ObjectVerificationTypeInfo ovti ->
+                bw.writeIndex(ovti.className());
+            case UninitializedVerificationTypeInfo uvti ->
+                bw.writeU2(bw.labelContext().labelToBci(uvti.newTarget()));
+        }
+    }
+
+    List<StackMapFrameInfo> entries() {
+        p = pos;
+        List<VerificationTypeInfo> locals = initFrameLocals, stack = List.of();
+        int bci = -1;
+        var entries = new StackMapFrameInfo[u2()];
+        for (int ei = 0; ei < entries.length; ei++) {
+            int frameType = classReader.readU1(p++);
+            if (frameType < 64) {
+                bci += frameType + 1;
+                stack = List.of();
+            } else if (frameType < 128) {
+                bci += frameType - 63;
+                stack = List.of(readVerificationTypeInfo());
+            } else {
+                if (frameType < SAME_LOCALS_1_STACK_ITEM_EXTENDED)
+                    throw new IllegalArgumentException("Invalid stackmap frame type: " + frameType);
+                bci += u2() + 1;
+                if (frameType == SAME_LOCALS_1_STACK_ITEM_EXTENDED) {
+                    stack = List.of(readVerificationTypeInfo());
+                } else if (frameType < SAME_EXTENDED) {
+                    locals = locals.subList(0, locals.size() + frameType - SAME_EXTENDED);
+                    stack = List.of();
+                } else if (frameType == SAME_EXTENDED) {
+                    stack = List.of();
+                } else if (frameType < SAME_EXTENDED + 4) {
+                    int actSize = locals.size();
+                    var newLocals = locals.toArray(new VerificationTypeInfo[actSize + frameType - SAME_EXTENDED]);
+                    for (int i = actSize; i < newLocals.length; i++)
+                        newLocals[i] = readVerificationTypeInfo();
+                    locals = List.of(newLocals);
+                    stack = List.of();
+                } else {
+                    var newLocals = new VerificationTypeInfo[u2()];
+                    for (int i=0; i<newLocals.length; i++)
+                        newLocals[i] = readVerificationTypeInfo();
+                    var newStack = new VerificationTypeInfo[u2()];
+                    for (int i=0; i<newStack.length; i++)
+                        newStack[i] = readVerificationTypeInfo();
+                    locals = List.of(newLocals);
+                    stack = List.of(newStack);
+                }
+            }
+            entries[ei] = new StackMapFrameImpl(frameType,
+                        ctx.getLabel(bci),
+                        locals,
+                        stack);
+        }
+        return List.of(entries);
+    }
+
+    private VerificationTypeInfo readVerificationTypeInfo() {
+        int tag = classReader.readU1(p++);
+        return switch (tag) {
+            case VT_TOP -> SimpleVerificationTypeInfo.ITEM_TOP;
+            case VT_INTEGER -> SimpleVerificationTypeInfo.ITEM_INTEGER;
+            case VT_FLOAT -> SimpleVerificationTypeInfo.ITEM_FLOAT;
+            case VT_DOUBLE -> SimpleVerificationTypeInfo.ITEM_DOUBLE;
+            case VT_LONG -> SimpleVerificationTypeInfo.ITEM_LONG;
+            case VT_NULL -> SimpleVerificationTypeInfo.ITEM_NULL;
+            case VT_UNINITIALIZED_THIS -> SimpleVerificationTypeInfo.ITEM_UNINITIALIZED_THIS;
+            case VT_OBJECT -> new ObjectVerificationTypeInfoImpl(classReader.entryByIndex(u2(), ClassEntry.class));
+            case VT_UNINITIALIZED -> new UninitializedVerificationTypeInfoImpl(ctx.getLabel(u2()));
+            default -> throw new IllegalArgumentException("Invalid verification type tag: " + tag);
+        };
+    }
+
+    public static record ObjectVerificationTypeInfoImpl(
+            ClassEntry className) implements ObjectVerificationTypeInfo {
+
+        @Override
+        public int tag() { return VT_OBJECT; }
+
+        @Override
+        public boolean equals(Object o) {
+            if (this == o) return true;
+            if (o instanceof ObjectVerificationTypeInfoImpl that) {
+                return Objects.equals(className, that.className);
+            }
+            return false;
+        }
+
+        @Override
+        public int hashCode() {
+            return Objects.hash(className);
+        }
+
+        @Override
+        public String toString() {
+            return className.asInternalName();
+        }
+    }
+
+    public static record UninitializedVerificationTypeInfoImpl(Label newTarget) implements UninitializedVerificationTypeInfo {
+
+        @Override
+        public int tag() { return VT_UNINITIALIZED; }
+
+        @Override
+        public String toString() {
+            return "UNINIT(" + newTarget +")";
+        }
+    }
+
+    private int u2() {
+        int v = classReader.readU2(p);
+        p += 2;
+        return v;
+    }
+
+    public static record StackMapFrameImpl(int frameType,
+                                           Label target,
+                                           List<VerificationTypeInfo> locals,
+                                           List<VerificationTypeInfo> stack)
+            implements StackMapFrameInfo {
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/classfile/impl/StackMapGenerator$1.class b/tests/test_data/std/jdk/internal/classfile/impl/StackMapGenerator$1.class
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diff --git a/tests/test_data/std/jdk/internal/classfile/impl/StackMapGenerator$RawExceptionCatch.class b/tests/test_data/std/jdk/internal/classfile/impl/StackMapGenerator$RawExceptionCatch.class
new file mode 100644
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diff --git a/tests/test_data/std/jdk/internal/classfile/impl/StackMapGenerator$Type.class b/tests/test_data/std/jdk/internal/classfile/impl/StackMapGenerator$Type.class
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diff --git a/tests/test_data/std/jdk/internal/classfile/impl/StackMapGenerator.class b/tests/test_data/std/jdk/internal/classfile/impl/StackMapGenerator.class
new file mode 100644
index 0000000000000000000000000000000000000000..100a511b1d73233db9ec901dfe3d39721191d825
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/classfile/impl/StackMapGenerator.java b/tests/test_data/std/jdk/internal/classfile/impl/StackMapGenerator.java
new file mode 100644
index 00000000..dd4d7d42
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/classfile/impl/StackMapGenerator.java
@@ -0,0 +1,1402 @@
+/*
+ * Copyright (c) 2022, 2024, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ *
+ */
+package jdk.internal.classfile.impl;
+
+import java.lang.classfile.constantpool.InvokeDynamicEntry;
+import java.lang.classfile.constantpool.NameAndTypeEntry;
+import java.lang.constant.ClassDesc;
+import static java.lang.constant.ConstantDescs.*;
+import java.lang.constant.MethodTypeDesc;
+import java.lang.classfile.ClassFile;
+import java.lang.classfile.constantpool.ClassEntry;
+import java.lang.classfile.constantpool.ConstantDynamicEntry;
+import java.lang.classfile.constantpool.DynamicConstantPoolEntry;
+import java.lang.classfile.constantpool.MemberRefEntry;
+import java.lang.classfile.constantpool.ConstantPoolBuilder;
+import java.nio.ByteBuffer;
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.BitSet;
+import java.util.List;
+import java.util.Objects;
+import java.util.stream.Collectors;
+import java.lang.classfile.Attribute;
+
+import static java.lang.classfile.ClassFile.*;
+import java.lang.classfile.BufWriter;
+import java.lang.classfile.Label;
+import java.lang.classfile.attribute.StackMapTableAttribute;
+import java.lang.classfile.Attributes;
+
+/**
+ * StackMapGenerator is responsible for stack map frames generation.
+ * <p>
+ * Stack map frames are computed from serialized bytecode similar way they are verified during class loading process.
+ * <p>
+ * The {@linkplain #generate() frames computation} consists of following steps:
+ * <ol>
+ * <li>{@linkplain #detectFrameOffsets() Detection} of mandatory stack map frames offsets:<ul>
+ *      <li>Mandatory stack map frame offsets include all jump and switch instructions targets,
+ *          offsets immediately following {@linkplain #noControlFlow(int) "no control flow"}
+ *          and all exception table handlers.
+ *      <li>Detection is performed in a single fast pass through the bytecode,
+ *          with no auxiliary structures construction nor further instructions processing.
+ * </ul>
+ * <li>Generator loop {@linkplain #processMethod() processing bytecode instructions}:<ul>
+ *      <li>Generator loop simulates sequence instructions {@linkplain #processBlock(RawBytecodeHelper) processing effect on the actual stack and locals}.
+ *      <li>All mandatory {@linkplain Frame frames} detected in the step #1 are {@linkplain Frame#checkAssignableTo(Frame) retro-filled}
+ *          (or {@linkplain Frame#merge(Type, Type[], int, Frame) reverse-merged} in subsequent processing)
+ *          with the actual stack and locals for all matching jump, switch and exception handler targets.
+ *      <li>All frames modified by reverse merges are marked as {@linkplain Frame#dirty dirty} for further processing.
+ *      <li>Code blocks with not yet known entry frame content are skipped and related frames are also marked as dirty.
+ *      <li>Generator loop process is repeated until all mandatory frames are cleared or until an error state is reached.
+ *      <li>Generator loop always passes all instructions at least once to calculate {@linkplain #maxStack max stack}
+ *          and {@linkplain #maxLocals max locals} code attributes.
+ *      <li>More than one pass is usually not necessary, except for more complex bytecode sequences.<br>
+ *          <i>(Note: experimental measurements showed that more than 99% of the cases required only single pass to clear all frames,
+ *          less than 1% of the cases required second pass and remaining 0,01% of the cases required third pass to clear all frames.)</i>.
+ * </ul>
+ * <li>Dead code patching to pass class loading verification:<ul>
+ *      <li>Dead code blocks are indicated by frames remaining without content after leaving the Generator loop.
+ *      <li>Each dead code block is filled with <code>NOP</code> instructions, terminated with
+ *          <code>ATHROW</code> instruction, and removed from exception handlers table.
+ *      <li>Dead code block entry frame is set to <code>java.lang.Throwable</code> single stack item and no locals.
+ * </ul>
+ * </ol>
+ * <p>
+ * {@linkplain Frame#merge(Type, Type[], int, Frame) Reverse-merge} of the stack map frames
+ * may in some situations require to determine {@linkplain ClassHierarchyImpl class hierarchy} relations.
+ * <p>
+ * Reverse-merge of individual {@linkplain Type types} is performed when a target frame has already been retro-filled
+ * and it is necessary to adjust its existing stack entries and locals to also match actual stack map frame conditions.
+ * Following tables describe how new target stack entry or local type is calculated, based on the actual frame stack entry or local ("from")
+ * and actual value of the target stack entry or local ("to").
+ *
+ * <table border="1">
+ * <caption>Reverse-merge of general type categories</caption>
+ * <tr><th>to \ from<th>TOP<th>PRIMITIVE<th>UNINITIALIZED<th>REFERENCE
+ * <tr><th>TOP<td>TOP<td>TOP<td>TOP<td>TOP
+ * <tr><th>PRIMITIVE<td>TOP<td><a href="#primitives">Reverse-merge of primitive types</a><td>TOP<td>TOP
+ * <tr><th>UNINITIALIZED<td>TOP<td>TOP<td>Is NEW offset matching ? UNINITIALIZED : TOP<td>TOP
+ * <tr><th>REFERENCE<td>TOP<td>TOP<td>TOP<td><a href="#references">Reverse-merge of reference types</a>
+ * </table>
+ * <p>
+ * <table id="primitives" border="1">
+ * <caption>Reverse-merge of primitive types</caption>
+ * <tr><th>to \ from<th>SHORT<th>BYTE<th>BOOLEAN<th>LONG<th>DOUBLE<th>FLOAT<th>INTEGER
+ * <tr><th>SHORT<td>SHORT<td>TOP<td>TOP<td>TOP<td>TOP<td>TOP<td>SHORT
+ * <tr><th>BYTE<td>TOP<td>BYTE<td>TOP<td>TOP<td>TOP<td>TOP<td>BYTE
+ * <tr><th>BOOLEAN<td>TOP<td>TOP<td>BOOLEAN<td>TOP<td>TOP<td>TOP<td>BOOLEAN
+ * <tr><th>LONG<td>TOP<td>TOP<td>TOP<td>LONG<td>TOP<td>TOP<td>TOP
+ * <tr><th>DOUBLE<td>TOP<td>TOP<td>TOP<td>TOP<td>DOUBLE<td>TOP<td>TOP
+ * <tr><th>FLOAT<td>TOP<td>TOP<td>TOP<td>TOP<td>TOP<td>FLOAT<td>TOP
+ * <tr><th>INTEGER<td>TOP<td>TOP<td>TOP<td>TOP<td>TOP<td>TOP<td>INTEGER
+ * </table>
+ * <p>
+ * <table id="references" border="1">
+ * <caption>Reverse merge of reference types</caption>
+ * <tr><th>to \ from<th>NULL<th>j.l.Object<th>j.l.Cloneable<th>j.i.Serializable<th>ARRAY<th>INTERFACE*<th>OBJECT**
+ * <tr><th>NULL<td>NULL<td>j.l.Object<td>j.l.Cloneable<td>j.i.Serializable<td>ARRAY<td>INTERFACE<td>OBJECT
+ * <tr><th>j.l.Object<td>j.l.Object<td>j.l.Object<td>j.l.Object<td>j.l.Object<td>j.l.Object<td>j.l.Object<td>j.l.Object
+ * <tr><th>j.l.Cloneable<td>j.l.Cloneable<td>j.l.Cloneable<td>j.l.Cloneable<td>j.l.Cloneable<td>j.l.Object<td>j.l.Cloneable<td>j.l.Cloneable
+ * <tr><th>j.i.Serializable<td>j.i.Serializable<td>j.i.Serializable<td>j.i.Serializable<td>j.i.Serializable<td>j.l.Object<td>j.i.Serializable<td>j.i.Serializable
+ * <tr><th>ARRAY<td>ARRAY<td>j.l.Object<td>j.l.Object<td>j.l.Object<td><a href="#arrays">Reverse merge of arrays</a><td>j.l.Object<td>j.l.Object
+ * <tr><th>INTERFACE*<td>INTERFACE<td>j.l.Object<td>j.l.Object<td>j.l.Object<td>j.l.Object<td>j.l.Object<td>j.l.Object
+ * <tr><th>OBJECT**<td>OBJECT<td>j.l.Object<td>j.l.Object<td>j.l.Object<td>j.l.Object<td>j.l.Object<td>Resolved common ancestor
+ * <tr><td colspan="8">*any interface reference except for j.l.Cloneable and j.i.Serializable<br>**any object reference except for j.l.Object
+ * </table>
+ * <p id="arrays">
+ * Array types are reverse-merged as reference to array type constructed from reverse-merged components.
+ * Reference to j.l.Object is an alternate result when construction of the array type is not possible (when reverse-merge of components returned TOP or other non-reference and non-primitive type).
+ * <p>
+ * Custom class hierarchy resolver has been implemented as a part of the library to avoid heavy class loading
+ * and to allow stack maps generation even for code with incomplete dependency classpath.
+ * However stack maps generated with {@linkplain ClassHierarchyImpl#resolve(java.lang.constant.ClassDesc) warnings of unresolved dependencies} may later fail to verify during class loading process.
+ * <p>
+ * Focus of the whole algorithm is on high performance and low memory footprint:<ul>
+ *      <li>It does not produce, collect nor visit any complex intermediate structures
+ *          <i>(beside {@linkplain RawBytecodeHelper traversing} the {@linkplain #bytecode bytecode in binary form}).</i>
+ *      <li>It works with only minimal mandatory stack map frames.
+ *      <li>It does not spend time on any non-essential verifications.
+ * </ul>
+ */
+
+public final class StackMapGenerator {
+
+    static StackMapGenerator of(DirectCodeBuilder dcb, BufWriterImpl buf) {
+        return new StackMapGenerator(
+                dcb,
+                buf.thisClass().asSymbol(),
+                dcb.methodInfo.methodName().stringValue(),
+                dcb.methodInfo.methodTypeSymbol(),
+                (dcb.methodInfo.methodFlags() & ACC_STATIC) != 0,
+                ((BufWriterImpl) dcb.bytecodesBufWriter).asByteBuffer(),
+                dcb.constantPool,
+                dcb.context,
+                dcb.handlers);
+    }
+
+    private static final String OBJECT_INITIALIZER_NAME = "<init>";
+    private static final int FLAG_THIS_UNINIT = 0x01;
+    private static final int FRAME_DEFAULT_CAPACITY = 10;
+    private static final int T_BOOLEAN = 4, T_LONG = 11;
+
+    private static final int ITEM_TOP = 0,
+            ITEM_INTEGER = 1,
+            ITEM_FLOAT = 2,
+            ITEM_DOUBLE = 3,
+            ITEM_LONG = 4,
+            ITEM_NULL = 5,
+            ITEM_UNINITIALIZED_THIS = 6,
+            ITEM_OBJECT = 7,
+            ITEM_UNINITIALIZED = 8,
+            ITEM_BOOLEAN = 9,
+            ITEM_BYTE = 10,
+            ITEM_SHORT = 11,
+            ITEM_CHAR = 12,
+            ITEM_LONG_2ND = 13,
+            ITEM_DOUBLE_2ND = 14;
+
+    private static final Type[] ARRAY_FROM_BASIC_TYPE = {null, null, null, null,
+        Type.BOOLEAN_ARRAY_TYPE, Type.CHAR_ARRAY_TYPE, Type.FLOAT_ARRAY_TYPE, Type.DOUBLE_ARRAY_TYPE,
+        Type.BYTE_ARRAY_TYPE, Type.SHORT_ARRAY_TYPE, Type.INT_ARRAY_TYPE, Type.LONG_ARRAY_TYPE};
+
+    static record RawExceptionCatch(int start, int end, int handler, Type catchType) {}
+
+    private final Type thisType;
+    private final String methodName;
+    private final MethodTypeDesc methodDesc;
+    private final ByteBuffer bytecode;
+    private final SplitConstantPool cp;
+    private final boolean isStatic;
+    private final LabelContext labelContext;
+    private final List<AbstractPseudoInstruction.ExceptionCatchImpl> handlers;
+    private final List<RawExceptionCatch> rawHandlers;
+    private final ClassHierarchyImpl classHierarchy;
+    private final boolean patchDeadCode;
+    private final boolean filterDeadLabels;
+    private List<Frame> frames;
+    private final Frame currentFrame;
+    private int maxStack, maxLocals;
+
+    /**
+     * Primary constructor of the <code>Generator</code> class.
+     * New <code>Generator</code> instance must be created for each individual class/method.
+     * Instance contains only immutable results, all the calculations are processed during instance construction.
+     *
+     * @param labelContext <code>LabelContext</code> instance used to resolve or patch <code>ExceptionHandler</code>
+     * labels to bytecode offsets (or vice versa)
+     * @param thisClass class to generate stack maps for
+     * @param methodName method name to generate stack maps for
+     * @param methodDesc method descriptor to generate stack maps for
+     * @param isStatic information whether the method is static
+     * @param bytecode R/W <code>ByteBuffer</code> wrapping method bytecode, the content is altered in case <code>Generator</code> detects  and patches dead code
+     * @param cp R/W <code>ConstantPoolBuilder</code> instance used to resolve all involved CP entries and also generate new entries referenced from the generated stack maps
+     * @param handlers R/W <code>ExceptionHandler</code> list used to detect mandatory frame offsets as well as to determine stack maps in exception handlers
+     * and also to be altered when dead code is detected and must be excluded from exception handlers
+     */
+    public StackMapGenerator(LabelContext labelContext,
+                     ClassDesc thisClass,
+                     String methodName,
+                     MethodTypeDesc methodDesc,
+                     boolean isStatic,
+                     ByteBuffer bytecode,
+                     SplitConstantPool cp,
+                     ClassFileImpl context,
+                     List<AbstractPseudoInstruction.ExceptionCatchImpl> handlers) {
+        this.thisType = Type.referenceType(thisClass);
+        this.methodName = methodName;
+        this.methodDesc = methodDesc;
+        this.isStatic = isStatic;
+        this.bytecode = bytecode;
+        this.cp = cp;
+        this.labelContext = labelContext;
+        this.handlers = handlers;
+        this.rawHandlers = new ArrayList<>(handlers.size());
+        this.classHierarchy = new ClassHierarchyImpl(context.classHierarchyResolverOption().classHierarchyResolver());
+        this.patchDeadCode = context.deadCodeOption() == ClassFile.DeadCodeOption.PATCH_DEAD_CODE;
+        this.filterDeadLabels = context.deadLabelsOption() == ClassFile.DeadLabelsOption.DROP_DEAD_LABELS;
+        this.currentFrame = new Frame(classHierarchy);
+        generate();
+    }
+
+    /**
+     * Calculated maximum number of the locals required
+     * @return maximum number of the locals required
+     */
+    public int maxLocals() {
+        return maxLocals;
+    }
+
+    /**
+     * Calculated maximum stack size required
+     * @return maximum stack size required
+     */
+    public int maxStack() {
+        return maxStack;
+    }
+
+    private Frame getFrame(int offset) {
+        //binary search over frames ordered by offset
+        int low = 0;
+        int high = frames.size() - 1;
+        while (low <= high) {
+            int mid = (low + high) >>> 1;
+            var f = frames.get(mid);
+            if (f.offset < offset)
+                low = mid + 1;
+            else if (f.offset > offset)
+                high = mid - 1;
+            else
+                return f;
+        }
+        return null;
+    }
+
+    private void checkJumpTarget(Frame frame, int target) {
+        frame.checkAssignableTo(getFrame(target));
+    }
+
+    private int exMin, exMax;
+
+    private boolean isAnyFrameDirty() {
+        for (var f : frames) {
+            if (f.dirty) return true;
+        }
+        return false;
+    }
+
+    private void generate() {
+        exMin = bytecode.capacity();
+        exMax = -1;
+        for (var exhandler : handlers) {
+            int start_pc = labelContext.labelToBci(exhandler.tryStart());
+            int end_pc = labelContext.labelToBci(exhandler.tryEnd());
+            int handler_pc = labelContext.labelToBci(exhandler.handler());
+            if (start_pc >= 0 && end_pc >= 0 && end_pc > start_pc && handler_pc >= 0) {
+                if (start_pc < exMin) exMin = start_pc;
+                if (end_pc > exMax) exMax = end_pc;
+                var catchType = exhandler.catchType();
+                rawHandlers.add(new RawExceptionCatch(start_pc, end_pc, handler_pc,
+                        catchType.isPresent() ? cpIndexToType(catchType.get().index(), cp)
+                                              : Type.THROWABLE_TYPE));
+            }
+        }
+        BitSet frameOffsets = detectFrameOffsets();
+        int framesCount = frameOffsets.cardinality();
+        frames = new ArrayList<>(framesCount);
+        int offset = -1;
+        for (int i = 0; i < framesCount; i++) {
+            offset = frameOffsets.nextSetBit(offset + 1);
+            frames.add(new Frame(offset, classHierarchy));
+        }
+        do {
+            processMethod();
+        } while (isAnyFrameDirty());
+        maxLocals = currentFrame.frameMaxLocals;
+        maxStack = currentFrame.frameMaxStack;
+
+        //dead code patching
+        for (int i = 0; i < framesCount; i++) {
+            var frame = frames.get(i);
+            if (frame.flags == -1) {
+                if (!patchDeadCode) throw generatorError("Unable to generate stack map frame for dead code", frame.offset);
+                //patch frame
+                frame.pushStack(Type.THROWABLE_TYPE);
+                if (maxStack < 1) maxStack = 1;
+                int blockSize = (i < framesCount - 1 ? frames.get(i + 1).offset : bytecode.limit()) - frame.offset;
+                //patch bytecode
+                bytecode.position(frame.offset);
+                for (int n=1; n<blockSize; n++) {
+                    bytecode.put((byte) NOP);
+                }
+                bytecode.put((byte) ATHROW);
+                //patch handlers
+                removeRangeFromExcTable(frame.offset, frame.offset + blockSize);
+            }
+        }
+    }
+
+    private void removeRangeFromExcTable(int rangeStart, int rangeEnd) {
+        var it = handlers.listIterator();
+        while (it.hasNext()) {
+            var e = it.next();
+            int handlerStart = labelContext.labelToBci(e.tryStart());
+            int handlerEnd = labelContext.labelToBci(e.tryEnd());
+            if (rangeStart >= handlerEnd || rangeEnd <= handlerStart) {
+                //out of range
+                continue;
+            }
+            if (rangeStart <= handlerStart) {
+              if (rangeEnd >= handlerEnd) {
+                  //complete removal
+                  it.remove();
+              } else {
+                  //cut from left
+                  Label newStart = labelContext.newLabel();
+                  labelContext.setLabelTarget(newStart, rangeEnd);
+                  it.set(new AbstractPseudoInstruction.ExceptionCatchImpl(e.handler(), newStart, e.tryEnd(), e.catchType()));
+              }
+            } else if (rangeEnd >= handlerEnd) {
+                //cut from right
+                Label newEnd = labelContext.newLabel();
+                labelContext.setLabelTarget(newEnd, rangeStart);
+                it.set(new AbstractPseudoInstruction.ExceptionCatchImpl(e.handler(), e.tryStart(), newEnd, e.catchType()));
+            } else {
+                //split
+                Label newStart = labelContext.newLabel();
+                labelContext.setLabelTarget(newStart, rangeEnd);
+                Label newEnd = labelContext.newLabel();
+                labelContext.setLabelTarget(newEnd, rangeStart);
+                it.set(new AbstractPseudoInstruction.ExceptionCatchImpl(e.handler(), e.tryStart(), newEnd, e.catchType()));
+                it.add(new AbstractPseudoInstruction.ExceptionCatchImpl(e.handler(), newStart, e.tryEnd(), e.catchType()));
+            }
+        }
+    }
+
+    /**
+     * Getter of the generated <code>StackMapTableAttribute</code> or null if stack map is empty
+     * @return <code>StackMapTableAttribute</code> or null if stack map is empty
+     */
+    public Attribute<? extends StackMapTableAttribute> stackMapTableAttribute() {
+        return frames.isEmpty() ? null : new UnboundAttribute.AdHocAttribute<>(Attributes.stackMapTable()) {
+            @Override
+            public void writeBody(BufWriter b) {
+                b.writeU2(frames.size());
+                Frame prevFrame =  new Frame(classHierarchy);
+                prevFrame.setLocalsFromArg(methodName, methodDesc, isStatic, thisType);
+                prevFrame.trimAndCompress();
+                for (var fr : frames) {
+                    fr.trimAndCompress();
+                    fr.writeTo(b, prevFrame, cp);
+                    prevFrame = fr;
+                }
+            }
+        };
+    }
+
+    private static Type cpIndexToType(int index, ConstantPoolBuilder cp) {
+        return Type.referenceType(cp.entryByIndex(index, ClassEntry.class).asSymbol());
+    }
+
+    private void processMethod() {
+        currentFrame.setLocalsFromArg(methodName, methodDesc, isStatic, thisType);
+        currentFrame.stackSize = 0;
+        currentFrame.flags = 0;
+        currentFrame.offset = -1;
+        int stackmapIndex = 0;
+        RawBytecodeHelper bcs = new RawBytecodeHelper(bytecode);
+        boolean ncf = false;
+        while (!bcs.isLastBytecode()) {
+            bcs.rawNext();
+            currentFrame.offset = bcs.bci;
+            if (stackmapIndex < frames.size()) {
+                int thisOffset = frames.get(stackmapIndex).offset;
+                if (ncf && thisOffset > bcs.bci) {
+                    throw generatorError("Expecting a stack map frame");
+                }
+                if (thisOffset == bcs.bci) {
+                    if (!ncf) {
+                        currentFrame.checkAssignableTo(frames.get(stackmapIndex));
+                    }
+                    Frame nextFrame = frames.get(stackmapIndex++);
+                    while (!nextFrame.dirty) { //skip unmatched frames
+                        if (stackmapIndex == frames.size()) return; //skip the rest of this round
+                        nextFrame = frames.get(stackmapIndex++);
+                    }
+                    bcs.rawNext(nextFrame.offset); //skip code up-to the next frame
+                    currentFrame.offset = bcs.bci;
+                    currentFrame.copyFrom(nextFrame);
+                    nextFrame.dirty = false;
+                } else if (thisOffset < bcs.bci) {
+                    throw new ClassFormatError(String.format("Bad stack map offset %d", thisOffset));
+                }
+            } else if (ncf) {
+                throw generatorError("Expecting a stack map frame");
+            }
+            ncf = processBlock(bcs);
+        }
+    }
+
+    private boolean processBlock(RawBytecodeHelper bcs) {
+        int opcode = bcs.rawCode;
+        boolean ncf = false;
+        boolean this_uninit = false;
+        boolean verified_exc_handlers = false;
+        int bci = bcs.bci;
+        Type type1, type2, type3, type4;
+        if (RawBytecodeHelper.isStoreIntoLocal(opcode) && bci >= exMin && bci < exMax) {
+            processExceptionHandlerTargets(bci, this_uninit);
+            verified_exc_handlers = true;
+        }
+        switch (opcode) {
+            case NOP -> {}
+            case RETURN -> {
+                ncf = true;
+            }
+            case ACONST_NULL ->
+                currentFrame.pushStack(Type.NULL_TYPE);
+            case ICONST_M1, ICONST_0, ICONST_1, ICONST_2, ICONST_3, ICONST_4, ICONST_5, SIPUSH, BIPUSH ->
+                currentFrame.pushStack(Type.INTEGER_TYPE);
+            case LCONST_0, LCONST_1 ->
+                currentFrame.pushStack(Type.LONG_TYPE, Type.LONG2_TYPE);
+            case FCONST_0, FCONST_1, FCONST_2 ->
+                currentFrame.pushStack(Type.FLOAT_TYPE);
+            case DCONST_0, DCONST_1 ->
+                currentFrame.pushStack(Type.DOUBLE_TYPE, Type.DOUBLE2_TYPE);
+            case LDC ->
+                processLdc(bcs.getIndexU1());
+            case LDC_W, LDC2_W ->
+                processLdc(bcs.getIndexU2());
+            case ILOAD ->
+                currentFrame.checkLocal(bcs.getIndex()).pushStack(Type.INTEGER_TYPE);
+            case ILOAD_0, ILOAD_1, ILOAD_2, ILOAD_3 ->
+                currentFrame.checkLocal(opcode - ILOAD_0).pushStack(Type.INTEGER_TYPE);
+            case LLOAD ->
+                currentFrame.checkLocal(bcs.getIndex() + 1).pushStack(Type.LONG_TYPE, Type.LONG2_TYPE);
+            case LLOAD_0, LLOAD_1, LLOAD_2, LLOAD_3 ->
+                currentFrame.checkLocal(opcode - LLOAD_0 + 1).pushStack(Type.LONG_TYPE, Type.LONG2_TYPE);
+            case FLOAD ->
+                currentFrame.checkLocal(bcs.getIndex()).pushStack(Type.FLOAT_TYPE);
+            case FLOAD_0, FLOAD_1, FLOAD_2, FLOAD_3 ->
+                currentFrame.checkLocal(opcode - FLOAD_0).pushStack(Type.FLOAT_TYPE);
+            case DLOAD ->
+                currentFrame.checkLocal(bcs.getIndex() + 1).pushStack(Type.DOUBLE_TYPE, Type.DOUBLE2_TYPE);
+            case DLOAD_0, DLOAD_1, DLOAD_2, DLOAD_3 ->
+                currentFrame.checkLocal(opcode - DLOAD_0 + 1).pushStack(Type.DOUBLE_TYPE, Type.DOUBLE2_TYPE);
+            case ALOAD ->
+                currentFrame.pushStack(currentFrame.getLocal(bcs.getIndex()));
+            case ALOAD_0, ALOAD_1, ALOAD_2, ALOAD_3 ->
+                currentFrame.pushStack(currentFrame.getLocal(opcode - ALOAD_0));
+            case IALOAD, BALOAD, CALOAD, SALOAD ->
+                currentFrame.decStack(2).pushStack(Type.INTEGER_TYPE);
+            case LALOAD ->
+                currentFrame.decStack(2).pushStack(Type.LONG_TYPE, Type.LONG2_TYPE);
+            case FALOAD ->
+                currentFrame.decStack(2).pushStack(Type.FLOAT_TYPE);
+            case DALOAD ->
+                currentFrame.decStack(2).pushStack(Type.DOUBLE_TYPE, Type.DOUBLE2_TYPE);
+            case AALOAD ->
+                currentFrame.pushStack((type1 = currentFrame.decStack(1).popStack()) == Type.NULL_TYPE ? Type.NULL_TYPE : type1.getComponent());
+            case ISTORE ->
+                currentFrame.decStack(1).setLocal(bcs.getIndex(), Type.INTEGER_TYPE);
+            case ISTORE_0, ISTORE_1, ISTORE_2, ISTORE_3 ->
+                currentFrame.decStack(1).setLocal(opcode - ISTORE_0, Type.INTEGER_TYPE);
+            case LSTORE ->
+                currentFrame.decStack(2).setLocal2(bcs.getIndex(), Type.LONG_TYPE, Type.LONG2_TYPE);
+            case LSTORE_0, LSTORE_1, LSTORE_2, LSTORE_3 ->
+                currentFrame.decStack(2).setLocal2(opcode - LSTORE_0, Type.LONG_TYPE, Type.LONG2_TYPE);
+            case FSTORE ->
+                currentFrame.decStack(1).setLocal(bcs.getIndex(), Type.FLOAT_TYPE);
+            case FSTORE_0, FSTORE_1, FSTORE_2, FSTORE_3 ->
+                currentFrame.decStack(1).setLocal(opcode - FSTORE_0, Type.FLOAT_TYPE);
+            case DSTORE ->
+                currentFrame.decStack(2).setLocal2(bcs.getIndex(), Type.DOUBLE_TYPE, Type.DOUBLE2_TYPE);
+            case DSTORE_0, DSTORE_1, DSTORE_2, DSTORE_3 ->
+                currentFrame.decStack(2).setLocal2(opcode - DSTORE_0, Type.DOUBLE_TYPE, Type.DOUBLE2_TYPE);
+            case ASTORE ->
+                currentFrame.setLocal(bcs.getIndex(), currentFrame.popStack());
+            case ASTORE_0, ASTORE_1, ASTORE_2, ASTORE_3 ->
+                currentFrame.setLocal(opcode - ASTORE_0, currentFrame.popStack());
+            case LASTORE, DASTORE ->
+                currentFrame.decStack(4);
+            case IASTORE, BASTORE, CASTORE, SASTORE, FASTORE, AASTORE ->
+                currentFrame.decStack(3);
+            case POP, MONITORENTER, MONITOREXIT ->
+                currentFrame.decStack(1);
+            case POP2 ->
+                currentFrame.decStack(2);
+            case DUP ->
+                currentFrame.pushStack(type1 = currentFrame.popStack()).pushStack(type1);
+            case DUP_X1 -> {
+                type1 = currentFrame.popStack();
+                type2 = currentFrame.popStack();
+                currentFrame.pushStack(type1).pushStack(type2).pushStack(type1);
+            }
+            case DUP_X2 -> {
+                type1 = currentFrame.popStack();
+                type2 = currentFrame.popStack();
+                type3 = currentFrame.popStack();
+                currentFrame.pushStack(type1).pushStack(type3).pushStack(type2).pushStack(type1);
+            }
+            case DUP2 -> {
+                type1 = currentFrame.popStack();
+                type2 = currentFrame.popStack();
+                currentFrame.pushStack(type2).pushStack(type1).pushStack(type2).pushStack(type1);
+            }
+            case DUP2_X1 -> {
+                type1 = currentFrame.popStack();
+                type2 = currentFrame.popStack();
+                type3 = currentFrame.popStack();
+                currentFrame.pushStack(type2).pushStack(type1).pushStack(type3).pushStack(type2).pushStack(type1);
+            }
+            case DUP2_X2 -> {
+                type1 = currentFrame.popStack();
+                type2 = currentFrame.popStack();
+                type3 = currentFrame.popStack();
+                type4 = currentFrame.popStack();
+                currentFrame.pushStack(type2).pushStack(type1).pushStack(type4).pushStack(type3).pushStack(type2).pushStack(type1);
+            }
+            case SWAP -> {
+                type1 = currentFrame.popStack();
+                type2 = currentFrame.popStack();
+                currentFrame.pushStack(type1);
+                currentFrame.pushStack(type2);
+            }
+            case IADD, ISUB, IMUL, IDIV, IREM, ISHL, ISHR, IUSHR, IOR, IXOR, IAND ->
+                currentFrame.decStack(2).pushStack(Type.INTEGER_TYPE);
+            case INEG, ARRAYLENGTH, INSTANCEOF ->
+                currentFrame.decStack(1).pushStack(Type.INTEGER_TYPE);
+            case LADD, LSUB, LMUL, LDIV, LREM, LAND, LOR, LXOR ->
+                currentFrame.decStack(4).pushStack(Type.LONG_TYPE, Type.LONG2_TYPE);
+            case LNEG ->
+                currentFrame.decStack(2).pushStack(Type.LONG_TYPE, Type.LONG2_TYPE);
+            case LSHL, LSHR, LUSHR ->
+                currentFrame.decStack(3).pushStack(Type.LONG_TYPE, Type.LONG2_TYPE);
+            case FADD, FSUB, FMUL, FDIV, FREM ->
+                currentFrame.decStack(2).pushStack(Type.FLOAT_TYPE);
+            case FNEG ->
+                currentFrame.decStack(1).pushStack(Type.FLOAT_TYPE);
+            case DADD, DSUB, DMUL, DDIV, DREM ->
+                currentFrame.decStack(4).pushStack(Type.DOUBLE_TYPE, Type.DOUBLE2_TYPE);
+            case DNEG ->
+                currentFrame.decStack(2).pushStack(Type.DOUBLE_TYPE, Type.DOUBLE2_TYPE);
+            case IINC ->
+                currentFrame.checkLocal(bcs.getIndex());
+            case I2L ->
+                currentFrame.decStack(1).pushStack(Type.LONG_TYPE, Type.LONG2_TYPE);
+            case L2I ->
+                currentFrame.decStack(2).pushStack(Type.INTEGER_TYPE);
+            case I2F ->
+                currentFrame.decStack(1).pushStack(Type.FLOAT_TYPE);
+            case I2D ->
+                currentFrame.decStack(1).pushStack(Type.DOUBLE_TYPE, Type.DOUBLE2_TYPE);
+            case L2F ->
+                currentFrame.decStack(2).pushStack(Type.FLOAT_TYPE);
+            case L2D ->
+                currentFrame.decStack(2).pushStack(Type.DOUBLE_TYPE, Type.DOUBLE2_TYPE);
+            case F2I ->
+                currentFrame.decStack(1).pushStack(Type.INTEGER_TYPE);
+            case F2L ->
+                currentFrame.decStack(1).pushStack(Type.LONG_TYPE, Type.LONG2_TYPE);
+            case F2D ->
+                currentFrame.decStack(1).pushStack(Type.DOUBLE_TYPE, Type.DOUBLE2_TYPE);
+            case D2L ->
+                currentFrame.decStack(2).pushStack(Type.LONG_TYPE, Type.LONG2_TYPE);
+            case D2F ->
+                currentFrame.decStack(2).pushStack(Type.FLOAT_TYPE);
+            case I2B, I2C, I2S ->
+                currentFrame.decStack(1).pushStack(Type.INTEGER_TYPE);
+            case LCMP, DCMPL, DCMPG ->
+                currentFrame.decStack(4).pushStack(Type.INTEGER_TYPE);
+            case FCMPL, FCMPG, D2I ->
+                currentFrame.decStack(2).pushStack(Type.INTEGER_TYPE);
+            case IF_ICMPEQ, IF_ICMPNE, IF_ICMPLT, IF_ICMPGE, IF_ICMPGT, IF_ICMPLE, IF_ACMPEQ, IF_ACMPNE ->
+                checkJumpTarget(currentFrame.decStack(2), bcs.dest());
+            case IFEQ, IFNE, IFLT, IFGE, IFGT, IFLE, IFNULL, IFNONNULL ->
+                checkJumpTarget(currentFrame.decStack(1), bcs.dest());
+            case GOTO -> {
+                checkJumpTarget(currentFrame, bcs.dest());
+                ncf = true;
+            }
+            case GOTO_W -> {
+                checkJumpTarget(currentFrame, bcs.destW());
+                ncf = true;
+            }
+            case TABLESWITCH, LOOKUPSWITCH -> {
+                processSwitch(bcs);
+                ncf = true;
+            }
+            case LRETURN, DRETURN -> {
+                currentFrame.decStack(2);
+                ncf = true;
+            }
+            case IRETURN, FRETURN, ARETURN, ATHROW -> {
+                currentFrame.decStack(1);
+                ncf = true;
+            }
+            case GETSTATIC, PUTSTATIC, GETFIELD, PUTFIELD ->
+                processFieldInstructions(bcs);
+            case INVOKEVIRTUAL, INVOKESPECIAL, INVOKESTATIC, INVOKEINTERFACE, INVOKEDYNAMIC ->
+                this_uninit = processInvokeInstructions(bcs, (bci >= exMin && bci < exMax), this_uninit);
+            case NEW ->
+                currentFrame.pushStack(Type.uninitializedType(bci));
+            case NEWARRAY ->
+                currentFrame.decStack(1).pushStack(getNewarrayType(bcs.getIndex()));
+            case ANEWARRAY ->
+                processAnewarray(bcs.getIndexU2());
+            case CHECKCAST ->
+                currentFrame.decStack(1).pushStack(cpIndexToType(bcs.getIndexU2(), cp));
+            case MULTIANEWARRAY -> {
+                type1 = cpIndexToType(bcs.getIndexU2(), cp);
+                int dim = bcs.getU1(bcs.bci + 3);
+                for (int i = 0; i < dim; i++) {
+                    currentFrame.popStack();
+                }
+                currentFrame.pushStack(type1);
+            }
+            case JSR, JSR_W, RET ->
+                throw generatorError("Instructions jsr, jsr_w, or ret must not appear in the class file version >= 51.0");
+            default ->
+                throw generatorError(String.format("Bad instruction: %02x", opcode));
+        }
+        if (!verified_exc_handlers && bci >= exMin && bci < exMax) {
+            processExceptionHandlerTargets(bci, this_uninit);
+        }
+        return ncf;
+    }
+
+    private void processExceptionHandlerTargets(int bci, boolean this_uninit) {
+        for (var ex : rawHandlers) {
+            if (bci == ex.start || (currentFrame.localsChanged && bci > ex.start && bci < ex.end)) {
+                int flags = currentFrame.flags;
+                if (this_uninit) flags |= FLAG_THIS_UNINIT;
+                Frame newFrame = currentFrame.frameInExceptionHandler(flags, ex.catchType);
+                checkJumpTarget(newFrame, ex.handler);
+            }
+        }
+        currentFrame.localsChanged = false;
+    }
+
+    private void processLdc(int index) {
+        switch (cp.entryByIndex(index).tag()) {
+            case TAG_UTF8 ->
+                currentFrame.pushStack(Type.OBJECT_TYPE);
+            case TAG_STRING ->
+                currentFrame.pushStack(Type.STRING_TYPE);
+            case TAG_CLASS ->
+                currentFrame.pushStack(Type.CLASS_TYPE);
+            case TAG_INTEGER ->
+                currentFrame.pushStack(Type.INTEGER_TYPE);
+            case TAG_FLOAT ->
+                currentFrame.pushStack(Type.FLOAT_TYPE);
+            case TAG_DOUBLE ->
+                currentFrame.pushStack(Type.DOUBLE_TYPE, Type.DOUBLE2_TYPE);
+            case TAG_LONG ->
+                currentFrame.pushStack(Type.LONG_TYPE, Type.LONG2_TYPE);
+            case TAG_METHODHANDLE ->
+                currentFrame.pushStack(Type.METHOD_HANDLE_TYPE);
+            case TAG_METHODTYPE ->
+                currentFrame.pushStack(Type.METHOD_TYPE);
+            case TAG_CONSTANTDYNAMIC ->
+                currentFrame.pushStack(cp.entryByIndex(index, ConstantDynamicEntry.class).asSymbol().constantType());
+            default ->
+                throw generatorError("CP entry #%d %s is not loadable constant".formatted(index, cp.entryByIndex(index).tag()));
+        }
+    }
+
+    private void processSwitch(RawBytecodeHelper bcs) {
+        int bci = bcs.bci;
+        int alignedBci = RawBytecodeHelper.align(bci + 1);
+        int defaultOfset = bcs.getInt(alignedBci);
+        int keys, delta;
+        currentFrame.popStack();
+        if (bcs.rawCode == TABLESWITCH) {
+            int low = bcs.getInt(alignedBci + 4);
+            int high = bcs.getInt(alignedBci + 2 * 4);
+            if (low > high) {
+                throw generatorError("low must be less than or equal to high in tableswitch");
+            }
+            keys = high - low + 1;
+            if (keys < 0) {
+                throw generatorError("too many keys in tableswitch");
+            }
+            delta = 1;
+        } else {
+            keys = bcs.getInt(alignedBci + 4);
+            if (keys < 0) {
+                throw generatorError("number of keys in lookupswitch less than 0");
+            }
+            delta = 2;
+            for (int i = 0; i < (keys - 1); i++) {
+                int this_key = bcs.getInt(alignedBci + (2 + 2 * i) * 4);
+                int next_key = bcs.getInt(alignedBci + (2 + 2 * i + 2) * 4);
+                if (this_key >= next_key) {
+                    throw generatorError("Bad lookupswitch instruction");
+                }
+            }
+        }
+        int target = bci + defaultOfset;
+        checkJumpTarget(currentFrame, target);
+        for (int i = 0; i < keys; i++) {
+            alignedBci = RawBytecodeHelper.align(bcs.bci + 1);
+            target = bci + bcs.getInt(alignedBci + (3 + i * delta) * 4);
+            checkJumpTarget(currentFrame, target);
+        }
+    }
+
+    private void processFieldInstructions(RawBytecodeHelper bcs) {
+        var desc = Util.fieldTypeSymbol(cp.entryByIndex(bcs.getIndexU2(), MemberRefEntry.class).nameAndType());
+        switch (bcs.rawCode) {
+            case GETSTATIC ->
+                currentFrame.pushStack(desc);
+            case PUTSTATIC -> {
+                currentFrame.popStack();
+                if (Util.isDoubleSlot(desc)) currentFrame.popStack();
+            }
+            case GETFIELD -> {
+                currentFrame.popStack();
+                currentFrame.pushStack(desc);
+            }
+            case PUTFIELD -> {
+                currentFrame.popStack();
+                currentFrame.popStack();
+                if (Util.isDoubleSlot(desc)) currentFrame.popStack();
+            }
+            default -> throw new AssertionError("Should not reach here");
+        }
+    }
+
+    private boolean processInvokeInstructions(RawBytecodeHelper bcs, boolean inTryBlock, boolean thisUninit) {
+        int index = bcs.getIndexU2();
+        int opcode = bcs.rawCode;
+        var nameAndType = opcode == INVOKEDYNAMIC
+                ? cp.entryByIndex(index, InvokeDynamicEntry.class).nameAndType()
+                : cp.entryByIndex(index, MemberRefEntry.class).nameAndType();
+        String invokeMethodName = nameAndType.name().stringValue();
+        var mDesc = Util.methodTypeSymbol(nameAndType);
+        int bci = bcs.bci;
+        currentFrame.decStack(Util.parameterSlots(mDesc));
+        if (opcode != INVOKESTATIC && opcode != INVOKEDYNAMIC) {
+            if (OBJECT_INITIALIZER_NAME.equals(invokeMethodName)) {
+                Type type = currentFrame.popStack();
+                if (type == Type.UNITIALIZED_THIS_TYPE) {
+                    if (inTryBlock) {
+                        processExceptionHandlerTargets(bci, true);
+                    }
+                    currentFrame.initializeObject(type, thisType);
+                    thisUninit = true;
+                } else if (type.tag == ITEM_UNINITIALIZED) {
+                    int new_offset = type.bci;
+                    int new_class_index = bcs.getIndexU2Raw(new_offset + 1);
+                    Type new_class_type = cpIndexToType(new_class_index, cp);
+                    if (inTryBlock) {
+                        processExceptionHandlerTargets(bci, thisUninit);
+                    }
+                    currentFrame.initializeObject(type, new_class_type);
+                } else {
+                    throw generatorError("Bad operand type when invoking <init>");
+                }
+            } else {
+                currentFrame.popStack();
+            }
+        }
+        currentFrame.pushStack(mDesc.returnType());
+        return thisUninit;
+    }
+
+    private Type getNewarrayType(int index) {
+        if (index < T_BOOLEAN || index > T_LONG) throw generatorError("Illegal newarray instruction type %d".formatted(index));
+        return ARRAY_FROM_BASIC_TYPE[index];
+    }
+
+    private void processAnewarray(int index) {
+        currentFrame.popStack();
+        currentFrame.pushStack(cpIndexToType(index, cp).toArray());
+    }
+
+    /**
+     * {@return the generator error with attached details}
+     * @param msg error message
+     */
+    private IllegalArgumentException generatorError(String msg) {
+        return generatorError(msg, currentFrame.offset);
+    }
+
+    /**
+     * {@return the generator error with attached details}
+     * @param msg error message
+     * @param offset bytecode offset where the error occurred
+     */
+    private IllegalArgumentException generatorError(String msg, int offset) {
+        var sb = new StringBuilder("%s at bytecode offset %d of method %s(%s)".formatted(
+                msg,
+                offset,
+                methodName,
+                methodDesc.parameterList().stream().map(ClassDesc::displayName).collect(Collectors.joining(","))));
+        Util.dumpMethod(cp, thisType.sym(), methodName, methodDesc, isStatic ? ACC_STATIC : 0, bytecode, sb::append);
+        return new IllegalArgumentException(sb.toString());
+    }
+
+    /**
+     * Performs detection of mandatory stack map frames offsets
+     * in a single bytecode traversing pass
+     * @return <code>java.lang.BitSet</code> of detected frames offsets
+     */
+    private BitSet detectFrameOffsets() {
+        var offsets = new BitSet() {
+            @Override
+            public void set(int i) {
+                if (i < 0 || i >= bytecode.capacity()) throw new IllegalArgumentException();
+                super.set(i);
+            }
+        };
+        RawBytecodeHelper bcs = new RawBytecodeHelper(bytecode);
+        boolean no_control_flow = false;
+        int opcode, bci = 0;
+        while (!bcs.isLastBytecode()) try {
+            opcode = bcs.rawNext();
+            bci = bcs.bci;
+            if (no_control_flow) {
+                offsets.set(bci);
+            }
+            no_control_flow = switch (opcode) {
+                case GOTO -> {
+                            offsets.set(bcs.dest());
+                            yield true;
+                        }
+                case GOTO_W -> {
+                            offsets.set(bcs.destW());
+                            yield true;
+                        }
+                case IF_ICMPEQ, IF_ICMPNE, IF_ICMPLT, IF_ICMPGE,
+                     IF_ICMPGT, IF_ICMPLE, IFEQ, IFNE,
+                     IFLT, IFGE, IFGT, IFLE, IF_ACMPEQ,
+                     IF_ACMPNE , IFNULL , IFNONNULL -> {
+                            offsets.set(bcs.dest());
+                            yield false;
+                        }
+                case TABLESWITCH, LOOKUPSWITCH -> {
+                            int aligned_bci = RawBytecodeHelper.align(bci + 1);
+                            int default_ofset = bcs.getInt(aligned_bci);
+                            int keys, delta;
+                            if (bcs.rawCode == TABLESWITCH) {
+                                int low = bcs.getInt(aligned_bci + 4);
+                                int high = bcs.getInt(aligned_bci + 2 * 4);
+                                keys = high - low + 1;
+                                delta = 1;
+                            } else {
+                                keys = bcs.getInt(aligned_bci + 4);
+                                delta = 2;
+                            }
+                            offsets.set(bci + default_ofset);
+                            for (int i = 0; i < keys; i++) {
+                                offsets.set(bci + bcs.getInt(aligned_bci + (3 + i * delta) * 4));
+                            }
+                            yield true;
+                        }
+                case IRETURN, LRETURN, FRETURN, DRETURN,
+                     ARETURN, RETURN, ATHROW -> true;
+                default -> false;
+            };
+        } catch (IllegalArgumentException iae) {
+            throw generatorError("Detected branch target out of bytecode range", bci);
+        }
+        for (var exhandler : rawHandlers) try {
+             offsets.set(exhandler.handler());
+        } catch (IllegalArgumentException iae) {
+            if (!filterDeadLabels)
+                throw generatorError("Detected exception handler out of bytecode range");
+        }
+        return offsets;
+    }
+
+    private final class Frame {
+
+        int offset;
+        int localsSize, stackSize;
+        int flags;
+        int frameMaxStack = 0, frameMaxLocals = 0;
+        boolean dirty = false;
+        boolean localsChanged = false;
+
+        private final ClassHierarchyImpl classHierarchy;
+
+        private Type[] locals, stack;
+
+        Frame(ClassHierarchyImpl classHierarchy) {
+            this(-1, 0, 0, 0, null, null, classHierarchy);
+        }
+
+        Frame(int offset, ClassHierarchyImpl classHierarchy) {
+            this(offset, -1, 0, 0, null, null, classHierarchy);
+        }
+
+        Frame(int offset, int flags, int locals_size, int stack_size, Type[] locals, Type[] stack, ClassHierarchyImpl classHierarchy) {
+            this.offset = offset;
+            this.localsSize = locals_size;
+            this.stackSize = stack_size;
+            this.flags = flags;
+            this.locals = locals;
+            this.stack = stack;
+            this.classHierarchy = classHierarchy;
+        }
+
+        @Override
+        public String toString() {
+            return (dirty ? "frame* @" : "frame @") + offset + " with locals " + (locals == null ? "[]" : Arrays.asList(locals).subList(0, localsSize)) + " and stack " + (stack == null ? "[]" : Arrays.asList(stack).subList(0, stackSize));
+        }
+
+        Frame pushStack(ClassDesc desc) {
+            return switch (desc.descriptorString().charAt(0)) {
+                case 'J' ->
+                    pushStack(Type.LONG_TYPE, Type.LONG2_TYPE);
+                case 'D' ->
+                    pushStack(Type.DOUBLE_TYPE, Type.DOUBLE2_TYPE);
+                case 'I', 'Z', 'B', 'C', 'S' ->
+                    pushStack(Type.INTEGER_TYPE);
+                case 'F' ->
+                    pushStack(Type.FLOAT_TYPE);
+                case 'V' ->
+                    this;
+                default ->
+                    pushStack(Type.referenceType(desc));
+            };
+        }
+
+        Frame pushStack(Type type) {
+            checkStack(stackSize);
+            stack[stackSize++] = type;
+            return this;
+        }
+
+        Frame pushStack(Type type1, Type type2) {
+            checkStack(stackSize + 1);
+            stack[stackSize++] = type1;
+            stack[stackSize++] = type2;
+            return this;
+        }
+
+        Type popStack() {
+            if (stackSize < 1) throw generatorError("Operand stack underflow");
+            return stack[--stackSize];
+        }
+
+        Frame decStack(int size) {
+            stackSize -= size;
+            if (stackSize < 0) throw generatorError("Operand stack underflow");
+            return this;
+        }
+
+        Frame frameInExceptionHandler(int flags, Type excType) {
+            return new Frame(offset, flags, localsSize, 1, locals, new Type[] {excType}, classHierarchy);
+        }
+
+        void initializeObject(Type old_object, Type new_object) {
+            int i;
+            for (i = 0; i < localsSize; i++) {
+                if (locals[i].equals(old_object)) {
+                    locals[i] = new_object;
+                    localsChanged = true;
+                }
+            }
+            for (i = 0; i < stackSize; i++) {
+                if (stack[i].equals(old_object)) {
+                    stack[i] = new_object;
+                }
+            }
+            if (old_object == Type.UNITIALIZED_THIS_TYPE) {
+                flags = 0;
+            }
+        }
+
+        Frame checkLocal(int index) {
+            if (index >= frameMaxLocals) frameMaxLocals = index + 1;
+            if (locals == null) {
+                locals = new Type[index + FRAME_DEFAULT_CAPACITY];
+                Arrays.fill(locals, Type.TOP_TYPE);
+            } else if (index >= locals.length) {
+                int current = locals.length;
+                locals = Arrays.copyOf(locals, index + FRAME_DEFAULT_CAPACITY);
+                Arrays.fill(locals, current, locals.length, Type.TOP_TYPE);
+            }
+            return this;
+        }
+
+        private void checkStack(int index) {
+            if (index >= frameMaxStack) frameMaxStack = index + 1;
+            if (stack == null) {
+                stack = new Type[index + FRAME_DEFAULT_CAPACITY];
+                Arrays.fill(stack, Type.TOP_TYPE);
+            } else if (index >= stack.length) {
+                int current = stack.length;
+                stack = Arrays.copyOf(stack, index + FRAME_DEFAULT_CAPACITY);
+                Arrays.fill(stack, current, stack.length, Type.TOP_TYPE);
+            }
+        }
+
+        private void setLocalRawInternal(int index, Type type) {
+            checkLocal(index);
+            localsChanged |= !type.equals(locals[index]);
+            locals[index] = type;
+        }
+
+        void setLocalsFromArg(String name, MethodTypeDesc methodDesc, boolean isStatic, Type thisKlass) {
+            int localsSize = 0;
+            // Pre-emptively create a locals array that encompass all parameter slots
+            checkLocal(methodDesc.parameterCount() + (isStatic ? -1 : 0));
+            if (!isStatic) {
+                localsSize++;
+                if (OBJECT_INITIALIZER_NAME.equals(name) && !CD_Object.equals(thisKlass.sym)) {
+                    setLocal(0, Type.UNITIALIZED_THIS_TYPE);
+                    flags |= FLAG_THIS_UNINIT;
+                } else {
+                    setLocalRawInternal(0, thisKlass);
+                }
+            }
+            for (int i = 0; i < methodDesc.parameterCount(); i++) {
+                var desc = methodDesc.parameterType(i);
+                if (!desc.isPrimitive()) {
+                    setLocalRawInternal(localsSize++, Type.referenceType(desc));
+                } else switch (desc.descriptorString().charAt(0)) {
+                    case 'J' -> {
+                        setLocalRawInternal(localsSize++, Type.LONG_TYPE);
+                        setLocalRawInternal(localsSize++, Type.LONG2_TYPE);
+                    }
+                    case 'D' -> {
+                        setLocalRawInternal(localsSize++, Type.DOUBLE_TYPE);
+                        setLocalRawInternal(localsSize++, Type.DOUBLE2_TYPE);
+                    }
+                    case 'I', 'Z', 'B', 'C', 'S' ->
+                        setLocalRawInternal(localsSize++, Type.INTEGER_TYPE);
+                    case 'F' ->
+                        setLocalRawInternal(localsSize++, Type.FLOAT_TYPE);
+                    default -> throw new AssertionError("Should not reach here");
+                }
+            }
+            this.localsSize = localsSize;
+        }
+
+        void copyFrom(Frame src) {
+            if (locals != null && src.localsSize < locals.length) Arrays.fill(locals, src.localsSize, locals.length, Type.TOP_TYPE);
+            localsSize = src.localsSize;
+            checkLocal(src.localsSize - 1);
+            if (src.localsSize > 0) System.arraycopy(src.locals, 0, locals, 0, src.localsSize);
+            if (stack != null && src.stackSize < stack.length) Arrays.fill(stack, src.stackSize, stack.length, Type.TOP_TYPE);
+            stackSize = src.stackSize;
+            checkStack(src.stackSize - 1);
+            if (src.stackSize > 0) System.arraycopy(src.stack, 0, stack, 0, src.stackSize);
+            flags = src.flags;
+            localsChanged = true;
+        }
+
+        void checkAssignableTo(Frame target) {
+            if (target.flags == -1) {
+                target.locals = locals == null ? null : Arrays.copyOf(locals, localsSize);
+                target.localsSize = localsSize;
+                target.stack = stack == null ? null : Arrays.copyOf(stack, stackSize);
+                target.stackSize = stackSize;
+                target.flags = flags;
+                target.dirty = true;
+            } else {
+                if (target.localsSize > localsSize) {
+                    target.localsSize = localsSize;
+                    target.dirty = true;
+                }
+                for (int i = 0; i < target.localsSize; i++) {
+                    merge(locals[i], target.locals, i, target);
+                }
+                if (stackSize != target.stackSize) {
+                    throw generatorError("Stack size mismatch");
+                }
+                for (int i = 0; i < target.stackSize; i++) {
+                    if (merge(stack[i], target.stack, i, target) == Type.TOP_TYPE) {
+                        throw generatorError("Stack content mismatch");
+                    }
+                }
+            }
+        }
+
+        private Type getLocalRawInternal(int index) {
+            checkLocal(index);
+            return locals[index];
+        }
+
+        Type getLocal(int index) {
+            Type ret = getLocalRawInternal(index);
+            if (index >= localsSize) {
+                localsSize = index + 1;
+            }
+            return ret;
+        }
+
+        void setLocal(int index, Type type) {
+            Type old = getLocalRawInternal(index);
+            if (old == Type.DOUBLE_TYPE || old == Type.LONG_TYPE) {
+                setLocalRawInternal(index + 1, Type.TOP_TYPE);
+            }
+            if (old == Type.DOUBLE2_TYPE || old == Type.LONG2_TYPE) {
+                setLocalRawInternal(index - 1, Type.TOP_TYPE);
+            }
+            setLocalRawInternal(index, type);
+            if (index >= localsSize) {
+                localsSize = index + 1;
+            }
+        }
+
+        void setLocal2(int index, Type type1, Type type2) {
+            Type old = getLocalRawInternal(index + 1);
+            if (old == Type.DOUBLE_TYPE || old == Type.LONG_TYPE) {
+                setLocalRawInternal(index + 2, Type.TOP_TYPE);
+            }
+            old = getLocalRawInternal(index);
+            if (old == Type.DOUBLE2_TYPE || old == Type.LONG2_TYPE) {
+                setLocalRawInternal(index - 1, Type.TOP_TYPE);
+            }
+            setLocalRawInternal(index, type1);
+            setLocalRawInternal(index + 1, type2);
+            if (index >= localsSize - 1) {
+                localsSize = index + 2;
+            }
+        }
+
+        private Type merge(Type me, Type[] toTypes, int i, Frame target) {
+            var to = toTypes[i];
+            var newTo = to.mergeFrom(me, classHierarchy);
+            if (to != newTo && !to.equals(newTo)) {
+                toTypes[i] = newTo;
+                target.dirty = true;
+            }
+            return newTo;
+        }
+
+        private static int trimAndCompress(Type[] types, int count) {
+            while (count > 0 && types[count - 1] == Type.TOP_TYPE) count--;
+            int compressed = 0;
+            for (int i = 0; i < count; i++) {
+                if (!types[i].isCategory2_2nd()) {
+                    types[compressed++] = types[i];
+                }
+            }
+            return compressed;
+        }
+
+        void trimAndCompress() {
+            localsSize = trimAndCompress(locals, localsSize);
+            stackSize = trimAndCompress(stack, stackSize);
+        }
+
+        private static boolean equals(Type[] l1, Type[] l2, int commonSize) {
+            if (l1 == null || l2 == null) return commonSize == 0;
+            return Arrays.equals(l1, 0, commonSize, l2, 0, commonSize);
+        }
+
+        void writeTo(BufWriter out, Frame prevFrame, ConstantPoolBuilder cp) {
+            int offsetDelta = offset - prevFrame.offset - 1;
+            if (stackSize == 0) {
+                int commonLocalsSize = localsSize > prevFrame.localsSize ? prevFrame.localsSize : localsSize;
+                int diffLocalsSize = localsSize - prevFrame.localsSize;
+                if (-3 <= diffLocalsSize && diffLocalsSize <= 3 && equals(locals, prevFrame.locals, commonLocalsSize)) {
+                    if (diffLocalsSize == 0 && offsetDelta < 64) { //same frame
+                        out.writeU1(offsetDelta);
+                    } else {   //chop, same extended or append frame
+                        out.writeU1(251 + diffLocalsSize);
+                        out.writeU2(offsetDelta);
+                        for (int i=commonLocalsSize; i<localsSize; i++) locals[i].writeTo(out, cp);
+                    }
+                    return;
+                }
+            } else if (stackSize == 1 && localsSize == prevFrame.localsSize && equals(locals, prevFrame.locals, localsSize)) {
+                if (offsetDelta < 64) {  //same locals 1 stack item frame
+                    out.writeU1(64 + offsetDelta);
+                } else {  //same locals 1 stack item extended frame
+                    out.writeU1(247);
+                    out.writeU2(offsetDelta);
+                }
+                stack[0].writeTo(out, cp);
+                return;
+            }
+            //full frame
+            out.writeU1(255);
+            out.writeU2(offsetDelta);
+            out.writeU2(localsSize);
+            for (int i=0; i<localsSize; i++) locals[i].writeTo(out, cp);
+            out.writeU2(stackSize);
+            for (int i=0; i<stackSize; i++) stack[i].writeTo(out, cp);
+        }
+    }
+
+    private static record Type(int tag, ClassDesc sym, int bci) {
+
+        //singleton types
+        static final Type TOP_TYPE = simpleType(ITEM_TOP),
+                NULL_TYPE = simpleType(ITEM_NULL),
+                INTEGER_TYPE = simpleType(ITEM_INTEGER),
+                FLOAT_TYPE = simpleType(ITEM_FLOAT),
+                LONG_TYPE = simpleType(ITEM_LONG),
+                LONG2_TYPE = simpleType(ITEM_LONG_2ND),
+                DOUBLE_TYPE = simpleType(ITEM_DOUBLE),
+                BOOLEAN_TYPE = simpleType(ITEM_BOOLEAN),
+                BYTE_TYPE = simpleType(ITEM_BYTE),
+                CHAR_TYPE = simpleType(ITEM_CHAR),
+                SHORT_TYPE = simpleType(ITEM_SHORT),
+                DOUBLE2_TYPE = simpleType(ITEM_DOUBLE_2ND),
+                UNITIALIZED_THIS_TYPE = simpleType(ITEM_UNINITIALIZED_THIS);
+
+        //frequently used types to reduce footprint
+        static final Type OBJECT_TYPE = referenceType(CD_Object),
+            THROWABLE_TYPE = referenceType(CD_Throwable),
+            INT_ARRAY_TYPE = referenceType(CD_int.arrayType()),
+            BOOLEAN_ARRAY_TYPE = referenceType(CD_boolean.arrayType()),
+            BYTE_ARRAY_TYPE = referenceType(CD_byte.arrayType()),
+            CHAR_ARRAY_TYPE = referenceType(CD_char.arrayType()),
+            SHORT_ARRAY_TYPE = referenceType(CD_short.arrayType()),
+            LONG_ARRAY_TYPE = referenceType(CD_long.arrayType()),
+            DOUBLE_ARRAY_TYPE = referenceType(CD_double.arrayType()),
+            FLOAT_ARRAY_TYPE = referenceType(CD_float.arrayType()),
+            STRING_TYPE = referenceType(CD_String),
+            CLASS_TYPE = referenceType(CD_Class),
+            METHOD_HANDLE_TYPE = referenceType(CD_MethodHandle),
+            METHOD_TYPE = referenceType(CD_MethodType);
+
+        private static Type simpleType(int tag) {
+            return new Type(tag, null, 0);
+        }
+
+        static Type referenceType(ClassDesc desc) {
+            return new Type(ITEM_OBJECT, desc, 0);
+        }
+
+        static Type uninitializedType(int bci) {
+            return new Type(ITEM_UNINITIALIZED, null, bci);
+        }
+
+        @Override //mandatory override to avoid use of method reference during JDK bootstrap
+        public boolean equals(Object o) {
+            return (o instanceof Type t) && t.tag == tag && t.bci == bci && Objects.equals(sym, t.sym);
+        }
+
+        boolean isCategory2_2nd() {
+            return this == DOUBLE2_TYPE || this == LONG2_TYPE;
+        }
+
+        boolean isReference() {
+            return tag == ITEM_OBJECT || this == NULL_TYPE;
+        }
+
+        boolean isObject() {
+            return tag == ITEM_OBJECT && sym.isClassOrInterface();
+        }
+
+        boolean isArray() {
+            return tag == ITEM_OBJECT && sym.isArray();
+        }
+
+        Type mergeFrom(Type from, ClassHierarchyImpl context) {
+            if (this == TOP_TYPE || this == from || equals(from)) {
+                return this;
+            } else {
+                return switch (tag) {
+                    case ITEM_BOOLEAN, ITEM_BYTE, ITEM_CHAR, ITEM_SHORT ->
+                        from == INTEGER_TYPE ? this : TOP_TYPE;
+                    default ->
+                        isReference() && from.isReference() ? mergeReferenceFrom(from, context) : TOP_TYPE;
+                };
+            }
+        }
+
+        Type mergeComponentFrom(Type from, ClassHierarchyImpl context) {
+            if (this == TOP_TYPE || this == from || equals(from)) {
+                return this;
+            } else {
+                return switch (tag) {
+                    case ITEM_BOOLEAN, ITEM_BYTE, ITEM_CHAR, ITEM_SHORT ->
+                        TOP_TYPE;
+                    default ->
+                        isReference() && from.isReference() ? mergeReferenceFrom(from, context) : TOP_TYPE;
+                };
+            }
+        }
+
+        private static final ClassDesc CD_Cloneable = ClassDesc.of("java.lang.Cloneable");
+        private static final ClassDesc CD_Serializable = ClassDesc.of("java.io.Serializable");
+
+        private Type mergeReferenceFrom(Type from, ClassHierarchyImpl context) {
+            if (from == NULL_TYPE) {
+                return this;
+            } else if (this == NULL_TYPE) {
+                return from;
+            } else if (sym.equals(from.sym)) {
+                return this;
+            } else if (isObject()) {
+                if (CD_Object.equals(sym)) {
+                    return this;
+                }
+                if (context.isInterface(sym)) {
+                    if (!from.isArray() || CD_Cloneable.equals(sym) || CD_Serializable.equals(sym)) {
+                        return this;
+                    }
+                } else if (from.isObject()) {
+                    var anc = context.commonAncestor(sym, from.sym);
+                    return anc == null ? this : Type.referenceType(anc);
+                }
+            } else if (isArray() && from.isArray()) {
+                Type compThis = getComponent();
+                Type compFrom = from.getComponent();
+                if (compThis != TOP_TYPE && compFrom != TOP_TYPE) {
+                    return  compThis.mergeComponentFrom(compFrom, context).toArray();
+                }
+            }
+            return OBJECT_TYPE;
+        }
+
+        Type toArray() {
+            return switch (tag) {
+                case ITEM_BOOLEAN -> BOOLEAN_ARRAY_TYPE;
+                case ITEM_BYTE -> BYTE_ARRAY_TYPE;
+                case ITEM_CHAR -> CHAR_ARRAY_TYPE;
+                case ITEM_SHORT -> SHORT_ARRAY_TYPE;
+                case ITEM_INTEGER -> INT_ARRAY_TYPE;
+                case ITEM_LONG -> LONG_ARRAY_TYPE;
+                case ITEM_FLOAT -> FLOAT_ARRAY_TYPE;
+                case ITEM_DOUBLE -> DOUBLE_ARRAY_TYPE;
+                case ITEM_OBJECT -> Type.referenceType(sym.arrayType());
+                default -> OBJECT_TYPE;
+            };
+        }
+
+        Type getComponent() {
+            if (isArray()) {
+                var comp = sym.componentType();
+                if (comp.isPrimitive()) {
+                    return switch (comp.descriptorString().charAt(0)) {
+                        case 'Z' -> Type.BOOLEAN_TYPE;
+                        case 'B' -> Type.BYTE_TYPE;
+                        case 'C' -> Type.CHAR_TYPE;
+                        case 'S' -> Type.SHORT_TYPE;
+                        case 'I' -> Type.INTEGER_TYPE;
+                        case 'J' -> Type.LONG_TYPE;
+                        case 'F' -> Type.FLOAT_TYPE;
+                        case 'D' -> Type.DOUBLE_TYPE;
+                        default -> Type.TOP_TYPE;
+                    };
+                }
+                return Type.referenceType(comp);
+            }
+            return Type.TOP_TYPE;
+        }
+
+        void writeTo(BufWriter bw, ConstantPoolBuilder cp) {
+            bw.writeU1(tag);
+            switch (tag) {
+                case ITEM_OBJECT ->
+                    bw.writeU2(cp.classEntry(sym).index());
+                case ITEM_UNINITIALIZED ->
+                    bw.writeU2(bci);
+            }
+        }
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/classfile/impl/SuperclassImpl.class b/tests/test_data/std/jdk/internal/classfile/impl/SuperclassImpl.class
new file mode 100644
index 0000000000000000000000000000000000000000..ef004e70e3495289c1242384acb1db26366aabb0
GIT binary patch
literal 1502
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zp#GGdU80$(m^R<^8+Gn(>vfAP*@|Q6R!w(Jxo;Zd;*CicV7k&xJ`uc>Zizwb=)pP7
zFGpHsP(HY(;M)$v0@dH;E}xZZDPN=b`iXAm{x_T<A)J#jq^geZ8vGf(9Sp;rh0V&=
zVxI1F3{)fivhrTjdlaYdUX0N?PrEHTkI{do@Expp1m$I+_!a%1$rQtVTC)@YOwu}q
zBnfT+IV_N6Gz`N7Jfs}~1n`Vthp^ZLmuVTD^%lOM{}X+LkbQx1I)G6_hb9ceBP@|c
zGFvBa$t+ov(cdr}agy&T$SFY#BQD7nmn4?)m|z%6#5RQ6prR$0@$8lOPmI6nk*LSG
a&Tx!74Amp#PcvL>V>sSoxI!Q?to{WadWu{C

literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/classfile/impl/SuperclassImpl.java b/tests/test_data/std/jdk/internal/classfile/impl/SuperclassImpl.java
new file mode 100644
index 00000000..2e93c9b9
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/classfile/impl/SuperclassImpl.java
@@ -0,0 +1,56 @@
+/*
+ * Copyright (c) 2022, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package jdk.internal.classfile.impl;
+
+import java.lang.classfile.constantpool.ClassEntry;
+import java.lang.classfile.Superclass;
+
+import static java.util.Objects.requireNonNull;
+
+public final class SuperclassImpl
+        extends AbstractElement
+        implements Superclass {
+    private final ClassEntry superclassEntry;
+
+    public SuperclassImpl(ClassEntry superclassEntry) {
+        requireNonNull(superclassEntry);
+        this.superclassEntry = superclassEntry;
+    }
+
+    @Override
+    public ClassEntry superclassEntry() {
+        return superclassEntry;
+    }
+
+    @Override
+    public void writeTo(DirectClassBuilder builder) {
+        builder.setSuperclass(superclassEntry);
+    }
+
+    @Override
+    public String toString() {
+        return String.format("Superclass[superclassEntry=%s]", superclassEntry.name().stringValue());
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/classfile/impl/TargetInfoImpl$CatchTargetImpl.class b/tests/test_data/std/jdk/internal/classfile/impl/TargetInfoImpl$CatchTargetImpl.class
new file mode 100644
index 0000000000000000000000000000000000000000..d9d2004e98f6da9a9169699a4263b2e9eb49242c
GIT binary patch
literal 2001
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/classfile/impl/TargetInfoImpl$EmptyTargetImpl.class b/tests/test_data/std/jdk/internal/classfile/impl/TargetInfoImpl$EmptyTargetImpl.class
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GIT binary patch
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HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/classfile/impl/TargetInfoImpl$FormalParameterTargetImpl.class b/tests/test_data/std/jdk/internal/classfile/impl/TargetInfoImpl$FormalParameterTargetImpl.class
new file mode 100644
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diff --git a/tests/test_data/std/jdk/internal/classfile/impl/TargetInfoImpl$LocalVarTargetImpl.class b/tests/test_data/std/jdk/internal/classfile/impl/TargetInfoImpl$LocalVarTargetImpl.class
new file mode 100644
index 0000000000000000000000000000000000000000..8c1ca4fc2a9bc1d6c099029cc50d243fc3498ddb
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diff --git a/tests/test_data/std/jdk/internal/classfile/impl/TargetInfoImpl$LocalVarTargetInfoImpl.class b/tests/test_data/std/jdk/internal/classfile/impl/TargetInfoImpl$LocalVarTargetInfoImpl.class
new file mode 100644
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diff --git a/tests/test_data/std/jdk/internal/classfile/impl/TargetInfoImpl$OffsetTargetImpl.class b/tests/test_data/std/jdk/internal/classfile/impl/TargetInfoImpl$OffsetTargetImpl.class
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diff --git a/tests/test_data/std/jdk/internal/classfile/impl/TargetInfoImpl$SupertypeTargetImpl.class b/tests/test_data/std/jdk/internal/classfile/impl/TargetInfoImpl$SupertypeTargetImpl.class
new file mode 100644
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diff --git a/tests/test_data/std/jdk/internal/classfile/impl/TargetInfoImpl$ThrowsTargetImpl.class b/tests/test_data/std/jdk/internal/classfile/impl/TargetInfoImpl$ThrowsTargetImpl.class
new file mode 100644
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diff --git a/tests/test_data/std/jdk/internal/classfile/impl/TargetInfoImpl$TypeArgumentTargetImpl.class b/tests/test_data/std/jdk/internal/classfile/impl/TargetInfoImpl$TypeArgumentTargetImpl.class
new file mode 100644
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diff --git a/tests/test_data/std/jdk/internal/classfile/impl/TargetInfoImpl$TypeParameterBoundTargetImpl.class b/tests/test_data/std/jdk/internal/classfile/impl/TargetInfoImpl$TypeParameterBoundTargetImpl.class
new file mode 100644
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zbtxP6xz(6@{2>?Jpflh%nV(#EN$KN`w;Af$I0p$Nq6X6EG=<3%!}1wxqck`1d?)CK
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zUoqTBV;-S$8k!7q|E)p=Ry9>ab4D%$0%p2OeJL)z>RH3r4A)Y)Az9Y2!*FG|C=p4O
z1j{sX^C0FRhnoCe&`7GuAsw$YiD}j7U4wx!EYT?<`8=)D#_z}(OVx>L?GKC}qhib)
zqi)O|qw$=c$M8P=PoY5nYoxGFKpUuI6PIxpH|W+-W^fZGoycGe&*GhQU@YEA7jpQ3
z_7`#_0P;<W0u%H>SSHV;PjZ!tnsI^|;8)rz{9=5)8sq6oB*B}Y(f%Rb{9FBP;Fpoq
zuj8XceTBfJvn6Bc1oN-bpHeb|a7(y_kI4dcJw8b+neiDY7{8%1EQ&&6hEY0BqsS`P
zhsBU8Prp>TF^X~lpT=qW44=nq8DG#kNwrcWQWR1IvgoBsp{)@cs#w7)ZsQKN=yr}c
cVB-NE-f7TF8QW+O6(8VHaU75F1iNVb1EgbyuK)l5

literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/classfile/impl/TargetInfoImpl$TypeParameterTargetImpl.class b/tests/test_data/std/jdk/internal/classfile/impl/TargetInfoImpl$TypeParameterTargetImpl.class
new file mode 100644
index 0000000000000000000000000000000000000000..5b610d78a385299e2e55079fd6216770afe49fe7
GIT binary patch
literal 2337
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/classfile/impl/TargetInfoImpl.class b/tests/test_data/std/jdk/internal/classfile/impl/TargetInfoImpl.class
new file mode 100644
index 0000000000000000000000000000000000000000..00fa9004929e4da14f0127c5ffe7fff70396a029
GIT binary patch
literal 2407
zcmb7GZF3q`6n-v{Zc1pHCQVz~Sh1#+&=)kmmo_FLp`{X11&Q%>mgPb=S$1*RRr?40
zAI|s#^h@H{8U5~$a(ph(uwXN0VTNb#-E*FE?sLw)m%sn{<4*v2d>cmuQ4O&KCU8bz
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zvh3Jp-?9X5rAy<ixuyS3#W9WZ8fFr>fLVdNLm$J^yWOT~$!zsmN3Pkn<LRF1*o#%&
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zkTq>jy0&g*hea^k9V^?HzGyd{B8LL8ywgxsD4Dh_`|Y}Pt9sqy%xuXqbgQPjrWy|>
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zUZOVdu@R?XK6ndhUiaz~;g=Uac*=A1Hc=2KGDi@<^<LlRuljEQEFy-RxWlJJ-w1bc
zulF{KHwOei(I(2d<;?HUb~1-JckO3PDO~sk*Pml<_c`Wwk8pYR$|0_D{`w(aJHpMs
zGQZL*3KeaZ9AJVISmG_1A@}WG)Ks6D$uILgV=&!!dYLTaT|Pzd9%o~S%wMJD`+Sbz
z1AIul!aphZ@c=7W#X2@nz+*f?31vLx+d9`XjZaWnP0}ijDw4EK<1^w4u|`}a?hx0B
fpA$ETyTk(V3*uwqm&7N;uZSh$*TgdM8zlb)oifXO

literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/classfile/impl/TargetInfoImpl.java b/tests/test_data/std/jdk/internal/classfile/impl/TargetInfoImpl.java
new file mode 100644
index 00000000..3377e3eb
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/classfile/impl/TargetInfoImpl.java
@@ -0,0 +1,139 @@
+/*
+ * Copyright (c) 2022, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package jdk.internal.classfile.impl;
+
+import java.util.List;
+import java.util.Objects;
+import java.lang.classfile.Label;
+import java.lang.classfile.TypeAnnotation.*;
+import static java.lang.classfile.ClassFile.*;
+import static java.util.Objects.requireNonNull;
+
+public final class TargetInfoImpl {
+
+    private TargetInfoImpl() {
+    }
+
+    private static TargetType checkValid(TargetType targetType, int rangeFrom, int rangeTo) {
+        Objects.requireNonNull(targetType);
+        if (targetType.targetTypeValue() < rangeFrom || targetType.targetTypeValue() > rangeTo)
+            throw new IllegalArgumentException("Wrong target type specified " + targetType);
+        return targetType;
+    }
+
+    public record TypeParameterTargetImpl(TargetType targetType, int typeParameterIndex)
+            implements TypeParameterTarget {
+
+        public TypeParameterTargetImpl(TargetType targetType, int typeParameterIndex) {
+            this.targetType = checkValid(targetType, TAT_CLASS_TYPE_PARAMETER, TAT_METHOD_TYPE_PARAMETER);
+            this.typeParameterIndex = typeParameterIndex;
+        }
+    }
+
+    public record SupertypeTargetImpl(int supertypeIndex) implements SupertypeTarget {
+        @Override
+        public TargetType targetType() {
+            return TargetType.CLASS_EXTENDS;
+        }
+    }
+
+    public record TypeParameterBoundTargetImpl(TargetType targetType, int typeParameterIndex, int boundIndex)
+            implements TypeParameterBoundTarget {
+
+        public TypeParameterBoundTargetImpl(TargetType targetType, int typeParameterIndex, int boundIndex) {
+            this.targetType = checkValid(targetType, TAT_CLASS_TYPE_PARAMETER_BOUND, TAT_METHOD_TYPE_PARAMETER_BOUND);
+            this.typeParameterIndex = typeParameterIndex;
+            this.boundIndex = boundIndex;
+        }
+    }
+
+    public record EmptyTargetImpl(TargetType targetType) implements EmptyTarget {
+
+        public EmptyTargetImpl(TargetType targetType) {
+            this.targetType = checkValid(targetType, TAT_FIELD, TAT_METHOD_RECEIVER);
+        }
+    }
+
+    public record FormalParameterTargetImpl(int formalParameterIndex) implements FormalParameterTarget {
+        @Override
+        public TargetType targetType() {
+            return TargetType.METHOD_FORMAL_PARAMETER;
+        }
+    }
+
+    public record ThrowsTargetImpl(int throwsTargetIndex) implements ThrowsTarget {
+        @Override
+        public TargetType targetType() {
+            return TargetType.THROWS;
+        }
+    }
+
+    public record LocalVarTargetImpl(TargetType targetType, List<LocalVarTargetInfo> table)
+            implements LocalVarTarget {
+
+        public LocalVarTargetImpl(TargetType targetType, List<LocalVarTargetInfo> table) {
+            this.targetType = checkValid(targetType, TAT_LOCAL_VARIABLE, TAT_RESOURCE_VARIABLE);
+            this.table = List.copyOf(table);
+        }
+        @Override
+        public int size() {
+            return 2 + 6 * table.size();
+        }
+    }
+
+    public record LocalVarTargetInfoImpl(Label startLabel, Label endLabel, int index)
+            implements LocalVarTargetInfo {
+
+        public LocalVarTargetInfoImpl {
+            requireNonNull(startLabel);
+            requireNonNull(endLabel);
+        }
+    }
+
+    public record CatchTargetImpl(int exceptionTableIndex) implements CatchTarget {
+        @Override
+        public TargetType targetType() {
+            return TargetType.EXCEPTION_PARAMETER;
+        }
+    }
+
+    public record OffsetTargetImpl(TargetType targetType, Label target) implements OffsetTarget {
+
+        public OffsetTargetImpl(TargetType targetType, Label target) {
+            this.targetType = checkValid(targetType, TAT_INSTANCEOF, TAT_METHOD_REFERENCE);
+            this.target = requireNonNull(target);
+        }
+    }
+
+    public record TypeArgumentTargetImpl(TargetType targetType, Label target, int typeArgumentIndex)
+            implements TypeArgumentTarget {
+
+        public TypeArgumentTargetImpl(TargetType targetType, Label target, int typeArgumentIndex) {
+            this.targetType = checkValid(targetType, TAT_CAST, TAT_METHOD_REFERENCE_TYPE_ARGUMENT);
+            this.target = requireNonNull(target);
+            this.typeArgumentIndex = typeArgumentIndex;
+        }
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/classfile/impl/TemporaryConstantPool.class b/tests/test_data/std/jdk/internal/classfile/impl/TemporaryConstantPool.class
new file mode 100644
index 0000000000000000000000000000000000000000..b6c6ca5a82e7c0dade6aaa02cfc0fd2169a88aa8
GIT binary patch
literal 8679
zcmd5?`*$0~75>JL$gjk95=?_j<6_dtc0hSjH!@Ca*=}TPC&WrZAhfKdm9vhttFBf_
z41GZ#KpWZ;Xi5uh>4QE}C{Um(_#E1E`b$s$r*e8{cBLJyw9#&ww)_y?)oACN?>^?<
zJLCNGqYpj=kibS4TF@FnTMyc?iJ@;zxv0c)ioO~<zOtsKErv}Knyy)s46V_T(-Cwq
z#Md$xVw!HLrmo~->6}t5X0@Ce)AEH}Y-*)wnM&F^VHmkt-7?qjK4oRc#Z!`g??MD!
ze6enZ+3141oC}jS^rEHcR)G*=3FixkizlV`mn~D%SL2-0W`@adl#)b#RW&76J?Q1E
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zU_POwFDR?B4R>KUf|1a^STr)F8ec>?&K`#8a7ryHd38$9q}B^EsWIHktr}x^<9}<_
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zLpTt@=NOXVpm@eMvr1ZRggMSJCm43S<>ZuJEENidX{njx1=Un6&Cq8rr_};~=t7(q
zy(6J_h+T9fuTJtEGR?5>M%tv*JTXzsb-9>zVG6CC^fB9mIeea>Be}Gknp#TCG90*}
z%NoMPBS=!pbPW)oo=%svTt+n++7d=aW$0bdbakneUs27JLRpz%>w=M1a;Ftj<KLaZ
zHtW1rWauna>N>@R9MYA_EEQ`XGS%!CXJ7=mRhr_UkX@+L5Ef_HA5D%(ulS(K#hrlL
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z>=6NW4v*G@4HDSyGVb((o%99!f&lv>9&^AFjsto(Fm!gb@1wE5AyUR&UcfUFU~kn4
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zL$&aq^}<_$;ft{9;m2#?4}0OC2n=7sMF)O@wBh@`V*~NCW!(Q)dX_i)Qv%c8>>X8u
zci<8(69PjC>j9CT_C>NI_HjJnAk7g29uIz;u1I>yoW3k_2F=4)@KwTK_!_<*5c7E-
z%qQ^_A#lu!=f8n(2E@D;81q~Bwu32c|4DMUv;B{HUH!6TOnLi1?QH*N@GKdCC-jFJ
z7_(I>2(S8({0_eBD1HUc5ytlj%Pt!oxPtG~$PZ|w1<%u4SMh>FzgalFCh?YC_o9>T
ze~4=i(tg4ghW81~>jJ65s8YzT;zu+uh~97d=xsCM4u1(hCM;R+m+%uBvGsnL*gc6?
z0_y#46TN>LSnu~6>iskP++lJbNxq?5T3;9baZCS)5{H)RR&K$o_yx^j_$7YjU^MgM
z-z6m3i@(Ne0_ivSZ9t@d+z_b)zpHjN!$K?3m`qWkO1y&^-rF!Kln>J@zZXhh#~(<p
zVKe<7h}ZE)YLt3NzDcs5<Xa>MNWM*SkmR384v~C^<Svr$l8lmkkK`E1Ka<=`vP|+2
S$-j^sC;2|fNs=F6$G-vaRG72?

literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/classfile/impl/TemporaryConstantPool.java b/tests/test_data/std/jdk/internal/classfile/impl/TemporaryConstantPool.java
new file mode 100644
index 00000000..7b15489a
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/classfile/impl/TemporaryConstantPool.java
@@ -0,0 +1,202 @@
+/*
+ * Copyright (c) 2022, 2024, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package jdk.internal.classfile.impl;
+
+import java.lang.classfile.*;
+import java.lang.classfile.constantpool.ClassEntry;
+import java.lang.classfile.constantpool.ConstantDynamicEntry;
+import java.lang.classfile.constantpool.ConstantPool;
+import java.lang.classfile.constantpool.ConstantPoolBuilder;
+import java.lang.classfile.constantpool.DoubleEntry;
+import java.lang.classfile.constantpool.FieldRefEntry;
+import java.lang.classfile.constantpool.FloatEntry;
+import java.lang.classfile.constantpool.IntegerEntry;
+import java.lang.classfile.constantpool.InterfaceMethodRefEntry;
+import java.lang.classfile.constantpool.InvokeDynamicEntry;
+import java.lang.classfile.constantpool.LoadableConstantEntry;
+import java.lang.classfile.constantpool.LongEntry;
+import java.lang.classfile.constantpool.MemberRefEntry;
+import java.lang.classfile.constantpool.MethodHandleEntry;
+import java.lang.classfile.constantpool.MethodRefEntry;
+import java.lang.classfile.constantpool.MethodTypeEntry;
+import java.lang.classfile.constantpool.ModuleEntry;
+import java.lang.classfile.constantpool.NameAndTypeEntry;
+import java.lang.classfile.constantpool.PackageEntry;
+import java.lang.classfile.constantpool.PoolEntry;
+import java.lang.classfile.constantpool.StringEntry;
+import java.lang.classfile.constantpool.Utf8Entry;
+
+import java.lang.constant.MethodTypeDesc;
+import java.util.List;
+
+public final class TemporaryConstantPool implements ConstantPoolBuilder {
+
+    private TemporaryConstantPool() {}
+
+    public static final TemporaryConstantPool INSTANCE = new TemporaryConstantPool();
+
+    @Override
+    public Utf8Entry utf8Entry(String s) {
+        return new AbstractPoolEntry.Utf8EntryImpl(this, -1, s);
+    }
+
+    @Override
+    public IntegerEntry intEntry(int value) {
+        return new AbstractPoolEntry.IntegerEntryImpl(this, -1, value);
+    }
+
+    @Override
+    public FloatEntry floatEntry(float value) {
+        return new AbstractPoolEntry.FloatEntryImpl(this, -1, value);
+    }
+
+    @Override
+    public LongEntry longEntry(long value) {
+        return new AbstractPoolEntry.LongEntryImpl(this, -1, value);
+    }
+
+    @Override
+    public DoubleEntry doubleEntry(double value) {
+        return new AbstractPoolEntry.DoubleEntryImpl(this, -1, value);
+    }
+
+    @Override
+    public ClassEntry classEntry(Utf8Entry name) {
+        return new AbstractPoolEntry.ClassEntryImpl(this, -2, (AbstractPoolEntry.Utf8EntryImpl) name);
+    }
+
+    @Override
+    public PackageEntry packageEntry(Utf8Entry name) {
+        return new AbstractPoolEntry.PackageEntryImpl(this, -2, (AbstractPoolEntry.Utf8EntryImpl) name);
+    }
+
+    @Override
+    public ModuleEntry moduleEntry(Utf8Entry name) {
+        return new AbstractPoolEntry.ModuleEntryImpl(this, -2, (AbstractPoolEntry.Utf8EntryImpl) name);
+    }
+
+    @Override
+    public NameAndTypeEntry nameAndTypeEntry(Utf8Entry nameEntry, Utf8Entry typeEntry) {
+        return new AbstractPoolEntry.NameAndTypeEntryImpl(this, -3,
+                                                          (AbstractPoolEntry.Utf8EntryImpl) nameEntry,
+                                                          (AbstractPoolEntry.Utf8EntryImpl) typeEntry);
+    }
+
+    @Override
+    public FieldRefEntry fieldRefEntry(ClassEntry owner, NameAndTypeEntry nameAndType) {
+        return new AbstractPoolEntry.FieldRefEntryImpl(this, -3,
+                                                       (AbstractPoolEntry.ClassEntryImpl) owner,
+                                                       (AbstractPoolEntry.NameAndTypeEntryImpl) nameAndType);
+    }
+
+    @Override
+    public MethodRefEntry methodRefEntry(ClassEntry owner, NameAndTypeEntry nameAndType) {
+        return new AbstractPoolEntry.MethodRefEntryImpl(this, -3,
+                                                        (AbstractPoolEntry.ClassEntryImpl) owner,
+                                                        (AbstractPoolEntry.NameAndTypeEntryImpl) nameAndType);
+    }
+
+    @Override
+    public InterfaceMethodRefEntry interfaceMethodRefEntry(ClassEntry owner, NameAndTypeEntry nameAndType) {
+        return new AbstractPoolEntry.InterfaceMethodRefEntryImpl(this, -3,
+                                                                 (AbstractPoolEntry.ClassEntryImpl) owner,
+                                                                 (AbstractPoolEntry.NameAndTypeEntryImpl) nameAndType);
+    }
+
+    @Override
+    public MethodTypeEntry methodTypeEntry(MethodTypeDesc descriptor) {
+        throw new UnsupportedOperationException();
+    }
+
+    @Override
+    public MethodTypeEntry methodTypeEntry(Utf8Entry descriptor) {
+        throw new UnsupportedOperationException();
+    }
+
+    @Override
+    public MethodHandleEntry methodHandleEntry(int refKind, MemberRefEntry reference) {
+        throw new UnsupportedOperationException();
+    }
+
+    @Override
+    public InvokeDynamicEntry invokeDynamicEntry(BootstrapMethodEntry bootstrapMethodEntry, NameAndTypeEntry nameAndType) {
+        throw new UnsupportedOperationException();
+    }
+
+    @Override
+    public ConstantDynamicEntry constantDynamicEntry(BootstrapMethodEntry bootstrapMethodEntry, NameAndTypeEntry nameAndType) {
+        throw new UnsupportedOperationException();
+    }
+
+    @Override
+    public StringEntry stringEntry(Utf8Entry utf8) {
+        return new AbstractPoolEntry.StringEntryImpl(this, -2, (AbstractPoolEntry.Utf8EntryImpl) utf8);
+    }
+
+    @Override
+    public BootstrapMethodEntry bsmEntry(MethodHandleEntry methodReference, List<LoadableConstantEntry> arguments) {
+        throw new UnsupportedOperationException();
+    }
+
+    @Override
+    public PoolEntry entryByIndex(int index) {
+        throw new UnsupportedOperationException();
+    }
+
+    @Override
+    public int size() {
+        throw new UnsupportedOperationException();
+    }
+
+    @Override
+    public <T extends PoolEntry> T entryByIndex(int index, Class<T> cls) {
+        throw new UnsupportedOperationException();
+    }
+
+    @Override
+    public BootstrapMethodEntry bootstrapMethodEntry(int index) {
+        throw new UnsupportedOperationException();
+    }
+
+    @Override
+    public int bootstrapMethodCount() {
+        throw new UnsupportedOperationException();
+    }
+
+    @Override
+    public boolean canWriteDirect(ConstantPool constantPool) {
+        return false;
+    }
+
+    @Override
+    public boolean writeBootstrapMethods(BufWriter buf) {
+        throw new UnsupportedOperationException();
+    }
+
+    @Override
+    public void writeTo(BufWriter buf) {
+        throw new UnsupportedOperationException();
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/classfile/impl/TerminalCodeBuilder.class b/tests/test_data/std/jdk/internal/classfile/impl/TerminalCodeBuilder.class
new file mode 100644
index 0000000000000000000000000000000000000000..2f5b9ababa0ca8848e05ccb56c26fe53bdba6cbf
GIT binary patch
literal 400
zcmaiwO-chn5QSfjn%2ahs2g`~<3jrmi3mbKA-O<Lca8MenF&4J;@Mny01qWrvWWqS
zoBD&Q_tpFQ{`dqi!G%IW(6xKjzDXP#6SNJc>na~u`^7ToImd;U`J{C`&OSJf3j2g%
zZQhIyrg_m%Wz9Az^a$6R>E_PX>LFpYOK)mQ7BQiDPlSQZao#Sctu=wLH@bNw^k;33
zmLCL>aP<e@-3o$m`Mg3;iQO!hYZ~qp&Iq@=^zVI?XSR^f|FLMCtBNDLUrS<z;G)0*
YlsHXd*b(|t6&S4JF-|1+q(8;*2U`Aing9R*

literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/classfile/impl/TerminalCodeBuilder.java b/tests/test_data/std/jdk/internal/classfile/impl/TerminalCodeBuilder.java
new file mode 100644
index 00000000..6e3ca516
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/classfile/impl/TerminalCodeBuilder.java
@@ -0,0 +1,32 @@
+/*
+ * Copyright (c) 2022, 2024, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package jdk.internal.classfile.impl;
+
+import java.lang.classfile.CodeBuilder;
+
+public sealed interface TerminalCodeBuilder extends CodeBuilder, LabelContext
+        permits DirectCodeBuilder, BufferedCodeBuilder {
+    int curTopLocal();
+}
diff --git a/tests/test_data/std/jdk/internal/classfile/impl/TerminalFieldBuilder.class b/tests/test_data/std/jdk/internal/classfile/impl/TerminalFieldBuilder.class
new file mode 100644
index 0000000000000000000000000000000000000000..ecd87de5d916e970032f442c2b6e0f388daae70c
GIT binary patch
literal 329
zcmah_I}XAy41M7jC?6p)v2lWiGXP=*2`-Q}E=oxYN)rypzyUZEBCyZ_!C+gq^nSiS
zt~UTnj5rz$^IRQ;E*;rY8j%`VRhc#<ba6IfPqxtEzSd;a!fT_*a<mx6xx7eWWO)#q
zB&XDIbQorz>xZb0Wr%hsZ&O+a35Mx6{`f`0FxkGeog=mL$(xNTjy^;D%kWCuV5Tm~
iG5iy9;j@e^sX8izVQ7YGhgSg&@OST`7iK5y5e845>0_b*

literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/classfile/impl/TerminalFieldBuilder.java b/tests/test_data/std/jdk/internal/classfile/impl/TerminalFieldBuilder.java
new file mode 100644
index 00000000..b9fbf7fe
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/classfile/impl/TerminalFieldBuilder.java
@@ -0,0 +1,32 @@
+/*
+ * Copyright (c) 2022, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package jdk.internal.classfile.impl;
+
+import java.lang.classfile.FieldBuilder;
+
+public sealed interface TerminalFieldBuilder
+        extends FieldBuilder
+        permits DirectFieldBuilder, BufferedFieldBuilder {
+}
diff --git a/tests/test_data/std/jdk/internal/classfile/impl/TerminalMethodBuilder.class b/tests/test_data/std/jdk/internal/classfile/impl/TerminalMethodBuilder.class
new file mode 100644
index 0000000000000000000000000000000000000000..97ec7f8e8828da6cdbf5ff9a1a7c40a510f28fe1
GIT binary patch
literal 449
zcmah`%TB{E5S(qHh61G$H*USb1&ecUE#lOwi1GtYya5L{L5{=6ao_{^D8!}$RS{Kt
zSU*;t*_rXz_s1uIDTWFi!fkF}wJRcr!g!r}Q&pMstljF(>n9E?C;d6cm(osZ=Pd_?
z1Hv#j??!u5JnKc0a~c(TgwdwEVQPU17fGFE9N11v%fFO_$E(>kZ1ZL=<;T~vT|y`S
zImd+lvaCbO_u_|exz)@~GgU-AG)`k=yR4J7bgmT6_QdlywdGLZoS=7!y>meVYk?#?
cLRacgzJ?@Ug(Eq2aJ*joIFY?4_frgh05xEYng9R*

literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/classfile/impl/TerminalMethodBuilder.java b/tests/test_data/std/jdk/internal/classfile/impl/TerminalMethodBuilder.java
new file mode 100644
index 00000000..636b12a9
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/classfile/impl/TerminalMethodBuilder.java
@@ -0,0 +1,34 @@
+/*
+ * Copyright (c) 2022, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package jdk.internal.classfile.impl;
+
+import java.lang.classfile.CodeModel;
+import java.lang.classfile.MethodBuilder;
+
+public sealed interface TerminalMethodBuilder
+        extends MethodBuilder
+        permits BufferedMethodBuilder, DirectMethodBuilder {
+    BufferedCodeBuilder bufferedCodeBuilder(CodeModel original);
+}
diff --git a/tests/test_data/std/jdk/internal/classfile/impl/TransformImpl$ChainedClassTransform.class b/tests/test_data/std/jdk/internal/classfile/impl/TransformImpl$ChainedClassTransform.class
new file mode 100644
index 0000000000000000000000000000000000000000..767d8723f9b0dd8047eb91682af2b64dd3eb1210
GIT binary patch
literal 3893
zcmb_fZFdtz6n-Xcvq`$8r9!2syjieGfCWLtrWR=cTPX$m5_yrzCYiR|Zg#`I6!0JT
zU;H5FhzOkH@w0!y|Kjn^?qstiFOA}d?C#u|``kOvJacFA=ije>2T;Th86?oBpkKuR
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zcik|#X4LAYw&LiPyKXzRd1_4*H+93})uI>^^)N7xVPc^fwTZENWI;sUr(#%y?YH<7
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z(7Le`=R*b@#5fKscu&Rq_<-S3#~JMrogr1RE!VGchvDd?oQCfirnc@|70<9OttbZ+
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/classfile/impl/TransformImpl$ChainedCodeTransform.class b/tests/test_data/std/jdk/internal/classfile/impl/TransformImpl$ChainedCodeTransform.class
new file mode 100644
index 0000000000000000000000000000000000000000..38a65584fa002d52df8681197e9bb5285a28f333
GIT binary patch
literal 3683
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/classfile/impl/TransformImpl$ChainedFieldTransform.class b/tests/test_data/std/jdk/internal/classfile/impl/TransformImpl$ChainedFieldTransform.class
new file mode 100644
index 0000000000000000000000000000000000000000..9f522c84d253895b3a7a8ad0826cb55cbaaf0d4a
GIT binary patch
literal 3704
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diff --git a/tests/test_data/std/jdk/internal/classfile/impl/TransformImpl$MethodCodeTransform.class b/tests/test_data/std/jdk/internal/classfile/impl/TransformImpl$MethodCodeTransform.class
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diff --git a/tests/test_data/std/jdk/internal/classfile/impl/TransformImpl$ResolvedTransformImpl.class b/tests/test_data/std/jdk/internal/classfile/impl/TransformImpl$ResolvedTransformImpl.class
new file mode 100644
index 0000000000000000000000000000000000000000..01495789128a35e5b2b9ade11877b0597bffa1ff
GIT binary patch
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diff --git a/tests/test_data/std/jdk/internal/classfile/impl/TransformImpl$SupplierClassTransform.class b/tests/test_data/std/jdk/internal/classfile/impl/TransformImpl$SupplierClassTransform.class
new file mode 100644
index 0000000000000000000000000000000000000000..a70df56d43cc0f7a2c9bfffee159998d28f38e52
GIT binary patch
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diff --git a/tests/test_data/std/jdk/internal/classfile/impl/TransformImpl$SupplierCodeTransform.class b/tests/test_data/std/jdk/internal/classfile/impl/TransformImpl$SupplierCodeTransform.class
new file mode 100644
index 0000000000000000000000000000000000000000..0f5a52017e799cd0a96596d14ff88e9427c9e2e3
GIT binary patch
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diff --git a/tests/test_data/std/jdk/internal/classfile/impl/TransformImpl$SupplierFieldTransform.class b/tests/test_data/std/jdk/internal/classfile/impl/TransformImpl$SupplierFieldTransform.class
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diff --git a/tests/test_data/std/jdk/internal/classfile/impl/TransformImpl$SupplierMethodTransform.class b/tests/test_data/std/jdk/internal/classfile/impl/TransformImpl$SupplierMethodTransform.class
new file mode 100644
index 0000000000000000000000000000000000000000..c6d5dbf3fd2fbb829f40ee2fb535ecbec0fd94f5
GIT binary patch
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diff --git a/tests/test_data/std/jdk/internal/classfile/impl/TransformImpl$UnresolvedClassTransform.class b/tests/test_data/std/jdk/internal/classfile/impl/TransformImpl$UnresolvedClassTransform.class
new file mode 100644
index 0000000000000000000000000000000000000000..d3d6e78d97c272cf07e3ba74bc34bceeb6d84a43
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diff --git a/tests/test_data/std/jdk/internal/classfile/impl/TransformImpl$UnresolvedMethodTransform.class b/tests/test_data/std/jdk/internal/classfile/impl/TransformImpl$UnresolvedMethodTransform.class
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diff --git a/tests/test_data/std/jdk/internal/classfile/impl/TransformImpl.java b/tests/test_data/std/jdk/internal/classfile/impl/TransformImpl.java
new file mode 100644
index 00000000..1677d421
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/classfile/impl/TransformImpl.java
@@ -0,0 +1,299 @@
+/*
+ * Copyright (c) 2022, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package jdk.internal.classfile.impl;
+
+import java.util.function.Consumer;
+import java.util.function.Predicate;
+import java.util.function.Supplier;
+
+import java.lang.classfile.ClassBuilder;
+import java.lang.classfile.ClassElement;
+import java.lang.classfile.ClassTransform;
+import java.lang.classfile.ClassFileElement;
+import java.lang.classfile.ClassFileTransform;
+import java.lang.classfile.CodeBuilder;
+import java.lang.classfile.CodeElement;
+import java.lang.classfile.CodeModel;
+import java.lang.classfile.CodeTransform;
+import java.lang.classfile.FieldBuilder;
+import java.lang.classfile.FieldElement;
+import java.lang.classfile.FieldModel;
+import java.lang.classfile.FieldTransform;
+import java.lang.classfile.MethodBuilder;
+import java.lang.classfile.MethodElement;
+import java.lang.classfile.MethodModel;
+import java.lang.classfile.MethodTransform;
+
+public class TransformImpl {
+    // ClassTransform
+
+    private TransformImpl() {
+    }
+
+    private static Runnable chainRunnable(Runnable a, Runnable b) {
+        return () -> { a.run(); b.run(); };
+    }
+
+    private static final Runnable NOTHING = () -> { };
+
+    interface UnresolvedClassTransform extends ClassTransform {
+        @Override
+        default void accept(ClassBuilder builder, ClassElement element) {
+            throw new UnsupportedOperationException("transforms must be resolved before running");
+        }
+
+        @Override
+        default void atEnd(ClassBuilder builder) {
+            throw new UnsupportedOperationException("transforms must be resolved before running");
+        }
+
+        @Override
+        default void atStart(ClassBuilder builder) {
+            throw new UnsupportedOperationException("transforms must be resolved before running");
+        }
+    }
+
+    public record ResolvedTransformImpl<E extends ClassFileElement>(Consumer<E> consumer,
+                                     Runnable endHandler,
+                                     Runnable startHandler)
+            implements ClassFileTransform.ResolvedTransform<E> {
+
+        public ResolvedTransformImpl(Consumer<E> consumer) {
+            this(consumer, NOTHING, NOTHING);
+        }
+    }
+
+    public record ChainedClassTransform(ClassTransform t,
+                                        ClassTransform next)
+            implements UnresolvedClassTransform {
+        @Override
+        public ResolvedTransformImpl<ClassElement> resolve(ClassBuilder builder) {
+            ResolvedTransform<ClassElement> downstream = next.resolve(builder);
+            ClassBuilder chainedBuilder = new ChainedClassBuilder(builder, downstream.consumer());
+            ResolvedTransform<ClassElement> upstream = t.resolve(chainedBuilder);
+            return new ResolvedTransformImpl<>(upstream.consumer(),
+                                          chainRunnable(upstream.endHandler(), downstream.endHandler()),
+                                          chainRunnable(upstream.startHandler(), downstream.startHandler()));
+        }
+    }
+
+    public record SupplierClassTransform(Supplier<ClassTransform> supplier)
+            implements UnresolvedClassTransform {
+        @Override
+        public ResolvedTransform<ClassElement> resolve(ClassBuilder builder) {
+            return supplier.get().resolve(builder);
+        }
+    }
+
+    public record ClassMethodTransform(MethodTransform transform,
+                                       Predicate<MethodModel> filter)
+            implements UnresolvedClassTransform {
+        @Override
+        public ResolvedTransform<ClassElement> resolve(ClassBuilder builder) {
+            return new ResolvedTransformImpl<>(ce -> {
+                if (ce instanceof MethodModel mm && filter.test(mm))
+                    builder.transformMethod(mm, transform);
+                else
+                    builder.with(ce);
+            });
+        }
+
+        @Override
+        public ClassTransform andThen(ClassTransform next) {
+            if (next instanceof ClassMethodTransform cmt)
+                return new ClassMethodTransform(transform.andThen(cmt.transform),
+                                                mm -> filter.test(mm) && cmt.filter.test(mm));
+            else
+                return UnresolvedClassTransform.super.andThen(next);
+        }
+    }
+
+    public record ClassFieldTransform(FieldTransform transform,
+                                      Predicate<FieldModel> filter)
+            implements UnresolvedClassTransform {
+        @Override
+        public ResolvedTransform<ClassElement> resolve(ClassBuilder builder) {
+            return new ResolvedTransformImpl<>(ce -> {
+                if (ce instanceof FieldModel fm && filter.test(fm))
+                    builder.transformField(fm, transform);
+                else
+                    builder.with(ce);
+            });
+        }
+
+        @Override
+        public ClassTransform andThen(ClassTransform next) {
+            if (next instanceof ClassFieldTransform cft)
+                return new ClassFieldTransform(transform.andThen(cft.transform),
+                                               mm -> filter.test(mm) && cft.filter.test(mm));
+            else
+                return UnresolvedClassTransform.super.andThen(next);
+        }
+    }
+
+    // MethodTransform
+
+    interface UnresolvedMethodTransform extends MethodTransform {
+        @Override
+        default void accept(MethodBuilder builder, MethodElement element) {
+            throw new UnsupportedOperationException("transforms must be resolved before running");
+        }
+
+        @Override
+        default void atEnd(MethodBuilder builder) {
+            throw new UnsupportedOperationException("transforms must be resolved before running");
+        }
+
+        @Override
+        default void atStart(MethodBuilder builder) {
+            throw new UnsupportedOperationException("transforms must be resolved before running");
+        }
+    }
+
+    public record ChainedMethodTransform(MethodTransform t,
+                                         MethodTransform next)
+            implements TransformImpl.UnresolvedMethodTransform {
+        @Override
+        public ResolvedTransform<MethodElement> resolve(MethodBuilder builder) {
+            ResolvedTransform<MethodElement> downstream = next.resolve(builder);
+            MethodBuilder chainedBuilder = new ChainedMethodBuilder(builder, downstream.consumer());
+            ResolvedTransform<MethodElement> upstream = t.resolve(chainedBuilder);
+            return new ResolvedTransformImpl<>(upstream.consumer(),
+                                           chainRunnable(upstream.endHandler(), downstream.endHandler()),
+                                           chainRunnable(upstream.startHandler(), downstream.startHandler()));
+        }
+    }
+
+    public record SupplierMethodTransform(Supplier<MethodTransform> supplier)
+            implements TransformImpl.UnresolvedMethodTransform {
+        @Override
+        public ResolvedTransform<MethodElement> resolve(MethodBuilder builder) {
+            return supplier.get().resolve(builder);
+        }
+    }
+
+    public record MethodCodeTransform(CodeTransform xform)
+            implements TransformImpl.UnresolvedMethodTransform {
+        @Override
+        public ResolvedTransform<MethodElement> resolve(MethodBuilder builder) {
+            return new ResolvedTransformImpl<>(me -> {
+                if (me instanceof CodeModel cm) {
+                    builder.transformCode(cm, xform);
+                }
+                else {
+                    builder.with(me);
+                }
+            }, NOTHING, NOTHING);
+        }
+
+        @Override
+        public MethodTransform andThen(MethodTransform next) {
+            return (next instanceof TransformImpl.MethodCodeTransform mct)
+                   ? new TransformImpl.MethodCodeTransform(xform.andThen(mct.xform))
+                   : UnresolvedMethodTransform.super.andThen(next);
+
+        }
+    }
+
+    // FieldTransform
+
+    interface UnresolvedFieldTransform extends FieldTransform {
+        @Override
+        default void accept(FieldBuilder builder, FieldElement element) {
+            throw new UnsupportedOperationException("transforms must be resolved before running");
+        }
+
+        @Override
+        default void atEnd(FieldBuilder builder) {
+            throw new UnsupportedOperationException("transforms must be resolved before running");
+        }
+
+        @Override
+        default void atStart(FieldBuilder builder) {
+            throw new UnsupportedOperationException("transforms must be resolved before running");
+        }
+    }
+
+    public record ChainedFieldTransform(FieldTransform t, FieldTransform next)
+            implements UnresolvedFieldTransform {
+        @Override
+        public ResolvedTransform<FieldElement> resolve(FieldBuilder builder) {
+            ResolvedTransform<FieldElement> downstream = next.resolve(builder);
+            FieldBuilder chainedBuilder = new ChainedFieldBuilder(builder, downstream.consumer());
+            ResolvedTransform<FieldElement> upstream = t.resolve(chainedBuilder);
+            return new ResolvedTransformImpl<>(upstream.consumer(),
+                                           chainRunnable(upstream.endHandler(), downstream.endHandler()),
+                                           chainRunnable(upstream.startHandler(), downstream.startHandler()));
+        }
+    }
+
+    public record SupplierFieldTransform(Supplier<FieldTransform> supplier)
+            implements UnresolvedFieldTransform {
+        @Override
+        public ResolvedTransform<FieldElement> resolve(FieldBuilder builder) {
+            return supplier.get().resolve(builder);
+        }
+    }
+
+    // CodeTransform
+
+    interface UnresolvedCodeTransform extends CodeTransform {
+        @Override
+        default void accept(CodeBuilder builder, CodeElement element) {
+            throw new UnsupportedOperationException("transforms must be resolved before running");
+        }
+
+        @Override
+        default void atEnd(CodeBuilder builder) {
+            throw new UnsupportedOperationException("transforms must be resolved before running");
+        }
+
+        @Override
+        default void atStart(CodeBuilder builder) {
+            throw new UnsupportedOperationException("transforms must be resolved before running");
+        }
+    }
+
+    public record ChainedCodeTransform(CodeTransform t, CodeTransform next)
+            implements UnresolvedCodeTransform {
+        @Override
+        public ResolvedTransform<CodeElement> resolve(CodeBuilder builder) {
+            ResolvedTransform<CodeElement> downstream = next.resolve(builder);
+            CodeBuilder chainedBuilder = new ChainedCodeBuilder(builder, downstream.consumer());
+            ResolvedTransform<CodeElement> upstream = t.resolve(chainedBuilder);
+            return new ResolvedTransformImpl<>(upstream.consumer(),
+                                         chainRunnable(upstream.endHandler(), downstream.endHandler()),
+                                         chainRunnable(upstream.startHandler(), downstream.startHandler()));
+        }
+    }
+
+    public record SupplierCodeTransform(Supplier<CodeTransform> supplier)
+            implements UnresolvedCodeTransform {
+        @Override
+        public ResolvedTransform<CodeElement> resolve(CodeBuilder builder) {
+            return supplier.get().resolve(builder);
+        }
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/classfile/impl/UnboundAttribute$AdHocAttribute.class b/tests/test_data/std/jdk/internal/classfile/impl/UnboundAttribute$AdHocAttribute.class
new file mode 100644
index 0000000000000000000000000000000000000000..33b0bb36bdc58d48a55d6730202202bbbaa9f6bc
GIT binary patch
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literal 0
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diff --git a/tests/test_data/std/jdk/internal/classfile/impl/UnboundAttribute$EmptyBootstrapAttribute.class b/tests/test_data/std/jdk/internal/classfile/impl/UnboundAttribute$EmptyBootstrapAttribute.class
new file mode 100644
index 0000000000000000000000000000000000000000..f9796b95a35c100a873ee67447edda25b97f68b1
GIT binary patch
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literal 0
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diff --git a/tests/test_data/std/jdk/internal/classfile/impl/UnboundAttribute$TypePathComponentImpl.class b/tests/test_data/std/jdk/internal/classfile/impl/UnboundAttribute$TypePathComponentImpl.class
new file mode 100644
index 0000000000000000000000000000000000000000..abca17e7ab5384ba38e77f0d97ce78791917d20e
GIT binary patch
literal 2203
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/classfile/impl/UnboundAttribute$UnboundAnnotationDefaultAttribute.class b/tests/test_data/std/jdk/internal/classfile/impl/UnboundAttribute$UnboundAnnotationDefaultAttribute.class
new file mode 100644
index 0000000000000000000000000000000000000000..53a41ce8520ca5152238201b6149a3f5bdd1ac60
GIT binary patch
literal 1152
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literal 0
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diff --git a/tests/test_data/std/jdk/internal/classfile/impl/UnboundAttribute$UnboundCharacterRangeInfo.class b/tests/test_data/std/jdk/internal/classfile/impl/UnboundAttribute$UnboundCharacterRangeInfo.class
new file mode 100644
index 0000000000000000000000000000000000000000..b64b41634c1ca561bc9e1ec98dd27bd27e58b1de
GIT binary patch
literal 2288
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literal 0
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diff --git a/tests/test_data/std/jdk/internal/classfile/impl/UnboundAttribute$UnboundCharacterRangeTableAttribute.class b/tests/test_data/std/jdk/internal/classfile/impl/UnboundAttribute$UnboundCharacterRangeTableAttribute.class
new file mode 100644
index 0000000000000000000000000000000000000000..10ad02e99d4d63df3027a79942013bbdffb2e4fe
GIT binary patch
literal 1467
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literal 0
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diff --git a/tests/test_data/std/jdk/internal/classfile/impl/UnboundAttribute$UnboundCompilationIDAttribute.class b/tests/test_data/std/jdk/internal/classfile/impl/UnboundAttribute$UnboundCompilationIDAttribute.class
new file mode 100644
index 0000000000000000000000000000000000000000..c1aa0a49a427a75cbc8019f78795e7b92a7f2f42
GIT binary patch
literal 1140
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literal 0
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diff --git a/tests/test_data/std/jdk/internal/classfile/impl/UnboundAttribute$UnboundConstantValueAttribute.class b/tests/test_data/std/jdk/internal/classfile/impl/UnboundAttribute$UnboundConstantValueAttribute.class
new file mode 100644
index 0000000000000000000000000000000000000000..38405509c0c933cc1556614283c141255588b59d
GIT binary patch
literal 1176
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literal 0
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diff --git a/tests/test_data/std/jdk/internal/classfile/impl/UnboundAttribute$UnboundDeprecatedAttribute.class b/tests/test_data/std/jdk/internal/classfile/impl/UnboundAttribute$UnboundDeprecatedAttribute.class
new file mode 100644
index 0000000000000000000000000000000000000000..c009fc3569001d686f39c5dee3b9d6343f1fa6c9
GIT binary patch
literal 871
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literal 0
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diff --git a/tests/test_data/std/jdk/internal/classfile/impl/UnboundAttribute$UnboundEnclosingMethodAttribute.class b/tests/test_data/std/jdk/internal/classfile/impl/UnboundAttribute$UnboundEnclosingMethodAttribute.class
new file mode 100644
index 0000000000000000000000000000000000000000..8ce199dbb0abd325ed12cbe7cf53521128e8b958
GIT binary patch
literal 1593
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literal 0
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diff --git a/tests/test_data/std/jdk/internal/classfile/impl/UnboundAttribute$UnboundExceptionsAttribute.class b/tests/test_data/std/jdk/internal/classfile/impl/UnboundAttribute$UnboundExceptionsAttribute.class
new file mode 100644
index 0000000000000000000000000000000000000000..fed9d025128c36afcea2e5ae0f9bde8220c83baf
GIT binary patch
literal 1380
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diff --git a/tests/test_data/std/jdk/internal/classfile/impl/UnboundAttribute$UnboundInnerClassInfo.class b/tests/test_data/std/jdk/internal/classfile/impl/UnboundAttribute$UnboundInnerClassInfo.class
new file mode 100644
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diff --git a/tests/test_data/std/jdk/internal/classfile/impl/UnboundAttribute$UnboundInnerClassesAttribute.class b/tests/test_data/std/jdk/internal/classfile/impl/UnboundAttribute$UnboundInnerClassesAttribute.class
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diff --git a/tests/test_data/std/jdk/internal/classfile/impl/UnboundAttribute$UnboundLineNumberInfo.class b/tests/test_data/std/jdk/internal/classfile/impl/UnboundAttribute$UnboundLineNumberInfo.class
new file mode 100644
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diff --git a/tests/test_data/std/jdk/internal/classfile/impl/UnboundAttribute$UnboundLineNumberTableAttribute.class b/tests/test_data/std/jdk/internal/classfile/impl/UnboundAttribute$UnboundLineNumberTableAttribute.class
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GIT binary patch
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diff --git a/tests/test_data/std/jdk/internal/classfile/impl/UnboundAttribute$UnboundLocalVariableInfo.class b/tests/test_data/std/jdk/internal/classfile/impl/UnboundAttribute$UnboundLocalVariableInfo.class
new file mode 100644
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GIT binary patch
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diff --git a/tests/test_data/std/jdk/internal/classfile/impl/UnboundAttribute$UnboundLocalVariableTableAttribute.class b/tests/test_data/std/jdk/internal/classfile/impl/UnboundAttribute$UnboundLocalVariableTableAttribute.class
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diff --git a/tests/test_data/std/jdk/internal/classfile/impl/UnboundAttribute$UnboundLocalVariableTypeInfo.class b/tests/test_data/std/jdk/internal/classfile/impl/UnboundAttribute$UnboundLocalVariableTypeInfo.class
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diff --git a/tests/test_data/std/jdk/internal/classfile/impl/UnboundAttribute$UnboundLocalVariableTypeTableAttribute.class b/tests/test_data/std/jdk/internal/classfile/impl/UnboundAttribute$UnboundLocalVariableTypeTableAttribute.class
new file mode 100644
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diff --git a/tests/test_data/std/jdk/internal/classfile/impl/UnboundAttribute$UnboundMethodParameterInfo.class b/tests/test_data/std/jdk/internal/classfile/impl/UnboundAttribute$UnboundMethodParameterInfo.class
new file mode 100644
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GIT binary patch
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diff --git a/tests/test_data/std/jdk/internal/classfile/impl/UnboundAttribute$UnboundMethodParametersAttribute.class b/tests/test_data/std/jdk/internal/classfile/impl/UnboundAttribute$UnboundMethodParametersAttribute.class
new file mode 100644
index 0000000000000000000000000000000000000000..a054e07eb3b79a06bf2f6404fca50c20c582b35a
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diff --git a/tests/test_data/std/jdk/internal/classfile/impl/UnboundAttribute$UnboundModuleAttribute.class b/tests/test_data/std/jdk/internal/classfile/impl/UnboundAttribute$UnboundModuleAttribute.class
new file mode 100644
index 0000000000000000000000000000000000000000..9d53bf78ea5e0e574101770afd222165dfa57149
GIT binary patch
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diff --git a/tests/test_data/std/jdk/internal/classfile/impl/UnboundAttribute$UnboundModuleExportInfo.class b/tests/test_data/std/jdk/internal/classfile/impl/UnboundAttribute$UnboundModuleExportInfo.class
new file mode 100644
index 0000000000000000000000000000000000000000..0ba9958f04f66c03e225d913a0a819cef323d0cb
GIT binary patch
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diff --git a/tests/test_data/std/jdk/internal/classfile/impl/UnboundAttribute$UnboundModuleHashInfo.class b/tests/test_data/std/jdk/internal/classfile/impl/UnboundAttribute$UnboundModuleHashInfo.class
new file mode 100644
index 0000000000000000000000000000000000000000..9f85ebe610083cc4ffbf5b2125d38f219b3cf6eb
GIT binary patch
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diff --git a/tests/test_data/std/jdk/internal/classfile/impl/UnboundAttribute$UnboundModuleHashesAttribute.class b/tests/test_data/std/jdk/internal/classfile/impl/UnboundAttribute$UnboundModuleHashesAttribute.class
new file mode 100644
index 0000000000000000000000000000000000000000..65305c099cd93d3a9b9bccbdbe9f5fa31556e60f
GIT binary patch
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diff --git a/tests/test_data/std/jdk/internal/classfile/impl/UnboundAttribute$UnboundModuleMainClassAttribute.class b/tests/test_data/std/jdk/internal/classfile/impl/UnboundAttribute$UnboundModuleMainClassAttribute.class
new file mode 100644
index 0000000000000000000000000000000000000000..9d16cafeafb302adf3e301ff6ce460989b73abba
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diff --git a/tests/test_data/std/jdk/internal/classfile/impl/UnboundAttribute$UnboundModuleOpenInfo.class b/tests/test_data/std/jdk/internal/classfile/impl/UnboundAttribute$UnboundModuleOpenInfo.class
new file mode 100644
index 0000000000000000000000000000000000000000..70f7a3a647bce746ce42b23faff33ebe9d3a64ed
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diff --git a/tests/test_data/std/jdk/internal/classfile/impl/UnboundAttribute$UnboundModulePackagesAttribute.class b/tests/test_data/std/jdk/internal/classfile/impl/UnboundAttribute$UnboundModulePackagesAttribute.class
new file mode 100644
index 0000000000000000000000000000000000000000..27e951c5c5365cd4abec62d767d11c496aa9f6b1
GIT binary patch
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diff --git a/tests/test_data/std/jdk/internal/classfile/impl/UnboundAttribute$UnboundModuleProvideInfo.class b/tests/test_data/std/jdk/internal/classfile/impl/UnboundAttribute$UnboundModuleProvideInfo.class
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diff --git a/tests/test_data/std/jdk/internal/classfile/impl/UnboundAttribute$UnboundModuleRequiresInfo.class b/tests/test_data/std/jdk/internal/classfile/impl/UnboundAttribute$UnboundModuleRequiresInfo.class
new file mode 100644
index 0000000000000000000000000000000000000000..08a5fc7e3c1868f5a477228a733781ac50a6d321
GIT binary patch
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diff --git a/tests/test_data/std/jdk/internal/classfile/impl/UnboundAttribute$UnboundModuleResolutionAttribute.class b/tests/test_data/std/jdk/internal/classfile/impl/UnboundAttribute$UnboundModuleResolutionAttribute.class
new file mode 100644
index 0000000000000000000000000000000000000000..be760d9f596b286b627da8c4c797696275589f66
GIT binary patch
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diff --git a/tests/test_data/std/jdk/internal/classfile/impl/UnboundAttribute$UnboundModuleTargetAttribute.class b/tests/test_data/std/jdk/internal/classfile/impl/UnboundAttribute$UnboundModuleTargetAttribute.class
new file mode 100644
index 0000000000000000000000000000000000000000..ee7208582a8ca665f5ec67ddef454d7df71a3cb5
GIT binary patch
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diff --git a/tests/test_data/std/jdk/internal/classfile/impl/UnboundAttribute$UnboundNestHostAttribute.class b/tests/test_data/std/jdk/internal/classfile/impl/UnboundAttribute$UnboundNestHostAttribute.class
new file mode 100644
index 0000000000000000000000000000000000000000..58ee6478df9ec862452cdef7a43ff7a4cdc20061
GIT binary patch
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diff --git a/tests/test_data/std/jdk/internal/classfile/impl/UnboundAttribute$UnboundNestMembersAttribute.class b/tests/test_data/std/jdk/internal/classfile/impl/UnboundAttribute$UnboundNestMembersAttribute.class
new file mode 100644
index 0000000000000000000000000000000000000000..56c3858575e332ca59105a632673ed3a4b222689
GIT binary patch
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diff --git a/tests/test_data/std/jdk/internal/classfile/impl/UnboundAttribute$UnboundPermittedSubclassesAttribute.class b/tests/test_data/std/jdk/internal/classfile/impl/UnboundAttribute$UnboundPermittedSubclassesAttribute.class
new file mode 100644
index 0000000000000000000000000000000000000000..57d68d71ae7cf141cbd462f53efb266ad493f423
GIT binary patch
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diff --git a/tests/test_data/std/jdk/internal/classfile/impl/UnboundAttribute$UnboundRecordAttribute.class b/tests/test_data/std/jdk/internal/classfile/impl/UnboundAttribute$UnboundRecordAttribute.class
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GIT binary patch
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diff --git a/tests/test_data/std/jdk/internal/classfile/impl/UnboundAttribute$UnboundRecordComponentInfo.class b/tests/test_data/std/jdk/internal/classfile/impl/UnboundAttribute$UnboundRecordComponentInfo.class
new file mode 100644
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diff --git a/tests/test_data/std/jdk/internal/classfile/impl/UnboundAttribute$UnboundRuntimeInvisibleAnnotationsAttribute.class b/tests/test_data/std/jdk/internal/classfile/impl/UnboundAttribute$UnboundRuntimeInvisibleAnnotationsAttribute.class
new file mode 100644
index 0000000000000000000000000000000000000000..c46cb81198abfd00344a8ba864a13963f86fd6fc
GIT binary patch
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literal 0
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diff --git a/tests/test_data/std/jdk/internal/classfile/impl/UnboundAttribute$UnboundRuntimeInvisibleParameterAnnotationsAttribute.class b/tests/test_data/std/jdk/internal/classfile/impl/UnboundAttribute$UnboundRuntimeInvisibleParameterAnnotationsAttribute.class
new file mode 100644
index 0000000000000000000000000000000000000000..3c0e913cfecd158d9f2e82e6be04d5e85295e330
GIT binary patch
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literal 0
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diff --git a/tests/test_data/std/jdk/internal/classfile/impl/UnboundAttribute$UnboundRuntimeInvisibleTypeAnnotationsAttribute.class b/tests/test_data/std/jdk/internal/classfile/impl/UnboundAttribute$UnboundRuntimeInvisibleTypeAnnotationsAttribute.class
new file mode 100644
index 0000000000000000000000000000000000000000..84479496a7515a7844a903944e3758324657cc6a
GIT binary patch
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literal 0
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diff --git a/tests/test_data/std/jdk/internal/classfile/impl/UnboundAttribute$UnboundRuntimeVisibleAnnotationsAttribute.class b/tests/test_data/std/jdk/internal/classfile/impl/UnboundAttribute$UnboundRuntimeVisibleAnnotationsAttribute.class
new file mode 100644
index 0000000000000000000000000000000000000000..86fea55198d55a22ee5d2e343048ed9181c8e433
GIT binary patch
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literal 0
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diff --git a/tests/test_data/std/jdk/internal/classfile/impl/UnboundAttribute$UnboundRuntimeVisibleParameterAnnotationsAttribute.class b/tests/test_data/std/jdk/internal/classfile/impl/UnboundAttribute$UnboundRuntimeVisibleParameterAnnotationsAttribute.class
new file mode 100644
index 0000000000000000000000000000000000000000..3fc521d26af01f9781729b74279c97c9d18b9b66
GIT binary patch
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literal 0
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diff --git a/tests/test_data/std/jdk/internal/classfile/impl/UnboundAttribute$UnboundRuntimeVisibleTypeAnnotationsAttribute.class b/tests/test_data/std/jdk/internal/classfile/impl/UnboundAttribute$UnboundRuntimeVisibleTypeAnnotationsAttribute.class
new file mode 100644
index 0000000000000000000000000000000000000000..c25b66607290f6299c252fa7e1153b5851f294c4
GIT binary patch
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literal 0
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diff --git a/tests/test_data/std/jdk/internal/classfile/impl/UnboundAttribute$UnboundSignatureAttribute.class b/tests/test_data/std/jdk/internal/classfile/impl/UnboundAttribute$UnboundSignatureAttribute.class
new file mode 100644
index 0000000000000000000000000000000000000000..7ac7c2b3de0795a85d3ceb8b18b17dd8277b3923
GIT binary patch
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literal 0
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diff --git a/tests/test_data/std/jdk/internal/classfile/impl/UnboundAttribute$UnboundSourceDebugExtensionAttribute.class b/tests/test_data/std/jdk/internal/classfile/impl/UnboundAttribute$UnboundSourceDebugExtensionAttribute.class
new file mode 100644
index 0000000000000000000000000000000000000000..3d5ad75f6182c264441a78a31677f31fb32d4846
GIT binary patch
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literal 0
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diff --git a/tests/test_data/std/jdk/internal/classfile/impl/UnboundAttribute$UnboundSourceFileAttribute.class b/tests/test_data/std/jdk/internal/classfile/impl/UnboundAttribute$UnboundSourceFileAttribute.class
new file mode 100644
index 0000000000000000000000000000000000000000..c114476709a1a9cddab4e726a512675111c25004
GIT binary patch
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diff --git a/tests/test_data/std/jdk/internal/classfile/impl/UnboundAttribute$UnboundSourceIDAttribute.class b/tests/test_data/std/jdk/internal/classfile/impl/UnboundAttribute$UnboundSourceIDAttribute.class
new file mode 100644
index 0000000000000000000000000000000000000000..909bc5cb2501c5edec346bfbdbded7dee2fe4a89
GIT binary patch
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literal 0
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diff --git a/tests/test_data/std/jdk/internal/classfile/impl/UnboundAttribute$UnboundStackMapTableAttribute.class b/tests/test_data/std/jdk/internal/classfile/impl/UnboundAttribute$UnboundStackMapTableAttribute.class
new file mode 100644
index 0000000000000000000000000000000000000000..4fb1e029b50a20ade29e7166cd252966731d5150
GIT binary patch
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diff --git a/tests/test_data/std/jdk/internal/classfile/impl/UnboundAttribute$UnboundSyntheticAttribute.class b/tests/test_data/std/jdk/internal/classfile/impl/UnboundAttribute$UnboundSyntheticAttribute.class
new file mode 100644
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diff --git a/tests/test_data/std/jdk/internal/classfile/impl/UnboundAttribute$UnboundTypeAnnotation.class b/tests/test_data/std/jdk/internal/classfile/impl/UnboundAttribute$UnboundTypeAnnotation.class
new file mode 100644
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diff --git a/tests/test_data/std/jdk/internal/classfile/impl/UnboundAttribute.class b/tests/test_data/std/jdk/internal/classfile/impl/UnboundAttribute.class
new file mode 100644
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HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/classfile/impl/UnboundAttribute.java b/tests/test_data/std/jdk/internal/classfile/impl/UnboundAttribute.java
new file mode 100644
index 00000000..70b58e42
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/classfile/impl/UnboundAttribute.java
@@ -0,0 +1,937 @@
+/*
+ * Copyright (c) 2022, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package jdk.internal.classfile.impl;
+
+import java.util.Collection;
+import java.util.List;
+import java.util.Optional;
+
+import java.lang.classfile.Annotation;
+import java.lang.classfile.AnnotationElement;
+import java.lang.classfile.AnnotationValue;
+import java.lang.classfile.Attribute;
+import java.lang.classfile.AttributeMapper;
+import java.lang.classfile.Attributes;
+import java.lang.classfile.BootstrapMethodEntry;
+import java.lang.classfile.BufWriter;
+import java.lang.classfile.constantpool.ClassEntry;
+import java.lang.classfile.Label;
+import java.lang.classfile.TypeAnnotation;
+import java.lang.classfile.attribute.AnnotationDefaultAttribute;
+import java.lang.classfile.attribute.BootstrapMethodsAttribute;
+import java.lang.classfile.attribute.CharacterRangeInfo;
+import java.lang.classfile.attribute.CharacterRangeTableAttribute;
+import java.lang.classfile.attribute.CompilationIDAttribute;
+import java.lang.classfile.attribute.ConstantValueAttribute;
+import java.lang.classfile.attribute.DeprecatedAttribute;
+import java.lang.classfile.attribute.EnclosingMethodAttribute;
+import java.lang.classfile.attribute.ExceptionsAttribute;
+import java.lang.classfile.attribute.InnerClassInfo;
+import java.lang.classfile.attribute.InnerClassesAttribute;
+import java.lang.classfile.attribute.LineNumberInfo;
+import java.lang.classfile.attribute.LineNumberTableAttribute;
+import java.lang.classfile.attribute.LocalVariableInfo;
+import java.lang.classfile.attribute.LocalVariableTableAttribute;
+import java.lang.classfile.attribute.LocalVariableTypeInfo;
+import java.lang.classfile.attribute.LocalVariableTypeTableAttribute;
+import java.lang.classfile.attribute.MethodParameterInfo;
+import java.lang.classfile.attribute.MethodParametersAttribute;
+import java.lang.classfile.attribute.ModuleAttribute;
+import java.lang.classfile.attribute.ModuleExportInfo;
+import java.lang.classfile.attribute.ModuleHashInfo;
+import java.lang.classfile.attribute.ModuleHashesAttribute;
+import java.lang.classfile.attribute.ModuleMainClassAttribute;
+import java.lang.classfile.attribute.ModuleOpenInfo;
+import java.lang.classfile.attribute.ModulePackagesAttribute;
+import java.lang.classfile.attribute.ModuleProvideInfo;
+import java.lang.classfile.attribute.ModuleRequireInfo;
+import java.lang.classfile.attribute.ModuleResolutionAttribute;
+import java.lang.classfile.attribute.ModuleTargetAttribute;
+import java.lang.classfile.attribute.NestHostAttribute;
+import java.lang.classfile.attribute.NestMembersAttribute;
+import java.lang.classfile.attribute.PermittedSubclassesAttribute;
+import java.lang.classfile.attribute.RecordAttribute;
+import java.lang.classfile.attribute.RecordComponentInfo;
+import java.lang.classfile.attribute.RuntimeInvisibleAnnotationsAttribute;
+import java.lang.classfile.attribute.RuntimeInvisibleParameterAnnotationsAttribute;
+import java.lang.classfile.attribute.RuntimeInvisibleTypeAnnotationsAttribute;
+import java.lang.classfile.attribute.RuntimeVisibleAnnotationsAttribute;
+import java.lang.classfile.attribute.RuntimeVisibleParameterAnnotationsAttribute;
+import java.lang.classfile.attribute.RuntimeVisibleTypeAnnotationsAttribute;
+import java.lang.classfile.attribute.SignatureAttribute;
+import java.lang.classfile.attribute.SourceDebugExtensionAttribute;
+import java.lang.classfile.attribute.SourceFileAttribute;
+import java.lang.classfile.attribute.SourceIDAttribute;
+import java.lang.classfile.attribute.StackMapTableAttribute;
+import java.lang.classfile.attribute.StackMapFrameInfo;
+import java.lang.classfile.attribute.SyntheticAttribute;
+import java.lang.classfile.constantpool.ConstantValueEntry;
+import java.lang.classfile.constantpool.ModuleEntry;
+import java.lang.classfile.constantpool.NameAndTypeEntry;
+import java.lang.classfile.constantpool.PackageEntry;
+import java.lang.classfile.constantpool.Utf8Entry;
+
+public abstract sealed class UnboundAttribute<T extends Attribute<T>>
+        extends AbstractElement
+        implements Attribute<T> {
+    protected final AttributeMapper<T> mapper;
+
+    public UnboundAttribute(AttributeMapper<T> mapper) {
+        this.mapper = mapper;
+    }
+
+    @Override
+    public AttributeMapper<T> attributeMapper() {
+        return mapper;
+    }
+
+    @Override
+    public String attributeName() {
+        return mapper.name();
+    }
+
+    @Override
+    @SuppressWarnings("unchecked")
+    public void writeTo(BufWriter buf) {
+        mapper.writeAttribute(buf, (T) this);
+    }
+
+    @Override
+    public void writeTo(DirectClassBuilder builder) {
+        builder.writeAttribute(this);
+    }
+
+    @Override
+    public void writeTo(DirectCodeBuilder builder) {
+        builder.writeAttribute(this);
+    }
+
+    @Override
+    public void writeTo(DirectMethodBuilder builder) {
+        builder.writeAttribute(this);
+    }
+
+    @Override
+    public void writeTo(DirectFieldBuilder builder) {
+        builder.writeAttribute(this);
+    }
+
+    @Override
+    public String toString() {
+        return String.format("Attribute[name=%s]", mapper.name());
+    }
+    public static final class UnboundConstantValueAttribute
+            extends UnboundAttribute<ConstantValueAttribute>
+            implements ConstantValueAttribute {
+
+        private final ConstantValueEntry entry;
+
+        public UnboundConstantValueAttribute(ConstantValueEntry entry) {
+            super(Attributes.constantValue());
+            this.entry = entry;
+        }
+
+        @Override
+        public ConstantValueEntry constant() {
+            return entry;
+        }
+
+    }
+
+    public static final class UnboundDeprecatedAttribute
+            extends UnboundAttribute<DeprecatedAttribute>
+            implements DeprecatedAttribute {
+        public UnboundDeprecatedAttribute() {
+            super(Attributes.deprecated());
+        }
+    }
+
+    public static final class UnboundSyntheticAttribute
+            extends UnboundAttribute<SyntheticAttribute>
+            implements SyntheticAttribute {
+        public UnboundSyntheticAttribute() {
+            super(Attributes.synthetic());
+        }
+    }
+
+    public static final class UnboundSignatureAttribute
+            extends UnboundAttribute<SignatureAttribute>
+            implements SignatureAttribute {
+        private final Utf8Entry signature;
+
+        public UnboundSignatureAttribute(Utf8Entry signature) {
+            super(Attributes.signature());
+            this.signature = signature;
+        }
+
+        @Override
+        public Utf8Entry signature() {
+            return signature;
+        }
+    }
+
+    public static final class UnboundExceptionsAttribute
+            extends UnboundAttribute<ExceptionsAttribute>
+            implements ExceptionsAttribute {
+        private final List<ClassEntry> exceptions;
+
+        public UnboundExceptionsAttribute(List<ClassEntry> exceptions) {
+            super(Attributes.exceptions());
+            this.exceptions = List.copyOf(exceptions);
+        }
+
+        @Override
+        public List<ClassEntry> exceptions() {
+            return exceptions;
+        }
+    }
+
+    public static final class UnboundAnnotationDefaultAttribute
+            extends UnboundAttribute<AnnotationDefaultAttribute>
+            implements AnnotationDefaultAttribute {
+        private final AnnotationValue annotationDefault;
+
+        public UnboundAnnotationDefaultAttribute(AnnotationValue annotationDefault) {
+            super(Attributes.annotationDefault());
+            this.annotationDefault = annotationDefault;
+        }
+
+        @Override
+        public AnnotationValue defaultValue() {
+            return annotationDefault;
+        }
+    }
+
+    public static final class UnboundSourceFileAttribute extends UnboundAttribute<SourceFileAttribute>
+            implements SourceFileAttribute {
+        private final Utf8Entry sourceFile;
+
+        public UnboundSourceFileAttribute(Utf8Entry sourceFile) {
+            super(Attributes.sourceFile());
+            this.sourceFile = sourceFile;
+        }
+
+        @Override
+        public Utf8Entry sourceFile() {
+            return sourceFile;
+        }
+
+    }
+
+    public static final class UnboundStackMapTableAttribute extends UnboundAttribute<StackMapTableAttribute>
+            implements StackMapTableAttribute {
+        private final List<StackMapFrameInfo> entries;
+
+        public UnboundStackMapTableAttribute(List<StackMapFrameInfo> entries) {
+            super(Attributes.stackMapTable());
+            this.entries = List.copyOf(entries);
+        }
+
+        @Override
+        public List<StackMapFrameInfo> entries() {
+            return entries;
+        }
+    }
+
+    public static final class UnboundInnerClassesAttribute
+            extends UnboundAttribute<InnerClassesAttribute>
+            implements InnerClassesAttribute {
+        private final List<InnerClassInfo> innerClasses;
+
+        public UnboundInnerClassesAttribute(List<InnerClassInfo> innerClasses) {
+            super(Attributes.innerClasses());
+            this.innerClasses = List.copyOf(innerClasses);
+        }
+
+        @Override
+        public List<InnerClassInfo> classes() {
+            return innerClasses;
+        }
+    }
+
+    public static final class UnboundRecordAttribute
+            extends UnboundAttribute<RecordAttribute>
+            implements RecordAttribute {
+        private final List<RecordComponentInfo> components;
+
+        public UnboundRecordAttribute(List<RecordComponentInfo> components) {
+            super(Attributes.record());
+            this.components = List.copyOf(components);
+        }
+
+        @Override
+        public List<RecordComponentInfo> components() {
+            return components;
+        }
+    }
+
+    public static final class UnboundEnclosingMethodAttribute
+            extends UnboundAttribute<EnclosingMethodAttribute>
+            implements EnclosingMethodAttribute {
+        private final ClassEntry classEntry;
+        private final NameAndTypeEntry method;
+
+        public UnboundEnclosingMethodAttribute(ClassEntry classEntry, NameAndTypeEntry method) {
+            super(Attributes.enclosingMethod());
+            this.classEntry = classEntry;
+            this.method = method;
+        }
+
+        @Override
+        public ClassEntry enclosingClass() {
+            return classEntry;
+        }
+
+        @Override
+        public Optional<NameAndTypeEntry> enclosingMethod() {
+            return Optional.ofNullable(method);
+        }
+    }
+
+    public static final class UnboundMethodParametersAttribute
+            extends UnboundAttribute<MethodParametersAttribute>
+            implements MethodParametersAttribute {
+        private final List<MethodParameterInfo> parameters;
+
+        public UnboundMethodParametersAttribute(List<MethodParameterInfo> parameters) {
+            super(Attributes.methodParameters());
+            this.parameters = List.copyOf(parameters);
+        }
+
+        @Override
+        public List<MethodParameterInfo> parameters() {
+            return parameters;
+        }
+    }
+
+    public static final class UnboundModuleTargetAttribute
+            extends UnboundAttribute<ModuleTargetAttribute>
+            implements ModuleTargetAttribute {
+        final Utf8Entry moduleTarget;
+
+        public UnboundModuleTargetAttribute(Utf8Entry moduleTarget) {
+            super(Attributes.moduleTarget());
+            this.moduleTarget = moduleTarget;
+        }
+
+        @Override
+        public Utf8Entry targetPlatform() {
+            return moduleTarget;
+        }
+    }
+
+    public static final class UnboundModuleMainClassAttribute
+            extends UnboundAttribute<ModuleMainClassAttribute>
+            implements ModuleMainClassAttribute {
+        final ClassEntry mainClass;
+
+        public UnboundModuleMainClassAttribute(ClassEntry mainClass) {
+            super(Attributes.moduleMainClass());
+            this.mainClass = mainClass;
+        }
+
+        @Override
+        public ClassEntry mainClass() {
+            return mainClass;
+        }
+    }
+
+    public static final class UnboundModuleHashesAttribute
+            extends UnboundAttribute<ModuleHashesAttribute>
+            implements ModuleHashesAttribute {
+        private final Utf8Entry algorithm;
+        private final List<ModuleHashInfo> hashes;
+
+        public UnboundModuleHashesAttribute(Utf8Entry algorithm, List<ModuleHashInfo> hashes) {
+            super(Attributes.moduleHashes());
+            this.algorithm = algorithm;
+            this.hashes = List.copyOf(hashes);
+        }
+
+        @Override
+        public Utf8Entry algorithm() {
+            return algorithm;
+        }
+
+        @Override
+        public List<ModuleHashInfo> hashes() {
+            return hashes;
+        }
+    }
+
+    public static final class UnboundModulePackagesAttribute
+            extends UnboundAttribute<ModulePackagesAttribute>
+            implements ModulePackagesAttribute {
+        private final Collection<PackageEntry> packages;
+
+        public UnboundModulePackagesAttribute(Collection<PackageEntry> packages) {
+            super(Attributes.modulePackages());
+            this.packages = List.copyOf(packages);
+        }
+
+        @Override
+        public List<PackageEntry> packages() {
+            return List.copyOf(packages);
+        }
+    }
+
+    public static final class UnboundModuleResolutionAttribute
+            extends UnboundAttribute<ModuleResolutionAttribute>
+            implements ModuleResolutionAttribute {
+        private final int resolutionFlags;
+
+        public UnboundModuleResolutionAttribute(int flags) {
+            super(Attributes.moduleResolution());
+            resolutionFlags = flags;
+        }
+
+        @Override
+        public int resolutionFlags() {
+            return resolutionFlags;
+        }
+    }
+
+    public static final class UnboundPermittedSubclassesAttribute
+            extends UnboundAttribute<PermittedSubclassesAttribute>
+            implements PermittedSubclassesAttribute {
+        private final List<ClassEntry> permittedSubclasses;
+
+        public UnboundPermittedSubclassesAttribute(List<ClassEntry> permittedSubclasses) {
+            super(Attributes.permittedSubclasses());
+            this.permittedSubclasses = List.copyOf(permittedSubclasses);
+        }
+
+        @Override
+        public List<ClassEntry> permittedSubclasses() {
+            return permittedSubclasses;
+        }
+    }
+
+    public static final class UnboundNestMembersAttribute
+            extends UnboundAttribute<NestMembersAttribute>
+            implements NestMembersAttribute {
+        private final List<ClassEntry> memberEntries;
+
+        public UnboundNestMembersAttribute(List<ClassEntry> memberEntries) {
+            super(Attributes.nestMembers());
+            this.memberEntries = List.copyOf(memberEntries);
+        }
+
+        @Override
+        public List<ClassEntry> nestMembers() {
+            return memberEntries;
+        }
+    }
+
+    public static final class UnboundNestHostAttribute
+            extends UnboundAttribute<NestHostAttribute>
+            implements NestHostAttribute {
+        private final ClassEntry hostEntry;
+
+        public UnboundNestHostAttribute(ClassEntry hostEntry) {
+            super(Attributes.nestHost());
+            this.hostEntry = hostEntry;
+        }
+
+        @Override
+        public ClassEntry nestHost() {
+            return hostEntry;
+        }
+    }
+
+    public static final class UnboundCompilationIDAttribute
+            extends UnboundAttribute<CompilationIDAttribute>
+            implements CompilationIDAttribute {
+        private final Utf8Entry idEntry;
+
+        public UnboundCompilationIDAttribute(Utf8Entry idEntry) {
+            super(Attributes.compilationId());
+            this.idEntry = idEntry;
+        }
+
+        @Override
+        public Utf8Entry compilationId() {
+            return idEntry;
+        }
+    }
+
+    public static final class UnboundSourceIDAttribute
+            extends UnboundAttribute<SourceIDAttribute>
+            implements SourceIDAttribute {
+        private final Utf8Entry idEntry;
+
+        public UnboundSourceIDAttribute(Utf8Entry idEntry) {
+            super(Attributes.sourceId());
+            this.idEntry = idEntry;
+        }
+
+        @Override
+        public Utf8Entry sourceId() {
+            return idEntry;
+        }
+    }
+
+    public static final class UnboundSourceDebugExtensionAttribute
+        extends UnboundAttribute<SourceDebugExtensionAttribute>
+            implements SourceDebugExtensionAttribute {
+        private final byte[] contents;
+
+        public UnboundSourceDebugExtensionAttribute(byte[] contents) {
+            super(Attributes.sourceDebugExtension());
+            this.contents = contents;
+        }
+
+        @Override
+        public byte[] contents() {
+            return contents;
+        }
+    }
+
+    public static final class UnboundCharacterRangeTableAttribute
+        extends UnboundAttribute<CharacterRangeTableAttribute>
+            implements CharacterRangeTableAttribute {
+        private final List<CharacterRangeInfo> ranges;
+
+        public UnboundCharacterRangeTableAttribute(List<CharacterRangeInfo> ranges) {
+            super(Attributes.characterRangeTable());
+            this.ranges = List.copyOf(ranges);
+        }
+
+        @Override
+        public List<CharacterRangeInfo> characterRangeTable() {
+            return ranges;
+        }
+    }
+
+    public static final class UnboundLineNumberTableAttribute
+        extends UnboundAttribute<LineNumberTableAttribute>
+            implements LineNumberTableAttribute {
+        private final List<LineNumberInfo> lines;
+
+        public UnboundLineNumberTableAttribute(List<LineNumberInfo> lines) {
+            super(Attributes.lineNumberTable());
+            this.lines = List.copyOf(lines);
+        }
+
+        @Override
+        public List<LineNumberInfo> lineNumbers() {
+            return lines;
+        }
+    }
+
+    public static final class UnboundLocalVariableTableAttribute
+        extends UnboundAttribute<LocalVariableTableAttribute>
+            implements LocalVariableTableAttribute {
+        private final List<LocalVariableInfo> locals;
+
+        public UnboundLocalVariableTableAttribute(List<LocalVariableInfo> locals) {
+            super(Attributes.localVariableTable());
+            this.locals = List.copyOf(locals);
+        }
+
+        @Override
+        public List<LocalVariableInfo> localVariables() {
+            return locals;
+        }
+    }
+
+    public static final class UnboundLocalVariableTypeTableAttribute
+        extends UnboundAttribute<LocalVariableTypeTableAttribute>
+            implements LocalVariableTypeTableAttribute {
+        private final List<LocalVariableTypeInfo> locals;
+
+        public UnboundLocalVariableTypeTableAttribute(List<LocalVariableTypeInfo> locals) {
+            super(Attributes.localVariableTypeTable());
+            this.locals = List.copyOf(locals);
+        }
+
+        @Override
+        public List<LocalVariableTypeInfo> localVariableTypes() {
+            return locals;
+        }
+    }
+
+    public static final class UnboundRuntimeVisibleAnnotationsAttribute
+            extends UnboundAttribute<RuntimeVisibleAnnotationsAttribute>
+            implements RuntimeVisibleAnnotationsAttribute {
+        private final List<Annotation> elements;
+
+        public UnboundRuntimeVisibleAnnotationsAttribute(List<Annotation> elements) {
+            super(Attributes.runtimeVisibleAnnotations());
+            this.elements = List.copyOf(elements);
+        }
+
+        @Override
+        public List<Annotation> annotations() {
+            return elements;
+        }
+    }
+
+    public static final class UnboundRuntimeInvisibleAnnotationsAttribute
+            extends UnboundAttribute<RuntimeInvisibleAnnotationsAttribute>
+            implements RuntimeInvisibleAnnotationsAttribute {
+        private final List<Annotation> elements;
+
+        public UnboundRuntimeInvisibleAnnotationsAttribute(List<Annotation> elements) {
+            super(Attributes.runtimeInvisibleAnnotations());
+            this.elements = List.copyOf(elements);
+        }
+
+        @Override
+        public List<Annotation> annotations() {
+            return elements;
+        }
+    }
+
+    public static final class UnboundRuntimeVisibleParameterAnnotationsAttribute
+            extends UnboundAttribute<RuntimeVisibleParameterAnnotationsAttribute>
+            implements RuntimeVisibleParameterAnnotationsAttribute {
+        private final List<List<Annotation>> elements;
+
+        public UnboundRuntimeVisibleParameterAnnotationsAttribute(List<List<Annotation>> elements) {
+            super(Attributes.runtimeVisibleParameterAnnotations());
+            this.elements = List.copyOf(elements);
+        }
+
+        @Override
+        public List<List<Annotation>> parameterAnnotations() {
+            return elements;
+        }
+    }
+
+    public static final class UnboundRuntimeInvisibleParameterAnnotationsAttribute
+            extends UnboundAttribute<RuntimeInvisibleParameterAnnotationsAttribute>
+            implements RuntimeInvisibleParameterAnnotationsAttribute {
+        private final List<List<Annotation>> elements;
+
+        public UnboundRuntimeInvisibleParameterAnnotationsAttribute(List<List<Annotation>> elements) {
+            super(Attributes.runtimeInvisibleParameterAnnotations());
+            this.elements = List.copyOf(elements);
+        }
+
+        @Override
+        public List<List<Annotation>> parameterAnnotations() {
+            return elements;
+        }
+    }
+
+    public static final class UnboundRuntimeVisibleTypeAnnotationsAttribute
+            extends UnboundAttribute<RuntimeVisibleTypeAnnotationsAttribute>
+            implements RuntimeVisibleTypeAnnotationsAttribute {
+        private final List<TypeAnnotation> elements;
+
+        public UnboundRuntimeVisibleTypeAnnotationsAttribute(List<TypeAnnotation> elements) {
+            super(Attributes.runtimeVisibleTypeAnnotations());
+            this.elements = List.copyOf(elements);
+        }
+
+        @Override
+        public List<TypeAnnotation> annotations() {
+            return elements;
+        }
+    }
+
+    public static final class UnboundRuntimeInvisibleTypeAnnotationsAttribute
+            extends UnboundAttribute<RuntimeInvisibleTypeAnnotationsAttribute>
+            implements RuntimeInvisibleTypeAnnotationsAttribute {
+        private final List<TypeAnnotation> elements;
+
+        public UnboundRuntimeInvisibleTypeAnnotationsAttribute(List<TypeAnnotation> elements) {
+            super(Attributes.runtimeInvisibleTypeAnnotations());
+            this.elements = List.copyOf(elements);
+        }
+
+        @Override
+        public List<TypeAnnotation> annotations() {
+            return elements;
+        }
+    }
+
+    public record UnboundCharacterRangeInfo(int startPc, int endPc,
+                                            int characterRangeStart,
+                                            int characterRangeEnd,
+                                            int flags)
+            implements CharacterRangeInfo { }
+
+    public record UnboundInnerClassInfo(ClassEntry innerClass,
+                                        Optional<ClassEntry> outerClass,
+                                        Optional<Utf8Entry> innerName,
+                                        int flagsMask)
+            implements InnerClassInfo {}
+
+    public record UnboundLineNumberInfo(int startPc, int lineNumber)
+            implements LineNumberInfo { }
+
+    public record UnboundLocalVariableInfo(int startPc, int length,
+                                           Utf8Entry name,
+                                           Utf8Entry type,
+                                           int slot)
+            implements LocalVariableInfo { }
+
+    public record UnboundLocalVariableTypeInfo(int startPc, int length,
+                                               Utf8Entry name,
+                                               Utf8Entry signature,
+                                               int slot)
+            implements LocalVariableTypeInfo { }
+
+    public record UnboundMethodParameterInfo(Optional<Utf8Entry> name, int flagsMask)
+            implements MethodParameterInfo {}
+
+    public record UnboundModuleExportInfo(PackageEntry exportedPackage,
+                                          int exportsFlagsMask,
+                                          List<ModuleEntry> exportsTo)
+            implements ModuleExportInfo {
+        public UnboundModuleExportInfo(PackageEntry exportedPackage, int exportsFlagsMask,
+                                       List<ModuleEntry> exportsTo) {
+            this.exportedPackage = exportedPackage;
+            this.exportsFlagsMask = exportsFlagsMask;
+            this.exportsTo = List.copyOf(exportsTo);
+        }
+    }
+
+    public record UnboundModuleHashInfo(ModuleEntry moduleName,
+                                        byte[] hash) implements ModuleHashInfo { }
+
+    public record UnboundModuleOpenInfo(PackageEntry openedPackage, int opensFlagsMask,
+                                        List<ModuleEntry> opensTo)
+            implements ModuleOpenInfo {
+        public UnboundModuleOpenInfo(PackageEntry openedPackage, int opensFlagsMask,
+                                     List<ModuleEntry> opensTo) {
+            this.openedPackage = openedPackage;
+            this.opensFlagsMask = opensFlagsMask;
+            this.opensTo = List.copyOf(opensTo);
+        }
+    }
+
+    public record UnboundModuleProvideInfo(ClassEntry provides,
+                                           List<ClassEntry> providesWith)
+            implements ModuleProvideInfo {
+        public UnboundModuleProvideInfo(ClassEntry provides, List<ClassEntry> providesWith) {
+            this.provides = provides;
+            this.providesWith = List.copyOf(providesWith);
+        }
+    }
+
+    public record UnboundModuleRequiresInfo(ModuleEntry requires, int requiresFlagsMask,
+                                            Optional<Utf8Entry> requiresVersion)
+            implements ModuleRequireInfo {}
+
+    public record UnboundRecordComponentInfo(Utf8Entry name,
+                                             Utf8Entry descriptor,
+                                             List<Attribute<?>> attributes)
+            implements RecordComponentInfo {
+        public UnboundRecordComponentInfo(Utf8Entry name, Utf8Entry descriptor, List<Attribute<?>> attributes) {
+            this.name = name;
+            this.descriptor = descriptor;
+            this.attributes = List.copyOf(attributes);
+        }
+    }
+
+    public record UnboundTypeAnnotation(TargetInfo targetInfo,
+                                        List<TypePathComponent> targetPath,
+                                        Utf8Entry className,
+                                        List<AnnotationElement> elements) implements TypeAnnotation {
+
+        public UnboundTypeAnnotation(TargetInfo targetInfo, List<TypePathComponent> targetPath,
+                                     Utf8Entry className, List<AnnotationElement> elements) {
+            this.targetInfo = targetInfo;
+            this.targetPath = List.copyOf(targetPath);
+            this.className = className;
+            this.elements = List.copyOf(elements);
+        }
+
+        private int labelToBci(LabelContext lr, Label label) {
+            //helper method to avoid NPE
+            if (lr == null) throw new IllegalArgumentException("Illegal targetType '%s' in TypeAnnotation outside of Code attribute".formatted(targetInfo.targetType()));
+            return lr.labelToBci(label);
+        }
+
+        @Override
+        public void writeTo(BufWriter buf) {
+            LabelContext lr = ((BufWriterImpl) buf).labelContext();
+            // target_type
+            buf.writeU1(targetInfo.targetType().targetTypeValue());
+
+            // target_info
+            switch (targetInfo) {
+                case TypeParameterTarget tpt -> buf.writeU1(tpt.typeParameterIndex());
+                case SupertypeTarget st -> buf.writeU2(st.supertypeIndex());
+                case TypeParameterBoundTarget tpbt -> {
+                    buf.writeU1(tpbt.typeParameterIndex());
+                    buf.writeU1(tpbt.boundIndex());
+                }
+                case EmptyTarget et -> {
+                    // nothing to write
+                }
+                case FormalParameterTarget fpt -> buf.writeU1(fpt.formalParameterIndex());
+                case ThrowsTarget tt -> buf.writeU2(tt.throwsTargetIndex());
+                case LocalVarTarget lvt -> {
+                    buf.writeU2(lvt.table().size());
+                    for (var e : lvt.table()) {
+                        int startPc = labelToBci(lr, e.startLabel());
+                        buf.writeU2(startPc);
+                        buf.writeU2(labelToBci(lr, e.endLabel()) - startPc);
+                        buf.writeU2(e.index());
+                    }
+                }
+                case CatchTarget ct -> buf.writeU2(ct.exceptionTableIndex());
+                case OffsetTarget ot -> buf.writeU2(labelToBci(lr, ot.target()));
+                case TypeArgumentTarget tat -> {
+                    buf.writeU2(labelToBci(lr, tat.target()));
+                    buf.writeU1(tat.typeArgumentIndex());
+                }
+            }
+
+            // target_path
+            buf.writeU1(targetPath().size());
+            for (TypePathComponent component : targetPath()) {
+                buf.writeU1(component.typePathKind().tag());
+                buf.writeU1(component.typeArgumentIndex());
+            }
+
+            // type_index
+            buf.writeIndex(className);
+
+            // element_value_pairs
+            buf.writeU2(elements.size());
+            for (AnnotationElement pair : elements()) {
+                buf.writeIndex(pair.name());
+                pair.value().writeTo(buf);
+            }
+        }
+    }
+
+    public record TypePathComponentImpl(TypeAnnotation.TypePathComponent.Kind typePathKind, int typeArgumentIndex)
+            implements TypeAnnotation.TypePathComponent {}
+
+    public static final class UnboundModuleAttribute extends UnboundAttribute<ModuleAttribute> implements ModuleAttribute {
+        private final ModuleEntry moduleName;
+        private final int moduleFlags;
+        private final Utf8Entry moduleVersion;
+        private final List<ModuleRequireInfo> requires;
+        private final List<ModuleExportInfo> exports;
+        private final List<ModuleOpenInfo> opens;
+        private final List<ClassEntry> uses;
+        private final List<ModuleProvideInfo> provides;
+
+        public UnboundModuleAttribute(ModuleEntry moduleName,
+                                      int moduleFlags,
+                                      Utf8Entry moduleVersion,
+                                      Collection<ModuleRequireInfo> requires,
+                                      Collection<ModuleExportInfo> exports,
+                                      Collection<ModuleOpenInfo> opens,
+                                      Collection<ClassEntry> uses,
+                                      Collection<ModuleProvideInfo> provides)
+        {
+            super(Attributes.module());
+            this.moduleName = moduleName;
+            this.moduleFlags = moduleFlags;
+            this.moduleVersion = moduleVersion;
+            this.requires = List.copyOf(requires);
+            this.exports = List.copyOf(exports);
+            this.opens = List.copyOf(opens);
+            this.uses = List.copyOf(uses);
+            this.provides = List.copyOf(provides);
+        }
+
+        @Override
+        public ModuleEntry moduleName() {
+            return moduleName;
+        }
+
+        @Override
+        public int moduleFlagsMask() {
+            return moduleFlags;
+        }
+
+        @Override
+        public Optional<Utf8Entry> moduleVersion() {
+            return Optional.ofNullable(moduleVersion);
+        }
+
+        @Override
+        public List<ModuleRequireInfo> requires() {
+            return requires;
+        }
+
+        @Override
+        public List<ModuleExportInfo> exports() {
+            return exports;
+        }
+
+        @Override
+        public List<ModuleOpenInfo> opens() {
+            return opens;
+        }
+
+        @Override
+        public List<ClassEntry> uses() {
+            return uses;
+        }
+
+        @Override
+        public List<ModuleProvideInfo> provides() {
+            return provides;
+        }
+    }
+
+    public abstract static non-sealed class AdHocAttribute<T extends Attribute<T>>
+            extends UnboundAttribute<T> {
+
+        public AdHocAttribute(AttributeMapper<T> mapper) {
+            super(mapper);
+        }
+
+        public abstract void writeBody(BufWriter b);
+
+        @Override
+        public void writeTo(BufWriter b) {
+            b.writeIndex(b.constantPool().utf8Entry(mapper.name()));
+            b.writeInt(0);
+            int start = b.size();
+            writeBody(b);
+            int written = b.size() - start;
+            b.patchInt(start - 4, 4, written);
+        }
+    }
+
+    public static final class EmptyBootstrapAttribute
+            extends UnboundAttribute<BootstrapMethodsAttribute>
+            implements BootstrapMethodsAttribute {
+        public EmptyBootstrapAttribute() {
+            super(Attributes.bootstrapMethods());
+        }
+
+        @Override
+        public int bootstrapMethodsSize() {
+            return 0;
+        }
+
+        @Override
+        public List<BootstrapMethodEntry> bootstrapMethods() {
+            return List.of();
+        }
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/classfile/impl/Util$1.class b/tests/test_data/std/jdk/internal/classfile/impl/Util$1.class
new file mode 100644
index 0000000000000000000000000000000000000000..e6f155effc39f191844e0a138d14fb09beef686b
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diff --git a/tests/test_data/std/jdk/internal/classfile/impl/Util$2.class b/tests/test_data/std/jdk/internal/classfile/impl/Util$2.class
new file mode 100644
index 0000000000000000000000000000000000000000..d297c9759a4c20b45e97e77b7b6d9a16a8b7c0ec
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HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/classfile/impl/Util.java b/tests/test_data/std/jdk/internal/classfile/impl/Util.java
new file mode 100644
index 00000000..0e969272
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/classfile/impl/Util.java
@@ -0,0 +1,240 @@
+/*
+ * Copyright (c) 2022, 2024, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package jdk.internal.classfile.impl;
+
+import java.lang.constant.ClassDesc;
+import java.lang.constant.MethodTypeDesc;
+import java.util.AbstractList;
+import java.util.Collection;
+import java.util.List;
+import java.util.function.Function;
+
+import java.lang.classfile.Attribute;
+import java.lang.classfile.AttributeMapper;
+import java.lang.classfile.Attributes;
+import java.lang.classfile.BufWriter;
+import java.lang.classfile.ClassFile;
+import java.lang.classfile.Opcode;
+import java.lang.classfile.constantpool.ClassEntry;
+import java.lang.classfile.constantpool.ModuleEntry;
+import java.lang.classfile.constantpool.NameAndTypeEntry;
+import java.lang.constant.ModuleDesc;
+import java.lang.reflect.AccessFlag;
+import jdk.internal.access.SharedSecrets;
+
+import static java.lang.classfile.ClassFile.ACC_STATIC;
+import java.lang.classfile.attribute.CodeAttribute;
+import java.lang.classfile.components.ClassPrinter;
+import java.lang.classfile.constantpool.ConstantPoolBuilder;
+import java.nio.ByteBuffer;
+import java.util.function.Consumer;
+
+/**
+ * Helper to create and manipulate type descriptors, where type descriptors are
+ * represented as JVM type descriptor strings and symbols are represented as
+ * name strings
+ */
+public class Util {
+
+    private Util() {
+    }
+
+    private static final int ATTRIBUTE_STABILITY_COUNT = AttributeMapper.AttributeStability.values().length;
+
+    public static boolean isAttributeAllowed(final Attribute<?> attr,
+                                             final ClassFile.AttributesProcessingOption processingOption) {
+        return attr instanceof BoundAttribute
+                ? ATTRIBUTE_STABILITY_COUNT - attr.attributeMapper().stability().ordinal() > processingOption.ordinal()
+                : true;
+    }
+
+    public static int parameterSlots(MethodTypeDesc mDesc) {
+        int count = 0;
+        for (int i = 0; i < mDesc.parameterCount(); i++) {
+            count += slotSize(mDesc.parameterType(i));
+        }
+        return count;
+    }
+
+    public static int[] parseParameterSlots(int flags, MethodTypeDesc mDesc) {
+        int[] result = new int[mDesc.parameterCount()];
+        int count = ((flags & ACC_STATIC) != 0) ? 0 : 1;
+        for (int i = 0; i < result.length; i++) {
+            result[i] = count;
+            count += slotSize(mDesc.parameterType(i));
+        }
+        return result;
+    }
+
+    public static int maxLocals(int flags, MethodTypeDesc mDesc) {
+        int count = ((flags & ACC_STATIC) != 0) ? 0 : 1;
+        for (int i = 0; i < mDesc.parameterCount(); i++) {
+            count += slotSize(mDesc.parameterType(i));
+        }
+        return count;
+    }
+
+    /**
+     * Converts a descriptor of classes or interfaces into
+     * a binary name. Rejects primitive types or arrays.
+     * This is an inverse of {@link ClassDesc#of(String)}.
+     */
+    public static String toBinaryName(ClassDesc cd) {
+        return toInternalName(cd).replace('/', '.');
+    }
+
+    public static String toInternalName(ClassDesc cd) {
+        var desc = cd.descriptorString();
+        if (desc.charAt(0) == 'L')
+            return desc.substring(1, desc.length() - 1);
+        throw new IllegalArgumentException(desc);
+    }
+
+    public static ClassDesc toClassDesc(String classInternalNameOrArrayDesc) {
+        return classInternalNameOrArrayDesc.charAt(0) == '['
+                ? ClassDesc.ofDescriptor(classInternalNameOrArrayDesc)
+                : ClassDesc.ofInternalName(classInternalNameOrArrayDesc);
+    }
+
+    public static<T, U> List<U> mappedList(List<? extends T> list, Function<T, U> mapper) {
+        return new AbstractList<>() {
+            @Override
+            public U get(int index) {
+                return mapper.apply(list.get(index));
+            }
+
+            @Override
+            public int size() {
+                return list.size();
+            }
+        };
+    }
+
+    public static List<ClassEntry> entryList(List<? extends ClassDesc> list) {
+        var result = new Object[list.size()]; // null check
+        for (int i = 0; i < result.length; i++) {
+            result[i] = TemporaryConstantPool.INSTANCE.classEntry(list.get(i));
+        }
+        return SharedSecrets.getJavaUtilCollectionAccess().listFromTrustedArray(result);
+    }
+
+    public static List<ModuleEntry> moduleEntryList(List<? extends ModuleDesc> list) {
+        var result = new Object[list.size()]; // null check
+        for (int i = 0; i < result.length; i++) {
+            result[i] = TemporaryConstantPool.INSTANCE.moduleEntry(TemporaryConstantPool.INSTANCE.utf8Entry(list.get(i).name()));
+        }
+        return SharedSecrets.getJavaUtilCollectionAccess().listFromTrustedArray(result);
+    }
+
+    public static void checkKind(Opcode op, Opcode.Kind k) {
+        if (op.kind() != k)
+            throw new IllegalArgumentException(
+                    String.format("Wrong opcode kind specified; found %s(%s), expected %s", op, op.kind(), k));
+    }
+
+    public static int flagsToBits(AccessFlag.Location location, Collection<AccessFlag> flags) {
+        int i = 0;
+        for (AccessFlag f : flags) {
+            if (!f.locations().contains(location)) {
+                throw new IllegalArgumentException("unexpected flag: " + f + " use in target location: " + location);
+            }
+            i |= f.mask();
+        }
+        return i;
+    }
+
+    public static int flagsToBits(AccessFlag.Location location, AccessFlag... flags) {
+        int i = 0;
+        for (AccessFlag f : flags) {
+            if (!f.locations().contains(location)) {
+                throw new IllegalArgumentException("unexpected flag: " + f + " use in target location: " + location);
+            }
+            i |= f.mask();
+        }
+        return i;
+    }
+
+    public static boolean has(AccessFlag.Location location, int flagsMask, AccessFlag flag) {
+        return (flag.mask() & flagsMask) == flag.mask() && flag.locations().contains(location);
+    }
+
+    public static ClassDesc fieldTypeSymbol(NameAndTypeEntry nat) {
+        return ((AbstractPoolEntry.NameAndTypeEntryImpl)nat).fieldTypeSymbol();
+    }
+
+    public static MethodTypeDesc methodTypeSymbol(NameAndTypeEntry nat) {
+        return ((AbstractPoolEntry.NameAndTypeEntryImpl)nat).methodTypeSymbol();
+    }
+
+    public static int slotSize(ClassDesc desc) {
+        return switch (desc.descriptorString().charAt(0)) {
+            case 'V' -> 0;
+            case 'D','J' -> 2;
+            default -> 1;
+        };
+    }
+
+    public static boolean isDoubleSlot(ClassDesc desc) {
+        char ch = desc.descriptorString().charAt(0);
+        return ch == 'D' || ch == 'J';
+    }
+
+    public static void dumpMethod(SplitConstantPool cp,
+                                  ClassDesc cls,
+                                  String methodName,
+                                  MethodTypeDesc methodDesc,
+                                  int acc,
+                                  ByteBuffer bytecode,
+                                  Consumer<String> dump) {
+
+        // try to dump debug info about corrupted bytecode
+        try {
+            var cc = ClassFile.of();
+            var clm = cc.parse(cc.build(cp.classEntry(cls), cp, clb ->
+                    clb.withMethod(methodName, methodDesc, acc, mb ->
+                            ((DirectMethodBuilder)mb).writeAttribute(new UnboundAttribute.AdHocAttribute<CodeAttribute>(Attributes.code()) {
+                                @Override
+                                public void writeBody(BufWriter b) {
+                                    b.writeU2(-1);//max stack
+                                    b.writeU2(-1);//max locals
+                                    b.writeInt(bytecode.limit());
+                                    b.writeBytes(bytecode.array(), 0, bytecode.limit());
+                                    b.writeU2(0);//exception handlers
+                                    b.writeU2(0);//attributes
+                                }
+                    }))));
+            ClassPrinter.toYaml(clm.methods().get(0).code().get(), ClassPrinter.Verbosity.TRACE_ALL, dump);
+        } catch (Error | Exception _) {
+            // fallback to bytecode hex dump
+            bytecode.rewind();
+            while (bytecode.position() < bytecode.limit()) {
+                dump.accept("%n%04x:".formatted(bytecode.position()));
+                for (int i = 0; i < 16 && bytecode.position() < bytecode.limit(); i++) {
+                    dump.accept(" %02x".formatted(bytecode.get()));
+                }
+            }
+        }
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/classfile/impl/verifier/ParserVerifier$1.class b/tests/test_data/std/jdk/internal/classfile/impl/verifier/ParserVerifier$1.class
new file mode 100644
index 0000000000000000000000000000000000000000..d6d35c5fd69f4c995e5c7cc5d8a5f8b445dc4858
GIT binary patch
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literal 0
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diff --git a/tests/test_data/std/jdk/internal/classfile/impl/verifier/ParserVerifier$1F.class b/tests/test_data/std/jdk/internal/classfile/impl/verifier/ParserVerifier$1F.class
new file mode 100644
index 0000000000000000000000000000000000000000..10fe5dd8d3ad359f2e4b5d58b1936a434d14473d
GIT binary patch
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diff --git a/tests/test_data/std/jdk/internal/classfile/impl/verifier/ParserVerifier$1M.class b/tests/test_data/std/jdk/internal/classfile/impl/verifier/ParserVerifier$1M.class
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diff --git a/tests/test_data/std/jdk/internal/classfile/impl/verifier/ParserVerifier.class b/tests/test_data/std/jdk/internal/classfile/impl/verifier/ParserVerifier.class
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HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/classfile/impl/verifier/ParserVerifier.java b/tests/test_data/std/jdk/internal/classfile/impl/verifier/ParserVerifier.java
new file mode 100644
index 00000000..4a2ffd3f
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/classfile/impl/verifier/ParserVerifier.java
@@ -0,0 +1,494 @@
+/*
+ * Copyright (c) 2023, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package jdk.internal.classfile.impl.verifier;
+
+import java.lang.classfile.Annotation;
+import java.lang.classfile.AnnotationValue;
+import java.lang.constant.ClassDesc;
+import static java.lang.constant.ConstantDescs.CLASS_INIT_NAME;
+import static java.lang.constant.ConstantDescs.INIT_NAME;
+import java.util.ArrayList;
+import java.util.HashSet;
+import java.util.List;
+import java.util.function.Consumer;
+import java.util.stream.Collectors;
+import java.lang.classfile.Attribute;
+import java.lang.classfile.AttributedElement;
+import java.lang.classfile.Attributes;
+import java.lang.classfile.ClassModel;
+import java.lang.classfile.ClassFileElement;
+import java.lang.classfile.CodeModel;
+import java.lang.classfile.CompoundElement;
+import java.lang.classfile.CustomAttribute;
+import java.lang.classfile.FieldModel;
+import java.lang.classfile.MethodModel;
+import java.lang.classfile.TypeAnnotation;
+import java.lang.classfile.TypeKind;
+import java.lang.classfile.attribute.*;
+import java.lang.classfile.constantpool.*;
+import java.lang.constant.ConstantDescs;
+import java.lang.reflect.AccessFlag;
+import java.util.Collection;
+import java.util.function.Function;
+import java.util.function.ToIntFunction;
+import jdk.internal.classfile.impl.BoundAttribute;
+import jdk.internal.classfile.impl.Util;
+
+/**
+ * ParserVerifier performs selected checks of the class file format according to
+ * {@jvms 4.8 Format Checking}
+ *
+ * @see <a href="https://raw.githubusercontent.com/openjdk/jdk/master/src/hotspot/share/classfile/classFileParser.cpp">hotspot/share/classfile/classFileParser.cpp</a>
+ */
+public record ParserVerifier(ClassModel classModel) {
+
+    List<VerifyError> verify() {
+        var errors = new ArrayList<VerifyError>();
+        verifyConstantPool(errors);
+        verifyInterfaces(errors);
+        verifyFields(errors);
+        verifyMethods(errors);
+        verifyAttributes(classModel, errors);
+        return errors;
+    }
+
+    private void verifyConstantPool(List<VerifyError> errors) {
+        for (var cpe : classModel.constantPool()) {
+            Consumer<Runnable> check = c -> {
+                try {
+                    c.run();
+                } catch (VerifyError|Exception e) {
+                    errors.add(new VerifyError("%s at constant pool index %d in %s".formatted(e.getMessage(), cpe.index(), toString(classModel))));
+                }
+            };
+            check.accept(switch (cpe) {
+                case DoubleEntry de -> de::doubleValue;
+                case FloatEntry fe -> fe::floatValue;
+                case IntegerEntry ie -> ie::intValue;
+                case LongEntry le -> le::longValue;
+                case Utf8Entry ue -> ue::stringValue;
+                case ConstantDynamicEntry cde -> cde::asSymbol;
+                case InvokeDynamicEntry ide -> ide::asSymbol;
+                case ClassEntry ce -> ce::asSymbol;
+                case StringEntry se -> se::stringValue;
+                case MethodHandleEntry mhe -> mhe::asSymbol;
+                case MethodTypeEntry mte -> mte::asSymbol;
+                case FieldRefEntry fre -> {
+                    check.accept(fre.owner()::asSymbol);
+                    check.accept(fre::typeSymbol);
+                    yield () -> verifyFieldName(fre.name().stringValue());
+                }
+                case InterfaceMethodRefEntry imre -> {
+                    check.accept(imre.owner()::asSymbol);
+                    check.accept(imre::typeSymbol);
+                    yield () -> verifyMethodName(imre.name().stringValue());
+                }
+                case MethodRefEntry mre -> {
+                    check.accept(mre.owner()::asSymbol);
+                    check.accept(mre::typeSymbol);
+                    yield () -> verifyMethodName(mre.name().stringValue());
+                }
+                case ModuleEntry me -> me::asSymbol;
+                case NameAndTypeEntry nate -> {
+                    check.accept(nate.name()::stringValue);
+                    yield () -> nate.type().stringValue();
+                }
+                case PackageEntry pe -> pe::asSymbol;
+            });
+        }
+    }
+
+    private void verifyFieldName(String name) {
+        if (name.length() == 0 || name.chars().anyMatch(ch -> switch(ch) {
+                    case '.', ';', '[', '/' -> true;
+                    default -> false;
+                })) {
+              throw new VerifyError("Illegal field name %s in %s".formatted(name, toString(classModel)));
+        }
+    }
+
+    private void verifyMethodName(String name) {
+        if (!name.equals(INIT_NAME)
+            && !name.equals(CLASS_INIT_NAME)
+            && (name.length() == 0 || name.chars().anyMatch(ch -> switch(ch) {
+                    case '.', ';', '[', '/', '<', '>' -> true;
+                    default -> false;
+                }))) {
+              throw new VerifyError("Illegal method name %s in %s".formatted(name, toString(classModel)));
+        }
+    }
+
+    private void verifyInterfaces(List<VerifyError> errors) {
+        var intfs = new HashSet<ClassEntry>();
+        for (var intf : classModel.interfaces()) {
+            if (!intfs.add(intf)) {
+                errors.add(new VerifyError("Duplicate interface %s in %s".formatted(intf.asSymbol().displayName(), toString(classModel))));
+            }
+        }
+    }
+
+    private void verifyFields(List<VerifyError> errors) {
+        record F(Utf8Entry name, Utf8Entry type) {};
+        var fields = new HashSet<F>();
+        for (var f : classModel.fields()) try {
+            if (!fields.add(new F(f.fieldName(), f.fieldType()))) {
+                errors.add(new VerifyError("Duplicate field name %s with signature %s in %s".formatted(f.fieldName().stringValue(), f.fieldType().stringValue(), toString(classModel))));
+            }
+            verifyFieldName(f.fieldName().stringValue());
+        } catch (VerifyError ve) {
+            errors.add(ve);
+        }
+    }
+
+    private void verifyMethods(List<VerifyError> errors) {
+        record M(Utf8Entry name, Utf8Entry type) {};
+        var methods = new HashSet<M>();
+        for (var m : classModel.methods()) try {
+            if (!methods.add(new M(m.methodName(), m.methodType()))) {
+                errors.add(new VerifyError("Duplicate method name %s with signature %s in %s".formatted(m.methodName().stringValue(), m.methodType().stringValue(), toString(classModel))));
+            }
+            if (m.methodName().equalsString(CLASS_INIT_NAME)
+                    && !m.flags().has(AccessFlag.STATIC)) {
+                errors.add(new VerifyError("Method <clinit> is not static in %s".formatted(toString(classModel))));
+            }
+            if (classModel.flags().has(AccessFlag.INTERFACE)
+                    && m.methodName().equalsString(INIT_NAME)) {
+                errors.add(new VerifyError("Interface cannot have a method named <init> in %s".formatted(toString(classModel))));
+            }
+            verifyMethodName(m.methodName().stringValue());
+        } catch (VerifyError ve) {
+            errors.add(ve);
+        }
+    }
+
+    private void verifyAttributes(ClassFileElement cfe, List<VerifyError> errors) {
+        if (cfe instanceof AttributedElement ae) {
+            var attrNames = new HashSet<String>();
+            for (var a : ae.attributes()) {
+                if (!a.attributeMapper().allowMultiple() && !attrNames.add(a.attributeName())) {
+                    errors.add(new VerifyError("Multiple %s attributes in %s".formatted(a.attributeName(), toString(ae))));
+                }
+                verifyAttribute(ae, a, errors);
+            }
+        }
+        switch (cfe) {
+            case CompoundElement<?> comp -> {
+                for (var e : comp) verifyAttributes(e, errors);
+            }
+            case RecordAttribute ra -> {
+                for(var rc : ra.components()) verifyAttributes(rc, errors);
+            }
+            default -> {}
+        }
+    }
+
+    private void verifyAttribute(AttributedElement ae, Attribute<?> a, List<VerifyError> errors) {
+        int size = switch (a) {
+            case AnnotationDefaultAttribute aa ->
+                valueSize(aa.defaultValue());
+            case BootstrapMethodsAttribute bma ->
+                2 + bma.bootstrapMethods().stream().mapToInt(bm -> 4 + 2 * bm.arguments().size()).sum();
+            case CharacterRangeTableAttribute cra ->
+                2 + 14 * cra.characterRangeTable().size();
+            case CodeAttribute ca -> {
+                MethodModel mm = (MethodModel)ae;
+                if (mm.flags().has(AccessFlag.NATIVE) || mm.flags().has(AccessFlag.ABSTRACT)) {
+                    errors.add(new VerifyError("Code attribute in native or abstract %s".formatted(toString(ae))));
+                }
+                if (ca.maxLocals() < Util.maxLocals(mm.flags().flagsMask(), mm.methodTypeSymbol())) {
+                    errors.add(new VerifyError("Arguments can't fit into locals in %s".formatted(toString(ae))));
+                }
+                yield 10 + ca.codeLength() + 8 * ca.exceptionHandlers().size() + attributesSize(ca.attributes());
+            }
+            case CompilationIDAttribute cida -> {
+                cida.compilationId();
+                yield 2;
+            }
+            case ConstantValueAttribute cva -> {
+                ClassDesc type = ((FieldModel)ae).fieldTypeSymbol();
+                ConstantValueEntry cve = cva.constant();
+                if (!switch (TypeKind.from(type)) {
+                    case BooleanType, ByteType, CharType, IntType, ShortType -> cve instanceof IntegerEntry;
+                    case DoubleType -> cve instanceof DoubleEntry;
+                    case FloatType -> cve instanceof FloatEntry;
+                    case LongType -> cve instanceof LongEntry;
+                    case ReferenceType -> type.equals(ConstantDescs.CD_String) && cve instanceof StringEntry;
+                    case VoidType -> false;
+                }) {
+                    errors.add(new VerifyError("Bad constant value type in %s".formatted(toString(ae))));
+                }
+                yield 2;
+            }
+            case DeprecatedAttribute _ ->
+                0;
+            case EnclosingMethodAttribute ema -> {
+                ema.enclosingClass();
+                ema.enclosingMethod();
+                yield 4;
+            }
+            case ExceptionsAttribute ea ->
+                2 + 2 * ea.exceptions().size();
+            case InnerClassesAttribute ica -> {
+                for (var ici : ica.classes()) {
+                    if (ici.outerClass().isPresent() && ici.outerClass().get().equals(ici.innerClass())) {
+                        errors.add(new VerifyError("Class is both outer and inner class in %s".formatted(toString(ae))));
+                    }
+                }
+                yield 2 + 8 * ica.classes().size();
+            }
+            case LineNumberTableAttribute lta ->
+                2 + 4 * lta.lineNumbers().size();
+            case LocalVariableTableAttribute lvta ->
+                2 + 10 * lvta.localVariables().size();
+            case LocalVariableTypeTableAttribute lvta ->
+                2 + 10 * lvta.localVariableTypes().size();
+            case MethodParametersAttribute mpa ->
+                1 + 4 * mpa.parameters().size();
+            case ModuleAttribute ma ->
+                16 + subSize(ma.exports(), ModuleExportInfo::exportsTo, 6, 2)
+                   + subSize(ma.opens(), ModuleOpenInfo::opensTo, 6, 2)
+                   + subSize(ma.provides(), ModuleProvideInfo::providesWith, 4, 2)
+                   + 6 * ma.requires().size()
+                   + 2 * ma.uses().size();
+            case ModuleHashesAttribute mha ->
+                2 + moduleHashesSize(mha.hashes());
+            case ModuleMainClassAttribute mmca -> {
+                mmca.mainClass();
+                yield 2;
+            }
+            case ModulePackagesAttribute mpa ->
+                2 + 2 * mpa.packages().size();
+            case ModuleResolutionAttribute mra ->
+                2;
+            case ModuleTargetAttribute mta -> {
+                mta.targetPlatform();
+                yield 2;
+            }
+            case NestHostAttribute nha -> {
+                nha.nestHost();
+                yield 2;
+            }
+            case NestMembersAttribute nma -> {
+                if (ae.findAttribute(Attributes.nestHost()).isPresent()) {
+                    errors.add(new VerifyError("Conflicting NestHost and NestMembers attributes in %s".formatted(toString(ae))));
+                }
+                yield 2 + 2 * nma.nestMembers().size();
+            }
+            case PermittedSubclassesAttribute psa -> {
+                if (classModel.flags().has(AccessFlag.FINAL)) {
+                    errors.add(new VerifyError("PermittedSubclasses attribute in final %s".formatted(toString(ae))));
+                }
+                yield 2 + 2 * psa.permittedSubclasses().size();
+            }
+            case RecordAttribute ra ->
+                componentsSize(ra.components());
+            case RuntimeVisibleAnnotationsAttribute aa ->
+                annotationsSize(aa.annotations());
+            case RuntimeInvisibleAnnotationsAttribute aa ->
+                annotationsSize(aa.annotations());
+            case RuntimeVisibleTypeAnnotationsAttribute aa ->
+                typeAnnotationsSize(aa.annotations());
+            case RuntimeInvisibleTypeAnnotationsAttribute aa ->
+                typeAnnotationsSize(aa.annotations());
+            case RuntimeVisibleParameterAnnotationsAttribute aa ->
+                parameterAnnotationsSize(aa.parameterAnnotations());
+            case RuntimeInvisibleParameterAnnotationsAttribute aa ->
+                parameterAnnotationsSize(aa.parameterAnnotations());
+            case SignatureAttribute sa -> {
+                sa.signature();
+                yield 2;
+            }
+            case SourceDebugExtensionAttribute sda ->
+                sda.contents().length;
+            case SourceFileAttribute sfa -> {
+                sfa.sourceFile();
+                yield 2;
+            }
+            case SourceIDAttribute sida -> {
+                sida.sourceId();
+                yield 2;
+            }
+            case StackMapTableAttribute smta ->
+                2 + subSize(smta.entries(), frame -> stackMapFrameSize(frame));
+            case SyntheticAttribute _ ->
+                0;
+            case UnknownAttribute _ ->
+                -1;
+            case CustomAttribute<?> _ ->
+                -1;
+            default -> // should not happen if all known attributes are verified
+                throw new AssertionError(a);
+        };
+        if (size >= 0 && size != ((BoundAttribute)a).payloadLen()) {
+            errors.add(new VerifyError("Wrong %s attribute length in %s".formatted(a.attributeName(), toString(ae))));
+        }
+    }
+
+    private static <T, S extends Collection<?>> int subSize(Collection<T> entries, Function<T, S> subMH, int entrySize, int subSize) {
+        return subSize(entries, (ToIntFunction<T>) t -> entrySize + subSize * subMH.apply(t).size());
+    }
+
+    private static <T> int subSize(Collection<T> entries, ToIntFunction<T> subMH) {
+        int l = 0;
+        for (T entry : entries) {
+            l += subMH.applyAsInt(entry);
+        }
+        return l;
+    }
+
+    private static int componentsSize(List<RecordComponentInfo> comps) {
+        int l = 2;
+        for (var rc : comps) {
+            l += 4 + attributesSize(rc.attributes());
+        }
+        return l;
+    }
+
+    private static int attributesSize(List<Attribute<?>> attrs) {
+        int l = 2;
+        for (var a : attrs) {
+            l += 6 + ((BoundAttribute)a).payloadLen();
+        }
+        return l;
+    }
+
+    private static int parameterAnnotationsSize(List<List<Annotation>> pans) {
+        int l = 1;
+        for (var ans : pans) {
+            l += annotationsSize(ans);
+        }
+        return l;
+    }
+
+    private static int annotationsSize(List<Annotation> ans) {
+        int l = 2;
+        for (var an : ans) {
+            l += annotationSize(an);
+        }
+        return l;
+    }
+
+    private static int typeAnnotationsSize(List<TypeAnnotation> ans) {
+        int l = 2;
+        for (var an : ans) {
+            l += 2 + an.targetInfo().size() + 2 * an.targetPath().size() + annotationSize(an);
+        }
+        return l;
+    }
+
+    private static int annotationSize(Annotation an) {
+        int l = 4;
+        for (var el : an.elements()) {
+            l += 2 + valueSize(el.value());
+        }
+        return l;
+    }
+
+    private static int valueSize(AnnotationValue val) {
+        return 1 + switch (val) {
+            case AnnotationValue.OfAnnotation oan ->
+                annotationSize(oan.annotation());
+            case AnnotationValue.OfArray oar -> {
+                int l = 2;
+                for (var v : oar.values()) {
+                    l += valueSize(v);
+                }
+                yield l;
+            }
+            case AnnotationValue.OfConstant _, AnnotationValue.OfClass _ -> 2;
+            case AnnotationValue.OfEnum _ -> 4;
+        };
+    }
+
+    private static int moduleHashesSize(List<ModuleHashInfo> hashes) {
+        int l = 2;
+        for (var h : hashes) {
+            h.moduleName();
+            l += 4 + h.hash().length;
+        }
+        return l;
+    }
+
+    private int stackMapFrameSize(StackMapFrameInfo frame) {
+        int ft = frame.frameType();
+        if (ft < 64) return 1;
+        if (ft < 128) return 1 + verificationTypeSize(frame.stack().getFirst());
+        if (ft > 246) {
+            if (ft == 247) return 3 + verificationTypeSize(frame.stack().getFirst());
+            if (ft < 252) return 3;
+            if (ft < 255) {
+                var loc = frame.locals();
+                int l = 3;
+                for (int i = loc.size() + 251 - ft; i < loc.size(); i++) {
+                    l += verificationTypeSize(loc.get(i));
+                }
+                return l;
+            }
+            if (ft == 255) {
+                int l = 7;
+                for (var vt : frame.stack()) {
+                    l += verificationTypeSize(vt);
+                }
+                for (var vt : frame.locals()) {
+                    l += verificationTypeSize(vt);
+                }
+                return l;
+            }
+        }
+        throw new IllegalArgumentException("Invalid stack map frame type " + ft);
+    }
+
+    private static int verificationTypeSize(StackMapFrameInfo.VerificationTypeInfo vti) {
+        return switch (vti) {
+            case StackMapFrameInfo.SimpleVerificationTypeInfo _ -> 1;
+            case StackMapFrameInfo.ObjectVerificationTypeInfo ovti -> {
+                ovti.classSymbol();
+                yield 3;
+            }
+            case StackMapFrameInfo.UninitializedVerificationTypeInfo _ -> 3;
+        };
+    }
+
+    private String className() {
+        return classModel.thisClass().asSymbol().displayName();
+    }
+
+    private String toString(AttributedElement ae) {
+        return switch (ae) {
+            case CodeModel m -> "Code attribute for " + toString(m.parent().get());
+            case FieldModel m -> "field %s.%s".formatted(
+                    className(),
+                    m.fieldName().stringValue());
+            case MethodModel m -> "method %s::%s(%s)".formatted(
+                    className(),
+                    m.methodName().stringValue(),
+                    m.methodTypeSymbol().parameterList().stream().map(ClassDesc::displayName).collect(Collectors.joining(",")));
+            case RecordComponentInfo i -> "Record component %s of class %s".formatted(
+                    i.name().stringValue(),
+                    className());
+            default -> "class " + className();
+        };
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/classfile/impl/verifier/VerificationBytecodes.class b/tests/test_data/std/jdk/internal/classfile/impl/verifier/VerificationBytecodes.class
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/classfile/impl/verifier/VerificationBytecodes.java b/tests/test_data/std/jdk/internal/classfile/impl/verifier/VerificationBytecodes.java
new file mode 100644
index 00000000..c9b076aa
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/classfile/impl/verifier/VerificationBytecodes.java
@@ -0,0 +1,384 @@
+/*
+ * Copyright (c) 2022, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package jdk.internal.classfile.impl.verifier;
+
+import java.nio.ByteBuffer;
+
+import java.lang.classfile.ClassFile;
+import jdk.internal.classfile.impl.verifier.VerificationSignature.BasicType;
+import static jdk.internal.classfile.impl.verifier.VerificationSignature.BasicType.*;
+
+/**
+ * @see <a href="https://raw.githubusercontent.com/openjdk/jdk/master/src/hotspot/share/interpreter/bytecodes.hpp">hotspot/share/interpreter/bytecodes.hpp</a>
+ * @see <a href="https://raw.githubusercontent.com/openjdk/jdk/master/src/hotspot/share/interpreter/bytecodes.cpp">hotspot/share/interpreter/bytecodes.cpp</a>
+ */
+final class VerificationBytecodes {
+
+    static final int _breakpoint = 202,
+            _fast_agetfield = 203,
+            _fast_bgetfield = 204,
+            _fast_cgetfield = 205,
+            _fast_dgetfield = 206,
+            _fast_fgetfield = 207,
+            _fast_igetfield = 208,
+            _fast_lgetfield = 209,
+            _fast_sgetfield = 210,
+            _fast_aputfield = 211,
+            _fast_bputfield = 212,
+            _fast_zputfield = 213,
+            _fast_cputfield = 214,
+            _fast_dputfield = 215,
+            _fast_fputfield = 216,
+            _fast_iputfield = 217,
+            _fast_lputfield = 218,
+            _fast_sputfield = 219,
+            _fast_aload_0 = 220,
+            _fast_iaccess_0 = 221,
+            _fast_aaccess_0 = 222,
+            _fast_faccess_0 = 223,
+            _fast_iload = 224,
+            _fast_iload2 = 225,
+            _fast_icaload = 226,
+            _fast_invokevfinal = 227,
+            _fast_linearswitch = 228,
+            _fast_binaryswitch = 229,
+            _fast_aldc = 230,
+            _fast_aldc_w = 231,
+            _return_register_finalizer = 232,
+            _invokehandle = 233,
+            _nofast_getfield = 234,
+            _nofast_putfield = 235,
+            _nofast_aload_0 = 236,
+            _nofast_iload = 237,
+            _shouldnotreachhere = 238,
+            number_of_codes = 239;
+
+    static int code_or_bp_at(byte[] code, int bci) {
+        return code[bci] & 0xff;
+    }
+
+    static boolean is_valid(int code) {
+        return 0 <= code && code < number_of_codes;
+    }
+
+    static int wide_length_for(int code) {
+        return is_valid(code) ? _lengths[code] >> 4 : -1;
+    }
+
+    static boolean is_store_into_local(int code) {
+        return (ClassFile.ISTORE <= code && code <= ClassFile.ASTORE_3);
+    }
+
+    static final int _lengths[] = new int[number_of_codes];
+
+    static int special_length_at(int code, byte bytecode[], int bci, int end) {
+        switch (code) {
+            case ClassFile.WIDE:
+                if (bci + 1 >= end) {
+                    return -1;
+                }
+                return wide_length_for(bytecode[bci + 1] & 0xff);
+            case ClassFile.TABLESWITCH:
+                int aligned_bci = align(bci + 1);
+                if (aligned_bci + 3 * 4 >= end) {
+                    return -1;
+                }
+                ByteBuffer bb = ByteBuffer.wrap(bytecode, aligned_bci + 1 * 4, 2 * 4);
+                int lo = bb.getInt();
+                int hi = bb.getInt();
+                int len = aligned_bci - bci + (3 + hi - lo + 1) * 4;
+                return len > 0 ? len : -1;
+            case ClassFile.LOOKUPSWITCH:
+            case _fast_binaryswitch:
+            case _fast_linearswitch:
+                aligned_bci = align(bci + 1);
+                if (aligned_bci + 2 * 4 >= end) {
+                    return -1;
+                }
+                int npairs = ByteBuffer.wrap(bytecode, aligned_bci + 4, 4).getInt();
+                len = aligned_bci - bci + (2 + 2 * npairs) * 4;
+                return len > 0 ? len : -1;
+            default:
+                return 0;
+        }
+    }
+
+    static int align(int n) {
+        return (n + 3) & ~3;
+    }
+
+    static void def(int code, String name, String format, String wide_format, BasicType result_type, int depth) {
+        def(code, name, format, wide_format, result_type, depth, code);
+    }
+
+    static void def(int code, String name, String format, String wide_format, BasicType result_type, int depth, int java_code) {
+        if (wide_format != null && format == null) throw new IllegalArgumentException("short form must exist if there's a wide form");
+        int len = format != null ? format.length() : 0;
+        int wlen = wide_format != null ? wide_format.length() : 0;
+        _lengths[code] = (wlen << 4) | (len & 0xf);
+    }
+
+    static {
+        def(ClassFile.NOP, "nop", "b", null, T_VOID, 0);
+        def(ClassFile.ACONST_NULL, "aconst_null", "b", null, T_OBJECT, 1);
+        def(ClassFile.ICONST_M1, "iconst_m1", "b", null, T_INT, 1);
+        def(ClassFile.ICONST_0, "iconst_0", "b", null, T_INT, 1);
+        def(ClassFile.ICONST_1, "iconst_1", "b", null, T_INT, 1);
+        def(ClassFile.ICONST_2, "iconst_2", "b", null, T_INT, 1);
+        def(ClassFile.ICONST_3, "iconst_3", "b", null, T_INT, 1);
+        def(ClassFile.ICONST_4, "iconst_4", "b", null, T_INT, 1);
+        def(ClassFile.ICONST_5, "iconst_5", "b", null, T_INT, 1);
+        def(ClassFile.LCONST_0, "lconst_0", "b", null, T_LONG, 2);
+        def(ClassFile.LCONST_1, "lconst_1", "b", null, T_LONG, 2);
+        def(ClassFile.FCONST_0, "fconst_0", "b", null, T_FLOAT, 1);
+        def(ClassFile.FCONST_1, "fconst_1", "b", null, T_FLOAT, 1);
+        def(ClassFile.FCONST_2, "fconst_2", "b", null, T_FLOAT, 1);
+        def(ClassFile.DCONST_0, "dconst_0", "b", null, T_DOUBLE, 2);
+        def(ClassFile.DCONST_1, "dconst_1", "b", null, T_DOUBLE, 2);
+        def(ClassFile.BIPUSH, "bipush", "bc", null, T_INT, 1);
+        def(ClassFile.SIPUSH, "sipush", "bcc", null, T_INT, 1);
+        def(ClassFile.LDC, "ldc", "bk", null, T_ILLEGAL, 1);
+        def(ClassFile.LDC_W, "ldc_w", "bkk", null, T_ILLEGAL, 1);
+        def(ClassFile.LDC2_W, "ldc2_w", "bkk", null, T_ILLEGAL, 2);
+        def(ClassFile.ILOAD, "iload", "bi", "wbii", T_INT, 1);
+        def(ClassFile.LLOAD, "lload", "bi", "wbii", T_LONG, 2);
+        def(ClassFile.FLOAD, "fload", "bi", "wbii", T_FLOAT, 1);
+        def(ClassFile.DLOAD, "dload", "bi", "wbii", T_DOUBLE, 2);
+        def(ClassFile.ALOAD, "aload", "bi", "wbii", T_OBJECT, 1);
+        def(ClassFile.ILOAD_0, "iload_0", "b", null, T_INT, 1);
+        def(ClassFile.ILOAD_1, "iload_1", "b", null, T_INT, 1);
+        def(ClassFile.ILOAD_2, "iload_2", "b", null, T_INT, 1);
+        def(ClassFile.ILOAD_3, "iload_3", "b", null, T_INT, 1);
+        def(ClassFile.LLOAD_0, "lload_0", "b", null, T_LONG, 2);
+        def(ClassFile.LLOAD_1, "lload_1", "b", null, T_LONG, 2);
+        def(ClassFile.LLOAD_2, "lload_2", "b", null, T_LONG, 2);
+        def(ClassFile.LLOAD_3, "lload_3", "b", null, T_LONG, 2);
+        def(ClassFile.FLOAD_0, "fload_0", "b", null, T_FLOAT, 1);
+        def(ClassFile.FLOAD_1, "fload_1", "b", null, T_FLOAT, 1);
+        def(ClassFile.FLOAD_2, "fload_2", "b", null, T_FLOAT, 1);
+        def(ClassFile.FLOAD_3, "fload_3", "b", null, T_FLOAT, 1);
+        def(ClassFile.DLOAD_0, "dload_0", "b", null, T_DOUBLE, 2);
+        def(ClassFile.DLOAD_1, "dload_1", "b", null, T_DOUBLE, 2);
+        def(ClassFile.DLOAD_2, "dload_2", "b", null, T_DOUBLE, 2);
+        def(ClassFile.DLOAD_3, "dload_3", "b", null, T_DOUBLE, 2);
+        def(ClassFile.ALOAD_0, "aload_0", "b", null, T_OBJECT, 1);
+        def(ClassFile.ALOAD_1, "aload_1", "b", null, T_OBJECT, 1);
+        def(ClassFile.ALOAD_2, "aload_2", "b", null, T_OBJECT, 1);
+        def(ClassFile.ALOAD_3, "aload_3", "b", null, T_OBJECT, 1);
+        def(ClassFile.IALOAD, "iaload", "b", null, T_INT, -1);
+        def(ClassFile.LALOAD, "laload", "b", null, T_LONG, 0);
+        def(ClassFile.FALOAD, "faload", "b", null, T_FLOAT, -1);
+        def(ClassFile.DALOAD, "daload", "b", null, T_DOUBLE, 0);
+        def(ClassFile.AALOAD, "aaload", "b", null, T_OBJECT, -1);
+        def(ClassFile.BALOAD, "baload", "b", null, T_INT, -1);
+        def(ClassFile.CALOAD, "caload", "b", null, T_INT, -1);
+        def(ClassFile.SALOAD, "saload", "b", null, T_INT, -1);
+        def(ClassFile.ISTORE, "istore", "bi", "wbii", T_VOID, -1);
+        def(ClassFile.LSTORE, "lstore", "bi", "wbii", T_VOID, -2);
+        def(ClassFile.FSTORE, "fstore", "bi", "wbii", T_VOID, -1);
+        def(ClassFile.DSTORE, "dstore", "bi", "wbii", T_VOID, -2);
+        def(ClassFile.ASTORE, "astore", "bi", "wbii", T_VOID, -1);
+        def(ClassFile.ISTORE_0, "istore_0", "b", null, T_VOID, -1);
+        def(ClassFile.ISTORE_1, "istore_1", "b", null, T_VOID, -1);
+        def(ClassFile.ISTORE_2, "istore_2", "b", null, T_VOID, -1);
+        def(ClassFile.ISTORE_3, "istore_3", "b", null, T_VOID, -1);
+        def(ClassFile.LSTORE_0, "lstore_0", "b", null, T_VOID, -2);
+        def(ClassFile.LSTORE_1, "lstore_1", "b", null, T_VOID, -2);
+        def(ClassFile.LSTORE_2, "lstore_2", "b", null, T_VOID, -2);
+        def(ClassFile.LSTORE_3, "lstore_3", "b", null, T_VOID, -2);
+        def(ClassFile.FSTORE_0, "fstore_0", "b", null, T_VOID, -1);
+        def(ClassFile.FSTORE_1, "fstore_1", "b", null, T_VOID, -1);
+        def(ClassFile.FSTORE_2, "fstore_2", "b", null, T_VOID, -1);
+        def(ClassFile.FSTORE_3, "fstore_3", "b", null, T_VOID, -1);
+        def(ClassFile.DSTORE_0, "dstore_0", "b", null, T_VOID, -2);
+        def(ClassFile.DSTORE_1, "dstore_1", "b", null, T_VOID, -2);
+        def(ClassFile.DSTORE_2, "dstore_2", "b", null, T_VOID, -2);
+        def(ClassFile.DSTORE_3, "dstore_3", "b", null, T_VOID, -2);
+        def(ClassFile.ASTORE_0, "astore_0", "b", null, T_VOID, -1);
+        def(ClassFile.ASTORE_1, "astore_1", "b", null, T_VOID, -1);
+        def(ClassFile.ASTORE_2, "astore_2", "b", null, T_VOID, -1);
+        def(ClassFile.ASTORE_3, "astore_3", "b", null, T_VOID, -1);
+        def(ClassFile.IASTORE, "iastore", "b", null, T_VOID, -3);
+        def(ClassFile.LASTORE, "lastore", "b", null, T_VOID, -4);
+        def(ClassFile.FASTORE, "fastore", "b", null, T_VOID, -3);
+        def(ClassFile.DASTORE, "dastore", "b", null, T_VOID, -4);
+        def(ClassFile.AASTORE, "aastore", "b", null, T_VOID, -3);
+        def(ClassFile.BASTORE, "bastore", "b", null, T_VOID, -3);
+        def(ClassFile.CASTORE, "castore", "b", null, T_VOID, -3);
+        def(ClassFile.SASTORE, "sastore", "b", null, T_VOID, -3);
+        def(ClassFile.POP, "pop", "b", null, T_VOID, -1);
+        def(ClassFile.POP2, "pop2", "b", null, T_VOID, -2);
+        def(ClassFile.DUP, "dup", "b", null, T_VOID, 1);
+        def(ClassFile.DUP_X1, "dup_x1", "b", null, T_VOID, 1);
+        def(ClassFile.DUP_X2, "dup_x2", "b", null, T_VOID, 1);
+        def(ClassFile.DUP2, "dup2", "b", null, T_VOID, 2);
+        def(ClassFile.DUP2_X1, "dup2_x1", "b", null, T_VOID, 2);
+        def(ClassFile.DUP2_X2, "dup2_x2", "b", null, T_VOID, 2);
+        def(ClassFile.SWAP, "swap", "b", null, T_VOID, 0);
+        def(ClassFile.IADD, "iadd", "b", null, T_INT, -1);
+        def(ClassFile.LADD, "ladd", "b", null, T_LONG, -2);
+        def(ClassFile.FADD, "fadd", "b", null, T_FLOAT, -1);
+        def(ClassFile.DADD, "dadd", "b", null, T_DOUBLE, -2);
+        def(ClassFile.ISUB, "isub", "b", null, T_INT, -1);
+        def(ClassFile.LSUB, "lsub", "b", null, T_LONG, -2);
+        def(ClassFile.FSUB, "fsub", "b", null, T_FLOAT, -1);
+        def(ClassFile.DSUB, "dsub", "b", null, T_DOUBLE, -2);
+        def(ClassFile.IMUL, "imul", "b", null, T_INT, -1);
+        def(ClassFile.LMUL, "lmul", "b", null, T_LONG, -2);
+        def(ClassFile.FMUL, "fmul", "b", null, T_FLOAT, -1);
+        def(ClassFile.DMUL, "dmul", "b", null, T_DOUBLE, -2);
+        def(ClassFile.IDIV, "idiv", "b", null, T_INT, -1);
+        def(ClassFile.LDIV, "ldiv", "b", null, T_LONG, -2);
+        def(ClassFile.FDIV, "fdiv", "b", null, T_FLOAT, -1);
+        def(ClassFile.DDIV, "ddiv", "b", null, T_DOUBLE, -2);
+        def(ClassFile.IREM, "irem", "b", null, T_INT, -1);
+        def(ClassFile.LREM, "lrem", "b", null, T_LONG, -2);
+        def(ClassFile.FREM, "frem", "b", null, T_FLOAT, -1);
+        def(ClassFile.DREM, "drem", "b", null, T_DOUBLE, -2);
+        def(ClassFile.INEG, "ineg", "b", null, T_INT, 0);
+        def(ClassFile.LNEG, "lneg", "b", null, T_LONG, 0);
+        def(ClassFile.FNEG, "fneg", "b", null, T_FLOAT, 0);
+        def(ClassFile.DNEG, "dneg", "b", null, T_DOUBLE, 0);
+        def(ClassFile.ISHL, "ishl", "b", null, T_INT, -1);
+        def(ClassFile.LSHL, "lshl", "b", null, T_LONG, -1);
+        def(ClassFile.ISHR, "ishr", "b", null, T_INT, -1);
+        def(ClassFile.LSHR, "lshr", "b", null, T_LONG, -1);
+        def(ClassFile.IUSHR, "iushr", "b", null, T_INT, -1);
+        def(ClassFile.LUSHR, "lushr", "b", null, T_LONG, -1);
+        def(ClassFile.IAND, "iand", "b", null, T_INT, -1);
+        def(ClassFile.LAND, "land", "b", null, T_LONG, -2);
+        def(ClassFile.IOR, "ior", "b", null, T_INT, -1);
+        def(ClassFile.LOR, "lor", "b", null, T_LONG, -2);
+        def(ClassFile.IXOR, "ixor", "b", null, T_INT, -1);
+        def(ClassFile.LXOR, "lxor", "b", null, T_LONG, -2);
+        def(ClassFile.IINC, "iinc", "bic", "wbiicc", T_VOID, 0);
+        def(ClassFile.I2L, "i2l", "b", null, T_LONG, 1);
+        def(ClassFile.I2F, "i2f", "b", null, T_FLOAT, 0);
+        def(ClassFile.I2D, "i2d", "b", null, T_DOUBLE, 1);
+        def(ClassFile.L2I, "l2i", "b", null, T_INT, -1);
+        def(ClassFile.L2F, "l2f", "b", null, T_FLOAT, -1);
+        def(ClassFile.L2D, "l2d", "b", null, T_DOUBLE, 0);
+        def(ClassFile.F2I, "f2i", "b", null, T_INT, 0);
+        def(ClassFile.F2L, "f2l", "b", null, T_LONG, 1);
+        def(ClassFile.F2D, "f2d", "b", null, T_DOUBLE, 1);
+        def(ClassFile.D2I, "d2i", "b", null, T_INT, -1);
+        def(ClassFile.D2L, "d2l", "b", null, T_LONG, 0);
+        def(ClassFile.D2F, "d2f", "b", null, T_FLOAT, -1);
+        def(ClassFile.I2B, "i2b", "b", null, T_BYTE, 0);
+        def(ClassFile.I2C, "i2c", "b", null, T_CHAR, 0);
+        def(ClassFile.I2S, "i2s", "b", null, T_SHORT, 0);
+        def(ClassFile.LCMP, "lcmp", "b", null, T_VOID, -3);
+        def(ClassFile.FCMPL, "fcmpl", "b", null, T_VOID, -1);
+        def(ClassFile.FCMPG, "fcmpg", "b", null, T_VOID, -1);
+        def(ClassFile.DCMPL, "dcmpl", "b", null, T_VOID, -3);
+        def(ClassFile.DCMPG, "dcmpg", "b", null, T_VOID, -3);
+        def(ClassFile.IFEQ, "ifeq", "boo", null, T_VOID, -1);
+        def(ClassFile.IFNE, "ifne", "boo", null, T_VOID, -1);
+        def(ClassFile.IFLT, "iflt", "boo", null, T_VOID, -1);
+        def(ClassFile.IFGE, "ifge", "boo", null, T_VOID, -1);
+        def(ClassFile.IFGT, "ifgt", "boo", null, T_VOID, -1);
+        def(ClassFile.IFLE, "ifle", "boo", null, T_VOID, -1);
+        def(ClassFile.IF_ICMPEQ, "if_icmpeq", "boo", null, T_VOID, -2);
+        def(ClassFile.IF_ICMPNE, "if_icmpne", "boo", null, T_VOID, -2);
+        def(ClassFile.IF_ICMPLT, "if_icmplt", "boo", null, T_VOID, -2);
+        def(ClassFile.IF_ICMPGE, "if_icmpge", "boo", null, T_VOID, -2);
+        def(ClassFile.IF_ICMPGT, "if_icmpgt", "boo", null, T_VOID, -2);
+        def(ClassFile.IF_ICMPLE, "if_icmple", "boo", null, T_VOID, -2);
+        def(ClassFile.IF_ACMPEQ, "if_acmpeq", "boo", null, T_VOID, -2);
+        def(ClassFile.IF_ACMPNE, "if_acmpne", "boo", null, T_VOID, -2);
+        def(ClassFile.GOTO, "goto", "boo", null, T_VOID, 0);
+        def(ClassFile.JSR, "jsr", "boo", null, T_INT, 0);
+        def(ClassFile.RET, "ret", "bi", "wbii", T_VOID, 0);
+        def(ClassFile.TABLESWITCH, "tableswitch", "", null, T_VOID, -1); // may have backward branches
+        def(ClassFile.LOOKUPSWITCH, "lookupswitch", "", null, T_VOID, -1); // rewriting in interpreter
+        def(ClassFile.IRETURN, "ireturn", "b", null, T_INT, -1);
+        def(ClassFile.LRETURN, "lreturn", "b", null, T_LONG, -2);
+        def(ClassFile.FRETURN, "freturn", "b", null, T_FLOAT, -1);
+        def(ClassFile.DRETURN, "dreturn", "b", null, T_DOUBLE, -2);
+        def(ClassFile.ARETURN, "areturn", "b", null, T_OBJECT, -1);
+        def(ClassFile.RETURN, "return", "b", null, T_VOID, 0);
+        def(ClassFile.GETSTATIC, "getstatic", "bJJ", null, T_ILLEGAL, 1);
+        def(ClassFile.PUTSTATIC, "putstatic", "bJJ", null, T_ILLEGAL, -1);
+        def(ClassFile.GETFIELD, "getfield", "bJJ", null, T_ILLEGAL, 0);
+        def(ClassFile.PUTFIELD, "putfield", "bJJ", null, T_ILLEGAL, -2);
+        def(ClassFile.INVOKEVIRTUAL, "invokevirtual", "bJJ", null, T_ILLEGAL, -1);
+        def(ClassFile.INVOKESPECIAL, "invokespecial", "bJJ", null, T_ILLEGAL, -1);
+        def(ClassFile.INVOKESTATIC, "invokestatic", "bJJ", null, T_ILLEGAL, 0);
+        def(ClassFile.INVOKEINTERFACE, "invokeinterface", "bJJ__", null, T_ILLEGAL, -1);
+        def(ClassFile.INVOKEDYNAMIC, "invokedynamic", "bJJJJ", null, T_ILLEGAL, 0);
+        def(ClassFile.NEW, "new", "bkk", null, T_OBJECT, 1);
+        def(ClassFile.NEWARRAY, "newarray", "bc", null, T_OBJECT, 0);
+        def(ClassFile.ANEWARRAY, "anewarray", "bkk", null, T_OBJECT, 0);
+        def(ClassFile.ARRAYLENGTH, "arraylength", "b", null, T_VOID, 0);
+        def(ClassFile.ATHROW, "athrow", "b", null, T_VOID, -1);
+        def(ClassFile.CHECKCAST, "checkcast", "bkk", null, T_OBJECT, 0);
+        def(ClassFile.INSTANCEOF, "instanceof", "bkk", null, T_INT, 0);
+        def(ClassFile.MONITORENTER, "monitorenter", "b", null, T_VOID, -1);
+        def(ClassFile.MONITOREXIT, "monitorexit", "b", null, T_VOID, -1);
+        def(ClassFile.WIDE, "wide", "", null, T_VOID, 0);
+        def(ClassFile.MULTIANEWARRAY, "multianewarray", "bkkc", null, T_OBJECT, 1);
+        def(ClassFile.IFNULL, "ifnull", "boo", null, T_VOID, -1);
+        def(ClassFile.IFNONNULL, "ifnonnull", "boo", null, T_VOID, -1);
+        def(ClassFile.GOTO_W, "goto_w", "boooo", null, T_VOID, 0);
+        def(ClassFile.JSR_W, "jsr_w", "boooo", null, T_INT, 0);
+        def(_breakpoint, "breakpoint", "", null, T_VOID, 0);
+        def(_fast_agetfield, "fast_agetfield", "bJJ", null, T_OBJECT, 0, ClassFile.GETFIELD);
+        def(_fast_bgetfield, "fast_bgetfield", "bJJ", null, T_INT, 0, ClassFile.GETFIELD);
+        def(_fast_cgetfield, "fast_cgetfield", "bJJ", null, T_CHAR, 0, ClassFile.GETFIELD);
+        def(_fast_dgetfield, "fast_dgetfield", "bJJ", null, T_DOUBLE, 0, ClassFile.GETFIELD);
+        def(_fast_fgetfield, "fast_fgetfield", "bJJ", null, T_FLOAT, 0, ClassFile.GETFIELD);
+        def(_fast_igetfield, "fast_igetfield", "bJJ", null, T_INT, 0, ClassFile.GETFIELD);
+        def(_fast_lgetfield, "fast_lgetfield", "bJJ", null, T_LONG, 0, ClassFile.GETFIELD);
+        def(_fast_sgetfield, "fast_sgetfield", "bJJ", null, T_SHORT, 0, ClassFile.GETFIELD);
+        def(_fast_aputfield, "fast_aputfield", "bJJ", null, T_OBJECT, 0, ClassFile.PUTFIELD);
+        def(_fast_bputfield, "fast_bputfield", "bJJ", null, T_INT, 0, ClassFile.PUTFIELD);
+        def(_fast_zputfield, "fast_zputfield", "bJJ", null, T_INT, 0, ClassFile.PUTFIELD);
+        def(_fast_cputfield, "fast_cputfield", "bJJ", null, T_CHAR, 0, ClassFile.PUTFIELD);
+        def(_fast_dputfield, "fast_dputfield", "bJJ", null, T_DOUBLE, 0, ClassFile.PUTFIELD);
+        def(_fast_fputfield, "fast_fputfield", "bJJ", null, T_FLOAT, 0, ClassFile.PUTFIELD);
+        def(_fast_iputfield, "fast_iputfield", "bJJ", null, T_INT, 0, ClassFile.PUTFIELD);
+        def(_fast_lputfield, "fast_lputfield", "bJJ", null, T_LONG, 0, ClassFile.PUTFIELD);
+        def(_fast_sputfield, "fast_sputfield", "bJJ", null, T_SHORT, 0, ClassFile.PUTFIELD);
+        def(_fast_aload_0, "fast_aload_0", "b", null, T_OBJECT, 1, ClassFile.ALOAD_0);
+        def(_fast_iaccess_0, "fast_iaccess_0", "b_JJ", null, T_INT, 1, ClassFile.ALOAD_0);
+        def(_fast_aaccess_0, "fast_aaccess_0", "b_JJ", null, T_OBJECT, 1, ClassFile.ALOAD_0);
+        def(_fast_faccess_0, "fast_faccess_0", "b_JJ", null, T_OBJECT, 1, ClassFile.ALOAD_0);
+        def(_fast_iload, "fast_iload", "bi", null, T_INT, 1, ClassFile.ILOAD);
+        def(_fast_iload2, "fast_iload2", "bi_i", null, T_INT, 2, ClassFile.ILOAD);
+        def(_fast_icaload, "fast_icaload", "bi_", null, T_INT, 0, ClassFile.ILOAD);
+        def(_fast_invokevfinal, "fast_invokevfinal", "bJJ", null, T_ILLEGAL, -1, ClassFile.INVOKEVIRTUAL);
+        def(_fast_linearswitch, "fast_linearswitch", "", null, T_VOID, -1, ClassFile.LOOKUPSWITCH);
+        def(_fast_binaryswitch, "fast_binaryswitch", "", null, T_VOID, -1, ClassFile.LOOKUPSWITCH);
+        def(_return_register_finalizer, "return_register_finalizer", "b", null, T_VOID, 0, ClassFile.RETURN);
+        def(_invokehandle, "invokehandle", "bJJ", null, T_ILLEGAL, -1, ClassFile.INVOKEVIRTUAL);
+        def(_fast_aldc, "fast_aldc", "bj", null, T_OBJECT, 1, ClassFile.LDC);
+        def(_fast_aldc_w, "fast_aldc_w", "bJJ", null, T_OBJECT, 1, ClassFile.LDC_W);
+        def(_nofast_getfield, "nofast_getfield", "bJJ", null, T_ILLEGAL, 0, ClassFile.GETFIELD);
+        def(_nofast_putfield, "nofast PUTFIELD", "bJJ", null, T_ILLEGAL, -2, ClassFile.PUTFIELD);
+        def(_nofast_aload_0, "nofast_aload_0", "b", null, T_ILLEGAL, 1, ClassFile.ALOAD_0);
+        def(_nofast_iload, "nofast_iload", "bi", null, T_ILLEGAL, 1, ClassFile.ILOAD);
+        def(_shouldnotreachhere, "_shouldnotreachhere", "b", null, T_VOID, 0);
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/classfile/impl/verifier/VerificationFrame$1.class b/tests/test_data/std/jdk/internal/classfile/impl/verifier/VerificationFrame$1.class
new file mode 100644
index 0000000000000000000000000000000000000000..1ae112e5f8b2e67e9edb9eb5bc519df5d96a0c74
GIT binary patch
literal 1456
zcmb_cTTc@~7(D}}OUoh^xrsNFm5UcDsK`yFEiF__*R*R5;Q^QJ01L}5+1+A%GtnPl
zqCdby6JJ%LF~;x%{6Rh%zu6SZgT`Rk?9Q2U^36AMX6D-;zrO7PNMSaLI@C)D$!I{B
zVP?I&5jSn0yS8q{4NLdD71QEzb92jzZ*$jNF}WKr1sy~8O~)>ptG4b}T&^T_&os2B
zTbv=hty>lDF=Ph@7js9Eb25TPL?lFIG(lz<J9N^Ft8a2;m_b#FPfXufo7cA#%A)Mq
zRrc*F!mhGsSNW&iy2WgS_VJjE7Q`4DwIwxqFP+jDGDl-xoKmZd6KG?Q9Jg%J=`hp}
z3}z*CFm$i$+j`v6?bUeRDOQZNjLEHX+I1aQtgB1LNwF?TTS^oPi3OpZl5tvS4cbyR
zuL<R>jB`Q>YfH%mEiI(;GA>l5)Lfz<Bt^!>YOdm(S_nq=%NP(^ghr}rE}h7W$V)OV
zS0ghyH4#K!l`$kV+MyZsVKNuYa!tmt5NYC^nx7S8ugkbml}c)MM#3mVtY%VOUgw5S
zX{HRzv`zm`uooqUP|7LO^=rwQHqTc!m$|Fy%N8lEImghglJ1&<SH<R{uNxb54XQj^
zbSkdFGj!n@Iu4$CaCe5p0w{UfHY~?8?bUhiuQ_E235L=CyN+Zb&pm(6@yLywwQcUE
zM9pzeLYiUX&{_AZkxpa39%DUJJ2$D`S*%M`kLZzd3uA=iL@d-(5BU5QZ1;O~2hu0;
zHh;nKkoq2>`vL7F+EAn2M8h?DhNx7dJwzL8w3le?Ky;tr2f_yhKM;RK@JMZZT<~a(
zj|kor@Q-9Ef;M!b9bM=}A7MX6$Z$JGk-!XL8V^t;)bJPvVHsQS2z@-mbHW#RiC2WL
z@dj@R-{Avx2<tIH+Y$~o=O-qqUq{~*edFkOBvHitADX<-{@Ngf+d-l`xJwwqG_}b<
XnWjH7&`Oik(XunsU35zH#2SAC?DJ*o

literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/classfile/impl/verifier/VerificationFrame.class b/tests/test_data/std/jdk/internal/classfile/impl/verifier/VerificationFrame.class
new file mode 100644
index 0000000000000000000000000000000000000000..cfded45a875bb4145ccdf86f786840605ea2fdcc
GIT binary patch
literal 12210
zcmbta3w%`7ng5^6OlC5<fsl|uNJ0h^UPB-nFd_j&5F|XU;UV}Khs;efFqw%n69KKS
z6%ln?`_SD6+ak1GcGXs-5~)^eUy81~b|1BF)velYeN_9f+wO```v1<ob7u@=f1QZl
zx%ZyOcfR-cKPUIuKRx;cfF<g3KZ@Y;!fn8VVukXp;j6<fv2eVnW$l)&W>;FFcz!e<
zO)pe%O`E=<1U{5_;WtnUL!oVJWLrx#o;H*5aIB>(7EYzQqcO83+Seazx!O!dyQ5~Z
zWrKd`3a6uq__AcU&s6Y+65ZV?ljK#0&>Ur8v=B5xu|!ummI|e!*O<~V#z2L1l!j92
zaMw1ceXN11-1fe3a+{1FXJEY5-WT3s6O;A{25P0<ACh)WOPcEqOqAy0P<Jfclai)@
zfk`++ShQGCn0x7}g5_Mdv)^nNa!m#%3%TO#qEih_!*qp`P)0=xvkO_mOm<Mg?Ox1K
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diff --git a/tests/test_data/std/jdk/internal/classfile/impl/verifier/VerificationFrame.java b/tests/test_data/std/jdk/internal/classfile/impl/verifier/VerificationFrame.java
new file mode 100644
index 00000000..13aac2c9
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/classfile/impl/verifier/VerificationFrame.java
@@ -0,0 +1,400 @@
+/*
+ * Copyright (c) 2022, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package jdk.internal.classfile.impl.verifier;
+
+import java.util.Arrays;
+
+/**
+ * @see <a href="https://raw.githubusercontent.com/openjdk/jdk/master/src/hotspot/share/classfile/stackMapFrame.hpp">hotspot/share/classfile/stackMapFrame.hpp</a>
+ * @see <a href="https://raw.githubusercontent.com/openjdk/jdk/master/src/hotspot/share/classfile/stackMapFrame.cpp">hotspot/share/classfile/stackMapFrame.cpp</a>
+ */
+class VerificationFrame {
+
+    public static final int FLAG_THIS_UNINIT = 0x01;
+
+    private int _offset;
+    private int _locals_size, _stack_size;
+    private int _stack_mark;
+    private final int _max_locals, _max_stack;
+    private int _flags;
+    private final VerificationType[] _locals, _stack;
+    private final VerifierImpl _verifier;
+
+    public VerificationFrame(int offset, int flags, int locals_size, int stack_size, int max_locals, int max_stack, VerificationType[] locals, VerificationType[] stack, VerifierImpl v) {
+        this._offset = offset;
+        this._locals_size = locals_size;
+        this._stack_size = stack_size;
+        this._stack_mark = -1;
+        this._max_locals = max_locals;
+        this._max_stack = max_stack;
+        this._flags = flags;
+        this._locals = locals;
+        this._stack = stack;
+        this._verifier = v;
+    }
+
+    @Override
+    public String toString() {
+        return "frame @" + _offset + " with locals " + (_locals == null ? "[]" : Arrays.asList(_locals)) + " and stack " + (_stack == null ? "[]" : Arrays.asList(_stack));
+    }
+
+    void set_offset(int offset) {
+        this._offset = offset;
+    }
+
+    void set_flags(int flags) {
+        _flags = flags;
+    }
+
+    void set_locals_size(int locals_size) {
+        _locals_size = locals_size;
+    }
+
+    void set_stack_size(int stack_size) {
+        _stack_size = _stack_mark = stack_size;
+    }
+
+    int offset() {
+        return _offset;
+    }
+
+    VerifierImpl verifier() {
+        return _verifier;
+    }
+
+    int flags() {
+        return _flags;
+    }
+
+    int locals_size() {
+        return _locals_size;
+    }
+
+    VerificationType[] locals() {
+        return _locals;
+    }
+
+    int stack_size() {
+        return _stack_size;
+    }
+
+    VerificationType[] stack() {
+        return _stack;
+    }
+
+    int max_locals() {
+        return _max_locals;
+    }
+
+    boolean flag_this_uninit() {
+        return (_flags & FLAG_THIS_UNINIT) == FLAG_THIS_UNINIT;
+    }
+
+    void reset() {
+        for (int i = 0; i < _max_locals; i++) {
+            _locals[i] = VerificationType.bogus_type;
+        }
+        for (int i = 0; i < _max_stack; i++) {
+            _stack[i] = VerificationType.bogus_type;
+        }
+    }
+
+    void set_mark() {
+        if (_stack_mark != -1) {
+            for (int i = _stack_mark - 1; i >= _stack_size; --i) {
+                _stack[i] = VerificationType.bogus_type;
+            }
+            _stack_mark = _stack_size;
+        }
+    }
+
+    void push_stack(VerificationType type) {
+        if (type.is_check()) _verifier.verifyError("Must be a real type");
+        if (_stack_size >= _max_stack) {
+            _verifier.verifyError("Operand stack overflow");
+        }
+        _stack[_stack_size++] = type;
+    }
+
+    void push_stack_2(VerificationType type1, VerificationType type2) {
+        if (!(type1.is_long() || type1.is_double())) _verifier.verifyError("must be long/double");
+        if (!(type2.is_long2() || type2.is_double2())) _verifier.verifyError("must be long/double_2");
+        if (_stack_size >= _max_stack - 1) {
+            _verifier.verifyError("Operand stack overflow");
+        }
+        _stack[_stack_size++] = type1;
+        _stack[_stack_size++] = type2;
+    }
+
+    VerificationType pop_stack() {
+        if (_stack_size <= 0) {
+            _verifier.verifyError("Operand stack underflow");
+        }
+        return _stack[--_stack_size];
+    }
+
+    VerificationType pop_stack(VerificationType type) {
+        if (_stack_size != 0) {
+            VerificationType top = _stack[_stack_size - 1];
+            boolean subtype = type.is_assignable_from(top, verifier());
+            if (subtype) {
+                --_stack_size;
+                return top;
+            }
+        }
+        return pop_stack_ex(type);
+    }
+
+    void pop_stack_2(VerificationType type1, VerificationType type2) {
+        if (!(type1.is_long2() || type1.is_double2())) _verifier.verifyError("must be long/double");
+        if (!(type2.is_long() || type2.is_double())) _verifier.verifyError("must be long/double_2");
+        if (_stack_size >= 2) {
+            VerificationType top1 = _stack[_stack_size - 1];
+            boolean subtype1 = type1.is_assignable_from(top1, verifier());
+            VerificationType top2 = _stack[_stack_size - 2];
+            boolean subtype2 = type2.is_assignable_from(top2, verifier());
+            if (subtype1 && subtype2) {
+                _stack_size -= 2;
+                return;
+            }
+        }
+        pop_stack_ex(type1);
+        pop_stack_ex(type2);
+    }
+
+    VerificationFrame(int max_locals, int max_stack, VerifierImpl verifier) {
+        _offset = 0;
+        _locals_size = 0;
+        _stack_size = 0;
+        _stack_mark = 0;
+        _max_locals = max_locals;
+        _max_stack = max_stack;
+        _flags = 0;
+        _verifier = verifier;
+        _locals = new VerificationType[max_locals];
+        _stack = new VerificationType[max_stack];
+        for (int i = 0; i < max_locals; i++) {
+            _locals[i] = VerificationType.bogus_type;
+        }
+        for (int i = 0; i < max_stack; i++) {
+            _stack[i] = VerificationType.bogus_type;
+        }
+    }
+
+    VerificationFrame frame_in_exception_handler(int flags) {
+        return new VerificationFrame(_offset, flags, _locals_size, 0,
+                _max_locals, _max_stack, _locals, new VerificationType[1],
+                _verifier);
+    }
+
+    void initialize_object(VerificationType old_object, VerificationType new_object) {
+        int i;
+        for (i = 0; i < _max_locals; i++) {
+            if (_locals[i].equals(old_object)) {
+                _locals[i] = new_object;
+            }
+        }
+        for (i = 0; i < _stack_size; i++) {
+            if (_stack[i].equals(old_object)) {
+                _stack[i] = new_object;
+            }
+        }
+        if (old_object.is_uninitialized_this(_verifier)) {
+            _flags = 0;
+        }
+    }
+
+    VerificationType  set_locals_from_arg(VerificationWrapper.MethodWrapper m, VerificationType thisKlass) {
+        var ss = new VerificationSignature(m.descriptor(), true, _verifier);
+        int init_local_num = 0;
+        if (!m.isStatic()) {
+            init_local_num++;
+            if (VerifierImpl.object_initializer_name.equals(m.name()) && !VerifierImpl.java_lang_Object.equals(thisKlass.name())) {
+                _locals[0] = VerificationType.uninitialized_this_type;
+                _flags |= FLAG_THIS_UNINIT;
+            } else {
+                _locals[0] = thisKlass;
+            }
+        }
+        while (!ss.atReturnType()) {
+            init_local_num += _verifier.change_sig_to_verificationType(ss, _locals, init_local_num);
+            ss.next();
+        }
+        _locals_size = init_local_num;
+        switch (ss.type()) {
+            case T_OBJECT:
+            case T_ARRAY:
+            {
+                String sig = ss.asSymbol();
+                return VerificationType.reference_type(sig);
+            }
+            case T_INT:         return VerificationType.integer_type;
+            case T_BYTE:        return VerificationType.byte_type;
+            case T_CHAR:        return VerificationType.char_type;
+            case T_SHORT:     return VerificationType.short_type;
+            case T_BOOLEAN: return VerificationType.boolean_type;
+            case T_FLOAT:     return VerificationType.float_type;
+            case T_DOUBLE:    return VerificationType.double_type;
+            case T_LONG:        return VerificationType.long_type;
+            case T_VOID:        return VerificationType.bogus_type;
+            default:
+                _verifier.verifyError("Should not reach here");
+                return VerificationType.bogus_type;
+        }
+    }
+
+    void copy_locals(VerificationFrame src) {
+        int len = src.locals_size() < _locals_size ? src.locals_size() : _locals_size;
+        if (len > 0) System.arraycopy(src.locals(), 0, _locals, 0, len);
+    }
+
+    void copy_stack(VerificationFrame src) {
+        int len = src.stack_size() < _stack_size ? src.stack_size() : _stack_size;
+        if (len > 0) System.arraycopy(src.stack(), 0, _stack, 0, len);
+    }
+
+    private int is_assignable_to(VerificationType[] from, VerificationType[] to, int len) {
+        int i = 0;
+        for (; i < len; i++) {
+            if (!to[i].is_assignable_from(from[i], verifier())) {
+                break;
+            }
+        }
+        return i;
+    }
+
+    boolean is_assignable_to(VerificationFrame target) {
+        if (_max_locals != target.max_locals()) {
+            _verifier.verifyError("Locals size mismatch", this, target);
+        }
+        if (_stack_size != target.stack_size()) {
+            _verifier.verifyError("Stack size mismatch", this, target);
+        }
+        int mismatch_loc;
+        mismatch_loc = is_assignable_to(_locals, target.locals(), target.locals_size());
+        if (mismatch_loc != target.locals_size()) {
+            _verifier.verifyError("Bad type", this, target);
+        }
+        mismatch_loc = is_assignable_to(_stack, target.stack(), _stack_size);
+        if (mismatch_loc != _stack_size) {
+            _verifier.verifyError("Bad type", this, target);
+        }
+
+        if ((_flags | target.flags()) == target.flags()) {
+            return true;
+        } else {
+            _verifier.verifyError("Bad flags", this, target);
+        }
+        return false;
+    }
+
+    VerificationType pop_stack_ex(VerificationType type) {
+        if (_stack_size <= 0) {
+            _verifier.verifyError("Operand stack underflow");
+        }
+        VerificationType top = _stack[--_stack_size];
+        boolean subtype = type.is_assignable_from(top, verifier());
+        if (!subtype) {
+            _verifier.verifyError("Bad type on operand stack");
+        }
+        return top;
+    }
+
+    VerificationType get_local(int index, VerificationType type) {
+        if (index >= _max_locals) {
+            _verifier.verifyError("Local variable table overflow");
+        }
+        boolean subtype = type.is_assignable_from(_locals[index],
+            verifier());
+        if (!subtype) {
+            _verifier.verifyError("Bad local variable type");
+        }
+        if(index >= _locals_size) { _locals_size = index + 1; }
+        return _locals[index];
+    }
+
+    void get_local_2(int index, VerificationType type1, VerificationType type2) {
+        if (!(type1.is_long() || type1.is_double())) _verifier.verifyError("must be long/double");
+        if (!(type2.is_long2() || type2.is_double2())) _verifier.verifyError("must be long/double_2");
+        if (index >= _locals_size - 1) {
+            _verifier.verifyError("get long/double overflows locals");
+        }
+        boolean subtype = type1.is_assignable_from(_locals[index], verifier());
+        if (!subtype) {
+            _verifier.verifyError("Bad local variable type");
+        } else {
+            subtype = type2.is_assignable_from(_locals[index + 1], verifier());
+            if (!subtype) {
+                _verifier.verifyError("Bad local variable type");
+            }
+        }
+    }
+
+    void set_local(int index, VerificationType type) {
+        if (type.is_check()) _verifier.verifyError("Must be a real type");
+        if (index >= _max_locals) {
+            _verifier.verifyError("Local variable table overflow");
+        }
+        if (_locals[index].is_double() || _locals[index].is_long()) {
+            if ((index + 1) >= _locals_size) _verifier.verifyError("Local variable table overflow");
+            _locals[index + 1] = VerificationType.bogus_type;
+        }
+        if (_locals[index].is_double2() || _locals[index].is_long2()) {
+            if (index < 1) _verifier.verifyError("Local variable table underflow");
+            _locals[index - 1] = VerificationType.bogus_type;
+        }
+        _locals[index] = type;
+        if (index >= _locals_size) {
+            for (int i=_locals_size; i<index; i++) {
+                if (_locals[i] != VerificationType.bogus_type) _verifier.verifyError("holes must be bogus type");
+            }
+            _locals_size = index + 1;
+        }
+    }
+
+    void set_local_2(int index, VerificationType type1, VerificationType type2) {
+        if (!(type1.is_long() || type1.is_double())) _verifier.verifyError("must be long/double");
+        if (!(type2.is_long2() || type2.is_double2())) _verifier.verifyError("must be long/double_2");
+        if (index >= _max_locals - 1) {
+            _verifier.verifyError("Local variable table overflow");
+        }
+        if (_locals[index+1].is_double() || _locals[index+1].is_long()) {
+            if ((index + 2) >= _locals_size) _verifier.verifyError("Local variable table overflow");
+            _locals[index + 2] = VerificationType.bogus_type;
+        }
+        if (_locals[index].is_double2() || _locals[index].is_long2()) {
+            if (index < 1) _verifier.verifyError("Local variable table underflow");
+            _locals[index - 1] = VerificationType.bogus_type;
+        }
+        _locals[index] = type1;
+        _locals[index+1] = type2;
+        if (index >= _locals_size - 1) {
+            for (int i=_locals_size; i<index; i++) {
+                if (_locals[i] != VerificationType.bogus_type) _verifier.verifyError("holes must be bogus type");
+            }
+            _locals_size = index + 2;
+        }
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/classfile/impl/verifier/VerificationSignature$BasicType.class b/tests/test_data/std/jdk/internal/classfile/impl/verifier/VerificationSignature$BasicType.class
new file mode 100644
index 0000000000000000000000000000000000000000..194e5225b3440dad3db0fa47bbb9ebcbfbf46803
GIT binary patch
literal 3215
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/classfile/impl/verifier/VerificationSignature.class b/tests/test_data/std/jdk/internal/classfile/impl/verifier/VerificationSignature.class
new file mode 100644
index 0000000000000000000000000000000000000000..21314aee3d54ec6f7811c895bafc7aeb813be114
GIT binary patch
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/classfile/impl/verifier/VerificationSignature.java b/tests/test_data/std/jdk/internal/classfile/impl/verifier/VerificationSignature.java
new file mode 100644
index 00000000..9fa4a377
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/classfile/impl/verifier/VerificationSignature.java
@@ -0,0 +1,319 @@
+/*
+ * Copyright (c) 2022, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package jdk.internal.classfile.impl.verifier;
+
+final class VerificationSignature {
+
+    enum BasicType {
+        T_BOOLEAN(4),
+        T_CHAR(5),
+        T_FLOAT(6),
+        T_DOUBLE(7),
+        T_BYTE(8),
+        T_SHORT(9),
+        T_INT(10),
+        T_LONG(11),
+        T_OBJECT(12),
+        T_ARRAY(13),
+        T_VOID(14),
+        T_ADDRESS(15),
+        T_NARROWOOP(16),
+        T_METADATA(17),
+        T_NARROWKLASS(18),
+        T_CONFLICT(19),
+        T_ILLEGAL(99);
+
+        final int type;
+
+        BasicType(int type) {
+            this.type = type;
+        }
+
+        static BasicType fromSignature(char ch) {
+            return switch (ch) {
+                case JVM_SIGNATURE_BOOLEAN ->
+                    T_BOOLEAN;
+                case JVM_SIGNATURE_CHAR ->
+                    T_CHAR;
+                case JVM_SIGNATURE_FLOAT ->
+                    T_FLOAT;
+                case JVM_SIGNATURE_DOUBLE ->
+                    T_DOUBLE;
+                case JVM_SIGNATURE_BYTE ->
+                    T_BYTE;
+                case JVM_SIGNATURE_SHORT ->
+                    T_SHORT;
+                case JVM_SIGNATURE_INT ->
+                    T_INT;
+                case JVM_SIGNATURE_LONG ->
+                    T_LONG;
+                case JVM_SIGNATURE_CLASS ->
+                    T_OBJECT;
+                case JVM_SIGNATURE_ARRAY ->
+                    T_ARRAY;
+                case JVM_SIGNATURE_VOID ->
+                    T_VOID;
+                default ->
+                    throw new IllegalArgumentException("Not a valid type: '" + ch + "'");
+            };
+        }
+    }
+
+    static final char JVM_SIGNATURE_DOT = '.',
+            JVM_SIGNATURE_ARRAY = '[',
+            JVM_SIGNATURE_BYTE = 'B',
+            JVM_SIGNATURE_CHAR = 'C',
+            JVM_SIGNATURE_CLASS = 'L',
+            JVM_SIGNATURE_ENDCLASS = ';',
+            JVM_SIGNATURE_FLOAT = 'F',
+            JVM_SIGNATURE_DOUBLE = 'D',
+            JVM_SIGNATURE_FUNC = '(',
+            JVM_SIGNATURE_ENDFUNC = ')',
+            JVM_SIGNATURE_INT = 'I',
+            JVM_SIGNATURE_LONG = 'J',
+            JVM_SIGNATURE_SHORT = 'S',
+            JVM_SIGNATURE_VOID = 'V',
+            JVM_SIGNATURE_BOOLEAN = 'Z';
+
+    static boolean isReferenceType(BasicType t) {
+        return t == BasicType.T_OBJECT || t == BasicType.T_ARRAY;
+    }
+
+    private static final char TYPE2CHAR_TAB[] = new char[]{
+        0, 0, 0, 0,
+        JVM_SIGNATURE_BOOLEAN, JVM_SIGNATURE_CHAR,
+        JVM_SIGNATURE_FLOAT, JVM_SIGNATURE_DOUBLE,
+        JVM_SIGNATURE_BYTE, JVM_SIGNATURE_SHORT,
+        JVM_SIGNATURE_INT, JVM_SIGNATURE_LONG,
+        JVM_SIGNATURE_CLASS, JVM_SIGNATURE_ARRAY,
+        JVM_SIGNATURE_VOID, 0,
+        0, 0, 0, 0
+    };
+
+    static boolean hasEnvelope(char signature_char) {
+        return signature_char == JVM_SIGNATURE_CLASS;
+    }
+
+    private BasicType type;
+    private final String signature;
+    private final int limit;
+    private int begin, end, arrayPrefix, state;
+
+    private static final int S_FIELD = 0, S_METHOD = 1, S_METHOD_RETURN = 3;
+
+    boolean atReturnType() {
+        return state == S_METHOD_RETURN;
+    }
+
+    boolean isReference() {
+        return isReferenceType(type);
+    }
+
+    BasicType type() {
+        return type;
+    }
+
+    private int rawSymbolBegin() {
+        return begin + (hasEnvelope() ? 1 : 0);
+    }
+
+    private int rawSymbolEnd() {
+        return end - (hasEnvelope() ? 1 : 0);
+    }
+
+    private boolean hasEnvelope() {
+        return hasEnvelope(signature.charAt(begin));
+    }
+
+    String asSymbol() {
+        int begin = rawSymbolBegin();
+        int end = rawSymbolEnd();
+        return signature.substring(begin, end);
+    }
+
+    int skipArrayPrefix(int max_skip_length) {
+        if (type != BasicType.T_ARRAY) {
+            return 0;
+        }
+        if (arrayPrefix > max_skip_length) {
+            // strip some but not all levels of T_ARRAY
+            arrayPrefix -= max_skip_length;
+            begin += max_skip_length;
+            return max_skip_length;
+        }
+        return skipWholeArrayPrefix();
+    }
+
+    static BasicType decodeSignatureChar(char ch) {
+        return BasicType.fromSignature(ch);
+    }
+
+    private final VerifierImpl context;
+
+    VerificationSignature(String signature, boolean is_method, VerifierImpl context) {
+        this.signature = signature;
+        this.limit = signature.length();
+        int oz = is_method ? S_METHOD : S_FIELD;
+        this.state = oz;
+        this.begin = this.end = oz;
+        this.arrayPrefix = 0;
+        this.context = context;
+        next();
+    }
+
+    private int scanType(BasicType type) {
+        int e = end;
+        int tem;
+        switch (type) {
+            case T_OBJECT:
+                tem = signature.indexOf(JVM_SIGNATURE_ENDCLASS, e);
+                return tem < 0 ? limit : tem + 1;
+            case T_ARRAY:
+                while (e < limit && signature.charAt(e) == JVM_SIGNATURE_ARRAY) {
+                    e++;
+                }
+                arrayPrefix = e - end;
+                if (hasEnvelope(signature.charAt(e))) {
+                    tem = signature.indexOf(JVM_SIGNATURE_ENDCLASS, e);
+                    return tem < 0 ? limit : tem + 1;
+                }
+                return e + 1;
+            default:
+                return e + 1;
+        }
+    }
+
+    void next() {
+        final String sig = signature;
+        int len = limit;
+        testLen(len);
+        begin = end;
+        char ch = sig.charAt(begin);
+        if (ch == JVM_SIGNATURE_ENDFUNC) {
+            state = S_METHOD_RETURN;
+            begin = ++end;
+            testLen(len);
+            ch = sig.charAt(begin);
+        }
+        try {
+            BasicType bt = decodeSignatureChar(ch);
+            type = bt;
+            end = scanType(bt);
+        } catch (IllegalArgumentException iae) {
+            throw new IllegalArgumentException("Not a valid signature: '" + signature + "'", iae);
+        }
+    }
+
+    private void testLen(int len) {
+        if (end >= len) {
+            if (context == null) {
+                throw new IllegalArgumentException("Invalid signature " + signature);
+            } else {
+                context.verifyError("Invalid signature " + signature);
+            }
+        }
+    }
+
+    int skipWholeArrayPrefix() {
+        int whole_array_prefix = arrayPrefix;
+        int new_begin = begin + whole_array_prefix;
+        begin = new_begin;
+        char ch = signature.charAt(new_begin);
+        BasicType bt = decodeSignatureChar(ch);
+        type = bt;
+        return whole_array_prefix;
+    }
+
+    @SuppressWarnings("fallthrough")
+    static int isValidType(String type, int limit) {
+        int index = 0;
+
+        // Iterate over any number of array dimensions
+        while (index < limit && type.charAt(index) == JVM_SIGNATURE_ARRAY) {
+            ++index;
+        }
+        if (index >= limit) {
+            return -1;
+        }
+        switch (type.charAt(index)) {
+            case JVM_SIGNATURE_BYTE:
+            case JVM_SIGNATURE_CHAR:
+            case JVM_SIGNATURE_FLOAT:
+            case JVM_SIGNATURE_DOUBLE:
+            case JVM_SIGNATURE_INT:
+            case JVM_SIGNATURE_LONG:
+            case JVM_SIGNATURE_SHORT:
+            case JVM_SIGNATURE_BOOLEAN:
+            case JVM_SIGNATURE_VOID:
+                return index + 1;
+            case JVM_SIGNATURE_CLASS:
+                for (index = index + 1; index < limit; ++index) {
+                    char c = type.charAt(index);
+                    switch (c) {
+                        case JVM_SIGNATURE_ENDCLASS:
+                            return index + 1;
+                        case '\0':
+                        case JVM_SIGNATURE_DOT:
+                        case JVM_SIGNATURE_ARRAY:
+                            return -1;
+                        default: ; // fall through
+                        }
+                }
+            // fall through
+            default: ; // fall through
+            }
+        return -1;
+    }
+
+    static boolean isValidMethodSignature(String method_sig) {
+        if (method_sig != null) {
+            int len = method_sig.length();
+            int index = 0;
+            if (len > 1 && method_sig.charAt(index) == JVM_SIGNATURE_FUNC) {
+                ++index;
+                while (index < len && method_sig.charAt(index) != JVM_SIGNATURE_ENDFUNC) {
+                    int res = isValidType(method_sig.substring(index), len - index);
+                    if (res == -1) {
+                        return false;
+                    } else {
+                        index += res;
+                    }
+                }
+                if (index < len && method_sig.charAt(index) == JVM_SIGNATURE_ENDFUNC) {
+                    // check the return type
+                    ++index;
+                    return (isValidType(method_sig.substring(index), len - index) == (len - index));
+                }
+            }
+        }
+        return false;
+    }
+
+    static boolean isValidTypeSignature(String sig) {
+        if (sig == null) return false;
+        int len = sig.length();
+        return (len >= 1 && (isValidType(sig, len) == len));
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/classfile/impl/verifier/VerificationTable$StackMapReader.class b/tests/test_data/std/jdk/internal/classfile/impl/verifier/VerificationTable$StackMapReader.class
new file mode 100644
index 0000000000000000000000000000000000000000..1cec8a2e9ac774758a4a623e8b8a3aec065b1967
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HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/classfile/impl/verifier/VerificationTable$StackMapStream.class b/tests/test_data/std/jdk/internal/classfile/impl/verifier/VerificationTable$StackMapStream.class
new file mode 100644
index 0000000000000000000000000000000000000000..b599486c04a06e3df165f55a4f753aada6806fff
GIT binary patch
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diff --git a/tests/test_data/std/jdk/internal/classfile/impl/verifier/VerificationTable.class b/tests/test_data/std/jdk/internal/classfile/impl/verifier/VerificationTable.class
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diff --git a/tests/test_data/std/jdk/internal/classfile/impl/verifier/VerificationTable.java b/tests/test_data/std/jdk/internal/classfile/impl/verifier/VerificationTable.java
new file mode 100644
index 00000000..db07e0aa
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/classfile/impl/verifier/VerificationTable.java
@@ -0,0 +1,411 @@
+/*
+ * Copyright (c) 2022, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package jdk.internal.classfile.impl.verifier;
+
+import static jdk.internal.classfile.impl.verifier.VerificationType.*;
+
+/**
+ * @see <a href="https://raw.githubusercontent.com/openjdk/jdk/master/src/hotspot/share/classfile/stackMapTable.hpp">hotspot/share/classfile/stackMapTable.hpp</a>
+ * @see <a href="https://raw.githubusercontent.com/openjdk/jdk/master/src/hotspot/share/classfile/stackMapTable.cpp">hotspot/share/classfile/stackMapTable.cpp</a>
+ */
+class VerificationTable {
+
+    private final int _code_length;
+    private final int _frame_count;
+    private final VerificationFrame[] _frame_array;
+    private final VerifierImpl _verifier;
+
+    int get_frame_count() {
+        return _frame_count;
+    }
+
+    int get_offset(int index) {
+        return _frame_array[index].offset();
+    }
+
+    static class StackMapStream {
+
+        private final byte[] _data;
+        private int _index;
+        private final VerifierImpl _verifier;
+
+        StackMapStream(byte[] ah, VerifierImpl context) {
+            _data = ah;
+            _index = 0;
+            _verifier = context;
+        }
+
+        int get_u1() {
+            if (_data == null || _index >= _data.length) {
+                _verifier.classError("access beyond the end of attribute");
+            }
+            return _data[_index++] & 0xff;
+        }
+
+        int get_u2() {
+            int res = get_u1() << 8;
+            return res | get_u1();
+        }
+
+        boolean at_end() {
+            return (_data == null) || (_index == _data.length);
+        }
+    }
+
+    VerificationTable(byte[] stackmap_data, VerificationFrame init_frame, int max_locals, int max_stack, byte[] code_data, int code_len,
+            VerificationWrapper.ConstantPoolWrapper cp, VerifierImpl v) {
+        _verifier = v;
+        var reader = new StackMapReader(stackmap_data, code_data, code_len, cp, v);
+        _code_length = code_len;
+        _frame_count = reader.get_frame_count();
+        _frame_array = new VerificationFrame[_frame_count];
+        if (_frame_count > 0) {
+            VerificationFrame pre_frame = init_frame;
+            for (int i = 0; i < _frame_count; i++) {
+                VerificationFrame frame = reader.next(pre_frame, i == 0, max_locals, max_stack);
+                _frame_array[i] = frame;
+                int offset = frame.offset();
+                if (offset >= code_len || code_data[offset] == 0) {
+                    _verifier.verifyError("StackMapTable error: bad offset");
+                }
+                pre_frame = frame;
+            }
+        }
+        reader.check_end();
+    }
+
+    int get_index_from_offset(int offset) {
+        int i = 0;
+        for (; i < _frame_count; i++) {
+            if (_frame_array[i].offset() == offset) {
+                return i;
+            }
+        }
+        return i;
+    }
+
+    boolean match_stackmap(VerificationFrame frame, int target, boolean match, boolean update) {
+        int index = get_index_from_offset(target);
+        return match_stackmap(frame, target, index, match, update);
+    }
+
+    boolean match_stackmap(VerificationFrame frame, int target, int frame_index, boolean match, boolean update) {
+        if (frame_index < 0 || frame_index >= _frame_count) {
+            _verifier.verifyError(String.format("Expecting a stackmap frame at branch target %d", target));
+        }
+        VerificationFrame stackmap_frame = _frame_array[frame_index];
+        boolean result = true;
+        if (match) {
+            result = frame.is_assignable_to(stackmap_frame);
+        }
+        if (update) {
+            int lsize = stackmap_frame.locals_size();
+            int ssize = stackmap_frame.stack_size();
+            if (frame.locals_size() > lsize || frame.stack_size() > ssize) {
+                frame.reset();
+            }
+            frame.set_locals_size(lsize);
+            frame.copy_locals(stackmap_frame);
+            frame.set_stack_size(ssize);
+            frame.copy_stack(stackmap_frame);
+            frame.set_flags(stackmap_frame.flags());
+        }
+        return result;
+    }
+
+    void check_jump_target(VerificationFrame frame, int target) {
+        boolean match = match_stackmap(frame, target, true, false);
+        if (!match || (target < 0 || target >= _code_length)) {
+            _verifier.verifyError(String.format("Inconsistent stackmap frames at branch target %d", target));
+        }
+    }
+
+    static class StackMapReader {
+
+        private final VerificationWrapper.ConstantPoolWrapper _cp;
+        private final StackMapStream _stream;
+        private final byte[] _code_data;
+        private final int _code_length;
+        private final int _frame_count;
+
+        void check_verification_type_array_size(int size, int max_size) {
+            if (size < 0 || size > max_size) {
+                _verifier.classError("StackMapTable format error: bad type array size");
+            }
+        }
+
+        private static final int
+                        SAME_LOCALS_1_STACK_ITEM_EXTENDED = 247,
+                        SAME_EXTENDED = 251,
+                        FULL = 255;
+
+        public int get_frame_count() {
+            return _frame_count;
+        }
+
+        public void check_end() {
+            if (!_stream.at_end()) {
+                _verifier.classError("wrong attribute size");
+            }
+        }
+
+        private final VerifierImpl _verifier;
+
+        public StackMapReader(byte[] stackmapData, byte[] code_data, int code_len, VerificationWrapper.ConstantPoolWrapper cp, VerifierImpl context) {
+            this._verifier = context;
+            _stream = new StackMapStream(stackmapData, _verifier);
+            if (stackmapData != null) {
+                _frame_count = _stream.get_u2();
+            } else {
+                _frame_count = 0;
+            }
+            _code_data = code_data;
+            _code_length = code_len;
+            _cp = cp;
+        }
+
+        int chop(VerificationType[] locals, int length, int chops) {
+            if (locals == null) return -1;
+            int pos = length - 1;
+            for (int i=0; i<chops; i++) {
+                if (locals[pos].is_category2_2nd()) {
+                    pos -= 2;
+                } else {
+                    pos--;
+                }
+                if (pos<0 && i<(chops-1)) return -1;
+            }
+            return pos+1;
+        }
+
+        VerificationType parse_verification_type(int[] flags) {
+            int tag = _stream.get_u1();
+            if (tag < ITEM_UninitializedThis) {
+                return VerificationType.from_tag(tag, _verifier);
+            }
+            if (tag == ITEM_Object) {
+                int class_index = _stream.get_u2();
+                int nconstants = _cp.entryCount();
+                if (class_index <= 0 || class_index >= nconstants || _cp.tagAt(class_index) != VerifierImpl.JVM_CONSTANT_Class) {
+                    _verifier.classError("bad class index");
+                }
+                return VerificationType.reference_type(_cp.classNameAt(class_index));
+            }
+            if (tag == ITEM_UninitializedThis) {
+                if (flags != null) {
+                    flags[0] |= VerificationFrame.FLAG_THIS_UNINIT;
+                }
+                return VerificationType.uninitialized_this_type;
+            }
+            if (tag == ITEM_Uninitialized) {
+                int offset = _stream.get_u2();
+                if (offset >= _code_length || _code_data[offset] != VerifierImpl.NEW_OFFSET) {
+                    _verifier.classError("StackMapTable format error: bad offset for Uninitialized");
+                }
+                return VerificationType.uninitialized_type(offset);
+            }
+            _verifier.classError("bad verification type");
+            return VerificationType.bogus_type;
+        }
+
+        public VerificationFrame next(VerificationFrame pre_frame, boolean first, int max_locals, int max_stack) {
+            VerificationFrame frame;
+            int offset;
+            VerificationType[] locals = null;
+            int frame_type = _stream.get_u1();
+            if (frame_type < 64) {
+                if (first) {
+                    offset = frame_type;
+                    if (pre_frame.locals_size() > 0) {
+                        locals = new VerificationType[pre_frame.locals_size()];
+                    }
+                } else {
+                    offset = pre_frame.offset() + frame_type + 1;
+                    locals = pre_frame.locals();
+                }
+                frame = new VerificationFrame(offset, pre_frame.flags(), pre_frame.locals_size(), 0, max_locals, max_stack, locals, null, _verifier);
+                if (first && locals != null) {
+                    frame.copy_locals(pre_frame);
+                }
+                return frame;
+            }
+            if (frame_type < 128) {
+                if (first) {
+                    offset = frame_type - 64;
+                    if (pre_frame.locals_size() > 0) {
+                        locals = new VerificationType[pre_frame.locals_size()];
+                    }
+                } else {
+                    offset = pre_frame.offset() + frame_type - 63;
+                    locals = pre_frame.locals();
+                }
+                VerificationType[] stack = new VerificationType[2];
+                int stack_size = 1;
+                stack[0] = parse_verification_type(null);
+                if (stack[0].is_category2()) {
+                    stack[1] = stack[0].to_category2_2nd(_verifier);
+                    stack_size = 2;
+                }
+                check_verification_type_array_size(stack_size, max_stack);
+                frame = new VerificationFrame(offset, pre_frame.flags(), pre_frame.locals_size(), stack_size, max_locals, max_stack, locals, stack, _verifier);
+                if (first && locals != null) {
+                    frame.copy_locals(pre_frame);
+                }
+                return frame;
+            }
+            int offset_delta = _stream.get_u2();
+            if (frame_type < SAME_LOCALS_1_STACK_ITEM_EXTENDED) {
+                _verifier.classError("reserved frame type");
+            }
+            if (frame_type == SAME_LOCALS_1_STACK_ITEM_EXTENDED) {
+                if (first) {
+                    offset = offset_delta;
+                    if (pre_frame.locals_size() > 0) {
+                        locals = new VerificationType[pre_frame.locals_size()];
+                    }
+                } else {
+                    offset = pre_frame.offset() + offset_delta + 1;
+                    locals = pre_frame.locals();
+                }
+                VerificationType[] stack = new VerificationType[2];
+                int stack_size = 1;
+                stack[0] = parse_verification_type(null);
+                if (stack[0].is_category2()) {
+                    stack[1] = stack[0].to_category2_2nd(_verifier);
+                    stack_size = 2;
+                }
+                check_verification_type_array_size(stack_size, max_stack);
+                frame = new VerificationFrame(offset, pre_frame.flags(), pre_frame.locals_size(), stack_size, max_locals, max_stack, locals, stack, _verifier);
+                if (first && locals != null) {
+                    frame.copy_locals(pre_frame);
+                }
+                return frame;
+            }
+            if (frame_type <= SAME_EXTENDED) {
+                locals = pre_frame.locals();
+                int length = pre_frame.locals_size();
+                int chops = SAME_EXTENDED - frame_type;
+                int new_length = length;
+                int flags = pre_frame.flags();
+                if (chops != 0) {
+                    new_length = chop(locals, length, chops);
+                    check_verification_type_array_size(new_length, max_locals);
+                    flags = 0;
+                    for (int i=0; i<new_length; i++) {
+                        if (locals[i].is_uninitialized_this(_verifier)) {
+                            flags |= VerificationFrame.FLAG_THIS_UNINIT;
+                            break;
+                        }
+                    }
+                }
+                if (first) {
+                    offset = offset_delta;
+                    if (new_length > 0) {
+                        locals = new VerificationType[new_length];
+                    } else {
+                        locals = null;
+                    }
+                } else {
+                    offset = pre_frame.offset() + offset_delta + 1;
+                }
+                frame = new VerificationFrame(offset, flags, new_length, 0, max_locals, max_stack, locals, null, _verifier);
+                if (first && locals != null) {
+                    frame.copy_locals(pre_frame);
+                }
+                return frame;
+            } else if (frame_type < SAME_EXTENDED + 4) {
+                int appends = frame_type - SAME_EXTENDED;
+                int real_length = pre_frame.locals_size();
+                int new_length = real_length + appends*2;
+                locals = new VerificationType[new_length];
+                VerificationType[] pre_locals = pre_frame.locals();
+                int i;
+                for (i=0; i<pre_frame.locals_size(); i++) {
+                    locals[i] = pre_locals[i];
+                }
+                int[] flags = new int[]{pre_frame.flags()};
+                for (i=0; i<appends; i++) {
+                    locals[real_length] = parse_verification_type(flags);
+                    if (locals[real_length].is_category2()) {
+                        locals[real_length + 1] = locals[real_length].to_category2_2nd(_verifier);
+                        ++real_length;
+                    }
+                    ++real_length;
+                }
+                check_verification_type_array_size(real_length, max_locals);
+                if (first) {
+                    offset = offset_delta;
+                } else {
+                    offset = pre_frame.offset() + offset_delta + 1;
+                }
+                frame = new VerificationFrame(offset, flags[0], real_length, 0, max_locals, max_stack, locals, null, _verifier);
+                return frame;
+            }
+            if (frame_type == FULL) {
+                int flags[] = new int[]{0};
+                int locals_size = _stream.get_u2();
+                int real_locals_size = 0;
+                if (locals_size > 0) {
+                    locals = new VerificationType[locals_size*2];
+                }
+                int i;
+                for (i=0; i<locals_size; i++) {
+                    locals[real_locals_size] = parse_verification_type(flags);
+                    if (locals[real_locals_size].is_category2()) {
+                        locals[real_locals_size + 1] =
+                            locals[real_locals_size].to_category2_2nd(_verifier);
+                        ++real_locals_size;
+                    }
+                    ++real_locals_size;
+                }
+                check_verification_type_array_size(real_locals_size, max_locals);
+                int stack_size = _stream.get_u2();
+                int real_stack_size = 0;
+                VerificationType[] stack = null;
+                if (stack_size > 0) {
+                    stack = new VerificationType[stack_size*2];
+                }
+                for (i=0; i<stack_size; i++) {
+                    stack[real_stack_size] = parse_verification_type(null);
+                    if (stack[real_stack_size].is_category2()) {
+                        stack[real_stack_size + 1] = stack[real_stack_size].to_category2_2nd(_verifier);
+                        ++real_stack_size;
+                    }
+                    ++real_stack_size;
+                }
+                check_verification_type_array_size(real_stack_size, max_stack);
+                if (first) {
+                    offset = offset_delta;
+                } else {
+                    offset = pre_frame.offset() + offset_delta + 1;
+                }
+                frame = new VerificationFrame(offset, flags[0], real_locals_size, real_stack_size, max_locals, max_stack, locals, stack, _verifier);
+                return frame;
+            }
+            _verifier.classError("reserved frame type");
+            return null;
+        }
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/classfile/impl/verifier/VerificationType$1.class b/tests/test_data/std/jdk/internal/classfile/impl/verifier/VerificationType$1.class
new file mode 100644
index 0000000000000000000000000000000000000000..b4d6e35d0d3d7958878efa8fe779ebbb6b014b01
GIT binary patch
literal 1405
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t2^6vPm!ZV9zYPds#?LW}Il>U;X?)--^H?D4ru+dqYi1!qg`g)M`2*ESTZRAt

literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/classfile/impl/verifier/VerificationType.class b/tests/test_data/std/jdk/internal/classfile/impl/verifier/VerificationType.class
new file mode 100644
index 0000000000000000000000000000000000000000..94398480db463c60c70ef22f954cc5b94cdc3898
GIT binary patch
literal 13089
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/classfile/impl/verifier/VerificationType.java b/tests/test_data/std/jdk/internal/classfile/impl/verifier/VerificationType.java
new file mode 100644
index 00000000..a2ecda88
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/classfile/impl/verifier/VerificationType.java
@@ -0,0 +1,438 @@
+/*
+ * Copyright (c) 2022, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package jdk.internal.classfile.impl.verifier;
+
+import java.lang.reflect.Field;
+import java.lang.reflect.Modifier;
+import java.util.IdentityHashMap;
+import java.util.Map;
+import java.util.Objects;
+import jdk.internal.classfile.impl.ClassHierarchyImpl;
+import jdk.internal.classfile.impl.Util;
+import static jdk.internal.classfile.impl.verifier.VerifierImpl.*;
+import static jdk.internal.classfile.impl.verifier.VerificationSignature.BasicType.*;
+
+/**
+ * @see <a href="https://raw.githubusercontent.com/openjdk/jdk/master/src/hotspot/share/classfile/verificationType.hpp">hotspot/share/classfile/verificationType.hpp</a>
+ * @see <a href="https://raw.githubusercontent.com/openjdk/jdk/master/src/hotspot/share/classfile/verificationType.cpp">hotspot/share/classfile/verificationType.cpp</a>
+ */
+class VerificationType {
+
+    private static final int BitsPerByte = 8;
+
+    static final int
+            ITEM_Top = 0,
+            ITEM_Integer = 1,
+            ITEM_Float = 2,
+            ITEM_Double = 3,
+            ITEM_Long = 4,
+            ITEM_Null = 5,
+            ITEM_UninitializedThis = 6,
+            ITEM_Object = 7,
+            ITEM_Uninitialized = 8,
+            ITEM_Bogus = -1;
+
+    VerificationType(String sym) {
+        _data = 0x100;
+        _sym = sym;
+    }
+    public VerificationType(int data, String sym) {
+        _data = data;
+        _sym = sym;
+    }
+    private final int _data;
+    private final String _sym;
+
+    @Override
+    public int hashCode() {
+        return _sym == null ? _data : _sym.hashCode();
+    }
+
+    @Override
+    public boolean equals(Object obj) {
+        return obj instanceof VerificationType ? (_data == ((VerificationType)obj)._data) && Objects.equals(_sym, ((VerificationType)obj)._sym) : false;
+    }
+
+    private static final Map<VerificationType, String> _constantsMap = new IdentityHashMap<>(18);
+
+    @Override
+    public String toString() {
+        if (_constantsMap.isEmpty()) {
+            for (Field f : VerificationType.class.getDeclaredFields()) {
+                if (Modifier.isStatic(f.getModifiers()) && f.getType() == VerificationType.class) try {
+                    _constantsMap.put((VerificationType)f.get(null), f.getName());
+                } catch (IllegalAccessException ignore) {}
+            }
+        }
+        if (_sym != null) return _sym;
+        if ((_data & 0xff) == Uninitialized) return "uninit@" + (_data >> 8);
+        return _constantsMap.getOrDefault(this, java.lang.Integer.toHexString(_data));
+    }
+
+    String name() {
+        return _sym;
+    }
+    private static final int
+            ITEM_Boolean = 9, ITEM_Byte = 10, ITEM_Short = 11, ITEM_Char = 12,
+            ITEM_Long_2nd = 13, ITEM_Double_2nd = 14;
+
+    private static final int
+                            TypeMask                     = 0x00000003,
+                            // Topmost types encoding
+                            Reference                    = 0x0,                // _sym contains the name
+                            Primitive                    = 0x1,                // see below for primitive list
+                            Uninitialized            = 0x2,                // 0x00ffff00 contains bci
+                            TypeQuery                    = 0x3,                // Meta-types used for category testing
+                            // Utility flags
+                            ReferenceFlag            = 0x00,             // For reference query types
+                            Category1Flag            = 0x01,             // One-word values
+                            Category2Flag            = 0x02,             // First word of a two-word value
+                            Category2_2ndFlag    = 0x04,             // Second word of a two-word value
+                            // special reference values
+                            Null                             = 0x00000000, // A reference with a 0 sym is null
+                            // Primitives categories (the second byte determines the category)
+                            Category1                    = (Category1Flag         << BitsPerByte) | Primitive,
+                            Category2                    = (Category2Flag         << BitsPerByte) | Primitive,
+                            Category2_2nd            = (Category2_2ndFlag << BitsPerByte) | Primitive,
+                            // Primitive values (type discriminator stored in most-significant bytes)
+                            // Bogus needs the " | Primitive".    Else, isReference(Bogus) returns TRUE.
+                            Bogus                            = (ITEM_Bogus            << 2 * BitsPerByte) | Primitive,
+                            Boolean                        = (ITEM_Boolean        << 2 * BitsPerByte) | Category1,
+                            Byte                             = (ITEM_Byte             << 2 * BitsPerByte) | Category1,
+                            Short                            = (ITEM_Short            << 2 * BitsPerByte) | Category1,
+                            Char                             = (ITEM_Char             << 2 * BitsPerByte) | Category1,
+                            Integer                        = (ITEM_Integer        << 2 * BitsPerByte) | Category1,
+                            Float                            = (ITEM_Float            << 2 * BitsPerByte) | Category1,
+                            Long                             = (ITEM_Long             << 2 * BitsPerByte) | Category2,
+                            Double                         = (ITEM_Double         << 2 * BitsPerByte) | Category2,
+                            Long_2nd                     = (ITEM_Long_2nd     << 2 * BitsPerByte) | Category2_2nd,
+                            Double_2nd                 = (ITEM_Double_2nd << 2 * BitsPerByte) | Category2_2nd,
+                            // Used by Uninitialized (second and third bytes hold the bci)
+                            BciMask                        = 0xffff << BitsPerByte,
+                            // A bci of -1 is an Uninitialized-This
+                            BciForThis = 0xffff,
+                            // Query values
+                            ReferenceQuery         = (ReferenceFlag         << BitsPerByte) | TypeQuery,
+                            Category1Query         = (Category1Flag         << BitsPerByte) | TypeQuery,
+                            Category2Query         = (Category2Flag         << BitsPerByte) | TypeQuery,
+                            Category2_2ndQuery = (Category2_2ndFlag << BitsPerByte) | TypeQuery;
+
+    VerificationType(int raw_data) {
+        this._data = raw_data;
+        this._sym = null;
+    }
+
+    static final VerificationType bogus_type = new VerificationType(Bogus),
+            null_type = new VerificationType(Null),
+            integer_type = new VerificationType(Integer),
+            float_type = new VerificationType(Float),
+            long_type = new VerificationType(Long),
+            long2_type = new VerificationType(Long_2nd),
+            double_type = new VerificationType(Double),
+            boolean_type = new VerificationType(Boolean),
+            byte_type = new VerificationType(Byte),
+            char_type = new VerificationType(Char),
+            short_type = new VerificationType(Short),
+            double2_type = new VerificationType(Double_2nd),
+            // "check" types are used for queries.    A "check" type is not assignable
+            // to anything, but the specified types are assignable to a "check".    For
+            // example, any category1 primitive is assignable to category1_check and
+            // any reference is assignable to reference_check.
+            reference_check = new VerificationType(ReferenceQuery),
+            category1_check = new VerificationType(Category1Query),
+            category2_check = new VerificationType(Category2Query);
+
+    static VerificationType reference_type(String sh) {
+        return new VerificationType(sh);
+    }
+
+    static VerificationType uninitialized_type(int bci) {
+        return new VerificationType(bci << 1 * BitsPerByte | Uninitialized);
+    }
+
+    static final VerificationType uninitialized_this_type = uninitialized_type(BciForThis);
+
+    boolean is_bogus() {
+        return (_data == Bogus);
+    }
+
+    boolean is_null() {
+        return (_data == Null);
+    }
+
+    boolean is_integer() {
+        return (_data == Integer);
+    }
+
+    boolean is_long() {
+        return (_data == Long);
+    }
+
+    boolean is_double() {
+        return (_data == Double);
+    }
+
+    boolean is_long2() {
+        return (_data == Long_2nd );
+    }
+
+    boolean is_double2() {
+        return (_data == Double_2nd);
+    }
+
+    boolean is_reference() {
+        return ((_data & TypeMask) == Reference);
+    }
+
+    boolean is_category1(VerifierImpl context) {
+        // This should return true for all one-word types, which are category1
+        // primitives, and references (including uninitialized refs).    Though
+        // the 'query' types should technically return 'false' here, if we
+        // allow this to return true, we can perform the test using only
+        // 2 operations rather than 8 (3 masks, 3 compares and 2 logical 'ands').
+        // Since no one should call this on a query type anyway, this is ok.
+        if(is_check()) context.verifyError("Must not be a check type (wrong value returned)");
+        // should only return false if it's a primitive, and the category1 flag
+        // is not set.
+        return ((_data & Category1) != Primitive);
+    }
+
+    boolean is_category2() {
+        return ((_data & Category2) == Category2);
+    }
+
+    boolean is_category2_2nd() {
+        return ((_data & Category2_2nd) == Category2_2nd);
+    }
+
+    boolean is_check() {
+        return (_data & TypeQuery) == TypeQuery;
+    }
+
+    boolean is_x_array(char sig) {
+        return is_null() || (is_array() &&(name().charAt(1) == sig));
+    }
+
+    boolean is_int_array() {
+        return is_x_array(JVM_SIGNATURE_INT);
+    }
+
+    boolean is_byte_array() {
+        return is_x_array(JVM_SIGNATURE_BYTE);
+    }
+
+    boolean is_bool_array() {
+        return is_x_array(JVM_SIGNATURE_BOOLEAN);
+    }
+
+    boolean is_char_array() {
+        return is_x_array(JVM_SIGNATURE_CHAR);
+    }
+
+    boolean is_short_array() {
+        return is_x_array(JVM_SIGNATURE_SHORT);
+    }
+
+    boolean is_long_array() {
+        return is_x_array(JVM_SIGNATURE_LONG);
+    }
+
+    boolean is_float_array() {
+        return is_x_array(JVM_SIGNATURE_FLOAT);
+    }
+
+    boolean is_double_array() {
+        return is_x_array(JVM_SIGNATURE_DOUBLE);
+    }
+
+    boolean is_object_array() {
+        return is_x_array(JVM_SIGNATURE_CLASS);
+    }
+
+    boolean is_array_array() {
+        return is_x_array(JVM_SIGNATURE_ARRAY);
+    }
+
+    boolean is_reference_array() {
+        return is_object_array() || is_array_array();
+    }
+
+    boolean is_object() {
+        return (is_reference() && !is_null() && name().length() >= 1 && name().charAt(0) != JVM_SIGNATURE_ARRAY);
+    }
+
+    boolean is_array() {
+        return (is_reference() && !is_null() && name().length() >= 2 && name().charAt(0) == JVM_SIGNATURE_ARRAY);
+    }
+
+    boolean is_uninitialized() {
+        return ((_data & Uninitialized) == Uninitialized);
+    }
+
+    boolean is_uninitialized_this(VerifierImpl context) {
+        return is_uninitialized() && bci(context) == BciForThis;
+    }
+
+    VerificationType to_category2_2nd(VerifierImpl context) {
+        if (!(is_category2())) context.verifyError("Must be a double word");
+        return is_long() ? long2_type : double2_type;
+    }
+
+    int bci(VerifierImpl context) {
+        if (!(is_uninitialized())) context.verifyError("Must be uninitialized type");
+        return ((_data & BciMask) >> 1 * BitsPerByte);
+    }
+
+    boolean is_assignable_from(VerificationType from, VerifierImpl context) {
+        boolean ret = _is_assignable_from(from, context);
+        context.errorContext = ret ? "" : String.format("(%s is not assignable from %s)", this, from);
+        return ret;
+    }
+
+    private boolean _is_assignable_from(VerificationType from, VerifierImpl context) {
+        if (equals(from) || is_bogus()) {
+            return true;
+        } else {
+            switch(_data) {
+                case Category1Query:
+                    return from.is_category1(context);
+                case Category2Query:
+                    return from.is_category2();
+                case Category2_2ndQuery:
+                    return from.is_category2_2nd();
+                case ReferenceQuery:
+                    return from.is_reference() || from.is_uninitialized();
+                case Boolean:
+                case Byte:
+                case Char:
+                case Short:
+                    return from.is_integer();
+                default:
+                    if (is_reference() && from.is_reference()) {
+                        return is_reference_assignable_from(from, context);
+                    } else {
+                        return false;
+                    }
+            }
+        }
+    }
+
+    // Check to see if one array component type is assignable to another.
+    // Same as is_assignable_from() except int primitives must be identical.
+    boolean is_component_assignable_from(VerificationType from, VerifierImpl context) {
+        if (equals(from) || is_bogus()) {
+            return true;
+        } else {
+            switch (_data) {
+                case Boolean:
+                case Byte:
+                case Char:
+                case Short:
+                    return false;
+                default:
+                    return is_assignable_from(from, context);
+            }
+        }
+    }
+
+    int dimensions(VerifierImpl context) {
+        if (!(is_array())) context.verifyError("Must be an array");
+        int index = 0;
+        while (name().charAt(index) == JVM_SIGNATURE_ARRAY) index++;
+        return index;
+    }
+
+    static VerificationType from_tag(int tag, VerifierImpl context) {
+        switch (tag) {
+            case ITEM_Top:         return bogus_type;
+            case ITEM_Integer: return integer_type;
+            case ITEM_Float:     return float_type;
+            case ITEM_Double:    return double_type;
+            case ITEM_Long:        return long_type;
+            case ITEM_Null:        return null_type;
+            default:
+                context.verifyError("Should not reach here");
+                return bogus_type;
+        }
+    }
+
+    boolean resolve_and_check_assignability(ClassHierarchyImpl assignResolver, String name, String from_name, boolean from_is_array, boolean from_is_object) {
+        //let's delegate assignability to SPI
+        var desc = Util.toClassDesc(name);
+        if (assignResolver.isInterface(desc)) {
+            return !from_is_array || "java/lang/Cloneable".equals(name) || "java/io/Serializable".equals(name);
+        } else if (from_is_object) {
+            return assignResolver.isAssignableFrom(desc, Util.toClassDesc(from_name));
+        }
+        return false;
+    }
+
+    boolean is_reference_assignable_from(VerificationType from, VerifierImpl context) {
+        ClassHierarchyImpl clsTree = context.class_hierarchy();
+        if (from.is_null()) {
+            return true;
+        } else if (is_null()) {
+            return false;
+        } else if (name().equals(from.name())) {
+            return true;
+        } else if (is_object()) {
+            if (VerifierImpl.java_lang_Object.equals(name())) {
+                return true;
+            }
+            return resolve_and_check_assignability(clsTree, name(), from.name(), from.is_array(), from.is_object());
+        } else if (is_array() && from.is_array()) {
+            VerificationType comp_this = get_component(context);
+            VerificationType comp_from = from.get_component(context);
+            if (!comp_this.is_bogus() && !comp_from.is_bogus()) {
+                return comp_this.is_component_assignable_from(comp_from, context);
+            }
+        }
+        return false;
+    }
+
+    VerificationType get_component(VerifierImpl context) {
+        if (!(is_array() && name().length() >= 2)) context.verifyError("Must be a valid array");
+        var ss = new VerificationSignature(name(), false, context);
+        ss.skipArrayPrefix(1);
+        switch (ss.type()) {
+            case T_BOOLEAN: return VerificationType.boolean_type;
+            case T_BYTE:        return VerificationType.byte_type;
+            case T_CHAR:        return VerificationType.char_type;
+            case T_SHORT:     return VerificationType.short_type;
+            case T_INT:         return VerificationType.integer_type;
+            case T_LONG:        return VerificationType.long_type;
+            case T_FLOAT:     return VerificationType.float_type;
+            case T_DOUBLE:    return VerificationType.double_type;
+            case T_ARRAY:
+            case T_OBJECT: {
+                if (!(ss.isReference())) context.verifyError("Unchecked verifier input");
+                String component = ss.asSymbol();
+                return VerificationType.reference_type(component);
+         }
+         default:
+             return VerificationType.bogus_type;
+        }
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/classfile/impl/verifier/VerificationWrapper$ConstantPoolWrapper.class b/tests/test_data/std/jdk/internal/classfile/impl/verifier/VerificationWrapper$ConstantPoolWrapper.class
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HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/classfile/impl/verifier/VerificationWrapper.class b/tests/test_data/std/jdk/internal/classfile/impl/verifier/VerificationWrapper.class
new file mode 100644
index 0000000000000000000000000000000000000000..3abca86273da623b063f0cd2f7dc36739c3e9d51
GIT binary patch
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/classfile/impl/verifier/VerificationWrapper.java b/tests/test_data/std/jdk/internal/classfile/impl/verifier/VerificationWrapper.java
new file mode 100644
index 00000000..d34f579b
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/classfile/impl/verifier/VerificationWrapper.java
@@ -0,0 +1,204 @@
+/*
+ * Copyright (c) 2022, 2024, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ *
+ */
+package jdk.internal.classfile.impl.verifier;
+
+import java.lang.constant.ClassDesc;
+import java.util.LinkedList;
+import java.util.List;
+
+import java.lang.classfile.constantpool.ClassEntry;
+import java.lang.classfile.constantpool.DynamicConstantPoolEntry;
+import java.lang.classfile.constantpool.MemberRefEntry;
+import java.lang.classfile.constantpool.NameAndTypeEntry;
+import java.lang.reflect.AccessFlag;
+import java.util.stream.Collectors;
+import java.lang.classfile.ClassModel;
+import java.lang.classfile.constantpool.ConstantPool;
+import java.lang.classfile.MethodModel;
+import java.lang.classfile.attribute.LocalVariableInfo;
+import java.lang.classfile.Attributes;
+import jdk.internal.classfile.impl.BoundAttribute;
+import jdk.internal.classfile.impl.CodeImpl;
+import jdk.internal.classfile.impl.Util;
+
+public final class VerificationWrapper {
+    private final ClassModel clm;
+    private final ConstantPoolWrapper cp;
+
+    public VerificationWrapper(ClassModel clm) {
+        this.clm = clm;
+        this.cp = new ConstantPoolWrapper(clm.constantPool());
+     }
+
+    String thisClassName() {
+        return clm.thisClass().asInternalName();
+    }
+
+    int majorVersion() {
+        return clm.majorVersion();
+    }
+
+    String superclassName() {
+        return clm.superclass().map(ClassEntry::asInternalName).orElse(null);
+    }
+
+    Iterable<String> interfaceNames() {
+        return Util.mappedList(clm.interfaces(), ClassEntry::asInternalName);
+    }
+
+    Iterable<MethodWrapper> methods() {
+        return clm.methods().stream().map(m -> new MethodWrapper(m)).toList();
+    }
+
+    boolean findField(String name, String sig) {
+        for (var f : clm.fields())
+            if (f.fieldName().stringValue().equals(name) && f.fieldType().stringValue().equals(sig))
+                return true;
+        return false;
+    }
+
+    class MethodWrapper {
+
+        final MethodModel m;
+        private final CodeImpl c;
+        private final List<int[]> exc;
+
+        MethodWrapper(MethodModel m) {
+            this.m = m;
+            this.c = (CodeImpl)m.code().orElse(null);
+            exc = new LinkedList<>();
+            if (c != null) c.iterateExceptionHandlers((start, end, handler, catchType) -> {
+                exc.add(new int[] {start, end, handler, catchType});
+            });
+        }
+
+        ConstantPoolWrapper constantPool() {
+            return cp;
+        }
+
+        boolean isNative() {
+            return m.flags().has(AccessFlag.NATIVE);
+        }
+
+        boolean isAbstract() {
+            return m.flags().has(AccessFlag.ABSTRACT);
+        }
+
+        boolean isBridge() {
+            return m.flags().has(AccessFlag.BRIDGE);
+        }
+
+        boolean isStatic() {
+            return m.flags().has(AccessFlag.STATIC);
+        }
+
+        String name() {
+            return m.methodName().stringValue();
+        }
+
+        int maxStack() {
+            return c == null ? 0 : c.maxStack();
+        }
+
+        int maxLocals() {
+            return c == null ? 0 : c.maxLocals();
+        }
+
+        String descriptor() {
+            return m.methodType().stringValue();
+        }
+
+        String parameters() {
+            return m.methodTypeSymbol().parameterList().stream().map(ClassDesc::displayName).collect(Collectors.joining(","));
+        }
+
+        int codeLength() {
+            return c == null ? 0 : c.codeLength();
+        }
+
+        byte[] codeArray() {
+            return c == null ? null : c.codeArray();
+        }
+
+        List<int[]> exceptionTable() {
+            return exc;
+        }
+
+        List<LocalVariableInfo> localVariableTable() {
+            var attro = c.findAttribute(Attributes.localVariableTable());
+            return attro.map(lvta -> lvta.localVariables()).orElse(List.of());
+        }
+
+        byte[] stackMapTableRawData() {
+            var attro = c.findAttribute(Attributes.stackMapTable());
+            return attro.map(attr -> ((BoundAttribute) attr).contents()).orElse(null);
+        }
+
+    }
+
+    static class ConstantPoolWrapper {
+
+        private final ConstantPool cp;
+
+        ConstantPoolWrapper(ConstantPool cp) {
+            this.cp = cp;
+        }
+
+        int entryCount() {
+            return cp.size();
+        }
+
+        String classNameAt(int index) {
+            return cp.entryByIndex(index, ClassEntry.class).asInternalName();
+        }
+
+        String dynamicConstantSignatureAt(int index) {
+            return cp.entryByIndex(index, DynamicConstantPoolEntry.class).type().stringValue();
+        }
+
+        int tagAt(int index) {
+            return cp.entryByIndex(index).tag();
+        }
+
+        private NameAndTypeEntry _refNameType(int index) {
+            var e = cp.entryByIndex(index);
+            return (e instanceof DynamicConstantPoolEntry de) ? de.nameAndType() :
+                    e != null ? ((MemberRefEntry)e).nameAndType() : null;
+        }
+
+        String refNameAt(int index) {
+            return _refNameType(index).name().stringValue();
+        }
+
+        String refSignatureAt(int index) {
+            return _refNameType(index).type().stringValue();
+        }
+
+        int refClassIndexAt(int index) {
+            return cp.entryByIndex(index, MemberRefEntry.class).owner().index();
+        }
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/classfile/impl/verifier/VerifierImpl$1.class b/tests/test_data/std/jdk/internal/classfile/impl/verifier/VerifierImpl$1.class
new file mode 100644
index 0000000000000000000000000000000000000000..0f8584c2f2d1608285b1ff6b92394e931dc53f2c
GIT binary patch
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/classfile/impl/verifier/VerifierImpl$sig_as_verification_types.class b/tests/test_data/std/jdk/internal/classfile/impl/verifier/VerifierImpl$sig_as_verification_types.class
new file mode 100644
index 0000000000000000000000000000000000000000..88c5be3a34e37fa68ff2728a0ed3024e9b083d60
GIT binary patch
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/classfile/impl/verifier/VerifierImpl.class b/tests/test_data/std/jdk/internal/classfile/impl/verifier/VerifierImpl.class
new file mode 100644
index 0000000000000000000000000000000000000000..81fa76d6c00e2adcd515f651239c067f1d60bca0
GIT binary patch
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HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/classfile/impl/verifier/VerifierImpl.java b/tests/test_data/std/jdk/internal/classfile/impl/verifier/VerifierImpl.java
new file mode 100644
index 00000000..11e72567
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/classfile/impl/verifier/VerifierImpl.java
@@ -0,0 +1,1843 @@
+/*
+ * Copyright (c) 2022, 2024, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package jdk.internal.classfile.impl.verifier;
+
+import java.nio.ByteBuffer;
+import java.util.ArrayList;
+import java.util.List;
+import java.util.function.Consumer;
+import java.lang.classfile.ClassHierarchyResolver;
+import java.lang.classfile.ClassModel;
+import java.lang.classfile.components.ClassPrinter;
+import java.lang.classfile.ClassFile;
+import jdk.internal.classfile.impl.ClassHierarchyImpl;
+import jdk.internal.classfile.impl.RawBytecodeHelper;
+import static jdk.internal.classfile.impl.RawBytecodeHelper.ILLEGAL;
+import jdk.internal.classfile.impl.verifier.VerificationWrapper.ConstantPoolWrapper;
+import static jdk.internal.classfile.impl.verifier.VerificationSignature.BasicType.*;
+import jdk.internal.classfile.impl.verifier.VerificationSignature.BasicType;
+import static jdk.internal.classfile.impl.verifier.VerificationFrame.FLAG_THIS_UNINIT;
+
+/**
+ * VerifierImpl performs selected checks and verifications of the class file
+ * format according to {@jvms 4.8 Format Checking},
+ * {@jvms 4.9 Constraints on Java Virtual Machine code},
+ * {@jvms 4.10 Verification of class Files} and {@jvms 6.5 Instructions}
+ *
+ * @see <a href="https://raw.githubusercontent.com/openjdk/jdk/master/src/java.base/share/native/include/classfile_constants.h.template">java.base/share/native/include/classfile_constants.h.template</a>
+ * @see <a href="https://raw.githubusercontent.com/openjdk/jdk/master/src/hotspot/share/classfile/verifier.hpp">hotspot/share/classfile/verifier.hpp</a>
+ * @see <a href="https://raw.githubusercontent.com/openjdk/jdk/master/src/hotspot/share/classfile/verifier.cpp">hotspot/share/classfile/verifier.cpp</a>
+ */
+public final class VerifierImpl {
+    static final int
+            JVM_CONSTANT_Utf8                   = 1,
+            JVM_CONSTANT_Unicode                = 2,
+            JVM_CONSTANT_Integer                = 3,
+            JVM_CONSTANT_Float                  = 4,
+            JVM_CONSTANT_Long                   = 5,
+            JVM_CONSTANT_Double                 = 6,
+            JVM_CONSTANT_Class                  = 7,
+            JVM_CONSTANT_String                 = 8,
+            JVM_CONSTANT_Fieldref               = 9,
+            JVM_CONSTANT_Methodref              = 10,
+            JVM_CONSTANT_InterfaceMethodref     = 11,
+            JVM_CONSTANT_NameAndType            = 12,
+            JVM_CONSTANT_MethodHandle           = 15,
+            JVM_CONSTANT_MethodType             = 16,
+            JVM_CONSTANT_Dynamic                = 17,
+            JVM_CONSTANT_InvokeDynamic          = 18,
+            JVM_CONSTANT_Module                 = 19,
+            JVM_CONSTANT_Package                = 20,
+            JVM_CONSTANT_ExternalMax            = 20;
+
+    static final char JVM_SIGNATURE_SPECIAL = '<',
+            JVM_SIGNATURE_ARRAY = '[',
+            JVM_SIGNATURE_BYTE = 'B',
+            JVM_SIGNATURE_CHAR = 'C',
+            JVM_SIGNATURE_CLASS = 'L',
+            JVM_SIGNATURE_FLOAT = 'F',
+            JVM_SIGNATURE_DOUBLE = 'D',
+            JVM_SIGNATURE_INT = 'I',
+            JVM_SIGNATURE_LONG = 'J',
+            JVM_SIGNATURE_SHORT = 'S',
+            JVM_SIGNATURE_BOOLEAN = 'Z';
+
+    static final String java_lang_String = "java/lang/String";
+    static final String object_initializer_name = "<init>";
+    static final String java_lang_invoke_MethodHandle = "java/lang/invoke/MethodHandle";
+    static final String java_lang_Object = "java/lang/Object";
+    static final String java_lang_invoke_MethodType = "java/lang/invoke/MethodType";
+    static final String java_lang_Throwable = "java/lang/Throwable";
+    static final String java_lang_Class = "java/lang/Class";
+
+    String errorContext = "";
+    private int bci;
+
+    static void log_info(Consumer<String> logger, String messageFormat, Object... args) {
+        if (logger != null) logger.accept(String.format(messageFormat + "%n", args));
+    }
+    private final Consumer<String> _logger;
+    void log_info(String messageFormat, Object... args) {
+        log_info(_logger, messageFormat, args);
+    }
+
+
+    static final int STACKMAP_ATTRIBUTE_MAJOR_VERSION = 50;
+    static final int INVOKEDYNAMIC_MAJOR_VERSION = 51;
+    static final int NOFAILOVER_MAJOR_VERSION = 51;
+    static final int MAX_CODE_SIZE = 65535;
+
+    public static List<VerifyError> verify(ClassModel classModel, Consumer<String> logger) {
+        return verify(classModel, ClassHierarchyResolver.defaultResolver(), logger);
+    }
+
+    public static List<VerifyError> verify(ClassModel classModel, ClassHierarchyResolver classHierarchyResolver, Consumer<String> logger) {
+        var klass = new VerificationWrapper(classModel);
+        log_info(logger, "Start class verification for: %s", klass.thisClassName());
+        try {
+            var errors = new ArrayList<VerifyError>();
+            errors.addAll(new ParserVerifier(classModel).verify());
+            if (is_eligible_for_verification(klass)) {
+                if (klass.majorVersion() >= STACKMAP_ATTRIBUTE_MAJOR_VERSION) {
+                    var verifierErrors = new VerifierImpl(klass, classHierarchyResolver, logger).verify_class();
+                    if (!verifierErrors.isEmpty() && klass.majorVersion() < NOFAILOVER_MAJOR_VERSION) {
+                        log_info(logger, "Fail over class verification to old verifier for: %s", klass.thisClassName());
+                        errors.addAll(inference_verify(klass));
+                    } else {
+                        errors.addAll(verifierErrors);
+                    }
+                } else {
+                    errors.addAll(inference_verify(klass));
+                }
+            }
+            return errors;
+        } finally {
+            log_info(logger, "End class verification for: %s", klass.thisClassName());
+        }
+    }
+
+    public static boolean is_eligible_for_verification(VerificationWrapper klass) {
+        String name = klass.thisClassName();
+        return !java_lang_Object.equals(name) &&
+                !java_lang_Class.equals(name) &&
+                !java_lang_String.equals(name) &&
+                !java_lang_Throwable.equals(name);
+    }
+
+    static List<VerifyError> inference_verify(VerificationWrapper klass) {
+        return List.of(new VerifyError("Inference verification is not supported"));
+    }
+
+    static class sig_as_verification_types {
+        private int _num_args;
+        private ArrayList<VerificationType> _sig_verif_types;
+
+        sig_as_verification_types(ArrayList<VerificationType> sig_verif_types) {
+            this._sig_verif_types = sig_verif_types;
+            this._num_args = 0;
+        }
+
+        int num_args() {
+            return _num_args;
+        }
+
+        void set_num_args(int num_args) {
+            _num_args = num_args;
+        }
+
+        ArrayList<VerificationType> sig_verif_types() {
+            return _sig_verif_types;
+        }
+    }
+
+    VerificationType cp_ref_index_to_type(int index, ConstantPoolWrapper cp) {
+        return cp_index_to_type(cp.refClassIndexAt(index), cp);
+    }
+
+    final VerificationWrapper _klass;
+    final ClassHierarchyImpl _class_hierarchy;
+    VerificationWrapper.MethodWrapper _method;
+    VerificationType _this_type;
+
+    static final int BYTECODE_OFFSET = 1, NEW_OFFSET = 2;
+
+    VerificationWrapper current_class() {
+        return _klass;
+    }
+
+    ClassHierarchyImpl class_hierarchy() {
+        return _class_hierarchy;
+    }
+
+    VerificationType current_type() {
+        return _this_type;
+    }
+
+    VerificationType cp_index_to_type(int index, ConstantPoolWrapper cp) {
+        return VerificationType.reference_type(cp.classNameAt(index));
+    }
+
+    int change_sig_to_verificationType(VerificationSignature sig_type, VerificationType inference_types[], int inference_type_index) {
+        BasicType bt = sig_type.type();
+        switch (bt) {
+            case T_OBJECT:
+            case T_ARRAY:
+                String name = sig_type.asSymbol();
+                inference_types[inference_type_index] = VerificationType.reference_type(name);
+                return 1;
+            case T_LONG:
+                inference_types[inference_type_index] = VerificationType.long_type;
+                inference_types[++inference_type_index] = VerificationType.long2_type;
+                return 2;
+            case T_DOUBLE:
+                inference_types[inference_type_index] = VerificationType.double_type;
+                inference_types[++inference_type_index] = VerificationType.double2_type;
+                return 2;
+            case T_INT:
+            case T_BOOLEAN:
+            case T_BYTE:
+            case T_CHAR:
+            case T_SHORT:
+                inference_types[inference_type_index] = VerificationType.integer_type;
+                return 1;
+            case T_FLOAT:
+                inference_types[inference_type_index] = VerificationType.float_type;
+                return 1;
+            default:
+                verifyError("Should not reach here");
+                return 1;
+        }
+    }
+
+    private static final int NONZERO_PADDING_BYTES_IN_SWITCH_MAJOR_VERSION = 51;
+    private static final int STATIC_METHOD_IN_INTERFACE_MAJOR_VERSION = 52;
+    private static final int MAX_ARRAY_DIMENSIONS = 255;
+
+    VerifierImpl(VerificationWrapper klass, ClassHierarchyResolver classHierarchyResolver, Consumer<String> logger) {
+        _klass = klass;
+        _class_hierarchy = new ClassHierarchyImpl(classHierarchyResolver);
+        _this_type = VerificationType.reference_type(klass.thisClassName());
+        _logger = logger;
+    }
+
+    private VerificationType object_type() {
+        return VerificationType.reference_type(java_lang_Object);
+    }
+
+    List<VerifyError> verify_class() {
+        log_info("Verifying class %s with new format", _klass.thisClassName());
+        var errors = new ArrayList<VerifyError>();
+        for (VerificationWrapper.MethodWrapper m : _klass.methods()) {
+            if (m.isNative() || m.isAbstract() || m.isBridge()) {
+                continue;
+            }
+            verify_method(m, errors);
+        }
+        return errors;
+    }
+
+    void translate_signature(String method_sig, sig_as_verification_types sig_verif_types) {
+        var sig_stream = new VerificationSignature(method_sig, true, this);
+        VerificationType[] sig_type = new VerificationType[2];
+        int sig_i = 0;
+        ArrayList<VerificationType> verif_types = sig_verif_types.sig_verif_types();
+        while (!sig_stream.atReturnType()) {
+            int n = change_sig_to_verificationType(sig_stream, sig_type, 0);
+            if (n > 2) verifyError("Unexpected signature type");
+            for (int x = 0; x < n; x++) {
+                verif_types.add(sig_type[x]);
+            }
+            sig_i += n;
+            sig_stream.next();
+        }
+        sig_verif_types.set_num_args(sig_i);
+        if (sig_stream.type() != BasicType.T_VOID) {
+            int n = change_sig_to_verificationType(sig_stream, sig_type, 0);
+            if (n > 2) verifyError("Unexpected signature return type");
+            for (int y = 0; y < n; y++) {
+                verif_types.add(sig_type[y]);
+            }
+        }
+    }
+
+    void create_method_sig_entry(sig_as_verification_types sig_verif_types, String method_sig) {
+        translate_signature(method_sig, sig_verif_types);
+    }
+
+    void verify_method(VerificationWrapper.MethodWrapper m, List<VerifyError> errorsCollector) {
+        try {
+            verify_method(m);
+        } catch (VerifyError err) {
+            errorsCollector.add(err);
+        } catch (Error | Exception e) {
+            errorsCollector.add(new VerifyError(e.toString()));
+        }
+    }
+
+    @SuppressWarnings("fallthrough")
+    void verify_method(VerificationWrapper.MethodWrapper m) {
+        _method = m;
+        log_info(_logger, "Verifying method %s%s", m.name(), m.descriptor());
+        byte[] codeArray = m.codeArray();
+        if (codeArray == null) verifyError("Missing Code attribute");
+        int max_locals = m.maxLocals();
+        int max_stack = m.maxStack();
+        byte[] stackmap_data = m.stackMapTableRawData();
+        var cp = m.constantPool();
+        if (!VerificationSignature.isValidMethodSignature(m.descriptor())) verifyError("Invalid method signature");
+        VerificationFrame current_frame = new VerificationFrame(max_locals, max_stack, this);
+        VerificationType return_type = current_frame.set_locals_from_arg(m, current_type());
+        int stackmap_index = 0;
+        int code_length = m.codeLength();
+        if (code_length < 1 || code_length > MAX_CODE_SIZE) {
+            verifyError(String.format("Invalid method Code length %d", code_length));
+        }
+        var code = ByteBuffer.wrap(codeArray, 0, _method.codeLength());
+        byte[] code_data = generate_code_data(code, code_length);
+        int ex_minmax[] = new int[] {code_length, -1};
+        verify_exception_handler_table(code_length, code_data, ex_minmax);
+        verify_local_variable_table(code_length, code_data);
+
+        VerificationTable stackmap_table = new VerificationTable(stackmap_data, current_frame, max_locals, max_stack, code_data, code_length, cp, this);
+
+        var bcs = new RawBytecodeHelper(code);
+        boolean no_control_flow = false;
+        int opcode;
+        while (!bcs.isLastBytecode()) {
+            opcode = bcs.rawNext();
+            bci = bcs.bci;
+            current_frame.set_offset(bci);
+            current_frame.set_mark();
+            stackmap_index = verify_stackmap_table(stackmap_index, bci, current_frame, stackmap_table, no_control_flow);
+            boolean this_uninit = false;
+            boolean verified_exc_handlers = false;
+            {
+                int index;
+                int target;
+                VerificationType type, type2 = null;
+                VerificationType atype;
+                if (bcs.isWide) {
+                    if (opcode != ClassFile.IINC && opcode != ClassFile.ILOAD
+                        && opcode != ClassFile.ALOAD && opcode != ClassFile.LLOAD
+                        && opcode != ClassFile.ISTORE && opcode != ClassFile.ASTORE
+                        && opcode != ClassFile.LSTORE && opcode != ClassFile.FLOAD
+                        && opcode != ClassFile.DLOAD && opcode != ClassFile.FSTORE
+                        && opcode != ClassFile.DSTORE) {
+                        verifyError("Bad wide instruction");
+                    }
+                }
+                if (VerificationBytecodes.is_store_into_local(opcode) && bci >= ex_minmax[0] && bci < ex_minmax[1]) {
+                    verify_exception_handler_targets(bci, this_uninit, current_frame, stackmap_table);
+                    verified_exc_handlers = true;
+                }
+                switch (opcode) {
+                    case ClassFile.NOP :
+                        no_control_flow = false; break;
+                    case ClassFile.ACONST_NULL :
+                        current_frame.push_stack(
+                            VerificationType.null_type);
+                        no_control_flow = false; break;
+                    case ClassFile.ICONST_M1 :
+                    case ClassFile.ICONST_0 :
+                    case ClassFile.ICONST_1 :
+                    case ClassFile.ICONST_2 :
+                    case ClassFile.ICONST_3 :
+                    case ClassFile.ICONST_4 :
+                    case ClassFile.ICONST_5 :
+                        current_frame.push_stack(
+                            VerificationType.integer_type);
+                        no_control_flow = false; break;
+                    case ClassFile.LCONST_0 :
+                    case ClassFile.LCONST_1 :
+                        current_frame.push_stack_2(
+                            VerificationType.long_type,
+                            VerificationType.long2_type);
+                        no_control_flow = false; break;
+                    case ClassFile.FCONST_0 :
+                    case ClassFile.FCONST_1 :
+                    case ClassFile.FCONST_2 :
+                        current_frame.push_stack(
+                            VerificationType.float_type);
+                        no_control_flow = false; break;
+                    case ClassFile.DCONST_0 :
+                    case ClassFile.DCONST_1 :
+                        current_frame.push_stack_2(
+                            VerificationType.double_type,
+                            VerificationType.double2_type);
+                        no_control_flow = false; break;
+                    case ClassFile.SIPUSH :
+                    case ClassFile.BIPUSH :
+                        current_frame.push_stack(
+                            VerificationType.integer_type);
+                        no_control_flow = false; break;
+                    case ClassFile.LDC :
+                        verify_ldc(
+                            opcode, bcs.getIndexU1(), current_frame,
+                            cp, bci);
+                        no_control_flow = false; break;
+                    case ClassFile.LDC_W :
+                    case ClassFile.LDC2_W :
+                        verify_ldc(
+                            opcode, bcs.getIndexU2(), current_frame,
+                            cp, bci);
+                        no_control_flow = false; break;
+                    case ClassFile.ILOAD :
+                        verify_iload(bcs.getIndex(), current_frame);
+                        no_control_flow = false; break;
+                    case ClassFile.ILOAD_0 :
+                    case ClassFile.ILOAD_1 :
+                    case ClassFile.ILOAD_2 :
+                    case ClassFile.ILOAD_3 :
+                        index = opcode - ClassFile.ILOAD_0;
+                        verify_iload(index, current_frame);
+                        no_control_flow = false; break;
+                    case ClassFile.LLOAD :
+                        verify_lload(bcs.getIndex(), current_frame);
+                        no_control_flow = false; break;
+                    case ClassFile.LLOAD_0 :
+                    case ClassFile.LLOAD_1 :
+                    case ClassFile.LLOAD_2 :
+                    case ClassFile.LLOAD_3 :
+                        index = opcode - ClassFile.LLOAD_0;
+                        verify_lload(index, current_frame);
+                        no_control_flow = false; break;
+                    case ClassFile.FLOAD :
+                        verify_fload(bcs.getIndex(), current_frame);
+                        no_control_flow = false; break;
+                    case ClassFile.FLOAD_0 :
+                    case ClassFile.FLOAD_1 :
+                    case ClassFile.FLOAD_2 :
+                    case ClassFile.FLOAD_3 :
+                        index = opcode - ClassFile.FLOAD_0;
+                        verify_fload(index, current_frame);
+                        no_control_flow = false; break;
+                    case ClassFile.DLOAD :
+                        verify_dload(bcs.getIndex(), current_frame);
+                        no_control_flow = false; break;
+                    case ClassFile.DLOAD_0 :
+                    case ClassFile.DLOAD_1 :
+                    case ClassFile.DLOAD_2 :
+                    case ClassFile.DLOAD_3 :
+                        index = opcode - ClassFile.DLOAD_0;
+                        verify_dload(index, current_frame);
+                        no_control_flow = false; break;
+                    case ClassFile.ALOAD :
+                        verify_aload(bcs.getIndex(), current_frame);
+                        no_control_flow = false; break;
+                    case ClassFile.ALOAD_0 :
+                    case ClassFile.ALOAD_1 :
+                    case ClassFile.ALOAD_2 :
+                    case ClassFile.ALOAD_3 :
+                        index = opcode - ClassFile.ALOAD_0;
+                        verify_aload(index, current_frame);
+                        no_control_flow = false; break;
+                    case ClassFile.IALOAD :
+                        type = current_frame.pop_stack(
+                            VerificationType.integer_type);
+                        atype = current_frame.pop_stack(
+                            VerificationType.reference_check);
+                        if (!atype.is_int_array()) {
+                            verifyError("Bad type");
+                        }
+                        current_frame.push_stack(
+                            VerificationType.integer_type);
+                        no_control_flow = false; break;
+                    case ClassFile.BALOAD :
+                        type = current_frame.pop_stack(
+                            VerificationType.integer_type);
+                        atype = current_frame.pop_stack(
+                            VerificationType.reference_check);
+                        if (!atype.is_bool_array() && !atype.is_byte_array()) {
+                            verifyError("Bad type");
+                        }
+                        current_frame.push_stack(
+                            VerificationType.integer_type);
+                        no_control_flow = false; break;
+                    case ClassFile.CALOAD :
+                        type = current_frame.pop_stack(
+                            VerificationType.integer_type);
+                        atype = current_frame.pop_stack(
+                            VerificationType.reference_check);
+                        if (!atype.is_char_array()) {
+                            verifyError("Bad type");
+                        }
+                        current_frame.push_stack(
+                            VerificationType.integer_type);
+                        no_control_flow = false; break;
+                    case ClassFile.SALOAD :
+                        type = current_frame.pop_stack(
+                            VerificationType.integer_type);
+                        atype = current_frame.pop_stack(
+                            VerificationType.reference_check);
+                        if (!atype.is_short_array()) {
+                            verifyError("Bad type");
+                        }
+                        current_frame.push_stack(
+                            VerificationType.integer_type);
+                        no_control_flow = false; break;
+                    case ClassFile.LALOAD :
+                        type = current_frame.pop_stack(
+                            VerificationType.integer_type);
+                        atype = current_frame.pop_stack(
+                            VerificationType.reference_check);
+                        if (!atype.is_long_array()) {
+                            verifyError("Bad type");
+                        }
+                        current_frame.push_stack_2(
+                            VerificationType.long_type,
+                            VerificationType.long2_type);
+                        no_control_flow = false; break;
+                    case ClassFile.FALOAD :
+                        type = current_frame.pop_stack(
+                            VerificationType.integer_type);
+                        atype = current_frame.pop_stack(
+                            VerificationType.reference_check);
+                        if (!atype.is_float_array()) {
+                            verifyError("Bad type");
+                        }
+                        current_frame.push_stack(
+                            VerificationType.float_type);
+                        no_control_flow = false; break;
+                    case ClassFile.DALOAD :
+                        type = current_frame.pop_stack(
+                            VerificationType.integer_type);
+                        atype = current_frame.pop_stack(
+                            VerificationType.reference_check);
+                        if (!atype.is_double_array()) {
+                            verifyError("Bad type");
+                        }
+                        current_frame.push_stack_2(
+                            VerificationType.double_type,
+                            VerificationType.double2_type);
+                        no_control_flow = false; break;
+                    case ClassFile.AALOAD : {
+                        type = current_frame.pop_stack(
+                            VerificationType.integer_type);
+                        atype = current_frame.pop_stack(
+                            VerificationType.reference_check);
+                        if (!atype.is_reference_array()) {
+                            verifyError("Bad type");
+                        }
+                        if (atype.is_null()) {
+                            current_frame.push_stack(
+                                VerificationType.null_type);
+                        } else {
+                            VerificationType component =
+                                atype.get_component(this);
+                            current_frame.push_stack(component);
+                        }
+                        no_control_flow = false; break;
+                    }
+                    case ClassFile.ISTORE :
+                        verify_istore(bcs.getIndex(), current_frame);
+                        no_control_flow = false; break;
+                    case ClassFile.ISTORE_0 :
+                    case ClassFile.ISTORE_1 :
+                    case ClassFile.ISTORE_2 :
+                    case ClassFile.ISTORE_3 :
+                        index = opcode - ClassFile.ISTORE_0;
+                        verify_istore(index, current_frame);
+                        no_control_flow = false; break;
+                    case ClassFile.LSTORE :
+                        verify_lstore(bcs.getIndex(), current_frame);
+                        no_control_flow = false; break;
+                    case ClassFile.LSTORE_0 :
+                    case ClassFile.LSTORE_1 :
+                    case ClassFile.LSTORE_2 :
+                    case ClassFile.LSTORE_3 :
+                        index = opcode - ClassFile.LSTORE_0;
+                        verify_lstore(index, current_frame);
+                        no_control_flow = false; break;
+                    case ClassFile.FSTORE :
+                        verify_fstore(bcs.getIndex(), current_frame);
+                        no_control_flow = false; break;
+                    case ClassFile.FSTORE_0 :
+                    case ClassFile.FSTORE_1 :
+                    case ClassFile.FSTORE_2 :
+                    case ClassFile.FSTORE_3 :
+                        index = opcode - ClassFile.FSTORE_0;
+                        verify_fstore(index, current_frame);
+                        no_control_flow = false; break;
+                    case ClassFile.DSTORE :
+                        verify_dstore(bcs.getIndex(), current_frame);
+                        no_control_flow = false; break;
+                    case ClassFile.DSTORE_0 :
+                    case ClassFile.DSTORE_1 :
+                    case ClassFile.DSTORE_2 :
+                    case ClassFile.DSTORE_3 :
+                        index = opcode - ClassFile.DSTORE_0;
+                        verify_dstore(index, current_frame);
+                        no_control_flow = false; break;
+                    case ClassFile.ASTORE :
+                        verify_astore(bcs.getIndex(), current_frame);
+                        no_control_flow = false; break;
+                    case ClassFile.ASTORE_0 :
+                    case ClassFile.ASTORE_1 :
+                    case ClassFile.ASTORE_2 :
+                    case ClassFile.ASTORE_3 :
+                        index = opcode - ClassFile.ASTORE_0;
+                        verify_astore(index, current_frame);
+                        no_control_flow = false; break;
+                    case ClassFile.IASTORE :
+                        type = current_frame.pop_stack(
+                            VerificationType.integer_type);
+                        type2 = current_frame.pop_stack(
+                            VerificationType.integer_type);
+                        atype = current_frame.pop_stack(
+                            VerificationType.reference_check);
+                        if (!atype.is_int_array()) {
+                            verifyError("Bad type");
+                        }
+                        no_control_flow = false; break;
+                    case ClassFile.BASTORE :
+                        type = current_frame.pop_stack(
+                            VerificationType.integer_type);
+                        type2 = current_frame.pop_stack(
+                            VerificationType.integer_type);
+                        atype = current_frame.pop_stack(
+                            VerificationType.reference_check);
+                        if (!atype.is_bool_array() && !atype.is_byte_array()) {
+                            verifyError("Bad type");
+                        }
+                        no_control_flow = false; break;
+                    case ClassFile.CASTORE :
+                        current_frame.pop_stack(
+                            VerificationType.integer_type);
+                        current_frame.pop_stack(
+                            VerificationType.integer_type);
+                        atype = current_frame.pop_stack(
+                            VerificationType.reference_check);
+                        if (!atype.is_char_array()) {
+                            verifyError("Bad type");
+                        }
+                        no_control_flow = false; break;
+                    case ClassFile.SASTORE :
+                        current_frame.pop_stack(
+                            VerificationType.integer_type);
+                        current_frame.pop_stack(
+                            VerificationType.integer_type);
+                        atype = current_frame.pop_stack(
+                            VerificationType.reference_check);
+                        if (!atype.is_short_array()) {
+                            verifyError("Bad type");
+                        }
+                        no_control_flow = false; break;
+                    case ClassFile.LASTORE :
+                        current_frame.pop_stack_2(
+                            VerificationType.long2_type,
+                            VerificationType.long_type);
+                        current_frame.pop_stack(
+                            VerificationType.integer_type);
+                        atype = current_frame.pop_stack(
+                            VerificationType.reference_check);
+                        if (!atype.is_long_array()) {
+                            verifyError("Bad type");
+                        }
+                        no_control_flow = false; break;
+                    case ClassFile.FASTORE :
+                        current_frame.pop_stack(
+                            VerificationType.float_type);
+                        current_frame.pop_stack
+                            (VerificationType.integer_type);
+                        atype = current_frame.pop_stack(
+                            VerificationType.reference_check);
+                        if (!atype.is_float_array()) {
+                            verifyError("Bad type");
+                        }
+                        no_control_flow = false; break;
+                    case ClassFile.DASTORE :
+                        current_frame.pop_stack_2(
+                            VerificationType.double2_type,
+                            VerificationType.double_type);
+                        current_frame.pop_stack(
+                            VerificationType.integer_type);
+                        atype = current_frame.pop_stack(
+                            VerificationType.reference_check);
+                        if (!atype.is_double_array()) {
+                            verifyError("Bad type");
+                        }
+                        no_control_flow = false; break;
+                    case ClassFile.AASTORE :
+                        type = current_frame.pop_stack(object_type());
+                        type2 = current_frame.pop_stack(
+                            VerificationType.integer_type);
+                        atype = current_frame.pop_stack(
+                            VerificationType.reference_check);
+                        // more type-checking is done at runtime
+                        if (!atype.is_reference_array()) {
+                            verifyError("Bad type");
+                        }
+                        // 4938384: relaxed constraint in JVMS 3nd edition.
+                        no_control_flow = false; break;
+                    case ClassFile.POP :
+                        current_frame.pop_stack(
+                            VerificationType.category1_check);
+                        no_control_flow = false; break;
+                    case ClassFile.POP2 :
+                        type = current_frame.pop_stack();
+                        if (type.is_category1(this)) {
+                            current_frame.pop_stack(
+                                VerificationType.category1_check);
+                        } else if (type.is_category2_2nd()) {
+                            current_frame.pop_stack(
+                                VerificationType.category2_check);
+                        } else {
+                            verifyError("Bad type");
+                        }
+                        no_control_flow = false; break;
+                    case ClassFile.DUP :
+                        type = current_frame.pop_stack(
+                            VerificationType.category1_check);
+                        current_frame.push_stack(type);
+                        current_frame.push_stack(type);
+                        no_control_flow = false; break;
+                    case ClassFile.DUP_X1 :
+                        type = current_frame.pop_stack(
+                            VerificationType.category1_check);
+                        type2 = current_frame.pop_stack(
+                            VerificationType.category1_check);
+                        current_frame.push_stack(type);
+                        current_frame.push_stack(type2);
+                        current_frame.push_stack(type);
+                        no_control_flow = false; break;
+                    case ClassFile.DUP_X2 :
+                    {
+                        VerificationType type3 = null;
+                        type = current_frame.pop_stack(
+                            VerificationType.category1_check);
+                        type2 = current_frame.pop_stack();
+                        if (type2.is_category1(this)) {
+                            type3 = current_frame.pop_stack(
+                                VerificationType.category1_check);
+                        } else if (type2.is_category2_2nd()) {
+                            type3 = current_frame.pop_stack(
+                                VerificationType.category2_check);
+                        } else {
+                            verifyError("Bad type");
+                        }
+                        current_frame.push_stack(type);
+                        current_frame.push_stack(type3);
+                        current_frame.push_stack(type2);
+                        current_frame.push_stack(type);
+                        no_control_flow = false; break;
+                    }
+                    case ClassFile.DUP2 :
+                        type = current_frame.pop_stack();
+                        if (type.is_category1(this)) {
+                            type2 = current_frame.pop_stack(
+                                VerificationType.category1_check);
+                        } else if (type.is_category2_2nd()) {
+                            type2 = current_frame.pop_stack(
+                                VerificationType.category2_check);
+                        } else {
+                            verifyError("Bad type");
+                        }
+                        current_frame.push_stack(type2);
+                        current_frame.push_stack(type);
+                        current_frame.push_stack(type2);
+                        current_frame.push_stack(type);
+                        no_control_flow = false; break;
+                    case ClassFile.DUP2_X1 :
+                    {
+                        VerificationType type3;
+                        type = current_frame.pop_stack();
+                        if (type.is_category1(this)) {
+                            type2 = current_frame.pop_stack(
+                                VerificationType.category1_check);
+                        } else if (type.is_category2_2nd()) {
+                            type2 = current_frame.pop_stack(
+                                VerificationType.category2_check);
+                        } else {
+                            verifyError("Bad type");
+                        }
+                        type3 = current_frame.pop_stack(
+                            VerificationType.category1_check);
+                        current_frame.push_stack(type2);
+                        current_frame.push_stack(type);
+                        current_frame.push_stack(type3);
+                        current_frame.push_stack(type2);
+                        current_frame.push_stack(type);
+                        no_control_flow = false; break;
+                    }
+                    case ClassFile.DUP2_X2 :
+                        VerificationType type3, type4 = null;
+                        type = current_frame.pop_stack();
+                        if (type.is_category1(this)) {
+                            type2 = current_frame.pop_stack(
+                                VerificationType.category1_check);
+                        } else if (type.is_category2_2nd()) {
+                            type2 = current_frame.pop_stack(
+                                VerificationType.category2_check);
+                        } else {
+                            verifyError("Bad type");
+                        }
+                        type3 = current_frame.pop_stack();
+                        if (type3.is_category1(this)) {
+                            type4 = current_frame.pop_stack(
+                                VerificationType.category1_check);
+                        } else if (type3.is_category2_2nd()) {
+                            type4 = current_frame.pop_stack(
+                                VerificationType.category2_check);
+                        } else {
+                            verifyError("Bad type");
+                        }
+                        current_frame.push_stack(type2);
+                        current_frame.push_stack(type);
+                        current_frame.push_stack(type4);
+                        current_frame.push_stack(type3);
+                        current_frame.push_stack(type2);
+                        current_frame.push_stack(type);
+                        no_control_flow = false; break;
+                    case ClassFile.SWAP :
+                        type = current_frame.pop_stack(
+                            VerificationType.category1_check);
+                        type2 = current_frame.pop_stack(
+                            VerificationType.category1_check);
+                        current_frame.push_stack(type);
+                        current_frame.push_stack(type2);
+                        no_control_flow = false; break;
+                    case ClassFile.IADD :
+                    case ClassFile.ISUB :
+                    case ClassFile.IMUL :
+                    case ClassFile.IDIV :
+                    case ClassFile.IREM :
+                    case ClassFile.ISHL :
+                    case ClassFile.ISHR :
+                    case ClassFile.IUSHR :
+                    case ClassFile.IOR :
+                    case ClassFile.IXOR :
+                    case ClassFile.IAND :
+                        current_frame.pop_stack(
+                            VerificationType.integer_type);
+                        // fall through
+                    case ClassFile.INEG :
+                        current_frame.pop_stack(
+                            VerificationType.integer_type);
+                        current_frame.push_stack(
+                            VerificationType.integer_type);
+                        no_control_flow = false; break;
+                    case ClassFile.LADD :
+                    case ClassFile.LSUB :
+                    case ClassFile.LMUL :
+                    case ClassFile.LDIV :
+                    case ClassFile.LREM :
+                    case ClassFile.LAND :
+                    case ClassFile.LOR :
+                    case ClassFile.LXOR :
+                        current_frame.pop_stack_2(
+                            VerificationType.long2_type,
+                            VerificationType.long_type);
+                        // fall through
+                    case ClassFile.LNEG :
+                        current_frame.pop_stack_2(
+                            VerificationType.long2_type,
+                            VerificationType.long_type);
+                        current_frame.push_stack_2(
+                            VerificationType.long_type,
+                            VerificationType.long2_type);
+                        no_control_flow = false; break;
+                    case ClassFile.LSHL :
+                    case ClassFile.LSHR :
+                    case ClassFile.LUSHR :
+                        current_frame.pop_stack(
+                            VerificationType.integer_type);
+                        current_frame.pop_stack_2(
+                            VerificationType.long2_type,
+                            VerificationType.long_type);
+                        current_frame.push_stack_2(
+                            VerificationType.long_type,
+                            VerificationType.long2_type);
+                        no_control_flow = false; break;
+                    case ClassFile.FADD :
+                    case ClassFile.FSUB :
+                    case ClassFile.FMUL :
+                    case ClassFile.FDIV :
+                    case ClassFile.FREM :
+                        current_frame.pop_stack(
+                            VerificationType.float_type);
+                        // fall through
+                    case ClassFile.FNEG :
+                        current_frame.pop_stack(
+                            VerificationType.float_type);
+                        current_frame.push_stack(
+                            VerificationType.float_type);
+                        no_control_flow = false; break;
+                    case ClassFile.DADD :
+                    case ClassFile.DSUB :
+                    case ClassFile.DMUL :
+                    case ClassFile.DDIV :
+                    case ClassFile.DREM :
+                        current_frame.pop_stack_2(
+                            VerificationType.double2_type,
+                            VerificationType.double_type);
+                        // fall through
+                    case ClassFile.DNEG :
+                        current_frame.pop_stack_2(
+                            VerificationType.double2_type,
+                            VerificationType.double_type);
+                        current_frame.push_stack_2(
+                            VerificationType.double_type,
+                            VerificationType.double2_type);
+                        no_control_flow = false; break;
+                                case ClassFile.IINC :
+                                    verify_iinc(bcs.getIndex(), current_frame);
+                                    no_control_flow = false; break;
+                                case ClassFile.I2L :
+                                    type = current_frame.pop_stack(
+                                        VerificationType.integer_type);
+                                    current_frame.push_stack_2(
+                                        VerificationType.long_type,
+                                        VerificationType.long2_type);
+                                    no_control_flow = false; break;
+                             case ClassFile.L2I :
+                                    current_frame.pop_stack_2(
+                                        VerificationType.long2_type,
+                                        VerificationType.long_type);
+                                    current_frame.push_stack(
+                                        VerificationType.integer_type);
+                                    no_control_flow = false; break;
+                                case ClassFile.I2F :
+                                    current_frame.pop_stack(
+                                        VerificationType.integer_type);
+                                    current_frame.push_stack(
+                                        VerificationType.float_type);
+                                    no_control_flow = false; break;
+                    case ClassFile.I2D :
+                        current_frame.pop_stack(
+                            VerificationType.integer_type);
+                        current_frame.push_stack_2(
+                            VerificationType.double_type,
+                            VerificationType.double2_type);
+                        no_control_flow = false; break;
+                    case ClassFile.L2F :
+                        current_frame.pop_stack_2(
+                            VerificationType.long2_type,
+                            VerificationType.long_type);
+                        current_frame.push_stack(
+                            VerificationType.float_type);
+                        no_control_flow = false; break;
+                    case ClassFile.L2D :
+                        current_frame.pop_stack_2(
+                            VerificationType.long2_type,
+                            VerificationType.long_type);
+                        current_frame.push_stack_2(
+                            VerificationType.double_type,
+                            VerificationType.double2_type);
+                        no_control_flow = false; break;
+                    case ClassFile.F2I :
+                        current_frame.pop_stack(
+                            VerificationType.float_type);
+                        current_frame.push_stack(
+                            VerificationType.integer_type);
+                        no_control_flow = false; break;
+                    case ClassFile.F2L :
+                        current_frame.pop_stack(
+                            VerificationType.float_type);
+                        current_frame.push_stack_2(
+                            VerificationType.long_type,
+                            VerificationType.long2_type);
+                        no_control_flow = false; break;
+                    case ClassFile.F2D :
+                        current_frame.pop_stack(
+                            VerificationType.float_type);
+                        current_frame.push_stack_2(
+                            VerificationType.double_type,
+                            VerificationType.double2_type);
+                        no_control_flow = false; break;
+                    case ClassFile.D2I :
+                        current_frame.pop_stack_2(
+                            VerificationType.double2_type,
+                            VerificationType.double_type);
+                        current_frame.push_stack(
+                            VerificationType.integer_type);
+                        no_control_flow = false; break;
+                    case ClassFile.D2L :
+                        current_frame.pop_stack_2(
+                            VerificationType.double2_type,
+                            VerificationType.double_type);
+                        current_frame.push_stack_2(
+                            VerificationType.long_type,
+                            VerificationType.long2_type);
+                        no_control_flow = false; break;
+                    case ClassFile.D2F :
+                        current_frame.pop_stack_2(
+                            VerificationType.double2_type,
+                            VerificationType.double_type);
+                        current_frame.push_stack(
+                            VerificationType.float_type);
+                        no_control_flow = false; break;
+                    case ClassFile.I2B :
+                    case ClassFile.I2C :
+                    case ClassFile.I2S :
+                        current_frame.pop_stack(
+                            VerificationType.integer_type);
+                        current_frame.push_stack(
+                            VerificationType.integer_type);
+                        no_control_flow = false; break;
+                    case ClassFile.LCMP :
+                        current_frame.pop_stack_2(
+                            VerificationType.long2_type,
+                            VerificationType.long_type);
+                        current_frame.pop_stack_2(
+                            VerificationType.long2_type,
+                            VerificationType.long_type);
+                        current_frame.push_stack(
+                            VerificationType.integer_type);
+                        no_control_flow = false; break;
+                    case ClassFile.FCMPL :
+                    case ClassFile.FCMPG :
+                        current_frame.pop_stack(
+                            VerificationType.float_type);
+                        current_frame.pop_stack(
+                            VerificationType.float_type);
+                        current_frame.push_stack(
+                            VerificationType.integer_type);
+                        no_control_flow = false; break;
+                    case ClassFile.DCMPL :
+                    case ClassFile.DCMPG :
+                        current_frame.pop_stack_2(
+                            VerificationType.double2_type,
+                            VerificationType.double_type);
+                        current_frame.pop_stack_2(
+                            VerificationType.double2_type,
+                            VerificationType.double_type);
+                        current_frame.push_stack(
+                            VerificationType.integer_type);
+                        no_control_flow = false; break;
+                    case ClassFile.IF_ICMPEQ:
+                    case ClassFile.IF_ICMPNE:
+                    case ClassFile.IF_ICMPLT:
+                    case ClassFile.IF_ICMPGE:
+                    case ClassFile.IF_ICMPGT:
+                    case ClassFile.IF_ICMPLE:
+                        current_frame.pop_stack(
+                            VerificationType.integer_type);
+                        // fall through
+                    case ClassFile.IFEQ:
+                    case ClassFile.IFNE:
+                    case ClassFile.IFLT:
+                    case ClassFile.IFGE:
+                    case ClassFile.IFGT:
+                    case ClassFile.IFLE:
+                        current_frame.pop_stack(
+                            VerificationType.integer_type);
+                        target = bcs.dest();
+                        stackmap_table.check_jump_target(
+                            current_frame, target);
+                        no_control_flow = false; break;
+                    case ClassFile.IF_ACMPEQ :
+                    case ClassFile.IF_ACMPNE :
+                        current_frame.pop_stack(
+                            VerificationType.reference_check);
+                        // fall through
+                    case ClassFile.IFNULL :
+                    case ClassFile.IFNONNULL :
+                        current_frame.pop_stack(
+                            VerificationType.reference_check);
+                        target = bcs.dest();
+                        stackmap_table.check_jump_target
+                            (current_frame, target);
+                        no_control_flow = false; break;
+                    case ClassFile.GOTO :
+                        target = bcs.dest();
+                        stackmap_table.check_jump_target(
+                            current_frame, target);
+                        no_control_flow = true; break;
+                    case ClassFile.GOTO_W :
+                        target = bcs.destW();
+                        stackmap_table.check_jump_target(
+                            current_frame, target);
+                        no_control_flow = true; break;
+                    case ClassFile.TABLESWITCH :
+                    case ClassFile.LOOKUPSWITCH :
+                        verify_switch(
+                            bcs, code_length, code_data, current_frame,
+                            stackmap_table);
+                        no_control_flow = true; break;
+                    case ClassFile.IRETURN :
+                        type = current_frame.pop_stack(
+                            VerificationType.integer_type);
+                        verify_return_value(return_type, type, bci,
+                                                                current_frame);
+                        no_control_flow = true; break;
+                    case ClassFile.LRETURN :
+                        type2 = current_frame.pop_stack(
+                            VerificationType.long2_type);
+                        type = current_frame.pop_stack(
+                            VerificationType.long_type);
+                        verify_return_value(return_type, type, bci,
+                                                                current_frame);
+                        no_control_flow = true; break;
+                    case ClassFile.FRETURN :
+                        type = current_frame.pop_stack(
+                            VerificationType.float_type);
+                        verify_return_value(return_type, type, bci,
+                                                                current_frame);
+                        no_control_flow = true; break;
+                    case ClassFile.DRETURN :
+                        type2 = current_frame.pop_stack(
+                            VerificationType.double2_type);
+                        type = current_frame.pop_stack(
+                            VerificationType.double_type);
+                        verify_return_value(return_type, type, bci,
+                                                                current_frame);
+                        no_control_flow = true; break;
+                    case ClassFile.ARETURN :
+                        type = current_frame.pop_stack(
+                            VerificationType.reference_check);
+                        verify_return_value(return_type, type, bci,
+                                                                current_frame);
+                        no_control_flow = true; break;
+                    case ClassFile.RETURN:
+                        if (!return_type.is_bogus()) {
+                            verifyError("Method expects a return value");
+                        }
+                        if (object_initializer_name.equals(_method.name()) &&
+                                current_frame.flag_this_uninit()) {
+                            verifyError("Constructor must call super() or this() before return");
+                        }
+                        no_control_flow = true; break;
+                    case ClassFile.GETSTATIC :
+                    case ClassFile.PUTSTATIC :
+                        verify_field_instructions(bcs, current_frame, cp, true);
+                        no_control_flow = false; break;
+                    case ClassFile.GETFIELD :
+                    case ClassFile.PUTFIELD :
+                        verify_field_instructions(bcs, current_frame, cp, false);
+                        no_control_flow = false; break;
+                    case ClassFile.INVOKEVIRTUAL :
+                    case ClassFile.INVOKESPECIAL :
+                    case ClassFile.INVOKESTATIC :
+                        this_uninit = verify_invoke_instructions(bcs, code_length, current_frame, (bci >= ex_minmax[0] && bci < ex_minmax[1]), this_uninit, return_type, cp, stackmap_table);
+                        no_control_flow = false; break;
+                    case ClassFile.INVOKEINTERFACE :
+                    case ClassFile.INVOKEDYNAMIC :
+                        this_uninit = verify_invoke_instructions(bcs, code_length, current_frame, (bci >= ex_minmax[0] && bci < ex_minmax[1]), this_uninit, return_type, cp, stackmap_table);
+                        no_control_flow = false; break;
+                    case ClassFile.NEW :
+                    {
+                        index = bcs.getIndexU2();
+                        verify_cp_class_type(bci, index, cp);
+                        VerificationType new_class_type =
+                            cp_index_to_type(index, cp);
+                        if (!new_class_type.is_object()) {
+                            verifyError("Illegal new instruction");
+                        }
+                        type = VerificationType.uninitialized_type(bci);
+                        current_frame.push_stack(type);
+                        no_control_flow = false; break;
+                    }
+                    case ClassFile.NEWARRAY :
+                        type = get_newarray_type(bcs.getIndex(), bci);
+                        current_frame.pop_stack(
+                            VerificationType.integer_type);
+                        current_frame.push_stack(type);
+                        no_control_flow = false; break;
+                    case ClassFile.ANEWARRAY :
+                        verify_anewarray(bci, bcs.getIndexU2(), cp, current_frame);
+                        no_control_flow = false; break;
+                    case ClassFile.ARRAYLENGTH :
+                        type = current_frame.pop_stack(
+                            VerificationType.reference_check);
+                        if (!(type.is_null() || type.is_array())) {
+                            verifyError("Bad type");
+                        }
+                        current_frame.push_stack(
+                            VerificationType.integer_type);
+                        no_control_flow = false; break;
+                    case ClassFile.CHECKCAST :
+                    {
+                        index = bcs.getIndexU2();
+                        verify_cp_class_type(bci, index, cp);
+                        current_frame.pop_stack(object_type());
+                        VerificationType klass_type = cp_index_to_type(
+                            index, cp);
+                        current_frame.push_stack(klass_type);
+                        no_control_flow = false; break;
+                    }
+                    case ClassFile.INSTANCEOF : {
+                        index = bcs.getIndexU2();
+                        verify_cp_class_type(bci, index, cp);
+                        current_frame.pop_stack(object_type());
+                        current_frame.push_stack(
+                            VerificationType.integer_type);
+                        no_control_flow = false; break;
+                    }
+                    case ClassFile.MONITORENTER :
+                    case ClassFile.MONITOREXIT :
+                        current_frame.pop_stack(
+                            VerificationType.reference_check);
+                        no_control_flow = false; break;
+                    case ClassFile.MULTIANEWARRAY :
+                    {
+                        index = bcs.getIndexU2();
+                        int dim = _method.codeArray()[bcs.bci+3] & 0xff;
+                        verify_cp_class_type(bci, index, cp);
+                        VerificationType new_array_type =
+                            cp_index_to_type(index, cp);
+                        if (!new_array_type.is_array()) {
+                            verifyError("Illegal constant pool index in multianewarray instruction");
+                        }
+                        if (dim < 1 || new_array_type.dimensions(this) < dim) {
+                            verifyError(String.format("Illegal dimension in multianewarray instruction: %d", dim));
+                        }
+                        for (int i = 0; i < dim; i++) {
+                            current_frame.pop_stack(
+                                VerificationType.integer_type);
+                        }
+                        current_frame.push_stack(new_array_type);
+                        no_control_flow = false; break;
+                    }
+                    case ClassFile.ATHROW :
+                        type = VerificationType.reference_type(java_lang_Throwable);
+                        current_frame.pop_stack(type);
+                        no_control_flow = true; break;
+                    default:
+                        verifyError(String.format("Bad instruction: %02x", opcode));
+                }
+            }
+            if (verified_exc_handlers && this_uninit) verifyError("Exception handler targets got verified before this_uninit got set");
+            if (!verified_exc_handlers && bci >= ex_minmax[0] && bci < ex_minmax[1]) {
+                verify_exception_handler_targets(bci, this_uninit, current_frame, stackmap_table);
+            }
+        }
+        if (!no_control_flow) {
+            verifyError("Control flow falls through code end");
+        }
+    }
+
+    private byte[] generate_code_data(ByteBuffer code, int code_length) {
+        byte code_data[] = new byte[code_length];
+        var bcs = new RawBytecodeHelper(code);
+        while (!bcs.isLastBytecode()) {
+            if (bcs.rawNext() != ILLEGAL) {
+                int bci = bcs.bci;
+                if (bcs.rawCode == ClassFile.NEW) {
+                    code_data[bci] = NEW_OFFSET;
+                } else {
+                    code_data[bci] = BYTECODE_OFFSET;
+                }
+            } else {
+                verifyError("Bad instruction");
+            }
+        }
+        return code_data;
+    }
+
+    void verify_exception_handler_table(int code_length, byte[] code_data, int[] minmax) {
+        var cp = _method.constantPool();
+        for (var exhandler : _method.exceptionTable()) {
+            int start_pc = exhandler[0];
+            int end_pc = exhandler[1];
+            int handler_pc = exhandler[2];
+            if (start_pc >= code_length || code_data[start_pc] == 0) {
+                classError(String.format("Illegal exception table start_pc %d", start_pc));
+            }
+            if (end_pc != code_length) {
+                if (end_pc > code_length || code_data[end_pc] == 0) {
+                    classError(String.format("Illegal exception table end_pc %d", end_pc));
+                }
+            }
+            if (handler_pc >= code_length || code_data[handler_pc] == 0) {
+                classError(String.format("Illegal exception table handler_pc %d", handler_pc));
+            }
+            int catch_type_index = exhandler[3];
+            if (catch_type_index != 0) {
+                VerificationType catch_type = cp_index_to_type(catch_type_index, cp);
+                VerificationType throwable = VerificationType.reference_type(java_lang_Throwable);
+                boolean is_subclass = throwable.is_assignable_from(catch_type, this);
+                if (!is_subclass) {
+                    verifyError(String.format("Catch type is not a subclass of Throwable in exception handler %d", handler_pc));
+                }
+            }
+            if (start_pc < minmax[0]) minmax[0] = start_pc;
+            if (end_pc > minmax[1]) minmax[1] = end_pc;
+        }
+    }
+
+    void verify_local_variable_table(int code_length, byte[] code_data) {
+        for (var lvte : _method.localVariableTable()) {
+            int start_bci = lvte.startPc();
+            int length = lvte.length();
+            if (start_bci >= code_length || code_data[start_bci] == 0) {
+                classError(String.format("Illegal local variable table start_pc %d", start_bci));
+            }
+            int end_bci = start_bci + length;
+            if (end_bci != code_length) {
+                if (end_bci >= code_length || code_data[end_bci] == 0) {
+                    classError(String.format("Illegal local variable table length %d", length));
+                }
+            }
+        }
+    }
+
+    int verify_stackmap_table(int stackmap_index, int bci, VerificationFrame current_frame, VerificationTable stackmap_table, boolean no_control_flow) {
+        if (stackmap_index < stackmap_table.get_frame_count()) {
+            int this_offset = stackmap_table.get_offset(stackmap_index);
+            if (no_control_flow && this_offset > bci) {
+                verifyError("Expecting a stack map frame");
+            }
+            if (this_offset == bci) {
+                boolean matches = stackmap_table.match_stackmap(current_frame, this_offset, stackmap_index, !no_control_flow, true);
+                if (!matches) {
+                    verifyError("Instruction type does not match stack map");
+                }
+                stackmap_index++;
+            } else if (this_offset < bci) {
+                classError(String.format("Bad stack map offset %d", this_offset));
+            }
+        } else if (no_control_flow) {
+            verifyError("Expecting a stack map frame");
+        }
+        return stackmap_index;
+    }
+
+    void verify_exception_handler_targets(int bci, boolean this_uninit, VerificationFrame current_frame, VerificationTable stackmap_table) {
+        var cp = _method.constantPool();
+        for(var exhandler : _method.exceptionTable()) {
+            int start_pc = exhandler[0];
+            int end_pc = exhandler[1];
+            int handler_pc = exhandler[2];
+            int catch_type_index = exhandler[3];
+            if(bci >= start_pc && bci < end_pc) {
+                int flags = current_frame.flags();
+                if (this_uninit) {    flags |= FLAG_THIS_UNINIT; }
+                VerificationFrame new_frame = current_frame.frame_in_exception_handler(flags);
+                if (catch_type_index != 0) {
+                    VerificationType catch_type = cp_index_to_type(catch_type_index, cp);
+                    new_frame.push_stack(catch_type);
+                } else {
+                    VerificationType throwable = VerificationType.reference_type(java_lang_Throwable);
+                    new_frame.push_stack(throwable);
+                }
+                boolean matches = stackmap_table.match_stackmap(new_frame, handler_pc, true, false);
+                if (!matches) {
+                    verifyError(String.format("Stack map does not match the one at exception handler %d", handler_pc));
+                }
+            }
+        }
+    }
+
+    void verify_cp_index(int bci, ConstantPoolWrapper cp, int index) {
+        int nconstants = cp.entryCount();
+        if ((index <= 0) || (index >= nconstants)) {
+            verifyError(String.format("Illegal constant pool index %d", index));
+        }
+    }
+
+    void verify_cp_type(int bci, int index, ConstantPoolWrapper cp, int types) {
+        verify_cp_index(bci, cp, index);
+        int tag = cp.tagAt(index);
+        if ((types & (1 << tag))== 0) {
+            verifyError(String.format("Illegal type at constant pool entry %d", index));
+        }
+    }
+
+    void verify_cp_class_type(int bci, int index, ConstantPoolWrapper cp) {
+        verify_cp_index(bci, cp, index);
+        int tag = cp.tagAt(index);
+        if (tag != JVM_CONSTANT_Class) {
+            verifyError(String.format("Illegal type at constant pool entry %d", index));
+        }
+    }
+
+    void verify_ldc(int opcode, int index, VerificationFrame current_frame, ConstantPoolWrapper cp, int bci) {
+        verify_cp_index(bci, cp, index);
+        int tag = cp.tagAt(index);
+        int types = 0;
+        if (opcode == ClassFile.LDC || opcode == ClassFile.LDC_W) {
+            types = (1 << JVM_CONSTANT_Integer) | (1 << JVM_CONSTANT_Float)
+                    | (1 << JVM_CONSTANT_String) | (1 << JVM_CONSTANT_Class)
+                    | (1 << JVM_CONSTANT_MethodHandle) | (1 << JVM_CONSTANT_MethodType)
+                    | (1 << JVM_CONSTANT_Dynamic);
+            verify_cp_type(bci, index, cp, types);
+        } else {
+            if (opcode != ClassFile.LDC2_W) verifyError("must be ldc2_w");
+            types = (1 << JVM_CONSTANT_Double) | (1 << JVM_CONSTANT_Long) | (1 << JVM_CONSTANT_Dynamic);
+            verify_cp_type(bci, index, cp, types);
+        }
+        switch (tag) {
+            case JVM_CONSTANT_Utf8 -> current_frame.push_stack(object_type());
+            case JVM_CONSTANT_String -> current_frame.push_stack(VerificationType.reference_type(java_lang_String));
+            case JVM_CONSTANT_Class -> current_frame.push_stack(VerificationType.reference_type(java_lang_Class));
+            case JVM_CONSTANT_Integer -> current_frame.push_stack(VerificationType.integer_type);
+            case JVM_CONSTANT_Float -> current_frame.push_stack(VerificationType.float_type);
+            case JVM_CONSTANT_Double -> current_frame.push_stack_2(VerificationType.double_type, VerificationType.double2_type);
+            case JVM_CONSTANT_Long -> current_frame.push_stack_2(VerificationType.long_type, VerificationType.long2_type);
+            case JVM_CONSTANT_MethodHandle -> current_frame.push_stack(VerificationType.reference_type(java_lang_invoke_MethodHandle));
+            case JVM_CONSTANT_MethodType -> current_frame.push_stack(VerificationType.reference_type(java_lang_invoke_MethodType));
+            case JVM_CONSTANT_Dynamic -> {
+                String constant_type = cp.dynamicConstantSignatureAt(index);
+                if (!VerificationSignature.isValidTypeSignature(constant_type)) verifyError("Invalid type for dynamic constant");
+                VerificationType[] v_constant_type = new VerificationType[2];
+                var sig_stream = new VerificationSignature(constant_type, false, this);
+                int n = change_sig_to_verificationType(sig_stream, v_constant_type, 0);
+                int opcode_n = (opcode == ClassFile.LDC2_W ? 2 : 1);
+                if (n != opcode_n) {
+                    types &= ~(1 << JVM_CONSTANT_Dynamic);
+                    verify_cp_type(bci, index, cp, types);
+                }
+                for (int i = 0; i < n; i++) {
+                    current_frame.push_stack(v_constant_type[i]);
+                }
+            }
+            default -> verifyError("Invalid index in ldc");
+        }
+    }
+
+    void verify_switch(RawBytecodeHelper bcs, int code_length, byte[] code_data, VerificationFrame current_frame, VerificationTable stackmap_table) {
+        int bci = bcs.bci;
+        int aligned_bci = VerificationBytecodes.align(bci + 1);
+        // 4639449 & 4647081: padding bytes must be 0
+        if (_klass.majorVersion() < NONZERO_PADDING_BYTES_IN_SWITCH_MAJOR_VERSION) {
+            int padding_offset = 1;
+            while ((bci + padding_offset) < aligned_bci) {
+                if (_method.codeArray()[bci + padding_offset] != 0) {
+                    verifyError("Nonzero padding byte in lookupswitch or tableswitch");
+                }
+                padding_offset++;
+            }
+        }
+        int default_ofset = bcs.getInt(aligned_bci);
+        int keys, delta;
+        current_frame.pop_stack(VerificationType.integer_type);
+        if (bcs.rawCode == ClassFile.TABLESWITCH) {
+            int low = bcs.getInt(aligned_bci + 4);
+            int high = bcs.getInt(aligned_bci + 2*4);
+            if (low > high) {
+                verifyError("low must be less than or equal to high in tableswitch");
+            }
+            keys = high - low + 1;
+            if (keys < 0) {
+                verifyError("too many keys in tableswitch");
+            }
+            delta = 1;
+        } else {
+            // Make sure that the lookupswitch items are sorted
+            keys = bcs.getInt(aligned_bci + 4);
+            if (keys < 0) {
+                verifyError("number of keys in lookupswitch less than 0");
+            }
+            delta = 2;
+            for (int i = 0; i < (keys - 1); i++) {
+                int this_key = bcs.getInt(aligned_bci + (2+2*i)*4);
+                int next_key = bcs.getInt(aligned_bci + (2+2*i+2)*4);
+                if (this_key >= next_key) {
+                    verifyError("Bad lookupswitch instruction");
+                }
+            }
+        }
+        int target = bci + default_ofset;
+        stackmap_table.check_jump_target(current_frame, target);
+        for (int i = 0; i < keys; i++) {
+            aligned_bci = VerificationBytecodes.align(bcs.bci + 1);
+            target = bci + bcs.getInt(aligned_bci + (3+i*delta)*4);
+            stackmap_table.check_jump_target(current_frame, target);
+        }
+    }
+
+    void verify_field_instructions(RawBytecodeHelper bcs, VerificationFrame current_frame, ConstantPoolWrapper cp, boolean allow_arrays) {
+        int index = bcs.getIndexU2();
+        verify_cp_type(bcs.bci, index, cp, 1 << JVM_CONSTANT_Fieldref);
+        String field_name = cp.refNameAt(index);
+        String field_sig = cp.refSignatureAt(index);
+        if (!VerificationSignature.isValidTypeSignature(field_sig)) verifyError("Invalid field signature");
+        VerificationType ref_class_type = cp_ref_index_to_type(index, cp);
+        if (!ref_class_type.is_object() &&
+            (!allow_arrays || !ref_class_type.is_array())) {
+            verifyError(String.format("Expecting reference to class in class %s at constant pool index %d", _klass.thisClassName(), index));
+        }
+        VerificationType target_class_type = ref_class_type;
+        VerificationType[] field_type = new VerificationType[2];
+        var sig_stream = new VerificationSignature(field_sig, false, this);
+        VerificationType stack_object_type = null;
+        int n = change_sig_to_verificationType(sig_stream, field_type, 0);
+        boolean is_assignable;
+        switch (bcs.rawCode) {
+            case ClassFile.GETSTATIC ->  {
+                for (int i = 0; i < n; i++) {
+                    current_frame.push_stack(field_type[i]);
+                }
+            }
+            case ClassFile.PUTSTATIC ->  {
+                for (int i = n - 1; i >= 0; i--) {
+                    current_frame.pop_stack(field_type[i]);
+                }
+            }
+            case ClassFile.GETFIELD ->  {
+                stack_object_type = current_frame.pop_stack(
+                    target_class_type);
+                for (int i = 0; i < n; i++) {
+                    current_frame.push_stack(field_type[i]);
+                }
+            }
+            case ClassFile.PUTFIELD ->  {
+                for (int i = n - 1; i >= 0; i--) {
+                    current_frame.pop_stack(field_type[i]);
+                }
+                stack_object_type = current_frame.pop_stack();
+                if (stack_object_type.is_uninitialized_this(this) &&
+                        target_class_type.equals(current_type()) &&
+                        _klass.findField(field_name, field_sig)) {
+                    stack_object_type = current_type();
+                }
+                is_assignable = target_class_type.is_assignable_from(stack_object_type, this);
+                if (!is_assignable) {
+                    verifyError("Bad type on operand stack in putfield");
+                }
+            }
+            default -> verifyError("Should not reach here");
+        }
+    }
+
+    // Return TRUE if all code paths starting with start_bc_offset end in
+    // bytecode athrow or loop.
+    boolean ends_in_athrow(int start_bc_offset) {
+        log_info("unimplemented VerifierImpl.ends_in_athrow");
+        return true;
+    }
+
+    boolean verify_invoke_init(RawBytecodeHelper bcs, int ref_class_index, VerificationType ref_class_type,
+            VerificationFrame current_frame, int code_length, boolean in_try_block,
+            boolean this_uninit, ConstantPoolWrapper cp, VerificationTable stackmap_table) {
+        int bci = bcs.bci;
+        VerificationType type = current_frame.pop_stack(VerificationType.reference_check);
+        if (type.is_uninitialized_this(this)) {
+            String superk_name = current_class().superclassName();
+            if (!current_class().thisClassName().equals(ref_class_type.name()) &&
+                    !superk_name.equals(ref_class_type.name())) {
+                verifyError("Bad <init> method call");
+            }
+            if (in_try_block) {
+                for(var exhandler : _method.exceptionTable()) {
+                    int start_pc = exhandler[0];
+                    int end_pc = exhandler[1];
+
+                    if (bci >= start_pc && bci < end_pc) {
+                        if (!ends_in_athrow(exhandler[2])) {
+                            verifyError("Bad <init> method call from after the start of a try block");
+                        }
+                    }
+                }
+                verify_exception_handler_targets(bci, true, current_frame, stackmap_table);
+            }
+            current_frame.initialize_object(type, current_type());
+            this_uninit = true;
+        } else if (type.is_uninitialized()) {
+            int new_offset = type.bci(this);
+            if (new_offset > (code_length - 3) || (_method.codeArray()[new_offset] & 0xff) != ClassFile.NEW) {
+                verifyError("Expecting new instruction");
+            }
+            int new_class_index = bcs.getIndexU2Raw(new_offset + 1);
+            verify_cp_class_type(bci, new_class_index, cp);
+            VerificationType new_class_type = cp_index_to_type(
+                new_class_index, cp);
+            if (!new_class_type.equals(ref_class_type)) {
+                verifyError("Call to wrong <init> method");
+            }
+            if (in_try_block) {
+                verify_exception_handler_targets(bci, this_uninit, current_frame,
+                                                                                 stackmap_table);
+            }
+            current_frame.initialize_object(type, new_class_type);
+        } else {
+            verifyError("Bad operand type when invoking <init>");
+        }
+        return this_uninit;
+    }
+
+    static boolean is_same_or_direct_interface(VerificationWrapper klass, VerificationType klass_type, VerificationType ref_class_type) {
+        if (ref_class_type.equals(klass_type)) return true;
+        for (String k_name : klass.interfaceNames()) {
+            if (ref_class_type.equals(VerificationType.reference_type(k_name))) {
+                return true;
+            }
+        }
+        return false;
+    }
+
+    boolean verify_invoke_instructions(RawBytecodeHelper bcs, int code_length, VerificationFrame current_frame, boolean in_try_block, boolean this_uninit, VerificationType return_type, ConstantPoolWrapper cp, VerificationTable stackmap_table) {
+        // Make sure the constant pool item is the right type
+        int index = bcs.getIndexU2();
+        int opcode = bcs.rawCode;
+        int types = 0;
+        switch (opcode) {
+            case ClassFile.INVOKEINTERFACE:
+                types = 1 << JVM_CONSTANT_InterfaceMethodref;
+                break;
+            case ClassFile.INVOKEDYNAMIC:
+                types = 1 << JVM_CONSTANT_InvokeDynamic;
+                break;
+            case ClassFile.INVOKESPECIAL:
+            case ClassFile.INVOKESTATIC:
+                types = (_klass.majorVersion() < STATIC_METHOD_IN_INTERFACE_MAJOR_VERSION) ?
+                    (1 << JVM_CONSTANT_Methodref) :
+                    ((1 << JVM_CONSTANT_InterfaceMethodref) | (1 << JVM_CONSTANT_Methodref));
+                break;
+            default:
+                types = 1 << JVM_CONSTANT_Methodref;
+        }
+        verify_cp_type(bcs.bci, index, cp, types);
+        String method_name = cp.refNameAt(index);
+        String method_sig = cp.refSignatureAt(index);
+        if (!VerificationSignature.isValidMethodSignature(method_sig)) verifyError("Invalid method signature");
+        VerificationType ref_class_type = null;
+        if (opcode == ClassFile.INVOKEDYNAMIC) {
+            if (_klass.majorVersion() < INVOKEDYNAMIC_MAJOR_VERSION) {
+                classError(String.format("invokedynamic instructions not supported by this class file version (%d), class %s", _klass.majorVersion(), _klass.thisClassName()));
+            }
+        } else {
+            ref_class_type = cp_ref_index_to_type(index, cp);
+        }
+        String sig = cp.refSignatureAt(index);
+        sig_as_verification_types mth_sig_verif_types;
+        ArrayList<VerificationType> verif_types = new ArrayList<>(10);
+        mth_sig_verif_types = new sig_as_verification_types(verif_types);
+        create_method_sig_entry(mth_sig_verif_types, sig);
+        int nargs = mth_sig_verif_types.num_args();
+        int bci = bcs.bci;
+        if (opcode == ClassFile.INVOKEINTERFACE) {
+            if ((_method.codeArray()[bci+3] & 0xff) != (nargs+1)) {
+                verifyError("Inconsistent args count operand in invokeinterface");
+            }
+            if ((_method.codeArray()[bci+4] & 0xff) != 0) {
+                verifyError("Fourth operand byte of invokeinterface must be zero");
+            }
+        }
+        if (opcode == ClassFile.INVOKEDYNAMIC) {
+            if ((_method.codeArray()[bci+3] & 0xff) != 0 || (_method.codeArray()[bci+4] & 0xff) != 0) {
+                verifyError("Third and fourth operand bytes of invokedynamic must be zero");
+            }
+        }
+        if (method_name.charAt(0) == JVM_SIGNATURE_SPECIAL) {
+            if (opcode != ClassFile.INVOKESPECIAL ||
+                !object_initializer_name.equals(method_name)) {
+                verifyError("Illegal call to internal method");
+            }
+        } else if (opcode == ClassFile.INVOKESPECIAL
+                             && !is_same_or_direct_interface(current_class(), current_type(), ref_class_type)
+                             && !ref_class_type.equals(VerificationType.reference_type(
+                                        current_class().superclassName()))) {
+            boolean have_imr_indirect = cp.tagAt(index) == JVM_CONSTANT_InterfaceMethodref;
+            boolean subtype = ref_class_type.is_assignable_from(current_type(), this);
+            if (!subtype) {
+                verifyError("Bad invokespecial instruction: current class isn't assignable to reference class.");
+            } else if (have_imr_indirect) {
+                verifyError("Bad invokespecial instruction: interface method reference is in an indirect superinterface.");
+            }
+
+        }
+        ArrayList<VerificationType> sig_verif_types = mth_sig_verif_types.sig_verif_types();
+        if (sig_verif_types == null) verifyError("Missing signature's array of verification types");
+        for (int i = nargs - 1; i >= 0; i--) { // Run backwards
+            current_frame.pop_stack(sig_verif_types.get(i));
+        }
+        if (opcode != ClassFile.INVOKESTATIC &&
+            opcode != ClassFile.INVOKEDYNAMIC) {
+            if (object_initializer_name.equals(method_name)) {    // <init> method
+                this_uninit = verify_invoke_init(bcs, index, ref_class_type, current_frame,
+                    code_length, in_try_block, this_uninit, cp, stackmap_table);
+            } else {
+                switch (opcode) {
+                    case ClassFile.INVOKESPECIAL ->
+                        current_frame.pop_stack(current_type());
+                    case ClassFile.INVOKEVIRTUAL -> {
+                        VerificationType stack_object_type =
+                                current_frame.pop_stack(ref_class_type);
+                        if (current_type() != stack_object_type) {
+                            cp.classNameAt(cp.refClassIndexAt(index));
+                        }
+                    }
+                    default -> {
+                        if (opcode != ClassFile.INVOKEINTERFACE)
+                            verifyError("Unexpected opcode encountered");
+                        current_frame.pop_stack(ref_class_type);
+                    }
+                }
+            }
+        }
+        int sig_verif_types_len = sig_verif_types.size();
+        if (sig_verif_types_len > nargs) {    // There's a return type
+            if (object_initializer_name.equals(method_name)) {
+                verifyError("Return type must be void in <init> method");
+            }
+
+            if (sig_verif_types_len > nargs + 2) verifyError("Signature verification types array return type is bogus");
+            for (int i = nargs; i < sig_verif_types_len; i++) {
+                if (!(i == nargs || sig_verif_types.get(i).is_long2() || sig_verif_types.get(i).is_double2())) verifyError("Unexpected return verificationType");
+                current_frame.push_stack(sig_verif_types.get(i));
+            }
+        }
+        return this_uninit;
+    }
+
+    VerificationType get_newarray_type(int index, int bci) {
+        String[] from_bt = new String[] {
+            null, null, null, null, "[Z", "[C", "[F", "[D", "[B", "[S", "[I", "[J",
+        };
+        if (index < T_BOOLEAN.type || index > T_LONG.type) {
+            verifyError("Illegal newarray instruction");
+        }
+        String sig = from_bt[index];
+        return VerificationType.reference_type(sig);
+    }
+
+    void verify_anewarray(int bci, int index, ConstantPoolWrapper cp, VerificationFrame current_frame) {
+        verify_cp_class_type(bci, index, cp);
+        current_frame.pop_stack(VerificationType.integer_type);
+        VerificationType component_type = cp_index_to_type(index, cp);
+        int length;
+        String arr_sig_str;
+        if (component_type.is_array()) {         // it's an array
+            String component_name = component_type.name();
+            length = component_name.length();
+            if (length > MAX_ARRAY_DIMENSIONS &&
+                    component_name.charAt(MAX_ARRAY_DIMENSIONS - 1) == JVM_SIGNATURE_ARRAY) {
+                verifyError("Illegal anewarray instruction, array has more than 255 dimensions");
+            }
+            length++;
+            arr_sig_str = String.format("%c%s", JVM_SIGNATURE_ARRAY, component_name);
+            if (arr_sig_str.length() != length) verifyError("Unexpected number of characters in string");
+        } else {                 // it's an object or interface
+            String component_name = component_type.name();
+            length = component_name.length() + 3;
+            arr_sig_str = String.format("%c%c%s;", JVM_SIGNATURE_ARRAY, JVM_SIGNATURE_CLASS, component_name);
+            if (arr_sig_str.length() != length) verifyError("Unexpected number of characters in string");
+        }
+        VerificationType new_array_type = VerificationType.reference_type(arr_sig_str);
+        current_frame.push_stack(new_array_type);
+    }
+
+    void verify_iload(int index, VerificationFrame current_frame) {
+        current_frame.get_local(
+            index, VerificationType.integer_type);
+        current_frame.push_stack(
+            VerificationType.integer_type);
+    }
+
+    void verify_lload(int index, VerificationFrame current_frame) {
+        current_frame.get_local_2(
+            index, VerificationType.long_type,
+            VerificationType.long2_type);
+        current_frame.push_stack_2(
+            VerificationType.long_type,
+            VerificationType.long2_type);
+    }
+
+    void verify_fload(int index, VerificationFrame current_frame) {
+        current_frame.get_local(
+            index, VerificationType.float_type);
+        current_frame.push_stack(
+            VerificationType.float_type);
+    }
+
+    void verify_dload(int index, VerificationFrame current_frame) {
+        current_frame.get_local_2(
+            index, VerificationType.double_type,
+            VerificationType.double2_type);
+        current_frame.push_stack_2(
+            VerificationType.double_type,
+            VerificationType.double2_type);
+    }
+
+    void verify_aload(int index, VerificationFrame current_frame) {
+        VerificationType type = current_frame.get_local(
+            index, VerificationType.reference_check);
+        current_frame.push_stack(type);
+    }
+
+    void verify_istore(int index, VerificationFrame current_frame) {
+        current_frame.pop_stack(
+            VerificationType.integer_type);
+        current_frame.set_local(
+            index, VerificationType.integer_type);
+    }
+
+    void verify_lstore(int index, VerificationFrame current_frame) {
+        current_frame.pop_stack_2(
+            VerificationType.long2_type,
+            VerificationType.long_type);
+        current_frame.set_local_2(
+            index, VerificationType.long_type,
+            VerificationType.long2_type);
+    }
+
+    void verify_fstore(int index, VerificationFrame current_frame) {
+        current_frame.pop_stack(
+            VerificationType.float_type);
+        current_frame.set_local(
+            index, VerificationType.float_type);
+    }
+
+    void verify_dstore(int index, VerificationFrame current_frame) {
+        current_frame.pop_stack_2(
+            VerificationType.double2_type,
+            VerificationType.double_type);
+        current_frame.set_local_2(
+            index, VerificationType.double_type,
+            VerificationType.double2_type);
+    }
+
+    void verify_astore(int index, VerificationFrame current_frame) {
+        VerificationType type = current_frame.pop_stack(
+            VerificationType.reference_check);
+        current_frame.set_local(index, type);
+    }
+
+    void verify_iinc(int index, VerificationFrame current_frame) {
+        VerificationType type = current_frame.get_local(
+            index, VerificationType.integer_type);
+        current_frame.set_local(index, type);
+    }
+
+    void verify_return_value(VerificationType return_type, VerificationType type, int bci, VerificationFrame current_frame) {
+        if (return_type.is_bogus()) {
+            verifyError("Method expects a return value");
+        }
+        boolean match = return_type.is_assignable_from(type, this);
+        if (!match) {
+            verifyError("Bad return type");
+        }
+    }
+
+    private void dumpMethod() {
+        if (_logger != null) ClassPrinter.toTree(_method.m, ClassPrinter.Verbosity.CRITICAL_ATTRIBUTES).toYaml(_logger);
+    }
+
+    void verifyError(String msg) {
+        dumpMethod();
+        throw new VerifyError(String.format("%s in %s::%s(%s) @%d %s", msg, _klass.thisClassName(), _method.name(), _method.parameters(), bci, errorContext).trim());
+    }
+
+    void verifyError(String msg, VerificationFrame from, VerificationFrame target) {
+        dumpMethod();
+        throw new VerifyError(String.format("%s in %s::%s(%s) @%d %s%n  while assigning %s%n  to %s", msg, _klass.thisClassName(), _method.name(), _method.parameters(), bci, errorContext, from, target));
+    }
+
+    void classError(String msg) {
+        dumpMethod();
+        throw new VerifyError(String.format("%s in %s::%s(%s)", msg, _klass.thisClassName(), _method.name(), _method.parameters()));
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/constant/ConstantUtils.class b/tests/test_data/std/jdk/internal/constant/ConstantUtils.class
new file mode 100644
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diff --git a/tests/test_data/std/jdk/internal/constant/ConstantUtils.java b/tests/test_data/std/jdk/internal/constant/ConstantUtils.java
new file mode 100644
index 00000000..7c676a44
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/constant/ConstantUtils.java
@@ -0,0 +1,322 @@
+/*
+ * Copyright (c) 2018, 2024, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package jdk.internal.constant;
+
+import sun.invoke.util.Wrapper;
+
+import java.lang.constant.ClassDesc;
+import java.lang.constant.ConstantDesc;
+import java.lang.constant.ConstantDescs;
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Set;
+
+/**
+ * Helper methods for the implementation of {@code java.lang.constant}.
+ */
+public final class ConstantUtils {
+    /** an empty constant descriptor */
+    public static final ConstantDesc[] EMPTY_CONSTANTDESC = new ConstantDesc[0];
+    public static final ClassDesc[] EMPTY_CLASSDESC = new ClassDesc[0];
+    public static final int MAX_ARRAY_TYPE_DESC_DIMENSIONS = 255;
+
+    private static final Set<String> pointyNames = Set.of(ConstantDescs.INIT_NAME, ConstantDescs.CLASS_INIT_NAME);
+
+    /** No instantiation */
+    private ConstantUtils() {}
+
+    /**
+     * Validates the correctness of a binary class name. In particular checks for the presence of
+     * invalid characters in the name.
+     *
+     * @param name the class name
+     * @return the class name passed if valid
+     * @throws IllegalArgumentException if the class name is invalid
+     * @throws NullPointerException if class name is {@code null}
+     */
+    public static String validateBinaryClassName(String name) {
+        for (int i = 0; i < name.length(); i++) {
+            char ch = name.charAt(i);
+            if (ch == ';' || ch == '[' || ch == '/')
+                throw new IllegalArgumentException("Invalid class name: " + name);
+        }
+        return name;
+    }
+
+    /**
+     * Validates the correctness of an internal class name.
+     * In particular checks for the presence of invalid characters in the name.
+     *
+     * @param name the class name
+     * @return the class name passed if valid
+     * @throws IllegalArgumentException if the class name is invalid
+     * @throws NullPointerException if class name is {@code null}
+     */
+    public static String validateInternalClassName(String name) {
+        for (int i = 0; i < name.length(); i++) {
+            char ch = name.charAt(i);
+            if (ch == ';' || ch == '[' || ch == '.')
+                throw new IllegalArgumentException("Invalid class name: " + name);
+        }
+        return name;
+    }
+
+    /**
+     * Validates the correctness of a binary package name.
+     * In particular checks for the presence of invalid characters in the name.
+     * Empty package name is allowed.
+     *
+     * @param name the package name
+     * @return the package name passed if valid
+     * @throws IllegalArgumentException if the package name is invalid
+     * @throws NullPointerException if the package name is {@code null}
+     */
+    public static String validateBinaryPackageName(String name) {
+        for (int i = 0; i < name.length(); i++) {
+            char ch = name.charAt(i);
+            if (ch == ';' || ch == '[' || ch == '/')
+                throw new IllegalArgumentException("Invalid package name: " + name);
+        }
+        return name;
+    }
+
+    /**
+     * Validates the correctness of an internal package name.
+     * In particular checks for the presence of invalid characters in the name.
+     * Empty package name is allowed.
+     *
+     * @param name the package name
+     * @return the package name passed if valid
+     * @throws IllegalArgumentException if the package name is invalid
+     * @throws NullPointerException if the package name is {@code null}
+     */
+    public static String validateInternalPackageName(String name) {
+        for (int i = 0; i < name.length(); i++) {
+            char ch = name.charAt(i);
+            if (ch == ';' || ch == '[' || ch == '.')
+                throw new IllegalArgumentException("Invalid package name: " + name);
+        }
+        return name;
+    }
+
+    /**
+     * Validates the correctness of a module name.
+     * In particular checks for the presence of invalid characters in the name.
+     * Empty module name is allowed.
+     *
+     * {@jvms 4.2.3} Module and Package Names
+     *
+     * @param name the module name
+     * @return the module name passed if valid
+     * @throws IllegalArgumentException if the module name is invalid
+     * @throws NullPointerException if the module name is {@code null}
+     */
+    public static String validateModuleName(String name) {
+        for (int i = name.length() - 1; i >= 0; i--) {
+            char ch = name.charAt(i);
+            if ((ch >= '\u0000' && ch <= '\u001F')
+            || ((ch == '\\' || ch == ':' || ch =='@') && (i == 0 || name.charAt(--i) != '\\')))
+                throw new IllegalArgumentException("Invalid module name: " + name);
+        }
+        return name;
+    }
+
+    /**
+     * Validates a member name
+     *
+     * @param name the name of the member
+     * @return the name passed if valid
+     * @throws IllegalArgumentException if the member name is invalid
+     * @throws NullPointerException if the member name is {@code null}
+     */
+    public static String validateMemberName(String name, boolean method) {
+        int len = name.length();
+        if (len == 0)
+            throw new IllegalArgumentException("zero-length member name");
+        for (int i = 0; i < len; i++) {
+            char ch = name.charAt(i);
+            // common case fast-path
+            if ((ch >= 'a' && ch <= 'z') || (ch >= 'A' && ch <= 'Z'))
+                continue;
+            if (ch == '.' || ch == ';' || ch == '[' || ch == '/')
+                throw new IllegalArgumentException("Invalid member name: " + name);
+            if (method && (ch == '<' || ch == '>')) {
+                if (!pointyNames.contains(name))
+                    throw new IllegalArgumentException("Invalid member name: " + name);
+            }
+        }
+        return name;
+    }
+
+    public static void validateClassOrInterface(ClassDesc classDesc) {
+        if (!classDesc.isClassOrInterface())
+            throw new IllegalArgumentException("not a class or interface type: " + classDesc);
+    }
+
+    public static int arrayDepth(String descriptorString) {
+        int depth = 0;
+        while (descriptorString.charAt(depth) == '[')
+            depth++;
+        return depth;
+    }
+
+    public static String binaryToInternal(String name) {
+        return name.replace('.', '/');
+    }
+
+    public static String internalToBinary(String name) {
+        return name.replace('/', '.');
+    }
+
+    public static String dropFirstAndLastChar(String s) {
+        return s.substring(1, s.length() - 1);
+    }
+
+    /**
+     * Parses a method descriptor string, and return a list of field descriptor
+     * strings, return type first, then parameter types
+     *
+     * @param descriptor the descriptor string
+     * @return the list of types
+     * @throws IllegalArgumentException if the descriptor string is not valid
+     */
+    public static List<ClassDesc> parseMethodDescriptor(String descriptor) {
+        int cur = 0, end = descriptor.length();
+        ArrayList<ClassDesc> ptypes = new ArrayList<>();
+        ptypes.add(null); // placeholder for return type
+
+        if (cur >= end || descriptor.charAt(cur) != '(')
+            throw new IllegalArgumentException("Bad method descriptor: " + descriptor);
+
+        ++cur;  // skip '('
+        while (cur < end && descriptor.charAt(cur) != ')') {
+            int len = skipOverFieldSignature(descriptor, cur, end, false);
+            if (len == 0)
+                throw new IllegalArgumentException("Bad method descriptor: " + descriptor);
+            ptypes.add(resolveClassDesc(descriptor, cur, len));
+            cur += len;
+        }
+        if (cur >= end)
+            throw new IllegalArgumentException("Bad method descriptor: " + descriptor);
+        ++cur;  // skip ')'
+
+        int rLen = skipOverFieldSignature(descriptor, cur, end, true);
+        if (rLen == 0 || cur + rLen != end)
+            throw new IllegalArgumentException("Bad method descriptor: " + descriptor);
+        ptypes.set(0, resolveClassDesc(descriptor, cur, rLen));
+        return ptypes;
+    }
+
+    private static ClassDesc resolveClassDesc(String descriptor, int start, int len) {
+        if (len == 1) {
+            return Wrapper.forPrimitiveType(descriptor.charAt(start)).classDescriptor();
+        }
+        // Pre-verified in parseMethodDescriptor; avoid redundant verification
+        return ReferenceClassDescImpl.ofValidated(descriptor.substring(start, start + len));
+    }
+
+    private static final char JVM_SIGNATURE_ARRAY = '[';
+    private static final char JVM_SIGNATURE_BYTE = 'B';
+    private static final char JVM_SIGNATURE_CHAR = 'C';
+    private static final char JVM_SIGNATURE_CLASS = 'L';
+    private static final char JVM_SIGNATURE_ENDCLASS = ';';
+    private static final char JVM_SIGNATURE_ENUM = 'E';
+    private static final char JVM_SIGNATURE_FLOAT = 'F';
+    private static final char JVM_SIGNATURE_DOUBLE = 'D';
+    private static final char JVM_SIGNATURE_FUNC = '(';
+    private static final char JVM_SIGNATURE_ENDFUNC = ')';
+    private static final char JVM_SIGNATURE_INT = 'I';
+    private static final char JVM_SIGNATURE_LONG = 'J';
+    private static final char JVM_SIGNATURE_SHORT = 'S';
+    private static final char JVM_SIGNATURE_VOID = 'V';
+    private static final char JVM_SIGNATURE_BOOLEAN = 'Z';
+
+    /**
+     * Validates that the characters at [start, end) within the provided string
+     * describe a valid field type descriptor.
+     * @param descriptor the descriptor string
+     * @param start the starting index into the string
+     * @param end the ending index within the string
+     * @param voidOK is void acceptable?
+     * @return the length of the descriptor, or 0 if it is not a descriptor
+     * @throws IllegalArgumentException if the descriptor string is not valid
+     */
+    @SuppressWarnings("fallthrough")
+    static int skipOverFieldSignature(String descriptor, int start, int end, boolean voidOK) {
+        int arrayDim = 0;
+        int index = start;
+        while (index < end) {
+            switch (descriptor.charAt(index)) {
+                case JVM_SIGNATURE_VOID: if (!voidOK) { return 0; }
+                case JVM_SIGNATURE_BOOLEAN:
+                case JVM_SIGNATURE_BYTE:
+                case JVM_SIGNATURE_CHAR:
+                case JVM_SIGNATURE_SHORT:
+                case JVM_SIGNATURE_INT:
+                case JVM_SIGNATURE_FLOAT:
+                case JVM_SIGNATURE_LONG:
+                case JVM_SIGNATURE_DOUBLE:
+                    return index - start + 1;
+                case JVM_SIGNATURE_CLASS:
+                    // state variable for detection of illegal states, such as:
+                    // empty unqualified name, '//', leading '/', or trailing '/'
+                    boolean legal = false;
+                    while (++index < end) {
+                        switch (descriptor.charAt(index)) {
+                            case ';' -> {
+                                // illegal state on parser exit indicates empty unqualified name or trailing '/'
+                                return legal ? index - start + 1 : 0;
+                            }
+                            case '.', '[' -> {
+                                // do not permit '.' or '['
+                                return 0;
+                            }
+                            case '/' -> {
+                                // illegal state when received '/' indicates '//' or leading '/'
+                                if (!legal) return 0;
+                                legal = false;
+                            }
+                            default ->
+                                legal = true;
+                        }
+                    }
+                    return 0;
+                case JVM_SIGNATURE_ARRAY:
+                    arrayDim++;
+                    if (arrayDim > MAX_ARRAY_TYPE_DESC_DIMENSIONS) {
+                        throw new IllegalArgumentException(String.format("Cannot create an array type descriptor with more than %d dimensions",
+                                ConstantUtils.MAX_ARRAY_TYPE_DESC_DIMENSIONS));
+                    }
+                    // The rest of what's there better be a legal descriptor
+                    index++;
+                    voidOK = false;
+                    break;
+                default:
+                    return 0;
+            }
+        }
+        return 0;
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/constant/DirectMethodHandleDescImpl$1.class b/tests/test_data/std/jdk/internal/constant/DirectMethodHandleDescImpl$1.class
new file mode 100644
index 0000000000000000000000000000000000000000..59841e1e2ddab509c09ef5048550bb78dda8974d
GIT binary patch
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diff --git a/tests/test_data/std/jdk/internal/constant/DirectMethodHandleDescImpl.class b/tests/test_data/std/jdk/internal/constant/DirectMethodHandleDescImpl.class
new file mode 100644
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GIT binary patch
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HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/constant/DirectMethodHandleDescImpl.java b/tests/test_data/std/jdk/internal/constant/DirectMethodHandleDescImpl.java
new file mode 100644
index 00000000..0097ed6b
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/constant/DirectMethodHandleDescImpl.java
@@ -0,0 +1,205 @@
+/*
+ * Copyright (c) 2018, 2024, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package jdk.internal.constant;
+
+import java.lang.constant.ClassDesc;
+import java.lang.constant.DirectMethodHandleDesc;
+import java.lang.constant.MethodTypeDesc;
+import java.lang.invoke.MethodHandle;
+import java.lang.invoke.MethodHandles;
+import java.lang.invoke.MethodType;
+import java.util.Objects;
+
+import static java.lang.constant.ConstantDescs.CD_void;
+import static java.lang.constant.DirectMethodHandleDesc.Kind.CONSTRUCTOR;
+import static java.util.Objects.requireNonNull;
+import static jdk.internal.constant.ConstantUtils.validateClassOrInterface;
+import static jdk.internal.constant.ConstantUtils.validateMemberName;
+
+/**
+ * A <a href="package-summary.html#nominal">nominal descriptor</a> for a direct
+ * {@link MethodHandle}.  A {@linkplain DirectMethodHandleDescImpl} corresponds to
+ * a {@code Constant_MethodHandle_info} entry in the constant pool of a classfile.
+ */
+public final class DirectMethodHandleDescImpl implements DirectMethodHandleDesc {
+
+    private final Kind kind;
+    private final ClassDesc owner;
+    private final String name;
+    private final MethodTypeDesc invocationType;
+
+    /**
+     * Constructs a {@linkplain DirectMethodHandleDescImpl} for a method or field
+     * from a kind, owner, name, and type
+     *
+     * @param kind the kind of the method handle
+     * @param owner the declaring class or interface for the method
+     * @param name the unqualified name of the method (ignored if {@code kind} is {@code CONSTRUCTOR})
+     * @param type the lookup type of the method
+     * @throws NullPointerException if any non-ignored argument is null
+     * @throws IllegalArgumentException if {@code kind} describes a field accessor,
+     * and {@code type} is not consistent with that kind of field accessor, or if
+     * {@code kind} describes a constructor, and the return type of {@code type}
+     * is not {@code void}
+     * @jvms 4.2.2 Unqualified Names
+     */
+    public DirectMethodHandleDescImpl(Kind kind, ClassDesc owner, String name, MethodTypeDesc type) {
+        if (kind == CONSTRUCTOR)
+            name = "<init>";
+
+        requireNonNull(kind);
+        validateClassOrInterface(owner);
+        validateMemberName(name, true);
+        requireNonNull(type);
+
+        switch (kind) {
+            case CONSTRUCTOR   -> validateConstructor(type);
+            case GETTER        -> validateFieldType(type, false, true);
+            case SETTER        -> validateFieldType(type, true, true);
+            case STATIC_GETTER -> validateFieldType(type, false, false);
+            case STATIC_SETTER -> validateFieldType(type, true, false);
+        }
+
+        this.kind = kind;
+        this.owner = owner;
+        this.name = name;
+        this.invocationType = switch (kind) {
+            case VIRTUAL, SPECIAL, INTERFACE_VIRTUAL, INTERFACE_SPECIAL -> type.insertParameterTypes(0, owner);
+            case CONSTRUCTOR -> type.changeReturnType(owner);
+            default -> type;
+        };
+    }
+
+    private static void validateFieldType(MethodTypeDesc type, boolean isSetter, boolean isVirtual) {
+        boolean isVoid = type.returnType().descriptorString().equals("V");
+        int expectedParams = (isSetter ? 1 : 0) + (isVirtual ? 1 : 0);
+        if (isVoid != isSetter
+            || type.parameterCount() != expectedParams
+            || (isVirtual && type.parameterType(0).isPrimitive())) {
+            String expectedType = String.format("(%s%s)%s", (isVirtual ? "R" : ""),
+                                                (isSetter ? "T" : ""), (isSetter ? "V" : "T"));
+            throw new IllegalArgumentException(String.format("Expected type of %s for getter, found %s", expectedType, type));
+        }
+    }
+
+    private static void validateConstructor(MethodTypeDesc type) {
+        if (!type.returnType().descriptorString().equals("V")) {
+            throw new IllegalArgumentException(String.format("Expected type of (T*)V for constructor, found %s", type));
+        }
+    }
+
+    @Override
+    public Kind kind() { return kind; }
+
+    @Override
+    public int refKind() { return kind.refKind; }
+
+    @Override
+    public boolean isOwnerInterface() { return kind.isInterface; }
+
+    @Override
+    public ClassDesc owner() {
+        return owner;
+    }
+
+    @Override
+    public String methodName() {
+        return name;
+    }
+
+    @Override
+    public MethodTypeDesc invocationType() {
+        return invocationType;
+    }
+
+    @Override
+    public String lookupDescriptor() {
+        return switch (kind) {
+            case VIRTUAL,
+                 SPECIAL,
+                 INTERFACE_VIRTUAL,
+                 INTERFACE_SPECIAL        -> invocationType.dropParameterTypes(0, 1).descriptorString();
+            case STATIC,
+                 INTERFACE_STATIC         -> invocationType.descriptorString();
+            case CONSTRUCTOR              -> invocationType.changeReturnType(CD_void).descriptorString();
+            case GETTER,
+                 STATIC_GETTER            -> invocationType.returnType().descriptorString();
+            case SETTER                   -> invocationType.parameterType(1).descriptorString();
+            case STATIC_SETTER            -> invocationType.parameterType(0).descriptorString();
+            default -> throw new IllegalStateException(kind.toString());
+        };
+    }
+
+    public MethodHandle resolveConstantDesc(MethodHandles.Lookup lookup)
+            throws ReflectiveOperationException {
+        Class<?> resolvedOwner = owner.resolveConstantDesc(lookup);
+        MethodType invocationType = this.invocationType().resolveConstantDesc(lookup);
+        return switch (kind) {
+            case STATIC,
+                 INTERFACE_STATIC           -> lookup.findStatic(resolvedOwner, name, invocationType);
+            case VIRTUAL,
+                 INTERFACE_VIRTUAL          -> lookup.findVirtual(resolvedOwner, name, invocationType.dropParameterTypes(0, 1));
+            case SPECIAL,
+                 INTERFACE_SPECIAL          -> lookup.findSpecial(resolvedOwner, name, invocationType.dropParameterTypes(0, 1), lookup.lookupClass());
+            case CONSTRUCTOR                -> lookup.findConstructor(resolvedOwner, invocationType.changeReturnType(void.class));
+            case GETTER                     -> lookup.findGetter(resolvedOwner, name, invocationType.returnType());
+            case STATIC_GETTER              -> lookup.findStaticGetter(resolvedOwner, name, invocationType.returnType());
+            case SETTER                     -> lookup.findSetter(resolvedOwner, name, invocationType.parameterType(1));
+            case STATIC_SETTER              -> lookup.findStaticSetter(resolvedOwner, name, invocationType.parameterType(0));
+            default -> throw new IllegalStateException(kind.name());
+        };
+    }
+
+    /**
+     * Returns {@code true} if this {@linkplain DirectMethodHandleDescImpl} is
+     * equal to another {@linkplain DirectMethodHandleDescImpl}.  Equality is
+     * determined by the two descriptors having equal kind, owner, name, and type
+     * descriptor.
+     * @param o a {@code DirectMethodHandleDescImpl} to compare to this
+     *       {@code DirectMethodHandleDescImpl}
+     * @return {@code true} if the specified {@code DirectMethodHandleDescImpl}
+     *      is equal to this {@code DirectMethodHandleDescImpl}.
+     */
+    @Override
+    public boolean equals(Object o) {
+        if (this == o) return true;
+        if (o == null || getClass() != o.getClass()) return false;
+        DirectMethodHandleDescImpl desc = (DirectMethodHandleDescImpl) o;
+        return kind == desc.kind &&
+               Objects.equals(owner, desc.owner) &&
+               Objects.equals(name, desc.name) &&
+               Objects.equals(invocationType, desc.invocationType);
+    }
+
+    @Override
+    public int hashCode() {
+        return Objects.hash(kind, owner, name, invocationType);
+    }
+
+    @Override
+    public String toString() {
+        return String.format("MethodHandleDesc[%s/%s::%s%s]", kind, owner.displayName(), name, invocationType.displayDescriptor());
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/constant/MethodTypeDescImpl$1.class b/tests/test_data/std/jdk/internal/constant/MethodTypeDescImpl$1.class
new file mode 100644
index 0000000000000000000000000000000000000000..67199a47caace852fb59f37bac95d3f2fa18cedb
GIT binary patch
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diff --git a/tests/test_data/std/jdk/internal/constant/MethodTypeDescImpl.class b/tests/test_data/std/jdk/internal/constant/MethodTypeDescImpl.class
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diff --git a/tests/test_data/std/jdk/internal/constant/MethodTypeDescImpl.java b/tests/test_data/std/jdk/internal/constant/MethodTypeDescImpl.java
new file mode 100644
index 00000000..0a75416f
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/constant/MethodTypeDescImpl.java
@@ -0,0 +1,266 @@
+/*
+ * Copyright (c) 2018, 2024, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package jdk.internal.constant;
+
+import jdk.internal.vm.annotation.Stable;
+
+import java.lang.constant.ClassDesc;
+import java.lang.constant.MethodTypeDesc;
+import java.lang.invoke.MethodHandles;
+import java.lang.invoke.MethodType;
+import java.security.AccessController;
+import java.security.PrivilegedAction;
+import java.util.Arrays;
+import java.util.List;
+import java.util.Objects;
+
+import static java.util.Objects.requireNonNull;
+
+/**
+ * A <a href="package-summary.html#nominal">nominal descriptor</a> for a
+ * {@link MethodType}.  A {@linkplain MethodTypeDescImpl} corresponds to a
+ * {@code Constant_MethodType_info} entry in the constant pool of a classfile.
+ */
+public final class MethodTypeDescImpl implements MethodTypeDesc {
+    private final ClassDesc returnType;
+    private final @Stable ClassDesc[] argTypes;
+    private @Stable String cachedDescriptorString;
+
+    /**
+     * Constructs a {@linkplain MethodTypeDesc} with the specified return type
+     * and a trusted and already-validated parameter types array.
+     *
+     * @param returnType a {@link ClassDesc} describing the return type
+     * @param validatedArgTypes {@link ClassDesc}s describing the trusted and validated parameter types
+     */
+    private MethodTypeDescImpl(ClassDesc returnType, ClassDesc[] validatedArgTypes) {
+        this.returnType = returnType;
+        this.argTypes = validatedArgTypes;
+    }
+
+    /**
+     * Constructs a {@linkplain MethodTypeDesc} with the specified return type
+     * and a trusted parameter types array, which will be validated.
+     *
+     * @param returnType a {@link ClassDesc} describing the return type
+     * @param trustedArgTypes {@link ClassDesc}s describing the trusted parameter types
+     */
+    public static MethodTypeDescImpl ofTrusted(ClassDesc returnType, ClassDesc[] trustedArgTypes) {
+        requireNonNull(returnType);
+        // implicit null checks of trustedArgTypes and all elements
+        for (ClassDesc cd : trustedArgTypes) {
+            validateArgument(cd);
+        }
+        return ofValidated(returnType, trustedArgTypes);
+    }
+
+    private static ClassDesc validateArgument(ClassDesc arg) {
+        if (arg.descriptorString().charAt(0) == 'V') // implicit null check
+            throw new IllegalArgumentException("Void parameters not permitted");
+        return arg;
+    }
+
+    /**
+     * Constructs a {@linkplain MethodTypeDesc} with the specified pre-validated return type
+     * and a pre-validated trusted parameter types array.
+     *
+     * @param returnType a {@link ClassDesc} describing the return type
+     * @param trustedArgTypes {@link ClassDesc}s describing the trusted parameter types
+     */
+    public static MethodTypeDescImpl ofValidated(ClassDesc returnType, ClassDesc... trustedArgTypes) {
+        if (trustedArgTypes.length == 0)
+            return new MethodTypeDescImpl(returnType, ConstantUtils.EMPTY_CLASSDESC);
+        return new MethodTypeDescImpl(returnType, trustedArgTypes);
+    }
+
+    /**
+     * Creates a {@linkplain MethodTypeDescImpl} given a method descriptor string.
+     *
+     * @param descriptor the method descriptor string
+     * @return a {@linkplain MethodTypeDescImpl} describing the desired method type
+     * @throws IllegalArgumentException if the descriptor string is not a valid
+     * method descriptor
+     * @jvms 4.3.3 Method Descriptors
+     */
+    public static MethodTypeDescImpl ofDescriptor(String descriptor) {
+        // Implicit null-check of descriptor
+        List<ClassDesc> ptypes = ConstantUtils.parseMethodDescriptor(descriptor);
+        int args = ptypes.size() - 1;
+        ClassDesc[] paramTypes = args > 0
+                ? ptypes.subList(1, args + 1).toArray(ConstantUtils.EMPTY_CLASSDESC)
+                : ConstantUtils.EMPTY_CLASSDESC;
+
+        MethodTypeDescImpl result = ofValidated(ptypes.get(0), paramTypes);
+        result.cachedDescriptorString = descriptor;
+        return result;
+    }
+
+
+    @Override
+    public ClassDesc returnType() {
+        return returnType;
+    }
+
+    @Override
+    public int parameterCount() {
+        return argTypes.length;
+    }
+
+    @Override
+    public ClassDesc parameterType(int index) {
+        return argTypes[index];
+    }
+
+    @Override
+    public List<ClassDesc> parameterList() {
+        return List.of(argTypes);
+    }
+
+    @Override
+    public ClassDesc[] parameterArray() {
+        return argTypes.clone();
+    }
+
+    @Override
+    public MethodTypeDesc changeReturnType(ClassDesc returnType) {
+        return ofValidated(requireNonNull(returnType), argTypes);
+    }
+
+    @Override
+    public MethodTypeDesc changeParameterType(int index, ClassDesc paramType) {
+        ClassDesc[] newArgs = argTypes.clone();
+        newArgs[index] = validateArgument(paramType);
+        return ofValidated(returnType, newArgs);
+    }
+
+    @Override
+    public MethodTypeDesc dropParameterTypes(int start, int end) {
+        Objects.checkIndex(start, argTypes.length);
+        Objects.checkFromToIndex(start, end, argTypes.length);
+
+        ClassDesc[] newArgs = new ClassDesc[argTypes.length - (end - start)];
+        if (start > 0) {
+            System.arraycopy(argTypes, 0, newArgs, 0, start);
+        }
+        if (end < argTypes.length) {
+            System.arraycopy(argTypes, end, newArgs, start, argTypes.length - end);
+        }
+        return ofValidated(returnType, newArgs);
+    }
+
+    @Override
+    public MethodTypeDesc insertParameterTypes(int pos, ClassDesc... paramTypes) {
+        if (pos < 0 || pos > argTypes.length)
+            throw new IndexOutOfBoundsException(pos);
+
+        ClassDesc[] newArgs = new ClassDesc[argTypes.length + paramTypes.length];
+        if (pos > 0) {
+            System.arraycopy(argTypes, 0, newArgs, 0, pos);
+        }
+        System.arraycopy(paramTypes, 0, newArgs, pos, paramTypes.length);
+        int destPos = pos + paramTypes.length;
+        if (pos < argTypes.length) {
+            System.arraycopy(argTypes, pos, newArgs, destPos, argTypes.length - pos);
+        }
+        // Validate after copying to avoid TOCTOU
+        for (int i = pos; i < destPos; i++) {
+            validateArgument(newArgs[i]);
+        }
+
+        return ofValidated(returnType, newArgs);
+    }
+
+    @Override
+    public String descriptorString() {
+        var desc = this.cachedDescriptorString;
+        if (desc != null)
+            return desc;
+
+        int len = 2 + returnType.descriptorString().length();
+        for (ClassDesc argType : argTypes) {
+            len += argType.descriptorString().length();
+        }
+        StringBuilder sb = new StringBuilder(len).append('(');
+        for (ClassDesc argType : argTypes) {
+            sb.append(argType.descriptorString());
+        }
+        desc = sb.append(')').append(returnType.descriptorString()).toString();
+        cachedDescriptorString = desc;
+        return desc;
+    }
+
+    @Override
+    public MethodType resolveConstantDesc(MethodHandles.Lookup lookup) throws ReflectiveOperationException {
+        @SuppressWarnings("removal")
+        MethodType mtype = AccessController.doPrivileged(new PrivilegedAction<>() {
+            @Override
+            public MethodType run() {
+                return MethodType.fromMethodDescriptorString(descriptorString(),
+                                                             lookup.lookupClass().getClassLoader());
+            }
+        });
+
+        // let's check that the lookup has access to all the types in the method type
+        lookup.accessClass(mtype.returnType());
+        for (Class<?> paramType: mtype.parameterArray()) {
+            lookup.accessClass(paramType);
+        }
+        return mtype;
+    }
+
+    /**
+     * Returns {@code true} if this {@linkplain MethodTypeDescImpl} is
+     * equal to another {@linkplain MethodTypeDescImpl}.  Equality is
+     * determined by the two descriptors having equal return types and argument
+     * types.
+     *
+     * @param o the {@code MethodTypeDescImpl} to compare to this
+     *       {@code MethodTypeDescImpl}
+     * @return {@code true} if the specified {@code MethodTypeDescImpl}
+     *      is equal to this {@code MethodTypeDescImpl}.
+     */
+    @Override
+    public boolean equals(Object o) {
+        if (this == o) return true;
+        if (o == null || getClass() != o.getClass()) return false;
+
+        MethodTypeDescImpl constant = (MethodTypeDescImpl) o;
+
+        return returnType.equals(constant.returnType)
+               && Arrays.equals(argTypes, constant.argTypes);
+    }
+
+    @Override
+    public int hashCode() {
+        int result = returnType.hashCode();
+        result = 31 * result + Arrays.hashCode(argTypes);
+        return result;
+    }
+
+    @Override
+    public String toString() {
+        return String.format("MethodTypeDesc[%s]", displayDescriptor());
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/constant/ModuleDescImpl.class b/tests/test_data/std/jdk/internal/constant/ModuleDescImpl.class
new file mode 100644
index 0000000000000000000000000000000000000000..7a8346b44571d6f73498e18fcdc853726e847eae
GIT binary patch
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/constant/ModuleDescImpl.java b/tests/test_data/std/jdk/internal/constant/ModuleDescImpl.java
new file mode 100644
index 00000000..89310c13
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/constant/ModuleDescImpl.java
@@ -0,0 +1,39 @@
+/*
+ * Copyright (c) 2023, 2024, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package jdk.internal.constant;
+
+import java.lang.constant.ModuleDesc;
+
+/*
+ * Implementation of {@code ModuleDesc}
+ * @param name must have been validated
+ */
+public record ModuleDescImpl(String name) implements ModuleDesc {
+
+    @Override
+    public String toString() {
+        return String.format("ModuleDesc[%s]", name());
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/constant/PackageDescImpl.class b/tests/test_data/std/jdk/internal/constant/PackageDescImpl.class
new file mode 100644
index 0000000000000000000000000000000000000000..e12bea51c6fa762a675304b7c53297a6d84cf0d2
GIT binary patch
literal 1573
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/constant/PackageDescImpl.java b/tests/test_data/std/jdk/internal/constant/PackageDescImpl.java
new file mode 100644
index 00000000..3ef65b4e
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/constant/PackageDescImpl.java
@@ -0,0 +1,39 @@
+/*
+ * Copyright (c) 2023, 2024, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package jdk.internal.constant;
+
+import java.lang.constant.PackageDesc;
+
+/*
+ * Implementation of {@code PackageDesc}
+ * @param internalName must have been validated
+ */
+public record PackageDescImpl(String internalName) implements PackageDesc {
+
+    @Override
+    public String toString() {
+        return String.format("PackageDesc[%s]", name());
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/constant/PrimitiveClassDescImpl.class b/tests/test_data/std/jdk/internal/constant/PrimitiveClassDescImpl.class
new file mode 100644
index 0000000000000000000000000000000000000000..d650f4894fffe51fcce8aae24948b27f807200eb
GIT binary patch
literal 2471
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zPs#N&C+OF-+GwFlIkEx+;fJm;6d*6PIqv$A2jPJ0x<5?_zaily!aGfbfjDWubo_SI
ob34!k#_5)yz-*#St8UV!UuMBYDX`_Btzet}Lu9657gb#N7Y|UC2LJ#7

literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/constant/PrimitiveClassDescImpl.java b/tests/test_data/std/jdk/internal/constant/PrimitiveClassDescImpl.java
new file mode 100644
index 00000000..123c76a1
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/constant/PrimitiveClassDescImpl.java
@@ -0,0 +1,77 @@
+/*
+ * Copyright (c) 2018, 2024, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package jdk.internal.constant;
+
+import java.lang.constant.ClassDesc;
+import java.lang.constant.ConstantDescs;
+import java.lang.constant.DynamicConstantDesc;
+import java.lang.invoke.MethodHandles;
+
+import sun.invoke.util.Wrapper;
+
+import static java.util.Objects.requireNonNull;
+
+/**
+ * A <a href="package-summary.html#nominal">nominal descriptor</a> for the class
+ * constant corresponding to a primitive type (e.g., {@code int.class}).
+ */
+public final class PrimitiveClassDescImpl
+        extends DynamicConstantDesc<Class<?>> implements ClassDesc {
+
+    private final String descriptor;
+
+    /**
+     * Creates a {@linkplain ClassDesc} given a descriptor string for a primitive
+     * type.
+     *
+     * @param descriptor the descriptor string, which must be a one-character
+     * string corresponding to one of the nine base types
+     * @throws IllegalArgumentException if the descriptor string does not
+     * describe a valid primitive type
+     * @jvms 4.3 Descriptors
+     */
+    public PrimitiveClassDescImpl(String descriptor) {
+        super(ConstantDescs.BSM_PRIMITIVE_CLASS, requireNonNull(descriptor), ConstantDescs.CD_Class);
+        if (descriptor.length() != 1
+            || "VIJCSBFDZ".indexOf(descriptor.charAt(0)) < 0)
+            throw new IllegalArgumentException(String.format("not a valid primitive type descriptor: %s", descriptor));
+        this.descriptor = descriptor;
+    }
+
+    @Override
+    public String descriptorString() {
+        return descriptor;
+    }
+
+    @Override
+    public Class<?> resolveConstantDesc(MethodHandles.Lookup lookup) {
+        return Wrapper.forBasicType(descriptorString().charAt(0)).primitiveType();
+    }
+
+    @Override
+    public String toString() {
+        return String.format("PrimitiveClassDesc[%s]", displayName());
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/constant/ReferenceClassDescImpl.class b/tests/test_data/std/jdk/internal/constant/ReferenceClassDescImpl.class
new file mode 100644
index 0000000000000000000000000000000000000000..3816499c943d08ea72f2ec50da2ffec0756a54b9
GIT binary patch
literal 3454
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/constant/ReferenceClassDescImpl.java b/tests/test_data/std/jdk/internal/constant/ReferenceClassDescImpl.java
new file mode 100644
index 00000000..b4ec9c13
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/constant/ReferenceClassDescImpl.java
@@ -0,0 +1,144 @@
+/*
+ * Copyright (c) 2018, 2024, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package jdk.internal.constant;
+
+import java.lang.constant.ClassDesc;
+import java.lang.invoke.MethodHandles;
+
+import static jdk.internal.constant.ConstantUtils.*;
+
+/**
+ * A <a href="package-summary.html#nominal">nominal descriptor</a> for a class,
+ * interface, or array type.  A {@linkplain ReferenceClassDescImpl} corresponds to a
+ * {@code Constant_Class_info} entry in the constant pool of a classfile.
+ */
+public final class ReferenceClassDescImpl implements ClassDesc {
+    private final String descriptor;
+
+    private ReferenceClassDescImpl(String descriptor) {
+        this.descriptor = descriptor;
+    }
+
+    /**
+     * Creates a {@linkplain ClassDesc} from a descriptor string for a class or
+     * interface type or an array type.
+     *
+     * @param descriptor a field descriptor string for a class or interface type
+     * @throws IllegalArgumentException if the descriptor string is not a valid
+     * field descriptor string, or does not describe a class or interface type
+     * @jvms 4.3.2 Field Descriptors
+     */
+    public static ReferenceClassDescImpl of(String descriptor) {
+        int dLen = descriptor.length();
+        int len = ConstantUtils.skipOverFieldSignature(descriptor, 0, dLen, false);
+        if (len <= 1 || len != dLen)
+            throw new IllegalArgumentException(String.format("not a valid reference type descriptor: %s", descriptor));
+        return new ReferenceClassDescImpl(descriptor);
+    }
+
+    /**
+     * Creates a {@linkplain ClassDesc} from a pre-validated descriptor string
+     * for a class or interface type or an array type.
+     *
+     * @param descriptor a field descriptor string for a class or interface type
+     * @jvms 4.3.2 Field Descriptors
+     */
+    public static ReferenceClassDescImpl ofValidated(String descriptor) {
+        return new ReferenceClassDescImpl(descriptor);
+    }
+
+    /**
+     * Creates a {@linkplain ClassDesc} from a pre-validated descriptor string
+     * for a class or interface type or an array type.
+     *
+     * @param descriptor a field descriptor string for a class or interface type
+     * @jvms 4.3.2 Field Descriptors
+     */
+    public static ClassDesc ofValidatedBinaryName(String typeSwitchClassName) {
+        return ofValidated("L" + binaryToInternal(typeSwitchClassName) + ";");
+    }
+
+    @Override
+    public String descriptorString() {
+        return descriptor;
+    }
+
+    @Override
+    public Class<?> resolveConstantDesc(MethodHandles.Lookup lookup)
+            throws ReflectiveOperationException {
+        if (isArray()) {
+            if (isPrimitiveArray()) {
+                return lookup.findClass(descriptor);
+            }
+            // Class.forName is slow on class or interface arrays
+            int depth = ConstantUtils.arrayDepth(descriptor);
+            Class<?> clazz = lookup.findClass(internalToBinary(descriptor.substring(depth + 1, descriptor.length() - 1)));
+            for (int i = 0; i < depth; i++)
+                clazz = clazz.arrayType();
+            return clazz;
+        }
+        return lookup.findClass(internalToBinary(dropFirstAndLastChar(descriptor)));
+    }
+
+    /**
+     * Whether the descriptor is one of a primitive array, given this is
+     * already a valid reference type descriptor.
+     */
+    private boolean isPrimitiveArray() {
+        // All L-type descriptors must end with a semicolon; same for reference
+        // arrays, leaving primitive arrays the only ones without a final semicolon
+        return descriptor.charAt(descriptor.length() - 1) != ';';
+    }
+
+    /**
+     * Returns {@code true} if this {@linkplain ReferenceClassDescImpl} is
+     * equal to another {@linkplain ReferenceClassDescImpl}.  Equality is
+     * determined by the two class descriptors having equal class descriptor
+     * strings.
+     *
+     * @param o the {@code ClassDesc} to compare to this
+     *       {@code ClassDesc}
+     * @return {@code true} if the specified {@code ClassDesc}
+     *      is equal to this {@code ClassDesc}.
+     */
+    @Override
+    public boolean equals(Object o) {
+        if (this == o) return true;
+        if (o instanceof ReferenceClassDescImpl constant) {
+            return descriptor.equals(constant.descriptor);
+        }
+        return false;
+    }
+
+    @Override
+    public int hashCode() {
+        return descriptor.hashCode();
+    }
+
+    @Override
+    public String toString() {
+        return String.format("ClassDesc[%s]", displayName());
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/event/DeserializationEvent.class b/tests/test_data/std/jdk/internal/event/DeserializationEvent.class
new file mode 100644
index 0000000000000000000000000000000000000000..1f8b52c17d67ab12b6090b1098b05951fe4619d8
GIT binary patch
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/event/DeserializationEvent.java b/tests/test_data/std/jdk/internal/event/DeserializationEvent.java
new file mode 100644
index 00000000..0caf6131
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/event/DeserializationEvent.java
@@ -0,0 +1,42 @@
+/*
+ * Copyright (c) 2021, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package jdk.internal.event;
+
+/**
+ * Event details relating to deserialization.
+ */
+
+public final class DeserializationEvent extends Event {
+    public boolean filterConfigured;
+    public String filterStatus;
+    public Class<?> type;
+    public int arrayLength;
+    public long objectReferences;
+    public long depth;
+    public long bytesRead;
+    public Class<?> exceptionType;
+    public String exceptionMessage;
+}
diff --git a/tests/test_data/std/jdk/internal/event/ErrorThrownEvent.class b/tests/test_data/std/jdk/internal/event/ErrorThrownEvent.class
new file mode 100644
index 0000000000000000000000000000000000000000..8f2ceec966681aa90fd15b74d0f7d780123d82e5
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literal 793
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/event/ErrorThrownEvent.java b/tests/test_data/std/jdk/internal/event/ErrorThrownEvent.java
new file mode 100644
index 00000000..c9f4ff3b
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/event/ErrorThrownEvent.java
@@ -0,0 +1,47 @@
+/*
+ * Copyright (c) 2023, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package jdk.internal.event;
+
+/**
+ * Event recording error exceptions.
+ */
+public final class ErrorThrownEvent extends Event {
+    public String message;
+    public Class<?> thrownClass;
+
+    public static void commit(long start, String message, Class<?> thrownClass) {
+        // Generated by JFR
+    }
+
+    public static boolean enabled() {
+        // Generated by JFR
+        return false;
+    }
+
+    public static long timestamp() {
+        // Generated by JFR
+        return 0;
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/event/Event.class b/tests/test_data/std/jdk/internal/event/Event.class
new file mode 100644
index 0000000000000000000000000000000000000000..e34dd0187a3b16b2d23d19d3b4d92064f7d5f53e
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literal 774
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literal 0
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diff --git a/tests/test_data/std/jdk/internal/event/Event.java b/tests/test_data/std/jdk/internal/event/Event.java
new file mode 100644
index 00000000..b01bb289
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/event/Event.java
@@ -0,0 +1,96 @@
+/*
+ * Copyright (c) 2018, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package jdk.internal.event;
+
+/**
+ * Base class for events, to be subclassed in order to define events and their
+ * fields.
+ *
+ * @hidden
+ */
+public abstract class Event {
+    /**
+     * Sole constructor, for invocation by subclass constructors, typically
+     * implicit.
+     */
+    protected Event() {
+    }
+
+    /**
+     * Starts the timing of this event.
+     */
+    public void begin() {
+    }
+
+    /**
+     * Ends the timing of this event.
+     *
+     * The {@code end} method must be invoked after the {@code begin} method.
+     */
+    public void end() {
+    }
+
+    /**
+     * Writes the field values, time stamp, and event duration.
+     * <p>
+     * If the event starts with an invocation of the {@code begin} method, but does
+     * not end with an explicit invocation of the {@code end} method, then the event
+     * ends when the {@code commit} method is invoked.
+     */
+    public void commit() {
+    }
+
+    /**
+     * Returns {@code true} if the event is enabled, {@code false} otherwise
+     *
+     * @return {@code true} if event is enabled, {@code false} otherwise
+     */
+    public boolean isEnabled() {
+        return false;
+    }
+
+    /**
+     * Returns {@code true} if the event is enabled and if the duration is within
+     * the threshold for the event, {@code false} otherwise.
+     *
+     * @return {@code true} if the event can be written, {@code false} otherwise
+     */
+    public boolean shouldCommit() {
+        return false;
+    }
+
+    /**
+     * Sets a field value.
+     *
+     * @param index the index of the field to set
+     * @param value value to set, can be {@code null}
+     * @throws UnsupportedOperationException if functionality is not supported
+     * @throws IndexOutOfBoundsException if {@code index} is less than {@code 0} or
+     *         greater than or equal to the number of fields specified for the event
+     */
+    public void set(int index, Object value) {
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/event/EventHelper$ThreadTrackHolder.class b/tests/test_data/std/jdk/internal/event/EventHelper$ThreadTrackHolder.class
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/event/EventHelper.java b/tests/test_data/std/jdk/internal/event/EventHelper.java
new file mode 100644
index 00000000..4da2d585
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/event/EventHelper.java
@@ -0,0 +1,173 @@
+/*
+ * Copyright (c) 2018, 2024, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package jdk.internal.event;
+
+import jdk.internal.access.JavaUtilJarAccess;
+import jdk.internal.access.SharedSecrets;
+import jdk.internal.misc.ThreadTracker;
+
+import java.lang.invoke.MethodHandles;
+import java.lang.invoke.VarHandle;
+import java.time.Duration;
+import java.time.Instant;
+import java.util.Date;
+import java.util.stream.Collectors;
+import java.util.stream.LongStream;
+
+/**
+ * A helper class to have events logged to a JDK Event Logger.
+ */
+
+public final class EventHelper {
+
+    private static final JavaUtilJarAccess JUJA = SharedSecrets.javaUtilJarAccess();
+    private static volatile boolean loggingSecurity;
+    private static volatile System.Logger securityLogger;
+    private static final VarHandle LOGGER_HANDLE;
+    static {
+        try {
+            LOGGER_HANDLE =
+                    MethodHandles.lookup().findStaticVarHandle(
+                            EventHelper.class, "securityLogger", System.Logger.class);
+        } catch (ReflectiveOperationException e) {
+            throw new Error(e);
+        }
+    }
+    private static final System.Logger.Level LOG_LEVEL = System.Logger.Level.DEBUG;
+
+    // helper class used for logging security related events for now
+    private static final String SECURITY_LOGGER_NAME = "jdk.event.security";
+
+
+    public static void logTLSHandshakeEvent(Instant start,
+                                            String peerHost,
+                                            int peerPort,
+                                            String cipherSuite,
+                                            String protocolVersion,
+                                            long peerCertId) {
+        assert securityLogger != null;
+        String prepend = getDurationString(start);
+        securityLogger.log(LOG_LEVEL, prepend +
+        " TLSHandshake: {0}:{1,number,#}, {2}, {3}, {4,number,#}",
+        peerHost, peerPort, protocolVersion, cipherSuite, peerCertId);
+    }
+
+    public static void logSecurityPropertyEvent(String key,
+                                                String value) {
+
+        assert securityLogger != null;
+        securityLogger.log(LOG_LEVEL,
+            "SecurityPropertyModification: key:{0}, value:{1}", key, value);
+    }
+
+    public static void logX509ValidationEvent(long anchorCertId,
+                                         long[] certIds) {
+        assert securityLogger != null;
+        String codes = LongStream.of(certIds)
+                .mapToObj(Long::toString)
+                .collect(Collectors.joining(", "));
+        securityLogger.log(LOG_LEVEL,
+                "ValidationChain: {0,number,#}, {1}", anchorCertId, codes);
+    }
+
+    public static void logX509CertificateEvent(String algId,
+                                               String serialNum,
+                                               String subject,
+                                               String issuer,
+                                               String keyType,
+                                               int length,
+                                               long certId,
+                                               long beginDate,
+                                               long endDate) {
+        assert securityLogger != null;
+        securityLogger.log(LOG_LEVEL, "X509Certificate: Alg:{0}, Serial:{1}" +
+            ", Subject:{2}, Issuer:{3}, Key type:{4}, Length:{5,number,#}" +
+            ", Cert Id:{6,number,#}, Valid from:{7}, Valid until:{8}",
+            algId, serialNum, subject, issuer, keyType, length,
+            certId, new Date(beginDate), new Date(endDate));
+    }
+
+    /**
+     * Method to calculate a duration timestamp for events which measure
+     * the start and end times of certain operations.
+     * @param start Instant indicating when event started recording
+     * @return A string representing duraction from start time to
+     * time of this method call. Empty string is start is null.
+     */
+    private static String getDurationString(Instant start) {
+        if (start != null) {
+            if (start.equals(Instant.MIN)) {
+                return "N/A";
+            }
+            Duration duration = Duration.between(start, Instant.now());
+            long micros = duration.toNanos() / 1_000;
+            if (micros < 1_000_000) {
+                return "duration = " + (micros / 1_000.0) + " ms:";
+            } else {
+                return "duration = " + ((micros / 1_000) / 1_000.0) + " s:";
+            }
+        } else {
+            return "";
+        }
+    }
+
+    private static class ThreadTrackHolder {
+        static final ThreadTracker TRACKER = new ThreadTracker();
+    }
+
+    private static Object tryBeginLookup() {
+        return ThreadTrackHolder.TRACKER.tryBegin();
+    }
+
+    private static void endLookup(Object key) {
+        ThreadTrackHolder.TRACKER.end(key);
+    }
+
+    /**
+     * Helper to determine if security events are being logged
+     * at a preconfigured logging level. The configuration value
+     * is read once at class initialization.
+     *
+     * @return boolean indicating whether an event should be logged
+     */
+    public static boolean isLoggingSecurity() {
+        Object key;
+        // Avoid bootstrap issues where
+        // * commitEvent triggers early loading of System Logger but where
+        //   the verification process still has JarFiles locked
+        // * the loading of the logging libraries involves recursive
+        //   calls to security libraries triggering recursion
+        if (securityLogger == null && !JUJA.isInitializing() && (key = tryBeginLookup()) != null) {
+            try {
+                LOGGER_HANDLE.compareAndSet(null, System.getLogger(SECURITY_LOGGER_NAME));
+                loggingSecurity = securityLogger.isLoggable(LOG_LEVEL);
+            } finally {
+                endLookup(key);
+            }
+        }
+        return loggingSecurity;
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/event/ExceptionStatisticsEvent.class b/tests/test_data/std/jdk/internal/event/ExceptionStatisticsEvent.class
new file mode 100644
index 0000000000000000000000000000000000000000..8dcee1c6528d63b4948b81b09133c2354e013635
GIT binary patch
literal 566
zcmb7AyG{Z@6g>mGth=HpDiRY-Oe_F{TUlvr2o{9cU?}W{WfBJ2S+YBzAEkwriG?5F
zM;Y%-HpciUEav1s&b{Z{d3%3(1<*k~KmkP$P8lvr4E5>wHk3+>RPk9TmO|;UYmlLI
zE|t_548=xs=wXH7_&4%>B<5NsYM{B6nU+zO&j)&vCU<-^6Bz^RF*u!MEEp<%sl?SH
z9*OkYbQ!AsB;vCnPo>H8qN6902HX9Ah@O$_D2Zc9_T5IW*BmnVTE-&NJf1UnLK%gz
zz3Ijx`3eTfB8|kQG+y?*e;jl&<x7r3c=Uk)T?8KiMGi&um4vI5g|-8@t!J<&DilyA
zG;QDjYlLMRyI4nsG9Me*%!f}Ycj)~XJhFqeT)Ap>jR)hPK)8kNe8rw!PO`-Zv*?R>
YgLqZ!eDcf{#Pc7&@!G_wnGSY80K7bEqW}N^

literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/event/ExceptionStatisticsEvent.java b/tests/test_data/std/jdk/internal/event/ExceptionStatisticsEvent.java
new file mode 100644
index 00000000..4ab58b7c
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/event/ExceptionStatisticsEvent.java
@@ -0,0 +1,47 @@
+/*
+ * Copyright (c) 2023, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package jdk.internal.event;
+
+/**
+ * Event recording number of exceptions that has been created.
+ */
+public class ExceptionStatisticsEvent extends Event {
+
+    public long throwables;
+
+    public static void commit(long timestamp, long throwables) {
+        // Generated by JFR
+    }
+
+    public static boolean enabled() {
+        // Generated by JFR
+        return false;
+    }
+
+    public static long timestamp() {
+        // Generated by JFR
+        return 0;
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/event/ExceptionThrownEvent.class b/tests/test_data/std/jdk/internal/event/ExceptionThrownEvent.class
new file mode 100644
index 0000000000000000000000000000000000000000..85269edb527f7f7b656631f59592556dd508fb63
GIT binary patch
literal 805
zcma)4K~ED=5dI#!?b?bUhzO{_!GyMnZaho4G<YD5i7Dy9+oOFc4|m@-yRQiUNe`Y(
zJop3rQO0jxt5(8+P2SAx%r`UNym>!=eg6TVi~S~+5G9D0QA1r}>tggVwa%N;=`1yu
z#`*MEq(c4BI_r-VqE>s5;GV+4ZQ!e+nRr{c)AO?U<mS0aZmLR;jlz2GLSO1M({7yh
zeQDkJjlz8&z}-w&mBQKrB)EuZ^zGPbKP_2e<7WJ@b3{noEk=y4_N+7SrumsEPxV<A
zS{6f{4RmScf9{O^xn-|*?~XIDL48={x#dk9v`!W%%%@oJ%t*Hf3bo4Xk{RkmVYBxi
zjqAxDDxJHOlNqIAVw_Ad3Tybli}99s>vcW}9`<SWi)lGDZ>`L}eSFJ4UdamZ8VPp~
z9#%n<78ikK$_K%_f|xd61?4I|DYc@mb-qD;4UmVF5(aj$Mk&bzU>%RB8`!{OmY3xB
zJTXs5jPNh<MM&I7BtdNA3AI?lNZ8FdMcAS}D=(fE;%6+kiQK_c;-t+EwR}s_XG*ou
Zr$yW|JpYT6+Qc=!+`zpgVpk&A`wfz+r_lfa

literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/event/ExceptionThrownEvent.java b/tests/test_data/std/jdk/internal/event/ExceptionThrownEvent.java
new file mode 100644
index 00000000..45c13e30
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/event/ExceptionThrownEvent.java
@@ -0,0 +1,47 @@
+/*
+ * Copyright (c) 2023, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package jdk.internal.event;
+
+/**
+ * Event recording all exception.
+ */
+public final class ExceptionThrownEvent extends Event {
+    public String message;
+    public Class<?> thrownClass;
+
+    public static void commit(long start, String message, Class<?> thrownClass) {
+        // Generated by JFR
+    }
+
+    public static boolean enabled() {
+        // Generated by JFR
+        return false;
+    }
+
+    public static long timestamp() {
+        // Generated by JFR
+        return 0;
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/event/FileForceEvent.class b/tests/test_data/std/jdk/internal/event/FileForceEvent.class
new file mode 100644
index 0000000000000000000000000000000000000000..244d8567095504f63260d352f4c149ec352ca0f2
GIT binary patch
literal 926
zcmah|%W@Jy6g>?C1Try(C>f(cW1>PT<t%+9<pxbvD0CBL!O9MF!X)#ch9>2&_z${p
zCFQ~o@S7~l)6G;0U*#<N-oB4>PoM7j_T$S}04+2s$RS^X<D!6~fOj@H_k&ogG?t;S
zE>x`j7iJYG?gw$8p9$m}&29w?D3?%iu?SaS^Dk`&L8uOrw6C)MvJN6O)-oDdh_->a
z;$j(B1>Es4nS_H@5=8+=IgNI+XYy4StGLG5{Vd}(+U?GnypVn<<5T}gr$KzW*K2m!
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zluRh5QB`2|S8*R2MX*W1a=g_X1g@h-k2K)X7U}VNx!&N;rxmn?ozD=T=;W}T6#?70
zN#C6n;1)KxE2ECvS@S!>6dCiTDAm;?r{+wt^d5`#nzOqx#frhpTf8b9`j1h<6JGLD
zQrWlIJ2vj&4hfsjvt$i%&(h7aV+D7ab+E-KX@AF>Ll%4r8H+<3=K+7Ge>gWnT#gVH
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SeAbmea-FXWxw~&Nc<>W*7nXSd

literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/event/FileForceEvent.java b/tests/test_data/std/jdk/internal/event/FileForceEvent.java
new file mode 100644
index 00000000..f6dec6c8
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/event/FileForceEvent.java
@@ -0,0 +1,110 @@
+/*
+ * Copyright (c) 2024, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package jdk.internal.event;
+
+/**
+ * A JFR event for forced updates written to files.  This event is mirrored in
+ * {@code jdk.jfr.events.FileForceEvent } where the event annotations are
+ * provided.  Some of the methods are replaced by generated
+ * methods when jfr is enabled.  Note that the order of the arguments of the
+ * {@link #commit(long, long, String, boolean)} method
+ * must be the same as the order of the fields.
+ */
+public class FileForceEvent extends Event {
+
+    // THE ORDER OF THE FOLLOWING FIELDS IS IMPORTANT!
+    // The order must match the argument order of the generated commit method.
+    public String path;
+    public boolean metaData;
+
+    /**
+     * Helper method to offer the data needed to potentially commit an event.
+     * The duration of the operation is computed using the current
+     * timestamp and the given start time.  If the duration is meets
+     * or exceeds the configured value (determined by calling the generated method
+     * {@link #shouldCommit(long)}), an event will be emitted by calling
+     * {@link #commit(long, long, String, boolean)}.
+     *
+     * @param start     timestamp of the start of the operation
+     * @param path      the full pathname of the file
+     * @param metaData  true if the file metadata is updated
+     */
+    public static void offer(long start, String path, boolean metaData) {
+        long duration = timestamp() - start;
+        if (shouldCommit(duration)) {
+            commit(start, duration, path, metaData);
+        }
+    }
+
+    /**
+     * Actually commit an event.  The implementation is generated automatically.
+     * The order of the fields must be the same as the parameters in this method.
+     *
+     * @param start     timestamp of the start of the operation
+     * @param duration  time in nanoseconds to complete the operation
+     * @param path      the full pathname of the file
+     * @param metaData  true if the file metadata is updated
+     */
+    public static void commit(long start, long duration, String path, boolean metaData) {
+        // Generated by JFR
+    }
+
+    /**
+     * Determine if an event should be emitted.  The duration of the operation
+     * must exceed some threshold in order to commit the event.  The implementation
+     * of this method is generated automatically if jfr is enabled.
+     *
+     * @param duration  time in nanoseconds to complete the operation
+     * @return  true if the event should be commited
+     */
+    public static boolean shouldCommit(long duration) {
+        // Generated by JFR
+        return false;
+    }
+
+    /**
+     * Determine if this kind of event is enabled.  The implementation
+     * of this method is generated automatically if jfr is enabled.
+     *
+     * @return true if this type of event is enabled, false otherwise
+     */
+    public static boolean enabled() {
+        // Generated by JFR
+        return false;
+    }
+
+    /**
+     * Fetch the current timestamp in nanoseconds.  This method is used
+     * to determine the start and end of an operation.  The implementation
+     * of this method is generated automatically if jfr is enabled.
+     *
+     * @return  the current timestamp value
+     */
+    public static long timestamp() {
+        // Generated by JFR
+        return 0L;
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/event/FileReadEvent.class b/tests/test_data/std/jdk/internal/event/FileReadEvent.class
new file mode 100644
index 0000000000000000000000000000000000000000..24eb6b85bef199f2ad13e9997654db52f85c4622
GIT binary patch
literal 741
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zD0U8w6D9j{7j}xg&CSy5{H%&_mi}^4tg>`e<hkYU!7veCH(iz5+rsf0^Cq=DOp?F1
zOOE!Z3LVxgDep~+RXI2HYJ)#cbSQ_xV}$$%pbZX#9zBIi=vVeKuF!TE;ScfMB#LR3
zL?3>I`a-9Lt9&I5?BE*Teoept*NGzBz)eO(e5cA#)BZ%H)|5l?ZsGQCo{U6Z^!Wns
zfV?eiH@ru*!mR79Px54Kk{0{QLJ{ubUZb24ccu2l6`obXr`%Wuyk7~$lM>RZzEV(m
Ra;KUnmkOENVZ4P0zW^DSeYOAq

literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/event/FileReadEvent.java b/tests/test_data/std/jdk/internal/event/FileReadEvent.java
new file mode 100644
index 00000000..34ff4e9d
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/event/FileReadEvent.java
@@ -0,0 +1,56 @@
+/*
+ * Copyright (c) 2024, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package jdk.internal.event;
+
+/**
+ * Event recording file reads.
+ */
+public final class FileReadEvent extends Event {
+
+    // The order of these fields must be the same as the parameters in
+    // commit(..., String, long, boolean)
+    public String path;
+    public long bytesRead;
+    public boolean endOfFile;
+
+    public static boolean enabled() {
+        // Generated by JFR
+        return false;
+    }
+
+    public static long timestamp() {
+        // Generated by JFR
+        return 0L;
+    }
+
+    public static boolean shouldCommit(long duration) {
+        // Generated by JFR
+        return false;
+    }
+
+    public static void commit(long start, long duration, String path, long bytesRead, boolean endOfFile) {
+        // Generated by JFR
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/event/FileWriteEvent.class b/tests/test_data/std/jdk/internal/event/FileWriteEvent.class
new file mode 100644
index 0000000000000000000000000000000000000000..2be7d1d0310e410c4f96375fc2b5bf0731f26fcb
GIT binary patch
literal 712
zcmah`O-~y^41G>ESrWF;h8EHfkPwF^2zAAUORHWYkXS{%Pz8zGBs(GlyR&FBLF#{M
z4?R`tfgiw+LbWFm3KWUMc*gd7_Os{q?(YqN9=4jOpc*2GP(z*2zDO@)W1TLo%3^)3
zt&0!E66#-!HSQ~++UX8LED^S!03Vr5pO(hyIV-qQZcJ$PFVwY)GiA@?6IU90{+SRB
ze>go6w9}SA2_fhesV1!Ujn&_#`B0bN)iC2ot6z*%Hc+Jze;y3n*h~mJ{bz-6w@_Q5
zrhb4kLc^I{Pn^oHe1w}vlW{T4(q570h6fHhNtba;>9kbN6s)j5ny1>GB>8`$q&pzg
zxMa!f=1DOvM_TqlSbMmZPqGZ`Bjn|S4~s#QUxZ~ueAoEJ-@*0;dokZ6(cM3w-~6ax
zg{`E4Ev&MQW&pgzEA|>_VT~g~e&;jHss3b-7MLFy_Zn~RaUz9rjbD#&dyHGh#vHfD
zw-@c}Eh^bxP*OqL57NL}uRxR>^9iN);}H%#aTkGa{N58qs+5pcv+c~XvLD&b2aZ>;
F`496rd>H@$

literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/event/FileWriteEvent.java b/tests/test_data/std/jdk/internal/event/FileWriteEvent.java
new file mode 100644
index 00000000..7a39f93b
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/event/FileWriteEvent.java
@@ -0,0 +1,55 @@
+/*
+ * Copyright (c) 2023, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package jdk.internal.event;
+
+/**
+ * Event recording file writes.
+ */
+public final class FileWriteEvent extends Event {
+
+    // The order of these fields must be the same as the parameters in
+    // commit(..., String, long)
+    public String path;
+    public long bytesWritten;
+
+    public static boolean enabled() {
+        // Generated by JFR
+        return false;
+    }
+
+    public static long timestamp() {
+        // Generated by JFR
+        return 0L;
+    }
+
+    public static boolean shouldCommit(long duration) {
+        // Generated by JFR
+        return false;
+    }
+
+    public static void commit(long start, long duration, String path, long bytesWritten) {
+        // Generated by JFR
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/event/JFRTracing.class b/tests/test_data/std/jdk/internal/event/JFRTracing.class
new file mode 100644
index 0000000000000000000000000000000000000000..6a974714a91d7d67553782f4ca0ffe4779e6b6ae
GIT binary patch
literal 1173
zcmaJ>T~pIQ6g}IP25PX-)<Ua%_<^=X2;#RzX0+NFoDR%Th6mr4bZJw!n@*CV@~?bB
z#|M9aKg#iL0yOyG%gx^0bI+c8vYX$3e*OZ`!0QYWNE%3)m_V9grq55fCAsQadq;g?
z2Mp;gM>)YZL$XpmG%(4KAA=5hp8J^}Ns&PY*9@2@rg5ENq2KvrIVupI;?fc)LIu``
z=Kg`lZAW#9R4CoWP^h%VYz@hMzpi(gVVDcwJFeAqq}WlzQP2)N!3PF%4D<2g-YAGw
z3k+p{q%1|Pb}#I1^te(&?hJ;~Krz<6&sE1Ays>TJ`+A#6%rj*A$KJWn49d7^;FgI6
zEHY&OkxG7bMet78l6#`lbcF0Mti>lH$uw`h8XM9R$C8XCVFa&du#DRV?wGiXdly58
z{$If{O#32;ggT*dsmjOdq3*tK;sGion*eWJR|>8eig6Lqm#h<>A=Pj@WP7&dD6u;l
z90~6r`VhI6Yjb(XJxAx~FH=F!@fns{|NWeG+Wh?&TMProRlb1@hQ+Z{yKZ}A_rhr}
zK?XJ%mdBVKDMgpdXueAn!vr~ddde^x^DjCiR6CCRF2!nBJR@1ft3!PqUJO=<HHCy*
zwQa&rwVkfw!N?<v=HeD!Vzh^uwmb4{p$`l>IX>3wdLTTan~<Q(1tdW#k)~Ls%%Ufw
z=S1y0*f&}vP@|~JzzS9=nh^jGu}0YxU8OXkbaOMT0Og$V15>%I4zoJsb+|!6GqRAe
zOkF^Qwyu(t8nVP)AkGr8u2V&GTA@t3sw7hL3wmnN`C4x745ij;>I_S(jN*zWPKLxe
zq-ebXgPKijB8SJJ>|)eP*%PYMPXJHxjKn;rEE*|KwHK7dw|_}_0<Q>H4_8}%0b*tm
AH~;_u

literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/event/JFRTracing.java b/tests/test_data/std/jdk/internal/event/JFRTracing.java
new file mode 100644
index 00000000..5882b2dd
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/event/JFRTracing.java
@@ -0,0 +1,52 @@
+/*
+ * Copyright (c) 2024, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package jdk.internal.event;
+
+import sun.nio.ch.FileChannelImpl;
+import java.io.FileInputStream;
+import java.io.FileOutputStream;
+import java.io.RandomAccessFile;
+import java.lang.Throwable;
+import java.lang.reflect.Field;
+
+/**
+ * Helper class to enable JFR tracing.
+ */
+public final class JFRTracing {
+
+  public static void enable() throws NoSuchFieldException, IllegalAccessException {
+      enable(Throwable.class);
+      enable(FileInputStream.class);
+      enable(FileOutputStream.class);
+      enable(FileChannelImpl.class);
+      enable(RandomAccessFile.class);
+  }
+
+  private static void enable(Class<?> clazz) throws NoSuchFieldException, IllegalAccessException {
+      Field field = clazz.getDeclaredField("jfrTracing");
+      field.setAccessible(true);
+      field.setBoolean(null, true);
+  }
+}
diff --git a/tests/test_data/std/jdk/internal/event/ProcessStartEvent.class b/tests/test_data/std/jdk/internal/event/ProcessStartEvent.class
new file mode 100644
index 0000000000000000000000000000000000000000..4ba52d514cb5ee6eb032179de570309f62c728b4
GIT binary patch
literal 399
zcma)2yH3ME5S+E07>prc9-^c`2q-vFgJ>cskcE(p(qHUTxL}{r<q|2MMTJDc2k=pd
zJ#YsF&CKrX-0f&TKHuH}46&OaKo}!R(L<lGKdqjGHcnY1YoQj(IC1Tf(7)71yDLI?
zd@_o$LOA@xd~e%Q&1Qv@)^!iVXI&BKmatlBt4i0}B_YeFav?=6%|sN=YBRYY#AVww
z(y%=mwv{3ba&6SzycsL|AjdT;S>Bei9!aZx--(fX)HA|S{+~p=Cn?&wE!B<oKkog?
zeCDI!95EjU2*Jsba79={`pxSdlRq2l8>|XuV(y*3f?l`?Fktj!-~gM9>5l<h$haeH
IGX~iC0-dy6Z2$lO

literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/event/ProcessStartEvent.java b/tests/test_data/std/jdk/internal/event/ProcessStartEvent.java
new file mode 100644
index 00000000..ca9264fe
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/event/ProcessStartEvent.java
@@ -0,0 +1,36 @@
+/*
+ * Copyright (c) 2020, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package jdk.internal.event;
+
+/**
+ * Event for the start of an OS procsss
+ */
+
+public final class ProcessStartEvent extends Event {
+    public long pid;
+    public String directory;
+    public String command;
+}
diff --git a/tests/test_data/std/jdk/internal/event/SecurityPropertyModificationEvent.class b/tests/test_data/std/jdk/internal/event/SecurityPropertyModificationEvent.class
new file mode 100644
index 0000000000000000000000000000000000000000..21ce36ff9124de33a3bdc9880bbea22b4e710d93
GIT binary patch
literal 421
zcmbVIyGq1B6g_wI(imNhjir^Sg@YhAip`=`6d|(xY%;F18z(YO0{JW}!NL#lqr@9c
zDF_yG&YUxM?(5_8?H#}b+c8G)BKQdcgoK?%xfI$sWsR(aYL#)~vPVLAu8npV1aJRf
z8exTS@=I{8ipFZ!-P-y|S=U|HrM}mNbh<V}B5$cWLYggPD@7&ET;$GbGe08)t*jbF
z@F#W2G|se9H_hWr**iI_*h#axkkwRL-Rr^h-GhE6oM!*&hpWbU-Pl51>Au3=pA#JQ
zjpG;*uMT_&tBCnVSR0rJLC88`S1=QEaQF&(`TnrZ*gpfi*kDY40x-rVE5a7z2<aC|
Cq-%cw

literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/event/SecurityPropertyModificationEvent.java b/tests/test_data/std/jdk/internal/event/SecurityPropertyModificationEvent.java
new file mode 100644
index 00000000..294ff902
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/event/SecurityPropertyModificationEvent.java
@@ -0,0 +1,35 @@
+/*
+ * Copyright (c) 2018, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package jdk.internal.event;
+
+/**
+ * Event details relating to the modification of a Security property.
+ */
+
+public final class SecurityPropertyModificationEvent extends Event {
+    public String key;
+    public String value;
+}
diff --git a/tests/test_data/std/jdk/internal/event/SecurityProviderServiceEvent.class b/tests/test_data/std/jdk/internal/event/SecurityProviderServiceEvent.class
new file mode 100644
index 0000000000000000000000000000000000000000..de214d7657912e4a0ccca8fd8fd34eb17223fbc7
GIT binary patch
literal 607
zcmb7B%SyvQ6g|_lrcLAfRo{vW9}7d*EpAF(6%|qnx{Jxsj>d^hlR*E;jS3bN`~W{n
zyc2`C5W&qoGxy9n_i*R^<K+!N3!4@SFiaF}lrX_iyAEy~A!Dwj7dkxUGIrX!GE6ju
z6!9^Gv47C3pp1$M%SIJ8gY%2b<$j_>JUUlVDgv%tu2SLi+^y8^wNJYY_0B(~4U0xk
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z(ux9-Om~Fjr^)RVS6%I^O(Ne5d!7>do;Qo}KnxiyG3+Kv^59I8S<?^m4OwoKD4(AQ
zZLss#B93%I)G2m>{-cOhy-zyPT+C;<kmF*81~K$eRF{Z#2pM7Na18c9hXR(VY8u!^
zjjH|i04teog$B$}M~k;I1~4CCK4bEpTI`2>k20-&Puk7$0o7NOFUFXCf~n{I6ztG#
Joq7dqd;;hjf7k#3

literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/event/SecurityProviderServiceEvent.java b/tests/test_data/std/jdk/internal/event/SecurityProviderServiceEvent.java
new file mode 100644
index 00000000..8dca527c
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/event/SecurityProviderServiceEvent.java
@@ -0,0 +1,45 @@
+/*
+ * Copyright (c) 2022, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package jdk.internal.event;
+
+/**
+ * Event recording details of Provider.getService(String type, String algorithm) calls
+ */
+
+public final class SecurityProviderServiceEvent extends Event {
+    private static final SecurityProviderServiceEvent EVENT = new SecurityProviderServiceEvent();
+
+    /**
+     * Returns {@code true} if event is enabled, {@code false} otherwise.
+     */
+    public static boolean isTurnedOn() {
+        return EVENT.isEnabled();
+    }
+
+    public String type;
+    public String algorithm;
+    public String provider;
+}
diff --git a/tests/test_data/std/jdk/internal/event/SerializationMisdeclarationEvent.class b/tests/test_data/std/jdk/internal/event/SerializationMisdeclarationEvent.class
new file mode 100644
index 0000000000000000000000000000000000000000..d3bd1921def3189a821095912bd0d3cae74a58a6
GIT binary patch
literal 937
zcmbVKTWb?R6#gc=NxCuGi?!BzYrS9+#C?!HSqc*LA*_N#g7j^g9nz_LDSIjCZ_)>!
z1RwkX{wVRA*{!Zx5L}pZ{mwbxnb~jOzkCHS#@!xTaJq2&Xrm*rc^tm=byBD-k&&-X
zRZ{rRj1=hX=|mU%0?uGK>tadZ@j2kB%CwC1ds*l-d7<-A%_EsvukN!FpG8$Tj%1z-
ztOm#ORQi!j7QPKV5%8vZk;tOVl)(C*`MuFTA>CNzxm*yi)&NY4OeYJb-EkT+w;bq1
zy)5HHmA#gSkwvF-8O<b_(yxPVaimFQH~5dGIIJ^I<5=^W9t<W8GSxPXK+SGA6KLm!
z%vd2N0vo|^l-`}3(Hi~T&Mbd^$9{g4mQgsasknp5@IYWGEUO3Ljj6<}9NI@@$}2SQ
zu#oYIjgUxhnwHsIJ=f-<?*HpGADMT<4!Zn{z{8H{QC_fKpVmcOqTQy&|BG^&o=+`I
zbo3eGlZCEOnlx|^tCXhHl&#@1wTE?FVS7{jipS-#g${ld?%Kj_I3|e=T%|UaVPx1<
zTpVoDuG*VipSg<dHF{gPPMjI@klOC#e4y8A%z4@%*uo7v$HPtBsw=ms&DXM(qEQ)e
Y!fkB-#F_rYc^@g8xHt56Oa^y;09x+E8vp<R

literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/event/SerializationMisdeclarationEvent.java b/tests/test_data/std/jdk/internal/event/SerializationMisdeclarationEvent.java
new file mode 100644
index 00000000..3ffdf485
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/event/SerializationMisdeclarationEvent.java
@@ -0,0 +1,91 @@
+/*
+ * Copyright (c) 2023, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package jdk.internal.event;
+
+/**
+ * A JFR event for serialization misdeclarations.
+ * This event is mirrored in {@code jdk.jfr.events.SerializationMisdeclarationEvent}
+ * where the metadata for the event is provided with annotations.
+ * Some of the methods are replaced by generated methods when jfr is enabled.
+ * Note that the order of the arguments of the {@link #commit(long,Class,String)}
+ * method must be the same as the order of the fields.
+ */
+public class SerializationMisdeclarationEvent extends Event {
+
+    public Class<?> misdeclaredClass;
+    public String message;
+
+    /**
+     * Commit a serialization misdeclaration event.
+     * The implementation of this method is generated automatically if jfr is enabled.
+     * The order of the fields must be the same as the parameters in this method.
+     * {@code commit(long,Class,String)}
+     *
+     * @param start             timestamp of the start of the operation
+     * @param misdeclaredClass  the affected class
+     * @param message           the specific event message
+     */
+    public static void commit(long start, Class<?> misdeclaredClass, String message) {
+        // Generated by JFR
+    }
+
+    /**
+     * Determine if an event should be emitted.  The duration of the operation
+     * must exceed some threshold in order to commit the event.  The implementation
+     * of this method is generated automatically if jfr is enabled.
+     *
+     * @param duration  time in nanoseconds to complete the operation
+     * @return  true if the event should be commited
+     */
+    public static boolean shouldCommit(long duration) {
+        // Generated by JFR
+        return false;
+    }
+
+    /**
+     * Determine if this kind of event is enabled.  The implementation
+     * of this method is generated automatically if jfr is enabled.
+     *
+     * @return whether serialization misdeclaration events are enabled
+     */
+    public static boolean enabled() {
+        // Generated by JFR
+        return false;
+    }
+
+    /**
+     * Fetch the current timestamp in nanoseconds.  This method is used
+     * to determine the start and end of an operation.  The implementation
+     * of this method is generated automatically if jfr is enabled.
+     *
+     * @return  the current timestamp value
+     */
+    public static long timestamp() {
+        // Generated by JFR
+        return 0L;
+    }
+
+}
diff --git a/tests/test_data/std/jdk/internal/event/SocketReadEvent.class b/tests/test_data/std/jdk/internal/event/SocketReadEvent.class
new file mode 100644
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GIT binary patch
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/event/SocketReadEvent.java b/tests/test_data/std/jdk/internal/event/SocketReadEvent.java
new file mode 100644
index 00000000..d5f6c324
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/event/SocketReadEvent.java
@@ -0,0 +1,149 @@
+/*
+ * Copyright (c) 2023, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package jdk.internal.event;
+
+
+import java.net.InetSocketAddress;
+import java.net.SocketAddress;
+import java.net.UnixDomainSocketAddress;
+
+/**
+ * A JFR event for socket read operations.  This event is mirrored in
+ * {@code jdk.jfr.events.SocketReadEvent } where the metadata for the event is
+ * provided with annotations.  Some of the methods are replaced by generated
+ * methods when jfr is enabled.  Note that the order of the arguments of the
+ * {@link #commit(long, long, String, String, int, long, long, boolean)} method
+ * must be the same as the order of the fields.
+ */
+public class SocketReadEvent extends Event {
+
+    // THE ORDER OF THE FOLLOWING FIELDS IS IMPORTANT!
+    // The order must match the argument order of the generated commit method.
+    public String host;
+    public String address;
+    public int port;
+    public long timeout;
+    public long bytesRead;
+    public boolean endOfStream;
+
+    /**
+     * Actually commit a socket read event.  The implementation
+     * of this method is generated automatically if jfr is enabled.
+     * The order of the fields must be the same as the parameters in this method.
+     * {@code commit(..., String, String, int, long, long, boolean)}
+     *
+     * @param start     timestamp of the start of the operation
+     * @param duration  time in nanoseconds to complete the operation
+     * @param host      remote host of the transfer
+     * @param address   remote address of the transfer
+     * @param port      remote port of the transfer
+     * @param timeout   timeout setting for the read
+     * @param bytes     number of bytes that were transferred
+     * @param endOfStream  has the end of the stream been reached
+     */
+    public static void commit(long start, long duration, String host, String address, int port, long timeout, long bytes, boolean endOfStream) {
+        // Generated by JFR
+    }
+
+    /**
+     * Determine if an event should be emitted.  The duration of the operation
+     * must exceed some threshold in order to commit the event.  The implementation
+     * of this method is generated automatically if jfr is enabled.
+     *
+     * @param duration  time in nanoseconds to complete the operation
+     * @return  true if the event should be commited
+     */
+    public static boolean shouldCommit(long duration) {
+        // Generated by JFR
+        return false;
+    }
+
+    /**
+     * Determine if this kind of event is enabled.  The implementation
+     * of this method is generated automatically if jfr is enabled.
+     *
+     * @return true if socket read events are enabled, false otherwise
+     */
+    public static boolean enabled() {
+        // Generated by JFR
+        return false;
+    }
+
+    /**
+     * Fetch the current timestamp in nanoseconds.  This method is used
+     * to determine the start and end of an operation.  The implementation
+     * of this method is generated automatically if jfr is enabled.
+     *
+     * @return  the current timestamp value
+     */
+    public static long timestamp() {
+        // Generated by JFR
+        return 0L;
+    }
+
+    /**
+     * Helper method to offer the data needed to potentially commit an event.
+     * The duration of the operation is computed using the current
+     * timestamp and the given start time.  If the duration is meets
+     * or exceeds the configured value (determined by calling the generated method
+     * {@link #shouldCommit(long)}), an event will be emitted by calling
+     * {@link #emit(long, long, long, SocketAddress, long)}
+     *
+     * @param start  the start time
+     * @param nbytes  how many bytes were transferred
+     * @param remote  the address of the remote socket
+     * @param timeout  maximum time to wait
+     */
+    public static void offer(long start, long nbytes, SocketAddress remote, long timeout) {
+        long duration = timestamp() - start;
+        if (shouldCommit(duration)) {
+            emit(start, duration, nbytes, remote, timeout);
+        }
+    }
+
+    /**
+     * Helper method to perform a common task of getting event data ready and
+     * then emitting the event by calling
+     * {@link #commit(long, long, String, String, int, long, long, boolean)}.
+     *
+     * @param start  the start time
+     * @param duration the duration
+     * @param nbytes  how many bytes were transferred
+     * @param remote  the address of the remote socket
+     * @param timeout  maximum time to wait
+     */
+    public static void emit(long start, long duration, long nbytes, SocketAddress remote, long timeout) {
+        boolean eof = nbytes < 0 ? true : false;
+        nbytes = nbytes < 0 ? 0 : nbytes;
+        if (remote instanceof InetSocketAddress isa) {
+            commit(start, duration, isa.getHostString(), isa.getAddress().getHostAddress(), isa.getPort(), timeout, nbytes, eof);
+        } else if (remote instanceof UnixDomainSocketAddress udsa) {
+            String path = "[" + udsa.getPath().toString() + "]";
+            commit(start, duration, "Unix domain socket", path, 0, timeout, nbytes, eof);
+        }
+    }
+
+}
diff --git a/tests/test_data/std/jdk/internal/event/SocketWriteEvent.class b/tests/test_data/std/jdk/internal/event/SocketWriteEvent.class
new file mode 100644
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GIT binary patch
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/event/SocketWriteEvent.java b/tests/test_data/std/jdk/internal/event/SocketWriteEvent.java
new file mode 100644
index 00000000..7c56ef82
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/event/SocketWriteEvent.java
@@ -0,0 +1,140 @@
+/*
+ * Copyright (c) 2023, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package jdk.internal.event;
+
+
+import java.net.InetSocketAddress;
+import java.net.SocketAddress;
+import java.net.UnixDomainSocketAddress;
+
+/**
+ * A JFR event for socket write operations.  This event is mirrored in
+ * {@code jdk.jfr.events.SocketWriteEvent } where the metadata for the event is
+ * provided with annotations.  Some of the methods are replaced by generated
+ * methods when jfr is enabled.  Note that the order of the arguments of the
+ * {@link #commit(long, long, String, String, int, long)} method
+ * must be the same as the order of the fields.
+ */
+public class SocketWriteEvent extends Event {
+
+    // THE ORDER OF THE FOLLOWING FIELDS IS IMPORTANT!
+    // The order must match the argument order of the generated commit method.
+    public String host;
+    public String address;
+    public int port;
+    public long bytesWritten;
+
+    /**
+     * Actually commit a socket write event.  This is generated automatically.
+     * The order of the fields must be the same as the parameters in this method.
+     * {@code commit(..., String, String, int, long)}
+     *
+     * @param start     timestamp of the start of the operation
+     * @param duration  time in nanoseconds to complete the operation
+     * @param host      remote host of the transfer
+     * @param address   remote address of the transfer
+     * @param port      remote port of the transfer
+     * @param bytes     number of bytes that were transferred
+     */
+    public static void commit(long start, long duration, String host, String address, int port, long bytes) {
+        // Generated by JFR
+    }
+
+    /**
+     * Determine if an event should be emitted.  The duration of the operation
+     * must exceed some threshold in order to commit the event.  The implementation
+     * of this method is generated automatically if jfr is enabled.
+     *
+     * @param duration  time in nanoseconds to complete the operation
+     * @return  true if the event should be commited
+     */
+    public static boolean shouldCommit(long duration) {
+        // Generated by JFR
+        return false;
+    }
+
+    /**
+     * Determine if this kind of event is enabled.  The implementation
+     * of this method is generated automatically if jfr is enabled.
+     *
+     * @return true if socket write events are enabled, false otherwise
+     */
+    public static boolean enabled() {
+        // Generated by JFR
+        return false;
+    }
+
+    /**
+     * Fetch the current timestamp in nanoseconds.  This method is used
+     * to determine the start and end of an operation.  The implementation
+     * of this method is generated automatically if jfr is enabled.
+     *
+     * @return  the current timestamp value
+     */
+    public static long timestamp() {
+        // Generated by JFR
+        return 0L;
+    }
+
+    /**
+     * Helper method to offer the data needed to potentially commit an event.
+     * The duration of the operation is computed using the current
+     * timestamp and the given start time.  If the duration is meets
+     * or exceeds the configured value (determined by calling the generated method
+     * {@link #shouldCommit(long)}), an event will be emitted by calling
+     * {@link #emit(long, long, long, SocketAddress)}.
+     *
+     * @param start  the start time
+     * @param bytesWritten  how many bytes were sent
+     * @param remote  the address of the remote socket being written to
+     */
+    public static void offer(long start, long bytesWritten, SocketAddress remote) {
+        long duration = timestamp() - start;
+        if (shouldCommit(duration)) {
+            emit(start, duration, bytesWritten, remote);
+        }
+    }
+
+    /**
+     * Helper method to perform a common task of getting event data ready and
+     * then emitting the event by calling
+     * {@link #commit(long, long, String, String, int, long)}.
+     *
+     * @param start  the start time
+     * @param duration the duration
+     * @param bytesWritten  how many bytes were sent
+     * @param remote  the address of the remote socket being written to
+     */
+    public static void emit(long start, long duration, long bytesWritten, SocketAddress remote) {
+        long bytes = bytesWritten < 0 ? 0 : bytesWritten;
+        if (remote instanceof InetSocketAddress isa) {
+            commit(start, duration, isa.getHostString(), isa.getAddress().getHostAddress(), isa.getPort(), bytes);
+        } else if (remote instanceof UnixDomainSocketAddress udsa) {
+            String path = "[" + udsa.getPath().toString() + "]";
+            commit(start, duration, "Unix domain socket", path, 0, bytes);
+        }
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/event/TLSHandshakeEvent.class b/tests/test_data/std/jdk/internal/event/TLSHandshakeEvent.class
new file mode 100644
index 0000000000000000000000000000000000000000..0b2f7be230f5d62d8a633593872766f8bbcb95b9
GIT binary patch
literal 461
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/event/TLSHandshakeEvent.java b/tests/test_data/std/jdk/internal/event/TLSHandshakeEvent.java
new file mode 100644
index 00000000..f763a0e4
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/event/TLSHandshakeEvent.java
@@ -0,0 +1,38 @@
+/*
+ * Copyright (c) 2018, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package jdk.internal.event;
+
+/**
+ * Event recording details of successful TLS handshakes.
+ */
+
+public final class TLSHandshakeEvent extends Event {
+    public String peerHost;
+    public int peerPort;
+    public String protocolVersion;
+    public String cipherSuite;
+    public long certificateId;
+}
diff --git a/tests/test_data/std/jdk/internal/event/ThreadSleepEvent.class b/tests/test_data/std/jdk/internal/event/ThreadSleepEvent.class
new file mode 100644
index 0000000000000000000000000000000000000000..7dad7373f1bee9e533484fb64454f67e8004ef7d
GIT binary patch
literal 515
zcma)2O-lk%6g_W79cP@<J}k4KLZXjFL+hlCOp6d(I0&_SIuCp{K4TpHRc$IrDCh_D
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z<buIGI_}uW!?xhKD8OZ?{m~ZmW5L6AB*gt<Le}s2t$^X6`H%8*ha{F=6j5TZ<=9ue
z8;LNLztuUDA(P0VU|?578>5hDu_={kO@>_&2fChNwK?kXsKaBa{Y5a7^yQerk>g+z
zD-m8RhJ3vjEiQE0qe<Komr@TX|32h&z^5E%w1PoDG*Hz)AVykPBWn_)XA-WH=aFS(
zvnMmKM<NEwggOoEVS~_}7hp3TW21r+MRfCSngOgQST9(5pb#xYIB!3s9k#xeYUw^e
X;SKql8CITQX}zBf`{Y$AW?=gZEfiuO

literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/event/ThreadSleepEvent.java b/tests/test_data/std/jdk/internal/event/ThreadSleepEvent.java
new file mode 100644
index 00000000..ab9b377c
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/event/ThreadSleepEvent.java
@@ -0,0 +1,43 @@
+/*
+ * Copyright (c) 2020, 2022, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package jdk.internal.event;
+
+/**
+ * Event recording thread sleeping.
+ */
+
+public final class ThreadSleepEvent extends Event {
+    private static final ThreadSleepEvent EVENT = new ThreadSleepEvent();
+
+    /**
+     * Returns {@code true} if event is enabled, {@code false} otherwise.
+     */
+    public static boolean isTurnedOn() {
+        return EVENT.isEnabled();
+    }
+
+    public long time;
+}
diff --git a/tests/test_data/std/jdk/internal/event/ThrowableTracer.class b/tests/test_data/std/jdk/internal/event/ThrowableTracer.class
new file mode 100644
index 0000000000000000000000000000000000000000..5a4f10ef6ef003adf94450fe84da3c43d760ff13
GIT binary patch
literal 1641
zcmai!-%{H~6vn@`O@xK8fw~T*Z9)kUOEjpYP13{^;!;TBn&twAX?rKc)>&dn%xaxB
zx$9%(G1AT?o@S;G(1+^u?8+E5Fq83E+JEPq-}%m2{qyf%e*@UUu8jhU7D^7raEW2+
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z{27mxZvyT=k;$*|wq9VcxN&=ASdELigUgs@C@T^1R0YwA*=uX}a}GYnCzN2AM3Er#
z>y37fWKT&EcbmBtlS0!yuyIART_uZ)uzm~qi4sYiL(>*@{g^A`8Wt@qIatPZhJ_0p
z7&|S`z6?Sx87AX?G+HDLhkEsu==ot1hkYrv9)U_C5&A9j>LkQ&!-Z#I#lh!Vgk>Z1
zd(Eh9A`T^w$Z0D+dcc*9Rn#r`3@aD#Zl5N+rvfEXCBoFyLq}h8a8rjab~7(uY0Ymj
zj5XSAEu@PgLuo5H;uN(bV*W!vI^=R+r_V6cNy4Ca5J+L<$QDcLi69XcI~SmgRLZ1l
zGT2IsXj+8?INxcx@(v5`9x$*rA%?x+#S4b%+>xvUsL`mI(x7V)&w6+0fT8|>?&l|b
zm{9FqU+dlmK~9o#;nUsVWO%H+r!R==OA6qgW7ak~KRN7*Np>UxLxodgpOuASd_C+9
zud}_E^kv9*gjTvXGRl-&)mdSUnzcaR3A*ySU1>B%WBO3g^A62?dNaN1y#aegg95&$
zr``tUahIM>b^!O#q*)p3_=Zkt<F_c$54bsFd9P7^iPEb9sxL7)z=y5*6>or#2Kdy>
z=d<}|e_-J?8b9htB@@Y`&ke9dewS(F(xvuL!wTWvp!lm;Bt(zWSfeh~G#=U2i0?8s
zh+=UxA_{EcKAq5`7QQ9wEgEO^dha`$ZPR}YMY~$X4h;)<K!G2Q68e3Z(CmA$>*NNw
zMd5D~_8r2$OGx(&;yjA9c8Unhj=*Nmf$6<dup-!04(k!Q$coe=EM3Iv05>+T7zw`^
z;LEdeRVX4TixP=aA&;kJD`CP21&pITa+h@kF!2`dPj7JhPb_FxELZsjnte}e1$6!c
D4U1`Y

literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/event/ThrowableTracer.java b/tests/test_data/std/jdk/internal/event/ThrowableTracer.java
new file mode 100644
index 00000000..f7076b44
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/event/ThrowableTracer.java
@@ -0,0 +1,64 @@
+/*
+ * Copyright (c) 2012, 2024, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package jdk.internal.event;
+
+import java.util.concurrent.atomic.AtomicLong;
+
+/**
+ * Helper class for exception events.
+ */
+public final class ThrowableTracer {
+
+    private static final AtomicLong numThrowables = new AtomicLong();
+
+    public static void traceError(Class<?> clazz, String message) {
+        if (OutOfMemoryError.class.isAssignableFrom(clazz)) {
+            return;
+        }
+
+        if (ErrorThrownEvent.enabled()) {
+            long timestamp = ErrorThrownEvent.timestamp();
+            ErrorThrownEvent.commit(timestamp, message, clazz);
+        }
+        if (ExceptionThrownEvent.enabled()) {
+            long timestamp = ExceptionThrownEvent.timestamp();
+            ExceptionThrownEvent.commit(timestamp, message, clazz);
+        }
+        numThrowables.incrementAndGet();
+    }
+
+    public static void traceThrowable(Class<?> clazz, String message) {
+        if (ExceptionThrownEvent.enabled()) {
+            long timestamp = ExceptionThrownEvent.timestamp();
+            ExceptionThrownEvent.commit(timestamp, message, clazz);
+        }
+        numThrowables.incrementAndGet();
+    }
+
+    public static void emitStatistics() {
+        long timestamp = ExceptionStatisticsEvent.timestamp();
+        ExceptionStatisticsEvent.commit(timestamp, numThrowables.get());
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/event/VirtualThreadEndEvent.class b/tests/test_data/std/jdk/internal/event/VirtualThreadEndEvent.class
new file mode 100644
index 0000000000000000000000000000000000000000..06e53ccecc5a4d0873739efff9cee098b7eaf5ed
GIT binary patch
literal 538
zcma)2%SyvQ6g`u)rb(l%?^;C>5o#Ca11xSz1f|r4A)vcyGtjAV3Te`>a-)I;1wX)#
z67Qr%y6D2qea?Bz{r>s*0?@{R0|Taof{P+n7;3}l(UU3_iQ=&*CPJm2uOq`sODdUO
zGMJ6C&_)Ti1;<4hE<<ApER;!_@i-VHf=9lJ<}^h=^t%B=v-4lfg+pR%E-I)p*mCSE
z-it+)8+p(>lffPG37<(_(}vwJ6xyRmFjP8HiEj4P6G@<P3>%$MpT{9jr0(a#LOPIR
z21kyAEKwr5RScz8Kc4^Dxf^9kUtCE|P+$7Bb8P{~<j0`X8mQ~jP(^~+q-;_}H>S8n
zoky8bE;grNFH{)Vrl{AzA$BObvj^DCX>8O`rHKX~<r~0yh4qfrXBx2u_$hhV`%^l}
Y{Q%`pl<ucke}kp<76F>CPBR1hzm-aBCjbBd

literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/event/VirtualThreadEndEvent.java b/tests/test_data/std/jdk/internal/event/VirtualThreadEndEvent.java
new file mode 100644
index 00000000..6920eb03
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/event/VirtualThreadEndEvent.java
@@ -0,0 +1,41 @@
+/*
+ * Copyright (c) 2021, 2022, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package jdk.internal.event;
+
+/**
+ * Event recording that a virtual thread has terminated.
+ */
+public class VirtualThreadEndEvent extends Event {
+    private static final VirtualThreadEndEvent EVENT = new VirtualThreadEndEvent();
+
+    /**
+     * Returns {@code true} if event is enabled, {@code false} otherwise.
+     */
+    public static boolean isTurnedOn() {
+        return EVENT.isEnabled();
+    }
+
+    public long javaThreadId;
+}
diff --git a/tests/test_data/std/jdk/internal/event/VirtualThreadPinnedEvent.class b/tests/test_data/std/jdk/internal/event/VirtualThreadPinnedEvent.class
new file mode 100644
index 0000000000000000000000000000000000000000..440c1b581b94232e1b4f483b5caf5eaa45d56354
GIT binary patch
literal 343
zcmb7<u};G<5QhItlLpd45fckY-AXIS1Aw|zFhvN7D!bd9)GMhY8K>{Xgv7uD@KC7d
zsv``XrO*EVJKJ~PKc8O!W;n|bp_3x+BSDvNv94Zov7VhZb<SJ1K7R-#bnnHApAtHw
z>oUa=Ve(6HDbBa1p06C6>RGJi>To}vH5C&Eg;;)SHw$)iv#8ZMFPf#POXDQygBkmk
zyb*4SfBbPr$X=S(E%{Nx!<T<GbGtTMgCSBKJ_PB~@s-D_^1TL<@dxN#jR=`Cq=75+
Rl>PlV(fvdf;Zzx6umc#JRS5t9

literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/event/VirtualThreadPinnedEvent.java b/tests/test_data/std/jdk/internal/event/VirtualThreadPinnedEvent.java
new file mode 100644
index 00000000..73746dc4
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/event/VirtualThreadPinnedEvent.java
@@ -0,0 +1,31 @@
+/*
+ * Copyright (c) 2021, 2022, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package jdk.internal.event;
+
+/**
+ * Event recording that a virtual thread has parked on its carrier thread.
+ */
+public class VirtualThreadPinnedEvent extends Event {
+}
diff --git a/tests/test_data/std/jdk/internal/event/VirtualThreadStartEvent.class b/tests/test_data/std/jdk/internal/event/VirtualThreadStartEvent.class
new file mode 100644
index 0000000000000000000000000000000000000000..a189b825a34f1f48251e2c63f8db9c71ff190875
GIT binary patch
literal 544
zcma)2+e!jK82)BgTX)^k&Sp|X1SQcvK+=tDP>5Z)EY#iT4mh^0Fs?pTHx(ol^Z-3n
z^v^2cML{?JalXU+pI>hu0Gg;dFko89xyWOQp)!c>J(;9JB|P@TL?o%_>&URwkcmt$
z7|i37&_)5a1;<4ZE<^nnSSVFG=5f$hf=8W{t8`A3_d~xOFr2pjk2-fqaK%LlWd>W0
z{DgO75oKoX^v+~(2YkY3a#yrr*9^JlFcJ)<mP|x@{LmFD&^U&**09IpkSnSC`7oFE
z<%q$NqhPEO5#1yVg+?!)|J&&d$EqhTr6#ET@x3!`0te*CpaUDI>H|?ll31r~Qbm`h
zxIvvqnNiNyr(jQ17}%t!*T5dOD7v!;*v@EdR8Xdg2JdGZz<P%DiseTdu?6@MdD!_;
aI?Vh4#dj2Lr&xV~rS%p8ny*ST1H0e9Z*CF*

literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/event/VirtualThreadStartEvent.java b/tests/test_data/std/jdk/internal/event/VirtualThreadStartEvent.java
new file mode 100644
index 00000000..5e80e8ac
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/event/VirtualThreadStartEvent.java
@@ -0,0 +1,41 @@
+/*
+ * Copyright (c) 2021, 2022, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package jdk.internal.event;
+
+/**
+ * Event recording that a virtual thread has been started.
+ */
+public class VirtualThreadStartEvent extends Event {
+    private static final VirtualThreadStartEvent EVENT = new VirtualThreadStartEvent();
+
+    /**
+     * Returns {@code true} if event is enabled, {@code false} otherwise.
+     */
+    public static boolean isTurnedOn() {
+        return EVENT.isEnabled();
+    }
+
+    public long javaThreadId;
+}
diff --git a/tests/test_data/std/jdk/internal/event/VirtualThreadSubmitFailedEvent.class b/tests/test_data/std/jdk/internal/event/VirtualThreadSubmitFailedEvent.class
new file mode 100644
index 0000000000000000000000000000000000000000..0dcb7c9065d0e86bd1540358ed7e022f64547ab7
GIT binary patch
literal 436
zcmb7AJx{|h6ug(F4TM0;$H0VySb%{DF@jhsDuDt^s_af;r7o_6T&Lo1F(EPV1Nc#h
zm$oB9V({HNzti*ieSLp?0vO^TgojQ5KSCEh!r`=hj+JrJ8lhvkkjBM#EfRV+$|!eB
z=$xKq0X7JiznC*+T_f~(Vx=h4CZ8!c5=zT*Jtdlog;;g(O9DL*2J*F#FHY6wQO@V0
zl7zjawZ&SPDo&kMrn)Bh!@A^NKT$?LHM3mWvB>q(T^B-U!m3uUFMT&rbHY{f?~wdd
znAVLg<cNb4PX7MWMH>~z2zZm=L)b*f6=4g}lBwM->upvsGckA1-$8F&c-UcV+rSa}
RjM2(~0d`sOG8jGV{{RnbZqfh%

literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/event/VirtualThreadSubmitFailedEvent.java b/tests/test_data/std/jdk/internal/event/VirtualThreadSubmitFailedEvent.java
new file mode 100644
index 00000000..e12e4008
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/event/VirtualThreadSubmitFailedEvent.java
@@ -0,0 +1,33 @@
+/*
+ * Copyright (c) 2021, 2022, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package jdk.internal.event;
+
+/**
+ * Event recording when an attempt to submit the task for a virtual thread failed.
+ */
+public class VirtualThreadSubmitFailedEvent extends Event {
+    public long javaThreadId;
+    public String exceptionMessage;
+}
diff --git a/tests/test_data/std/jdk/internal/event/X509CertificateEvent.class b/tests/test_data/std/jdk/internal/event/X509CertificateEvent.class
new file mode 100644
index 0000000000000000000000000000000000000000..37529650800c6729c3dc6c6ff29056821bec9e2d
GIT binary patch
literal 718
zcma)4OHUL*5dLZ(%<eD<z5yR7sDKAY4;~D}%VtS18$7UX&|B|JyW30CLwb5P;Xip%
z6G=4T2k@he)x$(NaPU%Jy}zpJKL7pm3_u6ZLex+X(1_5)3}JDS9>&TzX^qgaoJ!;3
zu9t+FZDo{uOQ>&b4%%p;9UzP_i-@p(McKjYmv1`KI`vs4!pW*jvpeYS^$DB3|18-G
znd(}Ec`OjxD(@OG)G{r{_~c`Cb_+eqta9Tc!j0ZUOhv4P8O8g~Dl^(5M7gv|=)K}-
zC@mq#i{V5jekqmbMd><}C;gLS$<0{nNi%X|0__s!l7CC=GB3U3oT<<%-LV-HhNb?&
zIHd`VPL^_y`JOWJg01hz^<!m;&;!9^uw6MDZme?dpz?lUjZEJgLTfwG)uF@vtgwmP
zQNF>_Rrh@1cf~8dLXDp@#Ik=5)|d}BOT1O#?F#Qyc(=kuER}i7xL4x+3LlhM=T7`D
zSU%)v%t(yQ=ck~rtkkf=(uaY^c*HWgNMOs4(Z(tk*yD>=$_NmAL+}H0U)V*L$~Sn2
fwZBYj<vzgdFSI_M;`(<4p6_zODqBz3SHsgk0-%ny

literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/event/X509CertificateEvent.java b/tests/test_data/std/jdk/internal/event/X509CertificateEvent.java
new file mode 100644
index 00000000..5b668ca2
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/event/X509CertificateEvent.java
@@ -0,0 +1,52 @@
+/*
+ * Copyright (c) 2018, 2022, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package jdk.internal.event;
+
+
+/**
+ * Event recording details of X.509 Certificate.
+ */
+
+public final class X509CertificateEvent extends Event {
+    private static final X509CertificateEvent EVENT = new X509CertificateEvent();
+
+    /**
+     * Returns {@code true} if event is enabled, {@code false} otherwise.
+     */
+    public static boolean isTurnedOn() {
+        return EVENT.isEnabled();
+    }
+
+    public String algorithm;
+    public String serialNumber;
+    public String subject;
+    public String issuer;
+    public String keyType;
+    public int keyLength;
+    public long certificateId;
+    public long validFrom;
+    public long validUntil;
+}
diff --git a/tests/test_data/std/jdk/internal/event/X509ValidationEvent.class b/tests/test_data/std/jdk/internal/event/X509ValidationEvent.class
new file mode 100644
index 0000000000000000000000000000000000000000..c18abcbf0b562ac96c4af555d98463d861a19a18
GIT binary patch
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HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/event/X509ValidationEvent.java b/tests/test_data/std/jdk/internal/event/X509ValidationEvent.java
new file mode 100644
index 00000000..854b1a05
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/event/X509ValidationEvent.java
@@ -0,0 +1,37 @@
+/*
+ * Copyright (c) 2018, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package jdk.internal.event;
+
+/**
+ * Event recording details of X.509 Certificate serial numbers
+ * used in X509 cert path validation.
+ */
+
+public final class X509ValidationEvent extends Event {
+    public long certificateId;
+    public int certificatePosition;
+    public long validationCounter;
+}
diff --git a/tests/test_data/std/jdk/internal/foreign/AbstractMemorySegmentImpl$SegmentSplitter.class b/tests/test_data/std/jdk/internal/foreign/AbstractMemorySegmentImpl$SegmentSplitter.class
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index 0000000000000000000000000000000000000000..eb83618173e5b6e88a3dae70d6c30abbaef193f6
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new file mode 100644
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diff --git a/tests/test_data/std/jdk/internal/foreign/AbstractMemorySegmentImpl.java b/tests/test_data/std/jdk/internal/foreign/AbstractMemorySegmentImpl.java
new file mode 100644
index 00000000..325dbe10
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/foreign/AbstractMemorySegmentImpl.java
@@ -0,0 +1,985 @@
+/*
+ * Copyright (c) 2020, 2024, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package jdk.internal.foreign;
+
+import java.lang.foreign.*;
+import java.lang.reflect.Array;
+import java.nio.Buffer;
+import java.nio.ByteBuffer;
+import java.nio.ByteOrder;
+import java.nio.CharBuffer;
+import java.nio.DoubleBuffer;
+import java.nio.FloatBuffer;
+import java.nio.IntBuffer;
+import java.nio.LongBuffer;
+import java.nio.ShortBuffer;
+import java.nio.charset.Charset;
+import java.util.*;
+import java.util.function.BiFunction;
+import java.util.function.Consumer;
+import java.util.function.Function;
+import java.util.function.IntFunction;
+import java.util.stream.Stream;
+import java.util.stream.StreamSupport;
+
+import jdk.internal.access.JavaNioAccess;
+import jdk.internal.access.SharedSecrets;
+import jdk.internal.access.foreign.UnmapperProxy;
+import jdk.internal.misc.ScopedMemoryAccess;
+import jdk.internal.reflect.CallerSensitive;
+import jdk.internal.reflect.Reflection;
+import jdk.internal.util.ArraysSupport;
+import jdk.internal.util.Preconditions;
+import jdk.internal.vm.annotation.ForceInline;
+import sun.nio.ch.DirectBuffer;
+
+import static java.lang.foreign.ValueLayout.JAVA_BYTE;
+
+/**
+ * This abstract class provides an immutable implementation for the {@code MemorySegment} interface. This class contains information
+ * about the segment's spatial and temporal bounds; each memory segment implementation is associated with an owner thread which is set at creation time.
+ * Access to certain sensitive operations on the memory segment will fail with {@code IllegalStateException} if the
+ * segment is either in an invalid state (e.g. it has already been closed) or if access occurs from a thread other
+ * than the owner thread. See {@link MemorySessionImpl} for more details on management of temporal bounds. Subclasses
+ * are defined for each memory segment kind, see {@link NativeMemorySegmentImpl}, {@link HeapMemorySegmentImpl} and
+ * {@link MappedMemorySegmentImpl}.
+ */
+public abstract sealed class AbstractMemorySegmentImpl
+        implements MemorySegment, SegmentAllocator, BiFunction<String, List<Number>, RuntimeException>
+        permits HeapMemorySegmentImpl, NativeMemorySegmentImpl {
+
+    private static final ScopedMemoryAccess SCOPED_MEMORY_ACCESS = ScopedMemoryAccess.getScopedMemoryAccess();
+
+    static final JavaNioAccess NIO_ACCESS = SharedSecrets.getJavaNioAccess();
+
+    final long length;
+    final boolean readOnly;
+    final MemorySessionImpl scope;
+
+    @ForceInline
+    AbstractMemorySegmentImpl(long length, boolean readOnly, MemorySessionImpl scope) {
+        this.length = length;
+        this.readOnly = readOnly;
+        this.scope = scope;
+    }
+
+    abstract AbstractMemorySegmentImpl dup(long offset, long size, boolean readOnly, MemorySessionImpl scope);
+
+    abstract ByteBuffer makeByteBuffer();
+
+    @Override
+    public AbstractMemorySegmentImpl asReadOnly() {
+        return dup(0, length, true, scope);
+    }
+
+    @Override
+    public boolean isReadOnly() {
+        return readOnly;
+    }
+
+    @Override
+    public AbstractMemorySegmentImpl asSlice(long offset, long newSize) {
+        checkBounds(offset, newSize);
+        return asSliceNoCheck(offset, newSize);
+    }
+
+    @Override
+    public AbstractMemorySegmentImpl asSlice(long offset) {
+        checkBounds(offset, 0);
+        return asSliceNoCheck(offset, length - offset);
+    }
+
+    @Override
+    public MemorySegment asSlice(long offset, long newSize, long byteAlignment) {
+        checkBounds(offset, newSize);
+        Utils.checkAlign(byteAlignment);
+
+        if (!isAlignedForElement(offset, byteAlignment)) {
+            throw new IllegalArgumentException("Target offset incompatible with alignment constraints");
+        }
+        return asSliceNoCheck(offset, newSize);
+    }
+
+    @Override
+    public MemorySegment asSlice(long offset, MemoryLayout layout) {
+        Objects.requireNonNull(layout);
+        return asSlice(offset, layout.byteSize(), layout.byteAlignment());
+    }
+
+    @Override
+    @CallerSensitive
+    public final MemorySegment reinterpret(long newSize, Arena arena, Consumer<MemorySegment> cleanup) {
+        Objects.requireNonNull(arena);
+        return reinterpretInternal(Reflection.getCallerClass(), newSize,
+                MemorySessionImpl.toMemorySession(arena), cleanup);
+    }
+
+    @Override
+    @CallerSensitive
+    public final MemorySegment reinterpret(long newSize) {
+        return reinterpretInternal(Reflection.getCallerClass(), newSize, scope, null);
+    }
+
+    @Override
+    @CallerSensitive
+    public final MemorySegment reinterpret(Arena arena, Consumer<MemorySegment> cleanup) {
+        Objects.requireNonNull(arena);
+        return reinterpretInternal(Reflection.getCallerClass(), byteSize(),
+                MemorySessionImpl.toMemorySession(arena), cleanup);
+    }
+
+    public MemorySegment reinterpretInternal(Class<?> callerClass, long newSize, Scope scope, Consumer<MemorySegment> cleanup) {
+        Reflection.ensureNativeAccess(callerClass, MemorySegment.class, "reinterpret");
+        Utils.checkNonNegativeArgument(newSize, "newSize");
+        if (!isNative()) throw new UnsupportedOperationException("Not a native segment");
+        Runnable action = cleanup != null ?
+                () -> cleanup.accept(SegmentFactories.makeNativeSegmentUnchecked(address(), newSize)) :
+                null;
+        return SegmentFactories.makeNativeSegmentUnchecked(address(), newSize,
+                (MemorySessionImpl)scope, readOnly, action);
+    }
+
+    private AbstractMemorySegmentImpl asSliceNoCheck(long offset, long newSize) {
+        return dup(offset, newSize, readOnly, scope);
+    }
+
+    @Override
+    public Spliterator<MemorySegment> spliterator(MemoryLayout elementLayout) {
+        Objects.requireNonNull(elementLayout);
+        if (elementLayout.byteSize() == 0) {
+            throw new IllegalArgumentException("Element layout size cannot be zero");
+        }
+        Utils.checkElementAlignment(elementLayout, "Element layout size is not multiple of alignment");
+        if (!isAlignedForElement(0, elementLayout)) {
+            throw new IllegalArgumentException("Incompatible alignment constraints");
+        }
+        if ((byteSize() % elementLayout.byteSize()) != 0) {
+            throw new IllegalArgumentException("Segment size is not a multiple of layout size");
+        }
+        return new SegmentSplitter(elementLayout.byteSize(), byteSize() / elementLayout.byteSize(),
+                this);
+    }
+
+    @Override
+    public Stream<MemorySegment> elements(MemoryLayout elementLayout) {
+        return StreamSupport.stream(spliterator(elementLayout), false);
+    }
+
+    @Override
+    public final MemorySegment fill(byte value){
+        checkAccess(0, length, false);
+        SCOPED_MEMORY_ACCESS.setMemory(sessionImpl(), unsafeGetBase(), unsafeGetOffset(), length, value);
+        return this;
+    }
+
+    @Override
+    public MemorySegment allocate(long byteSize, long byteAlignment) {
+        Utils.checkAllocationSizeAndAlign(byteSize, byteAlignment);
+        return asSlice(0, byteSize, byteAlignment);
+    }
+
+    /**
+     * Mismatch over long lengths.
+     */
+    public static long vectorizedMismatchLargeForBytes(MemorySessionImpl aSession, MemorySessionImpl bSession,
+                                                        Object a, long aOffset,
+                                                        Object b, long bOffset,
+                                                        long length) {
+        long off = 0;
+        long remaining = length;
+        int i, size;
+        boolean lastSubRange = false;
+        while (remaining > 7 && !lastSubRange) {
+            if (remaining > Integer.MAX_VALUE) {
+                size = Integer.MAX_VALUE;
+            } else {
+                size = (int) remaining;
+                lastSubRange = true;
+            }
+            i = SCOPED_MEMORY_ACCESS.vectorizedMismatch(aSession, bSession,
+                    a, aOffset + off,
+                    b, bOffset + off,
+                    size, ArraysSupport.LOG2_ARRAY_BYTE_INDEX_SCALE);
+            if (i >= 0)
+                return off + i;
+
+            i = size - ~i;
+            off += i;
+            remaining -= i;
+        }
+        return ~remaining;
+    }
+
+    @Override
+    public final ByteBuffer asByteBuffer() {
+        checkArraySize("ByteBuffer", 1);
+        ByteBuffer _bb = makeByteBuffer();
+        if (readOnly) {
+            //session is IMMUTABLE - obtain a RO byte buffer
+            _bb = _bb.asReadOnlyBuffer();
+        }
+        return _bb;
+    }
+
+    @Override
+    public final long byteSize() {
+        return length;
+    }
+
+    @Override
+    public boolean isMapped() {
+        return false;
+    }
+
+    @Override
+    public boolean isNative() {
+        return false;
+    }
+
+    @Override
+    public final Optional<MemorySegment> asOverlappingSlice(MemorySegment other) {
+        AbstractMemorySegmentImpl that = (AbstractMemorySegmentImpl)Objects.requireNonNull(other);
+        if (unsafeGetBase() == that.unsafeGetBase()) {  // both either native or heap
+            final long thisStart = this.unsafeGetOffset();
+            final long thatStart = that.unsafeGetOffset();
+            final long thisEnd = thisStart + this.byteSize();
+            final long thatEnd = thatStart + that.byteSize();
+
+            if (thisStart < thatEnd && thisEnd > thatStart) {  //overlap occurs
+                long offsetToThat = that.address() - this.address();
+                long newOffset = offsetToThat >= 0 ? offsetToThat : 0;
+                return Optional.of(asSlice(newOffset, Math.min(this.byteSize() - newOffset, that.byteSize() + offsetToThat)));
+            }
+        }
+        return Optional.empty();
+    }
+
+    @Override
+    public MemorySegment copyFrom(MemorySegment src) {
+        MemorySegment.copy(src, 0, this, 0, src.byteSize());
+        return this;
+    }
+
+    @Override
+    public long mismatch(MemorySegment other) {
+        Objects.requireNonNull(other);
+        return MemorySegment.mismatch(this, 0, byteSize(), other, 0, other.byteSize());
+    }
+
+    @Override
+    public void load() {
+        throw notAMappedSegment();
+    }
+
+    @Override
+    public void unload() {
+        throw notAMappedSegment();
+    }
+
+    @Override
+    public boolean isLoaded() {
+        throw notAMappedSegment();
+    }
+
+    @Override
+    public void force() {
+        throw notAMappedSegment();
+    }
+
+    private static UnsupportedOperationException notAMappedSegment() {
+        throw new UnsupportedOperationException("Not a mapped segment");
+    }
+
+    @Override
+    public final byte[] toArray(ValueLayout.OfByte elementLayout) {
+        return toArray(byte[].class, elementLayout, byte[]::new, MemorySegment::ofArray);
+    }
+
+    @Override
+    public final short[] toArray(ValueLayout.OfShort elementLayout) {
+        return toArray(short[].class, elementLayout, short[]::new, MemorySegment::ofArray);
+    }
+
+    @Override
+    public final char[] toArray(ValueLayout.OfChar elementLayout) {
+        return toArray(char[].class, elementLayout, char[]::new, MemorySegment::ofArray);
+    }
+
+    @Override
+    public final int[] toArray(ValueLayout.OfInt elementLayout) {
+        return toArray(int[].class, elementLayout, int[]::new, MemorySegment::ofArray);
+    }
+
+    @Override
+    public final float[] toArray(ValueLayout.OfFloat elementLayout) {
+        return toArray(float[].class, elementLayout, float[]::new, MemorySegment::ofArray);
+    }
+
+    @Override
+    public final long[] toArray(ValueLayout.OfLong elementLayout) {
+        return toArray(long[].class, elementLayout, long[]::new, MemorySegment::ofArray);
+    }
+
+    @Override
+    public final double[] toArray(ValueLayout.OfDouble elementLayout) {
+        return toArray(double[].class, elementLayout, double[]::new, MemorySegment::ofArray);
+    }
+
+    private <Z> Z toArray(Class<Z> arrayClass, ValueLayout elemLayout, IntFunction<Z> arrayFactory, Function<Z, MemorySegment> segmentFactory) {
+        int size = checkArraySize(arrayClass.getSimpleName(), (int)elemLayout.byteSize());
+        Z arr = arrayFactory.apply(size);
+        MemorySegment arrSegment = segmentFactory.apply(arr);
+        MemorySegment.copy(this, elemLayout, 0, arrSegment, elemLayout.withOrder(ByteOrder.nativeOrder()), 0, size);
+        return arr;
+    }
+
+    @ForceInline
+    public void checkReadOnly(boolean readOnly) {
+        if (!readOnly && this.readOnly) {
+            throw new IllegalArgumentException("Attempt to write a read-only segment");
+        }
+    }
+
+    @ForceInline
+    public void checkAccess(long offset, long length, boolean readOnly) {
+        checkReadOnly(readOnly);
+        checkBounds(offset, length);
+    }
+
+    public void checkValidState() {
+        sessionImpl().checkValidState();
+    }
+
+    public abstract long unsafeGetOffset();
+
+    public abstract Object unsafeGetBase();
+
+    // Helper methods
+
+    public abstract long maxAlignMask();
+
+    @ForceInline
+    public final boolean isAlignedForElement(long offset, MemoryLayout layout) {
+        return isAlignedForElement(offset, layout.byteAlignment());
+    }
+
+    @ForceInline
+    public final boolean isAlignedForElement(long offset, long byteAlignment) {
+        return (((unsafeGetOffset() + offset) | maxAlignMask()) & (byteAlignment - 1)) == 0;
+    }
+
+    private int checkArraySize(String typeName, int elemSize) {
+        // elemSize is guaranteed to be a power of two, so we can use an alignment check
+        if (!Utils.isAligned(length, elemSize)) {
+            throw new IllegalStateException(String.format("Segment size is not a multiple of %d. Size: %d", elemSize, length));
+        }
+        long arraySize = length / elemSize;
+        if (arraySize > (Integer.MAX_VALUE - 8)) { //conservative check
+            throw new IllegalStateException(String.format("Segment is too large to wrap as %s. Size: %d", typeName, length));
+        }
+        return (int)arraySize;
+    }
+
+    @ForceInline
+    void checkBounds(long offset, long length) {
+        if (length > 0) {
+            Preconditions.checkIndex(offset, this.length - length + 1, this);
+        } else if (length < 0 || offset < 0 ||
+                offset > this.length - length) {
+            throw outOfBoundException(offset, length);
+        }
+    }
+
+    @Override
+    public RuntimeException apply(String s, List<Number> numbers) {
+        long offset = numbers.get(0).longValue();
+        long length = byteSize() - numbers.get(1).longValue() + 1;
+        return outOfBoundException(offset, length);
+    }
+
+    @Override
+    public Scope scope() {
+        return scope;
+    }
+
+    @Override
+    public boolean isAccessibleBy(Thread thread) {
+        return sessionImpl().isAccessibleBy(thread);
+    }
+
+    @ForceInline
+    public final MemorySessionImpl sessionImpl() {
+        return scope;
+    }
+
+    private IndexOutOfBoundsException outOfBoundException(long offset, long length) {
+        return new IndexOutOfBoundsException(String.format("Out of bound access on segment %s; new offset = %d; new length = %d",
+                        this, offset, length));
+    }
+
+    static class SegmentSplitter implements Spliterator<MemorySegment> {
+        AbstractMemorySegmentImpl segment;
+        long elemCount;
+        final long elementSize;
+        long currentIndex;
+
+        SegmentSplitter(long elementSize, long elemCount, AbstractMemorySegmentImpl segment) {
+            this.segment = segment;
+            this.elementSize = elementSize;
+            this.elemCount = elemCount;
+        }
+
+        @Override
+        public SegmentSplitter trySplit() {
+            if (currentIndex == 0 && elemCount > 1) {
+                AbstractMemorySegmentImpl parent = segment;
+                long rem = elemCount % 2;
+                long split = elemCount / 2;
+                long lobound = split * elementSize;
+                long hibound = lobound + (rem * elementSize);
+                elemCount  = split + rem;
+                segment = parent.asSliceNoCheck(lobound, hibound);
+                return new SegmentSplitter(elementSize, split, parent.asSliceNoCheck(0, lobound));
+            } else {
+                return null;
+            }
+        }
+
+        @Override
+        public boolean tryAdvance(Consumer<? super MemorySegment> action) {
+            Objects.requireNonNull(action);
+            if (currentIndex < elemCount) {
+                AbstractMemorySegmentImpl acquired = segment;
+                try {
+                    action.accept(acquired.asSliceNoCheck(currentIndex * elementSize, elementSize));
+                } finally {
+                    currentIndex++;
+                    if (currentIndex == elemCount) {
+                        segment = null;
+                    }
+                }
+                return true;
+            } else {
+                return false;
+            }
+        }
+
+        @Override
+        public void forEachRemaining(Consumer<? super MemorySegment> action) {
+            Objects.requireNonNull(action);
+            if (currentIndex < elemCount) {
+                AbstractMemorySegmentImpl acquired = segment;
+                try {
+                    for (long i = currentIndex ; i < elemCount ; i++) {
+                        action.accept(acquired.asSliceNoCheck(i * elementSize, elementSize));
+                    }
+                } finally {
+                    currentIndex = elemCount;
+                    segment = null;
+                }
+            }
+        }
+
+        @Override
+        public long estimateSize() {
+            return elemCount;
+        }
+
+        @Override
+        public int characteristics() {
+            return NONNULL | SUBSIZED | SIZED | IMMUTABLE | ORDERED;
+        }
+    }
+
+    // Object methods
+
+    @Override
+    public String toString() {
+        return "MemorySegment{ " +
+                heapBase().map(hb -> "heapBase: " + hb + ", ").orElse("") +
+                "address: " + Utils.toHexString(address()) +
+                ", byteSize: " + length +
+                " }";
+    }
+
+    @Override
+    public boolean equals(Object o) {
+        return o instanceof AbstractMemorySegmentImpl that &&
+                unsafeGetBase() == that.unsafeGetBase() &&
+                unsafeGetOffset() == that.unsafeGetOffset();
+    }
+
+    @Override
+    public int hashCode() {
+        return Objects.hash(
+                unsafeGetOffset(),
+                unsafeGetBase());
+    }
+
+    public static AbstractMemorySegmentImpl ofBuffer(Buffer bb) {
+        Objects.requireNonNull(bb);
+        Object base = NIO_ACCESS.getBufferBase(bb);
+        if (!bb.isDirect() && base == null) {
+            throw new IllegalArgumentException("The provided heap buffer is not backed by an array.");
+        }
+        long bbAddress = NIO_ACCESS.getBufferAddress(bb);
+        UnmapperProxy unmapper = NIO_ACCESS.unmapper(bb);
+
+        int pos = bb.position();
+        int limit = bb.limit();
+        int size = limit - pos;
+
+        AbstractMemorySegmentImpl bufferSegment = (AbstractMemorySegmentImpl) NIO_ACCESS.bufferSegment(bb);
+        boolean readOnly = bb.isReadOnly();
+        int scaleFactor = getScaleFactor(bb);
+        final MemorySessionImpl bufferScope;
+        if (bufferSegment != null) {
+            bufferScope = bufferSegment.scope;
+        } else {
+            bufferScope = MemorySessionImpl.createHeap(bufferRef(bb));
+        }
+        long off = bbAddress + ((long)pos << scaleFactor);
+        long len = (long)size << scaleFactor;
+        if (base != null) {
+            return switch (base) {
+                case byte[]   _ -> new HeapMemorySegmentImpl.OfByte(off, base, len, readOnly, bufferScope);
+                case short[]  _ -> new HeapMemorySegmentImpl.OfShort(off, base, len, readOnly, bufferScope);
+                case char[]   _ -> new HeapMemorySegmentImpl.OfChar(off, base, len, readOnly, bufferScope);
+                case int[]    _ -> new HeapMemorySegmentImpl.OfInt(off, base, len, readOnly, bufferScope);
+                case float[]  _ -> new HeapMemorySegmentImpl.OfFloat(off, base, len, readOnly, bufferScope);
+                case long[]   _ -> new HeapMemorySegmentImpl.OfLong(off, base, len, readOnly, bufferScope);
+                case double[] _ -> new HeapMemorySegmentImpl.OfDouble(off, base, len, readOnly, bufferScope);
+                default         -> throw new AssertionError("Cannot get here");
+            };
+        } else if (unmapper == null) {
+            return new NativeMemorySegmentImpl(off, len, readOnly, bufferScope);
+        } else {
+            return new MappedMemorySegmentImpl(off, unmapper, len, readOnly, bufferScope);
+        }
+    }
+
+    private static Object bufferRef(Buffer buffer) {
+        if (buffer instanceof DirectBuffer directBuffer) {
+            // direct buffer, return either the buffer attachment (for slices and views), or the buffer itself
+            return directBuffer.attachment() != null ?
+                    directBuffer.attachment() : directBuffer;
+        } else {
+            // heap buffer, return the underlying array
+            return NIO_ACCESS.getBufferBase(buffer);
+        }
+    }
+
+    @ForceInline
+    public static void copy(MemorySegment srcSegment, ValueLayout srcElementLayout, long srcOffset,
+                            MemorySegment dstSegment, ValueLayout dstElementLayout, long dstOffset,
+                            long elementCount) {
+
+        Utils.checkNonNegativeIndex(elementCount, "elementCount");
+        AbstractMemorySegmentImpl srcImpl = (AbstractMemorySegmentImpl)srcSegment;
+        AbstractMemorySegmentImpl dstImpl = (AbstractMemorySegmentImpl)dstSegment;
+        if (srcElementLayout.byteSize() != dstElementLayout.byteSize()) {
+            throw new IllegalArgumentException("Source and destination layouts must have same size");
+        }
+        Utils.checkElementAlignment(srcElementLayout, "Source layout alignment greater than its size");
+        Utils.checkElementAlignment(dstElementLayout, "Destination layout alignment greater than its size");
+        if (!srcImpl.isAlignedForElement(srcOffset, srcElementLayout)) {
+            throw new IllegalArgumentException("Source segment incompatible with alignment constraints");
+        }
+        if (!dstImpl.isAlignedForElement(dstOffset, dstElementLayout)) {
+            throw new IllegalArgumentException("Destination segment incompatible with alignment constraints");
+        }
+        long size = elementCount * srcElementLayout.byteSize();
+        srcImpl.checkAccess(srcOffset, size, true);
+        dstImpl.checkAccess(dstOffset, size, false);
+        if (srcElementLayout.byteSize() == 1 || srcElementLayout.order() == dstElementLayout.order()) {
+            ScopedMemoryAccess.getScopedMemoryAccess().copyMemory(srcImpl.sessionImpl(), dstImpl.sessionImpl(),
+                    srcImpl.unsafeGetBase(), srcImpl.unsafeGetOffset() + srcOffset,
+                    dstImpl.unsafeGetBase(), dstImpl.unsafeGetOffset() + dstOffset, size);
+        } else {
+            ScopedMemoryAccess.getScopedMemoryAccess().copySwapMemory(srcImpl.sessionImpl(), dstImpl.sessionImpl(),
+                    srcImpl.unsafeGetBase(), srcImpl.unsafeGetOffset() + srcOffset,
+                    dstImpl.unsafeGetBase(), dstImpl.unsafeGetOffset() + dstOffset, size, srcElementLayout.byteSize());
+        }
+    }
+
+    @ForceInline
+    public static void copy(MemorySegment srcSegment, ValueLayout srcLayout, long srcOffset,
+                            Object dstArray, int dstIndex,
+                            int elementCount) {
+        Utils.checkNonNegativeIndex(elementCount, "elementCount");
+        var dstInfo = Utils.BaseAndScale.of(dstArray);
+        if (dstArray.getClass().componentType() != srcLayout.carrier()) {
+            throw new IllegalArgumentException("Incompatible value layout: " + srcLayout);
+        }
+        AbstractMemorySegmentImpl srcImpl = (AbstractMemorySegmentImpl)srcSegment;
+        Utils.checkElementAlignment(srcLayout, "Source layout alignment greater than its size");
+        if (!srcImpl.isAlignedForElement(srcOffset, srcLayout)) {
+            throw new IllegalArgumentException("Source segment incompatible with alignment constraints");
+        }
+        srcImpl.checkAccess(srcOffset, elementCount * dstInfo.scale(), true);
+        Objects.checkFromIndexSize(dstIndex, elementCount, Array.getLength(dstArray));
+        if (dstInfo.scale() == 1 || srcLayout.order() == ByteOrder.nativeOrder()) {
+            ScopedMemoryAccess.getScopedMemoryAccess().copyMemory(srcImpl.sessionImpl(), null,
+                    srcImpl.unsafeGetBase(), srcImpl.unsafeGetOffset() + srcOffset,
+                    dstArray, dstInfo.base() + (dstIndex * dstInfo.scale()), elementCount * dstInfo.scale());
+        } else {
+            ScopedMemoryAccess.getScopedMemoryAccess().copySwapMemory(srcImpl.sessionImpl(), null,
+                    srcImpl.unsafeGetBase(), srcImpl.unsafeGetOffset() + srcOffset,
+                    dstArray, dstInfo.base() + (dstIndex * dstInfo.scale()), elementCount * dstInfo.scale(), dstInfo.scale());
+        }
+    }
+
+    @ForceInline
+    public static void copy(Object srcArray, int srcIndex,
+                            MemorySegment dstSegment, ValueLayout dstLayout, long dstOffset,
+                            int elementCount) {
+        var srcInfo = Utils.BaseAndScale.of(srcArray);
+        if (srcArray.getClass().componentType() != dstLayout.carrier()) {
+            throw new IllegalArgumentException("Incompatible value layout: " + dstLayout);
+        }
+        Objects.checkFromIndexSize(srcIndex, elementCount, Array.getLength(srcArray));
+        AbstractMemorySegmentImpl destImpl = (AbstractMemorySegmentImpl)dstSegment;
+        Utils.checkElementAlignment(dstLayout, "Destination layout alignment greater than its size");
+        if (!destImpl.isAlignedForElement(dstOffset, dstLayout)) {
+            throw new IllegalArgumentException("Destination segment incompatible with alignment constraints");
+        }
+        destImpl.checkAccess(dstOffset, elementCount * srcInfo.scale(), false);
+        if (srcInfo.scale() == 1 || dstLayout.order() == ByteOrder.nativeOrder()) {
+            ScopedMemoryAccess.getScopedMemoryAccess().copyMemory(null, destImpl.sessionImpl(),
+                    srcArray, srcInfo.base() + (srcIndex * srcInfo.scale()),
+                    destImpl.unsafeGetBase(), destImpl.unsafeGetOffset() + dstOffset, elementCount * srcInfo.scale());
+        } else {
+            ScopedMemoryAccess.getScopedMemoryAccess().copySwapMemory(null, destImpl.sessionImpl(),
+                    srcArray, srcInfo.base() + (srcIndex * srcInfo.scale()),
+                    destImpl.unsafeGetBase(), destImpl.unsafeGetOffset() + dstOffset, elementCount * srcInfo.scale(), srcInfo.scale());
+        }
+    }
+
+    public static long mismatch(MemorySegment srcSegment, long srcFromOffset, long srcToOffset,
+                                MemorySegment dstSegment, long dstFromOffset, long dstToOffset) {
+        AbstractMemorySegmentImpl srcImpl = (AbstractMemorySegmentImpl)Objects.requireNonNull(srcSegment);
+        AbstractMemorySegmentImpl dstImpl = (AbstractMemorySegmentImpl)Objects.requireNonNull(dstSegment);
+        long srcBytes = srcToOffset - srcFromOffset;
+        long dstBytes = dstToOffset - dstFromOffset;
+        srcImpl.checkAccess(srcFromOffset, srcBytes, true);
+        dstImpl.checkAccess(dstFromOffset, dstBytes, true);
+
+        long bytes = Math.min(srcBytes, dstBytes);
+        long i = 0;
+        if (bytes > 7) {
+            if (srcImpl.get(JAVA_BYTE, srcFromOffset) != dstImpl.get(JAVA_BYTE, dstFromOffset)) {
+                return 0;
+            }
+            i = AbstractMemorySegmentImpl.vectorizedMismatchLargeForBytes(srcImpl.sessionImpl(), dstImpl.sessionImpl(),
+                    srcImpl.unsafeGetBase(), srcImpl.unsafeGetOffset() + srcFromOffset,
+                    dstImpl.unsafeGetBase(), dstImpl.unsafeGetOffset() + dstFromOffset,
+                    bytes);
+            if (i >= 0) {
+                return i;
+            }
+            long remaining = ~i;
+            assert remaining < 8 : "remaining greater than 7: " + remaining;
+            i = bytes - remaining;
+        }
+        for (; i < bytes; i++) {
+            if (srcImpl.get(JAVA_BYTE, srcFromOffset + i) != dstImpl.get(JAVA_BYTE, dstFromOffset + i)) {
+                return i;
+            }
+        }
+        return srcBytes != dstBytes ? bytes : -1;
+    }
+
+    private static int getScaleFactor(Buffer buffer) {
+        return switch (buffer) {
+            case ByteBuffer   _                 -> 0;
+            case CharBuffer   _, ShortBuffer  _ -> 1;
+            case IntBuffer    _, FloatBuffer  _ -> 2;
+            case LongBuffer   _, DoubleBuffer _ -> 3;
+        };
+    }
+
+    // accessors
+
+    @ForceInline
+    @Override
+    public byte get(ValueLayout.OfByte layout, long offset) {
+        return (byte) layout.varHandle().get((MemorySegment)this, offset);
+    }
+
+    @ForceInline
+    @Override
+    public void set(ValueLayout.OfByte layout, long offset, byte value) {
+        layout.varHandle().set((MemorySegment)this, offset, value);
+    }
+
+    @ForceInline
+    @Override
+    public boolean get(ValueLayout.OfBoolean layout, long offset) {
+        return (boolean) layout.varHandle().get((MemorySegment)this, offset);
+    }
+
+    @ForceInline
+    @Override
+    public void set(ValueLayout.OfBoolean layout, long offset, boolean value) {
+        layout.varHandle().set((MemorySegment)this, offset, value);
+    }
+
+    @ForceInline
+    @Override
+    public char get(ValueLayout.OfChar layout, long offset) {
+        return (char) layout.varHandle().get((MemorySegment)this, offset);
+    }
+
+    @ForceInline
+    @Override
+    public void set(ValueLayout.OfChar layout, long offset, char value) {
+        layout.varHandle().set((MemorySegment)this, offset, value);
+    }
+
+    @ForceInline
+    @Override
+    public short get(ValueLayout.OfShort layout, long offset) {
+        return (short) layout.varHandle().get((MemorySegment)this, offset);
+    }
+
+    @ForceInline
+    @Override
+    public void set(ValueLayout.OfShort layout, long offset, short value) {
+        layout.varHandle().set((MemorySegment)this, offset, value);
+    }
+
+    @ForceInline
+    @Override
+    public int get(ValueLayout.OfInt layout, long offset) {
+        return (int) layout.varHandle().get((MemorySegment)this, offset);
+    }
+
+    @ForceInline
+    @Override
+    public void set(ValueLayout.OfInt layout, long offset, int value) {
+        layout.varHandle().set((MemorySegment)this, offset, value);
+    }
+
+    @ForceInline
+    @Override
+    public float get(ValueLayout.OfFloat layout, long offset) {
+        return (float) layout.varHandle().get((MemorySegment)this, offset);
+    }
+
+    @ForceInline
+    @Override
+    public void set(ValueLayout.OfFloat layout, long offset, float value) {
+        layout.varHandle().set((MemorySegment)this, offset, value);
+    }
+
+    @ForceInline
+    @Override
+    public long get(ValueLayout.OfLong layout, long offset) {
+        return (long) layout.varHandle().get((MemorySegment)this, offset);
+    }
+
+    @ForceInline
+    @Override
+    public void set(ValueLayout.OfLong layout, long offset, long value) {
+        layout.varHandle().set((MemorySegment)this, offset, value);
+    }
+
+    @ForceInline
+    @Override
+    public double get(ValueLayout.OfDouble layout, long offset) {
+        return (double) layout.varHandle().get((MemorySegment)this, offset);
+    }
+
+    @ForceInline
+    @Override
+    public void set(ValueLayout.OfDouble layout, long offset, double value) {
+        layout.varHandle().set((MemorySegment)this, offset, value);
+    }
+
+    @ForceInline
+    @Override
+    public MemorySegment get(AddressLayout layout, long offset) {
+        return (MemorySegment) layout.varHandle().get((MemorySegment)this, offset);
+    }
+
+    @ForceInline
+    @Override
+    public void set(AddressLayout layout, long offset, MemorySegment value) {
+        Objects.requireNonNull(value);
+        layout.varHandle().set((MemorySegment)this, offset, value);
+    }
+
+    @ForceInline
+    @Override
+    public byte getAtIndex(ValueLayout.OfByte layout, long index) {
+        Utils.checkElementAlignment(layout, "Layout alignment greater than its size");
+        return (byte) layout.varHandle().get((MemorySegment)this, index * layout.byteSize());
+    }
+
+    @ForceInline
+    @Override
+    public boolean getAtIndex(ValueLayout.OfBoolean layout, long index) {
+        Utils.checkElementAlignment(layout, "Layout alignment greater than its size");
+        return (boolean) layout.varHandle().get((MemorySegment)this, index * layout.byteSize());
+    }
+
+    @ForceInline
+    @Override
+    public char getAtIndex(ValueLayout.OfChar layout, long index) {
+        Utils.checkElementAlignment(layout, "Layout alignment greater than its size");
+        return (char) layout.varHandle().get((MemorySegment)this, index * layout.byteSize());
+    }
+
+    @ForceInline
+    @Override
+    public void setAtIndex(ValueLayout.OfChar layout, long index, char value) {
+        Utils.checkElementAlignment(layout, "Layout alignment greater than its size");
+        layout.varHandle().set((MemorySegment)this, index * layout.byteSize(), value);
+    }
+
+    @ForceInline
+    @Override
+    public short getAtIndex(ValueLayout.OfShort layout, long index) {
+        Utils.checkElementAlignment(layout, "Layout alignment greater than its size");
+        return (short) layout.varHandle().get((MemorySegment)this, index * layout.byteSize());
+    }
+
+    @ForceInline
+    @Override
+    public void setAtIndex(ValueLayout.OfByte layout, long index, byte value) {
+        Utils.checkElementAlignment(layout, "Layout alignment greater than its size");
+        layout.varHandle().set((MemorySegment)this, index * layout.byteSize(), value);
+    }
+
+    @ForceInline
+    @Override
+    public void setAtIndex(ValueLayout.OfBoolean layout, long index, boolean value) {
+        Utils.checkElementAlignment(layout, "Layout alignment greater than its size");
+        layout.varHandle().set((MemorySegment)this, index * layout.byteSize(), value);
+    }
+
+    @ForceInline
+    @Override
+    public void setAtIndex(ValueLayout.OfShort layout, long index, short value) {
+        Utils.checkElementAlignment(layout, "Layout alignment greater than its size");
+        layout.varHandle().set((MemorySegment)this, index * layout.byteSize(), value);
+    }
+
+    @ForceInline
+    @Override
+    public int getAtIndex(ValueLayout.OfInt layout, long index) {
+        Utils.checkElementAlignment(layout, "Layout alignment greater than its size");
+        return (int) layout.varHandle().get((MemorySegment)this, index * layout.byteSize());
+    }
+
+    @ForceInline
+    @Override
+    public void setAtIndex(ValueLayout.OfInt layout, long index, int value) {
+        Utils.checkElementAlignment(layout, "Layout alignment greater than its size");
+        layout.varHandle().set((MemorySegment)this, index * layout.byteSize(), value);
+    }
+
+    @ForceInline
+    @Override
+    public float getAtIndex(ValueLayout.OfFloat layout, long index) {
+        Utils.checkElementAlignment(layout, "Layout alignment greater than its size");
+        return (float) layout.varHandle().get((MemorySegment)this, index * layout.byteSize());
+    }
+
+    @ForceInline
+    @Override
+    public void setAtIndex(ValueLayout.OfFloat layout, long index, float value) {
+        Utils.checkElementAlignment(layout, "Layout alignment greater than its size");
+        layout.varHandle().set((MemorySegment)this, index * layout.byteSize(), value);
+    }
+
+    @ForceInline
+    @Override
+    public long getAtIndex(ValueLayout.OfLong layout, long index) {
+        Utils.checkElementAlignment(layout, "Layout alignment greater than its size");
+        return (long) layout.varHandle().get((MemorySegment)this, index * layout.byteSize());
+    }
+
+    @ForceInline
+    @Override
+    public void setAtIndex(ValueLayout.OfLong layout, long index, long value) {
+        Utils.checkElementAlignment(layout, "Layout alignment greater than its size");
+        layout.varHandle().set((MemorySegment)this, index * layout.byteSize(), value);
+    }
+
+    @ForceInline
+    @Override
+    public double getAtIndex(ValueLayout.OfDouble layout, long index) {
+        Utils.checkElementAlignment(layout, "Layout alignment greater than its size");
+        return (double) layout.varHandle().get((MemorySegment)this, index * layout.byteSize());
+    }
+
+    @ForceInline
+    @Override
+    public void setAtIndex(ValueLayout.OfDouble layout, long index, double value) {
+        Utils.checkElementAlignment(layout, "Layout alignment greater than its size");
+        layout.varHandle().set((MemorySegment)this, index * layout.byteSize(), value);
+    }
+
+    @ForceInline
+    @Override
+    public MemorySegment getAtIndex(AddressLayout layout, long index) {
+        Utils.checkElementAlignment(layout, "Layout alignment greater than its size");
+        return (MemorySegment) layout.varHandle().get((MemorySegment)this, index * layout.byteSize());
+    }
+
+    @ForceInline
+    @Override
+    public void setAtIndex(AddressLayout layout, long index, MemorySegment value) {
+        Objects.requireNonNull(value);
+        Utils.checkElementAlignment(layout, "Layout alignment greater than its size");
+        layout.varHandle().set((MemorySegment)this, index * layout.byteSize(), value);
+    }
+
+    @Override
+    public String getString(long offset) {
+        return getString(offset, sun.nio.cs.UTF_8.INSTANCE);
+    }
+
+    @Override
+    public String getString(long offset, Charset charset) {
+        Objects.requireNonNull(charset);
+        return StringSupport.read(this, offset, charset);
+    }
+
+    @Override
+    public void setString(long offset, String str) {
+        Objects.requireNonNull(str);
+        setString(offset, str, sun.nio.cs.UTF_8.INSTANCE);
+    }
+
+    @Override
+    public void setString(long offset, String str, Charset charset) {
+        Objects.requireNonNull(charset);
+        Objects.requireNonNull(str);
+        StringSupport.write(this, offset, charset, str);
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/foreign/ArenaImpl.class b/tests/test_data/std/jdk/internal/foreign/ArenaImpl.class
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diff --git a/tests/test_data/std/jdk/internal/foreign/ArenaImpl.java b/tests/test_data/std/jdk/internal/foreign/ArenaImpl.java
new file mode 100644
index 00000000..027aed5f
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/foreign/ArenaImpl.java
@@ -0,0 +1,63 @@
+/*
+ * Copyright (c) 2023, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package jdk.internal.foreign;
+
+import java.lang.foreign.Arena;
+import java.lang.foreign.MemoryLayout;
+import java.lang.foreign.MemorySegment;
+import java.lang.foreign.MemorySegment.Scope;
+import java.util.Objects;
+
+public final class ArenaImpl implements Arena {
+
+    private final MemorySessionImpl session;
+    private final boolean shouldReserveMemory;
+    ArenaImpl(MemorySessionImpl session) {
+        this.session = session;
+        shouldReserveMemory = session instanceof ImplicitSession;
+    }
+
+    @Override
+    public Scope scope() {
+        return session;
+    }
+
+    @Override
+    public void close() {
+        session.close();
+    }
+
+    public MemorySegment allocateNoInit(long byteSize, long byteAlignment) {
+        Utils.checkAllocationSizeAndAlign(byteSize, byteAlignment);
+        return SegmentFactories.allocateSegment(byteSize, byteAlignment, session, shouldReserveMemory);
+    }
+
+    @Override
+    public MemorySegment allocate(long byteSize, long byteAlignment) {
+        MemorySegment segment = allocateNoInit(byteSize, byteAlignment);
+        return segment.fill((byte)0);
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/foreign/CABI.class b/tests/test_data/std/jdk/internal/foreign/CABI.class
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HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/foreign/CABI.java b/tests/test_data/std/jdk/internal/foreign/CABI.java
new file mode 100644
index 00000000..500e312b
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/foreign/CABI.java
@@ -0,0 +1,108 @@
+/*
+ *  Copyright (c) 2020, 2023, Oracle and/or its affiliates. All rights reserved.
+ *  DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ *  This code is free software; you can redistribute it and/or modify it
+ *  under the terms of the GNU General Public License version 2 only, as
+ *  published by the Free Software Foundation.  Oracle designates this
+ *  particular file as subject to the "Classpath" exception as provided
+ *  by Oracle in the LICENSE file that accompanied this code.
+ *
+ *  This code is distributed in the hope that it will be useful, but WITHOUT
+ *  ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ *  FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ *  version 2 for more details (a copy is included in the LICENSE file that
+ *  accompanied this code).
+ *
+ *  You should have received a copy of the GNU General Public License version
+ *  2 along with this work; if not, write to the Free Software Foundation,
+ *  Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ *   Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ *  or visit www.oracle.com if you need additional information or have any
+ *  questions.
+ *
+ */
+package jdk.internal.foreign;
+
+import jdk.internal.foreign.abi.fallback.FallbackLinker;
+import jdk.internal.vm.ForeignLinkerSupport;
+import jdk.internal.util.OperatingSystem;
+import jdk.internal.util.StaticProperty;
+
+import static java.lang.foreign.ValueLayout.ADDRESS;
+import static sun.security.action.GetPropertyAction.privilegedGetProperty;
+
+public enum CABI {
+    SYS_V,
+    WIN_64,
+    LINUX_AARCH_64,
+    MAC_OS_AARCH_64,
+    WIN_AARCH_64,
+    AIX_PPC_64,
+    LINUX_PPC_64,
+    LINUX_PPC_64_LE,
+    LINUX_RISCV_64,
+    LINUX_S390,
+    FALLBACK,
+    UNSUPPORTED;
+
+    private static final CABI CURRENT = computeCurrent();
+
+    private static CABI computeCurrent() {
+        String abi = privilegedGetProperty("jdk.internal.foreign.CABI");
+        if (abi != null) {
+            return CABI.valueOf(abi);
+        }
+
+        if (ForeignLinkerSupport.isSupported()) {
+            // figure out the ABI based on the platform
+            String arch = StaticProperty.osArch();
+            long addressSize = ADDRESS.byteSize();
+            // might be running in a 32-bit VM on a 64-bit platform.
+            // addressSize will be correctly 32
+            if ((arch.equals("amd64") || arch.equals("x86_64")) && addressSize == 8) {
+                if (OperatingSystem.isWindows()) {
+                    return WIN_64;
+                } else {
+                    return SYS_V;
+                }
+            } else if (arch.equals("aarch64")) {
+                if (OperatingSystem.isMacOS()) {
+                    return MAC_OS_AARCH_64;
+                } else if (OperatingSystem.isWindows()) {
+                    return WIN_AARCH_64;
+                } else {
+                    // The Linux ABI follows the standard AAPCS ABI
+                    return LINUX_AARCH_64;
+                }
+            } else if (arch.equals("ppc64")) {
+                if (OperatingSystem.isLinux()) {
+                    return LINUX_PPC_64;
+                } else if (OperatingSystem.isAix()) {
+                    return AIX_PPC_64;
+                }
+            } else if (arch.equals("ppc64le")) {
+                if (OperatingSystem.isLinux()) {
+                    return LINUX_PPC_64_LE;
+                }
+            } else if (arch.equals("riscv64")) {
+                if (OperatingSystem.isLinux()) {
+                    return LINUX_RISCV_64;
+                }
+            } else if (arch.equals("s390x")) {
+                if (OperatingSystem.isLinux()) {
+                    return LINUX_S390;
+                }
+        }
+        } else if (FallbackLinker.isSupported()) {
+            return FALLBACK; // fallback linker
+        }
+
+        return UNSUPPORTED;
+    }
+
+    public static CABI current() {
+        return CURRENT;
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/foreign/ConfinedSession$ConfinedResourceList.class b/tests/test_data/std/jdk/internal/foreign/ConfinedSession$ConfinedResourceList.class
new file mode 100644
index 0000000000000000000000000000000000000000..403996a6b9397685ac6d17b6dd9d91f8a1baa6a0
GIT binary patch
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/foreign/ConfinedSession.class b/tests/test_data/std/jdk/internal/foreign/ConfinedSession.class
new file mode 100644
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/foreign/ConfinedSession.java b/tests/test_data/std/jdk/internal/foreign/ConfinedSession.java
new file mode 100644
index 00000000..4ff0df78
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/foreign/ConfinedSession.java
@@ -0,0 +1,117 @@
+/*
+ * Copyright (c) 2021, 2022, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package jdk.internal.foreign;
+
+import java.lang.invoke.MethodHandles;
+import java.lang.invoke.VarHandle;
+
+import jdk.internal.vm.annotation.ForceInline;
+
+/**
+ * A confined session, which features an owner thread. The liveness check features an additional
+ * confinement check - that is, calling any operation on this session from a thread other than the
+ * owner thread will result in an exception. Because of this restriction, checking the liveness bit
+ * can be performed in plain mode.
+ */
+final class ConfinedSession extends MemorySessionImpl {
+
+    private int asyncReleaseCount = 0;
+
+    static final VarHandle ASYNC_RELEASE_COUNT;
+
+    static {
+        try {
+            ASYNC_RELEASE_COUNT = MethodHandles.lookup().findVarHandle(ConfinedSession.class, "asyncReleaseCount", int.class);
+        } catch (Throwable ex) {
+            throw new ExceptionInInitializerError(ex);
+        }
+    }
+
+    public ConfinedSession(Thread owner) {
+        super(owner, new ConfinedResourceList());
+    }
+
+    @Override
+    @ForceInline
+    public void acquire0() {
+        checkValidState();
+        if (state == MAX_FORKS) {
+            throw tooManyAcquires();
+        }
+        state++;
+    }
+
+    @Override
+    @ForceInline
+    public void release0() {
+        if (Thread.currentThread() == owner) {
+            state--;
+        } else {
+            // It is possible to end up here in two cases: this session was kept alive by some other confined session
+            // which is implicitly released (in which case the release call comes from the cleaner thread). Or,
+            // this session might be kept alive by a shared session, which means the release call can come from any
+            // thread.
+            ASYNC_RELEASE_COUNT.getAndAdd(this, 1);
+        }
+    }
+
+    void justClose() {
+        checkValidState();
+        int asyncCount = (int)ASYNC_RELEASE_COUNT.getVolatile(this);
+        if ((state == 0 && asyncCount == 0)
+                || ((state - asyncCount) == 0)) {
+            state = CLOSED;
+        } else {
+            throw alreadyAcquired(state - asyncCount);
+        }
+    }
+
+    /**
+     * A confined resource list; no races are possible here.
+     */
+    static final class ConfinedResourceList extends ResourceList {
+        @Override
+        void add(ResourceCleanup cleanup) {
+            if (fst != ResourceCleanup.CLOSED_LIST) {
+                cleanup.next = fst;
+                fst = cleanup;
+            } else {
+                throw alreadyClosed();
+            }
+        }
+
+        @Override
+        void cleanup() {
+            if (fst != ResourceCleanup.CLOSED_LIST) {
+                ResourceCleanup prev = fst;
+                fst = ResourceCleanup.CLOSED_LIST;
+                cleanup(prev);
+            } else {
+                throw alreadyClosed();
+            }
+        }
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/foreign/FunctionDescriptorImpl.class b/tests/test_data/std/jdk/internal/foreign/FunctionDescriptorImpl.class
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diff --git a/tests/test_data/std/jdk/internal/foreign/FunctionDescriptorImpl.java b/tests/test_data/std/jdk/internal/foreign/FunctionDescriptorImpl.java
new file mode 100644
index 00000000..da172728
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/foreign/FunctionDescriptorImpl.java
@@ -0,0 +1,196 @@
+/*
+ *  Copyright (c) 2020, 2022, Oracle and/or its affiliates. All rights reserved.
+ *  DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ *  This code is free software; you can redistribute it and/or modify it
+ *  under the terms of the GNU General Public License version 2 only, as
+ *  published by the Free Software Foundation.  Oracle designates this
+ *  particular file as subject to the "Classpath" exception as provided
+ *  by Oracle in the LICENSE file that accompanied this code.
+ *
+ *  This code is distributed in the hope that it will be useful, but WITHOUT
+ *  ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ *  FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ *  version 2 for more details (a copy is included in the LICENSE file that
+ *  accompanied this code).
+ *
+ *  You should have received a copy of the GNU General Public License version
+ *  2 along with this work; if not, write to the Free Software Foundation,
+ *  Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ *  Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ *  or visit www.oracle.com if you need additional information or have any
+ *  questions.
+ */
+package jdk.internal.foreign;
+
+import java.lang.foreign.FunctionDescriptor;
+import java.lang.foreign.GroupLayout;
+import java.lang.foreign.MemoryLayout;
+import java.lang.foreign.MemorySegment;
+import java.lang.foreign.PaddingLayout;
+import java.lang.foreign.SequenceLayout;
+import java.lang.foreign.ValueLayout;
+import java.lang.invoke.MethodType;
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Objects;
+import java.util.Optional;
+import java.util.stream.Collectors;
+
+import static java.util.Objects.requireNonNull;
+
+/**
+ * @implSpec This class and its subclasses are immutable, thread-safe and <a href="{@docRoot}/java.base/java/lang/doc-files/ValueBased.html">value-based</a>.
+ */
+public final class FunctionDescriptorImpl implements FunctionDescriptor {
+
+    private final MemoryLayout resLayout; // Nullable
+    private final List<MemoryLayout> argLayouts;
+
+    private FunctionDescriptorImpl(MemoryLayout resLayout, List<MemoryLayout> argLayouts) {
+        if (resLayout instanceof PaddingLayout) {
+            throw new IllegalArgumentException("Unsupported padding layout return in function descriptor: " + resLayout);
+        }
+        Optional<MemoryLayout> paddingLayout = argLayouts.stream().filter(l -> l instanceof PaddingLayout).findAny();
+        if (paddingLayout.isPresent()) {
+            throw new IllegalArgumentException("Unsupported padding layout argument in function descriptor: " + paddingLayout.get());
+        }
+        this.resLayout = resLayout;
+        this.argLayouts = List.copyOf(argLayouts);
+    }
+
+    /**
+     * {@return the return layout (if any) associated with this function descriptor}
+     */
+    public Optional<MemoryLayout> returnLayout() {
+        return Optional.ofNullable(resLayout);
+    }
+
+    /**
+     * {@return the argument layouts associated with this function descriptor (as an immutable list)}.
+     */
+    public List<MemoryLayout> argumentLayouts() {
+        return argLayouts;
+    }
+
+    /**
+     * Returns a function descriptor with the given argument layouts appended to the argument layout array
+     * of this function descriptor.
+     *
+     * @param addedLayouts the argument layouts to append.
+     * @return the new function descriptor.
+     */
+    public FunctionDescriptorImpl appendArgumentLayouts(MemoryLayout... addedLayouts) {
+        return insertArgumentLayouts(argLayouts.size(), addedLayouts);
+    }
+
+    /**
+     * Returns a function descriptor with the given argument layouts inserted at the given index, into the argument
+     * layout array of this function descriptor.
+     *
+     * @param index        the index at which to insert the arguments
+     * @param addedLayouts the argument layouts to insert at given index.
+     * @return the new function descriptor.
+     * @throws IllegalArgumentException if {@code index < 0 || index > argumentLayouts().size()}.
+     */
+    public FunctionDescriptorImpl insertArgumentLayouts(int index, MemoryLayout... addedLayouts) {
+        if (index < 0 || index > argLayouts.size())
+            throw new IllegalArgumentException("Index out of bounds: " + index);
+        List<MemoryLayout> added = List.of(addedLayouts); // null check on array and its elements
+        List<MemoryLayout> newLayouts = new ArrayList<>(argLayouts.size() + addedLayouts.length);
+        newLayouts.addAll(argLayouts.subList(0, index));
+        newLayouts.addAll(added);
+        newLayouts.addAll(argLayouts.subList(index, argLayouts.size()));
+        return new FunctionDescriptorImpl(resLayout, newLayouts);
+    }
+
+    /**
+     * Returns a function descriptor with the given memory layout as the new return layout.
+     *
+     * @param newReturn the new return layout.
+     * @return the new function descriptor.
+     */
+    public FunctionDescriptorImpl changeReturnLayout(MemoryLayout newReturn) {
+        requireNonNull(newReturn);
+        return new FunctionDescriptorImpl(newReturn, argLayouts);
+    }
+
+    /**
+     * Returns a function descriptor with the return layout dropped. This is useful to model functions
+     * which return no values.
+     *
+     * @return the new function descriptor.
+     */
+    public FunctionDescriptorImpl dropReturnLayout() {
+        return new FunctionDescriptorImpl(null, argLayouts);
+    }
+
+    private static Class<?> carrierTypeFor(MemoryLayout layout) {
+        if (layout instanceof ValueLayout valueLayout) {
+            return valueLayout.carrier();
+        } else if (layout instanceof GroupLayout || layout instanceof SequenceLayout) {
+            return MemorySegment.class;
+        } else {
+            // Note: we should not worry about padding layouts, as they cannot be present in a function descriptor
+            throw new AssertionError("Cannot get here");
+        }
+    }
+
+    @Override
+    public MethodType toMethodType() {
+        Class<?> returnValue = resLayout != null ? carrierTypeFor(resLayout) : void.class;
+        Class<?>[] argCarriers = new Class<?>[argLayouts.size()];
+        for (int i = 0; i < argCarriers.length; i++) {
+            argCarriers[i] = carrierTypeFor(argLayouts.get(i));
+        }
+        return MethodType.methodType(returnValue, argCarriers);
+    }
+
+    /**
+     * {@return the string representation of this function descriptor}
+     */
+    @Override
+    public String toString() {
+        return String.format("(%s)%s",
+                argLayouts.stream().map(Object::toString)
+                        .collect(Collectors.joining()),
+                returnLayout()
+                        .map(Object::toString)
+                        .orElse("v"));
+    }
+
+    /**
+     * Compares the specified object with this function descriptor for equality. Returns {@code true} if and only if the specified
+     * object is also a function descriptor, and all the following conditions are met:
+     * <ul>
+     *     <li>the two function descriptors have equals return layouts (see {@link MemoryLayout#equals(Object)}), or both have no return layout;</li>
+     *     <li>the two function descriptors have argument layouts that are pair-wise {@linkplain MemoryLayout#equals(Object) equal}; and</li>
+     * </ul>
+     *
+     * @param other the object to be compared for equality with this function descriptor.
+     * @return {@code true} if the specified object is equal to this function descriptor.
+     */
+    @Override
+    public boolean equals(Object other) {
+        return other instanceof FunctionDescriptorImpl f &&
+                Objects.equals(resLayout, f.resLayout) &&
+                Objects.equals(argLayouts, f.argLayouts);
+    }
+
+    /**
+     * {@return the hash code value for this function descriptor}
+     */
+    @Override
+    public int hashCode() {
+        return Objects.hash(argLayouts, resLayout);
+    }
+
+    public static FunctionDescriptor of(MemoryLayout resLayout, List<MemoryLayout> argLayouts) {
+        return new FunctionDescriptorImpl(resLayout, argLayouts);
+    }
+
+    public static FunctionDescriptor ofVoid(List<MemoryLayout> argLayouts) {
+        return new FunctionDescriptorImpl(null, argLayouts);
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/foreign/GlobalSession$HeapSession.class b/tests/test_data/std/jdk/internal/foreign/GlobalSession$HeapSession.class
new file mode 100644
index 0000000000000000000000000000000000000000..2f79f1fb0d1f3dbc23631f3dc5899cacdfc38012
GIT binary patch
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diff --git a/tests/test_data/std/jdk/internal/foreign/GlobalSession.class b/tests/test_data/std/jdk/internal/foreign/GlobalSession.class
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HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/foreign/GlobalSession.java b/tests/test_data/std/jdk/internal/foreign/GlobalSession.java
new file mode 100644
index 00000000..c075778b
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/foreign/GlobalSession.java
@@ -0,0 +1,101 @@
+/*
+ * Copyright (c) 2022, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package jdk.internal.foreign;
+
+import jdk.internal.access.JavaNioAccess;
+import jdk.internal.access.SharedSecrets;
+import jdk.internal.vm.annotation.ForceInline;
+import sun.nio.ch.DirectBuffer;
+
+import java.nio.Buffer;
+import java.util.Objects;
+
+/**
+ * The global, non-closeable, shared session. Similar to a shared session, but its {@link #close()} method throws unconditionally.
+ * Adding new resources to the global session, does nothing: as the session can never become not-alive, there is nothing to track.
+ * Acquiring and or releasing a memory session similarly does nothing.
+ */
+non-sealed class GlobalSession extends MemorySessionImpl {
+
+    public GlobalSession() {
+        super(null, null);
+    }
+
+    @Override
+    @ForceInline
+    public void release0() {
+        // do nothing
+    }
+
+    @Override
+    public boolean isCloseable() {
+        return false;
+    }
+
+    @Override
+    @ForceInline
+    public void acquire0() {
+        // do nothing
+    }
+
+    @Override
+    void addInternal(ResourceList.ResourceCleanup resource) {
+        // do nothing
+    }
+
+    @Override
+    public void justClose() {
+        throw nonCloseable();
+    }
+
+    /**
+     * This is a global session that wraps a heap object. Possible objects are: Java arrays, buffers and
+     * class loaders. Objects of two heap sessions are compared by identity. That is, if the wrapped object is the same,
+     * then the resulting heap sessions are also considered equals. We do not compare the objects using
+     * {@link Object#equals(Object)}, as that would be problematic when comparing buffers, whose equality and
+     * hash codes are content-dependent.
+     */
+    static class HeapSession extends GlobalSession {
+
+        final Object ref;
+
+        public HeapSession(Object ref) {
+            super();
+            this.ref = Objects.requireNonNull(ref);
+        }
+
+        @Override
+        public boolean equals(Object obj) {
+            return obj instanceof HeapSession session &&
+                    ref == session.ref;
+        }
+
+        @Override
+        public int hashCode() {
+            return System.identityHashCode(ref);
+        }
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/foreign/HeapMemorySegmentImpl$OfByte.class b/tests/test_data/std/jdk/internal/foreign/HeapMemorySegmentImpl$OfByte.class
new file mode 100644
index 0000000000000000000000000000000000000000..c8102a43686d4b23e6dfd5258a32183393405e37
GIT binary patch
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diff --git a/tests/test_data/std/jdk/internal/foreign/HeapMemorySegmentImpl$OfChar.class b/tests/test_data/std/jdk/internal/foreign/HeapMemorySegmentImpl$OfChar.class
new file mode 100644
index 0000000000000000000000000000000000000000..dba4dc09880300e07ae1bfc4285393852fb43d2a
GIT binary patch
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/foreign/HeapMemorySegmentImpl$OfDouble.class b/tests/test_data/std/jdk/internal/foreign/HeapMemorySegmentImpl$OfDouble.class
new file mode 100644
index 0000000000000000000000000000000000000000..658ade3f4b95f0fe1f603d2c40db964dad7e72cc
GIT binary patch
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/foreign/HeapMemorySegmentImpl$OfFloat.class b/tests/test_data/std/jdk/internal/foreign/HeapMemorySegmentImpl$OfFloat.class
new file mode 100644
index 0000000000000000000000000000000000000000..89d692697ba6b8d1b3e5446c128eee0b27f90c55
GIT binary patch
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/foreign/HeapMemorySegmentImpl$OfInt.class b/tests/test_data/std/jdk/internal/foreign/HeapMemorySegmentImpl$OfInt.class
new file mode 100644
index 0000000000000000000000000000000000000000..5d903bebfb2cf906298c14d97d94b56c5ec29b0a
GIT binary patch
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/foreign/HeapMemorySegmentImpl$OfLong.class b/tests/test_data/std/jdk/internal/foreign/HeapMemorySegmentImpl$OfLong.class
new file mode 100644
index 0000000000000000000000000000000000000000..dce756300fd575802d1e2b7c9a89ce78c10cc357
GIT binary patch
literal 2180
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/foreign/HeapMemorySegmentImpl$OfShort.class b/tests/test_data/std/jdk/internal/foreign/HeapMemorySegmentImpl$OfShort.class
new file mode 100644
index 0000000000000000000000000000000000000000..aa17610ec95b63058e99bc908ff4adbd053dac50
GIT binary patch
literal 2186
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/foreign/HeapMemorySegmentImpl.class b/tests/test_data/std/jdk/internal/foreign/HeapMemorySegmentImpl.class
new file mode 100644
index 0000000000000000000000000000000000000000..caa3ba946a92aff8f2c4f29503e9fe44e5ff9327
GIT binary patch
literal 4060
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HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/foreign/HeapMemorySegmentImpl.java b/tests/test_data/std/jdk/internal/foreign/HeapMemorySegmentImpl.java
new file mode 100644
index 00000000..2512b9e5
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/foreign/HeapMemorySegmentImpl.java
@@ -0,0 +1,290 @@
+/*
+ *  Copyright (c) 2020, 2024, Oracle and/or its affiliates. All rights reserved.
+ *  DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ *  This code is free software; you can redistribute it and/or modify it
+ *  under the terms of the GNU General Public License version 2 only, as
+ *  published by the Free Software Foundation.  Oracle designates this
+ *  particular file as subject to the "Classpath" exception as provided
+ *  by Oracle in the LICENSE file that accompanied this code.
+ *
+ *  This code is distributed in the hope that it will be useful, but WITHOUT
+ *  ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ *  FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ *  version 2 for more details (a copy is included in the LICENSE file that
+ *  accompanied this code).
+ *
+ *  You should have received a copy of the GNU General Public License version
+ *  2 along with this work; if not, write to the Free Software Foundation,
+ *  Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ *   Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ *  or visit www.oracle.com if you need additional information or have any
+ *  questions.
+ *
+ */
+
+package jdk.internal.foreign;
+
+import java.lang.foreign.ValueLayout;
+import java.nio.ByteBuffer;
+import java.util.Objects;
+import java.util.Optional;
+
+import jdk.internal.access.JavaNioAccess;
+import jdk.internal.access.SharedSecrets;
+import jdk.internal.vm.annotation.ForceInline;
+
+/**
+ * Implementation for heap memory segments. A heap memory segment is composed by an offset and
+ * a base object (typically an array). To enhance performances, the access to the base object needs to feature
+ * sharp type information, as well as sharp null-check information. For this reason, many concrete subclasses
+ * of {@link HeapMemorySegmentImpl} are defined (e.g. {@link OfFloat}), so that each subclass can override the
+ * {@link HeapMemorySegmentImpl#unsafeGetBase()} method so that it returns an array of the correct (sharp) type. Note that
+ * the field type storing the 'base' coordinate is just Object; similarly, all the constructor in the subclasses
+ * accept an Object 'base' parameter instead of a sharper type (e.g. {@code byte[]}). This is deliberate, as
+ * using sharper types would require use of type-conversions, which in turn would inhibit some C2 optimizations,
+ * such as the elimination of store barriers in methods like {@link HeapMemorySegmentImpl#dup(long, long, boolean, MemorySessionImpl)}.
+ */
+abstract sealed class HeapMemorySegmentImpl extends AbstractMemorySegmentImpl {
+
+    // Constants defining the maximum alignment supported by various kinds of heap arrays.
+
+    private static final long MAX_ALIGN_BYTE_ARRAY = ValueLayout.JAVA_BYTE.byteAlignment();
+    private static final long MAX_ALIGN_SHORT_ARRAY = ValueLayout.JAVA_SHORT.byteAlignment();
+    private static final long MAX_ALIGN_INT_ARRAY = ValueLayout.JAVA_INT.byteAlignment();
+    private static final long MAX_ALIGN_LONG_ARRAY = ValueLayout.JAVA_LONG.byteAlignment();
+
+    final long offset;
+    final Object base;
+
+    @Override
+    public Optional<Object> heapBase() {
+        return readOnly ?
+                Optional.empty() :
+                Optional.of(base);
+    }
+
+    @ForceInline
+    HeapMemorySegmentImpl(long offset, Object base, long length, boolean readOnly, MemorySessionImpl session) {
+        super(length, readOnly, session);
+        this.offset = offset;
+        this.base = base;
+    }
+
+    @Override
+    public long unsafeGetOffset() {
+        return offset;
+    }
+
+    @Override
+    public final long maxByteAlignment() {
+        return address() == 0
+            ? maxAlignMask()
+            : Math.min(maxAlignMask(), Long.lowestOneBit(address()));
+    }
+
+    @Override
+    abstract HeapMemorySegmentImpl dup(long offset, long size, boolean readOnly, MemorySessionImpl scope);
+
+    @Override
+    ByteBuffer makeByteBuffer() {
+        if (!(base instanceof byte[] baseByte)) {
+            throw new UnsupportedOperationException("Not an address to an heap-allocated byte array");
+        }
+        JavaNioAccess nioAccess = SharedSecrets.getJavaNioAccess();
+        return nioAccess.newHeapByteBuffer(baseByte, (int)offset - Utils.BaseAndScale.BYTE.base(), (int) byteSize(), null);
+    }
+
+    // factories
+
+    public static final class OfByte extends HeapMemorySegmentImpl {
+
+        OfByte(long offset, Object base, long length, boolean readOnly, MemorySessionImpl session) {
+            super(offset, base, length, readOnly, session);
+        }
+
+        @Override
+        OfByte dup(long offset, long size, boolean readOnly, MemorySessionImpl scope) {
+            return new OfByte(this.offset + offset, base, size, readOnly, scope);
+        }
+
+        @Override
+        public byte[] unsafeGetBase() {
+            return (byte[])Objects.requireNonNull(base);
+        }
+
+        @Override
+        public long maxAlignMask() {
+            return MAX_ALIGN_BYTE_ARRAY;
+        }
+
+        @Override
+        public long address() {
+            return offset - Utils.BaseAndScale.BYTE.base();
+        }
+    }
+
+    public static final class OfChar extends HeapMemorySegmentImpl {
+
+        OfChar(long offset, Object base, long length, boolean readOnly, MemorySessionImpl session) {
+            super(offset, base, length, readOnly, session);
+        }
+
+        @Override
+        OfChar dup(long offset, long size, boolean readOnly, MemorySessionImpl scope) {
+            return new OfChar(this.offset + offset, base, size, readOnly, scope);
+        }
+
+        @Override
+        public char[] unsafeGetBase() {
+            return (char[])Objects.requireNonNull(base);
+        }
+
+        @Override
+        public long maxAlignMask() {
+            return MAX_ALIGN_SHORT_ARRAY;
+        }
+
+        @Override
+        public long address() {
+            return offset - Utils.BaseAndScale.CHAR.base();
+        }
+    }
+
+    public static final class OfShort extends HeapMemorySegmentImpl {
+
+        OfShort(long offset, Object base, long length, boolean readOnly, MemorySessionImpl session) {
+            super(offset, base, length, readOnly, session);
+        }
+
+        @Override
+        OfShort dup(long offset, long size, boolean readOnly, MemorySessionImpl scope) {
+            return new OfShort(this.offset + offset, base, size, readOnly, scope);
+        }
+
+        @Override
+        public short[] unsafeGetBase() {
+            return (short[])Objects.requireNonNull(base);
+        }
+
+        @Override
+        public long maxAlignMask() {
+            return MAX_ALIGN_SHORT_ARRAY;
+        }
+
+        @Override
+        public long address() {
+            return offset - Utils.BaseAndScale.SHORT.base();
+        }
+    }
+
+    public static final class OfInt extends HeapMemorySegmentImpl {
+
+        OfInt(long offset, Object base, long length, boolean readOnly, MemorySessionImpl session) {
+            super(offset, base, length, readOnly, session);
+        }
+
+        @Override
+        OfInt dup(long offset, long size, boolean readOnly, MemorySessionImpl scope) {
+            return new OfInt(this.offset + offset, base, size, readOnly, scope);
+        }
+
+        @Override
+        public int[] unsafeGetBase() {
+            return (int[])Objects.requireNonNull(base);
+        }
+
+        @Override
+        public long maxAlignMask() {
+            return MAX_ALIGN_INT_ARRAY;
+        }
+
+        @Override
+        public long address() {
+            return offset - Utils.BaseAndScale.INT.base();
+        }
+    }
+
+    public static final class OfLong extends HeapMemorySegmentImpl {
+
+        OfLong(long offset, Object base, long length, boolean readOnly, MemorySessionImpl session) {
+            super(offset, base, length, readOnly, session);
+        }
+
+        @Override
+        OfLong dup(long offset, long size, boolean readOnly, MemorySessionImpl scope) {
+            return new OfLong(this.offset + offset, base, size, readOnly, scope);
+        }
+
+        @Override
+        public long[] unsafeGetBase() {
+            return (long[])Objects.requireNonNull(base);
+        }
+
+        @Override
+        public long maxAlignMask() {
+            return MAX_ALIGN_LONG_ARRAY;
+        }
+
+        @Override
+        public long address() {
+            return offset - Utils.BaseAndScale.LONG.base();
+        }
+    }
+
+    public static final class OfFloat extends HeapMemorySegmentImpl {
+
+        OfFloat(long offset, Object base, long length, boolean readOnly, MemorySessionImpl session) {
+            super(offset, base, length, readOnly, session);
+        }
+
+        @Override
+        OfFloat dup(long offset, long size, boolean readOnly, MemorySessionImpl scope) {
+            return new OfFloat(this.offset + offset, base, size, readOnly, scope);
+        }
+
+        @Override
+        public float[] unsafeGetBase() {
+            return (float[])Objects.requireNonNull(base);
+        }
+
+        @Override
+        public long maxAlignMask() {
+            return MAX_ALIGN_INT_ARRAY;
+        }
+
+        @Override
+        public long address() {
+            return offset - Utils.BaseAndScale.FLOAT.base();
+        }
+    }
+
+    public static final class OfDouble extends HeapMemorySegmentImpl {
+
+        OfDouble(long offset, Object base, long length, boolean readOnly, MemorySessionImpl session) {
+            super(offset, base, length, readOnly, session);
+        }
+
+        @Override
+        OfDouble dup(long offset, long size, boolean readOnly, MemorySessionImpl scope) {
+            return new OfDouble(this.offset + offset, base, size, readOnly, scope);
+        }
+
+        @Override
+        public double[] unsafeGetBase() {
+            return (double[])Objects.requireNonNull(base);
+        }
+
+        @Override
+        public long maxAlignMask() {
+            return MAX_ALIGN_LONG_ARRAY;
+        }
+
+        @Override
+        public long address() {
+            return offset - Utils.BaseAndScale.DOUBLE.base();
+        }
+    }
+
+}
diff --git a/tests/test_data/std/jdk/internal/foreign/ImplicitSession.class b/tests/test_data/std/jdk/internal/foreign/ImplicitSession.class
new file mode 100644
index 0000000000000000000000000000000000000000..fc103498f988822bbef686880fa1643d79a4588d
GIT binary patch
literal 1280
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zJJR%H{#@j$X+L#sSJA{9J`Y0?+Nd(r{$sCfP&#Y>2BetDm9$Y~SowPwhI=^P9ja@z
zN7$sHr|44zeSeIe8+6_z?HSUsJzxF`Rw<W1!~TMcuRqaM3M+KZkOQy|3mYU?af`IY
z0R*?PN*a*I9TbR=;Vv>m;##azxbhh;kLk>R0C+%jwV28wH<QzViuy4ksF2;<u`$?i
z1CJ6wHUi#5k#0>%>-08$sq{y4##IcE+X-Z9ge;9hR)<LI3|D`g!#+u1tsypra_m*1
Un7|yx+JKAuR+b8!!NW}UH@8+T`2YX_

literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/foreign/ImplicitSession.java b/tests/test_data/std/jdk/internal/foreign/ImplicitSession.java
new file mode 100644
index 00000000..0eb36425
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/foreign/ImplicitSession.java
@@ -0,0 +1,67 @@
+/*
+ * Copyright (c) 2022, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package jdk.internal.foreign;
+
+import sun.nio.ch.DirectBuffer;
+
+import java.lang.ref.Cleaner;
+import java.lang.ref.Reference;
+
+/**
+ * This is an implicit, GC-backed memory session. Implicit sessions cannot be closed explicitly.
+ * While it would be possible to model an implicit session as a non-closeable view of a shared
+ * session, it is better to capture the fact that an implicit session is not just a non-closeable
+ * view of some session which might be closeable. This is useful e.g. in the implementations of
+ * {@link DirectBuffer#address()}, where obtaining an address of a buffer instance associated
+ * with a potentially closeable session is forbidden.
+ */
+final class ImplicitSession extends SharedSession {
+
+    public ImplicitSession(Cleaner cleaner) {
+        super();
+        cleaner.register(this, resourceList);
+    }
+
+    @Override
+    public void release0() {
+        Reference.reachabilityFence(this);
+    }
+
+    @Override
+    public void acquire0() {
+        // do nothing
+    }
+
+    @Override
+    public boolean isCloseable() {
+        return false;
+    }
+
+    @Override
+    public void justClose() {
+        throw nonCloseable();
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/foreign/LayoutPath$DereferenceElement.class b/tests/test_data/std/jdk/internal/foreign/LayoutPath$DereferenceElement.class
new file mode 100644
index 0000000000000000000000000000000000000000..c2a2892846ec85a884a40e4af0915ead97d4657e
GIT binary patch
literal 2159
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diff --git a/tests/test_data/std/jdk/internal/foreign/LayoutPath$GroupElementByIndex.class b/tests/test_data/std/jdk/internal/foreign/LayoutPath$GroupElementByIndex.class
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diff --git a/tests/test_data/std/jdk/internal/foreign/LayoutPath$GroupElementByName.class b/tests/test_data/std/jdk/internal/foreign/LayoutPath$GroupElementByName.class
new file mode 100644
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diff --git a/tests/test_data/std/jdk/internal/foreign/LayoutPath$SequenceElement.class b/tests/test_data/std/jdk/internal/foreign/LayoutPath$SequenceElement.class
new file mode 100644
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diff --git a/tests/test_data/std/jdk/internal/foreign/LayoutPath$SequenceElementByIndex.class b/tests/test_data/std/jdk/internal/foreign/LayoutPath$SequenceElementByIndex.class
new file mode 100644
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GIT binary patch
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diff --git a/tests/test_data/std/jdk/internal/foreign/LayoutPath$SequenceElementByRange.class b/tests/test_data/std/jdk/internal/foreign/LayoutPath$SequenceElementByRange.class
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GIT binary patch
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diff --git a/tests/test_data/std/jdk/internal/foreign/LayoutPath.class b/tests/test_data/std/jdk/internal/foreign/LayoutPath.class
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HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/foreign/LayoutPath.java b/tests/test_data/std/jdk/internal/foreign/LayoutPath.java
new file mode 100644
index 00000000..ebd83d1c
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/foreign/LayoutPath.java
@@ -0,0 +1,502 @@
+/*
+ *  Copyright (c) 2019, 2024, Oracle and/or its affiliates. All rights reserved.
+ *  DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ *  This code is free software; you can redistribute it and/or modify it
+ *  under the terms of the GNU General Public License version 2 only, as
+ *  published by the Free Software Foundation.  Oracle designates this
+ *  particular file as subject to the "Classpath" exception as provided
+ *  by Oracle in the LICENSE file that accompanied this code.
+ *
+ *  This code is distributed in the hope that it will be useful, but WITHOUT
+ *  ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ *  FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ *  version 2 for more details (a copy is included in the LICENSE file that
+ *  accompanied this code).
+ *
+ *  You should have received a copy of the GNU General Public License version
+ *  2 along with this work; if not, write to the Free Software Foundation,
+ *  Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ *   Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ *  or visit www.oracle.com if you need additional information or have any
+ *  questions.
+ *
+ */
+package jdk.internal.foreign;
+
+import jdk.internal.vm.annotation.ForceInline;
+
+import java.lang.foreign.AddressLayout;
+import java.lang.foreign.GroupLayout;
+import java.lang.foreign.MemoryLayout;
+import java.lang.foreign.MemorySegment;
+import java.lang.foreign.SequenceLayout;
+import java.lang.foreign.StructLayout;
+import java.lang.foreign.ValueLayout;
+import java.lang.invoke.MethodHandle;
+import java.lang.invoke.MethodHandles;
+import java.lang.invoke.MethodType;
+import java.lang.invoke.VarHandle;
+import java.util.Arrays;
+import java.util.List;
+import java.util.Objects;
+import java.util.function.UnaryOperator;
+import java.util.stream.IntStream;
+import java.util.stream.Stream;
+
+import static java.util.stream.Collectors.joining;
+
+/**
+ * This class provide support for constructing layout paths; that is, starting from a root path (see {@link #rootPath(MemoryLayout)}),
+ * a path can be constructed by selecting layout elements using the selector methods provided by this class
+ * (see {@link #sequenceElement()}, {@link #sequenceElement(long)}, {@link #sequenceElement(long, long)}, {@link #groupElement(String)}).
+ * Once a path has been fully constructed, clients can ask for the offset associated with the layout element selected
+ * by the path (see {@link #offset}), or obtain var handle to access the selected layout element
+ * given an address pointing to a segment associated with the root layout (see {@link #dereferenceHandle()}).
+ */
+public class LayoutPath {
+
+    private static final long[] EMPTY_STRIDES = new long[0];
+    private static final long[] EMPTY_BOUNDS = new long[0];
+    private static final MethodHandle[] EMPTY_DEREF_HANDLES = new MethodHandle[0];
+
+    private static final MethodHandle MH_ADD_SCALED_OFFSET;
+    private static final MethodHandle MH_SLICE;
+    private static final MethodHandle MH_SLICE_LAYOUT;
+    private static final MethodHandle MH_CHECK_ENCL_LAYOUT;
+    private static final MethodHandle MH_SEGMENT_RESIZE;
+    private static final MethodHandle MH_ADD;
+
+    static {
+        try {
+            MethodHandles.Lookup lookup = MethodHandles.lookup();
+            MH_ADD_SCALED_OFFSET = lookup.findStatic(LayoutPath.class, "addScaledOffset",
+                    MethodType.methodType(long.class, long.class, long.class, long.class, long.class));
+            MH_SLICE = lookup.findVirtual(MemorySegment.class, "asSlice",
+                    MethodType.methodType(MemorySegment.class, long.class, long.class));
+            MH_SLICE_LAYOUT = lookup.findVirtual(MemorySegment.class, "asSlice",
+                    MethodType.methodType(MemorySegment.class, long.class, MemoryLayout.class));
+            MH_CHECK_ENCL_LAYOUT = lookup.findStatic(LayoutPath.class, "checkEnclosingLayout",
+                    MethodType.methodType(void.class, MemorySegment.class, long.class, MemoryLayout.class));
+            MH_SEGMENT_RESIZE = lookup.findStatic(LayoutPath.class, "resizeSegment",
+                    MethodType.methodType(MemorySegment.class, MemorySegment.class, MemoryLayout.class));
+            MH_ADD = lookup.findStatic(Long.class, "sum",
+                    MethodType.methodType(long.class, long.class, long.class));
+        } catch (Throwable ex) {
+            throw new ExceptionInInitializerError(ex);
+        }
+    }
+
+    private final MemoryLayout layout;
+    private final long offset;
+    private final LayoutPath enclosing;
+    private final long[] strides;
+    private final long[] bounds;
+    private final MethodHandle[] derefAdapters;
+
+    private LayoutPath(MemoryLayout layout, long offset, long[] strides, long[] bounds, MethodHandle[] derefAdapters, LayoutPath enclosing) {
+        this.layout = layout;
+        this.offset = offset;
+        this.strides = strides;
+        this.bounds = bounds;
+        this.derefAdapters = derefAdapters;
+        this.enclosing = enclosing;
+    }
+
+    // Layout path selector methods
+
+    public LayoutPath sequenceElement() {
+        SequenceLayout seq = requireSequenceLayout();
+        MemoryLayout elem = seq.elementLayout();
+        return LayoutPath.nestedPath(elem, offset, addStride(elem.byteSize()), addBound(seq.elementCount()), derefAdapters, this);
+    }
+
+    public LayoutPath sequenceElement(long start, long step) {
+        SequenceLayout seq = requireSequenceLayout();
+        checkSequenceBounds(seq, start);
+        MemoryLayout elem = seq.elementLayout();
+        long elemSize = elem.byteSize();
+        long nelems = step > 0 ?
+                seq.elementCount() - start :
+                start + 1;
+        long maxIndex = Math.ceilDiv(nelems, Math.abs(step));
+        return LayoutPath.nestedPath(elem, offset + (start * elemSize),
+                addStride(elemSize * step), addBound(maxIndex), derefAdapters, this);
+    }
+
+    public LayoutPath sequenceElement(long index) {
+        SequenceLayout seq = requireSequenceLayout();
+        checkSequenceBounds(seq, index);
+        long elemSize = seq.elementLayout().byteSize();
+        long elemOffset = elemSize * index;
+        return LayoutPath.nestedPath(seq.elementLayout(), offset + elemOffset, strides, bounds, derefAdapters, this);
+    }
+
+    public LayoutPath groupElement(String name) {
+        GroupLayout g = requireGroupLayout();
+        long offset = 0;
+        MemoryLayout elem = null;
+        for (int i = 0; i < g.memberLayouts().size(); i++) {
+            MemoryLayout l = g.memberLayouts().get(i);
+            if (l.name().isPresent() &&
+                l.name().get().equals(name)) {
+                elem = l;
+                break;
+            } else if (g instanceof StructLayout) {
+                offset += l.byteSize();
+            }
+        }
+        if (elem == null) {
+            throw badLayoutPath(
+                    String.format("cannot resolve '%s' in layout %s", name, breadcrumbs()));
+        }
+        return LayoutPath.nestedPath(elem, this.offset + offset, strides, bounds, derefAdapters, this);
+    }
+
+    public LayoutPath groupElement(long index) {
+        GroupLayout g = requireGroupLayout();
+        long elemSize = g.memberLayouts().size();
+        long offset = 0;
+        MemoryLayout elem = null;
+        for (int i = 0; i <= index; i++) {
+            if (i == elemSize) {
+                throw badLayoutPath(
+                        String.format("cannot resolve element %d in layout: %s", index, breadcrumbs()));
+            }
+            elem = g.memberLayouts().get(i);
+            if (g instanceof StructLayout && i < index) {
+                offset += elem.byteSize();
+            }
+        }
+        return LayoutPath.nestedPath(elem, this.offset + offset, strides, bounds, derefAdapters, this);
+    }
+
+    public LayoutPath derefElement() {
+        if (!(layout instanceof AddressLayout addressLayout) ||
+                addressLayout.targetLayout().isEmpty()) {
+            throw badLayoutPath(
+                    String.format("Cannot dereference layout: %s", breadcrumbs()));
+        }
+        MemoryLayout derefLayout = addressLayout.targetLayout().get();
+        MethodHandle handle = dereferenceHandle(false).toMethodHandle(VarHandle.AccessMode.GET);
+        handle = MethodHandles.filterReturnValue(handle,
+                MethodHandles.insertArguments(MH_SEGMENT_RESIZE, 1, derefLayout));
+        return derefPath(derefLayout, handle, this);
+    }
+
+    private static MemorySegment resizeSegment(MemorySegment segment, MemoryLayout layout) {
+        return Utils.longToAddress(segment.address(), layout.byteSize(), layout.byteAlignment());
+    }
+
+    // Layout path projections
+
+    public long offset() {
+        return offset;
+    }
+
+    public VarHandle dereferenceHandle() {
+        return dereferenceHandle(true);
+    }
+
+    public VarHandle dereferenceHandle(boolean adapt) {
+        if (!(layout instanceof ValueLayout valueLayout)) {
+            throw new IllegalArgumentException(
+                    String.format("Path does not select a value layout: %s", breadcrumbs()));
+        }
+
+        VarHandle handle = Utils.makeRawSegmentViewVarHandle(valueLayout);
+        handle = MethodHandles.collectCoordinates(handle, 1, offsetHandle());
+
+        // we only have to check the alignment of the root layout for the first dereference we do,
+        // as each dereference checks the alignment of the target address when constructing its segment
+        // (see Utils::longToAddress)
+        if (derefAdapters.length == 0) {
+            // insert align check for the root layout on the initial MS + offset
+            List<Class<?>> coordinateTypes = handle.coordinateTypes();
+            MethodHandle alignCheck = MethodHandles.insertArguments(MH_CHECK_ENCL_LAYOUT, 2, rootLayout());
+            handle = MethodHandles.collectCoordinates(handle, 0, alignCheck);
+            int[] reorder = IntStream.concat(IntStream.of(0, 1), IntStream.range(0, coordinateTypes.size())).toArray();
+            handle = MethodHandles.permuteCoordinates(handle, coordinateTypes, reorder);
+        }
+
+        if (adapt) {
+            if (derefAdapters.length > 0) {
+                // plug up the base offset if we have at least 1 enclosing dereference
+                handle = MethodHandles.insertCoordinates(handle, 1, 0);
+            }
+            for (int i = derefAdapters.length; i > 0; i--) {
+                MethodHandle adapter = derefAdapters[i - 1];
+                // the first/outermost adapter will have a base offset coordinate, the rest are constant 0
+                if (i > 1) {
+                    // plug in a constant 0 base offset for all but the outermost access in a deref chain
+                    adapter = MethodHandles.insertArguments(adapter, 1, 0);
+                }
+                handle = MethodHandles.collectCoordinates(handle, 0, adapter);
+            }
+        }
+        return handle;
+    }
+
+    @ForceInline
+    private static long addScaledOffset(long base, long index, long stride, long bound) {
+        Objects.checkIndex(index, bound);
+        return base + (stride * index);
+    }
+
+    public MethodHandle offsetHandle() {
+        MethodHandle mh = MethodHandles.insertArguments(MH_ADD, 0, offset);
+        for (int i = strides.length - 1; i >= 0; i--) {
+            MethodHandle collector = MethodHandles.insertArguments(MH_ADD_SCALED_OFFSET, 2, strides[i], bounds[i]);
+            // (J, ...) -> J to (J, J, ...) -> J
+            // i.e. new coord is prefixed. Last coord will correspond to innermost layout
+            mh = MethodHandles.collectArguments(mh, 0, collector);
+        }
+
+        return mh;
+    }
+
+    private MemoryLayout rootLayout() {
+        return enclosing != null ? enclosing.rootLayout() : this.layout;
+    }
+
+    public MethodHandle sliceHandle() {
+        MethodHandle sliceHandle;
+        if (enclosing != null) {
+            // drop the alignment check for the accessed element, we check the root layout instead
+            sliceHandle = MH_SLICE; // (MS, long, long) -> MS
+            sliceHandle = MethodHandles.insertArguments(sliceHandle, 2, layout.byteSize()); // (MS, long) -> MS
+        } else {
+            sliceHandle = MH_SLICE_LAYOUT; // (MS, long, MemoryLayout) -> MS
+            sliceHandle = MethodHandles.insertArguments(sliceHandle, 2, layout); // (MS, long) -> MS
+        }
+        sliceHandle = MethodHandles.collectArguments(sliceHandle, 1, offsetHandle()); // (MS, long, ...) -> MS
+
+        if (enclosing != null) {
+            // insert align check for the root layout on the initial MS + offset
+            MethodType oldType = sliceHandle.type();
+            MethodHandle alignCheck = MethodHandles.insertArguments(MH_CHECK_ENCL_LAYOUT, 2, rootLayout());
+            sliceHandle = MethodHandles.collectArguments(sliceHandle, 0, alignCheck); // (MS, long, MS, long) -> MS
+            int[] reorder = IntStream.concat(IntStream.of(0, 1), IntStream.range(0, oldType.parameterCount())).toArray();
+            sliceHandle = MethodHandles.permuteArguments(sliceHandle, oldType, reorder); // (MS, long, ...) -> MS
+        }
+
+        return sliceHandle;
+    }
+
+    private static void checkEnclosingLayout(MemorySegment segment, long offset, MemoryLayout enclosing) {
+        ((AbstractMemorySegmentImpl)segment).checkAccess(offset, enclosing.byteSize(), true);
+        if (!((AbstractMemorySegmentImpl) segment).isAlignedForElement(offset, enclosing)) {
+            throw new IllegalArgumentException(String.format(
+                    "Target offset %d is incompatible with alignment constraint %d (of %s) for segment %s"
+                    , offset, enclosing.byteAlignment(), enclosing, segment));
+        }
+    }
+
+    public MemoryLayout layout() {
+        return layout;
+    }
+
+    // Layout path construction
+
+    public static LayoutPath rootPath(MemoryLayout layout) {
+        return new LayoutPath(layout, 0L, EMPTY_STRIDES, EMPTY_BOUNDS, EMPTY_DEREF_HANDLES, null);
+    }
+
+    private static LayoutPath nestedPath(MemoryLayout layout, long offset, long[] strides, long[] bounds, MethodHandle[] derefAdapters, LayoutPath encl) {
+        return new LayoutPath(layout, offset, strides, bounds, derefAdapters, encl);
+    }
+
+    private static LayoutPath derefPath(MemoryLayout layout, MethodHandle handle, LayoutPath encl) {
+        MethodHandle[] handles = Arrays.copyOf(encl.derefAdapters, encl.derefAdapters.length + 1);
+        handles[encl.derefAdapters.length] = handle;
+        return new LayoutPath(layout, 0L, EMPTY_STRIDES, EMPTY_BOUNDS, handles, null);
+    }
+
+    // Helper methods
+
+    private SequenceLayout requireSequenceLayout() {
+        return requireLayoutType(SequenceLayout.class, "sequence");
+    }
+
+    private GroupLayout requireGroupLayout() {
+        return requireLayoutType(GroupLayout.class, "group");
+    }
+
+    private <T extends MemoryLayout> T requireLayoutType(Class<T> layoutClass, String name) {
+        if (!layoutClass.isAssignableFrom(layout.getClass())) {
+            throw badLayoutPath(
+                    String.format("attempting to select a %s element from a non-%s layout: %s",
+                            name, name, breadcrumbs()));
+        }
+        return layoutClass.cast(layout);
+    }
+
+    private void checkSequenceBounds(SequenceLayout seq, long index) {
+        if (index >= seq.elementCount()) {
+            throw badLayoutPath(String.format("sequence index out of bounds; index: %d, elementCount is %d for layout %s",
+                    index, seq.elementCount(), breadcrumbs()));
+        }
+    }
+
+    private static IllegalArgumentException badLayoutPath(String cause) {
+        return new IllegalArgumentException("Bad layout path: " + cause);
+    }
+
+    private long[] addStride(long stride) {
+        long[] newStrides = Arrays.copyOf(strides, strides.length + 1);
+        newStrides[strides.length] = stride;
+        return newStrides;
+    }
+
+    private long[] addBound(long maxIndex) {
+        long[] newBounds = Arrays.copyOf(bounds, bounds.length + 1);
+        newBounds[bounds.length] = maxIndex;
+        return newBounds;
+    }
+
+    private String breadcrumbs() {
+        return Stream.iterate(this, Objects::nonNull, lp -> lp.enclosing)
+                .map(LayoutPath::layout)
+                .map(Object::toString)
+                .collect(joining(", selected from: "));
+    }
+
+    public record GroupElementByName(String name)
+            implements MemoryLayout.PathElement, UnaryOperator<LayoutPath> {
+
+        // Assert invariants
+        public GroupElementByName {
+            Objects.requireNonNull(name);
+        }
+
+        @Override
+        public LayoutPath apply(LayoutPath layoutPath) {
+            return layoutPath.groupElement(name);
+        }
+
+        @Override
+        public String toString() {
+            return "groupElement(\"" + name + "\")";
+        }
+    }
+
+    public record GroupElementByIndex(long index)
+            implements MemoryLayout.PathElement, UnaryOperator<LayoutPath> {
+
+        // Assert invariants
+        public GroupElementByIndex {
+            if (index < 0) {
+                throw new IllegalArgumentException("Index < 0");
+            }
+        }
+
+        @Override
+        public LayoutPath apply(LayoutPath layoutPath) {
+            return layoutPath.groupElement(index);
+        }
+
+        @Override
+        public String toString() {
+            return "groupElement(" + index + ")";
+        }
+
+    }
+
+    public record SequenceElementByIndex(long index)
+            implements MemoryLayout.PathElement, UnaryOperator<LayoutPath> {
+
+        // Assert invariants
+        public SequenceElementByIndex {
+            if (index < 0) {
+                throw new IllegalArgumentException("Index < 0");
+            }
+        }
+
+        @Override
+        public LayoutPath apply(LayoutPath layoutPath) {
+            return layoutPath.sequenceElement(index);
+        }
+
+        @Override
+        public String toString() {
+            return "sequenceElement(" + index + ")";
+        }
+
+    }
+
+    public record SequenceElementByRange(long start, long step)
+            implements MemoryLayout.PathElement, UnaryOperator<LayoutPath> {
+
+        // Assert invariants
+        public SequenceElementByRange {
+            if (start < 0) {
+                throw new IllegalArgumentException("Start index must be positive: " + start);
+            }
+            if (step == 0) {
+                throw new IllegalArgumentException("Step must be != 0: " + step);
+            }
+        }
+
+        @Override
+        public LayoutPath apply(LayoutPath layoutPath) {
+            return layoutPath.sequenceElement(start, step);
+        }
+
+        @Override
+        public String toString() {
+            return "sequenceElement(" + start + ", " + step + ")";
+        }
+
+    }
+
+    public record SequenceElement()
+            implements MemoryLayout.PathElement, UnaryOperator<LayoutPath> {
+
+        private static final SequenceElement INSTANCE = new SequenceElement();
+
+        @Override
+        public LayoutPath apply(LayoutPath layoutPath) {
+            return layoutPath.sequenceElement();
+        }
+
+        @Override
+        public String toString() {
+            return "sequenceElement()";
+        }
+
+        public static MemoryLayout.PathElement instance() {
+            return INSTANCE;
+        }
+
+    }
+
+    public record DereferenceElement()
+            implements MemoryLayout.PathElement, UnaryOperator<LayoutPath> {
+
+        private static final DereferenceElement INSTANCE = new DereferenceElement();
+
+        @Override
+        public LayoutPath apply(LayoutPath layoutPath) {
+            return layoutPath.derefElement();
+        }
+
+        // Overriding here will ensure DereferenceElement will have a hash code
+        // that is different from the hash code of SequenceElement.
+        @Override
+        public int hashCode() {
+            return 31;
+        }
+
+        @Override
+        public String toString() {
+            return "dereferenceElement()";
+        }
+
+        public static MemoryLayout.PathElement instance() {
+            return INSTANCE;
+        }
+
+    }
+
+}
diff --git a/tests/test_data/std/jdk/internal/foreign/MappedMemorySegmentImpl.class b/tests/test_data/std/jdk/internal/foreign/MappedMemorySegmentImpl.class
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diff --git a/tests/test_data/std/jdk/internal/foreign/MappedMemorySegmentImpl.java b/tests/test_data/std/jdk/internal/foreign/MappedMemorySegmentImpl.java
new file mode 100644
index 00000000..e313780a
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/foreign/MappedMemorySegmentImpl.java
@@ -0,0 +1,95 @@
+/*
+ * Copyright (c) 2020, 2023, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package jdk.internal.foreign;
+
+import java.nio.ByteBuffer;
+import jdk.internal.access.foreign.UnmapperProxy;
+import jdk.internal.misc.ScopedMemoryAccess;
+
+/**
+ * Implementation for a mapped memory segments. A mapped memory segment is a native memory segment, which
+ * additionally features an {@link UnmapperProxy} object. This object provides detailed information about the
+ * memory mapped segment, such as the file descriptor associated with the mapping. This information is crucial
+ * in order to correctly reconstruct a byte buffer object from the segment (see {@link #makeByteBuffer()}).
+ */
+final class MappedMemorySegmentImpl extends NativeMemorySegmentImpl {
+
+    private final UnmapperProxy unmapper;
+
+    static final ScopedMemoryAccess SCOPED_MEMORY_ACCESS = ScopedMemoryAccess.getScopedMemoryAccess();
+
+    public MappedMemorySegmentImpl(long min, UnmapperProxy unmapper, long length, boolean readOnly, MemorySessionImpl scope) {
+        super(min, length, readOnly, scope);
+        this.unmapper = unmapper;
+    }
+
+    @Override
+    ByteBuffer makeByteBuffer() {
+        return NIO_ACCESS.newMappedByteBuffer(unmapper, min, (int)length, null, this);
+    }
+
+    @Override
+    MappedMemorySegmentImpl dup(long offset, long size, boolean readOnly, MemorySessionImpl scope) {
+        return new MappedMemorySegmentImpl(min + offset, unmapper, size, readOnly, scope);
+    }
+
+    // mapped segment methods
+
+    @Override
+    public MappedMemorySegmentImpl asSlice(long offset, long newSize) {
+        return (MappedMemorySegmentImpl)super.asSlice(offset, newSize);
+    }
+
+    @Override
+    public boolean isMapped() {
+        return true;
+    }
+
+    // support for mapped segments
+
+    public void load() {
+        if (unmapper != null) {
+            SCOPED_MEMORY_ACCESS.load(sessionImpl(), min, unmapper.isSync(), length);
+        }
+    }
+
+    public void unload() {
+        if (unmapper != null) {
+            SCOPED_MEMORY_ACCESS.unload(sessionImpl(), min, unmapper.isSync(), length);
+        }
+    }
+
+    public boolean isLoaded() {
+        return unmapper == null || SCOPED_MEMORY_ACCESS.isLoaded(sessionImpl(), min, unmapper.isSync(), length);
+    }
+
+    public void force() {
+        if (unmapper != null) {
+            SCOPED_MEMORY_ACCESS.force(sessionImpl(), unmapper.fileDescriptor(), min, unmapper.isSync(), 0, length);
+        }
+    }
+
+}
diff --git a/tests/test_data/std/jdk/internal/foreign/MemorySessionImpl$ResourceList$ResourceCleanup$1.class b/tests/test_data/std/jdk/internal/foreign/MemorySessionImpl$ResourceList$ResourceCleanup$1.class
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diff --git a/tests/test_data/std/jdk/internal/foreign/MemorySessionImpl$ResourceList$ResourceCleanup$2.class b/tests/test_data/std/jdk/internal/foreign/MemorySessionImpl$ResourceList$ResourceCleanup$2.class
new file mode 100644
index 0000000000000000000000000000000000000000..704b0e9a676c10654dda877e4548e4b97c88c5bb
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HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/foreign/MemorySessionImpl$ResourceList$ResourceCleanup.class b/tests/test_data/std/jdk/internal/foreign/MemorySessionImpl$ResourceList$ResourceCleanup.class
new file mode 100644
index 0000000000000000000000000000000000000000..3fc2f908696d30b0c0fcdbf18eea25b8e3f1bf53
GIT binary patch
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HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/foreign/MemorySessionImpl$ResourceList.class b/tests/test_data/std/jdk/internal/foreign/MemorySessionImpl$ResourceList.class
new file mode 100644
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GIT binary patch
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diff --git a/tests/test_data/std/jdk/internal/foreign/MemorySessionImpl.class b/tests/test_data/std/jdk/internal/foreign/MemorySessionImpl.class
new file mode 100644
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HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/foreign/MemorySessionImpl.java b/tests/test_data/std/jdk/internal/foreign/MemorySessionImpl.java
new file mode 100644
index 00000000..aef62be8
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/foreign/MemorySessionImpl.java
@@ -0,0 +1,321 @@
+/*
+ *  Copyright (c) 2019, 2023, Oracle and/or its affiliates. All rights reserved.
+ *  DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ *  This code is free software; you can redistribute it and/or modify it
+ *  under the terms of the GNU General Public License version 2 only, as
+ *  published by the Free Software Foundation.  Oracle designates this
+ *  particular file as subject to the "Classpath" exception as provided
+ *  by Oracle in the LICENSE file that accompanied this code.
+ *
+ *  This code is distributed in the hope that it will be useful, but WITHOUT
+ *  ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ *  FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ *  version 2 for more details (a copy is included in the LICENSE file that
+ *  accompanied this code).
+ *
+ *  You should have received a copy of the GNU General Public License version
+ *  2 along with this work; if not, write to the Free Software Foundation,
+ *  Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ *   Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ *  or visit www.oracle.com if you need additional information or have any
+ *  questions.
+ *
+ */
+
+package jdk.internal.foreign;
+
+import java.lang.foreign.MemorySegment;
+import java.lang.foreign.Arena;
+import java.lang.foreign.MemorySegment.Scope;
+import java.lang.invoke.MethodHandles;
+import java.lang.invoke.VarHandle;
+import java.lang.ref.Cleaner;
+import java.util.Objects;
+
+import jdk.internal.foreign.GlobalSession.HeapSession;
+import jdk.internal.misc.ScopedMemoryAccess;
+import jdk.internal.vm.annotation.ForceInline;
+
+/**
+ * This class manages the temporal bounds associated with a memory segment as well
+ * as thread confinement. A session has a liveness bit, which is updated when the session is closed
+ * (this operation is triggered by {@link MemorySessionImpl#close()}). This bit is consulted prior
+ * to memory access (see {@link #checkValidStateRaw()}).
+ * There are two kinds of memory session: confined memory session and shared memory session.
+ * A confined memory session has an associated owner thread that confines some operations to
+ * associated owner thread such as {@link #close()} or {@link #checkValidStateRaw()}.
+ * Shared sessions do not feature an owner thread - meaning their operations can be called, in a racy
+ * manner, by multiple threads. To guarantee temporal safety in the presence of concurrent thread,
+ * shared sessions use a more sophisticated synchronization mechanism, which guarantees that no concurrent
+ * access is possible when a session is being closed (see {@link jdk.internal.misc.ScopedMemoryAccess}).
+ */
+public abstract sealed class MemorySessionImpl
+        implements Scope
+        permits ConfinedSession, GlobalSession, SharedSession {
+    static final int OPEN = 0;
+    static final int CLOSED = -1;
+
+    static final VarHandle STATE;
+    static final int MAX_FORKS = Integer.MAX_VALUE;
+
+    static final ScopedMemoryAccess.ScopedAccessError ALREADY_CLOSED = new ScopedMemoryAccess.ScopedAccessError(MemorySessionImpl::alreadyClosed);
+    static final ScopedMemoryAccess.ScopedAccessError WRONG_THREAD = new ScopedMemoryAccess.ScopedAccessError(MemorySessionImpl::wrongThread);
+    // This is the session of all zero-length memory segments
+    public static final MemorySessionImpl GLOBAL_SESSION = new GlobalSession();
+
+    final ResourceList resourceList;
+    final Thread owner;
+    int state = OPEN;
+
+    static {
+        try {
+            STATE = MethodHandles.lookup().findVarHandle(MemorySessionImpl.class, "state", int.class);
+        } catch (Exception ex) {
+            throw new ExceptionInInitializerError(ex);
+        }
+    }
+
+    public Arena asArena() {
+        return new ArenaImpl(this);
+    }
+
+    @ForceInline
+    public static MemorySessionImpl toMemorySession(Arena arena) {
+        return (MemorySessionImpl) arena.scope();
+    }
+
+    public final boolean isCloseableBy(Thread thread) {
+        Objects.requireNonNull(thread);
+        return isCloseable() &&
+                (owner == null || owner == thread);
+    }
+
+    public void addCloseAction(Runnable runnable) {
+        Objects.requireNonNull(runnable);
+        addInternal(ResourceList.ResourceCleanup.ofRunnable(runnable));
+    }
+
+    /**
+     * Add a cleanup action. If a failure occurred (because of an add vs. close race), call the cleanup action.
+     * This semantics is useful when allocating new memory segments, since we first do a malloc/mmap and _then_
+     * we register the cleanup (free/munmap) against the session; so, if registration fails, we still have to
+     * clean up memory. From the perspective of the client, such a failure would manifest as a factory
+     * returning a segment that is already "closed" - which is always possible anyway (e.g. if the session
+     * is closed _after_ the cleanup for the segment is registered but _before_ the factory returns the
+     * new segment to the client). For this reason, it's not worth adding extra complexity to the segment
+     * initialization logic here - and using an optimistic logic works well in practice.
+     */
+    public void addOrCleanupIfFail(ResourceList.ResourceCleanup resource) {
+        try {
+            addInternal(resource);
+        } catch (Throwable ex) {
+            resource.cleanup();
+            throw ex;
+        }
+    }
+
+    void addInternal(ResourceList.ResourceCleanup resource) {
+        checkValidState();
+        // Note: from here on we no longer check the session state. Two cases are possible: either the resource cleanup
+        // is added to the list when the session is still open, in which case everything works ok; or the resource
+        // cleanup is added while the session is being closed. In this latter case, what matters is whether we have already
+        // called `ResourceList::cleanup` to run all the cleanup actions. If not, we can still add this resource
+        // to the list (and, in case of an add vs. close race, it might happen that the cleanup action will be
+        // called immediately after).
+        resourceList.add(resource);
+    }
+
+    protected MemorySessionImpl(Thread owner, ResourceList resourceList) {
+        this.owner = owner;
+        this.resourceList = resourceList;
+    }
+
+    public static MemorySessionImpl createConfined(Thread thread) {
+        return new ConfinedSession(thread);
+    }
+
+    public static MemorySessionImpl createShared() {
+        return new SharedSession();
+    }
+
+    public static MemorySessionImpl createImplicit(Cleaner cleaner) {
+        return new ImplicitSession(cleaner);
+    }
+
+    public static MemorySessionImpl createHeap(Object ref) {
+        return new HeapSession(ref);
+    }
+
+    public abstract void release0();
+
+    public abstract void acquire0();
+
+    public void whileAlive(Runnable action) {
+        Objects.requireNonNull(action);
+        acquire0();
+        try {
+            action.run();
+        } finally {
+            release0();
+        }
+    }
+
+    public final Thread ownerThread() {
+        return owner;
+    }
+
+    public final boolean isAccessibleBy(Thread thread) {
+        Objects.requireNonNull(thread);
+        return owner == null || owner == thread;
+    }
+
+    /**
+     * Returns true, if this session is still open. This method may be called in any thread.
+     * @return {@code true} if this session is not closed yet.
+     */
+    public boolean isAlive() {
+        return state >= OPEN;
+    }
+
+    /**
+     * This is a faster version of {@link #checkValidState()}, which is called upon memory access, and which
+     * relies on invariants associated with the memory session implementations (volatile access
+     * to the closed state bit is replaced with plain access). This method should be monomorphic,
+     * to avoid virtual calls in the memory access hot path. This method is not intended as general purpose method
+     * and should only be used in the memory access handle hot path; for liveness checks triggered by other API methods,
+     * please use {@link #checkValidState()}.
+     */
+    @ForceInline
+    public void checkValidStateRaw() {
+        if (owner != null && owner != Thread.currentThread()) {
+            throw WRONG_THREAD;
+        }
+        if (state < OPEN) {
+            throw ALREADY_CLOSED;
+        }
+    }
+
+    /**
+     * Checks that this session is still alive (see {@link #isAlive()}).
+     * @throws IllegalStateException if this session is already closed or if this is
+     * a confined session and this method is called outside the owner thread.
+     */
+    public void checkValidState() {
+        try {
+            checkValidStateRaw();
+        } catch (ScopedMemoryAccess.ScopedAccessError error) {
+            throw error.newRuntimeException();
+        }
+    }
+
+    public static void checkValidState(MemorySegment segment) {
+        ((AbstractMemorySegmentImpl)segment).sessionImpl().checkValidState();
+    }
+
+    @Override
+    protected Object clone() throws CloneNotSupportedException {
+        throw new CloneNotSupportedException();
+    }
+
+    public boolean isCloseable() {
+        return true;
+    }
+
+    /**
+     * Closes this session, executing any cleanup action (where provided).
+     * @throws IllegalStateException if this session is already closed or if this is
+     * a confined session and this method is called outside the owner thread.
+     */
+    public void close() {
+        justClose();
+        resourceList.cleanup();
+    }
+
+    abstract void justClose();
+
+    /**
+     * A list of all cleanup actions associated with a memory session. Cleanup actions are modelled as instances
+     * of the {@link ResourceCleanup} class, and, together, form a linked list. Depending on whether a session
+     * is shared or confined, different implementations of this class will be used, see {@link ConfinedSession.ConfinedResourceList}
+     * and {@link SharedSession.SharedResourceList}.
+     */
+    public abstract static class ResourceList implements Runnable {
+        ResourceCleanup fst;
+
+        abstract void add(ResourceCleanup cleanup);
+
+        abstract void cleanup();
+
+        public final void run() {
+            cleanup(); // cleaner interop
+        }
+
+        static void cleanup(ResourceCleanup first) {
+            RuntimeException pendingException = null;
+            ResourceCleanup current = first;
+            while (current != null) {
+                try {
+                    current.cleanup();
+                } catch (RuntimeException ex) {
+                    if (pendingException == null) {
+                        pendingException = ex;
+                    } else if (ex != pendingException) {
+                        // note: self-suppression is not supported
+                        pendingException.addSuppressed(ex);
+                    }
+                }
+                current = current.next;
+            }
+            if (pendingException != null) {
+                throw pendingException;
+            }
+        }
+
+        public abstract static class ResourceCleanup {
+            ResourceCleanup next;
+
+            public abstract void cleanup();
+
+            static final ResourceCleanup CLOSED_LIST = new ResourceCleanup() {
+                @Override
+                public void cleanup() {
+                    throw new IllegalStateException("This resource list has already been closed!");
+                }
+            };
+
+            static ResourceCleanup ofRunnable(Runnable cleanupAction) {
+                return new ResourceCleanup() {
+                    @Override
+                    public void cleanup() {
+                        cleanupAction.run();
+                    }
+                };
+            }
+        }
+    }
+
+    // helper functions to centralize error handling
+
+    static IllegalStateException tooManyAcquires() {
+        return new IllegalStateException("Session acquire limit exceeded");
+    }
+
+    static IllegalStateException alreadyAcquired(int acquires) {
+        return new IllegalStateException(String.format("Session is acquired by %d clients", acquires));
+    }
+
+    static IllegalStateException alreadyClosed() {
+        return new IllegalStateException("Already closed");
+    }
+
+    static WrongThreadException wrongThread() {
+        return new WrongThreadException("Attempted access outside owning thread");
+    }
+
+    static UnsupportedOperationException nonCloseable() {
+        return new UnsupportedOperationException("Attempted to close a non-closeable session");
+    }
+
+}
diff --git a/tests/test_data/std/jdk/internal/foreign/NativeMemorySegmentImpl.class b/tests/test_data/std/jdk/internal/foreign/NativeMemorySegmentImpl.class
new file mode 100644
index 0000000000000000000000000000000000000000..648c3a3c05f496f588800586957cc830964a9f86
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diff --git a/tests/test_data/std/jdk/internal/foreign/NativeMemorySegmentImpl.java b/tests/test_data/std/jdk/internal/foreign/NativeMemorySegmentImpl.java
new file mode 100644
index 00000000..c2043cf4
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/foreign/NativeMemorySegmentImpl.java
@@ -0,0 +1,99 @@
+/*
+ *  Copyright (c) 2020, 2024, Oracle and/or its affiliates. All rights reserved.
+ *  DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ *  This code is free software; you can redistribute it and/or modify it
+ *  under the terms of the GNU General Public License version 2 only, as
+ *  published by the Free Software Foundation.  Oracle designates this
+ *  particular file as subject to the "Classpath" exception as provided
+ *  by Oracle in the LICENSE file that accompanied this code.
+ *
+ *  This code is distributed in the hope that it will be useful, but WITHOUT
+ *  ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ *  FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ *  version 2 for more details (a copy is included in the LICENSE file that
+ *  accompanied this code).
+ *
+ *  You should have received a copy of the GNU General Public License version
+ *  2 along with this work; if not, write to the Free Software Foundation,
+ *  Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ *   Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ *  or visit www.oracle.com if you need additional information or have any
+ *  questions.
+ *
+ */
+
+package jdk.internal.foreign;
+
+import java.nio.ByteBuffer;
+import java.util.Optional;
+
+import jdk.internal.misc.Unsafe;
+import jdk.internal.vm.annotation.ForceInline;
+
+/**
+ * Implementation for native memory segments. A native memory segment is essentially a wrapper around
+ * a native long address.
+ */
+sealed class NativeMemorySegmentImpl extends AbstractMemorySegmentImpl permits MappedMemorySegmentImpl {
+
+    final long min;
+
+    @ForceInline
+    NativeMemorySegmentImpl(long min, long length, boolean readOnly, MemorySessionImpl scope) {
+        super(length, readOnly, scope);
+        this.min = (Unsafe.getUnsafe().addressSize() == 4)
+                // On 32-bit systems, normalize the upper unused 32-bits to zero
+                ? min & 0x0000_0000_FFFF_FFFFL
+                // On 64-bit systems, all the bits are used
+                : min;
+    }
+
+    @Override
+    public long address() {
+        return min;
+    }
+
+    @Override
+    public Optional<Object> heapBase() {
+        return Optional.empty();
+    }
+
+    public final long maxByteAlignment() {
+        return address() == 0
+                ? 1L << 62
+                : Long.lowestOneBit(address());
+    }
+
+    @ForceInline
+    @Override
+    NativeMemorySegmentImpl dup(long offset, long size, boolean readOnly, MemorySessionImpl scope) {
+        return new NativeMemorySegmentImpl(min + offset, size, readOnly, scope);
+    }
+
+    @Override
+    ByteBuffer makeByteBuffer() {
+        return NIO_ACCESS.newDirectByteBuffer(min, (int) this.length, null, this);
+    }
+
+    @Override
+    public boolean isNative() {
+        return true;
+    }
+
+    @Override
+    public long unsafeGetOffset() {
+        return min;
+    }
+
+    @Override
+    public Object unsafeGetBase() {
+        return null;
+    }
+
+    @Override
+    public long maxAlignMask() {
+        return 0;
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/foreign/SegmentFactories$1.class b/tests/test_data/std/jdk/internal/foreign/SegmentFactories$1.class
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diff --git a/tests/test_data/std/jdk/internal/foreign/SegmentFactories$2.class b/tests/test_data/std/jdk/internal/foreign/SegmentFactories$2.class
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HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/foreign/SegmentFactories.java b/tests/test_data/std/jdk/internal/foreign/SegmentFactories.java
new file mode 100644
index 00000000..133631e2
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/foreign/SegmentFactories.java
@@ -0,0 +1,215 @@
+/*
+ * Copyright (c) 2023, 2024, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package jdk.internal.foreign;
+
+import jdk.internal.access.foreign.UnmapperProxy;
+import jdk.internal.foreign.HeapMemorySegmentImpl.OfByte;
+import jdk.internal.foreign.HeapMemorySegmentImpl.OfChar;
+import jdk.internal.foreign.HeapMemorySegmentImpl.OfDouble;
+import jdk.internal.foreign.HeapMemorySegmentImpl.OfFloat;
+import jdk.internal.foreign.HeapMemorySegmentImpl.OfInt;
+import jdk.internal.foreign.HeapMemorySegmentImpl.OfLong;
+import jdk.internal.foreign.HeapMemorySegmentImpl.OfShort;
+import jdk.internal.misc.Unsafe;
+import jdk.internal.misc.VM;
+import jdk.internal.vm.annotation.ForceInline;
+
+import java.lang.foreign.MemorySegment;
+import java.util.Objects;
+
+/**
+ * This class is used to retrieve concrete memory segment implementations, while making sure that classes
+ * are initialized in the right order (that is, that {@code MemorySegment} is always initialized first).
+ * See {@link SegmentFactories#ensureInitialized()}.
+ */
+public class SegmentFactories {
+
+    // The maximum alignment supported by malloc - typically 16 bytes on
+    // 64-bit platforms and 8 bytes on 32-bit platforms.
+    private static final long MAX_MALLOC_ALIGN = Unsafe.ADDRESS_SIZE == 4 ? 8 : 16;
+
+    private static final Unsafe UNSAFE = Unsafe.getUnsafe();
+
+    // Unsafe native segment factories. These are used by the implementation code, to skip the sanity checks
+    // associated with MemorySegment::ofAddress.
+
+    @ForceInline
+    public static MemorySegment makeNativeSegmentUnchecked(long min,
+                                                           long byteSize,
+                                                           MemorySessionImpl sessionImpl,
+                                                           boolean readOnly,
+                                                           Runnable action) {
+        ensureInitialized();
+        if (action == null) {
+            sessionImpl.checkValidState();
+        } else {
+            sessionImpl.addCloseAction(action);
+        }
+        return new NativeMemorySegmentImpl(min, byteSize, readOnly, sessionImpl);
+    }
+
+    @ForceInline
+    public static MemorySegment makeNativeSegmentUnchecked(long min, long byteSize, MemorySessionImpl sessionImpl) {
+        ensureInitialized();
+        sessionImpl.checkValidState();
+        return new NativeMemorySegmentImpl(min, byteSize, false, sessionImpl);
+    }
+
+    @ForceInline
+    public static MemorySegment makeNativeSegmentUnchecked(long min, long byteSize) {
+        ensureInitialized();
+        return new NativeMemorySegmentImpl(min, byteSize, false, MemorySessionImpl.GLOBAL_SESSION);
+    }
+
+    public static MemorySegment fromArray(byte[] arr) {
+        ensureInitialized();
+        Objects.requireNonNull(arr);
+        long byteSize = (long)arr.length * Utils.BaseAndScale.BYTE.scale();
+        return new OfByte(Utils.BaseAndScale.BYTE.base(), arr, byteSize, false,
+                MemorySessionImpl.createHeap(arr));
+    }
+
+    public static MemorySegment fromArray(short[] arr) {
+        ensureInitialized();
+        Objects.requireNonNull(arr);
+        long byteSize = (long)arr.length * Utils.BaseAndScale.SHORT.scale();
+        return new OfShort(Utils.BaseAndScale.SHORT.base(), arr, byteSize, false,
+                MemorySessionImpl.createHeap(arr));
+    }
+
+    public static MemorySegment fromArray(int[] arr) {
+        ensureInitialized();
+        Objects.requireNonNull(arr);
+        long byteSize = (long)arr.length * Utils.BaseAndScale.INT.scale();
+        return new OfInt(Utils.BaseAndScale.INT.base(), arr, byteSize, false,
+                MemorySessionImpl.createHeap(arr));
+    }
+
+    public static MemorySegment fromArray(char[] arr) {
+        ensureInitialized();
+        Objects.requireNonNull(arr);
+        long byteSize = (long)arr.length * Utils.BaseAndScale.CHAR.scale();
+        return new OfChar(Utils.BaseAndScale.CHAR.base(), arr, byteSize, false,
+                MemorySessionImpl.createHeap(arr));
+    }
+
+    public static MemorySegment fromArray(float[] arr) {
+        ensureInitialized();
+        Objects.requireNonNull(arr);
+        long byteSize = (long)arr.length * Utils.BaseAndScale.FLOAT.scale();
+        return new OfFloat(Utils.BaseAndScale.FLOAT.base(), arr, byteSize, false,
+                MemorySessionImpl.createHeap(arr));
+    }
+
+    public static MemorySegment fromArray(double[] arr) {
+        ensureInitialized();
+        Objects.requireNonNull(arr);
+        long byteSize = (long)arr.length * Utils.BaseAndScale.DOUBLE.scale();
+        return new OfDouble(Utils.BaseAndScale.DOUBLE.base(), arr, byteSize, false,
+                MemorySessionImpl.createHeap(arr));
+    }
+
+    public static MemorySegment fromArray(long[] arr) {
+        ensureInitialized();
+        Objects.requireNonNull(arr);
+        long byteSize = (long)arr.length * Utils.BaseAndScale.LONG.scale();
+        return new OfLong(Utils.BaseAndScale.LONG.base(), arr, byteSize, false,
+                MemorySessionImpl.createHeap(arr));
+    }
+
+    public static MemorySegment allocateSegment(long byteSize, long byteAlignment, MemorySessionImpl sessionImpl,
+                                                  boolean shouldReserve) {
+        ensureInitialized();
+        sessionImpl.checkValidState();
+        if (VM.isDirectMemoryPageAligned()) {
+            byteAlignment = Math.max(byteAlignment, AbstractMemorySegmentImpl.NIO_ACCESS.pageSize());
+        }
+        long alignedSize = Math.max(1L, byteAlignment > MAX_MALLOC_ALIGN ?
+                byteSize + (byteAlignment - 1) :
+                byteSize);
+
+        if (shouldReserve) {
+            AbstractMemorySegmentImpl.NIO_ACCESS.reserveMemory(alignedSize, byteSize);
+        }
+
+        long buf = allocateMemoryWrapper(alignedSize);
+        long alignedBuf = Utils.alignUp(buf, byteAlignment);
+        AbstractMemorySegmentImpl segment = new NativeMemorySegmentImpl(buf, alignedSize,
+                false, sessionImpl);
+        sessionImpl.addOrCleanupIfFail(new MemorySessionImpl.ResourceList.ResourceCleanup() {
+            @Override
+            public void cleanup() {
+                UNSAFE.freeMemory(buf);
+                if (shouldReserve) {
+                    AbstractMemorySegmentImpl.NIO_ACCESS.unreserveMemory(alignedSize, byteSize);
+                }
+            }
+        });
+        if (alignedSize != byteSize) {
+            long delta = alignedBuf - buf;
+            segment = segment.asSlice(delta, byteSize);
+        }
+        return segment;
+    }
+
+    private static long allocateMemoryWrapper(long size) {
+        try {
+            return UNSAFE.allocateMemory(size);
+        } catch (IllegalArgumentException ex) {
+            throw new OutOfMemoryError();
+        }
+    }
+
+    public static MemorySegment mapSegment(long size, UnmapperProxy unmapper, boolean readOnly, MemorySessionImpl sessionImpl) {
+        ensureInitialized();
+        if (unmapper != null) {
+            AbstractMemorySegmentImpl segment =
+                    new MappedMemorySegmentImpl(unmapper.address(), unmapper, size,
+                            readOnly, sessionImpl);
+            MemorySessionImpl.ResourceList.ResourceCleanup resource =
+                    new MemorySessionImpl.ResourceList.ResourceCleanup() {
+                        @Override
+                        public void cleanup() {
+                            unmapper.unmap();
+                        }
+                    };
+            sessionImpl.addOrCleanupIfFail(resource);
+            return segment;
+        } else {
+            return new MappedMemorySegmentImpl(0, null, 0, readOnly, sessionImpl);
+        }
+    }
+
+    // The method below needs to be called before any concrete subclass of MemorySegment
+    // is instantiated. This is to make sure that we cannot have an initialization deadlock
+    // where one thread attempts to initialize e.g. MemorySegment (and then NativeMemorySegmentImpl, via
+    // the MemorySegment.NULL field) while another thread is attempting to initialize
+    // NativeMemorySegmentImpl (and then MemorySegment, the super-interface).
+    @ForceInline
+    private static void ensureInitialized() {
+        MemorySegment segment = MemorySegment.NULL;
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/foreign/SharedSession$SharedResourceList.class b/tests/test_data/std/jdk/internal/foreign/SharedSession$SharedResourceList.class
new file mode 100644
index 0000000000000000000000000000000000000000..de3f33daa3696f11d32113074717d844c86d5ea7
GIT binary patch
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/foreign/SharedSession.class b/tests/test_data/std/jdk/internal/foreign/SharedSession.class
new file mode 100644
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GIT binary patch
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/foreign/SharedSession.java b/tests/test_data/std/jdk/internal/foreign/SharedSession.java
new file mode 100644
index 00000000..1569589e
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/foreign/SharedSession.java
@@ -0,0 +1,141 @@
+/*
+ * Copyright (c) 2021, 2022, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package jdk.internal.foreign;
+
+import java.lang.invoke.MethodHandles;
+import java.lang.invoke.VarHandle;
+import jdk.internal.misc.ScopedMemoryAccess;
+import jdk.internal.vm.annotation.ForceInline;
+
+/**
+ * A shared session, which can be shared across multiple threads. Closing a shared session has to ensure that
+ * (i) only one thread can successfully close a session (e.g. in a close vs. close race) and that
+ * (ii) no other thread is accessing the memory associated with this session while the segment is being
+ * closed. To ensure the former condition, a CAS is performed on the liveness bit. Ensuring the latter
+ * is trickier, and require a complex synchronization protocol (see {@link jdk.internal.misc.ScopedMemoryAccess}).
+ * Since it is the responsibility of the closing thread to make sure that no concurrent access is possible,
+ * checking the liveness bit upon access can be performed in plain mode, as in the confined case.
+ */
+sealed class SharedSession extends MemorySessionImpl permits ImplicitSession {
+
+    private static final ScopedMemoryAccess SCOPED_MEMORY_ACCESS = ScopedMemoryAccess.getScopedMemoryAccess();
+
+    SharedSession() {
+        super(null, new SharedResourceList());
+    }
+
+    @Override
+    @ForceInline
+    public void acquire0() {
+        int value;
+        do {
+            value = (int) STATE.getVolatile(this);
+            if (value < OPEN) {
+                //segment is not open!
+                throw alreadyClosed();
+            } else if (value == MAX_FORKS) {
+                //overflow
+                throw tooManyAcquires();
+            }
+        } while (!STATE.compareAndSet(this, value, value + 1));
+    }
+
+    @Override
+    @ForceInline
+    public void release0() {
+        int value;
+        do {
+            value = (int) STATE.getVolatile(this);
+            if (value <= OPEN) {
+                //cannot get here - we can't close segment twice
+                throw alreadyClosed();
+            }
+        } while (!STATE.compareAndSet(this, value, value - 1));
+    }
+
+    void justClose() {
+        int prevState = (int) STATE.compareAndExchange(this, OPEN, CLOSED);
+        if (prevState < 0) {
+            throw alreadyClosed();
+        } else if (prevState != OPEN) {
+            throw alreadyAcquired(prevState);
+        }
+        SCOPED_MEMORY_ACCESS.closeScope(this, ALREADY_CLOSED);
+    }
+
+    /**
+     * A shared resource list; this implementation has to handle add vs. add races, as well as add vs. cleanup races.
+     */
+    static class SharedResourceList extends ResourceList {
+
+        static final VarHandle FST;
+
+        static {
+            try {
+                FST = MethodHandles.lookup().findVarHandle(ResourceList.class, "fst", ResourceCleanup.class);
+            } catch (Throwable ex) {
+                throw new ExceptionInInitializerError();
+            }
+        }
+
+        @Override
+        void add(ResourceCleanup cleanup) {
+            while (true) {
+                ResourceCleanup prev = (ResourceCleanup) FST.getVolatile(this);
+                if (prev == ResourceCleanup.CLOSED_LIST) {
+                    // too late
+                    throw alreadyClosed();
+                }
+                cleanup.next = prev;
+                if (FST.compareAndSet(this, prev, cleanup)) {
+                    return; //victory
+                }
+                // keep trying
+            }
+        }
+
+        void cleanup() {
+            // At this point we are only interested about add vs. close races - not close vs. close
+            // (because MemorySessionImpl::justClose ensured that this thread won the race to close the session).
+            // So, the only "bad" thing that could happen is that some other thread adds to this list
+            // while we're closing it.
+            if (FST.getAcquire(this) != ResourceCleanup.CLOSED_LIST) {
+                //ok now we're really closing down
+                ResourceCleanup prev = null;
+                while (true) {
+                    prev = (ResourceCleanup) FST.getVolatile(this);
+                    // no need to check for DUMMY, since only one thread can get here!
+                    if (FST.compareAndSet(this, prev, ResourceCleanup.CLOSED_LIST)) {
+                        break;
+                    }
+                }
+                cleanup(prev);
+            } else {
+                throw alreadyClosed();
+            }
+        }
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/foreign/SlicingAllocator.class b/tests/test_data/std/jdk/internal/foreign/SlicingAllocator.class
new file mode 100644
index 0000000000000000000000000000000000000000..5dcedbfd74e528463b11a638ccafe4befeed622e
GIT binary patch
literal 1139
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R0NENKTYY4X%M1<A{{UmQ@aq5o

literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/foreign/SlicingAllocator.java b/tests/test_data/std/jdk/internal/foreign/SlicingAllocator.java
new file mode 100644
index 00000000..db7d4760
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/foreign/SlicingAllocator.java
@@ -0,0 +1,55 @@
+/*
+ * Copyright (c) 2021, 2023, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package jdk.internal.foreign;
+
+import java.lang.foreign.MemorySegment;
+import java.lang.foreign.SegmentAllocator;
+
+public final class SlicingAllocator implements SegmentAllocator {
+
+    private final MemorySegment segment;
+
+    private long sp = 0L;
+
+    public SlicingAllocator(MemorySegment segment) {
+        this.segment = segment;
+    }
+
+    MemorySegment trySlice(long byteSize, long byteAlignment) {
+        long min = segment.address();
+        long start = Utils.alignUp(min + sp, byteAlignment) - min;
+        MemorySegment slice = segment.asSlice(start, byteSize, byteAlignment);
+        sp = start + byteSize;
+        return slice;
+    }
+
+    @Override
+    public MemorySegment allocate(long byteSize, long byteAlignment) {
+        Utils.checkAllocationSizeAndAlign(byteSize, byteAlignment);
+        // try to slice from current segment first...
+        return trySlice(byteSize, byteAlignment);
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/foreign/StringSupport$CharsetKind.class b/tests/test_data/std/jdk/internal/foreign/StringSupport$CharsetKind.class
new file mode 100644
index 0000000000000000000000000000000000000000..6dcf5a7f6cc96817d0db943b0bdf00f26118c257
GIT binary patch
literal 2527
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/foreign/StringSupport.class b/tests/test_data/std/jdk/internal/foreign/StringSupport.class
new file mode 100644
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/foreign/StringSupport.java b/tests/test_data/std/jdk/internal/foreign/StringSupport.java
new file mode 100644
index 00000000..b74d09be
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/foreign/StringSupport.java
@@ -0,0 +1,332 @@
+/*
+ * Copyright (c) 2023, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package jdk.internal.foreign;
+
+import jdk.internal.access.JavaLangAccess;
+import jdk.internal.access.SharedSecrets;
+import jdk.internal.foreign.abi.SharedUtils;
+import jdk.internal.util.ArraysSupport;
+import sun.security.action.GetPropertyAction;
+
+import java.lang.foreign.MemorySegment;
+import java.nio.charset.Charset;
+
+import static java.lang.foreign.ValueLayout.*;
+
+/**
+ * Miscellaneous functions to read and write strings, in various charsets.
+ */
+public final class StringSupport {
+
+    static final JavaLangAccess JAVA_LANG_ACCESS = SharedSecrets.getJavaLangAccess();
+
+    private StringSupport() {}
+
+    public static String read(MemorySegment segment, long offset, Charset charset) {
+        return switch (CharsetKind.of(charset)) {
+            case SINGLE_BYTE -> readByte(segment, offset, charset);
+            case DOUBLE_BYTE -> readShort(segment, offset, charset);
+            case QUAD_BYTE -> readInt(segment, offset, charset);
+        };
+    }
+
+    public static void write(MemorySegment segment, long offset, Charset charset, String string) {
+        switch (CharsetKind.of(charset)) {
+            case SINGLE_BYTE -> writeByte(segment, offset, charset, string);
+            case DOUBLE_BYTE -> writeShort(segment, offset, charset, string);
+            case QUAD_BYTE -> writeInt(segment, offset, charset, string);
+        }
+    }
+
+    private static String readByte(MemorySegment segment, long offset, Charset charset) {
+        long len = chunkedStrlenByte(segment, offset);
+        byte[] bytes = new byte[(int)len];
+        MemorySegment.copy(segment, JAVA_BYTE, offset, bytes, 0, (int)len);
+        return new String(bytes, charset);
+    }
+
+    private static void writeByte(MemorySegment segment, long offset, Charset charset, String string) {
+        int bytes = copyBytes(string, segment, charset, offset);
+        segment.set(JAVA_BYTE, offset + bytes, (byte)0);
+    }
+
+    private static String readShort(MemorySegment segment, long offset, Charset charset) {
+        long len = chunkedStrlenShort(segment, offset);
+        byte[] bytes = new byte[(int)len];
+        MemorySegment.copy(segment, JAVA_BYTE, offset, bytes, 0, (int)len);
+        return new String(bytes, charset);
+    }
+
+    private static void writeShort(MemorySegment segment, long offset, Charset charset, String string) {
+        int bytes = copyBytes(string, segment, charset, offset);
+        segment.set(JAVA_SHORT_UNALIGNED, offset + bytes, (short)0);
+    }
+
+    private static String readInt(MemorySegment segment, long offset, Charset charset) {
+        long len = strlenInt(segment, offset);
+        byte[] bytes = new byte[(int)len];
+        MemorySegment.copy(segment, JAVA_BYTE, offset, bytes, 0, (int)len);
+        return new String(bytes, charset);
+    }
+
+    private static void writeInt(MemorySegment segment, long offset, Charset charset, String string) {
+        int bytes = copyBytes(string, segment, charset, offset);
+        segment.set(JAVA_INT_UNALIGNED, offset + bytes, 0);
+    }
+
+    /**
+     * {@return the shortest distance beginning at the provided {@code start}
+     *  to the encountering of a zero byte in the provided {@code segment}}
+     * <p>
+     * The method divides the region of interest into three distinct regions:
+     * <ul>
+     *     <li>head (access made on a byte-by-byte basis) (if any)</li>
+     *     <li>body (access made with eight bytes at a time at physically 64-bit-aligned memory) (if any)</li>
+     *     <li>tail (access made on a byte-by-byte basis) (if any)</li>
+     * </ul>
+     * <p>
+     * The body is using a heuristic method to determine if a long word
+     * contains a zero byte. The method might have false positives but
+     * never false negatives.
+     * <p>
+     * This method is inspired by the `glibc/string/strlen.c` implementation
+     *
+     * @param segment to examine
+     * @param start   from where examination shall begin
+     * @throws IllegalArgumentException if the examined region contains no zero bytes
+     *                                  within a length that can be accepted by a String
+     */
+    public static int chunkedStrlenByte(MemorySegment segment, long start) {
+
+        // Handle the first unaligned "head" bytes separately
+        int headCount = (int)SharedUtils.remainsToAlignment(segment.address() + start, Long.BYTES);
+
+        int offset = 0;
+        for (; offset < headCount; offset++) {
+            byte curr = segment.get(JAVA_BYTE, start + offset);
+            if (curr == 0) {
+                return offset;
+            }
+        }
+
+        // We are now on a long-aligned boundary so this is the "body"
+        int bodyCount = bodyCount(segment.byteSize() - start - headCount);
+
+        for (; offset < bodyCount; offset += Long.BYTES) {
+            // We know we are `long` aligned so, we can save on alignment checking here
+            long curr = segment.get(JAVA_LONG_UNALIGNED, start + offset);
+            // Is this a candidate?
+            if (mightContainZeroByte(curr)) {
+                for (int j = 0; j < 8; j++) {
+                    if (segment.get(JAVA_BYTE, start + offset + j) == 0) {
+                        return offset + j;
+                    }
+                }
+            }
+        }
+
+        // Handle the "tail"
+        return requireWithinArraySize((long) offset + strlenByte(segment, start + offset));
+    }
+
+    /* Bits 63 and N * 8 (N = 1..7) of this number are zero.  Call these bits
+       the "holes".  Note that there is a hole just to the left of
+       each byte, with an extra at the end:
+
+       bits:  01111110 11111110 11111110 11111110 11111110 11111110 11111110 11111111
+       bytes: AAAAAAAA BBBBBBBB CCCCCCCC DDDDDDDD EEEEEEEE FFFFFFFF GGGGGGGG HHHHHHHH
+
+       The 1-bits make sure that carries propagate to the next 0-bit.
+       The 0-bits provide holes for carries to fall into.
+    */
+    private static final long HIMAGIC_FOR_BYTES = 0x8080_8080_8080_8080L;
+    private static final long LOMAGIC_FOR_BYTES = 0x0101_0101_0101_0101L;
+
+    static boolean mightContainZeroByte(long l) {
+        return ((l - LOMAGIC_FOR_BYTES) & (~l) & HIMAGIC_FOR_BYTES) != 0;
+    }
+
+    private static final long HIMAGIC_FOR_SHORTS = 0x8000_8000_8000_8000L;
+    private static final long LOMAGIC_FOR_SHORTS = 0x0001_0001_0001_0001L;
+
+    static boolean mightContainZeroShort(long l) {
+        return ((l - LOMAGIC_FOR_SHORTS) & (~l) & HIMAGIC_FOR_SHORTS) != 0;
+    }
+
+    static int requireWithinArraySize(long size) {
+        if (size > ArraysSupport.SOFT_MAX_ARRAY_LENGTH) {
+            throw newIaeStringTooLarge();
+        }
+        return (int) size;
+    }
+
+    static int bodyCount(long remaining) {
+        return (int) Math.min(
+                // Make sure we do not wrap around
+                Integer.MAX_VALUE - Long.BYTES,
+                // Remaining bytes to consider
+                remaining)
+                & -Long.BYTES; // Mask 0xFFFFFFF8
+    }
+
+    private static int strlenByte(MemorySegment segment, long start) {
+        for (int offset = 0; offset < ArraysSupport.SOFT_MAX_ARRAY_LENGTH; offset += 1) {
+            byte curr = segment.get(JAVA_BYTE, start + offset);
+            if (curr == 0) {
+                return offset;
+            }
+        }
+        throw newIaeStringTooLarge();
+    }
+
+    /**
+     * {@return the shortest distance beginning at the provided {@code start}
+     *  to the encountering of a zero short in the provided {@code segment}}
+     * <p>
+     * Note: The inspected region must be short aligned.
+     *
+     * @see #chunkedStrlenByte(MemorySegment, long) for more information
+     *
+     * @param segment to examine
+     * @param start   from where examination shall begin
+     * @throws IllegalArgumentException if the examined region contains no zero shorts
+     *                                  within a length that can be accepted by a String
+     */
+    public static int chunkedStrlenShort(MemorySegment segment, long start) {
+
+        // Handle the first unaligned "head" bytes separately
+        int headCount = (int)SharedUtils.remainsToAlignment(segment.address() + start, Long.BYTES);
+
+        int offset = 0;
+        for (; offset < headCount; offset += Short.BYTES) {
+            short curr = segment.get(JAVA_SHORT_UNALIGNED, start + offset);
+            if (curr == 0) {
+                return offset;
+            }
+        }
+
+        // We are now on a long-aligned boundary so this is the "body"
+        int bodyCount = bodyCount(segment.byteSize() - start - headCount);
+
+        for (; offset < bodyCount; offset += Long.BYTES) {
+            // We know we are `long` aligned so, we can save on alignment checking here
+            long curr = segment.get(JAVA_LONG_UNALIGNED, start + offset);
+            // Is this a candidate?
+            if (mightContainZeroShort(curr)) {
+                for (int j = 0; j < Long.BYTES; j += Short.BYTES) {
+                    if (segment.get(JAVA_SHORT_UNALIGNED, start + offset + j) == 0) {
+                        return offset + j;
+                    }
+                }
+            }
+        }
+
+        // Handle the "tail"
+        return requireWithinArraySize((long) offset + strlenShort(segment, start + offset));
+    }
+
+    private static int strlenShort(MemorySegment segment, long start) {
+        for (int offset = 0; offset < ArraysSupport.SOFT_MAX_ARRAY_LENGTH; offset += Short.BYTES) {
+            short curr = segment.get(JAVA_SHORT_UNALIGNED, start + offset);
+            if (curr == (short)0) {
+                return offset;
+            }
+        }
+        throw newIaeStringTooLarge();
+    }
+
+    // The gain of using `long` wide operations for `int` is lower than for the two other `byte` and `short` variants
+    // so, there is only one method for ints.
+    public static int strlenInt(MemorySegment segment, long start) {
+        for (int offset = 0; offset < ArraysSupport.SOFT_MAX_ARRAY_LENGTH; offset += Integer.BYTES) {
+            // We are guaranteed to be aligned here so, we can use unaligned access.
+            int curr = segment.get(JAVA_INT_UNALIGNED, start + offset);
+            if (curr == 0) {
+                return offset;
+            }
+        }
+        throw newIaeStringTooLarge();
+    }
+
+    public enum CharsetKind {
+        SINGLE_BYTE(1),
+        DOUBLE_BYTE(2),
+        QUAD_BYTE(4);
+
+        final int terminatorCharSize;
+
+        CharsetKind(int terminatorCharSize) {
+            this.terminatorCharSize = terminatorCharSize;
+        }
+
+        public int terminatorCharSize() {
+            return terminatorCharSize;
+        }
+
+        public static CharsetKind of(Charset charset) {
+            // Comparing the charset to specific internal implementations avoids loading the class `StandardCharsets`
+            if        (charset == sun.nio.cs.UTF_8.INSTANCE ||
+                       charset == sun.nio.cs.ISO_8859_1.INSTANCE ||
+                       charset == sun.nio.cs.US_ASCII.INSTANCE) {
+                return SINGLE_BYTE;
+            } else if (charset instanceof sun.nio.cs.UTF_16LE ||
+                       charset instanceof sun.nio.cs.UTF_16BE ||
+                       charset instanceof sun.nio.cs.UTF_16) {
+                return DOUBLE_BYTE;
+            } else if (charset instanceof sun.nio.cs.UTF_32LE ||
+                       charset instanceof sun.nio.cs.UTF_32BE ||
+                       charset instanceof sun.nio.cs.UTF_32) {
+                return QUAD_BYTE;
+            } else {
+                throw new IllegalArgumentException("Unsupported charset: " + charset);
+            }
+        }
+    }
+
+    public static boolean bytesCompatible(String string, Charset charset) {
+        return JAVA_LANG_ACCESS.bytesCompatible(string, charset);
+    }
+
+    public static int copyBytes(String string, MemorySegment segment, Charset charset, long offset) {
+        if (bytesCompatible(string, charset)) {
+            copyToSegmentRaw(string, segment, offset);
+            return string.length();
+        } else {
+            byte[] bytes = string.getBytes(charset);
+            MemorySegment.copy(bytes, 0, segment, JAVA_BYTE, offset, bytes.length);
+            return bytes.length;
+        }
+    }
+
+    public static void copyToSegmentRaw(String string, MemorySegment segment, long offset) {
+        JAVA_LANG_ACCESS.copyToSegmentRaw(string, segment, offset);
+    }
+
+    private static IllegalArgumentException newIaeStringTooLarge() {
+        return new IllegalArgumentException("String too large");
+    }
+
+}
diff --git a/tests/test_data/std/jdk/internal/foreign/SystemLookup$1.class b/tests/test_data/std/jdk/internal/foreign/SystemLookup$1.class
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GIT binary patch
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diff --git a/tests/test_data/std/jdk/internal/foreign/SystemLookup$2.class b/tests/test_data/std/jdk/internal/foreign/SystemLookup$2.class
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diff --git a/tests/test_data/std/jdk/internal/foreign/SystemLookup$WindowsFallbackSymbols.class b/tests/test_data/std/jdk/internal/foreign/SystemLookup$WindowsFallbackSymbols.class
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diff --git a/tests/test_data/std/jdk/internal/foreign/SystemLookup.class b/tests/test_data/std/jdk/internal/foreign/SystemLookup.class
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diff --git a/tests/test_data/std/jdk/internal/foreign/SystemLookup.java b/tests/test_data/std/jdk/internal/foreign/SystemLookup.java
new file mode 100644
index 00000000..98e02140
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/foreign/SystemLookup.java
@@ -0,0 +1,228 @@
+/*
+ * Copyright (c) 2021, 2024, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package jdk.internal.foreign;
+
+import java.lang.foreign.*;
+import java.lang.invoke.MethodHandles;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.security.AccessController;
+import java.security.PrivilegedAction;
+import java.util.Objects;
+import java.util.Optional;
+import java.util.function.Function;
+import jdk.internal.loader.NativeLibrary;
+import jdk.internal.loader.RawNativeLibraries;
+import sun.security.action.GetPropertyAction;
+
+import static java.lang.foreign.ValueLayout.ADDRESS;
+
+public final class SystemLookup implements SymbolLookup {
+
+    private SystemLookup() { }
+
+    private static final SystemLookup INSTANCE = new SystemLookup();
+
+    /* A fallback lookup, used when creation of system lookup fails. */
+    private static final SymbolLookup FALLBACK_LOOKUP = name -> {
+        Objects.requireNonNull(name);
+        return Optional.empty();
+    };
+
+    /*
+     * On POSIX systems, dlsym will allow us to lookup symbol in library dependencies; the same trick doesn't work
+     * on Windows. For this reason, on Windows we do not generate any side-library, and load msvcrt.dll directly instead.
+     */
+    private static final SymbolLookup SYSTEM_LOOKUP = makeSystemLookup();
+
+    private static SymbolLookup makeSystemLookup() {
+        try {
+            if (Utils.IS_WINDOWS) {
+                return makeWindowsLookup();
+            } else {
+                return libLookup(libs -> libs.load(jdkLibraryPath("syslookup")));
+            }
+        } catch (Throwable ex) {
+            // This can happen in the event of a library loading failure - e.g. if one of the libraries the
+            // system lookup depends on cannot be loaded for some reason. In such extreme cases, rather than
+            // fail, return a dummy lookup.
+            return FALLBACK_LOOKUP;
+        }
+    }
+
+    private static SymbolLookup makeWindowsLookup() {
+        @SuppressWarnings("removal")
+        String systemRoot = AccessController.doPrivileged(new PrivilegedAction<>() {
+            @Override
+            public String run() {
+                return System.getenv("SystemRoot");
+            }
+        });
+        Path system32 = Path.of(systemRoot, "System32");
+        Path ucrtbase = system32.resolve("ucrtbase.dll");
+        Path msvcrt = system32.resolve("msvcrt.dll");
+
+        @SuppressWarnings("removal")
+        boolean useUCRT = AccessController.doPrivileged(new PrivilegedAction<>() {
+            @Override
+            public Boolean run() {
+                return Files.exists(ucrtbase);
+            }
+        });
+        Path stdLib = useUCRT ? ucrtbase : msvcrt;
+        SymbolLookup lookup = libLookup(libs -> libs.load(stdLib));
+
+        if (useUCRT) {
+            // use a fallback lookup to look up inline functions from fallback lib
+
+            SymbolLookup fallbackLibLookup =
+                    libLookup(libs -> libs.load(jdkLibraryPath("syslookup")));
+
+            @SuppressWarnings("restricted")
+            MemorySegment funcs = fallbackLibLookup.findOrThrow("funcs")
+                    .reinterpret(WindowsFallbackSymbols.LAYOUT.byteSize());
+
+            Function<String, Optional<MemorySegment>> fallbackLookup = name -> Optional.ofNullable(WindowsFallbackSymbols.valueOfOrNull(name))
+                .map(symbol -> funcs.getAtIndex(ADDRESS, symbol.ordinal()));
+
+            final SymbolLookup finalLookup = lookup;
+            lookup = name -> {
+                Objects.requireNonNull(name);
+                if (Utils.containsNullChars(name)) return Optional.empty();
+                return finalLookup.find(name).or(() -> fallbackLookup.apply(name));
+            };
+        }
+
+        return lookup;
+    }
+
+    private static SymbolLookup libLookup(Function<RawNativeLibraries, NativeLibrary> loader) {
+        NativeLibrary lib = loader.apply(RawNativeLibraries.newInstance(MethodHandles.lookup()));
+        return name -> {
+            Objects.requireNonNull(name);
+            if (Utils.containsNullChars(name)) return Optional.empty();
+            try {
+                long addr = lib.lookup(name);
+                return addr == 0 ?
+                        Optional.empty() :
+                        Optional.of(MemorySegment.ofAddress(addr));
+            } catch (NoSuchMethodException e) {
+                return Optional.empty();
+            }
+        };
+    }
+
+    /*
+     * Returns the path of the given library name from JDK
+     */
+    private static Path jdkLibraryPath(String name) {
+        Path javahome = Path.of(GetPropertyAction.privilegedGetProperty("java.home"));
+        String lib = Utils.IS_WINDOWS ? "bin" : "lib";
+        String libname = System.mapLibraryName(name);
+        return javahome.resolve(lib).resolve(libname);
+    }
+
+
+    public static SystemLookup getInstance() {
+        return INSTANCE;
+    }
+
+    @Override
+    public Optional<MemorySegment> find(String name) {
+        return SYSTEM_LOOKUP.find(name);
+    }
+
+    // fallback symbols missing from ucrtbase.dll
+    // this list has to be kept in sync with the table in the companion native library
+    private enum WindowsFallbackSymbols {
+        // stdio
+        fprintf,
+        fprintf_s,
+        fscanf,
+        fscanf_s,
+        fwprintf,
+        fwprintf_s,
+        fwscanf,
+        fwscanf_s,
+        printf,
+        printf_s,
+        scanf,
+        scanf_s,
+        snprintf,
+        sprintf,
+        sprintf_s,
+        sscanf,
+        sscanf_s,
+        swprintf,
+        swprintf_s,
+        swscanf,
+        swscanf_s,
+        vfprintf,
+        vfprintf_s,
+        vfscanf,
+        vfscanf_s,
+        vfwprintf,
+        vfwprintf_s,
+        vfwscanf,
+        vfwscanf_s,
+        vprintf,
+        vprintf_s,
+        vscanf,
+        vscanf_s,
+        vsnprintf,
+        vsnprintf_s,
+        vsprintf,
+        vsprintf_s,
+        vsscanf,
+        vsscanf_s,
+        vswprintf,
+        vswprintf_s,
+        vswscanf,
+        vswscanf_s,
+        vwprintf,
+        vwprintf_s,
+        vwscanf,
+        vwscanf_s,
+        wprintf,
+        wprintf_s,
+        wscanf,
+        wscanf_s,
+
+        // time
+        gmtime;
+
+        static WindowsFallbackSymbols valueOfOrNull(String name) {
+            try {
+                return valueOf(name);
+            } catch (IllegalArgumentException e) {
+                return null;
+            }
+        }
+
+        static final SequenceLayout LAYOUT = MemoryLayout.sequenceLayout(
+                values().length, ADDRESS);
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/foreign/Utils$1VarHandleCache.class b/tests/test_data/std/jdk/internal/foreign/Utils$1VarHandleCache.class
new file mode 100644
index 0000000000000000000000000000000000000000..0dd837019ef40a5c9541b5096b2b091ab94e81ad
GIT binary patch
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literal 0
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diff --git a/tests/test_data/std/jdk/internal/foreign/Utils$BaseAndScale.class b/tests/test_data/std/jdk/internal/foreign/Utils$BaseAndScale.class
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diff --git a/tests/test_data/std/jdk/internal/foreign/Utils.class b/tests/test_data/std/jdk/internal/foreign/Utils.class
new file mode 100644
index 0000000000000000000000000000000000000000..b471d734b734c2d0e5d8eaf41243612439aae52a
GIT binary patch
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diff --git a/tests/test_data/std/jdk/internal/foreign/Utils.java b/tests/test_data/std/jdk/internal/foreign/Utils.java
new file mode 100644
index 00000000..2ed65e3d
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/foreign/Utils.java
@@ -0,0 +1,325 @@
+/*
+ *  Copyright (c) 2019, 2024, Oracle and/or its affiliates. All rights reserved.
+ *  DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ *  This code is free software; you can redistribute it and/or modify it
+ *  under the terms of the GNU General Public License version 2 only, as
+ *  published by the Free Software Foundation.  Oracle designates this
+ *  particular file as subject to the "Classpath" exception as provided
+ *  by Oracle in the LICENSE file that accompanied this code.
+ *
+ *  This code is distributed in the hope that it will be useful, but WITHOUT
+ *  ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ *  FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ *  version 2 for more details (a copy is included in the LICENSE file that
+ *  accompanied this code).
+ *
+ *  You should have received a copy of the GNU General Public License version
+ *  2 along with this work; if not, write to the Free Software Foundation,
+ *  Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ *   Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ *  or visit www.oracle.com if you need additional information or have any
+ *  questions.
+ *
+ */
+
+package jdk.internal.foreign;
+
+import java.lang.foreign.AddressLayout;
+import java.lang.foreign.MemoryLayout;
+import java.lang.foreign.MemoryLayout.PathElement;
+import java.lang.foreign.MemorySegment;
+import java.lang.foreign.StructLayout;
+import java.lang.foreign.ValueLayout;
+import java.lang.invoke.MethodHandle;
+import java.lang.invoke.MethodHandles;
+import java.lang.invoke.MethodType;
+import java.lang.invoke.VarHandle;
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Map;
+import java.util.concurrent.ConcurrentHashMap;
+import java.util.function.Supplier;
+
+import jdk.internal.access.SharedSecrets;
+import jdk.internal.foreign.abi.SharedUtils;
+import jdk.internal.misc.Unsafe;
+import jdk.internal.vm.annotation.ForceInline;
+import sun.invoke.util.Wrapper;
+
+import static sun.security.action.GetPropertyAction.privilegedGetProperty;
+
+/**
+ * This class contains misc helper functions to support creation of memory segments.
+ */
+public final class Utils {
+
+    public static final boolean IS_WINDOWS = privilegedGetProperty("os.name").startsWith("Windows");
+
+    // Suppresses default constructor, ensuring non-instantiability.
+    private Utils() {}
+
+    private static final MethodHandle BYTE_TO_BOOL;
+    private static final MethodHandle BOOL_TO_BYTE;
+    private static final MethodHandle ADDRESS_TO_LONG;
+    private static final MethodHandle LONG_TO_ADDRESS;
+
+    static {
+        try {
+            MethodHandles.Lookup lookup = MethodHandles.lookup();
+            BYTE_TO_BOOL = lookup.findStatic(Utils.class, "byteToBoolean",
+                    MethodType.methodType(boolean.class, byte.class));
+            BOOL_TO_BYTE = lookup.findStatic(Utils.class, "booleanToByte",
+                    MethodType.methodType(byte.class, boolean.class));
+            ADDRESS_TO_LONG = lookup.findStatic(SharedUtils.class, "unboxSegment",
+                    MethodType.methodType(long.class, MemorySegment.class));
+            LONG_TO_ADDRESS = lookup.findStatic(Utils.class, "longToAddress",
+                    MethodType.methodType(MemorySegment.class, long.class, long.class, long.class));
+        } catch (Throwable ex) {
+            throw new ExceptionInInitializerError(ex);
+        }
+    }
+
+    public static long alignUp(long n, long alignment) {
+        return (n + alignment - 1) & -alignment;
+    }
+
+    public static MemorySegment alignUp(MemorySegment ms, long alignment) {
+        long offset = ms.address();
+        return ms.asSlice(alignUp(offset, alignment) - offset);
+    }
+
+    /**
+     * This method returns a <em>raw var handle</em>, that is, a var handle that does not perform any size
+     * or alignment checks. Such checks are added (using adaptation) by {@link LayoutPath#dereferenceHandle()}.
+     * <p>
+     * We provide two level of caching of the generated var handles. First, the var handle associated
+     * with a {@link ValueLayout#varHandle()} call is cached inside a stable field of the value layout implementation.
+     * This optimizes common code idioms like {@code JAVA_INT.varHandle().getInt(...)}. A second layer of caching
+     * is then provided by this method: after all, var handles constructed by {@link MemoryLayout#varHandle(PathElement...)}
+     * will be obtained by adapting some raw var handle generated by this method.
+     *
+     * @param layout the value layout for which a raw memory segment var handle is to be created.
+     * @return a raw memory segment var handle.
+     */
+    public static VarHandle makeRawSegmentViewVarHandle(ValueLayout layout) {
+        final class VarHandleCache {
+            private static final Map<ValueLayout, VarHandle> HANDLE_MAP = new ConcurrentHashMap<>();
+        }
+        return VarHandleCache.HANDLE_MAP
+                .computeIfAbsent(layout.withoutName(), Utils::makeRawSegmentViewVarHandleInternal);
+    }
+
+    private static VarHandle makeRawSegmentViewVarHandleInternal(ValueLayout layout) {
+        Class<?> baseCarrier = layout.carrier();
+        if (layout.carrier() == MemorySegment.class) {
+            baseCarrier = switch ((int) ValueLayout.ADDRESS.byteSize()) {
+                case Long.BYTES -> long.class;
+                case Integer.BYTES -> int.class;
+                default -> throw new UnsupportedOperationException("Unsupported address layout");
+            };
+        } else if (layout.carrier() == boolean.class) {
+            baseCarrier = byte.class;
+        }
+
+        VarHandle handle = SharedSecrets.getJavaLangInvokeAccess().memorySegmentViewHandle(baseCarrier,
+                layout.byteAlignment() - 1, layout.order());
+
+        if (layout.carrier() == boolean.class) {
+            handle = MethodHandles.filterValue(handle, BOOL_TO_BYTE, BYTE_TO_BOOL);
+        } else if (layout instanceof AddressLayout addressLayout) {
+            handle = MethodHandles.filterValue(handle,
+                    MethodHandles.explicitCastArguments(ADDRESS_TO_LONG, MethodType.methodType(baseCarrier, MemorySegment.class)),
+                    MethodHandles.explicitCastArguments(MethodHandles.insertArguments(LONG_TO_ADDRESS, 1,
+                                    pointeeByteSize(addressLayout), pointeeByteAlign(addressLayout)),
+                            MethodType.methodType(MemorySegment.class, baseCarrier)));
+        }
+        return handle;
+    }
+
+    public static boolean byteToBoolean(byte b) {
+        return b != 0;
+    }
+
+    private static byte booleanToByte(boolean b) {
+        return b ? (byte)1 : (byte)0;
+    }
+
+    @ForceInline
+    public static MemorySegment longToAddress(long addr, long size, long align) {
+        if (!isAligned(addr, align)) {
+            throw new IllegalArgumentException("Invalid alignment constraint for address: " + toHexString(addr));
+        }
+        return SegmentFactories.makeNativeSegmentUnchecked(addr, size);
+    }
+
+    @ForceInline
+    public static MemorySegment longToAddress(long addr, long size, long align, MemorySessionImpl scope) {
+        if (!isAligned(addr, align)) {
+            throw new IllegalArgumentException("Invalid alignment constraint for address: " + toHexString(addr));
+        }
+        return SegmentFactories.makeNativeSegmentUnchecked(addr, size, scope);
+    }
+
+    @ForceInline
+    public static boolean isAligned(long offset, long align) {
+        return (offset & (align - 1)) == 0;
+    }
+
+    @ForceInline
+    public static boolean isElementAligned(ValueLayout layout) {
+        // Fast-path: if both size and alignment are powers of two, we can just
+        // check if one is greater than the other.
+        assert isPowerOfTwo(layout.byteSize());
+        return layout.byteAlignment() <= layout.byteSize();
+    }
+
+    @ForceInline
+    public static void checkElementAlignment(ValueLayout layout, String msg) {
+        if (!isElementAligned(layout)) {
+            throw new IllegalArgumentException(msg);
+        }
+    }
+
+    @ForceInline
+    public static void checkElementAlignment(MemoryLayout layout, String msg) {
+        if (layout.byteSize() % layout.byteAlignment() != 0) {
+            throw new IllegalArgumentException(msg);
+        }
+    }
+
+    public static long pointeeByteSize(AddressLayout addressLayout) {
+        return addressLayout.targetLayout()
+                .map(MemoryLayout::byteSize)
+                .orElse(0L);
+    }
+
+    public static long pointeeByteAlign(AddressLayout addressLayout) {
+        return addressLayout.targetLayout()
+                .map(MemoryLayout::byteAlignment)
+                .orElse(1L);
+    }
+
+    public static void checkAllocationSizeAndAlign(long byteSize, long byteAlignment) {
+        // byteSize should be >= 0
+        Utils.checkNonNegativeArgument(byteSize, "allocation size");
+        checkAlign(byteAlignment);
+    }
+
+    public static void checkAlign(long byteAlignment) {
+        // alignment should be > 0, and power of two
+        if (byteAlignment <= 0 ||
+                ((byteAlignment & (byteAlignment - 1)) != 0L)) {
+            throw new IllegalArgumentException("Invalid alignment constraint : " + byteAlignment);
+        }
+    }
+
+    @ForceInline
+    public static void checkNonNegativeArgument(long value, String name) {
+        if (value < 0) {
+            throw new IllegalArgumentException("The provided " + name + " is negative: " + value);
+        }
+    }
+
+    @ForceInline
+    public static void checkNonNegativeIndex(long value, String name) {
+        if (value < 0) {
+            throw new IndexOutOfBoundsException("The provided " + name + " is negative: " + value);
+        }
+    }
+
+    private static long computePadding(long offset, long align) {
+        boolean isAligned = offset == 0 || offset % align == 0;
+        if (isAligned) {
+            return 0;
+        } else {
+            long gap = offset % align;
+            return align - gap;
+        }
+    }
+
+    /**
+     * {@return return a struct layout constructed from the given elements, with padding
+     * computed automatically so that they are naturally aligned}.
+     *
+     * @param elements the structs' fields
+     */
+    public static StructLayout computePaddedStructLayout(MemoryLayout... elements) {
+        long offset = 0L;
+        List<MemoryLayout> layouts = new ArrayList<>();
+        long align = 0;
+        for (MemoryLayout l : elements) {
+            long padding = computePadding(offset, l.byteAlignment());
+            if (padding != 0) {
+                layouts.add(MemoryLayout.paddingLayout(padding));
+                offset += padding;
+            }
+            layouts.add(l);
+            align = Math.max(align, l.byteAlignment());
+            offset += l.byteSize();
+        }
+        long padding = computePadding(offset, align);
+        if (padding != 0) {
+            layouts.add(MemoryLayout.paddingLayout(padding));
+        }
+        return MemoryLayout.structLayout(layouts.toArray(MemoryLayout[]::new));
+    }
+
+    public static int byteWidthOfPrimitive(Class<?> primitive) {
+        return Wrapper.forPrimitiveType(primitive).bitWidth() / 8;
+    }
+
+    public static boolean isPowerOfTwo(long value) {
+        return (value & (value - 1)) == 0L;
+    }
+
+    public static <L extends MemoryLayout> L wrapOverflow(Supplier<L> layoutSupplier) {
+        try {
+            return layoutSupplier.get();
+        } catch (ArithmeticException ex) {
+            throw new IllegalArgumentException("Layout size exceeds Long.MAX_VALUE");
+        }
+    }
+
+    public static boolean containsNullChars(String s) {
+        return s.indexOf('\u0000') >= 0;
+    }
+
+    public static String toHexString(long value) {
+        return "0x" + Long.toHexString(value);
+    }
+
+    public record BaseAndScale(int base, long scale) {
+
+        public static final BaseAndScale BYTE =
+                new BaseAndScale(Unsafe.ARRAY_BYTE_BASE_OFFSET, Unsafe.ARRAY_BYTE_INDEX_SCALE);
+        public static final BaseAndScale CHAR =
+                new BaseAndScale(Unsafe.ARRAY_CHAR_BASE_OFFSET, Unsafe.ARRAY_CHAR_INDEX_SCALE);
+        public static final BaseAndScale SHORT =
+                new BaseAndScale(Unsafe.ARRAY_SHORT_BASE_OFFSET, Unsafe.ARRAY_SHORT_INDEX_SCALE);
+        public static final BaseAndScale INT =
+                new BaseAndScale(Unsafe.ARRAY_INT_BASE_OFFSET, Unsafe.ARRAY_INT_INDEX_SCALE);
+        public static final BaseAndScale FLOAT =
+                new BaseAndScale(Unsafe.ARRAY_FLOAT_BASE_OFFSET, Unsafe.ARRAY_FLOAT_INDEX_SCALE);
+        public static final BaseAndScale LONG =
+                new BaseAndScale(Unsafe.ARRAY_LONG_BASE_OFFSET, Unsafe.ARRAY_LONG_INDEX_SCALE);
+        public static final BaseAndScale DOUBLE =
+                new BaseAndScale(Unsafe.ARRAY_DOUBLE_BASE_OFFSET, Unsafe.ARRAY_DOUBLE_INDEX_SCALE);
+
+        public static BaseAndScale of(Object array) {
+            return switch (array) {
+                case byte[]   _ -> BaseAndScale.BYTE;
+                case char[]   _ -> BaseAndScale.CHAR;
+                case short[]  _ -> BaseAndScale.SHORT;
+                case int[]    _ -> BaseAndScale.INT;
+                case float[]  _ -> BaseAndScale.FLOAT;
+                case long[]   _ -> BaseAndScale.LONG;
+                case double[] _ -> BaseAndScale.DOUBLE;
+                default -> throw new IllegalArgumentException("Not a supported array class: " + array.getClass().getSimpleName());
+            };
+        }
+
+    }
+
+}
diff --git a/tests/test_data/std/jdk/internal/foreign/abi/ABIDescriptor.class b/tests/test_data/std/jdk/internal/foreign/abi/ABIDescriptor.class
new file mode 100644
index 0000000000000000000000000000000000000000..ed0bd631540535545523c803c45ae0ee29f5765e
GIT binary patch
literal 1596
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z2Y-M+%6Mj4LnW=@!3SUFoSAc-Z_YPAet!E7U>BPyj9@g52uBn#hRm@z6IN4rb?a^Q
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zctIX7X;+{RuSk2~W49ly<00*+GmQh&nnFUMv!^}}jA~7x5z(5$BdRrpNK9)AlepFt
zDhaJAT#{N-$fUHUut^gpOL){phR~sJg=|st3l=_+(!E+tAHLG9@~%U#RYt5I6r8;n
VTpAd>GB7xQG5BC$@MGQI#xE6jV+jBN

literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/foreign/abi/ABIDescriptor.java b/tests/test_data/std/jdk/internal/foreign/abi/ABIDescriptor.java
new file mode 100644
index 00000000..b25280ed
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/foreign/abi/ABIDescriptor.java
@@ -0,0 +1,79 @@
+/*
+ * Copyright (c) 2020, 2022, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package jdk.internal.foreign.abi;
+
+/**
+ * Carrier class used to communicate with the VM
+ *
+ * It is particularly low-level since the VM will be accessing these fields directly
+ */
+public class ABIDescriptor {
+    final Architecture arch;
+
+    public final VMStorage[][] inputStorage;
+    public final VMStorage[][] outputStorage;
+
+    final VMStorage[][] volatileStorage;
+
+    final int stackAlignment;
+    final int shadowSpace;
+
+    final VMStorage scratch1;
+    final VMStorage scratch2;
+
+    final VMStorage targetAddrStorage;
+    final VMStorage retBufAddrStorage;
+    final VMStorage capturedStateStorage;
+
+    public ABIDescriptor(Architecture arch, VMStorage[][] inputStorage, VMStorage[][] outputStorage,
+                         VMStorage[][] volatileStorage, int stackAlignment, int shadowSpace,
+                         VMStorage scratch1, VMStorage scratch2,
+                         VMStorage targetAddrStorage, VMStorage retBufAddrStorage,
+                         VMStorage capturedStateStorage) {
+        this.arch = arch;
+        this.inputStorage = inputStorage;
+        this.outputStorage = outputStorage;
+        this.volatileStorage = volatileStorage;
+        this.stackAlignment = stackAlignment;
+        this.shadowSpace = shadowSpace;
+        this.scratch1 = scratch1;
+        this.scratch2 = scratch2;
+        this.targetAddrStorage = targetAddrStorage;
+        this.retBufAddrStorage = retBufAddrStorage;
+        this.capturedStateStorage = capturedStateStorage;
+    }
+
+    public VMStorage targetAddrStorage() {
+        return targetAddrStorage;
+    }
+
+    public VMStorage retBufAddrStorage() {
+        return retBufAddrStorage;
+    }
+
+    public VMStorage capturedStateStorage() {
+        return capturedStateStorage;
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/foreign/abi/AbstractLinker$LinkRequest.class b/tests/test_data/std/jdk/internal/foreign/abi/AbstractLinker$LinkRequest.class
new file mode 100644
index 0000000000000000000000000000000000000000..a1d0bc0423da0e943d8ccb6a14d66023ae84acd5
GIT binary patch
literal 1941
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/foreign/abi/AbstractLinker$UpcallStubFactory.class b/tests/test_data/std/jdk/internal/foreign/abi/AbstractLinker$UpcallStubFactory.class
new file mode 100644
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GIT binary patch
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/foreign/abi/AbstractLinker.class b/tests/test_data/std/jdk/internal/foreign/abi/AbstractLinker.class
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diff --git a/tests/test_data/std/jdk/internal/foreign/abi/AbstractLinker.java b/tests/test_data/std/jdk/internal/foreign/abi/AbstractLinker.java
new file mode 100644
index 00000000..4f3baaa0
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/foreign/abi/AbstractLinker.java
@@ -0,0 +1,282 @@
+/*
+ * Copyright (c) 2022, 2024, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package jdk.internal.foreign.abi;
+
+import jdk.internal.foreign.SystemLookup;
+import jdk.internal.foreign.Utils;
+import jdk.internal.foreign.abi.aarch64.linux.LinuxAArch64Linker;
+import jdk.internal.foreign.abi.aarch64.macos.MacOsAArch64Linker;
+import jdk.internal.foreign.abi.aarch64.windows.WindowsAArch64Linker;
+import jdk.internal.foreign.abi.fallback.FallbackLinker;
+import jdk.internal.foreign.abi.ppc64.aix.AixPPC64Linker;
+import jdk.internal.foreign.abi.ppc64.linux.LinuxPPC64Linker;
+import jdk.internal.foreign.abi.ppc64.linux.LinuxPPC64leLinker;
+import jdk.internal.foreign.abi.riscv64.linux.LinuxRISCV64Linker;
+import jdk.internal.foreign.abi.s390.linux.LinuxS390Linker;
+import jdk.internal.foreign.abi.x64.sysv.SysVx64Linker;
+import jdk.internal.foreign.abi.x64.windows.Windowsx64Linker;
+import jdk.internal.foreign.layout.AbstractLayout;
+import jdk.internal.reflect.CallerSensitive;
+import jdk.internal.reflect.Reflection;
+
+import java.lang.foreign.AddressLayout;
+import java.lang.foreign.GroupLayout;
+import java.lang.foreign.MemoryLayout;
+import java.lang.foreign.Arena;
+import java.lang.foreign.FunctionDescriptor;
+import java.lang.foreign.Linker;
+import java.lang.foreign.MemorySegment;
+import java.lang.foreign.PaddingLayout;
+import java.lang.foreign.SequenceLayout;
+import java.lang.foreign.StructLayout;
+import java.lang.foreign.UnionLayout;
+import java.lang.foreign.ValueLayout;
+import java.lang.invoke.MethodHandle;
+import java.lang.invoke.MethodType;
+import java.util.HashSet;
+import java.util.List;
+import java.nio.ByteOrder;
+import java.util.Objects;
+import java.util.Set;
+
+public abstract sealed class AbstractLinker implements Linker permits LinuxAArch64Linker, MacOsAArch64Linker,
+                                                                      SysVx64Linker, WindowsAArch64Linker,
+                                                                      Windowsx64Linker, AixPPC64Linker,
+                                                                      LinuxPPC64Linker, LinuxPPC64leLinker,
+                                                                      LinuxRISCV64Linker, LinuxS390Linker,
+                                                                      FallbackLinker {
+
+    public interface UpcallStubFactory {
+        MemorySegment makeStub(MethodHandle target, Arena arena);
+    }
+
+    private record LinkRequest(FunctionDescriptor descriptor, LinkerOptions options) {}
+    private final SoftReferenceCache<LinkRequest, MethodHandle> DOWNCALL_CACHE = new SoftReferenceCache<>();
+    private final SoftReferenceCache<LinkRequest, UpcallStubFactory> UPCALL_CACHE = new SoftReferenceCache<>();
+    private final Set<MemoryLayout> CANONICAL_LAYOUTS_CACHE = new HashSet<>(canonicalLayouts().values());
+
+    @Override
+    @CallerSensitive
+    public final MethodHandle downcallHandle(MemorySegment symbol, FunctionDescriptor function, Option... options) {
+        Reflection.ensureNativeAccess(Reflection.getCallerClass(), Linker.class, "downcallHandle");
+        SharedUtils.checkSymbol(symbol);
+        return downcallHandle0(function, options).bindTo(symbol);
+    }
+
+    @Override
+    @CallerSensitive
+    public final MethodHandle downcallHandle(FunctionDescriptor function, Option... options) {
+        Reflection.ensureNativeAccess(Reflection.getCallerClass(), Linker.class, "downcallHandle");
+        return downcallHandle0(function, options);
+    }
+
+    private MethodHandle downcallHandle0(FunctionDescriptor function, Option... options) {
+        Objects.requireNonNull(function);
+        Objects.requireNonNull(options);
+        checkLayouts(function);
+        function = stripNames(function);
+        LinkerOptions optionSet = LinkerOptions.forDowncall(function, options);
+        validateVariadicLayouts(function, optionSet);
+
+        return DOWNCALL_CACHE.get(new LinkRequest(function, optionSet), linkRequest ->  {
+            FunctionDescriptor fd = linkRequest.descriptor();
+            MethodType type = fd.toMethodType();
+            MethodHandle handle = arrangeDowncall(type, fd, linkRequest.options());
+            handle = SharedUtils.maybeCheckCaptureSegment(handle, linkRequest.options());
+            handle = SharedUtils.maybeInsertAllocator(fd, handle);
+            return handle;
+        });
+    }
+
+    protected abstract MethodHandle arrangeDowncall(MethodType inferredMethodType, FunctionDescriptor function, LinkerOptions options);
+
+    @Override
+    @CallerSensitive
+    public final MemorySegment upcallStub(MethodHandle target, FunctionDescriptor function, Arena arena, Linker.Option... options) {
+        Reflection.ensureNativeAccess(Reflection.getCallerClass(), Linker.class, "upcallStub");
+        Objects.requireNonNull(arena);
+        Objects.requireNonNull(target);
+        Objects.requireNonNull(function);
+        checkLayouts(function);
+        SharedUtils.checkExceptions(target);
+        function = stripNames(function);
+        LinkerOptions optionSet = LinkerOptions.forUpcall(function, options);
+
+        MethodType type = function.toMethodType();
+        if (!type.equals(target.type())) {
+            throw new IllegalArgumentException("Wrong method handle type: " + target.type());
+        }
+
+        UpcallStubFactory factory = UPCALL_CACHE.get(new LinkRequest(function, optionSet), linkRequest ->
+            arrangeUpcall(type, linkRequest.descriptor(), linkRequest.options()));
+        return factory.makeStub(target, arena);
+    }
+
+    protected abstract UpcallStubFactory arrangeUpcall(MethodType targetType, FunctionDescriptor function, LinkerOptions options);
+
+    @Override
+    public SystemLookup defaultLookup() {
+        return SystemLookup.getInstance();
+    }
+
+    // C spec mandates that variadic arguments smaller than int are promoted to int,
+    // and float is promoted to double
+    // See: https://en.cppreference.com/w/c/language/conversion#Default_argument_promotions
+    // We reject the corresponding layouts here, to avoid issues where unsigned values
+    // are sign extended when promoted. (as we don't have a way to unambiguously represent signed-ness atm).
+    private void validateVariadicLayouts(FunctionDescriptor function, LinkerOptions optionSet) {
+        if (optionSet.isVariadicFunction()) {
+            List<MemoryLayout> argumentLayouts = function.argumentLayouts();
+            List<MemoryLayout> variadicLayouts = argumentLayouts.subList(optionSet.firstVariadicArgIndex(), argumentLayouts.size());
+
+            for (MemoryLayout variadicLayout : variadicLayouts) {
+                if (variadicLayout.equals(ValueLayout.JAVA_BOOLEAN)
+                    || variadicLayout.equals(ValueLayout.JAVA_BYTE)
+                    || variadicLayout.equals(ValueLayout.JAVA_CHAR)
+                    || variadicLayout.equals(ValueLayout.JAVA_SHORT)
+                    || variadicLayout.equals(ValueLayout.JAVA_FLOAT)) {
+                    throw new IllegalArgumentException("Invalid variadic argument layout: " + variadicLayout);
+                }
+            }
+        }
+    }
+
+    private void checkLayouts(FunctionDescriptor descriptor) {
+        descriptor.returnLayout().ifPresent(this::checkLayout);
+        descriptor.argumentLayouts().forEach(this::checkLayout);
+    }
+
+    private void checkLayout(MemoryLayout layout) {
+        // Note: we should not worry about padding layouts, as they cannot be present in a function descriptor
+        if (layout instanceof SequenceLayout) {
+            throw new IllegalArgumentException("Unsupported layout: " + layout);
+        } else {
+            checkLayoutRecursive(layout);
+        }
+    }
+
+    // some ABIs have special handling for struct members
+    protected void checkStructMember(MemoryLayout member, long offset) {
+        checkLayoutRecursive(member);
+    }
+
+    private void checkLayoutRecursive(MemoryLayout layout) {
+        if (layout instanceof ValueLayout vl) {
+            checkSupported(vl);
+        } else if (layout instanceof StructLayout sl) {
+            checkHasNaturalAlignment(layout);
+            long offset = 0;
+            long lastUnpaddedOffset = 0;
+            for (MemoryLayout member : sl.memberLayouts()) {
+                // check element offset before recursing so that an error points at the
+                // outermost layout first
+                checkMemberOffset(sl, member, lastUnpaddedOffset, offset);
+                checkStructMember(member, offset);
+
+                offset += member.byteSize();
+                if (!(member instanceof PaddingLayout)) {
+                    lastUnpaddedOffset = offset;
+                }
+            }
+            checkGroupSize(sl, lastUnpaddedOffset);
+        } else if (layout instanceof UnionLayout ul) {
+            checkHasNaturalAlignment(layout);
+            long maxUnpaddedLayout = 0;
+            for (MemoryLayout member : ul.memberLayouts()) {
+                checkLayoutRecursive(member);
+                if (!(member instanceof PaddingLayout)) {
+                    maxUnpaddedLayout = Long.max(maxUnpaddedLayout, member.byteSize());
+                }
+            }
+            checkGroupSize(ul, maxUnpaddedLayout);
+        } else if (layout instanceof SequenceLayout sl) {
+            checkHasNaturalAlignment(layout);
+            checkLayoutRecursive(sl.elementLayout());
+        }
+    }
+
+    // check for trailing padding
+    private void checkGroupSize(GroupLayout gl, long maxUnpaddedOffset) {
+        long expectedSize = Utils.alignUp(maxUnpaddedOffset, gl.byteAlignment());
+        if (gl.byteSize() != expectedSize) {
+            throw new IllegalArgumentException("Layout '" + gl + "' has unexpected size: "
+                    + gl.byteSize() + " != " + expectedSize);
+        }
+    }
+
+    // checks both that there is no excess padding between 'memberLayout' and
+    // the previous layout
+    private void checkMemberOffset(StructLayout parent, MemoryLayout memberLayout,
+                                          long lastUnpaddedOffset, long offset) {
+        long expectedOffset = Utils.alignUp(lastUnpaddedOffset, memberLayout.byteAlignment());
+        if (expectedOffset != offset) {
+            throw new IllegalArgumentException("Member layout '" + memberLayout + "', of '" + parent + "'" +
+                    " found at unexpected offset: " + offset + " != " + expectedOffset);
+        }
+    }
+
+    private void checkSupported(ValueLayout valueLayout) {
+        valueLayout = valueLayout.withoutName();
+        if (valueLayout instanceof AddressLayout addressLayout) {
+            valueLayout = addressLayout.withoutTargetLayout();
+        }
+        if (!CANONICAL_LAYOUTS_CACHE.contains(valueLayout.withoutName())) {
+            throw new IllegalArgumentException("Unsupported layout: " + valueLayout);
+        }
+    }
+
+    private void checkHasNaturalAlignment(MemoryLayout layout) {
+        if (!((AbstractLayout<?>) layout).hasNaturalAlignment()) {
+            throw new IllegalArgumentException("Layout alignment must be natural alignment: " + layout);
+        }
+    }
+
+    @SuppressWarnings("restricted")
+    private static MemoryLayout stripNames(MemoryLayout ml) {
+        // we don't care about transferring alignment and byte order here
+        // since the linker already restricts those such that they will always be the same
+        return switch (ml) {
+            case StructLayout sl -> MemoryLayout.structLayout(stripNames(sl.memberLayouts()));
+            case UnionLayout ul -> MemoryLayout.unionLayout(stripNames(ul.memberLayouts()));
+            case SequenceLayout sl -> MemoryLayout.sequenceLayout(sl.elementCount(), stripNames(sl.elementLayout()));
+            case AddressLayout al -> al.targetLayout()
+                    .map(tl -> al.withoutName().withTargetLayout(stripNames(tl))) // restricted
+                    .orElseGet(al::withoutName);
+            default -> ml.withoutName(); // ValueLayout and PaddingLayout
+        };
+    }
+
+    private static MemoryLayout[] stripNames(List<MemoryLayout> layouts) {
+        return layouts.stream()
+                .map(AbstractLinker::stripNames)
+                .toArray(MemoryLayout[]::new);
+    }
+
+    private static FunctionDescriptor stripNames(FunctionDescriptor function) {
+        return function.returnLayout()
+                .map(rl -> FunctionDescriptor.of(stripNames(rl), stripNames(function.argumentLayouts())))
+                .orElseGet(() -> FunctionDescriptor.ofVoid(stripNames(function.argumentLayouts())));
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/foreign/abi/Architecture.class b/tests/test_data/std/jdk/internal/foreign/abi/Architecture.class
new file mode 100644
index 0000000000000000000000000000000000000000..b273cfcbaf08a5c9fe4fc4de2462e6eddca6ecbb
GIT binary patch
literal 185
zcmYk0F%E)26h!AE0z#vQFww?6gE29ovcSr2Sy%i(7PBrUdNd0U;Gv95VqrONk~j1I
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zsha)$q6y(5UmggF^Qqv+kK}~3=z6R4mRrwe|Kio)j0l90KLrGSXN(BLUW~*O!ern`
Ezo}g;?EnA(

literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/foreign/abi/Architecture.java b/tests/test_data/std/jdk/internal/foreign/abi/Architecture.java
new file mode 100644
index 00000000..c94c4485
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/foreign/abi/Architecture.java
@@ -0,0 +1,30 @@
+/*
+ * Copyright (c) 2020, 2022, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package jdk.internal.foreign.abi;
+
+public interface Architecture {
+    boolean isStackType(int cls);
+    int typeSize(int cls);
+}
diff --git a/tests/test_data/std/jdk/internal/foreign/abi/Binding$Allocate.class b/tests/test_data/std/jdk/internal/foreign/abi/Binding$Allocate.class
new file mode 100644
index 0000000000000000000000000000000000000000..c2b277e5721ecb7f59dc48aa6affd96f2b0b9012
GIT binary patch
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/foreign/abi/Binding$BoxAddress.class b/tests/test_data/std/jdk/internal/foreign/abi/Binding$BoxAddress.class
new file mode 100644
index 0000000000000000000000000000000000000000..149b82ee29bf5e265a3fc97c712e0736d2edc0a7
GIT binary patch
literal 3818
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diff --git a/tests/test_data/std/jdk/internal/foreign/abi/Binding$BufferLoad.class b/tests/test_data/std/jdk/internal/foreign/abi/Binding$BufferLoad.class
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diff --git a/tests/test_data/std/jdk/internal/foreign/abi/Binding$BufferStore.class b/tests/test_data/std/jdk/internal/foreign/abi/Binding$BufferStore.class
new file mode 100644
index 0000000000000000000000000000000000000000..182e2ebf0022184f43750e37433902c4503f0f19
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diff --git a/tests/test_data/std/jdk/internal/foreign/abi/Binding$Builder.class b/tests/test_data/std/jdk/internal/foreign/abi/Binding$Builder.class
new file mode 100644
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GIT binary patch
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diff --git a/tests/test_data/std/jdk/internal/foreign/abi/Binding$Cast$1.class b/tests/test_data/std/jdk/internal/foreign/abi/Binding$Cast$1.class
new file mode 100644
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GIT binary patch
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diff --git a/tests/test_data/std/jdk/internal/foreign/abi/Binding$Cast.class b/tests/test_data/std/jdk/internal/foreign/abi/Binding$Cast.class
new file mode 100644
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GIT binary patch
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diff --git a/tests/test_data/std/jdk/internal/foreign/abi/Binding$Copy.class b/tests/test_data/std/jdk/internal/foreign/abi/Binding$Copy.class
new file mode 100644
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HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/foreign/abi/Binding$Dereference.class b/tests/test_data/std/jdk/internal/foreign/abi/Binding$Dereference.class
new file mode 100644
index 0000000000000000000000000000000000000000..90691de4a61be6e6e60948c6e1a5b7c55de8d28b
GIT binary patch
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HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/foreign/abi/Binding$Dup.class b/tests/test_data/std/jdk/internal/foreign/abi/Binding$Dup.class
new file mode 100644
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HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/foreign/abi/Binding$Move.class b/tests/test_data/std/jdk/internal/foreign/abi/Binding$Move.class
new file mode 100644
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GIT binary patch
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HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/foreign/abi/Binding$SegmentBase.class b/tests/test_data/std/jdk/internal/foreign/abi/Binding$SegmentBase.class
new file mode 100644
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GIT binary patch
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HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/foreign/abi/Binding$SegmentOffset.class b/tests/test_data/std/jdk/internal/foreign/abi/Binding$SegmentOffset.class
new file mode 100644
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GIT binary patch
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HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/foreign/abi/Binding$ShiftLeft.class b/tests/test_data/std/jdk/internal/foreign/abi/Binding$ShiftLeft.class
new file mode 100644
index 0000000000000000000000000000000000000000..8837381fafc080e46d160fd49d767d310f44cf11
GIT binary patch
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/foreign/abi/Binding$ShiftRight.class b/tests/test_data/std/jdk/internal/foreign/abi/Binding$ShiftRight.class
new file mode 100644
index 0000000000000000000000000000000000000000..cdff094b703a2ef4d8194388f49d6d060f67a516
GIT binary patch
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/foreign/abi/Binding$VMLoad.class b/tests/test_data/std/jdk/internal/foreign/abi/Binding$VMLoad.class
new file mode 100644
index 0000000000000000000000000000000000000000..ec7875d023311b398e273cd208804c701ae7ddd2
GIT binary patch
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/foreign/abi/Binding$VMStore.class b/tests/test_data/std/jdk/internal/foreign/abi/Binding$VMStore.class
new file mode 100644
index 0000000000000000000000000000000000000000..29246e25ef89a02566a01e347e0a3f1390c03c97
GIT binary patch
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/foreign/abi/Binding.class b/tests/test_data/std/jdk/internal/foreign/abi/Binding.class
new file mode 100644
index 0000000000000000000000000000000000000000..a4ad3ae32b018c81e66f47723b84a2a82e86a458
GIT binary patch
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diff --git a/tests/test_data/std/jdk/internal/foreign/abi/Binding.java b/tests/test_data/std/jdk/internal/foreign/abi/Binding.java
new file mode 100644
index 00000000..1f7f3327
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/foreign/abi/Binding.java
@@ -0,0 +1,902 @@
+/*
+ * Copyright (c) 2020, 2024, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package jdk.internal.foreign.abi;
+
+import jdk.internal.foreign.AbstractMemorySegmentImpl;
+import jdk.internal.foreign.Utils;
+import jdk.internal.foreign.abi.BindingInterpreter.LoadFunc;
+import jdk.internal.foreign.abi.BindingInterpreter.StoreFunc;
+
+import java.lang.foreign.*;
+import java.lang.invoke.MethodHandle;
+import java.lang.invoke.MethodHandles;
+import java.lang.invoke.MethodType;
+import java.util.ArrayList;
+import java.util.Deque;
+import java.util.List;
+
+import static java.lang.foreign.ValueLayout.JAVA_BYTE;
+import static java.lang.foreign.ValueLayout.JAVA_INT_UNALIGNED;
+import static java.lang.foreign.ValueLayout.JAVA_SHORT_UNALIGNED;
+
+/**
+ * The binding operators defined in the Binding class can be combined into argument and return value processing 'recipes'.
+ *
+ * The binding operators are interpreted using a stack-base interpreter. Operators can either consume operands from the
+ * stack, or push them onto the stack.
+ *
+ * In the description of each binding we talk about 'boxing' and 'unboxing'.
+ *  - Unboxing is the process of taking a Java value and decomposing it, and storing components into machine
+ *    storage locations. As such, the binding interpreter stack starts with the Java value on it, and should end empty.
+ *  - Boxing is the process of re-composing a Java value by pulling components from machine storage locations.
+ *    If a MemorySegment is needed to store the result, one should be allocated using the ALLOCATE_BUFFER operator.
+ *    The binding interpreter stack starts off empty, and ends with the value to be returned as the only value on it.
+ * A binding operator can be interpreted differently based on whether we are boxing or unboxing a value. For example,
+ * the CONVERT_ADDRESS operator 'unboxes' a MemoryAddress to a long, but 'boxes' a long to a MemoryAddress.
+ *
+ * Here are some examples of binding recipes derived from C declarations, and according to the Windows ABI (recipes are
+ * ABI-specific). Note that each argument has its own recipe, which is indicated by '[number]:' (though, the only
+ * example that has multiple arguments is the one using varargs).
+ *
+ * --------------------
+ *
+ * void f(int i);
+ *
+ * Argument bindings:
+ * 0: VM_STORE(rcx, int.class) // move an 'int' into the RCX register
+ *
+ * Return bindings:
+ * none
+ *
+ * --------------------
+ *
+ * void f(int* i);
+ *
+ * Argument bindings:
+ * 0: UNBOX_ADDRESS // the 'MemoryAddress' is converted into a 'long'
+ *    VM_STORE(rcx, long.class) // the 'long' is moved into the RCX register
+ *
+ * Return bindings:
+ * none
+ *
+ * --------------------
+ *
+ * int* f();
+ *
+ * Argument bindings:
+ * none
+ *
+ * Return bindings:
+ * 0: VM_LOAD(rax, long) // load a 'long' from the RAX register
+ *    BOX_ADDRESS // convert the 'long' into a 'MemoryAddress'
+ *
+ * --------------------
+ *
+ * typedef struct { // fits into single register
+ *   int x;
+ *   int y;
+ * } MyStruct;
+ *
+ * void f(MyStruct ms);
+ *
+ * Argument bindings:
+ * 0: BUFFER_LOAD(0, long.class) // From the struct's memory region, load a 'long' from offset '0'
+ *    VM_STORE(rcx, long.class) // and copy that into the RCX register
+ *
+ * Return bindings:
+ * none
+ *
+ * --------------------
+ *
+ * typedef struct { // does not fit into single register
+ *   long long x;
+ *   long long y;
+ * } MyStruct;
+ *
+ * void f(MyStruct ms);
+ *
+ * For the Windows ABI:
+ *
+ * Argument bindings:
+ * 0: COPY(16, 8) // copy the memory region containing the struct
+ *    BASE_ADDRESS // take the base address of the copy
+ *    UNBOX_ADDRESS // converts the base address to a 'long'
+ *    VM_STORE(rcx, long.class) // moves the 'long' into the RCX register
+ *
+ * Return bindings:
+ * none
+ *
+ * For the SysV ABI:
+ *
+ * Argument bindings:
+ * 0: DUP // duplicates the MemoryRegion operand
+ *    BUFFER_LOAD(0, long.class) // loads a 'long' from offset '0'
+ *    VM_STORE(rdx, long.class) // moves the long into the RDX register
+ *    BUFFER_LOAD(8, long.class) // loads a 'long' from offset '8'
+ *    VM_STORE(rcx, long.class) // moves the long into the RCX register
+ *
+ * Return bindings:
+ * none
+ *
+ * --------------------
+ *
+ * typedef struct { // fits into single register
+ *   int x;
+ *   int y;
+ * } MyStruct;
+ *
+ * MyStruct f();
+ *
+ * Argument bindings:
+ * none
+ *
+ * Return bindings:
+ * 0: ALLOCATE(GroupLayout(C_INT, C_INT)) // allocate a buffer with the memory layout of the struct
+ *    DUP // duplicate the allocated buffer
+ *    VM_LOAD(rax, long.class) // loads a 'long' from rax
+ *    BUFFER_STORE(0, long.class) // stores a 'long' at offset 0
+ *
+ * --------------------
+ *
+ * typedef struct { // does not fit into single register
+ *   long long x;
+ *   long long y;
+ * } MyStruct;
+ *
+ * MyStruct f();
+ *
+ * !! uses synthetic argument, which is a pointer to a pre-allocated buffer
+ *
+ * Argument bindings:
+ * 0: UNBOX_ADDRESS // unbox the MemoryAddress synthetic argument
+ *    VM_STORE(rcx, long.class) // moves the 'long' into the RCX register
+ *
+ * Return bindings:
+ * none
+ *
+ * --------------------
+ *
+ * void f(int dummy, ...); // varargs
+ *
+ * f(0, 10f); // passing a float
+ *
+ * Argument bindings:
+ * 0: VM_STORE(rcx, int.class) // moves the 'int dummy' into the RCX register
+ *
+ * 1: DUP // duplicates the '10f' argument
+ *    VM_STORE(rdx, float.class) // move one copy into the RDX register
+ *    VM_STORE(xmm1, float.class) // moves the other copy into the xmm2 register
+ *
+ * Return bindings:
+ * none
+ *
+ * --------------------
+ */
+public sealed interface Binding {
+
+    void verify(Deque<Class<?>> stack);
+
+    void interpret(Deque<Object> stack, StoreFunc storeFunc,
+                   LoadFunc loadFunc, SegmentAllocator allocator);
+
+    private static void checkType(Class<?> type) {
+        if (type != Object.class && (!type.isPrimitive() || type == void.class))
+            throw new IllegalArgumentException("Illegal type: " + type);
+    }
+
+    private static void checkOffset(long offset) {
+        if (offset < 0)
+            throw new IllegalArgumentException("Negative offset: " + offset);
+    }
+
+    private static void checkByteWidth(int byteWidth, Class<?> type) {
+        if (byteWidth < 0 || byteWidth > Utils.byteWidthOfPrimitive(type))
+            throw new IllegalArgumentException("Illegal byteWidth: " + byteWidth);
+    }
+
+    static VMStore vmStore(VMStorage storage, Class<?> type) {
+        checkType(type);
+        return new VMStore(storage, type);
+    }
+
+    static VMLoad vmLoad(VMStorage storage, Class<?> type) {
+        checkType(type);
+        return new VMLoad(storage, type);
+    }
+
+    static BufferStore bufferStore(long offset, Class<?> type) {
+        return bufferStore(offset, type, Utils.byteWidthOfPrimitive(type));
+    }
+
+    static BufferStore bufferStore(long offset, Class<?> type, int byteWidth) {
+        checkType(type);
+        checkOffset(offset);
+        checkByteWidth(byteWidth, type);
+        return new BufferStore(offset, type, byteWidth);
+    }
+
+    static BufferLoad bufferLoad(long offset, Class<?> type) {
+        return Binding.bufferLoad(offset, type, Utils.byteWidthOfPrimitive(type));
+    }
+
+    static BufferLoad bufferLoad(long offset, Class<?> type, int byteWidth) {
+        checkType(type);
+        checkOffset(offset);
+        checkByteWidth(byteWidth, type);
+        return new BufferLoad(offset, type, byteWidth);
+    }
+
+    static Copy copy(MemoryLayout layout) {
+        return new Copy(layout.byteSize(), layout.byteAlignment());
+    }
+
+    static Allocate allocate(MemoryLayout layout) {
+        return new Allocate(layout.byteSize(), layout.byteAlignment());
+    }
+
+    static BoxAddress boxAddressRaw(long size, long align) {
+        return new BoxAddress(size, align, false);
+    }
+
+    static BoxAddress boxAddress(MemoryLayout layout) {
+        return new BoxAddress(layout.byteSize(), layout.byteAlignment(), true);
+    }
+
+    static BoxAddress boxAddress(long byteSize) {
+        return new BoxAddress(byteSize, 1, true);
+    }
+
+    // alias
+    static SegmentOffset unboxAddress() {
+        return segmentOffsetNoAllowHeap();
+    }
+
+    static SegmentBase segmentBase() {
+        return SegmentBase.INSTANCE;
+    }
+
+    static SegmentOffset segmentOffsetAllowHeap() {
+        return SegmentOffset.INSTANCE_ALLOW_HEAP;
+    }
+
+    static SegmentOffset segmentOffsetNoAllowHeap() {
+        return SegmentOffset.INSTANCE_NO_ALLOW_HEAP;
+    }
+
+    static Dup dup() {
+        return Dup.INSTANCE;
+    }
+
+    static ShiftLeft shiftLeft(int shiftAmount) {
+        if (shiftAmount <= 0)
+            throw new IllegalArgumentException("shiftAmount must be positive");
+        return new ShiftLeft(shiftAmount);
+    }
+
+    static ShiftRight shiftRight(int shiftAmount) {
+        if (shiftAmount <= 0)
+            throw new IllegalArgumentException("shiftAmount must be positive");
+        return new ShiftRight(shiftAmount);
+    }
+
+    static Binding cast(Class<?> fromType, Class<?> toType) {
+        if (fromType == int.class) {
+            if (toType == boolean.class) {
+                return Cast.INT_TO_BOOLEAN;
+            } else if (toType == byte.class) {
+                return Cast.INT_TO_BYTE;
+            } else if (toType == short.class) {
+                return Cast.INT_TO_SHORT;
+            } else if (toType == char.class) {
+                return Cast.INT_TO_CHAR;
+            } else if (toType == long.class) {
+                return Cast.INT_TO_LONG;
+            }
+        } else if (toType == int.class) {
+            if (fromType == boolean.class) {
+                return Cast.BOOLEAN_TO_INT;
+            } else if (fromType == byte.class) {
+                return Cast.BYTE_TO_INT;
+            } else if (fromType == short.class) {
+                return Cast.SHORT_TO_INT;
+            } else if (fromType == char.class) {
+                return Cast.CHAR_TO_INT;
+            } else if (fromType == long.class) {
+                return Cast.LONG_TO_INT;
+            }
+        } else if (fromType == long.class) {
+            if (toType == byte.class) {
+                return Cast.LONG_TO_BYTE;
+            } else if (toType == short.class) {
+                return Cast.LONG_TO_SHORT;
+            } else if (toType == char.class) {
+                return Cast.LONG_TO_CHAR;
+            }
+        } else if (toType == long.class) {
+            if (fromType == byte.class) {
+                return Cast.BYTE_TO_LONG;
+            } else if (fromType == short.class) {
+                return Cast.SHORT_TO_LONG;
+            } else if (fromType == char.class) {
+                return Cast.CHAR_TO_LONG;
+            }
+        }
+        throw new IllegalArgumentException("Unknown conversion: " + fromType + " -> " + toType);
+    }
+
+
+    static Binding.Builder builder() {
+        return new Binding.Builder();
+    }
+
+    /**
+     * A builder helper class for generating lists of Bindings
+     */
+    class Builder {
+        private final List<Binding> bindings = new ArrayList<>();
+
+        private static boolean isSubIntType(Class<?> type) {
+            return type == boolean.class || type == byte.class || type == short.class || type == char.class;
+        }
+
+        public Binding.Builder vmStore(VMStorage storage, Class<?> type) {
+            if (isSubIntType(type)) {
+                bindings.add(Binding.cast(type, int.class));
+                type = int.class;
+            }
+            bindings.add(Binding.vmStore(storage, type));
+            return this;
+        }
+
+        public Binding.Builder vmLoad(VMStorage storage, Class<?> type) {
+            Class<?> loadType = type;
+            if (isSubIntType(type)) {
+                loadType = int.class;
+            }
+            bindings.add(Binding.vmLoad(storage, loadType));
+            if (isSubIntType(type)) {
+                bindings.add(Binding.cast(int.class, type));
+            }
+            return this;
+        }
+
+        public Binding.Builder bufferStore(long offset, Class<?> type) {
+            bindings.add(Binding.bufferStore(offset, type));
+            return this;
+        }
+
+        public Binding.Builder bufferStore(long offset, Class<?> type, int byteWidth) {
+            bindings.add(Binding.bufferStore(offset, type, byteWidth));
+            return this;
+        }
+
+        public Binding.Builder bufferLoad(long offset, Class<?> type) {
+            bindings.add(Binding.bufferLoad(offset, type));
+            return this;
+        }
+
+        public Binding.Builder bufferLoad(long offset, Class<?> type, int byteWidth) {
+            bindings.add(Binding.bufferLoad(offset, type, byteWidth));
+            return this;
+        }
+
+        public Binding.Builder copy(MemoryLayout layout) {
+            bindings.add(Binding.copy(layout));
+            return this;
+        }
+
+        public Binding.Builder allocate(MemoryLayout layout) {
+            bindings.add(Binding.allocate(layout));
+            return this;
+        }
+
+        public Binding.Builder boxAddressRaw(long size, long align) {
+            bindings.add(Binding.boxAddressRaw(size, align));
+            return this;
+        }
+
+        public Binding.Builder boxAddress(MemoryLayout layout) {
+            bindings.add(Binding.boxAddress(layout));
+            return this;
+        }
+
+        public Binding.Builder unboxAddress() {
+            bindings.add(Binding.unboxAddress());
+            return this;
+        }
+
+        public Binding.Builder segmentBase() {
+            bindings.add(Binding.segmentBase());
+            return this;
+        }
+
+        public Binding.Builder segmentOffsetAllowHeap() {
+            bindings.add(Binding.segmentOffsetAllowHeap());
+            return this;
+        }
+
+        public Binding.Builder segmentOffsetNoAllowHeap() {
+            bindings.add(Binding.segmentOffsetNoAllowHeap());
+            return this;
+        }
+
+        public Binding.Builder dup() {
+            bindings.add(Binding.dup());
+            return this;
+        }
+
+        // Converts to long if needed then shifts left by the given number of Bytes.
+        public Binding.Builder shiftLeft(int shiftAmount, Class<?> type) {
+            if (type != long.class) {
+                bindings.add(Binding.cast(type, long.class));
+            }
+            bindings.add(Binding.shiftLeft(shiftAmount));
+            return this;
+        }
+
+        // Shifts right by the given number of Bytes then converts from long if needed.
+        public Binding.Builder shiftRight(int shiftAmount, Class<?> type) {
+            bindings.add(Binding.shiftRight(shiftAmount));
+            if (type != long.class) {
+                bindings.add(Binding.cast(long.class, type));
+            }
+            return this;
+        }
+
+        public List<Binding> build() {
+            return List.copyOf(bindings);
+        }
+    }
+
+    sealed interface Move extends Binding {
+        VMStorage storage();
+        Class<?> type();
+    }
+
+    /**
+     * VM_STORE([storage location], [type])
+     *   Pops a [type] from the operand stack, and moves it to [storage location]
+     *   The [type] must be one of byte, short, char, int, long, float, or double.
+     *   [storage location] may be 'null', indicating that this value should be passed
+     *   to the VM stub, but does not have an explicit target register (e.g. oop offsets)
+     */
+    record VMStore(VMStorage storage, Class<?> type) implements Move {
+
+        @Override
+        public void verify(Deque<Class<?>> stack) {
+            Class<?> actualType = stack.pop();
+            Class<?> expectedType = type();
+            SharedUtils.checkType(actualType, expectedType);
+        }
+
+        @Override
+        public void interpret(Deque<Object> stack, StoreFunc storeFunc,
+                              LoadFunc loadFunc, SegmentAllocator allocator) {
+            storeFunc.store(storage(), stack.pop());
+        }
+    }
+
+    /**
+     * VM_LOAD([storage location], [type])
+     *   Loads a [type] from [storage location], and pushes it onto the operand stack.
+     *   The [type] must be one of byte, short, char, int, long, float, or double
+     */
+    record VMLoad(VMStorage storage, Class<?> type) implements Move {
+
+        @Override
+        public void verify(Deque<Class<?>> stack) {
+            stack.push(type());
+        }
+
+        @Override
+        public void interpret(Deque<Object> stack, StoreFunc storeFunc,
+                              LoadFunc loadFunc, SegmentAllocator allocator) {
+            stack.push(loadFunc.load(storage(), type()));
+        }
+    }
+
+    sealed interface Dereference extends Binding {
+        long offset();
+        Class<?> type();
+    }
+
+    /**
+     * BUFFER_STORE([offset into memory region], [type], [width])
+     *   Pops a [type] from the operand stack, then pops a MemorySegment from the operand stack.
+     *   Stores [width] bytes of the value contained in the [type] to [offset into memory region].
+     *   The [type] must be one of byte, short, char, int, long, float, or double
+     */
+    record BufferStore(long offset, Class<?> type, int byteWidth) implements Dereference {
+
+        @Override
+        public void verify(Deque<Class<?>> stack) {
+            Class<?> storeType = stack.pop();
+            SharedUtils.checkType(storeType, type());
+            Class<?> segmentType = stack.pop();
+            SharedUtils.checkType(segmentType, MemorySegment.class);
+        }
+
+        @Override
+        public void interpret(Deque<Object> stack, StoreFunc storeFunc,
+                              LoadFunc loadFunc, SegmentAllocator allocator) {
+            Object value = stack.pop();
+            MemorySegment writeAddress = (MemorySegment) stack.pop();
+            if (SharedUtils.isPowerOfTwo(byteWidth())) {
+                // exact size match
+                SharedUtils.write(writeAddress, offset(), type(), value);
+            } else {
+                // non-exact match, need to do chunked load
+                long longValue = ((Number) value).longValue();
+                // byteWidth is smaller than the width of 'type', so it will always be < 8 here
+                int remaining = byteWidth();
+                int chunkOffset = 0;
+                do {
+                    int chunkSize = Integer.highestOneBit(remaining); // next power of 2, in bytes
+                    long writeOffset = offset() + SharedUtils.pickChunkOffset(chunkOffset, byteWidth(), chunkSize);
+                    int shiftAmount = chunkOffset * Byte.SIZE;
+                    switch (chunkSize) {
+                        case 4 -> {
+                            int writeChunk = (int) (((0xFFFF_FFFFL << shiftAmount) & longValue) >>> shiftAmount);
+                            writeAddress.set(JAVA_INT_UNALIGNED, writeOffset, writeChunk);
+                        }
+                        case 2 -> {
+                            short writeChunk = (short) (((0xFFFFL << shiftAmount) & longValue) >>> shiftAmount);
+                            writeAddress.set(JAVA_SHORT_UNALIGNED, writeOffset, writeChunk);
+                        }
+                        case 1 -> {
+                            byte writeChunk = (byte) (((0xFFL << shiftAmount) & longValue) >>> shiftAmount);
+                            writeAddress.set(JAVA_BYTE, writeOffset, writeChunk);
+                        }
+                        default ->
+                           throw new IllegalStateException("Unexpected chunk size for chunked write: " + chunkSize);
+                    }
+                    remaining -= chunkSize;
+                    chunkOffset += chunkSize;
+                } while (remaining != 0);
+            }
+        }
+    }
+
+    /**
+     * BUFFER_LOAD([offset into memory region], [type], [width])
+     *   Pops a MemorySegment from the operand stack,
+     *   and then loads [width] bytes from it at [offset into memory region], into a [type].
+     *   The [type] must be one of byte, short, char, int, long, float, or double
+     */
+    record BufferLoad(long offset, Class<?> type, int byteWidth) implements Dereference {
+
+        @Override
+        public void verify(Deque<Class<?>> stack) {
+            Class<?> actualType = stack.pop();
+            SharedUtils.checkType(actualType, MemorySegment.class);
+            Class<?> newType = type();
+            stack.push(newType);
+        }
+
+        @Override
+        public void interpret(Deque<Object> stack, StoreFunc storeFunc,
+                              LoadFunc loadFunc, SegmentAllocator allocator) {
+            MemorySegment readAddress = (MemorySegment) stack.pop();
+            if (SharedUtils.isPowerOfTwo(byteWidth())) {
+                // exact size match
+                stack.push(SharedUtils.read(readAddress, offset(), type()));
+            } else {
+                // non-exact match, need to do chunked load
+                long result = 0;
+                // byteWidth is smaller than the width of 'type', so it will always be < 8 here
+                int remaining = byteWidth();
+                int chunkOffset = 0;
+                do {
+                    int chunkSize = Integer.highestOneBit(remaining); // next power of 2
+                    long readOffset = offset() + SharedUtils.pickChunkOffset(chunkOffset, byteWidth(), chunkSize);
+                    long readChunk = switch (chunkSize) {
+                        case 4 -> Integer.toUnsignedLong(readAddress.get(JAVA_INT_UNALIGNED, readOffset));
+                        case 2 -> Short.toUnsignedLong(readAddress.get(JAVA_SHORT_UNALIGNED, readOffset));
+                        case 1 -> Byte.toUnsignedLong(readAddress.get(JAVA_BYTE, readOffset));
+                        default ->
+                            throw new IllegalStateException("Unexpected chunk size for chunked write: " + chunkSize);
+                    };
+                    result |= readChunk << (chunkOffset * Byte.SIZE);
+                    remaining -= chunkSize;
+                    chunkOffset += chunkSize;
+                } while (remaining != 0);
+
+                if (type() == int.class) { // 3 byte write
+                    stack.push((int) result);
+                } else if (type() == long.class) { // 5, 6, 7 byte write
+                    stack.push(result);
+                } else {
+                    throw new IllegalStateException("Unexpected type for chunked load: " + type());
+                }
+            }
+        }
+    }
+
+    /**
+     * COPY([size], [alignment])
+     *   Creates a new MemorySegment with the given [size] and [alignment],
+     *   and copies contents from a MemorySegment popped from the top of the operand stack into this new buffer,
+     *   and pushes the new buffer onto the operand stack
+     */
+    record Copy(long size, long alignment) implements Binding {
+        private static MemorySegment copyBuffer(MemorySegment operand, long size, long alignment, SegmentAllocator allocator) {
+            return allocator.allocate(size, alignment)
+                            .copyFrom(operand.asSlice(0, size));
+        }
+
+        @Override
+        public void verify(Deque<Class<?>> stack) {
+            Class<?> actualType = stack.pop();
+            SharedUtils.checkType(actualType, MemorySegment.class);
+            stack.push(MemorySegment.class);
+        }
+
+        @Override
+        public void interpret(Deque<Object> stack, StoreFunc storeFunc,
+                              LoadFunc loadFunc, SegmentAllocator allocator) {
+            MemorySegment operand = (MemorySegment) stack.pop();
+            MemorySegment copy = copyBuffer(operand, size, alignment, allocator);
+            stack.push(copy);
+        }
+    }
+
+    /**
+     * ALLOCATE([size], [alignment])
+     *   Creates a new MemorySegment with the give [size] and [alignment], and pushes it onto the operand stack.
+     */
+    record Allocate(long size, long alignment) implements Binding {
+        private static MemorySegment allocateBuffer(long size, long alignment, SegmentAllocator allocator) {
+            return allocator.allocate(size, alignment);
+        }
+
+        @Override
+        public void verify(Deque<Class<?>> stack) {
+            stack.push(MemorySegment.class);
+        }
+
+        @Override
+        public void interpret(Deque<Object> stack, StoreFunc storeFunc,
+                              LoadFunc loadFunc, SegmentAllocator allocator) {
+            stack.push(allocateBuffer(size, alignment, allocator));
+        }
+    }
+
+    /**
+     * SEGMENT_BASE()
+     *   Pops a MemorySegment from the stack, retrieves the heap base object from it, or null if there is none
+     *   (See: AbstractMemorySegmentImpl::unsafeGetBase), and pushes the result onto the operand stack.
+     */
+    record SegmentBase() implements Binding {
+        static final SegmentBase INSTANCE = new SegmentBase();
+
+        @Override
+        public void verify(Deque<Class<?>> stack) {
+            Class<?> actualType = stack.pop();
+            SharedUtils.checkType(actualType, MemorySegment.class);
+            stack.push(Object.class);
+        }
+
+        @Override
+        public void interpret(Deque<Object> stack, StoreFunc storeFunc,
+                              LoadFunc loadFunc, SegmentAllocator allocator) {
+            stack.push(((AbstractMemorySegmentImpl)stack.pop()).unsafeGetBase());
+        }
+    }
+
+    /**
+     * SEGMENT_OFFSET([allowHeap])
+     *   Pops a MemorySegment from the stack, retrieves the offset from it,
+     *   (See: AbstractMemorySegmentImpl::unsafeGetOffset), and pushes the result onto the operand stack.
+     *   Note that for heap segments, the offset is a virtual address into the heap base object.
+     *   If [allowHeap] is 'false' an exception will be thrown for heap segments (See SharedUtils::checkNative).
+     */
+    record SegmentOffset(boolean allowHeap) implements Binding {
+        static final SegmentOffset INSTANCE_NO_ALLOW_HEAP = new SegmentOffset(false);
+        static final SegmentOffset INSTANCE_ALLOW_HEAP = new SegmentOffset(true);
+
+        @Override
+        public void verify(Deque<Class<?>> stack) {
+            Class<?> actualType = stack.pop();
+            SharedUtils.checkType(actualType, MemorySegment.class);
+            stack.push(long.class);
+        }
+
+        @Override
+        public void interpret(Deque<Object> stack, StoreFunc storeFunc,
+                              LoadFunc loadFunc, SegmentAllocator allocator) {
+            MemorySegment operand = (MemorySegment) stack.pop();
+            if (!allowHeap) {
+                SharedUtils.checkNative(operand);
+            }
+            stack.push(((AbstractMemorySegmentImpl)operand).unsafeGetOffset());
+        }
+    }
+
+    /**
+     * BOX_ADDRESS()
+     *   Pops a 'long' from the operand stack, converts it to a 'MemorySegment', with the given size and memory scope
+     *   (either the context scope, or the global scope), and pushes that onto the operand stack.
+     */
+    record BoxAddress(long size, long align, boolean needsScope) implements Binding {
+
+        @Override
+        public void verify(Deque<Class<?>> stack) {
+            Class<?> actualType = stack.pop();
+            SharedUtils.checkType(actualType, long.class);
+            stack.push(MemorySegment.class);
+        }
+
+        @Override
+        @SuppressWarnings("restricted")
+        public void interpret(Deque<Object> stack, StoreFunc storeFunc,
+                              LoadFunc loadFunc, SegmentAllocator allocator) {
+            MemorySegment segment = Utils.longToAddress((long) stack.pop(), size, align);
+            if (needsScope) {
+                segment = segment.reinterpret((Arena) allocator, null); // restricted
+            }
+            stack.push(segment);
+        }
+    }
+
+    /**
+     * DUP()
+     *   Duplicates the value on the top of the operand stack (without popping it!),
+     *   and pushes the duplicate onto the operand stack
+     */
+    record Dup() implements Binding {
+        static final Dup INSTANCE = new Dup();
+
+        @Override
+        public void verify(Deque<Class<?>> stack) {
+            stack.push(stack.peekLast());
+        }
+
+        @Override
+        public void interpret(Deque<Object> stack, StoreFunc storeFunc,
+                              LoadFunc loadFunc, SegmentAllocator allocator) {
+            stack.push(stack.peekLast());
+        }
+    }
+
+    /**
+     * ShiftLeft([shiftAmount])
+     *   Shifts the Bytes on the top of the operand stack (64 bit unsigned).
+     *   Shifts left by the given number of Bytes.
+     */
+    record ShiftLeft(int shiftAmount) implements Binding {
+
+        @Override
+        public void verify(Deque<Class<?>> stack) {
+            Class<?> last = stack.pop();
+            SharedUtils.checkType(last, long.class);
+            stack.push(long.class);
+        }
+
+        @Override
+        public void interpret(Deque<Object> stack, StoreFunc storeFunc,
+                              LoadFunc loadFunc, SegmentAllocator allocator) {
+            long l = (long) stack.pop();
+            l <<= (shiftAmount * Byte.SIZE);
+            stack.push(l);
+        }
+    }
+
+    /**
+     * ShiftRight([shiftAmount])
+     *   Shifts the Bytes on the top of the operand stack (64 bit unsigned).
+     *   Shifts right by the given number of Bytes.
+     */
+    record ShiftRight(int shiftAmount) implements Binding {
+
+        @Override
+        public void verify(Deque<Class<?>> stack) {
+            Class<?> last = stack.pop();
+            SharedUtils.checkType(last, long.class);
+            stack.push(long.class);
+        }
+
+        @Override
+        public void interpret(Deque<Object> stack, StoreFunc storeFunc,
+                              LoadFunc loadFunc, SegmentAllocator allocator) {
+            long l = (long) stack.pop();
+            l >>>= (shiftAmount * Byte.SIZE);
+            stack.push(l);
+        }
+    }
+
+    /**
+     * CAST([fromType], [toType])
+     *   Pop a [fromType] from the stack, convert it to [toType], and push the resulting
+     *   value onto the stack.
+     *
+     */
+    enum Cast implements Binding {
+        INT_TO_BOOLEAN(int.class, boolean.class) {
+            @Override
+            public void interpret(Deque<Object> stack, StoreFunc storeFunc,
+                                  LoadFunc loadFunc, SegmentAllocator allocator) {
+                // implement least significant byte non-zero test
+                int arg = (int) stack.pop();
+                boolean result = Utils.byteToBoolean((byte) arg);
+                stack.push(result);
+            }
+        },
+        INT_TO_BYTE(int.class, byte.class),
+        INT_TO_CHAR(int.class, char.class),
+        INT_TO_SHORT(int.class, short.class),
+        INT_TO_LONG(int.class, long.class),
+
+        BOOLEAN_TO_INT(boolean.class, int.class),
+        BYTE_TO_INT(byte.class, int.class),
+        CHAR_TO_INT(char.class, int.class),
+        SHORT_TO_INT(short.class, int.class),
+        LONG_TO_INT(long.class, int.class),
+
+        LONG_TO_BYTE(long.class, byte.class),
+        LONG_TO_SHORT(long.class, short.class),
+        LONG_TO_CHAR(long.class, char.class),
+
+        BYTE_TO_LONG(byte.class, long.class),
+        SHORT_TO_LONG(short.class, long.class),
+        CHAR_TO_LONG(char.class, long.class);
+
+        private final Class<?> fromType;
+        private final Class<?> toType;
+
+        Cast(Class<?> fromType, Class<?> toType) {
+            this.fromType = fromType;
+            this.toType = toType;
+        }
+
+        public Class<?> fromType() {
+            return fromType;
+        }
+
+        public Class<?> toType() {
+            return toType;
+        }
+
+        @Override
+        public void verify(Deque<Class<?>> stack) {
+            Class<?> actualType = stack.pop();
+            SharedUtils.checkType(actualType, fromType);
+            stack.push(toType);
+        }
+
+        @Override
+        public void interpret(Deque<Object> stack, StoreFunc storeFunc,
+                              LoadFunc loadFunc, SegmentAllocator allocator) {
+            Object arg = stack.pop();
+            MethodHandle converter = MethodHandles.explicitCastArguments(MethodHandles.identity(toType),
+                    MethodType.methodType(toType, fromType));
+            try {
+                Object result = converter.invoke(arg);
+                stack.push(result);
+            } catch (Throwable e) {
+                throw new InternalError(e);
+            }
+        }
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/foreign/abi/BindingInterpreter$LoadFunc.class b/tests/test_data/std/jdk/internal/foreign/abi/BindingInterpreter$LoadFunc.class
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diff --git a/tests/test_data/std/jdk/internal/foreign/abi/BindingInterpreter$StoreFunc.class b/tests/test_data/std/jdk/internal/foreign/abi/BindingInterpreter$StoreFunc.class
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diff --git a/tests/test_data/std/jdk/internal/foreign/abi/BindingInterpreter.class b/tests/test_data/std/jdk/internal/foreign/abi/BindingInterpreter.class
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diff --git a/tests/test_data/std/jdk/internal/foreign/abi/BindingInterpreter.java b/tests/test_data/std/jdk/internal/foreign/abi/BindingInterpreter.java
new file mode 100644
index 00000000..9434e70a
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/foreign/abi/BindingInterpreter.java
@@ -0,0 +1,61 @@
+/*
+ *  Copyright (c) 2020, 2023, Oracle and/or its affiliates. All rights reserved.
+ *  DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ *  This code is free software; you can redistribute it and/or modify it
+ *  under the terms of the GNU General Public License version 2 only, as
+ *  published by the Free Software Foundation.  Oracle designates this
+ *  particular file as subject to the "Classpath" exception as provided
+ *  by Oracle in the LICENSE file that accompanied this code.
+ *
+ *  This code is distributed in the hope that it will be useful, but WITHOUT
+ *  ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ *  FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ *  version 2 for more details (a copy is included in the LICENSE file that
+ *  accompanied this code).
+ *
+ *  You should have received a copy of the GNU General Public License version
+ *  2 along with this work; if not, write to the Free Software Foundation,
+ *  Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ *  Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ *  or visit www.oracle.com if you need additional information or have any
+ *  questions.
+ */
+package jdk.internal.foreign.abi;
+
+import java.lang.foreign.SegmentAllocator;
+import java.util.ArrayDeque;
+import java.util.Deque;
+import java.util.LinkedList;
+import java.util.List;
+
+public class BindingInterpreter {
+
+    static void unbox(Object arg, List<Binding> bindings, StoreFunc storeFunc, SegmentAllocator allocator) {
+        Deque<Object> stack = new LinkedList<>(); // Use LinkedList as a null-friendly Deque for null segment bases
+
+        stack.push(arg);
+        for (Binding b : bindings) {
+            b.interpret(stack, storeFunc, null, allocator);
+        }
+    }
+
+    static Object box(List<Binding> bindings, LoadFunc loadFunc, SegmentAllocator allocator) {
+        Deque<Object> stack = new ArrayDeque<>();
+        for (Binding b : bindings) {
+            b.interpret(stack, null, loadFunc, allocator);
+        }
+       return stack.pop();
+    }
+
+    @FunctionalInterface
+    public interface StoreFunc {
+        void store(VMStorage storage, Object o);
+    }
+
+    @FunctionalInterface
+    public interface LoadFunc {
+        Object load(VMStorage storage, Class<?> type);
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/foreign/abi/BindingSpecializer$1.class b/tests/test_data/std/jdk/internal/foreign/abi/BindingSpecializer$1.class
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diff --git a/tests/test_data/std/jdk/internal/foreign/abi/BindingSpecializer.class b/tests/test_data/std/jdk/internal/foreign/abi/BindingSpecializer.class
new file mode 100644
index 0000000000000000000000000000000000000000..3dec97e9ab3986a1ac3a10ecd9f0238f8eb00d9d
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HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/foreign/abi/BindingSpecializer.java b/tests/test_data/std/jdk/internal/foreign/abi/BindingSpecializer.java
new file mode 100644
index 00000000..7f5ef54b
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/foreign/abi/BindingSpecializer.java
@@ -0,0 +1,996 @@
+/*
+ * Copyright (c) 2022, 2023, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package jdk.internal.foreign.abi;
+
+import java.lang.classfile.ClassFile;
+import java.lang.classfile.CodeBuilder;
+import java.lang.classfile.Label;
+import java.lang.classfile.Opcode;
+import java.lang.classfile.TypeKind;
+import jdk.internal.foreign.AbstractMemorySegmentImpl;
+import jdk.internal.foreign.MemorySessionImpl;
+import jdk.internal.foreign.Utils;
+import jdk.internal.foreign.abi.Binding.Allocate;
+import jdk.internal.foreign.abi.Binding.BoxAddress;
+import jdk.internal.foreign.abi.Binding.BufferLoad;
+import jdk.internal.foreign.abi.Binding.BufferStore;
+import jdk.internal.foreign.abi.Binding.Cast;
+import jdk.internal.foreign.abi.Binding.Copy;
+import jdk.internal.foreign.abi.Binding.Dup;
+import jdk.internal.foreign.abi.Binding.SegmentBase;
+import jdk.internal.foreign.abi.Binding.SegmentOffset;
+import jdk.internal.foreign.abi.Binding.ShiftLeft;
+import jdk.internal.foreign.abi.Binding.ShiftRight;
+import jdk.internal.foreign.abi.Binding.VMLoad;
+import jdk.internal.foreign.abi.Binding.VMStore;
+import sun.security.action.GetBooleanAction;
+import sun.security.action.GetPropertyAction;
+
+import java.io.IOException;
+import java.lang.constant.ClassDesc;
+import java.lang.constant.Constable;
+import java.lang.constant.ConstantDesc;
+import java.lang.constant.DynamicConstantDesc;
+import java.lang.constant.MethodTypeDesc;
+import java.lang.foreign.*;
+import java.lang.invoke.MethodHandle;
+import java.lang.invoke.MethodHandles;
+import java.lang.invoke.MethodType;
+import java.lang.reflect.ClassFileFormatVersion;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.util.ArrayDeque;
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.Deque;
+import java.util.List;
+
+import static java.lang.constant.ConstantDescs.*;
+import static java.lang.classfile.ClassFile.*;
+import static java.lang.classfile.TypeKind.*;
+
+public class BindingSpecializer {
+    private static final String DUMP_CLASSES_DIR
+        = GetPropertyAction.privilegedGetProperty("jdk.internal.foreign.abi.Specializer.DUMP_CLASSES_DIR");
+    private static final boolean PERFORM_VERIFICATION
+        = GetBooleanAction.privilegedGetProperty("jdk.internal.foreign.abi.Specializer.PERFORM_VERIFICATION");
+
+    // Bunch of helper constants
+    private static final int CLASSFILE_VERSION = ClassFileFormatVersion.latest().major();
+
+    private static final ClassDesc CD_Arena = desc(Arena.class);
+    private static final ClassDesc CD_MemorySegment = desc(MemorySegment.class);
+    private static final ClassDesc CD_MemorySegment_Scope = desc(MemorySegment.Scope.class);
+    private static final ClassDesc CD_SharedUtils = desc(SharedUtils.class);
+    private static final ClassDesc CD_AbstractMemorySegmentImpl = desc(AbstractMemorySegmentImpl.class);
+    private static final ClassDesc CD_MemorySessionImpl = desc(MemorySessionImpl.class);
+    private static final ClassDesc CD_Utils = desc(Utils.class);
+    private static final ClassDesc CD_SegmentAllocator = desc(SegmentAllocator.class);
+    private static final ClassDesc CD_ValueLayout = desc(ValueLayout.class);
+    private static final ClassDesc CD_ValueLayout_OfBoolean = desc(ValueLayout.OfBoolean.class);
+    private static final ClassDesc CD_ValueLayout_OfByte = desc(ValueLayout.OfByte.class);
+    private static final ClassDesc CD_ValueLayout_OfShort = desc(ValueLayout.OfShort.class);
+    private static final ClassDesc CD_ValueLayout_OfChar = desc(ValueLayout.OfChar.class);
+    private static final ClassDesc CD_ValueLayout_OfInt = desc(ValueLayout.OfInt.class);
+    private static final ClassDesc CD_ValueLayout_OfLong = desc(ValueLayout.OfLong.class);
+    private static final ClassDesc CD_ValueLayout_OfFloat = desc(ValueLayout.OfFloat.class);
+    private static final ClassDesc CD_ValueLayout_OfDouble = desc(ValueLayout.OfDouble.class);
+    private static final ClassDesc CD_AddressLayout = desc(AddressLayout.class);
+
+    private static final MethodTypeDesc MTD_NEW_BOUNDED_ARENA = MethodTypeDesc.of(CD_Arena, CD_long);
+    private static final MethodTypeDesc MTD_NEW_EMPTY_ARENA = MethodTypeDesc.of(CD_Arena);
+    private static final MethodTypeDesc MTD_SCOPE = MethodTypeDesc.of(CD_MemorySegment_Scope);
+    private static final MethodTypeDesc MTD_SESSION_IMPL = MethodTypeDesc.of(CD_MemorySessionImpl);
+    private static final MethodTypeDesc MTD_CLOSE = MTD_void;
+    private static final MethodTypeDesc MTD_CHECK_NATIVE = MethodTypeDesc.of(CD_void, CD_MemorySegment);
+    private static final MethodTypeDesc MTD_UNSAFE_GET_BASE = MethodTypeDesc.of(CD_Object);
+    private static final MethodTypeDesc MTD_UNSAFE_GET_OFFSET = MethodTypeDesc.of(CD_long);
+    private static final MethodTypeDesc MTD_COPY = MethodTypeDesc.of(CD_void, CD_MemorySegment, CD_long, CD_MemorySegment, CD_long, CD_long);
+    private static final MethodTypeDesc MTD_LONG_TO_ADDRESS_NO_SCOPE = MethodTypeDesc.of(CD_MemorySegment, CD_long, CD_long, CD_long);
+    private static final MethodTypeDesc MTD_LONG_TO_ADDRESS_SCOPE = MethodTypeDesc.of(CD_MemorySegment, CD_long, CD_long, CD_long, CD_MemorySessionImpl);
+    private static final MethodTypeDesc MTD_ALLOCATE = MethodTypeDesc.of(CD_MemorySegment, CD_long, CD_long);
+    private static final MethodTypeDesc MTD_HANDLE_UNCAUGHT_EXCEPTION = MethodTypeDesc.of(CD_void, CD_Throwable);
+    private static final MethodTypeDesc MTD_RELEASE0 = MTD_void;
+    private static final MethodTypeDesc MTD_ACQUIRE0 = MTD_void;
+    private static final MethodTypeDesc MTD_INTEGER_TO_UNSIGNED_LONG = MethodTypeDesc.of(CD_long, CD_int);
+    private static final MethodTypeDesc MTD_SHORT_TO_UNSIGNED_LONG = MethodTypeDesc.of(CD_long, CD_short);
+    private static final MethodTypeDesc MTD_BYTE_TO_UNSIGNED_LONG = MethodTypeDesc.of(CD_long, CD_byte);
+    private static final MethodTypeDesc MTD_BYTE_TO_BOOLEAN = MethodTypeDesc.of(CD_boolean, CD_byte);
+
+    private static final ConstantDesc CLASS_DATA_DESC = DynamicConstantDesc.of(BSM_CLASS_DATA);
+
+    private static final String CLASS_NAME_DOWNCALL = "jdk/internal/foreign/abi/DowncallStub";
+    private static final String CLASS_NAME_UPCALL = "jdk/internal/foreign/abi/UpcallStub";
+    private static final String METHOD_NAME = "invoke";
+
+    // Instance fields start here
+    private final CodeBuilder cb;
+    private final MethodType callerMethodType;
+    private final CallingSequence callingSequence;
+    private final ABIDescriptor abi;
+    private final MethodType leafType;
+
+    private int[] leafArgSlots;
+    private int[] scopeSlots;
+    private int curScopeLocalIdx = -1;
+    private int returnAllocatorIdx = -1;
+    private int contextIdx = -1;
+    private int returnBufferIdx = -1;
+    private int retValIdx = -1;
+    private Deque<Class<?>> typeStack;
+    private List<Class<?>> leafArgTypes;
+    private int paramIndex;
+    private long retBufOffset; // for needsReturnBuffer
+
+    private BindingSpecializer(CodeBuilder cb, MethodType callerMethodType,
+                               CallingSequence callingSequence, ABIDescriptor abi, MethodType leafType) {
+        this.cb = cb;
+        this.callerMethodType = callerMethodType;
+        this.callingSequence = callingSequence;
+        this.abi = abi;
+        this.leafType = leafType;
+    }
+
+    static MethodHandle specializeDowncall(MethodHandle leafHandle, CallingSequence callingSequence, ABIDescriptor abi) {
+        MethodType callerMethodType = callingSequence.callerMethodType();
+        if (callingSequence.needsReturnBuffer()) {
+            callerMethodType = callerMethodType.dropParameterTypes(0, 1); // Return buffer does not appear in the parameter list
+        }
+        callerMethodType = callerMethodType.insertParameterTypes(0, SegmentAllocator.class);
+
+        byte[] bytes = specializeHelper(leafHandle.type(), callerMethodType, callingSequence, abi);
+
+        try {
+            MethodHandles.Lookup definedClassLookup = MethodHandles.lookup()
+                    .defineHiddenClassWithClassData(bytes, leafHandle, false);
+            return definedClassLookup.findStatic(definedClassLookup.lookupClass(), METHOD_NAME, callerMethodType);
+        } catch (IllegalAccessException | NoSuchMethodException e) {
+            throw new InternalError("Should not happen", e);
+        }
+    }
+
+    static MethodHandle specializeUpcall(MethodType targetType, CallingSequence callingSequence, ABIDescriptor abi) {
+        MethodType callerMethodType = callingSequence.callerMethodType();
+        callerMethodType = callerMethodType.insertParameterTypes(0, MethodHandle.class); // target
+
+        byte[] bytes = specializeHelper(targetType, callerMethodType, callingSequence, abi);
+
+        try {
+            // For upcalls, we must initialize the class since the upcall stubs don't have a clinit barrier,
+            // and the slow path in the c2i adapter we end up calling can not handle the particular code shape
+            // where the caller is an upcall stub.
+            MethodHandles.Lookup defineClassLookup = MethodHandles.lookup().defineHiddenClass(bytes, true);
+            return defineClassLookup.findStatic(defineClassLookup.lookupClass(), METHOD_NAME, callerMethodType);
+        } catch (IllegalAccessException | NoSuchMethodException e) {
+            throw new InternalError("Should not happen", e);
+        }
+    }
+
+    private static byte[] specializeHelper(MethodType leafType, MethodType callerMethodType,
+                                           CallingSequence callingSequence, ABIDescriptor abi) {
+        String className = callingSequence.forDowncall() ? CLASS_NAME_DOWNCALL : CLASS_NAME_UPCALL;
+        byte[] bytes = ClassFile.of().build(ClassDesc.ofInternalName(className), clb -> {
+            clb.withFlags(ACC_PUBLIC + ACC_FINAL + ACC_SUPER);
+            clb.withSuperclass(CD_Object);
+            clb.withVersion(CLASSFILE_VERSION, 0);
+
+            clb.withMethodBody(METHOD_NAME, desc(callerMethodType), ACC_PUBLIC | ACC_STATIC,
+                    cb -> new BindingSpecializer(cb, callerMethodType, callingSequence, abi, leafType).specialize());
+        });
+
+        if (DUMP_CLASSES_DIR != null) {
+            String fileName = className + escapeForFileName(callingSequence.functionDesc().toString()) + ".class";
+            Path dumpPath = Path.of(DUMP_CLASSES_DIR).resolve(fileName);
+            try {
+                Files.createDirectories(dumpPath.getParent());
+                Files.write(dumpPath, bytes);
+            } catch (IOException e) {
+                throw new InternalError(e);
+            }
+        }
+
+        if (PERFORM_VERIFICATION) {
+            List<VerifyError> errors = ClassFile.of().verify(bytes);
+            if (!errors.isEmpty()) {
+                errors.forEach(System.err::println);
+                throw new IllegalStateException("Verification error(s)");
+            }
+        }
+
+        return bytes;
+    }
+
+    private static String escapeForFileName(String str) {
+        StringBuilder sb = new StringBuilder(str.length());
+        for (int i = 0; i < str.length(); i++) {
+            char c = str.charAt(i);
+            sb.append(switch (c) {
+                case ' ' -> '_';
+                case '[', '<' -> '{';
+                case ']', '>' -> '}';
+                case '/', '\\', ':', '*', '?', '"', '|' -> '!'; // illegal in Windows file names.
+                default -> c;
+            });
+        }
+        return sb.toString();
+    }
+
+    // binding operand stack manipulation
+
+    private void pushType(Class<?> type) {
+        typeStack.push(type);
+    }
+
+    private Class<?> popType(Class<?> expected) {
+        Class<?> found = typeStack.pop();
+        if (!expected.equals(found)) {
+            throw new IllegalStateException(
+                    String.format("Invalid type on binding operand stack; found %s - expected %s",
+                            found.descriptorString(), expected.descriptorString()));
+        }
+        return found;
+    }
+
+    // specialization
+
+    private void specialize() {
+        // slots that store the output arguments (passed to the leaf handle)
+        leafArgSlots = new int[leafType.parameterCount()];
+        for (int i = 0; i < leafType.parameterCount(); i++) {
+            leafArgSlots[i] = cb.allocateLocal(TypeKind.from(leafType.parameterType(i)));
+        }
+
+        // allocator passed to us for allocating the return MS (downcalls only)
+        if (callingSequence.forDowncall()) {
+            returnAllocatorIdx = 0; // first param
+
+            // for downcalls we also acquire/release scoped parameters before/after the call
+            // create a bunch of locals here to keep track of their scopes (to release later)
+            int[] initialScopeSlots = new int[callerMethodType.parameterCount()];
+            int numScopes = 0;
+            for (int i = 0; i < callerMethodType.parameterCount(); i++) {
+                if (shouldAcquire(i)) {
+                    int scopeLocal = cb.allocateLocal(ReferenceType);
+                    initialScopeSlots[numScopes++] = scopeLocal;
+                    cb.loadConstant(null);
+                    cb.storeLocal(ReferenceType, scopeLocal); // need to initialize all scope locals here in case an exception occurs
+                }
+            }
+            scopeSlots = Arrays.copyOf(initialScopeSlots, numScopes); // fit to size
+            curScopeLocalIdx = 0; // used from emitGetInput
+        }
+
+        // create a Binding.Context for this call
+        if (callingSequence.allocationSize() != 0) {
+            cb.loadConstant(callingSequence.allocationSize());
+            cb.invokestatic(CD_SharedUtils, "newBoundedArena", MTD_NEW_BOUNDED_ARENA);
+        } else if (callingSequence.forUpcall() && needsSession()) {
+            cb.invokestatic(CD_SharedUtils, "newEmptyArena", MTD_NEW_EMPTY_ARENA);
+        } else {
+            cb.getstatic(CD_SharedUtils, "DUMMY_ARENA", CD_Arena);
+        }
+        contextIdx = cb.allocateLocal(ReferenceType);
+        cb.storeLocal(ReferenceType, contextIdx);
+
+        // in case the call needs a return buffer, allocate it here.
+        // for upcalls the VM wrapper stub allocates the buffer.
+        if (callingSequence.needsReturnBuffer() && callingSequence.forDowncall()) {
+            emitLoadInternalAllocator();
+            emitAllocateCall(callingSequence.returnBufferSize(), 1);
+            returnBufferIdx = cb.allocateLocal(ReferenceType);
+            cb.storeLocal(ReferenceType, returnBufferIdx);
+        }
+
+        Label tryStart = cb.newLabel();
+        Label tryEnd = cb.newLabel();
+        Label catchStart = cb.newLabel();
+
+        cb.labelBinding(tryStart);
+
+        // stack to keep track of types on the bytecode stack between bindings.
+        // this is needed to e.g. emit the right DUP instruction,
+        // but also used for type checking.
+        typeStack = new ArrayDeque<>();
+        // leaf arg types are the types of the args passed to the leaf handle.
+        // these are collected from VM_STORE instructions for downcalls, and
+        // recipe outputs for upcalls (see uses emitSetOutput for both)
+        leafArgTypes = new ArrayList<>();
+        paramIndex = 1; // +1 to skip SegmentAllocator or MethodHandle
+        for (int i = 0; i < callingSequence.argumentBindingsCount(); i++) {
+            if (callingSequence.forDowncall()) {
+                // for downcalls, recipes have an input value, which we set up here
+                if (callingSequence.needsReturnBuffer() && i == 0) {
+                    assert returnBufferIdx != -1;
+                    cb.loadLocal(ReferenceType, returnBufferIdx);
+                    pushType(MemorySegment.class);
+                } else {
+                    emitGetInput();
+                }
+            }
+
+            // emit code according to binding recipe
+            doBindings(callingSequence.argumentBindings(i));
+
+            if (callingSequence.forUpcall()) {
+                // for upcalls, recipes have a result, which we handle here
+                if (callingSequence.needsReturnBuffer() && i == 0) {
+                    // return buffer ptr is wrapped in a MemorySegment above, but not passed to the leaf handle
+                    popType(MemorySegment.class);
+                    returnBufferIdx = cb.allocateLocal(ReferenceType);
+                    cb.storeLocal(ReferenceType, returnBufferIdx);
+                } else {
+                    // for upcalls the recipe result is an argument to the leaf handle
+                    emitSetOutput(typeStack.pop());
+                }
+            }
+            assert typeStack.isEmpty();
+        }
+
+        assert leafArgTypes.equals(leafType.parameterList());
+
+        // load the leaf MethodHandle
+        if (callingSequence.forDowncall()) {
+            cb.loadConstant(CLASS_DATA_DESC);
+        } else {
+            cb.loadLocal(ReferenceType, 0); // load target arg
+        }
+        cb.checkcast(CD_MethodHandle);
+        // load all the leaf args
+        for (int i = 0; i < leafArgSlots.length; i++) {
+            cb.loadLocal(TypeKind.from(leafArgTypes.get(i)), leafArgSlots[i]);
+        }
+        // call leaf MH
+        cb.invokevirtual(CD_MethodHandle, "invokeExact", desc(leafType));
+
+        // for downcalls, store the result of the leaf handle call away, until
+        // it is requested by a VM_LOAD in the return recipe.
+        if (callingSequence.forDowncall() && leafType.returnType() != void.class) {
+            emitSaveReturnValue(leafType.returnType());
+        }
+        // for upcalls we leave the return value on the stack to be picked up
+        // as an input of the return recipe.
+
+        // return value processing
+        if (callingSequence.hasReturnBindings()) {
+            if (callingSequence.forUpcall()) {
+                pushType(leafType.returnType());
+            }
+
+            retBufOffset = 0; // offset for reading from return buffer
+            doBindings(callingSequence.returnBindings());
+
+            if (callingSequence.forUpcall() && !callingSequence.needsReturnBuffer()) {
+                // was VM_STOREd somewhere in the bindings
+                emitRestoreReturnValue(callerMethodType.returnType());
+            }
+            cb.labelBinding(tryEnd);
+            // finally
+            emitCleanup();
+
+            if (callerMethodType.returnType() == void.class) {
+                // The case for upcalls that return by return buffer
+                assert typeStack.isEmpty();
+                cb.return_();
+            } else {
+                popType(callerMethodType.returnType());
+                assert typeStack.isEmpty();
+                cb.return_(TypeKind.from(callerMethodType.returnType()));
+            }
+        } else {
+            assert callerMethodType.returnType() == void.class;
+            assert typeStack.isEmpty();
+            cb.labelBinding(tryEnd);
+            // finally
+            emitCleanup();
+            cb.return_();
+        }
+
+        cb.labelBinding(catchStart);
+        // finally
+        emitCleanup();
+        if (callingSequence.forDowncall()) {
+            cb.athrow();
+        } else {
+            cb.invokestatic(CD_SharedUtils, "handleUncaughtException", MTD_HANDLE_UNCAUGHT_EXCEPTION);
+            if (callerMethodType.returnType() != void.class) {
+                TypeKind returnTypeKind = TypeKind.from(callerMethodType.returnType());
+                emitConstZero(returnTypeKind);
+                cb.return_(returnTypeKind);
+            } else {
+                cb.return_();
+            }
+        }
+
+        cb.exceptionCatchAll(tryStart, tryEnd, catchStart);
+    }
+
+    private boolean needsSession() {
+        return callingSequence.argumentBindings()
+                .filter(BoxAddress.class::isInstance)
+                .map(BoxAddress.class::cast)
+                .anyMatch(BoxAddress::needsScope);
+    }
+
+    private boolean shouldAcquire(int paramIndex) {
+        if (!callingSequence.forDowncall() || // we only acquire in downcalls
+                paramIndex == 0) { // the first parameter in a downcall is SegmentAllocator
+            return false;
+        }
+
+        // if call needs return buffer, the descriptor has an extra leading layout
+        int offset = callingSequence.needsReturnBuffer() ? 0 : 1;
+        MemoryLayout paramLayout =  callingSequence.functionDesc()
+                                              .argumentLayouts()
+                                              .get(paramIndex - offset);
+
+        // is this an address layout?
+        return paramLayout instanceof AddressLayout;
+    }
+
+    private void emitCleanup() {
+        emitCloseContext();
+        if (callingSequence.forDowncall()) {
+            emitReleaseScopes();
+        }
+    }
+
+    private void doBindings(List<Binding> bindings) {
+        for (Binding binding : bindings) {
+            switch (binding) {
+                case VMStore vmStore             -> emitVMStore(vmStore);
+                case VMLoad vmLoad               -> emitVMLoad(vmLoad);
+                case BufferStore bufferStore     -> emitBufferStore(bufferStore);
+                case BufferLoad bufferLoad       -> emitBufferLoad(bufferLoad);
+                case Copy copy                   -> emitCopyBuffer(copy);
+                case Allocate allocate           -> emitAllocBuffer(allocate);
+                case BoxAddress boxAddress       -> emitBoxAddress(boxAddress);
+                case SegmentBase unused          -> emitSegmentBase();
+                case SegmentOffset segmentOffset -> emitSegmentOffset(segmentOffset);
+                case Dup unused                  -> emitDupBinding();
+                case ShiftLeft shiftLeft         -> emitShiftLeft(shiftLeft);
+                case ShiftRight shiftRight       -> emitShiftRight(shiftRight);
+                case Cast cast                   -> emitCast(cast);
+            }
+        }
+    }
+
+    private void emitSetOutput(Class<?> storeType) {
+        cb.storeLocal(TypeKind.from(storeType), leafArgSlots[leafArgTypes.size()]);
+        leafArgTypes.add(storeType);
+    }
+
+    private void emitGetInput() {
+        Class<?> highLevelType = callerMethodType.parameterType(paramIndex);
+        cb.loadLocal(TypeKind.from(highLevelType), cb.parameterSlot(paramIndex));
+
+        if (shouldAcquire(paramIndex)) {
+            cb.dup();
+            emitAcquireScope();
+        }
+
+        pushType(highLevelType);
+        paramIndex++;
+    }
+
+    private void emitAcquireScope() {
+        cb.checkcast(CD_AbstractMemorySegmentImpl);
+        cb.invokevirtual(CD_AbstractMemorySegmentImpl, "sessionImpl", MTD_SESSION_IMPL);
+        Label skipAcquire = cb.newLabel();
+        Label end = cb.newLabel();
+
+        // start with 1 scope to maybe acquire on the stack
+        assert curScopeLocalIdx != -1;
+        boolean hasOtherScopes = curScopeLocalIdx != 0;
+        for (int i = 0; i < curScopeLocalIdx; i++) {
+            cb.dup(); // dup for comparison
+            cb.loadLocal(ReferenceType, scopeSlots[i]);
+            cb.if_acmpeq(skipAcquire);
+        }
+
+        // 1 scope to acquire on the stack
+        cb.dup();
+        int nextScopeLocal = scopeSlots[curScopeLocalIdx++];
+        // call acquire first here. So that if it fails, we don't call release
+        cb.invokevirtual(CD_MemorySessionImpl, "acquire0", MTD_ACQUIRE0); // call acquire on the other
+        cb.storeLocal(ReferenceType, nextScopeLocal); // store off one to release later
+
+        if (hasOtherScopes) { // avoid ASM generating a bunch of nops for the dead code
+            cb.goto_(end);
+
+            cb.labelBinding(skipAcquire);
+            cb.pop(); // drop scope
+        }
+
+        cb.labelBinding(end);
+    }
+
+    private void emitReleaseScopes() {
+        for (int scopeLocal : scopeSlots) {
+            cb.loadLocal(ReferenceType, scopeLocal);
+            cb.ifThen(Opcode.IFNONNULL, ifCb -> {
+                ifCb.loadLocal(ReferenceType, scopeLocal);
+                ifCb.invokevirtual(CD_MemorySessionImpl, "release0", MTD_RELEASE0);
+            });
+        }
+    }
+
+    private void emitSaveReturnValue(Class<?> storeType) {
+        TypeKind typeKind = TypeKind.from(storeType);
+        retValIdx = cb.allocateLocal(typeKind);
+        cb.storeLocal(typeKind, retValIdx);
+    }
+
+    private void emitRestoreReturnValue(Class<?> loadType) {
+        assert retValIdx != -1;
+        cb.loadLocal(TypeKind.from(loadType), retValIdx);
+        pushType(loadType);
+    }
+
+    private void emitLoadInternalSession() {
+        assert contextIdx != -1;
+        cb.loadLocal(ReferenceType, contextIdx);
+        cb.checkcast(CD_Arena);
+        cb.invokeinterface(CD_Arena, "scope", MTD_SCOPE);
+        cb.checkcast(CD_MemorySessionImpl);
+    }
+
+    private void emitLoadInternalAllocator() {
+        assert contextIdx != -1;
+        cb.loadLocal(ReferenceType, contextIdx);
+    }
+
+    private void emitCloseContext() {
+        assert contextIdx != -1;
+        cb.loadLocal(ReferenceType, contextIdx);
+        cb.checkcast(CD_Arena);
+        cb.invokeinterface(CD_Arena, "close", MTD_CLOSE);
+    }
+
+    private void emitBoxAddress(BoxAddress boxAddress) {
+        popType(long.class);
+        cb.loadConstant(boxAddress.size());
+        cb.loadConstant(boxAddress.align());
+        if (needsSession()) {
+            emitLoadInternalSession();
+            cb.invokestatic(CD_Utils, "longToAddress", MTD_LONG_TO_ADDRESS_SCOPE);
+        } else {
+            cb.invokestatic(CD_Utils, "longToAddress", MTD_LONG_TO_ADDRESS_NO_SCOPE);
+        }
+        pushType(MemorySegment.class);
+    }
+
+    private void emitAllocBuffer(Allocate binding) {
+        if (callingSequence.forDowncall()) {
+            assert returnAllocatorIdx != -1;
+            cb.loadLocal(ReferenceType, returnAllocatorIdx);
+        } else {
+            emitLoadInternalAllocator();
+        }
+        emitAllocateCall(binding.size(), binding.alignment());
+        pushType(MemorySegment.class);
+    }
+
+    private void emitBufferStore(BufferStore bufferStore) {
+        Class<?> storeType = bufferStore.type();
+        TypeKind storeTypeKind = TypeKind.from(storeType);
+        long offset = bufferStore.offset();
+        int byteWidth = bufferStore.byteWidth();
+
+        popType(storeType);
+        popType(MemorySegment.class);
+
+        if (SharedUtils.isPowerOfTwo(byteWidth)) {
+            int valueIdx = cb.allocateLocal(storeTypeKind);
+            cb.storeLocal(storeTypeKind, valueIdx);
+
+            ClassDesc valueLayoutType = emitLoadLayoutConstant(storeType);
+            cb.loadConstant(offset);
+            cb.loadLocal(storeTypeKind, valueIdx);
+            MethodTypeDesc descriptor = MethodTypeDesc.of(CD_void, valueLayoutType, CD_long, desc(storeType));
+            cb.invokeinterface(CD_MemorySegment, "set", descriptor);
+        } else {
+            // long longValue = ((Number) value).longValue();
+            if (storeType == int.class) {
+                cb.i2l();
+            } else {
+                assert storeType == long.class; // chunking only for int and long
+            }
+            int longValueIdx = cb.allocateLocal(LongType);
+            cb.storeLocal(LongType, longValueIdx);
+            int writeAddrIdx = cb.allocateLocal(ReferenceType);
+            cb.storeLocal(ReferenceType, writeAddrIdx);
+
+            int remaining = byteWidth;
+            int chunkOffset = 0;
+            do {
+                int chunkSize = Integer.highestOneBit(remaining); // next power of 2, in bytes
+                Class<?> chunkStoreType;
+                long mask;
+                switch (chunkSize) {
+                    case Integer.BYTES -> {
+                        chunkStoreType = int.class;
+                        mask = 0xFFFF_FFFFL;
+                    }
+                    case Short.BYTES -> {
+                        chunkStoreType = short.class;
+                        mask = 0xFFFFL;
+                    }
+                    case Byte.BYTES -> {
+                        chunkStoreType = byte.class;
+                        mask = 0xFFL;
+                    }
+                    default ->
+                       throw new IllegalStateException("Unexpected chunk size for chunked write: " + chunkSize);
+                }
+                //int writeChunk = (int) (((0xFFFF_FFFFL << shiftAmount) & longValue) >>> shiftAmount);
+                int shiftAmount = chunkOffset * Byte.SIZE;
+                mask = mask << shiftAmount;
+                cb.loadLocal(LongType, longValueIdx);
+                cb.loadConstant(mask);
+                cb.land();
+                if (shiftAmount != 0) {
+                    cb.loadConstant(shiftAmount);
+                    cb.lushr();
+                }
+                cb.l2i();
+                TypeKind chunkStoreTypeKind = TypeKind.from(chunkStoreType);
+                int chunkIdx = cb.allocateLocal(chunkStoreTypeKind);
+                cb.storeLocal(chunkStoreTypeKind, chunkIdx);
+                // chunk done, now write it
+
+                //writeAddress.set(JAVA_SHORT_UNALIGNED, offset, writeChunk);
+                cb.loadLocal(ReferenceType, writeAddrIdx);
+                ClassDesc valueLayoutType = emitLoadLayoutConstant(chunkStoreType);
+                long writeOffset = offset + SharedUtils.pickChunkOffset(chunkOffset, byteWidth, chunkSize);
+                cb.loadConstant(writeOffset);
+                cb.loadLocal(chunkStoreTypeKind, chunkIdx);
+                MethodTypeDesc descriptor = MethodTypeDesc.of(CD_void, valueLayoutType, CD_long, desc(chunkStoreType));
+                cb.invokeinterface(CD_MemorySegment, "set", descriptor);
+
+                remaining -= chunkSize;
+                chunkOffset += chunkSize;
+            } while (remaining != 0);
+        }
+    }
+
+    // VM_STORE and VM_LOAD are emulated, which is different for down/upcalls
+    private void emitVMStore(VMStore vmStore) {
+        Class<?> storeType = vmStore.type();
+        TypeKind storeTypeKind = TypeKind.from(storeType);
+        popType(storeType);
+
+        if (callingSequence.forDowncall()) {
+            // processing arg
+            emitSetOutput(storeType);
+        } else {
+            // processing return
+            if (!callingSequence.needsReturnBuffer()) {
+                emitSaveReturnValue(storeType);
+            } else {
+                int valueIdx = cb.allocateLocal(storeTypeKind);
+                cb.storeLocal(storeTypeKind, valueIdx); // store away the stored value, need it later
+
+                assert returnBufferIdx != -1;
+                cb.loadLocal(ReferenceType, returnBufferIdx);
+                ClassDesc valueLayoutType = emitLoadLayoutConstant(storeType);
+                cb.loadConstant(retBufOffset);
+                cb.loadLocal(storeTypeKind, valueIdx);
+                MethodTypeDesc descriptor = MethodTypeDesc.of(CD_void, valueLayoutType, CD_long, desc(storeType));
+                cb.invokeinterface(CD_MemorySegment, "set", descriptor);
+                retBufOffset += abi.arch.typeSize(vmStore.storage().type());
+            }
+        }
+    }
+
+    private void emitVMLoad(VMLoad vmLoad) {
+        Class<?> loadType = vmLoad.type();
+
+        if (callingSequence.forDowncall()) {
+            // processing return
+            if (!callingSequence.needsReturnBuffer()) {
+                emitRestoreReturnValue(loadType);
+            } else {
+                assert returnBufferIdx != -1;
+                cb.loadLocal(ReferenceType, returnBufferIdx);
+                ClassDesc valueLayoutType = emitLoadLayoutConstant(loadType);
+                cb.loadConstant(retBufOffset);
+                MethodTypeDesc descriptor = MethodTypeDesc.of(desc(loadType), valueLayoutType, CD_long);
+                cb.invokeinterface(CD_MemorySegment, "get", descriptor);
+                retBufOffset += abi.arch.typeSize(vmLoad.storage().type());
+                pushType(loadType);
+            }
+        } else {
+            // processing arg
+            emitGetInput();
+        }
+    }
+
+    private void emitDupBinding() {
+        Class<?> dupType = typeStack.peek();
+        emitDup(dupType);
+        pushType(dupType);
+    }
+
+    private void emitShiftLeft(ShiftLeft shiftLeft) {
+        popType(long.class);
+        cb.loadConstant(shiftLeft.shiftAmount() * Byte.SIZE);
+        cb.lshl();
+        pushType(long.class);
+    }
+
+    private void emitShiftRight(ShiftRight shiftRight) {
+        popType(long.class);
+        cb.loadConstant(shiftRight.shiftAmount() * Byte.SIZE);
+        cb.lushr();
+        pushType(long.class);
+    }
+
+    private void emitCast(Cast cast) {
+        Class<?> fromType = cast.fromType();
+        Class<?> toType = cast.toType();
+
+        popType(fromType);
+        switch (cast) {
+            case INT_TO_BOOLEAN -> {
+                // implement least significant byte non-zero test
+
+                // select first byte
+                cb.loadConstant(0xFF);
+                cb.iand();
+
+                // convert to boolean
+                cb.invokestatic(CD_Utils, "byteToBoolean", MTD_BYTE_TO_BOOLEAN);
+            }
+            case INT_TO_BYTE -> cb.i2b();
+            case INT_TO_CHAR -> cb.i2c();
+            case INT_TO_SHORT -> cb.i2s();
+            case BYTE_TO_LONG, CHAR_TO_LONG, SHORT_TO_LONG, INT_TO_LONG -> cb.i2l();
+            case LONG_TO_BYTE -> { cb.l2i(); cb.i2b(); }
+            case LONG_TO_SHORT -> { cb.l2i(); cb.i2s(); }
+            case LONG_TO_CHAR -> { cb.l2i(); cb.i2c(); }
+            case LONG_TO_INT -> cb.l2i();
+            case BOOLEAN_TO_INT, BYTE_TO_INT, CHAR_TO_INT, SHORT_TO_INT -> {
+                // no-op in bytecode
+            }
+            default -> throw new IllegalStateException("Unknown cast: " + cast);
+        }
+        pushType(toType);
+    }
+
+    private void emitSegmentBase() {
+        popType(MemorySegment.class);
+        cb.checkcast(CD_AbstractMemorySegmentImpl);
+        cb.invokevirtual(CD_AbstractMemorySegmentImpl, "unsafeGetBase", MTD_UNSAFE_GET_BASE);
+        pushType(Object.class);
+    }
+
+    private void emitSegmentOffset(SegmentOffset segmentOffset) {
+        popType(MemorySegment.class);
+
+        if (!segmentOffset.allowHeap()) {
+            cb.dup();
+            cb.invokestatic(CD_SharedUtils, "checkNative", MTD_CHECK_NATIVE);
+        }
+        cb.checkcast(CD_AbstractMemorySegmentImpl);
+        cb.invokevirtual(CD_AbstractMemorySegmentImpl, "unsafeGetOffset", MTD_UNSAFE_GET_OFFSET);
+
+        pushType(long.class);
+    }
+
+    private void emitBufferLoad(BufferLoad bufferLoad) {
+        Class<?> loadType = bufferLoad.type();
+        long offset = bufferLoad.offset();
+        int byteWidth = bufferLoad.byteWidth();
+
+        popType(MemorySegment.class);
+
+        if (SharedUtils.isPowerOfTwo(byteWidth)) {
+            ClassDesc valueLayoutType = emitLoadLayoutConstant(loadType);
+            cb.loadConstant(offset);
+            MethodTypeDesc descriptor = MethodTypeDesc.of(desc(loadType), valueLayoutType, CD_long);
+            cb.invokeinterface(CD_MemorySegment, "get", descriptor);
+        } else {
+            // chunked
+            int readAddrIdx = cb.allocateLocal(ReferenceType);
+            cb.storeLocal(ReferenceType, readAddrIdx);
+
+            cb.loadConstant(0L); // result
+            int resultIdx = cb.allocateLocal(LongType);
+            cb.storeLocal(LongType, resultIdx);
+
+            int remaining = byteWidth;
+            int chunkOffset = 0;
+            do {
+                int chunkSize = Integer.highestOneBit(remaining); // next power of 2
+                Class<?> chunkType;
+                ClassDesc toULongHolder;
+                MethodTypeDesc toULongDescriptor;
+                switch (chunkSize) {
+                    case Integer.BYTES -> {
+                        chunkType = int.class;
+                        toULongHolder = CD_Integer;
+                        toULongDescriptor = MTD_INTEGER_TO_UNSIGNED_LONG;
+                    }
+                    case Short.BYTES -> {
+                        chunkType = short.class;
+                        toULongHolder = CD_Short;
+                        toULongDescriptor = MTD_SHORT_TO_UNSIGNED_LONG;
+                    }
+                    case Byte.BYTES -> {
+                        chunkType = byte.class;
+                        toULongHolder = CD_Byte;
+                        toULongDescriptor = MTD_BYTE_TO_UNSIGNED_LONG;
+                    }
+                    default ->
+                        throw new IllegalStateException("Unexpected chunk size for chunked write: " + chunkSize);
+                }
+                // read from segment
+                cb.loadLocal(ReferenceType, readAddrIdx);
+                ClassDesc valueLayoutType = emitLoadLayoutConstant(chunkType);
+                MethodTypeDesc descriptor = MethodTypeDesc.of(desc(chunkType), valueLayoutType, CD_long);
+                long readOffset = offset + SharedUtils.pickChunkOffset(chunkOffset, byteWidth, chunkSize);
+                cb.loadConstant(readOffset);
+                cb.invokeinterface(CD_MemorySegment, "get", descriptor);
+                cb.invokestatic(toULongHolder, "toUnsignedLong", toULongDescriptor);
+
+                // shift to right offset
+                int shiftAmount = chunkOffset * Byte.SIZE;
+                if (shiftAmount != 0) {
+                    cb.loadConstant(shiftAmount);
+                    cb.lshl();
+                }
+                // add to result
+                cb.loadLocal(LongType, resultIdx);
+                cb.lor();
+                cb.storeLocal(LongType, resultIdx);
+
+                remaining -= chunkSize;
+                chunkOffset += chunkSize;
+            } while (remaining != 0);
+
+            cb.loadLocal(LongType, resultIdx);
+            if (loadType == int.class) {
+                cb.l2i();
+            } else {
+                assert loadType == long.class; // should not have chunking for other types
+            }
+        }
+
+        pushType(loadType);
+    }
+
+    private void emitCopyBuffer(Copy copy) {
+        long size = copy.size();
+        long alignment = copy.alignment();
+
+        popType(MemorySegment.class);
+
+        // operand/srcSegment is on the stack
+        // generating a call to:
+        //   MemorySegment::copy(MemorySegment srcSegment, long srcOffset, MemorySegment dstSegment, long dstOffset, long bytes)
+        cb.loadConstant(0L);
+        // create the dstSegment by allocating it. Similar to:
+        //   context.allocator().allocate(size, alignment)
+        emitLoadInternalAllocator();
+        emitAllocateCall(size, alignment);
+        cb.dup();
+        int storeIdx = cb.allocateLocal(ReferenceType);
+        cb.storeLocal(ReferenceType, storeIdx);
+        cb.loadConstant(0L);
+        cb.loadConstant(size);
+        cb.invokestatic(CD_MemorySegment, "copy", MTD_COPY, true);
+
+        cb.loadLocal(ReferenceType, storeIdx);
+        pushType(MemorySegment.class);
+    }
+
+    private void emitAllocateCall(long size, long alignment) {
+        cb.loadConstant(size);
+        cb.loadConstant(alignment);
+        cb.invokeinterface(CD_SegmentAllocator, "allocate", MTD_ALLOCATE);
+    }
+
+    private ClassDesc emitLoadLayoutConstant(Class<?> type) {
+        ClassDesc valueLayoutType = valueLayoutTypeFor(type);
+        String valueLayoutConstantName = valueLayoutConstantFor(type);
+        cb.getstatic(CD_ValueLayout, valueLayoutConstantName, valueLayoutType);
+        return valueLayoutType;
+    }
+
+    private static String valueLayoutConstantFor(Class<?> type) {
+        if (type == boolean.class) {
+            return "JAVA_BOOLEAN";
+        } else if (type == byte.class) {
+            return "JAVA_BYTE";
+        } else if (type == short.class) {
+            return "JAVA_SHORT_UNALIGNED";
+        } else if (type == char.class) {
+            return "JAVA_CHAR_UNALIGNED";
+        } else if (type == int.class) {
+            return "JAVA_INT_UNALIGNED";
+        } else if (type == long.class) {
+            return "JAVA_LONG_UNALIGNED";
+        } else if (type == float.class) {
+            return "JAVA_FLOAT_UNALIGNED";
+        } else if (type == double.class) {
+            return "JAVA_DOUBLE_UNALIGNED";
+        } else if (type == MemorySegment.class) {
+            return "ADDRESS_UNALIGNED";
+        } else {
+            throw new IllegalStateException("Unknown type: " + type);
+        }
+    }
+
+    private static ClassDesc valueLayoutTypeFor(Class<?> type) {
+        if (type == boolean.class) {
+            return CD_ValueLayout_OfBoolean;
+        } else if (type == byte.class) {
+            return CD_ValueLayout_OfByte;
+        } else if (type == short.class) {
+            return CD_ValueLayout_OfShort;
+        } else if (type == char.class) {
+            return CD_ValueLayout_OfChar;
+        } else if (type == int.class) {
+            return CD_ValueLayout_OfInt;
+        } else if (type == long.class) {
+            return CD_ValueLayout_OfLong;
+        } else if (type == float.class) {
+            return CD_ValueLayout_OfFloat;
+        } else if (type == double.class) {
+            return CD_ValueLayout_OfDouble;
+        } else if (type == MemorySegment.class) {
+            return CD_AddressLayout;
+        } else {
+            throw new IllegalStateException("Unknown type: " + type);
+        }
+    }
+
+    private void emitDup(Class<?> type) {
+        if (type == double.class || type == long.class) {
+            cb.dup2();
+        } else {
+            cb.dup();
+        }
+    }
+
+    /*
+     * Low-level emit helpers.
+     */
+
+    private void emitConstZero(TypeKind kind) {
+        switch (kind) {
+            case BooleanType, ByteType, ShortType, CharType, IntType -> cb.iconst_0();
+            case LongType -> cb.lconst_0();
+            case FloatType -> cb.fconst_0();
+            case DoubleType -> cb.dconst_0();
+            case ReferenceType -> cb.aconst_null();
+        }
+    }
+
+    @SuppressWarnings("unchecked")
+    private static <T> T desc(Constable c) {
+        return (T) c.describeConstable().orElseThrow();
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/foreign/abi/CallingSequence.class b/tests/test_data/std/jdk/internal/foreign/abi/CallingSequence.class
new file mode 100644
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diff --git a/tests/test_data/std/jdk/internal/foreign/abi/CallingSequence.java b/tests/test_data/std/jdk/internal/foreign/abi/CallingSequence.java
new file mode 100644
index 00000000..e301f692
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/foreign/abi/CallingSequence.java
@@ -0,0 +1,220 @@
+/*
+ * Copyright (c) 2020, 2023, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package jdk.internal.foreign.abi;
+
+import java.lang.foreign.FunctionDescriptor;
+
+import java.lang.invoke.MethodType;
+import java.util.List;
+import java.util.stream.Stream;
+
+public class CallingSequence {
+    private final boolean forUpcall;
+    private final MethodType callerMethodType;
+    private final MethodType calleeMethodType;
+    private final FunctionDescriptor desc;
+    private final boolean needsReturnBuffer;
+    private final long returnBufferSize;
+    private final long allocationSize;
+
+    private final List<Binding> returnBindings;
+    private final List<List<Binding>> argumentBindings;
+
+    private final LinkerOptions linkerOptions;
+
+    public CallingSequence(boolean forUpcall, MethodType callerMethodType, MethodType calleeMethodType, FunctionDescriptor desc,
+                           boolean needsReturnBuffer, long returnBufferSize, long allocationSize,
+                           List<List<Binding>> argumentBindings, List<Binding> returnBindings,
+                           LinkerOptions linkerOptions) {
+        this.forUpcall = forUpcall;
+        this.callerMethodType = callerMethodType;
+        this.calleeMethodType = calleeMethodType;
+        this.desc = desc;
+        this.needsReturnBuffer = needsReturnBuffer;
+        this.returnBufferSize = returnBufferSize;
+        this.allocationSize = allocationSize;
+        this.returnBindings = returnBindings;
+        this.argumentBindings = argumentBindings;
+        this.linkerOptions = linkerOptions;
+    }
+
+    /**
+     * An important distinction is that downcalls have 1 recipe per caller parameter and
+     * each callee parameter corresponds to a VM_STORE. Upcalls have 1 recipe per callee parameter and
+     * each caller parameter corresponds to a VM_LOAD.
+     *
+     * The VM_STOREs are then implemented by the leaf handle for downcalls, and vice versa, the wrapper
+     * stub that wraps an upcall handle implements the VM_LOADS. In both cases the register values are
+     * communicated through Java primitives.
+     *
+     * The 'argumentBindingsCount' below corresponds to the number of recipes, so it is the
+     * caller parameter count for downcalls, and the callee parameter count for upcalls.
+     *
+     * @return the number of binding recipes in this calling sequence
+     */
+    public int argumentBindingsCount() {
+        return argumentBindings.size();
+    }
+
+    public List<Binding> argumentBindings(int i) {
+        return argumentBindings.get(i);
+    }
+
+    public Stream<Binding> argumentBindings() {
+        return argumentBindings.stream().flatMap(List::stream);
+    }
+
+    public List<Binding> returnBindings() {
+        return returnBindings;
+    }
+
+    public boolean forUpcall() {
+        return forUpcall;
+    }
+
+    public boolean forDowncall() {
+        return !forUpcall;
+    }
+
+    /**
+     * Returns the caller method type, which is the high-level method type
+     * for downcalls (the type of the downcall method handle)
+     * and the low-level method type (all primitives, VM facing) for upcalls.
+     *
+     * Note that for downcalls a single parameter in this method type corresponds
+     * to a single argument binding recipe in this calling sequence, but it may
+     * correspond to multiple parameters in the callee method type (for instance
+     * if a struct is split into multiple register values).
+     *
+     * @return the caller method type.
+     */
+    public MethodType callerMethodType() {
+        return callerMethodType;
+    }
+
+    /**
+     * Returns the callee method type, which is the low-level method type
+     * (all primitives, VM facing) for downcalls and the high-level method type
+     * for upcalls (also the method type of the user-supplied target MH).
+     *
+     * Note that for upcalls a single parameter in this method type corresponds
+     * to a single argument binding recipe in this calling sequence, but it may
+     * correspond to multiple parameters in the caller method type (for instance
+     * if a struct is reconstructed from multiple register values).
+     *
+     * @return the callee method type.
+     */
+    public MethodType calleeMethodType() {
+        return calleeMethodType;
+    }
+
+    public FunctionDescriptor functionDesc() {
+        return desc;
+    }
+
+    /**
+     * Whether this calling sequence needs a return buffer.
+     *
+     * A return buffer is used to support functions that  return values
+     * in multiple registers, which is not possible to do just with Java primitives
+     * (we can only return 1 value in Java, meaning only 1 register value).
+     *
+     * To emulate these multi-register returns, we instead use a pre-allocated buffer
+     * (the return buffer) from/into which the return values are loaded/stored.
+     *
+     * For downcalls, we allocate the buffer in Java code, and pass the address down
+     * to the VM stub, which stores the returned register values into this buffer.
+     * VM_LOADs in the binding recipe for the return value then load the value from this buffer.
+     *
+     * For upcalls, the VM stub allocates a buffer (on the stack), and passes the address
+     * to the Java method handle it calls. VM_STOREs in the return binding recipe then
+     * store values into this buffer, after which the VM stub moves the values from the buffer
+     * into the right register.
+     *
+     * @return whether this calling sequence needs a return buffer.
+     */
+    public boolean needsReturnBuffer() {
+        return needsReturnBuffer;
+    }
+
+    /**
+     * The size of the return buffer, if one is needed.
+     *
+     * @see #needsReturnBuffer
+     *
+     * @return the return buffer size
+     */
+    public long returnBufferSize() {
+        return returnBufferSize;
+    }
+
+    /**
+     * The amount of bytes this calling sequence needs to allocate during an invocation.
+     *
+     * Includes the return buffer size as well as space for any buffer copies in the recipes.
+     *
+     * @return the allocation size
+     */
+    public long allocationSize() {
+        return allocationSize;
+    }
+
+    public boolean hasReturnBindings() {
+        return !returnBindings.isEmpty();
+    }
+
+    public int capturedStateMask() {
+        return linkerOptions.capturedCallState()
+                .mapToInt(CapturableState::mask)
+                .reduce(0, (a, b) -> a | b);
+    }
+
+    public boolean needsTransition() {
+        return !linkerOptions.isCritical();
+    }
+
+    public int numLeadingParams() {
+        return 2 + (linkerOptions.hasCapturedCallState() ? 1 : 0); // 2 for addr, allocator
+    }
+
+    public String asString() {
+        StringBuilder sb = new StringBuilder();
+
+        sb.append("CallingSequence: {\n");
+        sb.append("  callerMethodType: ").append(callerMethodType);
+        sb.append("  calleeMethodType: ").append(calleeMethodType);
+        sb.append("  FunctionDescriptor: ").append(desc);
+        sb.append("  Argument Bindings:\n");
+        for (int i = 0; i < argumentBindingsCount(); i++) {
+            sb.append("    ").append(i).append(": ").append(argumentBindings.get(i)).append("\n");
+        }
+        if (!returnBindings.isEmpty()) {
+            sb.append("    ").append("Return: ").append(returnBindings).append("\n");
+        }
+        sb.append("}\n");
+
+        return sb.toString();
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/foreign/abi/CallingSequenceBuilder.class b/tests/test_data/std/jdk/internal/foreign/abi/CallingSequenceBuilder.class
new file mode 100644
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diff --git a/tests/test_data/std/jdk/internal/foreign/abi/CallingSequenceBuilder.java b/tests/test_data/std/jdk/internal/foreign/abi/CallingSequenceBuilder.java
new file mode 100644
index 00000000..a439df3e
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/foreign/abi/CallingSequenceBuilder.java
@@ -0,0 +1,273 @@
+/*
+ *  Copyright (c) 2020, 2023, Oracle and/or its affiliates. All rights reserved.
+ *  DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ *  This code is free software; you can redistribute it and/or modify it
+ *  under the terms of the GNU General Public License version 2 only, as
+ *  published by the Free Software Foundation.  Oracle designates this
+ *  particular file as subject to the "Classpath" exception as provided
+ *  by Oracle in the LICENSE file that accompanied this code.
+ *
+ *  This code is distributed in the hope that it will be useful, but WITHOUT
+ *  ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ *  FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ *  version 2 for more details (a copy is included in the LICENSE file that
+ *  accompanied this code).
+ *
+ *  You should have received a copy of the GNU General Public License version
+ *  2 along with this work; if not, write to the Free Software Foundation,
+ *  Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ *  Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ *  or visit www.oracle.com if you need additional information or have any
+ *  questions.
+ */
+package jdk.internal.foreign.abi;
+
+import jdk.internal.foreign.Utils;
+import jdk.internal.foreign.abi.Binding.*;
+import jdk.internal.foreign.abi.Binding.BoxAddress;
+import jdk.internal.foreign.abi.Binding.BufferLoad;
+import jdk.internal.foreign.abi.Binding.BufferStore;
+import jdk.internal.foreign.abi.Binding.Cast;
+import jdk.internal.foreign.abi.Binding.Copy;
+import jdk.internal.foreign.abi.Binding.Dup;
+import jdk.internal.foreign.abi.Binding.SegmentBase;
+import jdk.internal.foreign.abi.Binding.SegmentOffset;
+import jdk.internal.foreign.abi.Binding.ShiftLeft;
+import jdk.internal.foreign.abi.Binding.ShiftRight;
+import jdk.internal.foreign.abi.Binding.VMLoad;
+import jdk.internal.foreign.abi.Binding.VMStore;
+import sun.security.action.GetPropertyAction;
+
+import java.lang.foreign.FunctionDescriptor;
+import java.lang.foreign.MemoryLayout;
+import java.lang.foreign.MemorySegment;
+import java.lang.foreign.ValueLayout;
+import java.lang.invoke.MethodType;
+import java.util.ArrayDeque;
+import java.util.ArrayList;
+import java.util.Deque;
+import java.util.List;
+
+import static java.lang.invoke.MethodType.methodType;
+
+public class CallingSequenceBuilder {
+    private static final boolean VERIFY_BINDINGS = Boolean.parseBoolean(
+            GetPropertyAction.privilegedGetProperty("java.lang.foreign.VERIFY_BINDINGS", "true"));
+
+    private final ABIDescriptor abi;
+    private final LinkerOptions linkerOptions;
+
+    private final boolean forUpcall;
+    private final List<List<Binding>> inputBindings = new ArrayList<>();
+    private List<Binding> outputBindings = List.of();
+
+    private MethodType mt = MethodType.methodType(void.class);
+    private FunctionDescriptor desc = FunctionDescriptor.ofVoid();
+
+    public CallingSequenceBuilder(ABIDescriptor abi, boolean forUpcall, LinkerOptions linkerOptions) {
+        this.abi = abi;
+        this.forUpcall = forUpcall;
+        this.linkerOptions = linkerOptions;
+    }
+
+    public final CallingSequenceBuilder addArgumentBindings(Class<?> carrier, MemoryLayout layout,
+                                                            List<Binding> bindings) {
+        addArgumentBinding(inputBindings.size(), carrier, layout, bindings);
+        return this;
+    }
+
+    private void addArgumentBinding(int index, Class<?> carrier, MemoryLayout layout, List<Binding> bindings) {
+        verifyBindings(true, carrier, bindings);
+        inputBindings.add(index, bindings);
+        mt = mt.insertParameterTypes(index, carrier);
+        desc = desc.insertArgumentLayouts(index, layout);
+    }
+
+    public CallingSequenceBuilder setReturnBindings(Class<?> carrier, MemoryLayout layout,
+                                                    List<Binding> bindings) {
+        verifyBindings(false, carrier, bindings);
+        this.outputBindings = bindings;
+        mt = mt.changeReturnType(carrier);
+        desc = desc.changeReturnLayout(layout);
+        return this;
+    }
+
+    private boolean needsReturnBuffer() {
+        return outputBindings.stream()
+            .filter(Binding.Move.class::isInstance)
+            .count() > 1;
+    }
+
+    public CallingSequence build() {
+        boolean needsReturnBuffer = needsReturnBuffer();
+        long returnBufferSize = needsReturnBuffer ? computeReturnBufferSize() : 0;
+        long allocationSize = computeAllocationSize() + returnBufferSize;
+        MethodType callerMethodType;
+        MethodType calleeMethodType;
+        if (!forUpcall) {
+            if (linkerOptions.hasCapturedCallState()) {
+                addArgumentBinding(0, MemorySegment.class, ValueLayout.ADDRESS, List.of(
+                        Binding.unboxAddress(),
+                        Binding.vmStore(abi.capturedStateStorage(), long.class)));
+            }
+            addArgumentBinding(0, MemorySegment.class, ValueLayout.ADDRESS, List.of(
+                Binding.unboxAddress(),
+                Binding.vmStore(abi.targetAddrStorage(), long.class)));
+            if (needsReturnBuffer) {
+                addArgumentBinding(0, MemorySegment.class, ValueLayout.ADDRESS, List.of(
+                    Binding.unboxAddress(),
+                    Binding.vmStore(abi.retBufAddrStorage(), long.class)));
+            }
+
+            callerMethodType = mt;
+            calleeMethodType = computeCalleeTypeForDowncall();
+        } else { // forUpcall == true
+            if (needsReturnBuffer) {
+                addArgumentBinding(0, MemorySegment.class, ValueLayout.ADDRESS, List.of(
+                        Binding.vmLoad(abi.retBufAddrStorage(), long.class),
+                        Binding.boxAddress(returnBufferSize)));
+            }
+
+            callerMethodType = computeCallerTypeForUpcall();
+            calleeMethodType = mt;
+        }
+        return new CallingSequence(forUpcall, callerMethodType, calleeMethodType, desc, needsReturnBuffer,
+                returnBufferSize, allocationSize, inputBindings, outputBindings, linkerOptions);
+    }
+
+    private MethodType computeCallerTypeForUpcall() {
+        return computeTypeHelper(VMLoad.class, VMStore.class);
+    }
+
+    private MethodType computeCalleeTypeForDowncall() {
+        return computeTypeHelper(VMStore.class, VMLoad.class);
+    }
+
+    private MethodType computeTypeHelper(Class<? extends Binding.Move> inputVMClass,
+                                         Class<? extends Binding.Move> outputVMClass) {
+        Class<?>[] paramTypes = inputBindings.stream()
+                .flatMap(List::stream)
+                .filter(inputVMClass::isInstance)
+                .map(inputVMClass::cast)
+                .map(Binding.Move::type)
+                .toArray(Class<?>[]::new);
+
+        Binding.Move[] retMoves = outputBindings.stream()
+                .filter(outputVMClass::isInstance)
+                .map(outputVMClass::cast)
+                .toArray(Binding.Move[]::new);
+        Class<?> returnType = retMoves.length == 1 ? retMoves[0].type() : void.class;
+
+        return methodType(returnType, paramTypes);
+    }
+
+    private long computeAllocationSize() {
+        // FIXME: > 16 bytes alignment might need extra space since the
+        // starting address of the allocator might be un-aligned.
+        long size = 0;
+        for (List<Binding> bindings : inputBindings) {
+            for (Binding b : bindings) {
+                if (b instanceof Copy copy) {
+                    size = Utils.alignUp(size, copy.alignment());
+                    size += copy.size();
+                } else if (b instanceof Allocate allocate) {
+                    size = Utils.alignUp(size, allocate.alignment());
+                    size += allocate.size();
+                }
+            }
+        }
+        return size;
+    }
+
+    private long computeReturnBufferSize() {
+        return outputBindings.stream()
+                .filter(Binding.Move.class::isInstance)
+                .map(Binding.Move.class::cast)
+                .map(Binding.Move::storage)
+                .map(VMStorage::type)
+                .mapToLong(abi.arch::typeSize)
+                .sum();
+    }
+
+    private void verifyBindings(boolean forArguments, Class<?> carrier, List<Binding> bindings) {
+        if (VERIFY_BINDINGS) {
+            if (forUpcall == forArguments) {
+                verifyBoxBindings(carrier, bindings);
+            } else {
+                verifyUnboxBindings(carrier, bindings);
+            }
+        }
+    }
+
+    private static void verifyUnboxBindings(Class<?> inType, List<Binding> bindings) {
+        Deque<Class<?>> stack = new ArrayDeque<>();
+        stack.push(inType);
+
+        for (Binding b : bindings) {
+            if (!isUnbox(b))
+                throw new IllegalArgumentException("Unexpected operator: " + b);
+            b.verify(stack);
+        }
+
+        if (!stack.isEmpty()) {
+            throw new IllegalArgumentException("Stack must be empty after recipe");
+        }
+    }
+
+    static boolean isUnbox(Binding binding) {
+        return switch (binding) {
+            case VMStore       unused -> true;
+            case BufferLoad    unused -> true;
+            case Copy          unused -> true;
+            case Dup           unused -> true;
+            case SegmentBase   unused -> true;
+            case SegmentOffset unused -> true;
+            case ShiftLeft     unused -> true;
+            case ShiftRight    unused -> true;
+            case Cast          unused -> true;
+            case VMLoad        unused -> false;
+            case BufferStore   unused -> false;
+            case Allocate      unused -> false;
+            case BoxAddress    unused -> false;
+        };
+    }
+
+    private static void verifyBoxBindings(Class<?> expectedOutType, List<Binding> bindings) {
+        Deque<Class<?>> stack = new ArrayDeque<>();
+
+        for (Binding b : bindings) {
+            if (!isBox(b))
+                throw new IllegalArgumentException("Unexpected operator: " + b);
+            b.verify(stack);
+        }
+
+        if (stack.size() != 1) {
+            throw new IllegalArgumentException("Stack must contain exactly 1 value");
+        }
+
+        Class<?> actualOutType = stack.pop();
+        SharedUtils.checkType(actualOutType, expectedOutType);
+    }
+
+    static boolean isBox(Binding binding) {
+        return switch (binding) {
+            case VMLoad        unused -> true;
+            case BufferStore   unused -> true;
+            case Copy          unused -> true;
+            case Allocate      unused -> true;
+            case BoxAddress    unused -> true;
+            case Dup           unused -> true;
+            case ShiftLeft     unused -> true;
+            case ShiftRight    unused -> true;
+            case Cast          unused -> true;
+
+            case VMStore       unused -> false;
+            case BufferLoad    unused -> false;
+            case SegmentBase   unused -> false;
+            case SegmentOffset unused -> false;
+        };
+    }
+
+}
diff --git a/tests/test_data/std/jdk/internal/foreign/abi/CapturableState.class b/tests/test_data/std/jdk/internal/foreign/abi/CapturableState.class
new file mode 100644
index 0000000000000000000000000000000000000000..b3cb8f8fb754061170a9b86fd7d37f826ff4eb5f
GIT binary patch
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/foreign/abi/CapturableState.java b/tests/test_data/std/jdk/internal/foreign/abi/CapturableState.java
new file mode 100644
index 00000000..8689751a
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/foreign/abi/CapturableState.java
@@ -0,0 +1,88 @@
+/*
+ * Copyright (c) 2022, 2023, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package jdk.internal.foreign.abi;
+
+import jdk.internal.foreign.Utils;
+
+import java.lang.foreign.MemoryLayout;
+import java.lang.foreign.StructLayout;
+import java.lang.foreign.ValueLayout;
+import java.util.stream.Collectors;
+import java.util.stream.Stream;
+
+import static java.lang.foreign.ValueLayout.JAVA_INT;
+
+public enum CapturableState {
+    GET_LAST_ERROR    ("GetLastError",    JAVA_INT, 1 << 0, Utils.IS_WINDOWS),
+    WSA_GET_LAST_ERROR("WSAGetLastError", JAVA_INT, 1 << 1, Utils.IS_WINDOWS),
+    ERRNO             ("errno",           JAVA_INT, 1 << 2, true);
+
+    public static final StructLayout LAYOUT = MemoryLayout.structLayout(
+        supportedStates().map(CapturableState::layout).toArray(MemoryLayout[]::new));
+
+    private final String stateName;
+    private final ValueLayout layout;
+    private final int mask;
+    private final boolean isSupported;
+
+    CapturableState(String stateName, ValueLayout layout, int mask, boolean isSupported) {
+        this.stateName = stateName;
+        this.layout = layout.withName(stateName);
+        this.mask = mask;
+        this.isSupported = isSupported;
+    }
+
+    private static Stream<CapturableState> supportedStates() {
+        return Stream.of(values()).filter(CapturableState::isSupported);
+    }
+
+    public static CapturableState forName(String name) {
+        return Stream.of(values())
+                .filter(stl -> stl.stateName().equals(name))
+                .filter(CapturableState::isSupported)
+                .findAny()
+                .orElseThrow(() -> new IllegalArgumentException(
+                        "Unknown name: " + name +", must be one of: "
+                            + supportedStates()
+                                    .map(CapturableState::stateName)
+                                    .collect(Collectors.joining(", "))));
+    }
+
+    public String stateName() {
+        return stateName;
+    }
+
+    public ValueLayout layout() {
+        return layout;
+    }
+
+    public int mask() {
+        return mask;
+    }
+
+    public boolean isSupported() {
+        return isSupported;
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/foreign/abi/DowncallLinker$1.class b/tests/test_data/std/jdk/internal/foreign/abi/DowncallLinker$1.class
new file mode 100644
index 0000000000000000000000000000000000000000..7ace477d68d9ac20c05a751356a04286f244ad7f
GIT binary patch
literal 1351
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/foreign/abi/DowncallLinker$2.class b/tests/test_data/std/jdk/internal/foreign/abi/DowncallLinker$2.class
new file mode 100644
index 0000000000000000000000000000000000000000..359f8ae47a5fa5ec3136f1e1a42fa08ab7fc6377
GIT binary patch
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R{ke@*d@_>8I;|dI`ft>iLi7Lt

literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/foreign/abi/DowncallLinker$InvocationData.class b/tests/test_data/std/jdk/internal/foreign/abi/DowncallLinker$InvocationData.class
new file mode 100644
index 0000000000000000000000000000000000000000..a80b41d1337053edad4de53db904304580a0d558
GIT binary patch
literal 1948
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/foreign/abi/DowncallLinker.class b/tests/test_data/std/jdk/internal/foreign/abi/DowncallLinker.class
new file mode 100644
index 0000000000000000000000000000000000000000..0e55eb126afdb8d503a25bfd8678fa14492c19bb
GIT binary patch
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HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/foreign/abi/DowncallLinker.java b/tests/test_data/std/jdk/internal/foreign/abi/DowncallLinker.java
new file mode 100644
index 00000000..44fee62c
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/foreign/abi/DowncallLinker.java
@@ -0,0 +1,223 @@
+/*
+ * Copyright (c) 2020, 2023, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package jdk.internal.foreign.abi;
+
+import jdk.internal.access.JavaLangInvokeAccess;
+import jdk.internal.access.SharedSecrets;
+import sun.security.action.GetPropertyAction;
+
+import java.lang.foreign.AddressLayout;
+import java.lang.foreign.Arena;
+import java.lang.foreign.MemorySegment;
+import java.lang.foreign.SegmentAllocator;
+import java.lang.invoke.MethodHandle;
+import java.lang.invoke.MethodHandles;
+import java.lang.invoke.MethodType;
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.List;
+import java.util.Map;
+import java.util.stream.Stream;
+
+import jdk.internal.foreign.AbstractMemorySegmentImpl;
+import jdk.internal.foreign.MemorySessionImpl;
+
+import static java.lang.invoke.MethodHandles.collectArguments;
+import static java.lang.invoke.MethodHandles.foldArguments;
+import static java.lang.invoke.MethodHandles.identity;
+import static java.lang.invoke.MethodHandles.insertArguments;
+import static java.lang.invoke.MethodType.methodType;
+
+public class DowncallLinker {
+    private static final boolean USE_SPEC = Boolean.parseBoolean(
+        GetPropertyAction.privilegedGetProperty("jdk.internal.foreign.DowncallLinker.USE_SPEC", "true"));
+
+    private static final JavaLangInvokeAccess JLIA = SharedSecrets.getJavaLangInvokeAccess();
+
+    private static final MethodHandle MH_INVOKE_INTERP_BINDINGS;
+    private static final MethodHandle EMPTY_OBJECT_ARRAY_HANDLE = MethodHandles.constant(Object[].class, new Object[0]);
+
+    static {
+        try {
+            MethodHandles.Lookup lookup = MethodHandles.lookup();
+            MH_INVOKE_INTERP_BINDINGS = lookup.findVirtual(DowncallLinker.class, "invokeInterpBindings",
+                    methodType(Object.class, SegmentAllocator.class, Object[].class, InvocationData.class));
+        } catch (ReflectiveOperationException e) {
+            throw new RuntimeException(e);
+        }
+    }
+
+    private final ABIDescriptor abi;
+    private final CallingSequence callingSequence;
+
+    public DowncallLinker(ABIDescriptor abi, CallingSequence callingSequence) {
+        this.abi = abi;
+        assert callingSequence.forDowncall();
+        this.callingSequence = callingSequence;
+    }
+
+    public MethodHandle getBoundMethodHandle() {
+        Binding.VMStore[] argMoves = argMoveBindingsStream(callingSequence).toArray(Binding.VMStore[]::new);
+        Binding.VMLoad[] retMoves = retMoveBindings(callingSequence);
+
+        MethodType leafType = callingSequence.calleeMethodType();
+
+        NativeEntryPoint nep = NativeEntryPoint.make(
+            abi,
+            toStorageArray(argMoves),
+            toStorageArray(retMoves),
+            leafType,
+            callingSequence.needsReturnBuffer(),
+            callingSequence.capturedStateMask(),
+            callingSequence.needsTransition()
+        );
+        MethodHandle handle = JLIA.nativeMethodHandle(nep);
+
+        if (USE_SPEC) {
+            handle = BindingSpecializer.specializeDowncall(handle, callingSequence, abi);
+         } else {
+            InvocationData invData = new InvocationData(handle, callingSequence);
+            handle = insertArguments(MH_INVOKE_INTERP_BINDINGS.bindTo(this), 2, invData);
+            MethodType interpType = callingSequence.callerMethodType();
+            if (callingSequence.needsReturnBuffer()) {
+                // Return buffer is supplied by invokeInterpBindings
+                assert interpType.parameterType(0) == MemorySegment.class;
+                interpType = interpType.dropParameterTypes(0, 1);
+            }
+            MethodHandle collectorInterp = makeCollectorHandle(interpType);
+            handle = collectArguments(handle, 1, collectorInterp);
+            handle = handle.asType(handle.type().changeReturnType(interpType.returnType()));
+         }
+
+        assert handle.type().parameterType(0) == SegmentAllocator.class;
+        assert handle.type().parameterType(1) == MemorySegment.class;
+        handle = foldArguments(handle, 1, SharedUtils.MH_CHECK_SYMBOL);
+
+        handle = SharedUtils.swapArguments(handle, 0, 1); // normalize parameter order
+
+        return handle;
+    }
+
+    // Funnel from type to Object[]
+    private static MethodHandle makeCollectorHandle(MethodType type) {
+        return type.parameterCount() == 0
+            ? EMPTY_OBJECT_ARRAY_HANDLE
+            : identity(Object[].class)
+                .asCollector(Object[].class, type.parameterCount())
+                .asType(type.changeReturnType(Object[].class));
+    }
+
+    private Stream<Binding.VMStore> argMoveBindingsStream(CallingSequence callingSequence) {
+        return callingSequence.argumentBindings()
+                .filter(Binding.VMStore.class::isInstance)
+                .map(Binding.VMStore.class::cast);
+    }
+
+    private Binding.VMLoad[] retMoveBindings(CallingSequence callingSequence) {
+        return retMoveBindingsStream(callingSequence).toArray(Binding.VMLoad[]::new);
+    }
+
+    private Stream<Binding.VMLoad> retMoveBindingsStream(CallingSequence callingSequence) {
+        return callingSequence.returnBindings().stream()
+                .filter(Binding.VMLoad.class::isInstance)
+                .map(Binding.VMLoad.class::cast);
+    }
+
+    private VMStorage[] toStorageArray(Binding.Move[] moves) {
+        return Arrays.stream(moves).map(Binding.Move::storage).toArray(VMStorage[]::new);
+    }
+
+    private record InvocationData(MethodHandle leaf, CallingSequence callingSequence) {}
+
+    Object invokeInterpBindings(SegmentAllocator allocator, Object[] args, InvocationData invData) throws Throwable {
+        Arena unboxArena = callingSequence.allocationSize() != 0
+                ? SharedUtils.newBoundedArena(callingSequence.allocationSize())
+                : SharedUtils.DUMMY_ARENA;
+        List<MemorySessionImpl> acquiredScopes = new ArrayList<>();
+        try (unboxArena) {
+            MemorySegment returnBuffer = null;
+
+            // do argument processing, get Object[] as result
+            if (callingSequence.needsReturnBuffer()) {
+                // we supply the return buffer (argument array does not contain it)
+                Object[] prefixedArgs = new Object[args.length + 1];
+                returnBuffer = unboxArena.allocate(callingSequence.returnBufferSize());
+                prefixedArgs[0] = returnBuffer;
+                System.arraycopy(args, 0, prefixedArgs, 1, args.length);
+                args = prefixedArgs;
+            }
+
+            Object[] leafArgs = new Object[invData.leaf.type().parameterCount()];
+            BindingInterpreter.StoreFunc storeFunc = new BindingInterpreter.StoreFunc() {
+                    int argOffset = 0;
+                    @Override
+                    public void store(VMStorage storage, Object o) {
+                        leafArgs[argOffset++] = o;
+                    }
+                };
+            for (int i = 0; i < args.length; i++) {
+                Object arg = args[i];
+                if (callingSequence.functionDesc().argumentLayouts().get(i) instanceof AddressLayout) {
+                    MemorySessionImpl sessionImpl = ((AbstractMemorySegmentImpl) arg).sessionImpl();
+                    if (!(callingSequence.needsReturnBuffer() && i == 0)) { // don't acquire unboxArena's scope
+                        sessionImpl.acquire0();
+                        // add this scope _after_ we acquire, so we only release scopes we actually acquired
+                        // in case an exception occurs
+                        acquiredScopes.add(sessionImpl);
+                    }
+                }
+                BindingInterpreter.unbox(arg, callingSequence.argumentBindings(i), storeFunc, unboxArena);
+            }
+
+            // call leaf
+            Object o = invData.leaf.invokeWithArguments(leafArgs);
+
+            // return value processing
+            if (o == null) {
+                if (!callingSequence.needsReturnBuffer()) {
+                    return null;
+                }
+                MemorySegment finalReturnBuffer = returnBuffer;
+                return BindingInterpreter.box(callingSequence.returnBindings(),
+                        new BindingInterpreter.LoadFunc() {
+                            int retBufReadOffset = 0;
+                            @Override
+                            public Object load(VMStorage storage, Class<?> type) {
+                                Object result1 = SharedUtils.read(finalReturnBuffer, retBufReadOffset, type);
+                                retBufReadOffset += abi.arch.typeSize(storage.type());
+                                return result1;
+                            }
+                        }, allocator);
+            } else {
+                return BindingInterpreter.box(callingSequence.returnBindings(), (storage, type) -> o,
+                        allocator);
+            }
+        } finally {
+            for (MemorySessionImpl sessionImpl : acquiredScopes) {
+                sessionImpl.release0();
+            }
+        }
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/foreign/abi/LinkerOptions$CaptureCallState.class b/tests/test_data/std/jdk/internal/foreign/abi/LinkerOptions$CaptureCallState.class
new file mode 100644
index 0000000000000000000000000000000000000000..907f78474f57e4e3e0bbc9167509d9672c32fe2f
GIT binary patch
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/foreign/abi/LinkerOptions$Critical.class b/tests/test_data/std/jdk/internal/foreign/abi/LinkerOptions$Critical.class
new file mode 100644
index 0000000000000000000000000000000000000000..732b7cee0f0fbf5d6bc6da8fe3a80910b8b1bb1c
GIT binary patch
literal 1971
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literal 0
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diff --git a/tests/test_data/std/jdk/internal/foreign/abi/LinkerOptions$FirstVariadicArg.class b/tests/test_data/std/jdk/internal/foreign/abi/LinkerOptions$FirstVariadicArg.class
new file mode 100644
index 0000000000000000000000000000000000000000..80d2cbce2d004b6ec36938e404a4c4417af836ae
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literal 0
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diff --git a/tests/test_data/std/jdk/internal/foreign/abi/LinkerOptions$LinkerOptionImpl.class b/tests/test_data/std/jdk/internal/foreign/abi/LinkerOptions$LinkerOptionImpl.class
new file mode 100644
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diff --git a/tests/test_data/std/jdk/internal/foreign/abi/LinkerOptions.class b/tests/test_data/std/jdk/internal/foreign/abi/LinkerOptions.class
new file mode 100644
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/foreign/abi/LinkerOptions.java b/tests/test_data/std/jdk/internal/foreign/abi/LinkerOptions.java
new file mode 100644
index 00000000..fcc98ecc
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/foreign/abi/LinkerOptions.java
@@ -0,0 +1,162 @@
+/*
+ * Copyright (c) 2022, 2023, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package jdk.internal.foreign.abi;
+
+import java.lang.foreign.FunctionDescriptor;
+import java.lang.foreign.Linker;
+import java.util.HashMap;
+import java.util.Map;
+import java.util.Objects;
+import java.util.Set;
+import java.util.function.BiConsumer;
+import java.util.stream.Stream;
+
+public class LinkerOptions {
+
+    private static final LinkerOptions EMPTY = new LinkerOptions(Map.of());
+    private final Map<Class<?>, LinkerOptionImpl> optionsMap;
+
+    private LinkerOptions(Map<Class<?>, LinkerOptionImpl> optionsMap) {
+        this.optionsMap = optionsMap;
+    }
+
+    public static LinkerOptions forDowncall(FunctionDescriptor desc, Linker.Option... options) {
+        return forShared(LinkerOptionImpl::validateForDowncall, desc, options);
+    }
+
+    public static LinkerOptions forUpcall(FunctionDescriptor desc, Linker.Option[] options) {
+        return forShared(LinkerOptionImpl::validateForUpcall, desc, options);
+    }
+
+    private static LinkerOptions forShared(BiConsumer<LinkerOptionImpl, FunctionDescriptor> validator,
+                                           FunctionDescriptor desc, Linker.Option... options) {
+       Map<Class<?>, LinkerOptionImpl> optionMap = new HashMap<>();
+
+        for (Linker.Option option : options) {
+            if (optionMap.containsKey(option.getClass())) {
+                throw new IllegalArgumentException("Duplicate option: " + option);
+            }
+            LinkerOptionImpl opImpl = (LinkerOptionImpl) option;
+            validator.accept(opImpl, desc);
+            optionMap.put(option.getClass(), opImpl);
+        }
+
+        LinkerOptions linkerOptions = new LinkerOptions(optionMap);
+        if (linkerOptions.hasCapturedCallState() && linkerOptions.isCritical()) {
+            throw new IllegalArgumentException("Incompatible linker options: captureCallState, critical");
+        }
+        return linkerOptions;
+    }
+
+    public static LinkerOptions empty() {
+        return EMPTY;
+    }
+
+    private <T extends Linker.Option> T getOption(Class<T> type) {
+        return type.cast(optionsMap.get(type));
+    }
+
+    public boolean isVarargsIndex(int argIndex) {
+        FirstVariadicArg fva = getOption(FirstVariadicArg.class);
+        return fva != null && argIndex >= fva.index();
+    }
+
+    public boolean hasCapturedCallState() {
+        return getOption(CaptureCallState.class) != null;
+    }
+
+    public Stream<CapturableState> capturedCallState() {
+        CaptureCallState stl = getOption(CaptureCallState.class);
+        return stl == null ? Stream.empty() : stl.saved().stream();
+    }
+
+    public boolean isVariadicFunction() {
+        FirstVariadicArg fva = getOption(FirstVariadicArg.class);
+        return fva != null;
+    }
+
+    public int firstVariadicArgIndex() {
+        return getOption(FirstVariadicArg.class).index();
+    }
+
+    public boolean isCritical() {
+        Critical c = getOption(Critical.class);
+        return c != null;
+    }
+
+    public boolean allowsHeapAccess() {
+        Critical c = getOption(Critical.class);
+        return c != null && c.allowHeapAccess();
+    }
+
+    @Override
+    public boolean equals(Object o) {
+        if (this == o) return true;
+        return o instanceof LinkerOptions that
+                && Objects.equals(optionsMap, that.optionsMap);
+    }
+
+    @Override
+    public int hashCode() {
+        return Objects.hash(optionsMap);
+    }
+
+    public sealed interface LinkerOptionImpl extends Linker.Option
+            permits CaptureCallState, FirstVariadicArg, Critical {
+        default void validateForDowncall(FunctionDescriptor descriptor) {
+            throw new IllegalArgumentException("Not supported for downcall: " + this);
+        }
+
+        default void validateForUpcall(FunctionDescriptor descriptor) {
+            throw new IllegalArgumentException("Not supported for upcall: " + this);
+        }
+    }
+
+    public record FirstVariadicArg(int index) implements LinkerOptionImpl {
+        @Override
+        public void validateForDowncall(FunctionDescriptor descriptor) {
+            if (index < 0 || index > descriptor.argumentLayouts().size()) {
+                throw new IllegalArgumentException("Index '" + index + "' not in bounds for descriptor: " + descriptor);
+            }
+        }
+    }
+
+    public record CaptureCallState(Set<CapturableState> saved) implements LinkerOptionImpl {
+        @Override
+        public void validateForDowncall(FunctionDescriptor descriptor) {
+            // done during construction
+        }
+    }
+
+    public record Critical(boolean allowHeapAccess) implements LinkerOptionImpl {
+        public static Critical ALLOW_HEAP = new Critical(true);
+        public static Critical DONT_ALLOW_HEAP = new Critical(false);
+
+        @Override
+        public void validateForDowncall(FunctionDescriptor descriptor) {
+            // always allowed
+        }
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/foreign/abi/NativeEntryPoint$CacheKey.class b/tests/test_data/std/jdk/internal/foreign/abi/NativeEntryPoint$CacheKey.class
new file mode 100644
index 0000000000000000000000000000000000000000..9d5a8ab20fe003357b47cd30aa7b4b9540a0d525
GIT binary patch
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/foreign/abi/NativeEntryPoint.class b/tests/test_data/std/jdk/internal/foreign/abi/NativeEntryPoint.class
new file mode 100644
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GIT binary patch
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/foreign/abi/NativeEntryPoint.java b/tests/test_data/std/jdk/internal/foreign/abi/NativeEntryPoint.java
new file mode 100644
index 00000000..e65cee68
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/foreign/abi/NativeEntryPoint.java
@@ -0,0 +1,112 @@
+/*
+ * Copyright (c) 2020, 2023, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package jdk.internal.foreign.abi;
+
+import jdk.internal.ref.CleanerFactory;
+
+import java.lang.invoke.MethodType;
+import java.lang.ref.Cleaner;
+import java.util.Arrays;
+import java.util.List;
+
+/**
+ * This class describes a 'native entry point', which is used as an appendix argument to linkToNative calls.
+ */
+public class NativeEntryPoint {
+    static {
+        registerNatives();
+    }
+
+    private final MethodType methodType;
+    private final long downcallStubAddress; // read by VM
+
+    private static final Cleaner CLEANER = CleanerFactory.cleaner();
+    private static final SoftReferenceCache<CacheKey, NativeEntryPoint> NEP_CACHE = new SoftReferenceCache<>();
+    private record CacheKey(MethodType methodType, ABIDescriptor abi,
+                            List<VMStorage> argMoves, List<VMStorage> retMoves,
+                            boolean needsReturnBuffer, int capturedStateMask,
+                            boolean needsTransition) {}
+
+    private NativeEntryPoint(MethodType methodType, long downcallStubAddress) {
+        this.methodType = methodType;
+        this.downcallStubAddress = downcallStubAddress;
+    }
+
+    public static NativeEntryPoint make(ABIDescriptor abi,
+                                        VMStorage[] argMoves, VMStorage[] returnMoves,
+                                        MethodType methodType,
+                                        boolean needsReturnBuffer,
+                                        int capturedStateMask,
+                                        boolean needsTransition) {
+        if (returnMoves.length > 1 != needsReturnBuffer) {
+            throw new AssertionError("Multiple register return, but needsReturnBuffer was false");
+        }
+        checkType(methodType, needsReturnBuffer, capturedStateMask);
+
+        CacheKey key = new CacheKey(methodType, abi, Arrays.asList(argMoves), Arrays.asList(returnMoves),
+                                    needsReturnBuffer, capturedStateMask, needsTransition);
+        return NEP_CACHE.get(key, k -> {
+            long downcallStub = makeDowncallStub(methodType, abi, argMoves, returnMoves, needsReturnBuffer,
+                                                 capturedStateMask, needsTransition);
+            if (downcallStub == 0) {
+                throw new OutOfMemoryError("Failed to allocate downcall stub");
+            }
+            NativeEntryPoint nep = new NativeEntryPoint(methodType, downcallStub);
+            CLEANER.register(nep, () -> freeDowncallStub(downcallStub));
+            return nep;
+        });
+    }
+
+    private static void checkType(MethodType methodType, boolean needsReturnBuffer, int savedValueMask) {
+        if (methodType.parameterType(0) != long.class) {
+            throw new AssertionError("Address expected as first param: " + methodType);
+        }
+        int checkIdx = 1;
+        if ((needsReturnBuffer && methodType.parameterType(checkIdx++) != long.class)
+            || (savedValueMask != 0 && methodType.parameterType(checkIdx) != long.class)) {
+            throw new AssertionError("return buffer and/or preserved value address expected: " + methodType);
+        }
+    }
+
+    private static native long makeDowncallStub(MethodType methodType, ABIDescriptor abi,
+                                                VMStorage[] encArgMoves, VMStorage[] encRetMoves,
+                                                boolean needsReturnBuffer,
+                                                int capturedStateMask,
+                                                boolean needsTransition);
+
+    private static native boolean freeDowncallStub0(long downcallStub);
+    private static void freeDowncallStub(long downcallStub) {
+        if (!freeDowncallStub0(downcallStub)) {
+            throw new InternalError("Could not free downcall stub");
+        }
+    }
+
+    public MethodType type() {
+        return methodType;
+    }
+
+    private static native void registerNatives();
+}
diff --git a/tests/test_data/std/jdk/internal/foreign/abi/SharedUtils$1.class b/tests/test_data/std/jdk/internal/foreign/abi/SharedUtils$1.class
new file mode 100644
index 0000000000000000000000000000000000000000..da6783a6bc4d58f580149b974fffb6d87fc7f305
GIT binary patch
literal 956
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/foreign/abi/SharedUtils$2.class b/tests/test_data/std/jdk/internal/foreign/abi/SharedUtils$2.class
new file mode 100644
index 0000000000000000000000000000000000000000..ba1c452b4d03e2cf7f8af03fc6d6cffe8a5ed9ee
GIT binary patch
literal 1465
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/foreign/abi/SharedUtils$3.class b/tests/test_data/std/jdk/internal/foreign/abi/SharedUtils$3.class
new file mode 100644
index 0000000000000000000000000000000000000000..b034a36fa417511fcd7f97785c28501dbff0fd7c
GIT binary patch
literal 1130
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/foreign/abi/SharedUtils$4.class b/tests/test_data/std/jdk/internal/foreign/abi/SharedUtils$4.class
new file mode 100644
index 0000000000000000000000000000000000000000..9b26e79a7242d6826bc3259069315b63855a503a
GIT binary patch
literal 1257
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/foreign/abi/SharedUtils.class b/tests/test_data/std/jdk/internal/foreign/abi/SharedUtils.class
new file mode 100644
index 0000000000000000000000000000000000000000..b6080b0559526b547f306c2628ee6545893a2119
GIT binary patch
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HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/foreign/abi/SharedUtils.java b/tests/test_data/std/jdk/internal/foreign/abi/SharedUtils.java
new file mode 100644
index 00000000..83698398
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/foreign/abi/SharedUtils.java
@@ -0,0 +1,526 @@
+/*
+ * Copyright (c) 2020, 2024, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package jdk.internal.foreign.abi;
+
+import jdk.internal.access.JavaLangAccess;
+import jdk.internal.access.JavaLangInvokeAccess;
+import jdk.internal.access.SharedSecrets;
+import jdk.internal.foreign.CABI;
+import jdk.internal.foreign.abi.AbstractLinker.UpcallStubFactory;
+import jdk.internal.foreign.abi.aarch64.linux.LinuxAArch64Linker;
+import jdk.internal.foreign.abi.aarch64.macos.MacOsAArch64Linker;
+import jdk.internal.foreign.abi.aarch64.windows.WindowsAArch64Linker;
+import jdk.internal.foreign.abi.fallback.FallbackLinker;
+import jdk.internal.foreign.abi.ppc64.aix.AixPPC64Linker;
+import jdk.internal.foreign.abi.ppc64.linux.LinuxPPC64Linker;
+import jdk.internal.foreign.abi.ppc64.linux.LinuxPPC64leLinker;
+import jdk.internal.foreign.abi.riscv64.linux.LinuxRISCV64Linker;
+import jdk.internal.foreign.abi.s390.linux.LinuxS390Linker;
+import jdk.internal.foreign.abi.x64.sysv.SysVx64Linker;
+import jdk.internal.foreign.abi.x64.windows.Windowsx64Linker;
+import jdk.internal.vm.annotation.ForceInline;
+
+import java.lang.foreign.AddressLayout;
+import java.lang.foreign.Arena;
+import java.lang.foreign.Linker;
+import java.lang.foreign.FunctionDescriptor;
+import java.lang.foreign.GroupLayout;
+import java.lang.foreign.MemoryLayout;
+import java.lang.foreign.MemorySegment;
+import java.lang.foreign.MemorySegment.Scope;
+import java.lang.foreign.SegmentAllocator;
+import java.lang.foreign.ValueLayout;
+import java.lang.invoke.MethodHandle;
+import java.lang.invoke.MethodHandles;
+import java.lang.invoke.MethodType;
+import java.lang.ref.Reference;
+import java.nio.ByteOrder;
+import java.util.Arrays;
+import java.util.Map;
+import java.util.Objects;
+import java.util.stream.Collectors;
+import java.util.stream.IntStream;
+
+import static java.lang.foreign.ValueLayout.*;
+import static java.lang.invoke.MethodHandles.*;
+import static java.lang.invoke.MethodType.methodType;
+
+public final class SharedUtils {
+
+    private SharedUtils() {
+    }
+
+    private static final JavaLangAccess JLA = SharedSecrets.getJavaLangAccess();
+    private static final JavaLangInvokeAccess JLIA = SharedSecrets.getJavaLangInvokeAccess();
+
+    private static final MethodHandle MH_ALLOC_BUFFER;
+    private static final MethodHandle MH_BUFFER_COPY;
+    private static final MethodHandle MH_REACHABILITY_FENCE;
+    public static final MethodHandle MH_CHECK_SYMBOL;
+    private static final MethodHandle MH_CHECK_CAPTURE_SEGMENT;
+
+    @SuppressWarnings("restricted")
+    public static final AddressLayout C_POINTER = ADDRESS
+            .withTargetLayout(MemoryLayout.sequenceLayout(Long.MAX_VALUE, JAVA_BYTE));
+
+    public static final Arena DUMMY_ARENA = new Arena() {
+        @Override
+        public Scope scope() {
+            throw new UnsupportedOperationException();
+        }
+
+        @Override
+        public MemorySegment allocate(long byteSize, long byteAlignment) {
+            throw new UnsupportedOperationException();
+        }
+
+        @Override
+        public void close() {
+            // do nothing
+        }
+    };
+
+    static {
+        try {
+            MethodHandles.Lookup lookup = MethodHandles.lookup();
+            MH_ALLOC_BUFFER = lookup.findVirtual(SegmentAllocator.class, "allocate",
+                    methodType(MemorySegment.class, MemoryLayout.class));
+            MH_BUFFER_COPY = lookup.findStatic(SharedUtils.class, "bufferCopy",
+                    methodType(MemorySegment.class, MemorySegment.class, MemorySegment.class));
+            MH_REACHABILITY_FENCE = lookup.findStatic(Reference.class, "reachabilityFence",
+                    methodType(void.class, Object.class));
+            MH_CHECK_SYMBOL = lookup.findStatic(SharedUtils.class, "checkSymbol",
+                    methodType(void.class, MemorySegment.class));
+            MH_CHECK_CAPTURE_SEGMENT = lookup.findStatic(SharedUtils.class, "checkCaptureSegment",
+                    methodType(MemorySegment.class, MemorySegment.class));
+        } catch (ReflectiveOperationException e) {
+            throw new BootstrapMethodError(e);
+        }
+    }
+
+    // this allocator should be used when no allocation is expected
+    public static final SegmentAllocator THROWING_ALLOCATOR = (size, align) -> {
+        throw new IllegalStateException("Cannot get here");
+    };
+
+    public static long alignUp(long addr, long alignment) {
+        return ((addr - 1) | (alignment - 1)) + 1;
+    }
+
+    public static long remainsToAlignment(long addr, long alignment) {
+        return alignUp(addr, alignment) - addr;
+    }
+
+    /**
+     * Takes a MethodHandle that takes an input buffer as a first argument (a MemorySegment), and returns nothing,
+     * and adapts it to return a MemorySegment, by allocating a MemorySegment for the input
+     * buffer, calling the target MethodHandle, and then returning the allocated MemorySegment.
+     *
+     * This allows viewing a MethodHandle that makes use of in memory return (IMR) as a MethodHandle that just returns
+     * a MemorySegment without requiring a pre-allocated buffer as an explicit input.
+     *
+     * @param handle the target handle to adapt
+     * @param cDesc the function descriptor of the native function (with actual return layout)
+     * @return the adapted handle
+     */
+    public static MethodHandle adaptDowncallForIMR(MethodHandle handle, FunctionDescriptor cDesc, CallingSequence sequence) {
+        if (handle.type().returnType() != void.class)
+            throw new IllegalArgumentException("return expected to be void for in memory returns: " + handle.type());
+        int imrAddrIdx = sequence.numLeadingParams();
+        if (handle.type().parameterType(imrAddrIdx) != MemorySegment.class)
+            throw new IllegalArgumentException("MemorySegment expected as third param: " + handle.type());
+        if (cDesc.returnLayout().isEmpty())
+            throw new IllegalArgumentException("Return layout needed: " + cDesc);
+
+        MethodHandle ret = identity(MemorySegment.class); // (MemorySegment) MemorySegment
+        handle = collectArguments(ret, 1, handle); // (MemorySegment, MemorySegment, SegmentAllocator, MemorySegment, ...) MemorySegment
+        handle = mergeArguments(handle, 0, 1 + imrAddrIdx);  // (MemorySegment, MemorySegment, SegmentAllocator, ...) MemorySegment
+        handle = collectArguments(handle, 0, insertArguments(MH_ALLOC_BUFFER, 1, cDesc.returnLayout().get())); // (SegmentAllocator, MemorySegment, SegmentAllocator, ...) MemorySegment
+        handle = mergeArguments(handle, 0, 2);  // (SegmentAllocator, MemorySegment, ...) MemorySegment
+        handle = swapArguments(handle, 0, 1); // (MemorySegment, SegmentAllocator, ...) MemorySegment
+        return handle;
+    }
+
+    /**
+     * Takes a MethodHandle that returns a MemorySegment, and adapts it to take an input buffer as a first argument
+     * (a MemorySegment), and upon invocation, copies the contents of the returned MemorySegment into the input buffer
+     * passed as the first argument.
+     *
+     * @param target the target handle to adapt
+     * @return the adapted handle
+     */
+    private static MethodHandle adaptUpcallForIMR(MethodHandle target, boolean dropReturn) {
+        if (target.type().returnType() != MemorySegment.class)
+            throw new IllegalArgumentException("Must return MemorySegment for IMR");
+
+        target = collectArguments(MH_BUFFER_COPY, 1, target); // (MemorySegment, ...) MemorySegment
+
+        if (dropReturn) { // no handling for return value, need to drop it
+            target = dropReturn(target);
+        } else {
+            // adjust return type so that it matches the inferred type of the effective
+            // function descriptor
+            target = target.asType(target.type().changeReturnType(MemorySegment.class));
+        }
+
+        return target;
+    }
+
+    public static UpcallStubFactory arrangeUpcallHelper(MethodType targetType, boolean isInMemoryReturn, boolean dropReturn,
+                                                        ABIDescriptor abi, CallingSequence callingSequence) {
+        if (isInMemoryReturn) {
+            // simulate the adaptation to get the type
+            MethodHandle fakeTarget = MethodHandles.empty(targetType);
+            targetType = adaptUpcallForIMR(fakeTarget, dropReturn).type();
+        }
+
+        UpcallStubFactory factory = UpcallLinker.makeFactory(targetType, abi, callingSequence);
+
+        if (isInMemoryReturn) {
+            final UpcallStubFactory finalFactory = factory;
+            factory = (target, scope) -> {
+                target = adaptUpcallForIMR(target, dropReturn);
+                return finalFactory.makeStub(target, scope);
+            };
+        }
+
+        return factory;
+    }
+
+    private static MemorySegment bufferCopy(MemorySegment dest, MemorySegment buffer) {
+        return dest.copyFrom(buffer);
+    }
+
+    public static Class<?> primitiveCarrierForSize(long size, boolean useFloat) {
+        return primitiveLayoutForSize(size, useFloat).carrier();
+    }
+
+    public static ValueLayout primitiveLayoutForSize(long size, boolean useFloat) {
+        if (useFloat) {
+            if (size == 4) {
+                return JAVA_FLOAT;
+            } else if (size == 8) {
+                return JAVA_DOUBLE;
+            }
+        } else {
+            if (size == 1) {
+                return JAVA_BYTE;
+            } else if (size == 2) {
+                return JAVA_SHORT;
+            } else if (size <= 4) {
+                return JAVA_INT;
+            } else if (size <= 8) {
+                return JAVA_LONG;
+            }
+        }
+
+        throw new IllegalArgumentException("No layout for size: " + size + " isFloat=" + useFloat);
+    }
+
+    public static Linker getSystemLinker() {
+        return switch (CABI.current()) {
+            case WIN_64 -> Windowsx64Linker.getInstance();
+            case SYS_V -> SysVx64Linker.getInstance();
+            case LINUX_AARCH_64 -> LinuxAArch64Linker.getInstance();
+            case MAC_OS_AARCH_64 -> MacOsAArch64Linker.getInstance();
+            case WIN_AARCH_64 -> WindowsAArch64Linker.getInstance();
+            case AIX_PPC_64 -> AixPPC64Linker.getInstance();
+            case LINUX_PPC_64 -> LinuxPPC64Linker.getInstance();
+            case LINUX_PPC_64_LE -> LinuxPPC64leLinker.getInstance();
+            case LINUX_RISCV_64 -> LinuxRISCV64Linker.getInstance();
+            case LINUX_S390 -> LinuxS390Linker.getInstance();
+            case FALLBACK -> FallbackLinker.getInstance();
+            case UNSUPPORTED -> throw new UnsupportedOperationException("Platform does not support native linker");
+        };
+    }
+
+    static Map<VMStorage, Integer> indexMap(Binding.Move[] moves) {
+        return IntStream.range(0, moves.length)
+                        .boxed()
+                        .collect(Collectors.toMap(i -> moves[i].storage(), i -> i));
+    }
+
+    static MethodHandle mergeArguments(MethodHandle mh, int sourceIndex, int destIndex) {
+        MethodType oldType = mh.type();
+        Class<?> sourceType = oldType.parameterType(sourceIndex);
+        Class<?> destType = oldType.parameterType(destIndex);
+        if (sourceType != destType) {
+            // TODO meet?
+            throw new IllegalArgumentException("Parameter types differ: " + sourceType + " != " + destType);
+        }
+        MethodType newType = oldType.dropParameterTypes(destIndex, destIndex + 1);
+        int[] reorder = new int[oldType.parameterCount()];
+        if (destIndex < sourceIndex) {
+            sourceIndex--;
+        }
+        for (int i = 0, index = 0; i < reorder.length; i++) {
+            if (i != destIndex) {
+                reorder[i] = index++;
+            } else {
+                reorder[i] = sourceIndex;
+            }
+        }
+        return permuteArguments(mh, newType, reorder);
+    }
+
+
+    public static MethodHandle swapArguments(MethodHandle mh, int firstArg, int secondArg) {
+        MethodType mtype = mh.type();
+        int[] perms = new int[mtype.parameterCount()];
+        MethodType swappedType = MethodType.methodType(mtype.returnType());
+        for (int i = 0 ; i < perms.length ; i++) {
+            int dst = i;
+            if (i == firstArg) dst = secondArg;
+            if (i == secondArg) dst = firstArg;
+            perms[i] = dst;
+            swappedType = swappedType.appendParameterTypes(mtype.parameterType(dst));
+        }
+        return permuteArguments(mh, swappedType, perms);
+    }
+
+    private static MethodHandle reachabilityFenceHandle(Class<?> type) {
+        return MH_REACHABILITY_FENCE.asType(MethodType.methodType(void.class, type));
+    }
+
+    public static void handleUncaughtException(Throwable t) {
+        if (t != null) {
+            try {
+                t.printStackTrace();
+                System.err.println("Unrecoverable uncaught exception encountered. The VM will now exit");
+            } finally {
+                JLA.exit(1);
+            }
+        }
+    }
+
+    public static void checkNative(MemorySegment segment) {
+        if (!segment.isNative()) {
+            throw new IllegalArgumentException("Heap segment not allowed: " + segment);
+        }
+    }
+
+    public static long unboxSegment(MemorySegment segment) {
+        checkNative(segment);
+        return segment.address();
+    }
+
+    public static void checkExceptions(MethodHandle target) {
+        Class<?>[] exceptions = JLIA.exceptionTypes(target);
+        if (exceptions != null && exceptions.length != 0) {
+            throw new IllegalArgumentException("Target handle may throw exceptions: " + Arrays.toString(exceptions));
+        }
+    }
+
+    public static MethodHandle maybeInsertAllocator(FunctionDescriptor descriptor, MethodHandle handle) {
+        if (descriptor.returnLayout().isEmpty() || !(descriptor.returnLayout().get() instanceof GroupLayout)) {
+            // not returning segment, just insert a throwing allocator
+            handle = insertArguments(handle, 1, THROWING_ALLOCATOR);
+        }
+        return handle;
+    }
+
+    public static MethodHandle maybeCheckCaptureSegment(MethodHandle handle, LinkerOptions options) {
+        if (options.hasCapturedCallState()) {
+            // (<target address>, SegmentAllocator, <capture segment>, ...) -> ...
+            handle = MethodHandles.filterArguments(handle, 2, MH_CHECK_CAPTURE_SEGMENT);
+        }
+        return handle;
+    }
+
+    @ForceInline
+    public static MemorySegment checkCaptureSegment(MemorySegment captureSegment) {
+        Objects.requireNonNull(captureSegment);
+        if (captureSegment.equals(MemorySegment.NULL)) {
+            throw new IllegalArgumentException("Capture segment is NULL: " + captureSegment);
+        }
+        return captureSegment.asSlice(0, CapturableState.LAYOUT);
+    }
+
+    @ForceInline
+    public static void checkSymbol(MemorySegment symbol) {
+        Objects.requireNonNull(symbol);
+        if (symbol.equals(MemorySegment.NULL))
+            throw new IllegalArgumentException("Symbol is NULL: " + symbol);
+    }
+
+    static void checkType(Class<?> actualType, Class<?> expectedType) {
+        if (expectedType != actualType) {
+            throw new IllegalArgumentException(
+                    String.format("Invalid operand type: %s. %s expected", actualType, expectedType));
+        }
+    }
+
+    public static boolean isPowerOfTwo(int width) {
+        return Integer.bitCount(width) == 1;
+    }
+
+    static long pickChunkOffset(long chunkOffset, long byteWidth, int chunkWidth) {
+        return ByteOrder.nativeOrder() == ByteOrder.BIG_ENDIAN
+                ? byteWidth - chunkWidth - chunkOffset
+                : chunkOffset;
+    }
+
+    public static Arena newBoundedArena(long size) {
+        return new Arena() {
+            final Arena arena = Arena.ofConfined();
+            final SegmentAllocator slicingAllocator = SegmentAllocator.slicingAllocator(arena.allocate(size));
+
+            @Override
+            public Scope scope() {
+                return arena.scope();
+            }
+
+            @Override
+            public void close() {
+                arena.close();
+            }
+
+            @Override
+            public MemorySegment allocate(long byteSize, long byteAlignment) {
+                return slicingAllocator.allocate(byteSize, byteAlignment);
+            }
+        };
+    }
+
+    public static Arena newEmptyArena() {
+        return new Arena() {
+            final Arena arena = Arena.ofConfined();
+
+            @Override
+            public Scope scope() {
+                return arena.scope();
+            }
+
+            @Override
+            public void close() {
+                arena.close();
+            }
+
+            @Override
+            public MemorySegment allocate(long byteSize, long byteAlignment) {
+                throw new UnsupportedOperationException();
+            }
+        };
+    }
+
+    static void writeOverSized(MemorySegment ptr, Class<?> type, Object o) {
+        // use VH_LONG for integers to zero out the whole register in the process
+        if (type == long.class) {
+            ptr.set(JAVA_LONG_UNALIGNED, 0, (long) o);
+        } else if (type == int.class) {
+            ptr.set(JAVA_LONG_UNALIGNED, 0, (int) o);
+        } else if (type == short.class) {
+            ptr.set(JAVA_LONG_UNALIGNED, 0, (short) o);
+        } else if (type == char.class) {
+            ptr.set(JAVA_LONG_UNALIGNED, 0, (char) o);
+        } else if (type == byte.class) {
+            ptr.set(JAVA_LONG_UNALIGNED, 0, (byte) o);
+        } else if (type == float.class) {
+            ptr.set(JAVA_FLOAT_UNALIGNED, 0, (float) o);
+        } else if (type == double.class) {
+            ptr.set(JAVA_DOUBLE_UNALIGNED, 0, (double) o);
+        } else if (type == boolean.class) {
+            boolean b = (boolean)o;
+            ptr.set(JAVA_LONG_UNALIGNED, 0, b ? (long)1 : (long)0);
+        } else {
+            throw new IllegalArgumentException("Unsupported carrier: " + type);
+        }
+    }
+
+    static void write(MemorySegment ptr, long offset, Class<?> type, Object o) {
+        if (type == long.class) {
+            ptr.set(JAVA_LONG_UNALIGNED, offset, (long) o);
+        } else if (type == int.class) {
+            ptr.set(JAVA_INT_UNALIGNED, offset, (int) o);
+        } else if (type == short.class) {
+            ptr.set(JAVA_SHORT_UNALIGNED, offset, (short) o);
+        } else if (type == char.class) {
+            ptr.set(JAVA_CHAR_UNALIGNED, offset, (char) o);
+        } else if (type == byte.class) {
+            ptr.set(JAVA_BYTE, offset, (byte) o);
+        } else if (type == float.class) {
+            ptr.set(JAVA_FLOAT_UNALIGNED, offset, (float) o);
+        } else if (type == double.class) {
+            ptr.set(JAVA_DOUBLE_UNALIGNED, offset, (double) o);
+        } else if (type == boolean.class) {
+            ptr.set(JAVA_BOOLEAN, offset, (boolean) o);
+        } else {
+            throw new IllegalArgumentException("Unsupported carrier: " + type);
+        }
+    }
+
+    static Object read(MemorySegment ptr, long offset, Class<?> type) {
+        if (type == long.class) {
+            return ptr.get(JAVA_LONG_UNALIGNED, offset);
+        } else if (type == int.class) {
+            return ptr.get(JAVA_INT_UNALIGNED, offset);
+        } else if (type == short.class) {
+            return ptr.get(JAVA_SHORT_UNALIGNED, offset);
+        } else if (type == char.class) {
+            return ptr.get(JAVA_CHAR_UNALIGNED, offset);
+        } else if (type == byte.class) {
+            return ptr.get(JAVA_BYTE, offset);
+        } else if (type == float.class) {
+            return ptr.get(JAVA_FLOAT_UNALIGNED, offset);
+        } else if (type == double.class) {
+            return ptr.get(JAVA_DOUBLE_UNALIGNED, offset);
+        } else if (type == boolean.class) {
+            return ptr.get(JAVA_BOOLEAN, offset);
+        } else {
+            throw new IllegalArgumentException("Unsupported carrier: " + type);
+        }
+    }
+
+    public static Map<String, MemoryLayout> canonicalLayouts(ValueLayout longLayout, ValueLayout sizetLayout, ValueLayout wchartLayout) {
+        return Map.ofEntries(
+                // specified canonical layouts
+                Map.entry("bool", ValueLayout.JAVA_BOOLEAN),
+                Map.entry("char", ValueLayout.JAVA_BYTE),
+                Map.entry("short", ValueLayout.JAVA_SHORT),
+                Map.entry("int", ValueLayout.JAVA_INT),
+                Map.entry("float", ValueLayout.JAVA_FLOAT),
+                Map.entry("long", longLayout),
+                Map.entry("long long", ValueLayout.JAVA_LONG),
+                Map.entry("double", ValueLayout.JAVA_DOUBLE),
+                Map.entry("void*", ValueLayout.ADDRESS),
+                Map.entry("size_t", sizetLayout),
+                Map.entry("wchar_t", wchartLayout),
+                // unspecified size-dependent layouts
+                Map.entry("int8_t", ValueLayout.JAVA_BYTE),
+                Map.entry("int16_t", ValueLayout.JAVA_SHORT),
+                Map.entry("int32_t", ValueLayout.JAVA_INT),
+                Map.entry("int64_t", ValueLayout.JAVA_LONG),
+                // unspecified JNI layouts
+                Map.entry("jboolean", ValueLayout.JAVA_BOOLEAN),
+                Map.entry("jchar", ValueLayout.JAVA_CHAR),
+                Map.entry("jbyte", ValueLayout.JAVA_BYTE),
+                Map.entry("jshort", ValueLayout.JAVA_SHORT),
+                Map.entry("jint", ValueLayout.JAVA_INT),
+                Map.entry("jlong", ValueLayout.JAVA_LONG),
+                Map.entry("jfloat", ValueLayout.JAVA_FLOAT),
+                Map.entry("jdouble", ValueLayout.JAVA_DOUBLE)
+        );
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/foreign/abi/SoftReferenceCache$Node.class b/tests/test_data/std/jdk/internal/foreign/abi/SoftReferenceCache$Node.class
new file mode 100644
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diff --git a/tests/test_data/std/jdk/internal/foreign/abi/SoftReferenceCache.class b/tests/test_data/std/jdk/internal/foreign/abi/SoftReferenceCache.class
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diff --git a/tests/test_data/std/jdk/internal/foreign/abi/SoftReferenceCache.java b/tests/test_data/std/jdk/internal/foreign/abi/SoftReferenceCache.java
new file mode 100644
index 00000000..04565c66
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/foreign/abi/SoftReferenceCache.java
@@ -0,0 +1,57 @@
+/*
+ * Copyright (c) 2022, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package jdk.internal.foreign.abi;
+
+import java.lang.ref.SoftReference;
+import java.util.Map;
+import java.util.concurrent.ConcurrentHashMap;
+import java.util.function.Function;
+
+final class SoftReferenceCache<K, V> {
+    private final Map<K, Node> cache = new ConcurrentHashMap<>();
+
+    public V get(K key, Function<K, V> valueFactory) {
+        return cache
+                .computeIfAbsent(key, k -> new Node()) // short lock (has to be according to ConcurrentHashMap)
+                .get(key, valueFactory); // long lock, but just for the particular key
+    }
+
+    private final class Node {
+        private volatile SoftReference<V> ref;
+
+        V get(K key, Function<K, V> valueFactory) {
+            V result;
+            if (ref == null || (result = ref.get()) == null) {
+                synchronized (this) { // don't let threads race on the valueFactory::apply call
+                    if (ref == null || (result = ref.get()) == null) {
+                        result = valueFactory.apply(key); // keep alive
+                        ref = new SoftReference<>(result);
+                    }
+                }
+            }
+            return result;
+        }
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/foreign/abi/StubLocations.class b/tests/test_data/std/jdk/internal/foreign/abi/StubLocations.class
new file mode 100644
index 0000000000000000000000000000000000000000..e563b5f55e9b401449f4945eff042196216b6e05
GIT binary patch
literal 1467
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zzt=H|c*(19nEWm(hyLkZa9mOpER9$6<t61v079Vu9OISIpf7QP=qV=u%rgp}=TIBk
zVJ9an;x$-M;!WQnOhO<eFzo#bR&lrBRw_aZqEhj+=w>+aRl$5%0?&zOQ|vg;oRe=T
z?mk807;eXy792x#jE5e_kk0Vv7y&Ltn=|D2k0C(1g-N+7L@4EU-5F#F=R)o$sgF4~

literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/foreign/abi/StubLocations.java b/tests/test_data/std/jdk/internal/foreign/abi/StubLocations.java
new file mode 100644
index 00000000..e3a45250
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/foreign/abi/StubLocations.java
@@ -0,0 +1,36 @@
+/*
+ * Copyright (c) 2022, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package jdk.internal.foreign.abi;
+
+// must keep in sync with StubLocations in VM code
+public enum StubLocations {
+    TARGET_ADDRESS,
+    RETURN_BUFFER,
+    CAPTURED_STATE_BUFFER;
+
+    public VMStorage storage(byte type) {
+        return new VMStorage(type, (short) 8, ordinal());
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/foreign/abi/UpcallLinker$CallRegs.class b/tests/test_data/std/jdk/internal/foreign/abi/UpcallLinker$CallRegs.class
new file mode 100644
index 0000000000000000000000000000000000000000..38e6626c6cb17c37c11bcc966d24b34f4614e8ad
GIT binary patch
literal 1809
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/foreign/abi/UpcallLinker$InvocationData.class b/tests/test_data/std/jdk/internal/foreign/abi/UpcallLinker$InvocationData.class
new file mode 100644
index 0000000000000000000000000000000000000000..4dd1736193539c5ed389ec680ef2133d5d1c5ffe
GIT binary patch
literal 3218
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/foreign/abi/UpcallLinker.class b/tests/test_data/std/jdk/internal/foreign/abi/UpcallLinker.class
new file mode 100644
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diff --git a/tests/test_data/std/jdk/internal/foreign/abi/UpcallLinker.java b/tests/test_data/std/jdk/internal/foreign/abi/UpcallLinker.java
new file mode 100644
index 00000000..272cfc3c
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/foreign/abi/UpcallLinker.java
@@ -0,0 +1,219 @@
+/*
+ * Copyright (c) 2020, 2023, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package jdk.internal.foreign.abi;
+
+import jdk.internal.foreign.abi.AbstractLinker.UpcallStubFactory;
+import sun.security.action.GetPropertyAction;
+
+import java.lang.foreign.Arena;
+import java.lang.foreign.MemorySegment;
+import java.lang.invoke.MethodHandle;
+import java.lang.invoke.MethodHandles;
+import java.lang.invoke.MethodType;
+import java.util.Arrays;
+import java.util.Map;
+import java.util.Objects;
+import java.util.function.UnaryOperator;
+import java.util.stream.Stream;
+
+import static java.lang.invoke.MethodHandles.exactInvoker;
+import static java.lang.invoke.MethodHandles.insertArguments;
+import static java.lang.invoke.MethodHandles.lookup;
+import static java.lang.invoke.MethodType.methodType;
+import static sun.security.action.GetBooleanAction.privilegedGetProperty;
+
+public class UpcallLinker {
+    private static final boolean DEBUG =
+        privilegedGetProperty("jdk.internal.foreign.UpcallLinker.DEBUG");
+    private static final boolean USE_SPEC = Boolean.parseBoolean(
+        GetPropertyAction.privilegedGetProperty("jdk.internal.foreign.UpcallLinker.USE_SPEC", "true"));
+
+    private static final MethodHandle MH_invokeInterpBindings;
+
+    static {
+        try {
+            MethodHandles.Lookup lookup = lookup();
+            MH_invokeInterpBindings = lookup.findStatic(UpcallLinker.class, "invokeInterpBindings",
+                    methodType(Object.class, MethodHandle.class, Object[].class, InvocationData.class));
+        } catch (ReflectiveOperationException e) {
+            throw new InternalError(e);
+        }
+    }
+
+    public static UpcallStubFactory makeFactory(MethodType targetType, ABIDescriptor abi, CallingSequence callingSequence) {
+        assert callingSequence.forUpcall();
+        Binding.VMLoad[] argMoves = argMoveBindings(callingSequence);
+        Binding.VMStore[] retMoves = retMoveBindings(callingSequence);
+
+        MethodType llType = callingSequence.callerMethodType();
+
+        UnaryOperator<MethodHandle> doBindingsMaker;
+        if (USE_SPEC) {
+            MethodHandle doBindings = BindingSpecializer.specializeUpcall(targetType, callingSequence, abi);
+            doBindingsMaker = target -> {
+                MethodHandle handle = MethodHandles.insertArguments(doBindings, 0, target);
+                assert handle.type() == llType;
+                return handle;
+            };
+        } else {
+            Map<VMStorage, Integer> argIndices = SharedUtils.indexMap(argMoves);
+            Map<VMStorage, Integer> retIndices = SharedUtils.indexMap(retMoves);
+            int spreaderCount = callingSequence.calleeMethodType().parameterCount();
+            if (callingSequence.needsReturnBuffer()) {
+                spreaderCount--; // return buffer is dropped from the argument list
+            }
+            final int finalSpreaderCount = spreaderCount;
+            InvocationData invData = new InvocationData(argIndices, retIndices, callingSequence, retMoves, abi);
+            MethodHandle doBindings = insertArguments(MH_invokeInterpBindings, 2, invData);
+            doBindingsMaker = target -> {
+                target = target.asSpreader(Object[].class, finalSpreaderCount);
+                MethodHandle handle = MethodHandles.insertArguments(doBindings, 0, target);
+                handle = handle.asCollector(Object[].class, llType.parameterCount());
+                return handle.asType(llType);
+            };
+        }
+
+        VMStorage[] args = Arrays.stream(argMoves).map(Binding.Move::storage).toArray(VMStorage[]::new);
+        VMStorage[] rets = Arrays.stream(retMoves).map(Binding.Move::storage).toArray(VMStorage[]::new);
+        CallRegs conv = new CallRegs(args, rets);
+        return (target, scope) -> {
+            assert target.type() == targetType;
+            MethodHandle doBindings = doBindingsMaker.apply(target);
+            checkPrimitive(doBindings.type());
+            doBindings = insertArguments(exactInvoker(doBindings.type()), 0, doBindings);
+            long entryPoint = makeUpcallStub(doBindings, abi, conv,
+                    callingSequence.needsReturnBuffer(), callingSequence.returnBufferSize());
+            if (entryPoint == 0) {
+                throw new OutOfMemoryError("Failed to allocate upcall stub");
+            }
+            return UpcallStubs.makeUpcall(entryPoint, scope);
+        };
+    }
+
+    private static void checkPrimitive(MethodType type) {
+        if (!type.returnType().isPrimitive()
+                || type.parameterList().stream().anyMatch(p -> !p.isPrimitive()))
+            throw new IllegalArgumentException("MethodHandle type must be primitive: " + type);
+    }
+
+    private static Stream<Binding.VMLoad> argMoveBindingsStream(CallingSequence callingSequence) {
+        return callingSequence.argumentBindings()
+                .filter(Binding.VMLoad.class::isInstance)
+                .map(Binding.VMLoad.class::cast);
+    }
+
+    private static Binding.VMLoad[] argMoveBindings(CallingSequence callingSequence) {
+        return argMoveBindingsStream(callingSequence)
+                .toArray(Binding.VMLoad[]::new);
+    }
+
+    private static Binding.VMStore[] retMoveBindings(CallingSequence callingSequence) {
+        return callingSequence.returnBindings().stream()
+                .filter(Binding.VMStore.class::isInstance)
+                .map(Binding.VMStore.class::cast)
+                .toArray(Binding.VMStore[]::new);
+    }
+
+    private record InvocationData(Map<VMStorage, Integer> argIndexMap,
+                                  Map<VMStorage, Integer> retIndexMap,
+                                  CallingSequence callingSequence,
+                                  Binding.VMStore[] retMoves,
+                                  ABIDescriptor abi) {}
+
+    private static Object invokeInterpBindings(MethodHandle leaf, Object[] lowLevelArgs, InvocationData invData) throws Throwable {
+        Arena allocator = invData.callingSequence.allocationSize() != 0
+                ? SharedUtils.newBoundedArena(invData.callingSequence.allocationSize())
+                : SharedUtils.newEmptyArena();
+        try (allocator) {
+            /// Invoke interpreter, got array of high-level arguments back
+            Object[] highLevelArgs = new Object[invData.callingSequence.calleeMethodType().parameterCount()];
+            for (int i = 0; i < highLevelArgs.length; i++) {
+                highLevelArgs[i] = BindingInterpreter.box(invData.callingSequence.argumentBindings(i),
+                        (storage, type) -> lowLevelArgs[invData.argIndexMap.get(storage)], allocator);
+            }
+
+            MemorySegment returnBuffer = null;
+            if (invData.callingSequence.needsReturnBuffer()) {
+                // this one is for us
+                returnBuffer = (MemorySegment) highLevelArgs[0];
+                Object[] newArgs = new Object[highLevelArgs.length - 1];
+                System.arraycopy(highLevelArgs, 1, newArgs, 0, newArgs.length);
+                highLevelArgs = newArgs;
+            }
+
+            if (DEBUG) {
+                System.err.println("Java arguments:");
+                System.err.println(Arrays.toString(highLevelArgs).indent(2));
+            }
+
+            // invoke our target
+            Object o = leaf.invoke(highLevelArgs);
+
+            if (DEBUG) {
+                System.err.println("Java return:");
+                System.err.println(Objects.toString(o).indent(2));
+            }
+
+            Object[] returnValues = new Object[invData.retIndexMap.size()];
+            if (leaf.type().returnType() != void.class) {
+                BindingInterpreter.unbox(o, invData.callingSequence.returnBindings(),
+                        (storage, value) -> returnValues[invData.retIndexMap.get(storage)] = value, null);
+            }
+
+            if (returnValues.length == 0) {
+                return null;
+            } else if (returnValues.length == 1) {
+                return returnValues[0];
+            } else {
+                assert invData.callingSequence.needsReturnBuffer();
+
+                assert returnValues.length == invData.retMoves().length;
+                int retBufWriteOffset = 0;
+                for (int i = 0; i < invData.retMoves().length; i++) {
+                    Binding.VMStore store = invData.retMoves()[i];
+                    Object value = returnValues[i];
+                    SharedUtils.writeOverSized(returnBuffer.asSlice(retBufWriteOffset), store.type(), value);
+                    retBufWriteOffset += invData.abi.arch.typeSize(store.storage().type());
+                }
+                return null;
+            }
+        } catch(Throwable t) {
+            SharedUtils.handleUncaughtException(t);
+            return null;
+        }
+    }
+
+    // used for transporting data into native code
+    private record CallRegs(VMStorage[] argRegs, VMStorage[] retRegs) {}
+
+    static native long makeUpcallStub(MethodHandle mh, ABIDescriptor abi, CallRegs conv,
+                                      boolean needsReturnBuffer, long returnBufferSize);
+
+    private static native void registerNatives();
+    static {
+        registerNatives();
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/foreign/abi/UpcallStubs$1.class b/tests/test_data/std/jdk/internal/foreign/abi/UpcallStubs$1.class
new file mode 100644
index 0000000000000000000000000000000000000000..cdb817075469c44673ea3f0a7a02a5ca09140a81
GIT binary patch
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/foreign/abi/UpcallStubs.class b/tests/test_data/std/jdk/internal/foreign/abi/UpcallStubs.class
new file mode 100644
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A8UO$Q

literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/foreign/abi/UpcallStubs.java b/tests/test_data/std/jdk/internal/foreign/abi/UpcallStubs.java
new file mode 100644
index 00000000..2d4ccfe3
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/foreign/abi/UpcallStubs.java
@@ -0,0 +1,64 @@
+/*
+ * Copyright (c) 2020, 2024, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package jdk.internal.foreign.abi;
+
+import java.lang.foreign.MemorySegment;
+import java.lang.foreign.Arena;
+
+import jdk.internal.foreign.MemorySessionImpl;
+import jdk.internal.foreign.Utils;
+
+public final class UpcallStubs {
+
+    private UpcallStubs() {
+    }
+
+    private static void freeUpcallStub(long stubAddress) {
+        if (!freeUpcallStub0(stubAddress)) {
+            throw new IllegalStateException("Not a stub address: " + Utils.toHexString(stubAddress));
+        }
+    }
+
+    // natives
+
+    // returns true if the stub was found (and freed)
+    private static native boolean freeUpcallStub0(long addr);
+
+    private static native void registerNatives();
+    static {
+        registerNatives();
+    }
+
+    @SuppressWarnings("restricted")
+    static MemorySegment makeUpcall(long entry, Arena arena) {
+        MemorySessionImpl.toMemorySession(arena).addOrCleanupIfFail(new MemorySessionImpl.ResourceList.ResourceCleanup() {
+            @Override
+            public void cleanup() {
+                freeUpcallStub(entry);
+            }
+        });
+        return MemorySegment.ofAddress(entry).reinterpret(arena, null); // restricted
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/foreign/abi/VMStorage.class b/tests/test_data/std/jdk/internal/foreign/abi/VMStorage.class
new file mode 100644
index 0000000000000000000000000000000000000000..c033d64d152c0f4fbb3f5f9c8e09ff9c3abd229b
GIT binary patch
literal 2162
zcma)6QFGHq5dMxhmf|WTHiQs6fkG3ol@gT}TBuS=9ZE4IF`(2f@N~8>j$%i0C7Ega
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z0Y)wR1^w^Qsf9FQfP!9_U-%PquMSbj%^%>(!U3)yVCfL0cXWLY_vtUEF|dq0KE{`{
z(<3NMtkQ{$gw!nDNph)OkmC|#A?Y$nBx#4%aa!~GA(&p+hoaB#V^Uw(M^>Lp?PKPI
zGfhZfDdf8oq56FJK3_fzR`TUzKDm<tr|=a?vnf&qDS@s*7bKEHF3!SjS|yF5A5m!d
zowiZLNp>w#iP^K1@&{+Y4dAzt;CJzL3|}QO>AI>fAK|nA!e5GX`oXJsh;PUOqsYp!
zB_lio<N6;^hPg2wn_-lawKKqzqk%8<Q;=lNjs~9Xr#}gv8J7HGw^Mi&=J;DYrZrEG
p9MybO@lm};)&3pb=P1BUs&f@j@D$ImjtzWI@(jsq_z|x$_b;d^x1#_6

literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/foreign/abi/VMStorage.java b/tests/test_data/std/jdk/internal/foreign/abi/VMStorage.java
new file mode 100644
index 00000000..1237650e
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/foreign/abi/VMStorage.java
@@ -0,0 +1,46 @@
+/*
+ * Copyright (c) 2020, 2022, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package jdk.internal.foreign.abi;
+
+/**
+ *
+ * @param type              the type of storage. e.g. stack, or which register type (GP, FP, vector)
+ * @param segmentMaskOrSize the (on stack) size in bytes when type = stack, a register mask otherwise,
+ *                          the register mask indicates which segments of a register are used.
+ * @param indexOrOffset     the index is either a register number within a type, or
+ *                          a stack offset in bytes if type = stack.
+ *                          (a particular platform might add a bias to this in generate code)
+ * @param debugName         the debug name
+ */
+public record VMStorage(byte type,
+                        short segmentMaskOrSize,
+                        int indexOrOffset,
+                        String debugName) {
+
+    public VMStorage(byte type, short segmentMaskOrSize, int indexOrOffset) {
+        this(type, segmentMaskOrSize, indexOrOffset, "Stack@" + indexOrOffset);
+    }
+
+}
diff --git a/tests/test_data/std/jdk/internal/foreign/abi/aarch64/AArch64Architecture$Regs.class b/tests/test_data/std/jdk/internal/foreign/abi/aarch64/AArch64Architecture$Regs.class
new file mode 100644
index 0000000000000000000000000000000000000000..cff9b103874ab5c9f5d7c756e01d8a6a4bbde75e
GIT binary patch
literal 2927
zcma);S9DZW7=`yq0xA523rGjCpcIuM5I~9wf;2;s5=9Z5Btw`m%;01aiYV2N4Lf4T
zhFC$thKkq_J9hNJ<&(=N*Yd>&m;3B{^hwm0`^~<0?%cg+oqykR@Q;`G0hoXvDo}*t
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zTS(=z$xLE#E}u#_W)sP}bRwC|*Do1Softn}^v868zt@saIdt&1G^X;iQ;q3n-t5qS
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N@E@w=$b66TKLI_H6662?

literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/foreign/abi/aarch64/AArch64Architecture$StorageType.class b/tests/test_data/std/jdk/internal/foreign/abi/aarch64/AArch64Architecture$StorageType.class
new file mode 100644
index 0000000000000000000000000000000000000000..1bd71903509cc0205f10d3f95db2df7d7e6aee30
GIT binary patch
literal 431
zcmbV{%}#?r6ot=~7FybBtv}JdYiHBA77=Y@Q%oV<PjN($3}zTid^Hz7fDdIHSg~;B
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/foreign/abi/aarch64/AArch64Architecture.class b/tests/test_data/std/jdk/internal/foreign/abi/aarch64/AArch64Architecture.class
new file mode 100644
index 0000000000000000000000000000000000000000..430bec674dad96ec408332c140bc891c1ece4a64
GIT binary patch
literal 3497
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/foreign/abi/aarch64/AArch64Architecture.java b/tests/test_data/std/jdk/internal/foreign/abi/aarch64/AArch64Architecture.java
new file mode 100644
index 00000000..bfd8dd19
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/foreign/abi/aarch64/AArch64Architecture.java
@@ -0,0 +1,177 @@
+/*
+ * Copyright (c) 2020, 2023, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2019, Arm Limited. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package jdk.internal.foreign.abi.aarch64;
+
+import jdk.internal.foreign.abi.ABIDescriptor;
+import jdk.internal.foreign.abi.Architecture;
+import jdk.internal.foreign.abi.StubLocations;
+import jdk.internal.foreign.abi.VMStorage;
+
+public final class AArch64Architecture implements Architecture {
+    public static final Architecture INSTANCE = new AArch64Architecture();
+
+    private static final short REG64_MASK = 0b0000_0000_0000_0001;
+    private static final short V128_MASK = 0b0000_0000_0000_0001;
+
+    private static final int INTEGER_REG_SIZE = 8;
+    private static final int VECTOR_REG_SIZE = 16;
+
+    // Suppresses default constructor, ensuring non-instantiability.
+    private AArch64Architecture() {}
+
+    @Override
+    public boolean isStackType(int cls) {
+        return cls == StorageType.STACK;
+    }
+
+    @Override
+    public int typeSize(int cls) {
+        return switch (cls) {
+            case StorageType.INTEGER -> INTEGER_REG_SIZE;
+            case StorageType.VECTOR -> VECTOR_REG_SIZE;
+            // STACK is deliberately omitted
+            default -> throw new IllegalArgumentException("Invalid Storage Class: " + cls);
+        };
+    }
+
+    public interface StorageType {
+        byte INTEGER = 0;
+        byte VECTOR = 1;
+        byte STACK = 2;
+        byte PLACEHOLDER = 3;
+    }
+
+    public static class Regs { // break circular dependency
+        public static final VMStorage r0 = integerRegister(0);
+        public static final VMStorage r1 = integerRegister(1);
+        public static final VMStorage r2 = integerRegister(2);
+        public static final VMStorage r3 = integerRegister(3);
+        public static final VMStorage r4 = integerRegister(4);
+        public static final VMStorage r5 = integerRegister(5);
+        public static final VMStorage r6 = integerRegister(6);
+        public static final VMStorage r7 = integerRegister(7);
+        public static final VMStorage r8 = integerRegister(8);
+        public static final VMStorage r9 = integerRegister(9);
+        public static final VMStorage r10 = integerRegister(10);
+        public static final VMStorage r11 = integerRegister(11);
+        public static final VMStorage r12 = integerRegister(12);
+        public static final VMStorage r13 = integerRegister(13);
+        public static final VMStorage r14 = integerRegister(14);
+        public static final VMStorage r15 = integerRegister(15);
+        public static final VMStorage r16 = integerRegister(16);
+        public static final VMStorage r17 = integerRegister(17);
+        public static final VMStorage r18 = integerRegister(18);
+        public static final VMStorage r19 = integerRegister(19);
+        public static final VMStorage r20 = integerRegister(20);
+        public static final VMStorage r21 = integerRegister(21);
+        public static final VMStorage r22 = integerRegister(22);
+        public static final VMStorage r23 = integerRegister(23);
+        public static final VMStorage r24 = integerRegister(24);
+        public static final VMStorage r25 = integerRegister(25);
+        public static final VMStorage r26 = integerRegister(26);
+        public static final VMStorage r27 = integerRegister(27);
+        public static final VMStorage r28 = integerRegister(28);
+        public static final VMStorage r29 = integerRegister(29);
+        public static final VMStorage r30 = integerRegister(30);
+        public static final VMStorage r31 = integerRegister(31);
+        public static final VMStorage v0 = vectorRegister(0);
+        public static final VMStorage v1 = vectorRegister(1);
+        public static final VMStorage v2 = vectorRegister(2);
+        public static final VMStorage v3 = vectorRegister(3);
+        public static final VMStorage v4 = vectorRegister(4);
+        public static final VMStorage v5 = vectorRegister(5);
+        public static final VMStorage v6 = vectorRegister(6);
+        public static final VMStorage v7 = vectorRegister(7);
+        public static final VMStorage v8 = vectorRegister(8);
+        public static final VMStorage v9 = vectorRegister(9);
+        public static final VMStorage v10 = vectorRegister(10);
+        public static final VMStorage v11 = vectorRegister(11);
+        public static final VMStorage v12 = vectorRegister(12);
+        public static final VMStorage v13 = vectorRegister(13);
+        public static final VMStorage v14 = vectorRegister(14);
+        public static final VMStorage v15 = vectorRegister(15);
+        public static final VMStorage v16 = vectorRegister(16);
+        public static final VMStorage v17 = vectorRegister(17);
+        public static final VMStorage v18 = vectorRegister(18);
+        public static final VMStorage v19 = vectorRegister(19);
+        public static final VMStorage v20 = vectorRegister(20);
+        public static final VMStorage v21 = vectorRegister(21);
+        public static final VMStorage v22 = vectorRegister(22);
+        public static final VMStorage v23 = vectorRegister(23);
+        public static final VMStorage v24 = vectorRegister(24);
+        public static final VMStorage v25 = vectorRegister(25);
+        public static final VMStorage v26 = vectorRegister(26);
+        public static final VMStorage v27 = vectorRegister(27);
+        public static final VMStorage v28 = vectorRegister(28);
+        public static final VMStorage v29 = vectorRegister(29);
+        public static final VMStorage v30 = vectorRegister(30);
+        public static final VMStorage v31 = vectorRegister(31);
+    }
+
+    private static VMStorage integerRegister(int index) {
+        return new VMStorage(StorageType.INTEGER, REG64_MASK, index, "r" + index);
+    }
+
+    private static VMStorage vectorRegister(int index) {
+        return new VMStorage(StorageType.VECTOR, V128_MASK, index, "v" + index);
+    }
+
+    public static VMStorage stackStorage(short size, int byteOffset) {
+        return new VMStorage(StorageType.STACK, size, byteOffset);
+    }
+
+    public static ABIDescriptor abiFor(VMStorage[] inputIntRegs,
+                                       VMStorage[] inputVectorRegs,
+                                       VMStorage[] outputIntRegs,
+                                       VMStorage[] outputVectorRegs,
+                                       VMStorage[] volatileIntRegs,
+                                       VMStorage[] volatileVectorRegs,
+                                       int stackAlignment,
+                                       int shadowSpace,
+                                       VMStorage scratch1, VMStorage scratch2) {
+        return new ABIDescriptor(
+            INSTANCE,
+            new VMStorage[][] {
+                inputIntRegs,
+                inputVectorRegs,
+            },
+            new VMStorage[][] {
+                outputIntRegs,
+                outputVectorRegs,
+            },
+            new VMStorage[][] {
+                volatileIntRegs,
+                volatileVectorRegs,
+            },
+            stackAlignment,
+            shadowSpace,
+            scratch1, scratch2,
+            StubLocations.TARGET_ADDRESS.storage(StorageType.PLACEHOLDER),
+            StubLocations.RETURN_BUFFER.storage(StorageType.PLACEHOLDER),
+            StubLocations.CAPTURED_STATE_BUFFER.storage(StorageType.PLACEHOLDER));
+    }
+
+}
diff --git a/tests/test_data/std/jdk/internal/foreign/abi/aarch64/CallArranger$1.class b/tests/test_data/std/jdk/internal/foreign/abi/aarch64/CallArranger$1.class
new file mode 100644
index 0000000000000000000000000000000000000000..1caaa0b5b7eed80e2571997c61c795a6da03c90c
GIT binary patch
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diff --git a/tests/test_data/std/jdk/internal/foreign/abi/aarch64/CallArranger$BindingCalculator.class b/tests/test_data/std/jdk/internal/foreign/abi/aarch64/CallArranger$BindingCalculator.class
new file mode 100644
index 0000000000000000000000000000000000000000..8ec6edc390f32b6ea5cd3a54432a61af373b01f8
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diff --git a/tests/test_data/std/jdk/internal/foreign/abi/aarch64/CallArranger$Bindings.class b/tests/test_data/std/jdk/internal/foreign/abi/aarch64/CallArranger$Bindings.class
new file mode 100644
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diff --git a/tests/test_data/std/jdk/internal/foreign/abi/aarch64/CallArranger$BoxBindingCalculator.class b/tests/test_data/std/jdk/internal/foreign/abi/aarch64/CallArranger$BoxBindingCalculator.class
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diff --git a/tests/test_data/std/jdk/internal/foreign/abi/aarch64/CallArranger$StorageCalculator$StructStorage.class b/tests/test_data/std/jdk/internal/foreign/abi/aarch64/CallArranger$StorageCalculator$StructStorage.class
new file mode 100644
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diff --git a/tests/test_data/std/jdk/internal/foreign/abi/aarch64/CallArranger$StorageCalculator.class b/tests/test_data/std/jdk/internal/foreign/abi/aarch64/CallArranger$StorageCalculator.class
new file mode 100644
index 0000000000000000000000000000000000000000..4e6c7e2d5806ad5af530fa6ac35ea2b0bd2802ec
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diff --git a/tests/test_data/std/jdk/internal/foreign/abi/aarch64/CallArranger$UnboxBindingCalculator.class b/tests/test_data/std/jdk/internal/foreign/abi/aarch64/CallArranger$UnboxBindingCalculator.class
new file mode 100644
index 0000000000000000000000000000000000000000..4183abd0489cd74e5d1a552c10a85182de2d78d3
GIT binary patch
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diff --git a/tests/test_data/std/jdk/internal/foreign/abi/aarch64/CallArranger.class b/tests/test_data/std/jdk/internal/foreign/abi/aarch64/CallArranger.class
new file mode 100644
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diff --git a/tests/test_data/std/jdk/internal/foreign/abi/aarch64/CallArranger.java b/tests/test_data/std/jdk/internal/foreign/abi/aarch64/CallArranger.java
new file mode 100644
index 00000000..9eb4910e
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/foreign/abi/aarch64/CallArranger.java
@@ -0,0 +1,523 @@
+/*
+ * Copyright (c) 2020, 2023, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2019, 2022, Arm Limited. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package jdk.internal.foreign.abi.aarch64;
+
+import java.lang.foreign.AddressLayout;
+import java.lang.foreign.FunctionDescriptor;
+import java.lang.foreign.GroupLayout;
+import java.lang.foreign.MemoryLayout;
+import java.lang.foreign.MemorySegment;
+import jdk.internal.foreign.abi.ABIDescriptor;
+import jdk.internal.foreign.abi.AbstractLinker.UpcallStubFactory;
+import jdk.internal.foreign.abi.Binding;
+import jdk.internal.foreign.abi.CallingSequence;
+import jdk.internal.foreign.abi.CallingSequenceBuilder;
+import jdk.internal.foreign.abi.DowncallLinker;
+import jdk.internal.foreign.abi.LinkerOptions;
+import jdk.internal.foreign.abi.SharedUtils;
+import jdk.internal.foreign.abi.VMStorage;
+import jdk.internal.foreign.abi.aarch64.linux.LinuxAArch64CallArranger;
+import jdk.internal.foreign.abi.aarch64.macos.MacOsAArch64CallArranger;
+import jdk.internal.foreign.abi.aarch64.windows.WindowsAArch64CallArranger;
+import jdk.internal.foreign.Utils;
+
+import java.lang.foreign.ValueLayout;
+import java.lang.invoke.MethodHandle;
+import java.lang.invoke.MethodType;
+import java.util.List;
+import java.util.Optional;
+
+import static jdk.internal.foreign.abi.aarch64.AArch64Architecture.*;
+import static jdk.internal.foreign.abi.aarch64.AArch64Architecture.Regs.*;
+
+/**
+ * For the AArch64 C ABI specifically, this class uses CallingSequenceBuilder
+ * to translate a C FunctionDescriptor into a CallingSequence, which can then be turned into a MethodHandle.
+ *
+ * This includes taking care of synthetic arguments like pointers to return buffers for 'in-memory' returns.
+ *
+ * There are minor differences between the ABIs implemented on Linux, macOS, and Windows
+ * which are handled in sub-classes. Clients should access these through the provided
+ * public constants CallArranger.LINUX, CallArranger.MACOS, and CallArranger.WINDOWS.
+ */
+public abstract class CallArranger {
+    private static final int STACK_SLOT_SIZE = 8;
+    private static final int MAX_COPY_SIZE = 8;
+    public static final int MAX_REGISTER_ARGUMENTS = 8;
+
+    private static final VMStorage INDIRECT_RESULT = r8;
+
+    // This is derived from the AAPCS64 spec, restricted to what's
+    // possible when calling to/from C code.
+    //
+    // The indirect result register, r8, is used to return a large
+    // struct by value. It's treated as an input here as the caller is
+    // responsible for allocating storage and passing this into the
+    // function.
+    //
+    // Although the AAPCS64 says r0-7 and v0-7 are all valid return
+    // registers, it's not possible to generate a C function that uses
+    // r2-7 and v4-7 so, they are omitted here.
+    protected static final ABIDescriptor C = abiFor(
+        new VMStorage[] { r0, r1, r2, r3, r4, r5, r6, r7, INDIRECT_RESULT},
+        new VMStorage[] { v0, v1, v2, v3, v4, v5, v6, v7 },
+        new VMStorage[] { r0, r1 },
+        new VMStorage[] { v0, v1, v2, v3 },
+        new VMStorage[] { r9, r10, r11, r12, r13, r14, r15 },
+        new VMStorage[] { v16, v17, v18, v19, v20, v21, v22, v23, v24, v25,
+                          v26, v27, v28, v29, v30, v31 },
+        16,  // Stack is always 16 byte aligned on AArch64
+        0,   // No shadow space
+        r9, r10  // scratch 1 & 2
+    );
+
+    public record Bindings(CallingSequence callingSequence,
+                           boolean isInMemoryReturn) {
+    }
+
+    public static final CallArranger LINUX = new LinuxAArch64CallArranger();
+    public static final CallArranger MACOS = new MacOsAArch64CallArranger();
+    public static final CallArranger WINDOWS = new WindowsAArch64CallArranger();
+
+    /**
+     * Are variadic arguments assigned to registers as in the standard calling
+     * convention, or always passed on the stack?
+     *
+     * @return true if variadic arguments should be spilled to the stack.
+      */
+     protected abstract boolean varArgsOnStack();
+
+    /**
+     * {@return true if this ABI requires sub-slot (smaller than STACK_SLOT_SIZE) packing of arguments on the stack.}
+     */
+    protected abstract boolean requiresSubSlotStackPacking();
+
+    /**
+     * Are floating point arguments to variadic functions passed in general purpose registers
+     * instead of floating point registers?
+     *
+     * {@return true if this ABI uses general purpose registers for variadic floating point arguments.}
+     */
+    protected abstract boolean useIntRegsForVariadicFloatingPointArgs();
+
+    /**
+     * Should some fields of structs that assigned to registers be passed in registers when there
+     * are not enough registers for all the fields of the struct?
+     *
+     * {@return true if this ABI passes some fields of a struct in registers.}
+     */
+    protected abstract boolean spillsVariadicStructsPartially();
+
+    /**
+     * @return The ABIDescriptor used by the CallArranger for the current platform.
+     */
+    protected abstract ABIDescriptor abiDescriptor();
+
+    protected TypeClass getArgumentClassForBindings(MemoryLayout layout, boolean forVariadicFunction) {
+        return TypeClass.classifyLayout(layout);
+    }
+
+    protected CallArranger() {}
+
+    public Bindings getBindings(MethodType mt, FunctionDescriptor cDesc, boolean forUpcall) {
+        return getBindings(mt, cDesc, forUpcall, LinkerOptions.empty());
+    }
+
+    public Bindings getBindings(MethodType mt, FunctionDescriptor cDesc, boolean forUpcall, LinkerOptions options) {
+        CallingSequenceBuilder csb = new CallingSequenceBuilder(abiDescriptor(), forUpcall, options);
+
+        boolean forVariadicFunction = options.isVariadicFunction();
+
+        BindingCalculator argCalc = forUpcall ? new BoxBindingCalculator(true) : new UnboxBindingCalculator(true, forVariadicFunction, options.allowsHeapAccess());
+        BindingCalculator retCalc = forUpcall ? new UnboxBindingCalculator(false, forVariadicFunction, false) : new BoxBindingCalculator(false);
+
+        boolean returnInMemory = isInMemoryReturn(cDesc.returnLayout());
+        if (returnInMemory) {
+            csb.addArgumentBindings(MemorySegment.class, SharedUtils.C_POINTER,
+                    argCalc.getIndirectBindings());
+        } else if (cDesc.returnLayout().isPresent()) {
+            Class<?> carrier = mt.returnType();
+            MemoryLayout layout = cDesc.returnLayout().get();
+            csb.setReturnBindings(carrier, layout, retCalc.getBindings(carrier, layout));
+        }
+
+        for (int i = 0; i < mt.parameterCount(); i++) {
+            Class<?> carrier = mt.parameterType(i);
+            MemoryLayout layout = cDesc.argumentLayouts().get(i);
+            if (varArgsOnStack() && options.isVarargsIndex(i)) {
+                argCalc.storageCalculator.adjustForVarArgs();
+            }
+            csb.addArgumentBindings(carrier, layout, argCalc.getBindings(carrier, layout));
+        }
+
+        return new Bindings(csb.build(), returnInMemory);
+    }
+
+    public MethodHandle arrangeDowncall(MethodType mt, FunctionDescriptor cDesc, LinkerOptions options) {
+        Bindings bindings = getBindings(mt, cDesc, false, options);
+
+        MethodHandle handle = new DowncallLinker(abiDescriptor(), bindings.callingSequence).getBoundMethodHandle();
+
+        if (bindings.isInMemoryReturn) {
+            handle = SharedUtils.adaptDowncallForIMR(handle, cDesc, bindings.callingSequence);
+        }
+
+        return handle;
+    }
+
+    public UpcallStubFactory arrangeUpcall(MethodType mt, FunctionDescriptor cDesc,
+                                                          LinkerOptions options) {
+        Bindings bindings = getBindings(mt, cDesc, true, options);
+        final boolean dropReturn = true; /* drop return, since we don't have bindings for it */
+        return SharedUtils.arrangeUpcallHelper(mt, bindings.isInMemoryReturn, dropReturn, abiDescriptor(),
+                bindings.callingSequence);
+    }
+
+    private static boolean isInMemoryReturn(Optional<MemoryLayout> returnLayout) {
+        return returnLayout
+            .filter(GroupLayout.class::isInstance)
+            .filter(g -> TypeClass.classifyLayout(g) == TypeClass.STRUCT_REFERENCE)
+            .isPresent();
+    }
+
+    class StorageCalculator {
+        private final boolean forArguments;
+        private final boolean forVariadicFunction;
+        private boolean forVarArgs = false;
+
+        private final int[] nRegs = new int[] { 0, 0 };
+        private long stackOffset = 0;
+
+        public StorageCalculator(boolean forArguments, boolean forVariadicFunction) {
+            this.forArguments = forArguments;
+            this.forVariadicFunction = forVariadicFunction;
+        }
+
+        private boolean hasRegister(int type) {
+            return hasEnoughRegisters(type, 1);
+        }
+
+        private boolean hasEnoughRegisters(int type, int count) {
+            return nRegs[type] + count <= MAX_REGISTER_ARGUMENTS;
+        }
+
+        private static Class<?> adjustCarrierForStack(Class<?> carrier) {
+            if (carrier == float.class) {
+                carrier = int.class;
+            } else if (carrier == double.class) {
+                carrier = long.class;
+            }
+            return carrier;
+        }
+
+        record StructStorage(long offset, Class<?> carrier, int byteWidth, VMStorage storage) {}
+
+        /*
+        In the simplest case structs are copied in chunks. i.e. the fields don't matter, just the size.
+        The struct is split into 8-byte chunks, and those chunks are either passed in registers and/or on the stack.
+
+        Homogeneous float aggregates (HFAs) can be copied in a field-wise manner, i.e. the struct is split into it's
+        fields and those fields are the chunks which are passed. For HFAs the rules are more complicated and ABI based:
+
+                        | enough registers | some registers, but not enough  | no registers
+        ----------------+------------------+---------------------------------+-------------------------
+        Linux           | FW in regs       | CW on the stack                 | CW on the stack
+        macOS, non-VA   | FW in regs       | FW on the stack                 | FW on the stack
+        macOS, VA       | FW in regs       | CW on the stack                 | CW on the stack
+        Windows, non-VF | FW in regs       | CW on the stack                 | CW on the stack
+        Windows, VF     | FW in regs       | CW split between regs and stack | CW on the stack
+        (where FW = Field-wise copy, CW = Chunk-wise copy, VA is a variadic argument, and VF is a variadic function)
+
+        For regular structs, the rules are as follows:
+
+                        | enough registers | some registers, but not enough  | no registers
+        ----------------+------------------+---------------------------------+-------------------------
+        Linux           | CW in regs       | CW on the stack                 | CW on the stack
+        macOS           | CW in regs       | CW on the stack                 | CW on the stack
+        Windows, non-VF | CW in regs       | CW on the stack                 | CW on the stack
+        Windows, VF     | CW in regs       | CW split between regs and stack | CW on the stack
+         */
+        StructStorage[] structStorages(GroupLayout layout, boolean forHFA) {
+            int numChunks = (int)Utils.alignUp(layout.byteSize(), MAX_COPY_SIZE) / MAX_COPY_SIZE;
+
+            int regType = StorageType.INTEGER;
+            List<MemoryLayout> scalarLayouts = null;
+            int requiredStorages = numChunks;
+            if (forHFA) {
+                regType = StorageType.VECTOR;
+                scalarLayouts = TypeClass.scalarLayouts(layout);
+                requiredStorages = scalarLayouts.size();
+            }
+
+            boolean hasEnoughRegisters = hasEnoughRegisters(regType, requiredStorages);
+
+            // For the ABI variants that pack arguments spilled to the
+            // stack, HFA arguments are spilled as if their individual
+            // fields had been allocated separately rather than as if the
+            // struct had been spilled as a whole.
+            boolean useFieldWiseSpill = requiresSubSlotStackPacking() && !forVarArgs;
+            boolean isFieldWise = forHFA && (hasEnoughRegisters || useFieldWiseSpill);
+            if (!isFieldWise) {
+                requiredStorages = numChunks;
+            }
+
+            boolean spillPartially = forVariadicFunction && spillsVariadicStructsPartially();
+            boolean furtherAllocationFromTheStack = !hasEnoughRegisters && !spillPartially;
+            if (furtherAllocationFromTheStack) {
+                // Any further allocations for this register type must
+                // be from the stack.
+                nRegs[regType] = MAX_REGISTER_ARGUMENTS;
+            }
+
+            if (requiresSubSlotStackPacking() && !isFieldWise) {
+                // Pad to the next stack slot boundary instead of packing
+                // additional arguments into the unused space.
+                alignStack(STACK_SLOT_SIZE);
+            }
+
+            StructStorage[] structStorages = new StructStorage[requiredStorages];
+            long offset = 0;
+            for (int i = 0; i < structStorages.length; i++) {
+                ValueLayout copyLayout;
+                long copySize;
+                if (isFieldWise) {
+                    // We should only get here for HFAs, which can't have padding
+                    copyLayout = (ValueLayout) scalarLayouts.get(i);
+                    copySize = Utils.byteWidthOfPrimitive(copyLayout.carrier());
+                } else {
+                    // chunk-wise copy
+                    copySize = Math.min(layout.byteSize() - offset, MAX_COPY_SIZE);
+                    boolean useFloat = false; // never use float for chunk-wise copies
+                    copyLayout = SharedUtils.primitiveLayoutForSize(copySize, useFloat);
+                }
+
+                VMStorage storage = nextStorage(regType, copyLayout);
+                Class<?> carrier = copyLayout.carrier();
+                if (isFieldWise && storage.type() == StorageType.STACK) {
+                    // copyLayout is a field of an HFA
+                    // Don't use floats on the stack
+                    carrier = adjustCarrierForStack(carrier);
+                }
+                structStorages[i] = new StructStorage(offset, carrier, (int) copySize, storage);
+                offset += copyLayout.byteSize();
+            }
+
+            if (requiresSubSlotStackPacking() && !isFieldWise) {
+                // Pad to the next stack slot boundary instead of packing
+                // additional arguments into the unused space.
+                alignStack(STACK_SLOT_SIZE);
+            }
+
+            return structStorages;
+        }
+
+        private void alignStack(long alignment) {
+            stackOffset = Utils.alignUp(stackOffset, alignment);
+        }
+
+        // allocate a single ValueLayout, either in a register or on the stack
+        VMStorage nextStorage(int type, ValueLayout layout) {
+            return hasRegister(type) ? regAlloc(type) : stackAlloc(layout);
+        }
+
+        private VMStorage regAlloc(int type) {
+            ABIDescriptor abiDescriptor = abiDescriptor();
+            VMStorage[] source = (forArguments ? abiDescriptor.inputStorage : abiDescriptor.outputStorage)[type];
+            return source[nRegs[type]++];
+        }
+
+        private VMStorage stackAlloc(ValueLayout layout) {
+            assert forArguments : "no stack returns";
+            long stackSlotAlignment = requiresSubSlotStackPacking() && !forVarArgs
+                    ? layout.byteAlignment()
+                    : Math.max(layout.byteAlignment(), STACK_SLOT_SIZE);
+            long alignedStackOffset = Utils.alignUp(stackOffset, stackSlotAlignment);
+
+            short encodedSize = (short) layout.byteSize();
+            assert (encodedSize & 0xFFFF) == layout.byteSize();
+
+            VMStorage storage = AArch64Architecture.stackStorage(encodedSize, (int)alignedStackOffset);
+            stackOffset = alignedStackOffset + layout.byteSize();
+            return storage;
+        }
+
+        void adjustForVarArgs() {
+            // This system passes all variadic parameters on the stack. Ensure
+            // no further arguments are allocated to registers.
+            nRegs[StorageType.INTEGER] = MAX_REGISTER_ARGUMENTS;
+            nRegs[StorageType.VECTOR] = MAX_REGISTER_ARGUMENTS;
+            forVarArgs = true;
+        }
+    }
+
+    abstract class BindingCalculator {
+        protected final StorageCalculator storageCalculator;
+
+        protected BindingCalculator(boolean forArguments, boolean forVariadicFunction) {
+            this.storageCalculator = new StorageCalculator(forArguments, forVariadicFunction);
+        }
+
+        abstract List<Binding> getBindings(Class<?> carrier, MemoryLayout layout);
+
+        abstract List<Binding> getIndirectBindings();
+    }
+
+    class UnboxBindingCalculator extends BindingCalculator {
+        protected final boolean forArguments;
+        protected final boolean forVariadicFunction;
+        private final boolean useAddressPairs;
+
+        UnboxBindingCalculator(boolean forArguments, boolean forVariadicFunction, boolean useAddressPairs) {
+            super(forArguments, forVariadicFunction);
+            this.forArguments = forArguments;
+            this.forVariadicFunction = forVariadicFunction;
+            this.useAddressPairs = useAddressPairs;
+        }
+
+        @Override
+        List<Binding> getIndirectBindings() {
+            return Binding.builder()
+                .unboxAddress()
+                .vmStore(INDIRECT_RESULT, long.class)
+                .build();
+        }
+
+        @Override
+        List<Binding> getBindings(Class<?> carrier, MemoryLayout layout) {
+            TypeClass argumentClass = getArgumentClassForBindings(layout, forVariadicFunction);
+            Binding.Builder bindings = Binding.builder();
+
+            switch (argumentClass) {
+                case STRUCT_REGISTER, STRUCT_HFA -> {
+                    assert carrier == MemorySegment.class;
+                    boolean forHFA = argumentClass == TypeClass.STRUCT_HFA;
+                    StorageCalculator.StructStorage[] structStorages
+                            = storageCalculator.structStorages((GroupLayout) layout, forHFA);
+
+                    for (int i = 0; i < structStorages.length; i++) {
+                        StorageCalculator.StructStorage structStorage = structStorages[i];
+                        if (i < structStorages.length - 1) {
+                            bindings.dup();
+                        }
+                        bindings.bufferLoad(structStorage.offset(), structStorage.carrier(), structStorage.byteWidth())
+                                .vmStore(structStorage.storage(), structStorage.carrier());
+                    }
+                }
+                case STRUCT_REFERENCE -> {
+                    assert carrier == MemorySegment.class;
+                    bindings.copy(layout)
+                            .unboxAddress();
+                    VMStorage storage = storageCalculator.nextStorage(StorageType.INTEGER, SharedUtils.C_POINTER);
+                    bindings.vmStore(storage, long.class);
+                }
+                case POINTER -> {
+                    VMStorage storage = storageCalculator.nextStorage(StorageType.INTEGER, (ValueLayout) layout);
+                    if (useAddressPairs) {
+                        bindings.dup()
+                                .segmentBase()
+                                .vmStore(storage, Object.class)
+                                .segmentOffsetAllowHeap()
+                                .vmStore(null, long.class);
+                    } else {
+                        bindings.unboxAddress();
+                        bindings.vmStore(storage, long.class);
+                    }
+                }
+                case INTEGER -> {
+                    VMStorage storage = storageCalculator.nextStorage(StorageType.INTEGER, (ValueLayout) layout);
+                    bindings.vmStore(storage, carrier);
+                }
+                case FLOAT -> {
+                    boolean forVariadicFunctionArgs = forArguments && forVariadicFunction;
+                    boolean useIntReg = forVariadicFunctionArgs && useIntRegsForVariadicFloatingPointArgs();
+
+                    int type = useIntReg ? StorageType.INTEGER : StorageType.VECTOR;
+                    VMStorage storage = storageCalculator.nextStorage(type, (ValueLayout) layout);
+                    bindings.vmStore(storage, carrier);
+                }
+                default -> throw new UnsupportedOperationException("Unhandled class " + argumentClass);
+            }
+            return bindings.build();
+        }
+    }
+
+    class BoxBindingCalculator extends BindingCalculator {
+        BoxBindingCalculator(boolean forArguments) {
+            super(forArguments, false);
+        }
+
+        @Override
+        List<Binding> getIndirectBindings() {
+            return Binding.builder()
+                .vmLoad(INDIRECT_RESULT, long.class)
+                .boxAddressRaw(Long.MAX_VALUE, 1)
+                .build();
+        }
+
+        @Override
+        List<Binding> getBindings(Class<?> carrier, MemoryLayout layout) {
+            TypeClass argumentClass = TypeClass.classifyLayout(layout);
+            Binding.Builder bindings = Binding.builder();
+            switch (argumentClass) {
+                case STRUCT_REGISTER, STRUCT_HFA -> {
+                    assert carrier == MemorySegment.class;
+                    boolean forHFA = argumentClass == TypeClass.STRUCT_HFA;
+                    bindings.allocate(layout);
+                    StorageCalculator.StructStorage[] structStorages
+                            = storageCalculator.structStorages((GroupLayout) layout, forHFA);
+
+                    for (StorageCalculator.StructStorage structStorage : structStorages) {
+                        bindings.dup();
+                        bindings.vmLoad(structStorage.storage(), structStorage.carrier())
+                                .bufferStore(structStorage.offset(), structStorage.carrier(), structStorage.byteWidth());
+                    }
+                }
+                case STRUCT_REFERENCE -> {
+                    assert carrier == MemorySegment.class;
+                    VMStorage storage = storageCalculator.nextStorage(StorageType.INTEGER, SharedUtils.C_POINTER);
+                    bindings.vmLoad(storage, long.class)
+                            .boxAddress(layout);
+                }
+                case POINTER -> {
+                    AddressLayout addressLayout = (AddressLayout) layout;
+                    VMStorage storage = storageCalculator.nextStorage(StorageType.INTEGER, addressLayout);
+                    bindings.vmLoad(storage, long.class)
+                            .boxAddressRaw(Utils.pointeeByteSize(addressLayout), Utils.pointeeByteAlign(addressLayout));
+                }
+                case INTEGER -> {
+                    VMStorage storage = storageCalculator.nextStorage(StorageType.INTEGER, (ValueLayout) layout);
+                    bindings.vmLoad(storage, carrier);
+                }
+                case FLOAT -> {
+                    VMStorage storage = storageCalculator.nextStorage(StorageType.VECTOR, (ValueLayout) layout);
+                    bindings.vmLoad(storage, carrier);
+                }
+                default -> throw new UnsupportedOperationException("Unhandled class " + argumentClass);
+            }
+            return bindings.build();
+        }
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/foreign/abi/aarch64/TypeClass.class b/tests/test_data/std/jdk/internal/foreign/abi/aarch64/TypeClass.class
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diff --git a/tests/test_data/std/jdk/internal/foreign/abi/aarch64/TypeClass.java b/tests/test_data/std/jdk/internal/foreign/abi/aarch64/TypeClass.java
new file mode 100644
index 00000000..4c655de4
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/foreign/abi/aarch64/TypeClass.java
@@ -0,0 +1,137 @@
+/*
+ * Copyright (c) 2020, 2023, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2020, 2021, Arm Limited. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package jdk.internal.foreign.abi.aarch64;
+
+import java.lang.foreign.GroupLayout;
+import java.lang.foreign.MemoryLayout;
+import java.lang.foreign.MemorySegment;
+import java.lang.foreign.SequenceLayout;
+import java.lang.foreign.ValueLayout;
+import java.util.List;
+import java.util.ArrayList;
+
+public enum TypeClass {
+    STRUCT_REGISTER,
+    STRUCT_REFERENCE,
+    STRUCT_HFA,
+    POINTER,
+    INTEGER,
+    FLOAT;
+
+    private static final int MAX_AGGREGATE_REGS_SIZE = 2;
+
+    private static TypeClass classifyValueType(ValueLayout type) {
+        Class<?> carrier = type.carrier();
+        if (carrier == boolean.class || carrier == byte.class || carrier == char.class ||
+                carrier == short.class || carrier == int.class || carrier == long.class) {
+            return INTEGER;
+        } else if (carrier == float.class || carrier == double.class) {
+            return FLOAT;
+        } else if (carrier == MemorySegment.class) {
+            return POINTER;
+        } else {
+            throw new IllegalStateException("Cannot get here: " + carrier.getName());
+        }
+    }
+
+    static boolean isRegisterAggregate(MemoryLayout type) {
+        return type.byteSize() <= MAX_AGGREGATE_REGS_SIZE * 8;
+    }
+
+    static List<MemoryLayout> scalarLayouts(GroupLayout gl) {
+        List<MemoryLayout> out = new ArrayList<>();
+        scalarLayoutsInternal(out, gl);
+        return out;
+    }
+
+    private static void scalarLayoutsInternal(List<MemoryLayout> out, GroupLayout gl) {
+        for (MemoryLayout member : gl.memberLayouts()) {
+            if (member instanceof GroupLayout memberGl) {
+                scalarLayoutsInternal(out, memberGl);
+            } else if (member instanceof SequenceLayout memberSl) {
+                for (long i = 0; i < memberSl.elementCount(); i++) {
+                    out.add(memberSl.elementLayout());
+                }
+            } else {
+                // padding or value layouts
+                out.add(member);
+            }
+        }
+    }
+
+    static boolean isHomogeneousFloatAggregate(MemoryLayout type) {
+        if (!(type instanceof GroupLayout groupLayout))
+            return false;
+
+        List<MemoryLayout> scalarLayouts = scalarLayouts(groupLayout);
+
+        final int numElements = scalarLayouts.size();
+        if (numElements > 4 || numElements == 0)
+            return false;
+
+        MemoryLayout baseType = scalarLayouts.get(0);
+
+        if (!(baseType instanceof ValueLayout))
+            return false;
+
+        TypeClass baseArgClass = classifyValueType((ValueLayout) baseType);
+        if (baseArgClass != FLOAT)
+           return false;
+
+        for (MemoryLayout elem : scalarLayouts) {
+            if (!(elem instanceof ValueLayout))
+                return false;
+
+            TypeClass argClass = classifyValueType((ValueLayout) elem);
+            if (elem.byteSize() != baseType.byteSize() ||
+                    elem.byteAlignment() != baseType.byteAlignment() ||
+                    baseArgClass != argClass) {
+                return false;
+            }
+        }
+
+        return true;
+    }
+
+    private static TypeClass classifyStructType(MemoryLayout layout) {
+        if (isHomogeneousFloatAggregate(layout)) {
+            return TypeClass.STRUCT_HFA;
+        } else if (isRegisterAggregate(layout)) {
+            return TypeClass.STRUCT_REGISTER;
+        }
+        return TypeClass.STRUCT_REFERENCE;
+    }
+
+    public static TypeClass classifyLayout(MemoryLayout type) {
+        if (type instanceof ValueLayout) {
+            return classifyValueType((ValueLayout) type);
+        } else if (type instanceof GroupLayout) {
+            return classifyStructType(type);
+        } else {
+            throw new IllegalArgumentException("Unsupported layout: " + type);
+        }
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/foreign/abi/aarch64/linux/LinuxAArch64CallArranger.class b/tests/test_data/std/jdk/internal/foreign/abi/aarch64/linux/LinuxAArch64CallArranger.class
new file mode 100644
index 0000000000000000000000000000000000000000..27c5f1540baa4604b999fabaf8a7ce75f281926c
GIT binary patch
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/foreign/abi/aarch64/linux/LinuxAArch64CallArranger.java b/tests/test_data/std/jdk/internal/foreign/abi/aarch64/linux/LinuxAArch64CallArranger.java
new file mode 100644
index 00000000..d79b3337
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/foreign/abi/aarch64/linux/LinuxAArch64CallArranger.java
@@ -0,0 +1,62 @@
+/*
+ * Copyright (c) 2021, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2021, Arm Limited. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package jdk.internal.foreign.abi.aarch64.linux;
+
+import jdk.internal.foreign.abi.aarch64.CallArranger;
+import jdk.internal.foreign.abi.ABIDescriptor;
+
+/**
+ * AArch64 CallArranger specialized for Linux ABI.
+ */
+public class LinuxAArch64CallArranger extends CallArranger {
+
+    @Override
+    protected boolean varArgsOnStack() {
+        // Variadic arguments are passed as normal arguments
+        return false;
+    }
+
+    @Override
+    protected boolean requiresSubSlotStackPacking() {
+        return false;
+    }
+
+    @Override
+    protected ABIDescriptor abiDescriptor() {
+        return C;
+    }
+
+    @Override
+    protected boolean useIntRegsForVariadicFloatingPointArgs() {
+        return false;
+    }
+
+    @Override
+    protected boolean spillsVariadicStructsPartially() {
+        return false;
+    }
+
+}
diff --git a/tests/test_data/std/jdk/internal/foreign/abi/aarch64/linux/LinuxAArch64Linker$1Holder.class b/tests/test_data/std/jdk/internal/foreign/abi/aarch64/linux/LinuxAArch64Linker$1Holder.class
new file mode 100644
index 0000000000000000000000000000000000000000..10472d11829cbf23516b98c8c430a7fd96e2c59b
GIT binary patch
literal 762
zcmbVK$w~u35PhADnK&6u+;=_bK|R=tB8UrwK`{{HK@mK5CT-Gj?17$%_*>#ZQ1Ao%
zD6x9n4&HL9<yG~o>Z*GGczFX5V97%cc^8h40TdW2U2!jXBy^jfH@h-S843qVtMrH=
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/foreign/abi/aarch64/linux/LinuxAArch64Linker.class b/tests/test_data/std/jdk/internal/foreign/abi/aarch64/linux/LinuxAArch64Linker.class
new file mode 100644
index 0000000000000000000000000000000000000000..5d25f66f7bd451126976a7c387b56af2e49cdbf8
GIT binary patch
literal 2439
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/foreign/abi/aarch64/linux/LinuxAArch64Linker.java b/tests/test_data/std/jdk/internal/foreign/abi/aarch64/linux/LinuxAArch64Linker.java
new file mode 100644
index 00000000..4ffd15ae
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/foreign/abi/aarch64/linux/LinuxAArch64Linker.java
@@ -0,0 +1,76 @@
+/*
+ * Copyright (c) 2020, 2024, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2019, 2021, Arm Limited. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package jdk.internal.foreign.abi.aarch64.linux;
+
+import jdk.internal.foreign.abi.AbstractLinker;
+import jdk.internal.foreign.abi.LinkerOptions;
+import jdk.internal.foreign.abi.SharedUtils;
+import jdk.internal.foreign.abi.aarch64.CallArranger;
+
+import java.lang.foreign.FunctionDescriptor;
+import java.lang.foreign.MemoryLayout;
+import java.lang.foreign.ValueLayout;
+import java.lang.invoke.MethodHandle;
+import java.lang.invoke.MethodType;
+import java.nio.ByteOrder;
+import java.util.Map;
+
+/**
+ * ABI implementation based on ARM document "Procedure Call Standard for
+ * the ARM 64-bit Architecture".
+ */
+public final class LinuxAArch64Linker extends AbstractLinker {
+
+    static final Map<String, MemoryLayout> CANONICAL_LAYOUTS =
+            SharedUtils.canonicalLayouts(ValueLayout.JAVA_LONG, ValueLayout.JAVA_LONG, ValueLayout.JAVA_INT);
+
+    public static LinuxAArch64Linker getInstance() {
+        final class Holder {
+            private static final LinuxAArch64Linker INSTANCE = new LinuxAArch64Linker();
+        }
+
+        return Holder.INSTANCE;
+    }
+
+    private LinuxAArch64Linker() {
+        // Ensure there is only one instance
+    }
+
+    @Override
+    protected MethodHandle arrangeDowncall(MethodType inferredMethodType, FunctionDescriptor function, LinkerOptions options) {
+        return CallArranger.LINUX.arrangeDowncall(inferredMethodType, function, options);
+    }
+
+    @Override
+    protected UpcallStubFactory arrangeUpcall(MethodType targetType, FunctionDescriptor function, LinkerOptions options) {
+        return CallArranger.LINUX.arrangeUpcall(targetType, function, options);
+    }
+
+    @Override
+    public Map<String, MemoryLayout> canonicalLayouts() {
+        return CANONICAL_LAYOUTS;
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/foreign/abi/aarch64/macos/MacOsAArch64CallArranger.class b/tests/test_data/std/jdk/internal/foreign/abi/aarch64/macos/MacOsAArch64CallArranger.class
new file mode 100644
index 0000000000000000000000000000000000000000..10d2f25203bcd967bbd2fd018cff4e16cf4eb5f0
GIT binary patch
literal 941
zcma)4&2AGh5dLPfO=w74DF0L-!2!~$bcKX^DFQ7)ktzimv8adM9LH?kx^}U>m3Su(
zzy*l|55PkqoMqdF&_FM?$DZ$JX8hylx9<QtSZX3dt%10O8Po}n_J;e3)LvN4RPxSP
zA#<IuflL^)e0Tjx(qT%a)-s(7OQ=7UTKZ>%T6=kW78fwvK(mF5Xc3<Om+OFW<C0g5
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e@rmk<zg26Ke%Hs4r+#mq1G#Yql5neZcKa8@vcf$8

literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/foreign/abi/aarch64/macos/MacOsAArch64CallArranger.java b/tests/test_data/std/jdk/internal/foreign/abi/aarch64/macos/MacOsAArch64CallArranger.java
new file mode 100644
index 00000000..e099d8cd
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/foreign/abi/aarch64/macos/MacOsAArch64CallArranger.java
@@ -0,0 +1,62 @@
+/*
+ * Copyright (c) 2021, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2021, Arm Limited. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package jdk.internal.foreign.abi.aarch64.macos;
+
+import jdk.internal.foreign.abi.aarch64.CallArranger;
+import jdk.internal.foreign.abi.ABIDescriptor;
+
+/**
+ * AArch64 CallArranger specialized for macOS ABI.
+ */
+public class MacOsAArch64CallArranger extends CallArranger {
+
+    @Override
+    protected boolean varArgsOnStack() {
+        // Variadic arguments are always passed on the stack
+        return true;
+    }
+
+    @Override
+    protected boolean requiresSubSlotStackPacking() {
+        return true;
+    }
+
+    @Override
+    protected ABIDescriptor abiDescriptor() {
+        return C;
+    }
+
+    @Override
+    protected boolean useIntRegsForVariadicFloatingPointArgs() {
+        return false;
+    }
+
+    @Override
+    protected boolean spillsVariadicStructsPartially() {
+        return false;
+    }
+
+}
diff --git a/tests/test_data/std/jdk/internal/foreign/abi/aarch64/macos/MacOsAArch64Linker$1Holder.class b/tests/test_data/std/jdk/internal/foreign/abi/aarch64/macos/MacOsAArch64Linker$1Holder.class
new file mode 100644
index 0000000000000000000000000000000000000000..d203c5a2f1bb31563bc5c0941e8d2c75c7b98842
GIT binary patch
literal 762
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/foreign/abi/aarch64/macos/MacOsAArch64Linker.class b/tests/test_data/std/jdk/internal/foreign/abi/aarch64/macos/MacOsAArch64Linker.class
new file mode 100644
index 0000000000000000000000000000000000000000..3428606052869e619cce718f1e93895f34b219c5
GIT binary patch
literal 2439
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/foreign/abi/aarch64/macos/MacOsAArch64Linker.java b/tests/test_data/std/jdk/internal/foreign/abi/aarch64/macos/MacOsAArch64Linker.java
new file mode 100644
index 00000000..c60f0152
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/foreign/abi/aarch64/macos/MacOsAArch64Linker.java
@@ -0,0 +1,76 @@
+/*
+ * Copyright (c) 2021, 2024, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2021, Arm Limited. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package jdk.internal.foreign.abi.aarch64.macos;
+
+import jdk.internal.foreign.abi.AbstractLinker;
+import jdk.internal.foreign.abi.LinkerOptions;
+import jdk.internal.foreign.abi.SharedUtils;
+import jdk.internal.foreign.abi.aarch64.CallArranger;
+
+import java.lang.foreign.FunctionDescriptor;
+import java.lang.foreign.MemoryLayout;
+import java.lang.foreign.ValueLayout;
+import java.lang.invoke.MethodHandle;
+import java.lang.invoke.MethodType;
+import java.nio.ByteOrder;
+import java.util.Map;
+
+/**
+ * ABI implementation for macOS on Apple Silicon. Based on AAPCS with
+ * changes to va_list and passing arguments on the stack.
+ */
+public final class MacOsAArch64Linker extends AbstractLinker {
+
+    static final Map<String, MemoryLayout> CANONICAL_LAYOUTS =
+            SharedUtils.canonicalLayouts(ValueLayout.JAVA_LONG, ValueLayout.JAVA_LONG, ValueLayout.JAVA_INT);
+
+    public static MacOsAArch64Linker getInstance() {
+        final class Holder {
+            private static final MacOsAArch64Linker INSTANCE = new MacOsAArch64Linker();
+        }
+
+        return Holder.INSTANCE;
+    }
+
+    private MacOsAArch64Linker() {
+        // Ensure there is only one instance
+    }
+
+    @Override
+    protected MethodHandle arrangeDowncall(MethodType inferredMethodType, FunctionDescriptor function, LinkerOptions options) {
+        return CallArranger.MACOS.arrangeDowncall(inferredMethodType, function, options);
+    }
+
+    @Override
+    protected UpcallStubFactory arrangeUpcall(MethodType targetType, FunctionDescriptor function, LinkerOptions options) {
+        return CallArranger.MACOS.arrangeUpcall(targetType, function, options);
+    }
+
+    @Override
+    public Map<String, MemoryLayout> canonicalLayouts() {
+        return CANONICAL_LAYOUTS;
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/foreign/abi/aarch64/windows/WindowsAArch64CallArranger.class b/tests/test_data/std/jdk/internal/foreign/abi/aarch64/windows/WindowsAArch64CallArranger.class
new file mode 100644
index 0000000000000000000000000000000000000000..18fa12d45208e2fc5b85b51ab52ca924aea9edba
GIT binary patch
literal 3409
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/foreign/abi/aarch64/windows/WindowsAArch64CallArranger.java b/tests/test_data/std/jdk/internal/foreign/abi/aarch64/windows/WindowsAArch64CallArranger.java
new file mode 100644
index 00000000..18df7387
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/foreign/abi/aarch64/windows/WindowsAArch64CallArranger.java
@@ -0,0 +1,115 @@
+/*
+ * Copyright (c) 2021, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2021, Arm Limited. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package jdk.internal.foreign.abi.aarch64.windows;
+
+import jdk.internal.foreign.abi.aarch64.CallArranger;
+import jdk.internal.foreign.abi.aarch64.TypeClass;
+import jdk.internal.foreign.abi.ABIDescriptor;
+import jdk.internal.foreign.abi.VMStorage;
+
+import java.lang.foreign.MemoryLayout;
+
+import static jdk.internal.foreign.abi.aarch64.AArch64Architecture.*;
+import static jdk.internal.foreign.abi.aarch64.AArch64Architecture.Regs.*;
+
+/**
+ * AArch64 CallArranger specialized for Windows ABI.
+ */
+public class WindowsAArch64CallArranger extends CallArranger {
+
+    private static final VMStorage INDIRECT_RESULT = r8;
+
+    // This is derived from the AAPCS64 spec, restricted to what's
+    // possible when calling to/from C code.
+    //
+    // The indirect result register, r8, is used to return a large
+    // struct by value. It's treated as an input here as the caller is
+    // responsible for allocating storage and passing this into the
+    // function.
+    //
+    // Although the AAPCS64 says r0-7 and v0-7 are all valid return
+    // registers, it's not possible to generate a C function that uses
+    // r2-7 and v4-7 so, they are omitted here.
+    private static final ABIDescriptor WindowsAArch64AbiDescriptor = abiFor(
+        new VMStorage[] { r0, r1, r2, r3, r4, r5, r6, r7, INDIRECT_RESULT},
+        new VMStorage[] { v0, v1, v2, v3, v4, v5, v6, v7 },
+        new VMStorage[] { r0, r1 },
+        new VMStorage[] { v0, v1, v2, v3 },
+        new VMStorage[] { r9, r10, r11, r12, r13, r14, r15, r16, r17 },
+        new VMStorage[] { v16, v17, v18, v19, v20, v21, v22, v23, v24, v25,
+                          v26, v27, v28, v29, v30, v31 },
+        16,  // Stack is always 16 byte aligned on AArch64
+        0,   // No shadow space
+        r9,  // target addr reg
+        r10  // return buffer addr reg
+    );
+
+    @Override
+    protected ABIDescriptor abiDescriptor() {
+        return WindowsAArch64AbiDescriptor;
+    }
+
+    @Override
+    protected boolean varArgsOnStack() {
+        return false;
+    }
+
+    @Override
+    protected boolean requiresSubSlotStackPacking() {
+        return false;
+    }
+
+    @Override
+    protected boolean useIntRegsForVariadicFloatingPointArgs() {
+        // The Windows ABI requires floating point arguments to be passed in
+        // general purpose registers when calling variadic functions.
+        return true;
+    }
+
+    @Override
+    protected boolean spillsVariadicStructsPartially() {
+        return true;
+    }
+
+    @Override
+    protected TypeClass getArgumentClassForBindings(MemoryLayout layout, boolean forVariadicFunction) {
+        TypeClass argumentClass = TypeClass.classifyLayout(layout);
+
+        // HFA struct arguments are classified as STRUCT_REGISTER when
+        // general purpose registers are being used to pass floating point
+        // arguments. If the HFA is too big to pass entirely in general
+        // purpose registers, it is classified as an ordinary struct
+        // (i.e. as a STRUCT_REFERENCE).
+        if (argumentClass == TypeClass.STRUCT_HFA && forVariadicFunction) {
+            // The Windows ABI requires the members of the variadic HFA to be
+            // passed in general purpose registers but only a STRUCT_HFA that
+            // is at most 16 bytes can be passed in general purpose registers.
+            argumentClass = layout.byteSize() <= 16 ? TypeClass.STRUCT_REGISTER : TypeClass.STRUCT_REFERENCE;
+        }
+
+        return argumentClass;
+    }
+}
\ No newline at end of file
diff --git a/tests/test_data/std/jdk/internal/foreign/abi/aarch64/windows/WindowsAArch64Linker$1Holder.class b/tests/test_data/std/jdk/internal/foreign/abi/aarch64/windows/WindowsAArch64Linker$1Holder.class
new file mode 100644
index 0000000000000000000000000000000000000000..acb899da5f1dbf1021a5b93d04e16f45ae406a61
GIT binary patch
literal 784
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k8D1*E@F%eY2b08QFokJChsJIO^Bu;;0-;Cu3xtcn7va;#V*mgE

literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/foreign/abi/aarch64/windows/WindowsAArch64Linker.class b/tests/test_data/std/jdk/internal/foreign/abi/aarch64/windows/WindowsAArch64Linker.class
new file mode 100644
index 0000000000000000000000000000000000000000..0596b5ea54f3891ae6fc2a4e280ec03782a4322b
GIT binary patch
literal 2577
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Aj{pDw

literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/foreign/abi/aarch64/windows/WindowsAArch64Linker.java b/tests/test_data/std/jdk/internal/foreign/abi/aarch64/windows/WindowsAArch64Linker.java
new file mode 100644
index 00000000..23fb046a
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/foreign/abi/aarch64/windows/WindowsAArch64Linker.java
@@ -0,0 +1,72 @@
+/*
+ * Copyright (c) 2021, 2024, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2021, Arm Limited. All rights reserved.
+ * Copyright (c) 2021, 2022, Microsoft. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package jdk.internal.foreign.abi.aarch64.windows;
+
+import jdk.internal.foreign.abi.AbstractLinker;
+import jdk.internal.foreign.abi.LinkerOptions;
+import jdk.internal.foreign.abi.SharedUtils;
+import jdk.internal.foreign.abi.aarch64.CallArranger;
+
+import java.lang.foreign.FunctionDescriptor;
+import java.lang.foreign.MemoryLayout;
+import java.lang.foreign.ValueLayout;
+import java.lang.invoke.MethodHandle;
+import java.lang.invoke.MethodType;
+import java.nio.ByteOrder;
+import java.util.Map;
+
+/**
+ * ABI implementation for Windows/AArch64. Based on AAPCS with
+ * changes to va_list.
+ */
+public final class WindowsAArch64Linker extends AbstractLinker {
+
+    static final Map<String, MemoryLayout> CANONICAL_LAYOUTS =
+            SharedUtils.canonicalLayouts(ValueLayout.JAVA_INT, ValueLayout.JAVA_LONG, ValueLayout.JAVA_CHAR);
+
+    public static WindowsAArch64Linker getInstance() {
+        class Holder {
+            private static final WindowsAArch64Linker INSTANCE =  new WindowsAArch64Linker();
+        }
+        return Holder.INSTANCE;
+    }
+
+    @Override
+    protected MethodHandle arrangeDowncall(MethodType inferredMethodType, FunctionDescriptor function, LinkerOptions options) {
+        return CallArranger.WINDOWS.arrangeDowncall(inferredMethodType, function, options);
+    }
+
+    @Override
+    protected UpcallStubFactory arrangeUpcall(MethodType targetType, FunctionDescriptor function, LinkerOptions options) {
+        return CallArranger.WINDOWS.arrangeUpcall(targetType, function, options);
+    }
+
+    @Override
+    public Map<String, MemoryLayout> canonicalLayouts() {
+        return CANONICAL_LAYOUTS;
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/foreign/abi/fallback/FFIABI.class b/tests/test_data/std/jdk/internal/foreign/abi/fallback/FFIABI.class
new file mode 100644
index 0000000000000000000000000000000000000000..03d74fd09c02aba4ad632b513cd3fdbe51146b7c
GIT binary patch
literal 1353
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/foreign/abi/fallback/FFIABI.java b/tests/test_data/std/jdk/internal/foreign/abi/fallback/FFIABI.java
new file mode 100644
index 00000000..89062f5c
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/foreign/abi/fallback/FFIABI.java
@@ -0,0 +1,42 @@
+/*
+ * Copyright (c) 2023, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package jdk.internal.foreign.abi.fallback;
+
+/**
+ * enum which maps the {@code ffi_abi} enum
+ */
+enum FFIABI {
+    DEFAULT(LibFallback.defaultABI());
+
+    private final int value;
+
+    FFIABI(int abi) {
+        this.value = abi;
+    }
+
+    int value() {
+        return value;
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/foreign/abi/fallback/FFIStatus.class b/tests/test_data/std/jdk/internal/foreign/abi/fallback/FFIStatus.class
new file mode 100644
index 0000000000000000000000000000000000000000..2ae18233c20d1e5df2052eb500fd574a5949d745
GIT binary patch
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zF8m#2yO27V=|b*cx{KisCQosvc8X-}1ovVy$C!&BBYTW5PVnGQ9;{ykI|+%_b4Xww
zcj+n5A%pwK;vp8Hl5~CvRcv9KbibuBgis<#-**yNROT<QM|zn^^KU}>9jxXjYHBS&
z)YMv#sHwFOQB%41i>V3Y1=2kTy$6vyC4|@`{|Rz$;1|M5KnRi$z77gO7Q$*s2*Ypj
l_zj{w17{A#sG2~54dWiwSBm~=EYa2ZdRMNZO6NZ8d<06;ou2>z

literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/foreign/abi/fallback/FFIStatus.java b/tests/test_data/std/jdk/internal/foreign/abi/fallback/FFIStatus.java
new file mode 100644
index 00000000..5ac6a95e
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/foreign/abi/fallback/FFIStatus.java
@@ -0,0 +1,52 @@
+/*
+ * Copyright (c) 2023, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package jdk.internal.foreign.abi.fallback;
+
+/**
+ * See doc: <a href="https://github.com/libffi/libffi/blob/7611bb4cfe90884b55ad225e0166136a1d2cf22b/doc/libffi.texi#L159"></a>
+ * <p>
+ * typedef enum {
+ *   FFI_OK = 0,
+ *   FFI_BAD_TYPEDEF,
+ *   FFI_BAD_ABI,
+ *   FFI_BAD_ARGTYPE
+ * } ffi_status;
+ */
+enum FFIStatus {
+    FFI_OK,
+    FFI_BAD_TYPEDEF,
+    FFI_BAD_ABI,
+    FFI_BAD_ARGTYPE;
+
+    static FFIStatus of(int code) {
+        return switch (code) {
+            case 0 -> FFI_OK;
+            case 1 -> FFI_BAD_TYPEDEF;
+            case 2 -> FFI_BAD_ABI;
+            case 3 -> FFI_BAD_ARGTYPE;
+            default -> throw new IllegalArgumentException("Unknown status code: " + code);
+        };
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/foreign/abi/fallback/FFIType.class b/tests/test_data/std/jdk/internal/foreign/abi/fallback/FFIType.class
new file mode 100644
index 0000000000000000000000000000000000000000..82e5a6a76c4f4723d05d6b3d15f8136c160187f7
GIT binary patch
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/foreign/abi/fallback/FFIType.java b/tests/test_data/std/jdk/internal/foreign/abi/fallback/FFIType.java
new file mode 100644
index 00000000..c8fa7297
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/foreign/abi/fallback/FFIType.java
@@ -0,0 +1,162 @@
+/*
+ * Copyright (c) 2023, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package jdk.internal.foreign.abi.fallback;
+
+import jdk.internal.foreign.Utils;
+
+import java.lang.foreign.Arena;
+import java.lang.foreign.GroupLayout;
+import java.lang.foreign.MemoryLayout;
+import java.lang.foreign.MemorySegment;
+import java.lang.foreign.PaddingLayout;
+import java.lang.foreign.SequenceLayout;
+import java.lang.foreign.StructLayout;
+import java.lang.foreign.UnionLayout;
+import java.lang.foreign.ValueLayout;
+import java.lang.invoke.VarHandle;
+import java.util.Collections;
+import java.util.List;
+import java.util.Map;
+import java.util.Objects;
+import java.util.function.Predicate;
+
+import static java.lang.foreign.ValueLayout.ADDRESS;
+import static java.lang.foreign.ValueLayout.JAVA_BYTE;
+import static java.lang.foreign.ValueLayout.JAVA_INT;
+import static java.lang.foreign.ValueLayout.JAVA_LONG;
+import static java.lang.foreign.ValueLayout.JAVA_SHORT;
+
+/**
+ * typedef struct _ffi_type
+ * {
+ *   size_t size;
+ *   unsigned short alignment;
+ *   unsigned short type;
+ *   struct _ffi_type **elements;
+ * } ffi_type;
+ */
+class FFIType {
+
+    static final ValueLayout SIZE_T = layoutFor((int)ADDRESS.byteSize());
+    private static final ValueLayout UNSIGNED_SHORT = JAVA_SHORT;
+    private static final StructLayout LAYOUT = Utils.computePaddedStructLayout(
+            SIZE_T, UNSIGNED_SHORT, UNSIGNED_SHORT.withName("type"), ADDRESS.withName("elements"));
+
+    private static final VarHandle VH_TYPE = LAYOUT.varHandle(MemoryLayout.PathElement.groupElement("type"));
+    private static final VarHandle VH_ELEMENTS = LAYOUT.varHandle(MemoryLayout.PathElement.groupElement("elements"));
+    private static final VarHandle VH_SIZE_T = SIZE_T.varHandle();
+
+    private static MemorySegment make(List<MemoryLayout> elements, FFIABI abi, Arena scope) {
+        MemorySegment elementsSeg = scope.allocate((elements.size() + 1) * ADDRESS.byteSize());
+        int i = 0;
+        for (; i < elements.size(); i++) {
+            MemoryLayout elementLayout = elements.get(i);
+            MemorySegment elementType = toFFIType(elementLayout, abi, scope);
+            elementsSeg.setAtIndex(ADDRESS, i, elementType);
+        }
+        // elements array is null-terminated
+        elementsSeg.setAtIndex(ADDRESS, i, MemorySegment.NULL);
+
+        MemorySegment ffiType = scope.allocate(LAYOUT);
+        VH_TYPE.set(ffiType, 0L, LibFallback.structTag());
+        VH_ELEMENTS.set(ffiType, 0L, elementsSeg);
+
+        return ffiType;
+    }
+
+    private static final Map<Class<?>, MemorySegment> CARRIER_TO_TYPE = Map.of(
+        boolean.class, LibFallback.uint8Type(),
+        byte.class, LibFallback.sint8Type(),
+        short.class, LibFallback.sint16Type(),
+        char.class, LibFallback.uint16Type(),
+        int.class, LibFallback.sint32Type(),
+        long.class, LibFallback.sint64Type(),
+        float.class, LibFallback.floatType(),
+        double.class, LibFallback.doubleType(),
+        MemorySegment.class, LibFallback.pointerType()
+    );
+
+    static MemorySegment toFFIType(MemoryLayout layout, FFIABI abi, Arena scope) {
+        if (layout instanceof GroupLayout grpl) {
+            if (grpl instanceof StructLayout strl) {
+                // libffi doesn't want our padding
+                List<MemoryLayout> filteredLayouts = strl.memberLayouts().stream()
+                        .filter(Predicate.not(PaddingLayout.class::isInstance))
+                        .toList();
+                MemorySegment structType = make(filteredLayouts, abi, scope);
+                verifyStructType(strl, filteredLayouts, structType, abi);
+                return structType;
+            }
+            assert grpl instanceof UnionLayout;
+            // JDK-8301800
+            throw new IllegalArgumentException("Fallback linker does not support by-value unions: " + grpl);
+        } else if (layout instanceof SequenceLayout sl) {
+            List<MemoryLayout> elements = Collections.nCopies(Math.toIntExact(sl.elementCount()), sl.elementLayout());
+            return make(elements, abi, scope);
+        }
+        return Objects.requireNonNull(CARRIER_TO_TYPE.get(((ValueLayout) layout).carrier()));
+    }
+
+    // verify layout against what libffi sets
+    private static void verifyStructType(StructLayout structLayout, List<MemoryLayout> filteredLayouts, MemorySegment structType,
+                                         FFIABI abi) {
+        try (Arena verifyArena = Arena.ofConfined()) {
+            MemorySegment offsetsOut = verifyArena.allocate(SIZE_T.byteSize() * filteredLayouts.size());
+            LibFallback.getStructOffsets(structType, offsetsOut, abi);
+            long expectedOffset = 0;
+            int offsetIdx = 0;
+            for (MemoryLayout element : structLayout.memberLayouts()) {
+                if (!(element instanceof PaddingLayout)) {
+                    long ffiOffset = sizeTAtIndex(offsetsOut, offsetIdx++);
+                    if (ffiOffset != expectedOffset) {
+                        throw new IllegalArgumentException("Invalid group layout." +
+                                " Offset of '" + element.name().orElse("<unnamed>")
+                                + "': " + expectedOffset + " != " + ffiOffset);
+                    }
+                }
+                expectedOffset += element.byteSize();
+            }
+        }
+    }
+
+    static ValueLayout layoutFor(int byteSize) {
+        return switch (byteSize) {
+            case 1 -> JAVA_BYTE;
+            case 2 -> JAVA_SHORT;
+            case 4 -> JAVA_INT;
+            case 8 -> JAVA_LONG;
+            default -> throw new IllegalStateException("Unsupported size: " + byteSize);
+        };
+    }
+
+    private static long sizeTAtIndex(MemorySegment segment, int index) {
+        long offset = SIZE_T.scale(0, index);
+        if (VH_SIZE_T.varType() == long.class) {
+            return (long) VH_SIZE_T.get(segment, offset);
+        } else {
+            return (int) VH_SIZE_T.get(segment, offset); // 'erase' to long
+        }
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/foreign/abi/fallback/FallbackLinker$1Holder.class b/tests/test_data/std/jdk/internal/foreign/abi/fallback/FallbackLinker$1Holder.class
new file mode 100644
index 0000000000000000000000000000000000000000..9e4f049705bc098631dabe698f56cd26bedded6c
GIT binary patch
literal 713
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/foreign/abi/fallback/FallbackLinker$2Holder.class b/tests/test_data/std/jdk/internal/foreign/abi/fallback/FallbackLinker$2Holder.class
new file mode 100644
index 0000000000000000000000000000000000000000..bba3563e5994ef6316012a336c9bea401a48e2fd
GIT binary patch
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/foreign/abi/fallback/FallbackLinker$DowncallData.class b/tests/test_data/std/jdk/internal/foreign/abi/fallback/FallbackLinker$DowncallData.class
new file mode 100644
index 0000000000000000000000000000000000000000..f2e18ac9caaeb7e2d5226693823d2490c6d8e35e
GIT binary patch
literal 2778
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HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/foreign/abi/fallback/FallbackLinker$UpcallData.class b/tests/test_data/std/jdk/internal/foreign/abi/fallback/FallbackLinker$UpcallData.class
new file mode 100644
index 0000000000000000000000000000000000000000..306de5d1f8ed42f3d2e8861ed28ea4dcc78bd80e
GIT binary patch
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/foreign/abi/fallback/FallbackLinker.class b/tests/test_data/std/jdk/internal/foreign/abi/fallback/FallbackLinker.class
new file mode 100644
index 0000000000000000000000000000000000000000..9cec6f1ac02864f178d3d95d6c27214b811cc194
GIT binary patch
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diff --git a/tests/test_data/std/jdk/internal/foreign/abi/fallback/FallbackLinker.java b/tests/test_data/std/jdk/internal/foreign/abi/fallback/FallbackLinker.java
new file mode 100644
index 00000000..59d3810e
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/foreign/abi/fallback/FallbackLinker.java
@@ -0,0 +1,329 @@
+/*
+ * Copyright (c) 2023, 2024, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package jdk.internal.foreign.abi.fallback;
+
+import java.lang.foreign.AddressLayout;
+import java.lang.foreign.Arena;
+import java.lang.foreign.FunctionDescriptor;
+import java.lang.foreign.GroupLayout;
+import java.lang.foreign.MemoryLayout;
+import java.lang.foreign.MemorySegment;
+import java.lang.foreign.SegmentAllocator;
+import java.lang.foreign.ValueLayout;
+import static java.lang.foreign.ValueLayout.ADDRESS;
+import static java.lang.foreign.ValueLayout.JAVA_BOOLEAN;
+import static java.lang.foreign.ValueLayout.JAVA_BYTE;
+import static java.lang.foreign.ValueLayout.JAVA_CHAR;
+import static java.lang.foreign.ValueLayout.JAVA_DOUBLE;
+import static java.lang.foreign.ValueLayout.JAVA_FLOAT;
+import static java.lang.foreign.ValueLayout.JAVA_INT;
+import static java.lang.foreign.ValueLayout.JAVA_LONG;
+import static java.lang.foreign.ValueLayout.JAVA_SHORT;
+import java.lang.invoke.MethodHandle;
+import java.lang.invoke.MethodHandles;
+import static java.lang.invoke.MethodHandles.foldArguments;
+import java.lang.invoke.MethodType;
+import java.lang.ref.Reference;
+import java.nio.ByteOrder;
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Map;
+import jdk.internal.foreign.AbstractMemorySegmentImpl;
+import jdk.internal.foreign.MemorySessionImpl;
+import jdk.internal.foreign.abi.AbstractLinker;
+import jdk.internal.foreign.abi.CapturableState;
+import jdk.internal.foreign.abi.LinkerOptions;
+import jdk.internal.foreign.abi.SharedUtils;
+
+public final class FallbackLinker extends AbstractLinker {
+
+    private static final MethodHandle MH_DO_DOWNCALL;
+    private static final MethodHandle MH_DO_UPCALL;
+
+    static {
+        try {
+            MH_DO_DOWNCALL = MethodHandles.lookup().findStatic(FallbackLinker.class, "doDowncall",
+                    MethodType.methodType(Object.class, SegmentAllocator.class, Object[].class, FallbackLinker.DowncallData.class));
+            MH_DO_UPCALL = MethodHandles.lookup().findStatic(FallbackLinker.class, "doUpcall",
+                    MethodType.methodType(void.class, MethodHandle.class, MemorySegment.class, MemorySegment.class, UpcallData.class));
+        } catch (ReflectiveOperationException e) {
+            throw new ExceptionInInitializerError(e);
+        }
+    }
+
+    public static FallbackLinker getInstance() {
+        class Holder {
+            static final FallbackLinker INSTANCE = new FallbackLinker();
+        }
+        return Holder.INSTANCE;
+    }
+
+    public static boolean isSupported() {
+        return LibFallback.SUPPORTED;
+    }
+
+    @Override
+    protected MethodHandle arrangeDowncall(MethodType inferredMethodType, FunctionDescriptor function, LinkerOptions options) {
+        MemorySegment cif = makeCif(inferredMethodType, function, options, Arena.ofAuto());
+
+        int capturedStateMask = options.capturedCallState()
+                .mapToInt(CapturableState::mask)
+                .reduce(0, (a, b) -> a | b);
+        DowncallData invData = new DowncallData(cif, function.returnLayout().orElse(null),
+                function.argumentLayouts(), capturedStateMask, options.allowsHeapAccess());
+
+        MethodHandle target = MethodHandles.insertArguments(MH_DO_DOWNCALL, 2, invData);
+
+        int leadingArguments = 1; // address
+        MethodType type = inferredMethodType.insertParameterTypes(0, SegmentAllocator.class, MemorySegment.class);
+        if (capturedStateMask != 0) {
+            leadingArguments++;
+            type = type.insertParameterTypes(2, MemorySegment.class);
+        }
+        target = target.asCollector(1, Object[].class, inferredMethodType.parameterCount() + leadingArguments);
+        target = target.asType(type);
+        target = foldArguments(target, 1, SharedUtils.MH_CHECK_SYMBOL);
+        target = SharedUtils.swapArguments(target, 0, 1); // normalize parameter order
+
+        return target;
+    }
+
+    @Override
+    protected UpcallStubFactory arrangeUpcall(MethodType targetType, FunctionDescriptor function, LinkerOptions options) {
+        MemorySegment cif = makeCif(targetType, function, options, Arena.ofAuto());
+
+        UpcallData invData = new UpcallData(function.returnLayout().orElse(null), function.argumentLayouts(), cif);
+        MethodHandle doUpcallMH = MethodHandles.insertArguments(MH_DO_UPCALL, 3, invData);
+
+        return (target, scope) -> {
+            target = MethodHandles.insertArguments(doUpcallMH, 0, target);
+            return LibFallback.createClosure(cif, target, scope);
+        };
+    }
+
+    private static MemorySegment makeCif(MethodType methodType, FunctionDescriptor function, LinkerOptions options, Arena scope) {
+        FFIABI abi = FFIABI.DEFAULT;
+
+        MemorySegment argTypes = scope.allocate(function.argumentLayouts().size() * ADDRESS.byteSize());
+        List<MemoryLayout> argLayouts = function.argumentLayouts();
+        for (int i = 0; i < argLayouts.size(); i++) {
+            MemoryLayout layout = argLayouts.get(i);
+            argTypes.setAtIndex(ADDRESS, i, FFIType.toFFIType(layout, abi, scope));
+        }
+
+        MemorySegment returnType = methodType.returnType() != void.class
+                ? FFIType.toFFIType(function.returnLayout().orElseThrow(), abi, scope)
+                : LibFallback.voidType();
+
+        if (options.isVariadicFunction()) {
+            int numFixedArgs = options.firstVariadicArgIndex();
+            int numTotalArgs = argLayouts.size();
+            return LibFallback.prepCifVar(returnType, numFixedArgs, numTotalArgs, argTypes, abi, scope);
+        } else {
+            return LibFallback.prepCif(returnType, argLayouts.size(), argTypes, abi, scope);
+        }
+    }
+
+    private record DowncallData(MemorySegment cif, MemoryLayout returnLayout, List<MemoryLayout> argLayouts,
+                                int capturedStateMask, boolean allowsHeapAccess) {}
+
+    private static Object doDowncall(SegmentAllocator returnAllocator, Object[] args, DowncallData invData) {
+        List<MemorySessionImpl> acquiredSessions = new ArrayList<>();
+        try (Arena arena = Arena.ofConfined()) {
+            int argStart = 0;
+            Object[] heapBases = invData.allowsHeapAccess() ? new Object[args.length] : null;
+
+            MemorySegment target = (MemorySegment) args[argStart++];
+            MemorySessionImpl targetImpl = ((AbstractMemorySegmentImpl) target).sessionImpl();
+            targetImpl.acquire0();
+            acquiredSessions.add(targetImpl);
+
+            MemorySegment capturedState = null;
+            if (invData.capturedStateMask() != 0) {
+                capturedState = SharedUtils.checkCaptureSegment((MemorySegment) args[argStart++]);
+                MemorySessionImpl capturedStateImpl = ((AbstractMemorySegmentImpl) capturedState).sessionImpl();
+                capturedStateImpl.acquire0();
+                acquiredSessions.add(capturedStateImpl);
+            }
+
+            List<MemoryLayout> argLayouts = invData.argLayouts();
+            MemorySegment argPtrs = arena.allocate(argLayouts.size() * ADDRESS.byteSize());
+            for (int i = 0; i < argLayouts.size(); i++) {
+                Object arg = args[argStart + i];
+                MemoryLayout layout = argLayouts.get(i);
+
+                if (layout instanceof AddressLayout) {
+                    AbstractMemorySegmentImpl ms = (AbstractMemorySegmentImpl) arg;
+                    MemorySessionImpl sessionImpl = ms.sessionImpl();
+                    sessionImpl.acquire0();
+                    acquiredSessions.add(sessionImpl);
+                    if (invData.allowsHeapAccess() && !ms.isNative()) {
+                        heapBases[i] = ms.unsafeGetBase();
+                        // write the offset to the arg segment, add array ptr to it in native code
+                        layout = JAVA_LONG;
+                        arg = ms.address();
+                    }
+                }
+
+                MemorySegment argSeg = arena.allocate(layout);
+                writeValue(arg, layout, argSeg);
+                argPtrs.setAtIndex(ADDRESS, i, argSeg);
+            }
+
+            MemorySegment retSeg = null;
+            if (invData.returnLayout() != null) {
+                retSeg = (invData.returnLayout() instanceof GroupLayout ? returnAllocator : arena).allocate(invData.returnLayout);
+            }
+
+            LibFallback.doDowncall(invData.cif, target, retSeg, argPtrs, capturedState, invData.capturedStateMask(),
+                                   heapBases, args.length);
+
+            Reference.reachabilityFence(invData.cif());
+
+            return readValue(retSeg, invData.returnLayout());
+        } finally {
+            for (MemorySessionImpl session : acquiredSessions) {
+                session.release0();
+            }
+        }
+    }
+
+    // note that cif is not used, but we store it here to keep it alive
+    private record UpcallData(MemoryLayout returnLayout, List<MemoryLayout> argLayouts, MemorySegment cif) {}
+
+    @SuppressWarnings("restricted")
+    private static void doUpcall(MethodHandle target, MemorySegment retPtr, MemorySegment argPtrs, UpcallData data) throws Throwable {
+        List<MemoryLayout> argLayouts = data.argLayouts();
+        int numArgs = argLayouts.size();
+        MemoryLayout retLayout = data.returnLayout();
+        try (Arena upcallArena = Arena.ofConfined()) {
+            MemorySegment argsSeg = argPtrs.reinterpret(numArgs * ADDRESS.byteSize(), upcallArena, null);
+            MemorySegment retSeg = retLayout != null
+                ? retPtr.reinterpret(retLayout.byteSize(), upcallArena, null) // restricted
+                : null;
+
+            Object[] args = new Object[numArgs];
+            for (int i = 0; i < numArgs; i++) {
+                MemoryLayout argLayout = argLayouts.get(i);
+                MemorySegment argPtr = argsSeg.getAtIndex(ADDRESS, i)
+                        .reinterpret(argLayout.byteSize(), upcallArena, null); // restricted
+                args[i] = readValue(argPtr, argLayout);
+            }
+
+            Object result = target.invokeWithArguments(args);
+
+            writeValue(result, data.returnLayout(), retSeg);
+        }
+    }
+
+    // where
+    private static void writeValue(Object arg, MemoryLayout layout, MemorySegment argSeg) {
+        switch (layout) {
+            case ValueLayout.OfBoolean bl -> argSeg.set(bl, 0, (Boolean) arg);
+            case ValueLayout.OfByte    bl -> argSeg.set(bl, 0, (Byte) arg);
+            case ValueLayout.OfShort   sl -> argSeg.set(sl, 0, (Short) arg);
+            case ValueLayout.OfChar    cl -> argSeg.set(cl, 0, (Character) arg);
+            case ValueLayout.OfInt     il -> argSeg.set(il, 0, (Integer) arg);
+            case ValueLayout.OfLong    ll -> argSeg.set(ll, 0, (Long) arg);
+            case ValueLayout.OfFloat   fl -> argSeg.set(fl, 0, (Float) arg);
+            case ValueLayout.OfDouble  dl -> argSeg.set(dl, 0, (Double) arg);
+            case AddressLayout         al -> argSeg.set(al, 0, (MemorySegment) arg);
+            case GroupLayout            _ ->
+                    MemorySegment.copy((MemorySegment) arg, 0, argSeg, 0, argSeg.byteSize()); // by-value struct
+            case null, default -> {
+                assert layout == null;
+            }
+        }
+    }
+
+    private static Object readValue(MemorySegment seg, MemoryLayout layout) {
+        if (layout instanceof ValueLayout.OfBoolean bl) {
+            return seg.get(bl, 0);
+        } else if (layout instanceof ValueLayout.OfByte bl) {
+            return seg.get(bl, 0);
+        } else if (layout instanceof ValueLayout.OfShort sl) {
+            return seg.get(sl, 0);
+        } else if (layout instanceof ValueLayout.OfChar cl) {
+            return seg.get(cl, 0);
+        } else if (layout instanceof ValueLayout.OfInt il) {
+            return seg.get(il, 0);
+        } else if (layout instanceof ValueLayout.OfLong ll) {
+            return seg.get(ll, 0);
+        } else if (layout instanceof ValueLayout.OfFloat fl) {
+            return seg.get(fl, 0);
+        } else if (layout instanceof ValueLayout.OfDouble dl) {
+            return seg.get(dl, 0);
+        } else if (layout instanceof AddressLayout al) {
+            return seg.get(al, 0);
+        } else if (layout instanceof GroupLayout) {
+            return seg;
+        }
+        assert layout == null;
+        return null;
+    }
+
+    @Override
+    public Map<String, MemoryLayout> canonicalLayouts() {
+        // Avoid eager dependency on LibFallback, so we can safely check LibFallback.SUPPORTED
+        class Holder {
+            static final Map<String, MemoryLayout> CANONICAL_LAYOUTS;
+
+            static {
+                int wchar_size = LibFallback.wcharSize();
+                MemoryLayout wchartLayout = switch(wchar_size) {
+                    case 2 -> JAVA_CHAR; // prefer JAVA_CHAR
+                    default -> FFIType.layoutFor(wchar_size);
+                };
+
+                CANONICAL_LAYOUTS = Map.ofEntries(
+                    // specified canonical layouts
+                    Map.entry("bool", JAVA_BOOLEAN),
+                    Map.entry("char", JAVA_BYTE),
+                    Map.entry("float", JAVA_FLOAT),
+                    Map.entry("long long", JAVA_LONG.withByteAlignment(LibFallback.longLongAlign())),
+                    Map.entry("double", JAVA_DOUBLE.withByteAlignment(LibFallback.doubleAlign())),
+                    Map.entry("void*", ADDRESS),
+                    // platform-dependent sizes
+                    Map.entry("size_t", FFIType.SIZE_T),
+                    Map.entry("short", FFIType.layoutFor(LibFallback.shortSize())),
+                    Map.entry("int", FFIType.layoutFor(LibFallback.intSize())),
+                    Map.entry("long", FFIType.layoutFor(LibFallback.longSize())),
+                    Map.entry("wchar_t", wchartLayout),
+                    // JNI types
+                    Map.entry("jboolean", JAVA_BOOLEAN),
+                    Map.entry("jchar", JAVA_CHAR),
+                    Map.entry("jbyte", JAVA_BYTE),
+                    Map.entry("jshort", JAVA_SHORT),
+                    Map.entry("jint", JAVA_INT),
+                    Map.entry("jlong", JAVA_LONG),
+                    Map.entry("jfloat", JAVA_FLOAT),
+                    Map.entry("jdouble", JAVA_DOUBLE)
+                );
+            }
+        }
+
+        return Holder.CANONICAL_LAYOUTS;
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/foreign/abi/fallback/LibFallback$1.class b/tests/test_data/std/jdk/internal/foreign/abi/fallback/LibFallback$1.class
new file mode 100644
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diff --git a/tests/test_data/std/jdk/internal/foreign/abi/fallback/LibFallback$NativeConstants.class b/tests/test_data/std/jdk/internal/foreign/abi/fallback/LibFallback$NativeConstants.class
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diff --git a/tests/test_data/std/jdk/internal/foreign/abi/fallback/LibFallback.class b/tests/test_data/std/jdk/internal/foreign/abi/fallback/LibFallback.class
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HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/foreign/abi/fallback/LibFallback.java b/tests/test_data/std/jdk/internal/foreign/abi/fallback/LibFallback.java
new file mode 100644
index 00000000..58d6baf8
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/foreign/abi/fallback/LibFallback.java
@@ -0,0 +1,278 @@
+/*
+ * Copyright (c) 2023, 2024, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package jdk.internal.foreign.abi.fallback;
+
+import jdk.internal.foreign.abi.SharedUtils;
+
+import java.lang.foreign.Arena;
+import java.lang.foreign.MemorySegment;
+import java.lang.invoke.MethodHandle;
+import java.lang.invoke.MethodType;
+
+final class LibFallback {
+    private LibFallback() {}
+
+    static final boolean SUPPORTED = tryLoadLibrary();
+
+    @SuppressWarnings("removal")
+    private static boolean tryLoadLibrary() {
+        return java.security.AccessController.doPrivileged(
+                new java.security.PrivilegedAction<>() {
+                    public Boolean run() {
+                        try {
+                            System.loadLibrary("fallbackLinker");
+                        } catch (UnsatisfiedLinkError ule) {
+                            return false;
+                        }
+                        if (!init()) {
+                            // library failed to initialize. Do not silently mark as unsupported
+                            throw new ExceptionInInitializerError("Fallback library failed to initialize");
+                        }
+                        return true;
+                    }
+                });
+    }
+
+    static int defaultABI() { return NativeConstants.DEFAULT_ABI; }
+
+    static MemorySegment uint8Type() { return NativeConstants.UINT8_TYPE; }
+    static MemorySegment sint8Type() { return NativeConstants.SINT8_TYPE; }
+    static MemorySegment uint16Type() { return NativeConstants.UINT16_TYPE; }
+    static MemorySegment sint16Type() { return NativeConstants.SINT16_TYPE; }
+    static MemorySegment sint32Type() { return NativeConstants.SINT32_TYPE; }
+    static MemorySegment sint64Type() { return NativeConstants.SINT64_TYPE; }
+    static MemorySegment floatType() { return NativeConstants.FLOAT_TYPE; }
+    static MemorySegment doubleType() { return NativeConstants.DOUBLE_TYPE; }
+    static MemorySegment pointerType() { return NativeConstants.POINTER_TYPE; }
+    static MemorySegment voidType() { return NativeConstants.VOID_TYPE; }
+
+    // platform-dependent types
+    static int shortSize() { return NativeConstants.SIZEOF_SHORT; }
+    static int intSize() { return NativeConstants.SIZEOF_INT; }
+    static int longSize() {return NativeConstants.SIZEOF_LONG; }
+    static int wcharSize() {return NativeConstants.SIZEOF_WCHAR; }
+    static int longLongAlign() { return NativeConstants.ALIGNOF_LONG_LONG; }
+    static int doubleAlign() { return NativeConstants.ALIGNOF_DOUBLE; }
+
+    static short structTag() { return NativeConstants.STRUCT_TAG; }
+
+    private static final MethodType UPCALL_TARGET_TYPE = MethodType.methodType(void.class, MemorySegment.class, MemorySegment.class);
+
+    /**
+     * Do a libffi based downcall. This method wraps the {@code ffi_call} function
+     *
+     * @param cif a pointer to a {@code ffi_cif} struct
+     * @param target the address of the target function
+     * @param retPtr a pointer to a buffer into which the return value shall be written, or {@code null} if the target
+     *               function does not return a value
+     * @param argPtrs a pointer to an array of pointers, which each point to an argument value
+     * @param capturedState a pointer to a buffer into which captured state is written, or {@code null} if no state is
+     *                      to be captured
+     * @param capturedStateMask the bit mask indicating which state to capture
+     *
+     * @see jdk.internal.foreign.abi.CapturableState
+     */
+    static void doDowncall(MemorySegment cif, MemorySegment target, MemorySegment retPtr, MemorySegment argPtrs,
+                           MemorySegment capturedState, int capturedStateMask,
+                           Object[] heapBases, int numArgs) {
+            doDowncall(cif.address(), target.address(),
+                       retPtr == null ? 0 : retPtr.address(), argPtrs.address(),
+                       capturedState == null ? 0 : capturedState.address(), capturedStateMask,
+                       heapBases, numArgs);
+    }
+
+    /**
+     * Wrapper for {@code ffi_prep_cif}
+     *
+     * @param returnType a pointer to an @{code ffi_type} describing the return type
+     * @param numArgs the number of arguments
+     * @param paramTypes a pointer to an array of pointers, which each point to an {@code ffi_type} describing a
+     *                parameter type
+     * @param abi the abi to be used
+     * @param scope the scope into which to allocate the returned {@code ffi_cif} struct
+     * @return a pointer to a prepared {@code ffi_cif} struct
+     *
+     * @throws IllegalStateException if the call to {@code ffi_prep_cif} returns a non-zero status code
+     */
+    static MemorySegment prepCif(MemorySegment returnType, int numArgs, MemorySegment paramTypes, FFIABI abi,
+                                         Arena scope) throws IllegalStateException {
+        MemorySegment cif = scope.allocate(NativeConstants.SIZEOF_CIF);
+        checkStatus(ffi_prep_cif(cif.address(), abi.value(), numArgs, returnType.address(), paramTypes.address()));
+        return cif;
+    }
+
+    /**
+     * Wrapper for {@code ffi_prep_cif_var}. The variadic version of prep_cif
+     *
+     * @param returnType a pointer to an @{code ffi_type} describing the return type
+     * @param numFixedArgs the number of fixed arguments
+     * @param numTotalArgs the number of total arguments
+     * @param paramTypes a pointer to an array of pointers, which each point to an {@code ffi_type} describing a
+     *                parameter type
+     * @param abi the abi to be used
+     * @param scope the scope into which to allocate the returned {@code ffi_cif} struct
+     * @return a pointer to a prepared {@code ffi_cif} struct
+     *
+     * @throws IllegalStateException if the call to {@code ffi_prep_cif} returns a non-zero status code
+     */
+    static MemorySegment prepCifVar(MemorySegment returnType, int numFixedArgs, int numTotalArgs, MemorySegment paramTypes, FFIABI abi,
+                                    Arena scope) throws IllegalStateException {
+        MemorySegment cif = scope.allocate(NativeConstants.SIZEOF_CIF);
+        checkStatus(ffi_prep_cif_var(cif.address(), abi.value(), numFixedArgs, numTotalArgs, returnType.address(), paramTypes.address()));
+        return cif;
+    }
+
+    /**
+     * Create an upcallStub-style closure. This method wraps the {@code ffi_closure_alloc}
+     * and {@code ffi_prep_closure_loc} functions.
+     * <p>
+     * The closure will end up calling into {@link #doUpcall(long, long, MethodHandle)}
+     * <p>
+     * The target method handle should have the type {@code (MemorySegment, MemorySegment) -> void}. The first
+     * argument is a pointer to the buffer into which the native return value should be written. The second argument
+     * is a pointer to an array of pointers, which each point to a native argument value.
+     *
+     * @param cif a pointer to a {@code ffi_cif} struct
+     * @param target a method handle that points to the target function
+     * @param arena the scope to which to attach the created upcall stub
+     * @return the created upcall stub
+     *
+     * @throws IllegalStateException if the call to {@code ffi_prep_closure_loc} returns a non-zero status code
+     * @throws IllegalArgumentException if {@code target} does not have the right type
+     */
+    @SuppressWarnings("restricted")
+    static MemorySegment createClosure(MemorySegment cif, MethodHandle target, Arena arena)
+            throws IllegalStateException, IllegalArgumentException {
+        if (target.type() != UPCALL_TARGET_TYPE) {
+            throw new IllegalArgumentException("Target handle has wrong type: " + target.type() + " != " + UPCALL_TARGET_TYPE);
+        }
+
+        long[] ptrs = new long[3];
+        checkStatus(createClosure(cif.address(), target, ptrs));
+        long closurePtr = ptrs[0];
+        long execPtr = ptrs[1];
+        long globalTarget = ptrs[2];
+
+        return MemorySegment.ofAddress(execPtr)
+            .reinterpret(arena, unused -> freeClosure(closurePtr, globalTarget)); // restricted
+    }
+
+    // the target function for a closure call
+    private static void doUpcall(long retPtr, long argPtrs, MethodHandle target) {
+        try {
+            target.invokeExact(MemorySegment.ofAddress(retPtr), MemorySegment.ofAddress(argPtrs));
+        } catch (Throwable t) {
+            SharedUtils.handleUncaughtException(t);
+        }
+    }
+
+    /**
+     * Wrapper for {@code ffi_get_struct_offsets}
+     *
+     * @param structType a pointer to an {@code ffi_type} representing a struct
+     * @param offsetsOut a pointer to an array of {@code size_t}, with one element for each element of the struct.
+     *                   This is an 'out' parameter that will be filled in by this call
+     * @param abi the abi to be used
+     *
+     * @throws IllegalStateException if the call to {@code ffi_get_struct_offsets} returns a non-zero status code
+     */
+    static void getStructOffsets(MemorySegment structType, MemorySegment offsetsOut, FFIABI abi)
+            throws IllegalStateException {
+        checkStatus(ffi_get_struct_offsets(abi.value(), structType.address(), offsetsOut.address()));
+    }
+
+    private static void checkStatus(int code) {
+        FFIStatus status = FFIStatus.of(code);
+        if (status != FFIStatus.FFI_OK) {
+            throw new IllegalStateException("libffi call failed with status: " + status);
+        }
+    }
+
+    private static native boolean init();
+
+    private static native long sizeofCif();
+
+    private static native int createClosure(long cif, Object userData, long[] ptrs);
+    private static native void freeClosure(long closureAddress, long globalTarget);
+    private static native void doDowncall(long cif, long fn, long rvalue, long avalues,
+                                          long capturedState, int capturedStateMask,
+                                          Object[] heapBases, int numArgs);
+
+    private static native int ffi_prep_cif(long cif, int abi, int nargs, long rtype, long atypes);
+    private static native int ffi_prep_cif_var(long cif, int abi, int nfixedargs, int ntotalargs, long rtype, long atypes);
+    private static native int ffi_get_struct_offsets(int abi, long type, long offsets);
+
+    private static native int ffi_default_abi();
+    private static native short ffi_type_struct();
+
+    private static native long ffi_type_void();
+    private static native long ffi_type_uint8();
+    private static native long ffi_type_sint8();
+    private static native long ffi_type_uint16();
+    private static native long ffi_type_sint16();
+    private static native long ffi_type_uint32();
+    private static native long ffi_type_sint32();
+    private static native long ffi_type_uint64();
+    private static native long ffi_type_sint64();
+    private static native long ffi_type_float();
+    private static native long ffi_type_double();
+    private static native long ffi_type_pointer();
+    private static native int ffi_sizeof_short();
+    private static native int ffi_sizeof_int();
+    private static native int ffi_sizeof_long();
+    private static native int ffi_sizeof_wchar();
+
+    private static native int alignof_long_long();
+    private static native int alignof_double();
+
+    // put these in a separate class to avoid an UnsatisfiedLinkError
+    // when LibFallback is initialized but the library is not present
+    private static final class NativeConstants {
+        private NativeConstants() {}
+
+        static final int DEFAULT_ABI = ffi_default_abi();
+
+        static final MemorySegment UINT8_TYPE = MemorySegment.ofAddress(ffi_type_uint8());
+        static final MemorySegment SINT8_TYPE = MemorySegment.ofAddress(ffi_type_sint8());
+        static final MemorySegment UINT16_TYPE = MemorySegment.ofAddress(ffi_type_uint16());
+        static final MemorySegment SINT16_TYPE = MemorySegment.ofAddress(ffi_type_sint16());
+        static final MemorySegment SINT32_TYPE = MemorySegment.ofAddress(ffi_type_sint32());
+        static final MemorySegment SINT64_TYPE = MemorySegment.ofAddress(ffi_type_sint64());
+        static final MemorySegment FLOAT_TYPE = MemorySegment.ofAddress(ffi_type_float());
+        static final MemorySegment DOUBLE_TYPE = MemorySegment.ofAddress(ffi_type_double());
+        static final MemorySegment POINTER_TYPE = MemorySegment.ofAddress(ffi_type_pointer());
+        static final int SIZEOF_SHORT = ffi_sizeof_short();
+        static final int SIZEOF_INT = ffi_sizeof_int();
+        static final int SIZEOF_LONG = ffi_sizeof_long();
+        static final int SIZEOF_WCHAR = ffi_sizeof_wchar();
+
+        static final int ALIGNOF_LONG_LONG = alignof_long_long();
+        static final int ALIGNOF_DOUBLE = alignof_double();
+
+        static final MemorySegment VOID_TYPE = MemorySegment.ofAddress(ffi_type_void());
+        static final short STRUCT_TAG = ffi_type_struct();
+        static final long SIZEOF_CIF = sizeofCif();
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/foreign/abi/ppc64/CallArranger$1.class b/tests/test_data/std/jdk/internal/foreign/abi/ppc64/CallArranger$1.class
new file mode 100644
index 0000000000000000000000000000000000000000..babd71ad5ed80206bfc0ee4c6dddc61b3fd4f0d5
GIT binary patch
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diff --git a/tests/test_data/std/jdk/internal/foreign/abi/ppc64/CallArranger$BindingCalculator.class b/tests/test_data/std/jdk/internal/foreign/abi/ppc64/CallArranger$BindingCalculator.class
new file mode 100644
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HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/foreign/abi/ppc64/CallArranger$Bindings.class b/tests/test_data/std/jdk/internal/foreign/abi/ppc64/CallArranger$Bindings.class
new file mode 100644
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diff --git a/tests/test_data/std/jdk/internal/foreign/abi/ppc64/CallArranger$BoxBindingCalculator.class b/tests/test_data/std/jdk/internal/foreign/abi/ppc64/CallArranger$BoxBindingCalculator.class
new file mode 100644
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new file mode 100644
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new file mode 100644
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HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/foreign/abi/ppc64/CallArranger.class b/tests/test_data/std/jdk/internal/foreign/abi/ppc64/CallArranger.class
new file mode 100644
index 0000000000000000000000000000000000000000..5ed653f5cb11902379c39591ce11f20b05b0a840
GIT binary patch
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/foreign/abi/ppc64/CallArranger.java b/tests/test_data/std/jdk/internal/foreign/abi/ppc64/CallArranger.java
new file mode 100644
index 00000000..d07cd79e
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/foreign/abi/ppc64/CallArranger.java
@@ -0,0 +1,521 @@
+/*
+ * Copyright (c) 2022, 2023, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2023 SAP SE. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package jdk.internal.foreign.abi.ppc64;
+
+import jdk.internal.foreign.Utils;
+import jdk.internal.foreign.abi.ABIDescriptor;
+import jdk.internal.foreign.abi.AbstractLinker.UpcallStubFactory;
+import jdk.internal.foreign.abi.Binding;
+import jdk.internal.foreign.abi.CallingSequence;
+import jdk.internal.foreign.abi.CallingSequenceBuilder;
+import jdk.internal.foreign.abi.DowncallLinker;
+import jdk.internal.foreign.abi.LinkerOptions;
+import jdk.internal.foreign.abi.SharedUtils;
+import jdk.internal.foreign.abi.VMStorage;
+import jdk.internal.foreign.abi.ppc64.aix.AixCallArranger;
+import jdk.internal.foreign.abi.ppc64.linux.ABIv1CallArranger;
+import jdk.internal.foreign.abi.ppc64.linux.ABIv2CallArranger;
+
+import java.lang.foreign.AddressLayout;
+import java.lang.foreign.FunctionDescriptor;
+import java.lang.foreign.GroupLayout;
+import java.lang.foreign.MemoryLayout;
+import java.lang.foreign.MemorySegment;
+import java.lang.foreign.ValueLayout;
+import java.lang.invoke.MethodHandle;
+import java.lang.invoke.MethodType;
+import java.util.List;
+import java.util.Optional;
+
+import static jdk.internal.foreign.abi.ppc64.PPC64Architecture.*;
+import static jdk.internal.foreign.abi.ppc64.PPC64Architecture.Regs.*;
+
+/**
+ * For the PPC64 C ABI specifically, this class uses CallingSequenceBuilder
+ * to translate a C FunctionDescriptor into a CallingSequence, which can then be turned into a MethodHandle.
+ *
+ * This includes taking care of synthetic arguments like pointers to return buffers for 'in-memory' returns.
+ *
+ * There are minor differences between the ABIs implemented on Linux and AIX
+ * which are handled in sub-classes. Clients should access these through the provided
+ * public constants CallArranger.ABIv1/2.
+ */
+public abstract class CallArranger {
+    final boolean useABIv2 = useABIv2();
+    final boolean isAIX = isAIX();
+
+    private static final int STACK_SLOT_SIZE = 8;
+    private static final int MAX_COPY_SIZE = 8;
+    public static final int MAX_REGISTER_ARGUMENTS = 8;
+    public static final int MAX_FLOAT_REGISTER_ARGUMENTS = 13;
+
+    // This is derived from the 64-Bit ELF v2 ABI spec, restricted to what's
+    // possible when calling to/from C code. (v1 is compatible, but uses fewer output registers.)
+    private final ABIDescriptor C = abiFor(
+        new VMStorage[] { r3, r4, r5, r6, r7, r8, r9, r10 }, // GP input
+        new VMStorage[] { f1, f2, f3, f4, f5, f6, f7, f8, f9, f10, f11, f12, f13 }, // FP intput
+        new VMStorage[] { r3, r4 }, // GP output
+        new VMStorage[] { f1, f2, f3, f4, f5, f6, f7, f8 }, // FP output
+        new VMStorage[] { r0, r2, r11, r12 }, // volatile GP (excluding argument registers)
+        new VMStorage[] { f0 }, // volatile FP (excluding argument registers)
+        16, // Stack is always 16 byte aligned on PPC64
+        useABIv2 ? 32 : 48, // ABI header (excluding argument register spill slots)
+        r11, // scratch reg
+        r12  // target addr reg, otherwise used as scratch reg
+    );
+
+    public record Bindings(CallingSequence callingSequence, boolean isInMemoryReturn) {}
+
+    private record HfaRegs(VMStorage[] first, VMStorage[] second) {}
+
+    protected CallArranger() {}
+
+    public static final CallArranger ABIv1 = new ABIv1CallArranger();
+    public static final CallArranger ABIv2 = new ABIv2CallArranger();
+    public static final CallArranger AIX = new AixCallArranger();
+
+    /**
+     * Select ABI version
+     */
+    protected abstract boolean useABIv2();
+    protected abstract boolean isAIX();
+
+    public Bindings getBindings(MethodType mt, FunctionDescriptor cDesc, boolean forUpcall) {
+        return getBindings(mt, cDesc, forUpcall, LinkerOptions.empty());
+    }
+
+    public Bindings getBindings(MethodType mt, FunctionDescriptor cDesc, boolean forUpcall, LinkerOptions options) {
+        CallingSequenceBuilder csb = new CallingSequenceBuilder(C, forUpcall, options);
+
+        BindingCalculator argCalc = forUpcall ? new BoxBindingCalculator(true) : new UnboxBindingCalculator(true, options.allowsHeapAccess());
+        BindingCalculator retCalc = forUpcall ? new UnboxBindingCalculator(false, false) : new BoxBindingCalculator(false);
+
+        boolean returnInMemory = isInMemoryReturn(cDesc.returnLayout());
+        if (returnInMemory) {
+            Class<?> carrier = MemorySegment.class;
+            MemoryLayout layout = SharedUtils.C_POINTER;
+            csb.addArgumentBindings(carrier, layout, argCalc.getBindings(carrier, layout));
+        } else if (cDesc.returnLayout().isPresent()) {
+            Class<?> carrier = mt.returnType();
+            MemoryLayout layout = cDesc.returnLayout().get();
+            csb.setReturnBindings(carrier, layout, retCalc.getBindings(carrier, layout));
+        }
+
+        for (int i = 0; i < mt.parameterCount(); i++) {
+            Class<?> carrier = mt.parameterType(i);
+            MemoryLayout layout = cDesc.argumentLayouts().get(i);
+            if (options.isVarargsIndex(i)) {
+                argCalc.storageCalculator.adjustForVarArgs();
+            }
+            csb.addArgumentBindings(carrier, layout, argCalc.getBindings(carrier, layout));
+        }
+
+        return new Bindings(csb.build(), returnInMemory);
+    }
+
+    public MethodHandle arrangeDowncall(MethodType mt, FunctionDescriptor cDesc, LinkerOptions options) {
+        Bindings bindings = getBindings(mt, cDesc, false, options);
+
+        MethodHandle handle = new DowncallLinker(C, bindings.callingSequence).getBoundMethodHandle();
+
+        if (bindings.isInMemoryReturn) {
+            handle = SharedUtils.adaptDowncallForIMR(handle, cDesc, bindings.callingSequence);
+        }
+
+        return handle;
+    }
+
+    public UpcallStubFactory arrangeUpcall(MethodType mt, FunctionDescriptor cDesc, LinkerOptions options) {
+        Bindings bindings = getBindings(mt, cDesc, true, options);
+
+        final boolean dropReturn = true; /* drop return, since we don't have bindings for it */
+        return SharedUtils.arrangeUpcallHelper(mt, bindings.isInMemoryReturn, dropReturn, C,
+                bindings.callingSequence);
+    }
+
+    private boolean isInMemoryReturn(Optional<MemoryLayout> returnLayout) {
+        return returnLayout
+            .filter(GroupLayout.class::isInstance)
+            .filter(layout -> !TypeClass.isStructHFAorReturnRegisterAggregate(layout, useABIv2))
+            .isPresent();
+    }
+
+    class StorageCalculator {
+        private final boolean forArguments;
+
+        private final int[] nRegs = new int[] { 0, 0 };
+        private long stackOffset = 0;
+
+        public StorageCalculator(boolean forArguments) {
+            this.forArguments = forArguments;
+        }
+
+        VMStorage stackAlloc(long size, long alignment) {
+            long alignedStackOffset = Utils.alignUp(stackOffset, alignment);
+
+            short encodedSize = (short) size;
+            assert (encodedSize & 0xFFFF) == size;
+
+            VMStorage storage = PPC64Architecture.stackStorage(encodedSize, (int) alignedStackOffset);
+            stackOffset = alignedStackOffset + size;
+            return storage;
+        }
+
+        VMStorage regAlloc(int type) {
+            // GP regs always need to get reserved even when float regs are used.
+            int gpRegCnt = 1;
+            int fpRegCnt = (type == StorageType.INTEGER) ? 0 : 1;
+
+            // Use stack if not enough registers available.
+            if (type == StorageType.FLOAT && nRegs[StorageType.FLOAT] + fpRegCnt > MAX_FLOAT_REGISTER_ARGUMENTS) {
+                type = StorageType.INTEGER; // Try gp reg.
+            }
+            if (type == StorageType.INTEGER && nRegs[StorageType.INTEGER] + gpRegCnt > MAX_REGISTER_ARGUMENTS) return null;
+
+            VMStorage[] source = (forArguments ? C.inputStorage : C.outputStorage)[type];
+            VMStorage result = source[nRegs[type]];
+
+            nRegs[StorageType.INTEGER] += gpRegCnt;
+            nRegs[StorageType.FLOAT] += fpRegCnt;
+            return result;
+        }
+
+        // Integers need size for int to long conversion (required by ABI).
+        // FP loads and stores must use the correct IEEE 754 precision format (32/64 bit).
+        // Note: Can return a GP reg for a float!
+        VMStorage nextStorage(int type, boolean is32Bit) {
+            VMStorage reg = regAlloc(type);
+            // Stack layout computation: We need to count all arguments in order to get the correct
+            // offset for the next argument which will really use the stack.
+            // The reserved space for the Parameter Save Area is determined by the DowncallStubGenerator.
+            VMStorage stack;
+            if (!useABIv2 && !isAIX && is32Bit) {
+                stackAlloc(4, STACK_SLOT_SIZE); // Skip first half of stack slot.
+                stack = stackAlloc(4, 4);
+            } else {
+                stack = stackAlloc(is32Bit ? 4 : 8, STACK_SLOT_SIZE);
+            }
+            if (reg == null) return stack;
+            if (is32Bit) {
+                reg = new VMStorage(reg.type(), PPC64Architecture.REG32_MASK, reg.indexOrOffset());
+            }
+            return reg;
+        }
+
+        /* The struct is split into 8-byte chunks, and those chunks are passed in registers or on the stack.
+           ABIv1 requires shifting if the struct occupies more than one 8-byte chunk and the last one is not full.
+           Here's an example for passing an 11 byte struct with ABIv1:
+        offset         : 0 .... 32 ..... 64 ..... 96 .... 128
+        values         : xxxxxxxx|yyyyyyyy|zzzzzz??|????????   (can't touch bits 96..128)
+        Load into int  :                  V        +--------+
+                                          |                 |
+                                          +--------+        |
+                                                   V        V
+        In register    :                   ????????|??zzzzzz   (LSBs are zz...z)
+        Shift left     :                   zzzzzz00|00000000   (LSBs are 00...0)
+        Write long     :                  V                 V
+        Result         : xxxxxxxx|yyyyyyyy|zzzzzz00|00000000
+        */
+
+        // Regular struct, no HFA.
+        VMStorage[] structAlloc(MemoryLayout layout) {
+            // Allocate enough gp slots (regs and stack) such that the struct fits in them.
+            int numChunks = (int) Utils.alignUp(layout.byteSize(), MAX_COPY_SIZE) / MAX_COPY_SIZE;
+            VMStorage[] result = new VMStorage[numChunks];
+            for (int i = 0; i < numChunks; i++) {
+                result[i] = nextStorage(StorageType.INTEGER, false);
+            }
+            return result;
+        }
+
+        HfaRegs hfaAlloc(List<MemoryLayout> scalarLayouts) {
+            // Determine count and type.
+            int count = scalarLayouts.size();
+            Class<?> elementCarrier = ((ValueLayout) (scalarLayouts.get(0))).carrier();
+            int elementSize = (elementCarrier == float.class) ? 4 : 8;
+
+            // Allocate registers.
+            int fpRegCnt = count;
+            // Rest will get put into a struct. Compute number of 64 bit slots.
+            int structSlots = 0;
+            boolean needOverlapping = false; // See "no partial DW rule" below.
+
+            int availableFpRegs = MAX_FLOAT_REGISTER_ARGUMENTS - nRegs[StorageType.FLOAT];
+            if (count > availableFpRegs) {
+                fpRegCnt = availableFpRegs;
+                int remainingElements = count - availableFpRegs;
+                if (elementCarrier == float.class) {
+                    if ((fpRegCnt & 1) != 0) {
+                        needOverlapping = true;
+                        remainingElements--; // After overlapped one.
+                    }
+                    structSlots = (remainingElements + 1) / 2;
+                } else {
+                    structSlots = remainingElements;
+                }
+            }
+
+            VMStorage[] source = (forArguments ? C.inputStorage : C.outputStorage)[StorageType.FLOAT];
+            VMStorage[] result  = new VMStorage[fpRegCnt + structSlots],
+                        result2 = new VMStorage[fpRegCnt + structSlots]; // For overlapping.
+            if (elementCarrier == float.class) {
+                // Mark elements as single precision (32 bit).
+                for (int i = 0; i < fpRegCnt; i++) {
+                    VMStorage sourceReg = source[nRegs[StorageType.FLOAT] + i];
+                    result[i] = new VMStorage(StorageType.FLOAT, PPC64Architecture.REG32_MASK,
+                                              sourceReg.indexOrOffset());
+                }
+            } else {
+                for (int i = 0; i < fpRegCnt; i++) {
+                    result[i] = source[nRegs[StorageType.FLOAT] + i];
+                }
+            }
+
+            nRegs[StorageType.FLOAT] += fpRegCnt;
+            // Reserve GP regs and stack slots for the packed HFA (when using single precision).
+            int gpRegCnt = (elementCarrier == float.class) ? ((fpRegCnt + 1) / 2)
+                                                           : fpRegCnt;
+            nRegs[StorageType.INTEGER] += gpRegCnt;
+            stackAlloc(fpRegCnt * elementSize, STACK_SLOT_SIZE);
+
+            if (needOverlapping) {
+                // "no partial DW rule": Put GP reg or stack slot into result2.
+                // Note: Can only happen with forArguments = true.
+                VMStorage overlappingReg;
+                if (nRegs[StorageType.INTEGER] <= MAX_REGISTER_ARGUMENTS) {
+                    VMStorage allocatedGpReg = C.inputStorage[StorageType.INTEGER][nRegs[StorageType.INTEGER] - 1];
+                    overlappingReg = new VMStorage(StorageType.INTEGER,
+                                                   PPC64Architecture.REG64_MASK, allocatedGpReg.indexOrOffset());
+                } else {
+                    overlappingReg = new VMStorage(StorageType.STACK,
+                                                   (short) STACK_SLOT_SIZE, (int) stackOffset - 4);
+                    stackOffset += 4; // We now have a 64 bit slot, but reserved only 32 bit before.
+                }
+                result2[fpRegCnt - 1] = overlappingReg;
+            }
+
+            // Allocate rest as struct.
+            for (int i = 0; i < structSlots; i++) {
+                result[fpRegCnt + i] = nextStorage(StorageType.INTEGER, false);
+            }
+
+            return new HfaRegs(result, result2);
+        }
+
+        void adjustForVarArgs() {
+            // PPC64 can pass VarArgs in GP regs. But we're not using FP regs.
+            nRegs[StorageType.FLOAT] = MAX_FLOAT_REGISTER_ARGUMENTS;
+        }
+    }
+
+    abstract class BindingCalculator {
+        protected final StorageCalculator storageCalculator;
+
+        protected BindingCalculator(boolean forArguments) {
+            this.storageCalculator = new StorageCalculator(forArguments);
+        }
+
+        abstract List<Binding> getBindings(Class<?> carrier, MemoryLayout layout);
+    }
+
+    // Compute recipe for transfering arguments / return values to C from Java.
+    class UnboxBindingCalculator extends BindingCalculator {
+        private final boolean useAddressPairs;
+
+        UnboxBindingCalculator(boolean forArguments, boolean useAddressPairs) {
+            super(forArguments);
+            this.useAddressPairs = useAddressPairs;
+        }
+
+        @Override
+        List<Binding> getBindings(Class<?> carrier, MemoryLayout layout) {
+            TypeClass argumentClass = TypeClass.classifyLayout(layout, useABIv2, isAIX);
+            Binding.Builder bindings = Binding.builder();
+            switch (argumentClass) {
+                case STRUCT_REGISTER -> {
+                    assert carrier == MemorySegment.class;
+                    VMStorage[] regs = storageCalculator.structAlloc(layout);
+                    final boolean isLargeABIv1Struct = !useABIv2 &&
+                        (isAIX || layout.byteSize() > MAX_COPY_SIZE);
+                    long offset = 0;
+                    for (VMStorage storage : regs) {
+                        // Last slot may be partly used.
+                        final long size = Math.min(layout.byteSize() - offset, MAX_COPY_SIZE);
+                        int shiftAmount = 0;
+                        Class<?> type = SharedUtils.primitiveCarrierForSize(size, false);
+                        if (offset + size < layout.byteSize()) {
+                            bindings.dup();
+                        } else if (isLargeABIv1Struct) {
+                            // Last slot requires shift.
+                            shiftAmount = MAX_COPY_SIZE - (int) size;
+                        }
+                        bindings.bufferLoad(offset, type, (int) size);
+                        if (shiftAmount != 0) {
+                            bindings.shiftLeft(shiftAmount, type)
+                                    .vmStore(storage, long.class);
+                        } else {
+                            bindings.vmStore(storage, type);
+                        }
+                        offset += size;
+                    }
+                }
+                case STRUCT_HFA -> {
+                    assert carrier == MemorySegment.class;
+                    List<MemoryLayout> scalarLayouts = TypeClass.scalarLayouts((GroupLayout) layout);
+                    HfaRegs regs = storageCalculator.hfaAlloc(scalarLayouts);
+                    final long baseSize = scalarLayouts.get(0).byteSize();
+                    long offset = 0;
+                    for (int index = 0; index < regs.first().length; index++) {
+                        VMStorage storage = regs.first()[index];
+                        // Floats are 4 Bytes, Double, GP reg and stack slots 8 Bytes (except maybe last slot).
+                        long size = (baseSize == 4 &&
+                                     (storage.type() == StorageType.FLOAT || layout.byteSize() - offset < 8)) ? 4 : 8;
+                        Class<?> type = SharedUtils.primitiveCarrierForSize(size, storage.type() == StorageType.FLOAT);
+                        if (offset + size < layout.byteSize()) {
+                            bindings.dup();
+                        }
+                        bindings.bufferLoad(offset, type)
+                                .vmStore(storage, type);
+                        VMStorage storage2 = regs.second()[index];
+                        if (storage2 != null) {
+                            // We have a second slot to fill (always 64 bit GP reg or stack slot).
+                            size = 8;
+                            if (offset + size < layout.byteSize()) {
+                                bindings.dup();
+                            }
+                            bindings.bufferLoad(offset, long.class)
+                                    .vmStore(storage2, long.class);
+                        }
+                        offset += size;
+                    }
+                }
+                case POINTER -> {
+                    VMStorage storage = storageCalculator.nextStorage(StorageType.INTEGER, false);
+                    if (useAddressPairs) {
+                        bindings.dup()
+                                .segmentBase()
+                                .vmStore(storage, Object.class)
+                                .segmentOffsetAllowHeap()
+                                .vmStore(null, long.class);
+                    } else {
+                        bindings.unboxAddress();
+                        bindings.vmStore(storage, long.class);
+                    }
+                }
+                case INTEGER -> {
+                    // ABI requires all int types to get extended to 64 bit.
+                    VMStorage storage = storageCalculator.nextStorage(StorageType.INTEGER, false);
+                    bindings.vmStore(storage, carrier);
+                }
+                case FLOAT -> {
+                    VMStorage storage = storageCalculator.nextStorage(StorageType.FLOAT, carrier == float.class);
+                    bindings.vmStore(storage, carrier);
+                }
+                default -> throw new UnsupportedOperationException("Unhandled class " + argumentClass);
+            }
+            return bindings.build();
+        }
+    }
+
+    // Compute recipe for transfering arguments / return values from C to Java.
+    class BoxBindingCalculator extends BindingCalculator {
+        BoxBindingCalculator(boolean forArguments) {
+            super(forArguments);
+        }
+
+        @Override
+        List<Binding> getBindings(Class<?> carrier, MemoryLayout layout) {
+            TypeClass argumentClass = TypeClass.classifyLayout(layout, useABIv2, isAIX);
+            Binding.Builder bindings = Binding.builder();
+            switch (argumentClass) {
+                case STRUCT_REGISTER -> {
+                    assert carrier == MemorySegment.class;
+                    bindings.allocate(layout);
+                    VMStorage[] regs = storageCalculator.structAlloc(layout);
+                    final boolean isLargeABIv1Struct = !useABIv2 &&
+                        (isAIX || layout.byteSize() > MAX_COPY_SIZE);
+                    long offset = 0;
+                    for (VMStorage storage : regs) {
+                        // Last slot may be partly used.
+                        final long size = Math.min(layout.byteSize() - offset, MAX_COPY_SIZE);
+                        int shiftAmount = 0;
+                        Class<?> type = SharedUtils.primitiveCarrierForSize(size, false);
+                        if (isLargeABIv1Struct && offset + size >= layout.byteSize()) {
+                            // Last slot requires shift.
+                            shiftAmount = MAX_COPY_SIZE - (int) size;
+                        }
+                        bindings.dup();
+                        if (shiftAmount != 0) {
+                            bindings.vmLoad(storage, long.class)
+                                    .shiftRight(shiftAmount, type);
+                        } else {
+                            bindings.vmLoad(storage, type);
+                        }
+                        bindings.bufferStore(offset, type, (int) size);
+                        offset += size;
+                    }
+                }
+                case STRUCT_HFA -> {
+                    assert carrier == MemorySegment.class;
+                    bindings.allocate(layout);
+                    List<MemoryLayout> scalarLayouts = TypeClass.scalarLayouts((GroupLayout) layout);
+                    HfaRegs regs = storageCalculator.hfaAlloc(scalarLayouts);
+                    final long baseSize = scalarLayouts.get(0).byteSize();
+                    long offset = 0;
+                    for (int index = 0; index < regs.first().length; index++) {
+                        // Use second if available since first one only contains one 32 bit value.
+                        VMStorage storage = regs.second()[index] == null ? regs.first()[index] : regs.second()[index];
+                        // Floats are 4 Bytes, Double, GP reg and stack slots 8 Bytes (except maybe last slot).
+                        final long size = (baseSize == 4 &&
+                                           (storage.type() == StorageType.FLOAT || layout.byteSize() - offset < 8)) ? 4 : 8;
+                        Class<?> type = SharedUtils.primitiveCarrierForSize(size, storage.type() == StorageType.FLOAT);
+                        bindings.dup()
+                                .vmLoad(storage, type)
+                                .bufferStore(offset, type);
+                        offset += size;
+                    }
+                }
+                case POINTER -> {
+                    AddressLayout addressLayout = (AddressLayout) layout;
+                    VMStorage storage = storageCalculator.nextStorage(StorageType.INTEGER, false);
+                    bindings.vmLoad(storage, long.class)
+                            .boxAddressRaw(Utils.pointeeByteSize(addressLayout), Utils.pointeeByteAlign(addressLayout));
+                }
+                case INTEGER -> {
+                    // We could use carrier != long.class for BoxBindingCalculator, but C always uses 64 bit slots.
+                    VMStorage storage = storageCalculator.nextStorage(StorageType.INTEGER, false);
+                    bindings.vmLoad(storage, carrier);
+                }
+                case FLOAT -> {
+                    VMStorage storage = storageCalculator.nextStorage(StorageType.FLOAT, carrier == float.class);
+                    bindings.vmLoad(storage, carrier);
+                }
+                default -> throw new UnsupportedOperationException("Unhandled class " + argumentClass);
+            }
+            return bindings.build();
+        }
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/foreign/abi/ppc64/PPC64Architecture$Regs.class b/tests/test_data/std/jdk/internal/foreign/abi/ppc64/PPC64Architecture$Regs.class
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diff --git a/tests/test_data/std/jdk/internal/foreign/abi/ppc64/PPC64Architecture$StorageType.class b/tests/test_data/std/jdk/internal/foreign/abi/ppc64/PPC64Architecture$StorageType.class
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Qb%b+MU2~H#!bQ9L3nc<s{Qv*}

literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/foreign/abi/ppc64/PPC64Architecture.class b/tests/test_data/std/jdk/internal/foreign/abi/ppc64/PPC64Architecture.class
new file mode 100644
index 0000000000000000000000000000000000000000..5439dad229d89ab22172358de1cf2740b2222d79
GIT binary patch
literal 3513
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/foreign/abi/ppc64/PPC64Architecture.java b/tests/test_data/std/jdk/internal/foreign/abi/ppc64/PPC64Architecture.java
new file mode 100644
index 00000000..d9391e40
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/foreign/abi/ppc64/PPC64Architecture.java
@@ -0,0 +1,180 @@
+/*
+ * Copyright (c) 2020, 2023, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2023 SAP SE. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package jdk.internal.foreign.abi.ppc64;
+
+import jdk.internal.foreign.abi.ABIDescriptor;
+import jdk.internal.foreign.abi.Architecture;
+import jdk.internal.foreign.abi.StubLocations;
+import jdk.internal.foreign.abi.VMStorage;
+
+public final class PPC64Architecture implements Architecture {
+    public static final Architecture INSTANCE = new PPC64Architecture();
+
+    // Needs to be consistent with vmstorage_ppc.hpp.
+    public static final short REG32_MASK = 0b0000_0000_0000_0001;
+    public static final short REG64_MASK = 0b0000_0000_0000_0011;
+
+    private static final int INTEGER_REG_SIZE = 8;
+    private static final int FLOAT_REG_SIZE = 8;
+    private static final int STACK_SLOT_SIZE = 8;
+
+    // Suppresses default constructor, ensuring non-instantiability.
+    private PPC64Architecture() {
+    }
+
+    @Override
+    public boolean isStackType(int cls) {
+        return cls == StorageType.STACK;
+    }
+
+    @Override
+    public int typeSize(int cls) {
+        return switch (cls) {
+            case StorageType.INTEGER -> INTEGER_REG_SIZE;
+            case StorageType.FLOAT   -> FLOAT_REG_SIZE;
+            // STACK is deliberately omitted
+            default -> throw new IllegalArgumentException("Invalid Storage Class: " + cls);
+        };
+    }
+
+    public interface StorageType {
+        byte INTEGER = 0;
+        byte FLOAT = 1;
+        byte STACK = 2;
+        byte PLACEHOLDER = 3;
+    }
+
+    public static class Regs { // break circular dependency
+        public static final VMStorage r0  = integerRegister(0);
+        public static final VMStorage r1  = integerRegister(1);
+        public static final VMStorage r2  = integerRegister(2);
+        public static final VMStorage r3  = integerRegister(3);
+        public static final VMStorage r4  = integerRegister(4);
+        public static final VMStorage r5  = integerRegister(5);
+        public static final VMStorage r6  = integerRegister(6);
+        public static final VMStorage r7  = integerRegister(7);
+        public static final VMStorage r8  = integerRegister(8);
+        public static final VMStorage r9  = integerRegister(9);
+        public static final VMStorage r10 = integerRegister(10);
+        public static final VMStorage r11 = integerRegister(11);
+        public static final VMStorage r12 = integerRegister(12);
+        public static final VMStorage r13 = integerRegister(13);
+        public static final VMStorage r14 = integerRegister(14);
+        public static final VMStorage r15 = integerRegister(15);
+        public static final VMStorage r16 = integerRegister(16);
+        public static final VMStorage r17 = integerRegister(17);
+        public static final VMStorage r18 = integerRegister(18);
+        public static final VMStorage r19 = integerRegister(19);
+        public static final VMStorage r20 = integerRegister(20);
+        public static final VMStorage r21 = integerRegister(21);
+        public static final VMStorage r22 = integerRegister(22);
+        public static final VMStorage r23 = integerRegister(23);
+        public static final VMStorage r24 = integerRegister(24);
+        public static final VMStorage r25 = integerRegister(25);
+        public static final VMStorage r26 = integerRegister(26);
+        public static final VMStorage r27 = integerRegister(27);
+        public static final VMStorage r28 = integerRegister(28);
+        public static final VMStorage r29 = integerRegister(29);
+        public static final VMStorage r30 = integerRegister(30);
+        public static final VMStorage r31 = integerRegister(31);
+
+        public static final VMStorage f0  = floatRegister(0);
+        public static final VMStorage f1  = floatRegister(1);
+        public static final VMStorage f2  = floatRegister(2);
+        public static final VMStorage f3  = floatRegister(3);
+        public static final VMStorage f4  = floatRegister(4);
+        public static final VMStorage f5  = floatRegister(5);
+        public static final VMStorage f6  = floatRegister(6);
+        public static final VMStorage f7  = floatRegister(7);
+        public static final VMStorage f8  = floatRegister(8);
+        public static final VMStorage f9  = floatRegister(9);
+        public static final VMStorage f10 = floatRegister(10);
+        public static final VMStorage f11 = floatRegister(11);
+        public static final VMStorage f12 = floatRegister(12);
+        public static final VMStorage f13 = floatRegister(13);
+        public static final VMStorage f14 = floatRegister(14);
+        public static final VMStorage f15 = floatRegister(15);
+        public static final VMStorage f16 = floatRegister(16);
+        public static final VMStorage f17 = floatRegister(17);
+        public static final VMStorage f18 = floatRegister(18);
+        public static final VMStorage f19 = floatRegister(19);
+        public static final VMStorage f20 = floatRegister(20);
+        public static final VMStorage f21 = floatRegister(21);
+        public static final VMStorage f22 = floatRegister(22);
+        public static final VMStorage f23 = floatRegister(23);
+        public static final VMStorage f24 = floatRegister(24);
+        public static final VMStorage f25 = floatRegister(25);
+        public static final VMStorage f26 = floatRegister(26);
+        public static final VMStorage f27 = floatRegister(27);
+        public static final VMStorage f28 = floatRegister(28);
+        public static final VMStorage f29 = floatRegister(29);
+        public static final VMStorage f30 = floatRegister(30);
+        public static final VMStorage f31 = floatRegister(31);
+    }
+
+    private static VMStorage integerRegister(int index) {
+        return new VMStorage(StorageType.INTEGER, REG64_MASK, index, "r" + index);
+    }
+
+    private static VMStorage floatRegister(int index) {
+        return new VMStorage(StorageType.FLOAT, REG64_MASK, index, "v" + index);
+    }
+
+    public static VMStorage stackStorage(short size, int byteOffset) {
+        return new VMStorage(StorageType.STACK, size, byteOffset);
+    }
+
+    public static ABIDescriptor abiFor(VMStorage[] inputIntRegs,
+                                       VMStorage[] inputFloatRegs,
+                                       VMStorage[] outputIntRegs,
+                                       VMStorage[] outputFloatRegs,
+                                       VMStorage[] volatileIntRegs,
+                                       VMStorage[] volatileFloatRegs,
+                                       int stackAlignment,
+                                       int shadowSpace,
+                                       VMStorage scratch1, VMStorage scratch2) {
+        return new ABIDescriptor(
+            INSTANCE,
+            new VMStorage[][] {
+                inputIntRegs,
+                inputFloatRegs,
+            },
+            new VMStorage[][] {
+                outputIntRegs,
+                outputFloatRegs,
+            },
+            new VMStorage[][] {
+                volatileIntRegs,
+                volatileFloatRegs,
+            },
+            stackAlignment,
+            shadowSpace,
+            scratch1, scratch2,
+            StubLocations.TARGET_ADDRESS.storage(StorageType.PLACEHOLDER),
+            StubLocations.RETURN_BUFFER.storage(StorageType.PLACEHOLDER),
+            StubLocations.CAPTURED_STATE_BUFFER.storage(StorageType.PLACEHOLDER));
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/foreign/abi/ppc64/TypeClass.class b/tests/test_data/std/jdk/internal/foreign/abi/ppc64/TypeClass.class
new file mode 100644
index 0000000000000000000000000000000000000000..d0577e03153231ba6f48152d62ac189b1a56480e
GIT binary patch
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/foreign/abi/ppc64/TypeClass.java b/tests/test_data/std/jdk/internal/foreign/abi/ppc64/TypeClass.java
new file mode 100644
index 00000000..b04d4abf
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/foreign/abi/ppc64/TypeClass.java
@@ -0,0 +1,136 @@
+/*
+ * Copyright (c) 2022, 2023, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2023 SAP SE. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package jdk.internal.foreign.abi.ppc64;
+
+import java.lang.foreign.GroupLayout;
+import java.lang.foreign.MemoryLayout;
+import java.lang.foreign.MemorySegment;
+import java.lang.foreign.SequenceLayout;
+import java.lang.foreign.ValueLayout;
+import java.util.List;
+import java.util.ArrayList;
+
+public enum TypeClass {
+    STRUCT_REGISTER,
+    STRUCT_HFA, // Homogeneous Float Aggregate
+    POINTER,
+    INTEGER,
+    FLOAT;
+
+    private static final int MAX_RETURN_AGGREGATE_REGS_SIZE = 2;
+
+    private static TypeClass classifyValueType(ValueLayout type) {
+        Class<?> carrier = type.carrier();
+        if (carrier == boolean.class || carrier == byte.class || carrier == char.class ||
+            carrier == short.class || carrier == int.class || carrier == long.class) {
+            return INTEGER;
+        } else if (carrier == float.class || carrier == double.class) {
+            return FLOAT;
+        } else if (carrier == MemorySegment.class) {
+            return POINTER;
+        } else {
+            throw new IllegalStateException("Cannot get here: " + carrier.getName());
+        }
+    }
+
+    static boolean isReturnRegisterAggregate(MemoryLayout type) {
+        return type.byteSize() <= MAX_RETURN_AGGREGATE_REGS_SIZE * 8;
+    }
+
+    static List<MemoryLayout> scalarLayouts(GroupLayout gl) {
+        List<MemoryLayout> out = new ArrayList<>();
+        scalarLayoutsInternal(out, gl);
+        return out;
+    }
+
+    private static void scalarLayoutsInternal(List<MemoryLayout> out, GroupLayout gl) {
+        for (MemoryLayout member : gl.memberLayouts()) {
+            if (member instanceof GroupLayout memberGl) {
+                scalarLayoutsInternal(out, memberGl);
+            } else if (member instanceof SequenceLayout memberSl) {
+                for (long i = 0; i < memberSl.elementCount(); i++) {
+                    out.add(memberSl.elementLayout());
+                }
+            } else {
+                // padding or value layouts
+                out.add(member);
+            }
+        }
+    }
+
+    static boolean isHomogeneousFloatAggregate(MemoryLayout type, boolean useABIv2) {
+        List<MemoryLayout> scalarLayouts = scalarLayouts((GroupLayout) type);
+
+        final int numElements = scalarLayouts.size();
+        if (numElements > (useABIv2 ? 8 : 1) || numElements == 0)
+            return false;
+
+        MemoryLayout baseType = scalarLayouts.get(0);
+
+        if (!(baseType instanceof ValueLayout))
+            return false;
+
+        TypeClass baseArgClass = classifyValueType((ValueLayout) baseType);
+        if (baseArgClass != FLOAT)
+           return false;
+
+        for (MemoryLayout elem : scalarLayouts) {
+            if (!(elem instanceof ValueLayout))
+                return false;
+
+            TypeClass argClass = classifyValueType((ValueLayout) elem);
+            if (elem.byteSize() != baseType.byteSize() ||
+                    elem.byteAlignment() != baseType.byteAlignment() ||
+                    baseArgClass != argClass) {
+                return false;
+            }
+        }
+
+        return true;
+    }
+
+    private static TypeClass classifyStructType(MemoryLayout layout, boolean useABIv2, boolean isAIX) {
+        if (!isAIX && isHomogeneousFloatAggregate(layout, useABIv2)) {
+            return TypeClass.STRUCT_HFA;
+        }
+        return TypeClass.STRUCT_REGISTER;
+    }
+
+    static boolean isStructHFAorReturnRegisterAggregate(MemoryLayout layout, boolean useABIv2) {
+        if (!(layout instanceof GroupLayout) || !useABIv2) return false;
+        return isHomogeneousFloatAggregate(layout, true) || isReturnRegisterAggregate(layout);
+    }
+
+    public static TypeClass classifyLayout(MemoryLayout type, boolean useABIv2, boolean isAIX) {
+        if (type instanceof ValueLayout) {
+            return classifyValueType((ValueLayout) type);
+        } else if (type instanceof GroupLayout) {
+            return classifyStructType(type, useABIv2, isAIX);
+        } else {
+            throw new IllegalArgumentException("Unhandled type " + type);
+        }
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/foreign/abi/ppc64/aix/AixCallArranger.class b/tests/test_data/std/jdk/internal/foreign/abi/ppc64/aix/AixCallArranger.class
new file mode 100644
index 0000000000000000000000000000000000000000..51dcd112b83f3db50be5152581a089605996ec12
GIT binary patch
literal 508
zcmb7=&q~8U5XQgFpQgrYwfX`c1g+viDP9yI282TJq7?DAN!PkHCS{Y9K9m<vf(IYK
zhZ1M2NUegnhws~&o!`u`uW!#U077i|uwZ*|8gNl#*c%P*xXMbYGm-L}TuU{~xQG=W
zkCVeL4@H^=T8nHbHAC%KWvV=3uy=O*9_kF8KX{?0JW$i`ZJaP4NQP#lGI?Iz$5LO4
zIHgQ0$`g_Hg;pm1OgiPQDj2%a|3@7$)T=@Ur@cvMw)8cFtBRm^#o%A$l}_ZDGJ`i4
zc03q~iNF>-`Ym&85QrM-5=ESxk-P0Dut&OB@JY=x2wEm>d=!wcP~>10P0AQ}pWM`0
b_Jh$ma(j-nzR0zoq_ar2e<2yxXZ>66u&`r%

literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/foreign/abi/ppc64/aix/AixCallArranger.java b/tests/test_data/std/jdk/internal/foreign/abi/ppc64/aix/AixCallArranger.java
new file mode 100644
index 00000000..9ee9ad1e
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/foreign/abi/ppc64/aix/AixCallArranger.java
@@ -0,0 +1,44 @@
+/*
+ * Copyright (c) 2021, 2023, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2023 SAP SE. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package jdk.internal.foreign.abi.ppc64.aix;
+
+import jdk.internal.foreign.abi.ppc64.CallArranger;
+
+/**
+ * PPC64 CallArranger specialized for AIX.
+ */
+public class AixCallArranger extends CallArranger {
+
+    @Override
+    protected boolean useABIv2() {
+        return false;
+    }
+
+    @Override
+    protected boolean isAIX() {
+        return true;
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/foreign/abi/ppc64/aix/AixPPC64Linker$1Holder.class b/tests/test_data/std/jdk/internal/foreign/abi/ppc64/aix/AixPPC64Linker$1Holder.class
new file mode 100644
index 0000000000000000000000000000000000000000..591a227dcd5dfac5c84029aebe29d52dbe049d9a
GIT binary patch
literal 718
zcmb7C$w~u35PhADnK&6u+;=_bA$qVC7Z61VLnMJ11B&3WGihVTu_w%o;%|uuLBS93
zqr~dO1&_IOb-n6(^}4D)K40Gfcvx|eLfVGqVh9<ALPtCZ9thp$XU&fE6Nb!@(keM-
zNEg>HZDbj?JFQ!;bRr`y0)8DvQnfV~O~t!ie}9(?^~g)=vC;7McWX-D%E*C@^e}R8
zZH%}WMV{ecV3xJ*N*J_c#E`Al&o4@KugtJh8<^*i!SceEWXO{|S--z)%IHEg1471Y
zp)Z0<5h>$;gI02*Vur)POZ`ZulG!6a`0k{09^Oa3JW;0N#Q#=pnhB7yvi5^8R=RyE
zlbf*RVjc?&xwcHII!=W4DRr;7KDZ<!r7q*762>%Lx2m;_yg<aUq%UUr9mW>TDn%Q@
zs4Pv3ZpNb(A*4VzPL>&D;|1)g7apV2giUaqPPhL66PP3~i>cq_)gBp;dxL%Tg5hU4
jhJxXbVha|g2}@xHvt%t=pgAn|5F1Nm9eST5yNtpYQU$8O

literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/foreign/abi/ppc64/aix/AixPPC64Linker.class b/tests/test_data/std/jdk/internal/foreign/abi/ppc64/aix/AixPPC64Linker.class
new file mode 100644
index 0000000000000000000000000000000000000000..745bbb7bb012e46397b76343fe7b6dfc4ce06a4d
GIT binary patch
literal 3552
zcmcgu>r)d~6#rcaY!cUk_@vbu1r>-G5v0{nYX~5rA)yASR9m~*+=PW?H*PiveZTC}
zKDC|E@9p$sOJ|_1GktvRpVaAedhTw31c{9O&<w-9d+#~tp2zPz{`}{cUjan%wGTC@
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zRf9Yv_;3vtofPO~Kds{DSpxf>RtB5?*E^@(L{GD3iL#qkL0i|c0_g|Z)HtMmT7h18
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z-@+0fkI_7UgGASP4~M4ip=D|XN1Bc<qpjJqjN?rq+69);)zm|qW%RD#>~DhaDIp~C
z4Z62ryRgpI5e%##CakJ;ta_Z>1e`}JA~;1u%oPkkqao%NhH(cYj-?%B-Cn$k>sX*2
z*;TSx>=yB|<A=L=g(zz98r{pN{To*#H2j6$I^v+V?|KFo=}SoPFJUxzymJ{T5enD8
zZYUCKFA~+-JAS;5H=K9;coT0qk?`YfyhB!aM6a$U|GACwQ&r@@TU9=z26Ka66d*c5
z?}(@qh%RrGe5ni-o|5J+6yGC&zP|>qlcclwH7-GM{`gPOe#B)F6Bm?^I21vG?{R9d
uLHhcD?rQKMKBCn_R5kdRc86&%FnJS=_=Mj0tlo#uiQ`LJZ_)Zyz3*RpFvNcV

literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/foreign/abi/ppc64/aix/AixPPC64Linker.java b/tests/test_data/std/jdk/internal/foreign/abi/ppc64/aix/AixPPC64Linker.java
new file mode 100644
index 00000000..503dac3e
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/foreign/abi/ppc64/aix/AixPPC64Linker.java
@@ -0,0 +1,90 @@
+/*
+ * Copyright (c) 2022, 2024, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2023 SAP SE. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package jdk.internal.foreign.abi.ppc64.aix;
+
+import jdk.internal.foreign.abi.AbstractLinker;
+import jdk.internal.foreign.abi.LinkerOptions;
+import jdk.internal.foreign.abi.SharedUtils;
+import jdk.internal.foreign.abi.ppc64.CallArranger;
+
+import java.lang.foreign.FunctionDescriptor;
+import java.lang.foreign.MemoryLayout;
+import java.lang.foreign.ValueLayout;
+import java.lang.invoke.MethodHandle;
+import java.lang.invoke.MethodType;
+import java.nio.ByteOrder;
+import java.util.Map;
+
+public final class AixPPC64Linker extends AbstractLinker {
+
+    static final Map<String, MemoryLayout> CANONICAL_LAYOUTS =
+            SharedUtils.canonicalLayouts(ValueLayout.JAVA_LONG, ValueLayout.JAVA_LONG, ValueLayout.JAVA_INT);
+
+    public static AixPPC64Linker getInstance() {
+        final class Holder {
+            private static final AixPPC64Linker INSTANCE = new AixPPC64Linker();
+        }
+
+        return Holder.INSTANCE;
+    }
+
+    private AixPPC64Linker() {
+        // Ensure there is only one instance
+    }
+
+    @Override
+    protected void checkStructMember(MemoryLayout member, long offset) {
+        // special case double members that are not the first member
+        // see: https://www.ibm.com/docs/en/xl-c-and-cpp-aix/16.1?topic=data-using-alignment-modes
+        // Note: It is possible to enforce 8-byte alignment by #pragma align (natural)
+        // Therefore, we use normal checks if we are already 8-byte aligned.
+        if ((offset % 8 != 0) && (member instanceof ValueLayout vl && vl.carrier() == double.class)) {
+            if (vl.byteAlignment() != 4) {
+                throw new IllegalArgumentException("double struct member " + vl + " at offset " + offset + " should be 4-byte aligned");
+            }
+            if (vl.order() != ByteOrder.BIG_ENDIAN) {
+                throw new IllegalArgumentException("double struct member " + vl + " at offset " + offset + " has an unexpected byte order");
+            }
+        } else {
+            super.checkStructMember(member, offset);
+        }
+    }
+
+    @Override
+    protected MethodHandle arrangeDowncall(MethodType inferredMethodType, FunctionDescriptor function, LinkerOptions options) {
+        return CallArranger.AIX.arrangeDowncall(inferredMethodType, function, options);
+    }
+
+    @Override
+    protected UpcallStubFactory arrangeUpcall(MethodType targetType, FunctionDescriptor function, LinkerOptions options) {
+        return CallArranger.AIX.arrangeUpcall(targetType, function, options);
+    }
+
+    @Override
+    public Map<String, MemoryLayout> canonicalLayouts() {
+        return CANONICAL_LAYOUTS;
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/foreign/abi/ppc64/linux/ABIv1CallArranger.class b/tests/test_data/std/jdk/internal/foreign/abi/ppc64/linux/ABIv1CallArranger.class
new file mode 100644
index 0000000000000000000000000000000000000000..19d0676464806fea4e469588312dd787b99fc923
GIT binary patch
literal 518
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zr|h}x#hj^jlD>?)(rOofB!lc)r-c2^|Hd5<ig~Ks8ujV&mxO{&o9zoi=`6`@U!7<-
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cU7hFOJDnldXGrgpT>1l9`++1ZPy1Kj0HwKRQ~&?~

literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/foreign/abi/ppc64/linux/ABIv1CallArranger.java b/tests/test_data/std/jdk/internal/foreign/abi/ppc64/linux/ABIv1CallArranger.java
new file mode 100644
index 00000000..a9bdeffd
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/foreign/abi/ppc64/linux/ABIv1CallArranger.java
@@ -0,0 +1,44 @@
+/*
+ * Copyright (c) 2021, 2023, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2023 SAP SE. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package jdk.internal.foreign.abi.ppc64.linux;
+
+import jdk.internal.foreign.abi.ppc64.CallArranger;
+
+/**
+ * PPC64 CallArranger specialized for ABI v1.
+ */
+public class ABIv1CallArranger extends CallArranger {
+
+    @Override
+    protected boolean useABIv2() {
+        return false;
+    }
+
+    @Override
+    protected boolean isAIX() {
+        return false;
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/foreign/abi/ppc64/linux/ABIv2CallArranger.class b/tests/test_data/std/jdk/internal/foreign/abi/ppc64/linux/ABIv2CallArranger.class
new file mode 100644
index 0000000000000000000000000000000000000000..a3b3d9ab1c6d489b943da33642421dc7547a9bbb
GIT binary patch
literal 518
zcmbV|&q@O^5XQgkzt*){t>E2*pj8Y=DS{%@1))&9C`G(w+gMZAY{~8xAIgg-!GjOr
zLy41Bq*_5RhwsZw<~K9s_3iluK!mjr4%`a78hiu{JLBOkS2~wQi-cdNMyiqKB367d
z8MIqG5=qiAM(B|=48f7oDnDj$x3>EgR2kZT@QKpJJ@1@!r~BVqc~Lr)4E3JU@~pUv
zrMVDsLYYP{9f+hajI!}((#vmD#&FR4-?&4DYLUrujdJ-b247{J?j=Kbo)%^xPn8|M
zKDX)KSWE>rP@#Xb#|5DXNEayL<c!>JK7l>b#X(4FpFz+fY3-wce2F3t%cxVv!n@?Q
d&hZ|s&XAikr1M3t%#-d<viS?iuv+$SyaTC`W>^3K

literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/foreign/abi/ppc64/linux/ABIv2CallArranger.java b/tests/test_data/std/jdk/internal/foreign/abi/ppc64/linux/ABIv2CallArranger.java
new file mode 100644
index 00000000..82cbaa0d
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/foreign/abi/ppc64/linux/ABIv2CallArranger.java
@@ -0,0 +1,44 @@
+/*
+ * Copyright (c) 2021, 2023, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2023 SAP SE. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package jdk.internal.foreign.abi.ppc64.linux;
+
+import jdk.internal.foreign.abi.ppc64.CallArranger;
+
+/**
+ * PPC64 CallArranger specialized for ABI v2.
+ */
+public class ABIv2CallArranger extends CallArranger {
+
+    @Override
+    protected boolean useABIv2() {
+        return true;
+    }
+
+    @Override
+    protected boolean isAIX() {
+        return false;
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/foreign/abi/ppc64/linux/LinuxPPC64Linker$1Holder.class b/tests/test_data/std/jdk/internal/foreign/abi/ppc64/linux/LinuxPPC64Linker$1Holder.class
new file mode 100644
index 0000000000000000000000000000000000000000..82921a8020b9c208b8da67a7a6942e043739466e
GIT binary patch
literal 740
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k!!Z;Le-tHH7$Yo&aZHf5=%gkw(?x8|l6L5Qj`SSzpH|bg5C8xG

literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/foreign/abi/ppc64/linux/LinuxPPC64Linker.class b/tests/test_data/std/jdk/internal/foreign/abi/ppc64/linux/LinuxPPC64Linker.class
new file mode 100644
index 0000000000000000000000000000000000000000..0217787315d16f8dc886d7d91109340ae9c30eda
GIT binary patch
literal 2417
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z!g#)6_oi{W=61b?ELsY>tBk1c>R3_{khO~J_~eox6GXk_IMOTFW~U>$O@_CNh7t*l
z&2`wkV8Z{KAsWi6UC!t7Sye@9y4RqLBJ5NRRe{^XK4Dk#8mYD@vCKI&&f8YtnwnIU
z%iN9N3nY=k3RZdYfG0O7)sr}d_=QqnjsMBubcOo74tts_luCDO?hk0caxoI9rYXTy
z0$<`GS4y2q+$AX!>SpR0_>Q{-&(f#3JioB`JKj?cLo1=fd|+WN)aqHFJ|5w#z-k&f
z<O6?cJjOaksmbdk&i;oN?He)nzmBypINZLWM+Maq{ixgs)%A;(i;>(F5-Rr)aDy~F
zIS27RV^+`9DLxN=_x{BEZ@8}T456P0H0DXt0wyufU4idLuz^j=1hqy`<mwjJ3i+p)
U!WMlzOQ!Igr`wbj%AI8DKLr$x)c^nh

literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/foreign/abi/ppc64/linux/LinuxPPC64Linker.java b/tests/test_data/std/jdk/internal/foreign/abi/ppc64/linux/LinuxPPC64Linker.java
new file mode 100644
index 00000000..a9f5bb4d
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/foreign/abi/ppc64/linux/LinuxPPC64Linker.java
@@ -0,0 +1,72 @@
+/*
+ * Copyright (c) 2022, 2024, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2023 SAP SE. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package jdk.internal.foreign.abi.ppc64.linux;
+
+import jdk.internal.foreign.abi.AbstractLinker;
+import jdk.internal.foreign.abi.LinkerOptions;
+import jdk.internal.foreign.abi.SharedUtils;
+import jdk.internal.foreign.abi.ppc64.CallArranger;
+
+import java.lang.foreign.FunctionDescriptor;
+import java.lang.foreign.MemoryLayout;
+import java.lang.foreign.ValueLayout;
+import java.lang.invoke.MethodHandle;
+import java.lang.invoke.MethodType;
+import java.nio.ByteOrder;
+import java.util.Map;
+
+public final class LinuxPPC64Linker extends AbstractLinker {
+
+    static final Map<String, MemoryLayout> CANONICAL_LAYOUTS =
+        SharedUtils.canonicalLayouts(ValueLayout.JAVA_LONG, ValueLayout.JAVA_LONG, ValueLayout.JAVA_INT);
+
+    public static LinuxPPC64Linker getInstance() {
+        final class Holder {
+            private static final LinuxPPC64Linker INSTANCE = new LinuxPPC64Linker();
+        }
+
+        return Holder.INSTANCE;
+    }
+
+    private LinuxPPC64Linker() {
+        // Ensure there is only one instance
+    }
+
+    @Override
+    protected MethodHandle arrangeDowncall(MethodType inferredMethodType, FunctionDescriptor function, LinkerOptions options) {
+        return CallArranger.ABIv1.arrangeDowncall(inferredMethodType, function, options);
+    }
+
+    @Override
+    protected UpcallStubFactory arrangeUpcall(MethodType targetType, FunctionDescriptor function, LinkerOptions options) {
+        return CallArranger.ABIv1.arrangeUpcall(targetType, function, options);
+    }
+
+    @Override
+    public Map<String, MemoryLayout> canonicalLayouts() {
+        return CANONICAL_LAYOUTS;
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/foreign/abi/ppc64/linux/LinuxPPC64leLinker$1Holder.class b/tests/test_data/std/jdk/internal/foreign/abi/ppc64/linux/LinuxPPC64leLinker$1Holder.class
new file mode 100644
index 0000000000000000000000000000000000000000..b02686818dcea8477e72178ec232d614fddebc57
GIT binary patch
literal 752
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l37(~3_@gMp!8l<VOkk3<L&r6R*)HN@j<iSb3#8{!`UDa{x&i<I

literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/foreign/abi/ppc64/linux/LinuxPPC64leLinker.class b/tests/test_data/std/jdk/internal/foreign/abi/ppc64/linux/LinuxPPC64leLinker.class
new file mode 100644
index 0000000000000000000000000000000000000000..063b9a58eaf0f63ba99b1ed85d4b3fc45a06445b
GIT binary patch
literal 2427
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/foreign/abi/ppc64/linux/LinuxPPC64leLinker.java b/tests/test_data/std/jdk/internal/foreign/abi/ppc64/linux/LinuxPPC64leLinker.java
new file mode 100644
index 00000000..e8305669
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/foreign/abi/ppc64/linux/LinuxPPC64leLinker.java
@@ -0,0 +1,72 @@
+/*
+ * Copyright (c) 2022, 2024, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2023 SAP SE. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package jdk.internal.foreign.abi.ppc64.linux;
+
+import jdk.internal.foreign.abi.AbstractLinker;
+import jdk.internal.foreign.abi.LinkerOptions;
+import jdk.internal.foreign.abi.SharedUtils;
+import jdk.internal.foreign.abi.ppc64.CallArranger;
+
+import java.lang.foreign.FunctionDescriptor;
+import java.lang.foreign.MemoryLayout;
+import java.lang.foreign.ValueLayout;
+import java.lang.invoke.MethodHandle;
+import java.lang.invoke.MethodType;
+import java.nio.ByteOrder;
+import java.util.Map;
+
+public final class LinuxPPC64leLinker extends AbstractLinker {
+
+    static final Map<String, MemoryLayout> CANONICAL_LAYOUTS =
+            SharedUtils.canonicalLayouts(ValueLayout.JAVA_LONG, ValueLayout.JAVA_LONG, ValueLayout.JAVA_INT);
+
+    public static LinuxPPC64leLinker getInstance() {
+        final class Holder {
+            private static final LinuxPPC64leLinker INSTANCE = new LinuxPPC64leLinker();
+        }
+
+        return Holder.INSTANCE;
+    }
+
+    private LinuxPPC64leLinker() {
+        // Ensure there is only one instance
+    }
+
+    @Override
+    protected MethodHandle arrangeDowncall(MethodType inferredMethodType, FunctionDescriptor function, LinkerOptions options) {
+        return CallArranger.ABIv2.arrangeDowncall(inferredMethodType, function, options);
+    }
+
+    @Override
+    protected UpcallStubFactory arrangeUpcall(MethodType targetType, FunctionDescriptor function, LinkerOptions options) {
+        return CallArranger.ABIv2.arrangeUpcall(targetType, function, options);
+    }
+
+    @Override
+    public Map<String, MemoryLayout> canonicalLayouts() {
+        return CANONICAL_LAYOUTS;
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/foreign/abi/riscv64/RISCV64Architecture$Regs.class b/tests/test_data/std/jdk/internal/foreign/abi/riscv64/RISCV64Architecture$Regs.class
new file mode 100644
index 0000000000000000000000000000000000000000..b2f4bffc20ec7c18b0481ff8721173e511662c63
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HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/foreign/abi/riscv64/RISCV64Architecture$StorageType.class b/tests/test_data/std/jdk/internal/foreign/abi/riscv64/RISCV64Architecture$StorageType.class
new file mode 100644
index 0000000000000000000000000000000000000000..439f677bd86f3440e5b49f1296d23118f38b30bf
GIT binary patch
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/foreign/abi/riscv64/RISCV64Architecture.class b/tests/test_data/std/jdk/internal/foreign/abi/riscv64/RISCV64Architecture.class
new file mode 100644
index 0000000000000000000000000000000000000000..22b6f2f44e631459db3800ae87c1ce280fcf9db4
GIT binary patch
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/foreign/abi/riscv64/RISCV64Architecture.java b/tests/test_data/std/jdk/internal/foreign/abi/riscv64/RISCV64Architecture.java
new file mode 100644
index 00000000..409b685b
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/foreign/abi/riscv64/RISCV64Architecture.java
@@ -0,0 +1,180 @@
+/*
+ * Copyright (c) 2020, 2023, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2023, Institute of Software, Chinese Academy of Sciences.
+ * All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ *
+ */
+
+package jdk.internal.foreign.abi.riscv64;
+
+import jdk.internal.foreign.abi.ABIDescriptor;
+import jdk.internal.foreign.abi.Architecture;
+import jdk.internal.foreign.abi.StubLocations;
+import jdk.internal.foreign.abi.VMStorage;
+
+public final class RISCV64Architecture implements Architecture {
+    public static final Architecture INSTANCE = new RISCV64Architecture();
+
+    private static final short REG64_MASK = 0b0000_0000_0000_0001;
+    private static final short FP_MASK = 0b0000_0000_0000_0001;
+
+    private static final int INTEGER_REG_SIZE = 8; // bytes
+    private static final int FLOAT_REG_SIZE = 8;
+
+    // Suppresses default constructor, ensuring non-instantiability.
+    private RISCV64Architecture() {}
+
+    @Override
+    public boolean isStackType(int cls) {
+        return cls == StorageType.STACK;
+    }
+
+    @Override
+    public int typeSize(int cls) {
+        return switch (cls) {
+            case StorageType.INTEGER -> INTEGER_REG_SIZE;
+            case StorageType.FLOAT   -> FLOAT_REG_SIZE;
+            // STACK is deliberately omitted
+            default -> throw new IllegalArgumentException("Invalid Storage Class: " + cls);
+        };
+    }
+
+    public interface StorageType {
+        byte INTEGER = 0;
+        byte FLOAT = 1;
+        byte STACK = 2;
+        byte PLACEHOLDER = 3;
+    }
+
+    public static class Regs { // break circular dependency
+        public static final VMStorage x0 = integerRegister(0, "zr");
+        public static final VMStorage x1 = integerRegister(1, "ra");
+        public static final VMStorage x2 = integerRegister(2, "sp");
+        public static final VMStorage x3 = integerRegister(3, "gp");
+        public static final VMStorage x4 = integerRegister(4, "tp");
+        public static final VMStorage x5 = integerRegister(5, "t0");
+        public static final VMStorage x6 = integerRegister(6, "t1");
+        public static final VMStorage x7 = integerRegister(7, "t2");
+        public static final VMStorage x8 = integerRegister(8, "s0/fp");
+        public static final VMStorage x9 = integerRegister(9, "s1");
+        public static final VMStorage x10 = integerRegister(10, "a0");
+        public static final VMStorage x11 = integerRegister(11, "a1");
+        public static final VMStorage x12 = integerRegister(12, "a2");
+        public static final VMStorage x13 = integerRegister(13, "a3");
+        public static final VMStorage x14 = integerRegister(14, "a4");
+        public static final VMStorage x15 = integerRegister(15, "a5");
+        public static final VMStorage x16 = integerRegister(16, "a6");
+        public static final VMStorage x17 = integerRegister(17, "a7");
+        public static final VMStorage x18 = integerRegister(18, "s2");
+        public static final VMStorage x19 = integerRegister(19, "s3");
+        public static final VMStorage x20 = integerRegister(20, "s4");
+        public static final VMStorage x21 = integerRegister(21, "s5");
+        public static final VMStorage x22 = integerRegister(22, "s6");
+        public static final VMStorage x23 = integerRegister(23, "s7");
+        public static final VMStorage x24 = integerRegister(24, "s8");
+        public static final VMStorage x25 = integerRegister(25, "s9");
+        public static final VMStorage x26 = integerRegister(26, "s10");
+        public static final VMStorage x27 = integerRegister(27, "s11");
+        public static final VMStorage x28 = integerRegister(28, "t3");
+        public static final VMStorage x29 = integerRegister(29, "t4");
+        public static final VMStorage x30 = integerRegister(30, "t5");
+        public static final VMStorage x31 = integerRegister(31, "t6");
+
+        public static final VMStorage f0 = floatRegister(0, "ft0");
+        public static final VMStorage f1 = floatRegister(1, "ft1");
+        public static final VMStorage f2 = floatRegister(2, "ft2");
+        public static final VMStorage f3 = floatRegister(3, "ft3");
+        public static final VMStorage f4 = floatRegister(4, "ft4");
+        public static final VMStorage f5 = floatRegister(5, "ft5");
+        public static final VMStorage f6 = floatRegister(6, "ft6");
+        public static final VMStorage f7 = floatRegister(7, "ft7");
+        public static final VMStorage f8 = floatRegister(8, "fs0");
+        public static final VMStorage f9 = floatRegister(9, "fs1");
+        public static final VMStorage f10 = floatRegister(10, "fa0");
+        public static final VMStorage f11 = floatRegister(11, "fa1");
+        public static final VMStorage f12 = floatRegister(12, "fa2");
+        public static final VMStorage f13 = floatRegister(13, "fa3");
+        public static final VMStorage f14 = floatRegister(14, "fa4");
+        public static final VMStorage f15 = floatRegister(15, "fa5");
+        public static final VMStorage f16 = floatRegister(16, "fa6");
+        public static final VMStorage f17 = floatRegister(17, "fa7");
+        public static final VMStorage f18 = floatRegister(18, "fs2");
+        public static final VMStorage f19 = floatRegister(19, "fs3");
+        public static final VMStorage f20 = floatRegister(20, "fs4");
+        public static final VMStorage f21 = floatRegister(21, "fs5");
+        public static final VMStorage f22 = floatRegister(22, "fs6");
+        public static final VMStorage f23 = floatRegister(23, "fs7");
+        public static final VMStorage f24 = floatRegister(24, "fs8");
+        public static final VMStorage f25 = floatRegister(25, "fs9");
+        public static final VMStorage f26 = floatRegister(26, "fs10");
+        public static final VMStorage f27 = floatRegister(27, "fs11");
+        public static final VMStorage f28 = floatRegister(28, "ft8");
+        public static final VMStorage f29 = floatRegister(29, "ft9");
+        public static final VMStorage f30 = floatRegister(30, "ft10");
+        public static final VMStorage f31 = floatRegister(31, "ft11");
+    }
+
+    private static VMStorage integerRegister(int index, String debugName) {
+        return new VMStorage(StorageType.INTEGER, REG64_MASK, index, debugName);
+    }
+
+    private static VMStorage floatRegister(int index, String debugName) {
+        return new VMStorage(StorageType.FLOAT, FP_MASK, index, debugName);
+    }
+
+    public static VMStorage stackStorage(short size, int byteOffset) {
+        return new VMStorage(StorageType.STACK, size, byteOffset);
+    }
+
+    public static ABIDescriptor abiFor(VMStorage[] inputIntRegs,
+                                       VMStorage[] inputFloatRegs,
+                                       VMStorage[] outputIntRegs,
+                                       VMStorage[] outputFloatRegs,
+                                       VMStorage[] volatileIntRegs,
+                                       VMStorage[] volatileFloatRegs,
+                                       int stackAlignment,
+                                       int shadowSpace,
+                                       VMStorage scratch1, VMStorage scratch2) {
+        return new ABIDescriptor(
+            INSTANCE,
+            new VMStorage[][]{
+                inputIntRegs,
+                inputFloatRegs,
+            },
+            new VMStorage[][]{
+                outputIntRegs,
+                outputFloatRegs,
+            },
+            new VMStorage[][]{
+                volatileIntRegs,
+                volatileFloatRegs,
+            },
+            stackAlignment,
+            shadowSpace,
+            scratch1, scratch2,
+            StubLocations.TARGET_ADDRESS.storage(StorageType.PLACEHOLDER),
+            StubLocations.RETURN_BUFFER.storage(StorageType.PLACEHOLDER),
+            StubLocations.CAPTURED_STATE_BUFFER.storage(StorageType.PLACEHOLDER));
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/foreign/abi/riscv64/linux/LinuxRISCV64CallArranger$1.class b/tests/test_data/std/jdk/internal/foreign/abi/riscv64/linux/LinuxRISCV64CallArranger$1.class
new file mode 100644
index 0000000000000000000000000000000000000000..50fab6b3a51af82a2e7e140d1170367a63289e43
GIT binary patch
literal 1161
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/foreign/abi/riscv64/linux/LinuxRISCV64CallArranger$BindingCalculator.class b/tests/test_data/std/jdk/internal/foreign/abi/riscv64/linux/LinuxRISCV64CallArranger$BindingCalculator.class
new file mode 100644
index 0000000000000000000000000000000000000000..c0ba6674cc15bb93e8c192eb4bf338e801aaaed1
GIT binary patch
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/foreign/abi/riscv64/linux/LinuxRISCV64CallArranger$Bindings.class b/tests/test_data/std/jdk/internal/foreign/abi/riscv64/linux/LinuxRISCV64CallArranger$Bindings.class
new file mode 100644
index 0000000000000000000000000000000000000000..0000435ed6c3c1f4f542f0ec97d2807462aac45e
GIT binary patch
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diff --git a/tests/test_data/std/jdk/internal/foreign/abi/riscv64/linux/LinuxRISCV64CallArranger$BoxBindingCalculator.class b/tests/test_data/std/jdk/internal/foreign/abi/riscv64/linux/LinuxRISCV64CallArranger$BoxBindingCalculator.class
new file mode 100644
index 0000000000000000000000000000000000000000..8653bfa478a8c54bb41a196bdc6f30cb2e27972c
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diff --git a/tests/test_data/std/jdk/internal/foreign/abi/riscv64/linux/LinuxRISCV64CallArranger$StorageCalculator.class b/tests/test_data/std/jdk/internal/foreign/abi/riscv64/linux/LinuxRISCV64CallArranger$StorageCalculator.class
new file mode 100644
index 0000000000000000000000000000000000000000..653dbd239e01fa8915d818b338c442c8912bde45
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diff --git a/tests/test_data/std/jdk/internal/foreign/abi/riscv64/linux/LinuxRISCV64CallArranger$UnboxBindingCalculator.class b/tests/test_data/std/jdk/internal/foreign/abi/riscv64/linux/LinuxRISCV64CallArranger$UnboxBindingCalculator.class
new file mode 100644
index 0000000000000000000000000000000000000000..13ca2c7cec38fad215e9b2625c9f74dd64cd6658
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/foreign/abi/riscv64/linux/LinuxRISCV64CallArranger.class b/tests/test_data/std/jdk/internal/foreign/abi/riscv64/linux/LinuxRISCV64CallArranger.class
new file mode 100644
index 0000000000000000000000000000000000000000..5a5996950f33e75c0d2062cb2fe5b4ad3e1057dd
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HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/foreign/abi/riscv64/linux/LinuxRISCV64CallArranger.java b/tests/test_data/std/jdk/internal/foreign/abi/riscv64/linux/LinuxRISCV64CallArranger.java
new file mode 100644
index 00000000..e8ac3305
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/foreign/abi/riscv64/linux/LinuxRISCV64CallArranger.java
@@ -0,0 +1,481 @@
+/*
+ * Copyright (c) 2020, 2023, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2023, Institute of Software, Chinese Academy of Sciences.
+ * All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ *
+ */
+
+package jdk.internal.foreign.abi.riscv64.linux;
+
+import java.lang.foreign.AddressLayout;
+import java.lang.foreign.FunctionDescriptor;
+import java.lang.foreign.GroupLayout;
+import java.lang.foreign.MemoryLayout;
+import java.lang.foreign.MemorySegment;
+import jdk.internal.foreign.abi.ABIDescriptor;
+import jdk.internal.foreign.abi.AbstractLinker.UpcallStubFactory;
+import jdk.internal.foreign.abi.Binding;
+import jdk.internal.foreign.abi.CallingSequence;
+import jdk.internal.foreign.abi.CallingSequenceBuilder;
+import jdk.internal.foreign.abi.DowncallLinker;
+import jdk.internal.foreign.abi.LinkerOptions;
+import jdk.internal.foreign.abi.SharedUtils;
+import jdk.internal.foreign.abi.VMStorage;
+import jdk.internal.foreign.Utils;
+
+import java.lang.invoke.MethodHandle;
+import java.lang.invoke.MethodType;
+import java.util.List;
+import java.util.Map;
+import java.util.Optional;
+
+import static jdk.internal.foreign.abi.riscv64.linux.TypeClass.*;
+import static jdk.internal.foreign.abi.riscv64.RISCV64Architecture.*;
+import static jdk.internal.foreign.abi.riscv64.RISCV64Architecture.Regs.*;
+
+/**
+ * For the RISCV64 C ABI specifically, this class uses CallingSequenceBuilder
+ * to translate a C FunctionDescriptor into a CallingSequence, which can then be turned into a MethodHandle.
+ *
+ * This includes taking care of synthetic arguments like pointers to return buffers for 'in-memory' returns.
+ */
+public class LinuxRISCV64CallArranger {
+    private static final int STACK_SLOT_SIZE = 8;
+    public static final int MAX_REGISTER_ARGUMENTS = 8;
+    private static final ABIDescriptor CLinux = abiFor(
+            new VMStorage[]{x10, x11, x12, x13, x14, x15, x16, x17},
+            new VMStorage[]{f10, f11, f12, f13, f14, f15, f16, f17},
+            new VMStorage[]{x10, x11},
+            new VMStorage[]{f10, f11},
+            new VMStorage[]{x5, x6, x7, x28, x29, x30, x31},
+            new VMStorage[]{f0, f1, f2, f3, f4, f5, f6, f7, f28, f29, f30, f31},
+            16, // stackAlignment
+            0,  // no shadow space
+            x28, x29 // scratch 1 & 2
+    );
+
+    public record Bindings(CallingSequence callingSequence,
+                           boolean isInMemoryReturn) {
+    }
+
+    public static Bindings getBindings(MethodType mt, FunctionDescriptor cDesc, boolean forUpcall) {
+        return getBindings(mt, cDesc, forUpcall, LinkerOptions.empty());
+    }
+
+    public static Bindings getBindings(MethodType mt, FunctionDescriptor cDesc, boolean forUpcall, LinkerOptions options) {
+        CallingSequenceBuilder csb = new CallingSequenceBuilder(CLinux, forUpcall, options);
+        BindingCalculator argCalc = forUpcall ? new BoxBindingCalculator(true) : new UnboxBindingCalculator(true, options.allowsHeapAccess());
+        BindingCalculator retCalc = forUpcall ? new UnboxBindingCalculator(false, false) : new BoxBindingCalculator(false);
+
+        boolean returnInMemory = isInMemoryReturn(cDesc.returnLayout());
+        if (returnInMemory) {
+            Class<?> carrier = MemorySegment.class;
+            MemoryLayout layout = SharedUtils.C_POINTER;
+            csb.addArgumentBindings(carrier, layout, argCalc.getBindings(carrier, layout, false));
+        } else if (cDesc.returnLayout().isPresent()) {
+            Class<?> carrier = mt.returnType();
+            MemoryLayout layout = cDesc.returnLayout().get();
+            csb.setReturnBindings(carrier, layout, retCalc.getBindings(carrier, layout, false));
+        }
+
+        for (int i = 0; i < mt.parameterCount(); i++) {
+            Class<?> carrier = mt.parameterType(i);
+            MemoryLayout layout = cDesc.argumentLayouts().get(i);
+            boolean isVar = options.isVarargsIndex(i);
+            csb.addArgumentBindings(carrier, layout, argCalc.getBindings(carrier, layout, isVar));
+        }
+
+        return new Bindings(csb.build(), returnInMemory);
+    }
+
+    public static MethodHandle arrangeDowncall(MethodType mt, FunctionDescriptor cDesc, LinkerOptions options) {
+        Bindings bindings = getBindings(mt, cDesc, false, options);
+
+        MethodHandle handle = new DowncallLinker(CLinux, bindings.callingSequence).getBoundMethodHandle();
+
+        if (bindings.isInMemoryReturn) {
+            handle = SharedUtils.adaptDowncallForIMR(handle, cDesc, bindings.callingSequence);
+        }
+
+        return handle;
+    }
+
+    public static UpcallStubFactory arrangeUpcall(MethodType mt, FunctionDescriptor cDesc, LinkerOptions options) {
+        Bindings bindings = getBindings(mt, cDesc, true, options);
+        final boolean dropReturn = true; /* drop return, since we don't have bindings for it */
+        return SharedUtils.arrangeUpcallHelper(mt, bindings.isInMemoryReturn, dropReturn, CLinux,
+                bindings.callingSequence);
+    }
+
+    private static boolean isInMemoryReturn(Optional<MemoryLayout> returnLayout) {
+        return returnLayout
+                .filter(GroupLayout.class::isInstance)
+                .filter(g -> TypeClass.classifyLayout(g) == TypeClass.STRUCT_REFERENCE)
+                .isPresent();
+    }
+
+    static class StorageCalculator {
+        private final boolean forArguments;
+        // next available register index. 0=integerRegIdx, 1=floatRegIdx
+        private final int IntegerRegIdx = 0;
+        private final int FloatRegIdx = 1;
+        private final int[] nRegs = {0, 0};
+
+        private long stackOffset = 0;
+
+        public StorageCalculator(boolean forArguments) {
+            this.forArguments = forArguments;
+        }
+
+        // Aggregates or scalars passed on the stack are aligned to the greatest of
+        // the type alignment and XLEN bits, but never more than the stack alignment.
+        void alignStack(long alignment) {
+            alignment = Utils.alignUp(Math.clamp(alignment, STACK_SLOT_SIZE, 16), STACK_SLOT_SIZE);
+            stackOffset = Utils.alignUp(stackOffset, alignment);
+        }
+
+        VMStorage stackAlloc() {
+            assert forArguments : "no stack returns";
+            VMStorage storage = stackStorage((short) STACK_SLOT_SIZE, (int) stackOffset);
+            stackOffset += STACK_SLOT_SIZE;
+            return storage;
+        }
+
+        Optional<VMStorage> regAlloc(int storageClass) {
+            if (nRegs[storageClass] < MAX_REGISTER_ARGUMENTS) {
+                VMStorage[] source = (forArguments ? CLinux.inputStorage : CLinux.outputStorage)[storageClass];
+                Optional<VMStorage> result = Optional.of(source[nRegs[storageClass]]);
+                nRegs[storageClass] += 1;
+                return result;
+            }
+            return Optional.empty();
+        }
+
+        VMStorage getStorage(int storageClass) {
+            Optional<VMStorage> storage = regAlloc(storageClass);
+            if (storage.isPresent()) {
+                return storage.get();
+            }
+            // If storageClass is StorageType.FLOAT, and no floating-point register is available,
+            // try to allocate an integer register.
+            if (storageClass == StorageType.FLOAT) {
+                storage = regAlloc(StorageType.INTEGER);
+                if (storage.isPresent()) {
+                    return storage.get();
+                }
+            }
+            return stackAlloc();
+        }
+
+        VMStorage[] getStorages(MemoryLayout layout, boolean isVariadicArg) {
+            int regCnt = (int) SharedUtils.alignUp(layout.byteSize(), 8) / 8;
+            if (isVariadicArg && layout.byteAlignment() == 16 && layout.byteSize() <= 16) {
+                alignStorage();
+                // Two registers or stack slots will be allocated, even layout.byteSize <= 8B.
+                regCnt = 2;
+            }
+            VMStorage[] storages = new VMStorage[regCnt];
+            for (int i = 0; i < regCnt; i++) {
+                // use integer calling convention.
+                storages[i] = getStorage(StorageType.INTEGER);
+            }
+            return storages;
+        }
+
+        boolean regsAvailable(int integerRegs, int floatRegs) {
+            return nRegs[IntegerRegIdx] + integerRegs <= MAX_REGISTER_ARGUMENTS &&
+                   nRegs[FloatRegIdx] + floatRegs <= MAX_REGISTER_ARGUMENTS;
+        }
+
+        // Variadic arguments with 2 * XLEN-bit alignment and size at most 2 * XLEN bits
+        // are passed in an aligned register pair (i.e., the first register in the pair
+        // is even-numbered), or on the stack by value if none is available.
+        // After a variadic argument has been passed on the stack, all future arguments
+        // will also be passed on the stack.
+        void alignStorage() {
+            if (nRegs[IntegerRegIdx] + 2 <= MAX_REGISTER_ARGUMENTS) {
+                nRegs[IntegerRegIdx] = (nRegs[IntegerRegIdx] + 1) & -2;
+            } else {
+                nRegs[IntegerRegIdx] = MAX_REGISTER_ARGUMENTS;
+                stackOffset = Utils.alignUp(stackOffset, 16);
+            }
+        }
+
+        @Override
+        public String toString() {
+            String nReg = "iReg: " + nRegs[IntegerRegIdx] + ", fReg: " + nRegs[FloatRegIdx];
+            String stack = ", stackOffset: " + stackOffset;
+            return "{" + nReg + stack + "}";
+        }
+    }
+
+    abstract static class BindingCalculator {
+        protected final StorageCalculator storageCalculator;
+
+        @Override
+        public String toString() {
+            return storageCalculator.toString();
+        }
+
+        protected BindingCalculator(boolean forArguments) {
+            this.storageCalculator = new LinuxRISCV64CallArranger.StorageCalculator(forArguments);
+        }
+
+        abstract List<Binding> getBindings(Class<?> carrier, MemoryLayout layout, boolean isVariadicArg);
+
+        // When handling variadic part, integer calling convention should be used.
+        static final Map<TypeClass, TypeClass> conventionConverterMap =
+                Map.ofEntries(Map.entry(FLOAT, INTEGER),
+                              Map.entry(STRUCT_REGISTER_F, STRUCT_REGISTER_X),
+                              Map.entry(STRUCT_REGISTER_XF, STRUCT_REGISTER_X));
+    }
+
+    static final class UnboxBindingCalculator extends BindingCalculator {
+        protected final boolean forArguments;
+        private final boolean useAddressPairs;
+
+        UnboxBindingCalculator(boolean forArguments, boolean useAddressPairs) {
+            super(forArguments);
+            this.forArguments = forArguments;
+            this.useAddressPairs = useAddressPairs;
+        }
+
+        @Override
+        List<Binding> getBindings(Class<?> carrier, MemoryLayout layout, boolean isVariadicArg) {
+            TypeClass typeClass = TypeClass.classifyLayout(layout);
+            if (isVariadicArg) {
+                typeClass = BindingCalculator.conventionConverterMap.getOrDefault(typeClass, typeClass);
+            }
+            return getBindings(carrier, layout, typeClass, isVariadicArg);
+        }
+
+        List<Binding> getBindings(Class<?> carrier, MemoryLayout layout, TypeClass argumentClass, boolean isVariadicArg) {
+            Binding.Builder bindings = Binding.builder();
+            switch (argumentClass) {
+                case INTEGER -> {
+                    VMStorage storage = storageCalculator.getStorage(StorageType.INTEGER);
+                    bindings.vmStore(storage, carrier);
+                }
+                case FLOAT -> {
+                    VMStorage storage = storageCalculator.getStorage(StorageType.FLOAT);
+                    bindings.vmStore(storage, carrier);
+                }
+                case POINTER -> {
+                    VMStorage storage = storageCalculator.getStorage(StorageType.INTEGER);
+                    if (useAddressPairs) {
+                        bindings.dup()
+                                .segmentBase()
+                                .vmStore(storage, Object.class)
+                                .segmentOffsetAllowHeap()
+                                .vmStore(null, long.class);
+                    } else {
+                        bindings.unboxAddress();
+                        bindings.vmStore(storage, long.class);
+                    }
+                }
+                case STRUCT_REGISTER_X -> {
+                    assert carrier == MemorySegment.class;
+
+                    // When no register is available, struct will be passed by stack.
+                    // Before allocation, stack must be aligned.
+                    if (!storageCalculator.regsAvailable(1, 0)) {
+                        storageCalculator.alignStack(layout.byteAlignment());
+                    }
+                    VMStorage[] locations = storageCalculator.getStorages(layout, isVariadicArg);
+                    int locIndex = 0;
+                    long offset = 0;
+                    while (offset < layout.byteSize()) {
+                        final long copy = Math.min(layout.byteSize() - offset, 8);
+                        VMStorage storage = locations[locIndex++];
+                        Class<?> type = SharedUtils.primitiveCarrierForSize(copy, false);
+                        if (offset + copy < layout.byteSize()) {
+                            bindings.dup();
+                        }
+                        bindings.bufferLoad(offset, type, (int) copy)
+                                .vmStore(storage, type);
+                        offset += copy;
+                    }
+                }
+                case STRUCT_REGISTER_F -> {
+                    assert carrier == MemorySegment.class;
+                    List<FlattenedFieldDesc> descs = getFlattenedFields((GroupLayout) layout);
+                    if (storageCalculator.regsAvailable(0, descs.size())) {
+                        for (int i = 0; i < descs.size(); i++) {
+                            FlattenedFieldDesc desc = descs.get(i);
+                            Class<?> type = desc.layout().carrier();
+                            VMStorage storage = storageCalculator.getStorage(StorageType.FLOAT);
+                            if (i < descs.size() - 1) {
+                                bindings.dup();
+                            }
+                            bindings.bufferLoad(desc.offset(), type)
+                                    .vmStore(storage, type);
+                        }
+                    } else {
+                        // If there is not enough register can be used, then fall back to integer calling convention.
+                        return getBindings(carrier, layout, STRUCT_REGISTER_X, isVariadicArg);
+                    }
+                }
+                case STRUCT_REGISTER_XF -> {
+                    assert carrier == MemorySegment.class;
+                    if (storageCalculator.regsAvailable(1, 1)) {
+                        List<FlattenedFieldDesc> descs = getFlattenedFields((GroupLayout) layout);
+                        for (int i = 0; i < 2; i++) {
+                            FlattenedFieldDesc desc = descs.get(i);
+                            int storageClass;
+                            if (desc.typeClass() == INTEGER) {
+                                storageClass = StorageType.INTEGER;
+                            } else {
+                                storageClass = StorageType.FLOAT;
+                            }
+                            VMStorage storage = storageCalculator.getStorage(storageClass);
+                            Class<?> type = desc.layout().carrier();
+                            if (i < 1) {
+                                bindings.dup();
+                            }
+                            bindings.bufferLoad(desc.offset(), type)
+                                    .vmStore(storage, type);
+                        }
+                    } else {
+                        return getBindings(carrier, layout, STRUCT_REGISTER_X, isVariadicArg);
+                    }
+                }
+                case STRUCT_REFERENCE -> {
+                    assert carrier == MemorySegment.class;
+                    bindings.copy(layout)
+                            .unboxAddress();
+                    VMStorage storage = storageCalculator.getStorage(StorageType.INTEGER);
+                    bindings.vmStore(storage, long.class);
+                }
+                default -> throw new UnsupportedOperationException("Unhandled class " + argumentClass);
+            }
+
+            return bindings.build();
+        }
+    }
+
+    static class BoxBindingCalculator extends BindingCalculator {
+
+        BoxBindingCalculator(boolean forArguments) {
+            super(forArguments);
+        }
+
+        @Override
+        List<Binding> getBindings(Class<?> carrier, MemoryLayout layout, boolean isVariadicArg) {
+            TypeClass typeClass = TypeClass.classifyLayout(layout);
+            if (isVariadicArg) {
+                typeClass = BindingCalculator.conventionConverterMap.getOrDefault(typeClass, typeClass);
+            }
+            return getBindings(carrier, layout, typeClass, isVariadicArg);
+        }
+
+        List<Binding> getBindings(Class<?> carrier, MemoryLayout layout, TypeClass argumentClass, boolean isVariadicArg) {
+            Binding.Builder bindings = Binding.builder();
+            switch (argumentClass) {
+                case INTEGER -> {
+                    VMStorage storage = storageCalculator.getStorage(StorageType.INTEGER);
+                    bindings.vmLoad(storage, carrier);
+                }
+                case FLOAT -> {
+                    VMStorage storage = storageCalculator.getStorage(StorageType.FLOAT);
+                    bindings.vmLoad(storage, carrier);
+                }
+                case POINTER -> {
+                    AddressLayout addressLayout = (AddressLayout) layout;
+                    VMStorage storage = storageCalculator.getStorage(StorageType.INTEGER);
+                    bindings.vmLoad(storage, long.class)
+                            .boxAddressRaw(Utils.pointeeByteSize(addressLayout), Utils.pointeeByteAlign(addressLayout));
+                }
+                case STRUCT_REGISTER_X -> {
+                    assert carrier == MemorySegment.class;
+
+                    // When no register is available, struct will be passed by stack.
+                    // Before allocation, stack must be aligned.
+                    if (!storageCalculator.regsAvailable(1, 0)) {
+                        storageCalculator.alignStack(layout.byteAlignment());
+                    }
+                    bindings.allocate(layout);
+                    VMStorage[] locations = storageCalculator.getStorages(layout, isVariadicArg);
+                    int locIndex = 0;
+                    long offset = 0;
+                    while (offset < layout.byteSize()) {
+                        final long copy = Math.min(layout.byteSize() - offset, 8);
+                        VMStorage storage = locations[locIndex++];
+                        Class<?> type = SharedUtils.primitiveCarrierForSize(copy, false);
+                        bindings.dup().vmLoad(storage, type)
+                                .bufferStore(offset, type, (int) copy);
+                        offset += copy;
+                    }
+                }
+                case STRUCT_REGISTER_F -> {
+                    assert carrier == MemorySegment.class;
+                    bindings.allocate(layout);
+                    List<FlattenedFieldDesc> descs = getFlattenedFields((GroupLayout) layout);
+                    if (storageCalculator.regsAvailable(0, descs.size())) {
+                        for (FlattenedFieldDesc desc : descs) {
+                            Class<?> type = desc.layout().carrier();
+                            VMStorage storage = storageCalculator.getStorage(StorageType.FLOAT);
+                            bindings.dup()
+                                    .vmLoad(storage, type)
+                                    .bufferStore(desc.offset(), type);
+                        }
+                    } else {
+                        return getBindings(carrier, layout, STRUCT_REGISTER_X, isVariadicArg);
+                    }
+                }
+                case STRUCT_REGISTER_XF -> {
+                    assert carrier == MemorySegment.class;
+                    bindings.allocate(layout);
+                    if (storageCalculator.regsAvailable(1, 1)) {
+                        List<FlattenedFieldDesc> descs = getFlattenedFields((GroupLayout) layout);
+                        for (int i = 0; i < 2; i++) {
+                            FlattenedFieldDesc desc = descs.get(i);
+                            int storageClass;
+                            if (desc.typeClass() == INTEGER) {
+                                storageClass = StorageType.INTEGER;
+                            } else {
+                                storageClass = StorageType.FLOAT;
+                            }
+                            VMStorage storage = storageCalculator.getStorage(storageClass);
+                            Class<?> type = desc.layout().carrier();
+                            bindings.dup()
+                                    .vmLoad(storage, type)
+                                    .bufferStore(desc.offset(), type);
+                        }
+                    } else {
+                        return getBindings(carrier, layout, STRUCT_REGISTER_X, isVariadicArg);
+                    }
+                }
+                case STRUCT_REFERENCE -> {
+                    assert carrier == MemorySegment.class;
+                    VMStorage storage = storageCalculator.getStorage(StorageType.INTEGER);
+                    bindings.vmLoad(storage, long.class)
+                            .boxAddress(layout);
+                }
+                default -> throw new UnsupportedOperationException("Unhandled class " + argumentClass);
+            }
+
+            return bindings.build();
+        }
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/foreign/abi/riscv64/linux/LinuxRISCV64Linker$1Holder.class b/tests/test_data/std/jdk/internal/foreign/abi/riscv64/linux/LinuxRISCV64Linker$1Holder.class
new file mode 100644
index 0000000000000000000000000000000000000000..4c32592290ada272c91947be0c9a67e5257dcb1f
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diff --git a/tests/test_data/std/jdk/internal/foreign/abi/riscv64/linux/LinuxRISCV64Linker.class b/tests/test_data/std/jdk/internal/foreign/abi/riscv64/linux/LinuxRISCV64Linker.class
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diff --git a/tests/test_data/std/jdk/internal/foreign/abi/riscv64/linux/LinuxRISCV64Linker.java b/tests/test_data/std/jdk/internal/foreign/abi/riscv64/linux/LinuxRISCV64Linker.java
new file mode 100644
index 00000000..706fdacf
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/foreign/abi/riscv64/linux/LinuxRISCV64Linker.java
@@ -0,0 +1,74 @@
+/*
+ * Copyright (c) 2020, 2024, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2023, Institute of Software, Chinese Academy of Sciences.
+ * All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ *
+ */
+
+package jdk.internal.foreign.abi.riscv64.linux;
+
+import jdk.internal.foreign.abi.AbstractLinker;
+import jdk.internal.foreign.abi.LinkerOptions;
+import jdk.internal.foreign.abi.SharedUtils;
+
+import java.lang.foreign.FunctionDescriptor;
+import java.lang.foreign.MemoryLayout;
+import java.lang.foreign.ValueLayout;
+import java.lang.invoke.MethodHandle;
+import java.lang.invoke.MethodType;
+import java.nio.ByteOrder;
+import java.util.Map;
+
+public final class LinuxRISCV64Linker extends AbstractLinker {
+
+    static final Map<String, MemoryLayout> CANONICAL_LAYOUTS =
+            SharedUtils.canonicalLayouts(ValueLayout.JAVA_LONG, ValueLayout.JAVA_LONG, ValueLayout.JAVA_INT);
+
+    public static LinuxRISCV64Linker getInstance() {
+        final class Holder {
+            private static final LinuxRISCV64Linker INSTANCE = new LinuxRISCV64Linker();
+        }
+
+        return Holder.INSTANCE;
+    }
+
+    private LinuxRISCV64Linker() {
+        // Ensure there is only one instance
+    }
+
+    @Override
+    protected MethodHandle arrangeDowncall(MethodType inferredMethodType, FunctionDescriptor function, LinkerOptions options) {
+        return LinuxRISCV64CallArranger.arrangeDowncall(inferredMethodType, function, options);
+    }
+
+    @Override
+    protected UpcallStubFactory arrangeUpcall(MethodType targetType, FunctionDescriptor function, LinkerOptions options) {
+        return LinuxRISCV64CallArranger.arrangeUpcall(targetType, function, options);
+    }
+
+    @Override
+    public Map<String, MemoryLayout> canonicalLayouts() {
+        return CANONICAL_LAYOUTS;
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/foreign/abi/riscv64/linux/TypeClass$FieldCounter.class b/tests/test_data/std/jdk/internal/foreign/abi/riscv64/linux/TypeClass$FieldCounter.class
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/foreign/abi/riscv64/linux/TypeClass$FlattenedFieldDesc.class b/tests/test_data/std/jdk/internal/foreign/abi/riscv64/linux/TypeClass$FlattenedFieldDesc.class
new file mode 100644
index 0000000000000000000000000000000000000000..8fbdc333a2c82ae283bf4c901d4c5dcc9de6ff4b
GIT binary patch
literal 2175
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/foreign/abi/riscv64/linux/TypeClass.class b/tests/test_data/std/jdk/internal/foreign/abi/riscv64/linux/TypeClass.class
new file mode 100644
index 0000000000000000000000000000000000000000..d32172d112f353b79ab863f358a35f0c461c83d2
GIT binary patch
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/foreign/abi/riscv64/linux/TypeClass.java b/tests/test_data/std/jdk/internal/foreign/abi/riscv64/linux/TypeClass.java
new file mode 100644
index 00000000..e00771d2
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/foreign/abi/riscv64/linux/TypeClass.java
@@ -0,0 +1,221 @@
+/*
+ * Copyright (c) 2020, 2023, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2023, Institute of Software, Chinese Academy of Sciences.
+ * All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ *
+ */
+
+package jdk.internal.foreign.abi.riscv64.linux;
+
+import java.lang.foreign.GroupLayout;
+import java.lang.foreign.MemoryLayout;
+import java.lang.foreign.MemorySegment;
+import java.lang.foreign.PaddingLayout;
+import java.lang.foreign.SequenceLayout;
+import java.lang.foreign.UnionLayout;
+import java.lang.foreign.ValueLayout;
+import java.util.ArrayList;
+import java.util.List;
+
+public enum TypeClass {
+    /*
+     * STRUCT_REFERENCE: Aggregates larger than 2 * XLEN bits are passed by reference and are replaced
+     *     in the argument list with the address. The address will be passed in a register if at least
+     *     one register is available, otherwise it will be passed on the stack.
+     *
+     * STRUCT_REGISTER_F: A struct containing just one floating-point real is passed as though it were
+     *     a standalone floating-point real. A struct containing two floating-point reals is passed in two
+     *     floating-point registers, if neither real is more than ABI_FLEN bits wide and at least two
+     *     floating-point argument registers are available. (The registers need not be an aligned pair.)
+     *     Otherwise, it is passed according to the integer calling convention.
+     *
+     * STRUCT_REGISTER_XF: A struct containing one floating-point real and one integer (or bitfield), in either
+     *     order, is passed in a floating-point register and an integer register, provided the floating-point real
+     *     is no more than ABI_FLEN bits wide and the integer is no more than XLEN bits wide, and at least one
+     *     floating-point argument register and at least one integer argument register is available. If the struct
+     *     is not passed in this manner, then it is passed according to the integer calling convention.
+     *
+     * STRUCT_REGISTER_X: Aggregates whose total size is no more than XLEN bits are passed in a register, with the
+     *     fields laid out as though they were passed in memory. If no register is available, the aggregate is
+     *     passed on the stack. Aggregates whose total size is no more than 2 * XLEN bits are passed in a pair of
+     *     registers; if only one register is available, the first XLEN bits are passed in a register and the
+     *     remaining bits are passed on the stack. If no registers are available, the aggregate is passed on the stack.
+     *
+     * See https://github.com/riscv-non-isa/riscv-elf-psabi-doc/blob/master/riscv-cc.adoc
+     * */
+    INTEGER,
+    FLOAT,
+    POINTER,
+    STRUCT_REFERENCE,
+    STRUCT_REGISTER_F,
+    STRUCT_REGISTER_XF,
+    STRUCT_REGISTER_X;
+
+    private static final int MAX_AGGREGATE_REGS_SIZE = 2;
+
+    /*
+     * Struct will be flattened while classifying. That is, struct{struct{int, double}} will be treated
+     * same as struct{int, double} and struct{int[2]} will be treated same as struct{int, int}.
+     * */
+    private record FieldCounter(long integerCnt, long floatCnt, long pointerCnt) {
+        static final FieldCounter EMPTY = new FieldCounter(0, 0, 0);
+        static final FieldCounter SINGLE_INTEGER = new FieldCounter(1, 0, 0);
+        static final FieldCounter SINGLE_FLOAT = new FieldCounter(0, 1, 0);
+        static final FieldCounter SINGLE_POINTER = new FieldCounter(0, 0, 1);
+
+        static FieldCounter flatten(MemoryLayout layout) {
+            switch (layout) {
+                case ValueLayout valueLayout -> {
+                    return switch (classifyValueType(valueLayout)) {
+                        case INTEGER -> FieldCounter.SINGLE_INTEGER;
+                        case FLOAT   -> FieldCounter.SINGLE_FLOAT;
+                        case POINTER -> FieldCounter.SINGLE_POINTER;
+                        default -> throw new IllegalStateException("Should not reach here.");
+                    };
+                }
+                case GroupLayout groupLayout -> {
+                    FieldCounter currCounter = FieldCounter.EMPTY;
+                    for (MemoryLayout memberLayout : groupLayout.memberLayouts()) {
+                        if (memberLayout instanceof PaddingLayout) {
+                            continue;
+                        }
+                        currCounter = currCounter.add(flatten(memberLayout));
+                    }
+                    return currCounter;
+                }
+                case SequenceLayout sequenceLayout -> {
+                    long elementCount = sequenceLayout.elementCount();
+                    if (elementCount == 0) {
+                        return FieldCounter.EMPTY;
+                    }
+                    return flatten(sequenceLayout.elementLayout()).mul(elementCount);
+                }
+                default -> throw new IllegalStateException("Cannot get here: " + layout);
+            }
+        }
+
+        FieldCounter mul(long m) {
+            return new FieldCounter(integerCnt * m,
+                                    floatCnt * m,
+                                    pointerCnt * m);
+        }
+
+        FieldCounter add(FieldCounter other) {
+            return new FieldCounter(integerCnt + other.integerCnt,
+                                    floatCnt + other.floatCnt,
+                                    pointerCnt + other.pointerCnt);
+        }
+    }
+
+    public record FlattenedFieldDesc(TypeClass typeClass, long offset, ValueLayout layout) { }
+
+    private static List<FlattenedFieldDesc> getFlattenedFieldsInner(long offset, MemoryLayout layout) {
+        return switch (layout) {
+            case ValueLayout valueLayout -> {
+                TypeClass typeClass = classifyValueType(valueLayout);
+                yield List.of(switch (typeClass) {
+                    case INTEGER, FLOAT -> new FlattenedFieldDesc(typeClass, offset, valueLayout);
+                    default -> throw new IllegalStateException("Should not reach here.");
+                });
+            }
+            case GroupLayout groupLayout -> {
+                List<FlattenedFieldDesc> fields = new ArrayList<>();
+                for (MemoryLayout memberLayout : groupLayout.memberLayouts()) {
+                    if (memberLayout instanceof PaddingLayout) {
+                        offset += memberLayout.byteSize();
+                        continue;
+                    }
+                    fields.addAll(getFlattenedFieldsInner(offset, memberLayout));
+                    offset += memberLayout.byteSize();
+                }
+                yield fields;
+            }
+            case SequenceLayout sequenceLayout -> {
+                List<FlattenedFieldDesc> fields = new ArrayList<>();
+                MemoryLayout elementLayout = sequenceLayout.elementLayout();
+                for (long i = 0; i < sequenceLayout.elementCount(); i++) {
+                    fields.addAll(getFlattenedFieldsInner(offset, elementLayout));
+                    offset += elementLayout.byteSize();
+                }
+                yield fields;
+            }
+            case null, default -> throw new IllegalStateException("Cannot get here: " + layout);
+        };
+    }
+
+    public static List<FlattenedFieldDesc> getFlattenedFields(GroupLayout layout) {
+        return getFlattenedFieldsInner(0, layout);
+    }
+
+    // ValueLayout will be classified by its carrier type.
+    private static TypeClass classifyValueType(ValueLayout type) {
+        Class<?> carrier = type.carrier();
+        if (carrier == boolean.class || carrier == byte.class || carrier == char.class ||
+            carrier == short.class || carrier == int.class || carrier == long.class) {
+            return INTEGER;
+        } else if (carrier == float.class || carrier == double.class) {
+            return FLOAT;
+        } else if (carrier == MemorySegment.class) {
+            return POINTER;
+        } else {
+            throw new IllegalStateException("Cannot get here: " + carrier.getName());
+        }
+    }
+
+    private static boolean isRegisterAggregate(MemoryLayout type) {
+        return type.byteSize() <= MAX_AGGREGATE_REGS_SIZE * 8;
+    }
+
+    private static TypeClass classifyStructType(GroupLayout layout) {
+        if (layout instanceof UnionLayout) {
+            return isRegisterAggregate(layout) ? STRUCT_REGISTER_X : STRUCT_REFERENCE;
+        }
+
+        if (!isRegisterAggregate(layout)) {
+            return STRUCT_REFERENCE;
+        }
+
+        // classify struct by its fields.
+        FieldCounter counter = FieldCounter.flatten(layout);
+        if (counter.integerCnt == 0 && counter.pointerCnt == 0 &&
+            (counter.floatCnt == 1 || counter.floatCnt == 2)) {
+            return STRUCT_REGISTER_F;
+        } else if (counter.integerCnt == 1 && counter.floatCnt == 1 &&
+                   counter.pointerCnt == 0) {
+            return STRUCT_REGISTER_XF;
+        } else {
+            return STRUCT_REGISTER_X;
+        }
+    }
+
+    public static TypeClass classifyLayout(MemoryLayout type) {
+        if (type instanceof ValueLayout vt) {
+            return classifyValueType(vt);
+        } else if (type instanceof GroupLayout gt) {
+            return classifyStructType(gt);
+        } else {
+            throw new IllegalArgumentException("Unsupported layout: " + type);
+        }
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/foreign/abi/s390/S390Architecture$Regs.class b/tests/test_data/std/jdk/internal/foreign/abi/s390/S390Architecture$Regs.class
new file mode 100644
index 0000000000000000000000000000000000000000..25a477b2eacdf41974e5e2b84dae38026f4a5c29
GIT binary patch
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HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/foreign/abi/s390/S390Architecture$StorageType.class b/tests/test_data/std/jdk/internal/foreign/abi/s390/S390Architecture$StorageType.class
new file mode 100644
index 0000000000000000000000000000000000000000..79a70fe023460d9dd6e0ad7ee3ea5e2aa75a3dff
GIT binary patch
literal 415
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/foreign/abi/s390/S390Architecture.class b/tests/test_data/std/jdk/internal/foreign/abi/s390/S390Architecture.class
new file mode 100644
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GIT binary patch
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HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/foreign/abi/s390/S390Architecture.java b/tests/test_data/std/jdk/internal/foreign/abi/s390/S390Architecture.java
new file mode 100644
index 00000000..146536f0
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/foreign/abi/s390/S390Architecture.java
@@ -0,0 +1,148 @@
+/*
+ * Copyright (c) 2020, 2023, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2023 IBM Corp. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package jdk.internal.foreign.abi.s390;
+
+import jdk.internal.foreign.abi.ABIDescriptor;
+import jdk.internal.foreign.abi.Architecture;
+import jdk.internal.foreign.abi.StubLocations;
+import jdk.internal.foreign.abi.VMStorage;
+
+public final class S390Architecture implements Architecture {
+    public static final Architecture INSTANCE = new S390Architecture();
+
+    // Needs to be consistent with vmstorage_s390.hpp.
+    public static final short REG32_MASK = 0b0000_0000_0000_0001;
+    public static final short REG64_MASK = 0b0000_0000_0000_0011;
+
+    private static final int INTEGER_REG_SIZE = 8;
+    private static final int FLOAT_REG_SIZE = 8;
+    private static final int STACK_SLOT_SIZE = 8;
+
+    // Suppresses default constructor, ensuring non-instantiability.
+    private S390Architecture() {
+    }
+
+    @Override
+    public boolean isStackType(int cls) {
+        return cls == StorageType.STACK;
+    }
+
+    @Override
+    public int typeSize(int cls) {
+        return switch (cls) {
+            case StorageType.INTEGER -> INTEGER_REG_SIZE;
+            case StorageType.FLOAT   -> FLOAT_REG_SIZE;
+                // STACK is deliberately omitted
+            default -> throw new IllegalArgumentException("Invalid Storage Class: " + cls);
+        };
+    }
+
+    public interface StorageType {
+        byte INTEGER = 0;
+        byte FLOAT = 1;
+        byte STACK = 2;
+        byte PLACEHOLDER = 3;
+    }
+
+    public static class Regs { // break circular dependency
+        public static final VMStorage r0 = integerRegister(0);
+        public static final VMStorage r1 = integerRegister(1);
+        public static final VMStorage r2 = integerRegister(2);
+        public static final VMStorage r3 = integerRegister(3);
+        public static final VMStorage r4 = integerRegister(4);
+        public static final VMStorage r5 = integerRegister(5);
+        public static final VMStorage r6 = integerRegister(6);
+        public static final VMStorage r7 = integerRegister(7);
+        public static final VMStorage r8 = integerRegister(8);
+        public static final VMStorage r9 = integerRegister(9);
+        public static final VMStorage r10 = integerRegister(10);
+        public static final VMStorage r11 = integerRegister(11);
+        public static final VMStorage r12 = integerRegister(12);
+        public static final VMStorage r13 = integerRegister(13);
+        public static final VMStorage r14 = integerRegister(14);
+        public static final VMStorage r15 = integerRegister(15);
+
+        public static final VMStorage f0 = floatRegister(0);
+        public static final VMStorage f1 = floatRegister(1);
+        public static final VMStorage f2 = floatRegister(2);
+        public static final VMStorage f3 = floatRegister(3);
+        public static final VMStorage f4 = floatRegister(4);
+        public static final VMStorage f5 = floatRegister(5);
+        public static final VMStorage f6 = floatRegister(6);
+        public static final VMStorage f7 = floatRegister(7);
+        public static final VMStorage f8 = floatRegister(8);
+        public static final VMStorage f9 = floatRegister(9);
+        public static final VMStorage f10 = floatRegister(10);
+        public static final VMStorage f11 = floatRegister(11);
+        public static final VMStorage f12 = floatRegister(12);
+        public static final VMStorage f13 = floatRegister(13);
+        public static final VMStorage f14 = floatRegister(14);
+        public static final VMStorage f15 = floatRegister(15);
+    }
+
+    private static VMStorage integerRegister(int index) {
+        return new VMStorage(StorageType.INTEGER, REG64_MASK, index, "r" + index);
+    }
+
+    private static VMStorage floatRegister(int index) {
+        return new VMStorage(StorageType.FLOAT, REG64_MASK, index, "f" + index);
+    }
+
+    public static VMStorage stackStorage(short size, int byteOffset) {
+        return new VMStorage(StorageType.STACK, size, byteOffset);
+    }
+
+    public static ABIDescriptor abiFor(VMStorage[] inputIntRegs,
+                                       VMStorage[] inputFloatRegs,
+                                       VMStorage[] outputIntRegs,
+                                       VMStorage[] outputFloatRegs,
+                                       VMStorage[] volatileIntRegs,
+                                       VMStorage[] volatileFloatRegs,
+                                       int stackAlignment,
+                                       int shadowSpace,
+                                       VMStorage scratch1, VMStorage scratch2) {
+        return new ABIDescriptor(
+            INSTANCE,
+            new VMStorage[][] {
+                inputIntRegs,
+                inputFloatRegs,
+            },
+            new VMStorage[][] {
+                outputIntRegs,
+                outputFloatRegs,
+            },
+            new VMStorage[][] {
+                volatileIntRegs,
+                volatileFloatRegs,
+            },
+            stackAlignment,
+            shadowSpace,
+            scratch1, scratch2,
+            StubLocations.TARGET_ADDRESS.storage(StorageType.PLACEHOLDER),
+            StubLocations.RETURN_BUFFER.storage(StorageType.PLACEHOLDER),
+            StubLocations.CAPTURED_STATE_BUFFER.storage(StorageType.PLACEHOLDER));
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/foreign/abi/s390/linux/LinuxS390CallArranger$1.class b/tests/test_data/std/jdk/internal/foreign/abi/s390/linux/LinuxS390CallArranger$1.class
new file mode 100644
index 0000000000000000000000000000000000000000..ce1df3f8c4134388c43b6532ae45e0879a489fb7
GIT binary patch
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/foreign/abi/s390/linux/LinuxS390CallArranger$BindingCalculator.class b/tests/test_data/std/jdk/internal/foreign/abi/s390/linux/LinuxS390CallArranger$BindingCalculator.class
new file mode 100644
index 0000000000000000000000000000000000000000..8bca04a7895b1fe9a380c5d5f139673c0976e565
GIT binary patch
literal 1043
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diff --git a/tests/test_data/std/jdk/internal/foreign/abi/s390/linux/LinuxS390CallArranger$Bindings.class b/tests/test_data/std/jdk/internal/foreign/abi/s390/linux/LinuxS390CallArranger$Bindings.class
new file mode 100644
index 0000000000000000000000000000000000000000..a7ce8538a796032cf3b599f27eef32f63efeac01
GIT binary patch
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diff --git a/tests/test_data/std/jdk/internal/foreign/abi/s390/linux/LinuxS390CallArranger$BoxBindingCalculator.class b/tests/test_data/std/jdk/internal/foreign/abi/s390/linux/LinuxS390CallArranger$BoxBindingCalculator.class
new file mode 100644
index 0000000000000000000000000000000000000000..1f4a4c40d30ad9fa288f1876974c35d14e9b0d01
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diff --git a/tests/test_data/std/jdk/internal/foreign/abi/s390/linux/LinuxS390CallArranger$StorageCalculator.class b/tests/test_data/std/jdk/internal/foreign/abi/s390/linux/LinuxS390CallArranger$StorageCalculator.class
new file mode 100644
index 0000000000000000000000000000000000000000..5324b0ec1c47437b36bb82050bd90030411e3d8c
GIT binary patch
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diff --git a/tests/test_data/std/jdk/internal/foreign/abi/s390/linux/LinuxS390CallArranger$UnboxBindingCalculator.class b/tests/test_data/std/jdk/internal/foreign/abi/s390/linux/LinuxS390CallArranger$UnboxBindingCalculator.class
new file mode 100644
index 0000000000000000000000000000000000000000..664f79c362ee12277b5723d4094d421bfe5ecfea
GIT binary patch
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diff --git a/tests/test_data/std/jdk/internal/foreign/abi/s390/linux/LinuxS390CallArranger.class b/tests/test_data/std/jdk/internal/foreign/abi/s390/linux/LinuxS390CallArranger.class
new file mode 100644
index 0000000000000000000000000000000000000000..5692b92b8796a92197fe53557849fee129587f90
GIT binary patch
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diff --git a/tests/test_data/std/jdk/internal/foreign/abi/s390/linux/LinuxS390CallArranger.java b/tests/test_data/std/jdk/internal/foreign/abi/s390/linux/LinuxS390CallArranger.java
new file mode 100644
index 00000000..7e6c2540
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/foreign/abi/s390/linux/LinuxS390CallArranger.java
@@ -0,0 +1,318 @@
+/*
+ * Copyright (c) 2022, 2023, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2023 IBM Corp. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package jdk.internal.foreign.abi.s390.linux;
+
+import java.lang.foreign.AddressLayout;
+import java.lang.foreign.FunctionDescriptor;
+import java.lang.foreign.GroupLayout;
+import java.lang.foreign.MemoryLayout;
+import java.lang.foreign.MemorySegment;
+import jdk.internal.foreign.abi.ABIDescriptor;
+import jdk.internal.foreign.abi.AbstractLinker.UpcallStubFactory;
+import jdk.internal.foreign.abi.Binding;
+import jdk.internal.foreign.abi.CallingSequence;
+import jdk.internal.foreign.abi.CallingSequenceBuilder;
+import jdk.internal.foreign.abi.DowncallLinker;
+import jdk.internal.foreign.abi.LinkerOptions;
+import jdk.internal.foreign.abi.SharedUtils;
+import jdk.internal.foreign.abi.VMStorage;
+import jdk.internal.foreign.Utils;
+
+import java.lang.invoke.MethodHandle;
+import java.lang.invoke.MethodType;
+import java.util.List;
+import java.util.Optional;
+
+import static jdk.internal.foreign.abi.s390.S390Architecture.*;
+import static jdk.internal.foreign.abi.s390.S390Architecture.Regs.*;
+
+/**
+ * For the S390 C ABI specifically, this class uses CallingSequenceBuilder
+ * to translate a C FunctionDescriptor into a CallingSequence, which can then be turned into a MethodHandle.
+ *
+ * This includes taking care of synthetic arguments like pointers to return buffers for 'in-memory' returns.
+ */
+public class LinuxS390CallArranger {
+
+    private static final int STACK_SLOT_SIZE = 8;
+    public static final int MAX_REGISTER_ARGUMENTS = 5;
+    public static final int MAX_FLOAT_REGISTER_ARGUMENTS = 4;
+
+    private static final ABIDescriptor CLinux = abiFor(
+            new VMStorage[] { r2, r3, r4, r5, r6, }, // GP input
+            new VMStorage[] { f0, f2, f4, f6 }, // FP input
+            new VMStorage[] { r2, }, // GP output
+            new VMStorage[] { f0, }, // FP output
+            new VMStorage[] { r0, r1, r2, r3, r4, r5, r14 }, // volatile GP
+            new VMStorage[] { f1, f3, f5, f7 }, // volatile FP (excluding argument registers)
+            8, // Stack is always 8 byte aligned on S390
+            160, // ABI header
+            r0, r1 // scratch reg r0 & r1
+            );
+
+    public record Bindings(CallingSequence callingSequence, boolean isInMemoryReturn) {}
+
+    public static Bindings getBindings(MethodType mt, FunctionDescriptor cDesc, boolean forUpcall) {
+        return getBindings(mt, cDesc, forUpcall, LinkerOptions.empty());
+    }
+
+    public static Bindings getBindings(MethodType mt, FunctionDescriptor cDesc, boolean forUpcall, LinkerOptions options) {
+        CallingSequenceBuilder csb = new CallingSequenceBuilder(CLinux, forUpcall, options);
+
+        BindingCalculator argCalc = forUpcall ? new BoxBindingCalculator(true) : new UnboxBindingCalculator(true, options.allowsHeapAccess());
+        BindingCalculator retCalc = forUpcall ? new UnboxBindingCalculator(false, false) : new BoxBindingCalculator(false);
+
+        boolean returnInMemory = isInMemoryReturn(cDesc.returnLayout());
+        if (returnInMemory) {
+            Class<?> carrier = MemorySegment.class;
+            MemoryLayout layout =SharedUtils.C_POINTER;
+            csb.addArgumentBindings(carrier, layout, argCalc.getBindings(carrier, layout));
+        } else if (cDesc.returnLayout().isPresent()) {
+            Class<?> carrier = mt.returnType();
+            MemoryLayout layout = cDesc.returnLayout().get();
+            csb.setReturnBindings(carrier, layout, retCalc.getBindings(carrier, layout));
+        }
+
+        for (int i = 0; i < mt.parameterCount(); i++) {
+            Class<?> carrier = mt.parameterType(i);
+            MemoryLayout layout = cDesc.argumentLayouts().get(i);
+            csb.addArgumentBindings(carrier, layout, argCalc.getBindings(carrier, layout));
+        }
+
+        return new Bindings(csb.build(), returnInMemory);
+    }
+
+    public static MethodHandle arrangeDowncall(MethodType mt, FunctionDescriptor cDesc, LinkerOptions options) {
+        Bindings bindings = getBindings(mt, cDesc, false, options);
+
+        MethodHandle handle = new DowncallLinker(CLinux, bindings.callingSequence).getBoundMethodHandle();
+
+        if (bindings.isInMemoryReturn) {
+            handle = SharedUtils.adaptDowncallForIMR(handle, cDesc, bindings.callingSequence);
+        }
+
+        return handle;
+    }
+
+    public static UpcallStubFactory arrangeUpcall(MethodType mt, FunctionDescriptor cDesc, LinkerOptions options) {
+        Bindings bindings = getBindings(mt, cDesc, true, options);
+
+        final boolean dropReturn = true; /* drop return, since we don't have bindings for it */
+        return SharedUtils.arrangeUpcallHelper(mt, bindings.isInMemoryReturn, dropReturn, CLinux,
+                bindings.callingSequence);
+    }
+
+    private static boolean isInMemoryReturn(Optional<MemoryLayout> returnLayout) {
+        return returnLayout
+            .filter(layout -> layout instanceof GroupLayout)
+            .isPresent();
+    }
+
+    static class StorageCalculator {
+        private final boolean forArguments;
+
+        private final int[] nRegs = new int[] { 0, 0 };
+        private long stackOffset = 0;
+
+        public StorageCalculator(boolean forArguments) {
+            this.forArguments = forArguments;
+        }
+
+        VMStorage stackAlloc(long size, long alignment) {
+            long alignedStackOffset = Utils.alignUp(stackOffset, alignment);
+
+            short encodedSize = (short) size;
+            assert (encodedSize & 0xFFFF) == size;
+
+            VMStorage storage = stackStorage(encodedSize, (int) alignedStackOffset);
+            stackOffset = alignedStackOffset + size;
+            return storage;
+        }
+
+        VMStorage regAlloc(int type) {
+            int gpRegCnt = (type == StorageType.INTEGER) ? 1 : 0;
+            int fpRegCnt = (type == StorageType.FLOAT) ? 1 : 0;
+
+            // Use stack if not enough registers available.
+            if ((type == StorageType.FLOAT && (nRegs[StorageType.FLOAT] + fpRegCnt) > MAX_FLOAT_REGISTER_ARGUMENTS)
+                    || (type == StorageType.INTEGER && (nRegs[StorageType.INTEGER] + gpRegCnt) > MAX_REGISTER_ARGUMENTS)) return null;
+
+            VMStorage[] source = (forArguments ? CLinux.inputStorage : CLinux.outputStorage)[type];
+            VMStorage result = source[nRegs[type]];
+
+            nRegs[StorageType.INTEGER] += gpRegCnt;
+            nRegs[StorageType.FLOAT] += fpRegCnt;
+            return result;
+
+        }
+        VMStorage getStorage(int type, boolean is32Bit) {
+            VMStorage reg = regAlloc(type);
+            if (reg != null) {
+                if (is32Bit) {
+                    reg = new VMStorage(reg.type(), REG32_MASK, reg.indexOrOffset());
+                }
+                return reg;
+            }
+            VMStorage stack;
+            if (is32Bit) {
+                stackAlloc(4, STACK_SLOT_SIZE); // Skip first half of stack slot.
+                stack = stackAlloc(4, 4);
+            } else
+                stack = stackAlloc(8, STACK_SLOT_SIZE);
+
+            return stack;
+        }
+    }
+
+    abstract static class BindingCalculator {
+        protected final StorageCalculator storageCalculator;
+
+        protected BindingCalculator(boolean forArguments) {
+            this.storageCalculator = new LinuxS390CallArranger.StorageCalculator(forArguments);
+        }
+
+        abstract List<Binding> getBindings(Class<?> carrier, MemoryLayout layout);
+    }
+
+    // Compute recipe for transferring arguments / return values to C from Java.
+    static class UnboxBindingCalculator extends BindingCalculator {
+            private final boolean useAddressPairs;
+
+            UnboxBindingCalculator(boolean forArguments, boolean useAddressPairs) {
+            super(forArguments);
+            this.useAddressPairs = useAddressPairs;
+        }
+
+        @Override
+        List<Binding> getBindings(Class<?> carrier, MemoryLayout layout) {
+            TypeClass argumentClass = TypeClass.classifyLayout(layout);
+            Binding.Builder bindings = Binding.builder();
+            switch (argumentClass) {
+                case STRUCT_REGISTER -> {
+                    assert carrier == MemorySegment.class;
+                    VMStorage storage = storageCalculator.getStorage(StorageType.INTEGER, false);
+                    Class<?> type = SharedUtils.primitiveCarrierForSize(layout.byteSize(), false);
+                    bindings.bufferLoad(0, type)
+                            .vmStore(storage, type);
+                }
+                case STRUCT_SFA -> {
+                    assert carrier == MemorySegment.class;
+                    VMStorage storage = storageCalculator.getStorage(StorageType.FLOAT, layout.byteSize() == 4);
+                    Class<?> type = SharedUtils.primitiveCarrierForSize(layout.byteSize(), true);
+                    bindings.bufferLoad(0, type)
+                            .vmStore(storage, type);
+                }
+                case STRUCT_REFERENCE -> {
+                    assert carrier == MemorySegment.class;
+                    bindings.copy(layout)
+                            .unboxAddress();
+                    VMStorage storage = storageCalculator.getStorage(StorageType.INTEGER, false);
+                    bindings.vmStore(storage, long.class);
+                }
+                case POINTER -> {
+                    VMStorage storage = storageCalculator.getStorage(StorageType.INTEGER, false);
+                    if (useAddressPairs) {
+                        bindings.dup()
+                                .segmentBase()
+                                .vmStore(storage, Object.class)
+                                .segmentOffsetAllowHeap()
+                                .vmStore(null, long.class);
+                    } else {
+                        bindings.unboxAddress();
+                        bindings.vmStore(storage, long.class);
+                    }
+                }
+                case INTEGER -> {
+                    // ABI requires all int types to get extended to 64 bit.
+                    VMStorage storage = storageCalculator.getStorage(StorageType.INTEGER, false);
+                    bindings.vmStore(storage, carrier);
+                }
+                case FLOAT -> {
+                    VMStorage storage = storageCalculator.getStorage(StorageType.FLOAT, carrier == float.class);
+                    bindings.vmStore(storage, carrier);
+                }
+                default -> throw new UnsupportedOperationException("Unhandled class " + argumentClass);
+            }
+            return bindings.build();
+        }
+    }
+
+    // Compute recipe for transferring arguments / return values from C to Java.
+    static class BoxBindingCalculator extends BindingCalculator {
+        BoxBindingCalculator(boolean forArguments) {
+            super(forArguments);
+        }
+
+        @Override
+        List<Binding> getBindings(Class<?> carrier, MemoryLayout layout) {
+            TypeClass argumentClass = TypeClass.classifyLayout(layout);
+            Binding.Builder bindings = Binding.builder();
+            switch (argumentClass) {
+                case STRUCT_REGISTER -> {
+                    assert carrier == MemorySegment.class;
+                    bindings.allocate(layout)
+                            .dup();
+                    VMStorage storage = storageCalculator.getStorage(StorageType.INTEGER, false);
+                    Class<?> type = SharedUtils.primitiveCarrierForSize(layout.byteSize(), false);
+                    bindings.vmLoad(storage, type)
+                            .bufferStore(0, type);
+                }
+                case STRUCT_SFA -> {
+                    assert carrier == MemorySegment.class;
+                    bindings.allocate(layout)
+                            .dup();
+                    VMStorage storage = storageCalculator.getStorage(StorageType.FLOAT, layout.byteSize() == 4);
+                    Class<?> type = SharedUtils.primitiveCarrierForSize(layout.byteSize(), true);
+                    bindings.vmLoad(storage, type)
+                            .bufferStore(0, type);
+                }
+                case STRUCT_REFERENCE -> {
+                    assert carrier == MemorySegment.class;
+                    VMStorage storage = storageCalculator.getStorage(StorageType.INTEGER, false);
+                    bindings.vmLoad(storage, long.class)
+                            .boxAddress(layout);
+                }
+                case POINTER -> {
+                    AddressLayout addressLayout = (AddressLayout) layout;
+                    VMStorage storage = storageCalculator.getStorage(StorageType.INTEGER, false);
+                    bindings.vmLoad(storage, long.class)
+                            .boxAddressRaw(Utils.pointeeByteSize(addressLayout), Utils.pointeeByteAlign(addressLayout));
+                }
+                case INTEGER -> {
+                    // We could use carrier != long.class for BoxBindingCalculator, but C always uses 64 bit slots.
+                    VMStorage storage = storageCalculator.getStorage(StorageType.INTEGER, false);
+                    bindings.vmLoad(storage, carrier);
+                }
+                case FLOAT -> {
+                    VMStorage storage = storageCalculator.getStorage(StorageType.FLOAT, carrier == float.class);
+                    bindings.vmLoad(storage, carrier);
+                }
+                default -> throw new UnsupportedOperationException("Unhandled class " + argumentClass);
+            }
+            return bindings.build();
+        }
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/foreign/abi/s390/linux/LinuxS390Linker$1Holder.class b/tests/test_data/std/jdk/internal/foreign/abi/s390/linux/LinuxS390Linker$1Holder.class
new file mode 100644
index 0000000000000000000000000000000000000000..39128f8a244ee9b362b94b6ea24a1f354d070405
GIT binary patch
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/foreign/abi/s390/linux/LinuxS390Linker.class b/tests/test_data/std/jdk/internal/foreign/abi/s390/linux/LinuxS390Linker.class
new file mode 100644
index 0000000000000000000000000000000000000000..1ba9ff7e78df07bb31a0ddb8dd982cb7e1c37def
GIT binary patch
literal 2350
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/foreign/abi/s390/linux/LinuxS390Linker.java b/tests/test_data/std/jdk/internal/foreign/abi/s390/linux/LinuxS390Linker.java
new file mode 100644
index 00000000..9810fbf1
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/foreign/abi/s390/linux/LinuxS390Linker.java
@@ -0,0 +1,71 @@
+/*
+ * Copyright (c) 2022, 2024, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2023 IBM Corp. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package jdk.internal.foreign.abi.s390.linux;
+
+import jdk.internal.foreign.abi.AbstractLinker;
+import jdk.internal.foreign.abi.LinkerOptions;
+import jdk.internal.foreign.abi.SharedUtils;
+
+import java.lang.foreign.FunctionDescriptor;
+import java.lang.foreign.MemoryLayout;
+import java.lang.foreign.ValueLayout;
+import java.lang.invoke.MethodHandle;
+import java.lang.invoke.MethodType;
+import java.nio.ByteOrder;
+import java.util.Map;
+
+public final class LinuxS390Linker extends AbstractLinker {
+
+    private static final Map<String, MemoryLayout> CANONICAL_LAYOUTS =
+            SharedUtils.canonicalLayouts(ValueLayout.JAVA_LONG, ValueLayout.JAVA_LONG, ValueLayout.JAVA_INT);
+
+    public static LinuxS390Linker getInstance() {
+        final class Holder {
+            private static final LinuxS390Linker INSTANCE = new LinuxS390Linker();
+        }
+
+        return Holder.INSTANCE;
+    }
+
+    private LinuxS390Linker() {
+        // Ensure there is only one instance
+    }
+
+    @Override
+    protected MethodHandle arrangeDowncall(MethodType inferredMethodType, FunctionDescriptor function, LinkerOptions options) {
+        return LinuxS390CallArranger.arrangeDowncall(inferredMethodType, function, options);
+    }
+
+    @Override
+    protected UpcallStubFactory arrangeUpcall(MethodType targetType, FunctionDescriptor function, LinkerOptions options) {
+        return LinuxS390CallArranger.arrangeUpcall(targetType, function, options);
+    }
+
+    @Override
+    public Map<String, MemoryLayout> canonicalLayouts() {
+        return CANONICAL_LAYOUTS;
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/foreign/abi/s390/linux/TypeClass.class b/tests/test_data/std/jdk/internal/foreign/abi/s390/linux/TypeClass.class
new file mode 100644
index 0000000000000000000000000000000000000000..a8d0481970c2b248597fa7b5c5dce3ba1a98328d
GIT binary patch
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/foreign/abi/s390/linux/TypeClass.java b/tests/test_data/std/jdk/internal/foreign/abi/s390/linux/TypeClass.java
new file mode 100644
index 00000000..1f96fa4b
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/foreign/abi/s390/linux/TypeClass.java
@@ -0,0 +1,123 @@
+/*
+ * Copyright (c) 2022, 2023, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2023 IBM Corp. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package jdk.internal.foreign.abi.s390.linux;
+
+import java.lang.foreign.GroupLayout;
+import java.lang.foreign.MemoryLayout;
+import java.lang.foreign.MemorySegment;
+import java.lang.foreign.SequenceLayout;
+import java.lang.foreign.ValueLayout;
+import java.util.List;
+import java.util.ArrayList;
+
+public enum TypeClass {
+    STRUCT_REGISTER,
+    STRUCT_SFA, // Single Float Aggregate
+    STRUCT_REFERENCE,
+    POINTER,
+    INTEGER,
+    FLOAT;
+
+    private static TypeClass classifyValueType(ValueLayout type) {
+        Class<?> carrier = type.carrier();
+        if (carrier == boolean.class || carrier == byte.class || carrier == char.class ||
+                carrier == short.class || carrier == int.class || carrier == long.class) {
+            return INTEGER;
+        } else if (carrier == float.class || carrier == double.class) {
+            return FLOAT;
+        } else if (carrier == MemorySegment.class) {
+            return POINTER;
+        } else {
+            throw new IllegalStateException("Cannot get here: " + carrier.getName());
+        }
+    }
+
+    private static boolean isRegisterAggregate(MemoryLayout type) {
+        long byteSize = type.byteSize();
+        if (byteSize > 8 || byteSize == 3 || byteSize == 5 || byteSize == 6 || byteSize == 7)
+            return false;
+        return true;
+    }
+
+    static List<MemoryLayout> scalarLayouts(GroupLayout gl) {
+        List<MemoryLayout> out = new ArrayList<>();
+        scalarLayoutsInternal(out, gl);
+        return out;
+    }
+
+    private static void scalarLayoutsInternal(List<MemoryLayout> out, GroupLayout gl) {
+        for (MemoryLayout member : gl.memberLayouts()) {
+            if (member instanceof GroupLayout memberGl) {
+                scalarLayoutsInternal(out, memberGl);
+            } else if (member instanceof SequenceLayout memberSl) {
+                for (long i = 0; i < memberSl.elementCount(); i++) {
+                    out.add(memberSl.elementLayout());
+                }
+            } else {
+                // padding or value layouts
+                out.add(member);
+            }
+        }
+    }
+
+    static boolean isSingleFloatAggregate(MemoryLayout type) {
+        List<MemoryLayout> scalarLayouts = scalarLayouts((GroupLayout) type);
+
+        final int numElements = scalarLayouts.size();
+        if (numElements > 1 || numElements == 0)
+            return false;
+
+        MemoryLayout baseType = scalarLayouts.get(0);
+
+        if (!(baseType instanceof ValueLayout))
+            return false;
+
+        TypeClass baseArgClass = classifyValueType((ValueLayout) baseType);
+        return baseArgClass == FLOAT;
+    }
+
+    private static TypeClass classifyStructType(MemoryLayout layout) {
+
+        if (!isRegisterAggregate(layout)) {
+            return TypeClass.STRUCT_REFERENCE;
+        }
+
+        if (isSingleFloatAggregate(layout)) {
+            return TypeClass.STRUCT_SFA;
+        }
+        return TypeClass.STRUCT_REGISTER;
+    }
+
+    public static TypeClass classifyLayout(MemoryLayout type) {
+        if (type instanceof ValueLayout) {
+            return classifyValueType((ValueLayout) type);
+        } else if (type instanceof GroupLayout) {
+            return classifyStructType(type);
+        } else {
+            throw new IllegalArgumentException("Unsupported layout: " + type);
+        }
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/foreign/abi/x64/X86_64Architecture$Regs.class b/tests/test_data/std/jdk/internal/foreign/abi/x64/X86_64Architecture$Regs.class
new file mode 100644
index 0000000000000000000000000000000000000000..962f9e12582f3c8e48285173c0d3234a2478a55a
GIT binary patch
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/foreign/abi/x64/X86_64Architecture$StorageType.class b/tests/test_data/std/jdk/internal/foreign/abi/x64/X86_64Architecture$StorageType.class
new file mode 100644
index 0000000000000000000000000000000000000000..49cda54e4f0cd288b993c45a04474aa658d31022
GIT binary patch
literal 447
zcmb7<%}&BV6ot<fY57%D6y3XaHUvprVXa~$V4xxF%zz^no2i)&MqkZ^58y)?@33m(
z%Ejc)m)zX*o$sH|F8~3KeQXgfR*x?t)>auU6Y-Q96)&}r^H{uh+G5u2JapPUvv`iJ
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/foreign/abi/x64/X86_64Architecture.class b/tests/test_data/std/jdk/internal/foreign/abi/x64/X86_64Architecture.class
new file mode 100644
index 0000000000000000000000000000000000000000..644e4603bbefbf8f59bcdd07f8c2878af6443c88
GIT binary patch
literal 4931
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/foreign/abi/x64/X86_64Architecture.java b/tests/test_data/std/jdk/internal/foreign/abi/x64/X86_64Architecture.java
new file mode 100644
index 00000000..03fc39d0
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/foreign/abi/x64/X86_64Architecture.java
@@ -0,0 +1,176 @@
+/*
+ * Copyright (c) 2020, 2023, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package jdk.internal.foreign.abi.x64;
+
+import jdk.internal.foreign.abi.ABIDescriptor;
+import jdk.internal.foreign.abi.Architecture;
+import jdk.internal.foreign.abi.StubLocations;
+import jdk.internal.foreign.abi.VMStorage;
+
+import java.util.stream.IntStream;
+
+public final class X86_64Architecture implements Architecture {
+    public static final Architecture INSTANCE = new X86_64Architecture();
+
+    private static final short REG8_H_MASK = 0b0000_0000_0000_0010;
+    private static final short REG8_L_MASK = 0b0000_0000_0000_0001;
+    private static final short REG16_MASK = 0b0000_0000_0000_0011;
+    private static final short REG32_MASK = 0b0000_0000_0000_0111;
+    private static final short REG64_MASK = 0b0000_0000_0000_1111;
+    private static final short XMM_MASK = 0b0000_0000_0000_0001;
+    private static final short YMM_MASK = 0b0000_0000_0000_0011;
+    private static final short ZMM_MASK = 0b0000_0000_0000_0111;
+    private static final short STP_MASK = 0b0000_0000_0000_0001;
+
+    private static final int INTEGER_REG_SIZE = 8; // bytes
+    private static final int VECTOR_REG_SIZE = 16; // size of XMM register
+    private static final int X87_REG_SIZE = 16;
+
+    // Suppresses default constructor, ensuring non-instantiability.
+    private X86_64Architecture() {}
+
+    @Override
+    public boolean isStackType(int cls) {
+        return cls == StorageType.STACK;
+    }
+
+    @Override
+    public int typeSize(int cls) {
+        return switch (cls) {
+            case StorageType.INTEGER -> INTEGER_REG_SIZE;
+            case StorageType.VECTOR  -> VECTOR_REG_SIZE;
+            case StorageType.X87     -> X87_REG_SIZE;
+            // STACK is deliberately omitted
+            default -> throw new IllegalArgumentException("Invalid Storage Class: " +cls);
+        };
+    }
+
+    // must keep in sync with StorageType in VM code
+    public interface StorageType {
+        byte INTEGER = 0;
+        byte VECTOR = 1;
+        byte X87 = 2;
+        byte STACK = 3;
+        byte PLACEHOLDER = 4;
+    }
+
+    public static class Regs { // break circular dependency
+        public static final VMStorage rax = integerRegister(0, "rax");
+        public static final VMStorage rcx = integerRegister(1, "rcx");
+        public static final VMStorage rdx = integerRegister(2, "rdx");
+        public static final VMStorage rbx = integerRegister(3, "rbx");
+        public static final VMStorage rsp = integerRegister(4, "rsp");
+        public static final VMStorage rbp = integerRegister(5, "rbp");
+        public static final VMStorage rsi = integerRegister(6, "rsi");
+        public static final VMStorage rdi = integerRegister(7, "rdi");
+        public static final VMStorage r8 = integerRegister(8, "r8");
+        public static final VMStorage r9 = integerRegister(9, "r9");
+        public static final VMStorage r10 = integerRegister(10, "r10");
+        public static final VMStorage r11 = integerRegister(11, "r11");
+        public static final VMStorage r12 = integerRegister(12, "r12");
+        public static final VMStorage r13 = integerRegister(13, "r13");
+        public static final VMStorage r14 = integerRegister(14, "r14");
+        public static final VMStorage r15 = integerRegister(15, "r15");
+
+        public static final VMStorage xmm0 = vectorRegister(0, "xmm0");
+        public static final VMStorage xmm1 = vectorRegister(1, "xmm1");
+        public static final VMStorage xmm2 = vectorRegister(2, "xmm2");
+        public static final VMStorage xmm3 = vectorRegister(3, "xmm3");
+        public static final VMStorage xmm4 = vectorRegister(4, "xmm4");
+        public static final VMStorage xmm5 = vectorRegister(5, "xmm5");
+        public static final VMStorage xmm6 = vectorRegister(6, "xmm6");
+        public static final VMStorage xmm7 = vectorRegister(7, "xmm7");
+        public static final VMStorage xmm8 = vectorRegister(8, "xmm8");
+        public static final VMStorage xmm9 = vectorRegister(9, "xmm9");
+        public static final VMStorage xmm10 = vectorRegister(10, "xmm10");
+        public static final VMStorage xmm11 = vectorRegister(11, "xmm11");
+        public static final VMStorage xmm12 = vectorRegister(12, "xmm12");
+        public static final VMStorage xmm13 = vectorRegister(13, "xmm13");
+        public static final VMStorage xmm14 = vectorRegister(14, "xmm14");
+        public static final VMStorage xmm15 = vectorRegister(15, "xmm15");
+        public static final VMStorage xmm16 = vectorRegister(16, "xmm16");
+        public static final VMStorage xmm17 = vectorRegister(17, "xmm17");
+        public static final VMStorage xmm18 = vectorRegister(18, "xmm18");
+        public static final VMStorage xmm19 = vectorRegister(19, "xmm19");
+        public static final VMStorage xmm20 = vectorRegister(20, "xmm20");
+        public static final VMStorage xmm21 = vectorRegister(21, "xmm21");
+        public static final VMStorage xmm22 = vectorRegister(22, "xmm22");
+        public static final VMStorage xmm23 = vectorRegister(23, "xmm23");
+        public static final VMStorage xmm24 = vectorRegister(24, "xmm24");
+        public static final VMStorage xmm25 = vectorRegister(25, "xmm25");
+        public static final VMStorage xmm26 = vectorRegister(26, "xmm26");
+        public static final VMStorage xmm27 = vectorRegister(27, "xmm27");
+        public static final VMStorage xmm28 = vectorRegister(28, "xmm28");
+        public static final VMStorage xmm29 = vectorRegister(29, "xmm29");
+        public static final VMStorage xmm30 = vectorRegister(30, "xmm30");
+        public static final VMStorage xmm31 = vectorRegister(31, "xmm31");
+    }
+
+    private static VMStorage integerRegister(int index, String debugName) {
+        return new VMStorage(StorageType.INTEGER, REG64_MASK, index, debugName);
+    }
+
+    private static VMStorage vectorRegister(int index, String debugName) {
+        return new VMStorage(StorageType.VECTOR, XMM_MASK, index, debugName);
+    }
+
+    public static VMStorage stackStorage(short size, int byteOffset) {
+        return new VMStorage(StorageType.STACK, size, byteOffset);
+    }
+
+    public static VMStorage x87Storage(int index) {
+        return new VMStorage(StorageType.X87, STP_MASK, index, "X87(" + index + ")");
+    }
+
+    public static ABIDescriptor abiFor(VMStorage[] inputIntRegs, VMStorage[] inputVectorRegs, VMStorage[] outputIntRegs,
+                                       VMStorage[] outputVectorRegs, int numX87Outputs, VMStorage[] volatileIntRegs,
+                                       VMStorage[] volatileVectorRegs, int stackAlignment, int shadowSpace,
+                                       VMStorage scratch1, VMStorage scratch2) {
+        return new ABIDescriptor(
+            INSTANCE,
+            new VMStorage[][] {
+                inputIntRegs,
+                inputVectorRegs,
+            },
+            new VMStorage[][] {
+                outputIntRegs,
+                outputVectorRegs,
+                IntStream.range(0, numX87Outputs)
+                         .mapToObj(X86_64Architecture::x87Storage)
+                         .toArray(VMStorage[]::new)
+            },
+            new VMStorage[][] {
+                volatileIntRegs,
+                volatileVectorRegs,
+            },
+            stackAlignment,
+            shadowSpace,
+            scratch1, scratch2,
+            StubLocations.TARGET_ADDRESS.storage(StorageType.PLACEHOLDER),
+            StubLocations.RETURN_BUFFER.storage(StorageType.PLACEHOLDER),
+            StubLocations.CAPTURED_STATE_BUFFER.storage(StorageType.PLACEHOLDER));
+    }
+
+}
diff --git a/tests/test_data/std/jdk/internal/foreign/abi/x64/sysv/ArgumentClassImpl.class b/tests/test_data/std/jdk/internal/foreign/abi/x64/sysv/ArgumentClassImpl.class
new file mode 100644
index 0000000000000000000000000000000000000000..7d3710ca0342f821f05db795df1ed812ee9a09c8
GIT binary patch
literal 2303
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zby*?K=l|f|32<ZY0?c#(#yS8a2z5)m%@grNjZSnh`%b*LA;vMi<eR`fgt-Ds@#ybR
zN-D#)N@14RDn(c&tJHPOK~dsch+8F{g|td>iUvq18ziA{*b>!zvo~~DOsap$55Xnh
z{KhL1*VPx8dJa`G(_zVIlDQF)j3JqsF3H3sGpk7^E}1!9GG`=nGw$0BNbXkLHyo7Q
jeB8Gjeu;(W7!hscJ88&gGK?quFCPkeWeeNXhp_WE6Eo5t

literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/foreign/abi/x64/sysv/ArgumentClassImpl.java b/tests/test_data/std/jdk/internal/foreign/abi/x64/sysv/ArgumentClassImpl.java
new file mode 100644
index 00000000..7bd9dc61
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/foreign/abi/x64/sysv/ArgumentClassImpl.java
@@ -0,0 +1,75 @@
+/*
+ * Copyright (c) 2020, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package jdk.internal.foreign.abi.x64.sysv;
+
+public enum ArgumentClassImpl {
+    POINTER, INTEGER, SSE, SSEUP, X87, X87UP, COMPLEX_X87, NO_CLASS, MEMORY;
+
+    public ArgumentClassImpl merge(ArgumentClassImpl other) {
+        if (this == other) {
+            return this;
+        }
+
+        if (other == NO_CLASS) {
+            return this;
+        }
+        if (this == NO_CLASS) {
+            return other;
+        }
+
+        if (this == MEMORY || other == MEMORY) {
+            return MEMORY;
+        }
+
+        if (this == POINTER || other == POINTER) {
+            return POINTER;
+        }
+
+        if (this == INTEGER || other == INTEGER) {
+            return INTEGER;
+        }
+
+        if (this == X87 || this == X87UP || this == COMPLEX_X87) {
+            return MEMORY;
+        }
+        if (other == X87 || other == X87UP || other == COMPLEX_X87) {
+            return MEMORY;
+        }
+
+        return SSE;
+    }
+
+    public boolean isIntegral() {
+        return this == INTEGER || this == POINTER;
+    }
+
+    public boolean isPointer() {
+        return this == POINTER;
+    }
+
+    public boolean isIndirect() {
+        return this == MEMORY;
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/foreign/abi/x64/sysv/CallArranger$1.class b/tests/test_data/std/jdk/internal/foreign/abi/x64/sysv/CallArranger$1.class
new file mode 100644
index 0000000000000000000000000000000000000000..b47a70f3945cc4c77516687ad81056b6340ec1ec
GIT binary patch
literal 992
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/foreign/abi/x64/sysv/CallArranger$BindingCalculator.class b/tests/test_data/std/jdk/internal/foreign/abi/x64/sysv/CallArranger$BindingCalculator.class
new file mode 100644
index 0000000000000000000000000000000000000000..6b63ce79f96e5a94efeec94bd0927a8c1c81c443
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diff --git a/tests/test_data/std/jdk/internal/foreign/abi/x64/sysv/CallArranger$Bindings.class b/tests/test_data/std/jdk/internal/foreign/abi/x64/sysv/CallArranger$Bindings.class
new file mode 100644
index 0000000000000000000000000000000000000000..6b0d00b68f1b1102e2017a3c53356980a1427e1d
GIT binary patch
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diff --git a/tests/test_data/std/jdk/internal/foreign/abi/x64/sysv/CallArranger$BoxBindingCalculator.class b/tests/test_data/std/jdk/internal/foreign/abi/x64/sysv/CallArranger$BoxBindingCalculator.class
new file mode 100644
index 0000000000000000000000000000000000000000..b5169ce60fc9c71d0bdae3f4a609d5066edc705c
GIT binary patch
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diff --git a/tests/test_data/std/jdk/internal/foreign/abi/x64/sysv/CallArranger$StorageCalculator.class b/tests/test_data/std/jdk/internal/foreign/abi/x64/sysv/CallArranger$StorageCalculator.class
new file mode 100644
index 0000000000000000000000000000000000000000..c7a8e18fecdab399dd140a70a186296450043c95
GIT binary patch
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HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/foreign/abi/x64/sysv/CallArranger$UnboxBindingCalculator.class b/tests/test_data/std/jdk/internal/foreign/abi/x64/sysv/CallArranger$UnboxBindingCalculator.class
new file mode 100644
index 0000000000000000000000000000000000000000..0b35cb010b18e971777bdb6b28aa3ba8867f5998
GIT binary patch
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HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/foreign/abi/x64/sysv/CallArranger.class b/tests/test_data/std/jdk/internal/foreign/abi/x64/sysv/CallArranger.class
new file mode 100644
index 0000000000000000000000000000000000000000..251c3e76b462b8a17c69baca41faf370cd68f288
GIT binary patch
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/foreign/abi/x64/sysv/CallArranger.java b/tests/test_data/std/jdk/internal/foreign/abi/x64/sysv/CallArranger.java
new file mode 100644
index 00000000..78db1ca8
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/foreign/abi/x64/sysv/CallArranger.java
@@ -0,0 +1,354 @@
+/*
+ *  Copyright (c) 2020, 2023, Oracle and/or its affiliates. All rights reserved.
+ *  DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ *  This code is free software; you can redistribute it and/or modify it
+ *  under the terms of the GNU General Public License version 2 only, as
+ *  published by the Free Software Foundation.  Oracle designates this
+ *  particular file as subject to the "Classpath" exception as provided
+ *  by Oracle in the LICENSE file that accompanied this code.
+ *
+ *  This code is distributed in the hope that it will be useful, but WITHOUT
+ *  ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ *  FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ *  version 2 for more details (a copy is included in the LICENSE file that
+ *  accompanied this code).
+ *
+ *  You should have received a copy of the GNU General Public License version
+ *  2 along with this work; if not, write to the Free Software Foundation,
+ *  Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ *   Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ *  or visit www.oracle.com if you need additional information or have any
+ *  questions.
+ *
+ */
+package jdk.internal.foreign.abi.x64.sysv;
+
+import jdk.internal.foreign.Utils;
+import jdk.internal.foreign.abi.ABIDescriptor;
+import jdk.internal.foreign.abi.AbstractLinker.UpcallStubFactory;
+import jdk.internal.foreign.abi.Binding;
+import jdk.internal.foreign.abi.CallingSequence;
+import jdk.internal.foreign.abi.CallingSequenceBuilder;
+import jdk.internal.foreign.abi.DowncallLinker;
+import jdk.internal.foreign.abi.LinkerOptions;
+import jdk.internal.foreign.abi.SharedUtils;
+import jdk.internal.foreign.abi.VMStorage;
+import jdk.internal.foreign.abi.x64.X86_64Architecture;
+
+import java.lang.foreign.AddressLayout;
+import java.lang.foreign.FunctionDescriptor;
+import java.lang.foreign.GroupLayout;
+import java.lang.foreign.MemoryLayout;
+import java.lang.foreign.MemorySegment;
+import java.lang.foreign.ValueLayout;
+import java.lang.invoke.MethodHandle;
+import java.lang.invoke.MethodHandles;
+import java.lang.invoke.MethodType;
+import java.util.List;
+import java.util.Optional;
+
+import static jdk.internal.foreign.abi.Binding.vmStore;
+import static jdk.internal.foreign.abi.x64.X86_64Architecture.*;
+import static jdk.internal.foreign.abi.x64.X86_64Architecture.Regs.*;
+
+/**
+ * For the SysV x64 C ABI specifically, this class uses namely CallingSequenceBuilder
+ * to translate a C FunctionDescriptor into a CallingSequence, which can then be turned into a MethodHandle.
+ *
+ * This includes taking care of synthetic arguments like pointers to return buffers for 'in-memory' returns.
+ */
+public class CallArranger {
+    private static final int STACK_SLOT_SIZE = 8;
+    private static final int MAX_INTEGER_ARGUMENT_REGISTERS = 6;
+    private static final int MAX_VECTOR_ARGUMENT_REGISTERS = 8;
+
+    /**
+     * The {@code long} native type.
+     */
+    public static final ValueLayout.OfLong C_LONG = ValueLayout.JAVA_LONG;
+
+    private static final ABIDescriptor CSysV = X86_64Architecture.abiFor(
+        new VMStorage[] { rdi, rsi, rdx, rcx, r8, r9, rax },
+        new VMStorage[] { xmm0, xmm1, xmm2, xmm3, xmm4, xmm5, xmm6, xmm7 },
+        new VMStorage[] { rax, rdx },
+        new VMStorage[] { xmm0, xmm1 },
+        2,
+        new VMStorage[] { r10, r11 },
+        new VMStorage[] { xmm8, xmm9, xmm10, xmm11, xmm12, xmm13, xmm14, xmm15,
+                          xmm16, xmm17, xmm18, xmm19, xmm20, xmm21, xmm22, xmm23,
+                          xmm24, xmm25, xmm26, xmm27, xmm28, xmm29, xmm30, xmm31 },
+        16,
+        0, //no shadow space
+        r10, r11 // scratch 1 & 2
+    );
+
+    public record Bindings(
+            CallingSequence callingSequence,
+            boolean isInMemoryReturn,
+            int nVectorArgs) {
+    }
+
+    public static Bindings getBindings(MethodType mt, FunctionDescriptor cDesc, boolean forUpcall) {
+        return getBindings(mt, cDesc, forUpcall, LinkerOptions.empty());
+    }
+
+    public static Bindings getBindings(MethodType mt, FunctionDescriptor cDesc, boolean forUpcall, LinkerOptions options) {
+        CallingSequenceBuilder csb = new CallingSequenceBuilder(CSysV, forUpcall, options);
+
+        BindingCalculator argCalc = forUpcall ? new BoxBindingCalculator(true) : new UnboxBindingCalculator(true, options.allowsHeapAccess());
+        BindingCalculator retCalc = forUpcall ? new UnboxBindingCalculator(false, false) : new BoxBindingCalculator(false);
+
+        boolean returnInMemory = isInMemoryReturn(cDesc.returnLayout());
+        if (returnInMemory) {
+            Class<?> carrier = MemorySegment.class;
+            MemoryLayout layout = SharedUtils.C_POINTER;
+            csb.addArgumentBindings(carrier, layout, argCalc.getBindings(carrier, layout));
+        } else if (cDesc.returnLayout().isPresent()) {
+            Class<?> carrier = mt.returnType();
+            MemoryLayout layout = cDesc.returnLayout().get();
+            csb.setReturnBindings(carrier, layout, retCalc.getBindings(carrier, layout));
+        }
+
+        for (int i = 0; i < mt.parameterCount(); i++) {
+            Class<?> carrier = mt.parameterType(i);
+            MemoryLayout layout = cDesc.argumentLayouts().get(i);
+            csb.addArgumentBindings(carrier, layout, argCalc.getBindings(carrier, layout));
+        }
+
+        if (!forUpcall && options.isVariadicFunction()) {
+            //add extra binding for number of used vector registers (used for variadic calls)
+            csb.addArgumentBindings(long.class, C_LONG,
+                    List.of(vmStore(rax, long.class)));
+        }
+
+        return new Bindings(csb.build(), returnInMemory, argCalc.storageCalculator.nVectorReg);
+    }
+
+    public static MethodHandle arrangeDowncall(MethodType mt, FunctionDescriptor cDesc, LinkerOptions options) {
+        Bindings bindings = getBindings(mt, cDesc, false, options);
+
+        MethodHandle handle = new DowncallLinker(CSysV, bindings.callingSequence).getBoundMethodHandle();
+        if (options.isVariadicFunction()) {
+            handle = MethodHandles.insertArguments(handle, handle.type().parameterCount() - 1, bindings.nVectorArgs);
+        }
+
+        if (bindings.isInMemoryReturn) {
+            handle = SharedUtils.adaptDowncallForIMR(handle, cDesc, bindings.callingSequence);
+        }
+
+        return handle;
+    }
+
+    public static UpcallStubFactory arrangeUpcall(MethodType mt, FunctionDescriptor cDesc, LinkerOptions options) {
+        Bindings bindings = getBindings(mt, cDesc, true, options);
+        final boolean dropReturn = true; /* drop return, since we don't have bindings for it */
+        return SharedUtils.arrangeUpcallHelper(mt, bindings.isInMemoryReturn, dropReturn, CSysV,
+                bindings.callingSequence);
+    }
+
+    private static boolean isInMemoryReturn(Optional<MemoryLayout> returnLayout) {
+        return returnLayout
+                .filter(GroupLayout.class::isInstance)
+                .filter(g -> TypeClass.classifyLayout(g).inMemory())
+                .isPresent();
+    }
+
+    static class StorageCalculator {
+        private final boolean forArguments;
+
+        private int nVectorReg = 0;
+        private int nIntegerReg = 0;
+        private long stackOffset = 0;
+
+        public StorageCalculator(boolean forArguments) {
+            this.forArguments = forArguments;
+        }
+
+        private int maxRegisterArguments(int type) {
+            return type == StorageType.INTEGER ?
+                    MAX_INTEGER_ARGUMENT_REGISTERS :
+                    MAX_VECTOR_ARGUMENT_REGISTERS;
+        }
+
+        VMStorage stackAlloc() {
+            assert forArguments : "no stack returns";
+            VMStorage storage = X86_64Architecture.stackStorage((short) STACK_SLOT_SIZE, (int)stackOffset);
+            stackOffset += STACK_SLOT_SIZE;
+            return storage;
+        }
+
+        VMStorage nextStorage(int type) {
+            int registerCount = registerCount(type);
+            if (registerCount < maxRegisterArguments(type)) {
+                VMStorage[] source =
+                    (forArguments ? CSysV.inputStorage : CSysV.outputStorage)[type];
+                incrementRegisterCount(type);
+                return source[registerCount];
+            } else {
+                return stackAlloc();
+            }
+        }
+
+        VMStorage[] structStorages(TypeClass typeClass) {
+            if (typeClass.inMemory()) {
+                return typeClass.classes.stream().map(c -> stackAlloc()).toArray(VMStorage[]::new);
+            }
+            long nIntegerReg = typeClass.nIntegerRegs();
+
+            if (this.nIntegerReg + nIntegerReg > MAX_INTEGER_ARGUMENT_REGISTERS) {
+                //not enough registers - pass on stack
+                return typeClass.classes.stream().map(c -> stackAlloc()).toArray(VMStorage[]::new);
+            }
+
+            long nVectorReg = typeClass.nVectorRegs();
+
+            if (this.nVectorReg + nVectorReg > MAX_VECTOR_ARGUMENT_REGISTERS) {
+                //not enough registers - pass on stack
+                return typeClass.classes.stream().map(c -> stackAlloc()).toArray(VMStorage[]::new);
+            }
+
+            //ok, let's pass on registers
+            VMStorage[] storage = new VMStorage[(int)(nIntegerReg + nVectorReg)];
+            for (int i = 0 ; i < typeClass.classes.size() ; i++) {
+                boolean sse = typeClass.classes.get(i) == ArgumentClassImpl.SSE;
+                storage[i] = nextStorage(sse ? StorageType.VECTOR : StorageType.INTEGER);
+            }
+            return storage;
+        }
+
+        int registerCount(int type) {
+            return switch (type) {
+                case StorageType.INTEGER -> nIntegerReg;
+                case StorageType.VECTOR -> nVectorReg;
+                default -> throw new IllegalStateException();
+            };
+        }
+
+        void incrementRegisterCount(int type) {
+            switch (type) {
+                case StorageType.INTEGER -> nIntegerReg++;
+                case StorageType.VECTOR -> nVectorReg++;
+                default -> throw new IllegalStateException();
+            }
+        }
+    }
+
+    abstract static class BindingCalculator {
+        protected final StorageCalculator storageCalculator;
+
+        protected BindingCalculator(boolean forArguments) {
+            this.storageCalculator = new StorageCalculator(forArguments);
+        }
+
+        abstract List<Binding> getBindings(Class<?> carrier, MemoryLayout layout);
+    }
+
+    static class UnboxBindingCalculator extends BindingCalculator {
+        private final boolean useAddressPairs;
+
+        UnboxBindingCalculator(boolean forArguments, boolean useAddressPairs) {
+            super(forArguments);
+            this.useAddressPairs = useAddressPairs;
+        }
+
+        @Override
+        List<Binding> getBindings(Class<?> carrier, MemoryLayout layout) {
+            TypeClass argumentClass = TypeClass.classifyLayout(layout);
+            Binding.Builder bindings = Binding.builder();
+            switch (argumentClass.kind()) {
+                case STRUCT -> {
+                    assert carrier == MemorySegment.class;
+                    VMStorage[] regs = storageCalculator.structStorages(argumentClass);
+                    int regIndex = 0;
+                    long offset = 0;
+                    while (offset < layout.byteSize()) {
+                        final long copy = Math.min(layout.byteSize() - offset, 8);
+                        VMStorage storage = regs[regIndex++];
+                        if (offset + copy < layout.byteSize()) {
+                            bindings.dup();
+                        }
+                        boolean useFloat = storage.type() == StorageType.VECTOR;
+                        Class<?> type = SharedUtils.primitiveCarrierForSize(copy, useFloat);
+                        bindings.bufferLoad(offset, type, (int) copy)
+                                .vmStore(storage, type);
+                        offset += copy;
+                    }
+                }
+                case POINTER -> {
+                    VMStorage storage = storageCalculator.nextStorage(StorageType.INTEGER);
+                    if (useAddressPairs) {
+                        bindings.dup()
+                                .segmentBase()
+                                .vmStore(storage, Object.class)
+                                .segmentOffsetAllowHeap()
+                                .vmStore(null, long.class);
+                    } else {
+                        bindings.unboxAddress();
+                        bindings.vmStore(storage, long.class);
+                    }
+                }
+                case INTEGER -> {
+                    VMStorage storage = storageCalculator.nextStorage(StorageType.INTEGER);
+                    bindings.vmStore(storage, carrier);
+                }
+                case FLOAT -> {
+                    VMStorage storage = storageCalculator.nextStorage(StorageType.VECTOR);
+                    bindings.vmStore(storage, carrier);
+                }
+                default -> throw new UnsupportedOperationException("Unhandled class " + argumentClass);
+            }
+            return bindings.build();
+        }
+    }
+
+    static class BoxBindingCalculator extends BindingCalculator {
+
+        BoxBindingCalculator(boolean forArguments) {
+            super(forArguments);
+        }
+
+        @Override
+        List<Binding> getBindings(Class<?> carrier, MemoryLayout layout) {
+            TypeClass argumentClass = TypeClass.classifyLayout(layout);
+            Binding.Builder bindings = Binding.builder();
+            switch (argumentClass.kind()) {
+                case STRUCT -> {
+                    assert carrier == MemorySegment.class;
+                    bindings.allocate(layout);
+                    VMStorage[] regs = storageCalculator.structStorages(argumentClass);
+                    int regIndex = 0;
+                    long offset = 0;
+                    while (offset < layout.byteSize()) {
+                        final long copy = Math.min(layout.byteSize() - offset, 8);
+                        VMStorage storage = regs[regIndex++];
+                        bindings.dup();
+                        boolean useFloat = storage.type() == StorageType.VECTOR;
+                        Class<?> type = SharedUtils.primitiveCarrierForSize(copy, useFloat);
+                        bindings.vmLoad(storage, type)
+                                .bufferStore(offset, type, (int) copy);
+                        offset += copy;
+                    }
+                }
+                case POINTER -> {
+                    AddressLayout addressLayout = (AddressLayout) layout;
+                    VMStorage storage = storageCalculator.nextStorage(StorageType.INTEGER);
+                    bindings.vmLoad(storage, long.class)
+                            .boxAddressRaw(Utils.pointeeByteSize(addressLayout), Utils.pointeeByteAlign(addressLayout));
+                }
+                case INTEGER -> {
+                    VMStorage storage = storageCalculator.nextStorage(StorageType.INTEGER);
+                    bindings.vmLoad(storage, carrier);
+                }
+                case FLOAT -> {
+                    VMStorage storage = storageCalculator.nextStorage(StorageType.VECTOR);
+                    bindings.vmLoad(storage, carrier);
+                }
+                default -> throw new UnsupportedOperationException("Unhandled class " + argumentClass);
+            }
+            return bindings.build();
+        }
+    }
+
+}
diff --git a/tests/test_data/std/jdk/internal/foreign/abi/x64/sysv/SysVx64Linker$1Holder.class b/tests/test_data/std/jdk/internal/foreign/abi/x64/sysv/SysVx64Linker$1Holder.class
new file mode 100644
index 0000000000000000000000000000000000000000..cc2eee31d7f3d243bb06b5749f4047d797f73202
GIT binary patch
literal 707
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/foreign/abi/x64/sysv/SysVx64Linker.class b/tests/test_data/std/jdk/internal/foreign/abi/x64/sysv/SysVx64Linker.class
new file mode 100644
index 0000000000000000000000000000000000000000..1feba96a22f881b39c588b0550fcc2d32b4316d3
GIT binary patch
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/foreign/abi/x64/sysv/SysVx64Linker.java b/tests/test_data/std/jdk/internal/foreign/abi/x64/sysv/SysVx64Linker.java
new file mode 100644
index 00000000..b1fce35a
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/foreign/abi/x64/sysv/SysVx64Linker.java
@@ -0,0 +1,74 @@
+/*
+ * Copyright (c) 2020, 2024, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package jdk.internal.foreign.abi.x64.sysv;
+
+
+import jdk.internal.foreign.abi.AbstractLinker;
+import jdk.internal.foreign.abi.LinkerOptions;
+import jdk.internal.foreign.abi.SharedUtils;
+
+import java.lang.foreign.FunctionDescriptor;
+import java.lang.foreign.MemoryLayout;
+import java.lang.foreign.ValueLayout;
+import java.lang.invoke.MethodHandle;
+import java.lang.invoke.MethodType;
+import java.nio.ByteOrder;
+import java.util.Map;
+
+/**
+ * ABI implementation based on System V ABI AMD64 supplement v.0.99.6
+ */
+public final class SysVx64Linker extends AbstractLinker {
+
+    static final Map<String, MemoryLayout> CANONICAL_LAYOUTS =
+            SharedUtils.canonicalLayouts(ValueLayout.JAVA_LONG, ValueLayout.JAVA_LONG, ValueLayout.JAVA_INT);
+
+    public static SysVx64Linker getInstance() {
+        final class Holder {
+            private static final SysVx64Linker INSTANCE = new SysVx64Linker();
+        }
+
+        return Holder.INSTANCE;
+    }
+
+    private SysVx64Linker() {
+        // Ensure there is only one instance
+    }
+
+    @Override
+    protected MethodHandle arrangeDowncall(MethodType inferredMethodType, FunctionDescriptor function, LinkerOptions options) {
+        return CallArranger.arrangeDowncall(inferredMethodType, function, options);
+    }
+
+    @Override
+    protected UpcallStubFactory arrangeUpcall(MethodType targetType, FunctionDescriptor function, LinkerOptions options) {
+        return CallArranger.arrangeUpcall(targetType, function, options);
+    }
+
+    @Override
+    public Map<String, MemoryLayout> canonicalLayouts() {
+        return CANONICAL_LAYOUTS;
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/foreign/abi/x64/sysv/TypeClass$1.class b/tests/test_data/std/jdk/internal/foreign/abi/x64/sysv/TypeClass$1.class
new file mode 100644
index 0000000000000000000000000000000000000000..f59eada13c1c3c369158206cdfd59be6d4fce1b7
GIT binary patch
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/foreign/abi/x64/sysv/TypeClass$Kind.class b/tests/test_data/std/jdk/internal/foreign/abi/x64/sysv/TypeClass$Kind.class
new file mode 100644
index 0000000000000000000000000000000000000000..2011c3f4ef79b71c81acd34ad6eb2030da6c22b5
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literal 0
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diff --git a/tests/test_data/std/jdk/internal/foreign/abi/x64/sysv/TypeClass.class b/tests/test_data/std/jdk/internal/foreign/abi/x64/sysv/TypeClass.class
new file mode 100644
index 0000000000000000000000000000000000000000..39ba18f36ba90b76cf3e4d4ac33297bb1f566689
GIT binary patch
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diff --git a/tests/test_data/std/jdk/internal/foreign/abi/x64/sysv/TypeClass.java b/tests/test_data/std/jdk/internal/foreign/abi/x64/sysv/TypeClass.java
new file mode 100644
index 00000000..429b29e7
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/foreign/abi/x64/sysv/TypeClass.java
@@ -0,0 +1,247 @@
+/*
+ * Copyright (c) 2020, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package jdk.internal.foreign.abi.x64.sysv;
+
+import java.lang.foreign.GroupLayout;
+import java.lang.foreign.MemoryLayout;
+import java.lang.foreign.MemorySegment;
+import java.lang.foreign.PaddingLayout;
+import java.lang.foreign.SequenceLayout;
+import java.lang.foreign.StructLayout;
+import java.lang.foreign.ValueLayout;
+import jdk.internal.foreign.Utils;
+
+import java.util.ArrayList;
+import java.util.List;
+import java.util.stream.Collectors;
+import java.util.stream.IntStream;
+
+class TypeClass {
+    enum Kind {
+        STRUCT,
+        POINTER,
+        INTEGER,
+        FLOAT
+    }
+
+    private final Kind kind;
+    final List<ArgumentClassImpl> classes;
+
+    private TypeClass(Kind kind, List<ArgumentClassImpl> classes) {
+        this.kind = kind;
+        this.classes = classes;
+    }
+
+    public static TypeClass ofValue(ValueLayout layout) {
+        final Kind kind;
+        ArgumentClassImpl argClass = argumentClassFor(layout);
+        kind = switch (argClass) {
+            case POINTER -> Kind.POINTER;
+            case INTEGER -> Kind.INTEGER;
+            case SSE -> Kind.FLOAT;
+            default -> throw new IllegalStateException("Unexpected argument class: " + argClass);
+        };
+        return new TypeClass(kind, List.of(argClass));
+    }
+
+    public static TypeClass ofStruct(GroupLayout layout) {
+        return new TypeClass(Kind.STRUCT, classifyStructType(layout));
+    }
+
+    boolean inMemory() {
+        return classes.stream().anyMatch(c -> c == ArgumentClassImpl.MEMORY);
+    }
+
+    private long numClasses(ArgumentClassImpl clazz) {
+        return classes.stream().filter(c -> c == clazz).count();
+    }
+
+    public long nIntegerRegs() {
+        return numClasses(ArgumentClassImpl.INTEGER) + numClasses(ArgumentClassImpl.POINTER);
+    }
+
+    public long nVectorRegs() {
+        return numClasses(ArgumentClassImpl.SSE);
+    }
+
+    public Kind kind() {
+        return kind;
+    }
+
+    // layout classification
+
+    // The AVX 512 enlightened ABI says "eight eightbytes"
+    // Although AMD64 0.99.6 states 4 eightbytes
+    private static final int MAX_AGGREGATE_REGS_SIZE = 8;
+    static final List<ArgumentClassImpl> COMPLEX_X87_CLASSES = List.of(
+         ArgumentClassImpl.X87,
+         ArgumentClassImpl.X87UP,
+         ArgumentClassImpl.X87,
+         ArgumentClassImpl.X87UP
+    );
+
+    private static List<ArgumentClassImpl> createMemoryClassArray(long size) {
+        return IntStream.range(0, (int)size)
+                .mapToObj(i -> ArgumentClassImpl.MEMORY)
+                .collect(Collectors.toCollection(ArrayList::new));
+    }
+
+    private static ArgumentClassImpl argumentClassFor(ValueLayout layout) {
+        Class<?> carrier = layout.carrier();
+        if (carrier == boolean.class || carrier == byte.class || carrier == char.class ||
+                carrier == short.class || carrier == int.class || carrier == long.class) {
+            return ArgumentClassImpl.INTEGER;
+        } else if (carrier == float.class || carrier == double.class) {
+            return ArgumentClassImpl.SSE;
+        } else if (carrier == MemorySegment.class) {
+            return ArgumentClassImpl.POINTER;
+        } else {
+            throw new IllegalStateException("Cannot get here: " + carrier.getName());
+        }
+    }
+
+    // TODO: handle zero length arrays
+    private static List<ArgumentClassImpl> classifyStructType(GroupLayout type) {
+        List<ArgumentClassImpl>[] eightbytes = groupByEightBytes(type);
+        long nWords = eightbytes.length;
+        if (nWords > MAX_AGGREGATE_REGS_SIZE) {
+            return createMemoryClassArray(nWords);
+        }
+
+        ArrayList<ArgumentClassImpl> classes = new ArrayList<>();
+
+        for (int idx = 0; idx < nWords; idx++) {
+            List<ArgumentClassImpl> subclasses = eightbytes[idx];
+            ArgumentClassImpl result = subclasses.stream()
+                    .reduce(ArgumentClassImpl.NO_CLASS, ArgumentClassImpl::merge);
+            classes.add(result);
+        }
+
+        for (int i = 0; i < classes.size(); i++) {
+            ArgumentClassImpl c = classes.get(i);
+
+            if (c == ArgumentClassImpl.MEMORY) {
+                // if any of the eightbytes was passed in memory, pass the whole thing in memory
+                return createMemoryClassArray(classes.size());
+            }
+
+            if (c == ArgumentClassImpl.X87UP) {
+                if (i == 0) {
+                    throw new IllegalArgumentException("Unexpected leading X87UP class");
+                }
+
+                if (classes.get(i - 1) != ArgumentClassImpl.X87) {
+                    return createMemoryClassArray(classes.size());
+                }
+            }
+        }
+
+        if (classes.size() > 2) {
+            if (classes.get(0) != ArgumentClassImpl.SSE) {
+                return createMemoryClassArray(classes.size());
+            }
+
+            for (int i = 1; i < classes.size(); i++) {
+                if (classes.get(i) != ArgumentClassImpl.SSEUP) {
+                    return createMemoryClassArray(classes.size());
+                }
+            }
+        }
+
+        return classes;
+    }
+
+    static TypeClass classifyLayout(MemoryLayout type) {
+        try {
+            if (type instanceof ValueLayout valueLayout) {
+                return ofValue(valueLayout);
+            } else if (type instanceof GroupLayout groupLayout) {
+                return ofStruct(groupLayout);
+            } else {
+                throw new IllegalArgumentException("Unsupported layout: " + type);
+            }
+        } catch (UnsupportedOperationException e) {
+            System.err.println("Failed to classify layout: " + type);
+            throw e;
+        }
+    }
+
+    private static List<ArgumentClassImpl>[] groupByEightBytes(GroupLayout group) {
+        long offset = 0L;
+        int nEightbytes;
+        try {
+            // alignUp can overflow the value, but it's okay since toIntExact still catches it
+            nEightbytes = Math.toIntExact(Utils.alignUp(group.byteSize(), 8) / 8);
+        } catch (ArithmeticException e) {
+            throw new IllegalArgumentException("GroupLayout is too large: " + group, e);
+        }
+        @SuppressWarnings({"unchecked", "rawtypes"})
+        List<ArgumentClassImpl>[] groups = new List[nEightbytes];
+        for (MemoryLayout l : group.memberLayouts()) {
+            groupByEightBytes(l, offset, groups);
+            if (group instanceof StructLayout) {
+                offset += l.byteSize();
+            }
+        }
+        return groups;
+    }
+
+    private static void groupByEightBytes(MemoryLayout layout,
+                                          long offset,
+                                          List<ArgumentClassImpl>[] groups) {
+        switch (layout) {
+            case GroupLayout group -> {
+                for (MemoryLayout m : group.memberLayouts()) {
+                    groupByEightBytes(m, offset, groups);
+                    if (group instanceof StructLayout) {
+                        offset += m.byteSize();
+                    }
+                }
+            }
+            case PaddingLayout  _ -> {
+            }
+            case SequenceLayout seq -> {
+                MemoryLayout elem = seq.elementLayout();
+                for (long i = 0; i < seq.elementCount(); i++) {
+                    groupByEightBytes(elem, offset, groups);
+                    offset += elem.byteSize();
+                }
+            }
+            case ValueLayout vl -> {
+                List<ArgumentClassImpl> layouts = groups[(int) offset / 8];
+                if (layouts == null) {
+                    layouts = new ArrayList<>();
+                    groups[(int) offset / 8] = layouts;
+                }
+                // if the aggregate contains unaligned fields, it has class MEMORY
+                ArgumentClassImpl argumentClass = (offset % vl.byteAlignment()) == 0 ?
+                        argumentClassFor(vl) :
+                        ArgumentClassImpl.MEMORY;
+                layouts.add(argumentClass);
+            }
+            case null, default -> throw new IllegalStateException("Unexpected layout: " + layout);
+        }
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/foreign/abi/x64/windows/CallArranger$1.class b/tests/test_data/std/jdk/internal/foreign/abi/x64/windows/CallArranger$1.class
new file mode 100644
index 0000000000000000000000000000000000000000..a198a2399c93d21b896e374a32dda01e01183520
GIT binary patch
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diff --git a/tests/test_data/std/jdk/internal/foreign/abi/x64/windows/CallArranger$1CallingSequenceBuilderHelper.class b/tests/test_data/std/jdk/internal/foreign/abi/x64/windows/CallArranger$1CallingSequenceBuilderHelper.class
new file mode 100644
index 0000000000000000000000000000000000000000..a13462b2a2275449907f70c5018f42b79f7ebab4
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diff --git a/tests/test_data/std/jdk/internal/foreign/abi/x64/windows/CallArranger$BindingCalculator.class b/tests/test_data/std/jdk/internal/foreign/abi/x64/windows/CallArranger$BindingCalculator.class
new file mode 100644
index 0000000000000000000000000000000000000000..8f1ac566daea59803f8bd44adc0b5f81701c863c
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diff --git a/tests/test_data/std/jdk/internal/foreign/abi/x64/windows/CallArranger$Bindings.class b/tests/test_data/std/jdk/internal/foreign/abi/x64/windows/CallArranger$Bindings.class
new file mode 100644
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literal 0
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diff --git a/tests/test_data/std/jdk/internal/foreign/abi/x64/windows/CallArranger$BoxBindingCalculator.class b/tests/test_data/std/jdk/internal/foreign/abi/x64/windows/CallArranger$BoxBindingCalculator.class
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diff --git a/tests/test_data/std/jdk/internal/foreign/abi/x64/windows/CallArranger$StorageCalculator.class b/tests/test_data/std/jdk/internal/foreign/abi/x64/windows/CallArranger$StorageCalculator.class
new file mode 100644
index 0000000000000000000000000000000000000000..d772d63832fd99ee5caf4d0c5865d7e24a7a8d2b
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diff --git a/tests/test_data/std/jdk/internal/foreign/abi/x64/windows/CallArranger$UnboxBindingCalculator.class b/tests/test_data/std/jdk/internal/foreign/abi/x64/windows/CallArranger$UnboxBindingCalculator.class
new file mode 100644
index 0000000000000000000000000000000000000000..c9cbf654feb1d8854e8f167b69de8c69a714ea9f
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diff --git a/tests/test_data/std/jdk/internal/foreign/abi/x64/windows/CallArranger.class b/tests/test_data/std/jdk/internal/foreign/abi/x64/windows/CallArranger.class
new file mode 100644
index 0000000000000000000000000000000000000000..e8bcdeff9d9a9843780d8480f28781b3b225d997
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diff --git a/tests/test_data/std/jdk/internal/foreign/abi/x64/windows/CallArranger.java b/tests/test_data/std/jdk/internal/foreign/abi/x64/windows/CallArranger.java
new file mode 100644
index 00000000..cc69e79a
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/foreign/abi/x64/windows/CallArranger.java
@@ -0,0 +1,297 @@
+/*
+ * Copyright (c) 2020, 2023, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package jdk.internal.foreign.abi.x64.windows;
+
+import jdk.internal.foreign.Utils;
+import jdk.internal.foreign.abi.ABIDescriptor;
+import jdk.internal.foreign.abi.AbstractLinker.UpcallStubFactory;
+import jdk.internal.foreign.abi.Binding;
+import jdk.internal.foreign.abi.CallingSequence;
+import jdk.internal.foreign.abi.CallingSequenceBuilder;
+import jdk.internal.foreign.abi.DowncallLinker;
+import jdk.internal.foreign.abi.LinkerOptions;
+import jdk.internal.foreign.abi.SharedUtils;
+import jdk.internal.foreign.abi.VMStorage;
+import jdk.internal.foreign.abi.x64.X86_64Architecture;
+
+import java.lang.foreign.AddressLayout;
+import java.lang.foreign.FunctionDescriptor;
+import java.lang.foreign.GroupLayout;
+import java.lang.foreign.MemoryLayout;
+import java.lang.foreign.MemorySegment;
+import java.lang.invoke.MethodHandle;
+import java.lang.invoke.MethodType;
+import java.util.List;
+import java.util.Optional;
+
+import static jdk.internal.foreign.abi.x64.X86_64Architecture.*;
+import static jdk.internal.foreign.abi.x64.X86_64Architecture.Regs.*;
+
+/**
+ * For the Windowx x64 C ABI specifically, this class uses CallingSequenceBuilder
+ * to translate a C FunctionDescriptor into a CallingSequence, which can then be turned into a MethodHandle.
+ *
+ * This includes taking care of synthetic arguments like pointers to return buffers for 'in-memory' returns.
+ */
+public class CallArranger {
+    public static final int MAX_REGISTER_ARGUMENTS = 4;
+    private static final int STACK_SLOT_SIZE = 8;
+
+    private static final ABIDescriptor CWindows = X86_64Architecture.abiFor(
+        new VMStorage[] { rcx, rdx, r8, r9 },
+        new VMStorage[] { xmm0, xmm1, xmm2, xmm3 },
+        new VMStorage[] { rax },
+        new VMStorage[] { xmm0 },
+        0,
+        new VMStorage[] { rax, r10, r11 },
+        new VMStorage[] { xmm4, xmm5,
+                          xmm16, xmm17, xmm18, xmm19, xmm20, xmm21, xmm22, xmm23,
+                          xmm24, xmm25, xmm26, xmm27, xmm28, xmm29, xmm30, xmm31 },
+        16,
+        32,
+        r10, r11 // scratch 1 & 2
+    );
+
+    public record Bindings(
+            CallingSequence callingSequence,
+            boolean isInMemoryReturn) {
+    }
+
+    public static Bindings getBindings(MethodType mt, FunctionDescriptor cDesc, boolean forUpcall) {
+        return getBindings(mt, cDesc, forUpcall, LinkerOptions.empty());
+    }
+
+    public static Bindings getBindings(MethodType mt, FunctionDescriptor cDesc, boolean forUpcall, LinkerOptions options) {
+        class CallingSequenceBuilderHelper {
+            final CallingSequenceBuilder csb = new CallingSequenceBuilder(CWindows, forUpcall, options);
+            final BindingCalculator argCalc =
+                    forUpcall ? new BoxBindingCalculator(true) : new UnboxBindingCalculator(true, options.allowsHeapAccess());
+            final BindingCalculator retCalc =
+                    forUpcall ? new UnboxBindingCalculator(false, false) : new BoxBindingCalculator(false);
+
+            void addArgumentBindings(Class<?> carrier, MemoryLayout layout, boolean isVararg) {
+                csb.addArgumentBindings(carrier, layout, argCalc.getBindings(carrier, layout, isVararg));
+            }
+
+            void setReturnBindings(Class<?> carrier, MemoryLayout layout) {
+                csb.setReturnBindings(carrier, layout, retCalc.getBindings(carrier, layout, false));
+            }
+        }
+        var csb = new CallingSequenceBuilderHelper();
+
+        boolean returnInMemory = isInMemoryReturn(cDesc.returnLayout());
+        if (returnInMemory) {
+            Class<?> carrier = MemorySegment.class;
+            MemoryLayout layout = SharedUtils.C_POINTER;
+            csb.addArgumentBindings(carrier, layout, false);
+            if (forUpcall) {
+                csb.setReturnBindings(carrier, layout);
+            }
+        } else if (cDesc.returnLayout().isPresent()) {
+            csb.setReturnBindings(mt.returnType(), cDesc.returnLayout().get());
+        }
+
+        for (int i = 0; i < mt.parameterCount(); i++) {
+            csb.addArgumentBindings(mt.parameterType(i), cDesc.argumentLayouts().get(i), options.isVarargsIndex(i));
+        }
+
+        return new Bindings(csb.csb.build(), returnInMemory);
+    }
+
+    public static MethodHandle arrangeDowncall(MethodType mt, FunctionDescriptor cDesc, LinkerOptions options) {
+        Bindings bindings = getBindings(mt, cDesc, false, options);
+
+        MethodHandle handle = new DowncallLinker(CWindows, bindings.callingSequence).getBoundMethodHandle();
+
+        if (bindings.isInMemoryReturn) {
+            handle = SharedUtils.adaptDowncallForIMR(handle, cDesc, bindings.callingSequence);
+        }
+
+        return handle;
+    }
+
+    public static UpcallStubFactory arrangeUpcall(MethodType mt, FunctionDescriptor cDesc, LinkerOptions options) {
+        Bindings bindings = getBindings(mt, cDesc, true, options);
+        final boolean dropReturn = false; /* need the return value as well */
+        return SharedUtils.arrangeUpcallHelper(mt, bindings.isInMemoryReturn, dropReturn, CWindows,
+                bindings.callingSequence);
+    }
+
+    private static boolean isInMemoryReturn(Optional<MemoryLayout> returnLayout) {
+        return returnLayout
+                .filter(GroupLayout.class::isInstance)
+                .filter(g -> !TypeClass.isRegisterAggregate(g))
+                .isPresent();
+    }
+
+    static class StorageCalculator {
+        private final boolean forArguments;
+
+        private int nRegs = 0;
+        private long stackOffset = 0;
+
+        public StorageCalculator(boolean forArguments) {
+            this.forArguments = forArguments;
+        }
+
+        VMStorage nextStorage(int type) {
+            if (nRegs >= MAX_REGISTER_ARGUMENTS) {
+                assert forArguments : "no stack returns";
+                // stack
+                assert stackOffset == Utils.alignUp(stackOffset, STACK_SLOT_SIZE); // should always be aligned
+
+                VMStorage storage = X86_64Architecture.stackStorage((short) STACK_SLOT_SIZE, (int) stackOffset);
+                stackOffset += STACK_SLOT_SIZE;
+                return storage;
+            }
+            return (forArguments
+                    ? CWindows.inputStorage
+                    : CWindows.outputStorage)
+                    [type][nRegs++];
+        }
+
+        public VMStorage extraVarargsStorage() {
+            assert forArguments;
+            return CWindows.inputStorage[StorageType.INTEGER][nRegs - 1];
+        }
+    }
+
+    private interface BindingCalculator {
+        List<Binding> getBindings(Class<?> carrier, MemoryLayout layout, boolean isVararg);
+    }
+
+    static class UnboxBindingCalculator implements BindingCalculator {
+        private final StorageCalculator storageCalculator;
+        private final boolean useAddressPairs;
+
+        UnboxBindingCalculator(boolean forArguments, boolean useAddressPairs) {
+            this.storageCalculator = new StorageCalculator(forArguments);
+            assert !useAddressPairs || forArguments;
+            this.useAddressPairs = useAddressPairs;
+        }
+
+        @Override
+        public List<Binding> getBindings(Class<?> carrier, MemoryLayout layout, boolean isVararg) {
+            TypeClass argumentClass = TypeClass.typeClassFor(layout, isVararg);
+            Binding.Builder bindings = Binding.builder();
+            switch (argumentClass) {
+                case STRUCT_REGISTER -> {
+                    assert carrier == MemorySegment.class;
+                    VMStorage storage = storageCalculator.nextStorage(StorageType.INTEGER);
+                    Class<?> type = SharedUtils.primitiveCarrierForSize(layout.byteSize(), false);
+                    bindings.bufferLoad(0, type)
+                            .vmStore(storage, type);
+                }
+                case STRUCT_REFERENCE -> {
+                    assert carrier == MemorySegment.class;
+                    bindings.copy(layout)
+                            .unboxAddress();
+                    VMStorage storage = storageCalculator.nextStorage(StorageType.INTEGER);
+                    bindings.vmStore(storage, long.class);
+                }
+                case POINTER -> {
+                    VMStorage storage = storageCalculator.nextStorage(StorageType.INTEGER);
+                    if (useAddressPairs) {
+                        bindings.dup()
+                                .segmentBase()
+                                .vmStore(storage, Object.class)
+                                .segmentOffsetAllowHeap()
+                                .vmStore(null, long.class);
+                    } else {
+                        bindings.unboxAddress();
+                        bindings.vmStore(storage, long.class);
+                    }
+                }
+                case INTEGER -> {
+                    VMStorage storage = storageCalculator.nextStorage(StorageType.INTEGER);
+                    bindings.vmStore(storage, carrier);
+                }
+                case FLOAT -> {
+                    VMStorage storage = storageCalculator.nextStorage(StorageType.VECTOR);
+                    bindings.vmStore(storage, carrier);
+                }
+                case VARARG_FLOAT -> {
+                    VMStorage storage = storageCalculator.nextStorage(StorageType.VECTOR);
+                    if (!INSTANCE.isStackType(storage.type())) { // need extra for register arg
+                        VMStorage extraStorage = storageCalculator.extraVarargsStorage();
+                        bindings.dup()
+                                .vmStore(extraStorage, carrier);
+                    }
+
+                    bindings.vmStore(storage, carrier);
+                }
+                default -> throw new UnsupportedOperationException("Unhandled class " + argumentClass);
+            }
+            return bindings.build();
+        }
+    }
+
+    static class BoxBindingCalculator implements BindingCalculator {
+        private final StorageCalculator storageCalculator;
+
+        BoxBindingCalculator(boolean forArguments) {
+            this.storageCalculator = new StorageCalculator(forArguments);
+        }
+
+        @Override
+        public List<Binding> getBindings(Class<?> carrier, MemoryLayout layout, boolean isVararg) {
+            TypeClass argumentClass = TypeClass.typeClassFor(layout, isVararg);
+            Binding.Builder bindings = Binding.builder();
+            switch (argumentClass) {
+                case STRUCT_REGISTER -> {
+                    assert carrier == MemorySegment.class;
+                    bindings.allocate(layout)
+                            .dup();
+                    VMStorage storage = storageCalculator.nextStorage(StorageType.INTEGER);
+                    Class<?> type = SharedUtils.primitiveCarrierForSize(layout.byteSize(), false);
+                    bindings.vmLoad(storage, type)
+                            .bufferStore(0, type);
+                }
+                case STRUCT_REFERENCE -> {
+                    assert carrier == MemorySegment.class;
+                    VMStorage storage = storageCalculator.nextStorage(StorageType.INTEGER);
+                    bindings.vmLoad(storage, long.class)
+                            .boxAddress(layout);
+                }
+                case POINTER -> {
+                    AddressLayout addressLayout = (AddressLayout) layout;
+                    VMStorage storage = storageCalculator.nextStorage(StorageType.INTEGER);
+                    bindings.vmLoad(storage, long.class)
+                            .boxAddressRaw(Utils.pointeeByteSize(addressLayout), Utils.pointeeByteAlign(addressLayout));
+                }
+                case INTEGER -> {
+                    VMStorage storage = storageCalculator.nextStorage(StorageType.INTEGER);
+                    bindings.vmLoad(storage, carrier);
+                }
+                case FLOAT -> {
+                    VMStorage storage = storageCalculator.nextStorage(StorageType.VECTOR);
+                    bindings.vmLoad(storage, carrier);
+                }
+                default -> throw new UnsupportedOperationException("Unhandled class " + argumentClass);
+            }
+            return bindings.build();
+        }
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/foreign/abi/x64/windows/TypeClass.class b/tests/test_data/std/jdk/internal/foreign/abi/x64/windows/TypeClass.class
new file mode 100644
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HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/foreign/abi/x64/windows/TypeClass.java b/tests/test_data/std/jdk/internal/foreign/abi/x64/windows/TypeClass.java
new file mode 100644
index 00000000..04839b74
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/foreign/abi/x64/windows/TypeClass.java
@@ -0,0 +1,91 @@
+/*
+ * Copyright (c) 2020, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package jdk.internal.foreign.abi.x64.windows;
+
+import java.lang.foreign.GroupLayout;
+import java.lang.foreign.MemoryLayout;
+import java.lang.foreign.MemorySegment;
+import java.lang.foreign.ValueLayout;
+
+enum TypeClass {
+    STRUCT_REGISTER,
+    STRUCT_REFERENCE,
+    POINTER,
+    INTEGER,
+    FLOAT,
+    VARARG_FLOAT;
+
+    private static TypeClass classifyValueType(ValueLayout type, boolean isVararg) {
+        // No 128-bit integers in the Windows C ABI. There are __m128(i|d) intrinsic types but, they act just
+        // like a struct when passing as an argument (passed by pointer).
+        // https://docs.microsoft.com/en-us/cpp/cpp/m128?view=vs-2019
+
+        // x87 is ignored on Windows:
+        // "The x87 register stack is unused, and may be used by the callee,
+        // but must be considered volatile across function calls."
+        // https://docs.microsoft.com/en-us/cpp/build/x64-calling-convention?view=vs-2019
+
+        Class<?> carrier = type.carrier();
+        if (carrier == boolean.class || carrier == byte.class || carrier == char.class ||
+                carrier == short.class || carrier == int.class || carrier == long.class) {
+            return INTEGER;
+        } else if (carrier == float.class || carrier == double.class) {
+            if (isVararg) {
+                return VARARG_FLOAT;
+            } else {
+                return FLOAT;
+            }
+        } else if (carrier == MemorySegment.class) {
+            return POINTER;
+        } else {
+            throw new IllegalStateException("Cannot get here: " + carrier.getName());
+        }
+    }
+
+    static boolean isRegisterAggregate(MemoryLayout type) {
+        long size = type.byteSize();
+        return size == 1
+            || size == 2
+            || size == 4
+            || size == 8;
+    }
+
+    private static TypeClass classifyStructType(MemoryLayout layout) {
+        if (isRegisterAggregate(layout)) {
+            return STRUCT_REGISTER;
+        }
+        return STRUCT_REFERENCE;
+    }
+
+    static TypeClass typeClassFor(MemoryLayout type, boolean isVararg) {
+        if (type instanceof ValueLayout) {
+            return classifyValueType((ValueLayout) type, isVararg);
+        } else if (type instanceof GroupLayout) {
+            return classifyStructType(type);
+        } else {
+            throw new IllegalArgumentException("Unsupported layout: " + type);
+        }
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/foreign/abi/x64/windows/Windowsx64Linker$1Holder.class b/tests/test_data/std/jdk/internal/foreign/abi/x64/windows/Windowsx64Linker$1Holder.class
new file mode 100644
index 0000000000000000000000000000000000000000..ac703af32923debcb8e7f9e91772212708b0fe4a
GIT binary patch
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diff --git a/tests/test_data/std/jdk/internal/foreign/abi/x64/windows/Windowsx64Linker.class b/tests/test_data/std/jdk/internal/foreign/abi/x64/windows/Windowsx64Linker.class
new file mode 100644
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HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/foreign/abi/x64/windows/Windowsx64Linker.java b/tests/test_data/std/jdk/internal/foreign/abi/x64/windows/Windowsx64Linker.java
new file mode 100644
index 00000000..30e4a5bd
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/foreign/abi/x64/windows/Windowsx64Linker.java
@@ -0,0 +1,73 @@
+/*
+ * Copyright (c) 2020, 2024, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package jdk.internal.foreign.abi.x64.windows;
+
+import jdk.internal.foreign.abi.AbstractLinker;
+import jdk.internal.foreign.abi.LinkerOptions;
+import jdk.internal.foreign.abi.SharedUtils;
+
+import java.lang.foreign.FunctionDescriptor;
+import java.lang.foreign.MemoryLayout;
+import java.lang.foreign.ValueLayout;
+import java.lang.invoke.MethodHandle;
+import java.lang.invoke.MethodType;
+import java.nio.ByteOrder;
+import java.util.Map;
+
+/**
+ * ABI implementation based on Windows ABI AMD64 supplement v.0.99.6
+ */
+public final class Windowsx64Linker extends AbstractLinker {
+
+    static final Map<String, MemoryLayout> CANONICAL_LAYOUTS =
+            SharedUtils.canonicalLayouts(ValueLayout.JAVA_INT, ValueLayout.JAVA_LONG, ValueLayout.JAVA_CHAR);
+
+    public static Windowsx64Linker getInstance() {
+        final class Holder {
+            private static final Windowsx64Linker INSTANCE = new Windowsx64Linker();
+        }
+
+        return Holder.INSTANCE;
+    }
+
+    private Windowsx64Linker() {
+        // Ensure there is only one instance
+    }
+
+    @Override
+    protected MethodHandle arrangeDowncall(MethodType inferredMethodType, FunctionDescriptor function, LinkerOptions options) {
+        return CallArranger.arrangeDowncall(inferredMethodType, function, options);
+    }
+
+    @Override
+    protected UpcallStubFactory arrangeUpcall(MethodType targetType, FunctionDescriptor function, LinkerOptions options) {
+        return CallArranger.arrangeUpcall(targetType, function, options);
+    }
+
+    @Override
+    public Map<String, MemoryLayout> canonicalLayouts() {
+        return CANONICAL_LAYOUTS;
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/foreign/layout/AbstractGroupLayout$Kind.class b/tests/test_data/std/jdk/internal/foreign/layout/AbstractGroupLayout$Kind.class
new file mode 100644
index 0000000000000000000000000000000000000000..55e94cb4b81962d1e50cdbafd4ab6ca58d9a9074
GIT binary patch
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diff --git a/tests/test_data/std/jdk/internal/foreign/layout/AbstractGroupLayout.class b/tests/test_data/std/jdk/internal/foreign/layout/AbstractGroupLayout.class
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diff --git a/tests/test_data/std/jdk/internal/foreign/layout/AbstractGroupLayout.java b/tests/test_data/std/jdk/internal/foreign/layout/AbstractGroupLayout.java
new file mode 100644
index 00000000..a2e6ff36
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/foreign/layout/AbstractGroupLayout.java
@@ -0,0 +1,133 @@
+/*
+ *  Copyright (c) 2019, 2023, Oracle and/or its affiliates. All rights reserved.
+ *  DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ *  This code is free software; you can redistribute it and/or modify it
+ *  under the terms of the GNU General Public License version 2 only, as
+ *  published by the Free Software Foundation.  Oracle designates this
+ *  particular file as subject to the "Classpath" exception as provided
+ *  by Oracle in the LICENSE file that accompanied this code.
+ *
+ *  This code is distributed in the hope that it will be useful, but WITHOUT
+ *  ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ *  FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ *  version 2 for more details (a copy is included in the LICENSE file that
+ *  accompanied this code).
+ *
+ *  You should have received a copy of the GNU General Public License version
+ *  2 along with this work; if not, write to the Free Software Foundation,
+ *  Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ *   Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ *  or visit www.oracle.com if you need additional information or have any
+ *  questions.
+ *
+ */
+package jdk.internal.foreign.layout;
+
+import java.lang.foreign.MemoryLayout;
+import java.util.List;
+import java.util.Objects;
+import java.util.Optional;
+import java.util.stream.Collectors;
+
+/**
+ * A compound layout that aggregates multiple <em>member layouts</em>. There are two ways in which member layouts
+ * can be combined: if member layouts are laid out one after the other, the resulting group layout is said to be a <em>struct</em>
+ * (see {@link MemoryLayout#structLayout(MemoryLayout...)}); conversely, if all member layouts are laid out at the same starting offset,
+ * the resulting group layout is said to be a <em>union</em> (see {@link MemoryLayout#unionLayout(MemoryLayout...)}).
+ *
+ * @implSpec
+ * This class is immutable, thread-safe and <a href="{@docRoot}/java.base/java/lang/doc-files/ValueBased.html">value-based</a>.
+ */
+abstract sealed class AbstractGroupLayout<L extends AbstractGroupLayout<L> & MemoryLayout>
+        extends AbstractLayout<L>
+        permits StructLayoutImpl, UnionLayoutImpl {
+
+    private final Kind kind;
+    private final List<MemoryLayout> elements;
+    final long minByteAlignment;
+
+    AbstractGroupLayout(Kind kind, List<MemoryLayout> elements, long byteSize, long byteAlignment, long minByteAlignment, Optional<String> name) {
+        super(byteSize, byteAlignment, name); // Subclassing creates toctou problems here
+        this.kind = kind;
+        this.elements = List.copyOf(elements);
+        this.minByteAlignment = minByteAlignment;
+    }
+
+    /**
+     * Returns the member layouts associated with this group.
+     *
+     * @apiNote the order in which member layouts are returned is the same order in which member layouts have
+     * been passed to one of the group layout factory methods (see {@link MemoryLayout#structLayout(MemoryLayout...)},
+     * {@link MemoryLayout#unionLayout(MemoryLayout...)}).
+     *
+     * @return the member layouts associated with this group.
+     */
+    public final List<MemoryLayout> memberLayouts() {
+        return elements; // "elements" are already unmodifiable.
+    }
+
+    /**
+     * {@inheritDoc}
+     */
+    @Override
+    public final String toString() {
+        return decorateLayoutString(elements.stream()
+                .map(Object::toString)
+                .collect(Collectors.joining(kind.delimTag, "[", "]")));
+    }
+
+    @Override
+    public L withByteAlignment(long byteAlignment) {
+        if (byteAlignment < minByteAlignment) {
+            throw new IllegalArgumentException("Invalid alignment constraint");
+        }
+        return super.withByteAlignment(byteAlignment);
+    }
+
+    /**
+     * {@inheritDoc}
+     */
+    @Override
+    public final boolean equals(Object other) {
+        return this == other ||
+                other instanceof AbstractGroupLayout<?> otherGroup &&
+                        super.equals(other) &&
+                        kind == otherGroup.kind &&
+                        elements.equals(otherGroup.elements);
+    }
+
+    /**
+     * {@inheritDoc}
+     */
+    @Override
+    public final int hashCode() {
+        return Objects.hash(super.hashCode(), kind, elements);
+    }
+
+    @Override
+    public final boolean hasNaturalAlignment() {
+        return byteAlignment() == minByteAlignment;
+    }
+
+    /**
+     * The group kind.
+     */
+    enum Kind {
+        /**
+         * A 'struct' kind.
+         */
+        STRUCT(""),
+        /**
+         * A 'union' kind.
+         */
+        UNION("|");
+
+        final String delimTag;
+
+        Kind(String delimTag) {
+            this.delimTag = delimTag;
+        }
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/foreign/layout/AbstractLayout$1Holder.class b/tests/test_data/std/jdk/internal/foreign/layout/AbstractLayout$1Holder.class
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HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/foreign/layout/AbstractLayout.java b/tests/test_data/std/jdk/internal/foreign/layout/AbstractLayout.java
new file mode 100644
index 00000000..796f0027
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/foreign/layout/AbstractLayout.java
@@ -0,0 +1,229 @@
+/*
+ *  Copyright (c) 2019, 2024, Oracle and/or its affiliates. All rights reserved.
+ *  DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ *  This code is free software; you can redistribute it and/or modify it
+ *  under the terms of the GNU General Public License version 2 only, as
+ *  published by the Free Software Foundation.  Oracle designates this
+ *  particular file as subject to the "Classpath" exception as provided
+ *  by Oracle in the LICENSE file that accompanied this code.
+ *
+ *  This code is distributed in the hope that it will be useful, but WITHOUT
+ *  ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ *  FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ *  version 2 for more details (a copy is included in the LICENSE file that
+ *  accompanied this code).
+ *
+ *  You should have received a copy of the GNU General Public License version
+ *  2 along with this work; if not, write to the Free Software Foundation,
+ *  Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ *   Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ *  or visit www.oracle.com if you need additional information or have any
+ *  questions.
+ *
+ */
+package jdk.internal.foreign.layout;
+
+import jdk.internal.foreign.LayoutPath;
+import jdk.internal.foreign.Utils;
+
+import java.lang.foreign.GroupLayout;
+import java.lang.foreign.MemoryLayout;
+import java.lang.foreign.MemoryLayout.PathElement;
+import java.lang.foreign.SequenceLayout;
+import java.lang.foreign.StructLayout;
+import java.lang.foreign.UnionLayout;
+import java.lang.foreign.ValueLayout;
+import java.lang.invoke.MethodHandle;
+import java.lang.invoke.MethodHandles;
+import java.lang.invoke.MethodType;
+import java.lang.invoke.VarHandle;
+import java.util.Objects;
+import java.util.Optional;
+import java.util.Set;
+import java.util.function.Function;
+import java.util.function.UnaryOperator;
+
+public abstract sealed class AbstractLayout<L extends AbstractLayout<L> & MemoryLayout>
+        permits AbstractGroupLayout, PaddingLayoutImpl, SequenceLayoutImpl, ValueLayouts.AbstractValueLayout {
+
+    private final long byteSize;
+    private final long byteAlignment;
+    private final Optional<String> name;
+
+    AbstractLayout(long byteSize, long byteAlignment, Optional<String> name) {
+        this.byteSize = MemoryLayoutUtil.requireByteSizeValid(byteSize, true);
+        this.byteAlignment = requirePowerOfTwoAndGreaterOrEqualToOne(byteAlignment);
+        this.name = Objects.requireNonNull(name);
+    }
+
+    public final L withName(String name) {
+        return dup(byteAlignment(), Optional.of(name));
+    }
+
+    @SuppressWarnings("unchecked")
+    public final L withoutName() {
+        return name.isPresent() ? dup(byteAlignment(), Optional.empty()) : (L) this;
+    }
+
+    public final Optional<String> name() {
+        return name;
+    }
+
+    public L withByteAlignment(long byteAlignment) {
+        return dup(byteAlignment, name);
+    }
+
+    public final long byteAlignment() {
+        return byteAlignment;
+    }
+
+    public final long byteSize() {
+        return byteSize;
+    }
+
+    public boolean hasNaturalAlignment() {
+        return byteSize == byteAlignment;
+    }
+
+    // the following methods have to copy the same Javadoc as in MemoryLayout, or subclasses will just show
+    // the Object methods javadoc
+
+    /**
+     * {@return the hash code value for this layout}
+     */
+    @Override
+    public int hashCode() {
+        return Objects.hash(name, byteSize, byteAlignment);
+    }
+
+    /**
+     * Compares the specified object with this layout for equality. Returns {@code true} if and only if the specified
+     * object is also a layout, and it is equal to this layout. Two layouts are considered equal if they are of
+     * the same kind, have the same size, name and alignment constraints. Furthermore, depending on the layout kind, additional
+     * conditions must be satisfied:
+     * <ul>
+     *     <li>two value layouts are considered equal if they have the same {@linkplain ValueLayout#order() order},
+     *     and {@linkplain ValueLayout#carrier() carrier}</li>
+     *     <li>two sequence layouts are considered equal if they have the same element count (see {@link SequenceLayout#elementCount()}), and
+     *     if their element layouts (see {@link SequenceLayout#elementLayout()}) are also equal</li>
+     *     <li>two group layouts are considered equal if they are of the same type (see {@link StructLayout},
+     *     {@link UnionLayout}) and if their member layouts (see {@link GroupLayout#memberLayouts()}) are also equal</li>
+     * </ul>
+     *
+     * @param other the object to be compared for equality with this layout.
+     * @return {@code true} if the specified object is equal to this layout.
+     */
+    @Override
+    public boolean equals(Object other) {
+        return other instanceof AbstractLayout<?> otherLayout &&
+                name.equals(otherLayout.name) &&
+                byteSize == otherLayout.byteSize &&
+                byteAlignment == otherLayout.byteAlignment;
+    }
+
+    /**
+     * {@return the string representation of this layout}
+     */
+    @Override
+    public abstract String toString();
+
+    abstract L dup(long byteAlignment, Optional<String> name);
+
+    String decorateLayoutString(String s) {
+        if (name().isPresent()) {
+            s = String.format("%s(%s)", s, name().get());
+        }
+        if (!hasNaturalAlignment()) {
+            s = byteAlignment() + "%" + s;
+        }
+        return s;
+    }
+
+    private static long requirePowerOfTwoAndGreaterOrEqualToOne(long value) {
+        if (!Utils.isPowerOfTwo(value) || // value must be a power of two
+                value < 1) { // value must be greater or equal to 1
+            throw new IllegalArgumentException("Invalid alignment: " + value);
+        }
+        return value;
+    }
+
+    public long scale(long offset, long index) {
+        Utils.checkNonNegativeArgument(offset, "offset");
+        Utils.checkNonNegativeArgument(index, "index");
+        return Math.addExact(offset, Math.multiplyExact(byteSize(), index));
+    }
+
+    public MethodHandle scaleHandle() {
+        class Holder {
+            static final MethodHandle MH_SCALE;
+            static {
+                try {
+                    MH_SCALE = MethodHandles.lookup().findVirtual(MemoryLayout.class, "scale",
+                            MethodType.methodType(long.class, long.class, long.class));
+                } catch (ReflectiveOperationException e) {
+                    throw new ExceptionInInitializerError(e);
+                }
+            }
+        }
+        return Holder.MH_SCALE.bindTo(this);
+    }
+
+
+    public long byteOffset(PathElement... elements) {
+        return computePathOp(LayoutPath.rootPath((MemoryLayout) this), LayoutPath::offset,
+                Set.of(LayoutPath.SequenceElement.class, LayoutPath.SequenceElementByRange.class, LayoutPath.DereferenceElement.class),
+                elements);
+    }
+
+    public MethodHandle byteOffsetHandle(PathElement... elements) {
+        return computePathOp(LayoutPath.rootPath((MemoryLayout) this), LayoutPath::offsetHandle,
+                Set.of(LayoutPath.DereferenceElement.class),
+                elements);
+    }
+
+    public VarHandle varHandle(PathElement... elements) {
+        Objects.requireNonNull(elements);
+        if (this instanceof ValueLayout vl && elements.length == 0) {
+            return vl.varHandle(); // fast path
+        }
+        return varHandleInternal(elements);
+    }
+
+    public VarHandle varHandleInternal(PathElement... elements) {
+        return computePathOp(LayoutPath.rootPath((MemoryLayout) this), LayoutPath::dereferenceHandle,
+                Set.of(), elements);
+    }
+
+    public VarHandle arrayElementVarHandle(PathElement... elements) {
+        return MethodHandles.collectCoordinates(varHandle(elements), 1, scaleHandle());
+    }
+
+    public MethodHandle sliceHandle(PathElement... elements) {
+        return computePathOp(LayoutPath.rootPath((MemoryLayout) this), LayoutPath::sliceHandle,
+                Set.of(LayoutPath.DereferenceElement.class),
+                elements);
+    }
+
+    public MemoryLayout select(PathElement... elements) {
+        return computePathOp(LayoutPath.rootPath((MemoryLayout) this), LayoutPath::layout,
+                Set.of(LayoutPath.SequenceElementByIndex.class, LayoutPath.SequenceElementByRange.class, LayoutPath.DereferenceElement.class),
+                elements);
+    }
+
+    private static <Z> Z computePathOp(LayoutPath path, Function<LayoutPath, Z> finalizer,
+                                       Set<Class<?>> badTypes, PathElement... elements) {
+        Objects.requireNonNull(elements);
+        for (PathElement e : elements) {
+            Objects.requireNonNull(e);
+            if (badTypes.contains(e.getClass())) {
+                throw new IllegalArgumentException("Invalid selection in layout path: " + e);
+            }
+            @SuppressWarnings("unchecked")
+            UnaryOperator<LayoutPath> pathOp = (UnaryOperator<LayoutPath>) e;
+            path = pathOp.apply(path);
+        }
+        return finalizer.apply(path);
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/foreign/layout/MemoryLayoutUtil.class b/tests/test_data/std/jdk/internal/foreign/layout/MemoryLayoutUtil.class
new file mode 100644
index 0000000000000000000000000000000000000000..58b856d49c35c407d17735edb0f6a2b671c58eec
GIT binary patch
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Dw)VsK

literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/foreign/layout/MemoryLayoutUtil.java b/tests/test_data/std/jdk/internal/foreign/layout/MemoryLayoutUtil.java
new file mode 100644
index 00000000..6b8e7738
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/foreign/layout/MemoryLayoutUtil.java
@@ -0,0 +1,40 @@
+/*
+ *  Copyright (c) 2019, 2023, Oracle and/or its affiliates. All rights reserved.
+ *  DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ *  This code is free software; you can redistribute it and/or modify it
+ *  under the terms of the GNU General Public License version 2 only, as
+ *  published by the Free Software Foundation.  Oracle designates this
+ *  particular file as subject to the "Classpath" exception as provided
+ *  by Oracle in the LICENSE file that accompanied this code.
+ *
+ *  This code is distributed in the hope that it will be useful, but WITHOUT
+ *  ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ *  FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ *  version 2 for more details (a copy is included in the LICENSE file that
+ *  accompanied this code).
+ *
+ *  You should have received a copy of the GNU General Public License version
+ *  2 along with this work; if not, write to the Free Software Foundation,
+ *  Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ *   Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ *  or visit www.oracle.com if you need additional information or have any
+ *  questions.
+ *
+ */
+package jdk.internal.foreign.layout;
+
+public final class MemoryLayoutUtil {
+
+    private MemoryLayoutUtil() {
+    }
+
+    public static long requireByteSizeValid(long byteSize, boolean allowZero) {
+        if ((byteSize == 0 && !allowZero) || byteSize < 0) {
+            throw new IllegalArgumentException("Invalid byte size: " + byteSize);
+        }
+        return byteSize;
+    }
+
+}
\ No newline at end of file
diff --git a/tests/test_data/std/jdk/internal/foreign/layout/PaddingLayoutImpl.class b/tests/test_data/std/jdk/internal/foreign/layout/PaddingLayoutImpl.class
new file mode 100644
index 0000000000000000000000000000000000000000..76e53d3b3ba9f85c1ad958a88a8dc06dc32ea68d
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/foreign/layout/PaddingLayoutImpl.java b/tests/test_data/std/jdk/internal/foreign/layout/PaddingLayoutImpl.java
new file mode 100644
index 00000000..63973e1c
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/foreign/layout/PaddingLayoutImpl.java
@@ -0,0 +1,74 @@
+/*
+ *  Copyright (c) 2019, 2023, Oracle and/or its affiliates. All rights reserved.
+ *  DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ *  This code is free software; you can redistribute it and/or modify it
+ *  under the terms of the GNU General Public License version 2 only, as
+ *  published by the Free Software Foundation.  Oracle designates this
+ *  particular file as subject to the "Classpath" exception as provided
+ *  by Oracle in the LICENSE file that accompanied this code.
+ *
+ *  This code is distributed in the hope that it will be useful, but WITHOUT
+ *  ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ *  FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ *  version 2 for more details (a copy is included in the LICENSE file that
+ *  accompanied this code).
+ *
+ *  You should have received a copy of the GNU General Public License version
+ *  2 along with this work; if not, write to the Free Software Foundation,
+ *  Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ *   Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ *  or visit www.oracle.com if you need additional information or have any
+ *  questions.
+ *
+ */
+package jdk.internal.foreign.layout;
+
+import java.lang.foreign.PaddingLayout;
+import java.util.Objects;
+import java.util.Optional;
+
+public final class PaddingLayoutImpl extends AbstractLayout<PaddingLayoutImpl> implements PaddingLayout {
+
+    private PaddingLayoutImpl(long byteSize) {
+        this(byteSize, 1, Optional.empty());
+    }
+
+    private PaddingLayoutImpl(long byteSize, long byteAlignment, Optional<String> name) {
+        super(byteSize, byteAlignment, name);
+    }
+
+    @Override
+    public String toString() {
+        return decorateLayoutString("x" + byteSize());
+    }
+
+    @Override
+    public boolean equals(Object other) {
+        return this == other ||
+                other instanceof PaddingLayoutImpl otherPadding &&
+                super.equals(other) &&
+                byteSize() == otherPadding.byteSize();
+    }
+
+    @Override
+    public int hashCode() {
+        return Objects.hash(super.hashCode(), byteSize());
+    }
+
+    @Override
+    PaddingLayoutImpl dup(long byteAlignment, Optional<String> name) {
+        return new PaddingLayoutImpl(byteSize(), byteAlignment, name);
+    }
+
+    @Override
+    public boolean hasNaturalAlignment() {
+        return true;
+    }
+
+    public static PaddingLayout of(long byteSize) {
+        return new PaddingLayoutImpl(byteSize);
+    }
+
+}
diff --git a/tests/test_data/std/jdk/internal/foreign/layout/SequenceLayoutImpl.class b/tests/test_data/std/jdk/internal/foreign/layout/SequenceLayoutImpl.class
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diff --git a/tests/test_data/std/jdk/internal/foreign/layout/SequenceLayoutImpl.java b/tests/test_data/std/jdk/internal/foreign/layout/SequenceLayoutImpl.java
new file mode 100644
index 00000000..16cffdad
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/foreign/layout/SequenceLayoutImpl.java
@@ -0,0 +1,223 @@
+/*
+ *  Copyright (c) 2019, 2023, Oracle and/or its affiliates. All rights reserved.
+ *  DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ *  This code is free software; you can redistribute it and/or modify it
+ *  under the terms of the GNU General Public License version 2 only, as
+ *  published by the Free Software Foundation.  Oracle designates this
+ *  particular file as subject to the "Classpath" exception as provided
+ *  by Oracle in the LICENSE file that accompanied this code.
+ *
+ *  This code is distributed in the hope that it will be useful, but WITHOUT
+ *  ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ *  FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ *  version 2 for more details (a copy is included in the LICENSE file that
+ *  accompanied this code).
+ *
+ *  You should have received a copy of the GNU General Public License version
+ *  2 along with this work; if not, write to the Free Software Foundation,
+ *  Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ *   Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ *  or visit www.oracle.com if you need additional information or have any
+ *  questions.
+ *
+ */
+package jdk.internal.foreign.layout;
+
+import jdk.internal.foreign.Utils;
+
+import java.lang.foreign.MemoryLayout;
+import java.lang.foreign.SequenceLayout;
+import java.util.Objects;
+import java.util.Optional;
+
+public final class SequenceLayoutImpl extends AbstractLayout<SequenceLayoutImpl> implements SequenceLayout {
+
+    private final long elemCount;
+    private final MemoryLayout elementLayout;
+
+    private SequenceLayoutImpl(long elemCount, MemoryLayout elementLayout) {
+        this(elemCount, elementLayout, elementLayout.byteAlignment(), Optional.empty());
+    }
+
+    private SequenceLayoutImpl(long elemCount, MemoryLayout elementLayout, long byteAlignment, Optional<String> name) {
+        super(Math.multiplyExact(elemCount, elementLayout.byteSize()), byteAlignment, name);
+        this.elemCount = elemCount;
+        this.elementLayout = elementLayout;
+    }
+
+    /**
+     * {@return the element layout associated with this sequence layout}
+     */
+    public MemoryLayout elementLayout() {
+        return elementLayout;
+    }
+
+    /**
+     * {@return the element count of this sequence layout}
+     */
+    public long elementCount() {
+        return elemCount;
+    }
+
+    /**
+     * Returns a sequence layout with the same element layout, alignment constraints and name as this sequence layout,
+     * but with the specified element count.
+     *
+     * @param elementCount the new element count.
+     * @return a sequence layout with the given element count.
+     * @throws IllegalArgumentException if {@code elementCount < 0}.
+     */
+    public SequenceLayout withElementCount(long elementCount) {
+        return Utils.wrapOverflow(() ->
+                new SequenceLayoutImpl(elementCount, elementLayout, byteAlignment(), name()));
+    }
+
+    /**
+     * Re-arrange the elements in this sequence layout into a multi-dimensional sequence layout.
+     * The resulting layout is a sequence layout where element layouts in the flattened projection of this
+     * sequence layout (see {@link #flatten()}) are re-arranged into one or more nested sequence layouts
+     * according to the provided element counts. This transformation preserves the layout size;
+     * that is, multiplying the provided element counts must yield the same element count
+     * as the flattened projection of this sequence layout.
+     * <p>
+     * For instance, given a sequence layout of the kind:
+     * {@snippet lang = java:
+     * var seq = MemoryLayout.sequenceLayout(4, MemoryLayout.sequenceLayout(3, ValueLayout.JAVA_INT));
+     *}
+     * calling {@code seq.reshape(2, 6)} will yield the following sequence layout:
+     * {@snippet lang = java:
+     * var reshapeSeq = MemoryLayout.sequenceLayout(2, MemoryLayout.sequenceLayout(6, ValueLayout.JAVA_INT));
+     *}
+     * <p>
+     * If one of the provided element count is the special value {@code -1}, then the element
+     * count in that position will be inferred from the remaining element counts and the
+     * element count of the flattened projection of this layout. For instance, a layout equivalent to
+     * the above {@code reshapeSeq} can also be computed in the following ways:
+     * {@snippet lang = java:
+     * var reshapeSeqImplicit1 = seq.reshape(-1, 6);
+     * var reshapeSeqImplicit2 = seq.reshape(2, -1);
+     *}
+     *
+     * @param elementCounts an array of element counts, of which at most one can be {@code -1}.
+     * @return a sequence layout where element layouts in the flattened projection of this
+     * sequence layout (see {@link #flatten()}) are re-arranged into one or more nested sequence layouts.
+     * @throws IllegalArgumentException if two or more element counts are set to {@code -1}, or if one
+     *                                  or more element count is {@code <= 0} (but other than {@code -1}) or, if, after any required inference,
+     *                                  multiplying the element counts does not yield the same element count as the flattened projection of this
+     *                                  sequence layout.
+     */
+    public SequenceLayout reshape(long... elementCounts) {
+        Objects.requireNonNull(elementCounts);
+        if (elementCounts.length == 0) {
+            throw new IllegalArgumentException();
+        }
+        SequenceLayout flat = flatten();
+        long expectedCount = flat.elementCount();
+
+        long actualCount = 1;
+        int inferPosition = -1;
+        for (int i = 0; i < elementCounts.length; i++) {
+            if (elementCounts[i] == -1) {
+                if (inferPosition == -1) {
+                    inferPosition = i;
+                } else {
+                    throw new IllegalArgumentException("Too many unspecified element counts");
+                }
+            } else if (elementCounts[i] <= 0) {
+                throw new IllegalArgumentException("Invalid element count: " + elementCounts[i]);
+            } else {
+                actualCount = elementCounts[i] * actualCount;
+            }
+        }
+
+        // infer an unspecified element count (if any)
+        if (inferPosition != -1) {
+            long inferredCount = expectedCount / actualCount;
+            elementCounts[inferPosition] = inferredCount;
+            actualCount = actualCount * inferredCount;
+        }
+
+        if (actualCount != expectedCount) {
+            throw new IllegalArgumentException("Element counts do not match expected size: " + expectedCount);
+        }
+
+        MemoryLayout res = flat.elementLayout();
+        for (int i = elementCounts.length - 1; i >= 0; i--) {
+            res = MemoryLayout.sequenceLayout(elementCounts[i], res);
+        }
+        return (SequenceLayoutImpl) res;
+    }
+
+    /**
+     * Returns a flattened sequence layout. The element layout of the returned sequence layout
+     * is the first non-sequence element layout found by recursively traversing the element layouts of this sequence layout.
+     * This transformation preserves the layout size; nested sequence layout in this sequence layout will
+     * be dropped and their element counts will be incorporated into that of the returned sequence layout.
+     * For instance, given a sequence layout of the kind:
+     * {@snippet lang = java:
+     * var seq = MemoryLayout.sequenceLayout(4, MemoryLayout.sequenceLayout(3, ValueLayout.JAVA_INT));
+     *}
+     * calling {@code seq.flatten()} will yield the following sequence layout:
+     * {@snippet lang = java:
+     * var flattenedSeq = MemoryLayout.sequenceLayout(12, ValueLayout.JAVA_INT);
+     *}
+     *
+     * @return a sequence layout with the same size as this layout (but, possibly, with different
+     * element count), whose element layout is not a sequence layout.
+     */
+    public SequenceLayout flatten() {
+        long count = elementCount();
+        MemoryLayout elemLayout = elementLayout();
+        while (elemLayout instanceof SequenceLayoutImpl elemSeq) {
+            count = count * elemSeq.elementCount();
+            elemLayout = elemSeq.elementLayout();
+        }
+        return MemoryLayout.sequenceLayout(count, elemLayout);
+    }
+
+    @Override
+    public String toString() {
+        boolean max = (Long.MAX_VALUE / Math.max(1, elementLayout.byteSize())) == elemCount;
+        return decorateLayoutString(String.format("[%s:%s]",
+                max ? "*" : elemCount, elementLayout));
+    }
+
+    @Override
+    public boolean equals(Object other) {
+        return this == other ||
+                other instanceof SequenceLayoutImpl otherSeq &&
+                        super.equals(other) &&
+                        elemCount == otherSeq.elemCount &&
+                        elementLayout.equals(otherSeq.elementLayout);
+    }
+
+    @Override
+    public int hashCode() {
+        return Objects.hash(super.hashCode(), elemCount, elementLayout);
+    }
+
+    @Override
+    SequenceLayoutImpl dup(long byteAlignment, Optional<String> name) {
+        return new SequenceLayoutImpl(elementCount(), elementLayout, byteAlignment, name);
+    }
+
+    @Override
+    public SequenceLayoutImpl withByteAlignment(long byteAlignment) {
+        if (byteAlignment < elementLayout.byteAlignment()) {
+            throw new IllegalArgumentException("Invalid alignment constraint");
+        }
+        return super.withByteAlignment(byteAlignment);
+    }
+
+    @Override
+    public boolean hasNaturalAlignment() {
+        return byteAlignment() == elementLayout.byteAlignment();
+    }
+
+    public static SequenceLayout of(long elementCount, MemoryLayout elementLayout) {
+        return new SequenceLayoutImpl(elementCount, elementLayout);
+    }
+
+}
diff --git a/tests/test_data/std/jdk/internal/foreign/layout/StructLayoutImpl.class b/tests/test_data/std/jdk/internal/foreign/layout/StructLayoutImpl.class
new file mode 100644
index 0000000000000000000000000000000000000000..f843e6f73b95d6646abb7c5375882328eb10ba56
GIT binary patch
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HXK4R_^ABPB

literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/foreign/layout/StructLayoutImpl.java b/tests/test_data/std/jdk/internal/foreign/layout/StructLayoutImpl.java
new file mode 100644
index 00000000..9da6594e
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/foreign/layout/StructLayoutImpl.java
@@ -0,0 +1,57 @@
+/*
+ *  Copyright (c) 2019, 2022, Oracle and/or its affiliates. All rights reserved.
+ *  DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ *  This code is free software; you can redistribute it and/or modify it
+ *  under the terms of the GNU General Public License version 2 only, as
+ *  published by the Free Software Foundation.  Oracle designates this
+ *  particular file as subject to the "Classpath" exception as provided
+ *  by Oracle in the LICENSE file that accompanied this code.
+ *
+ *  This code is distributed in the hope that it will be useful, but WITHOUT
+ *  ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ *  FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ *  version 2 for more details (a copy is included in the LICENSE file that
+ *  accompanied this code).
+ *
+ *  You should have received a copy of the GNU General Public License version
+ *  2 along with this work; if not, write to the Free Software Foundation,
+ *  Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ *   Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ *  or visit www.oracle.com if you need additional information or have any
+ *  questions.
+ *
+ */
+package jdk.internal.foreign.layout;
+
+import java.lang.foreign.MemoryLayout;
+import java.lang.foreign.StructLayout;
+import java.util.List;
+import java.util.Optional;
+
+public final class StructLayoutImpl extends AbstractGroupLayout<StructLayoutImpl> implements StructLayout {
+
+    private StructLayoutImpl(List<MemoryLayout> elements, long byteSize, long byteAlignment, long minByteAlignment, Optional<String> name) {
+        super(Kind.STRUCT, elements, byteSize, byteAlignment, minByteAlignment, name);
+    }
+
+    @Override
+    StructLayoutImpl dup(long byteAlignment, Optional<String> name) {
+        return new StructLayoutImpl(memberLayouts(), byteSize(), byteAlignment, minByteAlignment, name);
+    }
+
+    public static StructLayout of(List<MemoryLayout> elements) {
+        long size = 0;
+        long align = 1;
+        for (MemoryLayout elem : elements) {
+            if (size % elem.byteAlignment() != 0) {
+                throw new IllegalArgumentException("Invalid alignment constraint for member layout: " + elem);
+            }
+            size = Math.addExact(size, elem.byteSize());
+            align = Math.max(align, elem.byteAlignment());
+        }
+        return new StructLayoutImpl(elements, size, align, align, Optional.empty());
+    }
+
+}
diff --git a/tests/test_data/std/jdk/internal/foreign/layout/UnionLayoutImpl.class b/tests/test_data/std/jdk/internal/foreign/layout/UnionLayoutImpl.class
new file mode 100644
index 0000000000000000000000000000000000000000..f513eb79da899c87bec6a8783695ba287e98d70e
GIT binary patch
literal 3987
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z&;0oB-wJqdfBy?ixQK&F*;6X^F!vfE!z8bB=QtY01n)+dFs7I!xH5p_FsXyoJ)_i?
zNYhxSvdl2Ey1|i`leD@|Ym2`w1YScA1~r`hhZ`(&DuB)Cw7l}TG|$ml3KmNAZevPH
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hUM&N>$%~b@%xnkn7*EvuDYp2I5M6+M>e<xs{{WX+(PjVu

literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/foreign/layout/UnionLayoutImpl.java b/tests/test_data/std/jdk/internal/foreign/layout/UnionLayoutImpl.java
new file mode 100644
index 00000000..544ca838
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/foreign/layout/UnionLayoutImpl.java
@@ -0,0 +1,54 @@
+/*
+ *  Copyright (c) 2019, 2022, Oracle and/or its affiliates. All rights reserved.
+ *  DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ *  This code is free software; you can redistribute it and/or modify it
+ *  under the terms of the GNU General Public License version 2 only, as
+ *  published by the Free Software Foundation.  Oracle designates this
+ *  particular file as subject to the "Classpath" exception as provided
+ *  by Oracle in the LICENSE file that accompanied this code.
+ *
+ *  This code is distributed in the hope that it will be useful, but WITHOUT
+ *  ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ *  FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ *  version 2 for more details (a copy is included in the LICENSE file that
+ *  accompanied this code).
+ *
+ *  You should have received a copy of the GNU General Public License version
+ *  2 along with this work; if not, write to the Free Software Foundation,
+ *  Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ *   Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ *  or visit www.oracle.com if you need additional information or have any
+ *  questions.
+ *
+ */
+package jdk.internal.foreign.layout;
+
+import java.lang.foreign.MemoryLayout;
+import java.lang.foreign.UnionLayout;
+import java.util.List;
+import java.util.Optional;
+
+public final class UnionLayoutImpl extends AbstractGroupLayout<UnionLayoutImpl> implements UnionLayout {
+
+    private UnionLayoutImpl(List<MemoryLayout> elements, long byteSize, long byteAlignment, long minByteAlignment, Optional<String> name) {
+        super(Kind.UNION, elements, byteSize, byteAlignment, minByteAlignment, name);
+    }
+
+    @Override
+    UnionLayoutImpl dup(long byteAlignment, Optional<String> name) {
+        return new UnionLayoutImpl(memberLayouts(), byteSize(), byteAlignment, minByteAlignment, name);
+    }
+
+    public static UnionLayout of(List<MemoryLayout> elements) {
+        long size = 0;
+        long align = 1;
+        for (MemoryLayout elem : elements) {
+            size = Math.max(size, elem.byteSize());
+            align = Math.max(align, elem.byteAlignment());
+        }
+        return new UnionLayoutImpl(elements, size, align, align, Optional.empty());
+    }
+
+}
diff --git a/tests/test_data/std/jdk/internal/foreign/layout/ValueLayouts$AbstractValueLayout$1VarHandleCache.class b/tests/test_data/std/jdk/internal/foreign/layout/ValueLayouts$AbstractValueLayout$1VarHandleCache.class
new file mode 100644
index 0000000000000000000000000000000000000000..e7eb7f846d9022cb8ea79f0c6be26e6b8c729b8f
GIT binary patch
literal 1158
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/foreign/layout/ValueLayouts$AbstractValueLayout.class b/tests/test_data/std/jdk/internal/foreign/layout/ValueLayouts$AbstractValueLayout.class
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GIT binary patch
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HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/foreign/layout/ValueLayouts$OfAddressImpl.class b/tests/test_data/std/jdk/internal/foreign/layout/ValueLayouts$OfAddressImpl.class
new file mode 100644
index 0000000000000000000000000000000000000000..d276401d850fbd87006d41dc37b95f45e2695b59
GIT binary patch
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diff --git a/tests/test_data/std/jdk/internal/foreign/layout/ValueLayouts$OfBooleanImpl.class b/tests/test_data/std/jdk/internal/foreign/layout/ValueLayouts$OfBooleanImpl.class
new file mode 100644
index 0000000000000000000000000000000000000000..505a4cfedb422468da13adf383bb03f6ae4f2079
GIT binary patch
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diff --git a/tests/test_data/std/jdk/internal/foreign/layout/ValueLayouts$OfByteImpl.class b/tests/test_data/std/jdk/internal/foreign/layout/ValueLayouts$OfByteImpl.class
new file mode 100644
index 0000000000000000000000000000000000000000..7ad36f058207b819c35d07a90e697d1d44555dc0
GIT binary patch
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diff --git a/tests/test_data/std/jdk/internal/foreign/layout/ValueLayouts$OfCharImpl.class b/tests/test_data/std/jdk/internal/foreign/layout/ValueLayouts$OfCharImpl.class
new file mode 100644
index 0000000000000000000000000000000000000000..f1fa261e9f8da6b368da2ecd905712e3f0608184
GIT binary patch
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HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/foreign/layout/ValueLayouts$OfDoubleImpl.class b/tests/test_data/std/jdk/internal/foreign/layout/ValueLayouts$OfDoubleImpl.class
new file mode 100644
index 0000000000000000000000000000000000000000..96708ef75521ec0ec0ec3d58bc8f7f5779ff9b54
GIT binary patch
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diff --git a/tests/test_data/std/jdk/internal/foreign/layout/ValueLayouts$OfFloatImpl.class b/tests/test_data/std/jdk/internal/foreign/layout/ValueLayouts$OfFloatImpl.class
new file mode 100644
index 0000000000000000000000000000000000000000..5115f7f94d166979118b14fe9beb8e5aa86ab4d6
GIT binary patch
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diff --git a/tests/test_data/std/jdk/internal/foreign/layout/ValueLayouts$OfIntImpl.class b/tests/test_data/std/jdk/internal/foreign/layout/ValueLayouts$OfIntImpl.class
new file mode 100644
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GIT binary patch
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diff --git a/tests/test_data/std/jdk/internal/foreign/layout/ValueLayouts$OfLongImpl.class b/tests/test_data/std/jdk/internal/foreign/layout/ValueLayouts$OfLongImpl.class
new file mode 100644
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GIT binary patch
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diff --git a/tests/test_data/std/jdk/internal/foreign/layout/ValueLayouts$OfShortImpl.class b/tests/test_data/std/jdk/internal/foreign/layout/ValueLayouts$OfShortImpl.class
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GIT binary patch
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diff --git a/tests/test_data/std/jdk/internal/foreign/layout/ValueLayouts.class b/tests/test_data/std/jdk/internal/foreign/layout/ValueLayouts.class
new file mode 100644
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GIT binary patch
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diff --git a/tests/test_data/std/jdk/internal/foreign/layout/ValueLayouts.java b/tests/test_data/std/jdk/internal/foreign/layout/ValueLayouts.java
new file mode 100644
index 00000000..4d19879b
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/foreign/layout/ValueLayouts.java
@@ -0,0 +1,412 @@
+/*
+ *  Copyright (c) 2019, 2024, Oracle and/or its affiliates. All rights reserved.
+ *  DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ *  This code is free software; you can redistribute it and/or modify it
+ *  under the terms of the GNU General Public License version 2 only, as
+ *  published by the Free Software Foundation.  Oracle designates this
+ *  particular file as subject to the "Classpath" exception as provided
+ *  by Oracle in the LICENSE file that accompanied this code.
+ *
+ *  This code is distributed in the hope that it will be useful, but WITHOUT
+ *  ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ *  FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ *  version 2 for more details (a copy is included in the LICENSE file that
+ *  accompanied this code).
+ *
+ *  You should have received a copy of the GNU General Public License version
+ *  2 along with this work; if not, write to the Free Software Foundation,
+ *  Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ *   Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ *  or visit www.oracle.com if you need additional information or have any
+ *  questions.
+ *
+ */
+package jdk.internal.foreign.layout;
+
+import jdk.internal.foreign.Utils;
+import jdk.internal.misc.Unsafe;
+import jdk.internal.reflect.CallerSensitive;
+import jdk.internal.reflect.Reflection;
+import jdk.internal.vm.annotation.ForceInline;
+import jdk.internal.vm.annotation.Stable;
+
+import java.lang.foreign.AddressLayout;
+import java.lang.foreign.MemoryLayout;
+import java.lang.foreign.MemorySegment;
+import java.lang.foreign.ValueLayout;
+import java.lang.invoke.VarHandle;
+import java.nio.ByteOrder;
+import java.util.Map;
+import java.util.Objects;
+import java.util.Optional;
+import java.util.concurrent.ConcurrentHashMap;
+
+/**
+ * A value layout. A value layout is used to model the memory layout associated with values of basic data types, such as <em>integral</em> types
+ * (either signed or unsigned) and <em>floating-point</em> types. Each value layout has a size, an alignment (expressed in bytes),
+ * a {@linkplain ByteOrder byte order}, and a <em>carrier</em>, that is, the Java type that should be used when
+ * {@linkplain MemorySegment#get(ValueLayout.OfInt, long) accessing} a memory region using the value layout.
+ * <p>
+ * This class defines useful value layout constants for Java primitive types and addresses.
+ * The layout constants in this class make implicit alignment and byte-ordering assumption: all layout
+ * constants in this class are byte-aligned, and their byte order is set to the {@linkplain ByteOrder#nativeOrder() platform default},
+ * thus making it easy to work with other APIs, such as arrays and {@link java.nio.ByteBuffer}.
+ *
+ * @implSpec This class and its subclasses are immutable, thread-safe and <a href="{@docRoot}/java.base/java/lang/doc-files/ValueBased.html">value-based</a>.
+ */
+public final class ValueLayouts {
+
+    // Suppresses default constructor, ensuring non-instantiability.
+    private ValueLayouts() {}
+
+    abstract static sealed class AbstractValueLayout<V extends AbstractValueLayout<V> & ValueLayout> extends AbstractLayout<V> {
+
+        static final int ADDRESS_SIZE_BYTES = Unsafe.ADDRESS_SIZE;
+
+        private final Class<?> carrier;
+        private final ByteOrder order;
+        @Stable
+        private VarHandle handle;
+
+        AbstractValueLayout(Class<?> carrier, ByteOrder order, long byteSize, long byteAlignment, Optional<String> name) {
+            super(byteSize, byteAlignment, name);
+            this.carrier = carrier;
+            this.order = order;
+            assertCarrierSize(carrier, byteSize);
+        }
+
+        /**
+         * {@return the value's byte order}
+         */
+        public final ByteOrder order() {
+            return order;
+        }
+
+        /**
+         * Returns a value layout with the same carrier, alignment constraints and name as this value layout,
+         * but with the specified byte order.
+         *
+         * @param order the desired byte order.
+         * @return a value layout with the given byte order.
+         */
+        public final V withOrder(ByteOrder order) {
+            Objects.requireNonNull(order);
+            return dup(order, byteAlignment(), name());
+        }
+
+        @Override
+        public String toString() {
+            char descriptor = carrier.descriptorString().charAt(0);
+            if (order == ByteOrder.LITTLE_ENDIAN) {
+                descriptor = Character.toLowerCase(descriptor);
+            }
+            return decorateLayoutString(String.format("%s%d", descriptor, byteSize()));
+        }
+
+        @Override
+        public boolean equals(Object other) {
+            return this == other ||
+                    other instanceof AbstractValueLayout<?> otherValue &&
+                            super.equals(other) &&
+                            carrier.equals(otherValue.carrier) &&
+                            order.equals(otherValue.order);
+        }
+
+        /**
+         * {@return the carrier associated with this value layout}
+         */
+        public final Class<?> carrier() {
+            return carrier;
+        }
+
+        @Override
+        public int hashCode() {
+            return Objects.hash(super.hashCode(), order, carrier);
+        }
+
+        @Override
+        final V dup(long byteAlignment, Optional<String> name) {
+            return dup(order(), byteAlignment, name);
+        }
+
+        abstract V dup(ByteOrder order, long byteAlignment, Optional<String> name);
+
+        static void assertCarrierSize(Class<?> carrier, long byteSize) {
+            assert isValidCarrier(carrier);
+            assert carrier != MemorySegment.class
+                    // MemorySegment byteSize must always equal ADDRESS_SIZE_BYTES
+                    || byteSize == ADDRESS_SIZE_BYTES;
+            assert !carrier.isPrimitive() ||
+                    // Primitive class byteSize must always correspond
+                    byteSize == (carrier == boolean.class ? 1 :
+                            Utils.byteWidthOfPrimitive(carrier));
+        }
+
+        static boolean isValidCarrier(Class<?> carrier) {
+            // void.class is not valid
+            return carrier == boolean.class
+                    || carrier == byte.class
+                    || carrier == short.class
+                    || carrier == char.class
+                    || carrier == int.class
+                    || carrier == long.class
+                    || carrier == float.class
+                    || carrier == double.class
+                    || carrier == MemorySegment.class;
+        }
+
+        @ForceInline
+        public final VarHandle varHandle() {
+            final class VarHandleCache {
+                private static final Map<ValueLayout, VarHandle> HANDLE_MAP = new ConcurrentHashMap<>();
+            }
+            if (handle == null) {
+                // this store to stable field is safe, because return value of 'makeMemoryAccessVarHandle' has stable identity
+                handle = VarHandleCache.HANDLE_MAP.computeIfAbsent(self().withoutName(), _ -> varHandleInternal());
+            }
+            return handle;
+        }
+
+        @SuppressWarnings("unchecked")
+        final V self() {
+            return (V) this;
+        }
+    }
+
+    public static final class OfBooleanImpl extends AbstractValueLayout<OfBooleanImpl> implements ValueLayout.OfBoolean {
+
+        private OfBooleanImpl(ByteOrder order, long byteAlignment, Optional<String> name) {
+            super(boolean.class, order, Byte.BYTES, byteAlignment, name);
+        }
+
+        @Override
+        OfBooleanImpl dup(ByteOrder order, long byteAlignment, Optional<String> name) {
+            return new OfBooleanImpl(order, byteAlignment, name);
+        }
+
+        public static OfBoolean of(ByteOrder order) {
+            return new OfBooleanImpl(order, Byte.BYTES, Optional.empty());
+        }
+    }
+
+    public static final class OfByteImpl extends AbstractValueLayout<OfByteImpl> implements ValueLayout.OfByte {
+
+        private OfByteImpl(ByteOrder order, long byteAlignment, Optional<String> name) {
+            super(byte.class, order, Byte.BYTES, byteAlignment, name);
+        }
+
+        @Override
+        OfByteImpl dup(ByteOrder order, long byteAlignment, Optional<String> name) {
+            return new OfByteImpl(order, byteAlignment, name);
+        }
+
+        public static OfByte of(ByteOrder order) {
+            return new OfByteImpl(order, Byte.BYTES, Optional.empty());
+        }
+    }
+
+    public static final class OfCharImpl extends AbstractValueLayout<OfCharImpl> implements ValueLayout.OfChar {
+
+        private OfCharImpl(ByteOrder order, long byteAlignment, Optional<String> name) {
+            super(char.class, order, Character.BYTES, byteAlignment, name);
+        }
+
+        @Override
+        OfCharImpl dup(ByteOrder order, long byteAlignment, Optional<String> name) {
+            return new OfCharImpl(order, byteAlignment, name);
+        }
+
+        public static OfChar of(ByteOrder order) {
+            return new OfCharImpl(order, Character.BYTES, Optional.empty());
+        }
+    }
+
+    public static final class OfShortImpl extends AbstractValueLayout<OfShortImpl> implements ValueLayout.OfShort {
+
+        private OfShortImpl(ByteOrder order, long byteAlignment, Optional<String> name) {
+            super(short.class, order, Short.BYTES, byteAlignment, name);
+        }
+
+        @Override
+        OfShortImpl dup(ByteOrder order, long byteAlignment, Optional<String> name) {
+            return new OfShortImpl(order, byteAlignment, name);
+        }
+
+        public static OfShort of(ByteOrder order) {
+            return new OfShortImpl(order, Short.BYTES, Optional.empty());
+        }
+    }
+
+    public static final class OfIntImpl extends AbstractValueLayout<OfIntImpl> implements ValueLayout.OfInt {
+
+        private OfIntImpl(ByteOrder order, long byteAlignment, Optional<String> name) {
+            super(int.class, order, Integer.BYTES, byteAlignment, name);
+        }
+
+        @Override
+        OfIntImpl dup(ByteOrder order, long byteAlignment, Optional<String> name) {
+            return new OfIntImpl(order, byteAlignment, name);
+        }
+
+        public static OfInt of(ByteOrder order) {
+            return new OfIntImpl(order, Integer.BYTES, Optional.empty());
+        }
+    }
+
+    public static final class OfFloatImpl extends AbstractValueLayout<OfFloatImpl> implements ValueLayout.OfFloat {
+
+        private OfFloatImpl(ByteOrder order, long byteAlignment, Optional<String> name) {
+            super(float.class, order, Float.BYTES, byteAlignment, name);
+        }
+
+        @Override
+        OfFloatImpl dup(ByteOrder order, long byteAlignment, Optional<String> name) {
+            return new OfFloatImpl(order, byteAlignment, name);
+        }
+
+        public static OfFloat of(ByteOrder order) {
+            return new OfFloatImpl(order, Float.BYTES, Optional.empty());
+        }
+    }
+
+    public static final class OfLongImpl extends AbstractValueLayout<OfLongImpl> implements ValueLayout.OfLong {
+
+        private OfLongImpl(ByteOrder order, long byteAlignment, Optional<String> name) {
+            super(long.class, order, Long.BYTES, byteAlignment, name);
+        }
+
+        @Override
+        OfLongImpl dup(ByteOrder order, long byteAlignment, Optional<String> name) {
+            return new OfLongImpl(order, byteAlignment, name);
+        }
+
+        public static OfLong of(ByteOrder order) {
+            return new OfLongImpl(order, Long.BYTES, Optional.empty());
+        }
+    }
+
+    public static final class OfDoubleImpl extends AbstractValueLayout<OfDoubleImpl> implements ValueLayout.OfDouble {
+
+        private OfDoubleImpl(ByteOrder order, long byteAlignment, Optional<String> name) {
+            super(double.class, order, Double.BYTES, byteAlignment, name);
+        }
+
+        @Override
+        OfDoubleImpl dup(ByteOrder order, long byteAlignment, Optional<String> name) {
+            return new OfDoubleImpl(order, byteAlignment, name);
+        }
+
+        public static OfDouble of(ByteOrder order) {
+            return new OfDoubleImpl(order, Double.BYTES, Optional.empty());
+        }
+
+    }
+
+    public static final class OfAddressImpl extends AbstractValueLayout<OfAddressImpl> implements AddressLayout {
+
+        private final MemoryLayout targetLayout;
+
+        private OfAddressImpl(ByteOrder order, long byteSize, long byteAlignment, MemoryLayout targetLayout, Optional<String> name) {
+            super(MemorySegment.class, order, byteSize, byteAlignment, name);
+            this.targetLayout = targetLayout;
+        }
+
+        @Override
+        OfAddressImpl dup(ByteOrder order, long byteAlignment, Optional<String> name) {
+            return new OfAddressImpl(order, byteSize(), byteAlignment,targetLayout, name);
+        }
+
+        @Override
+        public boolean equals(Object other) {
+            return super.equals(other) &&
+                    Objects.equals(((OfAddressImpl)other).targetLayout, this.targetLayout);
+        }
+
+        @Override
+        public int hashCode() {
+            return Objects.hash(super.hashCode(), targetLayout);
+        }
+
+        @Override
+        @CallerSensitive
+        public AddressLayout withTargetLayout(MemoryLayout layout) {
+            Reflection.ensureNativeAccess(Reflection.getCallerClass(), AddressLayout.class, "withTargetLayout");
+            Objects.requireNonNull(layout);
+            return new OfAddressImpl(order(), byteSize(), byteAlignment(), layout, name());
+        }
+
+        @Override
+        public AddressLayout withoutTargetLayout() {
+            return new OfAddressImpl(order(), byteSize(), byteAlignment(), null, name());
+        }
+
+        @Override
+        public Optional<MemoryLayout> targetLayout() {
+            return Optional.ofNullable(targetLayout);
+        }
+
+        public static AddressLayout of(ByteOrder order) {
+            return new OfAddressImpl(order, ADDRESS_SIZE_BYTES, ADDRESS_SIZE_BYTES, null, Optional.empty());
+        }
+
+        @Override
+        public String toString() {
+            char descriptor = 'A';
+            if (order() == ByteOrder.LITTLE_ENDIAN) {
+                descriptor = Character.toLowerCase(descriptor);
+            }
+            String str = decorateLayoutString(String.format("%s%d", descriptor, byteSize()));
+            if (targetLayout != null) {
+                str += ":" + targetLayout;
+            }
+            return str;
+        }
+    }
+
+    /**
+     * Creates a value layout of given Java carrier and byte order. The type of resulting value layout is determined
+     * by the carrier provided:
+     * <ul>
+     *     <li>{@link ValueLayout.OfBoolean}, for {@code boolean.class}</li>
+     *     <li>{@link ValueLayout.OfByte}, for {@code byte.class}</li>
+     *     <li>{@link ValueLayout.OfShort}, for {@code short.class}</li>
+     *     <li>{@link ValueLayout.OfChar}, for {@code char.class}</li>
+     *     <li>{@link ValueLayout.OfInt}, for {@code int.class}</li>
+     *     <li>{@link ValueLayout.OfFloat}, for {@code float.class}</li>
+     *     <li>{@link ValueLayout.OfLong}, for {@code long.class}</li>
+     *     <li>{@link ValueLayout.OfDouble}, for {@code double.class}</li>
+     *     <li>{@link AddressLayout}, for {@code MemorySegment.class}</li>
+     * </ul>
+     * @param carrier the value layout carrier.
+     * @param order the value layout's byte order.
+     * @return a value layout with the given Java carrier and byte-order.
+     * @throws IllegalArgumentException if the carrier type is not supported.
+     */
+    public static ValueLayout valueLayout(Class<?> carrier, ByteOrder order) {
+        Objects.requireNonNull(carrier);
+        Objects.requireNonNull(order);
+        if (carrier == boolean.class) {
+            return ValueLayouts.OfBooleanImpl.of(order);
+        } else if (carrier == char.class) {
+            return ValueLayouts.OfCharImpl.of(order);
+        } else if (carrier == byte.class) {
+            return ValueLayouts.OfByteImpl.of(order);
+        } else if (carrier == short.class) {
+            return ValueLayouts.OfShortImpl.of(order);
+        } else if (carrier == int.class) {
+            return ValueLayouts.OfIntImpl.of(order);
+        } else if (carrier == float.class) {
+            return ValueLayouts.OfFloatImpl.of(order);
+        } else if (carrier == long.class) {
+            return ValueLayouts.OfLongImpl.of(order);
+        } else if (carrier == double.class) {
+            return ValueLayouts.OfDoubleImpl.of(order);
+        } else if (carrier == MemorySegment.class) {
+            return ValueLayouts.OfAddressImpl.of(order);
+        } else {
+            throw new IllegalArgumentException("Unsupported carrier: " + carrier.getName());
+        }
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/icu/impl/BMPSet.class b/tests/test_data/std/jdk/internal/icu/impl/BMPSet.class
new file mode 100644
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HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/icu/impl/BMPSet.java b/tests/test_data/std/jdk/internal/icu/impl/BMPSet.java
new file mode 100644
index 00000000..e10bc3db
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/icu/impl/BMPSet.java
@@ -0,0 +1,527 @@
+/*
+ * Copyright (c) 2015, 2020, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/*
+ ******************************************************************************
+ *
+ *   Copyright (C) 2009-2014, International Business Machines
+ *   Corporation and others.  All Rights Reserved.
+ *
+ ******************************************************************************
+ */
+
+package jdk.internal.icu.impl;
+
+import jdk.internal.icu.text.UnicodeSet.SpanCondition;
+import jdk.internal.icu.util.OutputInt;
+
+/**
+ * Helper class for frozen UnicodeSets, implements contains() and span() optimized for BMP code points.
+ *
+ * Latin-1: Look up bytes.
+ * 2-byte characters: Bits organized vertically.
+ * 3-byte characters: Use zero/one/mixed data per 64-block in U+0000..U+FFFF, with mixed for illegal ranges.
+ * Supplementary characters: Call contains() on the parent set.
+ */
+public final class BMPSet {
+
+    /**
+     * One boolean ('true' or 'false') per Latin-1 character.
+     */
+    private boolean[] latin1Contains;
+
+    /**
+     * One bit per code point from U+0000..U+07FF. The bits are organized vertically; consecutive code points
+     * correspond to the same bit positions in consecutive table words. With code point parts lead=c{10..6}
+     * trail=c{5..0} it is set.contains(c)==(table7FF[trail] bit lead)
+     *
+     * Bits for 0..7F (non-shortest forms) are set to the result of contains(FFFD) for faster validity checking at
+     * runtime.
+     */
+    private int[] table7FF;
+
+    /**
+     * One bit per 64 BMP code points. The bits are organized vertically; consecutive 64-code point blocks
+     * correspond to the same bit position in consecutive table words. With code point parts lead=c{15..12}
+     * t1=c{11..6} test bits (lead+16) and lead in bmpBlockBits[t1]. If the upper bit is 0, then the lower bit
+     * indicates if contains(c) for all code points in the 64-block. If the upper bit is 1, then the block is mixed
+     * and set.contains(c) must be called.
+     *
+     * Bits for 0..7FF (non-shortest forms) and D800..DFFF are set to the result of contains(FFFD) for faster
+     * validity checking at runtime.
+     */
+    private int[] bmpBlockBits;
+
+    /**
+     * Inversion list indexes for restricted binary searches in findCodePoint(), from findCodePoint(U+0800, U+1000,
+     * U+2000, .., U+F000, U+10000). U+0800 is the first 3-byte-UTF-8 code point. Code points below U+0800 are
+     * always looked up in the bit tables. The last pair of indexes is for finding supplementary code points.
+     */
+    private int[] list4kStarts;
+
+    /**
+     * The inversion list of the parent set, for the slower contains() implementation for mixed BMP blocks and for
+     * supplementary code points. The list is terminated with list[listLength-1]=0x110000.
+     */
+    private final int[] list;
+    private final int listLength; // length used; list may be longer to minimize reallocs
+
+    public BMPSet(final int[] parentList, int parentListLength) {
+        list = parentList;
+        listLength = parentListLength;
+        latin1Contains = new boolean[0x100];
+        table7FF = new int[64];
+        bmpBlockBits = new int[64];
+        list4kStarts = new int[18];
+
+        /*
+         * Set the list indexes for binary searches for U+0800, U+1000, U+2000, .., U+F000, U+10000. U+0800 is the
+         * first 3-byte-UTF-8 code point. Lower code points are looked up in the bit tables. The last pair of
+         * indexes is for finding supplementary code points.
+         */
+        list4kStarts[0] = findCodePoint(0x800, 0, listLength - 1);
+        int i;
+        for (i = 1; i <= 0x10; ++i) {
+            list4kStarts[i] = findCodePoint(i << 12, list4kStarts[i - 1], listLength - 1);
+        }
+        list4kStarts[0x11] = listLength - 1;
+
+        initBits();
+    }
+
+    public boolean contains(int c) {
+        if (c <= 0xff) {
+            return (latin1Contains[c]);
+        } else if (c <= 0x7ff) {
+            return ((table7FF[c & 0x3f] & (1 << (c >> 6))) != 0);
+        } else if (c < 0xd800 || (c >= 0xe000 && c <= 0xffff)) {
+            int lead = c >> 12;
+            int twoBits = (bmpBlockBits[(c >> 6) & 0x3f] >> lead) & 0x10001;
+            if (twoBits <= 1) {
+                // All 64 code points with the same bits 15..6
+                // are either in the set or not.
+                return (0 != twoBits);
+            } else {
+                // Look up the code point in its 4k block of code points.
+                return containsSlow(c, list4kStarts[lead], list4kStarts[lead + 1]);
+            }
+        } else if (c <= 0x10ffff) {
+            // surrogate or supplementary code point
+            return containsSlow(c, list4kStarts[0xd], list4kStarts[0x11]);
+        } else {
+            // Out-of-range code points get false, consistent with long-standing
+            // behavior of UnicodeSet.contains(c).
+            return false;
+        }
+    }
+
+    /**
+     * Span the initial substring for which each character c has spanCondition==contains(c). It must be
+     * spanCondition==0 or 1.
+     *
+     * @param start The start index
+     * @param outCount If not null: Receives the number of code points in the span.
+     * @return the limit (exclusive end) of the span
+     *
+     * NOTE: to reduce the overhead of function call to contains(c), it is manually inlined here. Check for
+     * sufficient length for trail unit for each surrogate pair. Handle single surrogates as surrogate code points
+     * as usual in ICU.
+     */
+    public final int span(CharSequence s, int start, SpanCondition spanCondition,
+            OutputInt outCount) {
+        char c, c2;
+        int i = start;
+        int limit = s.length();
+        int numSupplementary = 0;
+        if (SpanCondition.NOT_CONTAINED != spanCondition) {
+            // span
+            while (i < limit) {
+                c = s.charAt(i);
+                if (c <= 0xff) {
+                    if (!latin1Contains[c]) {
+                        break;
+                    }
+                } else if (c <= 0x7ff) {
+                    if ((table7FF[c & 0x3f] & (1 << (c >> 6))) == 0) {
+                        break;
+                    }
+                } else if (c < 0xd800 ||
+                           c >= 0xdc00 || (i + 1) == limit || (c2 = s.charAt(i + 1)) < 0xdc00 || c2 >= 0xe000) {
+                    int lead = c >> 12;
+                    int twoBits = (bmpBlockBits[(c >> 6) & 0x3f] >> lead) & 0x10001;
+                    if (twoBits <= 1) {
+                        // All 64 code points with the same bits 15..6
+                        // are either in the set or not.
+                        if (twoBits == 0) {
+                            break;
+                        }
+                    } else {
+                        // Look up the code point in its 4k block of code points.
+                        if (!containsSlow(c, list4kStarts[lead], list4kStarts[lead + 1])) {
+                            break;
+                        }
+                    }
+                } else {
+                    // surrogate pair
+                    int supplementary = UCharacterProperty.getRawSupplementary(c, c2);
+                    if (!containsSlow(supplementary, list4kStarts[0x10], list4kStarts[0x11])) {
+                        break;
+                    }
+                    ++numSupplementary;
+                    ++i;
+                }
+                ++i;
+            }
+        } else {
+            // span not
+            while (i < limit) {
+                c = s.charAt(i);
+                if (c <= 0xff) {
+                    if (latin1Contains[c]) {
+                        break;
+                    }
+                } else if (c <= 0x7ff) {
+                    if ((table7FF[c & 0x3f] & (1 << (c >> 6))) != 0) {
+                        break;
+                    }
+                } else if (c < 0xd800 ||
+                           c >= 0xdc00 || (i + 1) == limit || (c2 = s.charAt(i + 1)) < 0xdc00 || c2 >= 0xe000) {
+                    int lead = c >> 12;
+                    int twoBits = (bmpBlockBits[(c >> 6) & 0x3f] >> lead) & 0x10001;
+                    if (twoBits <= 1) {
+                        // All 64 code points with the same bits 15..6
+                        // are either in the set or not.
+                        if (twoBits != 0) {
+                            break;
+                        }
+                    } else {
+                        // Look up the code point in its 4k block of code points.
+                        if (containsSlow(c, list4kStarts[lead], list4kStarts[lead + 1])) {
+                            break;
+                        }
+                    }
+                } else {
+                    // surrogate pair
+                    int supplementary = UCharacterProperty.getRawSupplementary(c, c2);
+                    if (containsSlow(supplementary, list4kStarts[0x10], list4kStarts[0x11])) {
+                        break;
+                    }
+                    ++numSupplementary;
+                    ++i;
+                }
+                ++i;
+            }
+        }
+        if (outCount != null) {
+            int spanLength = i - start;
+            outCount.value = spanLength - numSupplementary;  // number of code points
+        }
+        return i;
+    }
+
+    /**
+     * Symmetrical with span().
+     * Span the trailing substring for which each character c has spanCondition==contains(c). It must be s.length >=
+     * limit and spanCondition==0 or 1.
+     *
+     * @return The string index which starts the span (i.e. inclusive).
+     */
+    public final int spanBack(CharSequence s, int limit, SpanCondition spanCondition) {
+        char c, c2;
+
+        if (SpanCondition.NOT_CONTAINED != spanCondition) {
+            // span
+            for (;;) {
+                c = s.charAt(--limit);
+                if (c <= 0xff) {
+                    if (!latin1Contains[c]) {
+                        break;
+                    }
+                } else if (c <= 0x7ff) {
+                    if ((table7FF[c & 0x3f] & (1 << (c >> 6))) == 0) {
+                        break;
+                    }
+                } else if (c < 0xd800 ||
+                           c < 0xdc00 || 0 == limit || (c2 = s.charAt(limit - 1)) < 0xd800 || c2 >= 0xdc00) {
+                    int lead = c >> 12;
+                    int twoBits = (bmpBlockBits[(c >> 6) & 0x3f] >> lead) & 0x10001;
+                    if (twoBits <= 1) {
+                        // All 64 code points with the same bits 15..6
+                        // are either in the set or not.
+                        if (twoBits == 0) {
+                            break;
+                        }
+                    } else {
+                        // Look up the code point in its 4k block of code points.
+                        if (!containsSlow(c, list4kStarts[lead], list4kStarts[lead + 1])) {
+                            break;
+                        }
+                    }
+                } else {
+                    // surrogate pair
+                    int supplementary = UCharacterProperty.getRawSupplementary(c2, c);
+                    if (!containsSlow(supplementary, list4kStarts[0x10], list4kStarts[0x11])) {
+                        break;
+                    }
+                    --limit;
+                }
+                if (0 == limit) {
+                    return 0;
+                }
+            }
+        } else {
+            // span not
+            for (;;) {
+                c = s.charAt(--limit);
+                if (c <= 0xff) {
+                    if (latin1Contains[c]) {
+                        break;
+                    }
+                } else if (c <= 0x7ff) {
+                    if ((table7FF[c & 0x3f] & (1 << (c >> 6))) != 0) {
+                        break;
+                    }
+                } else if (c < 0xd800 ||
+                           c < 0xdc00 || 0 == limit || (c2 = s.charAt(limit - 1)) < 0xd800 || c2 >= 0xdc00) {
+                    int lead = c >> 12;
+                    int twoBits = (bmpBlockBits[(c >> 6) & 0x3f] >> lead) & 0x10001;
+                    if (twoBits <= 1) {
+                        // All 64 code points with the same bits 15..6
+                        // are either in the set or not.
+                        if (twoBits != 0) {
+                            break;
+                        }
+                    } else {
+                        // Look up the code point in its 4k block of code points.
+                        if (containsSlow(c, list4kStarts[lead], list4kStarts[lead + 1])) {
+                            break;
+                        }
+                    }
+                } else {
+                    // surrogate pair
+                    int supplementary = UCharacterProperty.getRawSupplementary(c2, c);
+                    if (containsSlow(supplementary, list4kStarts[0x10], list4kStarts[0x11])) {
+                        break;
+                    }
+                    --limit;
+                }
+                if (0 == limit) {
+                    return 0;
+                }
+            }
+        }
+        return limit + 1;
+    }
+
+    /**
+     * Set bits in a bit rectangle in "vertical" bit organization. start<limit<=0x800
+     */
+    private static void set32x64Bits(int[] table, int start, int limit) {
+        assert (64 == table.length);
+        int lead = start >> 6;  // Named for UTF-8 2-byte lead byte with upper 5 bits.
+        int trail = start & 0x3f;  // Named for UTF-8 2-byte trail byte with lower 6 bits.
+
+        // Set one bit indicating an all-one block.
+        int bits = 1 << lead;
+        if ((start + 1) == limit) { // Single-character shortcut.
+            table[trail] |= bits;
+            return;
+        }
+
+        int limitLead = limit >> 6;
+        int limitTrail = limit & 0x3f;
+
+        if (lead == limitLead) {
+            // Partial vertical bit column.
+            while (trail < limitTrail) {
+                table[trail++] |= bits;
+            }
+        } else {
+            // Partial vertical bit column,
+            // followed by a bit rectangle,
+            // followed by another partial vertical bit column.
+            if (trail > 0) {
+                do {
+                    table[trail++] |= bits;
+                } while (trail < 64);
+                ++lead;
+            }
+            if (lead < limitLead) {
+                bits = ~((1 << lead) - 1);
+                if (limitLead < 0x20) {
+                    bits &= (1 << limitLead) - 1;
+                }
+                for (trail = 0; trail < 64; ++trail) {
+                    table[trail] |= bits;
+                }
+            }
+            // limit<=0x800. If limit==0x800 then limitLead=32 and limitTrail=0.
+            // In that case, bits=1<<limitLead == 1<<0 == 1
+            // (because Java << uses only the lower 5 bits of the shift operand)
+            // but the bits value is not used because trail<limitTrail is already false.
+            bits = 1 << limitLead;
+            for (trail = 0; trail < limitTrail; ++trail) {
+                table[trail] |= bits;
+            }
+        }
+    }
+
+    private void initBits() {
+        int start, limit;
+        int listIndex = 0;
+
+        // Set latin1Contains[].
+        do {
+            start = list[listIndex++];
+            if (listIndex < listLength) {
+                limit = list[listIndex++];
+            } else {
+                limit = 0x110000;
+            }
+            if (start >= 0x100) {
+                break;
+            }
+            do {
+                latin1Contains[start++] = true;
+            } while (start < limit && start < 0x100);
+        } while (limit <= 0x100);
+
+        // Set table7FF[].
+        while (start < 0x800) {
+            set32x64Bits(table7FF, start, limit <= 0x800 ? limit : 0x800);
+            if (limit > 0x800) {
+                start = 0x800;
+                break;
+            }
+
+            start = list[listIndex++];
+            if (listIndex < listLength) {
+                limit = list[listIndex++];
+            } else {
+                limit = 0x110000;
+            }
+        }
+
+        // Set bmpBlockBits[].
+        int minStart = 0x800;
+        while (start < 0x10000) {
+            if (limit > 0x10000) {
+                limit = 0x10000;
+            }
+
+            if (start < minStart) {
+                start = minStart;
+            }
+            if (start < limit) { // Else: Another range entirely in a known mixed-value block.
+                if (0 != (start & 0x3f)) {
+                    // Mixed-value block of 64 code points.
+                    start >>= 6;
+                    bmpBlockBits[start & 0x3f] |= 0x10001 << (start >> 6);
+                    start = (start + 1) << 6; // Round up to the next block boundary.
+                    minStart = start; // Ignore further ranges in this block.
+                }
+                if (start < limit) {
+                    if (start < (limit & ~0x3f)) {
+                        // Multiple all-ones blocks of 64 code points each.
+                        set32x64Bits(bmpBlockBits, start >> 6, limit >> 6);
+                    }
+
+                    if (0 != (limit & 0x3f)) {
+                        // Mixed-value block of 64 code points.
+                        limit >>= 6;
+                        bmpBlockBits[limit & 0x3f] |= 0x10001 << (limit >> 6);
+                      limit = (limit + 1) << 6; // Round up to the next block boundary.
+                        minStart = limit; // Ignore further ranges in this block.
+                    }
+                }
+            }
+
+            if (limit == 0x10000) {
+                break;
+          }
+
+            start = list[listIndex++];
+            if (listIndex < listLength) {
+                limit = list[listIndex++];
+            } else {
+                limit = 0x110000;
+            }
+        }
+    }
+
+    /**
+     * Same as UnicodeSet.findCodePoint(int c) except that the binary search is restricted for finding code
+     * points in a certain range.
+     *
+     * For restricting the search for finding in the range start..end, pass in lo=findCodePoint(start) and
+     * hi=findCodePoint(end) with 0<=lo<=hi<len. findCodePoint(c) defaults to lo=0 and hi=len-1.
+     *
+     * @param c
+     *            a character in a subrange of MIN_VALUE..MAX_VALUE
+     * @param lo
+     *            The lowest index to be returned.
+     * @param hi
+     *            The highest index to be returned.
+     * @return the smallest integer i in the range lo..hi, inclusive, such that c < list[i]
+     */
+    private int findCodePoint(int c, int lo, int hi) {
+        /* Examples:
+                                           findCodePoint(c)
+           set              list[]         c=0 1 3 4 7 8
+           ===              ==============   ===========
+           []               [110000]         0 0 0 0 0 0
+           [\u0000-\u0003]  [0, 4, 110000]   1 1 1 2 2 2
+           [\u0004-\u0007]  [4, 8, 110000]   0 0 0 1 1 2
+           [:Any:]          [0, 110000]      1 1 1 1 1 1
+         */
+
+        // Return the smallest i such that c < list[i]. Assume
+        // list[len - 1] == HIGH and that c is legal (0..HIGH-1).
+        if (c < list[lo])
+            return lo;
+        // High runner test. c is often after the last range, so an
+        // initial check for this condition pays off.
+        if (lo >= hi || c >= list[hi - 1])
+            return hi;
+        // invariant: c >= list[lo]
+        // invariant: c < list[hi]
+        for (;;) {
+            int i = (lo + hi) >>> 1;
+            if (i == lo) {
+                break; // Found!
+            } else if (c < list[i]) {
+                hi = i;
+            } else {
+                lo = i;
+            }
+        }
+        return hi;
+    }
+
+    private final boolean containsSlow(int c, int lo, int hi) {
+        return (0 != (findCodePoint(c, lo, hi) & 1));
+    }
+}
+
diff --git a/tests/test_data/std/jdk/internal/icu/impl/CharTrie.class b/tests/test_data/std/jdk/internal/icu/impl/CharTrie.class
new file mode 100644
index 0000000000000000000000000000000000000000..686df2b376fdd697f74e03f583979a19bf272bbe
GIT binary patch
literal 2255
zcmb7F-*XdH7(F*hyKTCqG^H&x4J_q{O$rUv2-?yj1`4SuAT8AbTDHkHUD)h)k_~ov
z;6cGrADz($nZXgA;e{7xq#ebPM`wKT)jz_&z+u31che;NdT=tkd-vYG-*>)q&Uf?Y
zlV5)akcJaR06_&I6-{Us=)01?nlx?KDA~G|G;@`tSzNJ_vnA6IXg*@vraK{!9?V|R
zujxtCNoMSoiaX<$481s(ef8$u$8}eq)@^g8V(G3i7M}~F1+5CgD%zk5Y=8OQ^s-*^
zlZVZ6{UtaUzo1}~z<`It((OVrV_8N)w~mzxm7-z0CsuRDifcM{3pNWRWPYt+UNdYh
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zvy%r81%bcO$^y5l*oHoVmg0hG=Z)0`fxyMIT<KR4lPgMbAx~%vl8zlJH0%_J6bv`*
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HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/icu/impl/CharTrie.java b/tests/test_data/std/jdk/internal/icu/impl/CharTrie.java
new file mode 100644
index 00000000..e320f670
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/icu/impl/CharTrie.java
@@ -0,0 +1,177 @@
+/*
+ * Copyright (c) 2005, 2020, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/*
+ ******************************************************************************
+ * Copyright (C) 1996-2014, International Business Machines Corporation and
+ * others. All Rights Reserved.
+ ******************************************************************************
+ */
+
+package jdk.internal.icu.impl;
+
+import jdk.internal.icu.text.UTF16;
+
+import java.io.DataInputStream;
+import java.io.InputStream;
+import java.io.IOException;
+
+/**
+ * Trie implementation which stores data in char, 16 bits.
+ * @author synwee
+ * @see com.ibm.icu.impl.Trie
+ * @since release 2.1, Jan 01 2002
+ */
+
+ // note that i need to handle the block calculations later, since chartrie
+ // in icu4c uses the same index array.
+public class CharTrie extends Trie
+{
+    // public constructors ---------------------------------------------
+
+    /**
+     * <p>Creates a new Trie with the settings for the trie data.</p>
+     * <p>Unserialize the 32-bit-aligned input stream and use the data for the
+     * trie.</p>
+     * @param inputStream file input stream to a ICU data file, containing
+     *                    the trie
+     * @param dataManipulate object which provides methods to parse the char
+     *                        data
+     * @throws IOException thrown when data reading fails
+     * @draft 2.1
+     */
+    public CharTrie(InputStream inputStream,
+                    DataManipulate dataManipulate) throws IOException
+    {
+        super(inputStream, dataManipulate);
+
+        if (!isCharTrie()) {
+            throw new IllegalArgumentException(
+                               "Data given does not belong to a char trie.");
+        }
+    }
+
+    // public methods --------------------------------------------------
+
+    /**
+     * Gets the value associated with the codepoint.
+     * If no value is associated with the codepoint, a default value will be
+     * returned.
+     * @param ch codepoint
+     * @return offset to data
+     */
+    public final char getCodePointValue(int ch)
+    {
+        int offset;
+
+        // fastpath for U+0000..U+D7FF
+        if(0 <= ch && ch < UTF16.LEAD_SURROGATE_MIN_VALUE) {
+            // copy of getRawOffset()
+            offset = (m_index_[ch >> INDEX_STAGE_1_SHIFT_] << INDEX_STAGE_2_SHIFT_)
+                    + (ch & INDEX_STAGE_3_MASK_);
+            return m_data_[offset];
+        }
+
+        // handle U+D800..U+10FFFF
+        offset = getCodePointOffset(ch);
+
+        // return -1 if there is an error, in this case we return the default
+        // value: m_initialValue_
+        return (offset >= 0) ? m_data_[offset] : m_initialValue_;
+    }
+
+    /**
+     * Gets the value to the data which this lead surrogate character points
+     * to.
+     * Returned data may contain folding offset information for the next
+     * trailing surrogate character.
+     * This method does not guarantee correct results for trail surrogates.
+     * @param ch lead surrogate character
+     * @return data value
+     */
+    public final char getLeadValue(char ch)
+    {
+       return m_data_[getLeadOffset(ch)];
+    }
+
+    // protected methods -----------------------------------------------
+
+    /**
+     * <p>Parses the input stream and stores its trie content into a index and
+     * data array</p>
+     * @param inputStream data input stream containing trie data
+     * @exception IOException thrown when data reading fails
+     */
+    protected final void unserialize(InputStream inputStream)
+                                                throws IOException
+    {
+        DataInputStream input = new DataInputStream(inputStream);
+        int indexDataLength = m_dataOffset_ + m_dataLength_;
+        m_index_ = new char[indexDataLength];
+        for (int i = 0; i < indexDataLength; i ++) {
+            m_index_[i] = input.readChar();
+        }
+        m_data_           = m_index_;
+        m_initialValue_   = m_data_[m_dataOffset_];
+    }
+
+    /**
+     * Gets the offset to the data which the surrogate pair points to.
+     * @param lead lead surrogate
+     * @param trail trailing surrogate
+     * @return offset to data
+     * @draft 2.1
+     */
+    protected final int getSurrogateOffset(char lead, char trail)
+    {
+        if (m_dataManipulate_ == null) {
+            throw new NullPointerException(
+                             "The field DataManipulate in this Trie is null");
+        }
+
+        // get fold position for the next trail surrogate
+        int offset = m_dataManipulate_.getFoldingOffset(getLeadValue(lead));
+
+        // get the real data from the folded lead/trail units
+        if (offset > 0) {
+            return getRawOffset(offset, (char)(trail & SURROGATE_MASK_));
+        }
+
+        // return -1 if there is an error, in this case we return the default
+        // value: m_initialValue_
+        return -1;
+    }
+
+    // private data members --------------------------------------------
+
+    /**
+     * Default value
+     */
+    private char m_initialValue_;
+    /**
+     * Array of char data
+     */
+    private char m_data_[];
+}
diff --git a/tests/test_data/std/jdk/internal/icu/impl/CharacterIteratorWrapper.class b/tests/test_data/std/jdk/internal/icu/impl/CharacterIteratorWrapper.class
new file mode 100644
index 0000000000000000000000000000000000000000..d9767767f4d0a64d8e9e6832ac9c03c37cd74a00
GIT binary patch
literal 2194
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/icu/impl/CharacterIteratorWrapper.java b/tests/test_data/std/jdk/internal/icu/impl/CharacterIteratorWrapper.java
new file mode 100644
index 00000000..79a6264d
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/icu/impl/CharacterIteratorWrapper.java
@@ -0,0 +1,147 @@
+/*
+ * Copyright (c) 2005, 2020, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/*
+ *******************************************************************************
+ * (C) Copyright IBM Corp. 1996-2005 - All Rights Reserved                     *
+ *                                                                             *
+ * The original version of this source code and documentation is copyrighted   *
+ * and owned by IBM, These materials are provided under terms of a License     *
+ * Agreement between IBM and Sun. This technology is protected by multiple     *
+ * US and International patents. This notice and attribution to IBM may not    *
+ * to removed.                                                                 *
+ *******************************************************************************
+ */
+
+package jdk.internal.icu.impl;
+
+import java.text.CharacterIterator;
+
+import jdk.internal.icu.text.UCharacterIterator;
+
+/**
+ * This class is a wrapper around CharacterIterator and implements the
+ * UCharacterIterator protocol
+ * @author ram
+ */
+
+public class CharacterIteratorWrapper extends UCharacterIterator {
+
+    private CharacterIterator iterator;
+
+    public CharacterIteratorWrapper(CharacterIterator iter){
+        if(iter==null){
+            throw new IllegalArgumentException();
+        }
+        iterator     = iter;
+    }
+
+    /**
+     * @see UCharacterIterator#current()
+     */
+    public int current() {
+        int c = iterator.current();
+        if(c==CharacterIterator.DONE){
+          return DONE;
+        }
+        return c;
+    }
+
+    /**
+     * @see UCharacterIterator#getLength()
+     */
+    public int getLength() {
+        return (iterator.getEndIndex() - iterator.getBeginIndex());
+    }
+
+    /**
+     * @see UCharacterIterator#getIndex()
+     */
+    public int getIndex() {
+        return iterator.getIndex();
+    }
+
+    /**
+     * @see UCharacterIterator#next()
+     */
+    public int next() {
+        int i = iterator.current();
+        iterator.next();
+        if(i==CharacterIterator.DONE){
+          return DONE;
+        }
+        return i;
+    }
+
+    /**
+     * @see UCharacterIterator#previous()
+     */
+    public int previous() {
+        int i = iterator.previous();
+        if(i==CharacterIterator.DONE){
+            return DONE;
+        }
+        return i;
+    }
+
+    /**
+     * @see UCharacterIterator#setIndex(int)
+     */
+    public void setIndex(int index) {
+        iterator.setIndex(index);
+    }
+
+    /**
+     * @see UCharacterIterator#getText(char[])
+     */
+    public int getText(char[] fillIn, int offset){
+        int length =iterator.getEndIndex() - iterator.getBeginIndex();
+        int currentIndex = iterator.getIndex();
+        if(offset < 0 || offset + length > fillIn.length){
+            throw new IndexOutOfBoundsException(Integer.toString(length));
+        }
+
+        for (char ch = iterator.first(); ch != CharacterIterator.DONE; ch = iterator.next()) {
+            fillIn[offset++] = ch;
+        }
+        iterator.setIndex(currentIndex);
+
+        return length;
+    }
+
+    /**
+     * Creates a clone of this iterator.  Clones the underlying character iterator.
+     * @see UCharacterIterator#clone()
+     */
+    public Object clone(){
+        try {
+            CharacterIteratorWrapper result = (CharacterIteratorWrapper) super.clone();
+            result.iterator = (CharacterIterator)this.iterator.clone();
+            return result;
+        } catch (CloneNotSupportedException e) {
+            return null; // only invoked if bad underlying character iterator
+        }
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/icu/impl/ICUBinary$1.class b/tests/test_data/std/jdk/internal/icu/impl/ICUBinary$1.class
new file mode 100644
index 0000000000000000000000000000000000000000..bb320a1c3d68c9d1df4a6aa3649e4f3e763c71f4
GIT binary patch
literal 1069
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literal 0
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diff --git a/tests/test_data/std/jdk/internal/icu/impl/ICUBinary$Authenticate.class b/tests/test_data/std/jdk/internal/icu/impl/ICUBinary$Authenticate.class
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index 0000000000000000000000000000000000000000..ecf1fa119e71568d219515e1ee6bc2ec2b54d672
GIT binary patch
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literal 0
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diff --git a/tests/test_data/std/jdk/internal/icu/impl/ICUBinary$IsAcceptable.class b/tests/test_data/std/jdk/internal/icu/impl/ICUBinary$IsAcceptable.class
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literal 0
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diff --git a/tests/test_data/std/jdk/internal/icu/impl/ICUBinary.class b/tests/test_data/std/jdk/internal/icu/impl/ICUBinary.class
new file mode 100644
index 0000000000000000000000000000000000000000..8de7540d52cc8c4063df2d84247b048298b9f6fb
GIT binary patch
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HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/icu/impl/ICUBinary.java b/tests/test_data/std/jdk/internal/icu/impl/ICUBinary.java
new file mode 100644
index 00000000..d8b48e7f
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/icu/impl/ICUBinary.java
@@ -0,0 +1,324 @@
+/*
+ * Copyright (c) 2003, 2021, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/*
+ *******************************************************************************
+ * Copyright (C) 1996-2014, International Business Machines Corporation and
+ * others. All Rights Reserved.
+ *******************************************************************************
+ */
+
+package jdk.internal.icu.impl;
+
+import java.io.DataInputStream;
+import java.io.InputStream;
+import java.io.IOException;
+import java.io.UncheckedIOException;
+import java.nio.ByteBuffer;
+import java.nio.ByteOrder;
+import java.util.Arrays;
+import java.security.AccessController;
+import java.security.PrivilegedAction;
+
+import jdk.internal.icu.util.VersionInfo;
+
+public final class ICUBinary {
+
+    private static final class IsAcceptable implements Authenticate {
+        @Override
+        public boolean isDataVersionAcceptable(byte version[]) {
+            return version[0] == 1;
+        }
+    }
+
+    // public inner interface ------------------------------------------------
+
+    /**
+     * Special interface for data authentication
+     */
+    public static interface Authenticate
+    {
+        /**
+         * Method used in ICUBinary.readHeader() to provide data format
+         * authentication.
+         * @param version version of the current data
+         * @return true if dataformat is an acceptable version, false otherwise
+         */
+        public boolean isDataVersionAcceptable(byte version[]);
+    }
+
+    // public methods --------------------------------------------------------
+
+    /**
+     * Loads an ICU binary data file and returns it as a ByteBuffer.
+     * The buffer contents is normally read-only, but its position etc. can be modified.
+     *
+     * @param itemPath Relative ICU data item path, for example "root.res" or "coll/ucadata.icu".
+     * @return The data as a read-only ByteBuffer.
+     */
+    public static ByteBuffer getRequiredData(String itemPath) {
+        final Class<ICUBinary> root = ICUBinary.class;
+
+        try (@SuppressWarnings("removal") InputStream is = AccessController.doPrivileged(new PrivilegedAction<InputStream>() {
+                public InputStream run() {
+                    return root.getResourceAsStream(itemPath);
+                }
+            })) {
+
+            // is.available() may return 0, or 1, or the total number of bytes in the stream,
+            // or some other number.
+            // Do not try to use is.available() == 0 to find the end of the stream!
+            byte[] bytes;
+            int avail = is.available();
+            if (avail > 32) {
+                // There are more bytes available than just the ICU data header length.
+                // With luck, it is the total number of bytes.
+                bytes = new byte[avail];
+            } else {
+                bytes = new byte[128];  // empty .res files are even smaller
+            }
+            // Call is.read(...) until one returns a negative value.
+            int length = 0;
+            for(;;) {
+                if (length < bytes.length) {
+                    int numRead = is.read(bytes, length, bytes.length - length);
+                    if (numRead < 0) {
+                        break;  // end of stream
+                    }
+                    length += numRead;
+                } else {
+                    // See if we are at the end of the stream before we grow the array.
+                    int nextByte = is.read();
+                    if (nextByte < 0) {
+                        break;
+                    }
+                    int capacity = 2 * bytes.length;
+                    if (capacity < 128) {
+                        capacity = 128;
+                    } else if (capacity < 0x4000) {
+                        capacity *= 2;  // Grow faster until we reach 16kB.
+                    }
+                    bytes = Arrays.copyOf(bytes, capacity);
+                    bytes[length++] = (byte) nextByte;
+                }
+           }
+            return ByteBuffer.wrap(bytes, 0, length);
+        }
+        catch (IOException e) {
+            throw new UncheckedIOException(e);
+        }
+    }
+
+    /**
+     * Same as readHeader(), but returns a VersionInfo rather than a compact int.
+     */
+    public static VersionInfo readHeaderAndDataVersion(ByteBuffer bytes,
+                                                             int dataFormat,
+                                                             Authenticate authenticate)
+                                                                throws IOException {
+        return getVersionInfoFromCompactInt(readHeader(bytes, dataFormat, authenticate));
+    }
+
+    private static final byte BIG_ENDIAN_ = 1;
+    public static final byte[] readHeader(InputStream inputStream,
+                                        byte dataFormatIDExpected[],
+                                        Authenticate authenticate)
+                                                          throws IOException
+    {
+        DataInputStream input = new DataInputStream(inputStream);
+        char headersize = input.readChar();
+        int readcount = 2;
+        //reading the header format
+        byte magic1 = input.readByte();
+        readcount ++;
+        byte magic2 = input.readByte();
+        readcount ++;
+        if (magic1 != MAGIC1 || magic2 != MAGIC2) {
+            throw new IOException(MAGIC_NUMBER_AUTHENTICATION_FAILED_);
+        }
+
+        input.readChar(); // reading size
+        readcount += 2;
+        input.readChar(); // reading reserved word
+        readcount += 2;
+        byte bigendian    = input.readByte();
+        readcount ++;
+        byte charset      = input.readByte();
+        readcount ++;
+        byte charsize     = input.readByte();
+        readcount ++;
+        input.readByte(); // reading reserved byte
+        readcount ++;
+
+        byte dataFormatID[] = new byte[4];
+        input.readFully(dataFormatID);
+        readcount += 4;
+        byte dataVersion[] = new byte[4];
+        input.readFully(dataVersion);
+        readcount += 4;
+        byte unicodeVersion[] = new byte[4];
+        input.readFully(unicodeVersion);
+        readcount += 4;
+        if (headersize < readcount) {
+            throw new IOException("Internal Error: Header size error");
+        }
+        input.skipBytes(headersize - readcount);
+
+        if (bigendian != BIG_ENDIAN_ || charset != CHAR_SET_
+            || charsize != CHAR_SIZE_
+            || !Arrays.equals(dataFormatIDExpected, dataFormatID)
+            || (authenticate != null
+                && !authenticate.isDataVersionAcceptable(dataVersion))) {
+            throw new IOException(HEADER_AUTHENTICATION_FAILED_);
+        }
+        return unicodeVersion;
+    }
+
+    /**
+     * Reads an ICU data header, checks the data format, and returns the data version.
+     *
+     * <p>Assumes that the ByteBuffer position is 0 on input.
+     * The buffer byte order is set according to the data.
+     * The buffer position is advanced past the header (including UDataInfo and comment).
+     *
+     * <p>See C++ ucmndata.h and unicode/udata.h.
+     *
+     * @return dataVersion
+     * @throws IOException if this is not a valid ICU data item of the expected dataFormat
+     */
+    public static int readHeader(ByteBuffer bytes, int dataFormat, Authenticate authenticate)
+            throws IOException {
+        assert bytes.position() == 0;
+        byte magic1 = bytes.get(2);
+        byte magic2 = bytes.get(3);
+        if (magic1 != MAGIC1 || magic2 != MAGIC2) {
+            throw new IOException(MAGIC_NUMBER_AUTHENTICATION_FAILED_);
+        }
+
+        byte isBigEndian = bytes.get(8);
+        byte charsetFamily = bytes.get(9);
+        byte sizeofUChar = bytes.get(10);
+        if (isBigEndian < 0 || 1 < isBigEndian ||
+                charsetFamily != CHAR_SET_ || sizeofUChar != CHAR_SIZE_) {
+            throw new IOException(HEADER_AUTHENTICATION_FAILED_);
+        }
+        bytes.order(isBigEndian != 0 ? ByteOrder.BIG_ENDIAN : ByteOrder.LITTLE_ENDIAN);
+
+        int headerSize = bytes.getChar(0);
+        int sizeofUDataInfo = bytes.getChar(4);
+        if (sizeofUDataInfo < 20 || headerSize < (sizeofUDataInfo + 4)) {
+            throw new IOException("Internal Error: Header size error");
+        }
+        // TODO: Change Authenticate to take int major, int minor, int milli, int micro
+        // to avoid array allocation.
+        byte[] formatVersion = new byte[] {
+            bytes.get(16), bytes.get(17), bytes.get(18), bytes.get(19)
+        };
+        if (bytes.get(12) != (byte)(dataFormat >> 24) ||
+                bytes.get(13) != (byte)(dataFormat >> 16) ||
+                bytes.get(14) != (byte)(dataFormat >> 8) ||
+                bytes.get(15) != (byte)dataFormat ||
+                (authenticate != null && !authenticate.isDataVersionAcceptable(formatVersion))) {
+            throw new IOException(HEADER_AUTHENTICATION_FAILED_ +
+                    String.format("; data format %02x%02x%02x%02x, format version %d.%d.%d.%d",
+                            bytes.get(12), bytes.get(13), bytes.get(14), bytes.get(15),
+                            formatVersion[0] & 0xff, formatVersion[1] & 0xff,
+                            formatVersion[2] & 0xff, formatVersion[3] & 0xff));
+        }
+
+        bytes.position(headerSize);
+        return  // dataVersion
+                ((int)bytes.get(20) << 24) |
+                ((bytes.get(21) & 0xff) << 16) |
+                ((bytes.get(22) & 0xff) << 8) |
+                (bytes.get(23) & 0xff);
+    }
+
+    public static void skipBytes(ByteBuffer bytes, int skipLength) {
+        if (skipLength > 0) {
+            bytes.position(bytes.position() + skipLength);
+        }
+    }
+
+    public static byte[] getBytes(ByteBuffer bytes, int length, int additionalSkipLength) {
+        byte[] dest = new byte[length];
+        bytes.get(dest);
+        if (additionalSkipLength > 0) {
+            skipBytes(bytes, additionalSkipLength);
+        }
+        return dest;
+    }
+
+    public static String getString(ByteBuffer bytes, int length, int additionalSkipLength) {
+        CharSequence cs = bytes.asCharBuffer();
+        String s = cs.subSequence(0, length).toString();
+        skipBytes(bytes, length * 2 + additionalSkipLength);
+        return s;
+    }
+
+    public static char[] getChars(ByteBuffer bytes, int length, int additionalSkipLength) {
+        char[] dest = new char[length];
+        bytes.asCharBuffer().get(dest);
+        skipBytes(bytes, length * 2 + additionalSkipLength);
+        return dest;
+    }
+
+    public static int[] getInts(ByteBuffer bytes, int length, int additionalSkipLength) {
+        int[] dest = new int[length];
+        bytes.asIntBuffer().get(dest);
+        skipBytes(bytes, length * 4 + additionalSkipLength);
+        return dest;
+    }
+
+    /**
+     * Returns a VersionInfo for the bytes in the compact version integer.
+     */
+    public static VersionInfo getVersionInfoFromCompactInt(int version) {
+        return VersionInfo.getInstance(
+                version >>> 24, (version >> 16) & 0xff, (version >> 8) & 0xff, version & 0xff);
+    }
+
+    // private variables -------------------------------------------------
+
+    /**
+     * Magic numbers to authenticate the data file
+     */
+    private static final byte MAGIC1 = (byte)0xda;
+    private static final byte MAGIC2 = (byte)0x27;
+
+    /**
+     * File format authentication values
+     */
+    private static final byte CHAR_SET_ = 0;
+    private static final byte CHAR_SIZE_ = 2;
+
+    /**
+     * Error messages
+     */
+    private static final String MAGIC_NUMBER_AUTHENTICATION_FAILED_ =
+                       "ICUBinary data file error: Magic number authentication failed";
+    private static final String HEADER_AUTHENTICATION_FAILED_ =
+        "ICUBinary data file error: Header authentication failed";
+}
diff --git a/tests/test_data/std/jdk/internal/icu/impl/Norm2AllModes$ComposeNormalizer2.class b/tests/test_data/std/jdk/internal/icu/impl/Norm2AllModes$ComposeNormalizer2.class
new file mode 100644
index 0000000000000000000000000000000000000000..4b0b575ad252af110647dcf7e923ec41a0e7e519
GIT binary patch
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literal 0
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diff --git a/tests/test_data/std/jdk/internal/icu/impl/Norm2AllModes$DecomposeNormalizer2.class b/tests/test_data/std/jdk/internal/icu/impl/Norm2AllModes$DecomposeNormalizer2.class
new file mode 100644
index 0000000000000000000000000000000000000000..6ebad8b62093ac513342102461a9fca128833a9e
GIT binary patch
literal 1774
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literal 0
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diff --git a/tests/test_data/std/jdk/internal/icu/impl/Norm2AllModes$NFCSingleton.class b/tests/test_data/std/jdk/internal/icu/impl/Norm2AllModes$NFCSingleton.class
new file mode 100644
index 0000000000000000000000000000000000000000..809ab7c8e332ae6a9b5614bdca1e96aee6a6b26e
GIT binary patch
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/icu/impl/Norm2AllModes$NFKCSingleton.class b/tests/test_data/std/jdk/internal/icu/impl/Norm2AllModes$NFKCSingleton.class
new file mode 100644
index 0000000000000000000000000000000000000000..b9d4b920fdf071fc494baa5c3a6d619380343b30
GIT binary patch
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literal 0
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diff --git a/tests/test_data/std/jdk/internal/icu/impl/Norm2AllModes$NoopNormalizer2.class b/tests/test_data/std/jdk/internal/icu/impl/Norm2AllModes$NoopNormalizer2.class
new file mode 100644
index 0000000000000000000000000000000000000000..7ada34714a59fafed1b0ec6ea25a89d8ba7d1186
GIT binary patch
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diff --git a/tests/test_data/std/jdk/internal/icu/impl/Norm2AllModes$Norm2AllModesSingleton.class b/tests/test_data/std/jdk/internal/icu/impl/Norm2AllModes$Norm2AllModesSingleton.class
new file mode 100644
index 0000000000000000000000000000000000000000..623afa8a7632b3d428545e718a105e5bf20a4bac
GIT binary patch
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diff --git a/tests/test_data/std/jdk/internal/icu/impl/Norm2AllModes$Normalizer2WithImpl.class b/tests/test_data/std/jdk/internal/icu/impl/Norm2AllModes$Normalizer2WithImpl.class
new file mode 100644
index 0000000000000000000000000000000000000000..a736a551bb114e6cbc98a7961102a5b19dc63f83
GIT binary patch
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diff --git a/tests/test_data/std/jdk/internal/icu/impl/Norm2AllModes.class b/tests/test_data/std/jdk/internal/icu/impl/Norm2AllModes.class
new file mode 100644
index 0000000000000000000000000000000000000000..42ddb2d320bf622c248afaf360d0a4a6bbeac430
GIT binary patch
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HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/icu/impl/Norm2AllModes.java b/tests/test_data/std/jdk/internal/icu/impl/Norm2AllModes.java
new file mode 100644
index 00000000..7922bb46
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/icu/impl/Norm2AllModes.java
@@ -0,0 +1,292 @@
+/*
+ * Copyright (c) 2015, 2020, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/*
+ *******************************************************************************
+ *   Copyright (C) 2009-2014, International Business Machines
+ *   Corporation and others.  All Rights Reserved.
+ *******************************************************************************
+ */
+
+package jdk.internal.icu.impl;
+
+import java.io.IOException;
+
+import jdk.internal.icu.text.Normalizer2;
+import jdk.internal.icu.util.VersionInfo;
+
+public final class Norm2AllModes {
+    // Public API dispatch via Normalizer2 subclasses -------------------------- ***
+
+    // Normalizer2 implementation for the old UNORM_NONE.
+    public static final class NoopNormalizer2 extends Normalizer2 {
+        @Override
+        public StringBuilder normalize(CharSequence src, StringBuilder dest) {
+            if(dest!=src) {
+                dest.setLength(0);
+                return dest.append(src);
+            } else {
+                throw new IllegalArgumentException();
+            }
+        }
+
+        @Override
+        public Appendable normalize(CharSequence src, Appendable dest) {
+            if(dest!=src) {
+                try {
+                    return dest.append(src);
+                } catch(IOException e) {
+                    throw new InternalError(e.toString(), e);
+                }
+            } else {
+                throw new IllegalArgumentException();
+            }
+        }
+
+        @Override
+        public StringBuilder normalizeSecondAndAppend(StringBuilder first, CharSequence second) {
+            if(first!=second) {
+                return first.append(second);
+            } else {
+                throw new IllegalArgumentException();
+            }
+        }
+
+        @Override
+        public StringBuilder append(StringBuilder first, CharSequence second) {
+            if(first!=second) {
+                return first.append(second);
+            } else {
+                throw new IllegalArgumentException();
+            }
+        }
+
+        @Override
+        public String getDecomposition(int c) {
+            return null;
+        }
+
+        // No need to override the default getRawDecomposition().
+        @Override
+        public boolean isNormalized(CharSequence s) { return true; }
+
+        @Override
+        public int spanQuickCheckYes(CharSequence s) { return s.length(); }
+
+        @Override
+        public boolean hasBoundaryBefore(int c) { return true; }
+    }
+
+    // Intermediate class:
+    // Has NormalizerImpl and does boilerplate argument checking and setup.
+    public abstract static class Normalizer2WithImpl extends Normalizer2 {
+        public Normalizer2WithImpl(NormalizerImpl ni) {
+            impl=ni;
+        }
+
+        // normalize
+        @Override
+        public StringBuilder normalize(CharSequence src, StringBuilder dest) {
+            if(dest==src) {
+                throw new IllegalArgumentException();
+            }
+            dest.setLength(0);
+            normalize(src, new NormalizerImpl.ReorderingBuffer(impl, dest, src.length()));
+            return dest;
+        }
+
+        @Override
+        public Appendable normalize(CharSequence src, Appendable dest) {
+            if(dest==src) {
+                throw new IllegalArgumentException();
+            }
+            NormalizerImpl.ReorderingBuffer buffer=
+                new NormalizerImpl.ReorderingBuffer(impl, dest, src.length());
+            normalize(src, buffer);
+            buffer.flush();
+            return dest;
+        }
+
+        protected abstract void normalize(CharSequence src, NormalizerImpl.ReorderingBuffer buffer);
+
+        // normalize and append
+        @Override
+        public StringBuilder normalizeSecondAndAppend(StringBuilder first, CharSequence second) {
+            return normalizeSecondAndAppend(first, second, true);
+        }
+
+        @Override
+        public StringBuilder append(StringBuilder first, CharSequence second) {
+            return normalizeSecondAndAppend(first, second, false);
+        }
+
+        public StringBuilder normalizeSecondAndAppend(
+                StringBuilder first, CharSequence second, boolean doNormalize) {
+            if(first==second) {
+                throw new IllegalArgumentException();
+            }
+            normalizeAndAppend(
+                second, doNormalize,
+                new NormalizerImpl.ReorderingBuffer(impl, first, first.length()+second.length()));
+            return first;
+        }
+
+        protected abstract void normalizeAndAppend(
+                CharSequence src, boolean doNormalize, NormalizerImpl.ReorderingBuffer buffer);
+
+        @Override
+        public String getDecomposition(int c) {
+            return impl.getDecomposition(c);
+        }
+
+        @Override
+        public int getCombiningClass(int c) {
+            return impl.getCC(impl.getNorm16(c));
+        }
+
+        // quick checks
+        @Override
+        public boolean isNormalized(CharSequence s) {
+            return s.length()==spanQuickCheckYes(s);
+        }
+
+        public final NormalizerImpl impl;
+    }
+
+    public static final class DecomposeNormalizer2 extends Normalizer2WithImpl {
+        public DecomposeNormalizer2(NormalizerImpl ni) {
+            super(ni);
+        }
+
+        @Override
+        protected void normalize(CharSequence src, NormalizerImpl.ReorderingBuffer buffer) {
+            impl.decompose(src, 0, src.length(), buffer);
+        }
+
+        @Override
+        protected void normalizeAndAppend(
+                CharSequence src, boolean doNormalize, NormalizerImpl.ReorderingBuffer buffer) {
+            impl.decomposeAndAppend(src, doNormalize, buffer);
+        }
+
+        @Override
+        public int spanQuickCheckYes(CharSequence s) {
+            return impl.decompose(s, 0, s.length(), null);
+        }
+
+        @Override
+        public boolean hasBoundaryBefore(int c) { return impl.hasDecompBoundaryBefore(c); }
+    }
+
+    public static final class ComposeNormalizer2 extends Normalizer2WithImpl {
+        public ComposeNormalizer2(NormalizerImpl ni, boolean fcc) {
+            super(ni);
+            onlyContiguous=fcc;
+        }
+
+        @Override
+        protected void normalize(CharSequence src, NormalizerImpl.ReorderingBuffer buffer) {
+            impl.compose(src, 0, src.length(), onlyContiguous, true, buffer);
+        }
+
+        @Override
+        protected void normalizeAndAppend(
+                CharSequence src, boolean doNormalize, NormalizerImpl.ReorderingBuffer buffer) {
+            impl.composeAndAppend(src, doNormalize, onlyContiguous, buffer);
+        }
+
+        @Override
+        public boolean isNormalized(CharSequence s) {
+            // 5: small destCapacity for substring normalization
+            return impl.compose(s, 0, s.length(),
+                                onlyContiguous, false,
+                                new NormalizerImpl.ReorderingBuffer(impl, new StringBuilder(), 5));
+        }
+
+        @Override
+        public int spanQuickCheckYes(CharSequence s) {
+            return impl.composeQuickCheck(s, 0, s.length(), onlyContiguous, true)>>>1;
+        }
+
+        @Override
+        public boolean hasBoundaryBefore(int c) { return impl.hasCompBoundaryBefore(c); }
+
+        private final boolean onlyContiguous;
+    }
+
+    // instance cache ---------------------------------------------------------- ***
+
+    private Norm2AllModes(NormalizerImpl ni) {
+        impl=ni;
+        comp=new ComposeNormalizer2(ni, false);
+        decomp=new DecomposeNormalizer2(ni);
+    }
+
+    public final NormalizerImpl impl;
+    public final ComposeNormalizer2 comp;
+    public final DecomposeNormalizer2 decomp;
+
+    private static Norm2AllModes getInstanceFromSingleton(Norm2AllModesSingleton singleton) {
+        if(singleton.exception!=null) {
+            throw singleton.exception;
+        }
+        return singleton.allModes;
+    }
+
+    public static Norm2AllModes getNFCInstance() {
+        return getInstanceFromSingleton(NFCSingleton.INSTANCE);
+    }
+
+    public static Norm2AllModes getNFKCInstance() {
+        return getInstanceFromSingleton(NFKCSingleton.INSTANCE);
+    }
+
+    public static final NoopNormalizer2 NOOP_NORMALIZER2=new NoopNormalizer2();
+
+    private static final class Norm2AllModesSingleton {
+        private Norm2AllModesSingleton(String name) {
+            try {
+                @SuppressWarnings("deprecation")
+                String DATA_FILE_NAME = "/jdk/internal/icu/impl/data/icudt" +
+                    VersionInfo.ICU_DATA_VERSION_PATH + "/" + name + ".nrm";
+                NormalizerImpl impl=new NormalizerImpl().load(DATA_FILE_NAME);
+                allModes=new Norm2AllModes(impl);
+            } catch (RuntimeException e) {
+                exception=e;
+            }
+        }
+
+        private Norm2AllModes allModes;
+        private RuntimeException exception;
+    }
+
+    private static final class NFCSingleton {
+        private static final Norm2AllModesSingleton INSTANCE=new Norm2AllModesSingleton("nfc");
+    }
+
+    private static final class NFKCSingleton {
+        private static final Norm2AllModesSingleton INSTANCE=new Norm2AllModesSingleton("nfkc");
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/icu/impl/NormalizerImpl$Hangul.class b/tests/test_data/std/jdk/internal/icu/impl/NormalizerImpl$Hangul.class
new file mode 100644
index 0000000000000000000000000000000000000000..aa47418a2a0b09a47cae01383432b8b6b4d2d175
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diff --git a/tests/test_data/std/jdk/internal/icu/impl/NormalizerImpl$IsAcceptable.class b/tests/test_data/std/jdk/internal/icu/impl/NormalizerImpl$IsAcceptable.class
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diff --git a/tests/test_data/std/jdk/internal/icu/impl/NormalizerImpl$NextCCArgs.class b/tests/test_data/std/jdk/internal/icu/impl/NormalizerImpl$NextCCArgs.class
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HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/icu/impl/NormalizerImpl.java b/tests/test_data/std/jdk/internal/icu/impl/NormalizerImpl.java
new file mode 100644
index 00000000..291653f9
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/icu/impl/NormalizerImpl.java
@@ -0,0 +1,2193 @@
+/*
+ * Copyright (c) 2009, 2022, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/*
+ *******************************************************************************
+ *   Copyright (C) 2009-2015, International Business Machines
+ *   Corporation and others.  All Rights Reserved.
+ *******************************************************************************
+ */
+package jdk.internal.icu.impl;
+
+import java.io.IOException;
+import java.nio.ByteBuffer;
+
+import jdk.internal.icu.lang.UCharacter;
+import jdk.internal.icu.text.Normalizer2;
+import jdk.internal.icu.text.UTF16;
+import jdk.internal.icu.util.CodePointTrie;
+import jdk.internal.icu.util.VersionInfo;
+
+// Original filename in ICU4J: Normalizer2Impl.java
+public final class NormalizerImpl {
+    public static final class Hangul {
+        /* Korean Hangul and Jamo constants */
+        public static final int JAMO_L_BASE=0x1100;     /* "lead" jamo */
+        public static final int JAMO_V_BASE=0x1161;     /* "vowel" jamo */
+        public static final int JAMO_T_BASE=0x11a7;     /* "trail" jamo */
+
+        public static final int HANGUL_BASE=0xac00;
+        public static final int HANGUL_END=0xd7a3;
+
+        public static final int JAMO_L_COUNT=19;
+        public static final int JAMO_V_COUNT=21;
+        public static final int JAMO_T_COUNT=28;
+
+        public static final int HANGUL_COUNT=JAMO_L_COUNT*JAMO_V_COUNT*JAMO_T_COUNT;
+        public static final int HANGUL_LIMIT=HANGUL_BASE+HANGUL_COUNT;
+
+        public static boolean isHangul(int c) {
+            return HANGUL_BASE<=c && c<HANGUL_LIMIT;
+        }
+        public static boolean isHangulLV(int c) {
+            c-=HANGUL_BASE;
+            return 0<=c && c<HANGUL_COUNT && c%JAMO_T_COUNT==0;
+        }
+
+        /**
+         * Decomposes c, which must be a Hangul syllable, into buffer
+         * and returns the length of the decomposition (2 or 3).
+         */
+        public static int decompose(int c, Appendable buffer) {
+            try {
+                c-=HANGUL_BASE;
+                int c2=c%JAMO_T_COUNT;
+                c/=JAMO_T_COUNT;
+                buffer.append((char)(JAMO_L_BASE+c/JAMO_V_COUNT));
+                buffer.append((char)(JAMO_V_BASE+c%JAMO_V_COUNT));
+                if(c2==0) {
+                    return 2;
+                } else {
+                    buffer.append((char)(JAMO_T_BASE+c2));
+                    return 3;
+                }
+            } catch(IOException e) {
+                throw new InternalError(e);
+            }
+        }
+    }
+
+    /**
+     * Writable buffer that takes care of canonical ordering.
+     * Its Appendable methods behave like the C++ implementation's
+     * appendZeroCC() methods.
+     * <p>
+     * If dest is a StringBuilder, then the buffer writes directly to it.
+     * Otherwise, the buffer maintains a StringBuilder for intermediate text segments
+     * until no further changes are necessary and whole segments are appended.
+     * append() methods that take combining-class values always write to the StringBuilder.
+     * Other append() methods flush and append to the Appendable.
+     */
+    public static final class ReorderingBuffer implements Appendable {
+        public ReorderingBuffer(NormalizerImpl ni, Appendable dest, int destCapacity) {
+            impl=ni;
+            app=dest;
+            if (app instanceof StringBuilder) {
+                appIsStringBuilder=true;
+                str=(StringBuilder)dest;
+                // In Java, the constructor subsumes public void init(int destCapacity)
+                str.ensureCapacity(destCapacity);
+                reorderStart=0;
+                if(str.length()==0) {
+                    lastCC=0;
+                } else {
+                    setIterator();
+                    lastCC=previousCC();
+                    // Set reorderStart after the last code point with cc<=1 if there is one.
+                    if(lastCC>1) {
+                        while(previousCC()>1) {}
+                    }
+                    reorderStart=codePointLimit;
+                }
+            } else {
+                appIsStringBuilder=false;
+                str=new StringBuilder();
+                reorderStart=0;
+                lastCC=0;
+            }
+        }
+
+        public boolean isEmpty() { return str.length()==0; }
+        public int length() { return str.length(); }
+        public int getLastCC() { return lastCC; }
+
+        public StringBuilder getStringBuilder() { return str; }
+
+        public boolean equals(CharSequence s, int start, int limit) {
+            return UTF16Plus.equal(str, 0, str.length(), s, start, limit);
+        }
+
+        public void append(int c, int cc) {
+            if(lastCC<=cc || cc==0) {
+                str.appendCodePoint(c);
+                lastCC=cc;
+                if(cc<=1) {
+                    reorderStart=str.length();
+                }
+            } else {
+                insert(c, cc);
+            }
+        }
+        public void append(CharSequence s, int start, int limit, boolean isNFD,
+                           int leadCC, int trailCC) {
+            if(start==limit) {
+                return;
+            }
+            if(lastCC<=leadCC || leadCC==0) {
+                if(trailCC<=1) {
+                    reorderStart=str.length()+(limit-start);
+                } else if(leadCC<=1) {
+                    reorderStart=str.length()+1;  // Ok if not a code point boundary.
+                }
+                str.append(s, start, limit);
+                lastCC=trailCC;
+            } else {
+                int c=Character.codePointAt(s, start);
+                start+=Character.charCount(c);
+                insert(c, leadCC);  // insert first code point
+                while(start<limit) {
+                    c=Character.codePointAt(s, start);
+                    start+=Character.charCount(c);
+                    if(start<limit) {
+                        if (isNFD) {
+                            leadCC = getCCFromYesOrMaybe(impl.getNorm16(c));
+                        } else {
+                            leadCC = impl.getCC(impl.getNorm16(c));
+                        }
+                    } else {
+                        leadCC=trailCC;
+                    }
+                    append(c, leadCC);
+                }
+            }
+        }
+        // The following append() methods work like C++ appendZeroCC().
+        // They assume that the cc or trailCC of their input is 0.
+        // Most of them implement Appendable interface methods.
+        @Override
+        public ReorderingBuffer append(char c) {
+            str.append(c);
+            lastCC=0;
+            reorderStart=str.length();
+            return this;
+        }
+        public void appendZeroCC(int c) {
+            str.appendCodePoint(c);
+            lastCC=0;
+            reorderStart=str.length();
+        }
+        @Override
+        public ReorderingBuffer append(CharSequence s) {
+            if(s.length()!=0) {
+                str.append(s);
+                lastCC=0;
+                reorderStart=str.length();
+            }
+            return this;
+        }
+        @Override
+        public ReorderingBuffer append(CharSequence s, int start, int limit) {
+            if(start!=limit) {
+                str.append(s, start, limit);
+                lastCC=0;
+                reorderStart=str.length();
+            }
+            return this;
+        }
+        /**
+         * Flushes from the intermediate StringBuilder to the Appendable,
+         * if they are different objects.
+         * Used after recomposition.
+         * Must be called at the end when writing to a non-StringBuilder Appendable.
+         */
+        public void flush() {
+            if(appIsStringBuilder) {
+                reorderStart=str.length();
+            } else {
+                try {
+                    app.append(str);
+                    str.setLength(0);
+                    reorderStart=0;
+                } catch(IOException e) {
+                    throw new InternalError(e);  // Avoid declaring "throws IOException".
+                }
+            }
+            lastCC=0;
+        }
+        /**
+         * Flushes from the intermediate StringBuilder to the Appendable,
+         * if they are different objects.
+         * Then appends the new text to the Appendable or StringBuilder.
+         * Normally used after quick check loops find a non-empty sequence.
+         */
+        public ReorderingBuffer flushAndAppendZeroCC(CharSequence s, int start, int limit) {
+            if(appIsStringBuilder) {
+                str.append(s, start, limit);
+                reorderStart=str.length();
+            } else {
+                try {
+                    app.append(str).append(s, start, limit);
+                    str.setLength(0);
+                    reorderStart=0;
+                } catch(IOException e) {
+                    throw new InternalError(e);  // Avoid declaring "throws IOException".
+                }
+            }
+            lastCC=0;
+            return this;
+        }
+        public void remove() {
+            str.setLength(0);
+            lastCC=0;
+            reorderStart=0;
+        }
+        public void removeSuffix(int suffixLength) {
+            int oldLength=str.length();
+            str.delete(oldLength-suffixLength, oldLength);
+            lastCC=0;
+            reorderStart=str.length();
+        }
+
+        // Inserts c somewhere before the last character.
+        // Requires 0<cc<lastCC which implies reorderStart<limit.
+        private void insert(int c, int cc) {
+            for(setIterator(), skipPrevious(); previousCC()>cc;) {}
+            // insert c at codePointLimit, after the character with prevCC<=cc
+            if(c<=0xffff) {
+                str.insert(codePointLimit, (char)c);
+                if(cc<=1) {
+                    reorderStart=codePointLimit+1;
+                }
+            } else {
+                str.insert(codePointLimit, Character.toChars(c));
+                if(cc<=1) {
+                    reorderStart=codePointLimit+2;
+                }
+            }
+        }
+
+        private final NormalizerImpl impl;
+        private final Appendable app;
+        private final StringBuilder str;
+        private final boolean appIsStringBuilder;
+        private int reorderStart;
+        private int lastCC;
+
+        // private backward iterator
+        private void setIterator() { codePointStart=str.length(); }
+        private void skipPrevious() {  // Requires 0<codePointStart.
+            codePointLimit=codePointStart;
+            codePointStart=str.offsetByCodePoints(codePointStart, -1);
+        }
+        private int previousCC() {  // Returns 0 if there is no previous character.
+            codePointLimit=codePointStart;
+            if(reorderStart>=codePointStart) {
+                return 0;
+            }
+            int c=str.codePointBefore(codePointStart);
+            codePointStart-=Character.charCount(c);
+            return impl.getCCFromYesOrMaybeCP(c);
+        }
+        private int codePointStart, codePointLimit;
+    }
+
+    // TODO: Propose as public API on the UTF16 class.
+    // TODO: Propose widening UTF16 methods that take char to take int.
+    // TODO: Propose widening UTF16 methods that take String to take CharSequence.
+    public static final class UTF16Plus {
+        /**
+         * Is this code point a lead surrogate (U+d800..U+dbff)?
+         * @param c code unit or code point
+         * @return true or false
+         */
+        public static boolean isLeadSurrogate(int c) { return (c & 0xfffffc00) == 0xd800; }
+        /**
+         * Assuming c is a surrogate code point (UTF16.isSurrogate(c)),
+         * is it a lead surrogate?
+         * @param c code unit or code point
+         * @return true or false
+         */
+        public static boolean isSurrogateLead(int c) { return (c&0x400)==0; }
+
+        /**
+         * Compares two CharSequence subsequences for binary equality.
+         * @param s1 first sequence
+         * @param start1 start offset in first sequence
+         * @param limit1 limit offset in first sequence
+         * @param s2 second sequence
+         * @param start2 start offset in second sequence
+         * @param limit2 limit offset in second sequence
+         * @return true if s1.subSequence(start1, limit1) contains the same text
+         *              as s2.subSequence(start2, limit2)
+         */
+        public static boolean equal(CharSequence s1, int start1, int limit1,
+                                    CharSequence s2, int start2, int limit2) {
+            if((limit1-start1)!=(limit2-start2)) {
+                return false;
+            }
+            if(s1==s2 && start1==start2) {
+                return true;
+            }
+            while(start1<limit1) {
+                if(s1.charAt(start1++)!=s2.charAt(start2++)) {
+                    return false;
+                }
+            }
+            return true;
+        }
+    }
+
+    public NormalizerImpl() {}
+
+    private static final class IsAcceptable implements ICUBinary.Authenticate {
+        public boolean isDataVersionAcceptable(byte version[]) {
+            return version[0]==4;
+        }
+    }
+    private static final IsAcceptable IS_ACCEPTABLE = new IsAcceptable();
+    private static final int DATA_FORMAT = 0x4e726d32;  // "Nrm2"
+
+    public NormalizerImpl load(ByteBuffer bytes) {
+        try {
+            dataVersion=ICUBinary.readHeaderAndDataVersion(bytes, DATA_FORMAT, IS_ACCEPTABLE);
+            int indexesLength=bytes.getInt()/4;  // inIndexes[IX_NORM_TRIE_OFFSET]/4
+            if(indexesLength<=IX_MIN_LCCC_CP) {
+                throw new InternalError("Normalizer2 data: not enough indexes");
+            }
+            int[] inIndexes=new int[indexesLength];
+            inIndexes[0]=indexesLength*4;
+            for(int i=1; i<indexesLength; ++i) {
+                inIndexes[i]=bytes.getInt();
+            }
+
+            minDecompNoCP=inIndexes[IX_MIN_DECOMP_NO_CP];
+            minCompNoMaybeCP=inIndexes[IX_MIN_COMP_NO_MAYBE_CP];
+            minLcccCP=inIndexes[IX_MIN_LCCC_CP];
+
+            minYesNo=inIndexes[IX_MIN_YES_NO];
+            minYesNoMappingsOnly=inIndexes[IX_MIN_YES_NO_MAPPINGS_ONLY];
+            minNoNo=inIndexes[IX_MIN_NO_NO];
+            minNoNoCompBoundaryBefore=inIndexes[IX_MIN_NO_NO_COMP_BOUNDARY_BEFORE];
+            minNoNoCompNoMaybeCC=inIndexes[IX_MIN_NO_NO_COMP_NO_MAYBE_CC];
+            minNoNoEmpty=inIndexes[IX_MIN_NO_NO_EMPTY];
+            limitNoNo=inIndexes[IX_LIMIT_NO_NO];
+            minMaybeYes=inIndexes[IX_MIN_MAYBE_YES];
+            assert((minMaybeYes&7)==0);  // 8-aligned for noNoDelta bit fields
+            centerNoNoDelta=(minMaybeYes>>DELTA_SHIFT)-MAX_DELTA-1;
+
+            // Read the normTrie.
+            int offset=inIndexes[IX_NORM_TRIE_OFFSET];
+            int nextOffset=inIndexes[IX_EXTRA_DATA_OFFSET];
+            int triePosition = bytes.position();
+            normTrie = CodePointTrie.Fast16.fromBinary(bytes);
+            int trieLength = bytes.position() - triePosition;
+            if(trieLength>(nextOffset-offset)) {
+                throw new InternalError("Normalizer2 data: not enough bytes for normTrie");
+            }
+            ICUBinary.skipBytes(bytes, (nextOffset-offset)-trieLength);  // skip padding after trie bytes
+
+            // Read the composition and mapping data.
+            offset=nextOffset;
+            nextOffset=inIndexes[IX_SMALL_FCD_OFFSET];
+            int numChars=(nextOffset-offset)/2;
+            if(numChars!=0) {
+                maybeYesCompositions=ICUBinary.getString(bytes, numChars, 0);
+                extraData=maybeYesCompositions.substring((MIN_NORMAL_MAYBE_YES-minMaybeYes)>>OFFSET_SHIFT);
+            }
+
+            // smallFCD: new in formatVersion 2
+            offset=nextOffset;
+            smallFCD=new byte[0x100];
+            bytes.get(smallFCD);
+
+            return this;
+        } catch(IOException e) {
+            throw new InternalError(e);
+        }
+    }
+    public NormalizerImpl load(String name) {
+        return load(ICUBinary.getRequiredData(name));
+    }
+
+    // The trie stores values for lead surrogate code *units*.
+    // Surrogate code *points* are inert.
+    public int getNorm16(int c) {
+        return UTF16Plus.isLeadSurrogate(c) ? INERT : normTrie.get(c);
+    }
+    public int getRawNorm16(int c) { return normTrie.get(c); }
+    public boolean isAlgorithmicNoNo(int norm16) { return limitNoNo<=norm16 && norm16<minMaybeYes; }
+    public boolean isCompNo(int norm16) { return minNoNo<=norm16 && norm16<minMaybeYes; }
+    public boolean isDecompYes(int norm16) { return norm16<minYesNo || minMaybeYes<=norm16; }
+
+    public int getCC(int norm16) {
+        if(norm16>=MIN_NORMAL_MAYBE_YES) {
+            return getCCFromNormalYesOrMaybe(norm16);
+        }
+        if(norm16<minNoNo || limitNoNo<=norm16) {
+            return 0;
+        }
+        return getCCFromNoNo(norm16);
+    }
+    public static int getCCFromNormalYesOrMaybe(int norm16) {
+        return (norm16 >> OFFSET_SHIFT) & 0xff;
+    }
+    public static int getCCFromYesOrMaybe(int norm16) {
+        return norm16>=MIN_NORMAL_MAYBE_YES ? getCCFromNormalYesOrMaybe(norm16) : 0;
+    }
+    public int getCCFromYesOrMaybeCP(int c) {
+        if (c < minCompNoMaybeCP) { return 0; }
+        return getCCFromYesOrMaybe(getNorm16(c));
+    }
+
+    /**
+     * Returns the FCD data for code point c.
+     * @param c A Unicode code point.
+     * @return The lccc(c) in bits 15..8 and tccc(c) in bits 7..0.
+     */
+    public int getFCD16(int c) {
+        if(c<minDecompNoCP) {
+            return 0;
+        } else if(c<=0xffff) {
+            if(!singleLeadMightHaveNonZeroFCD16(c)) { return 0; }
+        }
+        return getFCD16FromNormData(c);
+    }
+    /** Returns true if the single-or-lead code unit c might have non-zero FCD data. */
+    public boolean singleLeadMightHaveNonZeroFCD16(int lead) {
+        // 0<=lead<=0xffff
+        byte bits=smallFCD[lead>>8];
+        if(bits==0) { return false; }
+        return ((bits>>((lead>>5)&7))&1)!=0;
+    }
+
+    /** Gets the FCD value from the regular normalization data. */
+    public int getFCD16FromNormData(int c) {
+        int norm16=getNorm16(c);
+        if (norm16 >= limitNoNo) {
+            if(norm16>=MIN_NORMAL_MAYBE_YES) {
+                // combining mark
+                norm16=getCCFromNormalYesOrMaybe(norm16);
+                return norm16|(norm16<<8);
+            } else if(norm16>=minMaybeYes) {
+                return 0;
+            } else {  // isDecompNoAlgorithmic(norm16)
+                int deltaTrailCC = norm16 & DELTA_TCCC_MASK;
+                if (deltaTrailCC <= DELTA_TCCC_1) {
+                    return deltaTrailCC >> OFFSET_SHIFT;
+                }
+                // Maps to an isCompYesAndZeroCC.
+                c=mapAlgorithmic(c, norm16);
+                norm16=getRawNorm16(c);
+            }
+        }
+        if(norm16<=minYesNo || isHangulLVT(norm16)) {
+            // no decomposition or Hangul syllable, all zeros
+            return 0;
+        }
+        // c decomposes, get everything from the variable-length extra data
+        int mapping=norm16>>OFFSET_SHIFT;
+        int firstUnit=extraData.charAt(mapping);
+        int fcd16=firstUnit>>8;  // tccc
+        if((firstUnit&MAPPING_HAS_CCC_LCCC_WORD)!=0) {
+            fcd16|=extraData.charAt(mapping-1)&0xff00;  // lccc
+        }
+        return fcd16;
+    }
+
+    /**
+     * Gets the decomposition for one code point.
+     * @param c code point
+     * @return c's decomposition, if it has one; returns null if it does not have a decomposition
+     */
+    public String getDecomposition(int c) {
+        int norm16;
+        if(c<minDecompNoCP || isMaybeOrNonZeroCC(norm16=getNorm16(c))) {
+            // c does not decompose
+            return null;
+        }
+        int decomp = -1;
+        if(isDecompNoAlgorithmic(norm16)) {
+            // Maps to an isCompYesAndZeroCC.
+            decomp=c=mapAlgorithmic(c, norm16);
+            // The mapping might decompose further.
+            norm16 = getRawNorm16(c);
+        }
+        if (norm16 < minYesNo) {
+            if(decomp<0) {
+                return null;
+            } else {
+                return UTF16.valueOf(decomp);
+            }
+        } else if(isHangulLV(norm16) || isHangulLVT(norm16)) {
+            // Hangul syllable: decompose algorithmically
+            StringBuilder buffer=new StringBuilder();
+            Hangul.decompose(c, buffer);
+            return buffer.toString();
+        }
+        // c decomposes, get everything from the variable-length extra data
+        int mapping=norm16>>OFFSET_SHIFT;
+        int length=extraData.charAt(mapping++)&MAPPING_LENGTH_MASK;
+        return extraData.substring(mapping, mapping+length);
+    }
+
+    // Fixed norm16 values.
+    public static final int MIN_YES_YES_WITH_CC=0xfe02;
+    public static final int JAMO_VT=0xfe00;
+    public static final int MIN_NORMAL_MAYBE_YES=0xfc00;
+    public static final int JAMO_L=2;  // offset=1 hasCompBoundaryAfter=false
+    public static final int INERT=1;  // offset=0 hasCompBoundaryAfter=true
+
+    // norm16 bit 0 is comp-boundary-after.
+    public static final int HAS_COMP_BOUNDARY_AFTER=1;
+    public static final int OFFSET_SHIFT=1;
+
+    // For algorithmic one-way mappings, norm16 bits 2..1 indicate the
+    // tccc (0, 1, >1) for quick FCC boundary-after tests.
+    public static final int DELTA_TCCC_0=0;
+    public static final int DELTA_TCCC_1=2;
+    public static final int DELTA_TCCC_GT_1=4;
+    public static final int DELTA_TCCC_MASK=6;
+    public static final int DELTA_SHIFT=3;
+
+    public static final int MAX_DELTA=0x40;
+
+    // Byte offsets from the start of the data, after the generic header.
+    public static final int IX_NORM_TRIE_OFFSET=0;
+    public static final int IX_EXTRA_DATA_OFFSET=1;
+    public static final int IX_SMALL_FCD_OFFSET=2;
+    public static final int IX_RESERVED3_OFFSET=3;
+    public static final int IX_TOTAL_SIZE=7;
+    public static final int MIN_CCC_LCCC_CP=0x300;
+    // Code point thresholds for quick check codes.
+    public static final int IX_MIN_DECOMP_NO_CP=8;
+    public static final int IX_MIN_COMP_NO_MAYBE_CP=9;
+
+    // Norm16 value thresholds for quick check combinations and types of extra data.
+
+    /** Mappings & compositions in [minYesNo..minYesNoMappingsOnly[. */
+    public static final int IX_MIN_YES_NO=10;
+    /** Mappings are comp-normalized. */
+    public static final int IX_MIN_NO_NO=11;
+    public static final int IX_LIMIT_NO_NO=12;
+    public static final int IX_MIN_MAYBE_YES=13;
+
+    /** Mappings only in [minYesNoMappingsOnly..minNoNo[. */
+    public static final int IX_MIN_YES_NO_MAPPINGS_ONLY=14;
+    /** Mappings are not comp-normalized but have a comp boundary before. */
+    public static final int IX_MIN_NO_NO_COMP_BOUNDARY_BEFORE=15;
+    /** Mappings do not have a comp boundary before. */
+    public static final int IX_MIN_NO_NO_COMP_NO_MAYBE_CC=16;
+    /** Mappings to the empty string. */
+    public static final int IX_MIN_NO_NO_EMPTY=17;
+
+    public static final int IX_MIN_LCCC_CP=18;
+    public static final int IX_COUNT=20;
+
+    public static final int MAPPING_HAS_CCC_LCCC_WORD=0x80;
+    public static final int MAPPING_HAS_RAW_MAPPING=0x40;
+    // unused bit 0x20;
+    public static final int MAPPING_LENGTH_MASK=0x1f;
+
+    public static final int COMP_1_LAST_TUPLE=0x8000;
+    public static final int COMP_1_TRIPLE=1;
+    public static final int COMP_1_TRAIL_LIMIT=0x3400;
+    public static final int COMP_1_TRAIL_MASK=0x7ffe;
+    public static final int COMP_1_TRAIL_SHIFT=9;  // 10-1 for the "triple" bit
+    public static final int COMP_2_TRAIL_SHIFT=6;
+    public static final int COMP_2_TRAIL_MASK=0xffc0;
+
+    // higher-level functionality ------------------------------------------ ***
+
+    /**
+     * Decomposes s[src, limit[ and writes the result to dest.
+     * limit can be NULL if src is NUL-terminated.
+     * destLengthEstimate is the initial dest buffer capacity and can be -1.
+     */
+    public void decompose(CharSequence s, int src, int limit, StringBuilder dest,
+                   int destLengthEstimate) {
+        if(destLengthEstimate<0) {
+            destLengthEstimate=limit-src;
+        }
+        dest.setLength(0);
+        ReorderingBuffer buffer=new ReorderingBuffer(this, dest, destLengthEstimate);
+        decompose(s, src, limit, buffer);
+    }
+
+    // Dual functionality:
+    // buffer!=NULL: normalize
+    // buffer==NULL: isNormalized/quickCheck/spanQuickCheckYes
+    public int decompose(CharSequence s, int src, int limit,
+                         ReorderingBuffer buffer) {
+        int minNoCP=minDecompNoCP;
+
+        int prevSrc;
+        int c=0;
+        int norm16=0;
+
+        // only for quick check
+        int prevBoundary=src;
+        int prevCC=0;
+
+        for(;;) {
+            // count code units below the minimum or with irrelevant data for the quick check
+            for(prevSrc=src; src!=limit;) {
+                if( (c=s.charAt(src))<minNoCP ||
+                    isMostDecompYesAndZeroCC(norm16=normTrie.bmpGet(c))
+                ) {
+                    ++src;
+                } else if(!UTF16Plus.isLeadSurrogate(c)) {
+                    break;
+                } else {
+                    char c2;
+                    if ((src + 1) != limit && Character.isLowSurrogate(c2 = s.charAt(src + 1))) {
+                        c = Character.toCodePoint((char)c, c2);
+                        norm16 = normTrie.suppGet(c);
+                        if (isMostDecompYesAndZeroCC(norm16)) {
+                            src += 2;
+                        } else {
+                            break;
+                        }
+                    } else {
+                        ++src;  // unpaired lead surrogate: inert
+                    }
+                }
+            }
+            // copy these code units all at once
+            if(src!=prevSrc) {
+                if(buffer!=null) {
+                    buffer.flushAndAppendZeroCC(s, prevSrc, src);
+                } else {
+                    prevCC=0;
+                    prevBoundary=src;
+                }
+            }
+            if(src==limit) {
+                break;
+            }
+
+            // Check one above-minimum, relevant code point.
+            src+=Character.charCount(c);
+            if(buffer!=null) {
+                decompose(c, norm16, buffer);
+            } else {
+                if(isDecompYes(norm16)) {
+                    int cc=getCCFromYesOrMaybe(norm16);
+                    if(prevCC<=cc || cc==0) {
+                        prevCC=cc;
+                        if(cc<=1) {
+                            prevBoundary=src;
+                        }
+                        continue;
+                    }
+                }
+                return prevBoundary;  // "no" or cc out of order
+            }
+        }
+        return src;
+    }
+    public void decomposeAndAppend(CharSequence s, boolean doDecompose, ReorderingBuffer buffer) {
+        int limit=s.length();
+        if(limit==0) {
+            return;
+        }
+        if(doDecompose) {
+            decompose(s, 0, limit, buffer);
+            return;
+        }
+        // Just merge the strings at the boundary.
+        int c=Character.codePointAt(s, 0);
+        int src=0;
+        int firstCC, prevCC, cc;
+        firstCC=prevCC=cc=getCC(getNorm16(c));
+        while(cc!=0) {
+            prevCC=cc;
+            src+=Character.charCount(c);
+            if(src>=limit) {
+                break;
+            }
+            c=Character.codePointAt(s, src);
+            cc=getCC(getNorm16(c));
+        };
+        buffer.append(s, 0, src, false, firstCC, prevCC);
+        buffer.append(s, src, limit);
+    }
+
+    // Very similar to composeQuickCheck(): Make the same changes in both places if relevant.
+    // doCompose: normalize
+    // !doCompose: isNormalized (buffer must be empty and initialized)
+    public boolean compose(CharSequence s, int src, int limit,
+                           boolean onlyContiguous,
+                           boolean doCompose,
+                           ReorderingBuffer buffer) {
+        int prevBoundary=src;
+        int minNoMaybeCP=minCompNoMaybeCP;
+
+        for (;;) {
+            // Fast path: Scan over a sequence of characters below the minimum "no or maybe" code point,
+            // or with (compYes && ccc==0) properties.
+            int prevSrc;
+            int c = 0;
+            int norm16 = 0;
+            for (;;) {
+                if (src == limit) {
+                    if (prevBoundary != limit && doCompose) {
+                        buffer.append(s, prevBoundary, limit);
+                    }
+                    return true;
+                }
+                if( (c=s.charAt(src))<minNoMaybeCP ||
+                    isCompYesAndZeroCC(norm16=normTrie.bmpGet(c))
+                ) {
+                    ++src;
+                } else {
+                    prevSrc = src++;
+                    if (!UTF16Plus.isLeadSurrogate(c)) {
+                        break;
+                    } else {
+                        char c2;
+                        if (src != limit && Character.isLowSurrogate(c2 = s.charAt(src))) {
+                            ++src;
+                            c = Character.toCodePoint((char)c, c2);
+                            norm16 = normTrie.suppGet(c);
+                            if (!isCompYesAndZeroCC(norm16)) {
+                                break;
+                            }
+                        }
+                    }
+                }
+            }
+            // isCompYesAndZeroCC(norm16) is false, that is, norm16>=minNoNo.
+            // The current character is either a "noNo" (has a mapping)
+            // or a "maybeYes" (combines backward)
+            // or a "yesYes" with ccc!=0.
+            // It is not a Hangul syllable or Jamo L because those have "yes" properties.
+
+            // Medium-fast path: Handle cases that do not require full decomposition and recomposition.
+            if (!isMaybeOrNonZeroCC(norm16)) {  // minNoNo <= norm16 < minMaybeYes
+                if (!doCompose) {
+                    return false;
+                }
+                // Fast path for mapping a character that is immediately surrounded by boundaries.
+                // In this case, we need not decompose around the current character.
+                if (isDecompNoAlgorithmic(norm16)) {
+                    // Maps to a single isCompYesAndZeroCC character
+                    // which also implies hasCompBoundaryBefore.
+                    if (norm16HasCompBoundaryAfter(norm16, onlyContiguous) ||
+                            hasCompBoundaryBefore(s, src, limit)) {
+                        if (prevBoundary != prevSrc) {
+                            buffer.append(s, prevBoundary, prevSrc);
+                        }
+                        buffer.append(mapAlgorithmic(c, norm16), 0);
+                        prevBoundary = src;
+                        continue;
+                    }
+                } else if (norm16 < minNoNoCompBoundaryBefore) {
+                    // The mapping is comp-normalized which also implies hasCompBoundaryBefore.
+                    if (norm16HasCompBoundaryAfter(norm16, onlyContiguous) ||
+                            hasCompBoundaryBefore(s, src, limit)) {
+                        if (prevBoundary != prevSrc) {
+                            buffer.append(s, prevBoundary, prevSrc);
+                        }
+                        int mapping = norm16 >> OFFSET_SHIFT;
+                        int length = extraData.charAt(mapping++) & MAPPING_LENGTH_MASK;
+                        buffer.append(extraData, mapping, mapping + length);
+                        prevBoundary = src;
+                        continue;
+                    }
+                } else if (norm16 >= minNoNoEmpty) {
+                    // The current character maps to nothing.
+                    // Simply omit it from the output if there is a boundary before _or_ after it.
+                    // The character itself implies no boundaries.
+                    if (hasCompBoundaryBefore(s, src, limit) ||
+                            hasCompBoundaryAfter(s, prevBoundary, prevSrc, onlyContiguous)) {
+                        if (prevBoundary != prevSrc) {
+                            buffer.append(s, prevBoundary, prevSrc);
+                        }
+                        prevBoundary = src;
+                        continue;
+                    }
+                }
+                // Other "noNo" type, or need to examine more text around this character:
+                // Fall through to the slow path.
+            } else if (isJamoVT(norm16) && prevBoundary != prevSrc) {
+                char prev=s.charAt(prevSrc-1);
+                if(c<Hangul.JAMO_T_BASE) {
+                    // The current character is a Jamo Vowel,
+                    // compose with previous Jamo L and following Jamo T.
+                    char l = (char)(prev-Hangul.JAMO_L_BASE);
+                    if(l<Hangul.JAMO_L_COUNT) {
+                        if (!doCompose) {
+                            return false;
+                        }
+                        int t;
+                        if (src != limit &&
+                                0 < (t = (s.charAt(src) - Hangul.JAMO_T_BASE)) &&
+                                t < Hangul.JAMO_T_COUNT) {
+                            // The next character is a Jamo T.
+                            ++src;
+                        } else if (hasCompBoundaryBefore(s, src, limit)) {
+                            // No Jamo T follows, not even via decomposition.
+                            t = 0;
+                        } else {
+                            t = -1;
+                        }
+                        if (t >= 0) {
+                            int syllable = Hangul.HANGUL_BASE +
+                                (l*Hangul.JAMO_V_COUNT + (c-Hangul.JAMO_V_BASE)) *
+                                Hangul.JAMO_T_COUNT + t;
+                            --prevSrc;  // Replace the Jamo L as well.
+                            if (prevBoundary != prevSrc) {
+                                buffer.append(s, prevBoundary, prevSrc);
+                            }
+                            buffer.append((char)syllable);
+                            prevBoundary = src;
+                            continue;
+                        }
+                        // If we see L+V+x where x!=T then we drop to the slow path,
+                        // decompose and recompose.
+                        // This is to deal with NFKC finding normal L and V but a
+                        // compatibility variant of a T.
+                        // We need to either fully compose that combination here
+                        // (which would complicate the code and may not work with strange custom data)
+                        // or use the slow path.
+                    }
+                } else if (Hangul.isHangulLV(prev)) {
+                    // The current character is a Jamo Trailing consonant,
+                    // compose with previous Hangul LV that does not contain a Jamo T.
+                    if (!doCompose) {
+                        return false;
+                    }
+                    int syllable = prev + c - Hangul.JAMO_T_BASE;
+                    --prevSrc;  // Replace the Hangul LV as well.
+                    if (prevBoundary != prevSrc) {
+                        buffer.append(s, prevBoundary, prevSrc);
+                    }
+                    buffer.append((char)syllable);
+                    prevBoundary = src;
+                    continue;
+                }
+                // No matching context, or may need to decompose surrounding text first:
+                // Fall through to the slow path.
+            } else if (norm16 > JAMO_VT) {  // norm16 >= MIN_YES_YES_WITH_CC
+                // One or more combining marks that do not combine-back:
+                // Check for canonical order, copy unchanged if ok and
+                // if followed by a character with a boundary-before.
+                int cc = getCCFromNormalYesOrMaybe(norm16);  // cc!=0
+                if (onlyContiguous /* FCC */ && getPreviousTrailCC(s, prevBoundary, prevSrc) > cc) {
+                    // Fails FCD test, need to decompose and contiguously recompose.
+                    if (!doCompose) {
+                        return false;
+                    }
+                } else {
+                    // If !onlyContiguous (not FCC), then we ignore the tccc of
+                    // the previous character which passed the quick check "yes && ccc==0" test.
+                    int n16;
+                    for (;;) {
+                        if (src == limit) {
+                            if (doCompose) {
+                                buffer.append(s, prevBoundary, limit);
+                            }
+                            return true;
+                        }
+                        int prevCC = cc;
+                        c = Character.codePointAt(s, src);
+                        n16 = normTrie.get(c);
+                        if (n16 >= MIN_YES_YES_WITH_CC) {
+                            cc = getCCFromNormalYesOrMaybe(n16);
+                            if (prevCC > cc) {
+                                if (!doCompose) {
+                                    return false;
+                                }
+                                break;
+                            }
+                        } else {
+                            break;
+                        }
+                        src += Character.charCount(c);
+                    }
+                    // p is after the last in-order combining mark.
+                    // If there is a boundary here, then we continue with no change.
+                    if (norm16HasCompBoundaryBefore(n16)) {
+                        if (isCompYesAndZeroCC(n16)) {
+                            src += Character.charCount(c);
+                        }
+                        continue;
+                    }
+                    // Use the slow path. There is no boundary in [prevSrc, src[.
+                }
+            }
+
+            // Slow path: Find the nearest boundaries around the current character,
+            // decompose and recompose.
+            if (prevBoundary != prevSrc && !norm16HasCompBoundaryBefore(norm16)) {
+                c = Character.codePointBefore(s, prevSrc);
+                norm16 = normTrie.get(c);
+                if (!norm16HasCompBoundaryAfter(norm16, onlyContiguous)) {
+                    prevSrc -= Character.charCount(c);
+                }
+            }
+            if (doCompose && prevBoundary != prevSrc) {
+                buffer.append(s, prevBoundary, prevSrc);
+            }
+            int recomposeStartIndex=buffer.length();
+            // We know there is not a boundary here.
+            decomposeShort(s, prevSrc, src, false /* !stopAtCompBoundary */, onlyContiguous,
+                           buffer);
+            // Decompose until the next boundary.
+            src = decomposeShort(s, src, limit, true /* stopAtCompBoundary */, onlyContiguous,
+                                 buffer);
+            recompose(buffer, recomposeStartIndex, onlyContiguous);
+            if(!doCompose) {
+                if(!buffer.equals(s, prevSrc, src)) {
+                    return false;
+                }
+                buffer.remove();
+            }
+            prevBoundary=src;
+        }
+    }
+
+    /**
+     * Very similar to compose(): Make the same changes in both places if relevant.
+     * doSpan: spanQuickCheckYes (ignore bit 0 of the return value)
+     * !doSpan: quickCheck
+     * @return bits 31..1: spanQuickCheckYes (==s.length() if "yes") and
+     *         bit 0: set if "maybe"; otherwise, if the span length&lt;s.length()
+     *         then the quick check result is "no"
+     */
+    public int composeQuickCheck(CharSequence s, int src, int limit,
+                                 boolean onlyContiguous, boolean doSpan) {
+        int qcResult=0;
+        int prevBoundary=src;
+        int minNoMaybeCP=minCompNoMaybeCP;
+
+        for(;;) {
+            // Fast path: Scan over a sequence of characters below the minimum "no or maybe" code point,
+            // or with (compYes && ccc==0) properties.
+            int prevSrc;
+            int c = 0;
+            int norm16 = 0;
+            for (;;) {
+                if(src==limit) {
+                    return (src<<1)|qcResult;  // "yes" or "maybe"
+                }
+                if( (c=s.charAt(src))<minNoMaybeCP ||
+                    isCompYesAndZeroCC(norm16=normTrie.bmpGet(c))
+                ) {
+                    ++src;
+                } else {
+                    prevSrc = src++;
+                    if (!UTF16Plus.isLeadSurrogate(c)) {
+                        break;
+                    } else {
+                        char c2;
+                        if (src != limit && Character.isLowSurrogate(c2 = s.charAt(src))) {
+                            ++src;
+                            c = Character.toCodePoint((char)c, c2);
+                            norm16 = normTrie.suppGet(c);
+                            if (!isCompYesAndZeroCC(norm16)) {
+                                break;
+                            }
+                        }
+                    }
+                }
+            }
+            // isCompYesAndZeroCC(norm16) is false, that is, norm16>=minNoNo.
+            // The current character is either a "noNo" (has a mapping)
+            // or a "maybeYes" (combines backward)
+            // or a "yesYes" with ccc!=0.
+            // It is not a Hangul syllable or Jamo L because those have "yes" properties.
+
+            int prevNorm16 = INERT;
+            if (prevBoundary != prevSrc) {
+                prevBoundary = prevSrc;
+                if (!norm16HasCompBoundaryBefore(norm16)) {
+                    c = Character.codePointBefore(s, prevSrc);
+                    int n16 = getNorm16(c);
+                    if (!norm16HasCompBoundaryAfter(n16, onlyContiguous)) {
+                        prevBoundary -= Character.charCount(c);
+                        prevNorm16 = n16;
+                    }
+                }
+            }
+
+            if(isMaybeOrNonZeroCC(norm16)) {
+                int cc=getCCFromYesOrMaybe(norm16);
+                if (onlyContiguous /* FCC */ && cc != 0 &&
+                        getTrailCCFromCompYesAndZeroCC(prevNorm16) > cc) {
+                    // The [prevBoundary..prevSrc[ character
+                    // passed the quick check "yes && ccc==0" test
+                    // but is out of canonical order with the current combining mark.
+                } else {
+                    // If !onlyContiguous (not FCC), then we ignore the tccc of
+                    // the previous character which passed the quick check "yes && ccc==0" test.
+                    for (;;) {
+                        if (norm16 < MIN_YES_YES_WITH_CC) {
+                            if (!doSpan) {
+                                qcResult = 1;
+                            } else {
+                                return prevBoundary << 1;  // spanYes does not care to know it's "maybe"
+                            }
+                        }
+                        if (src == limit) {
+                            return (src<<1) | qcResult;  // "yes" or "maybe"
+                        }
+                        int prevCC = cc;
+                        c = Character.codePointAt(s, src);
+                        norm16 = getNorm16(c);
+                        if (isMaybeOrNonZeroCC(norm16)) {
+                            cc = getCCFromYesOrMaybe(norm16);
+                            if (!(prevCC <= cc || cc == 0)) {
+                                break;
+                            }
+                        } else {
+                            break;
+                        }
+                        src += Character.charCount(c);
+                    }
+                    // src is after the last in-order combining mark.
+                    if (isCompYesAndZeroCC(norm16)) {
+                        prevBoundary = src;
+                        src += Character.charCount(c);
+                        continue;
+                    }
+                }
+            }
+            return prevBoundary<<1;  // "no"
+        }
+    }
+    public void composeAndAppend(CharSequence s,
+                                 boolean doCompose,
+                                 boolean onlyContiguous,
+                                 ReorderingBuffer buffer) {
+        int src=0, limit=s.length();
+        if(!buffer.isEmpty()) {
+            int firstStarterInSrc=findNextCompBoundary(s, 0, limit, onlyContiguous);
+            if(0!=firstStarterInSrc) {
+                int lastStarterInDest=findPreviousCompBoundary(buffer.getStringBuilder(),
+                                                               buffer.length(), onlyContiguous);
+                StringBuilder middle=new StringBuilder((buffer.length()-lastStarterInDest)+
+                                                       firstStarterInSrc+16);
+                middle.append(buffer.getStringBuilder(), lastStarterInDest, buffer.length());
+                buffer.removeSuffix(buffer.length()-lastStarterInDest);
+                middle.append(s, 0, firstStarterInSrc);
+                compose(middle, 0, middle.length(), onlyContiguous, true, buffer);
+                src=firstStarterInSrc;
+            }
+        }
+        if(doCompose) {
+            compose(s, src, limit, onlyContiguous, true, buffer);
+        } else {
+            buffer.append(s, src, limit);
+        }
+    }
+    // Dual functionality:
+    // buffer!=NULL: normalize
+    // buffer==NULL: isNormalized/quickCheck/spanQuickCheckYes
+    public int makeFCD(CharSequence s, int src, int limit, ReorderingBuffer buffer) {
+        // Note: In this function we use buffer->appendZeroCC() because we track
+        // the lead and trail combining classes here, rather than leaving it to
+        // the ReorderingBuffer.
+        // The exception is the call to decomposeShort() which uses the buffer
+        // in the normal way.
+
+        // Tracks the last FCD-safe boundary, before lccc=0 or after properly-ordered tccc<=1.
+        // Similar to the prevBoundary in the compose() implementation.
+        int prevBoundary=src;
+        int prevSrc;
+        int c=0;
+        int prevFCD16=0;
+        int fcd16=0;
+
+        for(;;) {
+            // count code units with lccc==0
+            for(prevSrc=src; src!=limit;) {
+                if((c=s.charAt(src))<minLcccCP) {
+                    prevFCD16=~c;
+                    ++src;
+                } else if(!singleLeadMightHaveNonZeroFCD16(c)) {
+                    prevFCD16=0;
+                    ++src;
+                } else {
+                    if (UTF16Plus.isLeadSurrogate(c)) {
+                        char c2;
+                        if ((src + 1) != limit && Character.isLowSurrogate(c2 = s.charAt(src + 1))) {
+                            c = Character.toCodePoint((char)c, c2);
+                        }
+                    }
+                    if((fcd16=getFCD16FromNormData(c))<=0xff) {
+                        prevFCD16=fcd16;
+                        src+=Character.charCount(c);
+                    } else {
+                        break;
+                    }
+                }
+            }
+            // copy these code units all at once
+            if(src!=prevSrc) {
+                if(src==limit) {
+                    if(buffer!=null) {
+                        buffer.flushAndAppendZeroCC(s, prevSrc, src);
+                    }
+                    break;
+                }
+                prevBoundary=src;
+                // We know that the previous character's lccc==0.
+                if(prevFCD16<0) {
+                    // Fetching the fcd16 value was deferred for this below-minLcccCP code point.
+                    int prev=~prevFCD16;
+                    if(prev<minDecompNoCP) {
+                        prevFCD16=0;
+                    } else {
+                        prevFCD16=getFCD16FromNormData(prev);
+                        if(prevFCD16>1) {
+                            --prevBoundary;
+                        }
+                    }
+                } else {
+                    int p=src-1;
+                    if( Character.isLowSurrogate(s.charAt(p)) && prevSrc<p &&
+                        Character.isHighSurrogate(s.charAt(p-1))
+                    ) {
+                        --p;
+                        // Need to fetch the previous character's FCD value because
+                        // prevFCD16 was just for the trail surrogate code point.
+                        prevFCD16=getFCD16FromNormData(Character.toCodePoint(s.charAt(p), s.charAt(p+1)));
+                        // Still known to have lccc==0 because its lead surrogate unit had lccc==0.
+                    }
+                    if(prevFCD16>1) {
+                        prevBoundary=p;
+                    }
+                }
+                if(buffer!=null) {
+                    // The last lccc==0 character is excluded from the
+                    // flush-and-append call in case it needs to be modified.
+                    buffer.flushAndAppendZeroCC(s, prevSrc, prevBoundary);
+                    buffer.append(s, prevBoundary, src);
+                }
+                // The start of the current character (c).
+                prevSrc=src;
+            } else if(src==limit) {
+                break;
+            }
+
+            src+=Character.charCount(c);
+            // The current character (c) at [prevSrc..src[ has a non-zero lead combining class.
+            // Check for proper order, and decompose locally if necessary.
+            if((prevFCD16&0xff)<=(fcd16>>8)) {
+                // proper order: prev tccc <= current lccc
+                if((fcd16&0xff)<=1) {
+                    prevBoundary=src;
+                }
+                if(buffer!=null) {
+                    buffer.appendZeroCC(c);
+                }
+                prevFCD16=fcd16;
+                continue;
+            } else if(buffer==null) {
+                return prevBoundary;  // quick check "no"
+            } else {
+                /*
+                 * Back out the part of the source that we copied or appended
+                 * already but is now going to be decomposed.
+                 * prevSrc is set to after what was copied/appended.
+                 */
+                buffer.removeSuffix(prevSrc-prevBoundary);
+                /*
+                 * Find the part of the source that needs to be decomposed,
+                 * up to the next safe boundary.
+                 */
+                src=findNextFCDBoundary(s, src, limit);
+                /*
+                 * The source text does not fulfill the conditions for FCD.
+                 * Decompose and reorder a limited piece of the text.
+                 */
+                decomposeShort(s, prevBoundary, src, false, false, buffer);
+                prevBoundary=src;
+                prevFCD16=0;
+            }
+        }
+        return src;
+    }
+
+    public boolean hasDecompBoundaryBefore(int c) {
+        return c < minLcccCP || (c <= 0xffff && !singleLeadMightHaveNonZeroFCD16(c)) ||
+            norm16HasDecompBoundaryBefore(getNorm16(c));
+    }
+    public boolean norm16HasDecompBoundaryBefore(int norm16) {
+        if (norm16 < minNoNoCompNoMaybeCC) {
+            return true;
+        }
+        if (norm16 >= limitNoNo) {
+            return norm16 <= MIN_NORMAL_MAYBE_YES || norm16 == JAMO_VT;
+        }
+        // c decomposes, get everything from the variable-length extra data
+        int mapping=norm16>>OFFSET_SHIFT;
+        int firstUnit=extraData.charAt(mapping);
+        // true if leadCC==0 (hasFCDBoundaryBefore())
+        return (firstUnit&MAPPING_HAS_CCC_LCCC_WORD)==0 || (extraData.charAt(mapping-1)&0xff00)==0;
+    }
+    public boolean hasDecompBoundaryAfter(int c) {
+        if (c < minDecompNoCP) {
+            return true;
+        }
+        if (c <= 0xffff && !singleLeadMightHaveNonZeroFCD16(c)) {
+            return true;
+        }
+        return norm16HasDecompBoundaryAfter(getNorm16(c));
+    }
+    public boolean norm16HasDecompBoundaryAfter(int norm16) {
+        if(norm16 <= minYesNo || isHangulLVT(norm16)) {
+            return true;
+        }
+        if (norm16 >= limitNoNo) {
+            if (isMaybeOrNonZeroCC(norm16)) {
+                return norm16 <= MIN_NORMAL_MAYBE_YES || norm16 == JAMO_VT;
+            }
+            // Maps to an isCompYesAndZeroCC.
+            return (norm16 & DELTA_TCCC_MASK) <= DELTA_TCCC_1;
+        }
+        // c decomposes, get everything from the variable-length extra data
+        int mapping=norm16>>OFFSET_SHIFT;
+        int firstUnit=extraData.charAt(mapping);
+        // decomp after-boundary: same as hasFCDBoundaryAfter(),
+        // fcd16<=1 || trailCC==0
+        if(firstUnit>0x1ff) {
+            return false;  // trailCC>1
+        }
+        if(firstUnit<=0xff) {
+            return true;  // trailCC==0
+        }
+        // if(trailCC==1) test leadCC==0, same as checking for before-boundary
+        // true if leadCC==0 (hasFCDBoundaryBefore())
+        return (firstUnit&MAPPING_HAS_CCC_LCCC_WORD)==0 || (extraData.charAt(mapping-1)&0xff00)==0;
+    }
+    public boolean isDecompInert(int c) { return isDecompYesAndZeroCC(getNorm16(c)); }
+
+    public boolean hasCompBoundaryBefore(int c) {
+        return c<minCompNoMaybeCP || norm16HasCompBoundaryBefore(getNorm16(c));
+    }
+    public boolean hasCompBoundaryAfter(int c, boolean onlyContiguous) {
+        return norm16HasCompBoundaryAfter(getNorm16(c), onlyContiguous);
+    }
+
+    private boolean isMaybe(int norm16) { return minMaybeYes<=norm16 && norm16<=JAMO_VT; }
+    private boolean isMaybeOrNonZeroCC(int norm16) { return norm16>=minMaybeYes; }
+    private static boolean isInert(int norm16) { return norm16==INERT; }
+    private static boolean isJamoVT(int norm16) { return norm16==JAMO_VT; }
+    private int hangulLVT() { return minYesNoMappingsOnly|HAS_COMP_BOUNDARY_AFTER; }
+    private boolean isHangulLV(int norm16) { return norm16==minYesNo; }
+    private boolean isHangulLVT(int norm16) {
+        return norm16==hangulLVT();
+    }
+    private boolean isCompYesAndZeroCC(int norm16) { return norm16<minNoNo; }
+    // UBool isCompYes(uint16_t norm16) const {
+    //     return norm16>=MIN_YES_YES_WITH_CC || norm16<minNoNo;
+    // }
+    // UBool isCompYesOrMaybe(uint16_t norm16) const {
+    //     return norm16<minNoNo || minMaybeYes<=norm16;
+    // }
+    // private boolean hasZeroCCFromDecompYes(int norm16) {
+    //     return norm16<=MIN_NORMAL_MAYBE_YES || norm16==JAMO_VT;
+    // }
+    private boolean isDecompYesAndZeroCC(int norm16) {
+        return norm16<minYesNo ||
+               norm16==JAMO_VT ||
+               (minMaybeYes<=norm16 && norm16<=MIN_NORMAL_MAYBE_YES);
+    }
+    /**
+     * A little faster and simpler than isDecompYesAndZeroCC() but does not include
+     * the MaybeYes which combine-forward and have ccc=0.
+     * (Standard Unicode 10 normalization does not have such characters.)
+     */
+    private boolean isMostDecompYesAndZeroCC(int norm16) {
+        return norm16<minYesNo || norm16==MIN_NORMAL_MAYBE_YES || norm16==JAMO_VT;
+    }
+    private boolean isDecompNoAlgorithmic(int norm16) { return norm16>=limitNoNo; }
+
+    // For use with isCompYes().
+    // Perhaps the compiler can combine the two tests for MIN_YES_YES_WITH_CC.
+    // static uint8_t getCCFromYes(uint16_t norm16) {
+    //     return norm16>=MIN_YES_YES_WITH_CC ? getCCFromNormalYesOrMaybe(norm16) : 0;
+    // }
+    private int getCCFromNoNo(int norm16) {
+        int mapping=norm16>>OFFSET_SHIFT;
+        if((extraData.charAt(mapping)&MAPPING_HAS_CCC_LCCC_WORD)!=0) {
+            return extraData.charAt(mapping-1)&0xff;
+        } else {
+            return 0;
+        }
+    }
+    int getTrailCCFromCompYesAndZeroCC(int norm16) {
+        if(norm16<=minYesNo) {
+            return 0;  // yesYes and Hangul LV have ccc=tccc=0
+        } else {
+            // For Hangul LVT we harmlessly fetch a firstUnit with tccc=0 here.
+            return extraData.charAt(norm16>>OFFSET_SHIFT)>>8;  // tccc from yesNo
+        }
+    }
+
+    // Requires algorithmic-NoNo.
+    private int mapAlgorithmic(int c, int norm16) {
+        return c+(norm16>>DELTA_SHIFT)-centerNoNoDelta;
+    }
+
+    // Requires minYesNo<norm16<limitNoNo.
+    // private int getMapping(int norm16) { return extraData+(norm16>>OFFSET_SHIFT); }
+
+    /**
+     * @return index into maybeYesCompositions, or -1
+     */
+    private int getCompositionsListForDecompYes(int norm16) {
+        if(norm16<JAMO_L || MIN_NORMAL_MAYBE_YES<=norm16) {
+            return -1;
+        } else {
+            if((norm16-=minMaybeYes)<0) {
+                // norm16<minMaybeYes: index into extraData which is a substring at
+                //     maybeYesCompositions[MIN_NORMAL_MAYBE_YES-minMaybeYes]
+                // same as (MIN_NORMAL_MAYBE_YES-minMaybeYes)+norm16
+                norm16+=MIN_NORMAL_MAYBE_YES;  // for yesYes; if Jamo L: harmless empty list
+            }
+            return norm16>>OFFSET_SHIFT;
+        }
+    }
+    /**
+     * @return index into maybeYesCompositions
+     */
+    private int getCompositionsListForComposite(int norm16) {
+        // A composite has both mapping & compositions list.
+        int list=((MIN_NORMAL_MAYBE_YES-minMaybeYes)+norm16)>>OFFSET_SHIFT;
+        int firstUnit=maybeYesCompositions.charAt(list);
+        return list+  // mapping in maybeYesCompositions
+            1+  // +1 to skip the first unit with the mapping length
+            (firstUnit&MAPPING_LENGTH_MASK);  // + mapping length
+    }
+
+    // Decompose a short piece of text which is likely to contain characters that
+    // fail the quick check loop and/or where the quick check loop's overhead
+    // is unlikely to be amortized.
+    // Called by the compose() and makeFCD() implementations.
+    // Public in Java for collation implementation code.
+    private int decomposeShort(
+            CharSequence s, int src, int limit,
+            boolean stopAtCompBoundary, boolean onlyContiguous,
+            ReorderingBuffer buffer) {
+        while(src<limit) {
+            int c=Character.codePointAt(s, src);
+            if (stopAtCompBoundary && c < minCompNoMaybeCP) {
+                return src;
+            }
+            int norm16 = getNorm16(c);
+            if (stopAtCompBoundary && norm16HasCompBoundaryBefore(norm16)) {
+                return src;
+            }
+            src+=Character.charCount(c);
+            decompose(c, norm16, buffer);
+            if (stopAtCompBoundary && norm16HasCompBoundaryAfter(norm16, onlyContiguous)) {
+                return src;
+            }
+        }
+        return src;
+    }
+    private void decompose(int c, int norm16, ReorderingBuffer buffer) {
+        // get the decomposition and the lead and trail cc's
+        if (norm16 >= limitNoNo) {
+            if (isMaybeOrNonZeroCC(norm16)) {
+                buffer.append(c, getCCFromYesOrMaybe(norm16));
+                return;
+            }
+            // Maps to an isCompYesAndZeroCC.
+            c=mapAlgorithmic(c, norm16);
+            norm16=getRawNorm16(c);
+        }
+        if (norm16 < minYesNo) {
+            // c does not decompose
+            buffer.append(c, 0);
+        } else if(isHangulLV(norm16) || isHangulLVT(norm16)) {
+            // Hangul syllable: decompose algorithmically
+            Hangul.decompose(c, buffer);
+        } else {
+            // c decomposes, get everything from the variable-length extra data
+            int mapping=norm16>>OFFSET_SHIFT;
+            int firstUnit=extraData.charAt(mapping);
+            int length=firstUnit&MAPPING_LENGTH_MASK;
+            int leadCC, trailCC;
+            trailCC=firstUnit>>8;
+            if((firstUnit&MAPPING_HAS_CCC_LCCC_WORD)!=0) {
+                leadCC=extraData.charAt(mapping-1)>>8;
+            } else {
+                leadCC=0;
+            }
+            ++mapping;  // skip over the firstUnit
+            buffer.append(extraData, mapping, mapping+length, true, leadCC, trailCC);
+        }
+    }
+
+    /**
+     * Finds the recomposition result for
+     * a forward-combining "lead" character,
+     * specified with a pointer to its compositions list,
+     * and a backward-combining "trail" character.
+     *
+     * <p>If the lead and trail characters combine, then this function returns
+     * the following "compositeAndFwd" value:
+     * <pre>
+     * Bits 21..1  composite character
+     * Bit      0  set if the composite is a forward-combining starter
+     * </pre>
+     * otherwise it returns -1.
+     *
+     * <p>The compositions list has (trail, compositeAndFwd) pair entries,
+     * encoded as either pairs or triples of 16-bit units.
+     * The last entry has the high bit of its first unit set.
+     *
+     * <p>The list is sorted by ascending trail characters (there are no duplicates).
+     * A linear search is used.
+     *
+     * <p>See normalizer2impl.h for a more detailed description
+     * of the compositions list format.
+     */
+    private static int combine(String compositions, int list, int trail) {
+        int key1, firstUnit;
+        if(trail<COMP_1_TRAIL_LIMIT) {
+            // trail character is 0..33FF
+            // result entry may have 2 or 3 units
+            key1=(trail<<1);
+            while(key1>(firstUnit=compositions.charAt(list))) {
+                list+=2+(firstUnit&COMP_1_TRIPLE);
+            }
+            if(key1==(firstUnit&COMP_1_TRAIL_MASK)) {
+                if((firstUnit&COMP_1_TRIPLE)!=0) {
+                    return (compositions.charAt(list+1)<<16)|compositions.charAt(list+2);
+                } else {
+                    return compositions.charAt(list+1);
+                }
+            }
+        } else {
+            // trail character is 3400..10FFFF
+            // result entry has 3 units
+            key1=COMP_1_TRAIL_LIMIT+(((trail>>COMP_1_TRAIL_SHIFT))&~COMP_1_TRIPLE);
+            int key2=(trail<<COMP_2_TRAIL_SHIFT)&0xffff;
+            int secondUnit;
+            for(;;) {
+                if(key1>(firstUnit=compositions.charAt(list))) {
+                    list+=2+(firstUnit&COMP_1_TRIPLE);
+                } else if(key1==(firstUnit&COMP_1_TRAIL_MASK)) {
+                    if(key2>(secondUnit=compositions.charAt(list+1))) {
+                        if((firstUnit&COMP_1_LAST_TUPLE)!=0) {
+                            break;
+                        } else {
+                            list+=3;
+                        }
+                    } else if(key2==(secondUnit&COMP_2_TRAIL_MASK)) {
+                        return ((secondUnit&~COMP_2_TRAIL_MASK)<<16)|compositions.charAt(list+2);
+                    } else {
+                        break;
+                    }
+                } else {
+                    break;
+                }
+            }
+        }
+        return -1;
+    }
+
+    /*
+     * Recomposes the buffer text starting at recomposeStartIndex
+     * (which is in NFD - decomposed and canonically ordered),
+     * and truncates the buffer contents.
+     *
+     * Note that recomposition never lengthens the text:
+     * Any character consists of either one or two code units;
+     * a composition may contain at most one more code unit than the original starter,
+     * while the combining mark that is removed has at least one code unit.
+     */
+    private void recompose(ReorderingBuffer buffer, int recomposeStartIndex,
+                           boolean onlyContiguous) {
+        StringBuilder sb=buffer.getStringBuilder();
+        int p=recomposeStartIndex;
+        if(p==sb.length()) {
+            return;
+        }
+
+        int starter, pRemove;
+        int compositionsList;
+        int c, compositeAndFwd;
+        int norm16;
+        int cc, prevCC;
+        boolean starterIsSupplementary;
+
+        // Some of the following variables are not used until we have a forward-combining starter
+        // and are only initialized now to avoid compiler warnings.
+        compositionsList=-1;  // used as indicator for whether we have a forward-combining starter
+        starter=-1;
+        starterIsSupplementary=false;
+        prevCC=0;
+
+        for(;;) {
+            c=sb.codePointAt(p);
+            p+=Character.charCount(c);
+            norm16=getNorm16(c);
+            cc=getCCFromYesOrMaybe(norm16);
+            if( // this character combines backward and
+                isMaybe(norm16) &&
+                // we have seen a starter that combines forward and
+                compositionsList>=0 &&
+                // the backward-combining character is not blocked
+                (prevCC<cc || prevCC==0)
+            ) {
+                if(isJamoVT(norm16)) {
+                    // c is a Jamo V/T, see if we can compose it with the previous character.
+                    if(c<Hangul.JAMO_T_BASE) {
+                        // c is a Jamo Vowel, compose with previous Jamo L and following Jamo T.
+                        char prev=(char)(sb.charAt(starter)-Hangul.JAMO_L_BASE);
+                        if(prev<Hangul.JAMO_L_COUNT) {
+                            pRemove=p-1;
+                            char syllable=(char)
+                                (Hangul.HANGUL_BASE+
+                                 (prev*Hangul.JAMO_V_COUNT+(c-Hangul.JAMO_V_BASE))*
+                                 Hangul.JAMO_T_COUNT);
+                            char t;
+                            if(p!=sb.length() && (t=(char)(sb.charAt(p)-Hangul.JAMO_T_BASE))<Hangul.JAMO_T_COUNT) {
+                                ++p;
+                                syllable+=t;  // The next character was a Jamo T.
+                            }
+                            sb.setCharAt(starter, syllable);
+                            // remove the Jamo V/T
+                            sb.delete(pRemove, p);
+                            p=pRemove;
+                        }
+                    }
+                    /*
+                     * No "else" for Jamo T:
+                     * Since the input is in NFD, there are no Hangul LV syllables that
+                     * a Jamo T could combine with.
+                     * All Jamo Ts are combined above when handling Jamo Vs.
+                     */
+                    if(p==sb.length()) {
+                        break;
+                    }
+                    compositionsList=-1;
+                    continue;
+                } else if((compositeAndFwd=combine(maybeYesCompositions, compositionsList, c))>=0) {
+                    // The starter and the combining mark (c) do combine.
+                    int composite=compositeAndFwd>>1;
+
+                    // Remove the combining mark.
+                    pRemove=p-Character.charCount(c);  // pRemove & p: start & limit of the combining mark
+                    sb.delete(pRemove, p);
+                    p=pRemove;
+                    // Replace the starter with the composite.
+                    if(starterIsSupplementary) {
+                        if(composite>0xffff) {
+                            // both are supplementary
+                            sb.setCharAt(starter, UTF16.getLeadSurrogate(composite));
+                            sb.setCharAt(starter+1, UTF16.getTrailSurrogate(composite));
+                        } else {
+                            sb.setCharAt(starter, (char)c);
+                            sb.deleteCharAt(starter+1);
+                            // The composite is shorter than the starter,
+                            // move the intermediate characters forward one.
+                            starterIsSupplementary=false;
+                            --p;
+                        }
+                    } else if(composite>0xffff) {
+                        // The composite is longer than the starter,
+                        // move the intermediate characters back one.
+                        starterIsSupplementary=true;
+                        sb.setCharAt(starter, UTF16.getLeadSurrogate(composite));
+                        sb.insert(starter+1, UTF16.getTrailSurrogate(composite));
+                        ++p;
+                    } else {
+                        // both are on the BMP
+                        sb.setCharAt(starter, (char)composite);
+                    }
+
+                    // Keep prevCC because we removed the combining mark.
+
+                    if(p==sb.length()) {
+                        break;
+                    }
+                    // Is the composite a starter that combines forward?
+                    if((compositeAndFwd&1)!=0) {
+                        compositionsList=
+                            getCompositionsListForComposite(getRawNorm16(composite));
+                    } else {
+                        compositionsList=-1;
+                    }
+
+                    // We combined; continue with looking for compositions.
+                    continue;
+                }
+            }
+
+            // no combination this time
+            prevCC=cc;
+            if(p==sb.length()) {
+                break;
+            }
+
+            // If c did not combine, then check if it is a starter.
+            if(cc==0) {
+                // Found a new starter.
+                if((compositionsList=getCompositionsListForDecompYes(norm16))>=0) {
+                    // It may combine with something, prepare for it.
+                    if(c<=0xffff) {
+                        starterIsSupplementary=false;
+                        starter=p-1;
+                    } else {
+                        starterIsSupplementary=true;
+                        starter=p-2;
+                    }
+                }
+            } else if(onlyContiguous) {
+                // FCC: no discontiguous compositions; any intervening character blocks.
+                compositionsList=-1;
+            }
+        }
+        buffer.flush();
+    }
+
+    /**
+     * Does c have a composition boundary before it?
+     * True if its decomposition begins with a character that has
+     * ccc=0 && NFC_QC=Yes (isCompYesAndZeroCC()).
+     * As a shortcut, this is true if c itself has ccc=0 && NFC_QC=Yes
+     * (isCompYesAndZeroCC()) so we need not decompose.
+     */
+    private boolean hasCompBoundaryBefore(int c, int norm16) {
+        return c<minCompNoMaybeCP || norm16HasCompBoundaryBefore(norm16);
+    }
+    private boolean norm16HasCompBoundaryBefore(int norm16) {
+        return norm16 < minNoNoCompNoMaybeCC || isAlgorithmicNoNo(norm16);
+    }
+    private boolean hasCompBoundaryBefore(CharSequence s, int src, int limit) {
+        return src == limit || hasCompBoundaryBefore(Character.codePointAt(s, src));
+    }
+    private boolean norm16HasCompBoundaryAfter(int norm16, boolean onlyContiguous) {
+        return (norm16 & HAS_COMP_BOUNDARY_AFTER) != 0 &&
+            (!onlyContiguous || isTrailCC01ForCompBoundaryAfter(norm16));
+    }
+    private boolean hasCompBoundaryAfter(CharSequence s, int start, int p, boolean onlyContiguous) {
+        return start == p || hasCompBoundaryAfter(Character.codePointBefore(s, p), onlyContiguous);
+    }
+    /** For FCC: Given norm16 HAS_COMP_BOUNDARY_AFTER, does it have tccc<=1? */
+    private boolean isTrailCC01ForCompBoundaryAfter(int norm16) {
+        return isInert(norm16) || (isDecompNoAlgorithmic(norm16) ?
+            (norm16 & DELTA_TCCC_MASK) <= DELTA_TCCC_1 : extraData.charAt(norm16 >> OFFSET_SHIFT) <= 0x1ff);
+    }
+
+    private int findPreviousCompBoundary(CharSequence s, int p, boolean onlyContiguous) {
+        while(p>0) {
+            int c=Character.codePointBefore(s, p);
+            int norm16 = getNorm16(c);
+            if (norm16HasCompBoundaryAfter(norm16, onlyContiguous)) {
+                break;
+            }
+            p-=Character.charCount(c);
+            if(hasCompBoundaryBefore(c, norm16)) {
+                break;
+            }
+        }
+        return p;
+    }
+    private int findNextCompBoundary(CharSequence s, int p, int limit, boolean onlyContiguous) {
+        while(p<limit) {
+            int c=Character.codePointAt(s, p);
+            int norm16=normTrie.get(c);
+            if(hasCompBoundaryBefore(c, norm16)) {
+                break;
+            }
+            p+=Character.charCount(c);
+            if (norm16HasCompBoundaryAfter(norm16, onlyContiguous)) {
+                break;
+            }
+        }
+        return p;
+    }
+
+
+    private int findNextFCDBoundary(CharSequence s, int p, int limit) {
+        while(p<limit) {
+            int c=Character.codePointAt(s, p);
+            int norm16;
+            if (c < minLcccCP || norm16HasDecompBoundaryBefore(norm16 = getNorm16(c))) {
+                break;
+            }
+            p+=Character.charCount(c);
+            if (norm16HasDecompBoundaryAfter(norm16)) {
+                break;
+            }
+        }
+        return p;
+    }
+
+    /**
+     * Get the canonical decomposition
+     * sherman  for ComposedCharIter
+     */
+    public static int getDecompose(int chars[], String decomps[]) {
+        Normalizer2 impl = Normalizer2.getNFDInstance();
+
+        int length=0;
+        int norm16 = 0;
+        int ch = -1;
+        int i = 0;
+
+        while (++ch < 0x2fa1e) {   //no cannoical above 0x3ffff
+            //TBD !!!! the hack code heres save us about 50ms for startup
+            //need a better solution/lookup
+            if (ch == 0x30ff)
+                ch = 0xf900;
+            else if (ch == 0x115bc)
+                ch = 0x1d15e;
+            else if (ch == 0x1d1c1)
+                ch = 0x2f800;
+
+            String s = impl.getDecomposition(ch);
+
+            if(s != null && i < chars.length) {
+                chars[i] = ch;
+                decomps[i++] = s;
+            }
+        }
+        return i;
+    }
+
+    //------------------------------------------------------
+    // special method for Collation (RBTableBuilder.build())
+    //------------------------------------------------------
+    private static boolean needSingleQuotation(char c) {
+        return (c >= 0x0009 && c <= 0x000D) ||
+               (c >= 0x0020 && c <= 0x002F) ||
+               (c >= 0x003A && c <= 0x0040) ||
+               (c >= 0x005B && c <= 0x0060) ||
+               (c >= 0x007B && c <= 0x007E);
+    }
+
+    public static String canonicalDecomposeWithSingleQuotation(String string) {
+       Normalizer2 impl = Normalizer2.getNFDInstance();
+       char[] src = string.toCharArray();
+       int    srcIndex = 0;
+       int    srcLimit = src.length;
+       char[] dest = new char[src.length * 3];  //MAX_BUF_SIZE_DECOMPOSE = 3
+       int    destIndex = 0;
+       int    destLimit = dest.length;
+
+        int prevSrc;
+        String norm;
+        int reorderStartIndex, length;
+        char c1, c2;
+        int cp;
+        int minNoMaybe = 0x00c0;
+        int cc, prevCC, trailCC;
+        char[] p;
+        int pStart;
+
+        // initialize
+        reorderStartIndex = 0;
+        prevCC = 0;
+        norm = null;
+        cp = 0;
+        pStart = 0;
+
+        cc = trailCC = -1; // initialize to bogus value
+        c1 = 0;
+        for (;;) {
+            prevSrc=srcIndex;
+            //quick check (1)less than minNoMaybe (2)no decomp (3)hangual
+            while (srcIndex != srcLimit &&
+                   ((c1 = src[srcIndex]) < minNoMaybe ||
+                    (norm = impl.getDecomposition(cp = string.codePointAt(srcIndex))) == null ||
+                    (c1 >= '\uac00' && c1 <= '\ud7a3'))) { // Hangul Syllables
+                prevCC = 0;
+                srcIndex += (cp < 0x10000) ? 1 : 2;
+            }
+
+            // copy these code units all at once
+            if (srcIndex != prevSrc) {
+                length = srcIndex - prevSrc;
+                if ((destIndex + length) <= destLimit) {
+                    System.arraycopy(src,prevSrc,dest,destIndex,length);
+                }
+
+                destIndex += length;
+                reorderStartIndex = destIndex;
+            }
+
+            // end of source reached?
+            if (srcIndex == srcLimit) {
+                break;
+            }
+
+            // cp already contains *src and norm32 is set for it, increment src
+            srcIndex += (cp < 0x10000) ? 1 : 2;
+
+            if (cp < Character.MIN_SUPPLEMENTARY_CODE_POINT) {
+                c2 = 0;
+                length = 1;
+
+                if (Character.isHighSurrogate(c1)
+                    || Character.isLowSurrogate(c1)) {
+                    norm = null;
+                }
+            } else {
+                length = 2;
+                c2 = src[srcIndex-1];
+            }
+
+          // get the decomposition and the lead and trail cc's
+          if (norm == null) {
+              // cp does not decompose
+              cc = trailCC = UCharacter.getCombiningClass(cp);
+              p = null;
+              pStart = -1;
+          } else {
+
+                pStart = 0;
+                p = norm.toCharArray();
+                length = p.length;
+                int cpNum = norm.codePointCount(0, length);
+                cc= UCharacter.getCombiningClass(norm.codePointAt(0));
+                trailCC= UCharacter.getCombiningClass(norm.codePointAt(cpNum-1));
+                if (length == 1) {
+                    // fastpath a single code unit from decomposition
+                    c1 = p[pStart];
+                    c2 = 0;
+                    p = null;
+                    pStart = -1;
+                }
+            }
+
+            if((destIndex + length * 3) >= destLimit) {  // 2 SingleQuotations
+                // buffer overflow
+                char[] tmpBuf = new char[destLimit * 2];
+                System.arraycopy(dest, 0, tmpBuf, 0, destIndex);
+                dest = tmpBuf;
+                destLimit = dest.length;
+            }
+
+            // append the decomposition to the destination buffer, assume length>0
+            {
+                int reorderSplit = destIndex;
+                if (p == null) {
+                    // fastpath: single code point
+                    if (needSingleQuotation(c1)) {
+                        //if we need single quotation, no need to consider "prevCC"
+                        //and it must NOT be a supplementary pair
+                        dest[destIndex++] = '\'';
+                        dest[destIndex++] = c1;
+                        dest[destIndex++] = '\'';
+                        trailCC = 0;
+                    } else if(cc != 0 && cc < prevCC) {
+                        // (c1, c2) is out of order with respect to the preceding
+                        //  text
+                        destIndex += length;
+                        trailCC = insertOrdered(dest, reorderStartIndex,
+                                                reorderSplit, destIndex, c1, c2, cc);
+                    } else {
+                        // just append (c1, c2)
+                        dest[destIndex++] = c1;
+                        if(c2 != 0) {
+                            dest[destIndex++] = c2;
+                        }
+                    }
+                } else {
+                    // general: multiple code points (ordered by themselves)
+                    // from decomposition
+                    if (needSingleQuotation(p[pStart])) {
+                        dest[destIndex++] = '\'';
+                        dest[destIndex++] = p[pStart++];
+                        dest[destIndex++] = '\'';
+                        length--;
+                        do {
+                            dest[destIndex++] = p[pStart++];
+                        } while(--length > 0);
+                    } else if (cc != 0 && cc < prevCC) {
+                        destIndex += length;
+                        trailCC = mergeOrdered(dest, reorderStartIndex,
+                                               reorderSplit, p, pStart,
+                                               pStart+length);
+                    } else {
+                        // just append the decomposition
+                        do {
+                            dest[destIndex++] = p[pStart++];
+                        } while (--length > 0);
+                    }
+                }
+            }
+            prevCC = trailCC;
+            if(prevCC == 0) {
+                reorderStartIndex = destIndex;
+            }
+        }
+
+        return new String(dest, 0, destIndex);
+    }
+
+    /**
+     * simpler, single-character version of mergeOrdered() -
+     * bubble-insert one single code point into the preceding string
+     * which is already canonically ordered
+     * (c, c2) may or may not yet have been inserted at src[current]..src[p]
+     *
+     * it must be p=current+lengthof(c, c2) i.e. p=current+(c2==0 ? 1 : 2)
+     *
+     * before: src[start]..src[current] is already ordered, and
+     *         src[current]..src[p]     may or may not hold (c, c2) but
+     *                          must be exactly the same length as (c, c2)
+     * after: src[start]..src[p] is ordered
+     *
+     * @return the trailing combining class
+     */
+    private static int/*unsigned byte*/ insertOrdered(char[] source,
+                                                      int start,
+                                                      int current, int p,
+                                                      char c1, char c2,
+                                                      int/*unsigned byte*/ cc) {
+        int back, preBack;
+        int r;
+        int prevCC, trailCC=cc;
+
+        if (start<current && cc!=0) {
+            // search for the insertion point where cc>=prevCC
+            preBack=back=current;
+
+            PrevArgs prevArgs = new PrevArgs();
+            prevArgs.current  = current;
+            prevArgs.start    = start;
+            prevArgs.src      = source;
+            prevArgs.c1       = c1;
+            prevArgs.c2       = c2;
+
+            // get the prevCC
+            prevCC=getPrevCC(prevArgs);
+            preBack = prevArgs.current;
+
+            if(cc<prevCC) {
+                // this will be the last code point, so keep its cc
+                trailCC=prevCC;
+                back=preBack;
+                while(start<preBack) {
+                    prevCC=getPrevCC(prevArgs);
+                    preBack=prevArgs.current;
+                    if(cc>=prevCC) {
+                        break;
+                    }
+                    back=preBack;
+                }
+
+                // this is where we are right now with all these indicies:
+                // [start]..[pPreBack] 0..? code points that we can ignore
+                // [pPreBack]..[pBack] 0..1 code points with prevCC<=cc
+                // [pBack]..[current] 0..n code points with >cc, move up to insert (c, c2)
+                // [current]..[p]         1 code point (c, c2) with cc
+
+                // move the code units in between up
+                r=p;
+                do {
+                    source[--r]=source[--current];
+                } while (back!=current);
+            }
+        }
+
+        // insert (c1, c2)
+        source[current] = c1;
+        if (c2!=0) {
+            source[(current+1)] = c2;
+        }
+
+        // we know the cc of the last code point
+        return trailCC;
+    }
+    /**
+     * merge two UTF-16 string parts together
+     * to canonically order (order by combining classes) their concatenation
+     *
+     * the two strings may already be adjacent, so that the merging is done
+     * in-place if the two strings are not adjacent, then the buffer holding the
+     * first one must be large enough
+     * the second string may or may not be ordered in itself
+     *
+     * before: [start]..[current] is already ordered, and
+     *         [next]..[limit]    may be ordered in itself, but
+     *                          is not in relation to [start..current[
+     * after: [start..current+(limit-next)[ is ordered
+     *
+     * the algorithm is a simple bubble-sort that takes the characters from
+     * src[next++] and inserts them in correct combining class order into the
+     * preceding part of the string
+     *
+     * since this function is called much less often than the single-code point
+     * insertOrdered(), it just uses that for easier maintenance
+     *
+     * @return the trailing combining class
+     */
+    private static int /*unsigned byte*/ mergeOrdered(char[] source,
+                                                      int start,
+                                                      int current,
+                                                      char[] data,
+                                                        int next,
+                                                        int limit) {
+            int r;
+            int /*unsigned byte*/ cc, trailCC=0;
+            boolean adjacent;
+
+            adjacent= current==next;
+            NextCCArgs ncArgs = new NextCCArgs();
+            ncArgs.source = data;
+            ncArgs.next   = next;
+            ncArgs.limit  = limit;
+
+            if(start!=current) {
+
+                while(ncArgs.next<ncArgs.limit) {
+                    cc=getNextCC(ncArgs);
+                    if(cc==0) {
+                        // does not bubble back
+                        trailCC=0;
+                        if(adjacent) {
+                            current=ncArgs.next;
+                        } else {
+                            data[current++]=ncArgs.c1;
+                            if(ncArgs.c2!=0) {
+                                data[current++]=ncArgs.c2;
+                            }
+                        }
+                        break;
+                    } else {
+                        r=current+(ncArgs.c2==0 ? 1 : 2);
+                        trailCC=insertOrdered(source,start, current, r,
+                                              ncArgs.c1, ncArgs.c2, cc);
+                        current=r;
+                    }
+                }
+            }
+
+            if(ncArgs.next==ncArgs.limit) {
+                // we know the cc of the last code point
+                return trailCC;
+            } else {
+                if(!adjacent) {
+                    // copy the second string part
+                    do {
+                        source[current++]=data[ncArgs.next++];
+                    } while(ncArgs.next!=ncArgs.limit);
+                    ncArgs.limit=current;
+                }
+                PrevArgs prevArgs = new PrevArgs();
+                prevArgs.src   = data;
+                prevArgs.start = start;
+                prevArgs.current =  ncArgs.limit;
+                return getPrevCC(prevArgs);
+            }
+
+    }
+    private static final class PrevArgs{
+        char[] src;
+        int start;
+        int current;
+        char c1;
+        char c2;
+    }
+
+    private static final class NextCCArgs{
+        char[] source;
+        int next;
+        int limit;
+        char c1;
+        char c2;
+    }
+    private static int /*unsigned byte*/ getNextCC(NextCCArgs args) {
+        args.c1=args.source[args.next++];
+        args.c2=0;
+
+        if (UTF16.isTrailSurrogate(args.c1)) {
+            /* unpaired second surrogate */
+            return 0;
+        } else if (!UTF16.isLeadSurrogate(args.c1)) {
+            return UCharacter.getCombiningClass(args.c1);
+        } else if (args.next!=args.limit &&
+                        UTF16.isTrailSurrogate(args.c2=args.source[args.next])){
+            ++args.next;
+            return UCharacter.getCombiningClass(Character.toCodePoint(args.c1, args.c2));
+        } else {
+            /* unpaired first surrogate */
+            args.c2=0;
+            return 0;
+        }
+    }
+    private static int /*unsigned*/ getPrevCC(PrevArgs args) {
+        args.c1=args.src[--args.current];
+        args.c2=0;
+
+        if (args.c1 < MIN_CCC_LCCC_CP) {
+            return 0;
+        } else if (UTF16.isLeadSurrogate(args.c1)) {
+            /* unpaired first surrogate */
+            return 0;
+        } else if (!UTF16.isTrailSurrogate(args.c1)) {
+            return UCharacter.getCombiningClass(args.c1);
+        } else if (args.current!=args.start &&
+                    UTF16.isLeadSurrogate(args.c2=args.src[args.current-1])) {
+            --args.current;
+            return UCharacter.getCombiningClass(Character.toCodePoint(args.c2, args.c1));
+        } else {
+            /* unpaired second surrogate */
+            args.c2=0;
+            return 0;
+        }
+    }
+
+    private int getPreviousTrailCC(CharSequence s, int start, int p) {
+        if (start == p) {
+            return 0;
+        }
+        return getFCD16(Character.codePointBefore(s, p));
+    }
+
+    private VersionInfo dataVersion;
+
+    // BMP code point thresholds for quick check loops looking at single UTF-16 code units.
+    private int minDecompNoCP;
+    private int minCompNoMaybeCP;
+    private int minLcccCP;
+
+    // Norm16 value thresholds for quick check combinations and types of extra data.
+    private int minYesNo;
+    private int minYesNoMappingsOnly;
+    private int minNoNo;
+    private int minNoNoCompBoundaryBefore;
+    private int minNoNoCompNoMaybeCC;
+    private int minNoNoEmpty;
+    private int limitNoNo;
+    private int centerNoNoDelta;
+    private int minMaybeYes;
+
+    private CodePointTrie.Fast16 normTrie;
+    private String maybeYesCompositions;
+    private String extraData;  // mappings and/or compositions for yesYes, yesNo & noNo characters
+    private byte[] smallFCD;  // [0x100] one bit per 32 BMP code points, set if any FCD!=0
+}
diff --git a/tests/test_data/std/jdk/internal/icu/impl/Punycode.class b/tests/test_data/std/jdk/internal/icu/impl/Punycode.class
new file mode 100644
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/icu/impl/Punycode.java b/tests/test_data/std/jdk/internal/icu/impl/Punycode.java
new file mode 100644
index 00000000..6fe1ebcc
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/icu/impl/Punycode.java
@@ -0,0 +1,513 @@
+/*
+ * Copyright (c) 2005, 2022, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+/*
+ *******************************************************************************
+ * Copyright (C) 2003-2004, International Business Machines Corporation and    *
+ * others. All Rights Reserved.                                                *
+ *******************************************************************************
+ */
+//
+// CHANGELOG
+//      2005-05-19 Edward Wang
+//          - copy this file from icu4jsrc_3_2/src/com/ibm/icu/text/Punycode.java
+//          - move from package com.ibm.icu.text to package sun.net.idn
+//          - use ParseException instead of StringPrepParseException
+//      2007-08-14 Martin Buchholz
+//          - remove redundant casts
+//
+package jdk.internal.icu.impl;
+
+import java.text.ParseException;
+import jdk.internal.icu.lang.UCharacter;
+import jdk.internal.icu.text.UTF16;
+
+/**
+ * Ported code from ICU punycode.c
+ * @author ram
+ */
+
+/* Package Private class */
+public final class Punycode {
+
+    /* Punycode parameters for Bootstring */
+    private static final int BASE           = 36;
+    private static final int TMIN           = 1;
+    private static final int TMAX           = 26;
+    private static final int SKEW           = 38;
+    private static final int DAMP           = 700;
+    private static final int INITIAL_BIAS   = 72;
+    private static final int INITIAL_N      = 0x80;
+
+    /* "Basic" Unicode/ASCII code points */
+    private static final int HYPHEN         = 0x2d;
+    private static final int DELIMITER      = HYPHEN;
+
+    private static final int ZERO           = 0x30;
+    private static final int NINE           = 0x39;
+
+    private static final int SMALL_A        = 0x61;
+    private static final int SMALL_Z        = 0x7a;
+
+    private static final int CAPITAL_A      = 0x41;
+    private static final int CAPITAL_Z      = 0x5a;
+
+    //  TODO: eliminate the 256 limitation
+    private static final int MAX_CP_COUNT   = 256;
+
+    private static int adaptBias(int delta, int length, boolean firstTime){
+        if(firstTime){
+            delta /=DAMP;
+        }else{
+            delta /=  2;
+        }
+        delta += delta/length;
+
+        int count=0;
+        for(; delta>((BASE-TMIN)*TMAX)/2; count+=BASE) {
+            delta/=(BASE-TMIN);
+        }
+
+        return count+(((BASE-TMIN+1)*delta)/(delta+SKEW));
+    }
+
+    /**
+     * @return the numeric value of a basic code point (for use in representing integers)
+     *         in the range 0 to BASE-1, or a negative value if cp is invalid.
+     */
+    private static final int decodeDigit(int cp) {
+        if(cp<='Z') {
+            if(cp<='9') {
+                if(cp<'0') {
+                    return -1;
+                } else {
+                    return cp-'0'+26;  // 0..9 -> 26..35
+                }
+            } else {
+                return cp-'A';  // A-Z -> 0..25
+            }
+        } else if(cp<='z') {
+            return cp-'a';  // a..z -> 0..25
+        } else {
+            return -1;
+        }
+    };
+
+    private static char asciiCaseMap(char b, boolean uppercase) {
+        if(uppercase) {
+            if(SMALL_A<=b && b<=SMALL_Z) {
+                b-=(SMALL_A-CAPITAL_A);
+            }
+        } else {
+            if(CAPITAL_A<=b && b<=CAPITAL_Z) {
+                b+=(SMALL_A-CAPITAL_A);
+            }
+        }
+        return b;
+    }
+
+    /**
+     * digitToBasic() returns the basic code point whose value
+     * (when used for representing integers) is d, which must be in the
+     * range 0 to BASE-1. The lowercase form is used unless the uppercase flag is
+     * nonzero, in which case the uppercase form is used.
+     */
+    private static char digitToBasic(int digit, boolean uppercase) {
+        /*  0..25 map to ASCII a..z or A..Z */
+        /* 26..35 map to ASCII 0..9         */
+        if(digit<26) {
+            if(uppercase) {
+                return (char)(CAPITAL_A+digit);
+            } else {
+                return (char)(SMALL_A+digit);
+            }
+        } else {
+            return (char)((ZERO-26)+digit);
+        }
+    }
+
+    // ICU-13727: Limit input length for n^2 algorithm
+    // where well-formed strings are at most 59 characters long.
+    private static final int ENCODE_MAX_CODE_UNITS = 1000;
+    private static final int DECODE_MAX_CHARS = 2000;
+
+    /**
+     * Converts Unicode to Punycode.
+     * The input string must not contain single, unpaired surrogates.
+     * The output will be represented as an array of ASCII code points.
+     *
+     * @param src
+     * @param caseFlags
+     * @return
+     * @throws ParseException
+     */
+    public static StringBuffer encode(StringBuffer src, boolean[] caseFlags) throws ParseException{
+
+        int[] cpBuffer = new int[MAX_CP_COUNT];
+        int n, delta, handledCPCount, basicLength, destLength, bias, j, m, q, k, t, srcCPCount;
+        char c, c2;
+        int srcLength = src.length();
+        if (srcLength > ENCODE_MAX_CODE_UNITS) {
+            throw new RuntimeException(
+                    "input too long: " + srcLength + " UTF-16 code units");
+        }
+        int destCapacity = MAX_CP_COUNT;
+        char[] dest = new char[destCapacity];
+        StringBuffer result = new StringBuffer();
+        /*
+         * Handle the basic code points and
+         * convert extended ones to UTF-32 in cpBuffer (caseFlag in sign bit):
+         */
+        srcCPCount=destLength=0;
+
+        for(j=0; j<srcLength; ++j) {
+            if(srcCPCount==MAX_CP_COUNT) {
+                /* too many input code points */
+                throw new ParseException("Too many input code points", -1);
+            }
+            c=src.charAt(j);
+            if(isBasic(c)) {
+                if(destLength<destCapacity) {
+                    cpBuffer[srcCPCount++]=0;
+                    dest[destLength]=
+                        caseFlags!=null ?
+                            asciiCaseMap(c, caseFlags[j]) :
+                            c;
+                }
+                ++destLength;
+            } else {
+                n=((caseFlags!=null && caseFlags[j])? 1 : 0)<<31L;
+                if(!UTF16.isSurrogate(c)) {
+                    n|=c;
+                } else if(UTF16.isLeadSurrogate(c) && (j+1)<srcLength && UTF16.isTrailSurrogate(c2=src.charAt(j+1))) {
+                    ++j;
+
+                    n|=UCharacter.getCodePoint(c, c2);
+                } else {
+                    /* error: unmatched surrogate */
+                    throw new ParseException("Illegal char found", -1);
+                }
+                cpBuffer[srcCPCount++]=n;
+            }
+        }
+
+        /* Finish the basic string - if it is not empty - with a delimiter. */
+        basicLength=destLength;
+        if(basicLength>0) {
+            if(destLength<destCapacity) {
+                dest[destLength]=DELIMITER;
+            }
+            ++destLength;
+        }
+
+        /*
+         * handledCPCount is the number of code points that have been handled
+         * basicLength is the number of basic code points
+         * destLength is the number of chars that have been output
+         */
+
+        /* Initialize the state: */
+        n=INITIAL_N;
+        delta=0;
+        bias=INITIAL_BIAS;
+
+        /* Main encoding loop: */
+        for(handledCPCount=basicLength; handledCPCount<srcCPCount; /* no op */) {
+            /*
+             * All non-basic code points < n have been handled already.
+             * Find the next larger one:
+             */
+            for(m=0x7fffffff, j=0; j<srcCPCount; ++j) {
+                q=cpBuffer[j]&0x7fffffff; /* remove case flag from the sign bit */
+                if(n<=q && q<m) {
+                    m=q;
+                }
+            }
+
+            /*
+             * Increase delta enough to advance the decoder's
+             * <n,i> state to <m,0>, but guard against overflow:
+             */
+            if(m-n>(0x7fffffff-handledCPCount-delta)/(handledCPCount+1)) {
+                throw new RuntimeException("Internal program error");
+            }
+            delta+=(m-n)*(handledCPCount+1);
+            n=m;
+
+            /* Encode a sequence of same code points n */
+            for(j=0; j<srcCPCount; ++j) {
+                q=cpBuffer[j]&0x7fffffff; /* remove case flag from the sign bit */
+                if(q<n) {
+                    ++delta;
+                } else if(q==n) {
+                    /* Represent delta as a generalized variable-length integer: */
+                    for(q=delta, k=BASE; /* no condition */; k+=BASE) {
+
+                        /** RAM: comment out the old code for conformance with draft-ietf-idn-punycode-03.txt
+
+                        t=k-bias;
+                        if(t<TMIN) {
+                            t=TMIN;
+                        } else if(t>TMAX) {
+                            t=TMAX;
+                        }
+                        */
+
+                        t=k-bias;
+                        if(t<TMIN) {
+                            t=TMIN;
+                        } else if(k>=(bias+TMAX)) {
+                            t=TMAX;
+                        }
+
+                        if(q<t) {
+                            break;
+                        }
+
+                        if(destLength<destCapacity) {
+                            dest[destLength++]=digitToBasic(t+(q-t)%(BASE-t), false);
+                        }
+                        q=(q-t)/(BASE-t);
+                    }
+
+                    if(destLength<destCapacity) {
+                        dest[destLength++]=digitToBasic(q, (cpBuffer[j]<0));
+                    }
+                    bias=adaptBias(delta, handledCPCount+1,(handledCPCount==basicLength));
+                    delta=0;
+                    ++handledCPCount;
+                }
+            }
+
+            ++delta;
+            ++n;
+        }
+
+        return result.append(dest, 0, destLength);
+    }
+
+    private static boolean isBasic(int ch){
+        return (ch < INITIAL_N);
+    }
+
+    private static boolean isBasicUpperCase(int ch){
+        return( CAPITAL_A <= ch && ch <= CAPITAL_Z);
+    }
+
+    private static boolean isSurrogate(int ch){
+        return (((ch)&0xfffff800)==0xd800);
+    }
+    /**
+     * Converts Punycode to Unicode.
+     * The Unicode string will be at most as long as the Punycode string.
+     *
+     * @param src
+     * @param caseFlags
+     * @return
+     * @throws ParseException
+     */
+    public static StringBuffer decode(StringBuffer src, boolean[] caseFlags)
+                               throws ParseException{
+        int srcLength = src.length();
+        if (srcLength > DECODE_MAX_CHARS) {
+            throw new RuntimeException("input too long: " + srcLength + " characters");
+        }
+        StringBuffer result = new StringBuffer();
+        int n, destLength, i, bias, basicLength, j, in, oldi, w, k, digit, t,
+                destCPCount, firstSupplementaryIndex, cpLength;
+        char b;
+        int destCapacity = MAX_CP_COUNT;
+        char[] dest = new char[destCapacity];
+
+        /*
+         * Handle the basic code points:
+         * Let basicLength be the number of input code points
+         * before the last delimiter, or 0 if there is none,
+         * then copy the first basicLength code points to the output.
+         *
+         * The two following loops iterate backward.
+         */
+        for(j=srcLength; j>0;) {
+            if(src.charAt(--j)==DELIMITER) {
+                break;
+            }
+        }
+        destLength=basicLength=destCPCount=j;
+
+        while(j>0) {
+            b=src.charAt(--j);
+            if(!isBasic(b)) {
+                throw new ParseException("Illegal char found", -1);
+            }
+
+            if(j<destCapacity) {
+                dest[j]= b;
+
+                if(caseFlags!=null) {
+                    caseFlags[j]=isBasicUpperCase(b);
+                }
+            }
+        }
+
+        /* Initialize the state: */
+        n=INITIAL_N;
+        i=0;
+        bias=INITIAL_BIAS;
+        firstSupplementaryIndex=1000000000;
+
+        /*
+         * Main decoding loop:
+         * Start just after the last delimiter if any
+         * basic code points were copied; start at the beginning otherwise.
+         */
+        for(in=basicLength>0 ? basicLength+1 : 0; in<srcLength; /* no op */) {
+            /*
+             * in is the index of the next character to be consumed, and
+             * destCPCount is the number of code points in the output array.
+             *
+             * Decode a generalized variable-length integer into delta,
+             * which gets added to i.  The overflow checking is easier
+             * if we increase i as we go, then subtract off its starting
+             * value at the end to obtain delta.
+             */
+            for(oldi=i, w=1, k=BASE; /* no condition */; k+=BASE) {
+                if(in>=srcLength) {
+                    throw new ParseException("Illegal char found", -1);
+                }
+
+                digit=decodeDigit(src.charAt(in++));
+                if(digit<0) {
+                    throw new ParseException("Invalid char found", -1);
+                }
+                if(digit>(0x7fffffff-i)/w) {
+                    /* integer overflow */
+                    throw new ParseException("Illegal char found", -1);
+                }
+
+                i+=digit*w;
+                t=k-bias;
+                if(t<TMIN) {
+                    t=TMIN;
+                } else if(k>=(bias+TMAX)) {
+                    t=TMAX;
+                }
+                if(digit<t) {
+                    break;
+                }
+
+                if(w>0x7fffffff/(BASE-t)) {
+                    /* integer overflow */
+                    throw new ParseException("Illegal char found", -1);
+                }
+                w*=BASE-t;
+            }
+
+            /*
+             * Modification from sample code:
+             * Increments destCPCount here,
+             * where needed instead of in for() loop tail.
+             */
+            ++destCPCount;
+            bias=adaptBias(i-oldi, destCPCount, (oldi==0));
+
+            /*
+             * i was supposed to wrap around from (incremented) destCPCount to 0,
+             * incrementing n each time, so we'll fix that now:
+             */
+            if(i/destCPCount>(0x7fffffff-n)) {
+                /* integer overflow */
+                throw new ParseException("Illegal char found", -1);
+            }
+
+            n+=i/destCPCount;
+            i%=destCPCount;
+            /* not needed for Punycode: */
+            /* if (decode_digit(n) <= BASE) return punycode_invalid_input; */
+
+            if(n>0x10ffff || isSurrogate(n)) {
+                /* Unicode code point overflow */
+                throw new ParseException("Illegal char found", -1);
+            }
+
+            /* Insert n at position i of the output: */
+            cpLength=UTF16.getCharCount(n);
+            if((destLength+cpLength)<destCapacity) {
+                int codeUnitIndex;
+
+                /*
+                 * Handle indexes when supplementary code points are present.
+                 *
+                 * In almost all cases, there will be only BMP code points before i
+                 * and even in the entire string.
+                 * This is handled with the same efficiency as with UTF-32.
+                 *
+                 * Only the rare cases with supplementary code points are handled
+                 * more slowly - but not too bad since this is an insertion anyway.
+                 */
+                if(i<=firstSupplementaryIndex) {
+                    codeUnitIndex=i;
+                    if(cpLength>1) {
+                        firstSupplementaryIndex=codeUnitIndex;
+                    } else {
+                        ++firstSupplementaryIndex;
+                    }
+                } else {
+                    codeUnitIndex=firstSupplementaryIndex;
+                    codeUnitIndex=UTF16.moveCodePointOffset(dest, 0, destLength, codeUnitIndex, i-codeUnitIndex);
+                }
+
+                /* use the UChar index codeUnitIndex instead of the code point index i */
+                if(codeUnitIndex<destLength) {
+                    System.arraycopy(dest, codeUnitIndex,
+                                     dest, codeUnitIndex+cpLength,
+                                    (destLength-codeUnitIndex));
+                    if(caseFlags!=null) {
+                        System.arraycopy(caseFlags, codeUnitIndex,
+                                         caseFlags, codeUnitIndex+cpLength,
+                                         destLength-codeUnitIndex);
+                    }
+                }
+                if(cpLength==1) {
+                    /* BMP, insert one code unit */
+                    dest[codeUnitIndex]=(char)n;
+                } else {
+                    /* supplementary character, insert two code units */
+                    dest[codeUnitIndex]=UTF16.getLeadSurrogate(n);
+                    dest[codeUnitIndex+1]=UTF16.getTrailSurrogate(n);
+                }
+                if(caseFlags!=null) {
+                    /* Case of last character determines uppercase flag: */
+                    caseFlags[codeUnitIndex]=isBasicUpperCase(src.charAt(in-1));
+                    if(cpLength==2) {
+                        caseFlags[codeUnitIndex+1]=false;
+                    }
+                }
+            }
+            destLength+=cpLength;
+            ++i;
+        }
+        result.append(dest, 0, destLength);
+        return result;
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/icu/impl/ReplaceableUCharacterIterator.class b/tests/test_data/std/jdk/internal/icu/impl/ReplaceableUCharacterIterator.class
new file mode 100644
index 0000000000000000000000000000000000000000..1c36bad39c3e6c56333ea9fad3aba3b5c6a5fb27
GIT binary patch
literal 2305
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zY5W5=CQbUG!Du2zOl%NI+K(pwCZj%gcDg%sAvK$wx%bXF=XuU^&YAh^pFf@e$l&8B
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z3Yr8)*0p<D+SIIKS~X3*sF~Atv9h6C&g@oBFFQubib9caEdueQk#6c`Q_Jbvs;MtH
zwqX^ch@w@pYZK^BWa|*s#}mn=W^|xaL01ef;e^1&hQP)~*-ZNaAC*muT?ZC8lWhp%
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z5B!b`d${yeS_B8i`uA};jDdO^^)LkR6JG~A9N3>Zq`&a1vg?vbRfE^ajN>L22u(mN
dl2(9Taen@K*^*N{RS@_aJ)(ssx3~>p=|2zN$&dg5

literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/icu/impl/ReplaceableUCharacterIterator.java b/tests/test_data/std/jdk/internal/icu/impl/ReplaceableUCharacterIterator.java
new file mode 100644
index 00000000..cf58f614
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/icu/impl/ReplaceableUCharacterIterator.java
@@ -0,0 +1,190 @@
+/*
+ * Copyright (c) 2005, 2020, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/*
+ *******************************************************************************
+ * (C) Copyright IBM Corp. 1996-2005 - All Rights Reserved                     *
+ *                                                                             *
+ * The original version of this source code and documentation is copyrighted   *
+ * and owned by IBM, These materials are provided under terms of a License     *
+ * Agreement between IBM and Sun. This technology is protected by multiple     *
+ * US and International patents. This notice and attribution to IBM may not    *
+ * to removed.                                                                 *
+ *******************************************************************************
+ */
+
+package jdk.internal.icu.impl;
+
+import jdk.internal.icu.text.Replaceable;
+import jdk.internal.icu.text.ReplaceableString;
+import jdk.internal.icu.text.UCharacterIterator;
+
+/**
+ * DLF docs must define behavior when Replaceable is mutated underneath
+ * the iterator.
+ *
+ * This and ICUCharacterIterator share some code, maybe they should share
+ * an implementation, or the common state and implementation should be
+ * moved up into UCharacterIterator.
+ *
+ * What are first, last, and getBeginIndex doing here?!?!?!
+ */
+public class ReplaceableUCharacterIterator extends UCharacterIterator {
+
+    // public constructor ------------------------------------------------------
+
+    /**
+     * Public constructor
+     * @param str text which the iterator will be based on
+     */
+    public ReplaceableUCharacterIterator(String str){
+        if(str==null){
+            throw new IllegalArgumentException();
+        }
+        this.replaceable  = new ReplaceableString(str);
+        this.currentIndex = 0;
+    }
+
+    /**
+     * Public constructor
+     * @param buf buffer of text on which the iterator will be based
+     */
+    public ReplaceableUCharacterIterator(StringBuffer buf){
+        if(buf==null){
+            throw new IllegalArgumentException();
+        }
+        this.replaceable  = new ReplaceableString(buf);
+        this.currentIndex = 0;
+    }
+
+    // public methods ----------------------------------------------------------
+
+    /**
+     * Creates a copy of this iterator, does not clone the underlying
+     * <code>Replaceable</code>object
+     * @return copy of this iterator
+     */
+    public Object clone(){
+        try {
+          return super.clone();
+        } catch (CloneNotSupportedException e) {
+            return null; // never invoked
+        }
+    }
+
+    /**
+     * Returns the current UTF16 character.
+     * @return current UTF16 character
+     */
+    public int current(){
+        if (currentIndex < replaceable.length()) {
+            return replaceable.charAt(currentIndex);
+        }
+        return DONE;
+    }
+
+    /**
+     * Returns the length of the text
+     * @return length of the text
+     */
+    public int getLength(){
+        return replaceable.length();
+    }
+
+    /**
+     * Gets the current currentIndex in text.
+     * @return current currentIndex in text.
+     */
+    public int getIndex(){
+        return currentIndex;
+    }
+
+    /**
+     * Returns next UTF16 character and increments the iterator's currentIndex by 1.
+     * If the resulting currentIndex is greater or equal to the text length, the
+     * currentIndex is reset to the text length and a value of DONECODEPOINT is
+     * returned.
+     * @return next UTF16 character in text or DONE if the new currentIndex is off the
+     *         end of the text range.
+     */
+    public int next(){
+        if (currentIndex < replaceable.length()) {
+            return replaceable.charAt(currentIndex++);
+        }
+        return DONE;
+    }
+
+
+    /**
+     * Returns previous UTF16 character and decrements the iterator's currentIndex by
+     * 1.
+     * If the resulting currentIndex is less than 0, the currentIndex is reset to 0 and a
+     * value of DONECODEPOINT is returned.
+     * @return next UTF16 character in text or DONE if the new currentIndex is off the
+     *         start of the text range.
+     */
+    public int previous(){
+        if (currentIndex > 0) {
+            return replaceable.charAt(--currentIndex);
+        }
+        return DONE;
+    }
+
+    /**
+     * Sets the currentIndex to the specified currentIndex in the text and returns that
+     * single UTF16 character at currentIndex.
+     * This assumes the text is stored as 16-bit code units.
+     * @param currentIndex the currentIndex within the text.
+     * @exception IllegalArgumentException is thrown if an invalid currentIndex is
+     *            supplied. i.e. currentIndex is out of bounds.
+     */
+    public void setIndex(int currentIndex) {
+        if (currentIndex < 0 || currentIndex > replaceable.length()) {
+            throw new IllegalArgumentException();
+        }
+        this.currentIndex = currentIndex;
+    }
+
+    public int getText(char[] fillIn, int offset){
+        int length = replaceable.length();
+        if(offset < 0 || offset + length > fillIn.length){
+            throw new IndexOutOfBoundsException(Integer.toString(length));
+        }
+        replaceable.getChars(0,length,fillIn,offset);
+        return length;
+    }
+
+    // private data members ----------------------------------------------------
+
+    /**
+     * Replaceable object
+     */
+    private Replaceable replaceable;
+    /**
+     * Current currentIndex
+     */
+    private int currentIndex;
+
+}
diff --git a/tests/test_data/std/jdk/internal/icu/impl/StringPrepDataReader.class b/tests/test_data/std/jdk/internal/icu/impl/StringPrepDataReader.class
new file mode 100644
index 0000000000000000000000000000000000000000..b99ed459f3cbe8524934c4d84a6c081c7ef0922b
GIT binary patch
literal 1886
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/icu/impl/StringPrepDataReader.java b/tests/test_data/std/jdk/internal/icu/impl/StringPrepDataReader.java
new file mode 100644
index 00000000..e21799c8
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/icu/impl/StringPrepDataReader.java
@@ -0,0 +1,128 @@
+/*
+ * Copyright (c) 2005, 2020, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+/*
+/*
+ ******************************************************************************
+ * Copyright (C) 2003, International Business Machines Corporation and   *
+ * others. All Rights Reserved.                                               *
+ ******************************************************************************
+ *
+ * Created on May 2, 2003
+ *
+ * To change the template for this generated file go to
+ * Window>Preferences>Java>Code Generation>Code and Comments
+ */
+// CHANGELOG
+//      2005-05-19 Edward Wang
+//          - copy this file from icu4jsrc_3_2/src/com/ibm/icu/impl/StringPrepDataReader.java
+//          - move from package com.ibm.icu.impl to package sun.net.idn
+//
+package jdk.internal.icu.impl;
+
+import java.io.DataInputStream;
+import java.io.IOException;
+import java.io.InputStream;
+
+import jdk.internal.icu.impl.ICUBinary;
+
+
+/**
+ * @author ram
+ *
+ * To change the template for this generated type comment go to
+ * Window>Preferences>Java>Code Generation>Code and Comments
+ */
+public final class StringPrepDataReader implements ICUBinary.Authenticate {
+
+   /**
+    * <p>private constructor.</p>
+    * @param inputStream ICU uprop.dat file input stream
+    * @exception IOException throw if data file fails authentication
+    * @draft 2.1
+    */
+    public StringPrepDataReader(InputStream inputStream)
+                                        throws IOException{
+
+        unicodeVersion = ICUBinary.readHeader(inputStream, DATA_FORMAT_ID, this);
+
+
+        dataInputStream = new DataInputStream(inputStream);
+
+    }
+
+    public void read(byte[] idnaBytes,
+                        char[] mappingTable)
+                        throws IOException{
+
+        // Read the bytes that make up the idnaTrie
+        dataInputStream.read(idnaBytes);
+
+        // Read the extra data
+        for(int i=0;i<mappingTable.length;i++){
+            mappingTable[i]=dataInputStream.readChar();
+        }
+    }
+
+    public byte[] getDataFormatVersion(){
+        return DATA_FORMAT_VERSION;
+    }
+
+    public boolean isDataVersionAcceptable(byte version[]){
+        return version[0] == DATA_FORMAT_VERSION[0]
+               && version[2] == DATA_FORMAT_VERSION[2]
+               && version[3] == DATA_FORMAT_VERSION[3];
+    }
+    public int[] readIndexes(int length) throws IOException{
+        int[] indexes = new int[length];
+        // Read the indexes
+        for (int i = 0; i <length ; i++) {
+             indexes[i] = dataInputStream.readInt();
+        }
+        return indexes;
+    }
+
+    public byte[] getUnicodeVersion(){
+        return unicodeVersion;
+    }
+    // private data members -------------------------------------------------
+
+
+    /**
+     * ICU data file input stream
+     */
+    private DataInputStream dataInputStream;
+    private byte[] unicodeVersion;
+    /**
+     * File format version that this class understands.
+     * No guarantees are made if a older version is used
+     * see store.c of gennorm for more information and values
+     */
+    // /* dataFormat="SPRP" 0x53, 0x50, 0x52, 0x50  */
+    private static final byte DATA_FORMAT_ID[] = {(byte)0x53, (byte)0x50,
+                                                    (byte)0x52, (byte)0x50};
+    private static final byte DATA_FORMAT_VERSION[] = {(byte)0x3, (byte)0x2,
+                                                        (byte)0x5, (byte)0x2};
+
+}
diff --git a/tests/test_data/std/jdk/internal/icu/impl/Trie$DataManipulate.class b/tests/test_data/std/jdk/internal/icu/impl/Trie$DataManipulate.class
new file mode 100644
index 0000000000000000000000000000000000000000..1e91f31168c5b47f73d049b5ad660e8ae8ad80b2
GIT binary patch
literal 259
zcmZ{fJ#NB45QX3HV`GP))Tt?OlRX3o;Ub|(E-*2Jwa&7(yz3l}A_vH!PzE}RH1kGJ
z^Pax>y_|mltg%QjA{5Qx%UB<!_w0<V24hd1GatQ`<%T1_vbWvfI7*5M;i=(oHjaI5
z_MeSZQLS3ywsi;V>;3T<M6JoHEJ{ND-VS{wTkC|7T`OO%al-6PLfo|>rg$Jc|BpbJ
tm)=Xib{v8P!s4DOArQv;4nRsbMWWjnsm>8*$ZncruA1wmBH=N~{s04uKxhB}

literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/icu/impl/Trie$DefaultGetFoldingOffset.class b/tests/test_data/std/jdk/internal/icu/impl/Trie$DefaultGetFoldingOffset.class
new file mode 100644
index 0000000000000000000000000000000000000000..3c45eb98e8866265700ed9d9c68692fba829f34e
GIT binary patch
literal 617
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DevpgY

literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/icu/impl/Trie.class b/tests/test_data/std/jdk/internal/icu/impl/Trie.class
new file mode 100644
index 0000000000000000000000000000000000000000..4820539c30fe0858f12452d044ecc284b96662de
GIT binary patch
literal 3338
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/icu/impl/Trie.java b/tests/test_data/std/jdk/internal/icu/impl/Trie.java
new file mode 100644
index 00000000..c8a4de53
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/icu/impl/Trie.java
@@ -0,0 +1,367 @@
+/*
+ * Copyright (c) 2005, 2020, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/*
+ ******************************************************************************
+ * Copyright (C) 1996-2014, International Business Machines Corporation and
+ * others. All Rights Reserved.
+ ******************************************************************************
+ */
+
+package jdk.internal.icu.impl;
+
+import jdk.internal.icu.lang.UCharacter;
+import jdk.internal.icu.text.UTF16;
+
+import java.io.DataInputStream;
+import java.io.InputStream;
+import java.io.IOException;
+
+/**
+ * <p>A trie is a kind of compressed, serializable table of values
+ * associated with Unicode code points (0..0x10ffff).</p>
+ * <p>This class defines the basic structure of a trie and provides methods
+ * to <b>retrieve the offsets to the actual data</b>.</p>
+ * <p>Data will be the form of an array of basic types, char or int.</p>
+ * <p>The actual data format will have to be specified by the user in the
+ * inner static interface com.ibm.icu.impl.Trie.DataManipulate.</p>
+ * <p>This trie implementation is optimized for getting offset while walking
+ * forward through a UTF-16 string.
+ * Therefore, the simplest and fastest access macros are the
+ * fromLead() and fromOffsetTrail() methods.
+ * The fromBMP() method are a little more complicated; they get offsets even
+ * for lead surrogate codepoints, while the fromLead() method get special
+ * "folded" offsets for lead surrogate code units if there is relevant data
+ * associated with them.
+ * From such a folded offsets, an offset needs to be extracted to supply
+ * to the fromOffsetTrail() methods.
+ * To handle such supplementary codepoints, some offset information are kept
+ * in the data.</p>
+ * <p>Methods in com.ibm.icu.impl.Trie.DataManipulate are called to retrieve
+ * that offset from the folded value for the lead surrogate unit.</p>
+ * <p>For examples of use, see com.ibm.icu.impl.CharTrie or
+ * com.ibm.icu.impl.IntTrie.</p>
+ * @author synwee
+ * @see com.ibm.icu.impl.CharTrie
+ * @see com.ibm.icu.impl.IntTrie
+ * @since release 2.1, Jan 01 2002
+ */
+public abstract class Trie
+{
+    // public class declaration ----------------------------------------
+
+    /**
+     * Character data in com.ibm.impl.Trie have different user-specified format
+     * for different purposes.
+     * This interface specifies methods to be implemented in order for
+     * com.ibm.impl.Trie, to surrogate offset information encapsulated within
+     * the data.
+     */
+    public static interface DataManipulate
+    {
+        /**
+         * Called by com.ibm.icu.impl.Trie to extract from a lead surrogate's
+         * data
+         * the index array offset of the indexes for that lead surrogate.
+         * @param value data value for a surrogate from the trie, including the
+         *        folding offset
+         * @return data offset or 0 if there is no data for the lead surrogate
+         */
+        public int getFoldingOffset(int value);
+    }
+
+    // default implementation
+    private static class DefaultGetFoldingOffset implements DataManipulate {
+        public int getFoldingOffset(int value) {
+            return value;
+        }
+    }
+
+    // protected constructor -------------------------------------------
+
+    /**
+     * Trie constructor for CharTrie use.
+     * @param inputStream ICU data file input stream which contains the
+     *                        trie
+     * @param dataManipulate object containing the information to parse the
+     *                       trie data
+     * @throws IOException thrown when input stream does not have the
+     *                        right header.
+     */
+    protected Trie(InputStream inputStream,
+                   DataManipulate  dataManipulate) throws IOException
+    {
+        DataInputStream input = new DataInputStream(inputStream);
+        // Magic number to authenticate the data.
+        int signature = input.readInt();
+        m_options_    = input.readInt();
+
+        if (!checkHeader(signature)) {
+            throw new IllegalArgumentException("ICU data file error: Trie header authentication failed, please check if you have the most updated ICU data file");
+        }
+
+        if(dataManipulate != null) {
+            m_dataManipulate_ = dataManipulate;
+        } else {
+            m_dataManipulate_ = new DefaultGetFoldingOffset();
+        }
+        m_isLatin1Linear_ = (m_options_ &
+                             HEADER_OPTIONS_LATIN1_IS_LINEAR_MASK_) != 0;
+        m_dataOffset_     = input.readInt();
+        m_dataLength_     = input.readInt();
+        unserialize(inputStream);
+    }
+
+    // protected data members ------------------------------------------
+
+    /**
+     * Lead surrogate code points' index displacement in the index array.
+     * <pre>{@code
+     * 0x10000-0xd800=0x2800
+     * 0x2800 >> INDEX_STAGE_1_SHIFT_
+     * }</pre>
+     */
+    protected static final int LEAD_INDEX_OFFSET_ = 0x2800 >> 5;
+    /**
+     * Shift size for shifting right the input index. 1..9
+     */
+    protected static final int INDEX_STAGE_1_SHIFT_ = 5;
+    /**
+     * Shift size for shifting left the index array values.
+     * Increases possible data size with 16-bit index values at the cost
+     * of compactability.
+     * This requires blocks of stage 2 data to be aligned by
+     * DATA_GRANULARITY.
+     * 0..INDEX_STAGE_1_SHIFT
+     */
+    protected static final int INDEX_STAGE_2_SHIFT_ = 2;
+    /**
+     * Number of data values in a stage 2 (data array) block.
+     */
+    protected static final int DATA_BLOCK_LENGTH=1<<INDEX_STAGE_1_SHIFT_;
+    /**
+     * Mask for getting the lower bits from the input index.
+     * DATA_BLOCK_LENGTH - 1.
+     */
+    protected static final int INDEX_STAGE_3_MASK_ = DATA_BLOCK_LENGTH - 1;
+    /**
+     * Surrogate mask to use when shifting offset to retrieve supplementary
+     * values
+     */
+    protected static final int SURROGATE_MASK_ = 0x3FF;
+    /**
+     * Index or UTF16 characters
+     */
+    protected char m_index_[];
+    /**
+     * Internal TrieValue which handles the parsing of the data value.
+     * This class is to be implemented by the user
+     */
+    protected DataManipulate m_dataManipulate_;
+    /**
+     * Start index of the data portion of the trie. CharTrie combines
+     * index and data into a char array, so this is used to indicate the
+     * initial offset to the data portion.
+     * Note this index always points to the initial value.
+     */
+    protected int m_dataOffset_;
+    /**
+     * Length of the data array
+     */
+    protected int m_dataLength_;
+
+    // protected methods -----------------------------------------------
+
+    /**
+     * Gets the offset to the data which the surrogate pair points to.
+     * @param lead lead surrogate
+     * @param trail trailing surrogate
+     * @return offset to data
+     */
+    protected abstract int getSurrogateOffset(char lead, char trail);
+
+    /**
+     * Gets the offset to the data which the index ch after variable offset
+     * points to.
+     * Note for locating a non-supplementary character data offset, calling
+     * <p>
+     * getRawOffset(0, ch);
+     * </p>
+     * will do. Otherwise if it is a supplementary character formed by
+     * surrogates lead and trail. Then we would have to call getRawOffset()
+     * with getFoldingIndexOffset(). See getSurrogateOffset().
+     * @param offset index offset which ch is to start from
+     * @param ch index to be used after offset
+     * @return offset to the data
+     */
+    protected final int getRawOffset(int offset, char ch)
+    {
+        return (m_index_[offset + (ch >> INDEX_STAGE_1_SHIFT_)]
+                << INDEX_STAGE_2_SHIFT_)
+                + (ch & INDEX_STAGE_3_MASK_);
+    }
+
+    /**
+     * Gets the offset to data which the BMP character points to
+     * Treats a lead surrogate as a normal code point.
+     * @param ch BMP character
+     * @return offset to data
+     */
+    protected final int getBMPOffset(char ch)
+    {
+        return (ch >= UTF16.LEAD_SURROGATE_MIN_VALUE
+                && ch <= UTF16.LEAD_SURROGATE_MAX_VALUE)
+                ? getRawOffset(LEAD_INDEX_OFFSET_, ch)
+                : getRawOffset(0, ch);
+                // using a getRawOffset(ch) makes no diff
+    }
+
+    /**
+     * Gets the offset to the data which this lead surrogate character points
+     * to.
+     * Data at the returned offset may contain folding offset information for
+     * the next trailing surrogate character.
+     * @param ch lead surrogate character
+     * @return offset to data
+     */
+    protected final int getLeadOffset(char ch)
+    {
+       return getRawOffset(0, ch);
+    }
+
+    /**
+     * Internal trie getter from a code point.
+     * Could be faster(?) but longer with
+     * {@code if((c32)<=0xd7ff) { (result)=_TRIE_GET_RAW(trie, data, 0, c32); }}
+     * Gets the offset to data which the codepoint points to
+     * @param ch codepoint
+     * @return offset to data
+     */
+    protected final int getCodePointOffset(int ch)
+    {
+        // if ((ch >> 16) == 0) slower
+        if (ch < 0) {
+            return -1;
+        } else if (ch < UTF16.LEAD_SURROGATE_MIN_VALUE) {
+            // fastpath for the part of the BMP below surrogates (D800) where getRawOffset() works
+            return getRawOffset(0, (char)ch);
+        } else if (ch < UTF16.SUPPLEMENTARY_MIN_VALUE) {
+            // BMP codepoint
+            return getBMPOffset((char)ch);
+        } else if (ch <= UCharacter.MAX_VALUE) {
+            // look at the construction of supplementary characters
+            // trail forms the ends of it.
+            return getSurrogateOffset(UTF16.getLeadSurrogate(ch),
+                                      (char)(ch & SURROGATE_MASK_));
+        } else {
+            // return -1 if there is an error, in this case we return
+            return -1;
+        }
+    }
+
+    /**
+     * <p>Parses the inputstream and creates the trie index with it.</p>
+     * <p>This is overwritten by the child classes.
+     * @param inputStream input stream containing the trie information
+     * @exception IOException thrown when data reading fails.
+     */
+    protected void unserialize(InputStream inputStream) throws IOException
+    {
+        //indexLength is a multiple of 1024 >> INDEX_STAGE_2_SHIFT_
+        m_index_              = new char[m_dataOffset_];
+        DataInputStream input = new DataInputStream(inputStream);
+        for (int i = 0; i < m_dataOffset_; i ++) {
+             m_index_[i] = input.readChar();
+        }
+    }
+
+    /**
+     * Determines if this is a 16 bit trie
+     * @return true if this is a 16 bit trie
+     */
+    protected final boolean isCharTrie()
+    {
+        return (m_options_ & HEADER_OPTIONS_DATA_IS_32_BIT_) == 0;
+    }
+
+    // private data members --------------------------------------------
+
+    /**
+     * Latin 1 option mask
+     */
+    protected static final int HEADER_OPTIONS_LATIN1_IS_LINEAR_MASK_ = 0x200;
+    /**
+     * Constant number to authenticate the byte block
+     */
+    protected static final int HEADER_SIGNATURE_ = 0x54726965;
+    /**
+     * Header option formatting
+     */
+    private static final int HEADER_OPTIONS_SHIFT_MASK_ = 0xF;
+    protected static final int HEADER_OPTIONS_INDEX_SHIFT_ = 4;
+    protected static final int HEADER_OPTIONS_DATA_IS_32_BIT_ = 0x100;
+
+    /**
+     * Flag indicator for Latin quick access data block
+     */
+    private boolean m_isLatin1Linear_;
+
+    /**
+     * <p>Trie options field.</p>
+     * <p>options bit field:<br>
+     * 9  1 = Latin-1 data is stored linearly at data + DATA_BLOCK_LENGTH<br>
+     * 8  0 = 16-bit data, 1=32-bit data<br>
+     * 7..4  INDEX_STAGE_1_SHIFT   // 0..INDEX_STAGE_2_SHIFT<br>
+     * 3..0  INDEX_STAGE_2_SHIFT   // 1..9<br>
+     */
+    private int m_options_;
+
+    // private methods ---------------------------------------------------
+
+    /**
+     * Authenticates raw data header.
+     * Checking the header information, signature and options.
+     * @param signature This contains the options and type of a Trie
+     * @return true if the header is authenticated valid
+     */
+    private final boolean checkHeader(int signature)
+    {
+        // check the signature
+        // Trie in big-endian US-ASCII (0x54726965).
+        // Magic number to authenticate the data.
+        if (signature != HEADER_SIGNATURE_) {
+            return false;
+        }
+
+        if ((m_options_ & HEADER_OPTIONS_SHIFT_MASK_) !=
+                                                    INDEX_STAGE_1_SHIFT_ ||
+            ((m_options_ >> HEADER_OPTIONS_INDEX_SHIFT_) &
+                                                HEADER_OPTIONS_SHIFT_MASK_)
+                                                 != INDEX_STAGE_2_SHIFT_) {
+            return false;
+        }
+        return true;
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/icu/impl/Trie2$1.class b/tests/test_data/std/jdk/internal/icu/impl/Trie2$1.class
new file mode 100644
index 0000000000000000000000000000000000000000..4009d3c340c0cb25ed2badb661dd2d96d5c8d3c1
GIT binary patch
literal 558
zcmaJ;yG{Z@6g?MKmY1TaAfnO2M6hs!g^k9BXe0qFB=o~Ffx%^#?8C3Ju`;pn1N<oC
zodpvsCYgKg<J`yG`TqI*0?@`$9x0@4SVe3gL)e~)SK)X<Pn@UGOu7*vbE~w9?g;5d
zb7&(=IG&AP9Hk=}XyG}^jU6>#c+MbD^6IQ*BTqPAM;Qt)mOZgp$bewA{jnsJx=PD_
zJRiwmAVwa0%3a?T-cSU}*ej<MO;t!Z>8`8ay5V8xV!_25oo0uSQkp=l<e&XGaOHzC
z4f4srm*&OX|6aSEA1XcR$!O}2Z5$BlYq}7!eHliNe#kp2cC?m3+Y@0ZdA!2E7vdB)
z@0gI|g{S!Pp4lp}<}i}+Tzr7ulW>ux34?0bWWBf~U<)O-_<yj&(j;FqnsTZ7n~}`?
s%d97vm1T65X&7bfa*l<)gujmpqlGHVTH>kVkg?26o6(#cN9&o~FCHCkbN~PV

literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/icu/impl/Trie2$Range.class b/tests/test_data/std/jdk/internal/icu/impl/Trie2$Range.class
new file mode 100644
index 0000000000000000000000000000000000000000..3ca56ef32b7e4f646eb53c400271132196ba1c90
GIT binary patch
literal 1128
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/icu/impl/Trie2$Trie2Iterator.class b/tests/test_data/std/jdk/internal/icu/impl/Trie2$Trie2Iterator.class
new file mode 100644
index 0000000000000000000000000000000000000000..d9b5cd33709f55cd7bf8aebbadd88693283f43c4
GIT binary patch
literal 2584
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/icu/impl/Trie2$UTrie2Header.class b/tests/test_data/std/jdk/internal/icu/impl/Trie2$UTrie2Header.class
new file mode 100644
index 0000000000000000000000000000000000000000..74457b19bb3784ac68a31244ebda3e944c74649a
GIT binary patch
literal 579
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/icu/impl/Trie2$ValueMapper.class b/tests/test_data/std/jdk/internal/icu/impl/Trie2$ValueMapper.class
new file mode 100644
index 0000000000000000000000000000000000000000..e175a6be898fccfe76751328c2172cd0ea5bca3f
GIT binary patch
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/icu/impl/Trie2.class b/tests/test_data/std/jdk/internal/icu/impl/Trie2.class
new file mode 100644
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GIT binary patch
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/icu/impl/Trie2.java b/tests/test_data/std/jdk/internal/icu/impl/Trie2.java
new file mode 100644
index 00000000..dc066fe2
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/icu/impl/Trie2.java
@@ -0,0 +1,655 @@
+/*
+ * Copyright (c) 2015, 2020, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/*
+ *******************************************************************************
+ * Copyright (C) 2009-2014, International Business Machines Corporation and
+ * others. All Rights Reserved.
+ *******************************************************************************
+ */
+
+package jdk.internal.icu.impl;
+
+import java.io.IOException;
+import java.nio.ByteBuffer;
+import java.nio.ByteOrder;
+import java.util.Iterator;
+import java.util.NoSuchElementException;
+
+
+/**
+ * This is the interface and common implementation of a Unicode Trie2.
+ * It is a kind of compressed table that maps from Unicode code points (0..0x10ffff)
+ * to 16- or 32-bit integer values.  It works best when there are ranges of
+ * characters with the same value, which is generally the case with Unicode
+ * character properties.
+ *
+ * This is the second common version of a Unicode trie (hence the name Trie2).
+ *
+ */
+abstract class Trie2 implements Iterable<Trie2.Range> {
+
+    /**
+     * Create a Trie2 from its serialized form.  Inverse of utrie2_serialize().
+     *
+     * Reads from the current position and leaves the buffer after the end of the trie.
+     *
+     * The serialized format is identical between ICU4C and ICU4J, so this function
+     * will work with serialized Trie2s from either.
+     *
+     * The actual type of the returned Trie2 will be either Trie2_16 or Trie2_32, depending
+     * on the width of the data.
+     *
+     * To obtain the width of the Trie2, check the actual class type of the returned Trie2.
+     * Or use the createFromSerialized() function of Trie2_16 or Trie2_32, which will
+     * return only Tries of their specific type/size.
+     *
+     * The serialized Trie2 on the stream may be in either little or big endian byte order.
+     * This allows using serialized Tries from ICU4C without needing to consider the
+     * byte order of the system that created them.
+     *
+     * @param bytes a byte buffer to the serialized form of a UTrie2.
+     * @return An unserialized Trie2, ready for use.
+     * @throws IllegalArgumentException if the stream does not contain a serialized Trie2.
+     * @throws IOException if a read error occurs in the buffer.
+     *
+     */
+    public static Trie2 createFromSerialized(ByteBuffer bytes) throws IOException {
+         //    From ICU4C utrie2_impl.h
+         //    * Trie2 data structure in serialized form:
+         //     *
+         //     * UTrie2Header header;
+         //     * uint16_t index[header.index2Length];
+         //     * uint16_t data[header.shiftedDataLength<<2];  -- or uint32_t data[...]
+         //     * @internal
+         //     */
+         //    typedef struct UTrie2Header {
+         //        /** "Tri2" in big-endian US-ASCII (0x54726932) */
+         //        uint32_t signature;
+
+         //       /**
+         //         * options bit field:
+         //         * 15.. 4   reserved (0)
+         //         *  3.. 0   UTrie2ValueBits valueBits
+         //         */
+         //        uint16_t options;
+         //
+         //        /** UTRIE2_INDEX_1_OFFSET..UTRIE2_MAX_INDEX_LENGTH */
+         //        uint16_t indexLength;
+         //
+         //        /** (UTRIE2_DATA_START_OFFSET..UTRIE2_MAX_DATA_LENGTH)>>UTRIE2_INDEX_SHIFT */
+         //        uint16_t shiftedDataLength;
+         //
+         //        /** Null index and data blocks, not shifted. */
+         //        uint16_t index2NullOffset, dataNullOffset;
+         //
+         //        /**
+         //         * First code point of the single-value range ending with U+10ffff,
+         //         * rounded up and then shifted right by UTRIE2_SHIFT_1.
+         //         */
+         //        uint16_t shiftedHighStart;
+         //    } UTrie2Header;
+
+        ByteOrder outerByteOrder = bytes.order();
+        try {
+            UTrie2Header header = new UTrie2Header();
+
+            /* check the signature */
+            header.signature = bytes.getInt();
+            switch (header.signature) {
+            case 0x54726932:
+                // The buffer is already set to the trie data byte order.
+                break;
+            case 0x32697254:
+                // Temporarily reverse the byte order.
+                boolean isBigEndian = outerByteOrder == ByteOrder.BIG_ENDIAN;
+                bytes.order(isBigEndian ? ByteOrder.LITTLE_ENDIAN : ByteOrder.BIG_ENDIAN);
+                header.signature = 0x54726932;
+                break;
+            default:
+                throw new IllegalArgumentException("Buffer does not contain a serialized UTrie2");
+            }
+
+            header.options = bytes.getChar();
+            header.indexLength = bytes.getChar();
+            header.shiftedDataLength = bytes.getChar();
+            header.index2NullOffset = bytes.getChar();
+            header.dataNullOffset   = bytes.getChar();
+            header.shiftedHighStart = bytes.getChar();
+
+            if ((header.options & UTRIE2_OPTIONS_VALUE_BITS_MASK) != 0) {
+                throw new IllegalArgumentException("UTrie2 serialized format error.");
+            }
+
+            Trie2 This;
+            This = new Trie2_16();
+            This.header = header;
+
+            /* get the length values and offsets */
+            This.indexLength      = header.indexLength;
+            This.dataLength       = header.shiftedDataLength << UTRIE2_INDEX_SHIFT;
+            This.index2NullOffset = header.index2NullOffset;
+            This.dataNullOffset   = header.dataNullOffset;
+            This.highStart        = header.shiftedHighStart << UTRIE2_SHIFT_1;
+            This.highValueIndex   = This.dataLength - UTRIE2_DATA_GRANULARITY;
+            This.highValueIndex += This.indexLength;
+
+            // Allocate the Trie2 index array. If the data width is 16 bits, the array also
+            // includes the space for the data.
+
+            int indexArraySize = This.indexLength;
+            indexArraySize += This.dataLength;
+            This.index = new char[indexArraySize];
+
+            /* Read in the index */
+            int i;
+            for (i=0; i<This.indexLength; i++) {
+                This.index[i] = bytes.getChar();
+            }
+
+            /* Read in the data. 16 bit data goes in the same array as the index.
+             * 32 bit data goes in its own separate data array.
+             */
+            This.data16 = This.indexLength;
+            for (i=0; i<This.dataLength; i++) {
+                This.index[This.data16 + i] = bytes.getChar();
+            }
+
+            This.data32 = null;
+            This.initialValue = This.index[This.dataNullOffset];
+            This.errorValue   = This.index[This.data16+UTRIE2_BAD_UTF8_DATA_OFFSET];
+
+            return This;
+        } finally {
+            bytes.order(outerByteOrder);
+        }
+    }
+
+    /**
+     * Get the value for a code point as stored in the Trie2.
+     *
+     * @param codePoint the code point
+     * @return the value
+     */
+    public abstract int get(int codePoint);
+
+    /**
+     * Get the trie value for a UTF-16 code unit.
+     *
+     * A Trie2 stores two distinct values for input in the lead surrogate
+     * range, one for lead surrogates, which is the value that will be
+     * returned by this function, and a second value that is returned
+     * by Trie2.get().
+     *
+     * For code units outside of the lead surrogate range, this function
+     * returns the same result as Trie2.get().
+     *
+     * This function, together with the alternate value for lead surrogates,
+     * makes possible very efficient processing of UTF-16 strings without
+     * first converting surrogate pairs to their corresponding 32 bit code point
+     * values.
+     *
+     * At build-time, enumerate the contents of the Trie2 to see if there
+     * is non-trivial (non-initialValue) data for any of the supplementary
+     * code points associated with a lead surrogate.
+     * If so, then set a special (application-specific) value for the
+     * lead surrogate code _unit_, with Trie2Writable.setForLeadSurrogateCodeUnit().
+     *
+     * At runtime, use Trie2.getFromU16SingleLead(). If there is non-trivial
+     * data and the code unit is a lead surrogate, then check if a trail surrogate
+     * follows. If so, assemble the supplementary code point and look up its value
+     * with Trie2.get(); otherwise reset the lead
+     * surrogate's value or do a code point lookup for it.
+     *
+     * If there is only trivial data for lead and trail surrogates, then processing
+     * can often skip them. For example, in normalization or case mapping
+     * all characters that do not have any mappings are simply copied as is.
+     *
+     * @param c the code point or lead surrogate value.
+     * @return the value
+     */
+    public abstract int getFromU16SingleLead(char c);
+
+    /**
+     * When iterating over the contents of a Trie2, Elements of this type are produced.
+     * The iterator will return one item for each contiguous range of codepoints  having the same value.
+     *
+     * When iterating, the same Trie2EnumRange object will be reused and returned for each range.
+     * If you need to retain complete iteration results, clone each returned Trie2EnumRange,
+     * or save the range in some other way, before advancing to the next iteration step.
+     */
+    public static class Range {
+        public int     startCodePoint;
+        public int     endCodePoint;     // Inclusive.
+        public int     value;
+        public boolean leadSurrogate;
+
+        public boolean equals(Object other) {
+            if (other == null || !(other.getClass().equals(getClass()))) {
+                return false;
+            }
+            Range tother = (Range)other;
+            return this.startCodePoint == tother.startCodePoint &&
+                   this.endCodePoint   == tother.endCodePoint   &&
+                   this.value          == tother.value          &&
+                   this.leadSurrogate  == tother.leadSurrogate;
+        }
+
+        public int hashCode() {
+            int h = initHash();
+            h = hashUChar32(h, startCodePoint);
+            h = hashUChar32(h, endCodePoint);
+            h = hashInt(h, value);
+            h = hashByte(h, leadSurrogate? 1: 0);
+            return h;
+        }
+    }
+
+    /**
+     *  Create an iterator over the value ranges in this Trie2.
+     *  Values from the Trie2 are not remapped or filtered, but are returned as they
+     *  are stored in the Trie2.
+     *
+     * @return an Iterator
+     */
+    public Iterator<Range> iterator() {
+        return iterator(defaultValueMapper);
+    }
+
+    private static ValueMapper defaultValueMapper = new ValueMapper() {
+        public int map(int in) {
+            return in;
+        }
+    };
+
+    /**
+     * Create an iterator over the value ranges from this Trie2.
+     * Values from the Trie2 are passed through a caller-supplied remapping function,
+     * and it is the remapped values that determine the ranges that
+     * will be produced by the iterator.
+     *
+     *
+     * @param mapper provides a function to remap values obtained from the Trie2.
+     * @return an Iterator
+     */
+    public Iterator<Range> iterator(ValueMapper mapper) {
+        return new Trie2Iterator(mapper);
+    }
+
+    /**
+     * When iterating over the contents of a Trie2, an instance of TrieValueMapper may
+     * be used to remap the values from the Trie2.  The remapped values will be used
+     * both in determining the ranges of codepoints and as the value to be returned
+     * for each range.
+     *
+     * Example of use, with an anonymous subclass of TrieValueMapper:
+     *
+     *
+     * ValueMapper m = new ValueMapper() {
+     *    int map(int in) {return in & 0x1f;};
+     * }
+     * for (Iterator<Trie2EnumRange> iter = trie.iterator(m); i.hasNext(); ) {
+     *     Trie2EnumRange r = i.next();
+     *     ...  // Do something with the range r.
+     * }
+     *
+     */
+    public interface ValueMapper {
+        public int  map(int originalVal);
+    }
+
+    //--------------------------------------------------------------------------------
+    //
+    // Below this point are internal implementation items.  No further public API.
+    //
+    //--------------------------------------------------------------------------------
+
+     /**
+      * Trie2 data structure in serialized form:
+      *
+      * UTrie2Header header;
+      * uint16_t index[header.index2Length];
+      * uint16_t data[header.shiftedDataLength<<2];  -- or uint32_t data[...]
+      *
+      * For Java, this is read from the stream into an instance of UTrie2Header.
+      * (The C version just places a struct over the raw serialized data.)
+      *
+      * @internal
+      */
+    static class UTrie2Header {
+        /** "Tri2" in big-endian US-ASCII (0x54726932) */
+        int signature;
+
+        /**
+         * options bit field (uint16_t):
+         * 15.. 4   reserved (0)
+         *  3.. 0   UTrie2ValueBits valueBits
+         */
+        int  options;
+
+        /** UTRIE2_INDEX_1_OFFSET..UTRIE2_MAX_INDEX_LENGTH  (uint16_t) */
+        int  indexLength;
+
+        /** (UTRIE2_DATA_START_OFFSET..UTRIE2_MAX_DATA_LENGTH)>>UTRIE2_INDEX_SHIFT  (uint16_t) */
+        int  shiftedDataLength;
+
+        /** Null index and data blocks, not shifted.  (uint16_t) */
+        int  index2NullOffset, dataNullOffset;
+
+        /**
+         * First code point of the single-value range ending with U+10ffff,
+         * rounded up and then shifted right by UTRIE2_SHIFT_1.  (uint16_t)
+         */
+        int shiftedHighStart;
+    }
+
+    //
+    //  Data members of UTrie2.
+    //
+    UTrie2Header  header;
+    char          index[];           // Index array.  Includes data for 16 bit Tries.
+    int           data16;            // Offset to data portion of the index array, if 16 bit data.
+                                     //    zero if 32 bit data.
+    int           data32[];          // NULL if 16b data is used via index
+
+    int           indexLength;
+    int           dataLength;
+    int           index2NullOffset;  // 0xffff if there is no dedicated index-2 null block
+    int           initialValue;
+
+    /** Value returned for out-of-range code points and illegal UTF-8. */
+    int           errorValue;
+
+    /* Start of the last range which ends at U+10ffff, and its value. */
+    int           highStart;
+    int           highValueIndex;
+
+    int           dataNullOffset;
+
+    /**
+     * Trie2 constants, defining shift widths, index array lengths, etc.
+     *
+     * These are needed for the runtime macros but users can treat these as
+     * implementation details and skip to the actual public API further below.
+     */
+
+    static final int UTRIE2_OPTIONS_VALUE_BITS_MASK=0x000f;
+
+
+    /** Shift size for getting the index-1 table offset. */
+    static final int UTRIE2_SHIFT_1=6+5;
+
+    /** Shift size for getting the index-2 table offset. */
+    static final int UTRIE2_SHIFT_2=5;
+
+    /**
+     * Difference between the two shift sizes,
+     * for getting an index-1 offset from an index-2 offset. 6=11-5
+     */
+    static final int UTRIE2_SHIFT_1_2=UTRIE2_SHIFT_1-UTRIE2_SHIFT_2;
+
+    /**
+     * Number of index-1 entries for the BMP. 32=0x20
+     * This part of the index-1 table is omitted from the serialized form.
+     */
+    static final int UTRIE2_OMITTED_BMP_INDEX_1_LENGTH=0x10000>>UTRIE2_SHIFT_1;
+
+    /** Number of entries in an index-2 block. 64=0x40 */
+    static final int UTRIE2_INDEX_2_BLOCK_LENGTH=1<<UTRIE2_SHIFT_1_2;
+
+    /** Mask for getting the lower bits for the in-index-2-block offset. */
+    static final int UTRIE2_INDEX_2_MASK=UTRIE2_INDEX_2_BLOCK_LENGTH-1;
+
+    /** Number of entries in a data block. 32=0x20 */
+    static final int UTRIE2_DATA_BLOCK_LENGTH=1<<UTRIE2_SHIFT_2;
+
+    /** Mask for getting the lower bits for the in-data-block offset. */
+    static final int UTRIE2_DATA_MASK=UTRIE2_DATA_BLOCK_LENGTH-1;
+
+    /**
+     * Shift size for shifting left the index array values.
+     * Increases possible data size with 16-bit index values at the cost
+     * of compactability.
+     * This requires data blocks to be aligned by UTRIE2_DATA_GRANULARITY.
+     */
+    static final int UTRIE2_INDEX_SHIFT=2;
+
+    /** The alignment size of a data block. Also the granularity for compaction. */
+    static final int UTRIE2_DATA_GRANULARITY=1<<UTRIE2_INDEX_SHIFT;
+
+    /**
+     * The part of the index-2 table for U+D800..U+DBFF stores values for
+     * lead surrogate code _units_ not code _points_.
+     * Values for lead surrogate code _points_ are indexed with this portion of the table.
+     * Length=32=0x20=0x400>>UTRIE2_SHIFT_2. (There are 1024=0x400 lead surrogates.)
+     */
+    static final int UTRIE2_LSCP_INDEX_2_OFFSET=0x10000>>UTRIE2_SHIFT_2;
+    static final int UTRIE2_LSCP_INDEX_2_LENGTH=0x400>>UTRIE2_SHIFT_2;
+
+    /** Count the lengths of both BMP pieces. 2080=0x820 */
+    static final int UTRIE2_INDEX_2_BMP_LENGTH=UTRIE2_LSCP_INDEX_2_OFFSET+UTRIE2_LSCP_INDEX_2_LENGTH;
+
+    /**
+     * The 2-byte UTF-8 version of the index-2 table follows at offset 2080=0x820.
+     * Length 32=0x20 for lead bytes C0..DF, regardless of UTRIE2_SHIFT_2.
+     */
+    static final int UTRIE2_UTF8_2B_INDEX_2_OFFSET=UTRIE2_INDEX_2_BMP_LENGTH;
+    static final int UTRIE2_UTF8_2B_INDEX_2_LENGTH=0x800>>6;  /* U+0800 is the first code point after 2-byte UTF-8 */
+
+    /**
+     * The index-1 table, only used for supplementary code points, at offset 2112=0x840.
+     * Variable length, for code points up to highStart, where the last single-value range starts.
+     * Maximum length 512=0x200=0x100000>>UTRIE2_SHIFT_1.
+     * (For 0x100000 supplementary code points U+10000..U+10ffff.)
+     *
+     * The part of the index-2 table for supplementary code points starts
+     * after this index-1 table.
+     *
+     * Both the index-1 table and the following part of the index-2 table
+     * are omitted completely if there is only BMP data.
+     */
+    static final int UTRIE2_INDEX_1_OFFSET=UTRIE2_UTF8_2B_INDEX_2_OFFSET+UTRIE2_UTF8_2B_INDEX_2_LENGTH;
+
+    /**
+     * The illegal-UTF-8 data block follows the ASCII block, at offset 128=0x80.
+     * Used with linear access for single bytes 0..0xbf for simple error handling.
+     * Length 64=0x40, not UTRIE2_DATA_BLOCK_LENGTH.
+     */
+    static final int UTRIE2_BAD_UTF8_DATA_OFFSET=0x80;
+
+    /**
+     * Implementation class for an iterator over a Trie2.
+     *
+     *   Iteration over a Trie2 first returns all of the ranges that are indexed by code points,
+     *   then returns the special alternate values for the lead surrogates
+     *
+     * @internal
+     */
+    class Trie2Iterator implements Iterator<Range> {
+
+        // The normal constructor that configures the iterator to cover the complete
+        //   contents of the Trie2
+        Trie2Iterator(ValueMapper vm) {
+            mapper    = vm;
+            nextStart = 0;
+            limitCP   = 0x110000;
+            doLeadSurrogates = true;
+        }
+
+        /**
+         *  The main next() function for Trie2 iterators
+         *
+         */
+        public Range next() {
+            if (!hasNext()) {
+                throw new NoSuchElementException();
+            }
+            if (nextStart >= limitCP) {
+                // Switch over from iterating normal code point values to
+                //   doing the alternate lead-surrogate values.
+                doingCodePoints = false;
+                nextStart = 0xd800;
+            }
+            int   endOfRange = 0;
+            int   val = 0;
+            int   mappedVal = 0;
+
+            if (doingCodePoints) {
+                // Iteration over code point values.
+                val = get(nextStart);
+                mappedVal = mapper.map(val);
+                endOfRange = rangeEnd(nextStart, limitCP, val);
+                // Loop once for each range in the Trie2 with the same raw (unmapped) value.
+                // Loop continues so long as the mapped values are the same.
+                for (;;) {
+                    if (endOfRange >= limitCP-1) {
+                        break;
+                    }
+                    val = get(endOfRange+1);
+                    if (mapper.map(val) != mappedVal) {
+                        break;
+                    }
+                    endOfRange = rangeEnd(endOfRange+1, limitCP, val);
+                }
+            } else {
+                // Iteration over the alternate lead surrogate values.
+                val = getFromU16SingleLead((char)nextStart);
+                mappedVal = mapper.map(val);
+                endOfRange = rangeEndLS((char)nextStart);
+                // Loop once for each range in the Trie2 with the same raw (unmapped) value.
+                // Loop continues so long as the mapped values are the same.
+                for (;;) {
+                    if (endOfRange >= 0xdbff) {
+                        break;
+                    }
+                    val = getFromU16SingleLead((char)(endOfRange+1));
+                    if (mapper.map(val) != mappedVal) {
+                        break;
+                    }
+                    endOfRange = rangeEndLS((char)(endOfRange+1));
+                }
+            }
+            returnValue.startCodePoint = nextStart;
+            returnValue.endCodePoint   = endOfRange;
+            returnValue.value          = mappedVal;
+            returnValue.leadSurrogate  = !doingCodePoints;
+            nextStart                  = endOfRange+1;
+            return returnValue;
+        }
+
+        /**
+         *
+         */
+        public boolean hasNext() {
+            return doingCodePoints && (doLeadSurrogates || nextStart < limitCP) || nextStart < 0xdc00;
+        }
+
+        private int rangeEndLS(char startingLS) {
+            if (startingLS >= 0xdbff) {
+                return 0xdbff;
+            }
+
+            int c;
+            int val = getFromU16SingleLead(startingLS);
+            for (c = startingLS+1; c <= 0x0dbff; c++) {
+                if (getFromU16SingleLead((char)c) != val) {
+                    break;
+                }
+            }
+            return c-1;
+        }
+
+        //
+        //   Iteration State Variables
+        //
+        private ValueMapper    mapper;
+        private Range          returnValue = new Range();
+        // The starting code point for the next range to be returned.
+        private int            nextStart;
+        // The upper limit for the last normal range to be returned.  Normally 0x110000, but
+        //   may be lower when iterating over the code points for a single lead surrogate.
+        private int            limitCP;
+
+        // True while iterating over the Trie2 values for code points.
+        // False while iterating over the alternate values for lead surrogates.
+        private boolean        doingCodePoints = true;
+
+        // True if the iterator should iterate the special values for lead surrogates in
+        //   addition to the normal values for code points.
+        private boolean        doLeadSurrogates = true;
+    }
+
+    /**
+     * Find the last character in a contiguous range of characters with the
+     * same Trie2 value as the input character.
+     *
+     * @param c  The character to begin with.
+     * @return   The last contiguous character with the same value.
+     */
+    int rangeEnd(int start, int limitp, int val) {
+        int c;
+        int limit = Math.min(highStart, limitp);
+
+        for (c = start+1; c < limit; c++) {
+            if (get(c) != val) {
+                break;
+            }
+        }
+        if (c >= highStart) {
+            c = limitp;
+        }
+        return c - 1;
+    }
+
+
+    //
+    //  Hashing implementation functions.  FNV hash.  Respected public domain algorithm.
+    //
+    private static int initHash() {
+        return 0x811c9DC5;  // unsigned 2166136261
+    }
+
+    private static int hashByte(int h, int b) {
+        h = h * 16777619;
+        h = h ^ b;
+        return h;
+    }
+
+    private static int hashUChar32(int h, int c) {
+        h = Trie2.hashByte(h, c & 255);
+        h = Trie2.hashByte(h, (c>>8) & 255);
+        h = Trie2.hashByte(h, c>>16);
+        return h;
+    }
+
+    private static int hashInt(int h, int i) {
+        h = Trie2.hashByte(h, i & 255);
+        h = Trie2.hashByte(h, (i>>8) & 255);
+        h = Trie2.hashByte(h, (i>>16) & 255);
+        h = Trie2.hashByte(h, (i>>24) & 255);
+        return h;
+    }
+
+}
diff --git a/tests/test_data/std/jdk/internal/icu/impl/Trie2_16.class b/tests/test_data/std/jdk/internal/icu/impl/Trie2_16.class
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diff --git a/tests/test_data/std/jdk/internal/icu/impl/Trie2_16.java b/tests/test_data/std/jdk/internal/icu/impl/Trie2_16.java
new file mode 100644
index 00000000..06bc79ae
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/icu/impl/Trie2_16.java
@@ -0,0 +1,167 @@
+/*
+ * Copyright (c) 2015, 2020, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/*
+ *******************************************************************************
+ * Copyright (C) 2009-2014, International Business Machines Corporation and
+ * others. All Rights Reserved.
+ *******************************************************************************
+ */
+
+package jdk.internal.icu.impl;
+
+import java.io.IOException;
+import java.nio.ByteBuffer;
+
+
+/**
+ * @author aheninger
+ *
+ * A read-only Trie2, holding 16 bit data values.
+ *
+ * A Trie2 is a highly optimized data structure for mapping from Unicode
+ * code points (values ranging from 0 to 0x10ffff) to a 16 or 32 bit value.
+ *
+ * See class Trie2 for descriptions of the API for accessing the contents of a trie.
+ *
+ * The fundamental data access methods are declared final in this class, with
+ * the intent that applications might gain a little extra performance, when compared
+ * with calling the same methods via the abstract UTrie2 base class.
+ */
+public final class Trie2_16 extends Trie2 {
+
+    /**
+     *  Internal constructor, not for general use.
+     */
+    Trie2_16() {
+    }
+
+
+    /**
+     * Create a Trie2 from its serialized form.  Inverse of utrie2_serialize().
+     * The serialized format is identical between ICU4C and ICU4J, so this function
+     * will work with serialized Trie2s from either.
+     *
+     * The serialized Trie2 in the bytes may be in either little or big endian byte order.
+     * This allows using serialized Tries from ICU4C without needing to consider the
+     * byte order of the system that created them.
+     *
+     * @param bytes a byte buffer to the serialized form of a UTrie2.
+     * @return An unserialized Trie2_16, ready for use.
+     * @throws IllegalArgumentException if the buffer does not contain a serialized Trie2.
+     * @throws IOException if a read error occurs in the buffer.
+     * @throws ClassCastException if the bytes contain a serialized Trie2_32
+     */
+    public static Trie2_16  createFromSerialized(ByteBuffer bytes) throws IOException {
+        return (Trie2_16) Trie2.createFromSerialized(bytes);
+    }
+
+    /**
+     * Get the value for a code point as stored in the Trie2.
+     *
+     * @param codePoint the code point
+     * @return the value
+     */
+    @Override
+    public final int get(int codePoint) {
+        int value;
+        int ix;
+
+        if (codePoint >= 0) {
+            if (codePoint < 0x0d800 || (codePoint > 0x0dbff && codePoint <= 0x0ffff)) {
+                // Ordinary BMP code point, excluding leading surrogates.
+                // BMP uses a single level lookup.  BMP index starts at offset 0 in the Trie2 index.
+                // 16 bit data is stored in the index array itself.
+                ix = index[codePoint >> UTRIE2_SHIFT_2];
+                ix = (ix << UTRIE2_INDEX_SHIFT) + (codePoint & UTRIE2_DATA_MASK);
+                value = index[ix];
+                return value;
+            }
+            if (codePoint <= 0xffff) {
+                // Lead Surrogate Code Point.  A Separate index section is stored for
+                // lead surrogate code units and code points.
+                //   The main index has the code unit data.
+                //   For this function, we need the code point data.
+                // Note: this expression could be refactored for slightly improved efficiency, but
+                //       surrogate code points will be so rare in practice that it's not worth it.
+                ix = index[UTRIE2_LSCP_INDEX_2_OFFSET + ((codePoint - 0xd800) >> UTRIE2_SHIFT_2)];
+                ix = (ix << UTRIE2_INDEX_SHIFT) + (codePoint & UTRIE2_DATA_MASK);
+                value = index[ix];
+                return value;
+            }
+            if (codePoint < highStart) {
+                // Supplemental code point, use two-level lookup.
+                ix = (UTRIE2_INDEX_1_OFFSET - UTRIE2_OMITTED_BMP_INDEX_1_LENGTH) + (codePoint >> UTRIE2_SHIFT_1);
+                ix = index[ix];
+                ix += (codePoint >> UTRIE2_SHIFT_2) & UTRIE2_INDEX_2_MASK;
+                ix = index[ix];
+                ix = (ix << UTRIE2_INDEX_SHIFT) + (codePoint & UTRIE2_DATA_MASK);
+                value = index[ix];
+                return value;
+            }
+            if (codePoint <= 0x10ffff) {
+                value = index[highValueIndex];
+                return value;
+            }
+        }
+
+        // Fall through.  The code point is outside of the legal range of 0..0x10ffff.
+        return errorValue;
+    }
+
+
+    /**
+     * Get a Trie2 value for a UTF-16 code unit.
+     *
+     * This function returns the same value as get() if the input
+     * character is outside of the lead surrogate range
+     *
+     * There are two values stored in a Trie2 for inputs in the lead
+     * surrogate range.  This function returns the alternate value,
+     * while Trie2.get() returns the main value.
+     *
+     * @param codeUnit a 16 bit code unit or lead surrogate value.
+     * @return the value
+     */
+    @Override
+    public int getFromU16SingleLead(char codeUnit) {
+        int value;
+        int ix;
+
+        // Because the input is a 16 bit char, we can skip the tests for it being in
+        // the BMP range.  It is.
+        ix = index[codeUnit >> UTRIE2_SHIFT_2];
+        ix = (ix << UTRIE2_INDEX_SHIFT) + (codeUnit & UTRIE2_DATA_MASK);
+        value = index[ix];
+        return value;
+    }
+
+    /**
+     * @return the number of bytes of the serialized trie
+     */
+    public int getSerializedLength() {
+        return 16+(header.indexLength+dataLength)*2;
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/icu/impl/UBiDiProps$IsAcceptable.class b/tests/test_data/std/jdk/internal/icu/impl/UBiDiProps$IsAcceptable.class
new file mode 100644
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diff --git a/tests/test_data/std/jdk/internal/icu/impl/UBiDiProps.class b/tests/test_data/std/jdk/internal/icu/impl/UBiDiProps.class
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diff --git a/tests/test_data/std/jdk/internal/icu/impl/UBiDiProps.java b/tests/test_data/std/jdk/internal/icu/impl/UBiDiProps.java
new file mode 100644
index 00000000..287ac38c
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/icu/impl/UBiDiProps.java
@@ -0,0 +1,274 @@
+/*
+ * Copyright (c) 2005, 2020, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+/*
+ *******************************************************************************
+ *
+ *   Copyright (C) 2004-2014, International Business Machines
+ *   Corporation and others.  All Rights Reserved.
+ *
+ *******************************************************************************
+ *   file name:  UBiDiProps.java
+ *   encoding:   US-ASCII
+ *   tab size:   8 (not used)
+ *   indentation:4
+ *
+ *   created on: 2005jan16
+ *   created by: Markus W. Scherer
+ *
+ *   Low-level Unicode bidi/shaping properties access.
+ *   Java port of ubidi_props.h/.c.
+ */
+
+package jdk.internal.icu.impl;
+
+import jdk.internal.icu.lang.UCharacter;
+import jdk.internal.icu.util.VersionInfo;
+
+import java.io.IOException;
+import java.nio.ByteBuffer;
+import java.util.MissingResourceException;
+
+public final class UBiDiProps {
+    // constructors etc. --------------------------------------------------- ***
+
+    // port of ubidi_openProps()
+    private UBiDiProps() throws IOException{
+        ByteBuffer bytes=ICUBinary.getRequiredData(DATA_FILE_NAME);
+        readData(bytes);
+    }
+
+    private void readData(ByteBuffer bytes) throws IOException {
+        // read the header
+        ICUBinary.readHeader(bytes, FMT, new IsAcceptable());
+
+        // read indexes[]
+        int i, count;
+        count=bytes.getInt();
+        if(count<IX_TOP) {
+            throw new IOException("indexes[0] too small in "+DATA_FILE_NAME);
+        }
+        indexes=new int[count];
+
+        indexes[0]=count;
+        for(i=1; i<count; ++i) {
+            indexes[i]=bytes.getInt();
+        }
+
+        // read the trie
+        trie=Trie2_16.createFromSerialized(bytes);
+        int expectedTrieLength=indexes[IX_TRIE_SIZE];
+        int trieLength=trie.getSerializedLength();
+        if(trieLength>expectedTrieLength) {
+            throw new IOException(DATA_FILE_NAME+": not enough bytes for the trie");
+        }
+        // skip padding after trie bytes
+        ICUBinary.skipBytes(bytes, expectedTrieLength-trieLength);
+
+        // read mirrors[]
+        count=indexes[IX_MIRROR_LENGTH];
+        if(count>0) {
+            mirrors=new int[count];
+            for(i=0; i<count; ++i) {
+                mirrors[i]=bytes.getInt();
+            }
+        }
+
+        // read jgArray[]
+        count=indexes[IX_JG_LIMIT]-indexes[IX_JG_START];
+        jgArray=new byte[count];
+        for(i=0; i<count; ++i) {
+            jgArray[i]=bytes.get();
+        }
+
+        // read jgArray2[]
+        count=indexes[IX_JG_LIMIT2]-indexes[IX_JG_START2];
+        jgArray2=new byte[count];
+        for(i=0; i<count; ++i) {
+            jgArray2[i]=bytes.get();
+        }
+    }
+
+    // implement ICUBinary.Authenticate
+    private static final class IsAcceptable implements ICUBinary.Authenticate {
+        public boolean isDataVersionAcceptable(byte version[]) {
+            return version[0]==2;
+        }
+    }
+
+    // property access functions ------------------------------------------- ***
+
+    public final int getClass(int c) {
+        return getClassFromProps(trie.get(c));
+    }
+
+    private final int getMirror(int c, int props) {
+        int delta=getMirrorDeltaFromProps(props);
+        if(delta!=ESC_MIRROR_DELTA) {
+            return c+delta;
+        } else {
+            /* look for mirror code point in the mirrors[] table */
+            int m;
+            int i, length;
+            int c2;
+
+            length=indexes[IX_MIRROR_LENGTH];
+
+            /* linear search */
+            for(i=0; i<length; ++i) {
+                m=mirrors[i];
+                c2=getMirrorCodePoint(m);
+                if(c==c2) {
+                    /* found c, return its mirror code point using the index in m */
+                    return getMirrorCodePoint(mirrors[getMirrorIndex(m)]);
+                } else if(c<c2) {
+                    break;
+                }
+            }
+
+            /* c not found, return it itself */
+            return c;
+        }
+    }
+
+    public final int getMirror(int c) {
+        int props=trie.get(c);
+        return getMirror(c, props);
+    }
+
+    public final int getJoiningType(int c) {
+        return (trie.get(c)&JT_MASK)>>JT_SHIFT;
+    }
+
+    public final int getJoiningGroup(int c) {
+        int start, limit;
+
+        start=indexes[IX_JG_START];
+        limit=indexes[IX_JG_LIMIT];
+        if(start<=c && c<limit) {
+            return (int)jgArray[c-start]&0xff;
+        }
+        start=indexes[IX_JG_START2];
+        limit=indexes[IX_JG_LIMIT2];
+        if(start<=c && c<limit) {
+            return (int)jgArray2[c-start]&0xff;
+        }
+        return UCharacter.JoiningGroup.NO_JOINING_GROUP;
+    }
+
+    public final int getPairedBracketType(int c) {
+        return (trie.get(c)&BPT_MASK)>>BPT_SHIFT;
+    }
+
+    public final int getPairedBracket(int c) {
+        int props=trie.get(c);
+        if((props&BPT_MASK)==0) {
+            return c;
+        } else {
+            return getMirror(c, props);
+        }
+    }
+
+    // data members -------------------------------------------------------- ***
+    private int indexes[];
+    private int mirrors[];
+    private byte jgArray[];
+    private byte jgArray2[];
+
+    private Trie2_16 trie;
+
+    // data format constants ----------------------------------------------- ***
+    @SuppressWarnings("deprecation")
+    private static final String DATA_FILE_NAME =
+            "/jdk/internal/icu/impl/data/icudt" +
+            VersionInfo.ICU_DATA_VERSION_PATH +
+            "/ubidi.icu";
+
+    /* format "BiDi" */
+    private static final int FMT=0x42694469;
+
+    /* indexes into indexes[] */
+    private static final int IX_TRIE_SIZE=2;
+    private static final int IX_MIRROR_LENGTH=3;
+
+    private static final int IX_JG_START=4;
+    private static final int IX_JG_LIMIT=5;
+    private static final int IX_JG_START2=6;  /* new in format version 2.2, ICU 54 */
+    private static final int IX_JG_LIMIT2=7;
+
+    private static final int IX_TOP=16;
+
+    // definitions for 16-bit bidi/shaping properties word ----------------- ***
+
+                          /* CLASS_SHIFT=0, */     /* bidi class: 5 bits (4..0) */
+    private static final int JT_SHIFT=5;           /* joining type: 3 bits (7..5) */
+
+    private static final int BPT_SHIFT=8;          /* Bidi_Paired_Bracket_Type(bpt): 2 bits (9..8) */
+
+    private static final int MIRROR_DELTA_SHIFT=13;        /* bidi mirroring delta: 3 bits (15..13) */
+
+    private static final int CLASS_MASK=    0x0000001f;
+    private static final int JT_MASK=       0x000000e0;
+    private static final int BPT_MASK=      0x00000300;
+
+    private static final int getClassFromProps(int props) {
+        return props&CLASS_MASK;
+    }
+    private static final boolean getFlagFromProps(int props, int shift) {
+        return ((props>>shift)&1)!=0;
+    }
+    private static final int getMirrorDeltaFromProps(int props) {
+        return (short)props>>MIRROR_DELTA_SHIFT;
+    }
+
+    private static final int ESC_MIRROR_DELTA=-4;
+
+    // definitions for 32-bit mirror table entry --------------------------- ***
+
+    /* the source Unicode code point takes 21 bits (20..0) */
+    private static final int MIRROR_INDEX_SHIFT=21;
+
+    private static final int getMirrorCodePoint(int m) {
+        return m&0x1fffff;
+    }
+    private static final int getMirrorIndex(int m) {
+        return m>>>MIRROR_INDEX_SHIFT;
+    }
+
+
+    /*
+     * public singleton instance
+     */
+    public static final UBiDiProps INSTANCE;
+
+    // This static initializer block must be placed after
+    // other static member initialization
+    static {
+        try {
+            INSTANCE = new UBiDiProps();
+        } catch (IOException e) {
+            throw new MissingResourceException(e.getMessage(),DATA_FILE_NAME,"");
+        }
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/icu/impl/UCharacterProperty$1.class b/tests/test_data/std/jdk/internal/icu/impl/UCharacterProperty$1.class
new file mode 100644
index 0000000000000000000000000000000000000000..88f457b65d9ad328e860540855ab56faf7ada3ca
GIT binary patch
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literal 0
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diff --git a/tests/test_data/std/jdk/internal/icu/impl/UCharacterProperty$BiDiIntProperty.class b/tests/test_data/std/jdk/internal/icu/impl/UCharacterProperty$BiDiIntProperty.class
new file mode 100644
index 0000000000000000000000000000000000000000..470e2664e2bc428db578c941d4e5a16b65d6b143
GIT binary patch
literal 654
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/icu/impl/UCharacterProperty$CombiningClassIntProperty.class b/tests/test_data/std/jdk/internal/icu/impl/UCharacterProperty$CombiningClassIntProperty.class
new file mode 100644
index 0000000000000000000000000000000000000000..27a4961e1c8f84c01a7c2c676d3e9c021fe46ef0
GIT binary patch
literal 663
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diff --git a/tests/test_data/std/jdk/internal/icu/impl/UCharacterProperty$IntProperty.class b/tests/test_data/std/jdk/internal/icu/impl/UCharacterProperty$IntProperty.class
new file mode 100644
index 0000000000000000000000000000000000000000..4fc4b7ef6997bdf836e290347081c986b017d2ad
GIT binary patch
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diff --git a/tests/test_data/std/jdk/internal/icu/impl/UCharacterProperty$IsAcceptable.class b/tests/test_data/std/jdk/internal/icu/impl/UCharacterProperty$IsAcceptable.class
new file mode 100644
index 0000000000000000000000000000000000000000..4408456746eedd032eb5d3f8ee5f864ee3bb5e14
GIT binary patch
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diff --git a/tests/test_data/std/jdk/internal/icu/impl/UCharacterProperty$NormQuickCheckIntProperty.class b/tests/test_data/std/jdk/internal/icu/impl/UCharacterProperty$NormQuickCheckIntProperty.class
new file mode 100644
index 0000000000000000000000000000000000000000..6d174a90c34f3c3de86e1ffd792dcf8062446dab
GIT binary patch
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diff --git a/tests/test_data/std/jdk/internal/icu/impl/UCharacterProperty.class b/tests/test_data/std/jdk/internal/icu/impl/UCharacterProperty.class
new file mode 100644
index 0000000000000000000000000000000000000000..f31a52a93a7be403d474824f8378d6e69c075b18
GIT binary patch
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diff --git a/tests/test_data/std/jdk/internal/icu/impl/UCharacterProperty.java b/tests/test_data/std/jdk/internal/icu/impl/UCharacterProperty.java
new file mode 100644
index 00000000..474b169e
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/icu/impl/UCharacterProperty.java
@@ -0,0 +1,629 @@
+/*
+ * Copyright (c) 2005, 2020, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+/*
+ *******************************************************************************
+ * Copyright (C) 1996-2014, International Business Machines Corporation and
+ * others. All Rights Reserved.
+ *******************************************************************************
+ */
+
+package jdk.internal.icu.impl;
+
+import java.io.IOException;
+import java.nio.ByteBuffer;
+import java.util.Iterator;
+import java.util.MissingResourceException;
+
+import jdk.internal.icu.lang.UCharacter.HangulSyllableType;
+import jdk.internal.icu.lang.UCharacter.NumericType;
+import jdk.internal.icu.text.UTF16;
+import jdk.internal.icu.text.UnicodeSet;
+import jdk.internal.icu.util.VersionInfo;
+
+/**
+* <p>Internal class used for Unicode character property database.</p>
+* <p>This classes store binary data read from uprops.icu.
+* It does not have the capability to parse the data into more high-level
+* information. It only returns bytes of information when required.</p>
+* <p>Due to the form most commonly used for retrieval, array of char is used
+* to store the binary data.</p>
+* <p>UCharacterPropertyDB also contains information on accessing indexes to
+* significant points in the binary data.</p>
+* <p>Responsibility for molding the binary data into more meaning form lies on
+* <a href=UCharacter.html>UCharacter</a>.</p>
+* @author Syn Wee Quek
+* @since release 2.1, february 1st 2002
+*/
+
+public final class UCharacterProperty
+{
+    // public data members -----------------------------------------------
+
+    /*
+     * public singleton instance
+     */
+    public static final UCharacterProperty INSTANCE;
+
+    /**
+     * Trie data
+     */
+    public Trie2_16 m_trie_;
+
+    /**
+     * Unicode version
+     */
+    public VersionInfo m_unicodeVersion_;
+
+    /**
+     * Character type mask
+     */
+    public static final int TYPE_MASK = 0x1F;
+
+    // uprops.h enum UPropertySource --------------------------------------- ***
+
+    /** From uchar.c/uprops.icu main trie */
+    public static final int SRC_CHAR=1;
+    /** From uchar.c/uprops.icu properties vectors trie */
+    public static final int SRC_PROPSVEC=2;
+    /** From ubidi_props.c/ubidi.icu */
+    public static final int SRC_BIDI=5;
+    /** From normalizer2impl.cpp/nfc.nrm */
+    public static final int SRC_NFC=8;
+    /** From normalizer2impl.cpp/nfkc.nrm */
+    public static final int SRC_NFKC=9;
+
+    // public methods ----------------------------------------------------
+
+    /**
+     * Gets the main property value for code point ch.
+     * @param ch code point whose property value is to be retrieved
+     * @return property value of code point
+     */
+    public final int getProperty(int ch)
+    {
+        return m_trie_.get(ch);
+    }
+
+    /**
+     * Gets the unicode additional properties.
+     * Java version of C u_getUnicodeProperties().
+     * @param codepoint codepoint whose additional properties is to be
+     *                  retrieved
+     * @param column The column index.
+     * @return unicode properties
+     */
+    public int getAdditional(int codepoint, int column) {
+        assert column >= 0;
+        if (column >= m_additionalColumnsCount_) {
+            return 0;
+        }
+        return m_additionalVectors_[m_additionalTrie_.get(codepoint) + column];
+    }
+
+    /**
+     * <p>Get the "age" of the code point.</p>
+     * <p>The "age" is the Unicode version when the code point was first
+     * designated (as a non-character or for Private Use) or assigned a
+     * character.</p>
+     * <p>This can be useful to avoid emitting code points to receiving
+     * processes that do not accept newer characters.</p>
+     * <p>The data is from the UCD file DerivedAge.txt.</p>
+     * <p>This API does not check the validity of the codepoint.</p>
+     * @param codepoint The code point.
+     * @return the Unicode version number
+     */
+    public VersionInfo getAge(int codepoint)
+    {
+        int version = getAdditional(codepoint, 0) >> AGE_SHIFT_;
+        return VersionInfo.getInstance(
+                           (version >> FIRST_NIBBLE_SHIFT_) & LAST_NIBBLE_MASK_,
+                           version & LAST_NIBBLE_MASK_, 0, 0);
+    }
+
+    // int-value and enumerated properties --------------------------------- ***
+
+    public int getType(int c) {
+        return getProperty(c)&TYPE_MASK;
+    }
+
+    /*
+     * Map some of the Grapheme Cluster Break values to Hangul Syllable Types.
+     * Hangul_Syllable_Type is fully redundant with a subset of Grapheme_Cluster_Break.
+     */
+    private static final int /* UHangulSyllableType */ gcbToHst[]={
+        HangulSyllableType.NOT_APPLICABLE,   /* U_GCB_OTHER */
+        HangulSyllableType.NOT_APPLICABLE,   /* U_GCB_CONTROL */
+        HangulSyllableType.NOT_APPLICABLE,   /* U_GCB_CR */
+        HangulSyllableType.NOT_APPLICABLE,   /* U_GCB_EXTEND */
+        HangulSyllableType.LEADING_JAMO,     /* U_GCB_L */
+        HangulSyllableType.NOT_APPLICABLE,   /* U_GCB_LF */
+        HangulSyllableType.LV_SYLLABLE,      /* U_GCB_LV */
+        HangulSyllableType.LVT_SYLLABLE,     /* U_GCB_LVT */
+        HangulSyllableType.TRAILING_JAMO,    /* U_GCB_T */
+        HangulSyllableType.VOWEL_JAMO        /* U_GCB_V */
+        /*
+         * Omit GCB values beyond what we need for hst.
+         * The code below checks for the array length.
+         */
+    };
+
+    private class IntProperty {
+        int column;  // SRC_PROPSVEC column, or "source" if mask==0
+        int mask;
+        int shift;
+
+        IntProperty(int column, int mask, int shift) {
+            this.column=column;
+            this.mask=mask;
+            this.shift=shift;
+        }
+
+        IntProperty(int source) {
+            this.column=source;
+            this.mask=0;
+        }
+
+        int getValue(int c) {
+            // systematic, directly stored properties
+            return (getAdditional(c, column)&mask)>>>shift;
+        }
+    }
+
+    private class BiDiIntProperty extends IntProperty {
+        BiDiIntProperty() {
+            super(SRC_BIDI);
+        }
+    }
+
+    private class CombiningClassIntProperty extends IntProperty {
+        CombiningClassIntProperty(int source) {
+            super(source);
+        }
+    }
+
+    private class NormQuickCheckIntProperty extends IntProperty {  // UCHAR_NF*_QUICK_CHECK properties
+        int which;
+        int max;
+
+        NormQuickCheckIntProperty(int source, int which, int max) {
+            super(source);
+            this.which=which;
+            this.max=max;
+        }
+    }
+
+    private IntProperty intProp =  new BiDiIntProperty() {  // BIDI_PAIRED_BRACKET_TYPE
+        int getValue(int c) {
+            return UBiDiProps.INSTANCE.getPairedBracketType(c);
+        }
+    };
+
+    public int getIntPropertyValue(int c, int which) {
+        if (which == BIDI_PAIRED_BRACKET_TYPE) {
+            return intProp.getValue(c);
+        }
+        return 0; // undefined
+    }
+
+    /**
+     * Forms a supplementary code point from the argument character<br>
+     * Note this is for internal use hence no checks for the validity of the
+     * surrogate characters are done
+     * @param lead lead surrogate character
+     * @param trail trailing surrogate character
+     * @return code point of the supplementary character
+     */
+    public static int getRawSupplementary(char lead, char trail)
+    {
+        return (lead << LEAD_SURROGATE_SHIFT_) + trail + SURROGATE_OFFSET_;
+    }
+
+    /**
+     * Gets the type mask
+     * @param type character type
+     * @return mask
+     */
+    public static final int getMask(int type)
+    {
+        return 1 << type;
+    }
+
+    /**
+     * Returns the digit values of characters like 'A' - 'Z', normal,
+     * half-width and full-width. This method assumes that the other digit
+     * characters are checked by the calling method.
+     * @param ch character to test
+     * @return -1 if ch is not a character of the form 'A' - 'Z', otherwise
+     *         its corresponding digit will be returned.
+     */
+    public static int getEuropeanDigit(int ch) {
+        if ((ch > 0x7a && ch < 0xff21)
+            || ch < 0x41 || (ch > 0x5a && ch < 0x61)
+            || ch > 0xff5a || (ch > 0xff3a && ch < 0xff41)) {
+            return -1;
+        }
+        if (ch <= 0x7a) {
+            // ch >= 0x41 or ch < 0x61
+            return ch + 10 - ((ch <= 0x5a) ? 0x41 : 0x61);
+        }
+        // ch >= 0xff21
+        if (ch <= 0xff3a) {
+            return ch + 10 - 0xff21;
+        }
+        // ch >= 0xff41 && ch <= 0xff5a
+        return ch + 10 - 0xff41;
+    }
+
+    public int digit(int c) {
+        int value = getNumericTypeValue(getProperty(c)) - NTV_DECIMAL_START_;
+        if(value<=9) {
+            return value;
+        } else {
+            return -1;
+        }
+    }
+
+    // protected variables -----------------------------------------------
+
+    /**
+     * Extra property trie
+     */
+    Trie2_16 m_additionalTrie_;
+    /**
+     * Extra property vectors, 1st column for age and second for binary
+     * properties.
+     */
+    int m_additionalVectors_[];
+    /**
+     * Number of additional columns
+     */
+    int m_additionalColumnsCount_;
+    /**
+     * Maximum values for block, bits used as in vector word
+     * 0
+     */
+    int m_maxBlockScriptValue_;
+    /**
+     * Maximum values for script, bits used as in vector word
+     * 0
+     */
+     int m_maxJTGValue_;
+    /**
+     * Script_Extensions data
+     */
+    public char[] m_scriptExtensions_;
+
+    // private variables -------------------------------------------------
+
+    /**
+     * Default name of the datafile
+     */
+    @SuppressWarnings("deprecation")
+    private static final String DATA_FILE_NAME_ =
+            "/jdk/internal/icu/impl/data/icudt" +
+            VersionInfo.ICU_DATA_VERSION_PATH +
+            "/uprops.icu";
+
+    /**
+     * Shift value for lead surrogate to form a supplementary character.
+     */
+    private static final int LEAD_SURROGATE_SHIFT_ = 10;
+    /**
+     * Offset to add to combined surrogate pair to avoid masking.
+     */
+    private static final int SURROGATE_OFFSET_ =
+                           UTF16.SUPPLEMENTARY_MIN_VALUE -
+                           (UTF16.SURROGATE_MIN_VALUE <<
+                           LEAD_SURROGATE_SHIFT_) -
+                           UTF16.TRAIL_SURROGATE_MIN_VALUE;
+
+
+    // property data constants -------------------------------------------------
+
+    /**
+     * Numeric types and values in the main properties words.
+     */
+    private static final int NUMERIC_TYPE_VALUE_SHIFT_ = 6;
+    private static final int getNumericTypeValue(int props) {
+        return props >> NUMERIC_TYPE_VALUE_SHIFT_;
+    }
+
+    /* constants for the storage form of numeric types and values */
+    /** No numeric value. */
+    private static final int NTV_NONE_ = 0;
+    /** Decimal digits: nv=0..9 */
+    private static final int NTV_DECIMAL_START_ = 1;
+    /** Other digits: nv=0..9 */
+    private static final int NTV_DIGIT_START_ = 11;
+    /** Small integers: nv=0..154 */
+    private static final int NTV_NUMERIC_START_ = 21;
+
+    private static final int ntvGetType(int ntv) {
+        return
+            (ntv==NTV_NONE_) ? NumericType.NONE :
+            (ntv<NTV_DIGIT_START_) ?  NumericType.DECIMAL :
+            (ntv<NTV_NUMERIC_START_) ? NumericType.DIGIT :
+            NumericType.NUMERIC;
+    }
+
+    /*
+     * Properties in vector word 0
+     * Bits
+     * 31..24   DerivedAge version major/minor one nibble each
+     * 23..22   3..1: Bits 21..20 & 7..0 = Script_Extensions index
+     *             3: Script value from Script_Extensions
+     *             2: Script=Inherited
+     *             1: Script=Common
+     *             0: Script=bits 21..20 & 7..0
+     * 21..20   Bits 9..8 of the UScriptCode, or index to Script_Extensions
+     * 19..17   East Asian Width
+     * 16.. 8   UBlockCode
+     *  7.. 0   UScriptCode, or index to Script_Extensions
+     */
+
+    /**
+     * Script_Extensions: mask includes Script
+     */
+    public static final int SCRIPT_X_MASK = 0x00f000ff;
+    //private static final int SCRIPT_X_SHIFT = 22;
+
+    // The UScriptCode or Script_Extensions index is split across two bit fields.
+    // (Starting with Unicode 13/ICU 66/2019 due to more varied Script_Extensions.)
+    // Shift the high bits right by 12 to assemble the full value.
+    public static final int SCRIPT_HIGH_MASK = 0x00300000;
+    public static final int SCRIPT_HIGH_SHIFT = 12;
+    public static final int MAX_SCRIPT = 0x3ff;
+
+    /**
+     * Integer properties mask and shift values for East Asian cell width.
+     * Equivalent to icu4c UPROPS_EA_MASK
+     */
+    private static final int EAST_ASIAN_MASK_ = 0x000e0000;
+    /**
+     * Integer properties mask and shift values for East Asian cell width.
+     * Equivalent to icu4c UPROPS_EA_SHIFT
+     */
+    private static final int EAST_ASIAN_SHIFT_ = 17;
+    /**
+     * Integer properties mask and shift values for blocks.
+     * Equivalent to icu4c UPROPS_BLOCK_MASK
+     */
+    private static final int BLOCK_MASK_ = 0x0001ff00;
+    /**
+     * Integer properties mask and shift values for blocks.
+     * Equivalent to icu4c UPROPS_BLOCK_SHIFT
+     */
+    private static final int BLOCK_SHIFT_ = 8;
+    /**
+     * Integer properties mask and shift values for scripts.
+     * Equivalent to icu4c UPROPS_SHIFT_LOW_MASK.
+     */
+    public static final int SCRIPT_LOW_MASK = 0x000000ff;
+
+    public static final int mergeScriptCodeOrIndex(int scriptX) {
+        return
+            ((scriptX & SCRIPT_HIGH_MASK) >> SCRIPT_HIGH_SHIFT) |
+            (scriptX & SCRIPT_LOW_MASK);
+    }
+
+    /**
+     * Additional properties used in internal trie data
+     */
+    /*
+     * Properties in vector word 1
+     * Each bit encodes one binary property.
+     * The following constants represent the bit number, use 1<<UPROPS_XYZ.
+     * UPROPS_BINARY_1_TOP<=32!
+     *
+     * Keep this list of property enums in sync with
+     * propListNames[] in icu/source/tools/genprops/props2.c!
+     *
+     * ICU 2.6/uprops format version 3.2 stores full properties instead of "Other_".
+     */
+    private static final int WHITE_SPACE_PROPERTY_ = 0;
+    private static final int DASH_PROPERTY_ = 1;
+    private static final int HYPHEN_PROPERTY_ = 2;
+    private static final int QUOTATION_MARK_PROPERTY_ = 3;
+    private static final int TERMINAL_PUNCTUATION_PROPERTY_ = 4;
+    private static final int MATH_PROPERTY_ = 5;
+    private static final int HEX_DIGIT_PROPERTY_ = 6;
+    private static final int ASCII_HEX_DIGIT_PROPERTY_ = 7;
+    private static final int ALPHABETIC_PROPERTY_ = 8;
+    private static final int IDEOGRAPHIC_PROPERTY_ = 9;
+    private static final int DIACRITIC_PROPERTY_ = 10;
+    private static final int EXTENDER_PROPERTY_ = 11;
+    private static final int NONCHARACTER_CODE_POINT_PROPERTY_ = 12;
+    private static final int GRAPHEME_EXTEND_PROPERTY_ = 13;
+    private static final int GRAPHEME_LINK_PROPERTY_ = 14;
+    private static final int IDS_BINARY_OPERATOR_PROPERTY_ = 15;
+    private static final int IDS_TRINARY_OPERATOR_PROPERTY_ = 16;
+    private static final int RADICAL_PROPERTY_ = 17;
+    private static final int UNIFIED_IDEOGRAPH_PROPERTY_ = 18;
+    private static final int DEFAULT_IGNORABLE_CODE_POINT_PROPERTY_ = 19;
+    private static final int DEPRECATED_PROPERTY_ = 20;
+    private static final int LOGICAL_ORDER_EXCEPTION_PROPERTY_ = 21;
+    private static final int XID_START_PROPERTY_ = 22;
+    private static final int XID_CONTINUE_PROPERTY_ = 23;
+    private static final int ID_START_PROPERTY_    = 24;
+    private static final int ID_CONTINUE_PROPERTY_ = 25;
+    private static final int GRAPHEME_BASE_PROPERTY_ = 26;
+    private static final int S_TERM_PROPERTY_ = 27;
+    private static final int VARIATION_SELECTOR_PROPERTY_ = 28;
+    private static final int PATTERN_SYNTAX = 29;                   /* new in ICU 3.4 and Unicode 4.1 */
+    private static final int PATTERN_WHITE_SPACE = 30;
+
+    /*
+     * Properties in vector word 2
+     * Bits
+     * 31..26   reserved
+     * 25..20   Line Break
+     * 19..15   Sentence Break
+     * 14..10   Word Break
+     *  9.. 5   Grapheme Cluster Break
+     *  4.. 0   Decomposition Type
+     */
+    private static final int LB_MASK          = 0x03f00000;
+    private static final int LB_SHIFT         = 20;
+
+    private static final int SB_MASK          = 0x000f8000;
+    private static final int SB_SHIFT         = 15;
+
+    private static final int WB_MASK          = 0x00007c00;
+    private static final int WB_SHIFT         = 10;
+
+    private static final int GCB_MASK         = 0x000003e0;
+    private static final int GCB_SHIFT        = 5;
+
+    /**
+     * Integer properties mask for decomposition type.
+     * Equivalent to icu4c UPROPS_DT_MASK.
+     */
+    private static final int DECOMPOSITION_TYPE_MASK_ = 0x0000001f;
+
+    /**
+     * First nibble shift
+     */
+    private static final int FIRST_NIBBLE_SHIFT_ = 0x4;
+    /**
+     * Second nibble mask
+     */
+    private static final int LAST_NIBBLE_MASK_ = 0xF;
+    /**
+     * Age value shift
+     */
+    private static final int AGE_SHIFT_ = 24;
+
+    // private constructors --------------------------------------------------
+
+    /**
+     * Constructor
+     * @exception IOException thrown when data reading fails or data corrupted
+     */
+    private UCharacterProperty() throws IOException
+    {
+        // jar access
+        ByteBuffer bytes=ICUBinary.getRequiredData(DATA_FILE_NAME_);
+        m_unicodeVersion_ = ICUBinary.readHeaderAndDataVersion(bytes, DATA_FORMAT, new IsAcceptable());
+        // Read or skip the 16 indexes.
+        int propertyOffset = bytes.getInt();
+        /* exceptionOffset = */ bytes.getInt();
+        /* caseOffset = */ bytes.getInt();
+        int additionalOffset = bytes.getInt();
+        int additionalVectorsOffset = bytes.getInt();
+        m_additionalColumnsCount_ = bytes.getInt();
+        int scriptExtensionsOffset = bytes.getInt();
+        int reservedOffset7 = bytes.getInt();
+        /* reservedOffset8 = */ bytes.getInt();
+        /* dataTopOffset = */ bytes.getInt();
+        m_maxBlockScriptValue_ = bytes.getInt();
+        m_maxJTGValue_ = bytes.getInt();
+        ICUBinary.skipBytes(bytes, (16 - 12) << 2);
+
+        // read the main properties trie
+        m_trie_ = Trie2_16.createFromSerialized(bytes);
+        int expectedTrieLength = (propertyOffset - 16) * 4;
+        int trieLength = m_trie_.getSerializedLength();
+        if(trieLength > expectedTrieLength) {
+            throw new IOException("uprops.icu: not enough bytes for main trie");
+        }
+        // skip padding after trie bytes
+        ICUBinary.skipBytes(bytes, expectedTrieLength - trieLength);
+
+        // skip unused intervening data structures
+        ICUBinary.skipBytes(bytes, (additionalOffset - propertyOffset) * 4);
+
+        if(m_additionalColumnsCount_ > 0) {
+            // reads the additional property block
+            m_additionalTrie_ = Trie2_16.createFromSerialized(bytes);
+            expectedTrieLength = (additionalVectorsOffset-additionalOffset)*4;
+            trieLength = m_additionalTrie_.getSerializedLength();
+            if(trieLength > expectedTrieLength) {
+                throw new IOException("uprops.icu: not enough bytes for additional-properties trie");
+            }
+            // skip padding after trie bytes
+            ICUBinary.skipBytes(bytes, expectedTrieLength - trieLength);
+
+            // additional properties
+            int size = scriptExtensionsOffset - additionalVectorsOffset;
+            m_additionalVectors_ = new int[size];
+            for (int i = 0; i < size; i ++) {
+                m_additionalVectors_[i] = bytes.getInt();
+            }
+        }
+
+        // Script_Extensions
+        int numChars = (reservedOffset7 - scriptExtensionsOffset) * 2;
+        if(numChars > 0) {
+            m_scriptExtensions_ = new char[numChars];
+            for(int i = 0; i < numChars; ++i) {
+                m_scriptExtensions_[i] = bytes.getChar();
+            }
+        }
+    }
+
+    private static final class IsAcceptable implements ICUBinary.Authenticate {
+        // @Override when we switch to Java 6
+        public boolean isDataVersionAcceptable(byte version[]) {
+            return version[0] == 7;
+        }
+    }
+
+    private static final int DATA_FORMAT = 0x5550726F;  // "UPro"
+
+    public void upropsvec_addPropertyStarts(UnicodeSet set) {
+        /* add the start code point of each same-value range of the properties vectors trie */
+        if(m_additionalColumnsCount_>0) {
+            /* if m_additionalColumnsCount_==0 then the properties vectors trie may not be there at all */
+            Iterator<Trie2.Range> trieIterator = m_additionalTrie_.iterator();
+            Trie2.Range range;
+            while(trieIterator.hasNext() && !(range=trieIterator.next()).leadSurrogate) {
+                set.add(range.startCodePoint);
+            }
+        }
+    }
+
+    // This static initializer block must be placed after
+    // other static member initialization
+    static {
+        try {
+            INSTANCE = new UCharacterProperty();
+        }
+        catch (IOException e) {
+            throw new MissingResourceException(e.getMessage(),DATA_FILE_NAME_,"");
+        }
+    }
+
+
+    // Moved from UProperty.java
+    /**
+     * Enumerated property Bidi_Paired_Bracket_Type (new in Unicode 6.3).
+     * Used in UAX #9: Unicode Bidirectional Algorithm
+     * (http://www.unicode.org/reports/tr9/)
+     * Returns UCharacter.BidiPairedBracketType values.
+     * @stable ICU 52
+     */
+    public static final int BIDI_PAIRED_BRACKET_TYPE = 0x1015;
+
+}
diff --git a/tests/test_data/std/jdk/internal/icu/impl/UnicodeSetStringSpan$OffsetList.class b/tests/test_data/std/jdk/internal/icu/impl/UnicodeSetStringSpan$OffsetList.class
new file mode 100644
index 0000000000000000000000000000000000000000..34a5d596f7e0e95f0a26434d007fc6d6c2f82800
GIT binary patch
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/icu/impl/UnicodeSetStringSpan.class b/tests/test_data/std/jdk/internal/icu/impl/UnicodeSetStringSpan.class
new file mode 100644
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HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/icu/impl/UnicodeSetStringSpan.java b/tests/test_data/std/jdk/internal/icu/impl/UnicodeSetStringSpan.java
new file mode 100644
index 00000000..331ab234
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/icu/impl/UnicodeSetStringSpan.java
@@ -0,0 +1,1175 @@
+/*
+ * Copyright (c) 2015, 2022, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/*
+ ******************************************************************************
+ *
+ *   Copyright (C) 2009-2014, International Business Machines
+ *   Corporation and others.  All Rights Reserved.
+ *
+ ******************************************************************************
+ */
+
+package jdk.internal.icu.impl;
+
+import java.util.ArrayList;
+
+import jdk.internal.icu.text.UTF16;
+import jdk.internal.icu.text.UnicodeSet;
+import jdk.internal.icu.text.UnicodeSet.SpanCondition;
+import jdk.internal.icu.util.OutputInt;
+
+/*
+ * Implement span() etc. for a set with strings.
+ * Avoid recursion because of its exponential complexity.
+ * Instead, try multiple paths at once and track them with an IndexList.
+ */
+public class UnicodeSetStringSpan {
+
+    /*
+     * Which span() variant will be used? The object is either built for one variant and used once,
+     * or built for all and may be used many times.
+     */
+    public static final int WITH_COUNT    = 0x40;  // spanAndCount() may be called
+    public static final int FWD           = 0x20;
+    public static final int BACK          = 0x10;
+    // public static final int UTF16      = 8;
+    public static final int CONTAINED     = 2;
+    public static final int NOT_CONTAINED = 1;
+
+    public static final int ALL = 0x7f;
+
+    public static final int FWD_UTF16_CONTAINED      = FWD  | /* UTF16 | */    CONTAINED;
+    public static final int FWD_UTF16_NOT_CONTAINED  = FWD  | /* UTF16 | */NOT_CONTAINED;
+    public static final int BACK_UTF16_CONTAINED     = BACK | /* UTF16 | */    CONTAINED;
+    public static final int BACK_UTF16_NOT_CONTAINED = BACK | /* UTF16 | */NOT_CONTAINED;
+
+    /**
+     * Special spanLength short values. (since Java has not unsigned byte type)
+     * All code points in the string are contained in the parent set.
+     */
+    static final short ALL_CP_CONTAINED = 0xff;
+
+    /** The spanLength is >=0xfe. */
+    static final short LONG_SPAN = ALL_CP_CONTAINED - 1;
+
+    /** Set for span(). Same as parent but without strings. */
+    private UnicodeSet spanSet;
+
+    /**
+     * Set for span(not contained).
+     * Same as spanSet, plus characters that start or end strings.
+     */
+    private UnicodeSet spanNotSet;
+
+    /** The strings of the parent set. */
+    private ArrayList<String> strings;
+
+    /** The lengths of span(), spanBack() etc. for each string. */
+    private short[] spanLengths;
+
+    /** Maximum lengths of relevant strings. */
+    private int maxLength16;
+
+    /** Are there strings that are not fully contained in the code point set? */
+    private boolean someRelevant;
+
+    /** Set up for all variants of span()? */
+    private boolean all;
+
+    /** Span helper */
+    private OffsetList offsets;
+
+    /**
+     * Constructs for all variants of span(), or only for any one variant.
+     * Initializes as little as possible, for single use.
+     */
+    public UnicodeSetStringSpan(final UnicodeSet set, final ArrayList<String> setStrings, int which) {
+        spanSet = new UnicodeSet(0, 0x10ffff);
+        // TODO: With Java 6, just take the parent set's strings as is,
+        // as a NavigableSet<String>, rather than as an ArrayList copy of the set of strings.
+        // Then iterate via the first() and higher() methods.
+        // (We do not want to create multiple Iterator objects in each span().)
+        // See ICU ticket #7454.
+        strings = setStrings;
+        all = (which == ALL);
+        spanSet.retainAll(set);
+        if (0 != (which & NOT_CONTAINED)) {
+            // Default to the same sets.
+            // addToSpanNotSet() will create a separate set if necessary.
+            spanNotSet = spanSet;
+        }
+        offsets = new OffsetList();
+
+        // Determine if the strings even need to be taken into account at all for span() etc.
+        // If any string is relevant, then all strings need to be used for
+        // span(longest match) but only the relevant ones for span(while contained).
+        // TODO: Possible optimization: Distinguish CONTAINED vs. LONGEST_MATCH
+        // and do not store UTF-8 strings if !thisRelevant and CONTAINED.
+        // (Only store irrelevant UTF-8 strings for LONGEST_MATCH where they are relevant after all.)
+        // Also count the lengths of the UTF-8 versions of the strings for memory allocation.
+        int stringsLength = strings.size();
+
+        int i, spanLength;
+        someRelevant = false;
+        for (i = 0; i < stringsLength;) {
+            String string = strings.get(i);
+            int length16 = string.length();
+            if (length16 == 0) {
+                // Remove the empty string.
+                strings.remove(i);
+                --stringsLength;
+                continue;
+            }
+            spanLength = spanSet.span(string, SpanCondition.CONTAINED);
+            if (spanLength < length16) { // Relevant string.
+                someRelevant = true;
+            }
+            if (/* (0 != (which & UTF16)) && */ length16 > maxLength16) {
+                maxLength16 = length16;
+            }
+            ++i;
+        }
+        if (!someRelevant && (which & WITH_COUNT) == 0) {
+            return;
+        }
+
+        // Freeze after checking for the need to use strings at all because freezing
+        // a set takes some time and memory which are wasted if there are no relevant strings.
+        if (all) {
+            spanSet.freeze();
+        }
+
+        int spanBackLengthsOffset;
+
+        // Allocate a block of meta data.
+        int allocSize;
+        if (all) {
+            // 2 sets of span lengths
+            allocSize = stringsLength * (2);
+        } else {
+            allocSize = stringsLength; // One set of span lengths.
+        }
+        spanLengths = new short[allocSize];
+
+        if (all) {
+            // Store span lengths for all span() variants.
+            spanBackLengthsOffset = stringsLength;
+        } else {
+            // Store span lengths for only one span() variant.
+            spanBackLengthsOffset = 0;
+        }
+
+        // Set the meta data and spanNotSet and write the UTF-8 strings.
+
+        for (i = 0; i < stringsLength; ++i) {
+            String string = strings.get(i);
+            int length16 = string.length();
+            spanLength = spanSet.span(string, SpanCondition.CONTAINED);
+            if (spanLength < length16) { // Relevant string.
+                if (true /* 0 != (which & UTF16) */) {
+                    if (0 != (which & CONTAINED)) {
+                        if (0 != (which & FWD)) {
+                            spanLengths[i] = makeSpanLengthByte(spanLength);
+                        }
+                        if (0 != (which & BACK)) {
+                            spanLength = length16
+                                    - spanSet.spanBack(string, length16, SpanCondition.CONTAINED);
+                            spanLengths[spanBackLengthsOffset + i] = makeSpanLengthByte(spanLength);
+                        }
+                    } else /* not CONTAINED, not all, but NOT_CONTAINED */{
+                        spanLengths[i] = spanLengths[spanBackLengthsOffset + i] = 0; // Only store a relevant/irrelevant
+                                                                                     // flag.
+                    }
+                }
+                if (0 != (which & NOT_CONTAINED)) {
+                    // Add string start and end code points to the spanNotSet so that
+                    // a span(while not contained) stops before any string.
+                    int c;
+                    if (0 != (which & FWD)) {
+                        c = string.codePointAt(0);
+                        addToSpanNotSet(c);
+                    }
+                    if (0 != (which & BACK)) {
+                        c = string.codePointBefore(length16);
+                        addToSpanNotSet(c);
+                    }
+                }
+            } else { // Irrelevant string.
+                if (all) {
+                    spanLengths[i] = spanLengths[spanBackLengthsOffset + i] = ALL_CP_CONTAINED;
+                } else {
+                    // All spanXYZLengths pointers contain the same address.
+                    spanLengths[i] = ALL_CP_CONTAINED;
+                }
+            }
+        }
+
+        // Finish.
+        if (all) {
+            spanNotSet.freeze();
+        }
+    }
+
+    /**
+     * Do the strings need to be checked in span() etc.?
+     *
+     * @return true if strings need to be checked (call span() here),
+     *         false if not (use a BMPSet for best performance).
+     */
+    public boolean needsStringSpanUTF16() {
+        return someRelevant;
+    }
+
+    /** For fast UnicodeSet::contains(c). */
+    public boolean contains(int c) {
+        return spanSet.contains(c);
+    }
+
+    /**
+     * Adds a starting or ending string character to the spanNotSet
+     * so that a character span ends before any string.
+     */
+    private void addToSpanNotSet(int c) {
+        if (spanNotSet == null || spanNotSet == spanSet) {
+            if (spanSet.contains(c)) {
+                return; // Nothing to do.
+            }
+            spanNotSet = spanSet.cloneAsThawed();
+        }
+        spanNotSet.add(c);
+    }
+
+    /*
+     * Note: In span() when spanLength==0
+     * (after a string match, or at the beginning after an empty code point span)
+     * and in spanNot() and spanNotUTF8(),
+     * string matching could use a binary search because all string matches are done
+     * from the same start index.
+     *
+     * For UTF-8, this would require a comparison function that returns UTF-16 order.
+     *
+     * This optimization should not be necessary for normal UnicodeSets because most sets have no strings, and most sets
+     * with strings have very few very short strings. For cases with many strings, it might be better to use a different
+     * API and implementation with a DFA (state machine).
+     */
+
+    /*
+     * Algorithm for span(SpanCondition.CONTAINED)
+     *
+     * Theoretical algorithm:
+     * - Iterate through the string, and at each code point boundary:
+     *   + If the code point there is in the set, then remember to continue after it.
+     *   + If a set string matches at the current position, then remember to continue after it.
+     *   + Either recursively span for each code point or string match, or recursively span
+     *     for all but the shortest one and iteratively continue the span with the shortest local match.
+     *   + Remember the longest recursive span (the farthest end point).
+     *   + If there is no match at the current position,
+     *     neither for the code point there nor for any set string,
+     *     then stop and return the longest recursive span length.
+     *
+     * Optimized implementation:
+     *
+     * (We assume that most sets will have very few very short strings.
+     * A span using a string-less set is extremely fast.)
+     *
+     * Create and cache a spanSet which contains all of the single code points of the original set
+     * but none of its strings.
+     *
+     * - Start with spanLength=spanSet.span(SpanCondition.CONTAINED).
+     * - Loop:
+     *   + Try to match each set string at the end of the spanLength.
+     *     ~ Set strings that start with set-contained code points
+     *       must be matched with a partial overlap
+     *       because the recursive algorithm would have tried to match them at every position.
+     *     ~ Set strings that entirely consist of set-contained code points
+     *       are irrelevant for span(SpanCondition.CONTAINED)
+     *       because the recursive algorithm would continue after them anyway and
+     *       find the longest recursive match from their end.
+     *     ~ Rather than recursing, note each end point of a set string match.
+     *   + If no set string matched after spanSet.span(),
+     *     then return with where the spanSet.span() ended.
+     *   + If at least one set string matched after spanSet.span(),
+     *     then pop the shortest string match end point and continue the loop,
+     *     trying to match all set strings from there.
+     *   + If at least one more set string matched after a previous string match, then test if the
+     *     code point after the previous string match is also contained in the set.
+     *     Continue the loop with the shortest end point of
+     *     either this code point or a matching set string.
+     *   + If no more set string matched after a previous string match,
+     *     then try another spanLength=spanSet.span(SpanCondition.CONTAINED).
+     *     Stop if spanLength==0, otherwise continue the loop.
+     *
+     * By noting each end point of a set string match, the function visits each string position at most once and
+     * finishes in linear time.
+     *
+     * The recursive algorithm may visit the same string position many times
+     * if multiple paths lead to it and finishes in exponential time.
+     */
+
+    /*
+     * Algorithm for span(SIMPLE)
+     *
+     * Theoretical algorithm:
+     * - Iterate through the string, and at each code point boundary:
+     *   + If the code point there is in the set, then remember to continue after it.
+     *   + If a set string matches at the current position, then remember to continue after it.
+     *   + Continue from the farthest match position and ignore all others.
+     *   + If there is no match at the current position, then stop and return the current position.
+     *
+     * Optimized implementation:
+     *
+     * (Same assumption and spanSet as above.)
+     *
+     * - Start with spanLength=spanSet.span(SpanCondition.CONTAINED).
+     * - Loop:
+     *   + Try to match each set string at the end of the spanLength.
+     *     ~ Set strings that start with set-contained code points
+     *       must be matched with a partial overlap
+     *       because the standard algorithm would have tried to match them earlier.
+     *     ~ Set strings that entirely consist of set-contained code points
+     *       must be matched with a full overlap because the longest-match algorithm
+     *       would hide set string matches that end earlier.
+     *       Such set strings need not be matched earlier inside the code point span
+     *       because the standard algorithm would then have
+     *       continued after the set string match anyway.
+     *     ~ Remember the longest set string match (farthest end point)
+     *       from the earliest starting point.
+     *   + If no set string matched after spanSet.span(),
+     *     then return with where the spanSet.span() ended.
+     *   + If at least one set string matched,
+     *     then continue the loop after the longest match from the earliest position.
+     *   + If no more set string matched after a previous string match,
+     *     then try another spanLength=spanSet.span(SpanCondition.CONTAINED).
+     *     Stop if spanLength==0, otherwise continue the loop.
+     */
+    /**
+     * Spans a string.
+     *
+     * @param s The string to be spanned
+     * @param start The start index that the span begins
+     * @param spanCondition The span condition
+     * @return the limit (exclusive end) of the span
+     */
+    public int span(CharSequence s, int start, SpanCondition spanCondition) {
+        if (spanCondition == SpanCondition.NOT_CONTAINED) {
+            return spanNot(s, start, null);
+        }
+        int spanLimit = spanSet.span(s, start, SpanCondition.CONTAINED);
+        if (spanLimit == s.length()) {
+            return spanLimit;
+        }
+        return spanWithStrings(s, start, spanLimit, spanCondition);
+    }
+
+    /**
+     * Synchronized method for complicated spans using the offsets.
+     * Avoids synchronization for simple cases.
+     *
+     * @param spanLimit = spanSet.span(s, start, CONTAINED)
+     */
+    private synchronized int spanWithStrings(CharSequence s, int start, int spanLimit,
+            SpanCondition spanCondition) {
+        // Consider strings; they may overlap with the span.
+        int initSize = 0;
+        if (spanCondition == SpanCondition.CONTAINED) {
+            // Use offset list to try all possibilities.
+            initSize = maxLength16;
+        }
+        offsets.setMaxLength(initSize);
+        int length = s.length();
+        int pos = spanLimit, rest = length - spanLimit;
+        int spanLength = spanLimit - start;
+        int i, stringsLength = strings.size();
+        for (;;) {
+            if (spanCondition == SpanCondition.CONTAINED) {
+                for (i = 0; i < stringsLength; ++i) {
+                    int overlap = spanLengths[i];
+                    if (overlap == ALL_CP_CONTAINED) {
+                        continue; // Irrelevant string.
+                    }
+                    String string = strings.get(i);
+
+                    int length16 = string.length();
+
+                    // Try to match this string at pos-overlap..pos.
+                    if (overlap >= LONG_SPAN) {
+                        overlap = length16;
+                        // While contained: No point matching fully inside the code point span.
+                        overlap = string.offsetByCodePoints(overlap, -1); // Length of the string minus the last code
+                                                                          // point.
+                    }
+                    if (overlap > spanLength) {
+                        overlap = spanLength;
+                    }
+                    int inc = length16 - overlap; // Keep overlap+inc==length16.
+                    for (;;) {
+                        if (inc > rest) {
+                            break;
+                        }
+                        // Try to match if the increment is not listed already.
+                        if (!offsets.containsOffset(inc) && matches16CPB(s, pos - overlap, length, string, length16)) {
+                            if (inc == rest) {
+                                return length; // Reached the end of the string.
+                            }
+                            offsets.addOffset(inc);
+                        }
+                        if (overlap == 0) {
+                            break;
+                        }
+                        --overlap;
+                        ++inc;
+                    }
+                }
+            } else /* SIMPLE */{
+                int maxInc = 0, maxOverlap = 0;
+                for (i = 0; i < stringsLength; ++i) {
+                    int overlap = spanLengths[i];
+                    // For longest match, we do need to try to match even an all-contained string
+                    // to find the match from the earliest start.
+
+                    String string = strings.get(i);
+
+                    int length16 = string.length();
+
+                    // Try to match this string at pos-overlap..pos.
+                    if (overlap >= LONG_SPAN) {
+                        overlap = length16;
+                        // Longest match: Need to match fully inside the code point span
+                        // to find the match from the earliest start.
+                    }
+                    if (overlap > spanLength) {
+                        overlap = spanLength;
+                    }
+                    int inc = length16 - overlap; // Keep overlap+inc==length16.
+                    for (;;) {
+                        if (inc > rest || overlap < maxOverlap) {
+                            break;
+                        }
+                        // Try to match if the string is longer or starts earlier.
+                        if ((overlap > maxOverlap || /* redundant overlap==maxOverlap && */inc > maxInc)
+                                && matches16CPB(s, pos - overlap, length, string, length16)) {
+                            maxInc = inc; // Longest match from earliest start.
+                            maxOverlap = overlap;
+                            break;
+                        }
+                        --overlap;
+                        ++inc;
+                    }
+                }
+
+                if (maxInc != 0 || maxOverlap != 0) {
+                    // Longest-match algorithm, and there was a string match.
+                    // Simply continue after it.
+                    pos += maxInc;
+                    rest -= maxInc;
+                    if (rest == 0) {
+                        return length; // Reached the end of the string.
+                    }
+                    spanLength = 0; // Match strings from after a string match.
+                    continue;
+                }
+            }
+            // Finished trying to match all strings at pos.
+
+            if (spanLength != 0 || pos == 0) {
+                // The position is after an unlimited code point span (spanLength!=0),
+                // not after a string match.
+                // The only position where spanLength==0 after a span is pos==0.
+                // Otherwise, an unlimited code point span is only tried again when no
+                // strings match, and if such a non-initial span fails we stop.
+                if (offsets.isEmpty()) {
+                    return pos; // No strings matched after a span.
+                }
+                // Match strings from after the next string match.
+            } else {
+                // The position is after a string match (or a single code point).
+                if (offsets.isEmpty()) {
+                    // No more strings matched after a previous string match.
+                    // Try another code point span from after the last string match.
+                    spanLimit = spanSet.span(s, pos, SpanCondition.CONTAINED);
+                    spanLength = spanLimit - pos;
+                    if (spanLength == rest || // Reached the end of the string, or
+                            spanLength == 0 // neither strings nor span progressed.
+                    ) {
+                        return spanLimit;
+                    }
+                    pos += spanLength;
+                    rest -= spanLength;
+                    continue; // spanLength>0: Match strings from after a span.
+                } else {
+                    // Try to match only one code point from after a string match if some
+                    // string matched beyond it, so that we try all possible positions
+                    // and don't overshoot.
+                    spanLength = spanOne(spanSet, s, pos, rest);
+                    if (spanLength > 0) {
+                        if (spanLength == rest) {
+                            return length; // Reached the end of the string.
+                        }
+                        // Match strings after this code point.
+                        // There cannot be any increments below it because UnicodeSet strings
+                        // contain multiple code points.
+                        pos += spanLength;
+                        rest -= spanLength;
+                        offsets.shift(spanLength);
+                        spanLength = 0;
+                        continue; // Match strings from after a single code point.
+                    }
+                    // Match strings from after the next string match.
+                }
+            }
+            int minOffset = offsets.popMinimum(null);
+            pos += minOffset;
+            rest -= minOffset;
+            spanLength = 0; // Match strings from after a string match.
+        }
+    }
+
+    /**
+     * Spans a string and counts the smallest number of set elements on any path across the span.
+     *
+     * <p>For proper counting, we cannot ignore strings that are fully contained in code point spans.
+     *
+     * <p>If the set does not have any fully-contained strings, then we could optimize this
+     * like span(), but such sets are likely rare, and this is at least still linear.
+     *
+     * @param s The string to be spanned
+     * @param start The start index that the span begins
+     * @param spanCondition The span condition
+     * @param outCount The count
+     * @return the limit (exclusive end) of the span
+     */
+    public int spanAndCount(CharSequence s, int start, SpanCondition spanCondition,
+            OutputInt outCount) {
+        if (spanCondition == SpanCondition.NOT_CONTAINED) {
+            return spanNot(s, start, outCount);
+        }
+        // Consider strings; they may overlap with the span,
+        // and they may result in a smaller count that with just code points.
+        if (spanCondition == SpanCondition.CONTAINED) {
+            return spanContainedAndCount(s, start, outCount);
+        }
+        // SIMPLE (not synchronized, does not use offsets)
+        int stringsLength = strings.size();
+        int length = s.length();
+        int pos = start;
+        int rest = length - start;
+        int count = 0;
+        while (rest != 0) {
+            // Try to match the next code point.
+            int cpLength = spanOne(spanSet, s, pos, rest);
+            int maxInc = (cpLength > 0) ? cpLength : 0;
+            // Try to match all of the strings.
+            for (int i = 0; i < stringsLength; ++i) {
+                String string = strings.get(i);
+                int length16 = string.length();
+                if (maxInc < length16 && length16 <= rest &&
+                        matches16CPB(s, pos, length, string, length16)) {
+                    maxInc = length16;
+                }
+            }
+            // We are done if there is no match beyond pos.
+            if (maxInc == 0) {
+                outCount.value = count;
+                return pos;
+            }
+            // Continue from the longest match.
+            ++count;
+            pos += maxInc;
+            rest -= maxInc;
+        }
+        outCount.value = count;
+        return pos;
+    }
+
+    private synchronized int spanContainedAndCount(CharSequence s, int start, OutputInt outCount) {
+        // Use offset list to try all possibilities.
+        offsets.setMaxLength(maxLength16);
+        int stringsLength = strings.size();
+        int length = s.length();
+        int pos = start;
+        int rest = length - start;
+        int count = 0;
+        while (rest != 0) {
+            // Try to match the next code point.
+            int cpLength = spanOne(spanSet, s, pos, rest);
+            if (cpLength > 0) {
+                offsets.addOffsetAndCount(cpLength, count + 1);
+            }
+            // Try to match all of the strings.
+            for (int i = 0; i < stringsLength; ++i) {
+                String string = strings.get(i);
+                int length16 = string.length();
+                // Note: If the strings were sorted by length, then we could also
+                // avoid trying to match if there is already a match of the same length.
+                if (length16 <= rest && !offsets.hasCountAtOffset(length16, count + 1) &&
+                        matches16CPB(s, pos, length, string, length16)) {
+                    offsets.addOffsetAndCount(length16, count + 1);
+                }
+            }
+            // We are done if there is no match beyond pos.
+            if (offsets.isEmpty()) {
+                outCount.value = count;
+                return pos;
+            }
+            // Continue from the nearest match.
+            int minOffset = offsets.popMinimum(outCount);
+            count = outCount.value;
+            pos += minOffset;
+            rest -= minOffset;
+        }
+        outCount.value = count;
+        return pos;
+    }
+
+    /**
+     * Span a string backwards.
+     *
+     * @param s The string to be spanned
+     * @param spanCondition The span condition
+     * @return The string index which starts the span (i.e. inclusive).
+     */
+    public synchronized int spanBack(CharSequence s, int length, SpanCondition spanCondition) {
+        if (spanCondition == SpanCondition.NOT_CONTAINED) {
+            return spanNotBack(s, length);
+        }
+        int pos = spanSet.spanBack(s, length, SpanCondition.CONTAINED);
+        if (pos == 0) {
+            return 0;
+        }
+        int spanLength = length - pos;
+
+        // Consider strings; they may overlap with the span.
+        int initSize = 0;
+        if (spanCondition == SpanCondition.CONTAINED) {
+            // Use offset list to try all possibilities.
+            initSize = maxLength16;
+        }
+        offsets.setMaxLength(initSize);
+        int i, stringsLength = strings.size();
+        int spanBackLengthsOffset = 0;
+        if (all) {
+            spanBackLengthsOffset = stringsLength;
+        }
+        for (;;) {
+            if (spanCondition == SpanCondition.CONTAINED) {
+                for (i = 0; i < stringsLength; ++i) {
+                    int overlap = spanLengths[spanBackLengthsOffset + i];
+                    if (overlap == ALL_CP_CONTAINED) {
+                        continue; // Irrelevant string.
+                    }
+                    String string = strings.get(i);
+
+                    int length16 = string.length();
+
+                    // Try to match this string at pos-(length16-overlap)..pos-length16.
+                    if (overlap >= LONG_SPAN) {
+                        overlap = length16;
+                        // While contained: No point matching fully inside the code point span.
+                        int len1 = 0;
+                        len1 = string.offsetByCodePoints(0, 1);
+                        overlap -= len1; // Length of the string minus the first code point.
+                    }
+                    if (overlap > spanLength) {
+                        overlap = spanLength;
+                    }
+                    int dec = length16 - overlap; // Keep dec+overlap==length16.
+                    for (;;) {
+                        if (dec > pos) {
+                            break;
+                        }
+                        // Try to match if the decrement is not listed already.
+                        if (!offsets.containsOffset(dec) && matches16CPB(s, pos - dec, length, string, length16)) {
+                            if (dec == pos) {
+                                return 0; // Reached the start of the string.
+                            }
+                            offsets.addOffset(dec);
+                        }
+                        if (overlap == 0) {
+                            break;
+                        }
+                        --overlap;
+                        ++dec;
+                    }
+                }
+            } else /* SIMPLE */{
+                int maxDec = 0, maxOverlap = 0;
+                for (i = 0; i < stringsLength; ++i) {
+                    int overlap = spanLengths[spanBackLengthsOffset + i];
+                    // For longest match, we do need to try to match even an all-contained string
+                    // to find the match from the latest end.
+
+                    String string = strings.get(i);
+
+                    int length16 = string.length();
+
+                    // Try to match this string at pos-(length16-overlap)..pos-length16.
+                    if (overlap >= LONG_SPAN) {
+                        overlap = length16;
+                        // Longest match: Need to match fully inside the code point span
+                        // to find the match from the latest end.
+                    }
+                    if (overlap > spanLength) {
+                      overlap = spanLength;
+                    }
+                    int dec = length16 - overlap; // Keep dec+overlap==length16.
+                    for (;;) {
+                        if (dec > pos || overlap < maxOverlap) {
+                            break;
+                        }
+                        // Try to match if the string is longer or ends later.
+                        if ((overlap > maxOverlap || /* redundant overlap==maxOverlap && */dec > maxDec)
+                                && matches16CPB(s, pos - dec, length, string, length16)) {
+                            maxDec = dec; // Longest match from latest end.
+                            maxOverlap = overlap;
+                            break;
+                        }
+                        --overlap;
+                        ++dec;
+                    }
+                }
+
+                if (maxDec != 0 || maxOverlap != 0) {
+                    // Longest-match algorithm, and there was a string match.
+                    // Simply continue before it.
+                    pos -= maxDec;
+                    if (pos == 0) {
+                        return 0; // Reached the start of the string.
+                    }
+                    spanLength = 0; // Match strings from before a string match.
+                    continue;
+                }
+            }
+            // Finished trying to match all strings at pos.
+
+            if (spanLength != 0 || pos == length) {
+                // The position is before an unlimited code point span (spanLength!=0),
+                // not before a string match.
+                // The only position where spanLength==0 before a span is pos==length.
+                // Otherwise, an unlimited code point span is only tried again when no
+                // strings match, and if such a non-initial span fails we stop.
+                if (offsets.isEmpty()) {
+                    return pos; // No strings matched before a span.
+                }
+                // Match strings from before the next string match.
+            } else {
+                // The position is before a string match (or a single code point).
+                if (offsets.isEmpty()) {
+                    // No more strings matched before a previous string match.
+                    // Try another code point span from before the last string match.
+                    int oldPos = pos;
+                    pos = spanSet.spanBack(s, oldPos, SpanCondition.CONTAINED);
+                    spanLength = oldPos - pos;
+                    if (pos == 0 || // Reached the start of the string, or
+                            spanLength == 0 // neither strings nor span progressed.
+                    ) {
+                        return pos;
+                    }
+                    continue; // spanLength>0: Match strings from before a span.
+                } else {
+                    // Try to match only one code point from before a string match if some
+                    // string matched beyond it, so that we try all possible positions
+                    // and don't overshoot.
+                    spanLength = spanOneBack(spanSet, s, pos);
+                    if (spanLength > 0) {
+                        if (spanLength == pos) {
+                            return 0; // Reached the start of the string.
+                        }
+                        // Match strings before this code point.
+                        // There cannot be any decrements below it because UnicodeSet strings
+                        // contain multiple code points.
+                        pos -= spanLength;
+                        offsets.shift(spanLength);
+                        spanLength = 0;
+                        continue; // Match strings from before a single code point.
+                    }
+                    // Match strings from before the next string match.
+                }
+            }
+            pos -= offsets.popMinimum(null);
+            spanLength = 0; // Match strings from before a string match.
+        }
+    }
+
+    /**
+     * Algorithm for spanNot()==span(SpanCondition.NOT_CONTAINED)
+     *
+     * Theoretical algorithm:
+     * - Iterate through the string, and at each code point boundary:
+     *   + If the code point there is in the set, then return with the current position.
+     *   + If a set string matches at the current position, then return with the current position.
+     *
+     * Optimized implementation:
+     *
+     * (Same assumption as for span() above.)
+     *
+     * Create and cache a spanNotSet which contains
+     * all of the single code points of the original set but none of its strings.
+     * For each set string add its initial code point to the spanNotSet.
+     * (Also add its final code point for spanNotBack().)
+     *
+     * - Loop:
+     *   + Do spanLength=spanNotSet.span(SpanCondition.NOT_CONTAINED).
+     *   + If the current code point is in the original set, then return the current position.
+     *   + If any set string matches at the current position, then return the current position.
+     *   + If there is no match at the current position, neither for the code point
+     *     there nor for any set string, then skip this code point and continue the loop.
+     *     This happens for set-string-initial code points that were added to spanNotSet
+     *     when there is not actually a match for such a set string.
+     *
+     * @param s The string to be spanned
+     * @param start The start index that the span begins
+     * @param outCount If not null: Receives the number of code points across the span.
+     * @return the limit (exclusive end) of the span
+     */
+    private int spanNot(CharSequence s, int start, OutputInt outCount) {
+        int length = s.length();
+        int pos = start, rest = length - start;
+        int stringsLength = strings.size();
+        int count = 0;
+        do {
+            // Span until we find a code point from the set,
+            // or a code point that starts or ends some string.
+            int spanLimit;
+            if (outCount == null) {
+                spanLimit = spanNotSet.span(s, pos, SpanCondition.NOT_CONTAINED);
+            } else {
+                spanLimit = spanNotSet.spanAndCount(s, pos, SpanCondition.NOT_CONTAINED, outCount);
+                outCount.value = count = count + outCount.value;
+            }
+            if (spanLimit == length) {
+                return length; // Reached the end of the string.
+            }
+            pos = spanLimit;
+            rest = length - spanLimit;
+
+            // Check whether the current code point is in the original set,
+            // without the string starts and ends.
+            int cpLength = spanOne(spanSet, s, pos, rest);
+            if (cpLength > 0) {
+                return pos; // There is a set element at pos.
+            }
+
+            // Try to match the strings at pos.
+            for (int i = 0; i < stringsLength; ++i) {
+                if (spanLengths[i] == ALL_CP_CONTAINED) {
+                    continue; // Irrelevant string.
+                }
+                String string = strings.get(i);
+
+                int length16 = string.length();
+                if (length16 <= rest && matches16CPB(s, pos, length, string, length16)) {
+                    return pos; // There is a set element at pos.
+                }
+            }
+
+            // The span(while not contained) ended on a string start/end which is
+            // not in the original set. Skip this code point and continue.
+            // cpLength<0
+            pos -= cpLength;
+            rest += cpLength;
+            ++count;
+        } while (rest != 0);
+        if (outCount != null) {
+            outCount.value = count;
+        }
+        return length; // Reached the end of the string.
+    }
+
+    private int spanNotBack(CharSequence s, int length) {
+        int pos = length;
+        int i, stringsLength = strings.size();
+        do {
+            // Span until we find a code point from the set,
+            // or a code point that starts or ends some string.
+            pos = spanNotSet.spanBack(s, pos, SpanCondition.NOT_CONTAINED);
+            if (pos == 0) {
+                return 0; // Reached the start of the string.
+            }
+
+            // Check whether the current code point is in the original set,
+            // without the string starts and ends.
+            int cpLength = spanOneBack(spanSet, s, pos);
+            if (cpLength > 0) {
+                return pos; // There is a set element at pos.
+            }
+
+            // Try to match the strings at pos.
+            for (i = 0; i < stringsLength; ++i) {
+                // Use spanLengths rather than a spanLengths pointer because
+                // it is easier and we only need to know whether the string is irrelevant
+                // which is the same in either array.
+                if (spanLengths[i] == ALL_CP_CONTAINED) {
+                    continue; // Irrelevant string.
+                }
+                String string = strings.get(i);
+
+                int length16 = string.length();
+                if (length16 <= pos && matches16CPB(s, pos - length16, length, string, length16)) {
+                    return pos; // There is a set element at pos.
+                }
+            }
+
+            // The span(while not contained) ended on a string start/end which is
+            // not in the original set. Skip this code point and continue.
+            // cpLength<0
+            pos += cpLength;
+        } while (pos != 0);
+        return 0; // Reached the start of the string.
+    }
+
+    static short makeSpanLengthByte(int spanLength) {
+        // 0xfe==UnicodeSetStringSpan::LONG_SPAN
+        return spanLength < LONG_SPAN ? (short) spanLength : LONG_SPAN;
+    }
+
+    // Compare strings without any argument checks. Requires length>0.
+    private static boolean matches16(CharSequence s, int start, final String t, int length) {
+        int end = start + length;
+        while (length-- > 0) {
+            if (s.charAt(--end) != t.charAt(length)) {
+                return false;
+            }
+        }
+        return true;
+    }
+
+    /**
+     * Compare 16-bit Unicode strings (which may be malformed UTF-16)
+     * at code point boundaries.
+     * That is, each edge of a match must not be in the middle of a surrogate pair.
+     * @param s       The string to match in.
+     * @param start   The start index of s.
+     * @param limit   The limit of the subsequence of s being spanned.
+     * @param t       The substring to be matched in s.
+     * @param tlength The length of t.
+     */
+    static boolean matches16CPB(CharSequence s, int start, int limit, final String t, int tlength) {
+        return matches16(s, start, t, tlength)
+                && !(0 < start && Character.isHighSurrogate(s.charAt(start - 1)) &&
+                        Character.isLowSurrogate(s.charAt(start)))
+                && !((start + tlength) < limit && Character.isHighSurrogate(s.charAt(start + tlength - 1)) &&
+                        Character.isLowSurrogate(s.charAt(start + tlength)));
+    }
+
+    /**
+     * Does the set contain the next code point?
+     * If so, return its length; otherwise return its negative length.
+     */
+    static int spanOne(final UnicodeSet set, CharSequence s, int start, int length) {
+        char c = s.charAt(start);
+        if (c >= 0xd800 && c <= 0xdbff && length >= 2) {
+            char c2 = s.charAt(start + 1);
+            if (UTF16.isTrailSurrogate(c2)) {
+                int supplementary = UCharacterProperty.getRawSupplementary(c, c2);
+                return set.contains(supplementary) ? 2 : -2;
+            }
+        }
+        return set.contains(c) ? 1 : -1;
+    }
+
+    static int spanOneBack(final UnicodeSet set, CharSequence s, int length) {
+        char c = s.charAt(length - 1);
+        if (c >= 0xdc00 && c <= 0xdfff && length >= 2) {
+            char c2 = s.charAt(length - 2);
+            if (UTF16.isLeadSurrogate(c2)) {
+                int supplementary = UCharacterProperty.getRawSupplementary(c2, c);
+                return set.contains(supplementary) ? 2 : -2;
+            }
+        }
+        return set.contains(c) ? 1 : -1;
+    }
+
+    /**
+     * Helper class for UnicodeSetStringSpan.
+     *
+     * <p>List of offsets from the current position from where to try matching
+     * a code point or a string.
+     * Stores offsets rather than indexes to simplify the code and use the same list
+     * for both increments (in span()) and decrements (in spanBack()).
+     *
+     * <p>Assumption: The maximum offset is limited, and the offsets that are stored at any one time
+     * are relatively dense, that is,
+     * there are normally no gaps of hundreds or thousands of offset values.
+     *
+     * <p>This class optionally also tracks the minimum non-negative count for each position,
+     * intended to count the smallest number of elements of any path leading to that position.
+     *
+     * <p>The implementation uses a circular buffer of count integers,
+     * each indicating whether the corresponding offset is in the list,
+     * and its path element count.
+     * This avoids inserting into a sorted list of offsets (or absolute indexes)
+     * and physically moving part of the list.
+     *
+     * <p>Note: In principle, the caller should setMaxLength() to
+     * the maximum of the max string length and U16_LENGTH/U8_LENGTH
+     * to account for "long" single code points.
+     *
+     * <p>Note: An earlier version did not track counts and stored only byte flags.
+     * With boolean flags, if maxLength were guaranteed to be no more than 32 or 64,
+     * the list could be stored as bit flags in a single integer.
+     * Rather than handling a circular buffer with a start list index,
+     * the integer would simply be shifted when lower offsets are removed.
+     * UnicodeSet does not have a limit on the lengths of strings.
+     */
+    private static final class OffsetList {
+        private int[] list;
+        private int length;
+        private int start;
+
+        public OffsetList() {
+            list = new int[16];  // default size
+        }
+
+        public void setMaxLength(int maxLength) {
+            if (maxLength > list.length) {
+                list = new int[maxLength];
+            }
+            clear();
+        }
+
+        public void clear() {
+            for (int i = list.length; i-- > 0;) {
+                list[i] = 0;
+            }
+            start = length = 0;
+        }
+
+        public boolean isEmpty() {
+            return (length == 0);
+        }
+
+        /**
+         * Reduces all stored offsets by delta, used when the current position moves by delta.
+         * There must not be any offsets lower than delta.
+         * If there is an offset equal to delta, it is removed.
+         *
+         * @param delta [1..maxLength]
+         */
+        public void shift(int delta) {
+            int i = start + delta;
+            if (i >= list.length) {
+                i -= list.length;
+            }
+            if (list[i] != 0) {
+                list[i] = 0;
+                --length;
+            }
+            start = i;
+        }
+
+        /**
+         * Adds an offset. The list must not contain it yet.
+         * @param offset [1..maxLength]
+         */
+        public void addOffset(int offset) {
+            int i = start + offset;
+            if (i >= list.length) {
+                i -= list.length;
+            }
+            assert list[i] == 0;
+            list[i] = 1;
+            ++length;
+        }
+
+        /**
+         * Adds an offset and updates its count.
+         * The list may already contain the offset.
+         * @param offset [1..maxLength]
+         */
+        public void addOffsetAndCount(int offset, int count) {
+            assert count > 0;
+            int i = start + offset;
+            if (i >= list.length) {
+                i -= list.length;
+            }
+            if (list[i] == 0) {
+                list[i] = count;
+                ++length;
+            } else if (count < list[i]) {
+                list[i] = count;
+            }
+        }
+
+        /**
+         * @param offset [1..maxLength]
+         */
+        public boolean containsOffset(int offset) {
+            int i = start + offset;
+            if (i >= list.length) {
+                i -= list.length;
+            }
+            return list[i] != 0;
+        }
+
+        /**
+         * @param offset [1..maxLength]
+         */
+        public boolean hasCountAtOffset(int offset, int count) {
+            int i = start + offset;
+            if (i >= list.length) {
+                i -= list.length;
+            }
+            int oldCount = list[i];
+            return oldCount != 0 && oldCount <= count;
+        }
+
+        /**
+         * Finds the lowest stored offset from a non-empty list, removes it,
+         * and reduces all other offsets by this minimum.
+         * @return min=[1..maxLength]
+         */
+        public int popMinimum(OutputInt outCount) {
+            // Look for the next offset in list[start+1..list.length-1].
+            int i = start, result;
+            while (++i < list.length) {
+                int count = list[i];
+                if (count != 0) {
+                    list[i] = 0;
+                    --length;
+                    result = i - start;
+                    start = i;
+                    if (outCount != null) { outCount.value = count; }
+                    return result;
+                }
+            }
+            // i==list.length
+
+            // Wrap around and look for the next offset in list[0..start].
+            // Since the list is not empty, there will be one.
+            result = list.length - start;
+            i = 0;
+            int count;
+            while ((count = list[i]) == 0) {
+                ++i;
+            }
+            list[i] = 0;
+            --length;
+            start = i;
+            if (outCount != null) { outCount.value = count; }
+            return result + i;
+        }
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/icu/impl/Utility.class b/tests/test_data/std/jdk/internal/icu/impl/Utility.class
new file mode 100644
index 0000000000000000000000000000000000000000..6fedabcc12b837d76986a944e9b4e9ec8dd5e362
GIT binary patch
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diff --git a/tests/test_data/std/jdk/internal/icu/impl/Utility.java b/tests/test_data/std/jdk/internal/icu/impl/Utility.java
new file mode 100644
index 00000000..62c6c5a7
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/icu/impl/Utility.java
@@ -0,0 +1,276 @@
+/*
+ * Copyright (c) 2005, 2022, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+/*
+ *******************************************************************************
+ * Copyright (C) 1996-2015, International Business Machines Corporation and    *
+ * others. All Rights Reserved.                                                *
+ *******************************************************************************
+ */
+
+package jdk.internal.icu.impl;
+
+import jdk.internal.icu.lang.UCharacter;
+import jdk.internal.icu.text.UTF16;
+
+import java.io.IOException;
+import java.util.Locale;
+
+public final class Utility {
+
+    /**
+     * Convert characters outside the range U+0020 to U+007F to
+     * Unicode escapes, and convert backslash to a double backslash.
+     */
+    public static final String escape(String s) {
+        StringBuilder buf = new StringBuilder();
+        for (int i=0; i<s.length(); ) {
+            int c = Character.codePointAt(s, i);
+            i += UTF16.getCharCount(c);
+            if (c >= ' ' && c <= 0x007F) {
+                if (c == '\\') {
+                    buf.append("\\\\"); // That is, "\\"
+                } else {
+                    buf.append((char)c);
+                }
+            } else {
+                boolean four = c <= 0xFFFF;
+                buf.append(four ? "\\u" : "\\U");
+                buf.append(hex(c, four ? 4 : 8));
+            }
+        }
+        return buf.toString();
+    }
+
+    /* This map must be in ASCENDING ORDER OF THE ESCAPE CODE */
+    private static final char[] UNESCAPE_MAP = {
+        /*"   0x22, 0x22 */
+        /*'   0x27, 0x27 */
+        /*?   0x3F, 0x3F */
+        /*\   0x5C, 0x5C */
+        /*a*/ 0x61, 0x07,
+        /*b*/ 0x62, 0x08,
+        /*e*/ 0x65, 0x1b,
+        /*f*/ 0x66, 0x0c,
+        /*n*/ 0x6E, 0x0a,
+        /*r*/ 0x72, 0x0d,
+        /*t*/ 0x74, 0x09,
+        /*v*/ 0x76, 0x0b
+    };
+
+    /**
+     * Convert an escape to a 32-bit code point value.  We attempt
+     * to parallel the icu4c unescapeAt() function.
+     * @param offset16 an array containing offset to the character
+     * <em>after</em> the backslash.  Upon return offset16[0] will
+     * be updated to point after the escape sequence.
+     * @return character value from 0 to 10FFFF, or -1 on error.
+     */
+    public static int unescapeAt(String s, int[] offset16) {
+        int c;
+        int result = 0;
+        int n = 0;
+        int minDig = 0;
+        int maxDig = 0;
+        int bitsPerDigit = 4;
+        int dig;
+        int i;
+        boolean braces = false;
+
+        /* Check that offset is in range */
+        int offset = offset16[0];
+        int length = s.length();
+        if (offset < 0 || offset >= length) {
+            return -1;
+        }
+
+        /* Fetch first UChar after '\\' */
+        c = Character.codePointAt(s, offset);
+        offset += UTF16.getCharCount(c);
+
+        /* Convert hexadecimal and octal escapes */
+        switch (c) {
+        case 'u':
+            minDig = maxDig = 4;
+            break;
+        case 'U':
+            minDig = maxDig = 8;
+            break;
+        case 'x':
+            minDig = 1;
+            if (offset < length && UTF16.charAt(s, offset) == 0x7B /*{*/) {
+                ++offset;
+                braces = true;
+                maxDig = 8;
+            } else {
+                maxDig = 2;
+          }
+            break;
+        default:
+            dig = UCharacter.digit(c, 8);
+            if (dig >= 0) {
+                minDig = 1;
+                maxDig = 3;
+                n = 1; /* Already have first octal digit */
+                bitsPerDigit = 3;
+                result = dig;
+            }
+            break;
+        }
+        if (minDig != 0) {
+            while (offset < length && n < maxDig) {
+                c = UTF16.charAt(s, offset);
+                dig = UCharacter.digit(c, (bitsPerDigit == 3) ? 8 : 16);
+                if (dig < 0) {
+                    break;
+                }
+                result = (result << bitsPerDigit) | dig;
+                offset += UTF16.getCharCount(c);
+                ++n;
+            }
+            if (n < minDig) {
+                return -1;
+            }
+            if (braces) {
+                if (c != 0x7D /*}*/) {
+                    return -1;
+                }
+                ++offset;
+          }
+            if (result < 0 || result >= 0x110000) {
+                return -1;
+            }
+            // If an escape sequence specifies a lead surrogate, see
+            // if there is a trail surrogate after it, either as an
+            // escape or as a literal.  If so, join them up into a
+            // supplementary.
+            if (offset < length &&
+                    UTF16.isLeadSurrogate((char) result)) {
+                int ahead = offset+1;
+                c = s.charAt(offset); // [sic] get 16-bit code unit
+                if (c == '\\' && ahead < length) {
+                    int o[] = new int[] { ahead };
+                    c = unescapeAt(s, o);
+                    ahead = o[0];
+                }
+                if (UTF16.isTrailSurrogate((char) c)) {
+                    offset = ahead;
+                    result = UCharacterProperty.getRawSupplementary(
+                            (char) result, (char) c);
+                }
+            }
+            offset16[0] = offset;
+            return result;
+        }
+
+        /* Convert C-style escapes in table */
+        for (i=0; i<UNESCAPE_MAP.length; i+=2) {
+            if (c == UNESCAPE_MAP[i]) {
+                offset16[0] = offset;
+                return UNESCAPE_MAP[i+1];
+            } else if (c < UNESCAPE_MAP[i]) {
+                break;
+            }
+        }
+
+        /* Map \cX to control-X: X & 0x1F */
+        if (c == 'c' && offset < length) {
+            c = UTF16.charAt(s, offset);
+            offset16[0] = offset + UTF16.getCharCount(c);
+            return 0x1F & c;
+        }
+
+        /* If no special forms are recognized, then consider
+         * the backslash to generically escape the next character. */
+        offset16[0] = offset;
+        return c;
+    }
+
+    /**
+     * Supplies a zero-padded hex representation of an integer (without 0x)
+     */
+    public static String hex(long i, int places) {
+        if (i == Long.MIN_VALUE) return "-8000000000000000";
+        boolean negative = i < 0;
+        if (negative) {
+            i = -i;
+        }
+        String result = Long.toString(i, 16).toUpperCase(Locale.ENGLISH);
+        if (result.length() < places) {
+            result = "0000000000000000".substring(result.length(),places) + result;
+        }
+        if (negative) {
+            return '-' + result;
+        }
+        return result;
+    }
+
+    static final char DIGITS[] = {
+        '0', '1', '2', '3', '4', '5', '6', '7', '8', '9',
+        'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J',
+        'K', 'L', 'M', 'N', 'O', 'P', 'Q', 'R', 'S', 'T',
+        'U', 'V', 'W', 'X', 'Y', 'Z'
+    };
+
+    /**
+     * Return true if the character is NOT printable ASCII.  The tab,
+     * newline and linefeed characters are considered unprintable.
+     */
+    public static boolean isUnprintable(int c) {
+        //0x20 = 32 and 0x7E = 126
+        return !(c >= 0x20 && c <= 0x7E);
+    }
+
+    /**
+     * Escape unprintable characters using <backslash>uxxxx notation
+     * for U+0000 to U+FFFF and <backslash>Uxxxxxxxx for U+10000 and
+     * above.  If the character is printable ASCII, then do nothing
+     * and return false.  Otherwise, append the escaped notation and
+     * return true.
+     */
+    public static <T extends Appendable> boolean escapeUnprintable(T result, int c) {
+        try {
+            if (isUnprintable(c)) {
+                result.append('\\');
+                if ((c & ~0xFFFF) != 0) {
+                    result.append('U');
+                    result.append(DIGITS[0xF&(c>>28)]);
+                    result.append(DIGITS[0xF&(c>>24)]);
+                    result.append(DIGITS[0xF&(c>>20)]);
+                    result.append(DIGITS[0xF&(c>>16)]);
+                } else {
+                    result.append('u');
+                }
+                result.append(DIGITS[0xF&(c>>12)]);
+                result.append(DIGITS[0xF&(c>>8)]);
+                result.append(DIGITS[0xF&(c>>4)]);
+                result.append(DIGITS[0xF&c]);
+                return true;
+            }
+            return false;
+        } catch (IOException e) {
+            throw new IllegalArgumentException(e);
+        }
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/icu/impl/data/icudt74b/nfc.nrm b/tests/test_data/std/jdk/internal/icu/impl/data/icudt74b/nfc.nrm
new file mode 100644
index 0000000000000000000000000000000000000000..9228eebbd170eed49290c974311d494f4ea22ec0
GIT binary patch
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literal 0
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diff --git a/tests/test_data/std/jdk/internal/icu/impl/data/icudt74b/nfkc.nrm b/tests/test_data/std/jdk/internal/icu/impl/data/icudt74b/nfkc.nrm
new file mode 100644
index 0000000000000000000000000000000000000000..001a2c5ca752432d046317e53d334b28d09ff907
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diff --git a/tests/test_data/std/jdk/internal/icu/impl/data/icudt74b/ubidi.icu b/tests/test_data/std/jdk/internal/icu/impl/data/icudt74b/ubidi.icu
new file mode 100644
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diff --git a/tests/test_data/std/jdk/internal/icu/impl/data/icudt74b/uprops.icu b/tests/test_data/std/jdk/internal/icu/impl/data/icudt74b/uprops.icu
new file mode 100644
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diff --git a/tests/test_data/std/jdk/internal/icu/lang/UCharacter$HangulSyllableType.class b/tests/test_data/std/jdk/internal/icu/lang/UCharacter$HangulSyllableType.class
new file mode 100644
index 0000000000000000000000000000000000000000..682f3d4d4f036f695ebfb4c905740dca1f195940
GIT binary patch
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diff --git a/tests/test_data/std/jdk/internal/icu/lang/UCharacter$JoiningGroup.class b/tests/test_data/std/jdk/internal/icu/lang/UCharacter$JoiningGroup.class
new file mode 100644
index 0000000000000000000000000000000000000000..7c1789d8a3a66462f3980de53f3af10c6993684a
GIT binary patch
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diff --git a/tests/test_data/std/jdk/internal/icu/lang/UCharacter$NumericType.class b/tests/test_data/std/jdk/internal/icu/lang/UCharacter$NumericType.class
new file mode 100644
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GIT binary patch
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diff --git a/tests/test_data/std/jdk/internal/icu/lang/UCharacter.class b/tests/test_data/std/jdk/internal/icu/lang/UCharacter.class
new file mode 100644
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GIT binary patch
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diff --git a/tests/test_data/std/jdk/internal/icu/lang/UCharacter.java b/tests/test_data/std/jdk/internal/icu/lang/UCharacter.java
new file mode 100644
index 00000000..cd87db30
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/icu/lang/UCharacter.java
@@ -0,0 +1,545 @@
+/*
+ * Copyright (c) 2009, 2023, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/*
+*******************************************************************************
+* Copyright (C) 1996-2014, International Business Machines Corporation and
+* others. All Rights Reserved.
+*******************************************************************************
+*/
+
+package jdk.internal.icu.lang;
+
+import jdk.internal.icu.impl.UBiDiProps;
+import jdk.internal.icu.impl.UCharacterProperty;
+import jdk.internal.icu.text.Normalizer2;
+import jdk.internal.icu.text.UTF16;
+import jdk.internal.icu.util.VersionInfo;
+
+/**
+ * <p>The UCharacter class provides extensions to the
+ * <a href="http://java.sun.com/j2se/1.5/docs/api/java/lang/Character.html">
+ * java.lang.Character</a> class. These extensions provide support for
+ * more Unicode properties and together with the <a href=../text/UTF16.html>UTF16</a>
+ * class, provide support for supplementary characters (those with code
+ * points above U+FFFF).
+ * Each ICU release supports the latest version of Unicode available at that time.
+ *
+ * <p>Code points are represented in these API using ints. While it would be
+ * more convenient in Java to have a separate primitive datatype for them,
+ * ints suffice in the meantime.
+ *
+ * <p>To use this class please add the jar file name icu4j.jar to the
+ * class path, since it contains data files which supply the information used
+ * by this file.<br>
+ * E.g. In Windows <br>
+ * <code>set CLASSPATH=%CLASSPATH%;$JAR_FILE_PATH/ucharacter.jar</code>.<br>
+ * Otherwise, another method would be to copy the files uprops.dat and
+ * unames.icu from the icu4j source subdirectory
+ * <i>$ICU4J_SRC/src/com.ibm.icu.impl.data</i> to your class directory
+ * <i>$ICU4J_CLASS/com.ibm.icu.impl.data</i>.
+ *
+ * <p>Aside from the additions for UTF-16 support, and the updated Unicode
+ * properties, the main differences between UCharacter and Character are:
+ * <ul>
+ * <li> UCharacter is not designed to be a char wrapper and does not have
+ *      APIs to which involves management of that single char.<br>
+ *      These include:
+ *      <ul>
+ *        <li> char charValue(),
+ *        <li> int compareTo(java.lang.Character, java.lang.Character), etc.
+ *      </ul>
+ * <li> UCharacter does not include Character APIs that are deprecated, nor
+ *      does it include the Java-specific character information, such as
+ *      boolean isJavaIdentifierPart(char ch).
+ * <li> Character maps characters 'A' - 'Z' and 'a' - 'z' to the numeric
+ *      values '10' - '35'. UCharacter also does this in digit and
+ *      getNumericValue, to adhere to the java semantics of these
+ *      methods.  New methods unicodeDigit, and
+ *      getUnicodeNumericValue do not treat the above code points
+ *      as having numeric values.  This is a semantic change from ICU4J 1.3.1.
+ * </ul>
+ * <p>
+ * Further detail on differences can be determined using the program
+ *        <a href=
+ * "https://github.com/unicode-org/icu/blob/main/icu4j/main/core/src/test/java/com/ibm/icu/dev/test/lang/UCharacterCompare.java">
+ *        com.ibm.icu.dev.test.lang.UCharacterCompare</a>
+ * </p>
+ * <p>
+ * In addition to Java compatibility functions, which calculate derived properties,
+ * this API provides low-level access to the Unicode Character Database.
+ * </p>
+ * <p>
+ * Unicode assigns each code point (not just assigned character) values for
+ * many properties.
+ * Most of them are simple boolean flags, or constants from a small enumerated list.
+ * For some properties, values are strings or other relatively more complex types.
+ * </p>
+ * <p>
+ * For more information see
+ * <a href="http://www.unicode/org/ucd/">"About the Unicode Character Database"</a>
+ * (http://www.unicode.org/ucd/)
+ * and the <a href="https://unicode-org.github.io/icu/userguide/strings/properties">ICU
+ * User Guide chapter on Properties</a>
+ * (https://unicode-org.github.io/icu/userguide/strings/properties).
+ * </p>
+ * <p>
+ * There are also functions that provide easy migration from C/POSIX functions
+ * like isblank(). Their use is generally discouraged because the C/POSIX
+ * standards do not define their semantics beyond the ASCII range, which means
+ * that different implementations exhibit very different behavior.
+ * Instead, Unicode properties should be used directly.
+ * </p>
+ * <p>
+ * There are also only a few, broad C/POSIX character classes, and they tend
+ * to be used for conflicting purposes. For example, the "isalpha()" class
+ * is sometimes used to determine word boundaries, while a more sophisticated
+ * approach would at least distinguish initial letters from continuation
+ * characters (the latter including combining marks).
+ * (In ICU, BreakIterator is the most sophisticated API for word boundaries.)
+ * Another example: There is no "istitle()" class for titlecase characters.
+ * </p>
+ * <p>
+ * ICU 3.4 and later provides API access for all twelve C/POSIX character classes.
+ * ICU implements them according to the Standard Recommendations in
+ * Annex C: Compatibility Properties of UTS #18 Unicode Regular Expressions
+ * (http://www.unicode.org/reports/tr18/#Compatibility_Properties).
+ * </p>
+ * <p>
+ * API access for C/POSIX character classes is as follows:
+ * <pre>{@code
+ * - alpha:     isUAlphabetic(c) or hasBinaryProperty(c, UProperty.ALPHABETIC)
+ * - lower:     isULowercase(c) or hasBinaryProperty(c, UProperty.LOWERCASE)
+ * - upper:     isUUppercase(c) or hasBinaryProperty(c, UProperty.UPPERCASE)
+ * - punct:     ((1<<getType(c)) & ((1<<DASH_PUNCTUATION)|(1<<START_PUNCTUATION)|
+ *               (1<<END_PUNCTUATION)|(1<<CONNECTOR_PUNCTUATION)|(1<<OTHER_PUNCTUATION)|
+ *               (1<<INITIAL_PUNCTUATION)|(1<<FINAL_PUNCTUATION)))!=0
+ * - digit:     isDigit(c) or getType(c)==DECIMAL_DIGIT_NUMBER
+ * - xdigit:    hasBinaryProperty(c, UProperty.POSIX_XDIGIT)
+ * - alnum:     hasBinaryProperty(c, UProperty.POSIX_ALNUM)
+ * - space:     isUWhiteSpace(c) or hasBinaryProperty(c, UProperty.WHITE_SPACE)
+ * - blank:     hasBinaryProperty(c, UProperty.POSIX_BLANK)
+ * - cntrl:     getType(c)==CONTROL
+ * - graph:     hasBinaryProperty(c, UProperty.POSIX_GRAPH)
+ * - print:     hasBinaryProperty(c, UProperty.POSIX_PRINT)
+ * }</pre>
+ * </p>
+ * <p>
+ * The C/POSIX character classes are also available in UnicodeSet patterns,
+ * using patterns like [:graph:] or \p{graph}.
+ * </p>
+ *
+ * There are several ICU (and Java) whitespace functions.
+ * Comparison:<ul>
+ * <li> isUWhiteSpace=UCHAR_WHITE_SPACE: Unicode White_Space property;
+ *       most of general categories "Z" (separators) + most whitespace ISO controls
+ *       (including no-break spaces, but excluding IS1..IS4 and ZWSP)
+ * <li> isWhitespace: Java isWhitespace; Z + whitespace ISO controls but excluding no-break spaces
+ * <li> isSpaceChar: just Z (including no-break spaces)</ul>
+ * </p>
+ * <p>
+ * This class is not subclassable.
+ * </p>
+ * @author Syn Wee Quek
+ * @stable ICU 2.1
+ * @see com.ibm.icu.lang.UCharacterEnums
+ */
+
+public final class UCharacter
+{
+
+    /**
+     * Joining Group constants.
+     * @see UProperty#JOINING_GROUP
+     * @stable ICU 2.4
+     */
+    public static interface JoiningGroup
+    {
+        /**
+         * @stable ICU 2.4
+         */
+        public static final int NO_JOINING_GROUP = 0;
+    }
+
+    /**
+     * Numeric Type constants.
+     * @see UProperty#NUMERIC_TYPE
+     * @stable ICU 2.4
+     */
+    public static interface NumericType
+    {
+        /**
+         * @stable ICU 2.4
+         */
+        public static final int NONE = 0;
+        /**
+         * @stable ICU 2.4
+         */
+        public static final int DECIMAL = 1;
+        /**
+         * @stable ICU 2.4
+         */
+        public static final int DIGIT = 2;
+        /**
+         * @stable ICU 2.4
+         */
+        public static final int NUMERIC = 3;
+        /**
+         * @stable ICU 2.4
+         */
+        public static final int COUNT = 4;
+    }
+
+    /**
+     * Hangul Syllable Type constants.
+     *
+     * @see UProperty#HANGUL_SYLLABLE_TYPE
+     * @stable ICU 2.6
+     */
+    public static interface HangulSyllableType
+    {
+        /**
+         * @stable ICU 2.6
+         */
+        public static final int NOT_APPLICABLE      = 0;   /*[NA]*/ /*See note !!*/
+        /**
+         * @stable ICU 2.6
+         */
+        public static final int LEADING_JAMO        = 1;   /*[L]*/
+        /**
+         * @stable ICU 2.6
+         */
+        public static final int VOWEL_JAMO          = 2;   /*[V]*/
+        /**
+         * @stable ICU 2.6
+         */
+        public static final int TRAILING_JAMO       = 3;   /*[T]*/
+        /**
+         * @stable ICU 2.6
+         */
+        public static final int LV_SYLLABLE         = 4;   /*[LV]*/
+        /**
+         * @stable ICU 2.6
+         */
+        public static final int LVT_SYLLABLE        = 5;   /*[LVT]*/
+        /**
+         * @stable ICU 2.6
+         */
+        public static final int COUNT               = 6;
+    }
+
+    // public data members -----------------------------------------------
+
+    /**
+     * The lowest Unicode code point value.
+     * @stable ICU 2.1
+     */
+    public static final int MIN_VALUE = UTF16.CODEPOINT_MIN_VALUE;
+
+    /**
+     * The highest Unicode code point value (scalar value) according to the
+     * Unicode Standard.
+     * This is a 21-bit value (21 bits, rounded up).<br>
+     * Up-to-date Unicode implementation of java.lang.Character.MAX_VALUE
+     * @stable ICU 2.1
+     */
+    public static final int MAX_VALUE = UTF16.CODEPOINT_MAX_VALUE;
+
+    // public methods ----------------------------------------------------
+
+    /**
+     * Returns the numeric value of a decimal digit code point.
+     * <br>This method observes the semantics of
+     * <code>java.lang.Character.digit()</code>.  Note that this
+     * will return positive values for code points for which isDigit
+     * returns false, just like java.lang.Character.
+     * <br><em>Semantic Change:</em> In release 1.3.1 and
+     * prior, this did not treat the European letters as having a
+     * digit value, and also treated numeric letters and other numbers as
+     * digits.
+     * This has been changed to conform to the java semantics.
+     * <br>A code point is a valid digit if and only if:
+     * <ul>
+     *   <li>ch is a decimal digit or one of the european letters, and
+     *   <li>the value of ch is less than the specified radix.
+     * </ul>
+     * @param ch the code point to query
+     * @param radix the radix
+     * @return the numeric value represented by the code point in the
+     * specified radix, or -1 if the code point is not a decimal digit
+     * or if its value is too large for the radix
+     * @stable ICU 2.1
+     */
+    public static int digit(int ch, int radix)
+    {
+        if (2 <= radix && radix <= 36) {
+            int value = digit(ch);
+            if (value < 0) {
+                // ch is not a decimal digit, try latin letters
+                value = UCharacterProperty.getEuropeanDigit(ch);
+            }
+            return (value < radix) ? value : -1;
+        } else {
+            return -1;  // invalid radix
+        }
+    }
+
+    /**
+     * Returns the numeric value of a decimal digit code point.
+     * <br>This is a convenience overload of <code>digit(int, int)</code>
+     * that provides a decimal radix.
+     * <br><em>Semantic Change:</em> In release 1.3.1 and prior, this
+     * treated numeric letters and other numbers as digits.  This has
+     * been changed to conform to the java semantics.
+     * @param ch the code point to query
+     * @return the numeric value represented by the code point,
+     * or -1 if the code point is not a decimal digit or if its
+     * value is too large for a decimal radix
+     * @stable ICU 2.1
+     */
+    public static int digit(int ch)
+    {
+        return UCharacterProperty.INSTANCE.digit(ch);
+    }
+
+    /**
+     * Returns a value indicating a code point's Unicode category.
+     * Up-to-date Unicode implementation of java.lang.Character.getType()
+     * except for the above mentioned code points that had their category
+     * changed.<br>
+     * Return results are constants from the interface
+     * <a href=UCharacterCategory.html>UCharacterCategory</a><br>
+     * <em>NOTE:</em> the UCharacterCategory values are <em>not</em> compatible with
+     * those returned by java.lang.Character.getType.  UCharacterCategory values
+     * match the ones used in ICU4C, while java.lang.Character type
+     * values, though similar, skip the value 17.</p>
+     * @param ch code point whose type is to be determined
+     * @return category which is a value of UCharacterCategory
+     * @stable ICU 2.1
+     */
+    public static int getType(int ch)
+    {
+        return UCharacterProperty.INSTANCE.getType(ch);
+    }
+
+    /**
+     * Returns the Bidirection property of a code point.
+     * For example, 0x0041 (letter A) has the LEFT_TO_RIGHT directional
+     * property.<br>
+     * Result returned belongs to the interface
+     * <a href=UCharacterDirection.html>UCharacterDirection</a>
+     * @param ch the code point to be determined its direction
+     * @return direction constant from UCharacterDirection.
+     * @stable ICU 2.1
+     */
+    public static int getDirection(int ch)
+    {
+        return UBiDiProps.INSTANCE.getClass(ch);
+    }
+
+    /**
+     * Maps the specified code point to a "mirror-image" code point.
+     * For code points with the "mirrored" property, implementations sometimes
+     * need a "poor man's" mapping to another code point such that the default
+     * glyph may serve as the mirror-image of the default glyph of the
+     * specified code point.<br>
+     * This is useful for text conversion to and from codepages with visual
+     * order, and for displays without glyph selection capabilities.
+     * @param ch code point whose mirror is to be retrieved
+     * @return another code point that may serve as a mirror-image substitute,
+     *         or ch itself if there is no such mapping or ch does not have the
+     *         "mirrored" property
+     * @stable ICU 2.1
+     */
+    public static int getMirror(int ch)
+    {
+        return UBiDiProps.INSTANCE.getMirror(ch);
+    }
+
+    /**
+     * Maps the specified character to its paired bracket character.
+     * For Bidi_Paired_Bracket_Type!=None, this is the same as getMirror(int).
+     * Otherwise c itself is returned.
+     * See http://www.unicode.org/reports/tr9/
+     *
+     * @param c the code point to be mapped
+     * @return the paired bracket code point,
+     *         or c itself if there is no such mapping
+     *         (Bidi_Paired_Bracket_Type=None)
+     *
+     * @see UProperty#BIDI_PAIRED_BRACKET
+     * @see UProperty#BIDI_PAIRED_BRACKET_TYPE
+     * @see #getMirror(int)
+     * @stable ICU 52
+     */
+    public static int getBidiPairedBracket(int c) {
+        return UBiDiProps.INSTANCE.getPairedBracket(c);
+    }
+
+    /**
+     * Returns the combining class of the argument codepoint
+     * @param ch code point whose combining is to be retrieved
+     * @return the combining class of the codepoint
+     * @stable ICU 2.1
+     */
+    public static int getCombiningClass(int ch)
+    {
+        return Normalizer2.getNFDInstance().getCombiningClass(ch);
+    }
+
+    /**
+     * Returns the version of Unicode data used.
+     * @return the unicode version number used
+     * @stable ICU 2.1
+     */
+    public static VersionInfo getUnicodeVersion()
+    {
+        return UCharacterProperty.INSTANCE.m_unicodeVersion_;
+    }
+
+    /**
+     * Returns a code point corresponding to the two UTF16 characters.
+     * @param lead the lead char
+     * @param trail the trail char
+     * @return code point if surrogate characters are valid.
+     * @exception IllegalArgumentException thrown when argument characters do
+     *            not form a valid codepoint
+     * @stable ICU 2.1
+     */
+    public static int getCodePoint(char lead, char trail)
+    {
+        if (UTF16.isLeadSurrogate(lead) && UTF16.isTrailSurrogate(trail)) {
+            return UCharacterProperty.getRawSupplementary(lead, trail);
+        }
+        throw new IllegalArgumentException("Illegal surrogate characters");
+    }
+
+    /**
+     * Returns the "age" of the code point.</p>
+     * <p>The "age" is the Unicode version when the code point was first
+     * designated (as a non-character or for Private Use) or assigned a
+     * character.
+     * <p>This can be useful to avoid emitting code points to receiving
+     * processes that do not accept newer characters.</p>
+     * <p>The data is from the UCD file DerivedAge.txt.</p>
+     * @param ch The code point.
+     * @return the Unicode version number
+     * @stable ICU 2.6
+     */
+    public static VersionInfo getAge(int ch)
+    {
+        if (ch < MIN_VALUE || ch > MAX_VALUE) {
+            throw new IllegalArgumentException("Codepoint out of bounds");
+        }
+        return UCharacterProperty.INSTANCE.getAge(ch);
+    }
+
+    /**
+     * Returns the property value for an Unicode property type of a code point.
+     * Also returns binary and mask property values.</p>
+     * <p>Unicode, especially in version 3.2, defines many more properties than
+     * the original set in UnicodeData.txt.</p>
+     * <p>The properties APIs are intended to reflect Unicode properties as
+     * defined in the Unicode Character Database (UCD) and Unicode Technical
+     * Reports (UTR). For details about the properties see
+     * http://www.unicode.org/.</p>
+     * <p>For names of Unicode properties see the UCD file PropertyAliases.txt.
+     * </p>
+     * <pre>
+     * Sample usage:
+     * int ea = UCharacter.getIntPropertyValue(c, UProperty.EAST_ASIAN_WIDTH);
+     * int ideo = UCharacter.getIntPropertyValue(c, UProperty.IDEOGRAPHIC);
+     * boolean b = (ideo == 1) ? true : false;
+     * </pre>
+     * @param ch code point to test.
+     * @param type UProperty selector constant, identifies which binary
+     *        property to check. Must be
+     *        UProperty.BINARY_START &lt;= type &lt; UProperty.BINARY_LIMIT or
+     *        UProperty.INT_START &lt;= type &lt; UProperty.INT_LIMIT or
+     *        UProperty.MASK_START &lt;= type &lt; UProperty.MASK_LIMIT.
+     * @return numeric value that is directly the property value or,
+     *         for enumerated properties, corresponds to the numeric value of
+     *         the enumerated constant of the respective property value
+     *         enumeration type (cast to enum type if necessary).
+     *         Returns 0 or 1 (for false / true) for binary Unicode properties.
+     *         Returns a bit-mask for mask properties.
+     *         Returns 0 if 'type' is out of bounds or if the Unicode version
+     *         does not have data for the property at all, or not for this code
+     *         point.
+     * @see UProperty
+     * @see #hasBinaryProperty
+     * @see #getIntPropertyMinValue
+     * @see #getIntPropertyMaxValue
+     * @see #getUnicodeVersion
+     * @stable ICU 2.4
+     */
+     // for BiDiBase.java
+    public static int getIntPropertyValue(int ch, int type) {
+        return UCharacterProperty.INSTANCE.getIntPropertyValue(ch, type);
+    }
+
+    // private constructor -----------------------------------------------
+
+    /**
+     * Private constructor to prevent instantiation
+     */
+    private UCharacter() { }
+
+      /*
+       * Copied from UCharacterEnums.java
+       */
+
+        /**
+         * Character type Mn
+         * @stable ICU 2.1
+         */
+        public static final byte NON_SPACING_MARK        = 6;
+        /**
+         * Character type Me
+         * @stable ICU 2.1
+         */
+        public static final byte ENCLOSING_MARK          = 7;
+        /**
+         * Character type Mc
+         * @stable ICU 2.1
+         */
+        public static final byte COMBINING_SPACING_MARK  = 8;
+        /**
+         * Character type count
+         * @stable ICU 2.1
+         */
+        public static final byte CHAR_CATEGORY_COUNT     = 30;
+
+        /**
+         * Directional type R
+         * @stable ICU 2.1
+         */
+        public static final int RIGHT_TO_LEFT              = 1;
+        /**
+         * Directional type AL
+         * @stable ICU 2.1
+         */
+        public static final int RIGHT_TO_LEFT_ARABIC       = 13;
+}
diff --git a/tests/test_data/std/jdk/internal/icu/lang/UCharacterDirection.class b/tests/test_data/std/jdk/internal/icu/lang/UCharacterDirection.class
new file mode 100644
index 0000000000000000000000000000000000000000..38101b415b553fa50cd0cde71eb31472fd588772
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zZ24NT0D}UXCz~#*Yh}aPX04=MfK38B-*ARST~|(}3By|iM&Ary(XM7}J1&{#tWzZu
ztuYP>?8qmzTJkDMC*O8~Z5K&icB)?K42%eDE$VVj+qBa?Dv-TeF{y6URip#FFR*DY
zt!Nj{>SpRxwGm)96LxhUPO`T+Hntof6xiM!oLkn;nV4iB2@G{<6t-Ilu#c48kq*iO
zr0fp9rW|AJVp0#!8^<4I6054=RN`ui`XA!2oK5URk*%<{a7MYM03XwPE@|3Wx!bRr
z3UGvd&s)`Kn6lMz21f<P7vrUzv8i?>&6%j#9*OyUg?dJGujS0(6M+-!ZJ)HwT4Uej
z+s6g^@=2^YEd^tBdr+>ZQk5QANFr5TP|md0tIoc(Vj2R63+rWEEAXU1kS4{{Q3iqG
zvFY)`>ltsmxurKYPC!g^#EPkkmS$9aHDk7zG+m^pOsl4mcPMbAMJF&gZLN0sDs|M2
z49*JdU$4d$RXC*Y&;`ek<INPbpzUehPOgq~b(~hvZaDN5;>k+*Q@&dl890ePoWf`P
z8f<UE=lFuF0ep!QZ31z0mEh6nV@7~~R^EW5y-wUB6cH0;Vv(p3b)rEm6Ss*UiJytP
z#IMBf#C_r~;%}Mpa=^>?yxi#JW-qsTxy{RAFL!vk)5~36e&FREFF*8hub2D1Jm}@P
zmxsNa@I2p(R!<8U=6eb^FpY0<0VT{pV-6Ku!V-$Gn8)|HiWJxI18cv7oA`-4e_{Ri
z5aBoO{)0XI34;eb@sNG|i=;!JNBD}Gftmp$7<z#lJ#Rl$_G`v_a2jW5v()bxzQMWv
Gf&T$amr;KJ

literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/icu/lang/UCharacterDirection.java b/tests/test_data/std/jdk/internal/icu/lang/UCharacterDirection.java
new file mode 100644
index 00000000..ef995893
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/icu/lang/UCharacterDirection.java
@@ -0,0 +1,113 @@
+/*
+ * Copyright (c) 2005, 2022, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+/*
+/**
+*******************************************************************************
+* Copyright (C) 1996-2004, International Business Machines Corporation and    *
+* others. All Rights Reserved.                                                *
+*******************************************************************************
+*/
+// CHANGELOG
+//      2005-05-19 Edward Wang
+//          - copy this file from icu4jsrc_3_2/src/com/ibm/icu/lang/UCharacterDirection.java
+//          - move from package com.ibm.icu.lang to package sun.net.idn
+//
+
+package jdk.internal.icu.lang;
+
+/**
+ * Enumerated Unicode character linguistic direction constants.
+ * Used as return results from <a href=UCharacter.html>UCharacter</a>
+ * <p>
+ * This class is not subclassable
+ * </p>
+ * @author Syn Wee Quek
+ * @stable ICU 2.1
+ */
+
+@SuppressWarnings("deprecation")
+public final class UCharacterDirection implements UCharacterEnums.ECharacterDirection {
+
+    // private constructor =========================================
+    // CLOVER:OFF
+    /**
+     * Private constructor to prevent initialization
+     */
+    private UCharacterDirection()
+    {
+    }
+    // CLOVER:ON
+
+    /**
+     * Gets the name of the argument direction
+     * @param dir direction type to retrieve name
+     * @return directional name
+     * @stable ICU 2.1
+     */
+    public static String toString(int dir) {
+        switch(dir)
+            {
+            case LEFT_TO_RIGHT :
+                return "Left-to-Right";
+            case RIGHT_TO_LEFT :
+                return "Right-to-Left";
+            case EUROPEAN_NUMBER :
+                return "European Number";
+            case EUROPEAN_NUMBER_SEPARATOR :
+                return "European Number Separator";
+            case EUROPEAN_NUMBER_TERMINATOR :
+                return "European Number Terminator";
+            case ARABIC_NUMBER :
+                return "Arabic Number";
+            case COMMON_NUMBER_SEPARATOR :
+                return "Common Number Separator";
+            case BLOCK_SEPARATOR :
+                return "Paragraph Separator";
+            case SEGMENT_SEPARATOR :
+                return "Segment Separator";
+            case WHITE_SPACE_NEUTRAL :
+                return "Whitespace";
+            case OTHER_NEUTRAL :
+                return "Other Neutrals";
+            case LEFT_TO_RIGHT_EMBEDDING :
+                return "Left-to-Right Embedding";
+            case LEFT_TO_RIGHT_OVERRIDE :
+                return "Left-to-Right Override";
+            case RIGHT_TO_LEFT_ARABIC :
+                return "Right-to-Left Arabic";
+            case RIGHT_TO_LEFT_EMBEDDING :
+                return "Right-to-Left Embedding";
+            case RIGHT_TO_LEFT_OVERRIDE :
+                return "Right-to-Left Override";
+            case POP_DIRECTIONAL_FORMAT :
+                return "Pop Directional Format";
+            case DIR_NON_SPACING_MARK :
+                return "Non-Spacing Mark";
+            case BOUNDARY_NEUTRAL :
+                return "Boundary Neutral";
+            }
+        return "Unassigned";
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/icu/lang/UCharacterEnums$ECharacterCategory.class b/tests/test_data/std/jdk/internal/icu/lang/UCharacterEnums$ECharacterCategory.class
new file mode 100644
index 0000000000000000000000000000000000000000..97b1e3665ee774207a7b0e8541b35887d47626f6
GIT binary patch
literal 1731
zcma)-*>W326oyaR*z&$FQ8pkX>_qGY!q#rJMomWDlUYppYHFfP1sP>TNh7LwH7<An
z9*W{03#`M~7pTfoeSe?*beI49>-Rs1NKx3J1woI_pa0w%6lFdxvSDk`pSFfs@uHQe
zpR#e*hpda~%gKFx$to-J7o+iS4SGe;&UyB0HuG@L&hvgLXf3faii~G<TaYk<Hr1$@
zlvz=pX2WT|h}<M--_ury(obF7)nOW+1v)~wBnWh<WTaDH$FUA8YXRMNKVH#M{7!6Q
zU)Ssx1#S0S+jI;9&%>bFjajm}wuBJY*)$5IGS*9bGJH~{To$yYt@2&O)rO!W<$5Q^
zR%+d6MbJT8E7L<$ZR43ZwMp+}*1{^LFw4rswabF$hU=)k3arye2QrkgyBNU+>hX=O
zshb#MW#ol2=>FGXOHe~O8;8!X`q>t=+;L$~#ue=dS`R{VDr21{k*=g&L90;`hR%an
z3454KTSnb9NUVwz85?ISeP7US6w5HK9~_`^ZQFJEP|zU?v09;(`r#3R%~n#&a*PU5
zESfs&oy=Oef%pm)Vl8J(Zt`W%t#4k=cCOvRxUjm|U_rHfw*@u-J$jlr%!L`?O1JZ0
z#(5tX|2Yi9X;BVd=BI<n;Mp*jMKLO~a)3LI>*3Ge!`$aF+Uyv6HSHZi$FqZLlJ2Xn
z3{!=DcrH9kl}qf!_U@vdXfz%7^Uh$H<I>fh>cgr8K`S<&l-<#!Y>*T5;D5bx49yfp
zK32nQGRe`;-qmN1ry;1i3HPW;OSBAXfEH*4yjtTm#_KrWV7v+5V!RFBVZ008W4sSO
zV0;KZVtfp~!MF*&$@mudHsd?syNq82zsC4=@IA(FfbTPY0DhD4Ti~}DzXN`k@q6I+
z8GitN$hZamknu<0j~Rag{*>`&;LjO<0e-~zOYm2WAA`SU{0;b9#@~UzXDq=d;KhIT
zEAcO*`n2&^ZC&HHNgd|lfxFDZyVk=nj~@_YiJstlf&6Q%dlx5`0{pHaryxsDmskG=
D+{7Jj

literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/icu/lang/UCharacterEnums$ECharacterDirection.class b/tests/test_data/std/jdk/internal/icu/lang/UCharacterEnums$ECharacterDirection.class
new file mode 100644
index 0000000000000000000000000000000000000000..0da72b14919999b3baa4c560b046f1771b03bee4
GIT binary patch
literal 2642
zcma*n>2lLB5C`y83r$-ny*OHqmZL4@3^$b9v6aL$u``ZShEE<-JdhF`CUJN;KJWlM
z6!2G=;<cj!o#|vG?QbQmC4K+#^&1hH<Q8a5(AM6&kHvPJM7=od6x+LlVkeB>7hC3s
zuov#4TgHP={WbZgZMA#RZqn|?1v(^XZZG^2{wD6*Jq!q%smZb*_-^3Ym8vgD*yuC6
zaX$&;WGCzlqH)Ymg3emDCr#gW9iwLZZ-Trl37WQ|&zLSuqIZIpy+NF`KSew3e*0}F
zGUB+KglZ*yK__eJLQ?YtGY?mxmZQ?EnZ@YLnHWK{vgNrAX*hw?s+Xjv6iT&{TW>B3
z3(WNdP1!I!!*_=n#szKuJwqBV=yX1pFTJ|$>?cF%ulyrf3Qz?sqhy<GKZi%Fkckm=
z%5>{>cfSVd+Eg_r1a0J|KOh>_EY)0dJL?OAF6O+dRK+tI)ihGjd{b8H((%(iHT$HX
z^Eo{dCus3?)%Io3Y#62t9NF?cqo(u}K2%N*BZq+~mFrif$HBCqb2*TSX`)t{vl~d9
z8q2bsikk1pXsr&2R>zp%oxt6Zo@ZN9r8z2SJ+}&du%P3a^BnyCt}4fjpi8+Nx=`#V
z+nw3ZvC;h;5RLt0NBDkbNB5%-MwW)#2-v!Vvg_52;bop1&7u!RRgfWYaG=$P#<vOT
zhPSP%GB0SAWmiv8J`4|C$!$57;bAO2N(-YhABK6&s^O)}4@@K)u6<F^Qf^*MA<MQS
zt?{4u!~56l4tl#$x!sA7DEBDeR8O9uNhj(j)owp2Pz}}iulHQgQ9F*Kp4kce{Rr>p
zqUM3eB^RU$v`Nc!m?qFFpfyI5Xiw2J#`fDs(2paEe-$-@-(@<+#4Or#Ow5u_%rmh7
zvB<=NRvc&I1jI=uPH4p`CYB(UnOM?_(@dN}{8=W>XvH}uRv=cHSka2}Ok9At$ixM$
zxWvR7#5xmeTCu^zWr$5CE^EaVCaywUW8$h-Txa42#7!n{Xho5UTM)OIxTO_$n79jZ
zkBPflai56?5D%GnpcRjp*n)V>#Fkb(Vd5#oGbWyD#d9WJK)ht)g;p3$lpstdN?Ktt
kAtB04R5XHc&#Sn-V`OVaUkyjLsgB=i+;c(O<V;Nc0xRgl$N&HU

literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/icu/lang/UCharacterEnums.class b/tests/test_data/std/jdk/internal/icu/lang/UCharacterEnums.class
new file mode 100644
index 0000000000000000000000000000000000000000..df83468e5fb1604f89a1b700077a188d929c8270
GIT binary patch
literal 631
zcmb7B%TB^T6g^X*m4||WD7tZ>@v*R5jmAU^CMFdVAMA%Rfx$90?bO82a%JMe5AdUm
zcSI#IF0e`Ox%bRHbMDN%y}!Hy@UT{Zg^Yu22|3sdl@Wj7ZphWZz3h!dpc(8VsiZz;
z$ZYR)9n3Loj{0}5R9eJ}hpr6LiQv{7@|Xuiw^ce$7_wf}7Yt=zD$z;DJrUpVUPw&U
zj{+Wcc`Qx+MP~I-l4#4HY4<~h!gZ9!fjE<9%la?(J#!H1X^Hz-1YC<gL-Q(CT8>3m
zCX#$ll!`RhGE!vQ@TVuAYRIM75sAJKX8Odz62rkv^KG<$Zlfh>0%PM~nPLCGa*u`|
zMDZg->0Buhdm&E}K_l1xu%Nr0vfoOq!=Yz3A0woPCd^ai5;DTv?lagEB^C-4%`$L`
vBE{0AfpDIx92O{AD5F9MEYfeftAw@B+(I1<tWaL1zB(B<?L09KR_*);QTL<u

literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/icu/lang/UCharacterEnums.java b/tests/test_data/std/jdk/internal/icu/lang/UCharacterEnums.java
new file mode 100644
index 00000000..38f8684e
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/icu/lang/UCharacterEnums.java
@@ -0,0 +1,588 @@
+/*
+ * Copyright (c) 2005, 2022, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+/*
+/**
+ *******************************************************************************
+ * Copyright (C) 2004, International Business Machines Corporation and         *
+ * others. All Rights Reserved.                                                *
+ *******************************************************************************
+ */
+// CHANGELOG
+//      2005-05-19 Edward Wang
+//          - copy this file from icu4jsrc_3_2/src/com/ibm/icu/lang/UCharacterEnums.java
+//          - move from package com.ibm.icu.lang to package sun.net.idn
+//
+//      2011-09-06 Kurchi Subhra Hazra
+//          - Added @Deprecated tag to the following:
+//            - class UCharacterEnums
+//            - interfaces ECharacterCategory, ECharacterDirection
+//            - fields INITIAL_QUOTE_PUNCTUATION, FINAL_QUOTE_PUNCTUATION,
+//              DIRECTIONALITY_LEFT_TO_RIGHT, DIRECTIONALITY_RIGHT_TO_LEFT,
+//              DIRECTIONALITY_EUROPEAN_NUMBER, DIRECTIONALITY_EUROPEAN_NUMBER_SEPARATOR
+//              DIRECTIONALITY_EUROPEAN_NUMBER_TERMINATOR, DIRECTIONALITY_ARABIC_NUMBER,
+//              DIRECTIONALITY_COMMON_NUMBER_SEPARATOR, DIRECTIONALITY_PARAGRAPH_SEPARATOR,
+//              DIRECTIONALITY_SEGMENT_SEPARATOR, DIRECTIONALITY_WHITESPACE,
+//              DIRECTIONALITY_OTHER_NEUTRALS, DIRECTIONALITY_LEFT_TO_RIGHT_EMBEDDING,
+//              DIRECTIONALITY_LEFT_TO_RIGHT_OVERRIDE, DIRECTIONALITY_RIGHT_TO_LEFT_ARABIC,
+//              DIRECTIONALITY_RIGHT_TO_LEFT_EMBEDDING, DIRECTIONALITY_RIGHT_TO_LEFT_OVERRIDE,
+//              DIRECTIONALITY_POP_DIRECTIONAL_FORMAT, DIRECTIONALITY_NON_SPACING_MARK,
+//              DIRECTIONALITY_BOUNDARY_NEUTRAL, DIRECTIONALITY_UNDEFINED
+//
+
+package jdk.internal.icu.lang;
+
+/**
+ * A container for the different 'enumerated types' used by UCharacter.
+ * @draft ICU 3.0
+ * @deprecated This is a draft API and might change in a future release of ICU.
+ */
+
+@Deprecated
+class UCharacterEnums {
+
+    /** This is just a namespace, it is not instantiable. */
+    private UCharacterEnums() {};
+
+    /**
+     * 'Enum' for the CharacterCategory constants.  These constants are
+     * compatible in name <b>but not in value</b> with those defined in
+     * <code>java.lang.Character</code>.
+     * @see UCharacterCategory
+     * @draft ICU 3.0
+     * @deprecated This is a draft API and might change in a future release of ICU.
+     */
+    @Deprecated
+    public static interface ECharacterCategory {
+        /**
+         * Unassigned character type
+         * @stable ICU 2.1
+         */
+        public static final int UNASSIGNED              = 0;
+
+        /**
+         * Character type Cn
+         * Not Assigned (no characters in [UnicodeData.txt] have this property)
+         * @stable ICU 2.6
+         */
+        public static final int GENERAL_OTHER_TYPES     = 0;
+
+        /**
+         * Character type Lu
+         * @stable ICU 2.1
+         */
+        public static final int UPPERCASE_LETTER        = 1;
+
+        /**
+         * Character type Ll
+         * @stable ICU 2.1
+         */
+        public static final int LOWERCASE_LETTER        = 2;
+
+        /**
+         * Character type Lt
+         * @stable ICU 2.1
+         */
+
+        public static final int TITLECASE_LETTER        = 3;
+
+        /**
+         * Character type Lm
+         * @stable ICU 2.1
+         */
+        public static final int MODIFIER_LETTER         = 4;
+
+        /**
+         * Character type Lo
+         * @stable ICU 2.1
+         */
+        public static final int OTHER_LETTER            = 5;
+
+        /**
+         * Character type Mn
+         * @stable ICU 2.1
+         */
+        public static final int NON_SPACING_MARK        = 6;
+
+        /**
+         * Character type Me
+         * @stable ICU 2.1
+         */
+        public static final int ENCLOSING_MARK          = 7;
+
+        /**
+         * Character type Mc
+         * @stable ICU 2.1
+         */
+        public static final int COMBINING_SPACING_MARK  = 8;
+
+        /**
+         * Character type Nd
+         * @stable ICU 2.1
+         */
+        public static final int DECIMAL_DIGIT_NUMBER    = 9;
+
+        /**
+         * Character type Nl
+         * @stable ICU 2.1
+         */
+        public static final int LETTER_NUMBER           = 10;
+
+        /**
+         * Character type No
+         * @stable ICU 2.1
+         */
+        public static final int OTHER_NUMBER            = 11;
+
+        /**
+         * Character type Zs
+         * @stable ICU 2.1
+         */
+        public static final int SPACE_SEPARATOR         = 12;
+
+        /**
+         * Character type Zl
+         * @stable ICU 2.1
+         */
+        public static final int LINE_SEPARATOR          = 13;
+
+        /**
+         * Character type Zp
+         * @stable ICU 2.1
+         */
+        public static final int PARAGRAPH_SEPARATOR     = 14;
+
+        /**
+         * Character type Cc
+         * @stable ICU 2.1
+         */
+        public static final int CONTROL                 = 15;
+
+        /**
+         * Character type Cf
+         * @stable ICU 2.1
+         */
+        public static final int FORMAT                  = 16;
+
+        /**
+         * Character type Co
+         * @stable ICU 2.1
+         */
+        public static final int PRIVATE_USE             = 17;
+
+        /**
+         * Character type Cs
+         * @stable ICU 2.1
+         */
+        public static final int SURROGATE               = 18;
+
+        /**
+         * Character type Pd
+         * @stable ICU 2.1
+         */
+        public static final int DASH_PUNCTUATION        = 19;
+
+        /**
+         * Character type Ps
+         * @stable ICU 2.1
+         */
+        public static final int START_PUNCTUATION       = 20;
+
+        /**
+         * Character type Pe
+         * @stable ICU 2.1
+         */
+        public static final int END_PUNCTUATION         = 21;
+
+        /**
+         * Character type Pc
+         * @stable ICU 2.1
+         */
+        public static final int CONNECTOR_PUNCTUATION   = 22;
+
+        /**
+         * Character type Po
+         * @stable ICU 2.1
+         */
+        public static final int OTHER_PUNCTUATION       = 23;
+
+        /**
+         * Character type Sm
+         * @stable ICU 2.1
+         */
+        public static final int MATH_SYMBOL             = 24;
+
+        /**
+         * Character type Sc
+         * @stable ICU 2.1
+         */
+        public static final int CURRENCY_SYMBOL         = 25;
+
+        /**
+         * Character type Sk
+         * @stable ICU 2.1
+         */
+        public static final int MODIFIER_SYMBOL         = 26;
+
+        /**
+         * Character type So
+         * @stable ICU 2.1
+         */
+        public static final int OTHER_SYMBOL            = 27;
+
+        /**
+         * Character type Pi
+         * @see #INITIAL_QUOTE_PUNCTUATION
+         * @stable ICU 2.1
+         */
+        public static final int INITIAL_PUNCTUATION     = 28;
+
+        /**
+         * Character type Pi
+         * This name is compatible with java.lang.Character's name for this type.
+         * @see #INITIAL_PUNCTUATION
+         * @draft ICU 2.8
+         * @deprecated This is a draft API and might change in a future release of ICU.
+         */
+        @Deprecated
+        public static final int INITIAL_QUOTE_PUNCTUATION = 28;
+
+        /**
+         * Character type Pf
+         * @see #FINAL_QUOTE_PUNCTUATION
+         * @stable ICU 2.1
+         */
+        public static final int FINAL_PUNCTUATION       = 29;
+
+        /**
+         * Character type Pf
+         * This name is compatible with java.lang.Character's name for this type.
+         * @see #FINAL_PUNCTUATION
+         * @draft ICU 2.8
+         * @deprecated This is a draft API and might change in a future release of ICU.
+         */
+        @Deprecated
+        public static final int FINAL_QUOTE_PUNCTUATION   = 29;
+
+        /**
+         * Character type count
+         * @stable ICU 2.1
+         */
+        public static final int CHAR_CATEGORY_COUNT     = 30;
+    }
+
+    /**
+     * 'Enum' for the CharacterDirection constants.  There are two sets
+     * of names, those used in ICU, and those used in the JDK.  The
+     * JDK constants are compatible in name <b>but not in value</b>
+     * with those defined in <code>java.lang.Character</code>.
+     * @see UCharacterDirection
+     * @draft ICU 3.0
+     * @deprecated This is a draft API and might change in a future release of ICU.
+     */
+
+    @Deprecated
+    public static interface ECharacterDirection {
+        /**
+         * Directional type L
+         * @stable ICU 2.1
+         */
+        public static final int LEFT_TO_RIGHT              = 0;
+
+        /**
+         * JDK-compatible synonum for LEFT_TO_RIGHT.
+         * @draft ICU 3.0
+         * @deprecated This is a draft API and might change in a future release of ICU.
+         */
+        @Deprecated
+        public static final byte DIRECTIONALITY_LEFT_TO_RIGHT = (byte)LEFT_TO_RIGHT;
+
+        /**
+         * Directional type R
+         * @stable ICU 2.1
+         */
+        public static final int RIGHT_TO_LEFT              = 1;
+
+        /**
+         * JDK-compatible synonum for RIGHT_TO_LEFT.
+         * @draft ICU 3.0
+         * @deprecated This is a draft API and might change in a future release of ICU.
+         */
+        @Deprecated
+        public static final byte DIRECTIONALITY_RIGHT_TO_LEFT = (byte)RIGHT_TO_LEFT;
+
+        /**
+         * Directional type EN
+         * @stable ICU 2.1
+         */
+        public static final int EUROPEAN_NUMBER            = 2;
+
+        /**
+         * JDK-compatible synonum for EUROPEAN_NUMBER.
+         * @draft ICU 3.0
+         * @deprecated This is a draft API and might change in a future release of ICU.
+         */
+        @Deprecated
+        public static final byte DIRECTIONALITY_EUROPEAN_NUMBER = (byte)EUROPEAN_NUMBER;
+
+        /**
+         * Directional type ES
+         * @stable ICU 2.1
+         */
+        public static final int EUROPEAN_NUMBER_SEPARATOR  = 3;
+
+        /**
+         * JDK-compatible synonum for EUROPEAN_NUMBER_SEPARATOR.
+         * @draft ICU 3.0
+         * @deprecated This is a draft API and might change in a future release of ICU.
+         */
+        @Deprecated
+        public static final byte DIRECTIONALITY_EUROPEAN_NUMBER_SEPARATOR = (byte)EUROPEAN_NUMBER_SEPARATOR;
+
+        /**
+         * Directional type ET
+         * @stable ICU 2.1
+         */
+        public static final int EUROPEAN_NUMBER_TERMINATOR = 4;
+
+        /**
+         * JDK-compatible synonum for EUROPEAN_NUMBER_TERMINATOR.
+         * @draft ICU 3.0
+         * @deprecated This is a draft API and might change in a future release of ICU.
+         */
+        @Deprecated
+        public static final byte DIRECTIONALITY_EUROPEAN_NUMBER_TERMINATOR = (byte)EUROPEAN_NUMBER_TERMINATOR;
+
+        /**
+         * Directional type AN
+         * @stable ICU 2.1
+         */
+        public static final int ARABIC_NUMBER              = 5;
+
+        /**
+         * JDK-compatible synonum for ARABIC_NUMBER.
+         * @draft ICU 3.0
+         * @deprecated This is a draft API and might change in a future release of ICU.
+         */
+        @Deprecated
+        public static final byte DIRECTIONALITY_ARABIC_NUMBER = (byte)ARABIC_NUMBER;
+
+        /**
+         * Directional type CS
+         * @stable ICU 2.1
+         */
+        public static final int COMMON_NUMBER_SEPARATOR    = 6;
+
+        /**
+         * JDK-compatible synonum for COMMON_NUMBER_SEPARATOR.
+         * @draft ICU 3.0
+         * @deprecated This is a draft API and might change in a future release of ICU.
+         */
+        @Deprecated
+        public static final byte DIRECTIONALITY_COMMON_NUMBER_SEPARATOR = (byte)COMMON_NUMBER_SEPARATOR;
+
+        /**
+         * Directional type B
+         * @stable ICU 2.1
+         */
+        public static final int BLOCK_SEPARATOR            = 7;
+
+        /**
+         * JDK-compatible synonum for BLOCK_SEPARATOR.
+         * @draft ICU 3.0
+         * @deprecated This is a draft API and might change in a future release of ICU.
+         */
+        @Deprecated
+        public static final byte DIRECTIONALITY_PARAGRAPH_SEPARATOR = (byte)BLOCK_SEPARATOR;
+
+        /**
+         * Directional type S
+         * @stable ICU 2.1
+         */
+        public static final int SEGMENT_SEPARATOR          = 8;
+
+        /**
+         * JDK-compatible synonum for SEGMENT_SEPARATOR.
+         * @draft ICU 3.0
+         * @deprecated This is a draft API and might change in a future release of ICU.
+         */
+        @Deprecated
+        public static final byte DIRECTIONALITY_SEGMENT_SEPARATOR = (byte)SEGMENT_SEPARATOR;
+
+        /**
+         * Directional type WS
+         * @stable ICU 2.1
+         */
+        public static final int WHITE_SPACE_NEUTRAL        = 9;
+
+        /**
+         * JDK-compatible synonum for WHITE_SPACE_NEUTRAL.
+         * @draft ICU 3.0
+         * @deprecated This is a draft API and might change in a future release of ICU.
+         */
+        @Deprecated
+        public static final byte DIRECTIONALITY_WHITESPACE = (byte)WHITE_SPACE_NEUTRAL;
+
+        /**
+         * Directional type ON
+         * @stable ICU 2.1
+         */
+        public static final int OTHER_NEUTRAL              = 10;
+
+        /**
+         * JDK-compatible synonum for OTHER_NEUTRAL.
+         * @draft ICU 3.0
+         * @deprecated This is a draft API and might change in a future release of ICU.
+         */
+        @Deprecated
+        public static final byte DIRECTIONALITY_OTHER_NEUTRALS = (byte)OTHER_NEUTRAL;
+
+        /**
+         * Directional type LRE
+         * @stable ICU 2.1
+         */
+        public static final int LEFT_TO_RIGHT_EMBEDDING    = 11;
+
+        /**
+         * JDK-compatible synonum for LEFT_TO_RIGHT_EMBEDDING.
+         * @draft ICU 3.0
+         * @deprecated This is a draft API and might change in a future release of ICU.
+         */
+        @Deprecated
+        public static final byte DIRECTIONALITY_LEFT_TO_RIGHT_EMBEDDING = (byte)LEFT_TO_RIGHT_EMBEDDING;
+
+        /**
+         * Directional type LRO
+         * @stable ICU 2.1
+         */
+        public static final int LEFT_TO_RIGHT_OVERRIDE     = 12;
+
+        /**
+         * JDK-compatible synonum for LEFT_TO_RIGHT_OVERRIDE.
+         * @draft ICU 3.0
+         * @deprecated This is a draft API and might change in a future release of ICU.
+         */
+        @Deprecated
+        public static final byte DIRECTIONALITY_LEFT_TO_RIGHT_OVERRIDE = (byte)LEFT_TO_RIGHT_OVERRIDE;
+
+        /**
+         * Directional type AL
+         * @stable ICU 2.1
+         */
+        public static final int RIGHT_TO_LEFT_ARABIC       = 13;
+
+        /**
+         * JDK-compatible synonum for RIGHT_TO_LEFT_ARABIC.
+         * @draft ICU 3.0
+         * @deprecated This is a draft API and might change in a future release of ICU.
+         */
+        @Deprecated
+        public static final byte DIRECTIONALITY_RIGHT_TO_LEFT_ARABIC = (byte)RIGHT_TO_LEFT_ARABIC;
+
+        /**
+         * Directional type RLE
+         * @stable ICU 2.1
+         */
+        public static final int RIGHT_TO_LEFT_EMBEDDING    = 14;
+
+        /**
+         * JDK-compatible synonum for RIGHT_TO_LEFT_EMBEDDING.
+         * @draft ICU 3.0
+         * @deprecated This is a draft API and might change in a future release of ICU.
+         */
+        @Deprecated
+        public static final byte DIRECTIONALITY_RIGHT_TO_LEFT_EMBEDDING = (byte)RIGHT_TO_LEFT_EMBEDDING;
+
+        /**
+         * Directional type RLO
+         * @stable ICU 2.1
+         */
+        public static final int RIGHT_TO_LEFT_OVERRIDE     = 15;
+
+        /**
+         * JDK-compatible synonum for RIGHT_TO_LEFT_OVERRIDE.
+         * @draft ICU 3.0
+         * @deprecated This is a draft API and might change in a future release of ICU.
+         */
+        @Deprecated
+        public static final byte DIRECTIONALITY_RIGHT_TO_LEFT_OVERRIDE = (byte)RIGHT_TO_LEFT_OVERRIDE;
+
+        /**
+         * Directional type PDF
+         * @stable ICU 2.1
+         */
+        public static final int POP_DIRECTIONAL_FORMAT     = 16;
+
+        /**
+         * JDK-compatible synonum for POP_DIRECTIONAL_FORMAT.
+         * @draft ICU 3.0
+         * @deprecated This is a draft API and might change in a future release of ICU.
+         */
+        @Deprecated
+        public static final byte DIRECTIONALITY_POP_DIRECTIONAL_FORMAT = (byte)POP_DIRECTIONAL_FORMAT;
+
+        /**
+         * Directional type NSM
+         * @stable ICU 2.1
+         */
+        public static final int DIR_NON_SPACING_MARK       = 17;
+
+        /**
+         * JDK-compatible synonum for DIR_NON_SPACING_MARK.
+         * @draft ICU 3.0
+         * @deprecated This is a draft API and might change in a future release of ICU.
+         */
+        @Deprecated
+        public static final byte DIRECTIONALITY_NON_SPACING_MARK = (byte)DIR_NON_SPACING_MARK;
+
+        /**
+         * Directional type BN
+         * @stable ICU 2.1
+         */
+        public static final int BOUNDARY_NEUTRAL           = 18;
+
+        /**
+         * JDK-compatible synonum for BOUNDARY_NEUTRAL.
+         * @draft ICU 3.0
+         * @deprecated This is a draft API and might change in a future release of ICU.
+         */
+        @Deprecated
+        public static final byte DIRECTIONALITY_BOUNDARY_NEUTRAL = (byte)BOUNDARY_NEUTRAL;
+
+        /**
+         * Number of directional types
+         * @stable ICU 2.1
+         */
+        public static final int CHAR_DIRECTION_COUNT       = 19;
+
+        /**
+         * Undefined bidirectional character type. Undefined <code>char</code>
+         * values have undefined directionality in the Unicode specification.
+         * @draft ICU 3.0
+         * @deprecated This is a draft API and might change in a future release of ICU.
+         */
+        @Deprecated
+        public static final byte DIRECTIONALITY_UNDEFINED = -1;
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/icu/text/BidiBase$BidiPairedBracketType.class b/tests/test_data/std/jdk/internal/icu/text/BidiBase$BidiPairedBracketType.class
new file mode 100644
index 0000000000000000000000000000000000000000..4b772fb56be731dcda506c8cfc638ec1f389ca38
GIT binary patch
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diff --git a/tests/test_data/std/jdk/internal/icu/text/BidiBase$BracketData.class b/tests/test_data/std/jdk/internal/icu/text/BidiBase$BracketData.class
new file mode 100644
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GIT binary patch
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diff --git a/tests/test_data/std/jdk/internal/icu/text/BidiBase$ImpTabPair.class b/tests/test_data/std/jdk/internal/icu/text/BidiBase$ImpTabPair.class
new file mode 100644
index 0000000000000000000000000000000000000000..9fa76905304a4c6ce5652bef30fc78b6602773a1
GIT binary patch
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diff --git a/tests/test_data/std/jdk/internal/icu/text/BidiBase$InsertPoints.class b/tests/test_data/std/jdk/internal/icu/text/BidiBase$InsertPoints.class
new file mode 100644
index 0000000000000000000000000000000000000000..fa15f367e602c41e7f9be2ee0c45e5c6e1c97477
GIT binary patch
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diff --git a/tests/test_data/std/jdk/internal/icu/text/BidiBase$IsoRun.class b/tests/test_data/std/jdk/internal/icu/text/BidiBase$IsoRun.class
new file mode 100644
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GIT binary patch
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diff --git a/tests/test_data/std/jdk/internal/icu/text/BidiBase$Isolate.class b/tests/test_data/std/jdk/internal/icu/text/BidiBase$Isolate.class
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GIT binary patch
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diff --git a/tests/test_data/std/jdk/internal/icu/text/BidiBase$LevState.class b/tests/test_data/std/jdk/internal/icu/text/BidiBase$LevState.class
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GIT binary patch
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diff --git a/tests/test_data/std/jdk/internal/icu/text/BidiBase$NumericShapings.class b/tests/test_data/std/jdk/internal/icu/text/BidiBase$NumericShapings.class
new file mode 100644
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GIT binary patch
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diff --git a/tests/test_data/std/jdk/internal/icu/text/BidiBase$Opening.class b/tests/test_data/std/jdk/internal/icu/text/BidiBase$Opening.class
new file mode 100644
index 0000000000000000000000000000000000000000..5e8bc303d0cb86efdd1d20beb7a1c1088122b356
GIT binary patch
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diff --git a/tests/test_data/std/jdk/internal/icu/text/BidiBase$Point.class b/tests/test_data/std/jdk/internal/icu/text/BidiBase$Point.class
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new file mode 100644
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diff --git a/tests/test_data/std/jdk/internal/icu/text/BidiBase.java b/tests/test_data/std/jdk/internal/icu/text/BidiBase.java
new file mode 100644
index 00000000..bfeb0b7e
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/icu/text/BidiBase.java
@@ -0,0 +1,4783 @@
+/*
+ * Copyright (c) 2009, 2022, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/*
+*******************************************************************************
+*   Copyright (C) 2001-2014, International Business Machines
+*   Corporation and others.  All Rights Reserved.
+*******************************************************************************
+*/
+
+/* FOOD FOR THOUGHT: currently the reordering modes are a mixture of
+ * algorithm for direct BiDi, algorithm for inverse Bidi and the bizarre
+ * concept of RUNS_ONLY which is a double operation.
+ * It could be advantageous to divide this into 3 concepts:
+ * a) Operation: direct / inverse / RUNS_ONLY
+ * b) Direct algorithm: default / NUMBERS_SPECIAL / GROUP_NUMBERS_WITH_L
+ * c) Inverse algorithm: default / INVERSE_LIKE_DIRECT / NUMBERS_SPECIAL
+ * This would allow combinations not possible today like RUNS_ONLY with
+ * NUMBERS_SPECIAL.
+ * Also allow to set INSERT_MARKS for the direct step of RUNS_ONLY and
+ * REMOVE_CONTROLS for the inverse step.
+ * Not all combinations would be supported, and probably not all do make sense.
+ * This would need to document which ones are supported and what are the
+ * fallbacks for unsupported combinations.
+ */
+
+package jdk.internal.icu.text;
+
+import java.lang.reflect.Array;
+import java.text.AttributedCharacterIterator;
+import java.text.Bidi;
+import java.util.Arrays;
+import jdk.internal.access.JavaAWTFontAccess;
+import jdk.internal.access.SharedSecrets;
+import jdk.internal.icu.lang.UCharacter;
+import jdk.internal.icu.impl.UBiDiProps;
+
+/**
+ *
+ * <h2>Bidi algorithm for ICU</h2>
+ *
+ * This is an implementation of the Unicode Bidirectional Algorithm. The
+ * algorithm is defined in the
+ * <a href="https://www.unicode.org/reports/tr9/">Unicode Standard Annex #9:
+ * Unicode Bidirectional Algorithm</a>.
+ * <p>
+ *
+ * Note: Libraries that perform a bidirectional algorithm and reorder strings
+ * accordingly are sometimes called "Storage Layout Engines". ICU's Bidi and
+ * shaping (ArabicShaping) classes can be used at the core of such "Storage
+ * Layout Engines".
+ *
+ * <h3>General remarks about the API:</h3>
+ *
+ * The "limit" of a sequence of characters is the position just after
+ * their last character, i.e., one more than that position.
+ * <p>
+ *
+ * Some of the API methods provide access to "runs". Such a
+ * "run" is defined as a sequence of characters that are at the same
+ * embedding level after performing the Bidi algorithm.
+ *
+ * <h3>Basic concept: paragraph</h3>
+ * A piece of text can be divided into several paragraphs by characters
+ * with the Bidi class <code>Block Separator</code>. For handling of
+ * paragraphs, see:
+ * <ul>
+ * <li>{@link #countParagraphs}
+ * <li>{@link #getParaLevel}
+ * <li>{@link #getParagraph}
+ * <li>{@link #getParagraphByIndex}
+ * </ul>
+ *
+ * <h3>Basic concept: text direction</h3>
+ * The direction of a piece of text may be:
+ * <ul>
+ * <li>{@link #LTR}
+ * <li>{@link #RTL}
+ * <li>{@link #MIXED}
+ * <li>{@link #NEUTRAL}
+ * </ul>
+ *
+ * <h3>Basic concept: levels</h3>
+ *
+ * Levels in this API represent embedding levels according to the Unicode
+ * Bidirectional Algorithm.
+ * Their low-order bit (even/odd value) indicates the visual direction.<p>
+ *
+ * Levels can be abstract values when used for the
+ * <code>paraLevel</code> and <code>embeddingLevels</code>
+ * arguments of <code>setPara()</code>; there:
+ * <ul>
+ * <li>the high-order bit of an <code>embeddingLevels[]</code>
+ * value indicates whether the using application is
+ * specifying the level of a character to <i>override</i> whatever the
+ * Bidi implementation would resolve it to.</li>
+ * <li><code>paraLevel</code> can be set to the
+ * pseudo-level values <code>LEVEL_DEFAULT_LTR</code>
+ * and <code>LEVEL_DEFAULT_RTL</code>.</li>
+ * </ul>
+ *
+ * <p>The related constants are not real, valid level values.
+ * <code>DEFAULT_XXX</code> can be used to specify
+ * a default for the paragraph level for
+ * when the <code>setPara()</code> method
+ * shall determine it but there is no
+ * strongly typed character in the input.<p>
+ *
+ * Note that the value for <code>LEVEL_DEFAULT_LTR</code> is even
+ * and the one for <code>LEVEL_DEFAULT_RTL</code> is odd,
+ * just like with normal LTR and RTL level values -
+ * these special values are designed that way. Also, the implementation
+ * assumes that MAX_EXPLICIT_LEVEL is odd.
+ *
+ * <p><b>See Also:</b>
+ * <ul>
+ * <li>{@link #LEVEL_DEFAULT_LTR}
+ * <li>{@link #LEVEL_DEFAULT_RTL}
+ * <li>{@link #LEVEL_OVERRIDE}
+ * <li>{@link #MAX_EXPLICIT_LEVEL}
+ * <li>{@link #setPara}
+ * </ul>
+ *
+ * <h3>Basic concept: Reordering Mode</h3>
+ * Reordering mode values indicate which variant of the Bidi algorithm to
+ * use.
+ *
+ * <p><b>See Also:</b>
+ * <ul>
+ * <li>{@link #setReorderingMode}
+ * <li>{@link #REORDER_DEFAULT}
+ * <li>{@link #REORDER_NUMBERS_SPECIAL}
+ * <li>{@link #REORDER_GROUP_NUMBERS_WITH_R}
+ * <li>{@link #REORDER_RUNS_ONLY}
+ * <li>{@link #REORDER_INVERSE_NUMBERS_AS_L}
+ * <li>{@link #REORDER_INVERSE_LIKE_DIRECT}
+ * <li>{@link #REORDER_INVERSE_FOR_NUMBERS_SPECIAL}
+ * </ul>
+ *
+ * <h3>Basic concept: Reordering Options</h3>
+ * Reordering options can be applied during Bidi text transformations.
+ *
+ * <p><b>See Also:</b>
+ * <ul>
+ * <li>{@link #setReorderingOptions}
+ * <li>{@link #OPTION_DEFAULT}
+ * <li>{@link #OPTION_INSERT_MARKS}
+ * <li>{@link #OPTION_REMOVE_CONTROLS}
+ * <li>{@link #OPTION_STREAMING}
+ * </ul>
+ *
+ *
+ * @author Simon Montagu, Matitiahu Allouche (ported from C code written by Markus W. Scherer)
+ * @stable ICU 3.8
+ *
+ *
+ * <h4> Sample code for the ICU Bidi API </h4>
+ *
+ * <h5>Rendering a paragraph with the ICU Bidi API</h5>
+ *
+ * This is (hypothetical) sample code that illustrates how the ICU Bidi API
+ * could be used to render a paragraph of text. Rendering code depends highly on
+ * the graphics system, therefore this sample code must make a lot of
+ * assumptions, which may or may not match any existing graphics system's
+ * properties.
+ *
+ * <p>
+ * The basic assumptions are:
+ * </p>
+ * <ul>
+ * <li>Rendering is done from left to right on a horizontal line.</li>
+ * <li>A run of single-style, unidirectional text can be rendered at once.
+ * </li>
+ * <li>Such a run of text is passed to the graphics system with characters
+ * (code units) in logical order.</li>
+ * <li>The line-breaking algorithm is very complicated and Locale-dependent -
+ * and therefore its implementation omitted from this sample code.</li>
+ * </ul>
+ *
+ * <pre>{@code
+ *
+ *  package com.ibm.icu.dev.test.bidi;
+ *
+ *  import com.ibm.icu.text.Bidi;
+ *  import com.ibm.icu.text.BidiRun;
+ *
+ *  public class Sample {
+ *
+ *      static final int styleNormal = 0;
+ *      static final int styleSelected = 1;
+ *      static final int styleBold = 2;
+ *      static final int styleItalics = 4;
+ *      static final int styleSuper=8;
+ *      static final int styleSub = 16;
+ *
+ *      static class StyleRun {
+ *          int limit;
+ *          int style;
+ *
+ *          public StyleRun(int limit, int style) {
+ *              this.limit = limit;
+ *              this.style = style;
+ *          }
+ *      }
+ *
+ *      static class Bounds {
+ *          int start;
+ *          int limit;
+ *
+ *          public Bounds(int start, int limit) {
+ *              this.start = start;
+ *              this.limit = limit;
+ *          }
+ *      }
+ *
+ *      static int getTextWidth(String text, int start, int limit,
+ *                              StyleRun[] styleRuns, int styleRunCount) {
+ *          // simplistic way to compute the width
+ *          return limit - start;
+ *      }
+ *
+ *      // set limit and StyleRun limit for a line
+ *      // from text[start] and from styleRuns[styleRunStart]
+ *      // using Bidi.getLogicalRun(...)
+ *      // returns line width
+ *      static int getLineBreak(String text, Bounds line, Bidi para,
+ *                              StyleRun styleRuns[], Bounds styleRun) {
+ *          // dummy return
+ *          return 0;
+ *      }
+ *
+ *      // render runs on a line sequentially, always from left to right
+ *
+ *      // prepare rendering a new line
+ *      static void startLine(byte textDirection, int lineWidth) {
+ *          System.out.println();
+ *      }
+ *
+ *      // render a run of text and advance to the right by the run width
+ *      // the text[start..limit-1] is always in logical order
+ *      static void renderRun(String text, int start, int limit,
+ *                            byte textDirection, int style) {
+ *      }
+ *
+ *      // We could compute a cross-product
+ *      // from the style runs with the directional runs
+ *      // and then reorder it.
+ *      // Instead, here we iterate over each run type
+ *      // and render the intersections -
+ *      // with shortcuts in simple (and common) cases.
+ *      // renderParagraph() is the main function.
+ *
+ *      // render a directional run with
+ *      // (possibly) multiple style runs intersecting with it
+ *      static void renderDirectionalRun(String text, int start, int limit,
+ *                                       byte direction, StyleRun styleRuns[],
+ *                                       int styleRunCount) {
+ *          int i;
+ *
+ *          // iterate over style runs
+ *          if (direction == Bidi.LTR) {
+ *              int styleLimit;
+ *              for (i = 0; i < styleRunCount; ++i) {
+ *                  styleLimit = styleRuns[i].limit;
+ *                  if (start < styleLimit) {
+ *                      if (styleLimit > limit) {
+ *                          styleLimit = limit;
+ *                      }
+ *                      renderRun(text, start, styleLimit,
+ *                                direction, styleRuns[i].style);
+ *                      if (styleLimit == limit) {
+ *                          break;
+ *                      }
+ *                      start = styleLimit;
+ *                  }
+ *              }
+ *          } else {
+ *              int styleStart;
+ *
+ *              for (i = styleRunCount-1; i >= 0; --i) {
+ *                  if (i > 0) {
+ *                      styleStart = styleRuns[i-1].limit;
+ *                  } else {
+ *                      styleStart = 0;
+ *                  }
+ *                  if (limit >= styleStart) {
+ *                      if (styleStart < start) {
+ *                          styleStart = start;
+ *                      }
+ *                      renderRun(text, styleStart, limit, direction,
+ *                                styleRuns[i].style);
+ *                      if (styleStart == start) {
+ *                          break;
+ *                      }
+ *                      limit = styleStart;
+ *                  }
+ *              }
+ *          }
+ *      }
+ *
+ *      // the line object represents text[start..limit-1]
+ *      static void renderLine(Bidi line, String text, int start, int limit,
+ *                             StyleRun styleRuns[], int styleRunCount) {
+ *          byte direction = line.getDirection();
+ *          if (direction != Bidi.MIXED) {
+ *              // unidirectional
+ *              if (styleRunCount <= 1) {
+ *                  renderRun(text, start, limit, direction, styleRuns[0].style);
+ *              } else {
+ *                  renderDirectionalRun(text, start, limit, direction,
+ *                                       styleRuns, styleRunCount);
+ *              }
+ *          } else {
+ *              // mixed-directional
+ *              int count, i;
+ *              BidiRun run;
+ *
+ *              try {
+ *                  count = line.countRuns();
+ *              } catch (IllegalStateException e) {
+ *                  e.printStackTrace();
+ *                  return;
+ *              }
+ *              if (styleRunCount <= 1) {
+ *                  int style = styleRuns[0].style;
+ *
+ *                  // iterate over directional runs
+ *                  for (i = 0; i < count; ++i) {
+ *                      run = line.getVisualRun(i);
+ *                      renderRun(text, run.getStart(), run.getLimit(),
+ *                                run.getDirection(), style);
+ *                  }
+ *              } else {
+ *                  // iterate over both directional and style runs
+ *                  for (i = 0; i < count; ++i) {
+ *                      run = line.getVisualRun(i);
+ *                      renderDirectionalRun(text, run.getStart(),
+ *                                           run.getLimit(), run.getDirection(),
+ *                                           styleRuns, styleRunCount);
+ *                  }
+ *              }
+ *          }
+ *      }
+ *
+ *      static void renderParagraph(String text, byte textDirection,
+ *                                  StyleRun styleRuns[], int styleRunCount,
+ *                                  int lineWidth) {
+ *          int length = text.length();
+ *          Bidi para = new Bidi();
+ *          try {
+ *              para.setPara(text,
+ *                           textDirection != 0 ? Bidi.LEVEL_DEFAULT_RTL
+ *                                              : Bidi.LEVEL_DEFAULT_LTR,
+ *                           null);
+ *          } catch (Exception e) {
+ *              e.printStackTrace();
+ *              return;
+ *          }
+ *          byte paraLevel = (byte)(1 & para.getParaLevel());
+ *          StyleRun styleRun = new StyleRun(length, styleNormal);
+ *
+ *          if (styleRuns == null || styleRunCount <= 0) {
+ *              styleRuns = new StyleRun[1];
+ *              styleRunCount = 1;
+ *              styleRuns[0] = styleRun;
+ *          }
+ *          // assume styleRuns[styleRunCount-1].limit>=length
+ *
+ *          int width = getTextWidth(text, 0, length, styleRuns, styleRunCount);
+ *          if (width <= lineWidth) {
+ *              // everything fits onto one line
+ *
+ *              // prepare rendering a new line from either left or right
+ *              startLine(paraLevel, width);
+ *
+ *              renderLine(para, text, 0, length, styleRuns, styleRunCount);
+ *          } else {
+ *              // we need to render several lines
+ *              Bidi line = new Bidi(length, 0);
+ *              int start = 0, limit;
+ *              int styleRunStart = 0, styleRunLimit;
+ *
+ *              for (;;) {
+ *                  limit = length;
+ *                  styleRunLimit = styleRunCount;
+ *                  width = getLineBreak(text, new Bounds(start, limit),
+ *                                       para, styleRuns,
+ *                                       new Bounds(styleRunStart, styleRunLimit));
+ *                  try {
+ *                      line = para.setLine(start, limit);
+ *                  } catch (Exception e) {
+ *                      e.printStackTrace();
+ *                      return;
+ *                  }
+ *                  // prepare rendering a new line
+ *                  // from either left or right
+ *                  startLine(paraLevel, width);
+ *
+ *                  if (styleRunStart > 0) {
+ *                      int newRunCount = styleRuns.length - styleRunStart;
+ *                      StyleRun[] newRuns = new StyleRun[newRunCount];
+ *                      System.arraycopy(styleRuns, styleRunStart, newRuns, 0,
+ *                                       newRunCount);
+ *                      renderLine(line, text, start, limit, newRuns,
+ *                                 styleRunLimit - styleRunStart);
+ *                  } else {
+ *                      renderLine(line, text, start, limit, styleRuns,
+ *                                 styleRunLimit - styleRunStart);
+ *                  }
+ *                  if (limit == length) {
+ *                      break;
+ *                  }
+ *                  start = limit;
+ *                  styleRunStart = styleRunLimit - 1;
+ *                  if (start >= styleRuns[styleRunStart].limit) {
+ *                      ++styleRunStart;
+ *                  }
+ *              }
+ *          }
+ *      }
+ *
+ *      public static void main(String[] args)
+ *      {
+ *          renderParagraph("Some Latin text...", Bidi.LTR, null, 0, 80);
+ *          renderParagraph("Some Hebrew text...", Bidi.RTL, null, 0, 60);
+ *      }
+ *  }
+ *
+ * }</pre>
+ */
+
+/*
+ * General implementation notes:
+ *
+ * Throughout the implementation, there are comments like (W2) that refer to
+ * rules of the BiDi algorithm, in this example to the second rule of the
+ * resolution of weak types.
+ *
+ * For handling surrogate pairs, where two UChar's form one "abstract" (or UTF-32)
+ * character according to UTF-16, the second UChar gets the directional property of
+ * the entire character assigned, while the first one gets a BN, a boundary
+ * neutral, type, which is ignored by most of the algorithm according to
+ * rule (X9) and the implementation suggestions of the BiDi algorithm.
+ *
+ * Later, adjustWSLevels() will set the level for each BN to that of the
+ * following character (UChar), which results in surrogate pairs getting the
+ * same level on each of their surrogates.
+ *
+ * In a UTF-8 implementation, the same thing could be done: the last byte of
+ * a multi-byte sequence would get the "real" property, while all previous
+ * bytes of that sequence would get BN.
+ *
+ * It is not possible to assign all those parts of a character the same real
+ * property because this would fail in the resolution of weak types with rules
+ * that look at immediately surrounding types.
+ *
+ * As a related topic, this implementation does not remove Boundary Neutral
+ * types from the input, but ignores them wherever this is relevant.
+ * For example, the loop for the resolution of the weak types reads
+ * types until it finds a non-BN.
+ * Also, explicit embedding codes are neither changed into BN nor removed.
+ * They are only treated the same way real BNs are.
+ * As stated before, adjustWSLevels() takes care of them at the end.
+ * For the purpose of conformance, the levels of all these codes
+ * do not matter.
+ *
+ * Note that this implementation modifies the dirProps
+ * after the initial setup, when applying X5c (replace FSI by LRI or RLI),
+ * X6, N0 (replace paired brackets by L or R).
+ *
+ * In this implementation, the resolution of weak types (W1 to W6),
+ * neutrals (N1 and N2), and the assignment of the resolved level (In)
+ * are all done in one single loop, in resolveImplicitLevels().
+ * Changes of dirProp values are done on the fly, without writing
+ * them back to the dirProps array.
+ *
+ *
+ * This implementation contains code that allows to bypass steps of the
+ * algorithm that are not needed on the specific paragraph
+ * in order to speed up the most common cases considerably,
+ * like text that is entirely LTR, or RTL text without numbers.
+ *
+ * Most of this is done by setting a bit for each directional property
+ * in a flags variable and later checking for whether there are
+ * any LTR characters or any RTL characters, or both, whether
+ * there are any explicit embedding codes, etc.
+ *
+ * If the (Xn) steps are performed, then the flags are re-evaluated,
+ * because they will then not contain the embedding codes any more
+ * and will be adjusted for override codes, so that subsequently
+ * more bypassing may be possible than what the initial flags suggested.
+ *
+ * If the text is not mixed-directional, then the
+ * algorithm steps for the weak type resolution are not performed,
+ * and all levels are set to the paragraph level.
+ *
+ * If there are no explicit embedding codes, then the (Xn) steps
+ * are not performed.
+ *
+ * If embedding levels are supplied as a parameter, then all
+ * explicit embedding codes are ignored, and the (Xn) steps
+ * are not performed.
+ *
+ * White Space types could get the level of the run they belong to,
+ * and are checked with a test of (flags&MASK_EMBEDDING) to
+ * consider if the paragraph direction should be considered in
+ * the flags variable.
+ *
+ * If there are no White Space types in the paragraph, then
+ * (L1) is not necessary in adjustWSLevels().
+ */
+
+// Original filename in ICU4J: Bidi.java
+public class BidiBase {
+
+    static class Point {
+        int pos;    /* position in text */
+        int flag;   /* flag for LRM/RLM, before/after */
+    }
+
+    static class InsertPoints {
+        int size;
+        int confirmed;
+        Point[] points = new Point[0];
+    }
+
+    static class Opening {
+        int   position;                 /* position of opening bracket */
+        int   match;                    /* matching char or -position of closing bracket */
+        int   contextPos;               /* position of last strong char found before opening */
+        short flags;                    /* bits for L or R/AL found within the pair */
+        byte  contextDir;               /* L or R according to last strong char before opening */
+    }
+
+    static class IsoRun {
+        int   contextPos;               /* position of char determining context */
+        short start;                    /* index of first opening entry for this run */
+        short limit;                    /* index after last opening entry for this run */
+        byte  level;                    /* level of this run */
+        byte  lastStrong;               /* bidi class of last strong char found in this run */
+        byte  lastBase;                 /* bidi class of last base char found in this run */
+        byte  contextDir;               /* L or R to use as context for following openings */
+    }
+
+    static class BracketData {
+        Opening[] openings = new Opening[SIMPLE_PARAS_COUNT];
+        int   isoRunLast;               /* index of last used entry */
+        /* array of nested isolated sequence entries; can never excess UBIDI_MAX_EXPLICIT_LEVEL
+           + 1 for index 0, + 1 for before the first isolated sequence */
+        IsoRun[]  isoRuns = new IsoRun[MAX_EXPLICIT_LEVEL+2];
+        boolean   isNumbersSpecial;     /*reordering mode for NUMBERS_SPECIAL */
+    }
+
+    static class Isolate {
+        int   startON;
+        int   start1;
+        short stateImp;
+        short state;
+    }
+
+    /** Paragraph level setting<p>
+     *
+     * Constant indicating that the base direction depends on the first strong
+     * directional character in the text according to the Unicode Bidirectional
+     * Algorithm. If no strong directional character is present,
+     * then set the paragraph level to 0 (left-to-right).<p>
+     *
+     * If this value is used in conjunction with reordering modes
+     * <code>REORDER_INVERSE_LIKE_DIRECT</code> or
+     * <code>REORDER_INVERSE_FOR_NUMBERS_SPECIAL</code>, the text to reorder
+     * is assumed to be visual LTR, and the text after reordering is required
+     * to be the corresponding logical string with appropriate contextual
+     * direction. The direction of the result string will be RTL if either
+     * the rightmost or leftmost strong character of the source text is RTL
+     * or Arabic Letter, the direction will be LTR otherwise.<p>
+     *
+     * If reordering option <code>OPTION_INSERT_MARKS</code> is set, an RLM may
+     * be added at the beginning of the result string to ensure round trip
+     * (that the result string, when reordered back to visual, will produce
+     * the original source text).
+     * @see #REORDER_INVERSE_LIKE_DIRECT
+     * @see #REORDER_INVERSE_FOR_NUMBERS_SPECIAL
+     * @stable ICU 3.8
+     */
+    public static final byte LEVEL_DEFAULT_LTR = (byte)0x7e;
+
+    /** Paragraph level setting<p>
+     *
+     * Constant indicating that the base direction depends on the first strong
+     * directional character in the text according to the Unicode Bidirectional
+     * Algorithm. If no strong directional character is present,
+     * then set the paragraph level to 1 (right-to-left).<p>
+     *
+     * If this value is used in conjunction with reordering modes
+     * <code>REORDER_INVERSE_LIKE_DIRECT</code> or
+     * <code>REORDER_INVERSE_FOR_NUMBERS_SPECIAL</code>, the text to reorder
+     * is assumed to be visual LTR, and the text after reordering is required
+     * to be the corresponding logical string with appropriate contextual
+     * direction. The direction of the result string will be RTL if either
+     * the rightmost or leftmost strong character of the source text is RTL
+     * or Arabic Letter, or if the text contains no strong character;
+     * the direction will be LTR otherwise.<p>
+     *
+     * If reordering option <code>OPTION_INSERT_MARKS</code> is set, an RLM may
+     * be added at the beginning of the result string to ensure round trip
+     * (that the result string, when reordered back to visual, will produce
+     * the original source text).
+     * @see #REORDER_INVERSE_LIKE_DIRECT
+     * @see #REORDER_INVERSE_FOR_NUMBERS_SPECIAL
+     * @stable ICU 3.8
+     */
+    public static final byte LEVEL_DEFAULT_RTL = (byte)0x7f;
+
+    /**
+     * Maximum explicit embedding level.
+     * (The maximum resolved level can be up to <code>MAX_EXPLICIT_LEVEL+1</code>).
+     * @stable ICU 3.8
+     */
+    public static final byte MAX_EXPLICIT_LEVEL = 125;
+
+    /**
+     * Bit flag for level input.
+     * Overrides directional properties.
+     * @stable ICU 3.8
+     */
+    public static final byte LEVEL_OVERRIDE = (byte)0x80;
+
+    /**
+     * Special value which can be returned by the mapping methods when a
+     * logical index has no corresponding visual index or vice-versa. This may
+     * happen for the logical-to-visual mapping of a Bidi control when option
+     * <code>OPTION_REMOVE_CONTROLS</code> is
+     * specified. This can also happen for the visual-to-logical mapping of a
+     * Bidi mark (LRM or RLM) inserted by option
+     * <code>OPTION_INSERT_MARKS</code>.
+     * @see #getVisualIndex
+     * @see #getVisualMap
+     * @see #getLogicalIndex
+     * @see #getLogicalMap
+     * @see #OPTION_INSERT_MARKS
+     * @see #OPTION_REMOVE_CONTROLS
+     * @stable ICU 3.8
+     */
+    public static final int MAP_NOWHERE = -1;
+
+    /**
+     * Left-to-right text.
+     * <ul>
+     * <li>As return value for <code>getDirection()</code>, it means
+     *     that the source string contains no right-to-left characters, or
+     *     that the source string is empty and the paragraph level is even.
+     * <li>As return value for <code>getBaseDirection()</code>, it
+     *     means that the first strong character of the source string has
+     *     a left-to-right direction.
+     * </ul>
+     * @stable ICU 3.8
+     */
+    public static final byte LTR = 0;
+
+    /**
+     * Right-to-left text.
+     * <ul>
+     * <li>As return value for <code>getDirection()</code>, it means
+     *     that the source string contains no left-to-right characters, or
+     *     that the source string is empty and the paragraph level is odd.
+     * <li>As return value for <code>getBaseDirection()</code>, it
+     *     means that the first strong character of the source string has
+     *     a right-to-left direction.
+     * </ul>
+     * @stable ICU 3.8
+     */
+    public static final byte RTL = 1;
+
+    /**
+     * Mixed-directional text.
+     * <p>As return value for <code>getDirection()</code>, it means
+     *    that the source string contains both left-to-right and
+     *    right-to-left characters.
+     * @stable ICU 3.8
+     */
+    public static final byte MIXED = 2;
+
+    /**
+     * option bit for writeReordered():
+     * keep combining characters after their base characters in RTL runs
+     *
+     * @see #writeReordered
+     * @stable ICU 3.8
+     */
+    public static final short KEEP_BASE_COMBINING = 1;
+
+    /**
+     * option bit for writeReordered():
+     * replace characters with the "mirrored" property in RTL runs
+     * by their mirror-image mappings
+     *
+     * @see #writeReordered
+     * @stable ICU 3.8
+     */
+    public static final short DO_MIRRORING = 2;
+
+    /**
+     * option bit for writeReordered():
+     * surround the run with LRMs if necessary;
+     * this is part of the approximate "inverse Bidi" algorithm
+     *
+     * <p>This option does not imply corresponding adjustment of the index
+     * mappings.</p>
+     *
+     * @see #setInverse
+     * @see #writeReordered
+     * @stable ICU 3.8
+     */
+    public static final short INSERT_LRM_FOR_NUMERIC = 4;
+
+    /**
+     * option bit for writeReordered():
+     * remove Bidi control characters
+     * (this does not affect INSERT_LRM_FOR_NUMERIC)
+     *
+     * <p>This option does not imply corresponding adjustment of the index
+     * mappings.</p>
+     *
+     * @see #writeReordered
+     * @see #INSERT_LRM_FOR_NUMERIC
+     * @stable ICU 3.8
+     */
+    public static final short REMOVE_BIDI_CONTROLS = 8;
+
+    /**
+     * option bit for writeReordered():
+     * write the output in reverse order
+     *
+     * <p>This has the same effect as calling <code>writeReordered()</code>
+     * first without this option, and then calling
+     * <code>writeReverse()</code> without mirroring.
+     * Doing this in the same step is faster and avoids a temporary buffer.
+     * An example for using this option is output to a character terminal that
+     * is designed for RTL scripts and stores text in reverse order.</p>
+     *
+     * @see #writeReordered
+     * @stable ICU 3.8
+     */
+    public static final short OUTPUT_REVERSE = 16;
+
+    /** Reordering mode: Regular Logical to Visual Bidi algorithm according to Unicode.
+     * @see #setReorderingMode
+     * @stable ICU 3.8
+     */
+    private static final short REORDER_DEFAULT = 0;
+
+    /** Reordering mode: Logical to Visual algorithm which handles numbers in
+     * a way which mimicks the behavior of Windows XP.
+     * @see #setReorderingMode
+     * @stable ICU 3.8
+     */
+    private static final short REORDER_NUMBERS_SPECIAL = 1;
+
+    /** Reordering mode: Logical to Visual algorithm grouping numbers with
+     * adjacent R characters (reversible algorithm).
+     * @see #setReorderingMode
+     * @stable ICU 3.8
+     */
+    private static final short REORDER_GROUP_NUMBERS_WITH_R = 2;
+
+    /** Reordering mode: Reorder runs only to transform a Logical LTR string
+     * to the logical RTL string with the same display, or vice-versa.<br>
+     * If this mode is set together with option
+     * <code>OPTION_INSERT_MARKS</code>, some Bidi controls in the source
+     * text may be removed and other controls may be added to produce the
+     * minimum combination which has the required display.
+     * @see #OPTION_INSERT_MARKS
+     * @see #setReorderingMode
+     * @stable ICU 3.8
+     */
+    static final short REORDER_RUNS_ONLY = 3;
+
+    /** Reordering mode: Visual to Logical algorithm which handles numbers
+     * like L (same algorithm as selected by <code>setInverse(true)</code>.
+     * @see #setInverse
+     * @see #setReorderingMode
+     * @stable ICU 3.8
+     */
+    static final short REORDER_INVERSE_NUMBERS_AS_L = 4;
+
+    /** Reordering mode: Visual to Logical algorithm equivalent to the regular
+     * Logical to Visual algorithm.
+     * @see #setReorderingMode
+     * @stable ICU 3.8
+     */
+    static final short REORDER_INVERSE_LIKE_DIRECT = 5;
+
+    /** Reordering mode: Inverse Bidi (Visual to Logical) algorithm for the
+     * <code>REORDER_NUMBERS_SPECIAL</code> Bidi algorithm.
+     * @see #setReorderingMode
+     * @stable ICU 3.8
+     */
+    static final short REORDER_INVERSE_FOR_NUMBERS_SPECIAL = 6;
+
+    /* Reordering mode values must be ordered so that all the regular logical to
+     * visual modes come first, and all inverse Bidi modes come last.
+     */
+    private static final short REORDER_LAST_LOGICAL_TO_VISUAL =
+            REORDER_NUMBERS_SPECIAL;
+
+    /**
+     * Option bit for <code>setReorderingOptions</code>:
+     * insert Bidi marks (LRM or RLM) when needed to ensure correct result of
+     * a reordering to a Logical order
+     *
+     * <p>This option must be set or reset before calling
+     * <code>setPara</code>.</p>
+     *
+     * <p>This option is significant only with reordering modes which generate
+     * a result with Logical order, specifically.</p>
+     * <ul>
+     *   <li><code>REORDER_RUNS_ONLY</code></li>
+     *   <li><code>REORDER_INVERSE_NUMBERS_AS_L</code></li>
+     *   <li><code>REORDER_INVERSE_LIKE_DIRECT</code></li>
+     *   <li><code>REORDER_INVERSE_FOR_NUMBERS_SPECIAL</code></li>
+     * </ul>
+     *
+     * <p>If this option is set in conjunction with reordering mode
+     * <code>REORDER_INVERSE_NUMBERS_AS_L</code> or with calling
+     * <code>setInverse(true)</code>, it implies option
+     * <code>INSERT_LRM_FOR_NUMERIC</code> in calls to method
+     * <code>writeReordered()</code>.</p>
+     *
+     * <p>For other reordering modes, a minimum number of LRM or RLM characters
+     * will be added to the source text after reordering it so as to ensure
+     * round trip, i.e. when applying the inverse reordering mode on the
+     * resulting logical text with removal of Bidi marks
+     * (option <code>OPTION_REMOVE_CONTROLS</code> set before calling
+     * <code>setPara()</code> or option
+     * <code>REMOVE_BIDI_CONTROLS</code> in
+     * <code>writeReordered</code>), the result will be identical to the
+     * source text in the first transformation.
+     *
+     * <p>This option will be ignored if specified together with option
+     * <code>OPTION_REMOVE_CONTROLS</code>. It inhibits option
+     * <code>REMOVE_BIDI_CONTROLS</code> in calls to method
+     * <code>writeReordered()</code> and it implies option
+     * <code>INSERT_LRM_FOR_NUMERIC</code> in calls to method
+     * <code>writeReordered()</code> if the reordering mode is
+     * <code>REORDER_INVERSE_NUMBERS_AS_L</code>.</p>
+     *
+     * @see #setReorderingMode
+     * @see #setReorderingOptions
+     * @see #INSERT_LRM_FOR_NUMERIC
+     * @see #REMOVE_BIDI_CONTROLS
+     * @see #OPTION_REMOVE_CONTROLS
+     * @see #REORDER_RUNS_ONLY
+     * @see #REORDER_INVERSE_NUMBERS_AS_L
+     * @see #REORDER_INVERSE_LIKE_DIRECT
+     * @see #REORDER_INVERSE_FOR_NUMBERS_SPECIAL
+     * @stable ICU 3.8
+     */
+    static final int OPTION_INSERT_MARKS = 1;
+
+    /**
+     * Option bit for <code>setReorderingOptions</code>:
+     * remove Bidi control characters
+     *
+     * <p>This option must be set or reset before calling
+     * <code>setPara</code>.</p>
+     *
+     * <p>This option nullifies option
+     * <code>OPTION_INSERT_MARKS</code>. It inhibits option
+     * <code>INSERT_LRM_FOR_NUMERIC</code> in calls to method
+     * <code>writeReordered()</code> and it implies option
+     * <code>REMOVE_BIDI_CONTROLS</code> in calls to that method.</p>
+     *
+     * @see #setReorderingMode
+     * @see #setReorderingOptions
+     * @see #OPTION_INSERT_MARKS
+     * @see #INSERT_LRM_FOR_NUMERIC
+     * @see #REMOVE_BIDI_CONTROLS
+     * @stable ICU 3.8
+     */
+    static final int OPTION_REMOVE_CONTROLS = 2;
+
+    /**
+     * Option bit for <code>setReorderingOptions</code>:
+     * process the output as part of a stream to be continued
+     *
+     * <p>This option must be set or reset before calling
+     * <code>setPara</code>.</p>
+     *
+     * <p>This option specifies that the caller is interested in processing
+     * large text object in parts. The results of the successive calls are
+     * expected to be concatenated by the caller. Only the call for the last
+     * part will have this option bit off.</p>
+     *
+     * <p>When this option bit is on, <code>setPara()</code> may process
+     * less than the full source text in order to truncate the text at a
+     * meaningful boundary. The caller should call
+     * <code>getProcessedLength()</code> immediately after calling
+     * <code>setPara()</code> in order to determine how much of the source
+     * text has been processed. Source text beyond that length should be
+     * resubmitted in following calls to <code>setPara</code>. The
+     * processed length may be less than the length of the source text if a
+     * character preceding the last character of the source text constitutes a
+     * reasonable boundary (like a block separator) for text to be continued.<br>
+     * If the last character of the source text constitutes a reasonable
+     * boundary, the whole text will be processed at once.<br>
+     * If nowhere in the source text there exists
+     * such a reasonable boundary, the processed length will be zero.<br>
+     * The caller should check for such an occurrence and do one of the following:
+     * <ul><li>submit a larger amount of text with a better chance to include
+     *         a reasonable boundary.</li>
+     *     <li>resubmit the same text after turning off option
+     *         <code>OPTION_STREAMING</code>.</li></ul>
+     * In all cases, this option should be turned off before processing the last
+     * part of the text.</p>
+     *
+     * <p>When the <code>OPTION_STREAMING</code> option is used, it is
+     * recommended to call <code>orderParagraphsLTR(true)</code> before calling
+     * <code>setPara()</code> so that later paragraphs may be concatenated to
+     * previous paragraphs on the right.
+     * </p>
+     *
+     * @see #setReorderingMode
+     * @see #setReorderingOptions
+     * @see #getProcessedLength
+     * @stable ICU 3.8
+     */
+    private static final int OPTION_STREAMING = 4;
+
+    /*
+     *   Comparing the description of the Bidi algorithm with this implementation
+     *   is easier with the same names for the Bidi types in the code as there.
+     *   See UCharacterDirection
+     */
+    /* private */ static final byte L   = 0;
+    private static final byte R   = 1;
+    private static final byte EN  = 2;
+    private static final byte ES  = 3;
+    private static final byte ET  = 4;
+    private static final byte AN  = 5;
+    private static final byte CS  = 6;
+    static final byte B   = 7;
+    private static final byte S   = 8;
+    private static final byte WS  = 9;
+    private static final byte ON  = 10;
+    private static final byte LRE = 11;
+    private static final byte LRO = 12;
+    private static final byte AL  = 13;
+    private static final byte RLE = 14;
+    private static final byte RLO = 15;
+    private static final byte PDF = 16;
+    private static final byte NSM = 17;
+    private static final byte BN  = 18;
+    private static final byte FSI = 19;
+    private static final byte LRI = 20;
+    private static final byte RLI = 21;
+    private static final byte PDI = 22;
+    private static final byte ENL = PDI + 1;    /* EN after W7 */
+    private static final byte ENR = ENL + 1;    /* EN not subject to W7 */
+
+    // Number of directional types
+    private static final int CHAR_DIRECTION_COUNT       = 23;
+
+    /**
+     * Enumerated property Bidi_Paired_Bracket_Type (new in Unicode 6.3).
+     * Used in
+     * <a href="https://www.unicode.org/reports/tr9/">Unicode Standard Annex #9:
+     * Unicode Bidirectional Algorithm</a>.
+     * Returns UCharacter.BidiPairedBracketType values.
+     * @stable ICU 52
+     */
+    public static final int BIDI_PAIRED_BRACKET_TYPE = 0x1015;
+
+    /**
+     * Bidi Paired Bracket Type constants.
+     *
+     * @see UProperty#BIDI_PAIRED_BRACKET_TYPE
+     * @stable ICU 52
+     */
+    public static interface BidiPairedBracketType {
+        /**
+         * Not a paired bracket.
+         * @stable ICU 52
+         */
+        public static final int NONE = 0;
+        /**
+         * Open paired bracket.
+         * @stable ICU 52
+         */
+        public static final int OPEN = 1;
+        /**
+         * Close paired bracket.
+         * @stable ICU 52
+         */
+        public static final int CLOSE = 2;
+        /**
+         * @stable ICU 52
+         */
+        public static final int COUNT = 3;
+    }
+
+    /* number of paras entries allocated initially */
+    static final int SIMPLE_PARAS_COUNT = 10;
+
+    private static final char CR = '\r';
+    private static final char LF = '\n';
+
+    static final int LRM_BEFORE = 1;
+    static final int LRM_AFTER = 2;
+    static final int RLM_BEFORE = 4;
+    static final int RLM_AFTER = 8;
+
+    /* flags for Opening.flags */
+    static final byte FOUND_L = (byte)DirPropFlag(L);
+    static final byte FOUND_R = (byte)DirPropFlag(R);
+
+    /*
+     * The following bit is used for the directional isolate status.
+     * Stack entries corresponding to isolate sequences are greater than ISOLATE.
+     */
+    static final int ISOLATE = 0x0100;
+
+    /*
+     * reference to parent paragraph object (reference to self if this object is
+     * a paragraph object); set to null in a newly opened object; set to a
+     * real value after a successful execution of setPara or setLine
+     */
+    BidiBase            paraBidi;
+
+    final UBiDiProps    bdp;
+
+    /* character array representing the current text */
+    char[]              text;
+
+    /* length of the current text */
+    int                 originalLength;
+
+    /* if the option OPTION_STREAMING is set, this is the length of
+     * text actually processed by <code>setPara</code>, which may be shorter
+     * than the original length. Otherwise, it is identical to the original
+     * length.
+     */
+    public int                 length;
+
+    /* if option OPTION_REMOVE_CONTROLS is set, and/or Bidi
+     * marks are allowed to be inserted in one of the reordering modes, the
+     * length of the result string may be different from the processed length.
+     */
+    int                 resultLength;
+
+    /* indicators for whether memory may be allocated after construction */
+    boolean             mayAllocateText;
+    boolean             mayAllocateRuns;
+
+    /* arrays with one value per text-character */
+    byte[]              dirPropsMemory = new byte[1];
+    byte[]              levelsMemory = new byte[1];
+    byte[]              dirProps;
+    byte[]              levels;
+
+    /* are we performing an approximation of the "inverse Bidi" algorithm? */
+    boolean             isInverse;
+
+    /* are we using the basic algorithm or its variation? */
+    int                 reorderingMode;
+
+    /* bitmask for reordering options */
+    int                 reorderingOptions;
+
+    /* must block separators receive level 0? */
+    boolean             orderParagraphsLTR;
+
+    /* the paragraph level */
+    byte                paraLevel;
+
+    /* original paraLevel when contextual */
+    /* must be one of DEFAULT_xxx or 0 if not contextual */
+    byte                defaultParaLevel;
+
+    /* the following is set in setPara, used in processPropertySeq */
+
+    ImpTabPair          impTabPair;  /* reference to levels state table pair */
+
+    /* the overall paragraph or line directionality*/
+    byte                direction;
+
+    /* flags is a bit set for which directional properties are in the text */
+    int                 flags;
+
+    /* lastArabicPos is index to the last AL in the text, -1 if none */
+    int                 lastArabicPos;
+
+    /* characters after trailingWSStart are WS and are */
+    /* implicitly at the paraLevel (rule (L1)) - levels may not reflect that */
+    int                 trailingWSStart;
+
+    /* fields for paragraph handling, set in getDirProps() */
+    int                 paraCount;
+    int[]               paras_limit = new int[SIMPLE_PARAS_COUNT];
+    byte[]              paras_level = new byte[SIMPLE_PARAS_COUNT];
+
+    /* fields for line reordering */
+    int                 runCount;     /* ==-1: runs not set up yet */
+    BidiRun[]           runsMemory = new BidiRun[0];
+    BidiRun[]           runs;
+
+    /* for non-mixed text, we only need a tiny array of runs (no allocation) */
+    BidiRun[]           simpleRuns = {new BidiRun()};
+
+    /* fields for managing isolate sequences */
+    Isolate[]           isolates;
+
+    /* maximum or current nesting depth of isolate sequences */
+    /* Within resolveExplicitLevels() and checkExplicitLevels(), this is the maximal
+       nesting encountered.
+       Within resolveImplicitLevels(), this is the index of the current isolates
+       stack entry. */
+    int                 isolateCount;
+
+    /* mapping of runs in logical order to visual order */
+    int[]               logicalToVisualRunsMap;
+    /* flag to indicate that the map has been updated */
+    boolean             isGoodLogicalToVisualRunsMap;
+
+    /* for inverse Bidi with insertion of directional marks */
+    InsertPoints        insertPoints = new InsertPoints();
+
+    /* for option OPTION_REMOVE_CONTROLS */
+    int                 controlCount;
+
+    /*
+     * Sometimes, bit values are more appropriate
+     * to deal with directionality properties.
+     * Abbreviations in these method names refer to names
+     * used in the Bidi algorithm.
+     */
+    static int DirPropFlag(byte dir) {
+        return (1 << dir);
+    }
+
+    boolean testDirPropFlagAt(int flag, int index) {
+        return ((DirPropFlag(dirProps[index]) & flag) != 0);
+    }
+
+    static final int DirPropFlagMultiRuns = DirPropFlag((byte)31);
+
+    /* to avoid some conditional statements, use tiny constant arrays */
+    static final int DirPropFlagLR[] = { DirPropFlag(L), DirPropFlag(R) };
+    static final int DirPropFlagE[] = { DirPropFlag(LRE), DirPropFlag(RLE) };
+    static final int DirPropFlagO[] = { DirPropFlag(LRO), DirPropFlag(RLO) };
+
+    static final int DirPropFlagLR(byte level) { return DirPropFlagLR[level & 1]; }
+    static final int DirPropFlagE(byte level)  { return DirPropFlagE[level & 1]; }
+    static final int DirPropFlagO(byte level)  { return DirPropFlagO[level & 1]; }
+    static final byte DirFromStrong(byte strong) { return strong == L ? L : R; }
+    static final byte NoOverride(byte level) { return (byte)(level & ~LEVEL_OVERRIDE); }
+
+    /*  are there any characters that are LTR or RTL? */
+    static final int MASK_LTR =
+        DirPropFlag(L)|DirPropFlag(EN)|DirPropFlag(ENL)|DirPropFlag(ENR)|DirPropFlag(AN)|DirPropFlag(LRE)|DirPropFlag(LRO)|DirPropFlag(LRI);
+    static final int MASK_RTL = DirPropFlag(R)|DirPropFlag(AL)|DirPropFlag(RLE)|DirPropFlag(RLO)|DirPropFlag(RLI);
+
+    static final int MASK_R_AL = DirPropFlag(R)|DirPropFlag(AL);
+
+    /* explicit embedding codes */
+    private static final int MASK_EXPLICIT = DirPropFlag(LRE)|DirPropFlag(LRO)|DirPropFlag(RLE)|DirPropFlag(RLO)|DirPropFlag(PDF);
+    private static final int MASK_BN_EXPLICIT = DirPropFlag(BN)|MASK_EXPLICIT;
+
+    /* explicit isolate codes */
+    private static final int MASK_ISO = DirPropFlag(LRI)|DirPropFlag(RLI)|DirPropFlag(FSI)|DirPropFlag(PDI);
+
+    /* paragraph and segment separators */
+    private static final int MASK_B_S = DirPropFlag(B)|DirPropFlag(S);
+
+    /* all types that are counted as White Space or Neutral in some steps */
+    static final int MASK_WS = MASK_B_S|DirPropFlag(WS)|MASK_BN_EXPLICIT|MASK_ISO;
+
+    /* types that are neutrals or could becomes neutrals in (Wn) */
+    private static final int MASK_POSSIBLE_N = DirPropFlag(ON)|DirPropFlag(CS)|DirPropFlag(ES)|DirPropFlag(ET)|MASK_WS;
+
+    /*
+     * These types may be changed to "e",
+     * the embedding type (L or R) of the run,
+     * in the Bidi algorithm (N2)
+     */
+    private static final int MASK_EMBEDDING = DirPropFlag(NSM)|MASK_POSSIBLE_N;
+
+    /*
+     *  the dirProp's L and R are defined to 0 and 1 values in UCharacterDirection.java
+     */
+    private static byte GetLRFromLevel(byte level)
+    {
+        return (byte)(level & 1);
+    }
+
+    private static boolean IsDefaultLevel(byte level)
+    {
+        return ((level & LEVEL_DEFAULT_LTR) == LEVEL_DEFAULT_LTR);
+    }
+
+    static boolean IsBidiControlChar(int c)
+    {
+        /* check for range 0x200c to 0x200f (ZWNJ, ZWJ, LRM, RLM) or
+                           0x202a to 0x202e (LRE, RLE, PDF, LRO, RLO) */
+        return (((c & 0xfffffffc) == 0x200c) || ((c >= 0x202a) && (c <= 0x202e))
+                                             || ((c >= 0x2066) && (c <= 0x2069)));
+    }
+
+    void verifyValidPara()
+    {
+        if (!(this == this.paraBidi)) {
+            throw new IllegalStateException();
+        }
+    }
+
+    void verifyValidParaOrLine()
+    {
+        BidiBase para = this.paraBidi;
+        /* verify Para */
+        if (this == para) {
+            return;
+        }
+        /* verify Line */
+        if ((para == null) || (para != para.paraBidi)) {
+            throw new IllegalStateException();
+        }
+    }
+
+    void verifyRange(int index, int start, int limit)
+    {
+        if (index < start || index >= limit) {
+            throw new IllegalArgumentException("Value " + index +
+                      " is out of range " + start + " to " + limit);
+        }
+    }
+
+    /**
+     * Allocate a <code>Bidi</code> object with preallocated memory
+     * for internal structures.
+     * This method provides a <code>Bidi</code> object like the default constructor
+     * but it also preallocates memory for internal structures
+     * according to the sizings supplied by the caller.<p>
+     * The preallocation can be limited to some of the internal memory
+     * by setting some values to 0 here. That means that if, e.g.,
+     * <code>maxRunCount</code> cannot be reasonably predetermined and should not
+     * be set to <code>maxLength</code> (the only failproof value) to avoid
+     * wasting  memory, then <code>maxRunCount</code> could be set to 0 here
+     * and the internal structures that are associated with it will be allocated
+     * on demand, just like with the default constructor.
+     *
+     * @param maxLength is the maximum text or line length that internal memory
+     *        will be preallocated for. An attempt to associate this object with a
+     *        longer text will fail, unless this value is 0, which leaves the allocation
+     *        up to the implementation.
+     *
+     * @param maxRunCount is the maximum anticipated number of same-level runs
+     *        that internal memory will be preallocated for. An attempt to access
+     *        visual runs on an object that was not preallocated for as many runs
+     *        as the text was actually resolved to will fail,
+     *        unless this value is 0, which leaves the allocation up to the implementation.<br><br>
+     *        The number of runs depends on the actual text and maybe anywhere between
+     *        1 and <code>maxLength</code>. It is typically small.
+     *
+     * @throws IllegalArgumentException if maxLength or maxRunCount is less than 0
+     * @stable ICU 3.8
+     */
+    public BidiBase(int maxLength, int maxRunCount)
+    {
+        /* check the argument values */
+        if (maxLength < 0 || maxRunCount < 0) {
+            throw new IllegalArgumentException();
+        }
+
+        /* reset the object, all reference variables null, all flags false,
+           all sizes 0.
+           In fact, we don't need to do anything, since class members are
+           initialized as zero when an instance is created.
+         */
+        /*
+        mayAllocateText = false;
+        mayAllocateRuns = false;
+        orderParagraphsLTR = false;
+        paraCount = 0;
+        runCount = 0;
+        trailingWSStart = 0;
+        flags = 0;
+        paraLevel = 0;
+        defaultParaLevel = 0;
+        direction = 0;
+        */
+        /* get Bidi properties */
+        bdp = UBiDiProps.INSTANCE;
+
+        /* allocate memory for arrays as requested */
+        if (maxLength > 0) {
+            getInitialDirPropsMemory(maxLength);
+            getInitialLevelsMemory(maxLength);
+        } else {
+            mayAllocateText = true;
+        }
+
+        if (maxRunCount > 0) {
+            // if maxRunCount == 1, use simpleRuns[]
+            if (maxRunCount > 1) {
+                getInitialRunsMemory(maxRunCount);
+            }
+        } else {
+            mayAllocateRuns = true;
+        }
+    }
+
+    /*
+     * We are allowed to allocate memory if object==null or
+     * mayAllocate==true for each array that we need.
+     *
+     * Assume sizeNeeded>0.
+     * If object != null, then assume size > 0.
+     */
+    private Object getMemory(String label, Object array, Class<?> arrayClass,
+            boolean mayAllocate, int sizeNeeded)
+    {
+        int len = Array.getLength(array);
+
+        /* we have at least enough memory and must not allocate */
+        if (sizeNeeded == len) {
+            return array;
+        }
+        if (!mayAllocate) {
+            /* we must not allocate */
+            if (sizeNeeded <= len) {
+                return array;
+            }
+            throw new OutOfMemoryError("Failed to allocate memory for "
+                                       + label);
+        }
+        /* we may try to grow or shrink */
+        /* FOOD FOR THOUGHT: when shrinking it should be possible to avoid
+           the allocation altogether and rely on this.length */
+        try {
+            return Array.newInstance(arrayClass, sizeNeeded);
+        } catch (Exception e) {
+            throw new OutOfMemoryError("Failed to allocate memory for "
+                                       + label);
+        }
+    }
+
+    /* helper methods for each allocated array */
+    private void getDirPropsMemory(boolean mayAllocate, int len)
+    {
+        Object array = getMemory("DirProps", dirPropsMemory, Byte.TYPE, mayAllocate, len);
+        dirPropsMemory = (byte[]) array;
+    }
+
+    void getDirPropsMemory(int len)
+    {
+        getDirPropsMemory(mayAllocateText, len);
+    }
+
+    private void getLevelsMemory(boolean mayAllocate, int len)
+    {
+        Object array = getMemory("Levels", levelsMemory, Byte.TYPE, mayAllocate, len);
+        levelsMemory = (byte[]) array;
+    }
+
+    void getLevelsMemory(int len)
+    {
+        getLevelsMemory(mayAllocateText, len);
+    }
+
+    private void getRunsMemory(boolean mayAllocate, int len)
+    {
+        Object array = getMemory("Runs", runsMemory, BidiRun.class, mayAllocate, len);
+        runsMemory = (BidiRun[]) array;
+    }
+
+    void getRunsMemory(int len)
+    {
+        getRunsMemory(mayAllocateRuns, len);
+    }
+
+    /* additional methods used by constructor - always allow allocation */
+    private void getInitialDirPropsMemory(int len)
+    {
+        getDirPropsMemory(true, len);
+    }
+
+    private void getInitialLevelsMemory(int len)
+    {
+        getLevelsMemory(true, len);
+    }
+
+    private void getInitialRunsMemory(int len)
+    {
+        getRunsMemory(true, len);
+    }
+
+    /**
+     * Is this <code>Bidi</code> object set to perform the inverse Bidi
+     * algorithm?
+     * <p>Note: calling this method after setting the reordering mode with
+     * <code>setReorderingMode</code> will return <code>true</code> if the
+     * reordering mode was set to
+     * <code>REORDER_INVERSE_NUMBERS_AS_L</code>, <code>false</code>
+     * for all other values.</p>
+     *
+     * @return <code>true</code> if the <code>Bidi</code> object is set to
+     * perform the inverse Bidi algorithm by handling numbers as L.
+     *
+     * @see #setInverse
+     * @see #setReorderingMode
+     * @see #REORDER_INVERSE_NUMBERS_AS_L
+     * @stable ICU 3.8
+     */
+    public boolean isInverse() {
+        return isInverse;
+    }
+
+    /* perform (P2)..(P3) ------------------------------------------------------- */
+
+    /*
+     * Check that there are enough entries in the arrays paras_limit and paras_level
+     */
+    private void checkParaCount() {
+        int[] saveLimits;
+        byte[] saveLevels;
+        int count = paraCount;
+        if (count <= paras_level.length)
+            return;
+        int oldLength = paras_level.length;
+        saveLimits = paras_limit;
+        saveLevels = paras_level;
+        try {
+            paras_limit = new int[count * 2];
+            paras_level = new byte[count * 2];
+        } catch (Exception e) {
+            throw new OutOfMemoryError("Failed to allocate memory for paras");
+        }
+        System.arraycopy(saveLimits, 0, paras_limit, 0, oldLength);
+        System.arraycopy(saveLevels, 0, paras_level, 0, oldLength);
+    }
+
+    /*
+     * Get the directional properties for the text, calculate the flags bit-set, and
+     * determine the paragraph level if necessary (in paras_level[i]).
+     * FSI initiators are also resolved and their dirProp replaced with LRI or RLI.
+     * When encountering an FSI, it is initially replaced with an LRI, which is the
+     * default. Only if a strong R or AL is found within its scope will the LRI be
+     * replaced by an RLI.
+     */
+    static final int NOT_SEEKING_STRONG = 0;        /* 0: not contextual paraLevel, not after FSI */
+    static final int SEEKING_STRONG_FOR_PARA = 1;   /* 1: looking for first strong char in para */
+    static final int SEEKING_STRONG_FOR_FSI = 2;    /* 2: looking for first strong after FSI */
+    static final int LOOKING_FOR_PDI = 3;           /* 3: found strong after FSI, looking for PDI */
+
+    private void getDirProps()
+    {
+        int i = 0, i0, i1;
+        flags = 0;          /* collect all directionalities in the text */
+        int uchar;
+        byte dirProp;
+        byte defaultParaLevel = 0;   /* initialize to avoid compiler warnings */
+        boolean isDefaultLevel = IsDefaultLevel(paraLevel);
+        /* for inverse Bidi, the default para level is set to RTL if there is a
+           strong R or AL character at either end of the text                */
+        boolean isDefaultLevelInverse=isDefaultLevel &&
+                (reorderingMode == REORDER_INVERSE_LIKE_DIRECT ||
+                 reorderingMode == REORDER_INVERSE_FOR_NUMBERS_SPECIAL);
+        lastArabicPos = -1;
+        int controlCount = 0;
+        boolean removeBidiControls = (reorderingOptions & OPTION_REMOVE_CONTROLS) != 0;
+
+        byte state;
+        byte lastStrong = ON;           /* for default level & inverse Bidi */
+    /* The following stacks are used to manage isolate sequences. Those
+       sequences may be nested, but obviously never more deeply than the
+       maximum explicit embedding level.
+       lastStack is the index of the last used entry in the stack. A value of -1
+       means that there is no open isolate sequence.
+       lastStack is reset to -1 on paragraph boundaries. */
+    /* The following stack contains the position of the initiator of
+       each open isolate sequence */
+        int[] isolateStartStack= new int[MAX_EXPLICIT_LEVEL+1];
+    /* The following stack contains the last known state before
+       encountering the initiator of an isolate sequence */
+        byte[] previousStateStack = new byte[MAX_EXPLICIT_LEVEL+1];
+        int  stackLast=-1;
+
+        if ((reorderingOptions & OPTION_STREAMING) != 0)
+            length = 0;
+        defaultParaLevel = (byte)(paraLevel & 1);
+
+        if (isDefaultLevel) {
+            paras_level[0] = defaultParaLevel;
+            lastStrong = defaultParaLevel;
+            state = SEEKING_STRONG_FOR_PARA;
+        } else {
+            paras_level[0] = paraLevel;
+            state = NOT_SEEKING_STRONG;
+        }
+        /* count paragraphs and determine the paragraph level (P2..P3) */
+        /*
+         * see comment on constant fields:
+         * the LEVEL_DEFAULT_XXX values are designed so that
+         * their low-order bit alone yields the intended default
+         */
+
+        for (i = 0; i < originalLength; /* i is incremented in the loop */) {
+            i0 = i;                     /* index of first code unit */
+            uchar = UTF16.charAt(text, 0, originalLength, i);
+            i += UTF16.getCharCount(uchar);
+            i1 = i - 1; /* index of last code unit, gets the directional property */
+
+            dirProp = (byte)getCustomizedClass(uchar);
+            flags |= DirPropFlag(dirProp);
+            dirProps[i1] = dirProp;
+            if (i1 > i0) {     /* set previous code units' properties to BN */
+                flags |= DirPropFlag(BN);
+                do {
+                    dirProps[--i1] = BN;
+                } while (i1 > i0);
+            }
+            if (removeBidiControls && IsBidiControlChar(uchar)) {
+                controlCount++;
+            }
+            if (dirProp == L) {
+                if (state == SEEKING_STRONG_FOR_PARA) {
+                    paras_level[paraCount - 1] = 0;
+                    state = NOT_SEEKING_STRONG;
+                }
+                else if (state == SEEKING_STRONG_FOR_FSI) {
+                    if (stackLast <= MAX_EXPLICIT_LEVEL) {
+                        /* no need for next statement, already set by default */
+                        /* dirProps[isolateStartStack[stackLast]] = LRI; */
+                        flags |= DirPropFlag(LRI);
+                    }
+                    state = LOOKING_FOR_PDI;
+                }
+                lastStrong = L;
+                continue;
+            }
+            if (dirProp == R || dirProp == AL) {
+                if (state == SEEKING_STRONG_FOR_PARA) {
+                    paras_level[paraCount - 1] = 1;
+                    state = NOT_SEEKING_STRONG;
+                }
+                else if (state == SEEKING_STRONG_FOR_FSI) {
+                    if (stackLast <= MAX_EXPLICIT_LEVEL) {
+                        dirProps[isolateStartStack[stackLast]] = RLI;
+                        flags |= DirPropFlag(RLI);
+                    }
+                    state = LOOKING_FOR_PDI;
+                }
+                lastStrong = R;
+                if (dirProp == AL)
+                    lastArabicPos = i - 1;
+                continue;
+            }
+            if (dirProp >= FSI && dirProp <= RLI) { /* FSI, LRI or RLI */
+                stackLast++;
+                if (stackLast <= MAX_EXPLICIT_LEVEL) {
+                    isolateStartStack[stackLast] = i - 1;
+                    previousStateStack[stackLast] = state;
+                }
+                if (dirProp == FSI) {
+                    dirProps[i-1] = LRI;    /* default if no strong char */
+                    state = SEEKING_STRONG_FOR_FSI;
+                }
+                else
+                    state = LOOKING_FOR_PDI;
+                continue;
+            }
+            if (dirProp == PDI) {
+                if (state == SEEKING_STRONG_FOR_FSI) {
+                    if (stackLast <= MAX_EXPLICIT_LEVEL) {
+                        /* no need for next statement, already set by default */
+                        /* dirProps[isolateStartStack[stackLast]] = LRI; */
+                        flags |= DirPropFlag(LRI);
+                    }
+                }
+                if (stackLast >= 0) {
+                    if (stackLast <= MAX_EXPLICIT_LEVEL)
+                        state = previousStateStack[stackLast];
+                    stackLast--;
+                }
+                continue;
+            }
+            if (dirProp == B) {
+                if (i < originalLength && uchar == CR && text[i] == LF) /* do nothing on the CR */
+                    continue;
+                paras_limit[paraCount - 1] = i;
+                if (isDefaultLevelInverse && lastStrong == R)
+                    paras_level[paraCount - 1] = 1;
+                if ((reorderingOptions & OPTION_STREAMING) != 0) {
+                /* When streaming, we only process whole paragraphs
+                   thus some updates are only done on paragraph boundaries */
+                   length = i;          /* i is index to next character */
+                   this.controlCount = controlCount;
+                }
+                if (i < originalLength) {       /* B not last char in text */
+                    paraCount++;
+                    checkParaCount();   /* check that there is enough memory for a new para entry */
+                    if (isDefaultLevel) {
+                        paras_level[paraCount - 1] = defaultParaLevel;
+                        state = SEEKING_STRONG_FOR_PARA;
+                        lastStrong = defaultParaLevel;
+                    } else {
+                        paras_level[paraCount - 1] = paraLevel;
+                        state = NOT_SEEKING_STRONG;
+                    }
+                    stackLast = -1;
+                }
+                continue;
+            }
+        }
+        /* +Ignore still open isolate sequences with overflow */
+      if (stackLast > MAX_EXPLICIT_LEVEL) {
+            stackLast = MAX_EXPLICIT_LEVEL;
+            state=SEEKING_STRONG_FOR_FSI;   /* to be on the safe side */
+        }
+        /* Resolve direction of still unresolved open FSI sequences */
+        while (stackLast >= 0) {
+            if (state == SEEKING_STRONG_FOR_FSI) {
+                /* no need for next statement, already set by default */
+                /* dirProps[isolateStartStack[stackLast]] = LRI; */
+                flags |= DirPropFlag(LRI);
+                break;
+            }
+            state = previousStateStack[stackLast];
+            stackLast--;
+        }
+        /* When streaming, ignore text after the last paragraph separator */
+        if ((reorderingOptions & OPTION_STREAMING) != 0) {
+            if (length < originalLength)
+                paraCount--;
+        } else {
+            paras_limit[paraCount - 1] = originalLength;
+            this.controlCount = controlCount;
+        }
+        /* For inverse bidi, default para direction is RTL if there is
+           a strong R or AL at either end of the paragraph */
+        if (isDefaultLevelInverse && lastStrong == R) {
+            paras_level[paraCount - 1] = 1;
+        }
+        if (isDefaultLevel) {
+            paraLevel = paras_level[0];
+        }
+        /* The following is needed to resolve the text direction for default level
+           paragraphs containing no strong character */
+        for (i = 0; i < paraCount; i++)
+            flags |= DirPropFlagLR(paras_level[i]);
+
+        if (orderParagraphsLTR && (flags & DirPropFlag(B)) != 0) {
+            flags |= DirPropFlag(L);
+        }
+    }
+
+    /* determine the paragraph level at position index */
+    byte GetParaLevelAt(int pindex)
+    {
+        if (defaultParaLevel == 0 || pindex < paras_limit[0])
+            return paraLevel;
+        int i;
+        for (i = 1; i < paraCount; i++)
+            if (pindex < paras_limit[i])
+                break;
+        if (i >= paraCount)
+            i = paraCount - 1;
+        return paras_level[i];
+    }
+
+    /* Functions for handling paired brackets ----------------------------------- */
+
+    /* In the isoRuns array, the first entry is used for text outside of any
+       isolate sequence.  Higher entries are used for each more deeply nested
+       isolate sequence. isoRunLast is the index of the last used entry.  The
+       openings array is used to note the data of opening brackets not yet
+       matched by a closing bracket, or matched but still susceptible to change
+       level.
+       Each isoRun entry contains the index of the first and
+       one-after-last openings entries for pending opening brackets it
+       contains.  The next openings entry to use is the one-after-last of the
+       most deeply nested isoRun entry.
+       isoRun entries also contain their current embedding level and the last
+       encountered strong character, since these will be needed to resolve
+       the level of paired brackets.  */
+
+    private void bracketInit(BracketData bd) {
+        bd.isoRunLast = 0;
+        bd.isoRuns[0] = new IsoRun();
+        bd.isoRuns[0].start = 0;
+        bd.isoRuns[0].limit = 0;
+        bd.isoRuns[0].level = GetParaLevelAt(0);
+        bd.isoRuns[0].lastStrong = bd.isoRuns[0].lastBase = bd.isoRuns[0].contextDir = (byte)(GetParaLevelAt(0) & 1);
+        bd.isoRuns[0].contextPos = 0;
+        bd.openings = new Opening[SIMPLE_PARAS_COUNT];
+        bd.isNumbersSpecial = reorderingMode == REORDER_NUMBERS_SPECIAL ||
+                              reorderingMode == REORDER_INVERSE_FOR_NUMBERS_SPECIAL;
+    }
+
+    /* paragraph boundary */
+    private void bracketProcessB(BracketData bd, byte level) {
+        bd.isoRunLast = 0;
+        bd.isoRuns[0].limit = 0;
+        bd.isoRuns[0].level = level;
+        bd.isoRuns[0].lastStrong = bd.isoRuns[0].lastBase = bd.isoRuns[0].contextDir = (byte)(level & 1);
+        bd.isoRuns[0].contextPos = 0;
+    }
+
+    /* LRE, LRO, RLE, RLO, PDF */
+    private void bracketProcessBoundary(BracketData bd, int lastCcPos,
+                                        byte contextLevel, byte embeddingLevel) {
+        IsoRun pLastIsoRun = bd.isoRuns[bd.isoRunLast];
+        if ((DirPropFlag(dirProps[lastCcPos]) & MASK_ISO) != 0) /* after an isolate */
+            return;
+        if (NoOverride(embeddingLevel) > NoOverride(contextLevel))  /* not a PDF */
+            contextLevel = embeddingLevel;
+        pLastIsoRun.limit = pLastIsoRun.start;
+        pLastIsoRun.level = embeddingLevel;
+        pLastIsoRun.lastStrong = pLastIsoRun.lastBase = pLastIsoRun.contextDir = (byte)(contextLevel & 1);
+        pLastIsoRun.contextPos = lastCcPos;
+    }
+
+    /* LRI or RLI */
+    private void bracketProcessLRI_RLI(BracketData bd, byte level) {
+        IsoRun pLastIsoRun = bd.isoRuns[bd.isoRunLast];
+        short lastLimit;
+        pLastIsoRun.lastBase = ON;
+        lastLimit = pLastIsoRun.limit;
+        bd.isoRunLast++;
+        pLastIsoRun = bd.isoRuns[bd.isoRunLast];
+        if (pLastIsoRun == null)
+            pLastIsoRun = bd.isoRuns[bd.isoRunLast] = new IsoRun();
+        pLastIsoRun.start = pLastIsoRun.limit = lastLimit;
+        pLastIsoRun.level = level;
+        pLastIsoRun.lastStrong = pLastIsoRun.lastBase = pLastIsoRun.contextDir = (byte)(level & 1);
+        pLastIsoRun.contextPos = 0;
+    }
+
+    /* PDI */
+    private void bracketProcessPDI(BracketData bd) {
+        IsoRun pLastIsoRun;
+        bd.isoRunLast--;
+        pLastIsoRun = bd.isoRuns[bd.isoRunLast];
+        pLastIsoRun.lastBase = ON;
+    }
+
+    /* newly found opening bracket: create an openings entry */
+    private void bracketAddOpening(BracketData bd, char match, int position) {
+        IsoRun pLastIsoRun = bd.isoRuns[bd.isoRunLast];
+        Opening pOpening;
+        if (pLastIsoRun.limit >= bd.openings.length) {  /* no available new entry */
+            Opening[] saveOpenings = bd.openings;
+            int count;
+            try {
+                count = bd.openings.length;
+                bd.openings = new Opening[count * 2];
+            } catch (Exception e) {
+                throw new OutOfMemoryError("Failed to allocate memory for openings");
+            }
+            System.arraycopy(saveOpenings, 0, bd.openings, 0, count);
+        }
+        pOpening = bd.openings[pLastIsoRun.limit];
+        if (pOpening == null)
+            pOpening = bd.openings[pLastIsoRun.limit]= new Opening();
+        pOpening.position = position;
+        pOpening.match = match;
+        pOpening.contextDir = pLastIsoRun.contextDir;
+        pOpening.contextPos = pLastIsoRun.contextPos;
+        pOpening.flags = 0;
+        pLastIsoRun.limit++;
+    }
+
+    /* change N0c1 to N0c2 when a preceding bracket is assigned the embedding level */
+    private void fixN0c(BracketData bd, int openingIndex, int newPropPosition, byte newProp) {
+        /* This function calls itself recursively */
+        IsoRun pLastIsoRun = bd.isoRuns[bd.isoRunLast];
+        Opening qOpening;
+        int k, openingPosition, closingPosition;
+        for (k = openingIndex+1; k < pLastIsoRun.limit; k++) {
+            qOpening = bd.openings[k];
+            if (qOpening.match >= 0)    /* not an N0c match */
+                continue;
+            if (newPropPosition < qOpening.contextPos)
+                break;
+            if (newPropPosition >= qOpening.position)
+                continue;
+            if (newProp == qOpening.contextDir)
+                break;
+            openingPosition = qOpening.position;
+            dirProps[openingPosition] = newProp;
+            closingPosition = -(qOpening.match);
+            dirProps[closingPosition] = newProp;
+            qOpening.match = 0;                                 /* prevent further changes */
+            fixN0c(bd, k, openingPosition, newProp);
+            fixN0c(bd, k, closingPosition, newProp);
+        }
+    }
+
+    /* process closing bracket; return L or R if N0b or N0c, ON if N0d */
+    private byte bracketProcessClosing(BracketData bd, int openIdx, int position) {
+        IsoRun pLastIsoRun = bd.isoRuns[bd.isoRunLast];
+        Opening pOpening, qOpening;
+        byte direction;
+        boolean stable;
+        byte newProp;
+        pOpening = bd.openings[openIdx];
+        direction = (byte)(pLastIsoRun.level & 1);
+        stable = true;          /* assume stable until proved otherwise */
+
+        /* The stable flag is set when brackets are paired and their
+           level is resolved and cannot be changed by what will be
+           found later in the source string.
+           An unstable match can occur only when applying N0c, where
+           the resolved level depends on the preceding context, and
+           this context may be affected by text occurring later.
+           Example: RTL paragraph containing:  abc[(latin) HEBREW]
+           When the closing parenthesis is encountered, it appears
+           that N0c1 must be applied since 'abc' sets an opposite
+           direction context and both parentheses receive level 2.
+           However, when the closing square bracket is processed,
+           N0b applies because of 'HEBREW' being included within the
+           brackets, thus the square brackets are treated like R and
+           receive level 1. However, this changes the preceding
+           context of the opening parenthesis, and it now appears
+           that N0c2 must be applied to the parentheses rather than
+           N0c1. */
+
+            if ((direction == 0 && (pOpening.flags & FOUND_L) > 0) ||
+                (direction == 1 && (pOpening.flags & FOUND_R) > 0)) {   /* N0b */
+                newProp = direction;
+            }
+            else if ((pOpening.flags & (FOUND_L | FOUND_R)) != 0) {     /* N0c */
+                    /* it is stable if there is no preceding text or in
+                       conditions too complicated and not worth checking */
+                    stable = (openIdx == pLastIsoRun.start);
+                if (direction != pOpening.contextDir)
+                    newProp = pOpening.contextDir;                      /* N0c1 */
+                else
+                    newProp = direction;                                /* N0c2 */
+            } else {
+            /* forget this and any brackets nested within this pair */
+            pLastIsoRun.limit = (short)openIdx;
+            return ON;                                                  /* N0d */
+        }
+        dirProps[pOpening.position] = newProp;
+        dirProps[position] = newProp;
+        /* Update nested N0c pairs that may be affected */
+        fixN0c(bd, openIdx, pOpening.position, newProp);
+        if (stable) {
+            pLastIsoRun.limit = (short)openIdx; /* forget any brackets nested within this pair */
+            /* remove lower located synonyms if any */
+            while (pLastIsoRun.limit > pLastIsoRun.start &&
+                   bd.openings[pLastIsoRun.limit - 1].position == pOpening.position)
+                pLastIsoRun.limit--;
+        } else {
+            int k;
+            pOpening.match = -position;
+            /* neutralize lower located synonyms if any */
+            k = openIdx - 1;
+            while (k >= pLastIsoRun.start &&
+                   bd.openings[k].position == pOpening.position)
+                bd.openings[k--].match = 0;
+            /* neutralize any unmatched opening between the current pair;
+               this will also neutralize higher located synonyms if any */
+            for (k = openIdx + 1; k < pLastIsoRun.limit; k++) {
+                qOpening =bd.openings[k];
+                if (qOpening.position >= position)
+                    break;
+                if (qOpening.match > 0)
+                    qOpening.match = 0;
+            }
+        }
+        return newProp;
+    }
+
+    /* handle strong characters, digits and candidates for closing brackets */
+    private void bracketProcessChar(BracketData bd, int position) {
+        IsoRun pLastIsoRun = bd.isoRuns[bd.isoRunLast];
+        byte dirProp, newProp;
+        byte level;
+        dirProp = dirProps[position];
+        if (dirProp == ON) {
+            char c, match;
+            int idx;
+            /* First see if it is a matching closing bracket. Hopefully, this is
+               more efficient than checking if it is a closing bracket at all */
+            c = text[position];
+            for (idx = pLastIsoRun.limit - 1; idx >= pLastIsoRun.start; idx--) {
+                if (bd.openings[idx].match != c)
+                    continue;
+                /* We have a match */
+                newProp = bracketProcessClosing(bd, idx, position);
+                if(newProp == ON) {         /* N0d */
+                    c = 0;          /* prevent handling as an opening */
+                    break;
+                }
+                pLastIsoRun.lastBase = ON;
+                pLastIsoRun.contextDir = newProp;
+                pLastIsoRun.contextPos = position;
+                level = levels[position];
+                if ((level & LEVEL_OVERRIDE) != 0) {    /* X4, X5 */
+                    short flag;
+                    int i;
+                    newProp = (byte)(level & 1);
+                    pLastIsoRun.lastStrong = newProp;
+                    flag = (short)DirPropFlag(newProp);
+                    for (i = pLastIsoRun.start; i < idx; i++)
+                        bd.openings[i].flags |= flag;
+                    /* matching brackets are not overridden by LRO/RLO */
+                    levels[position] &= ~LEVEL_OVERRIDE;
+                }
+                /* matching brackets are not overridden by LRO/RLO */
+                levels[bd.openings[idx].position] &= ~LEVEL_OVERRIDE;
+                return;
+            }
+            /* We get here only if the ON character is not a matching closing
+               bracket or it is a case of N0d */
+            /* Now see if it is an opening bracket */
+            if (c != 0) {
+                match = (char)UCharacter.getBidiPairedBracket(c); /* get the matching char */
+            } else {
+                match = 0;
+            }
+            if (match != c &&               /* has a matching char */
+                UCharacter.getIntPropertyValue(c, BIDI_PAIRED_BRACKET_TYPE) ==
+                    /* opening bracket */         BidiPairedBracketType.OPEN) {
+                /* special case: process synonyms
+                   create an opening entry for each synonym */
+                if (match == 0x232A) {      /* RIGHT-POINTING ANGLE BRACKET */
+                    bracketAddOpening(bd, (char)0x3009, position);
+                }
+                else if (match == 0x3009) { /* RIGHT ANGLE BRACKET */
+                    bracketAddOpening(bd, (char)0x232A, position);
+                }
+                bracketAddOpening(bd, match, position);
+            }
+        }
+        level = levels[position];
+        if ((level & LEVEL_OVERRIDE) != 0) {    /* X4, X5 */
+            newProp = (byte)(level & 1);
+            if (dirProp != S && dirProp != WS && dirProp != ON)
+                dirProps[position] = newProp;
+            pLastIsoRun.lastBase = newProp;
+            pLastIsoRun.lastStrong = newProp;
+            pLastIsoRun.contextDir = newProp;
+            pLastIsoRun.contextPos = position;
+        }
+        else if (dirProp <= R || dirProp == AL) {
+            newProp = DirFromStrong(dirProp);
+            pLastIsoRun.lastBase = dirProp;
+            pLastIsoRun.lastStrong = dirProp;
+            pLastIsoRun.contextDir = newProp;
+            pLastIsoRun.contextPos = position;
+        }
+        else if(dirProp == EN) {
+            pLastIsoRun.lastBase = EN;
+            if (pLastIsoRun.lastStrong == L) {
+                newProp = L;                    /* W7 */
+                if (!bd.isNumbersSpecial)
+                    dirProps[position] = ENL;
+                pLastIsoRun.contextDir = L;
+                pLastIsoRun.contextPos = position;
+            }
+            else {
+                newProp = R;                    /* N0 */
+                if (pLastIsoRun.lastStrong == AL)
+                    dirProps[position] = AN;    /* W2 */
+                else
+                    dirProps[position] = ENR;
+                pLastIsoRun.contextDir = R;
+                pLastIsoRun.contextPos = position;
+            }
+        }
+        else if (dirProp == AN) {
+            newProp = R;                        /* N0 */
+            pLastIsoRun.lastBase = AN;
+            pLastIsoRun.contextDir = R;
+            pLastIsoRun.contextPos = position;
+        }
+        else if (dirProp == NSM) {
+            /* if the last real char was ON, change NSM to ON so that it
+               will stay ON even if the last real char is a bracket which
+               may be changed to L or R */
+            newProp = pLastIsoRun.lastBase;
+            if (newProp == ON)
+                dirProps[position] = newProp;
+        }
+        else {
+            newProp = dirProp;
+            pLastIsoRun.lastBase = dirProp;
+        }
+        if (newProp <= R || newProp == AL) {
+            int i;
+            short flag = (short)DirPropFlag(DirFromStrong(newProp));
+            for (i = pLastIsoRun.start; i < pLastIsoRun.limit; i++)
+                if (position > bd.openings[i].position)
+                    bd.openings[i].flags |= flag;
+        }
+    }
+
+    /* perform (X1)..(X9) ------------------------------------------------------- */
+
+    /* determine if the text is mixed-directional or single-directional */
+    private byte directionFromFlags() {
+
+        /* if the text contains AN and neutrals, then some neutrals may become RTL */
+        if (!((flags & MASK_RTL) != 0 ||
+              ((flags & DirPropFlag(AN)) != 0 &&
+               (flags & MASK_POSSIBLE_N) != 0))) {
+            return LTR;
+        } else if ((flags & MASK_LTR) == 0) {
+            return RTL;
+        } else {
+            return MIXED;
+        }
+    }
+
+    /*
+     * Resolve the explicit levels as specified by explicit embedding codes.
+     * Recalculate the flags to have them reflect the real properties
+     * after taking the explicit embeddings into account.
+     *
+     * The BiDi algorithm is designed to result in the same behavior whether embedding
+     * levels are externally specified (from "styled text", supposedly the preferred
+     * method) or set by explicit embedding codes (LRx, RLx, PDF, FSI, PDI) in the plain text.
+     * That is why (X9) instructs to remove all not-isolate explicit codes (and BN).
+     * However, in a real implementation, the removal of these codes and their index
+     * positions in the plain text is undesirable since it would result in
+     * reallocated, reindexed text.
+     * Instead, this implementation leaves the codes in there and just ignores them
+     * in the subsequent processing.
+     * In order to get the same reordering behavior, positions with a BN or a not-isolate
+     * explicit embedding code just get the same level assigned as the last "real"
+     * character.
+     *
+     * Some implementations, not this one, then overwrite some of these
+     * directionality properties at "real" same-level-run boundaries by
+     * L or R codes so that the resolution of weak types can be performed on the
+     * entire paragraph at once instead of having to parse it once more and
+     * perform that resolution on same-level-runs.
+     * This limits the scope of the implicit rules in effectively
+     * the same way as the run limits.
+     *
+     * Instead, this implementation does not modify these codes, except for
+     * paired brackets whose properties (ON) may be replaced by L or R.
+     * On one hand, the paragraph has to be scanned for same-level-runs, but
+     * on the other hand, this saves another loop to reset these codes,
+     * or saves making and modifying a copy of dirProps[].
+     *
+     *
+     * Note that (Pn) and (Xn) changed significantly from version 4 of the BiDi algorithm.
+     *
+     *
+     * Handling the stack of explicit levels (Xn):
+     *
+     * With the BiDi stack of explicit levels, as pushed with each
+     * LRE, RLE, LRO, RLO, LRI, RLI and FSI and popped with each PDF and PDI,
+     * the explicit level must never exceed MAX_EXPLICIT_LEVEL.
+     *
+     * In order to have a correct push-pop semantics even in the case of overflows,
+     * overflow counters and a valid isolate counter are used as described in UAX#9
+     * section 3.3.2 "Explicit Levels and Directions".
+     *
+     * This implementation assumes that MAX_EXPLICIT_LEVEL is odd.
+     *
+     * Returns the direction
+     *
+     */
+    private byte resolveExplicitLevels() {
+        int i = 0;
+        byte dirProp;
+        byte level = GetParaLevelAt(0);
+        byte dirct;
+        isolateCount = 0;
+
+        /* determine if the text is mixed-directional or single-directional */
+        dirct = directionFromFlags();
+
+        /* we may not need to resolve any explicit levels */
+        if (dirct != MIXED) {
+            /* not mixed directionality: levels don't matter - trailingWSStart will be 0 */
+            return dirct;
+        }
+
+        if (reorderingMode > REORDER_LAST_LOGICAL_TO_VISUAL) {
+            /* inverse BiDi: mixed, but all characters are at the same embedding level */
+            /* set all levels to the paragraph level */
+            int paraIndex, start, limit;
+            for (paraIndex = 0; paraIndex < paraCount; paraIndex++) {
+                if (paraIndex == 0)
+                    start = 0;
+                else
+                    start = paras_limit[paraIndex - 1];
+                limit = paras_limit[paraIndex];
+                level = paras_level[paraIndex];
+                for (i = start; i < limit; i++)
+                    levels[i] =level;
+            }
+            return dirct;               /* no bracket matching for inverse BiDi */
+        }
+        if ((flags & (MASK_EXPLICIT | MASK_ISO)) == 0) {
+            /* no embeddings, set all levels to the paragraph level */
+            /* we still have to perform bracket matching */
+            int paraIndex, start, limit;
+            BracketData bracketData = new BracketData();
+            bracketInit(bracketData);
+            for (paraIndex = 0; paraIndex < paraCount; paraIndex++) {
+                if (paraIndex == 0)
+                    start = 0;
+                else
+                    start = paras_limit[paraIndex-1];
+                limit = paras_limit[paraIndex];
+                level = paras_level[paraIndex];
+                for (i = start; i < limit; i++) {
+                    levels[i] = level;
+                    dirProp = dirProps[i];
+                    if (dirProp == BN)
+                        continue;
+                    if (dirProp == B) {
+                        if ((i + 1) < length) {
+                            if (text[i] == CR && text[i + 1] == LF)
+                                continue;   /* skip CR when followed by LF */
+                            bracketProcessB(bracketData, level);
+                        }
+                        continue;
+                    }
+                    bracketProcessChar(bracketData, i);
+                }
+            }
+            return dirct;
+        }
+        /* continue to perform (Xn) */
+
+        /* (X1) level is set for all codes, embeddingLevel keeps track of the push/pop operations */
+        /* both variables may carry the LEVEL_OVERRIDE flag to indicate the override status */
+        byte embeddingLevel = level, newLevel;
+        byte previousLevel = level; /* previous level for regular (not CC) characters */
+        int lastCcPos = 0;          /* index of last effective LRx,RLx, PDx */
+
+        /* The following stack remembers the embedding level and the ISOLATE flag of level runs.
+           stackLast points to its current entry. */
+        short[] stack = new short[MAX_EXPLICIT_LEVEL + 2];  /* we never push anything >= MAX_EXPLICIT_LEVEL
+                                                               but we need one more entry as base */
+        int stackLast = 0;
+        int overflowIsolateCount = 0;
+        int overflowEmbeddingCount = 0;
+        int validIsolateCount = 0;
+        BracketData bracketData = new BracketData();
+        bracketInit(bracketData);
+        stack[0] = level;       /* initialize base entry to para level, no override, no isolate */
+
+        /* recalculate the flags */
+        flags = 0;
+
+        for (i = 0; i < length; i++) {
+            dirProp = dirProps[i];
+            switch (dirProp) {
+            case LRE:
+            case RLE:
+            case LRO:
+            case RLO:
+                /* (X2, X3, X4, X5) */
+                flags |= DirPropFlag(BN);
+                levels[i] = previousLevel;
+                if (dirProp == LRE || dirProp == LRO) {
+                    /* least greater even level */
+                    newLevel = (byte)((embeddingLevel+2) & ~(LEVEL_OVERRIDE | 1));
+                } else {
+                    /* least greater odd level */
+                    newLevel = (byte)((NoOverride(embeddingLevel) + 1) | 1);
+                }
+                if (newLevel <= MAX_EXPLICIT_LEVEL && overflowIsolateCount == 0 &&
+                                                      overflowEmbeddingCount == 0) {
+                    lastCcPos = i;
+                    embeddingLevel = newLevel;
+                    if (dirProp == LRO || dirProp == RLO)
+                        embeddingLevel |= LEVEL_OVERRIDE;
+                    stackLast++;
+                    stack[stackLast] = embeddingLevel;
+                    /* we don't need to set LEVEL_OVERRIDE off for LRE and RLE
+                       since this has already been done for newLevel which is
+                       the source for embeddingLevel.
+                     */
+                } else {
+                    if (overflowIsolateCount == 0)
+                        overflowEmbeddingCount++;
+                }
+                break;
+            case PDF:
+                /* (X7) */
+                flags |= DirPropFlag(BN);
+                levels[i] = previousLevel;
+                /* handle all the overflow cases first */
+                if (overflowIsolateCount > 0) {
+                    break;
+                }
+                if (overflowEmbeddingCount > 0) {
+                    overflowEmbeddingCount--;
+                    break;
+                }
+                if (stackLast > 0 && stack[stackLast] < ISOLATE) {   /* not an isolate entry */
+                    lastCcPos = i;
+                    stackLast--;
+                    embeddingLevel = (byte)stack[stackLast];
+                }
+                break;
+            case LRI:
+            case RLI:
+                flags |= DirPropFlag(ON) | DirPropFlagLR(embeddingLevel);
+                levels[i] = NoOverride(embeddingLevel);
+                if (NoOverride(embeddingLevel) != NoOverride(previousLevel)) {
+                    bracketProcessBoundary(bracketData, lastCcPos,
+                                           previousLevel, embeddingLevel);
+                    flags |= DirPropFlagMultiRuns;
+                }
+                previousLevel = embeddingLevel;
+                /* (X5a, X5b) */
+                if (dirProp == LRI)
+                    /* least greater even level */
+                    newLevel=(byte)((embeddingLevel+2)&~(LEVEL_OVERRIDE|1));
+                else
+                    /* least greater odd level */
+                    newLevel=(byte)((NoOverride(embeddingLevel)+1)|1);
+                if (newLevel <= MAX_EXPLICIT_LEVEL && overflowIsolateCount == 0
+                                                   && overflowEmbeddingCount == 0) {
+                    flags |= DirPropFlag(dirProp);
+                    lastCcPos = i;
+                    validIsolateCount++;
+                    if (validIsolateCount > isolateCount)
+                        isolateCount = validIsolateCount;
+                    embeddingLevel = newLevel;
+                    /* we can increment stackLast without checking because newLevel
+                       will exceed UBIDI_MAX_EXPLICIT_LEVEL before stackLast overflows */
+                    stackLast++;
+                    stack[stackLast] = (short)(embeddingLevel + ISOLATE);
+                    bracketProcessLRI_RLI(bracketData, embeddingLevel);
+                } else {
+                    /* make it WS so that it is handled by adjustWSLevels() */
+                    dirProps[i] = WS;
+                    overflowIsolateCount++;
+                }
+                break;
+            case PDI:
+                if (NoOverride(embeddingLevel) != NoOverride(previousLevel)) {
+                    bracketProcessBoundary(bracketData, lastCcPos,
+                                           previousLevel, embeddingLevel);
+                    flags |= DirPropFlagMultiRuns;
+                }
+                /* (X6a) */
+                if (overflowIsolateCount > 0) {
+                    overflowIsolateCount--;
+                    /* make it WS so that it is handled by adjustWSLevels() */
+                    dirProps[i] = WS;
+                }
+                else if (validIsolateCount > 0) {
+                    flags |= DirPropFlag(PDI);
+                    lastCcPos = i;
+                    overflowEmbeddingCount = 0;
+                    while (stack[stackLast] < ISOLATE)  /* pop embedding entries */
+                        stackLast--;                    /* until the last isolate entry */
+                    stackLast--;                        /* pop also the last isolate entry */
+                    validIsolateCount--;
+                    bracketProcessPDI(bracketData);
+                } else
+                    /* make it WS so that it is handled by adjustWSLevels() */
+                    dirProps[i] = WS;
+                embeddingLevel = (byte)(stack[stackLast] & ~ISOLATE);
+                flags |= DirPropFlag(ON) | DirPropFlagLR(embeddingLevel);
+                previousLevel = embeddingLevel;
+                levels[i] = NoOverride(embeddingLevel);
+                break;
+            case B:
+                flags |= DirPropFlag(B);
+                levels[i] = GetParaLevelAt(i);
+                if ((i + 1) < length) {
+                    if (text[i] == CR && text[i + 1] == LF)
+                        break;          /* skip CR when followed by LF */
+                    overflowEmbeddingCount = overflowIsolateCount = 0;
+                    validIsolateCount = 0;
+                    stackLast = 0;
+                    previousLevel = embeddingLevel = GetParaLevelAt(i + 1);
+                    stack[0] = embeddingLevel;   /* initialize base entry to para level, no override, no isolate */
+                    bracketProcessB(bracketData, embeddingLevel);
+                }
+                break;
+            case BN:
+                /* BN, LRE, RLE, and PDF are supposed to be removed (X9) */
+                /* they will get their levels set correctly in adjustWSLevels() */
+                levels[i] = previousLevel;
+                flags |= DirPropFlag(BN);
+                break;
+            default:
+                /* all other types are normal characters and get the "real" level */
+                if (NoOverride(embeddingLevel) != NoOverride(previousLevel)) {
+                    bracketProcessBoundary(bracketData, lastCcPos,
+                                           previousLevel, embeddingLevel);
+                    flags |= DirPropFlagMultiRuns;
+                    if ((embeddingLevel & LEVEL_OVERRIDE) != 0)
+                        flags |= DirPropFlagO(embeddingLevel);
+                    else
+                        flags |= DirPropFlagE(embeddingLevel);
+                }
+                previousLevel = embeddingLevel;
+                levels[i] = embeddingLevel;
+                bracketProcessChar(bracketData, i);
+                /* the dirProp may have been changed in bracketProcessChar() */
+                flags |= DirPropFlag(dirProps[i]);
+                break;
+            }
+        }
+        if ((flags & MASK_EMBEDDING) != 0) {
+            flags |= DirPropFlagLR(paraLevel);
+        }
+        if (orderParagraphsLTR && (flags & DirPropFlag(B)) != 0) {
+            flags |= DirPropFlag(L);
+        }
+        /* again, determine if the text is mixed-directional or single-directional */
+        dirct = directionFromFlags();
+
+        return dirct;
+    }
+
+    /*
+     * Use a pre-specified embedding levels array:
+     *
+     * Adjust the directional properties for overrides (->LEVEL_OVERRIDE),
+     * ignore all explicit codes (X9),
+     * and check all the preset levels.
+     *
+     * Recalculate the flags to have them reflect the real properties
+     * after taking the explicit embeddings into account.
+     */
+    private byte checkExplicitLevels() {
+        byte dirProp;
+        int i;
+        int isolateCount = 0;
+
+        this.flags = 0;     /* collect all directionalities in the text */
+        byte level;
+        this.isolateCount = 0;
+
+        for (i = 0; i < length; ++i) {
+            if (levels[i] == 0) {
+               levels[i] = paraLevel;
+            }
+
+            // for backward compatibility
+            if (MAX_EXPLICIT_LEVEL < (levels[i]&0x7f)) {
+                if ((levels[i] & LEVEL_OVERRIDE) != 0) {
+                    levels[i] =  (byte)(paraLevel|LEVEL_OVERRIDE);
+                } else {
+                    levels[i] = paraLevel;
+                }
+            }
+
+            level = levels[i];
+            dirProp = dirProps[i];
+            if (dirProp == LRI || dirProp == RLI) {
+                isolateCount++;
+                if (isolateCount > this.isolateCount)
+                    this.isolateCount = isolateCount;
+            }
+            else if (dirProp == PDI) {
+                isolateCount--;
+            } else if (dirProp == B) {
+                isolateCount = 0;
+            }
+            if ((level & LEVEL_OVERRIDE) != 0) {
+                /* keep the override flag in levels[i] but adjust the flags */
+                level &= ~LEVEL_OVERRIDE;     /* make the range check below simpler */
+                flags |= DirPropFlagO(level);
+            } else {
+                /* set the flags */
+                flags |= DirPropFlagE(level) | DirPropFlag(dirProp);
+            }
+            if ((level < GetParaLevelAt(i) &&
+                    !((0 == level) && (dirProp == B))) ||
+                    (MAX_EXPLICIT_LEVEL < level)) {
+                /* level out of bounds */
+                throw new IllegalArgumentException("level " + level +
+                                                   " out of bounds at " + i);
+            }
+        }
+        if ((flags & MASK_EMBEDDING) != 0) {
+            flags |= DirPropFlagLR(paraLevel);
+        }
+        /* determine if the text is mixed-directional or single-directional */
+        return directionFromFlags();
+    }
+
+    /* *******************************************************************/
+    /* The Properties state machine table                                */
+    /* *******************************************************************/
+    /*                                                                   */
+    /* All table cells are 8 bits:                                       */
+    /*      bits 0..4:  next state                                       */
+    /*      bits 5..7:  action to perform (if > 0)                       */
+    /*                                                                   */
+    /* Cells may be of format "n" where n represents the next state      */
+    /* (except for the rightmost column).                                */
+    /* Cells may also be of format "_(x,y)" where x represents an action */
+    /* to perform and y represents the next state.                       */
+    /*                                                                   */
+    /* *******************************************************************/
+    /* Definitions and type for properties state tables                  */
+    /* *******************************************************************/
+    private static final int IMPTABPROPS_COLUMNS = 16;
+    private static final int IMPTABPROPS_RES = IMPTABPROPS_COLUMNS - 1;
+    private static short GetStateProps(short cell) {
+        return (short)(cell & 0x1f);
+    }
+    private static short GetActionProps(short cell) {
+        return (short)(cell >> 5);
+    }
+
+    private static final short groupProp[] =          /* dirProp regrouped */
+    {
+        /*  L   R   EN  ES  ET  AN  CS  B   S   WS  ON  LRE LRO AL  RLE RLO PDF NSM BN  FSI LRI RLI PDI ENL ENR */
+            0,  1,  2,  7,  8,  3,  9,  6,  5,  4,  4,  10, 10, 12, 10, 10, 10, 11, 10, 4,  4,  4,  4,  13, 14
+    };
+    private static final short _L  = 0;
+    private static final short _R  = 1;
+    private static final short _EN = 2;
+    private static final short _AN = 3;
+    private static final short _ON = 4;
+    private static final short _S  = 5;
+    private static final short _B  = 6; /* reduced dirProp */
+
+    /* *******************************************************************/
+    /*                                                                   */
+    /*      PROPERTIES  STATE  TABLE                                     */
+    /*                                                                   */
+    /* In table impTabProps,                                             */
+    /*      - the ON column regroups ON and WS, FSI, RLI, LRI and PDI    */
+    /*      - the BN column regroups BN, LRE, RLE, LRO, RLO, PDF         */
+    /*      - the Res column is the reduced property assigned to a run   */
+    /*                                                                   */
+    /* Action 1: process current run1, init new run1                     */
+    /*        2: init new run2                                           */
+    /*        3: process run1, process run2, init new run1               */
+    /*        4: process run1, set run1=run2, init new run2              */
+    /*                                                                   */
+    /* Notes:                                                            */
+    /*  1) This table is used in resolveImplicitLevels().                */
+    /*  2) This table triggers actions when there is a change in the Bidi*/
+    /*     property of incoming characters (action 1).                   */
+    /*  3) Most such property sequences are processed immediately (in    */
+    /*     fact, passed to processPropertySeq().                         */
+    /*  4) However, numbers are assembled as one sequence. This means    */
+    /*     that undefined situations (like CS following digits, until    */
+    /*     it is known if the next char will be a digit) are held until  */
+    /*     following chars define them.                                  */
+    /*     Example: digits followed by CS, then comes another CS or ON;  */
+    /*              the digits will be processed, then the CS assigned   */
+    /*              as the start of an ON sequence (action 3).           */
+    /*  5) There are cases where more than one sequence must be          */
+    /*     processed, for instance digits followed by CS followed by L:  */
+    /*     the digits must be processed as one sequence, and the CS      */
+    /*     must be processed as an ON sequence, all this before starting */
+    /*     assembling chars for the opening L sequence.                  */
+    /*                                                                   */
+    /*                                                                   */
+    private static final short impTabProps[][] =
+    {
+/*                        L,     R,    EN,    AN,    ON,     S,     B,    ES,    ET,    CS,    BN,   NSM,    AL,   ENL,   ENR,   Res */
+/* 0 Init        */ {     1,     2,     4,     5,     7,    15,    17,     7,     9,     7,     0,     7,     3,    18,    21,   _ON },
+/* 1 L           */ {     1,  32+2,  32+4,  32+5,  32+7, 32+15, 32+17,  32+7,  32+9,  32+7,     1,     1,  32+3, 32+18, 32+21,    _L },
+/* 2 R           */ {  32+1,     2,  32+4,  32+5,  32+7, 32+15, 32+17,  32+7,  32+9,  32+7,     2,     2,  32+3, 32+18, 32+21,    _R },
+/* 3 AL          */ {  32+1,  32+2,  32+6,  32+6,  32+8, 32+16, 32+17,  32+8,  32+8,  32+8,     3,     3,     3, 32+18, 32+21,    _R },
+/* 4 EN          */ {  32+1,  32+2,     4,  32+5,  32+7, 32+15, 32+17, 64+10,    11, 64+10,     4,     4,  32+3,    18,    21,   _EN },
+/* 5 AN          */ {  32+1,  32+2,  32+4,     5,  32+7, 32+15, 32+17,  32+7,  32+9, 64+12,     5,     5,  32+3, 32+18, 32+21,   _AN },
+/* 6 AL:EN/AN    */ {  32+1,  32+2,     6,     6,  32+8, 32+16, 32+17,  32+8,  32+8, 64+13,     6,     6,  32+3,    18,    21,   _AN },
+/* 7 ON          */ {  32+1,  32+2,  32+4,  32+5,     7, 32+15, 32+17,     7, 64+14,     7,     7,     7,  32+3, 32+18, 32+21,   _ON },
+/* 8 AL:ON       */ {  32+1,  32+2,  32+6,  32+6,     8, 32+16, 32+17,     8,     8,     8,     8,     8,  32+3, 32+18, 32+21,   _ON },
+/* 9 ET          */ {  32+1,  32+2,     4,  32+5,     7, 32+15, 32+17,     7,     9,     7,     9,     9,  32+3,    18,    21,   _ON },
+/*10 EN+ES/CS    */ {  96+1,  96+2,     4,  96+5, 128+7, 96+15, 96+17, 128+7,128+14, 128+7,    10, 128+7,  96+3,    18,    21,   _EN },
+/*11 EN+ET       */ {  32+1,  32+2,     4,  32+5,  32+7, 32+15, 32+17,  32+7,    11,  32+7,    11,    11,  32+3,    18,    21,   _EN },
+/*12 AN+CS       */ {  96+1,  96+2,  96+4,     5, 128+7, 96+15, 96+17, 128+7,128+14, 128+7,    12, 128+7,  96+3, 96+18, 96+21,   _AN },
+/*13 AL:EN/AN+CS */ {  96+1,  96+2,     6,     6, 128+8, 96+16, 96+17, 128+8, 128+8, 128+8,    13, 128+8,  96+3,    18,    21,   _AN },
+/*14 ON+ET       */ {  32+1,  32+2, 128+4,  32+5,     7, 32+15, 32+17,     7,    14,     7,    14,    14,  32+3,128+18,128+21,   _ON },
+/*15 S           */ {  32+1,  32+2,  32+4,  32+5,  32+7,    15, 32+17,  32+7,  32+9,  32+7,    15,  32+7,  32+3, 32+18, 32+21,    _S },
+/*16 AL:S        */ {  32+1,  32+2,  32+6,  32+6,  32+8,    16, 32+17,  32+8,  32+8,  32+8,    16,  32+8,  32+3, 32+18, 32+21,    _S },
+/*17 B           */ {  32+1,  32+2,  32+4,  32+5,  32+7, 32+15,    17,  32+7,  32+9,  32+7,    17,  32+7,  32+3, 32+18, 32+21,    _B },
+/*18 ENL         */ {  32+1,  32+2,    18,  32+5,  32+7, 32+15, 32+17, 64+19,    20, 64+19,    18,    18,  32+3,    18,    21,    _L },
+/*19 ENL+ES/CS   */ {  96+1,  96+2,    18,  96+5, 128+7, 96+15, 96+17, 128+7,128+14, 128+7,    19, 128+7,  96+3,    18,    21,    _L },
+/*20 ENL+ET      */ {  32+1,  32+2,    18,  32+5,  32+7, 32+15, 32+17,  32+7,    20,  32+7,    20,    20,  32+3,    18,    21,    _L },
+/*21 ENR         */ {  32+1,  32+2,    21,  32+5,  32+7, 32+15, 32+17, 64+22,    23, 64+22,    21,    21,  32+3,    18,    21,   _AN },
+/*22 ENR+ES/CS   */ {  96+1,  96+2,    21,  96+5, 128+7, 96+15, 96+17, 128+7,128+14, 128+7,    22, 128+7,  96+3,    18,    21,   _AN },
+/*23 ENR+ET      */ {  32+1,  32+2,    21,  32+5,  32+7, 32+15, 32+17,  32+7,    23,  32+7,    23,    23,  32+3,    18,    21,   _AN }
+    };
+
+    /* *******************************************************************/
+    /* The levels state machine tables                                   */
+    /* *******************************************************************/
+    /*                                                                   */
+    /* All table cells are 8 bits:                                       */
+    /*      bits 0..3:  next state                                       */
+    /*      bits 4..7:  action to perform (if > 0)                       */
+    /*                                                                   */
+    /* Cells may be of format "n" where n represents the next state      */
+    /* (except for the rightmost column).                                */
+    /* Cells may also be of format "_(x,y)" where x represents an action */
+    /* to perform and y represents the next state.                       */
+    /*                                                                   */
+    /* This format limits each table to 16 states each and to 15 actions.*/
+    /*                                                                   */
+    /* *******************************************************************/
+    /* Definitions and type for levels state tables                      */
+    /* *******************************************************************/
+    private static final int IMPTABLEVELS_COLUMNS = _B + 2;
+    private static final int IMPTABLEVELS_RES = IMPTABLEVELS_COLUMNS - 1;
+    private static short GetState(byte cell) { return (short)(cell & 0x0f); }
+    private static short GetAction(byte cell) { return (short)(cell >> 4); }
+
+    private static class ImpTabPair {
+        byte[][][] imptab;
+        short[][] impact;
+
+        ImpTabPair(byte[][] table1, byte[][] table2,
+                   short[] act1, short[] act2) {
+            imptab = new byte[][][] {table1, table2};
+            impact = new short[][] {act1, act2};
+        }
+    }
+
+    /* *******************************************************************/
+    /*                                                                   */
+    /*      LEVELS  STATE  TABLES                                        */
+    /*                                                                   */
+    /* In all levels state tables,                                       */
+    /*      - state 0 is the initial state                               */
+    /*      - the Res column is the increment to add to the text level   */
+    /*        for this property sequence.                                */
+    /*                                                                   */
+    /* The impact arrays for each table of a pair map the local action   */
+    /* numbers of the table to the total list of actions. For instance,  */
+    /* action 2 in a given table corresponds to the action number which  */
+    /* appears in entry [2] of the impact array for that table.          */
+    /* The first entry of all impact arrays must be 0.                   */
+    /*                                                                   */
+    /* Action 1: init conditional sequence                               */
+    /*        2: prepend conditional sequence to current sequence        */
+    /*        3: set ON sequence to new level - 1                        */
+    /*        4: init EN/AN/ON sequence                                  */
+    /*        5: fix EN/AN/ON sequence followed by R                     */
+    /*        6: set previous level sequence to level 2                  */
+    /*                                                                   */
+    /* Notes:                                                            */
+    /*  1) These tables are used in processPropertySeq(). The input      */
+    /*     is property sequences as determined by resolveImplicitLevels. */
+    /*  2) Most such property sequences are processed immediately        */
+    /*     (levels are assigned).                                        */
+    /*  3) However, some sequences cannot be assigned a final level till */
+    /*     one or more following sequences are received. For instance,   */
+    /*     ON following an R sequence within an even-level paragraph.    */
+    /*     If the following sequence is R, the ON sequence will be       */
+    /*     assigned basic run level+1, and so will the R sequence.       */
+    /*  4) S is generally handled like ON, since its level will be fixed */
+    /*     to paragraph level in adjustWSLevels().                       */
+    /*                                                                   */
+
+    private static final byte impTabL_DEFAULT[][] = /* Even paragraph level */
+        /*  In this table, conditional sequences receive the lower possible level
+            until proven otherwise.
+        */
+    {
+        /*                         L,     R,    EN,    AN,    ON,     S,     B, Res */
+        /* 0 : init       */ {     0,     1,     0,     2,     0,     0,     0,  0 },
+        /* 1 : R          */ {     0,     1,     3,     3,  0x14,  0x14,     0,  1 },
+        /* 2 : AN         */ {     0,     1,     0,     2,  0x15,  0x15,     0,  2 },
+        /* 3 : R+EN/AN    */ {     0,     1,     3,     3,  0x14,  0x14,     0,  2 },
+        /* 4 : R+ON       */ {     0,  0x21,  0x33,  0x33,     4,     4,     0,  0 },
+        /* 5 : AN+ON      */ {     0,  0x21,     0,  0x32,     5,     5,     0,  0 }
+    };
+
+    private static final byte impTabR_DEFAULT[][] = /* Odd  paragraph level */
+        /*  In this table, conditional sequences receive the lower possible level
+            until proven otherwise.
+        */
+    {
+        /*                         L,     R,    EN,    AN,    ON,     S,     B, Res */
+        /* 0 : init       */ {     1,     0,     2,     2,     0,     0,     0,  0 },
+        /* 1 : L          */ {     1,     0,     1,     3,  0x14,  0x14,     0,  1 },
+        /* 2 : EN/AN      */ {     1,     0,     2,     2,     0,     0,     0,  1 },
+        /* 3 : L+AN       */ {     1,     0,     1,     3,     5,     5,     0,  1 },
+        /* 4 : L+ON       */ {  0x21,     0,  0x21,     3,     4,     4,     0,  0 },
+        /* 5 : L+AN+ON    */ {     1,     0,     1,     3,     5,     5,     0,  0 }
+    };
+
+    private static final short[] impAct0 = {0,1,2,3,4};
+
+    private static final ImpTabPair impTab_DEFAULT = new ImpTabPair(
+            impTabL_DEFAULT, impTabR_DEFAULT, impAct0, impAct0);
+
+    private static final byte impTabL_NUMBERS_SPECIAL[][] = { /* Even paragraph level */
+        /* In this table, conditional sequences receive the lower possible
+           level until proven otherwise.
+        */
+        /*                         L,     R,    EN,    AN,    ON,     S,     B, Res */
+        /* 0 : init       */ {     0,     2,  0x11,  0x11,     0,     0,     0,  0 },
+        /* 1 : L+EN/AN    */ {     0,  0x42,     1,     1,     0,     0,     0,  0 },
+        /* 2 : R          */ {     0,     2,     4,     4,  0x13,  0x13,     0,  1 },
+        /* 3 : R+ON       */ {     0,  0x22,  0x34,  0x34,     3,     3,     0,  0 },
+        /* 4 : R+EN/AN    */ {     0,     2,     4,     4,  0x13,  0x13,     0,  2 }
+    };
+    private static final ImpTabPair impTab_NUMBERS_SPECIAL = new ImpTabPair(
+            impTabL_NUMBERS_SPECIAL, impTabR_DEFAULT, impAct0, impAct0);
+
+    private static final byte impTabL_GROUP_NUMBERS_WITH_R[][] = {
+        /* In this table, EN/AN+ON sequences receive levels as if associated with R
+           until proven that there is L or sor/eor on both sides. AN is handled like EN.
+        */
+        /*                         L,     R,    EN,    AN,    ON,     S,     B, Res */
+        /* 0 init         */ {     0,     3,  0x11,  0x11,     0,     0,     0,  0 },
+        /* 1 EN/AN        */ {  0x20,     3,     1,     1,     2,  0x20,  0x20,  2 },
+        /* 2 EN/AN+ON     */ {  0x20,     3,     1,     1,     2,  0x20,  0x20,  1 },
+        /* 3 R            */ {     0,     3,     5,     5,  0x14,     0,     0,  1 },
+        /* 4 R+ON         */ {  0x20,     3,     5,     5,     4,  0x20,  0x20,  1 },
+        /* 5 R+EN/AN      */ {     0,     3,     5,     5,  0x14,     0,     0,  2 }
+    };
+    private static final byte impTabR_GROUP_NUMBERS_WITH_R[][] = {
+        /*  In this table, EN/AN+ON sequences receive levels as if associated with R
+            until proven that there is L on both sides. AN is handled like EN.
+        */
+        /*                         L,     R,    EN,    AN,    ON,     S,     B, Res */
+        /* 0 init         */ {     2,     0,     1,     1,     0,     0,     0,  0 },
+        /* 1 EN/AN        */ {     2,     0,     1,     1,     0,     0,     0,  1 },
+        /* 2 L            */ {     2,     0,  0x14,  0x14,  0x13,     0,     0,  1 },
+        /* 3 L+ON         */ {  0x22,     0,     4,     4,     3,     0,     0,  0 },
+        /* 4 L+EN/AN      */ {  0x22,     0,     4,     4,     3,     0,     0,  1 }
+    };
+    private static final ImpTabPair impTab_GROUP_NUMBERS_WITH_R = new
+            ImpTabPair(impTabL_GROUP_NUMBERS_WITH_R,
+                       impTabR_GROUP_NUMBERS_WITH_R, impAct0, impAct0);
+
+    private static final byte impTabL_INVERSE_NUMBERS_AS_L[][] = {
+        /* This table is identical to the Default LTR table except that EN and AN
+           are handled like L.
+        */
+        /*                         L,     R,    EN,    AN,    ON,     S,     B, Res */
+        /* 0 : init       */ {     0,     1,     0,     0,     0,     0,     0,  0 },
+        /* 1 : R          */ {     0,     1,     0,     0,  0x14,  0x14,     0,  1 },
+        /* 2 : AN         */ {     0,     1,     0,     0,  0x15,  0x15,     0,  2 },
+        /* 3 : R+EN/AN    */ {     0,     1,     0,     0,  0x14,  0x14,     0,  2 },
+        /* 4 : R+ON       */ {  0x20,     1,  0x20,  0x20,     4,     4,  0x20,  1 },
+        /* 5 : AN+ON      */ {  0x20,     1,  0x20,  0x20,     5,     5,  0x20,  1 }
+    };
+    private static final byte impTabR_INVERSE_NUMBERS_AS_L[][] = {
+        /* This table is identical to the Default RTL table except that EN and AN
+           are handled like L.
+        */
+        /*                         L,     R,    EN,    AN,    ON,     S,     B, Res */
+        /* 0 : init       */ {     1,     0,     1,     1,     0,     0,     0,  0 },
+        /* 1 : L          */ {     1,     0,     1,     1,  0x14,  0x14,     0,  1 },
+        /* 2 : EN/AN      */ {     1,     0,     1,     1,     0,     0,     0,  1 },
+        /* 3 : L+AN       */ {     1,     0,     1,     1,     5,     5,     0,  1 },
+        /* 4 : L+ON       */ {  0x21,     0,  0x21,  0x21,     4,     4,     0,  0 },
+        /* 5 : L+AN+ON    */ {     1,     0,     1,     1,     5,     5,     0,  0 }
+    };
+    private static final ImpTabPair impTab_INVERSE_NUMBERS_AS_L = new ImpTabPair
+            (impTabL_INVERSE_NUMBERS_AS_L, impTabR_INVERSE_NUMBERS_AS_L,
+             impAct0, impAct0);
+
+    private static final byte impTabR_INVERSE_LIKE_DIRECT[][] = {  /* Odd  paragraph level */
+        /*  In this table, conditional sequences receive the lower possible level
+            until proven otherwise.
+        */
+        /*                         L,     R,    EN,    AN,    ON,     S,     B, Res */
+        /* 0 : init       */ {     1,     0,     2,     2,     0,     0,     0,  0 },
+        /* 1 : L          */ {     1,     0,     1,     2,  0x13,  0x13,     0,  1 },
+        /* 2 : EN/AN      */ {     1,     0,     2,     2,     0,     0,     0,  1 },
+        /* 3 : L+ON       */ {  0x21,  0x30,     6,     4,     3,     3,  0x30,  0 },
+        /* 4 : L+ON+AN    */ {  0x21,  0x30,     6,     4,     5,     5,  0x30,  3 },
+        /* 5 : L+AN+ON    */ {  0x21,  0x30,     6,     4,     5,     5,  0x30,  2 },
+        /* 6 : L+ON+EN    */ {  0x21,  0x30,     6,     4,     3,     3,  0x30,  1 }
+    };
+    private static final short[] impAct1 = {0,1,13,14};
+    private static final ImpTabPair impTab_INVERSE_LIKE_DIRECT = new ImpTabPair(
+            impTabL_DEFAULT, impTabR_INVERSE_LIKE_DIRECT, impAct0, impAct1);
+
+    private static final byte impTabL_INVERSE_LIKE_DIRECT_WITH_MARKS[][] = {
+        /* The case handled in this table is (visually):  R EN L
+         */
+        /*                         L,     R,    EN,    AN,    ON,     S,     B, Res */
+        /* 0 : init       */ {     0,  0x63,     0,     1,     0,     0,     0,  0 },
+        /* 1 : L+AN       */ {     0,  0x63,     0,     1,  0x12,  0x30,     0,  4 },
+        /* 2 : L+AN+ON    */ {  0x20,  0x63,  0x20,     1,     2,  0x30,  0x20,  3 },
+        /* 3 : R          */ {     0,  0x63,  0x55,  0x56,  0x14,  0x30,     0,  3 },
+        /* 4 : R+ON       */ {  0x30,  0x43,  0x55,  0x56,     4,  0x30,  0x30,  3 },
+        /* 5 : R+EN       */ {  0x30,  0x43,     5,  0x56,  0x14,  0x30,  0x30,  4 },
+        /* 6 : R+AN       */ {  0x30,  0x43,  0x55,     6,  0x14,  0x30,  0x30,  4 }
+    };
+    private static final byte impTabR_INVERSE_LIKE_DIRECT_WITH_MARKS[][] = {
+        /* The cases handled in this table are (visually):  R EN L
+                                                            R L AN L
+        */
+        /*                         L,     R,    EN,    AN,    ON,     S,     B, Res */
+        /* 0 : init       */ {  0x13,     0,     1,     1,     0,     0,     0,  0 },
+        /* 1 : R+EN/AN    */ {  0x23,     0,     1,     1,     2,  0x40,     0,  1 },
+        /* 2 : R+EN/AN+ON */ {  0x23,     0,     1,     1,     2,  0x40,     0,  0 },
+        /* 3 : L          */ {     3,     0,     3,  0x36,  0x14,  0x40,     0,  1 },
+        /* 4 : L+ON       */ {  0x53,  0x40,     5,  0x36,     4,  0x40,  0x40,  0 },
+        /* 5 : L+ON+EN    */ {  0x53,  0x40,     5,  0x36,     4,  0x40,  0x40,  1 },
+        /* 6 : L+AN       */ {  0x53,  0x40,     6,     6,     4,  0x40,  0x40,  3 }
+    };
+    private static final short[] impAct2 = {0,1,2,5,6,7,8};
+    private static final short[] impAct3 = {0,1,9,10,11,12};
+    private static final ImpTabPair impTab_INVERSE_LIKE_DIRECT_WITH_MARKS =
+            new ImpTabPair(impTabL_INVERSE_LIKE_DIRECT_WITH_MARKS,
+                           impTabR_INVERSE_LIKE_DIRECT_WITH_MARKS, impAct2, impAct3);
+
+    private static final ImpTabPair impTab_INVERSE_FOR_NUMBERS_SPECIAL = new ImpTabPair(
+            impTabL_NUMBERS_SPECIAL, impTabR_INVERSE_LIKE_DIRECT, impAct0, impAct1);
+
+    private static final byte impTabL_INVERSE_FOR_NUMBERS_SPECIAL_WITH_MARKS[][] = {
+        /*  The case handled in this table is (visually):  R EN L
+        */
+        /*                         L,     R,    EN,    AN,    ON,     S,     B, Res */
+        /* 0 : init       */ {     0,  0x62,     1,     1,     0,     0,     0,  0 },
+        /* 1 : L+EN/AN    */ {     0,  0x62,     1,     1,     0,  0x30,     0,  4 },
+        /* 2 : R          */ {     0,  0x62,  0x54,  0x54,  0x13,  0x30,     0,  3 },
+        /* 3 : R+ON       */ {  0x30,  0x42,  0x54,  0x54,     3,  0x30,  0x30,  3 },
+        /* 4 : R+EN/AN    */ {  0x30,  0x42,     4,     4,  0x13,  0x30,  0x30,  4 }
+    };
+    private static final ImpTabPair impTab_INVERSE_FOR_NUMBERS_SPECIAL_WITH_MARKS = new
+            ImpTabPair(impTabL_INVERSE_FOR_NUMBERS_SPECIAL_WITH_MARKS,
+                       impTabR_INVERSE_LIKE_DIRECT_WITH_MARKS, impAct2, impAct3);
+
+    private static class LevState {
+        byte[][] impTab;                /* level table pointer          */
+        short[] impAct;                 /* action map array             */
+        int startON;                    /* start of ON sequence         */
+        int startL2EN;                  /* start of level 2 sequence    */
+        int lastStrongRTL;              /* index of last found R or AL  */
+        int runStart;                   /* start position of the run    */
+        short state;                    /* current state                */
+        byte runLevel;                  /* run level before implicit solving */
+    }
+
+    /*------------------------------------------------------------------------*/
+
+    static final int FIRSTALLOC = 10;
+    /*
+     *  param pos:     position where to insert
+     *  param flag:    one of LRM_BEFORE, LRM_AFTER, RLM_BEFORE, RLM_AFTER
+     */
+    private void addPoint(int pos, int flag)
+    {
+        Point point = new Point();
+
+        int len = insertPoints.points.length;
+        if (len == 0) {
+            insertPoints.points = new Point[FIRSTALLOC];
+            len = FIRSTALLOC;
+        }
+        if (insertPoints.size >= len) { /* no room for new point */
+            Point[] savePoints = insertPoints.points;
+            insertPoints.points = new Point[len * 2];
+            System.arraycopy(savePoints, 0, insertPoints.points, 0, len);
+        }
+        point.pos = pos;
+        point.flag = flag;
+        insertPoints.points[insertPoints.size] = point;
+        insertPoints.size++;
+    }
+
+    private void setLevelsOutsideIsolates(int start, int limit, byte level)
+    {
+        byte dirProp;
+        int  isolateCount = 0, k;
+        for (k = start; k < limit; k++) {
+            dirProp = dirProps[k];
+            if (dirProp == PDI)
+                isolateCount--;
+            if (isolateCount == 0) {
+                levels[k] = level;
+            }
+            if (dirProp == LRI || dirProp == RLI)
+                isolateCount++;
+        }
+    }
+
+    /* perform rules (Wn), (Nn), and (In) on a run of the text ------------------ */
+
+    /*
+     * This implementation of the (Wn) rules applies all rules in one pass.
+     * In order to do so, it needs a look-ahead of typically 1 character
+     * (except for W5: sequences of ET) and keeps track of changes
+     * in a rule Wp that affect a later Wq (p<q).
+     *
+     * The (Nn) and (In) rules are also performed in that same single loop,
+     * but effectively one iteration behind for white space.
+     *
+     * Since all implicit rules are performed in one step, it is not necessary
+     * to actually store the intermediate directional properties in dirProps[].
+     */
+
+    private void processPropertySeq(LevState levState, short _prop,
+            int start, int limit) {
+        byte cell;
+        byte[][] impTab = levState.impTab;
+        short[] impAct = levState.impAct;
+        short oldStateSeq,actionSeq;
+        byte level, addLevel;
+        int start0, k;
+
+        start0 = start;                 /* save original start position */
+        oldStateSeq = levState.state;
+        cell = impTab[oldStateSeq][_prop];
+        levState.state = GetState(cell);        /* isolate the new state */
+        actionSeq = impAct[GetAction(cell)];    /* isolate the action */
+        addLevel = impTab[levState.state][IMPTABLEVELS_RES];
+
+        if (actionSeq != 0) {
+            switch (actionSeq) {
+            case 1:                     /* init ON seq */
+                levState.startON = start0;
+                break;
+
+            case 2:                     /* prepend ON seq to current seq */
+                start = levState.startON;
+                break;
+
+            case 3:                     /* EN/AN after R+ON */
+                level = (byte)(levState.runLevel + 1);
+                setLevelsOutsideIsolates(levState.startON, start0, level);
+                break;
+
+            case 4:                     /* EN/AN before R for NUMBERS_SPECIAL */
+                level = (byte)(levState.runLevel + 2);
+                setLevelsOutsideIsolates(levState.startON, start0, level);
+                break;
+
+            case 5:                     /* L or S after possible relevant EN/AN */
+                /* check if we had EN after R/AL */
+                if (levState.startL2EN >= 0) {
+                    addPoint(levState.startL2EN, LRM_BEFORE);
+                }
+                levState.startL2EN = -1;  /* not within previous if since could also be -2 */
+                /* check if we had any relevant EN/AN after R/AL */
+                if ((insertPoints.points.length == 0) ||
+                        (insertPoints.size <= insertPoints.confirmed)) {
+                    /* nothing, just clean up */
+                    levState.lastStrongRTL = -1;
+                    /* check if we have a pending conditional segment */
+                    level = impTab[oldStateSeq][IMPTABLEVELS_RES];
+                    if ((level & 1) != 0 && levState.startON > 0) { /* after ON */
+                        start = levState.startON;   /* reset to basic run level */
+                    }
+                    if (_prop == _S) {              /* add LRM before S */
+                        addPoint(start0, LRM_BEFORE);
+                        insertPoints.confirmed = insertPoints.size;
+                    }
+                    break;
+                }
+                /* reset previous RTL cont to level for LTR text */
+                for (k = levState.lastStrongRTL + 1; k < start0; k++) {
+                    /* reset odd level, leave runLevel+2 as is */
+                    levels[k] = (byte)((levels[k] - 2) & ~1);
+                }
+                /* mark insert points as confirmed */
+                insertPoints.confirmed = insertPoints.size;
+                levState.lastStrongRTL = -1;
+                if (_prop == _S) {           /* add LRM before S */
+                    addPoint(start0, LRM_BEFORE);
+                    insertPoints.confirmed = insertPoints.size;
+                }
+                break;
+
+            case 6:                     /* R/AL after possible relevant EN/AN */
+                /* just clean up */
+                if (insertPoints.points.length > 0)
+                    /* remove all non confirmed insert points */
+                    insertPoints.size = insertPoints.confirmed;
+                levState.startON = -1;
+                levState.startL2EN = -1;
+                levState.lastStrongRTL = limit - 1;
+                break;
+
+            case 7:                     /* EN/AN after R/AL + possible cont */
+                /* check for real AN */
+
+                if ((_prop == _AN) && (dirProps[start0] == AN) &&
+                (reorderingMode != REORDER_INVERSE_FOR_NUMBERS_SPECIAL))
+                {
+                    /* real AN */
+                    if (levState.startL2EN == -1) { /* if no relevant EN already found */
+                        /* just note the rightmost digit as a strong RTL */
+                        levState.lastStrongRTL = limit - 1;
+                        break;
+                    }
+                    if (levState.startL2EN >= 0)  { /* after EN, no AN */
+                        addPoint(levState.startL2EN, LRM_BEFORE);
+                        levState.startL2EN = -2;
+                    }
+                    /* note AN */
+                    addPoint(start0, LRM_BEFORE);
+                    break;
+                }
+                /* if first EN/AN after R/AL */
+                if (levState.startL2EN == -1) {
+                    levState.startL2EN = start0;
+                }
+                break;
+
+            case 8:                     /* note location of latest R/AL */
+                levState.lastStrongRTL = limit - 1;
+                levState.startON = -1;
+                break;
+
+            case 9:                     /* L after R+ON/EN/AN */
+                /* include possible adjacent number on the left */
+                for (k = start0-1; k >= 0 && ((levels[k] & 1) == 0); k--) {
+                }
+                if (k >= 0) {
+                    addPoint(k, RLM_BEFORE);    /* add RLM before */
+                    insertPoints.confirmed = insertPoints.size; /* confirm it */
+                }
+                levState.startON = start0;
+                break;
+
+            case 10:                    /* AN after L */
+                /* AN numbers between L text on both sides may be trouble. */
+                /* tentatively bracket with LRMs; will be confirmed if followed by L */
+                addPoint(start0, LRM_BEFORE);   /* add LRM before */
+                addPoint(start0, LRM_AFTER);    /* add LRM after  */
+                break;
+
+            case 11:                    /* R after L+ON/EN/AN */
+                /* false alert, infirm LRMs around previous AN */
+                insertPoints.size=insertPoints.confirmed;
+                if (_prop == _S) {          /* add RLM before S */
+                    addPoint(start0, RLM_BEFORE);
+                    insertPoints.confirmed = insertPoints.size;
+                }
+                break;
+
+            case 12:                    /* L after L+ON/AN */
+                level = (byte)(levState.runLevel + addLevel);
+                for (k=levState.startON; k < start0; k++) {
+                    if (levels[k] < level) {
+                        levels[k] = level;
+                    }
+                }
+                insertPoints.confirmed = insertPoints.size;   /* confirm inserts */
+                levState.startON = start0;
+                break;
+
+            case 13:                    /* L after L+ON+EN/AN/ON */
+                level = levState.runLevel;
+                for (k = start0-1; k >= levState.startON; k--) {
+                    if (levels[k] == level+3) {
+                        while (levels[k] == level+3) {
+                            levels[k--] -= 2;
+                        }
+                        while (levels[k] == level) {
+                            k--;
+                        }
+                    }
+                    if (levels[k] == level+2) {
+                        levels[k] = level;
+                        continue;
+                    }
+                    levels[k] = (byte)(level+1);
+                }
+                break;
+
+            case 14:                    /* R after L+ON+EN/AN/ON */
+                level = (byte)(levState.runLevel+1);
+                for (k = start0-1; k >= levState.startON; k--) {
+                    if (levels[k] > level) {
+                        levels[k] -= 2;
+                    }
+                }
+                break;
+
+            default:                        /* we should never get here */
+                throw new IllegalStateException("Internal ICU error in processPropertySeq");
+            }
+        }
+        if ((addLevel) != 0 || (start < start0)) {
+            level = (byte)(levState.runLevel + addLevel);
+            if (start >= levState.runStart) {
+                for (k = start; k < limit; k++) {
+                    levels[k] = level;
+                }
+            } else {
+                setLevelsOutsideIsolates(start, limit, level);
+            }
+        }
+    }
+
+    private void resolveImplicitLevels(int start, int limit, short sor, short eor)
+    {
+        byte dirProp;
+        LevState levState = new LevState();
+        int i, start1, start2;
+        short oldStateImp, stateImp, actionImp;
+        short gprop, resProp, cell;
+        boolean inverseRTL;
+        short nextStrongProp = R;
+        int nextStrongPos = -1;
+
+        /* check for RTL inverse Bidi mode */
+        /* FOOD FOR THOUGHT: in case of RTL inverse Bidi, it would make sense to
+         * loop on the text characters from end to start.
+         * This would need a different properties state table (at least different
+         * actions) and different levels state tables (maybe very similar to the
+         * LTR corresponding ones.
+         */
+        inverseRTL=((start<lastArabicPos) && ((GetParaLevelAt(start) & 1)>0) &&
+                    (reorderingMode == REORDER_INVERSE_LIKE_DIRECT  ||
+                     reorderingMode == REORDER_INVERSE_FOR_NUMBERS_SPECIAL));
+        /* initialize for property and levels state table */
+        levState.startL2EN = -1;        /* used for INVERSE_LIKE_DIRECT_WITH_MARKS */
+        levState.lastStrongRTL = -1;    /* used for INVERSE_LIKE_DIRECT_WITH_MARKS */
+        levState.runStart = start;
+        levState.runLevel = levels[start];
+        levState.impTab = impTabPair.imptab[levState.runLevel & 1];
+        levState.impAct = impTabPair.impact[levState.runLevel & 1];
+
+        /* The isolates[] entries contain enough information to
+           resume the bidi algorithm in the same state as it was
+           when it was interrupted by an isolate sequence. */
+        if (dirProps[start] == PDI) {
+            levState.startON = isolates[isolateCount].startON;
+            start1 = isolates[isolateCount].start1;
+            stateImp = isolates[isolateCount].stateImp;
+            levState.state = isolates[isolateCount].state;
+            isolateCount--;
+        } else {
+            levState.startON = -1;
+            start1 = start;
+            if (dirProps[start] == NSM)
+              stateImp = (short)(1 + sor);
+            else
+                stateImp = 0;
+            levState.state = 0;
+            processPropertySeq(levState, sor, start, start);
+        }
+        start2 = start;                 /* to make the Java compiler happy */
+
+        for (i = start; i <= limit; i++) {
+            if (i >= limit) {
+                int k;
+                for (k = limit - 1;
+                     k > start &&
+                         (DirPropFlag(dirProps[k]) & MASK_BN_EXPLICIT) != 0;
+                     k--);
+                dirProp = dirProps[k];
+                if (dirProp == LRI || dirProp == RLI)
+                    break;  /* no forced closing for sequence ending with LRI/RLI */
+                gprop = eor;
+            } else {
+                byte prop, prop1;
+                prop = dirProps[i];
+                if (prop == B)
+                    isolateCount = -1;  /* current isolates stack entry == none */
+                if (inverseRTL) {
+                    if (prop == AL) {
+                        /* AL before EN does not make it AN */
+                        prop = R;
+                    } else if (prop == EN) {
+                        if (nextStrongPos <= i) {
+                            /* look for next strong char (L/R/AL) */
+                            int j;
+                            nextStrongProp = R;     /* set default */
+                            nextStrongPos = limit;
+                            for (j = i+1; j < limit; j++) {
+                                prop1 = dirProps[j];
+                                if (prop1 == L || prop1 == R || prop1 == AL) {
+                                    nextStrongProp = prop1;
+                                    nextStrongPos = j;
+                                    break;
+                                }
+                            }
+                        }
+                        if (nextStrongProp == AL) {
+                            prop = AN;
+                        }
+                    }
+                }
+                gprop = groupProp[prop];
+            }
+            oldStateImp = stateImp;
+            cell = impTabProps[oldStateImp][gprop];
+            stateImp = GetStateProps(cell);     /* isolate the new state */
+            actionImp = GetActionProps(cell);   /* isolate the action */
+            if ((i == limit) && (actionImp == 0)) {
+                /* there is an unprocessed sequence if its property == eor   */
+                actionImp = 1;                  /* process the last sequence */
+            }
+            if (actionImp != 0) {
+                resProp = impTabProps[oldStateImp][IMPTABPROPS_RES];
+                switch (actionImp) {
+                case 1:             /* process current seq1, init new seq1 */
+                    processPropertySeq(levState, resProp, start1, i);
+                    start1 = i;
+                    break;
+                case 2:             /* init new seq2 */
+                    start2 = i;
+                    break;
+                case 3:             /* process seq1, process seq2, init new seq1 */
+                    processPropertySeq(levState, resProp, start1, start2);
+                    processPropertySeq(levState, _ON, start2, i);
+                    start1 = i;
+                    break;
+                case 4:             /* process seq1, set seq1=seq2, init new seq2 */
+                    processPropertySeq(levState, resProp, start1, start2);
+                    start1 = start2;
+                    start2 = i;
+                    break;
+                default:            /* we should never get here */
+                    throw new IllegalStateException("Internal ICU error in resolveImplicitLevels");
+                }
+            }
+        }
+
+        /* look for the last char not a BN or LRE/RLE/LRO/RLO/PDF */
+        for (i = limit - 1;
+             i > start &&
+                 (DirPropFlag(dirProps[i]) & MASK_BN_EXPLICIT) != 0;
+             i--);
+        dirProp = dirProps[i];
+        if ((dirProp == LRI || dirProp == RLI) && limit < length) {
+            isolateCount++;
+            if (isolates[isolateCount] == null)
+                isolates[isolateCount] = new Isolate();
+            isolates[isolateCount].stateImp = stateImp;
+            isolates[isolateCount].state = levState.state;
+            isolates[isolateCount].start1 = start1;
+            isolates[isolateCount].startON = levState.startON;
+        }
+        else
+            processPropertySeq(levState, eor, limit, limit);
+    }
+
+    /* perform (L1) and (X9) ---------------------------------------------------- */
+
+    /*
+     * Reset the embedding levels for some non-graphic characters (L1).
+     * This method also sets appropriate levels for BN, and
+     * explicit embedding types that are supposed to have been removed
+     * from the paragraph in (X9).
+     */
+    private void adjustWSLevels() {
+        int i;
+
+        if ((flags & MASK_WS) != 0) {
+            int flag;
+            i = trailingWSStart;
+            while (i > 0) {
+                /* reset a sequence of WS/BN before eop and B/S to the paragraph paraLevel */
+                while (i > 0 && ((flag = DirPropFlag(dirProps[--i])) & MASK_WS) != 0) {
+                    if (orderParagraphsLTR && (flag & DirPropFlag(B)) != 0) {
+                        levels[i] = 0;
+                    } else {
+                        levels[i] = GetParaLevelAt(i);
+                    }
+                }
+
+                /* reset BN to the next character's paraLevel until B/S, which restarts above loop */
+                /* here, i+1 is guaranteed to be <length */
+                while (i > 0) {
+                    flag = DirPropFlag(dirProps[--i]);
+                    if ((flag & MASK_BN_EXPLICIT) != 0) {
+                        levels[i] = levels[i + 1];
+                    } else if (orderParagraphsLTR && (flag & DirPropFlag(B)) != 0) {
+                        levels[i] = 0;
+                        break;
+                    } else if ((flag & MASK_B_S) != 0){
+                        levels[i] = GetParaLevelAt(i);
+                        break;
+                    }
+                }
+            }
+        }
+    }
+
+    private void setParaSuccess() {
+        paraBidi = this;                /* mark successful setPara */
+    }
+
+    private int Bidi_Min(int x, int y) {
+        return x < y ? x : y;
+    }
+
+    private int Bidi_Abs(int x) {
+        return x >= 0 ? x : -x;
+    }
+
+    void setParaRunsOnly(char[] parmText, byte parmParaLevel) {
+        int[] visualMap;
+        String visualText;
+        int saveLength, saveTrailingWSStart;
+        byte[] saveLevels;
+        byte saveDirection;
+        int i, j, visualStart, logicalStart,
+            oldRunCount, runLength, addedRuns, insertRemove,
+            start, limit, step, indexOddBit, logicalPos,
+            index, index1;
+        int saveOptions;
+
+        reorderingMode = REORDER_DEFAULT;
+        int parmLength = parmText.length;
+        if (parmLength == 0) {
+            setPara(parmText, parmParaLevel, null);
+            reorderingMode = REORDER_RUNS_ONLY;
+            return;
+        }
+        /* obtain memory for mapping table and visual text */
+        saveOptions = reorderingOptions;
+        if ((saveOptions & OPTION_INSERT_MARKS) > 0) {
+            reorderingOptions &= ~OPTION_INSERT_MARKS;
+            reorderingOptions |= OPTION_REMOVE_CONTROLS;
+        }
+        parmParaLevel &= 1;             /* accept only 0 or 1 */
+        setPara(parmText, parmParaLevel, null);
+        /* we cannot access directly levels since it is not yet set if
+         * direction is not MIXED
+         */
+        saveLevels = new byte[this.length];
+        System.arraycopy(getLevels(), 0, saveLevels, 0, this.length);
+        saveTrailingWSStart = trailingWSStart;
+
+        /* FOOD FOR THOUGHT: instead of writing the visual text, we could use
+         * the visual map and the dirProps array to drive the second call
+         * to setPara (but must make provision for possible removal of
+         * Bidi controls.  Alternatively, only use the dirProps array via
+         * customized classifier callback.
+         */
+        visualText = writeReordered(DO_MIRRORING);
+        visualMap = getVisualMap();
+        this.reorderingOptions = saveOptions;
+        saveLength = this.length;
+        saveDirection=this.direction;
+
+        this.reorderingMode = REORDER_INVERSE_LIKE_DIRECT;
+        parmParaLevel ^= 1;
+        setPara(visualText, parmParaLevel, null);
+        BidiLine.getRuns(this);
+        /* check if some runs must be split, count how many splits */
+        addedRuns = 0;
+        oldRunCount = this.runCount;
+        visualStart = 0;
+        for (i = 0; i < oldRunCount; i++, visualStart += runLength) {
+            runLength = runs[i].limit - visualStart;
+            if (runLength < 2) {
+                continue;
+            }
+            logicalStart = runs[i].start;
+            for (j = logicalStart+1; j < logicalStart+runLength; j++) {
+                index = visualMap[j];
+                index1 = visualMap[j-1];
+                if ((Bidi_Abs(index-index1)!=1) || (saveLevels[index]!=saveLevels[index1])) {
+                    addedRuns++;
+                }
+            }
+        }
+        if (addedRuns > 0) {
+            getRunsMemory(oldRunCount + addedRuns);
+            if (runCount == 1) {
+                /* because we switch from UBiDi.simpleRuns to UBiDi.runs */
+                runsMemory[0] = runs[0];
+            } else {
+                System.arraycopy(runs, 0, runsMemory, 0, runCount);
+            }
+            runs = runsMemory;
+            runCount += addedRuns;
+            for (i = oldRunCount; i < runCount; i++) {
+                if (runs[i] == null) {
+                    runs[i] = new BidiRun(0, 0, (byte)0);
+                }
+            }
+        }
+        /* split runs which are not consecutive in source text */
+        int newI;
+        for (i = oldRunCount-1; i >= 0; i--) {
+            newI = i + addedRuns;
+            runLength = i==0 ? runs[0].limit :
+                               runs[i].limit - runs[i-1].limit;
+            logicalStart = runs[i].start;
+            indexOddBit = runs[i].level & 1;
+            if (runLength < 2) {
+                if (addedRuns > 0) {
+                    runs[newI].copyFrom(runs[i]);
+                }
+                logicalPos = visualMap[logicalStart];
+                runs[newI].start = logicalPos;
+                runs[newI].level = (byte)(saveLevels[logicalPos] ^ indexOddBit);
+                continue;
+            }
+            if (indexOddBit > 0) {
+                start = logicalStart;
+                limit = logicalStart + runLength - 1;
+                step = 1;
+            } else {
+                start = logicalStart + runLength - 1;
+                limit = logicalStart;
+                step = -1;
+            }
+            for (j = start; j != limit; j += step) {
+                index = visualMap[j];
+                index1 = visualMap[j+step];
+                if ((Bidi_Abs(index-index1)!=1) || (saveLevels[index]!=saveLevels[index1])) {
+                    logicalPos = Bidi_Min(visualMap[start], index);
+                    runs[newI].start = logicalPos;
+                    runs[newI].level = (byte)(saveLevels[logicalPos] ^ indexOddBit);
+                    runs[newI].limit = runs[i].limit;
+                    runs[i].limit -= Bidi_Abs(j - start) + 1;
+                    insertRemove = runs[i].insertRemove & (LRM_AFTER|RLM_AFTER);
+                    runs[newI].insertRemove = insertRemove;
+                    runs[i].insertRemove &= ~insertRemove;
+                    start = j + step;
+                    addedRuns--;
+                    newI--;
+                }
+            }
+            if (addedRuns > 0) {
+                runs[newI].copyFrom(runs[i]);
+            }
+            logicalPos = Bidi_Min(visualMap[start], visualMap[limit]);
+            runs[newI].start = logicalPos;
+            runs[newI].level = (byte)(saveLevels[logicalPos] ^ indexOddBit);
+        }
+
+    cleanup1:
+        /* restore initial paraLevel */
+        this.paraLevel ^= 1;
+    cleanup2:
+        /* restore real text */
+        this.text = parmText;
+        this.length = saveLength;
+        this.originalLength = parmLength;
+        this.direction=saveDirection;
+        this.levels = saveLevels;
+        this.trailingWSStart = saveTrailingWSStart;
+        if (runCount > 1) {
+            this.direction = MIXED;
+        }
+    cleanup3:
+        this.reorderingMode = REORDER_RUNS_ONLY;
+    }
+
+    /**
+     * Perform the Unicode Bidi algorithm. It is defined in the
+     * <a href="https://www.unicode.org/reports/tr9/">Unicode Standard Annex #9:
+     * Unicode Bidirectional Algorithm</a>, version 13,
+     * also described in The Unicode Standard, Version 4.0 .<p>
+     *
+     * This method takes a piece of plain text containing one or more paragraphs,
+     * with or without externally specified embedding levels from <i>styled</i>
+     * text and computes the left-right-directionality of each character.<p>
+     *
+     * If the entire text is all of the same directionality, then
+     * the method may not perform all the steps described by the algorithm,
+     * i.e., some levels may not be the same as if all steps were performed.
+     * This is not relevant for unidirectional text.<br>
+     * For example, in pure LTR text with numbers the numbers would get
+     * a resolved level of 2 higher than the surrounding text according to
+     * the algorithm. This implementation may set all resolved levels to
+     * the same value in such a case.<p>
+     *
+     * The text can be composed of multiple paragraphs. Occurrence of a block
+     * separator in the text terminates a paragraph, and whatever comes next starts
+     * a new paragraph. The exception to this rule is when a Carriage Return (CR)
+     * is followed by a Line Feed (LF). Both CR and LF are block separators, but
+     * in that case, the pair of characters is considered as terminating the
+     * preceding paragraph, and a new paragraph will be started by a character
+     * coming after the LF.
+     *
+     * Although the text is passed here as a <code>String</code>, it is
+     * stored internally as an array of characters. Therefore the
+     * documentation will refer to indexes of the characters in the text.
+     *
+     * @param text contains the text that the Bidi algorithm will be performed
+     *        on. This text can be retrieved with <code>getText()</code> or
+     *        <code>getTextAsString</code>.<br>
+     *
+     * @param paraLevel specifies the default level for the text;
+     *        it is typically 0 (LTR) or 1 (RTL).
+     *        If the method shall determine the paragraph level from the text,
+     *        then <code>paraLevel</code> can be set to
+     *        either <code>LEVEL_DEFAULT_LTR</code>
+     *        or <code>LEVEL_DEFAULT_RTL</code>; if the text contains multiple
+     *        paragraphs, the paragraph level shall be determined separately for
+     *        each paragraph; if a paragraph does not include any strongly typed
+     *        character, then the desired default is used (0 for LTR or 1 for RTL).
+     *        Any other value between 0 and <code>MAX_EXPLICIT_LEVEL</code>
+     *        is also valid, with odd levels indicating RTL.
+     *
+     * @param embeddingLevels (in) may be used to preset the embedding and override levels,
+     *        ignoring characters like LRE and PDF in the text.
+     *        A level overrides the directional property of its corresponding
+     *        (same index) character if the level has the
+     *        <code>LEVEL_OVERRIDE</code> bit set.<br><br>
+     *        Except for that bit, it must be
+     *        <code>paraLevel<=embeddingLevels[]<=MAX_EXPLICIT_LEVEL</code>,
+     *        with one exception: a level of zero may be specified for a
+     *        paragraph separator even if <code>paraLevel&gt;0</code> when multiple
+     *        paragraphs are submitted in the same call to <code>setPara()</code>.<br><br>
+     *        <strong>Caution: </strong>A reference to this array, not a copy
+     *        of the levels, will be stored in the <code>Bidi</code> object;
+     *        the <code>embeddingLevels</code>
+     *        should not be modified to avoid unexpected results on subsequent
+     *        Bidi operations. However, the <code>setPara()</code> and
+     *        <code>setLine()</code> methods may modify some or all of the
+     *        levels.<br><br>
+     *        <strong>Note:</strong> the <code>embeddingLevels</code> array must
+     *        have one entry for each character in <code>text</code>.
+     *
+     * @throws IllegalArgumentException if the values in embeddingLevels are
+     *         not within the allowed range
+     *
+     * @see #LEVEL_DEFAULT_LTR
+     * @see #LEVEL_DEFAULT_RTL
+     * @see #LEVEL_OVERRIDE
+     * @see #MAX_EXPLICIT_LEVEL
+     * @stable ICU 3.8
+     */
+    void setPara(String text, byte paraLevel, byte[] embeddingLevels)
+    {
+        if (text == null) {
+            setPara(new char[0], paraLevel, embeddingLevels);
+        } else {
+            setPara(text.toCharArray(), paraLevel, embeddingLevels);
+        }
+    }
+
+    /**
+     * Perform the Unicode Bidi algorithm. It is defined in the
+     * <a href="https://www.unicode.org/reports/tr9/">Unicode Standard Annex #9:
+     * Unicode Bidirectional Algorithm</a>, version 13,
+     * also described in The Unicode Standard, Version 4.0 .<p>
+     *
+     * This method takes a piece of plain text containing one or more paragraphs,
+     * with or without externally specified embedding levels from <i>styled</i>
+     * text and computes the left-right-directionality of each character.<p>
+     *
+     * If the entire text is all of the same directionality, then
+     * the method may not perform all the steps described by the algorithm,
+     * i.e., some levels may not be the same as if all steps were performed.
+     * This is not relevant for unidirectional text.<br>
+     * For example, in pure LTR text with numbers the numbers would get
+     * a resolved level of 2 higher than the surrounding text according to
+     * the algorithm. This implementation may set all resolved levels to
+     * the same value in such a case.
+     *
+     * The text can be composed of multiple paragraphs. Occurrence of a block
+     * separator in the text terminates a paragraph, and whatever comes next starts
+     * a new paragraph. The exception to this rule is when a Carriage Return (CR)
+     * is followed by a Line Feed (LF). Both CR and LF are block separators, but
+     * in that case, the pair of characters is considered as terminating the
+     * preceding paragraph, and a new paragraph will be started by a character
+     * coming after the LF.
+     *
+     * The text is stored internally as an array of characters. Therefore the
+     * documentation will refer to indexes of the characters in the text.
+     *
+     * @param chars contains the text that the Bidi algorithm will be performed
+     *        on. This text can be retrieved with <code>getText()</code> or
+     *        <code>getTextAsString</code>.<br>
+     *
+     * @param paraLevel specifies the default level for the text;
+     *        it is typically 0 (LTR) or 1 (RTL).
+     *        If the method shall determine the paragraph level from the text,
+     *        then <code>paraLevel</code> can be set to
+     *        either <code>LEVEL_DEFAULT_LTR</code>
+     *        or <code>LEVEL_DEFAULT_RTL</code>; if the text contains multiple
+     *        paragraphs, the paragraph level shall be determined separately for
+     *        each paragraph; if a paragraph does not include any strongly typed
+     *        character, then the desired default is used (0 for LTR or 1 for RTL).
+     *        Any other value between 0 and <code>MAX_EXPLICIT_LEVEL</code>
+     *        is also valid, with odd levels indicating RTL.
+     *
+     * @param embeddingLevels (in) may be used to preset the embedding and
+     *        override levels, ignoring characters like LRE and PDF in the text.
+     *        A level overrides the directional property of its corresponding
+     *        (same index) character if the level has the
+     *        <code>LEVEL_OVERRIDE</code> bit set.<br><br>
+     *        Except for that bit, it must be
+     *        <code>paraLevel<=embeddingLevels[]<=MAX_EXPLICIT_LEVEL</code>,
+     *        with one exception: a level of zero may be specified for a
+     *        paragraph separator even if <code>paraLevel&gt;0</code> when multiple
+     *        paragraphs are submitted in the same call to <code>setPara()</code>.<br><br>
+     *        <strong>Caution: </strong>A reference to this array, not a copy
+     *        of the levels, will be stored in the <code>Bidi</code> object;
+     *        the <code>embeddingLevels</code>
+     *        should not be modified to avoid unexpected results on subsequent
+     *        Bidi operations. However, the <code>setPara()</code> and
+     *        <code>setLine()</code> methods may modify some or all of the
+     *        levels.<br><br>
+     *        <strong>Note:</strong> the <code>embeddingLevels</code> array must
+     *        have one entry for each character in <code>text</code>.
+     *
+     * @throws IllegalArgumentException if the values in embeddingLevels are
+     *         not within the allowed range
+     *
+     * @see #LEVEL_DEFAULT_LTR
+     * @see #LEVEL_DEFAULT_RTL
+     * @see #LEVEL_OVERRIDE
+     * @see #MAX_EXPLICIT_LEVEL
+     * @stable ICU 3.8
+     */
+    void setPara(char[] chars, byte paraLevel, byte[] embeddingLevels)
+    {
+        /* check the argument values */
+        if (paraLevel < LEVEL_DEFAULT_LTR) {
+            verifyRange(paraLevel, 0, MAX_EXPLICIT_LEVEL + 1);
+        }
+        if (chars == null) {
+            chars = new char[0];
+        }
+
+        /* special treatment for RUNS_ONLY mode */
+        if (reorderingMode == REORDER_RUNS_ONLY) {
+            setParaRunsOnly(chars, paraLevel);
+            return;
+        }
+
+        /* initialize the Bidi object */
+        this.paraBidi = null;          /* mark unfinished setPara */
+        this.text = chars;
+        this.length = this.originalLength = this.resultLength = text.length;
+        this.paraLevel = paraLevel;
+        this.direction = (byte)(paraLevel & 1);
+        this.paraCount = 1;
+
+        /* Allocate zero-length arrays instead of setting to null here; then
+         * checks for null in various places can be eliminated.
+         */
+        dirProps = new byte[0];
+        levels = new byte[0];
+        runs = new BidiRun[0];
+        isGoodLogicalToVisualRunsMap = false;
+        insertPoints.size = 0;          /* clean up from last call */
+        insertPoints.confirmed = 0;     /* clean up from last call */
+
+        /*
+         * Save the original paraLevel if contextual; otherwise, set to 0.
+         */
+        defaultParaLevel = IsDefaultLevel(paraLevel) ? paraLevel : 0;
+
+        if (length == 0) {
+            /*
+             * For an empty paragraph, create a Bidi object with the paraLevel and
+             * the flags and the direction set but without allocating zero-length arrays.
+             * There is nothing more to do.
+             */
+            if (IsDefaultLevel(paraLevel)) {
+                this.paraLevel &= 1;
+                defaultParaLevel = 0;
+            }
+            flags = DirPropFlagLR(paraLevel);
+            runCount = 0;
+            paraCount = 0;
+            setParaSuccess();
+            return;
+        }
+
+        runCount = -1;
+
+        /*
+         * Get the directional properties,
+         * the flags bit-set, and
+         * determine the paragraph level if necessary.
+         */
+        getDirPropsMemory(length);
+        dirProps = dirPropsMemory;
+        getDirProps();
+        /* the processed length may have changed if OPTION_STREAMING is set */
+        trailingWSStart = length;  /* the levels[] will reflect the WS run */
+
+        /* are explicit levels specified? */
+        if (embeddingLevels == null) {
+            /* no: determine explicit levels according to the (Xn) rules */
+            getLevelsMemory(length);
+            levels = levelsMemory;
+            direction = resolveExplicitLevels();
+        } else {
+            /* set BN for all explicit codes, check that all levels are 0 or paraLevel..MAX_EXPLICIT_LEVEL */
+            levels = embeddingLevels;
+            direction = checkExplicitLevels();
+        }
+
+        /* allocate isolate memory */
+        if (isolateCount > 0) {
+            if (isolates == null || isolates.length < isolateCount)
+                isolates = new Isolate[isolateCount + 3];   /* keep some reserve */
+        }
+        isolateCount = -1;              /* current isolates stack entry == none */
+
+        /*
+         * The steps after (X9) in the Bidi algorithm are performed only if
+         * the paragraph text has mixed directionality!
+         */
+        switch (direction) {
+        case LTR:
+            /* all levels are implicitly at paraLevel (important for getLevels()) */
+            trailingWSStart = 0;
+            break;
+        case RTL:
+            /* all levels are implicitly at paraLevel (important for getLevels()) */
+            trailingWSStart = 0;
+            break;
+        default:
+            /*
+             *  Choose the right implicit state table
+             */
+            switch(reorderingMode) {
+            case REORDER_DEFAULT:
+                this.impTabPair = impTab_DEFAULT;
+                break;
+            case REORDER_NUMBERS_SPECIAL:
+                this.impTabPair = impTab_NUMBERS_SPECIAL;
+                break;
+            case REORDER_GROUP_NUMBERS_WITH_R:
+                this.impTabPair = impTab_GROUP_NUMBERS_WITH_R;
+                break;
+            case REORDER_RUNS_ONLY:
+                /* we should never get here */
+                throw new InternalError("Internal ICU error in setPara");
+                /* break; */
+            case REORDER_INVERSE_NUMBERS_AS_L:
+                this.impTabPair = impTab_INVERSE_NUMBERS_AS_L;
+                break;
+            case REORDER_INVERSE_LIKE_DIRECT:
+                if ((reorderingOptions & OPTION_INSERT_MARKS) != 0) {
+                    this.impTabPair = impTab_INVERSE_LIKE_DIRECT_WITH_MARKS;
+                } else {
+                    this.impTabPair = impTab_INVERSE_LIKE_DIRECT;
+                }
+                break;
+            case REORDER_INVERSE_FOR_NUMBERS_SPECIAL:
+                if ((reorderingOptions & OPTION_INSERT_MARKS) != 0) {
+                    this.impTabPair = impTab_INVERSE_FOR_NUMBERS_SPECIAL_WITH_MARKS;
+                } else {
+                    this.impTabPair = impTab_INVERSE_FOR_NUMBERS_SPECIAL;
+                }
+                break;
+            }
+            /*
+             * If there are no external levels specified and there
+             * are no significant explicit level codes in the text,
+             * then we can treat the entire paragraph as one run.
+             * Otherwise, we need to perform the following rules on runs of
+             * the text with the same embedding levels. (X10)
+             * "Significant" explicit level codes are ones that actually
+             * affect non-BN characters.
+             * Examples for "insignificant" ones are empty embeddings
+             * LRE-PDF, LRE-RLE-PDF-PDF, etc.
+             */
+            if (embeddingLevels == null && paraCount <= 1 &&
+                (flags & DirPropFlagMultiRuns) == 0) {
+                resolveImplicitLevels(0, length,
+                        GetLRFromLevel(GetParaLevelAt(0)),
+                        GetLRFromLevel(GetParaLevelAt(length - 1)));
+            } else {
+                /* sor, eor: start and end types of same-level-run */
+                int start, limit = 0;
+                byte level, nextLevel;
+                short sor, eor;
+
+                /* determine the first sor and set eor to it because of the loop body (sor=eor there) */
+                level = GetParaLevelAt(0);
+                nextLevel = levels[0];
+                if (level < nextLevel) {
+                    eor = GetLRFromLevel(nextLevel);
+                } else {
+                    eor = GetLRFromLevel(level);
+                }
+
+                do {
+                    /* determine start and limit of the run (end points just behind the run) */
+
+                    /* the values for this run's start are the same as for the previous run's end */
+                    start = limit;
+                    level = nextLevel;
+                    if ((start > 0) && (dirProps[start - 1] == B)) {
+                        /* except if this is a new paragraph, then set sor = para level */
+                        sor = GetLRFromLevel(GetParaLevelAt(start));
+                    } else {
+                        sor = eor;
+                    }
+
+                    /* search for the limit of this run */
+                    while ((++limit < length) &&
+                           ((levels[limit] == level) ||
+                            ((DirPropFlag(dirProps[limit]) & MASK_BN_EXPLICIT) != 0))) {}
+
+                    /* get the correct level of the next run */
+                    if (limit < length) {
+                        nextLevel = levels[limit];
+                    } else {
+                        nextLevel = GetParaLevelAt(length - 1);
+                    }
+
+                    /* determine eor from max(level, nextLevel); sor is last run's eor */
+                    if (NoOverride(level) < NoOverride(nextLevel)) {
+                        eor = GetLRFromLevel(nextLevel);
+                    } else {
+                        eor = GetLRFromLevel(level);
+                    }
+
+                    /* if the run consists of overridden directional types, then there
+                       are no implicit types to be resolved */
+                    if ((level & LEVEL_OVERRIDE) == 0) {
+                        resolveImplicitLevels(start, limit, sor, eor);
+                    } else {
+                        /* remove the LEVEL_OVERRIDE flags */
+                        do {
+                            levels[start++] &= ~LEVEL_OVERRIDE;
+                        } while (start < limit);
+                    }
+                } while (limit  < length);
+            }
+
+            /* reset the embedding levels for some non-graphic characters (L1), (X9) */
+            adjustWSLevels();
+
+            break;
+        }
+
+        /* add RLM for inverse Bidi with contextual orientation resolving
+         * to RTL which would not round-trip otherwise
+         */
+        if ((defaultParaLevel > 0) &&
+            ((reorderingOptions & OPTION_INSERT_MARKS) != 0) &&
+            ((reorderingMode == REORDER_INVERSE_LIKE_DIRECT) ||
+             (reorderingMode == REORDER_INVERSE_FOR_NUMBERS_SPECIAL))) {
+            int start, last;
+            byte level;
+            byte dirProp;
+            for (int i = 0; i < paraCount; i++) {
+                last = paras_limit[i] - 1;
+                level = paras_level[i];
+                if (level == 0)
+                    continue;           /* LTR paragraph */
+                start = i == 0 ? 0 : paras_limit[i - 1];
+                for (int j = last; j >= start; j--) {
+                    dirProp = dirProps[j];
+                    if (dirProp == L) {
+                        if (j < last) {
+                            while (dirProps[last] == B) {
+                                last--;
+                            }
+                        }
+                        addPoint(last, RLM_BEFORE);
+                        break;
+                    }
+                    if ((DirPropFlag(dirProp) & MASK_R_AL) != 0) {
+                        break;
+                    }
+                }
+            }
+        }
+
+        if ((reorderingOptions & OPTION_REMOVE_CONTROLS) != 0) {
+            resultLength -= controlCount;
+        } else {
+            resultLength += insertPoints.size;
+        }
+        setParaSuccess();
+    }
+
+    /**
+     * Perform the Unicode Bidi algorithm on a given paragraph, as defined in the
+     * <a href="https://www.unicode.org/reports/tr9/">Unicode Standard Annex #9:
+     * Unicode Bidirectional Algorithm</a>, version 13,
+     * also described in The Unicode Standard, Version 4.0 .<p>
+     *
+     * This method takes a paragraph of text and computes the
+     * left-right-directionality of each character. The text should not
+     * contain any Unicode block separators.<p>
+     *
+     * The RUN_DIRECTION attribute in the text, if present, determines the base
+     * direction (left-to-right or right-to-left). If not present, the base
+     * direction is computed using the Unicode Bidirectional Algorithm,
+     * defaulting to left-to-right if there are no strong directional characters
+     * in the text. This attribute, if present, must be applied to all the text
+     * in the paragraph.<p>
+     *
+     * The BIDI_EMBEDDING attribute in the text, if present, represents
+     * embedding level information. Negative values from -1 to -62 indicate
+     * overrides at the absolute value of the level. Positive values from 1 to
+     * 62 indicate embeddings. Where values are zero or not defined, the base
+     * embedding level as determined by the base direction is assumed.<p>
+     *
+     * The NUMERIC_SHAPING attribute in the text, if present, converts European
+     * digits to other decimal digits before running the bidi algorithm. This
+     * attribute, if present, must be applied to all the text in the paragraph.
+     *
+     * If the entire text is all of the same directionality, then
+     * the method may not perform all the steps described by the algorithm,
+     * i.e., some levels may not be the same as if all steps were performed.
+     * This is not relevant for unidirectional text.<br>
+     * For example, in pure LTR text with numbers the numbers would get
+     * a resolved level of 2 higher than the surrounding text according to
+     * the algorithm. This implementation may set all resolved levels to
+     * the same value in such a case.<p>
+     *
+     * @param paragraph a paragraph of text with optional character and
+     *        paragraph attribute information
+     * @stable ICU 3.8
+     */
+    public void setPara(AttributedCharacterIterator paragraph)
+    {
+        byte paraLvl;
+        char ch = paragraph.first();
+        Boolean runDirection =
+          (Boolean) paragraph.getAttribute(TextAttributeConstants.RUN_DIRECTION);
+        Object shaper = paragraph.getAttribute(TextAttributeConstants.NUMERIC_SHAPING);
+
+        if (runDirection == null) {
+            paraLvl = LEVEL_DEFAULT_LTR;
+        } else {
+            paraLvl = (runDirection.equals(TextAttributeConstants.RUN_DIRECTION_LTR)) ?
+                        LTR : RTL;
+        }
+
+        byte[] lvls = null;
+        int len = paragraph.getEndIndex() - paragraph.getBeginIndex();
+        byte[] embeddingLevels = new byte[len];
+        char[] txt = new char[len];
+        int i = 0;
+        while (ch != AttributedCharacterIterator.DONE) {
+            txt[i] = ch;
+            Integer embedding =
+                (Integer) paragraph.getAttribute(TextAttributeConstants.BIDI_EMBEDDING);
+            if (embedding != null) {
+                byte level = embedding.byteValue();
+                if (level == 0) {
+                    /* no-op */
+                } else if (level < 0) {
+                    lvls = embeddingLevels;
+                    embeddingLevels[i] = (byte)((0 - level) | LEVEL_OVERRIDE);
+                } else {
+                    lvls = embeddingLevels;
+                    embeddingLevels[i] = level;
+                }
+            }
+            ch = paragraph.next();
+            ++i;
+        }
+
+        if (shaper != null) {
+            NumericShapings.shape(shaper, txt, 0, len);
+        }
+        setPara(txt, paraLvl, lvls);
+    }
+
+    /**
+     * Specify whether block separators must be allocated level zero,
+     * so that successive paragraphs will progress from left to right.
+     * This method must be called before <code>setPara()</code>.
+     * Paragraph separators (B) may appear in the text.  Setting them to level zero
+     * means that all paragraph separators (including one possibly appearing
+     * in the last text position) are kept in the reordered text after the text
+     * that they follow in the source text.
+     * When this feature is not enabled, a paragraph separator at the last
+     * position of the text before reordering will go to the first position
+     * of the reordered text when the paragraph level is odd.
+     *
+     * @param ordarParaLTR specifies whether paragraph separators (B) must
+     * receive level 0, so that successive paragraphs progress from left to right.
+     *
+     * @see #setPara
+     * @stable ICU 3.8
+     */
+    public void orderParagraphsLTR(boolean ordarParaLTR) {
+        orderParagraphsLTR = ordarParaLTR;
+    }
+
+    /**
+     * Get the directionality of the text.
+     *
+     * @return a value of <code>LTR</code>, <code>RTL</code> or <code>MIXED</code>
+     *         that indicates if the entire text
+     *         represented by this object is unidirectional,
+     *         and which direction, or if it is mixed-directional.
+     *
+     * @throws IllegalStateException if this call is not preceded by a successful
+     *         call to <code>setPara</code> or <code>setLine</code>
+     *
+     * @see #LTR
+     * @see #RTL
+     * @see #MIXED
+     * @stable ICU 3.8
+     */
+    public byte getDirection()
+    {
+        verifyValidParaOrLine();
+        return direction;
+    }
+
+    /**
+     * Get the length of the text.
+     *
+     * @return The length of the text that the <code>Bidi</code> object was
+     *         created for.
+     *
+     * @throws IllegalStateException if this call is not preceded by a successful
+     *         call to <code>setPara</code> or <code>setLine</code>
+     * @stable ICU 3.8
+     */
+    public int getLength()
+    {
+        verifyValidParaOrLine();
+        return originalLength;
+    }
+
+    /* paragraphs API methods ------------------------------------------------- */
+
+    /**
+     * Get the paragraph level of the text.
+     *
+     * @return The paragraph level. If there are multiple paragraphs, their
+     *         level may vary if the required paraLevel is LEVEL_DEFAULT_LTR or
+     *         LEVEL_DEFAULT_RTL.  In that case, the level of the first paragraph
+     *         is returned.
+     *
+     * @throws IllegalStateException if this call is not preceded by a successful
+     *         call to <code>setPara</code> or <code>setLine</code>
+     *
+     * @see #LEVEL_DEFAULT_LTR
+     * @see #LEVEL_DEFAULT_RTL
+     * @see #getParagraph
+     * @see #getParagraphByIndex
+     * @stable ICU 3.8
+     */
+    public byte getParaLevel()
+    {
+        verifyValidParaOrLine();
+        return paraLevel;
+    }
+
+    /**
+     * Retrieves the Bidi class for a given code point.
+     * <p>If a <code>BidiClassifier</code> is defined and returns a value
+     * other than <code>CLASS_DEFAULT</code>, that value is used; otherwise
+     * the default class determination mechanism is invoked.</p>
+     *
+     * @param c The code point to get a Bidi class for.
+     *
+     * @return The Bidi class for the character <code>c</code> that is in effect
+     *         for this <code>Bidi</code> instance.
+     *
+     * @stable ICU 3.8
+     */
+    public int getCustomizedClass(int c) {
+        int dir;
+
+        dir = bdp.getClass(c);
+        if (dir >= CHAR_DIRECTION_COUNT)
+            dir = ON;
+        return dir;
+    }
+
+    /**
+     * <code>setLine()</code> returns a <code>Bidi</code> object to
+     * contain the reordering information, especially the resolved levels,
+     * for all the characters in a line of text. This line of text is
+     * specified by referring to a <code>Bidi</code> object representing
+     * this information for a piece of text containing one or more paragraphs,
+     * and by specifying a range of indexes in this text.<p>
+     * In the new line object, the indexes will range from 0 to <code>limit-start-1</code>.<p>
+     *
+     * This is used after calling <code>setPara()</code>
+     * for a piece of text, and after line-breaking on that text.
+     * It is not necessary if each paragraph is treated as a single line.<p>
+     *
+     * After line-breaking, rules (L1) and (L2) for the treatment of
+     * trailing WS and for reordering are performed on
+     * a <code>Bidi</code> object that represents a line.<p>
+     *
+     * <strong>Important: </strong>the line <code>Bidi</code> object may
+     * reference data within the global text <code>Bidi</code> object.
+     * You should not alter the content of the global text object until
+     * you are finished using the line object.
+     *
+     * @param start is the line's first index into the text.
+     *
+     * @param limit is just behind the line's last index into the text
+     *        (its last index +1).
+     *
+     * @return a <code>Bidi</code> object that will now represent a line of the text.
+     *
+     * @throws IllegalStateException if this call is not preceded by a successful
+     *         call to <code>setPara</code>
+     * @throws IllegalArgumentException if start and limit are not in the range
+     *         <code>0&lt;=start&lt;limit&lt;=getProcessedLength()</code>,
+     *         or if the specified line crosses a paragraph boundary
+     *
+     * @see #setPara
+     * @see #getProcessedLength
+     * @stable ICU 3.8
+     */
+    public Bidi setLine(Bidi bidi, BidiBase bidiBase, Bidi newBidi, BidiBase newBidiBase, int start, int limit)
+    {
+        verifyValidPara();
+        verifyRange(start, 0, limit);
+        verifyRange(limit, 0, length+1);
+
+        return BidiLine.setLine(this, newBidi, newBidiBase, start, limit);
+    }
+
+    /**
+     * Get the level for one character.
+     *
+     * @param charIndex the index of a character.
+     *
+     * @return The level for the character at <code>charIndex</code>.
+     *
+     * @throws IllegalStateException if this call is not preceded by a successful
+     *         call to <code>setPara</code> or <code>setLine</code>
+     * @throws IllegalArgumentException if charIndex is not in the range
+     *         <code>0&lt;=charIndex&lt;getProcessedLength()</code>
+     *
+     * @see #getProcessedLength
+     * @stable ICU 3.8
+     */
+    public byte getLevelAt(int charIndex)
+    {
+        // for backward compatibility
+        if (charIndex < 0 || charIndex >= length) {
+            return (byte)getBaseLevel();
+        }
+
+        verifyValidParaOrLine();
+        verifyRange(charIndex, 0, length);
+        return BidiLine.getLevelAt(this, charIndex);
+    }
+
+    /**
+     * Get an array of levels for each character.<p>
+     *
+     * Note that this method may allocate memory under some
+     * circumstances, unlike <code>getLevelAt()</code>.
+     *
+     * @return The levels array for the text,
+     *         or <code>null</code> if an error occurs.
+     *
+     * @throws IllegalStateException if this call is not preceded by a successful
+     *         call to <code>setPara</code> or <code>setLine</code>
+     * @stable ICU 3.8
+     */
+    byte[] getLevels()
+    {
+        verifyValidParaOrLine();
+        if (length <= 0) {
+            return new byte[0];
+        }
+        return BidiLine.getLevels(this);
+    }
+
+    /**
+     * Get the number of runs.
+     * This method may invoke the actual reordering on the
+     * <code>Bidi</code> object, after <code>setPara()</code>
+     * may have resolved only the levels of the text. Therefore,
+     * <code>countRuns()</code> may have to allocate memory,
+     * and may throw an exception if it fails to do so.
+     *
+     * @return The number of runs.
+     *
+     * @throws IllegalStateException if this call is not preceded by a successful
+     *         call to <code>setPara</code> or <code>setLine</code>
+     * @stable ICU 3.8
+     */
+    public int countRuns()
+    {
+        verifyValidParaOrLine();
+        BidiLine.getRuns(this);
+        return runCount;
+    }
+
+    /**
+     *
+     * Get a <code>BidiRun</code> object according to its index. BidiRun methods
+     * may be used to retrieve the run's logical start, length and level,
+     * which can be even for an LTR run or odd for an RTL run.
+     * In an RTL run, the character at the logical start is
+     * visually on the right of the displayed run.
+     * The length is the number of characters in the run.<p>
+     * <code>countRuns()</code> is normally called
+     * before the runs are retrieved.
+     *
+     * <p>
+     *  Example:
+     * <pre>
+     *  Bidi bidi = new Bidi();
+     *  String text = "abc 123 DEFG xyz";
+     *  bidi.setPara(text, Bidi.RTL, null);
+     *  int i, count=bidi.countRuns(), logicalStart, visualIndex=0, length;
+     *  BidiRun run;
+     *  for (i = 0; i &lt; count; ++i) {
+     *      run = bidi.getVisualRun(i);
+     *      logicalStart = run.getStart();
+     *      length = run.getLength();
+     *      if (Bidi.LTR == run.getEmbeddingLevel()) {
+     *          do { // LTR
+     *              show_char(text.charAt(logicalStart++), visualIndex++);
+     *          } while (--length &gt; 0);
+     *      } else {
+     *          logicalStart += length;  // logicalLimit
+     *          do { // RTL
+     *              show_char(text.charAt(--logicalStart), visualIndex++);
+     *          } while (--length &gt; 0);
+     *      }
+     *  }
+     * </pre>
+     * <p>
+     * Note that in right-to-left runs, code like this places
+     * second surrogates before first ones (which is generally a bad idea)
+     * and combining characters before base characters.
+     * <p>
+     * Use of <code>{@link #writeReordered}</code>, optionally with the
+     * <code>{@link #KEEP_BASE_COMBINING}</code> option, can be considered in
+     * order to avoid these issues.
+     *
+     * @param runIndex is the number of the run in visual order, in the
+     *        range <code>[0..countRuns()-1]</code>.
+     *
+     * @return a BidiRun object containing the details of the run. The
+     *         directionality of the run is
+     *         <code>LTR==0</code> or <code>RTL==1</code>,
+     *         never <code>MIXED</code>.
+     *
+     * @throws IllegalStateException if this call is not preceded by a successful
+     *         call to <code>setPara</code> or <code>setLine</code>
+     * @throws IllegalArgumentException if <code>runIndex</code> is not in
+     *         the range <code>0&lt;=runIndex&lt;countRuns()</code>
+     *
+     * @see #countRuns()
+     * @see com.ibm.icu.text.BidiRun
+     * @see com.ibm.icu.text.BidiRun#getStart()
+     * @see com.ibm.icu.text.BidiRun#getLength()
+     * @see com.ibm.icu.text.BidiRun#getEmbeddingLevel()
+     * @stable ICU 3.8
+     */
+    BidiRun getVisualRun(int runIndex)
+    {
+        verifyValidParaOrLine();
+        BidiLine.getRuns(this);
+        verifyRange(runIndex, 0, runCount);
+        return BidiLine.getVisualRun(this, runIndex);
+    }
+
+    /**
+     * Get a visual-to-logical index map (array) for the characters in the
+     * <code>Bidi</code> (paragraph or line) object.
+     * <p>
+     * Some values in the map may be <code>MAP_NOWHERE</code> if the
+     * corresponding text characters are Bidi marks inserted in the visual
+     * output by the option <code>OPTION_INSERT_MARKS</code>.
+     * <p>
+     * When the visual output is altered by using options of
+     * <code>writeReordered()</code> such as <code>INSERT_LRM_FOR_NUMERIC</code>,
+     * <code>KEEP_BASE_COMBINING</code>, <code>OUTPUT_REVERSE</code>,
+     * <code>REMOVE_BIDI_CONTROLS</code>, the logical positions returned may not
+     * be correct. It is advised to use, when possible, reordering options
+     * such as {@link #OPTION_INSERT_MARKS} and {@link #OPTION_REMOVE_CONTROLS}.
+     *
+     * @return an array of <code>getResultLength()</code>
+     *        indexes which will reflect the reordering of the characters.<br><br>
+     *        The index map will result in
+     *        <code>indexMap[visualIndex]==logicalIndex</code>, where
+     *        <code>indexMap</code> represents the returned array.
+     *
+     * @throws IllegalStateException if this call is not preceded by a successful
+     *         call to <code>setPara</code> or <code>setLine</code>
+     *
+     * @see #getLogicalMap
+     * @see #getLogicalIndex
+     * @see #getResultLength
+     * @see #MAP_NOWHERE
+     * @see #OPTION_INSERT_MARKS
+     * @see #writeReordered
+     * @stable ICU 3.8
+     */
+    private int[] getVisualMap()
+    {
+        /* countRuns() checks successful call to setPara/setLine */
+        countRuns();
+        if (resultLength <= 0) {
+            return new int[0];
+        }
+        return BidiLine.getVisualMap(this);
+    }
+
+    /**
+     * This is a convenience method that does not use a <code>Bidi</code> object.
+     * It is intended to be used for when an application has determined the levels
+     * of objects (character sequences) and just needs to have them reordered (L2).
+     * This is equivalent to using <code>getVisualMap()</code> on a
+     * <code>Bidi</code> object.
+     *
+     * @param levels is an array of levels that have been determined by
+     *        the application.
+     *
+     * @return an array of <code>levels.length</code>
+     *        indexes which will reflect the reordering of the characters.<p>
+     *        The index map will result in
+     *        <code>indexMap[visualIndex]==logicalIndex</code>, where
+     *        <code>indexMap</code> represents the returned array.
+     *
+     * @stable ICU 3.8
+     */
+    private static int[] reorderVisual(byte[] levels)
+    {
+        return BidiLine.reorderVisual(levels);
+    }
+
+    /**
+     * Constant indicating that the base direction depends on the first strong
+     * directional character in the text according to the Unicode Bidirectional
+     * Algorithm. If no strong directional character is present, the base
+     * direction is right-to-left.
+     * @stable ICU 3.8
+     */
+    public static final int DIRECTION_DEFAULT_RIGHT_TO_LEFT = LEVEL_DEFAULT_RTL;
+
+    /**
+     * Create Bidi from the given text, embedding, and direction information.
+     * The embeddings array may be null. If present, the values represent
+     * embedding level information. Negative values from -1 to -61 indicate
+     * overrides at the absolute value of the level. Positive values from 1 to
+     * 61 indicate embeddings. Where values are zero, the base embedding level
+     * as determined by the base direction is assumed.<p>
+     *
+     * Note: this constructor calls setPara() internally.
+     *
+     * @param text an array containing the paragraph of text to process.
+     * @param textStart the index into the text array of the start of the
+     *        paragraph.
+     * @param embeddings an array containing embedding values for each character
+     *        in the paragraph. This can be null, in which case it is assumed
+     *        that there is no external embedding information.
+     * @param embStart the index into the embedding array of the start of the
+     *        paragraph.
+     * @param paragraphLength the length of the paragraph in the text and
+     *        embeddings arrays.
+     * @param flags a collection of flags that control the algorithm. The
+     *        algorithm understands the flags DIRECTION_LEFT_TO_RIGHT,
+     *        DIRECTION_RIGHT_TO_LEFT, DIRECTION_DEFAULT_LEFT_TO_RIGHT, and
+     *        DIRECTION_DEFAULT_RIGHT_TO_LEFT. Other values are reserved.
+     *
+     * @throws IllegalArgumentException if the values in embeddings are
+     *         not within the allowed range
+     *
+     * @see #DIRECTION_LEFT_TO_RIGHT
+     * @see #DIRECTION_RIGHT_TO_LEFT
+     * @see #DIRECTION_DEFAULT_LEFT_TO_RIGHT
+     * @see #DIRECTION_DEFAULT_RIGHT_TO_LEFT
+     * @stable ICU 3.8
+     */
+    public BidiBase(char[] text,
+            int textStart,
+            byte[] embeddings,
+            int embStart,
+            int paragraphLength,
+            int flags)
+    {
+        this(0, 0);
+        byte paraLvl;
+        switch (flags) {
+        case Bidi.DIRECTION_LEFT_TO_RIGHT:
+        default:
+            paraLvl = LTR;
+            break;
+        case Bidi.DIRECTION_RIGHT_TO_LEFT:
+            paraLvl = RTL;
+            break;
+        case Bidi.DIRECTION_DEFAULT_LEFT_TO_RIGHT:
+            paraLvl = LEVEL_DEFAULT_LTR;
+            break;
+        case Bidi.DIRECTION_DEFAULT_RIGHT_TO_LEFT:
+            paraLvl = LEVEL_DEFAULT_RTL;
+            break;
+        }
+        byte[] paraEmbeddings;
+        if (embeddings == null) {
+            paraEmbeddings = null;
+        } else {
+            paraEmbeddings = new byte[paragraphLength];
+            byte lev;
+            for (int i = 0; i < paragraphLength; i++) {
+                lev = embeddings[i + embStart];
+                if (lev < 0) {
+                    lev = (byte)((- lev) | LEVEL_OVERRIDE);
+                } else if (lev == 0) {
+                    lev = paraLvl;
+                    if (paraLvl > MAX_EXPLICIT_LEVEL) {
+                        lev &= 1;
+                    }
+                }
+                paraEmbeddings[i] = lev;
+            }
+        }
+
+        char[] paraText = new char[paragraphLength];
+        System.arraycopy(text, textStart, paraText, 0, paragraphLength);
+        setPara(paraText, paraLvl, paraEmbeddings);
+    }
+
+    /**
+     * Return true if the line is not left-to-right or right-to-left. This means
+     * it either has mixed runs of left-to-right and right-to-left text, or the
+     * base direction differs from the direction of the only run of text.
+     *
+     * @return true if the line is not left-to-right or right-to-left.
+     *
+     * @throws IllegalStateException if this call is not preceded by a successful
+     *         call to <code>setPara</code>
+     * @stable ICU 3.8
+     */
+    public boolean isMixed()
+    {
+        return (!isLeftToRight() && !isRightToLeft());
+    }
+
+    /**
+     * Return true if the line is all left-to-right text and the base direction
+     * is left-to-right.
+     *
+     * @return true if the line is all left-to-right text and the base direction
+     *         is left-to-right.
+     *
+     * @throws IllegalStateException if this call is not preceded by a successful
+     *         call to <code>setPara</code>
+     * @stable ICU 3.8
+     */
+    public boolean isLeftToRight()
+    {
+        return (getDirection() == LTR && (paraLevel & 1) == 0);
+    }
+
+    /**
+     * Return true if the line is all right-to-left text, and the base direction
+     * is right-to-left
+     *
+     * @return true if the line is all right-to-left text, and the base
+     *         direction is right-to-left
+     *
+     * @throws IllegalStateException if this call is not preceded by a successful
+     *         call to <code>setPara</code>
+     * @stable ICU 3.8
+     */
+    public boolean isRightToLeft()
+    {
+        return (getDirection() == RTL && (paraLevel & 1) == 1);
+    }
+
+    /**
+     * Return true if the base direction is left-to-right
+     *
+     * @return true if the base direction is left-to-right
+     *
+     * @throws IllegalStateException if this call is not preceded by a successful
+     *         call to <code>setPara</code> or <code>setLine</code>
+     *
+     * @stable ICU 3.8
+     */
+    public boolean baseIsLeftToRight()
+    {
+        return (getParaLevel() == LTR);
+    }
+
+    /**
+     * Return the base level (0 if left-to-right, 1 if right-to-left).
+     *
+     * @return the base level
+     *
+     * @throws IllegalStateException if this call is not preceded by a successful
+     *         call to <code>setPara</code> or <code>setLine</code>
+     *
+     * @stable ICU 3.8
+     */
+    public int getBaseLevel()
+    {
+        return getParaLevel();
+    }
+
+    /**
+     * Compute the logical to visual run mapping
+     */
+     void getLogicalToVisualRunsMap()
+     {
+        if (isGoodLogicalToVisualRunsMap) {
+            return;
+        }
+        int count = countRuns();
+        if ((logicalToVisualRunsMap == null) ||
+            (logicalToVisualRunsMap.length < count)) {
+            logicalToVisualRunsMap = new int[count];
+        }
+        int i;
+        long[] keys = new long[count];
+        for (i = 0; i < count; i++) {
+            keys[i] = ((long)(runs[i].start)<<32) + i;
+        }
+        Arrays.sort(keys);
+        for (i = 0; i < count; i++) {
+            logicalToVisualRunsMap[i] = (int)(keys[i] & 0x00000000FFFFFFFF);
+        }
+        isGoodLogicalToVisualRunsMap = true;
+     }
+
+    /**
+     * Return the level of the nth logical run in this line.
+     *
+     * @param run the index of the run, between 0 and <code>countRuns()-1</code>
+     *
+     * @return the level of the run
+     *
+     * @throws IllegalStateException if this call is not preceded by a successful
+     *         call to <code>setPara</code> or <code>setLine</code>
+     * @throws IllegalArgumentException if <code>run</code> is not in
+     *         the range <code>0&lt;=run&lt;countRuns()</code>
+     * @stable ICU 3.8
+     */
+    public int getRunLevel(int run)
+    {
+        verifyValidParaOrLine();
+        BidiLine.getRuns(this);
+
+        // for backward compatibility
+        if (run < 0 || run >= runCount) {
+            return getParaLevel();
+        }
+
+        getLogicalToVisualRunsMap();
+        return runs[logicalToVisualRunsMap[run]].level;
+    }
+
+    /**
+     * Return the index of the character at the start of the nth logical run in
+     * this line, as an offset from the start of the line.
+     *
+     * @param run the index of the run, between 0 and <code>countRuns()</code>
+     *
+     * @return the start of the run
+     *
+     * @throws IllegalStateException if this call is not preceded by a successful
+     *         call to <code>setPara</code> or <code>setLine</code>
+     * @throws IllegalArgumentException if <code>run</code> is not in
+     *         the range <code>0&lt;=run&lt;countRuns()</code>
+     * @stable ICU 3.8
+     */
+    public int getRunStart(int run)
+    {
+        verifyValidParaOrLine();
+        BidiLine.getRuns(this);
+
+        // for backward compatibility
+        if (runCount == 1) {
+            return 0;
+        } else if (run == runCount) {
+            return length;
+        }
+
+        getLogicalToVisualRunsMap();
+        return runs[logicalToVisualRunsMap[run]].start;
+    }
+
+    /**
+     * Return the index of the character past the end of the nth logical run in
+     * this line, as an offset from the start of the line. For example, this
+     * will return the length of the line for the last run on the line.
+     *
+     * @param run the index of the run, between 0 and <code>countRuns()</code>
+     *
+     * @return the limit of the run
+     *
+     * @throws IllegalStateException if this call is not preceded by a successful
+     *         call to <code>setPara</code> or <code>setLine</code>
+     * @throws IllegalArgumentException if <code>run</code> is not in
+     *         the range <code>0&lt;=run&lt;countRuns()</code>
+     * @stable ICU 3.8
+     */
+    public int getRunLimit(int run)
+    {
+        verifyValidParaOrLine();
+        BidiLine.getRuns(this);
+
+        // for backward compatibility
+        if (runCount == 1) {
+            return length;
+        }
+
+        getLogicalToVisualRunsMap();
+        int idx = logicalToVisualRunsMap[run];
+        int len = idx == 0 ? runs[idx].limit :
+                                runs[idx].limit - runs[idx-1].limit;
+        return runs[idx].start + len;
+    }
+
+    /**
+     * Return true if the specified text requires bidi analysis. If this returns
+     * false, the text will display left-to-right. Clients can then avoid
+     * constructing a Bidi object. Text in the Arabic Presentation Forms area of
+     * Unicode is presumed to already be shaped and ordered for display, and so
+     * will not cause this method to return true.
+     *
+     * @param text the text containing the characters to test
+     * @param start the start of the range of characters to test
+     * @param limit the limit of the range of characters to test
+     *
+     * @return true if the range of characters requires bidi analysis
+     *
+     * @stable ICU 3.8
+     */
+    public static boolean requiresBidi(char[] text,
+            int start,
+            int limit)
+    {
+        final int RTLMask = (1 << R |
+                1 << AL |
+                1 << RLE |
+                1 << RLO |
+                1 << AN);
+
+        if (0 > start || start > limit || limit > text.length) {
+            throw new IllegalArgumentException("Value start " + start +
+                      " is out of range 0 to " + limit + ", or limit " + limit +
+                      " is beyond the text length " + text.length);
+        }
+
+        for (int i = start; i < limit; ++i) {
+            if (Character.isHighSurrogate(text[i]) && i < (limit-1) &&
+                Character.isLowSurrogate(text[i+1])) {
+                if (((1 << UCharacter.getDirection(Character.codePointAt(text, i))) & RTLMask) != 0) {
+                    return true;
+                }
+            } else if (((1 << UCharacter.getDirection(text[i])) & RTLMask) != 0) {
+                return true;
+            }
+        }
+
+        return false;
+    }
+
+    /**
+     * Reorder the objects in the array into visual order based on their levels.
+     * This is a utility method to use when you have a collection of objects
+     * representing runs of text in logical order, each run containing text at a
+     * single level. The elements at <code>index</code> from
+     * <code>objectStart</code> up to <code>objectStart + count</code> in the
+     * objects array will be reordered into visual order assuming
+     * each run of text has the level indicated by the corresponding element in
+     * the levels array (at <code>index - objectStart + levelStart</code>).
+     *
+     * @param levels an array representing the bidi level of each object
+     * @param levelStart the start position in the levels array
+     * @param objects the array of objects to be reordered into visual order
+     * @param objectStart the start position in the objects array
+     * @param count the number of objects to reorder
+     * @stable ICU 3.8
+     */
+    public static void reorderVisually(byte[] levels,
+            int levelStart,
+            Object[] objects,
+            int objectStart,
+            int count)
+    {
+        // for backward compatibility
+        if (0 > levelStart || levels.length <= levelStart) {
+          throw new IllegalArgumentException("Value levelStart " +
+                      levelStart + " is out of range 0 to " +
+                      (levels.length-1));
+        }
+        if (0 > objectStart || objects.length <= objectStart) {
+            throw new IllegalArgumentException("Value objectStart " +
+                      objectStart + " is out of range 0 to " +
+                      (objects.length-1));
+        }
+        if (0 > count || objects.length - count < objectStart) {
+            throw new IllegalArgumentException("Value count " +
+                      count + " is less than zero, or objectStart + count" +
+                      " is beyond objects length " + objects.length);
+        }
+
+        byte[] reorderLevels = new byte[count];
+        System.arraycopy(levels, levelStart, reorderLevels, 0, count);
+        int[] indexMap = reorderVisual(reorderLevels);
+        Object[] temp = new Object[count];
+        System.arraycopy(objects, objectStart, temp, 0, count);
+        for (int i = 0; i < count; ++i) {
+            objects[objectStart + i] = temp[indexMap[i]];
+        }
+    }
+
+    /**
+     * Take a <code>Bidi</code> object containing the reordering
+     * information for a piece of text (one or more paragraphs) set by
+     * <code>setPara()</code> or for a line of text set by <code>setLine()</code>
+     * and return a string containing the reordered text.
+     *
+     * <p>The text may have been aliased (only a reference was stored
+     * without copying the contents), thus it must not have been modified
+     * since the <code>setPara()</code> call.</p>
+     *
+     * This method preserves the integrity of characters with multiple
+     * code units and (optionally) combining characters.
+     * Characters in RTL runs can be replaced by mirror-image characters
+     * in the returned string. Note that "real" mirroring has to be done in a
+     * rendering engine by glyph selection and that for many "mirrored"
+     * characters there are no Unicode characters as mirror-image equivalents.
+     * There are also options to insert or remove Bidi control
+     * characters; see the descriptions of the return value and the
+     * <code>options</code> parameter, and of the option bit flags.
+     *
+     * @param options A bit set of options for the reordering that control
+     *                how the reordered text is written.
+     *                The options include mirroring the characters on a code
+     *                point basis and inserting LRM characters, which is used
+     *                especially for transforming visually stored text
+     *                to logically stored text (although this is still an
+     *                imperfect implementation of an "inverse Bidi" algorithm
+     *                because it uses the "forward Bidi" algorithm at its core).
+     *                The available options are:
+     *                <code>DO_MIRRORING</code>,
+     *                <code>INSERT_LRM_FOR_NUMERIC</code>,
+     *                <code>KEEP_BASE_COMBINING</code>,
+     *                <code>OUTPUT_REVERSE</code>,
+     *                <code>REMOVE_BIDI_CONTROLS</code>,
+     *                <code>STREAMING</code>
+     *
+     * @return The reordered text.
+     *         If the <code>INSERT_LRM_FOR_NUMERIC</code> option is set, then
+     *         the length of the returned string could be as large as
+     *         <code>getLength()+2*countRuns()</code>.<br>
+     *         If the <code>REMOVE_BIDI_CONTROLS</code> option is set, then the
+     *         length of the returned string may be less than
+     *         <code>getLength()</code>.<br>
+     *         If none of these options is set, then the length of the returned
+     *         string will be exactly <code>getProcessedLength()</code>.
+     *
+     * @throws IllegalStateException if this call is not preceded by a successful
+     *         call to <code>setPara</code> or <code>setLine</code>
+     *
+     * @see #DO_MIRRORING
+     * @see #INSERT_LRM_FOR_NUMERIC
+     * @see #KEEP_BASE_COMBINING
+     * @see #OUTPUT_REVERSE
+     * @see #REMOVE_BIDI_CONTROLS
+     * @see #OPTION_STREAMING
+     * @see #getProcessedLength
+     * @stable ICU 3.8
+     */
+    public String writeReordered(int options)
+    {
+        verifyValidParaOrLine();
+        if (length == 0) {
+            /* nothing to do */
+            return "";
+        }
+        return BidiWriter.writeReordered(this, options);
+    }
+
+    /**
+     * Display the bidi internal state, used in debugging.
+     */
+    public String toString() {
+        StringBuilder buf = new StringBuilder(getClass().getName());
+
+        buf.append("[dir: ");
+        buf.append(direction);
+        buf.append(" baselevel: ");
+        buf.append(paraLevel);
+        buf.append(" length: ");
+        buf.append(length);
+        buf.append(" runs: ");
+        if (levels == null) {
+            buf.append("none");
+        } else {
+            buf.append('[');
+            buf.append(levels[0]);
+            for (int i = 1; i < levels.length; i++) {
+                buf.append(' ');
+                buf.append(levels[i]);
+            }
+            buf.append(']');
+        }
+        buf.append(" text: [0x");
+        buf.append(Integer.toHexString(text[0]));
+        for (int i = 1; i < text.length; i++) {
+            buf.append(" 0x");
+            buf.append(Integer.toHexString(text[i]));
+        }
+        buf.append("]]");
+
+        return buf.toString();
+    }
+
+    /**
+     * A class that provides access to constants defined by
+     * java.awt.font.TextAttribute without creating a static dependency.
+     */
+    private static class TextAttributeConstants {
+        // Make sure to load the AWT's TextAttribute class before using the constants, if any.
+        static {
+            try {
+                Class.forName("java.awt.font.TextAttribute", true, null);
+            } catch (ClassNotFoundException e) {}
+        }
+        static final JavaAWTFontAccess jafa = SharedSecrets.getJavaAWTFontAccess();
+
+        /**
+         * TextAttribute instances (or a fake Attribute type if
+         * java.awt.font.TextAttribute is not present)
+         */
+        static final AttributedCharacterIterator.Attribute RUN_DIRECTION =
+            getTextAttribute("RUN_DIRECTION");
+        static final AttributedCharacterIterator.Attribute NUMERIC_SHAPING =
+            getTextAttribute("NUMERIC_SHAPING");
+        static final AttributedCharacterIterator.Attribute BIDI_EMBEDDING =
+            getTextAttribute("BIDI_EMBEDDING");
+
+        /**
+         * TextAttribute.RUN_DIRECTION_LTR
+         */
+        static final Boolean RUN_DIRECTION_LTR = (jafa == null) ?
+            Boolean.FALSE : (Boolean)jafa.getTextAttributeConstant("RUN_DIRECTION_LTR");
+
+        @SuppressWarnings("serial")
+        private static AttributedCharacterIterator.Attribute
+            getTextAttribute(String name)
+        {
+            if (jafa == null) {
+                // fake attribute
+                return new AttributedCharacterIterator.Attribute(name) { };
+            } else {
+                return (AttributedCharacterIterator.Attribute)jafa.getTextAttributeConstant(name);
+            }
+        }
+    }
+
+    /**
+     * A class that provides access to java.awt.font.NumericShaper without
+     * creating a static dependency.
+     */
+    private static class NumericShapings {
+        // Make sure to load the AWT's NumericShaper class before calling shape, if any.
+        static {
+            try {
+                Class.forName("java.awt.font.NumericShaper", true, null);
+            } catch (ClassNotFoundException e) {}
+        }
+        static final JavaAWTFontAccess jafa = SharedSecrets.getJavaAWTFontAccess();
+
+        /**
+         * Invokes NumericShaping shape(text,start,count) method.
+         */
+        static void shape(Object shaper, char[] text, int start, int count) {
+            if (jafa != null) {
+                jafa.shape(shaper, text, start, count);
+            }
+        }
+    }
+
+}
diff --git a/tests/test_data/std/jdk/internal/icu/text/BidiLine.class b/tests/test_data/std/jdk/internal/icu/text/BidiLine.class
new file mode 100644
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HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/icu/text/BidiLine.java b/tests/test_data/std/jdk/internal/icu/text/BidiLine.java
new file mode 100644
index 00000000..54c7e9de
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/icu/text/BidiLine.java
@@ -0,0 +1,836 @@
+/*
+ * Copyright (c) 2009, 2022, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/*
+*******************************************************************************
+*   Copyright (C) 2001-2014, International Business Machines
+*   Corporation and others.  All Rights Reserved.
+*******************************************************************************
+*/
+/* Written by Simon Montagu, Matitiahu Allouche
+ * (ported from C code written by Markus W. Scherer)
+ */
+
+package jdk.internal.icu.text;
+
+import java.text.Bidi;
+import java.util.Arrays;
+
+final class BidiLine {
+
+    /*
+     * General remarks about the functions in this file:
+     *
+     * These functions deal with the aspects of potentially mixed-directional
+     * text in a single paragraph or in a line of a single paragraph
+     * which has already been processed according to
+     * the Unicode 3.0 Bidi algorithm as defined in
+     * <a href="https://www.unicode.org/reports/tr9/">Unicode Standard Annex #9:
+     * Unicode Bidirectional Algorithm</a>, version 13,
+     * also described in The Unicode Standard, Version 4.0.1 .
+     *
+     * This means that there is a Bidi object with a levels
+     * and a dirProps array.
+     * paraLevel and direction are also set.
+     * Only if the length of the text is zero, then levels==dirProps==NULL.
+     *
+     * The overall directionality of the paragraph
+     * or line is used to bypass the reordering steps if possible.
+     * Even purely RTL text does not need reordering there because
+     * the getLogical/VisualIndex() methods can compute the
+     * index on the fly in such a case.
+     *
+     * The implementation of the access to same-level-runs and of the reordering
+     * do attempt to provide better performance and less memory usage compared to
+     * a direct implementation of especially rule (L2) with an array of
+     * one (32-bit) integer per text character.
+     *
+     * Here, the levels array is scanned as soon as necessary, and a vector of
+     * same-level-runs is created. Reordering then is done on this vector.
+     * For each run of text positions that were resolved to the same level,
+     * only 8 bytes are stored: the first text position of the run and the visual
+     * position behind the run after reordering.
+     * One sign bit is used to hold the directionality of the run.
+     * This is inefficient if there are many very short runs. If the average run
+     * length is <2, then this uses more memory.
+     *
+     * In a further attempt to save memory, the levels array is never changed
+     * after all the resolution rules (Xn, Wn, Nn, In).
+     * Many methods have to consider the field trailingWSStart:
+     * if it is less than length, then there is an implicit trailing run
+     * at the paraLevel,
+     * which is not reflected in the levels array.
+     * This allows a line Bidi object to use the same levels array as
+     * its paragraph parent object.
+     *
+     * When a Bidi object is created for a line of a paragraph, then the
+     * paragraph's levels and dirProps arrays are reused by way of setting
+     * a pointer into them, not by copying. This again saves memory and forbids to
+     * change the now shared levels for (L1).
+     */
+
+    /* handle trailing WS (L1) -------------------------------------------------- */
+
+    /*
+     * setTrailingWSStart() sets the start index for a trailing
+     * run of WS in the line. This is necessary because we do not modify
+     * the paragraph's levels array that we just point into.
+     * Using trailingWSStart is another form of performing (L1).
+     *
+     * To make subsequent operations easier, we also include the run
+     * before the WS if it is at the paraLevel - we merge the two here.
+     *
+     * This method is called only from setLine(), so paraLevel is
+     * set correctly for the line even when contextual multiple paragraphs.
+     */
+
+    static void setTrailingWSStart(BidiBase bidiBase)
+    {
+        byte[] dirProps = bidiBase.dirProps;
+        byte[] levels = bidiBase.levels;
+        int start = bidiBase.length;
+        byte paraLevel = bidiBase.paraLevel;
+
+        /* If the line is terminated by a block separator, all preceding WS etc...
+           are already set to paragraph level.
+           Setting trailingWSStart to pBidi->length will avoid changing the
+           level of B chars from 0 to paraLevel in getLevels when
+           orderParagraphsLTR==true
+        */
+        if (dirProps[start - 1] == BidiBase.B) {
+            bidiBase.trailingWSStart = start;   /* currently == bidiBase.length */
+            return;
+        }
+        /* go backwards across all WS, BN, explicit codes */
+        while (start > 0 &&
+                (BidiBase.DirPropFlag(dirProps[start - 1]) & BidiBase.MASK_WS) != 0) {
+            --start;
+        }
+
+        /* if the WS run can be merged with the previous run then do so here */
+        while (start > 0 && levels[start - 1] == paraLevel) {
+            --start;
+        }
+
+        bidiBase.trailingWSStart=start;
+    }
+
+    static Bidi setLine(BidiBase paraBidi,
+                              Bidi newBidi, BidiBase lineBidi,
+                              int start, int limit) {
+        int length;
+
+        /* set the values in lineBidi from its paraBidi parent */
+        /* class members are already initialized to 0 */
+        // lineBidi.paraBidi = null;        /* mark unfinished setLine */
+        // lineBidi.flags = 0;
+        // lineBidi.controlCount = 0;
+
+        length = lineBidi.length = lineBidi.originalLength =
+                lineBidi.resultLength = limit - start;
+
+        lineBidi.text = new char[length];
+        System.arraycopy(paraBidi.text, start, lineBidi.text, 0, length);
+        lineBidi.paraLevel = paraBidi.GetParaLevelAt(start);
+        lineBidi.paraCount = paraBidi.paraCount;
+        lineBidi.runs = new BidiRun[0];
+        lineBidi.reorderingMode = paraBidi.reorderingMode;
+        lineBidi.reorderingOptions = paraBidi.reorderingOptions;
+        if (paraBidi.controlCount > 0) {
+            int j;
+            for (j = start; j < limit; j++) {
+                if (BidiBase.IsBidiControlChar(paraBidi.text[j])) {
+                    lineBidi.controlCount++;
+                }
+            }
+            lineBidi.resultLength -= lineBidi.controlCount;
+        }
+        /* copy proper subset of DirProps */
+        lineBidi.getDirPropsMemory(length);
+        lineBidi.dirProps = lineBidi.dirPropsMemory;
+        System.arraycopy(paraBidi.dirProps, start, lineBidi.dirProps, 0,
+                         length);
+        /* copy proper subset of Levels */
+        lineBidi.getLevelsMemory(length);
+        lineBidi.levels = lineBidi.levelsMemory;
+        System.arraycopy(paraBidi.levels, start, lineBidi.levels, 0,
+                         length);
+        lineBidi.runCount = -1;
+
+        if (paraBidi.direction != BidiBase.MIXED) {
+            /* the parent is already trivial */
+            lineBidi.direction = paraBidi.direction;
+
+            /*
+             * The parent's levels are all either
+             * implicitly or explicitly ==paraLevel;
+             * do the same here.
+             */
+            if (paraBidi.trailingWSStart <= start) {
+                lineBidi.trailingWSStart = 0;
+            } else if (paraBidi.trailingWSStart < limit) {
+                lineBidi.trailingWSStart = paraBidi.trailingWSStart - start;
+            } else {
+                lineBidi.trailingWSStart = length;
+            }
+        } else {
+            byte[] levels = lineBidi.levels;
+            int i, trailingWSStart;
+            byte level;
+
+            setTrailingWSStart(lineBidi);
+            trailingWSStart = lineBidi.trailingWSStart;
+
+            /* recalculate lineBidiBase.direction */
+            if (trailingWSStart == 0) {
+                /* all levels are at paraLevel */
+                lineBidi.direction = (byte)(lineBidi.paraLevel & 1);
+            } else {
+                /* get the level of the first character */
+                level = (byte)(levels[0] & 1);
+
+                /* if there is anything of a different level, then the line
+                   is mixed */
+                if (trailingWSStart < length &&
+                    (lineBidi.paraLevel & 1) != level) {
+                    /* the trailing WS is at paraLevel, which differs from
+                       levels[0] */
+                    lineBidi.direction = BidiBase.MIXED;
+                } else {
+                    /* see if levels[1..trailingWSStart-1] have the same
+                       direction as levels[0] and paraLevel */
+                    for (i = 1; ; i++) {
+                        if (i == trailingWSStart) {
+                            /* the direction values match those in level */
+                            lineBidi.direction = level;
+                            break;
+                        } else if ((levels[i] & 1) != level) {
+                            lineBidi.direction = BidiBase.MIXED;
+                            break;
+                        }
+                    }
+                }
+            }
+
+            switch(lineBidi.direction) {
+                case Bidi.DIRECTION_LEFT_TO_RIGHT:
+                    /* make sure paraLevel is even */
+                    lineBidi.paraLevel = (byte)
+                        ((lineBidi.paraLevel + 1) & ~1);
+
+                    /* all levels are implicitly at paraLevel (important for
+                       getLevels()) */
+                    lineBidi.trailingWSStart = 0;
+                    break;
+                case Bidi.DIRECTION_RIGHT_TO_LEFT:
+                    /* make sure paraLevel is odd */
+                    lineBidi.paraLevel |= 1;
+
+                    /* all levels are implicitly at paraLevel (important for
+                       getLevels()) */
+                    lineBidi.trailingWSStart = 0;
+                    break;
+                default:
+                    break;
+            }
+        }
+
+        lineBidi.paraBidi = paraBidi;     /* mark successful setLine */
+
+        return newBidi;
+    }
+
+    static byte getLevelAt(BidiBase bidiBase, int charIndex)
+    {
+        /* return paraLevel if in the trailing WS run, otherwise the real level */
+        if (bidiBase.direction != BidiBase.MIXED || charIndex >= bidiBase.trailingWSStart) {
+            return bidiBase.GetParaLevelAt(charIndex);
+        } else {
+            return bidiBase.levels[charIndex];
+        }
+    }
+
+    static byte[] getLevels(BidiBase bidiBase)
+    {
+        int start = bidiBase.trailingWSStart;
+        int length = bidiBase.length;
+
+        if (start != length) {
+            /* the current levels array does not reflect the WS run */
+            /*
+             * After the previous if(), we know that the levels array
+             * has an implicit trailing WS run and therefore does not fully
+             * reflect itself all the levels.
+             * This must be a Bidi object for a line, and
+             * we need to create a new levels array.
+             */
+            /* bidiBase.paraLevel is ok even if contextual multiple paragraphs,
+               since bidiBase is a line object                                     */
+            Arrays.fill(bidiBase.levels, start, length, bidiBase.paraLevel);
+
+            /* this new levels array is set for the line and reflects the WS run */
+            bidiBase.trailingWSStart = length;
+        }
+        if (length < bidiBase.levels.length) {
+            byte[] levels = new byte[length];
+            System.arraycopy(bidiBase.levels, 0, levels, 0, length);
+            return levels;
+        }
+        return bidiBase.levels;
+    }
+
+    static BidiRun getVisualRun(BidiBase bidiBase, int runIndex) {
+        int start = bidiBase.runs[runIndex].start;
+        int limit;
+        byte level = bidiBase.runs[runIndex].level;
+
+        if (runIndex > 0) {
+            limit = start +
+                    bidiBase.runs[runIndex].limit -
+                    bidiBase.runs[runIndex - 1].limit;
+        } else {
+            limit = start + bidiBase.runs[0].limit;
+        }
+        return new BidiRun(start, limit, level);
+    }
+
+    /* in trivial cases there is only one trivial run; called by getRuns() */
+    private static void getSingleRun(BidiBase bidiBase, byte level) {
+        /* simple, single-run case */
+        bidiBase.runs = bidiBase.simpleRuns;
+        bidiBase.runCount = 1;
+
+        /* fill and reorder the single run */
+        bidiBase.runs[0] = new BidiRun(0, bidiBase.length, level);
+    }
+
+    /* reorder the runs array (L2) ---------------------------------------------- */
+
+    /*
+     * Reorder the same-level runs in the runs array.
+     * Here, runCount>1 and maxLevel>=minLevel>=paraLevel.
+     * All the visualStart fields=logical start before reordering.
+     * The "odd" bits are not set yet.
+     *
+     * Reordering with this data structure lends itself to some handy shortcuts:
+     *
+     * Since each run is moved but not modified, and since at the initial maxLevel
+     * each sequence of same-level runs consists of only one run each, we
+     * don't need to do anything there and can predecrement maxLevel.
+     * In many simple cases, the reordering is thus done entirely in the
+     * index mapping.
+     * Also, reordering occurs only down to the lowest odd level that occurs,
+     * which is minLevel|1. However, if the lowest level itself is odd, then
+     * in the last reordering the sequence of the runs at this level or higher
+     * will be all runs, and we don't need the elaborate loop to search for them.
+     * This is covered by ++minLevel instead of minLevel|=1 followed
+     * by an extra reorder-all after the reorder-some loop.
+     * About a trailing WS run:
+     * Such a run would need special treatment because its level is not
+     * reflected in levels[] if this is not a paragraph object.
+     * Instead, all characters from trailingWSStart on are implicitly at
+     * paraLevel.
+     * However, for all maxLevel>paraLevel, this run will never be reordered
+     * and does not need to be taken into account. maxLevel==paraLevel is only reordered
+     * if minLevel==paraLevel is odd, which is done in the extra segment.
+     * This means that for the main reordering loop we don't need to consider
+     * this run and can --runCount. If it is later part of the all-runs
+     * reordering, then runCount is adjusted accordingly.
+     */
+    private static void reorderLine(BidiBase bidiBase, byte minLevel, byte maxLevel) {
+
+        /* nothing to do? */
+        if (maxLevel<=(minLevel|1)) {
+            return;
+        }
+
+        BidiRun[] runs;
+        BidiRun tempRun;
+        byte[] levels;
+        int firstRun, endRun, limitRun, runCount;
+
+        /*
+         * Reorder only down to the lowest odd level
+         * and reorder at an odd minLevel in a separate, simpler loop.
+         * See comments above for why minLevel is always incremented.
+         */
+        ++minLevel;
+
+        runs = bidiBase.runs;
+        levels = bidiBase.levels;
+        runCount = bidiBase.runCount;
+
+        /* do not include the WS run at paraLevel<=old minLevel except in the simple loop */
+        if (bidiBase.trailingWSStart < bidiBase.length) {
+            --runCount;
+        }
+
+        while (--maxLevel >= minLevel) {
+            firstRun = 0;
+
+            /* loop for all sequences of runs */
+            for ( ; ; ) {
+                /* look for a sequence of runs that are all at >=maxLevel */
+                /* look for the first run of such a sequence */
+                while (firstRun < runCount && levels[runs[firstRun].start] < maxLevel) {
+                    ++firstRun;
+                }
+                if (firstRun >= runCount) {
+                    break;  /* no more such runs */
+                }
+
+                /* look for the limit run of such a sequence (the run behind it) */
+                for (limitRun = firstRun; ++limitRun < runCount &&
+                      levels[runs[limitRun].start]>=maxLevel; ) {}
+
+                /* Swap the entire sequence of runs from firstRun to limitRun-1. */
+                endRun = limitRun - 1;
+                while (firstRun < endRun) {
+                    tempRun = runs[firstRun];
+                    runs[firstRun] = runs[endRun];
+                    runs[endRun] = tempRun;
+                    ++firstRun;
+                    --endRun;
+                }
+
+                if (limitRun == runCount) {
+                    break;  /* no more such runs */
+                } else {
+                    firstRun = limitRun + 1;
+                }
+            }
+        }
+
+        /* now do maxLevel==old minLevel (==odd!), see above */
+        if ((minLevel & 1) == 0) {
+            firstRun = 0;
+
+            /* include the trailing WS run in this complete reordering */
+            if (bidiBase.trailingWSStart == bidiBase.length) {
+                --runCount;
+            }
+
+            /* Swap the entire sequence of all runs. (endRun==runCount) */
+            while (firstRun < runCount) {
+                tempRun = runs[firstRun];
+                runs[firstRun] = runs[runCount];
+                runs[runCount] = tempRun;
+                ++firstRun;
+                --runCount;
+            }
+        }
+    }
+
+    /* compute the runs array --------------------------------------------------- */
+
+    static int getRunFromLogicalIndex(BidiBase bidiBase, int logicalIndex) {
+        BidiRun[] runs = bidiBase.runs;
+        int runCount = bidiBase.runCount, visualStart = 0, i, length, logicalStart;
+
+        for (i = 0; i < runCount; i++) {
+            length = runs[i].limit - visualStart;
+            logicalStart = runs[i].start;
+            if ((logicalIndex >= logicalStart) && (logicalIndex < (logicalStart+length))) {
+                return i;
+            }
+            visualStart += length;
+        }
+        /* we should never get here */
+        throw new IllegalStateException("Internal ICU error in getRunFromLogicalIndex");
+    }
+
+    /*
+     * Compute the runs array from the levels array.
+     * After getRuns() returns true, runCount is guaranteed to be >0
+     * and the runs are reordered.
+     * Odd-level runs have visualStart on their visual right edge and
+     * they progress visually to the left.
+     * If option OPTION_INSERT_MARKS is set, insertRemove will contain the
+     * sum of appropriate LRM/RLM_BEFORE/AFTER flags.
+     * If option OPTION_REMOVE_CONTROLS is set, insertRemove will contain the
+     * negative number of BiDi control characters within this run.
+     */
+    static void getRuns(BidiBase bidiBase) {
+        /*
+         * This method returns immediately if the runs are already set. This
+         * includes the case of length==0 (handled in setPara)..
+         */
+        if (bidiBase.runCount >= 0) {
+            return;
+        }
+        if (bidiBase.direction != BidiBase.MIXED) {
+            /* simple, single-run case - this covers length==0 */
+            /* bidiBase.paraLevel is ok even for contextual multiple paragraphs */
+            getSingleRun(bidiBase, bidiBase.paraLevel);
+        } else /* BidiBase.MIXED, length>0 */ {
+            /* mixed directionality */
+            int length = bidiBase.length, limit;
+            byte[] levels = bidiBase.levels;
+            int i, runCount;
+            byte level = -1;    /* initialize with no valid level */
+            /*
+             * If there are WS characters at the end of the line
+             * and the run preceding them has a level different from
+             * paraLevel, then they will form their own run at paraLevel (L1).
+             * Count them separately.
+             * We need some special treatment for this in order to not
+             * modify the levels array which a line Bidi object shares
+             * with its paragraph parent and its other line siblings.
+             * In other words, for the trailing WS, it may be
+             * levels[]!=paraLevel but we have to treat it like it were so.
+             */
+            limit = bidiBase.trailingWSStart;
+            /* count the runs, there is at least one non-WS run, and limit>0 */
+            runCount = 0;
+            for (i = 0; i < limit; ++i) {
+                /* increment runCount at the start of each run */
+                if (levels[i] != level) {
+                    ++runCount;
+                    level = levels[i];
+                }
+            }
+
+            /*
+             * We don't need to see if the last run can be merged with a trailing
+             * WS run because setTrailingWSStart() would have done that.
+             */
+            if (runCount == 1 && limit == length) {
+                /* There is only one non-WS run and no trailing WS-run. */
+                getSingleRun(bidiBase, levels[0]);
+            } else /* runCount>1 || limit<length */ {
+                /* allocate and set the runs */
+                BidiRun[] runs;
+                int runIndex, start;
+                byte minLevel = BidiBase.MAX_EXPLICIT_LEVEL + 1;
+                byte maxLevel=0;
+
+                /* now, count a (non-mergeable) WS run */
+                if (limit < length) {
+                    ++runCount;
+                }
+
+                /* runCount > 1 */
+                bidiBase.getRunsMemory(runCount);
+                runs = bidiBase.runsMemory;
+
+                /* set the runs */
+                /* FOOD FOR THOUGHT: this could be optimized, e.g.:
+                 * 464->444, 484->444, 575->555, 595->555
+                 * However, that would take longer. Check also how it would
+                 * interact with BiDi control removal and inserting Marks.
+                 */
+                runIndex = 0;
+
+                /* search for the run limits and initialize visualLimit values with the run lengths */
+                i = 0;
+                do {
+                    /* prepare this run */
+                    start = i;
+                    level = levels[i];
+                    if (level < minLevel) {
+                        minLevel = level;
+                    }
+                    if (level > maxLevel) {
+                        maxLevel = level;
+                    }
+
+                    /* look for the run limit */
+                    while (++i < limit && levels[i] == level) {}
+
+                    /* i is another run limit */
+                    runs[runIndex] = new BidiRun(start, i - start, level);
+                    ++runIndex;
+                } while (i < limit);
+
+                if (limit < length) {
+                    /* there is a separate WS run */
+                    runs[runIndex] = new BidiRun(limit, length - limit, bidiBase.paraLevel);
+                    /* For the trailing WS run, bidiBase.paraLevel is ok even
+                       if contextual multiple paragraphs.                   */
+                    if (bidiBase.paraLevel < minLevel) {
+                        minLevel = bidiBase.paraLevel;
+                    }
+                }
+
+                /* set the object fields */
+                bidiBase.runs = runs;
+                bidiBase.runCount = runCount;
+
+                reorderLine(bidiBase, minLevel, maxLevel);
+
+                /* now add the direction flags and adjust the visualLimit's to be just that */
+                /* this loop will also handle the trailing WS run */
+                limit = 0;
+                for (i = 0; i < runCount; ++i) {
+                    runs[i].level = levels[runs[i].start];
+                    limit = (runs[i].limit += limit);
+                }
+
+                /* Set the embedding level for the trailing WS run. */
+                /* For a RTL paragraph, it will be the *first* run in visual order. */
+                /* For the trailing WS run, bidiBase.paraLevel is ok even if
+                   contextual multiple paragraphs.                          */
+                if (runIndex < runCount) {
+                    int trailingRun = ((bidiBase.paraLevel & 1) != 0)? 0 : runIndex;
+                    runs[trailingRun].level = bidiBase.paraLevel;
+                }
+            }
+        }
+
+        /* handle insert LRM/RLM BEFORE/AFTER run */
+        if (bidiBase.insertPoints.size > 0) {
+            BidiBase.Point point;
+            int runIndex, ip;
+            for (ip = 0; ip < bidiBase.insertPoints.size; ip++) {
+                point = bidiBase.insertPoints.points[ip];
+                runIndex = getRunFromLogicalIndex(bidiBase, point.pos);
+                bidiBase.runs[runIndex].insertRemove |= point.flag;
+            }
+        }
+
+        /* handle remove BiDi control characters */
+        if (bidiBase.controlCount > 0) {
+            int runIndex, ic;
+            char c;
+            for (ic = 0; ic < bidiBase.length; ic++) {
+                c = bidiBase.text[ic];
+                if (BidiBase.IsBidiControlChar(c)) {
+                    runIndex = getRunFromLogicalIndex(bidiBase, ic);
+                    bidiBase.runs[runIndex].insertRemove--;
+                }
+            }
+        }
+    }
+
+    static int[] prepareReorder(byte[] levels, byte[] pMinLevel, byte[] pMaxLevel)
+    {
+        int start;
+        byte level, minLevel, maxLevel;
+
+        if (levels == null || levels.length <= 0) {
+            return null;
+        }
+
+        /* determine minLevel and maxLevel */
+        minLevel = BidiBase.MAX_EXPLICIT_LEVEL + 1;
+        maxLevel = 0;
+        for (start = levels.length; start>0; ) {
+            level = levels[--start];
+            if (level < 0 || level > (BidiBase.MAX_EXPLICIT_LEVEL + 1)) {
+                return null;
+            }
+            if (level < minLevel) {
+                minLevel = level;
+            }
+            if (level > maxLevel) {
+                maxLevel = level;
+            }
+        }
+        pMinLevel[0] = minLevel;
+        pMaxLevel[0] = maxLevel;
+
+        /* initialize the index map */
+        int[] indexMap = new int[levels.length];
+        for (start = levels.length; start > 0; ) {
+            --start;
+            indexMap[start] = start;
+        }
+
+        return indexMap;
+    }
+
+    static int[] reorderVisual(byte[] levels)
+    {
+        byte[] aMinLevel = new byte[1];
+        byte[] aMaxLevel = new byte[1];
+        int start, end, limit, temp;
+        byte minLevel, maxLevel;
+
+        int[] indexMap = prepareReorder(levels, aMinLevel, aMaxLevel);
+        if (indexMap == null) {
+            return null;
+        }
+
+        minLevel = aMinLevel[0];
+        maxLevel = aMaxLevel[0];
+
+        /* nothing to do? */
+        if (minLevel == maxLevel && (minLevel & 1) == 0) {
+            return indexMap;
+        }
+
+        /* reorder only down to the lowest odd level */
+        minLevel |= 1;
+
+        /* loop maxLevel..minLevel */
+        do {
+            start = 0;
+
+            /* loop for all sequences of levels to reorder at the current maxLevel */
+            for ( ; ; ) {
+                /* look for a sequence of levels that are all at >=maxLevel */
+                /* look for the first index of such a sequence */
+                while (start < levels.length && levels[start] < maxLevel) {
+                    ++start;
+                }
+                if (start >= levels.length) {
+                    break;  /* no more such runs */
+                }
+
+                /* look for the limit of such a sequence (the index behind it) */
+                for (limit = start; ++limit < levels.length && levels[limit] >= maxLevel; ) {}
+
+                /*
+                 * Swap the entire interval of indexes from start to limit-1.
+                 * We don't need to swap the levels for the purpose of this
+                 * algorithm: the sequence of levels that we look at does not
+                 * move anyway.
+                 */
+                end = limit - 1;
+                while (start < end) {
+                    temp = indexMap[start];
+                    indexMap[start] = indexMap[end];
+                    indexMap[end] = temp;
+
+                    ++start;
+                    --end;
+                }
+
+                if (limit == levels.length) {
+                    break;  /* no more such sequences */
+                } else {
+                    start = limit + 1;
+                }
+            }
+        } while (--maxLevel >= minLevel);
+
+        return indexMap;
+    }
+
+    static int[] getVisualMap(BidiBase bidiBase)
+    {
+        /* fill a visual-to-logical index map using the runs[] */
+        BidiRun[] runs = bidiBase.runs;
+        int logicalStart, visualStart, visualLimit;
+        int allocLength = bidiBase.length > bidiBase.resultLength ? bidiBase.length
+                                                          : bidiBase.resultLength;
+        int[] indexMap = new int[allocLength];
+
+        visualStart = 0;
+        int idx = 0;
+        for (int j = 0; j < bidiBase.runCount; ++j) {
+            logicalStart = runs[j].start;
+            visualLimit = runs[j].limit;
+            if (runs[j].isEvenRun()) {
+                do { /* LTR */
+                    indexMap[idx++] = logicalStart++;
+                } while (++visualStart < visualLimit);
+            } else {
+                logicalStart += visualLimit - visualStart;  /* logicalLimit */
+                do { /* RTL */
+                    indexMap[idx++] = --logicalStart;
+                } while (++visualStart < visualLimit);
+            }
+            /* visualStart==visualLimit; */
+        }
+
+        if (bidiBase.insertPoints.size > 0) {
+            int markFound = 0, runCount = bidiBase.runCount;
+            int insertRemove, i, j, k;
+            runs = bidiBase.runs;
+            /* count all inserted marks */
+            for (i = 0; i < runCount; i++) {
+                insertRemove = runs[i].insertRemove;
+                if ((insertRemove & (BidiBase.LRM_BEFORE|BidiBase.RLM_BEFORE)) > 0) {
+                    markFound++;
+                }
+                if ((insertRemove & (BidiBase.LRM_AFTER|BidiBase.RLM_AFTER)) > 0) {
+                    markFound++;
+                }
+            }
+            /* move back indexes by number of preceding marks */
+            k = bidiBase.resultLength;
+            for (i = runCount - 1; i >= 0 && markFound > 0; i--) {
+                insertRemove = runs[i].insertRemove;
+                if ((insertRemove & (BidiBase.LRM_AFTER|BidiBase.RLM_AFTER)) > 0) {
+                    indexMap[--k] = BidiBase.MAP_NOWHERE;
+                    markFound--;
+                }
+                visualStart = i > 0 ? runs[i-1].limit : 0;
+                for (j = runs[i].limit - 1; j >= visualStart && markFound > 0; j--) {
+                    indexMap[--k] = indexMap[j];
+                }
+                if ((insertRemove & (BidiBase.LRM_BEFORE|BidiBase.RLM_BEFORE)) > 0) {
+                    indexMap[--k] = BidiBase.MAP_NOWHERE;
+                    markFound--;
+                }
+            }
+        }
+        else if (bidiBase.controlCount > 0) {
+            int runCount = bidiBase.runCount, logicalEnd;
+            int insertRemove, length, i, j, k, m;
+            char uchar;
+            boolean evenRun;
+            runs = bidiBase.runs;
+            visualStart = 0;
+            /* move forward indexes by number of preceding controls */
+            k = 0;
+            for (i = 0; i < runCount; i++, visualStart += length) {
+                length = runs[i].limit - visualStart;
+                insertRemove = runs[i].insertRemove;
+                /* if no control found yet, nothing to do in this run */
+                if ((insertRemove == 0) && (k == visualStart)) {
+                    k += length;
+                    continue;
+                }
+                /* if no control in this run */
+                if (insertRemove == 0) {
+                    visualLimit = runs[i].limit;
+                    for (j = visualStart; j < visualLimit; j++) {
+                        indexMap[k++] = indexMap[j];
+                    }
+                    continue;
+                }
+                logicalStart = runs[i].start;
+                evenRun = runs[i].isEvenRun();
+                logicalEnd = logicalStart + length - 1;
+                for (j = 0; j < length; j++) {
+                    m = evenRun ? logicalStart + j : logicalEnd - j;
+                    uchar = bidiBase.text[m];
+                    if (!BidiBase.IsBidiControlChar(uchar)) {
+                        indexMap[k++] = m;
+                    }
+                }
+            }
+        }
+        if (allocLength == bidiBase.resultLength) {
+            return indexMap;
+        }
+        int[] newMap = new int[bidiBase.resultLength];
+        System.arraycopy(indexMap, 0, newMap, 0, bidiBase.resultLength);
+        return newMap;
+    }
+
+}
diff --git a/tests/test_data/std/jdk/internal/icu/text/BidiRun.class b/tests/test_data/std/jdk/internal/icu/text/BidiRun.class
new file mode 100644
index 0000000000000000000000000000000000000000..221efc2cf9370af9d2ff4f30ad47c6674e5c9642
GIT binary patch
literal 946
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Bm6!kk

literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/icu/text/BidiRun.java b/tests/test_data/std/jdk/internal/icu/text/BidiRun.java
new file mode 100644
index 00000000..4764e718
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/icu/text/BidiRun.java
@@ -0,0 +1,124 @@
+/*
+ * Copyright (c) 2009, 2020, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+/*
+ *******************************************************************************
+ * (C) Copyright IBM Corp. and others, 1996-2009 - All Rights Reserved         *
+ *                                                                             *
+ * The original version of this source code and documentation is copyrighted   *
+ * and owned by IBM, These materials are provided under terms of a License     *
+ * Agreement between IBM and Sun. This technology is protected by multiple     *
+ * US and International patents. This notice and attribution to IBM may not    *
+ * to removed.                                                                 *
+ *******************************************************************************
+ */
+/* Written by Simon Montagu, Matitiahu Allouche
+ * (ported from C code written by Markus W. Scherer)
+ */
+
+package jdk.internal.icu.text;
+
+/**
+ * A BidiRun represents a sequence of characters at the same embedding level.
+ * The Bidi algorithm decomposes a piece of text into sequences of characters
+ * at the same embedding level, each such sequence is called a "run".
+ *
+ * <p>A BidiRun represents such a run by storing its essential properties,
+ * but does not duplicate the characters which form the run.
+ *
+ * <p>The &quot;limit&quot; of the run is the position just after the
+ * last character, i.e., one more than that position.
+ *
+ * <p>This class has no public constructor, and its members cannot be
+ * modified by users.
+ *
+ * @see com.ibm.icu.text.Bidi
+ */
+class BidiRun {
+
+    int start;              /* first logical position of the run */
+    int limit;              /* last visual position of the run +1 */
+    int insertRemove;       /* if >0, flags for inserting LRM/RLM before/after run,
+                               if <0, count of bidi controls within run            */
+    byte level;
+
+    /*
+     * Default constructor
+     *
+     * Note that members start and limit of a run instance have different
+     * meanings depending whether the run is part of the runs array of a Bidi
+     * object, or if it is a reference returned by getVisualRun() or
+     * getLogicalRun().
+     * For a member of the runs array of a Bidi object,
+     *   - start is the first logical position of the run in the source text.
+     *   - limit is one after the last visual position of the run.
+     * For a reference returned by getLogicalRun() or getVisualRun(),
+     *   - start is the first logical position of the run in the source text.
+     *   - limit is one after the last logical position of the run.
+     */
+    BidiRun()
+    {
+        this(0, 0, (byte)0);
+    }
+
+    /*
+     * Constructor
+     */
+    BidiRun(int start, int limit, byte embeddingLevel)
+    {
+        this.start = start;
+        this.limit = limit;
+        this.level = embeddingLevel;
+    }
+
+    /*
+     * Copy the content of a BidiRun instance
+     */
+    void copyFrom(BidiRun run)
+    {
+        this.start = run.start;
+        this.limit = run.limit;
+        this.level = run.level;
+        this.insertRemove = run.insertRemove;
+    }
+
+    /**
+     * Get level of run
+     */
+    byte getEmbeddingLevel()
+    {
+        return level;
+    }
+
+    /**
+     * Check if run level is even
+     * @return true if the embedding level of this run is even, i.e. it is a
+     *  left-to-right run.
+     */
+    boolean isEvenRun()
+    {
+        return (level & 1) == 0;
+    }
+
+}
diff --git a/tests/test_data/std/jdk/internal/icu/text/BidiWriter.class b/tests/test_data/std/jdk/internal/icu/text/BidiWriter.class
new file mode 100644
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/icu/text/BidiWriter.java b/tests/test_data/std/jdk/internal/icu/text/BidiWriter.java
new file mode 100644
index 00000000..3b4c5dd4
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/icu/text/BidiWriter.java
@@ -0,0 +1,451 @@
+/*
+ * Copyright (c) 2015, 2020, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/*
+*******************************************************************************
+*   Copyright (C) 2001-2010, International Business Machines
+*   Corporation and others.  All Rights Reserved.
+*******************************************************************************
+*/
+/* Written by Simon Montagu, Matitiahu Allouche
+ * (ported from C code written by Markus W. Scherer)
+ */
+
+package jdk.internal.icu.text;
+
+import jdk.internal.icu.lang.UCharacter;
+
+final class BidiWriter {
+
+    /** Bidi control code points */
+    static final char LRM_CHAR = 0x200e;
+    static final char RLM_CHAR = 0x200f;
+    static final int MASK_R_AL = (1 << UCharacter.RIGHT_TO_LEFT |
+                                  1 << UCharacter.RIGHT_TO_LEFT_ARABIC);
+
+    private static boolean IsCombining(int type) {
+        return ((1<<type &
+                (1<<UCharacter.NON_SPACING_MARK |
+                 1<<UCharacter.COMBINING_SPACING_MARK |
+                 1<<UCharacter.ENCLOSING_MARK)) != 0);
+    }
+
+    /*
+     * When we have OUTPUT_REVERSE set on writeReordered(), then we
+     * semantically write RTL runs in reverse and later reverse them again.
+     * Instead, we actually write them in forward order to begin with.
+     * However, if the RTL run was to be mirrored, we need to mirror here now
+     * since the implicit second reversal must not do it.
+     * It looks strange to do mirroring in LTR output, but it is only because
+     * we are writing RTL output in reverse.
+     */
+    private static String doWriteForward(String src, int options) {
+        /* optimize for several combinations of options */
+        switch(options&(BidiBase.REMOVE_BIDI_CONTROLS|BidiBase.DO_MIRRORING)) {
+        case 0: {
+            /* simply return the LTR run */
+            return src;
+        }
+        case BidiBase.DO_MIRRORING: {
+            StringBuffer dest = new StringBuffer(src.length());
+
+            /* do mirroring */
+            int i=0;
+            int c;
+
+            do {
+                c = UTF16.charAt(src, i);
+                i += UTF16.getCharCount(c);
+                UTF16.append(dest, UCharacter.getMirror(c));
+            } while(i < src.length());
+            return dest.toString();
+        }
+        case BidiBase.REMOVE_BIDI_CONTROLS: {
+            StringBuilder dest = new StringBuilder(src.length());
+
+            /* copy the LTR run and remove any Bidi control characters */
+            int i = 0;
+            char c;
+            do {
+                c = src.charAt(i++);
+                if(!BidiBase.IsBidiControlChar(c)) {
+                    dest.append(c);
+                }
+            } while(i < src.length());
+            return dest.toString();
+        }
+        default: {
+            StringBuffer dest = new StringBuffer(src.length());
+
+            /* remove Bidi control characters and do mirroring */
+            int i = 0;
+            int c;
+            do {
+                c = UTF16.charAt(src, i);
+                i += UTF16.getCharCount(c);
+                if(!BidiBase.IsBidiControlChar(c)) {
+                    UTF16.append(dest, UCharacter.getMirror(c));
+                }
+            } while(i < src.length());
+                return dest.toString();
+            }
+        } /* end of switch */
+    }
+
+    private static String doWriteForward(char[] text, int start, int limit,
+                                         int options) {
+        return doWriteForward(new String(text, start, limit - start), options);
+    }
+
+    static String writeReverse(String src, int options) {
+        /*
+         * RTL run -
+         *
+         * RTL runs need to be copied to the destination in reverse order
+         * of code points, not code units, to keep Unicode characters intact.
+         *
+         * The general strategy for this is to read the source text
+         * in backward order, collect all code units for a code point
+         * (and optionally following combining characters, see below),
+         * and copy all these code units in ascending order
+         * to the destination for this run.
+         *
+         * Several options request whether combining characters
+         * should be kept after their base characters,
+         * whether Bidi control characters should be removed, and
+         * whether characters should be replaced by their mirror-image
+         * equivalent Unicode characters.
+         */
+        StringBuffer dest = new StringBuffer(src.length());
+
+        /* optimize for several combinations of options */
+        switch (options &
+                (BidiBase.REMOVE_BIDI_CONTROLS |
+                 BidiBase.DO_MIRRORING |
+                 BidiBase.KEEP_BASE_COMBINING)) {
+
+        case 0:
+            /*
+             * With none of the "complicated" options set, the destination
+             * run will have the same length as the source run,
+             * and there is no mirroring and no keeping combining characters
+             * with their base characters.
+             *
+             * XXX: or dest = UTF16.reverse(new StringBuffer(src));
+             */
+
+            int srcLength = src.length();
+
+            /* preserve character integrity */
+            do {
+                /* i is always after the last code unit known to need to be kept
+                 *  in this segment */
+                int i = srcLength;
+
+                /* collect code units for one base character */
+                srcLength -= UTF16.getCharCount(UTF16.charAt(src,
+                                                             srcLength - 1));
+
+                /* copy this base character */
+                dest.append(src.substring(srcLength, i));
+            } while(srcLength > 0);
+            break;
+
+        case BidiBase.KEEP_BASE_COMBINING:
+            /*
+             * Here, too, the destination
+             * run will have the same length as the source run,
+             * and there is no mirroring.
+             * We do need to keep combining characters with their base
+             * characters.
+             */
+            srcLength = src.length();
+
+            /* preserve character integrity */
+            do {
+                /* i is always after the last code unit known to need to be kept
+                 *  in this segment */
+                int c;
+                int i = srcLength;
+
+                /* collect code units and modifier letters for one base
+                 * character */
+                do {
+                    c = UTF16.charAt(src, srcLength - 1);
+                    srcLength -= UTF16.getCharCount(c);
+                } while(srcLength > 0 && IsCombining(UCharacter.getType(c)));
+
+                /* copy this "user character" */
+                dest.append(src.substring(srcLength, i));
+            } while(srcLength > 0);
+            break;
+
+        default:
+            /*
+             * With several "complicated" options set, this is the most
+             * general and the slowest copying of an RTL run.
+             * We will do mirroring, remove Bidi controls, and
+             * keep combining characters with their base characters
+             * as requested.
+             */
+            srcLength = src.length();
+
+            /* preserve character integrity */
+            do {
+                /* i is always after the last code unit known to need to be kept
+                 *  in this segment */
+                int i = srcLength;
+
+                /* collect code units for one base character */
+                int c = UTF16.charAt(src, srcLength - 1);
+                srcLength -= UTF16.getCharCount(c);
+                if ((options & BidiBase.KEEP_BASE_COMBINING) != 0) {
+                    /* collect modifier letters for this base character */
+                    while(srcLength > 0 && IsCombining(UCharacter.getType(c))) {
+                        c = UTF16.charAt(src, srcLength - 1);
+                        srcLength -= UTF16.getCharCount(c);
+                    }
+                }
+
+                if ((options & BidiBase.REMOVE_BIDI_CONTROLS) != 0 &&
+                    BidiBase.IsBidiControlChar(c)) {
+                    /* do not copy this Bidi control character */
+                    continue;
+                }
+
+                /* copy this "user character" */
+                int j = srcLength;
+                if((options & BidiBase.DO_MIRRORING) != 0) {
+                    /* mirror only the base character */
+                    c = UCharacter.getMirror(c);
+                    UTF16.append(dest, c);
+                    j += UTF16.getCharCount(c);
+                }
+                dest.append(src.substring(j, i));
+            } while(srcLength > 0);
+            break;
+        } /* end of switch */
+
+        return dest.toString();
+    }
+
+    static String doWriteReverse(char[] text, int start, int limit, int options) {
+        return writeReverse(new String(text, start, limit - start), options);
+    }
+
+    static String writeReordered(BidiBase bidi, int options) {
+        int run, runCount;
+        StringBuilder dest;
+        char[] text = bidi.text;
+        runCount = bidi.countRuns();
+
+        /*
+         * Option "insert marks" implies BidiBase.INSERT_LRM_FOR_NUMERIC if the
+         * reordering mode (checked below) is appropriate.
+         */
+        if ((bidi.reorderingOptions & BidiBase.OPTION_INSERT_MARKS) != 0) {
+            options |= BidiBase.INSERT_LRM_FOR_NUMERIC;
+            options &= ~BidiBase.REMOVE_BIDI_CONTROLS;
+        }
+        /*
+         * Option "remove controls" implies BidiBase.REMOVE_BIDI_CONTROLS
+         * and cancels BidiBase.INSERT_LRM_FOR_NUMERIC.
+         */
+        if ((bidi.reorderingOptions & BidiBase.OPTION_REMOVE_CONTROLS) != 0) {
+            options |= BidiBase.REMOVE_BIDI_CONTROLS;
+            options &= ~BidiBase.INSERT_LRM_FOR_NUMERIC;
+        }
+        /*
+         * If we do not perform the "inverse Bidi" algorithm, then we
+         * don't need to insert any LRMs, and don't need to test for it.
+         */
+        if ((bidi.reorderingMode != BidiBase.REORDER_INVERSE_NUMBERS_AS_L) &&
+            (bidi.reorderingMode != BidiBase.REORDER_INVERSE_LIKE_DIRECT)  &&
+            (bidi.reorderingMode != BidiBase.REORDER_INVERSE_FOR_NUMBERS_SPECIAL) &&
+            (bidi.reorderingMode != BidiBase.REORDER_RUNS_ONLY)) {
+            options &= ~BidiBase.INSERT_LRM_FOR_NUMERIC;
+        }
+        dest = new StringBuilder((options & BidiBase.INSERT_LRM_FOR_NUMERIC) != 0 ?
+                                 bidi.length * 2 : bidi.length);
+        /*
+         * Iterate through all visual runs and copy the run text segments to
+         * the destination, according to the options.
+         *
+         * The tests for where to insert LRMs ignore the fact that there may be
+         * BN codes or non-BMP code points at the beginning and end of a run;
+         * they may insert LRMs unnecessarily but the tests are faster this way
+         * (this would have to be improved for UTF-8).
+         */
+        if ((options & BidiBase.OUTPUT_REVERSE) == 0) {
+            /* forward output */
+            if ((options & BidiBase.INSERT_LRM_FOR_NUMERIC) == 0) {
+                /* do not insert Bidi controls */
+                for (run = 0; run < runCount; ++run) {
+                    BidiRun bidiRun = bidi.getVisualRun(run);
+                    if (bidiRun.isEvenRun()) {
+                        dest.append(doWriteForward(text, bidiRun.start,
+                                                   bidiRun.limit,
+                                                   options & ~BidiBase.DO_MIRRORING));
+                     } else {
+                        dest.append(doWriteReverse(text, bidiRun.start,
+                                                   bidiRun.limit, options));
+                     }
+                }
+            } else {
+                /* insert Bidi controls for "inverse Bidi" */
+                byte[] dirProps = bidi.dirProps;
+                char uc;
+                int markFlag;
+
+                for (run = 0; run < runCount; ++run) {
+                    BidiRun bidiRun = bidi.getVisualRun(run);
+                    markFlag=0;
+                    /* check if something relevant in insertPoints */
+                    markFlag = bidi.runs[run].insertRemove;
+                    if (markFlag < 0) { /* bidi controls count */
+                        markFlag = 0;
+                    }
+                    if (bidiRun.isEvenRun()) {
+                        if (bidi.isInverse() &&
+                                dirProps[bidiRun.start] != BidiBase.L) {
+                            markFlag |= BidiBase.LRM_BEFORE;
+                        }
+                        if ((markFlag & BidiBase.LRM_BEFORE) != 0) {
+                            uc = LRM_CHAR;
+                        } else if ((markFlag & BidiBase.RLM_BEFORE) != 0) {
+                            uc = RLM_CHAR;
+                        } else {
+                            uc = 0;
+                        }
+                        if (uc != 0) {
+                            dest.append(uc);
+                        }
+                        dest.append(doWriteForward(text,
+                                                   bidiRun.start, bidiRun.limit,
+                                                   options & ~BidiBase.DO_MIRRORING));
+
+                        if (bidi.isInverse() &&
+                             dirProps[bidiRun.limit - 1] != BidiBase.L) {
+                            markFlag |= BidiBase.LRM_AFTER;
+                        }
+                        if ((markFlag & BidiBase.LRM_AFTER) != 0) {
+                            uc = LRM_CHAR;
+                        } else if ((markFlag & BidiBase.RLM_AFTER) != 0) {
+                            uc = RLM_CHAR;
+                        } else {
+                            uc = 0;
+                        }
+                        if (uc != 0) {
+                            dest.append(uc);
+                        }
+                    } else { /* RTL run */
+                        if (bidi.isInverse() &&
+                            !bidi.testDirPropFlagAt(MASK_R_AL,
+                                                    bidiRun.limit - 1)) {
+                            markFlag |= BidiBase.RLM_BEFORE;
+                        }
+                        if ((markFlag & BidiBase.LRM_BEFORE) != 0) {
+                            uc = LRM_CHAR;
+                        } else if ((markFlag & BidiBase.RLM_BEFORE) != 0) {
+                            uc = RLM_CHAR;
+                        } else {
+                            uc = 0;
+                        }
+                        if (uc != 0) {
+                            dest.append(uc);
+                        }
+                        dest.append(doWriteReverse(text, bidiRun.start,
+                                                   bidiRun.limit, options));
+
+                        if(bidi.isInverse() &&
+                                (MASK_R_AL & BidiBase.DirPropFlag(dirProps[bidiRun.start])) == 0) {
+                            markFlag |= BidiBase.RLM_AFTER;
+                        }
+                        if ((markFlag & BidiBase.LRM_AFTER) != 0) {
+                            uc = LRM_CHAR;
+                        } else if ((markFlag & BidiBase.RLM_AFTER) != 0) {
+                            uc = RLM_CHAR;
+                        } else {
+                            uc = 0;
+                        }
+                        if (uc != 0) {
+                            dest.append(uc);
+                        }
+                    }
+                }
+            }
+        } else {
+            /* reverse output */
+            if((options & BidiBase.INSERT_LRM_FOR_NUMERIC) == 0) {
+                /* do not insert Bidi controls */
+                for(run = runCount; --run >= 0; ) {
+                    BidiRun bidiRun = bidi.getVisualRun(run);
+                    if (bidiRun.isEvenRun()) {
+                        dest.append(doWriteReverse(text,
+                                                   bidiRun.start, bidiRun.limit,
+                                                   options & ~BidiBase.DO_MIRRORING));
+                    } else {
+                        dest.append(doWriteForward(text, bidiRun.start,
+                                                   bidiRun.limit, options));
+                    }
+                }
+            } else {
+                /* insert Bidi controls for "inverse Bidi" */
+
+                byte[] dirProps = bidi.dirProps;
+
+                for (run = runCount; --run >= 0; ) {
+                    /* reverse output */
+                    BidiRun bidiRun = bidi.getVisualRun(run);
+                    if (bidiRun.isEvenRun()) {
+                        if (dirProps[bidiRun.limit - 1] != BidiBase.L) {
+                            dest.append(LRM_CHAR);
+                        }
+
+                        dest.append(doWriteReverse(text, bidiRun.start,
+                                bidiRun.limit, options & ~BidiBase.DO_MIRRORING));
+
+                        if (dirProps[bidiRun.start] != BidiBase.L) {
+                            dest.append(LRM_CHAR);
+                        }
+                    } else {
+                        if ((MASK_R_AL & BidiBase.DirPropFlag(dirProps[bidiRun.start])) == 0) {
+                            dest.append(RLM_CHAR);
+                        }
+
+                        dest.append(doWriteForward(text, bidiRun.start,
+                                                   bidiRun.limit, options));
+
+                        if ((MASK_R_AL & BidiBase.DirPropFlag(dirProps[bidiRun.limit - 1])) == 0) {
+                            dest.append(RLM_CHAR);
+                        }
+                    }
+                }
+            }
+        }
+
+        return dest.toString();
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/icu/text/FilteredNormalizer2.class b/tests/test_data/std/jdk/internal/icu/text/FilteredNormalizer2.class
new file mode 100644
index 0000000000000000000000000000000000000000..417369b889ce05a59b71a8b4da218f1952d20785
GIT binary patch
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diff --git a/tests/test_data/std/jdk/internal/icu/text/FilteredNormalizer2.java b/tests/test_data/std/jdk/internal/icu/text/FilteredNormalizer2.java
new file mode 100644
index 00000000..d17eab8c
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/icu/text/FilteredNormalizer2.java
@@ -0,0 +1,266 @@
+/*
+ * Copyright (c) 2015, 2020, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/*
+*******************************************************************************
+*   Copyright (C) 2009-2014, International Business Machines
+*   Corporation and others.  All Rights Reserved.
+*******************************************************************************
+*/
+package jdk.internal.icu.text;
+
+import java.io.IOException;
+
+/**
+ * Normalization filtered by a UnicodeSet.
+ * Normalizes portions of the text contained in the filter set and leaves
+ * portions not contained in the filter set unchanged.
+ * Filtering is done via UnicodeSet.span(..., UnicodeSet.SpanCondition.SIMPLE).
+ * Not-in-the-filter text is treated as "is normalized" and "quick check yes".
+ * This class implements all of (and only) the Normalizer2 API.
+ * An instance of this class is unmodifiable/immutable.
+ * @stable ICU 4.4
+ * @author Markus W. Scherer
+ */
+class FilteredNormalizer2 extends Normalizer2 {
+
+    /**
+     * Constructs a filtered normalizer wrapping any Normalizer2 instance
+     * and a filter set.
+     * Both are aliased and must not be modified or deleted while this object
+     * is used.
+     * The filter set should be frozen; otherwise the performance will suffer greatly.
+     * @param n2 wrapped Normalizer2 instance
+     * @param filterSet UnicodeSet which determines the characters to be normalized
+     * @stable ICU 4.4
+     */
+    public FilteredNormalizer2(Normalizer2 n2, UnicodeSet filterSet) {
+        norm2=n2;
+        set=filterSet;
+    }
+
+    /**
+     * {@inheritDoc}
+     * @stable ICU 4.4
+     */
+    @Override
+    public StringBuilder normalize(CharSequence src, StringBuilder dest) {
+        if(dest==src) {
+            throw new IllegalArgumentException();
+        }
+        dest.setLength(0);
+        normalize(src, dest, UnicodeSet.SpanCondition.SIMPLE);
+        return dest;
+    }
+
+    /**
+     * {@inheritDoc}
+     * @stable ICU 4.6
+     */
+    @Override
+    public Appendable normalize(CharSequence src, Appendable dest) {
+        if(dest==src) {
+            throw new IllegalArgumentException();
+        }
+        return normalize(src, dest, UnicodeSet.SpanCondition.SIMPLE);
+    }
+
+    /**
+     * {@inheritDoc}
+     * @stable ICU 4.4
+     */
+    @Override
+    public StringBuilder normalizeSecondAndAppend(
+            StringBuilder first, CharSequence second) {
+        return normalizeSecondAndAppend(first, second, true);
+    }
+
+    /**
+     * {@inheritDoc}
+     * @stable ICU 4.4
+     */
+    @Override
+    public StringBuilder append(StringBuilder first, CharSequence second) {
+        return normalizeSecondAndAppend(first, second, false);
+    }
+
+    /**
+     * {@inheritDoc}
+     * @stable ICU 4.6
+     */
+    @Override
+    public String getDecomposition(int c) {
+        return set.contains(c) ? norm2.getDecomposition(c) : null;
+    }
+
+    /**
+     * {@inheritDoc}
+     * @stable ICU 49
+     */
+    @Override
+    public int getCombiningClass(int c) {
+        return set.contains(c) ? norm2.getCombiningClass(c) : 0;
+    }
+
+    /**
+     * {@inheritDoc}
+     * @stable ICU 4.4
+     */
+    @Override
+    public boolean isNormalized(CharSequence s) {
+        UnicodeSet.SpanCondition spanCondition=UnicodeSet.SpanCondition.SIMPLE;
+        for(int prevSpanLimit=0; prevSpanLimit<s.length();) {
+            int spanLimit=set.span(s, prevSpanLimit, spanCondition);
+            if(spanCondition==UnicodeSet.SpanCondition.NOT_CONTAINED) {
+                spanCondition=UnicodeSet.SpanCondition.SIMPLE;
+            } else {
+                if(!norm2.isNormalized(s.subSequence(prevSpanLimit, spanLimit))) {
+                    return false;
+                }
+                spanCondition=UnicodeSet.SpanCondition.NOT_CONTAINED;
+            }
+            prevSpanLimit=spanLimit;
+        }
+        return true;
+    }
+
+    /**
+     * {@inheritDoc}
+     * @stable ICU 4.4
+     */
+    @Override
+    public int spanQuickCheckYes(CharSequence s) {
+        UnicodeSet.SpanCondition spanCondition=UnicodeSet.SpanCondition.SIMPLE;
+        for(int prevSpanLimit=0; prevSpanLimit<s.length();) {
+            int spanLimit=set.span(s, prevSpanLimit, spanCondition);
+            if(spanCondition==UnicodeSet.SpanCondition.NOT_CONTAINED) {
+                spanCondition=UnicodeSet.SpanCondition.SIMPLE;
+            } else {
+                int yesLimit=
+                    prevSpanLimit+
+                    norm2.spanQuickCheckYes(s.subSequence(prevSpanLimit, spanLimit));
+                if(yesLimit<spanLimit) {
+                    return yesLimit;
+                }
+                spanCondition=UnicodeSet.SpanCondition.NOT_CONTAINED;
+            }
+            prevSpanLimit=spanLimit;
+        }
+        return s.length();
+    }
+
+    /**
+     * {@inheritDoc}
+     * @stable ICU 4.4
+     */
+    @Override
+    public boolean hasBoundaryBefore(int c) {
+        return !set.contains(c) || norm2.hasBoundaryBefore(c);
+    }
+
+    // Internal: No argument checking, and appends to dest.
+    // Pass as input spanCondition the one that is likely to yield a non-zero
+    // span length at the start of src.
+    // For set=[:age=3.2:], since almost all common characters were in Unicode 3.2,
+    // UnicodeSet.SpanCondition.SIMPLE should be passed in for the start of src
+    // and UnicodeSet.SpanCondition.NOT_CONTAINED should be passed in if we continue after
+    // an in-filter prefix.
+    private Appendable normalize(CharSequence src, Appendable dest,
+                                 UnicodeSet.SpanCondition spanCondition) {
+        // Don't throw away destination buffer between iterations.
+        StringBuilder tempDest=new StringBuilder();
+        try {
+            for(int prevSpanLimit=0; prevSpanLimit<src.length();) {
+                int spanLimit=set.span(src, prevSpanLimit, spanCondition);
+                int spanLength=spanLimit-prevSpanLimit;
+                if(spanCondition==UnicodeSet.SpanCondition.NOT_CONTAINED) {
+                    if(spanLength!=0) {
+                        dest.append(src, prevSpanLimit, spanLimit);
+                    }
+                    spanCondition=UnicodeSet.SpanCondition.SIMPLE;
+                } else {
+                    if(spanLength!=0) {
+                        // Not norm2.normalizeSecondAndAppend() because we do not want
+                        // to modify the non-filter part of dest.
+                        dest.append(norm2.normalize(src.subSequence(prevSpanLimit, spanLimit), tempDest));
+                    }
+                    spanCondition=UnicodeSet.SpanCondition.NOT_CONTAINED;
+                }
+                prevSpanLimit=spanLimit;
+            }
+        } catch(IOException e) {
+            throw new InternalError(e.toString(), e);
+        }
+        return dest;
+    }
+
+    private StringBuilder normalizeSecondAndAppend(StringBuilder first, CharSequence second,
+                                                   boolean doNormalize) {
+        if(first==second) {
+            throw new IllegalArgumentException();
+        }
+        if(first.length()==0) {
+            if(doNormalize) {
+                return normalize(second, first);
+            } else {
+                return first.append(second);
+            }
+        }
+        // merge the in-filter suffix of the first string with the in-filter prefix of the second
+        int prefixLimit=set.span(second, 0, UnicodeSet.SpanCondition.SIMPLE);
+        if(prefixLimit!=0) {
+            CharSequence prefix=second.subSequence(0, prefixLimit);
+            int suffixStart=set.spanBack(first, 0x7fffffff, UnicodeSet.SpanCondition.SIMPLE);
+            if(suffixStart==0) {
+                if(doNormalize) {
+                    norm2.normalizeSecondAndAppend(first, prefix);
+                } else {
+                    norm2.append(first, prefix);
+                }
+            } else {
+                StringBuilder middle=new StringBuilder(
+                        first.subSequence(suffixStart, first.length()));
+                if(doNormalize) {
+                    norm2.normalizeSecondAndAppend(middle, prefix);
+                } else {
+                    norm2.append(middle, prefix);
+                }
+                first.delete(suffixStart, 0x7fffffff).append(middle);
+            }
+        }
+        if(prefixLimit<second.length()) {
+            CharSequence rest=second.subSequence(prefixLimit, second.length());
+            if(doNormalize) {
+                normalize(rest, first, UnicodeSet.SpanCondition.NOT_CONTAINED);
+            } else {
+                first.append(rest);
+            }
+        }
+        return first;
+    }
+
+    private Normalizer2 norm2;
+    private UnicodeSet set;
+};
diff --git a/tests/test_data/std/jdk/internal/icu/text/Normalizer2.class b/tests/test_data/std/jdk/internal/icu/text/Normalizer2.class
new file mode 100644
index 0000000000000000000000000000000000000000..8ddba7c3a8ac80093c4e35ca4947ad21bc8ba144
GIT binary patch
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/icu/text/Normalizer2.java b/tests/test_data/std/jdk/internal/icu/text/Normalizer2.java
new file mode 100644
index 00000000..db0d1fc2
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/icu/text/Normalizer2.java
@@ -0,0 +1,276 @@
+/*
+ * Copyright (c) 2015, 2022, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/*
+ *******************************************************************************
+ *   Copyright (C) 2009-2014, International Business Machines
+ *   Corporation and others.  All Rights Reserved.
+ *******************************************************************************
+ */
+
+package jdk.internal.icu.text;
+
+import jdk.internal.icu.impl.Norm2AllModes;
+
+/**
+ * Unicode normalization functionality for standard Unicode normalization or
+ * for using custom mapping tables.
+ * All instances of this class are unmodifiable/immutable.
+ * The Normalizer2 class is not intended for public subclassing.
+ * <p>
+ * The primary functions are to produce a normalized string and to detect whether
+ * a string is already normalized.
+ * The most commonly used normalization forms are those defined in
+ * <a href="https://www.unicode.org/reports/tr15/">Unicode Standard Annex #15:
+ * Unicode Normalization Forms</a>.
+ * However, this API supports additional normalization forms for specialized purposes.
+ * For example, NFKC_Casefold is provided via getInstance("nfkc_cf", COMPOSE)
+ * and can be used in implementations of UTS #46.
+ * <p>
+ * Not only are the standard compose and decompose modes supplied,
+ * but additional modes are provided as documented in the Mode enum.
+ * <p>
+ * Some of the functions in this class identify normalization boundaries.
+ * At a normalization boundary, the portions of the string
+ * before it and starting from it do not interact and can be handled independently.
+ * <p>
+ * The spanQuickCheckYes() stops at a normalization boundary.
+ * When the goal is a normalized string, then the text before the boundary
+ * can be copied, and the remainder can be processed with normalizeSecondAndAppend().
+ * <p>
+ * The hasBoundaryBefore(), hasBoundaryAfter() and isInert() functions test whether
+ * a character is guaranteed to be at a normalization boundary,
+ * regardless of context.
+ * This is used for moving from one normalization boundary to the next
+ * or preceding boundary, and for performing iterative normalization.
+ * <p>
+ * Iterative normalization is useful when only a small portion of a
+ * longer string needs to be processed.
+ * For example, in ICU, iterative normalization is used by the NormalizationTransliterator
+ * (to avoid replacing already-normalized text) and ucol_nextSortKeyPart()
+ * (to process only the substring for which sort key bytes are computed).
+ * <p>
+ * The set of normalization boundaries returned by these functions may not be
+ * complete: There may be more boundaries that could be returned.
+ * Different functions may return different boundaries.
+ * @stable ICU 4.4
+ * @author Markus W. Scherer
+ */
+public abstract class Normalizer2 {
+
+    /**
+     * Returns a Normalizer2 instance for Unicode NFC normalization.
+     * Same as getInstance(null, "nfc", Mode.COMPOSE).
+     * Returns an unmodifiable singleton instance.
+     * @return the requested Normalizer2, if successful
+     * @stable ICU 49
+     */
+    public static Normalizer2 getNFCInstance() {
+        return Norm2AllModes.getNFCInstance().comp;
+    }
+
+    /**
+     * Returns a Normalizer2 instance for Unicode NFD normalization.
+     * Same as getInstance(null, "nfc", Mode.DECOMPOSE).
+     * Returns an unmodifiable singleton instance.
+     * @return the requested Normalizer2, if successful
+     * @stable ICU 49
+     */
+    public static Normalizer2 getNFDInstance() {
+        return Norm2AllModes.getNFCInstance().decomp;
+    }
+
+    /**
+     * Returns a Normalizer2 instance for Unicode NFKC normalization.
+     * Same as getInstance(null, "nfkc", Mode.COMPOSE).
+     * Returns an unmodifiable singleton instance.
+     * @return the requested Normalizer2, if successful
+     * @stable ICU 49
+     */
+    public static Normalizer2 getNFKCInstance() {
+        return Norm2AllModes.getNFKCInstance().comp;
+    }
+
+    /**
+     * Returns a Normalizer2 instance for Unicode NFKD normalization.
+     * Same as getInstance(null, "nfkc", Mode.DECOMPOSE).
+     * Returns an unmodifiable singleton instance.
+     * @return the requested Normalizer2, if successful
+     * @stable ICU 49
+     */
+    public static Normalizer2 getNFKDInstance() {
+        return Norm2AllModes.getNFKCInstance().decomp;
+    }
+
+    /**
+     * Returns the normalized form of the source string.
+     * @param src source string
+     * @return normalized src
+     * @stable ICU 4.4
+     */
+    public String normalize(CharSequence src) {
+        if(src instanceof String) {
+            // Fastpath: Do not construct a new String if the src is a String
+            // and is already normalized.
+            int spanLength=spanQuickCheckYes(src);
+            if(spanLength==src.length()) {
+                return (String)src;
+            }
+            if (spanLength != 0) {
+                StringBuilder sb=new StringBuilder(src.length()).append(src, 0, spanLength);
+                return normalizeSecondAndAppend(sb, src.subSequence(spanLength, src.length())).toString();
+            }
+        }
+        return normalize(src, new StringBuilder(src.length())).toString();
+    }
+
+    /**
+     * Writes the normalized form of the source string to the destination string
+     * (replacing its contents) and returns the destination string.
+     * The source and destination strings must be different objects.
+     * @param src source string
+     * @param dest destination string; its contents is replaced with normalized src
+     * @return dest
+     * @stable ICU 4.4
+     */
+    public abstract StringBuilder normalize(CharSequence src, StringBuilder dest);
+
+    /**
+     * Writes the normalized form of the source string to the destination Appendable
+     * and returns the destination Appendable.
+     * The source and destination strings must be different objects.
+     *
+     * <p>Any {@link java.io.IOException} is wrapped into a {@link com.ibm.icu.util.ICUUncheckedIOException}.
+     *
+     * @param src source string
+     * @param dest destination Appendable; gets normalized src appended
+     * @return dest
+     * @stable ICU 4.6
+     */
+    public abstract Appendable normalize(CharSequence src, Appendable dest);
+
+    /**
+     * Appends the normalized form of the second string to the first string
+     * (merging them at the boundary) and returns the first string.
+     * The result is normalized if the first string was normalized.
+     * The first and second strings must be different objects.
+     * @param first string, should be normalized
+     * @param second string, will be normalized
+     * @return first
+     * @stable ICU 4.4
+     */
+    public abstract StringBuilder normalizeSecondAndAppend(
+            StringBuilder first, CharSequence second);
+
+    /**
+     * Appends the second string to the first string
+     * (merging them at the boundary) and returns the first string.
+     * The result is normalized if both the strings were normalized.
+     * The first and second strings must be different objects.
+     * @param first string, should be normalized
+     * @param second string, should be normalized
+     * @return first
+     * @stable ICU 4.4
+     */
+    public abstract StringBuilder append(StringBuilder first, CharSequence second);
+
+    /**
+     * Gets the decomposition mapping of c.
+     * Roughly equivalent to normalizing the String form of c
+     * on a DECOMPOSE Normalizer2 instance, but much faster, and except that this function
+     * returns null if c does not have a decomposition mapping in this instance's data.
+     * This function is independent of the mode of the Normalizer2.
+     * @param c code point
+     * @return c's decomposition mapping, if any; otherwise null
+     * @stable ICU 4.6
+     */
+    public abstract String getDecomposition(int c);
+
+    /**
+     * Gets the combining class of c.
+     * The default implementation returns 0
+     * but all standard implementations return the Unicode Canonical_Combining_Class value.
+     * @param c code point
+     * @return c's combining class
+     * @stable ICU 49
+     */
+    public int getCombiningClass(int c) { return 0; }
+
+    /**
+     * Tests if the string is normalized.
+     * Internally, in cases where the quickCheck() method would return "maybe"
+     * (which is only possible for the two COMPOSE modes) this method
+     * resolves to "yes" or "no" to provide a definitive result,
+     * at the cost of doing more work in those cases.
+     * @param s input string
+     * @return true if s is normalized
+     * @stable ICU 4.4
+     */
+    public abstract boolean isNormalized(CharSequence s);
+
+    /**
+     * Returns the end of the normalized substring of the input string.
+     * In other words, with <code>end=spanQuickCheckYes(s);</code>
+     * the substring <code>s.subSequence(0, end)</code>
+     * will pass the quick check with a "yes" result.
+     * <p>
+     * The returned end index is usually one or more characters before the
+     * "no" or "maybe" character: The end index is at a normalization boundary.
+     * (See the class documentation for more about normalization boundaries.)
+     * <p>
+     * When the goal is a normalized string and most input strings are expected
+     * to be normalized already, then call this method,
+     * and if it returns a prefix shorter than the input string,
+     * copy that prefix and use normalizeSecondAndAppend() for the remainder.
+     * @param s input string
+     * @return "yes" span end index
+     * @stable ICU 4.4
+     */
+    public abstract int spanQuickCheckYes(CharSequence s);
+
+    /**
+     * Tests if the character always has a normalization boundary before it,
+     * regardless of context.
+     * If true, then the character does not normalization-interact with
+     * preceding characters.
+     * In other words, a string containing this character can be normalized
+     * by processing portions before this character and starting from this
+     * character independently.
+     * This is used for iterative normalization. See the class documentation for details.
+     * @param c character to test
+     * @return true if c has a normalization boundary before it
+     * @stable ICU 4.4
+     */
+    public abstract boolean hasBoundaryBefore(int c);
+
+    /**
+     * Sole constructor.  (For invocation by subclass constructors,
+     * typically implicit.)
+     * @internal
+     * deprecated This API is ICU internal only.
+     */
+    protected Normalizer2() {
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/icu/text/NormalizerBase$1.class b/tests/test_data/std/jdk/internal/icu/text/NormalizerBase$1.class
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diff --git a/tests/test_data/std/jdk/internal/icu/text/NormalizerBase$Mode.class b/tests/test_data/std/jdk/internal/icu/text/NormalizerBase$Mode.class
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diff --git a/tests/test_data/std/jdk/internal/icu/text/NormalizerBase$ModeImpl.class b/tests/test_data/std/jdk/internal/icu/text/NormalizerBase$ModeImpl.class
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diff --git a/tests/test_data/std/jdk/internal/icu/text/NormalizerBase$NFC32ModeImpl.class b/tests/test_data/std/jdk/internal/icu/text/NormalizerBase$NFC32ModeImpl.class
new file mode 100644
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GIT binary patch
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diff --git a/tests/test_data/std/jdk/internal/icu/text/NormalizerBase$NFCMode.class b/tests/test_data/std/jdk/internal/icu/text/NormalizerBase$NFCMode.class
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GIT binary patch
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diff --git a/tests/test_data/std/jdk/internal/icu/text/NormalizerBase$NFCModeImpl.class b/tests/test_data/std/jdk/internal/icu/text/NormalizerBase$NFCModeImpl.class
new file mode 100644
index 0000000000000000000000000000000000000000..f47f68d5dcea20a2d245fb8d86f5c2b8406a9d52
GIT binary patch
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diff --git a/tests/test_data/std/jdk/internal/icu/text/NormalizerBase$NFD32ModeImpl.class b/tests/test_data/std/jdk/internal/icu/text/NormalizerBase$NFD32ModeImpl.class
new file mode 100644
index 0000000000000000000000000000000000000000..76e93f4506d0faddfb52706c7f8ffd5f26dbd8bc
GIT binary patch
literal 1085
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literal 0
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diff --git a/tests/test_data/std/jdk/internal/icu/text/NormalizerBase$NFDMode.class b/tests/test_data/std/jdk/internal/icu/text/NormalizerBase$NFDMode.class
new file mode 100644
index 0000000000000000000000000000000000000000..f7041e71d8bae39ba0a03cde8f5d93448e2c589e
GIT binary patch
literal 1074
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diff --git a/tests/test_data/std/jdk/internal/icu/text/NormalizerBase$NFDModeImpl.class b/tests/test_data/std/jdk/internal/icu/text/NormalizerBase$NFDModeImpl.class
new file mode 100644
index 0000000000000000000000000000000000000000..3c13726b2f5d3d69b31d7ea11cadd6a1cc8aa221
GIT binary patch
literal 810
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diff --git a/tests/test_data/std/jdk/internal/icu/text/NormalizerBase$NFKC32ModeImpl.class b/tests/test_data/std/jdk/internal/icu/text/NormalizerBase$NFKC32ModeImpl.class
new file mode 100644
index 0000000000000000000000000000000000000000..3fa6019cbc247d5a7e1ca23ec618ff013f065a5f
GIT binary patch
literal 1089
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literal 0
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diff --git a/tests/test_data/std/jdk/internal/icu/text/NormalizerBase$NFKCMode.class b/tests/test_data/std/jdk/internal/icu/text/NormalizerBase$NFKCMode.class
new file mode 100644
index 0000000000000000000000000000000000000000..c3341b4e4af68902e5b6b453fcfaf064e3a36281
GIT binary patch
literal 1081
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diff --git a/tests/test_data/std/jdk/internal/icu/text/NormalizerBase$NFKCModeImpl.class b/tests/test_data/std/jdk/internal/icu/text/NormalizerBase$NFKCModeImpl.class
new file mode 100644
index 0000000000000000000000000000000000000000..1a9903867f9a2a6d361eb0652af5328d0dbc1403
GIT binary patch
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diff --git a/tests/test_data/std/jdk/internal/icu/text/NormalizerBase$NFKD32ModeImpl.class b/tests/test_data/std/jdk/internal/icu/text/NormalizerBase$NFKD32ModeImpl.class
new file mode 100644
index 0000000000000000000000000000000000000000..3cc0d4fe1b825e92f7b203214a19237fc3aaee97
GIT binary patch
literal 1089
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diff --git a/tests/test_data/std/jdk/internal/icu/text/NormalizerBase$NFKDMode.class b/tests/test_data/std/jdk/internal/icu/text/NormalizerBase$NFKDMode.class
new file mode 100644
index 0000000000000000000000000000000000000000..b7173616a36b9d5e873c891cb8e4a7b05a0da505
GIT binary patch
literal 1081
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diff --git a/tests/test_data/std/jdk/internal/icu/text/NormalizerBase$NFKDModeImpl.class b/tests/test_data/std/jdk/internal/icu/text/NormalizerBase$NFKDModeImpl.class
new file mode 100644
index 0000000000000000000000000000000000000000..55222f8c46482ee533fe32c20f88c3c860224d74
GIT binary patch
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diff --git a/tests/test_data/std/jdk/internal/icu/text/NormalizerBase$NONEMode.class b/tests/test_data/std/jdk/internal/icu/text/NormalizerBase$NONEMode.class
new file mode 100644
index 0000000000000000000000000000000000000000..eca85280f632dc82989b5e0fe6aa44905f7dcb4c
GIT binary patch
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diff --git a/tests/test_data/std/jdk/internal/icu/text/NormalizerBase$Unicode32.class b/tests/test_data/std/jdk/internal/icu/text/NormalizerBase$Unicode32.class
new file mode 100644
index 0000000000000000000000000000000000000000..f0d6d0babdad2c283760c76d9f926e60727ee971
GIT binary patch
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diff --git a/tests/test_data/std/jdk/internal/icu/text/NormalizerBase.class b/tests/test_data/std/jdk/internal/icu/text/NormalizerBase.class
new file mode 100644
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diff --git a/tests/test_data/std/jdk/internal/icu/text/NormalizerBase.java b/tests/test_data/std/jdk/internal/icu/text/NormalizerBase.java
new file mode 100644
index 00000000..f2566d9d
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/icu/text/NormalizerBase.java
@@ -0,0 +1,784 @@
+/*
+ * Copyright (c) 2005, 2022, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/*
+ *******************************************************************************
+ * Copyright (C) 2000-2014, International Business Machines Corporation and
+ * others. All Rights Reserved.
+ *******************************************************************************
+ */
+package jdk.internal.icu.text;
+
+import jdk.internal.icu.impl.Norm2AllModes;
+
+import java.text.CharacterIterator;
+import java.text.Normalizer;
+
+/**
+ * Unicode Normalization
+ *
+ * <h2>Unicode normalization API</h2>
+ *
+ * <code>normalize</code> transforms Unicode text into an equivalent composed or
+ * decomposed form, allowing for easier sorting and searching of text.
+ * <code>normalize</code> supports the standard normalization forms described in
+ * <a href="https://www.unicode.org/reports/tr15/" target="unicode">
+ * Unicode Standard Annex #15 &mdash; Unicode Normalization Forms</a>.
+ *
+ * Characters with accents or other adornments can be encoded in
+ * several different ways in Unicode.  For example, take the character A-acute.
+ * In Unicode, this can be encoded as a single character (the
+ * "composed" form):
+ *
+ * <pre>
+ *      00C1    LATIN CAPITAL LETTER A WITH ACUTE
+ * </pre>
+ *
+ * or as two separate characters (the "decomposed" form):
+ *
+ * <pre>
+ *      0041    LATIN CAPITAL LETTER A
+ *      0301    COMBINING ACUTE ACCENT
+ * </pre>
+ *
+ * To a user of your program, however, both of these sequences should be
+ * treated as the same "user-level" character "A with acute accent".  When you
+ * are searching or comparing text, you must ensure that these two sequences are
+ * treated equivalently.  In addition, you must handle characters with more than
+ * one accent.  Sometimes the order of a character's combining accents is
+ * significant, while in other cases accent sequences in different orders are
+ * really equivalent.
+ *
+ * Similarly, the string "ffi" can be encoded as three separate letters:
+ *
+ * <pre>
+ *      0066    LATIN SMALL LETTER F
+ *      0066    LATIN SMALL LETTER F
+ *      0069    LATIN SMALL LETTER I
+ * </pre>
+ *
+ * or as the single character
+ *
+ * <pre>
+ *      FB03    LATIN SMALL LIGATURE FFI
+ * </pre>
+ *
+ * The ffi ligature is not a distinct semantic character, and strictly speaking
+ * it shouldn't be in Unicode at all, but it was included for compatibility
+ * with existing character sets that already provided it.  The Unicode standard
+ * identifies such characters by giving them "compatibility" decompositions
+ * into the corresponding semantic characters.  When sorting and searching, you
+ * will often want to use these mappings.
+ *
+ * <code>normalize</code> helps solve these problems by transforming text into
+ * the canonical composed and decomposed forms as shown in the first example
+ * above. In addition, you can have it perform compatibility decompositions so
+ * that you can treat compatibility characters the same as their equivalents.
+ * Finally, <code>normalize</code> rearranges accents into the proper canonical
+ * order, so that you do not have to worry about accent rearrangement on your
+ * own.
+ *
+ * Form FCD, "Fast C or D", is also designed for collation.
+ * It allows to work on strings that are not necessarily normalized
+ * with an algorithm (like in collation) that works under "canonical closure",
+ * i.e., it treats precomposed characters and their decomposed equivalents the
+ * same.
+ *
+ * It is not a normalization form because it does not provide for uniqueness of
+ * representation. Multiple strings may be canonically equivalent (their NFDs
+ * are identical) and may all conform to FCD without being identical themselves.
+ *
+ * The form is defined such that the "raw decomposition", the recursive
+ * canonical decomposition of each character, results in a string that is
+ * canonically ordered. This means that precomposed characters are allowed for
+ * as long as their decompositions do not need canonical reordering.
+ *
+ * Its advantage for a process like collation is that all NFD and most NFC texts
+ * - and many unnormalized texts - already conform to FCD and do not need to be
+ * normalized (NFD) for such a process. The FCD quick check will return YES for
+ * most strings in practice.
+ *
+ * normalize(FCD) may be implemented with NFD.
+ *
+ * For more details on FCD see Unicode Technical Note #5 (Canonical Equivalence in Applications):
+ * http://www.unicode.org/notes/tn5/#FCD
+ *
+ * ICU collation performs either NFD or FCD normalization automatically if
+ * normalization is turned on for the collator object. Beyond collation and
+ * string search, normalized strings may be useful for string equivalence
+ * comparisons, transliteration/transcription, unique representations, etc.
+ *
+ * The W3C generally recommends to exchange texts in NFC.
+ * Note also that most legacy character encodings use only precomposed forms and
+ * often do not encode any combining marks by themselves. For conversion to such
+ * character encodings the Unicode text needs to be normalized to NFC.
+ * For more usage examples, see the Unicode Standard Annex.
+ *
+ * Note: The Normalizer class also provides API for iterative normalization.
+ * While the setIndex() and getIndex() refer to indices in the
+ * underlying Unicode input text, the next() and previous() methods
+ * iterate through characters in the normalized output.
+ * This means that there is not necessarily a one-to-one correspondence
+ * between characters returned by next() and previous() and the indices
+ * passed to and returned from setIndex() and getIndex().
+ * It is for this reason that Normalizer does not implement the CharacterIterator interface.
+ *
+ * @stable ICU 2.8
+ */
+// Original filename in ICU4J: Normalizer.java
+public final class NormalizerBase implements Cloneable {
+
+    // The input text and our position in it
+    private UCharacterIterator  text;
+    private Normalizer2         norm2;
+    private Mode                mode;
+    private int                 options;
+
+    // The normalization buffer is the result of normalization
+    // of the source in [currentIndex..nextIndex] .
+    private int                 currentIndex;
+    private int                 nextIndex;
+
+    // A buffer for holding intermediate results
+    private StringBuilder       buffer;
+    private int                 bufferPos;
+
+    // Helper classes to defer loading of normalization data.
+    private static final class ModeImpl {
+        private ModeImpl(Normalizer2 n2) {
+            normalizer2 = n2;
+        }
+        private final Normalizer2 normalizer2;
+    }
+
+    private static final class NFDModeImpl {
+        private static final ModeImpl INSTANCE = new ModeImpl(Normalizer2.getNFDInstance());
+    }
+
+    private static final class NFKDModeImpl {
+        private static final ModeImpl INSTANCE = new ModeImpl(Normalizer2.getNFKDInstance());
+    }
+
+    private static final class NFCModeImpl {
+        private static final ModeImpl INSTANCE = new ModeImpl(Normalizer2.getNFCInstance());
+    }
+
+    private static final class NFKCModeImpl {
+        private static final ModeImpl INSTANCE = new ModeImpl(Normalizer2.getNFKCInstance());
+    }
+
+    private static final class Unicode32 {
+        private static final UnicodeSet INSTANCE = new UnicodeSet("[:age=3.2:]").freeze();
+    }
+
+    private static final class NFD32ModeImpl {
+        private static final ModeImpl INSTANCE =
+            new ModeImpl(new FilteredNormalizer2(Normalizer2.getNFDInstance(),
+                                                 Unicode32.INSTANCE));
+    }
+
+    private static final class NFKD32ModeImpl {
+        private static final ModeImpl INSTANCE =
+            new ModeImpl(new FilteredNormalizer2(Normalizer2.getNFKDInstance(),
+                                                 Unicode32.INSTANCE));
+    }
+
+    private static final class NFC32ModeImpl {
+        private static final ModeImpl INSTANCE =
+            new ModeImpl(new FilteredNormalizer2(Normalizer2.getNFCInstance(),
+                                                 Unicode32.INSTANCE));
+    }
+
+    private static final class NFKC32ModeImpl {
+        private static final ModeImpl INSTANCE =
+            new ModeImpl(new FilteredNormalizer2(Normalizer2.getNFKCInstance(),
+                                                 Unicode32.INSTANCE));
+    }
+
+    /**
+     * Options bit set value to select Unicode 3.2 normalization
+     * (except NormalizationCorrections).
+     * At most one Unicode version can be selected at a time.
+     * @stable ICU 2.6
+     */
+    public static final int UNICODE_3_2=0x20;
+
+    public static final int UNICODE_3_2_0_ORIGINAL=UNICODE_3_2;
+
+    /*
+     * Default option for the latest Unicode normalization. This option is
+     * provided mainly for testing.
+     * The value zero means that normalization is done with the fixes for
+     *   - Corrigendum 4 (Five CJK Canonical Mapping Errors)
+     *   - Corrigendum 5 (Normalization Idempotency)
+     */
+    public static final int UNICODE_LATEST = 0x00;
+
+    /**
+     * Constant indicating that the end of the iteration has been reached.
+     * This is guaranteed to have the same value as {@link UCharacterIterator#DONE}.
+     * @stable ICU 2.8
+     */
+    public static final int DONE = UCharacterIterator.DONE;
+
+    /**
+     * Constants for normalization modes.
+     * <p>
+     * The Mode class is not intended for public subclassing.
+     * Only the Mode constants provided by the Normalizer class should be used,
+     * and any fields or methods should not be called or overridden by users.
+     * @stable ICU 2.8
+     */
+    public abstract static class Mode {
+
+        /**
+         * Sole constructor
+         * @internal
+         * @deprecated This API is ICU internal only.
+         */
+        @Deprecated
+        protected Mode() {
+        }
+
+        /**
+         * @internal
+         * @deprecated This API is ICU internal only.
+         */
+        @Deprecated
+        protected abstract Normalizer2 getNormalizer2(int options);
+    }
+
+    private static Mode toMode(Normalizer.Form form) {
+        switch (form) {
+        case NFC :
+            return NFC;
+        case NFD :
+            return NFD;
+        case NFKC :
+            return NFKC;
+        case NFKD :
+            return NFKD;
+        }
+
+        throw new IllegalArgumentException("Unexpected normalization form: " +
+                                           form);
+    }
+
+    private static final class NONEMode extends Mode {
+        protected Normalizer2 getNormalizer2(int options) { return Norm2AllModes.NOOP_NORMALIZER2; }
+    }
+
+    private static final class NFDMode extends Mode {
+        protected Normalizer2 getNormalizer2(int options) {
+            return (options&UNICODE_3_2) != 0 ?
+                    NFD32ModeImpl.INSTANCE.normalizer2 :
+                    NFDModeImpl.INSTANCE.normalizer2;
+        }
+    }
+
+    private static final class NFKDMode extends Mode {
+        protected Normalizer2 getNormalizer2(int options) {
+            return (options&UNICODE_3_2) != 0 ?
+                    NFKD32ModeImpl.INSTANCE.normalizer2 :
+                    NFKDModeImpl.INSTANCE.normalizer2;
+        }
+    }
+
+    private static final class NFCMode extends Mode {
+        protected Normalizer2 getNormalizer2(int options) {
+            return (options&UNICODE_3_2) != 0 ?
+                    NFC32ModeImpl.INSTANCE.normalizer2 :
+                    NFCModeImpl.INSTANCE.normalizer2;
+        }
+    }
+
+    private static final class NFKCMode extends Mode {
+        protected Normalizer2 getNormalizer2(int options) {
+            return (options&UNICODE_3_2) != 0 ?
+                    NFKC32ModeImpl.INSTANCE.normalizer2 :
+                    NFKCModeImpl.INSTANCE.normalizer2;
+        }
+    }
+
+    /**
+     * No decomposition/composition.
+     * @stable ICU 2.8
+     */
+    public static final Mode NONE = new NONEMode();
+
+    /**
+     * Canonical decomposition.
+     * @stable ICU 2.8
+     */
+    public static final Mode NFD = new NFDMode();
+
+    /**
+     * Compatibility decomposition.
+     * @stable ICU 2.8
+     */
+    public static final Mode NFKD = new NFKDMode();
+
+    /**
+     * Canonical decomposition followed by canonical composition.
+     * @stable ICU 2.8
+     */
+    public static final Mode NFC = new NFCMode();
+
+    public static final Mode NFKC =new NFKCMode();
+
+    //-------------------------------------------------------------------------
+    // Iterator constructors
+    //-------------------------------------------------------------------------
+
+    /**
+     * Creates a new {@code NormalizerBase} object for iterating over the
+     * normalized form of a given string.
+     * <p>
+     * The {@code options} parameter specifies which optional
+     * {@code NormalizerBase} features are to be enabled for this object.
+     * <p>
+     * @param str  The string to be normalized.  The normalization
+     *              will start at the beginning of the string.
+     *
+     * @param mode The normalization mode.
+     *
+     * @param opt Any optional features to be enabled.
+     *            Currently the only available option is {@link #UNICODE_3_2}.
+     *            If you want the default behavior corresponding to one of the
+     *            standard Unicode Normalization Forms, use 0 for this argument.
+     * @stable ICU 2.6
+     */
+    public NormalizerBase(String str, Mode mode, int opt) {
+        this.text = UCharacterIterator.getInstance(str);
+        this.mode = mode;
+        this.options=opt;
+        norm2 = mode.getNormalizer2(opt);
+        buffer = new StringBuilder();
+    }
+
+    public NormalizerBase(String str, Mode mode) {
+       this(str, mode, 0);
+    }
+
+
+    /**
+     * Creates a new {@code NormalizerBase} object for iterating over the
+     * normalized form of the given text.
+     * <p>
+     * @param iter  The input text to be normalized.  The normalization
+     *              will start at the beginning of the string.
+     *
+     * @param mode  The normalization mode.
+     *
+     * @param opt Any optional features to be enabled.
+     *            Currently the only available option is {@link #UNICODE_3_2}.
+     *            If you want the default behavior corresponding to one of the
+     *            standard Unicode Normalization Forms, use 0 for this argument.
+     * @stable ICU 2.6
+     */
+    public NormalizerBase(CharacterIterator iter, Mode mode, int opt) {
+        this.text = UCharacterIterator.getInstance((CharacterIterator)iter.clone());
+        this.mode = mode;
+        this.options = opt;
+        norm2 = mode.getNormalizer2(opt);
+        buffer = new StringBuilder();
+    }
+
+    public NormalizerBase(CharacterIterator iter, Mode mode) {
+       this(iter, mode, 0);
+    }
+
+    /**
+     * Clones this {@code NormalizerBase} object.  All properties of this
+     * object are duplicated in the new object, including the cloning of any
+     * {@link CharacterIterator} that was passed in to the constructor
+     * or to {@link #setText(CharacterIterator) setText}.
+     * However, the text storage underlying
+     * the {@code CharacterIterator} is not duplicated unless the
+     * iterator's {@code clone} method does so.
+     * @stable ICU 2.8
+     */
+    public Object clone() {
+        try {
+            NormalizerBase copy = (NormalizerBase) super.clone();
+            copy.text = (UCharacterIterator) text.clone();
+            copy.mode = mode;
+            copy.options = options;
+            copy.norm2 = norm2;
+            copy.buffer = new StringBuilder(buffer);
+            copy.bufferPos = bufferPos;
+            copy.currentIndex = currentIndex;
+            copy.nextIndex = nextIndex;
+            return copy;
+        }
+        catch (CloneNotSupportedException e) {
+            throw new InternalError(e.toString(), e);
+        }
+    }
+
+    /**
+     * Normalizes a {@code String} using the given normalization operation.
+     * <p>
+     * The {@code options} parameter specifies which optional
+     * {@code NormalizerBase} features are to be enabled for this operation.
+     * Currently the only available option is {@link #UNICODE_3_2}.
+     * If you want the default behavior corresponding to one of the standard
+     * Unicode Normalization Forms, use 0 for this argument.
+     * <p>
+     * @param str       the input string to be normalized.
+     * @param mode      the normalization mode
+     * @param options   the optional features to be enabled.
+     * @return String   the normalized string
+     * @stable ICU 2.6
+     */
+    public static String normalize(String str, Mode mode, int options) {
+        return mode.getNormalizer2(options).normalize(str);
+    }
+
+    public static String normalize(String str, Normalizer.Form form) {
+        return NormalizerBase.normalize(str, toMode(form), UNICODE_LATEST);
+    }
+
+    public static String normalize(String str, Normalizer.Form form, int options) {
+        return NormalizerBase.normalize(str, toMode(form), options);
+    }
+
+    /**
+     * Test if a string is in a given normalization form.
+     * This is semantically equivalent to source.equals(normalize(source, mode)).
+     *
+     * Unlike quickCheck(), this function returns a definitive result,
+     * never a "maybe".
+     * For NFD, NFKD, and FCD, both functions work exactly the same.
+     * For NFC and NFKC where quickCheck may return "maybe", this function will
+     * perform further tests to arrive at a true/false result.
+     * @param str       the input string to be checked to see if it is
+     *                   normalized
+     * @param mode      the normalization mode
+     * @param options   Options for use with exclusion set and tailored Normalization
+     *                  The only option that is currently recognized is UNICODE_3_2
+     * @see #isNormalized
+     * @stable ICU 2.6
+     */
+    public static boolean isNormalized(String str, Mode mode, int options) {
+        return mode.getNormalizer2(options).isNormalized(str);
+    }
+
+    public static boolean isNormalized(String str, Normalizer.Form form) {
+        return NormalizerBase.isNormalized(str, toMode(form), UNICODE_LATEST);
+    }
+
+    public static boolean isNormalized(String str, Normalizer.Form form, int options) {
+        return NormalizerBase.isNormalized(str, toMode(form), options);
+    }
+
+    //-------------------------------------------------------------------------
+    // Iteration API
+    //-------------------------------------------------------------------------
+
+    /**
+     * Return the current character in the normalized text.
+     * @return The codepoint as an int
+     * @stable ICU 2.8
+     */
+    public int current() {
+        if(bufferPos<buffer.length() || nextNormalize()) {
+            return buffer.codePointAt(bufferPos);
+        } else {
+            return DONE;
+        }
+    }
+
+    /**
+     * Return the next character in the normalized text and advance
+     * the iteration position by one.  If the end
+     * of the text has already been reached, {@link #DONE} is returned.
+     * @return The codepoint as an int
+     * @stable ICU 2.8
+     */
+    public int next() {
+        if(bufferPos<buffer.length() ||  nextNormalize()) {
+            int c=buffer.codePointAt(bufferPos);
+            bufferPos+=Character.charCount(c);
+            return c;
+        } else {
+            return DONE;
+        }
+    }
+
+    /**
+     * Return the previous character in the normalized text and decrement
+     * the iteration position by one.  If the beginning
+     * of the text has already been reached, {@link #DONE} is returned.
+     * @return The codepoint as an int
+     * @stable ICU 2.8
+     */
+    public int previous() {
+        if(bufferPos>0 || previousNormalize()) {
+            int c=buffer.codePointBefore(bufferPos);
+            bufferPos-=Character.charCount(c);
+            return c;
+        } else {
+            return DONE;
+        }
+    }
+
+    /**
+     * Reset the index to the beginning of the text.
+     * This is equivalent to setIndexOnly(startIndex)).
+     * @stable ICU 2.8
+     */
+    public void reset() {
+        text.setIndex(0);
+        currentIndex=nextIndex=0;
+        clearBuffer();
+    }
+
+    /**
+     * Set the iteration position in the input text that is being normalized,
+     * without any immediate normalization.
+     * After setIndexOnly(), getIndex() will return the same index that is
+     * specified here.
+     *
+     * @param index the desired index in the input text.
+     * @stable ICU 2.8
+     */
+    public void setIndexOnly(int index) {
+        text.setIndex(index);  // validates index
+        currentIndex=nextIndex=index;
+        clearBuffer();
+    }
+
+    /**
+     * Set the iteration position in the input text that is being normalized
+     * and return the first normalized character at that position.
+     * <p>
+     * <b>Note:</b> This method sets the position in the <em>input</em> text,
+     * while {@link #next} and {@link #previous} iterate through characters
+     * in the normalized <em>output</em>.  This means that there is not
+     * necessarily a one-to-one correspondence between characters returned
+     * by {@code next} and {@code previous} and the indices passed to and
+     * returned from {@code setIndex} and {@link #getIndex}.
+     * <p>
+     * @param index the desired index in the input text.
+     *
+     * @return   the first normalized character that is the result of iterating
+     *            forward starting at the given index.
+     *
+     * @throws IllegalArgumentException if the given index is less than
+     *          {@link #getBeginIndex} or greater than {@link #getEndIndex}.
+     * deprecated ICU 3.2
+     * @obsolete ICU 3.2
+     */
+     public int setIndex(int index) {
+         setIndexOnly(index);
+         return current();
+     }
+
+    /**
+     * Retrieve the index of the start of the input text. This is the begin
+     * index of the {@code CharacterIterator} or the start (i.e. 0) of the
+     * {@code String} over which this {@code NormalizerBase} is iterating
+     * @deprecated ICU 2.2. Use startIndex() instead.
+     * @return The codepoint as an int
+     * @see #startIndex
+     */
+    @Deprecated
+    public int getBeginIndex() {
+        return 0;
+    }
+
+    /**
+     * Retrieve the index of the end of the input text.  This is the end index
+     * of the {@code CharacterIterator} or the length of the {@code String}
+     * over which this {@code NormalizerBase} is iterating
+     * @deprecated ICU 2.2. Use endIndex() instead.
+     * @return The codepoint as an int
+     * @see #endIndex
+     */
+    @Deprecated
+    public int getEndIndex() {
+        return endIndex();
+    }
+
+    /**
+     * Retrieve the current iteration position in the input text that is
+     * being normalized.  This method is useful in applications such as
+     * searching, where you need to be able to determine the position in
+     * the input text that corresponds to a given normalized output character.
+     * <p>
+     * <b>Note:</b> This method sets the position in the <em>input</em>, while
+     * {@link #next} and {@link #previous} iterate through characters in the
+     * <em>output</em>.  This means that there is not necessarily a one-to-one
+     * correspondence between characters returned by {@code next} and
+     * {@code previous} and the indices passed to and returned from
+     * {@code setIndex} and {@link #getIndex}.
+     * @return The current iteration position
+     * @stable ICU 2.8
+     */
+    public int getIndex() {
+        if(bufferPos<buffer.length()) {
+            return currentIndex;
+        } else {
+            return nextIndex;
+        }
+    }
+
+    /**
+     * Retrieve the index of the end of the input text.  This is the end index
+     * of the {@code CharacterIterator} or the length of the {@code String}
+     * over which this {@code NormalizerBase} is iterating
+     * @return The current iteration position
+     * @stable ICU 2.8
+     */
+    public int endIndex() {
+        return text.getLength();
+    }
+
+    //-------------------------------------------------------------------------
+    // Iterator attributes
+    //-------------------------------------------------------------------------
+    /**
+     * Set the normalization mode for this object.
+     * <p>
+     * <b>Note:</b>If the normalization mode is changed while iterating
+     * over a string, calls to {@link #next} and {@link #previous} may
+     * return previously buffers characters in the old normalization mode
+     * until the iteration is able to re-sync at the next base character.
+     * It is safest to call {@link #setText setText()}, {@link #first},
+     * {@link #last}, etc. after calling {@code setMode}.
+     * <p>
+     * @param newMode the new mode for this {@code NormalizerBase}.
+     * The supported modes are:
+     * <ul>
+     *  <li>{@link #NFC}    - Unicode canonical decompositiion
+     *                        followed by canonical composition.
+     *  <li>{@link #NFKC}   - Unicode compatibility decompositiion
+     *                        follwed by canonical composition.
+     *  <li>{@link #NFD}    - Unicode canonical decomposition
+     *  <li>{@link #NFKD}   - Unicode compatibility decomposition.
+     *  <li>{@link #NONE}   - Do nothing but return characters
+     *                        from the underlying input text.
+     * </ul>
+     *
+     * @see #getMode
+     * @stable ICU 2.8
+     */
+    public void setMode(Mode newMode) {
+        mode = newMode;
+        norm2 = mode.getNormalizer2(options);
+    }
+
+    /**
+     * Return the basic operation performed by this {@code NormalizerBase}
+     *
+     * @see #setMode
+     * @stable ICU 2.8
+     */
+    public Mode getMode() {
+        return mode;
+    }
+
+    /**
+     * Set the input text over which this {@code NormalizerBase} will iterate.
+     * The iteration position is set to the beginning of the input text.
+     * @param newText   The new string to be normalized.
+     * @stable ICU 2.8
+     */
+    public void setText(String newText) {
+        UCharacterIterator newIter = UCharacterIterator.getInstance(newText);
+        if (newIter == null) {
+            throw new IllegalStateException("Could not create a new UCharacterIterator");
+        }
+        text = newIter;
+        reset();
+    }
+
+    /**
+     * Set the input text over which this {@code NormalizerBase} will iterate.
+     * The iteration position is set to the beginning of the input text.
+     * @param newText   The new string to be normalized.
+     * @stable ICU 2.8
+     */
+    public void setText(CharacterIterator newText) {
+        UCharacterIterator newIter = UCharacterIterator.getInstance(newText);
+        if (newIter == null) {
+            throw new IllegalStateException("Could not create a new UCharacterIterator");
+        }
+        text = newIter;
+        currentIndex=nextIndex=0;
+        clearBuffer();
+    }
+
+    private void clearBuffer() {
+        buffer.setLength(0);
+        bufferPos=0;
+    }
+
+    private boolean nextNormalize() {
+        clearBuffer();
+        currentIndex=nextIndex;
+        text.setIndex(nextIndex);
+        // Skip at least one character so we make progress.
+        int c=text.nextCodePoint();
+        if(c<0) {
+            return false;
+        }
+        StringBuilder segment=new StringBuilder().appendCodePoint(c);
+        while((c=text.nextCodePoint())>=0) {
+            if(norm2.hasBoundaryBefore(c)) {
+                text.moveCodePointIndex(-1);
+                break;
+            }
+            segment.appendCodePoint(c);
+        }
+        nextIndex=text.getIndex();
+        norm2.normalize(segment, buffer);
+        return buffer.length()!=0;
+    }
+
+    private boolean previousNormalize() {
+        clearBuffer();
+        nextIndex=currentIndex;
+        text.setIndex(currentIndex);
+        StringBuilder segment=new StringBuilder();
+        int c;
+        while((c=text.previousCodePoint())>=0) {
+            if(c<=0xffff) {
+                segment.insert(0, (char)c);
+            } else {
+                segment.insert(0, Character.toChars(c));
+            }
+            if(norm2.hasBoundaryBefore(c)) {
+                break;
+            }
+        }
+        currentIndex=text.getIndex();
+        norm2.normalize(segment, buffer);
+        bufferPos=buffer.length();
+        return buffer.length()!=0;
+    }
+
+}
diff --git a/tests/test_data/std/jdk/internal/icu/text/Replaceable.class b/tests/test_data/std/jdk/internal/icu/text/Replaceable.class
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diff --git a/tests/test_data/std/jdk/internal/icu/text/Replaceable.java b/tests/test_data/std/jdk/internal/icu/text/Replaceable.java
new file mode 100644
index 00000000..cf55270a
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/icu/text/Replaceable.java
@@ -0,0 +1,121 @@
+/*
+ * Copyright (c) 2005, 2020, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/*
+ *******************************************************************************
+ * (C) Copyright IBM Corp. 1996-2005 - All Rights Reserved                     *
+ *                                                                             *
+ * The original version of this source code and documentation is copyrighted   *
+ * and owned by IBM, These materials are provided under terms of a License     *
+ * Agreement between IBM and Sun. This technology is protected by multiple     *
+ * US and International patents. This notice and attribution to IBM may not    *
+ * to removed.                                                                 *
+ *******************************************************************************
+ */
+
+package jdk.internal.icu.text;
+
+/**
+ * <code>Replaceable</code> is an interface representing a
+ * string of characters that supports the replacement of a range of
+ * itself with a new string of characters.  It is used by APIs that
+ * change a piece of text while retaining metadata.  Metadata is data
+ * other than the Unicode characters returned by char32At().  One
+ * example of metadata is style attributes; another is an edit
+ * history, marking each character with an author and revision number.
+ *
+ * <p>An implicit aspect of the <code>Replaceable</code> API is that
+ * during a replace operation, new characters take on the metadata of
+ * the old characters.  For example, if the string "the <b>bold</b>
+ * font" has range (4, 8) replaced with "strong", then it becomes "the
+ * <b>strong</b> font".
+ *
+ * <p><code>Replaceable</code> specifies ranges using a start
+ * offset and a limit offset.  The range of characters thus specified
+ * includes the characters at offset start..limit-1.  That is, the
+ * start offset is inclusive, and the limit offset is exclusive.
+ *
+ * <p><code>Replaceable</code> also includes API to access characters
+ * in the string: <code>length()</code>, <code>charAt()</code>,
+ * <code>char32At()</code>, and <code>extractBetween()</code>.
+ *
+ * <p>For a subclass to support metadata, typical behavior of
+ * <code>replace()</code> is the following:
+ * <ul>
+ *   <li>Set the metadata of the new text to the metadata of the first
+ *   character replaced</li>
+ *   <li>If no characters are replaced, use the metadata of the
+ *   previous character</li>
+ *   <li>If there is no previous character (i.e. start == 0), use the
+ *   following character</li>
+ *   <li>If there is no following character (i.e. the replaceable was
+ *   empty), use default metadata</li>
+ *   <li>If the code point U+FFFF is seen, it should be interpreted as
+ *   a special marker having no metadata</li>
+ * </ul>
+ * If this is not the behavior, the subclass should document any differences.
+ *
+ * <p>Copyright &copy; IBM Corporation 1999.  All rights reserved.
+ *
+ * @author Alan Liu
+ * @stable ICU 2.0
+ */
+public interface Replaceable {
+    /**
+     * Returns the number of 16-bit code units in the text.
+     * @return number of 16-bit code units in text
+     * @stable ICU 2.0
+     */
+    int length();
+
+    /**
+     * Returns the 16-bit code unit at the given offset into the text.
+     * @param offset an integer between 0 and <code>length()</code>-1
+     * inclusive
+     * @return 16-bit code unit of text at given offset
+     * @stable ICU 2.0
+     */
+    char charAt(int offset);
+
+    /**
+     * Copies characters from this object into the destination
+     * character array.  The first character to be copied is at index
+     * <code>srcStart</code>; the last character to be copied is at
+     * index <code>srcLimit-1</code> (thus the total number of
+     * characters to be copied is <code>srcLimit-srcStart</code>). The
+     * characters are copied into the subarray of <code>dst</code>
+     * starting at index <code>dstStart</code> and ending at index
+     * <code>dstStart + (srcLimit-srcStart) - 1</code>.
+     *
+     * @param srcStart the beginning index to copy, inclusive;
+     *        {@code 0 <= start <= limit}.
+     * @param srcLimit the ending index to copy, exclusive;
+     *        {@code start <= limit <= length()}.
+     * @param dst the destination array.
+     * @param dstStart the start offset in the destination array.
+     * @stable ICU 2.0
+     */
+    void getChars(int srcStart, int srcLimit, char dst[], int dstStart);
+}
diff --git a/tests/test_data/std/jdk/internal/icu/text/ReplaceableString.class b/tests/test_data/std/jdk/internal/icu/text/ReplaceableString.class
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/icu/text/ReplaceableString.java b/tests/test_data/std/jdk/internal/icu/text/ReplaceableString.java
new file mode 100644
index 00000000..59d7144e
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/icu/text/ReplaceableString.java
@@ -0,0 +1,118 @@
+/*
+ * Copyright (c) 2005, 2020, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/*
+ *******************************************************************************
+ * Copyright (C) 1996-2009, International Business Machines Corporation and    *
+ * others. All Rights Reserved.                                                *
+ *******************************************************************************
+ */
+
+package jdk.internal.icu.text;
+
+/**
+ * <code>ReplaceableString</code> is an adapter class that implements the
+ * <code>Replaceable</code> API around an ordinary <code>StringBuffer</code>.
+ *
+ * <p><em>Note:</em> This class does not support attributes and is not
+ * intended for general use.  Most clients will need to implement
+ * {@link Replaceable} in their text representation class.
+ *
+ * <p>Copyright &copy; IBM Corporation 1999.  All rights reserved.
+ *
+ * @see Replaceable
+ * @author Alan Liu
+ * @stable ICU 2.0
+ */
+public class ReplaceableString implements Replaceable {
+
+    private StringBuffer buf;
+
+    /**
+     * Construct a new object with the given initial contents.
+     * @param str initial contents
+     * @stable ICU 2.0
+     */
+    public ReplaceableString(String str) {
+        buf = new StringBuffer(str);
+    }
+
+    /**
+     * Construct a new object using <code>buf</code> for internal
+     * storage.  The contents of <code>buf</code> at the time of
+     * construction are used as the initial contents.  <em>Note!
+     * Modifications to <code>buf</code> will modify this object, and
+     * vice versa.</em>
+     * @param buf object to be used as internal storage
+     * @stable ICU 2.0
+     */
+    public ReplaceableString(StringBuffer buf) {
+        this.buf = buf;
+    }
+
+    /**
+     * Return the number of characters contained in this object.
+     * <code>Replaceable</code> API.
+     * @stable ICU 2.0
+     */
+    public int length() {
+        return buf.length();
+    }
+
+    /**
+     * Return the character at the given position in this object.
+     * <code>Replaceable</code> API.
+     * @param offset offset into the contents, from 0 to
+     * <code>length()</code> - 1
+     * @stable ICU 2.0
+     */
+    public char charAt(int offset) {
+        return buf.charAt(offset);
+    }
+
+    /**
+     * Copies characters from this object into the destination
+     * character array.  The first character to be copied is at index
+     * <code>srcStart</code>; the last character to be copied is at
+     * index <code>srcLimit-1</code> (thus the total number of
+     * characters to be copied is <code>srcLimit-srcStart</code>). The
+     * characters are copied into the subarray of <code>dst</code>
+     * starting at index <code>dstStart</code> and ending at index
+     * <code>dstStart + (srcLimit-srcStart) - 1</code>.
+     *
+     * @param srcStart the beginning index to copy, inclusive;
+     *        {@code 0 <= start <= limit}.
+     * @param srcLimit the ending index to copy, exclusive;
+     *        {@code start <= limit <= length()}.
+     * @param dst the destination array.
+     * @param dstStart the start offset in the destination array.
+     * @stable ICU 2.0
+     */
+    public void getChars(int srcStart, int srcLimit, char dst[], int dstStart) {
+        if (srcStart != srcLimit) {
+            buf.getChars(srcStart, srcLimit, dst, dstStart);
+        }
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/icu/text/StringPrep$StringPrepTrieImpl.class b/tests/test_data/std/jdk/internal/icu/text/StringPrep$StringPrepTrieImpl.class
new file mode 100644
index 0000000000000000000000000000000000000000..c6edc906b31b829b91632037743fbcd25d948ca8
GIT binary patch
literal 732
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/icu/text/StringPrep$Values.class b/tests/test_data/std/jdk/internal/icu/text/StringPrep$Values.class
new file mode 100644
index 0000000000000000000000000000000000000000..4c536e77dc44c17261dd6ec302e16635f2009222
GIT binary patch
literal 589
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/icu/text/StringPrep.class b/tests/test_data/std/jdk/internal/icu/text/StringPrep.class
new file mode 100644
index 0000000000000000000000000000000000000000..48a9a669c7eb66b7b715b2dd46b8730addd873be
GIT binary patch
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HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/icu/text/StringPrep.java b/tests/test_data/std/jdk/internal/icu/text/StringPrep.java
new file mode 100644
index 00000000..f05d0403
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/icu/text/StringPrep.java
@@ -0,0 +1,485 @@
+/*
+ * Copyright (c) 2005, 2022, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+/*
+/*
+ *******************************************************************************
+ * Copyright (C) 2003-2004, International Business Machines Corporation and         *
+ * others. All Rights Reserved.                                                *
+ *******************************************************************************
+ */
+//
+// CHANGELOG
+//      2005-05-19 Edward Wang
+//          - copy this file from icu4jsrc_3_2/src/com/ibm/icu/text/StringPrep.java
+//          - move from package com.ibm.icu.text to package sun.net.idn
+//          - use ParseException instead of StringPrepParseException
+//          - change 'Normalizer.getUnicodeVersion()' to 'NormalizerImpl.getUnicodeVersion()'
+//          - remove all @deprecated tag to make compiler happy
+//      2007-08-14 Martin Buchholz
+//          - remove redundant casts
+//
+package jdk.internal.icu.text;
+
+import java.io.BufferedInputStream;
+import java.io.ByteArrayInputStream;
+import java.io.IOException;
+import java.io.InputStream;
+import java.text.ParseException;
+
+import sun.text.Normalizer;
+import jdk.internal.icu.impl.CharTrie;
+import jdk.internal.icu.impl.StringPrepDataReader;
+import jdk.internal.icu.impl.Trie;
+import jdk.internal.icu.lang.UCharacter;
+import jdk.internal.icu.lang.UCharacterDirection;
+import jdk.internal.icu.util.VersionInfo;
+
+/**
+ * StringPrep API implements the StingPrep framework as described by
+ * <a href="http://www.ietf.org/rfc/rfc3454.txt">RFC 3454</a>.
+ * StringPrep prepares Unicode strings for use in network protocols.
+ * Profiles of StingPrep are set of rules and data according to which the
+ * Unicode Strings are prepared. Each profiles contains tables which describe
+ * how a code point should be treated. The tables are broadly classied into
+ * <ul>
+ *     <li> Unassigned Table: Contains code points that are unassigned
+ *          in the Unicode Version supported by StringPrep. Currently
+ *          RFC 3454 supports Unicode 3.2. </li>
+ *     <li> Prohibited Table: Contains code points that are prohibited from
+ *          the output of the StringPrep processing function. </li>
+ *     <li> Mapping Table: Contains code points that are deleted from the output or case mapped. </li>
+ * </ul>
+ *
+ * The procedure for preparing Unicode strings:
+ * <ol>
+ *      <li> Map: For each character in the input, check if it has a mapping
+ *           and, if so, replace it with its mapping. </li>
+ *      <li> Normalize: Possibly normalize the result of step 1 using Unicode
+ *           normalization. </li>
+ *      <li> Prohibit: Check for any characters that are not allowed in the
+ *           output.  If any are found, return an error.</li>
+ *      <li> Check bidi: Possibly check for right-to-left characters, and if
+ *           any are found, make sure that the whole string satisfies the
+ *           requirements for bidirectional strings.  If the string does not
+ *           satisfy the requirements for bidirectional strings, return an
+ *           error.  </li>
+ * </ol>
+ * @author Ram Viswanadha
+ * @draft ICU 2.8
+ */
+public final class StringPrep {
+    /**
+     * Option to prohibit processing of unassigned code points in the input
+     *
+     * @see   #prepare
+     * @draft ICU 2.8
+     */
+    public static final int DEFAULT = 0x0000;
+
+    /**
+     * Option to allow processing of unassigned code points in the input
+     *
+     * @see   #prepare
+     * @draft ICU 2.8
+     */
+    public static final int ALLOW_UNASSIGNED = 0x0001;
+
+    private static final int UNASSIGNED        = 0x0000;
+    private static final int MAP               = 0x0001;
+    private static final int PROHIBITED        = 0x0002;
+    private static final int DELETE            = 0x0003;
+    private static final int TYPE_LIMIT        = 0x0004;
+
+    private static final int NORMALIZATION_ON  = 0x0001;
+    private static final int CHECK_BIDI_ON     = 0x0002;
+
+    private static final int TYPE_THRESHOLD       = 0xFFF0;
+    private static final int MAX_INDEX_VALUE      = 0x3FBF;   /*16139*/
+    private static final int MAX_INDEX_TOP_LENGTH = 0x0003;
+
+    /* indexes[] value names */
+    private static final int INDEX_TRIE_SIZE                  =  0; /* number of bytes in normalization trie */
+    private static final int INDEX_MAPPING_DATA_SIZE          =  1; /* The array that contains the mapping   */
+    private static final int NORM_CORRECTNS_LAST_UNI_VERSION  =  2; /* The index of Unicode version of last entry in NormalizationCorrections.txt */
+    private static final int ONE_UCHAR_MAPPING_INDEX_START    =  3; /* The starting index of 1 UChar mapping index in the mapping data array */
+    private static final int TWO_UCHARS_MAPPING_INDEX_START   =  4; /* The starting index of 2 UChars mapping index in the mapping data array */
+    private static final int THREE_UCHARS_MAPPING_INDEX_START =  5;
+    private static final int FOUR_UCHARS_MAPPING_INDEX_START  =  6;
+    private static final int OPTIONS                          =  7; /* Bit set of options to turn on in the profile */
+    private static final int INDEX_TOP                        = 16;                          /* changing this requires a new formatVersion */
+
+
+    /**
+     * Default buffer size of datafile
+     */
+    private static final int DATA_BUFFER_SIZE = 25000;
+
+    /* Wrappers for Trie implementations */
+    private static final class StringPrepTrieImpl implements Trie.DataManipulate{
+        private CharTrie sprepTrie = null;
+       /**
+        * Called by com.ibm.icu.util.Trie to extract from a lead surrogate's
+        * data the index array offset of the indexes for that lead surrogate.
+        * @param property data value for a surrogate from the trie, including
+        *        the folding offset
+        * @return data offset or 0 if there is no data for the lead surrogate
+        */
+         public int getFoldingOffset(int value){
+            return value;
+        }
+    }
+
+    // CharTrie implementation for reading the trie data
+    private StringPrepTrieImpl sprepTrieImpl;
+    // Indexes read from the data file
+    private int[] indexes;
+    // mapping data read from the data file
+    private char[] mappingData;
+    // format version of the data file
+    private byte[] formatVersion;
+    // the version of Unicode supported by the data file
+    private VersionInfo sprepUniVer;
+    // the Unicode version of last entry in the
+    // NormalizationCorrections.txt file if normalization
+    // is turned on
+    private VersionInfo normCorrVer;
+    // Option to turn on Normalization
+    private boolean doNFKC;
+    // Option to turn on checking for BiDi rules
+    private boolean checkBiDi;
+
+
+    private char getCodePointValue(int ch){
+        return sprepTrieImpl.sprepTrie.getCodePointValue(ch);
+    }
+
+    private static VersionInfo getVersionInfo(int comp){
+        int micro = comp & 0xFF;
+        int milli =(comp >> 8)  & 0xFF;
+        int minor =(comp >> 16) & 0xFF;
+        int major =(comp >> 24) & 0xFF;
+        return VersionInfo.getInstance(major,minor,milli,micro);
+    }
+    private static VersionInfo getVersionInfo(byte[] version){
+        if(version.length != 4){
+            return null;
+        }
+        return VersionInfo.getInstance((int)version[0],(int) version[1],(int) version[2],(int) version[3]);
+    }
+    /**
+     * Creates an StringPrep object after reading the input stream.
+     * The object does not hold a reference to the input steam, so the stream can be
+     * closed after the method returns.
+     *
+     * @param inputStream The stream for reading the StringPrep profile binarySun
+     * @throws IOException
+     * @draft ICU 2.8
+     */
+    public StringPrep(InputStream inputStream) throws IOException{
+
+        BufferedInputStream b = new BufferedInputStream(inputStream,DATA_BUFFER_SIZE);
+
+        StringPrepDataReader reader = new StringPrepDataReader(b);
+
+        // read the indexes
+        indexes = reader.readIndexes(INDEX_TOP);
+
+        byte[] sprepBytes = new byte[indexes[INDEX_TRIE_SIZE]];
+
+
+        //indexes[INDEX_MAPPING_DATA_SIZE] store the size of mappingData in bytes
+        mappingData = new char[indexes[INDEX_MAPPING_DATA_SIZE]/2];
+        // load the rest of the data and initialize the data members
+        reader.read(sprepBytes,mappingData);
+
+        sprepTrieImpl           = new StringPrepTrieImpl();
+        sprepTrieImpl.sprepTrie = new CharTrie( new ByteArrayInputStream(sprepBytes),sprepTrieImpl  );
+
+        // get the data format version
+        formatVersion = reader.getDataFormatVersion();
+
+        // get the options
+        doNFKC            = ((indexes[OPTIONS] & NORMALIZATION_ON) > 0);
+        checkBiDi         = ((indexes[OPTIONS] & CHECK_BIDI_ON) > 0);
+        sprepUniVer   = getVersionInfo(reader.getUnicodeVersion());
+        normCorrVer   = getVersionInfo(indexes[NORM_CORRECTNS_LAST_UNI_VERSION]);
+        VersionInfo normUniVer = UCharacter.getUnicodeVersion();
+        if(normUniVer.compareTo(sprepUniVer) < 0 && /* the Unicode version of SPREP file must be less than the Unicode Version of the normalization data */
+           normUniVer.compareTo(normCorrVer) < 0 && /* the Unicode version of the NormalizationCorrections.txt file should be less than the Unicode Version of the normalization data */
+           ((indexes[OPTIONS] & NORMALIZATION_ON) > 0) /* normalization turned on*/
+           ){
+            throw new IOException("Normalization Correction version not supported");
+        }
+        b.close();
+    }
+
+    private static final class Values{
+        boolean isIndex;
+        int value;
+        int type;
+        public void reset(){
+            isIndex = false;
+            value = 0;
+            type = -1;
+        }
+    }
+
+    private static final void getValues(char trieWord,Values values){
+        values.reset();
+        if(trieWord == 0){
+            /*
+             * Initial value stored in the mapping table
+             * just return TYPE_LIMIT .. so that
+             * the source codepoint is copied to the destination
+             */
+            values.type = TYPE_LIMIT;
+        }else if(trieWord >= TYPE_THRESHOLD){
+            values.type = (trieWord - TYPE_THRESHOLD);
+        }else{
+            /* get the type */
+            values.type = MAP;
+            /* ascertain if the value is index or delta */
+            if((trieWord & 0x02)>0){
+                values.isIndex = true;
+                values.value = trieWord  >> 2; //mask off the lower 2 bits and shift
+
+            }else{
+                values.isIndex = false;
+                values.value = (trieWord<<16)>>16;
+                values.value =  (values.value >> 2);
+
+            }
+
+            if((trieWord>>2) == MAX_INDEX_VALUE){
+                values.type = DELETE;
+                values.isIndex = false;
+                values.value = 0;
+            }
+        }
+    }
+
+
+
+    private StringBuffer map( UCharacterIterator iter, int options)
+                            throws ParseException {
+
+        Values val = new Values();
+        char result = 0;
+        int ch  = UCharacterIterator.DONE;
+        StringBuffer dest = new StringBuffer();
+        boolean allowUnassigned = ((options & ALLOW_UNASSIGNED)>0);
+
+        while((ch=iter.nextCodePoint())!= UCharacterIterator.DONE){
+
+            result = getCodePointValue(ch);
+            getValues(result,val);
+
+            // check if the source codepoint is unassigned
+            if(val.type == UNASSIGNED && allowUnassigned == false){
+                 throw new ParseException("An unassigned code point was found in the input " +
+                                          iter.getText(), iter.getIndex());
+            }else if((val.type == MAP)){
+                int index, length;
+
+                if(val.isIndex){
+                    index = val.value;
+                    if(index >= indexes[ONE_UCHAR_MAPPING_INDEX_START] &&
+                             index < indexes[TWO_UCHARS_MAPPING_INDEX_START]){
+                        length = 1;
+                    }else if(index >= indexes[TWO_UCHARS_MAPPING_INDEX_START] &&
+                             index < indexes[THREE_UCHARS_MAPPING_INDEX_START]){
+                        length = 2;
+                    }else if(index >= indexes[THREE_UCHARS_MAPPING_INDEX_START] &&
+                             index < indexes[FOUR_UCHARS_MAPPING_INDEX_START]){
+                        length = 3;
+                    }else{
+                        length = mappingData[index++];
+                    }
+                    /* copy mapping to destination */
+                    dest.append(mappingData,index,length);
+                    continue;
+
+                }else{
+                    ch -= val.value;
+                }
+            }else if(val.type == DELETE){
+                // just consume the codepoint and continue
+                continue;
+            }
+            //copy the source into destination
+            UTF16.append(dest,ch);
+        }
+
+        return dest;
+    }
+
+
+    private StringBuffer normalize(StringBuffer src){
+        /*
+         * Option UNORM_BEFORE_PRI_29:
+         *
+         * IDNA as interpreted by IETF members (see unicode mailing list 2004H1)
+         * requires strict adherence to Unicode 3.2 normalization,
+         * including buggy composition from before fixing Public Review Issue #29.
+         * Note that this results in some valid but nonsensical text to be
+         * either corrupted or rejected, depending on the text.
+         * See http://www.unicode.org/review/resolved-pri.html#pri29
+         * See unorm.cpp and cnormtst.c
+         */
+        return new StringBuffer(
+            Normalizer.normalize(
+                src.toString(),
+                java.text.Normalizer.Form.NFKC,
+                Normalizer.UNICODE_3_2));
+    }
+    /*
+    boolean isLabelSeparator(int ch){
+        int result = getCodePointValue(ch);
+        if( (result & 0x07)  == LABEL_SEPARATOR){
+            return true;
+        }
+        return false;
+    }
+    */
+     /*
+       1) Map -- For each character in the input, check if it has a mapping
+          and, if so, replace it with its mapping.
+
+       2) Normalize -- Possibly normalize the result of step 1 using Unicode
+          normalization.
+
+       3) Prohibit -- Check for any characters that are not allowed in the
+          output.  If any are found, return an error.
+
+       4) Check bidi -- Possibly check for right-to-left characters, and if
+          any are found, make sure that the whole string satisfies the
+          requirements for bidirectional strings.  If the string does not
+          satisfy the requirements for bidirectional strings, return an
+          error.
+          [Unicode3.2] defines several bidirectional categories; each character
+           has one bidirectional category assigned to it.  For the purposes of
+           the requirements below, an "RandALCat character" is a character that
+           has Unicode bidirectional categories "R" or "AL"; an "LCat character"
+           is a character that has Unicode bidirectional category "L".  Note
+
+
+           that there are many characters which fall in neither of the above
+           definitions; Latin digits (<U+0030> through <U+0039>) are examples of
+           this because they have bidirectional category "EN".
+
+           In any profile that specifies bidirectional character handling, all
+           three of the following requirements MUST be met:
+
+           1) The characters in section 5.8 MUST be prohibited.
+
+           2) If a string contains any RandALCat character, the string MUST NOT
+              contain any LCat character.
+
+           3) If a string contains any RandALCat character, a RandALCat
+              character MUST be the first character of the string, and a
+              RandALCat character MUST be the last character of the string.
+    */
+    /**
+     * Prepare the input buffer for use in applications with the given profile. This operation maps, normalizes(NFKC),
+     * checks for prohited and BiDi characters in the order defined by RFC 3454
+     * depending on the options specified in the profile.
+     *
+     * @param src           A UCharacterIterator object containing the source string
+     * @param options       A bit set of options:
+     *
+     *  - StringPrep.NONE               Prohibit processing of unassigned code points in the input
+     *
+     *  - StringPrep.ALLOW_UNASSIGNED   Treat the unassigned code points are in the input
+     *                                  as normal Unicode code points.
+     *
+     * @return StringBuffer A StringBuffer containing the output
+     * @throws ParseException
+     * @draft ICU 2.8
+     */
+    public StringBuffer prepare(UCharacterIterator src, int options)
+                        throws ParseException{
+
+        // map
+        StringBuffer mapOut = map(src,options);
+        StringBuffer normOut = mapOut;// initialize
+
+        if(doNFKC){
+            // normalize
+            normOut = normalize(mapOut);
+        }
+
+        int ch;
+        char result;
+        UCharacterIterator iter = UCharacterIterator.getInstance(normOut);
+        Values val = new Values();
+        int direction=UCharacterDirection.CHAR_DIRECTION_COUNT,
+            firstCharDir=UCharacterDirection.CHAR_DIRECTION_COUNT;
+        int rtlPos=-1, ltrPos=-1;
+        boolean rightToLeft=false, leftToRight=false;
+
+        while((ch=iter.nextCodePoint())!= UCharacterIterator.DONE){
+            result = getCodePointValue(ch);
+            getValues(result,val);
+
+            if(val.type == PROHIBITED ){
+                throw new ParseException("A prohibited code point was found in the input" +
+                                         iter.getText(), val.value);
+            }
+
+            direction = UCharacter.getDirection(ch);
+            if(firstCharDir == UCharacterDirection.CHAR_DIRECTION_COUNT){
+                firstCharDir = direction;
+            }
+            if(direction == UCharacterDirection.LEFT_TO_RIGHT){
+                leftToRight = true;
+                ltrPos = iter.getIndex()-1;
+            }
+            if(direction == UCharacterDirection.RIGHT_TO_LEFT || direction == UCharacterDirection.RIGHT_TO_LEFT_ARABIC){
+                rightToLeft = true;
+                rtlPos = iter.getIndex()-1;
+            }
+        }
+        if(checkBiDi == true){
+            // satisfy 2
+            if( leftToRight == true && rightToLeft == true){
+                throw new ParseException("The input does not conform to the rules for BiDi code points." +
+                                         iter.getText(),
+                                         (rtlPos>ltrPos) ? rtlPos : ltrPos);
+             }
+
+            //satisfy 3
+            if( rightToLeft == true &&
+                !((firstCharDir == UCharacterDirection.RIGHT_TO_LEFT || firstCharDir == UCharacterDirection.RIGHT_TO_LEFT_ARABIC) &&
+                (direction == UCharacterDirection.RIGHT_TO_LEFT || direction == UCharacterDirection.RIGHT_TO_LEFT_ARABIC))
+              ){
+                throw new ParseException("The input does not conform to the rules for BiDi code points." +
+                                         iter.getText(),
+                                         (rtlPos>ltrPos) ? rtlPos : ltrPos);
+            }
+        }
+        return normOut;
+
+      }
+}
diff --git a/tests/test_data/std/jdk/internal/icu/text/UCharacterIterator.class b/tests/test_data/std/jdk/internal/icu/text/UCharacterIterator.class
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diff --git a/tests/test_data/std/jdk/internal/icu/text/UCharacterIterator.java b/tests/test_data/std/jdk/internal/icu/text/UCharacterIterator.java
new file mode 100644
index 00000000..93978372
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/icu/text/UCharacterIterator.java
@@ -0,0 +1,317 @@
+/*
+ * Copyright (c) 2003, 2022, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/*
+ *******************************************************************************
+ * Copyright (C) 1996-2014, International Business Machines Corporation and    *
+ * others. All Rights Reserved.                                                *
+ *******************************************************************************
+ */
+
+package jdk.internal.icu.text;
+
+import jdk.internal.icu.impl.CharacterIteratorWrapper;
+import jdk.internal.icu.impl.ReplaceableUCharacterIterator;
+import jdk.internal.icu.impl.UCharacterProperty;
+
+import java.text.CharacterIterator;
+
+/**
+ * Abstract class that defines an API for iteration on text objects.This is an
+ * interface for forward and backward iteration and random access into a text
+ * object. Forward iteration is done with post-increment and backward iteration
+ * is done with pre-decrement semantics, while the
+ * <code>java.text.CharacterIterator</code> interface methods provided forward
+ * iteration with "pre-increment" and backward iteration with pre-decrement
+ * semantics. This API is more efficient for forward iteration over code points.
+ * The other major difference is that this API can do both code unit and code point
+ * iteration, <code>java.text.CharacterIterator</code> can only iterate over
+ * code units and is limited to BMP (0 - 0xFFFF)
+ * @author Ram
+ * @stable ICU 2.4
+ */
+public abstract class UCharacterIterator
+                      implements Cloneable {
+
+    /**
+     * Protected default constructor for the subclasses
+     * @stable ICU 2.4
+     */
+    protected UCharacterIterator(){
+    }
+
+    /**
+     * Indicator that we have reached the ends of the UTF16 text.
+     * Moved from UForwardCharacterIterator.java
+     * @stable ICU 2.4
+     */
+    public static final int DONE = -1;
+
+    // static final methods ----------------------------------------------------
+
+    /**
+     * Returns a <code>UCharacterIterator</code> object given a
+     * source string.
+     * @param source a string
+     * @return UCharacterIterator object
+     * @exception IllegalArgumentException if the argument is null
+     * @stable ICU 2.4
+     */
+    public static final UCharacterIterator getInstance(String source){
+        return new ReplaceableUCharacterIterator(source);
+    }
+
+    /**
+     * Returns a <code>UCharacterIterator</code> object given a
+     * source StringBuffer.
+     * @param source an string buffer of UTF-16 code units
+     * @return UCharacterIterator object
+     * @exception IllegalArgumentException if the argument is null
+     * @stable ICU 2.4
+     */
+    public static final UCharacterIterator getInstance(StringBuffer source){
+        return new ReplaceableUCharacterIterator(source);
+    }
+
+    /**
+     * Returns a <code>UCharacterIterator</code> object given a
+     * CharacterIterator.
+     * @param source a valid CharacterIterator object.
+     * @return UCharacterIterator object
+     * @exception IllegalArgumentException if the argument is null
+     * @stable ICU 2.4
+     */
+    public static final UCharacterIterator getInstance(CharacterIterator source){
+        return new CharacterIteratorWrapper(source);
+    }
+
+    // public methods ----------------------------------------------------------
+
+    /**
+     * Returns the length of the text
+     * @return length of the text
+     * @stable ICU 2.4
+     */
+    public abstract int getLength();
+
+    /**
+     * Gets the current index in text.
+     * @return current index in text.
+     * @stable ICU 2.4
+     */
+    public abstract int getIndex();
+
+    /**
+     * Returns the UTF16 code unit at index, and increments to the next
+     * code unit (post-increment semantics).  If index is out of
+     * range, DONE is returned, and the iterator is reset to the limit
+     * of the text.
+     * @return the next UTF16 code unit, or DONE if the index is at the limit
+     *         of the text.
+     * @stable ICU 2.4
+     */
+    public abstract int next();
+
+    /**
+     * Returns the code point at index, and increments to the next code
+     * point (post-increment semantics).  If index does not point to a
+     * valid surrogate pair, the behavior is the same as
+     * <code>next()</code>.  Otherwise the iterator is incremented past
+     * the surrogate pair, and the code point represented by the pair
+     * is returned.
+     * @return the next codepoint in text, or DONE if the index is at
+     *         the limit of the text.
+     * @stable ICU 2.4
+     */
+    public int nextCodePoint(){
+        int ch1 = next();
+        if(UTF16.isLeadSurrogate(ch1)){
+            int ch2 = next();
+            if(UTF16.isTrailSurrogate(ch2)){
+                return UCharacterProperty.getRawSupplementary((char)ch1,
+                                                              (char)ch2);
+            }else if (ch2 != DONE) {
+                // unmatched surrogate so back out
+                previous();
+            }
+        }
+        return ch1;
+    }
+
+    /**
+     * Decrement to the position of the previous code unit in the
+     * text, and return it (pre-decrement semantics).  If the
+     * resulting index is less than 0, the index is reset to 0 and
+     * DONE is returned.
+     * @return the previous code unit in the text, or DONE if the new
+     *         index is before the start of the text.
+     * @stable ICU 2.4
+     */
+    public abstract int previous();
+
+
+    /**
+     * Retreat to the start of the previous code point in the text,
+     * and return it (pre-decrement semantics).  If the index is not
+     * preceded by a valid surrogate pair, the behavior is the same
+     * as <code>previous()</code>.  Otherwise the iterator is
+     * decremented to the start of the surrogate pair, and the code
+     * point represented by the pair is returned.
+     * @return the previous code point in the text, or DONE if the new
+     *         index is before the start of the text.
+     * @stable ICU 2.4
+     */
+    public int previousCodePoint(){
+        int ch1 = previous();
+        if(UTF16.isTrailSurrogate(ch1)){
+            int ch2 = previous();
+            if(UTF16.isLeadSurrogate(ch2)){
+                return UCharacterProperty.getRawSupplementary((char)ch2,
+                                                              (char)ch1);
+            }else if (ch2 != DONE) {
+                //unmatched trail surrogate so back out
+                next();
+            }
+        }
+        return ch1;
+    }
+
+    /**
+     * Sets the index to the specified index in the text.
+     * @param index the index within the text.
+     * @exception IndexOutOfBoundsException is thrown if an invalid index is
+     *            supplied
+     * @stable ICU 2.4
+     */
+    public abstract void setIndex(int index);
+
+    /**
+     * Sets the current index to the start.
+     * @stable ICU 2.4
+     */
+    public void setToStart() {
+        setIndex(0);
+    }
+
+    /**
+     * Fills the buffer with the underlying text storage of the iterator
+     * If the buffer capacity is not enough a exception is thrown. The capacity
+     * of the fill in buffer should at least be equal to length of text in the
+     * iterator obtained by calling <code>getLength()</code>.
+     * <b>Usage:</b>
+     *
+     * <pre>{@code
+     *         UChacterIterator iter = new UCharacterIterator.getInstance(text);
+     *         char[] buf = new char[iter.getLength()];
+     *         iter.getText(buf);
+     *
+     *         OR
+     *         char[] buf= new char[1];
+     *         int len = 0;
+     *         for(;;){
+     *             try{
+     *                 len = iter.getText(buf);
+     *                 break;
+     *             }catch(IndexOutOfBoundsException e){
+     *                 buf = new char[iter.getLength()];
+     *             }
+     *         }
+     * }</pre>
+     *
+     * @param fillIn an array of chars to fill with the underlying UTF-16 code
+     *         units.
+     * @param offset the position within the array to start putting the data.
+     * @return the number of code units added to fillIn, as a convenience
+     * @exception IndexOutOfBoundsException exception if there is not enough
+     *            room after offset in the array, or if offset < 0.
+     * @stable ICU 2.4
+     */
+    public abstract int getText(char[] fillIn, int offset);
+
+    /**
+     * Convenience override for <code>getText(char[], int)</code> that provides
+     * an offset of 0.
+     * @param fillIn an array of chars to fill with the underlying UTF-16 code
+     *         units.
+     * @return the number of code units added to fillIn, as a convenience
+     * @exception IndexOutOfBoundsException exception if there is not enough
+     *            room in the array.
+     * @stable ICU 2.4
+     */
+    public final int getText(char[] fillIn) {
+        return getText(fillIn, 0);
+    }
+
+    /**
+     * Convenience method for returning the underlying text storage as a string
+     * @return the underlying text storage in the iterator as a string
+     * @stable ICU 2.4
+     */
+    public String getText() {
+        char[] text = new char[getLength()];
+        getText(text);
+        return new String(text);
+    }
+
+    /**
+     * Moves the current position by the number of code points
+     * specified, either forward or backward depending on the sign of
+     * delta (positive or negative respectively). If the current index
+     * is at a trail surrogate then the first adjustment is by code
+     * unit, and the remaining adjustments are by code points.  If the
+     * resulting index would be less than zero, the index is set to
+     * zero, and if the resulting index would be greater than limit,
+     * the index is set to limit.
+     * @param delta the number of code units to move the current index.
+     * @return the new index
+     * @exception IndexOutOfBoundsException is thrown if an invalid delta is
+     *            supplied
+     * @stable ICU 2.4
+     *
+     */
+    public int moveCodePointIndex(int delta){
+        if(delta>0){
+            while(delta>0 && nextCodePoint() != DONE){delta--;}
+        }else{
+            while(delta<0 && previousCodePoint() != DONE){delta++;}
+        }
+        if(delta!=0){
+            throw new IndexOutOfBoundsException();
+        }
+
+        return getIndex();
+    }
+
+    /**
+     * Creates a copy of this iterator, independent from other iterators.
+     * If it is not possible to clone the iterator, returns null.
+     * @return copy of this iterator
+     * @stable ICU 2.4
+     */
+    public Object clone() throws CloneNotSupportedException{
+        return super.clone();
+    }
+
+}
diff --git a/tests/test_data/std/jdk/internal/icu/text/UTF16.class b/tests/test_data/std/jdk/internal/icu/text/UTF16.class
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diff --git a/tests/test_data/std/jdk/internal/icu/text/UTF16.java b/tests/test_data/std/jdk/internal/icu/text/UTF16.java
new file mode 100644
index 00000000..e84e1d4c
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/icu/text/UTF16.java
@@ -0,0 +1,621 @@
+/*
+ * Copyright (c) 2005, 2022, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+/*
+ *******************************************************************************
+ * Copyright (C) 1996-2014, International Business Machines Corporation and
+ * others. All Rights Reserved.
+ *******************************************************************************
+ */
+
+package jdk.internal.icu.text;
+
+import jdk.internal.icu.impl.UCharacterProperty;
+
+/**
+ * <p>Standalone utility class providing UTF16 character conversions and
+ * indexing conversions.
+ * <p>Code that uses strings alone rarely need modification.
+ * By design, UTF-16 does not allow overlap, so searching for strings is a safe
+ * operation. Similarly, concatenation is always safe. Substringing is safe if
+ * the start and end are both on UTF-32 boundaries. In normal code, the values
+ * for start and end are on those boundaries, since they arose from operations
+ * like searching. If not, the nearest UTF-32 boundaries can be determined
+ * using <code>bounds()</code>.
+ * <strong>Examples:</strong>
+ * <p>The following examples illustrate use of some of these methods.
+ * <pre>{@code
+ * // iteration forwards: Original
+ * for (int i = 0; i < s.length(); ++i) {
+ *     char ch = s.charAt(i);
+ *     doSomethingWith(ch);
+ * }
+ *
+ * // iteration forwards: Changes for UTF-32
+ * int ch;
+ * for (int i = 0; i < s.length(); i += UTF16.getCharCount(ch)) {
+ *     ch = UTF16.charAt(s, i);
+ *     doSomethingWith(ch);
+ * }
+ *
+ * // iteration backwards: Original
+ * for (int i = s.length() - 1; i >= 0; --i) {
+ *     char ch = s.charAt(i);
+ *     doSomethingWith(ch);
+ * }
+ *
+ * // iteration backwards: Changes for UTF-32
+ * int ch;
+ * for (int i = s.length() - 1; i > 0; i -= UTF16.getCharCount(ch)) {
+ *     ch = UTF16.charAt(s, i);
+ *     doSomethingWith(ch);
+ * }
+ * }</pre>
+ * <strong>Notes:</strong>
+ * <ul>
+ *   <li>
+ *   <strong>Naming:</strong> For clarity, High and Low surrogates are called
+ *   <code>Lead</code> and <code>Trail</code> in the API, which gives a better
+ *   sense of their ordering in a string. <code>offset16</code> and
+ *   <code>offset32</code> are used to distinguish offsets to UTF-16
+ *   boundaries vs offsets to UTF-32 boundaries. <code>int char32</code> is
+ *   used to contain UTF-32 characters, as opposed to <code>char16</code>,
+ *   which is a UTF-16 code unit.
+ *   </li>
+ *   <li>
+ *   <strong>Roundtripping Offsets:</strong> You can always roundtrip from a
+ *   UTF-32 offset to a UTF-16 offset and back. Because of the difference in
+ *   structure, you can roundtrip from a UTF-16 offset to a UTF-32 offset and
+ *   back if and only if <code>bounds(string, offset16) != TRAIL</code>.
+ *   </li>
+ *   <li>
+ *   <strong>Exceptions:</strong> The error checking will throw an exception
+ *   if indices are out of bounds. Other than that, all methods will
+ *   behave reasonably, even if unmatched surrogates or out-of-bounds UTF-32
+ *   values are present. <code>UCharacter.isLegal()</code> can be used to check
+ *   for validity if desired.
+ *   </li>
+ *   <li>
+ *   <strong>Unmatched Surrogates:</strong> If the string contains unmatched
+ *   surrogates, then these are counted as one UTF-32 value. This matches
+ *   their iteration behavior, which is vital. It also matches common display
+ *   practice as missing glyphs (see the Unicode Standard Section 5.4, 5.5).
+ *   </li>
+ *   <li>
+ *   <strong>Optimization:</strong> The method implementations may need
+ *   optimization if the compiler doesn't fold static final methods. Since
+ *   surrogate pairs will form an exceeding small percentage of all the text
+ *   in the world, the singleton case should always be optimized for.
+ *   </li>
+ * </ul>
+ * @author Mark Davis, with help from Markus Scherer
+ * @stable ICU 2.1
+ */
+
+public final class UTF16
+{
+    // public variables ---------------------------------------------------
+
+    /**
+     * The lowest Unicode code point value.
+     * @stable ICU 2.1
+     */
+    public static final int CODEPOINT_MIN_VALUE = 0;
+    /**
+     * The highest Unicode code point value (scalar value) according to the
+     * Unicode Standard.
+     * @stable ICU 2.1
+     */
+    public static final int CODEPOINT_MAX_VALUE = 0x10ffff;
+    /**
+     * The minimum value for Supplementary code points
+     * @stable ICU 2.1
+     */
+    public static final int SUPPLEMENTARY_MIN_VALUE = 0x10000;
+    /**
+     * Lead surrogate minimum value
+     * @stable ICU 2.1
+     */
+    public static final int LEAD_SURROGATE_MIN_VALUE = 0xD800;
+    /**
+     * Trail surrogate minimum value
+     * @stable ICU 2.1
+     */
+    public static final int TRAIL_SURROGATE_MIN_VALUE = 0xDC00;
+    /**
+     * Lead surrogate maximum value
+     * @stable ICU 2.1
+     */
+    public static final int LEAD_SURROGATE_MAX_VALUE = 0xDBFF;
+    /**
+     * Trail surrogate maximum value
+     * @stable ICU 2.1
+     */
+    public static final int TRAIL_SURROGATE_MAX_VALUE = 0xDFFF;
+    /**
+     * Surrogate minimum value
+     * @stable ICU 2.1
+     */
+    public static final int SURROGATE_MIN_VALUE = LEAD_SURROGATE_MIN_VALUE;
+    /**
+     * Lead surrogate bitmask
+     */
+    private static final int LEAD_SURROGATE_BITMASK = 0xFFFFFC00;
+    /**
+     * Trail surrogate bitmask
+     */
+    private static final int TRAIL_SURROGATE_BITMASK = 0xFFFFFC00;
+    /**
+     * Surrogate bitmask
+     */
+    private static final int SURROGATE_BITMASK = 0xFFFFF800;
+    /**
+     * Lead surrogate bits
+     */
+    private static final int LEAD_SURROGATE_BITS = 0xD800;
+    /**
+     * Trail surrogate bits
+     */
+    private static final int TRAIL_SURROGATE_BITS = 0xDC00;
+    /**
+     * Surrogate bits
+     */
+    private static final int SURROGATE_BITS = 0xD800;
+
+    // constructor --------------------------------------------------------
+
+    // /CLOVER:OFF
+    /**
+     * Prevent instance from being created.
+     */
+    private UTF16() {
+    }
+
+    // /CLOVER:ON
+    // public method ------------------------------------------------------
+
+    /**
+     * Extract a single UTF-32 value from a string.
+     * Used when iterating forwards or backwards (with
+     * <code>UTF16.getCharCount()</code>, as well as random access. If a
+     * validity check is required, use
+     * <code><a href="../lang/UCharacter.html#isLegal(char)">
+     * UCharacter.isLegal()</a></code> on the return value.
+     * If the char retrieved is part of a surrogate pair, its supplementary
+     * character will be returned. If a complete supplementary character is
+     * not found the incomplete character will be returned
+     * @param source array of UTF-16 chars
+     * @param offset16 UTF-16 offset to the start of the character.
+     * @return UTF-32 value for the UTF-32 value that contains the char at
+     *         offset16. The boundaries of that codepoint are the same as in
+     *         <code>bounds32()</code>.
+     * @exception IndexOutOfBoundsException thrown if offset16 is out of
+     *            bounds.
+     * @stable ICU 2.1
+     */
+    public static int charAt(String source, int offset16) {
+        char single = source.charAt(offset16);
+        if (single < LEAD_SURROGATE_MIN_VALUE) {
+            return single;
+        }
+        return _charAt(source, offset16, single);
+    }
+
+    private static int _charAt(String source, int offset16, char single) {
+        if (single > TRAIL_SURROGATE_MAX_VALUE) {
+            return single;
+        }
+
+        // Convert the UTF-16 surrogate pair if necessary.
+        // For simplicity in usage, and because the frequency of pairs is
+        // low, look both directions.
+
+        if (single <= LEAD_SURROGATE_MAX_VALUE) {
+            ++offset16;
+            if (source.length() != offset16) {
+                char trail = source.charAt(offset16);
+                if (trail >= TRAIL_SURROGATE_MIN_VALUE && trail <= TRAIL_SURROGATE_MAX_VALUE) {
+                    return UCharacterProperty.getRawSupplementary(single, trail);
+                }
+            }
+        } else {
+            --offset16;
+            if (offset16 >= 0) {
+                // single is a trail surrogate so
+                char lead = source.charAt(offset16);
+                if (lead >= LEAD_SURROGATE_MIN_VALUE && lead <= LEAD_SURROGATE_MAX_VALUE) {
+                    return UCharacterProperty.getRawSupplementary(lead, single);
+                }
+            }
+        }
+        return single; // return unmatched surrogate
+    }
+
+    /**
+     * Extract a single UTF-32 value from a string.
+     * Used when iterating forwards or backwards (with
+     * <code>UTF16.getCharCount()</code>, as well as random access. If a
+     * validity check is required, use
+     * <code><a href="../lang/UCharacter.html#isLegal(char)">UCharacter.isLegal()
+     * </a></code> on the return value.
+     * If the char retrieved is part of a surrogate pair, its supplementary
+     * character will be returned. If a complete supplementary character is
+     * not found the incomplete character will be returned
+     * @param source array of UTF-16 chars
+     * @param offset16 UTF-16 offset to the start of the character.
+     * @return UTF-32 value for the UTF-32 value that contains the char at
+     *         offset16. The boundaries of that codepoint are the same as in
+     *         <code>bounds32()</code>.
+     * @exception IndexOutOfBoundsException thrown if offset16 is out of bounds.
+     * @stable ICU 2.1
+     */
+    public static int charAt(CharSequence source, int offset16) {
+        char single = source.charAt(offset16);
+        if (single < UTF16.LEAD_SURROGATE_MIN_VALUE) {
+            return single;
+        }
+        return _charAt(source, offset16, single);
+    }
+
+    private static int _charAt(CharSequence source, int offset16, char single) {
+        if (single > UTF16.TRAIL_SURROGATE_MAX_VALUE) {
+            return single;
+        }
+
+        // Convert the UTF-16 surrogate pair if necessary.
+        // For simplicity in usage, and because the frequency of pairs is
+        // low, look both directions.
+
+        if (single <= UTF16.LEAD_SURROGATE_MAX_VALUE) {
+            ++offset16;
+            if (source.length() != offset16) {
+                char trail = source.charAt(offset16);
+                if (trail >= UTF16.TRAIL_SURROGATE_MIN_VALUE
+                        && trail <= UTF16.TRAIL_SURROGATE_MAX_VALUE) {
+                    return UCharacterProperty.getRawSupplementary(single, trail);
+                }
+            }
+        } else {
+            --offset16;
+            if (offset16 >= 0) {
+                // single is a trail surrogate so
+                char lead = source.charAt(offset16);
+                if (lead >= UTF16.LEAD_SURROGATE_MIN_VALUE
+                        && lead <= UTF16.LEAD_SURROGATE_MAX_VALUE) {
+                    return UCharacterProperty.getRawSupplementary(lead, single);
+                }
+            }
+        }
+        return single; // return unmatched surrogate
+    }
+
+    /**
+     * Extract a single UTF-32 value from a substring. Used when iterating forwards or backwards
+     * (with <code>UTF16.getCharCount()</code>, as well as random access. If a validity check is
+     * required, use <code><a href="../lang/UCharacter.html#isLegal(char)">UCharacter.isLegal()
+     * </a></code>
+     * on the return value. If the char retrieved is part of a surrogate pair, its supplementary
+     * character will be returned. If a complete supplementary character is not found the incomplete
+     * character will be returned
+     *
+     * @param source Array of UTF-16 chars
+     * @param start Offset to substring in the source array for analyzing
+     * @param limit Offset to substring in the source array for analyzing
+     * @param offset16 UTF-16 offset relative to start
+     * @return UTF-32 value for the UTF-32 value that contains the char at offset16. The boundaries
+     *         of that codepoint are the same as in <code>bounds32()</code>.
+     * @exception IndexOutOfBoundsException Thrown if offset16 is not within the range of start and limit.
+     * @stable ICU 2.1
+     */
+    public static int charAt(char source[], int start, int limit, int offset16) {
+        offset16 += start;
+        if (offset16 < start || offset16 >= limit) {
+            throw new ArrayIndexOutOfBoundsException(offset16);
+        }
+
+        char single = source[offset16];
+        if (!isSurrogate(single)) {
+            return single;
+        }
+
+        // Convert the UTF-16 surrogate pair if necessary.
+        // For simplicity in usage, and because the frequency of pairs is
+        // low, look both directions.
+        if (single <= LEAD_SURROGATE_MAX_VALUE) {
+            offset16++;
+            if (offset16 >= limit) {
+                return single;
+            }
+            char trail = source[offset16];
+            if (isTrailSurrogate(trail)) {
+                return UCharacterProperty.getRawSupplementary(single, trail);
+            }
+        }
+        else { // isTrailSurrogate(single), so
+            if (offset16 == start) {
+                return single;
+            }
+            offset16--;
+            char lead = source[offset16];
+            if (isLeadSurrogate(lead))
+                return UCharacterProperty.getRawSupplementary(lead, single);
+        }
+        return single; // return unmatched surrogate
+    }
+
+    /**
+     * Determines how many chars this char32 requires.
+     * If a validity check is required, use <code>
+     * <a href="../lang/UCharacter.html#isLegal(char)">isLegal()</a></code> on
+     * char32 before calling.
+     * @param char32 the input codepoint.
+     * @return 2 if is in supplementary space, otherwise 1.
+     * @stable ICU 2.1
+     */
+    public static int getCharCount(int char32)
+    {
+        if (char32 < SUPPLEMENTARY_MIN_VALUE) {
+            return 1;
+        }
+        return 2;
+    }
+
+    /**
+     * Determines whether the code point is a surrogate.
+     *
+     * @param codePoint The input character.
+     *        (In ICU 2.1-69 the type of this parameter was <code>char</code>.)
+     * @return true If the input code point is a surrogate.
+     * @stable ICU 70
+     */
+    public static boolean isSurrogate(int codePoint) {
+        return (codePoint & SURROGATE_BITMASK) == SURROGATE_BITS;
+    }
+
+    /**
+     * Determines whether the code point is a trail surrogate.
+     *
+     * @param codePoint The input character.
+     *        (In ICU 2.1-69 the type of this parameter was <code>char</code>.)
+     * @return true If the input code point is a trail surrogate.
+     * @stable ICU 70
+     */
+    public static boolean isTrailSurrogate(int codePoint) {
+        return (codePoint & TRAIL_SURROGATE_BITMASK) == TRAIL_SURROGATE_BITS;
+    }
+
+    /**
+     * Determines whether the code point is a lead surrogate.
+     *
+     * @param codePoint The input character.
+     *        (In ICU 2.1-69 the type of this parameter was <code>char</code>.)
+     * @return true If the input code point is a lead surrogate
+     * @stable ICU 70
+     */
+    public static boolean isLeadSurrogate(int codePoint) {
+        return (codePoint & LEAD_SURROGATE_BITMASK) == LEAD_SURROGATE_BITS;
+    }
+
+    /**
+     * Returns the lead surrogate.
+     * If a validity check is required, use
+     * <code><a href="../lang/UCharacter.html#isLegal(char)">isLegal()</a></code>
+     * on char32 before calling.
+     * @param char32 the input character.
+     * @return lead surrogate if the getCharCount(ch) is 2; <br>
+     *         and 0 otherwise (note: 0 is not a valid lead surrogate).
+     * @stable ICU 2.1
+     */
+    public static char getLeadSurrogate(int char32)
+    {
+        if (char32 >= SUPPLEMENTARY_MIN_VALUE) {
+            return (char)(LEAD_SURROGATE_OFFSET_ +
+                          (char32 >> LEAD_SURROGATE_SHIFT_));
+        }
+
+        return 0;
+    }
+
+    /**
+     * Returns the trail surrogate.
+     * If a validity check is required, use
+     * <code><a href="../lang/UCharacter.html#isLegal(char)">isLegal()</a></code>
+     * on char32 before calling.
+     * @param char32 the input character.
+     * @return the trail surrogate if the getCharCount(ch) is 2; <br> otherwise
+     *         the character itself
+     * @stable ICU 2.1
+     */
+    public static char getTrailSurrogate(int char32)
+    {
+        if (char32 >= SUPPLEMENTARY_MIN_VALUE) {
+            return (char)(TRAIL_SURROGATE_MIN_VALUE +
+                          (char32 & TRAIL_SURROGATE_MASK_));
+        }
+
+        return (char) char32;
+    }
+
+    /**
+     * Convenience method corresponding to String.valueOf(char). Returns a one
+     * or two char string containing the UTF-32 value in UTF16 format. If a
+     * validity check is required, use
+     * <code><a href="../lang/UCharacter.html#isLegal(char)">isLegal()</a></code>
+     * on char32 before calling.
+     * @param char32 the input character.
+     * @return string value of char32 in UTF16 format
+     * @exception IllegalArgumentException thrown if char32 is a invalid
+     *            codepoint.
+     * @stable ICU 2.1
+     */
+    public static String valueOf(int char32)
+    {
+        if (char32 < CODEPOINT_MIN_VALUE || char32 > CODEPOINT_MAX_VALUE) {
+            throw new IllegalArgumentException("Illegal codepoint");
+        }
+        return toString(char32);
+    }
+
+    /**
+     * Append a single UTF-32 value to the end of a StringBuffer.
+     * If a validity check is required, use
+     * <code><a href="../lang/UCharacter.html#isLegal(char)">isLegal()</a></code>
+     * on char32 before calling.
+     * @param target the buffer to append to
+     * @param char32 value to append.
+     * @return the updated StringBuffer
+     * @exception IllegalArgumentException thrown when char32 does not lie
+     *            within the range of the Unicode codepoints
+     * @stable ICU 2.1
+     */
+    public static StringBuffer append(StringBuffer target, int char32)
+    {
+        // Check for irregular values
+        if (char32 < CODEPOINT_MIN_VALUE || char32 > CODEPOINT_MAX_VALUE) {
+            throw new IllegalArgumentException("Illegal codepoint: " + Integer.toHexString(char32));
+        }
+
+        // Write the UTF-16 values
+        if (char32 >= SUPPLEMENTARY_MIN_VALUE)
+            {
+            target.append(getLeadSurrogate(char32));
+            target.append(getTrailSurrogate(char32));
+        }
+        else {
+            target.append((char) char32);
+        }
+        return target;
+    }
+
+    /**
+     * Shifts offset16 by the argument number of codepoints within a subarray.
+     * @param source char array
+     * @param start position of the subarray to be performed on
+     * @param limit position of the subarray to be performed on
+     * @param offset16 UTF16 position to shift relative to start
+     * @param shift32 number of codepoints to shift
+     * @return new shifted offset16 relative to start
+     * @exception IndexOutOfBoundsException if the new offset16 is out of
+     *            bounds with respect to the subarray or the subarray bounds
+     *            are out of range.
+     * @stable ICU 2.1
+     */
+    public static int moveCodePointOffset(char source[], int start, int limit,
+                                          int offset16, int shift32)
+    {
+        int size = source.length;
+        int count;
+        char ch;
+        int result = offset16 + start;
+        if (start < 0 || limit < start) {
+            throw new StringIndexOutOfBoundsException(start);
+        }
+        if (limit > size) {
+            throw new StringIndexOutOfBoundsException(limit);
+        }
+        if (offset16 < 0 || result > limit) {
+            throw new StringIndexOutOfBoundsException(offset16);
+        }
+        if (shift32 > 0) {
+            if (shift32 + result > size) {
+                throw new StringIndexOutOfBoundsException(result);
+            }
+            count = shift32;
+            while (result < limit && count > 0)
+            {
+                ch = source[result];
+                if (isLeadSurrogate(ch) && (result + 1 < limit) &&
+                    isTrailSurrogate(source[result + 1])) {
+                    result++;
+                }
+                count--;
+                result++;
+            }
+        } else {
+            if (result + shift32 < start) {
+                throw new StringIndexOutOfBoundsException(result);
+            }
+            for (count = -shift32; count > 0; count--) {
+                result--;
+                if (result < start) {
+                    break;
+                }
+                ch = source[result];
+                if (isTrailSurrogate(ch) && result > start && isLeadSurrogate(source[result - 1])) {
+                    result--;
+                }
+            }
+        }
+        if (count != 0) {
+            throw new StringIndexOutOfBoundsException(shift32);
+        }
+        result -= start;
+        return result;
+    }
+
+    // private data members -------------------------------------------------
+
+    /**
+     * Shift value for lead surrogate to form a supplementary character.
+     */
+    private static final int LEAD_SURROGATE_SHIFT_ = 10;
+
+    /**
+     * Mask to retrieve the significant value from a trail surrogate.
+     */
+    private static final int TRAIL_SURROGATE_MASK_ = 0x3FF;
+
+    /**
+     * Value that all lead surrogate starts with
+     */
+    private static final int LEAD_SURROGATE_OFFSET_ =
+        LEAD_SURROGATE_MIN_VALUE -
+        (SUPPLEMENTARY_MIN_VALUE
+        >> LEAD_SURROGATE_SHIFT_);
+
+    // private methods ------------------------------------------------------
+
+    /**
+     * <p>Converts argument code point and returns a String object representing
+     * the code point's value in UTF16 format.
+     * <p>This method does not check for the validity of the codepoint, the
+     * results are not guaranteed if a invalid codepoint is passed as
+     * argument.
+     * <p>The result is a string whose length is 1 for non-supplementary code
+     * points, 2 otherwise.
+     * @param ch code point
+     * @return string representation of the code point
+     */
+    private static String toString(int ch)
+    {
+        if (ch < SUPPLEMENTARY_MIN_VALUE) {
+            return String.valueOf((char) ch);
+        }
+
+        StringBuilder result = new StringBuilder();
+        result.append(getLeadSurrogate(ch));
+        result.append(getTrailSurrogate(ch));
+        return result.toString();
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/icu/text/UnicodeSet$Filter.class b/tests/test_data/std/jdk/internal/icu/text/UnicodeSet$Filter.class
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index 0000000000000000000000000000000000000000..a420eda40a5cac39e3db7fbbfe8b5153c7f79600
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/icu/text/UnicodeSet.java b/tests/test_data/std/jdk/internal/icu/text/UnicodeSet.java
new file mode 100644
index 00000000..6f5919e0
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/icu/text/UnicodeSet.java
@@ -0,0 +1,1412 @@
+/*
+ * Copyright (c) 2005, 2022, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/*
+ *******************************************************************************
+ * Copyright (C) 1996-2015, International Business Machines Corporation and
+ * others. All Rights Reserved.
+ *******************************************************************************
+ */
+package jdk.internal.icu.text;
+
+import java.text.ParsePosition;
+import java.util.ArrayList;
+import java.util.TreeSet;
+
+import jdk.internal.icu.impl.BMPSet;
+import jdk.internal.icu.impl.UCharacterProperty;
+import jdk.internal.icu.impl.UnicodeSetStringSpan;
+import jdk.internal.icu.impl.Utility;
+import jdk.internal.icu.lang.UCharacter;
+import jdk.internal.icu.util.OutputInt;
+import jdk.internal.icu.util.VersionInfo;
+
+/**
+ * A mutable set of Unicode characters and multicharacter strings.
+ * Objects of this class represent <em>character classes</em> used
+ * in regular expressions. A character specifies a subset of Unicode
+ * code points.  Legal code points are U+0000 to U+10FFFF, inclusive.
+ *
+ * Note: method freeze() will not only make the set immutable, but
+ * also makes important methods much higher performance:
+ * contains(c), containsNone(...), span(...), spanBack(...) etc.
+ * After the object is frozen, any subsequent call that wants to change
+ * the object will throw UnsupportedOperationException.
+ *
+ * <p>The UnicodeSet class is not designed to be subclassed.
+ *
+ * <p><code>UnicodeSet</code> supports two APIs. The first is the
+ * <em>operand</em> API that allows the caller to modify the value of
+ * a <code>UnicodeSet</code> object. It conforms to Java 2's
+ * <code>java.util.Set</code> interface, although
+ * <code>UnicodeSet</code> does not actually implement that
+ * interface. All methods of <code>Set</code> are supported, with the
+ * modification that they take a character range or single character
+ * instead of an <code>Object</code>, and they take a
+ * <code>UnicodeSet</code> instead of a <code>Collection</code>.  The
+ * operand API may be thought of in terms of boolean logic: a boolean
+ * OR is implemented by <code>add</code>, a boolean AND is implemented
+ * by <code>retain</code>, a boolean XOR is implemented by
+ * <code>complement</code> taking an argument, and a boolean NOT is
+ * implemented by <code>complement</code> with no argument.  In terms
+ * of traditional set theory function names, <code>add</code> is a
+ * union, <code>retain</code> is an intersection, <code>remove</code>
+ * is an asymmetric difference, and <code>complement</code> with no
+ * argument is a set complement with respect to the superset range
+ * <code>MIN_VALUE-MAX_VALUE</code>
+ *
+ * <p>The second API is the
+ * <code>applyPattern()</code>/<code>toPattern()</code> API from the
+ * <code>java.text.Format</code>-derived classes.  Unlike the
+ * methods that add characters, add categories, and control the logic
+ * of the set, the method <code>applyPattern()</code> sets all
+ * attributes of a <code>UnicodeSet</code> at once, based on a
+ * string pattern.
+ *
+ * <p><b>Pattern syntax</b></p>
+ *
+ * Patterns are accepted by the constructors and the
+ * <code>applyPattern()</code> methods and returned by the
+ * <code>toPattern()</code> method.  These patterns follow a syntax
+ * similar to that employed by version 8 regular expression character
+ * classes.  Here are some simple examples:
+ *
+ * <blockquote>
+ *   <table>
+ *     <tr align="top">
+ *       <td nowrap valign="top" align="left"><code>[]</code></td>
+ *       <td valign="top">No characters</td>
+ *     </tr><tr align="top">
+ *       <td nowrap valign="top" align="left"><code>[a]</code></td>
+ *       <td valign="top">The character 'a'</td>
+ *     </tr><tr align="top">
+ *       <td nowrap valign="top" align="left"><code>[ae]</code></td>
+ *       <td valign="top">The characters 'a' and 'e'</td>
+ *     </tr>
+ *     <tr>
+ *       <td nowrap valign="top" align="left"><code>[a-e]</code></td>
+ *       <td valign="top">The characters 'a' through 'e' inclusive, in Unicode code
+ *       point order</td>
+ *     </tr>
+ *     <tr>
+ *       <td nowrap valign="top" align="left"><code>[\\u4E01]</code></td>
+ *       <td valign="top">The character U+4E01</td>
+ *     </tr>
+ *     <tr>
+ *       <td nowrap valign="top" align="left"><code>[a{ab}{ac}]</code></td>
+ *       <td valign="top">The character 'a' and the multicharacter strings "ab" and
+ *       "ac"</td>
+ *     </tr>
+ *     <tr>
+ *       <td nowrap valign="top" align="left"><code>[\p{Lu}]</code></td>
+ *       <td valign="top">All characters in the general category Uppercase Letter</td>
+ *     </tr>
+ *   </table>
+ * </blockquote>
+ *
+ * Any character may be preceded by a backslash in order to remove any special
+ * meaning.  White space characters, as defined by the Unicode Pattern_White_Space property, are
+ * ignored, unless they are escaped.
+ *
+ * <p>Property patterns specify a set of characters having a certain
+ * property as defined by the Unicode standard.  Both the POSIX-like
+ * "[:Lu:]" and the Perl-like syntax "\p{Lu}" are recognized.  For a
+ * complete list of supported property patterns, see the User's Guide
+ * for UnicodeSet at
+ * <a href="https://unicode-org.github.io/icu/userguide/strings/unicodeset">
+ * https://unicode-org.github.io/icu/userguide/strings/unicodeset</a>.
+ * Actual determination of property data is defined by the underlying
+ * Unicode database as implemented by UCharacter.
+ *
+ * <p>Patterns specify individual characters, ranges of characters, and
+ * Unicode property sets.  When elements are concatenated, they
+ * specify their union.  To complement a set, place a '^' immediately
+ * after the opening '['.  Property patterns are inverted by modifying
+ * their delimiters; "[:^foo]" and "\P{foo}".  In any other location,
+ * '^' has no special meaning.
+ *
+ * <p>Since ICU 70, "[^...]", "[:^foo]", "\P{foo}", and "[:binaryProperty=No:]"
+ * perform a "code point complement" (all code points minus the original set),
+ * removing all multicharacter strings,
+ * equivalent to .{@link #complement()}.{@link #removeAllStrings()} .
+ * The {@link #complement()} API function continues to perform a
+ * symmetric difference with all code points and thus retains all multicharacter strings.
+ *
+ * <p>Ranges are indicated by placing two a '-' between two
+ * characters, as in "a-z".  This specifies the range of all
+ * characters from the left to the right, in Unicode order.  If the
+ * left character is greater than or equal to the
+ * right character it is a syntax error.  If a '-' occurs as the first
+ * character after the opening '[' or '[^', or if it occurs as the
+ * last character before the closing ']', then it is taken as a
+ * literal.  Thus "[a\\-b]", "[-ab]", and "[ab-]" all indicate the same
+ * set of three characters, 'a', 'b', and '-'.
+ *
+ * <p>Sets may be intersected using the {@literal '&'} operator or the asymmetric
+ * set difference may be taken using the '-' operator, for example,
+ * "{@code [[:L:]&[\\u0000-\\u0FFF]]}" indicates the set of all Unicode letters
+ * with values less than 4096.  Operators ({@literal '&'} and '|') have equal
+ * precedence and bind left-to-right.  Thus
+ * "[[:L:]-[a-z]-[\\u0100-\\u01FF]]" is equivalent to
+ * "[[[:L:]-[a-z]]-[\\u0100-\\u01FF]]".  This only really matters for
+ * difference; intersection is commutative.
+ *
+ * <table>
+ * <tr valign=top><td nowrap><code>[a]</code><td>The set containing 'a'
+ * <tr valign=top><td nowrap><code>[a-z]</code><td>The set containing 'a'
+ * through 'z' and all letters in between, in Unicode order
+ * <tr valign=top><td nowrap><code>[^a-z]</code><td>The set containing
+ * all characters but 'a' through 'z',
+ * that is, U+0000 through 'a'-1 and 'z'+1 through U+10FFFF
+ * <tr valign=top><td nowrap><code>[[<em>pat1</em>][<em>pat2</em>]]</code>
+ * <td>The union of sets specified by <em>pat1</em> and <em>pat2</em>
+ * <tr valign=top><td nowrap><code>[[<em>pat1</em>]&amp;[<em>pat2</em>]]</code>
+ * <td>The intersection of sets specified by <em>pat1</em> and <em>pat2</em>
+ * <tr valign=top><td nowrap><code>[[<em>pat1</em>]-[<em>pat2</em>]]</code>
+ * <td>The asymmetric difference of sets specified by <em>pat1</em> and
+ * <em>pat2</em>
+ * <tr valign=top><td nowrap><code>[:Lu:] or \p{Lu}</code>
+ * <td>The set of characters having the specified
+ * Unicode property; in
+ * this case, Unicode uppercase letters
+ * <tr valign=top><td nowrap><code>[:^Lu:] or \P{Lu}</code>
+ * <td>The set of characters <em>not</em> having the given
+ * Unicode property
+ * </table>
+ *
+ * <p><b>Formal syntax</b></p>
+ *
+ * <blockquote>
+ *   <table>
+ *     <tr align="top">
+ *       <td nowrap valign="top" align="right"><code>pattern :=&nbsp; </code></td>
+ *       <td valign="top"><code>('[' '^'? item* ']') |
+ *       property</code></td>
+ *     </tr>
+ *     <tr align="top">
+ *       <td nowrap valign="top" align="right"><code>item :=&nbsp; </code></td>
+ *       <td valign="top"><code>char | (char '-' char) | pattern-expr<br>
+ *       </code></td>
+ *     </tr>
+ *     <tr align="top">
+ *       <td nowrap valign="top" align="right"><code>pattern-expr :=&nbsp; </code></td>
+ *       <td valign="top"><code>pattern | pattern-expr pattern |
+ *       pattern-expr op pattern<br>
+ *       </code></td>
+ *     </tr>
+ *     <tr align="top">
+ *       <td nowrap valign="top" align="right"><code>op :=&nbsp; </code></td>
+ *       <td valign="top"><code>'&amp;' | '-'<br>
+ *       </code></td>
+ *     </tr>
+ *     <tr align="top">
+ *       <td nowrap valign="top" align="right"><code>special :=&nbsp; </code></td>
+ *       <td valign="top"><code>'[' | ']' | '-'<br>
+ *       </code></td>
+ *     </tr>
+ *     <tr align="top">
+ *       <td nowrap valign="top" align="right"><code>char :=&nbsp; </code></td>
+ *       <td valign="top"><em>any character that is not</em><code> special<br>
+ *       | ('\\' </code><em>any character</em><code>)<br>
+ *       | ('&#92;u' hex hex hex hex)<br>
+ *       </code></td>
+ *     </tr>
+ *     <tr align="top">
+ *       <td nowrap valign="top" align="right"><code>hex :=&nbsp; </code></td>
+ *       <td style="vertical-align: top;"><code>'0' | '1' | '2' | '3' | '4' | '5' | '6' | '7' | '8' | '9' |<br>
+ *       &nbsp;&nbsp;&nbsp;&nbsp;'A' | 'B' | 'C' | 'D' | 'E' | 'F' | 'a' | 'b' | 'c' | 'd' | 'e' | 'f'</code></td>
+ *     </tr>
+ *     <tr>
+ *       <td nowrap valign="top" align="right"><code>property :=&nbsp; </code></td>
+ *       <td valign="top"><em>a Unicode property set pattern</em></td>
+ *     </tr>
+ *   </table>
+ *   <br>
+ *   <table border="1">
+ *     <tr>
+ *       <td>Legend: <table>
+ *         <tr>
+ *           <td nowrap valign="top"><code>a := b</code></td>
+ *           <td width="20" valign="top">&nbsp; </td>
+ *           <td valign="top"><code>a</code> may be replaced by <code>b</code> </td>
+ *         </tr>
+ *         <tr>
+ *           <td nowrap valign="top"><code>a?</code></td>
+ *           <td valign="top"></td>
+ *           <td valign="top">zero or one instance of <code>a</code><br>
+ *           </td>
+ *         </tr>
+ *         <tr>
+ *           <td nowrap valign="top"><code>a*</code></td>
+ *           <td valign="top"></td>
+ *           <td valign="top">one or more instances of <code>a</code><br>
+ *           </td>
+ *         </tr>
+ *         <tr>
+ *           <td nowrap valign="top"><code>a | b</code></td>
+ *           <td valign="top"></td>
+ *           <td valign="top">either <code>a</code> or <code>b</code><br>
+ *           </td>
+ *         </tr>
+ *         <tr>
+ *           <td nowrap valign="top"><code>'a'</code></td>
+ *           <td valign="top"></td>
+ *           <td valign="top">the literal string between the quotes </td>
+ *         </tr>
+ *       </table>
+ *       </td>
+ *     </tr>
+ *   </table>
+ * </blockquote>
+ * <p>To iterate over contents of UnicodeSet, the following are available:
+ * <ul><li>{@link #ranges()} to iterate through the ranges</li>
+ * <li>{@link #strings()} to iterate through the strings</li>
+ * <li>{@link #iterator()} to iterate through the entire contents in a single loop.
+ * That method is, however, not particularly efficient, since it "boxes" each code point into a String.
+ * </ul>
+ * All of the above can be used in <b>for</b> loops.
+ * The {@link com.ibm.icu.text.UnicodeSetIterator UnicodeSetIterator} can also be used, but not in <b>for</b> loops.
+ * <p>To replace, count elements, or delete spans, see {@link com.ibm.icu.text.UnicodeSetSpanner UnicodeSetSpanner}.
+ *
+ * @author Alan Liu
+ * @stable ICU 2.0
+ */
+public class UnicodeSet {
+
+    private static final int LOW = 0x000000; // LOW <= all valid values. ZERO for codepoints
+    private static final int HIGH = 0x110000; // HIGH > all valid values. 10000 for code units.
+    // 110000 for codepoints
+
+    /**
+     * Minimum value that can be stored in a UnicodeSet.
+     * @stable ICU 2.0
+     */
+    public static final int MIN_VALUE = LOW;
+
+    /**
+     * Maximum value that can be stored in a UnicodeSet.
+     * @stable ICU 2.0
+     */
+    public static final int MAX_VALUE = HIGH - 1;
+
+    private int len;      // length used; list may be longer to minimize reallocs
+    private int[] list;   // MUST be terminated with HIGH
+    private int[] rangeList; // internal buffer
+    private int[] buffer; // internal buffer
+
+    // NOTE: normally the field should be of type SortedSet; but that is missing a public clone!!
+    // is not private so that UnicodeSetIterator can get access
+    TreeSet<String> strings = new TreeSet<String>();
+
+    /**
+     * The pattern representation of this set.  This may not be the
+     * most economical pattern.  It is the pattern supplied to
+     * applyPattern(), with variables substituted and whitespace
+     * removed.  For sets constructed without applyPattern(), or
+     * modified using the non-pattern API, this string will be null,
+     * indicating that toPattern() must generate a pattern
+     * representation from the inversion list.
+     */
+
+    private static final int START_EXTRA = 16;         // initial storage. Must be >= 0
+    private static final int GROW_EXTRA = START_EXTRA; // extra amount for growth. Must be >= 0
+
+    private static UnicodeSet INCLUSION = null;
+
+    private volatile BMPSet bmpSet; // The set is frozen if bmpSet or stringSpan is not null.
+    private volatile UnicodeSetStringSpan stringSpan;
+
+    //----------------------------------------------------------------
+    // Public API
+    //----------------------------------------------------------------
+
+    /**
+     * Constructs an empty set.
+     * @stable ICU 2.0
+     */
+    private UnicodeSet() {
+        list = new int[1 + START_EXTRA];
+        list[len++] = HIGH;
+    }
+
+    /**
+     * Constructs a copy of an existing set.
+     * @stable ICU 2.0
+     */
+    private UnicodeSet(UnicodeSet other) {
+        set(other);
+    }
+
+    /**
+     * Constructs a set containing the given range. If <code>end >
+     * start</code> then an empty set is created.
+     *
+     * @param start first character, inclusive, of range
+     * @param end last character, inclusive, of range
+     * @stable ICU 2.0
+     */
+    public UnicodeSet(int start, int end) {
+        this();
+        complement(start, end);
+    }
+
+    /**
+     * Constructs a set from the given pattern.  See the class description
+     * for the syntax of the pattern language.  Whitespace is ignored.
+     * @param pattern a string specifying what characters are in the set
+     * @exception java.lang.IllegalArgumentException if the pattern contains
+     * a syntax error.
+     * @stable ICU 2.0
+     */
+    public UnicodeSet(String pattern) {
+        this();
+        applyPattern(pattern, null);
+    }
+
+    /**
+     * Make this object represent the same set as <code>other</code>.
+     * @param other a <code>UnicodeSet</code> whose value will be
+     * copied to this object
+     * @stable ICU 2.0
+     */
+    public UnicodeSet set(UnicodeSet other) {
+        checkFrozen();
+        list = other.list.clone();
+        len = other.len;
+        strings = new TreeSet<String>(other.strings);
+        return this;
+    }
+
+    /**
+     * Returns the number of elements in this set (its cardinality)
+     * Note than the elements of a set may include both individual
+     * codepoints and strings.
+     *
+     * @return the number of elements in this set (its cardinality).
+     * @stable ICU 2.0
+     */
+    public int size() {
+        int n = 0;
+        int count = getRangeCount();
+        for (int i = 0; i < count; ++i) {
+            n += getRangeEnd(i) - getRangeStart(i) + 1;
+        }
+        return n + strings.size();
+    }
+
+    // for internal use, after checkFrozen has been called
+    private UnicodeSet add_unchecked(int start, int end) {
+        if (start < MIN_VALUE || start > MAX_VALUE) {
+            throw new IllegalArgumentException("Invalid code point U+" + Utility.hex(start, 6));
+        }
+        if (end < MIN_VALUE || end > MAX_VALUE) {
+            throw new IllegalArgumentException("Invalid code point U+" + Utility.hex(end, 6));
+        }
+        if (start < end) {
+            add(range(start, end), 2, 0);
+        } else if (start == end) {
+            add(start);
+        }
+        return this;
+    }
+
+    /**
+     * Adds the specified character to this set if it is not already
+     * present.  If this set already contains the specified character,
+     * the call leaves this set unchanged.
+     * @stable ICU 2.0
+     */
+    public final UnicodeSet add(int c) {
+        checkFrozen();
+        return add_unchecked(c);
+    }
+
+    // for internal use only, after checkFrozen has been called
+    private final UnicodeSet add_unchecked(int c) {
+        if (c < MIN_VALUE || c > MAX_VALUE) {
+            throw new IllegalArgumentException("Invalid code point U+" + Utility.hex(c, 6));
+        }
+
+        // find smallest i such that c < list[i]
+        // if odd, then it is IN the set
+        // if even, then it is OUT of the set
+        int i = findCodePoint(c);
+
+        // already in set?
+        if ((i & 1) != 0) return this;
+
+        // HIGH is 0x110000
+        // assert(list[len-1] == HIGH);
+
+        // empty = [HIGH]
+        // [start_0, limit_0, start_1, limit_1, HIGH]
+
+        // [..., start_k-1, limit_k-1, start_k, limit_k, ..., HIGH]
+        //                             ^
+        //                             list[i]
+
+        // i == 0 means c is before the first range
+
+        if (c == list[i]-1) {
+            // c is before start of next range
+            list[i] = c;
+            // if we touched the HIGH mark, then add a new one
+            if (c == MAX_VALUE) {
+                ensureCapacity(len+1);
+                list[len++] = HIGH;
+            }
+            if (i > 0 && c == list[i-1]) {
+                // collapse adjacent ranges
+
+                // [..., start_k-1, c, c, limit_k, ..., HIGH]
+                //                     ^
+                //                     list[i]
+                System.arraycopy(list, i+1, list, i-1, len-i-1);
+                len -= 2;
+            }
+        }
+
+        else if (i > 0 && c == list[i-1]) {
+            // c is after end of prior range
+            list[i-1]++;
+            // no need to check for collapse here
+        }
+
+        else {
+            // At this point we know the new char is not adjacent to
+            // any existing ranges, and it is not 10FFFF.
+
+
+            // [..., start_k-1, limit_k-1, start_k, limit_k, ..., HIGH]
+            //                             ^
+            //                             list[i]
+
+            // [..., start_k-1, limit_k-1, c, c+1, start_k, limit_k, ..., HIGH]
+            //                             ^
+            //                             list[i]
+
+            // Don't use ensureCapacity() to save on copying.
+            // NOTE: This has no measurable impact on performance,
+            // but it might help in some usage patterns.
+            if (len+2 > list.length) {
+                int[] temp = new int[len + 2 + GROW_EXTRA];
+                if (i != 0) System.arraycopy(list, 0, temp, 0, i);
+                System.arraycopy(list, i, temp, i+2, len-i);
+                list = temp;
+            } else {
+                System.arraycopy(list, i, list, i+2, len-i);
+            }
+
+            list[i] = c;
+            list[i+1] = c+1;
+            len += 2;
+        }
+
+        return this;
+    }
+
+    /**
+     * Adds the specified multicharacter to this set if it is not already
+     * present.  If this set already contains the multicharacter,
+     * the call leaves this set unchanged.
+     * Thus {@code "ch" => {"ch"}}
+     * @param s the source string
+     * @return this object, for chaining
+     * @stable ICU 2.0
+     */
+    public final UnicodeSet add(CharSequence s) {
+        checkFrozen();
+        int cp = getSingleCP(s);
+        if (cp < 0) {
+            strings.add(s.toString());
+        } else {
+            add_unchecked(cp, cp);
+        }
+        return this;
+    }
+
+    /**
+     * Utility for getting code point from single code point CharSequence.
+     * See the public UTF16.getSingleCodePoint() (which returns -1 for null rather than throwing NPE).
+     *
+     * @return a code point IF the string consists of a single one.
+     * otherwise returns -1.
+     * @param s to test
+     */
+    private static int getSingleCP(CharSequence s) {
+        if (s.length() == 1) return s.charAt(0);
+        if (s.length() == 2) {
+            int cp = Character.codePointAt(s, 0);
+            if (cp > 0xFFFF) { // is surrogate pair
+                return cp;
+            }
+        }
+        return -1;
+    }
+
+    /**
+     * Complements the specified range in this set.  Any character in
+     * the range will be removed if it is in this set, or will be
+     * added if it is not in this set.  If <code>start &gt; end</code>
+     * then an empty range is complemented, leaving the set unchanged.
+     *
+     * @param start first character, inclusive, of range
+     * @param end last character, inclusive, of range
+     * @stable ICU 2.0
+     */
+    public UnicodeSet complement(int start, int end) {
+        checkFrozen();
+        if (start < MIN_VALUE || start > MAX_VALUE) {
+            throw new IllegalArgumentException("Invalid code point U+" + Utility.hex(start, 6));
+        }
+        if (end < MIN_VALUE || end > MAX_VALUE) {
+            throw new IllegalArgumentException("Invalid code point U+" + Utility.hex(end, 6));
+        }
+        if (start <= end) {
+            xor(range(start, end), 2, 0);
+        }
+        return this;
+    }
+
+    /**
+     * Returns true if this set contains the given character.
+     * @param c character to be checked for containment
+     * @return true if the test condition is met
+     * @stable ICU 2.0
+     */
+    public boolean contains(int c) {
+        if (c < MIN_VALUE || c > MAX_VALUE) {
+            throw new IllegalArgumentException("Invalid code point U+" + Utility.hex(c, 6));
+        }
+        if (bmpSet != null) {
+            return bmpSet.contains(c);
+        }
+        if (stringSpan != null) {
+            return stringSpan.contains(c);
+        }
+
+        /*
+        // Set i to the index of the start item greater than ch
+        // We know we will terminate without length test!
+        int i = -1;
+        while (true) {
+            if (c < list[++i]) break;
+        }
+         */
+
+        int i = findCodePoint(c);
+
+        return ((i & 1) != 0); // return true if odd
+    }
+
+    /**
+     * Returns the smallest value i such that c < list[i].  Caller
+     * must ensure that c is a legal value or this method will enter
+     * an infinite loop.  This method performs a binary search.
+     * @param c a character in the range MIN_VALUE..MAX_VALUE
+     * inclusive
+     * @return the smallest integer i in the range 0..len-1,
+     * inclusive, such that c < list[i]
+     */
+    private final int findCodePoint(int c) {
+        /* Examples:
+                                           findCodePoint(c)
+           set              list[]         c=0 1 3 4 7 8
+           ===              ==============   ===========
+           []               [110000]         0 0 0 0 0 0
+           [\u0000-\u0003]  [0, 4, 110000]   1 1 1 2 2 2
+           [\u0004-\u0007]  [4, 8, 110000]   0 0 0 1 1 2
+           [:all:]          [0, 110000]      1 1 1 1 1 1
+         */
+
+        // Return the smallest i such that c < list[i].  Assume
+        // list[len - 1] == HIGH and that c is legal (0..HIGH-1).
+        if (c < list[0]) return 0;
+        // High runner test.  c is often after the last range, so an
+        // initial check for this condition pays off.
+        if (len >= 2 && c >= list[len-2]) return len-1;
+        int lo = 0;
+        int hi = len - 1;
+        // invariant: c >= list[lo]
+        // invariant: c < list[hi]
+        for (;;) {
+            int i = (lo + hi) >>> 1;
+        if (i == lo) return hi;
+            if (c < list[i]) {
+                hi = i;
+            } else {
+                lo = i;
+            }
+        }
+    }
+
+    /**
+     * Retains only the elements in this set that are contained in the
+     * specified set.  In other words, removes from this set all of
+     * its elements that are not contained in the specified set.  This
+     * operation effectively modifies this set so that its value is
+     * the <i>intersection</i> of the two sets.
+     *
+     * @param c set that defines which elements this set will retain.
+     * @stable ICU 2.0
+     */
+    public UnicodeSet retainAll(UnicodeSet c) {
+        checkFrozen();
+        retain(c.list, c.len, 0);
+        strings.retainAll(c.strings);
+        return this;
+    }
+
+    /**
+     * Removes all of the elements from this set.  This set will be
+     * empty after this call returns.
+     * @stable ICU 2.0
+     */
+    public UnicodeSet clear() {
+        checkFrozen();
+        list[0] = HIGH;
+        len = 1;
+        strings.clear();
+        return this;
+    }
+
+    /**
+     * Iteration method that returns the number of ranges contained in
+     * this set.
+     * @see #getRangeStart
+     * @see #getRangeEnd
+     * @stable ICU 2.0
+     */
+    public int getRangeCount() {
+        return len/2;
+    }
+
+    /**
+     * Iteration method that returns the first character in the
+     * specified range of this set.
+     * @exception ArrayIndexOutOfBoundsException if index is outside
+     * the range <code>0..getRangeCount()-1</code>
+     * @see #getRangeCount
+     * @see #getRangeEnd
+     * @stable ICU 2.0
+     */
+    public int getRangeStart(int index) {
+        return list[index*2];
+    }
+
+    /**
+     * Iteration method that returns the last character in the
+     * specified range of this set.
+     * @exception ArrayIndexOutOfBoundsException if index is outside
+     * the range <code>0..getRangeCount()-1</code>
+     * @see #getRangeStart
+     * @see #getRangeEnd
+     * @stable ICU 2.0
+     */
+    public int getRangeEnd(int index) {
+        return (list[index*2 + 1] - 1);
+    }
+
+    //----------------------------------------------------------------
+    // Implementation: Pattern parsing
+    //----------------------------------------------------------------
+
+    /**
+     * Parses the given pattern, starting at the given position.  The character
+     * at pattern.charAt(pos.getIndex()) must be '[', or the parse fails.
+     * Parsing continues until the corresponding closing ']'.  If a syntax error
+     * is encountered between the opening and closing brace, the parse fails.
+     * Upon return from a successful parse, the ParsePosition is updated to
+     * point to the character following the closing ']', and an inversion
+     * list for the parsed pattern is returned.  This method
+     * calls itself recursively to parse embedded subpatterns.
+     *
+     * @param pattern the string containing the pattern to be parsed.  The
+     * portion of the string from pos.getIndex(), which must be a '[', to the
+     * corresponding closing ']', is parsed.
+     * @param pos upon entry, the position at which to being parsing.  The
+     * character at pattern.charAt(pos.getIndex()) must be a '['.  Upon return
+     * from a successful parse, pos.getIndex() is either the character after the
+     * closing ']' of the parsed pattern, or pattern.length() if the closing ']'
+     * is the last character of the pattern string.
+     * @return an inversion list for the parsed substring
+     * of <code>pattern</code>
+     * @exception java.lang.IllegalArgumentException if the parse fails.
+     */
+    private UnicodeSet applyPattern(String pattern,
+            ParsePosition pos) {
+        if ("[:age=3.2:]".equals(pattern)) {
+            checkFrozen();
+            VersionInfo version = VersionInfo.getInstance("3.2");
+            applyFilter(new VersionFilter(version), UCharacterProperty.SRC_PROPSVEC);
+        } else {
+            throw new IllegalStateException("UnicodeSet.applyPattern(unexpected pattern "
+                          + pattern + ")");
+        }
+
+        return this;
+    }
+
+    //----------------------------------------------------------------
+    // Implementation: Utility methods
+    //----------------------------------------------------------------
+
+    private void ensureCapacity(int newLen) {
+        if (newLen <= list.length) return;
+        int[] temp = new int[newLen + GROW_EXTRA];
+        System.arraycopy(list, 0, temp, 0, len);
+        list = temp;
+    }
+
+    private void ensureBufferCapacity(int newLen) {
+        if (buffer != null && newLen <= buffer.length) return;
+        buffer = new int[newLen + GROW_EXTRA];
+    }
+
+    /**
+     * Assumes start <= end.
+     */
+    private int[] range(int start, int end) {
+        if (rangeList == null) {
+            rangeList = new int[] { start, end+1, HIGH };
+        } else {
+            rangeList[0] = start;
+            rangeList[1] = end+1;
+        }
+        return rangeList;
+    }
+
+    //----------------------------------------------------------------
+    // Implementation: Fundamental operations
+    //----------------------------------------------------------------
+
+    // polarity = 0, 3 is normal: x xor y
+    // polarity = 1, 2: x xor ~y == x === y
+
+    private UnicodeSet xor(int[] other, int otherLen, int polarity) {
+        ensureBufferCapacity(len + otherLen);
+        int i = 0, j = 0, k = 0;
+        int a = list[i++];
+        int b;
+        if (polarity == 1 || polarity == 2) {
+            b = LOW;
+            if (other[j] == LOW) { // skip base if already LOW
+                ++j;
+                b = other[j];
+            }
+        } else {
+            b = other[j++];
+        }
+        // simplest of all the routines
+        // sort the values, discarding identicals!
+        while (true) {
+            if (a < b) {
+                buffer[k++] = a;
+                a = list[i++];
+            } else if (b < a) {
+                buffer[k++] = b;
+                b = other[j++];
+            } else if (a != HIGH) { // at this point, a == b
+                // discard both values!
+                a = list[i++];
+                b = other[j++];
+            } else { // DONE!
+                buffer[k++] = HIGH;
+                len = k;
+                break;
+            }
+        }
+        // swap list and buffer
+        int[] temp = list;
+        list = buffer;
+        buffer = temp;
+        return this;
+    }
+
+    // polarity = 0 is normal: x union y
+    // polarity = 2: x union ~y
+    // polarity = 1: ~x union y
+    // polarity = 3: ~x union ~y
+
+    private UnicodeSet add(int[] other, int otherLen, int polarity) {
+        ensureBufferCapacity(len + otherLen);
+        int i = 0, j = 0, k = 0;
+        int a = list[i++];
+        int b = other[j++];
+        // change from xor is that we have to check overlapping pairs
+        // polarity bit 1 means a is second, bit 2 means b is.
+        main:
+            while (true) {
+                switch (polarity) {
+                case 0: // both first; take lower if unequal
+                    if (a < b) { // take a
+                        // Back up over overlapping ranges in buffer[]
+                        if (k > 0 && a <= buffer[k-1]) {
+                            // Pick latter end value in buffer[] vs. list[]
+                            a = max(list[i], buffer[--k]);
+                        } else {
+                            // No overlap
+                            buffer[k++] = a;
+                            a = list[i];
+                        }
+                        i++; // Common if/else code factored out
+                        polarity ^= 1;
+                    } else if (b < a) { // take b
+                        if (k > 0 && b <= buffer[k-1]) {
+                            b = max(other[j], buffer[--k]);
+                        } else {
+                            buffer[k++] = b;
+                            b = other[j];
+                        }
+                        j++;
+                        polarity ^= 2;
+                    } else { // a == b, take a, drop b
+                        if (a == HIGH) break main;
+                        // This is symmetrical; it doesn't matter if
+                        // we backtrack with a or b. - liu
+                        if (k > 0 && a <= buffer[k-1]) {
+                            a = max(list[i], buffer[--k]);
+                        } else {
+                            // No overlap
+                            buffer[k++] = a;
+                            a = list[i];
+                        }
+                        i++;
+                        polarity ^= 1;
+                        b = other[j++]; polarity ^= 2;
+                    }
+                    break;
+                case 3: // both second; take higher if unequal, and drop other
+                    if (b <= a) { // take a
+                        if (a == HIGH) break main;
+                        buffer[k++] = a;
+                    } else { // take b
+                        if (b == HIGH) break main;
+                        buffer[k++] = b;
+                    }
+                    a = list[i++]; polarity ^= 1;   // factored common code
+                    b = other[j++]; polarity ^= 2;
+                    break;
+                case 1: // a second, b first; if b < a, overlap
+                    if (a < b) { // no overlap, take a
+                        buffer[k++] = a; a = list[i++]; polarity ^= 1;
+                    } else if (b < a) { // OVERLAP, drop b
+                        b = other[j++]; polarity ^= 2;
+                    } else { // a == b, drop both!
+                        if (a == HIGH) break main;
+                        a = list[i++]; polarity ^= 1;
+                        b = other[j++]; polarity ^= 2;
+                    }
+                    break;
+                case 2: // a first, b second; if a < b, overlap
+                    if (b < a) { // no overlap, take b
+                        buffer[k++] = b; b = other[j++]; polarity ^= 2;
+                    } else  if (a < b) { // OVERLAP, drop a
+                        a = list[i++]; polarity ^= 1;
+                    } else { // a == b, drop both!
+                        if (a == HIGH) break main;
+                        a = list[i++]; polarity ^= 1;
+                        b = other[j++]; polarity ^= 2;
+                    }
+                    break;
+                }
+            }
+        buffer[k++] = HIGH;    // terminate
+        len = k;
+        // swap list and buffer
+        int[] temp = list;
+        list = buffer;
+        buffer = temp;
+        return this;
+    }
+
+    // polarity = 0 is normal: x intersect y
+    // polarity = 2: x intersect ~y == set-minus
+    // polarity = 1: ~x intersect y
+    // polarity = 3: ~x intersect ~y
+
+    private UnicodeSet retain(int[] other, int otherLen, int polarity) {
+        ensureBufferCapacity(len + otherLen);
+        int i = 0, j = 0, k = 0;
+        int a = list[i++];
+        int b = other[j++];
+        // change from xor is that we have to check overlapping pairs
+        // polarity bit 1 means a is second, bit 2 means b is.
+        main:
+            while (true) {
+                switch (polarity) {
+                case 0: // both first; drop the smaller
+                    if (a < b) { // drop a
+                        a = list[i++]; polarity ^= 1;
+                    } else if (b < a) { // drop b
+                        b = other[j++]; polarity ^= 2;
+                    } else { // a == b, take one, drop other
+                        if (a == HIGH) break main;
+                        buffer[k++] = a; a = list[i++]; polarity ^= 1;
+                        b = other[j++]; polarity ^= 2;
+                    }
+                    break;
+                case 3: // both second; take lower if unequal
+                    if (a < b) { // take a
+                        buffer[k++] = a; a = list[i++]; polarity ^= 1;
+                    } else if (b < a) { // take b
+                        buffer[k++] = b; b = other[j++]; polarity ^= 2;
+                    } else { // a == b, take one, drop other
+                        if (a == HIGH) break main;
+                        buffer[k++] = a; a = list[i++]; polarity ^= 1;
+                        b = other[j++]; polarity ^= 2;
+                    }
+                    break;
+                case 1: // a second, b first;
+                    if (a < b) { // NO OVERLAP, drop a
+                        a = list[i++]; polarity ^= 1;
+                    } else if (b < a) { // OVERLAP, take b
+                        buffer[k++] = b; b = other[j++]; polarity ^= 2;
+                    } else { // a == b, drop both!
+                        if (a == HIGH) break main;
+                        a = list[i++]; polarity ^= 1;
+                        b = other[j++]; polarity ^= 2;
+                    }
+                    break;
+                case 2: // a first, b second; if a < b, overlap
+                    if (b < a) { // no overlap, drop b
+                        b = other[j++]; polarity ^= 2;
+                    } else  if (a < b) { // OVERLAP, take a
+                        buffer[k++] = a; a = list[i++]; polarity ^= 1;
+                    } else { // a == b, drop both!
+                        if (a == HIGH) break main;
+                        a = list[i++]; polarity ^= 1;
+                        b = other[j++]; polarity ^= 2;
+                    }
+                    break;
+                }
+            }
+        buffer[k++] = HIGH;    // terminate
+        len = k;
+        // swap list and buffer
+        int[] temp = list;
+        list = buffer;
+        buffer = temp;
+        return this;
+    }
+
+    private static final int max(int a, int b) {
+        return (a > b) ? a : b;
+    }
+
+    //----------------------------------------------------------------
+    // Generic filter-based scanning code
+    //----------------------------------------------------------------
+
+    private static interface Filter {
+        boolean contains(int codePoint);
+    }
+
+    private static final VersionInfo NO_VERSION = VersionInfo.getInstance(0, 0, 0, 0);
+
+    private static class VersionFilter implements Filter {
+        VersionInfo version;
+        VersionFilter(VersionInfo version) { this.version = version; }
+        public boolean contains(int ch) {
+            VersionInfo v = UCharacter.getAge(ch);
+            // Reference comparison ok; VersionInfo caches and reuses
+            // unique objects.
+            return v != NO_VERSION &&
+                    v.compareTo(version) <= 0;
+        }
+    }
+
+    private static synchronized UnicodeSet getInclusions(int src) {
+        if (src != UCharacterProperty.SRC_PROPSVEC) {
+            throw new IllegalStateException("UnicodeSet.getInclusions(unknown src "+src+")");
+        }
+
+        if (INCLUSION == null) {
+            UnicodeSet incl = new UnicodeSet();
+            UCharacterProperty.INSTANCE.upropsvec_addPropertyStarts(incl);
+            INCLUSION = incl;
+        }
+        return INCLUSION;
+    }
+
+    /**
+     * Generic filter-based scanning code for UCD property UnicodeSets.
+     */
+    private UnicodeSet applyFilter(Filter filter, int src) {
+        // Logically, walk through all Unicode characters, noting the start
+        // and end of each range for which filter.contain(c) is
+        // true.  Add each range to a set.
+        //
+        // To improve performance, use an inclusions set which
+        // encodes information about character ranges that are known
+        // to have identical properties.
+        // getInclusions(src) contains exactly the first characters of
+        // same-value ranges for the given properties "source".
+
+        clear();
+
+        int startHasProperty = -1;
+        UnicodeSet inclusions = getInclusions(src);
+        int limitRange = inclusions.getRangeCount();
+
+        for (int j=0; j<limitRange; ++j) {
+            // get current range
+            int start = inclusions.getRangeStart(j);
+            int end = inclusions.getRangeEnd(j);
+
+            // for all the code points in the range, process
+            for (int ch = start; ch <= end; ++ch) {
+                // only add to the unicodeset on inflection points --
+                // where the hasProperty value changes to false
+                if (filter.contains(ch)) {
+                    if (startHasProperty < 0) {
+                        startHasProperty = ch;
+                    }
+                } else if (startHasProperty >= 0) {
+                    add_unchecked(startHasProperty, ch-1);
+                    startHasProperty = -1;
+                }
+            }
+        }
+        if (startHasProperty >= 0) {
+            add_unchecked(startHasProperty, 0x10FFFF);
+        }
+
+        return this;
+    }
+
+    /**
+     * Is this frozen, according to the Freezable interface?
+     *
+     * @return value
+     * @stable ICU 3.8
+     */
+    public boolean isFrozen() {
+        return (bmpSet != null || stringSpan != null);
+    }
+
+    /**
+     * Freeze this class, according to the Freezable interface.
+     *
+     * @return this
+     * @stable ICU 4.4
+     */
+    public UnicodeSet freeze() {
+        if (!isFrozen()) {
+            // Do most of what compact() does before freezing because
+            // compact() will not work when the set is frozen.
+            // Small modification: Don't shrink if the savings would be tiny (<=GROW_EXTRA).
+
+            // Delete buffer first to defragment memory less.
+            buffer = null;
+            if (list.length > (len + GROW_EXTRA)) {
+                // Make the capacity equal to len or 1.
+                // We don't want to realloc of 0 size.
+                int capacity = (len == 0) ? 1 : len;
+                int[] oldList = list;
+                list = new int[capacity];
+                for (int i = capacity; i-- > 0;) {
+                    list[i] = oldList[i];
+                }
+            }
+
+            // Optimize contains() and span() and similar functions.
+            if (!strings.isEmpty()) {
+                stringSpan = new UnicodeSetStringSpan(this, new ArrayList<String>(strings), UnicodeSetStringSpan.ALL);
+            }
+            if (stringSpan == null || !stringSpan.needsStringSpanUTF16()) {
+                // Optimize for code point spans.
+                // There are no strings, or
+                // all strings are irrelevant for span() etc. because
+                // all of each string's code points are contained in this set.
+                // However, fully contained strings are relevant for spanAndCount(),
+                // so we create both objects.
+                bmpSet = new BMPSet(list, len);
+            }
+        }
+        return this;
+    }
+
+    /**
+     * Span a string using this UnicodeSet.
+     * <p>To replace, count elements, or delete spans, see {@link com.ibm.icu.text.UnicodeSetSpanner UnicodeSetSpanner}.
+     * @param s The string to be spanned
+     * @param spanCondition The span condition
+     * @return the length of the span
+     * @stable ICU 4.4
+     */
+    public int span(CharSequence s, SpanCondition spanCondition) {
+        return span(s, 0, spanCondition);
+    }
+
+    /**
+     * Span a string using this UnicodeSet.
+     *   If the start index is less than 0, span will start from 0.
+     *   If the start index is greater than the string length, span returns the string length.
+     * <p>To replace, count elements, or delete spans, see {@link com.ibm.icu.text.UnicodeSetSpanner UnicodeSetSpanner}.
+     * @param s The string to be spanned
+     * @param start The start index that the span begins
+     * @param spanCondition The span condition
+     * @return the string index which ends the span (i.e. exclusive)
+     * @stable ICU 4.4
+     */
+    public int span(CharSequence s, int start, SpanCondition spanCondition) {
+        int end = s.length();
+        if (start < 0) {
+            start = 0;
+        } else if (start >= end) {
+            return end;
+        }
+        if (bmpSet != null) {
+            // Frozen set without strings, or no string is relevant for span().
+            return bmpSet.span(s, start, spanCondition, null);
+        }
+        if (stringSpan != null) {
+            return stringSpan.span(s, start, spanCondition);
+        } else if (!strings.isEmpty()) {
+            int which = spanCondition == SpanCondition.NOT_CONTAINED ? UnicodeSetStringSpan.FWD_UTF16_NOT_CONTAINED
+                    : UnicodeSetStringSpan.FWD_UTF16_CONTAINED;
+            UnicodeSetStringSpan strSpan = new UnicodeSetStringSpan(this, new ArrayList<String>(strings), which);
+            if (strSpan.needsStringSpanUTF16()) {
+                return strSpan.span(s, start, spanCondition);
+            }
+        }
+
+        return spanCodePointsAndCount(s, start, spanCondition, null);
+    }
+
+    /**
+     * Same as span() but also counts the smallest number of set elements on any path across the span.
+     * <p>To replace, count elements, or delete spans, see {@link com.ibm.icu.text.UnicodeSetSpanner UnicodeSetSpanner}.
+     * @param outCount An output-only object (must not be null) for returning the count.
+     * @return the limit (exclusive end) of the span
+     */
+    public int spanAndCount(CharSequence s, int start, SpanCondition spanCondition, OutputInt outCount) {
+        if (outCount == null) {
+            throw new IllegalArgumentException("outCount must not be null");
+        }
+        int end = s.length();
+        if (start < 0) {
+            start = 0;
+        } else if (start >= end) {
+            return end;
+        }
+        if (stringSpan != null) {
+            // We might also have bmpSet != null,
+            // but fully-contained strings are relevant for counting elements.
+            return stringSpan.spanAndCount(s, start, spanCondition, outCount);
+        } else if (bmpSet != null) {
+            return bmpSet.span(s, start, spanCondition, outCount);
+        } else if (!strings.isEmpty()) {
+            int which = spanCondition == SpanCondition.NOT_CONTAINED ? UnicodeSetStringSpan.FWD_UTF16_NOT_CONTAINED
+                    : UnicodeSetStringSpan.FWD_UTF16_CONTAINED;
+            which |= UnicodeSetStringSpan.WITH_COUNT;
+            UnicodeSetStringSpan strSpan = new UnicodeSetStringSpan(this, new ArrayList<String>(strings), which);
+            return strSpan.spanAndCount(s, start, spanCondition, outCount);
+        }
+
+        return spanCodePointsAndCount(s, start, spanCondition, outCount);
+    }
+
+    private int spanCodePointsAndCount(CharSequence s, int start,
+            SpanCondition spanCondition, OutputInt outCount) {
+        // Pin to 0/1 values.
+        boolean spanContained = (spanCondition != SpanCondition.NOT_CONTAINED);
+
+        int c;
+        int next = start;
+        int length = s.length();
+        int count = 0;
+        do {
+            c = Character.codePointAt(s, next);
+            if (spanContained != contains(c)) {
+                break;
+            }
+            ++count;
+            next += Character.charCount(c);
+        } while (next < length);
+        if (outCount != null) { outCount.value = count; }
+        return next;
+    }
+
+    /**
+     * Span a string backwards (from the fromIndex) using this UnicodeSet.
+     * If the fromIndex is less than 0, spanBack will return 0.
+     * If fromIndex is greater than the string length, spanBack will start from the string length.
+     * <p>To replace, count elements, or delete spans, see {@link com.ibm.icu.text.UnicodeSetSpanner UnicodeSetSpanner}.
+     * @param s The string to be spanned
+     * @param fromIndex The index of the char (exclusive) that the string should be spanned backwards
+     * @param spanCondition The span condition
+     * @return The string index which starts the span (i.e. inclusive).
+     * @stable ICU 4.4
+     */
+    public int spanBack(CharSequence s, int fromIndex, SpanCondition spanCondition) {
+        if (fromIndex <= 0) {
+            return 0;
+        }
+        if (fromIndex > s.length()) {
+            fromIndex = s.length();
+        }
+        if (bmpSet != null) {
+            // Frozen set without strings, or no string is relevant for spanBack().
+            return bmpSet.spanBack(s, fromIndex, spanCondition);
+        }
+        if (stringSpan != null) {
+            return stringSpan.spanBack(s, fromIndex, spanCondition);
+        } else if (!strings.isEmpty()) {
+            int which = (spanCondition == SpanCondition.NOT_CONTAINED)
+                    ? UnicodeSetStringSpan.BACK_UTF16_NOT_CONTAINED
+                            : UnicodeSetStringSpan.BACK_UTF16_CONTAINED;
+            UnicodeSetStringSpan strSpan = new UnicodeSetStringSpan(this, new ArrayList<String>(strings), which);
+            if (strSpan.needsStringSpanUTF16()) {
+                return strSpan.spanBack(s, fromIndex, spanCondition);
+            }
+        }
+
+        // Pin to 0/1 values.
+        boolean spanContained = (spanCondition != SpanCondition.NOT_CONTAINED);
+
+        int c;
+        int prev = fromIndex;
+        do {
+            c = Character.codePointBefore(s, prev);
+            if (spanContained != contains(c)) {
+                break;
+            }
+            prev -= Character.charCount(c);
+        } while (prev > 0);
+        return prev;
+    }
+
+    /**
+     * Clone a thawed version of this class, according to the Freezable interface.
+     * @return the clone, not frozen
+     * @stable ICU 4.4
+     */
+    public UnicodeSet cloneAsThawed() {
+        UnicodeSet result = new UnicodeSet(this);
+        assert !result.isFrozen();
+        return result;
+    }
+
+    // internal function
+    private void checkFrozen() {
+        if (isFrozen()) {
+            throw new UnsupportedOperationException("Attempt to modify frozen object");
+        }
+    }
+
+    /**
+     * Argument values for whether span() and similar functions continue while the current character is contained vs.
+     * not contained in the set.
+     * <p>
+     * The functionality is straightforward for sets with only single code points, without strings (which is the common
+     * case):
+     * <ul>
+     * <li>CONTAINED and SIMPLE work the same.
+     * <li>CONTAINED and SIMPLE are inverses of NOT_CONTAINED.
+     * <li>span() and spanBack() partition any string the
+     * same way when alternating between span(NOT_CONTAINED) and span(either "contained" condition).
+     * <li>Using a
+     * complemented (inverted) set and the opposite span conditions yields the same results.
+     * </ul>
+     * When a set contains multi-code point strings, then these statements may not be true, depending on the strings in
+     * the set (for example, whether they overlap with each other) and the string that is processed. For a set with
+     * strings:
+     * <ul>
+     * <li>The complement of the set contains the opposite set of code points, but the same set of strings.
+     * Therefore, complementing both the set and the span conditions may yield different results.
+     * <li>When starting spans
+     * at different positions in a string (span(s, ...) vs. span(s+1, ...)) the ends of the spans may be different
+     * because a set string may start before the later position.
+     * <li>span(SIMPLE) may be shorter than
+     * span(CONTAINED) because it will not recursively try all possible paths. For example, with a set which
+     * contains the three strings "xy", "xya" and "ax", span("xyax", CONTAINED) will return 4 but span("xyax",
+     * SIMPLE) will return 3. span(SIMPLE) will never be longer than span(CONTAINED).
+     * <li>With either "contained" condition, span() and spanBack() may partition a string in different ways. For example,
+     * with a set which contains the two strings "ab" and "ba", and when processing the string "aba", span() will yield
+     * contained/not-contained boundaries of { 0, 2, 3 } while spanBack() will yield boundaries of { 0, 1, 3 }.
+     * </ul>
+     * Note: If it is important to get the same boundaries whether iterating forward or backward through a string, then
+     * either only span() should be used and the boundaries cached for backward operation, or an ICU BreakIterator could
+     * be used.
+     * <p>
+     * Note: Unpaired surrogates are treated like surrogate code points. Similarly, set strings match only on code point
+     * boundaries, never in the middle of a surrogate pair.
+     *
+     * @stable ICU 4.4
+     */
+    public enum SpanCondition {
+        /**
+         * Continues a span() while there is no set element at the current position.
+         * Increments by one code point at a time.
+         * Stops before the first set element (character or string).
+         * (For code points only, this is like while contains(current)==false).
+         * <p>
+         * When span() returns, the substring between where it started and the position it returned consists only of
+         * characters that are not in the set, and none of its strings overlap with the span.
+         *
+         * @stable ICU 4.4
+         */
+        NOT_CONTAINED,
+
+        /**
+         * Spans the longest substring that is a concatenation of set elements (characters or strings).
+         * (For characters only, this is like while contains(current)==true).
+         * <p>
+         * When span() returns, the substring between where it started and the position it returned consists only of set
+         * elements (characters or strings) that are in the set.
+         * <p>
+         * If a set contains strings, then the span will be the longest substring for which there
+         * exists at least one non-overlapping concatenation of set elements (characters or strings).
+         * This is equivalent to a POSIX regular expression for <code>(OR of each set element)*</code>.
+         * (Java/ICU/Perl regex stops at the first match of an OR.)
+         *
+         * @stable ICU 4.4
+         */
+        CONTAINED,
+
+        /**
+         * Continues a span() while there is a set element at the current position.
+         * Increments by the longest matching element at each position.
+         * (For characters only, this is like while contains(current)==true).
+         * <p>
+         * When span() returns, the substring between where it started and the position it returned consists only of set
+         * elements (characters or strings) that are in the set.
+         * <p>
+         * If a set only contains single characters, then this is the same as CONTAINED.
+         * <p>
+         * If a set contains strings, then the span will be the longest substring with a match at each position with the
+         * longest single set element (character or string).
+         * <p>
+         * Use this span condition together with other longest-match algorithms, such as ICU converters
+         * (ucnv_getUnicodeSet()).
+         *
+         * @stable ICU 4.4
+         */
+        SIMPLE,
+    }
+
+}
diff --git a/tests/test_data/std/jdk/internal/icu/util/CodePointMap$Range.class b/tests/test_data/std/jdk/internal/icu/util/CodePointMap$Range.class
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diff --git a/tests/test_data/std/jdk/internal/icu/util/CodePointMap$RangeIterator.class b/tests/test_data/std/jdk/internal/icu/util/CodePointMap$RangeIterator.class
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diff --git a/tests/test_data/std/jdk/internal/icu/util/CodePointMap$RangeOption.class b/tests/test_data/std/jdk/internal/icu/util/CodePointMap$RangeOption.class
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diff --git a/tests/test_data/std/jdk/internal/icu/util/CodePointMap.java b/tests/test_data/std/jdk/internal/icu/util/CodePointMap.java
new file mode 100644
index 00000000..d52ecd46
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/icu/util/CodePointMap.java
@@ -0,0 +1,475 @@
+/*
+ * Copyright (c) 2019, 2023, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+// (c) 2018 and later: Unicode, Inc. and others.
+// License & terms of use: http://www.unicode.org/copyright.html#License
+
+// created: 2018may10 Markus W. Scherer
+
+package jdk.internal.icu.util;
+
+import java.util.Iterator;
+import java.util.NoSuchElementException;
+
+/**
+ * Abstract map from Unicode code points (U+0000..U+10FFFF) to integer values.
+ * This does not implement java.util.Map.
+ *
+ * @stable ICU 63
+ */
+public abstract class CodePointMap implements Iterable<CodePointMap.Range> {
+    /**
+     * Selectors for how getRange() should report value ranges overlapping with surrogates.
+     * Most users should use NORMAL.
+     *
+     * @see #getRange
+     * @stable ICU 63
+     */
+    public enum RangeOption {
+        /**
+         * getRange() enumerates all same-value ranges as stored in the map.
+         * Most users should use this option.
+         *
+         * @stable ICU 63
+         */
+        NORMAL,
+        /**
+         * getRange() enumerates all same-value ranges as stored in the map,
+         * except that lead surrogates (U+D800..U+DBFF) are treated as having the
+         * surrogateValue, which is passed to getRange() as a separate parameter.
+         * The surrogateValue is not transformed via filter().
+         * See {@link Character#isHighSurrogate}.
+         *
+         * <p>Most users should use NORMAL instead.
+         *
+         * <p>This option is useful for maps that map surrogate code <i>units</i> to
+         * special values optimized for UTF-16 string processing
+         * or for special error behavior for unpaired surrogates,
+         * but those values are not to be associated with the lead surrogate code <i>points</i>.
+         *
+         * @stable ICU 63
+         */
+        FIXED_LEAD_SURROGATES,
+        /**
+         * getRange() enumerates all same-value ranges as stored in the map,
+         * except that all surrogates (U+D800..U+DFFF) are treated as having the
+         * surrogateValue, which is passed to getRange() as a separate parameter.
+         * The surrogateValue is not transformed via filter().
+         * See {@link Character#isSurrogate}.
+         *
+         * <p>Most users should use NORMAL instead.
+         *
+         * <p>This option is useful for maps that map surrogate code <i>units</i> to
+         * special values optimized for UTF-16 string processing
+         * or for special error behavior for unpaired surrogates,
+         * but those values are not to be associated with the lead surrogate code <i>points</i>.
+         *
+         * @stable ICU 63
+         */
+        FIXED_ALL_SURROGATES
+    }
+
+    /**
+     * Callback function interface: Modifies a map value.
+     * Optionally called by getRange().
+     * The modified value will be returned by the getRange() function.
+     *
+     * <p>Can be used to ignore some of the value bits,
+     * make a filter for one of several values,
+     * return a value index computed from the map value, etc.
+     *
+     * @see #getRange
+     * @see #iterator
+     * @stable ICU 63
+     */
+    public interface ValueFilter {
+        /**
+         * Modifies the map value.
+         *
+         * @param value map value
+         * @return modified value
+         * @stable ICU 63
+         */
+        public int apply(int value);
+    }
+
+    /**
+     * Range iteration result data.
+     * Code points from start to end map to the same value.
+     * The value may have been modified by {@link ValueFilter#apply(int)},
+     * or it may be the surrogateValue if a RangeOption other than "normal" was used.
+     *
+     * @see #getRange
+     * @see #iterator
+     * @stable ICU 63
+     */
+    public static final class Range {
+        private int start;
+        private int end;
+        private int value;
+
+        /**
+         * Constructor. Sets start and end to -1 and value to 0.
+         *
+         * @stable ICU 63
+         */
+        public Range() {
+            start = end = -1;
+            value = 0;
+        }
+
+        /**
+         * @return the start code point
+         * @stable ICU 63
+         */
+        public int getStart() { return start; }
+        /**
+         * @return the (inclusive) end code point
+         * @stable ICU 63
+         */
+        public int getEnd() { return end; }
+        /**
+         * @return the range value
+         * @stable ICU 63
+         */
+        public int getValue() { return value; }
+        /**
+         * Sets the range. When using {@link #iterator()},
+         * iteration will resume after the newly set end.
+         *
+         * @param start new start code point
+         * @param end new end code point
+         * @param value new value
+         * @stable ICU 63
+         */
+        public void set(int start, int end, int value) {
+            this.start = start;
+            this.end = end;
+            this.value = value;
+        }
+    }
+
+    private final class RangeIterator implements Iterator<Range> {
+        private Range range = new Range();
+
+        @Override
+        public boolean hasNext() {
+            return -1 <= range.end && range.end < 0x10ffff;
+        }
+
+        @Override
+        public Range next() {
+            if (getRange(range.end + 1, null, range)) {
+                return range;
+            } else {
+                throw new NoSuchElementException();
+            }
+        }
+
+        @Override
+        public final void remove() {
+            throw new UnsupportedOperationException();
+        }
+    }
+
+    /**
+     * Iterates over code points of a string and fetches map values.
+     * This does not implement java.util.Iterator.
+     *
+     * <pre>
+     * void onString(CodePointMap map, CharSequence s, int start) {
+     *     CodePointMap.StringIterator iter = map.stringIterator(s, start);
+     *     while (iter.next()) {
+     *         int end = iter.getIndex();  // code point from between start and end
+     *         useValue(s, start, end, iter.getCodePoint(), iter.getValue());
+     *         start = end;
+     *     }
+     * }
+     * </pre>
+     *
+     * <p>This class is not intended for public subclassing.
+     *
+     * @stable ICU 63
+     */
+    public class StringIterator {
+        /**
+         * @internal
+         * @deprecated This API is ICU internal only.
+         */
+        @Deprecated
+        protected CharSequence s;
+        /**
+         * @internal
+         * @deprecated This API is ICU internal only.
+         */
+        @Deprecated
+        protected int sIndex;
+        /**
+         * @internal
+         * @deprecated This API is ICU internal only.
+         */
+        @Deprecated
+        protected int c;
+        /**
+         * @internal
+         * @deprecated This API is ICU internal only.
+         */
+        @Deprecated
+        protected int value;
+
+        /**
+         * @internal
+         * @deprecated This API is ICU internal only.
+         */
+        @Deprecated
+        protected StringIterator(CharSequence s, int sIndex) {
+            this.s = s;
+            this.sIndex = sIndex;
+            c = -1;
+            value = 0;
+        }
+
+        /**
+         * Resets the iterator to a new string and/or a new string index.
+         *
+         * @param s string to iterate over
+         * @param sIndex string index where the iteration will start
+         * @stable ICU 63
+         */
+        public void reset(CharSequence s, int sIndex) {
+            this.s = s;
+            this.sIndex = sIndex;
+            c = -1;
+            value = 0;
+        }
+
+        /**
+         * Reads the next code point, post-increments the string index,
+         * and gets a value from the map.
+         * Sets an implementation-defined error value if the code point is an unpaired surrogate.
+         *
+         * @return true if the string index was not yet at the end of the string;
+         *         otherwise the iterator did not advance
+         * @stable ICU 63
+         */
+        public boolean next() {
+            if (sIndex >= s.length()) {
+                return false;
+            }
+            c = Character.codePointAt(s, sIndex);
+            sIndex += Character.charCount(c);
+            value = get(c);
+            return true;
+        }
+
+        /**
+         * Reads the previous code point, pre-decrements the string index,
+         * and gets a value from the map.
+         * Sets an implementation-defined error value if the code point is an unpaired surrogate.
+         *
+         * @return true if the string index was not yet at the start of the string;
+         *         otherwise the iterator did not advance
+         * @stable ICU 63
+         */
+        public boolean previous() {
+            if (sIndex <= 0) {
+                return false;
+            }
+            c = Character.codePointBefore(s, sIndex);
+            sIndex -= Character.charCount(c);
+            value = get(c);
+            return true;
+        }
+        /**
+         * @return the string index
+         * @stable ICU 63
+         */
+        public final int getIndex() { return sIndex; }
+        /**
+         * @return the code point
+         * @stable ICU 63
+         */
+        public final int getCodePoint() { return c; }
+        /**
+         * @return the map value,
+         *         or an implementation-defined error value if
+         *         the code point is an unpaired surrogate
+         * @stable ICU 63
+         */
+        public final int getValue() { return value; }
+    }
+
+    /**
+     * Protected no-args constructor.
+     *
+     * @stable ICU 63
+     */
+    protected CodePointMap() {
+    }
+
+    /**
+     * Returns the value for a code point as stored in the map, with range checking.
+     * Returns an implementation-defined error value if c is not in the range 0..U+10FFFF.
+     *
+     * @param c the code point
+     * @return the map value,
+     *         or an implementation-defined error value if
+     *         the code point is not in the range 0..U+10FFFF
+     * @stable ICU 63
+     */
+    public abstract int get(int c);
+
+    /**
+     * Sets the range object to a range of code points beginning with the start parameter.
+     * The range start is the same as the start input parameter
+     * (even if there are preceding code points that have the same value).
+     * The range end is the last code point such that
+     * all those from start to there have the same value.
+     * Returns false if start is not 0..U+10FFFF.
+     * Can be used to efficiently iterate over all same-value ranges in a map.
+     * (This is normally faster than iterating over code points and get()ting each value,
+     * but may be much slower than a data structure that stores ranges directly.)
+     *
+     * <p>If the {@link ValueFilter} parameter is not null, then
+     * the value to be delivered is passed through that filter, and the return value is the end
+     * of the range where all values are modified to the same actual value.
+     * The value is unchanged if that parameter is null.
+     *
+     * <p>Example:
+     * <pre>
+     * int start = 0;
+     * CodePointMap.Range range = new CodePointMap.Range();
+     * while (map.getRange(start, null, range)) {
+     *     int end = range.getEnd();
+     *     int value = range.getValue();
+     *     // Work with the range start..end and its value.
+     *     start = end + 1;
+     * }
+     * </pre>
+     *
+     * @param start range start
+     * @param filter an object that may modify the map data value,
+     *     or null if the values from the map are to be used unmodified
+     * @param range the range object that will be set to the code point range and value
+     * @return true if start is 0..U+10FFFF; otherwise no new range is fetched
+     * @stable ICU 63
+     */
+    public abstract boolean getRange(int start, ValueFilter filter, Range range);
+
+    /**
+     * Sets the range object to a range of code points beginning with the start parameter.
+     * The range start is the same as the start input parameter
+     * (even if there are preceding code points that have the same value).
+     * The range end is the last code point such that
+     * all those from start to there have the same value.
+     * Returns false if start is not 0..U+10FFFF.
+     *
+     * <p>Same as the simpler {@link #getRange(int, ValueFilter, Range)} but optionally
+     * modifies the range if it overlaps with surrogate code points.
+     *
+     * @param start range start
+     * @param option defines whether surrogates are treated normally,
+     *               or as having the surrogateValue; usually {@link RangeOption#NORMAL}
+     * @param surrogateValue value for surrogates; ignored if option=={@link RangeOption#NORMAL}
+     * @param filter an object that may modify the map data value,
+     *     or null if the values from the map are to be used unmodified
+     * @param range the range object that will be set to the code point range and value
+     * @return true if start is 0..U+10FFFF; otherwise no new range is fetched
+     * @stable ICU 63
+     */
+    public boolean getRange(int start, RangeOption option, int surrogateValue,
+            ValueFilter filter, Range range) {
+        assert option != null;
+        if (!getRange(start, filter, range)) {
+            return false;
+        }
+        if (option == RangeOption.NORMAL) {
+            return true;
+        }
+        int surrEnd = option == RangeOption.FIXED_ALL_SURROGATES ? 0xdfff : 0xdbff;
+        int end = range.end;
+        if (end < 0xd7ff || start > surrEnd) {
+            return true;
+        }
+        // The range overlaps with surrogates, or ends just before the first one.
+        if (range.value == surrogateValue) {
+            if (end >= surrEnd) {
+                // Surrogates followed by a non-surrValue range,
+                // or surrogates are part of a larger surrValue range.
+                return true;
+            }
+        } else {
+            if (start <= 0xd7ff) {
+                range.end = 0xd7ff;  // Non-surrValue range ends before surrValue surrogates.
+                return true;
+            }
+            // Start is a surrogate with a non-surrValue code *unit* value.
+            // Return a surrValue code *point* range.
+            range.value = surrogateValue;
+            if (end > surrEnd) {
+                range.end = surrEnd;  // Surrogate range ends before non-surrValue rest of range.
+                return true;
+            }
+        }
+        // See if the surrValue surrogate range can be merged with
+        // an immediately following range.
+        if (getRange(surrEnd + 1, filter, range) && range.value == surrogateValue) {
+            range.start = start;
+            return true;
+        }
+        range.start = start;
+        range.end = surrEnd;
+        range.value = surrogateValue;
+        return true;
+    }
+
+    /**
+     * Convenience iterator over same-map-value code point ranges.
+     * Same as looping over all ranges with {@link #getRange(int, ValueFilter, Range)}
+     * without filtering.
+     * Adjacent ranges have different map values.
+     *
+     * <p>The iterator always returns the same Range object.
+     *
+     * @return a Range iterator
+     * @stable ICU 63
+     */
+    @Override
+    public Iterator<Range> iterator() {
+        return new RangeIterator();
+    }
+
+    /**
+     * Returns an iterator (not a java.util.Iterator) over code points of a string
+     * for fetching map values.
+     *
+     * @param s string to iterate over
+     * @param sIndex string index where the iteration will start
+     * @return the iterator
+     * @stable ICU 63
+     */
+    public StringIterator stringIterator(CharSequence s, int sIndex) {
+        return new StringIterator(s, sIndex);
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/icu/util/CodePointTrie$Data.class b/tests/test_data/std/jdk/internal/icu/util/CodePointTrie$Data.class
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diff --git a/tests/test_data/std/jdk/internal/icu/util/CodePointTrie$Fast.class b/tests/test_data/std/jdk/internal/icu/util/CodePointTrie$Fast.class
new file mode 100644
index 0000000000000000000000000000000000000000..1237414cab84916d1504aa33bfe18f390dc0c9f5
GIT binary patch
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literal 0
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diff --git a/tests/test_data/std/jdk/internal/icu/util/CodePointTrie$Fast16.class b/tests/test_data/std/jdk/internal/icu/util/CodePointTrie$Fast16.class
new file mode 100644
index 0000000000000000000000000000000000000000..25bd59379c5ba32218534682891926d093c5538f
GIT binary patch
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literal 0
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diff --git a/tests/test_data/std/jdk/internal/icu/util/CodePointTrie$Fast32.class b/tests/test_data/std/jdk/internal/icu/util/CodePointTrie$Fast32.class
new file mode 100644
index 0000000000000000000000000000000000000000..fc703d08983b7315c1f6868435e4fe0802842e03
GIT binary patch
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literal 0
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diff --git a/tests/test_data/std/jdk/internal/icu/util/CodePointTrie$Fast8.class b/tests/test_data/std/jdk/internal/icu/util/CodePointTrie$Fast8.class
new file mode 100644
index 0000000000000000000000000000000000000000..d53887d2d5ba6d0bbf040f6338ee503bdce933fc
GIT binary patch
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diff --git a/tests/test_data/std/jdk/internal/icu/util/CodePointTrie$Small$SmallStringIterator.class b/tests/test_data/std/jdk/internal/icu/util/CodePointTrie$Small$SmallStringIterator.class
new file mode 100644
index 0000000000000000000000000000000000000000..b8655a18975cb4f580f7370e130f11cf4ddb6035
GIT binary patch
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literal 0
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diff --git a/tests/test_data/std/jdk/internal/icu/util/CodePointTrie$Small.class b/tests/test_data/std/jdk/internal/icu/util/CodePointTrie$Small.class
new file mode 100644
index 0000000000000000000000000000000000000000..3c762a195e83978e285fa4c0f9a44566d6a33be0
GIT binary patch
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diff --git a/tests/test_data/std/jdk/internal/icu/util/CodePointTrie$Small16.class b/tests/test_data/std/jdk/internal/icu/util/CodePointTrie$Small16.class
new file mode 100644
index 0000000000000000000000000000000000000000..1e4f790da6b5773297179b1ffa27984f275d8d72
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diff --git a/tests/test_data/std/jdk/internal/icu/util/CodePointTrie$Small32.class b/tests/test_data/std/jdk/internal/icu/util/CodePointTrie$Small32.class
new file mode 100644
index 0000000000000000000000000000000000000000..86f358e45a6bd5b14804ada715ec4e3ad411de9a
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diff --git a/tests/test_data/std/jdk/internal/icu/util/CodePointTrie$Small8.class b/tests/test_data/std/jdk/internal/icu/util/CodePointTrie$Small8.class
new file mode 100644
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diff --git a/tests/test_data/std/jdk/internal/icu/util/CodePointTrie$Type.class b/tests/test_data/std/jdk/internal/icu/util/CodePointTrie$Type.class
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diff --git a/tests/test_data/std/jdk/internal/icu/util/CodePointTrie$ValueWidth.class b/tests/test_data/std/jdk/internal/icu/util/CodePointTrie$ValueWidth.class
new file mode 100644
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diff --git a/tests/test_data/std/jdk/internal/icu/util/CodePointTrie.class b/tests/test_data/std/jdk/internal/icu/util/CodePointTrie.class
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diff --git a/tests/test_data/std/jdk/internal/icu/util/CodePointTrie.java b/tests/test_data/std/jdk/internal/icu/util/CodePointTrie.java
new file mode 100644
index 00000000..7aaa0be6
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/icu/util/CodePointTrie.java
@@ -0,0 +1,1266 @@
+/*
+ * Copyright (c) 2019, 2022, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+// (c) 2018 and later: Unicode, Inc. and others.
+// License & terms of use: http://www.unicode.org/copyright.html#License
+
+// created: 2018may04 Markus W. Scherer
+
+package jdk.internal.icu.util;
+
+import jdk.internal.icu.impl.ICUBinary;
+
+import java.io.DataOutputStream;
+import java.io.IOException;
+import java.io.UncheckedIOException;
+import java.io.OutputStream;
+import java.nio.ByteBuffer;
+import java.nio.ByteOrder;
+
+import static jdk.internal.icu.impl.NormalizerImpl.UTF16Plus;
+
+/**
+ * Immutable Unicode code point trie.
+ * Fast, reasonably compact, map from Unicode code points (U+0000..U+10FFFF) to integer values.
+ * For details see https://icu.unicode.org/design/struct/utrie
+ *
+ * <p>This class is not intended for public subclassing.
+ *
+ * @see MutableCodePointTrie
+ * @stable ICU 63
+ */
+@SuppressWarnings("deprecation")
+public abstract class CodePointTrie extends CodePointMap {
+    /**
+     * Selectors for the type of a CodePointTrie.
+     * Different trade-offs for size vs. speed.
+     *
+     * <p>Use null for {@link #fromBinary} to accept any type;
+     * {@link #getType} will return the actual type.
+     *
+     * @see MutableCodePointTrie#buildImmutable(CodePointTrie.Type, CodePointTrie.ValueWidth)
+     * @see #fromBinary
+     * @see #getType
+     * @stable ICU 63
+     */
+    public enum Type {
+        /**
+         * Fast/simple/larger BMP data structure.
+         * The {@link Fast} subclasses have additional functions for lookup for BMP and supplementary code points.
+         *
+         * @see Fast
+         * @stable ICU 63
+         */
+        FAST,
+        /**
+         * Small/slower BMP data structure.
+         *
+         * @see Small
+         * @stable ICU 63
+         */
+        SMALL
+    }
+
+    /**
+     * Selectors for the number of bits in a CodePointTrie data value.
+     *
+     * <p>Use null for {@link #fromBinary} to accept any data value width;
+     * {@link #getValueWidth} will return the actual data value width.
+     *
+     * @stable ICU 63
+     */
+    public enum ValueWidth {
+        /**
+         * The trie stores 16 bits per data value.
+         * It returns them as unsigned values 0..0xffff=65535.
+         *
+         * @stable ICU 63
+         */
+        BITS_16,
+        /**
+         * The trie stores 32 bits per data value.
+         *
+         * @stable ICU 63
+         */
+        BITS_32,
+        /**
+         * The trie stores 8 bits per data value.
+         * It returns them as unsigned values 0..0xff=255.
+         *
+         * @stable ICU 63
+         */
+        BITS_8
+    }
+
+    private CodePointTrie(char[] index, Data data, int highStart,
+            int index3NullOffset, int dataNullOffset) {
+        this.ascii = new int[ASCII_LIMIT];
+        this.index = index;
+        this.data = data;
+        this.dataLength = data.getDataLength();
+        this.highStart = highStart;
+        this.index3NullOffset = index3NullOffset;
+        this.dataNullOffset = dataNullOffset;
+
+        for (int c = 0; c < ASCII_LIMIT; ++c) {
+            ascii[c] = data.getFromIndex(c);
+        }
+
+        int nullValueOffset = dataNullOffset;
+        if (nullValueOffset >= dataLength) {
+            nullValueOffset = dataLength - HIGH_VALUE_NEG_DATA_OFFSET;
+        }
+        nullValue = data.getFromIndex(nullValueOffset);
+    }
+
+    /**
+     * Creates a trie from its binary form,
+     * stored in the ByteBuffer starting at the current position.
+     * Advances the buffer position to just after the trie data.
+     * Inverse of {@link #toBinary(OutputStream)}.
+     *
+     * <p>The data is copied from the buffer;
+     * later modification of the buffer will not affect the trie.
+     *
+     * @param type selects the trie type; this method throws an exception
+     *             if the type does not match the binary data;
+     *             use null to accept any type
+     * @param valueWidth selects the number of bits in a data value; this method throws an exception
+     *                  if the valueWidth does not match the binary data;
+     *                  use null to accept any data value width
+     * @param bytes a buffer containing the binary data of a CodePointTrie
+     * @return the trie
+     * @see MutableCodePointTrie#MutableCodePointTrie(int, int)
+     * @see MutableCodePointTrie#buildImmutable(CodePointTrie.Type, CodePointTrie.ValueWidth)
+     * @see #toBinary(OutputStream)
+     * @stable ICU 63
+     */
+    public static CodePointTrie fromBinary(Type type, ValueWidth valueWidth, ByteBuffer bytes) {
+        ByteOrder outerByteOrder = bytes.order();
+        try {
+            // Enough data for a trie header?
+            if (bytes.remaining() < 16 /* sizeof(UCPTrieHeader) */) {
+                throw new InternalError("Buffer too short for a CodePointTrie header");
+            }
+
+            // struct UCPTrieHeader
+            /** "Tri3" in big-endian US-ASCII (0x54726933) */
+            int signature = bytes.getInt();
+
+            // Check the signature.
+            switch (signature) {
+            case 0x54726933:
+                // The buffer is already set to the trie data byte order.
+                break;
+            case 0x33697254:
+                // Temporarily reverse the byte order.
+                boolean isBigEndian = outerByteOrder == ByteOrder.BIG_ENDIAN;
+                bytes.order(isBigEndian ? ByteOrder.LITTLE_ENDIAN : ByteOrder.BIG_ENDIAN);
+                signature = 0x54726933;
+                break;
+            default:
+                throw new InternalError("Buffer does not contain a serialized CodePointTrie");
+            }
+
+            // struct UCPTrieHeader continued
+            /**
+             * Options bit field:
+             * Bits 15..12: Data length bits 19..16.
+             * Bits 11..8: Data null block offset bits 19..16.
+             * Bits 7..6: UCPTrieType
+             * Bits 5..3: Reserved (0).
+             * Bits 2..0: UCPTrieValueWidth
+             */
+            int options = bytes.getChar();
+
+            /** Total length of the index tables. */
+            int indexLength = bytes.getChar();
+
+            /** Data length bits 15..0. */
+            int dataLength = bytes.getChar();
+
+            /** Index-3 null block offset, 0x7fff or 0xffff if none. */
+            int index3NullOffset = bytes.getChar();
+
+            /** Data null block offset bits 15..0, 0xfffff if none. */
+            int dataNullOffset = bytes.getChar();
+
+            /**
+             * First code point of the single-value range ending with U+10ffff,
+             * rounded up and then shifted right by SHIFT_2.
+             */
+            int shiftedHighStart = bytes.getChar();
+            // struct UCPTrieHeader end
+
+            int typeInt = (options >> 6) & 3;
+            Type actualType;
+            switch (typeInt) {
+            case 0: actualType = Type.FAST; break;
+            case 1: actualType = Type.SMALL; break;
+            default:
+                throw new InternalError("CodePointTrie data header has an unsupported type");
+            }
+
+            int valueWidthInt = options & OPTIONS_VALUE_BITS_MASK;
+            ValueWidth actualValueWidth;
+            switch (valueWidthInt) {
+            case 0: actualValueWidth = ValueWidth.BITS_16; break;
+            case 1: actualValueWidth = ValueWidth.BITS_32; break;
+            case 2: actualValueWidth = ValueWidth.BITS_8; break;
+            default:
+                throw new InternalError("CodePointTrie data header has an unsupported value width");
+            }
+
+            if ((options & OPTIONS_RESERVED_MASK) != 0) {
+                throw new InternalError("CodePointTrie data header has unsupported options");
+            }
+
+            if (type == null) {
+                type = actualType;
+            }
+            if (valueWidth == null) {
+                valueWidth = actualValueWidth;
+            }
+            if (type != actualType || valueWidth != actualValueWidth) {
+                throw new InternalError("CodePointTrie data header has a different type or value width than required");
+            }
+
+            // Get the length values and offsets.
+            dataLength |= ((options & OPTIONS_DATA_LENGTH_MASK) << 4);
+            dataNullOffset |= ((options & OPTIONS_DATA_NULL_OFFSET_MASK) << 8);
+
+            int highStart = shiftedHighStart << SHIFT_2;
+
+            // Calculate the actual length, minus the header.
+            int actualLength = indexLength * 2;
+            if (valueWidth == ValueWidth.BITS_16) {
+                actualLength += dataLength * 2;
+            } else if (valueWidth == ValueWidth.BITS_32) {
+                actualLength += dataLength * 4;
+            } else {
+                actualLength += dataLength;
+            }
+            if (bytes.remaining() < actualLength) {
+                throw new InternalError("Buffer too short for the CodePointTrie data");
+            }
+
+            char[] index = ICUBinary.getChars(bytes, indexLength, 0);
+            switch (valueWidth) {
+            case BITS_16: {
+                char[] data16 = ICUBinary.getChars(bytes, dataLength, 0);
+                return type == Type.FAST ?
+                        new Fast16(index, data16, highStart, index3NullOffset, dataNullOffset) :
+                            new Small16(index, data16, highStart, index3NullOffset, dataNullOffset);
+            }
+            case BITS_32: {
+                int[] data32 = ICUBinary.getInts(bytes, dataLength, 0);
+                return type == Type.FAST ?
+                        new Fast32(index, data32, highStart, index3NullOffset, dataNullOffset) :
+                            new Small32(index, data32, highStart, index3NullOffset, dataNullOffset);
+            }
+            case BITS_8: {
+                byte[] data8 = ICUBinary.getBytes(bytes, dataLength, 0);
+                return type == Type.FAST ?
+                        new Fast8(index, data8, highStart, index3NullOffset, dataNullOffset) :
+                            new Small8(index, data8, highStart, index3NullOffset, dataNullOffset);
+            }
+            default:
+                throw new AssertionError("should be unreachable");
+            }
+        } finally {
+            bytes.order(outerByteOrder);
+        }
+    }
+
+    /**
+     * Returns the trie type.
+     *
+     * @return the trie type
+     * @stable ICU 63
+     */
+    public abstract Type getType();
+    /**
+     * Returns the number of bits in a trie data value.
+     *
+     * @return the number of bits in a trie data value
+     * @stable ICU 63
+     */
+    public final ValueWidth getValueWidth() { return data.getValueWidth(); }
+
+    /**
+     * {@inheritDoc}
+     * @stable ICU 63
+     */
+    @Override
+    public int get(int c) {
+        return data.getFromIndex(cpIndex(c));
+    }
+
+    /**
+     * Returns a trie value for an ASCII code point, without range checking.
+     *
+     * @param c the input code point; must be U+0000..U+007F
+     * @return The ASCII code point's trie value.
+     * @stable ICU 63
+     */
+    public final int asciiGet(int c) {
+        return ascii[c];
+    }
+
+    private static final int MAX_UNICODE = 0x10ffff;
+
+    private static final int ASCII_LIMIT = 0x80;
+
+    private static final int maybeFilterValue(int value, int trieNullValue, int nullValue,
+            ValueFilter filter) {
+        if (value == trieNullValue) {
+            value = nullValue;
+        } else if (filter != null) {
+            value = filter.apply(value);
+        }
+        return value;
+    }
+
+    /**
+     * {@inheritDoc}
+     * @stable ICU 63
+     */
+    @Override
+    public final boolean getRange(int start, ValueFilter filter, Range range) {
+        if (start < 0 || MAX_UNICODE < start) {
+            return false;
+        }
+        if (start >= highStart) {
+            int di = dataLength - HIGH_VALUE_NEG_DATA_OFFSET;
+            int value = data.getFromIndex(di);
+            if (filter != null) { value = filter.apply(value); }
+            range.set(start, MAX_UNICODE, value);
+            return true;
+        }
+
+        int nullValue = this.nullValue;
+        if (filter != null) { nullValue = filter.apply(nullValue); }
+        Type type = getType();
+
+        int prevI3Block = -1;
+        int prevBlock = -1;
+        int c = start;
+        // Initialize to make compiler happy. Real value when haveValue is true.
+        int trieValue = 0, value = 0;
+        boolean haveValue = false;
+        do {
+            int i3Block;
+            int i3;
+            int i3BlockLength;
+            int dataBlockLength;
+            if (c <= 0xffff && (type == Type.FAST || c <= SMALL_MAX)) {
+                i3Block = 0;
+                i3 = c >> FAST_SHIFT;
+                i3BlockLength = type == Type.FAST ? BMP_INDEX_LENGTH : SMALL_INDEX_LENGTH;
+                dataBlockLength = FAST_DATA_BLOCK_LENGTH;
+            } else {
+                // Use the multi-stage index.
+                int i1 = c >> SHIFT_1;
+                if (type == Type.FAST) {
+                    assert(0xffff < c && c < highStart);
+                    i1 += BMP_INDEX_LENGTH - OMITTED_BMP_INDEX_1_LENGTH;
+                } else {
+                    assert(c < highStart && highStart > SMALL_LIMIT);
+                    i1 += SMALL_INDEX_LENGTH;
+                }
+                i3Block = index[index[i1] + ((c >> SHIFT_2) & INDEX_2_MASK)];
+                if (i3Block == prevI3Block && (c - start) >= CP_PER_INDEX_2_ENTRY) {
+                    // The index-3 block is the same as the previous one, and filled with value.
+                    assert((c & (CP_PER_INDEX_2_ENTRY - 1)) == 0);
+                    c += CP_PER_INDEX_2_ENTRY;
+                    continue;
+                }
+                prevI3Block = i3Block;
+                if (i3Block == index3NullOffset) {
+                    // This is the index-3 null block.
+                    if (haveValue) {
+                        if (nullValue != value) {
+                            range.set(start, c - 1, value);
+                            return true;
+                        }
+                    } else {
+                        trieValue = this.nullValue;
+                        value = nullValue;
+                        haveValue = true;
+                    }
+                    prevBlock = dataNullOffset;
+                    c = (c + CP_PER_INDEX_2_ENTRY) & ~(CP_PER_INDEX_2_ENTRY - 1);
+                    continue;
+                }
+                i3 = (c >> SHIFT_3) & INDEX_3_MASK;
+                i3BlockLength = INDEX_3_BLOCK_LENGTH;
+                dataBlockLength = SMALL_DATA_BLOCK_LENGTH;
+            }
+            // Enumerate data blocks for one index-3 block.
+            do {
+                int block;
+                if ((i3Block & 0x8000) == 0) {
+                    block = index[i3Block + i3];
+                } else {
+                    // 18-bit indexes stored in groups of 9 entries per 8 indexes.
+                    int group = (i3Block & 0x7fff) + (i3 & ~7) + (i3 >> 3);
+                    int gi = i3 & 7;
+                    block = (index[group++] << (2 + (2 * gi))) & 0x30000;
+                    block |= index[group + gi];
+                }
+                if (block == prevBlock && (c - start) >= dataBlockLength) {
+                    // The block is the same as the previous one, and filled with value.
+                    assert((c & (dataBlockLength - 1)) == 0);
+                    c += dataBlockLength;
+                } else {
+                    int dataMask = dataBlockLength - 1;
+                    prevBlock = block;
+                    if (block == dataNullOffset) {
+                        // This is the data null block.
+                        if (haveValue) {
+                            if (nullValue != value) {
+                                range.set(start, c - 1, value);
+                                return true;
+                            }
+                        } else {
+                            trieValue = this.nullValue;
+                            value = nullValue;
+                            haveValue = true;
+                        }
+                        c = (c + dataBlockLength) & ~dataMask;
+                    } else {
+                        int di = block + (c & dataMask);
+                        int trieValue2 = data.getFromIndex(di);
+                        if (haveValue) {
+                            if (trieValue2 != trieValue) {
+                                if (filter == null ||
+                                        maybeFilterValue(trieValue2, this.nullValue, nullValue,
+                                                filter) != value) {
+                                    range.set(start, c - 1, value);
+                                    return true;
+                                }
+                                trieValue = trieValue2;  // may or may not help
+                            }
+                        } else {
+                            trieValue = trieValue2;
+                            value = maybeFilterValue(trieValue2, this.nullValue, nullValue, filter);
+                            haveValue = true;
+                        }
+                        while ((++c & dataMask) != 0) {
+                            trieValue2 = data.getFromIndex(++di);
+                            if (trieValue2 != trieValue) {
+                                if (filter == null ||
+                                        maybeFilterValue(trieValue2, this.nullValue, nullValue,
+                                                filter) != value) {
+                                    range.set(start, c - 1, value);
+                                    return true;
+                                }
+                                trieValue = trieValue2;  // may or may not help
+                            }
+                        }
+                    }
+                }
+            } while (++i3 < i3BlockLength);
+        } while (c < highStart);
+        assert(haveValue);
+        int di = dataLength - HIGH_VALUE_NEG_DATA_OFFSET;
+        int highValue = data.getFromIndex(di);
+        if (maybeFilterValue(highValue, this.nullValue, nullValue, filter) != value) {
+            --c;
+        } else {
+            c = MAX_UNICODE;
+        }
+        range.set(start, c, value);
+        return true;
+    }
+
+    /**
+     * Writes a representation of the trie to the output stream.
+     * Inverse of {@link #fromBinary}.
+     *
+     * @param os the output stream
+     * @return the number of bytes written
+     * @stable ICU 63
+     */
+    public final int toBinary(OutputStream os) {
+        try {
+            DataOutputStream dos = new DataOutputStream(os);
+
+            // Write the UCPTrieHeader
+            dos.writeInt(0x54726933);  // signature="Tri3"
+            dos.writeChar(  // options
+                ((dataLength & 0xf0000) >> 4) |
+                ((dataNullOffset & 0xf0000) >> 8) |
+                (getType().ordinal() << 6) |
+                getValueWidth().ordinal());
+            dos.writeChar(index.length);
+            dos.writeChar(dataLength);
+            dos.writeChar(index3NullOffset);
+            dos.writeChar(dataNullOffset);
+            dos.writeChar(highStart >> SHIFT_2);  // shiftedHighStart
+            int length = 16;  // sizeof(UCPTrieHeader)
+
+            for (char i : index) { dos.writeChar(i); }
+            length += index.length * 2;
+            length += data.write(dos);
+            return length;
+        } catch (IOException e) {
+            throw new UncheckedIOException(e);
+        }
+    }
+
+    /** @internal */
+    static final int FAST_SHIFT = 6;
+
+    /** Number of entries in a data block for code points below the fast limit. 64=0x40 @internal */
+    static final int FAST_DATA_BLOCK_LENGTH = 1 << FAST_SHIFT;
+
+    /** Mask for getting the lower bits for the in-fast-data-block offset. @internal */
+    private static final int FAST_DATA_MASK = FAST_DATA_BLOCK_LENGTH - 1;
+
+    /** @internal */
+    private static final int SMALL_MAX = 0xfff;
+
+    /**
+     * Offset from dataLength (to be subtracted) for fetching the
+     * value returned for out-of-range code points and ill-formed UTF-8/16.
+     * @internal
+     */
+    private static final int ERROR_VALUE_NEG_DATA_OFFSET = 1;
+    /**
+     * Offset from dataLength (to be subtracted) for fetching the
+     * value returned for code points highStart..U+10FFFF.
+     * @internal
+     */
+    private static final int HIGH_VALUE_NEG_DATA_OFFSET = 2;
+
+    // ucptrie_impl.h
+
+    /** The length of the BMP index table. 1024=0x400 */
+    private static final int BMP_INDEX_LENGTH = 0x10000 >> FAST_SHIFT;
+
+    static final int SMALL_LIMIT = 0x1000;
+    private static final int SMALL_INDEX_LENGTH = SMALL_LIMIT >> FAST_SHIFT;
+
+    /** Shift size for getting the index-3 table offset. */
+    static final int SHIFT_3 = 4;
+
+    /** Shift size for getting the index-2 table offset. */
+    private static final int SHIFT_2 = 5 + SHIFT_3;
+
+    /** Shift size for getting the index-1 table offset. */
+    private static final int SHIFT_1 = 5 + SHIFT_2;
+
+    /**
+     * Difference between two shift sizes,
+     * for getting an index-2 offset from an index-3 offset. 5=9-4
+     */
+    static final int SHIFT_2_3 = SHIFT_2 - SHIFT_3;
+
+    /**
+     * Difference between two shift sizes,
+     * for getting an index-1 offset from an index-2 offset. 5=14-9
+     */
+    static final int SHIFT_1_2 = SHIFT_1 - SHIFT_2;
+
+    /**
+     * Number of index-1 entries for the BMP. (4)
+     * This part of the index-1 table is omitted from the serialized form.
+     */
+    private static final int OMITTED_BMP_INDEX_1_LENGTH = 0x10000 >> SHIFT_1;
+
+    /** Number of entries in an index-2 block. 32=0x20 */
+    static final int INDEX_2_BLOCK_LENGTH = 1 << SHIFT_1_2;
+
+    /** Mask for getting the lower bits for the in-index-2-block offset. */
+    static final int INDEX_2_MASK = INDEX_2_BLOCK_LENGTH - 1;
+
+    /** Number of code points per index-2 table entry. 512=0x200 */
+    static final int CP_PER_INDEX_2_ENTRY = 1 << SHIFT_2;
+
+    /** Number of entries in an index-3 block. 32=0x20 */
+    static final int INDEX_3_BLOCK_LENGTH = 1 << SHIFT_2_3;
+
+    /** Mask for getting the lower bits for the in-index-3-block offset. */
+    private static final int INDEX_3_MASK = INDEX_3_BLOCK_LENGTH - 1;
+
+    /** Number of entries in a small data block. 16=0x10 */
+    static final int SMALL_DATA_BLOCK_LENGTH = 1 << SHIFT_3;
+
+    /** Mask for getting the lower bits for the in-small-data-block offset. */
+    static final int SMALL_DATA_MASK = SMALL_DATA_BLOCK_LENGTH - 1;
+
+    // ucptrie_impl.h: Constants for use with UCPTrieHeader.options.
+    private static final int OPTIONS_DATA_LENGTH_MASK = 0xf000;
+    private static final int OPTIONS_DATA_NULL_OFFSET_MASK = 0xf00;
+    private static final int OPTIONS_RESERVED_MASK = 0x38;
+    private static final int OPTIONS_VALUE_BITS_MASK = 7;
+    /**
+     * Value for index3NullOffset which indicates that there is no index-3 null block.
+     * Bit 15 is unused for this value because this bit is used if the index-3 contains
+     * 18-bit indexes.
+     */
+    static final int NO_INDEX3_NULL_OFFSET = 0x7fff;
+    static final int NO_DATA_NULL_OFFSET = 0xfffff;
+
+    private abstract static class Data {
+        abstract ValueWidth getValueWidth();
+        abstract int getDataLength();
+        abstract int getFromIndex(int index);
+        abstract int write(DataOutputStream dos) throws IOException;
+    }
+
+    private static final class Data16 extends Data {
+        char[] array;
+        Data16(char[] a) { array = a; }
+        @Override ValueWidth getValueWidth() { return ValueWidth.BITS_16; }
+        @Override int getDataLength() { return array.length; }
+        @Override int getFromIndex(int index) { return array[index]; }
+        @Override int write(DataOutputStream dos) throws IOException {
+            for (char v : array) { dos.writeChar(v); }
+            return array.length * 2;
+        }
+    }
+
+    private static final class Data32 extends Data {
+        int[] array;
+        Data32(int[] a) { array = a; }
+        @Override ValueWidth getValueWidth() { return ValueWidth.BITS_32; }
+        @Override int getDataLength() { return array.length; }
+        @Override int getFromIndex(int index) { return array[index]; }
+        @Override int write(DataOutputStream dos) throws IOException {
+            for (int v : array) { dos.writeInt(v); }
+            return array.length * 4;
+        }
+    }
+
+    private static final class Data8 extends Data {
+        byte[] array;
+        Data8(byte[] a) { array = a; }
+        @Override ValueWidth getValueWidth() { return ValueWidth.BITS_8; }
+        @Override int getDataLength() { return array.length; }
+        @Override int getFromIndex(int index) { return array[index] & 0xff; }
+        @Override int write(DataOutputStream dos) throws IOException {
+            for (byte v : array) { dos.writeByte(v); }
+            return array.length;
+        }
+    }
+
+    /** @internal */
+    private final int[] ascii;
+
+    /** @internal */
+    private final char[] index;
+
+    /**
+     * @internal
+     * @deprecated This API is ICU internal only.
+     */
+    @Deprecated
+    protected final Data data;
+    /**
+     * @internal
+     * @deprecated This API is ICU internal only.
+     */
+    @Deprecated
+    protected final int dataLength;
+    /**
+     * Start of the last range which ends at U+10FFFF.
+     * @internal
+     * @deprecated This API is ICU internal only.
+     */
+    @Deprecated
+    protected final int highStart;
+
+    /**
+     * Internal index-3 null block offset.
+     * Set to an impossibly high value (e.g., 0xffff) if there is no dedicated index-3 null block.
+     * @internal
+     */
+    private final int index3NullOffset;
+    /**
+     * Internal data null block offset, not shifted.
+     * Set to an impossibly high value (e.g., 0xfffff) if there is no dedicated data null block.
+     * @internal
+     */
+    private final int dataNullOffset;
+    /** @internal */
+    private final int nullValue;
+
+    /**
+     * @internal
+     * @deprecated This API is ICU internal only.
+     */
+    @Deprecated
+    protected final int fastIndex(int c) {
+        return index[c >> FAST_SHIFT] + (c & FAST_DATA_MASK);
+    }
+
+    /**
+     * @internal
+     * @deprecated This API is ICU internal only.
+     */
+    @Deprecated
+    protected final int smallIndex(Type type, int c) {
+        // Split into two methods to make this part inline-friendly.
+        // In C, this part is a macro.
+        if (c >= highStart) {
+            return dataLength - HIGH_VALUE_NEG_DATA_OFFSET;
+        }
+        return internalSmallIndex(type, c);
+    }
+
+    private final int internalSmallIndex(Type type, int c) {
+        int i1 = c >> SHIFT_1;
+        if (type == Type.FAST) {
+            assert(0xffff < c && c < highStart);
+            i1 += BMP_INDEX_LENGTH - OMITTED_BMP_INDEX_1_LENGTH;
+        } else {
+            assert(0 <= c && c < highStart && highStart > SMALL_LIMIT);
+            i1 += SMALL_INDEX_LENGTH;
+        }
+        int i3Block = index[index[i1] + ((c >> SHIFT_2) & INDEX_2_MASK)];
+        int i3 = (c >> SHIFT_3) & INDEX_3_MASK;
+        int dataBlock;
+        if ((i3Block & 0x8000) == 0) {
+            // 16-bit indexes
+            dataBlock = index[i3Block + i3];
+        } else {
+            // 18-bit indexes stored in groups of 9 entries per 8 indexes.
+            i3Block = (i3Block & 0x7fff) + (i3 & ~7) + (i3 >> 3);
+            i3 &= 7;
+            dataBlock = (index[i3Block++] << (2 + (2 * i3))) & 0x30000;
+            dataBlock |= index[i3Block + i3];
+        }
+        return dataBlock + (c & SMALL_DATA_MASK);
+    }
+
+    /**
+     * @internal
+     * @deprecated This API is ICU internal only.
+     */
+    @Deprecated
+    protected abstract int cpIndex(int c);
+
+    /**
+     * A CodePointTrie with {@link Type#FAST}.
+     *
+     * @stable ICU 63
+     */
+    public abstract static class Fast extends CodePointTrie {
+        private Fast(char[] index, Data data, int highStart,
+                int index3NullOffset, int dataNullOffset) {
+            super(index, data, highStart, index3NullOffset, dataNullOffset);
+        }
+
+        /**
+         * Creates a trie from its binary form.
+         * Same as {@link CodePointTrie#fromBinary(Type, ValueWidth, ByteBuffer)}
+         * with {@link Type#FAST}.
+         *
+         * @param valueWidth selects the number of bits in a data value; this method throws an exception
+         *                  if the valueWidth does not match the binary data;
+         *                  use null to accept any data value width
+         * @param bytes a buffer containing the binary data of a CodePointTrie
+         * @return the trie
+         * @stable ICU 63
+         */
+        public static Fast fromBinary(ValueWidth valueWidth, ByteBuffer bytes) {
+            return (Fast) CodePointTrie.fromBinary(Type.FAST, valueWidth, bytes);
+        }
+
+        /**
+         * @return {@link Type#FAST}
+         * @stable ICU 63
+         */
+        @Override
+        public final Type getType() { return Type.FAST; }
+
+        /**
+         * Returns a trie value for a BMP code point (U+0000..U+FFFF), without range checking.
+         * Can be used to look up a value for a UTF-16 code unit if other parts of
+         * the string processing check for surrogates.
+         *
+         * @param c the input code point, must be U+0000..U+FFFF
+         * @return The BMP code point's trie value.
+         * @stable ICU 63
+         */
+        public abstract int bmpGet(int c);
+
+        /**
+         * Returns a trie value for a supplementary code point (U+10000..U+10FFFF),
+         * without range checking.
+         *
+         * @param c the input code point, must be U+10000..U+10FFFF
+         * @return The supplementary code point's trie value.
+         * @stable ICU 63
+         */
+        public abstract int suppGet(int c);
+
+        /**
+         * @internal
+         * @deprecated This API is ICU internal only.
+         */
+        @Deprecated
+        @Override
+        protected final int cpIndex(int c) {
+            if (c >= 0) {
+                if (c <= 0xffff) {
+                    return fastIndex(c);
+                } else if (c <= 0x10ffff) {
+                    return smallIndex(Type.FAST, c);
+                }
+            }
+            return dataLength - ERROR_VALUE_NEG_DATA_OFFSET;
+        }
+
+        /**
+         * {@inheritDoc}
+         * @stable ICU 63
+         */
+        @Override
+        public final StringIterator stringIterator(CharSequence s, int sIndex) {
+            return new FastStringIterator(s, sIndex);
+        }
+
+        private final class FastStringIterator extends StringIterator {
+            private FastStringIterator(CharSequence s, int sIndex) {
+                super(s, sIndex);
+            }
+
+            @Override
+            public boolean next() {
+                if (sIndex >= s.length()) {
+                    return false;
+                }
+                char lead = s.charAt(sIndex++);
+                c = lead;
+                int dataIndex;
+                if (!Character.isSurrogate(lead)) {
+                    dataIndex = fastIndex(c);
+                } else {
+                    char trail;
+                    if (UTF16Plus.isSurrogateLead(lead) && sIndex < s.length() &&
+                            Character.isLowSurrogate(trail = s.charAt(sIndex))) {
+                        ++sIndex;
+                        c = Character.toCodePoint(lead, trail);
+                        dataIndex = smallIndex(Type.FAST, c);
+                    } else {
+                        dataIndex = dataLength - ERROR_VALUE_NEG_DATA_OFFSET;
+                    }
+                }
+                value = data.getFromIndex(dataIndex);
+                return true;
+            }
+
+            @Override
+            public boolean previous() {
+                if (sIndex <= 0) {
+                    return false;
+                }
+                char trail = s.charAt(--sIndex);
+                c = trail;
+                int dataIndex;
+                if (!Character.isSurrogate(trail)) {
+                    dataIndex = fastIndex(c);
+                } else {
+                    char lead;
+                    if (!UTF16Plus.isSurrogateLead(trail) && sIndex > 0 &&
+                            Character.isHighSurrogate(lead = s.charAt(sIndex - 1))) {
+                        --sIndex;
+                        c = Character.toCodePoint(lead, trail);
+                        dataIndex = smallIndex(Type.FAST, c);
+                    } else {
+                        dataIndex = dataLength - ERROR_VALUE_NEG_DATA_OFFSET;
+                    }
+                }
+                value = data.getFromIndex(dataIndex);
+                return true;
+            }
+        }
+    }
+
+    /**
+     * A CodePointTrie with {@link Type#SMALL}.
+     *
+     * @stable ICU 63
+     */
+    public abstract static class Small extends CodePointTrie {
+        private Small(char[] index, Data data, int highStart,
+                int index3NullOffset, int dataNullOffset) {
+            super(index, data, highStart, index3NullOffset, dataNullOffset);
+        }
+
+        /**
+         * Creates a trie from its binary form.
+         * Same as {@link CodePointTrie#fromBinary(Type, ValueWidth, ByteBuffer)}
+         * with {@link Type#SMALL}.
+         *
+         * @param valueWidth selects the number of bits in a data value; this method throws an exception
+         *                  if the valueWidth does not match the binary data;
+         *                  use null to accept any data value width
+         * @param bytes a buffer containing the binary data of a CodePointTrie
+         * @return the trie
+         * @stable ICU 63
+         */
+        public static Small fromBinary(ValueWidth valueWidth, ByteBuffer bytes) {
+            return (Small) CodePointTrie.fromBinary(Type.SMALL, valueWidth, bytes);
+        }
+
+        /**
+         * @return {@link Type#SMALL}
+         * @stable ICU 63
+         */
+        @Override
+        public final Type getType() { return Type.SMALL; }
+
+        /**
+         * @internal
+         * @deprecated This API is ICU internal only.
+         */
+        @Deprecated
+        @Override
+        protected final int cpIndex(int c) {
+            if (c >= 0) {
+                if (c <= SMALL_MAX) {
+                    return fastIndex(c);
+                } else if (c <= 0x10ffff) {
+                    return smallIndex(Type.SMALL, c);
+                }
+            }
+            return dataLength - ERROR_VALUE_NEG_DATA_OFFSET;
+        }
+
+        /**
+         * {@inheritDoc}
+         * @stable ICU 63
+         */
+        @Override
+        public final StringIterator stringIterator(CharSequence s, int sIndex) {
+            return new SmallStringIterator(s, sIndex);
+        }
+
+        private final class SmallStringIterator extends StringIterator {
+            private SmallStringIterator(CharSequence s, int sIndex) {
+                super(s, sIndex);
+            }
+
+            @Override
+            public boolean next() {
+                if (sIndex >= s.length()) {
+                    return false;
+                }
+                char lead = s.charAt(sIndex++);
+                c = lead;
+                int dataIndex;
+                if (!Character.isSurrogate(lead)) {
+                    dataIndex = cpIndex(c);
+                } else {
+                    char trail;
+                    if (UTF16Plus.isSurrogateLead(lead) && sIndex < s.length() &&
+                            Character.isLowSurrogate(trail = s.charAt(sIndex))) {
+                        ++sIndex;
+                        c = Character.toCodePoint(lead, trail);
+                        dataIndex = smallIndex(Type.SMALL, c);
+                    } else {
+                        dataIndex = dataLength - ERROR_VALUE_NEG_DATA_OFFSET;
+                    }
+                }
+                value = data.getFromIndex(dataIndex);
+                return true;
+            }
+
+            @Override
+            public boolean previous() {
+                if (sIndex <= 0) {
+                    return false;
+                }
+                char trail = s.charAt(--sIndex);
+                c = trail;
+                int dataIndex;
+                if (!Character.isSurrogate(trail)) {
+                    dataIndex = cpIndex(c);
+                } else {
+                    char lead;
+                    if (!UTF16Plus.isSurrogateLead(trail) && sIndex > 0 &&
+                            Character.isHighSurrogate(lead = s.charAt(sIndex - 1))) {
+                        --sIndex;
+                        c = Character.toCodePoint(lead, trail);
+                        dataIndex = smallIndex(Type.SMALL, c);
+                    } else {
+                        dataIndex = dataLength - ERROR_VALUE_NEG_DATA_OFFSET;
+                    }
+                }
+                value = data.getFromIndex(dataIndex);
+                return true;
+            }
+        }
+    }
+
+    /**
+     * A CodePointTrie with {@link Type#FAST} and {@link ValueWidth#BITS_16}.
+     *
+     * @stable ICU 63
+     */
+    public static final class Fast16 extends Fast {
+        private final char[] dataArray;
+
+        Fast16(char[] index, char[] data16, int highStart,
+                int index3NullOffset, int dataNullOffset) {
+            super(index, new Data16(data16), highStart, index3NullOffset, dataNullOffset);
+            this.dataArray = data16;
+        }
+
+        /**
+         * Creates a trie from its binary form.
+         * Same as {@link CodePointTrie#fromBinary(Type, ValueWidth, ByteBuffer)}
+         * with {@link Type#FAST} and {@link ValueWidth#BITS_16}.
+         *
+         * @param bytes a buffer containing the binary data of a CodePointTrie
+         * @return the trie
+         * @stable ICU 63
+         */
+        public static Fast16 fromBinary(ByteBuffer bytes) {
+            return (Fast16) CodePointTrie.fromBinary(Type.FAST, ValueWidth.BITS_16, bytes);
+        }
+
+        /**
+         * {@inheritDoc}
+         * @stable ICU 63
+         */
+        @Override
+        public final int get(int c) {
+            return dataArray[cpIndex(c)];
+        }
+
+        /**
+         * {@inheritDoc}
+         * @stable ICU 63
+         */
+        @Override
+        public final int bmpGet(int c) {
+            assert 0 <= c && c <= 0xffff;
+            return dataArray[fastIndex(c)];
+        }
+
+        /**
+         * {@inheritDoc}
+         * @stable ICU 63
+         */
+        @Override
+        public final int suppGet(int c) {
+            assert 0x10000 <= c && c <= 0x10ffff;
+            return dataArray[smallIndex(Type.FAST, c)];
+        }
+    }
+
+    /**
+     * A CodePointTrie with {@link Type#FAST} and {@link ValueWidth#BITS_32}.
+     *
+     * @stable ICU 63
+     */
+    public static final class Fast32 extends Fast {
+        private final int[] dataArray;
+
+        Fast32(char[] index, int[] data32, int highStart,
+                int index3NullOffset, int dataNullOffset) {
+            super(index, new Data32(data32), highStart, index3NullOffset, dataNullOffset);
+            this.dataArray = data32;
+        }
+
+        /**
+         * Creates a trie from its binary form.
+         * Same as {@link CodePointTrie#fromBinary(Type, ValueWidth, ByteBuffer)}
+         * with {@link Type#FAST} and {@link ValueWidth#BITS_32}.
+         *
+         * @param bytes a buffer containing the binary data of a CodePointTrie
+         * @return the trie
+         * @stable ICU 63
+         */
+        public static Fast32 fromBinary(ByteBuffer bytes) {
+            return (Fast32) CodePointTrie.fromBinary(Type.FAST, ValueWidth.BITS_32, bytes);
+        }
+
+        /**
+         * {@inheritDoc}
+         * @stable ICU 63
+         */
+        @Override
+        public final int get(int c) {
+            return dataArray[cpIndex(c)];
+        }
+
+        /**
+         * {@inheritDoc}
+         * @stable ICU 63
+         */
+        @Override
+        public final int bmpGet(int c) {
+            assert 0 <= c && c <= 0xffff;
+            return dataArray[fastIndex(c)];
+        }
+
+        /**
+         * {@inheritDoc}
+         * @stable ICU 63
+         */
+        @Override
+        public final int suppGet(int c) {
+            assert 0x10000 <= c && c <= 0x10ffff;
+            return dataArray[smallIndex(Type.FAST, c)];
+        }
+    }
+
+    /**
+     * A CodePointTrie with {@link Type#FAST} and {@link ValueWidth#BITS_8}.
+     *
+     * @stable ICU 63
+     */
+    public static final class Fast8 extends Fast {
+        private final byte[] dataArray;
+
+        Fast8(char[] index, byte[] data8, int highStart,
+                int index3NullOffset, int dataNullOffset) {
+            super(index, new Data8(data8), highStart, index3NullOffset, dataNullOffset);
+            this.dataArray = data8;
+        }
+
+        /**
+         * Creates a trie from its binary form.
+         * Same as {@link CodePointTrie#fromBinary(Type, ValueWidth, ByteBuffer)}
+         * with {@link Type#FAST} and {@link ValueWidth#BITS_8}.
+         *
+         * @param bytes a buffer containing the binary data of a CodePointTrie
+         * @return the trie
+         * @stable ICU 63
+         */
+        public static Fast8 fromBinary(ByteBuffer bytes) {
+            return (Fast8) CodePointTrie.fromBinary(Type.FAST, ValueWidth.BITS_8, bytes);
+        }
+
+        /**
+         * {@inheritDoc}
+         * @stable ICU 63
+         */
+        @Override
+        public final int get(int c) {
+            return dataArray[cpIndex(c)] & 0xff;
+        }
+
+        /**
+         * {@inheritDoc}
+         * @stable ICU 63
+         */
+        @Override
+        public final int bmpGet(int c) {
+            assert 0 <= c && c <= 0xffff;
+            return dataArray[fastIndex(c)] & 0xff;
+        }
+
+        /**
+         * {@inheritDoc}
+         * @stable ICU 63
+         */
+        @Override
+        public final int suppGet(int c) {
+            assert 0x10000 <= c && c <= 0x10ffff;
+            return dataArray[smallIndex(Type.FAST, c)] & 0xff;
+        }
+    }
+
+    /**
+     * A CodePointTrie with {@link Type#SMALL} and {@link ValueWidth#BITS_16}.
+     *
+     * @stable ICU 63
+     */
+    public static final class Small16 extends Small {
+        Small16(char[] index, char[] data16, int highStart,
+                int index3NullOffset, int dataNullOffset) {
+            super(index, new Data16(data16), highStart, index3NullOffset, dataNullOffset);
+        }
+
+        /**
+         * Creates a trie from its binary form.
+         * Same as {@link CodePointTrie#fromBinary(Type, ValueWidth, ByteBuffer)}
+         * with {@link Type#SMALL} and {@link ValueWidth#BITS_16}.
+         *
+         * @param bytes a buffer containing the binary data of a CodePointTrie
+         * @return the trie
+         * @stable ICU 63
+         */
+        public static Small16 fromBinary(ByteBuffer bytes) {
+            return (Small16) CodePointTrie.fromBinary(Type.SMALL, ValueWidth.BITS_16, bytes);
+        }
+    }
+
+    /**
+     * A CodePointTrie with {@link Type#SMALL} and {@link ValueWidth#BITS_32}.
+     *
+     * @stable ICU 63
+     */
+    public static final class Small32 extends Small {
+        Small32(char[] index, int[] data32, int highStart,
+                int index3NullOffset, int dataNullOffset) {
+            super(index, new Data32(data32), highStart, index3NullOffset, dataNullOffset);
+        }
+
+        /**
+         * Creates a trie from its binary form.
+         * Same as {@link CodePointTrie#fromBinary(Type, ValueWidth, ByteBuffer)}
+         * with {@link Type#SMALL} and {@link ValueWidth#BITS_32}.
+         *
+         * @param bytes a buffer containing the binary data of a CodePointTrie
+         * @return the trie
+         * @stable ICU 63
+         */
+        public static Small32 fromBinary(ByteBuffer bytes) {
+            return (Small32) CodePointTrie.fromBinary(Type.SMALL, ValueWidth.BITS_32, bytes);
+        }
+    }
+
+    /**
+     * A CodePointTrie with {@link Type#SMALL} and {@link ValueWidth#BITS_8}.
+     *
+     * @stable ICU 63
+     */
+    public static final class Small8 extends Small {
+        Small8(char[] index, byte[] data8, int highStart,
+                int index3NullOffset, int dataNullOffset) {
+            super(index, new Data8(data8), highStart, index3NullOffset, dataNullOffset);
+        }
+
+        /**
+         * Creates a trie from its binary form.
+         * Same as {@link CodePointTrie#fromBinary(Type, ValueWidth, ByteBuffer)}
+         * with {@link Type#SMALL} and {@link ValueWidth#BITS_8}.
+         *
+         * @param bytes a buffer containing the binary data of a CodePointTrie
+         * @return the trie
+         * @stable ICU 63
+         */
+        public static Small8 fromBinary(ByteBuffer bytes) {
+            return (Small8) CodePointTrie.fromBinary(Type.SMALL, ValueWidth.BITS_8, bytes);
+        }
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/icu/util/OutputInt.class b/tests/test_data/std/jdk/internal/icu/util/OutputInt.class
new file mode 100644
index 0000000000000000000000000000000000000000..ab3a2b2fb7e642f5f2548167fdc9fa63458d6c4a
GIT binary patch
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z5iQMVW>)){{r=e>04y=i5TTbM&XJ%`xUBU~E34hJT9>t{JfXi}$NrAcyP0lMoDr_;
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HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/icu/util/OutputInt.java b/tests/test_data/std/jdk/internal/icu/util/OutputInt.java
new file mode 100644
index 00000000..13c65841
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/icu/util/OutputInt.java
@@ -0,0 +1,50 @@
+/*
+ * Copyright (c) 2015, 2020, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/*
+ *******************************************************************************
+ * Copyright (C) 2014, International Business Machines Corporation and
+ * others. All Rights Reserved.
+ *******************************************************************************
+ */
+package jdk.internal.icu.util;
+
+/**
+ * Simple struct-like class for int output parameters.
+ * Like <code>Output&lt;Integer&gt;</code> but without auto-boxing.
+ *
+ * @internal but could become public
+ * deprecated This API is ICU internal only.
+ */
+public class OutputInt {
+
+    /**
+     * The value field.
+     *
+     * @internal
+     * deprecated This API is ICU internal only.
+     */
+    public int value;
+}
diff --git a/tests/test_data/std/jdk/internal/icu/util/VersionInfo.class b/tests/test_data/std/jdk/internal/icu/util/VersionInfo.class
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diff --git a/tests/test_data/std/jdk/internal/icu/util/VersionInfo.java b/tests/test_data/std/jdk/internal/icu/util/VersionInfo.java
new file mode 100644
index 00000000..12228446
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/icu/util/VersionInfo.java
@@ -0,0 +1,203 @@
+/*
+ * Copyright (c) 2005, 2022, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+/*
+ *******************************************************************************
+ * (C) Copyright IBM Corp. and others, 1996-2009 - All Rights Reserved         *
+ *                                                                             *
+ * The original version of this source code and documentation is copyrighted   *
+ * and owned by IBM, These materials are provided under terms of a License     *
+ * Agreement between IBM and Sun. This technology is protected by multiple     *
+ * US and International patents. This notice and attribution to IBM may not    *
+ * to removed.                                                                 *
+ *******************************************************************************
+ */
+
+package jdk.internal.icu.util;
+
+import java.util.HashMap;
+
+/**
+ * Class to store version numbers of the form major.minor.milli.micro.
+ * @author synwee
+ * @stable ICU 2.6
+ */
+public final class VersionInfo
+{
+    // public data members -------------------------------------------------
+
+    /**
+     * Data version string for ICU's internal data.
+     * Used for appending to data path (e.g. icudt43b)
+     * @internal
+     * @deprecated This API is ICU internal only.
+     */
+    @Deprecated
+    public static final String ICU_DATA_VERSION_PATH = "74b";
+
+    // public methods ------------------------------------------------------
+
+    /**
+     * Returns an instance of VersionInfo with the argument version.
+     * @param version version String in the format of "major.minor.milli.micro"
+     *                or "major.minor.milli" or "major.minor" or "major",
+     *                where major, minor, milli, micro are non-negative numbers
+     *                {@literal <=} 255. If the trailing version numbers are
+     *                not specified they are taken as 0s. E.g. Version "3.1" is
+     *                equivalent to "3.1.0.0".
+     * @return an instance of VersionInfo with the argument version.
+     * @exception throws an IllegalArgumentException when the argument version
+     *                is not in the right format
+     * @stable ICU 2.6
+     */
+    public static VersionInfo getInstance(String version)
+    {
+        int length  = version.length();
+        int array[] = {0, 0, 0, 0};
+        int count   = 0;
+        int index   = 0;
+
+        while (count < 4 && index < length) {
+            char c = version.charAt(index);
+            if (c == '.') {
+                count ++;
+            }
+            else {
+                c -= '0';
+                if (c < 0 || c > 9) {
+                    throw new IllegalArgumentException(INVALID_VERSION_NUMBER_);
+                }
+                array[count] *= 10;
+                array[count] += c;
+            }
+            index ++;
+        }
+        if (index != length) {
+            throw new IllegalArgumentException(
+                                               "Invalid version number: String '" + version + "' exceeds version format");
+        }
+        for (int i = 0; i < 4; i ++) {
+            if (array[i] < 0 || array[i] > 255) {
+                throw new IllegalArgumentException(INVALID_VERSION_NUMBER_);
+            }
+        }
+
+        return getInstance(array[0], array[1], array[2], array[3]);
+    }
+
+    /**
+     * Returns an instance of VersionInfo with the argument version.
+     * @param major major version, non-negative number {@literal <=} 255.
+     * @param minor minor version, non-negative number {@literal <=} 255.
+     * @param milli milli version, non-negative number {@literal <=} 255.
+     * @param micro micro version, non-negative number {@literal <=} 255.
+     * @exception throws an IllegalArgumentException when either arguments are
+     *                                     negative or {@literal >} 255
+     * @stable ICU 2.6
+     */
+    public static VersionInfo getInstance(int major, int minor, int milli,
+                                          int micro)
+    {
+        // checks if it is in the hashmap
+        // else
+        if (major < 0 || major > 255 || minor < 0 || minor > 255 ||
+            milli < 0 || milli > 255 || micro < 0 || micro > 255) {
+            throw new IllegalArgumentException(INVALID_VERSION_NUMBER_);
+        }
+        int     version = getInt(major, minor, milli, micro);
+        Integer key     = Integer.valueOf(version);
+        Object  result  = MAP_.get(key);
+        if (result == null) {
+            result = new VersionInfo(version);
+            MAP_.put(key, result);
+        }
+        return (VersionInfo)result;
+    }
+
+    /**
+     * Compares other with this VersionInfo.
+     * @param other VersionInfo to be compared
+     * @return 0 if the argument is a VersionInfo object that has version
+     *           information equal to this object.
+     *           Less than 0 if the argument is a VersionInfo object that has
+     *           version information greater than this object.
+     *           Greater than 0 if the argument is a VersionInfo object that
+     *           has version information less than this object.
+     * @stable ICU 2.6
+     */
+    public int compareTo(VersionInfo other)
+    {
+        // m_version_ is an int, a signed 32-bit integer.
+        // When the major version is >=128, then the version int is negative.
+        // Compare it in two steps to simulate an unsigned-int comparison.
+        // (Alternatively we could turn each int into a long and reset the upper 32 bits.)
+        // Compare the upper bits first, using logical shift right (unsigned).
+        int diff = (m_version_ >>> 1) - (other.m_version_ >>> 1);
+        if (diff != 0) { return diff; }
+        // Compare the remaining bits.
+        return (m_version_ & 1) - (other.m_version_ & 1);
+    }
+
+    // private data members ----------------------------------------------
+
+    /**
+     * Version number stored as a byte for each of the major, minor, milli and
+     * micro numbers in the 32 bit int.
+     * Most significant for the major and the least significant contains the
+     * micro numbers.
+     */
+    private int m_version_;
+    /**
+     * Map of singletons
+     */
+    private static final HashMap<Integer, Object> MAP_ = new HashMap<>();
+    /**
+     * Error statement string
+     */
+    private static final String INVALID_VERSION_NUMBER_ =
+        "Invalid version number: Version number may be negative or greater than 255";
+
+    // private constructor -----------------------------------------------
+
+    /**
+     * Constructor with int
+     * @param compactversion a 32 bit int with each byte representing a number
+     */
+    private VersionInfo(int compactversion)
+    {
+        m_version_ = compactversion;
+    }
+
+    /**
+     * Gets the int from the version numbers
+     * @param major non-negative version number
+     * @param minor non-negativeversion number
+     * @param milli non-negativeversion number
+     * @param micro non-negativeversion number
+     */
+    private static int getInt(int major, int minor, int milli, int micro)
+    {
+        return (major << 24) | (minor << 16) | (milli << 8) | micro;
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/io/JdkConsole.class b/tests/test_data/std/jdk/internal/io/JdkConsole.class
new file mode 100644
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/io/JdkConsole.java b/tests/test_data/std/jdk/internal/io/JdkConsole.java
new file mode 100644
index 00000000..6c911ed6
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/io/JdkConsole.java
@@ -0,0 +1,51 @@
+/*
+ * Copyright (c) 2022, 2024, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package jdk.internal.io;
+
+import java.io.PrintWriter;
+import java.io.Reader;
+import java.nio.charset.Charset;
+import java.util.Locale;
+
+/**
+ * Delegate interface for custom Console implementations.
+ * Methods defined here duplicates the ones in Console class.
+ * Providers should implement jdk.internal.io.JdkConsoleProvider
+ * to instantiate an implementation of this interface.
+ */
+public interface JdkConsole {
+    PrintWriter writer();
+    Reader reader();
+    JdkConsole println(Object obj);
+    JdkConsole print(Object obj);
+    String readln(String prompt);
+    JdkConsole format(Locale locale, String format, Object ... args);
+    String readLine(Locale locale, String format, Object ... args);
+    String readLine();
+    char[] readPassword(Locale locale, String format, Object ... args);
+    char[] readPassword();
+    void flush();
+    Charset charset();
+}
diff --git a/tests/test_data/std/jdk/internal/io/JdkConsoleImpl$1.class b/tests/test_data/std/jdk/internal/io/JdkConsoleImpl$1.class
new file mode 100644
index 0000000000000000000000000000000000000000..4c60b18cbb6b5da591578cf38a8ac386fd787060
GIT binary patch
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diff --git a/tests/test_data/std/jdk/internal/io/JdkConsoleImpl$2.class b/tests/test_data/std/jdk/internal/io/JdkConsoleImpl$2.class
new file mode 100644
index 0000000000000000000000000000000000000000..176904a2c81abe1ee31634aa63d88d43300d6603
GIT binary patch
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/io/JdkConsoleImpl$LineReader.class b/tests/test_data/std/jdk/internal/io/JdkConsoleImpl$LineReader.class
new file mode 100644
index 0000000000000000000000000000000000000000..68faf089623accf08135181ebdb54a39a3860d92
GIT binary patch
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diff --git a/tests/test_data/std/jdk/internal/io/JdkConsoleImpl.class b/tests/test_data/std/jdk/internal/io/JdkConsoleImpl.class
new file mode 100644
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HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/io/JdkConsoleImpl.java b/tests/test_data/std/jdk/internal/io/JdkConsoleImpl.java
new file mode 100644
index 00000000..a1086b24
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/io/JdkConsoleImpl.java
@@ -0,0 +1,407 @@
+/*
+ * Copyright (c) 2022, 2024, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package jdk.internal.io;
+
+import java.io.IOError;
+import java.io.IOException;
+import java.io.FileDescriptor;
+import java.io.FileInputStream;
+import java.io.FileOutputStream;
+import java.io.PrintWriter;
+import java.io.Reader;
+import java.io.Writer;
+import java.nio.charset.Charset;
+import java.util.Arrays;
+import java.util.Formatter;
+import java.util.Locale;
+import java.util.Objects;
+
+import jdk.internal.access.SharedSecrets;
+import sun.nio.cs.StreamDecoder;
+import sun.nio.cs.StreamEncoder;
+
+/**
+ * JdkConsole implementation based on the platform's TTY.
+ */
+public final class JdkConsoleImpl implements JdkConsole {
+    @Override
+    public PrintWriter writer() {
+        return pw;
+    }
+
+    @Override
+    public Reader reader() {
+        return reader;
+    }
+
+    @Override
+    public JdkConsole println(Object obj) {
+        pw.println(obj);
+        // automatic flushing covers println
+        return this;
+    }
+
+    @Override
+    public JdkConsole print(Object obj) {
+        pw.print(obj);
+        pw.flush(); // automatic flushing does not cover print
+        return this;
+    }
+
+    @Override
+    public String readln(String prompt) {
+        String line = null;
+        synchronized (writeLock) {
+            synchronized(readLock) {
+                pw.print(prompt);
+                pw.flush(); // automatic flushing does not cover print
+                try {
+                    char[] ca = readline(false);
+                    if (ca != null)
+                        line = new String(ca);
+                } catch (IOException x) {
+                    throw new IOError(x);
+                }
+            }
+        }
+        return line;
+    }
+
+    @Override
+    public JdkConsole format(Locale locale, String format, Object ... args) {
+        formatter.format(locale, format, args).flush();
+        return this;
+    }
+
+    @Override
+    public String readLine(Locale locale, String format, Object ... args) {
+        String line = null;
+        synchronized (writeLock) {
+            synchronized(readLock) {
+                if (!format.isEmpty())
+                    pw.format(locale, format, args);
+                try {
+                    char[] ca = readline(false);
+                    if (ca != null)
+                        line = new String(ca);
+                } catch (IOException x) {
+                    throw new IOError(x);
+                }
+            }
+        }
+        return line;
+    }
+
+    @Override
+    public String readLine() {
+        return readLine(Locale.getDefault(Locale.Category.FORMAT), "");
+    }
+
+    @Override
+    public char[] readPassword(Locale locale, String format, Object ... args) {
+        char[] passwd = null;
+        synchronized (writeLock) {
+            synchronized(readLock) {
+                installShutdownHook();
+                try {
+                    synchronized(restoreEchoLock) {
+                        restoreEcho = echo(false);
+                    }
+                } catch (IOException x) {
+                    throw new IOError(x);
+                }
+                IOError ioe = null;
+                try {
+                    if (!format.isEmpty())
+                        pw.format(locale, format, args);
+                    passwd = readline(true);
+                } catch (IOException x) {
+                    ioe = new IOError(x);
+                } finally {
+                    try {
+                        synchronized(restoreEchoLock) {
+                            if (restoreEcho) {
+                                restoreEcho = echo(true);
+                            }
+                        }
+                    } catch (IOException x) {
+                        if (ioe == null)
+                            ioe = new IOError(x);
+                        else
+                            ioe.addSuppressed(x);
+                    }
+                    if (ioe != null) {
+                        Arrays.fill(passwd, ' ');
+                        try {
+                            if (reader instanceof LineReader lr) {
+                                lr.zeroOut();
+                            }
+                        } catch (IOException _) {
+                            // ignore
+                        }
+                        throw ioe;
+                    }
+                }
+                pw.println();
+            }
+        }
+        return passwd;
+    }
+
+    private void installShutdownHook() {
+        if (shutdownHookInstalled)
+            return;
+        try {
+            // Add a shutdown hook to restore console's echo state should
+            // it be necessary.
+            SharedSecrets.getJavaLangAccess()
+                    .registerShutdownHook(0 /* shutdown hook invocation order */,
+                            false /* only register if shutdown is not in progress */,
+                            new Runnable() {
+                                public void run() {
+                                    try {
+                                        synchronized(restoreEchoLock) {
+                                            if (restoreEcho) {
+                                                echo(true);
+                                            }
+                                        }
+                                    } catch (IOException _) { }
+                                }
+                            });
+        } catch (IllegalStateException _) {
+            // shutdown is already in progress and readPassword is first used
+            // by a shutdown hook
+        }
+        shutdownHookInstalled = true;
+    }
+
+    @Override
+    public char[] readPassword() {
+        return readPassword(Locale.getDefault(Locale.Category.FORMAT), "");
+    }
+
+    @Override
+    public void flush() {
+        pw.flush();
+    }
+
+    @Override
+    public Charset charset() {
+        return charset;
+    }
+
+    private final Charset charset;
+    private final Object readLock;
+    private final Object writeLock;
+    // Must not block while holding this. It is used in the shutdown hook.
+    private final Object restoreEchoLock;
+    private final Reader reader;
+    private final Writer out;
+    private final PrintWriter pw;
+    private final Formatter formatter;
+    private char[] rcb;
+    private boolean restoreEcho;
+    private boolean shutdownHookInstalled;
+
+    private char[] readline(boolean zeroOut) throws IOException {
+        int len = reader.read(rcb, 0, rcb.length);
+        if (len < 0)
+            return null;  //EOL
+        if (rcb[len-1] == '\r')
+            len--;        //remove CR at end;
+        else if (rcb[len-1] == '\n') {
+            len--;        //remove LF at end;
+            if (len > 0 && rcb[len-1] == '\r')
+                len--;    //remove the CR, if there is one
+        }
+        char[] b = new char[len];
+        if (len > 0) {
+            System.arraycopy(rcb, 0, b, 0, len);
+            if (zeroOut) {
+                Arrays.fill(rcb, 0, len, ' ');
+                if (reader instanceof LineReader lr) {
+                    lr.zeroOut();
+                }
+            }
+        }
+        return b;
+    }
+
+    private char[] grow() {
+        assert Thread.holdsLock(readLock);
+        char[] t = new char[rcb.length * 2];
+        System.arraycopy(rcb, 0, t, 0, rcb.length);
+        rcb = t;
+        return rcb;
+    }
+
+    /*
+     * Sets the console echo status to {@code on} and returns the previous
+     * console on/off status.
+     * @param on    the echo status to set to. {@code true} for echo on and
+     *              {@code false} for echo off
+     * @return true if the previous console echo status is on
+     */
+    private static native boolean echo(boolean on) throws IOException;
+
+    class LineReader extends Reader {
+        private final Reader in;
+        private final char[] cb;
+        private int nChars, nextChar;
+        boolean leftoverLF;
+        LineReader(Reader in) {
+            this.in = in;
+            cb = new char[1024];
+            nextChar = nChars = 0;
+            leftoverLF = false;
+        }
+        public void zeroOut() throws IOException {
+            if (in instanceof StreamDecoder sd) {
+                sd.fillZeroToPosition();
+            }
+        }
+        public void close () {}
+        public boolean ready() throws IOException {
+            //in.ready synchronizes on readLock already
+            return in.ready();
+        }
+
+        public int read(char[] cbuf, int offset, int length)
+                throws IOException
+        {
+            int off = offset;
+            int end = offset + length;
+            if (offset < 0 || offset > cbuf.length || length < 0 ||
+                    end < 0 || end > cbuf.length) {
+                throw new IndexOutOfBoundsException();
+            }
+            synchronized(readLock) {
+                boolean eof = false;
+                char c;
+                for (;;) {
+                    if (nextChar >= nChars) {   //fill
+                        int n;
+                        do {
+                            n = in.read(cb, 0, cb.length);
+                        } while (n == 0);
+                        if (n > 0) {
+                            nChars = n;
+                            nextChar = 0;
+                            if (n < cb.length &&
+                                    cb[n-1] != '\n' && cb[n-1] != '\r') {
+                                /*
+                                 * we're in canonical mode so each "fill" should
+                                 * come back with an eol. if there is no lf or nl at
+                                 * the end of returned bytes we reached an eof.
+                                 */
+                                eof = true;
+                            }
+                        } else { /*EOF*/
+                            if (off - offset == 0)
+                                return -1;
+                            return off - offset;
+                        }
+                    }
+                    if (leftoverLF && cbuf == rcb && cb[nextChar] == '\n') {
+                        /*
+                         * if invoked by our readline, skip the leftover, otherwise
+                         * return the LF.
+                         */
+                        nextChar++;
+                    }
+                    leftoverLF = false;
+                    while (nextChar < nChars) {
+                        c = cbuf[off++] = cb[nextChar];
+                        cb[nextChar++] = 0;
+                        if (c == '\n') {
+                            return off - offset;
+                        } else if (c == '\r') {
+                            if (off == end) {
+                                /* no space left even the next is LF, so return
+                                 * whatever we have if the invoker is not our
+                                 * readLine()
+                                 */
+                                if (cbuf == rcb) {
+                                    cbuf = grow();
+                                } else {
+                                    leftoverLF = true;
+                                    return off - offset;
+                                }
+                            }
+                            if (nextChar == nChars && in.ready()) {
+                                /*
+                                 * we have a CR and we reached the end of
+                                 * the read in buffer, fill to make sure we
+                                 * don't miss a LF, if there is one, it's possible
+                                 * that it got cut off during last round reading
+                                 * simply because the read in buffer was full.
+                                 */
+                                nChars = in.read(cb, 0, cb.length);
+                                nextChar = 0;
+                            }
+                            if (nextChar < nChars && cb[nextChar] == '\n') {
+                                cbuf[off++] = '\n';
+                                nextChar++;
+                            }
+                            return off - offset;
+                        } else if (off == end) {
+                            if (cbuf == rcb) {
+                                cbuf = grow();
+                                end = cbuf.length;
+                            } else {
+                                return off - offset;
+                            }
+                        }
+                    }
+                    if (eof)
+                        return off - offset;
+                }
+            }
+        }
+    }
+
+    public JdkConsoleImpl(Charset charset) {
+        Objects.requireNonNull(charset);
+        this.charset = charset;
+        readLock = new Object();
+        writeLock = new Object();
+        restoreEchoLock = new Object();
+        out = StreamEncoder.forOutputStreamWriter(
+                new FileOutputStream(FileDescriptor.out),
+                writeLock,
+                charset);
+        pw = new PrintWriter(out, true) {
+            public void close() {
+            }
+        };
+        formatter = new Formatter(out);
+        reader = new LineReader(StreamDecoder.forInputStreamReader(
+                new FileInputStream(FileDescriptor.in),
+                readLock,
+                charset));
+        rcb = new char[1024];
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/io/JdkConsoleProvider.class b/tests/test_data/std/jdk/internal/io/JdkConsoleProvider.class
new file mode 100644
index 0000000000000000000000000000000000000000..d2946d6c12d96d0069c692cb683874f543fc01c0
GIT binary patch
literal 316
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zV>}p7FEf*Q^S$}{{@ekGa1o$IxUb3;liCTZxnk0=QMrnYUK=GQ)@)@dY=C3JRmHcQ
zDXy0+d#^;{2zPNZ9L&?#d@{`z&v7!%$5}j2ll)~cP6*fO@5;<ssh531ul9Cay9HMp
z(ZMO<(i4O~1fddyplARHPY-X6i}qy22e)hCSk!3$G5w$2pX$!c#uj2IYs;IzvBDa!
eO&}cke-LhQg0|PdS1oivK6MvohuQg|*V_XSI#(0`

literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/io/JdkConsoleProvider.java b/tests/test_data/std/jdk/internal/io/JdkConsoleProvider.java
new file mode 100644
index 00000000..26e59c84
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/io/JdkConsoleProvider.java
@@ -0,0 +1,44 @@
+/*
+ * Copyright (c) 2022, 2023, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package jdk.internal.io;
+
+import java.nio.charset.Charset;
+
+/**
+ * Service provider interface for JdkConsole implementations.
+ */
+public interface JdkConsoleProvider {
+    /**
+     * The module name of the JdkConsole default provider.
+     */
+    String DEFAULT_PROVIDER_MODULE_NAME = "jdk.internal.le";
+
+    /**
+     * {@return the Console instance, or {@code null} if not available}
+     * @param isTTY indicates if the jvm is attached to a terminal
+     * @param charset charset of the platform console
+     */
+    JdkConsole console(boolean isTTY, Charset charset);
+}
diff --git a/tests/test_data/std/jdk/internal/javac/NoPreview.class b/tests/test_data/std/jdk/internal/javac/NoPreview.class
new file mode 100644
index 0000000000000000000000000000000000000000..971a4454a55089b3a027f9303b347990b2f1b625
GIT binary patch
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zHFBfjm~!o)&TzhRxl)DZS`^ClmMudgEoNm-Jt2vqwPaq|L57oLrnH#QlbDL3q}AY*
z;VfJW&v-c^eZx?jb2&56%k{ZH(u9=G7Vl)j^~WH)i@FR=KkBDhGVrq~F^t}Q5E|Es
zJ^#VG4Qw##4nosZv**~9i}mz`w1Jz)8g}QONL)yfFYJx|&`Z+}1H*<{HS+;L1<s#t
jV$0NPvu~KQ<_qeCZR}WSS=qJHwz6ks9|tx@IK<H}3$J`Z

literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/javac/NoPreview.java b/tests/test_data/std/jdk/internal/javac/NoPreview.java
new file mode 100644
index 00000000..51a06cd2
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/javac/NoPreview.java
@@ -0,0 +1,49 @@
+/*
+ * Copyright (c) 2021, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package jdk.internal.javac;
+
+import java.lang.annotation.ElementType;
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+import java.lang.annotation.Target;
+
+/**
+ * The element annotated with this annotation should not be marked as a preview element.
+ *
+ * Note this internal annotation is handled specially by the javac compiler.
+ * To work properly with {@code --release older-release}, it requires special
+ * handling in {@code make/langtools/src/classes/build/tools/symbolgenerator/CreateSymbols.java}
+ * and {@code src/jdk.compiler/share/classes/com/sun/tools/javac/jvm/ClassReader.java}.
+ *
+ */
+@Target({ElementType.METHOD,
+         ElementType.CONSTRUCTOR,
+         ElementType.FIELD,
+         ElementType.PACKAGE,
+         ElementType.MODULE,
+         ElementType.TYPE})
+@Retention(RetentionPolicy.CLASS)
+public @interface NoPreview {
+}
diff --git a/tests/test_data/std/jdk/internal/javac/ParticipatesInPreview.class b/tests/test_data/std/jdk/internal/javac/ParticipatesInPreview.class
new file mode 100644
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GIT binary patch
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diff --git a/tests/test_data/std/jdk/internal/javac/ParticipatesInPreview.java b/tests/test_data/std/jdk/internal/javac/ParticipatesInPreview.java
new file mode 100644
index 00000000..c291ca9f
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/javac/ParticipatesInPreview.java
@@ -0,0 +1,39 @@
+/*
+ * Copyright (c) 2022, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package jdk.internal.javac;
+
+import java.lang.annotation.ElementType;
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+import java.lang.annotation.Target;
+
+/**
+ * Indicates, when declared on a module declaration, that the module participates
+ * in preview features and therefore does not need to be compiled with "--enable-preview".
+ */
+@Target(ElementType.MODULE)
+@Retention(RetentionPolicy.CLASS)
+public @interface ParticipatesInPreview {
+}
diff --git a/tests/test_data/std/jdk/internal/javac/PreviewFeature$Feature.class b/tests/test_data/std/jdk/internal/javac/PreviewFeature$Feature.class
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/javac/PreviewFeature$JEP.class b/tests/test_data/std/jdk/internal/javac/PreviewFeature$JEP.class
new file mode 100644
index 0000000000000000000000000000000000000000..c49f3f8c4c7ba9d7f27f4881ca735b39a5fac247
GIT binary patch
literal 628
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/javac/PreviewFeature.class b/tests/test_data/std/jdk/internal/javac/PreviewFeature.class
new file mode 100644
index 0000000000000000000000000000000000000000..326394218a80b74baf47a1ddac858ef58f6a6b95
GIT binary patch
literal 769
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/javac/PreviewFeature.java b/tests/test_data/std/jdk/internal/javac/PreviewFeature.java
new file mode 100644
index 00000000..05049eff
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/javac/PreviewFeature.java
@@ -0,0 +1,106 @@
+/*
+ * Copyright (c) 2019, 2024, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package jdk.internal.javac;
+
+import java.lang.annotation.*;
+
+/**
+ * Indicates the API declaration in question is associated with a
+ * <em>preview feature</em>. See JEP 12: "Preview Language and VM
+ * Features" (https://openjdk.org/jeps/12).
+ *
+ * Note this internal annotation is handled specially by the javac compiler.
+ * To work properly with {@code --release older-release}, it requires special
+ * handling in {@code make/langtools/src/classes/build/tools/symbolgenerator/CreateSymbols.java}
+ * and {@code src/jdk.compiler/share/classes/com/sun/tools/javac/jvm/ClassReader.java}.
+ *
+ * @since 14
+ */
+// Match the meaningful targets of java.lang.Deprecated, omit local
+// variables and parameter declarations
+@Target({ElementType.METHOD,
+         ElementType.CONSTRUCTOR,
+         ElementType.FIELD,
+         ElementType.PACKAGE,
+         ElementType.MODULE,
+         ElementType.TYPE})
+ // CLASS retention will hopefully be sufficient for the purposes at hand
+@Retention(RetentionPolicy.CLASS)
+// *Not* @Documented
+public @interface PreviewFeature {
+    /**
+     * Name of the preview feature the annotated API is associated
+     * with.
+     */
+    public Feature feature();
+
+    public boolean reflective() default false;
+
+    /**
+     * Enum of preview features in the current release.
+     * Values should be annotated with the feature's {@code JEP}.
+     */
+    public enum Feature {
+        // not used, but required for interim javac to not warn.
+        VIRTUAL_THREADS,
+        FOREIGN,
+        @JEP(number=459, title="String Templates", status="Second Preview")
+        STRING_TEMPLATES,
+        @JEP(number=477, title="Implicitly Declared Classes and Instance Main Methods", status="Third Preview")
+        IMPLICIT_CLASSES,
+        @JEP(number=481, title="Scoped Values", status="Third Preview")
+        SCOPED_VALUES,
+        @JEP(number=480, title="Structured Concurrency", status="Third Preview")
+        STRUCTURED_CONCURRENCY,
+        @JEP(number=466, title="ClassFile API", status="Second Preview")
+        CLASSFILE_API,
+        @JEP(number=473, title="Stream Gatherers", status="Second Preview")
+        STREAM_GATHERERS,
+        @JEP(number=476, title="Module Import Declarations", status="Preview")
+        MODULE_IMPORTS,
+        LANGUAGE_MODEL,
+        /**
+         * A key for testing.
+         */
+        @JEP(number=2_147_483_647, title="Test Feature")
+        TEST,
+        ;
+    }
+
+    /**
+     * Annotation identifying the JEP associated with a preview feature.
+     */
+    @Target(ElementType.FIELD)
+    @Retention(RetentionPolicy.CLASS)
+    @interface JEP {
+        /** JEP number */
+        int number() default 0;
+        /** JEP title in plain text */
+        String title();
+        /** JEP status such as "Preview", "Second Preview", etc */
+        String status() default "Preview";
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/javac/Restricted.class b/tests/test_data/std/jdk/internal/javac/Restricted.class
new file mode 100644
index 0000000000000000000000000000000000000000..0c6a44a891331c73b2864a182a0d33a7de80b6de
GIT binary patch
literal 392
zcmaiwJ5Iwu5QhH=Bn#n@P$Gmt6e-yQP$4iP5+TSK8mf&miq>q_$X-Xv)hIXshe8=s
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/javac/Restricted.java b/tests/test_data/std/jdk/internal/javac/Restricted.java
new file mode 100644
index 00000000..c6b44dc7
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/javac/Restricted.java
@@ -0,0 +1,39 @@
+/*
+ * Copyright (c) 2023, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package jdk.internal.javac;
+
+import java.lang.annotation.ElementType;
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+import java.lang.annotation.Target;
+
+/**
+ * This annotation is used to mark <em>restricted</em> methods in the Java SE API
+ * (e.g. {@link java.lang.foreign.MemorySegment#reinterpret(long)}).
+ */
+@Target({ElementType.METHOD})
+@Retention(RetentionPolicy.RUNTIME)
+public @interface Restricted {
+}
diff --git a/tests/test_data/std/jdk/internal/jimage/BasicImageReader$1.class b/tests/test_data/std/jdk/internal/jimage/BasicImageReader$1.class
new file mode 100644
index 0000000000000000000000000000000000000000..df519673d7c26e5c06695b41c61a60ebb2a73417
GIT binary patch
literal 1283
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literal 0
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diff --git a/tests/test_data/std/jdk/internal/jimage/BasicImageReader$2.class b/tests/test_data/std/jdk/internal/jimage/BasicImageReader$2.class
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GIT binary patch
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/jimage/BasicImageReader.class b/tests/test_data/std/jdk/internal/jimage/BasicImageReader.class
new file mode 100644
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diff --git a/tests/test_data/std/jdk/internal/jimage/BasicImageReader.java b/tests/test_data/std/jdk/internal/jimage/BasicImageReader.java
new file mode 100644
index 00000000..07879353
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/jimage/BasicImageReader.java
@@ -0,0 +1,467 @@
+/*
+ * Copyright (c) 2014, 2021, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package jdk.internal.jimage;
+
+import java.io.ByteArrayInputStream;
+import java.io.IOException;
+import java.io.InputStream;
+import java.lang.reflect.InvocationTargetException;
+import java.lang.reflect.Method;
+import java.nio.ByteBuffer;
+import java.nio.ByteOrder;
+import java.nio.IntBuffer;
+import java.nio.channels.FileChannel;
+import java.nio.file.Path;
+import java.nio.file.StandardOpenOption;
+import java.security.AccessController;
+import java.security.PrivilegedAction;
+import java.util.Objects;
+import java.util.stream.IntStream;
+import jdk.internal.jimage.decompressor.Decompressor;
+
+/**
+ * @implNote This class needs to maintain JDK 8 source compatibility.
+ *
+ * It is used internally in the JDK to implement jimage/jrtfs access,
+ * but also compiled and delivered as part of the jrtfs.jar to support access
+ * to the jimage file provided by the shipped JDK by tools running on JDK 8.
+ */
+public class BasicImageReader implements AutoCloseable {
+    @SuppressWarnings("removal")
+    private static boolean isSystemProperty(String key, String value, String def) {
+        // No lambdas during bootstrap
+        return AccessController.doPrivileged(
+            new PrivilegedAction<Boolean>() {
+                @Override
+                public Boolean run() {
+                    return value.equals(System.getProperty(key, def));
+                }
+            });
+    }
+
+    private static final boolean IS_64_BIT =
+            isSystemProperty("sun.arch.data.model", "64", "32");
+    private static final boolean USE_JVM_MAP =
+            isSystemProperty("jdk.image.use.jvm.map", "true", "true");
+    private static final boolean MAP_ALL =
+            isSystemProperty("jdk.image.map.all", "true", IS_64_BIT ? "true" : "false");
+
+    private final Path imagePath;
+    private final ByteOrder byteOrder;
+    private final String name;
+    private final ByteBuffer memoryMap;
+    private final FileChannel channel;
+    private final ImageHeader header;
+    private final long indexSize;
+    private final IntBuffer redirect;
+    private final IntBuffer offsets;
+    private final ByteBuffer locations;
+    private final ByteBuffer strings;
+    private final ImageStringsReader stringsReader;
+    private final Decompressor decompressor;
+
+    @SuppressWarnings({ "removal", "this-escape" })
+    protected BasicImageReader(Path path, ByteOrder byteOrder)
+            throws IOException {
+        this.imagePath = Objects.requireNonNull(path);
+        this.byteOrder = Objects.requireNonNull(byteOrder);
+        this.name = this.imagePath.toString();
+
+        ByteBuffer map;
+
+        if (USE_JVM_MAP && BasicImageReader.class.getClassLoader() == null) {
+            // Check to see if the jvm has opened the file using libjimage
+            // native entry when loading the image for this runtime
+            map = NativeImageBuffer.getNativeMap(name);
+         } else {
+            map = null;
+        }
+
+        // Open the file only if no memory map yet or is 32 bit jvm
+        if (map != null && MAP_ALL) {
+            channel = null;
+        } else {
+            channel = FileChannel.open(imagePath, StandardOpenOption.READ);
+            // No lambdas during bootstrap
+            AccessController.doPrivileged(new PrivilegedAction<Void>() {
+                @Override
+                public Void run() {
+                    if (BasicImageReader.class.getClassLoader() == null) {
+                        try {
+                            Class<?> fileChannelImpl =
+                                Class.forName("sun.nio.ch.FileChannelImpl");
+                            Method setUninterruptible =
+                                    fileChannelImpl.getMethod("setUninterruptible");
+                            setUninterruptible.invoke(channel);
+                        } catch (ClassNotFoundException |
+                                 NoSuchMethodException |
+                                 IllegalAccessException |
+                                 InvocationTargetException ex) {
+                            // fall thru - will only happen on JDK-8 systems where this code
+                            // is only used by tools using jrt-fs (non-critical.)
+                        }
+                    }
+
+                    return null;
+                }
+            });
+        }
+
+        // If no memory map yet and 64 bit jvm then memory map entire file
+        if (MAP_ALL && map == null) {
+            map = channel.map(FileChannel.MapMode.READ_ONLY, 0, channel.size());
+        }
+
+        // Assume we have a memory map to read image file header
+        ByteBuffer headerBuffer = map;
+        int headerSize = ImageHeader.getHeaderSize();
+
+        // If no memory map then read header from image file
+        if (headerBuffer == null) {
+            headerBuffer = ByteBuffer.allocateDirect(headerSize);
+            if (channel.read(headerBuffer, 0L) == headerSize) {
+                headerBuffer.rewind();
+            } else {
+                throw new IOException("\"" + name + "\" is not an image file");
+            }
+        } else if (headerBuffer.capacity() < headerSize) {
+            throw new IOException("\"" + name + "\" is not an image file");
+        }
+
+        // Interpret the image file header
+        header = readHeader(intBuffer(headerBuffer, 0, headerSize));
+        indexSize = header.getIndexSize();
+
+        // If no memory map yet then must be 32 bit jvm not previously mapped
+        if (map == null) {
+            // Just map the image index
+            map = channel.map(FileChannel.MapMode.READ_ONLY, 0, indexSize);
+        }
+
+        memoryMap = map.asReadOnlyBuffer();
+
+        // Interpret the image index
+        if (memoryMap.capacity() < indexSize) {
+            throw new IOException("The image file \"" + name + "\" is corrupted");
+        }
+        redirect = intBuffer(memoryMap, header.getRedirectOffset(), header.getRedirectSize());
+        offsets = intBuffer(memoryMap, header.getOffsetsOffset(), header.getOffsetsSize());
+        locations = slice(memoryMap, header.getLocationsOffset(), header.getLocationsSize());
+        strings = slice(memoryMap, header.getStringsOffset(), header.getStringsSize());
+
+        stringsReader = new ImageStringsReader(this);
+        decompressor = new Decompressor();
+    }
+
+    protected BasicImageReader(Path imagePath) throws IOException {
+        this(imagePath, ByteOrder.nativeOrder());
+    }
+
+    public static BasicImageReader open(Path imagePath) throws IOException {
+        return new BasicImageReader(imagePath, ByteOrder.nativeOrder());
+    }
+
+    public ImageHeader getHeader() {
+        return header;
+    }
+
+    private ImageHeader readHeader(IntBuffer buffer) throws IOException {
+        ImageHeader result = ImageHeader.readFrom(buffer);
+
+        if (result.getMagic() != ImageHeader.MAGIC) {
+            throw new IOException("\"" + name + "\" is not an image file");
+        }
+
+        if (result.getMajorVersion() != ImageHeader.MAJOR_VERSION ||
+            result.getMinorVersion() != ImageHeader.MINOR_VERSION) {
+            throw new IOException("The image file \"" + name + "\" is not " +
+                "the correct version. Major: " + result.getMajorVersion() +
+                ". Minor: " + result.getMinorVersion());
+        }
+
+        return result;
+    }
+
+    private static ByteBuffer slice(ByteBuffer buffer, int position, int capacity) {
+        // Note that this is the only limit and position manipulation of
+        // BasicImageReader private ByteBuffers.  The synchronize could be avoided
+        // by cloning the buffer to make a local copy, but at the cost of creating
+        // a new object.
+        synchronized(buffer) {
+            buffer.limit(position + capacity);
+            buffer.position(position);
+            return buffer.slice();
+        }
+    }
+
+    private IntBuffer intBuffer(ByteBuffer buffer, int offset, int size) {
+        return slice(buffer, offset, size).order(byteOrder).asIntBuffer();
+    }
+
+    public static void releaseByteBuffer(ByteBuffer buffer) {
+        Objects.requireNonNull(buffer);
+
+        if (!MAP_ALL) {
+            ImageBufferCache.releaseBuffer(buffer);
+        }
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public ByteOrder getByteOrder() {
+        return byteOrder;
+    }
+
+    public Path getImagePath() {
+        return imagePath;
+    }
+
+    @Override
+    public void close() throws IOException {
+        if (channel != null) {
+            channel.close();
+        }
+    }
+
+    public ImageStringsReader getStrings() {
+        return stringsReader;
+    }
+
+    public ImageLocation findLocation(String module, String name) {
+        int index = getLocationIndex(module, name);
+        if (index < 0) {
+            return null;
+        }
+        long[] attributes = getAttributes(offsets.get(index));
+        if (!ImageLocation.verify(module, name, attributes, stringsReader)) {
+            return null;
+        }
+        return new ImageLocation(attributes, stringsReader);
+    }
+
+    public ImageLocation findLocation(String name) {
+        int index = getLocationIndex(name);
+        if (index < 0) {
+            return null;
+        }
+        long[] attributes = getAttributes(offsets.get(index));
+        if (!ImageLocation.verify(name, attributes, stringsReader)) {
+            return null;
+        }
+        return new ImageLocation(attributes, stringsReader);
+    }
+
+    public boolean verifyLocation(String module, String name) {
+        int index = getLocationIndex(module, name);
+        if (index < 0) {
+            return false;
+        }
+        int locationOffset = offsets.get(index);
+        return ImageLocation.verify(module, name, locations, locationOffset, stringsReader);
+    }
+
+    // Details of the algorithm used here can be found in
+    // jdk.tools.jlink.internal.PerfectHashBuilder.
+    public int getLocationIndex(String name) {
+        int count = header.getTableLength();
+        int index = redirect.get(ImageStringsReader.hashCode(name) % count);
+        if (index < 0) {
+            // index is twos complement of location attributes index.
+            return -index - 1;
+        } else if (index > 0) {
+            // index is hash seed needed to compute location attributes index.
+            return ImageStringsReader.hashCode(name, index) % count;
+        } else {
+            // No entry.
+            return -1;
+        }
+    }
+
+    private int getLocationIndex(String module, String name) {
+        int count = header.getTableLength();
+        int index = redirect.get(ImageStringsReader.hashCode(module, name) % count);
+        if (index < 0) {
+            // index is twos complement of location attributes index.
+            return -index - 1;
+        } else if (index > 0) {
+            // index is hash seed needed to compute location attributes index.
+            return ImageStringsReader.hashCode(module, name, index) % count;
+        } else {
+            // No entry.
+            return -1;
+        }
+    }
+
+    public String[] getEntryNames() {
+        int[] attributeOffsets = new int[offsets.capacity()];
+        offsets.get(attributeOffsets);
+        return IntStream.of(attributeOffsets)
+                        .filter(o -> o != 0)
+                        .mapToObj(o -> ImageLocation.readFrom(this, o).getFullName())
+                        .sorted()
+                        .toArray(String[]::new);
+    }
+
+    ImageLocation getLocation(int offset) {
+        return ImageLocation.readFrom(this, offset);
+    }
+
+    public long[] getAttributes(int offset) {
+        if (offset < 0 || offset >= locations.limit()) {
+            throw new IndexOutOfBoundsException("offset");
+        }
+        return ImageLocation.decompress(locations, offset);
+    }
+
+    public String getString(int offset) {
+        if (offset < 0 || offset >= strings.limit()) {
+            throw new IndexOutOfBoundsException("offset");
+        }
+        return ImageStringsReader.stringFromByteBuffer(strings, offset);
+    }
+
+    public int match(int offset, String string, int stringOffset) {
+        if (offset < 0 || offset >= strings.limit()) {
+            throw new IndexOutOfBoundsException("offset");
+        }
+        return ImageStringsReader.stringFromByteBufferMatches(strings, offset, string, stringOffset);
+    }
+
+    private byte[] getBufferBytes(ByteBuffer buffer) {
+        Objects.requireNonNull(buffer);
+        byte[] bytes = new byte[buffer.limit()];
+        buffer.get(bytes);
+
+        return bytes;
+    }
+
+    private ByteBuffer readBuffer(long offset, long size) {
+        if (offset < 0 || Integer.MAX_VALUE <= offset) {
+            throw new IndexOutOfBoundsException("Bad offset: " + offset);
+        }
+
+        if (size < 0 || Integer.MAX_VALUE <= size) {
+            throw new IndexOutOfBoundsException("Bad size: " + size);
+        }
+
+        if (MAP_ALL) {
+            ByteBuffer buffer = slice(memoryMap, (int)offset, (int)size);
+            buffer.order(ByteOrder.BIG_ENDIAN);
+
+            return buffer;
+        } else {
+            if (channel == null) {
+                throw new InternalError("Image file channel not open");
+            }
+
+            ByteBuffer buffer = ImageBufferCache.getBuffer(size);
+            int read;
+            try {
+                read = channel.read(buffer, offset);
+                buffer.rewind();
+            } catch (IOException ex) {
+                ImageBufferCache.releaseBuffer(buffer);
+                throw new RuntimeException(ex);
+            }
+
+            if (read != size) {
+                ImageBufferCache.releaseBuffer(buffer);
+                throw new RuntimeException("Short read: " + read +
+                                           " instead of " + size + " bytes");
+            }
+
+            return buffer;
+        }
+    }
+
+    public byte[] getResource(String name) {
+        Objects.requireNonNull(name);
+        ImageLocation location = findLocation(name);
+
+        return location != null ? getResource(location) : null;
+    }
+
+    public byte[] getResource(ImageLocation loc) {
+        ByteBuffer buffer = getResourceBuffer(loc);
+
+        if (buffer != null) {
+            byte[] bytes = getBufferBytes(buffer);
+            ImageBufferCache.releaseBuffer(buffer);
+
+            return bytes;
+        }
+
+        return null;
+    }
+
+    public ByteBuffer getResourceBuffer(ImageLocation loc) {
+        Objects.requireNonNull(loc);
+        long offset = loc.getContentOffset() + indexSize;
+        long compressedSize = loc.getCompressedSize();
+        long uncompressedSize = loc.getUncompressedSize();
+
+        if (compressedSize < 0 || Integer.MAX_VALUE < compressedSize) {
+            throw new IndexOutOfBoundsException(
+                "Bad compressed size: " + compressedSize);
+        }
+
+        if (uncompressedSize < 0 || Integer.MAX_VALUE < uncompressedSize) {
+            throw new IndexOutOfBoundsException(
+                "Bad uncompressed size: " + uncompressedSize);
+        }
+
+        if (compressedSize == 0) {
+            return readBuffer(offset, uncompressedSize);
+        } else {
+            ByteBuffer buffer = readBuffer(offset, compressedSize);
+
+            if (buffer != null) {
+                byte[] bytesIn = getBufferBytes(buffer);
+                ImageBufferCache.releaseBuffer(buffer);
+                byte[] bytesOut;
+
+                try {
+                    bytesOut = decompressor.decompressResource(byteOrder,
+                            (int strOffset) -> getString(strOffset), bytesIn);
+                } catch (IOException ex) {
+                    throw new RuntimeException(ex);
+                }
+
+                return ByteBuffer.wrap(bytesOut);
+            }
+        }
+
+        return null;
+    }
+
+    public InputStream getResourceStream(ImageLocation loc) {
+        Objects.requireNonNull(loc);
+        byte[] bytes = getResource(loc);
+
+        return new ByteArrayInputStream(bytes);
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/jimage/ImageBufferCache$1.class b/tests/test_data/std/jdk/internal/jimage/ImageBufferCache$1.class
new file mode 100644
index 0000000000000000000000000000000000000000..9e4f0e3c98162ecaef696d60b74588111bef99b6
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diff --git a/tests/test_data/std/jdk/internal/jimage/ImageBufferCache$2.class b/tests/test_data/std/jdk/internal/jimage/ImageBufferCache$2.class
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diff --git a/tests/test_data/std/jdk/internal/jimage/ImageBufferCache.class b/tests/test_data/std/jdk/internal/jimage/ImageBufferCache.class
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diff --git a/tests/test_data/std/jdk/internal/jimage/ImageBufferCache.java b/tests/test_data/std/jdk/internal/jimage/ImageBufferCache.java
new file mode 100644
index 00000000..c2cc4a02
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/jimage/ImageBufferCache.java
@@ -0,0 +1,158 @@
+/*
+ * Copyright (c) 2014, 2016, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package jdk.internal.jimage;
+
+import java.lang.ref.WeakReference;
+import java.nio.ByteBuffer;
+import java.util.AbstractMap;
+import java.util.Arrays;
+import java.util.Comparator;
+import java.util.Map;
+
+/**
+ * @implNote This class needs to maintain JDK 8 source compatibility.
+ *
+ * It is used internally in the JDK to implement jimage/jrtfs access,
+ * but also compiled and delivered as part of the jrt-fs.jar to support access
+ * to the jimage file provided by the shipped JDK by tools running on JDK 8.
+ */
+class ImageBufferCache {
+    private static final int MAX_CACHED_BUFFERS = 3;
+    private static final int LARGE_BUFFER = 0x10000;
+
+    /*
+     * We used to have a class BufferReference extending from WeakReference<ByteBuffer>.
+     * BufferReference class had an  instance field called "capacity". This field was
+     * used to make DECREASING_CAPACITY_NULLS_LAST comparator stable in the presence
+     * of GC clearing the WeakReference concurrently.
+     *
+     * But this scheme results in metaspace leak. The thread local is alive till the
+     * the thread is alive. And so ImageBufferCache$BufferReference class was kept alive.
+     * Because this class and ImageBufferCache$BufferReference are all loaded by a URL
+     * class loader from jrt-fs.jar, the class loader and so all the classes loaded by it
+     * were alive!
+     *
+     * Solution is to avoid using a URL loader loaded class type with thread local. All we
+     * need is a pair of WeakReference<ByteBuffer>, Integer (saved capacity for stability
+     * of comparator). We use Map.Entry as pair implementation. With this, all types used
+     * with thread local are bootstrap types and so no metaspace leak.
+     */
+    @SuppressWarnings("unchecked")
+    private static final ThreadLocal<Map.Entry<WeakReference<ByteBuffer>, Integer>[]> CACHE =
+        new ThreadLocal<Map.Entry<WeakReference<ByteBuffer>, Integer>[]>() {
+            @Override
+            protected Map.Entry<WeakReference<ByteBuffer>, Integer>[] initialValue() {
+                // 1 extra slot to simplify logic of releaseBuffer()
+                return (Map.Entry<WeakReference<ByteBuffer>, Integer>[])new Map.Entry<?,?>[MAX_CACHED_BUFFERS + 1];
+            }
+        };
+
+    private static ByteBuffer allocateBuffer(long size) {
+        return ByteBuffer.allocateDirect((int)((size + 0xFFF) & ~0xFFF));
+    }
+
+    static ByteBuffer getBuffer(long size) {
+        if (size < 0 || Integer.MAX_VALUE < size) {
+            throw new IndexOutOfBoundsException("size");
+        }
+
+        ByteBuffer result = null;
+
+        if (size > LARGE_BUFFER) {
+            result = allocateBuffer(size);
+        } else {
+            Map.Entry<WeakReference<ByteBuffer>, Integer>[] cache = CACHE.get();
+
+            // buffers are ordered by decreasing capacity
+            // cache[MAX_CACHED_BUFFERS] is always null
+            for (int i = MAX_CACHED_BUFFERS - 1; i >= 0; i--) {
+                Map.Entry<WeakReference<ByteBuffer>, Integer> reference = cache[i];
+
+                if (reference != null) {
+                    ByteBuffer buffer = getByteBuffer(reference);
+
+                    if (buffer != null && size <= buffer.capacity()) {
+                        cache[i] = null;
+                        result = buffer;
+                        result.rewind();
+                        break;
+                    }
+                }
+            }
+
+            if (result == null) {
+                result = allocateBuffer(size);
+            }
+        }
+
+        result.limit((int)size);
+
+        return result;
+    }
+
+    static void releaseBuffer(ByteBuffer buffer) {
+        if (buffer.capacity() > LARGE_BUFFER) {
+            return;
+        }
+
+        Map.Entry<WeakReference<ByteBuffer>, Integer>[] cache = CACHE.get();
+
+        // expunge cleared BufferRef(s)
+        for (int i = 0; i < MAX_CACHED_BUFFERS; i++) {
+            Map.Entry<WeakReference<ByteBuffer>, Integer> reference = cache[i];
+            if (reference != null && getByteBuffer(reference) == null) {
+                cache[i] = null;
+            }
+        }
+
+        // insert buffer back with new BufferRef wrapping it
+        cache[MAX_CACHED_BUFFERS] = newCacheEntry(buffer);
+        Arrays.sort(cache, DECREASING_CAPACITY_NULLS_LAST);
+        // squeeze the smallest one out
+        cache[MAX_CACHED_BUFFERS] = null;
+    }
+
+    private static Map.Entry<WeakReference<ByteBuffer>, Integer> newCacheEntry(ByteBuffer bb) {
+        return new AbstractMap.SimpleEntry<WeakReference<ByteBuffer>, Integer>(
+                    new WeakReference<ByteBuffer>(bb), bb.capacity());
+    }
+
+    private static int getCapacity(Map.Entry<WeakReference<ByteBuffer>, Integer> e) {
+        return e == null? 0 : e.getValue();
+    }
+
+    private static ByteBuffer getByteBuffer(Map.Entry<WeakReference<ByteBuffer>, Integer> e) {
+        return e == null? null : e.getKey().get();
+    }
+
+    private static Comparator<Map.Entry<WeakReference<ByteBuffer>, Integer>> DECREASING_CAPACITY_NULLS_LAST =
+        new Comparator<Map.Entry<WeakReference<ByteBuffer>, Integer>>() {
+            @Override
+            public int compare(Map.Entry<WeakReference<ByteBuffer>, Integer> br1,
+                        Map.Entry<WeakReference<ByteBuffer>, Integer> br2) {
+                return Integer.compare(getCapacity(br1), getCapacity(br2));
+            }
+        };
+}
diff --git a/tests/test_data/std/jdk/internal/jimage/ImageHeader.class b/tests/test_data/std/jdk/internal/jimage/ImageHeader.class
new file mode 100644
index 0000000000000000000000000000000000000000..783e9a8438bb2c561960bc95e8e5473bde6ec06b
GIT binary patch
literal 3953
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zLDvvFX*;%eTEp)CbnrKjO`sVG9lPa>p&_}JyOkR%<eZhE*~K+0?`eqi4`iDOv&TRy
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hj7Xn0MEYGrq%x809Z2_yv`M7<4UjbaUR~x7{sUi^?5O|%

literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/jimage/ImageHeader.java b/tests/test_data/std/jdk/internal/jimage/ImageHeader.java
new file mode 100644
index 00000000..f6366511
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/jimage/ImageHeader.java
@@ -0,0 +1,183 @@
+/*
+ * Copyright (c) 2014, 2016, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package jdk.internal.jimage;
+
+import java.nio.ByteBuffer;
+import java.nio.IntBuffer;
+import java.util.Objects;
+
+/**
+ * @implNote This class needs to maintain JDK 8 source compatibility.
+ *
+ * It is used internally in the JDK to implement jimage/jrtfs access,
+ * but also compiled and delivered as part of the jrtfs.jar to support access
+ * to the jimage file provided by the shipped JDK by tools running on JDK 8.
+ */
+public final class ImageHeader {
+    public static final int MAGIC = 0xCAFEDADA;
+    public static final int MAJOR_VERSION = 1;
+    public static final int MINOR_VERSION = 0;
+    private static final int HEADER_SLOTS = 7;
+
+    private final int magic;
+    private final int majorVersion;
+    private final int minorVersion;
+    private final int flags;
+    private final int resourceCount;
+    private final int tableLength;
+    private final int locationsSize;
+    private final int stringsSize;
+
+    public ImageHeader(int resourceCount, int tableCount,
+            int locationsSize, int stringsSize) {
+        this(MAGIC, MAJOR_VERSION, MINOR_VERSION, 0, resourceCount,
+                tableCount, locationsSize, stringsSize);
+    }
+
+    public ImageHeader(int magic, int majorVersion, int minorVersion,
+                int flags, int resourceCount,
+                int tableLength, int locationsSize, int stringsSize)
+    {
+        this.magic = magic;
+        this.majorVersion = majorVersion;
+        this.minorVersion = minorVersion;
+        this.flags = flags;
+        this.resourceCount = resourceCount;
+        this.tableLength = tableLength;
+        this.locationsSize = locationsSize;
+        this.stringsSize = stringsSize;
+    }
+
+    public static int getHeaderSize() {
+       return HEADER_SLOTS * 4;
+    }
+
+    static ImageHeader readFrom(IntBuffer buffer) {
+        Objects.requireNonNull(buffer);
+
+        if (buffer.capacity() != HEADER_SLOTS) {
+            throw new InternalError(
+                "jimage header not the correct size: " + buffer.capacity());
+        }
+
+        int magic = buffer.get(0);
+        int version = buffer.get(1);
+        int majorVersion = version >>> 16;
+        int minorVersion = version & 0xFFFF;
+        int flags = buffer.get(2);
+        int resourceCount = buffer.get(3);
+        int tableLength = buffer.get(4);
+        int locationsSize = buffer.get(5);
+        int stringsSize = buffer.get(6);
+
+        return new ImageHeader(magic, majorVersion, minorVersion, flags,
+            resourceCount, tableLength, locationsSize, stringsSize);
+    }
+
+    public void writeTo(ImageStream stream) {
+        Objects.requireNonNull(stream);
+        stream.ensure(getHeaderSize());
+        writeTo(stream.getBuffer());
+    }
+
+    public void writeTo(ByteBuffer buffer) {
+        Objects.requireNonNull(buffer);
+        buffer.putInt(magic);
+        buffer.putInt(majorVersion << 16 | minorVersion);
+        buffer.putInt(flags);
+        buffer.putInt(resourceCount);
+        buffer.putInt(tableLength);
+        buffer.putInt(locationsSize);
+        buffer.putInt(stringsSize);
+    }
+
+    public int getMagic() {
+        return magic;
+    }
+
+    public int getMajorVersion() {
+        return majorVersion;
+    }
+
+    public int getMinorVersion() {
+        return minorVersion;
+    }
+
+    public int getFlags() {
+        return flags;
+    }
+
+    public int getResourceCount() {
+        return resourceCount;
+    }
+
+    public int getTableLength() {
+        return tableLength;
+    }
+
+    public int getRedirectSize() {
+        return tableLength * 4;
+    }
+
+    public int getOffsetsSize() {
+        return tableLength * 4;
+    }
+
+    public int getLocationsSize() {
+        return locationsSize;
+    }
+
+    public int getStringsSize() {
+        return stringsSize;
+    }
+
+    public int getIndexSize() {
+        return getHeaderSize() +
+               getRedirectSize() +
+               getOffsetsSize() +
+               getLocationsSize() +
+               getStringsSize();
+    }
+
+    int getRedirectOffset() {
+        return getHeaderSize();
+    }
+
+    int getOffsetsOffset() {
+        return getRedirectOffset() +
+               getRedirectSize();
+    }
+
+    int getLocationsOffset() {
+        return getOffsetsOffset() +
+               getOffsetsSize();
+    }
+
+    int getStringsOffset() {
+        return getLocationsOffset() +
+               getLocationsSize();
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/jimage/ImageLocation.class b/tests/test_data/std/jdk/internal/jimage/ImageLocation.class
new file mode 100644
index 0000000000000000000000000000000000000000..8e886c41c90de0e5f15a508c0dc48fdc8f701efb
GIT binary patch
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diff --git a/tests/test_data/std/jdk/internal/jimage/ImageLocation.java b/tests/test_data/std/jdk/internal/jimage/ImageLocation.java
new file mode 100644
index 00000000..f31c7291
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/jimage/ImageLocation.java
@@ -0,0 +1,369 @@
+/*
+ * Copyright (c) 2014, 2021, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package jdk.internal.jimage;
+
+import java.nio.ByteBuffer;
+import java.util.Objects;
+
+/**
+ * @implNote This class needs to maintain JDK 8 source compatibility.
+ *
+ * It is used internally in the JDK to implement jimage/jrtfs access,
+ * but also compiled and delivered as part of the jrtfs.jar to support access
+ * to the jimage file provided by the shipped JDK by tools running on JDK 8.
+ */
+public class ImageLocation {
+    public static final int ATTRIBUTE_END = 0;
+    public static final int ATTRIBUTE_MODULE = 1;
+    public static final int ATTRIBUTE_PARENT = 2;
+    public static final int ATTRIBUTE_BASE = 3;
+    public static final int ATTRIBUTE_EXTENSION = 4;
+    public static final int ATTRIBUTE_OFFSET = 5;
+    public static final int ATTRIBUTE_COMPRESSED = 6;
+    public static final int ATTRIBUTE_UNCOMPRESSED = 7;
+    public static final int ATTRIBUTE_COUNT = 8;
+
+    protected final long[] attributes;
+
+    protected final ImageStrings strings;
+
+    public ImageLocation(long[] attributes, ImageStrings strings) {
+        this.attributes = Objects.requireNonNull(attributes);
+        this.strings = Objects.requireNonNull(strings);
+    }
+
+    ImageStrings getStrings() {
+        return strings;
+    }
+
+    static long[] decompress(ByteBuffer bytes, int offset) {
+        Objects.requireNonNull(bytes);
+        long[] attributes = new long[ATTRIBUTE_COUNT];
+
+        int limit = bytes.limit();
+        while (offset < limit) {
+            int data = bytes.get(offset++) & 0xFF;
+            if (data <= 0x7) { // ATTRIBUTE_END
+                break;
+            }
+            int kind = data >>> 3;
+            if (ATTRIBUTE_COUNT <= kind) {
+                throw new InternalError(
+                    "Invalid jimage attribute kind: " + kind);
+            }
+
+            int length = (data & 0x7) + 1;
+            attributes[kind] = readValue(length, bytes, offset, limit);
+            offset += length;
+        }
+        return attributes;
+    }
+
+    public static byte[] compress(long[] attributes) {
+        Objects.requireNonNull(attributes);
+        ImageStream stream = new ImageStream(16);
+
+        for (int kind = ATTRIBUTE_END + 1; kind < ATTRIBUTE_COUNT; kind++) {
+            long value = attributes[kind];
+
+            if (value != 0) {
+                int n = (63 - Long.numberOfLeadingZeros(value)) >> 3;
+                stream.put((kind << 3) | n);
+
+                for (int i = n; i >= 0; i--) {
+                    stream.put((int)(value >> (i << 3)));
+                }
+            }
+        }
+
+        stream.put(ATTRIBUTE_END << 3);
+
+        return stream.toArray();
+     }
+
+    public boolean verify(String name) {
+        return verify(name, attributes, strings);
+    }
+
+    /**
+     * A simpler verification would be {@code name.equals(getFullName())}, but
+     * by not creating the full name and enabling early returns we allocate
+     * fewer objects.
+     */
+    static boolean verify(String name, long[] attributes, ImageStrings strings) {
+        Objects.requireNonNull(name);
+        final int length = name.length();
+        int index = 0;
+        int moduleOffset = (int)attributes[ATTRIBUTE_MODULE];
+        if (moduleOffset != 0 && length >= 1) {
+            int moduleLen = strings.match(moduleOffset, name, 1);
+            index = moduleLen + 1;
+            if (moduleLen < 0
+                    || length <= index
+                    || name.charAt(0) != '/'
+                    || name.charAt(index++) != '/') {
+                return false;
+            }
+        }
+        return verifyName(null, name, index, length, 0,
+                (int) attributes[ATTRIBUTE_PARENT],
+                (int) attributes[ATTRIBUTE_BASE],
+                (int) attributes[ATTRIBUTE_EXTENSION],
+                strings);
+    }
+
+    static boolean verify(String module, String name, ByteBuffer locations,
+                          int locationOffset, ImageStrings strings) {
+        int moduleOffset = 0;
+        int parentOffset = 0;
+        int baseOffset = 0;
+        int extOffset = 0;
+
+        int limit = locations.limit();
+        while (locationOffset < limit) {
+            int data = locations.get(locationOffset++) & 0xFF;
+            if (data <= 0x7) { // ATTRIBUTE_END
+                break;
+            }
+            int kind = data >>> 3;
+            if (ATTRIBUTE_COUNT <= kind) {
+                throw new InternalError(
+                        "Invalid jimage attribute kind: " + kind);
+            }
+
+            int length = (data & 0x7) + 1;
+            switch (kind) {
+                case ATTRIBUTE_MODULE:
+                    moduleOffset = (int) readValue(length, locations, locationOffset, limit);
+                    break;
+                case ATTRIBUTE_BASE:
+                    baseOffset = (int) readValue(length, locations, locationOffset, limit);
+                    break;
+                case ATTRIBUTE_PARENT:
+                    parentOffset = (int) readValue(length, locations, locationOffset, limit);
+                    break;
+                case ATTRIBUTE_EXTENSION:
+                    extOffset = (int) readValue(length, locations, locationOffset, limit);
+                    break;
+            }
+            locationOffset += length;
+        }
+        return verifyName(module, name, 0, name.length(),
+                moduleOffset, parentOffset, baseOffset, extOffset, strings);
+    }
+
+    private static long readValue(int length, ByteBuffer buffer, int offset, int limit) {
+        long value = 0;
+        for (int j = 0; j < length; j++) {
+            value <<= 8;
+            if (offset >= limit) {
+                throw new InternalError("Missing jimage attribute data");
+            }
+            value |= buffer.get(offset++) & 0xFF;
+        }
+        return value;
+    }
+
+    static boolean verify(String module, String name, long[] attributes,
+            ImageStrings strings) {
+        Objects.requireNonNull(module);
+        Objects.requireNonNull(name);
+        return verifyName(module, name, 0, name.length(),
+                (int) attributes[ATTRIBUTE_MODULE],
+                (int) attributes[ATTRIBUTE_PARENT],
+                (int) attributes[ATTRIBUTE_BASE],
+                (int) attributes[ATTRIBUTE_EXTENSION],
+                strings);
+    }
+
+    private static boolean verifyName(String module, String name, int index, int length,
+            int moduleOffset, int parentOffset, int baseOffset, int extOffset, ImageStrings strings) {
+
+        if (moduleOffset != 0) {
+            if (strings.match(moduleOffset, module, 0) != module.length()) {
+                return false;
+            }
+        }
+        if (parentOffset != 0) {
+            int parentLen = strings.match(parentOffset, name, index);
+            if (parentLen < 0) {
+                return false;
+            }
+            index += parentLen;
+            if (length <= index || name.charAt(index++) != '/') {
+                return false;
+            }
+        }
+        int baseLen = strings.match(baseOffset, name, index);
+        if (baseLen < 0) {
+            return false;
+        }
+        index += baseLen;
+        if (extOffset != 0) {
+            if (length <= index
+                    || name.charAt(index++) != '.') {
+                return false;
+            }
+
+            int extLen = strings.match(extOffset, name, index);
+            if (extLen < 0) {
+                return false;
+            }
+            index += extLen;
+        }
+        return length == index;
+    }
+
+    long getAttribute(int kind) {
+        if (kind < ATTRIBUTE_END || ATTRIBUTE_COUNT <= kind) {
+            throw new InternalError(
+                "Invalid jimage attribute kind: " + kind);
+        }
+        return attributes[kind];
+    }
+
+    String getAttributeString(int kind) {
+        if (kind < ATTRIBUTE_END || ATTRIBUTE_COUNT <= kind) {
+            throw new InternalError(
+                "Invalid jimage attribute kind: " + kind);
+        }
+        return getStrings().get((int)attributes[kind]);
+    }
+
+    public String getModule() {
+        return getAttributeString(ATTRIBUTE_MODULE);
+    }
+
+    public int getModuleOffset() {
+        return (int)getAttribute(ATTRIBUTE_MODULE);
+    }
+
+    public String getBase() {
+        return getAttributeString(ATTRIBUTE_BASE);
+    }
+
+    public int getBaseOffset() {
+        return (int)getAttribute(ATTRIBUTE_BASE);
+    }
+
+    public String getParent() {
+        return getAttributeString(ATTRIBUTE_PARENT);
+    }
+
+    public int getParentOffset() {
+        return (int)getAttribute(ATTRIBUTE_PARENT);
+    }
+
+    public String getExtension() {
+        return getAttributeString(ATTRIBUTE_EXTENSION);
+    }
+
+    public int getExtensionOffset() {
+        return (int)getAttribute(ATTRIBUTE_EXTENSION);
+    }
+
+    public String getFullName() {
+        return getFullName(false);
+    }
+
+    public String getFullName(boolean modulesPrefix) {
+        StringBuilder builder = new StringBuilder();
+
+        if (getModuleOffset() != 0) {
+            if (modulesPrefix) {
+                builder.append("/modules");
+            }
+
+            builder.append('/');
+            builder.append(getModule());
+            builder.append('/');
+        }
+
+        if (getParentOffset() != 0) {
+            builder.append(getParent());
+            builder.append('/');
+        }
+
+        builder.append(getBase());
+
+        if (getExtensionOffset() != 0) {
+            builder.append('.');
+            builder.append(getExtension());
+        }
+
+        return builder.toString();
+    }
+
+    String buildName(boolean includeModule, boolean includeParent,
+            boolean includeName) {
+        StringBuilder builder = new StringBuilder();
+
+        if (includeModule && getModuleOffset() != 0) {
+            builder.append("/modules/");
+            builder.append(getModule());
+         }
+
+        if (includeParent && getParentOffset() != 0) {
+            builder.append('/');
+            builder.append(getParent());
+        }
+
+        if (includeName) {
+            if (includeModule || includeParent) {
+                builder.append('/');
+            }
+
+            builder.append(getBase());
+
+            if (getExtensionOffset() != 0) {
+                builder.append('.');
+                builder.append(getExtension());
+            }
+        }
+
+        return builder.toString();
+   }
+
+    public long getContentOffset() {
+        return getAttribute(ATTRIBUTE_OFFSET);
+    }
+
+    public long getCompressedSize() {
+        return getAttribute(ATTRIBUTE_COMPRESSED);
+    }
+
+    public long getUncompressedSize() {
+        return getAttribute(ATTRIBUTE_UNCOMPRESSED);
+    }
+
+    static ImageLocation readFrom(BasicImageReader reader, int offset) {
+        Objects.requireNonNull(reader);
+        long[] attributes = reader.getAttributes(offset);
+        ImageStringsReader strings = reader.getStrings();
+
+        return new ImageLocation(attributes, strings);
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/jimage/ImageReader$Directory.class b/tests/test_data/std/jdk/internal/jimage/ImageReader$Directory.class
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diff --git a/tests/test_data/std/jdk/internal/jimage/ImageReader$LinkNode.class b/tests/test_data/std/jdk/internal/jimage/ImageReader$LinkNode.class
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diff --git a/tests/test_data/std/jdk/internal/jimage/ImageReader$Node.class b/tests/test_data/std/jdk/internal/jimage/ImageReader$Node.class
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diff --git a/tests/test_data/std/jdk/internal/jimage/ImageReader$Resource.class b/tests/test_data/std/jdk/internal/jimage/ImageReader$Resource.class
new file mode 100644
index 0000000000000000000000000000000000000000..51fa6c55e5635df04a0ced419a87a05de0b040c9
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diff --git a/tests/test_data/std/jdk/internal/jimage/ImageReader$SharedImageReader$LocationVisitor.class b/tests/test_data/std/jdk/internal/jimage/ImageReader$SharedImageReader$LocationVisitor.class
new file mode 100644
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diff --git a/tests/test_data/std/jdk/internal/jimage/ImageReader$SharedImageReader.class b/tests/test_data/std/jdk/internal/jimage/ImageReader$SharedImageReader.class
new file mode 100644
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diff --git a/tests/test_data/std/jdk/internal/jimage/ImageReader.class b/tests/test_data/std/jdk/internal/jimage/ImageReader.class
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HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/jimage/ImageReader.java b/tests/test_data/std/jdk/internal/jimage/ImageReader.java
new file mode 100644
index 00000000..f12c39f3
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/jimage/ImageReader.java
@@ -0,0 +1,858 @@
+/*
+ * Copyright (c) 2014, 2022, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package jdk.internal.jimage;
+
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.UncheckedIOException;
+import java.nio.ByteBuffer;
+import java.nio.ByteOrder;
+import java.nio.IntBuffer;
+import java.nio.file.Files;
+import java.nio.file.attribute.BasicFileAttributes;
+import java.nio.file.attribute.FileTime;
+import java.nio.file.Path;
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.HashMap;
+import java.util.HashSet;
+import java.util.List;
+import java.util.Map;
+import java.util.Objects;
+import java.util.Set;
+import java.util.function.Consumer;
+
+/**
+ * @implNote This class needs to maintain JDK 8 source compatibility.
+ *
+ * It is used internally in the JDK to implement jimage/jrtfs access,
+ * but also compiled and delivered as part of the jrtfs.jar to support access
+ * to the jimage file provided by the shipped JDK by tools running on JDK 8.
+ */
+public final class ImageReader implements AutoCloseable {
+    private final SharedImageReader reader;
+
+    private volatile boolean closed;
+
+    private ImageReader(SharedImageReader reader) {
+        this.reader = reader;
+    }
+
+    public static ImageReader open(Path imagePath, ByteOrder byteOrder) throws IOException {
+        Objects.requireNonNull(imagePath);
+        Objects.requireNonNull(byteOrder);
+
+        return SharedImageReader.open(imagePath, byteOrder);
+    }
+
+    public static ImageReader open(Path imagePath) throws IOException {
+        return open(imagePath, ByteOrder.nativeOrder());
+    }
+
+    @Override
+    public void close() throws IOException {
+        if (closed) {
+            throw new IOException("image file already closed");
+        }
+        reader.close(this);
+        closed = true;
+    }
+
+    private void ensureOpen() throws IOException {
+        if (closed) {
+            throw new IOException("image file closed");
+        }
+    }
+
+    private void requireOpen() {
+        if (closed) {
+            throw new IllegalStateException("image file closed");
+        }
+    }
+
+    // directory management interface
+    public Directory getRootDirectory() throws IOException {
+        ensureOpen();
+        return reader.getRootDirectory();
+    }
+
+
+    public Node findNode(String name) throws IOException {
+        ensureOpen();
+        return reader.findNode(name);
+    }
+
+    public byte[] getResource(Node node) throws IOException {
+        ensureOpen();
+        return reader.getResource(node);
+    }
+
+    public byte[] getResource(Resource rs) throws IOException {
+        ensureOpen();
+        return reader.getResource(rs);
+    }
+
+    public ImageHeader getHeader() {
+        requireOpen();
+        return reader.getHeader();
+    }
+
+    public static void releaseByteBuffer(ByteBuffer buffer) {
+        BasicImageReader.releaseByteBuffer(buffer);
+    }
+
+    public String getName() {
+        requireOpen();
+        return reader.getName();
+    }
+
+    public ByteOrder getByteOrder() {
+        requireOpen();
+        return reader.getByteOrder();
+    }
+
+    public Path getImagePath() {
+        requireOpen();
+        return reader.getImagePath();
+    }
+
+    public ImageStringsReader getStrings() {
+        requireOpen();
+        return reader.getStrings();
+    }
+
+    public ImageLocation findLocation(String mn, String rn) {
+        requireOpen();
+        return reader.findLocation(mn, rn);
+    }
+
+    public boolean verifyLocation(String mn, String rn) {
+        requireOpen();
+        return reader.verifyLocation(mn, rn);
+    }
+
+    public ImageLocation findLocation(String name) {
+        requireOpen();
+        return reader.findLocation(name);
+    }
+
+    public String[] getEntryNames() {
+        requireOpen();
+        return reader.getEntryNames();
+    }
+
+    public String[] getModuleNames() {
+        requireOpen();
+        int off = "/modules/".length();
+        return reader.findNode("/modules")
+                     .getChildren()
+                     .stream()
+                     .map(Node::getNameString)
+                     .map(s -> s.substring(off, s.length()))
+                     .toArray(String[]::new);
+    }
+
+    public long[] getAttributes(int offset) {
+        requireOpen();
+        return reader.getAttributes(offset);
+    }
+
+    public String getString(int offset) {
+        requireOpen();
+        return reader.getString(offset);
+    }
+
+    public byte[] getResource(String name) {
+        requireOpen();
+        return reader.getResource(name);
+    }
+
+    public byte[] getResource(ImageLocation loc) {
+        requireOpen();
+        return reader.getResource(loc);
+    }
+
+    public ByteBuffer getResourceBuffer(ImageLocation loc) {
+        requireOpen();
+        return reader.getResourceBuffer(loc);
+    }
+
+    public InputStream getResourceStream(ImageLocation loc) {
+        requireOpen();
+        return reader.getResourceStream(loc);
+    }
+
+    private static final class SharedImageReader extends BasicImageReader {
+        static final int SIZE_OF_OFFSET = Integer.BYTES;
+
+        static final Map<Path, SharedImageReader> OPEN_FILES = new HashMap<>();
+
+        // List of openers for this shared image.
+        final Set<ImageReader> openers;
+
+        // attributes of the .jimage file. jimage file does not contain
+        // attributes for the individual resources (yet). We use attributes
+        // of the jimage file itself (creation, modification, access times).
+        // Iniitalized lazily, see {@link #imageFileAttributes()}.
+        BasicFileAttributes imageFileAttributes;
+
+        // directory management implementation
+        final HashMap<String, Node> nodes;
+        volatile Directory rootDir;
+
+        Directory packagesDir;
+        Directory modulesDir;
+
+        private SharedImageReader(Path imagePath, ByteOrder byteOrder) throws IOException {
+            super(imagePath, byteOrder);
+            this.openers = new HashSet<>();
+            this.nodes = new HashMap<>();
+        }
+
+        public static ImageReader open(Path imagePath, ByteOrder byteOrder) throws IOException {
+            Objects.requireNonNull(imagePath);
+            Objects.requireNonNull(byteOrder);
+
+            synchronized (OPEN_FILES) {
+                SharedImageReader reader = OPEN_FILES.get(imagePath);
+
+                if (reader == null) {
+                    // Will fail with an IOException if wrong byteOrder.
+                    reader =  new SharedImageReader(imagePath, byteOrder);
+                    OPEN_FILES.put(imagePath, reader);
+                } else if (reader.getByteOrder() != byteOrder) {
+                    throw new IOException("\"" + reader.getName() + "\" is not an image file");
+                }
+
+                ImageReader image = new ImageReader(reader);
+                reader.openers.add(image);
+
+                return image;
+            }
+        }
+
+        public void close(ImageReader image) throws IOException {
+            Objects.requireNonNull(image);
+
+            synchronized (OPEN_FILES) {
+                if (!openers.remove(image)) {
+                    throw new IOException("image file already closed");
+                }
+
+                if (openers.isEmpty()) {
+                    close();
+                    nodes.clear();
+                    rootDir = null;
+
+                    if (!OPEN_FILES.remove(this.getImagePath(), this)) {
+                        throw new IOException("image file not found in open list");
+                    }
+                }
+            }
+        }
+
+        void addOpener(ImageReader reader) {
+            synchronized (OPEN_FILES) {
+                openers.add(reader);
+            }
+        }
+
+        boolean removeOpener(ImageReader reader) {
+            synchronized (OPEN_FILES) {
+                return openers.remove(reader);
+            }
+        }
+
+        // directory management interface
+        Directory getRootDirectory() {
+            return buildRootDirectory();
+        }
+
+        /**
+         * Lazily build a node from a name.
+         */
+        synchronized Node buildNode(String name) {
+            Node n;
+            boolean isPackages = name.startsWith("/packages");
+            boolean isModules = !isPackages && name.startsWith("/modules");
+
+            if (!(isModules || isPackages)) {
+                return null;
+            }
+
+            ImageLocation loc = findLocation(name);
+
+            if (loc != null) { // A sub tree node
+                if (isPackages) {
+                    n = handlePackages(name, loc);
+                } else { // modules sub tree
+                    n = handleModulesSubTree(name, loc);
+                }
+            } else { // Asking for a resource? /modules/java.base/java/lang/Object.class
+                if (isModules) {
+                    n = handleResource(name);
+                } else {
+                    // Possibly ask for /packages/java.lang/java.base
+                    // although /packages/java.base not created
+                    n = handleModuleLink(name);
+                }
+            }
+            return n;
+        }
+
+        synchronized Directory buildRootDirectory() {
+            Directory root = rootDir; // volatile read
+            if (root != null) {
+                return root;
+            }
+
+            root = newDirectory(null, "/");
+            root.setIsRootDir();
+
+            // /packages dir
+            packagesDir = newDirectory(root, "/packages");
+            packagesDir.setIsPackagesDir();
+
+            // /modules dir
+            modulesDir = newDirectory(root, "/modules");
+            modulesDir.setIsModulesDir();
+
+            root.setCompleted(true);
+            return rootDir = root;
+        }
+
+        /**
+         * To visit sub tree resources.
+         */
+        interface LocationVisitor {
+            void visit(ImageLocation loc);
+        }
+
+        void visitLocation(ImageLocation loc, LocationVisitor visitor) {
+            byte[] offsets = getResource(loc);
+            ByteBuffer buffer = ByteBuffer.wrap(offsets);
+            buffer.order(getByteOrder());
+            IntBuffer intBuffer = buffer.asIntBuffer();
+            for (int i = 0; i < offsets.length / SIZE_OF_OFFSET; i++) {
+                int offset = intBuffer.get(i);
+                ImageLocation pkgLoc = getLocation(offset);
+                visitor.visit(pkgLoc);
+            }
+        }
+
+        void visitPackageLocation(ImageLocation loc) {
+            // Retrieve package name
+            String pkgName = getBaseExt(loc);
+            // Content is array of offsets in Strings table
+            byte[] stringsOffsets = getResource(loc);
+            ByteBuffer buffer = ByteBuffer.wrap(stringsOffsets);
+            buffer.order(getByteOrder());
+            IntBuffer intBuffer = buffer.asIntBuffer();
+            // For each module, create a link node.
+            for (int i = 0; i < stringsOffsets.length / SIZE_OF_OFFSET; i++) {
+                // skip empty state, useless.
+                intBuffer.get(i);
+                i++;
+                int offset = intBuffer.get(i);
+                String moduleName = getString(offset);
+                Node targetNode = findNode("/modules/" + moduleName);
+                if (targetNode != null) {
+                    String pkgDirName = packagesDir.getName() + "/" + pkgName;
+                    Directory pkgDir = (Directory) nodes.get(pkgDirName);
+                    newLinkNode(pkgDir, pkgDir.getName() + "/" + moduleName, targetNode);
+                }
+            }
+        }
+
+        Node handlePackages(String name, ImageLocation loc) {
+            long size = loc.getUncompressedSize();
+            Node n = null;
+            // Only possibilities are /packages, /packages/package/module
+            if (name.equals("/packages")) {
+                visitLocation(loc, (childloc) -> {
+                    findNode(childloc.getFullName());
+                });
+                packagesDir.setCompleted(true);
+                n = packagesDir;
+            } else {
+                if (size != 0) { // children are offsets to module in StringsTable
+                    String pkgName = getBaseExt(loc);
+                    Directory pkgDir = newDirectory(packagesDir, packagesDir.getName() + "/" + pkgName);
+                    visitPackageLocation(loc);
+                    pkgDir.setCompleted(true);
+                    n = pkgDir;
+                } else { // Link to module
+                    String pkgName = loc.getParent();
+                    String modName = getBaseExt(loc);
+                    Node targetNode = findNode("/modules/" + modName);
+                    if (targetNode != null) {
+                        String pkgDirName = packagesDir.getName() + "/" + pkgName;
+                        Directory pkgDir = (Directory) nodes.get(pkgDirName);
+                        Node linkNode = newLinkNode(pkgDir, pkgDir.getName() + "/" + modName, targetNode);
+                        n = linkNode;
+                    }
+                }
+            }
+            return n;
+        }
+
+        // Asking for /packages/package/module although
+        // /packages/<pkg>/ not yet created, need to create it
+        // prior to return the link to module node.
+        Node handleModuleLink(String name) {
+            // eg: unresolved /packages/package/module
+            // Build /packages/package node
+            Node ret = null;
+            String radical = "/packages/";
+            String path = name;
+            if (path.startsWith(radical)) {
+                int start = radical.length();
+                int pkgEnd = path.indexOf('/', start);
+                if (pkgEnd != -1) {
+                    String pkg = path.substring(start, pkgEnd);
+                    String pkgPath = radical + pkg;
+                    Node n = findNode(pkgPath);
+                    // If not found means that this is a symbolic link such as:
+                    // /packages/java.util/java.base/java/util/Vector.class
+                    // and will be done by a retry of the filesystem
+                    for (Node child : n.getChildren()) {
+                        if (child.name.equals(name)) {
+                            ret = child;
+                            break;
+                        }
+                    }
+                }
+            }
+            return ret;
+        }
+
+        Node handleModulesSubTree(String name, ImageLocation loc) {
+            Node n;
+            assert (name.equals(loc.getFullName()));
+            Directory dir = makeDirectories(name);
+            visitLocation(loc, (childloc) -> {
+                String path = childloc.getFullName();
+                if (path.startsWith("/modules")) { // a package
+                    makeDirectories(path);
+                } else { // a resource
+                    makeDirectories(childloc.buildName(true, true, false));
+                    // if we have already created a resource for this name previously, then don't
+                    // recreate it
+                    if (!nodes.containsKey(childloc.getFullName(true))) {
+                        newResource(dir, childloc);
+                    }
+                }
+            });
+            dir.setCompleted(true);
+            n = dir;
+            return n;
+        }
+
+        Node handleResource(String name) {
+            Node n = null;
+            if (!name.startsWith("/modules/")) {
+                return null;
+            }
+            // Make sure that the thing that follows "/modules/" is a module name.
+            int moduleEndIndex = name.indexOf('/', "/modules/".length());
+            if (moduleEndIndex == -1) {
+                return null;
+            }
+            ImageLocation moduleLoc = findLocation(name.substring(0, moduleEndIndex));
+            if (moduleLoc == null || moduleLoc.getModuleOffset() == 0) {
+                return null;
+            }
+
+            String locationPath = name.substring("/modules".length());
+            ImageLocation resourceLoc = findLocation(locationPath);
+            if (resourceLoc != null) {
+                Directory dir = makeDirectories(resourceLoc.buildName(true, true, false));
+                Resource res = newResource(dir, resourceLoc);
+                n = res;
+            }
+            return n;
+        }
+
+        String getBaseExt(ImageLocation loc) {
+            String base = loc.getBase();
+            String ext = loc.getExtension();
+            if (ext != null && !ext.isEmpty()) {
+                base = base + "." + ext;
+            }
+            return base;
+        }
+
+        synchronized Node findNode(String name) {
+            buildRootDirectory();
+            Node n = nodes.get(name);
+            if (n == null || !n.isCompleted()) {
+                n = buildNode(name);
+            }
+            return n;
+        }
+
+        /**
+         * Returns the file attributes of the image file.
+         */
+        BasicFileAttributes imageFileAttributes() {
+            BasicFileAttributes attrs = imageFileAttributes;
+            if (attrs == null) {
+                try {
+                    Path file = getImagePath();
+                    attrs = Files.readAttributes(file, BasicFileAttributes.class);
+                } catch (IOException ioe) {
+                    throw new UncheckedIOException(ioe);
+                }
+                imageFileAttributes = attrs;
+            }
+            return attrs;
+        }
+
+        Directory newDirectory(Directory parent, String name) {
+            Directory dir = Directory.create(parent, name, imageFileAttributes());
+            nodes.put(dir.getName(), dir);
+            return dir;
+        }
+
+        Resource newResource(Directory parent, ImageLocation loc) {
+            Resource res = Resource.create(parent, loc, imageFileAttributes());
+            nodes.put(res.getName(), res);
+            return res;
+        }
+
+        LinkNode newLinkNode(Directory dir, String name, Node link) {
+            LinkNode linkNode = LinkNode.create(dir, name, link);
+            nodes.put(linkNode.getName(), linkNode);
+            return linkNode;
+        }
+
+        Directory makeDirectories(String parent) {
+            Directory last = rootDir;
+            for (int offset = parent.indexOf('/', 1);
+                    offset != -1;
+                    offset = parent.indexOf('/', offset + 1)) {
+                String dir = parent.substring(0, offset);
+                last = makeDirectory(dir, last);
+            }
+            return makeDirectory(parent, last);
+
+        }
+
+        Directory makeDirectory(String dir, Directory last) {
+            Directory nextDir = (Directory) nodes.get(dir);
+            if (nextDir == null) {
+                nextDir = newDirectory(last, dir);
+            }
+            return nextDir;
+        }
+
+        byte[] getResource(Node node) throws IOException {
+            if (node.isResource()) {
+                return super.getResource(node.getLocation());
+            }
+            throw new IOException("Not a resource: " + node);
+        }
+
+        byte[] getResource(Resource rs) throws IOException {
+            return super.getResource(rs.getLocation());
+        }
+    }
+
+    // jimage file does not store directory structure. We build nodes
+    // using the "path" strings found in the jimage file.
+    // Node can be a directory or a resource
+    public abstract static class Node {
+        private static final int ROOT_DIR = 0b0000_0000_0000_0001;
+        private static final int PACKAGES_DIR = 0b0000_0000_0000_0010;
+        private static final int MODULES_DIR = 0b0000_0000_0000_0100;
+
+        private int flags;
+        private final String name;
+        private final BasicFileAttributes fileAttrs;
+        private boolean completed;
+
+        protected Node(String name, BasicFileAttributes fileAttrs) {
+            this.name = Objects.requireNonNull(name);
+            this.fileAttrs = Objects.requireNonNull(fileAttrs);
+        }
+
+        /**
+         * A node is completed when all its direct children have been built.
+         *
+         * @return
+         */
+        public boolean isCompleted() {
+            return completed;
+        }
+
+        public void setCompleted(boolean completed) {
+            this.completed = completed;
+        }
+
+        public final void setIsRootDir() {
+            flags |= ROOT_DIR;
+        }
+
+        public final boolean isRootDir() {
+            return (flags & ROOT_DIR) != 0;
+        }
+
+        public final void setIsPackagesDir() {
+            flags |= PACKAGES_DIR;
+        }
+
+        public final boolean isPackagesDir() {
+            return (flags & PACKAGES_DIR) != 0;
+        }
+
+        public final void setIsModulesDir() {
+            flags |= MODULES_DIR;
+        }
+
+        public final boolean isModulesDir() {
+            return (flags & MODULES_DIR) != 0;
+        }
+
+        public final String getName() {
+            return name;
+        }
+
+        public final BasicFileAttributes getFileAttributes() {
+            return fileAttrs;
+        }
+
+        // resolve this Node (if this is a soft link, get underlying Node)
+        public final Node resolveLink() {
+            return resolveLink(false);
+        }
+
+        public Node resolveLink(boolean recursive) {
+            return this;
+        }
+
+        // is this a soft link Node?
+        public boolean isLink() {
+            return false;
+        }
+
+        public boolean isDirectory() {
+            return false;
+        }
+
+        public List<Node> getChildren() {
+            throw new IllegalArgumentException("not a directory: " + getNameString());
+        }
+
+        public boolean isResource() {
+            return false;
+        }
+
+        public ImageLocation getLocation() {
+            throw new IllegalArgumentException("not a resource: " + getNameString());
+        }
+
+        public long size() {
+            return 0L;
+        }
+
+        public long compressedSize() {
+            return 0L;
+        }
+
+        public String extension() {
+            return null;
+        }
+
+        public long contentOffset() {
+            return 0L;
+        }
+
+        public final FileTime creationTime() {
+            return fileAttrs.creationTime();
+        }
+
+        public final FileTime lastAccessTime() {
+            return fileAttrs.lastAccessTime();
+        }
+
+        public final FileTime lastModifiedTime() {
+            return fileAttrs.lastModifiedTime();
+        }
+
+        public final String getNameString() {
+            return name;
+        }
+
+        @Override
+        public final String toString() {
+            return getNameString();
+        }
+
+        @Override
+        public final int hashCode() {
+            return name.hashCode();
+        }
+
+        @Override
+        public final boolean equals(Object other) {
+            if (this == other) {
+                return true;
+            }
+
+            if (other instanceof Node) {
+                return name.equals(((Node) other).name);
+            }
+
+            return false;
+        }
+    }
+
+    // directory node - directory has full path name without '/' at end.
+    static final class Directory extends Node {
+        private final List<Node> children;
+
+        private Directory(String name, BasicFileAttributes fileAttrs) {
+            super(name, fileAttrs);
+            children = new ArrayList<>();
+        }
+
+        static Directory create(Directory parent, String name, BasicFileAttributes fileAttrs) {
+            Directory d = new Directory(name, fileAttrs);
+            if (parent != null) {
+                parent.addChild(d);
+            }
+            return d;
+        }
+
+        @Override
+        public boolean isDirectory() {
+            return true;
+        }
+
+        @Override
+        public List<Node> getChildren() {
+            return Collections.unmodifiableList(children);
+        }
+
+        void addChild(Node node) {
+            assert !children.contains(node) : "Child " + node + " already added";
+            children.add(node);
+        }
+
+        public void walk(Consumer<? super Node> consumer) {
+            consumer.accept(this);
+            for (Node child : children) {
+                if (child.isDirectory()) {
+                    ((Directory)child).walk(consumer);
+                } else {
+                    consumer.accept(child);
+                }
+            }
+        }
+    }
+
+    // "resource" is .class or any other resource (compressed/uncompressed) in a jimage.
+    // full path of the resource is the "name" of the resource.
+    static class Resource extends Node {
+        private final ImageLocation loc;
+
+        private Resource(ImageLocation loc, BasicFileAttributes fileAttrs) {
+            super(loc.getFullName(true), fileAttrs);
+            this.loc = loc;
+        }
+
+        static Resource create(Directory parent, ImageLocation loc, BasicFileAttributes fileAttrs) {
+            Resource rs = new Resource(loc, fileAttrs);
+            parent.addChild(rs);
+            return rs;
+        }
+
+        @Override
+        public boolean isCompleted() {
+            return true;
+        }
+
+        @Override
+        public boolean isResource() {
+            return true;
+        }
+
+        @Override
+        public ImageLocation getLocation() {
+            return loc;
+        }
+
+        @Override
+        public long size() {
+            return loc.getUncompressedSize();
+        }
+
+        @Override
+        public long compressedSize() {
+            return loc.getCompressedSize();
+        }
+
+        @Override
+        public String extension() {
+            return loc.getExtension();
+        }
+
+        @Override
+        public long contentOffset() {
+            return loc.getContentOffset();
+        }
+    }
+
+    // represents a soft link to another Node
+    static class LinkNode extends Node {
+        private final Node link;
+
+        private LinkNode(String name, Node link) {
+            super(name, link.getFileAttributes());
+            this.link = link;
+        }
+
+        static LinkNode create(Directory parent, String name, Node link) {
+            LinkNode ln = new LinkNode(name, link);
+            parent.addChild(ln);
+            return ln;
+        }
+
+        @Override
+        public boolean isCompleted() {
+            return true;
+        }
+
+        @Override
+        public Node resolveLink(boolean recursive) {
+            return (recursive && link instanceof LinkNode) ? ((LinkNode)link).resolveLink(true) : link;
+        }
+
+        @Override
+        public boolean isLink() {
+            return true;
+        }
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/jimage/ImageReaderFactory$1.class b/tests/test_data/std/jdk/internal/jimage/ImageReaderFactory$1.class
new file mode 100644
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diff --git a/tests/test_data/std/jdk/internal/jimage/ImageReaderFactory.class b/tests/test_data/std/jdk/internal/jimage/ImageReaderFactory.class
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diff --git a/tests/test_data/std/jdk/internal/jimage/ImageReaderFactory.java b/tests/test_data/std/jdk/internal/jimage/ImageReaderFactory.java
new file mode 100644
index 00000000..24ac9bfc
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/jimage/ImageReaderFactory.java
@@ -0,0 +1,90 @@
+/*
+ * Copyright (c) 2015, 2016, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package jdk.internal.jimage;
+
+import java.io.IOException;
+import java.io.UncheckedIOException;
+import java.nio.file.Path;
+import java.nio.file.Paths;
+import java.util.concurrent.ConcurrentHashMap;
+import java.util.Map;
+import java.util.Objects;
+import java.util.function.Function;
+
+/**
+ * Factory to get ImageReader
+ *
+ * @implNote This class needs to maintain JDK 8 source compatibility.
+ *
+ * It is used internally in the JDK to implement jimage/jrtfs access,
+ * but also compiled and delivered as part of the jrtfs.jar to support access
+ * to the jimage file provided by the shipped JDK by tools running on JDK 8.
+ */
+public class ImageReaderFactory {
+    private ImageReaderFactory() {}
+
+    private static final String JAVA_HOME = System.getProperty("java.home");
+    private static final Path BOOT_MODULES_JIMAGE =
+        Paths.get(JAVA_HOME, "lib", "modules");
+
+    private static final Map<Path, ImageReader> readers = new ConcurrentHashMap<>();
+
+    /**
+     * Returns an {@code ImageReader} to read from the given image file
+     */
+    public static ImageReader get(Path jimage) throws IOException {
+        Objects.requireNonNull(jimage);
+        try {
+            return readers.computeIfAbsent(jimage, OPENER);
+        } catch (UncheckedIOException io) {
+            throw io.getCause();
+        }
+    }
+
+    private static Function<Path, ImageReader> OPENER = new Function<Path, ImageReader>() {
+        public ImageReader apply(Path path) {
+            try {
+                return ImageReader.open(path);
+            } catch (IOException io) {
+                throw new UncheckedIOException(io);
+            }
+        }
+    };
+
+    /**
+     * Returns the {@code ImageReader} to read the image file in this
+     * run-time image.
+     *
+     * @throws UncheckedIOException if an I/O error occurs
+     */
+    public static ImageReader getImageReader() {
+        try {
+            return get(BOOT_MODULES_JIMAGE);
+        } catch (IOException ioe) {
+            throw new UncheckedIOException(ioe);
+        }
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/jimage/ImageStream.class b/tests/test_data/std/jdk/internal/jimage/ImageStream.class
new file mode 100644
index 0000000000000000000000000000000000000000..e43fdca26aced1845f9f4bdc05f3d3305a9e5953
GIT binary patch
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/jimage/ImageStream.java b/tests/test_data/std/jdk/internal/jimage/ImageStream.java
new file mode 100644
index 00000000..774e0e6e
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/jimage/ImageStream.java
@@ -0,0 +1,207 @@
+/*
+ * Copyright (c) 2014, 2016, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package jdk.internal.jimage;
+
+import java.nio.ByteBuffer;
+import java.nio.ByteOrder;
+import java.util.Arrays;
+import java.util.Objects;
+
+/**
+ * @implNote This class needs to maintain JDK 8 source compatibility.
+ *
+ * It is used internally in the JDK to implement jimage/jrtfs access,
+ * but also compiled and delivered as part of the jrtfs.jar to support access
+ * to the jimage file provided by the shipped JDK by tools running on JDK 8.
+ */
+public class ImageStream {
+    private ByteBuffer buffer;
+
+    public ImageStream() {
+        this(1024, ByteOrder.nativeOrder());
+    }
+
+    public ImageStream(int size) {
+        this(size, ByteOrder.nativeOrder());
+    }
+
+    public ImageStream(byte[] bytes) {
+       this(bytes, ByteOrder.nativeOrder());
+    }
+
+    public ImageStream(ByteOrder byteOrder) {
+        this(1024, byteOrder);
+    }
+
+    public ImageStream(int size, ByteOrder byteOrder) {
+        buffer = ByteBuffer.allocate(size);
+        buffer.order(Objects.requireNonNull(byteOrder));
+    }
+
+    public ImageStream(byte[] bytes, ByteOrder byteOrder) {
+        buffer = ByteBuffer.wrap(Objects.requireNonNull(bytes));
+        buffer.order(Objects.requireNonNull(byteOrder));
+    }
+
+    public ImageStream(ByteBuffer buffer) {
+        this.buffer = Objects.requireNonNull(buffer);
+    }
+
+    public ImageStream align(int alignment) {
+        int padding = (getSize() - 1) & ((1 << alignment) - 1);
+
+        for (int i = 0; i < padding; i++) {
+            put((byte)0);
+        }
+
+        return this;
+    }
+
+    public void ensure(int needs) {
+        if (needs < 0) {
+            throw new IndexOutOfBoundsException("Bad value: " + needs);
+        }
+
+        if (needs > buffer.remaining()) {
+            byte[] bytes = buffer.array();
+            ByteOrder byteOrder = buffer.order();
+            int position = buffer.position();
+            int newSize = needs <= bytes.length ? bytes.length << 1 : position + needs;
+            buffer = ByteBuffer.allocate(newSize);
+            buffer.order(byteOrder);
+            buffer.put(bytes, 0, position);
+        }
+    }
+
+    public boolean hasByte() {
+        return buffer.remaining() != 0;
+    }
+
+    public boolean hasBytes(int needs) {
+        return needs <= buffer.remaining();
+    }
+
+    public void skip(int n) {
+        if (n < 0) {
+            throw new IndexOutOfBoundsException("skip value = " + n);
+        }
+
+        buffer.position(buffer.position() + n);
+    }
+
+    public int get() {
+        return buffer.get() & 0xFF;
+    }
+
+    public void get(byte bytes[], int offset, int size) {
+        buffer.get(bytes, offset, size);
+    }
+
+    public int getShort() {
+        return buffer.getShort();
+    }
+
+    public int getInt() {
+        return buffer.getInt();
+    }
+
+    public long getLong() {
+        return buffer.getLong();
+    }
+
+    public ImageStream put(byte byt) {
+        ensure(1);
+        buffer.put(byt);
+
+        return this;
+    }
+
+    public ImageStream put(int byt) {
+        return put((byte)byt);
+    }
+
+    public ImageStream put(byte bytes[], int offset, int size) {
+        ensure(size);
+        buffer.put(bytes, offset, size);
+
+        return this;
+    }
+
+    public ImageStream put(ImageStream stream) {
+        put(stream.buffer.array(), 0, stream.buffer.position());
+
+        return this;
+    }
+
+    public ImageStream putShort(short value) {
+        ensure(2);
+        buffer.putShort(value);
+
+        return this;
+    }
+
+    public ImageStream putShort(int value) {
+        return putShort((short)value);
+    }
+
+    public ImageStream putInt(int value) {
+        ensure(4);
+        buffer.putInt(value);
+
+        return this;
+    }
+
+    public ImageStream putLong(long value) {
+        ensure(8);
+        buffer.putLong(value);
+
+        return this;
+    }
+
+    public ByteBuffer getBuffer() {
+        return buffer;
+    }
+
+    public int getPosition() {
+        return buffer.position();
+    }
+
+    public int getSize() {
+        return buffer.position();
+    }
+
+    public byte[] getBytes() {
+        return buffer.array();
+    }
+
+    public void setPosition(int offset) {
+        buffer.position(offset);
+    }
+
+    public byte[] toArray() {
+        return Arrays.copyOf(buffer.array(), buffer.position());
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/jimage/ImageStrings.class b/tests/test_data/std/jdk/internal/jimage/ImageStrings.class
new file mode 100644
index 0000000000000000000000000000000000000000..eb09fb3d62e8d2a1966cd5cd7add348392d23117
GIT binary patch
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/jimage/ImageStrings.java b/tests/test_data/std/jdk/internal/jimage/ImageStrings.java
new file mode 100644
index 00000000..eea62e44
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/jimage/ImageStrings.java
@@ -0,0 +1,49 @@
+/*
+ * Copyright (c) 2014, 2021, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package jdk.internal.jimage;
+
+/**
+ * @implNote This interface needs to maintain JDK 8 source compatibility.
+ *
+ * It is used internally in the JDK to implement jimage/jrtfs access,
+ * but also compiled and delivered as part of the jrtfs.jar to support access
+ * to the jimage file provided by the shipped JDK by tools running on JDK 8.
+ */
+public interface ImageStrings {
+    String get(int offset);
+
+    int add(final String string);
+
+    /**
+     * If there's a string at {@code offset} matching in full a substring of
+     * {@code string} starting at {@code stringOffset}, return the length
+     * of that string. Otherwise returns -1. Optional operation.
+     */
+    default int match(int offset, String string, int stringOffset) {
+        throw new UnsupportedOperationException();
+    }
+
+}
diff --git a/tests/test_data/std/jdk/internal/jimage/ImageStringsReader.class b/tests/test_data/std/jdk/internal/jimage/ImageStringsReader.class
new file mode 100644
index 0000000000000000000000000000000000000000..e14d9e9fe76075d96fb7d1822378f8526c4f182c
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HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/jimage/ImageStringsReader.java b/tests/test_data/std/jdk/internal/jimage/ImageStringsReader.java
new file mode 100644
index 00000000..c4601ef3
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/jimage/ImageStringsReader.java
@@ -0,0 +1,387 @@
+/*
+ * Copyright (c) 2014, 2021, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package jdk.internal.jimage;
+
+import java.io.UTFDataFormatException;
+import java.nio.ByteBuffer;
+import java.nio.charset.StandardCharsets;
+import java.util.Objects;
+
+/**
+ * @implNote This class needs to maintain JDK 8 source compatibility.
+ *
+ * It is used internally in the JDK to implement jimage/jrtfs access,
+ * but also compiled and delivered as part of the jrtfs.jar to support access
+ * to the jimage file provided by the shipped JDK by tools running on JDK 8.
+ */
+public class ImageStringsReader implements ImageStrings {
+    public static final int HASH_MULTIPLIER = 0x01000193;
+    public static final int POSITIVE_MASK = 0x7FFFFFFF;
+
+    private final BasicImageReader reader;
+
+    ImageStringsReader(BasicImageReader reader) {
+        this.reader = Objects.requireNonNull(reader);
+    }
+
+    @Override
+    public String get(int offset) {
+        return reader.getString(offset);
+    }
+
+    @Override
+    public int match(int offset, String string, int stringOffset) {
+        return reader.match(offset, string, stringOffset);
+    }
+
+    @Override
+    public int add(final String string) {
+        throw new InternalError("Can not add strings at runtime");
+    }
+
+    public static int hashCode(String s) {
+        return hashCode(s, HASH_MULTIPLIER);
+    }
+
+    public static int hashCode(String s, int seed) {
+        return unmaskedHashCode(s, seed) & POSITIVE_MASK;
+    }
+
+    public static int hashCode(String module, String name) {
+        return hashCode(module, name, HASH_MULTIPLIER);
+    }
+
+    public static int hashCode(String module, String name, int seed) {
+        seed = (seed * HASH_MULTIPLIER) ^ ('/');
+        seed = unmaskedHashCode(module, seed);
+        seed = (seed * HASH_MULTIPLIER) ^ ('/');
+        seed = unmaskedHashCode(name, seed);
+        return seed & POSITIVE_MASK;
+    }
+
+    public static int unmaskedHashCode(String s, int seed) {
+        int slen = s.length();
+        byte[] buffer = null;
+
+        for (int i = 0; i < slen; i++) {
+            int uch = s.charAt(i);
+
+            if ((uch & ~0x7F) != 0) {
+                if (buffer == null) {
+                    buffer = new byte[8];
+                }
+                int mask = ~0x3F;
+                int n = 0;
+
+                do {
+                    buffer[n++] = (byte)(0x80 | (uch & 0x3F));
+                    uch >>= 6;
+                    mask >>= 1;
+                } while ((uch & mask) != 0);
+
+                buffer[n] = (byte)((mask << 1) | uch);
+
+                do {
+                    seed = (seed * HASH_MULTIPLIER) ^ (buffer[n--] & 0xFF);
+                } while (0 <= n);
+            } else if (uch == 0) {
+                seed = (seed * HASH_MULTIPLIER) ^ (0xC0);
+                seed = (seed * HASH_MULTIPLIER) ^ (0x80);
+            } else {
+                seed = (seed * HASH_MULTIPLIER) ^ (uch);
+            }
+        }
+        return seed;
+    }
+
+    static int charsFromMUTF8Length(byte[] bytes, int offset, int count) {
+        int length = 0;
+
+        for (int i = offset; i < offset + count; i++) {
+            byte ch = bytes[i];
+
+            if (ch == 0) {
+                break;
+            }
+
+            if ((ch & 0xC0) != 0x80) {
+                length++;
+            }
+        }
+
+        return length;
+    }
+
+    static void charsFromMUTF8(char[] chars, byte[] bytes, int offset, int count) throws UTFDataFormatException {
+        int j = 0;
+
+        for (int i = offset; i < offset + count; i++) {
+            byte ch = bytes[i];
+
+            if (ch == 0) {
+                break;
+            }
+
+            boolean is_unicode = (ch & 0x80) != 0;
+            int uch = ch & 0x7F;
+
+            if (is_unicode) {
+                int mask = 0x40;
+
+                while ((uch & mask) != 0) {
+                    ch = bytes[++i];
+
+                    if ((ch & 0xC0) != 0x80) {
+                        throw new UTFDataFormatException("bad continuation 0x" + Integer.toHexString(ch));
+                    }
+
+                    uch = ((uch & ~mask) << 6) | (ch & 0x3F);
+                    mask <<= 6 - 1;
+                }
+
+                if ((uch & 0xFFFF) != uch) {
+                    throw new UTFDataFormatException("character out of range \\u" + Integer.toHexString(uch));
+                }
+            }
+
+            chars[j++] = (char)uch;
+        }
+    }
+
+    public static String stringFromMUTF8(byte[] bytes, int offset, int count) {
+        int length = charsFromMUTF8Length(bytes, offset, count);
+        char[] chars = new char[length];
+
+        try {
+            charsFromMUTF8(chars, bytes, offset, count);
+        } catch (UTFDataFormatException ex) {
+            throw new InternalError("Attempt to convert non modified UTF-8 byte sequence", ex);
+        }
+
+        return new String(chars);
+    }
+
+    public static String stringFromMUTF8(byte[] bytes) {
+        return stringFromMUTF8(bytes, 0, bytes.length);
+    }
+
+    /**
+     * Calculates the number of characters in the String present at the
+     * specified offset. As an optimization, the length returned will
+     * be positive if the characters are all ASCII, and negative otherwise.
+     */
+    private static int charsFromByteBufferLength(ByteBuffer buffer, int offset) {
+        int length = 0;
+
+        int limit = buffer.limit();
+        boolean asciiOnly = true;
+        while (offset < limit) {
+            byte ch = buffer.get(offset++);
+
+            if (ch < 0) {
+                asciiOnly = false;
+            } else if (ch == 0) {
+                return asciiOnly ? length : -length;
+            }
+
+            if ((ch & 0xC0) != 0x80) {
+                length++;
+            }
+        }
+        throw new InternalError("No terminating zero byte for modified UTF-8 byte sequence");
+    }
+
+    private static void charsFromByteBuffer(char[] chars, ByteBuffer buffer, int offset) {
+        int j = 0;
+
+        int limit = buffer.limit();
+        while (offset < limit) {
+            byte ch = buffer.get(offset++);
+
+            if (ch == 0) {
+                return;
+            }
+
+            boolean is_unicode = (ch & 0x80) != 0;
+            int uch = ch & 0x7F;
+
+            if (is_unicode) {
+                int mask = 0x40;
+
+                while ((uch & mask) != 0) {
+                    ch = buffer.get(offset++);
+
+                    if ((ch & 0xC0) != 0x80) {
+                        throw new InternalError("Bad continuation in " +
+                            "modified UTF-8 byte sequence: " + ch);
+                    }
+
+                    uch = ((uch & ~mask) << 6) | (ch & 0x3F);
+                    mask <<= 6 - 1;
+                }
+            }
+
+            if ((uch & 0xFFFF) != uch) {
+                throw new InternalError("UTF-32 char in modified UTF-8 " +
+                    "byte sequence: " + uch);
+            }
+
+            chars[j++] = (char)uch;
+        }
+
+        throw new InternalError("No terminating zero byte for modified UTF-8 byte sequence");
+    }
+
+    public static String stringFromByteBuffer(ByteBuffer buffer) {
+        return stringFromByteBuffer(buffer, 0);
+    }
+
+    /* package-private */
+    static String stringFromByteBuffer(ByteBuffer buffer, int offset) {
+        int length = charsFromByteBufferLength(buffer, offset);
+        if (length > 0) {
+            byte[] asciiBytes = new byte[length];
+            // Ideally we could use buffer.get(offset, asciiBytes, 0, length)
+            // here, but that was introduced in JDK 13
+            for (int i = 0; i < length; i++) {
+                asciiBytes[i] = buffer.get(offset++);
+            }
+            return new String(asciiBytes, StandardCharsets.US_ASCII);
+        }
+        char[] chars = new char[-length];
+        charsFromByteBuffer(chars, buffer, offset);
+        return new String(chars);
+    }
+
+    /* package-private */
+    static int stringFromByteBufferMatches(ByteBuffer buffer, int offset, String string, int stringOffset) {
+        // ASCII fast-path
+        int limit = buffer.limit();
+        int current = offset;
+        int slen = string.length();
+        while (current < limit) {
+            byte ch = buffer.get(current);
+            if (ch <= 0) {
+                if (ch == 0) {
+                    // Match
+                    return current - offset;
+                }
+                // non-ASCII byte, run slow-path from current offset
+                break;
+            }
+            if (slen <= stringOffset || string.charAt(stringOffset) != (char)ch) {
+                // No match
+                return -1;
+            }
+            stringOffset++;
+            current++;
+        }
+        // invariant: remainder of the string starting at current is non-ASCII,
+        // so return value from charsFromByteBufferLength will be negative
+        int length = -charsFromByteBufferLength(buffer, current);
+        char[] chars = new char[length];
+        charsFromByteBuffer(chars, buffer, current);
+        for (int i = 0; i < length; i++) {
+            if (string.charAt(stringOffset++) != chars[i]) {
+                return -1;
+            }
+        }
+        return current - offset + length;
+    }
+
+    static int mutf8FromStringLength(String s) {
+        int length = 0;
+        int slen = s.length();
+
+        for (int i = 0; i < slen; i++) {
+            char ch = s.charAt(i);
+            int uch = ch & 0xFFFF;
+
+            if ((uch & ~0x7F) != 0) {
+                int mask = ~0x3F;
+                int n = 0;
+
+                do {
+                    n++;
+                    uch >>= 6;
+                    mask >>= 1;
+                } while ((uch & mask) != 0);
+
+                length += n + 1;
+            } else if (uch == 0) {
+                length += 2;
+            } else {
+                length++;
+            }
+        }
+
+        return length;
+    }
+
+    static void mutf8FromString(byte[] bytes, int offset, String s) {
+        int j = offset;
+        byte[] buffer = null;
+        int slen = s.length();
+
+        for (int i = 0; i < slen; i++) {
+            char ch = s.charAt(i);
+            int uch = ch & 0xFFFF;
+
+            if ((uch & ~0x7F) != 0) {
+                if (buffer == null) {
+                    buffer = new byte[8];
+                }
+                int mask = ~0x3F;
+                int n = 0;
+
+                do {
+                    buffer[n++] = (byte)(0x80 | (uch & 0x3F));
+                    uch >>= 6;
+                    mask >>= 1;
+                } while ((uch & mask) != 0);
+
+                buffer[n] = (byte)((mask << 1) | uch);
+
+                do {
+                    bytes[j++] = buffer[n--];
+                } while (0 <= n);
+            } else if (uch == 0) {
+                bytes[j++] = (byte)0xC0;
+                bytes[j++] = (byte)0x80;
+            } else {
+                bytes[j++] = (byte)uch;
+            }
+        }
+    }
+
+    public static byte[] mutf8FromString(String string) {
+        int length = mutf8FromStringLength(string);
+        byte[] bytes = new byte[length];
+        mutf8FromString(bytes, 0, string);
+
+        return bytes;
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/jimage/NativeImageBuffer$1.class b/tests/test_data/std/jdk/internal/jimage/NativeImageBuffer$1.class
new file mode 100644
index 0000000000000000000000000000000000000000..94116fcfa0eb4d11d7377ef7d2bdfc823d1f7584
GIT binary patch
literal 840
zcma)4U2oGc6g_UcrON^<WsL7J#x~j^5%IuNr%9uLm{bZ<QQzIf%iN{5<T#c3uiym`
z5Bvar6yiFm)J|y9BIRED*!P@!ukW9~zkUPg;=o4*RS&fQD_CV{jQNy@DOXAOX*3p*
zWmr9uO4?(FYO6i0qfW?JPIw}G_*nN41h|2lmqG`#%!&!ada8NclOw~;jNwkJw_qPw
zBURFA4}COn%R@83ZEP|;AIBG=R8|<p)36i@``pT@ICY|L^0PBx_FhpsCRYs2R(pwc
zsAb&ou*I-lNM$0*jkL4yvyoGoibTXGk(HVPYh4`+hK-(7qMuJj!hGSQl#pgmM?4*J
zBi()u*6g{=7)a}S>2(-3FJ)GCli;<1Ocb}dA*r`Zsn0Kz$d!2?EkzW?9uuWM(7B1k
zdn%A&>%V5bbgiID->E3o8Fl@mu;)7V@Qh*qTJ<p0`y#U+bVl<KoGK+uH|1F-GVIXv
zRX~qR<5Z=erigZTX%&)Z4mtb*_Kg-5+#~CbffnwQ4ay66fQPhWZUV@<;Me5cJ+JBg
z#2Wib%QD=}D{x3UFP130lA>`!6p!W<3;pldSP)#Tzk<hw%r>4Beg{v<*RV@=uRwOO
MPu?ei26_7a0W#IQP5=M^

literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/jimage/NativeImageBuffer.class b/tests/test_data/std/jdk/internal/jimage/NativeImageBuffer.class
new file mode 100644
index 0000000000000000000000000000000000000000..887a627056e9bd8a5c1e99bb357308890f2baa8a
GIT binary patch
literal 669
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zph0R(4y|R^HL5JR#3q*HsY9zvm&b-E6qL$LA@b%LbS0pM6&b@eu!ScwCbI-Q#VSBe
zJi~K|Hu2(yq*YNTKM;Mo#)EH&KL#$Ea)mzzY|BU3k;~Tv*RYP4GB+e6!Ye`X6bS(S
E06K}HWdHyG

literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/jimage/NativeImageBuffer.java b/tests/test_data/std/jdk/internal/jimage/NativeImageBuffer.java
new file mode 100644
index 00000000..8d228c05
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/jimage/NativeImageBuffer.java
@@ -0,0 +1,49 @@
+/*
+ * Copyright (c) 2014, 2021, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package jdk.internal.jimage;
+
+import java.nio.ByteBuffer;
+
+/**
+ * @implNote This class needs to maintain JDK 8 source compatibility.
+ *
+ * It is used internally in the JDK to implement jimage/jrtfs access,
+ * but also compiled and delivered as part of the jrtfs.jar to support access
+ * to the jimage file provided by the shipped JDK by tools running on JDK 8.
+ */
+@SuppressWarnings("removal")
+class NativeImageBuffer {
+    static {
+        java.security.AccessController.doPrivileged(
+                new java.security.PrivilegedAction<Void>() {
+                    public Void run() {
+                        System.loadLibrary("jimage");
+                        return null;
+                    }
+                });
+    }
+
+    static native ByteBuffer getNativeMap(String imagePath);
+}
diff --git a/tests/test_data/std/jdk/internal/jimage/decompressor/CompressIndexes.class b/tests/test_data/std/jdk/internal/jimage/decompressor/CompressIndexes.class
new file mode 100644
index 0000000000000000000000000000000000000000..97399040f92acd8b1b23cd8ee1a19c14fa24b1b0
GIT binary patch
literal 2550
zcmb7G&sP&y7`>BBG9iQzkf4Mh_^XB>1O>4cNaaV6v_Y()SbsAlLl_JbPBKySSP$*7
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z&el}c4}-xW<#NH{yC8V*hoTBNRRwGcZK3BG>O-D~?#IN`_G6}NFq_`QY?PS%g{WdC
zs+fTarZ*Jm6p*3)kXLIU18+k530Wt8Z>x~MQVVe*&PCe?MrpspaXunLsygHfx;i$|
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ONM9dd=6N1>VD(>o`T2nW

literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/jimage/decompressor/CompressIndexes.java b/tests/test_data/std/jdk/internal/jimage/decompressor/CompressIndexes.java
new file mode 100644
index 00000000..709b82a8
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/jimage/decompressor/CompressIndexes.java
@@ -0,0 +1,136 @@
+/*
+ * Copyright (c) 2014, 2016, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package jdk.internal.jimage.decompressor;
+
+import java.io.DataInputStream;
+import java.io.IOException;
+import java.nio.ByteBuffer;
+import java.util.ArrayList;
+import java.util.List;
+
+/**
+ *
+ * Index compressor. Use the minimal amount of bytes required to store
+ * an integer.
+ *
+ * @implNote This class needs to maintain JDK 8 source compatibility.
+ *
+ * It is used internally in the JDK to implement jimage/jrtfs access,
+ * but also compiled and delivered as part of the jrtfs.jar to support access
+ * to the jimage file provided by the shipped JDK by tools running on JDK 8.
+ */
+public class CompressIndexes {
+    private static final int COMPRESSED_FLAG = 1 << (Byte.SIZE - 1);
+    private static final int HEADER_WIDTH = 3;
+    private static final int HEADER_SHIFT = Byte.SIZE - HEADER_WIDTH;
+
+    public static List<Integer> decompressFlow(byte[] values) {
+        List<Integer> lst = new ArrayList<>();
+
+        for (int i = 0; i < values.length; i += getHeaderLength(values[i])) {
+            int decompressed = decompress(values, i);
+            lst.add(decompressed);
+        }
+
+        return lst;
+    }
+
+    public static int readInt(DataInputStream cr) throws IOException {
+        // Get header byte.
+        byte header = cr.readByte();
+        // Determine size.
+        int size = getHeaderLength(header);
+        // Prepare result.
+        int result = getHeaderValue(header);
+
+        // For each value byte
+        for (int i = 1; i < size; i++) {
+            // Merge byte value.
+            result <<= Byte.SIZE;
+            result |= cr.readByte() & 0xFF;
+        }
+
+        return result;
+    }
+
+    private static boolean isCompressed(byte b) {
+        return (b & COMPRESSED_FLAG) != 0;
+    }
+
+    private static int getHeaderLength(byte b) {
+        return isCompressed(b) ? (b >> HEADER_SHIFT) & 3 : Integer.BYTES;
+    }
+
+    private static int getHeaderValue(byte b) {
+        return isCompressed(b) ? b & (1 << HEADER_SHIFT) - 1 : b;
+    }
+
+    public static int decompress(byte[] value, int offset) {
+        // Get header byte.
+        byte header = value[offset];
+        // Determine size.
+        int size = getHeaderLength(header);
+        // Prepare result.
+        int result = getHeaderValue(header);
+
+        // For each value byte
+        for (int i = 1; i < size; i++) {
+            // Merge byte value.
+            result <<= Byte.SIZE;
+            result |= value[offset + i] & 0xFF;
+        }
+
+        return result;
+    }
+
+    public static byte[] compress(int value) {
+        // Only positive values are supported.
+        if (value < 0) {
+            throw new  IllegalArgumentException("value < 0");
+        }
+
+        // Determine number of significant digits.
+        int width = 32 - Integer.numberOfLeadingZeros(value);
+        // Determine number of byte to represent.  Allow for header if
+        // compressed.
+        int size = Math.min(((width + HEADER_WIDTH - 1) >> 3) + 1, Integer.BYTES);
+
+        // Allocate result buffer.
+        byte[] result = new byte[size];
+
+        // Insert significant bytes in result.
+        for (int i = 0; i < size; i++) {
+            result[i] = (byte)(value >> ((size - i - 1) * Byte.SIZE));
+        }
+
+        // If compressed, mark and insert size.
+        if (size < Integer.BYTES) {
+            result[0] |= (byte)(COMPRESSED_FLAG | (size << HEADER_SHIFT));
+        }
+
+        return result;
+    }
+
+}
diff --git a/tests/test_data/std/jdk/internal/jimage/decompressor/CompressedResourceHeader.class b/tests/test_data/std/jdk/internal/jimage/decompressor/CompressedResourceHeader.class
new file mode 100644
index 0000000000000000000000000000000000000000..5bfcd50745c78f44e01d203faa391d66bb059046
GIT binary patch
literal 2656
zcmbVOTT>Hf7=FH-iHpV%D1ub!!6qR!TCG;GD1m@UbFc}5f-PN=1s9VIZW5K=^=I^|
z9dCNm&e)lPOgrNb@K^MAI8*KO?QS&C*b5nEzr%Za-s6|&FaLZ7U<TVkxZw7~qreNF
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gZ-@PXJbFBWO-+9Ob1#!{km`F)l^ynw94<Wi7wmlxQ2+n{

literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/jimage/decompressor/CompressedResourceHeader.java b/tests/test_data/std/jdk/internal/jimage/decompressor/CompressedResourceHeader.java
new file mode 100644
index 00000000..16a3b7d6
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/jimage/decompressor/CompressedResourceHeader.java
@@ -0,0 +1,124 @@
+/*
+ * Copyright (c) 2015, 2024, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package jdk.internal.jimage.decompressor;
+
+import java.nio.ByteBuffer;
+import java.nio.ByteOrder;
+import java.util.Objects;
+
+/**
+ *
+ * A resource header for compressed resource. This class is handled internally,
+ * you don't have to add header to the resource, headers are added automatically
+ * for compressed resources.
+ *
+ * @implNote This class needs to maintain JDK 8 source compatibility.
+ *
+ * It is used internally in the JDK to implement jimage/jrtfs access,
+ * but also compiled and delivered as part of the jrtfs.jar to support access
+ * to the jimage file provided by the shipped JDK by tools running on JDK 8.
+ */
+public final class CompressedResourceHeader {
+
+    private static final int SIZE = 29;
+    public static final int MAGIC = 0xCAFEFAFA;
+
+    // Standard header offsets
+    private static final int MAGIC_OFFSET = 0; // 4 bytes
+    private static final int COMPRESSED_OFFSET = 4; // 8 bytes
+    private static final int UNCOMPRESSED_OFFSET = 12; // 8 bytes
+    private static final int DECOMPRESSOR_NAME_OFFSET = 20; // 4 bytes, followed by 4 byte gap
+    private static final int IS_TERMINAL_OFFSET = 28; // 1 byte
+
+    private final long uncompressedSize;
+    private final long compressedSize;
+    private final int decompressorNameOffset;
+    private final boolean isTerminal;
+
+    public CompressedResourceHeader(long compressedSize,
+            long uncompressedSize, int decompressorNameOffset,
+            boolean isTerminal) {
+        this.compressedSize = compressedSize;
+        this.uncompressedSize = uncompressedSize;
+        this.decompressorNameOffset = decompressorNameOffset;
+        this.isTerminal = isTerminal;
+    }
+
+    public boolean isTerminal() {
+        return isTerminal;
+    }
+
+    public int getDecompressorNameOffset() {
+        return decompressorNameOffset;
+    }
+
+    public long getUncompressedSize() {
+        return uncompressedSize;
+    }
+
+    public long getResourceSize() {
+        return compressedSize;
+    }
+
+    public byte[] getBytes(ByteOrder order) {
+        Objects.requireNonNull(order);
+        ByteBuffer buffer = ByteBuffer.allocate(SIZE);
+        buffer.order(order);
+        buffer.putInt(MAGIC);
+        buffer.putLong(compressedSize);
+        buffer.putLong(uncompressedSize);
+        buffer.putInt(decompressorNameOffset);
+        // Compatibility
+        buffer.putInt(-1);
+        buffer.put(isTerminal ? (byte)1 : (byte)0);
+        return buffer.array();
+    }
+
+    public static int getSize() {
+        return SIZE;
+    }
+
+    public static CompressedResourceHeader readFromResource(ByteOrder order,
+            byte[] resource) {
+        Objects.requireNonNull(order);
+        Objects.requireNonNull(resource);
+        if (resource.length < getSize()) {
+            return null;
+        }
+        ByteBuffer buffer = ByteBuffer.wrap(resource, 0, SIZE);
+        buffer.order(order);
+        int magic = buffer.getInt(MAGIC_OFFSET);
+        if (magic != MAGIC) {
+            return null;
+        }
+        long size = buffer.getLong(COMPRESSED_OFFSET);
+        long uncompressedSize = buffer.getLong(UNCOMPRESSED_OFFSET);
+        int decompressorNameOffset = buffer.getInt(DECOMPRESSOR_NAME_OFFSET);
+        // skip unused 'contentOffset' int
+        byte isTerminal = buffer.get(IS_TERMINAL_OFFSET);
+        return new CompressedResourceHeader(size, uncompressedSize,
+                decompressorNameOffset, isTerminal == 1);
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/jimage/decompressor/Decompressor.class b/tests/test_data/std/jdk/internal/jimage/decompressor/Decompressor.class
new file mode 100644
index 0000000000000000000000000000000000000000..cf1a35fa961c077f057d82ddaa5df5f272e44e9c
GIT binary patch
literal 2886
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zpBbPdwE%jX9fHw@cMZIUeFD*}^nysH%tbjmH&>9%9aEOnu^;bi_`tvcd{_a_M<mJQ
zWR=(2l9?;=BZ1bAWDub8iFgwZp+iHbfi4C9ma5dy3|-LBBXGQCNEKXy9yj4IVj7MZ
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z_^6JdfjX{W0e6VvW7^AMkxxhQHEcNafw-12S5JA|_4BX{7X?4t%kWU7=dHA{gnP`{
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BKcN5s

literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/jimage/decompressor/Decompressor.java b/tests/test_data/std/jdk/internal/jimage/decompressor/Decompressor.java
new file mode 100644
index 00000000..3600f31c
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/jimage/decompressor/Decompressor.java
@@ -0,0 +1,93 @@
+/*
+ * Copyright (c) 2015, 2024, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package jdk.internal.jimage.decompressor;
+
+import java.io.IOException;
+import java.nio.ByteOrder;
+import java.util.HashMap;
+import java.util.Map;
+import java.util.Objects;
+import jdk.internal.jimage.decompressor.ResourceDecompressor.StringsProvider;
+
+/**
+ * Entry point to decompress resources.
+ *
+ * @implNote This class needs to maintain JDK 8 source compatibility.
+ *
+ * It is used internally in the JDK to implement jimage/jrtfs access,
+ * but also compiled and delivered as part of the jrtfs.jar to support access
+ * to the jimage file provided by the shipped JDK by tools running on JDK 8.
+ */
+public final class Decompressor {
+
+    private final Map<Integer, ResourceDecompressor> pluginsCache = new HashMap<>();
+
+    public Decompressor() {
+    }
+
+    /**
+     * Decompress a resource.
+     * @param order Byte order.
+     * @param provider Strings provider
+     * @param content The resource content to uncompress.
+     * @return A fully uncompressed resource.
+     * @throws IOException
+     */
+    public byte[] decompressResource(ByteOrder order, StringsProvider provider,
+            byte[] content) throws IOException {
+        Objects.requireNonNull(order);
+        Objects.requireNonNull(provider);
+        Objects.requireNonNull(content);
+        CompressedResourceHeader header;
+        do {
+            header = CompressedResourceHeader.readFromResource(order, content);
+            if (header != null) {
+                ResourceDecompressor decompressor =
+                        pluginsCache.get(header.getDecompressorNameOffset());
+                if (decompressor == null) {
+                    String pluginName =
+                            provider.getString(header.getDecompressorNameOffset());
+                    if (pluginName == null) {
+                        throw new IOException("Plugin name not found");
+                    }
+                    decompressor = ResourceDecompressorRepository.
+                            newResourceDecompressor(pluginName);
+                    if (decompressor == null) {
+                        throw new IOException("Plugin not found: " + pluginName);
+                    }
+
+                    pluginsCache.put(header.getDecompressorNameOffset(), decompressor);
+                }
+                try {
+                    content = decompressor.decompress(provider, content,
+                            CompressedResourceHeader.getSize(), header.getUncompressedSize());
+                } catch (Exception ex) {
+                    throw new IOException(ex);
+                }
+            }
+        } while (header != null);
+        return content;
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/jimage/decompressor/ResourceDecompressor$StringsProvider.class b/tests/test_data/std/jdk/internal/jimage/decompressor/ResourceDecompressor$StringsProvider.class
new file mode 100644
index 0000000000000000000000000000000000000000..49504acdac22d6f7e623a8d780c28ef826e8d5b9
GIT binary patch
literal 341
zcmbVIu}%U(5Pbu9#~mOv6!aF*xD}NpVk9AA<O|lj$z{)Dm+Y*3oP{6YM;R9=G{(wi
z-sI)Y%zN|k`SuQAfy)#v!m=)3l(B)m)s3pnPFJi-F5GVKS;Tqu#Nu9k!M8uit8MVc
zR`TfG!IbP%bO@tbAGB(;t<>hZ<{}WXio;n-7*AKT^|$0q-w^WcY5kpPm@xV4+VydY
z(0yPD_fA5J9%243<AnaoTK0=Zi?9%ezmg;bLOVVPpqS|bN$lE4V{M^}?1VY`5%Z{w
I_AyAZFM6_K(f|Me

literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/jimage/decompressor/ResourceDecompressor.class b/tests/test_data/std/jdk/internal/jimage/decompressor/ResourceDecompressor.class
new file mode 100644
index 0000000000000000000000000000000000000000..ab85c087eba2a7d0cfc09f6231b8977e97fb3317
GIT binary patch
literal 494
zcmb_Z!A`<J6r6|HN<oX_#k&W%*pnx2ASM_DBS%h4`_i<wTe4dT-{!#&@S}{cYOFDy
zjEBu`W@cw+-oCs(Jp&k{=b}NlOrwV&(Ip$LvLH=z6>|`ASmYbS))pqXXIng)kgvXh
zE}DdHs<tY~l#YYNI_0n=xG|S=l{4YAKbY10vNVZ~hXk*-CM^21KfQkbVQ245u}va2
z!_{bdGgytpezFUBQznJBF4}}%9pQ@+)$+a2b&^TYv)}q%RQCw&IotA<^EDgs>k=ma
zl9$k#YRzVxDQnph{2zrJ0%1>n324Zm_u-%#xQhe9TY@%a_e9aD6gb4uC+6c=PM)y7
ItP`j82BhhcV*mgE

literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/jimage/decompressor/ResourceDecompressor.java b/tests/test_data/std/jdk/internal/jimage/decompressor/ResourceDecompressor.java
new file mode 100644
index 00000000..3e4e32d2
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/jimage/decompressor/ResourceDecompressor.java
@@ -0,0 +1,59 @@
+/*
+ * Copyright (c) 2015, 2016, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package jdk.internal.jimage.decompressor;
+
+/**
+ *
+ * JLink Image Decompressor.
+ *
+ * @implNote This class needs to maintain JDK 8 source compatibility.
+ *
+ * It is used internally in the JDK to implement jimage/jrtfs access,
+ * but also compiled and delivered as part of the jrtfs.jar to support access
+ * to the jimage file provided by the shipped JDK by tools running on JDK 8.
+ */
+public interface ResourceDecompressor {
+
+    public interface StringsProvider {
+        public String getString(int offset);
+    }
+    /**
+     * Decompressor unique name.
+     * @return The decompressor name.
+     */
+    public String getName();
+
+    /**
+     * Decompress a resource.
+     * @param strings The String provider
+     * @param content The resource content
+     * @param offset Resource content offset
+     * @param originalSize Uncompressed size
+     * @return Uncompressed resource
+     * @throws Exception
+     */
+    public byte[] decompress(StringsProvider strings, byte[] content, int offset,
+            long originalSize) throws Exception;
+}
diff --git a/tests/test_data/std/jdk/internal/jimage/decompressor/ResourceDecompressorFactory.class b/tests/test_data/std/jdk/internal/jimage/decompressor/ResourceDecompressorFactory.class
new file mode 100644
index 0000000000000000000000000000000000000000..7638bde200e0ea121b653d7ef3b14cda91c2fc9a
GIT binary patch
literal 693
zcmbtR%TB^T6g>llO09r`Zx_1bVeG<{k+4BYOb8@m*bilbgYA^G#m8T1qA_vd2l!FO
z+d`Ct#DzAQ&fI&?J#*)rkI%Pv01fOJNFb?0Gm%1?AwS}`+;X@YTAlt#*dar@CY229
z49QZtm%$P;It&xbFd1s2!Hp$VD15~oYb0Gh6xKl4o;&tM5O}_IDFSce+v034+2nTU
z`40@5;;vv=YyI5X4SlJGrwr?*#ca7pJq>R_J-L=tqCIi@!oT8uCuZ?%?)11Xqj;9o
z!fP2Y)LZ`<l%~;#B5cRQ7E9&D!Dt>O?&jafa1sIkA`e|>oZs7G97<0GI<^@Ku|U$Z
zE;`>8LUm(ln=*R-{x3=&MeW)Fd6yv9N$|)$Iwhfz?JJbYQq-hsR5vQGV3q0%^e2iE
z$k9JbSfE1qDl#}ko}!H@8mq(?eMZd6h^>I)jMJi>Q7u(@hW<#0DP1~F9>+B16fmXH
T$ao@V*d(k*`xdR8xNr9h)%K`h

literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/jimage/decompressor/ResourceDecompressorFactory.java b/tests/test_data/std/jdk/internal/jimage/decompressor/ResourceDecompressorFactory.java
new file mode 100644
index 00000000..7c6e3265
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/jimage/decompressor/ResourceDecompressorFactory.java
@@ -0,0 +1,62 @@
+/*
+ * Copyright (c) 2015, 2024, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package jdk.internal.jimage.decompressor;
+
+import java.io.IOException;
+
+/**
+ *
+ * JLink Resource Decompressor factory
+ *
+ * @implNote This class needs to maintain JDK 8 source compatibility.
+ *
+ * It is used internally in the JDK to implement jimage/jrtfs access,
+ * but also compiled and delivered as part of the jrtfs.jar to support access
+ * to the jimage file provided by the shipped JDK by tools running on JDK 8.
+ */
+public abstract class ResourceDecompressorFactory {
+    private final String name;
+
+    protected ResourceDecompressorFactory(String name) {
+        this.name = name;
+    }
+
+    /**
+     * The Factory name.
+     * @return The name.
+     */
+    public String getName() {
+        return name;
+    }
+
+    /**
+     * To build a new decompressor.
+     * @return A new decompressor.
+     * @throws IOException
+     */
+    public abstract ResourceDecompressor newDecompressor() throws IOException;
+
+}
+
diff --git a/tests/test_data/std/jdk/internal/jimage/decompressor/ResourceDecompressorRepository.class b/tests/test_data/std/jdk/internal/jimage/decompressor/ResourceDecompressorRepository.class
new file mode 100644
index 0000000000000000000000000000000000000000..6cff9f9a45a932555a0dbdd3443ce8ffcb15a077
GIT binary patch
literal 1735
zcmbtUX>$@m5Pbva0s)C663@h22<m!Y5IoSRB_0*5So&=PBN>EUYFRw~l}D9Vsw_YG
z!QW(AzFCm0N>!@x%l1sqZ1?LoulxJY&tCwPQH~>ouz^Sdo3L46vS~fH%$8+0%=;@%
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zaFk&-4AN(>x@u_>M?%gcOet1X!?wJhOZu%oiNB>-3~)Mli~qx3DhNc%PMxVz6=lnN
zz4nT9A6hFddeRlAX0?_HSMLYTh_|ZPBUi`EyWVn4JVW)4>Pvw;K{*Wy9aq;Z(DtRA
z{+B$S>An{zjaSZZ32-P>J*)PN${o-YzwxprJDzgvt^p3MDPQ8sF>l`=p0Lk!c7Ogv
zi?!BZzQwElq*_$^4GxSVXr0C5IxJ37<{{2eft`9D(jMn71QQW{IZ)|2LC<MgLAz=G
z1H>Eu%1M6p>;;bU@-dv^N(bO2UOz({!&#i;4ISVqt-ibcEsXh3NQUqgQ<eNTMDy>l
z?X`H#voPTRX+{G|Na8Z5<`rac&5xbw|Bv&y!1E;GUc@ElD{vQu_<@YUIaK5>Lhk~x
zv3a@D*%ugFBTMP*@3Dgj_Jr~1??M(iu5ShkNfE*&Km3&;6J;L;Ft>(%k3ZnRI~Z#?
j$kpMGII@O3SI4;0p+%q`lXy;Hn#|0S8+HNDL%8+}6|~%d

literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/jimage/decompressor/ResourceDecompressorRepository.java b/tests/test_data/std/jdk/internal/jimage/decompressor/ResourceDecompressorRepository.java
new file mode 100644
index 00000000..859f7a03
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/jimage/decompressor/ResourceDecompressorRepository.java
@@ -0,0 +1,74 @@
+/*
+ * Copyright (c) 2015, 2024, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package jdk.internal.jimage.decompressor;
+
+import java.io.IOException;
+import java.util.HashMap;
+import java.util.Map;
+
+/**
+ *
+ * JLink Decompressors. All decompressors must be registered in the static
+ * initializer of this class.
+ *
+ * @implNote This class needs to maintain JDK 8 source compatibility.
+ *
+ * It is used internally in the JDK to implement jimage/jrtfs access,
+ * but also compiled and delivered as part of the jrtfs.jar to support access
+ * to the jimage file provided by the shipped JDK by tools running on JDK 8.
+ */
+public final class ResourceDecompressorRepository {
+
+    private ResourceDecompressorRepository() {
+    }
+
+    private static final Map<String, ResourceDecompressorFactory> factories = new HashMap<>();
+
+    static {
+        registerReaderProvider(new ZipDecompressorFactory());
+        registerReaderProvider(new StringSharingDecompressorFactory());
+    }
+
+    /**
+     * Build a new decompressor for the passed name.
+     * @param name The plugin name to build.
+     * @return A decompressor or null if not found
+     * @throws IOException
+     */
+    public static ResourceDecompressor newResourceDecompressor(String name) throws IOException {
+
+        ResourceDecompressorFactory fact = factories.get(name);
+        if (fact != null) {
+            return fact.newDecompressor();
+        }
+        return null;
+    }
+
+    private static void registerReaderProvider(ResourceDecompressorFactory factory) {
+        factories.put(factory.getName(), factory);
+    }
+
+
+}
diff --git a/tests/test_data/std/jdk/internal/jimage/decompressor/SignatureParser$ParseResult.class b/tests/test_data/std/jdk/internal/jimage/decompressor/SignatureParser$ParseResult.class
new file mode 100644
index 0000000000000000000000000000000000000000..96cf535358ca1192247127cf7f57600100583156
GIT binary patch
literal 672
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/jimage/decompressor/SignatureParser.class b/tests/test_data/std/jdk/internal/jimage/decompressor/SignatureParser.class
new file mode 100644
index 0000000000000000000000000000000000000000..a6e16f622d9dfcf0a8f4614d684a2b4aa09c1699
GIT binary patch
literal 2638
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/jimage/decompressor/SignatureParser.java b/tests/test_data/std/jdk/internal/jimage/decompressor/SignatureParser.java
new file mode 100644
index 00000000..9b65995f
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/jimage/decompressor/SignatureParser.java
@@ -0,0 +1,129 @@
+/*
+ * Copyright (c) 2015, 2016, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package jdk.internal.jimage.decompressor;
+
+import java.util.ArrayList;
+import java.util.List;
+
+/**
+ *
+ * A descriptor parser used to extract java type strings from
+ * UTF_8 descriptors.
+ *
+ * @implNote This class needs to maintain JDK 8 source compatibility.
+ *
+ * It is used internally in the JDK to implement jimage/jrtfs access,
+ * but also compiled and delivered as part of the jrtfs.jar to support access
+ * to the jimage file provided by the shipped JDK by tools running on JDK 8.
+ */
+public class SignatureParser {
+
+   public static class ParseResult {
+
+        public final List<String> types = new ArrayList<>();
+        public String formatted;
+        private ParseResult() {}
+    }
+
+    private SignatureParser() {}
+
+    public static String reconstruct(String formatted, List<String> arguments) {
+        int arg_index = 0;
+        char[] chars = formatted.toCharArray();
+        StringBuilder out = new StringBuilder();
+
+        for (int i = 0; i < chars.length; i++) {
+            char c = chars[i];
+            out.append(c);
+            switch (c) {
+                case 'L': {
+                    String pkg = arguments.get(arg_index);
+                    if(!pkg.isEmpty()) {
+                        out.append(pkg).append("/");
+                    }
+                    arg_index+=1;
+                    out.append(arguments.get(arg_index));
+                    arg_index+=1;
+                    break;
+                }
+                default: {
+                    break;
+                }
+            }
+        }
+        return out.toString();
+    }
+
+    public static ParseResult parseSignatureDescriptor(String str) {
+        ParseResult res = new ParseResult();
+        char[] chars = str.toCharArray();
+        StringBuilder type = null;
+        StringBuilder formatted = new StringBuilder();
+        for (int i = 0; i < chars.length; i++) {
+            char c = chars[i];
+            switch (c) {
+                case ';':
+                case ':':
+                case '<': {
+                    if(type != null) {
+                        String fullName = type.toString();
+                        int endIndex = fullName.lastIndexOf("/");
+                        String clazz = fullName;
+                        String pkg = "";
+                        if(endIndex != -1) {
+                            pkg = fullName.substring(0, endIndex);
+                            clazz = fullName.substring(endIndex+1);
+                        }
+                        res.types.add(pkg);
+                        res.types.add(clazz);
+                    }
+                    formatted.append(c);
+
+                    type = null;
+                    break;
+                }
+                case 'L': {
+                    if(type == null) {
+                        type = new StringBuilder();
+                        formatted.append(c);
+                    } else {
+                        type.append(c);
+                    }
+                    break;
+                }
+                default: {
+                    if(type == null) {
+                        formatted.append(c);
+                    } else {
+                        type.append(c);
+                    }
+                    break;
+                }
+            }
+        }
+        res.formatted = formatted.toString();
+        return res;
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/jimage/decompressor/StringSharingDecompressor.class b/tests/test_data/std/jdk/internal/jimage/decompressor/StringSharingDecompressor.class
new file mode 100644
index 0000000000000000000000000000000000000000..d5858899ecc6518cd0629c75ac021b9e554da76f
GIT binary patch
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/jimage/decompressor/StringSharingDecompressor.java b/tests/test_data/std/jdk/internal/jimage/decompressor/StringSharingDecompressor.java
new file mode 100644
index 00000000..6fc90319
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/jimage/decompressor/StringSharingDecompressor.java
@@ -0,0 +1,237 @@
+/*
+ * Copyright (c) 2015, 2024, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package jdk.internal.jimage.decompressor;
+
+import java.io.ByteArrayInputStream;
+import java.io.ByteArrayOutputStream;
+import java.io.DataInputStream;
+import java.io.DataOutputStream;
+import java.io.IOException;
+import java.nio.ByteBuffer;
+import java.nio.ByteOrder;
+import java.util.Arrays;
+import java.util.List;
+
+/**
+ *
+ * A Decompressor that reconstructs the constant pool of classes.
+ *
+ * @implNote This class needs to maintain JDK 8 source compatibility.
+ *
+ * It is used internally in the JDK to implement jimage/jrtfs access,
+ * but also compiled and delivered as part of the jrtfs.jar to support access
+ * to the jimage file provided by the shipped JDK by tools running on JDK 8.
+ */
+public class StringSharingDecompressor implements ResourceDecompressor {
+
+    public static final int EXTERNALIZED_STRING = 23;
+    public static final int EXTERNALIZED_STRING_DESCRIPTOR = 25;
+
+    private static final int CONSTANT_Utf8 = 1;
+    private static final int CONSTANT_Integer = 3;
+    private static final int CONSTANT_Float = 4;
+    private static final int CONSTANT_Long = 5;
+    private static final int CONSTANT_Double = 6;
+    private static final int CONSTANT_Class = 7;
+    private static final int CONSTANT_String = 8;
+    private static final int CONSTANT_Fieldref = 9;
+    private static final int CONSTANT_Methodref = 10;
+    private static final int CONSTANT_InterfaceMethodref = 11;
+    private static final int CONSTANT_NameAndType = 12;
+    private static final int CONSTANT_MethodHandle = 15;
+    private static final int CONSTANT_MethodType = 16;
+    private static final int CONSTANT_InvokeDynamic = 18;
+    private static final int CONSTANT_Module = 19;
+    private static final int CONSTANT_Package = 20;
+
+    private static final int[] SIZES = new int[21];
+
+    static {
+
+        //SIZES[CONSTANT_Utf8] = XXX;
+        SIZES[CONSTANT_Integer] = 4;
+        SIZES[CONSTANT_Float] = 4;
+        SIZES[CONSTANT_Long] = 8;
+        SIZES[CONSTANT_Double] = 8;
+        SIZES[CONSTANT_Class] = 2;
+        SIZES[CONSTANT_String] = 2;
+        SIZES[CONSTANT_Fieldref] = 4;
+        SIZES[CONSTANT_Methodref] = 4;
+        SIZES[CONSTANT_InterfaceMethodref] = 4;
+        SIZES[CONSTANT_NameAndType] = 4;
+        SIZES[CONSTANT_MethodHandle] = 3;
+        SIZES[CONSTANT_MethodType] = 2;
+        SIZES[CONSTANT_InvokeDynamic] = 4;
+        SIZES[CONSTANT_Module] = 2;
+        SIZES[CONSTANT_Package] = 2;
+    }
+
+    public static int[] getSizes() {
+        return SIZES.clone();
+    }
+
+    @SuppressWarnings("fallthrough")
+    public static byte[] normalize(StringsProvider provider, byte[] transformed,
+            int offset) throws IOException {
+        DataInputStream stream = new DataInputStream(new ByteArrayInputStream(transformed,
+                offset, transformed.length - offset));
+        ByteArrayOutputStream outStream = new ByteArrayOutputStream(transformed.length);
+        DataOutputStream out = new DataOutputStream(outStream);
+        byte[] header = new byte[8]; //maginc/4, minor/2, major/2
+        stream.readFully(header);
+        out.write(header);
+        int count = stream.readUnsignedShort();
+        out.writeShort(count);
+        for (int i = 1; i < count; i++) {
+            int tag = stream.readUnsignedByte();
+            byte[] arr;
+            switch (tag) {
+                case CONSTANT_Utf8: {
+                    out.write(tag);
+                    String utf = stream.readUTF();
+                    out.writeUTF(utf);
+                    break;
+                }
+
+                case EXTERNALIZED_STRING: {
+                    int index = CompressIndexes.readInt(stream);
+                    String orig = provider.getString(index);
+                    out.write(CONSTANT_Utf8);
+                    out.writeUTF(orig);
+                    break;
+                }
+
+                case EXTERNALIZED_STRING_DESCRIPTOR: {
+                    String orig = reconstruct(provider, stream);
+                    out.write(CONSTANT_Utf8);
+                    out.writeUTF(orig);
+                    break;
+                }
+                case CONSTANT_Long:
+                case CONSTANT_Double: {
+                    i++;
+                }
+                default: {
+                    out.write(tag);
+                    int size = SIZES[tag];
+                    arr = new byte[size];
+                    stream.readFully(arr);
+                    out.write(arr);
+                }
+            }
+        }
+        out.write(transformed, transformed.length - stream.available(),
+                stream.available());
+        out.flush();
+
+        return outStream.toByteArray();
+    }
+
+    private static String reconstruct(StringsProvider reader, DataInputStream cr)
+            throws IOException {
+        int descIndex = CompressIndexes.readInt(cr);
+        String desc = reader.getString(descIndex);
+        byte[] encodedDesc = getEncoded(desc);
+        int indexes_length = CompressIndexes.readInt(cr);
+        byte[] bytes = new byte[indexes_length];
+        cr.readFully(bytes);
+        List<Integer> indices = CompressIndexes.decompressFlow(bytes);
+        ByteBuffer buffer = ByteBuffer.allocate(encodedDesc.length * 2);
+        buffer.order(ByteOrder.BIG_ENDIAN);
+        int argIndex = 0;
+        for (byte c : encodedDesc) {
+            if (c == 'L') {
+                buffer = safeAdd(buffer, c);
+                int index = indices.get(argIndex);
+                argIndex += 1;
+                String pkg = reader.getString(index);
+                if (!pkg.isEmpty()) {
+                    pkg = pkg + "/";
+                    byte[] encoded = getEncoded(pkg);
+                    buffer = safeAdd(buffer, encoded);
+                }
+                int classIndex = indices.get(argIndex);
+                argIndex += 1;
+                String clazz = reader.getString(classIndex);
+                byte[] encoded = getEncoded(clazz);
+                buffer = safeAdd(buffer, encoded);
+            } else {
+                buffer = safeAdd(buffer, c);
+            }
+        }
+
+        byte[] encoded = buffer.array();
+        ByteBuffer result = ByteBuffer.allocate(encoded.length + 2);
+        result.order(ByteOrder.BIG_ENDIAN);
+        result.putShort((short) buffer.position());
+        result.put(encoded, 0, buffer.position());
+        ByteArrayInputStream stream = new ByteArrayInputStream(result.array());
+        DataInputStream inStream = new DataInputStream(stream);
+        String str = inStream.readUTF();
+        return str;
+    }
+
+    public static byte[] getEncoded(String pre) throws IOException {
+        ByteArrayOutputStream resultStream = new ByteArrayOutputStream();
+        DataOutputStream resultOut = new DataOutputStream(resultStream);
+        resultOut.writeUTF(pre);
+        byte[] content = resultStream.toByteArray();
+        // first 2 items are length;
+        if (content.length <= 2) {
+            return new byte[0];
+        }
+        return Arrays.copyOfRange(content, 2, content.length);
+    }
+
+    private static ByteBuffer safeAdd(ByteBuffer current, byte b) {
+        byte[] bytes = {b};
+        return safeAdd(current, bytes);
+    }
+
+    private static ByteBuffer safeAdd(ByteBuffer current, byte[] bytes) {
+        if (current.remaining() < bytes.length) {
+            ByteBuffer newBuffer = ByteBuffer.allocate((current.capacity()
+                    + bytes.length) * 2);
+            newBuffer.order(ByteOrder.BIG_ENDIAN);
+            newBuffer.put(current.array(), 0, current.position());
+            current = newBuffer;
+        }
+        current.put(bytes);
+        return current;
+    }
+
+    @Override
+    public String getName() {
+        return StringSharingDecompressorFactory.NAME;
+    }
+
+    public StringSharingDecompressor() {}
+
+    @Override
+    public byte[] decompress(StringsProvider reader, byte[] content,
+            int offset, long originalSize) throws Exception {
+        return normalize(reader, content, offset);
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/jimage/decompressor/StringSharingDecompressorFactory.class b/tests/test_data/std/jdk/internal/jimage/decompressor/StringSharingDecompressorFactory.class
new file mode 100644
index 0000000000000000000000000000000000000000..4bbe1c60f907567169729fd35fe19cf0764649b5
GIT binary patch
literal 801
zcmbVKTT22_5dMyuYpZ72{Z0>oc3TR1=t3Z-5ST%R(BpAE*s=Aj?5<t@RXqg-{eXT{
zG`lPzqzFBnGduImd^7W%{rZ0Y1W?4fh6qEU-MlxX@`R(fWwd37w}jCYrrqf}!gX!O
zsCkZ5t=b*;&3PYE=B8&m&k4jBbiaW7U9+nr4oyQMg>mQ%rz0C&3)k*BrWnA@5I>bl
zdS?u?xk{TqaKqxN70z^$uWLv#9FJ@<bO#+tO!$*#7^1m+ogr2&T$UKJf4ecHi?(t-
zuDm+8dV+F`c9Tq|B9*B2It}66@P<W^Y{fRYRVT@OKMcmaJLxhMEB_xil>CHxD)HDa
z7{gI6Kbm=v*2Jclo=nm8B(0}mg<(37TH40N)h|L>wcwq~(qD0NsHWkNdp-v?KyOI@
z8^a<dF-0~@UIbA(%-5anX^I>MKA>%7qi+~{4U%T))(HT%iDU<}^p&ClO2ZuH$ucYu
paU`HP2q_XDNZ!67{X%#IK1V#L+3%}Qg!M~=#t2=evl`^D{Qz0y*2w?>

literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/jimage/decompressor/StringSharingDecompressorFactory.java b/tests/test_data/std/jdk/internal/jimage/decompressor/StringSharingDecompressorFactory.java
new file mode 100644
index 00000000..ecdf15fc
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/jimage/decompressor/StringSharingDecompressorFactory.java
@@ -0,0 +1,51 @@
+/*
+ * Copyright (c) 2015, 2024, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package jdk.internal.jimage.decompressor;
+
+import java.io.IOException;
+
+/**
+ *
+ * Constant Pool strings sharing Decompressor factory.
+ *
+ * @implNote This class needs to maintain JDK 8 source compatibility.
+ *
+ * It is used internally in the JDK to implement jimage/jrtfs access,
+ * but also compiled and delivered as part of the jrtfs.jar to support access
+ * to the jimage file provided by the shipped JDK by tools running on JDK 8.
+ */
+public class StringSharingDecompressorFactory extends ResourceDecompressorFactory {
+
+    public static final String NAME = "compact-cp";
+    public StringSharingDecompressorFactory() {
+        super(NAME);
+    }
+
+    @Override
+    public ResourceDecompressor newDecompressor()
+            throws IOException {
+        return new StringSharingDecompressor();
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/jimage/decompressor/ZipDecompressor.class b/tests/test_data/std/jdk/internal/jimage/decompressor/ZipDecompressor.class
new file mode 100644
index 0000000000000000000000000000000000000000..51b214f086717ff3268fa4fd29c93dd7c4e34350
GIT binary patch
literal 1829
zcmb_dUsD@Z96dMLWJ6{d+B8H0rKYvkfV4}|Qiakg6zU?73YC%a;<CAfrO9sG-E^cc
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z>d*|NkQO+zYd^Nly6x4>%GR!QB7yWR*K?!W0?G2ox{i#%&E4uF)Ab@5cy`^~bsKg~
znpNrejb<Rj&=1UqZu9Q3`vu#H{9rGGEUP?mn>q}Ev)xBotW}diijeT#;o+f<GXjHM
zf29>wwwGmtHRglB4>HIJ46n*>T5ce#B|8Z0y;A5tk)_D@OLaS_$t?PiSETv{`pZk*
zT5D0@dbMdq<t>3i>}W-9-6Ss4^0w<Xd1X;RQZ0i9hHzdW6UxZ)nl0*~mp5lEYlO-b
zaKXUaDAB!5jlvySja7Q6T$c>IgUbwe+cl38E#<vp;60^xQhHS#BLe4QAg*s(mHBTS
z*^FG@%iw*13#&5pTY)1>j!&7qs7<uth7CJ%cCsiVpT#wpI>rrL$ArN6|Lu=Jw%b0k
zQ4AMHHfMEwC~)J{YX2fU-f{tL&aX;=z9rX_E3L+s3?A59by{*uzGK(d?Z8#{9itZQ
zxS_zr(y327F<a9VwkD$$yTQ`=^2qD0X28~7Bty#+NNmn>qW$e{_ESJu0)`*BHJ5|D
z#`&RXk^JLu4js3h?gat^?aHss3IU`XzvVHycP+A=N6U6ICZ%JB!X9-q)WO>AKF0^_
z$RkkUgr0V${!8V{?P(702mWKXDud}x<H#|PHVp#z-cV(#*cm`-)}0nL^4Ya`Ko?xq
z-TaCETvLP16wC8uFju$3P*RBp0`qT#F$e5~1{mjQNI>8NzD+d#`C{YU4em@{g|dw9
zL;TK70+U>o8$3rhxf<;Ne1wmACoqL+t}6K|uPQE?>-mkB<EdlEQj?w3j5>>qVyfun
zBXs68OL_D@{RO=*(6^C0yN`1(OF#UXnbKaMu(6MUsZ=pFIy8DPRDFhGaxz^^J;U%%
zxYVEizV!5G4EEDf)VOK~{b|Nr{CYC|>*3!j?A<u#M^(DKkt4scmqktCOvV%^NDNd)
zp~_L20phwy&lu5~q<V)$*D-@l?i_rA2EPqTj@v{|+_*)b`ZZ~}6U)$K)TiV(fUhu1
zuf}>6X5FRUCOz|vOJjjKeb92Ra9+nf9R+cvfX`^uSj6K0IzDfUggR|XBx7v2pgqUc
zsdO>j6<U3#z>FR&9s_1{#8!P<!g37EzzX50Xd?!jjCTsG#_S|P&Jb7^Ljw01k-!&N
O<u%J1YZU0qbk9Gl7`rC`

literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/jimage/decompressor/ZipDecompressor.java b/tests/test_data/std/jdk/internal/jimage/decompressor/ZipDecompressor.java
new file mode 100644
index 00000000..f8e9d46a
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/jimage/decompressor/ZipDecompressor.java
@@ -0,0 +1,76 @@
+/*
+ * Copyright (c) 2015, 2024, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package jdk.internal.jimage.decompressor;
+
+import java.io.IOException;
+import java.util.zip.Inflater;
+
+/**
+ *
+ * ZIP Decompressor
+ *
+ * @implNote This class needs to maintain JDK 8 source compatibility.
+ *
+ * It is used internally in the JDK to implement jimage/jrtfs access,
+ * but also compiled and delivered as part of the jrtfs.jar to support access
+ * to the jimage file provided by the shipped JDK by tools running on JDK 8.
+ */
+final class ZipDecompressor implements ResourceDecompressor {
+
+    @Override
+    public String getName() {
+        return ZipDecompressorFactory.NAME;
+    }
+
+    static byte[] decompress(byte[] bytesIn, int offset, long originalSize) throws Exception {
+        if (originalSize > Integer.MAX_VALUE) {
+            throw new OutOfMemoryError("Required array size too large");
+        }
+        byte[] bytesOut = new byte[(int) originalSize];
+
+        Inflater inflater = new Inflater();
+        inflater.setInput(bytesIn, offset, bytesIn.length - offset);
+
+        int count = 0;
+        while (!inflater.finished() && count < originalSize) {
+            count += inflater.inflate(bytesOut, count, bytesOut.length - count);
+        }
+
+        inflater.end();
+
+        if (count != originalSize) {
+            throw new IOException("Resource content size mismatch");
+        }
+
+        return bytesOut;
+    }
+
+    @Override
+    public byte[] decompress(StringsProvider reader, byte[] content, int offset,
+            long originalSize) throws Exception {
+        byte[] decompressed = decompress(content, offset, originalSize);
+        return decompressed;
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/jimage/decompressor/ZipDecompressorFactory.class b/tests/test_data/std/jdk/internal/jimage/decompressor/ZipDecompressorFactory.class
new file mode 100644
index 0000000000000000000000000000000000000000..132be2f39cf45f15acda3b856d9c6185099cd8b3
GIT binary patch
literal 754
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icT8QqV)~i#5%?VOpr$xfp9t$$DI23~mezWJ-}naG;ltAa

literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/jimage/decompressor/ZipDecompressorFactory.java b/tests/test_data/std/jdk/internal/jimage/decompressor/ZipDecompressorFactory.java
new file mode 100644
index 00000000..b57ddc42
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/jimage/decompressor/ZipDecompressorFactory.java
@@ -0,0 +1,50 @@
+/*
+ * Copyright (c) 2015, 2024, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package jdk.internal.jimage.decompressor;
+
+import java.io.IOException;
+
+/**
+ *
+ * ZIP decompressor factory
+ *
+ * @implNote This class needs to maintain JDK 8 source compatibility.
+ *
+ * It is used internally in the JDK to implement jimage/jrtfs access,
+ * but also compiled and delivered as part of the jrtfs.jar to support access
+ * to the jimage file provided by the shipped JDK by tools running on JDK 8.
+ */
+public final class ZipDecompressorFactory extends ResourceDecompressorFactory {
+    public static final String NAME = "zip";
+    public ZipDecompressorFactory() {
+        super(NAME);
+    }
+
+    @Override
+    public ResourceDecompressor newDecompressor()
+            throws IOException {
+        return new ZipDecompressor();
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/jmod/JmodFile$Entry.class b/tests/test_data/std/jdk/internal/jmod/JmodFile$Entry.class
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HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/jmod/JmodFile$Section.class b/tests/test_data/std/jdk/internal/jmod/JmodFile$Section.class
new file mode 100644
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GIT binary patch
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HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/jmod/JmodFile.class b/tests/test_data/std/jdk/internal/jmod/JmodFile.class
new file mode 100644
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GIT binary patch
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/jmod/JmodFile.java b/tests/test_data/std/jdk/internal/jmod/JmodFile.java
new file mode 100644
index 00000000..987d68f0
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/jmod/JmodFile.java
@@ -0,0 +1,240 @@
+/*
+ * Copyright (c) 2016, 2017, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package jdk.internal.jmod;
+
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.OutputStream;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.util.Arrays;
+import java.util.Map;
+import java.util.function.Function;
+import java.util.stream.Collectors;
+import java.util.stream.Stream;
+import java.util.zip.ZipEntry;
+import java.util.zip.ZipFile;
+
+/**
+ * Helper class to read JMOD file
+ */
+public class JmodFile implements AutoCloseable {
+    // jmod magic number and version number
+    private static final int JMOD_MAJOR_VERSION = 0x01;
+    private static final int JMOD_MINOR_VERSION = 0x00;
+    private static final byte[] JMOD_MAGIC_NUMBER = {
+        0x4A, 0x4D, /* JM */
+        JMOD_MAJOR_VERSION, JMOD_MINOR_VERSION, /* version 1.0 */
+    };
+
+    public static void checkMagic(Path file) throws IOException {
+        try (InputStream in = Files.newInputStream(file)) {
+            // validate the header
+            byte[] magic = in.readNBytes(4);
+            if (magic.length != 4) {
+                throw new IOException("Invalid JMOD file: " + file);
+            }
+            if (magic[0] != JMOD_MAGIC_NUMBER[0] ||
+                magic[1] != JMOD_MAGIC_NUMBER[1]) {
+                throw new IOException("Invalid JMOD file: " + file.toString());
+            }
+            if (magic[2] > JMOD_MAJOR_VERSION ||
+                (magic[2] == JMOD_MAJOR_VERSION && magic[3] > JMOD_MINOR_VERSION)) {
+                throw new IOException("Unsupported jmod version: " +
+                    magic[2] + "." + magic[3] + " in " + file.toString());
+            }
+        }
+    }
+
+    /**
+     * JMOD sections
+     */
+    public static enum Section {
+        CLASSES("classes"),
+        CONFIG("conf"),
+        HEADER_FILES("include"),
+        LEGAL_NOTICES("legal"),
+        MAN_PAGES("man"),
+        NATIVE_LIBS("lib"),
+        NATIVE_CMDS("bin");
+
+        private final String jmodDir;
+        private Section(String jmodDir) {
+            this.jmodDir = jmodDir;
+        }
+
+        /**
+         * Returns the directory name in the JMOD file corresponding to
+         * this section
+         */
+        public String jmodDir() { return jmodDir; }
+    }
+
+    /**
+     * JMOD file entry.
+     *
+     * Each entry corresponds to a ZipEntry whose name is:
+     *   Section::jmodDir + '/' + name
+     */
+    public static class Entry {
+        private final ZipEntry zipEntry;
+        private final Section section;
+        private final String name;
+
+        private Entry(ZipEntry e) {
+            String name = e.getName();
+            int i = name.indexOf('/');
+            if (i <= 1) {
+                throw new RuntimeException("invalid jmod entry: " + name);
+            }
+
+            this.zipEntry = e;
+            this.section = section(name.substring(0, i));
+            this.name = name.substring(i+1);
+        }
+
+        /**
+         * Returns the section of this entry.
+         */
+        public Section section() {
+            return section;
+        }
+
+        /**
+         * Returns the name of this entry.
+         */
+        public String name() {
+            return name;
+        }
+
+        /**
+         * Returns true if the entry is a directory in the JMOD file.
+         */
+        public boolean isDirectory() {
+            return zipEntry.isDirectory();
+        }
+
+        /**
+         * Returns the size of this entry.
+         */
+        public long size() {
+            return zipEntry.getSize();
+        }
+
+        public ZipEntry zipEntry() {
+            return zipEntry;
+        }
+
+        @Override
+        public String toString() {
+            return section.jmodDir() + "/" + name;
+        }
+
+        /*
+         * A map from the jmodDir name to Section
+         */
+        static final Map<String, Section> NAME_TO_SECTION =
+            Arrays.stream(Section.values())
+                  .collect(Collectors.toMap(Section::jmodDir, Function.identity()));
+
+        static Section section(String name) {
+            if (!NAME_TO_SECTION.containsKey(name)) {
+                throw new IllegalArgumentException("invalid section: " + name);
+
+            }
+            return NAME_TO_SECTION.get(name);
+        }
+
+    }
+
+    private final Path file;
+    private final ZipFile zipfile;
+
+    /**
+     * Constructs a {@code JmodFile} from a given path.
+     */
+    public JmodFile(Path file) throws IOException {
+        checkMagic(file);
+        this.file = file;
+        this.zipfile = new ZipFile(file.toFile());
+    }
+
+    public static void writeMagicNumber(OutputStream os) throws IOException {
+        os.write(JMOD_MAGIC_NUMBER);
+    }
+
+    /**
+     * Returns the {@code Entry} for a resource in a JMOD file section
+     * or {@code null} if not found.
+     */
+    public Entry getEntry(Section section, String name) {
+        String entry = section.jmodDir() + "/" + name;
+        ZipEntry ze = zipfile.getEntry(entry);
+        return (ze != null) ? new Entry(ze) : null;
+    }
+
+    /**
+     * Opens an {@code InputStream} for reading the named entry of the given
+     * section in this JMOD file.
+     *
+     * @throws IOException if the named entry is not found, or I/O error
+     *         occurs when reading it
+     */
+    public InputStream getInputStream(Section section, String name)
+        throws IOException
+    {
+        String entry = section.jmodDir() + "/" + name;
+        ZipEntry e = zipfile.getEntry(entry);
+        if (e == null) {
+            throw new IOException(name + " not found: " + file);
+        }
+        return zipfile.getInputStream(e);
+    }
+
+    /**
+     * Opens an {@code InputStream} for reading an entry in the JMOD file.
+     *
+     * @throws IOException if an I/O error occurs
+     */
+    public InputStream getInputStream(Entry entry) throws IOException {
+        return zipfile.getInputStream(entry.zipEntry());
+    }
+
+    /**
+     * Returns a stream of entries in this JMOD file.
+     */
+    public Stream<Entry> stream() {
+        return zipfile.stream()
+                      .map(Entry::new);
+    }
+
+    @Override
+    public void close() throws IOException {
+        if (zipfile != null) {
+            zipfile.close();
+        }
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/jrtfs/ExplodedImage$PathNode.class b/tests/test_data/std/jdk/internal/jrtfs/ExplodedImage$PathNode.class
new file mode 100644
index 0000000000000000000000000000000000000000..842362b3cd67641cf1052a2680787d4cf5c6c694
GIT binary patch
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HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/jrtfs/ExplodedImage.class b/tests/test_data/std/jdk/internal/jrtfs/ExplodedImage.class
new file mode 100644
index 0000000000000000000000000000000000000000..36826f7882626a0d22ef4e08fad488a34213c406
GIT binary patch
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HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/jrtfs/ExplodedImage.java b/tests/test_data/std/jdk/internal/jrtfs/ExplodedImage.java
new file mode 100644
index 00000000..e2c17f8c
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/jrtfs/ExplodedImage.java
@@ -0,0 +1,308 @@
+/*
+ * Copyright (c) 2015, 2022, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package jdk.internal.jrtfs;
+
+import java.io.IOException;
+import java.io.UncheckedIOException;
+import java.nio.file.DirectoryStream;
+import java.nio.file.FileSystem;
+import java.nio.file.FileSystemException;
+import java.nio.file.FileSystems;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.nio.file.attribute.BasicFileAttributes;
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import java.util.stream.Stream;
+
+import jdk.internal.jimage.ImageReader.Node;
+
+/**
+ * A jrt file system built on $JAVA_HOME/modules directory ('exploded modules
+ * build')
+ *
+ * @implNote This class needs to maintain JDK 8 source compatibility.
+ *
+ * It is used internally in the JDK to implement jimage/jrtfs access,
+ * but also compiled and delivered as part of the jrtfs.jar to support access
+ * to the jimage file provided by the shipped JDK by tools running on JDK 8.
+ */
+class ExplodedImage extends SystemImage {
+
+    private static final String MODULES = "/modules/";
+    private static final String PACKAGES = "/packages/";
+    private static final int PACKAGES_LEN = PACKAGES.length();
+
+    private final FileSystem defaultFS;
+    private final String separator;
+    private final Map<String, PathNode> nodes = Collections.synchronizedMap(new HashMap<>());
+    private final BasicFileAttributes modulesDirAttrs;
+
+    ExplodedImage(Path modulesDir) throws IOException {
+        defaultFS = FileSystems.getDefault();
+        String str = defaultFS.getSeparator();
+        separator = str.equals("/") ? null : str;
+        modulesDirAttrs = Files.readAttributes(modulesDir, BasicFileAttributes.class);
+        initNodes();
+    }
+
+    // A Node that is backed by actual default file system Path
+    private final class PathNode extends Node {
+
+        // Path in underlying default file system
+        private Path path;
+        private PathNode link;
+        private List<Node> children;
+
+        PathNode(String name, Path path, BasicFileAttributes attrs) {  // path
+            super(name, attrs);
+            this.path = path;
+        }
+
+        PathNode(String name, Node link) {              // link
+            super(name, link.getFileAttributes());
+            this.link = (PathNode)link;
+        }
+
+        PathNode(String name, List<Node> children) {    // dir
+            super(name, modulesDirAttrs);
+            this.children = children;
+        }
+
+        @Override
+        public boolean isDirectory() {
+            return children != null ||
+                   (link == null && getFileAttributes().isDirectory());
+        }
+
+        @Override
+        public boolean isLink() {
+            return link != null;
+        }
+
+        @Override
+        public PathNode resolveLink(boolean recursive) {
+            if (link == null)
+                return this;
+            return recursive && link.isLink() ? link.resolveLink(true) : link;
+        }
+
+        byte[] getContent() throws IOException {
+            if (!getFileAttributes().isRegularFile())
+                throw new FileSystemException(getName() + " is not file");
+            return Files.readAllBytes(path);
+        }
+
+        @Override
+        public List<Node> getChildren() {
+            if (!isDirectory())
+                throw new IllegalArgumentException("not a directory: " + getNameString());
+            if (children == null) {
+                List<Node> list = new ArrayList<>();
+                try (DirectoryStream<Path> stream = Files.newDirectoryStream(path)) {
+                    for (Path p : stream) {
+                        p = explodedModulesDir.relativize(p);
+                        String pName = MODULES + nativeSlashToFrontSlash(p.toString());
+                        Node node = findNode(pName);
+                        if (node != null) {  // findNode may choose to hide certain files!
+                            list.add(node);
+                        }
+                    }
+                } catch (IOException x) {
+                    return null;
+                }
+                children = list;
+            }
+            return children;
+        }
+
+        @Override
+        public long size() {
+            try {
+                return isDirectory() ? 0 : Files.size(path);
+            } catch (IOException ex) {
+                throw new UncheckedIOException(ex);
+            }
+        }
+    }
+
+    @Override
+    public void close() throws IOException {
+        nodes.clear();
+    }
+
+    @Override
+    public byte[] getResource(Node node) throws IOException {
+        return ((PathNode)node).getContent();
+    }
+
+    // find Node for the given Path
+    @Override
+    public synchronized Node findNode(String str) {
+        Node node = findModulesNode(str);
+        if (node != null) {
+            return node;
+        }
+        // lazily created for paths like /packages/<package>/<module>/xyz
+        // For example /packages/java.lang/java.base/java/lang/
+        if (str.startsWith(PACKAGES)) {
+            // pkgEndIdx marks end of <package> part
+            int pkgEndIdx = str.indexOf('/', PACKAGES_LEN);
+            if (pkgEndIdx != -1) {
+                // modEndIdx marks end of <module> part
+                int modEndIdx = str.indexOf('/', pkgEndIdx + 1);
+                if (modEndIdx != -1) {
+                    // make sure we have such module link!
+                    // ie., /packages/<package>/<module> is valid
+                    Node linkNode = nodes.get(str.substring(0, modEndIdx));
+                    if (linkNode == null || !linkNode.isLink()) {
+                        return null;
+                    }
+                    // map to "/modules/zyz" path and return that node
+                    // For example, "/modules/java.base/java/lang" for
+                    // "/packages/java.lang/java.base/java/lang".
+                    String mod = MODULES + str.substring(pkgEndIdx + 1);
+                    return findModulesNode(mod);
+                }
+            }
+        }
+        return null;
+    }
+
+    // find a Node for a path that starts like "/modules/..."
+    Node findModulesNode(String str) {
+        PathNode node = nodes.get(str);
+        if (node != null) {
+            return node;
+        }
+        // lazily created "/modules/xyz/abc/" Node
+        // This is mapped to default file system path "<JDK_MODULES_DIR>/xyz/abc"
+        Path p = underlyingPath(str);
+        if (p != null) {
+            try {
+                BasicFileAttributes attrs = Files.readAttributes(p, BasicFileAttributes.class);
+                if (attrs.isRegularFile()) {
+                    Path f = p.getFileName();
+                    if (f.toString().startsWith("_the."))
+                        return null;
+                }
+                node = new PathNode(str, p, attrs);
+                nodes.put(str, node);
+                return node;
+            } catch (IOException x) {
+                // does not exists or unable to determine
+            }
+        }
+        return null;
+    }
+
+    Path underlyingPath(String str) {
+        if (str.startsWith(MODULES)) {
+            str = frontSlashToNativeSlash(str.substring("/modules".length()));
+            return defaultFS.getPath(explodedModulesDir.toString(), str);
+        }
+        return null;
+    }
+
+    // convert "/" to platform path separator
+    private String frontSlashToNativeSlash(String str) {
+        return separator == null ? str : str.replace("/", separator);
+    }
+
+    // convert platform path separator to "/"
+    private String nativeSlashToFrontSlash(String str) {
+        return separator == null ? str : str.replace(separator, "/");
+    }
+
+    // convert "/"s to "."s
+    private String slashesToDots(String str) {
+        return str.replace(separator != null ? separator : "/", ".");
+    }
+
+    // initialize file system Nodes
+    private void initNodes() throws IOException {
+        // same package prefix may exist in multiple modules. This Map
+        // is filled by walking "jdk modules" directory recursively!
+        Map<String, List<String>> packageToModules = new HashMap<>();
+        try (DirectoryStream<Path> stream = Files.newDirectoryStream(explodedModulesDir)) {
+            for (Path module : stream) {
+                if (Files.isDirectory(module)) {
+                    String moduleName = module.getFileName().toString();
+                    // make sure "/modules/<moduleName>" is created
+                    findModulesNode(MODULES + moduleName);
+                    try (Stream<Path> contentsStream = Files.walk(module)) {
+                        contentsStream.filter(Files::isDirectory).forEach((p) -> {
+                            p = module.relativize(p);
+                            String pkgName = slashesToDots(p.toString());
+                            // skip META-INF and empty strings
+                            if (!pkgName.isEmpty() && !pkgName.startsWith("META-INF")) {
+                                List<String> moduleNames = packageToModules.get(pkgName);
+                                if (moduleNames == null) {
+                                    moduleNames = new ArrayList<>();
+                                    packageToModules.put(pkgName, moduleNames);
+                                }
+                                moduleNames.add(moduleName);
+                            }
+                        });
+                    }
+                }
+            }
+        }
+        // create "/modules" directory
+        // "nodes" map contains only /modules/<foo> nodes only so far and so add all as children of /modules
+        PathNode modulesDir = new PathNode("/modules", new ArrayList<>(nodes.values()));
+        nodes.put(modulesDir.getName(), modulesDir);
+
+        // create children under "/packages"
+        List<Node> packagesChildren = new ArrayList<>(packageToModules.size());
+        for (Map.Entry<String, List<String>> entry : packageToModules.entrySet()) {
+            String pkgName = entry.getKey();
+            List<String> moduleNameList = entry.getValue();
+            List<Node> moduleLinkNodes = new ArrayList<>(moduleNameList.size());
+            for (String moduleName : moduleNameList) {
+                Node moduleNode = findModulesNode(MODULES + moduleName);
+                PathNode linkNode = new PathNode(PACKAGES + pkgName + "/" + moduleName, moduleNode);
+                nodes.put(linkNode.getName(), linkNode);
+                moduleLinkNodes.add(linkNode);
+            }
+            PathNode pkgDir = new PathNode(PACKAGES + pkgName, moduleLinkNodes);
+            nodes.put(pkgDir.getName(), pkgDir);
+            packagesChildren.add(pkgDir);
+        }
+        // "/packages" dir
+        PathNode packagesDir = new PathNode("/packages", packagesChildren);
+        nodes.put(packagesDir.getName(), packagesDir);
+
+        // finally "/" dir!
+        List<Node> rootChildren = new ArrayList<>();
+        rootChildren.add(packagesDir);
+        rootChildren.add(modulesDir);
+        PathNode root = new PathNode("/", rootChildren);
+        nodes.put(root.getName(), root);
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/jrtfs/JrtDirectoryStream$1.class b/tests/test_data/std/jdk/internal/jrtfs/JrtDirectoryStream$1.class
new file mode 100644
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diff --git a/tests/test_data/std/jdk/internal/jrtfs/JrtDirectoryStream.class b/tests/test_data/std/jdk/internal/jrtfs/JrtDirectoryStream.class
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HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/jrtfs/JrtDirectoryStream.java b/tests/test_data/std/jdk/internal/jrtfs/JrtDirectoryStream.java
new file mode 100644
index 00000000..f2f2aa68
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/jrtfs/JrtDirectoryStream.java
@@ -0,0 +1,100 @@
+/*
+ * Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package jdk.internal.jrtfs;
+
+import java.nio.file.DirectoryStream;
+import java.nio.file.ClosedDirectoryStreamException;
+import java.nio.file.DirectoryIteratorException;
+import java.nio.file.NotDirectoryException;
+import java.nio.file.Path;
+import java.util.Iterator;
+import java.util.Objects;
+import java.util.NoSuchElementException;
+import java.io.IOException;
+
+/**
+ * DirectoryStream implementation for jrt file system implementations.
+ *
+ * @implNote This class needs to maintain JDK 8 source compatibility.
+ *
+ * It is used internally in the JDK to implement jimage/jrtfs access,
+ * but also compiled and delivered as part of the jrtfs.jar to support access
+ * to the jimage file provided by the shipped JDK by tools running on JDK 8.
+ */
+final class JrtDirectoryStream implements DirectoryStream<Path> {
+
+    private final JrtPath dir;
+    private final DirectoryStream.Filter<? super Path> filter;
+    private boolean isClosed;
+    private Iterator<Path> itr;
+
+    JrtDirectoryStream(JrtPath dir,
+            DirectoryStream.Filter<? super java.nio.file.Path> filter)
+            throws IOException
+    {
+        this.dir = dir;
+        if (!dir.jrtfs.isDirectory(dir, true)) {  // sanity check
+            throw new NotDirectoryException(dir.toString());
+        }
+        this.filter = filter;
+    }
+
+    @Override
+    public synchronized Iterator<Path> iterator() {
+        if (isClosed)
+            throw new ClosedDirectoryStreamException();
+        if (itr != null)
+            throw new IllegalStateException("Iterator has already been returned");
+        try {
+            itr = dir.jrtfs.iteratorOf(dir, filter);
+        } catch (IOException e) {
+            throw new IllegalStateException(e);
+        }
+        return new Iterator<Path>() {
+            @Override
+            public boolean hasNext() {
+                synchronized (JrtDirectoryStream.this) {
+                    if (isClosed)
+                        return false;
+                    return itr.hasNext();
+                }
+            }
+
+            @Override
+            public Path next() {
+                synchronized (JrtDirectoryStream.this) {
+                    if (isClosed)
+                        throw new NoSuchElementException();
+                    return itr.next();
+                }
+            }
+        };
+    }
+
+    @Override
+    public synchronized void close() throws IOException {
+        isClosed = true;
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/jrtfs/JrtFileAttributeView$AttrID.class b/tests/test_data/std/jdk/internal/jrtfs/JrtFileAttributeView$AttrID.class
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diff --git a/tests/test_data/std/jdk/internal/jrtfs/JrtFileAttributeView.java b/tests/test_data/std/jdk/internal/jrtfs/JrtFileAttributeView.java
new file mode 100644
index 00000000..874da943
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/jrtfs/JrtFileAttributeView.java
@@ -0,0 +1,198 @@
+/*
+ * Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package jdk.internal.jrtfs;
+
+import java.nio.file.LinkOption;
+import java.nio.file.attribute.*;
+import java.io.IOException;
+import java.util.LinkedHashMap;
+import java.util.Map;
+import java.util.Objects;
+
+/**
+ * File attribute view for jrt file system.
+ *
+ * @implNote This class needs to maintain JDK 8 source compatibility.
+ *
+ * It is used internally in the JDK to implement jimage/jrtfs access,
+ * but also compiled and delivered as part of the jrtfs.jar to support access
+ * to the jimage file provided by the shipped JDK by tools running on JDK 8.
+ */
+final class JrtFileAttributeView implements BasicFileAttributeView {
+
+    private static enum AttrID {
+        size,
+        creationTime,
+        lastAccessTime,
+        lastModifiedTime,
+        isDirectory,
+        isRegularFile,
+        isSymbolicLink,
+        isOther,
+        fileKey,
+        compressedSize,
+        extension
+    };
+
+    private final JrtPath path;
+    private final boolean isJrtView;
+    private final LinkOption[] options;
+
+    private JrtFileAttributeView(JrtPath path, boolean isJrtView, LinkOption... options) {
+        this.path = path;
+        this.isJrtView = isJrtView;
+        this.options = options;
+    }
+
+    @SuppressWarnings("unchecked") // Cast to V
+    static <V extends FileAttributeView> V get(JrtPath path, Class<V> type, LinkOption... options) {
+        Objects.requireNonNull(type);
+        if (type == BasicFileAttributeView.class) {
+            return (V) new JrtFileAttributeView(path, false, options);
+        }
+        if (type == JrtFileAttributeView.class) {
+            return (V) new JrtFileAttributeView(path, true, options);
+        }
+        return null;
+    }
+
+    static JrtFileAttributeView get(JrtPath path, String type, LinkOption... options) {
+        Objects.requireNonNull(type);
+        if (type.equals("basic")) {
+            return new JrtFileAttributeView(path, false, options);
+        }
+        if (type.equals("jrt")) {
+            return new JrtFileAttributeView(path, true, options);
+        }
+        return null;
+    }
+
+    @Override
+    public String name() {
+        return isJrtView ? "jrt" : "basic";
+    }
+
+    @Override
+    public JrtFileAttributes readAttributes() throws IOException {
+        return path.getAttributes(options);
+    }
+
+    @Override
+    public void setTimes(FileTime lastModifiedTime,
+                         FileTime lastAccessTime,
+                         FileTime createTime) throws IOException {
+        path.setTimes(lastModifiedTime, lastAccessTime, createTime);
+    }
+
+    static void setAttribute(JrtPath path, String attribute, Object value)
+            throws IOException {
+        int colonPos = attribute.indexOf(':');
+        if (colonPos != -1) {    // type = "basic", if no ":"
+            String type = attribute.substring(0, colonPos++);
+            if (!type.equals("basic") && !type.equals("jrt")) {
+                throw new UnsupportedOperationException(
+                    "view <" + type + "> is not supported");
+            }
+            attribute = attribute.substring(colonPos);
+        }
+        try {
+            AttrID id = AttrID.valueOf(attribute);
+            if (id == AttrID.lastModifiedTime) {
+                path.setTimes((FileTime) value, null, null);
+            } else if (id == AttrID.lastAccessTime) {
+                path.setTimes(null, (FileTime) value, null);
+            } else if (id == AttrID.creationTime) {
+                path.setTimes(null, null, (FileTime) value);
+            }
+            return;
+        } catch (IllegalArgumentException x) {}
+        throw new UnsupportedOperationException("'" + attribute
+                + "' is unknown or read-only attribute");
+    }
+
+    static Map<String, Object> readAttributes(JrtPath path, String attributes,
+                                              LinkOption... options)
+            throws IOException {
+        int colonPos = attributes.indexOf(':');
+        boolean isJrtView = false;
+        if (colonPos != -1) {    // type = "basic", if no ":"
+            String type = attributes.substring(0, colonPos++);
+            if (!type.equals("basic") && !type.equals("jrt")) {
+                throw new UnsupportedOperationException("view <" + type +
+                                                        "> is not supported");
+            }
+            isJrtView = true;
+            attributes = attributes.substring(colonPos);
+        }
+        JrtFileAttributes jrtfas = path.getAttributes();
+        LinkedHashMap<String, Object> map = new LinkedHashMap<>();
+        if ("*".equals(attributes)) {
+            for (AttrID id : AttrID.values()) {
+                map.put(id.name(), attribute(id, jrtfas, isJrtView));
+            }
+        } else {
+            String[] as = attributes.split(",");
+            for (String a : as) {
+                //throw IllegalArgumentException
+                map.put(a, attribute(AttrID.valueOf(a), jrtfas, isJrtView));
+            }
+        }
+        return map;
+    }
+
+    static Object attribute(AttrID id, JrtFileAttributes jrtfas, boolean isJrtView) {
+        switch (id) {
+            case size:
+                return jrtfas.size();
+            case creationTime:
+                return jrtfas.creationTime();
+            case lastAccessTime:
+                return jrtfas.lastAccessTime();
+            case lastModifiedTime:
+                return jrtfas.lastModifiedTime();
+            case isDirectory:
+                return jrtfas.isDirectory();
+            case isRegularFile:
+                return jrtfas.isRegularFile();
+            case isSymbolicLink:
+                return jrtfas.isSymbolicLink();
+            case isOther:
+                return jrtfas.isOther();
+            case fileKey:
+                return jrtfas.fileKey();
+            case compressedSize:
+                if (isJrtView) {
+                    return jrtfas.compressedSize();
+                }
+                break;
+            case extension:
+                if (isJrtView) {
+                    return jrtfas.extension();
+                }
+                break;
+        }
+        return null;
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/jrtfs/JrtFileAttributes.class b/tests/test_data/std/jdk/internal/jrtfs/JrtFileAttributes.class
new file mode 100644
index 0000000000000000000000000000000000000000..565ba3f0de89033aab7021bf2c5365281f8e9a25
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/jrtfs/JrtFileAttributes.java b/tests/test_data/std/jdk/internal/jrtfs/JrtFileAttributes.java
new file mode 100644
index 00000000..f0804b58
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/jrtfs/JrtFileAttributes.java
@@ -0,0 +1,141 @@
+/*
+ * Copyright (c) 2016, 2024, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package jdk.internal.jrtfs;
+
+import java.nio.file.attribute.BasicFileAttributes;
+import java.nio.file.attribute.FileTime;
+import java.util.Formatter;
+import jdk.internal.jimage.ImageReader.Node;
+
+/**
+ * File attributes implementation for jrt image file system.
+ *
+ * @implNote This class needs to maintain JDK 8 source compatibility.
+ *
+ * It is used internally in the JDK to implement jimage/jrtfs access,
+ * but also compiled and delivered as part of the jrtfs.jar to support access
+ * to the jimage file provided by the shipped JDK by tools running on JDK 8.
+ */
+final class JrtFileAttributes  implements BasicFileAttributes {
+
+    private final Node node;
+
+    JrtFileAttributes(Node node) {
+        this.node = node;
+    }
+
+    //-------- basic attributes --------
+    @Override
+    public FileTime creationTime() {
+        return node.creationTime();
+    }
+
+    @Override
+    public boolean isDirectory() {
+        return node.isDirectory();
+    }
+
+    @Override
+    public boolean isOther() {
+        return false;
+    }
+
+    @Override
+    public boolean isRegularFile() {
+        return !isDirectory();
+    }
+
+    @Override
+    public FileTime lastAccessTime() {
+        return node.lastAccessTime();
+    }
+
+    @Override
+    public FileTime lastModifiedTime() {
+        return node.lastModifiedTime();
+    }
+
+    @Override
+    public long size() {
+        return node.size();
+    }
+
+    @Override
+    public boolean isSymbolicLink() {
+        return node.isLink();
+    }
+
+    @Override
+    public Object fileKey() {
+        return node.resolveLink(true);
+    }
+
+    //-------- jrtfs specific attributes --------
+    /**
+     * Compressed resource file. If not available or not applicable, 0L is
+     * returned.
+     *
+     * @return the compressed resource size for compressed resources.
+     */
+    public long compressedSize() {
+        return node.compressedSize();
+    }
+
+    /**
+     * "file" extension of a file resource.
+     *
+     * @return extension string for the file resource
+     */
+    public String extension() {
+        return node.extension();
+    }
+
+    @Override
+    public final String toString() {
+        StringBuilder sb = new StringBuilder(1024);
+        try (Formatter fm = new Formatter(sb)) {
+            if (creationTime() != null) {
+                fm.format("    creationTime    : %tc%n", creationTime().toMillis());
+            } else {
+                fm.format("    creationTime    : null%n");
+            }
+            if (lastAccessTime() != null) {
+                fm.format("    lastAccessTime  : %tc%n", lastAccessTime().toMillis());
+            } else {
+                fm.format("    lastAccessTime  : null%n");
+            }
+            fm.format("    lastModifiedTime: %tc%n", lastModifiedTime().toMillis());
+            fm.format("    isRegularFile   : %b%n", isRegularFile());
+            fm.format("    isDirectory     : %b%n", isDirectory());
+            fm.format("    isSymbolicLink  : %b%n", isSymbolicLink());
+            fm.format("    isOther         : %b%n", isOther());
+            fm.format("    fileKey         : %s%n", fileKey());
+            fm.format("    size            : %d%n", size());
+            fm.format("    compressedSize  : %d%n", compressedSize());
+            fm.format("    extension       : %s%n", extension());
+        }
+        return sb.toString();
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/jrtfs/JrtFileStore.class b/tests/test_data/std/jdk/internal/jrtfs/JrtFileStore.class
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/jrtfs/JrtFileStore.java b/tests/test_data/std/jdk/internal/jrtfs/JrtFileStore.java
new file mode 100644
index 00000000..7d4b0a18
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/jrtfs/JrtFileStore.java
@@ -0,0 +1,104 @@
+/*
+ * Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package jdk.internal.jrtfs;
+
+import java.io.IOException;
+import java.nio.file.FileStore;
+import java.nio.file.FileSystem;
+import java.nio.file.attribute.FileAttributeView;
+import java.nio.file.attribute.BasicFileAttributeView;
+import java.nio.file.attribute.FileStoreAttributeView;
+import java.util.Objects;
+
+/**
+ * File store implementation for jrt file systems.
+ *
+ * @implNote This class needs to maintain JDK 8 source compatibility.
+ *
+ * It is used internally in the JDK to implement jimage/jrtfs access,
+ * but also compiled and delivered as part of the jrtfs.jar to support access
+ * to the jimage file provided by the shipped JDK by tools running on JDK 8.
+ */
+final class JrtFileStore extends FileStore {
+
+    protected final FileSystem jrtfs;
+
+    JrtFileStore(JrtPath jrtPath) {
+        this.jrtfs = jrtPath.getFileSystem();
+    }
+
+    @Override
+    public String name() {
+        return jrtfs.toString() + "/";
+    }
+
+    @Override
+    public String type() {
+        return "jrtfs";
+    }
+
+    @Override
+    public boolean isReadOnly() {
+        return jrtfs.isReadOnly();
+    }
+
+    @Override
+    public boolean supportsFileAttributeView(String name) {
+        return name.equals("basic") || name.equals("jrt");
+    }
+
+    @Override
+    @SuppressWarnings("unchecked")
+    public <V extends FileStoreAttributeView> V getFileStoreAttributeView(Class<V> type) {
+        Objects.requireNonNull(type, "type");
+        return (V) null;
+    }
+
+    @Override
+    public long getTotalSpace() throws IOException {
+        throw new UnsupportedOperationException("getTotalSpace");
+    }
+
+    @Override
+    public long getUsableSpace() throws IOException {
+        throw new UnsupportedOperationException("getUsableSpace");
+    }
+
+    @Override
+    public long getUnallocatedSpace() throws IOException {
+        throw new UnsupportedOperationException("getUnallocatedSpace");
+    }
+
+    @Override
+    public Object getAttribute(String attribute) throws IOException {
+        throw new UnsupportedOperationException("does not support " + attribute);
+    }
+
+    @Override
+    public boolean supportsFileAttributeView(Class<? extends FileAttributeView> type) {
+        return type == BasicFileAttributeView.class ||
+               type == JrtFileAttributeView.class;
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/jrtfs/JrtFileSystem$1.class b/tests/test_data/std/jdk/internal/jrtfs/JrtFileSystem$1.class
new file mode 100644
index 0000000000000000000000000000000000000000..5b582c9b28adac20126c397c40102fdce71261d3
GIT binary patch
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literal 0
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diff --git a/tests/test_data/std/jdk/internal/jrtfs/JrtFileSystem.class b/tests/test_data/std/jdk/internal/jrtfs/JrtFileSystem.class
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diff --git a/tests/test_data/std/jdk/internal/jrtfs/JrtFileSystem.java b/tests/test_data/std/jdk/internal/jrtfs/JrtFileSystem.java
new file mode 100644
index 00000000..9a8d9d22
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/jrtfs/JrtFileSystem.java
@@ -0,0 +1,491 @@
+/*
+ * Copyright (c) 2014, 2022, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package jdk.internal.jrtfs;
+
+import java.io.ByteArrayInputStream;
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.OutputStream;
+import java.nio.ByteBuffer;
+import java.nio.channels.Channels;
+import java.nio.channels.FileChannel;
+import java.nio.channels.NonWritableChannelException;
+import java.nio.channels.ReadableByteChannel;
+import java.nio.channels.SeekableByteChannel;
+import java.nio.file.ClosedFileSystemException;
+import java.nio.file.CopyOption;
+import java.nio.file.DirectoryStream;
+import java.nio.file.FileStore;
+import java.nio.file.FileSystem;
+import java.nio.file.FileSystemException;
+import java.nio.file.InvalidPathException;
+import java.nio.file.LinkOption;
+import java.nio.file.NoSuchFileException;
+import java.nio.file.NotDirectoryException;
+import java.nio.file.OpenOption;
+import java.nio.file.Path;
+import java.nio.file.PathMatcher;
+import java.nio.file.ReadOnlyFileSystemException;
+import java.nio.file.StandardOpenOption;
+import java.nio.file.WatchService;
+import java.nio.file.attribute.FileAttribute;
+import java.nio.file.attribute.FileTime;
+import java.nio.file.attribute.UserPrincipalLookupService;
+import java.nio.file.spi.FileSystemProvider;
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.Collections;
+import java.util.HashSet;
+import java.util.Iterator;
+import java.util.Map;
+import java.util.Objects;
+import java.util.Set;
+import java.util.regex.Pattern;
+import jdk.internal.jimage.ImageReader.Node;
+import static java.util.stream.Collectors.toList;
+
+/**
+ * jrt file system implementation built on System jimage files.
+ *
+ * @implNote This class needs to maintain JDK 8 source compatibility.
+ *
+ * It is used internally in the JDK to implement jimage/jrtfs access,
+ * but also compiled and delivered as part of the jrtfs.jar to support access
+ * to the jimage file provided by the shipped JDK by tools running on JDK 8.
+ */
+class JrtFileSystem extends FileSystem {
+
+    private final JrtFileSystemProvider provider;
+    private final JrtPath rootPath = new JrtPath(this, "/");
+    private volatile boolean isOpen;
+    private volatile boolean isClosable;
+    private SystemImage image;
+
+    JrtFileSystem(JrtFileSystemProvider provider, Map<String, ?> env)
+            throws IOException
+    {
+        this.provider = provider;
+        this.image = SystemImage.open();  // open image file
+        this.isOpen = true;
+        this.isClosable = env != null;
+    }
+
+    // FileSystem method implementations
+    @Override
+    public boolean isOpen() {
+        return isOpen;
+    }
+
+    @Override
+    public void close() throws IOException {
+        if (!isClosable)
+            throw new UnsupportedOperationException();
+        cleanup();
+    }
+
+    @Override
+    public FileSystemProvider provider() {
+        return provider;
+    }
+
+    @Override
+    public Iterable<Path> getRootDirectories() {
+        return Collections.singleton(getRootPath());
+    }
+
+    @Override
+    public JrtPath getPath(String first, String... more) {
+        if (more.length == 0) {
+            return new JrtPath(this, first);
+        }
+        StringBuilder sb = new StringBuilder();
+        sb.append(first);
+        for (String path : more) {
+            if (!path.isEmpty()) {
+                if (sb.length() > 0) {
+                    sb.append('/');
+                }
+                sb.append(path);
+            }
+        }
+        return new JrtPath(this, sb.toString());
+    }
+
+    @Override
+    public final boolean isReadOnly() {
+        return true;
+    }
+
+    @Override
+    public final UserPrincipalLookupService getUserPrincipalLookupService() {
+        throw new UnsupportedOperationException();
+    }
+
+    @Override
+    public final WatchService newWatchService() {
+        throw new UnsupportedOperationException();
+    }
+
+    @Override
+    public final Iterable<FileStore> getFileStores() {
+        return Collections.singleton(getFileStore(getRootPath()));
+    }
+
+    private static final Set<String> supportedFileAttributeViews
+            = Collections.unmodifiableSet(
+                    new HashSet<String>(Arrays.asList("basic", "jrt")));
+
+    @Override
+    public final Set<String> supportedFileAttributeViews() {
+        return supportedFileAttributeViews;
+    }
+
+    @Override
+    public final String toString() {
+        return "jrt:/";
+    }
+
+    @Override
+    public final String getSeparator() {
+        return "/";
+    }
+
+    @Override
+    public PathMatcher getPathMatcher(String syntaxAndInput) {
+        int pos = syntaxAndInput.indexOf(':');
+        if (pos <= 0) {
+            throw new IllegalArgumentException();
+        }
+        String syntax = syntaxAndInput.substring(0, pos);
+        String input = syntaxAndInput.substring(pos + 1);
+        String expr;
+        if (syntax.equalsIgnoreCase("glob")) {
+            expr = JrtUtils.toRegexPattern(input);
+        } else if (syntax.equalsIgnoreCase("regex")) {
+            expr = input;
+        } else {
+                throw new UnsupportedOperationException("Syntax '" + syntax
+                        + "' not recognized");
+        }
+        // return matcher
+        final Pattern pattern = Pattern.compile(expr);
+        return (Path path) -> pattern.matcher(path.toString()).matches();
+    }
+
+    JrtPath resolveLink(JrtPath path) throws IOException {
+        Node node = checkNode(path);
+        if (node.isLink()) {
+            node = node.resolveLink();
+            return new JrtPath(this, node.getName());  // TBD, normalized?
+        }
+        return path;
+    }
+
+    JrtFileAttributes getFileAttributes(JrtPath path, LinkOption... options)
+            throws IOException {
+        Node node = checkNode(path);
+        if (node.isLink() && followLinks(options)) {
+            return new JrtFileAttributes(node.resolveLink(true));
+        }
+        return new JrtFileAttributes(node);
+    }
+
+    /**
+     * returns the list of child paths of the given directory "path"
+     *
+     * @param path name of the directory whose content is listed
+     * @return iterator for child paths of the given directory path
+     */
+    Iterator<Path> iteratorOf(JrtPath path, DirectoryStream.Filter<? super Path> filter)
+            throws IOException {
+        Node node = checkNode(path).resolveLink(true);
+        if (!node.isDirectory()) {
+            throw new NotDirectoryException(path.getName());
+        }
+        if (filter == null) {
+            return node.getChildren()
+                       .stream()
+                       .map(child -> (Path)(path.resolve(new JrtPath(this, child.getNameString()).getFileName())))
+                       .iterator();
+        }
+        return node.getChildren()
+                   .stream()
+                   .map(child -> (Path)(path.resolve(new JrtPath(this, child.getNameString()).getFileName())))
+                   .filter(p ->  { try { return filter.accept(p);
+                                   } catch (IOException x) {}
+                                   return false;
+                                  })
+                   .iterator();
+    }
+
+    // returns the content of the file resource specified by the path
+    byte[] getFileContent(JrtPath path) throws IOException {
+        Node node = checkNode(path);
+        if (node.isDirectory()) {
+            throw new FileSystemException(path + " is a directory");
+        }
+        //assert node.isResource() : "resource node expected here";
+        return image.getResource(node);
+    }
+
+    /////////////// Implementation details below this point //////////
+
+    // static utility methods
+    static ReadOnlyFileSystemException readOnly() {
+        return new ReadOnlyFileSystemException();
+    }
+
+    // do the supplied options imply that we have to chase symlinks?
+    static boolean followLinks(LinkOption... options) {
+        if (options != null) {
+            for (LinkOption lo : options) {
+                Objects.requireNonNull(lo);
+                if (lo == LinkOption.NOFOLLOW_LINKS) {
+                    return false;
+                } else {
+                    throw new AssertionError("should not reach here");
+                }
+            }
+        }
+        return true;
+    }
+
+    // check that the options passed are supported by (read-only) jrt file system
+    static void checkOptions(Set<? extends OpenOption> options) {
+        // check for options of null type and option is an instance of StandardOpenOption
+        for (OpenOption option : options) {
+            Objects.requireNonNull(option);
+            if (!(option instanceof StandardOpenOption)) {
+                throw new IllegalArgumentException(
+                    "option class: " + option.getClass());
+            }
+        }
+        if (options.contains(StandardOpenOption.WRITE) ||
+            options.contains(StandardOpenOption.APPEND)) {
+            throw readOnly();
+        }
+    }
+
+    // clean up this file system - called from finalize and close
+    synchronized void cleanup() throws IOException {
+        if (isOpen) {
+            isOpen = false;
+            image.close();
+            image = null;
+        }
+    }
+
+    // These methods throw read only file system exception
+    final void setTimes(JrtPath jrtPath, FileTime mtime, FileTime atime, FileTime ctime)
+            throws IOException {
+        throw readOnly();
+    }
+
+    // These methods throw read only file system exception
+    final void createDirectory(JrtPath jrtPath, FileAttribute<?>... attrs) throws IOException {
+        throw readOnly();
+    }
+
+    final void deleteFile(JrtPath jrtPath, boolean failIfNotExists)
+            throws IOException {
+        throw readOnly();
+    }
+
+    final OutputStream newOutputStream(JrtPath jrtPath, OpenOption... options)
+            throws IOException {
+        throw readOnly();
+    }
+
+    final void copyFile(boolean deletesrc, JrtPath srcPath, JrtPath dstPath, CopyOption... options)
+            throws IOException {
+        throw readOnly();
+    }
+
+    final FileChannel newFileChannel(JrtPath path,
+            Set<? extends OpenOption> options,
+            FileAttribute<?>... attrs)
+            throws IOException {
+        throw new UnsupportedOperationException("newFileChannel");
+    }
+
+    final InputStream newInputStream(JrtPath path) throws IOException {
+        return new ByteArrayInputStream(getFileContent(path));
+    }
+
+    final SeekableByteChannel newByteChannel(JrtPath path,
+            Set<? extends OpenOption> options,
+            FileAttribute<?>... attrs)
+            throws IOException {
+        checkOptions(options);
+
+        byte[] buf = getFileContent(path);
+        final ReadableByteChannel rbc
+                = Channels.newChannel(new ByteArrayInputStream(buf));
+        final long size = buf.length;
+        return new SeekableByteChannel() {
+            long read = 0;
+
+            @Override
+            public boolean isOpen() {
+                return rbc.isOpen();
+            }
+
+            @Override
+            public long position() throws IOException {
+                return read;
+            }
+
+            @Override
+            public SeekableByteChannel position(long pos)
+                    throws IOException {
+                throw new UnsupportedOperationException();
+            }
+
+            @Override
+            public int read(ByteBuffer dst) throws IOException {
+                int n = rbc.read(dst);
+                if (n > 0) {
+                    read += n;
+                }
+                return n;
+            }
+
+            @Override
+            public SeekableByteChannel truncate(long size)
+                    throws IOException {
+                throw new NonWritableChannelException();
+            }
+
+            @Override
+            public int write(ByteBuffer src) throws IOException {
+                throw new NonWritableChannelException();
+            }
+
+            @Override
+            public long size() throws IOException {
+                return size;
+            }
+
+            @Override
+            public void close() throws IOException {
+                rbc.close();
+            }
+        };
+    }
+
+    final JrtFileStore getFileStore(JrtPath path) {
+        return new JrtFileStore(path);
+    }
+
+    final void ensureOpen() throws IOException {
+        if (!isOpen()) {
+            throw new ClosedFileSystemException();
+        }
+    }
+
+    final JrtPath getRootPath() {
+        return rootPath;
+    }
+
+    boolean isSameFile(JrtPath path1, JrtPath path2) throws IOException {
+        return checkNode(path1) == checkNode(path2);
+    }
+
+    boolean isLink(JrtPath path) throws IOException {
+        return checkNode(path).isLink();
+    }
+
+    boolean exists(JrtPath path) throws IOException {
+        try {
+            checkNode(path);
+        } catch (NoSuchFileException exp) {
+            return false;
+        }
+        return true;
+    }
+
+    boolean isDirectory(JrtPath path, boolean resolveLinks)
+            throws IOException {
+        Node node = checkNode(path);
+        return resolveLinks && node.isLink()
+                ? node.resolveLink(true).isDirectory()
+                : node.isDirectory();
+    }
+
+    JrtPath toRealPath(JrtPath path, LinkOption... options)
+            throws IOException {
+        Node node = checkNode(path);
+        if (followLinks(options) && node.isLink()) {
+            node = node.resolveLink();
+        }
+        // image node holds the real/absolute path name
+        return new JrtPath(this, node.getName(), true);
+    }
+
+    private Node lookup(String path) {
+        try {
+            return image.findNode(path);
+        } catch (RuntimeException | IOException ex) {
+            throw new InvalidPathException(path, ex.toString());
+        }
+    }
+
+    private Node lookupSymbolic(String path) {
+        int i = 1;
+        while (i < path.length()) {
+            i = path.indexOf('/', i);
+            if (i == -1) {
+                break;
+            }
+            String prefix = path.substring(0, i);
+            Node node = lookup(prefix);
+            if (node == null) {
+                break;
+            }
+            if (node.isLink()) {
+                Node link = node.resolveLink(true);
+                // resolved symbolic path concatenated to the rest of the path
+                String resPath = link.getName() + path.substring(i);
+                node = lookup(resPath);
+                return node != null ? node : lookupSymbolic(resPath);
+            }
+            i++;
+        }
+        return null;
+    }
+
+    Node checkNode(JrtPath path) throws IOException {
+        ensureOpen();
+        String p = path.getResolvedPath();
+        Node node = lookup(p);
+        if (node == null) {
+            node = lookupSymbolic(p);
+            if (node == null) {
+                throw new NoSuchFileException(p);
+            }
+        }
+        return node;
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/jrtfs/JrtFileSystemProvider$1.class b/tests/test_data/std/jdk/internal/jrtfs/JrtFileSystemProvider$1.class
new file mode 100644
index 0000000000000000000000000000000000000000..3306b4cad0218a07cf5710fe43593814943a4e5b
GIT binary patch
literal 1033
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/jrtfs/JrtFileSystemProvider$JrtFsLoader.class b/tests/test_data/std/jdk/internal/jrtfs/JrtFileSystemProvider$JrtFsLoader.class
new file mode 100644
index 0000000000000000000000000000000000000000..8c21f3f50f38e8dff47d8d3247d5ad3a94a7a0ae
GIT binary patch
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/jrtfs/JrtFileSystemProvider.class b/tests/test_data/std/jdk/internal/jrtfs/JrtFileSystemProvider.class
new file mode 100644
index 0000000000000000000000000000000000000000..106a8ed38f3a5579db185a9e0cb6e3558cba20a9
GIT binary patch
literal 13539
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/jrtfs/JrtFileSystemProvider.java b/tests/test_data/std/jdk/internal/jrtfs/JrtFileSystemProvider.java
new file mode 100644
index 00000000..4d3e0ed9
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/jrtfs/JrtFileSystemProvider.java
@@ -0,0 +1,358 @@
+/*
+ * Copyright (c) 2016, 2021, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package jdk.internal.jrtfs;
+
+import java.io.*;
+import java.net.MalformedURLException;
+import java.net.URL;
+import java.net.URLClassLoader;
+import java.nio.channels.*;
+import java.nio.file.*;
+import java.nio.file.DirectoryStream.Filter;
+import java.nio.file.attribute.*;
+import java.nio.file.spi.FileSystemProvider;
+import java.net.URI;
+import java.security.AccessController;
+import java.security.PrivilegedAction;
+import java.util.HashMap;
+import java.util.Map;
+import java.util.Objects;
+import java.util.Set;
+import java.util.concurrent.ExecutorService;
+
+/**
+ * File system provider for jrt file systems. Conditionally creates jrt fs on
+ * .jimage file or exploded modules directory of underlying JDK.
+ *
+ * @implNote This class needs to maintain JDK 8 source compatibility.
+ *
+ * It is used internally in the JDK to implement jimage/jrtfs access,
+ * but also compiled and delivered as part of the jrtfs.jar to support access
+ * to the jimage file provided by the shipped JDK by tools running on JDK 8.
+ */
+public final class JrtFileSystemProvider extends FileSystemProvider {
+
+    private volatile FileSystem theFileSystem;
+
+    public JrtFileSystemProvider() {
+    }
+
+    @Override
+    public String getScheme() {
+        return "jrt";
+    }
+
+    /**
+     * Need RuntimePermission "accessSystemModules" to create or get jrt:/
+     */
+    private void checkPermission() {
+        @SuppressWarnings("removal")
+        SecurityManager sm = System.getSecurityManager();
+        if (sm != null) {
+            RuntimePermission perm = new RuntimePermission("accessSystemModules");
+            sm.checkPermission(perm);
+        }
+    }
+
+    private void checkUri(URI uri) {
+        if (!uri.getScheme().equalsIgnoreCase(getScheme())) {
+            throw new IllegalArgumentException("URI does not match this provider");
+        }
+        if (uri.getAuthority() != null) {
+            throw new IllegalArgumentException("Authority component present");
+        }
+        if (uri.getPath() == null) {
+            throw new IllegalArgumentException("Path component is undefined");
+        }
+        if (!uri.getPath().equals("/")) {
+            throw new IllegalArgumentException("Path component should be '/'");
+        }
+        if (uri.getQuery() != null) {
+            throw new IllegalArgumentException("Query component present");
+        }
+        if (uri.getFragment() != null) {
+            throw new IllegalArgumentException("Fragment component present");
+        }
+    }
+
+    @Override
+    public FileSystem newFileSystem(URI uri, Map<String, ?> env)
+            throws IOException {
+        Objects.requireNonNull(env);
+        checkPermission();
+        checkUri(uri);
+        if (env.containsKey("java.home")) {
+            return newFileSystem((String)env.get("java.home"), uri, env);
+        } else {
+            return new JrtFileSystem(this, env);
+        }
+    }
+
+    private static final String JRT_FS_JAR = "jrt-fs.jar";
+    private FileSystem newFileSystem(String targetHome, URI uri, Map<String, ?> env)
+            throws IOException {
+        Objects.requireNonNull(targetHome);
+        Path jrtfs = FileSystems.getDefault().getPath(targetHome, "lib", JRT_FS_JAR);
+        if (Files.notExists(jrtfs)) {
+            throw new IOException(jrtfs.toString() + " not exist");
+        }
+        Map<String,?> newEnv = new HashMap<>(env);
+        newEnv.remove("java.home");
+        ClassLoader cl = newJrtFsLoader(jrtfs);
+        try {
+            Class<?> c = Class.forName(JrtFileSystemProvider.class.getName(), false, cl);
+            @SuppressWarnings("deprecation")
+            Object tmp = c.newInstance();
+            return ((FileSystemProvider)tmp).newFileSystem(uri, newEnv);
+        } catch (ClassNotFoundException |
+                 IllegalAccessException |
+                 InstantiationException e) {
+            throw new IOException(e);
+        }
+    }
+
+    private static class JrtFsLoader extends URLClassLoader {
+        JrtFsLoader(URL[] urls) {
+            super(urls);
+        }
+        @Override
+        protected Class<?> loadClass(String cn, boolean resolve)
+                throws ClassNotFoundException
+        {
+            Class<?> c = findLoadedClass(cn);
+            if (c == null) {
+                URL u = findResource(cn.replace('.', '/') + ".class");
+                if (u != null) {
+                    c = findClass(cn);
+                } else {
+                    return super.loadClass(cn, resolve);
+                }
+            }
+            if (resolve)
+                resolveClass(c);
+            return c;
+        }
+    }
+
+    @SuppressWarnings("removal")
+    private static URLClassLoader newJrtFsLoader(Path jrtfs) {
+        final URL url;
+        try {
+            url = jrtfs.toUri().toURL();
+        } catch (MalformedURLException mue) {
+            throw new IllegalArgumentException(mue);
+        }
+
+        final URL[] urls = new URL[] { url };
+        return AccessController.doPrivileged(
+                new PrivilegedAction<URLClassLoader>() {
+                    @Override
+                    public URLClassLoader run() {
+                        return new JrtFsLoader(urls);
+                    }
+                }
+        );
+    }
+
+    @Override
+    public Path getPath(URI uri) {
+        checkPermission();
+        if (!uri.getScheme().equalsIgnoreCase(getScheme())) {
+            throw new IllegalArgumentException("URI does not match this provider");
+        }
+        if (uri.getAuthority() != null) {
+            throw new IllegalArgumentException("Authority component present");
+        }
+        if (uri.getQuery() != null) {
+            throw new IllegalArgumentException("Query component present");
+        }
+        if (uri.getFragment() != null) {
+            throw new IllegalArgumentException("Fragment component present");
+        }
+        String path = uri.getPath();
+        if (path == null || path.charAt(0) != '/' || path.contains("..")) {
+            throw new IllegalArgumentException("Invalid path component");
+        }
+
+        return getTheFileSystem().getPath("/modules" + path);
+    }
+
+    private FileSystem getTheFileSystem() {
+        checkPermission();
+        FileSystem fs = this.theFileSystem;
+        if (fs == null) {
+            synchronized (this) {
+                fs = this.theFileSystem;
+                if (fs == null) {
+                    try {
+                        this.theFileSystem = fs = new JrtFileSystem(this, null);
+                    } catch (IOException ioe) {
+                        throw new InternalError(ioe);
+                    }
+                }
+            }
+        }
+        return fs;
+    }
+
+    @Override
+    public FileSystem getFileSystem(URI uri) {
+        checkPermission();
+        checkUri(uri);
+        return getTheFileSystem();
+    }
+
+    // Checks that the given file is a JrtPath
+    static final JrtPath toJrtPath(Path path) {
+        Objects.requireNonNull(path, "path");
+        if (!(path instanceof JrtPath)) {
+            throw new ProviderMismatchException();
+        }
+        return (JrtPath) path;
+    }
+
+    @Override
+    public void checkAccess(Path path, AccessMode... modes) throws IOException {
+        toJrtPath(path).checkAccess(modes);
+    }
+
+    @Override
+    public Path readSymbolicLink(Path link) throws IOException {
+        return toJrtPath(link).readSymbolicLink();
+    }
+
+    @Override
+    public void copy(Path src, Path target, CopyOption... options)
+            throws IOException {
+        toJrtPath(src).copy(toJrtPath(target), options);
+    }
+
+    @Override
+    public void createDirectory(Path path, FileAttribute<?>... attrs)
+            throws IOException {
+        toJrtPath(path).createDirectory(attrs);
+    }
+
+    @Override
+    public final void delete(Path path) throws IOException {
+        toJrtPath(path).delete();
+    }
+
+    @Override
+    @SuppressWarnings("unchecked")
+    public <V extends FileAttributeView> V
+            getFileAttributeView(Path path, Class<V> type, LinkOption... options) {
+        return JrtFileAttributeView.get(toJrtPath(path), type, options);
+    }
+
+    @Override
+    public FileStore getFileStore(Path path) throws IOException {
+        return toJrtPath(path).getFileStore();
+    }
+
+    @Override
+    public boolean isHidden(Path path) {
+        return toJrtPath(path).isHidden();
+    }
+
+    @Override
+    public boolean isSameFile(Path path, Path other) throws IOException {
+        return toJrtPath(path).isSameFile(other);
+    }
+
+    @Override
+    public void move(Path src, Path target, CopyOption... options)
+            throws IOException {
+        toJrtPath(src).move(toJrtPath(target), options);
+    }
+
+    @Override
+    public AsynchronousFileChannel newAsynchronousFileChannel(Path path,
+            Set<? extends OpenOption> options,
+            ExecutorService exec,
+            FileAttribute<?>... attrs)
+            throws IOException {
+        throw new UnsupportedOperationException();
+    }
+
+    @Override
+    public SeekableByteChannel newByteChannel(Path path,
+            Set<? extends OpenOption> options,
+            FileAttribute<?>... attrs)
+            throws IOException {
+        return toJrtPath(path).newByteChannel(options, attrs);
+    }
+
+    @Override
+    public DirectoryStream<Path> newDirectoryStream(
+            Path path, Filter<? super Path> filter) throws IOException {
+        return toJrtPath(path).newDirectoryStream(filter);
+    }
+
+    @Override
+    public FileChannel newFileChannel(Path path,
+            Set<? extends OpenOption> options,
+            FileAttribute<?>... attrs)
+            throws IOException {
+        return toJrtPath(path).newFileChannel(options, attrs);
+    }
+
+    @Override
+    public InputStream newInputStream(Path path, OpenOption... options)
+            throws IOException {
+        return toJrtPath(path).newInputStream(options);
+    }
+
+    @Override
+    public OutputStream newOutputStream(Path path, OpenOption... options)
+            throws IOException {
+        return toJrtPath(path).newOutputStream(options);
+    }
+
+    @Override
+    @SuppressWarnings("unchecked") // Cast to A
+    public <A extends BasicFileAttributes> A
+            readAttributes(Path path, Class<A> type, LinkOption... options)
+            throws IOException {
+        if (type == BasicFileAttributes.class || type == JrtFileAttributes.class) {
+            return (A) toJrtPath(path).getAttributes(options);
+        }
+        return null;
+    }
+
+    @Override
+    public Map<String, Object>
+            readAttributes(Path path, String attribute, LinkOption... options)
+            throws IOException {
+        return toJrtPath(path).readAttributes(attribute, options);
+    }
+
+    @Override
+    public void setAttribute(Path path, String attribute,
+            Object value, LinkOption... options)
+            throws IOException {
+        toJrtPath(path).setAttribute(attribute, value, options);
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/jrtfs/JrtPath$1.class b/tests/test_data/std/jdk/internal/jrtfs/JrtPath$1.class
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diff --git a/tests/test_data/std/jdk/internal/jrtfs/JrtPath$2.class b/tests/test_data/std/jdk/internal/jrtfs/JrtPath$2.class
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diff --git a/tests/test_data/std/jdk/internal/jrtfs/JrtPath.java b/tests/test_data/std/jdk/internal/jrtfs/JrtPath.java
new file mode 100644
index 00000000..5010b653
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/jrtfs/JrtPath.java
@@ -0,0 +1,949 @@
+/*
+ * Copyright (c) 2015, 2023, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package jdk.internal.jrtfs;
+
+import java.io.File;
+import java.io.IOError;
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.OutputStream;
+import java.net.URI;
+import java.net.URISyntaxException;
+import java.nio.channels.FileChannel;
+import java.nio.channels.SeekableByteChannel;
+import java.nio.file.*;
+import java.nio.file.DirectoryStream.Filter;
+import java.nio.file.attribute.BasicFileAttributes;
+import java.nio.file.attribute.BasicFileAttributeView;
+import java.nio.file.attribute.FileAttribute;
+import java.nio.file.attribute.FileTime;
+import java.util.Iterator;
+import java.util.Map;
+import java.util.NoSuchElementException;
+import java.util.Objects;
+import java.util.Set;
+import static java.nio.file.StandardOpenOption.*;
+import static java.nio.file.StandardCopyOption.*;
+
+/**
+ * Base class for Path implementation of jrt file systems.
+ *
+ * @implNote This class needs to maintain JDK 8 source compatibility.
+ *
+ * It is used internally in the JDK to implement jimage/jrtfs access,
+ * but also compiled and delivered as part of the jrtfs.jar to support access
+ * to the jimage file provided by the shipped JDK by tools running on JDK 8.
+ */
+final class JrtPath implements Path {
+
+    final JrtFileSystem jrtfs;
+    private final String path;
+    private volatile int[] offsets;
+
+    JrtPath(JrtFileSystem jrtfs, String path) {
+        this.jrtfs = jrtfs;
+        this.path = normalize(path);
+        this.resolved = null;
+    }
+
+    JrtPath(JrtFileSystem jrtfs, String path, boolean normalized) {
+        this.jrtfs = jrtfs;
+        this.path = normalized ? path : normalize(path);
+        this.resolved = null;
+    }
+
+    final String getName() {
+        return path;
+    }
+
+    @Override
+    public final JrtPath getRoot() {
+        if (this.isAbsolute()) {
+            return jrtfs.getRootPath();
+        } else {
+            return null;
+        }
+    }
+
+    @Override
+    public final JrtPath getFileName() {
+        if (path.isEmpty())
+            return this;
+        if (path.length() == 1 && path.charAt(0) == '/')
+            return null;
+        int off = path.lastIndexOf('/');
+        if (off == -1)
+            return this;
+        return new JrtPath(jrtfs, path.substring(off + 1), true);
+    }
+
+    @Override
+    public final JrtPath getParent() {
+        initOffsets();
+        int count = offsets.length;
+        if (count == 0) {     // no elements so no parent
+            return null;
+        }
+        int off = offsets[count - 1] - 1;
+        if (off <= 0) {       // parent is root only (may be null)
+            return getRoot();
+        }
+        return new JrtPath(jrtfs, path.substring(0, off));
+    }
+
+    @Override
+    public final int getNameCount() {
+        initOffsets();
+        return offsets.length;
+    }
+
+    @Override
+    public final JrtPath getName(int index) {
+        initOffsets();
+        if (index < 0 || index >= offsets.length) {
+            throw new IllegalArgumentException("index: " +
+                index + ", offsets length: " + offsets.length);
+        }
+        int begin = offsets[index];
+        int end;
+        if (index == (offsets.length - 1)) {
+            end = path.length();
+        } else {
+            end = offsets[index + 1];
+        }
+        return new JrtPath(jrtfs, path.substring(begin, end));
+    }
+
+    @Override
+    public final JrtPath subpath(int beginIndex, int endIndex) {
+        initOffsets();
+        if (beginIndex < 0 || endIndex > offsets.length ||
+            beginIndex >= endIndex) {
+            throw new IllegalArgumentException(
+                "beginIndex: " + beginIndex + ", endIndex: " + endIndex +
+                ", offsets length: " + offsets.length);
+        }
+        // starting/ending offsets
+        int begin = offsets[beginIndex];
+        int end;
+        if (endIndex == offsets.length) {
+            end = path.length();
+        } else {
+            end = offsets[endIndex];
+        }
+        return new JrtPath(jrtfs, path.substring(begin, end));
+    }
+
+    @Override
+    public final JrtPath toRealPath(LinkOption... options) throws IOException {
+        return jrtfs.toRealPath(this, options);
+    }
+
+    @Override
+    public final JrtPath toAbsolutePath() {
+        if (isAbsolute())
+            return this;
+        return new JrtPath(jrtfs, "/" + path, true);
+    }
+
+    @Override
+    public final URI toUri() {
+        String p = toAbsolutePath().path;
+        if (!p.startsWith("/modules") || p.contains("..")) {
+            throw new IOError(new RuntimeException(p + " cannot be represented as URI"));
+        }
+
+        p = p.substring("/modules".length());
+        if (p.isEmpty()) {
+            p = "/";
+        }
+        return toUri(p);
+    }
+
+    private boolean equalsNameAt(JrtPath other, int index) {
+        int mbegin = offsets[index];
+        int mlen;
+        if (index == (offsets.length - 1)) {
+            mlen = path.length() - mbegin;
+        } else {
+            mlen = offsets[index + 1] - mbegin - 1;
+        }
+        int obegin = other.offsets[index];
+        int olen;
+        if (index == (other.offsets.length - 1)) {
+            olen = other.path.length() - obegin;
+        } else {
+            olen = other.offsets[index + 1] - obegin - 1;
+        }
+        if (mlen != olen) {
+            return false;
+        }
+        int n = 0;
+        while (n < mlen) {
+            if (path.charAt(mbegin + n) != other.path.charAt(obegin + n)) {
+                return false;
+            }
+            n++;
+        }
+        return true;
+    }
+
+    @Override
+    public final JrtPath relativize(Path other) {
+        final JrtPath o = checkPath(other);
+        if (o.equals(this)) {
+            return new JrtPath(jrtfs, "", true);
+        }
+        if (path.isEmpty()) {
+            return o;
+        }
+        if (jrtfs != o.jrtfs || isAbsolute() != o.isAbsolute()) {
+            throw new IllegalArgumentException(
+                "Incorrect filesystem or path: " + other);
+        }
+        final String tp = this.path;
+        final String op = o.path;
+        if (op.startsWith(tp)) {    // fast path
+            int off = tp.length();
+            if (op.charAt(off - 1) == '/')
+                return new JrtPath(jrtfs, op.substring(off), true);
+            if (op.charAt(off) == '/')
+                return new JrtPath(jrtfs, op.substring(off + 1), true);
+        }
+        int mc = this.getNameCount();
+        int oc = o.getNameCount();
+        int n = Math.min(mc, oc);
+        int i = 0;
+        while (i < n) {
+            if (!equalsNameAt(o, i)) {
+                break;
+            }
+            i++;
+        }
+        int dotdots = mc - i;
+        int len = dotdots * 3 - 1;
+        if (i < oc) {
+            len += (o.path.length() - o.offsets[i] + 1);
+        }
+        StringBuilder sb  = new StringBuilder(len);
+        while (dotdots > 0) {
+            sb.append("..");
+            if (sb.length() < len) {  // no tailing slash at the end
+                sb.append('/');
+            }
+            dotdots--;
+        }
+        if (i < oc) {
+            sb.append(o.path, o.offsets[i], o.path.length());
+        }
+        return new JrtPath(jrtfs, sb.toString(), true);
+    }
+
+    @Override
+    public JrtFileSystem getFileSystem() {
+        return jrtfs;
+    }
+
+    @Override
+    public final boolean isAbsolute() {
+        return !path.isEmpty() && path.charAt(0) == '/';
+    }
+
+    @Override
+    public final JrtPath resolve(Path other) {
+        final JrtPath o = checkPath(other);
+        if (this.path.isEmpty() || o.isAbsolute()) {
+            return o;
+        }
+        if (o.path.isEmpty()) {
+            return this;
+        }
+        StringBuilder sb = new StringBuilder(path.length() + o.path.length() + 1);
+        sb.append(path);
+        if (path.charAt(path.length() - 1) != '/')
+            sb.append('/');
+        sb.append(o.path);
+        return new JrtPath(jrtfs, sb.toString(), true);
+    }
+
+    @Override
+    public final Path resolveSibling(Path other) {
+        Objects.requireNonNull(other, "other");
+        Path parent = getParent();
+        return (parent == null) ? other : parent.resolve(other);
+    }
+
+    @Override
+    public final boolean startsWith(Path other) {
+        if (!(Objects.requireNonNull(other) instanceof JrtPath))
+            return false;
+        final JrtPath o = (JrtPath)other;
+        final String tp = this.path;
+        final String op = o.path;
+        if (isAbsolute() != o.isAbsolute() || !tp.startsWith(op)) {
+            return false;
+        }
+        int off = op.length();
+        if (off == 0) {
+            return tp.isEmpty();
+        }
+        // check match is on name boundary
+        return tp.length() == off || tp.charAt(off) == '/' ||
+               off == 0 || op.charAt(off - 1) == '/';
+    }
+
+    @Override
+    public final boolean endsWith(Path other) {
+        if (!(Objects.requireNonNull(other) instanceof JrtPath))
+            return false;
+        final JrtPath o = (JrtPath)other;
+        final JrtPath t = this;
+        int olast = o.path.length() - 1;
+        if (olast > 0 && o.path.charAt(olast) == '/') {
+            olast--;
+        }
+        int last = t.path.length() - 1;
+        if (last > 0 && t.path.charAt(last) == '/') {
+            last--;
+        }
+        if (olast == -1) {  // o.path.length == 0
+            return last == -1;
+        }
+        if ((o.isAbsolute() && (!t.isAbsolute() || olast != last))
+            || last < olast) {
+            return false;
+        }
+        for (; olast >= 0; olast--, last--) {
+            if (o.path.charAt(olast) != t.path.charAt(last)) {
+                return false;
+            }
+        }
+        return o.path.charAt(olast + 1) == '/' ||
+               last == -1 || t.path.charAt(last) == '/';
+    }
+
+    @Override
+    public final JrtPath resolve(String other) {
+        return resolve(getFileSystem().getPath(other));
+    }
+
+    @Override
+    public final Path resolveSibling(String other) {
+        return resolveSibling(getFileSystem().getPath(other));
+    }
+
+    @Override
+    public final boolean startsWith(String other) {
+        return startsWith(getFileSystem().getPath(other));
+    }
+
+    @Override
+    public final boolean endsWith(String other) {
+        return endsWith(getFileSystem().getPath(other));
+    }
+
+    @Override
+    public final JrtPath normalize() {
+        String res = getResolved();
+        if (res == path) {  // no change
+            return this;
+        }
+        return new JrtPath(jrtfs, res, true);
+    }
+
+    private JrtPath checkPath(Path path) {
+        Objects.requireNonNull(path);
+        if (!(path instanceof JrtPath))
+            throw new ProviderMismatchException("path class: " +
+                path.getClass());
+        return (JrtPath) path;
+    }
+
+    // create offset list if not already created
+    private void initOffsets() {
+        if (this.offsets == null) {
+            int len = path.length();
+            // count names
+            int count = 0;
+            int off = 0;
+            while (off < len) {
+                char c = path.charAt(off++);
+                if (c != '/') {
+                    count++;
+                    off = path.indexOf('/', off);
+                    if (off == -1)
+                        break;
+                }
+            }
+            // populate offsets
+            int[] offsets = new int[count];
+            count = 0;
+            off = 0;
+            while (off < len) {
+                char c = path.charAt(off);
+                if (c == '/') {
+                    off++;
+                } else {
+                    offsets[count++] = off++;
+                    off = path.indexOf('/', off);
+                    if (off == -1)
+                        break;
+                }
+            }
+            this.offsets = offsets;
+        }
+    }
+
+    private volatile String resolved;
+
+    final String getResolvedPath() {
+        String r = resolved;
+        if (r == null) {
+            if (isAbsolute()) {
+                r = getResolved();
+            } else {
+                r = toAbsolutePath().getResolvedPath();
+            }
+            resolved = r;
+        }
+        return r;
+    }
+
+    // removes redundant slashes, replace "\" to separator "/"
+    // and check for invalid characters
+    private static String normalize(String path) {
+        int len = path.length();
+        if (len == 0) {
+            return path;
+        }
+        char prevC = 0;
+        for (int i = 0; i < len; i++) {
+            char c = path.charAt(i);
+            if (c == '\\' || c == '\u0000') {
+                return normalize(path, i);
+            }
+            if (c == '/' && prevC == '/') {
+                return normalize(path, i - 1);
+            }
+            prevC = c;
+        }
+        if (prevC == '/' && len > 1) {
+            return path.substring(0, len - 1);
+        }
+        return path;
+    }
+
+    private static String normalize(String path, int off) {
+        int len = path.length();
+        StringBuilder to = new StringBuilder(len);
+        to.append(path, 0, off);
+        char prevC = 0;
+        while (off < len) {
+            char c = path.charAt(off++);
+            if (c == '\\') {
+                c = '/';
+            }
+            if (c == '/' && prevC == '/') {
+                continue;
+            }
+            if (c == '\u0000') {
+                throw new InvalidPathException(path,
+                        "Path: NUL character not allowed");
+            }
+            to.append(c);
+            prevC = c;
+        }
+        len = to.length();
+        if (len > 1 && to.charAt(len - 1) == '/') {
+            to.deleteCharAt(len - 1);
+        }
+        return to.toString();
+    }
+
+    // Remove DotSlash(./) and resolve DotDot (..) components
+    private String getResolved() {
+        int length = path.length();
+        if (length == 0 || (!path.contains("./") && path.charAt(length - 1) != '.')) {
+            return path;
+        } else {
+            return resolvePath();
+        }
+    }
+
+    private String resolvePath() {
+        int length = path.length();
+        char[] to = new char[length];
+        int nc = getNameCount();
+        int[] lastM = new int[nc];
+        int lastMOff = -1;
+        int m = 0;
+        for (int i = 0; i < nc; i++) {
+            int n = offsets[i];
+            int len = (i == offsets.length - 1) ? length - n
+                                                : offsets[i + 1] - n - 1;
+            if (len == 1 && path.charAt(n) == '.') {
+                if (m == 0 && path.charAt(0) == '/')   // absolute path
+                    to[m++] = '/';
+                continue;
+            }
+            if (len == 2 && path.charAt(n) == '.' && path.charAt(n + 1) == '.') {
+                if (lastMOff >= 0) {
+                    m = lastM[lastMOff--];    // retreat
+                    continue;
+                }
+                if (path.charAt(0) == '/') {  // "/../xyz" skip
+                    if (m == 0)
+                        to[m++] = '/';
+                } else {                      // "../xyz" -> "../xyz"
+                    if (m != 0 && to[m-1] != '/')
+                        to[m++] = '/';
+                    while (len-- > 0)
+                        to[m++] = path.charAt(n++);
+                }
+                continue;
+            }
+            if (m == 0 && path.charAt(0) == '/' ||   // absolute path
+                m != 0 && to[m-1] != '/') {   // not the first name
+                to[m++] = '/';
+            }
+            lastM[++lastMOff] = m;
+            while (len-- > 0)
+                to[m++] = path.charAt(n++);
+        }
+        if (m > 1 && to[m - 1] == '/')
+            m--;
+        return (m == to.length) ? new String(to) : new String(to, 0, m);
+    }
+
+    @Override
+    public final String toString() {
+        return path;
+    }
+
+    @Override
+    public final int hashCode() {
+        return path.hashCode();
+    }
+
+    @Override
+    public final boolean equals(Object obj) {
+        return obj instanceof JrtPath &&
+               this.path.equals(((JrtPath) obj).path);
+    }
+
+    @Override
+    public final int compareTo(Path other) {
+        final JrtPath o = checkPath(other);
+        return path.compareTo(o.path);
+    }
+
+    @Override
+    public final WatchKey register(
+            WatchService watcher,
+            WatchEvent.Kind<?>[] events,
+            WatchEvent.Modifier... modifiers) {
+        Objects.requireNonNull(watcher, "watcher");
+        Objects.requireNonNull(events, "events");
+        Objects.requireNonNull(modifiers, "modifiers");
+        throw new UnsupportedOperationException();
+    }
+
+    @Override
+    public final WatchKey register(WatchService watcher, WatchEvent.Kind<?>... events) {
+        return register(watcher, events, new WatchEvent.Modifier[0]);
+    }
+
+    @Override
+    public final File toFile() {
+        throw new UnsupportedOperationException();
+    }
+
+    @Override
+    public final Iterator<Path> iterator() {
+        return new Iterator<Path>() {
+            private int i = 0;
+
+            @Override
+            public boolean hasNext() {
+                return (i < getNameCount());
+            }
+
+            @Override
+            public Path next() {
+                if (i < getNameCount()) {
+                    Path result = getName(i);
+                    i++;
+                    return result;
+                } else {
+                    throw new NoSuchElementException();
+                }
+            }
+
+            @Override
+            public void remove() {
+                throw new ReadOnlyFileSystemException();
+            }
+        };
+    }
+
+    // Helpers for JrtFileSystemProvider and JrtFileSystem
+
+    final JrtPath readSymbolicLink() throws IOException {
+        if (!jrtfs.isLink(this)) {
+            throw new IOException("not a symbolic link");
+        }
+        return jrtfs.resolveLink(this);
+    }
+
+    final boolean isHidden() {
+        return false;
+    }
+
+    final void createDirectory(FileAttribute<?>... attrs)
+            throws IOException {
+        jrtfs.createDirectory(this, attrs);
+    }
+
+    final InputStream newInputStream(OpenOption... options) throws IOException {
+        for (OpenOption opt : options) {
+            if (opt != READ) {
+                throw new UnsupportedOperationException("'" + opt + "' not allowed");
+            }
+        }
+        return jrtfs.newInputStream(this);
+    }
+
+    final DirectoryStream<Path> newDirectoryStream(Filter<? super Path> filter)
+            throws IOException {
+        return new JrtDirectoryStream(this, filter);
+    }
+
+    final void delete() throws IOException {
+        jrtfs.deleteFile(this, true);
+    }
+
+    final void deleteIfExists() throws IOException {
+        jrtfs.deleteFile(this, false);
+    }
+
+    final JrtFileAttributes getAttributes(LinkOption... options) throws IOException {
+        return jrtfs.getFileAttributes(this, options);
+    }
+
+    final void setAttribute(String attribute, Object value, LinkOption... options)
+            throws IOException {
+        JrtFileAttributeView.setAttribute(this, attribute, value);
+    }
+
+    final Map<String, Object> readAttributes(String attributes, LinkOption... options)
+            throws IOException {
+        return JrtFileAttributeView.readAttributes(this, attributes, options);
+    }
+
+    final void setTimes(FileTime mtime, FileTime atime, FileTime ctime)
+            throws IOException {
+        jrtfs.setTimes(this, mtime, atime, ctime);
+    }
+
+    final FileStore getFileStore() throws IOException {
+        // each JrtFileSystem only has one root (as requested for now)
+        if (exists()) {
+            return jrtfs.getFileStore(this);
+        }
+        throw new NoSuchFileException(path);
+    }
+
+    final boolean isSameFile(Path other) throws IOException {
+        if (this == other || this.equals(other)) {
+            return true;
+        }
+        if (other == null || this.getFileSystem() != other.getFileSystem()) {
+            return false;
+        }
+        this.checkAccess();
+        JrtPath o = (JrtPath) other;
+        o.checkAccess();
+        return this.getResolvedPath().equals(o.getResolvedPath()) ||
+               jrtfs.isSameFile(this, o);
+    }
+
+    final SeekableByteChannel newByteChannel(Set<? extends OpenOption> options,
+                                             FileAttribute<?>... attrs)
+            throws IOException
+    {
+        return jrtfs.newByteChannel(this, options, attrs);
+    }
+
+    final FileChannel newFileChannel(Set<? extends OpenOption> options,
+            FileAttribute<?>... attrs)
+            throws IOException {
+        return jrtfs.newFileChannel(this, options, attrs);
+    }
+
+    final void checkAccess(AccessMode... modes) throws IOException {
+        if (modes.length == 0) {    // check if the path exists
+            jrtfs.checkNode(this);  // no need to follow link. the "link" node
+                                    // is built from real node under "/module"
+        } else {
+            boolean w = false;
+            for (AccessMode mode : modes) {
+                switch (mode) {
+                    case READ:
+                        break;
+                    case WRITE:
+                        w = true;
+                        break;
+                    case EXECUTE:
+                        throw new AccessDeniedException(toString());
+                    default:
+                        throw new UnsupportedOperationException();
+                }
+            }
+            jrtfs.checkNode(this);
+            if (w && jrtfs.isReadOnly()) {
+                throw new AccessDeniedException(toString());
+            }
+        }
+    }
+
+    final boolean exists() {
+        try {
+            return jrtfs.exists(this);
+        } catch (IOException x) {}
+        return false;
+    }
+
+    final OutputStream newOutputStream(OpenOption... options) throws IOException {
+        if (options.length == 0) {
+            return jrtfs.newOutputStream(this, CREATE_NEW, WRITE);
+        }
+        return jrtfs.newOutputStream(this, options);
+    }
+
+    final void move(JrtPath target, CopyOption... options) throws IOException {
+        if (this.jrtfs == target.jrtfs) {
+            jrtfs.copyFile(true, this, target, options);
+        } else {
+            copyToTarget(target, options);
+            delete();
+        }
+    }
+
+    final void copy(JrtPath target, CopyOption... options) throws IOException {
+        if (this.jrtfs == target.jrtfs) {
+            jrtfs.copyFile(false, this, target, options);
+        } else {
+            copyToTarget(target, options);
+        }
+    }
+
+    private void copyToTarget(JrtPath target, CopyOption... options)
+            throws IOException {
+        boolean replaceExisting = false;
+        boolean copyAttrs = false;
+        for (CopyOption opt : options) {
+            if (opt == REPLACE_EXISTING) {
+                replaceExisting = true;
+            } else if (opt == COPY_ATTRIBUTES) {
+                copyAttrs = true;
+            }
+        }
+        // attributes of source file
+        BasicFileAttributes jrtfas = getAttributes();
+        // check if target exists
+        boolean exists;
+        if (replaceExisting) {
+            try {
+                target.deleteIfExists();
+                exists = false;
+            } catch (DirectoryNotEmptyException x) {
+                exists = true;
+            }
+        } else {
+            exists = target.exists();
+        }
+        if (exists) {
+            throw new FileAlreadyExistsException(target.toString());
+        }
+        if (jrtfas.isDirectory()) {
+            // create directory or file
+            target.createDirectory();
+        } else {
+            try (InputStream is = jrtfs.newInputStream(this);
+                 OutputStream os = target.newOutputStream()) {
+                byte[] buf = new byte[8192];
+                int n;
+                while ((n = is.read(buf)) != -1) {
+                    os.write(buf, 0, n);
+                }
+            }
+        }
+        if (copyAttrs) {
+            BasicFileAttributeView view =
+                Files.getFileAttributeView(target, BasicFileAttributeView.class);
+            try {
+                view.setTimes(jrtfas.lastModifiedTime(),
+                              jrtfas.lastAccessTime(),
+                              jrtfas.creationTime());
+            } catch (IOException x) {
+                try {
+                    target.delete();  // rollback?
+                } catch (IOException ignore) {}
+                throw x;
+            }
+        }
+    }
+
+    // adopted from sun.nio.fs.UnixUriUtils
+    private static URI toUri(String str) {
+        char[] path = str.toCharArray();
+        assert path[0] == '/';
+        StringBuilder sb = new StringBuilder();
+        sb.append(path[0]);
+        for (int i = 1; i < path.length; i++) {
+            char c = (char)(path[i] & 0xff);
+            if (match(c, L_PATH, H_PATH)) {
+                sb.append(c);
+            } else {
+                sb.append('%');
+                sb.append(hexDigits[(c >> 4) & 0x0f]);
+                sb.append(hexDigits[(c) & 0x0f]);
+            }
+        }
+
+        try {
+            return new URI("jrt:" + sb.toString());
+        } catch (URISyntaxException x) {
+            throw new AssertionError(x);  // should not happen
+        }
+    }
+
+    // The following is copied from java.net.URI
+
+    // Compute the low-order mask for the characters in the given string
+    private static long lowMask(String chars) {
+        int n = chars.length();
+        long m = 0;
+        for (int i = 0; i < n; i++) {
+            char c = chars.charAt(i);
+            if (c < 64)
+                m |= (1L << c);
+        }
+        return m;
+    }
+
+    // Compute the high-order mask for the characters in the given string
+    private static long highMask(String chars) {
+        int n = chars.length();
+        long m = 0;
+        for (int i = 0; i < n; i++) {
+            char c = chars.charAt(i);
+            if ((c >= 64) && (c < 128))
+                m |= (1L << (c - 64));
+        }
+        return m;
+    }
+
+    // Compute a low-order mask for the characters
+    // between first and last, inclusive
+    private static long lowMask(char first, char last) {
+        long m = 0;
+        int f = Math.max(Math.min(first, 63), 0);
+        int l = Math.max(Math.min(last, 63), 0);
+        for (int i = f; i <= l; i++)
+            m |= 1L << i;
+        return m;
+    }
+
+    // Compute a high-order mask for the characters
+    // between first and last, inclusive
+    private static long highMask(char first, char last) {
+        long m = 0;
+        int f = Math.max(Math.min(first, 127), 64) - 64;
+        int l = Math.max(Math.min(last, 127), 64) - 64;
+        for (int i = f; i <= l; i++)
+            m |= 1L << i;
+        return m;
+    }
+
+    // Tell whether the given character is permitted by the given mask pair
+    private static boolean match(char c, long lowMask, long highMask) {
+        if (c < 64)
+            return ((1L << c) & lowMask) != 0;
+        if (c < 128)
+            return ((1L << (c - 64)) & highMask) != 0;
+        return false;
+    }
+
+    // digit    = "0" | "1" | "2" | "3" | "4" | "5" | "6" | "7" |
+    //            "8" | "9"
+    private static final long L_DIGIT = lowMask('0', '9');
+    private static final long H_DIGIT = 0L;
+
+    // upalpha  = "A" | "B" | "C" | "D" | "E" | "F" | "G" | "H" | "I" |
+    //            "J" | "K" | "L" | "M" | "N" | "O" | "P" | "Q" | "R" |
+    //            "S" | "T" | "U" | "V" | "W" | "X" | "Y" | "Z"
+    private static final long L_UPALPHA = 0L;
+    private static final long H_UPALPHA = highMask('A', 'Z');
+
+    // lowalpha = "a" | "b" | "c" | "d" | "e" | "f" | "g" | "h" | "i" |
+    //            "j" | "k" | "l" | "m" | "n" | "o" | "p" | "q" | "r" |
+    //            "s" | "t" | "u" | "v" | "w" | "x" | "y" | "z"
+    private static final long L_LOWALPHA = 0L;
+    private static final long H_LOWALPHA = highMask('a', 'z');
+
+    // alpha         = lowalpha | upalpha
+    private static final long L_ALPHA = L_LOWALPHA | L_UPALPHA;
+    private static final long H_ALPHA = H_LOWALPHA | H_UPALPHA;
+
+    // alphanum      = alpha | digit
+    private static final long L_ALPHANUM = L_DIGIT | L_ALPHA;
+    private static final long H_ALPHANUM = H_DIGIT | H_ALPHA;
+
+    // mark          = "-" | "_" | "." | "!" | "~" | "*" | "'" |
+    //                 "(" | ")"
+    private static final long L_MARK = lowMask("-_.!~*'()");
+    private static final long H_MARK = highMask("-_.!~*'()");
+
+    // unreserved    = alphanum | mark
+    private static final long L_UNRESERVED = L_ALPHANUM | L_MARK;
+    private static final long H_UNRESERVED = H_ALPHANUM | H_MARK;
+
+    // pchar         = unreserved | escaped |
+    //                 ":" | "@" | "&" | "=" | "+" | "$" | ","
+    private static final long L_PCHAR
+        = L_UNRESERVED | lowMask(":@&=+$,");
+    private static final long H_PCHAR
+        = H_UNRESERVED | highMask(":@&=+$,");
+
+   // All valid path characters
+   private static final long L_PATH = L_PCHAR | lowMask(";/");
+   private static final long H_PATH = H_PCHAR | highMask(";/");
+
+   private static final char[] hexDigits = {
+        '0', '1', '2', '3', '4', '5', '6', '7',
+        '8', '9', 'A', 'B', 'C', 'D', 'E', 'F'
+    };
+}
diff --git a/tests/test_data/std/jdk/internal/jrtfs/JrtUtils.class b/tests/test_data/std/jdk/internal/jrtfs/JrtUtils.class
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diff --git a/tests/test_data/std/jdk/internal/jrtfs/JrtUtils.java b/tests/test_data/std/jdk/internal/jrtfs/JrtUtils.java
new file mode 100644
index 00000000..29f681f5
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/jrtfs/JrtUtils.java
@@ -0,0 +1,194 @@
+/*
+ * Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package jdk.internal.jrtfs;
+
+import java.util.regex.PatternSyntaxException;
+
+/**
+ * @implNote This class needs to maintain JDK 8 source compatibility.
+ *
+ * It is used internally in the JDK to implement jimage/jrtfs access,
+ * but also compiled and delivered as part of the jrtfs.jar to support access
+ * to the jimage file provided by the shipped JDK by tools running on JDK 8.
+ */
+final class JrtUtils {
+    private JrtUtils() {}
+
+    private static final String regexMetaChars = ".^$+{[]|()";
+    private static final String globMetaChars = "\\*?[{";
+    private static boolean isRegexMeta(char c) {
+        return regexMetaChars.indexOf(c) != -1;
+    }
+    private static boolean isGlobMeta(char c) {
+        return globMetaChars.indexOf(c) != -1;
+    }
+    private static final char EOL = 0;
+    private static char next(String glob, int i) {
+        if (i < glob.length()) {
+            return glob.charAt(i);
+        }
+        return EOL;
+    }
+
+    /*
+     * Creates a regex pattern from the given glob expression.
+     *
+     * @throws  PatternSyntaxException
+     */
+    public static String toRegexPattern(String globPattern) {
+        boolean inGroup = false;
+        StringBuilder regex = new StringBuilder("^");
+
+        int i = 0;
+        while (i < globPattern.length()) {
+            char c = globPattern.charAt(i++);
+            switch (c) {
+                case '\\':
+                    // escape special characters
+                    if (i == globPattern.length()) {
+                        throw new PatternSyntaxException("No character to escape",
+                                globPattern, i - 1);
+                    }
+                    char next = globPattern.charAt(i++);
+                    if (isGlobMeta(next) || isRegexMeta(next)) {
+                        regex.append('\\');
+                    }
+                    regex.append(next);
+                    break;
+                case '/':
+                    regex.append(c);
+                    break;
+                case '[':
+                    // don't match name separator in class
+                    regex.append("[[^/]&&[");
+                    if (next(globPattern, i) == '^') {
+                        // escape the regex negation char if it appears
+                        regex.append("\\^");
+                        i++;
+                    } else {
+                        // negation
+                        if (next(globPattern, i) == '!') {
+                            regex.append('^');
+                            i++;
+                        }
+                        // hyphen allowed at start
+                        if (next(globPattern, i) == '-') {
+                            regex.append('-');
+                            i++;
+                        }
+                    }
+                    boolean hasRangeStart = false;
+                    char last = 0;
+                    while (i < globPattern.length()) {
+                        c = globPattern.charAt(i++);
+                        if (c == ']') {
+                            break;
+                        }
+                        if (c == '/') {
+                            throw new PatternSyntaxException("Explicit 'name separator' in class",
+                                    globPattern, i - 1);
+                        }
+                        // TBD: how to specify ']' in a class?
+                        if (c == '\\' || c == '[' ||
+                                c == '&' && next(globPattern, i) == '&') {
+                            // escape '\', '[' or "&&" for regex class
+                            regex.append('\\');
+                        }
+                        regex.append(c);
+
+                        if (c == '-') {
+                            if (!hasRangeStart) {
+                                throw new PatternSyntaxException("Invalid range",
+                                        globPattern, i - 1);
+                            }
+                            if ((c = next(globPattern, i++)) == EOL || c == ']') {
+                                break;
+                            }
+                            if (c < last) {
+                                throw new PatternSyntaxException("Invalid range",
+                                        globPattern, i - 3);
+                            }
+                            regex.append(c);
+                            hasRangeStart = false;
+                        } else {
+                            hasRangeStart = true;
+                            last = c;
+                        }
+                    }
+                    if (c != ']') {
+                        throw new PatternSyntaxException("Missing ']", globPattern, i - 1);
+                    }
+                    regex.append("]]");
+                    break;
+                case '{':
+                    if (inGroup) {
+                        throw new PatternSyntaxException("Cannot nest groups",
+                                globPattern, i - 1);
+                    }
+                    regex.append("(?:(?:");
+                    inGroup = true;
+                    break;
+                case '}':
+                    if (inGroup) {
+                        regex.append("))");
+                        inGroup = false;
+                    } else {
+                        regex.append('}');
+                    }
+                    break;
+                case ',':
+                    if (inGroup) {
+                        regex.append(")|(?:");
+                    } else {
+                        regex.append(',');
+                    }
+                    break;
+                case '*':
+                    if (next(globPattern, i) == '*') {
+                        // crosses directory boundaries
+                        regex.append(".*");
+                        i++;
+                    } else {
+                        // within directory boundary
+                        regex.append("[^/]*");
+                    }
+                    break;
+                case '?':
+                   regex.append("[^/]");
+                   break;
+                default:
+                    if (isRegexMeta(c)) {
+                        regex.append('\\');
+                    }
+                    regex.append(c);
+            }
+        }
+        if (inGroup) {
+            throw new PatternSyntaxException("Missing '}", globPattern, i - 1);
+        }
+        return regex.append('$').toString();
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/jrtfs/SystemImage$1.class b/tests/test_data/std/jdk/internal/jrtfs/SystemImage$1.class
new file mode 100644
index 0000000000000000000000000000000000000000..3f45add606e0ff0bae5f493f4f82e4de49b81147
GIT binary patch
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/jrtfs/SystemImage$2.class b/tests/test_data/std/jdk/internal/jrtfs/SystemImage$2.class
new file mode 100644
index 0000000000000000000000000000000000000000..1b9a0aa1ea034117700e9c9436431859cc06a090
GIT binary patch
literal 993
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/jrtfs/SystemImage.class b/tests/test_data/std/jdk/internal/jrtfs/SystemImage.class
new file mode 100644
index 0000000000000000000000000000000000000000..9a09958edc56237e8aaa10408ff23eba6420d1d5
GIT binary patch
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/jrtfs/SystemImage.java b/tests/test_data/std/jdk/internal/jrtfs/SystemImage.java
new file mode 100644
index 00000000..e1770d9c
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/jrtfs/SystemImage.java
@@ -0,0 +1,131 @@
+/*
+ * Copyright (c) 2014, 2021, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package jdk.internal.jrtfs;
+
+import java.io.IOException;
+import java.net.URISyntaxException;
+import java.net.URL;
+import java.nio.file.Files;
+import java.nio.file.FileSystem;
+import java.nio.file.FileSystems;
+import java.nio.file.FileSystemNotFoundException;
+import java.nio.file.Path;
+import java.nio.file.Paths;
+import java.security.AccessController;
+import java.security.CodeSource;
+import java.security.PrivilegedAction;
+
+import jdk.internal.jimage.ImageReader;
+import jdk.internal.jimage.ImageReader.Node;
+
+/**
+ * @implNote This class needs to maintain JDK 8 source compatibility.
+ *
+ * It is used internally in the JDK to implement jimage/jrtfs access,
+ * but also compiled and delivered as part of the jrtfs.jar to support access
+ * to the jimage file provided by the shipped JDK by tools running on JDK 8.
+ */
+@SuppressWarnings("removal")
+abstract class SystemImage {
+
+    abstract Node findNode(String path) throws IOException;
+    abstract byte[] getResource(Node node) throws IOException;
+    abstract void close() throws IOException;
+
+    static SystemImage open() throws IOException {
+        if (modulesImageExists) {
+            // open a .jimage and build directory structure
+            final ImageReader image = ImageReader.open(moduleImageFile);
+            image.getRootDirectory();
+            return new SystemImage() {
+                @Override
+                Node findNode(String path) throws IOException {
+                    return image.findNode(path);
+                }
+                @Override
+                byte[] getResource(Node node) throws IOException {
+                    return image.getResource(node);
+                }
+                @Override
+                void close() throws IOException {
+                    image.close();
+                }
+            };
+        }
+        if (Files.notExists(explodedModulesDir))
+            throw new FileSystemNotFoundException(explodedModulesDir.toString());
+        return new ExplodedImage(explodedModulesDir);
+    }
+
+    static final String RUNTIME_HOME;
+    // "modules" jimage file Path
+    static final Path moduleImageFile;
+    // "modules" jimage exists or not?
+    static final boolean modulesImageExists;
+    // <JAVA_HOME>/modules directory Path
+    static final Path explodedModulesDir;
+
+    static {
+        PrivilegedAction<String> pa = SystemImage::findHome;
+        RUNTIME_HOME = AccessController.doPrivileged(pa);
+
+        FileSystem fs = FileSystems.getDefault();
+        moduleImageFile = fs.getPath(RUNTIME_HOME, "lib", "modules");
+        explodedModulesDir = fs.getPath(RUNTIME_HOME, "modules");
+
+        modulesImageExists = AccessController.doPrivileged(
+            new PrivilegedAction<Boolean>() {
+                @Override
+                public Boolean run() {
+                    return Files.isRegularFile(moduleImageFile);
+                }
+            });
+    }
+
+    /**
+     * Returns the appropriate JDK home for this usage of the FileSystemProvider.
+     * When the CodeSource is null (null loader) then jrt:/ is the current runtime,
+     * otherwise the JDK home is located relative to jrt-fs.jar.
+     */
+    private static String findHome() {
+        CodeSource cs = SystemImage.class.getProtectionDomain().getCodeSource();
+        if (cs == null)
+            return System.getProperty("java.home");
+
+        // assume loaded from $TARGETJDK/lib/jrt-fs.jar
+        URL url = cs.getLocation();
+        if (!url.getProtocol().equalsIgnoreCase("file"))
+            throw new InternalError(url + " loaded in unexpected way");
+        try {
+            Path lib = Paths.get(url.toURI()).getParent();
+            if (!lib.getFileName().toString().equals("lib"))
+                throw new InternalError(url + " unexpected path");
+
+            return lib.getParent().toString();
+        } catch (URISyntaxException e) {
+            throw new InternalError(e);
+        }
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/loader/AbstractClassLoaderValue$Memoizer$RecursiveInvocationException.class b/tests/test_data/std/jdk/internal/loader/AbstractClassLoaderValue$Memoizer$RecursiveInvocationException.class
new file mode 100644
index 0000000000000000000000000000000000000000..0aedf370599da71138b1a87d7e340475a6e54aef
GIT binary patch
literal 751
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/loader/AbstractClassLoaderValue$Memoizer.class b/tests/test_data/std/jdk/internal/loader/AbstractClassLoaderValue$Memoizer.class
new file mode 100644
index 0000000000000000000000000000000000000000..54fb01b4eb37cf8bbd6fdd29ab5aab6985086bf1
GIT binary patch
literal 2558
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diff --git a/tests/test_data/std/jdk/internal/loader/AbstractClassLoaderValue$Sub.class b/tests/test_data/std/jdk/internal/loader/AbstractClassLoaderValue$Sub.class
new file mode 100644
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diff --git a/tests/test_data/std/jdk/internal/loader/AbstractClassLoaderValue.class b/tests/test_data/std/jdk/internal/loader/AbstractClassLoaderValue.class
new file mode 100644
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HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/loader/AbstractClassLoaderValue.java b/tests/test_data/std/jdk/internal/loader/AbstractClassLoaderValue.java
new file mode 100644
index 00000000..739f9c0d
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/loader/AbstractClassLoaderValue.java
@@ -0,0 +1,434 @@
+/*
+ * Copyright (c) 2016, 2019, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package jdk.internal.loader;
+
+import jdk.internal.access.JavaLangAccess;
+import jdk.internal.access.SharedSecrets;
+
+import java.lang.reflect.UndeclaredThrowableException;
+import java.util.Iterator;
+import java.util.Objects;
+import java.util.concurrent.ConcurrentHashMap;
+import java.util.function.BiFunction;
+import java.util.function.Supplier;
+
+/**
+ * AbstractClassLoaderValue is a superclass of root-{@link ClassLoaderValue}
+ * and {@link Sub sub}-ClassLoaderValue.
+ *
+ * @param <CLV> the type of concrete ClassLoaderValue (this type)
+ * @param <V>   the type of values associated with ClassLoaderValue
+ */
+public abstract class AbstractClassLoaderValue<CLV extends AbstractClassLoaderValue<CLV, V>, V> {
+
+    /**
+     * Sole constructor.
+     */
+    AbstractClassLoaderValue() {}
+
+    /**
+     * Returns the key component of this ClassLoaderValue. The key component of
+     * the root-{@link ClassLoaderValue} is the ClassLoaderValue itself,
+     * while the key component of a {@link #sub(Object) sub}-ClassLoaderValue
+     * is what was given to construct it.
+     *
+     * @return the key component of this ClassLoaderValue.
+     */
+    public abstract Object key();
+
+    /**
+     * Constructs new sub-ClassLoaderValue of this ClassLoaderValue with given
+     * key component.
+     *
+     * @param key the key component of the sub-ClassLoaderValue.
+     * @param <K> the type of the key component.
+     * @return a sub-ClassLoaderValue of this ClassLoaderValue for given key
+     */
+    public <K> Sub<K> sub(K key) {
+        return new Sub<>(key);
+    }
+
+    /**
+     * Returns {@code true} if this ClassLoaderValue is equal to given {@code clv}
+     * or if this ClassLoaderValue was derived from given {@code clv} by a chain
+     * of {@link #sub(Object)} invocations.
+     *
+     * @param clv the ClassLoaderValue to test this against
+     * @return if this ClassLoaderValue is equal to given {@code clv} or
+     * its descendant
+     */
+    public abstract boolean isEqualOrDescendantOf(AbstractClassLoaderValue<?, V> clv);
+
+    /**
+     * Returns the value associated with this ClassLoaderValue and given ClassLoader
+     * or {@code null} if there is none.
+     *
+     * @param cl the ClassLoader for the associated value
+     * @return the value associated with this ClassLoaderValue and given ClassLoader
+     * or {@code null} if there is none.
+     */
+    public V get(ClassLoader cl) {
+        Object val = AbstractClassLoaderValue.<CLV>map(cl).get(this);
+        try {
+            return extractValue(val);
+        } catch (Memoizer.RecursiveInvocationException e) {
+            // propagate recursive get() for the same key that is just
+            // being calculated in computeIfAbsent()
+            throw e;
+        } catch (Throwable t) {
+            // don't propagate exceptions thrown from Memoizer - pretend
+            // that there was no entry
+            // (computeIfAbsent invocation will try to remove it anyway)
+            return null;
+        }
+    }
+
+    /**
+     * Associates given value {@code v} with this ClassLoaderValue and given
+     * ClassLoader and returns {@code null} if there was no previously associated
+     * value or does nothing and returns previously associated value if there
+     * was one.
+     *
+     * @param cl the ClassLoader for the associated value
+     * @param v  the value to associate
+     * @return previously associated value or null if there was none
+     */
+    public V putIfAbsent(ClassLoader cl, V v) {
+        ConcurrentHashMap<CLV, Object> map = map(cl);
+        @SuppressWarnings("unchecked")
+        CLV clv = (CLV) this;
+        while (true) {
+            try {
+                Object val = map.putIfAbsent(clv, v);
+                return extractValue(val);
+            } catch (Memoizer.RecursiveInvocationException e) {
+                // propagate RecursiveInvocationException for the same key that
+                // is just being calculated in computeIfAbsent
+                throw e;
+            } catch (Throwable t) {
+                // don't propagate exceptions thrown from foreign Memoizer -
+                // pretend that there was no entry and retry
+                // (foreign computeIfAbsent invocation will try to remove it anyway)
+            }
+            // TODO:
+            // Thread.onSpinLoop(); // when available
+        }
+    }
+
+    /**
+     * Removes the value associated with this ClassLoaderValue and given
+     * ClassLoader if the associated value is equal to given value {@code v} and
+     * returns {@code true} or does nothing and returns {@code false} if there is
+     * no currently associated value or it is not equal to given value {@code v}.
+     *
+     * @param cl the ClassLoader for the associated value
+     * @param v  the value to compare with currently associated value
+     * @return {@code true} if the association was removed or {@code false} if not
+     */
+    public boolean remove(ClassLoader cl, Object v) {
+        return AbstractClassLoaderValue.<CLV>map(cl).remove(this, v);
+    }
+
+    /**
+     * Returns the value associated with this ClassLoaderValue and given
+     * ClassLoader if there is one or computes the value by invoking given
+     * {@code mappingFunction}, associates it and returns it.
+     * <p>
+     * Computation and association of the computed value is performed atomically
+     * by the 1st thread that requests a particular association while holding a
+     * lock associated with this ClassLoaderValue and given ClassLoader.
+     * Nested calls from the {@code mappingFunction} to {@link #get},
+     * {@link #putIfAbsent} or {@link #computeIfAbsent} for the same association
+     * are not allowed and throw {@link IllegalStateException}. Nested call to
+     * {@link #remove} for the same association is allowed but will always return
+     * {@code false} regardless of passed-in comparison value. Nested calls for
+     * other association(s) are allowed, but care should be taken to avoid
+     * deadlocks. When two threads perform nested computations of the overlapping
+     * set of associations they should always request them in the same order.
+     *
+     * @param cl              the ClassLoader for the associated value
+     * @param mappingFunction the function to compute the value
+     * @return the value associated with this ClassLoaderValue and given
+     * ClassLoader.
+     * @throws IllegalStateException if a direct or indirect invocation from
+     *                               within given {@code mappingFunction} that
+     *                               computes the value of a particular association
+     *                               to {@link #get}, {@link #putIfAbsent} or
+     *                               {@link #computeIfAbsent}
+     *                               for the same association is attempted.
+     */
+    public V computeIfAbsent(ClassLoader cl,
+                             BiFunction<
+                                 ? super ClassLoader,
+                                 ? super CLV,
+                                 ? extends V
+                                 > mappingFunction) throws IllegalStateException {
+        ConcurrentHashMap<CLV, Object> map = map(cl);
+        @SuppressWarnings("unchecked")
+        CLV clv = (CLV) this;
+        Memoizer<CLV, V> mv = null;
+        while (true) {
+            Object val = (mv == null) ? map.get(clv) : map.putIfAbsent(clv, mv);
+            if (val == null) {
+                if (mv == null) {
+                    // create Memoizer lazily when 1st needed and restart loop
+                    mv = new Memoizer<>(cl, clv, mappingFunction);
+                    continue;
+                }
+                // mv != null, therefore sv == null was a result of successful
+                // putIfAbsent
+                try {
+                    // trigger Memoizer to compute the value
+                    V v = mv.get();
+                    // attempt to replace our Memoizer with the value
+                    map.replace(clv, mv, v);
+                    // return computed value
+                    return v;
+                } catch (Throwable t) {
+                    // our Memoizer has thrown, attempt to remove it
+                    map.remove(clv, mv);
+                    // propagate exception because it's from our Memoizer
+                    throw t;
+                }
+            } else {
+                try {
+                    return extractValue(val);
+                } catch (Memoizer.RecursiveInvocationException e) {
+                    // propagate recursive attempts to calculate the same
+                    // value as being calculated at the moment
+                    throw e;
+                } catch (Throwable t) {
+                    // don't propagate exceptions thrown from foreign Memoizer -
+                    // pretend that there was no entry and retry
+                    // (foreign computeIfAbsent invocation will try to remove it anyway)
+                }
+            }
+            // TODO:
+            // Thread.onSpinLoop(); // when available
+        }
+    }
+
+    /**
+     * Removes all values associated with given ClassLoader {@code cl} and
+     * {@link #isEqualOrDescendantOf(AbstractClassLoaderValue) this or descendants}
+     * of this ClassLoaderValue.
+     * This is not an atomic operation. Other threads may see some associations
+     * be already removed and others still present while this method is executing.
+     * <p>
+     * The sole intention of this method is to cleanup after a unit test that
+     * tests ClassLoaderValue directly. It is not intended for use in
+     * actual algorithms.
+     *
+     * @param cl the associated ClassLoader of the values to be removed
+     */
+    public void removeAll(ClassLoader cl) {
+        ConcurrentHashMap<CLV, Object> map = map(cl);
+        for (Iterator<CLV> i = map.keySet().iterator(); i.hasNext(); ) {
+            if (i.next().isEqualOrDescendantOf(this)) {
+                i.remove();
+            }
+        }
+    }
+
+    private static final JavaLangAccess JLA = SharedSecrets.getJavaLangAccess();
+
+    /**
+     * @return a ConcurrentHashMap for given ClassLoader
+     */
+    @SuppressWarnings("unchecked")
+    private static <CLV extends AbstractClassLoaderValue<CLV, ?>>
+    ConcurrentHashMap<CLV, Object> map(ClassLoader cl) {
+        return (ConcurrentHashMap<CLV, Object>)
+            (cl == null ? BootLoader.getClassLoaderValueMap()
+                        : JLA.createOrGetClassLoaderValueMap(cl));
+    }
+
+    /**
+     * @return value extracted from the {@link Memoizer} if given
+     * {@code memoizerOrValue} parameter is a {@code Memoizer} or
+     * just return given parameter.
+     */
+    @SuppressWarnings("unchecked")
+    private V extractValue(Object memoizerOrValue) {
+        if (memoizerOrValue instanceof Memoizer) {
+            return ((Memoizer<?, V>) memoizerOrValue).get();
+        } else {
+            return (V) memoizerOrValue;
+        }
+    }
+
+    /**
+     * A memoized supplier that invokes given {@code mappingFunction} just once
+     * and remembers the result or thrown exception for subsequent calls.
+     * If given mappingFunction returns null, it is converted to NullPointerException,
+     * thrown from the Memoizer's {@link #get()} method and remembered.
+     * If the Memoizer is invoked recursively from the given {@code mappingFunction},
+     * {@link RecursiveInvocationException} is thrown, but it is not remembered.
+     * The in-flight call to the {@link #get()} can still complete successfully if
+     * such exception is handled by the mappingFunction.
+     */
+    private static final class Memoizer<CLV extends AbstractClassLoaderValue<CLV, V>, V>
+        implements Supplier<V> {
+
+        private final ClassLoader cl;
+        private final CLV clv;
+        private final BiFunction<? super ClassLoader, ? super CLV, ? extends V>
+            mappingFunction;
+
+        private volatile V v;
+        private volatile Throwable t;
+        private boolean inCall;
+
+        Memoizer(ClassLoader cl,
+                 CLV clv,
+                 BiFunction<? super ClassLoader, ? super CLV, ? extends V>
+                     mappingFunction
+        ) {
+            this.cl = cl;
+            this.clv = clv;
+            this.mappingFunction = mappingFunction;
+        }
+
+        @Override
+        public V get() throws RecursiveInvocationException {
+            V v = this.v;
+            if (v != null) return v;
+            Throwable t = this.t;
+            if (t == null) {
+                synchronized (this) {
+                    if ((v = this.v) == null && (t = this.t) == null) {
+                        if (inCall) {
+                            throw new RecursiveInvocationException();
+                        }
+                        inCall = true;
+                        try {
+                            this.v = v = Objects.requireNonNull(
+                                mappingFunction.apply(cl, clv));
+                        } catch (Throwable x) {
+                            this.t = t = x;
+                        } finally {
+                            inCall = false;
+                        }
+                    }
+                }
+            }
+            if (v != null) return v;
+            if (t instanceof Error) {
+                throw (Error) t;
+            } else if (t instanceof RuntimeException) {
+                throw (RuntimeException) t;
+            } else {
+                throw new UndeclaredThrowableException(t);
+            }
+        }
+
+        static class RecursiveInvocationException extends IllegalStateException {
+            @java.io.Serial
+            private static final long serialVersionUID = 1L;
+
+            RecursiveInvocationException() {
+                super("Recursive call");
+            }
+        }
+    }
+
+    /**
+     * sub-ClassLoaderValue is an inner class of {@link AbstractClassLoaderValue}
+     * and also a subclass of it. It can therefore be instantiated as an inner
+     * class of either an instance of root-{@link ClassLoaderValue} or another
+     * instance of itself. This enables composing type-safe compound keys of
+     * arbitrary length:
+     * <pre>{@code
+     * ClassLoaderValue<V> clv = new ClassLoaderValue<>();
+     * ClassLoaderValue<V>.Sub<K1>.Sub<K2>.Sub<K3> clv_k123 =
+     *     clv.sub(k1).sub(k2).sub(k3);
+     * }</pre>
+     * From which individual components are accessible in a type-safe way:
+     * <pre>{@code
+     * K1 k1 = clv_k123.parent().parent().key();
+     * K2 k2 = clv_k123.parent().key();
+     * K3 k3 = clv_k123.key();
+     * }</pre>
+     * This allows specifying non-capturing lambdas for the mapping function of
+     * {@link #computeIfAbsent(ClassLoader, BiFunction)} operation that can
+     * access individual key components from passed-in
+     * sub-[sub-...]ClassLoaderValue instance in a type-safe way.
+     *
+     * @param <K> the type of {@link #key()} component contained in the
+     *            sub-ClassLoaderValue.
+     */
+    public final class Sub<K> extends AbstractClassLoaderValue<Sub<K>, V> {
+
+        private final K key;
+
+        Sub(K key) {
+            this.key = key;
+        }
+
+        /**
+         * @return the parent ClassLoaderValue this sub-ClassLoaderValue
+         * has been {@link #sub(Object) derived} from.
+         */
+        public AbstractClassLoaderValue<CLV, V> parent() {
+            return AbstractClassLoaderValue.this;
+        }
+
+        /**
+         * @return the key component of this sub-ClassLoaderValue.
+         */
+        @Override
+        public K key() {
+            return key;
+        }
+
+        /**
+         * sub-ClassLoaderValue is a descendant of given {@code clv} if it is
+         * either equal to it or if its {@link #parent() parent} is a
+         * descendant of given {@code clv}.
+         */
+        @Override
+        public boolean isEqualOrDescendantOf(AbstractClassLoaderValue<?, V> clv) {
+            return equals(Objects.requireNonNull(clv)) ||
+                   parent().isEqualOrDescendantOf(clv);
+        }
+
+        @Override
+        public boolean equals(Object o) {
+            if (this == o) return true;
+            if (!(o instanceof Sub)) return false;
+            @SuppressWarnings("unchecked")
+            Sub<?> that = (Sub<?>) o;
+            return this.parent().equals(that.parent()) &&
+                   Objects.equals(this.key, that.key);
+        }
+
+        @Override
+        public int hashCode() {
+            return 31 * parent().hashCode() +
+                   Objects.hashCode(key);
+        }
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/loader/ArchivedClassLoaders.class b/tests/test_data/std/jdk/internal/loader/ArchivedClassLoaders.class
new file mode 100644
index 0000000000000000000000000000000000000000..41934abe869652931aedbb07d2bf237c056b537f
GIT binary patch
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diff --git a/tests/test_data/std/jdk/internal/loader/ArchivedClassLoaders.java b/tests/test_data/std/jdk/internal/loader/ArchivedClassLoaders.java
new file mode 100644
index 00000000..9fcb8cc5
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/loader/ArchivedClassLoaders.java
@@ -0,0 +1,96 @@
+/*
+ * Copyright (c) 2020, 2021, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package jdk.internal.loader;
+
+import java.util.Map;
+import jdk.internal.misc.CDS;
+import jdk.internal.module.ServicesCatalog;
+
+/**
+ * Used to archive the built-in class loaders, their services catalogs, and the
+ * package-to-module map used by the built-in class loaders.
+ */
+class ArchivedClassLoaders {
+    private static ArchivedClassLoaders archivedClassLoaders;
+
+    private final ClassLoader bootLoader;
+    private final ClassLoader platformLoader;
+    private final ClassLoader appLoader;
+    private final ServicesCatalog[] servicesCatalogs;
+    private final Map<String, ?> packageToModule;
+
+    private ArchivedClassLoaders() {
+        bootLoader = ClassLoaders.bootLoader();
+        platformLoader = ClassLoaders.platformClassLoader();
+        appLoader = ClassLoaders.appClassLoader();
+
+        servicesCatalogs = new ServicesCatalog[3];
+        servicesCatalogs[0] = ServicesCatalog.getServicesCatalog(bootLoader);
+        servicesCatalogs[1] = ServicesCatalog.getServicesCatalog(platformLoader);
+        servicesCatalogs[2] = ServicesCatalog.getServicesCatalog(appLoader);
+
+        packageToModule = BuiltinClassLoader.packageToModule();
+    }
+
+    ClassLoader bootLoader() {
+        return bootLoader;
+    }
+
+    ClassLoader platformLoader() {
+        return platformLoader;
+    }
+
+    ClassLoader appLoader() {
+        return appLoader;
+    }
+
+    ServicesCatalog servicesCatalog(ClassLoader loader) {
+        if (loader == bootLoader) {
+            return servicesCatalogs[0];
+        } else if (loader == platformLoader) {
+            return servicesCatalogs[1];
+        } else if (loader == appLoader) {
+            return servicesCatalogs[2];
+        } else {
+            throw new InternalError();
+        }
+    }
+
+    Map<String, ?> packageToModule() {
+        return packageToModule;
+    }
+
+    static void archive() {
+        archivedClassLoaders = new ArchivedClassLoaders();
+    }
+
+    static ArchivedClassLoaders get() {
+        return archivedClassLoaders;
+    }
+
+    static {
+        CDS.initializeFromArchive(ArchivedClassLoaders.class);
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/loader/BootLoader$1.class b/tests/test_data/std/jdk/internal/loader/BootLoader$1.class
new file mode 100644
index 0000000000000000000000000000000000000000..c997a00e8c2d50fe9e28a04c0ec5332879fcaaa9
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diff --git a/tests/test_data/std/jdk/internal/loader/BootLoader$PackageHelper$1.class b/tests/test_data/std/jdk/internal/loader/BootLoader$PackageHelper$1.class
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diff --git a/tests/test_data/std/jdk/internal/loader/BootLoader$PackageHelper$2.class b/tests/test_data/std/jdk/internal/loader/BootLoader$PackageHelper$2.class
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diff --git a/tests/test_data/std/jdk/internal/loader/BootLoader$PackageHelper.class b/tests/test_data/std/jdk/internal/loader/BootLoader$PackageHelper.class
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diff --git a/tests/test_data/std/jdk/internal/loader/BootLoader.class b/tests/test_data/std/jdk/internal/loader/BootLoader.class
new file mode 100644
index 0000000000000000000000000000000000000000..8348e1b11dae5714741940ea52e529b212111666
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diff --git a/tests/test_data/std/jdk/internal/loader/BootLoader.java b/tests/test_data/std/jdk/internal/loader/BootLoader.java
new file mode 100644
index 00000000..98ff60a7
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/loader/BootLoader.java
@@ -0,0 +1,348 @@
+/*
+ * Copyright (c) 2015, 2022, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package jdk.internal.loader;
+
+import java.io.IOException;
+import java.io.InputStream;
+import java.lang.module.ModuleReference;
+import java.net.MalformedURLException;
+import java.net.URI;
+import java.net.URL;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.security.AccessController;
+import java.security.PrivilegedAction;
+import java.util.Arrays;
+import java.util.Enumeration;
+import java.util.concurrent.ConcurrentHashMap;
+import java.util.jar.JarInputStream;
+import java.util.jar.Manifest;
+import java.util.stream.Stream;
+
+import jdk.internal.access.JavaLangAccess;
+import jdk.internal.access.SharedSecrets;
+import jdk.internal.module.Modules;
+import jdk.internal.module.ServicesCatalog;
+import jdk.internal.util.StaticProperty;
+
+/**
+ * Find resources and packages in modules defined to the boot class loader or
+ * resources and packages on the "boot class path" specified via -Xbootclasspath/a.
+ */
+
+public class BootLoader {
+    private BootLoader() { }
+
+    private static final JavaLangAccess JLA = SharedSecrets.getJavaLangAccess();
+
+    // The unnamed module for the boot loader
+    private static final Module UNNAMED_MODULE;
+    private static final String JAVA_HOME = StaticProperty.javaHome();
+
+    static {
+        JavaLangAccess jla = SharedSecrets.getJavaLangAccess();
+        UNNAMED_MODULE = jla.defineUnnamedModule(null);
+        jla.addEnableNativeAccess(UNNAMED_MODULE);
+        setBootLoaderUnnamedModule0(UNNAMED_MODULE);
+    }
+
+    // ClassLoaderValue map for the boot class loader
+    private static final ConcurrentHashMap<?, ?> CLASS_LOADER_VALUE_MAP
+        = new ConcurrentHashMap<>();
+
+    // native libraries loaded by the boot class loader
+    private static final NativeLibraries NATIVE_LIBS
+        = NativeLibraries.newInstance(null);
+
+    /**
+     * Returns the unnamed module for the boot loader.
+     */
+    public static Module getUnnamedModule() {
+        return UNNAMED_MODULE;
+    }
+
+    /**
+     * Returns the ServiceCatalog for modules defined to the boot class loader.
+     */
+    public static ServicesCatalog getServicesCatalog() {
+        return ServicesCatalog.getServicesCatalog(ClassLoaders.bootLoader());
+    }
+
+    /**
+     * Returns the ClassLoaderValue map for the boot class loader.
+     */
+    public static ConcurrentHashMap<?, ?> getClassLoaderValueMap() {
+        return CLASS_LOADER_VALUE_MAP;
+    }
+
+    /**
+     * Returns NativeLibraries for the boot class loader.
+     */
+    public static NativeLibraries getNativeLibraries() {
+        return NATIVE_LIBS;
+    }
+
+    /**
+     * Returns {@code true} if there is a class path associated with the
+     * BootLoader.
+     */
+    public static boolean hasClassPath() {
+        return ClassLoaders.bootLoader().hasClassPath();
+    }
+
+    /**
+     * Registers a module with this class loader so that its classes
+     * (and resources) become visible via this class loader.
+     */
+    public static void loadModule(ModuleReference mref) {
+        ClassLoaders.bootLoader().loadModule(mref);
+    }
+
+    /**
+     * Loads the Class object with the given name defined to the boot loader.
+     */
+    public static Class<?> loadClassOrNull(String name) {
+        return JLA.findBootstrapClassOrNull(name);
+    }
+
+    /**
+     * Loads the Class object with the given name in the given module
+     * defined to the boot loader. Returns {@code null} if not found.
+     */
+    public static Class<?> loadClass(Module module, String name) {
+        Class<?> c = loadClassOrNull(name);
+        if (c != null && c.getModule() == module) {
+            return c;
+        } else {
+            return null;
+        }
+    }
+
+    /**
+     * Loads a native library from the system library path.
+     */
+    @SuppressWarnings("removal")
+    public static void loadLibrary(String name) {
+        if (System.getSecurityManager() == null) {
+            BootLoader.getNativeLibraries().loadLibrary(name);
+        } else {
+            AccessController.doPrivileged(new java.security.PrivilegedAction<>() {
+                public Void run() {
+                    BootLoader.getNativeLibraries().loadLibrary(name);
+                    return null;
+                }
+            });
+        }
+    }
+
+    /**
+     * Returns a URL to a resource in a module defined to the boot loader.
+     */
+    public static URL findResource(String mn, String name) throws IOException {
+        return ClassLoaders.bootLoader().findResource(mn, name);
+    }
+
+    /**
+     * Returns an input stream to a resource in a module defined to the
+     * boot loader.
+     */
+    public static InputStream findResourceAsStream(String mn, String name)
+        throws IOException
+    {
+        return ClassLoaders.bootLoader().findResourceAsStream(mn, name);
+    }
+
+    /**
+     * Returns the URL to the given resource in any of the modules
+     * defined to the boot loader and the boot class path.
+     */
+    public static URL findResource(String name) {
+        return ClassLoaders.bootLoader().findResource(name);
+    }
+
+    /**
+     * Returns an Iterator to iterate over the resources of the given name
+     * in any of the modules defined to the boot loader.
+     */
+    public static Enumeration<URL> findResources(String name) throws IOException {
+        return ClassLoaders.bootLoader().findResources(name);
+    }
+
+    /**
+     * Define a package for the given class to the boot loader, if not already
+     * defined.
+     */
+    public static Package definePackage(Class<?> c) {
+        return getDefinedPackage(c.getPackageName());
+    }
+
+    /**
+     * Returns the Package of the given name defined to the boot loader or null
+     * if the package has not been defined.
+     */
+    public static Package getDefinedPackage(String pn) {
+        Package pkg = ClassLoaders.bootLoader().getDefinedPackage(pn);
+        if (pkg == null) {
+            String location = getSystemPackageLocation(pn.replace('.', '/'));
+            if (location != null) {
+                pkg = PackageHelper.definePackage(pn.intern(), location);
+            }
+        }
+        return pkg;
+    }
+
+    /**
+     * Returns a stream of the packages defined to the boot loader.
+     */
+    public static Stream<Package> packages() {
+        return Arrays.stream(getSystemPackageNames())
+                     .map(name -> getDefinedPackage(name.replace('/', '.')));
+    }
+
+    /**
+     * Helper class to define {@code Package} objects for packages in modules
+     * defined to the boot loader.
+     */
+    static class PackageHelper {
+        private static final JavaLangAccess JLA = SharedSecrets.getJavaLangAccess();
+
+        /**
+         * Define the {@code Package} with the given name. The specified
+         * location is a jrt URL to a named module in the run-time image,
+         * a file URL to a module in an exploded run-time image, or a file
+         * path to an entry on the boot class path (java agent Boot-Class-Path
+         * or -Xbootclasspath/a.
+         *
+         * <p> If the given location is a JAR file containing a manifest,
+         * the defined Package contains the versioning information from
+         * the manifest, if present.
+         *
+         * @param name     package name
+         * @param location location where the package is (jrt URL or file URL
+         *                 for a named module in the run-time or exploded image;
+         *                 a file path for a package from -Xbootclasspath/a)
+         */
+        static Package definePackage(String name, String location) {
+            Module module = findModule(location);
+            if (module != null) {
+                // named module from runtime image or exploded module
+                if (name.isEmpty())
+                    throw new InternalError("empty package in " + location);
+                return JLA.definePackage(ClassLoaders.bootLoader(), name, module);
+            }
+
+            // package in unnamed module (-Xbootclasspath/a)
+            URL url = toFileURL(location);
+            Manifest man = url != null ? getManifest(location) : null;
+
+            return ClassLoaders.bootLoader().defineOrCheckPackage(name, man, url);
+        }
+
+        /**
+         * Finds the module at the given location defined to the boot loader.
+         * The module is either in runtime image or exploded image.
+         * Otherwise this method returns null.
+         */
+        private static Module findModule(String location) {
+            String mn = null;
+            if (location.startsWith("jrt:/")) {
+                // named module in runtime image ("jrt:/".length() == 5)
+                mn = location.substring(5, location.length());
+            } else if (location.startsWith("file:/")) {
+                // named module in exploded image
+                Path path = Path.of(URI.create(location));
+                Path modulesDir = Path.of(JAVA_HOME, "modules");
+                if (path.startsWith(modulesDir)) {
+                    mn = path.getFileName().toString();
+                }
+            }
+
+            // return the Module object for the module name. The Module may
+            // in the boot layer or a child layer for the case that the module
+            // is loaded into a running VM
+            if (mn != null) {
+                String name = mn;
+                return Modules.findLoadedModule(mn)
+                    .orElseThrow(() -> new InternalError(name + " not loaded"));
+            } else {
+                return null;
+            }
+        }
+
+        /**
+         * Returns URL if the given location is a regular file path.
+         */
+        @SuppressWarnings("removal")
+        private static URL toFileURL(String location) {
+            return AccessController.doPrivileged(new PrivilegedAction<>() {
+                public URL run() {
+                    Path path = Path.of(location);
+                    if (Files.isRegularFile(path)) {
+                        try {
+                            return path.toUri().toURL();
+                        } catch (MalformedURLException e) {}
+                    }
+                    return null;
+                }
+            });
+        }
+
+        /**
+         * Returns the Manifest if the given location is a JAR file
+         * containing a manifest.
+         */
+        @SuppressWarnings("removal")
+        private static Manifest getManifest(String location) {
+            return AccessController.doPrivileged(new PrivilegedAction<>() {
+                public Manifest run() {
+                    Path jar = Path.of(location);
+                    try (InputStream in = Files.newInputStream(jar);
+                         JarInputStream jis = new JarInputStream(in, false)) {
+                        return jis.getManifest();
+                    } catch (IOException e) {
+                        return null;
+                    }
+                }
+            });
+        }
+    }
+
+    /**
+     * Returns an array of the binary name of the packages defined by
+     * the boot loader, in VM internal form (forward slashes instead of dot).
+     */
+    private static native String[] getSystemPackageNames();
+
+    /**
+     * Returns the location of the package of the given name, if
+     * defined by the boot loader; otherwise {@code null} is returned.
+     *
+     * The location may be a module from the runtime image or exploded image,
+     * or from the boot class append path (i.e. -Xbootclasspath/a or
+     * BOOT-CLASS-PATH attribute specified in java agent).
+     */
+    private static native String getSystemPackageLocation(String name);
+    private static native void setBootLoaderUnnamedModule0(Module module);
+}
diff --git a/tests/test_data/std/jdk/internal/loader/BuiltinClassLoader$1.class b/tests/test_data/std/jdk/internal/loader/BuiltinClassLoader$1.class
new file mode 100644
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diff --git a/tests/test_data/std/jdk/internal/loader/BuiltinClassLoader$3.class b/tests/test_data/std/jdk/internal/loader/BuiltinClassLoader$3.class
new file mode 100644
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diff --git a/tests/test_data/std/jdk/internal/loader/BuiltinClassLoader$4.class b/tests/test_data/std/jdk/internal/loader/BuiltinClassLoader$4.class
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GIT binary patch
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diff --git a/tests/test_data/std/jdk/internal/loader/BuiltinClassLoader$5.class b/tests/test_data/std/jdk/internal/loader/BuiltinClassLoader$5.class
new file mode 100644
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GIT binary patch
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diff --git a/tests/test_data/std/jdk/internal/loader/BuiltinClassLoader$LoadedModule.class b/tests/test_data/std/jdk/internal/loader/BuiltinClassLoader$LoadedModule.class
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GIT binary patch
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diff --git a/tests/test_data/std/jdk/internal/loader/BuiltinClassLoader$NullModuleReader.class b/tests/test_data/std/jdk/internal/loader/BuiltinClassLoader$NullModuleReader.class
new file mode 100644
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literal 0
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diff --git a/tests/test_data/std/jdk/internal/loader/BuiltinClassLoader.class b/tests/test_data/std/jdk/internal/loader/BuiltinClassLoader.class
new file mode 100644
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GIT binary patch
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diff --git a/tests/test_data/std/jdk/internal/loader/BuiltinClassLoader.java b/tests/test_data/std/jdk/internal/loader/BuiltinClassLoader.java
new file mode 100644
index 00000000..1f7df790
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/loader/BuiltinClassLoader.java
@@ -0,0 +1,1088 @@
+/*
+ * Copyright (c) 2015, 2022, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package jdk.internal.loader;
+
+import java.io.IOException;
+import java.io.InputStream;
+import java.lang.module.ModuleDescriptor;
+import java.lang.module.ModuleReference;
+import java.lang.module.ModuleReader;
+import java.lang.ref.SoftReference;
+import java.net.MalformedURLException;
+import java.net.URI;
+import java.net.URL;
+import java.nio.ByteBuffer;
+import java.security.AccessController;
+import java.security.CodeSigner;
+import java.security.CodeSource;
+import java.security.PermissionCollection;
+import java.security.PrivilegedAction;
+import java.security.PrivilegedActionException;
+import java.security.PrivilegedExceptionAction;
+import java.security.SecureClassLoader;
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.Enumeration;
+import java.util.Iterator;
+import java.util.List;
+import java.util.Map;
+import java.util.NoSuchElementException;
+import java.util.Optional;
+import java.util.concurrent.ConcurrentHashMap;
+import java.util.function.Function;
+import java.util.jar.Attributes;
+import java.util.jar.Manifest;
+import java.util.stream.Stream;
+
+import jdk.internal.access.SharedSecrets;
+import jdk.internal.misc.VM;
+import jdk.internal.module.ModulePatcher.PatchedModuleReader;
+import jdk.internal.module.Resources;
+import jdk.internal.vm.annotation.Stable;
+import sun.security.util.LazyCodeSourcePermissionCollection;
+
+
+/**
+ * The platform or application class loader. Resources loaded from modules
+ * defined to the boot class loader are also loaded via an instance of this
+ * ClassLoader type.
+ *
+ * <p> This ClassLoader supports loading of classes and resources from modules.
+ * Modules are defined to the ClassLoader by invoking the {@link #loadModule}
+ * method. Defining a module to this ClassLoader has the effect of making the
+ * types in the module visible. </p>
+ *
+ * <p> This ClassLoader also supports loading of classes and resources from a
+ * class path of URLs that are specified to the ClassLoader at construction
+ * time. The class path may expand at runtime (the Class-Path attribute in JAR
+ * files or via instrumentation agents). </p>
+ *
+ * <p> The delegation model used by this ClassLoader differs to the regular
+ * delegation model. When requested to load a class then this ClassLoader first
+ * maps the class name to its package name. If there is a module defined to a
+ * BuiltinClassLoader containing this package then the class loader delegates
+ * directly to that class loader. If there isn't a module containing the
+ * package then it delegates the search to the parent class loader and if not
+ * found in the parent then it searches the class path. The main difference
+ * between this and the usual delegation model is that it allows the platform
+ * class loader to delegate to the application class loader, important with
+ * upgraded modules defined to the platform class loader.
+ */
+
+public class BuiltinClassLoader
+    extends SecureClassLoader
+{
+    static {
+        if (!ClassLoader.registerAsParallelCapable())
+            throw new InternalError("Unable to register as parallel capable");
+    }
+
+    // parent ClassLoader
+    private final BuiltinClassLoader parent;
+
+    // the URL class path, or null if there is no class path
+    private @Stable URLClassPath ucp;
+
+    /**
+     * A module defined/loaded by a built-in class loader.
+     *
+     * A LoadedModule encapsulates a ModuleReference along with its CodeSource
+     * URL to avoid needing to create this URL when defining classes.
+     */
+    private static class LoadedModule {
+        private final BuiltinClassLoader loader;
+        private final ModuleReference mref;
+        private final URI uri;                      // may be null
+        private @Stable URL codeSourceURL;          // may be null
+
+        LoadedModule(BuiltinClassLoader loader, ModuleReference mref) {
+            URL url = null;
+            this.uri = mref.location().orElse(null);
+
+            // for non-jrt schemes we need to resolve the codeSourceURL
+            // eagerly during bootstrap since the handler might be
+            // overridden
+            if (uri != null && !"jrt".equals(uri.getScheme())) {
+                url = createURL(uri);
+            }
+            this.loader = loader;
+            this.mref = mref;
+            this.codeSourceURL = url;
+        }
+
+        BuiltinClassLoader loader() { return loader; }
+        ModuleReference mref() { return mref; }
+        String name() { return mref.descriptor().name(); }
+
+        URL codeSourceURL() {
+            URL url = codeSourceURL;
+            if (url == null && uri != null) {
+                codeSourceURL = url = createURL(uri);
+            }
+            return url;
+        }
+
+        private URL createURL(URI uri) {
+            URL url = null;
+            try {
+                url = uri.toURL();
+            } catch (MalformedURLException | IllegalArgumentException e) {
+            }
+            return url;
+        }
+    }
+
+    // maps package name to loaded module for modules in the boot layer
+    private static final Map<String, LoadedModule> packageToModule;
+    static {
+        ArchivedClassLoaders archivedClassLoaders = ArchivedClassLoaders.get();
+        if (archivedClassLoaders != null) {
+            @SuppressWarnings("unchecked")
+            Map<String, LoadedModule> map
+                = (Map<String, LoadedModule>) archivedClassLoaders.packageToModule();
+            packageToModule = map;
+        } else {
+            packageToModule = new ConcurrentHashMap<>(1024);
+        }
+    }
+
+    /**
+     * Invoked by ArchivedClassLoaders to archive the package-to-module map.
+     */
+    static Map<String, ?> packageToModule() {
+        return packageToModule;
+    }
+
+    // maps a module name to a module reference
+    private final Map<String, ModuleReference> nameToModule;
+
+    // maps a module reference to a module reader
+    private final Map<ModuleReference, ModuleReader> moduleToReader;
+
+    // cache of resource name -> list of URLs.
+    // used only for resources that are not in module packages
+    private volatile SoftReference<Map<String, List<URL>>> resourceCache;
+
+    /**
+     * Create a new instance.
+     */
+    BuiltinClassLoader(String name, BuiltinClassLoader parent, URLClassPath ucp) {
+        // ensure getParent() returns null when the parent is the boot loader
+        super(name, parent == null || parent == ClassLoaders.bootLoader() ? null : parent);
+
+        this.parent = parent;
+        this.ucp = ucp;
+
+        this.nameToModule = new ConcurrentHashMap<>(32);
+        this.moduleToReader = new ConcurrentHashMap<>();
+    }
+
+    /**
+     * Appends to the given file path to the class path.
+     */
+    void appendClassPath(String path) {
+        // assert ucp != null;
+        ucp.addFile(path);
+    }
+
+    /**
+     * Sets the class path, called to reset the class path during -Xshare:dump
+     */
+    void setClassPath(URLClassPath ucp) {
+        this.ucp = ucp;
+    }
+
+    /**
+     * Returns {@code true} if there is a class path associated with this
+     * class loader.
+     */
+    boolean hasClassPath() {
+        return ucp != null;
+    }
+
+    /**
+     * Register a module this class loader. This has the effect of making the
+     * types in the module visible.
+     */
+    public void loadModule(ModuleReference mref) {
+        ModuleDescriptor descriptor = mref.descriptor();
+        String mn = descriptor.name();
+        if (nameToModule.putIfAbsent(mn, mref) != null) {
+            throw new InternalError(mn + " already defined to this loader");
+        }
+
+        LoadedModule loadedModule = new LoadedModule(this, mref);
+        for (String pn : descriptor.packages()) {
+            LoadedModule other = packageToModule.putIfAbsent(pn, loadedModule);
+            if (other != null) {
+                throw new InternalError(pn + " in modules " + mn + " and "
+                                        + other.name());
+            }
+        }
+
+        // clear resources cache if VM is already initialized
+        if (resourceCache != null && VM.isModuleSystemInited()) {
+            resourceCache = null;
+        }
+    }
+
+    /**
+     * Returns the {@code ModuleReference} for the named module defined to
+     * this class loader; or {@code null} if not defined.
+     *
+     * @param name The name of the module to find
+     */
+    protected ModuleReference findModule(String name) {
+        return nameToModule.get(name);
+    }
+
+
+    // -- finding resources
+
+    /**
+     * Returns a URL to a resource of the given name in a module defined to
+     * this class loader.
+     */
+    @Override
+    public URL findResource(String mn, String name) throws IOException {
+        URL url = null;
+
+        if (mn != null) {
+            // find in module
+            ModuleReference mref = nameToModule.get(mn);
+            if (mref != null) {
+                url = findResource(mref, name);
+            }
+        } else {
+            // find on class path
+            url = findResourceOnClassPath(name);
+        }
+
+        return checkURL(url);  // check access before returning
+    }
+
+    /**
+     * Returns an input stream to a resource of the given name in a module
+     * defined to this class loader.
+     */
+    @SuppressWarnings("removal")
+    public InputStream findResourceAsStream(String mn, String name)
+        throws IOException
+    {
+        // Need URL to resource when running with a security manager so that
+        // the right permission check is done.
+        if (System.getSecurityManager() != null || mn == null) {
+            URL url = findResource(mn, name);
+            return (url != null) ? url.openStream() : null;
+        }
+
+        // find in module defined to this loader, no security manager
+        ModuleReference mref = nameToModule.get(mn);
+        if (mref != null) {
+            return moduleReaderFor(mref).open(name).orElse(null);
+        } else {
+            return null;
+        }
+    }
+
+    /**
+     * Finds a resource with the given name in the modules defined to this
+     * class loader or its class path.
+     */
+    @Override
+    public URL findResource(String name) {
+        String pn = Resources.toPackageName(name);
+        LoadedModule module = packageToModule.get(pn);
+        if (module != null) {
+
+            // resource is in a package of a module defined to this loader
+            if (module.loader() == this) {
+                URL url;
+                try {
+                    url = findResource(module.name(), name); // checks URL
+                } catch (IOException ioe) {
+                    return null;
+                }
+                if (url != null
+                    && (name.endsWith(".class")
+                        || url.toString().endsWith("/")
+                        || isOpen(module.mref(), pn))) {
+                    return url;
+                }
+            }
+
+        } else {
+
+            // not in a module package but may be in module defined to this loader
+            try {
+                List<URL> urls = findMiscResource(name);
+                if (!urls.isEmpty()) {
+                    URL url = urls.get(0);
+                    if (url != null) {
+                        return checkURL(url); // check access before returning
+                    }
+                }
+            } catch (IOException ioe) {
+                return null;
+            }
+
+        }
+
+        // search class path
+        URL url = findResourceOnClassPath(name);
+        return checkURL(url);
+    }
+
+    /**
+     * Returns an enumeration of URL objects to all the resources with the
+     * given name in modules defined to this class loader or on the class
+     * path of this loader.
+     */
+    @Override
+    public Enumeration<URL> findResources(String name) throws IOException {
+        List<URL> checked = new ArrayList<>();  // list of checked URLs
+
+        String pn = Resources.toPackageName(name);
+        LoadedModule module = packageToModule.get(pn);
+        if (module != null) {
+
+            // resource is in a package of a module defined to this loader
+            if (module.loader() == this) {
+                URL url = findResource(module.name(), name); // checks URL
+                if (url != null
+                    && (name.endsWith(".class")
+                        || url.toString().endsWith("/")
+                        || isOpen(module.mref(), pn))) {
+                    checked.add(url);
+                }
+            }
+
+        } else {
+            // not in a package of a module defined to this loader
+            for (URL url : findMiscResource(name)) {
+                url = checkURL(url);
+                if (url != null) {
+                    checked.add(url);
+                }
+            }
+        }
+
+        // class path (not checked)
+        Enumeration<URL> e = findResourcesOnClassPath(name);
+
+        // concat the checked URLs and the (not checked) class path
+        return new Enumeration<>() {
+            final Iterator<URL> iterator = checked.iterator();
+            URL next;
+            private boolean hasNext() {
+                if (next != null) {
+                    return true;
+                } else if (iterator.hasNext()) {
+                    next = iterator.next();
+                    return true;
+                } else {
+                    // need to check each URL
+                    while (e.hasMoreElements() && next == null) {
+                        next = checkURL(e.nextElement());
+                    }
+                    return next != null;
+                }
+            }
+            @Override
+            public boolean hasMoreElements() {
+                return hasNext();
+            }
+            @Override
+            public URL nextElement() {
+                if (hasNext()) {
+                    URL result = next;
+                    next = null;
+                    return result;
+                } else {
+                    throw new NoSuchElementException();
+                }
+            }
+        };
+
+    }
+
+    /**
+     * Returns the list of URLs to a "miscellaneous" resource in modules
+     * defined to this loader. A miscellaneous resource is not in a module
+     * package, e.g. META-INF/services/p.S.
+     *
+     * The cache used by this method avoids repeated searching of all modules.
+     */
+    @SuppressWarnings("removal")
+    private List<URL> findMiscResource(String name) throws IOException {
+        SoftReference<Map<String, List<URL>>> ref = this.resourceCache;
+        Map<String, List<URL>> map = (ref != null) ? ref.get() : null;
+        if (map == null) {
+            // only cache resources after VM is fully initialized
+            if (VM.isModuleSystemInited()) {
+                map = new ConcurrentHashMap<>();
+                this.resourceCache = new SoftReference<>(map);
+            }
+        } else {
+            List<URL> urls = map.get(name);
+            if (urls != null)
+                return urls;
+        }
+
+        // search all modules for the resource
+        List<URL> urls;
+        try {
+            urls = AccessController.doPrivileged(
+                new PrivilegedExceptionAction<>() {
+                    @Override
+                    public List<URL> run() throws IOException {
+                        List<URL> result = null;
+                        for (ModuleReference mref : nameToModule.values()) {
+                            URI u = moduleReaderFor(mref).find(name).orElse(null);
+                            if (u != null) {
+                                try {
+                                    if (result == null)
+                                        result = new ArrayList<>();
+                                    result.add(u.toURL());
+                                } catch (MalformedURLException |
+                                         IllegalArgumentException e) {
+                                }
+                            }
+                        }
+                        return (result != null) ? result : Collections.emptyList();
+                    }
+                });
+        } catch (PrivilegedActionException pae) {
+            throw (IOException) pae.getCause();
+        }
+
+        // only cache resources after VM is fully initialized
+        if (map != null) {
+            map.putIfAbsent(name, urls);
+        }
+
+        return urls;
+    }
+
+    /**
+     * Returns the URL to a resource in a module or {@code null} if not found.
+     */
+    @SuppressWarnings("removal")
+    private URL findResource(ModuleReference mref, String name) throws IOException {
+        URI u;
+        if (System.getSecurityManager() == null) {
+            u = moduleReaderFor(mref).find(name).orElse(null);
+        } else {
+            try {
+                u = AccessController.doPrivileged(new PrivilegedExceptionAction<> () {
+                    @Override
+                    public URI run() throws IOException {
+                        return moduleReaderFor(mref).find(name).orElse(null);
+                    }
+                });
+            } catch (PrivilegedActionException pae) {
+                throw (IOException) pae.getCause();
+            }
+        }
+        if (u != null) {
+            try {
+                return u.toURL();
+            } catch (MalformedURLException | IllegalArgumentException e) { }
+        }
+        return null;
+    }
+
+    /**
+     * Returns the URL to a resource in a module. Returns {@code null} if not found
+     * or an I/O error occurs.
+     */
+    private URL findResourceOrNull(ModuleReference mref, String name) {
+        try {
+            return findResource(mref, name);
+        } catch (IOException ignore) {
+            return null;
+        }
+    }
+
+    /**
+     * Returns a URL to a resource on the class path.
+     */
+    @SuppressWarnings("removal")
+    private URL findResourceOnClassPath(String name) {
+        if (hasClassPath()) {
+            if (System.getSecurityManager() == null) {
+                return ucp.findResource(name, false);
+            } else {
+                PrivilegedAction<URL> pa = () -> ucp.findResource(name, false);
+                return AccessController.doPrivileged(pa);
+            }
+        } else {
+            // no class path
+            return null;
+        }
+    }
+
+    /**
+     * Returns the URLs of all resources of the given name on the class path.
+     */
+    @SuppressWarnings("removal")
+    private Enumeration<URL> findResourcesOnClassPath(String name) {
+        if (hasClassPath()) {
+            if (System.getSecurityManager() == null) {
+                return ucp.findResources(name, false);
+            } else {
+                PrivilegedAction<Enumeration<URL>> pa;
+                pa = () -> ucp.findResources(name, false);
+                return AccessController.doPrivileged(pa);
+            }
+        } else {
+            // no class path
+            return Collections.emptyEnumeration();
+        }
+    }
+
+    // -- finding/loading classes
+
+    /**
+     * Finds the class with the specified binary name.
+     */
+    @Override
+    protected Class<?> findClass(String cn) throws ClassNotFoundException {
+        // no class loading until VM is fully initialized
+        if (!VM.isModuleSystemInited())
+            throw new ClassNotFoundException(cn);
+
+        // find the candidate module for this class
+        LoadedModule loadedModule = findLoadedModule(cn);
+
+        Class<?> c = null;
+        if (loadedModule != null) {
+
+            // attempt to load class in module defined to this loader
+            if (loadedModule.loader() == this) {
+                c = findClassInModuleOrNull(loadedModule, cn);
+            }
+
+        } else {
+
+            // search class path
+            if (hasClassPath()) {
+                c = findClassOnClassPathOrNull(cn);
+            }
+
+        }
+
+        // not found
+        if (c == null)
+            throw new ClassNotFoundException(cn);
+
+        return c;
+    }
+
+    /**
+     * Finds the class with the specified binary name in a module.
+     * This method returns {@code null} if the class cannot be found
+     * or not defined in the specified module.
+     */
+    @Override
+    protected Class<?> findClass(String mn, String cn) {
+        if (mn != null) {
+            // find the candidate module for this class
+            LoadedModule loadedModule = findLoadedModule(mn, cn);
+            if (loadedModule == null) {
+                return null;
+            }
+
+            // attempt to load class in module defined to this loader
+            assert loadedModule.loader() == this;
+            return findClassInModuleOrNull(loadedModule, cn);
+        }
+
+        // search class path
+        if (hasClassPath()) {
+            return findClassOnClassPathOrNull(cn);
+        }
+
+        return null;
+    }
+
+    /**
+     * Loads the class with the specified binary name.
+     */
+    @Override
+    protected Class<?> loadClass(String cn, boolean resolve)
+        throws ClassNotFoundException
+    {
+        Class<?> c = loadClassOrNull(cn, resolve);
+        if (c == null)
+            throw new ClassNotFoundException(cn);
+        return c;
+    }
+
+    /**
+     * A variation of {@code loadClass} to load a class with the specified
+     * binary name. This method returns {@code null} when the class is not
+     * found.
+     */
+    protected Class<?> loadClassOrNull(String cn, boolean resolve) {
+        synchronized (getClassLoadingLock(cn)) {
+            // check if already loaded
+            Class<?> c = findLoadedClass(cn);
+
+            if (c == null) {
+
+                // find the candidate module for this class
+                LoadedModule loadedModule = findLoadedModule(cn);
+                if (loadedModule != null) {
+
+                    // package is in a module
+                    BuiltinClassLoader loader = loadedModule.loader();
+                    if (loader == this) {
+                        if (VM.isModuleSystemInited()) {
+                            c = findClassInModuleOrNull(loadedModule, cn);
+                        }
+                    } else {
+                        // delegate to the other loader
+                        c = loader.loadClassOrNull(cn);
+                    }
+
+                } else {
+
+                    // check parent
+                    if (parent != null) {
+                        c = parent.loadClassOrNull(cn);
+                    }
+
+                    // check class path
+                    if (c == null && hasClassPath() && VM.isModuleSystemInited()) {
+                        c = findClassOnClassPathOrNull(cn);
+                    }
+                }
+
+            }
+
+            if (resolve && c != null)
+                resolveClass(c);
+
+            return c;
+        }
+    }
+
+    /**
+     * A variation of {@code loadClass} to load a class with the specified
+     * binary name. This method returns {@code null} when the class is not
+     * found.
+     */
+    protected final Class<?> loadClassOrNull(String cn) {
+        return loadClassOrNull(cn, false);
+    }
+
+    /**
+     * Finds the candidate loaded module for the given class name.
+     * Returns {@code null} if none of the modules defined to this
+     * class loader contain the API package for the class.
+     */
+    private LoadedModule findLoadedModule(String cn) {
+        int pos = cn.lastIndexOf('.');
+        if (pos < 0)
+            return null; // unnamed package
+
+        String pn = cn.substring(0, pos);
+        return packageToModule.get(pn);
+    }
+
+    /**
+     * Finds the candidate loaded module for the given class name
+     * in the named module.  Returns {@code null} if the named module
+     * is not defined to this class loader or does not contain
+     * the API package for the class.
+     */
+    private LoadedModule findLoadedModule(String mn, String cn) {
+        LoadedModule loadedModule = findLoadedModule(cn);
+        if (loadedModule != null && mn.equals(loadedModule.name())) {
+            return loadedModule;
+        } else {
+            return null;
+        }
+    }
+
+    /**
+     * Finds the class with the specified binary name if in a module
+     * defined to this ClassLoader.
+     *
+     * @return the resulting Class or {@code null} if not found
+     */
+    @SuppressWarnings("removal")
+    private Class<?> findClassInModuleOrNull(LoadedModule loadedModule, String cn) {
+        if (System.getSecurityManager() == null) {
+            return defineClass(cn, loadedModule);
+        } else {
+            PrivilegedAction<Class<?>> pa = () -> defineClass(cn, loadedModule);
+            return AccessController.doPrivileged(pa);
+        }
+    }
+
+    /**
+     * Finds the class with the specified binary name on the class path.
+     *
+     * @return the resulting Class or {@code null} if not found
+     */
+    @SuppressWarnings("removal")
+    private Class<?> findClassOnClassPathOrNull(String cn) {
+        String path = cn.replace('.', '/').concat(".class");
+        if (System.getSecurityManager() == null) {
+            Resource res = ucp.getResource(path, false);
+            if (res != null) {
+                try {
+                    return defineClass(cn, res);
+                } catch (IOException ioe) {
+                    // TBD on how I/O errors should be propagated
+                }
+            }
+            return null;
+        } else {
+            // avoid use of lambda here
+            PrivilegedAction<Class<?>> pa = new PrivilegedAction<>() {
+                public Class<?> run() {
+                    Resource res = ucp.getResource(path, false);
+                    if (res != null) {
+                        try {
+                            return defineClass(cn, res);
+                        } catch (IOException ioe) {
+                            // TBD on how I/O errors should be propagated
+                        }
+                    }
+                    return null;
+                }
+            };
+            return AccessController.doPrivileged(pa);
+        }
+    }
+
+    /**
+     * Defines the given binary class name to the VM, loading the class
+     * bytes from the given module.
+     *
+     * @return the resulting Class or {@code null} if an I/O error occurs
+     */
+    private Class<?> defineClass(String cn, LoadedModule loadedModule) {
+        ModuleReference mref = loadedModule.mref();
+        ModuleReader reader = moduleReaderFor(mref);
+
+        try {
+            ByteBuffer bb = null;
+            URL csURL = null;
+
+            // locate class file, special handling for patched modules to
+            // avoid locating the resource twice
+            String rn = cn.replace('.', '/').concat(".class");
+            if (reader instanceof PatchedModuleReader) {
+                Resource r = ((PatchedModuleReader)reader).findResource(rn);
+                if (r != null) {
+                    bb = r.getByteBuffer();
+                    csURL = r.getCodeSourceURL();
+                }
+            } else {
+                bb = reader.read(rn).orElse(null);
+                csURL = loadedModule.codeSourceURL();
+            }
+
+            if (bb == null) {
+                // class not found
+                return null;
+            }
+
+            CodeSource cs = new CodeSource(csURL, (CodeSigner[]) null);
+            try {
+                // define class to VM
+                return defineClass(cn, bb, cs);
+
+            } finally {
+                reader.release(bb);
+            }
+
+        } catch (IOException ioe) {
+            // TBD on how I/O errors should be propagated
+            return null;
+        }
+    }
+
+    /**
+     * Defines the given binary class name to the VM, loading the class
+     * bytes via the given Resource object.
+     *
+     * @return the resulting Class
+     * @throws IOException if reading the resource fails
+     * @throws SecurityException if there is a sealing violation (JAR spec)
+     */
+    private Class<?> defineClass(String cn, Resource res) throws IOException {
+        URL url = res.getCodeSourceURL();
+
+        // if class is in a named package then ensure that the package is defined
+        int pos = cn.lastIndexOf('.');
+        if (pos != -1) {
+            String pn = cn.substring(0, pos);
+            Manifest man = res.getManifest();
+            defineOrCheckPackage(pn, man, url);
+        }
+
+        // defines the class to the runtime
+        ByteBuffer bb = res.getByteBuffer();
+        if (bb != null) {
+            CodeSigner[] signers = res.getCodeSigners();
+            CodeSource cs = new CodeSource(url, signers);
+            return defineClass(cn, bb, cs);
+        } else {
+            byte[] b = res.getBytes();
+            CodeSigner[] signers = res.getCodeSigners();
+            CodeSource cs = new CodeSource(url, signers);
+            return defineClass(cn, b, 0, b.length, cs);
+        }
+    }
+
+
+    // -- packages
+
+    /**
+     * Defines a package in this ClassLoader. If the package is already defined
+     * then its sealing needs to be checked if sealed by the legacy sealing
+     * mechanism.
+     *
+     * @throws SecurityException if there is a sealing violation (JAR spec)
+     */
+    protected Package defineOrCheckPackage(String pn, Manifest man, URL url) {
+        Package pkg = getAndVerifyPackage(pn, man, url);
+        if (pkg == null) {
+            try {
+                if (man != null) {
+                    pkg = definePackage(pn, man, url);
+                } else {
+                    pkg = definePackage(pn, null, null, null, null, null, null, null);
+                }
+            } catch (IllegalArgumentException iae) {
+                // defined by another thread so need to re-verify
+                pkg = getAndVerifyPackage(pn, man, url);
+                if (pkg == null)
+                    throw new InternalError("Cannot find package: " + pn);
+            }
+        }
+        return pkg;
+    }
+
+    /**
+     * Gets the Package with the specified package name. If defined
+     * then verifies it against the manifest and code source.
+     *
+     * @throws SecurityException if there is a sealing violation (JAR spec)
+     */
+    private Package getAndVerifyPackage(String pn, Manifest man, URL url) {
+        Package pkg = getDefinedPackage(pn);
+        if (pkg != null) {
+            if (pkg.isSealed()) {
+                if (!pkg.isSealed(url)) {
+                    throw new SecurityException(
+                        "sealing violation: package " + pn + " is sealed");
+                }
+            } else {
+                // can't seal package if already defined without sealing
+                if ((man != null) && isSealed(pn, man)) {
+                    throw new SecurityException(
+                        "sealing violation: can't seal package " + pn +
+                        ": already defined");
+                }
+            }
+        }
+        return pkg;
+    }
+
+    /**
+     * Defines a new package in this ClassLoader. The attributes in the specified
+     * Manifest are used to get the package version and sealing information.
+     *
+     * @throws IllegalArgumentException if the package name duplicates an
+     *      existing package either in this class loader or one of its ancestors
+     * @throws SecurityException if the package name is untrusted in the manifest
+     */
+    private Package definePackage(String pn, Manifest man, URL url) {
+        String specTitle = null;
+        String specVersion = null;
+        String specVendor = null;
+        String implTitle = null;
+        String implVersion = null;
+        String implVendor = null;
+        String sealed = null;
+        URL sealBase = null;
+
+        if (man != null) {
+            Attributes attr = SharedSecrets.javaUtilJarAccess()
+                    .getTrustedAttributes(man, pn.replace('.', '/').concat("/"));
+            if (attr != null) {
+                specTitle = attr.getValue(Attributes.Name.SPECIFICATION_TITLE);
+                specVersion = attr.getValue(Attributes.Name.SPECIFICATION_VERSION);
+                specVendor = attr.getValue(Attributes.Name.SPECIFICATION_VENDOR);
+                implTitle = attr.getValue(Attributes.Name.IMPLEMENTATION_TITLE);
+                implVersion = attr.getValue(Attributes.Name.IMPLEMENTATION_VERSION);
+                implVendor = attr.getValue(Attributes.Name.IMPLEMENTATION_VENDOR);
+                sealed = attr.getValue(Attributes.Name.SEALED);
+            }
+
+            attr = man.getMainAttributes();
+            if (attr != null) {
+                if (specTitle == null)
+                    specTitle = attr.getValue(Attributes.Name.SPECIFICATION_TITLE);
+                if (specVersion == null)
+                    specVersion = attr.getValue(Attributes.Name.SPECIFICATION_VERSION);
+                if (specVendor == null)
+                    specVendor = attr.getValue(Attributes.Name.SPECIFICATION_VENDOR);
+                if (implTitle == null)
+                    implTitle = attr.getValue(Attributes.Name.IMPLEMENTATION_TITLE);
+                if (implVersion == null)
+                    implVersion = attr.getValue(Attributes.Name.IMPLEMENTATION_VERSION);
+                if (implVendor == null)
+                    implVendor = attr.getValue(Attributes.Name.IMPLEMENTATION_VENDOR);
+                if (sealed == null)
+                    sealed = attr.getValue(Attributes.Name.SEALED);
+            }
+
+            // package is sealed
+            if ("true".equalsIgnoreCase(sealed))
+                sealBase = url;
+        }
+        return definePackage(pn,
+                specTitle,
+                specVersion,
+                specVendor,
+                implTitle,
+                implVersion,
+                implVendor,
+                sealBase);
+    }
+
+    /**
+     * Returns {@code true} if the specified package name is sealed according to
+     * the given manifest.
+     *
+     * @throws SecurityException if the package name is untrusted in the manifest
+     */
+    private boolean isSealed(String pn, Manifest man) {
+        Attributes attr = SharedSecrets.javaUtilJarAccess()
+                .getTrustedAttributes(man, pn.replace('.', '/').concat("/"));
+        String sealed = null;
+        if (attr != null)
+            sealed = attr.getValue(Attributes.Name.SEALED);
+        if (sealed == null && (attr = man.getMainAttributes()) != null)
+            sealed = attr.getValue(Attributes.Name.SEALED);
+        return "true".equalsIgnoreCase(sealed);
+    }
+
+    // -- permissions
+
+    /**
+     * Returns the permissions for the given CodeSource.
+     */
+    @Override
+    protected PermissionCollection getPermissions(CodeSource cs) {
+        return new LazyCodeSourcePermissionCollection(super.getPermissions(cs), cs);
+    }
+
+    // -- miscellaneous supporting methods
+
+    /**
+     * Returns the ModuleReader for the given module, creating it if needed.
+     */
+    private ModuleReader moduleReaderFor(ModuleReference mref) {
+        ModuleReader reader = moduleToReader.get(mref);
+        if (reader == null) {
+            // avoid method reference during startup
+            Function<ModuleReference, ModuleReader> create = new Function<>() {
+                public ModuleReader apply(ModuleReference moduleReference) {
+                    try {
+                        return mref.open();
+                    } catch (IOException e) {
+                        // Return a null module reader to avoid a future class
+                        // load attempting to open the module again.
+                        return new NullModuleReader();
+                    }
+                }
+            };
+            reader = moduleToReader.computeIfAbsent(mref, create);
+        }
+        return reader;
+    }
+
+    /**
+     * A ModuleReader that doesn't read any resources.
+     */
+    private static class NullModuleReader implements ModuleReader {
+        @Override
+        public Optional<URI> find(String name) {
+            return Optional.empty();
+        }
+        @Override
+        public Stream<String> list() {
+            return Stream.empty();
+        }
+        @Override
+        public void close() {
+            throw new InternalError("Should not get here");
+        }
+    };
+
+    /**
+     * Returns true if the given module opens the given package
+     * unconditionally.
+     *
+     * @implNote This method currently iterates over each of the open
+     * packages. This will be replaced once the ModuleDescriptor.Opens
+     * API is updated.
+     */
+    private boolean isOpen(ModuleReference mref, String pn) {
+        ModuleDescriptor descriptor = mref.descriptor();
+        if (descriptor.isOpen() || descriptor.isAutomatic())
+            return true;
+        for (ModuleDescriptor.Opens opens : descriptor.opens()) {
+            String source = opens.source();
+            if (!opens.isQualified() && source.equals(pn)) {
+                return true;
+            }
+        }
+        return false;
+    }
+
+    /**
+     * Checks access to the given URL. We use URLClassPath for consistent
+     * checking with java.net.URLClassLoader.
+     */
+    private static URL checkURL(URL url) {
+        return URLClassPath.checkURL(url);
+    }
+
+    // Called from VM only, during -Xshare:dump
+    private void resetArchivedStates() {
+        ucp = null;
+        resourceCache = null;
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/loader/ClassLoaderHelper.class b/tests/test_data/std/jdk/internal/loader/ClassLoaderHelper.class
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diff --git a/tests/test_data/std/jdk/internal/loader/ClassLoaderHelper.java b/tests/test_data/std/jdk/internal/loader/ClassLoaderHelper.java
new file mode 100644
index 00000000..a780146f
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/loader/ClassLoaderHelper.java
@@ -0,0 +1,90 @@
+/*
+ * Copyright (c) 2012, 2023, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package jdk.internal.loader;
+
+import java.io.File;
+import java.util.ArrayList;
+
+import jdk.internal.util.OSVersion;
+
+class ClassLoaderHelper {
+
+    // SDK 10.15 and earlier always reports 10.16 instead of 11.x.x
+    private static final boolean hasDynamicLoaderCache = OSVersion.current()
+            .compareTo(new OSVersion(10, 16)) >= 0;
+
+    private ClassLoaderHelper() {}
+
+    /**
+     * Returns true if loading a native library only if
+     * it's present on the file system.
+     *
+     * @implNote
+     * On macOS 11.x or later which supports dynamic linker cache,
+     * the dynamic library is not present on the filesystem.  The
+     * library cannot determine if a dynamic library exists on a
+     * given path or not and so this method returns false.
+     */
+    static boolean loadLibraryOnlyIfPresent() {
+        return !hasDynamicLoaderCache;
+    }
+
+    /**
+     * Returns an alternate path name for the given file
+     * such that if the original pathname did not exist, then the
+     * file may be located at the alternate location.
+     * For mac, this replaces the final .dylib suffix with .jnilib
+     */
+    static File mapAlternativeName(File lib) {
+        String name = lib.toString();
+        int index = name.lastIndexOf('.');
+        if (index < 0) {
+            return null;
+        }
+        return new File(name.substring(0, index) + ".jnilib");
+    }
+
+    /**
+     * Parse a PATH env variable.
+     *
+     * Empty elements will be replaced by dot.
+     */
+    static String[] parsePath(String ldPath) {
+        char ps = File.pathSeparatorChar;
+        ArrayList<String> paths = new ArrayList<>();
+        int pathStart = 0;
+        int pathEnd;
+        while ((pathEnd = ldPath.indexOf(ps, pathStart)) >= 0) {
+            paths.add((pathStart < pathEnd) ?
+                    ldPath.substring(pathStart, pathEnd) : ".");
+            pathStart = pathEnd + 1;
+        }
+        int ldLen = ldPath.length();
+        paths.add((pathStart < ldLen) ?
+                ldPath.substring(pathStart, ldLen) : ".");
+        return paths.toArray(new String[paths.size()]);
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/loader/ClassLoaderValue.class b/tests/test_data/std/jdk/internal/loader/ClassLoaderValue.class
new file mode 100644
index 0000000000000000000000000000000000000000..4d566fa0b47307b155c91381614e247102274720
GIT binary patch
literal 1373
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/loader/ClassLoaderValue.java b/tests/test_data/std/jdk/internal/loader/ClassLoaderValue.java
new file mode 100644
index 00000000..f4b2d2a3
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/loader/ClassLoaderValue.java
@@ -0,0 +1,102 @@
+/*
+ * Copyright (c) 2016, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package jdk.internal.loader;
+
+import java.util.Objects;
+import java.util.function.BiFunction;
+
+/**
+ * root-ClassLoaderValue. Each instance defines a separate namespace for
+ * associated values.
+ * <p>
+ * ClassLoaderValue allows associating a
+ * {@link #computeIfAbsent(ClassLoader, BiFunction) computed} non-null value with
+ * a {@code (ClassLoader, keys...)} tuple. The associated value, as well as the
+ * keys are strongly reachable from the associated ClassLoader so care should be
+ * taken to use such keys and values that only reference types resolvable from
+ * the associated ClassLoader. Failing that, ClassLoader leaks are inevitable.
+ * <p>
+ * Example usage:
+ * <pre>{@code
+ * // create a root instance which represents a namespace and declares the type of
+ * // associated values (Class instances in this example)
+ * static final ClassLoaderValue<Class<?>> proxyClasses = new ClassLoaderValue<>();
+ *
+ * // create a compound key composed of a Module and a list of interfaces
+ * Module module = ...;
+ * List<Class<?>> interfaces = ...;
+ * ClassLoaderValue<Class<?>>.Sub<Module>.Sub<List<Class<?>>> key =
+ *     proxyClasses.sub(module).sub(interfaces);
+ *
+ * // use the compound key together with ClassLoader to lazily associate
+ * // the value with tuple (loader, module, interfaces) and return it
+ * ClassLoader loader = ...;
+ * Class<?> proxyClass = key.computeIfAbsent(loader, (ld, ky) -> {
+ *     List<Class<?>> intfcs = ky.key();
+ *     Module m = ky.parent().key();
+ *     Class<?> clazz = defineProxyClass(ld, m, intfcs);
+ *     return clazz;
+ * });
+ * }</pre>
+ * <p>
+ * {@code classLoaderValue.<operation>(classLoader, ...)} represents an operation
+ * to {@link #get}, {@link #putIfAbsent}, {@link #computeIfAbsent} or {@link #remove}
+ * a value associated with a (classLoader, classLoaderValue) tuple. ClassLoader
+ * instances and root-{@link ClassLoaderValue} instances are compared using
+ * identity equality while {@link Sub sub}-ClassLoaderValue instances define
+ * {@link #equals(Object) equality} in terms of equality of its
+ * {@link Sub#parent() parent} ClassLoaderValue and its
+ * {@link #key() key} component.
+ *
+ * @param <V> the type of value(s) associated with the root-ClassLoaderValue and
+ *            all its {@link #sub(Object) descendants}.
+ * @author Peter Levart
+ * @since 9
+ */
+public final class ClassLoaderValue<V>
+    extends AbstractClassLoaderValue<ClassLoaderValue<V>, V> {
+
+    /**
+     * Constructs new root-ClassLoaderValue representing its own namespace.
+     */
+    public ClassLoaderValue() {}
+
+    /**
+     * @return the key component of this root-ClassLoaderValue (itself).
+     */
+    @Override
+    public ClassLoaderValue<V> key() {
+        return this;
+    }
+
+    /**
+     * root-ClassLoaderValue can only be equal to itself and has no predecessors.
+     */
+    @Override
+    public boolean isEqualOrDescendantOf(AbstractClassLoaderValue<?, V> clv) {
+        return equals(Objects.requireNonNull(clv));
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/loader/ClassLoaders$AppClassLoader.class b/tests/test_data/std/jdk/internal/loader/ClassLoaders$AppClassLoader.class
new file mode 100644
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diff --git a/tests/test_data/std/jdk/internal/loader/ClassLoaders$BootClassLoader.class b/tests/test_data/std/jdk/internal/loader/ClassLoaders$BootClassLoader.class
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HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/loader/ClassLoaders.java b/tests/test_data/std/jdk/internal/loader/ClassLoaders.java
new file mode 100644
index 00000000..7b0f4d13
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/loader/ClassLoaders.java
@@ -0,0 +1,239 @@
+/*
+ * Copyright (c) 2015, 2021, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package jdk.internal.loader;
+
+import java.io.IOException;
+import java.net.URL;
+import java.nio.file.InvalidPathException;
+import java.nio.file.Path;
+import java.security.CodeSource;
+import java.security.PermissionCollection;
+import java.util.jar.Manifest;
+
+import jdk.internal.access.JavaLangAccess;
+import jdk.internal.access.SharedSecrets;
+import jdk.internal.misc.VM;
+import jdk.internal.module.ServicesCatalog;
+
+/**
+ * Creates and provides access to the built-in platform and application class
+ * loaders. It also creates the class loader that is used to locate resources
+ * in modules defined to the boot class loader.
+ */
+
+public class ClassLoaders {
+
+    private ClassLoaders() { }
+
+    private static final JavaLangAccess JLA = SharedSecrets.getJavaLangAccess();
+
+    // the built-in class loaders
+    private static final BootClassLoader BOOT_LOADER;
+    private static final PlatformClassLoader PLATFORM_LOADER;
+    private static final AppClassLoader APP_LOADER;
+
+    // Sets the ServicesCatalog for the specified loader using archived objects.
+    private static void setArchivedServicesCatalog(ClassLoader loader) {
+        ServicesCatalog catalog = ArchivedClassLoaders.get().servicesCatalog(loader);
+        ServicesCatalog.putServicesCatalog(loader, catalog);
+    }
+
+    // Creates the built-in class loaders.
+    static {
+        ArchivedClassLoaders archivedClassLoaders = ArchivedClassLoaders.get();
+        // -Xbootclasspath/a or -javaagent with Boot-Class-Path attribute
+        String append = VM.getSavedProperty("jdk.boot.class.path.append");
+        URLClassPath bootUcp = (append != null && !append.isEmpty())
+                ? new URLClassPath(append, true)
+                : null;
+        if (archivedClassLoaders != null) {
+            BOOT_LOADER = (BootClassLoader) archivedClassLoaders.bootLoader();
+            BOOT_LOADER.setClassPath(bootUcp);
+            setArchivedServicesCatalog(BOOT_LOADER);
+            PLATFORM_LOADER = (PlatformClassLoader) archivedClassLoaders.platformLoader();
+            setArchivedServicesCatalog(PLATFORM_LOADER);
+        } else {
+            BOOT_LOADER = new BootClassLoader(bootUcp);
+            PLATFORM_LOADER = new PlatformClassLoader(BOOT_LOADER);
+        }
+        // A class path is required when no initial module is specified.
+        // In this case the class path defaults to "", meaning the current
+        // working directory.  When an initial module is specified, on the
+        // contrary, we drop this historic interpretation of the empty
+        // string and instead treat it as unspecified.
+        String cp = System.getProperty("java.class.path");
+        if (cp == null || cp.isEmpty()) {
+            String initialModuleName = System.getProperty("jdk.module.main");
+            cp = (initialModuleName == null) ? "" : null;
+        }
+        URLClassPath ucp = new URLClassPath(cp, false);
+        if (archivedClassLoaders != null) {
+            APP_LOADER = (AppClassLoader) archivedClassLoaders.appLoader();
+            setArchivedServicesCatalog(APP_LOADER);
+            APP_LOADER.setClassPath(ucp);
+        } else {
+            APP_LOADER = new AppClassLoader(PLATFORM_LOADER, ucp);
+            ArchivedClassLoaders.archive();
+        }
+    }
+
+    /**
+     * Returns the class loader that is used to find resources in modules
+     * defined to the boot class loader.
+     *
+     * @apiNote This method is not public, it should instead be used via
+     * the BootLoader class that provides a restricted API to this class
+     * loader.
+     */
+    static BuiltinClassLoader bootLoader() {
+        return BOOT_LOADER;
+    }
+
+    /**
+     * Returns the platform class loader.
+     */
+    public static ClassLoader platformClassLoader() {
+        return PLATFORM_LOADER;
+    }
+
+    /**
+     * Returns the application class loader.
+     */
+    public static ClassLoader appClassLoader() {
+        return APP_LOADER;
+    }
+
+    /**
+     * The class loader that is used to find resources in modules defined to
+     * the boot class loader. It is not used for class loading.
+     */
+    private static class BootClassLoader extends BuiltinClassLoader {
+        BootClassLoader(URLClassPath bcp) {
+            super(null, null, bcp);
+        }
+
+        @Override
+        protected Class<?> loadClassOrNull(String cn, boolean resolve) {
+            return JLA.findBootstrapClassOrNull(cn);
+        }
+    };
+
+    /**
+     * The platform class loader, a unique type to make it easier to distinguish
+     * from the application class loader.
+     */
+    private static class PlatformClassLoader extends BuiltinClassLoader {
+        static {
+            if (!ClassLoader.registerAsParallelCapable())
+                throw new InternalError();
+        }
+
+        PlatformClassLoader(BootClassLoader parent) {
+            super("platform", parent, null);
+        }
+    }
+
+    /**
+     * The application class loader that is a {@code BuiltinClassLoader} with
+     * customizations to be compatible with long standing behavior.
+     */
+    private static class AppClassLoader extends BuiltinClassLoader {
+        static {
+            if (!ClassLoader.registerAsParallelCapable())
+                throw new InternalError();
+        }
+
+        AppClassLoader(BuiltinClassLoader parent, URLClassPath ucp) {
+            super("app", parent, ucp);
+        }
+
+        @Override
+        protected Class<?> loadClass(String cn, boolean resolve)
+            throws ClassNotFoundException
+        {
+            // for compatibility reasons, say where restricted package list has
+            // been updated to list API packages in the unnamed module.
+            @SuppressWarnings("removal")
+            SecurityManager sm = System.getSecurityManager();
+            if (sm != null) {
+                int i = cn.lastIndexOf('.');
+                if (i != -1) {
+                    sm.checkPackageAccess(cn.substring(0, i));
+                }
+            }
+
+            return super.loadClass(cn, resolve);
+        }
+
+        @Override
+        protected PermissionCollection getPermissions(CodeSource cs) {
+            PermissionCollection perms = super.getPermissions(cs);
+            perms.add(new RuntimePermission("exitVM"));
+            return perms;
+        }
+
+        /**
+         * Called by the VM to support dynamic additions to the class path
+         *
+         * @see java.lang.instrument.Instrumentation#appendToSystemClassLoaderSearch
+         */
+        void appendToClassPathForInstrumentation(String path) {
+            appendClassPath(path);
+        }
+
+        /**
+         * Called by the VM to support define package for AppCDS
+         */
+        protected Package defineOrCheckPackage(String pn, Manifest man, URL url) {
+            return super.defineOrCheckPackage(pn, man, url);
+        }
+
+        /**
+         * Called by the VM, during -Xshare:dump
+         */
+        private void resetArchivedStates() {
+            setClassPath(null);
+        }
+    }
+
+    /**
+     * Attempts to convert the given string to a file URL.
+     *
+     * @apiNote This is called by the VM
+     */
+    @Deprecated
+    private static URL toFileURL(String s) {
+        try {
+            // Use an intermediate File object to construct a URI/URL without
+            // authority component as URLClassPath can't handle URLs with a UNC
+            // server name in the authority component.
+            return Path.of(s).toRealPath().toFile().toURI().toURL();
+        } catch (InvalidPathException | IOException ignore) {
+            // malformed path string or class path element does not exist
+            return null;
+        }
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/loader/FileURLMapper.class b/tests/test_data/std/jdk/internal/loader/FileURLMapper.class
new file mode 100644
index 0000000000000000000000000000000000000000..7610faf6febfe3464c8f42228f65c6a8bb69d472
GIT binary patch
literal 1161
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/loader/FileURLMapper.java b/tests/test_data/std/jdk/internal/loader/FileURLMapper.java
new file mode 100644
index 00000000..6507b296
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/loader/FileURLMapper.java
@@ -0,0 +1,81 @@
+/*
+ * Copyright (c) 2002, 2003, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package jdk.internal.loader;
+
+import java.net.URL;
+import java.io.File;
+import sun.net.www.ParseUtil;
+
+/**
+ * (Solaris) platform specific handling for file: URLs .
+ * urls must not contain a hostname in the authority field
+ * other than "localhost".
+ *
+ * This implementation could be updated to map such URLs
+ * on to /net/host/...
+ *
+ * @author      Michael McMahon
+ */
+
+public class FileURLMapper {
+
+    URL url;
+    String path;
+
+    public FileURLMapper (URL url) {
+        this.url = url;
+    }
+
+    /**
+     * @return the platform specific path corresponding to the URL
+     *  so long as the URL does not contain a hostname in the authority field.
+     */
+
+    public String getPath () {
+        if (path != null) {
+            return path;
+        }
+        String host = url.getHost();
+        if (host == null || host.isEmpty() || "localhost".equalsIgnoreCase(host)) {
+            path = url.getFile();
+            path = ParseUtil.decode(path);
+        }
+        return path;
+    }
+
+    /**
+     * Checks whether the file identified by the URL exists.
+     */
+    public boolean exists () {
+        String s = getPath ();
+        if (s == null) {
+            return false;
+        } else {
+            File f = new File (s);
+            return f.exists();
+        }
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/loader/Loader$1.class b/tests/test_data/std/jdk/internal/loader/Loader$1.class
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literal 0
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diff --git a/tests/test_data/std/jdk/internal/loader/Loader$2.class b/tests/test_data/std/jdk/internal/loader/Loader$2.class
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diff --git a/tests/test_data/std/jdk/internal/loader/Loader$3.class b/tests/test_data/std/jdk/internal/loader/Loader$3.class
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diff --git a/tests/test_data/std/jdk/internal/loader/Loader$LoadedModule.class b/tests/test_data/std/jdk/internal/loader/Loader$LoadedModule.class
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diff --git a/tests/test_data/std/jdk/internal/loader/Loader$NullModuleReader.class b/tests/test_data/std/jdk/internal/loader/Loader$NullModuleReader.class
new file mode 100644
index 0000000000000000000000000000000000000000..07d3ba9056044bc432be50225fd66ee8244fa7bc
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diff --git a/tests/test_data/std/jdk/internal/loader/Loader.class b/tests/test_data/std/jdk/internal/loader/Loader.class
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diff --git a/tests/test_data/std/jdk/internal/loader/Loader.java b/tests/test_data/std/jdk/internal/loader/Loader.java
new file mode 100644
index 00000000..fbd16467
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/loader/Loader.java
@@ -0,0 +1,736 @@
+/*
+ * Copyright (c) 2015, 2021, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package jdk.internal.loader;
+
+import java.io.File;
+import java.io.FilePermission;
+import java.io.IOException;
+import java.lang.module.Configuration;
+import java.lang.module.ModuleDescriptor;
+import java.lang.module.ModuleReader;
+import java.lang.module.ModuleReference;
+import java.lang.module.ResolvedModule;
+import java.net.MalformedURLException;
+import java.net.URI;
+import java.net.URL;
+import java.nio.ByteBuffer;
+import java.security.AccessControlContext;
+import java.security.AccessController;
+import java.security.CodeSigner;
+import java.security.CodeSource;
+import java.security.Permission;
+import java.security.PermissionCollection;
+import java.security.PrivilegedAction;
+import java.security.PrivilegedActionException;
+import java.security.PrivilegedExceptionAction;
+import java.security.SecureClassLoader;
+import java.util.ArrayList;
+import java.util.Collection;
+import java.util.Collections;
+import java.util.Enumeration;
+import java.util.HashMap;
+import java.util.Iterator;
+import java.util.List;
+import java.util.Map;
+import java.util.Objects;
+import java.util.Optional;
+import java.util.concurrent.ConcurrentHashMap;
+import java.util.stream.Stream;
+
+import jdk.internal.access.SharedSecrets;
+import jdk.internal.module.Resources;
+
+/**
+ * A class loader that loads classes and resources from a collection of
+ * modules, or from a single module where the class loader is a member
+ * of a pool of class loaders.
+ *
+ * <p> The delegation model used by this ClassLoader differs to the regular
+ * delegation model. When requested to load a class then this ClassLoader first
+ * maps the class name to its package name. If there a module defined to the
+ * Loader containing the package then the class loader attempts to load from
+ * that module. If the package is instead defined to a module in a "remote"
+ * ClassLoader then this class loader delegates directly to that class loader.
+ * The map of package name to remote class loader is created based on the
+ * modules read by modules defined to this class loader. If the package is not
+ * local or remote then this class loader will delegate to the parent class
+ * loader. This allows automatic modules (for example) to link to types in the
+ * unnamed module of the parent class loader.
+ *
+ * @see ModuleLayer#defineModulesWithOneLoader
+ * @see ModuleLayer#defineModulesWithManyLoaders
+ */
+
+public final class Loader extends SecureClassLoader {
+
+    static {
+        ClassLoader.registerAsParallelCapable();
+    }
+
+    // the pool this loader is a member of; can be null
+    private final LoaderPool pool;
+
+    // parent ClassLoader, can be null
+    private final ClassLoader parent;
+
+    // maps a module name to a module reference
+    private final Map<String, ModuleReference> nameToModule;
+
+    // maps package name to a module loaded by this class loader
+    private final Map<String, LoadedModule> localPackageToModule;
+
+    // maps package name to a remote class loader, populated post initialization
+    private final Map<String, ClassLoader> remotePackageToLoader
+        = new ConcurrentHashMap<>();
+
+    // maps a module reference to a module reader, populated lazily
+    private final Map<ModuleReference, ModuleReader> moduleToReader
+        = new ConcurrentHashMap<>();
+
+    // ACC used when loading classes and resources
+    @SuppressWarnings("removal")
+    private final AccessControlContext acc;
+
+    /**
+     * A module defined/loaded to a {@code Loader}.
+     */
+    private static class LoadedModule {
+        private final ModuleReference mref;
+        private final URL url;          // may be null
+        private final CodeSource cs;
+
+        LoadedModule(ModuleReference mref) {
+            URL url = null;
+            if (mref.location().isPresent()) {
+                try {
+                    url = mref.location().get().toURL();
+                } catch (MalformedURLException | IllegalArgumentException e) { }
+            }
+            this.mref = mref;
+            this.url = url;
+            this.cs = new CodeSource(url, (CodeSigner[]) null);
+        }
+
+        ModuleReference mref() { return mref; }
+        String name() { return mref.descriptor().name(); }
+        URL location() { return url; }
+        CodeSource codeSource() { return cs; }
+    }
+
+
+    /**
+     * Creates a {@code Loader} in a loader pool that loads classes/resources
+     * from one module.
+     */
+    @SuppressWarnings("removal")
+    public Loader(ResolvedModule resolvedModule,
+                  LoaderPool pool,
+                  ClassLoader parent)
+    {
+        super("Loader-" + resolvedModule.name(), parent);
+
+        this.pool = pool;
+        this.parent = parent;
+
+        ModuleReference mref = resolvedModule.reference();
+        ModuleDescriptor descriptor = mref.descriptor();
+        String mn = descriptor.name();
+        this.nameToModule = Map.of(mn, mref);
+
+        Map<String, LoadedModule> localPackageToModule = new HashMap<>();
+        LoadedModule lm = new LoadedModule(mref);
+        descriptor.packages().forEach(pn -> localPackageToModule.put(pn, lm));
+        this.localPackageToModule = localPackageToModule;
+
+        this.acc = AccessController.getContext();
+    }
+
+    /**
+     * Creates a {@code Loader} that loads classes/resources from a collection
+     * of modules.
+     *
+     * @throws IllegalArgumentException
+     *         If two or more modules have the same package
+     */
+    @SuppressWarnings("removal")
+    public Loader(Collection<ResolvedModule> modules, ClassLoader parent) {
+        super(parent);
+
+        this.pool = null;
+        this.parent = parent;
+
+        Map<String, ModuleReference> nameToModule = new HashMap<>();
+        Map<String, LoadedModule> localPackageToModule = new HashMap<>();
+        for (ResolvedModule resolvedModule : modules) {
+            ModuleReference mref = resolvedModule.reference();
+            ModuleDescriptor descriptor = mref.descriptor();
+            nameToModule.put(descriptor.name(), mref);
+            descriptor.packages().forEach(pn -> {
+                LoadedModule lm = new LoadedModule(mref);
+                if (localPackageToModule.put(pn, lm) != null)
+                    throw new IllegalArgumentException("Package "
+                        + pn + " in more than one module");
+            });
+        }
+        this.nameToModule = nameToModule;
+        this.localPackageToModule = localPackageToModule;
+
+        this.acc = AccessController.getContext();
+    }
+
+    /**
+     * Completes initialization of this Loader. This method populates
+     * remotePackageToLoader with the packages of the remote modules, where
+     * "remote modules" are the modules read by modules defined to this loader.
+     *
+     * @param cf the Configuration containing at least modules to be defined to
+     *           this class loader
+     *
+     * @param parentModuleLayers the parent ModuleLayers
+     */
+    public Loader initRemotePackageMap(Configuration cf,
+                                       List<ModuleLayer> parentModuleLayers)
+    {
+        for (String name : nameToModule.keySet()) {
+            ResolvedModule resolvedModule = cf.findModule(name).get();
+            assert resolvedModule.configuration() == cf;
+
+            for (ResolvedModule other : resolvedModule.reads()) {
+                String mn = other.name();
+                ClassLoader loader;
+
+                if (other.configuration() == cf) {
+
+                    // The module reads another module in the newly created
+                    // layer. If all modules are defined to the same class
+                    // loader then the packages are local.
+                    if (pool == null) {
+                        assert nameToModule.containsKey(mn);
+                        continue;
+                    }
+
+                    loader = pool.loaderFor(mn);
+                    assert loader != null;
+
+                } else {
+
+                    // find the layer for the target module
+                    ModuleLayer layer = parentModuleLayers.stream()
+                        .map(parent -> findModuleLayer(parent, other.configuration()))
+                        .flatMap(Optional::stream)
+                        .findAny()
+                        .orElseThrow(() ->
+                            new InternalError("Unable to find parent layer"));
+
+                    // find the class loader for the module
+                    // For now we use the platform loader for modules defined to the
+                    // boot loader
+                    assert layer.findModule(mn).isPresent();
+                    loader = layer.findLoader(mn);
+                    if (loader == null)
+                        loader = ClassLoaders.platformClassLoader();
+                }
+
+                // find the packages that are exported to the target module
+                ModuleDescriptor descriptor = other.reference().descriptor();
+                if (descriptor.isAutomatic()) {
+                    ClassLoader l = loader;
+                    descriptor.packages().forEach(pn -> remotePackage(pn, l));
+                } else {
+                    String target = resolvedModule.name();
+                    for (ModuleDescriptor.Exports e : descriptor.exports()) {
+                        boolean delegate;
+                        if (e.isQualified()) {
+                            // qualified export in same configuration
+                            delegate = (other.configuration() == cf)
+                                    && e.targets().contains(target);
+                        } else {
+                            // unqualified
+                            delegate = true;
+                        }
+
+                        if (delegate) {
+                            remotePackage(e.source(), loader);
+                        }
+                    }
+                }
+            }
+
+        }
+
+        return this;
+    }
+
+    /**
+     * Adds to remotePackageToLoader so that an attempt to load a class in
+     * the package delegates to the given class loader.
+     *
+     * @throws IllegalStateException
+     *         if the package is already mapped to a different class loader
+     */
+    private void remotePackage(String pn, ClassLoader loader) {
+        ClassLoader l = remotePackageToLoader.putIfAbsent(pn, loader);
+        if (l != null && l != loader) {
+            throw new IllegalStateException("Package "
+                + pn + " cannot be imported from multiple loaders");
+        }
+    }
+
+
+    /**
+     * Find the layer corresponding to the given configuration in the tree
+     * of layers rooted at the given parent.
+     */
+    private Optional<ModuleLayer> findModuleLayer(ModuleLayer parent, Configuration cf) {
+        return SharedSecrets.getJavaLangAccess().layers(parent)
+                .filter(l -> l.configuration() == cf)
+                .findAny();
+    }
+
+
+    /**
+     * Returns the loader pool that this loader is in or {@code null} if this
+     * loader is not in a loader pool.
+     */
+    public LoaderPool pool() {
+        return pool;
+    }
+
+
+    // -- resources --
+
+    /**
+     * Returns a URL to a resource of the given name in a module defined to
+     * this class loader.
+     */
+    @SuppressWarnings("removal")
+    @Override
+    protected URL findResource(String mn, String name) throws IOException {
+        ModuleReference mref = (mn != null) ? nameToModule.get(mn) : null;
+        if (mref == null)
+            return null;   // not defined to this class loader
+
+        // locate resource
+        URL url = null;
+        try {
+            url = AccessController.doPrivileged(
+                new PrivilegedExceptionAction<URL>() {
+                    @Override
+                    public URL run() throws IOException {
+                        Optional<URI> ouri = moduleReaderFor(mref).find(name);
+                        if (ouri.isPresent()) {
+                            try {
+                                return ouri.get().toURL();
+                            } catch (MalformedURLException |
+                                     IllegalArgumentException e) { }
+                        }
+                        return null;
+                    }
+                });
+        } catch (PrivilegedActionException pae) {
+            throw (IOException) pae.getCause();
+        }
+
+        // check access with permissions restricted by ACC
+        if (url != null && System.getSecurityManager() != null) {
+            try {
+                URL urlToCheck = url;
+                url = AccessController.doPrivileged(
+                    new PrivilegedExceptionAction<URL>() {
+                        @Override
+                        public URL run() throws IOException {
+                            return URLClassPath.checkURL(urlToCheck);
+                        }
+                    }, acc);
+            } catch (PrivilegedActionException pae) {
+                url = null;
+            }
+        }
+
+        return url;
+    }
+
+    @Override
+    public URL findResource(String name) {
+        String pn = Resources.toPackageName(name);
+        LoadedModule module = localPackageToModule.get(pn);
+
+        if (module != null) {
+            try {
+                URL url = findResource(module.name(), name);
+                if (url != null
+                    && (name.endsWith(".class")
+                        || url.toString().endsWith("/")
+                        || isOpen(module.mref(), pn))) {
+                    return url;
+                }
+            } catch (IOException ioe) {
+                // ignore
+            }
+
+        } else {
+            for (ModuleReference mref : nameToModule.values()) {
+                try {
+                    URL url = findResource(mref.descriptor().name(), name);
+                    if (url != null) return url;
+                } catch (IOException ioe) {
+                    // ignore
+                }
+            }
+        }
+
+        return null;
+    }
+
+    @Override
+    public Enumeration<URL> findResources(String name) throws IOException {
+        return Collections.enumeration(findResourcesAsList(name));
+    }
+
+    @Override
+    public URL getResource(String name) {
+        Objects.requireNonNull(name);
+
+        // this loader
+        URL url = findResource(name);
+        if (url == null) {
+            // parent loader
+            if (parent != null) {
+                url = parent.getResource(name);
+            } else {
+                url = BootLoader.findResource(name);
+            }
+        }
+        return url;
+    }
+
+    @Override
+    public Enumeration<URL> getResources(String name) throws IOException {
+        Objects.requireNonNull(name);
+
+        // this loader
+        List<URL> urls = findResourcesAsList(name);
+
+        // parent loader
+        Enumeration<URL> e;
+        if (parent != null) {
+            e = parent.getResources(name);
+        } else {
+            e = BootLoader.findResources(name);
+        }
+
+        // concat the URLs with the URLs returned by the parent
+        return new Enumeration<>() {
+            final Iterator<URL> iterator = urls.iterator();
+            @Override
+            public boolean hasMoreElements() {
+                return (iterator.hasNext() || e.hasMoreElements());
+            }
+            @Override
+            public URL nextElement() {
+                if (iterator.hasNext()) {
+                    return iterator.next();
+                } else {
+                    return e.nextElement();
+                }
+            }
+        };
+    }
+
+    /**
+     * Finds the resources with the given name in this class loader.
+     */
+    private List<URL> findResourcesAsList(String name) throws IOException {
+        String pn = Resources.toPackageName(name);
+        LoadedModule module = localPackageToModule.get(pn);
+        if (module != null) {
+            URL url = findResource(module.name(), name);
+            if (url != null
+                    && (name.endsWith(".class")
+                    || url.toString().endsWith("/")
+                    || isOpen(module.mref(), pn))) {
+                return List.of(url);
+            } else {
+                return Collections.emptyList();
+            }
+        } else {
+            List<URL> urls = new ArrayList<>();
+            for (ModuleReference mref : nameToModule.values()) {
+                URL url = findResource(mref.descriptor().name(), name);
+                if (url != null) {
+                    urls.add(url);
+                }
+            }
+            return urls;
+        }
+    }
+
+
+    // -- finding/loading classes
+
+    /**
+     * Finds the class with the specified binary name.
+     */
+    @Override
+    protected Class<?> findClass(String cn) throws ClassNotFoundException {
+        Class<?> c = null;
+        LoadedModule loadedModule = findLoadedModule(cn);
+        if (loadedModule != null)
+            c = findClassInModuleOrNull(loadedModule, cn);
+        if (c == null)
+            throw new ClassNotFoundException(cn);
+        return c;
+    }
+
+    /**
+     * Finds the class with the specified binary name in the given module.
+     * This method returns {@code null} if the class cannot be found.
+     */
+    @Override
+    protected Class<?> findClass(String mn, String cn) {
+        Class<?> c = null;
+        LoadedModule loadedModule = findLoadedModule(cn);
+        if (loadedModule != null && loadedModule.name().equals(mn))
+            c = findClassInModuleOrNull(loadedModule, cn);
+        return c;
+    }
+
+    /**
+     * Loads the class with the specified binary name.
+     */
+    @Override
+    protected Class<?> loadClass(String cn, boolean resolve)
+        throws ClassNotFoundException
+    {
+        @SuppressWarnings("removal")
+        SecurityManager sm = System.getSecurityManager();
+        if (sm != null) {
+            String pn = packageName(cn);
+            if (!pn.isEmpty()) {
+                sm.checkPackageAccess(pn);
+            }
+        }
+
+        synchronized (getClassLoadingLock(cn)) {
+            // check if already loaded
+            Class<?> c = findLoadedClass(cn);
+
+            if (c == null) {
+
+                LoadedModule loadedModule = findLoadedModule(cn);
+
+                if (loadedModule != null) {
+
+                    // class is in module defined to this class loader
+                    c = findClassInModuleOrNull(loadedModule, cn);
+
+                } else {
+
+                    // type in another module or visible via the parent loader
+                    String pn = packageName(cn);
+                    ClassLoader loader = remotePackageToLoader.get(pn);
+                    if (loader == null) {
+                        // type not in a module read by any of the modules
+                        // defined to this loader, so delegate to parent
+                        // class loader
+                        loader = parent;
+                    }
+                    if (loader == null) {
+                        c = BootLoader.loadClassOrNull(cn);
+                    } else {
+                        c = loader.loadClass(cn);
+                    }
+
+                }
+            }
+
+            if (c == null)
+                throw new ClassNotFoundException(cn);
+
+            if (resolve)
+                resolveClass(c);
+
+            return c;
+        }
+    }
+
+
+    /**
+     * Finds the class with the specified binary name if in a module
+     * defined to this ClassLoader.
+     *
+     * @return the resulting Class or {@code null} if not found
+     */
+    @SuppressWarnings("removal")
+    private Class<?> findClassInModuleOrNull(LoadedModule loadedModule, String cn) {
+        PrivilegedAction<Class<?>> pa = () -> defineClass(cn, loadedModule);
+        return AccessController.doPrivileged(pa, acc);
+    }
+
+    /**
+     * Defines the given binary class name to the VM, loading the class
+     * bytes from the given module.
+     *
+     * @return the resulting Class or {@code null} if an I/O error occurs
+     */
+    private Class<?> defineClass(String cn, LoadedModule loadedModule) {
+        ModuleReader reader = moduleReaderFor(loadedModule.mref());
+
+        try {
+            // read class file
+            String rn = cn.replace('.', '/').concat(".class");
+            ByteBuffer bb = reader.read(rn).orElse(null);
+            if (bb == null) {
+                // class not found
+                return null;
+            }
+
+            try {
+                return defineClass(cn, bb, loadedModule.codeSource());
+            } finally {
+                reader.release(bb);
+            }
+
+        } catch (IOException ioe) {
+            // TBD on how I/O errors should be propagated
+            return null;
+        }
+    }
+
+
+    // -- permissions
+
+    /**
+     * Returns the permissions for the given CodeSource.
+     */
+    @Override
+    protected PermissionCollection getPermissions(CodeSource cs) {
+        PermissionCollection perms = super.getPermissions(cs);
+
+        URL url = cs.getLocation();
+        if (url == null)
+            return perms;
+
+        // add the permission to access the resource
+        try {
+            Permission p = url.openConnection().getPermission();
+            if (p != null) {
+                // for directories then need recursive access
+                if (p instanceof FilePermission) {
+                    String path = p.getName();
+                    if (path.endsWith(File.separator)) {
+                        path += "-";
+                        p = new FilePermission(path, "read");
+                    }
+                }
+                perms.add(p);
+            }
+        } catch (IOException ioe) { }
+
+        return perms;
+    }
+
+
+    // -- miscellaneous supporting methods
+
+    /**
+     * Find the candidate module for the given class name.
+     * Returns {@code null} if none of the modules defined to this
+     * class loader contain the API package for the class.
+     */
+    private LoadedModule findLoadedModule(String cn) {
+        String pn = packageName(cn);
+        return pn.isEmpty() ? null : localPackageToModule.get(pn);
+    }
+
+    /**
+     * Returns the package name for the given class name
+     */
+    private String packageName(String cn) {
+        int pos = cn.lastIndexOf('.');
+        return (pos < 0) ? "" : cn.substring(0, pos);
+    }
+
+
+    /**
+     * Returns the ModuleReader for the given module.
+     */
+    private ModuleReader moduleReaderFor(ModuleReference mref) {
+        return moduleToReader.computeIfAbsent(mref, m -> createModuleReader(mref));
+    }
+
+    /**
+     * Creates a ModuleReader for the given module.
+     */
+    private ModuleReader createModuleReader(ModuleReference mref) {
+        try {
+            return mref.open();
+        } catch (IOException e) {
+            // Return a null module reader to avoid a future class load
+            // attempting to open the module again.
+            return new NullModuleReader();
+        }
+    }
+
+    /**
+     * A ModuleReader that doesn't read any resources.
+     */
+    private static class NullModuleReader implements ModuleReader {
+        @Override
+        public Optional<URI> find(String name) {
+            return Optional.empty();
+        }
+        @Override
+        public Stream<String> list() {
+            return Stream.empty();
+        }
+        @Override
+        public void close() {
+            throw new InternalError("Should not get here");
+        }
+    }
+
+    /**
+     * Returns true if the given module opens the given package
+     * unconditionally.
+     *
+     * @implNote This method currently iterates over each of the open
+     * packages. This will be replaced once the ModuleDescriptor.Opens
+     * API is updated.
+     */
+    private boolean isOpen(ModuleReference mref, String pn) {
+        ModuleDescriptor descriptor = mref.descriptor();
+        if (descriptor.isOpen() || descriptor.isAutomatic())
+            return true;
+        for (ModuleDescriptor.Opens opens : descriptor.opens()) {
+            String source = opens.source();
+            if (!opens.isQualified() && source.equals(pn)) {
+                return true;
+            }
+        }
+        return false;
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/loader/LoaderPool.class b/tests/test_data/std/jdk/internal/loader/LoaderPool.class
new file mode 100644
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GIT binary patch
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/loader/LoaderPool.java b/tests/test_data/std/jdk/internal/loader/LoaderPool.java
new file mode 100644
index 00000000..c0bdecf6
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/loader/LoaderPool.java
@@ -0,0 +1,85 @@
+/*
+ * Copyright (c) 2015, 2018, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package jdk.internal.loader;
+
+import java.lang.module.Configuration;
+import java.lang.module.ResolvedModule;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import java.util.stream.Stream;
+
+/**
+ * A pool of class loaders.
+ *
+ * @see ModuleLayer#defineModulesWithManyLoaders
+ */
+
+public final class LoaderPool {
+
+    // maps module names to class loaders
+    private final Map<String, Loader> loaders;
+
+
+    /**
+     * Creates a pool of class loaders. Each module in the given configuration
+     * is mapped to its own class loader in the pool. The class loader is
+     * created with the given parent class loader as its parent.
+     */
+    public LoaderPool(Configuration cf,
+                      List<ModuleLayer> parentLayers,
+                      ClassLoader parentLoader)
+    {
+        Map<String, Loader> loaders = new HashMap<>();
+        for (ResolvedModule resolvedModule : cf.modules()) {
+            Loader loader = new Loader(resolvedModule, this, parentLoader);
+            String mn = resolvedModule.name();
+            loaders.put(mn, loader);
+        }
+        this.loaders = loaders;
+
+        // complete the initialization
+        loaders.values().forEach(l -> l.initRemotePackageMap(cf, parentLayers));
+    }
+
+
+    /**
+     * Returns the class loader for the named module
+     */
+    public Loader loaderFor(String name) {
+        Loader loader = loaders.get(name);
+        assert loader != null;
+        return loader;
+    }
+
+    /**
+     * Returns a stream of the loaders in this pool.
+     */
+    public Stream<Loader> loaders() {
+        return loaders.values().stream();
+    }
+
+}
diff --git a/tests/test_data/std/jdk/internal/loader/NativeLibraries$1.class b/tests/test_data/std/jdk/internal/loader/NativeLibraries$1.class
new file mode 100644
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GIT binary patch
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diff --git a/tests/test_data/std/jdk/internal/loader/NativeLibraries$2.class b/tests/test_data/std/jdk/internal/loader/NativeLibraries$2.class
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HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/loader/NativeLibraries$3.class b/tests/test_data/std/jdk/internal/loader/NativeLibraries$3.class
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/loader/NativeLibraries$CountedLock.class b/tests/test_data/std/jdk/internal/loader/NativeLibraries$CountedLock.class
new file mode 100644
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GIT binary patch
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/loader/NativeLibraries$LibraryPaths.class b/tests/test_data/std/jdk/internal/loader/NativeLibraries$LibraryPaths.class
new file mode 100644
index 0000000000000000000000000000000000000000..794c7fbd07d276d322bd8d1db55814c1afad1527
GIT binary patch
literal 824
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/loader/NativeLibraries$NativeLibraryContext$1.class b/tests/test_data/std/jdk/internal/loader/NativeLibraries$NativeLibraryContext$1.class
new file mode 100644
index 0000000000000000000000000000000000000000..1bf7978d054547878cde53d15b647f8941160d3c
GIT binary patch
literal 1356
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/loader/NativeLibraries$NativeLibraryContext.class b/tests/test_data/std/jdk/internal/loader/NativeLibraries$NativeLibraryContext.class
new file mode 100644
index 0000000000000000000000000000000000000000..a5e227279bef8b39d1658c35c3b6b2661d849a98
GIT binary patch
literal 2271
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/loader/NativeLibraries$NativeLibraryImpl$1.class b/tests/test_data/std/jdk/internal/loader/NativeLibraries$NativeLibraryImpl$1.class
new file mode 100644
index 0000000000000000000000000000000000000000..ead3ced06c0c89b0559e9035d06af414c397dd86
GIT binary patch
literal 1331
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/loader/NativeLibraries$NativeLibraryImpl.class b/tests/test_data/std/jdk/internal/loader/NativeLibraries$NativeLibraryImpl.class
new file mode 100644
index 0000000000000000000000000000000000000000..65530fc4fe50adf6bc07cbd0ed8a56ca557e1377
GIT binary patch
literal 2444
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/loader/NativeLibraries$Unloader.class b/tests/test_data/std/jdk/internal/loader/NativeLibraries$Unloader.class
new file mode 100644
index 0000000000000000000000000000000000000000..648efdff730b455273da0e75384666653b0fed8d
GIT binary patch
literal 2088
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/loader/NativeLibraries.class b/tests/test_data/std/jdk/internal/loader/NativeLibraries.class
new file mode 100644
index 0000000000000000000000000000000000000000..4b1d5d48548de16127897e7f428f1c864da7ffc4
GIT binary patch
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diff --git a/tests/test_data/std/jdk/internal/loader/NativeLibraries.java b/tests/test_data/std/jdk/internal/loader/NativeLibraries.java
new file mode 100644
index 00000000..64a3813a
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/loader/NativeLibraries.java
@@ -0,0 +1,551 @@
+/*
+ * Copyright (c) 2020, 2022, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package jdk.internal.loader;
+
+import jdk.internal.misc.VM;
+import jdk.internal.ref.CleanerFactory;
+import jdk.internal.util.StaticProperty;
+
+import java.io.File;
+import java.io.IOException;
+import java.security.AccessController;
+import java.security.PrivilegedAction;
+import java.util.ArrayDeque;
+import java.util.Deque;
+import java.util.function.BiFunction;
+import java.util.function.Function;
+import java.util.Map;
+import java.util.Set;
+import java.util.concurrent.ConcurrentHashMap;
+import java.util.concurrent.locks.ReentrantLock;
+
+/**
+ * Native libraries are loaded via {@link System#loadLibrary(String)},
+ * {@link System#load(String)}, {@link Runtime#loadLibrary(String)} and
+ * {@link Runtime#load(String)}.  They are caller-sensitive.
+ *
+ * Each class loader has a NativeLibraries instance to register all of its
+ * loaded native libraries.  System::loadLibrary (and other APIs) only
+ * allows a native library to be loaded by one class loader, i.e. one
+ * NativeLibraries instance.  Any attempt to load a native library that
+ * has already been loaded by a class loader with another class loader
+ * will fail.
+ */
+public final class NativeLibraries {
+    private static final boolean loadLibraryOnlyIfPresent = ClassLoaderHelper.loadLibraryOnlyIfPresent();
+    private final Map<String, NativeLibraryImpl> libraries = new ConcurrentHashMap<>();
+    private final ClassLoader loader;
+    // caller, if non-null, is the fromClass parameter for NativeLibraries::loadLibrary
+    // unless specified
+    private final Class<?> caller;      // may be null
+    private final boolean searchJavaLibraryPath;
+
+    /**
+     * Creates a NativeLibraries instance for loading JNI native libraries
+     * via for System::loadLibrary use.
+     *
+     * 1. Support of auto-unloading.  The loaded native libraries are unloaded
+     *    when the class loader is reclaimed.
+     * 2. Support of linking of native method.  See JNI spec.
+     * 3. Restriction on a native library that can only be loaded by one class loader.
+     *    Each class loader manages its own set of native libraries.
+     *    The same JNI native library cannot be loaded into more than one class loader.
+     *
+     * This static factory method is intended only for System::loadLibrary use.
+     *
+     * @see <a href="${docroot}/specs/jni/invocation.html##library-and-version-management">
+     *     JNI Specification: Library and Version Management</a>
+     */
+    public static NativeLibraries newInstance(ClassLoader loader) {
+        return new NativeLibraries(loader, loader != null ? null : NativeLibraries.class, loader != null);
+    }
+
+    private NativeLibraries(ClassLoader loader, Class<?> caller, boolean searchJavaLibraryPath) {
+        this.loader = loader;
+        this.caller = caller;
+        this.searchJavaLibraryPath = searchJavaLibraryPath;
+    }
+
+    /*
+     * Find the address of the given symbol name from the native libraries
+     * loaded in this NativeLibraries instance.
+     */
+    public long find(String name) {
+        if (libraries.isEmpty())
+            return 0;
+
+        // the native libraries map may be updated in another thread
+        // when a native library is being loaded.  No symbol will be
+        // searched from it yet.
+        for (NativeLibrary lib : libraries.values()) {
+            long entry = lib.find(name);
+            if (entry != 0) return entry;
+        }
+        return 0;
+    }
+
+    /*
+     * Load a native library from the given file.  Returns null if the given
+     * library is determined to be non-loadable, which is system-dependent.
+     *
+     * @param fromClass the caller class calling System::loadLibrary
+     * @param file the path of the native library
+     * @throws UnsatisfiedLinkError if any error in loading the native library
+     */
+    @SuppressWarnings("removal")
+    public NativeLibrary loadLibrary(Class<?> fromClass, File file) {
+        // Check to see if we're attempting to access a static library
+        String name = findBuiltinLib(file.getName());
+        boolean isBuiltin = (name != null);
+        if (!isBuiltin) {
+            name = AccessController.doPrivileged(new PrivilegedAction<>() {
+                    public String run() {
+                        try {
+                            if (loadLibraryOnlyIfPresent && !file.exists()) {
+                                return null;
+                            }
+                            return file.getCanonicalPath();
+                        } catch (IOException e) {
+                            return null;
+                        }
+                    }
+                });
+            if (name == null) {
+                return null;
+            }
+        }
+        return loadLibrary(fromClass, name, isBuiltin);
+    }
+
+    /**
+     * Returns a NativeLibrary of the given name.
+     *
+     * @param fromClass the caller class calling System::loadLibrary
+     * @param name      library name
+     * @param isBuiltin built-in library
+     * @throws UnsatisfiedLinkError if the native library has already been loaded
+     *      and registered in another NativeLibraries
+     */
+    private NativeLibrary loadLibrary(Class<?> fromClass, String name, boolean isBuiltin) {
+        ClassLoader loader = (fromClass == null) ? null : fromClass.getClassLoader();
+        if (this.loader != loader) {
+            throw new InternalError(fromClass.getName() + " not allowed to load library");
+        }
+
+        acquireNativeLibraryLock(name);
+        try {
+            // find if this library has already been loaded and registered in this NativeLibraries
+            NativeLibrary cached = libraries.get(name);
+            if (cached != null) {
+                return cached;
+            }
+
+            // cannot be loaded by other class loaders
+            if (loadedLibraryNames.contains(name)) {
+                throw new UnsatisfiedLinkError("Native Library " + name +
+                        " already loaded in another classloader");
+            }
+
+            /*
+             * When a library is being loaded, JNI_OnLoad function can cause
+             * another loadLibrary invocation that should succeed.
+             *
+             * Each thread maintains its own stack to hold the list of
+             * libraries it is loading.
+             *
+             * If there is a pending load operation for the library, we
+             * immediately return success; if the pending load is from
+             * a different class loader, we raise UnsatisfiedLinkError.
+             */
+            for (NativeLibraryImpl lib : NativeLibraryContext.current()) {
+                if (name.equals(lib.name())) {
+                    if (loader == lib.fromClass.getClassLoader()) {
+                        return lib;
+                    } else {
+                        throw new UnsatisfiedLinkError("Native Library " +
+                                name + " is being loaded in another classloader");
+                    }
+                }
+            }
+
+            NativeLibraryImpl lib = new NativeLibraryImpl(fromClass, name, isBuiltin);
+            // load the native library
+            NativeLibraryContext.push(lib);
+            try {
+                if (!lib.open()) {
+                    return null;    // fail to open the native library
+                }
+                // auto unloading is only supported for JNI native libraries
+                // loaded by custom class loaders that can be unloaded.
+                // built-in class loaders are never unloaded.
+                boolean autoUnload = !VM.isSystemDomainLoader(loader) && loader != ClassLoaders.appClassLoader();
+                if (autoUnload) {
+                    // register the loaded native library for auto unloading
+                    // when the class loader is reclaimed, all native libraries
+                    // loaded that class loader will be unloaded.
+                    // The entries in the libraries map are not removed since
+                    // the entire map will be reclaimed altogether.
+                    CleanerFactory.cleaner().register(loader, lib.unloader());
+                }
+            } finally {
+                NativeLibraryContext.pop();
+            }
+            // register the loaded native library
+            loadedLibraryNames.add(name);
+            libraries.put(name, lib);
+            return lib;
+        } finally {
+            releaseNativeLibraryLock(name);
+        }
+    }
+
+    /**
+     * Loads a native library from the system library path and java library path.
+     *
+     * @param name library name
+     *
+     * @throws UnsatisfiedLinkError if the native library has already been loaded
+     *      and registered in another NativeLibraries
+     */
+    public NativeLibrary loadLibrary(String name) {
+        assert name.indexOf(File.separatorChar) < 0;
+        return loadLibrary(caller, name);
+    }
+
+    /**
+     * Loads a native library from the system library path and java library path.
+     *
+     * @param name library name
+     * @param fromClass the caller class calling System::loadLibrary
+     *
+     * @throws UnsatisfiedLinkError if the native library has already been loaded
+     *      and registered in another NativeLibraries
+     */
+    public NativeLibrary loadLibrary(Class<?> fromClass, String name) {
+        assert name.indexOf(File.separatorChar) < 0;
+
+        NativeLibrary lib = findFromPaths(LibraryPaths.SYS_PATHS, fromClass, name);
+        if (lib == null && searchJavaLibraryPath) {
+            lib = findFromPaths(LibraryPaths.USER_PATHS, fromClass, name);
+        }
+        return lib;
+    }
+
+    private NativeLibrary findFromPaths(String[] paths, Class<?> fromClass, String name) {
+        for (String path : paths) {
+            File libfile = new File(path, System.mapLibraryName(name));
+            NativeLibrary nl = loadLibrary(fromClass, libfile);
+            if (nl != null) {
+                return nl;
+            }
+            libfile = ClassLoaderHelper.mapAlternativeName(libfile);
+            if (libfile != null) {
+                nl = loadLibrary(fromClass, libfile);
+                if (nl != null) {
+                    return nl;
+                }
+            }
+        }
+        return null;
+    }
+
+    /**
+     * NativeLibraryImpl denotes a loaded native library instance.
+     * Each NativeLibraries contains a map of loaded native libraries in the
+     * private field {@code libraries}.
+     *
+     * Every native library requires a particular version of JNI. This is
+     * denoted by the private {@code jniVersion} field.  This field is set by
+     * the VM when it loads the library, and used by the VM to pass the correct
+     * version of JNI to the native methods.
+     */
+    static class NativeLibraryImpl extends NativeLibrary {
+        // the class from which the library is loaded, also indicates
+        // the loader this native library belongs.
+        final Class<?> fromClass;
+        // the canonicalized name of the native library.
+        // or static library name
+        final String name;
+        // Indicates if the native library is linked into the VM
+        final boolean isBuiltin;
+
+        // opaque handle to native library, used in native code.
+        long handle;
+        // the version of JNI environment the native library requires.
+        int jniVersion;
+
+        NativeLibraryImpl(Class<?> fromClass, String name, boolean isBuiltin) {
+            this.fromClass = fromClass;
+            this.name = name;
+            this.isBuiltin = isBuiltin;
+        }
+
+        @Override
+        public String name() {
+            return name;
+        }
+
+        @Override
+        public long find(String name) {
+            return findEntry0(handle, name);
+        }
+
+        /*
+         * Unloader::run method is invoked to unload the native library
+         * when this class loader becomes phantom reachable.
+         */
+        private Runnable unloader() {
+            return new Unloader(name, handle, isBuiltin);
+        }
+
+        /*
+         * Loads the named native library
+         */
+        boolean open() {
+            if (handle != 0) {
+                throw new InternalError("Native library " + name + " has been loaded");
+            }
+
+            return load(this, name, isBuiltin, throwExceptionIfFail());
+        }
+
+        @SuppressWarnings("removal")
+        private boolean throwExceptionIfFail() {
+            if (loadLibraryOnlyIfPresent) return true;
+
+            // If the file exists but fails to load, UnsatisfiedLinkException thrown by the VM
+            // will include the error message from dlopen to provide diagnostic information
+            return AccessController.doPrivileged(new PrivilegedAction<>() {
+                public Boolean run() {
+                    File file = new File(name);
+                    return file.exists();
+                }
+            });
+        }
+
+        /*
+         * Close this native library.
+         */
+        void close() {
+            unload(name, isBuiltin, handle);
+        }
+    }
+
+    /*
+     * The run() method will be invoked when this class loader becomes
+     * phantom reachable to unload the native library.
+     */
+    static class Unloader implements Runnable {
+        // This represents the context when a native library is unloaded
+        // and getFromClass() will return null,
+        static final NativeLibraryImpl UNLOADER =
+                new NativeLibraryImpl(null, "dummy", false);
+
+        final String name;
+        final long handle;
+        final boolean isBuiltin;
+
+        Unloader(String name, long handle, boolean isBuiltin) {
+            if (handle == 0) {
+                throw new IllegalArgumentException(
+                        "Invalid handle for native library " + name);
+            }
+
+            this.name = name;
+            this.handle = handle;
+            this.isBuiltin = isBuiltin;
+        }
+
+        @Override
+        public void run() {
+            acquireNativeLibraryLock(name);
+            try {
+                /* remove the native library name */
+                if (!loadedLibraryNames.remove(name)) {
+                    throw new IllegalStateException(name + " has already been unloaded");
+                }
+                NativeLibraryContext.push(UNLOADER);
+                try {
+                    unload(name, isBuiltin, handle);
+                } finally {
+                    NativeLibraryContext.pop();
+                }
+            } finally {
+                releaseNativeLibraryLock(name);
+            }
+        }
+    }
+
+    /*
+     * Holds system and user library paths derived from the
+     * {@code java.library.path} and {@code sun.boot.library.path} system
+     * properties. The system properties are eagerly read at bootstrap, then
+     * lazily parsed on first use to avoid initialization ordering issues.
+     */
+    static class LibraryPaths {
+        // The paths searched for libraries
+        static final String[] SYS_PATHS = ClassLoaderHelper.parsePath(StaticProperty.sunBootLibraryPath());
+        static final String[] USER_PATHS = ClassLoaderHelper.parsePath(StaticProperty.javaLibraryPath());
+    }
+
+    // All native libraries we've loaded.
+    private static final Set<String> loadedLibraryNames =
+            ConcurrentHashMap.newKeySet();
+
+    // reentrant lock class that allows exact counting (with external synchronization)
+    @SuppressWarnings("serial")
+    private static final class CountedLock extends ReentrantLock {
+
+        private int counter = 0;
+
+        public void increment() {
+            if (counter == Integer.MAX_VALUE) {
+                // prevent overflow
+                throw new Error("Maximum lock count exceeded");
+            }
+            ++counter;
+        }
+
+        public void decrement() {
+            --counter;
+        }
+
+        public int getCounter() {
+            return counter;
+        }
+    }
+
+    // Maps native library name to the corresponding lock object
+    private static final Map<String, CountedLock> nativeLibraryLockMap =
+            new ConcurrentHashMap<>();
+
+    private static void acquireNativeLibraryLock(String libraryName) {
+        nativeLibraryLockMap.compute(libraryName,
+            new BiFunction<>() {
+                public CountedLock apply(String name, CountedLock currentLock) {
+                    if (currentLock == null) {
+                        currentLock = new CountedLock();
+                    }
+                    // safe as compute BiFunction<> is executed atomically
+                    currentLock.increment();
+                    return currentLock;
+                }
+            }
+        ).lock();
+    }
+
+    private static void releaseNativeLibraryLock(String libraryName) {
+        CountedLock lock = nativeLibraryLockMap.computeIfPresent(libraryName,
+            new BiFunction<>() {
+                public CountedLock apply(String name, CountedLock currentLock) {
+                    if (currentLock.getCounter() == 1) {
+                        // unlock and release the object if no other threads are queued
+                        currentLock.unlock();
+                        // remove the element
+                        return null;
+                    } else {
+                        currentLock.decrement();
+                        return currentLock;
+                    }
+                }
+            }
+        );
+        if (lock != null) {
+            lock.unlock();
+        }
+    }
+
+    // native libraries being loaded
+    private static final class NativeLibraryContext {
+
+        // Maps thread object to the native library context stack, maintained by each thread
+        private static Map<Thread, Deque<NativeLibraryImpl>> nativeLibraryThreadContext =
+                new ConcurrentHashMap<>();
+
+        // returns a context associated with the current thread
+        private static Deque<NativeLibraryImpl> current() {
+            return nativeLibraryThreadContext.computeIfAbsent(
+                    Thread.currentThread(),
+                    new Function<>() {
+                        public Deque<NativeLibraryImpl> apply(Thread t) {
+                            return new ArrayDeque<>(8);
+                        }
+                    });
+        }
+
+        private static NativeLibraryImpl peek() {
+            return current().peek();
+        }
+
+        private static void push(NativeLibraryImpl lib) {
+            current().push(lib);
+        }
+
+        private static void pop() {
+            // this does not require synchronization since each
+            // thread has its own context
+            Deque<NativeLibraryImpl> libs = current();
+            libs.pop();
+            if (libs.isEmpty()) {
+                // context can be safely removed once empty
+                nativeLibraryThreadContext.remove(Thread.currentThread());
+            }
+        }
+
+        private static boolean isEmpty() {
+            Deque<NativeLibraryImpl> context =
+                    nativeLibraryThreadContext.get(Thread.currentThread());
+            return (context == null || context.isEmpty());
+        }
+    }
+
+    // Invoked in the VM to determine the context class in JNI_OnLoad
+    // and JNI_OnUnload
+    private static Class<?> getFromClass() {
+        if (NativeLibraryContext.isEmpty()) { // only default library
+            return Object.class;
+        }
+        return NativeLibraryContext.peek().fromClass;
+    }
+
+    /*
+     * Return true if the given library is successfully loaded.
+     * If the given library cannot be loaded for any reason,
+     * if throwExceptionIfFail is false, then this method returns false;
+     * otherwise, UnsatisfiedLinkError will be thrown.
+     *
+     * JNI FindClass expects the caller class if invoked from JNI_OnLoad
+     * and JNI_OnUnload is NativeLibrary class.
+     */
+    private static native boolean load(NativeLibraryImpl impl, String name,
+                                       boolean isBuiltin,
+                                       boolean throwExceptionIfFail);
+    /*
+     * Unload the named library.  JNI_OnUnload, if present, will be invoked
+     * before the native library is unloaded.
+     */
+    private static native void unload(String name, boolean isBuiltin, long handle);
+    private static native String findBuiltinLib(String name);
+}
diff --git a/tests/test_data/std/jdk/internal/loader/NativeLibrary.class b/tests/test_data/std/jdk/internal/loader/NativeLibrary.class
new file mode 100644
index 0000000000000000000000000000000000000000..3dfa3c6e09c7f625584deaa5805b9f56d8b75832
GIT binary patch
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HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/loader/NativeLibrary.java b/tests/test_data/std/jdk/internal/loader/NativeLibrary.java
new file mode 100644
index 00000000..228356e0
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/loader/NativeLibrary.java
@@ -0,0 +1,61 @@
+/*
+ * Copyright (c) 2020, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package jdk.internal.loader;
+
+/**
+ * NativeLibrary represents a loaded native library instance.
+ */
+public abstract class NativeLibrary {
+    public abstract String name();
+
+    /**
+     * Finds the address of the entry of the given name.  Returns 0
+     * if not found.
+     *
+     * @param name the name of the symbol to be found
+     */
+    public abstract long find(String name);
+
+    /**
+     * Finds the address of the entry of the given name.
+     *
+     * @param name the name of the symbol to be found
+     * @throws NoSuchMethodException if the named entry is not found.
+     */
+    public final long lookup(String name) throws NoSuchMethodException {
+        long addr = find(name);
+        if (0 == addr) {
+            throw new NoSuchMethodException("Cannot find symbol " + name + " in library " + name());
+        }
+        return addr;
+    }
+
+    /*
+     * Returns the address of the named symbol defined in the library of
+     * the given handle.  Returns 0 if not found.
+     */
+    static native long findEntry0(long handle, String name);
+}
diff --git a/tests/test_data/std/jdk/internal/loader/RawNativeLibraries$1.class b/tests/test_data/std/jdk/internal/loader/RawNativeLibraries$1.class
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literal 0
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diff --git a/tests/test_data/std/jdk/internal/loader/RawNativeLibraries$RawNativeLibraryImpl.class b/tests/test_data/std/jdk/internal/loader/RawNativeLibraries$RawNativeLibraryImpl.class
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HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/loader/RawNativeLibraries.java b/tests/test_data/std/jdk/internal/loader/RawNativeLibraries.java
new file mode 100644
index 00000000..35ed4701
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/loader/RawNativeLibraries.java
@@ -0,0 +1,194 @@
+/*
+ * Copyright (c) 2022, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package jdk.internal.loader;
+
+import jdk.internal.misc.VM;
+
+import java.io.IOException;
+import java.lang.invoke.MethodHandles;
+import java.nio.file.Path;
+import java.security.AccessController;
+import java.security.PrivilegedAction;
+import java.util.Objects;
+import java.util.Set;
+import java.util.concurrent.ConcurrentHashMap;
+
+/**
+ * RawNativeLibraries has the following properties:
+ * 1. Native libraries loaded in this RawNativeLibraries instance are
+ *    not JNI native libraries.  Hence JNI_OnLoad and JNI_OnUnload will
+ *    be ignored.  No support for linking of native method.
+ * 2. Native libraries not auto-unloaded.  They may be explicitly unloaded
+ *    via NativeLibraries::unload.
+ * 3. No relationship with class loaders.
+ */
+public final class RawNativeLibraries {
+    final Set<RawNativeLibraryImpl> libraries = ConcurrentHashMap.newKeySet();
+    final Class<?> caller;
+
+    private RawNativeLibraries(MethodHandles.Lookup trustedCaller) {
+        this.caller = trustedCaller.lookupClass();
+    }
+
+    /**
+     * Creates a RawNativeLibraries instance that has no relationship with
+     * any class loaders and disabled auto unloading.
+     *
+     * This static factory method is restricted for JDK trusted class use.
+     */
+    public static RawNativeLibraries newInstance(MethodHandles.Lookup trustedCaller) {
+        if (!trustedCaller.hasFullPrivilegeAccess() ||
+                !VM.isSystemDomainLoader(trustedCaller.lookupClass().getClassLoader())) {
+            throw new InternalError(trustedCaller + " does not have access to raw native library loading");
+        }
+        return new RawNativeLibraries(trustedCaller);
+    }
+
+    /*
+     * Load a native library from the given path.  Returns null if the given
+     * library is determined to be non-loadable, which is system-dependent.
+     *
+     * The library is opened with the platform-specific library loading
+     * mechanism. If this method is called with the same path multiple times,
+     * the library is opened the same number of times. To close the library
+     * of the given path, {@code #unload} must be called on all the
+     * {@code NativeLibrary} instances that load it.
+     *
+     * @param path the path of the native library
+     */
+    @SuppressWarnings("removal")
+    public NativeLibrary load(Path path) {
+        String name = AccessController.doPrivileged(new PrivilegedAction<>() {
+            public String run() {
+                try {
+                    return path.toRealPath().toString();
+                } catch (IOException e) {
+                    return null;
+                }
+            }
+        });
+        if (name == null) {
+            return null;
+        }
+        return load(name);
+    }
+
+    /**
+     * Load a native library of the given pathname, which is platform-specific.
+     * Returns null if it fails to load the given pathname.
+     *
+     * If the given pathname does not contain a name-separator character,
+     * for example on Unix a slash character, the library search strategy
+     * is system-dependent for example on Unix, see dlopen.
+     *
+     * @apiNote
+     * The {@code pathname} argument is platform-specific.
+     * {@link System#mapLibraryName} can be used to convert a name to
+     * a platform-specific pathname:
+     * {@snippet
+     *     RawNativeLibraries libs = RawNativeLibraries.newInstance(MethodHandles.lookup());
+     *     NativeLibrary lib = libs.load(System.mapLibraryName("blas"));
+     * }
+     *
+     * The library is opened with the platform-specific library loading
+     * mechanism. If this method is called with the same pathname multiple times,
+     * the library is opened the same number of times. To close the library
+     * of the given path, {@code #unload} must be called on all the
+     * {@code NativeLibrary} instances that load it.
+     *
+     * @param pathname the pathname of the native library
+     * @see System#mapLibraryName(String)
+     */
+    public NativeLibrary load(String pathname) {
+        RawNativeLibraryImpl lib = new RawNativeLibraryImpl(pathname);
+        if (!lib.open()) {
+            return null;
+        }
+        libraries.add(lib);
+        return lib;
+    }
+
+    /*
+     * Unloads the given native library.  Each {@code NativeLibrary}
+     * instance can be unloaded only once.
+     *
+     * The native library may remain opened after this method is called.
+     * Refer to the platform-specific library loading mechanism, for example,
+     * dlopen/dlclose on Unix or LoadLibrary/FreeLibrary on Windows.
+     *
+     * @throws IllegalArgumentException if the given library is not
+     * loaded by this RawNativeLibraries or has already been unloaded
+     */
+    public void unload(NativeLibrary lib) {
+        Objects.requireNonNull(lib);
+        if (!libraries.remove(lib)) {
+            throw new IllegalArgumentException("can't unload " + lib.name() + " loaded from " + lib);
+        }
+        RawNativeLibraryImpl nl = (RawNativeLibraryImpl)lib;
+        nl.close();
+    }
+
+    static class RawNativeLibraryImpl extends NativeLibrary {
+        // the name of the raw native library.
+        final String name;
+        // opaque handle to raw native library, used in native code.
+        long handle;
+
+        RawNativeLibraryImpl(String name) {
+            this.name = name;
+        }
+
+        @Override
+        public String name() {
+            return name;
+        }
+
+        @Override
+        public long find(String name) {
+            return findEntry0(handle, name);
+        }
+
+        /*
+         * Loads the named native library.
+         */
+        boolean open() {
+            if (handle != 0) {
+                throw new InternalError("Native library " + name + " has been loaded");
+            }
+            return load0(this, name);
+        }
+
+        /*
+         * Close this native library.
+         */
+        void close() {
+            unload0(name, handle);
+        }
+    }
+
+    private static native boolean load0(RawNativeLibraryImpl impl, String name);
+    private static native void unload0(String name, long handle);
+}
+
diff --git a/tests/test_data/std/jdk/internal/loader/Resource.class b/tests/test_data/std/jdk/internal/loader/Resource.class
new file mode 100644
index 0000000000000000000000000000000000000000..4f66e52e6a341567ec3b4c929b495e37a3d33baf
GIT binary patch
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/loader/Resource.java b/tests/test_data/std/jdk/internal/loader/Resource.java
new file mode 100644
index 00000000..d119c4b5
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/loader/Resource.java
@@ -0,0 +1,198 @@
+/*
+ * Copyright (c) 1998, 2019, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package jdk.internal.loader;
+
+import java.io.EOFException;
+import java.net.URL;
+import java.io.IOException;
+import java.io.InterruptedIOException;
+import java.io.InputStream;
+import java.security.CodeSigner;
+import java.util.jar.Manifest;
+import java.nio.ByteBuffer;
+import java.util.Arrays;
+import sun.nio.ByteBuffered;
+
+/**
+ * This class is used to represent a Resource that has been loaded
+ * from the class path.
+ *
+ * @author  David Connelly
+ * @since   1.2
+ */
+public abstract class Resource {
+    /**
+     * Returns the name of the Resource.
+     */
+    public abstract String getName();
+
+    /**
+     * Returns the URL of the Resource.
+     */
+    public abstract URL getURL();
+
+    /**
+     * Returns the CodeSource URL for the Resource.
+     */
+    public abstract URL getCodeSourceURL();
+
+    /**
+     * Returns an InputStream for reading the Resource data.
+     */
+    public abstract InputStream getInputStream() throws IOException;
+
+    /**
+     * Returns the length of the Resource data, or -1 if unknown.
+     */
+    public abstract int getContentLength() throws IOException;
+
+    private InputStream cis;
+
+    /* Cache result in case getBytes is called after getByteBuffer. */
+    private synchronized InputStream cachedInputStream() throws IOException {
+        if (cis == null) {
+            cis = getInputStream();
+        }
+        return cis;
+    }
+
+    /**
+     * Returns the Resource data as an array of bytes.
+     */
+    public byte[] getBytes() throws IOException {
+        byte[] b;
+        // Get stream before content length so that a FileNotFoundException
+        // can propagate upwards without being caught too early
+        InputStream in = cachedInputStream();
+
+        // This code has been uglified to protect against interrupts.
+        // Even if a thread has been interrupted when loading resources,
+        // the IO should not abort, so must carefully retry, failing only
+        // if the retry leads to some other IO exception.
+
+        boolean isInterrupted = Thread.interrupted();
+        int len;
+        for (;;) {
+            try {
+                len = getContentLength();
+                break;
+            } catch (InterruptedIOException iioe) {
+                Thread.interrupted();
+                isInterrupted = true;
+            }
+        }
+
+        try {
+            b = new byte[0];
+            if (len == -1) len = Integer.MAX_VALUE;
+            int pos = 0;
+            while (pos < len) {
+                int bytesToRead;
+                if (pos >= b.length) { // Only expand when there's no room
+                    bytesToRead = Math.min(len - pos, b.length + 1024);
+                    if (bytesToRead < 0) {
+                        // Can overflow only due to large b.length
+                        bytesToRead = len - pos;
+                    }
+                    b = Arrays.copyOf(b, pos + bytesToRead);
+                } else {
+                    bytesToRead = b.length - pos;
+                }
+                int cc = 0;
+                try {
+                    cc = in.read(b, pos, bytesToRead);
+                } catch (InterruptedIOException iioe) {
+                    Thread.interrupted();
+                    isInterrupted = true;
+                }
+                if (cc < 0) {
+                    if (len != Integer.MAX_VALUE) {
+                        throw new EOFException("Detect premature EOF");
+                    } else {
+                        if (b.length != pos) {
+                            b = Arrays.copyOf(b, pos);
+                        }
+                        break;
+                    }
+                }
+                pos += cc;
+            }
+        } finally {
+            try {
+                in.close();
+            } catch (InterruptedIOException iioe) {
+                isInterrupted = true;
+            } catch (IOException ignore) {}
+
+            if (isInterrupted) {
+                Thread.currentThread().interrupt();
+            }
+        }
+        return b;
+    }
+
+    /**
+     * Returns the Resource data as a ByteBuffer, but only if the input stream
+     * was implemented on top of a ByteBuffer. Return {@code null} otherwise.
+     * @return Resource data or null.
+     */
+    public ByteBuffer getByteBuffer() throws IOException {
+        InputStream in = cachedInputStream();
+        if (in instanceof ByteBuffered) {
+            return ((ByteBuffered)in).getByteBuffer();
+        }
+        return null;
+    }
+
+    /**
+     * Returns the Manifest for the Resource, or null if none.
+     */
+    public Manifest getManifest() throws IOException {
+        return null;
+    }
+
+    /**
+     * Returns theCertificates for the Resource, or null if none.
+     */
+    public java.security.cert.Certificate[] getCertificates() {
+        return null;
+    }
+
+    /**
+     * Returns the code signers for the Resource, or null if none.
+     */
+    public CodeSigner[] getCodeSigners() {
+        return null;
+    }
+
+    /**
+     * Returns non-fatal reading error during data retrieval if there's any.
+     * For example, CRC error when reading a JAR entry.
+     */
+    public Exception getDataError() {
+        return null;
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/loader/URLClassPath$1.class b/tests/test_data/std/jdk/internal/loader/URLClassPath$1.class
new file mode 100644
index 0000000000000000000000000000000000000000..d003c686e87ea38c474da1938ad9037d490f1ae1
GIT binary patch
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diff --git a/tests/test_data/std/jdk/internal/loader/URLClassPath$2.class b/tests/test_data/std/jdk/internal/loader/URLClassPath$2.class
new file mode 100644
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GIT binary patch
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/loader/URLClassPath$3.class b/tests/test_data/std/jdk/internal/loader/URLClassPath$3.class
new file mode 100644
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diff --git a/tests/test_data/std/jdk/internal/loader/URLClassPath$FileLoader$1.class b/tests/test_data/std/jdk/internal/loader/URLClassPath$FileLoader$1.class
new file mode 100644
index 0000000000000000000000000000000000000000..36009be7d11f7bd25b74739553f30da450044dfb
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diff --git a/tests/test_data/std/jdk/internal/loader/URLClassPath$FileLoader.class b/tests/test_data/std/jdk/internal/loader/URLClassPath$FileLoader.class
new file mode 100644
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diff --git a/tests/test_data/std/jdk/internal/loader/URLClassPath$JarLoader$1.class b/tests/test_data/std/jdk/internal/loader/URLClassPath$JarLoader$1.class
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diff --git a/tests/test_data/std/jdk/internal/loader/URLClassPath$JarLoader$2.class b/tests/test_data/std/jdk/internal/loader/URLClassPath$JarLoader$2.class
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diff --git a/tests/test_data/std/jdk/internal/loader/URLClassPath$JarLoader.class b/tests/test_data/std/jdk/internal/loader/URLClassPath$JarLoader.class
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diff --git a/tests/test_data/std/jdk/internal/loader/URLClassPath.java b/tests/test_data/std/jdk/internal/loader/URLClassPath.java
new file mode 100644
index 00000000..dbd76e07
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/loader/URLClassPath.java
@@ -0,0 +1,1092 @@
+/*
+ * Copyright (c) 1997, 2023, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package jdk.internal.loader;
+
+import java.io.Closeable;
+import java.io.File;
+import java.io.FileInputStream;
+import java.io.FileNotFoundException;
+import java.io.IOException;
+import java.io.InputStream;
+import java.net.HttpURLConnection;
+import java.net.JarURLConnection;
+import java.net.MalformedURLException;
+import java.net.URI;
+import java.net.URL;
+import java.net.URLConnection;
+import java.net.URLStreamHandler;
+import java.net.URLStreamHandlerFactory;
+import java.security.AccessControlContext;
+import java.security.AccessControlException;
+import java.security.AccessController;
+import java.security.CodeSigner;
+import java.security.Permission;
+import java.security.PrivilegedActionException;
+import java.security.PrivilegedExceptionAction;
+import java.security.cert.Certificate;
+import java.util.ArrayDeque;
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.Collections;
+import java.util.Enumeration;
+import java.util.HashMap;
+import java.util.List;
+import java.util.NoSuchElementException;
+import java.util.Properties;
+import java.util.StringTokenizer;
+import java.util.jar.JarFile;
+import java.util.zip.CRC32;
+import java.util.zip.ZipEntry;
+import java.util.jar.JarEntry;
+import java.util.jar.Manifest;
+import java.util.jar.Attributes;
+import java.util.jar.Attributes.Name;
+import java.util.zip.ZipFile;
+
+import jdk.internal.access.JavaNetURLAccess;
+import jdk.internal.access.JavaUtilZipFileAccess;
+import jdk.internal.access.SharedSecrets;
+import sun.net.util.URLUtil;
+import sun.net.www.ParseUtil;
+import sun.security.action.GetPropertyAction;
+
+/**
+ * This class is used to maintain a search path of URLs for loading classes
+ * and resources from both JAR files and directories.
+ *
+ * @author  David Connelly
+ */
+public class URLClassPath {
+    private static final String USER_AGENT_JAVA_VERSION = "UA-Java-Version";
+    private static final String JAVA_VERSION;
+    private static final boolean DEBUG;
+    private static final boolean DISABLE_JAR_CHECKING;
+    private static final boolean DISABLE_ACC_CHECKING;
+    private static final boolean DISABLE_CP_URL_CHECK;
+    private static final boolean DEBUG_CP_URL_CHECK;
+
+    static {
+        Properties props = GetPropertyAction.privilegedGetProperties();
+        JAVA_VERSION = props.getProperty("java.version");
+        DEBUG = (props.getProperty("sun.misc.URLClassPath.debug") != null);
+        String p = props.getProperty("sun.misc.URLClassPath.disableJarChecking");
+        DISABLE_JAR_CHECKING = p != null ? p.equals("true") || p.isEmpty() : false;
+
+        p = props.getProperty("jdk.net.URLClassPath.disableRestrictedPermissions");
+        DISABLE_ACC_CHECKING = p != null ? p.equals("true") || p.isEmpty() : false;
+
+        // This property will be removed in a later release
+        p = props.getProperty("jdk.net.URLClassPath.disableClassPathURLCheck");
+        DISABLE_CP_URL_CHECK = p != null ? p.equals("true") || p.isEmpty() : false;
+
+        // Print a message for each Class-Path entry that is ignored (assuming
+        // the check is not disabled).
+        p = props.getProperty("jdk.net.URLClassPath.showIgnoredClassPathEntries");
+        DEBUG_CP_URL_CHECK = p != null ? p.equals("true") || p.isEmpty() : false;
+    }
+
+    /* The original search path of URLs. */
+    private final ArrayList<URL> path;
+
+    /* The deque of unopened URLs */
+    private final ArrayDeque<URL> unopenedUrls;
+
+    /* The resulting search path of Loaders */
+    private final ArrayList<Loader> loaders = new ArrayList<>();
+
+    /* Map of each URL opened to its corresponding Loader */
+    private final HashMap<String, Loader> lmap = new HashMap<>();
+
+    /* The jar protocol handler to use when creating new URLs */
+    private final URLStreamHandler jarHandler;
+
+    /* Whether this URLClassLoader has been closed yet */
+    private boolean closed = false;
+
+    /* The context to be used when loading classes and resources.  If non-null
+     * this is the context that was captured during the creation of the
+     * URLClassLoader. null implies no additional security restrictions. */
+    @SuppressWarnings("removal")
+    private final AccessControlContext acc;
+
+    /**
+     * Creates a new URLClassPath for the given URLs. The URLs will be
+     * searched in the order specified for classes and resources. A URL
+     * ending with a '/' is assumed to refer to a directory. Otherwise,
+     * the URL is assumed to refer to a JAR file.
+     *
+     * @param urls the directory and JAR file URLs to search for classes
+     *        and resources
+     * @param factory the URLStreamHandlerFactory to use when creating new URLs
+     * @param acc the context to be used when loading classes and resources, may
+     *            be null
+     */
+    public URLClassPath(URL[] urls,
+                        URLStreamHandlerFactory factory,
+                        @SuppressWarnings("removal") AccessControlContext acc) {
+        ArrayList<URL> path = new ArrayList<>(urls.length);
+        ArrayDeque<URL> unopenedUrls = new ArrayDeque<>(urls.length);
+        for (URL url : urls) {
+            path.add(url);
+            unopenedUrls.add(url);
+        }
+        this.path = path;
+        this.unopenedUrls = unopenedUrls;
+
+        if (factory != null) {
+            jarHandler = factory.createURLStreamHandler("jar");
+        } else {
+            jarHandler = null;
+        }
+        if (DISABLE_ACC_CHECKING)
+            this.acc = null;
+        else
+            this.acc = acc;
+    }
+
+    public URLClassPath(URL[] urls, @SuppressWarnings("removal") AccessControlContext acc) {
+        this(urls, null, acc);
+    }
+
+    /**
+     * Constructs a URLClassPath from a class path string.
+     *
+     * @param cp the class path string
+     * @param skipEmptyElements indicates if empty elements are ignored or
+     *        treated as the current working directory
+     *
+     * @apiNote Used to create the application class path.
+     */
+    URLClassPath(String cp, boolean skipEmptyElements) {
+        ArrayList<URL> path = new ArrayList<>();
+        if (cp != null) {
+            // map each element of class path to a file URL
+            int off = 0, next;
+            do {
+                next = cp.indexOf(File.pathSeparator, off);
+                String element = (next == -1)
+                    ? cp.substring(off)
+                    : cp.substring(off, next);
+                if (!element.isEmpty() || !skipEmptyElements) {
+                    URL url = toFileURL(element);
+                    if (url != null) path.add(url);
+                }
+                off = next + 1;
+            } while (next != -1);
+        }
+
+        // can't use ArrayDeque#addAll or new ArrayDeque(Collection);
+        // it's too early in the bootstrap to trigger use of lambdas
+        int size = path.size();
+        ArrayDeque<URL> unopenedUrls = new ArrayDeque<>(size);
+        for (int i = 0; i < size; i++)
+            unopenedUrls.add(path.get(i));
+
+        this.unopenedUrls = unopenedUrls;
+        this.path = path;
+        // the application class loader uses the built-in protocol handler to avoid protocol
+        // handler lookup when opening JAR files on the class path.
+        this.jarHandler = new sun.net.www.protocol.jar.Handler();
+        this.acc = null;
+    }
+
+    public synchronized List<IOException> closeLoaders() {
+        if (closed) {
+            return Collections.emptyList();
+        }
+        List<IOException> result = new ArrayList<>();
+        for (Loader loader : loaders) {
+            try {
+                loader.close();
+            } catch (IOException e) {
+                result.add(e);
+            }
+        }
+        closed = true;
+        return result;
+    }
+
+    /**
+     * Appends the specified URL to the search path of directory and JAR
+     * file URLs from which to load classes and resources.
+     * <p>
+     * If the URL specified is null or is already in the list of
+     * URLs, then invoking this method has no effect.
+     */
+    public synchronized void addURL(URL url) {
+        if (closed || url == null)
+            return;
+        synchronized (unopenedUrls) {
+            if (! path.contains(url)) {
+                unopenedUrls.addLast(url);
+                path.add(url);
+            }
+        }
+    }
+
+    /**
+     * Appends the specified file path as a file URL to the search path.
+     */
+    public void addFile(String s) {
+        URL url = toFileURL(s);
+        if (url != null) {
+            addURL(url);
+        }
+    }
+
+    /**
+     * Returns a file URL for the given file path.
+     */
+    private static URL toFileURL(String s) {
+        try {
+            File f = new File(s).getCanonicalFile();
+            return ParseUtil.fileToEncodedURL(f);
+        } catch (IOException e) {
+            return null;
+        }
+    }
+
+    /**
+     * Returns the original search path of URLs.
+     */
+    public URL[] getURLs() {
+        synchronized (unopenedUrls) {
+            return path.toArray(new URL[0]);
+        }
+    }
+
+    /**
+     * Finds the resource with the specified name on the URL search path
+     * or null if not found or security check fails.
+     *
+     * @param name      the name of the resource
+     * @param check     whether to perform a security check
+     * @return a {@code URL} for the resource, or {@code null}
+     * if the resource could not be found.
+     */
+    public URL findResource(String name, boolean check) {
+        Loader loader;
+        for (int i = 0; (loader = getLoader(i)) != null; i++) {
+            URL url = loader.findResource(name, check);
+            if (url != null) {
+                return url;
+            }
+        }
+        return null;
+    }
+
+    /**
+     * Finds the first Resource on the URL search path which has the specified
+     * name. Returns null if no Resource could be found.
+     *
+     * @param name the name of the Resource
+     * @param check     whether to perform a security check
+     * @return the Resource, or null if not found
+     */
+    public Resource getResource(String name, boolean check) {
+        if (DEBUG) {
+            System.err.println("URLClassPath.getResource(\"" + name + "\")");
+        }
+
+        Loader loader;
+        for (int i = 0; (loader = getLoader(i)) != null; i++) {
+            Resource res = loader.getResource(name, check);
+            if (res != null) {
+                return res;
+            }
+        }
+        return null;
+    }
+
+    /**
+     * Finds all resources on the URL search path with the given name.
+     * Returns an enumeration of the URL objects.
+     *
+     * @param name the resource name
+     * @return an Enumeration of all the urls having the specified name
+     */
+    public Enumeration<URL> findResources(final String name,
+                                     final boolean check) {
+        return new Enumeration<>() {
+            private int index = 0;
+            private URL url = null;
+
+            private boolean next() {
+                if (url != null) {
+                    return true;
+                } else {
+                    Loader loader;
+                    while ((loader = getLoader(index++)) != null) {
+                        url = loader.findResource(name, check);
+                        if (url != null) {
+                            return true;
+                        }
+                    }
+                    return false;
+                }
+            }
+
+            public boolean hasMoreElements() {
+                return next();
+            }
+
+            public URL nextElement() {
+                if (!next()) {
+                    throw new NoSuchElementException();
+                }
+                URL u = url;
+                url = null;
+                return u;
+            }
+        };
+    }
+
+    public Resource getResource(String name) {
+        return getResource(name, true);
+    }
+
+    /**
+     * Finds all resources on the URL search path with the given name.
+     * Returns an enumeration of the Resource objects.
+     *
+     * @param name the resource name
+     * @return an Enumeration of all the resources having the specified name
+     */
+    public Enumeration<Resource> getResources(final String name,
+                                    final boolean check) {
+        return new Enumeration<>() {
+            private int index = 0;
+            private Resource res = null;
+
+            private boolean next() {
+                if (res != null) {
+                    return true;
+                } else {
+                    Loader loader;
+                    while ((loader = getLoader(index++)) != null) {
+                        res = loader.getResource(name, check);
+                        if (res != null) {
+                            return true;
+                        }
+                    }
+                    return false;
+                }
+            }
+
+            public boolean hasMoreElements() {
+                return next();
+            }
+
+            public Resource nextElement() {
+                if (!next()) {
+                    throw new NoSuchElementException();
+                }
+                Resource r = res;
+                res = null;
+                return r;
+            }
+        };
+    }
+
+    public Enumeration<Resource> getResources(final String name) {
+        return getResources(name, true);
+    }
+
+    /*
+     * Returns the Loader at the specified position in the URL search
+     * path. The URLs are opened and expanded as needed. Returns null
+     * if the specified index is out of range.
+     */
+    private synchronized Loader getLoader(int index) {
+        if (closed) {
+            return null;
+        }
+        // Expand URL search path until the request can be satisfied
+        // or unopenedUrls is exhausted.
+        while (loaders.size() < index + 1) {
+            final URL url;
+            synchronized (unopenedUrls) {
+                url = unopenedUrls.pollFirst();
+                if (url == null)
+                    return null;
+            }
+            // Skip this URL if it already has a Loader.
+            String urlNoFragString = URLUtil.urlNoFragString(url);
+            if (lmap.containsKey(urlNoFragString)) {
+                continue;
+            }
+            // Otherwise, create a new Loader for the URL.
+            Loader loader;
+            try {
+                loader = getLoader(url);
+                // If the loader defines a local class path then add the
+                // URLs as the next URLs to be opened.
+                URL[] urls = loader.getClassPath();
+                if (urls != null) {
+                    push(urls);
+                }
+            } catch (IOException e) {
+                // Silently ignore for now...
+                continue;
+            } catch (SecurityException se) {
+                // Always silently ignore. The context, if there is one, that
+                // this URLClassPath was given during construction will never
+                // have permission to access the URL.
+                if (DEBUG) {
+                    System.err.println("Failed to access " + url + ", " + se );
+                }
+                continue;
+            }
+            // Finally, add the Loader to the search path.
+            loaders.add(loader);
+            lmap.put(urlNoFragString, loader);
+        }
+        return loaders.get(index);
+    }
+
+    /*
+     * Returns the Loader for the specified base URL.
+     */
+    @SuppressWarnings("removal")
+    private Loader getLoader(final URL url) throws IOException {
+        try {
+            return AccessController.doPrivileged(
+                    new PrivilegedExceptionAction<>() {
+                        public Loader run() throws IOException {
+                            String protocol = url.getProtocol();  // lower cased in URL
+                            String file = url.getFile();
+                            if (file != null && file.endsWith("/")) {
+                                if ("file".equals(protocol)) {
+                                    return new FileLoader(url);
+                                } else if ("jar".equals(protocol) &&
+                                        isDefaultJarHandler(url) &&
+                                        file.endsWith("!/")) {
+                                    // extract the nested URL
+                                    @SuppressWarnings("deprecation")
+                                    URL nestedUrl = new URL(file.substring(0, file.length() - 2));
+                                    return new JarLoader(nestedUrl, jarHandler, acc);
+                                } else {
+                                    return new Loader(url);
+                                }
+                            } else {
+                                return new JarLoader(url, jarHandler, acc);
+                            }
+                        }
+                    }, acc);
+        } catch (PrivilegedActionException pae) {
+            throw (IOException)pae.getException();
+        }
+    }
+
+    private static final JavaNetURLAccess JNUA
+            = SharedSecrets.getJavaNetURLAccess();
+
+    private static boolean isDefaultJarHandler(URL u) {
+        URLStreamHandler h = JNUA.getHandler(u);
+        return h instanceof sun.net.www.protocol.jar.Handler;
+    }
+
+    /*
+     * Pushes the specified URLs onto the head of unopened URLs.
+     */
+    private void push(URL[] urls) {
+        synchronized (unopenedUrls) {
+            for (int i = urls.length - 1; i >= 0; --i) {
+                unopenedUrls.addFirst(urls[i]);
+            }
+        }
+    }
+
+    /*
+     * Checks whether the resource URL should be returned.
+     * Returns null on security check failure.
+     * Called by java.net.URLClassLoader.
+     */
+    public static URL checkURL(URL url) {
+        if (url != null) {
+            try {
+                check(url);
+            } catch (Exception e) {
+                return null;
+            }
+        }
+        return url;
+    }
+
+    /*
+     * Checks whether the resource URL should be returned.
+     * Throws exception on failure.
+     * Called internally within this file.
+     */
+    public static void check(URL url) throws IOException {
+        @SuppressWarnings("removal")
+        SecurityManager security = System.getSecurityManager();
+        if (security != null) {
+            URLConnection urlConnection = url.openConnection();
+            Permission perm = urlConnection.getPermission();
+            if (perm != null) {
+                try {
+                    security.checkPermission(perm);
+                } catch (SecurityException se) {
+                    // fallback to checkRead/checkConnect for pre 1.2
+                    // security managers
+                    if ((perm instanceof java.io.FilePermission) &&
+                        perm.getActions().contains("read")) {
+                        security.checkRead(perm.getName());
+                    } else if ((perm instanceof
+                        java.net.SocketPermission) &&
+                        perm.getActions().contains("connect")) {
+                        URL locUrl = url;
+                        if (urlConnection instanceof JarURLConnection) {
+                            locUrl = ((JarURLConnection)urlConnection).getJarFileURL();
+                        }
+                        security.checkConnect(locUrl.getHost(),
+                                              locUrl.getPort());
+                    } else {
+                        throw se;
+                    }
+                }
+            }
+        }
+    }
+
+    /**
+     * Nested class used to represent a loader of resources and classes
+     * from a base URL.
+     */
+    private static class Loader implements Closeable {
+        private final URL base;
+        private JarFile jarfile; // if this points to a jar file
+
+        /*
+         * Creates a new Loader for the specified URL.
+         */
+        Loader(URL url) {
+            base = url;
+        }
+
+        /*
+         * Returns the base URL for this Loader.
+         */
+        final URL getBaseURL() {
+            return base;
+        }
+
+        URL findResource(final String name, boolean check) {
+            URL url;
+            try {
+                @SuppressWarnings("deprecation")
+                var _unused = url = new URL(base, ParseUtil.encodePath(name, false));
+            } catch (MalformedURLException e) {
+                return null;
+            }
+
+            try {
+                if (check) {
+                    URLClassPath.check(url);
+                }
+
+                /*
+                 * For a HTTP connection we use the HEAD method to
+                 * check if the resource exists.
+                 */
+                URLConnection uc = url.openConnection();
+                if (uc instanceof HttpURLConnection) {
+                    HttpURLConnection hconn = (HttpURLConnection)uc;
+                    hconn.setRequestMethod("HEAD");
+                    if (hconn.getResponseCode() >= HttpURLConnection.HTTP_BAD_REQUEST) {
+                        return null;
+                    }
+                } else {
+                    // our best guess for the other cases
+                    uc.setUseCaches(false);
+                    InputStream is = uc.getInputStream();
+                    is.close();
+                }
+                return url;
+            } catch (Exception e) {
+                return null;
+            }
+        }
+
+        Resource getResource(final String name, boolean check) {
+            final URL url;
+            try {
+                @SuppressWarnings("deprecation")
+                var _unused = url = new URL(base, ParseUtil.encodePath(name, false));
+            } catch (MalformedURLException e) {
+                return null;
+            }
+            final URLConnection uc;
+            try {
+                if (check) {
+                    URLClassPath.check(url);
+                }
+                uc = url.openConnection();
+
+                if (uc instanceof JarURLConnection) {
+                    /* Need to remember the jar file so it can be closed
+                     * in a hurry.
+                     */
+                    JarURLConnection juc = (JarURLConnection)uc;
+                    jarfile = JarLoader.checkJar(juc.getJarFile());
+                }
+
+                InputStream in = uc.getInputStream();
+            } catch (Exception e) {
+                return null;
+            }
+            return new Resource() {
+                public String getName() { return name; }
+                public URL getURL() { return url; }
+                public URL getCodeSourceURL() { return base; }
+                public InputStream getInputStream() throws IOException {
+                    return uc.getInputStream();
+                }
+                public int getContentLength() throws IOException {
+                    return uc.getContentLength();
+                }
+            };
+        }
+
+        /*
+         * Returns the Resource for the specified name, or null if not
+         * found or the caller does not have the permission to get the
+         * resource.
+         */
+        Resource getResource(final String name) {
+            return getResource(name, true);
+        }
+
+        /*
+         * Closes this loader and release all resources.
+         * Method overridden in sub-classes.
+         */
+        @Override
+        public void close() throws IOException {
+            if (jarfile != null) {
+                jarfile.close();
+            }
+        }
+
+        /*
+         * Returns the local class path for this loader, or null if none.
+         */
+        URL[] getClassPath() throws IOException {
+            return null;
+        }
+    }
+
+    /*
+     * Nested class used to represent a Loader of resources from a JAR URL.
+     */
+    private static class JarLoader extends Loader {
+        private JarFile jar;
+        private final URL csu;
+        @SuppressWarnings("removal")
+        private final AccessControlContext acc;
+        private boolean closed = false;
+        private static final JavaUtilZipFileAccess zipAccess =
+                SharedSecrets.getJavaUtilZipFileAccess();
+
+        /*
+         * Creates a new JarLoader for the specified URL referring to
+         * a JAR file.
+         */
+        private JarLoader(URL url, URLStreamHandler jarHandler,
+                          @SuppressWarnings("removal") AccessControlContext acc)
+            throws IOException
+        {
+            super(newURL("jar", "", -1, url + "!/", jarHandler));
+            csu = url;
+            this.acc = acc;
+
+            ensureOpen();
+        }
+
+        @SuppressWarnings("deprecation")
+        private static URL newURL(String protocol, String host, int port, String file, URLStreamHandler handler)
+                throws MalformedURLException
+        {
+            return new URL(protocol, host, port, file, handler);
+        }
+
+        @Override
+        public void close () throws IOException {
+            // closing is synchronized at higher level
+            if (!closed) {
+                closed = true;
+                // in case not already open.
+                ensureOpen();
+                jar.close();
+            }
+        }
+
+        private boolean isOptimizable(URL url) {
+            return "file".equals(url.getProtocol());
+        }
+
+        @SuppressWarnings("removal")
+        private void ensureOpen() throws IOException {
+            if (jar == null) {
+                try {
+                    AccessController.doPrivileged(
+                        new PrivilegedExceptionAction<>() {
+                            public Void run() throws IOException {
+                                if (DEBUG) {
+                                    System.err.println("Opening " + csu);
+                                    Thread.dumpStack();
+                                }
+                                jar = getJarFile(csu);
+                                return null;
+                            }
+                        }, acc);
+                } catch (PrivilegedActionException pae) {
+                    throw (IOException)pae.getException();
+                }
+            }
+        }
+
+        /* Throws if the given jar file is does not start with the correct LOC */
+        @SuppressWarnings("removal")
+        static JarFile checkJar(JarFile jar) throws IOException {
+            if (System.getSecurityManager() != null && !DISABLE_JAR_CHECKING
+                && !zipAccess.startsWithLocHeader(jar)) {
+                IOException x = new IOException("Invalid Jar file");
+                try {
+                    jar.close();
+                } catch (IOException ex) {
+                    x.addSuppressed(ex);
+                }
+                throw x;
+            }
+
+            return jar;
+        }
+
+        private JarFile getJarFile(URL url) throws IOException {
+            // Optimize case where url refers to a local jar file
+            if (isOptimizable(url)) {
+                FileURLMapper p = new FileURLMapper(url);
+                if (!p.exists()) {
+                    throw new FileNotFoundException(p.getPath());
+                }
+                return checkJar(new JarFile(new File(p.getPath()), true, ZipFile.OPEN_READ,
+                        JarFile.runtimeVersion()));
+            }
+            @SuppressWarnings("deprecation")
+            URLConnection uc = (new URL(getBaseURL(), "#runtime")).openConnection();
+            uc.setRequestProperty(USER_AGENT_JAVA_VERSION, JAVA_VERSION);
+            JarFile jarFile = ((JarURLConnection)uc).getJarFile();
+            return checkJar(jarFile);
+        }
+
+        /*
+         * Creates the resource and if the check flag is set to true, checks if
+         * is its okay to return the resource.
+         */
+        Resource checkResource(final String name, boolean check,
+            final JarEntry entry) {
+
+            final URL url;
+            try {
+                String nm;
+                if (jar.isMultiRelease()) {
+                    nm = entry.getRealName();
+                } else {
+                    nm = name;
+                }
+                @SuppressWarnings("deprecation")
+                var _unused = url = new URL(getBaseURL(), ParseUtil.encodePath(nm, false));
+                if (check) {
+                    URLClassPath.check(url);
+                }
+            } catch (@SuppressWarnings("removal") AccessControlException | IOException e) {
+                return null;
+            }
+
+            return new Resource() {
+                private Exception dataError = null;
+                public String getName() { return name; }
+                public URL getURL() { return url; }
+                public URL getCodeSourceURL() { return csu; }
+                public InputStream getInputStream() throws IOException
+                    { return jar.getInputStream(entry); }
+                public int getContentLength()
+                    { return (int)entry.getSize(); }
+                public Manifest getManifest() throws IOException {
+                    SharedSecrets.javaUtilJarAccess().ensureInitialization(jar);
+                    return jar.getManifest();
+                }
+                public Certificate[] getCertificates()
+                    { return entry.getCertificates(); };
+                public CodeSigner[] getCodeSigners()
+                    { return entry.getCodeSigners(); };
+                public Exception getDataError()
+                    { return dataError; }
+                public byte[] getBytes() throws IOException {
+                    byte[] bytes = super.getBytes();
+                    CRC32 crc32 = new CRC32();
+                    crc32.update(bytes);
+                    if (crc32.getValue() != entry.getCrc()) {
+                        dataError = new IOException(
+                                "CRC error while extracting entry from JAR file");
+                    }
+                    return bytes;
+                }
+            };
+        }
+
+        /*
+         * Returns the URL for a resource with the specified name
+         */
+        @Override
+        URL findResource(final String name, boolean check) {
+            Resource rsc = getResource(name, check);
+            if (rsc != null) {
+                return rsc.getURL();
+            }
+            return null;
+        }
+
+        /*
+         * Returns the JAR Resource for the specified name.
+         */
+        @Override
+        Resource getResource(final String name, boolean check) {
+            try {
+                ensureOpen();
+            } catch (IOException e) {
+                throw new InternalError(e);
+            }
+            final JarEntry entry = jar.getJarEntry(name);
+            if (entry != null)
+                return checkResource(name, check, entry);
+
+
+            return null;
+        }
+
+        /*
+         * Returns the JAR file local class path, or null if none.
+         */
+        @Override
+        URL[] getClassPath() throws IOException {
+            ensureOpen();
+
+            // Only get manifest when necessary
+            if (SharedSecrets.javaUtilJarAccess().jarFileHasClassPathAttribute(jar)) {
+                Manifest man = jar.getManifest();
+                if (man != null) {
+                    Attributes attr = man.getMainAttributes();
+                    if (attr != null) {
+                        String value = attr.getValue(Name.CLASS_PATH);
+                        if (value != null) {
+                            return parseClassPath(csu, value);
+                        }
+                    }
+                }
+            }
+            return null;
+        }
+
+        /*
+         * Parses value of the Class-Path manifest attribute and returns
+         * an array of URLs relative to the specified base URL.
+         */
+        private static URL[] parseClassPath(URL base, String value)
+            throws MalformedURLException
+        {
+            StringTokenizer st = new StringTokenizer(value);
+            URL[] urls = new URL[st.countTokens()];
+            int i = 0;
+            while (st.hasMoreTokens()) {
+                String path = st.nextToken();
+                @SuppressWarnings("deprecation")
+                URL url = DISABLE_CP_URL_CHECK ? new URL(base, path) : tryResolve(base, path);
+                if (url != null) {
+                    urls[i] = url;
+                    i++;
+                } else {
+                    if (DEBUG_CP_URL_CHECK) {
+                        System.err.println("Class-Path entry: \"" + path
+                                           + "\" ignored in JAR file " + base);
+                    }
+                }
+            }
+            if (i == 0) {
+                urls = null;
+            } else if (i != urls.length) {
+                // Truncate nulls from end of array
+                urls = Arrays.copyOf(urls, i);
+            }
+            return urls;
+        }
+
+        static URL tryResolve(URL base, String input) throws MalformedURLException {
+            if ("file".equalsIgnoreCase(base.getProtocol())) {
+                return tryResolveFile(base, input);
+            } else {
+                return tryResolveNonFile(base, input);
+            }
+        }
+
+        /**
+         * Attempt to return a file URL by resolving input against a base file
+         * URL.
+         * @return the resolved URL or null if the input is an absolute URL with
+         *         a scheme other than file (ignoring case)
+         * @throws MalformedURLException
+         */
+        static URL tryResolveFile(URL base, String input) throws MalformedURLException {
+            @SuppressWarnings("deprecation")
+            URL retVal = new URL(base, input);
+            if (input.indexOf(':') >= 0 &&
+                    !"file".equalsIgnoreCase(retVal.getProtocol())) {
+                // 'input' contains a ':', which might be a scheme, or might be
+                // a Windows drive letter.  If the protocol for the resolved URL
+                // isn't "file:", it should be ignored.
+                return null;
+            }
+            return retVal;
+        }
+
+        /**
+         * Attempt to return a URL by resolving input against a base URL. Returns
+         * null if the resolved URL is not contained by the base URL.
+         *
+         * @return the resolved URL or null
+         * @throws MalformedURLException
+         */
+        static URL tryResolveNonFile(URL base, String input) throws MalformedURLException {
+            String child = input.replace(File.separatorChar, '/');
+            if (isRelative(child)) {
+                @SuppressWarnings("deprecation")
+                URL url = new URL(base, child);
+                String bp = base.getPath();
+                String urlp = url.getPath();
+                int pos = bp.lastIndexOf('/');
+                if (pos == -1) {
+                    pos = bp.length() - 1;
+                }
+                if (urlp.regionMatches(0, bp, 0, pos + 1)
+                        && urlp.indexOf("..", pos) == -1) {
+                    return url;
+                }
+            }
+            return null;
+        }
+
+        /**
+         * Returns true if the given input is a relative URI.
+         */
+        static boolean isRelative(String child) {
+            try {
+                return !URI.create(child).isAbsolute();
+            } catch (IllegalArgumentException e) {
+                return false;
+            }
+        }
+    }
+
+    /*
+     * Nested class used to represent a loader of classes and resources
+     * from a file URL that refers to a directory.
+     */
+    private static class FileLoader extends Loader {
+        /* Canonicalized File */
+        private final File dir;
+        private final URL normalizedBase;
+
+        /*
+         * Creates a new FileLoader for the specified URL with a file protocol.
+         */
+        private FileLoader(URL url) throws IOException {
+            super(url);
+            String path = url.getFile().replace('/', File.separatorChar);
+            path = ParseUtil.decode(path);
+            dir = (new File(path)).getCanonicalFile();
+            @SuppressWarnings("deprecation")
+            var _unused = normalizedBase = new URL(getBaseURL(), ".");
+        }
+
+        /*
+         * Returns the URL for a resource with the specified name
+         */
+        @Override
+        URL findResource(final String name, boolean check) {
+            Resource rsc = getResource(name, check);
+            if (rsc != null) {
+                return rsc.getURL();
+            }
+            return null;
+        }
+
+        @Override
+        Resource getResource(final String name, boolean check) {
+            final URL url;
+            try {
+                @SuppressWarnings("deprecation")
+                var _unused = url = new URL(getBaseURL(), ParseUtil.encodePath(name, false));
+
+                if (url.getFile().startsWith(normalizedBase.getFile()) == false) {
+                    // requested resource had ../..'s in path
+                    return null;
+                }
+
+                if (check)
+                    URLClassPath.check(url);
+
+                final File file;
+                if (name.contains("..")) {
+                    file = (new File(dir, name.replace('/', File.separatorChar)))
+                          .getCanonicalFile();
+                    if ( !((file.getPath()).startsWith(dir.getPath())) ) {
+                        /* outside of base dir */
+                        return null;
+                    }
+                } else {
+                    file = new File(dir, name.replace('/', File.separatorChar));
+                }
+
+                if (file.exists()) {
+                    return new Resource() {
+                        public String getName() { return name; };
+                        public URL getURL() { return url; };
+                        public URL getCodeSourceURL() { return getBaseURL(); };
+                        public InputStream getInputStream() throws IOException
+                            { return new FileInputStream(file); };
+                        public int getContentLength() throws IOException
+                            { return (int)file.length(); };
+                    };
+                }
+            } catch (Exception e) {
+                return null;
+            }
+            return null;
+        }
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/logger/AbstractLoggerWrapper.class b/tests/test_data/std/jdk/internal/logger/AbstractLoggerWrapper.class
new file mode 100644
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diff --git a/tests/test_data/std/jdk/internal/logger/AbstractLoggerWrapper.java b/tests/test_data/std/jdk/internal/logger/AbstractLoggerWrapper.java
new file mode 100644
index 00000000..95d35ed4
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/logger/AbstractLoggerWrapper.java
@@ -0,0 +1,380 @@
+/*
+ * Copyright (c) 2015, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package jdk.internal.logger;
+
+import java.util.ResourceBundle;
+import java.util.function.Supplier;
+import java.lang.System.Logger;
+import java.lang.System.Logger.Level;
+import sun.util.logging.PlatformLogger;
+
+/**
+ * An implementation of {@link System.Logger System.Logger}
+ * that redirects all calls to a wrapped instance of {@link
+ * System.Logger System.Logger}
+ *
+ * @param <L> Type of the wrapped Logger: {@code Logger} or
+ *        an extension of that interface.
+ *
+ */
+abstract class AbstractLoggerWrapper<L extends Logger>
+    implements Logger, PlatformLogger.Bridge, PlatformLogger.ConfigurableBridge {
+
+    AbstractLoggerWrapper() { }
+
+    abstract L wrapped();
+
+    abstract PlatformLogger.Bridge platformProxy();
+
+    L getWrapped() {
+        return wrapped();
+    }
+
+    @Override
+    public final String getName() {
+        return wrapped().getName();
+    }
+
+    // -----------------------------------------------------------------
+    // Generic methods taking a Level as parameter
+    // -----------------------------------------------------------------
+
+
+    @Override
+    public boolean isLoggable(Level level) {
+        return wrapped().isLoggable(level);
+    }
+
+    @Override
+    public void log(Level level, String msg) {
+        wrapped().log(level, msg);
+    }
+
+    @Override
+    public void log(Level level,
+                    Supplier<String> msgSupplier) {
+        wrapped().log(level, msgSupplier);
+    }
+
+    @Override
+    public void log(Level level, Object obj) {
+        wrapped().log(level, obj);
+    }
+
+    @Override
+    public void log(Level level,
+                   String msg, Throwable thrown) {
+        wrapped().log(level, msg, thrown);
+    }
+
+    @Override
+    public void log(Level level, Supplier<String> msgSupplier, Throwable thrown) {
+        wrapped().log(level, msgSupplier, thrown);
+    }
+
+    @Override
+    public void log(Level level,
+                    String format, Object... params) {
+        wrapped().log(level, format, params);
+    }
+
+    @Override
+    public void log(Level level, ResourceBundle bundle,
+                    String key, Throwable thrown) {
+        wrapped().log(level, bundle, key, thrown);
+    }
+
+    @Override
+    public void log(Level level, ResourceBundle bundle,
+                    String format, Object... params) {
+        wrapped().log(level, bundle, format, params);
+    }
+
+    // ---------------------------------------------------------
+    // Methods from PlatformLogger.Bridge
+    // ---------------------------------------------------------
+
+    @Override
+    public boolean isLoggable(PlatformLogger.Level level) {
+        final PlatformLogger.Bridge platformProxy = platformProxy();
+        if (platformProxy == null) return isLoggable(level.systemLevel());
+        else return platformProxy.isLoggable(level);
+    }
+
+    @Override
+    public boolean isEnabled() {
+        final PlatformLogger.Bridge platformProxy = platformProxy();
+        return platformProxy == null || platformProxy.isEnabled();
+    }
+
+    @Override
+    public void log(PlatformLogger.Level level, String msg) {
+        final PlatformLogger.Bridge platformProxy = platformProxy();
+        if (platformProxy == null)  {
+            wrapped().log(level.systemLevel(), msg);
+        } else {
+            platformProxy.log(level, msg);
+        }
+    }
+
+    @Override
+    public void log(PlatformLogger.Level level, String msg, Throwable thrown) {
+        final PlatformLogger.Bridge platformProxy = platformProxy();
+        if (platformProxy == null)  {
+            wrapped().log(level.systemLevel(), msg, thrown);
+        } else {
+            platformProxy.log(level, msg, thrown);
+        }
+    }
+
+    @Override
+    public void log(PlatformLogger.Level level, String msg, Object... params) {
+        final PlatformLogger.Bridge platformProxy = platformProxy();
+        if (platformProxy == null)  {
+            wrapped().log(level.systemLevel(), msg, params);
+        } else {
+            platformProxy.log(level, msg, params);
+        }
+    }
+
+    @Override
+    public void log(PlatformLogger.Level level, Supplier<String> msgSupplier) {
+        final PlatformLogger.Bridge platformProxy = platformProxy();
+        if (platformProxy == null)  {
+            wrapped().log(level.systemLevel(),msgSupplier);
+        } else {
+            platformProxy.log(level,msgSupplier);
+        }
+    }
+
+    @Override
+    public void log(PlatformLogger.Level level, Throwable thrown,
+                    Supplier<String> msgSupplier) {
+        final PlatformLogger.Bridge platformProxy = platformProxy();
+        if (platformProxy == null)  {
+            wrapped().log(level.systemLevel(), msgSupplier, thrown);
+        } else {
+            platformProxy.log(level, thrown, msgSupplier);
+        }
+    }
+
+    @Override
+    public void logp(PlatformLogger.Level level, String sourceClass,
+                     String sourceMethod, String msg) {
+        final PlatformLogger.Bridge platformProxy = platformProxy();
+        if (platformProxy == null)  {
+            if (sourceClass == null && sourceMethod == null) { // best effort
+                wrapped().log(level.systemLevel(), msg);
+            } else {
+                Level systemLevel = level.systemLevel();
+                Logger wrapped = wrapped();
+                if (wrapped.isLoggable(systemLevel)) {
+                    sourceClass  = sourceClass  == null ? "" : sourceClass;
+                    sourceMethod = sourceMethod == null ? "" : sourceMethod;
+                    msg = msg == null ? "" : msg;
+                    wrapped.log(systemLevel, String.format("[%s %s] %s",
+                            sourceClass, sourceMethod, msg));
+                }
+            }
+        } else {
+            platformProxy.logp(level, sourceClass, sourceMethod, msg);
+        }
+    }
+
+    @Override
+    public void logp(PlatformLogger.Level level, String sourceClass,
+                     String sourceMethod, Supplier<String> msgSupplier) {
+        final PlatformLogger.Bridge platformProxy = platformProxy();
+        if (platformProxy == null) { // best effort
+            if (sourceClass == null && sourceMethod == null) {
+                wrapped().log(level.systemLevel(), msgSupplier);
+            } else {
+                Level systemLevel = level.systemLevel();
+                Logger wrapped = wrapped();
+                if (wrapped.isLoggable(systemLevel)) {
+                    final String sClass  = sourceClass  == null ? "" : sourceClass;
+                    final String sMethod = sourceMethod == null ? "" : sourceMethod;
+                    wrapped.log(systemLevel, () -> String.format("[%s %s] %s",
+                            sClass, sMethod, msgSupplier.get()));
+                }
+            }
+        } else {
+            platformProxy.logp(level, sourceClass, sourceMethod, msgSupplier);
+        }
+    }
+
+    @Override
+    public void logp(PlatformLogger.Level level, String sourceClass,
+                     String sourceMethod, String msg, Object... params) {
+        final PlatformLogger.Bridge platformProxy = platformProxy();
+        if (platformProxy == null) { // best effort
+            if (sourceClass == null && sourceMethod == null) {
+                wrapped().log(level.systemLevel(), msg, params);
+            } else {
+                Level systemLevel = level.systemLevel();
+                Logger wrapped = wrapped();
+                if (wrapped.isLoggable(systemLevel)) {
+                    sourceClass  = sourceClass  == null ? "" : sourceClass;
+                    sourceMethod = sourceMethod == null ? "" : sourceMethod;
+                    msg = msg == null ? "" : msg;
+                    wrapped.log(systemLevel, String.format("[%s %s] %s",
+                            sourceClass, sourceMethod, msg), params);
+                }
+            }
+        } else {
+            platformProxy.logp(level, sourceClass, sourceMethod, msg, params);
+        }
+    }
+
+    @Override
+    public void logp(PlatformLogger.Level level, String sourceClass,
+                     String sourceMethod, String msg, Throwable thrown) {
+        final PlatformLogger.Bridge platformProxy = platformProxy();
+        if (platformProxy == null) { // best effort
+            if (sourceClass == null && sourceMethod == null) {
+                wrapped().log(level.systemLevel(), msg, thrown);
+            } else {
+                Level systemLevel = level.systemLevel();
+                Logger wrapped = wrapped();
+                if (wrapped.isLoggable(systemLevel)) {
+                    sourceClass  = sourceClass  == null ? "" : sourceClass;
+                    sourceMethod = sourceMethod == null ? "" : sourceMethod;
+                    msg = msg == null ? "" : msg;
+                    wrapped.log(systemLevel, String.format("[%s %s] %s",
+                            sourceClass, sourceMethod, msg), thrown);
+                }
+            }
+        } else {
+            platformProxy.logp(level, sourceClass, sourceMethod, msg, thrown);
+        }
+    }
+
+    @Override
+    public void logp(PlatformLogger.Level level, String sourceClass,
+                     String sourceMethod, Throwable thrown,
+                     Supplier<String> msgSupplier) {
+        final PlatformLogger.Bridge platformProxy = platformProxy();
+        if (platformProxy == null)  { // best effort
+            if (sourceClass == null && sourceMethod == null) {
+                wrapped().log(level.systemLevel(), msgSupplier, thrown);
+            } else {
+                Level systemLevel = level.systemLevel();
+                Logger wrapped = wrapped();
+                if (wrapped.isLoggable(systemLevel)) {
+                    final String sClass  = sourceClass  == null ? "" : sourceClass;
+                    final String sMethod = sourceMethod == null ? "" : sourceMethod;
+                    wrapped.log(systemLevel,  () -> String.format("[%s %s] %s",
+                            sClass, sMethod, msgSupplier.get()), thrown);
+                }
+            }
+        } else {
+            platformProxy.logp(level, sourceClass, sourceMethod,
+                               thrown, msgSupplier);
+        }
+    }
+
+    @Override
+    public void logrb(PlatformLogger.Level level, String sourceClass,
+                      String sourceMethod, ResourceBundle bundle,
+                      String msg, Object... params) {
+        final PlatformLogger.Bridge platformProxy = platformProxy();
+        if (platformProxy == null)  { // best effort
+            if (bundle != null || sourceClass == null && sourceMethod == null) {
+                wrapped().log(level.systemLevel(), bundle, msg, params);
+            } else {
+                Level systemLevel = level.systemLevel();
+                Logger wrapped = wrapped();
+                if (wrapped.isLoggable(systemLevel)) {
+                    sourceClass  = sourceClass  == null ? "" : sourceClass;
+                    sourceMethod = sourceMethod == null ? "" : sourceMethod;
+                    msg = msg == null ? "" : msg;
+                    wrapped.log(systemLevel, bundle, String.format("[%s %s] %s",
+                            sourceClass, sourceMethod, msg), params);
+                }
+            }
+        } else {
+            platformProxy.logrb(level, sourceClass, sourceMethod,
+                    bundle, msg, params);
+        }
+    }
+
+    @Override
+    public void logrb(PlatformLogger.Level level, String sourceClass,
+                      String sourceMethod, ResourceBundle bundle, String msg,
+                      Throwable thrown) {
+        final PlatformLogger.Bridge platformProxy = platformProxy();
+        if (platformProxy == null)  { // best effort
+            if (bundle != null || sourceClass == null && sourceMethod == null) {
+                wrapped().log(level.systemLevel(), bundle, msg, thrown);
+            } else {
+                Level systemLevel = level.systemLevel();
+                Logger wrapped = wrapped();
+                if (wrapped.isLoggable(systemLevel)) {
+                    sourceClass  = sourceClass  == null ? "" : sourceClass;
+                    sourceMethod = sourceMethod == null ? "" : sourceMethod;
+                    msg = msg == null ? "" : msg;
+                    wrapped.log(systemLevel, bundle, String.format("[%s %s] %s",
+                            sourceClass, sourceMethod, msg), thrown);
+                }
+            }
+        } else {
+            platformProxy.logrb(level, sourceClass, sourceMethod, bundle,
+                                msg, thrown);
+        }
+    }
+
+    @Override
+    public void logrb(PlatformLogger.Level level, ResourceBundle bundle,
+                      String msg, Throwable thrown) {
+        final PlatformLogger.Bridge platformProxy = platformProxy();
+        if (platformProxy == null)  {
+            wrapped().log(level.systemLevel(), bundle, msg, thrown);
+        } else {
+            platformProxy.logrb(level, bundle, msg, thrown);
+        }
+    }
+
+    @Override
+    public void logrb(PlatformLogger.Level level, ResourceBundle bundle,
+                      String msg, Object... params) {
+        final PlatformLogger.Bridge platformProxy = platformProxy();
+        if (platformProxy == null)  {
+            wrapped().log(level.systemLevel(), bundle, msg, params);
+        } else {
+            platformProxy.logrb(level, bundle, msg, params);
+        }
+    }
+
+
+    @Override
+    public LoggerConfiguration getLoggerConfiguration() {
+        final PlatformLogger.Bridge platformProxy = platformProxy();
+        return platformProxy == null ? null
+               : PlatformLogger.ConfigurableBridge
+                       .getLoggerConfiguration(platformProxy);
+    }
+
+}
diff --git a/tests/test_data/std/jdk/internal/logger/BootstrapLogger$BootstrapExecutors$1.class b/tests/test_data/std/jdk/internal/logger/BootstrapLogger$BootstrapExecutors$1.class
new file mode 100644
index 0000000000000000000000000000000000000000..244c455040f856654a043da3bcedf9879922a3be
GIT binary patch
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diff --git a/tests/test_data/std/jdk/internal/logger/BootstrapLogger$BootstrapExecutors$BootstrapMessageLoggerTask.class b/tests/test_data/std/jdk/internal/logger/BootstrapLogger$BootstrapExecutors$BootstrapMessageLoggerTask.class
new file mode 100644
index 0000000000000000000000000000000000000000..502d6dee5ce76b37f40a02889e3e386b75fe6954
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diff --git a/tests/test_data/std/jdk/internal/logger/BootstrapLogger$BootstrapExecutors.class b/tests/test_data/std/jdk/internal/logger/BootstrapLogger$BootstrapExecutors.class
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diff --git a/tests/test_data/std/jdk/internal/logger/BootstrapLogger$DetectBackend$1.class b/tests/test_data/std/jdk/internal/logger/BootstrapLogger$DetectBackend$1.class
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diff --git a/tests/test_data/std/jdk/internal/logger/BootstrapLogger$DetectBackend.class b/tests/test_data/std/jdk/internal/logger/BootstrapLogger$DetectBackend.class
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diff --git a/tests/test_data/std/jdk/internal/logger/BootstrapLogger$LogEvent.class b/tests/test_data/std/jdk/internal/logger/BootstrapLogger$LogEvent.class
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diff --git a/tests/test_data/std/jdk/internal/logger/BootstrapLogger.java b/tests/test_data/std/jdk/internal/logger/BootstrapLogger.java
new file mode 100644
index 00000000..f351b529
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/logger/BootstrapLogger.java
@@ -0,0 +1,1105 @@
+/*
+ * Copyright (c) 2015, 2023, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package jdk.internal.logger;
+
+import java.security.AccessControlContext;
+import java.security.AccessController;
+import java.security.PrivilegedAction;
+import java.util.HashMap;
+import java.util.Iterator;
+import java.util.Map;
+import java.util.ResourceBundle;
+import java.util.ServiceLoader;
+import java.util.function.BooleanSupplier;
+import java.util.function.Function;
+import java.util.function.Supplier;
+import java.lang.System.LoggerFinder;
+import java.lang.System.Logger;
+import java.lang.ref.WeakReference;
+import java.util.Objects;
+import java.util.concurrent.ExecutionException;
+import java.util.concurrent.ExecutorService;
+import java.util.concurrent.LinkedBlockingQueue;
+import java.util.concurrent.ThreadFactory;
+import java.util.concurrent.ThreadPoolExecutor;
+import java.util.concurrent.TimeUnit;
+import jdk.internal.misc.InnocuousThread;
+import jdk.internal.misc.VM;
+import sun.util.logging.PlatformLogger;
+import jdk.internal.logger.LazyLoggers.LazyLoggerAccessor;
+
+/**
+ * The BootstrapLogger class handles all the logic needed by Lazy Loggers
+ * to delay the creation of System.Logger instances until the VM is booted.
+ * By extension - it also contains the logic that will delay the creation
+ * of JUL Loggers until the LogManager is initialized by the application, in
+ * the common case where JUL is the default and there is no custom JUL
+ * configuration.
+ *
+ * A BootstrapLogger instance is both a Logger and a
+ * PlatformLogger.Bridge instance, which will put all Log messages in a queue
+ * until the VM is booted.
+ * Once the VM is booted, it obtain the real System.Logger instance from the
+ * LoggerFinder and flushes the message to the queue.
+ *
+ * There are a few caveat:
+ *  - the queue may not be flush until the next message is logged after
+ *    the VM is booted
+ *  - while the BootstrapLogger is active, the default implementation
+ *    for all convenience methods is used
+ *  - PlatformLogger.setLevel calls are ignored
+ *
+ *
+ */
+public final class BootstrapLogger implements Logger, PlatformLogger.Bridge,
+        PlatformLogger.ConfigurableBridge {
+
+    // We use the BootstrapExecutors class to submit delayed messages
+    // to an independent InnocuousThread which will ensure that
+    // delayed log events will be clearly identified as messages that have
+    // been delayed during the boot sequence.
+    private static class BootstrapExecutors implements ThreadFactory {
+
+        // Maybe that should be made configurable with system properties.
+        static final long KEEP_EXECUTOR_ALIVE_SECONDS = 30;
+
+        // The BootstrapMessageLoggerTask is a Runnable which keeps
+        // a hard ref to the ExecutorService that owns it.
+        // This ensure that the ExecutorService is not gc'ed until the thread
+        // has stopped running.
+        private static class BootstrapMessageLoggerTask implements Runnable {
+            ExecutorService owner;
+            Runnable run;
+            public BootstrapMessageLoggerTask(ExecutorService owner, Runnable r) {
+                this.owner = owner;
+                this.run = r;
+            }
+            @Override
+            public void run() {
+                try {
+                    run.run();
+                } finally {
+                    owner = null; // allow the ExecutorService to be gced.
+                }
+            }
+        }
+
+        private static volatile WeakReference<ExecutorService> executorRef;
+        private static ExecutorService getExecutor() {
+            WeakReference<ExecutorService> ref = executorRef;
+            ExecutorService executor = ref == null ? null : ref.get();
+            if (executor != null) return executor;
+            synchronized (BootstrapExecutors.class) {
+                ref = executorRef;
+                executor = ref == null ? null : ref.get();
+                if (executor == null) {
+                    executor = new ThreadPoolExecutor(0, 1,
+                            KEEP_EXECUTOR_ALIVE_SECONDS, TimeUnit.SECONDS,
+                            new LinkedBlockingQueue<>(), new BootstrapExecutors());
+                }
+                // The executor service will be elligible for gc
+                // KEEP_EXECUTOR_ALIVE_SECONDS seconds (30s)
+                // after the execution of its last pending task.
+                executorRef = new WeakReference<>(executor);
+                return executorRef.get();
+            }
+        }
+
+        @Override
+        public Thread newThread(Runnable r) {
+            ExecutorService owner = getExecutor();
+            @SuppressWarnings("removal")
+            Thread thread = AccessController.doPrivileged(new PrivilegedAction<Thread>() {
+                @Override
+                public Thread run() {
+                    Thread t = InnocuousThread.newThread(new BootstrapMessageLoggerTask(owner, r));
+                    t.setName("BootstrapMessageLoggerTask-"+t.getName());
+                    return t;
+                }
+            }, null, new RuntimePermission("enableContextClassLoaderOverride"));
+            thread.setDaemon(true);
+            return thread;
+        }
+
+        static void submit(Runnable r) {
+            getExecutor().execute(r);
+        }
+
+        // This is used by tests.
+        static void join(Runnable r) {
+            try {
+                getExecutor().submit(r).get();
+            } catch (InterruptedException | ExecutionException ex) {
+                // should not happen
+                throw new RuntimeException(ex);
+            }
+        }
+
+        // This is used by tests.
+        static void awaitPendingTasks() {
+            WeakReference<ExecutorService> ref = executorRef;
+            ExecutorService executor = ref == null ? null : ref.get();
+            if (ref == null) {
+                synchronized(BootstrapExecutors.class) {
+                    ref = executorRef;
+                    executor = ref == null ? null : ref.get();
+                }
+            }
+            if (executor != null) {
+                // since our executor uses a FIFO and has a single thread
+                // then awaiting the execution of its pending tasks can be done
+                // simply by registering a new task and waiting until it
+                // completes. This of course would not work if we were using
+                // several threads, but we don't.
+                join(()->{});
+            }
+        }
+
+        // This is used by tests.
+        static boolean isAlive() {
+            WeakReference<ExecutorService> ref = executorRef;
+            if (ref != null && !ref.refersTo(null)) return true;
+            synchronized (BootstrapExecutors.class) {
+                ref = executorRef;
+                return ref != null && !ref.refersTo(null);
+            }
+        }
+
+        // The pending log event queue. The first event is the head, and
+        // new events are added at the tail
+        static LogEvent head, tail;
+
+        static void enqueue(LogEvent event) {
+            if (event.next != null) return;
+            synchronized (BootstrapExecutors.class) {
+                if (event.next != null) return;
+                event.next = event;
+                if (tail == null) {
+                    head = tail = event;
+                } else {
+                    tail.next = event;
+                    tail = event;
+                }
+            }
+        }
+
+        static void flush() {
+            LogEvent event;
+            // drain the whole queue
+            synchronized(BootstrapExecutors.class) {
+                event = head;
+                head = tail = null;
+            }
+            while(event != null) {
+                LogEvent.log(event);
+                synchronized(BootstrapExecutors.class) {
+                    LogEvent prev = event;
+                    event = (event.next == event ? null : event.next);
+                    prev.next = null;
+                }
+            }
+        }
+    }
+
+    // The accessor in which this logger is temporarily set.
+    final LazyLoggerAccessor holder;
+    // tests whether the logger is invoked by the loading thread before
+    // the LoggerFinder is loaded; can be null;
+    final BooleanSupplier isLoadingThread;
+
+    // returns true if the logger is invoked by the loading thread before the
+    // LoggerFinder service is loaded
+    boolean isLoadingThread() {
+        return isLoadingThread != null && isLoadingThread.getAsBoolean();
+    }
+
+    BootstrapLogger(LazyLoggerAccessor holder, BooleanSupplier isLoadingThread) {
+        this.holder = holder;
+        this.isLoadingThread = isLoadingThread;
+    }
+
+    // Temporary data object storing log events
+    // It would be nice to use a Consumer<Logger> instead of a LogEvent.
+    // This way we could simply do things like:
+    //    push((logger) -> logger.log(level, msg));
+    // Unfortunately, if we come to here it means we are in the bootsraping
+    // phase where using lambdas is not safe yet - so we have to use
+    // a data object instead...
+    //
+    static final class LogEvent {
+        // only one of these two levels should be non null
+        final Level level;
+        final PlatformLogger.Level platformLevel;
+        final BootstrapLogger bootstrap;
+
+        final ResourceBundle bundle;
+        final String msg;
+        final Throwable thrown;
+        final Object[] params;
+        final Supplier<String> msgSupplier;
+        final String sourceClass;
+        final String sourceMethod;
+        final long timeMillis;
+        final long nanoAdjustment;
+
+        // because logging a message may entail calling toString() on
+        // the parameters etc... we need to store the context of the
+        // caller who logged the message - so that we can reuse it when
+        // we finally log the message.
+        @SuppressWarnings("removal")
+        final AccessControlContext acc;
+
+        // The next event in the queue
+        LogEvent next;
+
+        @SuppressWarnings("removal")
+        private LogEvent(BootstrapLogger bootstrap, Level level,
+                ResourceBundle bundle, String msg,
+                Throwable thrown, Object[] params) {
+            this.acc = AccessController.getContext();
+            this.timeMillis = System.currentTimeMillis();
+            this.nanoAdjustment = VM.getNanoTimeAdjustment(timeMillis);
+            this.level = level;
+            this.platformLevel = null;
+            this.bundle = bundle;
+            this.msg = msg;
+            this.msgSupplier = null;
+            this.thrown = thrown;
+            this.params = params;
+            this.sourceClass = null;
+            this.sourceMethod = null;
+            this.bootstrap = bootstrap;
+        }
+
+        @SuppressWarnings("removal")
+        private LogEvent(BootstrapLogger bootstrap, Level level,
+                Supplier<String> msgSupplier,
+                Throwable thrown, Object[] params) {
+            this.acc = AccessController.getContext();
+            this.timeMillis = System.currentTimeMillis();
+            this.nanoAdjustment = VM.getNanoTimeAdjustment(timeMillis);
+            this.level = level;
+            this.platformLevel = null;
+            this.bundle = null;
+            this.msg = null;
+            this.msgSupplier = msgSupplier;
+            this.thrown = thrown;
+            this.params = params;
+            this.sourceClass = null;
+            this.sourceMethod = null;
+            this.bootstrap = bootstrap;
+        }
+
+        @SuppressWarnings("removal")
+        private LogEvent(BootstrapLogger bootstrap,
+                PlatformLogger.Level platformLevel,
+                String sourceClass, String sourceMethod,
+                ResourceBundle bundle, String msg,
+                Throwable thrown, Object[] params) {
+            this.acc = AccessController.getContext();
+            this.timeMillis = System.currentTimeMillis();
+            this.nanoAdjustment = VM.getNanoTimeAdjustment(timeMillis);
+            this.level = null;
+            this.platformLevel = platformLevel;
+            this.bundle = bundle;
+            this.msg = msg;
+            this.msgSupplier = null;
+            this.thrown = thrown;
+            this.params = params;
+            this.sourceClass = sourceClass;
+            this.sourceMethod = sourceMethod;
+            this.bootstrap = bootstrap;
+        }
+
+        @SuppressWarnings("removal")
+        private LogEvent(BootstrapLogger bootstrap,
+                PlatformLogger.Level platformLevel,
+                String sourceClass, String sourceMethod,
+                Supplier<String> msgSupplier,
+                Throwable thrown, Object[] params) {
+            this.acc = AccessController.getContext();
+            this.timeMillis = System.currentTimeMillis();
+            this.nanoAdjustment = VM.getNanoTimeAdjustment(timeMillis);
+            this.level = null;
+            this.platformLevel = platformLevel;
+            this.bundle = null;
+            this.msg = null;
+            this.msgSupplier = msgSupplier;
+            this.thrown = thrown;
+            this.params = params;
+            this.sourceClass = sourceClass;
+            this.sourceMethod = sourceMethod;
+            this.bootstrap = bootstrap;
+        }
+
+        // Log this message in the given logger. Do not call directly.
+        // Use LogEvent.log(LogEvent, logger) instead.
+        private void log(Logger logger) {
+            assert platformLevel == null && level != null;
+            //new Exception("logging delayed message").printStackTrace();
+            if (msgSupplier != null) {
+                if (thrown != null) {
+                    logger.log(level, msgSupplier, thrown);
+                } else {
+                    logger.log(level, msgSupplier);
+                }
+            } else {
+                // BootstrapLoggers are never localized so we can safely
+                // use the method that takes a ResourceBundle parameter
+                // even when that resource bundle is null.
+                if (thrown != null) {
+                    logger.log(level, bundle, msg, thrown);
+                } else {
+                    logger.log(level, bundle, msg, params);
+                }
+            }
+        }
+
+        // Log this message in the given logger.  Do not call directly.
+        // Use LogEvent.doLog(LogEvent, logger) instead.
+        private void log(PlatformLogger.Bridge logger) {
+            assert platformLevel != null && level == null;
+            if (sourceClass == null) {
+                if (msgSupplier != null) {
+                    if (thrown != null) {
+                        logger.log(platformLevel, thrown, msgSupplier);
+                    } else {
+                        logger.log(platformLevel, msgSupplier);
+                    }
+                } else {
+                    // BootstrapLoggers are never localized so we can safely
+                    // use the method that takes a ResourceBundle parameter
+                    // even when that resource bundle is null.
+                    if (thrown != null) {
+                        logger.logrb(platformLevel, bundle, msg, thrown);
+                    } else {
+                        logger.logrb(platformLevel, bundle, msg, params);
+                    }
+                }
+            } else {
+                if (msgSupplier != null) {
+                    if (thrown != null) {
+                        logger.logp(platformLevel, sourceClass, sourceMethod, thrown, msgSupplier);
+                    } else {
+                        logger.logp(platformLevel, sourceClass, sourceMethod, msgSupplier);
+                    }
+                } else {
+                    // BootstrapLoggers are never localized so we can safely
+                    // use the method that takes a ResourceBundle parameter
+                    // even when that resource bundle is null.
+                    if (thrown != null) {
+                        logger.logrb(platformLevel, sourceClass, sourceMethod, bundle, msg, thrown);
+                    } else {
+                        logger.logrb(platformLevel, sourceClass, sourceMethod, bundle, msg, params);
+                    }
+                }
+            }
+        }
+
+        // non default methods from Logger interface
+        static LogEvent valueOf(BootstrapLogger bootstrap, Level level,
+                ResourceBundle bundle, String key, Throwable thrown) {
+            return new LogEvent(Objects.requireNonNull(bootstrap),
+                                Objects.requireNonNull(level), bundle, key,
+                                thrown, null);
+        }
+        static LogEvent valueOf(BootstrapLogger bootstrap, Level level,
+                ResourceBundle bundle, String format, Object[] params) {
+            return new LogEvent(Objects.requireNonNull(bootstrap),
+                                Objects.requireNonNull(level), bundle, format,
+                                null, params);
+        }
+        static LogEvent valueOf(BootstrapLogger bootstrap, Level level,
+                                Supplier<String> msgSupplier, Throwable thrown) {
+            return new LogEvent(Objects.requireNonNull(bootstrap),
+                    Objects.requireNonNull(level),
+                    Objects.requireNonNull(msgSupplier), thrown, null);
+        }
+        static LogEvent valueOf(BootstrapLogger bootstrap, Level level,
+                                Supplier<String> msgSupplier) {
+            return new LogEvent(Objects.requireNonNull(bootstrap),
+                                Objects.requireNonNull(level),
+                                Objects.requireNonNull(msgSupplier), null, null);
+        }
+        @SuppressWarnings("removal")
+        static void log(LogEvent log, Logger logger) {
+            final SecurityManager sm = System.getSecurityManager();
+            // not sure we can actually use lambda here. We may need to create
+            // an anonymous class. Although if we reach here, then it means
+            // the VM is booted.
+            if (sm == null || log.acc == null) {
+                BootstrapExecutors.submit(() -> log.log(logger));
+            } else {
+                BootstrapExecutors.submit(() ->
+                    AccessController.doPrivileged((PrivilegedAction<Void>) () -> {
+                        log.log(logger); return null;
+                    }, log.acc));
+            }
+        }
+
+        // non default methods from PlatformLogger.Bridge interface
+        static LogEvent valueOf(BootstrapLogger bootstrap,
+                                PlatformLogger.Level level, String msg) {
+            return new LogEvent(Objects.requireNonNull(bootstrap),
+                                Objects.requireNonNull(level), null, null, null,
+                                msg, null, null);
+        }
+        static LogEvent valueOf(BootstrapLogger bootstrap, PlatformLogger.Level level,
+                                String msg, Throwable thrown) {
+            return new LogEvent(Objects.requireNonNull(bootstrap),
+                    Objects.requireNonNull(level), null, null, null, msg, thrown, null);
+        }
+        static LogEvent valueOf(BootstrapLogger bootstrap, PlatformLogger.Level level,
+                                String msg, Object[] params) {
+            return new LogEvent(Objects.requireNonNull(bootstrap),
+                    Objects.requireNonNull(level), null, null, null, msg, null, params);
+        }
+        static LogEvent valueOf(BootstrapLogger bootstrap, PlatformLogger.Level level,
+                                Supplier<String> msgSupplier) {
+            return new LogEvent(Objects.requireNonNull(bootstrap),
+                    Objects.requireNonNull(level), null, null, msgSupplier, null, null);
+        }
+        static LogEvent vaueOf(BootstrapLogger bootstrap, PlatformLogger.Level level,
+                               Supplier<String> msgSupplier,
+                               Throwable thrown) {
+            return new LogEvent(Objects.requireNonNull(bootstrap),
+                                Objects.requireNonNull(level), null, null,
+                                msgSupplier, thrown, null);
+        }
+        static LogEvent valueOf(BootstrapLogger bootstrap, PlatformLogger.Level level,
+                                String sourceClass, String sourceMethod,
+                                ResourceBundle bundle, String msg, Object[] params) {
+            return new LogEvent(Objects.requireNonNull(bootstrap),
+                                Objects.requireNonNull(level), sourceClass,
+                                sourceMethod, bundle, msg, null, params);
+        }
+        static LogEvent valueOf(BootstrapLogger bootstrap, PlatformLogger.Level level,
+                                String sourceClass, String sourceMethod,
+                                ResourceBundle bundle, String msg, Throwable thrown) {
+            return new LogEvent(Objects.requireNonNull(bootstrap),
+                                Objects.requireNonNull(level), sourceClass,
+                                sourceMethod, bundle, msg, thrown, null);
+        }
+        static LogEvent valueOf(BootstrapLogger bootstrap, PlatformLogger.Level level,
+                                String sourceClass, String sourceMethod,
+                                Supplier<String> msgSupplier, Throwable thrown) {
+            return new LogEvent(Objects.requireNonNull(bootstrap),
+                                Objects.requireNonNull(level), sourceClass,
+                                sourceMethod, msgSupplier, thrown, null);
+        }
+        @SuppressWarnings("removal")
+        static void log(LogEvent log, PlatformLogger.Bridge logger) {
+            final SecurityManager sm = System.getSecurityManager();
+            if (sm == null || log.acc == null) {
+                BootstrapExecutors.submit(() -> log.log(logger));
+            } else {
+                // not sure we can actually use lambda here. We may need to create
+                // an anonymous class. Although if we reach here, then it means
+                // the VM is booted.
+                BootstrapExecutors.submit(() ->
+                    AccessController.doPrivileged((PrivilegedAction<Void>) () -> {
+                        log.log(logger); return null;
+                }, log.acc));
+            }
+        }
+
+        static void log(LogEvent event) {
+            event.bootstrap.flush(event);
+        }
+
+    }
+
+    // Push a log event at the end of the pending LogEvent queue.
+    void push(LogEvent log) {
+        BootstrapExecutors.enqueue(log);
+        // if the queue has been flushed just before we entered
+        // the synchronized block we need to flush it again.
+        checkBootstrapping();
+    }
+
+    // Flushes the queue of pending LogEvents to the logger.
+    void flush(LogEvent event) {
+        assert event.bootstrap == this;
+        if (event.platformLevel != null) {
+            PlatformLogger.Bridge concrete = holder.getConcretePlatformLogger(this);
+            LogEvent.log(event, concrete);
+        } else {
+            Logger concrete = holder.getConcreteLogger(this);
+            LogEvent.log(event, concrete);
+        }
+    }
+
+    /**
+     * The name of this logger. This is the name of the actual logger for which
+     * this logger acts as a temporary proxy.
+     * @return The logger name.
+     */
+    @Override
+    public String getName() {
+        return holder.name;
+    }
+
+    /**
+     * Check whether the VM is still bootstrapping, and if not, arranges
+     * for this logger's holder to create the real logger and flush the
+     * pending event queue.
+     * @return true if the VM is still bootstrapping.
+     */
+    boolean checkBootstrapping() {
+        if (isBooted() && !isLoadingThread()) {
+            BootstrapExecutors.flush();
+            holder.getConcreteLogger(this);
+            return false;
+        }
+        return true;
+    }
+
+    // ----------------------------------
+    // Methods from Logger
+    // ----------------------------------
+
+    @Override
+    public boolean isLoggable(Level level) {
+        if (checkBootstrapping()) {
+            return level.getSeverity() >= Level.INFO.getSeverity();
+        } else {
+            final Logger spi = holder.wrapped();
+            return spi.isLoggable(level);
+        }
+    }
+
+    @Override
+    public void log(Level level, ResourceBundle bundle, String key, Throwable thrown) {
+        if (checkBootstrapping()) {
+            push(LogEvent.valueOf(this, level, bundle, key, thrown));
+        } else {
+            final Logger spi = holder.wrapped();
+            spi.log(level, bundle, key, thrown);
+        }
+    }
+
+    @Override
+    public void log(Level level, ResourceBundle bundle, String format, Object... params) {
+        if (checkBootstrapping()) {
+            push(LogEvent.valueOf(this, level, bundle, format, params));
+        } else {
+            final Logger spi = holder.wrapped();
+            spi.log(level, bundle, format, params);
+        }
+    }
+
+    @Override
+    public void log(Level level, String msg, Throwable thrown) {
+        if (checkBootstrapping()) {
+            push(LogEvent.valueOf(this, level, null, msg, thrown));
+        } else {
+            final Logger spi = holder.wrapped();
+            spi.log(level, msg, thrown);
+        }
+    }
+
+    @Override
+    public void log(Level level, String format, Object... params) {
+        if (checkBootstrapping()) {
+            push(LogEvent.valueOf(this, level, null, format, params));
+        } else {
+            final Logger spi = holder.wrapped();
+            spi.log(level, format, params);
+        }
+    }
+
+    @Override
+    public void log(Level level, Supplier<String> msgSupplier) {
+        if (checkBootstrapping()) {
+            push(LogEvent.valueOf(this, level, msgSupplier));
+        } else {
+            final Logger spi = holder.wrapped();
+            spi.log(level, msgSupplier);
+        }
+    }
+
+    @Override
+    public void log(Level level, Object obj) {
+        if (checkBootstrapping()) {
+            Logger.super.log(level, obj);
+        } else {
+            final Logger spi = holder.wrapped();
+            spi.log(level, obj);
+        }
+    }
+
+    @Override
+    public void log(Level level, String msg) {
+        if (checkBootstrapping()) {
+            push(LogEvent.valueOf(this, level, null, msg, (Object[])null));
+        } else {
+            final Logger spi = holder.wrapped();
+            spi.log(level, msg);
+        }
+    }
+
+    @Override
+    public void log(Level level, Supplier<String> msgSupplier, Throwable thrown) {
+        if (checkBootstrapping()) {
+            push(LogEvent.valueOf(this, level, msgSupplier, thrown));
+        } else {
+            final Logger spi = holder.wrapped();
+            spi.log(level, msgSupplier, thrown);
+        }
+    }
+
+    // ----------------------------------
+    // Methods from PlatformLogger.Bridge
+    // ----------------------------------
+
+    @Override
+    public boolean isLoggable(PlatformLogger.Level level) {
+        if (checkBootstrapping()) {
+            return level.intValue() >= PlatformLogger.Level.INFO.intValue();
+        } else {
+            final PlatformLogger.Bridge spi = holder.platform();
+            return spi.isLoggable(level);
+        }
+    }
+
+    @Override
+    public boolean isEnabled() {
+        if (checkBootstrapping()) {
+            return true;
+        } else {
+            final PlatformLogger.Bridge spi = holder.platform();
+            return spi.isEnabled();
+        }
+    }
+
+    @Override
+    public void log(PlatformLogger.Level level, String msg) {
+        if (checkBootstrapping()) {
+            push(LogEvent.valueOf(this, level, msg));
+        } else {
+            final PlatformLogger.Bridge spi = holder.platform();
+            spi.log(level, msg);
+        }
+    }
+
+    @Override
+    public void log(PlatformLogger.Level level, String msg, Throwable thrown) {
+        if (checkBootstrapping()) {
+            push(LogEvent.valueOf(this, level, msg, thrown));
+        } else {
+            final PlatformLogger.Bridge spi = holder.platform();
+            spi.log(level, msg, thrown);
+        }
+    }
+
+    @Override
+    public void log(PlatformLogger.Level level, String msg, Object... params) {
+        if (checkBootstrapping()) {
+            push(LogEvent.valueOf(this, level, msg, params));
+        } else {
+            final PlatformLogger.Bridge spi = holder.platform();
+            spi.log(level, msg, params);
+        }
+    }
+
+    @Override
+    public void log(PlatformLogger.Level level, Supplier<String> msgSupplier) {
+        if (checkBootstrapping()) {
+            push(LogEvent.valueOf(this, level, msgSupplier));
+        } else {
+            final PlatformLogger.Bridge spi = holder.platform();
+            spi.log(level, msgSupplier);
+        }
+    }
+
+    @Override
+    public void log(PlatformLogger.Level level, Throwable thrown,
+            Supplier<String> msgSupplier) {
+        if (checkBootstrapping()) {
+            push(LogEvent.vaueOf(this, level, msgSupplier, thrown));
+        } else {
+            final PlatformLogger.Bridge spi = holder.platform();
+            spi.log(level, thrown, msgSupplier);
+        }
+    }
+
+    @Override
+    public void logp(PlatformLogger.Level level, String sourceClass,
+            String sourceMethod, String msg) {
+        if (checkBootstrapping()) {
+            push(LogEvent.valueOf(this, level, sourceClass, sourceMethod, null,
+                    msg, (Object[])null));
+        } else {
+            final PlatformLogger.Bridge spi = holder.platform();
+            spi.logp(level, sourceClass, sourceMethod, msg);
+        }
+    }
+
+    @Override
+    public void logp(PlatformLogger.Level level, String sourceClass,
+            String sourceMethod, Supplier<String> msgSupplier) {
+        if (checkBootstrapping()) {
+            push(LogEvent.valueOf(this, level, sourceClass, sourceMethod, msgSupplier, null));
+        } else {
+            final PlatformLogger.Bridge spi = holder.platform();
+            spi.logp(level, sourceClass, sourceMethod, msgSupplier);
+        }
+    }
+
+    @Override
+    public void logp(PlatformLogger.Level level, String sourceClass,
+            String sourceMethod, String msg, Object... params) {
+        if (checkBootstrapping()) {
+            push(LogEvent.valueOf(this, level, sourceClass, sourceMethod, null, msg, params));
+        } else {
+            final PlatformLogger.Bridge spi = holder.platform();
+            spi.logp(level, sourceClass, sourceMethod, msg, params);
+        }
+    }
+
+    @Override
+    public void logp(PlatformLogger.Level level, String sourceClass,
+            String sourceMethod, String msg, Throwable thrown) {
+        if (checkBootstrapping()) {
+            push(LogEvent.valueOf(this, level, sourceClass, sourceMethod, null, msg, thrown));
+        } else {
+            final PlatformLogger.Bridge spi = holder.platform();
+            spi.logp(level, sourceClass, sourceMethod, msg, thrown);
+        }
+    }
+
+    @Override
+    public void logp(PlatformLogger.Level level, String sourceClass,
+            String sourceMethod, Throwable thrown, Supplier<String> msgSupplier) {
+        if (checkBootstrapping()) {
+            push(LogEvent.valueOf(this, level, sourceClass, sourceMethod, msgSupplier, thrown));
+        } else {
+            final PlatformLogger.Bridge spi = holder.platform();
+            spi.logp(level, sourceClass, sourceMethod, thrown, msgSupplier);
+        }
+    }
+
+    @Override
+    public void logrb(PlatformLogger.Level level, String sourceClass,
+            String sourceMethod, ResourceBundle bundle, String msg, Object... params) {
+        if (checkBootstrapping()) {
+            push(LogEvent.valueOf(this, level, sourceClass, sourceMethod, bundle, msg, params));
+        } else {
+            final PlatformLogger.Bridge spi = holder.platform();
+            spi.logrb(level, sourceClass, sourceMethod, bundle, msg, params);
+        }
+    }
+
+    @Override
+    public void logrb(PlatformLogger.Level level, String sourceClass,
+            String sourceMethod, ResourceBundle bundle, String msg, Throwable thrown) {
+        if (checkBootstrapping()) {
+            push(LogEvent.valueOf(this, level, sourceClass, sourceMethod, bundle, msg, thrown));
+        } else {
+            final PlatformLogger.Bridge spi = holder.platform();
+            spi.logrb(level, sourceClass, sourceMethod, bundle, msg, thrown);
+        }
+    }
+
+    @Override
+    public void logrb(PlatformLogger.Level level, ResourceBundle bundle,
+            String msg, Object... params) {
+        if (checkBootstrapping()) {
+            push(LogEvent.valueOf(this, level, null, null, bundle, msg, params));
+        } else {
+            final PlatformLogger.Bridge spi = holder.platform();
+            spi.logrb(level, bundle, msg, params);
+        }
+    }
+
+    @Override
+    public void logrb(PlatformLogger.Level level, ResourceBundle bundle, String msg, Throwable thrown) {
+        if (checkBootstrapping()) {
+            push(LogEvent.valueOf(this, level, null, null, bundle, msg, thrown));
+        } else {
+            final PlatformLogger.Bridge spi = holder.platform();
+            spi.logrb(level, bundle, msg, thrown);
+        }
+    }
+
+    @Override
+    public LoggerConfiguration getLoggerConfiguration() {
+        if (checkBootstrapping()) {
+            // This practically means that PlatformLogger.setLevel()
+            // calls will be ignored if the VM is still bootstrapping. We could
+            // attempt to fix that but is it worth it?
+            return PlatformLogger.ConfigurableBridge.super.getLoggerConfiguration();
+        } else {
+            final PlatformLogger.Bridge spi = holder.platform();
+            return PlatformLogger.ConfigurableBridge.getLoggerConfiguration(spi);
+        }
+    }
+
+    // This BooleanSupplier is a hook for tests - so that we can simulate
+    // what would happen before the VM is booted.
+    private static volatile BooleanSupplier isBooted;
+    public static boolean isBooted() {
+        if (isBooted != null) return isBooted.getAsBoolean();
+        else return VM.isBooted();
+    }
+
+    // A bit of magic. We try to find out the nature of the logging
+    // backend without actually loading it.
+    private static enum LoggingBackend {
+        // There is no LoggerFinder and JUL is not present
+        NONE(true),
+
+        // There is no LoggerFinder, but we have found a
+        // JdkLoggerFinder installed (which means JUL is present),
+        // and we haven't found any custom configuration for JUL.
+        // Until LogManager is initialized we can use a simple console
+        // logger.
+        JUL_DEFAULT(false),
+
+        // Same as above, except that we have found a custom configuration
+        // for JUL. We cannot use the simple console logger in this case.
+        JUL_WITH_CONFIG(true),
+
+        // We have found a custom LoggerFinder.
+        CUSTOM(true);
+
+        final boolean useLoggerFinder;
+        private LoggingBackend(boolean useLoggerFinder) {
+            this.useLoggerFinder = useLoggerFinder;
+        }
+    };
+
+    // The purpose of this class is to delay the initialization of
+    // the detectedBackend field until it is actually read.
+    // We do not want this field to get initialized if VM.isBooted() is false.
+    @SuppressWarnings("removal")
+    private static final class DetectBackend {
+        static final LoggingBackend detectedBackend;
+        static {
+            detectedBackend = AccessController.doPrivileged(new PrivilegedAction<LoggingBackend>() {
+                    @Override
+                    public LoggingBackend run() {
+                        final Iterator<LoggerFinder> iterator =
+                            ServiceLoader.load(LoggerFinder.class, ClassLoader.getSystemClassLoader())
+                            .iterator();
+                        if (iterator.hasNext()) {
+                            return LoggingBackend.CUSTOM; // Custom Logger Provider is registered
+                        }
+                        // No custom logger provider: we will be using the default
+                        // backend.
+                        final Iterator<DefaultLoggerFinder> iterator2 =
+                            ServiceLoader.loadInstalled(DefaultLoggerFinder.class)
+                            .iterator();
+                        if (iterator2.hasNext()) {
+                            // LoggingProviderImpl is registered. The default
+                            // implementation is java.util.logging
+                            String cname = System.getProperty("java.util.logging.config.class");
+                            String fname = System.getProperty("java.util.logging.config.file");
+                            return (cname != null || fname != null)
+                                ? LoggingBackend.JUL_WITH_CONFIG
+                                : LoggingBackend.JUL_DEFAULT;
+                        } else {
+                            // SimpleConsoleLogger is used
+                            return LoggingBackend.NONE;
+                        }
+                    }
+                });
+
+        }
+    }
+
+    // We will use a temporary SurrogateLogger if
+    // the logging backend is JUL, there is no custom config,
+    // and the LogManager has not been initialized yet.
+    private static  boolean useSurrogateLoggers() {
+        // being paranoid: this should already have been checked
+        if (!isBooted()) return true;
+        return DetectBackend.detectedBackend == LoggingBackend.JUL_DEFAULT
+                && !logManagerConfigured;
+    }
+
+    // We will use lazy loggers if:
+    //    - the VM is not yet booted
+    //    - the logging backend is a custom backend
+    //    - the logging backend is JUL, there is no custom config,
+    //      and the LogManager has not been initialized yet.
+    public static boolean useLazyLoggers() {
+        // Note: avoid triggering the initialization of the DetectBackend class
+        // while holding the BootstrapLogger class monitor
+        if (!BootstrapLogger.isBooted() ||
+                DetectBackend.detectedBackend == LoggingBackend.CUSTOM) {
+            return true;
+        }
+        synchronized (BootstrapLogger.class) {
+            return useSurrogateLoggers();
+        }
+    }
+
+    // Called by LazyLoggerAccessor. This method will determine whether
+    // to create a BootstrapLogger (if the VM is not yet booted),
+    // a SurrogateLogger (if JUL is the default backend and there
+    // is no custom JUL configuration and LogManager is not yet initialized),
+    // or a logger returned by the loaded LoggerFinder (all other cases).
+    static Logger getLogger(LazyLoggerAccessor accessor, BooleanSupplier isLoading) {
+        if (!BootstrapLogger.isBooted() || isLoading != null && isLoading.getAsBoolean()) {
+            return new BootstrapLogger(accessor, isLoading);
+        } else {
+            if (useSurrogateLoggers()) {
+                // JUL is the default backend, there is no custom configuration,
+                // LogManager has not been used.
+                synchronized(BootstrapLogger.class) {
+                    if (useSurrogateLoggers()) {
+                        return createSurrogateLogger(accessor);
+                    }
+                }
+            }
+            // Already booted. Return the real logger.
+            return accessor.createLogger();
+        }
+    }
+
+    // trigger class initialization outside of holding lock
+    static void ensureBackendDetected() {
+        assert VM.isBooted() : "VM is not booted";
+        // triggers detection of the backend
+        var backend = DetectBackend.detectedBackend;
+    }
+
+    // If the backend is JUL, and there is no custom configuration, and
+    // nobody has attempted to call LogManager.getLogManager() yet, then
+    // we can temporarily substitute JUL Logger with SurrogateLoggers,
+    // which avoids the cost of actually loading up the LogManager...
+    // The RedirectedLoggers class has the logic to create such surrogate
+    // loggers, and to possibly replace them with real JUL loggers if
+    // someone calls LogManager.getLogManager().
+    static final class RedirectedLoggers implements
+            Function<LazyLoggerAccessor, SurrogateLogger> {
+
+        // all accesses must be synchronized on the outer BootstrapLogger.class
+        final Map<LazyLoggerAccessor, SurrogateLogger> redirectedLoggers =
+                new HashMap<>();
+
+        // all accesses must be synchronized on the outer BootstrapLogger.class
+        // The redirectLoggers map will be cleared when LogManager is initialized.
+        boolean cleared;
+
+        @Override
+        // all accesses must be synchronized on the outer BootstrapLogger.class
+        public SurrogateLogger apply(LazyLoggerAccessor t) {
+            if (cleared) throw new IllegalStateException("LoggerFinder already initialized");
+            return SurrogateLogger.makeSurrogateLogger(t.getLoggerName());
+        }
+
+        // all accesses must be synchronized on the outer BootstrapLogger.class
+        SurrogateLogger get(LazyLoggerAccessor a) {
+            if (cleared) throw new IllegalStateException("LoggerFinder already initialized");
+            return redirectedLoggers.computeIfAbsent(a, this);
+        }
+
+        // all accesses must be synchronized on the outer BootstrapLogger.class
+        Map<LazyLoggerAccessor, SurrogateLogger> drainLoggersMap() {
+            if (redirectedLoggers.isEmpty()) return null;
+            if (cleared) throw new IllegalStateException("LoggerFinder already initialized");
+            final Map<LazyLoggerAccessor, SurrogateLogger> accessors = new HashMap<>(redirectedLoggers);
+            redirectedLoggers.clear();
+            cleared = true;
+            return accessors;
+        }
+
+        static void replaceSurrogateLoggers(Map<LazyLoggerAccessor, SurrogateLogger> accessors) {
+            // When the backend is JUL we want to force the creation of
+            // JUL loggers here: some tests are expecting that the
+            // PlatformLogger will create JUL loggers as soon as the
+            // LogManager is initialized.
+            //
+            // If the backend is not JUL then we can delay the re-creation
+            // of the wrapped logger until they are next accessed.
+            //
+            final LoggingBackend detectedBackend = DetectBackend.detectedBackend;
+            final boolean lazy = detectedBackend != LoggingBackend.JUL_DEFAULT
+                    && detectedBackend != LoggingBackend.JUL_WITH_CONFIG;
+            for (Map.Entry<LazyLoggerAccessor, SurrogateLogger> a : accessors.entrySet()) {
+                a.getKey().release(a.getValue(), !lazy);
+            }
+        }
+
+        // all accesses must be synchronized on the outer BootstrapLogger.class
+        static final RedirectedLoggers INSTANCE = new RedirectedLoggers();
+    }
+
+    static synchronized Logger createSurrogateLogger(LazyLoggerAccessor a) {
+        // accesses to RedirectedLoggers is synchronized on BootstrapLogger.class
+        return RedirectedLoggers.INSTANCE.get(a);
+    }
+
+    private static volatile boolean logManagerConfigured;
+
+    private static synchronized Map<LazyLoggerAccessor, SurrogateLogger>
+         releaseSurrogateLoggers() {
+        // first check whether there's a chance that we have used
+        // surrogate loggers; Will be false if logManagerConfigured is already
+        // true.
+        final boolean releaseSurrogateLoggers = useSurrogateLoggers();
+
+        // then sets the flag that tells that the log manager is configured
+        logManagerConfigured = true;
+
+        // finally retrieves all surrogate loggers that should be replaced
+        // by real JUL loggers, and return them in the form of a redirected
+        // loggers map.
+        if (releaseSurrogateLoggers) {
+            // accesses to RedirectedLoggers is synchronized on BootstrapLogger.class
+            return RedirectedLoggers.INSTANCE.drainLoggersMap();
+        } else {
+            return null;
+        }
+    }
+
+    public static void redirectTemporaryLoggers() {
+        // This call is synchronized on BootstrapLogger.class.
+        final Map<LazyLoggerAccessor, SurrogateLogger> accessors =
+                releaseSurrogateLoggers();
+
+        // We will now reset the logger accessors, triggering the
+        // (possibly lazy) replacement of any temporary surrogate logger by the
+        // real logger returned from the loaded LoggerFinder.
+        if (accessors != null) {
+            RedirectedLoggers.replaceSurrogateLoggers(accessors);
+        }
+
+        BootstrapExecutors.flush();
+    }
+
+    // Hook for tests which need to wait until pending messages
+    // are processed.
+    static void awaitPendingTasks() {
+        BootstrapExecutors.awaitPendingTasks();
+    }
+    static boolean isAlive() {
+        return BootstrapExecutors.isAlive();
+    }
+
+}
diff --git a/tests/test_data/std/jdk/internal/logger/DefaultLoggerFinder$1.class b/tests/test_data/std/jdk/internal/logger/DefaultLoggerFinder$1.class
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diff --git a/tests/test_data/std/jdk/internal/logger/DefaultLoggerFinder.java b/tests/test_data/std/jdk/internal/logger/DefaultLoggerFinder.java
new file mode 100644
index 00000000..1d077f15
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/logger/DefaultLoggerFinder.java
@@ -0,0 +1,191 @@
+/*
+ * Copyright (c) 2015, 2021, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package jdk.internal.logger;
+
+import jdk.internal.misc.VM;
+
+import java.lang.ref.Reference;
+import java.lang.ref.WeakReference;
+import java.util.HashMap;
+import java.util.Map;
+import java.util.function.Function;
+import java.util.Objects;
+import java.lang.System.LoggerFinder;
+import java.lang.System.Logger;
+import java.lang.ref.ReferenceQueue;
+import java.security.AccessController;
+import java.security.PrivilegedAction;
+import java.util.Collection;
+import java.util.ResourceBundle;
+
+/**
+ * Internal Service Provider Interface (SPI) that makes it possible to use
+ * {@code java.util.logging} as backend when the {@link
+ * sun.util.logging.internal.LoggingProviderImpl
+ * sun.util.logging.internal.LoggingProviderImpl} is present.
+ * <p>
+ * The JDK default implementation of the {@link LoggerFinder} will
+ * attempt to locate and load an {@linkplain
+ * java.util.ServiceLoader#loadInstalled(java.lang.Class) installed}
+ * implementation of the {@code DefaultLoggerFinder}. If {@code java.util.logging}
+ * is present, this will usually resolve to an instance of {@link
+ * sun.util.logging.internal.LoggingProviderImpl sun.util.logging.internal.LoggingProviderImpl}.
+ * Otherwise, if no concrete service provider is declared for
+ * {@code DefaultLoggerFinder}, the default implementation provided by this class
+ * will be used.
+ * <p>
+ * When the {@link sun.util.logging.internal.LoggingProviderImpl
+ * sun.util.logging.internal.LoggingProviderImpl} is not present then the
+ * default implementation provided by this class is to use a simple logger
+ * that will log messages whose level is INFO and above to the console.
+ * These simple loggers are not configurable.
+ * <p>
+ * When configuration is needed, an application should either link with
+ * {@code java.util.logging} - and use the {@code java.util.logging} for
+ * configuration, or link with {@link LoggerFinder another implementation}
+ * of the {@link LoggerFinder}
+ * that provides the necessary configuration.
+ *
+ * @apiNote Programmers are not expected to call this class directly.
+ * Instead they should rely on the static methods defined by {@link
+ * java.lang.System java.lang.System} or {@link sun.util.logging.PlatformLogger
+ * sun.util.logging.PlatformLogger}.
+ *
+ * @see java.lang.System.LoggerFinder
+ * @see jdk.internal.logger
+ * @see sun.util.logging.internal
+ *
+ */
+public class DefaultLoggerFinder extends LoggerFinder {
+
+    static final RuntimePermission LOGGERFINDER_PERMISSION =
+                new RuntimePermission("loggerFinder");
+
+    /**
+     * Creates a new instance of DefaultLoggerFinder.
+     * @throws SecurityException if the calling code does not have the
+     * {@code RuntimePermission("loggerFinder")}
+     */
+    protected DefaultLoggerFinder() {
+        this(checkPermission());
+    }
+
+    private DefaultLoggerFinder(Void unused) {
+        // nothing to do.
+    }
+
+    private static Void checkPermission() {
+        @SuppressWarnings("removal")
+        final SecurityManager sm = System.getSecurityManager();
+        if (sm != null) {
+            sm.checkPermission(LOGGERFINDER_PERMISSION);
+        }
+        return null;
+    }
+
+    // SharedLoggers is a default cache of loggers used when JUL is not
+    // present - in that case we use instances of SimpleConsoleLogger which
+    // cannot be directly configure through public APIs.
+    //
+    // We can therefore afford to simply maintain two domains - one for the
+    // system, and one for the application.
+    //
+    static final class SharedLoggers {
+        private final Map<String, Reference<Logger>> loggers =
+                new HashMap<>();
+        private final ReferenceQueue<Logger> queue = new ReferenceQueue<>();
+
+        synchronized Logger get(Function<String, Logger> loggerSupplier, final String name) {
+            Reference<? extends Logger> ref = loggers.get(name);
+            Logger w = ref == null ? null :  ref.get();
+            if (w == null) {
+                w = loggerSupplier.apply(name);
+                loggers.put(name, new WeakReference<>(w, queue));
+            }
+
+            // Remove stale mapping...
+            Collection<Reference<Logger>> values = null;
+            while ((ref = queue.poll()) != null) {
+                if (values == null) values = loggers.values();
+                values.remove(ref);
+            }
+            return w;
+        }
+
+        static final SharedLoggers system = new SharedLoggers();
+        static final SharedLoggers application = new SharedLoggers();
+    }
+
+    @SuppressWarnings("removal")
+    public static boolean isSystem(Module m) {
+        return AccessController.doPrivileged(new PrivilegedAction<>() {
+            @Override
+            public Boolean run() {
+                // returns true if moduleCL is the platform class loader
+                // or one of its ancestors.
+                return VM.isSystemDomainLoader(m.getClassLoader());
+            }
+        });
+    }
+
+    @Override
+    public final Logger getLogger(String name,  Module module) {
+        Objects.requireNonNull(name, "name");
+        Objects.requireNonNull(module, "module");
+        checkPermission();
+        return demandLoggerFor(name, module);
+    }
+
+    @Override
+    public final Logger getLocalizedLogger(String name, ResourceBundle bundle,
+                                           Module module) {
+        return super.getLocalizedLogger(name, bundle, module);
+    }
+
+    /**
+     * Returns a {@link Logger logger} suitable for use within the
+     * given {@code module}.
+     *
+     * @implSpec The default implementation for this method is to return a
+     *    simple logger that will print all messages of INFO level and above
+     *    to the console. That simple logger is not configurable.
+     *
+     * @param name The name of the logger.
+     * @param module The module on behalf of which the logger is created.
+     * @return A {@link Logger logger} suitable for the application usage.
+     * @throws SecurityException if the calling code does not have the
+     * {@code RuntimePermission("loggerFinder")}.
+     */
+    protected Logger demandLoggerFor(String name, Module module) {
+        checkPermission();
+        if (isSystem(module)) {
+            return SharedLoggers.system.get(SimpleConsoleLogger::makeSimpleLogger, name);
+        } else {
+            return SharedLoggers.application.get(SimpleConsoleLogger::makeSimpleLogger, name);
+        }
+    }
+
+}
diff --git a/tests/test_data/std/jdk/internal/logger/LazyLoggers$1.class b/tests/test_data/std/jdk/internal/logger/LazyLoggers$1.class
new file mode 100644
index 0000000000000000000000000000000000000000..76511ce7a5dab63a4aef3737f0c3ef26b6ab6ba3
GIT binary patch
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diff --git a/tests/test_data/std/jdk/internal/logger/LazyLoggers.java b/tests/test_data/std/jdk/internal/logger/LazyLoggers.java
new file mode 100644
index 00000000..2c624962
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/logger/LazyLoggers.java
@@ -0,0 +1,469 @@
+/*
+ * Copyright (c) 2015, 2023, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package jdk.internal.logger;
+
+import java.security.AccessController;
+import java.security.PrivilegedAction;
+import java.util.function.BiFunction;
+import java.lang.System.LoggerFinder;
+import java.lang.System.Logger;
+import java.lang.ref.WeakReference;
+import java.util.Objects;
+import java.util.function.BooleanSupplier;
+
+import jdk.internal.logger.LoggerFinderLoader.TemporaryLoggerFinder;
+import jdk.internal.misc.VM;
+import sun.util.logging.PlatformLogger;
+
+/**
+ * This class is a factory for Lazy Loggers; only system loggers can be
+ * Lazy Loggers.
+ */
+public final class LazyLoggers {
+
+    static final RuntimePermission LOGGERFINDER_PERMISSION =
+                new RuntimePermission("loggerFinder");
+
+    private LazyLoggers() {
+        throw new InternalError();
+    }
+
+    /**
+     * This class is used to hold the factories that a Lazy Logger will use
+     * to create (or map) its wrapped logger.
+     * @param <L> {@link Logger} or a subclass of {@link Logger}.
+     */
+    private static final class LazyLoggerFactories<L extends Logger> {
+
+        /**
+         * A factory method to create an SPI logger.
+         * Usually, this will be something like LazyLoggers::getSystemLogger.
+         */
+        final BiFunction<String, Module, L> loggerSupplier;
+
+
+        public LazyLoggerFactories(BiFunction<String, Module, L> loggerSupplier) {
+            this(Objects.requireNonNull(loggerSupplier),
+                 (Void)null);
+        }
+
+        private LazyLoggerFactories(BiFunction<String, Module, L> loggerSupplier,
+                          Void unused) {
+            this.loggerSupplier = loggerSupplier;
+        }
+
+    }
+
+    static interface LoggerAccessor {
+        /**
+         * The logger name.
+         * @return The name of the logger that is / will be lazily created.
+         */
+        public String getLoggerName();
+
+        /**
+         * Returns the wrapped logger object.
+         * @return the wrapped logger object.
+         */
+        public Logger wrapped();
+
+        /**
+         * A PlatformLogger.Bridge view of the wrapped logger object.
+         * @return A PlatformLogger.Bridge view of the wrapped logger object.
+         */
+        public PlatformLogger.Bridge platform();
+    }
+
+    /**
+     * The LazyLoggerAccessor class holds all the logic that delays the creation
+     * of the SPI logger until such a time that the VM is booted and the logger
+     * is actually used for logging.
+     *
+     * This class uses the services of the BootstrapLogger class to instantiate
+     * temporary loggers if appropriate.
+     */
+    static final class LazyLoggerAccessor implements LoggerAccessor {
+
+        // The factories that will be used to create the logger lazyly
+        final LazyLoggerFactories<? extends Logger> factories;
+
+        // We need to pass the actual caller module when creating the logger.
+        private final WeakReference<Module> moduleRef;
+
+        // whether this is the loading thread, can be null
+        private final BooleanSupplier isLoadingThread;
+
+        // The name of the logger that will be created lazyly
+        final String name;
+        // The plain logger SPI object - null until it is accessed for the
+        // first time.
+        private volatile Logger w;
+        // A PlatformLogger.Bridge view of w.
+        private volatile PlatformLogger.Bridge p;
+
+
+        private LazyLoggerAccessor(String name,
+                                   LazyLoggerFactories<? extends Logger> factories,
+                                   Module module) {
+            this(name, factories, module, null);
+        }
+
+        private LazyLoggerAccessor(String name,
+                                   LazyLoggerFactories<? extends Logger> factories,
+                                   Module module, BooleanSupplier isLoading) {
+
+            this(Objects.requireNonNull(name), Objects.requireNonNull(factories),
+                    Objects.requireNonNull(module), isLoading, null);
+        }
+
+        private LazyLoggerAccessor(String name,
+                                   LazyLoggerFactories<? extends Logger> factories,
+                                   Module module, BooleanSupplier isLoading, Void unused) {
+            this.name = name;
+            this.factories = factories;
+            this.moduleRef = new WeakReference<>(module);
+            this.isLoadingThread = isLoading;
+        }
+
+        /**
+         * The logger name.
+         * @return The name of the logger that is / will be lazily created.
+         */
+        @Override
+        public String getLoggerName() {
+            return name;
+        }
+
+        // must be called in synchronized block
+        // set wrapped logger if not set
+        private void setWrappedIfNotSet(Logger wrapped) {
+            if (w == null) {
+                w = wrapped;
+            }
+        }
+
+        /**
+         * Returns the logger SPI object, creating it if 'w' is still null.
+         * @return the logger SPI object.
+         */
+        public Logger wrapped() {
+            Logger wrapped = w;
+            if (wrapped != null) return wrapped;
+            // Wrapped logger not created yet: create it.
+            // BootstrapLogger has the logic to decide whether to invoke the
+            // SPI or use a temporary (BootstrapLogger or SimpleConsoleLogger)
+            // logger.
+            wrapped = BootstrapLogger.getLogger(this, isLoadingThread);
+            synchronized(this) {
+                // if w has already been in between, simply drop 'wrapped'.
+                setWrappedIfNotSet(wrapped);
+                return w;
+            }
+        }
+
+        /**
+         * A PlatformLogger.Bridge view of the wrapped logger.
+         * @return A PlatformLogger.Bridge view of the wrapped logger.
+         */
+        public PlatformLogger.Bridge platform() {
+            // We can afford to return the platform view of the previous
+            // logger - if that view is not null.
+            // Because that view will either be the BootstrapLogger, which
+            // will redirect to the new wrapper properly, or the temporary
+            // logger - which in effect is equivalent to logging something
+            // just before the application initialized LogManager.
+            PlatformLogger.Bridge platform = p;
+            if (platform != null) return platform;
+            synchronized (this) {
+                if (w != null) {
+                    if (p == null) p = PlatformLogger.Bridge.convert(w);
+                    return p;
+                }
+            }
+            // If we reach here it means that the wrapped logger may not
+            // have been created yet: attempt to create it.
+            // BootstrapLogger has the logic to decide whether to invoke the
+            // SPI or use a temporary (BootstrapLogger or SimpleConsoleLogger)
+            // logger.
+            final Logger wrapped = BootstrapLogger.getLogger(this, isLoadingThread);
+            synchronized(this) {
+                // if w has already been set, simply drop 'wrapped'.
+                setWrappedIfNotSet(wrapped);
+                if (p == null) p = PlatformLogger.Bridge.convert(w);
+                return p;
+            }
+        }
+
+        /**
+         * Makes this accessor release a temporary logger.
+         * This method is called
+         * by BootstrapLogger when JUL is the default backend and LogManager
+         * is initialized, in order to replace temporary SimpleConsoleLoggers by
+         * real JUL loggers. See BootstrapLogger for more details.
+         * If {@code replace} is {@code true}, then this method will force
+         * the accessor to eagerly recreate its wrapped logger.
+         * Note: passing {@code replace=false} is no guarantee that the
+         * method will not actually replace the released logger.
+         * @param temporary The temporary logger too be released.
+         * @param replace   Whether the released logger should be eagerly
+         *                  replaced.
+         */
+        void release(SimpleConsoleLogger temporary, boolean replace) {
+            PlatformLogger.ConfigurableBridge.LoggerConfiguration conf =
+                PlatformLogger.ConfigurableBridge.getLoggerConfiguration(temporary);
+            PlatformLogger.Level level = conf != null
+                    ? conf.getPlatformLevel()
+                    : null;
+            synchronized (this) {
+                if (this.w == temporary) {
+                    this.w = null; this.p = null;
+                }
+            }
+            PlatformLogger.Bridge platform =  replace || level != null
+                    ? this.platform() : null;
+
+            if (level != null) {
+                conf = (platform != null && platform != temporary)
+                        ? PlatformLogger.ConfigurableBridge.getLoggerConfiguration(platform)
+                        : null;
+                if (conf != null) conf.setPlatformLevel(level);
+            }
+        }
+
+        /**
+         * Replace 'w' by the real SPI logger and flush the log messages pending
+         * in the temporary 'bootstrap' Logger. Called by BootstrapLogger when
+         * this accessor's bootstrap logger is accessed and BootstrapLogger
+         * notices that the VM is no longer booting.
+         * @param bootstrap This accessor's bootstrap logger (usually this is 'w').
+         */
+        Logger getConcreteLogger(BootstrapLogger bootstrap) {
+            assert VM.isBooted();
+            synchronized(this) {
+                // another thread may have already invoked flush()
+                if (this.w == bootstrap) {
+                    this.w = null; this.p = null;
+                }
+            }
+            return this.wrapped();
+        }
+
+        PlatformLogger.Bridge getConcretePlatformLogger(BootstrapLogger bootstrap) {
+            assert VM.isBooted();
+            synchronized(this) {
+                // another thread may have already invoked flush()
+                if (this.w == bootstrap) {
+                    this.w = null; this.p = null;
+                }
+            }
+            return this.platform();
+        }
+
+        // Creates the wrapped logger by invoking the SPI.
+        Logger createLogger() {
+            final Module module = moduleRef.get();
+            if (module == null) {
+                throw new IllegalStateException("The module for which this logger"
+                        + " was created has been garbage collected");
+            }
+            return this.factories.loggerSupplier.apply(name, module);
+        }
+
+        /**
+         * Creates a new lazy logger accessor for the named logger. The given
+         * factories will be use when it becomes necessary to actually create
+         * the logger.
+         * @param name The logger name.
+         * @param factories The factories that should be used to create the
+         *                  wrapped logger.
+         * @param module The module for which the logger is being created
+         * @return A new LazyLoggerAccessor.
+         */
+        public static LazyLoggerAccessor makeAccessor(String name,
+                LazyLoggerFactories<? extends Logger> factories, Module module) {
+                return new LazyLoggerAccessor(name, factories, module);
+        }
+
+    }
+
+    /**
+     * An implementation of {@link Logger} that redirects all calls to a wrapped
+     * instance of {@code Logger}.
+     */
+    private static class LazyLoggerWrapper
+        extends AbstractLoggerWrapper<Logger> {
+
+        final LoggerAccessor loggerAccessor;
+
+        public LazyLoggerWrapper(LazyLoggerAccessor loggerSinkSupplier) {
+            this(Objects.requireNonNull(loggerSinkSupplier), (Void)null);
+        }
+
+        private LazyLoggerWrapper(LazyLoggerAccessor loggerSinkSupplier,
+                Void unused) {
+            this.loggerAccessor = loggerSinkSupplier;
+        }
+
+        @Override
+        final Logger wrapped() {
+            return loggerAccessor.wrapped();
+        }
+
+        @Override
+        PlatformLogger.Bridge platformProxy() {
+            return loggerAccessor.platform();
+        }
+
+    }
+
+    // Do not expose this outside of this package.
+    private static volatile LoggerFinder provider;
+    @SuppressWarnings("removal")
+    private static LoggerFinder accessLoggerFinder() {
+        LoggerFinder prov = provider;
+        if (prov == null) {
+            // no need to lock: it doesn't matter if we call
+            // getLoggerFinder() twice - since LoggerFinder already caches
+            // the result.
+            // This is just an optimization to avoid the cost of calling
+            // doPrivileged every time.
+            final SecurityManager sm = System.getSecurityManager();
+            prov = sm == null ? LoggerFinder.getLoggerFinder() :
+                AccessController.doPrivileged(
+                        (PrivilegedAction<LoggerFinder>)LoggerFinder::getLoggerFinder);
+            if (prov instanceof TemporaryLoggerFinder) return prov;
+            provider = prov;
+        }
+        return prov;
+    }
+
+    // Avoid using lambda here as lazy loggers could be created early
+    // in the bootstrap sequence...
+    private static final BiFunction<String, Module, Logger> loggerSupplier =
+           new BiFunction<>() {
+        @Override
+        public Logger apply(String name, Module module) {
+            return LazyLoggers.getLoggerFromFinder(name, module);
+        }
+    };
+
+    private static final LazyLoggerFactories<Logger> factories =
+           new LazyLoggerFactories<>(loggerSupplier);
+
+
+    // A concrete implementation of Logger that delegates to a  System.Logger,
+    // but only creates the System.Logger instance lazily when it's used for
+    // the first time.
+    // The JdkLazyLogger uses a LazyLoggerAccessor objects, which relies
+    // on the logic embedded in BootstrapLogger to avoid loading the concrete
+    // logger provider until the VM has finished booting.
+    //
+    private static final class JdkLazyLogger extends LazyLoggerWrapper {
+        JdkLazyLogger(String name, Module module) {
+            this(LazyLoggerAccessor.makeAccessor(name, factories, module),
+                 (Void)null);
+        }
+        private JdkLazyLogger(LazyLoggerAccessor holder, Void unused) {
+            super(holder);
+        }
+    }
+
+    static Logger makeLazyLogger(String name, Module module, BooleanSupplier isLoading) {
+        final LazyLoggerAccessor holder = new LazyLoggerAccessor(name, factories, module, isLoading);
+        return new JdkLazyLogger(holder, null);
+    }
+
+    /**
+     * Gets a logger from the LoggerFinder. Creates the actual concrete
+     * logger.
+     * @param name    name of the logger
+     * @param module  module on behalf of which the logger is created
+     * @return  The logger returned by the LoggerFinder.
+     */
+    @SuppressWarnings("removal")
+    static Logger getLoggerFromFinder(String name, Module module) {
+        final SecurityManager sm = System.getSecurityManager();
+        if (sm == null) {
+            return accessLoggerFinder().getLogger(name, module);
+        } else {
+            return AccessController.doPrivileged((PrivilegedAction<Logger>)
+                    () -> {return accessLoggerFinder().getLogger(name, module);},
+                    null, LOGGERFINDER_PERMISSION);
+        }
+    }
+
+    /**
+     * Returns a (possibly lazy) Logger for the caller.
+     *
+     * @param name the logger name
+     * @param module The module on behalf of which the logger is created.
+     *               If the module is not loaded from the Boot ClassLoader,
+     *               the LoggerFinder is accessed and the logger returned
+     *               by {@link LoggerFinder#getLogger(java.lang.String, java.lang.Module)}
+     *               is returned to the caller directly.
+     *               Otherwise, the logger returned by
+     *               {@link #getLazyLogger(java.lang.String, java.lang.Module)}
+     *               is returned to the caller.
+     *
+     * @return  a (possibly lazy) Logger instance.
+     */
+    public static final Logger getLogger(String name, Module module) {
+        if (DefaultLoggerFinder.isSystem(module)) {
+            return getLazyLogger(name, module);
+        } else {
+            return getLoggerFromFinder(name, module);
+        }
+    }
+
+    /**
+     * Returns a (possibly lazy) Logger suitable for system classes.
+     * Whether the returned logger is lazy or not depend on the result
+     * returned by {@link BootstrapLogger#useLazyLoggers()}.
+     *
+     * @param name the logger name
+     * @param module the module on behalf of which the logger is created.
+     * @return  a (possibly lazy) Logger instance.
+     */
+    public static final Logger getLazyLogger(String name, Module module) {
+
+        // BootstrapLogger has the logic to determine whether a LazyLogger
+        // should be used. Usually, it is worth it only if:
+        //   - the VM is not yet booted
+        //   - or, the backend is JUL and there is no configuration
+        //   - or, the backend is a custom backend, as we don't know what
+        //     that is going to load...
+        // So if for instance the VM is booted and we use JUL with a custom
+        // configuration, we're not going to delay the creation of loggers...
+        final boolean useLazyLogger = BootstrapLogger.useLazyLoggers();
+        if (useLazyLogger) {
+            return new JdkLazyLogger(name, module);
+        } else {
+            // Directly invoke the LoggerFinder.
+            return getLoggerFromFinder(name, module);
+        }
+    }
+
+}
diff --git a/tests/test_data/std/jdk/internal/logger/LocalizedLoggerWrapper.class b/tests/test_data/std/jdk/internal/logger/LocalizedLoggerWrapper.class
new file mode 100644
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/logger/LocalizedLoggerWrapper.java b/tests/test_data/std/jdk/internal/logger/LocalizedLoggerWrapper.java
new file mode 100644
index 00000000..361ebc30
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/logger/LocalizedLoggerWrapper.java
@@ -0,0 +1,155 @@
+/*
+ * Copyright (c) 2015, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+
+package jdk.internal.logger;
+
+import java.util.ResourceBundle;
+import java.util.function.Supplier;
+import java.lang.System.Logger;
+import java.lang.System.Logger.Level;
+
+/**
+ * This implementation of {@link Logger} redirects all logging method
+ * calls to calls to {@code log(Level, String,  ResourceBundle, ...)}
+ * methods, passing the Logger's ResourceBundle as parameter.
+ * So for instance a call to {@link Logger#log(Level, String)
+ * log(Level.INFO, msg)} will be redirected
+ * to a call to {@link #log(java.lang.System.Logger.Level,
+ * java.util.ResourceBundle, java.lang.String, java.lang.Object...)
+ * this.log(Level.INFO, this.bundle, msg, (Object[]) null)}.
+ * <p>
+ * Note that methods that take a {@link Supplier Supplier&lt;String&gt;}
+ * or an Object are not redirected. It is assumed that a string returned
+ * by a {@code Supplier<String>} is already localized, or cannot be localized.
+ *
+ * @param <L> Type of the wrapped Logger: {@code Logger} or an
+ *        extension of the {@code Logger} interface.
+ */
+public class LocalizedLoggerWrapper<L extends Logger> extends LoggerWrapper<L> {
+
+    private final ResourceBundle bundle;
+
+    public LocalizedLoggerWrapper(L wrapped, ResourceBundle bundle) {
+        super(wrapped);
+        this.bundle = bundle;
+    }
+
+    public final ResourceBundle getBundle() {
+        return bundle;
+    }
+
+    // We assume that messages returned by Supplier<String> and Object are
+    // either already localized or not localizable. To be evaluated.
+
+    // -----------------------------------------------------------------
+    // Generic methods taking a Level as parameter
+    // -----------------------------------------------------------------
+
+    @Override
+    public final void log(Level level, String msg) {
+        log(level, bundle, msg, (Object[]) null);
+    }
+
+    @Override
+    public final void log(Level level,
+                   String msg, Throwable thrown) {
+        log(level, bundle, msg, thrown);
+    }
+
+    @Override
+    public final void log(Level level,
+                    String format, Object... params) {
+        log(level, bundle, format, params);
+    }
+
+    @Override
+    public final void log(Level level, Object obj) {
+        wrapped.log(level, obj);
+    }
+
+    @Override
+    public final void log(Level level, Supplier<String> msgSupplier) {
+        wrapped.log(level, msgSupplier);
+    }
+
+    @Override
+    public final void log(Level level, Supplier<String> msgSupplier, Throwable thrown) {
+        wrapped.log(level, msgSupplier, thrown);
+    }
+
+    @Override
+    public final void log(Level level, ResourceBundle bundle, String format, Object... params) {
+        wrapped.log(level, bundle, format, params);
+    }
+
+    @Override
+    public final void log(Level level, ResourceBundle bundle, String key, Throwable thrown) {
+        wrapped.log(level, bundle, key, thrown);
+    }
+
+    @Override
+    public final boolean isLoggable(Level level) {
+        return wrapped.isLoggable(level);
+    }
+
+    // Override methods from PlatformLogger.Bridge that don't take a
+    // resource bundle...
+
+    @Override
+    public final void logp(sun.util.logging.PlatformLogger.Level level, String sourceClass, String sourceMethod,
+            String key) {
+        logrb(level, sourceClass, sourceMethod, bundle, key, (Object[]) null);
+    }
+
+    @Override
+    public final void logp(sun.util.logging.PlatformLogger.Level level, String sourceClass, String sourceMethod,
+            String key, Throwable thrown) {
+        logrb(level, sourceClass, sourceMethod, bundle, key, thrown);
+    }
+
+    @Override
+    public final void logp(sun.util.logging.PlatformLogger.Level level, String sourceClass, String sourceMethod,
+            String key, Object... params) {
+        logrb(level, sourceClass, sourceMethod, bundle, key, params);
+    }
+
+    @Override
+    public final void log(sun.util.logging.PlatformLogger.Level level, String msg, Throwable thrown) {
+        logrb(level, bundle, msg, thrown);
+    }
+
+    @Override
+    public final void log(sun.util.logging.PlatformLogger.Level level, String msg) {
+        logrb(level, bundle, msg, (Object[]) null);
+    }
+
+    @Override
+    public final void log(sun.util.logging.PlatformLogger.Level level, String format, Object... params) {
+        logrb(level, bundle, format, params);
+    }
+
+
+}
diff --git a/tests/test_data/std/jdk/internal/logger/LoggerFinderLoader$ErrorPolicy.class b/tests/test_data/std/jdk/internal/logger/LoggerFinderLoader$ErrorPolicy.class
new file mode 100644
index 0000000000000000000000000000000000000000..21ec17c8739034439537c8cf404e2ebe9fdff3d9
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diff --git a/tests/test_data/std/jdk/internal/logger/LoggerFinderLoader$TemporaryLoggerFinder$1.class b/tests/test_data/std/jdk/internal/logger/LoggerFinderLoader$TemporaryLoggerFinder$1.class
new file mode 100644
index 0000000000000000000000000000000000000000..6747d5922e0200e93a7a495906acf9458cd02e67
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diff --git a/tests/test_data/std/jdk/internal/logger/LoggerFinderLoader$TemporaryLoggerFinder.class b/tests/test_data/std/jdk/internal/logger/LoggerFinderLoader$TemporaryLoggerFinder.class
new file mode 100644
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HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/logger/LoggerFinderLoader.java b/tests/test_data/std/jdk/internal/logger/LoggerFinderLoader.java
new file mode 100644
index 00000000..932de4ef
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/logger/LoggerFinderLoader.java
@@ -0,0 +1,267 @@
+/*
+ * Copyright (c) 2015, 2023, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package jdk.internal.logger;
+
+import java.io.FilePermission;
+import java.lang.System.Logger;
+import java.lang.System.LoggerFinder;
+import java.security.AccessController;
+import java.security.Permission;
+import java.security.PrivilegedAction;
+import java.util.Iterator;
+import java.util.Locale;
+import java.util.ServiceConfigurationError;
+import java.util.ServiceLoader;
+import java.util.function.BooleanSupplier;
+
+import jdk.internal.vm.annotation.Stable;
+import sun.security.util.SecurityConstants;
+import sun.security.action.GetBooleanAction;
+import sun.security.action.GetPropertyAction;
+
+/**
+ * Helper class used to load the {@link java.lang.System.LoggerFinder}.
+ */
+public final class LoggerFinderLoader {
+    private static volatile System.LoggerFinder service;
+    private static final Object lock = new int[0];
+    static final Permission CLASSLOADER_PERMISSION =
+            SecurityConstants.GET_CLASSLOADER_PERMISSION;
+    static final Permission READ_PERMISSION =
+            new FilePermission("<<ALL FILES>>",
+                    SecurityConstants.FILE_READ_ACTION);
+    public static final RuntimePermission LOGGERFINDER_PERMISSION =
+                new RuntimePermission("loggerFinder");
+
+    // This is used to control how the LoggerFinderLoader handles
+    // errors when instantiating the LoggerFinder provider.
+    // ERROR => throws ServiceConfigurationError
+    // WARNING => Do not fail, use plain default (simple logger) implementation,
+    //            prints warning on console. (this is the default)
+    // DEBUG => Do not fail, use plain default (simple logger) implementation,
+    //          prints warning and exception stack trace on console.
+    // QUIET => Do not fail and stay silent.
+    private static enum ErrorPolicy { ERROR, WARNING, DEBUG, QUIET };
+
+    // This class is static and cannot be instantiated.
+    private LoggerFinderLoader() {
+        throw new InternalError("LoggerFinderLoader cannot be instantiated");
+    }
+
+    // record the loadingThread while loading the backend
+    static volatile Thread loadingThread;
+    // Return the loaded LoggerFinder, or load it if not already loaded.
+    private static System.LoggerFinder service() {
+        if (service != null) return service;
+        // ensure backend is detected before attempting to load the finder
+        BootstrapLogger.ensureBackendDetected();
+        synchronized(lock) {
+            if (service != null) return service;
+            Thread currentThread = Thread.currentThread();
+            if (loadingThread == currentThread) {
+                // recursive attempt to load the backend while loading the backend
+                // use a temporary logger finder that returns special BootstrapLogger
+                // which will wait until loading is finished
+                return TemporaryLoggerFinder.INSTANCE;
+            }
+            loadingThread = currentThread;
+            try {
+                service = loadLoggerFinder();
+            } finally {
+                loadingThread = null;
+            }
+        }
+        // Since the LoggerFinder is already loaded - we can stop using
+        // temporary loggers.
+        BootstrapLogger.redirectTemporaryLoggers();
+        return service;
+    }
+
+    // returns true if called by the thread that loads the LoggerFinder, while
+    // loading the LoggerFinder.
+    static boolean isLoadingThread() {
+        return loadingThread != null && loadingThread == Thread.currentThread();
+    }
+
+    // Get configuration error policy
+    private static ErrorPolicy configurationErrorPolicy() {
+        String errorPolicy =
+                GetPropertyAction.privilegedGetProperty("jdk.logger.finder.error");
+        if (errorPolicy == null || errorPolicy.isEmpty()) {
+            return ErrorPolicy.WARNING;
+        }
+        try {
+            return ErrorPolicy.valueOf(errorPolicy.toUpperCase(Locale.ROOT));
+        } catch (IllegalArgumentException x) {
+            return ErrorPolicy.WARNING;
+        }
+    }
+
+    // Whether multiple provider should be considered as an error.
+    // This is further submitted to the configuration error policy.
+    private static boolean ensureSingletonProvider() {
+        return GetBooleanAction.privilegedGetProperty
+            ("jdk.logger.finder.singleton");
+    }
+
+    @SuppressWarnings("removal")
+    private static Iterator<System.LoggerFinder> findLoggerFinderProviders() {
+        final Iterator<System.LoggerFinder> iterator;
+        if (System.getSecurityManager() == null) {
+            iterator = ServiceLoader.load(System.LoggerFinder.class,
+                        ClassLoader.getSystemClassLoader()).iterator();
+        } else {
+            final PrivilegedAction<Iterator<System.LoggerFinder>> pa =
+                    () -> ServiceLoader.load(System.LoggerFinder.class,
+                        ClassLoader.getSystemClassLoader()).iterator();
+            iterator = AccessController.doPrivileged(pa, null,
+                        LOGGERFINDER_PERMISSION, CLASSLOADER_PERMISSION,
+                        READ_PERMISSION);
+        }
+        return iterator;
+    }
+
+    public static final class TemporaryLoggerFinder extends LoggerFinder {
+        private TemporaryLoggerFinder() {}
+        @Stable
+        private LoggerFinder loadedService;
+
+        private static final BooleanSupplier isLoadingThread = new BooleanSupplier() {
+            @Override
+            public boolean getAsBoolean() {
+                return LoggerFinderLoader.isLoadingThread();
+            }
+        };
+        private static final TemporaryLoggerFinder INSTANCE = new TemporaryLoggerFinder();
+
+        @Override
+        public Logger getLogger(String name, Module module) {
+            if (loadedService == null) {
+                loadedService = service;
+                if (loadedService == null) {
+                    return LazyLoggers.makeLazyLogger(name, module, isLoadingThread);
+                }
+            }
+            assert loadedService != null;
+            assert !LoggerFinderLoader.isLoadingThread();
+            assert loadedService != this;
+            return LazyLoggers.getLogger(name, module);
+        }
+    }
+
+    // Loads the LoggerFinder using ServiceLoader. If no LoggerFinder
+    // is found returns the default (possibly JUL based) implementation
+    private static System.LoggerFinder loadLoggerFinder() {
+        System.LoggerFinder result;
+        try {
+            // Iterator iterates with the access control context stored
+            // at ServiceLoader creation time.
+            final Iterator<System.LoggerFinder> iterator =
+                    findLoggerFinderProviders();
+            if (iterator.hasNext()) {
+                result = iterator.next();
+                if (iterator.hasNext() && ensureSingletonProvider()) {
+                    throw new ServiceConfigurationError(
+                            "More than one LoggerFinder implementation");
+                }
+            } else {
+                result = loadDefaultImplementation();
+            }
+        } catch (Error | RuntimeException x) {
+            // next caller will get the plain default impl (not linked
+            // to java.util.logging)
+            service = result = new DefaultLoggerFinder();
+            ErrorPolicy errorPolicy = configurationErrorPolicy();
+            if (errorPolicy == ErrorPolicy.ERROR) {
+                // rethrow any exception as a ServiceConfigurationError.
+                if (x instanceof Error) {
+                    throw x;
+                } else {
+                    throw new ServiceConfigurationError(
+                        "Failed to instantiate LoggerFinder provider; Using default.", x);
+                }
+            } else if (errorPolicy != ErrorPolicy.QUIET) {
+                // if QUIET just silently use the plain default impl
+                // otherwise, log a warning, possibly adding the exception
+                // stack trace (if DEBUG is specified).
+                SimpleConsoleLogger logger =
+                        new SimpleConsoleLogger("jdk.internal.logger", false);
+                logger.log(System.Logger.Level.WARNING,
+                        "Failed to instantiate LoggerFinder provider; Using default.");
+                if (errorPolicy == ErrorPolicy.DEBUG) {
+                    logger.log(System.Logger.Level.WARNING,
+                        "Exception raised trying to instantiate LoggerFinder", x);
+                }
+            }
+        }
+        return result;
+    }
+
+    @SuppressWarnings("removal")
+    private static System.LoggerFinder loadDefaultImplementation() {
+        final SecurityManager sm = System.getSecurityManager();
+        final Iterator<DefaultLoggerFinder> iterator;
+        if (sm == null) {
+            iterator = ServiceLoader.loadInstalled(DefaultLoggerFinder.class).iterator();
+        } else {
+            // We use limited do privileged here - the minimum set of
+            // permissions required to 'see' the META-INF/services resources
+            // seems to be CLASSLOADER_PERMISSION and READ_PERMISSION.
+            // Note that do privileged is required because
+            // otherwise the SecurityManager will prevent the ServiceLoader
+            // from seeing the installed provider.
+            PrivilegedAction<Iterator<DefaultLoggerFinder>> pa = () ->
+                    ServiceLoader.loadInstalled(DefaultLoggerFinder.class).iterator();
+            iterator = AccessController.doPrivileged(pa, null,
+                    LOGGERFINDER_PERMISSION, CLASSLOADER_PERMISSION,
+                    READ_PERMISSION);
+        }
+        DefaultLoggerFinder result = null;
+        try {
+            // Iterator iterates with the access control context stored
+            // at ServiceLoader creation time.
+            if (iterator.hasNext()) {
+                result = iterator.next();
+            }
+        } catch (RuntimeException x) {
+            throw new ServiceConfigurationError(
+                    "Failed to instantiate default LoggerFinder", x);
+        }
+        if (result == null) {
+            result = new DefaultLoggerFinder();
+        }
+        return result;
+    }
+
+    public static System.LoggerFinder getLoggerFinder() {
+        @SuppressWarnings("removal")
+        final SecurityManager sm = System.getSecurityManager();
+        if (sm != null) {
+            sm.checkPermission(LOGGERFINDER_PERMISSION);
+        }
+        return service();
+    }
+
+}
diff --git a/tests/test_data/std/jdk/internal/logger/LoggerWrapper.class b/tests/test_data/std/jdk/internal/logger/LoggerWrapper.class
new file mode 100644
index 0000000000000000000000000000000000000000..e3fe71fc4486901dd97b5381e3293edae560e64f
GIT binary patch
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/logger/LoggerWrapper.java b/tests/test_data/std/jdk/internal/logger/LoggerWrapper.java
new file mode 100644
index 00000000..09ba3a50
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/logger/LoggerWrapper.java
@@ -0,0 +1,65 @@
+/*
+ * Copyright (c) 2015, 2020, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+
+package jdk.internal.logger;
+
+import java.util.Objects;
+import java.lang.System.Logger;
+import sun.util.logging.PlatformLogger;
+
+/**
+ * An implementation of {@link Logger} that redirects all calls to a wrapped
+ * instance of Logger.
+ *
+ * @param <L> Type of the wrapped Logger: {@code Logger} or an
+ *            extension of that interface.
+ */
+public class LoggerWrapper<L extends Logger> extends AbstractLoggerWrapper<L> {
+
+    final L wrapped;
+    final PlatformLogger.Bridge platformProxy;
+
+    public LoggerWrapper(L wrapped) {
+        this(Objects.requireNonNull(wrapped), (Void)null);
+    }
+
+    LoggerWrapper(L wrapped, Void unused) {
+        this.wrapped = wrapped;
+        this.platformProxy = (wrapped instanceof PlatformLogger.Bridge) ?
+            (PlatformLogger.Bridge) wrapped : null;
+    }
+
+    @Override
+    public final L wrapped() {
+        return wrapped;
+    }
+
+    @Override
+    public final PlatformLogger.Bridge platformProxy() {
+        return platformProxy;
+    }
+
+}
diff --git a/tests/test_data/std/jdk/internal/logger/SimpleConsoleLogger$CallerFinder$1.class b/tests/test_data/std/jdk/internal/logger/SimpleConsoleLogger$CallerFinder$1.class
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GIT binary patch
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literal 0
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diff --git a/tests/test_data/std/jdk/internal/logger/SimpleConsoleLogger$CallerFinder.class b/tests/test_data/std/jdk/internal/logger/SimpleConsoleLogger$CallerFinder.class
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diff --git a/tests/test_data/std/jdk/internal/logger/SimpleConsoleLogger.java b/tests/test_data/std/jdk/internal/logger/SimpleConsoleLogger.java
new file mode 100644
index 00000000..317e475d
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/logger/SimpleConsoleLogger.java
@@ -0,0 +1,557 @@
+/*
+ * Copyright (c) 2015, 2021, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package jdk.internal.logger;
+
+import java.io.PrintStream;
+import java.io.PrintWriter;
+import java.io.StringWriter;
+import java.lang.StackWalker.StackFrame;
+import java.security.AccessController;
+import java.security.PrivilegedAction;
+import java.time.ZonedDateTime;
+import java.util.Optional;
+import java.util.MissingResourceException;
+import java.util.ResourceBundle;
+import java.util.function.Function;
+import java.lang.System.Logger;
+import java.util.function.Predicate;
+import java.util.function.Supplier;
+import sun.security.action.GetPropertyAction;
+import sun.util.logging.PlatformLogger;
+import sun.util.logging.PlatformLogger.ConfigurableBridge.LoggerConfiguration;
+
+/**
+ * A simple console logger to emulate the behavior of JUL loggers when
+ * in the default configuration. SimpleConsoleLoggers are also used when
+ * JUL is not present and no DefaultLoggerFinder is installed.
+ */
+public class SimpleConsoleLogger extends LoggerConfiguration
+    implements Logger, PlatformLogger.Bridge, PlatformLogger.ConfigurableBridge {
+
+    static final Level DEFAULT_LEVEL = getDefaultLevel();
+    static final PlatformLogger.Level DEFAULT_PLATFORM_LEVEL =
+            PlatformLogger.toPlatformLevel(DEFAULT_LEVEL);
+
+    static Level getDefaultLevel() {
+        String levelName = GetPropertyAction
+                .privilegedGetProperty("jdk.system.logger.level", "INFO");
+        try {
+            return Level.valueOf(levelName);
+        } catch (IllegalArgumentException iae) {
+            return Level.INFO;
+        }
+    }
+
+    final String name;
+    volatile PlatformLogger.Level  level;
+    final boolean usePlatformLevel;
+    SimpleConsoleLogger(String name, boolean usePlatformLevel) {
+        this.name = name;
+        this.usePlatformLevel = usePlatformLevel;
+    }
+
+    String getSimpleFormatString() {
+        return Formatting.SIMPLE_CONSOLE_LOGGER_FORMAT;
+    }
+
+    PlatformLogger.Level defaultPlatformLevel() {
+        return DEFAULT_PLATFORM_LEVEL;
+    }
+
+    @Override
+    public final String getName() {
+        return name;
+    }
+
+    private Enum<?> logLevel(PlatformLogger.Level level) {
+        return usePlatformLevel ? level : level.systemLevel();
+    }
+
+    private Enum<?> logLevel(Level level) {
+        return usePlatformLevel ? PlatformLogger.toPlatformLevel(level) : level;
+    }
+
+    // ---------------------------------------------------
+    //                 From Logger
+    // ---------------------------------------------------
+
+    @Override
+    public final boolean isLoggable(Level level) {
+        return isLoggable(PlatformLogger.toPlatformLevel(level));
+    }
+
+    @Override
+    public final void log(Level level, ResourceBundle bundle, String key, Throwable thrown) {
+        if (isLoggable(level)) {
+            if (bundle != null) {
+                key = getString(bundle, key);
+            }
+            publish(getCallerInfo(), logLevel(level), key, thrown);
+        }
+    }
+
+    @Override
+    public final void log(Level level, ResourceBundle bundle, String format, Object... params) {
+        if (isLoggable(level)) {
+            if (bundle != null) {
+                format = getString(bundle, format);
+            }
+            publish(getCallerInfo(), logLevel(level), format, params);
+        }
+    }
+
+    // ---------------------------------------------------
+    //             From PlatformLogger.Bridge
+    // ---------------------------------------------------
+
+    @Override
+    public final boolean isLoggable(PlatformLogger.Level level) {
+        final PlatformLogger.Level effectiveLevel =  effectiveLevel();
+        return level != PlatformLogger.Level.OFF
+                && level.ordinal() >= effectiveLevel.ordinal();
+    }
+
+    @Override
+    public final boolean isEnabled() {
+        return level != PlatformLogger.Level.OFF;
+    }
+
+    @Override
+    public final void log(PlatformLogger.Level level, String msg) {
+        if (isLoggable(level)) {
+            publish(getCallerInfo(), logLevel(level), msg);
+        }
+    }
+
+    @Override
+    public final void log(PlatformLogger.Level level, String msg, Throwable thrown) {
+        if (isLoggable(level)) {
+            publish(getCallerInfo(), logLevel(level), msg, thrown);
+        }
+    }
+
+    @Override
+    public final void log(PlatformLogger.Level level, String msg, Object... params) {
+        if (isLoggable(level)) {
+            publish(getCallerInfo(), logLevel(level), msg, params);
+        }
+    }
+
+    private PlatformLogger.Level effectiveLevel() {
+        if (level == null) return defaultPlatformLevel();
+        return level;
+    }
+
+    @Override
+    public final PlatformLogger.Level getPlatformLevel() {
+        return level;
+    }
+
+    @Override
+    public final void setPlatformLevel(PlatformLogger.Level newLevel) {
+        level = newLevel;
+    }
+
+    @Override
+    public final LoggerConfiguration getLoggerConfiguration() {
+        return this;
+    }
+
+    /**
+     * Default platform logging support - output messages to System.err -
+     * equivalent to ConsoleHandler with SimpleFormatter.
+     */
+    static PrintStream outputStream() {
+        return System.err;
+    }
+
+    // Returns the caller's class and method's name; best effort
+    // if cannot infer, return the logger's name.
+    private String getCallerInfo() {
+        Optional<StackWalker.StackFrame> frame = new CallerFinder().get();
+        if (frame.isPresent()) {
+            return frame.get().getClassName() + " " + frame.get().getMethodName();
+        } else {
+            return name;
+        }
+    }
+
+    /*
+     * CallerFinder is a stateful predicate.
+     */
+    @SuppressWarnings("removal")
+    static final class CallerFinder implements Predicate<StackWalker.StackFrame> {
+        private static final StackWalker WALKER;
+        static {
+            final PrivilegedAction<StackWalker> action = new PrivilegedAction<>() {
+                @Override
+                public StackWalker run() {
+                    return StackWalker.getInstance(StackWalker.Option.RETAIN_CLASS_REFERENCE);
+                }
+            };
+            WALKER = AccessController.doPrivileged(action);
+        }
+
+        /**
+         * Returns StackFrame of the caller's frame.
+         * @return StackFrame of the caller's frame.
+         */
+        Optional<StackWalker.StackFrame> get() {
+            return WALKER.walk((s) -> s.filter(this).findFirst());
+        }
+
+        private boolean lookingForLogger = true;
+        /**
+         * Returns true if we have found the caller's frame, false if the frame
+         * must be skipped.
+         *
+         * @param t The frame info.
+         * @return true if we have found the caller's frame, false if the frame
+         * must be skipped.
+         */
+        @Override
+        public boolean test(StackWalker.StackFrame t) {
+            final String cname = t.getClassName();
+            // We should skip all frames until we have found the logger,
+            // because these frames could be frames introduced by e.g. custom
+            // sub classes of Handler.
+            if (lookingForLogger) {
+                // Skip all frames until we have found the first logger frame.
+                lookingForLogger = !isLoggerImplFrame(cname);
+                return false;
+            }
+            // Continue walking until we've found the relevant calling frame.
+            // Skips logging/logger infrastructure.
+            return !Formatting.isFilteredFrame(t);
+        }
+
+        private boolean isLoggerImplFrame(String cname) {
+            return (cname.equals("sun.util.logging.PlatformLogger") ||
+                    cname.equals("jdk.internal.logger.SimpleConsoleLogger"));
+        }
+    }
+
+    private String getCallerInfo(String sourceClassName, String sourceMethodName) {
+        if (sourceClassName == null) return name;
+        if (sourceMethodName == null) return sourceClassName;
+        return sourceClassName + " " + sourceMethodName;
+    }
+
+    private String toString(Throwable thrown) {
+        String throwable = "";
+        if (thrown != null) {
+            StringWriter sw = new StringWriter();
+            PrintWriter pw = new PrintWriter(sw);
+            pw.println();
+            thrown.printStackTrace(pw);
+            pw.close();
+            throwable = sw.toString();
+        }
+        return throwable;
+    }
+
+    private synchronized String format(Enum<?> level,
+            String msg, Throwable thrown, String callerInfo) {
+
+        ZonedDateTime zdt = ZonedDateTime.now();
+        String throwable = toString(thrown);
+
+        return String.format(getSimpleFormatString(),
+                         zdt,
+                         callerInfo,
+                         name,
+                         level.name(),
+                         msg,
+                         throwable);
+    }
+
+    // publish accepts both PlatformLogger Levels and LoggerFinder Levels.
+    private void publish(String callerInfo, Enum<?> level, String msg) {
+        outputStream().print(format(level, msg, null, callerInfo));
+    }
+    // publish accepts both PlatformLogger Levels and LoggerFinder Levels.
+    private void publish(String callerInfo, Enum<?> level, String msg, Throwable thrown) {
+        outputStream().print(format(level, msg, thrown, callerInfo));
+    }
+    // publish accepts both PlatformLogger Levels and LoggerFinder Levels.
+    private void publish(String callerInfo, Enum<?> level, String msg, Object... params) {
+        msg = params == null || params.length == 0 ? msg
+                : Formatting.formatMessage(msg, params);
+        outputStream().print(format(level, msg, null, callerInfo));
+    }
+
+    public static SimpleConsoleLogger makeSimpleLogger(String name) {
+        return new SimpleConsoleLogger(name, false);
+    }
+
+    @Override
+    public final void log(PlatformLogger.Level level, Supplier<String> msgSupplier) {
+        if (isLoggable(level)) {
+            publish(getCallerInfo(), logLevel(level), msgSupplier.get());
+        }
+    }
+
+    @Override
+    public final void log(PlatformLogger.Level level, Throwable thrown,
+            Supplier<String> msgSupplier) {
+        if (isLoggable(level)) {
+            publish(getCallerInfo(), logLevel(level), msgSupplier.get(), thrown);
+        }
+    }
+
+    @Override
+    public final void logp(PlatformLogger.Level level, String sourceClass,
+            String sourceMethod, String msg) {
+        if (isLoggable(level)) {
+            publish(getCallerInfo(sourceClass, sourceMethod), logLevel(level), msg);
+        }
+    }
+
+    @Override
+    public final void logp(PlatformLogger.Level level, String sourceClass,
+            String sourceMethod, Supplier<String> msgSupplier) {
+        if (isLoggable(level)) {
+            publish(getCallerInfo(sourceClass, sourceMethod), logLevel(level), msgSupplier.get());
+        }
+    }
+
+    @Override
+    public final void logp(PlatformLogger.Level level, String sourceClass, String sourceMethod,
+            String msg, Object... params) {
+        if (isLoggable(level)) {
+            publish(getCallerInfo(sourceClass, sourceMethod), logLevel(level), msg, params);
+        }
+    }
+
+    @Override
+    public final void logp(PlatformLogger.Level level, String sourceClass,
+            String sourceMethod, String msg, Throwable thrown) {
+        if (isLoggable(level)) {
+            publish(getCallerInfo(sourceClass, sourceMethod), logLevel(level), msg, thrown);
+        }
+    }
+
+    @Override
+    public final void logp(PlatformLogger.Level level, String sourceClass,
+            String sourceMethod, Throwable thrown, Supplier<String> msgSupplier) {
+        if (isLoggable(level)) {
+            publish(getCallerInfo(sourceClass, sourceMethod), logLevel(level), msgSupplier.get(), thrown);
+        }
+    }
+
+    @Override
+    public final void logrb(PlatformLogger.Level level, String sourceClass,
+            String sourceMethod, ResourceBundle bundle, String key, Object... params) {
+        if (isLoggable(level)) {
+            String msg = bundle == null ? key : getString(bundle, key);
+            publish(getCallerInfo(sourceClass, sourceMethod), logLevel(level), msg, params);
+        }
+    }
+
+    @Override
+    public final void logrb(PlatformLogger.Level level, String sourceClass,
+            String sourceMethod, ResourceBundle bundle, String key, Throwable thrown) {
+        if (isLoggable(level)) {
+            String msg = bundle == null ? key : getString(bundle, key);
+            publish(getCallerInfo(sourceClass, sourceMethod), logLevel(level), msg, thrown);
+        }
+    }
+
+    @Override
+    public final void logrb(PlatformLogger.Level level, ResourceBundle bundle,
+            String key, Object... params) {
+        if (isLoggable(level)) {
+            String msg = bundle == null ? key : getString(bundle,key);
+            publish(getCallerInfo(), logLevel(level), msg, params);
+        }
+    }
+
+    @Override
+    public final void logrb(PlatformLogger.Level level, ResourceBundle bundle,
+            String key, Throwable thrown) {
+        if (isLoggable(level)) {
+            String msg = bundle == null ? key : getString(bundle,key);
+            publish(getCallerInfo(), logLevel(level), msg, thrown);
+        }
+    }
+
+    static String getString(ResourceBundle bundle, String key) {
+        if (bundle == null || key == null) return key;
+        try {
+            return bundle.getString(key);
+        } catch (MissingResourceException x) {
+            // Emulate what java.util.logging Formatters do
+            // We don't want unchecked exception to propagate up to
+            // the caller's code.
+            return key;
+        }
+    }
+
+    static final class Formatting {
+        // The default simple log format string.
+        // Used both by SimpleConsoleLogger when java.logging is not present,
+        // and by SurrogateLogger and java.util.logging.SimpleFormatter when
+        // java.logging is present.
+        static final String DEFAULT_FORMAT =
+            "%1$tb %1$td, %1$tY %1$tl:%1$tM:%1$tS %1$Tp %2$s%n%4$s: %5$s%6$s%n";
+
+        // The system property key that allows to change the default log format
+        // when java.logging is not present. This is used to control the formatting
+        // of the SimpleConsoleLogger.
+        static final String DEFAULT_FORMAT_PROP_KEY =
+            "jdk.system.logger.format";
+
+        // The system property key that allows to change the default log format
+        // when java.logging is present. This is used to control the formatting
+        // of the SurrogateLogger (used before java.util.logging.LogManager is
+        // initialized) and the java.util.logging.SimpleFormatter (used after
+        // java.util.logging.LogManager is  initialized).
+        static final String JUL_FORMAT_PROP_KEY =
+            "java.util.logging.SimpleFormatter.format";
+
+        // The simple console logger format string
+        static final String SIMPLE_CONSOLE_LOGGER_FORMAT =
+                getSimpleFormat(DEFAULT_FORMAT_PROP_KEY, null);
+
+        // Make it easier to wrap Logger...
+        private static final String[] skips;
+        static {
+            String additionalPkgs =
+                    GetPropertyAction.privilegedGetProperty("jdk.logger.packages");
+            skips = additionalPkgs == null ? new String[0] : additionalPkgs.split(",");
+        }
+
+        static boolean isFilteredFrame(StackFrame st) {
+            // skip logging/logger infrastructure
+            if (System.Logger.class.isAssignableFrom(st.getDeclaringClass())) {
+                return true;
+            }
+
+            // fast escape path: all the prefixes below start with 's' or 'j' and
+            // have more than 12 characters.
+            final String cname = st.getClassName();
+            char c = cname.length() < 12 ? 0 : cname.charAt(0);
+            if (c == 's') {
+                // skip internal machinery classes
+                if (cname.startsWith("sun.util.logging."))   return true;
+                if (cname.startsWith("sun.rmi.runtime.Log")) return true;
+            } else if (c == 'j') {
+                // Message delayed at Bootstrap: no need to go further up.
+                if (cname.startsWith("jdk.internal.logger.BootstrapLogger$LogEvent")) return false;
+                // skip public machinery classes
+                if (cname.startsWith("jdk.internal.logger."))          return true;
+                if (cname.startsWith("java.util.logging."))            return true;
+                if (cname.startsWith("java.lang.invoke.MethodHandle")) return true;
+                if (cname.startsWith("java.security.AccessController")) return true;
+            }
+
+            // check additional prefixes if any are specified.
+            if (skips.length > 0) {
+                for (int i=0; i<skips.length; i++) {
+                    if (!skips[i].isEmpty() && cname.startsWith(skips[i])) {
+                        return true;
+                    }
+                }
+            }
+
+            return false;
+        }
+
+        static String getSimpleFormat(String key, Function<String, String> defaultPropertyGetter) {
+            // Double check that 'key' is one of the expected property names:
+            // - DEFAULT_FORMAT_PROP_KEY is used to control the
+            //   SimpleConsoleLogger format when java.logging is
+            //   not present.
+            // - JUL_FORMAT_PROP_KEY is used when this method is called
+            //   from the SurrogateLogger subclass. It is used to control the
+            //   SurrogateLogger format and java.util.logging.SimpleFormatter
+            //   format when java.logging is present.
+            // This method should not be called with any other key.
+            if (!DEFAULT_FORMAT_PROP_KEY.equals(key)
+                    && !JUL_FORMAT_PROP_KEY.equals(key)) {
+                throw new IllegalArgumentException("Invalid property name: " + key);
+            }
+
+            // Do not use any lambda in this method. Using a lambda here causes
+            //    jdk/test/java/lang/invoke/lambda/LogGeneratedClassesTest.java
+            // to fail - because that test has a testcase which somehow references
+            // PlatformLogger and counts the number of generated lambda classes.
+            String format = GetPropertyAction.privilegedGetProperty(key);
+
+            if (format == null && defaultPropertyGetter != null) {
+                format = defaultPropertyGetter.apply(key);
+            }
+            if (format != null) {
+                try {
+                    // validate the user-defined format string
+                    String.format(format, ZonedDateTime.now(), "", "", "", "", "");
+                } catch (IllegalArgumentException e) {
+                    // illegal syntax; fall back to the default format
+                    format = DEFAULT_FORMAT;
+                }
+            } else {
+                format = DEFAULT_FORMAT;
+            }
+            return format;
+        }
+
+
+        // Copied from java.util.logging.Formatter.formatMessage
+        static String formatMessage(String format, Object... parameters) {
+            // Do the formatting.
+            try {
+                if (parameters == null || parameters.length == 0) {
+                    // No parameters.  Just return format string.
+                    return format;
+                }
+                // Is it a java.text style format?
+                // Ideally we could match with
+                // Pattern.compile("\\{\\d").matcher(format).find())
+                // However the cost is 14% higher, so we cheaply check for
+                //
+                boolean isJavaTestFormat = false;
+                final int len = format.length();
+                for (int i=0; i<len-2; i++) {
+                    final char c = format.charAt(i);
+                    if (c == '{') {
+                        final int d = format.charAt(i+1);
+                        if (d >= '0' && d <= '9') {
+                            isJavaTestFormat = true;
+                            break;
+                        }
+                    }
+                }
+                if (isJavaTestFormat) {
+                    return java.text.MessageFormat.format(format, parameters);
+                }
+                return format;
+            } catch (Exception ex) {
+                // Formatting failed: use format string.
+                return format;
+            }
+        }
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/logger/SurrogateLogger.class b/tests/test_data/std/jdk/internal/logger/SurrogateLogger.class
new file mode 100644
index 0000000000000000000000000000000000000000..c129db5ba6d770a48ac747967d7329d9741c09d3
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/logger/SurrogateLogger.java b/tests/test_data/std/jdk/internal/logger/SurrogateLogger.java
new file mode 100644
index 00000000..8507cb5d
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/logger/SurrogateLogger.java
@@ -0,0 +1,72 @@
+/*
+ * Copyright (c) 2016, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package jdk.internal.logger;
+
+import java.util.function.Function;
+import sun.util.logging.PlatformLogger;
+
+/**
+ * A simple console logger used to emulate the behavior of JUL loggers when
+ * java.util.logging has no custom configuration.
+ * Surrogate loggers are usually only used temporarily, until the LogManager
+ * is initialized. At this point, the surrogates are replaced by an actual
+ * logger obtained from LogManager.
+ */
+public final class SurrogateLogger extends SimpleConsoleLogger {
+
+    private static final PlatformLogger.Level JUL_DEFAULT_LEVEL =
+            PlatformLogger.Level.INFO;
+    private static volatile String simpleFormatString;
+
+    SurrogateLogger(String name) {
+        super(name, true);
+    }
+
+    @Override
+    PlatformLogger.Level defaultPlatformLevel() {
+        return JUL_DEFAULT_LEVEL;
+    }
+
+    @Override
+    String getSimpleFormatString() {
+        if (simpleFormatString == null) {
+            simpleFormatString = getSimpleFormat(null);
+        }
+        return simpleFormatString;
+    }
+
+    public static String getSimpleFormat(Function<String, String> defaultPropertyGetter) {
+        return Formatting.getSimpleFormat(Formatting.JUL_FORMAT_PROP_KEY, defaultPropertyGetter);
+    }
+
+    public static SurrogateLogger makeSurrogateLogger(String name) {
+        return new SurrogateLogger(name);
+    }
+
+    public static boolean isFilteredFrame(StackWalker.StackFrame st) {
+        return Formatting.isFilteredFrame(st);
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/logger/package-info.java b/tests/test_data/std/jdk/internal/logger/package-info.java
new file mode 100644
index 00000000..46b571aa
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/logger/package-info.java
@@ -0,0 +1,68 @@
+/*
+ * Copyright (c) 2015, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/**
+ * <b>[JDK INTERNAL]</b>
+ * The {@code jdk.internal.logger} package defines an internal provider
+ * whose default naive implementation is replaced by the {@code java.logging}
+ * module when the {@code java.logging} module is present.
+ * <p>
+ * <b>Default Implementation</b>
+ * <p>
+ * The JDK default implementation of the System.LoggerFinder will attempt to
+ * load an installed instance of the {@link jdk.internal.logger.DefaultLoggerFinder}
+ * defined in this package.
+ * When the {@code java.util.logging} package is present, this will usually
+ * resolve to an instance of {@link sun.util.logging.internal.LoggingProviderImpl} -
+ * which provides an implementation of the Logger whose backend is a
+ * {@link java.util.logging.Logger java.util.logging.Logger}.
+ * Configuration can thus be performed by direct access to the regular
+ * {@code java.util.logging} APIs,
+ * using {@link java.util.logging.Logger java.util.logging.Logger} and
+ * {@link java.util.logging.LogManager} to access and configure the backend
+ * Loggers.
+ * <br>
+ * If however {@code java.util.logging} is not linked with the application, then
+ * the default implementation will return a simple logger that will print out
+ * all log messages of INFO level and above to the console ({@code System.err}),
+ * as implemented by the base {@link jdk.internal.logger.DefaultLoggerFinder} class.
+ * <p>
+ * <b>Message Levels and Mapping to java.util.logging</b>
+ * <p>
+ * The {@link java.lang.System.LoggerFinder} class documentation describe how
+ * {@linkplain java.lang.System.Logger.Level System.Logger levels} are mapped
+ * to {@linkplain java.util.logging.Level JUL levels} when {@code
+ * java.util.logging} is the backend.
+ *
+ * @see jdk.internal.logger.DefaultLoggerFinder
+ * @see sun.util.logging.internal.LoggingProviderImpl
+ * @see java.lang.System.LoggerFinder
+ * @see java.lang.System.Logger
+ * @see sun.util.logging.PlatformLogger.Bridge
+ * @see sun.util.logging.internal
+ *
+ * @since 9
+ */
+package jdk.internal.logger;
diff --git a/tests/test_data/std/jdk/internal/math/DoubleConsts.class b/tests/test_data/std/jdk/internal/math/DoubleConsts.class
new file mode 100644
index 0000000000000000000000000000000000000000..190beae83fe1a72b06a2ffa61353af82a7827692
GIT binary patch
literal 670
zcmaKp%TC)+5QhJg#Bm6rAwX3^RRokf5?-+?s+0>*w~49bG_b-t2^KgQTS^?Z^p(1*
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z-AWkrqMnYFz-&j}NyC@H)!3Is8oG{54pYef<3DY6+;$|8KJ)@FdM}XN-f0RHZ1co2
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/math/DoubleConsts.java b/tests/test_data/std/jdk/internal/math/DoubleConsts.java
new file mode 100644
index 00000000..d3a271fd
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/math/DoubleConsts.java
@@ -0,0 +1,95 @@
+/*
+ * Copyright (c) 2003, 2022, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package jdk.internal.math;
+
+import static java.lang.Double.MIN_EXPONENT;
+import static java.lang.Double.PRECISION;
+import static java.lang.Double.SIZE;
+
+/**
+ * This class contains additional constants documenting limits of the
+ * {@code double} type.
+ *
+ * @author Joseph D. Darcy
+ */
+
+public class DoubleConsts {
+    /**
+     * Don't let anyone instantiate this class.
+     */
+    private DoubleConsts() {}
+
+    /**
+     * The number of logical bits in the significand of a
+     * {@code double} number, including the implicit bit.
+     */
+    public static final int SIGNIFICAND_WIDTH = PRECISION;
+
+    /**
+     * The exponent the smallest positive {@code double}
+     * subnormal value would have if it could be normalized..
+     */
+    public static final int MIN_SUB_EXPONENT =
+            MIN_EXPONENT - (SIGNIFICAND_WIDTH - 1); // -1074
+
+    /**
+     * Bias used in representing a {@code double} exponent.
+     */
+    public static final int EXP_BIAS =
+            (1 << (SIZE - SIGNIFICAND_WIDTH - 1)) - 1; // 1023
+
+    /**
+     * Bit mask to isolate the sign bit of a {@code double}.
+     */
+    public static final long SIGN_BIT_MASK = 1L << (SIZE - 1);
+
+    /**
+     * Bit mask to isolate the exponent field of a {@code double}.
+     */
+    public static final long EXP_BIT_MASK =
+            ((1L << (SIZE - SIGNIFICAND_WIDTH)) - 1) << (SIGNIFICAND_WIDTH - 1);
+
+    /**
+     * Bit mask to isolate the significand field of a {@code double}.
+     */
+    public static final long SIGNIF_BIT_MASK = (1L << (SIGNIFICAND_WIDTH - 1)) - 1;
+
+    /**
+     * Bit mask to isolate the magnitude bits (combined exponent and
+     * significand fields) of a {@code double}.
+     */
+    public static final long MAG_BIT_MASK = EXP_BIT_MASK | SIGNIF_BIT_MASK;
+
+    static {
+        // verify bit masks cover all bit positions and that the bit
+        // masks are non-overlapping
+        assert(((SIGN_BIT_MASK | EXP_BIT_MASK | SIGNIF_BIT_MASK) == ~0L) &&
+               (((SIGN_BIT_MASK & EXP_BIT_MASK) == 0L) &&
+                ((SIGN_BIT_MASK & SIGNIF_BIT_MASK) == 0L) &&
+                ((EXP_BIT_MASK & SIGNIF_BIT_MASK) == 0L)) &&
+                ((SIGN_BIT_MASK | MAG_BIT_MASK) == ~0L));
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/math/DoubleToDecimal.class b/tests/test_data/std/jdk/internal/math/DoubleToDecimal.class
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/math/DoubleToDecimal.java b/tests/test_data/std/jdk/internal/math/DoubleToDecimal.java
new file mode 100644
index 00000000..e3472d55
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/math/DoubleToDecimal.java
@@ -0,0 +1,559 @@
+/*
+ * Copyright (c) 2021, 2023, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package jdk.internal.math;
+
+import java.io.IOException;
+
+import static java.lang.Double.*;
+import static java.lang.Long.*;
+import static java.lang.Math.multiplyHigh;
+import static jdk.internal.math.MathUtils.*;
+
+/**
+ * This class exposes a method to render a {@code double} as a string.
+ */
+public final class DoubleToDecimal {
+    /*
+     * For full details about this code see the following references:
+     *
+     * [1] Giulietti, "The Schubfach way to render doubles",
+     *     https://drive.google.com/file/d/1gp5xv4CAa78SVgCeWfGqqI4FfYYYuNFb
+     *
+     * [2] IEEE Computer Society, "IEEE Standard for Floating-Point Arithmetic"
+     *
+     * [3] Bouvier & Zimmermann, "Division-Free Binary-to-Decimal Conversion"
+     *
+     * Divisions are avoided altogether for the benefit of those architectures
+     * that do not provide specific machine instructions or where they are slow.
+     * This is discussed in section 10 of [1].
+     */
+
+    /* The precision in bits */
+    static final int P = PRECISION;
+
+    /* Exponent width in bits */
+    private static final int W = (Double.SIZE - 1) - (P - 1);
+
+    /* Minimum value of the exponent: -(2^(W-1)) - P + 3 */
+    static final int Q_MIN = (-1 << (W - 1)) - P + 3;
+
+    /* Maximum value of the exponent: 2^(W-1) - P */
+    static final int Q_MAX = (1 << (W - 1)) - P;
+
+    /* 10^(E_MIN - 1) <= MIN_VALUE < 10^E_MIN */
+    static final int E_MIN = -323;
+
+    /* 10^(E_MAX - 1) <= MAX_VALUE < 10^E_MAX */
+    static final int E_MAX = 309;
+
+    /* Threshold to detect tiny values, as in section 8.2.1 of [1] */
+    static final long C_TINY = 3;
+
+    /* The minimum and maximum k, as in section 8 of [1] */
+    static final int K_MIN = -324;
+    static final int K_MAX = 292;
+
+    /* H is as in section 8.1 of [1] */
+    static final int H = 17;
+
+    /* Minimum value of the significand of a normal value: 2^(P-1) */
+    private static final long C_MIN = 1L << (P - 1);
+
+    /* Mask to extract the biased exponent */
+    private static final int BQ_MASK = (1 << W) - 1;
+
+    /* Mask to extract the fraction bits */
+    private static final long T_MASK = (1L << (P - 1)) - 1;
+
+    /* Used in rop() */
+    private static final long MASK_63 = (1L << 63) - 1;
+
+    /* Used for left-to-tight digit extraction */
+    private static final int MASK_28 = (1 << 28) - 1;
+
+    private static final int NON_SPECIAL    = 0;
+    private static final int PLUS_ZERO      = 1;
+    private static final int MINUS_ZERO     = 2;
+    private static final int PLUS_INF       = 3;
+    private static final int MINUS_INF      = 4;
+    private static final int NAN            = 5;
+
+    /*
+     * Room for the longer of the forms
+     *     -ddddd.dddddddddddd         H + 2 characters
+     *     -0.00ddddddddddddddddd      H + 5 characters
+     *     -d.ddddddddddddddddE-eee    H + 7 characters
+     * where there are H digits d
+     */
+    public static final int MAX_CHARS = H + 7;
+
+    private final byte[] bytes;
+
+    /* Index into bytes of rightmost valid character */
+    private int index;
+
+    private DoubleToDecimal(boolean noChars) {
+        bytes = noChars ? null : new byte[MAX_CHARS];
+    }
+
+    /**
+     * Returns a string representation of the {@code double}
+     * argument. All characters mentioned below are ASCII characters.
+     *
+     * @param   v   the {@code double} to be converted.
+     * @return a string representation of the argument.
+     * @see Double#toString(double)
+     */
+    public static String toString(double v) {
+        return new DoubleToDecimal(false).toDecimalString(v);
+    }
+
+    /**
+     * Splits the decimal <i>d</i> described in
+     * {@link Double#toString(double)} in integers <i>f</i> and <i>e</i>
+     * such that <i>d</i> = <i>f</i> 10<sup><i>e</i></sup>.
+     *
+     * <p>Further, determines integer <i>n</i> such that <i>n</i> = 0 when
+     * <i>f</i> = 0, and
+     * 10<sup><i>n</i>-1</sup> &le; <i>f</i> &lt; 10<sup><i>n</i></sup>
+     * otherwise.
+     *
+     * <p>The argument {@code v} is assumed to be a positive finite value or
+     * positive zero.
+     * Further, {@code fd} must not be {@code null}.
+     *
+     * @param v     the finite {@code double} to be split.
+     * @param fd    the object that will carry <i>f</i>, <i>e</i>, and <i>n</i>.
+     */
+    public static void split(double v, FormattedFPDecimal fd) {
+        new DoubleToDecimal(true).toDecimal(v, fd);
+    }
+
+    /**
+     * Appends the rendering of the {@code v} to {@code app}.
+     *
+     * <p>The outcome is the same as if {@code v} were first
+     * {@link #toString(double) rendered} and the resulting string were then
+     * {@link Appendable#append(CharSequence) appended} to {@code app}.
+     *
+     * @param v the {@code double} whose rendering is appended.
+     * @param app the {@link Appendable} to append to.
+     * @throws IOException If an I/O error occurs
+     */
+    public static Appendable appendTo(double v, Appendable app)
+            throws IOException {
+        return new DoubleToDecimal(false).appendDecimalTo(v, app);
+    }
+
+    private String toDecimalString(double v) {
+        return switch (toDecimal(v, null)) {
+            case NON_SPECIAL -> charsToString();
+            case PLUS_ZERO -> "0.0";
+            case MINUS_ZERO -> "-0.0";
+            case PLUS_INF -> "Infinity";
+            case MINUS_INF -> "-Infinity";
+            default -> "NaN";
+        };
+    }
+
+    private Appendable appendDecimalTo(double v, Appendable app)
+            throws IOException {
+        switch (toDecimal(v, null)) {
+            case NON_SPECIAL:
+                char[] chars = new char[index + 1];
+                for (int i = 0; i < chars.length; ++i) {
+                    chars[i] = (char) bytes[i];
+                }
+                if (app instanceof StringBuilder builder) {
+                    return builder.append(chars);
+                }
+                if (app instanceof StringBuffer buffer) {
+                    return buffer.append(chars);
+                }
+                for (char c : chars) {
+                    app.append(c);
+                }
+                return app;
+            case PLUS_ZERO: return app.append("0.0");
+            case MINUS_ZERO: return app.append("-0.0");
+            case PLUS_INF: return app.append("Infinity");
+            case MINUS_INF: return app.append("-Infinity");
+            default: return app.append("NaN");
+        }
+    }
+
+    /*
+     * Returns
+     *     PLUS_ZERO       iff v is 0.0
+     *     MINUS_ZERO      iff v is -0.0
+     *     PLUS_INF        iff v is POSITIVE_INFINITY
+     *     MINUS_INF       iff v is NEGATIVE_INFINITY
+     *     NAN             iff v is NaN
+     */
+    private int toDecimal(double v, FormattedFPDecimal fd) {
+        /*
+         * For full details see references [2] and [1].
+         *
+         * For finite v != 0, determine integers c and q such that
+         *     |v| = c 2^q    and
+         *     Q_MIN <= q <= Q_MAX    and
+         *         either    2^(P-1) <= c < 2^P                 (normal)
+         *         or        0 < c < 2^(P-1)  and  q = Q_MIN    (subnormal)
+         */
+        long bits = doubleToRawLongBits(v);
+        long t = bits & T_MASK;
+        int bq = (int) (bits >>> P - 1) & BQ_MASK;
+        if (bq < BQ_MASK) {
+            index = -1;
+            if (bits < 0) {
+                /*
+                 * fd != null implies bytes == null and bits >= 0
+                 * Thus, when fd != null, control never reaches here.
+                 */
+                append('-');
+            }
+            if (bq != 0) {
+                /* normal value. Here mq = -q */
+                int mq = -Q_MIN + 1 - bq;
+                long c = C_MIN | t;
+                /* The fast path discussed in section 8.3 of [1] */
+                if (0 < mq & mq < P) {
+                    long f = c >> mq;
+                    if (f << mq == c) {
+                        return toChars(f, 0, fd);
+                    }
+                }
+                return toDecimal(-mq, c, 0, fd);
+            }
+            if (t != 0) {
+                /* subnormal value */
+                return t < C_TINY
+                       ? toDecimal(Q_MIN, 10 * t, -1, fd)
+                       : toDecimal(Q_MIN, t, 0, fd);
+            }
+            return bits == 0 ? PLUS_ZERO : MINUS_ZERO;
+        }
+        if (t != 0) {
+            return NAN;
+        }
+        return bits > 0 ? PLUS_INF : MINUS_INF;
+    }
+
+    private int toDecimal(int q, long c, int dk, FormattedFPDecimal fd) {
+        /*
+         * The skeleton corresponds to figure 7 of [1].
+         * The efficient computations are those summarized in figure 9.
+         *
+         * Here's a correspondence between Java names and names in [1],
+         * expressed as approximate LaTeX source code and informally.
+         * Other names are identical.
+         * cb:     \bar{c}     "c-bar"
+         * cbr:    \bar{c}_r   "c-bar-r"
+         * cbl:    \bar{c}_l   "c-bar-l"
+         *
+         * vb:     \bar{v}     "v-bar"
+         * vbr:    \bar{v}_r   "v-bar-r"
+         * vbl:    \bar{v}_l   "v-bar-l"
+         *
+         * rop:    r_o'        "r-o-prime"
+         */
+        int out = (int) c & 0x1;
+        long cb = c << 2;
+        long cbr = cb + 2;
+        long cbl;
+        int k;
+        /*
+         * flog10pow2(e) = floor(log_10(2^e))
+         * flog10threeQuartersPow2(e) = floor(log_10(3/4 2^e))
+         * flog2pow10(e) = floor(log_2(10^e))
+         */
+        if (c != C_MIN | q == Q_MIN) {
+            /* regular spacing */
+            cbl = cb - 2;
+            k = flog10pow2(q);
+        } else {
+            /* irregular spacing */
+            cbl = cb - 1;
+            k = flog10threeQuartersPow2(q);
+        }
+        int h = q + flog2pow10(-k) + 2;
+
+        /* g1 and g0 are as in section 9.8.3 of [1], so g = g1 2^63 + g0 */
+        long g1 = g1(k);
+        long g0 = g0(k);
+
+        long vb = rop(g1, g0, cb << h);
+        long vbl = rop(g1, g0, cbl << h);
+        long vbr = rop(g1, g0, cbr << h);
+
+        long s = vb >> 2;
+        if (s >= 100) {
+            /*
+             * For n = 17, m = 1 the table in section 10 of [1] shows
+             *     s' = floor(s / 10) = floor(s 115_292_150_460_684_698 / 2^60)
+             *        = floor(s 115_292_150_460_684_698 2^4 / 2^64)
+             *
+             * sp10 = 10 s'
+             * tp10 = 10 t'
+             * upin    iff    u' = sp10 10^k in Rv
+             * wpin    iff    w' = tp10 10^k in Rv
+             * See section 9.3 of [1].
+             */
+            long sp10 = 10 * multiplyHigh(s, 115_292_150_460_684_698L << 4);
+            long tp10 = sp10 + 10;
+            boolean upin = vbl + out <= sp10 << 2;
+            boolean wpin = (tp10 << 2) + out <= vbr;
+            if (upin != wpin) {
+                return toChars(upin ? sp10 : tp10, k, fd);
+            }
+        }
+
+        /*
+         * 10 <= s < 100    or    s >= 100  and  u', w' not in Rv
+         * uin    iff    u = s 10^k in Rv
+         * win    iff    w = t 10^k in Rv
+         * See section 9.3 of [1].
+         */
+        long t = s + 1;
+        boolean uin = vbl + out <= s << 2;
+        boolean win = (t << 2) + out <= vbr;
+        if (uin != win) {
+            /* Exactly one of u or w lies in Rv */
+            return toChars(uin ? s : t, k + dk, fd);
+        }
+        /*
+         * Both u and w lie in Rv: determine the one closest to v.
+         * See section 9.3 of [1].
+         */
+        long cmp = vb - (s + t << 1);
+        return toChars(cmp < 0 || cmp == 0 && (s & 0x1) == 0 ? s : t, k + dk, fd);
+    }
+
+    /*
+     * Computes rop(cp g 2^(-127)), where g = g1 2^63 + g0
+     * See section 9.9 and figure 8 of [1].
+     */
+    private static long rop(long g1, long g0, long cp) {
+        long x1 = multiplyHigh(g0, cp);
+        long y0 = g1 * cp;
+        long y1 = multiplyHigh(g1, cp);
+        long z = (y0 >>> 1) + x1;
+        long vbp = y1 + (z >>> 63);
+        return vbp | (z & MASK_63) + MASK_63 >>> 63;
+    }
+
+    /*
+     * Formats the decimal f 10^e.
+     */
+    private int toChars(long f, int e, FormattedFPDecimal fd) {
+        /*
+         * For details not discussed here see section 10 of [1].
+         *
+         * Determine len such that
+         *     10^(len-1) <= f < 10^len
+         */
+        int len = flog10pow2(Long.SIZE - numberOfLeadingZeros(f));
+        if (f >= pow10(len)) {
+            len += 1;
+        }
+        if (fd != null) {
+            fd.set(f, e, len);
+            return NON_SPECIAL;
+        }
+
+        /*
+         * Let fp and ep be the original f and e, respectively.
+         * Transform f and e to ensure
+         *     10^(H-1) <= f < 10^H
+         *     fp 10^ep = f 10^(e-H) = 0.f 10^e
+         */
+        f *= pow10(H - len);
+        e += len;
+
+        /*
+         * The toChars?() methods perform left-to-right digits extraction
+         * using ints, provided that the arguments are limited to 8 digits.
+         * Therefore, split the H = 17 digits of f into:
+         *     h = the most significant digit of f
+         *     m = the next 8 most significant digits of f
+         *     l = the last 8, least significant digits of f
+         *
+         * For n = 17, m = 8 the table in section 10 of [1] shows
+         *     floor(f / 10^8) = floor(193_428_131_138_340_668 f / 2^84) =
+         *     floor(floor(193_428_131_138_340_668 f / 2^64) / 2^20)
+         * and for n = 9, m = 8
+         *     floor(hm / 10^8) = floor(1_441_151_881 hm / 2^57)
+         */
+        long hm = multiplyHigh(f, 193_428_131_138_340_668L) >>> 20;
+        int l = (int) (f - 100_000_000L * hm);
+        int h = (int) (hm * 1_441_151_881L >>> 57);
+        int m = (int) (hm - 100_000_000 * h);
+
+        if (0 < e && e <= 7) {
+            return toChars1(h, m, l, e);
+        }
+        if (-3 < e && e <= 0) {
+            return toChars2(h, m, l, e);
+        }
+        return toChars3(h, m, l, e);
+    }
+
+    private int toChars1(int h, int m, int l, int e) {
+        /*
+         * 0 < e <= 7: plain format without leading zeroes.
+         * Left-to-right digits extraction:
+         * algorithm 1 in [3], with b = 10, k = 8, n = 28.
+         */
+        appendDigit(h);
+        int y = y(m);
+        int t;
+        int i = 1;
+        for (; i < e; ++i) {
+            t = 10 * y;
+            appendDigit(t >>> 28);
+            y = t & MASK_28;
+        }
+        append('.');
+        for (; i <= 8; ++i) {
+            t = 10 * y;
+            appendDigit(t >>> 28);
+            y = t & MASK_28;
+        }
+        lowDigits(l);
+        return NON_SPECIAL;
+    }
+
+    private int toChars2(int h, int m, int l, int e) {
+        /* -3 < e <= 0: plain format with leading zeroes */
+        appendDigit(0);
+        append('.');
+        for (; e < 0; ++e) {
+            appendDigit(0);
+        }
+        appendDigit(h);
+        append8Digits(m);
+        lowDigits(l);
+        return NON_SPECIAL;
+    }
+
+    private int toChars3(int h, int m, int l, int e) {
+        /* -3 >= e | e > 7: computerized scientific notation */
+        appendDigit(h);
+        append('.');
+        append8Digits(m);
+        lowDigits(l);
+        exponent(e - 1);
+        return NON_SPECIAL;
+    }
+
+    private void lowDigits(int l) {
+        if (l != 0) {
+            append8Digits(l);
+        }
+        removeTrailingZeroes();
+    }
+
+    private void append8Digits(int m) {
+        /*
+         * Left-to-right digits extraction:
+         * algorithm 1 in [3], with b = 10, k = 8, n = 28.
+         */
+        int y = y(m);
+        for (int i = 0; i < 8; ++i) {
+            int t = 10 * y;
+            appendDigit(t >>> 28);
+            y = t & MASK_28;
+        }
+    }
+
+    private void removeTrailingZeroes() {
+        while (bytes[index] == '0') {
+            --index;
+        }
+        /* ... but do not remove the one directly to the right of '.' */
+        if (bytes[index] == '.') {
+            ++index;
+        }
+    }
+
+    private int y(int a) {
+        /*
+         * Algorithm 1 in [3] needs computation of
+         *     floor((a + 1) 2^n / b^k) - 1
+         * with a < 10^8, b = 10, k = 8, n = 28.
+         * Noting that
+         *     (a + 1) 2^n <= 10^8 2^28 < 10^17
+         * For n = 17, m = 8 the table in section 10 of [1] leads to:
+         */
+        return (int) (multiplyHigh(
+                (long) (a + 1) << 28,
+                193_428_131_138_340_668L) >>> 20) - 1;
+    }
+
+    private void exponent(int e) {
+        append('E');
+        if (e < 0) {
+            append('-');
+            e = -e;
+        }
+        if (e < 10) {
+            appendDigit(e);
+            return;
+        }
+        int d;
+        if (e >= 100) {
+            /*
+             * For n = 3, m = 2 the table in section 10 of [1] shows
+             *     floor(e / 100) = floor(1_311 e / 2^17)
+             */
+            d = e * 1_311 >>> 17;
+            appendDigit(d);
+            e -= 100 * d;
+        }
+        /*
+         * For n = 2, m = 1 the table in section 10 of [1] shows
+         *     floor(e / 10) = floor(103 e / 2^10)
+         */
+        d = e * 103 >>> 10;
+        appendDigit(d);
+        appendDigit(e - 10 * d);
+    }
+
+    private void append(int c) {
+        bytes[++index] = (byte) c;
+    }
+
+    private void appendDigit(int d) {
+        bytes[++index] = (byte) ('0' + d);
+    }
+
+    /* Using the deprecated constructor enhances performance */
+    @SuppressWarnings("deprecation")
+    private String charsToString() {
+        return new String(bytes, 0, 0, index + 1);
+    }
+
+}
diff --git a/tests/test_data/std/jdk/internal/math/FDBigInteger.class b/tests/test_data/std/jdk/internal/math/FDBigInteger.class
new file mode 100644
index 0000000000000000000000000000000000000000..fb16813ca439d24714b547dc42365c67c9ea6032
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diff --git a/tests/test_data/std/jdk/internal/math/FDBigInteger.java b/tests/test_data/std/jdk/internal/math/FDBigInteger.java
new file mode 100644
index 00000000..f6d868df
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/math/FDBigInteger.java
@@ -0,0 +1,1521 @@
+/*
+ * Copyright (c) 2013, 2020, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package jdk.internal.math;
+
+import jdk.internal.misc.CDS;
+
+import java.math.BigInteger;
+import java.util.Arrays;
+//@ model import org.jmlspecs.models.JMLMath;
+
+/**
+ * A simple big integer package specifically for floating point base conversion.
+ */
+public /*@ spec_bigint_math @*/ class FDBigInteger {
+
+    //
+    // This class contains many comments that start with "/*@" mark.
+    // They are behavourial specification in
+    // the Java Modelling Language (JML):
+    // http://www.eecs.ucf.edu/~leavens/JML//index.shtml
+    //
+
+    /*@
+    @ public pure model static \bigint UNSIGNED(int v) {
+    @     return v >= 0 ? v : v + (((\bigint)1) << 32);
+    @ }
+    @
+    @ public pure model static \bigint UNSIGNED(long v) {
+    @     return v >= 0 ? v : v + (((\bigint)1) << 64);
+    @ }
+    @
+    @ public pure model static \bigint AP(int[] data, int len) {
+    @     return (\sum int i; 0 <= 0 && i < len; UNSIGNED(data[i]) << (i*32));
+    @ }
+    @
+    @ public pure model static \bigint pow52(int p5, int p2) {
+    @     ghost \bigint v = 1;
+    @     for (int i = 0; i < p5; i++) v *= 5;
+    @     return v << p2;
+    @ }
+    @
+    @ public pure model static \bigint pow10(int p10) {
+    @     return pow52(p10, p10);
+    @ }
+    @*/
+
+    static final int[] SMALL_5_POW;
+
+    static final long[] LONG_5_POW;
+
+    // Maximum size of cache of powers of 5 as FDBigIntegers.
+    private static final int MAX_FIVE_POW = 340;
+
+    // Cache of big powers of 5 as FDBigIntegers.
+    private static final FDBigInteger POW_5_CACHE[];
+
+    // Zero as an FDBigInteger.
+    public static final FDBigInteger ZERO;
+
+    // Archive proxy
+    private static Object[] archivedCaches;
+
+    // Initialize FDBigInteger cache of powers of 5.
+    static {
+        CDS.initializeFromArchive(FDBigInteger.class);
+        Object[] caches = archivedCaches;
+        if (caches == null) {
+            long[] long5pow = {
+                    1L,
+                    5L,
+                    5L * 5,
+                    5L * 5 * 5,
+                    5L * 5 * 5 * 5,
+                    5L * 5 * 5 * 5 * 5,
+                    5L * 5 * 5 * 5 * 5 * 5,
+                    5L * 5 * 5 * 5 * 5 * 5 * 5,
+                    5L * 5 * 5 * 5 * 5 * 5 * 5 * 5,
+                    5L * 5 * 5 * 5 * 5 * 5 * 5 * 5 * 5,
+                    5L * 5 * 5 * 5 * 5 * 5 * 5 * 5 * 5 * 5,
+                    5L * 5 * 5 * 5 * 5 * 5 * 5 * 5 * 5 * 5 * 5,
+                    5L * 5 * 5 * 5 * 5 * 5 * 5 * 5 * 5 * 5 * 5 * 5,
+                    5L * 5 * 5 * 5 * 5 * 5 * 5 * 5 * 5 * 5 * 5 * 5 * 5,
+                    5L * 5 * 5 * 5 * 5 * 5 * 5 * 5 * 5 * 5 * 5 * 5 * 5 * 5,
+                    5L * 5 * 5 * 5 * 5 * 5 * 5 * 5 * 5 * 5 * 5 * 5 * 5 * 5 * 5,
+                    5L * 5 * 5 * 5 * 5 * 5 * 5 * 5 * 5 * 5 * 5 * 5 * 5 * 5 * 5 * 5,
+                    5L * 5 * 5 * 5 * 5 * 5 * 5 * 5 * 5 * 5 * 5 * 5 * 5 * 5 * 5 * 5 * 5,
+                    5L * 5 * 5 * 5 * 5 * 5 * 5 * 5 * 5 * 5 * 5 * 5 * 5 * 5 * 5 * 5 * 5 * 5,
+                    5L * 5 * 5 * 5 * 5 * 5 * 5 * 5 * 5 * 5 * 5 * 5 * 5 * 5 * 5 * 5 * 5 * 5 * 5,
+                    5L * 5 * 5 * 5 * 5 * 5 * 5 * 5 * 5 * 5 * 5 * 5 * 5 * 5 * 5 * 5 * 5 * 5 * 5 * 5,
+                    5L * 5 * 5 * 5 * 5 * 5 * 5 * 5 * 5 * 5 * 5 * 5 * 5 * 5 * 5 * 5 * 5 * 5 * 5 * 5 * 5,
+                    5L * 5 * 5 * 5 * 5 * 5 * 5 * 5 * 5 * 5 * 5 * 5 * 5 * 5 * 5 * 5 * 5 * 5 * 5 * 5 * 5 * 5,
+                    5L * 5 * 5 * 5 * 5 * 5 * 5 * 5 * 5 * 5 * 5 * 5 * 5 * 5 * 5 * 5 * 5 * 5 * 5 * 5 * 5 * 5 * 5,
+                    5L * 5 * 5 * 5 * 5 * 5 * 5 * 5 * 5 * 5 * 5 * 5 * 5 * 5 * 5 * 5 * 5 * 5 * 5 * 5 * 5 * 5 * 5 * 5,
+                    5L * 5 * 5 * 5 * 5 * 5 * 5 * 5 * 5 * 5 * 5 * 5 * 5 * 5 * 5 * 5 * 5 * 5 * 5 * 5 * 5 * 5 * 5 * 5 * 5,
+                    5L * 5 * 5 * 5 * 5 * 5 * 5 * 5 * 5 * 5 * 5 * 5 * 5 * 5 * 5 * 5 * 5 * 5 * 5 * 5 * 5 * 5 * 5 * 5 * 5 * 5,
+                };
+            int[] small5pow = {
+                    1,
+                    5,
+                    5 * 5,
+                    5 * 5 * 5,
+                    5 * 5 * 5 * 5,
+                    5 * 5 * 5 * 5 * 5,
+                    5 * 5 * 5 * 5 * 5 * 5,
+                    5 * 5 * 5 * 5 * 5 * 5 * 5,
+                    5 * 5 * 5 * 5 * 5 * 5 * 5 * 5,
+                    5 * 5 * 5 * 5 * 5 * 5 * 5 * 5 * 5,
+                    5 * 5 * 5 * 5 * 5 * 5 * 5 * 5 * 5 * 5,
+                    5 * 5 * 5 * 5 * 5 * 5 * 5 * 5 * 5 * 5 * 5,
+                    5 * 5 * 5 * 5 * 5 * 5 * 5 * 5 * 5 * 5 * 5 * 5,
+                    5 * 5 * 5 * 5 * 5 * 5 * 5 * 5 * 5 * 5 * 5 * 5 * 5
+                };
+            FDBigInteger[] pow5cache = new FDBigInteger[MAX_FIVE_POW];
+            int i = 0;
+            while (i < small5pow.length) {
+                FDBigInteger pow5 = new FDBigInteger(new int[] { small5pow[i] }, 0);
+                pow5.makeImmutable();
+                pow5cache[i] = pow5;
+                i++;
+            }
+            FDBigInteger prev = pow5cache[i - 1];
+            while (i < MAX_FIVE_POW) {
+                pow5cache[i] = prev = prev.mult(5);
+                prev.makeImmutable();
+                i++;
+            }
+            FDBigInteger zero = new FDBigInteger(new int[0], 0);
+            zero.makeImmutable();
+            archivedCaches = caches = new Object[] {small5pow, long5pow, pow5cache, zero};
+        }
+        SMALL_5_POW = (int[])caches[0];
+        LONG_5_POW = (long[])caches[1];
+        POW_5_CACHE = (FDBigInteger[])caches[2];
+        ZERO = (FDBigInteger)caches[3];
+    }
+
+    // Constant for casting an int to a long via bitwise AND.
+    private static final long LONG_MASK = 0xffffffffL;
+
+    //@ spec_public non_null;
+    private int data[];  // value: data[0] is least significant
+    //@ spec_public;
+    private int offset;  // number of least significant zero padding ints
+    //@ spec_public;
+    private int nWords;  // data[nWords-1]!=0, all values above are zero
+                 // if nWords==0 -> this FDBigInteger is zero
+    //@ spec_public;
+    private boolean isImmutable = false;
+
+    /*@
+     @ public invariant 0 <= nWords && nWords <= data.length && offset >= 0;
+     @ public invariant nWords == 0 ==> offset == 0;
+     @ public invariant nWords > 0 ==> data[nWords - 1] != 0;
+     @ public invariant (\forall int i; nWords <= i && i < data.length; data[i] == 0);
+     @ public pure model \bigint value() {
+     @     return AP(data, nWords) << (offset*32);
+     @ }
+     @*/
+
+    /**
+     * Constructs an <code>FDBigInteger</code> from data and padding. The
+     * <code>data</code> parameter has the least significant <code>int</code> at
+     * the zeroth index. The <code>offset</code> parameter gives the number of
+     * zero <code>int</code>s to be inferred below the least significant element
+     * of <code>data</code>.
+     *
+     * @param data An array containing all non-zero <code>int</code>s of the value.
+     * @param offset An offset indicating the number of zero <code>int</code>s to pad
+     * below the least significant element of <code>data</code>.
+     */
+    /*@
+     @ requires data != null && offset >= 0;
+     @ ensures this.value() == \old(AP(data, data.length) << (offset*32));
+     @ ensures this.data == \old(data);
+     @*/
+    private FDBigInteger(int[] data, int offset) {
+        this.data = data;
+        this.offset = offset;
+        this.nWords = data.length;
+        trimLeadingZeros();
+    }
+
+    /**
+     * Constructs an <code>FDBigInteger</code> from a starting value and some
+     * decimal digits.
+     *
+     * @param lValue The starting value.
+     * @param digits The decimal digits.
+     * @param kDigits The initial index into <code>digits</code>.
+     * @param nDigits The final index into <code>digits</code>.
+     */
+    /*@
+     @ requires digits != null;
+     @ requires 0 <= kDigits && kDigits <= nDigits && nDigits <= digits.length;
+     @ requires (\forall int i; 0 <= i && i < nDigits; '0' <= digits[i] && digits[i] <= '9');
+     @ ensures this.value() == \old(lValue * pow10(nDigits - kDigits) + (\sum int i; kDigits <= i && i < nDigits; (digits[i] - '0') * pow10(nDigits - i - 1)));
+     @*/
+    public FDBigInteger(long lValue, char[] digits, int kDigits, int nDigits) {
+        int n = Math.max((nDigits + 8) / 9, 2);        // estimate size needed.
+        data = new int[n];      // allocate enough space
+        data[0] = (int) lValue;    // starting value
+        data[1] = (int) (lValue >>> 32);
+        offset = 0;
+        nWords = 2;
+        int i = kDigits;
+        int limit = nDigits - 5;       // slurp digits 5 at a time.
+        int v;
+        while (i < limit) {
+            int ilim = i + 5;
+            v = (int) digits[i++] - (int) '0';
+            while (i < ilim) {
+                v = 10 * v + (int) digits[i++] - (int) '0';
+            }
+            multAddMe(100000, v); // ... where 100000 is 10^5.
+        }
+        int factor = 1;
+        v = 0;
+        while (i < nDigits) {
+            v = 10 * v + (int) digits[i++] - (int) '0';
+            factor *= 10;
+        }
+        if (factor != 1) {
+            multAddMe(factor, v);
+        }
+        trimLeadingZeros();
+    }
+
+    /**
+     * Returns an <code>FDBigInteger</code> with the numerical value
+     * <code>5<sup>p5</sup> * 2<sup>p2</sup></code>.
+     *
+     * @param p5 The exponent of the power-of-five factor.
+     * @param p2 The exponent of the power-of-two factor.
+     * @return <code>5<sup>p5</sup> * 2<sup>p2</sup></code>
+     */
+    /*@
+     @ requires p5 >= 0 && p2 >= 0;
+     @ assignable \nothing;
+     @ ensures \result.value() == \old(pow52(p5, p2));
+     @*/
+    public static FDBigInteger valueOfPow52(int p5, int p2) {
+        if (p5 != 0) {
+            if (p2 == 0) {
+                return big5pow(p5);
+            } else if (p5 < SMALL_5_POW.length) {
+                int pow5 = SMALL_5_POW[p5];
+                int wordcount = p2 >> 5;
+                int bitcount = p2 & 0x1f;
+                if (bitcount == 0) {
+                    return new FDBigInteger(new int[]{pow5}, wordcount);
+                } else {
+                    return new FDBigInteger(new int[]{
+                            pow5 << bitcount,
+                            pow5 >>> (32 - bitcount)
+                    }, wordcount);
+                }
+            } else {
+                return big5pow(p5).leftShift(p2);
+            }
+        } else {
+            return valueOfPow2(p2);
+        }
+    }
+
+    /**
+     * Returns an <code>FDBigInteger</code> with the numerical value
+     * <code>value * 5<sup>p5</sup> * 2<sup>p2</sup></code>.
+     *
+     * @param value The constant factor.
+     * @param p5 The exponent of the power-of-five factor.
+     * @param p2 The exponent of the power-of-two factor.
+     * @return <code>value * 5<sup>p5</sup> * 2<sup>p2</sup></code>
+     */
+    /*@
+     @ requires p5 >= 0 && p2 >= 0;
+     @ assignable \nothing;
+     @ ensures \result.value() == \old(UNSIGNED(value) * pow52(p5, p2));
+     @*/
+    public static FDBigInteger valueOfMulPow52(long value, int p5, int p2) {
+        assert p5 >= 0 : p5;
+        assert p2 >= 0 : p2;
+        int v0 = (int) value;
+        int v1 = (int) (value >>> 32);
+        int wordcount = p2 >> 5;
+        int bitcount = p2 & 0x1f;
+        if (p5 != 0) {
+            if (p5 < SMALL_5_POW.length) {
+                long pow5 = SMALL_5_POW[p5] & LONG_MASK;
+                long carry = (v0 & LONG_MASK) * pow5;
+                v0 = (int) carry;
+                carry >>>= 32;
+                carry = (v1 & LONG_MASK) * pow5 + carry;
+                v1 = (int) carry;
+                int v2 = (int) (carry >>> 32);
+                if (bitcount == 0) {
+                    return new FDBigInteger(new int[]{v0, v1, v2}, wordcount);
+                } else {
+                    return new FDBigInteger(new int[]{
+                            v0 << bitcount,
+                            (v1 << bitcount) | (v0 >>> (32 - bitcount)),
+                            (v2 << bitcount) | (v1 >>> (32 - bitcount)),
+                            v2 >>> (32 - bitcount)
+                    }, wordcount);
+                }
+            } else {
+                FDBigInteger pow5 = big5pow(p5);
+                int[] r;
+                if (v1 == 0) {
+                    r = new int[pow5.nWords + 1 + ((p2 != 0) ? 1 : 0)];
+                    mult(pow5.data, pow5.nWords, v0, r);
+                } else {
+                    r = new int[pow5.nWords + 2 + ((p2 != 0) ? 1 : 0)];
+                    mult(pow5.data, pow5.nWords, v0, v1, r);
+                }
+                return (new FDBigInteger(r, pow5.offset)).leftShift(p2);
+            }
+        } else if (p2 != 0) {
+            if (bitcount == 0) {
+                return new FDBigInteger(new int[]{v0, v1}, wordcount);
+            } else {
+                return new FDBigInteger(new int[]{
+                         v0 << bitcount,
+                        (v1 << bitcount) | (v0 >>> (32 - bitcount)),
+                        v1 >>> (32 - bitcount)
+                }, wordcount);
+            }
+        }
+        return new FDBigInteger(new int[]{v0, v1}, 0);
+    }
+
+    /**
+     * Returns an <code>FDBigInteger</code> with the numerical value
+     * <code>2<sup>p2</sup></code>.
+     *
+     * @param p2 The exponent of 2.
+     * @return <code>2<sup>p2</sup></code>
+     */
+    /*@
+     @ requires p2 >= 0;
+     @ assignable \nothing;
+     @ ensures \result.value() == pow52(0, p2);
+     @*/
+    private static FDBigInteger valueOfPow2(int p2) {
+        int wordcount = p2 >> 5;
+        int bitcount = p2 & 0x1f;
+        return new FDBigInteger(new int[]{1 << bitcount}, wordcount);
+    }
+
+    /**
+     * Removes all leading zeros from this <code>FDBigInteger</code> adjusting
+     * the offset and number of non-zero leading words accordingly.
+     */
+    /*@
+     @ requires data != null;
+     @ requires 0 <= nWords && nWords <= data.length && offset >= 0;
+     @ requires nWords == 0 ==> offset == 0;
+     @ ensures nWords == 0 ==> offset == 0;
+     @ ensures nWords > 0 ==> data[nWords - 1] != 0;
+     @*/
+    private /*@ helper @*/ void trimLeadingZeros() {
+        int i = nWords;
+        if (i > 0 && (data[--i] == 0)) {
+            //for (; i > 0 && data[i - 1] == 0; i--) ;
+            while(i > 0 && data[i - 1] == 0) {
+                i--;
+            }
+            this.nWords = i;
+            if (i == 0) { // all words are zero
+                this.offset = 0;
+            }
+        }
+    }
+
+    /**
+     * Retrieves the normalization bias of the <code>FDBigIntger</code>. The
+     * normalization bias is a left shift such that after it the highest word
+     * of the value will have the 4 highest bits equal to zero:
+     * {@code (highestWord & 0xf0000000) == 0}, but the next bit should be 1
+     * {@code (highestWord & 0x08000000) != 0}.
+     *
+     * @return The normalization bias.
+     */
+    /*@
+     @ requires this.value() > 0;
+     @*/
+    public /*@ pure @*/ int getNormalizationBias() {
+        if (nWords == 0) {
+            throw new IllegalArgumentException("Zero value cannot be normalized");
+        }
+        int zeros = Integer.numberOfLeadingZeros(data[nWords - 1]);
+        return (zeros < 4) ? 28 + zeros : zeros - 4;
+    }
+
+    // TODO: Why is anticount param needed if it is always 32 - bitcount?
+    /**
+     * Left shifts the contents of one int array into another.
+     *
+     * @param src The source array.
+     * @param idx The initial index of the source array.
+     * @param result The destination array.
+     * @param bitcount The left shift.
+     * @param anticount The left anti-shift, e.g., <code>32-bitcount</code>.
+     * @param prev The prior source value.
+     */
+    /*@
+     @ requires 0 < bitcount && bitcount < 32 && anticount == 32 - bitcount;
+     @ requires src.length >= idx && result.length > idx;
+     @ assignable result[*];
+     @ ensures AP(result, \old(idx + 1)) == \old((AP(src, idx) + UNSIGNED(prev) << (idx*32)) << bitcount);
+     @*/
+    private static void leftShift(int[] src, int idx, int result[], int bitcount, int anticount, int prev){
+        for (; idx > 0; idx--) {
+            int v = (prev << bitcount);
+            prev = src[idx - 1];
+            v |= (prev >>> anticount);
+            result[idx] = v;
+        }
+        int v = prev << bitcount;
+        result[0] = v;
+    }
+
+    /**
+     * Shifts this <code>FDBigInteger</code> to the left. The shift is performed
+     * in-place unless the <code>FDBigInteger</code> is immutable in which case
+     * a new instance of <code>FDBigInteger</code> is returned.
+     *
+     * @param shift The number of bits to shift left.
+     * @return The shifted <code>FDBigInteger</code>.
+     */
+    /*@
+     @ requires this.value() == 0 || shift == 0;
+     @ assignable \nothing;
+     @ ensures \result == this;
+     @
+     @  also
+     @
+     @ requires this.value() > 0 && shift > 0 && this.isImmutable;
+     @ assignable \nothing;
+     @ ensures \result.value() == \old(this.value() << shift);
+     @
+     @  also
+     @
+     @ requires this.value() > 0 && shift > 0 && this.isImmutable;
+     @ assignable \nothing;
+     @ ensures \result == this;
+     @ ensures \result.value() == \old(this.value() << shift);
+     @*/
+    public FDBigInteger leftShift(int shift) {
+        if (shift == 0 || nWords == 0) {
+            return this;
+        }
+        int wordcount = shift >> 5;
+        int bitcount = shift & 0x1f;
+        if (this.isImmutable) {
+            if (bitcount == 0) {
+                return new FDBigInteger(Arrays.copyOf(data, nWords), offset + wordcount);
+            } else {
+                int anticount = 32 - bitcount;
+                int idx = nWords - 1;
+                int prev = data[idx];
+                int hi = prev >>> anticount;
+                int[] result;
+                if (hi != 0) {
+                    result = new int[nWords + 1];
+                    result[nWords] = hi;
+                } else {
+                    result = new int[nWords];
+                }
+                leftShift(data,idx,result,bitcount,anticount,prev);
+                return new FDBigInteger(result, offset + wordcount);
+            }
+        } else {
+            if (bitcount != 0) {
+                int anticount = 32 - bitcount;
+                if ((data[0] << bitcount) == 0) {
+                    int idx = 0;
+                    int prev = data[idx];
+                    for (; idx < nWords - 1; idx++) {
+                        int v = (prev >>> anticount);
+                        prev = data[idx + 1];
+                        v |= (prev << bitcount);
+                        data[idx] = v;
+                    }
+                    int v = prev >>> anticount;
+                    data[idx] = v;
+                    if(v==0) {
+                        nWords--;
+                    }
+                    offset++;
+                } else {
+                    int idx = nWords - 1;
+                    int prev = data[idx];
+                    int hi = prev >>> anticount;
+                    int[] result = data;
+                    int[] src = data;
+                    if (hi != 0) {
+                        if(nWords == data.length) {
+                            data = result = new int[nWords + 1];
+                        }
+                        result[nWords++] = hi;
+                    }
+                    leftShift(src,idx,result,bitcount,anticount,prev);
+                }
+            }
+            offset += wordcount;
+            return this;
+        }
+    }
+
+    /**
+     * Returns the number of <code>int</code>s this <code>FDBigInteger</code> represents.
+     *
+     * @return Number of <code>int</code>s required to represent this <code>FDBigInteger</code>.
+     */
+    /*@
+     @ requires this.value() == 0;
+     @ ensures \result == 0;
+     @
+     @  also
+     @
+     @ requires this.value() > 0;
+     @ ensures ((\bigint)1) << (\result - 1) <= this.value() && this.value() <= ((\bigint)1) << \result;
+     @*/
+    private /*@ pure @*/ int size() {
+        return nWords + offset;
+    }
+
+
+    /**
+     * Computes
+     * <pre>
+     * q = (int)( this / S )
+     * this = 10 * ( this mod S )
+     * Return q.
+     * </pre>
+     * This is the iteration step of digit development for output.
+     * We assume that S has been normalized, as above, and that
+     * "this" has been left-shifted accordingly.
+     * Also assumed, of course, is that the result, q, can be expressed
+     * as an integer, {@code 0 <= q < 10}.
+     *
+     * @param S The divisor of this <code>FDBigInteger</code>.
+     * @return <code>q = (int)(this / S)</code>.
+     */
+    /*@
+     @ requires !this.isImmutable;
+     @ requires this.size() <= S.size();
+     @ requires this.data.length + this.offset >= S.size();
+     @ requires S.value() >= ((\bigint)1) << (S.size()*32 - 4);
+     @ assignable this.nWords, this.offset, this.data, this.data[*];
+     @ ensures \result == \old(this.value() / S.value());
+     @ ensures this.value() == \old(10 * (this.value() % S.value()));
+     @*/
+    public int quoRemIteration(FDBigInteger S) throws IllegalArgumentException {
+        assert !this.isImmutable : "cannot modify immutable value";
+        // ensure that this and S have the same number of
+        // digits. If S is properly normalized and q < 10 then
+        // this must be so.
+        int thSize = this.size();
+        int sSize = S.size();
+        if (thSize < sSize) {
+            // this value is significantly less than S, result of division is zero.
+            // just mult this by 10.
+            int p = multAndCarryBy10(this.data, this.nWords, this.data);
+            if(p!=0) {
+                this.data[nWords++] = p;
+            } else {
+                trimLeadingZeros();
+            }
+            return 0;
+        } else if (thSize > sSize) {
+            throw new IllegalArgumentException("disparate values");
+        }
+        // estimate q the obvious way. We will usually be
+        // right. If not, then we're only off by a little and
+        // will re-add.
+        long q = (this.data[this.nWords - 1] & LONG_MASK) / (S.data[S.nWords - 1] & LONG_MASK);
+        long diff = multDiffMe(q, S);
+        if (diff != 0L) {
+            //@ assert q != 0;
+            //@ assert this.offset == \old(Math.min(this.offset, S.offset));
+            //@ assert this.offset <= S.offset;
+
+            // q is too big.
+            // add S back in until this turns +. This should
+            // not be very many times!
+            long sum = 0L;
+            int tStart = S.offset - this.offset;
+            //@ assert tStart >= 0;
+            int[] sd = S.data;
+            int[] td = this.data;
+            while (sum == 0L) {
+                for (int sIndex = 0, tIndex = tStart; tIndex < this.nWords; sIndex++, tIndex++) {
+                    sum += (td[tIndex] & LONG_MASK) + (sd[sIndex] & LONG_MASK);
+                    td[tIndex] = (int) sum;
+                    sum >>>= 32; // Signed or unsigned, answer is 0 or 1
+                }
+                //
+                // Originally the following line read
+                // "if ( sum !=0 && sum != -1 )"
+                // but that would be wrong, because of the
+                // treatment of the two values as entirely unsigned,
+                // it would be impossible for a carry-out to be interpreted
+                // as -1 -- it would have to be a single-bit carry-out, or +1.
+                //
+                assert sum == 0 || sum == 1 : sum; // carry out of division correction
+                q -= 1;
+            }
+        }
+        // finally, we can multiply this by 10.
+        // it cannot overflow, right, as the high-order word has
+        // at least 4 high-order zeros!
+        int p = multAndCarryBy10(this.data, this.nWords, this.data);
+        assert p == 0 : p; // Carry out of *10
+        trimLeadingZeros();
+        return (int) q;
+    }
+
+    /**
+     * Multiplies this <code>FDBigInteger</code> by 10. The operation will be
+     * performed in place unless the <code>FDBigInteger</code> is immutable in
+     * which case a new <code>FDBigInteger</code> will be returned.
+     *
+     * @return The <code>FDBigInteger</code> multiplied by 10.
+     */
+    /*@
+     @ requires this.value() == 0;
+     @ assignable \nothing;
+     @ ensures \result == this;
+     @
+     @  also
+     @
+     @ requires this.value() > 0 && this.isImmutable;
+     @ assignable \nothing;
+     @ ensures \result.value() == \old(this.value() * 10);
+     @
+     @  also
+     @
+     @ requires this.value() > 0 && !this.isImmutable;
+     @ assignable this.nWords, this.data, this.data[*];
+     @ ensures \result == this;
+     @ ensures \result.value() == \old(this.value() * 10);
+     @*/
+    public FDBigInteger multBy10() {
+        if (nWords == 0) {
+            return this;
+        }
+        if (isImmutable) {
+            int[] res = new int[nWords + 1];
+            res[nWords] = multAndCarryBy10(data, nWords, res);
+            return new FDBigInteger(res, offset);
+        } else {
+            int p = multAndCarryBy10(this.data, this.nWords, this.data);
+            if (p != 0) {
+                if (nWords == data.length) {
+                    if (data[0] == 0) {
+                        System.arraycopy(data, 1, data, 0, --nWords);
+                        offset++;
+                    } else {
+                        data = Arrays.copyOf(data, data.length + 1);
+                    }
+                }
+                data[nWords++] = p;
+            } else {
+                trimLeadingZeros();
+            }
+            return this;
+        }
+    }
+
+    /**
+     * Multiplies this <code>FDBigInteger</code> by
+     * <code>5<sup>p5</sup> * 2<sup>p2</sup></code>. The operation will be
+     * performed in place if possible, otherwise a new <code>FDBigInteger</code>
+     * will be returned.
+     *
+     * @param p5 The exponent of the power-of-five factor.
+     * @param p2 The exponent of the power-of-two factor.
+     * @return The multiplication result.
+     */
+    /*@
+     @ requires this.value() == 0 || p5 == 0 && p2 == 0;
+     @ assignable \nothing;
+     @ ensures \result == this;
+     @
+     @  also
+     @
+     @ requires this.value() > 0 && (p5 > 0 && p2 >= 0 || p5 == 0 && p2 > 0 && this.isImmutable);
+     @ assignable \nothing;
+     @ ensures \result.value() == \old(this.value() * pow52(p5, p2));
+     @
+     @  also
+     @
+     @ requires this.value() > 0 && p5 == 0 && p2 > 0 && !this.isImmutable;
+     @ assignable this.nWords, this.data, this.data[*];
+     @ ensures \result == this;
+     @ ensures \result.value() == \old(this.value() * pow52(p5, p2));
+     @*/
+    public FDBigInteger multByPow52(int p5, int p2) {
+        if (this.nWords == 0) {
+            return this;
+        }
+        FDBigInteger res = this;
+        if (p5 != 0) {
+            int[] r;
+            int extraSize = (p2 != 0) ? 1 : 0;
+            if (p5 < SMALL_5_POW.length) {
+                r = new int[this.nWords + 1 + extraSize];
+                mult(this.data, this.nWords, SMALL_5_POW[p5], r);
+                res = new FDBigInteger(r, this.offset);
+            } else {
+                FDBigInteger pow5 = big5pow(p5);
+                r = new int[this.nWords + pow5.size() + extraSize];
+                mult(this.data, this.nWords, pow5.data, pow5.nWords, r);
+                res = new FDBigInteger(r, this.offset + pow5.offset);
+            }
+        }
+        return res.leftShift(p2);
+    }
+
+    /**
+     * Multiplies two big integers represented as int arrays.
+     *
+     * @param s1 The first array factor.
+     * @param s1Len The number of elements of <code>s1</code> to use.
+     * @param s2 The second array factor.
+     * @param s2Len The number of elements of <code>s2</code> to use.
+     * @param dst The product array.
+     */
+    /*@
+     @ requires s1 != dst && s2 != dst;
+     @ requires s1.length >= s1Len && s2.length >= s2Len && dst.length >= s1Len + s2Len;
+     @ assignable dst[0 .. s1Len + s2Len - 1];
+     @ ensures AP(dst, s1Len + s2Len) == \old(AP(s1, s1Len) * AP(s2, s2Len));
+     @*/
+    private static void mult(int[] s1, int s1Len, int[] s2, int s2Len, int[] dst) {
+        for (int i = 0; i < s1Len; i++) {
+            long v = s1[i] & LONG_MASK;
+            long p = 0L;
+            for (int j = 0; j < s2Len; j++) {
+                p += (dst[i + j] & LONG_MASK) + v * (s2[j] & LONG_MASK);
+                dst[i + j] = (int) p;
+                p >>>= 32;
+            }
+            dst[i + s2Len] = (int) p;
+        }
+    }
+
+    /**
+     * Subtracts the supplied <code>FDBigInteger</code> subtrahend from this
+     * <code>FDBigInteger</code>. Assert that the result is positive.
+     * If the subtrahend is immutable, store the result in this(minuend).
+     * If this(minuend) is immutable a new <code>FDBigInteger</code> is created.
+     *
+     * @param subtrahend The <code>FDBigInteger</code> to be subtracted.
+     * @return This <code>FDBigInteger</code> less the subtrahend.
+     */
+    /*@
+     @ requires this.isImmutable;
+     @ requires this.value() >= subtrahend.value();
+     @ assignable \nothing;
+     @ ensures \result.value() == \old(this.value() - subtrahend.value());
+     @
+     @  also
+     @
+     @ requires !subtrahend.isImmutable;
+     @ requires this.value() >= subtrahend.value();
+     @ assignable this.nWords, this.offset, this.data, this.data[*];
+     @ ensures \result == this;
+     @ ensures \result.value() == \old(this.value() - subtrahend.value());
+     @*/
+    public FDBigInteger leftInplaceSub(FDBigInteger subtrahend) {
+        assert this.size() >= subtrahend.size() : "result should be positive";
+        FDBigInteger minuend;
+        if (this.isImmutable) {
+            minuend = new FDBigInteger(this.data.clone(), this.offset);
+        } else {
+            minuend = this;
+        }
+        int offsetDiff = subtrahend.offset - minuend.offset;
+        int[] sData = subtrahend.data;
+        int[] mData = minuend.data;
+        int subLen = subtrahend.nWords;
+        int minLen = minuend.nWords;
+        if (offsetDiff < 0) {
+            // need to expand minuend
+            int rLen = minLen - offsetDiff;
+            if (rLen < mData.length) {
+                System.arraycopy(mData, 0, mData, -offsetDiff, minLen);
+                Arrays.fill(mData, 0, -offsetDiff, 0);
+            } else {
+                int[] r = new int[rLen];
+                System.arraycopy(mData, 0, r, -offsetDiff, minLen);
+                minuend.data = mData = r;
+            }
+            minuend.offset = subtrahend.offset;
+            minuend.nWords = minLen = rLen;
+            offsetDiff = 0;
+        }
+        long borrow = 0L;
+        int mIndex = offsetDiff;
+        for (int sIndex = 0; sIndex < subLen && mIndex < minLen; sIndex++, mIndex++) {
+            long diff = (mData[mIndex] & LONG_MASK) - (sData[sIndex] & LONG_MASK) + borrow;
+            mData[mIndex] = (int) diff;
+            borrow = diff >> 32; // signed shift
+        }
+        for (; borrow != 0 && mIndex < minLen; mIndex++) {
+            long diff = (mData[mIndex] & LONG_MASK) + borrow;
+            mData[mIndex] = (int) diff;
+            borrow = diff >> 32; // signed shift
+        }
+        assert borrow == 0L : borrow; // borrow out of subtract,
+        // result should be positive
+        minuend.trimLeadingZeros();
+        return minuend;
+    }
+
+    /**
+     * Subtracts the supplied <code>FDBigInteger</code> subtrahend from this
+     * <code>FDBigInteger</code>. Assert that the result is positive.
+     * If the this(minuend) is immutable, store the result in subtrahend.
+     * If subtrahend is immutable a new <code>FDBigInteger</code> is created.
+     *
+     * @param subtrahend The <code>FDBigInteger</code> to be subtracted.
+     * @return This <code>FDBigInteger</code> less the subtrahend.
+     */
+    /*@
+     @ requires subtrahend.isImmutable;
+     @ requires this.value() >= subtrahend.value();
+     @ assignable \nothing;
+     @ ensures \result.value() == \old(this.value() - subtrahend.value());
+     @
+     @  also
+     @
+     @ requires !subtrahend.isImmutable;
+     @ requires this.value() >= subtrahend.value();
+     @ assignable subtrahend.nWords, subtrahend.offset, subtrahend.data, subtrahend.data[*];
+     @ ensures \result == subtrahend;
+     @ ensures \result.value() == \old(this.value() - subtrahend.value());
+     @*/
+    public FDBigInteger rightInplaceSub(FDBigInteger subtrahend) {
+        assert this.size() >= subtrahend.size() : "result should be positive";
+        FDBigInteger minuend = this;
+        if (subtrahend.isImmutable) {
+            subtrahend = new FDBigInteger(subtrahend.data.clone(), subtrahend.offset);
+        }
+        int offsetDiff = minuend.offset - subtrahend.offset;
+        int[] sData = subtrahend.data;
+        int[] mData = minuend.data;
+        int subLen = subtrahend.nWords;
+        int minLen = minuend.nWords;
+        if (offsetDiff < 0) {
+            int rLen = minLen;
+            if (rLen < sData.length) {
+                System.arraycopy(sData, 0, sData, -offsetDiff, subLen);
+                Arrays.fill(sData, 0, -offsetDiff, 0);
+            } else {
+                int[] r = new int[rLen];
+                System.arraycopy(sData, 0, r, -offsetDiff, subLen);
+                subtrahend.data = sData = r;
+            }
+            subtrahend.offset = minuend.offset;
+            subLen -= offsetDiff;
+            offsetDiff = 0;
+        } else {
+            int rLen = minLen + offsetDiff;
+            if (rLen >= sData.length) {
+                subtrahend.data = sData = Arrays.copyOf(sData, rLen);
+            }
+        }
+        //@ assert minuend == this && minuend.value() == \old(this.value());
+        //@ assert mData == minuend.data && minLen == minuend.nWords;
+        //@ assert subtrahend.offset + subtrahend.data.length >= minuend.size();
+        //@ assert sData == subtrahend.data;
+        //@ assert AP(subtrahend.data, subtrahend.data.length) << subtrahend.offset == \old(subtrahend.value());
+        //@ assert subtrahend.offset == Math.min(\old(this.offset), minuend.offset);
+        //@ assert offsetDiff == minuend.offset - subtrahend.offset;
+        //@ assert 0 <= offsetDiff && offsetDiff + minLen <= sData.length;
+        int sIndex = 0;
+        long borrow = 0L;
+        for (; sIndex < offsetDiff; sIndex++) {
+            long diff = 0L - (sData[sIndex] & LONG_MASK) + borrow;
+            sData[sIndex] = (int) diff;
+            borrow = diff >> 32; // signed shift
+        }
+        //@ assert sIndex == offsetDiff;
+        for (int mIndex = 0; mIndex < minLen; sIndex++, mIndex++) {
+            //@ assert sIndex == offsetDiff + mIndex;
+            long diff = (mData[mIndex] & LONG_MASK) - (sData[sIndex] & LONG_MASK) + borrow;
+            sData[sIndex] = (int) diff;
+            borrow = diff >> 32; // signed shift
+        }
+        assert borrow == 0L : borrow; // borrow out of subtract,
+        // result should be positive
+        subtrahend.nWords = sIndex;
+        subtrahend.trimLeadingZeros();
+        return subtrahend;
+
+    }
+
+    /**
+     * Determines whether all elements of an array are zero for all indices less
+     * than a given index.
+     *
+     * @param a The array to be examined.
+     * @param from The index strictly below which elements are to be examined.
+     * @return Zero if all elements in range are zero, 1 otherwise.
+     */
+    /*@
+     @ requires 0 <= from && from <= a.length;
+     @ ensures \result == (AP(a, from) == 0 ? 0 : 1);
+     @*/
+    private /*@ pure @*/ static int checkZeroTail(int[] a, int from) {
+        while (from > 0) {
+            if (a[--from] != 0) {
+                return 1;
+            }
+        }
+        return 0;
+    }
+
+    /**
+     * Compares the parameter with this <code>FDBigInteger</code>. Returns an
+     * integer accordingly as:
+     * <pre>{@code
+     * > 0: this > other
+     *   0: this == other
+     * < 0: this < other
+     * }</pre>
+     *
+     * @param other The <code>FDBigInteger</code> to compare.
+     * @return A negative value, zero, or a positive value according to the
+     * result of the comparison.
+     */
+    /*@
+     @ ensures \result == (this.value() < other.value() ? -1 : this.value() > other.value() ? +1 : 0);
+     @*/
+    public /*@ pure @*/ int cmp(FDBigInteger other) {
+        int aSize = nWords + offset;
+        int bSize = other.nWords + other.offset;
+        if (aSize > bSize) {
+            return 1;
+        } else if (aSize < bSize) {
+            return -1;
+        }
+        int aLen = nWords;
+        int bLen = other.nWords;
+        while (aLen > 0 && bLen > 0) {
+            int a = data[--aLen];
+            int b = other.data[--bLen];
+            if (a != b) {
+                return ((a & LONG_MASK) < (b & LONG_MASK)) ? -1 : 1;
+            }
+        }
+        if (aLen > 0) {
+            return checkZeroTail(data, aLen);
+        }
+        if (bLen > 0) {
+            return -checkZeroTail(other.data, bLen);
+        }
+        return 0;
+    }
+
+    /**
+     * Compares this <code>FDBigInteger</code> with
+     * <code>5<sup>p5</sup> * 2<sup>p2</sup></code>.
+     * Returns an integer accordingly as:
+     * <pre>{@code
+     * > 0: this > other
+     *   0: this == other
+     * < 0: this < other
+     * }</pre>
+     * @param p5 The exponent of the power-of-five factor.
+     * @param p2 The exponent of the power-of-two factor.
+     * @return A negative value, zero, or a positive value according to the
+     * result of the comparison.
+     */
+    /*@
+     @ requires p5 >= 0 && p2 >= 0;
+     @ ensures \result == (this.value() < pow52(p5, p2) ? -1 : this.value() >  pow52(p5, p2) ? +1 : 0);
+     @*/
+    public /*@ pure @*/ int cmpPow52(int p5, int p2) {
+        if (p5 == 0) {
+            int wordcount = p2 >> 5;
+            int bitcount = p2 & 0x1f;
+            int size = this.nWords + this.offset;
+            if (size > wordcount + 1) {
+                return 1;
+            } else if (size < wordcount + 1) {
+                return -1;
+            }
+            int a = this.data[this.nWords -1];
+            int b = 1 << bitcount;
+            if (a != b) {
+                return ( (a & LONG_MASK) < (b & LONG_MASK)) ? -1 : 1;
+            }
+            return checkZeroTail(this.data, this.nWords - 1);
+        }
+        return this.cmp(big5pow(p5).leftShift(p2));
+    }
+
+    /**
+     * Compares this <code>FDBigInteger</code> with <code>x + y</code>. Returns a
+     * value according to the comparison as:
+     * <pre>{@code
+     * -1: this <  x + y
+     *  0: this == x + y
+     *  1: this >  x + y
+     * }</pre>
+     * @param x The first addend of the sum to compare.
+     * @param y The second addend of the sum to compare.
+     * @return -1, 0, or 1 according to the result of the comparison.
+     */
+    /*@
+     @ ensures \result == (this.value() < x.value() + y.value() ? -1 : this.value() > x.value() + y.value() ? +1 : 0);
+     @*/
+    public /*@ pure @*/ int addAndCmp(FDBigInteger x, FDBigInteger y) {
+        FDBigInteger big;
+        FDBigInteger small;
+        int xSize = x.size();
+        int ySize = y.size();
+        int bSize;
+        int sSize;
+        if (xSize >= ySize) {
+            big = x;
+            small = y;
+            bSize = xSize;
+            sSize = ySize;
+        } else {
+            big = y;
+            small = x;
+            bSize = ySize;
+            sSize = xSize;
+        }
+        int thSize = this.size();
+        if (bSize == 0) {
+            return thSize == 0 ? 0 : 1;
+        }
+        if (sSize == 0) {
+            return this.cmp(big);
+        }
+        if (bSize > thSize) {
+            return -1;
+        }
+        if (bSize + 1 < thSize) {
+            return 1;
+        }
+        long top = (big.data[big.nWords - 1] & LONG_MASK);
+        if (sSize == bSize) {
+            top += (small.data[small.nWords - 1] & LONG_MASK);
+        }
+        if ((top >>> 32) == 0) {
+            if (((top + 1) >>> 32) == 0) {
+                // good case - no carry extension
+                if (bSize < thSize) {
+                    return 1;
+                }
+                // here sum.nWords == this.nWords
+                long v = (this.data[this.nWords - 1] & LONG_MASK);
+                if (v < top) {
+                    return -1;
+                }
+                if (v > top + 1) {
+                    return 1;
+                }
+            }
+        } else { // (top>>>32)!=0 guaranteed carry extension
+            if (bSize + 1 > thSize) {
+                return -1;
+            }
+            // here sum.nWords == this.nWords
+            top >>>= 32;
+            long v = (this.data[this.nWords - 1] & LONG_MASK);
+            if (v < top) {
+                return -1;
+            }
+            if (v > top + 1) {
+                return 1;
+            }
+        }
+        return this.cmp(big.add(small));
+    }
+
+    /**
+     * Makes this <code>FDBigInteger</code> immutable.
+     */
+    /*@
+     @ assignable this.isImmutable;
+     @ ensures this.isImmutable;
+     @*/
+    public void makeImmutable() {
+        this.isImmutable = true;
+    }
+
+    /**
+     * Multiplies this <code>FDBigInteger</code> by an integer.
+     *
+     * @param i The factor by which to multiply this <code>FDBigInteger</code>.
+     * @return This <code>FDBigInteger</code> multiplied by an integer.
+     */
+    /*@
+     @ requires this.value() == 0;
+     @ assignable \nothing;
+     @ ensures \result == this;
+     @
+     @  also
+     @
+     @ requires this.value() != 0;
+     @ assignable \nothing;
+     @ ensures \result.value() == \old(this.value() * UNSIGNED(i));
+     @*/
+    private FDBigInteger mult(int i) {
+        if (this.nWords == 0) {
+            return this;
+        }
+        int[] r = new int[nWords + 1];
+        mult(data, nWords, i, r);
+        return new FDBigInteger(r, offset);
+    }
+
+    /**
+     * Multiplies this <code>FDBigInteger</code> by another <code>FDBigInteger</code>.
+     *
+     * @param other The <code>FDBigInteger</code> factor by which to multiply.
+     * @return The product of this and the parameter <code>FDBigInteger</code>s.
+     */
+    /*@
+     @ requires this.value() == 0;
+     @ assignable \nothing;
+     @ ensures \result == this;
+     @
+     @  also
+     @
+     @ requires this.value() != 0 && other.value() == 0;
+     @ assignable \nothing;
+     @ ensures \result == other;
+     @
+     @  also
+     @
+     @ requires this.value() != 0 && other.value() != 0;
+     @ assignable \nothing;
+     @ ensures \result.value() == \old(this.value() * other.value());
+     @*/
+    private FDBigInteger mult(FDBigInteger other) {
+        if (this.nWords == 0) {
+            return this;
+        }
+        if (this.size() == 1) {
+            return other.mult(data[0]);
+        }
+        if (other.nWords == 0) {
+            return other;
+        }
+        if (other.size() == 1) {
+            return this.mult(other.data[0]);
+        }
+        int[] r = new int[nWords + other.nWords];
+        mult(this.data, this.nWords, other.data, other.nWords, r);
+        return new FDBigInteger(r, this.offset + other.offset);
+    }
+
+    /**
+     * Adds another <code>FDBigInteger</code> to this <code>FDBigInteger</code>.
+     *
+     * @param other The <code>FDBigInteger</code> to add.
+     * @return The sum of the <code>FDBigInteger</code>s.
+     */
+    /*@
+     @ assignable \nothing;
+     @ ensures \result.value() == \old(this.value() + other.value());
+     @*/
+    private FDBigInteger add(FDBigInteger other) {
+        FDBigInteger big, small;
+        int bigLen, smallLen;
+        int tSize = this.size();
+        int oSize = other.size();
+        if (tSize >= oSize) {
+            big = this;
+            bigLen = tSize;
+            small = other;
+            smallLen = oSize;
+        } else {
+            big = other;
+            bigLen = oSize;
+            small = this;
+            smallLen = tSize;
+        }
+        int[] r = new int[bigLen + 1];
+        int i = 0;
+        long carry = 0L;
+        for (; i < smallLen; i++) {
+            carry += (i < big.offset   ? 0L : (big.data[i - big.offset] & LONG_MASK) )
+                   + ((i < small.offset ? 0L : (small.data[i - small.offset] & LONG_MASK)));
+            r[i] = (int) carry;
+            carry >>= 32; // signed shift.
+        }
+        for (; i < bigLen; i++) {
+            carry += (i < big.offset ? 0L : (big.data[i - big.offset] & LONG_MASK) );
+            r[i] = (int) carry;
+            carry >>= 32; // signed shift.
+        }
+        r[bigLen] = (int) carry;
+        return new FDBigInteger(r, 0);
+    }
+
+
+    /**
+     * Multiplies a <code>FDBigInteger</code> by an int and adds another int. The
+     * result is computed in place. This method is intended only to be invoked
+     * from
+     * <code>
+     * FDBigInteger(long lValue, char[] digits, int kDigits, int nDigits)
+     * </code>.
+     *
+     * @param iv The factor by which to multiply this <code>FDBigInteger</code>.
+     * @param addend The value to add to the product of this
+     * <code>FDBigInteger</code> and <code>iv</code>.
+     */
+    /*@
+     @ requires this.value()*UNSIGNED(iv) + UNSIGNED(addend) < ((\bigint)1) << ((this.data.length + this.offset)*32);
+     @ assignable this.data[*];
+     @ ensures this.value() == \old(this.value()*UNSIGNED(iv) + UNSIGNED(addend));
+     @*/
+    private /*@ helper @*/ void multAddMe(int iv, int addend) {
+        long v = iv & LONG_MASK;
+        // unroll 0th iteration, doing addition.
+        long p = v * (data[0] & LONG_MASK) + (addend & LONG_MASK);
+        data[0] = (int) p;
+        p >>>= 32;
+        for (int i = 1; i < nWords; i++) {
+            p += v * (data[i] & LONG_MASK);
+            data[i] = (int) p;
+            p >>>= 32;
+        }
+        if (p != 0L) {
+            data[nWords++] = (int) p; // will fail noisily if illegal!
+        }
+    }
+
+    //
+    // original doc:
+    //
+    // do this -=q*S
+    // returns borrow
+    //
+    /**
+     * Multiplies the parameters and subtracts them from this
+     * <code>FDBigInteger</code>.
+     *
+     * @param q The integer parameter.
+     * @param S The <code>FDBigInteger</code> parameter.
+     * @return <code>this - q*S</code>.
+     */
+    /*@
+     @ ensures nWords == 0 ==> offset == 0;
+     @ ensures nWords > 0 ==> data[nWords - 1] != 0;
+     @*/
+    /*@
+     @ requires 0 < q && q <= (1L << 31);
+     @ requires data != null;
+     @ requires 0 <= nWords && nWords <= data.length && offset >= 0;
+     @ requires !this.isImmutable;
+     @ requires this.size() == S.size();
+     @ requires this != S;
+     @ assignable this.nWords, this.offset, this.data, this.data[*];
+     @ ensures -q <= \result && \result <= 0;
+     @ ensures this.size() == \old(this.size());
+     @ ensures this.value() + (\result << (this.size()*32)) == \old(this.value() - q*S.value());
+     @ ensures this.offset == \old(Math.min(this.offset, S.offset));
+     @ ensures \old(this.offset <= S.offset) ==> this.nWords == \old(this.nWords);
+     @ ensures \old(this.offset <= S.offset) ==> this.offset == \old(this.offset);
+     @ ensures \old(this.offset <= S.offset) ==> this.data == \old(this.data);
+     @
+     @  also
+     @
+     @ requires q == 0;
+     @ assignable \nothing;
+     @ ensures \result == 0;
+     @*/
+    private /*@ helper @*/ long multDiffMe(long q, FDBigInteger S) {
+        long diff = 0L;
+        if (q != 0) {
+            int deltaSize = S.offset - this.offset;
+            if (deltaSize >= 0) {
+                int[] sd = S.data;
+                int[] td = this.data;
+                for (int sIndex = 0, tIndex = deltaSize; sIndex < S.nWords; sIndex++, tIndex++) {
+                    diff += (td[tIndex] & LONG_MASK) - q * (sd[sIndex] & LONG_MASK);
+                    td[tIndex] = (int) diff;
+                    diff >>= 32; // N.B. SIGNED shift.
+                }
+            } else {
+                deltaSize = -deltaSize;
+                int[] rd = new int[nWords + deltaSize];
+                int sIndex = 0;
+                int rIndex = 0;
+                int[] sd = S.data;
+                for (; rIndex < deltaSize && sIndex < S.nWords; sIndex++, rIndex++) {
+                    diff -= q * (sd[sIndex] & LONG_MASK);
+                    rd[rIndex] = (int) diff;
+                    diff >>= 32; // N.B. SIGNED shift.
+                }
+                int tIndex = 0;
+                int[] td = this.data;
+                for (; sIndex < S.nWords; sIndex++, tIndex++, rIndex++) {
+                    diff += (td[tIndex] & LONG_MASK) - q * (sd[sIndex] & LONG_MASK);
+                    rd[rIndex] = (int) diff;
+                    diff >>= 32; // N.B. SIGNED shift.
+                }
+                this.nWords += deltaSize;
+                this.offset -= deltaSize;
+                this.data = rd;
+            }
+        }
+        return diff;
+    }
+
+
+    /**
+     * Multiplies by 10 a big integer represented as an array. The final carry
+     * is returned.
+     *
+     * @param src The array representation of the big integer.
+     * @param srcLen The number of elements of <code>src</code> to use.
+     * @param dst The product array.
+     * @return The final carry of the multiplication.
+     */
+    /*@
+     @ requires src.length >= srcLen && dst.length >= srcLen;
+     @ assignable dst[0 .. srcLen - 1];
+     @ ensures 0 <= \result && \result < 10;
+     @ ensures AP(dst, srcLen) + (\result << (srcLen*32)) == \old(AP(src, srcLen) * 10);
+     @*/
+    private static int multAndCarryBy10(int[] src, int srcLen, int[] dst) {
+        long carry = 0;
+        for (int i = 0; i < srcLen; i++) {
+            long product = (src[i] & LONG_MASK) * 10L + carry;
+            dst[i] = (int) product;
+            carry = product >>> 32;
+        }
+        return (int) carry;
+    }
+
+    /**
+     * Multiplies by a constant value a big integer represented as an array.
+     * The constant factor is an <code>int</code>.
+     *
+     * @param src The array representation of the big integer.
+     * @param srcLen The number of elements of <code>src</code> to use.
+     * @param value The constant factor by which to multiply.
+     * @param dst The product array.
+     */
+    /*@
+     @ requires src.length >= srcLen && dst.length >= srcLen + 1;
+     @ assignable dst[0 .. srcLen];
+     @ ensures AP(dst, srcLen + 1) == \old(AP(src, srcLen) * UNSIGNED(value));
+     @*/
+    private static void mult(int[] src, int srcLen, int value, int[] dst) {
+        long val = value & LONG_MASK;
+        long carry = 0;
+        for (int i = 0; i < srcLen; i++) {
+            long product = (src[i] & LONG_MASK) * val + carry;
+            dst[i] = (int) product;
+            carry = product >>> 32;
+        }
+        dst[srcLen] = (int) carry;
+    }
+
+    /**
+     * Multiplies by a constant value a big integer represented as an array.
+     * The constant factor is a long represent as two <code>int</code>s.
+     *
+     * @param src The array representation of the big integer.
+     * @param srcLen The number of elements of <code>src</code> to use.
+     * @param v0 The lower 32 bits of the long factor.
+     * @param v1 The upper 32 bits of the long factor.
+     * @param dst The product array.
+     */
+    /*@
+     @ requires src != dst;
+     @ requires src.length >= srcLen && dst.length >= srcLen + 2;
+     @ assignable dst[0 .. srcLen + 1];
+     @ ensures AP(dst, srcLen + 2) == \old(AP(src, srcLen) * (UNSIGNED(v0) + (UNSIGNED(v1) << 32)));
+     @*/
+    private static void mult(int[] src, int srcLen, int v0, int v1, int[] dst) {
+        long v = v0 & LONG_MASK;
+        long carry = 0;
+        for (int j = 0; j < srcLen; j++) {
+            long product = v * (src[j] & LONG_MASK) + carry;
+            dst[j] = (int) product;
+            carry = product >>> 32;
+        }
+        dst[srcLen] = (int) carry;
+        v = v1 & LONG_MASK;
+        carry = 0;
+        for (int j = 0; j < srcLen; j++) {
+            long product = (dst[j + 1] & LONG_MASK) + v * (src[j] & LONG_MASK) + carry;
+            dst[j + 1] = (int) product;
+            carry = product >>> 32;
+        }
+        dst[srcLen + 1] = (int) carry;
+    }
+
+    // Fails assertion for negative exponent.
+    /**
+     * Computes <code>5</code> raised to a given power.
+     *
+     * @param p The exponent of 5.
+     * @return <code>5<sup>p</sup></code>.
+     */
+    private static FDBigInteger big5pow(int p) {
+        assert p >= 0 : p; // negative power of 5
+        if (p < MAX_FIVE_POW) {
+            return POW_5_CACHE[p];
+        }
+        return big5powRec(p);
+    }
+
+    // slow path
+    /**
+     * Computes <code>5</code> raised to a given power.
+     *
+     * @param p The exponent of 5.
+     * @return <code>5<sup>p</sup></code>.
+     */
+    private static FDBigInteger big5powRec(int p) {
+        if (p < MAX_FIVE_POW) {
+            return POW_5_CACHE[p];
+        }
+        // construct the value.
+        // recursively.
+        int q, r;
+        // in order to compute 5^p,
+        // compute its square root, 5^(p/2) and square.
+        // or, let q = p / 2, r = p -q, then
+        // 5^p = 5^(q+r) = 5^q * 5^r
+        q = p >> 1;
+        r = p - q;
+        FDBigInteger bigq = big5powRec(q);
+        if (r < SMALL_5_POW.length) {
+            return bigq.mult(SMALL_5_POW[r]);
+        } else {
+            return bigq.mult(big5powRec(r));
+        }
+    }
+
+    // for debugging ...
+    /**
+     * Converts this <code>FDBigInteger</code> to a hexadecimal string.
+     *
+     * @return The hexadecimal string representation.
+     */
+    public String toHexString(){
+        if(nWords ==0) {
+            return "0";
+        }
+        StringBuilder sb = new StringBuilder((nWords +offset)*8);
+        for(int i= nWords -1; i>=0; i--) {
+            String subStr = Integer.toHexString(data[i]);
+            for(int j = subStr.length(); j<8; j++) {
+                sb.append('0');
+            }
+            sb.append(subStr);
+        }
+        for(int i=offset; i>0; i--) {
+            sb.append("00000000");
+        }
+        return sb.toString();
+    }
+
+    // for debugging ...
+    /**
+     * Converts this <code>FDBigInteger</code> to a <code>BigInteger</code>.
+     *
+     * @return The <code>BigInteger</code> representation.
+     */
+    public BigInteger toBigInteger() {
+        byte[] magnitude = new byte[nWords * 4 + 1];
+        for (int i = 0; i < nWords; i++) {
+            int w = data[i];
+            magnitude[magnitude.length - 4 * i - 1] = (byte) w;
+            magnitude[magnitude.length - 4 * i - 2] = (byte) (w >> 8);
+            magnitude[magnitude.length - 4 * i - 3] = (byte) (w >> 16);
+            magnitude[magnitude.length - 4 * i - 4] = (byte) (w >> 24);
+        }
+        return new BigInteger(magnitude).shiftLeft(offset * 32);
+    }
+
+    // for debugging ...
+    /**
+     * Converts this <code>FDBigInteger</code> to a string.
+     *
+     * @return The string representation.
+     */
+    @Override
+    public String toString(){
+        return toBigInteger().toString();
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/math/FloatConsts.class b/tests/test_data/std/jdk/internal/math/FloatConsts.class
new file mode 100644
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/math/FloatConsts.java b/tests/test_data/std/jdk/internal/math/FloatConsts.java
new file mode 100644
index 00000000..fd304c78
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/math/FloatConsts.java
@@ -0,0 +1,95 @@
+/*
+ * Copyright (c) 2003, 2022, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package jdk.internal.math;
+
+import static java.lang.Float.MIN_EXPONENT;
+import static java.lang.Float.PRECISION;
+import static java.lang.Float.SIZE;
+
+/**
+ * This class contains additional constants documenting limits of the
+ * {@code float} type.
+ *
+ * @author Joseph D. Darcy
+ */
+
+public class FloatConsts {
+    /**
+     * Don't let anyone instantiate this class.
+     */
+    private FloatConsts() {}
+
+    /**
+     * The number of logical bits in the significand of a
+     * {@code float} number, including the implicit bit.
+     */
+    public static final int SIGNIFICAND_WIDTH = PRECISION;
+
+    /**
+     * The exponent the smallest positive {@code float}
+     * subnormal value would have if it could be normalized.
+     */
+    public static final int MIN_SUB_EXPONENT =
+            MIN_EXPONENT - (SIGNIFICAND_WIDTH - 1); // -149
+
+    /**
+     * Bias used in representing a {@code float} exponent.
+     */
+    public static final int EXP_BIAS =
+            (1 << (SIZE - SIGNIFICAND_WIDTH - 1)) - 1; // 127
+
+    /**
+     * Bit mask to isolate the sign bit of a {@code float}.
+     */
+    public static final int SIGN_BIT_MASK = 1 << (SIZE - 1);
+
+    /**
+     * Bit mask to isolate the exponent field of a {@code float}.
+     */
+    public static final int EXP_BIT_MASK =
+            ((1 << (SIZE - SIGNIFICAND_WIDTH)) - 1) << (SIGNIFICAND_WIDTH - 1);
+
+    /**
+     * Bit mask to isolate the significand field of a {@code float}.
+     */
+    public static final int SIGNIF_BIT_MASK = (1 << (SIGNIFICAND_WIDTH - 1)) - 1;
+
+    /**
+     * Bit mask to isolate the magnitude bits (combined exponent and
+     * significand fields) of a {@code float}.
+     */
+    public static final int MAG_BIT_MASK = EXP_BIT_MASK | SIGNIF_BIT_MASK;
+
+    static {
+        // verify bit masks cover all bit positions and that the bit
+        // masks are non-overlapping
+        assert(((SIGN_BIT_MASK | EXP_BIT_MASK | SIGNIF_BIT_MASK) == ~0) &&
+               (((SIGN_BIT_MASK & EXP_BIT_MASK) == 0) &&
+                ((SIGN_BIT_MASK & SIGNIF_BIT_MASK) == 0) &&
+                ((EXP_BIT_MASK & SIGNIF_BIT_MASK) == 0)) &&
+                ((SIGN_BIT_MASK | MAG_BIT_MASK) == ~0));
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/math/FloatToDecimal.class b/tests/test_data/std/jdk/internal/math/FloatToDecimal.class
new file mode 100644
index 0000000000000000000000000000000000000000..d5ecea16513a59eb3c7f5877be07535a5628cfa0
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diff --git a/tests/test_data/std/jdk/internal/math/FloatToDecimal.java b/tests/test_data/std/jdk/internal/math/FloatToDecimal.java
new file mode 100644
index 00000000..56382767
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/math/FloatToDecimal.java
@@ -0,0 +1,502 @@
+/*
+ * Copyright (c) 2021, 2022, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package jdk.internal.math;
+
+import java.io.IOException;
+
+import static java.lang.Float.*;
+import static java.lang.Integer.*;
+import static java.lang.Math.multiplyHigh;
+import static jdk.internal.math.MathUtils.*;
+
+/**
+ * This class exposes a method to render a {@code float} as a string.
+ */
+public final class FloatToDecimal {
+    /*
+     * For full details about this code see the following references:
+     *
+     * [1] Giulietti, "The Schubfach way to render doubles",
+     *     https://drive.google.com/file/d/1gp5xv4CAa78SVgCeWfGqqI4FfYYYuNFb
+     *
+     * [2] IEEE Computer Society, "IEEE Standard for Floating-Point Arithmetic"
+     *
+     * [3] Bouvier & Zimmermann, "Division-Free Binary-to-Decimal Conversion"
+     *
+     * Divisions are avoided altogether for the benefit of those architectures
+     * that do not provide specific machine instructions or where they are slow.
+     * This is discussed in section 10 of [1].
+     */
+
+    /* The precision in bits */
+    static final int P = PRECISION;
+
+    /* Exponent width in bits */
+    private static final int W = (Float.SIZE - 1) - (P - 1);
+
+    /* Minimum value of the exponent: -(2^(W-1)) - P + 3 */
+    static final int Q_MIN = (-1 << (W - 1)) - P + 3;
+
+    /* Maximum value of the exponent: 2^(W-1) - P */
+    static final int Q_MAX = (1 << (W - 1)) - P;
+
+    /* 10^(E_MIN - 1) <= MIN_VALUE < 10^E_MIN */
+    static final int E_MIN = -44;
+
+    /* 10^(E_MAX - 1) <= MAX_VALUE < 10^E_MAX */
+    static final int E_MAX = 39;
+
+    /* Threshold to detect tiny values, as in section 8.2.1 of [1] */
+    static final int C_TINY = 8;
+
+    /* The minimum and maximum k, as in section 8 of [1] */
+    static final int K_MIN = -45;
+    static final int K_MAX = 31;
+
+    /* H is as in section 8.1 of [1] */
+    static final int H = 9;
+
+    /* Minimum value of the significand of a normal value: 2^(P-1) */
+    private static final int C_MIN = 1 << (P - 1);
+
+    /* Mask to extract the biased exponent */
+    private static final int BQ_MASK = (1 << W) - 1;
+
+    /* Mask to extract the fraction bits */
+    private static final int T_MASK = (1 << (P - 1)) - 1;
+
+    /* Used in rop() */
+    private static final long MASK_32 = (1L << 32) - 1;
+
+    /* Used for left-to-tight digit extraction */
+    private static final int MASK_28 = (1 << 28) - 1;
+
+    private static final int NON_SPECIAL    = 0;
+    private static final int PLUS_ZERO      = 1;
+    private static final int MINUS_ZERO     = 2;
+    private static final int PLUS_INF       = 3;
+    private static final int MINUS_INF      = 4;
+    private static final int NAN            = 5;
+
+    /*
+     * Room for the longer of the forms
+     *     -ddddd.dddd         H + 2 characters
+     *     -0.00ddddddddd      H + 5 characters
+     *     -d.ddddddddE-ee     H + 6 characters
+     * where there are H digits d
+     */
+    public static final int MAX_CHARS = H + 6;
+
+    private final byte[] bytes = new byte[MAX_CHARS];
+
+    /* Index into bytes of rightmost valid character */
+    private int index;
+
+    private FloatToDecimal() {
+    }
+
+    /**
+     * Returns a string representation of the {@code float}
+     * argument. All characters mentioned below are ASCII characters.
+     *
+     * @param   v   the {@code float} to be converted.
+     * @return a string representation of the argument.
+     * @see Float#toString(float)
+     */
+    public static String toString(float v) {
+        return new FloatToDecimal().toDecimalString(v);
+    }
+
+    /**
+     * Appends the rendering of the {@code v} to {@code app}.
+     *
+     * <p>The outcome is the same as if {@code v} were first
+     * {@link #toString(float) rendered} and the resulting string were then
+     * {@link Appendable#append(CharSequence) appended} to {@code app}.
+     *
+     * @param v the {@code float} whose rendering is appended.
+     * @param app the {@link Appendable} to append to.
+     * @throws IOException If an I/O error occurs
+     */
+    public static Appendable appendTo(float v, Appendable app)
+            throws IOException {
+        return new FloatToDecimal().appendDecimalTo(v, app);
+    }
+
+    private String toDecimalString(float v) {
+        return switch (toDecimal(v)) {
+            case NON_SPECIAL -> charsToString();
+            case PLUS_ZERO -> "0.0";
+            case MINUS_ZERO -> "-0.0";
+            case PLUS_INF -> "Infinity";
+            case MINUS_INF -> "-Infinity";
+            default -> "NaN";
+        };
+    }
+
+    private Appendable appendDecimalTo(float v, Appendable app)
+            throws IOException {
+        switch (toDecimal(v)) {
+            case NON_SPECIAL:
+                char[] chars = new char[index + 1];
+                for (int i = 0; i < chars.length; ++i) {
+                    chars[i] = (char) bytes[i];
+                }
+                if (app instanceof StringBuilder builder) {
+                    return builder.append(chars);
+                }
+                if (app instanceof StringBuffer buffer) {
+                    return buffer.append(chars);
+                }
+                for (char c : chars) {
+                    app.append(c);
+                }
+                return app;
+            case PLUS_ZERO: return app.append("0.0");
+            case MINUS_ZERO: return app.append("-0.0");
+            case PLUS_INF: return app.append("Infinity");
+            case MINUS_INF: return app.append("-Infinity");
+            default: return app.append("NaN");
+        }
+    }
+
+    /*
+     * Returns
+     *     PLUS_ZERO       iff v is 0.0
+     *     MINUS_ZERO      iff v is -0.0
+     *     PLUS_INF        iff v is POSITIVE_INFINITY
+     *     MINUS_INF       iff v is NEGATIVE_INFINITY
+     *     NAN             iff v is NaN
+     */
+    private int toDecimal(float v) {
+        /*
+         * For full details see references [2] and [1].
+         *
+         * For finite v != 0, determine integers c and q such that
+         *     |v| = c 2^q    and
+         *     Q_MIN <= q <= Q_MAX    and
+         *         either    2^(P-1) <= c < 2^P                 (normal)
+         *         or        0 < c < 2^(P-1)  and  q = Q_MIN    (subnormal)
+         */
+        int bits = floatToRawIntBits(v);
+        int t = bits & T_MASK;
+        int bq = (bits >>> P - 1) & BQ_MASK;
+        if (bq < BQ_MASK) {
+            index = -1;
+            if (bits < 0) {
+                append('-');
+            }
+            if (bq != 0) {
+                /* normal value. Here mq = -q */
+                int mq = -Q_MIN + 1 - bq;
+                int c = C_MIN | t;
+                /* The fast path discussed in section 8.3 of [1] */
+                if (0 < mq & mq < P) {
+                    int f = c >> mq;
+                    if (f << mq == c) {
+                        return toChars(f, 0);
+                    }
+                }
+                return toDecimal(-mq, c, 0);
+            }
+            if (t != 0) {
+                /* subnormal value */
+                return t < C_TINY
+                       ? toDecimal(Q_MIN, 10 * t, -1)
+                       : toDecimal(Q_MIN, t, 0);
+            }
+            return bits == 0 ? PLUS_ZERO : MINUS_ZERO;
+        }
+        if (t != 0) {
+            return NAN;
+        }
+        return bits > 0 ? PLUS_INF : MINUS_INF;
+    }
+
+    private int toDecimal(int q, int c, int dk) {
+        /*
+         * The skeleton corresponds to figure 7 of [1].
+         * The efficient computations are those summarized in figure 9.
+         * Also check the appendix.
+         *
+         * Here's a correspondence between Java names and names in [1],
+         * expressed as approximate LaTeX source code and informally.
+         * Other names are identical.
+         * cb:     \bar{c}     "c-bar"
+         * cbr:    \bar{c}_r   "c-bar-r"
+         * cbl:    \bar{c}_l   "c-bar-l"
+         *
+         * vb:     \bar{v}     "v-bar"
+         * vbr:    \bar{v}_r   "v-bar-r"
+         * vbl:    \bar{v}_l   "v-bar-l"
+         *
+         * rop:    r_o'        "r-o-prime"
+         */
+        int out = c & 0x1;
+        long cb = c << 2;
+        long cbr = cb + 2;
+        long cbl;
+        int k;
+        /*
+         * flog10pow2(e) = floor(log_10(2^e))
+         * flog10threeQuartersPow2(e) = floor(log_10(3/4 2^e))
+         * flog2pow10(e) = floor(log_2(10^e))
+         */
+        if (c != C_MIN | q == Q_MIN) {
+            /* regular spacing */
+            cbl = cb - 2;
+            k = flog10pow2(q);
+        } else {
+            /* irregular spacing */
+            cbl = cb - 1;
+            k = flog10threeQuartersPow2(q);
+        }
+        int h = q + flog2pow10(-k) + 33;
+
+        /* g is as in the appendix */
+        long g = g1(k) + 1;
+
+        int vb = rop(g, cb << h);
+        int vbl = rop(g, cbl << h);
+        int vbr = rop(g, cbr << h);
+
+        int s = vb >> 2;
+        if (s >= 100) {
+            /*
+             * For n = 9, m = 1 the table in section 10 of [1] shows
+             *     s' = floor(s / 10) = floor(s 1_717_986_919 / 2^34)
+             *
+             * sp10 = 10 s'
+             * tp10 = 10 t'
+             * upin    iff    u' = sp10 10^k in Rv
+             * wpin    iff    w' = tp10 10^k in Rv
+             * See section 9.3 of [1].
+             */
+            int sp10 = 10 * (int) (s * 1_717_986_919L >>> 34);
+            int tp10 = sp10 + 10;
+            boolean upin = vbl + out <= sp10 << 2;
+            boolean wpin = (tp10 << 2) + out <= vbr;
+            if (upin != wpin) {
+                return toChars(upin ? sp10 : tp10, k);
+            }
+        }
+
+        /*
+         * 10 <= s < 100    or    s >= 100  and  u', w' not in Rv
+         * uin    iff    u = s 10^k in Rv
+         * win    iff    w = t 10^k in Rv
+         * See section 9.3 of [1].
+         */
+        int t = s + 1;
+        boolean uin = vbl + out <= s << 2;
+        boolean win = (t << 2) + out <= vbr;
+        if (uin != win) {
+            /* Exactly one of u or w lies in Rv */
+            return toChars(uin ? s : t, k + dk);
+        }
+        /*
+         * Both u and w lie in Rv: determine the one closest to v.
+         * See section 9.3 of [1].
+         */
+        int cmp = vb - (s + t << 1);
+        return toChars(cmp < 0 || cmp == 0 && (s & 0x1) == 0 ? s : t, k + dk);
+    }
+
+    /*
+     * Computes rop(cp g 2^(-95))
+     * See appendix and figure 11 of [1].
+     */
+    private static int rop(long g, long cp) {
+        long x1 = multiplyHigh(g, cp);
+        long vbp = x1 >>> 31;
+        return (int) (vbp | (x1 & MASK_32) + MASK_32 >>> 32);
+    }
+
+    /*
+     * Formats the decimal f 10^e.
+     */
+    private int toChars(int f, int e) {
+        /*
+         * For details not discussed here see section 10 of [1].
+         *
+         * Determine len such that
+         *     10^(len-1) <= f < 10^len
+         */
+        int len = flog10pow2(Integer.SIZE - numberOfLeadingZeros(f));
+        if (f >= pow10(len)) {
+            len += 1;
+        }
+
+        /*
+         * Let fp and ep be the original f and e, respectively.
+         * Transform f and e to ensure
+         *     10^(H-1) <= f < 10^H
+         *     fp 10^ep = f 10^(e-H) = 0.f 10^e
+         */
+        f *= (int)pow10(H - len);
+        e += len;
+
+        /*
+         * The toChars?() methods perform left-to-right digits extraction
+         * using ints, provided that the arguments are limited to 8 digits.
+         * Therefore, split the H = 9 digits of f into:
+         *     h = the most significant digit of f
+         *     l = the last 8, least significant digits of f
+         *
+         * For n = 9, m = 8 the table in section 10 of [1] shows
+         *     floor(f / 10^8) = floor(1_441_151_881 f / 2^57)
+         */
+        int h = (int) (f * 1_441_151_881L >>> 57);
+        int l = f - 100_000_000 * h;
+
+        if (0 < e && e <= 7) {
+            return toChars1(h, l, e);
+        }
+        if (-3 < e && e <= 0) {
+            return toChars2(h, l, e);
+        }
+        return toChars3(h, l, e);
+    }
+
+    private int toChars1(int h, int l, int e) {
+        /*
+         * 0 < e <= 7: plain format without leading zeroes.
+         * Left-to-right digits extraction:
+         * algorithm 1 in [3], with b = 10, k = 8, n = 28.
+         */
+        appendDigit(h);
+        int y = y(l);
+        int t;
+        int i = 1;
+        for (; i < e; ++i) {
+            t = 10 * y;
+            appendDigit(t >>> 28);
+            y = t & MASK_28;
+        }
+        append('.');
+        for (; i <= 8; ++i) {
+            t = 10 * y;
+            appendDigit(t >>> 28);
+            y = t & MASK_28;
+        }
+        removeTrailingZeroes();
+        return NON_SPECIAL;
+    }
+
+    private int toChars2(int h, int l, int e) {
+        /* -3 < e <= 0: plain format with leading zeroes */
+        appendDigit(0);
+        append('.');
+        for (; e < 0; ++e) {
+          appendDigit(0);
+        }
+        appendDigit(h);
+        append8Digits(l);
+        removeTrailingZeroes();
+        return NON_SPECIAL;
+    }
+
+    private int toChars3(int h, int l, int e) {
+        /* -3 >= e | e > 7: computerized scientific notation */
+        appendDigit(h);
+        append('.');
+        append8Digits(l);
+        removeTrailingZeroes();
+        exponent(e - 1);
+        return NON_SPECIAL;
+    }
+
+    private void append8Digits(int m) {
+        /*
+         * Left-to-right digits extraction:
+         * algorithm 1 in [3], with b = 10, k = 8, n = 28.
+         */
+        int y = y(m);
+        for (int i = 0; i < 8; ++i) {
+            int t = 10 * y;
+            appendDigit(t >>> 28);
+            y = t & MASK_28;
+        }
+    }
+
+    private void removeTrailingZeroes() {
+        while (bytes[index] == '0') {
+            --index;
+        }
+        /* ... but do not remove the one directly to the right of '.' */
+        if (bytes[index] == '.') {
+            ++index;
+        }
+    }
+
+    private int y(int a) {
+        /*
+         * Algorithm 1 in [3] needs computation of
+         *     floor((a + 1) 2^n / b^k) - 1
+         * with a < 10^8, b = 10, k = 8, n = 28.
+         * Noting that
+         *     (a + 1) 2^n <= 10^8 2^28 < 10^17
+         * For n = 17, m = 8 the table in section 10 of [1] leads to:
+         */
+        return (int) (multiplyHigh(
+                (long) (a + 1) << 28,
+                193_428_131_138_340_668L) >>> 20) - 1;
+    }
+
+    private void exponent(int e) {
+        append('E');
+        if (e < 0) {
+            append('-');
+            e = -e;
+        }
+        if (e < 10) {
+            appendDigit(e);
+            return;
+        }
+        /*
+         * For n = 2, m = 1 the table in section 10 of [1] shows
+         *     floor(e / 10) = floor(103 e / 2^10)
+         */
+        int d = e * 103 >>> 10;
+        appendDigit(d);
+        appendDigit(e - 10 * d);
+    }
+
+    private void append(int c) {
+        bytes[++index] = (byte) c;
+    }
+
+    private void appendDigit(int d) {
+        bytes[++index] = (byte) ('0' + d);
+    }
+
+    /* Using the deprecated constructor enhances performance */
+    @SuppressWarnings("deprecation")
+    private String charsToString() {
+        return new String(bytes, 0, 0, index + 1);
+    }
+
+}
diff --git a/tests/test_data/std/jdk/internal/math/FloatingDecimal$1.class b/tests/test_data/std/jdk/internal/math/FloatingDecimal$1.class
new file mode 100644
index 0000000000000000000000000000000000000000..dda8ceae6b0d67a18546456d352bac3d8572cea0
GIT binary patch
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/math/FloatingDecimal$ASCIIToBinaryBuffer.class b/tests/test_data/std/jdk/internal/math/FloatingDecimal$ASCIIToBinaryBuffer.class
new file mode 100644
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diff --git a/tests/test_data/std/jdk/internal/math/FloatingDecimal$ASCIIToBinaryConverter.class b/tests/test_data/std/jdk/internal/math/FloatingDecimal$ASCIIToBinaryConverter.class
new file mode 100644
index 0000000000000000000000000000000000000000..52b0dc46d253229bc8e2582b25c979268ae1b682
GIT binary patch
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HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/math/FloatingDecimal$BinaryToASCIIBuffer.class b/tests/test_data/std/jdk/internal/math/FloatingDecimal$BinaryToASCIIBuffer.class
new file mode 100644
index 0000000000000000000000000000000000000000..d38e9a11c586d72c923e6d95c0237581e0e50901
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diff --git a/tests/test_data/std/jdk/internal/math/FloatingDecimal$BinaryToASCIIConverter.class b/tests/test_data/std/jdk/internal/math/FloatingDecimal$BinaryToASCIIConverter.class
new file mode 100644
index 0000000000000000000000000000000000000000..8fabf9f13d934bc8436c5dd9489fef7d886e832f
GIT binary patch
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diff --git a/tests/test_data/std/jdk/internal/math/FloatingDecimal$ExceptionalBinaryToASCIIBuffer.class b/tests/test_data/std/jdk/internal/math/FloatingDecimal$ExceptionalBinaryToASCIIBuffer.class
new file mode 100644
index 0000000000000000000000000000000000000000..5f471ac66a7817de5a88e44e1a8b9e2a3029f93a
GIT binary patch
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/math/FloatingDecimal$HexFloatPattern.class b/tests/test_data/std/jdk/internal/math/FloatingDecimal$HexFloatPattern.class
new file mode 100644
index 0000000000000000000000000000000000000000..3d4f843f06b03d95fb5f5520f78d1075b2cec978
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diff --git a/tests/test_data/std/jdk/internal/math/FloatingDecimal$PreparedASCIIToBinaryBuffer.class b/tests/test_data/std/jdk/internal/math/FloatingDecimal$PreparedASCIIToBinaryBuffer.class
new file mode 100644
index 0000000000000000000000000000000000000000..5a856fe09002cdb9d59ab69f7d3731f2a38e0a90
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literal 0
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diff --git a/tests/test_data/std/jdk/internal/math/FloatingDecimal.class b/tests/test_data/std/jdk/internal/math/FloatingDecimal.class
new file mode 100644
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diff --git a/tests/test_data/std/jdk/internal/math/FloatingDecimal.java b/tests/test_data/std/jdk/internal/math/FloatingDecimal.java
new file mode 100644
index 00000000..408b98ac
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/math/FloatingDecimal.java
@@ -0,0 +1,2551 @@
+/*
+ * Copyright (c) 1996, 2023, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package jdk.internal.math;
+
+import java.util.Arrays;
+import java.util.regex.*;
+
+/**
+ * A class for converting between ASCII and decimal representations of a single
+ * or double precision floating point number. Most conversions are provided via
+ * static convenience methods, although a <code>BinaryToASCIIConverter</code>
+ * instance may be obtained and reused.
+ */
+public class FloatingDecimal{
+    //
+    // Constants of the implementation;
+    // most are IEEE-754 related.
+    // (There are more really boring constants at the end.)
+    //
+    static final int    EXP_SHIFT = DoubleConsts.SIGNIFICAND_WIDTH - 1;
+    static final long   FRACT_HOB = ( 1L<<EXP_SHIFT ); // assumed High-Order bit
+    static final long   EXP_ONE   = ((long)DoubleConsts.EXP_BIAS)<<EXP_SHIFT; // exponent of 1.0
+    static final int    MAX_SMALL_BIN_EXP = 62;
+    static final int    MIN_SMALL_BIN_EXP = -( 63 / 3 );
+    static final int    MAX_DECIMAL_DIGITS = 15;
+    static final int    MAX_DECIMAL_EXPONENT = 308;
+    static final int    MIN_DECIMAL_EXPONENT = -324;
+    static final int    BIG_DECIMAL_EXPONENT = 324; // i.e. abs(MIN_DECIMAL_EXPONENT)
+    static final int    MAX_NDIGITS = 1100;
+
+    static final int    SINGLE_EXP_SHIFT  =   FloatConsts.SIGNIFICAND_WIDTH - 1;
+    static final int    SINGLE_FRACT_HOB  =   1<<SINGLE_EXP_SHIFT;
+    static final int    SINGLE_MAX_DECIMAL_DIGITS = 7;
+    static final int    SINGLE_MAX_DECIMAL_EXPONENT = 38;
+    static final int    SINGLE_MIN_DECIMAL_EXPONENT = -45;
+    static final int    SINGLE_MAX_NDIGITS = 200;
+
+    static final int    INT_DECIMAL_DIGITS = 9;
+
+    /**
+     * Converts a double precision floating point value to a <code>String</code>.
+     *
+     * @param d The double precision value.
+     * @return The value converted to a <code>String</code>.
+     */
+    public static String toJavaFormatString(double d) {
+        return getBinaryToASCIIConverter(d).toJavaFormatString();
+    }
+
+    /**
+     * Converts a single precision floating point value to a <code>String</code>.
+     *
+     * @param f The single precision value.
+     * @return The value converted to a <code>String</code>.
+     */
+    public static String toJavaFormatString(float f) {
+        return getBinaryToASCIIConverter(f).toJavaFormatString();
+    }
+
+    /**
+     * Appends a double precision floating point value to an <code>Appendable</code>.
+     * @param d The double precision value.
+     * @param buf The <code>Appendable</code> with the value appended.
+     */
+    public static void appendTo(double d, Appendable buf) {
+        getBinaryToASCIIConverter(d).appendTo(buf);
+    }
+
+    /**
+     * Appends a single precision floating point value to an <code>Appendable</code>.
+     * @param f The single precision value.
+     * @param buf The <code>Appendable</code> with the value appended.
+     */
+    public static void appendTo(float f, Appendable buf) {
+        getBinaryToASCIIConverter(f).appendTo(buf);
+    }
+
+    /**
+     * Converts a <code>String</code> to a double precision floating point value.
+     *
+     * @param s The <code>String</code> to convert.
+     * @return The double precision value.
+     * @throws NumberFormatException If the <code>String</code> does not
+     * represent a properly formatted double precision value.
+     */
+    public static double parseDouble(String s) throws NumberFormatException {
+        return readJavaFormatString(s).doubleValue();
+    }
+
+    /**
+     * Converts a <code>String</code> to a single precision floating point value.
+     *
+     * @param s The <code>String</code> to convert.
+     * @return The single precision value.
+     * @throws NumberFormatException If the <code>String</code> does not
+     * represent a properly formatted single precision value.
+     */
+    public static float parseFloat(String s) throws NumberFormatException {
+        return readJavaFormatString(s).floatValue();
+    }
+
+    /**
+     * A converter which can process single or double precision floating point
+     * values into an ASCII <code>String</code> representation.
+     */
+    public interface BinaryToASCIIConverter {
+        /**
+         * Converts a floating point value into an ASCII <code>String</code>.
+         * @return The value converted to a <code>String</code>.
+         */
+        String toJavaFormatString();
+
+        /**
+         * Appends a floating point value to an <code>Appendable</code>.
+         * @param buf The <code>Appendable</code> to receive the value.
+         */
+        void appendTo(Appendable buf);
+
+        /**
+         * Retrieves the decimal exponent most closely corresponding to this value.
+         * @return The decimal exponent.
+         */
+        int getDecimalExponent();
+
+        /**
+         * Retrieves the value as an array of digits.
+         * @param digits The digit array.
+         * @return The number of valid digits copied into the array.
+         */
+        int getDigits(char[] digits);
+
+        /**
+         * Indicates the sign of the value.
+         * @return {@code value < 0.0}.
+         */
+        boolean isNegative();
+
+        /**
+         * Indicates whether the value is either infinite or not a number.
+         *
+         * @return <code>true</code> if and only if the value is <code>NaN</code>
+         * or infinite.
+         */
+        boolean isExceptional();
+
+        /**
+         * Indicates whether the value was rounded up during the binary to ASCII
+         * conversion.
+         *
+         * @return <code>true</code> if and only if the value was rounded up.
+         */
+        boolean digitsRoundedUp();
+
+        /**
+         * Indicates whether the binary to ASCII conversion was exact.
+         *
+         * @return <code>true</code> if any only if the conversion was exact.
+         */
+        boolean decimalDigitsExact();
+    }
+
+    /**
+     * A <code>BinaryToASCIIConverter</code> which represents <code>NaN</code>
+     * and infinite values.
+     */
+    private static class ExceptionalBinaryToASCIIBuffer implements BinaryToASCIIConverter {
+        private final String image;
+        private boolean isNegative;
+
+        public ExceptionalBinaryToASCIIBuffer(String image, boolean isNegative) {
+            this.image = image;
+            this.isNegative = isNegative;
+        }
+
+        @Override
+        public String toJavaFormatString() {
+            return image;
+        }
+
+        @Override
+        public void appendTo(Appendable buf) {
+            if (buf instanceof StringBuilder) {
+                ((StringBuilder) buf).append(image);
+            } else if (buf instanceof StringBuffer) {
+                ((StringBuffer) buf).append(image);
+            } else {
+                assert false;
+            }
+        }
+
+        @Override
+        public int getDecimalExponent() {
+            throw new IllegalArgumentException("Exceptional value does not have an exponent");
+        }
+
+        @Override
+        public int getDigits(char[] digits) {
+            throw new IllegalArgumentException("Exceptional value does not have digits");
+        }
+
+        @Override
+        public boolean isNegative() {
+            return isNegative;
+        }
+
+        @Override
+        public boolean isExceptional() {
+            return true;
+        }
+
+        @Override
+        public boolean digitsRoundedUp() {
+            throw new IllegalArgumentException("Exceptional value is not rounded");
+        }
+
+        @Override
+        public boolean decimalDigitsExact() {
+            throw new IllegalArgumentException("Exceptional value is not exact");
+        }
+    }
+
+    private static final String INFINITY_REP = "Infinity";
+    private static final int INFINITY_LENGTH = INFINITY_REP.length();
+    private static final String NAN_REP = "NaN";
+    private static final int NAN_LENGTH = NAN_REP.length();
+
+    private static final BinaryToASCIIConverter B2AC_POSITIVE_INFINITY = new ExceptionalBinaryToASCIIBuffer(INFINITY_REP, false);
+    private static final BinaryToASCIIConverter B2AC_NEGATIVE_INFINITY = new ExceptionalBinaryToASCIIBuffer("-" + INFINITY_REP, true);
+    private static final BinaryToASCIIConverter B2AC_NOT_A_NUMBER = new ExceptionalBinaryToASCIIBuffer(NAN_REP, false);
+    private static final BinaryToASCIIConverter B2AC_POSITIVE_ZERO = new BinaryToASCIIBuffer(false, new char[]{'0'});
+    private static final BinaryToASCIIConverter B2AC_NEGATIVE_ZERO = new BinaryToASCIIBuffer(true,  new char[]{'0'});
+
+    /**
+     * A buffered implementation of <code>BinaryToASCIIConverter</code>.
+     */
+    static class BinaryToASCIIBuffer implements BinaryToASCIIConverter {
+        private boolean isNegative;
+        private int decExponent;
+        private int firstDigitIndex;
+        private int nDigits;
+        private final char[] digits;
+        private final char[] buffer = new char[26];
+
+        //
+        // The fields below provide additional information about the result of
+        // the binary to decimal digits conversion done in dtoa() and roundup()
+        // methods. They are changed if needed by those two methods.
+        //
+
+        // True if the dtoa() binary to decimal conversion was exact.
+        private boolean exactDecimalConversion = false;
+
+        // True if the result of the binary to decimal conversion was rounded-up
+        // at the end of the conversion process, i.e. roundUp() method was called.
+        private boolean decimalDigitsRoundedUp = false;
+
+        /**
+         * Default constructor; used for non-zero values,
+         * <code>BinaryToASCIIBuffer</code> may be thread-local and reused
+         */
+        BinaryToASCIIBuffer(){
+            this.digits = new char[20];
+        }
+
+        /**
+         * Creates a specialized value (positive and negative zeros).
+         */
+        BinaryToASCIIBuffer(boolean isNegative, char[] digits){
+            this.isNegative = isNegative;
+            this.decExponent  = 0;
+            this.digits = digits;
+            this.firstDigitIndex = 0;
+            this.nDigits = digits.length;
+        }
+
+        @Override
+        public String toJavaFormatString() {
+            int len = getChars(buffer);
+            return new String(buffer, 0, len);
+        }
+
+        @Override
+        public void appendTo(Appendable buf) {
+            int len = getChars(buffer);
+            if (buf instanceof StringBuilder) {
+                ((StringBuilder) buf).append(buffer, 0, len);
+            } else if (buf instanceof StringBuffer) {
+                ((StringBuffer) buf).append(buffer, 0, len);
+            } else {
+                assert false;
+            }
+        }
+
+        @Override
+        public int getDecimalExponent() {
+            return decExponent;
+        }
+
+        @Override
+        public int getDigits(char[] digits) {
+            System.arraycopy(this.digits, firstDigitIndex, digits, 0, this.nDigits);
+            return this.nDigits;
+        }
+
+        @Override
+        public boolean isNegative() {
+            return isNegative;
+        }
+
+        @Override
+        public boolean isExceptional() {
+            return false;
+        }
+
+        @Override
+        public boolean digitsRoundedUp() {
+            return decimalDigitsRoundedUp;
+        }
+
+        @Override
+        public boolean decimalDigitsExact() {
+            return exactDecimalConversion;
+        }
+
+        private void setSign(boolean isNegative) {
+            this.isNegative = isNegative;
+        }
+
+        /**
+         * This is the easy subcase --
+         * all the significant bits, after scaling, are held in lvalue.
+         * negSign and decExponent tell us what processing and scaling
+         * has already been done. Exceptional cases have already been
+         * stripped out.
+         * In particular:
+         * lvalue is a finite number (not Inf, nor NaN)
+         * lvalue > 0L (not zero, nor negative).
+         *
+         * The only reason that we develop the digits here, rather than
+         * calling on Long.toString() is that we can do it a little faster,
+         * and besides want to treat trailing 0s specially. If Long.toString
+         * changes, we should re-evaluate this strategy!
+         */
+        private void developLongDigits( int decExponent, long lvalue, int insignificantDigits ){
+            if ( insignificantDigits != 0 ){
+                // Discard non-significant low-order bits, while rounding,
+                // up to insignificant value.
+                long pow10 = FDBigInteger.LONG_5_POW[insignificantDigits] << insignificantDigits; // 10^i == 5^i * 2^i;
+                long residue = lvalue % pow10;
+                lvalue /= pow10;
+                decExponent += insignificantDigits;
+                if ( residue >= (pow10>>1) ){
+                    // round up based on the low-order bits we're discarding
+                    lvalue++;
+                }
+            }
+            int  digitno = digits.length -1;
+            int  c;
+            if ( lvalue <= Integer.MAX_VALUE ){
+                assert lvalue > 0L : lvalue; // lvalue <= 0
+                // even easier subcase!
+                // can do int arithmetic rather than long!
+                int  ivalue = (int)lvalue;
+                c = ivalue%10;
+                ivalue /= 10;
+                while ( c == 0 ){
+                    decExponent++;
+                    c = ivalue%10;
+                    ivalue /= 10;
+                }
+                while ( ivalue != 0){
+                    digits[digitno--] = (char)(c+'0');
+                    decExponent++;
+                    c = ivalue%10;
+                    ivalue /= 10;
+                }
+                digits[digitno] = (char)(c+'0');
+            } else {
+                // same algorithm as above (same bugs, too )
+                // but using long arithmetic.
+                c = (int)(lvalue%10L);
+                lvalue /= 10L;
+                while ( c == 0 ){
+                    decExponent++;
+                    c = (int)(lvalue%10L);
+                    lvalue /= 10L;
+                }
+                while ( lvalue != 0L ){
+                    digits[digitno--] = (char)(c+'0');
+                    decExponent++;
+                    c = (int)(lvalue%10L);
+                    lvalue /= 10;
+                }
+                digits[digitno] = (char)(c+'0');
+            }
+            this.decExponent = decExponent+1;
+            this.firstDigitIndex = digitno;
+            this.nDigits = this.digits.length - digitno;
+        }
+
+        private void dtoa( int binExp, long fractBits, int nSignificantBits, boolean isCompatibleFormat)
+        {
+            assert fractBits > 0 ; // fractBits here can't be zero or negative
+            assert (fractBits & FRACT_HOB)!=0  ; // Hi-order bit should be set
+            // Examine number. Determine if it is an easy case,
+            // which we can do pretty trivially using float/long conversion,
+            // or whether we must do real work.
+            final int tailZeros = Long.numberOfTrailingZeros(fractBits);
+
+            // number of significant bits of fractBits;
+            final int nFractBits = EXP_SHIFT+1-tailZeros;
+
+            // reset flags to default values as dtoa() does not always set these
+            // flags and a prior call to dtoa() might have set them to incorrect
+            // values with respect to the current state.
+            decimalDigitsRoundedUp = false;
+            exactDecimalConversion = false;
+
+            // number of significant bits to the right of the point.
+            int nTinyBits = Math.max( 0, nFractBits - binExp - 1 );
+            if ( binExp <= MAX_SMALL_BIN_EXP && binExp >= MIN_SMALL_BIN_EXP ){
+                // Look more closely at the number to decide if,
+                // with scaling by 10^nTinyBits, the result will fit in
+                // a long.
+                if ( (nTinyBits < FDBigInteger.LONG_5_POW.length) && ((nFractBits + N_5_BITS[nTinyBits]) < 64 ) ){
+                    //
+                    // We can do this:
+                    // take the fraction bits, which are normalized.
+                    // (a) nTinyBits == 0: Shift left or right appropriately
+                    //     to align the binary point at the extreme right, i.e.
+                    //     where a long int point is expected to be. The integer
+                    //     result is easily converted to a string.
+                    // (b) nTinyBits > 0: Shift right by EXP_SHIFT-nFractBits,
+                    //     which effectively converts to long and scales by
+                    //     2^nTinyBits. Then multiply by 5^nTinyBits to
+                    //     complete the scaling. We know this won't overflow
+                    //     because we just counted the number of bits necessary
+                    //     in the result. The integer you get from this can
+                    //     then be converted to a string pretty easily.
+                    //
+                    if ( nTinyBits == 0 ) {
+                        int insignificant;
+                        if ( binExp > nSignificantBits ){
+                            insignificant = insignificantDigitsForPow2(binExp-nSignificantBits-1);
+                        } else {
+                            insignificant = 0;
+                        }
+                        if ( binExp >= EXP_SHIFT ){
+                            fractBits <<= (binExp-EXP_SHIFT);
+                        } else {
+                            fractBits >>>= (EXP_SHIFT-binExp) ;
+                        }
+                        developLongDigits( 0, fractBits, insignificant );
+                        return;
+                    }
+                    //
+                    // The following causes excess digits to be printed
+                    // out in the single-float case. Our manipulation of
+                    // halfULP here is apparently not correct. If we
+                    // better understand how this works, perhaps we can
+                    // use this special case again. But for the time being,
+                    // we do not.
+                    // else {
+                    //     fractBits >>>= EXP_SHIFT+1-nFractBits;
+                    //     fractBits//= long5pow[ nTinyBits ];
+                    //     halfULP = long5pow[ nTinyBits ] >> (1+nSignificantBits-nFractBits);
+                    //     developLongDigits( -nTinyBits, fractBits, insignificantDigits(halfULP) );
+                    //     return;
+                    // }
+                    //
+                }
+            }
+            //
+            // This is the hard case. We are going to compute large positive
+            // integers B and S and integer decExp, s.t.
+            //      d = ( B / S )// 10^decExp
+            //      1 <= B / S < 10
+            // Obvious choices are:
+            //      decExp = floor( log10(d) )
+            //      B      = d// 2^nTinyBits// 10^max( 0, -decExp )
+            //      S      = 10^max( 0, decExp)// 2^nTinyBits
+            // (noting that nTinyBits has already been forced to non-negative)
+            // I am also going to compute a large positive integer
+            //      M      = (1/2^nSignificantBits)// 2^nTinyBits// 10^max( 0, -decExp )
+            // i.e. M is (1/2) of the ULP of d, scaled like B.
+            // When we iterate through dividing B/S and picking off the
+            // quotient bits, we will know when to stop when the remainder
+            // is <= M.
+            //
+            // We keep track of powers of 2 and powers of 5.
+            //
+            int decExp = estimateDecExp(fractBits,binExp);
+            int B2, B5; // powers of 2 and powers of 5, respectively, in B
+            int S2, S5; // powers of 2 and powers of 5, respectively, in S
+            int M2, M5; // powers of 2 and powers of 5, respectively, in M
+
+            B5 = Math.max( 0, -decExp );
+            B2 = B5 + nTinyBits + binExp;
+
+            S5 = Math.max( 0, decExp );
+            S2 = S5 + nTinyBits;
+
+            M5 = B5;
+            M2 = B2 - nSignificantBits;
+
+            //
+            // the long integer fractBits contains the (nFractBits) interesting
+            // bits from the mantissa of d ( hidden 1 added if necessary) followed
+            // by (EXP_SHIFT+1-nFractBits) zeros. In the interest of compactness,
+            // I will shift out those zeros before turning fractBits into a
+            // FDBigInteger. The resulting whole number will be
+            //      d * 2^(nFractBits-1-binExp).
+            //
+            fractBits >>>= tailZeros;
+            B2 -= nFractBits-1;
+            int common2factor = Math.min( B2, S2 );
+            B2 -= common2factor;
+            S2 -= common2factor;
+            M2 -= common2factor;
+
+            //
+            // HACK!! For exact powers of two, the next smallest number
+            // is only half as far away as we think (because the meaning of
+            // ULP changes at power-of-two bounds) for this reason, we
+            // hack M2. Hope this works.
+            //
+            if ( nFractBits == 1 ) {
+                M2 -= 1;
+            }
+
+            if ( M2 < 0 ){
+                // oops.
+                // since we cannot scale M down far enough,
+                // we must scale the other values up.
+                B2 -= M2;
+                S2 -= M2;
+                M2 =  0;
+            }
+            //
+            // Construct, Scale, iterate.
+            // Some day, we'll write a stopping test that takes
+            // account of the asymmetry of the spacing of floating-point
+            // numbers below perfect powers of 2
+            // 26 Sept 96 is not that day.
+            // So we use a symmetric test.
+            //
+            int ndigit = 0;
+            boolean low, high;
+            long lowDigitDifference;
+            int  q;
+
+            //
+            // Detect the special cases where all the numbers we are about
+            // to compute will fit in int or long integers.
+            // In these cases, we will avoid doing FDBigInteger arithmetic.
+            // We use the same algorithms, except that we "normalize"
+            // our FDBigIntegers before iterating. This is to make division easier,
+            // as it makes our fist guess (quotient of high-order words)
+            // more accurate!
+            //
+            // Some day, we'll write a stopping test that takes
+            // account of the asymmetry of the spacing of floating-point
+            // numbers below perfect powers of 2
+            // 26 Sept 96 is not that day.
+            // So we use a symmetric test.
+            //
+            // binary digits needed to represent B, approx.
+            int Bbits = nFractBits + B2 + (( B5 < N_5_BITS.length )? N_5_BITS[B5] : ( B5*3 ));
+
+            // binary digits needed to represent 10*S, approx.
+            int tenSbits = S2+1 + (( (S5+1) < N_5_BITS.length )? N_5_BITS[(S5+1)] : ( (S5+1)*3 ));
+            if ( Bbits < 64 && tenSbits < 64){
+                if ( Bbits < 32 && tenSbits < 32){
+                    // wa-hoo! They're all ints!
+                    int b = ((int)fractBits * FDBigInteger.SMALL_5_POW[B5] ) << B2;
+                    int s = FDBigInteger.SMALL_5_POW[S5] << S2;
+                    int m = FDBigInteger.SMALL_5_POW[M5] << M2;
+                    int tens = s * 10;
+                    //
+                    // Unroll the first iteration. If our decExp estimate
+                    // was too high, our first quotient will be zero. In this
+                    // case, we discard it and decrement decExp.
+                    //
+                    ndigit = 0;
+                    q = b / s;
+                    b = 10 * ( b % s );
+                    m *= 10;
+                    low  = (b <  m );
+                    high = (b+m > tens );
+                    assert q < 10 : q; // excessively large digit
+                    if ( (q == 0) && ! high ){
+                        // oops. Usually ignore leading zero.
+                        decExp--;
+                    } else {
+                        digits[ndigit++] = (char)('0' + q);
+                    }
+                    //
+                    // HACK! Java spec sez that we always have at least
+                    // one digit after the . in either F- or E-form output.
+                    // Thus we will need more than one digit if we're using
+                    // E-form
+                    //
+                    if ( !isCompatibleFormat ||decExp < -3 || decExp >= 8 ){
+                        high = low = false;
+                    }
+                    while( ! low && ! high ){
+                        q = b / s;
+                        b = 10 * ( b % s );
+                        m *= 10;
+                        assert q < 10 : q; // excessively large digit
+                        if ( m > 0L ){
+                            low  = (b <  m );
+                            high = (b+m > tens );
+                        } else {
+                            // hack -- m might overflow!
+                            // in this case, it is certainly > b,
+                            // which won't
+                            // and b+m > tens, too, since that has overflowed
+                            // either!
+                            low = true;
+                            high = true;
+                        }
+                        digits[ndigit++] = (char)('0' + q);
+                    }
+                    lowDigitDifference = (b<<1) - tens;
+                    exactDecimalConversion  = (b == 0);
+                } else {
+                    // still good! they're all longs!
+                    long b = (fractBits * FDBigInteger.LONG_5_POW[B5] ) << B2;
+                    long s = FDBigInteger.LONG_5_POW[S5] << S2;
+                    long m = FDBigInteger.LONG_5_POW[M5] << M2;
+                    long tens = s * 10L;
+                    //
+                    // Unroll the first iteration. If our decExp estimate
+                    // was too high, our first quotient will be zero. In this
+                    // case, we discard it and decrement decExp.
+                    //
+                    ndigit = 0;
+                    q = (int) ( b / s );
+                    b = 10L * ( b % s );
+                    m *= 10L;
+                    low  = (b <  m );
+                    high = (b+m > tens );
+                    assert q < 10 : q; // excessively large digit
+                    if ( (q == 0) && ! high ){
+                        // oops. Usually ignore leading zero.
+                        decExp--;
+                    } else {
+                        digits[ndigit++] = (char)('0' + q);
+                    }
+                    //
+                    // HACK! Java spec sez that we always have at least
+                    // one digit after the . in either F- or E-form output.
+                    // Thus we will need more than one digit if we're using
+                    // E-form
+                    //
+                    if ( !isCompatibleFormat || decExp < -3 || decExp >= 8 ){
+                        high = low = false;
+                    }
+                    while( ! low && ! high ){
+                        q = (int) ( b / s );
+                        b = 10 * ( b % s );
+                        m *= 10;
+                        assert q < 10 : q;  // excessively large digit
+                        if ( m > 0L ){
+                            low  = (b <  m );
+                            high = (b+m > tens );
+                        } else {
+                            // hack -- m might overflow!
+                            // in this case, it is certainly > b,
+                            // which won't
+                            // and b+m > tens, too, since that has overflowed
+                            // either!
+                            low = true;
+                            high = true;
+                        }
+                        digits[ndigit++] = (char)('0' + q);
+                    }
+                    lowDigitDifference = (b<<1) - tens;
+                    exactDecimalConversion  = (b == 0);
+                }
+            } else {
+                //
+                // We really must do FDBigInteger arithmetic.
+                // Fist, construct our FDBigInteger initial values.
+                //
+                FDBigInteger Sval = FDBigInteger.valueOfPow52(S5, S2);
+                int shiftBias = Sval.getNormalizationBias();
+                Sval = Sval.leftShift(shiftBias); // normalize so that division works better
+
+                FDBigInteger Bval = FDBigInteger.valueOfMulPow52(fractBits, B5, B2 + shiftBias);
+                FDBigInteger Mval = FDBigInteger.valueOfPow52(M5 + 1, M2 + shiftBias + 1);
+
+                FDBigInteger tenSval = FDBigInteger.valueOfPow52(S5 + 1, S2 + shiftBias + 1); //Sval.mult( 10 );
+                //
+                // Unroll the first iteration. If our decExp estimate
+                // was too high, our first quotient will be zero. In this
+                // case, we discard it and decrement decExp.
+                //
+                ndigit = 0;
+                q = Bval.quoRemIteration( Sval );
+                low  = (Bval.cmp( Mval ) < 0);
+                high = tenSval.addAndCmp(Bval,Mval)<=0;
+
+                assert q < 10 : q; // excessively large digit
+                if ( (q == 0) && ! high ){
+                    // oops. Usually ignore leading zero.
+                    decExp--;
+                } else {
+                    digits[ndigit++] = (char)('0' + q);
+                }
+                //
+                // HACK! Java spec sez that we always have at least
+                // one digit after the . in either F- or E-form output.
+                // Thus we will need more than one digit if we're using
+                // E-form
+                //
+                if (!isCompatibleFormat || decExp < -3 || decExp >= 8 ){
+                    high = low = false;
+                }
+                while( ! low && ! high ){
+                    q = Bval.quoRemIteration( Sval );
+                    assert q < 10 : q;  // excessively large digit
+                    Mval = Mval.multBy10(); //Mval = Mval.mult( 10 );
+                    low  = (Bval.cmp( Mval ) < 0);
+                    high = tenSval.addAndCmp(Bval,Mval)<=0;
+                    digits[ndigit++] = (char)('0' + q);
+                }
+                if ( high && low ){
+                    Bval = Bval.leftShift(1);
+                    lowDigitDifference = Bval.cmp(tenSval);
+                } else {
+                    lowDigitDifference = 0L; // this here only for flow analysis!
+                }
+                exactDecimalConversion  = (Bval.cmp( FDBigInteger.ZERO ) == 0);
+            }
+            this.decExponent = decExp+1;
+            this.firstDigitIndex = 0;
+            this.nDigits = ndigit;
+            //
+            // Last digit gets rounded based on stopping condition.
+            //
+            if ( high ){
+                if ( low ){
+                    if ( lowDigitDifference == 0L ){
+                        // it's a tie!
+                        // choose based on which digits we like.
+                        if ( (digits[firstDigitIndex+nDigits-1]&1) != 0 ) {
+                            roundup();
+                        }
+                    } else if ( lowDigitDifference > 0 ){
+                        roundup();
+                    }
+                } else {
+                    roundup();
+                }
+            }
+        }
+
+        // add one to the least significant digit.
+        // in the unlikely event there is a carry out, deal with it.
+        // assert that this will only happen where there
+        // is only one digit, e.g. (float)1e-44 seems to do it.
+        //
+        private void roundup() {
+            int i = (firstDigitIndex + nDigits - 1);
+            int q = digits[i];
+            if (q == '9') {
+                while (q == '9' && i > firstDigitIndex) {
+                    digits[i] = '0';
+                    q = digits[--i];
+                }
+                if (q == '9') {
+                    // carryout! High-order 1, rest 0s, larger exp.
+                    decExponent += 1;
+                    digits[firstDigitIndex] = '1';
+                    return;
+                }
+                // else fall through.
+            }
+            digits[i] = (char) (q + 1);
+            decimalDigitsRoundedUp = true;
+        }
+
+        /**
+         * Estimate decimal exponent. (If it is small-ish,
+         * we could double-check.)
+         *
+         * First, scale the mantissa bits such that 1 <= d2 < 2.
+         * We are then going to estimate
+         *          log10(d2) ~=~  (d2-1.5)/1.5 + log(1.5)
+         * and so we can estimate
+         *      log10(d) ~=~ log10(d2) + binExp * log10(2)
+         * take the floor and call it decExp.
+         */
+        static int estimateDecExp(long fractBits, int binExp) {
+            double d2 = Double.longBitsToDouble( EXP_ONE | ( fractBits & DoubleConsts.SIGNIF_BIT_MASK ) );
+            double d = (d2-1.5D)*0.289529654D + 0.176091259 + (double)binExp * 0.301029995663981;
+            long dBits = Double.doubleToRawLongBits(d);  //can't be NaN here so use raw
+            int exponent = (int)((dBits & DoubleConsts.EXP_BIT_MASK) >> EXP_SHIFT) - DoubleConsts.EXP_BIAS;
+            boolean isNegative = (dBits & DoubleConsts.SIGN_BIT_MASK) != 0; // discover sign
+            if(exponent>=0 && exponent<52) { // hot path
+                long mask   = DoubleConsts.SIGNIF_BIT_MASK >> exponent;
+                int r = (int)(( (dBits&DoubleConsts.SIGNIF_BIT_MASK) | FRACT_HOB )>>(EXP_SHIFT-exponent));
+                return isNegative ? (((mask & dBits) == 0L ) ? -r : -r-1 ) : r;
+            } else if (exponent < 0) {
+                return (((dBits&~DoubleConsts.SIGN_BIT_MASK) == 0) ? 0 :
+                        ( (isNegative) ? -1 : 0) );
+            } else { //if (exponent >= 52)
+                return (int)d;
+            }
+        }
+
+        private static int insignificantDigits(long insignificant) {
+            int i;
+            for ( i = 0; insignificant >= 10L; i++ ) {
+                insignificant /= 10L;
+            }
+            return i;
+        }
+
+        /**
+         * Calculates
+         * <pre>
+         * insignificantDigitsForPow2(v) == insignificantDigits(1L<<v)
+         * </pre>
+         */
+        private static int insignificantDigitsForPow2(int p2) {
+            if (p2 > 1 && p2 < insignificantDigitsNumber.length) {
+                return insignificantDigitsNumber[p2];
+            }
+            return 0;
+        }
+
+        /**
+         *  If insignificant==(1L << ixd)
+         *  i = insignificantDigitsNumber[idx] is the same as:
+         *  int i;
+         *  for ( i = 0; insignificant >= 10L; i++ )
+         *         insignificant /= 10L;
+         */
+        private static final int[] insignificantDigitsNumber = {
+            0, 0, 0, 0, 1, 1, 1, 2, 2, 2, 3, 3, 3, 3,
+            4, 4, 4, 5, 5, 5, 6, 6, 6, 6, 7, 7, 7,
+            8, 8, 8, 9, 9, 9, 9, 10, 10, 10, 11, 11, 11,
+            12, 12, 12, 12, 13, 13, 13, 14, 14, 14,
+            15, 15, 15, 15, 16, 16, 16, 17, 17, 17,
+            18, 18, 18, 19
+        };
+
+        // approximately ceil( log2( long5pow[i] ) )
+        private static final int[] N_5_BITS = {
+                0,
+                3,
+                5,
+                7,
+                10,
+                12,
+                14,
+                17,
+                19,
+                21,
+                24,
+                26,
+                28,
+                31,
+                33,
+                35,
+                38,
+                40,
+                42,
+                45,
+                47,
+                49,
+                52,
+                54,
+                56,
+                59,
+                61,
+        };
+
+        private int getChars(char[] result) {
+            assert nDigits <= 19 : nDigits; // generous bound on size of nDigits
+            int i = 0;
+            if (isNegative) {
+                result[0] = '-';
+                i = 1;
+            }
+            if (decExponent > 0 && decExponent < 8) {
+                // print digits.digits.
+                int charLength = Math.min(nDigits, decExponent);
+                System.arraycopy(digits, firstDigitIndex, result, i, charLength);
+                i += charLength;
+                if (charLength < decExponent) {
+                    charLength = decExponent - charLength;
+                    Arrays.fill(result,i,i+charLength,'0');
+                    i += charLength;
+                    result[i++] = '.';
+                    result[i++] = '0';
+                } else {
+                    result[i++] = '.';
+                    if (charLength < nDigits) {
+                        int t = nDigits - charLength;
+                        System.arraycopy(digits, firstDigitIndex+charLength, result, i, t);
+                        i += t;
+                    } else {
+                        result[i++] = '0';
+                    }
+                }
+            } else if (decExponent <= 0 && decExponent > -3) {
+                result[i++] = '0';
+                result[i++] = '.';
+                if (decExponent != 0) {
+                    Arrays.fill(result, i, i-decExponent, '0');
+                    i -= decExponent;
+                }
+                System.arraycopy(digits, firstDigitIndex, result, i, nDigits);
+                i += nDigits;
+            } else {
+                result[i++] = digits[firstDigitIndex];
+                result[i++] = '.';
+                if (nDigits > 1) {
+                    System.arraycopy(digits, firstDigitIndex+1, result, i, nDigits - 1);
+                    i += nDigits - 1;
+                } else {
+                    result[i++] = '0';
+                }
+                result[i++] = 'E';
+                int e;
+                if (decExponent <= 0) {
+                    result[i++] = '-';
+                    e = -decExponent + 1;
+                } else {
+                    e = decExponent - 1;
+                }
+                // decExponent has 1, 2, or 3, digits
+                if (e <= 9) {
+                    result[i++] = (char) (e + '0');
+                } else if (e <= 99) {
+                    result[i++] = (char) (e / 10 + '0');
+                    result[i++] = (char) (e % 10 + '0');
+                } else {
+                    result[i++] = (char) (e / 100 + '0');
+                    e %= 100;
+                    result[i++] = (char) (e / 10 + '0');
+                    result[i++] = (char) (e % 10 + '0');
+                }
+            }
+            return i;
+        }
+
+    }
+
+    private static final ThreadLocal<BinaryToASCIIBuffer> threadLocalBinaryToASCIIBuffer =
+            new ThreadLocal<BinaryToASCIIBuffer>() {
+                @Override
+                protected BinaryToASCIIBuffer initialValue() {
+                    return new BinaryToASCIIBuffer();
+                }
+            };
+
+    private static BinaryToASCIIBuffer getBinaryToASCIIBuffer() {
+        return threadLocalBinaryToASCIIBuffer.get();
+    }
+
+    /**
+     * A converter which can process an ASCII <code>String</code> representation
+     * of a single or double precision floating point value into a
+     * <code>float</code> or a <code>double</code>.
+     */
+    interface ASCIIToBinaryConverter {
+
+        double doubleValue();
+
+        float floatValue();
+
+    }
+
+    /**
+     * A <code>ASCIIToBinaryConverter</code> container for a <code>double</code>.
+     */
+    static class PreparedASCIIToBinaryBuffer implements ASCIIToBinaryConverter {
+        private final double doubleVal;
+        private final float floatVal;
+
+        public PreparedASCIIToBinaryBuffer(double doubleVal, float floatVal) {
+            this.doubleVal = doubleVal;
+            this.floatVal = floatVal;
+        }
+
+        @Override
+        public double doubleValue() {
+            return doubleVal;
+        }
+
+        @Override
+        public float floatValue() {
+            return floatVal;
+        }
+    }
+
+    static final ASCIIToBinaryConverter A2BC_POSITIVE_INFINITY = new PreparedASCIIToBinaryBuffer(Double.POSITIVE_INFINITY, Float.POSITIVE_INFINITY);
+    static final ASCIIToBinaryConverter A2BC_NEGATIVE_INFINITY = new PreparedASCIIToBinaryBuffer(Double.NEGATIVE_INFINITY, Float.NEGATIVE_INFINITY);
+    static final ASCIIToBinaryConverter A2BC_NOT_A_NUMBER  = new PreparedASCIIToBinaryBuffer(Double.NaN, Float.NaN);
+    static final ASCIIToBinaryConverter A2BC_POSITIVE_ZERO = new PreparedASCIIToBinaryBuffer(0.0d, 0.0f);
+    static final ASCIIToBinaryConverter A2BC_NEGATIVE_ZERO = new PreparedASCIIToBinaryBuffer(-0.0d, -0.0f);
+
+    /**
+     * A buffered implementation of <code>ASCIIToBinaryConverter</code>.
+     */
+    static class ASCIIToBinaryBuffer implements ASCIIToBinaryConverter {
+        boolean     isNegative;
+        int         decExponent;
+        char        digits[];
+        int         nDigits;
+
+        ASCIIToBinaryBuffer( boolean negSign, int decExponent, char[] digits, int n)
+        {
+            this.isNegative = negSign;
+            this.decExponent = decExponent;
+            this.digits = digits;
+            this.nDigits = n;
+        }
+
+        /**
+         * Takes a FloatingDecimal, which we presumably just scanned in,
+         * and finds out what its value is, as a double.
+         *
+         * AS A SIDE EFFECT, SET roundDir TO INDICATE PREFERRED
+         * ROUNDING DIRECTION in case the result is really destined
+         * for a single-precision float.
+         */
+        @Override
+        public double doubleValue() {
+            int kDigits = Math.min(nDigits, MAX_DECIMAL_DIGITS + 1);
+            //
+            // convert the lead kDigits to a long integer.
+            //
+            // (special performance hack: start to do it using int)
+            int iValue = (int) digits[0] - (int) '0';
+            int iDigits = Math.min(kDigits, INT_DECIMAL_DIGITS);
+            for (int i = 1; i < iDigits; i++) {
+                iValue = iValue * 10 + (int) digits[i] - (int) '0';
+            }
+            long lValue = (long) iValue;
+            for (int i = iDigits; i < kDigits; i++) {
+                lValue = lValue * 10L + (long) ((int) digits[i] - (int) '0');
+            }
+            double dValue = (double) lValue;
+            int exp = decExponent - kDigits;
+            //
+            // lValue now contains a long integer with the value of
+            // the first kDigits digits of the number.
+            // dValue contains the (double) of the same.
+            //
+
+            if (nDigits <= MAX_DECIMAL_DIGITS) {
+                //
+                // possibly an easy case.
+                // We know that the digits can be represented
+                // exactly. And if the exponent isn't too outrageous,
+                // the whole thing can be done with one operation,
+                // thus one rounding error.
+                // Note that all our constructors trim all leading and
+                // trailing zeros, so simple values (including zero)
+                // will always end up here
+                //
+                if (exp == 0 || dValue == 0.0) {
+                    return (isNegative) ? -dValue : dValue; // small floating integer
+                }
+                else if (exp >= 0) {
+                    if (exp <= MAX_SMALL_TEN) {
+                        //
+                        // Can get the answer with one operation,
+                        // thus one roundoff.
+                        //
+                        double rValue = dValue * SMALL_10_POW[exp];
+                        return (isNegative) ? -rValue : rValue;
+                    }
+                    int slop = MAX_DECIMAL_DIGITS - kDigits;
+                    if (exp <= MAX_SMALL_TEN + slop) {
+                        //
+                        // We can multiply dValue by 10^(slop)
+                        // and it is still "small" and exact.
+                        // Then we can multiply by 10^(exp-slop)
+                        // with one rounding.
+                        //
+                        dValue *= SMALL_10_POW[slop];
+                        double rValue = dValue * SMALL_10_POW[exp - slop];
+                        return (isNegative) ? -rValue : rValue;
+                    }
+                    //
+                    // Else we have a hard case with a positive exp.
+                    //
+                } else {
+                    if (exp >= -MAX_SMALL_TEN) {
+                        //
+                        // Can get the answer in one division.
+                        //
+                        double rValue = dValue / SMALL_10_POW[-exp];
+                        return (isNegative) ? -rValue : rValue;
+                    }
+                    //
+                    // Else we have a hard case with a negative exp.
+                    //
+                }
+            }
+
+            //
+            // Harder cases:
+            // The sum of digits plus exponent is greater than
+            // what we think we can do with one error.
+            //
+            // Start by approximating the right answer by,
+            // naively, scaling by powers of 10.
+            //
+            if (exp > 0) {
+                if (decExponent > MAX_DECIMAL_EXPONENT + 1) {
+                    //
+                    // Lets face it. This is going to be
+                    // Infinity. Cut to the chase.
+                    //
+                    return (isNegative) ? Double.NEGATIVE_INFINITY : Double.POSITIVE_INFINITY;
+                }
+                if ((exp & 15) != 0) {
+                    dValue *= SMALL_10_POW[exp & 15];
+                }
+                if ((exp >>= 4) != 0) {
+                    int j;
+                    for (j = 0; exp > 1; j++, exp >>= 1) {
+                        if ((exp & 1) != 0) {
+                            dValue *= BIG_10_POW[j];
+                        }
+                    }
+                    //
+                    // The reason for the weird exp > 1 condition
+                    // in the above loop was so that the last multiply
+                    // would get unrolled. We handle it here.
+                    // It could overflow.
+                    //
+                    double t = dValue * BIG_10_POW[j];
+                    if (Double.isInfinite(t)) {
+                        //
+                        // It did overflow.
+                        // Look more closely at the result.
+                        // If the exponent is just one too large,
+                        // then use the maximum finite as our estimate
+                        // value. Else call the result infinity
+                        // and punt it.
+                        // ( I presume this could happen because
+                        // rounding forces the result here to be
+                        // an ULP or two larger than
+                        // Double.MAX_VALUE ).
+                        //
+                        t = dValue / 2.0;
+                        t *= BIG_10_POW[j];
+                        if (Double.isInfinite(t)) {
+                            return (isNegative) ? Double.NEGATIVE_INFINITY : Double.POSITIVE_INFINITY;
+                        }
+                        t = Double.MAX_VALUE;
+                    }
+                    dValue = t;
+                }
+            } else if (exp < 0) {
+                exp = -exp;
+                if (decExponent < MIN_DECIMAL_EXPONENT - 1) {
+                    //
+                    // Lets face it. This is going to be
+                    // zero. Cut to the chase.
+                    //
+                    return (isNegative) ? -0.0 : 0.0;
+                }
+                if ((exp & 15) != 0) {
+                    dValue /= SMALL_10_POW[exp & 15];
+                }
+                if ((exp >>= 4) != 0) {
+                    int j;
+                    for (j = 0; exp > 1; j++, exp >>= 1) {
+                        if ((exp & 1) != 0) {
+                            dValue *= TINY_10_POW[j];
+                        }
+                    }
+                    //
+                    // The reason for the weird exp > 1 condition
+                    // in the above loop was so that the last multiply
+                    // would get unrolled. We handle it here.
+                    // It could underflow.
+                    //
+                    double t = dValue * TINY_10_POW[j];
+                    if (t == 0.0) {
+                        //
+                        // It did underflow.
+                        // Look more closely at the result.
+                        // If the exponent is just one too small,
+                        // then use the minimum finite as our estimate
+                        // value. Else call the result 0.0
+                        // and punt it.
+                        // ( I presume this could happen because
+                        // rounding forces the result here to be
+                        // an ULP or two less than
+                        // Double.MIN_VALUE ).
+                        //
+                        t = dValue * 2.0;
+                        t *= TINY_10_POW[j];
+                        if (t == 0.0) {
+                            return (isNegative) ? -0.0 : 0.0;
+                        }
+                        t = Double.MIN_VALUE;
+                    }
+                    dValue = t;
+                }
+            }
+
+            //
+            // dValue is now approximately the result.
+            // The hard part is adjusting it, by comparison
+            // with FDBigInteger arithmetic.
+            // Formulate the EXACT big-number result as
+            // bigD0 * 10^exp
+            //
+            if (nDigits > MAX_NDIGITS) {
+                nDigits = MAX_NDIGITS + 1;
+                digits[MAX_NDIGITS] = '1';
+            }
+            FDBigInteger bigD0 = new FDBigInteger(lValue, digits, kDigits, nDigits);
+            exp = decExponent - nDigits;
+
+            long ieeeBits = Double.doubleToRawLongBits(dValue); // IEEE-754 bits of double candidate
+            final int B5 = Math.max(0, -exp); // powers of 5 in bigB, value is not modified inside correctionLoop
+            final int D5 = Math.max(0, exp); // powers of 5 in bigD, value is not modified inside correctionLoop
+            bigD0 = bigD0.multByPow52(D5, 0);
+            bigD0.makeImmutable();   // prevent bigD0 modification inside correctionLoop
+            FDBigInteger bigD = null;
+            int prevD2 = 0;
+
+            correctionLoop:
+            while (true) {
+                // here ieeeBits can't be NaN, Infinity or zero
+                int binexp = (int) (ieeeBits >>> EXP_SHIFT);
+                long bigBbits = ieeeBits & DoubleConsts.SIGNIF_BIT_MASK;
+                if (binexp > 0) {
+                    bigBbits |= FRACT_HOB;
+                } else { // Normalize denormalized numbers.
+                    assert bigBbits != 0L : bigBbits; // doubleToBigInt(0.0)
+                    int leadingZeros = Long.numberOfLeadingZeros(bigBbits);
+                    int shift = leadingZeros - (63 - EXP_SHIFT);
+                    bigBbits <<= shift;
+                    binexp = 1 - shift;
+                }
+                binexp -= DoubleConsts.EXP_BIAS;
+                int lowOrderZeros = Long.numberOfTrailingZeros(bigBbits);
+                bigBbits >>>= lowOrderZeros;
+                final int bigIntExp = binexp - EXP_SHIFT + lowOrderZeros;
+                final int bigIntNBits = EXP_SHIFT + 1 - lowOrderZeros;
+
+                //
+                // Scale bigD, bigB appropriately for
+                // big-integer operations.
+                // Naively, we multiply by powers of ten
+                // and powers of two. What we actually do
+                // is keep track of the powers of 5 and
+                // powers of 2 we would use, then factor out
+                // common divisors before doing the work.
+                //
+                int B2 = B5; // powers of 2 in bigB
+                int D2 = D5; // powers of 2 in bigD
+                int Ulp2;   // powers of 2 in halfUlp.
+                if (bigIntExp >= 0) {
+                    B2 += bigIntExp;
+                } else {
+                    D2 -= bigIntExp;
+                }
+                Ulp2 = B2;
+                // shift bigB and bigD left by a number s. t.
+                // halfUlp is still an integer.
+                int hulpbias;
+                if (binexp <= -DoubleConsts.EXP_BIAS) {
+                    // This is going to be a denormalized number
+                    // (if not actually zero).
+                    // half an ULP is at 2^-(DoubleConsts.EXP_BIAS+EXP_SHIFT+1)
+                    hulpbias = binexp + lowOrderZeros + DoubleConsts.EXP_BIAS;
+                } else {
+                    hulpbias = 1 + lowOrderZeros;
+                }
+                B2 += hulpbias;
+                D2 += hulpbias;
+                // if there are common factors of 2, we might just as well
+                // factor them out, as they add nothing useful.
+                int common2 = Math.min(B2, Math.min(D2, Ulp2));
+                B2 -= common2;
+                D2 -= common2;
+                Ulp2 -= common2;
+                // do multiplications by powers of 5 and 2
+                FDBigInteger bigB = FDBigInteger.valueOfMulPow52(bigBbits, B5, B2);
+                if (bigD == null || prevD2 != D2) {
+                    bigD = bigD0.leftShift(D2);
+                    prevD2 = D2;
+                }
+                //
+                // to recap:
+                // bigB is the scaled-big-int version of our floating-point
+                // candidate.
+                // bigD is the scaled-big-int version of the exact value
+                // as we understand it.
+                // halfUlp is 1/2 an ulp of bigB, except for special cases
+                // of exact powers of 2
+                //
+                // the plan is to compare bigB with bigD, and if the difference
+                // is less than halfUlp, then we're satisfied. Otherwise,
+                // use the ratio of difference to halfUlp to calculate a fudge
+                // factor to add to the floating value, then go 'round again.
+                //
+                FDBigInteger diff;
+                int cmpResult;
+                boolean overvalue;
+                if ((cmpResult = bigB.cmp(bigD)) > 0) {
+                    overvalue = true; // our candidate is too big.
+                    diff = bigB.leftInplaceSub(bigD); // bigB is not user further - reuse
+                    if ((bigIntNBits == 1) && (bigIntExp > -DoubleConsts.EXP_BIAS + 1)) {
+                        // candidate is a normalized exact power of 2 and
+                        // is too big (larger than Double.MIN_NORMAL). We will be subtracting.
+                        // For our purposes, ulp is the ulp of the
+                        // next smaller range.
+                        Ulp2 -= 1;
+                        if (Ulp2 < 0) {
+                            // rats. Cannot de-scale ulp this far.
+                            // must scale diff in other direction.
+                            Ulp2 = 0;
+                            diff = diff.leftShift(1);
+                        }
+                    }
+                } else if (cmpResult < 0) {
+                    overvalue = false; // our candidate is too small.
+                    diff = bigD.rightInplaceSub(bigB); // bigB is not user further - reuse
+                } else {
+                    // the candidate is exactly right!
+                    // this happens with surprising frequency
+                    break correctionLoop;
+                }
+                cmpResult = diff.cmpPow52(B5, Ulp2);
+                if ((cmpResult) < 0) {
+                    // difference is small.
+                    // this is close enough
+                    break correctionLoop;
+                } else if (cmpResult == 0) {
+                    // difference is exactly half an ULP
+                    // round to some other value maybe, then finish
+                    if ((ieeeBits & 1) != 0) { // half ties to even
+                        ieeeBits += overvalue ? -1 : 1; // nextDown or nextUp
+                    }
+                    break correctionLoop;
+                } else {
+                    // difference is non-trivial.
+                    // could scale addend by ratio of difference to
+                    // halfUlp here, if we bothered to compute that difference.
+                    // Most of the time ( I hope ) it is about 1 anyway.
+                    ieeeBits += overvalue ? -1 : 1; // nextDown or nextUp
+                    if (ieeeBits == 0 || ieeeBits == DoubleConsts.EXP_BIT_MASK) { // 0.0 or Double.POSITIVE_INFINITY
+                        break correctionLoop; // oops. Fell off end of range.
+                    }
+                    continue; // try again.
+                }
+
+            }
+            if (isNegative) {
+                ieeeBits |= DoubleConsts.SIGN_BIT_MASK;
+            }
+            return Double.longBitsToDouble(ieeeBits);
+        }
+
+        /**
+         * Takes a FloatingDecimal, which we presumably just scanned in,
+         * and finds out what its value is, as a float.
+         * This is distinct from doubleValue() to avoid the extremely
+         * unlikely case of a double rounding error, wherein the conversion
+         * to double has one rounding error, and the conversion of that double
+         * to a float has another rounding error, IN THE WRONG DIRECTION,
+         * ( because of the preference to a zero low-order bit ).
+         */
+        @Override
+        public float floatValue() {
+            int kDigits = Math.min(nDigits, SINGLE_MAX_DECIMAL_DIGITS + 1);
+            //
+            // convert the lead kDigits to an integer.
+            //
+            int iValue = (int) digits[0] - (int) '0';
+            for (int i = 1; i < kDigits; i++) {
+                iValue = iValue * 10 + (int) digits[i] - (int) '0';
+            }
+            float fValue = (float) iValue;
+            int exp = decExponent - kDigits;
+            //
+            // iValue now contains an integer with the value of
+            // the first kDigits digits of the number.
+            // fValue contains the (float) of the same.
+            //
+
+            if (nDigits <= SINGLE_MAX_DECIMAL_DIGITS) {
+                //
+                // possibly an easy case.
+                // We know that the digits can be represented
+                // exactly. And if the exponent isn't too outrageous,
+                // the whole thing can be done with one operation,
+                // thus one rounding error.
+                // Note that all our constructors trim all leading and
+                // trailing zeros, so simple values (including zero)
+                // will always end up here.
+                //
+                if (exp == 0 || fValue == 0.0f) {
+                    return (isNegative) ? -fValue : fValue; // small floating integer
+                } else if (exp >= 0) {
+                    if (exp <= SINGLE_MAX_SMALL_TEN) {
+                        //
+                        // Can get the answer with one operation,
+                        // thus one roundoff.
+                        //
+                        fValue *= SINGLE_SMALL_10_POW[exp];
+                        return (isNegative) ? -fValue : fValue;
+                    }
+                    int slop = SINGLE_MAX_DECIMAL_DIGITS - kDigits;
+                    if (exp <= SINGLE_MAX_SMALL_TEN + slop) {
+                        //
+                        // We can multiply fValue by 10^(slop)
+                        // and it is still "small" and exact.
+                        // Then we can multiply by 10^(exp-slop)
+                        // with one rounding.
+                        //
+                        fValue *= SINGLE_SMALL_10_POW[slop];
+                        fValue *= SINGLE_SMALL_10_POW[exp - slop];
+                        return (isNegative) ? -fValue : fValue;
+                    }
+                    //
+                    // Else we have a hard case with a positive exp.
+                    //
+                } else {
+                    if (exp >= -SINGLE_MAX_SMALL_TEN) {
+                        //
+                        // Can get the answer in one division.
+                        //
+                        fValue /= SINGLE_SMALL_10_POW[-exp];
+                        return (isNegative) ? -fValue : fValue;
+                    }
+                    //
+                    // Else we have a hard case with a negative exp.
+                    //
+                }
+            } else if ((decExponent >= nDigits) && (nDigits + decExponent <= MAX_DECIMAL_DIGITS)) {
+                //
+                // In double-precision, this is an exact floating integer.
+                // So we can compute to double, then shorten to float
+                // with one round, and get the right answer.
+                //
+                // First, finish accumulating digits.
+                // Then convert that integer to a double, multiply
+                // by the appropriate power of ten, and convert to float.
+                //
+                long lValue = (long) iValue;
+                for (int i = kDigits; i < nDigits; i++) {
+                    lValue = lValue * 10L + (long) ((int) digits[i] - (int) '0');
+                }
+                double dValue = (double) lValue;
+                exp = decExponent - nDigits;
+                dValue *= SMALL_10_POW[exp];
+                fValue = (float) dValue;
+                return (isNegative) ? -fValue : fValue;
+
+            }
+            //
+            // Harder cases:
+            // The sum of digits plus exponent is greater than
+            // what we think we can do with one error.
+            //
+            // Start by approximating the right answer by,
+            // naively, scaling by powers of 10.
+            // Scaling uses doubles to avoid overflow/underflow.
+            //
+            double dValue = fValue;
+            if (exp > 0) {
+                if (decExponent > SINGLE_MAX_DECIMAL_EXPONENT + 1) {
+                    //
+                    // Lets face it. This is going to be
+                    // Infinity. Cut to the chase.
+                    //
+                    return (isNegative) ? Float.NEGATIVE_INFINITY : Float.POSITIVE_INFINITY;
+                }
+                if ((exp & 15) != 0) {
+                    dValue *= SMALL_10_POW[exp & 15];
+                }
+                if ((exp >>= 4) != 0) {
+                    int j;
+                    for (j = 0; exp > 0; j++, exp >>= 1) {
+                        if ((exp & 1) != 0) {
+                            dValue *= BIG_10_POW[j];
+                        }
+                    }
+                }
+            } else if (exp < 0) {
+                exp = -exp;
+                if (decExponent < SINGLE_MIN_DECIMAL_EXPONENT - 1) {
+                    //
+                    // Lets face it. This is going to be
+                    // zero. Cut to the chase.
+                    //
+                    return (isNegative) ? -0.0f : 0.0f;
+                }
+                if ((exp & 15) != 0) {
+                    dValue /= SMALL_10_POW[exp & 15];
+                }
+                if ((exp >>= 4) != 0) {
+                    int j;
+                    for (j = 0; exp > 0; j++, exp >>= 1) {
+                        if ((exp & 1) != 0) {
+                            dValue *= TINY_10_POW[j];
+                        }
+                    }
+                }
+            }
+            fValue = Math.clamp((float) dValue, Float.MIN_VALUE, Float.MAX_VALUE);
+
+            //
+            // fValue is now approximately the result.
+            // The hard part is adjusting it, by comparison
+            // with FDBigInteger arithmetic.
+            // Formulate the EXACT big-number result as
+            // bigD0 * 10^exp
+            //
+            if (nDigits > SINGLE_MAX_NDIGITS) {
+                nDigits = SINGLE_MAX_NDIGITS + 1;
+                digits[SINGLE_MAX_NDIGITS] = '1';
+            }
+            FDBigInteger bigD0 = new FDBigInteger(iValue, digits, kDigits, nDigits);
+            exp = decExponent - nDigits;
+
+            int ieeeBits = Float.floatToRawIntBits(fValue); // IEEE-754 bits of float candidate
+            final int B5 = Math.max(0, -exp); // powers of 5 in bigB, value is not modified inside correctionLoop
+            final int D5 = Math.max(0, exp); // powers of 5 in bigD, value is not modified inside correctionLoop
+            bigD0 = bigD0.multByPow52(D5, 0);
+            bigD0.makeImmutable();   // prevent bigD0 modification inside correctionLoop
+            FDBigInteger bigD = null;
+            int prevD2 = 0;
+
+            correctionLoop:
+            while (true) {
+                // here ieeeBits can't be NaN, Infinity or zero
+                int binexp = ieeeBits >>> SINGLE_EXP_SHIFT;
+                int bigBbits = ieeeBits & FloatConsts.SIGNIF_BIT_MASK;
+                if (binexp > 0) {
+                    bigBbits |= SINGLE_FRACT_HOB;
+                } else { // Normalize denormalized numbers.
+                    assert bigBbits != 0 : bigBbits; // floatToBigInt(0.0)
+                    int leadingZeros = Integer.numberOfLeadingZeros(bigBbits);
+                    int shift = leadingZeros - (31 - SINGLE_EXP_SHIFT);
+                    bigBbits <<= shift;
+                    binexp = 1 - shift;
+                }
+                binexp -= FloatConsts.EXP_BIAS;
+                int lowOrderZeros = Integer.numberOfTrailingZeros(bigBbits);
+                bigBbits >>>= lowOrderZeros;
+                final int bigIntExp = binexp - SINGLE_EXP_SHIFT + lowOrderZeros;
+                final int bigIntNBits = SINGLE_EXP_SHIFT + 1 - lowOrderZeros;
+
+                //
+                // Scale bigD, bigB appropriately for
+                // big-integer operations.
+                // Naively, we multiply by powers of ten
+                // and powers of two. What we actually do
+                // is keep track of the powers of 5 and
+                // powers of 2 we would use, then factor out
+                // common divisors before doing the work.
+                //
+                int B2 = B5; // powers of 2 in bigB
+                int D2 = D5; // powers of 2 in bigD
+                int Ulp2;   // powers of 2 in halfUlp.
+                if (bigIntExp >= 0) {
+                    B2 += bigIntExp;
+                } else {
+                    D2 -= bigIntExp;
+                }
+                Ulp2 = B2;
+                // shift bigB and bigD left by a number s. t.
+                // halfUlp is still an integer.
+                int hulpbias;
+                if (binexp <= -FloatConsts.EXP_BIAS) {
+                    // This is going to be a denormalized number
+                    // (if not actually zero).
+                    // half an ULP is at 2^-(FloatConsts.EXP_BIAS+SINGLE_EXP_SHIFT+1)
+                    hulpbias = binexp + lowOrderZeros + FloatConsts.EXP_BIAS;
+                } else {
+                    hulpbias = 1 + lowOrderZeros;
+                }
+                B2 += hulpbias;
+                D2 += hulpbias;
+                // if there are common factors of 2, we might just as well
+                // factor them out, as they add nothing useful.
+                int common2 = Math.min(B2, Math.min(D2, Ulp2));
+                B2 -= common2;
+                D2 -= common2;
+                Ulp2 -= common2;
+                // do multiplications by powers of 5 and 2
+                FDBigInteger bigB = FDBigInteger.valueOfMulPow52(bigBbits, B5, B2);
+                if (bigD == null || prevD2 != D2) {
+                    bigD = bigD0.leftShift(D2);
+                    prevD2 = D2;
+                }
+                //
+                // to recap:
+                // bigB is the scaled-big-int version of our floating-point
+                // candidate.
+                // bigD is the scaled-big-int version of the exact value
+                // as we understand it.
+                // halfUlp is 1/2 an ulp of bigB, except for special cases
+                // of exact powers of 2
+                //
+                // the plan is to compare bigB with bigD, and if the difference
+                // is less than halfUlp, then we're satisfied. Otherwise,
+                // use the ratio of difference to halfUlp to calculate a fudge
+                // factor to add to the floating value, then go 'round again.
+                //
+                FDBigInteger diff;
+                int cmpResult;
+                boolean overvalue;
+                if ((cmpResult = bigB.cmp(bigD)) > 0) {
+                    overvalue = true; // our candidate is too big.
+                    diff = bigB.leftInplaceSub(bigD); // bigB is not user further - reuse
+                    if ((bigIntNBits == 1) && (bigIntExp > -FloatConsts.EXP_BIAS + 1)) {
+                        // candidate is a normalized exact power of 2 and
+                        // is too big (larger than Float.MIN_NORMAL). We will be subtracting.
+                        // For our purposes, ulp is the ulp of the
+                        // next smaller range.
+                        Ulp2 -= 1;
+                        if (Ulp2 < 0) {
+                            // rats. Cannot de-scale ulp this far.
+                            // must scale diff in other direction.
+                            Ulp2 = 0;
+                            diff = diff.leftShift(1);
+                        }
+                    }
+                } else if (cmpResult < 0) {
+                    overvalue = false; // our candidate is too small.
+                    diff = bigD.rightInplaceSub(bigB); // bigB is not user further - reuse
+                } else {
+                    // the candidate is exactly right!
+                    // this happens with surprising frequency
+                    break correctionLoop;
+                }
+                cmpResult = diff.cmpPow52(B5, Ulp2);
+                if ((cmpResult) < 0) {
+                    // difference is small.
+                    // this is close enough
+                    break correctionLoop;
+                } else if (cmpResult == 0) {
+                    // difference is exactly half an ULP
+                    // round to some other value maybe, then finish
+                    if ((ieeeBits & 1) != 0) { // half ties to even
+                        ieeeBits += overvalue ? -1 : 1; // nextDown or nextUp
+                    }
+                    break correctionLoop;
+                } else {
+                    // difference is non-trivial.
+                    // could scale addend by ratio of difference to
+                    // halfUlp here, if we bothered to compute that difference.
+                    // Most of the time ( I hope ) it is about 1 anyway.
+                    ieeeBits += overvalue ? -1 : 1; // nextDown or nextUp
+                    if (ieeeBits == 0 || ieeeBits == FloatConsts.EXP_BIT_MASK) { // 0.0 or Float.POSITIVE_INFINITY
+                        break correctionLoop; // oops. Fell off end of range.
+                    }
+                    continue; // try again.
+                }
+
+            }
+            if (isNegative) {
+                ieeeBits |= FloatConsts.SIGN_BIT_MASK;
+            }
+            return Float.intBitsToFloat(ieeeBits);
+        }
+
+
+        /**
+         * All the positive powers of 10 that can be
+         * represented exactly in double/float.
+         */
+        private static final double[] SMALL_10_POW = {
+            1.0e0,
+            1.0e1, 1.0e2, 1.0e3, 1.0e4, 1.0e5,
+            1.0e6, 1.0e7, 1.0e8, 1.0e9, 1.0e10,
+            1.0e11, 1.0e12, 1.0e13, 1.0e14, 1.0e15,
+            1.0e16, 1.0e17, 1.0e18, 1.0e19, 1.0e20,
+            1.0e21, 1.0e22
+        };
+
+        private static final float[] SINGLE_SMALL_10_POW = {
+            1.0e0f,
+            1.0e1f, 1.0e2f, 1.0e3f, 1.0e4f, 1.0e5f,
+            1.0e6f, 1.0e7f, 1.0e8f, 1.0e9f, 1.0e10f
+        };
+
+        private static final double[] BIG_10_POW = {
+            1e16, 1e32, 1e64, 1e128, 1e256 };
+        private static final double[] TINY_10_POW = {
+            1e-16, 1e-32, 1e-64, 1e-128, 1e-256 };
+
+        private static final int MAX_SMALL_TEN = SMALL_10_POW.length-1;
+        private static final int SINGLE_MAX_SMALL_TEN = SINGLE_SMALL_10_POW.length-1;
+
+    }
+
+    /**
+     * Returns a <code>BinaryToASCIIConverter</code> for a <code>double</code>.
+     * The returned object is a <code>ThreadLocal</code> variable of this class.
+     *
+     * @param d The double precision value to convert.
+     * @return The converter.
+     */
+    public static BinaryToASCIIConverter getBinaryToASCIIConverter(double d) {
+        return getBinaryToASCIIConverter(d, true);
+    }
+
+    /**
+     * Returns a <code>BinaryToASCIIConverter</code> for a <code>double</code>.
+     * The returned object is a <code>ThreadLocal</code> variable of this class.
+     *
+     * @param d The double precision value to convert.
+     * @param isCompatibleFormat
+     * @return The converter.
+     */
+    static BinaryToASCIIConverter getBinaryToASCIIConverter(double d, boolean isCompatibleFormat) {
+        long dBits = Double.doubleToRawLongBits(d);
+        boolean isNegative = (dBits&DoubleConsts.SIGN_BIT_MASK) != 0; // discover sign
+        long fractBits = dBits & DoubleConsts.SIGNIF_BIT_MASK;
+        int  binExp = (int)( (dBits&DoubleConsts.EXP_BIT_MASK) >> EXP_SHIFT );
+        // Discover obvious special cases of NaN and Infinity.
+        if ( binExp == (int)(DoubleConsts.EXP_BIT_MASK>>EXP_SHIFT) ) {
+            if ( fractBits == 0L ){
+                return isNegative ? B2AC_NEGATIVE_INFINITY : B2AC_POSITIVE_INFINITY;
+            } else {
+                return B2AC_NOT_A_NUMBER;
+            }
+        }
+        // Finish unpacking
+        // Normalize denormalized numbers.
+        // Insert assumed high-order bit for normalized numbers.
+        // Subtract exponent bias.
+        int  nSignificantBits;
+        if ( binExp == 0 ){
+            if ( fractBits == 0L ){
+                // not a denorm, just a 0!
+                return isNegative ? B2AC_NEGATIVE_ZERO : B2AC_POSITIVE_ZERO;
+            }
+            int leadingZeros = Long.numberOfLeadingZeros(fractBits);
+            int shift = leadingZeros-(63-EXP_SHIFT);
+            fractBits <<= shift;
+            binExp = 1 - shift;
+            nSignificantBits =  64-leadingZeros; // recall binExp is  - shift count.
+        } else {
+            fractBits |= FRACT_HOB;
+            nSignificantBits = EXP_SHIFT+1;
+        }
+        binExp -= DoubleConsts.EXP_BIAS;
+        BinaryToASCIIBuffer buf = getBinaryToASCIIBuffer();
+        buf.setSign(isNegative);
+        // call the routine that actually does all the hard work.
+        buf.dtoa(binExp, fractBits, nSignificantBits, isCompatibleFormat);
+        return buf;
+    }
+
+    private static BinaryToASCIIConverter getBinaryToASCIIConverter(float f) {
+        int fBits = Float.floatToRawIntBits( f );
+        boolean isNegative = (fBits&FloatConsts.SIGN_BIT_MASK) != 0;
+        int fractBits = fBits&FloatConsts.SIGNIF_BIT_MASK;
+        int binExp = (fBits&FloatConsts.EXP_BIT_MASK) >> SINGLE_EXP_SHIFT;
+        // Discover obvious special cases of NaN and Infinity.
+        if ( binExp == (FloatConsts.EXP_BIT_MASK>>SINGLE_EXP_SHIFT) ) {
+            if ( fractBits == 0L ){
+                return isNegative ? B2AC_NEGATIVE_INFINITY : B2AC_POSITIVE_INFINITY;
+            } else {
+                return B2AC_NOT_A_NUMBER;
+            }
+        }
+        // Finish unpacking
+        // Normalize denormalized numbers.
+        // Insert assumed high-order bit for normalized numbers.
+        // Subtract exponent bias.
+        int  nSignificantBits;
+        if ( binExp == 0 ){
+            if ( fractBits == 0 ){
+                // not a denorm, just a 0!
+                return isNegative ? B2AC_NEGATIVE_ZERO : B2AC_POSITIVE_ZERO;
+            }
+            int leadingZeros = Integer.numberOfLeadingZeros(fractBits);
+            int shift = leadingZeros-(31-SINGLE_EXP_SHIFT);
+            fractBits <<= shift;
+            binExp = 1 - shift;
+            nSignificantBits =  32 - leadingZeros; // recall binExp is  - shift count.
+        } else {
+            fractBits |= SINGLE_FRACT_HOB;
+            nSignificantBits = SINGLE_EXP_SHIFT+1;
+        }
+        binExp -= FloatConsts.EXP_BIAS;
+        BinaryToASCIIBuffer buf = getBinaryToASCIIBuffer();
+        buf.setSign(isNegative);
+        // call the routine that actually does all the hard work.
+        buf.dtoa(binExp, ((long)fractBits)<<(EXP_SHIFT-SINGLE_EXP_SHIFT), nSignificantBits, true);
+        return buf;
+    }
+
+    @SuppressWarnings("fallthrough")
+    static ASCIIToBinaryConverter readJavaFormatString( String in ) throws NumberFormatException {
+        boolean isNegative = false;
+        boolean signSeen   = false;
+        int     decExp;
+        char    c;
+
+    parseNumber:
+        try{
+            in = in.trim(); // don't fool around with white space.
+                            // throws NullPointerException if null
+            int len = in.length();
+            if ( len == 0 ) {
+                throw new NumberFormatException("empty String");
+            }
+            int i = 0;
+            switch (in.charAt(i)){
+            case '-':
+                isNegative = true;
+                //FALLTHROUGH
+            case '+':
+                i++;
+                signSeen = true;
+            }
+            c = in.charAt(i);
+            if(c == 'N') { // Check for NaN
+                if((len-i)==NAN_LENGTH && in.indexOf(NAN_REP,i)==i) {
+                    return A2BC_NOT_A_NUMBER;
+                }
+                // something went wrong, throw exception
+                break parseNumber;
+            } else if(c == 'I') { // Check for Infinity strings
+                if((len-i)==INFINITY_LENGTH && in.indexOf(INFINITY_REP,i)==i) {
+                    return isNegative? A2BC_NEGATIVE_INFINITY : A2BC_POSITIVE_INFINITY;
+                }
+                // something went wrong, throw exception
+                break parseNumber;
+            } else if (c == '0')  { // check for hexadecimal floating-point number
+                if (len > i+1 ) {
+                    char ch = in.charAt(i+1);
+                    if (ch == 'x' || ch == 'X' ) { // possible hex string
+                        return parseHexString(in);
+                    }
+                }
+            }  // look for and process decimal floating-point string
+
+            char[] digits = new char[ len ];
+            boolean decSeen = false;
+            int nDigits = 0;
+            int decPt = 0;
+            int nLeadZero = 0;
+            int nTrailZero = 0;
+
+        skipLeadingZerosLoop:
+            while (i < len) {
+                c = in.charAt(i);
+                if (c == '0') {
+                    nLeadZero++;
+                } else if (c == '.') {
+                    if (decSeen) {
+                        // already saw one ., this is the 2nd.
+                        throw new NumberFormatException("multiple points");
+                    }
+                    decPt = i;
+                    if (signSeen) {
+                        decPt -= 1;
+                    }
+                    decSeen = true;
+                } else {
+                    break skipLeadingZerosLoop;
+                }
+                i++;
+            }
+        digitLoop:
+            while (i < len) {
+                c = in.charAt(i);
+                if (c >= '1' && c <= '9') {
+                    digits[nDigits++] = c;
+                    nTrailZero = 0;
+                } else if (c == '0') {
+                    digits[nDigits++] = c;
+                    nTrailZero++;
+                } else if (c == '.') {
+                    if (decSeen) {
+                        // already saw one ., this is the 2nd.
+                        throw new NumberFormatException("multiple points");
+                    }
+                    decPt = i;
+                    if (signSeen) {
+                        decPt -= 1;
+                    }
+                    decSeen = true;
+                } else {
+                    break digitLoop;
+                }
+                i++;
+            }
+            nDigits -=nTrailZero;
+            //
+            // At this point, we've scanned all the digits and decimal
+            // point we're going to see. Trim off leading and trailing
+            // zeros, which will just confuse us later, and adjust
+            // our initial decimal exponent accordingly.
+            // To review:
+            // we have seen i total characters.
+            // nLeadZero of them were zeros before any other digits.
+            // nTrailZero of them were zeros after any other digits.
+            // if ( decSeen ), then a . was seen after decPt characters
+            // ( including leading zeros which have been discarded )
+            // nDigits characters were neither lead nor trailing
+            // zeros, nor point
+            //
+            //
+            // special hack: if we saw no non-zero digits, then the
+            // answer is zero!
+            // Unfortunately, we feel honor-bound to keep parsing!
+            //
+            boolean isZero = (nDigits == 0);
+            if ( isZero &&  nLeadZero == 0 ){
+                // we saw NO DIGITS AT ALL,
+                // not even a crummy 0!
+                // this is not allowed.
+                break parseNumber; // go throw exception
+            }
+            //
+            // Our initial exponent is decPt, adjusted by the number of
+            // discarded zeros. Or, if there was no decPt,
+            // then its just nDigits adjusted by discarded trailing zeros.
+            //
+            if ( decSeen ){
+                decExp = decPt - nLeadZero;
+            } else {
+                decExp = nDigits + nTrailZero;
+            }
+
+            //
+            // Look for 'e' or 'E' and an optionally signed integer.
+            //
+            if ( (i < len) &&  (((c = in.charAt(i) )=='e') || (c == 'E') ) ){
+                int expSign = 1;
+                int expVal  = 0;
+                int reallyBig = Integer.MAX_VALUE / 10;
+                boolean expOverflow = false;
+                switch( in.charAt(++i) ){
+                case '-':
+                    expSign = -1;
+                    //FALLTHROUGH
+                case '+':
+                    i++;
+                }
+                int expAt = i;
+            expLoop:
+                while ( i < len  ){
+                    if ( expVal >= reallyBig ){
+                        // the next character will cause integer
+                        // overflow.
+                        expOverflow = true;
+                    }
+                    c = in.charAt(i++);
+                    if(c>='0' && c<='9') {
+                        expVal = expVal*10 + ( (int)c - (int)'0' );
+                    } else {
+                        i--;           // back up.
+                        break expLoop; // stop parsing exponent.
+                    }
+                }
+                int expLimit = BIG_DECIMAL_EXPONENT + nDigits + nTrailZero;
+                if (expOverflow || (expVal > expLimit)) {
+                    // There is still a chance that the exponent will be safe to
+                    // use: if it would eventually decrease due to a negative
+                    // decExp, and that number is below the limit.  We check for
+                    // that here.
+                    if (!expOverflow && (expSign == 1 && decExp < 0)
+                            && (expVal + decExp) < expLimit) {
+                        // Cannot overflow: adding a positive and negative number.
+                        decExp += expVal;
+                    } else {
+                        //
+                        // The intent here is to end up with
+                        // infinity or zero, as appropriate.
+                        // The reason for yielding such a small decExponent,
+                        // rather than something intuitive such as
+                        // expSign*Integer.MAX_VALUE, is that this value
+                        // is subject to further manipulation in
+                        // doubleValue() and floatValue(), and I don't want
+                        // it to be able to cause overflow there!
+                        // (The only way we can get into trouble here is for
+                        // really outrageous nDigits+nTrailZero, such as 2
+                        // billion.)
+                        //
+                        decExp = expSign * expLimit;
+                    }
+                } else {
+                    // this should not overflow, since we tested
+                    // for expVal > (MAX+N), where N >= abs(decExp)
+                    decExp = decExp + expSign*expVal;
+                }
+
+                // if we saw something not a digit ( or end of string )
+                // after the [Ee][+-], without seeing any digits at all
+                // this is certainly an error. If we saw some digits,
+                // but then some trailing garbage, that might be ok.
+                // so we just fall through in that case.
+                // HUMBUG
+                if ( i == expAt ) {
+                    break parseNumber; // certainly bad
+                }
+            }
+            //
+            // We parsed everything we could.
+            // If there are leftovers, then this is not good input!
+            //
+            if ( i < len &&
+                ((i != len - 1) ||
+                (in.charAt(i) != 'f' &&
+                 in.charAt(i) != 'F' &&
+                 in.charAt(i) != 'd' &&
+                 in.charAt(i) != 'D'))) {
+                break parseNumber; // go throw exception
+            }
+            if(isZero) {
+                return isNegative ? A2BC_NEGATIVE_ZERO : A2BC_POSITIVE_ZERO;
+            }
+            return new ASCIIToBinaryBuffer(isNegative, decExp, digits, nDigits);
+        } catch ( StringIndexOutOfBoundsException e ){ }
+        throw new NumberFormatException("For input string: \"" + in + "\"");
+    }
+
+    private static class HexFloatPattern {
+        /**
+         * Grammar is compatible with hexadecimal floating-point constants
+         * described in section 6.4.4.2 of the C99 specification.
+         */
+        private static final Pattern VALUE = Pattern.compile(
+                   //1           234                   56                7                   8      9
+                    "([-+])?0[xX](((\\p{XDigit}+)\\.?)|((\\p{XDigit}*)\\.(\\p{XDigit}+)))[pP]([-+])?(\\p{Digit}+)[fFdD]?"
+                    );
+    }
+
+    /**
+     * Converts string s to a suitable floating decimal; uses the
+     * double constructor and sets the roundDir variable appropriately
+     * in case the value is later converted to a float.
+     *
+     * @param s The <code>String</code> to parse.
+     */
+   static ASCIIToBinaryConverter parseHexString(String s) {
+            // Verify string is a member of the hexadecimal floating-point
+            // string language.
+            Matcher m = HexFloatPattern.VALUE.matcher(s);
+            boolean validInput = m.matches();
+            if (!validInput) {
+                // Input does not match pattern
+                throw new NumberFormatException("For input string: \"" + s + "\"");
+            } else { // validInput
+                //
+                // We must isolate the sign, significand, and exponent
+                // fields.  The sign value is straightforward.  Since
+                // floating-point numbers are stored with a normalized
+                // representation, the significand and exponent are
+                // interrelated.
+                //
+                // After extracting the sign, we normalized the
+                // significand as a hexadecimal value, calculating an
+                // exponent adjust for any shifts made during
+                // normalization.  If the significand is zero, the
+                // exponent doesn't need to be examined since the output
+                // will be zero.
+                //
+                // Next the exponent in the input string is extracted.
+                // Afterwards, the significand is normalized as a *binary*
+                // value and the input value's normalized exponent can be
+                // computed.  The significand bits are copied into a
+                // double significand; if the string has more logical bits
+                // than can fit in a double, the extra bits affect the
+                // round and sticky bits which are used to round the final
+                // value.
+                //
+                //  Extract significand sign
+                String group1 = m.group(1);
+                boolean isNegative = ((group1 != null) && group1.equals("-"));
+
+                //  Extract Significand magnitude
+                //
+                // Based on the form of the significand, calculate how the
+                // binary exponent needs to be adjusted to create a
+                // normalized//hexadecimal* floating-point number; that
+                // is, a number where there is one nonzero hex digit to
+                // the left of the (hexa)decimal point.  Since we are
+                // adjusting a binary, not hexadecimal exponent, the
+                // exponent is adjusted by a multiple of 4.
+                //
+                // There are a number of significand scenarios to consider;
+                // letters are used in indicate nonzero digits:
+                //
+                // 1. 000xxxx       =>      x.xxx   normalized
+                //    increase exponent by (number of x's - 1)*4
+                //
+                // 2. 000xxx.yyyy =>        x.xxyyyy        normalized
+                //    increase exponent by (number of x's - 1)*4
+                //
+                // 3. .000yyy  =>   y.yy    normalized
+                //    decrease exponent by (number of zeros + 1)*4
+                //
+                // 4. 000.00000yyy => y.yy normalized
+                //    decrease exponent by (number of zeros to right of point + 1)*4
+                //
+                // If the significand is exactly zero, return a properly
+                // signed zero.
+                //
+
+                String significandString;
+                int signifLength;
+                int exponentAdjust;
+                {
+                    int leftDigits = 0; // number of meaningful digits to
+                    // left of "decimal" point
+                    // (leading zeros stripped)
+                    int rightDigits = 0; // number of digits to right of
+                    // "decimal" point; leading zeros
+                    // must always be accounted for
+                    //
+                    // The significand is made up of either
+                    //
+                    // 1. group 4 entirely (integer portion only)
+                    //
+                    // OR
+                    //
+                    // 2. the fractional portion from group 7 plus any
+                    // (optional) integer portions from group 6.
+                    //
+                    String group4;
+                    if ((group4 = m.group(4)) != null) {  // Integer-only significand
+                        // Leading zeros never matter on the integer portion
+                        significandString = stripLeadingZeros(group4);
+                        leftDigits = significandString.length();
+                    } else {
+                        // Group 6 is the optional integer; leading zeros
+                        // never matter on the integer portion
+                        String group6 = stripLeadingZeros(m.group(6));
+                        leftDigits = group6.length();
+
+                        // fraction
+                        String group7 = m.group(7);
+                        rightDigits = group7.length();
+
+                        // Turn "integer.fraction" into "integer"+"fraction"
+                        significandString =
+                                ((group6 == null) ? "" : group6) + // is the null
+                                        // check necessary?
+                                        group7;
+                    }
+
+                    significandString = stripLeadingZeros(significandString);
+                    signifLength = significandString.length();
+
+                    //
+                    // Adjust exponent as described above
+                    //
+                    if (leftDigits >= 1) {  // Cases 1 and 2
+                        exponentAdjust = 4 * (leftDigits - 1);
+                    } else {                // Cases 3 and 4
+                        exponentAdjust = -4 * (rightDigits - signifLength + 1);
+                    }
+
+                    // If the significand is zero, the exponent doesn't
+                    // matter; return a properly signed zero.
+
+                    if (signifLength == 0) { // Only zeros in input
+                        return isNegative ? A2BC_NEGATIVE_ZERO : A2BC_POSITIVE_ZERO;
+                    }
+                }
+
+                //  Extract Exponent
+                //
+                // Use an int to read in the exponent value; this should
+                // provide more than sufficient range for non-contrived
+                // inputs.  If reading the exponent in as an int does
+                // overflow, examine the sign of the exponent and
+                // significand to determine what to do.
+                //
+                String group8 = m.group(8);
+                boolean positiveExponent = (group8 == null) || group8.equals("+");
+                long unsignedRawExponent;
+                try {
+                    unsignedRawExponent = Integer.parseInt(m.group(9));
+                }
+                catch (NumberFormatException e) {
+                    // At this point, we know the exponent is
+                    // syntactically well-formed as a sequence of
+                    // digits.  Therefore, if an NumberFormatException
+                    // is thrown, it must be due to overflowing int's
+                    // range.  Also, at this point, we have already
+                    // checked for a zero significand.  Thus the signs
+                    // of the exponent and significand determine the
+                    // final result:
+                    //
+                    //                      significand
+                    //                      +               -
+                    // exponent     +       +infinity       -infinity
+                    //              -       +0.0            -0.0
+                    return isNegative ?
+                              (positiveExponent ? A2BC_NEGATIVE_INFINITY : A2BC_NEGATIVE_ZERO)
+                            : (positiveExponent ? A2BC_POSITIVE_INFINITY : A2BC_POSITIVE_ZERO);
+
+                }
+
+                long rawExponent =
+                        (positiveExponent ? 1L : -1L) * // exponent sign
+                                unsignedRawExponent;            // exponent magnitude
+
+                // Calculate partially adjusted exponent
+                long exponent = rawExponent + exponentAdjust;
+
+                // Starting copying non-zero bits into proper position in
+                // a long; copy explicit bit too; this will be masked
+                // later for normal values.
+
+                boolean round = false;
+                boolean sticky = false;
+                int nextShift;
+                long significand = 0L;
+                // First iteration is different, since we only copy
+                // from the leading significand bit; one more exponent
+                // adjust will be needed...
+
+                // IMPORTANT: make leadingDigit a long to avoid
+                // surprising shift semantics!
+                long leadingDigit = getHexDigit(significandString, 0);
+
+                //
+                // Left shift the leading digit (53 - (bit position of
+                // leading 1 in digit)); this sets the top bit of the
+                // significand to 1.  The nextShift value is adjusted
+                // to take into account the number of bit positions of
+                // the leadingDigit actually used.  Finally, the
+                // exponent is adjusted to normalize the significand
+                // as a binary value, not just a hex value.
+                //
+                if (leadingDigit == 1) {
+                    significand |= leadingDigit << 52;
+                    nextShift = 52 - 4;
+                    // exponent += 0
+                } else if (leadingDigit <= 3) { // [2, 3]
+                    significand |= leadingDigit << 51;
+                    nextShift = 52 - 5;
+                    exponent += 1;
+                } else if (leadingDigit <= 7) { // [4, 7]
+                    significand |= leadingDigit << 50;
+                    nextShift = 52 - 6;
+                    exponent += 2;
+                } else if (leadingDigit <= 15) { // [8, f]
+                    significand |= leadingDigit << 49;
+                    nextShift = 52 - 7;
+                    exponent += 3;
+                } else {
+                    throw new AssertionError("Result from digit conversion too large!");
+                }
+                // The preceding if-else could be replaced by a single
+                // code block based on the high-order bit set in
+                // leadingDigit.  Given leadingOnePosition,
+
+                // significand |= leadingDigit << (SIGNIFICAND_WIDTH - leadingOnePosition);
+                // nextShift = 52 - (3 + leadingOnePosition);
+                // exponent += (leadingOnePosition-1);
+
+                //
+                // Now the exponent variable is equal to the normalized
+                // binary exponent.  Code below will make representation
+                // adjustments if the exponent is incremented after
+                // rounding (includes overflows to infinity) or if the
+                // result is subnormal.
+                //
+
+                // Copy digit into significand until the significand can't
+                // hold another full hex digit or there are no more input
+                // hex digits.
+                int i = 0;
+                for (i = 1;
+                     i < signifLength && nextShift >= 0;
+                     i++) {
+                    long currentDigit = getHexDigit(significandString, i);
+                    significand |= (currentDigit << nextShift);
+                    nextShift -= 4;
+                }
+
+                // After the above loop, the bulk of the string is copied.
+                // Now, we must copy any partial hex digits into the
+                // significand AND compute the round bit and start computing
+                // sticky bit.
+
+                if (i < signifLength) { // at least one hex input digit exists
+                    long currentDigit = getHexDigit(significandString, i);
+
+                    // from nextShift, figure out how many bits need
+                    // to be copied, if any
+                    switch (nextShift) { // must be negative
+                        case -1:
+                            // three bits need to be copied in; can
+                            // set round bit
+                            significand |= ((currentDigit & 0xEL) >> 1);
+                            round = (currentDigit & 0x1L) != 0L;
+                            break;
+
+                        case -2:
+                            // two bits need to be copied in; can
+                            // set round and start sticky
+                            significand |= ((currentDigit & 0xCL) >> 2);
+                            round = (currentDigit & 0x2L) != 0L;
+                            sticky = (currentDigit & 0x1L) != 0;
+                            break;
+
+                        case -3:
+                            // one bit needs to be copied in
+                            significand |= ((currentDigit & 0x8L) >> 3);
+                            // Now set round and start sticky, if possible
+                            round = (currentDigit & 0x4L) != 0L;
+                            sticky = (currentDigit & 0x3L) != 0;
+                            break;
+
+                        case -4:
+                            // all bits copied into significand; set
+                            // round and start sticky
+                            round = ((currentDigit & 0x8L) != 0);  // is top bit set?
+                            // nonzeros in three low order bits?
+                            sticky = (currentDigit & 0x7L) != 0;
+                            break;
+
+                        default:
+                            throw new AssertionError("Unexpected shift distance remainder.");
+                            // break;
+                    }
+
+                    // Round is set; sticky might be set.
+
+                    // For the sticky bit, it suffices to check the
+                    // current digit and test for any nonzero digits in
+                    // the remaining unprocessed input.
+                    i++;
+                    while (i < signifLength && !sticky) {
+                        currentDigit = getHexDigit(significandString, i);
+                        sticky = sticky || (currentDigit != 0);
+                        i++;
+                    }
+
+                }
+                // else all of string was seen, round and sticky are
+                // correct as false.
+
+                // Float calculations
+                int floatBits = isNegative ? FloatConsts.SIGN_BIT_MASK : 0;
+                if (exponent >= Float.MIN_EXPONENT) {
+                    if (exponent > Float.MAX_EXPONENT) {
+                        // Float.POSITIVE_INFINITY
+                        floatBits |= FloatConsts.EXP_BIT_MASK;
+                    } else {
+                        int threshShift = DoubleConsts.SIGNIFICAND_WIDTH - FloatConsts.SIGNIFICAND_WIDTH - 1;
+                        boolean floatSticky = (significand & ((1L << threshShift) - 1)) != 0 || round || sticky;
+                        int iValue = (int) (significand >>> threshShift);
+                        if ((iValue & 3) != 1 || floatSticky) {
+                            iValue++;
+                        }
+                        floatBits |= (((((int) exponent) + (FloatConsts.EXP_BIAS - 1))) << SINGLE_EXP_SHIFT) + (iValue >> 1);
+                    }
+                } else {
+                    if (exponent < FloatConsts.MIN_SUB_EXPONENT - 1) {
+                        // 0
+                    } else {
+                        // exponent == -127 ==> threshShift = 53 - 2 + (-149) - (-127) = 53 - 24
+                        int threshShift = (int) ((DoubleConsts.SIGNIFICAND_WIDTH - 2 + FloatConsts.MIN_SUB_EXPONENT) - exponent);
+                        assert threshShift >= DoubleConsts.SIGNIFICAND_WIDTH - FloatConsts.SIGNIFICAND_WIDTH;
+                        assert threshShift < DoubleConsts.SIGNIFICAND_WIDTH;
+                        boolean floatSticky = (significand & ((1L << threshShift) - 1)) != 0 || round || sticky;
+                        int iValue = (int) (significand >>> threshShift);
+                        if ((iValue & 3) != 1 || floatSticky) {
+                            iValue++;
+                        }
+                        floatBits |= iValue >> 1;
+                    }
+                }
+                float fValue = Float.intBitsToFloat(floatBits);
+
+                // Check for overflow and update exponent accordingly.
+                if (exponent > Double.MAX_EXPONENT) {         // Infinite result
+                    // overflow to properly signed infinity
+                    return isNegative ? A2BC_NEGATIVE_INFINITY : A2BC_POSITIVE_INFINITY;
+                } else {  // Finite return value
+                    if (exponent <= Double.MAX_EXPONENT && // (Usually) normal result
+                            exponent >= Double.MIN_EXPONENT) {
+
+                        // The result returned in this block cannot be a
+                        // zero or subnormal; however after the
+                        // significand is adjusted from rounding, we could
+                        // still overflow in infinity.
+
+                        // AND exponent bits into significand; if the
+                        // significand is incremented and overflows from
+                        // rounding, this combination will update the
+                        // exponent correctly, even in the case of
+                        // Double.MAX_VALUE overflowing to infinity.
+
+                        significand = ((( exponent +
+                                (long) DoubleConsts.EXP_BIAS) <<
+                                (DoubleConsts.SIGNIFICAND_WIDTH - 1))
+                                & DoubleConsts.EXP_BIT_MASK) |
+                                (DoubleConsts.SIGNIF_BIT_MASK & significand);
+
+                    } else {  // Subnormal or zero
+                        // (exponent < Double.MIN_EXPONENT)
+
+                        if (exponent < (DoubleConsts.MIN_SUB_EXPONENT - 1)) {
+                            // No way to round back to nonzero value
+                            // regardless of significand if the exponent is
+                            // less than -1075.
+                            return isNegative ? A2BC_NEGATIVE_ZERO : A2BC_POSITIVE_ZERO;
+                        } else { //  -1075 <= exponent <= MIN_EXPONENT -1 = -1023
+                            //
+                            // Find bit position to round to; recompute
+                            // round and sticky bits, and shift
+                            // significand right appropriately.
+                            //
+
+                            sticky = sticky || round;
+                            round = false;
+
+                            // Number of bits of significand to preserve is
+                            // exponent - abs_min_exp +1
+                            // check:
+                            // -1075 +1074 + 1 = 0
+                            // -1023 +1074 + 1 = 52
+
+                            int bitsDiscarded = 53 -
+                                    ((int) exponent - DoubleConsts.MIN_SUB_EXPONENT + 1);
+                            assert bitsDiscarded >= 1 && bitsDiscarded <= 53;
+
+                            // What to do here:
+                            // First, isolate the new round bit
+                            round = (significand & (1L << (bitsDiscarded - 1))) != 0L;
+                            if (bitsDiscarded > 1) {
+                                // create mask to update sticky bits; low
+                                // order bitsDiscarded bits should be 1
+                                long mask = ~((~0L) << (bitsDiscarded - 1));
+                                sticky = sticky || ((significand & mask) != 0L);
+                            }
+
+                            // Now, discard the bits
+                            significand = significand >> bitsDiscarded;
+
+                            significand = ((((long) (Double.MIN_EXPONENT - 1) + // subnorm exp.
+                                    (long) DoubleConsts.EXP_BIAS) <<
+                                    (DoubleConsts.SIGNIFICAND_WIDTH - 1))
+                                    & DoubleConsts.EXP_BIT_MASK) |
+                                    (DoubleConsts.SIGNIF_BIT_MASK & significand);
+                        }
+                    }
+
+                    // The significand variable now contains the currently
+                    // appropriate exponent bits too.
+
+                    //
+                    // Determine if significand should be incremented;
+                    // making this determination depends on the least
+                    // significant bit and the round and sticky bits.
+                    //
+                    // Round to nearest even rounding table, adapted from
+                    // table 4.7 in "Computer Arithmetic" by IsraelKoren.
+                    // The digit to the left of the "decimal" point is the
+                    // least significant bit, the digits to the right of
+                    // the point are the round and sticky bits
+                    //
+                    // Number       Round(x)
+                    // x0.00        x0.
+                    // x0.01        x0.
+                    // x0.10        x0.
+                    // x0.11        x1. = x0. +1
+                    // x1.00        x1.
+                    // x1.01        x1.
+                    // x1.10        x1. + 1
+                    // x1.11        x1. + 1
+                    //
+                    boolean leastZero = ((significand & 1L) == 0L);
+                    if ((leastZero && round && sticky) ||
+                            ((!leastZero) && round)) {
+                        significand++;
+                    }
+
+                    double value = isNegative ?
+                            Double.longBitsToDouble(significand | DoubleConsts.SIGN_BIT_MASK) :
+                            Double.longBitsToDouble(significand );
+
+                    return new PreparedASCIIToBinaryBuffer(value, fValue);
+                }
+            }
+    }
+
+    /**
+     * Returns <code>s</code> with any leading zeros removed.
+     */
+    static String stripLeadingZeros(String s) {
+        if(!s.isEmpty() && s.charAt(0)=='0') {
+            for(int i=1; i<s.length(); i++) {
+                if(s.charAt(i)!='0') {
+                    return s.substring(i);
+                }
+            }
+            return "";
+        }
+        return s;
+    }
+
+    /**
+     * Extracts a hexadecimal digit from position <code>position</code>
+     * of string <code>s</code>.
+     */
+    static int getHexDigit(String s, int position) {
+        int value = Character.digit(s.charAt(position), 16);
+        if (value <= -1 || value >= 16) {
+            throw new AssertionError("Unexpected failure of digit conversion of " +
+                                     s.charAt(position));
+        }
+        return value;
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/math/FormattedFPDecimal.class b/tests/test_data/std/jdk/internal/math/FormattedFPDecimal.class
new file mode 100644
index 0000000000000000000000000000000000000000..9d19e2ff70bd232112d1ebbd6021b75469483f39
GIT binary patch
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/math/FormattedFPDecimal.java b/tests/test_data/std/jdk/internal/math/FormattedFPDecimal.java
new file mode 100644
index 00000000..ce9b2fc4
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/math/FormattedFPDecimal.java
@@ -0,0 +1,320 @@
+/*
+ * Copyright (c) 2023, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package jdk.internal.math;
+
+/*
+ * This class provides support for the 'e', 'f' and 'g' conversions on double
+ * values with sign bit 0.
+ * It is worth noting that float values are converted to double values _before_
+ * control reaches code in this class.
+ *
+ * It delegates the conversion to decimal to class DoubleToDecimal to get
+ * the decimal d selected by Double.toString(double) as a pair of integers
+ * f and e meeting d = f 10^e.
+ * It then rounds d to the appropriate number of digits, as per specification,
+ * and extracts the digits of both the significand and, where required, the
+ * exponent of the rounded value.
+ *
+ * Further processing like padding, sign, grouping, localization, etc., is the
+ * responsibility of the caller.
+ */
+public final class FormattedFPDecimal {
+
+    public static final char SCIENTIFIC = 'e';
+    public static final char PLAIN      = 'f';
+    public static final char GENERAL    = 'g';
+
+    private long f;
+    private int e;  // normalized to 0 when f = 0
+    private int n;
+    private char[] digits;  // ... and often the decimal separator as well
+    private char[] exp;  // [+-][e]ee, that is, sign and minimum 2 digits
+
+    private FormattedFPDecimal() {
+    }
+
+    public static FormattedFPDecimal valueOf(double v, int prec, char form) {
+        FormattedFPDecimal fd = new FormattedFPDecimal();
+        DoubleToDecimal.split(v, fd);
+        return switch (form) {
+            case SCIENTIFIC -> fd.scientific(prec);
+            case PLAIN      -> fd.plain(prec);
+            case GENERAL    -> fd.general(prec);
+            default         -> throw new IllegalArgumentException(
+                    String.format("unsupported form '%c'", form)
+            );
+        };
+    }
+
+    public void set(long f, int e, int n) {
+        /* Initially, n = 0 if f = 0, and 10^{n-1} <= f < 10^n if f != 0 */
+        this.f = f;
+        this.e = e;
+        this.n = n;
+    }
+
+    public char[] getExponent() {
+        return exp;
+    }
+
+    public char[] getMantissa() {
+        return digits;
+    }
+
+    public int getExponentRounded() {
+        return n + e - 1;
+    }
+
+    private FormattedFPDecimal plain(int prec) {
+        /*
+         * Rounding d = f 10^e to prec digits in plain mode means the same
+         * as rounding it to the p = n + e + prec most significand digits of d,
+         * with the understanding that p < 0 cuts off all its digits.
+         */
+        round(n + e + (long) prec);  // n + e is well inside the int range
+        return plainChars();
+    }
+
+    private FormattedFPDecimal plainChars() {
+        if (e >= 0) {
+            plainCharsPureInteger();
+        } else if (n + e > 0) {
+            plainCharsMixed();
+        } else {
+            plainCharsPureFraction();
+        }
+        return this;
+    }
+
+    private void plainCharsPureInteger() {
+        digits = new char[n + e];
+        fillWithZeros(n, n + e);
+        fillWithDigits(f, 0, n);
+    }
+
+    private void plainCharsMixed() {
+        digits = new char[n + 1];
+        long x = fillWithDigits(f, n + 1 + e, n + 1);
+        digits[n + e] = '.';
+        fillWithDigits(x, 0, n + e);
+    }
+
+    private void plainCharsPureFraction() {
+        digits = new char[2 - e];
+        long x = f;
+        fillWithDigits(x, 2 - e - n, 2 - e);
+        fillWithZeros(0, 2 - e - n);
+        digits[1] = '.';
+    }
+
+    private FormattedFPDecimal scientific(int prec) {
+        /*
+         * Rounding d = f 10^e to prec digits in scientific mode means the same
+         * as rounding it to the p = prec + 1 most significand digits of d.
+         */
+        round(prec + 1L);
+        return scientificChars(prec);
+    }
+
+    private FormattedFPDecimal scientificChars(int prec) {
+        if (prec != 0) {
+            scientificCharsWithFraction();
+        } else {
+            scientificCharsNoFraction();
+        }
+        expChars();
+        return this;
+    }
+
+    private void scientificCharsWithFraction() {
+        digits = new char[1 + n];  // room for leading digit and for '.'
+        long x = fillWithDigits(f, 2, 1 + n);
+        digits[1] = '.';
+        digits[0] = toDigit(x);
+    }
+
+    private void scientificCharsNoFraction() {
+        digits = new char[1];
+        digits[0] = toDigit(f);
+    }
+
+    private FormattedFPDecimal general(int prec) {
+        /*
+         * Rounding d = f 10^e to prec digits in general mode means the same
+         * as rounding it to the p = prec most significand digits of d, and then
+         * deciding whether to format it in plain or scientific mode, depending
+         * on the rounded value.
+         */
+        round(prec);
+        int er = getExponentRounded();
+        if (-4 <= er && er < prec) {
+            plainChars();
+        } else {
+            scientificChars(prec - 1);
+        }
+        return this;
+    }
+
+    private void expChars() {
+        int er = getExponentRounded();
+        int aer = Math.abs(er);
+        exp = new char[aer >= 100 ? 4 : 3];
+        int q;
+        if (aer >= 100) {
+            q = aer / 10;
+            exp[3] = toDigit(aer - 10 * q);
+            aer = q;
+        }
+        q = aer / 10;
+        exp[2] = toDigit(aer - 10 * q);
+        exp[1] = toDigit(q);
+        exp[0] = er >= 0 ? '+' : '-';
+    }
+
+    private void round(long pp) {
+        /*
+         * Let d = f 10^e, and let p shorten pp.
+         * This method rounds d to the p most significant digits.
+         * It does so by possibly modifying f, e and n.
+         * When f becomes 0, e and n are normalized to 0 and 1, resp.
+         *
+         * For any real x let
+         *      r(x) = floor(x + 1/2)
+         * which is rounding to the closest integer, with ties rounded toward
+         * positive infinity.
+         *
+         * When f = 0 there's not much to say, except that this holds iff n = 0.
+         *
+         * Otherwise, since
+         *      10^{n-1} <= f < 10^n
+         * it follows that
+         *      10^{e+n-1} <= d < 10^{e+n}
+         * To round d to the most significant p digits, first scale d to the
+         * range [10^{p-1}, 10^p), cutoff the fractional digits by applying r,
+         * and finally scale back.
+         * To this end, first define
+         *      ds = d 10^{p-e-n}
+         * which ensures
+         *      10^{p-1} <= ds < 10^p
+         *
+         * Now, if p < 0 (that is, if p <= -1) then
+         *      ds < 10^p <= 10^{-1} < 1/2
+         * so that
+         *      r(ds) = 0
+         * Thus, rounding d to p < 0 digits leads to 0.
+         */
+        if (n == 0 || pp < 0) {
+            f = 0;
+            e = 0;
+            n = 1;
+            return;
+        }
+
+        /*
+         * Further, if p >= n then
+         *      ds = f 10^e 10^{p-e-n} = f 10^{p-n}
+         * which shows that ds is an integer, so r(ds) = ds. That is,
+         * rounding to p >= n digits leads to a result equal to d.
+         */
+        if (pp >= n) {  // no rounding needed
+            return;
+        }
+
+        /*
+         * Finally, 0 <= p < n. When p = 0 it follows that
+         *      10^{-1} <= ds < 1
+         *      0 <= f' = r(ds) <= 1
+         * that is, f' is either 0 or 1.
+         *
+         * Otherwise
+         *      10^{p-1} <= ds < 10^p
+         *      1 <= 10^{p-1} <= f' = r(ds) <= 10^p
+         * Note that f' = 10^p is a possible outcome.
+         *
+         * Scale back, where e' = e + n - p
+         *      d' = f' 10^{e+n-p} = f' 10^e', with 10^{e+n-1} <= d' <= 10^{e+n}
+         *
+         * Since n > p, f' can be computed in integer arithmetic as follows,
+         * where / denotes division in the real numbers:
+         *      f' = r(ds) = r(f 10^{p-n}) = r(f / 10^{n-p})
+         *          = floor(f / 10^{n-p} + 1/2)
+         *          = floor((f + 10^{n-p}/2) / 10^{n-p})
+         */
+        int p = (int) pp;  // 0 <= pp < n, safe cast
+        e += n - p;  // new e is well inside the int range
+        long pow10 = MathUtils.pow10(n - p);
+        f = (f + (pow10 >> 1)) / pow10;
+        if (p == 0) {
+            n = 1;
+            if (f == 0) {
+                e = 0;
+            }
+            return;
+        }
+
+        n = p;
+        if (f == MathUtils.pow10(p)) {
+            /*
+             * f is n + 1 digits long.
+             * Absorb one trailing zero into e and reduce f accordingly.
+             */
+            f /= 10;
+            e += 1;
+        }
+    }
+
+    /*
+     * Fills the digits section with indices in [from, to) with the lower
+     * to - from digits of x (as chars), while stripping them away from x.
+     * Returns the stripped x.
+     */
+    private long fillWithDigits(long x, int from, int to) {
+        while (to > from) {
+            long q = x / 10;
+            digits[--to] = toDigit(x - q * 10);
+            x = q;
+        }
+        return x;
+    }
+
+    /*
+     * Fills the digits section with indices in [from, to) with '0'.
+     */
+    private void fillWithZeros(int from, int to) {
+        while (to > from) {
+            digits[--to] = '0';
+        }
+    }
+
+    private static char toDigit(long d) {
+        return toDigit((int) d);
+    }
+
+    private static char toDigit(int d) {
+        return (char) (d + '0');
+    }
+
+}
diff --git a/tests/test_data/std/jdk/internal/math/MathUtils.class b/tests/test_data/std/jdk/internal/math/MathUtils.class
new file mode 100644
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HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/math/MathUtils.java b/tests/test_data/std/jdk/internal/math/MathUtils.java
new file mode 100644
index 00000000..3c52a244
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/math/MathUtils.java
@@ -0,0 +1,813 @@
+/*
+ * Copyright (c) 2021, 2022, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package jdk.internal.math;
+
+/**
+ * This class exposes package private utilities for other classes.
+ * Thus, all methods are assumed to be invoked with correct arguments,
+ * so these are not checked at all.
+ */
+final class MathUtils {
+    /*
+     * For full details about this code see the following reference:
+     *
+     *     Giulietti, "The Schubfach way to render doubles",
+     *     https://drive.google.com/file/d/1gp5xv4CAa78SVgCeWfGqqI4FfYYYuNFb
+     */
+
+    /*
+     * The boundaries for k in g0(int) and g1(int).
+     * K_MIN must be DoubleToDecimal.K_MIN or less.
+     * K_MAX must be DoubleToDecimal.K_MAX or more.
+     */
+    static final int K_MIN = -324;
+    static final int K_MAX = 292;
+
+    /* Must be DoubleToDecimal.H or more */
+    static final int H = 17;
+
+    /* C_10 = floor(log10(2) * 2^Q_10), A_10 = floor(log10(3/4) * 2^Q_10) */
+    private static final int Q_10 = 41;
+    private static final long C_10 = 661_971_961_083L;
+    private static final long A_10 = -274_743_187_321L;
+
+    /* C_2 = floor(log2(10) * 2^Q_2) */
+    private static final int Q_2 = 38;
+    private static final long C_2 = 913_124_641_741L;
+
+    private MathUtils() {
+        throw new RuntimeException("not supposed to be instantiated.");
+    }
+
+    /* The first powers of 10. The last entry must be 10^(DoubleToDecimal.H) */
+    private static final long[] pow10 = {
+        1L,
+        10L,
+        100L,
+        1_000L,
+        10_000L,
+        100_000L,
+        1_000_000L,
+        10_000_000L,
+        100_000_000L,
+        1_000_000_000L,
+        10_000_000_000L,
+        100_000_000_000L,
+        1_000_000_000_000L,
+        10_000_000_000_000L,
+        100_000_000_000_000L,
+        1_000_000_000_000_000L,
+        10_000_000_000_000_000L,
+        100_000_000_000_000_000L,
+    };
+
+    /**
+     * Returns 10<sup>{@code e}</sup>.
+     *
+     * @param e The exponent which must meet
+     *          0 &le; {@code e} &le; {@link #H}.
+     * @return 10<sup>{@code e}</sup>.
+     */
+    static long pow10(int e) {
+        return pow10[e];
+    }
+
+    /**
+     * Returns the unique integer <i>k</i> such that
+     * 10<sup><i>k</i></sup> &le; 2<sup>{@code e}</sup>
+     * &lt; 10<sup><i>k</i>+1</sup>.
+     * <p>
+     * The result is correct when |{@code e}| &le; 6_432_162.
+     * Otherwise the result is undefined.
+     *
+     * @param e The exponent of 2, which should meet
+     *          |{@code e}| &le; 6_432_162 for safe results.
+     * @return &lfloor;log<sub>10</sub>2<sup>{@code e}</sup>&rfloor;.
+     */
+    static int flog10pow2(int e) {
+        return (int) (e * C_10 >> Q_10);
+    }
+
+    /**
+     * Returns the unique integer <i>k</i> such that
+     * 10<sup><i>k</i></sup> &le; 3/4 &middot; 2<sup>{@code e}</sup>
+     * &lt; 10<sup><i>k</i>+1</sup>.
+     * <p>
+     * The result is correct when
+     * -3_606_689 &le; {@code e} &le; 3_150_619.
+     * Otherwise the result is undefined.
+     *
+     * @param e The exponent of 2, which should meet
+     *          -3_606_689 &le; {@code e} &le; 3_150_619 for safe results.
+     * @return &lfloor;log<sub>10</sub>(3/4 &middot;
+     * 2<sup>{@code e}</sup>)&rfloor;.
+     */
+    static int flog10threeQuartersPow2(int e) {
+        return (int) (e * C_10 + A_10 >> Q_10);
+    }
+
+    /**
+     * Returns the unique integer <i>k</i> such that
+     * 2<sup><i>k</i></sup> &le; 10<sup>{@code e}</sup>
+     * &lt; 2<sup><i>k</i>+1</sup>.
+     * <p>
+     * The result is correct when |{@code e}| &le; 1_838_394.
+     * Otherwise the result is undefined.
+     *
+     * @param e The exponent of 10, which should meet
+     *          |{@code e}| &le; 1_838_394 for safe results.
+     * @return &lfloor;log<sub>2</sub>10<sup>{@code e}</sup>&rfloor;.
+     */
+    static int flog2pow10(int e) {
+        return (int) (e * C_2 >> Q_2);
+    }
+
+    /**
+     * Let 10<sup>-{@code k}</sup> = <i>&beta;</i> 2<sup><i>r</i></sup>,
+     * for the unique pair of integer <i>r</i> and real <i>&beta;</i> meeting
+     * 2<sup>125</sup> &le; <i>&beta;</i> &lt; 2<sup>126</sup>.
+     * Further, let <i>g</i> = &lfloor;<i>&beta;</i>&rfloor; + 1.
+     * Split <i>g</i> into the higher 63 bits <i>g</i><sub>1</sub> and
+     * the lower 63 bits <i>g</i><sub>0</sub>. Thus,
+     * <i>g</i><sub>1</sub> =
+     * &lfloor;<i>g</i> 2<sup>-63</sup>&rfloor;
+     * and
+     * <i>g</i><sub>0</sub> =
+     * <i>g</i> - <i>g</i><sub>1</sub> 2<sup>63</sup>.
+     * <p>
+     * This method returns <i>g</i><sub>1</sub> while
+     * {@link #g0(int)} returns <i>g</i><sub>0</sub>.
+     * <p>
+     * If needed, the exponent <i>r</i> can be computed as
+     * <i>r</i> = {@code flog2pow10(-k)} - 125 (see {@link #flog2pow10(int)}).
+     *
+     * @param k The exponent of 10, which must meet
+     *          {@link #K_MIN} &le; {@code e} &le; {@link #K_MAX}.
+     * @return <i>g</i><sub>1</sub> as described above.
+     */
+    static long g1(int k) {
+        return g[k - K_MIN << 1];
+    }
+
+    /**
+     * Returns <i>g</i><sub>0</sub> as described in
+     * {@link #g1(int)}.
+     *
+     * @param k The exponent of 10, which must meet
+     *          {@link #K_MIN} &le; {@code e} &le; {@link #K_MAX}.
+     * @return <i>g</i><sub>0</sub> as described in
+     * {@link #g1(int)}.
+     */
+    static long g0(int k) {
+        return g[k - K_MIN << 1 | 1];
+    }
+
+    /*
+     * The precomputed values for g1(int) and g0(int).
+     * The first entry must be for an exponent of K_MIN or less.
+     * The last entry must be for an exponent of K_MAX or more.
+     */
+    private static final long[] g = {
+        0x4F0C_EDC9_5A71_8DD4L, 0x5B01_E8B0_9AA0_D1B5L, // -324
+        0x7E7B_160E_F71C_1621L, 0x119C_A780_F767_B5EEL, // -323
+        0x652F_44D8_C5B0_11B4L, 0x0E16_EC67_2C52_F7F2L, // -322
+        0x50F2_9D7A_37C0_0E29L, 0x5812_56B8_F042_5FF5L, // -321
+        0x40C2_1794_F966_71BAL, 0x79A8_4560_C035_1991L, // -320
+        0x679C_F287_F570_B5F7L, 0x75DA_089A_CD21_C281L, // -319
+        0x52E3_F539_9126_F7F9L, 0x44AE_6D48_A41B_0201L, // -318
+        0x424F_F761_40EB_F994L, 0x36F1_F106_E9AF_34CDL, // -317
+        0x6A19_8BCE_CE46_5C20L, 0x57E9_81A4_A918_547BL, // -316
+        0x54E1_3CA5_71D1_E34DL, 0x2CBA_CE1D_5413_76C9L, // -315
+        0x43E7_63B7_8E41_82A4L, 0x23C8_A4E4_4342_C56EL, // -314
+        0x6CA5_6C58_E39C_043AL, 0x060D_D4A0_6B9E_08B0L, // -313
+        0x56EA_BD13_E949_9CFBL, 0x1E71_76E6_BC7E_6D59L, // -312
+        0x4588_9743_2107_B0C8L, 0x7EC1_2BEB_C9FE_BDE1L, // -311
+        0x6F40_F205_01A5_E7A7L, 0x7E01_DFDF_A997_9635L, // -310
+        0x5900_C19D_9AEB_1FB9L, 0x4B34_B319_5479_44F7L, // -309
+        0x4733_CE17_AF22_7FC7L, 0x55C3_C27A_A9FA_9D93L, // -308
+        0x71EC_7CF2_B1D0_CC72L, 0x5606_03F7_765D_C8EAL, // -307
+        0x5B23_9728_8E40_A38EL, 0x7804_CFF9_2B7E_3A55L, // -306
+        0x48E9_45BA_0B66_E93FL, 0x1337_0CC7_55FE_9511L, // -305
+        0x74A8_6F90_123E_41FEL, 0x51F1_AE0B_BCCA_881BL, // -304
+        0x5D53_8C73_41CB_67FEL, 0x74C1_5809_63D5_39AFL, // -303
+        0x4AA9_3D29_016F_8665L, 0x43CD_E007_8310_FAF3L, // -302
+        0x7775_2EA8_024C_0A3CL, 0x0616_333F_381B_2B1EL, // -301
+        0x5F90_F220_01D6_6E96L, 0x3811_C298_F9AF_55B1L, // -300
+        0x4C73_F4E6_67DE_BEDEL, 0x600E_3547_2E25_DE28L, // -299
+        0x7A53_2170_A631_3164L, 0x3349_EED8_49D6_303FL, // -298
+        0x61DC_1AC0_84F4_2783L, 0x42A1_8BE0_3B11_C033L, // -297
+        0x4E49_AF00_6A5C_EC69L, 0x1BB4_6FE6_95A7_CCF5L, // -296
+        0x7D42_B19A_43C7_E0A8L, 0x2C53_E63D_BC3F_AE55L, // -295
+        0x6435_5AE1_CFD3_1A20L, 0x2376_51CA_FCFF_BEAAL, // -294
+        0x502A_AF1B_0CA8_E1B3L, 0x35F8_416F_30CC_9888L, // -293
+        0x4022_25AF_3D53_E7C2L, 0x5E60_3458_F3D6_E06DL, // -292
+        0x669D_0918_621F_D937L, 0x4A33_86F4_B957_CD7BL, // -291
+        0x5217_3A79_E819_7A92L, 0x6E8F_9F2A_2DDF_D796L, // -290
+        0x41AC_2EC7_ECE1_2EDBL, 0x720C_7F54_F17F_DFABL, // -289
+        0x6913_7E0C_AE35_17C6L, 0x1CE0_CBBB_1BFF_CC45L, // -288
+        0x540F_980A_24F7_4638L, 0x171A_3C95_AFFF_D69EL, // -287
+        0x433F_ACD4_EA5F_6B60L, 0x127B_63AA_F333_1218L, // -286
+        0x6B99_1487_DD65_7899L, 0x6A5F_05DE_51EB_5026L, // -285
+        0x5614_106C_B11D_FA14L, 0x5518_D17E_A7EF_7352L, // -284
+        0x44DC_D9F0_8DB1_94DDL, 0x2A7A_4132_1FF2_C2A8L, // -283
+        0x6E2E_2980_E2B5_BAFBL, 0x5D90_6850_331E_043FL, // -282
+        0x5824_EE00_B55E_2F2FL, 0x6473_86A6_8F4B_3699L, // -281
+        0x4683_F19A_2AB1_BF59L, 0x36C2_D21E_D908_F87BL, // -280
+        0x70D3_1C29_DDE9_3228L, 0x579E_1CFE_280E_5A5DL, // -279
+        0x5A42_7CEE_4B20_F4EDL, 0x2C7E_7D98_200B_7B7EL, // -278
+        0x4835_30BE_A280_C3F1L, 0x09FE_CAE0_19A2_C932L, // -277
+        0x7388_4DFD_D0CE_064EL, 0x4331_4499_C29E_0EB6L, // -276
+        0x5C6D_0B31_73D8_050BL, 0x4F5A_9D47_CEE4_D891L, // -275
+        0x49F0_D5C1_2979_9DA2L, 0x72AE_E439_7250_AD41L, // -274
+        0x764E_22CE_A8C2_95D1L, 0x377E_39F5_83B4_4868L, // -273
+        0x5EA4_E8A5_53CE_DE41L, 0x12CB_6191_3629_D387L, // -272
+        0x4BB7_2084_430B_E500L, 0x756F_8140_F821_7605L, // -271
+        0x7925_00D3_9E79_6E67L, 0x6F18_CECE_59CF_233CL, // -270
+        0x60EA_670F_B1FA_BEB9L, 0x3F47_0BD8_47D8_E8FDL, // -269
+        0x4D88_5272_F4C8_9894L, 0x329F_3CAD_0647_20CAL, // -268
+        0x7C0D_50B7_EE0D_C0EDL, 0x3765_2DE1_A3A5_0143L, // -267
+        0x633D_DA2C_BE71_6724L, 0x2C50_F181_4FB7_3436L, // -266
+        0x4F64_AE8A_31F4_5283L, 0x3D0D_8E01_0C92_902BL, // -265
+        0x7F07_7DA9_E986_EA6BL, 0x7B48_E334_E0EA_8045L, // -264
+        0x659F_97BB_2138_BB89L, 0x4907_1C2A_4D88_669DL, // -263
+        0x514C_7962_80FA_2FA1L, 0x20D2_7CEE_A46D_1EE4L, // -262
+        0x4109_FAB5_33FB_594DL, 0x670E_CA58_838A_7F1DL, // -261
+        0x680F_F788_532B_C216L, 0x0B4A_DD5A_6C10_CB62L, // -260
+        0x533F_F939_DC23_01ABL, 0x22A2_4AAE_BCDA_3C4EL, // -259
+        0x4299_942E_49B5_9AEFL, 0x354E_A225_63E1_C9D8L, // -258
+        0x6A8F_537D_42BC_2B18L, 0x554A_9D08_9FCF_A95AL, // -257
+        0x553F_75FD_CEFC_EF46L, 0x776E_E406_E63F_BAAEL, // -256
+        0x4432_C4CB_0BFD_8C38L, 0x5F8B_E99F_1E99_6225L, // -255
+        0x6D1E_07AB_4662_79F4L, 0x3279_75CB_6428_9D08L, // -254
+        0x574B_3955_D1E8_6190L, 0x2861_2B09_1CED_4A6DL, // -253
+        0x45D5_C777_DB20_4E0DL, 0x06B4_226D_B0BD_D524L, // -252
+        0x6FBC_7259_5E9A_167BL, 0x2453_6A49_1AC9_5506L, // -251
+        0x5963_8EAD_E548_11FCL, 0x1D0F_883A_7BD4_4405L, // -250
+        0x4782_D88B_1DD3_4196L, 0x4A72_D361_FCA9_D004L, // -249
+        0x726A_F411_C952_028AL, 0x43EA_EBCF_FAA9_4CD3L, // -248
+        0x5B88_C341_6DDB_353BL, 0x4FEF_230C_C887_70A9L, // -247
+        0x493A_35CD_F17C_2A96L, 0x0CBF_4F3D_6D39_26EEL, // -246
+        0x7529_EFAF_E8C6_AA89L, 0x6132_1862_485B_717CL, // -245
+        0x5DBB_2626_53D2_2207L, 0x675B_46B5_06AF_8DFDL, // -244
+        0x4AFC_1E85_0FDB_4E6CL, 0x52AF_6BC4_0559_3E64L, // -243
+        0x77F9_CA6E_7FC5_4A47L, 0x377F_12D3_3BC1_FD6DL, // -242
+        0x5FFB_0858_6637_6E9FL, 0x45FF_4242_9634_CABDL, // -241
+        0x4CC8_D379_EB5F_8BB2L, 0x6B32_9B68_782A_3BCBL, // -240
+        0x7ADA_EBF6_4565_AC51L, 0x2B84_2BDA_59DD_2C77L, // -239
+        0x6248_BCC5_0451_56A7L, 0x3C69_BCAE_AE4A_89F9L, // -238
+        0x4EA0_9704_0374_4552L, 0x6387_CA25_583B_A194L, // -237
+        0x7DCD_BE6C_D253_A21EL, 0x05A6_103B_C05F_68EDL, // -236
+        0x64A4_9857_0EA9_4E7EL, 0x37B8_0CFC_99E5_ED8AL, // -235
+        0x5083_AD12_7221_0B98L, 0x2C93_3D96_E184_BE08L, // -234
+        0x4069_5741_F4E7_3C79L, 0x7075_CADF_1AD0_9807L, // -233
+        0x670E_F203_2171_FA5CL, 0x4D89_4498_2AE7_59A4L, // -232
+        0x5272_5B35_B45B_2EB0L, 0x3E07_6A13_5585_E150L, // -231
+        0x41F5_15C4_9048_F226L, 0x64D2_BB42_AAD1_810DL, // -230
+        0x6988_22D4_1A0E_503EL, 0x07B7_9204_4482_6815L, // -229
+        0x546C_E8A9_AE71_D9CBL, 0x1FC6_0E69_D068_5344L, // -228
+        0x438A_53BA_F1F4_AE3CL, 0x196B_3EBB_0D20_429DL, // -227
+        0x6C10_85F7_E987_7D2DL, 0x0F11_FDF8_1500_6A94L, // -226
+        0x5673_9E5F_EE05_FDBDL, 0x58DB_3193_4400_5543L, // -225
+        0x4529_4B7F_F19E_6497L, 0x60AF_5ADC_3666_AA9CL, // -224
+        0x6EA8_78CC_B5CA_3A8CL, 0x344B_C493_8A3D_DDC7L, // -223
+        0x5886_C70A_2B08_2ED6L, 0x5D09_6A0F_A1CB_17D2L, // -222
+        0x46D2_38D4_EF39_BF12L, 0x173A_BB3F_B4A2_7975L, // -221
+        0x7150_5AEE_4B8F_981DL, 0x0B91_2B99_2103_F588L, // -220
+        0x5AA6_AF25_093F_ACE4L, 0x0940_EFAD_B403_2AD3L, // -219
+        0x4885_58EA_6DCC_8A50L, 0x0767_2624_9002_88A9L, // -218
+        0x7408_8E43_E2E0_DD4CL, 0x723E_A36D_B337_410EL, // -217
+        0x5CD3_A503_1BE7_1770L, 0x5B65_4F8A_F5C5_CDA5L, // -216
+        0x4A42_EA68_E31F_45F3L, 0x62B7_72D5_916B_0AEBL, // -215
+        0x76D1_770E_3832_0986L, 0x0458_B7BC_1BDE_77DDL, // -214
+        0x5F0D_F8D8_2CF4_D46BL, 0x1D13_C630_164B_9318L, // -213
+        0x4C0B_2D79_BD90_A9EFL, 0x30DC_9E8C_DEA2_DC13L, // -212
+        0x79AB_7BF5_FC1A_A97FL, 0x0160_FDAE_3104_9351L, // -211
+        0x6155_FCC4_C9AE_EDFFL, 0x1AB3_FE24_F403_A90EL, // -210
+        0x4DDE_63D0_A158_BE65L, 0x6229_981D_9002_EDA5L, // -209
+        0x7C97_061A_9BC1_30A2L, 0x69DC_2695_B337_E2A1L, // -208
+        0x63AC_04E2_1634_26E8L, 0x54B0_1EDE_28F9_821BL, // -207
+        0x4FBC_D0B4_DE90_1F20L, 0x43C0_18B1_BA61_34E2L, // -206
+        0x7F94_8121_6419_CB67L, 0x1F99_C11C_5D68_549DL, // -205
+        0x6610_674D_E9AE_3C52L, 0x4C7B_00E3_7DED_107EL, // -204
+        0x51A6_B90B_2158_3042L, 0x09FC_00B5_FE57_4065L, // -203
+        0x4152_2DA2_8113_59CEL, 0x3B30_0091_9845_CD1DL, // -202
+        0x6883_7C37_34EB_C2E3L, 0x784C_CDB5_C06F_AE95L, // -201
+        0x539C_635F_5D89_68B6L, 0x2D0A_3E2B_0059_5877L, // -200
+        0x42E3_82B2_B13A_BA2BL, 0x3DA1_CB55_99E1_1393L, // -199
+        0x6B05_9DEA_B52A_C378L, 0x629C_7888_F634_EC1EL, // -198
+        0x559E_17EE_F755_692DL, 0x3549_FA07_2B5D_89B1L, // -197
+        0x447E_798B_F911_20F1L, 0x1107_FB38_EF7E_07C1L, // -196
+        0x6D97_28DF_F4E8_34B5L, 0x01A6_5EC1_7F30_0C68L, // -195
+        0x57AC_20B3_2A53_5D5DL, 0x4E1E_B234_65C0_09EDL, // -194
+        0x4623_4D5C_21DC_4AB1L, 0x24E5_5B5D_1E33_3B24L, // -193
+        0x7038_7BC6_9C93_AAB5L, 0x216E_F894_FD1E_C506L, // -192
+        0x59C6_C96B_B076_222AL, 0x4DF2_6077_30E5_6A6CL, // -191
+        0x47D2_3ABC_8D2B_4E88L, 0x3E5B_805F_5A51_21F0L, // -190
+        0x72E9_F794_1512_1740L, 0x63C5_9A32_2A1B_697FL, // -189
+        0x5BEE_5FA9_AA74_DF67L, 0x0304_7B5B_54E2_BACCL, // -188
+        0x498B_7FBA_EEC3_E5ECL, 0x0269_FC49_10B5_623DL, // -187
+        0x75AB_FF91_7E06_3CACL, 0x6A43_2D41_B455_69FBL, // -186
+        0x5E23_32DA_CB38_308AL, 0x21CF_5767_C377_87FCL, // -185
+        0x4B4F_5BE2_3C2C_F3A1L, 0x67D9_12B9_692C_6CCAL, // -184
+        0x787E_F969_F9E1_85CFL, 0x595B_5128_A847_1476L, // -183
+        0x6065_9454_C7E7_9E3FL, 0x6115_DA86_ED05_A9F8L, // -182
+        0x4D1E_1043_D31F_B1CCL, 0x4DAB_1538_BD9E_2193L, // -181
+        0x7B63_4D39_51CC_4FADL, 0x62AB_5527_95C9_CF52L, // -180
+        0x62B5_D761_0E3D_0C8BL, 0x0222_AA86_116E_3F75L, // -179
+        0x4EF7_DF80_D830_D6D5L, 0x4E82_2204_DABE_992AL, // -178
+        0x7E59_659A_F381_57BCL, 0x1736_9CD4_9130_F510L, // -177
+        0x6514_5148_C2CD_DFC9L, 0x5F5E_E3DD_40F3_F740L, // -176
+        0x50DD_0DD3_CF0B_196EL, 0x1918_B64A_9A5C_C5CDL, // -175
+        0x40B0_D7DC_A5A2_7ABEL, 0x4746_F83B_AEB0_9E3EL, // -174
+        0x6781_5961_0903_F797L, 0x253E_59F9_1780_FD2FL, // -173
+        0x52CD_E11A_6D9C_C612L, 0x50FE_AE60_DF9A_6426L, // -172
+        0x423E_4DAE_BE17_04DBL, 0x5A65_584D_7FAE_B685L, // -171
+        0x69FD_4917_968B_3AF9L, 0x10A2_26E2_65E4_573BL, // -170
+        0x54CA_A0DF_ABA2_9594L, 0x0D4E_8581_EB1D_1295L, // -169
+        0x43D5_4D7F_BC82_1143L, 0x243E_D134_BC17_4211L, // -168
+        0x6C88_7BFF_9403_4ED2L, 0x06CA_E854_6025_3682L, // -167
+        0x56D3_9666_1002_A574L, 0x6BD5_86A9_E684_2B9BL, // -166
+        0x4576_11EB_4002_1DF7L, 0x0977_9EEE_5203_5616L, // -165
+        0x6F23_4FDE_CCD0_2FF1L, 0x5BF2_97E3_B66B_BCEFL, // -164
+        0x58E9_0CB2_3D73_598EL, 0x165B_ACB6_2B89_63F3L, // -163
+        0x4720_D6F4_FDF5_E13EL, 0x4516_23C4_EFA1_1CC2L, // -162
+        0x71CE_24BB_2FEF_CECAL, 0x3B56_9FA1_7F68_2E03L, // -161
+        0x5B0B_5095_BFF3_0BD5L, 0x15DE_E61A_CC53_5803L, // -160
+        0x48D5_DA11_665C_0977L, 0x2B18_B815_7042_ACCFL, // -159
+        0x7489_5CE8_A3C6_758BL, 0x5E8D_F355_806A_AE18L, // -158
+        0x5D3A_B0BA_1C9E_C46FL, 0x653E_5C44_66BB_BE7AL, // -157
+        0x4A95_5A2E_7D4B_D059L, 0x3765_169D_1EFC_9861L, // -156
+        0x7755_5D17_2EDF_B3C2L, 0x256E_8A94_FE60_F3CFL, // -155
+        0x5F77_7DAC_257F_C301L, 0x6ABE_D543_FEB3_F63FL, // -154
+        0x4C5F_97BC_EACC_9C01L, 0x3BCB_DDCF_FEF6_5E99L, // -153
+        0x7A32_8C61_77AD_C668L, 0x5FAC_9619_97F0_975BL, // -152
+        0x61C2_09E7_92F1_6B86L, 0x7FBD_44E1_465A_12AFL, // -151
+        0x4E34_D4B9_425A_BC6BL, 0x7FCA_9D81_0514_DBBFL, // -150
+        0x7D21_545B_9D5D_FA46L, 0x32DD_C8CE_6E87_C5FFL, // -149
+        0x641A_A9E2_E44B_2E9EL, 0x5BE4_A0A5_2539_6B32L, // -148
+        0x5015_54B5_836F_587EL, 0x7CB6_E6EA_842D_EF5CL, // -147
+        0x4011_1091_35F2_AD32L, 0x3092_5255_368B_25E3L, // -146
+        0x6681_B41B_8984_4850L, 0x4DB6_EA21_F0DE_A304L, // -145
+        0x5201_5CE2_D469_D373L, 0x57C5_881B_2718_826AL, // -144
+        0x419A_B0B5_76BB_0F8FL, 0x5FD1_39AF_527A_01EFL, // -143
+        0x68F7_8122_5791_B27FL, 0x4C81_F5E5_50C3_364AL, // -142
+        0x53F9_341B_7941_5B99L, 0x239B_2B1D_DA35_C508L, // -141
+        0x432D_C349_2DCD_E2E1L, 0x02E2_88E4_AE91_6A6DL, // -140
+        0x6B7C_6BA8_4949_6B01L, 0x516A_74A1_174F_10AEL, // -139
+        0x55FD_22ED_076D_EF34L, 0x4121_F6E7_45D8_DA25L, // -138
+        0x44CA_8257_3924_BF5DL, 0x1A81_9252_9E47_14EBL, // -137
+        0x6E10_D08B_8EA1_322EL, 0x5D9C_1D50_FD3E_87DDL, // -136
+        0x580D_73A2_D880_F4F2L, 0x17B0_1773_FDCB_9FE4L, // -135
+        0x4671_294F_139A_5D8EL, 0x4626_7929_97D6_1984L, // -134
+        0x70B5_0EE4_EC2A_2F4AL, 0x3D0A_5B75_BFBC_F59FL, // -133
+        0x5A2A_7250_BCEE_8C3BL, 0x4A6E_AF91_6630_C47FL, // -132
+        0x4821_F50D_63F2_09C9L, 0x21F2_260D_EB5A_36CCL, // -131
+        0x7369_8815_6CB6_760EL, 0x6983_7016_455D_247AL, // -130
+        0x5C54_6CDD_F091_F80BL, 0x6E02_C011_D117_5062L, // -129
+        0x49DD_23E4_C074_C66FL, 0x719B_CCDB_0DAC_404EL, // -128
+        0x762E_9FD4_6721_3D7FL, 0x68F9_47C4_E2AD_33B0L, // -127
+        0x5E8B_B310_5280_FDFFL, 0x6D94_396A_4EF0_F627L, // -126
+        0x4BA2_F5A6_A867_3199L, 0x3E10_2DEE_A58D_91B9L, // -125
+        0x7904_BC3D_DA3E_B5C2L, 0x3019_E317_6F48_E927L, // -124
+        0x60D0_9697_E1CB_C49BL, 0x4014_B5AC_5907_20ECL, // -123
+        0x4D73_ABAC_B4A3_03AFL, 0x4CDD_5E23_7A6C_1A57L, // -122
+        0x7BEC_45E1_2104_D2B2L, 0x47C8_969F_2A46_908AL, // -121
+        0x6323_6B1A_80D0_A88EL, 0x6CA0_787F_5505_406FL, // -120
+        0x4F4F_88E2_00A6_ED3FL, 0x0A19_F9FF_7737_66BFL, // -119
+        0x7EE5_A7D0_010B_1531L, 0x5CF6_5CCB_F1F2_3DFEL, // -118
+        0x6584_8640_00D5_AA8EL, 0x172B_7D6F_F4C1_CB32L, // -117
+        0x5136_D1CC_CD77_BBA4L, 0x78EF_978C_C3CE_3C28L, // -116
+        0x40F8_A7D7_0AC6_2FB7L, 0x13F2_DFA3_CFD8_3020L, // -115
+        0x67F4_3FBE_77A3_7F8BL, 0x3984_9906_1959_E699L, // -114
+        0x5329_CC98_5FB5_FFA2L, 0x6136_E0D1_ADE1_8548L, // -113
+        0x4287_D6E0_4C91_994FL, 0x00F8_B3DA_F181_376DL, // -112
+        0x6A72_F166_E0E8_F54BL, 0x1B27_862B_1C01_F247L, // -111
+        0x5528_C11F_1A53_F76FL, 0x2F52_D1BC_1667_F506L, // -110
+        0x4420_9A7F_4843_2C59L, 0x0C42_4163_451F_F738L, // -109
+        0x6D00_F732_0D38_46F4L, 0x7A03_9BD2_0833_2526L, // -108
+        0x5733_F8F4_D760_38C3L, 0x7B36_1641_A028_EA85L, // -107
+        0x45C3_2D90_AC4C_FA36L, 0x2F5E_7834_8020_BB9EL, // -106
+        0x6F9E_AF4D_E07B_29F0L, 0x4BCA_59ED_99CD_F8FCL, // -105
+        0x594B_BF71_8062_87F3L, 0x563B_7B24_7B0B_2D96L, // -104
+        0x476F_CC5A_CD1B_9FF6L, 0x11C9_2F50_626F_57ACL, // -103
+        0x724C_7A2A_E1C5_CCBDL, 0x02DB_7EE7_03E5_5912L, // -102
+        0x5B70_61BB_E7D1_7097L, 0x1BE2_CBEC_031D_E0DCL, // -101
+        0x4926_B496_530D_F3ACL, 0x164F_0989_9C17_E716L, // -100
+        0x750A_BA8A_1E7C_B913L, 0x3D4B_4275_C68C_A4F0L, //  -99
+        0x5DA2_2ED4_E530_940FL, 0x4AA2_9B91_6BA3_B726L, //  -98
+        0x4AE8_2577_1DC0_7672L, 0x6EE8_7C74_561C_9285L, //  -97
+        0x77D9_D58B_62CD_8A51L, 0x3173_FA53_BCFA_8408L, //  -96
+        0x5FE1_77A2_B571_3B74L, 0x278F_FB76_30C8_69A0L, //  -95
+        0x4CB4_5FB5_5DF4_2F90L, 0x1FA6_62C4_F3D3_87B3L, //  -94
+        0x7ABA_32BB_C986_B280L, 0x32A3_D13B_1FB8_D91FL, //  -93
+        0x622E_8EFC_A138_8ECDL, 0x0EE9_742F_4C93_E0E6L, //  -92
+        0x4E8B_A596_E760_723DL, 0x58BA_C359_0A0F_E71EL, //  -91
+        0x7DAC_3C24_A567_1D2FL, 0x412A_D228_1019_71C9L, //  -90
+        0x6489_C9B6_EAB8_E426L, 0x00EF_0E86_7347_8E3BL, //  -89
+        0x506E_3AF8_BBC7_1CEBL, 0x1A58_D86B_8F6C_71C9L, //  -88
+        0x4058_2F2D_6305_B0BCL, 0x1513_E056_0C56_C16EL, //  -87
+        0x66F3_7EAF_04D5_E793L, 0x3B53_0089_AD57_9BE2L, //  -86
+        0x525C_6558_D0AB_1FA9L, 0x15DC_006E_2446_164FL, //  -85
+        0x41E3_8447_0D55_B2EDL, 0x5E49_99F1_B69E_783FL, //  -84
+        0x696C_06D8_1555_EB15L, 0x7D42_8FE9_2430_C065L, //  -83
+        0x5456_6BE0_1111_88DEL, 0x3102_0CBA_835A_3384L, //  -82
+        0x4378_564C_DA74_6D7EL, 0x5A68_0A2E_CF7B_5C69L, //  -81
+        0x6BF3_BD47_C3ED_7BFDL, 0x770C_DD17_B25E_FA42L, //  -80
+        0x565C_976C_9CBD_FCCBL, 0x1270_B0DF_C1E5_9502L, //  -79
+        0x4516_DF8A_16FE_63D5L, 0x5B8D_5A4C_9B1E_10CEL, //  -78
+        0x6E8A_FF43_57FD_6C89L, 0x127B_C3AD_C4FC_E7B0L, //  -77
+        0x586F_329C_4664_56D4L, 0x0EC9_6957_D0CA_52F3L, //  -76
+        0x46BF_5BB0_3850_4576L, 0x3F07_8779_73D5_0F29L, //  -75
+        0x7132_2C4D_26E6_D58AL, 0x31A5_A58F_1FBB_4B75L, //  -74
+        0x5A8E_89D7_5252_446EL, 0x5AEA_EAD8_E62F_6F91L, //  -73
+        0x4872_07DF_750E_9D25L, 0x2F22_557A_51BF_8C74L, //  -72
+        0x73E9_A632_54E4_2EA2L, 0x1836_EF2A_1C65_AD86L, //  -71
+        0x5CBA_EB5B_771C_F21BL, 0x2CF8_BF54_E384_8AD2L, //  -70
+        0x4A2F_22AF_927D_8E7CL, 0x23FA_32AA_4F9D_3BDBL, //  -69
+        0x76B1_D118_EA62_7D93L, 0x5329_EAAA_18FB_92F8L, //  -68
+        0x5EF4_A747_21E8_6476L, 0x0F54_BBBB_472F_A8C6L, //  -67
+        0x4BF6_EC38_E7ED_1D2BL, 0x25DD_62FC_38F2_ED6CL, //  -66
+        0x798B_138E_3FE1_C845L, 0x22FB_D193_8E51_7BDFL, //  -65
+        0x613C_0FA4_FFE7_D36AL, 0x4F2F_DADC_71DA_C97FL, //  -64
+        0x4DC9_A61D_9986_42BBL, 0x58F3_157D_27E2_3ACCL, //  -63
+        0x7C75_D695_C270_6AC5L, 0x74B8_2261_D969_F7ADL, //  -62
+        0x6391_7877_CEC0_556BL, 0x1093_4EB4_ADEE_5FBEL, //  -61
+        0x4FA7_9393_0BCD_1122L, 0x4075_D890_8B25_1965L, //  -60
+        0x7F72_85B8_12E1_B504L, 0x00BC_8DB4_11D4_F56EL, //  -59
+        0x65F5_37C6_7581_5D9CL, 0x66FD_3E29_A7DD_9125L, //  -58
+        0x5190_F96B_9134_4AE3L, 0x6BFD_CB54_864A_DA84L, //  -57
+        0x4140_C789_40F6_A24FL, 0x6FFE_3C43_9EA2_486AL, //  -56
+        0x6867_A5A8_67F1_03B2L, 0x7FFD_2D38_FDD0_73DCL, //  -55
+        0x5386_1E20_5327_3628L, 0x6664_242D_97D9_F64AL, //  -54
+        0x42D1_B1B3_75B8_F820L, 0x51E9_B68A_DFE1_91D5L, //  -53
+        0x6AE9_1C52_55F4_C034L, 0x1CA9_2411_6635_B621L, //  -52
+        0x5587_49DB_77F7_0029L, 0x63BA_8341_1E91_5E81L, //  -51
+        0x446C_3B15_F992_6687L, 0x6962_029A_7EDA_B201L, //  -50
+        0x6D79_F823_28EA_3DA6L, 0x0F03_375D_97C4_5001L, //  -49
+        0x5794_C682_8721_CAEBL, 0x259C_2C4A_DFD0_4001L, //  -48
+        0x4610_9ECE_D281_6F22L, 0x5149_BD08_B30D_0001L, //  -47
+        0x701A_97B1_50CF_1837L, 0x3542_C80D_EB48_0001L, //  -46
+        0x59AE_DFC1_0D72_79C5L, 0x7768_A00B_22A0_0001L, //  -45
+        0x47BF_1967_3DF5_2E37L, 0x7920_8008_E880_0001L, //  -44
+        0x72CB_5BD8_6321_E38CL, 0x5B67_3341_7400_0001L, //  -43
+        0x5BD5_E313_8281_82D6L, 0x7C52_8F67_9000_0001L, //  -42
+        0x4977_E8DC_6867_9BDFL, 0x16A8_72B9_4000_0001L, //  -41
+        0x758C_A7C7_0D72_92FEL, 0x5773_EAC2_0000_0001L, //  -40
+        0x5E0A_1FD2_7128_7598L, 0x45F6_5568_0000_0001L, //  -39
+        0x4B3B_4CA8_5A86_C47AL, 0x04C5_1120_0000_0001L, //  -38
+        0x785E_E10D_5DA4_6D90L, 0x07A1_B500_0000_0001L, //  -37
+        0x604B_E73D_E483_8AD9L, 0x52E7_C400_0000_0001L, //  -36
+        0x4D09_85CB_1D36_08AEL, 0x0F1F_D000_0000_0001L, //  -35
+        0x7B42_6FAB_61F0_0DE3L, 0x31CC_8000_0000_0001L, //  -34
+        0x629B_8C89_1B26_7182L, 0x5B0A_0000_0000_0001L, //  -33
+        0x4EE2_D6D4_15B8_5ACEL, 0x7C08_0000_0000_0001L, //  -32
+        0x7E37_BE20_22C0_914BL, 0x1340_0000_0000_0001L, //  -31
+        0x64F9_64E6_8233_A76FL, 0x2900_0000_0000_0001L, //  -30
+        0x50C7_83EB_9B5C_85F2L, 0x5400_0000_0000_0001L, //  -29
+        0x409F_9CBC_7C4A_04C2L, 0x1000_0000_0000_0001L, //  -28
+        0x6765_C793_FA10_079DL, 0x0000_0000_0000_0001L, //  -27
+        0x52B7_D2DC_C80C_D2E4L, 0x0000_0000_0000_0001L, //  -26
+        0x422C_A8B0_A00A_4250L, 0x0000_0000_0000_0001L, //  -25
+        0x69E1_0DE7_6676_D080L, 0x0000_0000_0000_0001L, //  -24
+        0x54B4_0B1F_852B_DA00L, 0x0000_0000_0000_0001L, //  -23
+        0x43C3_3C19_3756_4800L, 0x0000_0000_0000_0001L, //  -22
+        0x6C6B_935B_8BBD_4000L, 0x0000_0000_0000_0001L, //  -21
+        0x56BC_75E2_D631_0000L, 0x0000_0000_0000_0001L, //  -20
+        0x4563_9182_44F4_0000L, 0x0000_0000_0000_0001L, //  -19
+        0x6F05_B59D_3B20_0000L, 0x0000_0000_0000_0001L, //  -18
+        0x58D1_5E17_6280_0000L, 0x0000_0000_0000_0001L, //  -17
+        0x470D_E4DF_8200_0000L, 0x0000_0000_0000_0001L, //  -16
+        0x71AF_D498_D000_0000L, 0x0000_0000_0000_0001L, //  -15
+        0x5AF3_107A_4000_0000L, 0x0000_0000_0000_0001L, //  -14
+        0x48C2_7395_0000_0000L, 0x0000_0000_0000_0001L, //  -13
+        0x746A_5288_0000_0000L, 0x0000_0000_0000_0001L, //  -12
+        0x5D21_DBA0_0000_0000L, 0x0000_0000_0000_0001L, //  -11
+        0x4A81_7C80_0000_0000L, 0x0000_0000_0000_0001L, //  -10
+        0x7735_9400_0000_0000L, 0x0000_0000_0000_0001L, //   -9
+        0x5F5E_1000_0000_0000L, 0x0000_0000_0000_0001L, //   -8
+        0x4C4B_4000_0000_0000L, 0x0000_0000_0000_0001L, //   -7
+        0x7A12_0000_0000_0000L, 0x0000_0000_0000_0001L, //   -6
+        0x61A8_0000_0000_0000L, 0x0000_0000_0000_0001L, //   -5
+        0x4E20_0000_0000_0000L, 0x0000_0000_0000_0001L, //   -4
+        0x7D00_0000_0000_0000L, 0x0000_0000_0000_0001L, //   -3
+        0x6400_0000_0000_0000L, 0x0000_0000_0000_0001L, //   -2
+        0x5000_0000_0000_0000L, 0x0000_0000_0000_0001L, //   -1
+        0x4000_0000_0000_0000L, 0x0000_0000_0000_0001L, //    0
+        0x6666_6666_6666_6666L, 0x3333_3333_3333_3334L, //    1
+        0x51EB_851E_B851_EB85L, 0x0F5C_28F5_C28F_5C29L, //    2
+        0x4189_374B_C6A7_EF9DL, 0x5916_872B_020C_49BBL, //    3
+        0x68DB_8BAC_710C_B295L, 0x74F0_D844_D013_A92BL, //    4
+        0x53E2_D623_8DA3_C211L, 0x43F3_E037_0CDC_8755L, //    5
+        0x431B_DE82_D7B6_34DAL, 0x698F_E692_70B0_6C44L, //    6
+        0x6B5F_CA6A_F2BD_215EL, 0x0F4C_A41D_811A_46D4L, //    7
+        0x55E6_3B88_C230_E77EL, 0x3F70_834A_CDAE_9F10L, //    8
+        0x44B8_2FA0_9B5A_52CBL, 0x4C5A_02A2_3E25_4C0DL, //    9
+        0x6DF3_7F67_5EF6_EADFL, 0x2D5C_D103_96A2_1347L, //   10
+        0x57F5_FF85_E592_557FL, 0x3DE3_DA69_454E_75D3L, //   11
+        0x465E_6604_B7A8_4465L, 0x7E4F_E1ED_D10B_9175L, //   12
+        0x7097_09A1_25DA_0709L, 0x4A19_697C_81AC_1BEFL, //   13
+        0x5A12_6E1A_84AE_6C07L, 0x54E1_2130_67BC_E326L, //   14
+        0x480E_BE7B_9D58_566CL, 0x43E7_4DC0_52FD_8285L, //   15
+        0x734A_CA5F_6226_F0ADL, 0x530B_AF9A_1E62_6A6DL, //   16
+        0x5C3B_D519_1B52_5A24L, 0x426F_BFAE_7EB5_21F1L, //   17
+        0x49C9_7747_490E_AE83L, 0x4EBF_CC8B_9890_E7F4L, //   18
+        0x760F_253E_DB4A_B0D2L, 0x4ACC_7A78_F41B_0CBAL, //   19
+        0x5E72_8432_4908_8D75L, 0x223D_2EC7_29AF_3D62L, //   20
+        0x4B8E_D028_3A6D_3DF7L, 0x34FD_BF05_BAF2_9781L, //   21
+        0x78E4_8040_5D7B_9658L, 0x54C9_31A2_C4B7_58CFL, //   22
+        0x60B6_CD00_4AC9_4513L, 0x5D6D_C14F_03C5_E0A5L, //   23
+        0x4D5F_0A66_A23A_9DA9L, 0x3124_9AA5_9C9E_4D51L, //   24
+        0x7BCB_43D7_69F7_62A8L, 0x4EA0_F76F_60FD_4882L, //   25
+        0x6309_0312_BB2C_4EEDL, 0x254D_92BF_80CA_A068L, //   26
+        0x4F3A_68DB_C8F0_3F24L, 0x1DD7_A899_33D5_4D20L, //   27
+        0x7EC3_DAF9_4180_6506L, 0x62F2_A75B_8622_1500L, //   28
+        0x6569_7BFA_9ACD_1D9FL, 0x025B_B916_04E8_10CDL, //   29
+        0x5121_2FFB_AF0A_7E18L, 0x6849_60DE_6A53_40A4L, //   30
+        0x40E7_5996_25A1_FE7AL, 0x203A_B3E5_21DC_33B6L, //   31
+        0x67D8_8F56_A29C_CA5DL, 0x19F7_863B_6960_52BDL, //   32
+        0x5313_A5DE_E87D_6EB0L, 0x7B2C_6B62_BAB3_7564L, //   33
+        0x4276_1E4B_ED31_255AL, 0x2F56_BC4E_FBC2_C450L, //   34
+        0x6A56_96DF_E1E8_3BC3L, 0x6557_93B1_92D1_3A1AL, //   35
+        0x5512_124C_B4B9_C969L, 0x3779_42F4_7574_2E7BL, //   36
+        0x440E_750A_2A2E_3ABAL, 0x5F94_3590_5DF6_8B96L, //   37
+        0x6CE3_EE76_A9E3_912AL, 0x65B9_EF4D_6324_1289L, //   38
+        0x571C_BEC5_54B6_0DBBL, 0x6AFB_25D7_8283_4207L, //   39
+        0x45B0_989D_DD5E_7163L, 0x08C8_EB12_CECF_6806L, //   40
+        0x6F80_F42F_C897_1BD1L, 0x5ADB_11B7_B14B_D9A3L, //   41
+        0x5933_F68C_A078_E30EL, 0x157C_0E2C_8DD6_47B5L, //   42
+        0x475C_C53D_4D2D_8271L, 0x5DFC_D823_A4AB_6C91L, //   43
+        0x722E_0862_1515_9D82L, 0x632E_269F_6DDF_141BL, //   44
+        0x5B58_06B4_DDAA_E468L, 0x4F58_1EE5_F17F_4349L, //   45
+        0x4913_3890_B155_8386L, 0x72AC_E584_C132_9C3BL, //   46
+        0x74EB_8DB4_4EEF_38D7L, 0x6AAE_3C07_9B84_2D2AL, //   47
+        0x5D89_3E29_D8BF_60ACL, 0x5558_3006_1603_5755L, //   48
+        0x4AD4_31BB_13CC_4D56L, 0x7779_C004_DE69_12ABL, //   49
+        0x77B9_E92B_52E0_7BBEL, 0x258F_99A1_63DB_5111L, //   50
+        0x5FC7_EDBC_424D_2FCBL, 0x37A6_1481_1CAF_740DL, //   51
+        0x4C9F_F163_683D_BFD5L, 0x7951_AA00_E3BF_900BL, //   52
+        0x7A99_8238_A6C9_32EFL, 0x754F_7667_D2CC_19ABL, //   53
+        0x6214_682D_523A_8F26L, 0x2AA5_F853_0F09_AE22L, //   54
+        0x4E76_B9BD_DB62_0C1EL, 0x5551_9375_A5A1_581BL, //   55
+        0x7D8A_C2C9_5F03_4697L, 0x3BB5_B8BC_3C35_59C5L, //   56
+        0x646F_023A_B269_0545L, 0x7C91_6096_9691_149EL, //   57
+        0x5058_CE95_5B87_376BL, 0x16DA_B3AB_ABA7_43B2L, //   58
+        0x4047_0BAA_AF9F_5F88L, 0x78AE_F622_EFB9_02F5L, //   59
+        0x66D8_12AA_B298_98DBL, 0x0DE4_BD04_B2C1_9E54L, //   60
+        0x5246_7555_5BAD_4715L, 0x57EA_30D0_8F01_4B76L, //   61
+        0x41D1_F777_7C8A_9F44L, 0x4654_F3DA_0C01_092CL, //   62
+        0x694F_F258_C744_3207L, 0x23BB_1FC3_4668_0EACL, //   63
+        0x543F_F513_D29C_F4D2L, 0x4FC8_E635_D1EC_D88AL, //   64
+        0x4366_5DA9_754A_5D75L, 0x263A_51C4_A7F0_AD3BL, //   65
+        0x6BD6_FC42_5543_C8BBL, 0x56C3_B607_731A_AEC4L, //   66
+        0x5645_969B_7769_6D62L, 0x789C_919F_8F48_8BD0L, //   67
+        0x4504_787C_5F87_8AB5L, 0x46E3_A7B2_D906_D640L, //   68
+        0x6E6D_8D93_CC0C_1122L, 0x3E39_0C51_5B3E_239AL, //   69
+        0x5857_A476_3CD6_741BL, 0x4B60_D6A7_7C31_B615L, //   70
+        0x46AC_8391_CA45_29AFL, 0x55E7_121F_968E_2B44L, //   71
+        0x7114_05B6_106E_A919L, 0x0971_B698_F0E3_786DL, //   72
+        0x5A76_6AF8_0D25_5414L, 0x078E_2BAD_8D82_C6BDL, //   73
+        0x485E_BBF9_A41D_DCDCL, 0x6C71_BC8A_D79B_D231L, //   74
+        0x73CA_C65C_39C9_6161L, 0x2D82_C744_8C2C_8382L, //   75
+        0x5CA2_3849_C7D4_4DE7L, 0x3E02_3903_A356_CF9BL, //   76
+        0x4A1B_603B_0643_7185L, 0x7E68_2D9C_82AB_D949L, //   77
+        0x7692_3391_A39F_1C09L, 0x4A40_48FA_6AAC_8EDBL, //   78
+        0x5EDB_5C74_82E5_B007L, 0x5500_3A61_EEF0_7249L, //   79
+        0x4BE2_B05D_3584_8CD2L, 0x7733_61E7_F259_F507L, //   80
+        0x796A_B3C8_55A0_E151L, 0x3EB8_9CA6_508F_EE71L, //   81
+        0x6122_296D_114D_810DL, 0x7EFA_16EB_73A6_585BL, //   82
+        0x4DB4_EDF0_DAA4_673EL, 0x3261_ABEF_8FB8_46AFL, //   83
+        0x7C54_AFE7_C43A_3ECAL, 0x1D69_1318_E5F3_A44BL, //   84
+        0x6376_F31F_D02E_98A1L, 0x6454_0F47_1E5C_836FL, //   85
+        0x4F92_5C19_7358_7A1BL, 0x0376_729F_4B7D_35F3L, //   86
+        0x7F50_935B_EBC0_C35EL, 0x38BD_8432_1261_EFEBL, //   87
+        0x65DA_0F7C_BC9A_35E5L, 0x13CA_D028_0EB4_BFEFL, //   88
+        0x517B_3F96_FD48_2B1DL, 0x5CA2_4020_0BC3_CCBFL, //   89
+        0x412F_6612_6439_BC17L, 0x63B5_0019_A303_0A33L, //   90
+        0x684B_D683_D38F_9359L, 0x1F88_0029_04D1_A9EAL, //   91
+        0x536F_DECF_DC72_DC47L, 0x32D3_3354_03DA_EE55L, //   92
+        0x42BF_E573_16C2_49D2L, 0x5BDC_2910_0315_8B77L, //   93
+        0x6ACC_A251_BE03_A951L, 0x12F9_DB4C_D1BC_1258L, //   94
+        0x5570_81DA_FE69_5440L, 0x7594_AF70_A7C9_A847L, //   95
+        0x445A_017B_FEBA_A9CDL, 0x4476_F2C0_863A_ED06L, //   96
+        0x6D5C_CF2C_CAC4_42E2L, 0x3A57_EACD_A391_7B3CL, //   97
+        0x577D_728A_3BD0_3581L, 0x7B79_88A4_82DA_C8FDL, //   98
+        0x45FD_F53B_630C_F79BL, 0x15FA_D3B6_CF15_6D97L, //   99
+        0x6FFC_BB92_3814_BF5EL, 0x565E_1F8A_E4EF_15BEL, //  100
+        0x5996_FC74_F9AA_32B2L, 0x11E4_E608_B725_AAFFL, //  101
+        0x47AB_FD2A_6154_F55BL, 0x27EA_51A0_9284_88CCL, //  102
+        0x72AC_C843_CEEE_555EL, 0x7310_829A_8407_4146L, //  103
+        0x5BBD_6D03_0BF1_DDE5L, 0x4273_9BAE_D005_CDD2L, //  104
+        0x4964_5735_A327_E4B7L, 0x4EC2_E2F2_4004_A4A8L, //  105
+        0x756D_5855_D1D9_6DF2L, 0x4AD1_6B1D_333A_A10CL, //  106
+        0x5DF1_1377_DB14_57F5L, 0x2241_227D_C295_4DA3L, //  107
+        0x4B27_42C6_48DD_132AL, 0x4E9A_81FE_3544_3E1CL, //  108
+        0x783E_D13D_4161_B844L, 0x175D_9CC9_EED3_9694L, //  109
+        0x6032_40FD_CDE7_C69CL, 0x7917_B0A1_8BDC_7876L, //  110
+        0x4CF5_00CB_0B1F_D217L, 0x1412_F3B4_6FE3_9392L, //  111
+        0x7B21_9ADE_7832_E9BEL, 0x5351_85ED_7FD2_85B6L, //  112
+        0x6281_48B1_F9C2_5498L, 0x42A7_9E57_9975_37C5L, //  113
+        0x4ECD_D3C1_949B_76E0L, 0x3552_E512_E12A_9304L, //  114
+        0x7E16_1F9C_20F8_BE33L, 0x6EEB_081E_3510_EB39L, //  115
+        0x64DE_7FB0_1A60_9829L, 0x3F22_6CE4_F740_BC2EL, //  116
+        0x50B1_FFC0_151A_1354L, 0x3281_F0B7_2C33_C9BEL, //  117
+        0x408E_6633_4414_DC43L, 0x4201_8D5F_568F_D498L, //  118
+        0x674A_3D1E_D354_939FL, 0x1CCF_4898_8A7F_BA8DL, //  119
+        0x52A1_CA7F_0F76_DC7FL, 0x30A5_D3AD_3B99_620BL, //  120
+        0x421B_0865_A5F8_B065L, 0x73B7_DC8A_9614_4E6FL, //  121
+        0x69C4_DA3C_3CC1_1A3CL, 0x52BF_C744_2353_B0B1L, //  122
+        0x549D_7B63_63CD_AE96L, 0x7566_3903_4F76_26F4L, //  123
+        0x43B1_2F82_B63E_2545L, 0x4451_C735_D92B_525DL, //  124
+        0x6C4E_B26A_BD30_3BA2L, 0x3A1C_71EF_C1DE_EA2EL, //  125
+        0x56A5_5B88_9759_C94EL, 0x61B0_5B26_34B2_54F2L, //  126
+        0x4551_1606_DF7B_0772L, 0x1AF3_7C1E_908E_AA5BL, //  127
+        0x6EE8_233E_325E_7250L, 0x2B1F_2CFD_B417_76F8L, //  128
+        0x58B9_B5CB_5B7E_C1D9L, 0x6F4C_23FE_29AC_5F2DL, //  129
+        0x46FA_F7D5_E2CB_CE47L, 0x72A3_4FFE_87BD_18F1L, //  130
+        0x7191_8C89_6ADF_B073L, 0x0438_7FFD_A5FB_5B1BL, //  131
+        0x5ADA_D6D4_557F_C05CL, 0x0360_6664_84C9_15AFL, //  132
+        0x48AF_1243_7799_66B0L, 0x02B3_851D_3707_448CL, //  133
+        0x744B_506B_F28F_0AB3L, 0x1DEC_082E_BE72_0746L, //  134
+        0x5D09_0D23_2872_6EF5L, 0x64BC_D358_985B_3905L, //  135
+        0x4A6D_A41C_205B_8BF7L, 0x6A30_A913_AD15_C738L, //  136
+        0x7715_D360_33C5_ACBFL, 0x5D1A_A81F_7B56_0B8CL, //  137
+        0x5F44_A919_C304_8A32L, 0x7DAE_ECE5_FC44_D609L, //  138
+        0x4C36_EDAE_359D_3B5BL, 0x7E25_8A51_969D_7808L, //  139
+        0x79F1_7C49_EF61_F893L, 0x16A2_76E8_F0FB_F33FL, //  140
+        0x618D_FD07_F2B4_C6DCL, 0x121B_9253_F3FC_C299L, //  141
+        0x4E0B_30D3_2890_9F16L, 0x41AF_A843_2997_0214L, //  142
+        0x7CDE_B485_0DB4_31BDL, 0x4F7F_739E_A8F1_9CEDL, //  143
+        0x63E5_5D37_3E29_C164L, 0x3F99_294B_BA5A_E3F1L, //  144
+        0x4FEA_B0F8_FE87_CDE9L, 0x7FAD_BAA2_FB7B_E98DL, //  145
+        0x7FDD_E7F4_CA72_E30FL, 0x7F7C_5DD1_925F_DC15L, //  146
+        0x664B_1FF7_085B_E8D9L, 0x4C63_7E41_41E6_49ABL, //  147
+        0x51D5_B32C_06AF_ED7AL, 0x704F_9834_34B8_3AEFL, //  148
+        0x4177_C289_9EF3_2462L, 0x26A6_135C_F6F9_C8BFL, //  149
+        0x68BF_9DA8_FE51_D3D0L, 0x3DD6_8561_8B29_4132L, //  150
+        0x53CC_7E20_CB74_A973L, 0x4B12_044E_08ED_CDC2L, //  151
+        0x4309_FE80_A2C3_BAC2L, 0x6F41_9D0B_3A57_D7CEL, //  152
+        0x6B43_30CD_D139_2AD1L, 0x3202_94DE_C3BF_BFB0L, //  153
+        0x55CF_5A3E_40FA_88A7L, 0x419B_AA4B_CFCC_995AL, //  154
+        0x44A5_E1CB_672E_D3B9L, 0x1AE2_EEA3_0CA3_ADE1L, //  155
+        0x6DD6_3612_3EB1_52C1L, 0x77D1_7DD1_ADD2_AFCFL, //  156
+        0x57DE_91A8_3227_7567L, 0x7974_64A7_BE42_263FL, //  157
+        0x464B_A7B9_C1B9_2AB9L, 0x4790_5086_31CE_84FFL, //  158
+        0x7079_0C5C_6928_445CL, 0x0C1A_1A70_4FB0_D4CCL, //  159
+        0x59FA_7049_EDB9_D049L, 0x567B_4859_D95A_43D6L, //  160
+        0x47FB_8D07_F161_736EL, 0x11FC_39E1_7AAE_9CABL, //  161
+        0x732C_14D9_8235_857DL, 0x032D_2968_C44A_9445L, //  162
+        0x5C23_43E1_34F7_9DFDL, 0x4F57_5453_D03B_A9D1L, //  163
+        0x49B5_CFE7_5D92_E4CAL, 0x72AC_4376_402F_BB0EL, //  164
+        0x75EF_B30B_C8EB_07ABL, 0x0446_D256_CD19_2B49L, //  165
+        0x5E59_5C09_6D88_D2EFL, 0x1D05_7512_3DAD_BC3AL, //  166
+        0x4B7A_B007_8AD3_DBF2L, 0x4A6A_C40E_97BE_302FL, //  167
+        0x78C4_4CD8_DE1F_C650L, 0x7711_39B0_F2C9_E6B1L, //  168
+        0x609D_0A47_1819_6B73L, 0x78DA_948D_8F07_EBC1L, //  169
+        0x4D4A_6E9F_467A_BC5CL, 0x60AE_DD3E_0C06_5634L, //  170
+        0x7BAA_4A98_70C4_6094L, 0x344A_FB96_79A3_BD20L, //  171
+        0x62EE_A213_8D69_E6DDL, 0x103B_FC78_614F_CA80L, //  172
+        0x4F25_4E76_0ABB_1F17L, 0x2696_6393_810C_A200L, //  173
+        0x7EA2_1723_445E_9825L, 0x2423_D285_9B47_6999L, //  174
+        0x654E_78E9_037E_E01DL, 0x69B6_4204_7C39_2148L, //  175
+        0x510B_93ED_9C65_8017L, 0x6E2B_6803_9694_1AA0L, //  176
+        0x40D6_0FF1_49EA_CCDFL, 0x71BC_5336_1210_154DL, //  177
+        0x67BC_E64E_DCAA_E166L, 0x1C60_8523_5019_BBAEL, //  178
+        0x52FD_850B_E3BB_E784L, 0x7D1A_041C_4014_9625L, //  179
+        0x4264_6A6F_E963_1F9DL, 0x4A7B_367D_0010_781DL, //  180
+        0x6A3A_43E6_4238_3295L, 0x5D91_F0C8_001A_59C8L, //  181
+        0x54FB_6985_01C6_8EDEL, 0x17A7_F3D3_3348_47D4L, //  182
+        0x43FC_546A_67D2_0BE4L, 0x7953_2975_C2A0_3976L, //  183
+        0x6CC6_ED77_0C83_463BL, 0x0EEB_7589_3766_C256L, //  184
+        0x5705_8AC5_A39C_382FL, 0x2589_2AD4_2C52_3512L, //  185
+        0x459E_089E_1C7C_F9BFL, 0x37A0_EF10_2374_F742L, //  186
+        0x6F63_40FC_FA61_8F98L, 0x5901_7E80_38BB_2536L, //  187
+        0x591C_33FD_951A_D946L, 0x7A67_9866_93C8_EA91L, //  188
+        0x4749_C331_4415_7A9FL, 0x151F_AD1E_DCA0_BBA8L, //  189
+        0x720F_9EB5_39BB_F765L, 0x0832_AE97_C767_92A5L, //  190
+        0x5B3F_B22A_9496_5F84L, 0x068E_F213_05EC_7551L, //  191
+        0x48FF_C1BB_AA11_E603L, 0x1ED8_C1A8_D189_F774L, //  192
+        0x74CC_692C_434F_D66BL, 0x4AF4_690E_1C0F_F253L, //  193
+        0x5D70_5423_690C_AB89L, 0x225D_20D8_1673_2843L, //  194
+        0x4AC0_434F_873D_5607L, 0x3517_4D79_AB8F_5369L, //  195
+        0x779A_054C_0B95_5672L, 0x21BE_E25C_45B2_1F0EL, //  196
+        0x5FAE_6AA3_3C77_785BL, 0x3498_B516_9E28_18D8L, //  197
+        0x4C8B_8882_96C5_F9E2L, 0x5D46_F745_4B53_4713L, //  198
+        0x7A78_DA6A_8AD6_5C9DL, 0x7BA4_BED5_4552_0B52L, //  199
+        0x61FA_4855_3BDE_B07EL, 0x2FB6_FF11_0441_A2A8L, //  200
+        0x4E61_D377_6318_8D31L, 0x72F8_CC0D_9D01_4EEDL, //  201
+        0x7D69_5258_9E8D_AEB6L, 0x1E5A_E015_C802_17E1L, //  202
+        0x6454_41E0_7ED7_BEF8L, 0x1848_B344_A001_ACB4L, //  203
+        0x5043_67E6_CBDF_CBF9L, 0x603A_2903_B334_8A2AL, //  204
+        0x4035_ECB8_A319_6FFBL, 0x002E_8736_28F6_D4EEL, //  205
+        0x66BC_ADF4_3828_B32BL, 0x19E4_0B89_DB24_87E3L, //  206
+        0x5230_8B29_C686_F5BCL, 0x14B6_6FA1_7C1D_3983L, //  207
+        0x41C0_6F54_9ED2_5E30L, 0x1091_F2E7_967D_C79CL, //  208
+        0x6933_E554_3150_96B3L, 0x341C_B7D8_F0C9_3F5FL, //  209
+        0x5429_8443_5AA6_DEF5L, 0x767D_5FE0_C0A0_FF80L, //  210
+        0x4354_69CF_7BB8_B25EL, 0x2B97_7FE7_0080_CC66L, //  211
+        0x6BBA_42E5_92C1_1D63L, 0x5F58_CCA4_CD9A_E0A3L, //  212
+        0x562E_9BEA_DBCD_B11CL, 0x4C47_0A1D_7148_B3B6L, //  213
+        0x44F2_1655_7CA4_8DB0L, 0x3D05_A1B1_276D_5C92L, //  214
+        0x6E50_23BB_FAA0_E2B3L, 0x7B3C_35E8_3F15_60E9L, //  215
+        0x5840_1C96_621A_4EF6L, 0x2F63_5E53_65AA_B3EDL, //  216
+        0x4699_B078_4E7B_725EL, 0x591C_4B75_EAEE_F658L, //  217
+        0x70F5_E726_E3F8_B6FDL, 0x74FA_1256_44B1_8A26L, //  218
+        0x5A5E_5285_832D_5F31L, 0x43FB_41DE_9D5A_D4EBL, //  219
+        0x484B_7537_9C24_4C27L, 0x4FFC_34B2_177B_DD89L, //  220
+        0x73AB_EEBF_603A_1372L, 0x4CC6_BAB6_8BF9_6274L, //  221
+        0x5C89_8BCC_4CFB_42C2L, 0x0A38_955E_D661_1B90L, //  222
+        0x4A07_A309_D72F_689BL, 0x21C6_DDE5_784D_AFA7L, //  223
+        0x7672_9E76_2518_A75EL, 0x693E_2FD5_8D49_190BL, //  224
+        0x5EC2_185E_8413_B918L, 0x5431_BFDE_0AA0_E0D5L, //  225
+        0x4BCE_79E5_3676_2DADL, 0x29C1_664B_3BB3_E711L, //  226
+        0x794A_5CA1_F0BD_15E2L, 0x0F9B_D6DE_C5EC_A4E8L, //  227
+        0x6108_4A1B_26FD_AB1BL, 0x2616_457F_04BD_50BAL, //  228
+        0x4DA0_3B48_EBFE_227CL, 0x1E78_3798_D097_73C8L, //  229
+        0x7C33_920E_4663_6A60L, 0x30C0_58F4_80F2_52D9L, //  230
+        0x635C_74D8_384F_884DL, 0x0D66_AD90_6728_4247L, //  231
+        0x4F7D_2A46_9372_D370L, 0x711E_F140_5286_9B6CL, //  232
+        0x7F2E_AA0A_8584_8581L, 0x34FE_4ECD_50D7_5F14L, //  233
+        0x65BE_EE6E_D136_D134L, 0x2A65_0BD7_73DF_7F43L, //  234
+        0x5165_8B8B_DA92_40F6L, 0x551D_A312_C319_329CL, //  235
+        0x411E_093C_AEDB_672BL, 0x5DB1_4F42_35AD_C217L, //  236
+        0x6830_0EC7_7E2B_D845L, 0x7C4E_E536_BC49_368AL, //  237
+        0x5359_A56C_64EF_E037L, 0x7D0B_EA92_303A_9208L, //  238
+        0x42AE_1DF0_50BF_E693L, 0x173C_BBA8_2695_41A0L, //  239
+        0x6AB0_2FE6_E799_70EBL, 0x3EC7_92A6_A422_029AL, //  240
+        0x5559_BFEB_EC7A_C0BCL, 0x3239_421E_E9B4_CEE1L, //  241
+        0x4447_CCBC_BD2F_0096L, 0x5B61_01B2_5490_A581L, //  242
+        0x6D3F_ADFA_C84B_3424L, 0x2BCE_691D_541A_A268L, //  243
+        0x5766_24C8_A03C_29B6L, 0x563E_BA7D_DCE2_1B87L, //  244
+        0x45EB_50A0_8030_215EL, 0x7832_2ECB_171B_4939L, //  245
+        0x6FDE_E767_3380_3564L, 0x59E9_E478_24F8_7527L, //  246
+        0x597F_1F85_C2CC_F783L, 0x6187_E9F9_B72D_2A86L, //  247
+        0x4798_E604_9BD7_2C69L, 0x346C_BB2E_2C24_2205L, //  248
+        0x728E_3CD4_2C8B_7A42L, 0x20AD_F849_E039_D007L, //  249
+        0x5BA4_FD76_8A09_2E9BL, 0x33BE_603B_19C7_D99FL, //  250
+        0x4950_CAC5_3B3A_8BAFL, 0x42FE_B362_7B06_47B3L, //  251
+        0x754E_113B_91F7_45E5L, 0x5197_856A_5E70_72B8L, //  252
+        0x5DD8_0DC9_4192_9E51L, 0x27AC_6ABB_7EC0_5BC6L, //  253
+        0x4B13_3E3A_9ADB_B1DAL, 0x52F0_5562_CBCD_1638L, //  254
+        0x781E_C9F7_5E2C_4FC4L, 0x1E4D_556A_DFAE_89F3L, //  255
+        0x6018_A192_B1BD_0C9CL, 0x7EA4_4455_7FBE_D4C3L, //  256
+        0x4CE0_8142_27CA_707DL, 0x4BB6_9D11_32FF_109CL, //  257
+        0x7B00_CED0_3FAA_4D95L, 0x5F8A_94E8_5198_1A93L, //  258
+        0x6267_0BD9_CC88_3E11L, 0x32D5_43ED_0E13_4875L, //  259
+        0x4EB8_D647_D6D3_64DAL, 0x5BDD_CFF0_D80F_6D2BL, //  260
+        0x7DF4_8A0C_8AEB_D491L, 0x12FC_7FE7_C018_AEABL, //  261
+        0x64C3_A1A3_A256_43A7L, 0x28C9_FFEC_99AD_5889L, //  262
+        0x509C_814F_B511_CFB9L, 0x0707_FFF0_7AF1_13A1L, //  263
+        0x407D_343F_C40E_3FC7L, 0x1F39_998D_2F27_42E7L, //  264
+        0x672E_B9FF_A016_CC71L, 0x7EC2_8F48_4B72_04A4L, //  265
+        0x528B_C7FF_B345_705BL, 0x189B_A5D3_6F8E_6A1DL, //  266
+        0x4209_6CCC_8F6A_C048L, 0x7A16_1E42_BFA5_21B1L, //  267
+        0x69A8_AE14_18AA_CD41L, 0x4356_96D1_32A1_CF81L, //  268
+        0x5486_F1A9_AD55_7101L, 0x1C45_4574_2881_72CEL, //  269
+        0x439F_27BA_F111_2734L, 0x169D_D129_BA01_28A5L, //  270
+        0x6C31_D92B_1B4E_A520L, 0x242F_B50F_9001_DAA1L, //  271
+        0x568E_4755_AF72_1DB3L, 0x368C_90D9_4001_7BB4L, //  272
+        0x453E_9F77_BF8E_7E29L, 0x120A_0D7A_999A_C95DL, //  273
+        0x6ECA_98BF_98E3_FD0EL, 0x5010_1590_F5C4_7561L, //  274
+        0x58A2_13CC_7A4F_FDA5L, 0x2673_4473_F7D0_5DE8L, //  275
+        0x46E8_0FD6_C83F_FE1DL, 0x6B8F_69F6_5FD9_E4B9L, //  276
+        0x7173_4C8A_D9FF_FCFCL, 0x45B2_4323_CC8F_D45CL, //  277
+        0x5AC2_A3A2_47FF_FD96L, 0x6AF5_0283_0A0C_A9E3L, //  278
+        0x489B_B61B_6CCC_CADFL, 0x08C4_0202_6E70_87E9L, //  279
+        0x742C_5692_47AE_1164L, 0x746C_D003_E3E7_3FDBL, //  280
+        0x5CF0_4541_D2F1_A783L, 0x76BD_7336_4FEC_3315L, //  281
+        0x4A59_D101_758E_1F9CL, 0x5EFD_F5C5_0CBC_F5ABL, //  282
+        0x76F6_1B35_88E3_65C7L, 0x4B2F_EFA1_ADFB_22ABL, //  283
+        0x5F2B_48F7_A0B5_EB06L, 0x08F3_261A_F195_B555L, //  284
+        0x4C22_A0C6_1A2B_226BL, 0x20C2_84E2_5ADE_2AABL, //  285
+        0x79D1_013C_F6AB_6A45L, 0x1AD0_D49D_5E30_4444L, //  286
+        0x6174_00FD_9222_BB6AL, 0x48A7_107D_E4F3_69D0L, //  287
+        0x4DF6_6731_41B5_62BBL, 0x53B8_D9FE_50C2_BB0DL, //  288
+        0x7CBD_71E8_6922_3792L, 0x52C1_5CCA_1AD1_2B48L, //  289
+        0x63CA_C186_BA81_C60EL, 0x7567_7D6E_7BDA_8906L, //  290
+        0x4FD5_679E_FB9B_04D8L, 0x5DEC_6458_6315_3A6CL, //  291
+        0x7FBB_D8FE_5F5E_6E27L, 0x497A_3A27_04EE_C3DFL, //  292
+    };
+
+}
diff --git a/tests/test_data/std/jdk/internal/misc/Blocker.class b/tests/test_data/std/jdk/internal/misc/Blocker.class
new file mode 100644
index 0000000000000000000000000000000000000000..297f11d8209e8553a51633cd8476cdf0e26ab77d
GIT binary patch
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diff --git a/tests/test_data/std/jdk/internal/misc/Blocker.java b/tests/test_data/std/jdk/internal/misc/Blocker.java
new file mode 100644
index 00000000..d41ae737
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/misc/Blocker.java
@@ -0,0 +1,94 @@
+/*
+ * Copyright (c) 2019, 2024, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package jdk.internal.misc;
+
+import jdk.internal.access.JavaLangAccess;
+import jdk.internal.access.SharedSecrets;
+
+/**
+ * Defines static methods to mark the beginning and end of a possibly blocking
+ * operation. The methods are intended to be used with try-finally as follows:
+ * {@snippet lang=java :
+ *     boolean attempted = Blocker.begin();
+ *     try {
+ *         // blocking operation
+ *     } finally {
+ *         Blocker.end(attempted);
+ *     }
+ * }
+ * If invoked from a virtual thread and the underlying carrier thread is a
+ * CarrierThread then the code in the block runs as if it were in run in
+ * ForkJoinPool.ManagedBlocker. This means the pool can be expanded to support
+ * additional parallelism during the blocking operation.
+ */
+public class Blocker {
+    private static final JavaLangAccess JLA;
+    static {
+        JLA = SharedSecrets.getJavaLangAccess();
+        if (JLA == null) {
+            throw new InternalError("JavaLangAccess not setup");
+        }
+    }
+
+    private Blocker() { }
+
+    private static Thread currentCarrierThread() {
+        return JLA.currentCarrierThread();
+    }
+
+    /**
+     * Marks the beginning of a blocking operation.
+     * @return true if tryCompensate attempted
+     */
+    public static boolean begin() {
+        if (VM.isBooted()
+                && Thread.currentThread().isVirtual()
+                && currentCarrierThread() instanceof CarrierThread ct) {
+            return ct.beginBlocking();
+        }
+        return false;
+    }
+
+    /**
+     * Marks the beginning of a possibly blocking operation.
+     * @param blocking true if the operation may block, otherwise false
+     * @return true if tryCompensate attempted
+     */
+    public static boolean begin(boolean blocking) {
+        return (blocking) ? begin() : false;
+    }
+
+    /**
+     * Marks the end of an operation that may have blocked.
+     * @param attempted if tryCompensate attempted
+     */
+    public static void end(boolean attempted) {
+        if (attempted) {
+            CarrierThread ct = (CarrierThread) currentCarrierThread();
+            ct.endBlocking();
+        }
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/misc/CDS.class b/tests/test_data/std/jdk/internal/misc/CDS.class
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HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/misc/CDS.java b/tests/test_data/std/jdk/internal/misc/CDS.java
new file mode 100644
index 00000000..ddb25cb7
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/misc/CDS.java
@@ -0,0 +1,339 @@
+/*
+ * Copyright (c) 2020, 2024, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package jdk.internal.misc;
+
+import java.io.BufferedReader;
+import java.io.File;
+import java.io.InputStreamReader;
+import java.io.InputStream;
+import java.io.IOException;
+import java.io.PrintStream;
+import java.util.Arrays;
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Map;
+import java.util.Objects;
+import java.util.stream.Stream;
+
+import jdk.internal.access.SharedSecrets;
+
+public class CDS {
+    // Must be in sync with cdsConfig.hpp
+    private static final int IS_DUMPING_ARCHIVE              = 1 << 0;
+    private static final int IS_DUMPING_STATIC_ARCHIVE       = 1 << 1;
+    private static final int IS_LOGGING_LAMBDA_FORM_INVOKERS = 1 << 2;
+    private static final int IS_USING_ARCHIVE                = 1 << 3;
+    private static final int configStatus = getCDSConfigStatus();
+
+    /**
+     * Should we log the use of lambda form invokers?
+     */
+    public static boolean isLoggingLambdaFormInvokers() {
+        return (configStatus & IS_LOGGING_LAMBDA_FORM_INVOKERS) != 0;
+    }
+
+    /**
+      * Is the VM writing to a (static or dynamic) CDS archive.
+      */
+    public static boolean isDumpingArchive() {
+        return (configStatus & IS_DUMPING_ARCHIVE) != 0;
+    }
+
+    /**
+      * Is the VM using at least one CDS archive?
+      */
+    public static boolean isUsingArchive() {
+        return (configStatus & IS_USING_ARCHIVE) != 0;
+    }
+
+    /**
+      * Is dumping static archive.
+      */
+    public static boolean isDumpingStaticArchive() {
+        return (configStatus & IS_DUMPING_STATIC_ARCHIVE) != 0;
+    }
+
+    private static native int getCDSConfigStatus();
+    private static native void logLambdaFormInvoker(String line);
+
+    /**
+     * Initialize archived static fields in the given Class using archived
+     * values from CDS dump time. Also initialize the classes of objects in
+     * the archived graph referenced by those fields.
+     *
+     * Those static fields remain as uninitialized if there is no mapped CDS
+     * java heap data or there is any error during initialization of the
+     * object class in the archived graph.
+     */
+    public static native void initializeFromArchive(Class<?> c);
+
+    /**
+     * Ensure that the native representation of all archived java.lang.Module objects
+     * are properly restored.
+     */
+    public static native void defineArchivedModules(ClassLoader platformLoader, ClassLoader systemLoader);
+
+    /**
+     * Returns a predictable "random" seed derived from the VM's build ID and version,
+     * to be used by java.util.ImmutableCollections to ensure that archived
+     * ImmutableCollections are always sorted the same order for the same VM build.
+     */
+    public static native long getRandomSeedForDumping();
+
+    /**
+     * log lambda form invoker holder, name and method type
+     */
+    public static void logLambdaFormInvoker(String prefix, String holder, String name, String type) {
+        if (isLoggingLambdaFormInvokers()) {
+            logLambdaFormInvoker(prefix + " " + holder + " " + name + " " + type);
+        }
+    }
+
+    /**
+      * log species
+      */
+    public static void logSpeciesType(String prefix, String cn) {
+        if (isLoggingLambdaFormInvokers()) {
+            logLambdaFormInvoker(prefix + " " + cn);
+        }
+    }
+
+    static final String DIRECT_HOLDER_CLASS_NAME  = "java.lang.invoke.DirectMethodHandle$Holder";
+    static final String DELEGATING_HOLDER_CLASS_NAME = "java.lang.invoke.DelegatingMethodHandle$Holder";
+    static final String BASIC_FORMS_HOLDER_CLASS_NAME = "java.lang.invoke.LambdaForm$Holder";
+    static final String INVOKERS_HOLDER_CLASS_NAME = "java.lang.invoke.Invokers$Holder";
+
+    private static boolean isValidHolderName(String name) {
+        return name.equals(DIRECT_HOLDER_CLASS_NAME)      ||
+               name.equals(DELEGATING_HOLDER_CLASS_NAME)  ||
+               name.equals(BASIC_FORMS_HOLDER_CLASS_NAME) ||
+               name.equals(INVOKERS_HOLDER_CLASS_NAME);
+    }
+
+    private static boolean isBasicTypeChar(char c) {
+         return "LIJFDV".indexOf(c) >= 0;
+    }
+
+    private static boolean isValidMethodType(String type) {
+        String[] typeParts = type.split("_");
+        // check return type (second part)
+        if (typeParts.length != 2 || typeParts[1].length() != 1
+                || !isBasicTypeChar(typeParts[1].charAt(0))) {
+            return false;
+        }
+        // first part
+        if (!isBasicTypeChar(typeParts[0].charAt(0))) {
+            return false;
+        }
+        for (int i = 1; i < typeParts[0].length(); i++) {
+            char c = typeParts[0].charAt(i);
+            if (!isBasicTypeChar(c)) {
+                if (!(c >= '0' && c <= '9')) {
+                    return false;
+                }
+            }
+        }
+        return true;
+    }
+
+    // Throw exception on invalid input
+    private static void validateInputLines(String[] lines) {
+        for (String s: lines) {
+            if (!s.startsWith("[LF_RESOLVE]") && !s.startsWith("[SPECIES_RESOLVE]")) {
+                throw new IllegalArgumentException("Wrong prefix: " + s);
+            }
+
+            String[] parts = s.split(" ");
+            boolean isLF = s.startsWith("[LF_RESOLVE]");
+
+            if (isLF) {
+                if (parts.length != 4) {
+                    throw new IllegalArgumentException("Incorrect number of items in the line: " + parts.length);
+                }
+                if (!isValidHolderName(parts[1])) {
+                    throw new IllegalArgumentException("Invalid holder class name: " + parts[1]);
+                }
+                if (!isValidMethodType(parts[3])) {
+                    throw new IllegalArgumentException("Invalid method type: " + parts[3]);
+                }
+            } else {
+                if (parts.length != 2) {
+                   throw new IllegalArgumentException("Incorrect number of items in the line: " + parts.length);
+                }
+           }
+      }
+    }
+
+    /**
+     * called from vm to generate MethodHandle holder classes
+     * @return {@code Object[]} if holder classes can be generated.
+     * @param lines in format of LF_RESOLVE or SPECIES_RESOLVE output
+     */
+    private static Object[] generateLambdaFormHolderClasses(String[] lines) {
+        Objects.requireNonNull(lines);
+        validateInputLines(lines);
+        Stream<String> lineStream = Arrays.stream(lines);
+        Map<String, byte[]> result = SharedSecrets.getJavaLangInvokeAccess().generateHolderClasses(lineStream);
+        int size = result.size();
+        Object[] retArray = new Object[size * 2];
+        int index = 0;
+        for (Map.Entry<String, byte[]> entry : result.entrySet()) {
+            retArray[index++] = entry.getKey();
+            retArray[index++] = entry.getValue();
+        };
+        return retArray;
+    }
+
+    private static native void dumpClassList(String listFileName);
+    private static native void dumpDynamicArchive(String archiveFileName);
+
+    private static String drainOutput(InputStream stream, long pid, String tail, List<String> cmds) {
+        String fileName  = "java_pid" + pid + "_" + tail;
+        new Thread( ()-> {
+            try (InputStreamReader isr = new InputStreamReader(stream);
+                 BufferedReader rdr = new BufferedReader(isr);
+                 PrintStream prt = new PrintStream(fileName)) {
+                prt.println("Command:");
+                for (String s : cmds) {
+                    prt.print(s + " ");
+                }
+                prt.println("");
+                String line;
+                while((line = rdr.readLine()) != null) {
+                    prt.println(line);
+                }
+            } catch (IOException e) {
+                throw new RuntimeException("IOException happens during drain stream to file " +
+                                           fileName + ": " + e.getMessage());
+            }}).start();
+        return fileName;
+    }
+
+    private static String[] excludeFlags = {
+         "-XX:DumpLoadedClassList=",
+         "-XX:+RecordDynamicDumpInfo",
+         "-Xshare:",
+         "-XX:SharedClassListFile=",
+         "-XX:SharedArchiveFile=",
+         "-XX:ArchiveClassesAtExit="};
+    private static boolean containsExcludedFlags(String testStr) {
+       for (String e : excludeFlags) {
+           if (testStr.contains(e)) {
+               return true;
+           }
+       }
+       return false;
+    }
+
+    /**
+    * called from jcmd VM.cds to dump static or dynamic shared archive
+    * @param isStatic true for dump static archive or false for dynnamic archive.
+    * @param fileName user input archive name, can be null.
+    * @return The archive name if successfully dumped.
+    */
+    private static String dumpSharedArchive(boolean isStatic, String fileName) throws Exception {
+        String cwd = new File("").getAbsolutePath(); // current dir used for printing message.
+        String currentPid = String.valueOf(ProcessHandle.current().pid());
+        String archiveFileName =  fileName != null ? fileName :
+            "java_pid" + currentPid + (isStatic ? "_static.jsa" : "_dynamic.jsa");
+
+        String tempArchiveFileName = archiveFileName + ".temp";
+        File tempArchiveFile = new File(tempArchiveFileName);
+        // The operation below may cause exception if the file or its dir is protected.
+        if (!tempArchiveFile.exists()) {
+            tempArchiveFile.createNewFile();
+        }
+        tempArchiveFile.delete();
+
+        if (isStatic) {
+            String listFileName = archiveFileName + ".classlist";
+            File listFile = new File(listFileName);
+            if (listFile.exists()) {
+                listFile.delete();
+            }
+            dumpClassList(listFileName);
+            String jdkHome = System.getProperty("java.home");
+            String classPath = System.getProperty("java.class.path");
+            List<String> cmds = new ArrayList<String>();
+            cmds.add(jdkHome + File.separator + "bin" + File.separator + "java"); // java
+            cmds.add("-cp");
+            cmds.add(classPath);
+            cmds.add("-Xlog:cds");
+            cmds.add("-Xshare:dump");
+            cmds.add("-XX:SharedClassListFile=" + listFileName);
+            cmds.add("-XX:SharedArchiveFile=" + tempArchiveFileName);
+
+            // All runtime args.
+            String[] vmArgs = VM.getRuntimeArguments();
+            if (vmArgs != null) {
+                for (String arg : vmArgs) {
+                    if (arg != null && !containsExcludedFlags(arg)) {
+                        cmds.add(arg);
+                    }
+                }
+            }
+
+            Process proc = Runtime.getRuntime().exec(cmds.toArray(new String[0]));
+
+            // Drain stdout/stderr to files in new threads.
+            String stdOutFileName = drainOutput(proc.getInputStream(), proc.pid(), "stdout", cmds);
+            String stdErrFileName = drainOutput(proc.getErrorStream(), proc.pid(), "stderr", cmds);
+
+            proc.waitFor();
+            // done, delete classlist file.
+            listFile.delete();
+
+            // Check if archive has been successfully dumped. We won't reach here if exception happens.
+            // Throw exception if file is not created.
+            if (!tempArchiveFile.exists()) {
+                throw new RuntimeException("Archive file " + tempArchiveFileName +
+                                           " is not created, please check stdout file " +
+                                            cwd + File.separator + stdOutFileName + " or stderr file " +
+                                            cwd + File.separator + stdErrFileName + " for more detail");
+            }
+        } else {
+            dumpDynamicArchive(tempArchiveFileName);
+            if (!tempArchiveFile.exists()) {
+                throw new RuntimeException("Archive file " + tempArchiveFileName +
+                                           " is not created, please check current working directory " +
+                                           cwd  + " for process " +
+                                           currentPid + " output for more detail");
+            }
+        }
+        // Override the existing archive file
+        File archiveFile = new File(archiveFileName);
+        if (archiveFile.exists()) {
+            archiveFile.delete();
+        }
+        if (!tempArchiveFile.renameTo(archiveFile)) {
+            throw new RuntimeException("Cannot rename temp file " + tempArchiveFileName + " to archive file" + archiveFileName);
+        }
+        // Everything goes well, print out the file name.
+        String archiveFilePath = new File(archiveFileName).getAbsolutePath();
+        System.out.println("The process was attached by jcmd and dumped a " + (isStatic ? "static" : "dynamic") + " archive " + archiveFilePath);
+        return archiveFilePath;
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/misc/CarrierThread$1.class b/tests/test_data/std/jdk/internal/misc/CarrierThread$1.class
new file mode 100644
index 0000000000000000000000000000000000000000..8f1ad64b9c29e3288223730e7369097d1b300560
GIT binary patch
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/misc/CarrierThread$ForkJoinPools.class b/tests/test_data/std/jdk/internal/misc/CarrierThread$ForkJoinPools.class
new file mode 100644
index 0000000000000000000000000000000000000000..79a6b36a2829bf031c1b974155ca2913ce579f7e
GIT binary patch
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/misc/CarrierThread.class b/tests/test_data/std/jdk/internal/misc/CarrierThread.class
new file mode 100644
index 0000000000000000000000000000000000000000..cf934c7a2cc19d1f09eb5782925bfdc5f0cac8d0
GIT binary patch
literal 4253
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/misc/CarrierThread.java b/tests/test_data/std/jdk/internal/misc/CarrierThread.java
new file mode 100644
index 00000000..d20b402f
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/misc/CarrierThread.java
@@ -0,0 +1,169 @@
+/*
+ * Copyright (c) 2021, 2024, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package jdk.internal.misc;
+
+import java.security.AccessControlContext;
+import java.security.AccessController;
+import java.security.PrivilegedAction;
+import java.security.ProtectionDomain;
+import java.util.concurrent.ForkJoinPool;
+import java.util.concurrent.ForkJoinWorkerThread;
+import jdk.internal.access.JavaLangAccess;
+import jdk.internal.access.JavaUtilConcurrentFJPAccess;
+import jdk.internal.access.SharedSecrets;
+import jdk.internal.vm.Continuation;
+
+/**
+ * A ForkJoinWorkerThread that can be used as a carrier thread.
+ */
+public class CarrierThread extends ForkJoinWorkerThread {
+    private static final JavaLangAccess JLA = SharedSecrets.getJavaLangAccess();
+    private static final Unsafe U = Unsafe.getUnsafe();
+
+    private static final ThreadGroup CARRIER_THREADGROUP = carrierThreadGroup();
+    @SuppressWarnings("removal")
+    private static final AccessControlContext INNOCUOUS_ACC = innocuousACC();
+
+    private static final long CONTEXTCLASSLOADER;
+    private static final long INHERITABLETHREADLOCALS;
+    private static final long INHERITEDACCESSCONTROLCONTEXT;
+
+    // compensating state
+    private static final int NOT_COMPENSATING = 0;
+    private static final int COMPENSATE_IN_PROGRESS = 1;
+    private static final int COMPENSATING = 2;
+    private int compensating;
+
+    // FJP value to adjust release counts
+    private long compensateValue;
+
+    @SuppressWarnings("this-escape")
+    public CarrierThread(ForkJoinPool pool) {
+        super(CARRIER_THREADGROUP, pool, true);
+        U.putReference(this, CONTEXTCLASSLOADER, ClassLoader.getSystemClassLoader());
+        U.putReference(this, INHERITABLETHREADLOCALS, null);
+        U.putReferenceRelease(this, INHERITEDACCESSCONTROLCONTEXT, INNOCUOUS_ACC);
+    }
+
+    /**
+     * Mark the start of a blocking operation.
+     */
+    public boolean beginBlocking() {
+        assert Thread.currentThread().isVirtual() && JLA.currentCarrierThread() == this;
+        assert compensating == NOT_COMPENSATING || compensating == COMPENSATING;
+
+        if (compensating == NOT_COMPENSATING) {
+            // don't preempt when attempting to compensate
+            Continuation.pin();
+            try {
+                compensating = COMPENSATE_IN_PROGRESS;
+
+                // Uses FJP.tryCompensate to start or re-activate a spare thread
+                compensateValue = ForkJoinPools.beginCompensatedBlock(getPool());
+                compensating = COMPENSATING;
+                return true;
+            } catch (Throwable e) {
+                // exception starting spare thread
+                compensating = NOT_COMPENSATING;
+                throw e;
+            } finally {
+                Continuation.unpin();
+            }
+        } else {
+            return false;
+        }
+    }
+
+    /**
+     * Mark the end of a blocking operation.
+     */
+    public void endBlocking() {
+        assert Thread.currentThread() == this || JLA.currentCarrierThread() == this;
+        if (compensating == COMPENSATING) {
+            ForkJoinPools.endCompensatedBlock(getPool(), compensateValue);
+            compensating = NOT_COMPENSATING;
+            compensateValue = 0;
+        }
+    }
+
+    @Override
+    public void setUncaughtExceptionHandler(UncaughtExceptionHandler ueh) { }
+
+    @Override
+    public void setContextClassLoader(ClassLoader cl) {
+        throw new SecurityException("setContextClassLoader");
+    }
+
+    /**
+     * The thread group for the carrier threads.
+     */
+    @SuppressWarnings("removal")
+    private static ThreadGroup carrierThreadGroup() {
+        return AccessController.doPrivileged(new PrivilegedAction<ThreadGroup>() {
+            public ThreadGroup run() {
+                ThreadGroup group = JLA.currentCarrierThread().getThreadGroup();
+                for (ThreadGroup p; (p = group.getParent()) != null; )
+                    group = p;
+                var carrierThreadsGroup = new ThreadGroup(group, "CarrierThreads");
+                return carrierThreadsGroup;
+            }
+        });
+    }
+
+    /**
+     * Return an AccessControlContext that doesn't support any permissions.
+     */
+    @SuppressWarnings("removal")
+    private static AccessControlContext innocuousACC() {
+        return new AccessControlContext(new ProtectionDomain[] {
+                new ProtectionDomain(null, null)
+        });
+    }
+
+    /**
+     * Defines static methods to invoke non-public ForkJoinPool methods via the
+     * shared secret support.
+     */
+    private static class ForkJoinPools {
+        private static final JavaUtilConcurrentFJPAccess FJP_ACCESS =
+                SharedSecrets.getJavaUtilConcurrentFJPAccess();
+        static long beginCompensatedBlock(ForkJoinPool pool) {
+            return FJP_ACCESS.beginCompensatedBlock(pool);
+        }
+        static void endCompensatedBlock(ForkJoinPool pool, long post) {
+            FJP_ACCESS.endCompensatedBlock(pool, post);
+        }
+    }
+
+    static {
+        CONTEXTCLASSLOADER = U.objectFieldOffset(Thread.class,
+                "contextClassLoader");
+        INHERITABLETHREADLOCALS = U.objectFieldOffset(Thread.class,
+                "inheritableThreadLocals");
+        INHERITEDACCESSCONTROLCONTEXT = U.objectFieldOffset(Thread.class,
+                "inheritedAccessControlContext");
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/misc/CarrierThreadLocal.class b/tests/test_data/std/jdk/internal/misc/CarrierThreadLocal.class
new file mode 100644
index 0000000000000000000000000000000000000000..20298494e6be4b5c72269464f16f708391eae82d
GIT binary patch
literal 1626
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zM>L{v`&<>y_zHdP0@pNrrqs<`?P3}|Om(7|8~kao$$E^<nEj3%70Re$uV3J13LS^l
zml1TtpexGh>6U72fRC_+C&VfDJ9o-d>+UJ<T1L0Id)Cg+0Xba(&1gL~H<2N`lc=kM
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C5NWvp

literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/misc/CarrierThreadLocal.java b/tests/test_data/std/jdk/internal/misc/CarrierThreadLocal.java
new file mode 100644
index 00000000..b14ecaff
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/misc/CarrierThreadLocal.java
@@ -0,0 +1,57 @@
+/*
+ * Copyright (c) 2022, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package jdk.internal.misc;
+
+import jdk.internal.access.JavaLangAccess;
+import jdk.internal.access.SharedSecrets;
+
+/**
+ * A {@link ThreadLocal} variant which binds its value to current thread's
+ * carrier thread.
+ */
+public class CarrierThreadLocal<T> extends ThreadLocal<T> {
+
+    @Override
+    public T get() {
+        return JLA.getCarrierThreadLocal(this);
+    }
+
+    @Override
+    public void set(T value) {
+        JLA.setCarrierThreadLocal(this, value);
+    }
+
+    @Override
+    public void remove() {
+        JLA.removeCarrierThreadLocal(this);
+    }
+
+    public boolean isPresent() {
+        return JLA.isCarrierThreadLocalPresent(this);
+    }
+
+    private static final JavaLangAccess JLA = SharedSecrets.getJavaLangAccess();
+}
diff --git a/tests/test_data/std/jdk/internal/misc/ExtendedMapMode.class b/tests/test_data/std/jdk/internal/misc/ExtendedMapMode.class
new file mode 100644
index 0000000000000000000000000000000000000000..3853e1b194bea6c43b95a837c28c5a68096b7a60
GIT binary patch
literal 2777
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zTE^1sWg=`iYeuGM_$yBJp=MVtBb!1yk_u8P4nq~_-B((mEyNJW4#a@VzH8dc*}-th
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z!*QB1YTBkhCU7!tMgu21IG;i{dK8?L3a13RnxLhnRYUg$S_TH^6`T>c6zm;jbqc*W
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z48OtAca#7WzD<r$rp)gSj=){6j3J3}R5<IVc9Or3FdxXL@fhE7eSv>%5Dyh<C*=Jf
zotNP#aSsi>!HF0ANCeOn<##TCl%`Pt-{E_pD<w0AQqovC%AaKV^cFtZ!iDFYh#0^%
z{K%D7u1(U)pBktBOUtG0<8N^pm>$}~&|erSyu{7)7hCwUIGjFx^)<eF1@SwMOiKo6
z-qCmI`&)SU3e)MCV4QssSk}ka!6Xlnlw79kz*V}MAw47L!3|n@ixM|+iI?1U+~yT`
zC-7^CI&C<EMf^;i4w7;n8WDRKkTC`#K@CZy&fO~iBoCpy!I>mfL87W)GD%;aaGJm}
dRw6-%YbMrUV}mPc?w!U{Y!YyUFPdL*>VKea_c8zg

literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/misc/ExtendedMapMode.java b/tests/test_data/std/jdk/internal/misc/ExtendedMapMode.java
new file mode 100644
index 00000000..f2852f56
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/misc/ExtendedMapMode.java
@@ -0,0 +1,68 @@
+/*
+ * Copyright (c) 2019, 2021, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package jdk.internal.misc;
+
+import java.lang.invoke.MethodHandle;
+import java.lang.invoke.MethodHandles;
+import java.lang.invoke.MethodHandles.Lookup;
+import java.lang.invoke.MethodType;
+import java.nio.channels.FileChannel.MapMode;
+import java.security.AccessController;
+import java.security.PrivilegedExceptionAction;
+
+/**
+ * JDK-specific map modes implemented in java.base.
+ */
+public class ExtendedMapMode {
+
+    static final MethodHandle MAP_MODE_CONSTRUCTOR;
+    static {
+        try {
+            PrivilegedExceptionAction<Lookup> pae = () ->
+                MethodHandles.privateLookupIn(MapMode.class, MethodHandles.lookup());
+            @SuppressWarnings("removal")
+            Lookup lookup = AccessController.doPrivileged(pae);
+            var methodType = MethodType.methodType(void.class, String.class);
+            MAP_MODE_CONSTRUCTOR = lookup.findConstructor(MapMode.class, methodType);
+        } catch (Exception e) {
+            throw new InternalError(e);
+        }
+    }
+
+    public static final MapMode READ_ONLY_SYNC = newMapMode("READ_ONLY_SYNC");
+
+    public static final MapMode READ_WRITE_SYNC = newMapMode("READ_WRITE_SYNC");
+
+    private static MapMode newMapMode(String name) {
+        try {
+            return (MapMode) MAP_MODE_CONSTRUCTOR.invoke(name);
+        } catch (Throwable e) {
+            throw new InternalError(e);
+        }
+    }
+
+    private ExtendedMapMode() { }
+}
diff --git a/tests/test_data/std/jdk/internal/misc/FileSystemOption.class b/tests/test_data/std/jdk/internal/misc/FileSystemOption.class
new file mode 100644
index 0000000000000000000000000000000000000000..b899e125710627f2f3eb4a2ad7905ed0a735d622
GIT binary patch
literal 2567
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aW#W&(#3B8L=wFbY-wL(K5sp#y`2PcZ(Jw0i

literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/misc/FileSystemOption.java b/tests/test_data/std/jdk/internal/misc/FileSystemOption.java
new file mode 100644
index 00000000..5a55b7df
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/misc/FileSystemOption.java
@@ -0,0 +1,90 @@
+/*
+ * Copyright (c) 2018, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package jdk.internal.misc;
+
+import sun.nio.fs.ExtendedOptions;
+
+import java.nio.file.CopyOption;
+import java.nio.file.OpenOption;
+import java.nio.file.WatchEvent;
+
+/**
+ * Internal file system options for jdk.unsupported com.sun.nio.file API use.
+ */
+public final class FileSystemOption<T> {
+    public static final FileSystemOption<Void> INTERRUPTIBLE =
+        new FileSystemOption<>(ExtendedOptions.INTERRUPTIBLE);
+    public static final FileSystemOption<Void> NOSHARE_READ =
+        new FileSystemOption<>(ExtendedOptions.NOSHARE_READ);
+    public static final FileSystemOption<Void> NOSHARE_WRITE =
+        new FileSystemOption<>(ExtendedOptions.NOSHARE_WRITE);
+    public static final FileSystemOption<Void> NOSHARE_DELETE =
+        new FileSystemOption<>(ExtendedOptions.NOSHARE_DELETE);
+    public static final FileSystemOption<Void> FILE_TREE =
+        new FileSystemOption<>(ExtendedOptions.FILE_TREE);
+    public static final FileSystemOption<Void> DIRECT =
+        new FileSystemOption<>(ExtendedOptions.DIRECT);
+    public static final FileSystemOption<Integer> SENSITIVITY_HIGH =
+        new FileSystemOption<>(ExtendedOptions.SENSITIVITY_HIGH);
+    public static final FileSystemOption<Integer> SENSITIVITY_MEDIUM =
+        new FileSystemOption<>(ExtendedOptions.SENSITIVITY_MEDIUM);
+    public static final FileSystemOption<Integer> SENSITIVITY_LOW =
+        new FileSystemOption<>(ExtendedOptions.SENSITIVITY_LOW);
+
+    private final ExtendedOptions.InternalOption<T> internalOption;
+    private FileSystemOption(ExtendedOptions.InternalOption<T> option) {
+        this.internalOption = option;
+    }
+
+    /**
+     * Register this internal option as an OpenOption.
+     */
+    public void register(OpenOption option) {
+        internalOption.register(option);
+    }
+
+    /**
+     * Register this internal option as a CopyOption.
+     */
+    public void register(CopyOption option) {
+        internalOption.register(option);
+    }
+
+    /**
+     * Register this internal option as a WatchEvent.Modifier.
+     */
+    public void register(WatchEvent.Modifier option) {
+        internalOption.register(option);
+    }
+
+    /**
+     * Register this internal option as a WatchEvent.Modifier with the
+     * given parameter.
+     */
+    public void register(WatchEvent.Modifier option, T param) {
+        internalOption.register(option, param);
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/misc/InnocuousThread$1.class b/tests/test_data/std/jdk/internal/misc/InnocuousThread$1.class
new file mode 100644
index 0000000000000000000000000000000000000000..f77fa364bf957029a4177ca655788ab1731c5419
GIT binary patch
literal 1252
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/misc/InnocuousThread$2.class b/tests/test_data/std/jdk/internal/misc/InnocuousThread$2.class
new file mode 100644
index 0000000000000000000000000000000000000000..18cf75e43571c9e1fb2e5f2d52aeea40a21b2b26
GIT binary patch
literal 1160
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/misc/InnocuousThread$3.class b/tests/test_data/std/jdk/internal/misc/InnocuousThread$3.class
new file mode 100644
index 0000000000000000000000000000000000000000..73a8f3a477968adcdee329ace8927f58fcc29e47
GIT binary patch
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/misc/InnocuousThread$4.class b/tests/test_data/std/jdk/internal/misc/InnocuousThread$4.class
new file mode 100644
index 0000000000000000000000000000000000000000..522f40746d562212a62cbcff7620ea9c8e654e40
GIT binary patch
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/misc/InnocuousThread.class b/tests/test_data/std/jdk/internal/misc/InnocuousThread.class
new file mode 100644
index 0000000000000000000000000000000000000000..ffbcd67a70c5ea1858a7dd3d7b10641b4a7a62e7
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HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/misc/InnocuousThread.java b/tests/test_data/std/jdk/internal/misc/InnocuousThread.java
new file mode 100644
index 00000000..f8db0bc1
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/misc/InnocuousThread.java
@@ -0,0 +1,235 @@
+/*
+ * Copyright (c) 2013, 2022, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package jdk.internal.misc;
+
+import java.security.AccessControlContext;
+import java.security.AccessController;
+import java.security.ProtectionDomain;
+import java.security.PrivilegedAction;
+import java.util.concurrent.atomic.AtomicInteger;
+
+/**
+ * A thread that has no permissions, is not a member of any user-defined
+ * ThreadGroup and supports the ability to erase ThreadLocals.
+ */
+@SuppressWarnings("removal")
+public final class InnocuousThread extends Thread {
+    private static final jdk.internal.misc.Unsafe UNSAFE;
+    private static final long THREAD_LOCALS;
+    private static final long INHERITABLE_THREAD_LOCALS;
+    private static final ThreadGroup INNOCUOUSTHREADGROUP;
+    private static final AccessControlContext ACC;
+    private static final long INHERITEDACCESSCONTROLCONTEXT;
+    private static final long CONTEXTCLASSLOADER;
+
+    private static final AtomicInteger threadNumber = new AtomicInteger(1);
+    private static String newName() {
+        return "InnocuousThread-" + threadNumber.getAndIncrement();
+    }
+
+    /**
+     * Returns a new InnocuousThread with an auto-generated thread name,
+     * and its context class loader is set to the system class loader.
+     */
+    public static Thread newThread(Runnable target) {
+        return newThread(newName(), target);
+    }
+
+    /**
+     * Returns a new InnocuousThread with its context class loader
+     * set to the system class loader.
+     */
+    public static Thread newThread(String name, Runnable target) {
+        return newThread(name, target, -1);
+    }
+    /**
+     * Returns a new InnocuousThread with its context class loader
+     * set to the system class loader. The thread priority will be
+     * set to the given priority.
+     */
+    public static Thread newThread(String name, Runnable target, int priority) {
+        if (System.getSecurityManager() == null) {
+            return createThread(name, target, 0L,
+                    ClassLoader.getSystemClassLoader(), priority);
+        }
+        return AccessController.doPrivileged(
+                new PrivilegedAction<Thread>() {
+                    @Override
+                    public Thread run() {
+                        return createThread(name, target, 0L,
+                                ClassLoader.getSystemClassLoader(), priority);
+                    }
+                });
+    }
+
+    /**
+     * Returns a new InnocuousThread with an auto-generated thread name.
+     * Its context class loader is set to null.
+     */
+    public static Thread newSystemThread(Runnable target) {
+        return newSystemThread(newName(), target);
+    }
+
+    /**
+     * Returns a new InnocuousThread with null context class loader.
+     */
+    public static Thread newSystemThread(String name, Runnable target) {
+        return newSystemThread(name, target, -1);
+    }
+
+    /**
+     * Returns a new InnocuousThread with null context class loader.
+     * Thread priority is set to the given priority.
+     */
+    public static Thread newSystemThread(String name, Runnable target, int priority) {
+        if (System.getSecurityManager() == null) {
+            return createThread(name, target, 0L, null, priority);
+        }
+        return AccessController.doPrivileged(
+                new PrivilegedAction<Thread>() {
+                    @Override
+                    public Thread run() {
+                        return createThread(name, target, 0L,
+                                null, priority);
+                    }
+                });
+    }
+
+    /**
+     * Returns a new InnocuousThread with null context class loader.
+     * Thread priority is set to the given priority.
+     */
+    public static Thread newSystemThread(String name, Runnable target,
+                                         long stackSize, int priority) {
+        if (System.getSecurityManager() == null) {
+            return createThread(name, target, stackSize, null, priority);
+        }
+        return AccessController.doPrivileged(
+                new PrivilegedAction<Thread>() {
+                    @Override
+                    public Thread run() {
+                        return createThread(name, target, 0L,
+                                null, priority);
+                    }
+                });
+    }
+
+    private static Thread createThread(String name, Runnable target, long stackSize,
+                                       ClassLoader loader, int priority) {
+        Thread t = new InnocuousThread(INNOCUOUSTHREADGROUP,
+                target, name, stackSize, loader);
+        if (priority >= 0) {
+            t.setPriority(priority);
+        }
+        return t;
+    }
+
+    private InnocuousThread(ThreadGroup group, Runnable target, String name,
+                            long stackSize, ClassLoader tccl) {
+        super(group, target, name, stackSize, false);
+        UNSAFE.putReferenceRelease(this, INHERITEDACCESSCONTROLCONTEXT, ACC);
+        UNSAFE.putReferenceRelease(this, CONTEXTCLASSLOADER, tccl);
+    }
+
+    @Override
+    public void setUncaughtExceptionHandler(UncaughtExceptionHandler x) {
+        // silently fail
+    }
+
+    @Override
+    public void setContextClassLoader(ClassLoader cl) {
+        // Allow clearing of the TCCL to remove the reference to the system classloader.
+        if (cl == null)
+            super.setContextClassLoader(null);
+        else
+            throw new SecurityException("setContextClassLoader");
+    }
+
+    /**
+     * Drops all thread locals (and inherited thread locals).
+     */
+    public final void eraseThreadLocals() {
+        UNSAFE.putReference(this, THREAD_LOCALS, null);
+        UNSAFE.putReference(this, INHERITABLE_THREAD_LOCALS, null);
+    }
+
+    // ensure run method is run only once
+    private volatile boolean hasRun;
+
+    @Override
+    public void run() {
+        if (Thread.currentThread() == this && !hasRun) {
+            hasRun = true;
+            super.run();
+        }
+    }
+
+    // Use Unsafe to access Thread group and ThreadGroup parent fields
+    static {
+        try {
+            ACC = new AccessControlContext(new ProtectionDomain[] {
+                new ProtectionDomain(null, null)
+            });
+
+            // Find and use topmost ThreadGroup as parent of new group
+            UNSAFE = jdk.internal.misc.Unsafe.getUnsafe();
+            Class<?> tk = Thread.class;
+            Class<?> gk = ThreadGroup.class;
+
+            THREAD_LOCALS = UNSAFE.objectFieldOffset(tk, "threadLocals");
+            INHERITABLE_THREAD_LOCALS = UNSAFE.objectFieldOffset
+                    (tk, "inheritableThreadLocals");
+            INHERITEDACCESSCONTROLCONTEXT = UNSAFE.objectFieldOffset
+                (tk, "inheritedAccessControlContext");
+            CONTEXTCLASSLOADER = UNSAFE.objectFieldOffset
+                (tk, "contextClassLoader");
+
+            long gp = UNSAFE.objectFieldOffset(gk, "parent");
+            ThreadGroup group = Thread.currentThread().getThreadGroup();
+
+            while (group != null) {
+                ThreadGroup parent = (ThreadGroup)UNSAFE.getReference(group, gp);
+                if (parent == null)
+                    break;
+                group = parent;
+            }
+            final ThreadGroup root = group;
+            if (System.getSecurityManager() == null) {
+                INNOCUOUSTHREADGROUP = new ThreadGroup(root, "InnocuousThreadGroup");
+            } else {
+                INNOCUOUSTHREADGROUP = AccessController.doPrivileged(
+                    new PrivilegedAction<ThreadGroup>() {
+                        @Override
+                        public ThreadGroup run() {
+                            return new ThreadGroup(root, "InnocuousThreadGroup");
+                        }
+                    });
+            }
+        } catch (Exception e) {
+            throw new Error(e);
+        }
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/misc/InternalLock.class b/tests/test_data/std/jdk/internal/misc/InternalLock.class
new file mode 100644
index 0000000000000000000000000000000000000000..42c3da4e7db33bceb6be016b9aee49e39fff129d
GIT binary patch
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/misc/InternalLock.java b/tests/test_data/std/jdk/internal/misc/InternalLock.java
new file mode 100644
index 00000000..d7a271e6
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/misc/InternalLock.java
@@ -0,0 +1,84 @@
+/*
+ * Copyright (c) 2021, 2022, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package jdk.internal.misc;
+
+import java.util.concurrent.locks.ReentrantLock;
+
+/**
+ * A reentrant mutual exclusion lock for internal use. The lock does not
+ * implement {@link java.util.concurrent.locks.Lock} or extend {@link
+ * java.util.concurrent.locks.ReentrantLock} so that it can be distinguished
+ * from lock objects accessible to subclasses of {@link java.io.Reader} and
+ * {@link java.io.Writer} (it is possible to create a Reader that uses a
+ * lock object of type ReentrantLock for example).
+ */
+public class InternalLock {
+    private static final boolean CAN_USE_INTERNAL_LOCK;
+    static {
+        String s = System.getProperty("jdk.io.useMonitors");
+        if (s != null && (s.isEmpty() || s.equals("true"))) {
+            CAN_USE_INTERNAL_LOCK = false;
+        } else {
+            CAN_USE_INTERNAL_LOCK = true;
+        }
+    }
+
+    private final ReentrantLock lock;
+
+    private InternalLock() {
+        this.lock = new ReentrantLock();
+    }
+
+    /**
+     * Returns a new InternalLock or null.
+     */
+    public static InternalLock newLockOrNull() {
+        return (CAN_USE_INTERNAL_LOCK) ? new InternalLock() : null;
+    }
+
+    /**
+     * Returns a new InternalLock or the given object.
+     */
+    public static Object newLockOr(Object obj) {
+        return (CAN_USE_INTERNAL_LOCK) ? new InternalLock() : obj;
+    }
+
+    public boolean tryLock() {
+        return lock.tryLock();
+    }
+
+    public void lock() {
+        lock.lock();
+    }
+
+    public void unlock() {
+        lock.unlock();
+    }
+
+    public boolean isHeldByCurrentThread() {
+        return lock.isHeldByCurrentThread();
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/misc/MethodFinder.class b/tests/test_data/std/jdk/internal/misc/MethodFinder.class
new file mode 100644
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/misc/MethodFinder.java b/tests/test_data/std/jdk/internal/misc/MethodFinder.java
new file mode 100644
index 00000000..970cebe7
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/misc/MethodFinder.java
@@ -0,0 +1,108 @@
+/*
+ * Copyright (c) 2023, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package jdk.internal.misc;
+
+import java.lang.reflect.Method;
+import java.lang.reflect.Modifier;
+
+import jdk.internal.access.JavaLangAccess;
+import jdk.internal.access.SharedSecrets;
+
+/**
+ * A collection of static methods that return specific method objects of interest.
+ */
+public class MethodFinder {
+
+    private static final JavaLangAccess JLA = SharedSecrets.getJavaLangAccess();
+
+    private MethodFinder() {
+        throw new AssertionError("private constructor");
+    }
+
+    /**
+     * Return the first method that meets the requirements of an application main method
+     * {@jls 12.1.4}. The method must:
+     * <ul>
+     * <li>be declared in this class's hierarchy</li>
+     * <li>have the name "main"</li>
+     * <li>have a single argument of type {@code String[]}, {@code String...} or no argument</li>
+     * <li>have the return type of void</li>
+     * <li>be public, protected or package private</li>
+     * <li>not be abstract</li>
+     *</ul>
+     *
+     * The method returned would be used by a launcher to initiate the execution of an
+     * application.
+     *
+     * Searching continues until a main method is found or the search is exhausted. The
+     * primary search occurs in two phases, once for a main method with a {@code
+     * String[]} or {@code String...} argument and failing that, once for a main method
+     * with a no arguments. The search itself uses recursion to first look at methods
+     * in this class, then default methods in this class's interface hierarchy and
+     * then repeating these steps with the class's super class.
+     *
+     * @apiNote The method returned may be declared in this class, a super class
+     * or as a default method of an interface that the class or super class
+     * implements.
+     * <p>It is not possible to declare a static main method and instance main
+     * method with the same signature in the same class. {@jls 8.4.2} states that
+     * "It is a compile-time error to declare two methods with override-equivalent
+     * signatures in a class."
+     * <p>{@link SecurityException SecurityExceptions} can halt
+     * the search. In this case, a null is returned.
+     *
+     * @return the main method if a method found or null if no method is found
+     *
+     * @jls 8.2 Class Members
+     * @jls 8.4 Method Declarations
+     * @jls 8.4.2 Method Signature
+     * @jls 12.1.4 Invoke a main method
+     */
+    public static Method findMainMethod(Class<?> cls) {
+        boolean isPreview = PreviewFeatures.isEnabled();
+        Method mainMethod = JLA.findMethod(cls, !isPreview, "main", String[].class);
+
+        if (isPreview && mainMethod == null) {
+            mainMethod = JLA.findMethod(cls, false, "main");
+        }
+
+        if (mainMethod == null) {
+            return null;
+        }
+
+        int mods = mainMethod.getModifiers();
+
+        if (Modifier.isAbstract(mods) ||
+                mainMethod.getReturnType() != void.class ||
+                (isPreview && Modifier.isPrivate(mods)) ||
+                (!isPreview && !Modifier.isStatic(mods))) {
+            return null;
+        }
+
+        return mainMethod;
+    }
+
+}
diff --git a/tests/test_data/std/jdk/internal/misc/OSEnvironment.class b/tests/test_data/std/jdk/internal/misc/OSEnvironment.class
new file mode 100644
index 0000000000000000000000000000000000000000..3be8e953837bb5c7d496530fbd3a7cb0be5a55aa
GIT binary patch
literal 352
zcmah^F;2rk5S(?Kn3#|RIwT|%i2^9N2N2OjP+6o1N`H1vu;zT0E=~%5MTJDc19%i-
z&p}93Y%z1Qd$XGT{CfWYFvDSr2%QA+0A2J5<5F+6vf4eWd0v{LA@ru~xVa&8&M%e;
z_6Vot>RGXCjCb0qir0mjFK*qIeeEja#1qfzl_88WcIJLl<;Fkg+)C#ts|#(H+H=r9
z&A55uHDQwdv-g^ihAgZtzsRz5QEz-<?zr9jC&E>@0}~{2UZ@BZ4ixN*Qo<zMy?g_`
ow&PSVjDZvE3l4T4gbzgZG5j?jiw@NqC4@Y8#xt>uL`4{X1Al5r(*OVf

literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/misc/OSEnvironment.java b/tests/test_data/std/jdk/internal/misc/OSEnvironment.java
new file mode 100644
index 00000000..506273a5
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/misc/OSEnvironment.java
@@ -0,0 +1,38 @@
+/*
+ * Copyright (c) 2005, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package jdk.internal.misc;
+
+public class OSEnvironment {
+
+    /*
+     * Initialize any miscellaneous operating system settings that need to be set
+     * for the class libraries.
+     */
+    public static void initialize() {
+        // no-op on Solaris and Linux
+    }
+
+}
diff --git a/tests/test_data/std/jdk/internal/misc/PreviewFeatures.class b/tests/test_data/std/jdk/internal/misc/PreviewFeatures.class
new file mode 100644
index 0000000000000000000000000000000000000000..56451a6950152e1aee7863beb8149b66d03dc63a
GIT binary patch
literal 757
zcmah{%Wl&^6g`uqbz+=02`$e;-3KB?1cP8jD-e`)6<VY~B)Xf}qjpkvY>g)^-@-Sr
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zaf;j|?=ij1M(>@0eI}!TCHmT*1Jqo?DsGYGjf-#_%j8w8j`@J4Q3fb|f%A!SY}9YZ
z15K**Cs0pOq!>^?NA)AB-%)?xxO|4ipHtYmQOQGUc|-tDhyW<UYRt7tkW(f;7u1(?
VWak{$zQVCn{sy<{HHsCm{s-d+oj(8o

literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/misc/PreviewFeatures.java b/tests/test_data/std/jdk/internal/misc/PreviewFeatures.java
new file mode 100644
index 00000000..05a0c2c4
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/misc/PreviewFeatures.java
@@ -0,0 +1,55 @@
+/*
+ * Copyright (c) 2022, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package jdk.internal.misc;
+
+/**
+ * Defines static methods to test if preview features are enabled at run-time.
+ */
+public class PreviewFeatures {
+    private static final boolean ENABLED = isPreviewEnabled();
+
+    private PreviewFeatures() {
+    }
+
+    /**
+     * {@return true if preview features are enabled, otherwise false}
+     */
+    public static boolean isEnabled() {
+        return ENABLED;
+    }
+
+    /**
+     * Ensures that preview features are enabled.
+     * @throws UnsupportedOperationException if preview features are not enabled
+     */
+    public static void ensureEnabled() {
+        if (!isEnabled()) {
+            throw new UnsupportedOperationException(
+                "Preview Features not enabled, need to run with --enable-preview");
+        }
+    }
+
+    private static native boolean isPreviewEnabled();
+}
diff --git a/tests/test_data/std/jdk/internal/misc/ScopedMemoryAccess$Scoped.class b/tests/test_data/std/jdk/internal/misc/ScopedMemoryAccess$Scoped.class
new file mode 100644
index 0000000000000000000000000000000000000000..07dcaeffad50ba64d09f829af974980dd3d13ae7
GIT binary patch
literal 534
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/misc/ScopedMemoryAccess$ScopedAccessError.class b/tests/test_data/std/jdk/internal/misc/ScopedMemoryAccess$ScopedAccessError.class
new file mode 100644
index 0000000000000000000000000000000000000000..af78ab25c7f14ba214f5fda52fa74c2290b6f778
GIT binary patch
literal 1160
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/misc/ScopedMemoryAccess.class b/tests/test_data/std/jdk/internal/misc/ScopedMemoryAccess.class
new file mode 100644
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diff --git a/tests/test_data/std/jdk/internal/misc/ScopedMemoryAccess.java b/tests/test_data/std/jdk/internal/misc/ScopedMemoryAccess.java
new file mode 100644
index 00000000..e1760325
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/misc/ScopedMemoryAccess.java
@@ -0,0 +1,4138 @@
+/*
+ * Copyright (c) 2020, 2022, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package jdk.internal.misc;
+
+import java.lang.annotation.ElementType;
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+import java.lang.annotation.Target;
+import java.lang.foreign.MemorySegment;
+import java.lang.ref.Reference;
+import java.io.FileDescriptor;
+import java.util.function.Supplier;
+
+import jdk.internal.access.JavaNioAccess;
+import jdk.internal.access.SharedSecrets;
+import jdk.internal.foreign.AbstractMemorySegmentImpl;
+import jdk.internal.foreign.MemorySessionImpl;
+import jdk.internal.util.ArraysSupport;
+import jdk.internal.vm.annotation.ForceInline;
+import jdk.internal.vm.vector.VectorSupport;
+
+
+/**
+ * This class defines low-level methods to access on-heap and off-heap memory. The methods in this class
+ * can be thought of as thin wrappers around methods provided in the {@link Unsafe} class. All the methods in this
+ * class accept one or more {@link MemorySessionImpl} parameter, which is used to validate as to whether access to memory
+ * can be performed in a safe fashion - more specifically, to ensure that the memory being accessed has not
+ * already been released (which would result in a hard VM crash).
+ * <p>
+ * Accessing and releasing memory from a single thread is not problematic - after all, a given thread cannot,
+ * at the same time, access a memory region <em>and</em> free it. But ensuring correctness of memory access
+ * when multiple threads are involved is much trickier, as there can be cases where a thread is accessing
+ * a memory region while another thread is releasing it.
+ * <p>
+ * This class provides tools to manage races when multiple threads are accessing and/or releasing the same memory
+ * session concurrently. More specifically, when a thread wants to release a memory session, it should call the
+ * {@link ScopedMemoryAccess#closeScope(MemorySessionImpl)} method. This method initiates thread-local handshakes with all the other VM threads,
+ * which are then stopped one by one. If any thread is found accessing a resource associated to the very memory session
+ * being closed, the handshake fails, and the session will not be closed.
+ * <p>
+ * This synchronization strategy relies on the idea that accessing memory is atomic with respect to checking the
+ * validity of the session associated with that memory region - that is, a thread that wants to perform memory access will be
+ * suspended either <em>before</em> a liveness check or <em>after</em> the memory access. To ensure this atomicity,
+ * all methods in this class are marked with the special {@link Scoped} annotation, which is recognized by the VM,
+ * and used during the thread-local handshake to detect (and stop) threads performing potentially problematic memory access
+ * operations. Additionally, to make sure that the session object(s) of the memory being accessed is always
+ * reachable during an access operation, all the methods in this class add reachability fences around the underlying
+ * unsafe access.
+ * <p>
+ * This form of synchronization allows APIs to use plain memory access without any other form of synchronization
+ * which might be deemed to expensive; in other words, this approach prioritizes the performance of memory access over
+ * that of releasing a shared memory resource.
+ */
+public class ScopedMemoryAccess {
+
+    private static final Unsafe UNSAFE = Unsafe.getUnsafe();
+
+    private static native void registerNatives();
+    static {
+        registerNatives();
+    }
+
+    public void closeScope(MemorySessionImpl session, ScopedAccessError error) {
+        closeScope0(session, error);
+    }
+
+    native void closeScope0(MemorySessionImpl session, ScopedAccessError error);
+
+    private ScopedMemoryAccess() {}
+
+    private static final ScopedMemoryAccess theScopedMemoryAccess = new ScopedMemoryAccess();
+
+    public static ScopedMemoryAccess getScopedMemoryAccess() {
+        return theScopedMemoryAccess;
+    }
+
+    public static final class ScopedAccessError extends Error {
+
+        @SuppressWarnings("serial")
+        private final Supplier<RuntimeException> runtimeExceptionSupplier;
+
+        public ScopedAccessError(Supplier<RuntimeException> runtimeExceptionSupplier) {
+            super("Invalid memory access", null, false, false);
+            this.runtimeExceptionSupplier = runtimeExceptionSupplier;
+        }
+
+        static final long serialVersionUID = 1L;
+
+        public final RuntimeException newRuntimeException() {
+            return runtimeExceptionSupplier.get();
+        }
+    }
+
+    @Target({ElementType.METHOD, ElementType.CONSTRUCTOR})
+    @Retention(RetentionPolicy.RUNTIME)
+    @interface Scoped { }
+
+    // bulk ops
+
+    @ForceInline
+    public void copyMemory(MemorySessionImpl srcSession, MemorySessionImpl dstSession,
+                                   Object srcBase, long srcOffset,
+                                   Object destBase, long destOffset,
+                                   long bytes) {
+          try {
+              copyMemoryInternal(srcSession, dstSession, srcBase, srcOffset, destBase, destOffset, bytes);
+          } catch (ScopedAccessError ex) {
+              throw ex.newRuntimeException();
+          }
+    }
+
+    @ForceInline @Scoped
+    private void copyMemoryInternal(MemorySessionImpl srcSession, MemorySessionImpl dstSession,
+                               Object srcBase, long srcOffset,
+                               Object destBase, long destOffset,
+                               long bytes) {
+        try {
+            if (srcSession != null) {
+                srcSession.checkValidStateRaw();
+            }
+            if (dstSession != null) {
+                dstSession.checkValidStateRaw();
+            }
+            UNSAFE.copyMemory(srcBase, srcOffset, destBase, destOffset, bytes);
+        } finally {
+            Reference.reachabilityFence(srcSession);
+            Reference.reachabilityFence(dstSession);
+        }
+    }
+
+    @ForceInline
+    public void copySwapMemory(MemorySessionImpl srcSession, MemorySessionImpl dstSession,
+                                   Object srcBase, long srcOffset,
+                                   Object destBase, long destOffset,
+                                   long bytes, long elemSize) {
+          try {
+              copySwapMemoryInternal(srcSession, dstSession, srcBase, srcOffset, destBase, destOffset, bytes, elemSize);
+          } catch (ScopedAccessError ex) {
+              throw ex.newRuntimeException();
+          }
+    }
+
+    @ForceInline @Scoped
+    private void copySwapMemoryInternal(MemorySessionImpl srcSession, MemorySessionImpl dstSession,
+                               Object srcBase, long srcOffset,
+                               Object destBase, long destOffset,
+                               long bytes, long elemSize) {
+        try {
+            if (srcSession != null) {
+                srcSession.checkValidStateRaw();
+            }
+            if (dstSession != null) {
+                dstSession.checkValidStateRaw();
+            }
+            UNSAFE.copySwapMemory(srcBase, srcOffset, destBase, destOffset, bytes, elemSize);
+        } finally {
+            Reference.reachabilityFence(srcSession);
+            Reference.reachabilityFence(dstSession);
+        }
+    }
+
+    @ForceInline
+    public void setMemory(MemorySessionImpl session, Object o, long offset, long bytes, byte value) {
+        try {
+            setMemoryInternal(session, o, offset, bytes, value);
+        } catch (ScopedAccessError ex) {
+            throw ex.newRuntimeException();
+        }
+    }
+
+    @ForceInline @Scoped
+    private void setMemoryInternal(MemorySessionImpl session, Object o, long offset, long bytes, byte value) {
+        try {
+            if (session != null) {
+                session.checkValidStateRaw();
+            }
+            UNSAFE.setMemory(o, offset, bytes, value);
+        } finally {
+            Reference.reachabilityFence(session);
+        }
+    }
+
+    @ForceInline
+    public int vectorizedMismatch(MemorySessionImpl aSession, MemorySessionImpl bSession,
+                                             Object a, long aOffset,
+                                             Object b, long bOffset,
+                                             int length,
+                                             int log2ArrayIndexScale) {
+        try {
+            return vectorizedMismatchInternal(aSession, bSession, a, aOffset, b, bOffset, length, log2ArrayIndexScale);
+        } catch (ScopedAccessError ex) {
+            throw ex.newRuntimeException();
+        }
+    }
+
+    @ForceInline @Scoped
+    private int vectorizedMismatchInternal(MemorySessionImpl aSession, MemorySessionImpl bSession,
+                                             Object a, long aOffset,
+                                             Object b, long bOffset,
+                                             int length,
+                                             int log2ArrayIndexScale) {
+        try {
+            if (aSession != null) {
+                aSession.checkValidStateRaw();
+            }
+            if (bSession != null) {
+                bSession.checkValidStateRaw();
+            }
+            return ArraysSupport.vectorizedMismatch(a, aOffset, b, bOffset, length, log2ArrayIndexScale);
+        } finally {
+            Reference.reachabilityFence(aSession);
+            Reference.reachabilityFence(bSession);
+        }
+    }
+
+    @ForceInline
+    public boolean isLoaded(MemorySessionImpl session, long address, boolean isSync, long size) {
+        try {
+            return isLoadedInternal(session, address, isSync, size);
+        } catch (ScopedAccessError ex) {
+            throw ex.newRuntimeException();
+        }
+    }
+
+    @ForceInline @Scoped
+    public boolean isLoadedInternal(MemorySessionImpl session, long address, boolean isSync, long size) {
+        try {
+            if (session != null) {
+                session.checkValidStateRaw();
+            }
+            return SharedSecrets.getJavaNioAccess().isLoaded(address, isSync, size);
+        } finally {
+            Reference.reachabilityFence(session);
+        }
+    }
+
+    @ForceInline
+    public void load(MemorySessionImpl session, long address, boolean isSync, long size) {
+        try {
+            loadInternal(session, address, isSync, size);
+        } catch (ScopedAccessError ex) {
+            throw ex.newRuntimeException();
+        }
+    }
+
+    @ForceInline @Scoped
+    public void loadInternal(MemorySessionImpl session, long address, boolean isSync, long size) {
+        try {
+            if (session != null) {
+                session.checkValidStateRaw();
+            }
+            SharedSecrets.getJavaNioAccess().load(address, isSync, size);
+        } finally {
+            Reference.reachabilityFence(session);
+        }
+    }
+
+    @ForceInline
+    public void unload(MemorySessionImpl session, long address, boolean isSync, long size) {
+        try {
+            unloadInternal(session, address, isSync, size);
+        } catch (ScopedAccessError ex) {
+            throw ex.newRuntimeException();
+        }
+    }
+
+    @ForceInline @Scoped
+    public void unloadInternal(MemorySessionImpl session, long address, boolean isSync, long size) {
+        try {
+            if (session != null) {
+                session.checkValidStateRaw();
+            }
+            SharedSecrets.getJavaNioAccess().unload(address, isSync, size);
+        } finally {
+            Reference.reachabilityFence(session);
+        }
+    }
+
+    @ForceInline
+    public void force(MemorySessionImpl session, FileDescriptor fd, long address, boolean isSync, long index, long length) {
+        try {
+            forceInternal(session, fd, address, isSync, index, length);
+        } catch (ScopedAccessError ex) {
+            throw ex.newRuntimeException();
+        }
+    }
+
+    @ForceInline @Scoped
+    public void forceInternal(MemorySessionImpl session, FileDescriptor fd, long address, boolean isSync, long index, long length) {
+        try {
+            if (session != null) {
+                session.checkValidStateRaw();
+            }
+            SharedSecrets.getJavaNioAccess().force(fd, address, isSync, index, length);
+        } finally {
+            Reference.reachabilityFence(session);
+        }
+    }
+
+    // MemorySegment vector access ops
+
+    @ForceInline
+    public static
+    <V extends VectorSupport.Vector<E>, E, S extends VectorSupport.VectorSpecies<E>>
+    V loadFromMemorySegment(Class<? extends V> vmClass, Class<E> e, int length,
+                         AbstractMemorySegmentImpl msp, long offset,
+                         S s,
+                         VectorSupport.LoadOperation<AbstractMemorySegmentImpl, V, S> defaultImpl) {
+
+        try {
+            return loadFromMemorySegmentScopedInternal(
+                    msp.sessionImpl(),
+                    vmClass, e, length,
+                    msp, offset,
+                    s,
+                    defaultImpl);
+        } catch (ScopedAccessError ex) {
+            throw ex.newRuntimeException();
+        }
+    }
+
+    @Scoped
+    @ForceInline
+    private static
+    <V extends VectorSupport.Vector<E>, E, S extends VectorSupport.VectorSpecies<E>>
+    V loadFromMemorySegmentScopedInternal(MemorySessionImpl session,
+                                          Class<? extends V> vmClass, Class<E> e, int length,
+                                          AbstractMemorySegmentImpl msp, long offset,
+                                          S s,
+                                          VectorSupport.LoadOperation<AbstractMemorySegmentImpl, V, S> defaultImpl) {
+        try {
+            session.checkValidStateRaw();
+
+            return VectorSupport.load(vmClass, e, length,
+                    msp.unsafeGetBase(), msp.unsafeGetOffset() + offset, true,
+                    msp, offset, s,
+                    defaultImpl);
+        } finally {
+            Reference.reachabilityFence(session);
+        }
+    }
+
+    @ForceInline
+    public static
+    <V extends VectorSupport.Vector<E>, E, S extends VectorSupport.VectorSpecies<E>,
+     M extends VectorSupport.VectorMask<E>>
+    V loadFromMemorySegmentMasked(Class<? extends V> vmClass, Class<M> maskClass, Class<E> e,
+                                  int length, AbstractMemorySegmentImpl msp, long offset, M m, S s, int offsetInRange,
+                                  VectorSupport.LoadVectorMaskedOperation<AbstractMemorySegmentImpl, V, S, M> defaultImpl) {
+
+        try {
+            return loadFromMemorySegmentMaskedScopedInternal(
+                    msp.sessionImpl(),
+                    vmClass, maskClass, e, length,
+                    msp, offset, m,
+                    s, offsetInRange,
+                    defaultImpl);
+        } catch (ScopedAccessError ex) {
+            throw ex.newRuntimeException();
+        }
+    }
+
+    @Scoped
+    @ForceInline
+    private static
+    <V extends VectorSupport.Vector<E>, E, S extends VectorSupport.VectorSpecies<E>,
+     M extends VectorSupport.VectorMask<E>>
+    V loadFromMemorySegmentMaskedScopedInternal(MemorySessionImpl session, Class<? extends V> vmClass,
+                                                Class<M> maskClass, Class<E> e, int length,
+                                                AbstractMemorySegmentImpl msp, long offset, M m,
+                                                S s, int offsetInRange,
+                                                VectorSupport.LoadVectorMaskedOperation<AbstractMemorySegmentImpl, V, S, M> defaultImpl) {
+        try {
+            session.checkValidStateRaw();
+
+            return VectorSupport.loadMasked(vmClass, maskClass, e, length,
+                    msp.unsafeGetBase(), msp.unsafeGetOffset() + offset, true, m, offsetInRange,
+                    msp, offset, s,
+                    defaultImpl);
+        } finally {
+            Reference.reachabilityFence(session);
+        }
+    }
+
+    @ForceInline
+    public static
+    <V extends VectorSupport.Vector<E>, E>
+    void storeIntoMemorySegment(Class<? extends V> vmClass, Class<E> e, int length,
+                                V v,
+                                AbstractMemorySegmentImpl msp, long offset,
+                                VectorSupport.StoreVectorOperation<AbstractMemorySegmentImpl, V> defaultImpl) {
+
+        try {
+            storeIntoMemorySegmentScopedInternal(
+                    msp.sessionImpl(),
+                    vmClass, e, length,
+                    v,
+                    msp, offset,
+                    defaultImpl);
+        } catch (ScopedAccessError ex) {
+            throw ex.newRuntimeException();
+        }
+    }
+
+    @Scoped
+    @ForceInline
+    private static
+    <V extends VectorSupport.Vector<E>, E>
+    void storeIntoMemorySegmentScopedInternal(MemorySessionImpl session,
+                                              Class<? extends V> vmClass, Class<E> e, int length,
+                                              V v,
+                                              AbstractMemorySegmentImpl msp, long offset,
+                                              VectorSupport.StoreVectorOperation<AbstractMemorySegmentImpl, V> defaultImpl) {
+        try {
+            session.checkValidStateRaw();
+
+            VectorSupport.store(vmClass, e, length,
+                    msp.unsafeGetBase(), msp.unsafeGetOffset() + offset, true,
+                    v,
+                    msp, offset,
+                    defaultImpl);
+        } finally {
+            Reference.reachabilityFence(session);
+        }
+    }
+
+    @ForceInline
+    public static
+    <V extends VectorSupport.Vector<E>, E, M extends VectorSupport.VectorMask<E>>
+    void storeIntoMemorySegmentMasked(Class<? extends V> vmClass, Class<M> maskClass, Class<E> e,
+                                      int length, V v, M m,
+                                      AbstractMemorySegmentImpl msp, long offset,
+                                      VectorSupport.StoreVectorMaskedOperation<AbstractMemorySegmentImpl, V, M> defaultImpl) {
+
+        try {
+            storeIntoMemorySegmentMaskedScopedInternal(
+                    msp.sessionImpl(),
+                    vmClass, maskClass, e, length,
+                    v, m,
+                    msp, offset,
+                    defaultImpl);
+        } catch (ScopedAccessError ex) {
+            throw ex.newRuntimeException();
+        }
+    }
+
+    @Scoped
+    @ForceInline
+    private static
+    <V extends VectorSupport.Vector<E>, E, M extends VectorSupport.VectorMask<E>>
+    void storeIntoMemorySegmentMaskedScopedInternal(MemorySessionImpl session,
+                                                    Class<? extends V> vmClass, Class<M> maskClass,
+                                                    Class<E> e, int length, V v, M m,
+                                                    AbstractMemorySegmentImpl msp, long offset,
+                                                    VectorSupport.StoreVectorMaskedOperation<AbstractMemorySegmentImpl, V, M> defaultImpl) {
+        try {
+            session.checkValidStateRaw();
+
+            VectorSupport.storeMasked(vmClass, maskClass, e, length,
+                    msp.unsafeGetBase(), msp.unsafeGetOffset() + offset, true,
+                    v, m,
+                    msp, offset,
+                    defaultImpl);
+        } finally {
+            Reference.reachabilityFence(session);
+        }
+    }
+
+    // typed-ops here
+
+    // Note: all the accessor methods defined below take advantage of argument type profiling
+    // (see src/hotspot/share/oops/methodData.cpp) which greatly enhances performance when the same accessor
+    // method is used repeatedly with different 'base' objects.
+    @ForceInline
+    public byte getByte(MemorySessionImpl session, Object base, long offset) {
+        try {
+            return getByteInternal(session, base, offset);
+        } catch (ScopedAccessError ex) {
+            throw ex.newRuntimeException();
+        }
+    }
+
+    @ForceInline @Scoped
+    private byte getByteInternal(MemorySessionImpl session, Object base, long offset) {
+        try {
+            if (session != null) {
+                session.checkValidStateRaw();
+            }
+            return UNSAFE.getByte(base, offset);
+        } finally {
+            Reference.reachabilityFence(session);
+        }
+    }
+
+    @ForceInline
+    public void putByte(MemorySessionImpl session, Object base, long offset, byte value) {
+        try {
+            putByteInternal(session, base, offset, value);
+        } catch (ScopedAccessError ex) {
+            throw ex.newRuntimeException();
+        }
+    }
+
+    @ForceInline @Scoped
+    private void putByteInternal(MemorySessionImpl session, Object base, long offset, byte value) {
+        try {
+            if (session != null) {
+                session.checkValidStateRaw();
+            }
+            UNSAFE.putByte(base, offset, value);
+        } finally {
+            Reference.reachabilityFence(session);
+        }
+    }
+
+
+    @ForceInline
+    public byte getByteVolatile(MemorySessionImpl session, Object base, long offset) {
+        try {
+            return getByteVolatileInternal(session, base, offset);
+        } catch (ScopedAccessError ex) {
+            throw ex.newRuntimeException();
+        }
+    }
+
+    @ForceInline @Scoped
+    private byte getByteVolatileInternal(MemorySessionImpl session, Object base, long offset) {
+        try {
+            if (session != null) {
+                session.checkValidStateRaw();
+            }
+            return UNSAFE.getByteVolatile(base, offset);
+        } finally {
+            Reference.reachabilityFence(session);
+        }
+    }
+
+    @ForceInline
+    public void putByteVolatile(MemorySessionImpl session, Object base, long offset, byte value) {
+        try {
+            putByteVolatileInternal(session, base, offset, value);
+        } catch (ScopedAccessError ex) {
+            throw ex.newRuntimeException();
+        }
+    }
+
+    @ForceInline @Scoped
+    private void putByteVolatileInternal(MemorySessionImpl session, Object base, long offset, byte value) {
+        try {
+            if (session != null) {
+                session.checkValidStateRaw();
+            }
+            UNSAFE.putByteVolatile(base, offset, value);
+        } finally {
+            Reference.reachabilityFence(session);
+        }
+    }
+
+    @ForceInline
+    public byte getByteAcquire(MemorySessionImpl session, Object base, long offset) {
+        try {
+            return getByteAcquireInternal(session, base, offset);
+        } catch (ScopedAccessError ex) {
+            throw ex.newRuntimeException();
+        }
+    }
+
+    @ForceInline @Scoped
+    private byte getByteAcquireInternal(MemorySessionImpl session, Object base, long offset) {
+        try {
+            if (session != null) {
+                session.checkValidStateRaw();
+            }
+            return UNSAFE.getByteAcquire(base, offset);
+        } finally {
+            Reference.reachabilityFence(session);
+        }
+    }
+
+    @ForceInline
+    public void putByteRelease(MemorySessionImpl session, Object base, long offset, byte value) {
+        try {
+            putByteReleaseInternal(session, base, offset, value);
+        } catch (ScopedAccessError ex) {
+            throw ex.newRuntimeException();
+        }
+    }
+
+    @ForceInline @Scoped
+    private void putByteReleaseInternal(MemorySessionImpl session, Object base, long offset, byte value) {
+        try {
+            if (session != null) {
+                session.checkValidStateRaw();
+            }
+            UNSAFE.putByteRelease(base, offset, value);
+        } finally {
+            Reference.reachabilityFence(session);
+        }
+    }
+
+    @ForceInline
+    public byte getByteOpaque(MemorySessionImpl session, Object base, long offset) {
+        try {
+            return getByteOpaqueInternal(session, base, offset);
+        } catch (ScopedAccessError ex) {
+            throw ex.newRuntimeException();
+        }
+    }
+
+    @ForceInline @Scoped
+    private byte getByteOpaqueInternal(MemorySessionImpl session, Object base, long offset) {
+        try {
+            if (session != null) {
+                session.checkValidStateRaw();
+            }
+            return UNSAFE.getByteOpaque(base, offset);
+        } finally {
+            Reference.reachabilityFence(session);
+        }
+    }
+    @ForceInline
+    public void putByteOpaque(MemorySessionImpl session, Object base, long offset, byte value) {
+        try {
+            putByteOpaqueInternal(session, base, offset, value);
+        } catch (ScopedAccessError ex) {
+            throw ex.newRuntimeException();
+        }
+    }
+
+    @ForceInline @Scoped
+    private void putByteOpaqueInternal(MemorySessionImpl session, Object base, long offset, byte value) {
+        try {
+            if (session != null) {
+                session.checkValidStateRaw();
+            }
+            UNSAFE.putByteOpaque(base, offset, value);
+        } finally {
+            Reference.reachabilityFence(session);
+        }
+    }
+
+    @ForceInline
+    public byte getAndAddByte(MemorySessionImpl session, Object base, long offset, byte delta) {
+        try {
+            return getAndAddByteInternal(session, base, offset, delta);
+        } catch (ScopedAccessError ex) {
+            throw ex.newRuntimeException();
+        }
+    }
+
+    @ForceInline @Scoped
+    private byte getAndAddByteInternal(MemorySessionImpl session, Object base, long offset, byte delta) {
+        try {
+            if (session != null) {
+                session.checkValidStateRaw();
+            }
+            return UNSAFE.getAndAddByte(base, offset, delta);
+        } finally {
+            Reference.reachabilityFence(session);
+        }
+    }
+
+    @ForceInline
+    public byte getAndAddByteAcquire(MemorySessionImpl session, Object base, long offset, byte delta) {
+        try {
+            return getAndAddByteAcquireInternal(session, base, offset, delta);
+        } catch (ScopedAccessError ex) {
+            throw ex.newRuntimeException();
+        }
+    }
+
+    @ForceInline @Scoped
+    private byte getAndAddByteAcquireInternal(MemorySessionImpl session, Object base, long offset, byte delta) {
+        try {
+            if (session != null) {
+                session.checkValidStateRaw();
+            }
+            return UNSAFE.getAndAddByteAcquire(base, offset, delta);
+        } finally {
+            Reference.reachabilityFence(session);
+        }
+    }
+
+    @ForceInline
+    public byte getAndAddByteRelease(MemorySessionImpl session, Object base, long offset, byte delta) {
+        try {
+            return getAndAddByteReleaseInternal(session, base, offset, delta);
+        } catch (ScopedAccessError ex) {
+            throw ex.newRuntimeException();
+        }
+    }
+
+    @ForceInline @Scoped
+    private byte getAndAddByteReleaseInternal(MemorySessionImpl session, Object base, long offset, byte delta) {
+        try {
+            if (session != null) {
+                session.checkValidStateRaw();
+            }
+            return UNSAFE.getAndAddByteRelease(base, offset, delta);
+        } finally {
+            Reference.reachabilityFence(session);
+        }
+    }
+
+    @ForceInline
+    public byte getAndBitwiseOrByte(MemorySessionImpl session, Object base, long offset, byte value) {
+        try {
+            return getAndBitwiseOrByteInternal(session, base, offset, value);
+        } catch (ScopedAccessError ex) {
+            throw ex.newRuntimeException();
+        }
+    }
+
+    @ForceInline @Scoped
+    private byte getAndBitwiseOrByteInternal(MemorySessionImpl session, Object base, long offset, byte value) {
+        try {
+            if (session != null) {
+                session.checkValidStateRaw();
+            }
+            return UNSAFE.getAndBitwiseOrByte(base, offset, value);
+        } finally {
+            Reference.reachabilityFence(session);
+        }
+    }
+
+    @ForceInline
+    public byte getAndBitwiseOrByteAcquire(MemorySessionImpl session, Object base, long offset, byte value) {
+        try {
+            return getAndBitwiseOrByteAcquireInternal(session, base, offset, value);
+        } catch (ScopedAccessError ex) {
+            throw ex.newRuntimeException();
+        }
+    }
+
+    @ForceInline @Scoped
+    private byte getAndBitwiseOrByteAcquireInternal(MemorySessionImpl session, Object base, long offset, byte value) {
+        try {
+            if (session != null) {
+                session.checkValidStateRaw();
+            }
+            return UNSAFE.getAndBitwiseOrByteAcquire(base, offset, value);
+        } finally {
+            Reference.reachabilityFence(session);
+        }
+    }
+
+    @ForceInline
+    public byte getAndBitwiseOrByteRelease(MemorySessionImpl session, Object base, long offset, byte value) {
+        try {
+            return getAndBitwiseOrByteReleaseInternal(session, base, offset, value);
+        } catch (ScopedAccessError ex) {
+            throw ex.newRuntimeException();
+        }
+    }
+
+    @ForceInline @Scoped
+    private byte getAndBitwiseOrByteReleaseInternal(MemorySessionImpl session, Object base, long offset, byte value) {
+        try {
+            if (session != null) {
+                session.checkValidStateRaw();
+            }
+            return UNSAFE.getAndBitwiseOrByteRelease(base, offset, value);
+        } finally {
+            Reference.reachabilityFence(session);
+        }
+    }
+
+    @ForceInline
+    public byte getAndBitwiseAndByte(MemorySessionImpl session, Object base, long offset, byte value) {
+        try {
+            return getAndBitwiseAndByteInternal(session, base, offset, value);
+        } catch (ScopedAccessError ex) {
+            throw ex.newRuntimeException();
+        }
+    }
+
+    @ForceInline @Scoped
+    private byte getAndBitwiseAndByteInternal(MemorySessionImpl session, Object base, long offset, byte value) {
+        try {
+            if (session != null) {
+                session.checkValidStateRaw();
+            }
+            return UNSAFE.getAndBitwiseAndByte(base, offset, value);
+        } finally {
+            Reference.reachabilityFence(session);
+        }
+    }
+
+    @ForceInline
+    public byte getAndBitwiseAndByteAcquire(MemorySessionImpl session, Object base, long offset, byte value) {
+        try {
+            return getAndBitwiseAndByteAcquireInternal(session, base, offset, value);
+        } catch (ScopedAccessError ex) {
+            throw ex.newRuntimeException();
+        }
+    }
+
+    @ForceInline @Scoped
+    private byte getAndBitwiseAndByteAcquireInternal(MemorySessionImpl session, Object base, long offset, byte value) {
+        try {
+            if (session != null) {
+                session.checkValidStateRaw();
+            }
+            return UNSAFE.getAndBitwiseAndByteAcquire(base, offset, value);
+        } finally {
+            Reference.reachabilityFence(session);
+        }
+    }
+
+    @ForceInline
+    public byte getAndBitwiseAndByteRelease(MemorySessionImpl session, Object base, long offset, byte value) {
+        try {
+            return getAndBitwiseAndByteReleaseInternal(session, base, offset, value);
+        } catch (ScopedAccessError ex) {
+            throw ex.newRuntimeException();
+        }
+    }
+
+    @ForceInline @Scoped
+    private byte getAndBitwiseAndByteReleaseInternal(MemorySessionImpl session, Object base, long offset, byte value) {
+        try {
+            if (session != null) {
+                session.checkValidStateRaw();
+            }
+            return UNSAFE.getAndBitwiseAndByteRelease(base, offset, value);
+        } finally {
+            Reference.reachabilityFence(session);
+        }
+    }
+
+    @ForceInline
+    public byte getAndBitwiseXorByte(MemorySessionImpl session, Object base, long offset, byte value) {
+        try {
+            return getAndBitwiseXorByteInternal(session, base, offset, value);
+        } catch (ScopedAccessError ex) {
+            throw ex.newRuntimeException();
+        }
+    }
+
+    @ForceInline @Scoped
+    private byte getAndBitwiseXorByteInternal(MemorySessionImpl session, Object base, long offset, byte value) {
+        try {
+            if (session != null) {
+                session.checkValidStateRaw();
+            }
+            return UNSAFE.getAndBitwiseXorByte(base, offset, value);
+        } finally {
+            Reference.reachabilityFence(session);
+        }
+    }
+
+    @ForceInline
+    public byte getAndBitwiseXorByteAcquire(MemorySessionImpl session, Object base, long offset, byte value) {
+        try {
+            return getAndBitwiseXorByteAcquireInternal(session, base, offset, value);
+        } catch (ScopedAccessError ex) {
+            throw ex.newRuntimeException();
+        }
+    }
+
+    @ForceInline @Scoped
+    private byte getAndBitwiseXorByteAcquireInternal(MemorySessionImpl session, Object base, long offset, byte value) {
+        try {
+            if (session != null) {
+                session.checkValidStateRaw();
+            }
+            return UNSAFE.getAndBitwiseXorByteAcquire(base, offset, value);
+        } finally {
+            Reference.reachabilityFence(session);
+        }
+    }
+
+    @ForceInline
+    public byte getAndBitwiseXorByteRelease(MemorySessionImpl session, Object base, long offset, byte value) {
+        try {
+            return getAndBitwiseXorByteReleaseInternal(session, base, offset, value);
+        } catch (ScopedAccessError ex) {
+            throw ex.newRuntimeException();
+        }
+    }
+
+    @ForceInline @Scoped
+    private byte getAndBitwiseXorByteReleaseInternal(MemorySessionImpl session, Object base, long offset, byte value) {
+        try {
+            if (session != null) {
+                session.checkValidStateRaw();
+            }
+            return UNSAFE.getAndBitwiseXorByteRelease(base, offset, value);
+        } finally {
+            Reference.reachabilityFence(session);
+        }
+    }
+    @ForceInline
+    public short getShort(MemorySessionImpl session, Object base, long offset) {
+        try {
+            return getShortInternal(session, base, offset);
+        } catch (ScopedAccessError ex) {
+            throw ex.newRuntimeException();
+        }
+    }
+
+    @ForceInline @Scoped
+    private short getShortInternal(MemorySessionImpl session, Object base, long offset) {
+        try {
+            if (session != null) {
+                session.checkValidStateRaw();
+            }
+            return UNSAFE.getShort(base, offset);
+        } finally {
+            Reference.reachabilityFence(session);
+        }
+    }
+
+    @ForceInline
+    public void putShort(MemorySessionImpl session, Object base, long offset, short value) {
+        try {
+            putShortInternal(session, base, offset, value);
+        } catch (ScopedAccessError ex) {
+            throw ex.newRuntimeException();
+        }
+    }
+
+    @ForceInline @Scoped
+    private void putShortInternal(MemorySessionImpl session, Object base, long offset, short value) {
+        try {
+            if (session != null) {
+                session.checkValidStateRaw();
+            }
+            UNSAFE.putShort(base, offset, value);
+        } finally {
+            Reference.reachabilityFence(session);
+        }
+    }
+
+    @ForceInline
+    public short getShortUnaligned(MemorySessionImpl session, Object base, long offset, boolean be) {
+        try {
+            return getShortUnalignedInternal(session, base, offset, be);
+        } catch (ScopedAccessError ex) {
+            throw ex.newRuntimeException();
+        }
+    }
+
+    @ForceInline @Scoped
+    private short getShortUnalignedInternal(MemorySessionImpl session, Object base, long offset, boolean be) {
+        try {
+            if (session != null) {
+                session.checkValidStateRaw();
+            }
+            return UNSAFE.getShortUnaligned(base, offset, be);
+        } finally {
+            Reference.reachabilityFence(session);
+        }
+    }
+
+    @ForceInline
+    public void putShortUnaligned(MemorySessionImpl session, Object base, long offset, short value, boolean be) {
+        try {
+            putShortUnalignedInternal(session, base, offset, value, be);
+        } catch (ScopedAccessError ex) {
+            throw ex.newRuntimeException();
+        }
+    }
+
+    @ForceInline @Scoped
+    private void putShortUnalignedInternal(MemorySessionImpl session, Object base, long offset, short value, boolean be) {
+        try {
+            if (session != null) {
+                session.checkValidStateRaw();
+            }
+            UNSAFE.putShortUnaligned(base, offset, value, be);
+        } finally {
+            Reference.reachabilityFence(session);
+        }
+    }
+
+    @ForceInline
+    public short getShortVolatile(MemorySessionImpl session, Object base, long offset) {
+        try {
+            return getShortVolatileInternal(session, base, offset);
+        } catch (ScopedAccessError ex) {
+            throw ex.newRuntimeException();
+        }
+    }
+
+    @ForceInline @Scoped
+    private short getShortVolatileInternal(MemorySessionImpl session, Object base, long offset) {
+        try {
+            if (session != null) {
+                session.checkValidStateRaw();
+            }
+            return UNSAFE.getShortVolatile(base, offset);
+        } finally {
+            Reference.reachabilityFence(session);
+        }
+    }
+
+    @ForceInline
+    public void putShortVolatile(MemorySessionImpl session, Object base, long offset, short value) {
+        try {
+            putShortVolatileInternal(session, base, offset, value);
+        } catch (ScopedAccessError ex) {
+            throw ex.newRuntimeException();
+        }
+    }
+
+    @ForceInline @Scoped
+    private void putShortVolatileInternal(MemorySessionImpl session, Object base, long offset, short value) {
+        try {
+            if (session != null) {
+                session.checkValidStateRaw();
+            }
+            UNSAFE.putShortVolatile(base, offset, value);
+        } finally {
+            Reference.reachabilityFence(session);
+        }
+    }
+
+    @ForceInline
+    public short getShortAcquire(MemorySessionImpl session, Object base, long offset) {
+        try {
+            return getShortAcquireInternal(session, base, offset);
+        } catch (ScopedAccessError ex) {
+            throw ex.newRuntimeException();
+        }
+    }
+
+    @ForceInline @Scoped
+    private short getShortAcquireInternal(MemorySessionImpl session, Object base, long offset) {
+        try {
+            if (session != null) {
+                session.checkValidStateRaw();
+            }
+            return UNSAFE.getShortAcquire(base, offset);
+        } finally {
+            Reference.reachabilityFence(session);
+        }
+    }
+
+    @ForceInline
+    public void putShortRelease(MemorySessionImpl session, Object base, long offset, short value) {
+        try {
+            putShortReleaseInternal(session, base, offset, value);
+        } catch (ScopedAccessError ex) {
+            throw ex.newRuntimeException();
+        }
+    }
+
+    @ForceInline @Scoped
+    private void putShortReleaseInternal(MemorySessionImpl session, Object base, long offset, short value) {
+        try {
+            if (session != null) {
+                session.checkValidStateRaw();
+            }
+            UNSAFE.putShortRelease(base, offset, value);
+        } finally {
+            Reference.reachabilityFence(session);
+        }
+    }
+
+    @ForceInline
+    public short getShortOpaque(MemorySessionImpl session, Object base, long offset) {
+        try {
+            return getShortOpaqueInternal(session, base, offset);
+        } catch (ScopedAccessError ex) {
+            throw ex.newRuntimeException();
+        }
+    }
+
+    @ForceInline @Scoped
+    private short getShortOpaqueInternal(MemorySessionImpl session, Object base, long offset) {
+        try {
+            if (session != null) {
+                session.checkValidStateRaw();
+            }
+            return UNSAFE.getShortOpaque(base, offset);
+        } finally {
+            Reference.reachabilityFence(session);
+        }
+    }
+    @ForceInline
+    public void putShortOpaque(MemorySessionImpl session, Object base, long offset, short value) {
+        try {
+            putShortOpaqueInternal(session, base, offset, value);
+        } catch (ScopedAccessError ex) {
+            throw ex.newRuntimeException();
+        }
+    }
+
+    @ForceInline @Scoped
+    private void putShortOpaqueInternal(MemorySessionImpl session, Object base, long offset, short value) {
+        try {
+            if (session != null) {
+                session.checkValidStateRaw();
+            }
+            UNSAFE.putShortOpaque(base, offset, value);
+        } finally {
+            Reference.reachabilityFence(session);
+        }
+    }
+
+    @ForceInline
+    public short getAndAddShort(MemorySessionImpl session, Object base, long offset, short delta) {
+        try {
+            return getAndAddShortInternal(session, base, offset, delta);
+        } catch (ScopedAccessError ex) {
+            throw ex.newRuntimeException();
+        }
+    }
+
+    @ForceInline @Scoped
+    private short getAndAddShortInternal(MemorySessionImpl session, Object base, long offset, short delta) {
+        try {
+            if (session != null) {
+                session.checkValidStateRaw();
+            }
+            return UNSAFE.getAndAddShort(base, offset, delta);
+        } finally {
+            Reference.reachabilityFence(session);
+        }
+    }
+
+    @ForceInline
+    public short getAndAddShortAcquire(MemorySessionImpl session, Object base, long offset, short delta) {
+        try {
+            return getAndAddShortAcquireInternal(session, base, offset, delta);
+        } catch (ScopedAccessError ex) {
+            throw ex.newRuntimeException();
+        }
+    }
+
+    @ForceInline @Scoped
+    private short getAndAddShortAcquireInternal(MemorySessionImpl session, Object base, long offset, short delta) {
+        try {
+            if (session != null) {
+                session.checkValidStateRaw();
+            }
+            return UNSAFE.getAndAddShortAcquire(base, offset, delta);
+        } finally {
+            Reference.reachabilityFence(session);
+        }
+    }
+
+    @ForceInline
+    public short getAndAddShortRelease(MemorySessionImpl session, Object base, long offset, short delta) {
+        try {
+            return getAndAddShortReleaseInternal(session, base, offset, delta);
+        } catch (ScopedAccessError ex) {
+            throw ex.newRuntimeException();
+        }
+    }
+
+    @ForceInline @Scoped
+    private short getAndAddShortReleaseInternal(MemorySessionImpl session, Object base, long offset, short delta) {
+        try {
+            if (session != null) {
+                session.checkValidStateRaw();
+            }
+            return UNSAFE.getAndAddShortRelease(base, offset, delta);
+        } finally {
+            Reference.reachabilityFence(session);
+        }
+    }
+
+    @ForceInline
+    public short getAndBitwiseOrShort(MemorySessionImpl session, Object base, long offset, short value) {
+        try {
+            return getAndBitwiseOrShortInternal(session, base, offset, value);
+        } catch (ScopedAccessError ex) {
+            throw ex.newRuntimeException();
+        }
+    }
+
+    @ForceInline @Scoped
+    private short getAndBitwiseOrShortInternal(MemorySessionImpl session, Object base, long offset, short value) {
+        try {
+            if (session != null) {
+                session.checkValidStateRaw();
+            }
+            return UNSAFE.getAndBitwiseOrShort(base, offset, value);
+        } finally {
+            Reference.reachabilityFence(session);
+        }
+    }
+
+    @ForceInline
+    public short getAndBitwiseOrShortAcquire(MemorySessionImpl session, Object base, long offset, short value) {
+        try {
+            return getAndBitwiseOrShortAcquireInternal(session, base, offset, value);
+        } catch (ScopedAccessError ex) {
+            throw ex.newRuntimeException();
+        }
+    }
+
+    @ForceInline @Scoped
+    private short getAndBitwiseOrShortAcquireInternal(MemorySessionImpl session, Object base, long offset, short value) {
+        try {
+            if (session != null) {
+                session.checkValidStateRaw();
+            }
+            return UNSAFE.getAndBitwiseOrShortAcquire(base, offset, value);
+        } finally {
+            Reference.reachabilityFence(session);
+        }
+    }
+
+    @ForceInline
+    public short getAndBitwiseOrShortRelease(MemorySessionImpl session, Object base, long offset, short value) {
+        try {
+            return getAndBitwiseOrShortReleaseInternal(session, base, offset, value);
+        } catch (ScopedAccessError ex) {
+            throw ex.newRuntimeException();
+        }
+    }
+
+    @ForceInline @Scoped
+    private short getAndBitwiseOrShortReleaseInternal(MemorySessionImpl session, Object base, long offset, short value) {
+        try {
+            if (session != null) {
+                session.checkValidStateRaw();
+            }
+            return UNSAFE.getAndBitwiseOrShortRelease(base, offset, value);
+        } finally {
+            Reference.reachabilityFence(session);
+        }
+    }
+
+    @ForceInline
+    public short getAndBitwiseAndShort(MemorySessionImpl session, Object base, long offset, short value) {
+        try {
+            return getAndBitwiseAndShortInternal(session, base, offset, value);
+        } catch (ScopedAccessError ex) {
+            throw ex.newRuntimeException();
+        }
+    }
+
+    @ForceInline @Scoped
+    private short getAndBitwiseAndShortInternal(MemorySessionImpl session, Object base, long offset, short value) {
+        try {
+            if (session != null) {
+                session.checkValidStateRaw();
+            }
+            return UNSAFE.getAndBitwiseAndShort(base, offset, value);
+        } finally {
+            Reference.reachabilityFence(session);
+        }
+    }
+
+    @ForceInline
+    public short getAndBitwiseAndShortAcquire(MemorySessionImpl session, Object base, long offset, short value) {
+        try {
+            return getAndBitwiseAndShortAcquireInternal(session, base, offset, value);
+        } catch (ScopedAccessError ex) {
+            throw ex.newRuntimeException();
+        }
+    }
+
+    @ForceInline @Scoped
+    private short getAndBitwiseAndShortAcquireInternal(MemorySessionImpl session, Object base, long offset, short value) {
+        try {
+            if (session != null) {
+                session.checkValidStateRaw();
+            }
+            return UNSAFE.getAndBitwiseAndShortAcquire(base, offset, value);
+        } finally {
+            Reference.reachabilityFence(session);
+        }
+    }
+
+    @ForceInline
+    public short getAndBitwiseAndShortRelease(MemorySessionImpl session, Object base, long offset, short value) {
+        try {
+            return getAndBitwiseAndShortReleaseInternal(session, base, offset, value);
+        } catch (ScopedAccessError ex) {
+            throw ex.newRuntimeException();
+        }
+    }
+
+    @ForceInline @Scoped
+    private short getAndBitwiseAndShortReleaseInternal(MemorySessionImpl session, Object base, long offset, short value) {
+        try {
+            if (session != null) {
+                session.checkValidStateRaw();
+            }
+            return UNSAFE.getAndBitwiseAndShortRelease(base, offset, value);
+        } finally {
+            Reference.reachabilityFence(session);
+        }
+    }
+
+    @ForceInline
+    public short getAndBitwiseXorShort(MemorySessionImpl session, Object base, long offset, short value) {
+        try {
+            return getAndBitwiseXorShortInternal(session, base, offset, value);
+        } catch (ScopedAccessError ex) {
+            throw ex.newRuntimeException();
+        }
+    }
+
+    @ForceInline @Scoped
+    private short getAndBitwiseXorShortInternal(MemorySessionImpl session, Object base, long offset, short value) {
+        try {
+            if (session != null) {
+                session.checkValidStateRaw();
+            }
+            return UNSAFE.getAndBitwiseXorShort(base, offset, value);
+        } finally {
+            Reference.reachabilityFence(session);
+        }
+    }
+
+    @ForceInline
+    public short getAndBitwiseXorShortAcquire(MemorySessionImpl session, Object base, long offset, short value) {
+        try {
+            return getAndBitwiseXorShortAcquireInternal(session, base, offset, value);
+        } catch (ScopedAccessError ex) {
+            throw ex.newRuntimeException();
+        }
+    }
+
+    @ForceInline @Scoped
+    private short getAndBitwiseXorShortAcquireInternal(MemorySessionImpl session, Object base, long offset, short value) {
+        try {
+            if (session != null) {
+                session.checkValidStateRaw();
+            }
+            return UNSAFE.getAndBitwiseXorShortAcquire(base, offset, value);
+        } finally {
+            Reference.reachabilityFence(session);
+        }
+    }
+
+    @ForceInline
+    public short getAndBitwiseXorShortRelease(MemorySessionImpl session, Object base, long offset, short value) {
+        try {
+            return getAndBitwiseXorShortReleaseInternal(session, base, offset, value);
+        } catch (ScopedAccessError ex) {
+            throw ex.newRuntimeException();
+        }
+    }
+
+    @ForceInline @Scoped
+    private short getAndBitwiseXorShortReleaseInternal(MemorySessionImpl session, Object base, long offset, short value) {
+        try {
+            if (session != null) {
+                session.checkValidStateRaw();
+            }
+            return UNSAFE.getAndBitwiseXorShortRelease(base, offset, value);
+        } finally {
+            Reference.reachabilityFence(session);
+        }
+    }
+    @ForceInline
+    public char getChar(MemorySessionImpl session, Object base, long offset) {
+        try {
+            return getCharInternal(session, base, offset);
+        } catch (ScopedAccessError ex) {
+            throw ex.newRuntimeException();
+        }
+    }
+
+    @ForceInline @Scoped
+    private char getCharInternal(MemorySessionImpl session, Object base, long offset) {
+        try {
+            if (session != null) {
+                session.checkValidStateRaw();
+            }
+            return UNSAFE.getChar(base, offset);
+        } finally {
+            Reference.reachabilityFence(session);
+        }
+    }
+
+    @ForceInline
+    public void putChar(MemorySessionImpl session, Object base, long offset, char value) {
+        try {
+            putCharInternal(session, base, offset, value);
+        } catch (ScopedAccessError ex) {
+            throw ex.newRuntimeException();
+        }
+    }
+
+    @ForceInline @Scoped
+    private void putCharInternal(MemorySessionImpl session, Object base, long offset, char value) {
+        try {
+            if (session != null) {
+                session.checkValidStateRaw();
+            }
+            UNSAFE.putChar(base, offset, value);
+        } finally {
+            Reference.reachabilityFence(session);
+        }
+    }
+
+    @ForceInline
+    public char getCharUnaligned(MemorySessionImpl session, Object base, long offset, boolean be) {
+        try {
+            return getCharUnalignedInternal(session, base, offset, be);
+        } catch (ScopedAccessError ex) {
+            throw ex.newRuntimeException();
+        }
+    }
+
+    @ForceInline @Scoped
+    private char getCharUnalignedInternal(MemorySessionImpl session, Object base, long offset, boolean be) {
+        try {
+            if (session != null) {
+                session.checkValidStateRaw();
+            }
+            return UNSAFE.getCharUnaligned(base, offset, be);
+        } finally {
+            Reference.reachabilityFence(session);
+        }
+    }
+
+    @ForceInline
+    public void putCharUnaligned(MemorySessionImpl session, Object base, long offset, char value, boolean be) {
+        try {
+            putCharUnalignedInternal(session, base, offset, value, be);
+        } catch (ScopedAccessError ex) {
+            throw ex.newRuntimeException();
+        }
+    }
+
+    @ForceInline @Scoped
+    private void putCharUnalignedInternal(MemorySessionImpl session, Object base, long offset, char value, boolean be) {
+        try {
+            if (session != null) {
+                session.checkValidStateRaw();
+            }
+            UNSAFE.putCharUnaligned(base, offset, value, be);
+        } finally {
+            Reference.reachabilityFence(session);
+        }
+    }
+
+    @ForceInline
+    public char getCharVolatile(MemorySessionImpl session, Object base, long offset) {
+        try {
+            return getCharVolatileInternal(session, base, offset);
+        } catch (ScopedAccessError ex) {
+            throw ex.newRuntimeException();
+        }
+    }
+
+    @ForceInline @Scoped
+    private char getCharVolatileInternal(MemorySessionImpl session, Object base, long offset) {
+        try {
+            if (session != null) {
+                session.checkValidStateRaw();
+            }
+            return UNSAFE.getCharVolatile(base, offset);
+        } finally {
+            Reference.reachabilityFence(session);
+        }
+    }
+
+    @ForceInline
+    public void putCharVolatile(MemorySessionImpl session, Object base, long offset, char value) {
+        try {
+            putCharVolatileInternal(session, base, offset, value);
+        } catch (ScopedAccessError ex) {
+            throw ex.newRuntimeException();
+        }
+    }
+
+    @ForceInline @Scoped
+    private void putCharVolatileInternal(MemorySessionImpl session, Object base, long offset, char value) {
+        try {
+            if (session != null) {
+                session.checkValidStateRaw();
+            }
+            UNSAFE.putCharVolatile(base, offset, value);
+        } finally {
+            Reference.reachabilityFence(session);
+        }
+    }
+
+    @ForceInline
+    public char getCharAcquire(MemorySessionImpl session, Object base, long offset) {
+        try {
+            return getCharAcquireInternal(session, base, offset);
+        } catch (ScopedAccessError ex) {
+            throw ex.newRuntimeException();
+        }
+    }
+
+    @ForceInline @Scoped
+    private char getCharAcquireInternal(MemorySessionImpl session, Object base, long offset) {
+        try {
+            if (session != null) {
+                session.checkValidStateRaw();
+            }
+            return UNSAFE.getCharAcquire(base, offset);
+        } finally {
+            Reference.reachabilityFence(session);
+        }
+    }
+
+    @ForceInline
+    public void putCharRelease(MemorySessionImpl session, Object base, long offset, char value) {
+        try {
+            putCharReleaseInternal(session, base, offset, value);
+        } catch (ScopedAccessError ex) {
+            throw ex.newRuntimeException();
+        }
+    }
+
+    @ForceInline @Scoped
+    private void putCharReleaseInternal(MemorySessionImpl session, Object base, long offset, char value) {
+        try {
+            if (session != null) {
+                session.checkValidStateRaw();
+            }
+            UNSAFE.putCharRelease(base, offset, value);
+        } finally {
+            Reference.reachabilityFence(session);
+        }
+    }
+
+    @ForceInline
+    public char getCharOpaque(MemorySessionImpl session, Object base, long offset) {
+        try {
+            return getCharOpaqueInternal(session, base, offset);
+        } catch (ScopedAccessError ex) {
+            throw ex.newRuntimeException();
+        }
+    }
+
+    @ForceInline @Scoped
+    private char getCharOpaqueInternal(MemorySessionImpl session, Object base, long offset) {
+        try {
+            if (session != null) {
+                session.checkValidStateRaw();
+            }
+            return UNSAFE.getCharOpaque(base, offset);
+        } finally {
+            Reference.reachabilityFence(session);
+        }
+    }
+    @ForceInline
+    public void putCharOpaque(MemorySessionImpl session, Object base, long offset, char value) {
+        try {
+            putCharOpaqueInternal(session, base, offset, value);
+        } catch (ScopedAccessError ex) {
+            throw ex.newRuntimeException();
+        }
+    }
+
+    @ForceInline @Scoped
+    private void putCharOpaqueInternal(MemorySessionImpl session, Object base, long offset, char value) {
+        try {
+            if (session != null) {
+                session.checkValidStateRaw();
+            }
+            UNSAFE.putCharOpaque(base, offset, value);
+        } finally {
+            Reference.reachabilityFence(session);
+        }
+    }
+
+    @ForceInline
+    public char getAndAddChar(MemorySessionImpl session, Object base, long offset, char delta) {
+        try {
+            return getAndAddCharInternal(session, base, offset, delta);
+        } catch (ScopedAccessError ex) {
+            throw ex.newRuntimeException();
+        }
+    }
+
+    @ForceInline @Scoped
+    private char getAndAddCharInternal(MemorySessionImpl session, Object base, long offset, char delta) {
+        try {
+            if (session != null) {
+                session.checkValidStateRaw();
+            }
+            return UNSAFE.getAndAddChar(base, offset, delta);
+        } finally {
+            Reference.reachabilityFence(session);
+        }
+    }
+
+    @ForceInline
+    public char getAndAddCharAcquire(MemorySessionImpl session, Object base, long offset, char delta) {
+        try {
+            return getAndAddCharAcquireInternal(session, base, offset, delta);
+        } catch (ScopedAccessError ex) {
+            throw ex.newRuntimeException();
+        }
+    }
+
+    @ForceInline @Scoped
+    private char getAndAddCharAcquireInternal(MemorySessionImpl session, Object base, long offset, char delta) {
+        try {
+            if (session != null) {
+                session.checkValidStateRaw();
+            }
+            return UNSAFE.getAndAddCharAcquire(base, offset, delta);
+        } finally {
+            Reference.reachabilityFence(session);
+        }
+    }
+
+    @ForceInline
+    public char getAndAddCharRelease(MemorySessionImpl session, Object base, long offset, char delta) {
+        try {
+            return getAndAddCharReleaseInternal(session, base, offset, delta);
+        } catch (ScopedAccessError ex) {
+            throw ex.newRuntimeException();
+        }
+    }
+
+    @ForceInline @Scoped
+    private char getAndAddCharReleaseInternal(MemorySessionImpl session, Object base, long offset, char delta) {
+        try {
+            if (session != null) {
+                session.checkValidStateRaw();
+            }
+            return UNSAFE.getAndAddCharRelease(base, offset, delta);
+        } finally {
+            Reference.reachabilityFence(session);
+        }
+    }
+
+    @ForceInline
+    public char getAndBitwiseOrChar(MemorySessionImpl session, Object base, long offset, char value) {
+        try {
+            return getAndBitwiseOrCharInternal(session, base, offset, value);
+        } catch (ScopedAccessError ex) {
+            throw ex.newRuntimeException();
+        }
+    }
+
+    @ForceInline @Scoped
+    private char getAndBitwiseOrCharInternal(MemorySessionImpl session, Object base, long offset, char value) {
+        try {
+            if (session != null) {
+                session.checkValidStateRaw();
+            }
+            return UNSAFE.getAndBitwiseOrChar(base, offset, value);
+        } finally {
+            Reference.reachabilityFence(session);
+        }
+    }
+
+    @ForceInline
+    public char getAndBitwiseOrCharAcquire(MemorySessionImpl session, Object base, long offset, char value) {
+        try {
+            return getAndBitwiseOrCharAcquireInternal(session, base, offset, value);
+        } catch (ScopedAccessError ex) {
+            throw ex.newRuntimeException();
+        }
+    }
+
+    @ForceInline @Scoped
+    private char getAndBitwiseOrCharAcquireInternal(MemorySessionImpl session, Object base, long offset, char value) {
+        try {
+            if (session != null) {
+                session.checkValidStateRaw();
+            }
+            return UNSAFE.getAndBitwiseOrCharAcquire(base, offset, value);
+        } finally {
+            Reference.reachabilityFence(session);
+        }
+    }
+
+    @ForceInline
+    public char getAndBitwiseOrCharRelease(MemorySessionImpl session, Object base, long offset, char value) {
+        try {
+            return getAndBitwiseOrCharReleaseInternal(session, base, offset, value);
+        } catch (ScopedAccessError ex) {
+            throw ex.newRuntimeException();
+        }
+    }
+
+    @ForceInline @Scoped
+    private char getAndBitwiseOrCharReleaseInternal(MemorySessionImpl session, Object base, long offset, char value) {
+        try {
+            if (session != null) {
+                session.checkValidStateRaw();
+            }
+            return UNSAFE.getAndBitwiseOrCharRelease(base, offset, value);
+        } finally {
+            Reference.reachabilityFence(session);
+        }
+    }
+
+    @ForceInline
+    public char getAndBitwiseAndChar(MemorySessionImpl session, Object base, long offset, char value) {
+        try {
+            return getAndBitwiseAndCharInternal(session, base, offset, value);
+        } catch (ScopedAccessError ex) {
+            throw ex.newRuntimeException();
+        }
+    }
+
+    @ForceInline @Scoped
+    private char getAndBitwiseAndCharInternal(MemorySessionImpl session, Object base, long offset, char value) {
+        try {
+            if (session != null) {
+                session.checkValidStateRaw();
+            }
+            return UNSAFE.getAndBitwiseAndChar(base, offset, value);
+        } finally {
+            Reference.reachabilityFence(session);
+        }
+    }
+
+    @ForceInline
+    public char getAndBitwiseAndCharAcquire(MemorySessionImpl session, Object base, long offset, char value) {
+        try {
+            return getAndBitwiseAndCharAcquireInternal(session, base, offset, value);
+        } catch (ScopedAccessError ex) {
+            throw ex.newRuntimeException();
+        }
+    }
+
+    @ForceInline @Scoped
+    private char getAndBitwiseAndCharAcquireInternal(MemorySessionImpl session, Object base, long offset, char value) {
+        try {
+            if (session != null) {
+                session.checkValidStateRaw();
+            }
+            return UNSAFE.getAndBitwiseAndCharAcquire(base, offset, value);
+        } finally {
+            Reference.reachabilityFence(session);
+        }
+    }
+
+    @ForceInline
+    public char getAndBitwiseAndCharRelease(MemorySessionImpl session, Object base, long offset, char value) {
+        try {
+            return getAndBitwiseAndCharReleaseInternal(session, base, offset, value);
+        } catch (ScopedAccessError ex) {
+            throw ex.newRuntimeException();
+        }
+    }
+
+    @ForceInline @Scoped
+    private char getAndBitwiseAndCharReleaseInternal(MemorySessionImpl session, Object base, long offset, char value) {
+        try {
+            if (session != null) {
+                session.checkValidStateRaw();
+            }
+            return UNSAFE.getAndBitwiseAndCharRelease(base, offset, value);
+        } finally {
+            Reference.reachabilityFence(session);
+        }
+    }
+
+    @ForceInline
+    public char getAndBitwiseXorChar(MemorySessionImpl session, Object base, long offset, char value) {
+        try {
+            return getAndBitwiseXorCharInternal(session, base, offset, value);
+        } catch (ScopedAccessError ex) {
+            throw ex.newRuntimeException();
+        }
+    }
+
+    @ForceInline @Scoped
+    private char getAndBitwiseXorCharInternal(MemorySessionImpl session, Object base, long offset, char value) {
+        try {
+            if (session != null) {
+                session.checkValidStateRaw();
+            }
+            return UNSAFE.getAndBitwiseXorChar(base, offset, value);
+        } finally {
+            Reference.reachabilityFence(session);
+        }
+    }
+
+    @ForceInline
+    public char getAndBitwiseXorCharAcquire(MemorySessionImpl session, Object base, long offset, char value) {
+        try {
+            return getAndBitwiseXorCharAcquireInternal(session, base, offset, value);
+        } catch (ScopedAccessError ex) {
+            throw ex.newRuntimeException();
+        }
+    }
+
+    @ForceInline @Scoped
+    private char getAndBitwiseXorCharAcquireInternal(MemorySessionImpl session, Object base, long offset, char value) {
+        try {
+            if (session != null) {
+                session.checkValidStateRaw();
+            }
+            return UNSAFE.getAndBitwiseXorCharAcquire(base, offset, value);
+        } finally {
+            Reference.reachabilityFence(session);
+        }
+    }
+
+    @ForceInline
+    public char getAndBitwiseXorCharRelease(MemorySessionImpl session, Object base, long offset, char value) {
+        try {
+            return getAndBitwiseXorCharReleaseInternal(session, base, offset, value);
+        } catch (ScopedAccessError ex) {
+            throw ex.newRuntimeException();
+        }
+    }
+
+    @ForceInline @Scoped
+    private char getAndBitwiseXorCharReleaseInternal(MemorySessionImpl session, Object base, long offset, char value) {
+        try {
+            if (session != null) {
+                session.checkValidStateRaw();
+            }
+            return UNSAFE.getAndBitwiseXorCharRelease(base, offset, value);
+        } finally {
+            Reference.reachabilityFence(session);
+        }
+    }
+    @ForceInline
+    public int getInt(MemorySessionImpl session, Object base, long offset) {
+        try {
+            return getIntInternal(session, base, offset);
+        } catch (ScopedAccessError ex) {
+            throw ex.newRuntimeException();
+        }
+    }
+
+    @ForceInline @Scoped
+    private int getIntInternal(MemorySessionImpl session, Object base, long offset) {
+        try {
+            if (session != null) {
+                session.checkValidStateRaw();
+            }
+            return UNSAFE.getInt(base, offset);
+        } finally {
+            Reference.reachabilityFence(session);
+        }
+    }
+
+    @ForceInline
+    public void putInt(MemorySessionImpl session, Object base, long offset, int value) {
+        try {
+            putIntInternal(session, base, offset, value);
+        } catch (ScopedAccessError ex) {
+            throw ex.newRuntimeException();
+        }
+    }
+
+    @ForceInline @Scoped
+    private void putIntInternal(MemorySessionImpl session, Object base, long offset, int value) {
+        try {
+            if (session != null) {
+                session.checkValidStateRaw();
+            }
+            UNSAFE.putInt(base, offset, value);
+        } finally {
+            Reference.reachabilityFence(session);
+        }
+    }
+
+    @ForceInline
+    public int getIntUnaligned(MemorySessionImpl session, Object base, long offset, boolean be) {
+        try {
+            return getIntUnalignedInternal(session, base, offset, be);
+        } catch (ScopedAccessError ex) {
+            throw ex.newRuntimeException();
+        }
+    }
+
+    @ForceInline @Scoped
+    private int getIntUnalignedInternal(MemorySessionImpl session, Object base, long offset, boolean be) {
+        try {
+            if (session != null) {
+                session.checkValidStateRaw();
+            }
+            return UNSAFE.getIntUnaligned(base, offset, be);
+        } finally {
+            Reference.reachabilityFence(session);
+        }
+    }
+
+    @ForceInline
+    public void putIntUnaligned(MemorySessionImpl session, Object base, long offset, int value, boolean be) {
+        try {
+            putIntUnalignedInternal(session, base, offset, value, be);
+        } catch (ScopedAccessError ex) {
+            throw ex.newRuntimeException();
+        }
+    }
+
+    @ForceInline @Scoped
+    private void putIntUnalignedInternal(MemorySessionImpl session, Object base, long offset, int value, boolean be) {
+        try {
+            if (session != null) {
+                session.checkValidStateRaw();
+            }
+            UNSAFE.putIntUnaligned(base, offset, value, be);
+        } finally {
+            Reference.reachabilityFence(session);
+        }
+    }
+
+    @ForceInline
+    public int getIntVolatile(MemorySessionImpl session, Object base, long offset) {
+        try {
+            return getIntVolatileInternal(session, base, offset);
+        } catch (ScopedAccessError ex) {
+            throw ex.newRuntimeException();
+        }
+    }
+
+    @ForceInline @Scoped
+    private int getIntVolatileInternal(MemorySessionImpl session, Object base, long offset) {
+        try {
+            if (session != null) {
+                session.checkValidStateRaw();
+            }
+            return UNSAFE.getIntVolatile(base, offset);
+        } finally {
+            Reference.reachabilityFence(session);
+        }
+    }
+
+    @ForceInline
+    public void putIntVolatile(MemorySessionImpl session, Object base, long offset, int value) {
+        try {
+            putIntVolatileInternal(session, base, offset, value);
+        } catch (ScopedAccessError ex) {
+            throw ex.newRuntimeException();
+        }
+    }
+
+    @ForceInline @Scoped
+    private void putIntVolatileInternal(MemorySessionImpl session, Object base, long offset, int value) {
+        try {
+            if (session != null) {
+                session.checkValidStateRaw();
+            }
+            UNSAFE.putIntVolatile(base, offset, value);
+        } finally {
+            Reference.reachabilityFence(session);
+        }
+    }
+
+    @ForceInline
+    public int getIntAcquire(MemorySessionImpl session, Object base, long offset) {
+        try {
+            return getIntAcquireInternal(session, base, offset);
+        } catch (ScopedAccessError ex) {
+            throw ex.newRuntimeException();
+        }
+    }
+
+    @ForceInline @Scoped
+    private int getIntAcquireInternal(MemorySessionImpl session, Object base, long offset) {
+        try {
+            if (session != null) {
+                session.checkValidStateRaw();
+            }
+            return UNSAFE.getIntAcquire(base, offset);
+        } finally {
+            Reference.reachabilityFence(session);
+        }
+    }
+
+    @ForceInline
+    public void putIntRelease(MemorySessionImpl session, Object base, long offset, int value) {
+        try {
+            putIntReleaseInternal(session, base, offset, value);
+        } catch (ScopedAccessError ex) {
+            throw ex.newRuntimeException();
+        }
+    }
+
+    @ForceInline @Scoped
+    private void putIntReleaseInternal(MemorySessionImpl session, Object base, long offset, int value) {
+        try {
+            if (session != null) {
+                session.checkValidStateRaw();
+            }
+            UNSAFE.putIntRelease(base, offset, value);
+        } finally {
+            Reference.reachabilityFence(session);
+        }
+    }
+
+    @ForceInline
+    public int getIntOpaque(MemorySessionImpl session, Object base, long offset) {
+        try {
+            return getIntOpaqueInternal(session, base, offset);
+        } catch (ScopedAccessError ex) {
+            throw ex.newRuntimeException();
+        }
+    }
+
+    @ForceInline @Scoped
+    private int getIntOpaqueInternal(MemorySessionImpl session, Object base, long offset) {
+        try {
+            if (session != null) {
+                session.checkValidStateRaw();
+            }
+            return UNSAFE.getIntOpaque(base, offset);
+        } finally {
+            Reference.reachabilityFence(session);
+        }
+    }
+    @ForceInline
+    public void putIntOpaque(MemorySessionImpl session, Object base, long offset, int value) {
+        try {
+            putIntOpaqueInternal(session, base, offset, value);
+        } catch (ScopedAccessError ex) {
+            throw ex.newRuntimeException();
+        }
+    }
+
+    @ForceInline @Scoped
+    private void putIntOpaqueInternal(MemorySessionImpl session, Object base, long offset, int value) {
+        try {
+            if (session != null) {
+                session.checkValidStateRaw();
+            }
+            UNSAFE.putIntOpaque(base, offset, value);
+        } finally {
+            Reference.reachabilityFence(session);
+        }
+    }
+    @ForceInline
+    public boolean compareAndSetInt(MemorySessionImpl session, Object base, long offset, int expected, int value) {
+        try {
+            return compareAndSetIntInternal(session, base, offset, expected, value);
+        } catch (ScopedAccessError ex) {
+            throw ex.newRuntimeException();
+        }
+    }
+
+    @ForceInline @Scoped
+    private boolean compareAndSetIntInternal(MemorySessionImpl session, Object base, long offset, int expected, int value) {
+        try {
+            if (session != null) {
+                session.checkValidStateRaw();
+            }
+            return UNSAFE.compareAndSetInt(base, offset, expected, value);
+        } finally {
+            Reference.reachabilityFence(session);
+        }
+    }
+
+    @ForceInline
+    public int compareAndExchangeInt(MemorySessionImpl session, Object base, long offset, int expected, int value) {
+        try {
+            return compareAndExchangeIntInternal(session, base, offset, expected, value);
+        } catch (ScopedAccessError ex) {
+            throw ex.newRuntimeException();
+        }
+    }
+
+    @ForceInline @Scoped
+    private int compareAndExchangeIntInternal(MemorySessionImpl session, Object base, long offset, int expected, int value) {
+        try {
+            if (session != null) {
+                session.checkValidStateRaw();
+            }
+            return UNSAFE.compareAndExchangeInt(base, offset, expected, value);
+        } finally {
+            Reference.reachabilityFence(session);
+        }
+    }
+
+    @ForceInline
+    public int compareAndExchangeIntAcquire(MemorySessionImpl session, Object base, long offset, int expected, int value) {
+        try {
+            return compareAndExchangeIntAcquireInternal(session, base, offset, expected, value);
+        } catch (ScopedAccessError ex) {
+            throw ex.newRuntimeException();
+        }
+    }
+
+    @ForceInline @Scoped
+    private int compareAndExchangeIntAcquireInternal(MemorySessionImpl session, Object base, long offset, int expected, int value) {
+        try {
+            if (session != null) {
+                session.checkValidStateRaw();
+            }
+            return UNSAFE.compareAndExchangeIntAcquire(base, offset, expected, value);
+        } finally {
+            Reference.reachabilityFence(session);
+        }
+    }
+
+    @ForceInline
+    public int compareAndExchangeIntRelease(MemorySessionImpl session, Object base, long offset, int expected, int value) {
+        try {
+            return compareAndExchangeIntReleaseInternal(session, base, offset, expected, value);
+        } catch (ScopedAccessError ex) {
+            throw ex.newRuntimeException();
+        }
+    }
+
+    @ForceInline @Scoped
+    private int compareAndExchangeIntReleaseInternal(MemorySessionImpl session, Object base, long offset, int expected, int value) {
+        try {
+            if (session != null) {
+                session.checkValidStateRaw();
+            }
+            return UNSAFE.compareAndExchangeIntRelease(base, offset, expected, value);
+        } finally {
+            Reference.reachabilityFence(session);
+        }
+    }
+
+    @ForceInline
+    public boolean weakCompareAndSetIntPlain(MemorySessionImpl session, Object base, long offset, int expected, int value) {
+        try {
+            return weakCompareAndSetIntPlainInternal(session, base, offset, expected, value);
+        } catch (ScopedAccessError ex) {
+            throw ex.newRuntimeException();
+        }
+    }
+
+    @ForceInline @Scoped
+    private boolean weakCompareAndSetIntPlainInternal(MemorySessionImpl session, Object base, long offset, int expected, int value) {
+        try {
+            if (session != null) {
+                session.checkValidStateRaw();
+            }
+            return UNSAFE.weakCompareAndSetIntPlain(base, offset, expected, value);
+        } finally {
+            Reference.reachabilityFence(session);
+        }
+    }
+
+    @ForceInline
+    public boolean weakCompareAndSetInt(MemorySessionImpl session, Object base, long offset, int expected, int value) {
+        try {
+            return weakCompareAndSetIntInternal(session, base, offset, expected, value);
+        } catch (ScopedAccessError ex) {
+            throw ex.newRuntimeException();
+        }
+    }
+
+    @ForceInline @Scoped
+    private boolean weakCompareAndSetIntInternal(MemorySessionImpl session, Object base, long offset, int expected, int value) {
+        try {
+            if (session != null) {
+                session.checkValidStateRaw();
+            }
+            return UNSAFE.weakCompareAndSetInt(base, offset, expected, value);
+        } finally {
+            Reference.reachabilityFence(session);
+        }
+    }
+
+    @ForceInline
+    public boolean weakCompareAndSetIntAcquire(MemorySessionImpl session, Object base, long offset, int expected, int value) {
+        try {
+            return weakCompareAndSetIntAcquireInternal(session, base, offset, expected, value);
+        } catch (ScopedAccessError ex) {
+            throw ex.newRuntimeException();
+        }
+    }
+
+    @ForceInline @Scoped
+    private boolean weakCompareAndSetIntAcquireInternal(MemorySessionImpl session, Object base, long offset, int expected, int value) {
+        try {
+            if (session != null) {
+                session.checkValidStateRaw();
+            }
+            return UNSAFE.weakCompareAndSetIntAcquire(base, offset, expected, value);
+        } finally {
+            Reference.reachabilityFence(session);
+        }
+    }
+
+    @ForceInline
+    public boolean weakCompareAndSetIntRelease(MemorySessionImpl session, Object base, long offset, int expected, int value) {
+        try {
+            return weakCompareAndSetIntReleaseInternal(session, base, offset, expected, value);
+        } catch (ScopedAccessError ex) {
+            throw ex.newRuntimeException();
+        }
+    }
+
+    @ForceInline @Scoped
+    private boolean weakCompareAndSetIntReleaseInternal(MemorySessionImpl session, Object base, long offset, int expected, int value) {
+        try {
+            if (session != null) {
+                session.checkValidStateRaw();
+            }
+            return UNSAFE.weakCompareAndSetIntRelease(base, offset, expected, value);
+        } finally {
+            Reference.reachabilityFence(session);
+        }
+    }
+
+    @ForceInline
+    public int getAndSetInt(MemorySessionImpl session, Object base, long offset, int value) {
+        try {
+            return getAndSetIntInternal(session, base, offset, value);
+        } catch (ScopedAccessError ex) {
+            throw ex.newRuntimeException();
+        }
+    }
+
+    @ForceInline @Scoped
+    private int getAndSetIntInternal(MemorySessionImpl session, Object base, long offset, int value) {
+        try {
+            if (session != null) {
+                session.checkValidStateRaw();
+            }
+            return UNSAFE.getAndSetInt(base, offset, value);
+        } finally {
+            Reference.reachabilityFence(session);
+        }
+    }
+
+    @ForceInline
+    public int getAndSetIntAcquire(MemorySessionImpl session, Object base, long offset, int value) {
+        try {
+            return getAndSetIntAcquireInternal(session, base, offset, value);
+        } catch (ScopedAccessError ex) {
+            throw ex.newRuntimeException();
+        }
+    }
+
+    @ForceInline @Scoped
+    private int getAndSetIntAcquireInternal(MemorySessionImpl session, Object base, long offset, int value) {
+        try {
+            if (session != null) {
+                session.checkValidStateRaw();
+            }
+            return UNSAFE.getAndSetIntAcquire(base, offset, value);
+        } finally {
+            Reference.reachabilityFence(session);
+        }
+    }
+
+    @ForceInline
+    public int getAndSetIntRelease(MemorySessionImpl session, Object base, long offset, int value) {
+        try {
+            return getAndSetIntReleaseInternal(session, base, offset, value);
+        } catch (ScopedAccessError ex) {
+            throw ex.newRuntimeException();
+        }
+    }
+
+    @ForceInline @Scoped
+    private int getAndSetIntReleaseInternal(MemorySessionImpl session, Object base, long offset, int value) {
+        try {
+            if (session != null) {
+                session.checkValidStateRaw();
+            }
+            return UNSAFE.getAndSetIntRelease(base, offset, value);
+        } finally {
+            Reference.reachabilityFence(session);
+        }
+    }
+
+    @ForceInline
+    public int getAndAddInt(MemorySessionImpl session, Object base, long offset, int delta) {
+        try {
+            return getAndAddIntInternal(session, base, offset, delta);
+        } catch (ScopedAccessError ex) {
+            throw ex.newRuntimeException();
+        }
+    }
+
+    @ForceInline @Scoped
+    private int getAndAddIntInternal(MemorySessionImpl session, Object base, long offset, int delta) {
+        try {
+            if (session != null) {
+                session.checkValidStateRaw();
+            }
+            return UNSAFE.getAndAddInt(base, offset, delta);
+        } finally {
+            Reference.reachabilityFence(session);
+        }
+    }
+
+    @ForceInline
+    public int getAndAddIntAcquire(MemorySessionImpl session, Object base, long offset, int delta) {
+        try {
+            return getAndAddIntAcquireInternal(session, base, offset, delta);
+        } catch (ScopedAccessError ex) {
+            throw ex.newRuntimeException();
+        }
+    }
+
+    @ForceInline @Scoped
+    private int getAndAddIntAcquireInternal(MemorySessionImpl session, Object base, long offset, int delta) {
+        try {
+            if (session != null) {
+                session.checkValidStateRaw();
+            }
+            return UNSAFE.getAndAddIntAcquire(base, offset, delta);
+        } finally {
+            Reference.reachabilityFence(session);
+        }
+    }
+
+    @ForceInline
+    public int getAndAddIntRelease(MemorySessionImpl session, Object base, long offset, int delta) {
+        try {
+            return getAndAddIntReleaseInternal(session, base, offset, delta);
+        } catch (ScopedAccessError ex) {
+            throw ex.newRuntimeException();
+        }
+    }
+
+    @ForceInline @Scoped
+    private int getAndAddIntReleaseInternal(MemorySessionImpl session, Object base, long offset, int delta) {
+        try {
+            if (session != null) {
+                session.checkValidStateRaw();
+            }
+            return UNSAFE.getAndAddIntRelease(base, offset, delta);
+        } finally {
+            Reference.reachabilityFence(session);
+        }
+    }
+
+    @ForceInline
+    public int getAndBitwiseOrInt(MemorySessionImpl session, Object base, long offset, int value) {
+        try {
+            return getAndBitwiseOrIntInternal(session, base, offset, value);
+        } catch (ScopedAccessError ex) {
+            throw ex.newRuntimeException();
+        }
+    }
+
+    @ForceInline @Scoped
+    private int getAndBitwiseOrIntInternal(MemorySessionImpl session, Object base, long offset, int value) {
+        try {
+            if (session != null) {
+                session.checkValidStateRaw();
+            }
+            return UNSAFE.getAndBitwiseOrInt(base, offset, value);
+        } finally {
+            Reference.reachabilityFence(session);
+        }
+    }
+
+    @ForceInline
+    public int getAndBitwiseOrIntAcquire(MemorySessionImpl session, Object base, long offset, int value) {
+        try {
+            return getAndBitwiseOrIntAcquireInternal(session, base, offset, value);
+        } catch (ScopedAccessError ex) {
+            throw ex.newRuntimeException();
+        }
+    }
+
+    @ForceInline @Scoped
+    private int getAndBitwiseOrIntAcquireInternal(MemorySessionImpl session, Object base, long offset, int value) {
+        try {
+            if (session != null) {
+                session.checkValidStateRaw();
+            }
+            return UNSAFE.getAndBitwiseOrIntAcquire(base, offset, value);
+        } finally {
+            Reference.reachabilityFence(session);
+        }
+    }
+
+    @ForceInline
+    public int getAndBitwiseOrIntRelease(MemorySessionImpl session, Object base, long offset, int value) {
+        try {
+            return getAndBitwiseOrIntReleaseInternal(session, base, offset, value);
+        } catch (ScopedAccessError ex) {
+            throw ex.newRuntimeException();
+        }
+    }
+
+    @ForceInline @Scoped
+    private int getAndBitwiseOrIntReleaseInternal(MemorySessionImpl session, Object base, long offset, int value) {
+        try {
+            if (session != null) {
+                session.checkValidStateRaw();
+            }
+            return UNSAFE.getAndBitwiseOrIntRelease(base, offset, value);
+        } finally {
+            Reference.reachabilityFence(session);
+        }
+    }
+
+    @ForceInline
+    public int getAndBitwiseAndInt(MemorySessionImpl session, Object base, long offset, int value) {
+        try {
+            return getAndBitwiseAndIntInternal(session, base, offset, value);
+        } catch (ScopedAccessError ex) {
+            throw ex.newRuntimeException();
+        }
+    }
+
+    @ForceInline @Scoped
+    private int getAndBitwiseAndIntInternal(MemorySessionImpl session, Object base, long offset, int value) {
+        try {
+            if (session != null) {
+                session.checkValidStateRaw();
+            }
+            return UNSAFE.getAndBitwiseAndInt(base, offset, value);
+        } finally {
+            Reference.reachabilityFence(session);
+        }
+    }
+
+    @ForceInline
+    public int getAndBitwiseAndIntAcquire(MemorySessionImpl session, Object base, long offset, int value) {
+        try {
+            return getAndBitwiseAndIntAcquireInternal(session, base, offset, value);
+        } catch (ScopedAccessError ex) {
+            throw ex.newRuntimeException();
+        }
+    }
+
+    @ForceInline @Scoped
+    private int getAndBitwiseAndIntAcquireInternal(MemorySessionImpl session, Object base, long offset, int value) {
+        try {
+            if (session != null) {
+                session.checkValidStateRaw();
+            }
+            return UNSAFE.getAndBitwiseAndIntAcquire(base, offset, value);
+        } finally {
+            Reference.reachabilityFence(session);
+        }
+    }
+
+    @ForceInline
+    public int getAndBitwiseAndIntRelease(MemorySessionImpl session, Object base, long offset, int value) {
+        try {
+            return getAndBitwiseAndIntReleaseInternal(session, base, offset, value);
+        } catch (ScopedAccessError ex) {
+            throw ex.newRuntimeException();
+        }
+    }
+
+    @ForceInline @Scoped
+    private int getAndBitwiseAndIntReleaseInternal(MemorySessionImpl session, Object base, long offset, int value) {
+        try {
+            if (session != null) {
+                session.checkValidStateRaw();
+            }
+            return UNSAFE.getAndBitwiseAndIntRelease(base, offset, value);
+        } finally {
+            Reference.reachabilityFence(session);
+        }
+    }
+
+    @ForceInline
+    public int getAndBitwiseXorInt(MemorySessionImpl session, Object base, long offset, int value) {
+        try {
+            return getAndBitwiseXorIntInternal(session, base, offset, value);
+        } catch (ScopedAccessError ex) {
+            throw ex.newRuntimeException();
+        }
+    }
+
+    @ForceInline @Scoped
+    private int getAndBitwiseXorIntInternal(MemorySessionImpl session, Object base, long offset, int value) {
+        try {
+            if (session != null) {
+                session.checkValidStateRaw();
+            }
+            return UNSAFE.getAndBitwiseXorInt(base, offset, value);
+        } finally {
+            Reference.reachabilityFence(session);
+        }
+    }
+
+    @ForceInline
+    public int getAndBitwiseXorIntAcquire(MemorySessionImpl session, Object base, long offset, int value) {
+        try {
+            return getAndBitwiseXorIntAcquireInternal(session, base, offset, value);
+        } catch (ScopedAccessError ex) {
+            throw ex.newRuntimeException();
+        }
+    }
+
+    @ForceInline @Scoped
+    private int getAndBitwiseXorIntAcquireInternal(MemorySessionImpl session, Object base, long offset, int value) {
+        try {
+            if (session != null) {
+                session.checkValidStateRaw();
+            }
+            return UNSAFE.getAndBitwiseXorIntAcquire(base, offset, value);
+        } finally {
+            Reference.reachabilityFence(session);
+        }
+    }
+
+    @ForceInline
+    public int getAndBitwiseXorIntRelease(MemorySessionImpl session, Object base, long offset, int value) {
+        try {
+            return getAndBitwiseXorIntReleaseInternal(session, base, offset, value);
+        } catch (ScopedAccessError ex) {
+            throw ex.newRuntimeException();
+        }
+    }
+
+    @ForceInline @Scoped
+    private int getAndBitwiseXorIntReleaseInternal(MemorySessionImpl session, Object base, long offset, int value) {
+        try {
+            if (session != null) {
+                session.checkValidStateRaw();
+            }
+            return UNSAFE.getAndBitwiseXorIntRelease(base, offset, value);
+        } finally {
+            Reference.reachabilityFence(session);
+        }
+    }
+    @ForceInline
+    public long getLong(MemorySessionImpl session, Object base, long offset) {
+        try {
+            return getLongInternal(session, base, offset);
+        } catch (ScopedAccessError ex) {
+            throw ex.newRuntimeException();
+        }
+    }
+
+    @ForceInline @Scoped
+    private long getLongInternal(MemorySessionImpl session, Object base, long offset) {
+        try {
+            if (session != null) {
+                session.checkValidStateRaw();
+            }
+            return UNSAFE.getLong(base, offset);
+        } finally {
+            Reference.reachabilityFence(session);
+        }
+    }
+
+    @ForceInline
+    public void putLong(MemorySessionImpl session, Object base, long offset, long value) {
+        try {
+            putLongInternal(session, base, offset, value);
+        } catch (ScopedAccessError ex) {
+            throw ex.newRuntimeException();
+        }
+    }
+
+    @ForceInline @Scoped
+    private void putLongInternal(MemorySessionImpl session, Object base, long offset, long value) {
+        try {
+            if (session != null) {
+                session.checkValidStateRaw();
+            }
+            UNSAFE.putLong(base, offset, value);
+        } finally {
+            Reference.reachabilityFence(session);
+        }
+    }
+
+    @ForceInline
+    public long getLongUnaligned(MemorySessionImpl session, Object base, long offset, boolean be) {
+        try {
+            return getLongUnalignedInternal(session, base, offset, be);
+        } catch (ScopedAccessError ex) {
+            throw ex.newRuntimeException();
+        }
+    }
+
+    @ForceInline @Scoped
+    private long getLongUnalignedInternal(MemorySessionImpl session, Object base, long offset, boolean be) {
+        try {
+            if (session != null) {
+                session.checkValidStateRaw();
+            }
+            return UNSAFE.getLongUnaligned(base, offset, be);
+        } finally {
+            Reference.reachabilityFence(session);
+        }
+    }
+
+    @ForceInline
+    public void putLongUnaligned(MemorySessionImpl session, Object base, long offset, long value, boolean be) {
+        try {
+            putLongUnalignedInternal(session, base, offset, value, be);
+        } catch (ScopedAccessError ex) {
+            throw ex.newRuntimeException();
+        }
+    }
+
+    @ForceInline @Scoped
+    private void putLongUnalignedInternal(MemorySessionImpl session, Object base, long offset, long value, boolean be) {
+        try {
+            if (session != null) {
+                session.checkValidStateRaw();
+            }
+            UNSAFE.putLongUnaligned(base, offset, value, be);
+        } finally {
+            Reference.reachabilityFence(session);
+        }
+    }
+
+    @ForceInline
+    public long getLongVolatile(MemorySessionImpl session, Object base, long offset) {
+        try {
+            return getLongVolatileInternal(session, base, offset);
+        } catch (ScopedAccessError ex) {
+            throw ex.newRuntimeException();
+        }
+    }
+
+    @ForceInline @Scoped
+    private long getLongVolatileInternal(MemorySessionImpl session, Object base, long offset) {
+        try {
+            if (session != null) {
+                session.checkValidStateRaw();
+            }
+            return UNSAFE.getLongVolatile(base, offset);
+        } finally {
+            Reference.reachabilityFence(session);
+        }
+    }
+
+    @ForceInline
+    public void putLongVolatile(MemorySessionImpl session, Object base, long offset, long value) {
+        try {
+            putLongVolatileInternal(session, base, offset, value);
+        } catch (ScopedAccessError ex) {
+            throw ex.newRuntimeException();
+        }
+    }
+
+    @ForceInline @Scoped
+    private void putLongVolatileInternal(MemorySessionImpl session, Object base, long offset, long value) {
+        try {
+            if (session != null) {
+                session.checkValidStateRaw();
+            }
+            UNSAFE.putLongVolatile(base, offset, value);
+        } finally {
+            Reference.reachabilityFence(session);
+        }
+    }
+
+    @ForceInline
+    public long getLongAcquire(MemorySessionImpl session, Object base, long offset) {
+        try {
+            return getLongAcquireInternal(session, base, offset);
+        } catch (ScopedAccessError ex) {
+            throw ex.newRuntimeException();
+        }
+    }
+
+    @ForceInline @Scoped
+    private long getLongAcquireInternal(MemorySessionImpl session, Object base, long offset) {
+        try {
+            if (session != null) {
+                session.checkValidStateRaw();
+            }
+            return UNSAFE.getLongAcquire(base, offset);
+        } finally {
+            Reference.reachabilityFence(session);
+        }
+    }
+
+    @ForceInline
+    public void putLongRelease(MemorySessionImpl session, Object base, long offset, long value) {
+        try {
+            putLongReleaseInternal(session, base, offset, value);
+        } catch (ScopedAccessError ex) {
+            throw ex.newRuntimeException();
+        }
+    }
+
+    @ForceInline @Scoped
+    private void putLongReleaseInternal(MemorySessionImpl session, Object base, long offset, long value) {
+        try {
+            if (session != null) {
+                session.checkValidStateRaw();
+            }
+            UNSAFE.putLongRelease(base, offset, value);
+        } finally {
+            Reference.reachabilityFence(session);
+        }
+    }
+
+    @ForceInline
+    public long getLongOpaque(MemorySessionImpl session, Object base, long offset) {
+        try {
+            return getLongOpaqueInternal(session, base, offset);
+        } catch (ScopedAccessError ex) {
+            throw ex.newRuntimeException();
+        }
+    }
+
+    @ForceInline @Scoped
+    private long getLongOpaqueInternal(MemorySessionImpl session, Object base, long offset) {
+        try {
+            if (session != null) {
+                session.checkValidStateRaw();
+            }
+            return UNSAFE.getLongOpaque(base, offset);
+        } finally {
+            Reference.reachabilityFence(session);
+        }
+    }
+    @ForceInline
+    public void putLongOpaque(MemorySessionImpl session, Object base, long offset, long value) {
+        try {
+            putLongOpaqueInternal(session, base, offset, value);
+        } catch (ScopedAccessError ex) {
+            throw ex.newRuntimeException();
+        }
+    }
+
+    @ForceInline @Scoped
+    private void putLongOpaqueInternal(MemorySessionImpl session, Object base, long offset, long value) {
+        try {
+            if (session != null) {
+                session.checkValidStateRaw();
+            }
+            UNSAFE.putLongOpaque(base, offset, value);
+        } finally {
+            Reference.reachabilityFence(session);
+        }
+    }
+    @ForceInline
+    public boolean compareAndSetLong(MemorySessionImpl session, Object base, long offset, long expected, long value) {
+        try {
+            return compareAndSetLongInternal(session, base, offset, expected, value);
+        } catch (ScopedAccessError ex) {
+            throw ex.newRuntimeException();
+        }
+    }
+
+    @ForceInline @Scoped
+    private boolean compareAndSetLongInternal(MemorySessionImpl session, Object base, long offset, long expected, long value) {
+        try {
+            if (session != null) {
+                session.checkValidStateRaw();
+            }
+            return UNSAFE.compareAndSetLong(base, offset, expected, value);
+        } finally {
+            Reference.reachabilityFence(session);
+        }
+    }
+
+    @ForceInline
+    public long compareAndExchangeLong(MemorySessionImpl session, Object base, long offset, long expected, long value) {
+        try {
+            return compareAndExchangeLongInternal(session, base, offset, expected, value);
+        } catch (ScopedAccessError ex) {
+            throw ex.newRuntimeException();
+        }
+    }
+
+    @ForceInline @Scoped
+    private long compareAndExchangeLongInternal(MemorySessionImpl session, Object base, long offset, long expected, long value) {
+        try {
+            if (session != null) {
+                session.checkValidStateRaw();
+            }
+            return UNSAFE.compareAndExchangeLong(base, offset, expected, value);
+        } finally {
+            Reference.reachabilityFence(session);
+        }
+    }
+
+    @ForceInline
+    public long compareAndExchangeLongAcquire(MemorySessionImpl session, Object base, long offset, long expected, long value) {
+        try {
+            return compareAndExchangeLongAcquireInternal(session, base, offset, expected, value);
+        } catch (ScopedAccessError ex) {
+            throw ex.newRuntimeException();
+        }
+    }
+
+    @ForceInline @Scoped
+    private long compareAndExchangeLongAcquireInternal(MemorySessionImpl session, Object base, long offset, long expected, long value) {
+        try {
+            if (session != null) {
+                session.checkValidStateRaw();
+            }
+            return UNSAFE.compareAndExchangeLongAcquire(base, offset, expected, value);
+        } finally {
+            Reference.reachabilityFence(session);
+        }
+    }
+
+    @ForceInline
+    public long compareAndExchangeLongRelease(MemorySessionImpl session, Object base, long offset, long expected, long value) {
+        try {
+            return compareAndExchangeLongReleaseInternal(session, base, offset, expected, value);
+        } catch (ScopedAccessError ex) {
+            throw ex.newRuntimeException();
+        }
+    }
+
+    @ForceInline @Scoped
+    private long compareAndExchangeLongReleaseInternal(MemorySessionImpl session, Object base, long offset, long expected, long value) {
+        try {
+            if (session != null) {
+                session.checkValidStateRaw();
+            }
+            return UNSAFE.compareAndExchangeLongRelease(base, offset, expected, value);
+        } finally {
+            Reference.reachabilityFence(session);
+        }
+    }
+
+    @ForceInline
+    public boolean weakCompareAndSetLongPlain(MemorySessionImpl session, Object base, long offset, long expected, long value) {
+        try {
+            return weakCompareAndSetLongPlainInternal(session, base, offset, expected, value);
+        } catch (ScopedAccessError ex) {
+            throw ex.newRuntimeException();
+        }
+    }
+
+    @ForceInline @Scoped
+    private boolean weakCompareAndSetLongPlainInternal(MemorySessionImpl session, Object base, long offset, long expected, long value) {
+        try {
+            if (session != null) {
+                session.checkValidStateRaw();
+            }
+            return UNSAFE.weakCompareAndSetLongPlain(base, offset, expected, value);
+        } finally {
+            Reference.reachabilityFence(session);
+        }
+    }
+
+    @ForceInline
+    public boolean weakCompareAndSetLong(MemorySessionImpl session, Object base, long offset, long expected, long value) {
+        try {
+            return weakCompareAndSetLongInternal(session, base, offset, expected, value);
+        } catch (ScopedAccessError ex) {
+            throw ex.newRuntimeException();
+        }
+    }
+
+    @ForceInline @Scoped
+    private boolean weakCompareAndSetLongInternal(MemorySessionImpl session, Object base, long offset, long expected, long value) {
+        try {
+            if (session != null) {
+                session.checkValidStateRaw();
+            }
+            return UNSAFE.weakCompareAndSetLong(base, offset, expected, value);
+        } finally {
+            Reference.reachabilityFence(session);
+        }
+    }
+
+    @ForceInline
+    public boolean weakCompareAndSetLongAcquire(MemorySessionImpl session, Object base, long offset, long expected, long value) {
+        try {
+            return weakCompareAndSetLongAcquireInternal(session, base, offset, expected, value);
+        } catch (ScopedAccessError ex) {
+            throw ex.newRuntimeException();
+        }
+    }
+
+    @ForceInline @Scoped
+    private boolean weakCompareAndSetLongAcquireInternal(MemorySessionImpl session, Object base, long offset, long expected, long value) {
+        try {
+            if (session != null) {
+                session.checkValidStateRaw();
+            }
+            return UNSAFE.weakCompareAndSetLongAcquire(base, offset, expected, value);
+        } finally {
+            Reference.reachabilityFence(session);
+        }
+    }
+
+    @ForceInline
+    public boolean weakCompareAndSetLongRelease(MemorySessionImpl session, Object base, long offset, long expected, long value) {
+        try {
+            return weakCompareAndSetLongReleaseInternal(session, base, offset, expected, value);
+        } catch (ScopedAccessError ex) {
+            throw ex.newRuntimeException();
+        }
+    }
+
+    @ForceInline @Scoped
+    private boolean weakCompareAndSetLongReleaseInternal(MemorySessionImpl session, Object base, long offset, long expected, long value) {
+        try {
+            if (session != null) {
+                session.checkValidStateRaw();
+            }
+            return UNSAFE.weakCompareAndSetLongRelease(base, offset, expected, value);
+        } finally {
+            Reference.reachabilityFence(session);
+        }
+    }
+
+    @ForceInline
+    public long getAndSetLong(MemorySessionImpl session, Object base, long offset, long value) {
+        try {
+            return getAndSetLongInternal(session, base, offset, value);
+        } catch (ScopedAccessError ex) {
+            throw ex.newRuntimeException();
+        }
+    }
+
+    @ForceInline @Scoped
+    private long getAndSetLongInternal(MemorySessionImpl session, Object base, long offset, long value) {
+        try {
+            if (session != null) {
+                session.checkValidStateRaw();
+            }
+            return UNSAFE.getAndSetLong(base, offset, value);
+        } finally {
+            Reference.reachabilityFence(session);
+        }
+    }
+
+    @ForceInline
+    public long getAndSetLongAcquire(MemorySessionImpl session, Object base, long offset, long value) {
+        try {
+            return getAndSetLongAcquireInternal(session, base, offset, value);
+        } catch (ScopedAccessError ex) {
+            throw ex.newRuntimeException();
+        }
+    }
+
+    @ForceInline @Scoped
+    private long getAndSetLongAcquireInternal(MemorySessionImpl session, Object base, long offset, long value) {
+        try {
+            if (session != null) {
+                session.checkValidStateRaw();
+            }
+            return UNSAFE.getAndSetLongAcquire(base, offset, value);
+        } finally {
+            Reference.reachabilityFence(session);
+        }
+    }
+
+    @ForceInline
+    public long getAndSetLongRelease(MemorySessionImpl session, Object base, long offset, long value) {
+        try {
+            return getAndSetLongReleaseInternal(session, base, offset, value);
+        } catch (ScopedAccessError ex) {
+            throw ex.newRuntimeException();
+        }
+    }
+
+    @ForceInline @Scoped
+    private long getAndSetLongReleaseInternal(MemorySessionImpl session, Object base, long offset, long value) {
+        try {
+            if (session != null) {
+                session.checkValidStateRaw();
+            }
+            return UNSAFE.getAndSetLongRelease(base, offset, value);
+        } finally {
+            Reference.reachabilityFence(session);
+        }
+    }
+
+    @ForceInline
+    public long getAndAddLong(MemorySessionImpl session, Object base, long offset, long delta) {
+        try {
+            return getAndAddLongInternal(session, base, offset, delta);
+        } catch (ScopedAccessError ex) {
+            throw ex.newRuntimeException();
+        }
+    }
+
+    @ForceInline @Scoped
+    private long getAndAddLongInternal(MemorySessionImpl session, Object base, long offset, long delta) {
+        try {
+            if (session != null) {
+                session.checkValidStateRaw();
+            }
+            return UNSAFE.getAndAddLong(base, offset, delta);
+        } finally {
+            Reference.reachabilityFence(session);
+        }
+    }
+
+    @ForceInline
+    public long getAndAddLongAcquire(MemorySessionImpl session, Object base, long offset, long delta) {
+        try {
+            return getAndAddLongAcquireInternal(session, base, offset, delta);
+        } catch (ScopedAccessError ex) {
+            throw ex.newRuntimeException();
+        }
+    }
+
+    @ForceInline @Scoped
+    private long getAndAddLongAcquireInternal(MemorySessionImpl session, Object base, long offset, long delta) {
+        try {
+            if (session != null) {
+                session.checkValidStateRaw();
+            }
+            return UNSAFE.getAndAddLongAcquire(base, offset, delta);
+        } finally {
+            Reference.reachabilityFence(session);
+        }
+    }
+
+    @ForceInline
+    public long getAndAddLongRelease(MemorySessionImpl session, Object base, long offset, long delta) {
+        try {
+            return getAndAddLongReleaseInternal(session, base, offset, delta);
+        } catch (ScopedAccessError ex) {
+            throw ex.newRuntimeException();
+        }
+    }
+
+    @ForceInline @Scoped
+    private long getAndAddLongReleaseInternal(MemorySessionImpl session, Object base, long offset, long delta) {
+        try {
+            if (session != null) {
+                session.checkValidStateRaw();
+            }
+            return UNSAFE.getAndAddLongRelease(base, offset, delta);
+        } finally {
+            Reference.reachabilityFence(session);
+        }
+    }
+
+    @ForceInline
+    public long getAndBitwiseOrLong(MemorySessionImpl session, Object base, long offset, long value) {
+        try {
+            return getAndBitwiseOrLongInternal(session, base, offset, value);
+        } catch (ScopedAccessError ex) {
+            throw ex.newRuntimeException();
+        }
+    }
+
+    @ForceInline @Scoped
+    private long getAndBitwiseOrLongInternal(MemorySessionImpl session, Object base, long offset, long value) {
+        try {
+            if (session != null) {
+                session.checkValidStateRaw();
+            }
+            return UNSAFE.getAndBitwiseOrLong(base, offset, value);
+        } finally {
+            Reference.reachabilityFence(session);
+        }
+    }
+
+    @ForceInline
+    public long getAndBitwiseOrLongAcquire(MemorySessionImpl session, Object base, long offset, long value) {
+        try {
+            return getAndBitwiseOrLongAcquireInternal(session, base, offset, value);
+        } catch (ScopedAccessError ex) {
+            throw ex.newRuntimeException();
+        }
+    }
+
+    @ForceInline @Scoped
+    private long getAndBitwiseOrLongAcquireInternal(MemorySessionImpl session, Object base, long offset, long value) {
+        try {
+            if (session != null) {
+                session.checkValidStateRaw();
+            }
+            return UNSAFE.getAndBitwiseOrLongAcquire(base, offset, value);
+        } finally {
+            Reference.reachabilityFence(session);
+        }
+    }
+
+    @ForceInline
+    public long getAndBitwiseOrLongRelease(MemorySessionImpl session, Object base, long offset, long value) {
+        try {
+            return getAndBitwiseOrLongReleaseInternal(session, base, offset, value);
+        } catch (ScopedAccessError ex) {
+            throw ex.newRuntimeException();
+        }
+    }
+
+    @ForceInline @Scoped
+    private long getAndBitwiseOrLongReleaseInternal(MemorySessionImpl session, Object base, long offset, long value) {
+        try {
+            if (session != null) {
+                session.checkValidStateRaw();
+            }
+            return UNSAFE.getAndBitwiseOrLongRelease(base, offset, value);
+        } finally {
+            Reference.reachabilityFence(session);
+        }
+    }
+
+    @ForceInline
+    public long getAndBitwiseAndLong(MemorySessionImpl session, Object base, long offset, long value) {
+        try {
+            return getAndBitwiseAndLongInternal(session, base, offset, value);
+        } catch (ScopedAccessError ex) {
+            throw ex.newRuntimeException();
+        }
+    }
+
+    @ForceInline @Scoped
+    private long getAndBitwiseAndLongInternal(MemorySessionImpl session, Object base, long offset, long value) {
+        try {
+            if (session != null) {
+                session.checkValidStateRaw();
+            }
+            return UNSAFE.getAndBitwiseAndLong(base, offset, value);
+        } finally {
+            Reference.reachabilityFence(session);
+        }
+    }
+
+    @ForceInline
+    public long getAndBitwiseAndLongAcquire(MemorySessionImpl session, Object base, long offset, long value) {
+        try {
+            return getAndBitwiseAndLongAcquireInternal(session, base, offset, value);
+        } catch (ScopedAccessError ex) {
+            throw ex.newRuntimeException();
+        }
+    }
+
+    @ForceInline @Scoped
+    private long getAndBitwiseAndLongAcquireInternal(MemorySessionImpl session, Object base, long offset, long value) {
+        try {
+            if (session != null) {
+                session.checkValidStateRaw();
+            }
+            return UNSAFE.getAndBitwiseAndLongAcquire(base, offset, value);
+        } finally {
+            Reference.reachabilityFence(session);
+        }
+    }
+
+    @ForceInline
+    public long getAndBitwiseAndLongRelease(MemorySessionImpl session, Object base, long offset, long value) {
+        try {
+            return getAndBitwiseAndLongReleaseInternal(session, base, offset, value);
+        } catch (ScopedAccessError ex) {
+            throw ex.newRuntimeException();
+        }
+    }
+
+    @ForceInline @Scoped
+    private long getAndBitwiseAndLongReleaseInternal(MemorySessionImpl session, Object base, long offset, long value) {
+        try {
+            if (session != null) {
+                session.checkValidStateRaw();
+            }
+            return UNSAFE.getAndBitwiseAndLongRelease(base, offset, value);
+        } finally {
+            Reference.reachabilityFence(session);
+        }
+    }
+
+    @ForceInline
+    public long getAndBitwiseXorLong(MemorySessionImpl session, Object base, long offset, long value) {
+        try {
+            return getAndBitwiseXorLongInternal(session, base, offset, value);
+        } catch (ScopedAccessError ex) {
+            throw ex.newRuntimeException();
+        }
+    }
+
+    @ForceInline @Scoped
+    private long getAndBitwiseXorLongInternal(MemorySessionImpl session, Object base, long offset, long value) {
+        try {
+            if (session != null) {
+                session.checkValidStateRaw();
+            }
+            return UNSAFE.getAndBitwiseXorLong(base, offset, value);
+        } finally {
+            Reference.reachabilityFence(session);
+        }
+    }
+
+    @ForceInline
+    public long getAndBitwiseXorLongAcquire(MemorySessionImpl session, Object base, long offset, long value) {
+        try {
+            return getAndBitwiseXorLongAcquireInternal(session, base, offset, value);
+        } catch (ScopedAccessError ex) {
+            throw ex.newRuntimeException();
+        }
+    }
+
+    @ForceInline @Scoped
+    private long getAndBitwiseXorLongAcquireInternal(MemorySessionImpl session, Object base, long offset, long value) {
+        try {
+            if (session != null) {
+                session.checkValidStateRaw();
+            }
+            return UNSAFE.getAndBitwiseXorLongAcquire(base, offset, value);
+        } finally {
+            Reference.reachabilityFence(session);
+        }
+    }
+
+    @ForceInline
+    public long getAndBitwiseXorLongRelease(MemorySessionImpl session, Object base, long offset, long value) {
+        try {
+            return getAndBitwiseXorLongReleaseInternal(session, base, offset, value);
+        } catch (ScopedAccessError ex) {
+            throw ex.newRuntimeException();
+        }
+    }
+
+    @ForceInline @Scoped
+    private long getAndBitwiseXorLongReleaseInternal(MemorySessionImpl session, Object base, long offset, long value) {
+        try {
+            if (session != null) {
+                session.checkValidStateRaw();
+            }
+            return UNSAFE.getAndBitwiseXorLongRelease(base, offset, value);
+        } finally {
+            Reference.reachabilityFence(session);
+        }
+    }
+    @ForceInline
+    public float getFloat(MemorySessionImpl session, Object base, long offset) {
+        try {
+            return getFloatInternal(session, base, offset);
+        } catch (ScopedAccessError ex) {
+            throw ex.newRuntimeException();
+        }
+    }
+
+    @ForceInline @Scoped
+    private float getFloatInternal(MemorySessionImpl session, Object base, long offset) {
+        try {
+            if (session != null) {
+                session.checkValidStateRaw();
+            }
+            return UNSAFE.getFloat(base, offset);
+        } finally {
+            Reference.reachabilityFence(session);
+        }
+    }
+
+    @ForceInline
+    public void putFloat(MemorySessionImpl session, Object base, long offset, float value) {
+        try {
+            putFloatInternal(session, base, offset, value);
+        } catch (ScopedAccessError ex) {
+            throw ex.newRuntimeException();
+        }
+    }
+
+    @ForceInline @Scoped
+    private void putFloatInternal(MemorySessionImpl session, Object base, long offset, float value) {
+        try {
+            if (session != null) {
+                session.checkValidStateRaw();
+            }
+            UNSAFE.putFloat(base, offset, value);
+        } finally {
+            Reference.reachabilityFence(session);
+        }
+    }
+
+
+    @ForceInline
+    public float getFloatVolatile(MemorySessionImpl session, Object base, long offset) {
+        try {
+            return getFloatVolatileInternal(session, base, offset);
+        } catch (ScopedAccessError ex) {
+            throw ex.newRuntimeException();
+        }
+    }
+
+    @ForceInline @Scoped
+    private float getFloatVolatileInternal(MemorySessionImpl session, Object base, long offset) {
+        try {
+            if (session != null) {
+                session.checkValidStateRaw();
+            }
+            return UNSAFE.getFloatVolatile(base, offset);
+        } finally {
+            Reference.reachabilityFence(session);
+        }
+    }
+
+    @ForceInline
+    public void putFloatVolatile(MemorySessionImpl session, Object base, long offset, float value) {
+        try {
+            putFloatVolatileInternal(session, base, offset, value);
+        } catch (ScopedAccessError ex) {
+            throw ex.newRuntimeException();
+        }
+    }
+
+    @ForceInline @Scoped
+    private void putFloatVolatileInternal(MemorySessionImpl session, Object base, long offset, float value) {
+        try {
+            if (session != null) {
+                session.checkValidStateRaw();
+            }
+            UNSAFE.putFloatVolatile(base, offset, value);
+        } finally {
+            Reference.reachabilityFence(session);
+        }
+    }
+
+    @ForceInline
+    public float getFloatAcquire(MemorySessionImpl session, Object base, long offset) {
+        try {
+            return getFloatAcquireInternal(session, base, offset);
+        } catch (ScopedAccessError ex) {
+            throw ex.newRuntimeException();
+        }
+    }
+
+    @ForceInline @Scoped
+    private float getFloatAcquireInternal(MemorySessionImpl session, Object base, long offset) {
+        try {
+            if (session != null) {
+                session.checkValidStateRaw();
+            }
+            return UNSAFE.getFloatAcquire(base, offset);
+        } finally {
+            Reference.reachabilityFence(session);
+        }
+    }
+
+    @ForceInline
+    public void putFloatRelease(MemorySessionImpl session, Object base, long offset, float value) {
+        try {
+            putFloatReleaseInternal(session, base, offset, value);
+        } catch (ScopedAccessError ex) {
+            throw ex.newRuntimeException();
+        }
+    }
+
+    @ForceInline @Scoped
+    private void putFloatReleaseInternal(MemorySessionImpl session, Object base, long offset, float value) {
+        try {
+            if (session != null) {
+                session.checkValidStateRaw();
+            }
+            UNSAFE.putFloatRelease(base, offset, value);
+        } finally {
+            Reference.reachabilityFence(session);
+        }
+    }
+
+    @ForceInline
+    public float getFloatOpaque(MemorySessionImpl session, Object base, long offset) {
+        try {
+            return getFloatOpaqueInternal(session, base, offset);
+        } catch (ScopedAccessError ex) {
+            throw ex.newRuntimeException();
+        }
+    }
+
+    @ForceInline @Scoped
+    private float getFloatOpaqueInternal(MemorySessionImpl session, Object base, long offset) {
+        try {
+            if (session != null) {
+                session.checkValidStateRaw();
+            }
+            return UNSAFE.getFloatOpaque(base, offset);
+        } finally {
+            Reference.reachabilityFence(session);
+        }
+    }
+    @ForceInline
+    public void putFloatOpaque(MemorySessionImpl session, Object base, long offset, float value) {
+        try {
+            putFloatOpaqueInternal(session, base, offset, value);
+        } catch (ScopedAccessError ex) {
+            throw ex.newRuntimeException();
+        }
+    }
+
+    @ForceInline @Scoped
+    private void putFloatOpaqueInternal(MemorySessionImpl session, Object base, long offset, float value) {
+        try {
+            if (session != null) {
+                session.checkValidStateRaw();
+            }
+            UNSAFE.putFloatOpaque(base, offset, value);
+        } finally {
+            Reference.reachabilityFence(session);
+        }
+    }
+    @ForceInline
+    public boolean compareAndSetFloat(MemorySessionImpl session, Object base, long offset, float expected, float value) {
+        try {
+            return compareAndSetFloatInternal(session, base, offset, expected, value);
+        } catch (ScopedAccessError ex) {
+            throw ex.newRuntimeException();
+        }
+    }
+
+    @ForceInline @Scoped
+    private boolean compareAndSetFloatInternal(MemorySessionImpl session, Object base, long offset, float expected, float value) {
+        try {
+            if (session != null) {
+                session.checkValidStateRaw();
+            }
+            return UNSAFE.compareAndSetFloat(base, offset, expected, value);
+        } finally {
+            Reference.reachabilityFence(session);
+        }
+    }
+
+    @ForceInline
+    public float compareAndExchangeFloat(MemorySessionImpl session, Object base, long offset, float expected, float value) {
+        try {
+            return compareAndExchangeFloatInternal(session, base, offset, expected, value);
+        } catch (ScopedAccessError ex) {
+            throw ex.newRuntimeException();
+        }
+    }
+
+    @ForceInline @Scoped
+    private float compareAndExchangeFloatInternal(MemorySessionImpl session, Object base, long offset, float expected, float value) {
+        try {
+            if (session != null) {
+                session.checkValidStateRaw();
+            }
+            return UNSAFE.compareAndExchangeFloat(base, offset, expected, value);
+        } finally {
+            Reference.reachabilityFence(session);
+        }
+    }
+
+    @ForceInline
+    public float compareAndExchangeFloatAcquire(MemorySessionImpl session, Object base, long offset, float expected, float value) {
+        try {
+            return compareAndExchangeFloatAcquireInternal(session, base, offset, expected, value);
+        } catch (ScopedAccessError ex) {
+            throw ex.newRuntimeException();
+        }
+    }
+
+    @ForceInline @Scoped
+    private float compareAndExchangeFloatAcquireInternal(MemorySessionImpl session, Object base, long offset, float expected, float value) {
+        try {
+            if (session != null) {
+                session.checkValidStateRaw();
+            }
+            return UNSAFE.compareAndExchangeFloatAcquire(base, offset, expected, value);
+        } finally {
+            Reference.reachabilityFence(session);
+        }
+    }
+
+    @ForceInline
+    public float compareAndExchangeFloatRelease(MemorySessionImpl session, Object base, long offset, float expected, float value) {
+        try {
+            return compareAndExchangeFloatReleaseInternal(session, base, offset, expected, value);
+        } catch (ScopedAccessError ex) {
+            throw ex.newRuntimeException();
+        }
+    }
+
+    @ForceInline @Scoped
+    private float compareAndExchangeFloatReleaseInternal(MemorySessionImpl session, Object base, long offset, float expected, float value) {
+        try {
+            if (session != null) {
+                session.checkValidStateRaw();
+            }
+            return UNSAFE.compareAndExchangeFloatRelease(base, offset, expected, value);
+        } finally {
+            Reference.reachabilityFence(session);
+        }
+    }
+
+    @ForceInline
+    public boolean weakCompareAndSetFloatPlain(MemorySessionImpl session, Object base, long offset, float expected, float value) {
+        try {
+            return weakCompareAndSetFloatPlainInternal(session, base, offset, expected, value);
+        } catch (ScopedAccessError ex) {
+            throw ex.newRuntimeException();
+        }
+    }
+
+    @ForceInline @Scoped
+    private boolean weakCompareAndSetFloatPlainInternal(MemorySessionImpl session, Object base, long offset, float expected, float value) {
+        try {
+            if (session != null) {
+                session.checkValidStateRaw();
+            }
+            return UNSAFE.weakCompareAndSetFloatPlain(base, offset, expected, value);
+        } finally {
+            Reference.reachabilityFence(session);
+        }
+    }
+
+    @ForceInline
+    public boolean weakCompareAndSetFloat(MemorySessionImpl session, Object base, long offset, float expected, float value) {
+        try {
+            return weakCompareAndSetFloatInternal(session, base, offset, expected, value);
+        } catch (ScopedAccessError ex) {
+            throw ex.newRuntimeException();
+        }
+    }
+
+    @ForceInline @Scoped
+    private boolean weakCompareAndSetFloatInternal(MemorySessionImpl session, Object base, long offset, float expected, float value) {
+        try {
+            if (session != null) {
+                session.checkValidStateRaw();
+            }
+            return UNSAFE.weakCompareAndSetFloat(base, offset, expected, value);
+        } finally {
+            Reference.reachabilityFence(session);
+        }
+    }
+
+    @ForceInline
+    public boolean weakCompareAndSetFloatAcquire(MemorySessionImpl session, Object base, long offset, float expected, float value) {
+        try {
+            return weakCompareAndSetFloatAcquireInternal(session, base, offset, expected, value);
+        } catch (ScopedAccessError ex) {
+            throw ex.newRuntimeException();
+        }
+    }
+
+    @ForceInline @Scoped
+    private boolean weakCompareAndSetFloatAcquireInternal(MemorySessionImpl session, Object base, long offset, float expected, float value) {
+        try {
+            if (session != null) {
+                session.checkValidStateRaw();
+            }
+            return UNSAFE.weakCompareAndSetFloatAcquire(base, offset, expected, value);
+        } finally {
+            Reference.reachabilityFence(session);
+        }
+    }
+
+    @ForceInline
+    public boolean weakCompareAndSetFloatRelease(MemorySessionImpl session, Object base, long offset, float expected, float value) {
+        try {
+            return weakCompareAndSetFloatReleaseInternal(session, base, offset, expected, value);
+        } catch (ScopedAccessError ex) {
+            throw ex.newRuntimeException();
+        }
+    }
+
+    @ForceInline @Scoped
+    private boolean weakCompareAndSetFloatReleaseInternal(MemorySessionImpl session, Object base, long offset, float expected, float value) {
+        try {
+            if (session != null) {
+                session.checkValidStateRaw();
+            }
+            return UNSAFE.weakCompareAndSetFloatRelease(base, offset, expected, value);
+        } finally {
+            Reference.reachabilityFence(session);
+        }
+    }
+
+    @ForceInline
+    public float getAndSetFloat(MemorySessionImpl session, Object base, long offset, float value) {
+        try {
+            return getAndSetFloatInternal(session, base, offset, value);
+        } catch (ScopedAccessError ex) {
+            throw ex.newRuntimeException();
+        }
+    }
+
+    @ForceInline @Scoped
+    private float getAndSetFloatInternal(MemorySessionImpl session, Object base, long offset, float value) {
+        try {
+            if (session != null) {
+                session.checkValidStateRaw();
+            }
+            return UNSAFE.getAndSetFloat(base, offset, value);
+        } finally {
+            Reference.reachabilityFence(session);
+        }
+    }
+
+    @ForceInline
+    public float getAndSetFloatAcquire(MemorySessionImpl session, Object base, long offset, float value) {
+        try {
+            return getAndSetFloatAcquireInternal(session, base, offset, value);
+        } catch (ScopedAccessError ex) {
+            throw ex.newRuntimeException();
+        }
+    }
+
+    @ForceInline @Scoped
+    private float getAndSetFloatAcquireInternal(MemorySessionImpl session, Object base, long offset, float value) {
+        try {
+            if (session != null) {
+                session.checkValidStateRaw();
+            }
+            return UNSAFE.getAndSetFloatAcquire(base, offset, value);
+        } finally {
+            Reference.reachabilityFence(session);
+        }
+    }
+
+    @ForceInline
+    public float getAndSetFloatRelease(MemorySessionImpl session, Object base, long offset, float value) {
+        try {
+            return getAndSetFloatReleaseInternal(session, base, offset, value);
+        } catch (ScopedAccessError ex) {
+            throw ex.newRuntimeException();
+        }
+    }
+
+    @ForceInline @Scoped
+    private float getAndSetFloatReleaseInternal(MemorySessionImpl session, Object base, long offset, float value) {
+        try {
+            if (session != null) {
+                session.checkValidStateRaw();
+            }
+            return UNSAFE.getAndSetFloatRelease(base, offset, value);
+        } finally {
+            Reference.reachabilityFence(session);
+        }
+    }
+
+    @ForceInline
+    public float getAndAddFloat(MemorySessionImpl session, Object base, long offset, float delta) {
+        try {
+            return getAndAddFloatInternal(session, base, offset, delta);
+        } catch (ScopedAccessError ex) {
+            throw ex.newRuntimeException();
+        }
+    }
+
+    @ForceInline @Scoped
+    private float getAndAddFloatInternal(MemorySessionImpl session, Object base, long offset, float delta) {
+        try {
+            if (session != null) {
+                session.checkValidStateRaw();
+            }
+            return UNSAFE.getAndAddFloat(base, offset, delta);
+        } finally {
+            Reference.reachabilityFence(session);
+        }
+    }
+
+    @ForceInline
+    public float getAndAddFloatAcquire(MemorySessionImpl session, Object base, long offset, float delta) {
+        try {
+            return getAndAddFloatAcquireInternal(session, base, offset, delta);
+        } catch (ScopedAccessError ex) {
+            throw ex.newRuntimeException();
+        }
+    }
+
+    @ForceInline @Scoped
+    private float getAndAddFloatAcquireInternal(MemorySessionImpl session, Object base, long offset, float delta) {
+        try {
+            if (session != null) {
+                session.checkValidStateRaw();
+            }
+            return UNSAFE.getAndAddFloatAcquire(base, offset, delta);
+        } finally {
+            Reference.reachabilityFence(session);
+        }
+    }
+
+    @ForceInline
+    public float getAndAddFloatRelease(MemorySessionImpl session, Object base, long offset, float delta) {
+        try {
+            return getAndAddFloatReleaseInternal(session, base, offset, delta);
+        } catch (ScopedAccessError ex) {
+            throw ex.newRuntimeException();
+        }
+    }
+
+    @ForceInline @Scoped
+    private float getAndAddFloatReleaseInternal(MemorySessionImpl session, Object base, long offset, float delta) {
+        try {
+            if (session != null) {
+                session.checkValidStateRaw();
+            }
+            return UNSAFE.getAndAddFloatRelease(base, offset, delta);
+        } finally {
+            Reference.reachabilityFence(session);
+        }
+    }
+
+    @ForceInline
+    public double getDouble(MemorySessionImpl session, Object base, long offset) {
+        try {
+            return getDoubleInternal(session, base, offset);
+        } catch (ScopedAccessError ex) {
+            throw ex.newRuntimeException();
+        }
+    }
+
+    @ForceInline @Scoped
+    private double getDoubleInternal(MemorySessionImpl session, Object base, long offset) {
+        try {
+            if (session != null) {
+                session.checkValidStateRaw();
+            }
+            return UNSAFE.getDouble(base, offset);
+        } finally {
+            Reference.reachabilityFence(session);
+        }
+    }
+
+    @ForceInline
+    public void putDouble(MemorySessionImpl session, Object base, long offset, double value) {
+        try {
+            putDoubleInternal(session, base, offset, value);
+        } catch (ScopedAccessError ex) {
+            throw ex.newRuntimeException();
+        }
+    }
+
+    @ForceInline @Scoped
+    private void putDoubleInternal(MemorySessionImpl session, Object base, long offset, double value) {
+        try {
+            if (session != null) {
+                session.checkValidStateRaw();
+            }
+            UNSAFE.putDouble(base, offset, value);
+        } finally {
+            Reference.reachabilityFence(session);
+        }
+    }
+
+
+    @ForceInline
+    public double getDoubleVolatile(MemorySessionImpl session, Object base, long offset) {
+        try {
+            return getDoubleVolatileInternal(session, base, offset);
+        } catch (ScopedAccessError ex) {
+            throw ex.newRuntimeException();
+        }
+    }
+
+    @ForceInline @Scoped
+    private double getDoubleVolatileInternal(MemorySessionImpl session, Object base, long offset) {
+        try {
+            if (session != null) {
+                session.checkValidStateRaw();
+            }
+            return UNSAFE.getDoubleVolatile(base, offset);
+        } finally {
+            Reference.reachabilityFence(session);
+        }
+    }
+
+    @ForceInline
+    public void putDoubleVolatile(MemorySessionImpl session, Object base, long offset, double value) {
+        try {
+            putDoubleVolatileInternal(session, base, offset, value);
+        } catch (ScopedAccessError ex) {
+            throw ex.newRuntimeException();
+        }
+    }
+
+    @ForceInline @Scoped
+    private void putDoubleVolatileInternal(MemorySessionImpl session, Object base, long offset, double value) {
+        try {
+            if (session != null) {
+                session.checkValidStateRaw();
+            }
+            UNSAFE.putDoubleVolatile(base, offset, value);
+        } finally {
+            Reference.reachabilityFence(session);
+        }
+    }
+
+    @ForceInline
+    public double getDoubleAcquire(MemorySessionImpl session, Object base, long offset) {
+        try {
+            return getDoubleAcquireInternal(session, base, offset);
+        } catch (ScopedAccessError ex) {
+            throw ex.newRuntimeException();
+        }
+    }
+
+    @ForceInline @Scoped
+    private double getDoubleAcquireInternal(MemorySessionImpl session, Object base, long offset) {
+        try {
+            if (session != null) {
+                session.checkValidStateRaw();
+            }
+            return UNSAFE.getDoubleAcquire(base, offset);
+        } finally {
+            Reference.reachabilityFence(session);
+        }
+    }
+
+    @ForceInline
+    public void putDoubleRelease(MemorySessionImpl session, Object base, long offset, double value) {
+        try {
+            putDoubleReleaseInternal(session, base, offset, value);
+        } catch (ScopedAccessError ex) {
+            throw ex.newRuntimeException();
+        }
+    }
+
+    @ForceInline @Scoped
+    private void putDoubleReleaseInternal(MemorySessionImpl session, Object base, long offset, double value) {
+        try {
+            if (session != null) {
+                session.checkValidStateRaw();
+            }
+            UNSAFE.putDoubleRelease(base, offset, value);
+        } finally {
+            Reference.reachabilityFence(session);
+        }
+    }
+
+    @ForceInline
+    public double getDoubleOpaque(MemorySessionImpl session, Object base, long offset) {
+        try {
+            return getDoubleOpaqueInternal(session, base, offset);
+        } catch (ScopedAccessError ex) {
+            throw ex.newRuntimeException();
+        }
+    }
+
+    @ForceInline @Scoped
+    private double getDoubleOpaqueInternal(MemorySessionImpl session, Object base, long offset) {
+        try {
+            if (session != null) {
+                session.checkValidStateRaw();
+            }
+            return UNSAFE.getDoubleOpaque(base, offset);
+        } finally {
+            Reference.reachabilityFence(session);
+        }
+    }
+    @ForceInline
+    public void putDoubleOpaque(MemorySessionImpl session, Object base, long offset, double value) {
+        try {
+            putDoubleOpaqueInternal(session, base, offset, value);
+        } catch (ScopedAccessError ex) {
+            throw ex.newRuntimeException();
+        }
+    }
+
+    @ForceInline @Scoped
+    private void putDoubleOpaqueInternal(MemorySessionImpl session, Object base, long offset, double value) {
+        try {
+            if (session != null) {
+                session.checkValidStateRaw();
+            }
+            UNSAFE.putDoubleOpaque(base, offset, value);
+        } finally {
+            Reference.reachabilityFence(session);
+        }
+    }
+    @ForceInline
+    public boolean compareAndSetDouble(MemorySessionImpl session, Object base, long offset, double expected, double value) {
+        try {
+            return compareAndSetDoubleInternal(session, base, offset, expected, value);
+        } catch (ScopedAccessError ex) {
+            throw ex.newRuntimeException();
+        }
+    }
+
+    @ForceInline @Scoped
+    private boolean compareAndSetDoubleInternal(MemorySessionImpl session, Object base, long offset, double expected, double value) {
+        try {
+            if (session != null) {
+                session.checkValidStateRaw();
+            }
+            return UNSAFE.compareAndSetDouble(base, offset, expected, value);
+        } finally {
+            Reference.reachabilityFence(session);
+        }
+    }
+
+    @ForceInline
+    public double compareAndExchangeDouble(MemorySessionImpl session, Object base, long offset, double expected, double value) {
+        try {
+            return compareAndExchangeDoubleInternal(session, base, offset, expected, value);
+        } catch (ScopedAccessError ex) {
+            throw ex.newRuntimeException();
+        }
+    }
+
+    @ForceInline @Scoped
+    private double compareAndExchangeDoubleInternal(MemorySessionImpl session, Object base, long offset, double expected, double value) {
+        try {
+            if (session != null) {
+                session.checkValidStateRaw();
+            }
+            return UNSAFE.compareAndExchangeDouble(base, offset, expected, value);
+        } finally {
+            Reference.reachabilityFence(session);
+        }
+    }
+
+    @ForceInline
+    public double compareAndExchangeDoubleAcquire(MemorySessionImpl session, Object base, long offset, double expected, double value) {
+        try {
+            return compareAndExchangeDoubleAcquireInternal(session, base, offset, expected, value);
+        } catch (ScopedAccessError ex) {
+            throw ex.newRuntimeException();
+        }
+    }
+
+    @ForceInline @Scoped
+    private double compareAndExchangeDoubleAcquireInternal(MemorySessionImpl session, Object base, long offset, double expected, double value) {
+        try {
+            if (session != null) {
+                session.checkValidStateRaw();
+            }
+            return UNSAFE.compareAndExchangeDoubleAcquire(base, offset, expected, value);
+        } finally {
+            Reference.reachabilityFence(session);
+        }
+    }
+
+    @ForceInline
+    public double compareAndExchangeDoubleRelease(MemorySessionImpl session, Object base, long offset, double expected, double value) {
+        try {
+            return compareAndExchangeDoubleReleaseInternal(session, base, offset, expected, value);
+        } catch (ScopedAccessError ex) {
+            throw ex.newRuntimeException();
+        }
+    }
+
+    @ForceInline @Scoped
+    private double compareAndExchangeDoubleReleaseInternal(MemorySessionImpl session, Object base, long offset, double expected, double value) {
+        try {
+            if (session != null) {
+                session.checkValidStateRaw();
+            }
+            return UNSAFE.compareAndExchangeDoubleRelease(base, offset, expected, value);
+        } finally {
+            Reference.reachabilityFence(session);
+        }
+    }
+
+    @ForceInline
+    public boolean weakCompareAndSetDoublePlain(MemorySessionImpl session, Object base, long offset, double expected, double value) {
+        try {
+            return weakCompareAndSetDoublePlainInternal(session, base, offset, expected, value);
+        } catch (ScopedAccessError ex) {
+            throw ex.newRuntimeException();
+        }
+    }
+
+    @ForceInline @Scoped
+    private boolean weakCompareAndSetDoublePlainInternal(MemorySessionImpl session, Object base, long offset, double expected, double value) {
+        try {
+            if (session != null) {
+                session.checkValidStateRaw();
+            }
+            return UNSAFE.weakCompareAndSetDoublePlain(base, offset, expected, value);
+        } finally {
+            Reference.reachabilityFence(session);
+        }
+    }
+
+    @ForceInline
+    public boolean weakCompareAndSetDouble(MemorySessionImpl session, Object base, long offset, double expected, double value) {
+        try {
+            return weakCompareAndSetDoubleInternal(session, base, offset, expected, value);
+        } catch (ScopedAccessError ex) {
+            throw ex.newRuntimeException();
+        }
+    }
+
+    @ForceInline @Scoped
+    private boolean weakCompareAndSetDoubleInternal(MemorySessionImpl session, Object base, long offset, double expected, double value) {
+        try {
+            if (session != null) {
+                session.checkValidStateRaw();
+            }
+            return UNSAFE.weakCompareAndSetDouble(base, offset, expected, value);
+        } finally {
+            Reference.reachabilityFence(session);
+        }
+    }
+
+    @ForceInline
+    public boolean weakCompareAndSetDoubleAcquire(MemorySessionImpl session, Object base, long offset, double expected, double value) {
+        try {
+            return weakCompareAndSetDoubleAcquireInternal(session, base, offset, expected, value);
+        } catch (ScopedAccessError ex) {
+            throw ex.newRuntimeException();
+        }
+    }
+
+    @ForceInline @Scoped
+    private boolean weakCompareAndSetDoubleAcquireInternal(MemorySessionImpl session, Object base, long offset, double expected, double value) {
+        try {
+            if (session != null) {
+                session.checkValidStateRaw();
+            }
+            return UNSAFE.weakCompareAndSetDoubleAcquire(base, offset, expected, value);
+        } finally {
+            Reference.reachabilityFence(session);
+        }
+    }
+
+    @ForceInline
+    public boolean weakCompareAndSetDoubleRelease(MemorySessionImpl session, Object base, long offset, double expected, double value) {
+        try {
+            return weakCompareAndSetDoubleReleaseInternal(session, base, offset, expected, value);
+        } catch (ScopedAccessError ex) {
+            throw ex.newRuntimeException();
+        }
+    }
+
+    @ForceInline @Scoped
+    private boolean weakCompareAndSetDoubleReleaseInternal(MemorySessionImpl session, Object base, long offset, double expected, double value) {
+        try {
+            if (session != null) {
+                session.checkValidStateRaw();
+            }
+            return UNSAFE.weakCompareAndSetDoubleRelease(base, offset, expected, value);
+        } finally {
+            Reference.reachabilityFence(session);
+        }
+    }
+
+    @ForceInline
+    public double getAndSetDouble(MemorySessionImpl session, Object base, long offset, double value) {
+        try {
+            return getAndSetDoubleInternal(session, base, offset, value);
+        } catch (ScopedAccessError ex) {
+            throw ex.newRuntimeException();
+        }
+    }
+
+    @ForceInline @Scoped
+    private double getAndSetDoubleInternal(MemorySessionImpl session, Object base, long offset, double value) {
+        try {
+            if (session != null) {
+                session.checkValidStateRaw();
+            }
+            return UNSAFE.getAndSetDouble(base, offset, value);
+        } finally {
+            Reference.reachabilityFence(session);
+        }
+    }
+
+    @ForceInline
+    public double getAndSetDoubleAcquire(MemorySessionImpl session, Object base, long offset, double value) {
+        try {
+            return getAndSetDoubleAcquireInternal(session, base, offset, value);
+        } catch (ScopedAccessError ex) {
+            throw ex.newRuntimeException();
+        }
+    }
+
+    @ForceInline @Scoped
+    private double getAndSetDoubleAcquireInternal(MemorySessionImpl session, Object base, long offset, double value) {
+        try {
+            if (session != null) {
+                session.checkValidStateRaw();
+            }
+            return UNSAFE.getAndSetDoubleAcquire(base, offset, value);
+        } finally {
+            Reference.reachabilityFence(session);
+        }
+    }
+
+    @ForceInline
+    public double getAndSetDoubleRelease(MemorySessionImpl session, Object base, long offset, double value) {
+        try {
+            return getAndSetDoubleReleaseInternal(session, base, offset, value);
+        } catch (ScopedAccessError ex) {
+            throw ex.newRuntimeException();
+        }
+    }
+
+    @ForceInline @Scoped
+    private double getAndSetDoubleReleaseInternal(MemorySessionImpl session, Object base, long offset, double value) {
+        try {
+            if (session != null) {
+                session.checkValidStateRaw();
+            }
+            return UNSAFE.getAndSetDoubleRelease(base, offset, value);
+        } finally {
+            Reference.reachabilityFence(session);
+        }
+    }
+
+    @ForceInline
+    public double getAndAddDouble(MemorySessionImpl session, Object base, long offset, double delta) {
+        try {
+            return getAndAddDoubleInternal(session, base, offset, delta);
+        } catch (ScopedAccessError ex) {
+            throw ex.newRuntimeException();
+        }
+    }
+
+    @ForceInline @Scoped
+    private double getAndAddDoubleInternal(MemorySessionImpl session, Object base, long offset, double delta) {
+        try {
+            if (session != null) {
+                session.checkValidStateRaw();
+            }
+            return UNSAFE.getAndAddDouble(base, offset, delta);
+        } finally {
+            Reference.reachabilityFence(session);
+        }
+    }
+
+    @ForceInline
+    public double getAndAddDoubleAcquire(MemorySessionImpl session, Object base, long offset, double delta) {
+        try {
+            return getAndAddDoubleAcquireInternal(session, base, offset, delta);
+        } catch (ScopedAccessError ex) {
+            throw ex.newRuntimeException();
+        }
+    }
+
+    @ForceInline @Scoped
+    private double getAndAddDoubleAcquireInternal(MemorySessionImpl session, Object base, long offset, double delta) {
+        try {
+            if (session != null) {
+                session.checkValidStateRaw();
+            }
+            return UNSAFE.getAndAddDoubleAcquire(base, offset, delta);
+        } finally {
+            Reference.reachabilityFence(session);
+        }
+    }
+
+    @ForceInline
+    public double getAndAddDoubleRelease(MemorySessionImpl session, Object base, long offset, double delta) {
+        try {
+            return getAndAddDoubleReleaseInternal(session, base, offset, delta);
+        } catch (ScopedAccessError ex) {
+            throw ex.newRuntimeException();
+        }
+    }
+
+    @ForceInline @Scoped
+    private double getAndAddDoubleReleaseInternal(MemorySessionImpl session, Object base, long offset, double delta) {
+        try {
+            if (session != null) {
+                session.checkValidStateRaw();
+            }
+            return UNSAFE.getAndAddDoubleRelease(base, offset, delta);
+        } finally {
+            Reference.reachabilityFence(session);
+        }
+    }
+
+}
diff --git a/tests/test_data/std/jdk/internal/misc/Signal$1.class b/tests/test_data/std/jdk/internal/misc/Signal$1.class
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/misc/Signal$Handler.class b/tests/test_data/std/jdk/internal/misc/Signal$Handler.class
new file mode 100644
index 0000000000000000000000000000000000000000..363474a085956fea5c372ab8e8a97d2409f4be32
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diff --git a/tests/test_data/std/jdk/internal/misc/Signal$NativeHandler.class b/tests/test_data/std/jdk/internal/misc/Signal$NativeHandler.class
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diff --git a/tests/test_data/std/jdk/internal/misc/Signal.java b/tests/test_data/std/jdk/internal/misc/Signal.java
new file mode 100644
index 00000000..9cd9ea0b
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/misc/Signal.java
@@ -0,0 +1,287 @@
+/*
+ * Copyright (c) 1998, 2022, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package jdk.internal.misc;
+
+import java.util.Hashtable;
+import java.util.Objects;
+
+/**
+ * This class provides ANSI/ISO C signal support. A Java program can register
+ * signal handlers for the current process. There are two restrictions:
+ * <ul>
+ * <li>
+ * Java code cannot register a handler for signals that are already used
+ * by the Java VM implementation. The <code>Signal.handle</code>
+ * function raises an <code>IllegalArgumentException</code> if such an attempt
+ * is made.
+ * <li>
+ * When <code>Signal.handle</code> is called, the VM internally registers a
+ * special C signal handler. There is no way to force the Java signal handler
+ * to run synchronously before the C signal handler returns. Instead, when the
+ * VM receives a signal, the special C signal handler creates a new thread
+ * (at priority <code>Thread.MAX_PRIORITY</code>) to
+ * run the registered Java signal handler. The C signal handler immediately
+ * returns. Note that because the Java signal handler runs in a newly created
+ * thread, it may not actually be executed until some time after the C signal
+ * handler returns.
+ * </ul>
+ * <p>
+ * Signal objects are created based on their names. For example:
+ * <blockquote><pre>
+ * new Signal("INT");
+ * </pre></blockquote>
+ * constructs a signal object corresponding to <code>SIGINT</code>, which is
+ * typically produced when the user presses <code>Ctrl-C</code> at the command line.
+ * The <code>Signal</code> constructor throws <code>IllegalArgumentException</code>
+ * when it is passed an unknown signal.
+ * <p>
+ * This is an example of how Java code handles <code>SIGINT</code>:
+ * <blockquote><pre>
+ * Signal.Handler handler = new Signal.Handler () {
+ *     public void handle(Signal sig) {
+ *       ... // handle SIGINT
+ *     }
+ * };
+ * Signal.handle(new Signal("INT"), handler);
+ * </pre></blockquote>
+ *
+ * @since    9
+ */
+public final class Signal {
+    private static final Hashtable<Signal, Signal.Handler> handlers = new Hashtable<>(4);
+    private static final Hashtable<Integer, Signal> signals = new Hashtable<>(4);
+
+    private int number;
+    private String name;
+
+    /* Returns the signal number */
+    public int getNumber() {
+        return number;
+    }
+
+    /**
+     * Returns the signal name.
+     *
+     * @return the name of the signal.
+     * @see jdk.internal.misc.Signal#Signal(String name)
+     */
+    public String getName() {
+        return name;
+    }
+
+    /**
+     * Compares the equality of two <code>Signal</code> objects.
+     *
+     * @param obj the object to compare with.
+     * @return whether two <code>Signal</code> objects are equal.
+     */
+    public boolean equals(Object obj) {
+        if (this == obj) {
+            return true;
+        }
+        if (obj instanceof Signal other) {
+            return name.equals(other.name) && (number == other.number);
+        }
+        return false;
+    }
+
+    /**
+     * Returns a hashcode for this Signal.
+     *
+     * @return  a hash code value for this object.
+     */
+    public int hashCode() {
+        return number;
+    }
+
+    /**
+     * Returns a string representation of this signal. For example, "SIGINT"
+     * for an object constructed using <code>new Signal ("INT")</code>.
+     *
+     * @return a string representation of the signal
+     */
+    public String toString() {
+        return "SIG" + name;
+    }
+
+    /**
+     * Constructs a signal from its name.
+     *
+     * @param name the name of the signal.
+     * @exception IllegalArgumentException unknown signal
+     * @see jdk.internal.misc.Signal#getName()
+     */
+    public Signal(String name) {
+        Objects.requireNonNull(name, "name");
+        // Signal names are the short names;
+        // the "SIG" prefix is not used for compatibility with previous JDKs
+        if (name.startsWith("SIG")) {
+            throw new IllegalArgumentException("Unknown signal: " + name);
+        }
+        this.name = name;
+        number = findSignal0(name);
+        if (number < 0) {
+            throw new IllegalArgumentException("Unknown signal: " + name);
+        }
+    }
+
+    /**
+     * Registers a signal handler.
+     *
+     * @param sig a signal
+     * @param handler the handler to be registered with the given signal.
+     * @return the old handler
+     * @exception IllegalArgumentException the signal is in use by the VM
+     * @see jdk.internal.misc.Signal#raise(Signal sig)
+     * @see jdk.internal.misc.Signal.Handler
+     * @see jdk.internal.misc.Signal.Handler#SIG_DFL
+     * @see jdk.internal.misc.Signal.Handler#SIG_IGN
+     */
+    public static synchronized Signal.Handler handle(Signal sig,
+                                                     Signal.Handler handler)
+        throws IllegalArgumentException {
+        Objects.requireNonNull(sig, "sig");
+        Objects.requireNonNull(handler, "handler");
+        long newH = (handler instanceof NativeHandler) ?
+                      ((NativeHandler)handler).getHandler() : 2;
+        long oldH = handle0(sig.number, newH);
+        if (oldH == -1) {
+            throw new IllegalArgumentException
+                ("Signal already used by VM or OS: " + sig);
+        }
+        signals.put(sig.number, sig);
+        Signal.Handler oldHandler;
+        if (newH == 2) {
+            oldHandler = handlers.put(sig, handler);
+        } else {
+            oldHandler = handlers.remove(sig);
+        }
+        if (oldH == 0) {
+            return Signal.Handler.SIG_DFL;
+        } else if (oldH == 1) {
+            return Signal.Handler.SIG_IGN;
+        } else if (oldH == 2) {
+            return oldHandler;
+        } else {
+            return new NativeHandler(oldH);
+        }
+    }
+
+    /**
+     * Raises a signal in the current process.
+     *
+     * @param sig a signal
+     * @see jdk.internal.misc.Signal#handle(Signal sig, Signal.Handler handler)
+     */
+    public static void raise(Signal sig) throws IllegalArgumentException {
+        Objects.requireNonNull(sig, "sig");
+        if (handlers.get(sig) == null) {
+            throw new IllegalArgumentException("Unhandled signal: " + sig);
+        }
+        raise0(sig.number);
+    }
+
+    /* Called by the VM to execute Java signal handlers. */
+    private static void dispatch(final int number) {
+        final Signal sig = signals.get(number);
+        final Signal.Handler handler = handlers.get(sig);
+
+        Runnable runnable = new Runnable () {
+            public void run() {
+              // Don't bother to reset the priority. Signal handler will
+              // run at maximum priority inherited from the VM signal
+              // dispatch thread.
+              // Thread.currentThread().setPriority(Thread.NORM_PRIORITY);
+                handler.handle(sig);
+            }
+        };
+        if (handler != null) {
+            new Thread(null, runnable, sig + " handler", 0, false).start();
+        }
+    }
+
+    /* Find the signal number, given a name. Returns -1 for unknown signals. */
+    private static native int findSignal0(String sigName);
+    /* Registers a native signal handler, and returns the old handler.
+     * Handler values:
+     *   0     default handler
+     *   1     ignore the signal
+     *   2     call back to Signal.dispatch
+     *   other arbitrary native signal handlers
+     */
+    private static native long handle0(int sig, long nativeH);
+    /* Raise a given signal number */
+    private static native void raise0(int sig);
+
+    /**
+     * This is the signal handler interface expected in <code>Signal.handle</code>.
+     */
+    public interface Handler {
+
+        /**
+         * The default signal handler
+         */
+        public static final Signal.Handler SIG_DFL = new NativeHandler(0);
+        /**
+         * Ignore the signal
+         */
+        public static final Signal.Handler SIG_IGN = new NativeHandler(1);
+
+        /**
+         * Handle the given signal
+         *
+         * @param sig a signal object
+         */
+        public void handle(Signal sig);
+    }
+
+
+    /*
+     * A package-private class implementing a signal handler in native code.
+     */
+    static final class NativeHandler implements Signal.Handler {
+
+        private final long handler;
+
+        long getHandler() {
+            return handler;
+        }
+
+        NativeHandler(long handler) {
+            this.handler = handler;
+        }
+
+        public void handle(Signal sig) {
+            throw new UnsupportedOperationException("invoking native signal handle not supported");
+        }
+
+        public String toString() {
+            return this == SIG_DFL ? "SIG_DFL" :
+                    (this == SIG_IGN ? "SIG_IGN" : super.toString());
+        }
+    }
+
+}
diff --git a/tests/test_data/std/jdk/internal/misc/TerminatingThreadLocal$1.class b/tests/test_data/std/jdk/internal/misc/TerminatingThreadLocal$1.class
new file mode 100644
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GIT binary patch
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HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/misc/TerminatingThreadLocal.java b/tests/test_data/std/jdk/internal/misc/TerminatingThreadLocal.java
new file mode 100644
index 00000000..eeb1a77e
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/misc/TerminatingThreadLocal.java
@@ -0,0 +1,106 @@
+/*
+ * Copyright (c) 2018, 2022, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package jdk.internal.misc;
+
+import java.util.Collection;
+import java.util.Collections;
+import java.util.IdentityHashMap;
+
+/**
+ * A per-carrier-thread-local variable that is notified when a thread terminates and
+ * it has been initialized in the terminating carrier thread or a virtual thread
+ * that had the terminating carrier thread as its carrier thread (even if it was
+ * initialized with a null value).
+ */
+public class TerminatingThreadLocal<T> extends CarrierThreadLocal<T> {
+
+    @Override
+    public void set(T value) {
+        super.set(value);
+        register(this);
+    }
+
+    @Override
+    public void remove() {
+        super.remove();
+        unregister(this);
+    }
+
+    /**
+     * Invoked by a thread when terminating and this thread-local has an associated
+     * value for the terminating thread (even if that value is null), so that any
+     * native resources maintained by the value can be released.
+     *
+     * @param value current thread's value of this thread-local variable
+     *              (may be null but only if null value was explicitly initialized)
+     */
+    protected void threadTerminated(T value) {
+    }
+
+    // following methods and field are implementation details and should only be
+    // called from the corresponding code int Thread/ThreadLocal class.
+
+    /**
+     * Invokes the TerminatingThreadLocal's {@link #threadTerminated()} method
+     * on all instances registered in current thread.
+     */
+    public static void threadTerminated() {
+        for (TerminatingThreadLocal<?> ttl : REGISTRY.get()) {
+            ttl._threadTerminated();
+        }
+    }
+
+    private void _threadTerminated() { threadTerminated(get()); }
+
+    /**
+     * Register given TerminatingThreadLocal
+     *
+     * @param tl the ThreadLocal to register
+     */
+    public static void register(TerminatingThreadLocal<?> tl) {
+        REGISTRY.get().add(tl);
+    }
+
+    /**
+     * Unregister given TerminatingThreadLocal
+     *
+     * @param tl the ThreadLocal to unregister
+     */
+    private static void unregister(TerminatingThreadLocal<?> tl) {
+        REGISTRY.get().remove(tl);
+    }
+
+    /**
+     * a per-carrier-thread registry of TerminatingThreadLocal(s) that have been registered
+     * but later not unregistered in a particular carrier-thread.
+     */
+    public static final CarrierThreadLocal<Collection<TerminatingThreadLocal<?>>> REGISTRY =
+        new CarrierThreadLocal<>() {
+            @Override
+            protected Collection<TerminatingThreadLocal<?>> initialValue() {
+                return Collections.newSetFromMap(new IdentityHashMap<>(4));
+            }
+        };
+}
diff --git a/tests/test_data/std/jdk/internal/misc/ThreadFlock$ThreadContainerImpl.class b/tests/test_data/std/jdk/internal/misc/ThreadFlock$ThreadContainerImpl.class
new file mode 100644
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diff --git a/tests/test_data/std/jdk/internal/misc/ThreadFlock.java b/tests/test_data/std/jdk/internal/misc/ThreadFlock.java
new file mode 100644
index 00000000..e9c75d4a
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/misc/ThreadFlock.java
@@ -0,0 +1,591 @@
+/*
+ * Copyright (c) 2021, 2023, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package jdk.internal.misc;
+
+import java.lang.invoke.MethodHandles;
+import java.lang.invoke.VarHandle;
+import java.time.Duration;
+import java.util.Objects;
+import java.util.Set;
+import java.util.concurrent.ConcurrentHashMap;
+import java.util.concurrent.TimeoutException;
+import java.util.concurrent.StructureViolationException;
+import java.util.concurrent.locks.LockSupport;
+import java.util.stream.Stream;
+import jdk.internal.access.JavaLangAccess;
+import jdk.internal.access.SharedSecrets;
+import jdk.internal.vm.ScopedValueContainer;
+import jdk.internal.vm.ThreadContainer;
+import jdk.internal.vm.ThreadContainers;
+import static java.util.concurrent.TimeUnit.NANOSECONDS;
+
+/**
+ * A grouping of threads that typically run closely related tasks. Threads started
+ * in a flock remain in the flock until they terminate.
+ *
+ * <p> ThreadFlock defines the {@link #open(String) open} method to open a new flock,
+ * the {@link #start(Thread) start} method to start a thread in the flock, and the
+ * {@link #close() close} method to close the flock. The {@code close} waits for all
+ * threads in the flock to finish. The {@link #awaitAll() awaitAll} method may be used
+ * to wait for all threads to finish without closing the flock. The {@link #wakeup()}
+ * method will cause {@code awaitAll} method to complete early, which can be used to
+ * support cancellation in higher-level APIs. ThreadFlock also defines the {@link
+ * #shutdown() shutdown} method to prevent new threads from starting while allowing
+ * existing threads in the flock to continue.
+ *
+ * <p> Thread flocks are intended to be used in a <em>structured manner</em>. The
+ * thread that opens a new flock is the {@link #owner() owner}. The owner closes the
+ * flock when done, failure to do so may result in a resource leak. The {@code open}
+ * and {@code close} should be matched to avoid closing an <em>enclosing</em> flock
+ * while a <em>nested</em> flock is open. A ThreadFlock can be used with the
+ * try-with-resources construct if required but more likely, the close method of a
+ * higher-level API that implements {@link AutoCloseable} will close the flock.
+ *
+ * <p> Thread flocks are conceptually nodes in a tree. A thread {@code T} started in
+ * flock "A" may itself open a new flock "B", implicitly forming a tree where flock
+ * "A" is the parent of flock "B". When nested, say where thread {@code T} opens
+ * flock "B" and then invokes a method that opens flock "C", then the enclosing
+ * flock "B" is conceptually the parent of the nested flock "C". ThreadFlock does
+ * not define APIs that exposes the tree structure. It does define the {@link
+ * #containsThread(Thread) containsThread} method to test if a flock contains a
+ * thread, a test that is equivalent to testing membership of flocks in the tree.
+ * The {@code start} and {@code shutdown} methods are confined to the flock
+ * owner or threads contained in the flock. The confinement check is equivalent to
+ * invoking the {@code containsThread} method to test if the caller is contained
+ * in the flock.
+ *
+ * <p> Unless otherwise specified, passing a {@code null} argument to a method
+ * in this class will cause a {@link NullPointerException} to be thrown.
+ */
+public class ThreadFlock implements AutoCloseable {
+    private static final JavaLangAccess JLA = SharedSecrets.getJavaLangAccess();
+    private static final VarHandle THREAD_COUNT;
+    private static final VarHandle PERMIT;
+    static {
+        try {
+            MethodHandles.Lookup l = MethodHandles.lookup();
+            THREAD_COUNT = l.findVarHandle(ThreadFlock.class, "threadCount", int.class);
+            PERMIT = l.findVarHandle(ThreadFlock.class, "permit", boolean.class);
+        } catch (Exception e) {
+            throw new InternalError(e);
+        }
+    }
+
+    private final Set<Thread> threads = ConcurrentHashMap.newKeySet();
+
+    // thread count, need to re-examine contention once API is stable
+    private volatile int threadCount;
+
+    private final String name;
+    private final ScopedValueContainer.BindingsSnapshot scopedValueBindings;
+    private final ThreadContainerImpl container; // encapsulate for now
+
+    // state
+    private volatile boolean shutdown;
+    private volatile boolean closed;
+
+    // set by wakeup, cleared by awaitAll
+    private volatile boolean permit;
+
+    ThreadFlock(String name) {
+        this.name = name;
+        this.scopedValueBindings = ScopedValueContainer.captureBindings();
+        this.container = new ThreadContainerImpl(this);
+    }
+
+    private long threadCount() {
+        return threadCount;
+    }
+
+    private ScopedValueContainer.BindingsSnapshot scopedValueBindings() {
+        return scopedValueBindings;
+    }
+
+    private void incrementThreadCount() {
+        THREAD_COUNT.getAndAdd(this, 1);
+    }
+
+    /**
+     * Decrement the thread count. Unpark the owner if the count goes to zero.
+     */
+    private void decrementThreadCount() {
+        int count = (int) THREAD_COUNT.getAndAdd(this, -1) - 1;
+
+        // signal owner when the count goes to zero
+        if (count == 0) {
+            LockSupport.unpark(owner());
+        }
+    }
+
+    /**
+     * Invoked on the parent thread when starting {@code thread}.
+     */
+    private void onStart(Thread thread) {
+        incrementThreadCount();
+        boolean done = false;
+        try {
+            boolean added = threads.add(thread);
+            assert added;
+            if (shutdown)
+                throw new IllegalStateException("Shutdown");
+            done = true;
+        } finally {
+            if (!done) {
+                threads.remove(thread);
+                decrementThreadCount();
+            }
+        }
+    }
+
+    /**
+     * Invoked on the terminating thread or the parent thread when starting
+     * {@code thread} failed. This method is only called if onStart succeeded.
+     */
+    private void onExit(Thread thread) {
+        boolean removed = threads.remove(thread);
+        assert removed;
+        decrementThreadCount();
+    }
+
+    /**
+     * Clear wakeup permit.
+     */
+    private void clearPermit() {
+        if (permit)
+            permit = false;
+    }
+
+    /**
+     * Sets the wakeup permit to the given value, returning the previous value.
+     */
+    private boolean getAndSetPermit(boolean newValue) {
+        if (permit != newValue) {
+            return (boolean) PERMIT.getAndSet(this, newValue);
+        } else {
+            return newValue;
+        }
+    }
+
+    /**
+     * Throws WrongThreadException if the current thread is not the owner.
+     */
+    private void ensureOwner() {
+        if (Thread.currentThread() != owner())
+            throw new WrongThreadException("Current thread not owner");
+    }
+
+    /**
+     * Throws WrongThreadException if the current thread is not the owner
+     * or a thread contained in the flock.
+     */
+    private void ensureOwnerOrContainsThread() {
+        Thread currentThread = Thread.currentThread();
+        if (currentThread != owner() && !containsThread(currentThread))
+            throw new WrongThreadException("Current thread not owner or thread in flock");
+    }
+
+    /**
+     * Opens a new thread flock. The flock is owned by the current thread. It can be
+     * named to aid debugging.
+     *
+     * <p> This method captures the current thread's {@linkplain ScopedValue scoped value}
+     * bindings for inheritance by threads created in the flock.
+     *
+     * <p> For the purposes of containment, monitoring, and debugging, the parent
+     * of the new flock is determined as follows:
+     * <ul>
+     * <li> If the current thread is the owner of open flocks then the most recently
+     * created, and open, flock is the parent of the new flock. In other words, the
+     * <em>enclosing flock</em> is the parent.
+     * <li> If the current thread is not the owner of any open flocks then the
+     * parent of the new flock is the current thread's flock. If the current thread
+     * was not started in a flock then the new flock does not have a parent.
+     * </ul>
+     *
+     * @param name the name of the flock, can be null
+     * @return a new thread flock
+     */
+    public static ThreadFlock open(String name) {
+        var flock = new ThreadFlock(name);
+        flock.container.push();
+        return flock;
+    }
+
+    /**
+     * {@return the name of this flock or {@code null} if unnamed}
+     */
+    public String name() {
+        return name;
+    }
+
+    /**
+     * {@return the owner of this flock}
+     */
+    public Thread owner() {
+        return container.owner();
+    }
+
+    /**
+     * Starts the given unstarted thread in this flock.
+     *
+     * <p> The thread is started with the scoped value bindings that were captured
+     * when opening the flock. The bindings must match the current thread's bindings.
+     *
+     * <p> This method may only be invoked by the flock owner or threads {@linkplain
+     * #containsThread(Thread) contained} in the flock.
+     *
+     * @param thread the unstarted thread
+     * @return the thread, started
+     * @throws IllegalStateException if this flock is shutdown or closed
+     * @throws IllegalThreadStateException if the given thread was already started
+     * @throws WrongThreadException if the current thread is not the owner or a thread
+     * contained in the flock
+     * @throws StructureViolationException if the current scoped value bindings are
+     * not the same as when the flock was created
+     */
+    public Thread start(Thread thread) {
+        ensureOwnerOrContainsThread();
+        JLA.start(thread, container);
+        return thread;
+    }
+
+    /**
+     * Shutdown this flock so that no new threads can be started, existing threads
+     * in the flock will continue to run. This method is a no-op if the flock is
+     * already shutdown or closed.
+     *
+     * <p> This method may only be invoked by the flock owner or threads {@linkplain
+     * #containsThread(Thread) contained} in the flock.
+     *
+     * @throws WrongThreadException if the current thread is not the owner or a thread
+     * contained in the flock
+     */
+    public void shutdown() {
+        ensureOwnerOrContainsThread();
+        if (!shutdown) {
+            shutdown = true;
+        }
+    }
+
+    /**
+     * Wait for all threads in the flock to finish executing their tasks. This method
+     * waits until all threads finish, the {@link #wakeup() wakeup} method is invoked,
+     * or the current thread is interrupted.
+     *
+     * <p> This method may only be invoked by the flock owner. The method trivially
+     * returns true when the flock is closed.
+     *
+     * <p> This method clears the effect of any previous invocations of the
+     * {@code wakeup} method.
+     *
+     * @return true if there are no threads in the flock, false if wakeup was invoked
+     * and there are unfinished threads
+     * @throws InterruptedException if interrupted while waiting
+     * @throws WrongThreadException if invoked by a thread that is not the owner
+     */
+    public boolean awaitAll() throws InterruptedException {
+        ensureOwner();
+
+        if (getAndSetPermit(false))
+            return (threadCount == 0);
+
+        while (threadCount > 0 && !permit) {
+            LockSupport.park();
+            if (Thread.interrupted())
+                throw new InterruptedException();
+        }
+        clearPermit();
+        return (threadCount == 0);
+    }
+
+    /**
+     * Wait, up to the given waiting timeout, for all threads in the flock to finish
+     * executing their tasks. This method waits until all threads finish, the {@link
+     * #wakeup() wakeup} method is invoked, the current thread is interrupted, or
+     * the timeout expires.
+     *
+     * <p> This method may only be invoked by the flock owner. The method trivially
+     * returns true when the flock is closed.
+     *
+     * <p> This method clears the effect of any previous invocations of the {@code wakeup}
+     * method.
+     *
+     * @param timeout the maximum duration to wait
+     * @return true if there are no threads in the flock, false if wakeup was invoked
+     * and there are unfinished threads
+     * @throws InterruptedException if interrupted while waiting
+     * @throws TimeoutException if the wait timed out
+     * @throws WrongThreadException if invoked by a thread that is not the owner
+     */
+    public boolean awaitAll(Duration timeout)
+            throws InterruptedException, TimeoutException {
+        Objects.requireNonNull(timeout);
+        ensureOwner();
+
+        if (getAndSetPermit(false))
+            return (threadCount == 0);
+
+        long startNanos = System.nanoTime();
+        long nanos = NANOSECONDS.convert(timeout);
+        long remainingNanos = nanos;
+        while (threadCount > 0 && remainingNanos > 0 && !permit) {
+            LockSupport.parkNanos(remainingNanos);
+            if (Thread.interrupted())
+                throw new InterruptedException();
+            remainingNanos = nanos - (System.nanoTime() - startNanos);
+        }
+
+        boolean done = (threadCount == 0);
+        if (!done && remainingNanos <= 0 && !permit) {
+            throw new TimeoutException();
+        } else {
+            clearPermit();
+            return done;
+        }
+    }
+
+    /**
+     * Causes the call to {@link #awaitAll()} or {@link #awaitAll(Duration)} by the
+     * {@linkplain #owner() owner} to return immediately.
+     *
+     * <p> If the owner is blocked in {@code awaitAll} then it will return immediately.
+     * If the owner is not blocked in {@code awaitAll} then its next call to wait
+     * will return immediately. The method does nothing when the flock is closed.
+     *
+     * @throws WrongThreadException if the current thread is not the owner or a thread
+     * contained in the flock
+     */
+    public void wakeup() {
+        ensureOwnerOrContainsThread();
+        if (!getAndSetPermit(true) && Thread.currentThread() != owner()) {
+            LockSupport.unpark(owner());
+        }
+    }
+
+    /**
+     * Closes this flock. This method first shuts down the flock to prevent
+     * new threads from starting. It then waits for the threads in the flock
+     * to finish executing their tasks. In other words, this method blocks until
+     * all threads in the flock finish.
+     *
+     * <p> This method may only be invoked by the flock owner.
+     *
+     * <p> If interrupted then this method continues to wait until all threads
+     * finish, before completing with the interrupt status set.
+     *
+     * <p> A ThreadFlock is intended to be used in a <em>structured manner</em>. If
+     * this method is called to close a flock before nested flocks are closed then it
+     * closes the nested flocks (in the reverse order that they were created in),
+     * closes this flock, and then throws {@code StructureViolationException}.
+     * Similarly, if this method is called to close a thread flock while executing with
+     * scoped value bindings, and the thread flock was created before the scoped values
+     * were bound, then {@code StructureViolationException} is thrown after closing the
+     * thread flock.
+     *
+     * @throws WrongThreadException if invoked by a thread that is not the owner
+     * @throws StructureViolationException if a structure violation was detected
+     */
+    public void close() {
+        ensureOwner();
+        if (closed)
+            return;
+
+        // shutdown, if not already shutdown
+        if (!shutdown)
+            shutdown = true;
+
+        // wait for threads to finish
+        boolean interrupted = false;
+        try {
+            while (threadCount > 0) {
+                LockSupport.park();
+                if (Thread.interrupted()) {
+                    interrupted = true;
+                }
+            }
+
+        } finally {
+            try {
+                container.close(); // may throw
+            } finally {
+                closed = true;
+                if (interrupted) Thread.currentThread().interrupt();
+            }
+        }
+    }
+
+    /**
+     * {@return true if the flock has been {@linkplain #shutdown() shut down}}
+     */
+    public boolean isShutdown() {
+        return shutdown;
+    }
+
+    /**
+     * {@return true if the flock has been {@linkplain #close() closed}}
+     */
+    public boolean isClosed() {
+        return closed;
+    }
+
+    /**
+     * {@return a stream of the threads in this flock}
+     * The elements of the stream are threads that were started in this flock
+     * but have not terminated. The stream will reflect the set of threads in the
+     * flock at some point at or since the creation of the stream. It may or may
+     * not reflect changes to the set of threads subsequent to creation of the
+     * stream.
+     */
+    public Stream<Thread> threads() {
+        return threads.stream();
+    }
+
+    /**
+     * Tests if this flock contains the given thread. This method returns {@code true}
+     * if the thread was started in this flock and has not finished. If the thread
+     * is not in this flock then it tests if the thread is in flocks owned by threads
+     * in this flock, essentially equivalent to invoking {@code containsThread} method
+     * on all flocks owned by the threads in this flock.
+     *
+     * @param thread the thread
+     * @return true if this flock contains the thread
+     */
+    public boolean containsThread(Thread thread) {
+        var c = JLA.threadContainer(thread);
+        if (c == this.container)
+            return true;
+        if (c != null && c != ThreadContainers.root()) {
+            var parent = c.parent();
+            while (parent != null) {
+                if (parent == this.container)
+                    return true;
+                parent = parent.parent();
+            }
+        }
+        return false;
+    }
+
+    @Override
+    public String toString() {
+        String id = Objects.toIdentityString(this);
+        if (name != null) {
+            return name + "/" + id;
+        } else {
+            return id;
+        }
+    }
+
+    /**
+     * A ThreadContainer backed by a ThreadFlock.
+     */
+    private static class ThreadContainerImpl extends ThreadContainer {
+        private final ThreadFlock flock;
+        private volatile Object key;
+        private boolean closing;
+
+        ThreadContainerImpl(ThreadFlock flock) {
+            super(/*shared*/ false);
+            this.flock = flock;
+        }
+
+        @Override
+        public ThreadContainerImpl push() {
+            // Virtual threads in the root containers may not be tracked so need
+            // to register container to ensure that it is found
+            if (!ThreadContainers.trackAllThreads()) {
+                Thread thread = Thread.currentThread();
+                if (thread.isVirtual()
+                        && JLA.threadContainer(thread) == ThreadContainers.root()) {
+                    this.key = ThreadContainers.registerContainer(this);
+                }
+            }
+            super.push();
+            return this;
+        }
+
+        /**
+         * Invoked by ThreadFlock.close when closing the flock. This method pops the
+         * container from the current thread's scope stack.
+         */
+        void close() {
+            assert Thread.currentThread() == owner();
+            if (!closing) {
+                closing = true;
+                boolean atTop = popForcefully(); // may block
+                Object key = this.key;
+                if (key != null)
+                    ThreadContainers.deregisterContainer(key);
+                if (!atTop)
+                    throw new StructureViolationException();
+            }
+        }
+
+        /**
+         * Invoked when an enclosing scope is closing. Invokes ThreadFlock.close to
+         * close the flock. This method does not pop the container from the current
+         * thread's scope stack.
+         */
+        @Override
+        protected boolean tryClose() {
+            assert Thread.currentThread() == owner();
+            if (!closing) {
+                closing = true;
+                flock.close();
+                Object key = this.key;
+                if (key != null)
+                    ThreadContainers.deregisterContainer(key);
+                return true;
+            } else {
+                assert false : "Should not get there";
+                return false;
+            }
+        }
+
+        @Override
+        public String name() {
+            return flock.name();
+        }
+        @Override
+        public long threadCount() {
+            return flock.threadCount();
+        }
+        @Override
+        public Stream<Thread> threads() {
+            return flock.threads().filter(Thread::isAlive);
+        }
+        @Override
+        public void onStart(Thread thread) {
+            flock.onStart(thread);
+        }
+        @Override
+        public void onExit(Thread thread) {
+            flock.onExit(thread);
+        }
+        @Override
+        public ScopedValueContainer.BindingsSnapshot scopedValueBindings() {
+            return flock.scopedValueBindings();
+        }
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/misc/ThreadTracker$ThreadRef.class b/tests/test_data/std/jdk/internal/misc/ThreadTracker$ThreadRef.class
new file mode 100644
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diff --git a/tests/test_data/std/jdk/internal/misc/ThreadTracker.class b/tests/test_data/std/jdk/internal/misc/ThreadTracker.class
new file mode 100644
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diff --git a/tests/test_data/std/jdk/internal/misc/ThreadTracker.java b/tests/test_data/std/jdk/internal/misc/ThreadTracker.java
new file mode 100644
index 00000000..67cf0783
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/misc/ThreadTracker.java
@@ -0,0 +1,93 @@
+/*
+ * Copyright (c) 2021, 2022, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package jdk.internal.misc;
+
+import java.util.Set;
+import java.util.concurrent.ConcurrentHashMap;
+
+/**
+ * Tracks threads to help detect reentrancy without using ThreadLocal variables.
+ * A thread invokes the {@code begin} or {@code tryBegin} methods at the start
+ * of a block, and the {@code end} method at the end of a block.
+ */
+public class ThreadTracker {
+
+    /**
+     * A reference to a Thread that is suitable for use as a key in a collection.
+     * The hashCode/equals methods do not invoke the Thread hashCode/equals method
+     * as they may run arbitrary code and/or leak references to Thread objects.
+     */
+    private record ThreadRef(Thread thread) {
+        @Override
+        public int hashCode() {
+            return Long.hashCode(thread.threadId());
+        }
+        @Override
+        public boolean equals(Object obj) {
+            return (obj instanceof ThreadRef other)
+                    && this.thread == other.thread;
+        }
+    }
+
+    private final Set<ThreadRef> threads = ConcurrentHashMap.newKeySet();
+
+    /**
+     * Adds the current thread to thread set if not already in the set.
+     * Returns a key to remove the thread or {@code null} if already in the set.
+     */
+    public Object tryBegin() {
+        var threadRef = new ThreadRef(Thread.currentThread());
+        return threads.add(threadRef) ? threadRef : null;
+    }
+
+    /**
+     * Adds the current thread to thread set if not already in the set.
+     * Returns a key to remove the thread.
+     */
+    public Object begin() {
+        var threadRef = new ThreadRef(Thread.currentThread());
+        boolean added = threads.add(threadRef);
+        assert added;
+        return threadRef;
+    }
+
+    /**
+     * Removes the thread identified by the key from the thread set.
+     */
+    public void end(Object key) {
+        var threadRef = (ThreadRef) key;
+        assert threadRef.thread() == Thread.currentThread();
+        boolean removed = threads.remove(threadRef);
+        assert removed;
+    }
+
+    /**
+     * Returns true if the given thread is tracked.
+     */
+    public boolean contains(Thread thread) {
+        var threadRef = new ThreadRef(thread);
+        return threads.contains(threadRef);
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/misc/Unsafe.class b/tests/test_data/std/jdk/internal/misc/Unsafe.class
new file mode 100644
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diff --git a/tests/test_data/std/jdk/internal/misc/Unsafe.java b/tests/test_data/std/jdk/internal/misc/Unsafe.java
new file mode 100644
index 00000000..ec6b7591
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/misc/Unsafe.java
@@ -0,0 +1,3865 @@
+/*
+ * Copyright (c) 2000, 2024, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package jdk.internal.misc;
+
+import jdk.internal.ref.Cleaner;
+import jdk.internal.vm.annotation.ForceInline;
+import jdk.internal.vm.annotation.IntrinsicCandidate;
+import sun.nio.ch.DirectBuffer;
+
+import java.lang.reflect.Field;
+import java.security.ProtectionDomain;
+
+import static jdk.internal.misc.UnsafeConstants.*;
+
+/**
+ * A collection of methods for performing low-level, unsafe operations.
+ * Although the class and all methods are public, use of this class is
+ * limited because only trusted code can obtain instances of it.
+ *
+ * <em>Note:</em> It is the responsibility of the caller to make sure
+ * arguments are checked before methods of this class are
+ * called. While some rudimentary checks are performed on the input,
+ * the checks are best effort and when performance is an overriding
+ * priority, as when methods of this class are optimized by the
+ * runtime compiler, some or all checks (if any) may be elided. Hence,
+ * the caller must not rely on the checks and corresponding
+ * exceptions!
+ *
+ * @author John R. Rose
+ * @see #getUnsafe
+ */
+
+public final class Unsafe {
+
+    private static native void registerNatives();
+    static {
+        registerNatives();
+    }
+
+    private Unsafe() {}
+
+    private static final Unsafe theUnsafe = new Unsafe();
+
+    /**
+     * Provides the caller with the capability of performing unsafe
+     * operations.
+     *
+     * <p>The returned {@code Unsafe} object should be carefully guarded
+     * by the caller, since it can be used to read and write data at arbitrary
+     * memory addresses.  It must never be passed to untrusted code.
+     *
+     * <p>Most methods in this class are very low-level, and correspond to a
+     * small number of hardware instructions (on typical machines).  Compilers
+     * are encouraged to optimize these methods accordingly.
+     *
+     * <p>Here is a suggested idiom for using unsafe operations:
+     *
+     * <pre> {@code
+     * class MyTrustedClass {
+     *   private static final Unsafe unsafe = Unsafe.getUnsafe();
+     *   ...
+     *   private long myCountAddress = ...;
+     *   public int getCount() { return unsafe.getByte(myCountAddress); }
+     * }}</pre>
+     *
+     * (It may assist compilers to make the local variable {@code final}.)
+     */
+    public static Unsafe getUnsafe() {
+        return theUnsafe;
+    }
+
+    //--- peek and poke operations
+    // (compilers should optimize these to memory ops)
+
+    // These work on object fields in the Java heap.
+    // They will not work on elements of packed arrays.
+
+    /**
+     * Fetches a value from a given Java variable.
+     * More specifically, fetches a field or array element within the given
+     * object {@code o} at the given offset, or (if {@code o} is null)
+     * from the memory address whose numerical value is the given offset.
+     * <p>
+     * The results are undefined unless one of the following cases is true:
+     * <ul>
+     * <li>The offset was obtained from {@link #objectFieldOffset} on
+     * the {@link java.lang.reflect.Field} of some Java field and the object
+     * referred to by {@code o} is of a class compatible with that
+     * field's class.
+     *
+     * <li>The offset and object reference {@code o} (either null or
+     * non-null) were both obtained via {@link #staticFieldOffset}
+     * and {@link #staticFieldBase} (respectively) from the
+     * reflective {@link Field} representation of some Java field.
+     *
+     * <li>The object referred to by {@code o} is an array, and the offset
+     * is an integer of the form {@code B+N*S}, where {@code N} is
+     * a valid index into the array, and {@code B} and {@code S} are
+     * the values obtained by {@link #arrayBaseOffset} and {@link
+     * #arrayIndexScale} (respectively) from the array's class.  The value
+     * referred to is the {@code N}<em>th</em> element of the array.
+     *
+     * </ul>
+     * <p>
+     * If one of the above cases is true, the call references a specific Java
+     * variable (field or array element).  However, the results are undefined
+     * if that variable is not in fact of the type returned by this method.
+     * <p>
+     * This method refers to a variable by means of two parameters, and so
+     * it provides (in effect) a <em>double-register</em> addressing mode
+     * for Java variables.  When the object reference is null, this method
+     * uses its offset as an absolute address.  This is similar in operation
+     * to methods such as {@link #getInt(long)}, which provide (in effect) a
+     * <em>single-register</em> addressing mode for non-Java variables.
+     * However, because Java variables may have a different layout in memory
+     * from non-Java variables, programmers should not assume that these
+     * two addressing modes are ever equivalent.  Also, programmers should
+     * remember that offsets from the double-register addressing mode cannot
+     * be portably confused with longs used in the single-register addressing
+     * mode.
+     *
+     * @param o Java heap object in which the variable resides, if any, else
+     *        null
+     * @param offset indication of where the variable resides in a Java heap
+     *        object, if any, else a memory address locating the variable
+     *        statically
+     * @return the value fetched from the indicated Java variable
+     * @throws RuntimeException No defined exceptions are thrown, not even
+     *         {@link NullPointerException}
+     */
+    @IntrinsicCandidate
+    public native int getInt(Object o, long offset);
+
+    /**
+     * Stores a value into a given Java variable.
+     * <p>
+     * The first two parameters are interpreted exactly as with
+     * {@link #getInt(Object, long)} to refer to a specific
+     * Java variable (field or array element).  The given value
+     * is stored into that variable.
+     * <p>
+     * The variable must be of the same type as the method
+     * parameter {@code x}.
+     *
+     * @param o Java heap object in which the variable resides, if any, else
+     *        null
+     * @param offset indication of where the variable resides in a Java heap
+     *        object, if any, else a memory address locating the variable
+     *        statically
+     * @param x the value to store into the indicated Java variable
+     * @throws RuntimeException No defined exceptions are thrown, not even
+     *         {@link NullPointerException}
+     */
+    @IntrinsicCandidate
+    public native void putInt(Object o, long offset, int x);
+
+    /**
+     * Fetches a reference value from a given Java variable.
+     * @see #getInt(Object, long)
+     */
+    @IntrinsicCandidate
+    public native Object getReference(Object o, long offset);
+
+    /**
+     * Stores a reference value into a given Java variable.
+     * <p>
+     * Unless the reference {@code x} being stored is either null
+     * or matches the field type, the results are undefined.
+     * If the reference {@code o} is non-null, card marks or
+     * other store barriers for that object (if the VM requires them)
+     * are updated.
+     * @see #putInt(Object, long, int)
+     */
+    @IntrinsicCandidate
+    public native void putReference(Object o, long offset, Object x);
+
+    /** @see #getInt(Object, long) */
+    @IntrinsicCandidate
+    public native boolean getBoolean(Object o, long offset);
+
+    /** @see #putInt(Object, long, int) */
+    @IntrinsicCandidate
+    public native void    putBoolean(Object o, long offset, boolean x);
+
+    /** @see #getInt(Object, long) */
+    @IntrinsicCandidate
+    public native byte    getByte(Object o, long offset);
+
+    /** @see #putInt(Object, long, int) */
+    @IntrinsicCandidate
+    public native void    putByte(Object o, long offset, byte x);
+
+    /** @see #getInt(Object, long) */
+    @IntrinsicCandidate
+    public native short   getShort(Object o, long offset);
+
+    /** @see #putInt(Object, long, int) */
+    @IntrinsicCandidate
+    public native void    putShort(Object o, long offset, short x);
+
+    /** @see #getInt(Object, long) */
+    @IntrinsicCandidate
+    public native char    getChar(Object o, long offset);
+
+    /** @see #putInt(Object, long, int) */
+    @IntrinsicCandidate
+    public native void    putChar(Object o, long offset, char x);
+
+    /** @see #getInt(Object, long) */
+    @IntrinsicCandidate
+    public native long    getLong(Object o, long offset);
+
+    /** @see #putInt(Object, long, int) */
+    @IntrinsicCandidate
+    public native void    putLong(Object o, long offset, long x);
+
+    /** @see #getInt(Object, long) */
+    @IntrinsicCandidate
+    public native float   getFloat(Object o, long offset);
+
+    /** @see #putInt(Object, long, int) */
+    @IntrinsicCandidate
+    public native void    putFloat(Object o, long offset, float x);
+
+    /** @see #getInt(Object, long) */
+    @IntrinsicCandidate
+    public native double  getDouble(Object o, long offset);
+
+    /** @see #putInt(Object, long, int) */
+    @IntrinsicCandidate
+    public native void    putDouble(Object o, long offset, double x);
+
+    /**
+     * Fetches a native pointer from a given memory address.  If the address is
+     * zero, or does not point into a block obtained from {@link
+     * #allocateMemory}, the results are undefined.
+     *
+     * <p>If the native pointer is less than 64 bits wide, it is extended as
+     * an unsigned number to a Java long.  The pointer may be indexed by any
+     * given byte offset, simply by adding that offset (as a simple integer) to
+     * the long representing the pointer.  The number of bytes actually read
+     * from the target address may be determined by consulting {@link
+     * #addressSize}.
+     *
+     * @see #allocateMemory
+     * @see #getInt(Object, long)
+     */
+    @ForceInline
+    public long getAddress(Object o, long offset) {
+        if (ADDRESS_SIZE == 4) {
+            return Integer.toUnsignedLong(getInt(o, offset));
+        } else {
+            return getLong(o, offset);
+        }
+    }
+
+    /**
+     * Stores a native pointer into a given memory address.  If the address is
+     * zero, or does not point into a block obtained from {@link
+     * #allocateMemory}, the results are undefined.
+     *
+     * <p>The number of bytes actually written at the target address may be
+     * determined by consulting {@link #addressSize}.
+     *
+     * @see #allocateMemory
+     * @see #putInt(Object, long, int)
+     */
+    @ForceInline
+    public void putAddress(Object o, long offset, long x) {
+        if (ADDRESS_SIZE == 4) {
+            putInt(o, offset, (int)x);
+        } else {
+            putLong(o, offset, x);
+        }
+    }
+
+    // These read VM internal data.
+
+    /**
+     * Fetches an uncompressed reference value from a given native variable
+     * ignoring the VM's compressed references mode.
+     *
+     * @param address a memory address locating the variable
+     * @return the value fetched from the indicated native variable
+     */
+    public native Object getUncompressedObject(long address);
+
+    // These work on values in the C heap.
+
+    /**
+     * Fetches a value from a given memory address.  If the address is zero, or
+     * does not point into a block obtained from {@link #allocateMemory}, the
+     * results are undefined.
+     *
+     * @see #allocateMemory
+     */
+    @ForceInline
+    public byte getByte(long address) {
+        return getByte(null, address);
+    }
+
+    /**
+     * Stores a value into a given memory address.  If the address is zero, or
+     * does not point into a block obtained from {@link #allocateMemory}, the
+     * results are undefined.
+     *
+     * @see #getByte(long)
+     */
+    @ForceInline
+    public void putByte(long address, byte x) {
+        putByte(null, address, x);
+    }
+
+    /** @see #getByte(long) */
+    @ForceInline
+    public short getShort(long address) {
+        return getShort(null, address);
+    }
+
+    /** @see #putByte(long, byte) */
+    @ForceInline
+    public void putShort(long address, short x) {
+        putShort(null, address, x);
+    }
+
+    /** @see #getByte(long) */
+    @ForceInline
+    public char getChar(long address) {
+        return getChar(null, address);
+    }
+
+    /** @see #putByte(long, byte) */
+    @ForceInline
+    public void putChar(long address, char x) {
+        putChar(null, address, x);
+    }
+
+    /** @see #getByte(long) */
+    @ForceInline
+    public int getInt(long address) {
+        return getInt(null, address);
+    }
+
+    /** @see #putByte(long, byte) */
+    @ForceInline
+    public void putInt(long address, int x) {
+        putInt(null, address, x);
+    }
+
+    /** @see #getByte(long) */
+    @ForceInline
+    public long getLong(long address) {
+        return getLong(null, address);
+    }
+
+    /** @see #putByte(long, byte) */
+    @ForceInline
+    public void putLong(long address, long x) {
+        putLong(null, address, x);
+    }
+
+    /** @see #getByte(long) */
+    @ForceInline
+    public float getFloat(long address) {
+        return getFloat(null, address);
+    }
+
+    /** @see #putByte(long, byte) */
+    @ForceInline
+    public void putFloat(long address, float x) {
+        putFloat(null, address, x);
+    }
+
+    /** @see #getByte(long) */
+    @ForceInline
+    public double getDouble(long address) {
+        return getDouble(null, address);
+    }
+
+    /** @see #putByte(long, byte) */
+    @ForceInline
+    public void putDouble(long address, double x) {
+        putDouble(null, address, x);
+    }
+
+    /** @see #getAddress(Object, long) */
+    @ForceInline
+    public long getAddress(long address) {
+        return getAddress(null, address);
+    }
+
+    /** @see #putAddress(Object, long, long) */
+    @ForceInline
+    public void putAddress(long address, long x) {
+        putAddress(null, address, x);
+    }
+
+
+
+    //--- helper methods for validating various types of objects/values
+
+    /**
+     * Create an exception reflecting that some of the input was invalid
+     *
+     * <em>Note:</em> It is the responsibility of the caller to make
+     * sure arguments are checked before the methods are called. While
+     * some rudimentary checks are performed on the input, the checks
+     * are best effort and when performance is an overriding priority,
+     * as when methods of this class are optimized by the runtime
+     * compiler, some or all checks (if any) may be elided. Hence, the
+     * caller must not rely on the checks and corresponding
+     * exceptions!
+     *
+     * @return an exception object
+     */
+    private RuntimeException invalidInput() {
+        return new IllegalArgumentException();
+    }
+
+    /**
+     * Check if a value is 32-bit clean (32 MSB are all zero)
+     *
+     * @param value the 64-bit value to check
+     *
+     * @return true if the value is 32-bit clean
+     */
+    private boolean is32BitClean(long value) {
+        return value >>> 32 == 0;
+    }
+
+    /**
+     * Check the validity of a size (the equivalent of a size_t)
+     *
+     * @throws RuntimeException if the size is invalid
+     *         (<em>Note:</em> after optimization, invalid inputs may
+     *         go undetected, which will lead to unpredictable
+     *         behavior)
+     */
+    private void checkSize(long size) {
+        if (ADDRESS_SIZE == 4) {
+            // Note: this will also check for negative sizes
+            if (!is32BitClean(size)) {
+                throw invalidInput();
+            }
+        } else if (size < 0) {
+            throw invalidInput();
+        }
+    }
+
+    /**
+     * Check the validity of a native address (the equivalent of void*)
+     *
+     * @throws RuntimeException if the address is invalid
+     *         (<em>Note:</em> after optimization, invalid inputs may
+     *         go undetected, which will lead to unpredictable
+     *         behavior)
+     */
+    private void checkNativeAddress(long address) {
+        if (ADDRESS_SIZE == 4) {
+            // Accept both zero and sign extended pointers. A valid
+            // pointer will, after the +1 below, either have produced
+            // the value 0x0 or 0x1. Masking off the low bit allows
+            // for testing against 0.
+            if ((((address >> 32) + 1) & ~1) != 0) {
+                throw invalidInput();
+            }
+        }
+    }
+
+    /**
+     * Check the validity of an offset, relative to a base object
+     *
+     * @param o the base object
+     * @param offset the offset to check
+     *
+     * @throws RuntimeException if the size is invalid
+     *         (<em>Note:</em> after optimization, invalid inputs may
+     *         go undetected, which will lead to unpredictable
+     *         behavior)
+     */
+    private void checkOffset(Object o, long offset) {
+        if (ADDRESS_SIZE == 4) {
+            // Note: this will also check for negative offsets
+            if (!is32BitClean(offset)) {
+                throw invalidInput();
+            }
+        } else if (offset < 0) {
+            throw invalidInput();
+        }
+    }
+
+    /**
+     * Check the validity of a double-register pointer
+     *
+     * Note: This code deliberately does *not* check for NPE for (at
+     * least) three reasons:
+     *
+     * 1) NPE is not just NULL/0 - there is a range of values all
+     * resulting in an NPE, which is not trivial to check for
+     *
+     * 2) It is the responsibility of the callers of Unsafe methods
+     * to verify the input, so throwing an exception here is not really
+     * useful - passing in a NULL pointer is a critical error and the
+     * must not expect an exception to be thrown anyway.
+     *
+     * 3) the actual operations will detect NULL pointers anyway by
+     * means of traps and signals (like SIGSEGV).
+     *
+     * @param o Java heap object, or null
+     * @param offset indication of where the variable resides in a Java heap
+     *        object, if any, else a memory address locating the variable
+     *        statically
+     *
+     * @throws RuntimeException if the pointer is invalid
+     *         (<em>Note:</em> after optimization, invalid inputs may
+     *         go undetected, which will lead to unpredictable
+     *         behavior)
+     */
+    private void checkPointer(Object o, long offset) {
+        if (o == null) {
+            checkNativeAddress(offset);
+        } else {
+            checkOffset(o, offset);
+        }
+    }
+
+    /**
+     * Check if a type is a primitive array type
+     *
+     * @param c the type to check
+     *
+     * @return true if the type is a primitive array type
+     */
+    private void checkPrimitiveArray(Class<?> c) {
+        Class<?> componentType = c.getComponentType();
+        if (componentType == null || !componentType.isPrimitive()) {
+            throw invalidInput();
+        }
+    }
+
+    /**
+     * Check that a pointer is a valid primitive array type pointer
+     *
+     * Note: pointers off-heap are considered to be primitive arrays
+     *
+     * @throws RuntimeException if the pointer is invalid
+     *         (<em>Note:</em> after optimization, invalid inputs may
+     *         go undetected, which will lead to unpredictable
+     *         behavior)
+     */
+    private void checkPrimitivePointer(Object o, long offset) {
+        checkPointer(o, offset);
+
+        if (o != null) {
+            // If on heap, it must be a primitive array
+            checkPrimitiveArray(o.getClass());
+        }
+    }
+
+
+    //--- wrappers for malloc, realloc, free:
+
+    /**
+     * Round up allocation size to a multiple of HeapWordSize.
+     */
+    private long alignToHeapWordSize(long bytes) {
+        if (bytes >= 0) {
+            return (bytes + ADDRESS_SIZE - 1) & ~(ADDRESS_SIZE - 1);
+        } else {
+            throw invalidInput();
+        }
+    }
+
+    /**
+     * Allocates a new block of native memory, of the given size in bytes.  The
+     * contents of the memory are uninitialized; they will generally be
+     * garbage.  The resulting native pointer will be zero if and only if the
+     * requested size is zero.  The resulting native pointer will be aligned for
+     * all value types.   Dispose of this memory by calling {@link #freeMemory}
+     * or resize it with {@link #reallocateMemory}.
+     *
+     * <em>Note:</em> It is the responsibility of the caller to make
+     * sure arguments are checked before the methods are called. While
+     * some rudimentary checks are performed on the input, the checks
+     * are best effort and when performance is an overriding priority,
+     * as when methods of this class are optimized by the runtime
+     * compiler, some or all checks (if any) may be elided. Hence, the
+     * caller must not rely on the checks and corresponding
+     * exceptions!
+     *
+     * @throws RuntimeException if the size is negative or too large
+     *         for the native size_t type
+     *
+     * @throws OutOfMemoryError if the allocation is refused by the system
+     *
+     * @see #getByte(long)
+     * @see #putByte(long, byte)
+     */
+    public long allocateMemory(long bytes) {
+        bytes = alignToHeapWordSize(bytes);
+
+        allocateMemoryChecks(bytes);
+
+        if (bytes == 0) {
+            return 0;
+        }
+
+        long p = allocateMemory0(bytes);
+        if (p == 0) {
+            throw new OutOfMemoryError("Unable to allocate " + bytes + " bytes");
+        }
+
+        return p;
+    }
+
+    /**
+     * Validate the arguments to allocateMemory
+     *
+     * @throws RuntimeException if the arguments are invalid
+     *         (<em>Note:</em> after optimization, invalid inputs may
+     *         go undetected, which will lead to unpredictable
+     *         behavior)
+     */
+    private void allocateMemoryChecks(long bytes) {
+        checkSize(bytes);
+    }
+
+    /**
+     * Resizes a new block of native memory, to the given size in bytes.  The
+     * contents of the new block past the size of the old block are
+     * uninitialized; they will generally be garbage.  The resulting native
+     * pointer will be zero if and only if the requested size is zero.  The
+     * resulting native pointer will be aligned for all value types.  Dispose
+     * of this memory by calling {@link #freeMemory}, or resize it with {@link
+     * #reallocateMemory}.  The address passed to this method may be null, in
+     * which case an allocation will be performed.
+     *
+     * <em>Note:</em> It is the responsibility of the caller to make
+     * sure arguments are checked before the methods are called. While
+     * some rudimentary checks are performed on the input, the checks
+     * are best effort and when performance is an overriding priority,
+     * as when methods of this class are optimized by the runtime
+     * compiler, some or all checks (if any) may be elided. Hence, the
+     * caller must not rely on the checks and corresponding
+     * exceptions!
+     *
+     * @throws RuntimeException if the size is negative or too large
+     *         for the native size_t type
+     *
+     * @throws OutOfMemoryError if the allocation is refused by the system
+     *
+     * @see #allocateMemory
+     */
+    public long reallocateMemory(long address, long bytes) {
+        bytes = alignToHeapWordSize(bytes);
+
+        reallocateMemoryChecks(address, bytes);
+
+        if (bytes == 0) {
+            freeMemory(address);
+            return 0;
+        }
+
+        long p = (address == 0) ? allocateMemory0(bytes) : reallocateMemory0(address, bytes);
+        if (p == 0) {
+            throw new OutOfMemoryError("Unable to allocate " + bytes + " bytes");
+        }
+
+        return p;
+    }
+
+    /**
+     * Validate the arguments to reallocateMemory
+     *
+     * @throws RuntimeException if the arguments are invalid
+     *         (<em>Note:</em> after optimization, invalid inputs may
+     *         go undetected, which will lead to unpredictable
+     *         behavior)
+     */
+    private void reallocateMemoryChecks(long address, long bytes) {
+        checkPointer(null, address);
+        checkSize(bytes);
+    }
+
+    /**
+     * Sets all bytes in a given block of memory to a fixed value
+     * (usually zero).
+     *
+     * <p>This method determines a block's base address by means of two parameters,
+     * and so it provides (in effect) a <em>double-register</em> addressing mode,
+     * as discussed in {@link #getInt(Object,long)}.  When the object reference is null,
+     * the offset supplies an absolute base address.
+     *
+     * <p>The stores are in coherent (atomic) units of a size determined
+     * by the address and length parameters.  If the effective address and
+     * length are all even modulo 8, the stores take place in 'long' units.
+     * If the effective address and length are (resp.) even modulo 4 or 2,
+     * the stores take place in units of 'int' or 'short'.
+     *
+     * <em>Note:</em> It is the responsibility of the caller to make
+     * sure arguments are checked before the methods are called. While
+     * some rudimentary checks are performed on the input, the checks
+     * are best effort and when performance is an overriding priority,
+     * as when methods of this class are optimized by the runtime
+     * compiler, some or all checks (if any) may be elided. Hence, the
+     * caller must not rely on the checks and corresponding
+     * exceptions!
+     *
+     * @throws RuntimeException if any of the arguments is invalid
+     *
+     * @since 1.7
+     */
+    public void setMemory(Object o, long offset, long bytes, byte value) {
+        setMemoryChecks(o, offset, bytes, value);
+
+        if (bytes == 0) {
+            return;
+        }
+
+        setMemory0(o, offset, bytes, value);
+    }
+
+    /**
+     * Sets all bytes in a given block of memory to a fixed value
+     * (usually zero).  This provides a <em>single-register</em> addressing mode,
+     * as discussed in {@link #getInt(Object,long)}.
+     *
+     * <p>Equivalent to {@code setMemory(null, address, bytes, value)}.
+     */
+    public void setMemory(long address, long bytes, byte value) {
+        setMemory(null, address, bytes, value);
+    }
+
+    /**
+     * Validate the arguments to setMemory
+     *
+     * @throws RuntimeException if the arguments are invalid
+     *         (<em>Note:</em> after optimization, invalid inputs may
+     *         go undetected, which will lead to unpredictable
+     *         behavior)
+     */
+    private void setMemoryChecks(Object o, long offset, long bytes, byte value) {
+        checkPrimitivePointer(o, offset);
+        checkSize(bytes);
+    }
+
+    /**
+     * Sets all bytes in a given block of memory to a copy of another
+     * block.
+     *
+     * <p>This method determines each block's base address by means of two parameters,
+     * and so it provides (in effect) a <em>double-register</em> addressing mode,
+     * as discussed in {@link #getInt(Object,long)}.  When the object reference is null,
+     * the offset supplies an absolute base address.
+     *
+     * <p>The transfers are in coherent (atomic) units of a size determined
+     * by the address and length parameters.  If the effective addresses and
+     * length are all even modulo 8, the transfer takes place in 'long' units.
+     * If the effective addresses and length are (resp.) even modulo 4 or 2,
+     * the transfer takes place in units of 'int' or 'short'.
+     *
+     * <em>Note:</em> It is the responsibility of the caller to make
+     * sure arguments are checked before the methods are called. While
+     * some rudimentary checks are performed on the input, the checks
+     * are best effort and when performance is an overriding priority,
+     * as when methods of this class are optimized by the runtime
+     * compiler, some or all checks (if any) may be elided. Hence, the
+     * caller must not rely on the checks and corresponding
+     * exceptions!
+     *
+     * @throws RuntimeException if any of the arguments is invalid
+     *
+     * @since 1.7
+     */
+    public void copyMemory(Object srcBase, long srcOffset,
+                           Object destBase, long destOffset,
+                           long bytes) {
+        copyMemoryChecks(srcBase, srcOffset, destBase, destOffset, bytes);
+
+        if (bytes == 0) {
+            return;
+        }
+
+        copyMemory0(srcBase, srcOffset, destBase, destOffset, bytes);
+    }
+
+    /**
+     * Sets all bytes in a given block of memory to a copy of another
+     * block.  This provides a <em>single-register</em> addressing mode,
+     * as discussed in {@link #getInt(Object,long)}.
+     *
+     * Equivalent to {@code copyMemory(null, srcAddress, null, destAddress, bytes)}.
+     */
+    public void copyMemory(long srcAddress, long destAddress, long bytes) {
+        copyMemory(null, srcAddress, null, destAddress, bytes);
+    }
+
+    /**
+     * Validate the arguments to copyMemory
+     *
+     * @throws RuntimeException if any of the arguments is invalid
+     *         (<em>Note:</em> after optimization, invalid inputs may
+     *         go undetected, which will lead to unpredictable
+     *         behavior)
+     */
+    private void copyMemoryChecks(Object srcBase, long srcOffset,
+                                  Object destBase, long destOffset,
+                                  long bytes) {
+        checkSize(bytes);
+        checkPrimitivePointer(srcBase, srcOffset);
+        checkPrimitivePointer(destBase, destOffset);
+    }
+
+    /**
+     * Copies all elements from one block of memory to another block,
+     * *unconditionally* byte swapping the elements on the fly.
+     *
+     * <p>This method determines each block's base address by means of two parameters,
+     * and so it provides (in effect) a <em>double-register</em> addressing mode,
+     * as discussed in {@link #getInt(Object,long)}.  When the object reference is null,
+     * the offset supplies an absolute base address.
+     *
+     * <em>Note:</em> It is the responsibility of the caller to make
+     * sure arguments are checked before the methods are called. While
+     * some rudimentary checks are performed on the input, the checks
+     * are best effort and when performance is an overriding priority,
+     * as when methods of this class are optimized by the runtime
+     * compiler, some or all checks (if any) may be elided. Hence, the
+     * caller must not rely on the checks and corresponding
+     * exceptions!
+     *
+     * @throws RuntimeException if any of the arguments is invalid
+     *
+     * @since 9
+     */
+    public void copySwapMemory(Object srcBase, long srcOffset,
+                               Object destBase, long destOffset,
+                               long bytes, long elemSize) {
+        copySwapMemoryChecks(srcBase, srcOffset, destBase, destOffset, bytes, elemSize);
+
+        if (bytes == 0) {
+            return;
+        }
+
+        copySwapMemory0(srcBase, srcOffset, destBase, destOffset, bytes, elemSize);
+    }
+
+    private void copySwapMemoryChecks(Object srcBase, long srcOffset,
+                                      Object destBase, long destOffset,
+                                      long bytes, long elemSize) {
+        checkSize(bytes);
+
+        if (elemSize != 2 && elemSize != 4 && elemSize != 8) {
+            throw invalidInput();
+        }
+        if (bytes % elemSize != 0) {
+            throw invalidInput();
+        }
+
+        checkPrimitivePointer(srcBase, srcOffset);
+        checkPrimitivePointer(destBase, destOffset);
+    }
+
+    /**
+     * Copies all elements from one block of memory to another block, byte swapping the
+     * elements on the fly.
+     *
+     * This provides a <em>single-register</em> addressing mode, as
+     * discussed in {@link #getInt(Object,long)}.
+     *
+     * Equivalent to {@code copySwapMemory(null, srcAddress, null, destAddress, bytes, elemSize)}.
+     */
+    public void copySwapMemory(long srcAddress, long destAddress, long bytes, long elemSize) {
+        copySwapMemory(null, srcAddress, null, destAddress, bytes, elemSize);
+    }
+
+    /**
+     * Disposes of a block of native memory, as obtained from {@link
+     * #allocateMemory} or {@link #reallocateMemory}.  The address passed to
+     * this method may be null, in which case no action is taken.
+     *
+     * <em>Note:</em> It is the responsibility of the caller to make
+     * sure arguments are checked before the methods are called. While
+     * some rudimentary checks are performed on the input, the checks
+     * are best effort and when performance is an overriding priority,
+     * as when methods of this class are optimized by the runtime
+     * compiler, some or all checks (if any) may be elided. Hence, the
+     * caller must not rely on the checks and corresponding
+     * exceptions!
+     *
+     * @throws RuntimeException if any of the arguments is invalid
+     *
+     * @see #allocateMemory
+     */
+    public void freeMemory(long address) {
+        freeMemoryChecks(address);
+
+        if (address == 0) {
+            return;
+        }
+
+        freeMemory0(address);
+    }
+
+    /**
+     * Validate the arguments to freeMemory
+     *
+     * @throws RuntimeException if the arguments are invalid
+     *         (<em>Note:</em> after optimization, invalid inputs may
+     *         go undetected, which will lead to unpredictable
+     *         behavior)
+     */
+    private void freeMemoryChecks(long address) {
+        checkPointer(null, address);
+    }
+
+    /**
+     * Ensure writeback of a specified virtual memory address range
+     * from cache to physical memory. All bytes in the address range
+     * are guaranteed to have been written back to physical memory on
+     * return from this call i.e. subsequently executed store
+     * instructions are guaranteed not to be visible before the
+     * writeback is completed.
+     *
+     * @param address
+     *        the lowest byte address that must be guaranteed written
+     *        back to memory. bytes at lower addresses may also be
+     *        written back.
+     *
+     * @param length
+     *        the length in bytes of the region starting at address
+     *        that must be guaranteed written back to memory.
+     *
+     * @throws RuntimeException if memory writeback is not supported
+     *         on the current hardware of if the arguments are invalid.
+     *         (<em>Note:</em> after optimization, invalid inputs may
+     *         go undetected, which will lead to unpredictable
+     *         behavior)
+     *
+     * @since 14
+     */
+
+    public void writebackMemory(long address, long length) {
+        checkWritebackEnabled();
+        checkWritebackMemory(address, length);
+
+        // perform any required pre-writeback barrier
+        writebackPreSync0();
+
+        // write back one cache line at a time
+        long line = dataCacheLineAlignDown(address);
+        long end = address + length;
+        while (line < end) {
+            writeback0(line);
+            line += dataCacheLineFlushSize();
+        }
+
+        // perform any required post-writeback barrier
+        writebackPostSync0();
+    }
+
+    /**
+     * Validate the arguments to writebackMemory
+     *
+     * @throws RuntimeException if the arguments are invalid
+     *         (<em>Note:</em> after optimization, invalid inputs may
+     *         go undetected, which will lead to unpredictable
+     *         behavior)
+     */
+    private void checkWritebackMemory(long address, long length) {
+        checkNativeAddress(address);
+        checkSize(length);
+    }
+
+    /**
+     * Validate that the current hardware supports memory writeback.
+     * (<em>Note:</em> this is a belt and braces check.  Clients are
+     * expected to test whether writeback is enabled by calling
+     * ({@link isWritebackEnabled #isWritebackEnabled} and avoid
+     * calling method {@link writeback #writeback} if it is disabled).
+     *
+     *
+     * @throws RuntimeException if memory writeback is not supported
+     */
+    private void checkWritebackEnabled() {
+        if (!isWritebackEnabled()) {
+            throw new RuntimeException("writebackMemory not enabled!");
+        }
+    }
+
+    /**
+     * force writeback of an individual cache line.
+     *
+     * @param address
+     *        the start address of the cache line to be written back
+     */
+    @IntrinsicCandidate
+    private native void writeback0(long address);
+
+     /**
+      * Serialize writeback operations relative to preceding memory writes.
+      */
+    @IntrinsicCandidate
+    private native void writebackPreSync0();
+
+     /**
+      * Serialize writeback operations relative to following memory writes.
+      */
+    @IntrinsicCandidate
+    private native void writebackPostSync0();
+
+    //--- random queries
+
+    /**
+     * This constant differs from all results that will ever be returned from
+     * {@link #staticFieldOffset}, {@link #objectFieldOffset},
+     * or {@link #arrayBaseOffset}.
+     */
+    public static final int INVALID_FIELD_OFFSET = -1;
+
+    /**
+     * Reports the location of a given field in the storage allocation of its
+     * class.  Do not expect to perform any sort of arithmetic on this offset;
+     * it is just a cookie which is passed to the unsafe heap memory accessors.
+     *
+     * <p>Any given field will always have the same offset and base, and no
+     * two distinct fields of the same class will ever have the same offset
+     * and base.
+     *
+     * <p>As of 1.4.1, offsets for fields are represented as long values,
+     * although the Sun JVM does not use the most significant 32 bits.
+     * However, JVM implementations which store static fields at absolute
+     * addresses can use long offsets and null base pointers to express
+     * the field locations in a form usable by {@link #getInt(Object,long)}.
+     * Therefore, code which will be ported to such JVMs on 64-bit platforms
+     * must preserve all bits of static field offsets.
+     * @see #getInt(Object, long)
+     */
+    public long objectFieldOffset(Field f) {
+        if (f == null) {
+            throw new NullPointerException();
+        }
+
+        return objectFieldOffset0(f);
+    }
+
+    /**
+     * Reports the location of the field with a given name in the storage
+     * allocation of its class.
+     *
+     * @throws NullPointerException if any parameter is {@code null}.
+     * @throws InternalError if there is no field named {@code name} declared
+     *         in class {@code c}, i.e., if {@code c.getDeclaredField(name)}
+     *         would throw {@code java.lang.NoSuchFieldException}.
+     *
+     * @see #objectFieldOffset(Field)
+     */
+    public long objectFieldOffset(Class<?> c, String name) {
+        if (c == null || name == null) {
+            throw new NullPointerException();
+        }
+
+        return objectFieldOffset1(c, name);
+    }
+
+    /**
+     * Reports the location of a given static field, in conjunction with {@link
+     * #staticFieldBase}.
+     * <p>Do not expect to perform any sort of arithmetic on this offset;
+     * it is just a cookie which is passed to the unsafe heap memory accessors.
+     *
+     * <p>Any given field will always have the same offset, and no two distinct
+     * fields of the same class will ever have the same offset.
+     *
+     * <p>As of 1.4.1, offsets for fields are represented as long values,
+     * although the Sun JVM does not use the most significant 32 bits.
+     * It is hard to imagine a JVM technology which needs more than
+     * a few bits to encode an offset within a non-array object,
+     * However, for consistency with other methods in this class,
+     * this method reports its result as a long value.
+     * @see #getInt(Object, long)
+     */
+    public long staticFieldOffset(Field f) {
+        if (f == null) {
+            throw new NullPointerException();
+        }
+
+        return staticFieldOffset0(f);
+    }
+
+    /**
+     * Reports the location of a given static field, in conjunction with {@link
+     * #staticFieldOffset}.
+     * <p>Fetch the base "Object", if any, with which static fields of the
+     * given class can be accessed via methods like {@link #getInt(Object,
+     * long)}.  This value may be null.  This value may refer to an object
+     * which is a "cookie", not guaranteed to be a real Object, and it should
+     * not be used in any way except as argument to the get and put routines in
+     * this class.
+     */
+    public Object staticFieldBase(Field f) {
+        if (f == null) {
+            throw new NullPointerException();
+        }
+
+        return staticFieldBase0(f);
+    }
+
+    /**
+     * Detects if the given class may need to be initialized. This is often
+     * needed in conjunction with obtaining the static field base of a
+     * class.
+     * @return false only if a call to {@code ensureClassInitialized} would have no effect
+     */
+    public boolean shouldBeInitialized(Class<?> c) {
+        if (c == null) {
+            throw new NullPointerException();
+        }
+
+        return shouldBeInitialized0(c);
+    }
+
+    /**
+     * Ensures the given class has been initialized (see JVMS-5.5 for details).
+     * This is often needed in conjunction with obtaining the static field base
+     * of a class.
+     *
+     * The call returns when either class {@code c} is fully initialized or
+     * class {@code c} is being initialized and the call is performed from
+     * the initializing thread. In the latter case a subsequent call to
+     * {@link #shouldBeInitialized} will return {@code true}.
+     */
+    public void ensureClassInitialized(Class<?> c) {
+        if (c == null) {
+            throw new NullPointerException();
+        }
+
+        ensureClassInitialized0(c);
+    }
+
+    /**
+     * Reports the offset of the first element in the storage allocation of a
+     * given array class.  If {@link #arrayIndexScale} returns a non-zero value
+     * for the same class, you may use that scale factor, together with this
+     * base offset, to form new offsets to access elements of arrays of the
+     * given class.
+     *
+     * @see #getInt(Object, long)
+     * @see #putInt(Object, long, int)
+     */
+    public int arrayBaseOffset(Class<?> arrayClass) {
+        if (arrayClass == null) {
+            throw new NullPointerException();
+        }
+
+        return arrayBaseOffset0(arrayClass);
+    }
+
+
+    /** The value of {@code arrayBaseOffset(boolean[].class)} */
+    public static final int ARRAY_BOOLEAN_BASE_OFFSET
+            = theUnsafe.arrayBaseOffset(boolean[].class);
+
+    /** The value of {@code arrayBaseOffset(byte[].class)} */
+    public static final int ARRAY_BYTE_BASE_OFFSET
+            = theUnsafe.arrayBaseOffset(byte[].class);
+
+    /** The value of {@code arrayBaseOffset(short[].class)} */
+    public static final int ARRAY_SHORT_BASE_OFFSET
+            = theUnsafe.arrayBaseOffset(short[].class);
+
+    /** The value of {@code arrayBaseOffset(char[].class)} */
+    public static final int ARRAY_CHAR_BASE_OFFSET
+            = theUnsafe.arrayBaseOffset(char[].class);
+
+    /** The value of {@code arrayBaseOffset(int[].class)} */
+    public static final int ARRAY_INT_BASE_OFFSET
+            = theUnsafe.arrayBaseOffset(int[].class);
+
+    /** The value of {@code arrayBaseOffset(long[].class)} */
+    public static final int ARRAY_LONG_BASE_OFFSET
+            = theUnsafe.arrayBaseOffset(long[].class);
+
+    /** The value of {@code arrayBaseOffset(float[].class)} */
+    public static final int ARRAY_FLOAT_BASE_OFFSET
+            = theUnsafe.arrayBaseOffset(float[].class);
+
+    /** The value of {@code arrayBaseOffset(double[].class)} */
+    public static final int ARRAY_DOUBLE_BASE_OFFSET
+            = theUnsafe.arrayBaseOffset(double[].class);
+
+    /** The value of {@code arrayBaseOffset(Object[].class)} */
+    public static final int ARRAY_OBJECT_BASE_OFFSET
+            = theUnsafe.arrayBaseOffset(Object[].class);
+
+    /**
+     * Reports the scale factor for addressing elements in the storage
+     * allocation of a given array class.  However, arrays of "narrow" types
+     * will generally not work properly with accessors like {@link
+     * #getByte(Object, long)}, so the scale factor for such classes is reported
+     * as zero.
+     *
+     * @see #arrayBaseOffset
+     * @see #getInt(Object, long)
+     * @see #putInt(Object, long, int)
+     */
+    public int arrayIndexScale(Class<?> arrayClass) {
+        if (arrayClass == null) {
+            throw new NullPointerException();
+        }
+
+        return arrayIndexScale0(arrayClass);
+    }
+
+
+    /** The value of {@code arrayIndexScale(boolean[].class)} */
+    public static final int ARRAY_BOOLEAN_INDEX_SCALE
+            = theUnsafe.arrayIndexScale(boolean[].class);
+
+    /** The value of {@code arrayIndexScale(byte[].class)} */
+    public static final int ARRAY_BYTE_INDEX_SCALE
+            = theUnsafe.arrayIndexScale(byte[].class);
+
+    /** The value of {@code arrayIndexScale(short[].class)} */
+    public static final int ARRAY_SHORT_INDEX_SCALE
+            = theUnsafe.arrayIndexScale(short[].class);
+
+    /** The value of {@code arrayIndexScale(char[].class)} */
+    public static final int ARRAY_CHAR_INDEX_SCALE
+            = theUnsafe.arrayIndexScale(char[].class);
+
+    /** The value of {@code arrayIndexScale(int[].class)} */
+    public static final int ARRAY_INT_INDEX_SCALE
+            = theUnsafe.arrayIndexScale(int[].class);
+
+    /** The value of {@code arrayIndexScale(long[].class)} */
+    public static final int ARRAY_LONG_INDEX_SCALE
+            = theUnsafe.arrayIndexScale(long[].class);
+
+    /** The value of {@code arrayIndexScale(float[].class)} */
+    public static final int ARRAY_FLOAT_INDEX_SCALE
+            = theUnsafe.arrayIndexScale(float[].class);
+
+    /** The value of {@code arrayIndexScale(double[].class)} */
+    public static final int ARRAY_DOUBLE_INDEX_SCALE
+            = theUnsafe.arrayIndexScale(double[].class);
+
+    /** The value of {@code arrayIndexScale(Object[].class)} */
+    public static final int ARRAY_OBJECT_INDEX_SCALE
+            = theUnsafe.arrayIndexScale(Object[].class);
+
+    /**
+     * Reports the size in bytes of a native pointer, as stored via {@link
+     * #putAddress}.  This value will be either 4 or 8.  Note that the sizes of
+     * other primitive types (as stored in native memory blocks) is determined
+     * fully by their information content.
+     */
+    public int addressSize() {
+        return ADDRESS_SIZE;
+    }
+
+    /** The value of {@code addressSize()} */
+    public static final int ADDRESS_SIZE = ADDRESS_SIZE0;
+
+    /**
+     * Reports the size in bytes of a native memory page (whatever that is).
+     * This value will always be a power of two.
+     */
+    public int pageSize() { return PAGE_SIZE; }
+
+    /**
+     * Reports the size in bytes of a data cache line written back by
+     * the hardware cache line flush operation available to the JVM or
+     * 0 if data cache line flushing is not enabled.
+     */
+    public int dataCacheLineFlushSize() { return DATA_CACHE_LINE_FLUSH_SIZE; }
+
+    /**
+     * Rounds down address to a data cache line boundary as
+     * determined by {@link #dataCacheLineFlushSize}
+     * @return the rounded down address
+     */
+    public long dataCacheLineAlignDown(long address) {
+        return (address & ~(DATA_CACHE_LINE_FLUSH_SIZE - 1));
+    }
+
+    /**
+     * Returns true if data cache line writeback
+     */
+    public static boolean isWritebackEnabled() { return DATA_CACHE_LINE_FLUSH_SIZE != 0; }
+
+    //--- random trusted operations from JNI:
+
+    /**
+     * Tells the VM to define a class, without security checks.  By default, the
+     * class loader and protection domain come from the caller's class.
+     */
+    public Class<?> defineClass(String name, byte[] b, int off, int len,
+                                ClassLoader loader,
+                                ProtectionDomain protectionDomain) {
+        if (b == null) {
+            throw new NullPointerException();
+        }
+        if (len < 0) {
+            throw new ArrayIndexOutOfBoundsException();
+        }
+
+        return defineClass0(name, b, off, len, loader, protectionDomain);
+    }
+
+    public native Class<?> defineClass0(String name, byte[] b, int off, int len,
+                                        ClassLoader loader,
+                                        ProtectionDomain protectionDomain);
+
+    /**
+     * Allocates an instance but does not run any constructor.
+     * Initializes the class if it has not yet been.
+     */
+    @IntrinsicCandidate
+    public native Object allocateInstance(Class<?> cls)
+        throws InstantiationException;
+
+    /**
+     * Allocates an array of a given type, but does not do zeroing.
+     * <p>
+     * This method should only be used in the very rare cases where a high-performance code
+     * overwrites the destination array completely, and compilers cannot assist in zeroing elimination.
+     * In an overwhelming majority of cases, a normal Java allocation should be used instead.
+     * <p>
+     * Users of this method are <b>required</b> to overwrite the initial (garbage) array contents
+     * before allowing untrusted code, or code in other threads, to observe the reference
+     * to the newly allocated array. In addition, the publication of the array reference must be
+     * safe according to the Java Memory Model requirements.
+     * <p>
+     * The safest approach to deal with an uninitialized array is to keep the reference to it in local
+     * variable at least until the initialization is complete, and then publish it <b>once</b>, either
+     * by writing it to a <em>volatile</em> field, or storing it into a <em>final</em> field in constructor,
+     * or issuing a {@link #storeFence} before publishing the reference.
+     * <p>
+     * @implnote This method can only allocate primitive arrays, to avoid garbage reference
+     * elements that could break heap integrity.
+     *
+     * @param componentType array component type to allocate
+     * @param length array size to allocate
+     * @throws IllegalArgumentException if component type is null, or not a primitive class;
+     *                                  or the length is negative
+     */
+    public Object allocateUninitializedArray(Class<?> componentType, int length) {
+       if (componentType == null) {
+           throw new IllegalArgumentException("Component type is null");
+       }
+       if (!componentType.isPrimitive()) {
+           throw new IllegalArgumentException("Component type is not primitive");
+       }
+       if (length < 0) {
+           throw new IllegalArgumentException("Negative length");
+       }
+       return allocateUninitializedArray0(componentType, length);
+    }
+
+    @IntrinsicCandidate
+    private Object allocateUninitializedArray0(Class<?> componentType, int length) {
+       // These fallbacks provide zeroed arrays, but intrinsic is not required to
+       // return the zeroed arrays.
+       if (componentType == byte.class)    return new byte[length];
+       if (componentType == boolean.class) return new boolean[length];
+       if (componentType == short.class)   return new short[length];
+       if (componentType == char.class)    return new char[length];
+       if (componentType == int.class)     return new int[length];
+       if (componentType == float.class)   return new float[length];
+       if (componentType == long.class)    return new long[length];
+       if (componentType == double.class)  return new double[length];
+       return null;
+    }
+
+    /** Throws the exception without telling the verifier. */
+    public native void throwException(Throwable ee);
+
+    /**
+     * Atomically updates Java variable to {@code x} if it is currently
+     * holding {@code expected}.
+     *
+     * <p>This operation has memory semantics of a {@code volatile} read
+     * and write.  Corresponds to C11 atomic_compare_exchange_strong.
+     *
+     * @return {@code true} if successful
+     */
+    @IntrinsicCandidate
+    public final native boolean compareAndSetReference(Object o, long offset,
+                                                       Object expected,
+                                                       Object x);
+
+    @IntrinsicCandidate
+    public final native Object compareAndExchangeReference(Object o, long offset,
+                                                           Object expected,
+                                                           Object x);
+
+    @IntrinsicCandidate
+    public final Object compareAndExchangeReferenceAcquire(Object o, long offset,
+                                                           Object expected,
+                                                           Object x) {
+        return compareAndExchangeReference(o, offset, expected, x);
+    }
+
+    @IntrinsicCandidate
+    public final Object compareAndExchangeReferenceRelease(Object o, long offset,
+                                                           Object expected,
+                                                           Object x) {
+        return compareAndExchangeReference(o, offset, expected, x);
+    }
+
+    @IntrinsicCandidate
+    public final boolean weakCompareAndSetReferencePlain(Object o, long offset,
+                                                         Object expected,
+                                                         Object x) {
+        return compareAndSetReference(o, offset, expected, x);
+    }
+
+    @IntrinsicCandidate
+    public final boolean weakCompareAndSetReferenceAcquire(Object o, long offset,
+                                                           Object expected,
+                                                           Object x) {
+        return compareAndSetReference(o, offset, expected, x);
+    }
+
+    @IntrinsicCandidate
+    public final boolean weakCompareAndSetReferenceRelease(Object o, long offset,
+                                                           Object expected,
+                                                           Object x) {
+        return compareAndSetReference(o, offset, expected, x);
+    }
+
+    @IntrinsicCandidate
+    public final boolean weakCompareAndSetReference(Object o, long offset,
+                                                    Object expected,
+                                                    Object x) {
+        return compareAndSetReference(o, offset, expected, x);
+    }
+
+    /**
+     * Atomically updates Java variable to {@code x} if it is currently
+     * holding {@code expected}.
+     *
+     * <p>This operation has memory semantics of a {@code volatile} read
+     * and write.  Corresponds to C11 atomic_compare_exchange_strong.
+     *
+     * @return {@code true} if successful
+     */
+    @IntrinsicCandidate
+    public final native boolean compareAndSetInt(Object o, long offset,
+                                                 int expected,
+                                                 int x);
+
+    @IntrinsicCandidate
+    public final native int compareAndExchangeInt(Object o, long offset,
+                                                  int expected,
+                                                  int x);
+
+    @IntrinsicCandidate
+    public final int compareAndExchangeIntAcquire(Object o, long offset,
+                                                         int expected,
+                                                         int x) {
+        return compareAndExchangeInt(o, offset, expected, x);
+    }
+
+    @IntrinsicCandidate
+    public final int compareAndExchangeIntRelease(Object o, long offset,
+                                                         int expected,
+                                                         int x) {
+        return compareAndExchangeInt(o, offset, expected, x);
+    }
+
+    @IntrinsicCandidate
+    public final boolean weakCompareAndSetIntPlain(Object o, long offset,
+                                                   int expected,
+                                                   int x) {
+        return compareAndSetInt(o, offset, expected, x);
+    }
+
+    @IntrinsicCandidate
+    public final boolean weakCompareAndSetIntAcquire(Object o, long offset,
+                                                     int expected,
+                                                     int x) {
+        return compareAndSetInt(o, offset, expected, x);
+    }
+
+    @IntrinsicCandidate
+    public final boolean weakCompareAndSetIntRelease(Object o, long offset,
+                                                     int expected,
+                                                     int x) {
+        return compareAndSetInt(o, offset, expected, x);
+    }
+
+    @IntrinsicCandidate
+    public final boolean weakCompareAndSetInt(Object o, long offset,
+                                              int expected,
+                                              int x) {
+        return compareAndSetInt(o, offset, expected, x);
+    }
+
+    @IntrinsicCandidate
+    public final byte compareAndExchangeByte(Object o, long offset,
+                                             byte expected,
+                                             byte x) {
+        long wordOffset = offset & ~3;
+        int shift = (int) (offset & 3) << 3;
+        if (BIG_ENDIAN) {
+            shift = 24 - shift;
+        }
+        int mask           = 0xFF << shift;
+        int maskedExpected = (expected & 0xFF) << shift;
+        int maskedX        = (x & 0xFF) << shift;
+        int fullWord;
+        do {
+            fullWord = getIntVolatile(o, wordOffset);
+            if ((fullWord & mask) != maskedExpected)
+                return (byte) ((fullWord & mask) >> shift);
+        } while (!weakCompareAndSetInt(o, wordOffset,
+                                                fullWord, (fullWord & ~mask) | maskedX));
+        return expected;
+    }
+
+    @IntrinsicCandidate
+    public final boolean compareAndSetByte(Object o, long offset,
+                                           byte expected,
+                                           byte x) {
+        return compareAndExchangeByte(o, offset, expected, x) == expected;
+    }
+
+    @IntrinsicCandidate
+    public final boolean weakCompareAndSetByte(Object o, long offset,
+                                               byte expected,
+                                               byte x) {
+        return compareAndSetByte(o, offset, expected, x);
+    }
+
+    @IntrinsicCandidate
+    public final boolean weakCompareAndSetByteAcquire(Object o, long offset,
+                                                      byte expected,
+                                                      byte x) {
+        return weakCompareAndSetByte(o, offset, expected, x);
+    }
+
+    @IntrinsicCandidate
+    public final boolean weakCompareAndSetByteRelease(Object o, long offset,
+                                                      byte expected,
+                                                      byte x) {
+        return weakCompareAndSetByte(o, offset, expected, x);
+    }
+
+    @IntrinsicCandidate
+    public final boolean weakCompareAndSetBytePlain(Object o, long offset,
+                                                    byte expected,
+                                                    byte x) {
+        return weakCompareAndSetByte(o, offset, expected, x);
+    }
+
+    @IntrinsicCandidate
+    public final byte compareAndExchangeByteAcquire(Object o, long offset,
+                                                    byte expected,
+                                                    byte x) {
+        return compareAndExchangeByte(o, offset, expected, x);
+    }
+
+    @IntrinsicCandidate
+    public final byte compareAndExchangeByteRelease(Object o, long offset,
+                                                    byte expected,
+                                                    byte x) {
+        return compareAndExchangeByte(o, offset, expected, x);
+    }
+
+    @IntrinsicCandidate
+    public final short compareAndExchangeShort(Object o, long offset,
+                                               short expected,
+                                               short x) {
+        if ((offset & 3) == 3) {
+            throw new IllegalArgumentException("Update spans the word, not supported");
+        }
+        long wordOffset = offset & ~3;
+        int shift = (int) (offset & 3) << 3;
+        if (BIG_ENDIAN) {
+            shift = 16 - shift;
+        }
+        int mask           = 0xFFFF << shift;
+        int maskedExpected = (expected & 0xFFFF) << shift;
+        int maskedX        = (x & 0xFFFF) << shift;
+        int fullWord;
+        do {
+            fullWord = getIntVolatile(o, wordOffset);
+            if ((fullWord & mask) != maskedExpected) {
+                return (short) ((fullWord & mask) >> shift);
+            }
+        } while (!weakCompareAndSetInt(o, wordOffset,
+                                                fullWord, (fullWord & ~mask) | maskedX));
+        return expected;
+    }
+
+    @IntrinsicCandidate
+    public final boolean compareAndSetShort(Object o, long offset,
+                                            short expected,
+                                            short x) {
+        return compareAndExchangeShort(o, offset, expected, x) == expected;
+    }
+
+    @IntrinsicCandidate
+    public final boolean weakCompareAndSetShort(Object o, long offset,
+                                                short expected,
+                                                short x) {
+        return compareAndSetShort(o, offset, expected, x);
+    }
+
+    @IntrinsicCandidate
+    public final boolean weakCompareAndSetShortAcquire(Object o, long offset,
+                                                       short expected,
+                                                       short x) {
+        return weakCompareAndSetShort(o, offset, expected, x);
+    }
+
+    @IntrinsicCandidate
+    public final boolean weakCompareAndSetShortRelease(Object o, long offset,
+                                                       short expected,
+                                                       short x) {
+        return weakCompareAndSetShort(o, offset, expected, x);
+    }
+
+    @IntrinsicCandidate
+    public final boolean weakCompareAndSetShortPlain(Object o, long offset,
+                                                     short expected,
+                                                     short x) {
+        return weakCompareAndSetShort(o, offset, expected, x);
+    }
+
+
+    @IntrinsicCandidate
+    public final short compareAndExchangeShortAcquire(Object o, long offset,
+                                                     short expected,
+                                                     short x) {
+        return compareAndExchangeShort(o, offset, expected, x);
+    }
+
+    @IntrinsicCandidate
+    public final short compareAndExchangeShortRelease(Object o, long offset,
+                                                    short expected,
+                                                    short x) {
+        return compareAndExchangeShort(o, offset, expected, x);
+    }
+
+    @ForceInline
+    private char s2c(short s) {
+        return (char) s;
+    }
+
+    @ForceInline
+    private short c2s(char s) {
+        return (short) s;
+    }
+
+    @ForceInline
+    public final boolean compareAndSetChar(Object o, long offset,
+                                           char expected,
+                                           char x) {
+        return compareAndSetShort(o, offset, c2s(expected), c2s(x));
+    }
+
+    @ForceInline
+    public final char compareAndExchangeChar(Object o, long offset,
+                                             char expected,
+                                             char x) {
+        return s2c(compareAndExchangeShort(o, offset, c2s(expected), c2s(x)));
+    }
+
+    @ForceInline
+    public final char compareAndExchangeCharAcquire(Object o, long offset,
+                                            char expected,
+                                            char x) {
+        return s2c(compareAndExchangeShortAcquire(o, offset, c2s(expected), c2s(x)));
+    }
+
+    @ForceInline
+    public final char compareAndExchangeCharRelease(Object o, long offset,
+                                            char expected,
+                                            char x) {
+        return s2c(compareAndExchangeShortRelease(o, offset, c2s(expected), c2s(x)));
+    }
+
+    @ForceInline
+    public final boolean weakCompareAndSetChar(Object o, long offset,
+                                               char expected,
+                                               char x) {
+        return weakCompareAndSetShort(o, offset, c2s(expected), c2s(x));
+    }
+
+    @ForceInline
+    public final boolean weakCompareAndSetCharAcquire(Object o, long offset,
+                                                      char expected,
+                                                      char x) {
+        return weakCompareAndSetShortAcquire(o, offset, c2s(expected), c2s(x));
+    }
+
+    @ForceInline
+    public final boolean weakCompareAndSetCharRelease(Object o, long offset,
+                                                      char expected,
+                                                      char x) {
+        return weakCompareAndSetShortRelease(o, offset, c2s(expected), c2s(x));
+    }
+
+    @ForceInline
+    public final boolean weakCompareAndSetCharPlain(Object o, long offset,
+                                                    char expected,
+                                                    char x) {
+        return weakCompareAndSetShortPlain(o, offset, c2s(expected), c2s(x));
+    }
+
+    /**
+     * The JVM converts integral values to boolean values using two
+     * different conventions, byte testing against zero and truncation
+     * to least-significant bit.
+     *
+     * <p>The JNI documents specify that, at least for returning
+     * values from native methods, a Java boolean value is converted
+     * to the value-set 0..1 by first truncating to a byte (0..255 or
+     * maybe -128..127) and then testing against zero. Thus, Java
+     * booleans in non-Java data structures are by convention
+     * represented as 8-bit containers containing either zero (for
+     * false) or any non-zero value (for true).
+     *
+     * <p>Java booleans in the heap are also stored in bytes, but are
+     * strongly normalized to the value-set 0..1 (i.e., they are
+     * truncated to the least-significant bit).
+     *
+     * <p>The main reason for having different conventions for
+     * conversion is performance: Truncation to the least-significant
+     * bit can be usually implemented with fewer (machine)
+     * instructions than byte testing against zero.
+     *
+     * <p>A number of Unsafe methods load boolean values from the heap
+     * as bytes. Unsafe converts those values according to the JNI
+     * rules (i.e, using the "testing against zero" convention). The
+     * method {@code byte2bool} implements that conversion.
+     *
+     * @param b the byte to be converted to boolean
+     * @return the result of the conversion
+     */
+    @ForceInline
+    private boolean byte2bool(byte b) {
+        return b != 0;
+    }
+
+    /**
+     * Convert a boolean value to a byte. The return value is strongly
+     * normalized to the value-set 0..1 (i.e., the value is truncated
+     * to the least-significant bit). See {@link #byte2bool(byte)} for
+     * more details on conversion conventions.
+     *
+     * @param b the boolean to be converted to byte (and then normalized)
+     * @return the result of the conversion
+     */
+    @ForceInline
+    private byte bool2byte(boolean b) {
+        return b ? (byte)1 : (byte)0;
+    }
+
+    @ForceInline
+    public final boolean compareAndSetBoolean(Object o, long offset,
+                                              boolean expected,
+                                              boolean x) {
+        return compareAndSetByte(o, offset, bool2byte(expected), bool2byte(x));
+    }
+
+    @ForceInline
+    public final boolean compareAndExchangeBoolean(Object o, long offset,
+                                                   boolean expected,
+                                                   boolean x) {
+        return byte2bool(compareAndExchangeByte(o, offset, bool2byte(expected), bool2byte(x)));
+    }
+
+    @ForceInline
+    public final boolean compareAndExchangeBooleanAcquire(Object o, long offset,
+                                                    boolean expected,
+                                                    boolean x) {
+        return byte2bool(compareAndExchangeByteAcquire(o, offset, bool2byte(expected), bool2byte(x)));
+    }
+
+    @ForceInline
+    public final boolean compareAndExchangeBooleanRelease(Object o, long offset,
+                                                       boolean expected,
+                                                       boolean x) {
+        return byte2bool(compareAndExchangeByteRelease(o, offset, bool2byte(expected), bool2byte(x)));
+    }
+
+    @ForceInline
+    public final boolean weakCompareAndSetBoolean(Object o, long offset,
+                                                  boolean expected,
+                                                  boolean x) {
+        return weakCompareAndSetByte(o, offset, bool2byte(expected), bool2byte(x));
+    }
+
+    @ForceInline
+    public final boolean weakCompareAndSetBooleanAcquire(Object o, long offset,
+                                                         boolean expected,
+                                                         boolean x) {
+        return weakCompareAndSetByteAcquire(o, offset, bool2byte(expected), bool2byte(x));
+    }
+
+    @ForceInline
+    public final boolean weakCompareAndSetBooleanRelease(Object o, long offset,
+                                                         boolean expected,
+                                                         boolean x) {
+        return weakCompareAndSetByteRelease(o, offset, bool2byte(expected), bool2byte(x));
+    }
+
+    @ForceInline
+    public final boolean weakCompareAndSetBooleanPlain(Object o, long offset,
+                                                       boolean expected,
+                                                       boolean x) {
+        return weakCompareAndSetBytePlain(o, offset, bool2byte(expected), bool2byte(x));
+    }
+
+    /**
+     * Atomically updates Java variable to {@code x} if it is currently
+     * holding {@code expected}.
+     *
+     * <p>This operation has memory semantics of a {@code volatile} read
+     * and write.  Corresponds to C11 atomic_compare_exchange_strong.
+     *
+     * @return {@code true} if successful
+     */
+    @ForceInline
+    public final boolean compareAndSetFloat(Object o, long offset,
+                                            float expected,
+                                            float x) {
+        return compareAndSetInt(o, offset,
+                                 Float.floatToRawIntBits(expected),
+                                 Float.floatToRawIntBits(x));
+    }
+
+    @ForceInline
+    public final float compareAndExchangeFloat(Object o, long offset,
+                                               float expected,
+                                               float x) {
+        int w = compareAndExchangeInt(o, offset,
+                                      Float.floatToRawIntBits(expected),
+                                      Float.floatToRawIntBits(x));
+        return Float.intBitsToFloat(w);
+    }
+
+    @ForceInline
+    public final float compareAndExchangeFloatAcquire(Object o, long offset,
+                                                  float expected,
+                                                  float x) {
+        int w = compareAndExchangeIntAcquire(o, offset,
+                                             Float.floatToRawIntBits(expected),
+                                             Float.floatToRawIntBits(x));
+        return Float.intBitsToFloat(w);
+    }
+
+    @ForceInline
+    public final float compareAndExchangeFloatRelease(Object o, long offset,
+                                                  float expected,
+                                                  float x) {
+        int w = compareAndExchangeIntRelease(o, offset,
+                                             Float.floatToRawIntBits(expected),
+                                             Float.floatToRawIntBits(x));
+        return Float.intBitsToFloat(w);
+    }
+
+    @ForceInline
+    public final boolean weakCompareAndSetFloatPlain(Object o, long offset,
+                                                     float expected,
+                                                     float x) {
+        return weakCompareAndSetIntPlain(o, offset,
+                                     Float.floatToRawIntBits(expected),
+                                     Float.floatToRawIntBits(x));
+    }
+
+    @ForceInline
+    public final boolean weakCompareAndSetFloatAcquire(Object o, long offset,
+                                                       float expected,
+                                                       float x) {
+        return weakCompareAndSetIntAcquire(o, offset,
+                                            Float.floatToRawIntBits(expected),
+                                            Float.floatToRawIntBits(x));
+    }
+
+    @ForceInline
+    public final boolean weakCompareAndSetFloatRelease(Object o, long offset,
+                                                       float expected,
+                                                       float x) {
+        return weakCompareAndSetIntRelease(o, offset,
+                                            Float.floatToRawIntBits(expected),
+                                            Float.floatToRawIntBits(x));
+    }
+
+    @ForceInline
+    public final boolean weakCompareAndSetFloat(Object o, long offset,
+                                                float expected,
+                                                float x) {
+        return weakCompareAndSetInt(o, offset,
+                                             Float.floatToRawIntBits(expected),
+                                             Float.floatToRawIntBits(x));
+    }
+
+    /**
+     * Atomically updates Java variable to {@code x} if it is currently
+     * holding {@code expected}.
+     *
+     * <p>This operation has memory semantics of a {@code volatile} read
+     * and write.  Corresponds to C11 atomic_compare_exchange_strong.
+     *
+     * @return {@code true} if successful
+     */
+    @ForceInline
+    public final boolean compareAndSetDouble(Object o, long offset,
+                                             double expected,
+                                             double x) {
+        return compareAndSetLong(o, offset,
+                                 Double.doubleToRawLongBits(expected),
+                                 Double.doubleToRawLongBits(x));
+    }
+
+    @ForceInline
+    public final double compareAndExchangeDouble(Object o, long offset,
+                                                 double expected,
+                                                 double x) {
+        long w = compareAndExchangeLong(o, offset,
+                                        Double.doubleToRawLongBits(expected),
+                                        Double.doubleToRawLongBits(x));
+        return Double.longBitsToDouble(w);
+    }
+
+    @ForceInline
+    public final double compareAndExchangeDoubleAcquire(Object o, long offset,
+                                                        double expected,
+                                                        double x) {
+        long w = compareAndExchangeLongAcquire(o, offset,
+                                               Double.doubleToRawLongBits(expected),
+                                               Double.doubleToRawLongBits(x));
+        return Double.longBitsToDouble(w);
+    }
+
+    @ForceInline
+    public final double compareAndExchangeDoubleRelease(Object o, long offset,
+                                                        double expected,
+                                                        double x) {
+        long w = compareAndExchangeLongRelease(o, offset,
+                                               Double.doubleToRawLongBits(expected),
+                                               Double.doubleToRawLongBits(x));
+        return Double.longBitsToDouble(w);
+    }
+
+    @ForceInline
+    public final boolean weakCompareAndSetDoublePlain(Object o, long offset,
+                                                      double expected,
+                                                      double x) {
+        return weakCompareAndSetLongPlain(o, offset,
+                                     Double.doubleToRawLongBits(expected),
+                                     Double.doubleToRawLongBits(x));
+    }
+
+    @ForceInline
+    public final boolean weakCompareAndSetDoubleAcquire(Object o, long offset,
+                                                        double expected,
+                                                        double x) {
+        return weakCompareAndSetLongAcquire(o, offset,
+                                             Double.doubleToRawLongBits(expected),
+                                             Double.doubleToRawLongBits(x));
+    }
+
+    @ForceInline
+    public final boolean weakCompareAndSetDoubleRelease(Object o, long offset,
+                                                        double expected,
+                                                        double x) {
+        return weakCompareAndSetLongRelease(o, offset,
+                                             Double.doubleToRawLongBits(expected),
+                                             Double.doubleToRawLongBits(x));
+    }
+
+    @ForceInline
+    public final boolean weakCompareAndSetDouble(Object o, long offset,
+                                                 double expected,
+                                                 double x) {
+        return weakCompareAndSetLong(o, offset,
+                                              Double.doubleToRawLongBits(expected),
+                                              Double.doubleToRawLongBits(x));
+    }
+
+    /**
+     * Atomically updates Java variable to {@code x} if it is currently
+     * holding {@code expected}.
+     *
+     * <p>This operation has memory semantics of a {@code volatile} read
+     * and write.  Corresponds to C11 atomic_compare_exchange_strong.
+     *
+     * @return {@code true} if successful
+     */
+    @IntrinsicCandidate
+    public final native boolean compareAndSetLong(Object o, long offset,
+                                                  long expected,
+                                                  long x);
+
+    @IntrinsicCandidate
+    public final native long compareAndExchangeLong(Object o, long offset,
+                                                    long expected,
+                                                    long x);
+
+    @IntrinsicCandidate
+    public final long compareAndExchangeLongAcquire(Object o, long offset,
+                                                           long expected,
+                                                           long x) {
+        return compareAndExchangeLong(o, offset, expected, x);
+    }
+
+    @IntrinsicCandidate
+    public final long compareAndExchangeLongRelease(Object o, long offset,
+                                                           long expected,
+                                                           long x) {
+        return compareAndExchangeLong(o, offset, expected, x);
+    }
+
+    @IntrinsicCandidate
+    public final boolean weakCompareAndSetLongPlain(Object o, long offset,
+                                                    long expected,
+                                                    long x) {
+        return compareAndSetLong(o, offset, expected, x);
+    }
+
+    @IntrinsicCandidate
+    public final boolean weakCompareAndSetLongAcquire(Object o, long offset,
+                                                      long expected,
+                                                      long x) {
+        return compareAndSetLong(o, offset, expected, x);
+    }
+
+    @IntrinsicCandidate
+    public final boolean weakCompareAndSetLongRelease(Object o, long offset,
+                                                      long expected,
+                                                      long x) {
+        return compareAndSetLong(o, offset, expected, x);
+    }
+
+    @IntrinsicCandidate
+    public final boolean weakCompareAndSetLong(Object o, long offset,
+                                               long expected,
+                                               long x) {
+        return compareAndSetLong(o, offset, expected, x);
+    }
+
+    /**
+     * Fetches a reference value from a given Java variable, with volatile
+     * load semantics. Otherwise identical to {@link #getReference(Object, long)}
+     */
+    @IntrinsicCandidate
+    public native Object getReferenceVolatile(Object o, long offset);
+
+    /**
+     * Stores a reference value into a given Java variable, with
+     * volatile store semantics. Otherwise identical to {@link #putReference(Object, long, Object)}
+     */
+    @IntrinsicCandidate
+    public native void putReferenceVolatile(Object o, long offset, Object x);
+
+    /** Volatile version of {@link #getInt(Object, long)}  */
+    @IntrinsicCandidate
+    public native int     getIntVolatile(Object o, long offset);
+
+    /** Volatile version of {@link #putInt(Object, long, int)}  */
+    @IntrinsicCandidate
+    public native void    putIntVolatile(Object o, long offset, int x);
+
+    /** Volatile version of {@link #getBoolean(Object, long)}  */
+    @IntrinsicCandidate
+    public native boolean getBooleanVolatile(Object o, long offset);
+
+    /** Volatile version of {@link #putBoolean(Object, long, boolean)}  */
+    @IntrinsicCandidate
+    public native void    putBooleanVolatile(Object o, long offset, boolean x);
+
+    /** Volatile version of {@link #getByte(Object, long)}  */
+    @IntrinsicCandidate
+    public native byte    getByteVolatile(Object o, long offset);
+
+    /** Volatile version of {@link #putByte(Object, long, byte)}  */
+    @IntrinsicCandidate
+    public native void    putByteVolatile(Object o, long offset, byte x);
+
+    /** Volatile version of {@link #getShort(Object, long)}  */
+    @IntrinsicCandidate
+    public native short   getShortVolatile(Object o, long offset);
+
+    /** Volatile version of {@link #putShort(Object, long, short)}  */
+    @IntrinsicCandidate
+    public native void    putShortVolatile(Object o, long offset, short x);
+
+    /** Volatile version of {@link #getChar(Object, long)}  */
+    @IntrinsicCandidate
+    public native char    getCharVolatile(Object o, long offset);
+
+    /** Volatile version of {@link #putChar(Object, long, char)}  */
+    @IntrinsicCandidate
+    public native void    putCharVolatile(Object o, long offset, char x);
+
+    /** Volatile version of {@link #getLong(Object, long)}  */
+    @IntrinsicCandidate
+    public native long    getLongVolatile(Object o, long offset);
+
+    /** Volatile version of {@link #putLong(Object, long, long)}  */
+    @IntrinsicCandidate
+    public native void    putLongVolatile(Object o, long offset, long x);
+
+    /** Volatile version of {@link #getFloat(Object, long)}  */
+    @IntrinsicCandidate
+    public native float   getFloatVolatile(Object o, long offset);
+
+    /** Volatile version of {@link #putFloat(Object, long, float)}  */
+    @IntrinsicCandidate
+    public native void    putFloatVolatile(Object o, long offset, float x);
+
+    /** Volatile version of {@link #getDouble(Object, long)}  */
+    @IntrinsicCandidate
+    public native double  getDoubleVolatile(Object o, long offset);
+
+    /** Volatile version of {@link #putDouble(Object, long, double)}  */
+    @IntrinsicCandidate
+    public native void    putDoubleVolatile(Object o, long offset, double x);
+
+
+
+    /** Acquire version of {@link #getReferenceVolatile(Object, long)} */
+    @IntrinsicCandidate
+    public final Object getReferenceAcquire(Object o, long offset) {
+        return getReferenceVolatile(o, offset);
+    }
+
+    /** Acquire version of {@link #getBooleanVolatile(Object, long)} */
+    @IntrinsicCandidate
+    public final boolean getBooleanAcquire(Object o, long offset) {
+        return getBooleanVolatile(o, offset);
+    }
+
+    /** Acquire version of {@link #getByteVolatile(Object, long)} */
+    @IntrinsicCandidate
+    public final byte getByteAcquire(Object o, long offset) {
+        return getByteVolatile(o, offset);
+    }
+
+    /** Acquire version of {@link #getShortVolatile(Object, long)} */
+    @IntrinsicCandidate
+    public final short getShortAcquire(Object o, long offset) {
+        return getShortVolatile(o, offset);
+    }
+
+    /** Acquire version of {@link #getCharVolatile(Object, long)} */
+    @IntrinsicCandidate
+    public final char getCharAcquire(Object o, long offset) {
+        return getCharVolatile(o, offset);
+    }
+
+    /** Acquire version of {@link #getIntVolatile(Object, long)} */
+    @IntrinsicCandidate
+    public final int getIntAcquire(Object o, long offset) {
+        return getIntVolatile(o, offset);
+    }
+
+    /** Acquire version of {@link #getFloatVolatile(Object, long)} */
+    @IntrinsicCandidate
+    public final float getFloatAcquire(Object o, long offset) {
+        return getFloatVolatile(o, offset);
+    }
+
+    /** Acquire version of {@link #getLongVolatile(Object, long)} */
+    @IntrinsicCandidate
+    public final long getLongAcquire(Object o, long offset) {
+        return getLongVolatile(o, offset);
+    }
+
+    /** Acquire version of {@link #getDoubleVolatile(Object, long)} */
+    @IntrinsicCandidate
+    public final double getDoubleAcquire(Object o, long offset) {
+        return getDoubleVolatile(o, offset);
+    }
+
+    /*
+     * Versions of {@link #putReferenceVolatile(Object, long, Object)}
+     * that do not guarantee immediate visibility of the store to
+     * other threads. This method is generally only useful if the
+     * underlying field is a Java volatile (or if an array cell, one
+     * that is otherwise only accessed using volatile accesses).
+     *
+     * Corresponds to C11 atomic_store_explicit(..., memory_order_release).
+     */
+
+    /** Release version of {@link #putReferenceVolatile(Object, long, Object)} */
+    @IntrinsicCandidate
+    public final void putReferenceRelease(Object o, long offset, Object x) {
+        putReferenceVolatile(o, offset, x);
+    }
+
+    /** Release version of {@link #putBooleanVolatile(Object, long, boolean)} */
+    @IntrinsicCandidate
+    public final void putBooleanRelease(Object o, long offset, boolean x) {
+        putBooleanVolatile(o, offset, x);
+    }
+
+    /** Release version of {@link #putByteVolatile(Object, long, byte)} */
+    @IntrinsicCandidate
+    public final void putByteRelease(Object o, long offset, byte x) {
+        putByteVolatile(o, offset, x);
+    }
+
+    /** Release version of {@link #putShortVolatile(Object, long, short)} */
+    @IntrinsicCandidate
+    public final void putShortRelease(Object o, long offset, short x) {
+        putShortVolatile(o, offset, x);
+    }
+
+    /** Release version of {@link #putCharVolatile(Object, long, char)} */
+    @IntrinsicCandidate
+    public final void putCharRelease(Object o, long offset, char x) {
+        putCharVolatile(o, offset, x);
+    }
+
+    /** Release version of {@link #putIntVolatile(Object, long, int)} */
+    @IntrinsicCandidate
+    public final void putIntRelease(Object o, long offset, int x) {
+        putIntVolatile(o, offset, x);
+    }
+
+    /** Release version of {@link #putFloatVolatile(Object, long, float)} */
+    @IntrinsicCandidate
+    public final void putFloatRelease(Object o, long offset, float x) {
+        putFloatVolatile(o, offset, x);
+    }
+
+    /** Release version of {@link #putLongVolatile(Object, long, long)} */
+    @IntrinsicCandidate
+    public final void putLongRelease(Object o, long offset, long x) {
+        putLongVolatile(o, offset, x);
+    }
+
+    /** Release version of {@link #putDoubleVolatile(Object, long, double)} */
+    @IntrinsicCandidate
+    public final void putDoubleRelease(Object o, long offset, double x) {
+        putDoubleVolatile(o, offset, x);
+    }
+
+    // ------------------------------ Opaque --------------------------------------
+
+    /** Opaque version of {@link #getReferenceVolatile(Object, long)} */
+    @IntrinsicCandidate
+    public final Object getReferenceOpaque(Object o, long offset) {
+        return getReferenceVolatile(o, offset);
+    }
+
+    /** Opaque version of {@link #getBooleanVolatile(Object, long)} */
+    @IntrinsicCandidate
+    public final boolean getBooleanOpaque(Object o, long offset) {
+        return getBooleanVolatile(o, offset);
+    }
+
+    /** Opaque version of {@link #getByteVolatile(Object, long)} */
+    @IntrinsicCandidate
+    public final byte getByteOpaque(Object o, long offset) {
+        return getByteVolatile(o, offset);
+    }
+
+    /** Opaque version of {@link #getShortVolatile(Object, long)} */
+    @IntrinsicCandidate
+    public final short getShortOpaque(Object o, long offset) {
+        return getShortVolatile(o, offset);
+    }
+
+    /** Opaque version of {@link #getCharVolatile(Object, long)} */
+    @IntrinsicCandidate
+    public final char getCharOpaque(Object o, long offset) {
+        return getCharVolatile(o, offset);
+    }
+
+    /** Opaque version of {@link #getIntVolatile(Object, long)} */
+    @IntrinsicCandidate
+    public final int getIntOpaque(Object o, long offset) {
+        return getIntVolatile(o, offset);
+    }
+
+    /** Opaque version of {@link #getFloatVolatile(Object, long)} */
+    @IntrinsicCandidate
+    public final float getFloatOpaque(Object o, long offset) {
+        return getFloatVolatile(o, offset);
+    }
+
+    /** Opaque version of {@link #getLongVolatile(Object, long)} */
+    @IntrinsicCandidate
+    public final long getLongOpaque(Object o, long offset) {
+        return getLongVolatile(o, offset);
+    }
+
+    /** Opaque version of {@link #getDoubleVolatile(Object, long)} */
+    @IntrinsicCandidate
+    public final double getDoubleOpaque(Object o, long offset) {
+        return getDoubleVolatile(o, offset);
+    }
+
+    /** Opaque version of {@link #putReferenceVolatile(Object, long, Object)} */
+    @IntrinsicCandidate
+    public final void putReferenceOpaque(Object o, long offset, Object x) {
+        putReferenceVolatile(o, offset, x);
+    }
+
+    /** Opaque version of {@link #putBooleanVolatile(Object, long, boolean)} */
+    @IntrinsicCandidate
+    public final void putBooleanOpaque(Object o, long offset, boolean x) {
+        putBooleanVolatile(o, offset, x);
+    }
+
+    /** Opaque version of {@link #putByteVolatile(Object, long, byte)} */
+    @IntrinsicCandidate
+    public final void putByteOpaque(Object o, long offset, byte x) {
+        putByteVolatile(o, offset, x);
+    }
+
+    /** Opaque version of {@link #putShortVolatile(Object, long, short)} */
+    @IntrinsicCandidate
+    public final void putShortOpaque(Object o, long offset, short x) {
+        putShortVolatile(o, offset, x);
+    }
+
+    /** Opaque version of {@link #putCharVolatile(Object, long, char)} */
+    @IntrinsicCandidate
+    public final void putCharOpaque(Object o, long offset, char x) {
+        putCharVolatile(o, offset, x);
+    }
+
+    /** Opaque version of {@link #putIntVolatile(Object, long, int)} */
+    @IntrinsicCandidate
+    public final void putIntOpaque(Object o, long offset, int x) {
+        putIntVolatile(o, offset, x);
+    }
+
+    /** Opaque version of {@link #putFloatVolatile(Object, long, float)} */
+    @IntrinsicCandidate
+    public final void putFloatOpaque(Object o, long offset, float x) {
+        putFloatVolatile(o, offset, x);
+    }
+
+    /** Opaque version of {@link #putLongVolatile(Object, long, long)} */
+    @IntrinsicCandidate
+    public final void putLongOpaque(Object o, long offset, long x) {
+        putLongVolatile(o, offset, x);
+    }
+
+    /** Opaque version of {@link #putDoubleVolatile(Object, long, double)} */
+    @IntrinsicCandidate
+    public final void putDoubleOpaque(Object o, long offset, double x) {
+        putDoubleVolatile(o, offset, x);
+    }
+
+    /**
+     * Unblocks the given thread blocked on {@code park}, or, if it is
+     * not blocked, causes the subsequent call to {@code park} not to
+     * block.  Note: this operation is "unsafe" solely because the
+     * caller must somehow ensure that the thread has not been
+     * destroyed. Nothing special is usually required to ensure this
+     * when called from Java (in which there will ordinarily be a live
+     * reference to the thread) but this is not nearly-automatically
+     * so when calling from native code.
+     *
+     * @param thread the thread to unpark.
+     */
+    @IntrinsicCandidate
+    public native void unpark(Object thread);
+
+    /**
+     * Blocks current thread, returning when a balancing
+     * {@code unpark} occurs, or a balancing {@code unpark} has
+     * already occurred, or the thread is interrupted, or, if not
+     * absolute and time is not zero, the given time nanoseconds have
+     * elapsed, or if absolute, the given deadline in milliseconds
+     * since Epoch has passed, or spuriously (i.e., returning for no
+     * "reason"). Note: This operation is in the Unsafe class only
+     * because {@code unpark} is, so it would be strange to place it
+     * elsewhere.
+     */
+    @IntrinsicCandidate
+    public native void park(boolean isAbsolute, long time);
+
+    /**
+     * Gets the load average in the system run queue assigned
+     * to the available processors averaged over various periods of time.
+     * This method retrieves the given {@code nelem} samples and
+     * assigns to the elements of the given {@code loadavg} array.
+     * The system imposes a maximum of 3 samples, representing
+     * averages over the last 1,  5,  and  15 minutes, respectively.
+     *
+     * @param loadavg an array of double of size nelems
+     * @param nelems the number of samples to be retrieved and
+     *        must be 1 to 3.
+     *
+     * @return the number of samples actually retrieved; or -1
+     *         if the load average is unobtainable.
+     */
+    public int getLoadAverage(double[] loadavg, int nelems) {
+        if (nelems < 0 || nelems > 3 || nelems > loadavg.length) {
+            throw new ArrayIndexOutOfBoundsException();
+        }
+
+        return getLoadAverage0(loadavg, nelems);
+    }
+
+    // The following contain CAS-based Java implementations used on
+    // platforms not supporting native instructions
+
+    /**
+     * Atomically adds the given value to the current value of a field
+     * or array element within the given object {@code o}
+     * at the given {@code offset}.
+     *
+     * @param o object/array to update the field/element in
+     * @param offset field/element offset
+     * @param delta the value to add
+     * @return the previous value
+     * @since 1.8
+     */
+    @IntrinsicCandidate
+    public final int getAndAddInt(Object o, long offset, int delta) {
+        int v;
+        do {
+            v = getIntVolatile(o, offset);
+        } while (!weakCompareAndSetInt(o, offset, v, v + delta));
+        return v;
+    }
+
+    @ForceInline
+    public final int getAndAddIntRelease(Object o, long offset, int delta) {
+        int v;
+        do {
+            v = getInt(o, offset);
+        } while (!weakCompareAndSetIntRelease(o, offset, v, v + delta));
+        return v;
+    }
+
+    @ForceInline
+    public final int getAndAddIntAcquire(Object o, long offset, int delta) {
+        int v;
+        do {
+            v = getIntAcquire(o, offset);
+        } while (!weakCompareAndSetIntAcquire(o, offset, v, v + delta));
+        return v;
+    }
+
+    /**
+     * Atomically adds the given value to the current value of a field
+     * or array element within the given object {@code o}
+     * at the given {@code offset}.
+     *
+     * @param o object/array to update the field/element in
+     * @param offset field/element offset
+     * @param delta the value to add
+     * @return the previous value
+     * @since 1.8
+     */
+    @IntrinsicCandidate
+    public final long getAndAddLong(Object o, long offset, long delta) {
+        long v;
+        do {
+            v = getLongVolatile(o, offset);
+        } while (!weakCompareAndSetLong(o, offset, v, v + delta));
+        return v;
+    }
+
+    @ForceInline
+    public final long getAndAddLongRelease(Object o, long offset, long delta) {
+        long v;
+        do {
+            v = getLong(o, offset);
+        } while (!weakCompareAndSetLongRelease(o, offset, v, v + delta));
+        return v;
+    }
+
+    @ForceInline
+    public final long getAndAddLongAcquire(Object o, long offset, long delta) {
+        long v;
+        do {
+            v = getLongAcquire(o, offset);
+        } while (!weakCompareAndSetLongAcquire(o, offset, v, v + delta));
+        return v;
+    }
+
+    @IntrinsicCandidate
+    public final byte getAndAddByte(Object o, long offset, byte delta) {
+        byte v;
+        do {
+            v = getByteVolatile(o, offset);
+        } while (!weakCompareAndSetByte(o, offset, v, (byte) (v + delta)));
+        return v;
+    }
+
+    @ForceInline
+    public final byte getAndAddByteRelease(Object o, long offset, byte delta) {
+        byte v;
+        do {
+            v = getByte(o, offset);
+        } while (!weakCompareAndSetByteRelease(o, offset, v, (byte) (v + delta)));
+        return v;
+    }
+
+    @ForceInline
+    public final byte getAndAddByteAcquire(Object o, long offset, byte delta) {
+        byte v;
+        do {
+            v = getByteAcquire(o, offset);
+        } while (!weakCompareAndSetByteAcquire(o, offset, v, (byte) (v + delta)));
+        return v;
+    }
+
+    @IntrinsicCandidate
+    public final short getAndAddShort(Object o, long offset, short delta) {
+        short v;
+        do {
+            v = getShortVolatile(o, offset);
+        } while (!weakCompareAndSetShort(o, offset, v, (short) (v + delta)));
+        return v;
+    }
+
+    @ForceInline
+    public final short getAndAddShortRelease(Object o, long offset, short delta) {
+        short v;
+        do {
+            v = getShort(o, offset);
+        } while (!weakCompareAndSetShortRelease(o, offset, v, (short) (v + delta)));
+        return v;
+    }
+
+    @ForceInline
+    public final short getAndAddShortAcquire(Object o, long offset, short delta) {
+        short v;
+        do {
+            v = getShortAcquire(o, offset);
+        } while (!weakCompareAndSetShortAcquire(o, offset, v, (short) (v + delta)));
+        return v;
+    }
+
+    @ForceInline
+    public final char getAndAddChar(Object o, long offset, char delta) {
+        return (char) getAndAddShort(o, offset, (short) delta);
+    }
+
+    @ForceInline
+    public final char getAndAddCharRelease(Object o, long offset, char delta) {
+        return (char) getAndAddShortRelease(o, offset, (short) delta);
+    }
+
+    @ForceInline
+    public final char getAndAddCharAcquire(Object o, long offset, char delta) {
+        return (char) getAndAddShortAcquire(o, offset, (short) delta);
+    }
+
+    @ForceInline
+    public final float getAndAddFloat(Object o, long offset, float delta) {
+        int expectedBits;
+        float v;
+        do {
+            // Load and CAS with the raw bits to avoid issues with NaNs and
+            // possible bit conversion from signaling NaNs to quiet NaNs that
+            // may result in the loop not terminating.
+            expectedBits = getIntVolatile(o, offset);
+            v = Float.intBitsToFloat(expectedBits);
+        } while (!weakCompareAndSetInt(o, offset,
+                                                expectedBits, Float.floatToRawIntBits(v + delta)));
+        return v;
+    }
+
+    @ForceInline
+    public final float getAndAddFloatRelease(Object o, long offset, float delta) {
+        int expectedBits;
+        float v;
+        do {
+            // Load and CAS with the raw bits to avoid issues with NaNs and
+            // possible bit conversion from signaling NaNs to quiet NaNs that
+            // may result in the loop not terminating.
+            expectedBits = getInt(o, offset);
+            v = Float.intBitsToFloat(expectedBits);
+        } while (!weakCompareAndSetIntRelease(o, offset,
+                                               expectedBits, Float.floatToRawIntBits(v + delta)));
+        return v;
+    }
+
+    @ForceInline
+    public final float getAndAddFloatAcquire(Object o, long offset, float delta) {
+        int expectedBits;
+        float v;
+        do {
+            // Load and CAS with the raw bits to avoid issues with NaNs and
+            // possible bit conversion from signaling NaNs to quiet NaNs that
+            // may result in the loop not terminating.
+            expectedBits = getIntAcquire(o, offset);
+            v = Float.intBitsToFloat(expectedBits);
+        } while (!weakCompareAndSetIntAcquire(o, offset,
+                                               expectedBits, Float.floatToRawIntBits(v + delta)));
+        return v;
+    }
+
+    @ForceInline
+    public final double getAndAddDouble(Object o, long offset, double delta) {
+        long expectedBits;
+        double v;
+        do {
+            // Load and CAS with the raw bits to avoid issues with NaNs and
+            // possible bit conversion from signaling NaNs to quiet NaNs that
+            // may result in the loop not terminating.
+            expectedBits = getLongVolatile(o, offset);
+            v = Double.longBitsToDouble(expectedBits);
+        } while (!weakCompareAndSetLong(o, offset,
+                                                 expectedBits, Double.doubleToRawLongBits(v + delta)));
+        return v;
+    }
+
+    @ForceInline
+    public final double getAndAddDoubleRelease(Object o, long offset, double delta) {
+        long expectedBits;
+        double v;
+        do {
+            // Load and CAS with the raw bits to avoid issues with NaNs and
+            // possible bit conversion from signaling NaNs to quiet NaNs that
+            // may result in the loop not terminating.
+            expectedBits = getLong(o, offset);
+            v = Double.longBitsToDouble(expectedBits);
+        } while (!weakCompareAndSetLongRelease(o, offset,
+                                                expectedBits, Double.doubleToRawLongBits(v + delta)));
+        return v;
+    }
+
+    @ForceInline
+    public final double getAndAddDoubleAcquire(Object o, long offset, double delta) {
+        long expectedBits;
+        double v;
+        do {
+            // Load and CAS with the raw bits to avoid issues with NaNs and
+            // possible bit conversion from signaling NaNs to quiet NaNs that
+            // may result in the loop not terminating.
+            expectedBits = getLongAcquire(o, offset);
+            v = Double.longBitsToDouble(expectedBits);
+        } while (!weakCompareAndSetLongAcquire(o, offset,
+                                                expectedBits, Double.doubleToRawLongBits(v + delta)));
+        return v;
+    }
+
+    /**
+     * Atomically exchanges the given value with the current value of
+     * a field or array element within the given object {@code o}
+     * at the given {@code offset}.
+     *
+     * @param o object/array to update the field/element in
+     * @param offset field/element offset
+     * @param newValue new value
+     * @return the previous value
+     * @since 1.8
+     */
+    @IntrinsicCandidate
+    public final int getAndSetInt(Object o, long offset, int newValue) {
+        int v;
+        do {
+            v = getIntVolatile(o, offset);
+        } while (!weakCompareAndSetInt(o, offset, v, newValue));
+        return v;
+    }
+
+    @ForceInline
+    public final int getAndSetIntRelease(Object o, long offset, int newValue) {
+        int v;
+        do {
+            v = getInt(o, offset);
+        } while (!weakCompareAndSetIntRelease(o, offset, v, newValue));
+        return v;
+    }
+
+    @ForceInline
+    public final int getAndSetIntAcquire(Object o, long offset, int newValue) {
+        int v;
+        do {
+            v = getIntAcquire(o, offset);
+        } while (!weakCompareAndSetIntAcquire(o, offset, v, newValue));
+        return v;
+    }
+
+    /**
+     * Atomically exchanges the given value with the current value of
+     * a field or array element within the given object {@code o}
+     * at the given {@code offset}.
+     *
+     * @param o object/array to update the field/element in
+     * @param offset field/element offset
+     * @param newValue new value
+     * @return the previous value
+     * @since 1.8
+     */
+    @IntrinsicCandidate
+    public final long getAndSetLong(Object o, long offset, long newValue) {
+        long v;
+        do {
+            v = getLongVolatile(o, offset);
+        } while (!weakCompareAndSetLong(o, offset, v, newValue));
+        return v;
+    }
+
+    @ForceInline
+    public final long getAndSetLongRelease(Object o, long offset, long newValue) {
+        long v;
+        do {
+            v = getLong(o, offset);
+        } while (!weakCompareAndSetLongRelease(o, offset, v, newValue));
+        return v;
+    }
+
+    @ForceInline
+    public final long getAndSetLongAcquire(Object o, long offset, long newValue) {
+        long v;
+        do {
+            v = getLongAcquire(o, offset);
+        } while (!weakCompareAndSetLongAcquire(o, offset, v, newValue));
+        return v;
+    }
+
+    /**
+     * Atomically exchanges the given reference value with the current
+     * reference value of a field or array element within the given
+     * object {@code o} at the given {@code offset}.
+     *
+     * @param o object/array to update the field/element in
+     * @param offset field/element offset
+     * @param newValue new value
+     * @return the previous value
+     * @since 1.8
+     */
+    @IntrinsicCandidate
+    public final Object getAndSetReference(Object o, long offset, Object newValue) {
+        Object v;
+        do {
+            v = getReferenceVolatile(o, offset);
+        } while (!weakCompareAndSetReference(o, offset, v, newValue));
+        return v;
+    }
+
+    @ForceInline
+    public final Object getAndSetReferenceRelease(Object o, long offset, Object newValue) {
+        Object v;
+        do {
+            v = getReference(o, offset);
+        } while (!weakCompareAndSetReferenceRelease(o, offset, v, newValue));
+        return v;
+    }
+
+    @ForceInline
+    public final Object getAndSetReferenceAcquire(Object o, long offset, Object newValue) {
+        Object v;
+        do {
+            v = getReferenceAcquire(o, offset);
+        } while (!weakCompareAndSetReferenceAcquire(o, offset, v, newValue));
+        return v;
+    }
+
+    @IntrinsicCandidate
+    public final byte getAndSetByte(Object o, long offset, byte newValue) {
+        byte v;
+        do {
+            v = getByteVolatile(o, offset);
+        } while (!weakCompareAndSetByte(o, offset, v, newValue));
+        return v;
+    }
+
+    @ForceInline
+    public final byte getAndSetByteRelease(Object o, long offset, byte newValue) {
+        byte v;
+        do {
+            v = getByte(o, offset);
+        } while (!weakCompareAndSetByteRelease(o, offset, v, newValue));
+        return v;
+    }
+
+    @ForceInline
+    public final byte getAndSetByteAcquire(Object o, long offset, byte newValue) {
+        byte v;
+        do {
+            v = getByteAcquire(o, offset);
+        } while (!weakCompareAndSetByteAcquire(o, offset, v, newValue));
+        return v;
+    }
+
+    @ForceInline
+    public final boolean getAndSetBoolean(Object o, long offset, boolean newValue) {
+        return byte2bool(getAndSetByte(o, offset, bool2byte(newValue)));
+    }
+
+    @ForceInline
+    public final boolean getAndSetBooleanRelease(Object o, long offset, boolean newValue) {
+        return byte2bool(getAndSetByteRelease(o, offset, bool2byte(newValue)));
+    }
+
+    @ForceInline
+    public final boolean getAndSetBooleanAcquire(Object o, long offset, boolean newValue) {
+        return byte2bool(getAndSetByteAcquire(o, offset, bool2byte(newValue)));
+    }
+
+    @IntrinsicCandidate
+    public final short getAndSetShort(Object o, long offset, short newValue) {
+        short v;
+        do {
+            v = getShortVolatile(o, offset);
+        } while (!weakCompareAndSetShort(o, offset, v, newValue));
+        return v;
+    }
+
+    @ForceInline
+    public final short getAndSetShortRelease(Object o, long offset, short newValue) {
+        short v;
+        do {
+            v = getShort(o, offset);
+        } while (!weakCompareAndSetShortRelease(o, offset, v, newValue));
+        return v;
+    }
+
+    @ForceInline
+    public final short getAndSetShortAcquire(Object o, long offset, short newValue) {
+        short v;
+        do {
+            v = getShortAcquire(o, offset);
+        } while (!weakCompareAndSetShortAcquire(o, offset, v, newValue));
+        return v;
+    }
+
+    @ForceInline
+    public final char getAndSetChar(Object o, long offset, char newValue) {
+        return s2c(getAndSetShort(o, offset, c2s(newValue)));
+    }
+
+    @ForceInline
+    public final char getAndSetCharRelease(Object o, long offset, char newValue) {
+        return s2c(getAndSetShortRelease(o, offset, c2s(newValue)));
+    }
+
+    @ForceInline
+    public final char getAndSetCharAcquire(Object o, long offset, char newValue) {
+        return s2c(getAndSetShortAcquire(o, offset, c2s(newValue)));
+    }
+
+    @ForceInline
+    public final float getAndSetFloat(Object o, long offset, float newValue) {
+        int v = getAndSetInt(o, offset, Float.floatToRawIntBits(newValue));
+        return Float.intBitsToFloat(v);
+    }
+
+    @ForceInline
+    public final float getAndSetFloatRelease(Object o, long offset, float newValue) {
+        int v = getAndSetIntRelease(o, offset, Float.floatToRawIntBits(newValue));
+        return Float.intBitsToFloat(v);
+    }
+
+    @ForceInline
+    public final float getAndSetFloatAcquire(Object o, long offset, float newValue) {
+        int v = getAndSetIntAcquire(o, offset, Float.floatToRawIntBits(newValue));
+        return Float.intBitsToFloat(v);
+    }
+
+    @ForceInline
+    public final double getAndSetDouble(Object o, long offset, double newValue) {
+        long v = getAndSetLong(o, offset, Double.doubleToRawLongBits(newValue));
+        return Double.longBitsToDouble(v);
+    }
+
+    @ForceInline
+    public final double getAndSetDoubleRelease(Object o, long offset, double newValue) {
+        long v = getAndSetLongRelease(o, offset, Double.doubleToRawLongBits(newValue));
+        return Double.longBitsToDouble(v);
+    }
+
+    @ForceInline
+    public final double getAndSetDoubleAcquire(Object o, long offset, double newValue) {
+        long v = getAndSetLongAcquire(o, offset, Double.doubleToRawLongBits(newValue));
+        return Double.longBitsToDouble(v);
+    }
+
+
+    // The following contain CAS-based Java implementations used on
+    // platforms not supporting native instructions
+
+    @ForceInline
+    public final boolean getAndBitwiseOrBoolean(Object o, long offset, boolean mask) {
+        return byte2bool(getAndBitwiseOrByte(o, offset, bool2byte(mask)));
+    }
+
+    @ForceInline
+    public final boolean getAndBitwiseOrBooleanRelease(Object o, long offset, boolean mask) {
+        return byte2bool(getAndBitwiseOrByteRelease(o, offset, bool2byte(mask)));
+    }
+
+    @ForceInline
+    public final boolean getAndBitwiseOrBooleanAcquire(Object o, long offset, boolean mask) {
+        return byte2bool(getAndBitwiseOrByteAcquire(o, offset, bool2byte(mask)));
+    }
+
+    @ForceInline
+    public final boolean getAndBitwiseAndBoolean(Object o, long offset, boolean mask) {
+        return byte2bool(getAndBitwiseAndByte(o, offset, bool2byte(mask)));
+    }
+
+    @ForceInline
+    public final boolean getAndBitwiseAndBooleanRelease(Object o, long offset, boolean mask) {
+        return byte2bool(getAndBitwiseAndByteRelease(o, offset, bool2byte(mask)));
+    }
+
+    @ForceInline
+    public final boolean getAndBitwiseAndBooleanAcquire(Object o, long offset, boolean mask) {
+        return byte2bool(getAndBitwiseAndByteAcquire(o, offset, bool2byte(mask)));
+    }
+
+    @ForceInline
+    public final boolean getAndBitwiseXorBoolean(Object o, long offset, boolean mask) {
+        return byte2bool(getAndBitwiseXorByte(o, offset, bool2byte(mask)));
+    }
+
+    @ForceInline
+    public final boolean getAndBitwiseXorBooleanRelease(Object o, long offset, boolean mask) {
+        return byte2bool(getAndBitwiseXorByteRelease(o, offset, bool2byte(mask)));
+    }
+
+    @ForceInline
+    public final boolean getAndBitwiseXorBooleanAcquire(Object o, long offset, boolean mask) {
+        return byte2bool(getAndBitwiseXorByteAcquire(o, offset, bool2byte(mask)));
+    }
+
+
+    @ForceInline
+    public final byte getAndBitwiseOrByte(Object o, long offset, byte mask) {
+        byte current;
+        do {
+            current = getByteVolatile(o, offset);
+        } while (!weakCompareAndSetByte(o, offset,
+                                                  current, (byte) (current | mask)));
+        return current;
+    }
+
+    @ForceInline
+    public final byte getAndBitwiseOrByteRelease(Object o, long offset, byte mask) {
+        byte current;
+        do {
+            current = getByte(o, offset);
+        } while (!weakCompareAndSetByteRelease(o, offset,
+                                                 current, (byte) (current | mask)));
+        return current;
+    }
+
+    @ForceInline
+    public final byte getAndBitwiseOrByteAcquire(Object o, long offset, byte mask) {
+        byte current;
+        do {
+            // Plain read, the value is a hint, the acquire CAS does the work
+            current = getByte(o, offset);
+        } while (!weakCompareAndSetByteAcquire(o, offset,
+                                                 current, (byte) (current | mask)));
+        return current;
+    }
+
+    @ForceInline
+    public final byte getAndBitwiseAndByte(Object o, long offset, byte mask) {
+        byte current;
+        do {
+            current = getByteVolatile(o, offset);
+        } while (!weakCompareAndSetByte(o, offset,
+                                                  current, (byte) (current & mask)));
+        return current;
+    }
+
+    @ForceInline
+    public final byte getAndBitwiseAndByteRelease(Object o, long offset, byte mask) {
+        byte current;
+        do {
+            current = getByte(o, offset);
+        } while (!weakCompareAndSetByteRelease(o, offset,
+                                                 current, (byte) (current & mask)));
+        return current;
+    }
+
+    @ForceInline
+    public final byte getAndBitwiseAndByteAcquire(Object o, long offset, byte mask) {
+        byte current;
+        do {
+            // Plain read, the value is a hint, the acquire CAS does the work
+            current = getByte(o, offset);
+        } while (!weakCompareAndSetByteAcquire(o, offset,
+                                                 current, (byte) (current & mask)));
+        return current;
+    }
+
+    @ForceInline
+    public final byte getAndBitwiseXorByte(Object o, long offset, byte mask) {
+        byte current;
+        do {
+            current = getByteVolatile(o, offset);
+        } while (!weakCompareAndSetByte(o, offset,
+                                                  current, (byte) (current ^ mask)));
+        return current;
+    }
+
+    @ForceInline
+    public final byte getAndBitwiseXorByteRelease(Object o, long offset, byte mask) {
+        byte current;
+        do {
+            current = getByte(o, offset);
+        } while (!weakCompareAndSetByteRelease(o, offset,
+                                                 current, (byte) (current ^ mask)));
+        return current;
+    }
+
+    @ForceInline
+    public final byte getAndBitwiseXorByteAcquire(Object o, long offset, byte mask) {
+        byte current;
+        do {
+            // Plain read, the value is a hint, the acquire CAS does the work
+            current = getByte(o, offset);
+        } while (!weakCompareAndSetByteAcquire(o, offset,
+                                                 current, (byte) (current ^ mask)));
+        return current;
+    }
+
+
+    @ForceInline
+    public final char getAndBitwiseOrChar(Object o, long offset, char mask) {
+        return s2c(getAndBitwiseOrShort(o, offset, c2s(mask)));
+    }
+
+    @ForceInline
+    public final char getAndBitwiseOrCharRelease(Object o, long offset, char mask) {
+        return s2c(getAndBitwiseOrShortRelease(o, offset, c2s(mask)));
+    }
+
+    @ForceInline
+    public final char getAndBitwiseOrCharAcquire(Object o, long offset, char mask) {
+        return s2c(getAndBitwiseOrShortAcquire(o, offset, c2s(mask)));
+    }
+
+    @ForceInline
+    public final char getAndBitwiseAndChar(Object o, long offset, char mask) {
+        return s2c(getAndBitwiseAndShort(o, offset, c2s(mask)));
+    }
+
+    @ForceInline
+    public final char getAndBitwiseAndCharRelease(Object o, long offset, char mask) {
+        return s2c(getAndBitwiseAndShortRelease(o, offset, c2s(mask)));
+    }
+
+    @ForceInline
+    public final char getAndBitwiseAndCharAcquire(Object o, long offset, char mask) {
+        return s2c(getAndBitwiseAndShortAcquire(o, offset, c2s(mask)));
+    }
+
+    @ForceInline
+    public final char getAndBitwiseXorChar(Object o, long offset, char mask) {
+        return s2c(getAndBitwiseXorShort(o, offset, c2s(mask)));
+    }
+
+    @ForceInline
+    public final char getAndBitwiseXorCharRelease(Object o, long offset, char mask) {
+        return s2c(getAndBitwiseXorShortRelease(o, offset, c2s(mask)));
+    }
+
+    @ForceInline
+    public final char getAndBitwiseXorCharAcquire(Object o, long offset, char mask) {
+        return s2c(getAndBitwiseXorShortAcquire(o, offset, c2s(mask)));
+    }
+
+
+    @ForceInline
+    public final short getAndBitwiseOrShort(Object o, long offset, short mask) {
+        short current;
+        do {
+            current = getShortVolatile(o, offset);
+        } while (!weakCompareAndSetShort(o, offset,
+                                                current, (short) (current | mask)));
+        return current;
+    }
+
+    @ForceInline
+    public final short getAndBitwiseOrShortRelease(Object o, long offset, short mask) {
+        short current;
+        do {
+            current = getShort(o, offset);
+        } while (!weakCompareAndSetShortRelease(o, offset,
+                                               current, (short) (current | mask)));
+        return current;
+    }
+
+    @ForceInline
+    public final short getAndBitwiseOrShortAcquire(Object o, long offset, short mask) {
+        short current;
+        do {
+            // Plain read, the value is a hint, the acquire CAS does the work
+            current = getShort(o, offset);
+        } while (!weakCompareAndSetShortAcquire(o, offset,
+                                               current, (short) (current | mask)));
+        return current;
+    }
+
+    @ForceInline
+    public final short getAndBitwiseAndShort(Object o, long offset, short mask) {
+        short current;
+        do {
+            current = getShortVolatile(o, offset);
+        } while (!weakCompareAndSetShort(o, offset,
+                                                current, (short) (current & mask)));
+        return current;
+    }
+
+    @ForceInline
+    public final short getAndBitwiseAndShortRelease(Object o, long offset, short mask) {
+        short current;
+        do {
+            current = getShort(o, offset);
+        } while (!weakCompareAndSetShortRelease(o, offset,
+                                               current, (short) (current & mask)));
+        return current;
+    }
+
+    @ForceInline
+    public final short getAndBitwiseAndShortAcquire(Object o, long offset, short mask) {
+        short current;
+        do {
+            // Plain read, the value is a hint, the acquire CAS does the work
+            current = getShort(o, offset);
+        } while (!weakCompareAndSetShortAcquire(o, offset,
+                                               current, (short) (current & mask)));
+        return current;
+    }
+
+    @ForceInline
+    public final short getAndBitwiseXorShort(Object o, long offset, short mask) {
+        short current;
+        do {
+            current = getShortVolatile(o, offset);
+        } while (!weakCompareAndSetShort(o, offset,
+                                                current, (short) (current ^ mask)));
+        return current;
+    }
+
+    @ForceInline
+    public final short getAndBitwiseXorShortRelease(Object o, long offset, short mask) {
+        short current;
+        do {
+            current = getShort(o, offset);
+        } while (!weakCompareAndSetShortRelease(o, offset,
+                                               current, (short) (current ^ mask)));
+        return current;
+    }
+
+    @ForceInline
+    public final short getAndBitwiseXorShortAcquire(Object o, long offset, short mask) {
+        short current;
+        do {
+            // Plain read, the value is a hint, the acquire CAS does the work
+            current = getShort(o, offset);
+        } while (!weakCompareAndSetShortAcquire(o, offset,
+                                               current, (short) (current ^ mask)));
+        return current;
+    }
+
+
+    @ForceInline
+    public final int getAndBitwiseOrInt(Object o, long offset, int mask) {
+        int current;
+        do {
+            current = getIntVolatile(o, offset);
+        } while (!weakCompareAndSetInt(o, offset,
+                                                current, current | mask));
+        return current;
+    }
+
+    @ForceInline
+    public final int getAndBitwiseOrIntRelease(Object o, long offset, int mask) {
+        int current;
+        do {
+            current = getInt(o, offset);
+        } while (!weakCompareAndSetIntRelease(o, offset,
+                                               current, current | mask));
+        return current;
+    }
+
+    @ForceInline
+    public final int getAndBitwiseOrIntAcquire(Object o, long offset, int mask) {
+        int current;
+        do {
+            // Plain read, the value is a hint, the acquire CAS does the work
+            current = getInt(o, offset);
+        } while (!weakCompareAndSetIntAcquire(o, offset,
+                                               current, current | mask));
+        return current;
+    }
+
+    /**
+     * Atomically replaces the current value of a field or array element within
+     * the given object with the result of bitwise AND between the current value
+     * and mask.
+     *
+     * @param o object/array to update the field/element in
+     * @param offset field/element offset
+     * @param mask the mask value
+     * @return the previous value
+     * @since 9
+     */
+    @ForceInline
+    public final int getAndBitwiseAndInt(Object o, long offset, int mask) {
+        int current;
+        do {
+            current = getIntVolatile(o, offset);
+        } while (!weakCompareAndSetInt(o, offset,
+                                                current, current & mask));
+        return current;
+    }
+
+    @ForceInline
+    public final int getAndBitwiseAndIntRelease(Object o, long offset, int mask) {
+        int current;
+        do {
+            current = getInt(o, offset);
+        } while (!weakCompareAndSetIntRelease(o, offset,
+                                               current, current & mask));
+        return current;
+    }
+
+    @ForceInline
+    public final int getAndBitwiseAndIntAcquire(Object o, long offset, int mask) {
+        int current;
+        do {
+            // Plain read, the value is a hint, the acquire CAS does the work
+            current = getInt(o, offset);
+        } while (!weakCompareAndSetIntAcquire(o, offset,
+                                               current, current & mask));
+        return current;
+    }
+
+    @ForceInline
+    public final int getAndBitwiseXorInt(Object o, long offset, int mask) {
+        int current;
+        do {
+            current = getIntVolatile(o, offset);
+        } while (!weakCompareAndSetInt(o, offset,
+                                                current, current ^ mask));
+        return current;
+    }
+
+    @ForceInline
+    public final int getAndBitwiseXorIntRelease(Object o, long offset, int mask) {
+        int current;
+        do {
+            current = getInt(o, offset);
+        } while (!weakCompareAndSetIntRelease(o, offset,
+                                               current, current ^ mask));
+        return current;
+    }
+
+    @ForceInline
+    public final int getAndBitwiseXorIntAcquire(Object o, long offset, int mask) {
+        int current;
+        do {
+            // Plain read, the value is a hint, the acquire CAS does the work
+            current = getInt(o, offset);
+        } while (!weakCompareAndSetIntAcquire(o, offset,
+                                               current, current ^ mask));
+        return current;
+    }
+
+
+    @ForceInline
+    public final long getAndBitwiseOrLong(Object o, long offset, long mask) {
+        long current;
+        do {
+            current = getLongVolatile(o, offset);
+        } while (!weakCompareAndSetLong(o, offset,
+                                                current, current | mask));
+        return current;
+    }
+
+    @ForceInline
+    public final long getAndBitwiseOrLongRelease(Object o, long offset, long mask) {
+        long current;
+        do {
+            current = getLong(o, offset);
+        } while (!weakCompareAndSetLongRelease(o, offset,
+                                               current, current | mask));
+        return current;
+    }
+
+    @ForceInline
+    public final long getAndBitwiseOrLongAcquire(Object o, long offset, long mask) {
+        long current;
+        do {
+            // Plain read, the value is a hint, the acquire CAS does the work
+            current = getLong(o, offset);
+        } while (!weakCompareAndSetLongAcquire(o, offset,
+                                               current, current | mask));
+        return current;
+    }
+
+    @ForceInline
+    public final long getAndBitwiseAndLong(Object o, long offset, long mask) {
+        long current;
+        do {
+            current = getLongVolatile(o, offset);
+        } while (!weakCompareAndSetLong(o, offset,
+                                                current, current & mask));
+        return current;
+    }
+
+    @ForceInline
+    public final long getAndBitwiseAndLongRelease(Object o, long offset, long mask) {
+        long current;
+        do {
+            current = getLong(o, offset);
+        } while (!weakCompareAndSetLongRelease(o, offset,
+                                               current, current & mask));
+        return current;
+    }
+
+    @ForceInline
+    public final long getAndBitwiseAndLongAcquire(Object o, long offset, long mask) {
+        long current;
+        do {
+            // Plain read, the value is a hint, the acquire CAS does the work
+            current = getLong(o, offset);
+        } while (!weakCompareAndSetLongAcquire(o, offset,
+                                               current, current & mask));
+        return current;
+    }
+
+    @ForceInline
+    public final long getAndBitwiseXorLong(Object o, long offset, long mask) {
+        long current;
+        do {
+            current = getLongVolatile(o, offset);
+        } while (!weakCompareAndSetLong(o, offset,
+                                                current, current ^ mask));
+        return current;
+    }
+
+    @ForceInline
+    public final long getAndBitwiseXorLongRelease(Object o, long offset, long mask) {
+        long current;
+        do {
+            current = getLong(o, offset);
+        } while (!weakCompareAndSetLongRelease(o, offset,
+                                               current, current ^ mask));
+        return current;
+    }
+
+    @ForceInline
+    public final long getAndBitwiseXorLongAcquire(Object o, long offset, long mask) {
+        long current;
+        do {
+            // Plain read, the value is a hint, the acquire CAS does the work
+            current = getLong(o, offset);
+        } while (!weakCompareAndSetLongAcquire(o, offset,
+                                               current, current ^ mask));
+        return current;
+    }
+
+
+
+    /**
+     * Ensures that loads before the fence will not be reordered with loads and
+     * stores after the fence; a "LoadLoad plus LoadStore barrier".
+     *
+     * Corresponds to C11 atomic_thread_fence(memory_order_acquire)
+     * (an "acquire fence").
+     *
+     * Provides a LoadLoad barrier followed by a LoadStore barrier.
+     *
+     * @since 1.8
+     */
+    @IntrinsicCandidate
+    public final void loadFence() {
+        // If loadFence intrinsic is not available, fall back to full fence.
+        fullFence();
+    }
+
+    /**
+     * Ensures that loads and stores before the fence will not be reordered with
+     * stores after the fence; a "StoreStore plus LoadStore barrier".
+     *
+     * Corresponds to C11 atomic_thread_fence(memory_order_release)
+     * (a "release fence").
+     *
+     * Provides a StoreStore barrier followed by a LoadStore barrier.
+     *
+     * @since 1.8
+     */
+    @IntrinsicCandidate
+    public final void storeFence() {
+        // If storeFence intrinsic is not available, fall back to full fence.
+        fullFence();
+    }
+
+    /**
+     * Ensures that loads and stores before the fence will not be reordered
+     * with loads and stores after the fence.  Implies the effects of both
+     * loadFence() and storeFence(), and in addition, the effect of a StoreLoad
+     * barrier.
+     *
+     * Corresponds to C11 atomic_thread_fence(memory_order_seq_cst).
+     * @since 1.8
+     */
+    @IntrinsicCandidate
+    public native void fullFence();
+
+    /**
+     * Ensures that loads before the fence will not be reordered with
+     * loads after the fence.
+     *
+     * @implNote
+     * This method is operationally equivalent to {@link #loadFence()}.
+     *
+     * @since 9
+     */
+    public final void loadLoadFence() {
+        loadFence();
+    }
+
+    /**
+     * Ensures that stores before the fence will not be reordered with
+     * stores after the fence.
+     *
+     * @since 9
+     */
+    @IntrinsicCandidate
+    public final void storeStoreFence() {
+        // If storeStoreFence intrinsic is not available, fall back to storeFence.
+        storeFence();
+    }
+
+    /**
+     * Throws IllegalAccessError; for use by the VM for access control
+     * error support.
+     * @since 1.8
+     */
+    private static void throwIllegalAccessError() {
+        throw new IllegalAccessError();
+    }
+
+    /**
+     * Throws NoSuchMethodError; for use by the VM for redefinition support.
+     * @since 13
+     */
+    private static void throwNoSuchMethodError() {
+        throw new NoSuchMethodError();
+    }
+
+    /**
+     * @return Returns true if the native byte ordering of this
+     * platform is big-endian, false if it is little-endian.
+     */
+    public final boolean isBigEndian() { return BIG_ENDIAN; }
+
+    /**
+     * @return Returns true if this platform is capable of performing
+     * accesses at addresses which are not aligned for the type of the
+     * primitive type being accessed, false otherwise.
+     */
+    public final boolean unalignedAccess() { return UNALIGNED_ACCESS; }
+
+    /**
+     * Fetches a value at some byte offset into a given Java object.
+     * More specifically, fetches a value within the given object
+     * <code>o</code> at the given offset, or (if <code>o</code> is
+     * null) from the memory address whose numerical value is the
+     * given offset.  <p>
+     *
+     * The specification of this method is the same as {@link
+     * #getLong(Object, long)} except that the offset does not need to
+     * have been obtained from {@link #objectFieldOffset} on the
+     * {@link java.lang.reflect.Field} of some Java field.  The value
+     * in memory is raw data, and need not correspond to any Java
+     * variable.  Unless <code>o</code> is null, the value accessed
+     * must be entirely within the allocated object.  The endianness
+     * of the value in memory is the endianness of the native platform.
+     *
+     * <p> The read will be atomic with respect to the largest power
+     * of two that divides the GCD of the offset and the storage size.
+     * For example, getLongUnaligned will make atomic reads of 2-, 4-,
+     * or 8-byte storage units if the offset is zero mod 2, 4, or 8,
+     * respectively.  There are no other guarantees of atomicity.
+     * <p>
+     * 8-byte atomicity is only guaranteed on platforms on which
+     * support atomic accesses to longs.
+     *
+     * @param o Java heap object in which the value resides, if any, else
+     *        null
+     * @param offset The offset in bytes from the start of the object
+     * @return the value fetched from the indicated object
+     * @throws RuntimeException No defined exceptions are thrown, not even
+     *         {@link NullPointerException}
+     * @since 9
+     */
+    @IntrinsicCandidate
+    public final long getLongUnaligned(Object o, long offset) {
+        if ((offset & 7) == 0) {
+            return getLong(o, offset);
+        } else if ((offset & 3) == 0) {
+            return makeLong(getInt(o, offset),
+                            getInt(o, offset + 4));
+        } else if ((offset & 1) == 0) {
+            return makeLong(getShort(o, offset),
+                            getShort(o, offset + 2),
+                            getShort(o, offset + 4),
+                            getShort(o, offset + 6));
+        } else {
+            return makeLong(getByte(o, offset),
+                            getByte(o, offset + 1),
+                            getByte(o, offset + 2),
+                            getByte(o, offset + 3),
+                            getByte(o, offset + 4),
+                            getByte(o, offset + 5),
+                            getByte(o, offset + 6),
+                            getByte(o, offset + 7));
+        }
+    }
+    /**
+     * As {@link #getLongUnaligned(Object, long)} but with an
+     * additional argument which specifies the endianness of the value
+     * as stored in memory.
+     *
+     * @param o Java heap object in which the variable resides
+     * @param offset The offset in bytes from the start of the object
+     * @param bigEndian The endianness of the value
+     * @return the value fetched from the indicated object
+     * @since 9
+     */
+    public final long getLongUnaligned(Object o, long offset, boolean bigEndian) {
+        return convEndian(bigEndian, getLongUnaligned(o, offset));
+    }
+
+    /** @see #getLongUnaligned(Object, long) */
+    @IntrinsicCandidate
+    public final int getIntUnaligned(Object o, long offset) {
+        if ((offset & 3) == 0) {
+            return getInt(o, offset);
+        } else if ((offset & 1) == 0) {
+            return makeInt(getShort(o, offset),
+                           getShort(o, offset + 2));
+        } else {
+            return makeInt(getByte(o, offset),
+                           getByte(o, offset + 1),
+                           getByte(o, offset + 2),
+                           getByte(o, offset + 3));
+        }
+    }
+    /** @see #getLongUnaligned(Object, long, boolean) */
+    public final int getIntUnaligned(Object o, long offset, boolean bigEndian) {
+        return convEndian(bigEndian, getIntUnaligned(o, offset));
+    }
+
+    /** @see #getLongUnaligned(Object, long) */
+    @IntrinsicCandidate
+    public final short getShortUnaligned(Object o, long offset) {
+        if ((offset & 1) == 0) {
+            return getShort(o, offset);
+        } else {
+            return makeShort(getByte(o, offset),
+                             getByte(o, offset + 1));
+        }
+    }
+    /** @see #getLongUnaligned(Object, long, boolean) */
+    public final short getShortUnaligned(Object o, long offset, boolean bigEndian) {
+        return convEndian(bigEndian, getShortUnaligned(o, offset));
+    }
+
+    /** @see #getLongUnaligned(Object, long) */
+    @IntrinsicCandidate
+    public final char getCharUnaligned(Object o, long offset) {
+        if ((offset & 1) == 0) {
+            return getChar(o, offset);
+        } else {
+            return (char)makeShort(getByte(o, offset),
+                                   getByte(o, offset + 1));
+        }
+    }
+
+    /** @see #getLongUnaligned(Object, long, boolean) */
+    public final char getCharUnaligned(Object o, long offset, boolean bigEndian) {
+        return convEndian(bigEndian, getCharUnaligned(o, offset));
+    }
+
+    /**
+     * Stores a value at some byte offset into a given Java object.
+     * <p>
+     * The specification of this method is the same as {@link
+     * #getLong(Object, long)} except that the offset does not need to
+     * have been obtained from {@link #objectFieldOffset} on the
+     * {@link java.lang.reflect.Field} of some Java field.  The value
+     * in memory is raw data, and need not correspond to any Java
+     * variable.  The endianness of the value in memory is the
+     * endianness of the native platform.
+     * <p>
+     * The write will be atomic with respect to the largest power of
+     * two that divides the GCD of the offset and the storage size.
+     * For example, putLongUnaligned will make atomic writes of 2-, 4-,
+     * or 8-byte storage units if the offset is zero mod 2, 4, or 8,
+     * respectively.  There are no other guarantees of atomicity.
+     * <p>
+     * 8-byte atomicity is only guaranteed on platforms on which
+     * support atomic accesses to longs.
+     *
+     * @param o Java heap object in which the value resides, if any, else
+     *        null
+     * @param offset The offset in bytes from the start of the object
+     * @param x the value to store
+     * @throws RuntimeException No defined exceptions are thrown, not even
+     *         {@link NullPointerException}
+     * @since 9
+     */
+    @IntrinsicCandidate
+    public final void putLongUnaligned(Object o, long offset, long x) {
+        if ((offset & 7) == 0) {
+            putLong(o, offset, x);
+        } else if ((offset & 3) == 0) {
+            putLongParts(o, offset,
+                         (int)(x >> 0),
+                         (int)(x >>> 32));
+        } else if ((offset & 1) == 0) {
+            putLongParts(o, offset,
+                         (short)(x >>> 0),
+                         (short)(x >>> 16),
+                         (short)(x >>> 32),
+                         (short)(x >>> 48));
+        } else {
+            putLongParts(o, offset,
+                         (byte)(x >>> 0),
+                         (byte)(x >>> 8),
+                         (byte)(x >>> 16),
+                         (byte)(x >>> 24),
+                         (byte)(x >>> 32),
+                         (byte)(x >>> 40),
+                         (byte)(x >>> 48),
+                         (byte)(x >>> 56));
+        }
+    }
+
+    /**
+     * As {@link #putLongUnaligned(Object, long, long)} but with an additional
+     * argument which specifies the endianness of the value as stored in memory.
+     * @param o Java heap object in which the value resides
+     * @param offset The offset in bytes from the start of the object
+     * @param x the value to store
+     * @param bigEndian The endianness of the value
+     * @throws RuntimeException No defined exceptions are thrown, not even
+     *         {@link NullPointerException}
+     * @since 9
+     */
+    public final void putLongUnaligned(Object o, long offset, long x, boolean bigEndian) {
+        putLongUnaligned(o, offset, convEndian(bigEndian, x));
+    }
+
+    /** @see #putLongUnaligned(Object, long, long) */
+    @IntrinsicCandidate
+    public final void putIntUnaligned(Object o, long offset, int x) {
+        if ((offset & 3) == 0) {
+            putInt(o, offset, x);
+        } else if ((offset & 1) == 0) {
+            putIntParts(o, offset,
+                        (short)(x >> 0),
+                        (short)(x >>> 16));
+        } else {
+            putIntParts(o, offset,
+                        (byte)(x >>> 0),
+                        (byte)(x >>> 8),
+                        (byte)(x >>> 16),
+                        (byte)(x >>> 24));
+        }
+    }
+    /** @see #putLongUnaligned(Object, long, long, boolean) */
+    public final void putIntUnaligned(Object o, long offset, int x, boolean bigEndian) {
+        putIntUnaligned(o, offset, convEndian(bigEndian, x));
+    }
+
+    /** @see #putLongUnaligned(Object, long, long) */
+    @IntrinsicCandidate
+    public final void putShortUnaligned(Object o, long offset, short x) {
+        if ((offset & 1) == 0) {
+            putShort(o, offset, x);
+        } else {
+            putShortParts(o, offset,
+                          (byte)(x >>> 0),
+                          (byte)(x >>> 8));
+        }
+    }
+    /** @see #putLongUnaligned(Object, long, long, boolean) */
+    public final void putShortUnaligned(Object o, long offset, short x, boolean bigEndian) {
+        putShortUnaligned(o, offset, convEndian(bigEndian, x));
+    }
+
+    /** @see #putLongUnaligned(Object, long, long) */
+    @IntrinsicCandidate
+    public final void putCharUnaligned(Object o, long offset, char x) {
+        putShortUnaligned(o, offset, (short)x);
+    }
+    /** @see #putLongUnaligned(Object, long, long, boolean) */
+    public final void putCharUnaligned(Object o, long offset, char x, boolean bigEndian) {
+        putCharUnaligned(o, offset, convEndian(bigEndian, x));
+    }
+
+    private static int pickPos(int top, int pos) { return BIG_ENDIAN ? top - pos : pos; }
+
+    // These methods construct integers from bytes.  The byte ordering
+    // is the native endianness of this platform.
+    private static long makeLong(byte i0, byte i1, byte i2, byte i3, byte i4, byte i5, byte i6, byte i7) {
+        return ((toUnsignedLong(i0) << pickPos(56, 0))
+              | (toUnsignedLong(i1) << pickPos(56, 8))
+              | (toUnsignedLong(i2) << pickPos(56, 16))
+              | (toUnsignedLong(i3) << pickPos(56, 24))
+              | (toUnsignedLong(i4) << pickPos(56, 32))
+              | (toUnsignedLong(i5) << pickPos(56, 40))
+              | (toUnsignedLong(i6) << pickPos(56, 48))
+              | (toUnsignedLong(i7) << pickPos(56, 56)));
+    }
+    private static long makeLong(short i0, short i1, short i2, short i3) {
+        return ((toUnsignedLong(i0) << pickPos(48, 0))
+              | (toUnsignedLong(i1) << pickPos(48, 16))
+              | (toUnsignedLong(i2) << pickPos(48, 32))
+              | (toUnsignedLong(i3) << pickPos(48, 48)));
+    }
+    private static long makeLong(int i0, int i1) {
+        return (toUnsignedLong(i0) << pickPos(32, 0))
+             | (toUnsignedLong(i1) << pickPos(32, 32));
+    }
+    private static int makeInt(short i0, short i1) {
+        return (toUnsignedInt(i0) << pickPos(16, 0))
+             | (toUnsignedInt(i1) << pickPos(16, 16));
+    }
+    private static int makeInt(byte i0, byte i1, byte i2, byte i3) {
+        return ((toUnsignedInt(i0) << pickPos(24, 0))
+              | (toUnsignedInt(i1) << pickPos(24, 8))
+              | (toUnsignedInt(i2) << pickPos(24, 16))
+              | (toUnsignedInt(i3) << pickPos(24, 24)));
+    }
+    private static short makeShort(byte i0, byte i1) {
+        return (short)((toUnsignedInt(i0) << pickPos(8, 0))
+                     | (toUnsignedInt(i1) << pickPos(8, 8)));
+    }
+
+    private static byte  pick(byte  le, byte  be) { return BIG_ENDIAN ? be : le; }
+    private static short pick(short le, short be) { return BIG_ENDIAN ? be : le; }
+    private static int   pick(int   le, int   be) { return BIG_ENDIAN ? be : le; }
+
+    // These methods write integers to memory from smaller parts
+    // provided by their caller.  The ordering in which these parts
+    // are written is the native endianness of this platform.
+    private void putLongParts(Object o, long offset, byte i0, byte i1, byte i2, byte i3, byte i4, byte i5, byte i6, byte i7) {
+        putByte(o, offset + 0, pick(i0, i7));
+        putByte(o, offset + 1, pick(i1, i6));
+        putByte(o, offset + 2, pick(i2, i5));
+        putByte(o, offset + 3, pick(i3, i4));
+        putByte(o, offset + 4, pick(i4, i3));
+        putByte(o, offset + 5, pick(i5, i2));
+        putByte(o, offset + 6, pick(i6, i1));
+        putByte(o, offset + 7, pick(i7, i0));
+    }
+    private void putLongParts(Object o, long offset, short i0, short i1, short i2, short i3) {
+        putShort(o, offset + 0, pick(i0, i3));
+        putShort(o, offset + 2, pick(i1, i2));
+        putShort(o, offset + 4, pick(i2, i1));
+        putShort(o, offset + 6, pick(i3, i0));
+    }
+    private void putLongParts(Object o, long offset, int i0, int i1) {
+        putInt(o, offset + 0, pick(i0, i1));
+        putInt(o, offset + 4, pick(i1, i0));
+    }
+    private void putIntParts(Object o, long offset, short i0, short i1) {
+        putShort(o, offset + 0, pick(i0, i1));
+        putShort(o, offset + 2, pick(i1, i0));
+    }
+    private void putIntParts(Object o, long offset, byte i0, byte i1, byte i2, byte i3) {
+        putByte(o, offset + 0, pick(i0, i3));
+        putByte(o, offset + 1, pick(i1, i2));
+        putByte(o, offset + 2, pick(i2, i1));
+        putByte(o, offset + 3, pick(i3, i0));
+    }
+    private void putShortParts(Object o, long offset, byte i0, byte i1) {
+        putByte(o, offset + 0, pick(i0, i1));
+        putByte(o, offset + 1, pick(i1, i0));
+    }
+
+    // Zero-extend an integer
+    private static int toUnsignedInt(byte n)    { return n & 0xff; }
+    private static int toUnsignedInt(short n)   { return n & 0xffff; }
+    private static long toUnsignedLong(byte n)  { return n & 0xffl; }
+    private static long toUnsignedLong(short n) { return n & 0xffffl; }
+    private static long toUnsignedLong(int n)   { return n & 0xffffffffl; }
+
+    // Maybe byte-reverse an integer
+    private static char convEndian(boolean big, char n)   { return big == BIG_ENDIAN ? n : Character.reverseBytes(n); }
+    private static short convEndian(boolean big, short n) { return big == BIG_ENDIAN ? n : Short.reverseBytes(n)    ; }
+    private static int convEndian(boolean big, int n)     { return big == BIG_ENDIAN ? n : Integer.reverseBytes(n)  ; }
+    private static long convEndian(boolean big, long n)   { return big == BIG_ENDIAN ? n : Long.reverseBytes(n)     ; }
+
+
+
+    private native long allocateMemory0(long bytes);
+    private native long reallocateMemory0(long address, long bytes);
+    private native void freeMemory0(long address);
+    @IntrinsicCandidate
+    private native void setMemory0(Object o, long offset, long bytes, byte value);
+    @IntrinsicCandidate
+    private native void copyMemory0(Object srcBase, long srcOffset, Object destBase, long destOffset, long bytes);
+    private native void copySwapMemory0(Object srcBase, long srcOffset, Object destBase, long destOffset, long bytes, long elemSize);
+    private native long objectFieldOffset0(Field f);
+    private native long objectFieldOffset1(Class<?> c, String name);
+    private native long staticFieldOffset0(Field f);
+    private native Object staticFieldBase0(Field f);
+    private native boolean shouldBeInitialized0(Class<?> c);
+    private native void ensureClassInitialized0(Class<?> c);
+    private native int arrayBaseOffset0(Class<?> arrayClass);
+    private native int arrayIndexScale0(Class<?> arrayClass);
+    private native int getLoadAverage0(double[] loadavg, int nelems);
+
+
+    /**
+     * Invokes the given direct byte buffer's cleaner, if any.
+     *
+     * @param directBuffer a direct byte buffer
+     * @throws NullPointerException     if {@code directBuffer} is null
+     * @throws IllegalArgumentException if {@code directBuffer} is non-direct,
+     *                                  or is a {@link java.nio.Buffer#slice slice}, or is a
+     *                                  {@link java.nio.Buffer#duplicate duplicate}
+     */
+    public void invokeCleaner(java.nio.ByteBuffer directBuffer) {
+        if (!directBuffer.isDirect())
+            throw new IllegalArgumentException("buffer is non-direct");
+
+        DirectBuffer db = (DirectBuffer) directBuffer;
+        if (db.attachment() != null)
+            throw new IllegalArgumentException("duplicate or slice");
+
+        Cleaner cleaner = db.cleaner();
+        if (cleaner != null) {
+            cleaner.clean();
+        }
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/misc/UnsafeConstants.class b/tests/test_data/std/jdk/internal/misc/UnsafeConstants.class
new file mode 100644
index 0000000000000000000000000000000000000000..198baf810c6cc5cccfee82188bc7c9a8ffd9bc33
GIT binary patch
literal 583
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oIf^NY5=Dh#L5eX*u_bB%Vq`F;_Inb1Knahi;E8T*5SK#z3l%zR)Bpeg

literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/misc/UnsafeConstants.java b/tests/test_data/std/jdk/internal/misc/UnsafeConstants.java
new file mode 100644
index 00000000..65ee7b3a
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/misc/UnsafeConstants.java
@@ -0,0 +1,122 @@
+/*
+ * Copyright (c) 2019, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2019, Red Hat Inc. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package jdk.internal.misc;
+
+/**
+ * A class used to expose details of the underlying hardware that
+ * configure the operation of class Unsafe.  This class is
+ * package-private as the only intended client is class Unsafe.
+ * All fields in this class must be static final constants.
+ *
+ * @since 13
+ *
+ * @implNote
+ *
+ * The JVM injects hardware-specific values into all the static fields
+ * of this class during JVM initialization. The static initialization
+ * block is executed when the class is initialized then JVM injection
+ * updates the fields with the correct constants. The static block
+ * is required to prevent the fields from being considered constant
+ * variables, so the field values will be not be compiled directly into
+ * any class that uses them.
+ */
+
+final class UnsafeConstants {
+
+    /**
+     * This constructor is private because the class is not meant to
+     * be instantiated.
+     */
+    private UnsafeConstants() {}
+
+    /**
+     * The size in bytes of a native pointer, as stored via {@link
+     * #putAddress}.  This value will be either 4 or 8.  Note that the
+     * sizes of other primitive types (as stored in native memory
+     * blocks) is determined fully by their information content.
+     *
+     * @implNote
+     * The actual value for this field is injected by the JVM.
+     */
+
+    static final int ADDRESS_SIZE0;
+
+    /**
+     * The size in bytes of a native memory page (whatever that is).
+     * This value will always be a power of two.
+     *
+     * @implNote
+     * The actual value for this field is injected by the JVM.
+     */
+
+    static final int PAGE_SIZE;
+
+    /**
+     * Flag whose value is true if and only if the native endianness
+     * of this platform is big.
+     *
+     * @implNote
+     * The actual value for this field is injected by the JVM.
+     */
+
+    static final boolean BIG_ENDIAN;
+
+    /**
+     * Flag whose value is true if and only if the platform can
+     * perform unaligned accesses
+     *
+     * @implNote
+     * The actual value for this field is injected by the JVM.
+     */
+
+    static final boolean UNALIGNED_ACCESS;
+
+    /**
+     * The size of an L1 data cache line which will be either a power
+     * of two or zero.
+     *
+     * <p>A non-zero value indicates that writeback to memory is
+     * enabled for the current processor. The value defines the
+     * natural alignment and size of any data cache line committed to
+     * memory by a single writeback operation. If data cache line
+     * writeback is not enabled for the current hardware the field
+     * will have value 0.
+     *
+     * @implNote
+     * The actual value for this field is injected by the JVM.
+     */
+
+    static final int DATA_CACHE_LINE_FLUSH_SIZE;
+
+    static {
+        ADDRESS_SIZE0 = 0;
+        PAGE_SIZE = 0;
+        BIG_ENDIAN = false;
+        UNALIGNED_ACCESS = false;
+        DATA_CACHE_LINE_FLUSH_SIZE = 0;
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/misc/VM$BufferPool.class b/tests/test_data/std/jdk/internal/misc/VM$BufferPool.class
new file mode 100644
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diff --git a/tests/test_data/std/jdk/internal/misc/VM$BufferPoolsHolder.class b/tests/test_data/std/jdk/internal/misc/VM$BufferPoolsHolder.class
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diff --git a/tests/test_data/std/jdk/internal/misc/VM.java b/tests/test_data/std/jdk/internal/misc/VM.java
new file mode 100644
index 00000000..de6f011f
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/misc/VM.java
@@ -0,0 +1,507 @@
+/*
+ * Copyright (c) 1996, 2024, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package jdk.internal.misc;
+
+import static java.lang.Thread.State.*;
+
+import java.io.PrintStream;
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.List;
+import java.util.Map;
+
+import jdk.internal.access.SharedSecrets;
+import jdk.internal.vm.annotation.Stable;
+import sun.nio.ch.FileChannelImpl;
+
+public class VM {
+
+    // the init level when the VM is fully initialized
+    private static final int JAVA_LANG_SYSTEM_INITED     = 1;
+    private static final int MODULE_SYSTEM_INITED        = 2;
+    private static final int SYSTEM_LOADER_INITIALIZING  = 3;
+    private static final int SYSTEM_BOOTED               = 4;
+    private static final int SYSTEM_SHUTDOWN             = 5;
+
+    // 0, 1, 2, ...
+    private static volatile int initLevel;
+    private static final Object lock = new Object();
+
+    /**
+     * Sets the init level.
+     *
+     * @see java.lang.System#initPhase1
+     * @see java.lang.System#initPhase2
+     * @see java.lang.System#initPhase3
+     */
+    public static void initLevel(int value) {
+        synchronized (lock) {
+            if (value <= initLevel || value > SYSTEM_SHUTDOWN)
+                throw new InternalError("Bad level: " + value);
+            initLevel = value;
+            lock.notifyAll();
+        }
+    }
+
+    /**
+     * Returns the current init level.
+     */
+    public static int initLevel() {
+        return initLevel;
+    }
+
+    /**
+     * Waits for the init level to get the given value.
+     */
+    public static void awaitInitLevel(int value) throws InterruptedException {
+        synchronized (lock) {
+            while (initLevel < value) {
+                lock.wait();
+            }
+        }
+    }
+
+    /**
+     * Returns {@code true} if the module system has been initialized.
+     * @see java.lang.System#initPhase2
+     */
+    public static boolean isModuleSystemInited() {
+        return initLevel >= MODULE_SYSTEM_INITED;
+    }
+
+    private static @Stable boolean javaLangInvokeInited;
+    public static void setJavaLangInvokeInited() {
+        if (javaLangInvokeInited) {
+            throw new InternalError("java.lang.invoke already inited");
+        }
+        javaLangInvokeInited = true;
+    }
+
+    public static boolean isJavaLangInvokeInited() {
+        return javaLangInvokeInited;
+    }
+
+    /**
+     * Returns {@code true} if the VM is fully initialized.
+     */
+    public static boolean isBooted() {
+        return initLevel >= SYSTEM_BOOTED;
+    }
+
+    /**
+     * Set shutdown state.  Shutdown completes when all registered shutdown
+     * hooks have been run.
+     *
+     * @see java.lang.Shutdown
+     */
+    public static void shutdown() {
+        initLevel(SYSTEM_SHUTDOWN);
+    }
+
+    /**
+     * Returns {@code true} if the VM has been shutdown
+     */
+    public static boolean isShutdown() {
+        return initLevel == SYSTEM_SHUTDOWN;
+    }
+
+    // A user-settable upper limit on the maximum amount of allocatable direct
+    // buffer memory.  This value may be changed during VM initialization if
+    // "java" is launched with "-XX:MaxDirectMemorySize=<size>".
+    //
+    // The initial value of this field is arbitrary; during JRE initialization
+    // it will be reset to the value specified on the command line, if any,
+    // otherwise to Runtime.getRuntime().maxMemory().
+    //
+    private static long directMemory = 64 * 1024 * 1024;
+
+    // Returns the maximum amount of allocatable direct buffer memory.
+    // The directMemory variable is initialized during system initialization
+    // in the saveAndRemoveProperties method.
+    //
+    public static long maxDirectMemory() {
+        return directMemory;
+    }
+
+    // User-controllable flag that determines if direct buffers should be page
+    // aligned. The "-XX:+PageAlignDirectMemory" option can be used to force
+    // buffers, allocated by ByteBuffer.allocateDirect, to be page aligned.
+    @Stable
+    private static boolean pageAlignDirectMemory;
+
+    // Returns {@code true} if the direct buffers should be page aligned. This
+    // variable is initialized by saveAndRemoveProperties.
+    public static boolean isDirectMemoryPageAligned() {
+        return pageAlignDirectMemory;
+    }
+
+    private static int classFileMajorVersion;
+    private static int classFileMinorVersion;
+    private static final int PREVIEW_MINOR_VERSION = 65535;
+
+    /**
+     * Tests if the given version is a supported {@code class}
+     * file version.
+     *
+     * A {@code class} file depends on the preview features of Java SE {@code N}
+     * if the major version is {@code N} and the minor version is 65535.
+     * This method returns {@code true} if the given version is a supported
+     * {@code class} file version regardless of whether the preview features
+     * are enabled or not.
+     *
+     * @jvms 4.1 Table 4.1-A. class file format major versions
+     */
+    public static boolean isSupportedClassFileVersion(int major, int minor) {
+        if (major < 45 || major > classFileMajorVersion) return false;
+        // for major version is between 45 and 55 inclusive, the minor version may be any value
+        if (major < 56) return true;
+        // otherwise, the minor version must be 0 or 65535
+        return minor == 0 || minor == PREVIEW_MINOR_VERSION;
+    }
+
+    /**
+     * Tests if the given version is a supported {@code class}
+     * file version for module descriptor.
+     *
+     * major.minor version >= 53.0
+     */
+    public static boolean isSupportedModuleDescriptorVersion(int major, int minor) {
+        if (major < 53 || major > classFileMajorVersion) return false;
+        // for major version is between 45 and 55 inclusive, the minor version may be any value
+        if (major < 56) return true;
+        // otherwise, the minor version must be 0 or 65535
+        // preview features do not apply to module-info.class but JVMS allows it
+        return minor == 0 || minor == PREVIEW_MINOR_VERSION;
+    }
+
+    /**
+     * Returns true if the given class loader is the bootstrap class loader
+     * or the platform class loader.
+     */
+    public static boolean isSystemDomainLoader(ClassLoader loader) {
+        return loader == null || loader == ClassLoader.getPlatformClassLoader();
+    }
+
+    /**
+     * Returns the system property of the specified key saved at
+     * system initialization time.  This method should only be used
+     * for the system properties that are not changed during runtime.
+     *
+     * Note that the saved system properties do not include
+     * the ones set by java.lang.VersionProps.init().
+     */
+    public static String getSavedProperty(String key) {
+        if (savedProps == null)
+            throw new IllegalStateException("Not yet initialized");
+
+        return savedProps.get(key);
+    }
+
+    /**
+     * Gets an unmodifiable view of the system properties saved at system
+     * initialization time. This method should only be used
+     * for the system properties that are not changed during runtime.
+     *
+     * Note that the saved system properties do not include
+     * the ones set by java.lang.VersionProps.init().
+     */
+    public static Map<String, String> getSavedProperties() {
+        if (savedProps == null)
+            throw new IllegalStateException("Not yet initialized");
+
+        return Collections.unmodifiableMap(savedProps);
+    }
+
+    private static Map<String, String> savedProps;
+
+    // Save a private copy of the system properties and remove
+    // the system properties that are not intended for public access.
+    //
+    // This method can only be invoked during system initialization.
+    public static void saveProperties(Map<String, String> props) {
+        if (initLevel() != 0)
+            throw new IllegalStateException("Wrong init level");
+
+        // only main thread is running at this time, so savedProps and
+        // its content will be correctly published to threads started later
+        if (savedProps == null) {
+            savedProps = props;
+        }
+
+        // Set the maximum amount of direct memory.  This value is controlled
+        // by the vm option -XX:MaxDirectMemorySize=<size>.
+        // The maximum amount of allocatable direct buffer memory (in bytes)
+        // from the system property sun.nio.MaxDirectMemorySize set by the VM.
+        // If not set or set to -1, the max memory will be used
+        // The system property will be removed.
+        String s = props.get("sun.nio.MaxDirectMemorySize");
+        if (s == null || s.isEmpty() || s.equals("-1")) {
+            // -XX:MaxDirectMemorySize not given, take default
+            directMemory = Runtime.getRuntime().maxMemory();
+        } else {
+            long l = Long.parseLong(s);
+            if (l > -1)
+                directMemory = l;
+        }
+
+        // Check if direct buffers should be page aligned
+        s = props.get("sun.nio.PageAlignDirectMemory");
+        if ("true".equals(s))
+            pageAlignDirectMemory = true;
+
+        s = props.get("java.class.version");
+        int index = s.indexOf('.');
+        try {
+            classFileMajorVersion = Integer.parseInt(s.substring(0, index));
+            classFileMinorVersion = Integer.parseInt(s.substring(index + 1));
+        } catch (NumberFormatException e) {
+            throw new InternalError(e);
+        }
+    }
+
+    // Initialize any miscellaneous operating system settings that need to be
+    // set for the class libraries.
+    //
+    public static void initializeOSEnvironment() {
+        if (initLevel() == 0) {
+            OSEnvironment.initialize();
+        }
+    }
+
+    /* Current count of objects pending for finalization */
+    private static volatile int finalRefCount;
+
+    /* Peak count of objects pending for finalization */
+    private static volatile int peakFinalRefCount;
+
+    /*
+     * Gets the number of objects pending for finalization.
+     *
+     * @return the number of objects pending for finalization.
+     */
+    public static int getFinalRefCount() {
+        return finalRefCount;
+    }
+
+    /*
+     * Gets the peak number of objects pending for finalization.
+     *
+     * @return the peak number of objects pending for finalization.
+     */
+    public static int getPeakFinalRefCount() {
+        return peakFinalRefCount;
+    }
+
+    /*
+     * Add {@code n} to the objects pending for finalization count.
+     *
+     * @param n an integer value to be added to the objects pending
+     * for finalization count
+     */
+    public static void addFinalRefCount(int n) {
+        // The caller must hold lock to synchronize the update.
+
+        finalRefCount += n;
+        if (finalRefCount > peakFinalRefCount) {
+            peakFinalRefCount = finalRefCount;
+        }
+    }
+
+    /**
+     * Returns Thread.State for the given threadStatus
+     */
+    public static Thread.State toThreadState(int threadStatus) {
+        if ((threadStatus & JVMTI_THREAD_STATE_RUNNABLE) != 0) {
+            return RUNNABLE;
+        } else if ((threadStatus & JVMTI_THREAD_STATE_BLOCKED_ON_MONITOR_ENTER) != 0) {
+            return BLOCKED;
+        } else if ((threadStatus & JVMTI_THREAD_STATE_WAITING_INDEFINITELY) != 0) {
+            return WAITING;
+        } else if ((threadStatus & JVMTI_THREAD_STATE_WAITING_WITH_TIMEOUT) != 0) {
+            return TIMED_WAITING;
+        } else if ((threadStatus & JVMTI_THREAD_STATE_TERMINATED) != 0) {
+            return TERMINATED;
+        } else if ((threadStatus & JVMTI_THREAD_STATE_ALIVE) == 0) {
+            return NEW;
+        } else {
+            return RUNNABLE;
+        }
+    }
+
+    /* The threadStatus field is set by the VM at state transition
+     * in the hotspot implementation. Its value is set according to
+     * the JVM TI specification GetThreadState function.
+     */
+    private static final int JVMTI_THREAD_STATE_ALIVE = 0x0001;
+    private static final int JVMTI_THREAD_STATE_TERMINATED = 0x0002;
+    private static final int JVMTI_THREAD_STATE_RUNNABLE = 0x0004;
+    private static final int JVMTI_THREAD_STATE_BLOCKED_ON_MONITOR_ENTER = 0x0400;
+    private static final int JVMTI_THREAD_STATE_WAITING_INDEFINITELY = 0x0010;
+    private static final int JVMTI_THREAD_STATE_WAITING_WITH_TIMEOUT = 0x0020;
+
+    /*
+     * Returns the first user-defined class loader up the execution stack,
+     * or the platform class loader if only code from the platform or
+     * bootstrap class loader is on the stack.
+     */
+    public static ClassLoader latestUserDefinedLoader() {
+        ClassLoader loader = latestUserDefinedLoader0();
+        return loader != null ? loader : ClassLoader.getPlatformClassLoader();
+    }
+
+    /*
+     * Returns the first user-defined class loader up the execution stack,
+     * or null if only code from the platform or bootstrap class loader is
+     * on the stack.  VM does not keep a reference of platform loader and so
+     * it returns null.
+     *
+     * This method should be replaced with StackWalker::walk and then we can
+     * remove the logic in the VM.
+     */
+    private static native ClassLoader latestUserDefinedLoader0();
+
+    /**
+     * Returns {@code true} if we are in a set UID program.
+     */
+    public static boolean isSetUID() {
+        long uid = getuid();
+        long euid = geteuid();
+        long gid = getgid();
+        long egid = getegid();
+        return uid != euid  || gid != egid;
+    }
+
+    /**
+     * Returns the real user ID of the calling process,
+     * or -1 if the value is not available.
+     */
+    public static native long getuid();
+
+    /**
+     * Returns the effective user ID of the calling process,
+     * or -1 if the value is not available.
+     */
+    public static native long geteuid();
+
+    /**
+     * Returns the real group ID of the calling process,
+     * or -1 if the value is not available.
+     */
+    public static native long getgid();
+
+    /**
+     * Returns the effective group ID of the calling process,
+     * or -1 if the value is not available.
+     */
+    public static native long getegid();
+
+    /**
+     * Get a nanosecond time stamp adjustment in the form of a single long.
+     *
+     * This value can be used to create an instant using
+     * {@link java.time.Instant#ofEpochSecond(long, long)
+     *  java.time.Instant.ofEpochSecond(offsetInSeconds,
+     *  getNanoTimeAdjustment(offsetInSeconds))}.
+     * <p>
+     * The value returned has the best resolution available to the JVM on
+     * the current system.
+     * This is usually down to microseconds - or tenth of microseconds -
+     * depending on the OS/Hardware and the JVM implementation.
+     *
+     * @param offsetInSeconds The offset in seconds from which the nanosecond
+     *        time stamp should be computed.
+     *
+     * @apiNote The offset should be recent enough - so that
+     *         {@code offsetInSeconds} is within {@code +/- 2^32} seconds of the
+     *         current UTC time. If the offset is too far off, {@code -1} will be
+     *         returned. As such, {@code -1} must not be considered as a valid
+     *         nano time adjustment, but as an exception value indicating
+     *         that an offset closer to the current time should be used.
+     *
+     * @return A nanosecond time stamp adjustment in the form of a single long.
+     *     If the offset is too far off the current time, this method returns -1.
+     *     In that case, the caller should call this method again, passing a
+     *     more accurate offset.
+     */
+    public static native long getNanoTimeAdjustment(long offsetInSeconds);
+
+    /**
+     * Returns the VM arguments for this runtime environment.
+     *
+     * @implNote
+     * The HotSpot JVM processes the input arguments from multiple sources
+     * in the following order:
+     * 1. JAVA_TOOL_OPTIONS environment variable
+     * 2. Options from JNI Invocation API
+     * 3. _JAVA_OPTIONS environment variable
+     *
+     * If VM options file is specified via -XX:VMOptionsFile, the vm options
+     * file is read and expanded in place of -XX:VMOptionFile option.
+     */
+    public static native String[] getRuntimeArguments();
+
+    static {
+        initialize();
+    }
+    private static native void initialize();
+
+    /**
+     * Provides access to information on buffer usage.
+     */
+    public interface BufferPool {
+        String getName();
+        long getCount();
+        long getTotalCapacity();
+        long getMemoryUsed();
+    }
+
+    private static class BufferPoolsHolder {
+        static final List<BufferPool> BUFFER_POOLS;
+
+        static {
+            ArrayList<BufferPool> bufferPools = new ArrayList<>(3);
+            bufferPools.add(SharedSecrets.getJavaNioAccess().getDirectBufferPool());
+            bufferPools.add(FileChannelImpl.getMappedBufferPool());
+            bufferPools.add(FileChannelImpl.getSyncMappedBufferPool());
+
+            BUFFER_POOLS = Collections.unmodifiableList(bufferPools);
+        }
+    }
+
+    /**
+     * @return the list of buffer pools.
+     */
+    public static List<BufferPool> getBufferPools() {
+        return BufferPoolsHolder.BUFFER_POOLS;
+    }
+
+    /**
+     * Return the initial value of System.err that was set during VM initialization.
+     */
+    public static PrintStream initialErr() {
+        return SharedSecrets.getJavaLangAccess().initialSystemErr();
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/misc/VirtualThreads.class b/tests/test_data/std/jdk/internal/misc/VirtualThreads.class
new file mode 100644
index 0000000000000000000000000000000000000000..ffb83813d6559afc0ed67ca104fc24d88b26e98a
GIT binary patch
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/misc/VirtualThreads.java b/tests/test_data/std/jdk/internal/misc/VirtualThreads.java
new file mode 100644
index 00000000..04a93afa
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/misc/VirtualThreads.java
@@ -0,0 +1,95 @@
+/*
+ * Copyright (c) 2018, 2022, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package jdk.internal.misc;
+
+import java.util.concurrent.TimeUnit;
+import java.util.concurrent.RejectedExecutionException;
+import jdk.internal.access.JavaLangAccess;
+import jdk.internal.access.SharedSecrets;
+
+/**
+ * Defines static methods to support execution in the context of a virtual thread.
+ */
+public final class VirtualThreads {
+    private static final JavaLangAccess JLA;
+    static {
+        JLA = SharedSecrets.getJavaLangAccess();
+        if (JLA == null) {
+            throw new InternalError("JavaLangAccess not setup");
+        }
+    }
+    private VirtualThreads() { }
+
+    /**
+     * Parks the current virtual thread until it is unparked or interrupted.
+     * If already unparked then the parking permit is consumed and this method
+     * completes immediately (meaning it doesn't yield). It also completes
+     * immediately if the interrupt status is set.
+     * @throws WrongThreadException if the current thread is not a virtual thread
+     */
+    public static void park() {
+        JLA.parkVirtualThread();
+    }
+
+    /**
+     * Parks the current virtual thread up to the given waiting time or until it
+     * is unparked or interrupted. If already unparked then the parking permit is
+     * consumed and this method completes immediately (meaning it doesn't yield).
+     * It also completes immediately if the interrupt status is set or the waiting
+     * time is {@code <= 0}.
+     * @param nanos the maximum number of nanoseconds to wait
+     * @throws WrongThreadException if the current thread is not a virtual thread
+     */
+    public static void park(long nanos) {
+        JLA.parkVirtualThread(nanos);
+    }
+
+    /**
+     * Parks the current virtual thread until the given deadline or until is is
+     * unparked or interrupted. If already unparked then the parking permit is
+     * consumed and this method completes immediately (meaning it doesn't yield).
+     * It also completes immediately if the interrupt status is set or the
+     * deadline has past.
+     * @param deadline absolute time, in milliseconds, from the epoch
+     * @throws WrongThreadException if the current thread is not a virtual thread
+     */
+    public static void parkUntil(long deadline) {
+        long millis = deadline - System.currentTimeMillis();
+        long nanos = TimeUnit.NANOSECONDS.convert(millis, TimeUnit.MILLISECONDS);
+        park(nanos);
+    }
+
+    /**
+     * Re-enables a virtual thread for scheduling. If the thread was parked then
+     * it will be unblocked, otherwise its next attempt to park will not block
+     * @param thread the virtual thread to unpark
+     * @throws IllegalArgumentException if the thread is not a virtual thread
+     * @throws RejectedExecutionException if the scheduler cannot accept a task
+     */
+    public static void unpark(Thread thread) {
+        JLA.unparkVirtualThread(thread);
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/module/ArchivedBootLayer.class b/tests/test_data/std/jdk/internal/module/ArchivedBootLayer.class
new file mode 100644
index 0000000000000000000000000000000000000000..6f03738c17298b862f0d1054d82be263b66fae59
GIT binary patch
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c!FJiP)^NXLO*0fd3x-Ez)?-3;3AfPt3l)p72LJ#7

literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/module/ArchivedBootLayer.java b/tests/test_data/std/jdk/internal/module/ArchivedBootLayer.java
new file mode 100644
index 00000000..5c806f81
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/module/ArchivedBootLayer.java
@@ -0,0 +1,56 @@
+/*
+ * Copyright (c) 2020, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package jdk.internal.module;
+
+import jdk.internal.misc.CDS;
+
+/**
+ * Used by ModuleBootstrap for archiving the boot layer.
+ */
+class ArchivedBootLayer {
+    private static ArchivedBootLayer archivedBootLayer;
+
+    private final ModuleLayer bootLayer;
+
+    private ArchivedBootLayer(ModuleLayer bootLayer) {
+        this.bootLayer = bootLayer;
+    }
+
+    ModuleLayer bootLayer() {
+        return bootLayer;
+    }
+
+    static ArchivedBootLayer get() {
+        return archivedBootLayer;
+    }
+
+    static void archive(ModuleLayer layer) {
+        archivedBootLayer = new ArchivedBootLayer(layer);
+    }
+
+    static {
+        CDS.initializeFromArchive(ArchivedBootLayer.class);
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/module/ArchivedModuleGraph.class b/tests/test_data/std/jdk/internal/module/ArchivedModuleGraph.class
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GIT binary patch
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/module/ArchivedModuleGraph.java b/tests/test_data/std/jdk/internal/module/ArchivedModuleGraph.java
new file mode 100644
index 00000000..8b91ab67
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/module/ArchivedModuleGraph.java
@@ -0,0 +1,113 @@
+/*
+ * Copyright (c) 2018, 2023, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package jdk.internal.module;
+
+import java.util.Objects;
+import java.util.function.Function;
+import java.lang.module.Configuration;
+import java.lang.module.ModuleFinder;
+import jdk.internal.misc.CDS;
+
+/**
+ * Used by ModuleBootstrap for archiving the configuration for the boot layer,
+ * and the system module finder.
+ */
+class ArchivedModuleGraph {
+    private static ArchivedModuleGraph archivedModuleGraph;
+
+    private final boolean hasSplitPackages;
+    private final boolean hasIncubatorModules;
+    private final ModuleFinder finder;
+    private final Configuration configuration;
+    private final Function<String, ClassLoader> classLoaderFunction;
+    private final String mainModule;
+
+    private ArchivedModuleGraph(boolean hasSplitPackages,
+                                boolean hasIncubatorModules,
+                                ModuleFinder finder,
+                                Configuration configuration,
+                                Function<String, ClassLoader> classLoaderFunction,
+                                String mainModule) {
+        this.hasSplitPackages = hasSplitPackages;
+        this.hasIncubatorModules = hasIncubatorModules;
+        this.finder = finder;
+        this.configuration = configuration;
+        this.classLoaderFunction = classLoaderFunction;
+        this.mainModule = mainModule;
+    }
+
+    ModuleFinder finder() {
+        return finder;
+    }
+
+    Configuration configuration() {
+        return configuration;
+    }
+
+    Function<String, ClassLoader> classLoaderFunction() {
+        return classLoaderFunction;
+    }
+
+    boolean hasSplitPackages() {
+        return hasSplitPackages;
+    }
+
+    boolean hasIncubatorModules() {
+        return hasIncubatorModules;
+    }
+
+    /**
+     * Returns the ArchivedModuleGraph for the given initial module.
+     */
+    static ArchivedModuleGraph get(String mainModule) {
+        ArchivedModuleGraph graph = archivedModuleGraph;
+        if ((graph != null) && Objects.equals(graph.mainModule, mainModule)) {
+            return graph;
+        } else {
+            return null;
+        }
+    }
+
+    /**
+     * Archive the module graph for the given initial module.
+     */
+    static void archive(boolean hasSplitPackages,
+                        boolean hasIncubatorModules,
+                        ModuleFinder finder,
+                        Configuration configuration,
+                        Function<String, ClassLoader> classLoaderFunction,
+                        String mainModule) {
+        archivedModuleGraph = new ArchivedModuleGraph(hasSplitPackages,
+                                                      hasIncubatorModules,
+                                                      finder,
+                                                      configuration,
+                                                      classLoaderFunction,
+                                                      mainModule);
+    }
+
+    static {
+        CDS.initializeFromArchive(ArchivedModuleGraph.class);
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/module/Builder.class b/tests/test_data/std/jdk/internal/module/Builder.class
new file mode 100644
index 0000000000000000000000000000000000000000..e810190c5131cad79936795b7e02196bd97cdf4c
GIT binary patch
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HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/module/Builder.java b/tests/test_data/std/jdk/internal/module/Builder.java
new file mode 100644
index 00000000..f12e2297
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/module/Builder.java
@@ -0,0 +1,282 @@
+/*
+ * Copyright (c) 2015, 2018, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package jdk.internal.module;
+
+import java.lang.module.ModuleDescriptor;
+import java.lang.module.ModuleDescriptor.Exports;
+import java.lang.module.ModuleDescriptor.Opens;
+import java.lang.module.ModuleDescriptor.Provides;
+import java.lang.module.ModuleDescriptor.Requires;
+import java.lang.module.ModuleDescriptor.Version;
+import java.util.List;
+import java.util.Set;
+
+import jdk.internal.access.JavaLangModuleAccess;
+import jdk.internal.access.SharedSecrets;
+
+/**
+ * This builder is optimized for reconstituting the {@code ModuleDescriptor}s
+ * for system modules.  The validation should be done at jlink time.
+ *
+ * 1. skip name validation
+ * 2. ignores dependency hashes.
+ * 3. ModuleDescriptor skips the defensive copy and directly uses the
+ *    sets/maps created in this Builder.
+ *
+ * SystemModules should contain modules for the boot layer.
+ */
+final class Builder {
+    private static final JavaLangModuleAccess JLMA =
+        SharedSecrets.getJavaLangModuleAccess();
+
+    // Static cache of the most recently seen Version to cheaply deduplicate
+    // most Version objects.  JDK modules have the same version.
+    static Version cachedVersion;
+
+    /**
+     * Returns a {@link Requires} for a dependence on a module with the given
+     * (and possibly empty) set of modifiers, and optionally the version
+     * recorded at compile time.
+     */
+    public static Requires newRequires(Set<Requires.Modifier> mods,
+                                       String mn,
+                                       String compiledVersion)
+    {
+        Version version = null;
+        if (compiledVersion != null) {
+            // use the cached version if the same version string
+            Version ver = cachedVersion;
+            if (ver != null && compiledVersion.equals(ver.toString())) {
+                version = ver;
+            } else {
+                version = Version.parse(compiledVersion);
+            }
+        }
+        return JLMA.newRequires(mods, mn, version);
+    }
+
+    /**
+     * Returns a {@link Requires} for a dependence on a module with the given
+     * (and possibly empty) set of modifiers, and optionally the version
+     * recorded at compile time.
+     */
+    public static Requires newRequires(Set<Requires.Modifier> mods,
+                                       String mn)
+    {
+        return newRequires(mods, mn, null);
+    }
+
+    /**
+     * Returns a {@link Exports} for a qualified export, with
+     * the given (and possibly empty) set of modifiers,
+     * to a set of target modules.
+     */
+    public static Exports newExports(Set<Exports.Modifier> ms,
+                                     String pn,
+                                     Set<String> targets) {
+        return JLMA.newExports(ms, pn, targets);
+    }
+
+    /**
+     * Returns an {@link Opens} for an unqualified open with a given set of
+     * modifiers.
+     */
+    public static Opens newOpens(Set<Opens.Modifier> ms, String pn) {
+        return JLMA.newOpens(ms, pn);
+    }
+
+    /**
+     * Returns an {@link Opens} for a qualified opens, with
+     * the given (and possibly empty) set of modifiers,
+     * to a set of target modules.
+     */
+    public static Opens newOpens(Set<Opens.Modifier> ms,
+                                 String pn,
+                                 Set<String> targets) {
+        return JLMA.newOpens(ms, pn, targets);
+    }
+
+    /**
+     * Returns a {@link Exports} for an unqualified export with a given set
+     * of modifiers.
+     */
+    public static Exports newExports(Set<Exports.Modifier> ms, String pn) {
+        return JLMA.newExports(ms, pn);
+    }
+
+    /**
+     * Returns a {@link Provides} for a service with a given list of
+     * implementation classes.
+     */
+    public static Provides newProvides(String st, List<String> pcs) {
+        return JLMA.newProvides(st, pcs);
+    }
+
+    final String name;
+    boolean open, synthetic, mandated;
+    Set<Requires> requires;
+    Set<Exports> exports;
+    Set<Opens> opens;
+    Set<String> packages;
+    Set<String> uses;
+    Set<Provides> provides;
+    Version version;
+    String mainClass;
+
+    Builder(String name) {
+        this.name = name;
+        this.requires = Set.of();
+        this.exports = Set.of();
+        this.opens = Set.of();
+        this.provides = Set.of();
+        this.uses = Set.of();
+    }
+
+    Builder open(boolean value) {
+        this.open = value;
+        return this;
+    }
+
+    Builder synthetic(boolean value) {
+        this.synthetic = value;
+        return this;
+    }
+
+    Builder mandated(boolean value) {
+        this.mandated = value;
+        return this;
+    }
+
+    /**
+     * Sets module exports.
+     */
+    public Builder exports(Exports[] exports) {
+        this.exports = Set.of(exports);
+        return this;
+    }
+
+    /**
+     * Sets module opens.
+     */
+    public Builder opens(Opens[] opens) {
+        this.opens = Set.of(opens);
+        return this;
+    }
+
+    /**
+     * Sets module requires.
+     */
+    public Builder requires(Requires[] requires) {
+        this.requires = Set.of(requires);
+        return this;
+    }
+
+    /**
+     * Adds a set of (possible empty) packages.
+     */
+    public Builder packages(Set<String> packages) {
+        this.packages = packages;
+        return this;
+    }
+
+    /**
+     * Sets the set of service dependences.
+     */
+    public Builder uses(Set<String> uses) {
+        this.uses = uses;
+        return this;
+    }
+
+    /**
+     * Sets module provides.
+     */
+    public Builder provides(Provides[] provides) {
+        this.provides = Set.of(provides);
+        return this;
+    }
+
+    /**
+     * Sets the module version.
+     *
+     * @throws IllegalArgumentException if {@code v} is null or cannot be
+     *         parsed as a version string
+     *
+     * @see Version#parse(String)
+     */
+    public Builder version(String v) {
+        Version ver = cachedVersion;
+        if (ver != null && v.equals(ver.toString())) {
+            version = ver;
+        } else {
+            cachedVersion = version = Version.parse(v);
+        }
+        return this;
+    }
+
+    /**
+     * Sets the module main class.
+     */
+    public Builder mainClass(String mc) {
+        mainClass = mc;
+        return this;
+    }
+
+    /**
+     * Returns an immutable set of the module modifiers derived from the flags.
+     */
+    private Set<ModuleDescriptor.Modifier> modifiers() {
+        int n = 0;
+        if (open) n++;
+        if (synthetic) n++;
+        if (mandated) n++;
+        if (n == 0) {
+            return Set.of();
+        } else {
+            ModuleDescriptor.Modifier[] mods = new ModuleDescriptor.Modifier[n];
+            if (open) mods[--n] = ModuleDescriptor.Modifier.OPEN;
+            if (synthetic) mods[--n] = ModuleDescriptor.Modifier.SYNTHETIC;
+            if (mandated) mods[--n] = ModuleDescriptor.Modifier.MANDATED;
+            return Set.of(mods);
+        }
+    }
+
+    /**
+     * Builds a {@code ModuleDescriptor} from the components.
+     */
+    public ModuleDescriptor build(int hashCode) {
+        assert name != null;
+        return JLMA.newModuleDescriptor(name,
+                                        version,
+                                        modifiers(),
+                                        requires,
+                                        exports,
+                                        opens,
+                                        uses,
+                                        provides,
+                                        packages,
+                                        mainClass,
+                                        hashCode);
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/module/Checks.class b/tests/test_data/std/jdk/internal/module/Checks.class
new file mode 100644
index 0000000000000000000000000000000000000000..7bacba633c9f826c44132d4f581aa14a4777b9c9
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HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/module/Checks.java b/tests/test_data/std/jdk/internal/module/Checks.java
new file mode 100644
index 00000000..7965391f
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/module/Checks.java
@@ -0,0 +1,247 @@
+/*
+ * Copyright (c) 2009, 2021, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package jdk.internal.module;
+
+import java.util.Set;
+
+/**
+ * Utility class for checking module, package, and class names.
+ */
+
+public final class Checks {
+
+    private Checks() { }
+
+    /**
+     * Checks a name to ensure that it's a legal module name.
+     *
+     * @throws IllegalArgumentException if name is null or not a legal
+     *         module name
+     */
+    public static String requireModuleName(String name) {
+        if (name == null)
+            throw new IllegalArgumentException("Null module name");
+        int next;
+        int off = 0;
+        while ((next = name.indexOf('.', off)) != -1) {
+            String id = name.substring(off, next);
+            if (!isJavaIdentifier(id)) {
+                throw new IllegalArgumentException(name + ": Invalid module name"
+                        + ": '" + id + "' is not a Java identifier");
+            }
+            off = next+1;
+        }
+        String last = name.substring(off);
+        if (!isJavaIdentifier(last)) {
+            throw new IllegalArgumentException(name + ": Invalid module name"
+                    + ": '" + last + "' is not a Java identifier");
+        }
+        return name;
+    }
+
+    /**
+     * Checks a name to ensure that it's a legal package name.
+     *
+     * @throws IllegalArgumentException if name is null or not a legal
+     *         package name
+     */
+    public static String requirePackageName(String name) {
+        return requireTypeName("package name", name);
+    }
+
+    /**
+     * Returns {@code true} if the given name is a legal package name.
+     */
+    public static boolean isPackageName(String name) {
+        return isTypeName(name);
+    }
+
+    /**
+     * Checks a name to ensure that it's a legal qualified class name
+     *
+     * @throws IllegalArgumentException if name is null or not a legal
+     *         qualified class name
+     */
+    public static String requireServiceTypeName(String name) {
+        return requireQualifiedClassName("service type name", name);
+    }
+
+    /**
+     * Checks a name to ensure that it's a legal qualified class name.
+     *
+     * @throws IllegalArgumentException if name is null or not a legal
+     *         qualified class name
+     */
+    public static String requireServiceProviderName(String name) {
+        return requireQualifiedClassName("service provider name", name);
+    }
+
+    /**
+     * Checks a name to ensure that it's a legal qualified class name in
+     * a named package.
+     *
+     * @throws IllegalArgumentException if name is null or not a legal
+     *         qualified class name in a named package
+     */
+    public static String requireQualifiedClassName(String what, String name) {
+        requireTypeName(what, name);
+        if (name.indexOf('.') == -1)
+            throw new IllegalArgumentException(name + ": is not a qualified name of"
+                                               + " a Java class in a named package");
+        return name;
+    }
+
+    /**
+     * Returns {@code true} if the given name is a legal class name.
+     */
+    public static boolean isClassName(String name) {
+        return isTypeName(name);
+    }
+
+    /**
+     * Returns {@code true} if the given name is a legal type name.
+     */
+    private static boolean isTypeName(String name) {
+        int next;
+        int off = 0;
+        while ((next = name.indexOf('.', off)) != -1) {
+            String id = name.substring(off, next);
+            if (!isJavaIdentifier(id))
+                return false;
+            off = next+1;
+        }
+        String last = name.substring(off);
+        return isJavaIdentifier(last);
+    }
+
+    /**
+     * Checks if the given name is a legal type name.
+     *
+     * @throws IllegalArgumentException if name is null or not a legal
+     *         type name
+     */
+    private static String requireTypeName(String what, String name) {
+        if (name == null)
+            throw new IllegalArgumentException("Null " + what);
+        int next;
+        int off = 0;
+        while ((next = name.indexOf('.', off)) != -1) {
+            String id = name.substring(off, next);
+            if (!isJavaIdentifier(id)) {
+                throw new IllegalArgumentException(name + ": Invalid " + what
+                        + ": '" + id + "' is not a Java identifier");
+            }
+            off = next + 1;
+        }
+        String last = name.substring(off);
+        if (!isJavaIdentifier(last)) {
+            throw new IllegalArgumentException(name + ": Invalid " + what
+                    + ": '" + last + "' is not a Java identifier");
+        }
+        return name;
+    }
+
+    /**
+     * Returns true if the given string is a legal Java identifier,
+     * otherwise false.
+     */
+    public static boolean isJavaIdentifier(String str) {
+        if (str.isEmpty() || RESERVED.contains(str))
+            return false;
+
+        int first = Character.codePointAt(str, 0);
+        if (!Character.isJavaIdentifierStart(first))
+            return false;
+
+        int i = Character.charCount(first);
+        while (i < str.length()) {
+            int cp = Character.codePointAt(str, i);
+            if (!Character.isJavaIdentifierPart(cp))
+                return false;
+            i += Character.charCount(cp);
+        }
+
+        return true;
+    }
+
+    // keywords, boolean and null literals, not allowed in identifiers
+    private static final Set<String> RESERVED = Set.of(
+            "abstract",
+            "assert",
+            "boolean",
+            "break",
+            "byte",
+            "case",
+            "catch",
+            "char",
+            "class",
+            "const",
+            "continue",
+            "default",
+            "do",
+            "double",
+            "else",
+            "enum",
+            "extends",
+            "final",
+            "finally",
+            "float",
+            "for",
+            "goto",
+            "if",
+            "implements",
+            "import",
+            "instanceof",
+            "int",
+            "interface",
+            "long",
+            "native",
+            "new",
+            "package",
+            "private",
+            "protected",
+            "public",
+            "return",
+            "short",
+            "static",
+            "strictfp",
+            "super",
+            "switch",
+            "synchronized",
+            "this",
+            "throw",
+            "throws",
+            "transient",
+            "try",
+            "void",
+            "volatile",
+            "while",
+            "true",
+            "false",
+            "null",
+            "_"
+    );
+}
diff --git a/tests/test_data/std/jdk/internal/module/ClassFileConstants.class b/tests/test_data/std/jdk/internal/module/ClassFileConstants.class
new file mode 100644
index 0000000000000000000000000000000000000000..703e5448002c964ef847564a36661c8a27fd0591
GIT binary patch
literal 1132
zcma)+TT|0O6vxlD1!5_*R1^^}-~|Ddc)!6oF3FZ=Op{KM*5N6$EtwJs$xM?vKKhk>
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zwR^`wKO-=`8^&Swo<MP9vpWL{f%W6V6E%#pU>NgAJxvZrQJ`uOPt!&i1zHlP8IQ9R
zkG5>RV=@AD^KV=?8;0><hrry#+2zqFP+(3R$b%7>b?uI$F~4D$Oo1AKvYU*C{XitZ
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z(P=Ljdb}r|wr(bU9(DOJ6nrL@vZD|mY{UG&!Nb{F`ga_+#R$S0%;3ZW)L|JeK^c27
zEA9dn<avp!$O{q+|DwcKke4LBhJ0P(737-|-$GuMcn$e3+&j;IA9-Ek2gn;2cvIpn
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VZ0Z~QR>lT+3-6F{BJo>*oj=E!)=>Ze

literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/module/ClassFileConstants.java b/tests/test_data/std/jdk/internal/module/ClassFileConstants.java
new file mode 100644
index 00000000..66e241ee
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/module/ClassFileConstants.java
@@ -0,0 +1,60 @@
+/*
+ * Copyright (c) 2015, 2017, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package jdk.internal.module;
+
+
+// Constants in module-info.class files
+
+public class ClassFileConstants {
+
+    private ClassFileConstants() { }
+
+    // Attribute names
+    public static final String MODULE             = "Module";
+    public static final String SOURCE_FILE        = "SourceFile";
+    public static final String SDE                = "SourceDebugExtension";
+
+    public static final String MODULE_PACKAGES    = "ModulePackages";
+    public static final String MODULE_MAIN_CLASS  = "ModuleMainClass";
+    public static final String MODULE_TARGET      = "ModuleTarget";
+    public static final String MODULE_HASHES      = "ModuleHashes";
+    public static final String MODULE_RESOLUTION  = "ModuleResolution";
+
+    // access, requires, exports, and opens flags
+    public static final int ACC_MODULE        = 0x8000;
+    public static final int ACC_OPEN          = 0x0020;
+    public static final int ACC_TRANSITIVE    = 0x0020;
+    public static final int ACC_STATIC_PHASE  = 0x0040;
+    public static final int ACC_SYNTHETIC     = 0x1000;
+    public static final int ACC_MANDATED      = 0x8000;
+
+    // ModuleResolution_attribute resolution flags
+    public static final int DO_NOT_RESOLVE_BY_DEFAULT   = 0x0001;
+    public static final int WARN_DEPRECATED             = 0x0002;
+    public static final int WARN_DEPRECATED_FOR_REMOVAL = 0x0004;
+    public static final int WARN_INCUBATING             = 0x0008;
+
+}
diff --git a/tests/test_data/std/jdk/internal/module/DefaultRoots.class b/tests/test_data/std/jdk/internal/module/DefaultRoots.class
new file mode 100644
index 0000000000000000000000000000000000000000..18d0d3115f68bf86dbd9c3aaa9b2de6185ed77d3
GIT binary patch
literal 3677
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/module/DefaultRoots.java b/tests/test_data/std/jdk/internal/module/DefaultRoots.java
new file mode 100644
index 00000000..54c7a2c1
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/module/DefaultRoots.java
@@ -0,0 +1,81 @@
+/*
+ * Copyright (c) 2017, 2018, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package jdk.internal.module;
+
+import java.lang.module.ModuleDescriptor;
+import java.lang.module.ModuleFinder;
+import java.lang.module.ModuleReference;
+import java.util.Set;
+import java.util.stream.Collectors;
+
+/**
+ * Defines methods to compute the default set of root modules for the unnamed
+ * module.
+ */
+
+public final class DefaultRoots {
+    private DefaultRoots() { }
+
+    /**
+     * Returns the default set of root modules for the unnamed module from the
+     * modules observable with the intersection of two module finders.
+     *
+     * The first module finder should be the module finder that finds modules on
+     * the upgrade module path or among the system modules. The second module
+     * finder should be the module finder that finds all modules on the module
+     * path, or a subset of when using --limit-modules.
+     */
+    static Set<String> compute(ModuleFinder finder1, ModuleFinder finder2) {
+        return finder1.findAll().stream()
+                .filter(mref -> !ModuleResolution.doNotResolveByDefault(mref))
+                .map(ModuleReference::descriptor)
+                .filter(descriptor -> finder2.find(descriptor.name()).isPresent()
+                                      && exportsAPI(descriptor))
+                .map(ModuleDescriptor::name)
+                .collect(Collectors.toSet());
+    }
+
+    /**
+     * Returns the default set of root modules for the unnamed module from the
+     * modules observable with the given module finder.
+     *
+     * This method is used by the jlink system modules plugin.
+     */
+    public static Set<String> compute(ModuleFinder finder) {
+        return compute(finder, finder);
+    }
+
+    /**
+     * Returns true if the given module exports a package to all modules
+     */
+    private static boolean exportsAPI(ModuleDescriptor descriptor) {
+        return descriptor.exports()
+                .stream()
+                .filter(e -> !e.isQualified())
+                .findAny()
+                .isPresent();
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/module/ExplodedSystemModules.class b/tests/test_data/std/jdk/internal/module/ExplodedSystemModules.class
new file mode 100644
index 0000000000000000000000000000000000000000..a2212e8b05876e084e4ee54b6753145ba9f1bf31
GIT binary patch
literal 1251
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E7ja?*3;+NC

literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/module/ExplodedSystemModules.java b/tests/test_data/std/jdk/internal/module/ExplodedSystemModules.java
new file mode 100644
index 00000000..c276647e
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/module/ExplodedSystemModules.java
@@ -0,0 +1,71 @@
+/*
+ * Copyright (c) 2017, 2021, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package jdk.internal.module;
+
+import java.lang.module.ModuleDescriptor;
+import java.util.Map;
+import java.util.Set;
+
+/**
+ * A dummy SystemModules for use with exploded builds or testing.
+ */
+
+class ExplodedSystemModules implements SystemModules {
+    @Override
+    public boolean hasSplitPackages() {
+        return true;  // not known
+    }
+
+    @Override
+    public boolean hasIncubatorModules() {
+        return true;  // not known
+    }
+
+    @Override
+    public ModuleDescriptor[] moduleDescriptors() {
+        throw new InternalError();
+    }
+
+    @Override
+    public ModuleTarget[] moduleTargets() {
+        throw new InternalError();
+    }
+
+    @Override
+    public ModuleHashes[] moduleHashes() {
+        throw new InternalError();
+    }
+
+    @Override
+    public ModuleResolution[] moduleResolutions() {
+        throw new InternalError();
+    }
+
+    @Override
+    public Map<String, Set<String>> moduleReads() {
+        throw new InternalError();
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/module/ModuleBootstrap$1.class b/tests/test_data/std/jdk/internal/module/ModuleBootstrap$1.class
new file mode 100644
index 0000000000000000000000000000000000000000..b4b6407112962aa84bd43496b84943c0df8cc206
GIT binary patch
literal 1353
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new file mode 100644
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diff --git a/tests/test_data/std/jdk/internal/module/ModuleBootstrap.class b/tests/test_data/std/jdk/internal/module/ModuleBootstrap.class
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diff --git a/tests/test_data/std/jdk/internal/module/ModuleBootstrap.java b/tests/test_data/std/jdk/internal/module/ModuleBootstrap.java
new file mode 100644
index 00000000..b97b0a2d
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/module/ModuleBootstrap.java
@@ -0,0 +1,1088 @@
+/*
+ * Copyright (c) 2014, 2024, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package jdk.internal.module;
+
+import java.io.File;
+import java.io.PrintStream;
+import java.lang.module.Configuration;
+import java.lang.module.ModuleDescriptor;
+import java.lang.module.ModuleFinder;
+import java.lang.module.ModuleReference;
+import java.lang.module.ResolvedModule;
+import java.net.URI;
+import java.nio.file.Path;
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.HashMap;
+import java.util.HashSet;
+import java.util.LinkedHashMap;
+import java.util.List;
+import java.util.Map;
+import java.util.Objects;
+import java.util.Optional;
+import java.util.Set;
+import java.util.function.Function;
+import java.util.stream.Collectors;
+
+import jdk.internal.access.JavaLangAccess;
+import jdk.internal.access.JavaLangModuleAccess;
+import jdk.internal.access.SharedSecrets;
+import jdk.internal.loader.BootLoader;
+import jdk.internal.loader.BuiltinClassLoader;
+import jdk.internal.loader.ClassLoaders;
+import jdk.internal.misc.CDS;
+import jdk.internal.perf.PerfCounter;
+
+/**
+ * Initializes/boots the module system.
+ *
+ * The {@link #boot() boot} method is called early in the startup to initialize
+ * the module system. In summary, the boot method creates a Configuration by
+ * resolving a set of module names specified via the launcher (or equivalent)
+ * -m and --add-modules options. The modules are located on a module path that
+ * is constructed from the upgrade module path, system modules, and application
+ * module path. The Configuration is instantiated as the boot layer with each
+ * module in the configuration defined to a class loader.
+ */
+
+public final class ModuleBootstrap {
+    private ModuleBootstrap() { }
+
+    private static final String JAVA_BASE = "java.base";
+
+    // the token for "all default modules"
+    private static final String ALL_DEFAULT = "ALL-DEFAULT";
+
+    // the token for "all unnamed modules"
+    private static final String ALL_UNNAMED = "ALL-UNNAMED";
+
+    // the token for "all system modules"
+    private static final String ALL_SYSTEM = "ALL-SYSTEM";
+
+    // the token for "all modules on the module path"
+    private static final String ALL_MODULE_PATH = "ALL-MODULE-PATH";
+
+    // access to java.lang/module
+    private static final JavaLangAccess JLA = SharedSecrets.getJavaLangAccess();
+    private static final JavaLangModuleAccess JLMA = SharedSecrets.getJavaLangModuleAccess();
+
+    // The ModulePatcher for the initial configuration
+    private static final ModulePatcher patcher = initModulePatcher();
+
+    /**
+     * Returns the ModulePatcher for the initial configuration.
+     */
+    public static ModulePatcher patcher() {
+        return patcher;
+    }
+
+    // ModuleFinders for the initial configuration
+    private static volatile ModuleFinder unlimitedFinder;
+    private static volatile ModuleFinder limitedFinder;
+
+    /**
+     * Returns the ModuleFinder for the initial configuration before
+     * observability is limited by the --limit-modules command line option.
+     *
+     * @apiNote Used to support locating modules {@code java.instrument} and
+     * {@code jdk.management.agent} modules when they are loaded dynamically.
+     */
+    public static ModuleFinder unlimitedFinder() {
+        ModuleFinder finder = unlimitedFinder;
+        if (finder == null) {
+            return ModuleFinder.ofSystem();
+        } else {
+            return finder;
+        }
+    }
+
+    /**
+     * Returns the ModuleFinder for the initial configuration.
+     *
+     * @apiNote Used to support "{@code java --list-modules}".
+     */
+    public static ModuleFinder limitedFinder() {
+        ModuleFinder finder = limitedFinder;
+        if (finder == null) {
+            return unlimitedFinder();
+        } else {
+            return finder;
+        }
+    }
+
+    /**
+     * Returns true if the archived boot layer can be used. The system properties
+     * are checked in the order that they are used by boot2.
+     */
+    private static boolean canUseArchivedBootLayer() {
+        return getProperty("jdk.module.upgrade.path") == null &&
+               getProperty("jdk.module.path") == null &&
+               getProperty("jdk.module.patch.0") == null &&       // --patch-module
+               getProperty("jdk.module.addmods.0") == null  &&    // --add-modules
+               getProperty("jdk.module.limitmods") == null &&     // --limit-modules
+               getProperty("jdk.module.addreads.0") == null &&    // --add-reads
+               getProperty("jdk.module.addexports.0") == null &&  // --add-exports
+               getProperty("jdk.module.addopens.0") == null;      // --add-opens
+    }
+
+    /**
+     * Initialize the module system, returning the boot layer. The boot layer
+     * is obtained from the CDS archive if possible, otherwise it is generated
+     * from the module graph.
+     *
+     * @see java.lang.System#initPhase2(boolean, boolean)
+     */
+    public static ModuleLayer boot() {
+        Counters.start();
+
+        ModuleLayer bootLayer;
+        ArchivedBootLayer archivedBootLayer = ArchivedBootLayer.get();
+        if (archivedBootLayer != null) {
+            assert canUseArchivedBootLayer();
+            bootLayer = archivedBootLayer.bootLayer();
+            BootLoader.getUnnamedModule(); // trigger <clinit> of BootLoader.
+            CDS.defineArchivedModules(ClassLoaders.platformClassLoader(), ClassLoaders.appClassLoader());
+
+            // assume boot layer has at least one module providing a service
+            // that is mapped to the application class loader.
+            JLA.bindToLoader(bootLayer, ClassLoaders.appClassLoader());
+        } else {
+            bootLayer = boot2();
+        }
+
+        Counters.publish("jdk.module.boot.totalTime");
+        return bootLayer;
+    }
+
+    private static ModuleLayer boot2() {
+        // Step 0: Command line options
+
+        ModuleFinder upgradeModulePath = finderFor("jdk.module.upgrade.path");
+        ModuleFinder appModulePath = finderFor("jdk.module.path");
+        boolean isPatched = patcher.hasPatches();
+        String mainModule = System.getProperty("jdk.module.main");
+        Set<String> addModules = addModules();
+        Set<String> limitModules = limitModules();
+
+        PrintStream traceOutput = null;
+        String trace = getAndRemoveProperty("jdk.module.showModuleResolution");
+        if (trace != null && Boolean.parseBoolean(trace))
+            traceOutput = System.out;
+
+        Counters.add("jdk.module.boot.0.commandLineTime");
+
+        // Step 1: The observable system modules, either all system modules
+        // or the system modules pre-generated for the initial module (the
+        // initial module may be the unnamed module). If the system modules
+        // are pre-generated for the initial module then resolution can be
+        // skipped.
+
+        SystemModules systemModules = null;
+        ModuleFinder systemModuleFinder;
+
+        boolean haveModulePath = (appModulePath != null || upgradeModulePath != null);
+        boolean needResolution = true;
+        boolean canArchive = false;
+        boolean hasSplitPackages;
+        boolean hasIncubatorModules;
+
+        // If the java heap was archived at CDS dump time and the environment
+        // at dump time matches the current environment then use the archived
+        // system modules and finder.
+        ArchivedModuleGraph archivedModuleGraph = ArchivedModuleGraph.get(mainModule);
+        if (archivedModuleGraph != null
+                && !haveModulePath
+                && addModules.isEmpty()
+                && limitModules.isEmpty()
+                && !isPatched) {
+            systemModuleFinder = archivedModuleGraph.finder();
+            hasSplitPackages = archivedModuleGraph.hasSplitPackages();
+            hasIncubatorModules = archivedModuleGraph.hasIncubatorModules();
+            needResolution = (traceOutput != null);
+        } else {
+            if (!haveModulePath && addModules.isEmpty() && limitModules.isEmpty()) {
+                systemModules = SystemModuleFinders.systemModules(mainModule);
+                if (systemModules != null && !isPatched) {
+                    needResolution = (traceOutput != null);
+                    if (CDS.isDumpingStaticArchive())
+                        canArchive = true;
+                }
+            }
+            if (systemModules == null) {
+                // all system modules are observable
+                systemModules = SystemModuleFinders.allSystemModules();
+            }
+            if (systemModules != null) {
+                // images build
+                systemModuleFinder = SystemModuleFinders.of(systemModules);
+            } else {
+                // exploded build or testing
+                systemModules = new ExplodedSystemModules();
+                systemModuleFinder = SystemModuleFinders.ofSystem();
+            }
+
+            hasSplitPackages = systemModules.hasSplitPackages();
+            hasIncubatorModules = systemModules.hasIncubatorModules();
+            // not using the archived module graph - avoid accidental use
+            archivedModuleGraph = null;
+        }
+
+        Counters.add("jdk.module.boot.1.systemModulesTime");
+
+        // Step 2: Define and load java.base. This patches all classes loaded
+        // to date so that they are members of java.base. Once java.base is
+        // loaded then resources in java.base are available for error messages
+        // needed from here on.
+
+        ModuleReference base = systemModuleFinder.find(JAVA_BASE).orElse(null);
+        if (base == null)
+            throw new InternalError(JAVA_BASE + " not found");
+        URI baseUri = base.location().orElse(null);
+        if (baseUri == null)
+            throw new InternalError(JAVA_BASE + " does not have a location");
+        BootLoader.loadModule(base);
+
+        Module baseModule = Modules.defineModule(null, base.descriptor(), baseUri);
+        JLA.addEnableNativeAccess(baseModule);
+
+        // Step 2a: Scan all modules when --validate-modules specified
+
+        if (getAndRemoveProperty("jdk.module.validation") != null) {
+            int errors = ModulePathValidator.scanAllModules(System.out);
+            if (errors > 0) {
+                fail("Validation of module path failed");
+            }
+        }
+
+        Counters.add("jdk.module.boot.2.defineBaseTime");
+
+        // Step 3: If resolution is needed then create the module finder and
+        // the set of root modules to resolve.
+
+        ModuleFinder savedModuleFinder = null;
+        ModuleFinder finder;
+        Set<String> roots;
+        if (needResolution) {
+
+            // upgraded modules override the modules in the run-time image
+            if (upgradeModulePath != null)
+                systemModuleFinder = ModuleFinder.compose(upgradeModulePath,
+                                                          systemModuleFinder);
+
+            // The module finder: [--upgrade-module-path] system [--module-path]
+            if (appModulePath != null) {
+                finder = ModuleFinder.compose(systemModuleFinder, appModulePath);
+            } else {
+                finder = systemModuleFinder;
+            }
+
+            // The root modules to resolve
+            roots = new HashSet<>();
+
+            // launcher -m option to specify the main/initial module
+            if (mainModule != null)
+                roots.add(mainModule);
+
+            // additional module(s) specified by --add-modules
+            boolean addAllDefaultModules = false;
+            boolean addAllSystemModules = false;
+            boolean addAllApplicationModules = false;
+            for (String mod : addModules) {
+                switch (mod) {
+                    case ALL_DEFAULT:
+                        addAllDefaultModules = true;
+                        break;
+                    case ALL_SYSTEM:
+                        addAllSystemModules = true;
+                        break;
+                    case ALL_MODULE_PATH:
+                        addAllApplicationModules = true;
+                        break;
+                    default:
+                        roots.add(mod);
+                }
+            }
+
+            // --limit-modules
+            savedModuleFinder = finder;
+            if (!limitModules.isEmpty()) {
+                finder = limitFinder(finder, limitModules, roots);
+            }
+
+            // If there is no initial module specified then assume that the initial
+            // module is the unnamed module of the application class loader. This
+            // is implemented by resolving all observable modules that export an
+            // API. Modules that have the DO_NOT_RESOLVE_BY_DEFAULT bit set in
+            // their ModuleResolution attribute flags are excluded from the
+            // default set of roots.
+            if (mainModule == null || addAllDefaultModules) {
+                roots.addAll(DefaultRoots.compute(systemModuleFinder, finder));
+            }
+
+            // If `--add-modules ALL-SYSTEM` is specified then all observable system
+            // modules will be resolved.
+            if (addAllSystemModules) {
+                ModuleFinder f = finder;  // observable modules
+                systemModuleFinder.findAll()
+                    .stream()
+                    .map(ModuleReference::descriptor)
+                    .map(ModuleDescriptor::name)
+                    .filter(mn -> f.find(mn).isPresent())  // observable
+                    .forEach(mn -> roots.add(mn));
+            }
+
+            // If `--add-modules ALL-MODULE-PATH` is specified then all observable
+            // modules on the application module path will be resolved.
+            if (appModulePath != null && addAllApplicationModules) {
+                ModuleFinder f = finder;  // observable modules
+                appModulePath.findAll()
+                    .stream()
+                    .map(ModuleReference::descriptor)
+                    .map(ModuleDescriptor::name)
+                    .filter(mn -> f.find(mn).isPresent())  // observable
+                    .forEach(mn -> roots.add(mn));
+            }
+        } else {
+            // no resolution case
+            finder = systemModuleFinder;
+            roots = null;
+        }
+
+        Counters.add("jdk.module.boot.3.optionsAndRootsTime");
+
+        // Step 4: Resolve the root modules, with service binding, to create
+        // the configuration for the boot layer. If resolution is not needed
+        // then create the configuration for the boot layer from the
+        // readability graph created at link time.
+
+        Configuration cf;
+        if (needResolution) {
+            cf = Modules.newBootLayerConfiguration(finder, roots, traceOutput);
+        } else {
+            if (archivedModuleGraph != null) {
+                cf = archivedModuleGraph.configuration();
+            } else {
+                Map<String, Set<String>> map = systemModules.moduleReads();
+                cf = JLMA.newConfiguration(systemModuleFinder, map);
+            }
+        }
+
+        // check that modules specified to --patch-module are resolved
+        if (isPatched) {
+            patcher.patchedModules()
+                    .stream()
+                    .filter(mn -> cf.findModule(mn).isEmpty())
+                    .forEach(mn -> warnUnknownModule(PATCH_MODULE, mn));
+        }
+
+        Counters.add("jdk.module.boot.4.resolveTime");
+
+        // Step 5: Map the modules in the configuration to class loaders.
+        // The static configuration provides the mapping of standard and JDK
+        // modules to the boot and platform loaders. All other modules (JDK
+        // tool modules, and both explicit and automatic modules on the
+        // application module path) are defined to the application class
+        // loader.
+
+        // mapping of modules to class loaders
+        Function<String, ClassLoader> clf;
+        if (archivedModuleGraph != null) {
+            clf = archivedModuleGraph.classLoaderFunction();
+        } else {
+            clf = ModuleLoaderMap.mappingFunction(cf);
+        }
+
+        // check that all modules to be mapped to the boot loader will be
+        // loaded from the runtime image
+        if (haveModulePath) {
+            for (ResolvedModule resolvedModule : cf.modules()) {
+                ModuleReference mref = resolvedModule.reference();
+                String name = mref.descriptor().name();
+                ClassLoader cl = clf.apply(name);
+                if (cl == null) {
+                    if (upgradeModulePath != null
+                            && upgradeModulePath.find(name).isPresent())
+                        fail(name + ": cannot be loaded from upgrade module path");
+                    if (systemModuleFinder.find(name).isEmpty())
+                        fail(name + ": cannot be loaded from application module path");
+                }
+            }
+        }
+
+        // check for split packages in the modules mapped to the built-in loaders
+        if (hasSplitPackages || isPatched || haveModulePath) {
+            checkSplitPackages(cf, clf);
+        }
+
+        // load/register the modules with the built-in class loaders
+        loadModules(cf, clf);
+        Counters.add("jdk.module.boot.5.loadModulesTime");
+
+        // Step 6: Define all modules to the VM
+
+        ModuleLayer bootLayer = ModuleLayer.empty().defineModules(cf, clf);
+        Counters.add("jdk.module.boot.6.layerCreateTime");
+
+        // Step 7: Miscellaneous
+
+        // check incubating status
+        if (hasIncubatorModules || haveModulePath) {
+            checkIncubatingStatus(cf);
+        }
+
+        // --add-reads, --add-exports/--add-opens
+        addExtraReads(bootLayer);
+        boolean extraExportsOrOpens = addExtraExportsAndOpens(bootLayer);
+
+        // add enable native access
+        addEnableNativeAccess(bootLayer);
+
+        Counters.add("jdk.module.boot.7.adjustModulesTime");
+
+        // save module finders for later use
+        if (savedModuleFinder != null) {
+            unlimitedFinder = new SafeModuleFinder(savedModuleFinder);
+            if (savedModuleFinder != finder)
+                limitedFinder = new SafeModuleFinder(finder);
+        }
+
+        // If -Xshare:dump and mainModule are specified, check if the mainModule
+        // is in the runtime image and not on the upgrade module path. If so,
+        // set canArchive to true so that the module graph can be archived.
+        if (CDS.isDumpingStaticArchive() && mainModule != null) {
+            String scheme = systemModuleFinder.find(mainModule)
+                    .stream()
+                    .map(ModuleReference::location)
+                    .flatMap(Optional::stream)
+                    .findAny()
+                    .map(URI::getScheme)
+                    .orElse(null);
+            if ("jrt".equalsIgnoreCase(scheme)) {
+                canArchive = true;
+            }
+        }
+
+        // Archive module graph and boot layer can be archived at CDS dump time.
+        if (canArchive) {
+            ArchivedModuleGraph.archive(hasSplitPackages,
+                                        hasIncubatorModules,
+                                        systemModuleFinder,
+                                        cf,
+                                        clf,
+                                        mainModule);
+            if (!hasSplitPackages && !hasIncubatorModules) {
+                ArchivedBootLayer.archive(bootLayer);
+            }
+        }
+
+        return bootLayer;
+    }
+
+    /**
+     * Load/register the modules to the built-in class loaders.
+     */
+    private static void loadModules(Configuration cf,
+                                    Function<String, ClassLoader> clf) {
+        for (ResolvedModule resolvedModule : cf.modules()) {
+            ModuleReference mref = resolvedModule.reference();
+            String name = resolvedModule.name();
+            ClassLoader loader = clf.apply(name);
+            if (loader == null) {
+                // skip java.base as it is already loaded
+                if (!name.equals(JAVA_BASE)) {
+                    BootLoader.loadModule(mref);
+                }
+            } else if (loader instanceof BuiltinClassLoader) {
+                ((BuiltinClassLoader) loader).loadModule(mref);
+            }
+        }
+    }
+
+    /**
+     * Checks for split packages between modules defined to the built-in class
+     * loaders.
+     */
+    private static void checkSplitPackages(Configuration cf,
+                                           Function<String, ClassLoader> clf) {
+        Map<String, String> packageToModule = new HashMap<>();
+        for (ResolvedModule resolvedModule : cf.modules()) {
+            ModuleDescriptor descriptor = resolvedModule.reference().descriptor();
+            String name = descriptor.name();
+            ClassLoader loader = clf.apply(name);
+            if (loader == null || loader instanceof BuiltinClassLoader) {
+                for (String p : descriptor.packages()) {
+                    String other = packageToModule.putIfAbsent(p, name);
+                    if (other != null) {
+                        String msg = "Package " + p + " in both module "
+                                     + name + " and module " + other;
+                        throw new LayerInstantiationException(msg);
+                    }
+                }
+            }
+        }
+    }
+
+    /**
+     * Returns a ModuleFinder that limits observability to the given root
+     * modules, their transitive dependences, plus a set of other modules.
+     */
+    private static ModuleFinder limitFinder(ModuleFinder finder,
+                                            Set<String> roots,
+                                            Set<String> otherMods)
+    {
+        // resolve all root modules
+        Configuration cf = Configuration.empty().resolve(finder,
+                                                         ModuleFinder.of(),
+                                                         roots);
+
+        // module name -> reference
+        Map<String, ModuleReference> map = new HashMap<>();
+
+        // root modules and their transitive dependences
+        cf.modules().stream()
+            .map(ResolvedModule::reference)
+            .forEach(mref -> map.put(mref.descriptor().name(), mref));
+
+        // additional modules
+        otherMods.stream()
+            .map(finder::find)
+            .flatMap(Optional::stream)
+            .forEach(mref -> map.putIfAbsent(mref.descriptor().name(), mref));
+
+        // set of modules that are observable
+        Set<ModuleReference> mrefs = new HashSet<>(map.values());
+
+        return new ModuleFinder() {
+            @Override
+            public Optional<ModuleReference> find(String name) {
+                return Optional.ofNullable(map.get(name));
+            }
+            @Override
+            public Set<ModuleReference> findAll() {
+                return mrefs;
+            }
+        };
+    }
+
+    /**
+     * Creates a finder from the module path that is the value of the given
+     * system property and optionally patched by --patch-module
+     */
+    private static ModuleFinder finderFor(String prop) {
+        String s = System.getProperty(prop);
+        if (s == null) {
+            return null;
+        } else {
+            String[] dirs = s.split(File.pathSeparator);
+            Path[] paths = new Path[dirs.length];
+            int i = 0;
+            for (String dir: dirs) {
+                paths[i++] = Path.of(dir);
+            }
+            return ModulePath.of(patcher, paths);
+        }
+    }
+
+    /**
+     * Initialize the module patcher for the initial configuration passed on the
+     * value of the --patch-module options.
+     */
+    private static ModulePatcher initModulePatcher() {
+        Map<String, List<String>> map = decode("jdk.module.patch.",
+                                               File.pathSeparator,
+                                               false);
+        return new ModulePatcher(map);
+    }
+
+    /**
+     * Returns the set of module names specified by --add-module options.
+     */
+    private static Set<String> addModules() {
+        String prefix = "jdk.module.addmods.";
+        int index = 0;
+        // the system property is removed after decoding
+        String value = getAndRemoveProperty(prefix + index);
+        if (value == null) {
+            return Set.of();
+        } else {
+            Set<String> modules = new HashSet<>();
+            while (value != null) {
+                for (String s : value.split(",")) {
+                    if (!s.isEmpty())
+                        modules.add(s);
+                }
+                index++;
+                value = getAndRemoveProperty(prefix + index);
+            }
+            return modules;
+        }
+    }
+
+    /**
+     * Returns the set of module names specified by --limit-modules.
+     */
+    private static Set<String> limitModules() {
+        String value = getAndRemoveProperty("jdk.module.limitmods");
+        if (value == null) {
+            return Set.of();
+        } else {
+            Set<String> names = new HashSet<>();
+            for (String name : value.split(",")) {
+                if (name.length() > 0) names.add(name);
+            }
+            return names;
+        }
+    }
+
+    /**
+     * Process the --add-reads options to add any additional read edges that
+     * are specified on the command-line.
+     */
+    private static void addExtraReads(ModuleLayer bootLayer) {
+
+        // decode the command line options
+        Map<String, List<String>> map = decode("jdk.module.addreads.");
+        if (map.isEmpty())
+            return;
+
+        for (Map.Entry<String, List<String>> e : map.entrySet()) {
+
+            // the key is $MODULE
+            String mn = e.getKey();
+            Optional<Module> om = bootLayer.findModule(mn);
+            if (om.isEmpty()) {
+                warnUnknownModule(ADD_READS, mn);
+                continue;
+            }
+            Module m = om.get();
+
+            // the value is the set of other modules (by name)
+            for (String name : e.getValue()) {
+                if (ALL_UNNAMED.equals(name)) {
+                    Modules.addReadsAllUnnamed(m);
+                } else {
+                    om = bootLayer.findModule(name);
+                    if (om.isPresent()) {
+                        Modules.addReads(m, om.get());
+                    } else {
+                        warnUnknownModule(ADD_READS, name);
+                    }
+                }
+            }
+        }
+    }
+
+    /**
+     * Process the --add-exports and --add-opens options to export/open
+     * additional packages specified on the command-line.
+     */
+    private static boolean addExtraExportsAndOpens(ModuleLayer bootLayer) {
+        boolean extraExportsOrOpens = false;
+
+        // --add-exports
+        String prefix = "jdk.module.addexports.";
+        Map<String, List<String>> extraExports = decode(prefix);
+        if (!extraExports.isEmpty()) {
+            addExtraExportsOrOpens(bootLayer, extraExports, false);
+            extraExportsOrOpens = true;
+        }
+
+
+        // --add-opens
+        prefix = "jdk.module.addopens.";
+        Map<String, List<String>> extraOpens = decode(prefix);
+        if (!extraOpens.isEmpty()) {
+            addExtraExportsOrOpens(bootLayer, extraOpens, true);
+            extraExportsOrOpens = true;
+        }
+
+        return extraExportsOrOpens;
+    }
+
+    private static void addExtraExportsOrOpens(ModuleLayer bootLayer,
+                                               Map<String, List<String>> map,
+                                               boolean opens)
+    {
+        String option = opens ? ADD_OPENS : ADD_EXPORTS;
+        for (Map.Entry<String, List<String>> e : map.entrySet()) {
+
+            // the key is $MODULE/$PACKAGE
+            String key = e.getKey();
+            String[] s = key.split("/");
+            if (s.length != 2)
+                fail(unableToParse(option, "<module>/<package>", key));
+
+            String mn = s[0];
+            String pn = s[1];
+            if (mn.isEmpty() || pn.isEmpty())
+                fail(unableToParse(option, "<module>/<package>", key));
+
+            // The exporting module is in the boot layer
+            Module m;
+            Optional<Module> om = bootLayer.findModule(mn);
+            if (om.isEmpty()) {
+                warnUnknownModule(option, mn);
+                continue;
+            }
+
+            m = om.get();
+
+            if (!m.getDescriptor().packages().contains(pn)) {
+                warn("package " + pn + " not in " + mn);
+                continue;
+            }
+
+            // the value is the set of modules to export to (by name)
+            for (String name : e.getValue()) {
+                boolean allUnnamed = false;
+                Module other = null;
+                if (ALL_UNNAMED.equals(name)) {
+                    allUnnamed = true;
+                } else {
+                    om = bootLayer.findModule(name);
+                    if (om.isPresent()) {
+                        other = om.get();
+                    } else {
+                        warnUnknownModule(option, name);
+                        continue;
+                    }
+                }
+                if (allUnnamed) {
+                    if (opens) {
+                        Modules.addOpensToAllUnnamed(m, pn);
+                    } else {
+                        Modules.addExportsToAllUnnamed(m, pn);
+                    }
+                } else {
+                    if (opens) {
+                        Modules.addOpens(m, pn, other);
+                    } else {
+                        Modules.addExports(m, pn, other);
+                    }
+                }
+            }
+        }
+    }
+
+    private static final boolean HAS_ENABLE_NATIVE_ACCESS_FLAG;
+    private static final Set<String> USER_NATIVE_ACCESS_MODULES;
+    private static final Set<String> JDK_NATIVE_ACCESS_MODULES;
+
+    public static boolean hasEnableNativeAccessFlag() {
+        return HAS_ENABLE_NATIVE_ACCESS_FLAG;
+    }
+
+    static {
+        USER_NATIVE_ACCESS_MODULES = decodeEnableNativeAccess();
+        HAS_ENABLE_NATIVE_ACCESS_FLAG = !USER_NATIVE_ACCESS_MODULES.isEmpty();
+        JDK_NATIVE_ACCESS_MODULES = ModuleLoaderMap.nativeAccessModules();
+    }
+
+    /**
+     * Grants native access to modules selected using the --enable-native-access
+     * command line option, and also to JDK modules that need the access.
+     */
+    private static void addEnableNativeAccess(ModuleLayer layer) {
+        addEnableNativeAccess(layer, USER_NATIVE_ACCESS_MODULES, true);
+        addEnableNativeAccess(layer, JDK_NATIVE_ACCESS_MODULES, false);
+    }
+
+    /**
+     * Grants native access for the given modules in the given layer.
+     * Warns optionally about modules that were specified, but not present in the layer.
+     */
+    private static void addEnableNativeAccess(ModuleLayer layer, Set<String> moduleNames, boolean shouldWarn) {
+        for (String name : moduleNames) {
+            if (name.equals("ALL-UNNAMED")) {
+                JLA.addEnableNativeAccessToAllUnnamed();
+            } else if (!JLA.addEnableNativeAccess(layer, name) && shouldWarn) {
+                warnUnknownModule(ENABLE_NATIVE_ACCESS, name);
+            }
+        }
+    }
+
+    /**
+     * Returns the set of module names specified by --enable-native-access options.
+     */
+    private static Set<String> decodeEnableNativeAccess() {
+        String prefix = "jdk.module.enable.native.access.";
+        int index = 0;
+        // the system property is removed after decoding
+        String value = getAndRemoveProperty(prefix + index);
+        Set<String> modules = new HashSet<>();
+        if (value == null) {
+            return modules;
+        }
+        while (value != null) {
+            for (String s : value.split(",")) {
+                if (!s.isEmpty())
+                    modules.add(s);
+            }
+            index++;
+            value = getAndRemoveProperty(prefix + index);
+        }
+        return modules;
+    }
+
+    /**
+     * Decodes the values of --add-reads, -add-exports, --add-opens or
+     * --patch-modules options that are encoded in system properties.
+     *
+     * @param prefix the system property prefix
+     * @praam regex the regex for splitting the RHS of the option value
+     */
+    private static Map<String, List<String>> decode(String prefix,
+                                                    String regex,
+                                                    boolean allowDuplicates) {
+        int index = 0;
+        // the system property is removed after decoding
+        String value = getAndRemoveProperty(prefix + index);
+        if (value == null)
+            return Map.of();
+
+        Map<String, List<String>> map = new HashMap<>();
+
+        while (value != null) {
+
+            int pos = value.indexOf('=');
+            if (pos == -1)
+                fail(unableToParse(option(prefix), "<module>=<value>", value));
+            if (pos == 0)
+                fail(unableToParse(option(prefix), "<module>=<value>", value));
+
+            // key is <module> or <module>/<package>
+            String key = value.substring(0, pos);
+
+            String rhs = value.substring(pos+1);
+            if (rhs.isEmpty())
+                fail(unableToParse(option(prefix), "<module>=<value>", value));
+
+            // value is <module>(,<module>)* or <file>(<pathsep><file>)*
+            if (!allowDuplicates && map.containsKey(key))
+                fail(key + " specified more than once to " + option(prefix));
+            List<String> values = map.computeIfAbsent(key, k -> new ArrayList<>());
+            int ntargets = 0;
+            for (String s : rhs.split(regex)) {
+                if (!s.isEmpty()) {
+                    values.add(s);
+                    ntargets++;
+                }
+            }
+            if (ntargets == 0)
+                fail("Target must be specified: " + option(prefix) + " " + value);
+
+            index++;
+            value = getAndRemoveProperty(prefix + index);
+        }
+
+        return map;
+    }
+
+    /**
+     * Decodes the values of --add-reads, -add-exports or --add-opens
+     * which use the "," to separate the RHS of the option value.
+     */
+    private static Map<String, List<String>> decode(String prefix) {
+        return decode(prefix, ",", true);
+    }
+
+
+    /**
+     * Gets the named system property
+     */
+    private static String getProperty(String key) {
+        return System.getProperty(key);
+    }
+
+    /**
+     * Gets and remove the named system property
+     */
+    private static String getAndRemoveProperty(String key) {
+        return (String) System.getProperties().remove(key);
+    }
+
+    /**
+     * Checks incubating status of modules in the configuration
+     */
+    private static void checkIncubatingStatus(Configuration cf) {
+        String incubating = null;
+        for (ResolvedModule resolvedModule : cf.modules()) {
+            ModuleReference mref = resolvedModule.reference();
+
+            // emit warning if the WARN_INCUBATING module resolution bit set
+            if (ModuleResolution.hasIncubatingWarning(mref)) {
+                String mn = mref.descriptor().name();
+                if (incubating == null) {
+                    incubating = mn;
+                } else {
+                    incubating += ", " + mn;
+                }
+            }
+        }
+        if (incubating != null)
+            warn("Using incubator modules: " + incubating);
+    }
+
+    /**
+     * Throws a RuntimeException with the given message
+     */
+    static void fail(String m) {
+        throw new RuntimeException(m);
+    }
+
+    static void warn(String m) {
+        System.err.println("WARNING: " + m);
+    }
+
+    static void warnUnknownModule(String option, String mn) {
+        warn("Unknown module: " + mn + " specified to " + option);
+    }
+
+    static String unableToParse(String option, String text, String value) {
+        return "Unable to parse " +  option + " " + text + ": " + value;
+    }
+
+    private static final String ADD_MODULES  = "--add-modules";
+    private static final String ADD_EXPORTS  = "--add-exports";
+    private static final String ADD_OPENS    = "--add-opens";
+    private static final String ADD_READS    = "--add-reads";
+    private static final String PATCH_MODULE = "--patch-module";
+    private static final String ENABLE_NATIVE_ACCESS = "--enable-native-access";
+
+    /*
+     * Returns the command-line option name corresponds to the specified
+     * system property prefix.
+     */
+    static String option(String prefix) {
+        switch (prefix) {
+            case "jdk.module.addexports.":
+                return ADD_EXPORTS;
+            case "jdk.module.addopens.":
+                return ADD_OPENS;
+            case "jdk.module.addreads.":
+                return ADD_READS;
+            case "jdk.module.patch.":
+                return PATCH_MODULE;
+            case "jdk.module.addmods.":
+                return ADD_MODULES;
+            default:
+                throw new IllegalArgumentException(prefix);
+        }
+    }
+
+    /**
+     * Wraps a (potentially not thread safe) ModuleFinder created during startup
+     * for use after startup.
+     */
+    static class SafeModuleFinder implements ModuleFinder {
+        private final Set<ModuleReference> mrefs;
+        private volatile Map<String, ModuleReference> nameToModule;
+
+        SafeModuleFinder(ModuleFinder finder) {
+            this.mrefs = Collections.unmodifiableSet(finder.findAll());
+        }
+        @Override
+        public Optional<ModuleReference> find(String name) {
+            Objects.requireNonNull(name);
+            Map<String, ModuleReference> nameToModule = this.nameToModule;
+            if (nameToModule == null) {
+                this.nameToModule = nameToModule = mrefs.stream()
+                        .collect(Collectors.toMap(m -> m.descriptor().name(),
+                                                  Function.identity()));
+            }
+            return Optional.ofNullable(nameToModule.get(name));
+        }
+        @Override
+        public Set<ModuleReference> findAll() {
+            return mrefs;
+        }
+    }
+
+    /**
+     * Counters for startup performance analysis.
+     */
+    static class Counters {
+        private static final boolean PUBLISH_COUNTERS;
+        private static final boolean PRINT_COUNTERS;
+        private static Map<String, Long> counters;
+        private static long startTime;
+        private static long previousTime;
+
+        static {
+            String s = System.getProperty("jdk.module.boot.usePerfData");
+            if (s == null) {
+                PUBLISH_COUNTERS = false;
+                PRINT_COUNTERS = false;
+            } else {
+                PUBLISH_COUNTERS = true;
+                PRINT_COUNTERS = s.equals("debug");
+                counters = new LinkedHashMap<>();  // preserve insert order
+            }
+        }
+
+        /**
+         * Start counting time.
+         */
+        static void start() {
+            if (PUBLISH_COUNTERS) {
+                startTime = previousTime = System.nanoTime();
+            }
+        }
+
+        /**
+         * Add a counter - storing the time difference between now and the
+         * previous add or the start.
+         */
+        static void add(String name) {
+            if (PUBLISH_COUNTERS) {
+                long current = System.nanoTime();
+                long elapsed = current - previousTime;
+                previousTime = current;
+                counters.put(name, elapsed);
+            }
+        }
+
+        /**
+         * Publish the counters to the instrumentation buffer or stdout.
+         */
+        static void publish(String totalTimeName) {
+            if (PUBLISH_COUNTERS) {
+                long currentTime = System.nanoTime();
+                for (Map.Entry<String, Long> e : counters.entrySet()) {
+                    String name = e.getKey();
+                    long value = e.getValue();
+                    PerfCounter.newPerfCounter(name).set(value);
+                    if (PRINT_COUNTERS)
+                        System.out.println(name + " = " + value);
+                }
+                long elapsedTotal = currentTime - startTime;
+                PerfCounter.newPerfCounter(totalTimeName).set(elapsedTotal);
+                if (PRINT_COUNTERS)
+                    System.out.println(totalTimeName + " = " + elapsedTotal);
+            }
+        }
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/module/ModuleHashes$Builder.class b/tests/test_data/std/jdk/internal/module/ModuleHashes$Builder.class
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GIT binary patch
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zmC-g=+kMH0K<MOb+3CQ9(RB6S&w?v#KA-Jg329a}?!a$_k*VRW#mi+uj%?V6W#vPR
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/module/ModuleHashes.class b/tests/test_data/std/jdk/internal/module/ModuleHashes.class
new file mode 100644
index 0000000000000000000000000000000000000000..cebda888202c7f94ad5e7d89b4ee03bc7bed4ee5
GIT binary patch
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/module/ModuleHashes.java b/tests/test_data/std/jdk/internal/module/ModuleHashes.java
new file mode 100644
index 00000000..a3eaea5b
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/module/ModuleHashes.java
@@ -0,0 +1,254 @@
+/*
+ * Copyright (c) 2015, 2020, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package jdk.internal.module;
+
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.UncheckedIOException;
+import java.lang.module.ModuleReader;
+import java.lang.module.ModuleReference;
+import java.nio.charset.StandardCharsets;
+import java.security.MessageDigest;
+import java.security.NoSuchAlgorithmException;
+import java.util.Arrays;
+import java.util.Collections;
+import java.util.HashMap;
+import java.util.Map;
+import java.util.Objects;
+import java.util.Set;
+import java.util.TreeMap;
+import java.util.function.Supplier;
+import java.util.stream.Stream;
+
+/**
+ * The result of hashing the contents of a number of module artifacts.
+ */
+
+public final class ModuleHashes {
+
+    /**
+     * A supplier of a message digest.
+     */
+    public static interface HashSupplier {
+        byte[] generate(String algorithm);
+    }
+
+    private final String algorithm;
+    private final Map<String, byte[]> nameToHash;
+
+    /**
+     * Creates a {@code ModuleHashes}.
+     *
+     * @param algorithm   the algorithm used to create the hashes
+     * @param nameToHash  the map of module name to hash value
+     */
+    ModuleHashes(String algorithm, Map<String, byte[]> nameToHash) {
+        this.algorithm = Objects.requireNonNull(algorithm);
+        this.nameToHash = Collections.unmodifiableMap(nameToHash);
+    }
+
+    /**
+     * Returns the algorithm used to hash the modules ("SHA-256" for example).
+     */
+    public String algorithm() {
+        return algorithm;
+    }
+
+    /**
+     * Returns the set of module names for which hashes are recorded.
+     */
+    public Set<String> names() {
+        return nameToHash.keySet();
+    }
+
+    /**
+     * Returns the hash for the given module name, {@code null}
+     * if there is no hash recorded for the module.
+     */
+    public byte[] hashFor(String mn) {
+        return nameToHash.get(mn);
+    }
+
+    /**
+     * Returns unmodifiable map of module name to hash
+     */
+    public Map<String, byte[]> hashes() {
+        return nameToHash;
+    }
+
+    /**
+     * Computes a hash from the names and content of a module.
+     *
+     * @param reader the module reader to access the module content
+     * @param algorithm the name of the message digest algorithm to use
+     * @return the hash
+     * @throws IllegalArgumentException if digest algorithm is not supported
+     * @throws UncheckedIOException if an I/O error occurs
+     */
+    private static byte[] computeHash(ModuleReader reader, String algorithm) {
+        MessageDigest md;
+        try {
+            md = MessageDigest.getInstance(algorithm);
+        } catch (NoSuchAlgorithmException e) {
+            throw new IllegalArgumentException(e);
+        }
+        byte[] buf = new byte[32*1024];
+        try (Stream<String> stream = reader.list()) {
+            stream.sorted().forEach(rn -> {
+                md.update(rn.getBytes(StandardCharsets.UTF_8));
+                try (InputStream in = reader.open(rn).orElseThrow()) {
+                    int n;
+                    while ((n = in.read(buf)) > 0) {
+                        md.update(buf, 0, n);
+                    }
+                } catch (IOException ioe) {
+                    throw new UncheckedIOException(ioe);
+                }
+            });
+        } catch (IOException ioe) {
+            throw new UncheckedIOException(ioe);
+        }
+        return md.digest();
+    }
+
+    /**
+     * Computes a hash from the names and content of a module.
+     *
+     * @param supplier supplies the module reader to access the module content
+     * @param algorithm the name of the message digest algorithm to use
+     * @return the hash
+     * @throws IllegalArgumentException if digest algorithm is not supported
+     * @throws UncheckedIOException if an I/O error occurs
+     */
+    static byte[] computeHash(Supplier<ModuleReader> supplier, String algorithm) {
+        try (ModuleReader reader = supplier.get()) {
+            return computeHash(reader, algorithm);
+        } catch (IOException ioe) {
+            throw new UncheckedIOException(ioe);
+        }
+    }
+
+    /**
+     * Computes the hash from the names and content of a set of modules. Returns
+     * a {@code ModuleHashes} to encapsulate the result.
+     *
+     * @param mrefs the set of modules
+     * @param algorithm the name of the message digest algorithm to use
+     * @return ModuleHashes that encapsulates the hashes
+     * @throws IllegalArgumentException if digest algorithm is not supported
+     * @throws UncheckedIOException if an I/O error occurs
+     */
+    static ModuleHashes generate(Set<ModuleReference> mrefs, String algorithm) {
+        Map<String, byte[]> nameToHash = new TreeMap<>();
+        for (ModuleReference mref : mrefs) {
+            try (ModuleReader reader = mref.open()) {
+                byte[] hash = computeHash(reader, algorithm);
+                nameToHash.put(mref.descriptor().name(), hash);
+            } catch (IOException ioe) {
+                throw new UncheckedIOException(ioe);
+            }
+        }
+        return new ModuleHashes(algorithm, nameToHash);
+    }
+
+    @Override
+    public int hashCode() {
+        int h = algorithm.hashCode();
+        for (Map.Entry<String, byte[]> e : nameToHash.entrySet()) {
+            h = h * 31 + e.getKey().hashCode();
+            h = h * 31 + Arrays.hashCode(e.getValue());
+        }
+        return h;
+    }
+
+    @Override
+    public boolean equals(Object obj) {
+        if (!(obj instanceof ModuleHashes))
+            return false;
+        ModuleHashes other = (ModuleHashes) obj;
+        if (!algorithm.equals(other.algorithm)
+                || nameToHash.size() != other.nameToHash.size())
+            return false;
+        for (Map.Entry<String, byte[]> e : nameToHash.entrySet()) {
+            String name = e.getKey();
+            byte[] hash = e.getValue();
+            if (!Arrays.equals(hash, other.nameToHash.get(name)))
+                return false;
+        }
+        return true;
+    }
+
+    @Override
+    public String toString() {
+        StringBuilder sb = new StringBuilder(algorithm);
+        sb.append(" ");
+        nameToHash.entrySet()
+                .stream()
+                .sorted(Map.Entry.comparingByKey())
+                .forEach(e -> {
+                    sb.append(e.getKey());
+                    sb.append("=");
+                    byte[] ba = e.getValue();
+                    for (byte b : ba) {
+                        sb.append(String.format("%02x", b & 0xff));
+                    }
+                });
+        return sb.toString();
+    }
+
+    /**
+     * This is used by jdk.internal.module.SystemModules class
+     * generated at link time.
+     */
+    public static class Builder {
+        final String algorithm;
+        final Map<String, byte[]> nameToHash;
+
+        Builder(String algorithm, int initialCapacity) {
+            this.nameToHash = new HashMap<>(initialCapacity);
+            this.algorithm =  Objects.requireNonNull(algorithm);
+        }
+
+        /**
+         * Sets the module hash for the given module name
+         */
+        public Builder hashForModule(String mn, byte[] hash) {
+            nameToHash.put(mn, hash);
+            return this;
+        }
+
+        /**
+         * Builds a {@code ModuleHashes}.
+         */
+        public ModuleHashes build() {
+            if (!nameToHash.isEmpty()) {
+                return new ModuleHashes(algorithm, nameToHash);
+            } else {
+                return null;
+            }
+        }
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/module/ModuleHashesBuilder$Graph$Builder.class b/tests/test_data/std/jdk/internal/module/ModuleHashesBuilder$Graph$Builder.class
new file mode 100644
index 0000000000000000000000000000000000000000..be45e1616085d431a697f315c13a3344cf3a6dfd
GIT binary patch
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diff --git a/tests/test_data/std/jdk/internal/module/ModuleHashesBuilder$Graph.class b/tests/test_data/std/jdk/internal/module/ModuleHashesBuilder$Graph.class
new file mode 100644
index 0000000000000000000000000000000000000000..1e115259c0b2b7667be6410a7f0bcd05f1c7a339
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diff --git a/tests/test_data/std/jdk/internal/module/ModuleHashesBuilder$TopoSorter.class b/tests/test_data/std/jdk/internal/module/ModuleHashesBuilder$TopoSorter.class
new file mode 100644
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diff --git a/tests/test_data/std/jdk/internal/module/ModuleHashesBuilder.class b/tests/test_data/std/jdk/internal/module/ModuleHashesBuilder.class
new file mode 100644
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HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/module/ModuleHashesBuilder.java b/tests/test_data/std/jdk/internal/module/ModuleHashesBuilder.java
new file mode 100644
index 00000000..cebca6fb
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/module/ModuleHashesBuilder.java
@@ -0,0 +1,287 @@
+/*
+ * Copyright (c) 2017, 2020, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package jdk.internal.module;
+
+import java.io.PrintStream;
+import java.lang.module.Configuration;
+import java.lang.module.ModuleReference;
+import java.lang.module.ResolvedModule;
+import java.util.ArrayDeque;
+import java.util.Collections;
+import java.util.Deque;
+import java.util.HashMap;
+import java.util.TreeMap;
+import java.util.HashSet;
+import java.util.Map;
+import java.util.Set;
+import java.util.function.Consumer;
+import java.util.stream.Stream;
+import static java.util.stream.Collectors.*;
+
+/**
+ * A Builder to compute ModuleHashes from a given configuration
+ */
+public class ModuleHashesBuilder {
+    private final Configuration configuration;
+    private final Set<String> hashModuleCandidates;
+
+    /**
+     * Constructs a ModuleHashesBuilder that finds the packaged modules
+     * from the location of ModuleReference found from the given Configuration.
+     *
+     * @param config Configuration for building module hashes
+     * @param modules the candidate modules to be hashed
+     */
+    public ModuleHashesBuilder(Configuration config, Set<String> modules) {
+        this.configuration = config;
+        this.hashModuleCandidates = modules;
+    }
+
+    /**
+     * Returns a map of a module M to ModuleHashes for the modules
+     * that depend upon M directly or indirectly.
+     *
+     * The key for each entry in the returned map is a module M that has
+     * no outgoing edges to any of the candidate modules to be hashed
+     * i.e. M is a leaf node in a connected subgraph containing M and
+     * other candidate modules from the module graph filtering
+     * the outgoing edges from M to non-candidate modules.
+     */
+    public Map<String, ModuleHashes> computeHashes(Set<String> roots) {
+        // build a graph containing the packaged modules and
+        // its transitive dependences matching --hash-modules
+        Graph.Builder<String> builder = new Graph.Builder<>();
+        Deque<ResolvedModule> todo = new ArrayDeque<>(configuration.modules());
+        Set<ResolvedModule> visited = new HashSet<>();
+        ResolvedModule rm;
+        while ((rm = todo.poll()) != null) {
+            if (visited.add(rm)) {
+                builder.addNode(rm.name());
+                for (ResolvedModule dm : rm.reads()) {
+                    if (!visited.contains(dm)) {
+                        todo.push(dm);
+                    }
+                    builder.addEdge(rm.name(), dm.name());
+                }
+            }
+        }
+
+        // each node in a transposed graph is a matching packaged module
+        // in which the hash of the modules that depend upon it is recorded
+        Graph<String> transposedGraph = builder.build().transpose();
+
+        // traverse the modules in topological order that will identify
+        // the modules to record the hashes - it is the first matching
+        // module and has not been hashed during the traversal.
+        Set<String> mods = new HashSet<>();
+        Map<String, ModuleHashes> hashes = new TreeMap<>();
+        builder.build()
+               .orderedNodes()
+               .filter(mn -> roots.contains(mn) && !mods.contains(mn))
+               .forEach(mn -> {
+                   // Compute hashes of the modules that depend on mn directly and
+                   // indirectly excluding itself.
+                   Set<String> ns = transposedGraph.dfs(mn)
+                       .stream()
+                       .filter(n -> !n.equals(mn) && hashModuleCandidates.contains(n))
+                       .collect(toSet());
+                   mods.add(mn);
+                   mods.addAll(ns);
+
+                   if (!ns.isEmpty()) {
+                       Set<ModuleReference> mrefs = ns.stream()
+                               .map(name -> configuration.findModule(name)
+                                                         .orElseThrow(InternalError::new))
+                               .map(ResolvedModule::reference)
+                               .collect(toSet());
+                       hashes.put(mn, ModuleHashes.generate(mrefs, "SHA-256"));
+                   }
+               });
+        return hashes;
+    }
+
+    /*
+     * Utility class
+     */
+    static class Graph<T> {
+        private final Set<T> nodes;
+        private final Map<T, Set<T>> edges;
+
+        public Graph(Set<T> nodes, Map<T, Set<T>> edges) {
+            this.nodes = Collections.unmodifiableSet(nodes);
+            this.edges = Collections.unmodifiableMap(edges);
+        }
+
+        public Set<T> nodes() {
+            return nodes;
+        }
+
+        public Map<T, Set<T>> edges() {
+            return edges;
+        }
+
+        public Set<T> adjacentNodes(T u) {
+            return edges.get(u);
+        }
+
+        public boolean contains(T u) {
+            return nodes.contains(u);
+        }
+
+        /**
+         * Returns nodes sorted in topological order.
+         */
+        public Stream<T> orderedNodes() {
+            TopoSorter<T> sorter = new TopoSorter<>(this);
+            return sorter.result.stream();
+        }
+
+        /**
+         * Traverses this graph and performs the given action in topological order.
+         */
+        public void ordered(Consumer<T> action) {
+            TopoSorter<T> sorter = new TopoSorter<>(this);
+            sorter.ordered(action);
+        }
+
+        /**
+         * Traverses this graph and performs the given action in reverse topological order.
+         */
+        public void reverse(Consumer<T> action) {
+            TopoSorter<T> sorter = new TopoSorter<>(this);
+            sorter.reverse(action);
+        }
+
+        /**
+         * Returns a transposed graph from this graph.
+         */
+        public Graph<T> transpose() {
+            Builder<T> builder = new Builder<>();
+            nodes.forEach(builder::addNode);
+            // reverse edges
+            edges.keySet().forEach(u -> {
+                edges.get(u).forEach(v -> builder.addEdge(v, u));
+            });
+            return builder.build();
+        }
+
+        /**
+         * Returns all nodes reachable from the given root.
+         */
+        public Set<T> dfs(T root) {
+            return dfs(Set.of(root));
+        }
+
+        /**
+         * Returns all nodes reachable from the given set of roots.
+         */
+        public Set<T> dfs(Set<T> roots) {
+            ArrayDeque<T> todo = new ArrayDeque<>(roots);
+            Set<T> visited = new HashSet<>();
+            T u;
+            while ((u = todo.poll()) != null) {
+                if (visited.add(u) && contains(u)) {
+                    adjacentNodes(u).stream()
+                        .filter(v -> !visited.contains(v))
+                        .forEach(todo::push);
+                }
+            }
+            return visited;
+        }
+
+        public void printGraph(PrintStream out) {
+            out.println("graph for " + nodes);
+            nodes
+                .forEach(u -> adjacentNodes(u)
+                    .forEach(v -> out.format("  %s -> %s%n", u, v)));
+        }
+
+        static class Builder<T> {
+            final Set<T> nodes = new HashSet<>();
+            final Map<T, Set<T>> edges = new HashMap<>();
+
+            public void addNode(T node) {
+                if (nodes.add(node)) {
+                    edges.computeIfAbsent(node, _e -> new HashSet<>());
+                }
+            }
+
+            public void addEdge(T u, T v) {
+                addNode(u);
+                addNode(v);
+                edges.get(u).add(v);
+            }
+
+            public Graph<T> build() {
+                return new Graph<T>(nodes, edges);
+            }
+        }
+    }
+
+    /**
+     * Topological sort
+     */
+    private static class TopoSorter<T> {
+        final Deque<T> result = new ArrayDeque<>();
+        final Graph<T> graph;
+
+        TopoSorter(Graph<T> graph) {
+            this.graph = graph;
+            sort();
+        }
+
+        public void ordered(Consumer<T> action) {
+            result.forEach(action);
+        }
+
+        public void reverse(Consumer<T> action) {
+            result.descendingIterator().forEachRemaining(action);
+        }
+
+        private void sort() {
+            Set<T> visited = new HashSet<>();
+            Deque<T> stack = new ArrayDeque<>();
+            graph.nodes.forEach(node -> visit(node, visited, stack));
+        }
+
+        private Set<T> children(T node) {
+            return graph.edges().get(node);
+        }
+
+        private void visit(T node, Set<T> visited, Deque<T> stack) {
+            if (visited.add(node)) {
+                stack.push(node);
+                children(node).forEach(child -> visit(child, visited, stack));
+                stack.pop();
+                result.addLast(node);
+            }
+            else if (stack.contains(node)) {
+                throw new IllegalArgumentException(
+                    "Cycle detected: " + node + " -> " + children(node));
+            }
+        }
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/module/ModuleInfo$Attributes.class b/tests/test_data/std/jdk/internal/module/ModuleInfo$Attributes.class
new file mode 100644
index 0000000000000000000000000000000000000000..236aa9eba66cadfe92c64df2414f8186ecc5a2e3
GIT binary patch
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diff --git a/tests/test_data/std/jdk/internal/module/ModuleInfo$ConstantPool$Entry.class b/tests/test_data/std/jdk/internal/module/ModuleInfo$ConstantPool$Entry.class
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diff --git a/tests/test_data/std/jdk/internal/module/ModuleInfo$ConstantPool$Index2Entry.class b/tests/test_data/std/jdk/internal/module/ModuleInfo$ConstantPool$Index2Entry.class
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diff --git a/tests/test_data/std/jdk/internal/module/ModuleInfo$ConstantPool$IndexEntry.class b/tests/test_data/std/jdk/internal/module/ModuleInfo$ConstantPool$IndexEntry.class
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z0hq`})ZJ?Fyc|eNpMC|Nop@e}=ZoShs7;WM#B<Y(ptuIlYw>;pTJrsCc)uR+tI(3~
kU&s56c;A4Qd_NDX-h{a>!1HE2FT(R1cwU0%H_7w=05?$w#Q*>R

literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/module/ModuleInfo.java b/tests/test_data/std/jdk/internal/module/ModuleInfo.java
new file mode 100644
index 00000000..26cb12f4
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/module/ModuleInfo.java
@@ -0,0 +1,1227 @@
+/*
+ * Copyright (c) 2014, 2022, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package jdk.internal.module;
+
+import java.io.DataInput;
+import java.io.DataInputStream;
+import java.io.EOFException;
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.UncheckedIOException;
+import java.lang.module.InvalidModuleDescriptorException;
+import java.lang.module.ModuleDescriptor;
+import java.lang.module.ModuleDescriptor.Builder;
+import java.lang.module.ModuleDescriptor.Requires;
+import java.lang.module.ModuleDescriptor.Exports;
+import java.lang.module.ModuleDescriptor.Opens;
+import java.nio.ByteBuffer;
+import java.nio.BufferUnderflowException;
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.HashSet;
+import java.util.List;
+import java.util.Map;
+import java.util.Set;
+import java.util.function.Supplier;
+
+import jdk.internal.access.JavaLangModuleAccess;
+import jdk.internal.access.SharedSecrets;
+import jdk.internal.misc.VM;
+
+import static jdk.internal.module.ClassFileConstants.*;
+
+
+/**
+ * Read module information from a {@code module-info} class file.
+ *
+ * @implNote The rationale for the hand-coded reader is startup performance
+ * and fine control over the throwing of InvalidModuleDescriptorException.
+ */
+
+public final class ModuleInfo {
+
+    private static final JavaLangModuleAccess JLMA
+        = SharedSecrets.getJavaLangModuleAccess();
+
+    // supplies the set of packages when ModulePackages attribute not present
+    private final Supplier<Set<String>> packageFinder;
+
+    // indicates if the ModuleHashes attribute should be parsed
+    private final boolean parseHashes;
+
+    private ModuleInfo(Supplier<Set<String>> pf, boolean ph) {
+        packageFinder = pf;
+        parseHashes = ph;
+    }
+
+    private ModuleInfo(Supplier<Set<String>> pf) {
+        this(pf, true);
+    }
+
+    /**
+     * A holder class for the ModuleDescriptor that is created by reading the
+     * Module and other standard class file attributes. It also holds the objects
+     * that represent the non-standard class file attributes that are read from
+     * the class file.
+     */
+    public static final class Attributes {
+        private final ModuleDescriptor descriptor;
+        private final ModuleTarget target;
+        private final ModuleHashes recordedHashes;
+        private final ModuleResolution moduleResolution;
+        Attributes(ModuleDescriptor descriptor,
+                   ModuleTarget target,
+                   ModuleHashes recordedHashes,
+                   ModuleResolution moduleResolution) {
+            this.descriptor = descriptor;
+            this.target = target;
+            this.recordedHashes = recordedHashes;
+            this.moduleResolution = moduleResolution;
+        }
+        public ModuleDescriptor descriptor() {
+            return descriptor;
+        }
+        public ModuleTarget target() {
+            return target;
+        }
+        public ModuleHashes recordedHashes() {
+            return recordedHashes;
+        }
+        public ModuleResolution moduleResolution() {
+            return moduleResolution;
+        }
+    }
+
+
+    /**
+     * Reads a {@code module-info.class} from the given input stream.
+     *
+     * @throws InvalidModuleDescriptorException
+     * @throws IOException
+     */
+    public static Attributes read(InputStream in, Supplier<Set<String>> pf)
+        throws IOException
+    {
+        try {
+            return new ModuleInfo(pf).doRead(new DataInputStream(in));
+        } catch (IllegalArgumentException | IllegalStateException e) {
+            throw invalidModuleDescriptor(e.getMessage());
+        } catch (EOFException x) {
+            throw truncatedModuleDescriptor();
+        }
+    }
+
+    /**
+     * Reads a {@code module-info.class} from the given byte buffer.
+     *
+     * @throws InvalidModuleDescriptorException
+     * @throws UncheckedIOException
+     */
+    public static Attributes read(ByteBuffer bb, Supplier<Set<String>> pf) {
+        try {
+            return new ModuleInfo(pf).doRead(new DataInputWrapper(bb));
+        } catch (IllegalArgumentException | IllegalStateException e) {
+            throw invalidModuleDescriptor(e.getMessage());
+        } catch (EOFException x) {
+            throw truncatedModuleDescriptor();
+        } catch (IOException ioe) {
+            throw new UncheckedIOException(ioe);
+        }
+    }
+
+    /**
+     * Reads a {@code module-info.class} from the given byte buffer
+     * but ignore the {@code ModuleHashes} attribute.
+     *
+     * @throws InvalidModuleDescriptorException
+     * @throws UncheckedIOException
+     */
+    public static Attributes readIgnoringHashes(ByteBuffer bb, Supplier<Set<String>> pf) {
+        try {
+            return new ModuleInfo(pf, false).doRead(new DataInputWrapper(bb));
+        } catch (IllegalArgumentException | IllegalStateException e) {
+            throw invalidModuleDescriptor(e.getMessage());
+        } catch (EOFException x) {
+            throw truncatedModuleDescriptor();
+        } catch (IOException ioe) {
+            throw new UncheckedIOException(ioe);
+        }
+    }
+
+    /**
+     * Reads the input as a module-info class file.
+     *
+     * @throws IOException
+     * @throws InvalidModuleDescriptorException
+     * @throws IllegalArgumentException if thrown by the ModuleDescriptor.Builder
+     *         because an identifier is not a legal Java identifier, duplicate
+     *         exports, and many other reasons
+     */
+    private Attributes doRead(DataInput input) throws IOException {
+        var in = new CountingDataInput(input);
+
+        int magic = in.readInt();
+        if (magic != 0xCAFEBABE)
+            throw invalidModuleDescriptor("Bad magic number");
+
+        int minor_version = in.readUnsignedShort();
+        int major_version = in.readUnsignedShort();
+        if (!VM.isSupportedModuleDescriptorVersion(major_version, minor_version)) {
+            throw invalidModuleDescriptor("Unsupported major.minor version "
+                                          + major_version + "." + minor_version);
+        }
+
+        ConstantPool cpool = new ConstantPool(in);
+
+        int access_flags = in.readUnsignedShort();
+        if (access_flags != ACC_MODULE)
+            throw invalidModuleDescriptor("access_flags should be ACC_MODULE");
+
+        int this_class = in.readUnsignedShort();
+        String mn = cpool.getClassName(this_class);
+        if (!"module-info".equals(mn))
+            throw invalidModuleDescriptor("this_class should be module-info");
+
+        int super_class = in.readUnsignedShort();
+        if (super_class > 0)
+            throw invalidModuleDescriptor("bad #super_class");
+
+        int interfaces_count = in.readUnsignedShort();
+        if (interfaces_count > 0)
+            throw invalidModuleDescriptor("Bad #interfaces");
+
+        int fields_count = in.readUnsignedShort();
+        if (fields_count > 0)
+            throw invalidModuleDescriptor("Bad #fields");
+
+        int methods_count = in.readUnsignedShort();
+        if (methods_count > 0)
+            throw invalidModuleDescriptor("Bad #methods");
+
+        int attributes_count = in.readUnsignedShort();
+
+        // the names of the attributes found in the class file
+        Set<String> attributes = new HashSet<>();
+
+        Builder builder = null;
+        Set<String> allPackages = null;
+        String mainClass = null;
+        ModuleTarget moduleTarget = null;
+        ModuleHashes moduleHashes = null;
+        ModuleResolution moduleResolution = null;
+
+        for (int i = 0; i < attributes_count ; i++) {
+            int name_index = in.readUnsignedShort();
+            String attribute_name = cpool.getUtf8(name_index);
+            int length = in.readInt();
+
+            boolean added = attributes.add(attribute_name);
+            if (!added && isAttributeAtMostOnce(attribute_name)) {
+                throw invalidModuleDescriptor("More than one "
+                                              + attribute_name + " attribute");
+            }
+
+            long initialPosition = in.count();
+
+            switch (attribute_name) {
+                case MODULE :
+                    builder = readModuleAttribute(in, cpool, major_version);
+                    break;
+
+                case MODULE_PACKAGES :
+                    allPackages = readModulePackagesAttribute(in, cpool);
+                    break;
+
+                case MODULE_MAIN_CLASS :
+                    mainClass = readModuleMainClassAttribute(in, cpool);
+                    break;
+
+                case MODULE_TARGET :
+                    moduleTarget = readModuleTargetAttribute(in, cpool);
+                    break;
+
+                case MODULE_HASHES :
+                    if (parseHashes) {
+                        moduleHashes = readModuleHashesAttribute(in, cpool);
+                    } else {
+                        in.skipBytes(length);
+                    }
+                    break;
+
+                case MODULE_RESOLUTION :
+                    moduleResolution = readModuleResolution(in, cpool);
+                    break;
+
+                default:
+                    if (isAttributeDisallowed(attribute_name)) {
+                        throw invalidModuleDescriptor(attribute_name
+                                                      + " attribute not allowed");
+                    } else {
+                        in.skipBytes(length);
+                    }
+            }
+
+            long newPosition = in.count();
+            if ((newPosition - initialPosition) != length) {
+                // attribute length does not match actual attribute size
+                throw invalidModuleDescriptor("Attribute " + attribute_name
+                        + " does not match its expected length");
+            }
+
+        }
+
+        // the Module attribute is required
+        if (builder == null) {
+            throw invalidModuleDescriptor(MODULE + " attribute not found");
+        }
+
+        // ModuleMainClass  attribute
+        if (mainClass != null) {
+            builder.mainClass(mainClass);
+        }
+
+        // If the ModulePackages attribute is not present then the packageFinder
+        // is used to find the set of packages
+        boolean usedPackageFinder = false;
+        if (allPackages == null && packageFinder != null) {
+            try {
+                allPackages = packageFinder.get();
+            } catch (UncheckedIOException x) {
+                throw x.getCause();
+            }
+            usedPackageFinder = true;
+        }
+        if (allPackages != null) {
+            Set<String> knownPackages = JLMA.packages(builder);
+            if (!allPackages.containsAll(knownPackages)) {
+                Set<String> missingPackages = new HashSet<>(knownPackages);
+                missingPackages.removeAll(allPackages);
+                assert !missingPackages.isEmpty();
+                String missingPackage = missingPackages.iterator().next();
+                String tail;
+                if (usedPackageFinder) {
+                    tail = " not found in module";
+                } else {
+                    tail = " missing from ModulePackages class file attribute";
+                }
+                throw invalidModuleDescriptor("Package " + missingPackage + tail);
+
+            }
+            builder.packages(allPackages);
+        }
+
+        ModuleDescriptor descriptor = builder.build();
+        return new Attributes(descriptor,
+                              moduleTarget,
+                              moduleHashes,
+                              moduleResolution);
+    }
+
+    /**
+     * Reads the Module attribute, returning the ModuleDescriptor.Builder to
+     * build the corresponding ModuleDescriptor.
+     */
+    private Builder readModuleAttribute(DataInput in, ConstantPool cpool, int major)
+        throws IOException
+    {
+        // module_name
+        int module_name_index = in.readUnsignedShort();
+        String mn = cpool.getModuleName(module_name_index);
+
+        int module_flags = in.readUnsignedShort();
+
+        Set<ModuleDescriptor.Modifier> modifiers = new HashSet<>();
+        boolean open = ((module_flags & ACC_OPEN) != 0);
+        if (open)
+            modifiers.add(ModuleDescriptor.Modifier.OPEN);
+        if ((module_flags & ACC_SYNTHETIC) != 0)
+            modifiers.add(ModuleDescriptor.Modifier.SYNTHETIC);
+        if ((module_flags & ACC_MANDATED) != 0)
+            modifiers.add(ModuleDescriptor.Modifier.MANDATED);
+
+        Builder builder = JLMA.newModuleBuilder(mn, false, modifiers);
+
+        int module_version_index = in.readUnsignedShort();
+        if (module_version_index != 0) {
+            String vs = cpool.getUtf8(module_version_index);
+            builder.version(vs);
+        }
+
+        int requires_count = in.readUnsignedShort();
+        boolean requiresJavaBase = false;
+        for (int i=0; i<requires_count; i++) {
+            int requires_index = in.readUnsignedShort();
+            String dn = cpool.getModuleName(requires_index);
+
+            int requires_flags = in.readUnsignedShort();
+            Set<Requires.Modifier> mods;
+            if (requires_flags == 0) {
+                mods = Set.of();
+            } else {
+                mods = new HashSet<>();
+                if ((requires_flags & ACC_TRANSITIVE) != 0)
+                    mods.add(Requires.Modifier.TRANSITIVE);
+                if ((requires_flags & ACC_STATIC_PHASE) != 0)
+                    mods.add(Requires.Modifier.STATIC);
+                if ((requires_flags & ACC_SYNTHETIC) != 0)
+                    mods.add(Requires.Modifier.SYNTHETIC);
+                if ((requires_flags & ACC_MANDATED) != 0)
+                    mods.add(Requires.Modifier.MANDATED);
+            }
+
+            int requires_version_index = in.readUnsignedShort();
+            if (requires_version_index == 0) {
+                builder.requires(mods, dn);
+            } else {
+                String vs = cpool.getUtf8(requires_version_index);
+                JLMA.requires(builder, mods, dn, vs);
+            }
+
+            if (dn.equals("java.base")) {
+                if (mods.contains(Requires.Modifier.SYNTHETIC)) {
+                    throw invalidModuleDescriptor("The requires entry for java.base"
+                                                  + " has ACC_SYNTHETIC set");
+                }
+                if (major >= 54
+                    && (mods.contains(Requires.Modifier.TRANSITIVE)
+                        || mods.contains(Requires.Modifier.STATIC))) {
+                    String flagName;
+                    if (mods.contains(Requires.Modifier.TRANSITIVE)) {
+                        flagName = "ACC_TRANSITIVE";
+                    } else {
+                        flagName = "ACC_STATIC_PHASE";
+                    }
+                    throw invalidModuleDescriptor("The requires entry for java.base"
+                                                  + " has " + flagName + " set");
+                }
+                requiresJavaBase = true;
+            }
+        }
+        if (mn.equals("java.base")) {
+            if (requires_count > 0) {
+                throw invalidModuleDescriptor("The requires table for java.base"
+                                              + " must be 0 length");
+            }
+        } else if (!requiresJavaBase) {
+            throw invalidModuleDescriptor("The requires table must have"
+                                          + " an entry for java.base");
+        }
+
+        int exports_count = in.readUnsignedShort();
+        if (exports_count > 0) {
+            for (int i=0; i<exports_count; i++) {
+                int exports_index = in.readUnsignedShort();
+                String pkg = cpool.getPackageName(exports_index);
+
+                Set<Exports.Modifier> mods;
+                int exports_flags = in.readUnsignedShort();
+                if (exports_flags == 0) {
+                    mods = Set.of();
+                } else {
+                    mods = new HashSet<>();
+                    if ((exports_flags & ACC_SYNTHETIC) != 0)
+                        mods.add(Exports.Modifier.SYNTHETIC);
+                    if ((exports_flags & ACC_MANDATED) != 0)
+                        mods.add(Exports.Modifier.MANDATED);
+                }
+
+                int exports_to_count = in.readUnsignedShort();
+                if (exports_to_count > 0) {
+                    Set<String> targets = HashSet.newHashSet(exports_to_count);
+                    for (int j=0; j<exports_to_count; j++) {
+                        int exports_to_index = in.readUnsignedShort();
+                        String target = cpool.getModuleName(exports_to_index);
+                        if (!targets.add(target)) {
+                            throw invalidModuleDescriptor(pkg + " exported to "
+                                                          + target + " more than once");
+                        }
+                    }
+                    builder.exports(mods, pkg, targets);
+                } else {
+                    builder.exports(mods, pkg);
+                }
+            }
+        }
+
+        int opens_count = in.readUnsignedShort();
+        if (opens_count > 0) {
+            if (open) {
+                throw invalidModuleDescriptor("The opens table for an open"
+                                              + " module must be 0 length");
+            }
+            for (int i=0; i<opens_count; i++) {
+                int opens_index = in.readUnsignedShort();
+                String pkg = cpool.getPackageName(opens_index);
+
+                Set<Opens.Modifier> mods;
+                int opens_flags = in.readUnsignedShort();
+                if (opens_flags == 0) {
+                    mods = Set.of();
+                } else {
+                    mods = new HashSet<>();
+                    if ((opens_flags & ACC_SYNTHETIC) != 0)
+                        mods.add(Opens.Modifier.SYNTHETIC);
+                    if ((opens_flags & ACC_MANDATED) != 0)
+                        mods.add(Opens.Modifier.MANDATED);
+                }
+
+                int open_to_count = in.readUnsignedShort();
+                if (open_to_count > 0) {
+                    Set<String> targets = HashSet.newHashSet(open_to_count);
+                    for (int j=0; j<open_to_count; j++) {
+                        int opens_to_index = in.readUnsignedShort();
+                        String target = cpool.getModuleName(opens_to_index);
+                        if (!targets.add(target)) {
+                            throw invalidModuleDescriptor(pkg + " opened to "
+                                                          + target + " more than once");
+                        }
+                    }
+                    builder.opens(mods, pkg, targets);
+                } else {
+                    builder.opens(mods, pkg);
+                }
+            }
+        }
+
+        int uses_count = in.readUnsignedShort();
+        if (uses_count > 0) {
+            for (int i=0; i<uses_count; i++) {
+                int index = in.readUnsignedShort();
+                String sn = cpool.getClassName(index);
+                builder.uses(sn);
+            }
+        }
+
+        int provides_count = in.readUnsignedShort();
+        if (provides_count > 0) {
+            for (int i=0; i<provides_count; i++) {
+                int index = in.readUnsignedShort();
+                String sn = cpool.getClassName(index);
+                int with_count = in.readUnsignedShort();
+                List<String> providers = new ArrayList<>(with_count);
+                for (int j=0; j<with_count; j++) {
+                    index = in.readUnsignedShort();
+                    String pn = cpool.getClassName(index);
+                    if (!providers.add(pn)) {
+                        throw invalidModuleDescriptor(sn + " provides " + pn
+                                                      + " more than once");
+                    }
+                }
+                builder.provides(sn, providers);
+            }
+        }
+
+        return builder;
+    }
+
+    /**
+     * Reads the ModulePackages attribute
+     */
+    private Set<String> readModulePackagesAttribute(DataInput in, ConstantPool cpool)
+        throws IOException
+    {
+        int package_count = in.readUnsignedShort();
+        Set<String> packages = HashSet.newHashSet(package_count);
+        for (int i=0; i<package_count; i++) {
+            int index = in.readUnsignedShort();
+            String pn = cpool.getPackageName(index);
+            boolean added = packages.add(pn);
+            if (!added) {
+                throw invalidModuleDescriptor("Package " + pn + " in ModulePackages"
+                                              + "attribute more than once");
+            }
+        }
+        return packages;
+    }
+
+    /**
+     * Reads the ModuleMainClass attribute
+     */
+    private String readModuleMainClassAttribute(DataInput in, ConstantPool cpool)
+        throws IOException
+    {
+        int index = in.readUnsignedShort();
+        return cpool.getClassName(index);
+    }
+
+    /**
+     * Reads the ModuleTarget attribute
+     */
+    private ModuleTarget readModuleTargetAttribute(DataInput in, ConstantPool cpool)
+        throws IOException
+    {
+        String targetPlatform = null;
+
+        int index = in.readUnsignedShort();
+        if (index != 0)
+            targetPlatform = cpool.getUtf8(index);
+
+        return new ModuleTarget(targetPlatform);
+    }
+
+    /**
+     * Reads the ModuleHashes attribute
+     */
+    private ModuleHashes readModuleHashesAttribute(DataInput in, ConstantPool cpool)
+        throws IOException
+    {
+        int algorithm_index = in.readUnsignedShort();
+        String algorithm = cpool.getUtf8(algorithm_index);
+
+        int hash_count = in.readUnsignedShort();
+        Map<String, byte[]> map = HashMap.newHashMap(hash_count);
+        for (int i=0; i<hash_count; i++) {
+            int module_name_index = in.readUnsignedShort();
+            String mn = cpool.getModuleName(module_name_index);
+            int hash_length = in.readUnsignedShort();
+            if (hash_length == 0) {
+                throw invalidModuleDescriptor("hash_length == 0");
+            }
+            byte[] hash = new byte[hash_length];
+            in.readFully(hash);
+            map.put(mn, hash);
+        }
+
+        return new ModuleHashes(algorithm, map);
+    }
+
+    /**
+     * Reads the ModuleResolution attribute.
+     */
+    private ModuleResolution readModuleResolution(DataInput in,
+                                                  ConstantPool cpool)
+        throws IOException
+    {
+        int flags = in.readUnsignedShort();
+
+        int reason = 0;
+        if ((flags & WARN_DEPRECATED) != 0)
+            reason = WARN_DEPRECATED;
+        if ((flags & WARN_DEPRECATED_FOR_REMOVAL) != 0) {
+            if (reason != 0)
+                throw invalidModuleDescriptor("Bad module resolution flags:" + flags);
+            reason = WARN_DEPRECATED_FOR_REMOVAL;
+        }
+        if ((flags & WARN_INCUBATING) != 0) {
+            if (reason != 0)
+                throw invalidModuleDescriptor("Bad module resolution flags:" + flags);
+        }
+
+        return new ModuleResolution(flags);
+    }
+
+    /**
+     * Returns true if the given attribute can be present at most once
+     * in the class file. Returns false otherwise.
+     */
+    private static boolean isAttributeAtMostOnce(String name) {
+
+        if (name.equals(MODULE) ||
+                name.equals(SOURCE_FILE) ||
+                name.equals(SDE) ||
+                name.equals(MODULE_PACKAGES) ||
+                name.equals(MODULE_MAIN_CLASS) ||
+                name.equals(MODULE_TARGET) ||
+                name.equals(MODULE_HASHES) ||
+                name.equals(MODULE_RESOLUTION))
+            return true;
+
+        return false;
+    }
+
+    /**
+     * Return true if the given attribute name is the name of a pre-defined
+     * attribute in JVMS 4.7 that is not allowed in a module-info class.
+     */
+    private static boolean isAttributeDisallowed(String name) {
+        Set<String> notAllowed = predefinedNotAllowed;
+        if (notAllowed == null) {
+            notAllowed = Set.of(
+                    "ConstantValue",
+                    "Code",
+                    "Deprecated",
+                    "StackMapTable",
+                    "Exceptions",
+                    "EnclosingMethod",
+                    "Signature",
+                    "LineNumberTable",
+                    "LocalVariableTable",
+                    "LocalVariableTypeTable",
+                    "RuntimeVisibleParameterAnnotations",
+                    "RuntimeInvisibleParameterAnnotations",
+                    "RuntimeVisibleTypeAnnotations",
+                    "RuntimeInvisibleTypeAnnotations",
+                    "Synthetic",
+                    "AnnotationDefault",
+                    "BootstrapMethods",
+                    "MethodParameters");
+            predefinedNotAllowed = notAllowed;
+        }
+        return notAllowed.contains(name);
+    }
+
+    // lazily created set the pre-defined attributes that are not allowed
+    private static volatile Set<String> predefinedNotAllowed;
+
+
+    /**
+     * The constant pool in a class file.
+     */
+    private static class ConstantPool {
+        static final int CONSTANT_Utf8 = 1;
+        static final int CONSTANT_Integer = 3;
+        static final int CONSTANT_Float = 4;
+        static final int CONSTANT_Long = 5;
+        static final int CONSTANT_Double = 6;
+        static final int CONSTANT_Class = 7;
+        static final int CONSTANT_String = 8;
+        static final int CONSTANT_Fieldref = 9;
+        static final int CONSTANT_Methodref = 10;
+        static final int CONSTANT_InterfaceMethodref = 11;
+        static final int CONSTANT_NameAndType = 12;
+        static final int CONSTANT_MethodHandle = 15;
+        static final int CONSTANT_MethodType = 16;
+        static final int CONSTANT_InvokeDynamic = 18;
+        static final int CONSTANT_Module = 19;
+        static final int CONSTANT_Package = 20;
+
+        private static class Entry {
+            protected Entry(int tag) {
+                this.tag = tag;
+            }
+            final int tag;
+        }
+
+        private static class IndexEntry extends Entry {
+            IndexEntry(int tag, int index) {
+                super(tag);
+                this.index = index;
+            }
+            final int index;
+        }
+
+        private static class Index2Entry extends Entry {
+            Index2Entry(int tag, int index1, int index2) {
+                super(tag);
+                this.index1 = index1;
+                this.index2 = index2;
+            }
+            final int index1,  index2;
+        }
+
+        private static class ValueEntry extends Entry {
+            ValueEntry(int tag, Object value) {
+                super(tag);
+                this.value = value;
+            }
+            final Object value;
+        }
+
+        final Entry[] pool;
+
+        ConstantPool(DataInput in) throws IOException {
+            int count = in.readUnsignedShort();
+            pool = new Entry[count];
+
+            for (int i = 1; i < count; i++) {
+                int tag = in.readUnsignedByte();
+                switch (tag) {
+
+                    case CONSTANT_Utf8:
+                        String svalue = in.readUTF();
+                        pool[i] = new ValueEntry(tag, svalue);
+                        break;
+
+                    case CONSTANT_Class:
+                    case CONSTANT_Package:
+                    case CONSTANT_Module:
+                    case CONSTANT_String:
+                        int index = in.readUnsignedShort();
+                        pool[i] = new IndexEntry(tag, index);
+                        break;
+
+                    case CONSTANT_Double:
+                        double dvalue = in.readDouble();
+                        pool[i] = new ValueEntry(tag, dvalue);
+                        i++;
+                        break;
+
+                    case CONSTANT_Fieldref:
+                    case CONSTANT_InterfaceMethodref:
+                    case CONSTANT_Methodref:
+                    case CONSTANT_InvokeDynamic:
+                    case CONSTANT_NameAndType:
+                        int index1 = in.readUnsignedShort();
+                        int index2 = in.readUnsignedShort();
+                        pool[i] = new Index2Entry(tag, index1, index2);
+                        break;
+
+                    case CONSTANT_MethodHandle:
+                        int refKind = in.readUnsignedByte();
+                        index = in.readUnsignedShort();
+                        pool[i] = new Index2Entry(tag, refKind, index);
+                        break;
+
+                    case CONSTANT_MethodType:
+                        index = in.readUnsignedShort();
+                        pool[i] = new IndexEntry(tag, index);
+                        break;
+
+                    case CONSTANT_Float:
+                        float fvalue = in.readFloat();
+                        pool[i] = new ValueEntry(tag, fvalue);
+                        break;
+
+                    case CONSTANT_Integer:
+                        int ivalue = in.readInt();
+                        pool[i] = new ValueEntry(tag, ivalue);
+                        break;
+
+                    case CONSTANT_Long:
+                        long lvalue = in.readLong();
+                        pool[i] = new ValueEntry(tag, lvalue);
+                        i++;
+                        break;
+
+                    default:
+                        throw invalidModuleDescriptor("Bad constant pool entry: "
+                                                      + i);
+                }
+            }
+        }
+
+        String getClassName(int index) {
+            checkIndex(index);
+            Entry e = pool[index];
+            if (e.tag != CONSTANT_Class) {
+                throw invalidModuleDescriptor("CONSTANT_Class expected at entry: "
+                                              + index);
+            }
+            String value = getUtf8(((IndexEntry) e).index);
+            checkUnqualifiedName("CONSTANT_Class", index, value);
+            return value.replace('/', '.');  // internal form -> binary name
+        }
+
+        String getPackageName(int index) {
+            checkIndex(index);
+            Entry e = pool[index];
+            if (e.tag != CONSTANT_Package) {
+                throw invalidModuleDescriptor("CONSTANT_Package expected at entry: "
+                                              + index);
+            }
+            String value = getUtf8(((IndexEntry) e).index);
+            checkUnqualifiedName("CONSTANT_Package", index, value);
+            return value.replace('/', '.');  // internal form -> binary name
+        }
+
+        String getModuleName(int index) {
+            checkIndex(index);
+            Entry e = pool[index];
+            if (e.tag != CONSTANT_Module) {
+                throw invalidModuleDescriptor("CONSTANT_Module expected at entry: "
+                                              + index);
+            }
+            String value = getUtf8(((IndexEntry) e).index);
+            return decodeModuleName(index, value);
+        }
+
+        String getUtf8(int index) {
+            checkIndex(index);
+            Entry e = pool[index];
+            if (e.tag != CONSTANT_Utf8) {
+                throw invalidModuleDescriptor("CONSTANT_Utf8 expected at entry: "
+                                              + index);
+            }
+            return (String) (((ValueEntry) e).value);
+        }
+
+        void checkIndex(int index) {
+            if (index < 1 || index >= pool.length)
+                throw invalidModuleDescriptor("Index into constant pool out of range");
+        }
+
+        void checkUnqualifiedName(String what, int index, String value) {
+            int len = value.length();
+            if (len == 0) {
+                throw invalidModuleDescriptor(what + " at entry " + index
+                                              + " has zero length");
+            }
+            for (int i=0; i<len; i++) {
+                char c = value.charAt(i);
+                if (c == '.' || c == ';' || c == '[') {
+                    throw invalidModuleDescriptor(what + " at entry " + index
+                                                  + " has illegal character: '"
+                                                  + c + "'");
+                }
+            }
+        }
+
+        /**
+         * "Decode" a module name that has been read from the constant pool.
+         */
+        String decodeModuleName(int index, String value) {
+            int len = value.length();
+            if (len == 0) {
+                throw invalidModuleDescriptor("CONSTANT_Module at entry "
+                                              + index + " is zero length");
+            }
+            int i = 0;
+            while (i < len) {
+                int cp = value.codePointAt(i);
+                if (cp == ':' || cp == '@' || cp < 0x20) {
+                    throw invalidModuleDescriptor("CONSTANT_Module at entry "
+                                                  + index + " has illegal character: "
+                                                  + Character.getName(cp));
+                }
+
+                // blackslash is the escape character
+                if (cp == '\\')
+                    return decodeModuleName(index, i, value);
+
+                i += Character.charCount(cp);
+            }
+            return value;
+        }
+
+        /**
+         * "Decode" a module name that has been read from the constant pool and
+         * partly checked for illegal characters (up to position {@code i}).
+         */
+        String decodeModuleName(int index, int i, String value) {
+            StringBuilder sb = new StringBuilder();
+
+            // copy the code points that have been checked
+            int j = 0;
+            while (j < i) {
+                int cp = value.codePointAt(j);
+                sb.appendCodePoint(cp);
+                j += Character.charCount(cp);
+            }
+
+            // decode from position {@code i} to end
+            int len = value.length();
+            while (i < len) {
+                int cp = value.codePointAt(i);
+                if (cp == ':' || cp == '@' || cp < 0x20) {
+                    throw invalidModuleDescriptor("CONSTANT_Module at entry "
+                                                  + index + " has illegal character: "
+                                                  + Character.getName(cp));
+                }
+
+                // blackslash is the escape character
+                if (cp == '\\') {
+                    j = i + Character.charCount(cp);
+                    if (j >= len) {
+                        throw invalidModuleDescriptor("CONSTANT_Module at entry "
+                                                       + index + " has illegal "
+                                                       + "escape sequence");
+                    }
+                    int next = value.codePointAt(j);
+                    if (next != '\\' && next != ':' && next != '@') {
+                        throw invalidModuleDescriptor("CONSTANT_Module at entry "
+                                                      + index + " has illegal "
+                                                      + "escape sequence");
+                    }
+                    sb.appendCodePoint(next);
+                    i += Character.charCount(next);
+                } else {
+                    sb.appendCodePoint(cp);
+                }
+
+                i += Character.charCount(cp);
+            }
+            return sb.toString();
+        }
+    }
+
+    /**
+     * A DataInput implementation that reads from a ByteBuffer.
+     */
+    private static class DataInputWrapper implements DataInput {
+        private final ByteBuffer bb;
+
+        DataInputWrapper(ByteBuffer bb) {
+            this.bb = bb;
+        }
+
+        @Override
+        public void readFully(byte b[]) throws IOException {
+            readFully(b, 0, b.length);
+        }
+
+        @Override
+        public void readFully(byte b[], int off, int len) throws IOException {
+            try {
+                bb.get(b, off, len);
+            } catch (BufferUnderflowException e) {
+                throw new EOFException(e.getMessage());
+            }
+        }
+
+        @Override
+        public int skipBytes(int n) {
+            int skip = Math.min(n, bb.remaining());
+            bb.position(bb.position() + skip);
+            return skip;
+        }
+
+        @Override
+        public boolean readBoolean() throws IOException {
+            try {
+                int ch = bb.get();
+                return (ch != 0);
+            } catch (BufferUnderflowException e) {
+                throw new EOFException(e.getMessage());
+            }
+        }
+
+        @Override
+        public byte readByte() throws IOException {
+            try {
+                return bb.get();
+            } catch (BufferUnderflowException e) {
+                throw new EOFException(e.getMessage());
+            }
+        }
+
+        @Override
+        public int readUnsignedByte() throws IOException {
+            try {
+                return ((int) bb.get()) & 0xff;
+            } catch (BufferUnderflowException e) {
+                throw new EOFException(e.getMessage());
+            }
+        }
+
+        @Override
+        public short readShort() throws IOException {
+            try {
+                return bb.getShort();
+            } catch (BufferUnderflowException e) {
+                throw new EOFException(e.getMessage());
+            }
+        }
+
+        @Override
+        public int readUnsignedShort() throws IOException {
+            try {
+                return ((int) bb.getShort()) & 0xffff;
+            } catch (BufferUnderflowException e) {
+                throw new EOFException(e.getMessage());
+            }
+        }
+
+        @Override
+        public char readChar() throws IOException {
+            try {
+                return bb.getChar();
+            } catch (BufferUnderflowException e) {
+                throw new EOFException(e.getMessage());
+            }
+        }
+
+        @Override
+        public int readInt() throws IOException {
+            try {
+                return bb.getInt();
+            } catch (BufferUnderflowException e) {
+                throw new EOFException(e.getMessage());
+            }
+        }
+
+        @Override
+        public long readLong() throws IOException {
+            try {
+                return bb.getLong();
+            } catch (BufferUnderflowException e) {
+                throw new EOFException(e.getMessage());
+            }
+        }
+
+        @Override
+        public float readFloat() throws IOException {
+            try {
+                return bb.getFloat();
+            } catch (BufferUnderflowException e) {
+                throw new EOFException(e.getMessage());
+            }
+        }
+
+        @Override
+        public double readDouble() throws IOException {
+            try {
+                return bb.getDouble();
+            } catch (BufferUnderflowException e) {
+                throw new EOFException(e.getMessage());
+            }
+        }
+
+        @Override
+        public String readLine() {
+            throw new RuntimeException("not implemented");
+        }
+
+        @Override
+        public String readUTF() throws IOException {
+            // ### Need to measure the performance and feasibility of using
+            // the UTF-8 decoder instead.
+            return DataInputStream.readUTF(this);
+        }
+    }
+
+    /**
+     * A DataInput implementation that reads from another DataInput and counts
+     * the number of bytes read.
+     */
+    private static class CountingDataInput implements DataInput {
+        private final DataInput delegate;
+        private long count;
+
+        CountingDataInput(DataInput delegate) {
+            this.delegate = delegate;
+        }
+
+        long count() {
+            return count;
+        }
+
+        @Override
+        public void readFully(byte b[]) throws IOException {
+            delegate.readFully(b, 0, b.length);
+            count += b.length;
+        }
+
+        @Override
+        public void readFully(byte b[], int off, int len) throws IOException {
+            delegate.readFully(b, off, len);
+            count += len;
+        }
+
+        @Override
+        public int skipBytes(int n) throws IOException {
+            int skip = delegate.skipBytes(n);
+            count += skip;
+            return skip;
+        }
+
+        @Override
+        public boolean readBoolean() throws IOException {
+            boolean b = delegate.readBoolean();
+            count++;
+            return b;
+        }
+
+        @Override
+        public byte readByte() throws IOException {
+            byte b = delegate.readByte();
+            count++;
+            return b;
+        }
+
+        @Override
+        public int readUnsignedByte() throws IOException {
+            int i = delegate.readUnsignedByte();
+            count++;
+            return i;
+        }
+
+        @Override
+        public short readShort() throws IOException {
+            short s = delegate.readShort();
+            count += 2;
+            return s;
+        }
+
+        @Override
+        public int readUnsignedShort() throws IOException {
+            int s = delegate.readUnsignedShort();
+            count += 2;
+            return s;
+        }
+
+        @Override
+        public char readChar() throws IOException {
+            char c = delegate.readChar();
+            count += 2;
+            return c;
+        }
+
+        @Override
+        public int readInt() throws IOException {
+            int i = delegate.readInt();
+            count += 4;
+            return i;
+        }
+
+        @Override
+        public long readLong() throws IOException {
+            long l = delegate.readLong();
+            count += 8;
+            return l;
+        }
+
+        @Override
+        public float readFloat() throws IOException {
+            float f = delegate.readFloat();
+            count += 4;
+            return f;
+        }
+
+        @Override
+        public double readDouble() throws IOException {
+            double d = delegate.readDouble();
+            count += 8;
+            return d;
+        }
+
+        @Override
+        public String readLine() {
+            throw new RuntimeException("not implemented");
+        }
+
+        @Override
+        public String readUTF() throws IOException {
+            return DataInputStream.readUTF(this);
+        }
+    }
+
+    /**
+     * Returns an InvalidModuleDescriptorException with the given detail
+     * message
+     */
+    private static InvalidModuleDescriptorException invalidModuleDescriptor(String msg) {
+        return new InvalidModuleDescriptorException(msg);
+    }
+
+    /**
+     * Returns an InvalidModuleDescriptorException with a detail message to
+     * indicate that the class file is truncated.
+     */
+    private static InvalidModuleDescriptorException truncatedModuleDescriptor() {
+        return invalidModuleDescriptor("Truncated module-info.class");
+    }
+
+}
diff --git a/tests/test_data/std/jdk/internal/module/ModuleInfoExtender.class b/tests/test_data/std/jdk/internal/module/ModuleInfoExtender.class
new file mode 100644
index 0000000000000000000000000000000000000000..c01cff7c1f24acb50106bcb614b441379810c10f
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HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/module/ModuleInfoExtender.java b/tests/test_data/std/jdk/internal/module/ModuleInfoExtender.java
new file mode 100644
index 00000000..c9d3fd0a
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/module/ModuleInfoExtender.java
@@ -0,0 +1,212 @@
+/*
+ * Copyright (c) 2014, 2020, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package jdk.internal.module;
+
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.OutputStream;
+import java.lang.constant.ClassDesc;
+import java.lang.module.ModuleDescriptor.Version;
+import java.util.Collections;
+import java.util.List;
+import java.util.Set;
+import java.lang.classfile.ClassFile;
+import java.lang.classfile.ClassTransform;
+import java.lang.classfile.attribute.ModuleAttribute;
+import java.lang.classfile.attribute.ModuleHashInfo;
+import java.lang.classfile.attribute.ModuleHashesAttribute;
+import java.lang.classfile.attribute.ModuleMainClassAttribute;
+import java.lang.classfile.attribute.ModulePackagesAttribute;
+import java.lang.classfile.attribute.ModuleResolutionAttribute;
+import java.lang.classfile.attribute.ModuleTargetAttribute;
+import java.lang.constant.ModuleDesc;
+import java.lang.constant.PackageDesc;
+
+
+/**
+ * Utility class to extend a module-info.class with additional attributes.
+ */
+
+public final class ModuleInfoExtender {
+
+    // the input stream to read the original module-info.class
+    private final InputStream in;
+
+    // the packages in the ModulePackages attribute
+    private Set<String> packages;
+
+    // the value for the module version in the Module attribute
+    private Version version;
+
+    // the value of the ModuleMainClass attribute
+    private String mainClass;
+
+    // the value for the ModuleTarget attribute
+    private String targetPlatform;
+
+    // the hashes for the ModuleHashes attribute
+    private ModuleHashes hashes;
+
+    // the value of the ModuleResolution attribute
+    private ModuleResolution moduleResolution;
+
+    private ModuleInfoExtender(InputStream in) {
+        this.in = in;
+    }
+
+    /**
+     * Sets the packages for the ModulePackages attribute
+     *
+     * @apiNote This method does not check that the package names are legal
+     * package names or that the set of packages is a super set of the
+     * packages in the module.
+     */
+    public ModuleInfoExtender packages(Set<String> packages) {
+        this.packages = Collections.unmodifiableSet(packages);
+        return this;
+    }
+
+    /**
+     * Sets the value for the module version in the Module attribute
+     */
+    public ModuleInfoExtender version(Version version) {
+        this.version = version;
+        return this;
+    }
+
+    /**
+     * Sets the value of the ModuleMainClass attribute.
+     *
+     * @apiNote This method does not check that the main class is a legal
+     * class name in a named package.
+     */
+    public ModuleInfoExtender mainClass(String mainClass) {
+        this.mainClass = mainClass;
+        return this;
+    }
+
+    /**
+     * Sets the value for the ModuleTarget attribute.
+     */
+    public ModuleInfoExtender targetPlatform(String targetPlatform) {
+        this.targetPlatform = targetPlatform;
+        return this;
+    }
+
+    /**
+     * The ModuleHashes attribute will be emitted to the module-info with
+     * the hashes encapsulated in the given {@code ModuleHashes}
+     * object.
+     */
+    public ModuleInfoExtender hashes(ModuleHashes hashes) {
+        this.hashes = hashes;
+        return this;
+    }
+
+    /**
+     * Sets the value for the ModuleResolution attribute.
+     */
+    public ModuleInfoExtender moduleResolution(ModuleResolution mres) {
+        this.moduleResolution = mres;
+        return this;
+    }
+
+    /**
+     * Outputs the modified module-info.class to the given output stream.
+     * Once this method has been called then the Extender object should
+     * be discarded.
+     */
+    public void write(OutputStream out) throws IOException {
+        // emit to the output stream
+        out.write(toByteArray());
+    }
+
+    /**
+     * Returns the bytes of the modified module-info.class.
+     * Once this method has been called then the Extender object should
+     * be discarded.
+     */
+    public byte[] toByteArray() throws IOException {
+        var cc = ClassFile.of();
+        var cm = cc.parse(in.readAllBytes());
+        Version v = ModuleInfoExtender.this.version;
+        return cc.transform(cm, ClassTransform.endHandler(clb -> {
+            // ModuleMainClass attribute
+            if (mainClass != null) {
+                clb.with(ModuleMainClassAttribute.of(ClassDesc.of(mainClass)));
+            }
+
+            // ModulePackages attribute
+            if (packages != null) {
+                List<PackageDesc> packageNames = packages.stream()
+                        .sorted()
+                        .map(PackageDesc::of)
+                        .toList();
+                clb.with(ModulePackagesAttribute.ofNames(packageNames));
+            }
+
+            // ModuleTarget, ModuleResolution and ModuleHashes attributes
+            if (targetPlatform != null) {
+                clb.with(ModuleTargetAttribute.of(targetPlatform));
+            }
+            if (moduleResolution != null) {
+                clb.with(ModuleResolutionAttribute.of(moduleResolution.value()));
+            }
+            if (hashes != null) {
+                clb.with(ModuleHashesAttribute.of(
+                        hashes.algorithm(),
+                        hashes.hashes().entrySet().stream().map(he ->
+                                ModuleHashInfo.of(ModuleDesc.of(
+                                        he.getKey()),
+                                        he.getValue())).toList()));
+            }
+        }).andThen((clb, cle) -> {
+            if (v != null && cle instanceof ModuleAttribute ma) {
+                clb.with(ModuleAttribute.of(
+                        ma.moduleName(),
+                        ma.moduleFlagsMask(),
+                        clb.constantPool().utf8Entry(v.toString()),
+                        ma.requires(),
+                        ma.exports(),
+                        ma.opens(),
+                        ma.uses(),
+                        ma.provides()));
+            } else {
+                clb.accept(cle);
+            }
+        }));
+    }
+
+    /**
+     * Returns an {@code Extender} that may be used to add additional
+     * attributes to the module-info.class read from the given input
+     * stream.
+     */
+    public static ModuleInfoExtender newExtender(InputStream in) {
+        return new ModuleInfoExtender(in);
+    }
+
+}
diff --git a/tests/test_data/std/jdk/internal/module/ModuleLoaderMap$Mapper.class b/tests/test_data/std/jdk/internal/module/ModuleLoaderMap$Mapper.class
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literal 0
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diff --git a/tests/test_data/std/jdk/internal/module/ModuleLoaderMap$Modules.class b/tests/test_data/std/jdk/internal/module/ModuleLoaderMap$Modules.class
new file mode 100644
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GIT binary patch
literal 2329
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literal 0
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diff --git a/tests/test_data/std/jdk/internal/module/ModuleLoaderMap.class b/tests/test_data/std/jdk/internal/module/ModuleLoaderMap.class
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diff --git a/tests/test_data/std/jdk/internal/module/ModuleLoaderMap.java b/tests/test_data/std/jdk/internal/module/ModuleLoaderMap.java
new file mode 100644
index 00000000..ad45399d
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/module/ModuleLoaderMap.java
@@ -0,0 +1,239 @@
+/*
+ * Copyright (c) 2015, 2024, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package jdk.internal.module;
+
+import java.lang.module.Configuration;
+import java.lang.module.ResolvedModule;
+import java.util.HashMap;
+import java.util.Map;
+import java.util.Set;
+import java.util.function.Function;
+
+import jdk.internal.loader.ClassLoaders;
+
+/**
+ * Supports the mapping of modules to class loaders. The set of modules mapped
+ * to the boot and platform class loaders is generated at build time from
+ * this source file.
+ */
+public final class ModuleLoaderMap {
+
+    /**
+     * Maps the system modules to the built-in class loaders.
+     */
+    private static final class Mapper implements Function<String, ClassLoader> {
+
+        private static final ClassLoader PLATFORM_CLASSLOADER =
+                ClassLoaders.platformClassLoader();
+        private static final ClassLoader APP_CLASSLOADER =
+                ClassLoaders.appClassLoader();
+
+        private static final Integer PLATFORM_LOADER_INDEX = 1;
+        private static final Integer APP_LOADER_INDEX      = 2;
+
+        /**
+         * Map from module to a class loader index. The index is resolved to the
+         * actual class loader in {@code apply}.
+         */
+        private final Map<String, Integer> map;
+
+        /**
+         * Creates a Mapper to map module names in the given Configuration to
+         * built-in classloaders.
+         *
+         * As a proxy for the actual classloader, we store an easily archiveable
+         * index value in the internal map. The index is stored as a boxed value
+         * so that we can cheaply do identity comparisons during bootstrap.
+         */
+        Mapper(Configuration cf) {
+            var map = new HashMap<String, Integer>();
+            for (ResolvedModule resolvedModule : cf.modules()) {
+                String mn = resolvedModule.name();
+                if (!Modules.bootModules.contains(mn)) {
+                    if (Modules.platformModules.contains(mn)) {
+                        map.put(mn, PLATFORM_LOADER_INDEX);
+                    } else {
+                        map.put(mn, APP_LOADER_INDEX);
+                    }
+                }
+            }
+            this.map = map;
+        }
+
+        @Override
+        public ClassLoader apply(String name) {
+            Integer loader = map.get(name);
+            if (loader == APP_LOADER_INDEX) {
+                return APP_CLASSLOADER;
+            } else if (loader == PLATFORM_LOADER_INDEX) {
+                return PLATFORM_CLASSLOADER;
+            } else { // BOOT_LOADER_INDEX
+                return null;
+            }
+        }
+    }
+
+    /**
+     * Returns the names of the modules defined to the boot loader.
+     */
+    public static Set<String> bootModules() {
+        return Modules.bootModules;
+    }
+
+    /**
+     * Returns the names of the modules defined to the platform loader.
+     */
+    public static Set<String> platformModules() {
+        return Modules.platformModules;
+    }
+
+    /**
+     * Returns the names of the modules defined to the application loader which perform native access.
+     */
+    public static Set<String> nativeAccessModules() {
+        return Modules.nativeAccessModules;
+    }
+
+    private static class Modules {
+        // list of boot modules is generated at build time.
+        private static final Set<String> bootModules =
+                Set.of(new String[] { "java.base",
+            "java.datatransfer",
+            "java.desktop",
+            "java.instrument",
+            "java.logging",
+            "java.management",
+            "java.management.rmi",
+            "java.naming",
+            "java.prefs",
+            "java.rmi",
+            "java.security.sasl",
+            "java.xml",
+            "jdk.incubator.vector",
+            "jdk.internal.vm.ci",
+            "jdk.jfr",
+            "jdk.management",
+            "jdk.management.agent",
+            "jdk.management.jfr",
+            "jdk.naming.rmi",
+            "jdk.net",
+            "jdk.nio.mapmode",
+            "jdk.sctp",
+            "jdk.unsupported" });
+
+        // list of platform modules is generated at build time.
+        private static final Set<String> platformModules =
+                Set.of(new String[] { "java.compiler",
+            "java.net.http",
+            "java.scripting",
+            "java.se",
+            "java.security.jgss",
+            "java.smartcardio",
+            "java.sql",
+            "java.sql.rowset",
+            "java.transaction.xa",
+            "java.xml.crypto",
+            "jdk.accessibility",
+            "jdk.charsets",
+            "jdk.crypto.cryptoki",
+            "jdk.dynalink",
+            "jdk.graal.compiler",
+            "jdk.graal.compiler.management",
+            "jdk.httpserver",
+            "jdk.jsobject",
+            "jdk.localedata",
+            "jdk.naming.dns",
+            "jdk.security.auth",
+            "jdk.security.jgss",
+            "jdk.xml.dom",
+            "jdk.zipfs" });
+
+        // list of jdk modules is generated at build time.
+        private static final Set<String> nativeAccessModules =
+                Set.of(new String[] { "java.base",
+            "java.datatransfer",
+            "java.desktop",
+            "java.instrument",
+            "java.logging",
+            "java.management",
+            "java.management.rmi",
+            "java.naming",
+            "java.net.http",
+            "java.prefs",
+            "java.rmi",
+            "java.scripting",
+            "java.se",
+            "java.security.jgss",
+            "java.security.sasl",
+            "java.smartcardio",
+            "java.sql",
+            "java.sql.rowset",
+            "java.transaction.xa",
+            "java.xml",
+            "java.xml.crypto",
+            "jdk.accessibility",
+            "jdk.charsets",
+            "jdk.crypto.cryptoki",
+            "jdk.dynalink",
+            "jdk.httpserver",
+            "jdk.incubator.vector",
+            "jdk.internal.le",
+            "jdk.internal.vm.ci",
+            "jdk.jfr",
+            "jdk.jsobject",
+            "jdk.localedata",
+            "jdk.management",
+            "jdk.management.agent",
+            "jdk.management.jfr",
+            "jdk.naming.dns",
+            "jdk.naming.rmi",
+            "jdk.net",
+            "jdk.nio.mapmode",
+            "jdk.sctp",
+            "jdk.security.auth",
+            "jdk.security.jgss",
+            "jdk.unsupported",
+            "jdk.xml.dom",
+            "jdk.zipfs" });
+    }
+
+    /**
+     * Returns a function to map modules in the given configuration to the
+     * built-in class loaders.
+     */
+    static Function<String, ClassLoader> mappingFunction(Configuration cf) {
+        return new Mapper(cf);
+    }
+
+    /**
+     * When defining modules for a configuration, we only allow defining modules
+     * to the boot or platform classloader if the ClassLoader mapping function
+     * originate from here.
+     */
+    public static boolean isBuiltinMapper(Function<String, ClassLoader> clf) {
+        return clf instanceof Mapper;
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/module/ModulePatcher$ExplodedResourceFinder$1.class b/tests/test_data/std/jdk/internal/module/ModulePatcher$ExplodedResourceFinder$1.class
new file mode 100644
index 0000000000000000000000000000000000000000..31b5a072b015e07c49526a40e5b846eb002adc06
GIT binary patch
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/module/ModulePatcher$ExplodedResourceFinder.class b/tests/test_data/std/jdk/internal/module/ModulePatcher$ExplodedResourceFinder.class
new file mode 100644
index 0000000000000000000000000000000000000000..dd532e50625ed4c36de3a18af3c7cc72363bed6d
GIT binary patch
literal 3239
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/module/ModulePatcher$JarResourceFinder$1.class b/tests/test_data/std/jdk/internal/module/ModulePatcher$JarResourceFinder$1.class
new file mode 100644
index 0000000000000000000000000000000000000000..cba27cb531ebbc81c04a83407ab8c7153730606a
GIT binary patch
literal 2699
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/module/ModulePatcher$JarResourceFinder.class b/tests/test_data/std/jdk/internal/module/ModulePatcher$JarResourceFinder.class
new file mode 100644
index 0000000000000000000000000000000000000000..73014a42f2ce35835dde96d11050649d5f839cdd
GIT binary patch
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/module/ModulePatcher$PatchedModuleReader$1.class b/tests/test_data/std/jdk/internal/module/ModulePatcher$PatchedModuleReader$1.class
new file mode 100644
index 0000000000000000000000000000000000000000..e797464b546fba827f38c4fe658a4259f82c207d
GIT binary patch
literal 2139
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diff --git a/tests/test_data/std/jdk/internal/module/ModulePatcher$PatchedModuleReader.class b/tests/test_data/std/jdk/internal/module/ModulePatcher$PatchedModuleReader.class
new file mode 100644
index 0000000000000000000000000000000000000000..f17635c55f6b7ea4ad5779f29e8194f21b083ab5
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diff --git a/tests/test_data/std/jdk/internal/module/ModulePatcher$ResourceFinder.class b/tests/test_data/std/jdk/internal/module/ModulePatcher$ResourceFinder.class
new file mode 100644
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literal 0
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diff --git a/tests/test_data/std/jdk/internal/module/ModulePatcher.class b/tests/test_data/std/jdk/internal/module/ModulePatcher.class
new file mode 100644
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GIT binary patch
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diff --git a/tests/test_data/std/jdk/internal/module/ModulePatcher.java b/tests/test_data/std/jdk/internal/module/ModulePatcher.java
new file mode 100644
index 00000000..ce837027
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/module/ModulePatcher.java
@@ -0,0 +1,604 @@
+/*
+ * Copyright (c) 2015, 2022, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package jdk.internal.module;
+
+import java.io.Closeable;
+import java.io.File;
+import java.io.IOError;
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.UncheckedIOException;
+import java.lang.module.ModuleDescriptor;
+import java.lang.module.ModuleDescriptor.Builder;
+import java.lang.module.ModuleReader;
+import java.lang.module.ModuleReference;
+import java.net.MalformedURLException;
+import java.net.URI;
+import java.net.URL;
+import java.nio.ByteBuffer;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.nio.file.Paths;
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.HashSet;
+import java.util.List;
+import java.util.Map;
+import java.util.Optional;
+import java.util.Set;
+import java.util.jar.JarEntry;
+import java.util.jar.JarFile;
+import java.util.stream.Stream;
+
+import jdk.internal.loader.Resource;
+import jdk.internal.access.JavaLangModuleAccess;
+import jdk.internal.access.SharedSecrets;
+import sun.net.www.ParseUtil;
+
+
+/**
+ * Provides support for patching modules, mostly the boot layer.
+ */
+
+public final class ModulePatcher {
+
+    private static final JavaLangModuleAccess JLMA
+        = SharedSecrets.getJavaLangModuleAccess();
+
+    // module name -> sequence of patches (directories or JAR files)
+    private final Map<String, List<Path>> map;
+
+    /**
+     * Initialize the module patcher with the given map. The map key is
+     * the module name, the value is a list of path strings.
+     */
+    public ModulePatcher(Map<String, List<String>> input) {
+        if (input.isEmpty()) {
+            this.map = Map.of();
+        } else {
+            Map<String, List<Path>> map = new HashMap<>();
+            for (Map.Entry<String, List<String>> e : input.entrySet()) {
+                String mn = e.getKey();
+                List<Path> paths = e.getValue().stream()
+                        .map(Paths::get)
+                        .toList();
+                map.put(mn, paths);
+            }
+            this.map = map;
+        }
+    }
+
+    /**
+     * Returns a module reference that interposes on the given module if
+     * needed. If there are no patches for the given module then the module
+     * reference is simply returned. Otherwise the patches for the module
+     * are scanned (to find any new packages) and a new module reference is
+     * returned.
+     *
+     * @throws UncheckedIOException if an I/O error is detected
+     */
+    public ModuleReference patchIfNeeded(ModuleReference mref) {
+        // if there are no patches for the module then nothing to do
+        ModuleDescriptor descriptor = mref.descriptor();
+        String mn = descriptor.name();
+        List<Path> paths = map.get(mn);
+        if (paths == null)
+            return mref;
+
+        // Scan the JAR file or directory tree to get the set of packages.
+        // For automatic modules then packages that do not contain class files
+        // must be ignored.
+        Set<String> packages = new HashSet<>();
+        boolean isAutomatic = descriptor.isAutomatic();
+        try {
+            for (Path file : paths) {
+                if (Files.isRegularFile(file)) {
+
+                    // JAR file - do not open as a multi-release JAR as this
+                    // is not supported by the boot class loader
+                    try (JarFile jf = new JarFile(file.toString())) {
+                        jf.stream()
+                          .filter(e -> !e.isDirectory()
+                                  && (!isAutomatic || e.getName().endsWith(".class")))
+                          .map(e -> toPackageName(file, e))
+                          .filter(Checks::isPackageName)
+                          .forEach(packages::add);
+                    }
+
+                } else if (Files.isDirectory(file)) {
+
+                    // exploded directory without following sym links
+                    Path top = file;
+                    try (Stream<Path> stream = Files.find(top, Integer.MAX_VALUE,
+                            ((path, attrs) -> attrs.isRegularFile()))) {
+                        stream.filter(path -> (!isAutomatic
+                                      || path.toString().endsWith(".class"))
+                                      && !isHidden(path))
+                            .map(path -> toPackageName(top, path))
+                            .filter(Checks::isPackageName)
+                            .forEach(packages::add);
+                    }
+
+                }
+            }
+
+        } catch (IOException ioe) {
+            throw new UncheckedIOException(ioe);
+        }
+
+        // if there are new packages then we need a new ModuleDescriptor
+        packages.removeAll(descriptor.packages());
+        if (!packages.isEmpty()) {
+            Builder builder = JLMA.newModuleBuilder(descriptor.name(),
+                                                    /*strict*/ descriptor.isAutomatic(),
+                                                    descriptor.modifiers());
+            if (!descriptor.isAutomatic()) {
+                descriptor.requires().forEach(builder::requires);
+                descriptor.exports().forEach(builder::exports);
+                descriptor.opens().forEach(builder::opens);
+                descriptor.uses().forEach(builder::uses);
+            }
+            descriptor.provides().forEach(builder::provides);
+
+            descriptor.version().ifPresent(builder::version);
+            descriptor.mainClass().ifPresent(builder::mainClass);
+
+            // original + new packages
+            builder.packages(descriptor.packages());
+            builder.packages(packages);
+
+            descriptor = builder.build();
+        }
+
+        // return a module reference to the patched module
+        URI location = mref.location().orElse(null);
+
+        ModuleTarget target = null;
+        ModuleHashes recordedHashes = null;
+        ModuleHashes.HashSupplier hasher = null;
+        ModuleResolution mres = null;
+        if (mref instanceof ModuleReferenceImpl) {
+            ModuleReferenceImpl impl = (ModuleReferenceImpl)mref;
+            target = impl.moduleTarget();
+            recordedHashes = impl.recordedHashes();
+            hasher = impl.hasher();
+            mres = impl.moduleResolution();
+        }
+
+        return new ModuleReferenceImpl(descriptor,
+                                       location,
+                                       () -> new PatchedModuleReader(paths, mref),
+                                       this,
+                                       target,
+                                       recordedHashes,
+                                       hasher,
+                                       mres);
+
+    }
+
+    /**
+     * Returns true is this module patcher has patches.
+     */
+    public boolean hasPatches() {
+        return !map.isEmpty();
+    }
+
+    /*
+     * Returns the names of the patched modules.
+     */
+    Set<String> patchedModules() {
+        return map.keySet();
+    }
+
+    /**
+     * A ModuleReader that reads resources from a patched module.
+     *
+     * This class is public so as to expose the findResource method to the
+     * built-in class loaders and avoid locating the resource twice during
+     * class loading (once to locate the resource, the second to gets the
+     * URL for the CodeSource).
+     */
+    public static class PatchedModuleReader implements ModuleReader {
+        private final List<ResourceFinder> finders;
+        private final ModuleReference mref;
+        private final URL delegateCodeSourceURL;
+        private volatile ModuleReader delegate;
+
+        /**
+         * Creates the ModuleReader to reads resources in a patched module.
+         */
+        PatchedModuleReader(List<Path> patches, ModuleReference mref) {
+            List<ResourceFinder> finders = new ArrayList<>();
+            boolean initialized = false;
+            try {
+                for (Path file : patches) {
+                    if (Files.isRegularFile(file)) {
+                        finders.add(new JarResourceFinder(file));
+                    } else {
+                        finders.add(new ExplodedResourceFinder(file));
+                    }
+                }
+                initialized = true;
+            } catch (IOException ioe) {
+                throw new UncheckedIOException(ioe);
+            } finally {
+                // close all ResourceFinder in the event of an error
+                if (!initialized) closeAll(finders);
+            }
+
+            this.finders = finders;
+            this.mref = mref;
+            this.delegateCodeSourceURL = codeSourceURL(mref);
+        }
+
+        /**
+         * Closes all resource finders.
+         */
+        private static void closeAll(List<ResourceFinder> finders) {
+            for (ResourceFinder finder : finders) {
+                try { finder.close(); } catch (IOException ioe) { }
+            }
+        }
+
+        /**
+         * Returns the code source URL for the given module.
+         */
+        private static URL codeSourceURL(ModuleReference mref) {
+            try {
+                Optional<URI> ouri = mref.location();
+                if (ouri.isPresent())
+                    return ouri.get().toURL();
+            } catch (MalformedURLException e) { }
+            return null;
+        }
+
+        /**
+         * Returns the ModuleReader to delegate to when the resource is not
+         * found in a patch location.
+         */
+        private ModuleReader delegate() throws IOException {
+            ModuleReader r = delegate;
+            if (r == null) {
+                synchronized (this) {
+                    r = delegate;
+                    if (r == null) {
+                        delegate = r = mref.open();
+                    }
+                }
+            }
+            return r;
+        }
+
+        /**
+         * Finds a resources in the patch locations. Returns null if not found
+         * or the name is "module-info.class" as that cannot be overridden.
+         */
+        private Resource findResourceInPatch(String name) throws IOException {
+            if (!name.equals("module-info.class")) {
+                for (ResourceFinder finder : finders) {
+                    Resource r = finder.find(name);
+                    if (r != null)
+                        return r;
+                }
+            }
+            return null;
+        }
+
+        /**
+         * Finds a resource of the given name in the patched module.
+         */
+        public Resource findResource(String name) throws IOException {
+
+            // patch locations
+            Resource r = findResourceInPatch(name);
+            if (r != null)
+                return r;
+
+            // original module
+            ByteBuffer bb = delegate().read(name).orElse(null);
+            if (bb == null)
+                return null;
+
+            return new Resource() {
+                private <T> T shouldNotGetHere(Class<T> type) {
+                    throw new InternalError("should not get here");
+                }
+                @Override
+                public String getName() {
+                    return shouldNotGetHere(String.class);
+                }
+                @Override
+                public URL getURL() {
+                    return shouldNotGetHere(URL.class);
+                }
+                @Override
+                public URL getCodeSourceURL() {
+                    return delegateCodeSourceURL;
+                }
+                @Override
+                public ByteBuffer getByteBuffer() throws IOException {
+                    return bb;
+                }
+                @Override
+                public InputStream getInputStream() throws IOException {
+                    return shouldNotGetHere(InputStream.class);
+                }
+                @Override
+                public int getContentLength() throws IOException {
+                    return shouldNotGetHere(int.class);
+                }
+            };
+        }
+
+        @Override
+        public Optional<URI> find(String name) throws IOException {
+            Resource r = findResourceInPatch(name);
+            if (r != null) {
+                URI uri = URI.create(r.getURL().toString());
+                return Optional.of(uri);
+            } else {
+                return delegate().find(name);
+            }
+        }
+
+        @Override
+        public Optional<InputStream> open(String name) throws IOException {
+            Resource r = findResourceInPatch(name);
+            if (r != null) {
+                return Optional.of(r.getInputStream());
+            } else {
+                return delegate().open(name);
+            }
+        }
+
+        @Override
+        public Optional<ByteBuffer> read(String name) throws IOException {
+            Resource r = findResourceInPatch(name);
+            if (r != null) {
+                ByteBuffer bb = r.getByteBuffer();
+                assert !bb.isDirect();
+                return Optional.of(bb);
+            } else {
+                return delegate().read(name);
+            }
+        }
+
+        @Override
+        public void release(ByteBuffer bb) {
+            if (bb.isDirect()) {
+                try {
+                    delegate().release(bb);
+                } catch (IOException ioe) {
+                    throw new InternalError(ioe);
+                }
+            }
+        }
+
+        @Override
+        public Stream<String> list() throws IOException {
+            Stream<String> s = delegate().list();
+            for (ResourceFinder finder : finders) {
+                s = Stream.concat(s, finder.list());
+            }
+            return s.distinct();
+        }
+
+        @Override
+        public void close() throws IOException {
+            closeAll(finders);
+            delegate().close();
+        }
+    }
+
+
+    /**
+     * A resource finder that find resources in a patch location.
+     */
+    private static interface ResourceFinder extends Closeable {
+        Resource find(String name) throws IOException;
+        Stream<String> list() throws IOException;
+    }
+
+
+    /**
+     * A ResourceFinder that finds resources in a JAR file.
+     */
+    private static class JarResourceFinder implements ResourceFinder {
+        private final JarFile jf;
+        private final URL csURL;
+
+        JarResourceFinder(Path path) throws IOException {
+            this.jf = new JarFile(path.toString());
+            this.csURL = path.toUri().toURL();
+        }
+
+        @Override
+        public void close() throws IOException {
+            jf.close();
+        }
+
+        @Override
+        public Resource find(String name) throws IOException {
+            JarEntry entry = jf.getJarEntry(name);
+            if (entry == null)
+                return null;
+
+            return new Resource() {
+                @Override
+                public String getName() {
+                    return name;
+                }
+                @Override
+                public URL getURL() {
+                    String encodedPath = ParseUtil.encodePath(name, false);
+                    try {
+                        @SuppressWarnings("deprecation")
+                        var result = new URL("jar:" + csURL + "!/" + encodedPath);
+                        return result;
+                    } catch (MalformedURLException e) {
+                        return null;
+                    }
+                }
+                @Override
+                public URL getCodeSourceURL() {
+                    return csURL;
+                }
+                @Override
+                public ByteBuffer getByteBuffer() throws IOException {
+                    byte[] bytes = getInputStream().readAllBytes();
+                    return ByteBuffer.wrap(bytes);
+                }
+                @Override
+                public InputStream getInputStream() throws IOException {
+                    return jf.getInputStream(entry);
+                }
+                @Override
+                public int getContentLength() throws IOException {
+                    long size = entry.getSize();
+                    return (size > Integer.MAX_VALUE) ? -1 : (int) size;
+                }
+            };
+        }
+
+        @Override
+        public Stream<String> list() throws IOException {
+            return jf.stream().map(JarEntry::getName);
+        }
+    }
+
+
+    /**
+     * A ResourceFinder that finds resources on the file system.
+     */
+    private static class ExplodedResourceFinder implements ResourceFinder {
+        private final Path dir;
+
+        ExplodedResourceFinder(Path dir) {
+            this.dir = dir;
+        }
+
+        @Override
+        public void close() { }
+
+        @Override
+        public Resource find(String name) throws IOException {
+            Path file = Resources.toFilePath(dir, name);
+            if (file != null) {
+                return newResource(name, dir, file);
+            } else {
+                return null;
+            }
+        }
+
+        private Resource newResource(String name, Path top, Path file) {
+            return new Resource() {
+                @Override
+                public String getName() {
+                    return name;
+                }
+                @Override
+                public URL getURL() {
+                    try {
+                        return file.toUri().toURL();
+                    } catch (IOException | IOError e) {
+                        return null;
+                    }
+                }
+                @Override
+                public URL getCodeSourceURL() {
+                    try {
+                        return top.toUri().toURL();
+                    } catch (IOException | IOError e) {
+                        return null;
+                    }
+                }
+                @Override
+                public ByteBuffer getByteBuffer() throws IOException {
+                    return ByteBuffer.wrap(Files.readAllBytes(file));
+                }
+                @Override
+                public InputStream getInputStream() throws IOException {
+                    return Files.newInputStream(file);
+                }
+                @Override
+                public int getContentLength() throws IOException {
+                    long size = Files.size(file);
+                    return (size > Integer.MAX_VALUE) ? -1 : (int)size;
+                }
+            };
+        }
+
+        @Override
+        public Stream<String> list() throws IOException {
+            return Files.walk(dir, Integer.MAX_VALUE)
+                        .map(f -> Resources.toResourceName(dir, f))
+                        .filter(s -> !s.isEmpty());
+        }
+    }
+
+
+    /**
+     * Derives a package name from the file path of an entry in an exploded patch
+     */
+    private static String toPackageName(Path top, Path file) {
+        Path entry = top.relativize(file);
+        Path parent = entry.getParent();
+        if (parent == null) {
+            return warnIfModuleInfo(top, entry.toString());
+        } else {
+            return parent.toString().replace(File.separatorChar, '.');
+        }
+    }
+
+    /**
+     * Returns true if the given file exists and is a hidden file
+     */
+    private boolean isHidden(Path file) {
+        try {
+            return Files.isHidden(file);
+        } catch (IOException ioe) {
+            return false;
+        }
+    }
+
+    /**
+     * Derives a package name from the name of an entry in a JAR file.
+     */
+    private static String toPackageName(Path file, JarEntry entry) {
+        String name = entry.getName();
+        int index = name.lastIndexOf("/");
+        if (index == -1) {
+            return warnIfModuleInfo(file, name);
+        } else {
+            return name.substring(0, index).replace('/', '.');
+        }
+    }
+
+    private static String warnIfModuleInfo(Path file, String e) {
+        if (e.equals("module-info.class"))
+            System.err.println("WARNING: " + e + " ignored in patch: " + file);
+        return "";
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/module/ModulePath$Patterns.class b/tests/test_data/std/jdk/internal/module/ModulePath$Patterns.class
new file mode 100644
index 0000000000000000000000000000000000000000..e53b7523c4dbe5812f6381cc795fd76cf2c94456
GIT binary patch
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diff --git a/tests/test_data/std/jdk/internal/module/ModulePath.class b/tests/test_data/std/jdk/internal/module/ModulePath.class
new file mode 100644
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/module/ModulePath.java b/tests/test_data/std/jdk/internal/module/ModulePath.java
new file mode 100644
index 00000000..2804079c
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/module/ModulePath.java
@@ -0,0 +1,789 @@
+/*
+ * Copyright (c) 2014, 2022, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package jdk.internal.module;
+
+import java.io.BufferedInputStream;
+import java.io.BufferedReader;
+import java.io.File;
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.InputStreamReader;
+import java.io.UncheckedIOException;
+import java.lang.module.FindException;
+import java.lang.module.InvalidModuleDescriptorException;
+import java.lang.module.ModuleDescriptor;
+import java.lang.module.ModuleDescriptor.Builder;
+import java.lang.module.ModuleFinder;
+import java.lang.module.ModuleReference;
+import java.net.URI;
+import java.nio.file.DirectoryStream;
+import java.nio.file.Files;
+import java.nio.file.NoSuchFileException;
+import java.nio.file.Path;
+import java.nio.file.attribute.BasicFileAttributes;
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import java.util.Objects;
+import java.util.Optional;
+import java.util.Set;
+import java.util.jar.Attributes;
+import java.util.jar.JarEntry;
+import java.util.jar.JarFile;
+import java.util.jar.Manifest;
+import java.util.regex.Matcher;
+import java.util.regex.Pattern;
+import java.util.stream.Collectors;
+import java.util.stream.Stream;
+import java.util.zip.ZipException;
+import java.util.zip.ZipFile;
+
+import sun.nio.cs.UTF_8;
+
+import jdk.internal.jmod.JmodFile;
+import jdk.internal.jmod.JmodFile.Section;
+import jdk.internal.perf.PerfCounter;
+
+/**
+ * A {@code ModuleFinder} that locates modules on the file system by searching
+ * a sequence of directories or packaged modules. The ModuleFinder can be
+ * created to work in either the run-time or link-time phases. In both cases it
+ * locates modular JAR and exploded modules. When created for link-time then it
+ * additionally locates modules in JMOD files. The ModuleFinder can also
+ * optionally patch any modules that it locates with a ModulePatcher.
+ */
+
+public class ModulePath implements ModuleFinder {
+    private static final String MODULE_INFO = "module-info.class";
+
+    // the version to use for multi-release modular JARs
+    private final Runtime.Version releaseVersion;
+
+    // true for the link phase (supports modules packaged in JMOD format)
+    private final boolean isLinkPhase;
+
+    // for patching modules, can be null
+    private final ModulePatcher patcher;
+
+    // the entries on this module path
+    private final Path[] entries;
+    private int next;
+
+    // map of module name to module reference map for modules already located
+    private final Map<String, ModuleReference> cachedModules = new HashMap<>();
+
+
+    private ModulePath(Runtime.Version version,
+                       boolean isLinkPhase,
+                       ModulePatcher patcher,
+                       Path... entries) {
+        this.releaseVersion = version;
+        this.isLinkPhase = isLinkPhase;
+        this.patcher = patcher;
+        this.entries = entries.clone();
+        for (Path entry : this.entries) {
+            Objects.requireNonNull(entry);
+        }
+    }
+
+    /**
+     * Returns a ModuleFinder that locates modules on the file system by
+     * searching a sequence of directories and/or packaged modules. The modules
+     * may be patched by the given ModulePatcher.
+     */
+    public static ModuleFinder of(ModulePatcher patcher, Path... entries) {
+        return new ModulePath(JarFile.runtimeVersion(), false, patcher, entries);
+    }
+
+    /**
+     * Returns a ModuleFinder that locates modules on the file system by
+     * searching a sequence of directories and/or packaged modules.
+     */
+    public static ModuleFinder of(Path... entries) {
+        return of((ModulePatcher)null, entries);
+    }
+
+    /**
+     * Returns a ModuleFinder that locates modules on the file system by
+     * searching a sequence of directories and/or packaged modules.
+     *
+     * @param version The release version to use for multi-release JAR files
+     * @param isLinkPhase {@code true} if the link phase to locate JMOD files
+     */
+    public static ModuleFinder of(Runtime.Version version,
+                                  boolean isLinkPhase,
+                                  Path... entries) {
+        return new ModulePath(version, isLinkPhase, null, entries);
+    }
+
+
+    @Override
+    public Optional<ModuleReference> find(String name) {
+        Objects.requireNonNull(name);
+
+        // try cached modules
+        ModuleReference m = cachedModules.get(name);
+        if (m != null)
+            return Optional.of(m);
+
+        // the module may not have been encountered yet
+        while (hasNextEntry()) {
+            scanNextEntry();
+            m = cachedModules.get(name);
+            if (m != null)
+                return Optional.of(m);
+        }
+        return Optional.empty();
+    }
+
+    @Override
+    public Set<ModuleReference> findAll() {
+        // need to ensure that all entries have been scanned
+        while (hasNextEntry()) {
+            scanNextEntry();
+        }
+        return cachedModules.values().stream().collect(Collectors.toSet());
+    }
+
+    /**
+     * Returns {@code true} if there are additional entries to scan
+     */
+    private boolean hasNextEntry() {
+        return next < entries.length;
+    }
+
+    /**
+     * Scans the next entry on the module path. A no-op if all entries have
+     * already been scanned.
+     *
+     * @throws FindException if an error occurs scanning the next entry
+     */
+    private void scanNextEntry() {
+        if (hasNextEntry()) {
+
+            long t0 = System.nanoTime();
+
+            Path entry = entries[next];
+            Map<String, ModuleReference> modules = scan(entry);
+            next++;
+
+            // update cache, ignoring duplicates
+            int initialSize = cachedModules.size();
+            for (Map.Entry<String, ModuleReference> e : modules.entrySet()) {
+                cachedModules.putIfAbsent(e.getKey(), e.getValue());
+            }
+
+            // update counters
+            int added = cachedModules.size() - initialSize;
+            moduleCount.add(added);
+
+            scanTime.addElapsedTimeFrom(t0);
+        }
+    }
+
+
+    /**
+     * Scan the given module path entry. If the entry is a directory then it is
+     * a directory of modules or an exploded module. If the entry is a regular
+     * file then it is assumed to be a packaged module.
+     *
+     * @throws FindException if an error occurs scanning the entry
+     */
+    private Map<String, ModuleReference> scan(Path entry) {
+
+        BasicFileAttributes attrs;
+        try {
+            attrs = Files.readAttributes(entry, BasicFileAttributes.class);
+        } catch (NoSuchFileException e) {
+            return Map.of();
+        } catch (IOException ioe) {
+            throw new FindException(ioe);
+        }
+
+        try {
+
+            if (attrs.isDirectory()) {
+                Path mi = entry.resolve(MODULE_INFO);
+                if (!Files.exists(mi)) {
+                    // assume a directory of modules
+                    return scanDirectory(entry);
+                }
+            }
+
+            // packaged or exploded module
+            ModuleReference mref = readModule(entry, attrs);
+            if (mref != null) {
+                String name = mref.descriptor().name();
+                return Map.of(name, mref);
+            }
+
+            // not recognized
+            String msg;
+            if (!isLinkPhase && entry.toString().endsWith(".jmod")) {
+                msg = "JMOD format not supported at execution time";
+            } else {
+                msg = "Module format not recognized";
+            }
+            throw new FindException(msg + ": " + entry);
+
+        } catch (IOException ioe) {
+            throw new FindException(ioe);
+        }
+    }
+
+
+    /**
+     * Scans the given directory for packaged or exploded modules.
+     *
+     * @return a map of module name to ModuleReference for the modules found
+     *         in the directory
+     *
+     * @throws IOException if an I/O error occurs
+     * @throws FindException if an error occurs scanning the entry or the
+     *         directory contains two or more modules with the same name
+     */
+    private Map<String, ModuleReference> scanDirectory(Path dir)
+        throws IOException
+    {
+        // The map of name -> mref of modules found in this directory.
+        Map<String, ModuleReference> nameToReference = new HashMap<>();
+
+        try (DirectoryStream<Path> stream = Files.newDirectoryStream(dir)) {
+            for (Path entry : stream) {
+                BasicFileAttributes attrs;
+                try {
+                    attrs = Files.readAttributes(entry, BasicFileAttributes.class);
+                } catch (NoSuchFileException ignore) {
+                    // file has been removed or moved, ignore for now
+                    continue;
+                }
+
+                ModuleReference mref = readModule(entry, attrs);
+
+                // module found
+                if (mref != null) {
+                    // can have at most one version of a module in the directory
+                    String name = mref.descriptor().name();
+                    ModuleReference previous = nameToReference.put(name, mref);
+                    if (previous != null) {
+                        String fn1 = fileName(mref);
+                        String fn2 = fileName(previous);
+                        throw new FindException("Two versions of module "
+                                                 + name + " found in " + dir
+                                                 + " (" + fn1 + " and " + fn2 + ")");
+                    }
+                }
+            }
+        }
+
+        return nameToReference;
+    }
+
+
+    /**
+     * Reads a packaged or exploded module, returning a {@code ModuleReference}
+     * to the module. Returns {@code null} if the entry is not recognized.
+     *
+     * @throws IOException if an I/O error occurs
+     * @throws FindException if an error occurs parsing its module descriptor
+     */
+    private ModuleReference readModule(Path entry, BasicFileAttributes attrs)
+        throws IOException
+    {
+        try {
+
+            // exploded module
+            if (attrs.isDirectory()) {
+                return readExplodedModule(entry); // may return null
+            }
+
+            // JAR or JMOD file
+            if (attrs.isRegularFile()) {
+                String fn = entry.getFileName().toString();
+                boolean isDefaultFileSystem = isDefaultFileSystem(entry);
+
+                // JAR file
+                if (fn.endsWith(".jar")) {
+                    if (isDefaultFileSystem) {
+                        return readJar(entry);
+                    } else {
+                        // the JAR file is in a custom file system so
+                        // need to copy it to the local file system
+                        Path tmpdir = Files.createTempDirectory("mlib");
+                        Path target = Files.copy(entry, tmpdir.resolve(fn));
+                        return readJar(target);
+                    }
+                }
+
+                // JMOD file
+                if (isDefaultFileSystem && isLinkPhase && fn.endsWith(".jmod")) {
+                    return readJMod(entry);
+                }
+            }
+
+            return null;
+
+        } catch (InvalidModuleDescriptorException e) {
+            throw new FindException("Error reading module: " + entry, e);
+        }
+    }
+
+    /**
+     * Returns a string with the file name of the module if possible.
+     * If the module location is not a file URI then return the URI
+     * as a string.
+     */
+    private String fileName(ModuleReference mref) {
+        URI uri = mref.location().orElse(null);
+        if (uri != null) {
+            if (uri.getScheme().equalsIgnoreCase("file")) {
+                Path file = Path.of(uri);
+                return file.getFileName().toString();
+            } else {
+                return uri.toString();
+            }
+        } else {
+            return "<unknown>";
+        }
+    }
+
+    // -- JMOD files --
+
+    private Set<String> jmodPackages(JmodFile jf) {
+        return jf.stream()
+            .filter(e -> e.section() == Section.CLASSES)
+            .map(JmodFile.Entry::name)
+            .map(this::toPackageName)
+            .flatMap(Optional::stream)
+            .collect(Collectors.toSet());
+    }
+
+    /**
+     * Returns a {@code ModuleReference} to a module in JMOD file on the
+     * file system.
+     *
+     * @throws IOException
+     * @throws InvalidModuleDescriptorException
+     */
+    private ModuleReference readJMod(Path file) throws IOException {
+        try (JmodFile jf = new JmodFile(file)) {
+            ModuleInfo.Attributes attrs;
+            try (InputStream in = jf.getInputStream(Section.CLASSES, MODULE_INFO)) {
+                attrs  = ModuleInfo.read(in, () -> jmodPackages(jf));
+            }
+            return ModuleReferences.newJModModule(attrs, file);
+        }
+    }
+
+
+    // -- JAR files --
+
+    private static final String SERVICES_PREFIX = "META-INF/services/";
+
+    private static final Attributes.Name AUTOMATIC_MODULE_NAME
+        = new Attributes.Name("Automatic-Module-Name");
+
+    /**
+     * Returns the service type corresponding to the name of a services
+     * configuration file if it is a legal type name.
+     *
+     * For example, if called with "META-INF/services/p.S" then this method
+     * returns a container with the value "p.S".
+     */
+    private Optional<String> toServiceName(String cf) {
+        assert cf.startsWith(SERVICES_PREFIX);
+        int index = cf.lastIndexOf("/") + 1;
+        if (index < cf.length()) {
+            String prefix = cf.substring(0, index);
+            if (prefix.equals(SERVICES_PREFIX)) {
+                String sn = cf.substring(index);
+                if (Checks.isClassName(sn))
+                    return Optional.of(sn);
+            }
+        }
+        return Optional.empty();
+    }
+
+    /**
+     * Reads the next line from the given reader and trims it of comments and
+     * leading/trailing white space.
+     *
+     * Returns null if the reader is at EOF.
+     */
+    private String nextLine(BufferedReader reader) throws IOException {
+        String ln = reader.readLine();
+        if (ln != null) {
+            int ci = ln.indexOf('#');
+            if (ci >= 0)
+                ln = ln.substring(0, ci);
+            ln = ln.trim();
+        }
+        return ln;
+    }
+
+    /**
+     * Treat the given JAR file as a module as follows:
+     *
+     * 1. The value of the Automatic-Module-Name attribute is the module name
+     * 2. The version, and the module name when the  Automatic-Module-Name
+     *    attribute is not present, is derived from the file ame of the JAR file
+     * 3. All packages are derived from the .class files in the JAR file
+     * 4. The contents of any META-INF/services configuration files are mapped
+     *    to "provides" declarations
+     * 5. The Main-Class attribute in the main attributes of the JAR manifest
+     *    is mapped to the module descriptor mainClass if possible
+     */
+    private ModuleDescriptor deriveModuleDescriptor(JarFile jf)
+        throws IOException
+    {
+        // Read Automatic-Module-Name attribute if present
+        Manifest man = jf.getManifest();
+        Attributes attrs = null;
+        String moduleName = null;
+        if (man != null) {
+            attrs = man.getMainAttributes();
+            if (attrs != null) {
+                moduleName = attrs.getValue(AUTOMATIC_MODULE_NAME);
+            }
+        }
+
+        // Derive the version, and the module name if needed, from JAR file name
+        String fn = jf.getName();
+        int i = fn.lastIndexOf(File.separator);
+        if (i != -1)
+            fn = fn.substring(i + 1);
+
+        // drop ".jar"
+        String name = fn.substring(0, fn.length() - 4);
+        String vs = null;
+
+        // find first occurrence of -${NUMBER}. or -${NUMBER}$
+        Matcher matcher = Patterns.DASH_VERSION.matcher(name);
+        if (matcher.find()) {
+            int start = matcher.start();
+
+            // attempt to parse the tail as a version string
+            try {
+                String tail = name.substring(start + 1);
+                ModuleDescriptor.Version.parse(tail);
+                vs = tail;
+            } catch (IllegalArgumentException ignore) { }
+
+            name = name.substring(0, start);
+        }
+
+        // Create builder, using the name derived from file name when
+        // Automatic-Module-Name not present
+        Builder builder;
+        if (moduleName != null) {
+            try {
+                builder = ModuleDescriptor.newAutomaticModule(moduleName);
+            } catch (IllegalArgumentException e) {
+                throw new FindException(AUTOMATIC_MODULE_NAME + ": " + e.getMessage());
+            }
+        } else {
+            builder = ModuleDescriptor.newAutomaticModule(cleanModuleName(name));
+        }
+
+        // module version if present
+        if (vs != null)
+            builder.version(vs);
+
+        // scan the names of the entries in the JAR file
+        Map<Boolean, Set<String>> map = jf.versionedStream()
+                .filter(e -> !e.isDirectory())
+                .map(JarEntry::getName)
+                .filter(e -> (e.endsWith(".class") ^ e.startsWith(SERVICES_PREFIX)))
+                .collect(Collectors.partitioningBy(e -> e.startsWith(SERVICES_PREFIX),
+                                                   Collectors.toSet()));
+
+        Set<String> classFiles = map.get(Boolean.FALSE);
+        Set<String> configFiles = map.get(Boolean.TRUE);
+
+        // the packages containing class files
+        Set<String> packages = classFiles.stream()
+                .map(this::toPackageName)
+                .flatMap(Optional::stream)
+                .collect(Collectors.toSet());
+
+        // all packages are exported and open
+        builder.packages(packages);
+
+        // map names of service configuration files to service names
+        Set<String> serviceNames = configFiles.stream()
+                .map(this::toServiceName)
+                .flatMap(Optional::stream)
+                .collect(Collectors.toSet());
+
+        // parse each service configuration file
+        for (String sn : serviceNames) {
+            JarEntry entry = jf.getJarEntry(SERVICES_PREFIX + sn);
+            List<String> providerClasses = new ArrayList<>();
+            try (InputStream in = jf.getInputStream(entry)) {
+                BufferedReader reader
+                    = new BufferedReader(new InputStreamReader(in, UTF_8.INSTANCE));
+                String cn;
+                while ((cn = nextLine(reader)) != null) {
+                    if (!cn.isEmpty()) {
+                        String pn = packageName(cn);
+                        if (!packages.contains(pn)) {
+                            String msg = "Provider class " + cn + " not in JAR file " + fn;
+                            throw new InvalidModuleDescriptorException(msg);
+                        }
+                        providerClasses.add(cn);
+                    }
+                }
+            }
+            if (!providerClasses.isEmpty())
+                builder.provides(sn, providerClasses);
+        }
+
+        // Main-Class attribute if it exists
+        if (attrs != null) {
+            String mainClass = attrs.getValue(Attributes.Name.MAIN_CLASS);
+            if (mainClass != null) {
+                mainClass = mainClass.replace('/', '.');
+                if (Checks.isClassName(mainClass)) {
+                    String pn = packageName(mainClass);
+                    if (packages.contains(pn)) {
+                        builder.mainClass(mainClass);
+                    }
+                }
+            }
+        }
+
+        return builder.build();
+    }
+
+    /**
+     * Patterns used to derive the module name from a JAR file name.
+     */
+    private static class Patterns {
+        static final Pattern DASH_VERSION = Pattern.compile("-(\\d+(\\.|$))");
+        static final Pattern NON_ALPHANUM = Pattern.compile("[^A-Za-z0-9]");
+        static final Pattern REPEATING_DOTS = Pattern.compile("(\\.)(\\1)+");
+        static final Pattern LEADING_DOTS = Pattern.compile("^\\.");
+        static final Pattern TRAILING_DOTS = Pattern.compile("\\.$");
+    }
+
+    /**
+     * Clean up candidate module name derived from a JAR file name.
+     */
+    private static String cleanModuleName(String mn) {
+        // replace non-alphanumeric
+        mn = Patterns.NON_ALPHANUM.matcher(mn).replaceAll(".");
+
+        // collapse repeating dots
+        mn = Patterns.REPEATING_DOTS.matcher(mn).replaceAll(".");
+
+        // drop leading dots
+        if (!mn.isEmpty() && mn.charAt(0) == '.')
+            mn = Patterns.LEADING_DOTS.matcher(mn).replaceAll("");
+
+        // drop trailing dots
+        int len = mn.length();
+        if (len > 0 && mn.charAt(len-1) == '.')
+            mn = Patterns.TRAILING_DOTS.matcher(mn).replaceAll("");
+
+        return mn;
+    }
+
+    private Set<String> jarPackages(JarFile jf) {
+        return jf.versionedStream()
+                .filter(e -> !e.isDirectory())
+                .map(JarEntry::getName)
+                .map(this::toPackageName)
+                .flatMap(Optional::stream)
+                .collect(Collectors.toSet());
+    }
+
+    /**
+     * Returns a {@code ModuleReference} to a module in modular JAR file on
+     * the file system.
+     *
+     * @throws IOException
+     * @throws FindException
+     * @throws InvalidModuleDescriptorException
+     */
+    private ModuleReference readJar(Path file) throws IOException {
+        try (JarFile jf = new JarFile(file.toFile(),
+                                      true,               // verify
+                                      ZipFile.OPEN_READ,
+                                      releaseVersion))
+        {
+            ModuleInfo.Attributes attrs;
+            JarEntry entry = jf.getJarEntry(MODULE_INFO);
+            if (entry == null) {
+
+                // no module-info.class so treat it as automatic module
+                try {
+                    ModuleDescriptor md = deriveModuleDescriptor(jf);
+                    attrs = new ModuleInfo.Attributes(md, null, null, null);
+                } catch (RuntimeException e) {
+                    throw new FindException("Unable to derive module descriptor for "
+                                            + jf.getName(), e);
+                }
+
+            } else {
+                attrs = ModuleInfo.read(jf.getInputStream(entry),
+                                        () -> jarPackages(jf));
+            }
+
+            return ModuleReferences.newJarModule(attrs, patcher, file);
+        } catch (ZipException e) {
+            throw new FindException("Error reading " + file, e);
+        }
+    }
+
+
+    // -- exploded directories --
+
+    private Set<String> explodedPackages(Path dir) {
+        String separator = dir.getFileSystem().getSeparator();
+        try (Stream<Path> stream = Files.find(dir, Integer.MAX_VALUE,
+                (path, attrs) -> attrs.isRegularFile() && !isHidden(path))) {
+            return stream.map(dir::relativize)
+                .map(path -> toPackageName(path, separator))
+                .flatMap(Optional::stream)
+                .collect(Collectors.toSet());
+        } catch (IOException x) {
+            throw new UncheckedIOException(x);
+        }
+    }
+
+    /**
+     * Returns a {@code ModuleReference} to an exploded module on the file
+     * system or {@code null} if {@code module-info.class} not found.
+     *
+     * @throws IOException
+     * @throws InvalidModuleDescriptorException
+     */
+    private ModuleReference readExplodedModule(Path dir) throws IOException {
+        Path mi = dir.resolve(MODULE_INFO);
+        ModuleInfo.Attributes attrs;
+        try (InputStream in = Files.newInputStream(mi)) {
+            attrs = ModuleInfo.read(new BufferedInputStream(in),
+                                    () -> explodedPackages(dir));
+        } catch (NoSuchFileException e) {
+            // for now
+            return null;
+        }
+        return ModuleReferences.newExplodedModule(attrs, patcher, dir);
+    }
+
+    /**
+     * Maps a type name to its package name.
+     */
+    private static String packageName(String cn) {
+        int index = cn.lastIndexOf('.');
+        return (index == -1) ? "" : cn.substring(0, index);
+    }
+
+    /**
+     * Maps the name of an entry in a JAR or ZIP file to a package name.
+     *
+     * @throws InvalidModuleDescriptorException if the name is a class file in
+     *         the top-level directory of the JAR/ZIP file (and it's not
+     *         module-info.class)
+     */
+    private Optional<String> toPackageName(String name) {
+        assert !name.endsWith("/");
+        int index = name.lastIndexOf("/");
+        if (index == -1) {
+            if (name.endsWith(".class") && !name.equals(MODULE_INFO)) {
+                String msg = name + " found in top-level directory"
+                             + " (unnamed package not allowed in module)";
+                throw new InvalidModuleDescriptorException(msg);
+            }
+            return Optional.empty();
+        }
+
+        String pn = name.substring(0, index).replace('/', '.');
+        if (Checks.isPackageName(pn)) {
+            return Optional.of(pn);
+        } else {
+            // not a valid package name
+            return Optional.empty();
+        }
+    }
+
+    /**
+     * Maps the relative path of an entry in an exploded module to a package
+     * name.
+     *
+     * @throws InvalidModuleDescriptorException if the name is a class file in
+     *         the top-level directory (and it's not module-info.class)
+     */
+    private Optional<String> toPackageName(Path file, String separator) {
+        assert file.getRoot() == null;
+
+        Path parent = file.getParent();
+        if (parent == null) {
+            String name = file.toString();
+            if (name.endsWith(".class") && !name.equals(MODULE_INFO)) {
+                String msg = name + " found in top-level directory"
+                             + " (unnamed package not allowed in module)";
+                throw new InvalidModuleDescriptorException(msg);
+            }
+            return Optional.empty();
+        }
+
+        String pn = parent.toString().replace(separator, ".");
+        if (Checks.isPackageName(pn)) {
+            return Optional.of(pn);
+        } else {
+            // not a valid package name
+            return Optional.empty();
+        }
+    }
+
+    /**
+     * Returns true if the given file exists and is a hidden file
+     */
+    private boolean isHidden(Path file) {
+        try {
+            return Files.isHidden(file);
+        } catch (IOException ioe) {
+            return false;
+        }
+    }
+
+
+    /**
+     * Return true if a path locates a path in the default file system
+     */
+    private boolean isDefaultFileSystem(Path path) {
+        return path.getFileSystem().provider()
+                .getScheme().equalsIgnoreCase("file");
+    }
+
+
+    private static final PerfCounter scanTime
+        = PerfCounter.newPerfCounter("jdk.module.finder.modulepath.scanTime");
+    private static final PerfCounter moduleCount
+        = PerfCounter.newPerfCounter("jdk.module.finder.modulepath.modules");
+}
diff --git a/tests/test_data/std/jdk/internal/module/ModulePathValidator.class b/tests/test_data/std/jdk/internal/module/ModulePathValidator.class
new file mode 100644
index 0000000000000000000000000000000000000000..ef756a91c48df35853185cce66be16d2442cf20b
GIT binary patch
literal 9040
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/module/ModulePathValidator.java b/tests/test_data/std/jdk/internal/module/ModulePathValidator.java
new file mode 100644
index 00000000..cea54ce4
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/module/ModulePathValidator.java
@@ -0,0 +1,254 @@
+/*
+ * Copyright (c) 2018, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package jdk.internal.module;
+
+import java.io.File;
+import java.io.IOException;
+import java.io.PrintStream;
+import java.lang.module.FindException;
+import java.lang.module.ModuleDescriptor;
+import java.lang.module.ModuleFinder;
+import java.lang.module.ModuleReference;
+import java.net.URI;
+import java.nio.file.DirectoryStream;
+import java.nio.file.Files;
+import java.nio.file.NoSuchFileException;
+import java.nio.file.Path;
+import java.nio.file.attribute.BasicFileAttributes;
+import java.util.Comparator;
+import java.util.HashMap;
+import java.util.Map;
+import java.util.Optional;
+import java.util.stream.Stream;
+
+/**
+ * A validator to check for errors and conflicts between modules.
+ */
+
+class ModulePathValidator {
+    private static final String MODULE_INFO = "module-info.class";
+    private static final String INDENT = "    ";
+
+    private final Map<String, ModuleReference> nameToModule;
+    private final Map<String, ModuleReference> packageToModule;
+    private final PrintStream out;
+
+    private int errorCount;
+
+    private ModulePathValidator(PrintStream out) {
+        this.nameToModule = new HashMap<>();
+        this.packageToModule = new HashMap<>();
+        this.out = out;
+    }
+
+    /**
+     * Scans and the validates all modules on the module path. The module path
+     * comprises the upgrade module path, system modules, and the application
+     * module path.
+     *
+     * @param out the print stream for output messages
+     * @return the number of errors found
+     */
+    static int scanAllModules(PrintStream out) {
+        ModulePathValidator validator = new ModulePathValidator(out);
+
+        // upgrade module path
+        String value = System.getProperty("jdk.module.upgrade.path");
+        if (value != null) {
+            Stream.of(value.split(File.pathSeparator))
+                    .map(Path::of)
+                    .forEach(validator::scan);
+        }
+
+        // system modules
+        ModuleFinder.ofSystem().findAll().stream()
+                .sorted(Comparator.comparing(ModuleReference::descriptor))
+                .forEach(validator::process);
+
+        // application module path
+        value = System.getProperty("jdk.module.path");
+        if (value != null) {
+            Stream.of(value.split(File.pathSeparator))
+                    .map(Path::of)
+                    .forEach(validator::scan);
+        }
+
+        return validator.errorCount;
+    }
+
+    /**
+     * Prints the module location and name.
+     */
+    private void printModule(ModuleReference mref) {
+        mref.location()
+                .filter(uri -> !isJrt(uri))
+                .ifPresent(uri -> out.print(uri + " "));
+        ModuleDescriptor descriptor = mref.descriptor();
+        out.print(descriptor.name());
+        if (descriptor.isAutomatic())
+            out.print(" automatic");
+        out.println();
+    }
+
+    /**
+     * Prints the module location and name, checks if the module is
+     * shadowed by a previously seen module, and finally checks for
+     * package conflicts with previously seen modules.
+     */
+    private void process(ModuleReference mref) {
+        String name = mref.descriptor().name();
+        ModuleReference previous = nameToModule.putIfAbsent(name, mref);
+        if (previous != null) {
+            printModule(mref);
+            out.print(INDENT + "shadowed by ");
+            printModule(previous);
+        } else {
+            boolean first = true;
+
+            // check for package conflicts when not shadowed
+            for (String pkg :  mref.descriptor().packages()) {
+                previous = packageToModule.putIfAbsent(pkg, mref);
+                if (previous != null) {
+                    if (first) {
+                        printModule(mref);
+                        first = false;
+                        errorCount++;
+                    }
+                    String mn = previous.descriptor().name();
+                    out.println(INDENT + "contains " + pkg
+                            + " conflicts with module " + mn);
+                }
+            }
+        }
+    }
+
+    /**
+     * Scan an element on a module path. The element is a directory
+     * of modules, an exploded module, or a JAR file.
+     */
+    private void scan(Path entry) {
+        BasicFileAttributes attrs;
+        try {
+            attrs = Files.readAttributes(entry, BasicFileAttributes.class);
+        } catch (NoSuchFileException ignore) {
+            return;
+        } catch (IOException ioe) {
+            out.println(entry + " " + ioe);
+            errorCount++;
+            return;
+        }
+
+        String fn = entry.getFileName().toString();
+        if (attrs.isRegularFile() && fn.endsWith(".jar")) {
+            // JAR file, explicit or automatic module
+            scanModule(entry).ifPresent(this::process);
+        } else if (attrs.isDirectory()) {
+            Path mi = entry.resolve(MODULE_INFO);
+            if (Files.exists(mi)) {
+                // exploded module
+                scanModule(entry).ifPresent(this::process);
+            } else {
+                // directory of modules
+                scanDirectory(entry);
+            }
+        }
+    }
+
+    /**
+     * Scan the JAR files and exploded modules in a directory.
+     */
+    private void scanDirectory(Path dir) {
+        try (DirectoryStream<Path> stream = Files.newDirectoryStream(dir)) {
+            Map<String, Path> moduleToEntry = new HashMap<>();
+
+            for (Path entry : stream) {
+                BasicFileAttributes attrs;
+                try {
+                    attrs = Files.readAttributes(entry, BasicFileAttributes.class);
+                } catch (IOException ioe) {
+                    out.println(entry + " " + ioe);
+                    errorCount++;
+                    continue;
+                }
+
+                ModuleReference mref = null;
+
+                String fn = entry.getFileName().toString();
+                if (attrs.isRegularFile() && fn.endsWith(".jar")) {
+                    mref = scanModule(entry).orElse(null);
+                } else if (attrs.isDirectory()) {
+                    Path mi = entry.resolve(MODULE_INFO);
+                    if (Files.exists(mi)) {
+                        mref = scanModule(entry).orElse(null);
+                    }
+                }
+
+                if (mref != null) {
+                    String name = mref.descriptor().name();
+                    Path previous = moduleToEntry.putIfAbsent(name, entry);
+                    if (previous != null) {
+                        // same name as other module in the directory
+                        printModule(mref);
+                        out.println(INDENT + "contains same module as "
+                                + previous.getFileName());
+                        errorCount++;
+                    } else {
+                        process(mref);
+                    }
+                }
+            }
+        } catch (IOException ioe) {
+            out.println(dir + " " + ioe);
+            errorCount++;
+        }
+    }
+
+    /**
+     * Scan a JAR file or exploded module.
+     */
+    private Optional<ModuleReference> scanModule(Path entry) {
+        ModuleFinder finder = ModuleFinder.of(entry);
+        try {
+            return finder.findAll().stream().findFirst();
+        } catch (FindException e) {
+            out.println(entry);
+            out.println(INDENT + e.getMessage());
+            Throwable cause = e.getCause();
+            if (cause != null) {
+                out.println(INDENT + cause);
+            }
+            errorCount++;
+            return Optional.empty();
+        }
+    }
+
+    /**
+     * Returns true if the given URI is a jrt URI
+     */
+    private static boolean isJrt(URI uri) {
+        return (uri != null && uri.getScheme().equalsIgnoreCase("jrt"));
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/module/ModuleReferenceImpl$CachedHash.class b/tests/test_data/std/jdk/internal/module/ModuleReferenceImpl$CachedHash.class
new file mode 100644
index 0000000000000000000000000000000000000000..9ca31f4c50ec867250d369e105553947241baf02
GIT binary patch
literal 1735
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diff --git a/tests/test_data/std/jdk/internal/module/ModuleReferenceImpl.class b/tests/test_data/std/jdk/internal/module/ModuleReferenceImpl.class
new file mode 100644
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GIT binary patch
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/module/ModuleReferenceImpl.java b/tests/test_data/std/jdk/internal/module/ModuleReferenceImpl.java
new file mode 100644
index 00000000..e460b0fc
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/module/ModuleReferenceImpl.java
@@ -0,0 +1,200 @@
+/*
+ * Copyright (c) 2016, 2022, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package jdk.internal.module;
+
+import java.io.IOException;
+import java.io.UncheckedIOException;
+import java.lang.module.ModuleDescriptor;
+import java.lang.module.ModuleReader;
+import java.lang.module.ModuleReference;
+import java.net.URI;
+import java.util.Objects;
+import java.util.function.Supplier;
+
+/**
+ * A ModuleReference implementation that supports referencing a module that
+ * is patched and/or can be tied to other modules by means of hashes.
+ */
+
+public class ModuleReferenceImpl extends ModuleReference {
+
+    // location of module
+    private final URI location;
+
+    // the module reader
+    private final Supplier<ModuleReader> readerSupplier;
+
+    // non-null if the module is patched
+    private final ModulePatcher patcher;
+
+    // ModuleTarget if the module is OS/architecture specific
+    private final ModuleTarget target;
+
+    // the hashes of other modules recorded in this module
+    private final ModuleHashes recordedHashes;
+
+    // the function that computes the hash of this module
+    private final ModuleHashes.HashSupplier hasher;
+
+    // ModuleResolution flags
+    private final ModuleResolution moduleResolution;
+
+    // Single-slot cache of this module's hash to avoid needing to compute
+    // it many times. For correctness under concurrent updates, we need to
+    // wrap the fields updated at the same time with a record.
+    private record CachedHash(byte[] hash, String algorithm) {}
+    private CachedHash cachedHash;
+
+    /**
+     * Constructs a new instance of this class.
+     */
+    public ModuleReferenceImpl(ModuleDescriptor descriptor,
+                               URI location,
+                               Supplier<ModuleReader> readerSupplier,
+                               ModulePatcher patcher,
+                               ModuleTarget target,
+                               ModuleHashes recordedHashes,
+                               ModuleHashes.HashSupplier hasher,
+                               ModuleResolution moduleResolution)
+    {
+        super(descriptor, Objects.requireNonNull(location));
+        this.location = location;
+        this.readerSupplier = readerSupplier;
+        this.patcher = patcher;
+        this.target = target;
+        this.recordedHashes = recordedHashes;
+        this.hasher = hasher;
+        this.moduleResolution = moduleResolution;
+    }
+
+    @Override
+    public ModuleReader open() throws IOException {
+        try {
+            return readerSupplier.get();
+        } catch (UncheckedIOException e) {
+            throw e.getCause();
+        }
+    }
+
+    /**
+     * Returns {@code true} if this module has been patched via --patch-module.
+     */
+    public boolean isPatched() {
+        return (patcher != null);
+    }
+
+    /**
+     * Returns the ModuleTarget or {@code null} if the no target platform.
+     */
+    public ModuleTarget moduleTarget() {
+        return target;
+    }
+
+    /**
+     * Returns the hashes recorded in this module or {@code null} if there
+     * are no hashes recorded.
+     */
+    public ModuleHashes recordedHashes() {
+        return recordedHashes;
+    }
+
+    /**
+     * Returns the supplier that computes the hash of this module.
+     */
+    ModuleHashes.HashSupplier hasher() {
+        return hasher;
+    }
+
+    /**
+     * Returns the ModuleResolution flags.
+     */
+    public ModuleResolution moduleResolution() {
+        return moduleResolution;
+    }
+
+    /**
+     * Computes the hash of this module. Returns {@code null} if the hash
+     * cannot be computed.
+     *
+     * @throws java.io.UncheckedIOException if an I/O error occurs
+     */
+    public byte[] computeHash(String algorithm) {
+        CachedHash ch = cachedHash;
+        if (ch != null && ch.algorithm().equals(algorithm)) {
+            return ch.hash();
+        }
+
+        if (hasher == null) {
+            return null;
+        }
+        byte[] hash = hasher.generate(algorithm);
+        cachedHash = new CachedHash(hash, algorithm);
+        return hash;
+    }
+
+    @Override
+    public int hashCode() {
+        int hc = hash;
+        if (hc == 0) {
+            hc = descriptor().hashCode();
+            hc = 43 * hc + Objects.hashCode(location);
+            hc = 43 * hc + Objects.hashCode(patcher);
+            if (hc == 0)
+                hc = -1;
+            hash = hc;
+        }
+        return hc;
+    }
+
+    private int hash;
+
+    @Override
+    public boolean equals(Object ob) {
+        if (!(ob instanceof ModuleReferenceImpl))
+            return false;
+        ModuleReferenceImpl that = (ModuleReferenceImpl)ob;
+
+        // assume module content, recorded hashes, etc. are the same
+        // when the modules have equal module descriptors, are at the
+        // same location, and are patched by the same patcher.
+        return Objects.equals(this.descriptor(), that.descriptor())
+                && Objects.equals(this.location, that.location)
+                && Objects.equals(this.patcher, that.patcher);
+    }
+
+    @Override
+    public String toString() {
+        StringBuilder sb = new StringBuilder();
+        sb.append("[module ");
+        sb.append(descriptor().name());
+        sb.append(", location=");
+        sb.append(location);
+        if (isPatched()) sb.append(" (patched)");
+        sb.append("]");
+        return sb.toString();
+    }
+
+}
diff --git a/tests/test_data/std/jdk/internal/module/ModuleReferences$ExplodedModuleReader.class b/tests/test_data/std/jdk/internal/module/ModuleReferences$ExplodedModuleReader.class
new file mode 100644
index 0000000000000000000000000000000000000000..f2a9e180bf8aa73b60d2040732d2f0dff03c5c21
GIT binary patch
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/module/ModuleReferences$JModModuleReader.class b/tests/test_data/std/jdk/internal/module/ModuleReferences$JModModuleReader.class
new file mode 100644
index 0000000000000000000000000000000000000000..7ad82d66e90f94c8a219309e41b4116f96504da2
GIT binary patch
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diff --git a/tests/test_data/std/jdk/internal/module/ModuleReferences$JarModuleReader.class b/tests/test_data/std/jdk/internal/module/ModuleReferences$JarModuleReader.class
new file mode 100644
index 0000000000000000000000000000000000000000..6d0e3e881d2884be536f3ea4e2d8b481a2eb9025
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diff --git a/tests/test_data/std/jdk/internal/module/ModuleReferences$SafeCloseModuleReader.class b/tests/test_data/std/jdk/internal/module/ModuleReferences$SafeCloseModuleReader.class
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diff --git a/tests/test_data/std/jdk/internal/module/ModuleReferences.class b/tests/test_data/std/jdk/internal/module/ModuleReferences.class
new file mode 100644
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/module/ModuleReferences.java b/tests/test_data/std/jdk/internal/module/ModuleReferences.java
new file mode 100644
index 00000000..346838b4
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/module/ModuleReferences.java
@@ -0,0 +1,430 @@
+/*
+ * Copyright (c) 2015, 2021, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package jdk.internal.module;
+
+import java.io.File;
+import java.io.IOError;
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.UncheckedIOException;
+import java.lang.module.ModuleReader;
+import java.lang.module.ModuleReference;
+import java.net.URI;
+import java.nio.ByteBuffer;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.util.List;
+import java.util.Objects;
+import java.util.Optional;
+import java.util.concurrent.locks.Lock;
+import java.util.concurrent.locks.ReadWriteLock;
+import java.util.concurrent.locks.ReentrantReadWriteLock;
+import java.util.function.Supplier;
+import java.util.jar.JarEntry;
+import java.util.jar.JarFile;
+import java.util.stream.Stream;
+import java.util.zip.ZipFile;
+
+import jdk.internal.jmod.JmodFile;
+import jdk.internal.module.ModuleHashes.HashSupplier;
+import sun.net.www.ParseUtil;
+
+
+/**
+ * A factory for creating ModuleReference implementations where the modules are
+ * packaged as modular JAR file, JMOD files or where the modules are exploded
+ * on the file system.
+ */
+
+class ModuleReferences {
+    private ModuleReferences() { }
+
+    /**
+     * Creates a ModuleReference to a possibly-patched module
+     */
+    private static ModuleReference newModule(ModuleInfo.Attributes attrs,
+                                             URI uri,
+                                             Supplier<ModuleReader> supplier,
+                                             ModulePatcher patcher,
+                                             HashSupplier hasher) {
+        ModuleReference mref = new ModuleReferenceImpl(attrs.descriptor(),
+                                                       uri,
+                                                       supplier,
+                                                       null,
+                                                       attrs.target(),
+                                                       attrs.recordedHashes(),
+                                                       hasher,
+                                                       attrs.moduleResolution());
+        if (patcher != null)
+            mref = patcher.patchIfNeeded(mref);
+
+        return mref;
+    }
+
+    /**
+     * Creates a ModuleReference to a possibly-patched module in a modular JAR.
+     */
+    static ModuleReference newJarModule(ModuleInfo.Attributes attrs,
+                                        ModulePatcher patcher,
+                                        Path file) {
+        URI uri = file.toUri();
+        Supplier<ModuleReader> supplier = () -> new JarModuleReader(file, uri);
+        HashSupplier hasher = (a) -> ModuleHashes.computeHash(supplier, a);
+        return newModule(attrs, uri, supplier, patcher, hasher);
+    }
+
+    /**
+     * Creates a ModuleReference to a module in a JMOD file.
+     */
+    static ModuleReference newJModModule(ModuleInfo.Attributes attrs, Path file) {
+        URI uri = file.toUri();
+        Supplier<ModuleReader> supplier = () -> new JModModuleReader(file, uri);
+        HashSupplier hasher = (a) -> ModuleHashes.computeHash(supplier, a);
+        return newModule(attrs, uri, supplier, null, hasher);
+    }
+
+    /**
+     * Creates a ModuleReference to a possibly-patched exploded module.
+     */
+    static ModuleReference newExplodedModule(ModuleInfo.Attributes attrs,
+                                             ModulePatcher patcher,
+                                             Path dir) {
+        Supplier<ModuleReader> supplier = () -> new ExplodedModuleReader(dir);
+        return newModule(attrs, dir.toUri(), supplier, patcher, null);
+    }
+
+
+    /**
+     * A base module reader that encapsulates machinery required to close the
+     * module reader safely.
+     */
+    abstract static class SafeCloseModuleReader implements ModuleReader {
+
+        // RW lock to support safe close
+        private final ReadWriteLock lock = new ReentrantReadWriteLock();
+        private final Lock readLock = lock.readLock();
+        private final Lock writeLock = lock.writeLock();
+        private boolean closed;
+
+        SafeCloseModuleReader() { }
+
+        /**
+         * Returns a URL to  resource. This method is invoked by the find
+         * method to do the actual work of finding the resource.
+         */
+        abstract Optional<URI> implFind(String name) throws IOException;
+
+        /**
+         * Returns an input stream for reading a resource. This method is
+         * invoked by the open method to do the actual work of opening
+         * an input stream to the resource.
+         */
+        abstract Optional<InputStream> implOpen(String name) throws IOException;
+
+        /**
+         * Returns a stream of the names of resources in the module. This
+         * method is invoked by the list method to do the actual work of
+         * creating the stream.
+         */
+        abstract Stream<String> implList() throws IOException;
+
+        /**
+         * Closes the module reader. This method is invoked by close to do the
+         * actual work of closing the module reader.
+         */
+        abstract void implClose() throws IOException;
+
+        @Override
+        public final Optional<URI> find(String name) throws IOException {
+            readLock.lock();
+            try {
+                if (!closed) {
+                    return implFind(name);
+                } else {
+                    throw new IOException("ModuleReader is closed");
+                }
+            } finally {
+                readLock.unlock();
+            }
+        }
+
+
+        @Override
+        public final Optional<InputStream> open(String name) throws IOException {
+            readLock.lock();
+            try {
+                if (!closed) {
+                    return implOpen(name);
+                } else {
+                    throw new IOException("ModuleReader is closed");
+                }
+            } finally {
+                readLock.unlock();
+            }
+        }
+
+        @Override
+        public final Stream<String> list() throws IOException {
+            readLock.lock();
+            try {
+                if (!closed) {
+                    return implList();
+                } else {
+                    throw new IOException("ModuleReader is closed");
+                }
+            } finally {
+                readLock.unlock();
+            }
+        }
+
+        @Override
+        public final void close() throws IOException {
+            writeLock.lock();
+            try {
+                if (!closed) {
+                    closed = true;
+                    implClose();
+                }
+            } finally {
+                writeLock.unlock();
+            }
+        }
+    }
+
+
+    /**
+     * A ModuleReader for a modular JAR file.
+     */
+    static class JarModuleReader extends SafeCloseModuleReader {
+        private final JarFile jf;
+        private final URI uri;
+
+        static JarFile newJarFile(Path path) {
+            try {
+                return new JarFile(new File(path.toString()),
+                                   true,                       // verify
+                                   ZipFile.OPEN_READ,
+                                   JarFile.runtimeVersion());
+            } catch (IOException ioe) {
+                throw new UncheckedIOException(ioe);
+            }
+        }
+
+        JarModuleReader(Path path, URI uri) {
+            this.jf = newJarFile(path);
+            this.uri = uri;
+        }
+
+        private JarEntry getEntry(String name) {
+            return jf.getJarEntry(Objects.requireNonNull(name));
+        }
+
+        @Override
+        Optional<URI> implFind(String name) throws IOException {
+            JarEntry je = getEntry(name);
+            if (je != null) {
+                if (jf.isMultiRelease())
+                    name = je.getRealName();
+                if (je.isDirectory() && !name.endsWith("/"))
+                    name += "/";
+                String encodedPath = ParseUtil.encodePath(name, false);
+                String uris = "jar:" + uri + "!/" + encodedPath;
+                return Optional.of(URI.create(uris));
+            } else {
+                return Optional.empty();
+            }
+        }
+
+        @Override
+        Optional<InputStream> implOpen(String name) throws IOException {
+            JarEntry je = getEntry(name);
+            if (je != null) {
+                return Optional.of(jf.getInputStream(je));
+            } else {
+                return Optional.empty();
+            }
+        }
+
+        @Override
+        Stream<String> implList() throws IOException {
+            // take snapshot to avoid async close
+            List<String> names = jf.versionedStream()
+                    .map(JarEntry::getName)
+                    .toList();
+            return names.stream();
+        }
+
+        @Override
+        void implClose() throws IOException {
+            jf.close();
+        }
+    }
+
+
+    /**
+     * A ModuleReader for a JMOD file.
+     */
+    static class JModModuleReader extends SafeCloseModuleReader {
+        private final JmodFile jf;
+        private final URI uri;
+
+        static JmodFile newJmodFile(Path path) {
+            try {
+                return new JmodFile(path);
+            } catch (IOException ioe) {
+                throw new UncheckedIOException(ioe);
+            }
+        }
+
+        JModModuleReader(Path path, URI uri) {
+            this.jf = newJmodFile(path);
+            this.uri = uri;
+        }
+
+        private JmodFile.Entry getEntry(String name) {
+            Objects.requireNonNull(name);
+            return jf.getEntry(JmodFile.Section.CLASSES, name);
+        }
+
+        @Override
+        Optional<URI> implFind(String name) {
+            JmodFile.Entry je = getEntry(name);
+            if (je != null) {
+                if (je.isDirectory() && !name.endsWith("/"))
+                    name += "/";
+                String encodedPath = ParseUtil.encodePath(name, false);
+                String uris = "jmod:" + uri + "!/" + encodedPath;
+                return Optional.of(URI.create(uris));
+            } else {
+                return Optional.empty();
+            }
+        }
+
+        @Override
+        Optional<InputStream> implOpen(String name) throws IOException {
+            JmodFile.Entry je = getEntry(name);
+            if (je != null) {
+                return Optional.of(jf.getInputStream(je));
+            } else {
+                return Optional.empty();
+            }
+        }
+
+        @Override
+        Stream<String> implList() throws IOException {
+            // take snapshot to avoid async close
+            List<String> names = jf.stream()
+                    .filter(e -> e.section() == JmodFile.Section.CLASSES)
+                    .map(JmodFile.Entry::name)
+                    .toList();
+            return names.stream();
+        }
+
+        @Override
+        void implClose() throws IOException {
+            jf.close();
+        }
+    }
+
+
+    /**
+     * A ModuleReader for an exploded module.
+     */
+    static class ExplodedModuleReader implements ModuleReader {
+        private final Path dir;
+        private volatile boolean closed;
+
+        ExplodedModuleReader(Path dir) {
+            this.dir = dir;
+
+            // when running with a security manager then check that the caller
+            // has access to the directory.
+            @SuppressWarnings("removal")
+            SecurityManager sm = System.getSecurityManager();
+            if (sm != null) {
+                boolean unused = Files.isDirectory(dir);
+            }
+        }
+
+        /**
+         * Throws IOException if the module reader is closed;
+         */
+        private void ensureOpen() throws IOException {
+            if (closed) throw new IOException("ModuleReader is closed");
+        }
+
+        @Override
+        public Optional<URI> find(String name) throws IOException {
+            ensureOpen();
+            Path path = Resources.toFilePath(dir, name);
+            if (path != null) {
+                try {
+                    return Optional.of(path.toUri());
+                } catch (IOError e) {
+                    throw (IOException) e.getCause();
+                }
+            } else {
+                return Optional.empty();
+            }
+        }
+
+        @Override
+        public Optional<InputStream> open(String name) throws IOException {
+            ensureOpen();
+            Path path = Resources.toFilePath(dir, name);
+            if (path != null) {
+                return Optional.of(Files.newInputStream(path));
+            } else {
+                return Optional.empty();
+            }
+        }
+
+        @Override
+        public Optional<ByteBuffer> read(String name) throws IOException {
+            ensureOpen();
+            Path path = Resources.toFilePath(dir, name);
+            if (path != null) {
+                return Optional.of(ByteBuffer.wrap(Files.readAllBytes(path)));
+            } else {
+                return Optional.empty();
+            }
+        }
+
+        @Override
+        public Stream<String> list() throws IOException {
+            ensureOpen();
+            return Files.walk(dir, Integer.MAX_VALUE)
+                        .map(f -> Resources.toResourceName(dir, f))
+                        .filter(s -> s.length() > 0);
+        }
+
+        @Override
+        public void close() {
+            closed = true;
+        }
+    }
+
+}
diff --git a/tests/test_data/std/jdk/internal/module/ModuleResolution.class b/tests/test_data/std/jdk/internal/module/ModuleResolution.class
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diff --git a/tests/test_data/std/jdk/internal/module/ModuleResolution.java b/tests/test_data/std/jdk/internal/module/ModuleResolution.java
new file mode 100644
index 00000000..d8b9d960
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/module/ModuleResolution.java
@@ -0,0 +1,113 @@
+/*
+ * Copyright (c) 2016, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package jdk.internal.module;
+
+import java.lang.module.ModuleReference;
+import static jdk.internal.module.ClassFileConstants.*;
+
+/**
+ * Represents the Module Resolution flags.
+ */
+public final class ModuleResolution {
+
+    final int value;
+
+    ModuleResolution(int value) {
+        this.value = value;
+    }
+
+    public int value() {
+        return value;
+    }
+
+    public static ModuleResolution empty() {
+        return new ModuleResolution(0);
+    }
+
+    public boolean doNotResolveByDefault() {
+        return (value & DO_NOT_RESOLVE_BY_DEFAULT) != 0;
+    }
+
+    public boolean hasDeprecatedWarning() {
+        return (value & WARN_DEPRECATED) != 0;
+    }
+
+    public boolean hasDeprecatedForRemovalWarning() {
+        return (value & WARN_DEPRECATED_FOR_REMOVAL) != 0;
+    }
+
+    public boolean hasIncubatingWarning() {
+        return (value & WARN_INCUBATING) != 0;
+    }
+
+    public ModuleResolution withDoNotResolveByDefault() {
+        return new ModuleResolution(value | DO_NOT_RESOLVE_BY_DEFAULT);
+    }
+
+    public ModuleResolution withDeprecated() {
+        if ((value & (WARN_DEPRECATED_FOR_REMOVAL | WARN_INCUBATING)) != 0)
+            throw new InternalError("cannot add deprecated to " + value);
+        return new ModuleResolution(value | WARN_DEPRECATED);
+    }
+
+    public ModuleResolution withDeprecatedForRemoval() {
+        if ((value & (WARN_DEPRECATED | WARN_INCUBATING)) != 0)
+            throw new InternalError("cannot add deprecated for removal to " + value);
+        return new ModuleResolution(value | WARN_DEPRECATED_FOR_REMOVAL);
+    }
+
+    public ModuleResolution withIncubating() {
+        if ((value & (WARN_DEPRECATED | WARN_DEPRECATED_FOR_REMOVAL)) != 0)
+            throw new InternalError("cannot add incubating to " + value);
+        return new ModuleResolution(value | WARN_INCUBATING);
+    }
+
+    public static boolean doNotResolveByDefault(ModuleReference mref) {
+        // get the DO_NOT_RESOLVE_BY_DEFAULT flag, if any
+        if (mref instanceof ModuleReferenceImpl) {
+            ModuleResolution mres = ((ModuleReferenceImpl) mref).moduleResolution();
+            if (mres != null)
+                return mres.doNotResolveByDefault();
+        }
+
+        return false;
+    }
+
+    public static boolean hasIncubatingWarning(ModuleReference mref) {
+        if (mref instanceof ModuleReferenceImpl) {
+            ModuleResolution mres = ((ModuleReferenceImpl) mref).moduleResolution();
+            if (mres != null)
+                return mres.hasIncubatingWarning();
+        }
+
+        return false;
+    }
+
+    @Override
+    public String toString() {
+        return super.toString() + "[value=" + value + "]";
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/module/ModuleTarget.class b/tests/test_data/std/jdk/internal/module/ModuleTarget.class
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diff --git a/tests/test_data/std/jdk/internal/module/ModuleTarget.java b/tests/test_data/std/jdk/internal/module/ModuleTarget.java
new file mode 100644
index 00000000..ffd50704
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/module/ModuleTarget.java
@@ -0,0 +1,45 @@
+/*
+ * Copyright (c) 2017, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package jdk.internal.module;
+
+/**
+ * Represents the module target.
+ *
+ * For now, this is a single value for the target platform, e.g. "linux-x64".
+ */
+public final class ModuleTarget {
+
+    private final String targetPlatform;
+
+    public ModuleTarget(String targetPlatform) {
+        this.targetPlatform = targetPlatform;
+    }
+
+    public String targetPlatform() {
+        return targetPlatform;
+    }
+
+}
diff --git a/tests/test_data/std/jdk/internal/module/Modules.class b/tests/test_data/std/jdk/internal/module/Modules.class
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diff --git a/tests/test_data/std/jdk/internal/module/Modules.java b/tests/test_data/std/jdk/internal/module/Modules.java
new file mode 100644
index 00000000..be3f8b63
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/module/Modules.java
@@ -0,0 +1,301 @@
+/*
+ * Copyright (c) 2015, 2023, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package jdk.internal.module;
+
+import java.io.PrintStream;
+import java.lang.module.Configuration;
+import java.lang.module.ModuleDescriptor;
+import java.lang.module.ModuleFinder;
+import java.lang.module.ModuleReference;
+import java.lang.module.ResolvedModule;
+import java.net.URI;
+import java.security.AccessController;
+import java.security.PrivilegedAction;
+import java.util.Collection;
+import java.util.List;
+import java.util.Map;
+import java.util.Optional;
+import java.util.Set;
+import java.util.function.Function;
+import java.util.stream.Collectors;
+
+import jdk.internal.access.JavaLangModuleAccess;
+import jdk.internal.loader.BootLoader;
+import jdk.internal.loader.BuiltinClassLoader;
+import jdk.internal.loader.ClassLoaders;
+import jdk.internal.access.JavaLangAccess;
+import jdk.internal.access.SharedSecrets;
+
+/**
+ * A helper class for creating and updating modules. This class is intended to
+ * support command-line options, tests, and the instrumentation API. It is also
+ * used by the VM to load modules or add read edges when agents are instrumenting
+ * code that need to link to supporting classes.
+ *
+ * The parameters that are package names in this API are the fully-qualified
+ * names of the packages as defined in section 6.5.3 of <cite>The Java
+ * Language Specification </cite>, for example, {@code "java.lang"}.
+ */
+
+public class Modules {
+    private Modules() { }
+
+    private static final JavaLangAccess JLA = SharedSecrets.getJavaLangAccess();
+    private static final JavaLangModuleAccess JLMA = SharedSecrets.getJavaLangModuleAccess();
+
+    /**
+     * Creates a new Module. The module has the given ModuleDescriptor and
+     * is defined to the given class loader.
+     *
+     * The resulting Module is in a larval state in that it does not read
+     * any other module and does not have any exports.
+     *
+     * The URI is for information purposes only.
+     */
+    public static Module defineModule(ClassLoader loader,
+                                      ModuleDescriptor descriptor,
+                                      URI uri)
+    {
+        return JLA.defineModule(loader, descriptor, uri);
+    }
+
+    /**
+     * Updates m1 to read m2.
+     * Same as m1.addReads(m2) but without a caller check.
+     */
+    public static void addReads(Module m1, Module m2) {
+        JLA.addReads(m1, m2);
+    }
+
+    /**
+     * Update module m to read all unnamed modules.
+     */
+    public static void addReadsAllUnnamed(Module m) {
+        JLA.addReadsAllUnnamed(m);
+    }
+
+    /**
+     * Updates module m1 to export a package to module m2.
+     * Same as m1.addExports(pn, m2) but without a caller check
+     */
+    public static void addExports(Module m1, String pn, Module m2) {
+        JLA.addExports(m1, pn, m2);
+    }
+
+    /**
+     * Updates module m to export a package unconditionally.
+     */
+    public static void addExports(Module m, String pn) {
+        JLA.addExports(m, pn);
+    }
+
+    /**
+     * Updates module m to export a package to all unnamed modules.
+     */
+    public static void addExportsToAllUnnamed(Module m, String pn) {
+        JLA.addExportsToAllUnnamed(m, pn);
+    }
+
+    /**
+     * Updates module m1 to open a package to module m2.
+     * Same as m1.addOpens(pn, m2) but without a caller check.
+     */
+    public static void addOpens(Module m1, String pn, Module m2) {
+        JLA.addOpens(m1, pn, m2);
+    }
+
+    /**
+     * Updates module m to open a package to all unnamed modules.
+     */
+    public static void addOpensToAllUnnamed(Module m, String pn) {
+        JLA.addOpensToAllUnnamed(m, pn);
+    }
+
+    /**
+     * Adds native access to all unnamed modules.
+     */
+    public static void addEnableNativeAccessToAllUnnamed() {
+        JLA.addEnableNativeAccessToAllUnnamed();
+    }
+
+    /**
+     * Updates module m to use a service.
+     * Same as m2.addUses(service) but without a caller check.
+     */
+    public static void addUses(Module m, Class<?> service) {
+        JLA.addUses(m, service);
+    }
+
+    /**
+     * Updates module m to provide a service
+     */
+    public static void addProvides(Module m, Class<?> service, Class<?> impl) {
+        ModuleLayer layer = m.getLayer();
+
+        PrivilegedAction<ClassLoader> pa = m::getClassLoader;
+        @SuppressWarnings("removal")
+        ClassLoader loader = AccessController.doPrivileged(pa);
+
+        ClassLoader platformClassLoader = ClassLoaders.platformClassLoader();
+        if (layer == null || loader == null || loader == platformClassLoader) {
+            // update ClassLoader catalog
+            ServicesCatalog catalog;
+            if (loader == null) {
+                catalog = BootLoader.getServicesCatalog();
+            } else {
+                catalog = ServicesCatalog.getServicesCatalog(loader);
+            }
+            catalog.addProvider(m, service, impl);
+        }
+
+        if (layer != null) {
+            // update Layer catalog
+            JLA.getServicesCatalog(layer).addProvider(m, service, impl);
+        }
+    }
+
+    /**
+     * Resolves a collection of root modules, with service binding and the empty
+     * Configuration as the parent to create a Configuration for the boot layer.
+     *
+     * This method is intended to be used to create the Configuration for the
+     * boot layer during startup or at a link-time.
+     */
+    public static Configuration newBootLayerConfiguration(ModuleFinder finder,
+                                                          Collection<String> roots,
+                                                          PrintStream traceOutput)
+    {
+        return JLMA.resolveAndBind(finder, roots, traceOutput);
+    }
+
+    /**
+     * Called by the VM when code in the given Module has been transformed by
+     * an agent and so may have been instrumented to call into supporting
+     * classes on the boot class path or application class path.
+     */
+    public static void transformedByAgent(Module m) {
+        addReads(m, BootLoader.getUnnamedModule());
+        addReads(m, ClassLoaders.appClassLoader().getUnnamedModule());
+    }
+
+    /**
+     * Called by the VM to load a system module, typically "java.instrument" or
+     * "jdk.management.agent". If the module is not loaded then it is resolved
+     * and loaded (along with any dependences that weren't previously loaded)
+     * into a child layer.
+     */
+    public static synchronized Module loadModule(String name) {
+        ModuleLayer top = topLayer;
+        if (top == null)
+            top = ModuleLayer.boot();
+
+        Module module = top.findModule(name).orElse(null);
+        if (module != null) {
+            // module already loaded
+            return module;
+        }
+
+        // resolve the module with the top-most layer as the parent
+        ModuleFinder empty = ModuleFinder.of();
+        ModuleFinder finder = ModuleBootstrap.unlimitedFinder();
+        Set<String> roots = Set.of(name);
+        Configuration cf = top.configuration().resolveAndBind(empty, finder, roots);
+
+        // create the child layer
+        Function<String, ClassLoader> clf = ModuleLoaderMap.mappingFunction(cf);
+        ModuleLayer newLayer = top.defineModules(cf, clf);
+
+        // add qualified exports/opens to give access to modules in child layer
+        Map<String, Module> map = newLayer.modules().stream()
+                                          .collect(Collectors.toMap(Module::getName,
+                                                  Function.identity()));
+        ModuleLayer layer = top;
+        while (layer != null) {
+            for (Module m : layer.modules()) {
+                // qualified exports
+                m.getDescriptor().exports().stream()
+                    .filter(ModuleDescriptor.Exports::isQualified)
+                    .forEach(e -> e.targets().forEach(target -> {
+                        Module other = map.get(target);
+                        if (other != null) {
+                            addExports(m, e.source(), other);
+                        }}));
+
+                // qualified opens
+                m.getDescriptor().opens().stream()
+                    .filter(ModuleDescriptor.Opens::isQualified)
+                    .forEach(o -> o.targets().forEach(target -> {
+                        Module other = map.get(target);
+                        if (other != null) {
+                            addOpens(m, o.source(), other);
+                        }}));
+            }
+
+            List<ModuleLayer> parents = layer.parents();
+            assert parents.size() <= 1;
+            layer = parents.isEmpty() ? null : parents.get(0);
+        }
+
+        // update security manager before making types visible
+        JLA.addNonExportedPackages(newLayer);
+
+        // update the built-in class loaders to make the types visible
+        for (ResolvedModule resolvedModule : cf.modules()) {
+            ModuleReference mref = resolvedModule.reference();
+            String mn = mref.descriptor().name();
+            ClassLoader cl = clf.apply(mn);
+            if (cl == null) {
+                BootLoader.loadModule(mref);
+            } else {
+                ((BuiltinClassLoader) cl).loadModule(mref);
+            }
+        }
+
+        // new top layer
+        topLayer = newLayer;
+
+        // return module
+        return newLayer.findModule(name)
+                       .orElseThrow(() -> new InternalError("module not loaded"));
+
+    }
+
+    /**
+     * Finds the module with the given name in the boot layer or any child
+     * layers created to load the "java.instrument" or "jdk.management.agent"
+     * modules into a running VM.
+     */
+    public static Optional<Module> findLoadedModule(String name) {
+        ModuleLayer top = topLayer;
+        if (top == null)
+            top = ModuleLayer.boot();
+        return top.findModule(name);
+    }
+
+    // the top-most layer
+    private static volatile ModuleLayer topLayer;
+
+}
diff --git a/tests/test_data/std/jdk/internal/module/Resources.class b/tests/test_data/std/jdk/internal/module/Resources.class
new file mode 100644
index 0000000000000000000000000000000000000000..ba0b68e93c4d09e8b1ac39d6c4d51ed41c7baf10
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HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/module/Resources.java b/tests/test_data/std/jdk/internal/module/Resources.java
new file mode 100644
index 00000000..2bd26e47
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/module/Resources.java
@@ -0,0 +1,177 @@
+/*
+ * Copyright (c) 2016, 2023, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package jdk.internal.module;
+
+import java.io.File;
+import java.io.IOException;
+import java.nio.file.FileSystem;
+import java.nio.file.Files;
+import java.nio.file.InvalidPathException;
+import java.nio.file.NoSuchFileException;
+import java.nio.file.Path;
+import java.nio.file.attribute.BasicFileAttributes;
+
+/**
+ * A helper class to support working with resources in modules. Also provides
+ * support for translating resource names to file paths.
+ */
+public final class Resources {
+    private Resources() { }
+
+    /**
+     * Return true if a resource can be encapsulated. Resource with names
+     * ending in ".class" or "/" cannot be encapsulated. Resource names
+     * that map to a legal package name can be encapsulated.
+     */
+    public static boolean canEncapsulate(String name) {
+        int len = name.length();
+        if (len > 6 && name.endsWith(".class")) {
+            return false;
+        } else {
+            return Checks.isPackageName(toPackageName(name));
+        }
+    }
+
+    /**
+     * Derive a <em>package name</em> for a resource. The package name
+     * returned by this method may not be a legal package name. This method
+     * returns null if the resource name ends with a "/" (a directory)
+     * or the resource name does not contain a "/".
+     */
+    public static String toPackageName(String name) {
+        int index = name.lastIndexOf('/');
+        if (index == -1 || index == name.length()-1) {
+            return "";
+        } else {
+            return name.substring(0, index).replace('/', '.');
+        }
+    }
+
+    /**
+     * Returns a resource name corresponding to the relative file path
+     * between {@code dir} and {@code file}. If the file is a directory
+     * then the name will end with a  "/", except the top-level directory
+     * where the empty string is returned.
+     */
+    public static String toResourceName(Path dir, Path file) {
+        String s = dir.relativize(file)
+                      .toString()
+                      .replace(File.separatorChar, '/');
+        if (!s.isEmpty() && Files.isDirectory(file))
+            s += "/";
+        return s;
+    }
+
+    /**
+     * Returns a file path to a resource in a file tree. If the resource
+     * name has a trailing "/" then the file path will locate a directory.
+     * Returns {@code null} if the resource does not map to a file in the
+     * tree file.
+     */
+    public static Path toFilePath(Path dir, String name) throws IOException {
+        boolean expectDirectory = name.endsWith("/");
+        if (expectDirectory) {
+            name = name.substring(0, name.length() - 1);  // drop trailing "/"
+        }
+        Path path = toSafeFilePath(dir.getFileSystem(), name);
+        if (path != null) {
+            Path file = dir.resolve(path);
+            try {
+                BasicFileAttributes attrs;
+                attrs = Files.readAttributes(file, BasicFileAttributes.class);
+                if (attrs.isDirectory()
+                    || (!attrs.isDirectory() && !expectDirectory))
+                    return file;
+            } catch (NoSuchFileException ignore) { }
+        }
+        return null;
+    }
+
+    /**
+     * Map a resource name to a "safe" file path. Returns {@code null} if
+     * the resource name cannot be converted into a "safe" file path.
+     *
+     * Resource names with empty elements, or elements that are "." or ".."
+     * are rejected, as are resource names that translates to a file path
+     * with a root component.
+     */
+    private static Path toSafeFilePath(FileSystem fs, String name) {
+        // scan elements of resource name
+        int next;
+        int off = 0;
+        while ((next = name.indexOf('/', off)) != -1) {
+            int len = next - off;
+            if (!mayTranslate(name, off, len)) {
+                return null;
+            }
+            off = next + 1;
+        }
+        int rem = name.length() - off;
+        if (!mayTranslate(name, off, rem)) {
+            return null;
+        }
+
+        // map resource name to a file path string
+        String pathString;
+        if (File.separatorChar == '/') {
+            pathString = name;
+        } else {
+            // not allowed to embed file separators
+            if (name.contains(File.separator))
+                return null;
+            pathString = name.replace('/', File.separatorChar);
+        }
+
+        // try to convert to a Path
+        Path path;
+        try {
+            path = fs.getPath(pathString);
+        } catch (InvalidPathException e) {
+            // not a valid file path
+            return null;
+        }
+
+        // file path not allowed to have root component
+        return (path.getRoot() == null) ? path : null;
+    }
+
+    /**
+     * Returns {@code true} if the element in a resource name is a candidate
+     * to translate to the element of a file path.
+     */
+    private static boolean mayTranslate(String name, int off, int len) {
+        if (len <= 2) {
+            if (len == 0)
+                return false;
+            boolean starsWithDot = (name.charAt(off) == '.');
+            if (len == 1 && starsWithDot)
+                return false;
+            if (len == 2 && starsWithDot && (name.charAt(off+1) == '.'))
+                return false;
+        }
+        return true;
+    }
+
+}
diff --git a/tests/test_data/std/jdk/internal/module/ServicesCatalog$ServiceProvider.class b/tests/test_data/std/jdk/internal/module/ServicesCatalog$ServiceProvider.class
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diff --git a/tests/test_data/std/jdk/internal/module/ServicesCatalog.class b/tests/test_data/std/jdk/internal/module/ServicesCatalog.class
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/module/ServicesCatalog.java b/tests/test_data/std/jdk/internal/module/ServicesCatalog.java
new file mode 100644
index 00000000..730bbe63
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/module/ServicesCatalog.java
@@ -0,0 +1,186 @@
+/*
+ * Copyright (c) 2014, 2020, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package jdk.internal.module;
+
+import java.lang.module.ModuleDescriptor;
+import java.lang.module.ModuleDescriptor.Provides;
+import java.util.Arrays;
+import java.util.List;
+import java.util.Map;
+import java.util.Objects;
+import java.util.concurrent.ConcurrentHashMap;
+import java.util.concurrent.CopyOnWriteArrayList;
+
+import jdk.internal.loader.ClassLoaderValue;
+
+/**
+ * A <em>services catalog</em>. Each {@code ClassLoader} and {@code Layer} has
+ * an optional {@code ServicesCatalog} for modules that provide services.
+ *
+ * @apiNote This class will be replaced once the ServiceLoader is further
+ *          specified
+ */
+public final class ServicesCatalog {
+
+    /**
+     * Represents a service provider in the services catalog.
+     */
+    public static final class ServiceProvider {
+        private final Module module;
+        private final String providerName;
+
+        public ServiceProvider(Module module, String providerName) {
+            this.module = module;
+            this.providerName = providerName;
+        }
+
+        public Module module() {
+            return module;
+        }
+
+        public String providerName() {
+            return providerName;
+        }
+
+        @Override
+        public int hashCode() {
+            return Objects.hash(module, providerName);
+        }
+
+        @Override
+        public boolean equals(Object ob) {
+            if (!(ob instanceof ServiceProvider))
+                return false;
+            ServiceProvider that = (ServiceProvider)ob;
+            return Objects.equals(this.module, that.module)
+                    && Objects.equals(this.providerName, that.providerName);
+        }
+    }
+
+    // service name -> list of providers
+    private final Map<String, List<ServiceProvider>> map = new ConcurrentHashMap<>(32);
+
+    private ServicesCatalog() { }
+
+    /**
+     * Creates a ServicesCatalog that supports concurrent registration
+     * and lookup
+     */
+    public static ServicesCatalog create() {
+        return new ServicesCatalog();
+    }
+
+    /**
+     * Adds service providers for the given service type.
+     */
+    private void addProviders(String service, ServiceProvider ... providers) {
+        List<ServiceProvider> list = map.get(service);
+        if (list == null) {
+            list = new CopyOnWriteArrayList<>(providers);
+            List<ServiceProvider> prev = map.putIfAbsent(service, list);
+            if (prev != null) {
+                // someone else got there
+                prev.addAll(list);
+            }
+        } else {
+            if (providers.length == 1) {
+                list.add(providers[0]);
+            } else {
+                list.addAll(Arrays.asList(providers));
+            }
+        }
+    }
+
+    /**
+     * Registers the providers in the given module in this services catalog.
+     */
+    public void register(Module module) {
+        ModuleDescriptor descriptor = module.getDescriptor();
+        for (Provides provides : descriptor.provides()) {
+            String service = provides.service();
+            List<String> providerNames = provides.providers();
+            int count = providerNames.size();
+            ServiceProvider[] providers = new ServiceProvider[count];
+            for (int i = 0; i < count; i++) {
+                providers[i] = new ServiceProvider(module, providerNames.get(i));
+            }
+            addProviders(service, providers);
+        }
+    }
+
+    /**
+     * Adds a provider in the given module to this services catalog.
+     *
+     * @apiNote This method is for use by java.lang.instrument
+     */
+    public void addProvider(Module module, Class<?> service, Class<?> impl) {
+        addProviders(service.getName(), new ServiceProvider(module, impl.getName()));
+    }
+
+    /**
+     * Returns the (possibly empty) list of service providers that implement
+     * the given service type.
+     */
+    public List<ServiceProvider> findServices(String service) {
+        return map.getOrDefault(service, List.of());
+    }
+
+    /**
+     * Returns the ServicesCatalog for the given class loader or {@code null}
+     * if there is none.
+     */
+    public static ServicesCatalog getServicesCatalogOrNull(ClassLoader loader) {
+        return CLV.get(loader);
+    }
+
+    /**
+     * Returns the ServicesCatalog for the given class loader, creating it if
+     * needed.
+     */
+    public static ServicesCatalog getServicesCatalog(ClassLoader loader) {
+        // CLV.computeIfAbsent(loader, (cl, clv) -> create());
+        ServicesCatalog catalog = CLV.get(loader);
+        if (catalog == null) {
+            catalog = create();
+            ServicesCatalog previous = CLV.putIfAbsent(loader, catalog);
+            if (previous != null) catalog = previous;
+        }
+        return catalog;
+    }
+
+    /**
+     * Associates the given ServicesCatalog with the given class loader.
+     */
+    public static void putServicesCatalog(ClassLoader loader, ServicesCatalog catalog) {
+        ServicesCatalog previous = CLV.putIfAbsent(loader, catalog);
+        if (previous != null) {
+            throw new InternalError();
+        }
+    }
+
+    // the ServicesCatalog registered to a class loader
+    private static final ClassLoaderValue<ServicesCatalog> CLV = new ClassLoaderValue<>();
+}
diff --git a/tests/test_data/std/jdk/internal/module/SystemModuleFinders$1.class b/tests/test_data/std/jdk/internal/module/SystemModuleFinders$1.class
new file mode 100644
index 0000000000000000000000000000000000000000..25d944f6b65aba7ecaaa2d22538739a373977b61
GIT binary patch
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literal 0
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diff --git a/tests/test_data/std/jdk/internal/module/SystemModuleFinders$2.class b/tests/test_data/std/jdk/internal/module/SystemModuleFinders$2.class
new file mode 100644
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GIT binary patch
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diff --git a/tests/test_data/std/jdk/internal/module/SystemModuleFinders$3.class b/tests/test_data/std/jdk/internal/module/SystemModuleFinders$3.class
new file mode 100644
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GIT binary patch
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literal 0
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diff --git a/tests/test_data/std/jdk/internal/module/SystemModuleFinders$SystemImage.class b/tests/test_data/std/jdk/internal/module/SystemModuleFinders$SystemImage.class
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GIT binary patch
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/module/SystemModuleFinders$SystemModuleFinder.class b/tests/test_data/std/jdk/internal/module/SystemModuleFinders$SystemModuleFinder.class
new file mode 100644
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GIT binary patch
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new file mode 100644
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diff --git a/tests/test_data/std/jdk/internal/module/SystemModuleFinders.java b/tests/test_data/std/jdk/internal/module/SystemModuleFinders.java
new file mode 100644
index 00000000..74af7570
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/module/SystemModuleFinders.java
@@ -0,0 +1,595 @@
+/*
+ * Copyright (c) 2015, 2021, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package jdk.internal.module;
+
+import java.io.ByteArrayInputStream;
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.UncheckedIOException;
+import java.lang.module.ModuleDescriptor;
+import java.lang.module.ModuleFinder;
+import java.lang.module.ModuleReader;
+import java.lang.module.ModuleReference;
+import java.lang.reflect.Constructor;
+import java.net.URI;
+import java.net.URLConnection;
+import java.nio.ByteBuffer;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.security.AccessController;
+import java.security.PrivilegedAction;
+import java.util.ArrayDeque;
+import java.util.Collections;
+import java.util.Deque;
+import java.util.HashMap;
+import java.util.HashSet;
+import java.util.Iterator;
+import java.util.Map;
+import java.util.Objects;
+import java.util.Optional;
+import java.util.Set;
+import java.util.Spliterator;
+import java.util.function.Consumer;
+import java.util.function.Supplier;
+import java.util.stream.Stream;
+import java.util.stream.StreamSupport;
+
+import jdk.internal.jimage.ImageLocation;
+import jdk.internal.jimage.ImageReader;
+import jdk.internal.jimage.ImageReaderFactory;
+import jdk.internal.access.JavaNetUriAccess;
+import jdk.internal.access.SharedSecrets;
+import jdk.internal.util.StaticProperty;
+import jdk.internal.module.ModuleHashes.HashSupplier;
+
+/**
+ * The factory for SystemModules objects and for creating ModuleFinder objects
+ * that find modules in the runtime image.
+ *
+ * This class supports initializing the module system when the runtime is an
+ * images build, an exploded build, or an images build with java.base patched
+ * by an exploded java.base. It also supports a testing mode that re-parses
+ * the module-info.class resources in the run-time image.
+ */
+
+public final class SystemModuleFinders {
+    private static final JavaNetUriAccess JNUA = SharedSecrets.getJavaNetUriAccess();
+
+    private static final boolean USE_FAST_PATH;
+    static {
+        String value = System.getProperty("jdk.system.module.finder.disableFastPath");
+        if (value == null) {
+            USE_FAST_PATH = true;
+        } else {
+            USE_FAST_PATH = !value.isEmpty() && !Boolean.parseBoolean(value);
+        }
+    }
+
+    // cached ModuleFinder returned from ofSystem
+    private static volatile ModuleFinder cachedSystemModuleFinder;
+
+    private SystemModuleFinders() { }
+
+    /**
+     * Returns the SystemModules object to reconstitute all modules. Returns
+     * null if this is an exploded build or java.base is patched by an exploded
+     * build.
+     */
+    static SystemModules allSystemModules() {
+        if (USE_FAST_PATH) {
+            return SystemModulesMap.allSystemModules();
+        } else {
+            return null;
+        }
+    }
+
+    /**
+     * Returns a SystemModules object to reconstitute the modules for the
+     * given initial module. If the initial module is null then return the
+     * SystemModules object to reconstitute the default modules.
+     *
+     * Return null if there is no SystemModules class for the initial module,
+     * this is an exploded build, or java.base is patched by an exploded build.
+     */
+    static SystemModules systemModules(String initialModule) {
+        if (USE_FAST_PATH) {
+            if (initialModule == null) {
+                return SystemModulesMap.defaultSystemModules();
+            }
+
+            String[] initialModules = SystemModulesMap.moduleNames();
+            for (int i = 0; i < initialModules.length; i++) {
+                String moduleName = initialModules[i];
+                if (initialModule.equals(moduleName)) {
+                    String cn = SystemModulesMap.classNames()[i];
+                    try {
+                        // one-arg Class.forName as java.base may not be defined
+                        Constructor<?> ctor = Class.forName(cn).getConstructor();
+                        return (SystemModules) ctor.newInstance();
+                    } catch (Exception e) {
+                        throw new InternalError(e);
+                    }
+                }
+            }
+        }
+        return null;
+    }
+
+    /**
+     * Returns a ModuleFinder that is backed by the given SystemModules object.
+     *
+     * @apiNote The returned ModuleFinder is thread safe.
+     */
+    static ModuleFinder of(SystemModules systemModules) {
+        ModuleDescriptor[] descriptors = systemModules.moduleDescriptors();
+        ModuleTarget[] targets = systemModules.moduleTargets();
+        ModuleHashes[] recordedHashes = systemModules.moduleHashes();
+        ModuleResolution[] moduleResolutions = systemModules.moduleResolutions();
+
+        int moduleCount = descriptors.length;
+        ModuleReference[] mrefs = new ModuleReference[moduleCount];
+        @SuppressWarnings(value = {"rawtypes", "unchecked"})
+        Map.Entry<String, ModuleReference>[] map
+            = (Map.Entry<String, ModuleReference>[])new Map.Entry[moduleCount];
+
+        Map<String, byte[]> nameToHash = generateNameToHash(recordedHashes);
+
+        for (int i = 0; i < moduleCount; i++) {
+            String name = descriptors[i].name();
+            HashSupplier hashSupplier = hashSupplier(nameToHash, name);
+            ModuleReference mref = toModuleReference(descriptors[i],
+                                                     targets[i],
+                                                     recordedHashes[i],
+                                                     hashSupplier,
+                                                     moduleResolutions[i]);
+            mrefs[i] = mref;
+            map[i] = Map.entry(name, mref);
+        }
+
+        return new SystemModuleFinder(mrefs, map);
+    }
+
+    /**
+     * Returns the ModuleFinder to find all system modules. Supports both
+     * images and exploded builds.
+     *
+     * @apiNote Used by ModuleFinder.ofSystem()
+     */
+    public static ModuleFinder ofSystem() {
+        ModuleFinder finder = cachedSystemModuleFinder;
+        if (finder != null) {
+            return finder;
+        }
+
+        // probe to see if this is an images build
+        String home = StaticProperty.javaHome();
+        Path modules = Path.of(home, "lib", "modules");
+        if (Files.isRegularFile(modules)) {
+            if (USE_FAST_PATH) {
+                SystemModules systemModules = allSystemModules();
+                if (systemModules != null) {
+                    finder = of(systemModules);
+                }
+            }
+
+            // fall back to parsing the module-info.class files in image
+            if (finder == null) {
+                finder = ofModuleInfos();
+            }
+
+            cachedSystemModuleFinder = finder;
+            return finder;
+
+        }
+
+        // exploded build (do not cache module finder)
+        Path dir = Path.of(home, "modules");
+        if (!Files.isDirectory(dir))
+            throw new InternalError("Unable to detect the run-time image");
+        ModuleFinder f = ModulePath.of(ModuleBootstrap.patcher(), dir);
+        return new ModuleFinder() {
+            @SuppressWarnings("removal")
+            @Override
+            public Optional<ModuleReference> find(String name) {
+                PrivilegedAction<Optional<ModuleReference>> pa = () -> f.find(name);
+                return AccessController.doPrivileged(pa);
+            }
+            @SuppressWarnings("removal")
+            @Override
+            public Set<ModuleReference> findAll() {
+                PrivilegedAction<Set<ModuleReference>> pa = f::findAll;
+                return AccessController.doPrivileged(pa);
+            }
+        };
+    }
+
+    /**
+     * Parses the module-info.class of all module in the runtime image and
+     * returns a ModuleFinder to find the modules.
+     *
+     * @apiNote The returned ModuleFinder is thread safe.
+     */
+    private static ModuleFinder ofModuleInfos() {
+        // parse the module-info.class in every module
+        Map<String, ModuleInfo.Attributes> nameToAttributes = new HashMap<>();
+        Map<String, byte[]> nameToHash = new HashMap<>();
+        ImageReader reader = SystemImage.reader();
+        for (String mn : reader.getModuleNames()) {
+            ImageLocation loc = reader.findLocation(mn, "module-info.class");
+            ModuleInfo.Attributes attrs
+                = ModuleInfo.read(reader.getResourceBuffer(loc), null);
+
+            nameToAttributes.put(mn, attrs);
+            ModuleHashes hashes = attrs.recordedHashes();
+            if (hashes != null) {
+                for (String name : hashes.names()) {
+                    nameToHash.computeIfAbsent(name, k -> hashes.hashFor(name));
+                }
+            }
+        }
+
+        // create a ModuleReference for each module
+        Set<ModuleReference> mrefs = new HashSet<>();
+        Map<String, ModuleReference> nameToModule = new HashMap<>();
+        for (Map.Entry<String, ModuleInfo.Attributes> e : nameToAttributes.entrySet()) {
+            String mn = e.getKey();
+            ModuleInfo.Attributes attrs = e.getValue();
+            HashSupplier hashSupplier = hashSupplier(nameToHash, mn);
+            ModuleReference mref = toModuleReference(attrs.descriptor(),
+                                                     attrs.target(),
+                                                     attrs.recordedHashes(),
+                                                     hashSupplier,
+                                                     attrs.moduleResolution());
+            mrefs.add(mref);
+            nameToModule.put(mn, mref);
+        }
+
+        return new SystemModuleFinder(mrefs, nameToModule);
+    }
+
+    /**
+     * A ModuleFinder that finds module in an array or set of modules.
+     */
+    private static class SystemModuleFinder implements ModuleFinder {
+        final Set<ModuleReference> mrefs;
+        final Map<String, ModuleReference> nameToModule;
+
+        SystemModuleFinder(ModuleReference[] array,
+                           Map.Entry<String, ModuleReference>[] map) {
+            this.mrefs = Set.of(array);
+            this.nameToModule = Map.ofEntries(map);
+        }
+
+        SystemModuleFinder(Set<ModuleReference> mrefs,
+                           Map<String, ModuleReference> nameToModule) {
+            this.mrefs = Set.copyOf(mrefs);
+            this.nameToModule = Map.copyOf(nameToModule);
+        }
+
+        @Override
+        public Optional<ModuleReference> find(String name) {
+            Objects.requireNonNull(name);
+            return Optional.ofNullable(nameToModule.get(name));
+        }
+
+        @Override
+        public Set<ModuleReference> findAll() {
+            return mrefs;
+        }
+    }
+
+    /**
+     * Creates a ModuleReference to the system module.
+     */
+    static ModuleReference toModuleReference(ModuleDescriptor descriptor,
+                                             ModuleTarget target,
+                                             ModuleHashes recordedHashes,
+                                             HashSupplier hasher,
+                                             ModuleResolution mres) {
+        String mn = descriptor.name();
+        URI uri = JNUA.create("jrt", "/".concat(mn));
+
+        Supplier<ModuleReader> readerSupplier = new Supplier<>() {
+            @Override
+            public ModuleReader get() {
+                return new SystemModuleReader(mn, uri);
+            }
+        };
+
+        ModuleReference mref = new ModuleReferenceImpl(descriptor,
+                                                       uri,
+                                                       readerSupplier,
+                                                       null,
+                                                       target,
+                                                       recordedHashes,
+                                                       hasher,
+                                                       mres);
+
+        // may need a reference to a patched module if --patch-module specified
+        mref = ModuleBootstrap.patcher().patchIfNeeded(mref);
+
+        return mref;
+    }
+
+    /**
+     * Generates a map of module name to hash value.
+     */
+    static Map<String, byte[]> generateNameToHash(ModuleHashes[] recordedHashes) {
+        Map<String, byte[]> nameToHash = null;
+
+        boolean secondSeen = false;
+        // record the hashes to build HashSupplier
+        for (ModuleHashes mh : recordedHashes) {
+            if (mh != null) {
+                // if only one module contain ModuleHashes, use it
+                if (nameToHash == null) {
+                    nameToHash = mh.hashes();
+                } else {
+                    if (!secondSeen) {
+                        nameToHash = new HashMap<>(nameToHash);
+                        secondSeen = true;
+                    }
+                    nameToHash.putAll(mh.hashes());
+                }
+            }
+        }
+        return (nameToHash != null) ? nameToHash : Map.of();
+    }
+
+    /**
+     * Returns a HashSupplier that returns the hash of the given module.
+     */
+    static HashSupplier hashSupplier(Map<String, byte[]> nameToHash, String name) {
+        byte[] hash = nameToHash.get(name);
+        if (hash != null) {
+            // avoid lambda here
+            return new HashSupplier() {
+                @Override
+                public byte[] generate(String algorithm) {
+                    return hash;
+                }
+            };
+        } else {
+            return null;
+        }
+    }
+
+    /**
+     * Holder class for the ImageReader
+     *
+     * @apiNote This class must be loaded before a security manager is set.
+     */
+    private static class SystemImage {
+        static final ImageReader READER = ImageReaderFactory.getImageReader();
+        static ImageReader reader() {
+            return READER;
+        }
+    }
+
+    /**
+     * A ModuleReader for reading resources from a module linked into the
+     * run-time image.
+     */
+    private static class SystemModuleReader implements ModuleReader {
+        private final String module;
+        private volatile boolean closed;
+
+        /**
+         * If there is a security manager set then check permission to
+         * connect to the run-time image.
+         */
+        private static void checkPermissionToConnect(URI uri) {
+            @SuppressWarnings("removal")
+            SecurityManager sm = System.getSecurityManager();
+            if (sm != null) {
+                try {
+                    URLConnection uc = uri.toURL().openConnection();
+                    sm.checkPermission(uc.getPermission());
+                } catch (IOException ioe) {
+                    throw new UncheckedIOException(ioe);
+                }
+            }
+        }
+
+        SystemModuleReader(String module, URI uri) {
+            checkPermissionToConnect(uri);
+            this.module = module;
+        }
+
+        /**
+         * Returns the ImageLocation for the given resource, {@code null}
+         * if not found.
+         */
+        private ImageLocation findImageLocation(String name) throws IOException {
+            Objects.requireNonNull(name);
+            if (closed)
+                throw new IOException("ModuleReader is closed");
+            ImageReader imageReader = SystemImage.reader();
+            if (imageReader != null) {
+                return imageReader.findLocation(module, name);
+            } else {
+                // not an images build
+                return null;
+            }
+        }
+
+        /**
+         * Returns {@code true} if the given resource exists, {@code false}
+         * if not found.
+         */
+        private boolean containsImageLocation(String name) throws IOException {
+            Objects.requireNonNull(name);
+            if (closed)
+                throw new IOException("ModuleReader is closed");
+            ImageReader imageReader = SystemImage.reader();
+            if (imageReader != null) {
+                return imageReader.verifyLocation(module, name);
+            } else {
+                // not an images build
+                return false;
+            }
+        }
+
+        @Override
+        public Optional<URI> find(String name) throws IOException {
+            if (containsImageLocation(name)) {
+                URI u = JNUA.create("jrt", "/" + module + "/" + name);
+                return Optional.of(u);
+            } else {
+                return Optional.empty();
+            }
+        }
+
+        @Override
+        public Optional<InputStream> open(String name) throws IOException {
+            return read(name).map(this::toInputStream);
+        }
+
+        private InputStream toInputStream(ByteBuffer bb) { // ## -> ByteBuffer?
+            try {
+                int rem = bb.remaining();
+                byte[] bytes = new byte[rem];
+                bb.get(bytes);
+                return new ByteArrayInputStream(bytes);
+            } finally {
+                release(bb);
+            }
+        }
+
+        @Override
+        public Optional<ByteBuffer> read(String name) throws IOException {
+            ImageLocation location = findImageLocation(name);
+            if (location != null) {
+                return Optional.of(SystemImage.reader().getResourceBuffer(location));
+            } else {
+                return Optional.empty();
+            }
+        }
+
+        @Override
+        public void release(ByteBuffer bb) {
+            Objects.requireNonNull(bb);
+            ImageReader.releaseByteBuffer(bb);
+        }
+
+        @Override
+        public Stream<String> list() throws IOException {
+            if (closed)
+                throw new IOException("ModuleReader is closed");
+
+            Spliterator<String> s = new ModuleContentSpliterator(module);
+            return StreamSupport.stream(s, false);
+        }
+
+        @Override
+        public void close() {
+            // nothing else to do
+            closed = true;
+        }
+    }
+
+    /**
+     * A Spliterator for traversing the resources of a module linked into the
+     * run-time image.
+     */
+    private static class ModuleContentSpliterator implements Spliterator<String> {
+        final String moduleRoot;
+        final Deque<ImageReader.Node> stack;
+        Iterator<ImageReader.Node> iterator;
+
+        ModuleContentSpliterator(String module) throws IOException {
+            moduleRoot = "/modules/" + module;
+            stack = new ArrayDeque<>();
+
+            // push the root node to the stack to get started
+            ImageReader.Node dir = SystemImage.reader().findNode(moduleRoot);
+            if (dir == null || !dir.isDirectory())
+                throw new IOException(moduleRoot + " not a directory");
+            stack.push(dir);
+            iterator = Collections.emptyIterator();
+        }
+
+        /**
+         * Returns the name of the next non-directory node or {@code null} if
+         * there are no remaining nodes to visit.
+         */
+        private String next() throws IOException {
+            for (;;) {
+                while (iterator.hasNext()) {
+                    ImageReader.Node node = iterator.next();
+                    String name = node.getName();
+                    if (node.isDirectory()) {
+                        // build node
+                        ImageReader.Node dir = SystemImage.reader().findNode(name);
+                        assert dir.isDirectory();
+                        stack.push(dir);
+                    } else {
+                        // strip /modules/$MODULE/ prefix
+                        return name.substring(moduleRoot.length() + 1);
+                    }
+                }
+
+                if (stack.isEmpty()) {
+                    return null;
+                } else {
+                    ImageReader.Node dir = stack.poll();
+                    assert dir.isDirectory();
+                    iterator = dir.getChildren().iterator();
+                }
+            }
+        }
+
+        @Override
+        public boolean tryAdvance(Consumer<? super String> action) {
+            String next;
+            try {
+                next = next();
+            } catch (IOException ioe) {
+                throw new UncheckedIOException(ioe);
+            }
+            if (next != null) {
+                action.accept(next);
+                return true;
+            } else {
+                return false;
+            }
+        }
+
+        @Override
+        public Spliterator<String> trySplit() {
+            return null;
+        }
+
+        @Override
+        public int characteristics() {
+            return Spliterator.DISTINCT + Spliterator.NONNULL + Spliterator.IMMUTABLE;
+        }
+
+        @Override
+        public long estimateSize() {
+            return Long.MAX_VALUE;
+        }
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/module/SystemModules$0.class b/tests/test_data/std/jdk/internal/module/SystemModules$0.class
new file mode 100644
index 0000000000000000000000000000000000000000..fa550fd65e8c169e0a6baaec92b5935d60d94c30
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diff --git a/tests/test_data/std/jdk/internal/module/SystemModules$1.class b/tests/test_data/std/jdk/internal/module/SystemModules$1.class
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diff --git a/tests/test_data/std/jdk/internal/module/SystemModules$2.class b/tests/test_data/std/jdk/internal/module/SystemModules$2.class
new file mode 100644
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diff --git a/tests/test_data/std/jdk/internal/module/SystemModules$3.class b/tests/test_data/std/jdk/internal/module/SystemModules$3.class
new file mode 100644
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diff --git a/tests/test_data/std/jdk/internal/module/SystemModules$4.class b/tests/test_data/std/jdk/internal/module/SystemModules$4.class
new file mode 100644
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diff --git a/tests/test_data/std/jdk/internal/module/SystemModules$5.class b/tests/test_data/std/jdk/internal/module/SystemModules$5.class
new file mode 100644
index 0000000000000000000000000000000000000000..6f75408db0a853f096ba8db2f82e8967c9c3add5
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diff --git a/tests/test_data/std/jdk/internal/module/SystemModules$all.class b/tests/test_data/std/jdk/internal/module/SystemModules$all.class
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diff --git a/tests/test_data/std/jdk/internal/module/SystemModules$default.class b/tests/test_data/std/jdk/internal/module/SystemModules$default.class
new file mode 100644
index 0000000000000000000000000000000000000000..d8eefb91f9731b7703b402fc3706390b79a3c5f9
GIT binary patch
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diff --git a/tests/test_data/std/jdk/internal/module/SystemModules.class b/tests/test_data/std/jdk/internal/module/SystemModules.class
new file mode 100644
index 0000000000000000000000000000000000000000..921b3b576d159242098014c5a60db1b4d682dcb2
GIT binary patch
literal 595
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zKtuF2?acr8pK0gw>-_@&uHiI*3WKxRWF8A;xmGCSMLsDckCQiJ`C{lUCV*WAtr@;z
zEKz0g!+6G1OQ|WEWGRJx#B`1sHw<>V(KCY%74B48jM3)0G+_{W?;CDXEtXUv{Y5u=
zxnDb%-954v_82sM=?QhlErI6_+%mamy^gqs=LTq|tNH%Hyo|7N))6<kEUd^CvC-cx
z*IMH1zU_$PgvhWP`A3qKjEA@+MKuwbLR)CgVDP(swecs3)k0;x4TFT+ErNcpPqwur
zFLcUpg(Tnhk2PMd{&^pOwnXa(2xzN&KnaRL84sZ9?lq{p*np;shj8R#3qs=CL|33g
Jr(<_I`359gtOfu8

literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/module/SystemModules.java b/tests/test_data/std/jdk/internal/module/SystemModules.java
new file mode 100644
index 00000000..4c74068a
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/module/SystemModules.java
@@ -0,0 +1,86 @@
+/*
+ * Copyright (c) 2015, 2021, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package jdk.internal.module;
+
+import java.lang.module.ModuleDescriptor;
+import java.util.Map;
+import java.util.Set;
+
+/**
+ * A SystemModules object reconstitutes module descriptors and other modules
+ * attributes in an efficient way to avoid parsing module-info.class files at
+ * startup. Implementations of this class are generated by the "system modules"
+ * jlink plugin.
+ *
+ * @see SystemModuleFinders
+ * @see jdk.tools.jlink.internal.plugins.SystemModulesPlugin
+ */
+
+interface SystemModules {
+
+    /**
+     * Returns false if the module reconstituted by this SystemModules object
+     * have no overlapping packages. Returns true if there are overlapping
+     * packages or unknown.
+     */
+    boolean hasSplitPackages();
+
+    /**
+     * Return false if the modules reconstituted by this SystemModules object
+     * do not include any incubator modules. Returns true if there are
+     * incubating modules or unknown.
+     */
+    boolean hasIncubatorModules();
+
+    /**
+     * Returns the non-empty array of ModuleDescriptor objects.
+     */
+    ModuleDescriptor[] moduleDescriptors();
+
+    /**
+     * Returns the array of ModuleTarget objects. The array elements correspond
+     * to the array of ModuleDescriptor objects.
+     */
+    ModuleTarget[] moduleTargets();
+
+    /**
+     * Returns the array of ModuleHashes objects. The array elements correspond
+     * to the array of ModuleDescriptor objects.
+     */
+    ModuleHashes[] moduleHashes();
+
+    /**
+     * Returns the array of ModuleResolution objects. The array elements correspond
+     * to the array of ModuleDescriptor objects.
+     */
+    ModuleResolution[] moduleResolutions();
+
+    /**
+     * Returns the map representing readability graph for the modules reconstituted
+     * by this SystemModules object.
+     */
+    Map<String, Set<String>> moduleReads();
+}
diff --git a/tests/test_data/std/jdk/internal/module/SystemModulesMap.class b/tests/test_data/std/jdk/internal/module/SystemModulesMap.class
new file mode 100644
index 0000000000000000000000000000000000000000..0a528fd13e176e1c6ec439ec994c2df8d92c48db
GIT binary patch
literal 944
zcma))U2oGc6oy~ZkC?2CE_7pz&utkr1Ddjpt08W<-QXe;QpA;M+^(IQR*5%>e+5^Q
zK=1?hqoy6F=|0e=#*!7E*Ux*-vE$RT-~RyYpv~Y8qC>wQYnjAC`NL6kq@*AGNVOd9
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z;~q75<?Iv9LW5zR>a`BE9;Y%nmI=oa<ulqqBziPb9Lo$=CUj|cg`t)OW6?PjJ<0Ke
z!OoQQKq|tYUBp`Gh~ovt9VOB<Z*See(|^~Rbl$pl32vKXouL5uj$@+`xW)0R5V+0Z
z6#{oSUKax2bG&6Je;P#+ZQP-EW=4f3Jv%V?v|6AqGwS9E_%B)j9Cu;o+YPd1+8@-y
z6Wsebi7<Z?Q72+yN;r6s=V((gGu(RhFBZd+^Dqd@&Z8i#IFEy{>O2iX%XuDz+*u8#
Y?zP+9u5rIK?xt~X8uuIHZsl&A19GeL761SM

literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/module/SystemModulesMap.java b/tests/test_data/std/jdk/internal/module/SystemModulesMap.java
new file mode 100644
index 00000000..3753737c
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/module/SystemModulesMap.java
@@ -0,0 +1,68 @@
+/*
+ * Copyright (c) 2017, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package jdk.internal.module;
+
+/**
+ * This class is generated/overridden at link time to return the names of the
+ * SystemModules classes generated at link time.
+ *
+ * @see SystemModuleFinders
+ * @see jdk.tools.jlink.internal.plugins.SystemModulesPlugin
+ */
+
+class SystemModulesMap {
+
+    /**
+     * Returns the SystemModules object to reconstitute all modules or null
+     * if this is an exploded build.
+     */
+    static SystemModules allSystemModules() {
+        return null;
+    }
+
+    /**
+     * Returns the SystemModules object to reconstitute default modules or null
+     * if this is an exploded build.
+     */
+    static SystemModules defaultSystemModules() {
+        return null;
+    }
+
+    /**
+     * Returns the array of initial module names identified at link time.
+     */
+    static String[] moduleNames() {
+        return new String[0];
+    }
+
+    /**
+     * Returns the array of SystemModules class names. The elements
+     * correspond to the elements in the array returned by moduleNames().
+     */
+    static String[] classNames() {
+        return new String[0];
+    }
+}
\ No newline at end of file
diff --git a/tests/test_data/std/jdk/internal/org/objectweb/asm/AnnotationVisitor.class b/tests/test_data/std/jdk/internal/org/objectweb/asm/AnnotationVisitor.class
new file mode 100644
index 0000000000000000000000000000000000000000..63496d452436872169c12c1dfd227c64787d1c7a
GIT binary patch
literal 2177
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uy2(BglHBAh?|3pGNy({)mHk%!Oom@DfnR-wpcE!Uh7fmxIIj~)!RB8ZnAC&-

literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/org/objectweb/asm/AnnotationVisitor.java b/tests/test_data/std/jdk/internal/org/objectweb/asm/AnnotationVisitor.java
new file mode 100644
index 00000000..f62f7246
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/org/objectweb/asm/AnnotationVisitor.java
@@ -0,0 +1,196 @@
+/*
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/*
+ * This file is available under and governed by the GNU General Public
+ * License version 2 only, as published by the Free Software Foundation.
+ * However, the following notice accompanied the original version of this
+ * file:
+ *
+ * ASM: a very small and fast Java bytecode manipulation framework
+ * Copyright (c) 2000-2011 INRIA, France Telecom
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the copyright holders nor the names of its
+ *    contributors may be used to endorse or promote products derived from
+ *    this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+package jdk.internal.org.objectweb.asm;
+
+/**
+ * A visitor to visit a Java annotation. The methods of this class must be called in the following
+ * order: ( {@code visit} | {@code visitEnum} | {@code visitAnnotation} | {@code visitArray} )*
+ * {@code visitEnd}.
+ *
+ * @author Eric Bruneton
+ * @author Eugene Kuleshov
+ */
+public abstract class AnnotationVisitor {
+
+    /**
+      * The ASM API version implemented by this visitor. The value of this field must be one of the
+      * {@code ASM}<i>x</i> values in {@link Opcodes}.
+      */
+    protected final int api;
+
+    /**
+      * The annotation visitor to which this visitor must delegate method calls. May be {@literal
+      * null}.
+      */
+    protected AnnotationVisitor av;
+
+    /**
+      * Constructs a new {@link AnnotationVisitor}.
+      *
+      * @param api the ASM API version implemented by this visitor. Must be one of the {@code
+      *     ASM}<i>x</i> values in {@link Opcodes}.
+      */
+    protected AnnotationVisitor(final int api) {
+        this(api, null);
+    }
+
+    /**
+      * Constructs a new {@link AnnotationVisitor}.
+      *
+      * @param api the ASM API version implemented by this visitor. Must be one of the {@code
+      *     ASM}<i>x</i> values in {@link Opcodes}.
+      * @param annotationVisitor the annotation visitor to which this visitor must delegate method
+      *     calls. May be {@literal null}.
+      */
+    protected AnnotationVisitor(final int api, final AnnotationVisitor annotationVisitor) {
+        if (api != Opcodes.ASM9
+                && api != Opcodes.ASM8
+                && api != Opcodes.ASM7
+                && api != Opcodes.ASM6
+                && api != Opcodes.ASM5
+                && api != Opcodes.ASM4) {
+            throw new IllegalArgumentException("Unsupported api " + api);
+        }
+        this.api = api;
+        this.av = annotationVisitor;
+    }
+
+    /**
+      * The annotation visitor to which this visitor must delegate method calls. May be {@literal
+      * null}.
+      *
+      * @return the annotation visitor to which this visitor must delegate method calls, or {@literal
+      *     null}.
+      */
+    public AnnotationVisitor getDelegate() {
+        return av;
+    }
+
+    /**
+      * Visits a primitive value of the annotation.
+      *
+      * @param name the value name.
+      * @param value the actual value, whose type must be {@link Byte}, {@link Boolean}, {@link
+      *     Character}, {@link Short}, {@link Integer} , {@link Long}, {@link Float}, {@link Double},
+      *     {@link String} or {@link Type} of {@link Type#OBJECT} or {@link Type#ARRAY} sort. This
+      *     value can also be an array of byte, boolean, short, char, int, long, float or double values
+      *     (this is equivalent to using {@link #visitArray} and visiting each array element in turn,
+      *     but is more convenient).
+      */
+    public void visit(final String name, final Object value) {
+        if (av != null) {
+            av.visit(name, value);
+        }
+    }
+
+    /**
+      * Visits an enumeration value of the annotation.
+      *
+      * @param name the value name.
+      * @param descriptor the class descriptor of the enumeration class.
+      * @param value the actual enumeration value.
+      */
+    public void visitEnum(final String name, final String descriptor, final String value) {
+        if (av != null) {
+            av.visitEnum(name, descriptor, value);
+        }
+    }
+
+    /**
+      * Visits a nested annotation value of the annotation.
+      *
+      * @param name the value name.
+      * @param descriptor the class descriptor of the nested annotation class.
+      * @return a visitor to visit the actual nested annotation value, or {@literal null} if this
+      *     visitor is not interested in visiting this nested annotation. <i>The nested annotation
+      *     value must be fully visited before calling other methods on this annotation visitor</i>.
+      */
+    public AnnotationVisitor visitAnnotation(final String name, final String descriptor) {
+        if (av != null) {
+            return av.visitAnnotation(name, descriptor);
+        }
+        return null;
+    }
+
+    /**
+      * Visits an array value of the annotation. Note that arrays of primitive values (such as byte,
+      * boolean, short, char, int, long, float or double) can be passed as value to {@link #visit
+      * visit}. This is what {@link ClassReader} does for non empty arrays of primitive values.
+      *
+      * @param name the value name.
+      * @return a visitor to visit the actual array value elements, or {@literal null} if this visitor
+      *     is not interested in visiting these values. The 'name' parameters passed to the methods of
+      *     this visitor are ignored. <i>All the array values must be visited before calling other
+      *     methods on this annotation visitor</i>.
+      */
+    public AnnotationVisitor visitArray(final String name) {
+        if (av != null) {
+            return av.visitArray(name);
+        }
+        return null;
+    }
+
+    /** Visits the end of the annotation. */
+    public void visitEnd() {
+        if (av != null) {
+            av.visitEnd();
+        }
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/org/objectweb/asm/AnnotationWriter.class b/tests/test_data/std/jdk/internal/org/objectweb/asm/AnnotationWriter.class
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HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/org/objectweb/asm/AnnotationWriter.java b/tests/test_data/std/jdk/internal/org/objectweb/asm/AnnotationWriter.java
new file mode 100644
index 00000000..fb4ae268
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/org/objectweb/asm/AnnotationWriter.java
@@ -0,0 +1,585 @@
+/*
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/*
+ * This file is available under and governed by the GNU General Public
+ * License version 2 only, as published by the Free Software Foundation.
+ * However, the following notice accompanied the original version of this
+ * file:
+ *
+ * ASM: a very small and fast Java bytecode manipulation framework
+ * Copyright (c) 2000-2011 INRIA, France Telecom
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the copyright holders nor the names of its
+ *    contributors may be used to endorse or promote products derived from
+ *    this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+package jdk.internal.org.objectweb.asm;
+
+/**
+ * An {@link AnnotationVisitor} that generates a corresponding 'annotation' or 'type_annotation'
+ * structure, as defined in the Java Virtual Machine Specification (JVMS). AnnotationWriter
+ * instances can be chained in a doubly linked list, from which Runtime[In]Visible[Type]Annotations
+ * attributes can be generated with the {@link #putAnnotations} method. Similarly, arrays of such
+ * lists can be used to generate Runtime[In]VisibleParameterAnnotations attributes.
+ *
+ * @see <a href="https://docs.oracle.com/javase/specs/jvms/se9/html/jvms-4.html#jvms-4.7.16">JVMS
+ *     4.7.16</a>
+ * @see <a href="https://docs.oracle.com/javase/specs/jvms/se9/html/jvms-4.html#jvms-4.7.20">JVMS
+ *     4.7.20</a>
+ * @author Eric Bruneton
+ * @author Eugene Kuleshov
+ */
+final class AnnotationWriter extends AnnotationVisitor {
+
+    /** Where the constants used in this AnnotationWriter must be stored. */
+    private final SymbolTable symbolTable;
+
+    /**
+      * Whether values are named or not. AnnotationWriter instances used for annotation default and
+      * annotation arrays use unnamed values (i.e. they generate an 'element_value' structure for each
+      * value, instead of an element_name_index followed by an element_value).
+      */
+    private final boolean useNamedValues;
+
+    /**
+      * The 'annotation' or 'type_annotation' JVMS structure corresponding to the annotation values
+      * visited so far. All the fields of these structures, except the last one - the
+      * element_value_pairs array, must be set before this ByteVector is passed to the constructor
+      * (num_element_value_pairs can be set to 0, it is reset to the correct value in {@link
+      * #visitEnd()}). The element_value_pairs array is filled incrementally in the various visit()
+      * methods.
+      *
+      * <p>Note: as an exception to the above rules, for AnnotationDefault attributes (which contain a
+      * single element_value by definition), this ByteVector is initially empty when passed to the
+      * constructor, and {@link #numElementValuePairsOffset} is set to -1.
+      */
+    private final ByteVector annotation;
+
+    /**
+      * The offset in {@link #annotation} where {@link #numElementValuePairs} must be stored (or -1 for
+      * the case of AnnotationDefault attributes).
+      */
+    private final int numElementValuePairsOffset;
+
+    /** The number of element value pairs visited so far. */
+    private int numElementValuePairs;
+
+    /**
+      * The previous AnnotationWriter. This field is used to store the list of annotations of a
+      * Runtime[In]Visible[Type]Annotations attribute. It is unused for nested or array annotations
+      * (annotation values of annotation type), or for AnnotationDefault attributes.
+      */
+    private final AnnotationWriter previousAnnotation;
+
+    /**
+      * The next AnnotationWriter. This field is used to store the list of annotations of a
+      * Runtime[In]Visible[Type]Annotations attribute. It is unused for nested or array annotations
+      * (annotation values of annotation type), or for AnnotationDefault attributes.
+      */
+    private AnnotationWriter nextAnnotation;
+
+    // -----------------------------------------------------------------------------------------------
+    // Constructors and factories
+    // -----------------------------------------------------------------------------------------------
+
+    /**
+      * Constructs a new {@link AnnotationWriter}.
+      *
+      * @param symbolTable where the constants used in this AnnotationWriter must be stored.
+      * @param useNamedValues whether values are named or not. AnnotationDefault and annotation arrays
+      *     use unnamed values.
+      * @param annotation where the 'annotation' or 'type_annotation' JVMS structure corresponding to
+      *     the visited content must be stored. This ByteVector must already contain all the fields of
+      *     the structure except the last one (the element_value_pairs array).
+      * @param previousAnnotation the previously visited annotation of the
+      *     Runtime[In]Visible[Type]Annotations attribute to which this annotation belongs, or
+      *     {@literal null} in other cases (e.g. nested or array annotations).
+      */
+    AnnotationWriter(
+            final SymbolTable symbolTable,
+            final boolean useNamedValues,
+            final ByteVector annotation,
+            final AnnotationWriter previousAnnotation) {
+        super(/* latest api = */ Opcodes.ASM9);
+        this.symbolTable = symbolTable;
+        this.useNamedValues = useNamedValues;
+        this.annotation = annotation;
+        // By hypothesis, num_element_value_pairs is stored in the last unsigned short of 'annotation'.
+        this.numElementValuePairsOffset = annotation.length == 0 ? -1 : annotation.length - 2;
+        this.previousAnnotation = previousAnnotation;
+        if (previousAnnotation != null) {
+            previousAnnotation.nextAnnotation = this;
+        }
+    }
+
+    /**
+      * Creates a new {@link AnnotationWriter} using named values.
+      *
+      * @param symbolTable where the constants used in this AnnotationWriter must be stored.
+      * @param descriptor the class descriptor of the annotation class.
+      * @param previousAnnotation the previously visited annotation of the
+      *     Runtime[In]Visible[Type]Annotations attribute to which this annotation belongs, or
+      *     {@literal null} in other cases (e.g. nested or array annotations).
+      * @return a new {@link AnnotationWriter} for the given annotation descriptor.
+      */
+    static AnnotationWriter create(
+            final SymbolTable symbolTable,
+            final String descriptor,
+            final AnnotationWriter previousAnnotation) {
+        // Create a ByteVector to hold an 'annotation' JVMS structure.
+        // See https://docs.oracle.com/javase/specs/jvms/se9/html/jvms-4.html#jvms-4.7.16.
+        ByteVector annotation = new ByteVector();
+        // Write type_index and reserve space for num_element_value_pairs.
+        annotation.putShort(symbolTable.addConstantUtf8(descriptor)).putShort(0);
+        return new AnnotationWriter(
+                symbolTable, /* useNamedValues = */ true, annotation, previousAnnotation);
+    }
+
+    /**
+      * Creates a new {@link AnnotationWriter} using named values.
+      *
+      * @param symbolTable where the constants used in this AnnotationWriter must be stored.
+      * @param typeRef a reference to the annotated type. The sort of this type reference must be
+      *     {@link TypeReference#CLASS_TYPE_PARAMETER}, {@link
+      *     TypeReference#CLASS_TYPE_PARAMETER_BOUND} or {@link TypeReference#CLASS_EXTENDS}. See
+      *     {@link TypeReference}.
+      * @param typePath the path to the annotated type argument, wildcard bound, array element type, or
+      *     static inner type within 'typeRef'. May be {@literal null} if the annotation targets
+      *     'typeRef' as a whole.
+      * @param descriptor the class descriptor of the annotation class.
+      * @param previousAnnotation the previously visited annotation of the
+      *     Runtime[In]Visible[Type]Annotations attribute to which this annotation belongs, or
+      *     {@literal null} in other cases (e.g. nested or array annotations).
+      * @return a new {@link AnnotationWriter} for the given type annotation reference and descriptor.
+      */
+    static AnnotationWriter create(
+            final SymbolTable symbolTable,
+            final int typeRef,
+            final TypePath typePath,
+            final String descriptor,
+            final AnnotationWriter previousAnnotation) {
+        // Create a ByteVector to hold a 'type_annotation' JVMS structure.
+        // See https://docs.oracle.com/javase/specs/jvms/se9/html/jvms-4.html#jvms-4.7.20.
+        ByteVector typeAnnotation = new ByteVector();
+        // Write target_type, target_info, and target_path.
+        TypeReference.putTarget(typeRef, typeAnnotation);
+        TypePath.put(typePath, typeAnnotation);
+        // Write type_index and reserve space for num_element_value_pairs.
+        typeAnnotation.putShort(symbolTable.addConstantUtf8(descriptor)).putShort(0);
+        return new AnnotationWriter(
+                symbolTable, /* useNamedValues = */ true, typeAnnotation, previousAnnotation);
+    }
+
+    // -----------------------------------------------------------------------------------------------
+    // Implementation of the AnnotationVisitor abstract class
+    // -----------------------------------------------------------------------------------------------
+
+    @Override
+    public void visit(final String name, final Object value) {
+        // Case of an element_value with a const_value_index, class_info_index or array_index field.
+        // See https://docs.oracle.com/javase/specs/jvms/se9/html/jvms-4.html#jvms-4.7.16.1.
+        ++numElementValuePairs;
+        if (useNamedValues) {
+            annotation.putShort(symbolTable.addConstantUtf8(name));
+        }
+        if (value instanceof String) {
+            annotation.put12('s', symbolTable.addConstantUtf8((String) value));
+        } else if (value instanceof Byte) {
+            annotation.put12('B', symbolTable.addConstantInteger(((Byte) value).byteValue()).index);
+        } else if (value instanceof Boolean) {
+            int booleanValue = ((Boolean) value).booleanValue() ? 1 : 0;
+            annotation.put12('Z', symbolTable.addConstantInteger(booleanValue).index);
+        } else if (value instanceof Character) {
+            annotation.put12('C', symbolTable.addConstantInteger(((Character) value).charValue()).index);
+        } else if (value instanceof Short) {
+            annotation.put12('S', symbolTable.addConstantInteger(((Short) value).shortValue()).index);
+        } else if (value instanceof Type) {
+            annotation.put12('c', symbolTable.addConstantUtf8(((Type) value).getDescriptor()));
+        } else if (value instanceof byte[]) {
+            byte[] byteArray = (byte[]) value;
+            annotation.put12('[', byteArray.length);
+            for (byte byteValue : byteArray) {
+                annotation.put12('B', symbolTable.addConstantInteger(byteValue).index);
+            }
+        } else if (value instanceof boolean[]) {
+            boolean[] booleanArray = (boolean[]) value;
+            annotation.put12('[', booleanArray.length);
+            for (boolean booleanValue : booleanArray) {
+                annotation.put12('Z', symbolTable.addConstantInteger(booleanValue ? 1 : 0).index);
+            }
+        } else if (value instanceof short[]) {
+            short[] shortArray = (short[]) value;
+            annotation.put12('[', shortArray.length);
+            for (short shortValue : shortArray) {
+                annotation.put12('S', symbolTable.addConstantInteger(shortValue).index);
+            }
+        } else if (value instanceof char[]) {
+            char[] charArray = (char[]) value;
+            annotation.put12('[', charArray.length);
+            for (char charValue : charArray) {
+                annotation.put12('C', symbolTable.addConstantInteger(charValue).index);
+            }
+        } else if (value instanceof int[]) {
+            int[] intArray = (int[]) value;
+            annotation.put12('[', intArray.length);
+            for (int intValue : intArray) {
+                annotation.put12('I', symbolTable.addConstantInteger(intValue).index);
+            }
+        } else if (value instanceof long[]) {
+            long[] longArray = (long[]) value;
+            annotation.put12('[', longArray.length);
+            for (long longValue : longArray) {
+                annotation.put12('J', symbolTable.addConstantLong(longValue).index);
+            }
+        } else if (value instanceof float[]) {
+            float[] floatArray = (float[]) value;
+            annotation.put12('[', floatArray.length);
+            for (float floatValue : floatArray) {
+                annotation.put12('F', symbolTable.addConstantFloat(floatValue).index);
+            }
+        } else if (value instanceof double[]) {
+            double[] doubleArray = (double[]) value;
+            annotation.put12('[', doubleArray.length);
+            for (double doubleValue : doubleArray) {
+                annotation.put12('D', symbolTable.addConstantDouble(doubleValue).index);
+            }
+        } else {
+            Symbol symbol = symbolTable.addConstant(value);
+            annotation.put12(".s.IFJDCS".charAt(symbol.tag), symbol.index);
+        }
+    }
+
+    @Override
+    public void visitEnum(final String name, final String descriptor, final String value) {
+        // Case of an element_value with an enum_const_value field.
+        // See https://docs.oracle.com/javase/specs/jvms/se9/html/jvms-4.html#jvms-4.7.16.1.
+        ++numElementValuePairs;
+        if (useNamedValues) {
+            annotation.putShort(symbolTable.addConstantUtf8(name));
+        }
+        annotation
+                .put12('e', symbolTable.addConstantUtf8(descriptor))
+                .putShort(symbolTable.addConstantUtf8(value));
+    }
+
+    @Override
+    public AnnotationVisitor visitAnnotation(final String name, final String descriptor) {
+        // Case of an element_value with an annotation_value field.
+        // See https://docs.oracle.com/javase/specs/jvms/se9/html/jvms-4.html#jvms-4.7.16.1.
+        ++numElementValuePairs;
+        if (useNamedValues) {
+            annotation.putShort(symbolTable.addConstantUtf8(name));
+        }
+        // Write tag and type_index, and reserve 2 bytes for num_element_value_pairs.
+        annotation.put12('@', symbolTable.addConstantUtf8(descriptor)).putShort(0);
+        return new AnnotationWriter(symbolTable, /* useNamedValues = */ true, annotation, null);
+    }
+
+    @Override
+    public AnnotationVisitor visitArray(final String name) {
+        // Case of an element_value with an array_value field.
+        // https://docs.oracle.com/javase/specs/jvms/se9/html/jvms-4.html#jvms-4.7.16.1
+        ++numElementValuePairs;
+        if (useNamedValues) {
+            annotation.putShort(symbolTable.addConstantUtf8(name));
+        }
+        // Write tag, and reserve 2 bytes for num_values. Here we take advantage of the fact that the
+        // end of an element_value of array type is similar to the end of an 'annotation' structure: an
+        // unsigned short num_values followed by num_values element_value, versus an unsigned short
+        // num_element_value_pairs, followed by num_element_value_pairs { element_name_index,
+        // element_value } tuples. This allows us to use an AnnotationWriter with unnamed values to
+        // visit the array elements. Its num_element_value_pairs will correspond to the number of array
+        // elements and will be stored in what is in fact num_values.
+        annotation.put12('[', 0);
+        return new AnnotationWriter(symbolTable, /* useNamedValues = */ false, annotation, null);
+    }
+
+    @Override
+    public void visitEnd() {
+        if (numElementValuePairsOffset != -1) {
+            byte[] data = annotation.data;
+            data[numElementValuePairsOffset] = (byte) (numElementValuePairs >>> 8);
+            data[numElementValuePairsOffset + 1] = (byte) numElementValuePairs;
+        }
+    }
+
+    // -----------------------------------------------------------------------------------------------
+    // Utility methods
+    // -----------------------------------------------------------------------------------------------
+
+    /**
+      * Returns the size of a Runtime[In]Visible[Type]Annotations attribute containing this annotation
+      * and all its <i>predecessors</i> (see {@link #previousAnnotation}. Also adds the attribute name
+      * to the constant pool of the class (if not null).
+      *
+      * @param attributeName one of "Runtime[In]Visible[Type]Annotations", or {@literal null}.
+      * @return the size in bytes of a Runtime[In]Visible[Type]Annotations attribute containing this
+      *     annotation and all its predecessors. This includes the size of the attribute_name_index and
+      *     attribute_length fields.
+      */
+    int computeAnnotationsSize(final String attributeName) {
+        if (attributeName != null) {
+            symbolTable.addConstantUtf8(attributeName);
+        }
+        // The attribute_name_index, attribute_length and num_annotations fields use 8 bytes.
+        int attributeSize = 8;
+        AnnotationWriter annotationWriter = this;
+        while (annotationWriter != null) {
+            attributeSize += annotationWriter.annotation.length;
+            annotationWriter = annotationWriter.previousAnnotation;
+        }
+        return attributeSize;
+    }
+
+    /**
+      * Returns the size of the Runtime[In]Visible[Type]Annotations attributes containing the given
+      * annotations and all their <i>predecessors</i> (see {@link #previousAnnotation}. Also adds the
+      * attribute names to the constant pool of the class (if not null).
+      *
+      * @param lastRuntimeVisibleAnnotation The last runtime visible annotation of a field, method or
+      *     class. The previous ones can be accessed with the {@link #previousAnnotation} field. May be
+      *     {@literal null}.
+      * @param lastRuntimeInvisibleAnnotation The last runtime invisible annotation of this a field,
+      *     method or class. The previous ones can be accessed with the {@link #previousAnnotation}
+      *     field. May be {@literal null}.
+      * @param lastRuntimeVisibleTypeAnnotation The last runtime visible type annotation of this a
+      *     field, method or class. The previous ones can be accessed with the {@link
+      *     #previousAnnotation} field. May be {@literal null}.
+      * @param lastRuntimeInvisibleTypeAnnotation The last runtime invisible type annotation of a
+      *     field, method or class field. The previous ones can be accessed with the {@link
+      *     #previousAnnotation} field. May be {@literal null}.
+      * @return the size in bytes of a Runtime[In]Visible[Type]Annotations attribute containing the
+      *     given annotations and all their predecessors. This includes the size of the
+      *     attribute_name_index and attribute_length fields.
+      */
+    static int computeAnnotationsSize(
+            final AnnotationWriter lastRuntimeVisibleAnnotation,
+            final AnnotationWriter lastRuntimeInvisibleAnnotation,
+            final AnnotationWriter lastRuntimeVisibleTypeAnnotation,
+            final AnnotationWriter lastRuntimeInvisibleTypeAnnotation) {
+        int size = 0;
+        if (lastRuntimeVisibleAnnotation != null) {
+            size +=
+                    lastRuntimeVisibleAnnotation.computeAnnotationsSize(
+                            Constants.RUNTIME_VISIBLE_ANNOTATIONS);
+        }
+        if (lastRuntimeInvisibleAnnotation != null) {
+            size +=
+                    lastRuntimeInvisibleAnnotation.computeAnnotationsSize(
+                            Constants.RUNTIME_INVISIBLE_ANNOTATIONS);
+        }
+        if (lastRuntimeVisibleTypeAnnotation != null) {
+            size +=
+                    lastRuntimeVisibleTypeAnnotation.computeAnnotationsSize(
+                            Constants.RUNTIME_VISIBLE_TYPE_ANNOTATIONS);
+        }
+        if (lastRuntimeInvisibleTypeAnnotation != null) {
+            size +=
+                    lastRuntimeInvisibleTypeAnnotation.computeAnnotationsSize(
+                            Constants.RUNTIME_INVISIBLE_TYPE_ANNOTATIONS);
+        }
+        return size;
+    }
+
+    /**
+      * Puts a Runtime[In]Visible[Type]Annotations attribute containing this annotations and all its
+      * <i>predecessors</i> (see {@link #previousAnnotation} in the given ByteVector. Annotations are
+      * put in the same order they have been visited.
+      *
+      * @param attributeNameIndex the constant pool index of the attribute name (one of
+      *     "Runtime[In]Visible[Type]Annotations").
+      * @param output where the attribute must be put.
+      */
+    void putAnnotations(final int attributeNameIndex, final ByteVector output) {
+        int attributeLength = 2; // For num_annotations.
+        int numAnnotations = 0;
+        AnnotationWriter annotationWriter = this;
+        AnnotationWriter firstAnnotation = null;
+        while (annotationWriter != null) {
+            // In case the user forgot to call visitEnd().
+            annotationWriter.visitEnd();
+            attributeLength += annotationWriter.annotation.length;
+            numAnnotations++;
+            firstAnnotation = annotationWriter;
+            annotationWriter = annotationWriter.previousAnnotation;
+        }
+        output.putShort(attributeNameIndex);
+        output.putInt(attributeLength);
+        output.putShort(numAnnotations);
+        annotationWriter = firstAnnotation;
+        while (annotationWriter != null) {
+            output.putByteArray(annotationWriter.annotation.data, 0, annotationWriter.annotation.length);
+            annotationWriter = annotationWriter.nextAnnotation;
+        }
+    }
+
+    /**
+      * Puts the Runtime[In]Visible[Type]Annotations attributes containing the given annotations and
+      * all their <i>predecessors</i> (see {@link #previousAnnotation} in the given ByteVector.
+      * Annotations are put in the same order they have been visited.
+      *
+      * @param symbolTable where the constants used in the AnnotationWriter instances are stored.
+      * @param lastRuntimeVisibleAnnotation The last runtime visible annotation of a field, method or
+      *     class. The previous ones can be accessed with the {@link #previousAnnotation} field. May be
+      *     {@literal null}.
+      * @param lastRuntimeInvisibleAnnotation The last runtime invisible annotation of this a field,
+      *     method or class. The previous ones can be accessed with the {@link #previousAnnotation}
+      *     field. May be {@literal null}.
+      * @param lastRuntimeVisibleTypeAnnotation The last runtime visible type annotation of this a
+      *     field, method or class. The previous ones can be accessed with the {@link
+      *     #previousAnnotation} field. May be {@literal null}.
+      * @param lastRuntimeInvisibleTypeAnnotation The last runtime invisible type annotation of a
+      *     field, method or class field. The previous ones can be accessed with the {@link
+      *     #previousAnnotation} field. May be {@literal null}.
+      * @param output where the attributes must be put.
+      */
+    static void putAnnotations(
+            final SymbolTable symbolTable,
+            final AnnotationWriter lastRuntimeVisibleAnnotation,
+            final AnnotationWriter lastRuntimeInvisibleAnnotation,
+            final AnnotationWriter lastRuntimeVisibleTypeAnnotation,
+            final AnnotationWriter lastRuntimeInvisibleTypeAnnotation,
+            final ByteVector output) {
+        if (lastRuntimeVisibleAnnotation != null) {
+            lastRuntimeVisibleAnnotation.putAnnotations(
+                    symbolTable.addConstantUtf8(Constants.RUNTIME_VISIBLE_ANNOTATIONS), output);
+        }
+        if (lastRuntimeInvisibleAnnotation != null) {
+            lastRuntimeInvisibleAnnotation.putAnnotations(
+                    symbolTable.addConstantUtf8(Constants.RUNTIME_INVISIBLE_ANNOTATIONS), output);
+        }
+        if (lastRuntimeVisibleTypeAnnotation != null) {
+            lastRuntimeVisibleTypeAnnotation.putAnnotations(
+                    symbolTable.addConstantUtf8(Constants.RUNTIME_VISIBLE_TYPE_ANNOTATIONS), output);
+        }
+        if (lastRuntimeInvisibleTypeAnnotation != null) {
+            lastRuntimeInvisibleTypeAnnotation.putAnnotations(
+                    symbolTable.addConstantUtf8(Constants.RUNTIME_INVISIBLE_TYPE_ANNOTATIONS), output);
+        }
+    }
+
+    /**
+      * Returns the size of a Runtime[In]VisibleParameterAnnotations attribute containing all the
+      * annotation lists from the given AnnotationWriter sub-array. Also adds the attribute name to the
+      * constant pool of the class.
+      *
+      * @param attributeName one of "Runtime[In]VisibleParameterAnnotations".
+      * @param annotationWriters an array of AnnotationWriter lists (designated by their <i>last</i>
+      *     element).
+      * @param annotableParameterCount the number of elements in annotationWriters to take into account
+      *     (elements [0..annotableParameterCount[ are taken into account).
+      * @return the size in bytes of a Runtime[In]VisibleParameterAnnotations attribute corresponding
+      *     to the given sub-array of AnnotationWriter lists. This includes the size of the
+      *     attribute_name_index and attribute_length fields.
+      */
+    static int computeParameterAnnotationsSize(
+            final String attributeName,
+            final AnnotationWriter[] annotationWriters,
+            final int annotableParameterCount) {
+        // Note: attributeName is added to the constant pool by the call to computeAnnotationsSize
+        // below. This assumes that there is at least one non-null element in the annotationWriters
+        // sub-array (which is ensured by the lazy instantiation of this array in MethodWriter).
+        // The attribute_name_index, attribute_length and num_parameters fields use 7 bytes, and each
+        // element of the parameter_annotations array uses 2 bytes for its num_annotations field.
+        int attributeSize = 7 + 2 * annotableParameterCount;
+        for (int i = 0; i < annotableParameterCount; ++i) {
+            AnnotationWriter annotationWriter = annotationWriters[i];
+            attributeSize +=
+                    annotationWriter == null ? 0 : annotationWriter.computeAnnotationsSize(attributeName) - 8;
+        }
+        return attributeSize;
+    }
+
+    /**
+      * Puts a Runtime[In]VisibleParameterAnnotations attribute containing all the annotation lists
+      * from the given AnnotationWriter sub-array in the given ByteVector.
+      *
+      * @param attributeNameIndex constant pool index of the attribute name (one of
+      *     Runtime[In]VisibleParameterAnnotations).
+      * @param annotationWriters an array of AnnotationWriter lists (designated by their <i>last</i>
+      *     element).
+      * @param annotableParameterCount the number of elements in annotationWriters to put (elements
+      *     [0..annotableParameterCount[ are put).
+      * @param output where the attribute must be put.
+      */
+    static void putParameterAnnotations(
+            final int attributeNameIndex,
+            final AnnotationWriter[] annotationWriters,
+            final int annotableParameterCount,
+            final ByteVector output) {
+        // The num_parameters field uses 1 byte, and each element of the parameter_annotations array
+        // uses 2 bytes for its num_annotations field.
+        int attributeLength = 1 + 2 * annotableParameterCount;
+        for (int i = 0; i < annotableParameterCount; ++i) {
+            AnnotationWriter annotationWriter = annotationWriters[i];
+            attributeLength +=
+                    annotationWriter == null ? 0 : annotationWriter.computeAnnotationsSize(null) - 8;
+        }
+        output.putShort(attributeNameIndex);
+        output.putInt(attributeLength);
+        output.putByte(annotableParameterCount);
+        for (int i = 0; i < annotableParameterCount; ++i) {
+            AnnotationWriter annotationWriter = annotationWriters[i];
+            AnnotationWriter firstAnnotation = null;
+            int numAnnotations = 0;
+            while (annotationWriter != null) {
+                // In case user the forgot to call visitEnd().
+                annotationWriter.visitEnd();
+                numAnnotations++;
+                firstAnnotation = annotationWriter;
+                annotationWriter = annotationWriter.previousAnnotation;
+            }
+            output.putShort(numAnnotations);
+            annotationWriter = firstAnnotation;
+            while (annotationWriter != null) {
+                output.putByteArray(
+                        annotationWriter.annotation.data, 0, annotationWriter.annotation.length);
+                annotationWriter = annotationWriter.nextAnnotation;
+            }
+        }
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/org/objectweb/asm/Attribute$Set.class b/tests/test_data/std/jdk/internal/org/objectweb/asm/Attribute$Set.class
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HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/org/objectweb/asm/Attribute.java b/tests/test_data/std/jdk/internal/org/objectweb/asm/Attribute.java
new file mode 100644
index 00000000..9c5ce91e
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/org/objectweb/asm/Attribute.java
@@ -0,0 +1,424 @@
+/*
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/*
+ * This file is available under and governed by the GNU General Public
+ * License version 2 only, as published by the Free Software Foundation.
+ * However, the following notice accompanied the original version of this
+ * file:
+ *
+ * ASM: a very small and fast Java bytecode manipulation framework
+ * Copyright (c) 2000-2011 INRIA, France Telecom
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the copyright holders nor the names of its
+ *    contributors may be used to endorse or promote products derived from
+ *    this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+package jdk.internal.org.objectweb.asm;
+
+/**
+ * A non standard class, field, method or Code attribute, as defined in the Java Virtual Machine
+ * Specification (JVMS).
+ *
+ * @see <a href= "https://docs.oracle.com/javase/specs/jvms/se9/html/jvms-4.html#jvms-4.7">JVMS
+ *     4.7</a>
+ * @see <a href= "https://docs.oracle.com/javase/specs/jvms/se9/html/jvms-4.html#jvms-4.7.3">JVMS
+ *     4.7.3</a>
+ * @author Eric Bruneton
+ * @author Eugene Kuleshov
+ */
+public class Attribute {
+
+    /** The type of this attribute, also called its name in the JVMS. */
+    public final String type;
+
+    /**
+      * The raw content of this attribute, only used for unknown attributes (see {@link #isUnknown()}).
+      * The 6 header bytes of the attribute (attribute_name_index and attribute_length) are <i>not</i>
+      * included.
+      */
+    private byte[] content;
+
+    /**
+      * The next attribute in this attribute list (Attribute instances can be linked via this field to
+      * store a list of class, field, method or Code attributes). May be {@literal null}.
+      */
+    Attribute nextAttribute;
+
+    /**
+      * Constructs a new empty attribute.
+      *
+      * @param type the type of the attribute.
+      */
+    protected Attribute(final String type) {
+        this.type = type;
+    }
+
+    /**
+      * Returns {@literal true} if this type of attribute is unknown. This means that the attribute
+      * content can't be parsed to extract constant pool references, labels, etc. Instead, the
+      * attribute content is read as an opaque byte array, and written back as is. This can lead to
+      * invalid attributes, if the content actually contains constant pool references, labels, or other
+      * symbolic references that need to be updated when there are changes to the constant pool, the
+      * method bytecode, etc. The default implementation of this method always returns {@literal true}.
+      *
+      * @return {@literal true} if this type of attribute is unknown.
+      */
+    public boolean isUnknown() {
+        return true;
+    }
+
+    /**
+      * Returns {@literal true} if this type of attribute is a Code attribute.
+      *
+      * @return {@literal true} if this type of attribute is a Code attribute.
+      */
+    public boolean isCodeAttribute() {
+        return false;
+    }
+
+    /**
+      * Returns the labels corresponding to this attribute.
+      *
+      * @return the labels corresponding to this attribute, or {@literal null} if this attribute is not
+      *     a Code attribute that contains labels.
+      */
+    protected Label[] getLabels() {
+        return new Label[0];
+    }
+
+    /**
+      * Reads a {@link #type} attribute. This method must return a <i>new</i> {@link Attribute} object,
+      * of type {@link #type}, corresponding to the 'length' bytes starting at 'offset', in the given
+      * ClassReader.
+      *
+      * @param classReader the class that contains the attribute to be read.
+      * @param offset index of the first byte of the attribute's content in {@link ClassReader}. The 6
+      *     attribute header bytes (attribute_name_index and attribute_length) are not taken into
+      *     account here.
+      * @param length the length of the attribute's content (excluding the 6 attribute header bytes).
+      * @param charBuffer the buffer to be used to call the ClassReader methods requiring a
+      *     'charBuffer' parameter.
+      * @param codeAttributeOffset index of the first byte of content of the enclosing Code attribute
+      *     in {@link ClassReader}, or -1 if the attribute to be read is not a Code attribute. The 6
+      *     attribute header bytes (attribute_name_index and attribute_length) are not taken into
+      *     account here.
+      * @param labels the labels of the method's code, or {@literal null} if the attribute to be read
+      *     is not a Code attribute.
+      * @return a <i>new</i> {@link Attribute} object corresponding to the specified bytes.
+      */
+    protected Attribute read(
+            final ClassReader classReader,
+            final int offset,
+            final int length,
+            final char[] charBuffer,
+            final int codeAttributeOffset,
+            final Label[] labels) {
+        Attribute attribute = new Attribute(type);
+        attribute.content = new byte[length];
+        System.arraycopy(classReader.classFileBuffer, offset, attribute.content, 0, length);
+        return attribute;
+    }
+
+    /**
+      * Returns the byte array form of the content of this attribute. The 6 header bytes
+      * (attribute_name_index and attribute_length) must <i>not</i> be added in the returned
+      * ByteVector.
+      *
+      * @param classWriter the class to which this attribute must be added. This parameter can be used
+      *     to add the items that corresponds to this attribute to the constant pool of this class.
+      * @param code the bytecode of the method corresponding to this Code attribute, or {@literal null}
+      *     if this attribute is not a Code attribute. Corresponds to the 'code' field of the Code
+      *     attribute.
+      * @param codeLength the length of the bytecode of the method corresponding to this code
+      *     attribute, or 0 if this attribute is not a Code attribute. Corresponds to the 'code_length'
+      *     field of the Code attribute.
+      * @param maxStack the maximum stack size of the method corresponding to this Code attribute, or
+      *     -1 if this attribute is not a Code attribute.
+      * @param maxLocals the maximum number of local variables of the method corresponding to this code
+      *     attribute, or -1 if this attribute is not a Code attribute.
+      * @return the byte array form of this attribute.
+      */
+    protected ByteVector write(
+            final ClassWriter classWriter,
+            final byte[] code,
+            final int codeLength,
+            final int maxStack,
+            final int maxLocals) {
+        return new ByteVector(content);
+    }
+
+    /**
+      * Returns the number of attributes of the attribute list that begins with this attribute.
+      *
+      * @return the number of attributes of the attribute list that begins with this attribute.
+      */
+    final int getAttributeCount() {
+        int count = 0;
+        Attribute attribute = this;
+        while (attribute != null) {
+            count += 1;
+            attribute = attribute.nextAttribute;
+        }
+        return count;
+    }
+
+    /**
+      * Returns the total size in bytes of all the attributes in the attribute list that begins with
+      * this attribute. This size includes the 6 header bytes (attribute_name_index and
+      * attribute_length) per attribute. Also adds the attribute type names to the constant pool.
+      *
+      * @param symbolTable where the constants used in the attributes must be stored.
+      * @return the size of all the attributes in this attribute list. This size includes the size of
+      *     the attribute headers.
+      */
+    final int computeAttributesSize(final SymbolTable symbolTable) {
+        final byte[] code = null;
+        final int codeLength = 0;
+        final int maxStack = -1;
+        final int maxLocals = -1;
+        return computeAttributesSize(symbolTable, code, codeLength, maxStack, maxLocals);
+    }
+
+    /**
+      * Returns the total size in bytes of all the attributes in the attribute list that begins with
+      * this attribute. This size includes the 6 header bytes (attribute_name_index and
+      * attribute_length) per attribute. Also adds the attribute type names to the constant pool.
+      *
+      * @param symbolTable where the constants used in the attributes must be stored.
+      * @param code the bytecode of the method corresponding to these Code attributes, or {@literal
+      *     null} if they are not Code attributes. Corresponds to the 'code' field of the Code
+      *     attribute.
+      * @param codeLength the length of the bytecode of the method corresponding to these code
+      *     attributes, or 0 if they are not Code attributes. Corresponds to the 'code_length' field of
+      *     the Code attribute.
+      * @param maxStack the maximum stack size of the method corresponding to these Code attributes, or
+      *     -1 if they are not Code attributes.
+      * @param maxLocals the maximum number of local variables of the method corresponding to these
+      *     Code attributes, or -1 if they are not Code attribute.
+      * @return the size of all the attributes in this attribute list. This size includes the size of
+      *     the attribute headers.
+      */
+    final int computeAttributesSize(
+            final SymbolTable symbolTable,
+            final byte[] code,
+            final int codeLength,
+            final int maxStack,
+            final int maxLocals) {
+        final ClassWriter classWriter = symbolTable.classWriter;
+        int size = 0;
+        Attribute attribute = this;
+        while (attribute != null) {
+            symbolTable.addConstantUtf8(attribute.type);
+            size += 6 + attribute.write(classWriter, code, codeLength, maxStack, maxLocals).length;
+            attribute = attribute.nextAttribute;
+        }
+        return size;
+    }
+
+    /**
+      * Returns the total size in bytes of all the attributes that correspond to the given field,
+      * method or class access flags and signature. This size includes the 6 header bytes
+      * (attribute_name_index and attribute_length) per attribute. Also adds the attribute type names
+      * to the constant pool.
+      *
+      * @param symbolTable where the constants used in the attributes must be stored.
+      * @param accessFlags some field, method or class access flags.
+      * @param signatureIndex the constant pool index of a field, method of class signature.
+      * @return the size of all the attributes in bytes. This size includes the size of the attribute
+      *     headers.
+      */
+    static int computeAttributesSize(
+            final SymbolTable symbolTable, final int accessFlags, final int signatureIndex) {
+        int size = 0;
+        // Before Java 1.5, synthetic fields are represented with a Synthetic attribute.
+        if ((accessFlags & Opcodes.ACC_SYNTHETIC) != 0
+                && symbolTable.getMajorVersion() < Opcodes.V1_5) {
+            // Synthetic attributes always use 6 bytes.
+            symbolTable.addConstantUtf8(Constants.SYNTHETIC);
+            size += 6;
+        }
+        if (signatureIndex != 0) {
+            // Signature attributes always use 8 bytes.
+            symbolTable.addConstantUtf8(Constants.SIGNATURE);
+            size += 8;
+        }
+        // ACC_DEPRECATED is ASM specific, the ClassFile format uses a Deprecated attribute instead.
+        if ((accessFlags & Opcodes.ACC_DEPRECATED) != 0) {
+            // Deprecated attributes always use 6 bytes.
+            symbolTable.addConstantUtf8(Constants.DEPRECATED);
+            size += 6;
+        }
+        return size;
+    }
+
+    /**
+      * Puts all the attributes of the attribute list that begins with this attribute, in the given
+      * byte vector. This includes the 6 header bytes (attribute_name_index and attribute_length) per
+      * attribute.
+      *
+      * @param symbolTable where the constants used in the attributes must be stored.
+      * @param output where the attributes must be written.
+      */
+    final void putAttributes(final SymbolTable symbolTable, final ByteVector output) {
+        final byte[] code = null;
+        final int codeLength = 0;
+        final int maxStack = -1;
+        final int maxLocals = -1;
+        putAttributes(symbolTable, code, codeLength, maxStack, maxLocals, output);
+    }
+
+    /**
+      * Puts all the attributes of the attribute list that begins with this attribute, in the given
+      * byte vector. This includes the 6 header bytes (attribute_name_index and attribute_length) per
+      * attribute.
+      *
+      * @param symbolTable where the constants used in the attributes must be stored.
+      * @param code the bytecode of the method corresponding to these Code attributes, or {@literal
+      *     null} if they are not Code attributes. Corresponds to the 'code' field of the Code
+      *     attribute.
+      * @param codeLength the length of the bytecode of the method corresponding to these code
+      *     attributes, or 0 if they are not Code attributes. Corresponds to the 'code_length' field of
+      *     the Code attribute.
+      * @param maxStack the maximum stack size of the method corresponding to these Code attributes, or
+      *     -1 if they are not Code attributes.
+      * @param maxLocals the maximum number of local variables of the method corresponding to these
+      *     Code attributes, or -1 if they are not Code attribute.
+      * @param output where the attributes must be written.
+      */
+    final void putAttributes(
+            final SymbolTable symbolTable,
+            final byte[] code,
+            final int codeLength,
+            final int maxStack,
+            final int maxLocals,
+            final ByteVector output) {
+        final ClassWriter classWriter = symbolTable.classWriter;
+        Attribute attribute = this;
+        while (attribute != null) {
+            ByteVector attributeContent =
+                    attribute.write(classWriter, code, codeLength, maxStack, maxLocals);
+            // Put attribute_name_index and attribute_length.
+            output.putShort(symbolTable.addConstantUtf8(attribute.type)).putInt(attributeContent.length);
+            output.putByteArray(attributeContent.data, 0, attributeContent.length);
+            attribute = attribute.nextAttribute;
+        }
+    }
+
+    /**
+      * Puts all the attributes that correspond to the given field, method or class access flags and
+      * signature, in the given byte vector. This includes the 6 header bytes (attribute_name_index and
+      * attribute_length) per attribute.
+      *
+      * @param symbolTable where the constants used in the attributes must be stored.
+      * @param accessFlags some field, method or class access flags.
+      * @param signatureIndex the constant pool index of a field, method of class signature.
+      * @param output where the attributes must be written.
+      */
+    static void putAttributes(
+            final SymbolTable symbolTable,
+            final int accessFlags,
+            final int signatureIndex,
+            final ByteVector output) {
+        // Before Java 1.5, synthetic fields are represented with a Synthetic attribute.
+        if ((accessFlags & Opcodes.ACC_SYNTHETIC) != 0
+                && symbolTable.getMajorVersion() < Opcodes.V1_5) {
+            output.putShort(symbolTable.addConstantUtf8(Constants.SYNTHETIC)).putInt(0);
+        }
+        if (signatureIndex != 0) {
+            output
+                    .putShort(symbolTable.addConstantUtf8(Constants.SIGNATURE))
+                    .putInt(2)
+                    .putShort(signatureIndex);
+        }
+        if ((accessFlags & Opcodes.ACC_DEPRECATED) != 0) {
+            output.putShort(symbolTable.addConstantUtf8(Constants.DEPRECATED)).putInt(0);
+        }
+    }
+
+    /** A set of attribute prototypes (attributes with the same type are considered equal). */
+    static final class Set {
+
+        private static final int SIZE_INCREMENT = 6;
+
+        private int size;
+        private Attribute[] data = new Attribute[SIZE_INCREMENT];
+
+        void addAttributes(final Attribute attributeList) {
+            Attribute attribute = attributeList;
+            while (attribute != null) {
+                if (!contains(attribute)) {
+                    add(attribute);
+                }
+                attribute = attribute.nextAttribute;
+            }
+        }
+
+        Attribute[] toArray() {
+            Attribute[] result = new Attribute[size];
+            System.arraycopy(data, 0, result, 0, size);
+            return result;
+        }
+
+        private boolean contains(final Attribute attribute) {
+            for (int i = 0; i < size; ++i) {
+                if (data[i].type.equals(attribute.type)) {
+                    return true;
+                }
+            }
+            return false;
+        }
+
+        private void add(final Attribute attribute) {
+            if (size >= data.length) {
+                Attribute[] newData = new Attribute[data.length + SIZE_INCREMENT];
+                System.arraycopy(data, 0, newData, 0, size);
+                data = newData;
+            }
+            data[size++] = attribute;
+        }
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/org/objectweb/asm/ByteVector.class b/tests/test_data/std/jdk/internal/org/objectweb/asm/ByteVector.class
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diff --git a/tests/test_data/std/jdk/internal/org/objectweb/asm/ByteVector.java b/tests/test_data/std/jdk/internal/org/objectweb/asm/ByteVector.java
new file mode 100644
index 00000000..33a66b2c
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/org/objectweb/asm/ByteVector.java
@@ -0,0 +1,405 @@
+/*
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/*
+ * This file is available under and governed by the GNU General Public
+ * License version 2 only, as published by the Free Software Foundation.
+ * However, the following notice accompanied the original version of this
+ * file:
+ *
+ * ASM: a very small and fast Java bytecode manipulation framework
+ * Copyright (c) 2000-2011 INRIA, France Telecom
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the copyright holders nor the names of its
+ *    contributors may be used to endorse or promote products derived from
+ *    this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+package jdk.internal.org.objectweb.asm;
+
+/**
+ * A dynamically extensible vector of bytes. This class is roughly equivalent to a DataOutputStream
+ * on top of a ByteArrayOutputStream, but is more efficient.
+ *
+ * @author Eric Bruneton
+ */
+public class ByteVector {
+
+    /** The content of this vector. Only the first {@link #length} bytes contain real data. */
+    byte[] data;
+
+    /** The actual number of bytes in this vector. */
+    int length;
+
+    /** Constructs a new {@link ByteVector} with a default initial capacity. */
+    public ByteVector() {
+        data = new byte[64];
+    }
+
+    /**
+      * Constructs a new {@link ByteVector} with the given initial capacity.
+      *
+      * @param initialCapacity the initial capacity of the byte vector to be constructed.
+      */
+    public ByteVector(final int initialCapacity) {
+        data = new byte[initialCapacity];
+    }
+
+    /**
+      * Constructs a new {@link ByteVector} from the given initial data.
+      *
+      * @param data the initial data of the new byte vector.
+      */
+    ByteVector(final byte[] data) {
+        this.data = data;
+        this.length = data.length;
+    }
+
+    /**
+      * Returns the actual number of bytes in this vector.
+      *
+      * @return the actual number of bytes in this vector.
+      */
+    public int size() {
+        return length;
+    }
+
+    /**
+      * Puts a byte into this byte vector. The byte vector is automatically enlarged if necessary.
+      *
+      * @param byteValue a byte.
+      * @return this byte vector.
+      */
+    public ByteVector putByte(final int byteValue) {
+        int currentLength = length;
+        if (currentLength + 1 > data.length) {
+            enlarge(1);
+        }
+        data[currentLength++] = (byte) byteValue;
+        length = currentLength;
+        return this;
+    }
+
+    /**
+      * Puts two bytes into this byte vector. The byte vector is automatically enlarged if necessary.
+      *
+      * @param byteValue1 a byte.
+      * @param byteValue2 another byte.
+      * @return this byte vector.
+      */
+    final ByteVector put11(final int byteValue1, final int byteValue2) {
+        int currentLength = length;
+        if (currentLength + 2 > data.length) {
+            enlarge(2);
+        }
+        byte[] currentData = data;
+        currentData[currentLength++] = (byte) byteValue1;
+        currentData[currentLength++] = (byte) byteValue2;
+        length = currentLength;
+        return this;
+    }
+
+    /**
+      * Puts a short into this byte vector. The byte vector is automatically enlarged if necessary.
+      *
+      * @param shortValue a short.
+      * @return this byte vector.
+      */
+    public ByteVector putShort(final int shortValue) {
+        int currentLength = length;
+        if (currentLength + 2 > data.length) {
+            enlarge(2);
+        }
+        byte[] currentData = data;
+        currentData[currentLength++] = (byte) (shortValue >>> 8);
+        currentData[currentLength++] = (byte) shortValue;
+        length = currentLength;
+        return this;
+    }
+
+    /**
+      * Puts a byte and a short into this byte vector. The byte vector is automatically enlarged if
+      * necessary.
+      *
+      * @param byteValue a byte.
+      * @param shortValue a short.
+      * @return this byte vector.
+      */
+    final ByteVector put12(final int byteValue, final int shortValue) {
+        int currentLength = length;
+        if (currentLength + 3 > data.length) {
+            enlarge(3);
+        }
+        byte[] currentData = data;
+        currentData[currentLength++] = (byte) byteValue;
+        currentData[currentLength++] = (byte) (shortValue >>> 8);
+        currentData[currentLength++] = (byte) shortValue;
+        length = currentLength;
+        return this;
+    }
+
+    /**
+      * Puts two bytes and a short into this byte vector. The byte vector is automatically enlarged if
+      * necessary.
+      *
+      * @param byteValue1 a byte.
+      * @param byteValue2 another byte.
+      * @param shortValue a short.
+      * @return this byte vector.
+      */
+    final ByteVector put112(final int byteValue1, final int byteValue2, final int shortValue) {
+        int currentLength = length;
+        if (currentLength + 4 > data.length) {
+            enlarge(4);
+        }
+        byte[] currentData = data;
+        currentData[currentLength++] = (byte) byteValue1;
+        currentData[currentLength++] = (byte) byteValue2;
+        currentData[currentLength++] = (byte) (shortValue >>> 8);
+        currentData[currentLength++] = (byte) shortValue;
+        length = currentLength;
+        return this;
+    }
+
+    /**
+      * Puts an int into this byte vector. The byte vector is automatically enlarged if necessary.
+      *
+      * @param intValue an int.
+      * @return this byte vector.
+      */
+    public ByteVector putInt(final int intValue) {
+        int currentLength = length;
+        if (currentLength + 4 > data.length) {
+            enlarge(4);
+        }
+        byte[] currentData = data;
+        currentData[currentLength++] = (byte) (intValue >>> 24);
+        currentData[currentLength++] = (byte) (intValue >>> 16);
+        currentData[currentLength++] = (byte) (intValue >>> 8);
+        currentData[currentLength++] = (byte) intValue;
+        length = currentLength;
+        return this;
+    }
+
+    /**
+      * Puts one byte and two shorts into this byte vector. The byte vector is automatically enlarged
+      * if necessary.
+      *
+      * @param byteValue a byte.
+      * @param shortValue1 a short.
+      * @param shortValue2 another short.
+      * @return this byte vector.
+      */
+    final ByteVector put122(final int byteValue, final int shortValue1, final int shortValue2) {
+        int currentLength = length;
+        if (currentLength + 5 > data.length) {
+            enlarge(5);
+        }
+        byte[] currentData = data;
+        currentData[currentLength++] = (byte) byteValue;
+        currentData[currentLength++] = (byte) (shortValue1 >>> 8);
+        currentData[currentLength++] = (byte) shortValue1;
+        currentData[currentLength++] = (byte) (shortValue2 >>> 8);
+        currentData[currentLength++] = (byte) shortValue2;
+        length = currentLength;
+        return this;
+    }
+
+    /**
+      * Puts a long into this byte vector. The byte vector is automatically enlarged if necessary.
+      *
+      * @param longValue a long.
+      * @return this byte vector.
+      */
+    public ByteVector putLong(final long longValue) {
+        int currentLength = length;
+        if (currentLength + 8 > data.length) {
+            enlarge(8);
+        }
+        byte[] currentData = data;
+        int intValue = (int) (longValue >>> 32);
+        currentData[currentLength++] = (byte) (intValue >>> 24);
+        currentData[currentLength++] = (byte) (intValue >>> 16);
+        currentData[currentLength++] = (byte) (intValue >>> 8);
+        currentData[currentLength++] = (byte) intValue;
+        intValue = (int) longValue;
+        currentData[currentLength++] = (byte) (intValue >>> 24);
+        currentData[currentLength++] = (byte) (intValue >>> 16);
+        currentData[currentLength++] = (byte) (intValue >>> 8);
+        currentData[currentLength++] = (byte) intValue;
+        length = currentLength;
+        return this;
+    }
+
+    /**
+      * Puts an UTF8 string into this byte vector. The byte vector is automatically enlarged if
+      * necessary.
+      *
+      * @param stringValue a String whose UTF8 encoded length must be less than 65536.
+      * @return this byte vector.
+      */
+    // DontCheck(AbbreviationAsWordInName): can't be renamed (for backward binary compatibility).
+    public ByteVector putUTF8(final String stringValue) {
+        int charLength = stringValue.length();
+        if (charLength > 65535) {
+            throw new IllegalArgumentException("UTF8 string too large");
+        }
+        int currentLength = length;
+        if (currentLength + 2 + charLength > data.length) {
+            enlarge(2 + charLength);
+        }
+        byte[] currentData = data;
+        // Optimistic algorithm: instead of computing the byte length and then serializing the string
+        // (which requires two loops), we assume the byte length is equal to char length (which is the
+        // most frequent case), and we start serializing the string right away. During the
+        // serialization, if we find that this assumption is wrong, we continue with the general method.
+        currentData[currentLength++] = (byte) (charLength >>> 8);
+        currentData[currentLength++] = (byte) charLength;
+        for (int i = 0; i < charLength; ++i) {
+            char charValue = stringValue.charAt(i);
+            if (charValue >= '\u0001' && charValue <= '\u007F') {
+                currentData[currentLength++] = (byte) charValue;
+            } else {
+                length = currentLength;
+                return encodeUtf8(stringValue, i, 65535);
+            }
+        }
+        length = currentLength;
+        return this;
+    }
+
+    /**
+      * Puts an UTF8 string into this byte vector. The byte vector is automatically enlarged if
+      * necessary. The string length is encoded in two bytes before the encoded characters, if there is
+      * space for that (i.e. if this.length - offset - 2 &gt;= 0).
+      *
+      * @param stringValue the String to encode.
+      * @param offset the index of the first character to encode. The previous characters are supposed
+      *     to have already been encoded, using only one byte per character.
+      * @param maxByteLength the maximum byte length of the encoded string, including the already
+      *     encoded characters.
+      * @return this byte vector.
+      */
+    final ByteVector encodeUtf8(final String stringValue, final int offset, final int maxByteLength) {
+        int charLength = stringValue.length();
+        int byteLength = offset;
+        for (int i = offset; i < charLength; ++i) {
+            char charValue = stringValue.charAt(i);
+            if (charValue >= 0x0001 && charValue <= 0x007F) {
+                byteLength++;
+            } else if (charValue <= 0x07FF) {
+                byteLength += 2;
+            } else {
+                byteLength += 3;
+            }
+        }
+        if (byteLength > maxByteLength) {
+            throw new IllegalArgumentException("UTF8 string too large");
+        }
+        // Compute where 'byteLength' must be stored in 'data', and store it at this location.
+        int byteLengthOffset = length - offset - 2;
+        if (byteLengthOffset >= 0) {
+            data[byteLengthOffset] = (byte) (byteLength >>> 8);
+            data[byteLengthOffset + 1] = (byte) byteLength;
+        }
+        if (length + byteLength - offset > data.length) {
+            enlarge(byteLength - offset);
+        }
+        int currentLength = length;
+        for (int i = offset; i < charLength; ++i) {
+            char charValue = stringValue.charAt(i);
+            if (charValue >= 0x0001 && charValue <= 0x007F) {
+                data[currentLength++] = (byte) charValue;
+            } else if (charValue <= 0x07FF) {
+                data[currentLength++] = (byte) (0xC0 | charValue >> 6 & 0x1F);
+                data[currentLength++] = (byte) (0x80 | charValue & 0x3F);
+            } else {
+                data[currentLength++] = (byte) (0xE0 | charValue >> 12 & 0xF);
+                data[currentLength++] = (byte) (0x80 | charValue >> 6 & 0x3F);
+                data[currentLength++] = (byte) (0x80 | charValue & 0x3F);
+            }
+        }
+        length = currentLength;
+        return this;
+    }
+
+    /**
+      * Puts an array of bytes into this byte vector. The byte vector is automatically enlarged if
+      * necessary.
+      *
+      * @param byteArrayValue an array of bytes. May be {@literal null} to put {@code byteLength} null
+      *     bytes into this byte vector.
+      * @param byteOffset index of the first byte of byteArrayValue that must be copied.
+      * @param byteLength number of bytes of byteArrayValue that must be copied.
+      * @return this byte vector.
+      */
+    public ByteVector putByteArray(
+            final byte[] byteArrayValue, final int byteOffset, final int byteLength) {
+        if (length + byteLength > data.length) {
+            enlarge(byteLength);
+        }
+        if (byteArrayValue != null) {
+            System.arraycopy(byteArrayValue, byteOffset, data, length, byteLength);
+        }
+        length += byteLength;
+        return this;
+    }
+
+    /**
+      * Enlarges this byte vector so that it can receive 'size' more bytes.
+      *
+      * @param size number of additional bytes that this byte vector should be able to receive.
+      */
+    private void enlarge(final int size) {
+        if (length > data.length) {
+            throw new AssertionError("Internal error");
+        }
+        int doubleCapacity = 2 * data.length;
+        int minimalCapacity = length + size;
+        byte[] newData = new byte[doubleCapacity > minimalCapacity ? doubleCapacity : minimalCapacity];
+        System.arraycopy(data, 0, newData, 0, length);
+        data = newData;
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/org/objectweb/asm/ClassReader.class b/tests/test_data/std/jdk/internal/org/objectweb/asm/ClassReader.class
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zh4^6F6CXnR;zQ|!cscz&K1>DTXDg16uww@LI`jx#sfXgbYig!xy4;R{7vQ;3#zK(x
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qt8g?N%?jcOVQL01pBgQ)R>3Nw4KI!J6+4!|DT}i8bNHf;uK0flpNmQW

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HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/org/objectweb/asm/ClassReader.java b/tests/test_data/std/jdk/internal/org/objectweb/asm/ClassReader.java
new file mode 100644
index 00000000..1e31e41e
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/org/objectweb/asm/ClassReader.java
@@ -0,0 +1,3900 @@
+/*
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/*
+ * This file is available under and governed by the GNU General Public
+ * License version 2 only, as published by the Free Software Foundation.
+ * However, the following notice accompanied the original version of this
+ * file:
+ *
+ * ASM: a very small and fast Java bytecode manipulation framework
+ * Copyright (c) 2000-2011 INRIA, France Telecom
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the copyright holders nor the names of its
+ *    contributors may be used to endorse or promote products derived from
+ *    this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+package jdk.internal.org.objectweb.asm;
+
+import java.io.ByteArrayOutputStream;
+import java.io.IOException;
+import java.io.InputStream;
+
+/**
+ * A parser to make a {@link ClassVisitor} visit a ClassFile structure, as defined in the Java
+ * Virtual Machine Specification (JVMS). This class parses the ClassFile content and calls the
+ * appropriate visit methods of a given {@link ClassVisitor} for each field, method and bytecode
+ * instruction encountered.
+ *
+ * @see <a href="https://docs.oracle.com/javase/specs/jvms/se9/html/jvms-4.html">JVMS 4</a>
+ * @author Eric Bruneton
+ * @author Eugene Kuleshov
+ */
+public class ClassReader {
+
+    /**
+      * A flag to skip the Code attributes. If this flag is set the Code attributes are neither parsed
+      * nor visited.
+      */
+    public static final int SKIP_CODE = 1;
+
+    /**
+      * A flag to skip the SourceFile, SourceDebugExtension, LocalVariableTable,
+      * LocalVariableTypeTable, LineNumberTable and MethodParameters attributes. If this flag is set
+      * these attributes are neither parsed nor visited (i.e. {@link ClassVisitor#visitSource}, {@link
+      * MethodVisitor#visitLocalVariable}, {@link MethodVisitor#visitLineNumber} and {@link
+      * MethodVisitor#visitParameter} are not called).
+      */
+    public static final int SKIP_DEBUG = 2;
+
+    /**
+      * A flag to skip the StackMap and StackMapTable attributes. If this flag is set these attributes
+      * are neither parsed nor visited (i.e. {@link MethodVisitor#visitFrame} is not called). This flag
+      * is useful when the {@link ClassWriter#COMPUTE_FRAMES} option is used: it avoids visiting frames
+      * that will be ignored and recomputed from scratch.
+      */
+    public static final int SKIP_FRAMES = 4;
+
+    /**
+      * A flag to expand the stack map frames. By default stack map frames are visited in their
+      * original format (i.e. "expanded" for classes whose version is less than V1_6, and "compressed"
+      * for the other classes). If this flag is set, stack map frames are always visited in expanded
+      * format (this option adds a decompression/compression step in ClassReader and ClassWriter which
+      * degrades performance quite a lot).
+      */
+    public static final int EXPAND_FRAMES = 8;
+
+    /**
+      * A flag to expand the ASM specific instructions into an equivalent sequence of standard bytecode
+      * instructions. When resolving a forward jump it may happen that the signed 2 bytes offset
+      * reserved for it is not sufficient to store the bytecode offset. In this case the jump
+      * instruction is replaced with a temporary ASM specific instruction using an unsigned 2 bytes
+      * offset (see {@link Label#resolve}). This internal flag is used to re-read classes containing
+      * such instructions, in order to replace them with standard instructions. In addition, when this
+      * flag is used, goto_w and jsr_w are <i>not</i> converted into goto and jsr, to make sure that
+      * infinite loops where a goto_w is replaced with a goto in ClassReader and converted back to a
+      * goto_w in ClassWriter cannot occur.
+      */
+    static final int EXPAND_ASM_INSNS = 256;
+
+    /** The maximum size of array to allocate. */
+    private static final int MAX_BUFFER_SIZE = 1024 * 1024;
+
+    /** The size of the temporary byte array used to read class input streams chunk by chunk. */
+    private static final int INPUT_STREAM_DATA_CHUNK_SIZE = 4096;
+
+    /**
+      * A byte array containing the JVMS ClassFile structure to be parsed.
+      *
+      * @deprecated Use {@link #readByte(int)} and the other read methods instead. This field will
+      *     eventually be deleted.
+      */
+    @Deprecated
+    // DontCheck(MemberName): can't be renamed (for backward binary compatibility).
+    public final byte[] b;
+
+    /** The offset in bytes of the ClassFile's access_flags field. */
+    public final int header;
+
+    /**
+      * A byte array containing the JVMS ClassFile structure to be parsed. <i>The content of this array
+      * must not be modified. This field is intended for {@link Attribute} sub classes, and is normally
+      * not needed by class visitors.</i>
+      *
+      * <p>NOTE: the ClassFile structure can start at any offset within this array, i.e. it does not
+      * necessarily start at offset 0. Use {@link #getItem} and {@link #header} to get correct
+      * ClassFile element offsets within this byte array.
+      */
+    final byte[] classFileBuffer;
+
+    /**
+      * The offset in bytes, in {@link #classFileBuffer}, of each cp_info entry of the ClassFile's
+      * constant_pool array, <i>plus one</i>. In other words, the offset of constant pool entry i is
+      * given by cpInfoOffsets[i] - 1, i.e. its cp_info's tag field is given by b[cpInfoOffsets[i] -
+      * 1].
+      */
+    private final int[] cpInfoOffsets;
+
+    /**
+      * The String objects corresponding to the CONSTANT_Utf8 constant pool items. This cache avoids
+      * multiple parsing of a given CONSTANT_Utf8 constant pool item.
+      */
+    private final String[] constantUtf8Values;
+
+    /**
+      * The ConstantDynamic objects corresponding to the CONSTANT_Dynamic constant pool items. This
+      * cache avoids multiple parsing of a given CONSTANT_Dynamic constant pool item.
+      */
+    private final ConstantDynamic[] constantDynamicValues;
+
+    /**
+      * The start offsets in {@link #classFileBuffer} of each element of the bootstrap_methods array
+      * (in the BootstrapMethods attribute).
+      *
+      * @see <a href="https://docs.oracle.com/javase/specs/jvms/se9/html/jvms-4.html#jvms-4.7.23">JVMS
+      *     4.7.23</a>
+      */
+    private final int[] bootstrapMethodOffsets;
+
+    /**
+      * A conservative estimate of the maximum length of the strings contained in the constant pool of
+      * the class.
+      */
+    private final int maxStringLength;
+
+    // -----------------------------------------------------------------------------------------------
+    // Constructors
+    // -----------------------------------------------------------------------------------------------
+
+    /**
+      * Constructs a new {@link ClassReader} object.
+      *
+      * @param classFile the JVMS ClassFile structure to be read.
+      */
+    public ClassReader(final byte[] classFile) {
+        this(classFile, 0, classFile.length);
+    }
+
+    /**
+      * Constructs a new {@link ClassReader} object.
+      *
+      * @param classFileBuffer a byte array containing the JVMS ClassFile structure to be read.
+      * @param classFileOffset the offset in byteBuffer of the first byte of the ClassFile to be read.
+      * @param classFileLength the length in bytes of the ClassFile to be read.
+      */
+    @SuppressWarnings("this-escape")
+    public ClassReader(
+            final byte[] classFileBuffer,
+            final int classFileOffset,
+            final int classFileLength) { // NOPMD(UnusedFormalParameter) used for backward compatibility.
+        this(classFileBuffer, classFileOffset, /* checkClassVersion = */ true);
+    }
+
+    /**
+      * Constructs a new {@link ClassReader} object. <i>This internal constructor must not be exposed
+      * as a public API</i>.
+      *
+      * @param classFileBuffer a byte array containing the JVMS ClassFile structure to be read.
+      * @param classFileOffset the offset in byteBuffer of the first byte of the ClassFile to be read.
+      * @param checkClassVersion whether to check the class version or not.
+      */
+    ClassReader(
+            final byte[] classFileBuffer, final int classFileOffset, final boolean checkClassVersion) {
+        this.classFileBuffer = classFileBuffer;
+        this.b = classFileBuffer;
+        // Check the class' major_version. This field is after the magic and minor_version fields, which
+        // use 4 and 2 bytes respectively.
+        if (checkClassVersion && readShort(classFileOffset + 6) > Opcodes.V23) {
+            throw new IllegalArgumentException(
+                    "Unsupported class file major version " + readShort(classFileOffset + 6));
+        }
+        // Create the constant pool arrays. The constant_pool_count field is after the magic,
+        // minor_version and major_version fields, which use 4, 2 and 2 bytes respectively.
+        int constantPoolCount = readUnsignedShort(classFileOffset + 8);
+        cpInfoOffsets = new int[constantPoolCount];
+        constantUtf8Values = new String[constantPoolCount];
+        // Compute the offset of each constant pool entry, as well as a conservative estimate of the
+        // maximum length of the constant pool strings. The first constant pool entry is after the
+        // magic, minor_version, major_version and constant_pool_count fields, which use 4, 2, 2 and 2
+        // bytes respectively.
+        int currentCpInfoIndex = 1;
+        int currentCpInfoOffset = classFileOffset + 10;
+        int currentMaxStringLength = 0;
+        boolean hasBootstrapMethods = false;
+        boolean hasConstantDynamic = false;
+        // The offset of the other entries depend on the total size of all the previous entries.
+        while (currentCpInfoIndex < constantPoolCount) {
+            cpInfoOffsets[currentCpInfoIndex++] = currentCpInfoOffset + 1;
+            int cpInfoSize;
+            switch (classFileBuffer[currentCpInfoOffset]) {
+                case Symbol.CONSTANT_FIELDREF_TAG:
+                case Symbol.CONSTANT_METHODREF_TAG:
+                case Symbol.CONSTANT_INTERFACE_METHODREF_TAG:
+                case Symbol.CONSTANT_INTEGER_TAG:
+                case Symbol.CONSTANT_FLOAT_TAG:
+                case Symbol.CONSTANT_NAME_AND_TYPE_TAG:
+                    cpInfoSize = 5;
+                    break;
+                case Symbol.CONSTANT_DYNAMIC_TAG:
+                    cpInfoSize = 5;
+                    hasBootstrapMethods = true;
+                    hasConstantDynamic = true;
+                    break;
+                case Symbol.CONSTANT_INVOKE_DYNAMIC_TAG:
+                    cpInfoSize = 5;
+                    hasBootstrapMethods = true;
+                    break;
+                case Symbol.CONSTANT_LONG_TAG:
+                case Symbol.CONSTANT_DOUBLE_TAG:
+                    cpInfoSize = 9;
+                    currentCpInfoIndex++;
+                    break;
+                case Symbol.CONSTANT_UTF8_TAG:
+                    cpInfoSize = 3 + readUnsignedShort(currentCpInfoOffset + 1);
+                    if (cpInfoSize > currentMaxStringLength) {
+                        // The size in bytes of this CONSTANT_Utf8 structure provides a conservative estimate
+                        // of the length in characters of the corresponding string, and is much cheaper to
+                        // compute than this exact length.
+                        currentMaxStringLength = cpInfoSize;
+                    }
+                    break;
+                case Symbol.CONSTANT_METHOD_HANDLE_TAG:
+                    cpInfoSize = 4;
+                    break;
+                case Symbol.CONSTANT_CLASS_TAG:
+                case Symbol.CONSTANT_STRING_TAG:
+                case Symbol.CONSTANT_METHOD_TYPE_TAG:
+                case Symbol.CONSTANT_PACKAGE_TAG:
+                case Symbol.CONSTANT_MODULE_TAG:
+                    cpInfoSize = 3;
+                    break;
+                default:
+                    throw new IllegalArgumentException();
+            }
+            currentCpInfoOffset += cpInfoSize;
+        }
+        maxStringLength = currentMaxStringLength;
+        // The Classfile's access_flags field is just after the last constant pool entry.
+        header = currentCpInfoOffset;
+
+        // Allocate the cache of ConstantDynamic values, if there is at least one.
+        constantDynamicValues = hasConstantDynamic ? new ConstantDynamic[constantPoolCount] : null;
+
+        // Read the BootstrapMethods attribute, if any (only get the offset of each method).
+        bootstrapMethodOffsets =
+                hasBootstrapMethods ? readBootstrapMethodsAttribute(currentMaxStringLength) : null;
+    }
+
+    /**
+      * Constructs a new {@link ClassReader} object.
+      *
+      * @param inputStream an input stream of the JVMS ClassFile structure to be read. This input
+      *     stream must contain nothing more than the ClassFile structure itself. It is read from its
+      *     current position to its end.
+      * @throws IOException if a problem occurs during reading.
+      */
+    public ClassReader(final InputStream inputStream) throws IOException {
+        this(readStream(inputStream, false));
+    }
+
+    /**
+      * Constructs a new {@link ClassReader} object.
+      *
+      * @param className the fully qualified name of the class to be read. The ClassFile structure is
+      *     retrieved with the current class loader's {@link ClassLoader#getSystemResourceAsStream}.
+      * @throws IOException if an exception occurs during reading.
+      */
+    public ClassReader(final String className) throws IOException {
+        this(
+                readStream(
+                        ClassLoader.getSystemResourceAsStream(className.replace('.', '/') + ".class"), true));
+    }
+
+    /**
+      * Reads the given input stream and returns its content as a byte array.
+      *
+      * @param inputStream an input stream.
+      * @param close true to close the input stream after reading.
+      * @return the content of the given input stream.
+      * @throws IOException if a problem occurs during reading.
+      */
+    @SuppressWarnings("PMD.UseTryWithResources")
+    private static byte[] readStream(final InputStream inputStream, final boolean close)
+            throws IOException {
+        if (inputStream == null) {
+            throw new IOException("Class not found");
+        }
+        int bufferSize = computeBufferSize(inputStream);
+        try (ByteArrayOutputStream outputStream = new ByteArrayOutputStream()) {
+            byte[] data = new byte[bufferSize];
+            int bytesRead;
+            int readCount = 0;
+            while ((bytesRead = inputStream.read(data, 0, bufferSize)) != -1) {
+                outputStream.write(data, 0, bytesRead);
+                readCount++;
+            }
+            outputStream.flush();
+            if (readCount == 1) {
+                return data;
+            }
+            return outputStream.toByteArray();
+        } finally {
+            if (close) {
+                inputStream.close();
+            }
+        }
+    }
+
+    private static int computeBufferSize(final InputStream inputStream) throws IOException {
+        int expectedLength = inputStream.available();
+        /*
+          * Some implementations can return 0 while holding available data (e.g. new
+          * FileInputStream("/proc/a_file")). Also in some pathological cases a very small number might
+          * be returned, and in this case we use a default size.
+          */
+        if (expectedLength < 256) {
+            return INPUT_STREAM_DATA_CHUNK_SIZE;
+        }
+        return Math.min(expectedLength, MAX_BUFFER_SIZE);
+    }
+
+    // -----------------------------------------------------------------------------------------------
+    // Accessors
+    // -----------------------------------------------------------------------------------------------
+
+    /**
+      * Returns the class's access flags (see {@link Opcodes}). This value may not reflect Deprecated
+      * and Synthetic flags when bytecode is before 1.5 and those flags are represented by attributes.
+      *
+      * @return the class access flags.
+      * @see ClassVisitor#visit(int, int, String, String, String, String[])
+      */
+    public int getAccess() {
+        return readUnsignedShort(header);
+    }
+
+    /**
+      * Returns the internal name of the class (see {@link Type#getInternalName()}).
+      *
+      * @return the internal class name.
+      * @see ClassVisitor#visit(int, int, String, String, String, String[])
+      */
+    public String getClassName() {
+        // this_class is just after the access_flags field (using 2 bytes).
+        return readClass(header + 2, new char[maxStringLength]);
+    }
+
+    /**
+      * Returns the internal name of the super class (see {@link Type#getInternalName()}). For
+      * interfaces, the super class is {@link Object}.
+      *
+      * @return the internal name of the super class, or {@literal null} for {@link Object} class.
+      * @see ClassVisitor#visit(int, int, String, String, String, String[])
+      */
+    public String getSuperName() {
+        // super_class is after the access_flags and this_class fields (2 bytes each).
+        return readClass(header + 4, new char[maxStringLength]);
+    }
+
+    /**
+      * Returns the internal names of the implemented interfaces (see {@link Type#getInternalName()}).
+      *
+      * @return the internal names of the directly implemented interfaces. Inherited implemented
+      *     interfaces are not returned.
+      * @see ClassVisitor#visit(int, int, String, String, String, String[])
+      */
+    public String[] getInterfaces() {
+        // interfaces_count is after the access_flags, this_class and super_class fields (2 bytes each).
+        int currentOffset = header + 6;
+        int interfacesCount = readUnsignedShort(currentOffset);
+        String[] interfaces = new String[interfacesCount];
+        if (interfacesCount > 0) {
+            char[] charBuffer = new char[maxStringLength];
+            for (int i = 0; i < interfacesCount; ++i) {
+                currentOffset += 2;
+                interfaces[i] = readClass(currentOffset, charBuffer);
+            }
+        }
+        return interfaces;
+    }
+
+    // -----------------------------------------------------------------------------------------------
+    // Public methods
+    // -----------------------------------------------------------------------------------------------
+
+    /**
+      * Makes the given visitor visit the JVMS ClassFile structure passed to the constructor of this
+      * {@link ClassReader}.
+      *
+      * @param classVisitor the visitor that must visit this class.
+      * @param parsingOptions the options to use to parse this class. One or more of {@link
+      *     #SKIP_CODE}, {@link #SKIP_DEBUG}, {@link #SKIP_FRAMES} or {@link #EXPAND_FRAMES}.
+      */
+    public void accept(final ClassVisitor classVisitor, final int parsingOptions) {
+        accept(classVisitor, new Attribute[0], parsingOptions);
+    }
+
+    /**
+      * Makes the given visitor visit the JVMS ClassFile structure passed to the constructor of this
+      * {@link ClassReader}.
+      *
+      * @param classVisitor the visitor that must visit this class.
+      * @param attributePrototypes prototypes of the attributes that must be parsed during the visit of
+      *     the class. Any attribute whose type is not equal to the type of one the prototypes will not
+      *     be parsed: its byte array value will be passed unchanged to the ClassWriter. <i>This may
+      *     corrupt it if this value contains references to the constant pool, or has syntactic or
+      *     semantic links with a class element that has been transformed by a class adapter between
+      *     the reader and the writer</i>.
+      * @param parsingOptions the options to use to parse this class. One or more of {@link
+      *     #SKIP_CODE}, {@link #SKIP_DEBUG}, {@link #SKIP_FRAMES} or {@link #EXPAND_FRAMES}.
+      */
+    public void accept(
+            final ClassVisitor classVisitor,
+            final Attribute[] attributePrototypes,
+            final int parsingOptions) {
+        Context context = new Context();
+        context.attributePrototypes = attributePrototypes;
+        context.parsingOptions = parsingOptions;
+        context.charBuffer = new char[maxStringLength];
+
+        // Read the access_flags, this_class, super_class, interface_count and interfaces fields.
+        char[] charBuffer = context.charBuffer;
+        int currentOffset = header;
+        int accessFlags = readUnsignedShort(currentOffset);
+        String thisClass = readClass(currentOffset + 2, charBuffer);
+        String superClass = readClass(currentOffset + 4, charBuffer);
+        String[] interfaces = new String[readUnsignedShort(currentOffset + 6)];
+        currentOffset += 8;
+        for (int i = 0; i < interfaces.length; ++i) {
+            interfaces[i] = readClass(currentOffset, charBuffer);
+            currentOffset += 2;
+        }
+
+        // Read the class attributes (the variables are ordered as in Section 4.7 of the JVMS).
+        // Attribute offsets exclude the attribute_name_index and attribute_length fields.
+        // - The offset of the InnerClasses attribute, or 0.
+        int innerClassesOffset = 0;
+        // - The offset of the EnclosingMethod attribute, or 0.
+        int enclosingMethodOffset = 0;
+        // - The string corresponding to the Signature attribute, or null.
+        String signature = null;
+        // - The string corresponding to the SourceFile attribute, or null.
+        String sourceFile = null;
+        // - The string corresponding to the SourceDebugExtension attribute, or null.
+        String sourceDebugExtension = null;
+        // - The offset of the RuntimeVisibleAnnotations attribute, or 0.
+        int runtimeVisibleAnnotationsOffset = 0;
+        // - The offset of the RuntimeInvisibleAnnotations attribute, or 0.
+        int runtimeInvisibleAnnotationsOffset = 0;
+        // - The offset of the RuntimeVisibleTypeAnnotations attribute, or 0.
+        int runtimeVisibleTypeAnnotationsOffset = 0;
+        // - The offset of the RuntimeInvisibleTypeAnnotations attribute, or 0.
+        int runtimeInvisibleTypeAnnotationsOffset = 0;
+        // - The offset of the Module attribute, or 0.
+        int moduleOffset = 0;
+        // - The offset of the ModulePackages attribute, or 0.
+        int modulePackagesOffset = 0;
+        // - The string corresponding to the ModuleMainClass attribute, or null.
+        String moduleMainClass = null;
+        // - The string corresponding to the NestHost attribute, or null.
+        String nestHostClass = null;
+        // - The offset of the NestMembers attribute, or 0.
+        int nestMembersOffset = 0;
+        // - The offset of the PermittedSubclasses attribute, or 0
+        int permittedSubclassesOffset = 0;
+        // - The offset of the Record attribute, or 0.
+        int recordOffset = 0;
+        // - The non standard attributes (linked with their {@link Attribute#nextAttribute} field).
+        //   This list in the <i>reverse order</i> or their order in the ClassFile structure.
+        Attribute attributes = null;
+
+        int currentAttributeOffset = getFirstAttributeOffset();
+        for (int i = readUnsignedShort(currentAttributeOffset - 2); i > 0; --i) {
+            // Read the attribute_info's attribute_name and attribute_length fields.
+            String attributeName = readUTF8(currentAttributeOffset, charBuffer);
+            int attributeLength = readInt(currentAttributeOffset + 2);
+            currentAttributeOffset += 6;
+            // The tests are sorted in decreasing frequency order (based on frequencies observed on
+            // typical classes).
+            if (Constants.SOURCE_FILE.equals(attributeName)) {
+                sourceFile = readUTF8(currentAttributeOffset, charBuffer);
+            } else if (Constants.INNER_CLASSES.equals(attributeName)) {
+                innerClassesOffset = currentAttributeOffset;
+            } else if (Constants.ENCLOSING_METHOD.equals(attributeName)) {
+                enclosingMethodOffset = currentAttributeOffset;
+            } else if (Constants.NEST_HOST.equals(attributeName)) {
+                nestHostClass = readClass(currentAttributeOffset, charBuffer);
+            } else if (Constants.NEST_MEMBERS.equals(attributeName)) {
+                nestMembersOffset = currentAttributeOffset;
+            } else if (Constants.PERMITTED_SUBCLASSES.equals(attributeName)) {
+                permittedSubclassesOffset = currentAttributeOffset;
+            } else if (Constants.SIGNATURE.equals(attributeName)) {
+                signature = readUTF8(currentAttributeOffset, charBuffer);
+            } else if (Constants.RUNTIME_VISIBLE_ANNOTATIONS.equals(attributeName)) {
+                runtimeVisibleAnnotationsOffset = currentAttributeOffset;
+            } else if (Constants.RUNTIME_VISIBLE_TYPE_ANNOTATIONS.equals(attributeName)) {
+                runtimeVisibleTypeAnnotationsOffset = currentAttributeOffset;
+            } else if (Constants.DEPRECATED.equals(attributeName)) {
+                accessFlags |= Opcodes.ACC_DEPRECATED;
+            } else if (Constants.SYNTHETIC.equals(attributeName)) {
+                accessFlags |= Opcodes.ACC_SYNTHETIC;
+            } else if (Constants.SOURCE_DEBUG_EXTENSION.equals(attributeName)) {
+                if (attributeLength > classFileBuffer.length - currentAttributeOffset) {
+                    throw new IllegalArgumentException();
+                }
+                sourceDebugExtension =
+                        readUtf(currentAttributeOffset, attributeLength, new char[attributeLength]);
+            } else if (Constants.RUNTIME_INVISIBLE_ANNOTATIONS.equals(attributeName)) {
+                runtimeInvisibleAnnotationsOffset = currentAttributeOffset;
+            } else if (Constants.RUNTIME_INVISIBLE_TYPE_ANNOTATIONS.equals(attributeName)) {
+                runtimeInvisibleTypeAnnotationsOffset = currentAttributeOffset;
+            } else if (Constants.RECORD.equals(attributeName)) {
+                recordOffset = currentAttributeOffset;
+                accessFlags |= Opcodes.ACC_RECORD;
+            } else if (Constants.MODULE.equals(attributeName)) {
+                moduleOffset = currentAttributeOffset;
+            } else if (Constants.MODULE_MAIN_CLASS.equals(attributeName)) {
+                moduleMainClass = readClass(currentAttributeOffset, charBuffer);
+            } else if (Constants.MODULE_PACKAGES.equals(attributeName)) {
+                modulePackagesOffset = currentAttributeOffset;
+            } else if (!Constants.BOOTSTRAP_METHODS.equals(attributeName)) {
+                // The BootstrapMethods attribute is read in the constructor.
+                Attribute attribute =
+                        readAttribute(
+                                attributePrototypes,
+                                attributeName,
+                                currentAttributeOffset,
+                                attributeLength,
+                                charBuffer,
+                                -1,
+                                null);
+                attribute.nextAttribute = attributes;
+                attributes = attribute;
+            }
+            currentAttributeOffset += attributeLength;
+        }
+
+        // Visit the class declaration. The minor_version and major_version fields start 6 bytes before
+        // the first constant pool entry, which itself starts at cpInfoOffsets[1] - 1 (by definition).
+        classVisitor.visit(
+                readInt(cpInfoOffsets[1] - 7), accessFlags, thisClass, signature, superClass, interfaces);
+
+        // Visit the SourceFile and SourceDebugExtenstion attributes.
+        if ((parsingOptions & SKIP_DEBUG) == 0
+                && (sourceFile != null || sourceDebugExtension != null)) {
+            classVisitor.visitSource(sourceFile, sourceDebugExtension);
+        }
+
+        // Visit the Module, ModulePackages and ModuleMainClass attributes.
+        if (moduleOffset != 0) {
+            readModuleAttributes(
+                    classVisitor, context, moduleOffset, modulePackagesOffset, moduleMainClass);
+        }
+
+        // Visit the NestHost attribute.
+        if (nestHostClass != null) {
+            classVisitor.visitNestHost(nestHostClass);
+        }
+
+        // Visit the EnclosingMethod attribute.
+        if (enclosingMethodOffset != 0) {
+            String className = readClass(enclosingMethodOffset, charBuffer);
+            int methodIndex = readUnsignedShort(enclosingMethodOffset + 2);
+            String name = methodIndex == 0 ? null : readUTF8(cpInfoOffsets[methodIndex], charBuffer);
+            String type = methodIndex == 0 ? null : readUTF8(cpInfoOffsets[methodIndex] + 2, charBuffer);
+            classVisitor.visitOuterClass(className, name, type);
+        }
+
+        // Visit the RuntimeVisibleAnnotations attribute.
+        if (runtimeVisibleAnnotationsOffset != 0) {
+            int numAnnotations = readUnsignedShort(runtimeVisibleAnnotationsOffset);
+            int currentAnnotationOffset = runtimeVisibleAnnotationsOffset + 2;
+            while (numAnnotations-- > 0) {
+                // Parse the type_index field.
+                String annotationDescriptor = readUTF8(currentAnnotationOffset, charBuffer);
+                currentAnnotationOffset += 2;
+                // Parse num_element_value_pairs and element_value_pairs and visit these values.
+                currentAnnotationOffset =
+                        readElementValues(
+                                classVisitor.visitAnnotation(annotationDescriptor, /* visible = */ true),
+                                currentAnnotationOffset,
+                                /* named = */ true,
+                                charBuffer);
+            }
+        }
+
+        // Visit the RuntimeInvisibleAnnotations attribute.
+        if (runtimeInvisibleAnnotationsOffset != 0) {
+            int numAnnotations = readUnsignedShort(runtimeInvisibleAnnotationsOffset);
+            int currentAnnotationOffset = runtimeInvisibleAnnotationsOffset + 2;
+            while (numAnnotations-- > 0) {
+                // Parse the type_index field.
+                String annotationDescriptor = readUTF8(currentAnnotationOffset, charBuffer);
+                currentAnnotationOffset += 2;
+                // Parse num_element_value_pairs and element_value_pairs and visit these values.
+                currentAnnotationOffset =
+                        readElementValues(
+                                classVisitor.visitAnnotation(annotationDescriptor, /* visible = */ false),
+                                currentAnnotationOffset,
+                                /* named = */ true,
+                                charBuffer);
+            }
+        }
+
+        // Visit the RuntimeVisibleTypeAnnotations attribute.
+        if (runtimeVisibleTypeAnnotationsOffset != 0) {
+            int numAnnotations = readUnsignedShort(runtimeVisibleTypeAnnotationsOffset);
+            int currentAnnotationOffset = runtimeVisibleTypeAnnotationsOffset + 2;
+            while (numAnnotations-- > 0) {
+                // Parse the target_type, target_info and target_path fields.
+                currentAnnotationOffset = readTypeAnnotationTarget(context, currentAnnotationOffset);
+                // Parse the type_index field.
+                String annotationDescriptor = readUTF8(currentAnnotationOffset, charBuffer);
+                currentAnnotationOffset += 2;
+                // Parse num_element_value_pairs and element_value_pairs and visit these values.
+                currentAnnotationOffset =
+                        readElementValues(
+                                classVisitor.visitTypeAnnotation(
+                                        context.currentTypeAnnotationTarget,
+                                        context.currentTypeAnnotationTargetPath,
+                                        annotationDescriptor,
+                                        /* visible = */ true),
+                                currentAnnotationOffset,
+                                /* named = */ true,
+                                charBuffer);
+            }
+        }
+
+        // Visit the RuntimeInvisibleTypeAnnotations attribute.
+        if (runtimeInvisibleTypeAnnotationsOffset != 0) {
+            int numAnnotations = readUnsignedShort(runtimeInvisibleTypeAnnotationsOffset);
+            int currentAnnotationOffset = runtimeInvisibleTypeAnnotationsOffset + 2;
+            while (numAnnotations-- > 0) {
+                // Parse the target_type, target_info and target_path fields.
+                currentAnnotationOffset = readTypeAnnotationTarget(context, currentAnnotationOffset);
+                // Parse the type_index field.
+                String annotationDescriptor = readUTF8(currentAnnotationOffset, charBuffer);
+                currentAnnotationOffset += 2;
+                // Parse num_element_value_pairs and element_value_pairs and visit these values.
+                currentAnnotationOffset =
+                        readElementValues(
+                                classVisitor.visitTypeAnnotation(
+                                        context.currentTypeAnnotationTarget,
+                                        context.currentTypeAnnotationTargetPath,
+                                        annotationDescriptor,
+                                        /* visible = */ false),
+                                currentAnnotationOffset,
+                                /* named = */ true,
+                                charBuffer);
+            }
+        }
+
+        // Visit the non standard attributes.
+        while (attributes != null) {
+            // Copy and reset the nextAttribute field so that it can also be used in ClassWriter.
+            Attribute nextAttribute = attributes.nextAttribute;
+            attributes.nextAttribute = null;
+            classVisitor.visitAttribute(attributes);
+            attributes = nextAttribute;
+        }
+
+        // Visit the NestedMembers attribute.
+        if (nestMembersOffset != 0) {
+            int numberOfNestMembers = readUnsignedShort(nestMembersOffset);
+            int currentNestMemberOffset = nestMembersOffset + 2;
+            while (numberOfNestMembers-- > 0) {
+                classVisitor.visitNestMember(readClass(currentNestMemberOffset, charBuffer));
+                currentNestMemberOffset += 2;
+            }
+        }
+
+        // Visit the PermittedSubclasses attribute.
+        if (permittedSubclassesOffset != 0) {
+            int numberOfPermittedSubclasses = readUnsignedShort(permittedSubclassesOffset);
+            int currentPermittedSubclassesOffset = permittedSubclassesOffset + 2;
+            while (numberOfPermittedSubclasses-- > 0) {
+                classVisitor.visitPermittedSubclass(
+                        readClass(currentPermittedSubclassesOffset, charBuffer));
+                currentPermittedSubclassesOffset += 2;
+            }
+        }
+
+        // Visit the InnerClasses attribute.
+        if (innerClassesOffset != 0) {
+            int numberOfClasses = readUnsignedShort(innerClassesOffset);
+            int currentClassesOffset = innerClassesOffset + 2;
+            while (numberOfClasses-- > 0) {
+                classVisitor.visitInnerClass(
+                        readClass(currentClassesOffset, charBuffer),
+                        readClass(currentClassesOffset + 2, charBuffer),
+                        readUTF8(currentClassesOffset + 4, charBuffer),
+                        readUnsignedShort(currentClassesOffset + 6));
+                currentClassesOffset += 8;
+            }
+        }
+
+        // Visit Record components.
+        if (recordOffset != 0) {
+            int recordComponentsCount = readUnsignedShort(recordOffset);
+            recordOffset += 2;
+            while (recordComponentsCount-- > 0) {
+                recordOffset = readRecordComponent(classVisitor, context, recordOffset);
+            }
+        }
+
+        // Visit the fields and methods.
+        int fieldsCount = readUnsignedShort(currentOffset);
+        currentOffset += 2;
+        while (fieldsCount-- > 0) {
+            currentOffset = readField(classVisitor, context, currentOffset);
+        }
+        int methodsCount = readUnsignedShort(currentOffset);
+        currentOffset += 2;
+        while (methodsCount-- > 0) {
+            currentOffset = readMethod(classVisitor, context, currentOffset);
+        }
+
+        // Visit the end of the class.
+        classVisitor.visitEnd();
+    }
+
+    // ----------------------------------------------------------------------------------------------
+    // Methods to parse modules, fields and methods
+    // ----------------------------------------------------------------------------------------------
+
+    /**
+      * Reads the Module, ModulePackages and ModuleMainClass attributes and visit them.
+      *
+      * @param classVisitor the current class visitor
+      * @param context information about the class being parsed.
+      * @param moduleOffset the offset of the Module attribute (excluding the attribute_info's
+      *     attribute_name_index and attribute_length fields).
+      * @param modulePackagesOffset the offset of the ModulePackages attribute (excluding the
+      *     attribute_info's attribute_name_index and attribute_length fields), or 0.
+      * @param moduleMainClass the string corresponding to the ModuleMainClass attribute, or {@literal
+      *     null}.
+      */
+    private void readModuleAttributes(
+            final ClassVisitor classVisitor,
+            final Context context,
+            final int moduleOffset,
+            final int modulePackagesOffset,
+            final String moduleMainClass) {
+        char[] buffer = context.charBuffer;
+
+        // Read the module_name_index, module_flags and module_version_index fields and visit them.
+        int currentOffset = moduleOffset;
+        String moduleName = readModule(currentOffset, buffer);
+        int moduleFlags = readUnsignedShort(currentOffset + 2);
+        String moduleVersion = readUTF8(currentOffset + 4, buffer);
+        currentOffset += 6;
+        ModuleVisitor moduleVisitor = classVisitor.visitModule(moduleName, moduleFlags, moduleVersion);
+        if (moduleVisitor == null) {
+            return;
+        }
+
+        // Visit the ModuleMainClass attribute.
+        if (moduleMainClass != null) {
+            moduleVisitor.visitMainClass(moduleMainClass);
+        }
+
+        // Visit the ModulePackages attribute.
+        if (modulePackagesOffset != 0) {
+            int packageCount = readUnsignedShort(modulePackagesOffset);
+            int currentPackageOffset = modulePackagesOffset + 2;
+            while (packageCount-- > 0) {
+                moduleVisitor.visitPackage(readPackage(currentPackageOffset, buffer));
+                currentPackageOffset += 2;
+            }
+        }
+
+        // Read the 'requires_count' and 'requires' fields.
+        int requiresCount = readUnsignedShort(currentOffset);
+        currentOffset += 2;
+        while (requiresCount-- > 0) {
+            // Read the requires_index, requires_flags and requires_version fields and visit them.
+            String requires = readModule(currentOffset, buffer);
+            int requiresFlags = readUnsignedShort(currentOffset + 2);
+            String requiresVersion = readUTF8(currentOffset + 4, buffer);
+            currentOffset += 6;
+            moduleVisitor.visitRequire(requires, requiresFlags, requiresVersion);
+        }
+
+        // Read the 'exports_count' and 'exports' fields.
+        int exportsCount = readUnsignedShort(currentOffset);
+        currentOffset += 2;
+        while (exportsCount-- > 0) {
+            // Read the exports_index, exports_flags, exports_to_count and exports_to_index fields
+            // and visit them.
+            String exports = readPackage(currentOffset, buffer);
+            int exportsFlags = readUnsignedShort(currentOffset + 2);
+            int exportsToCount = readUnsignedShort(currentOffset + 4);
+            currentOffset += 6;
+            String[] exportsTo = null;
+            if (exportsToCount != 0) {
+                exportsTo = new String[exportsToCount];
+                for (int i = 0; i < exportsToCount; ++i) {
+                    exportsTo[i] = readModule(currentOffset, buffer);
+                    currentOffset += 2;
+                }
+            }
+            moduleVisitor.visitExport(exports, exportsFlags, exportsTo);
+        }
+
+        // Reads the 'opens_count' and 'opens' fields.
+        int opensCount = readUnsignedShort(currentOffset);
+        currentOffset += 2;
+        while (opensCount-- > 0) {
+            // Read the opens_index, opens_flags, opens_to_count and opens_to_index fields and visit them.
+            String opens = readPackage(currentOffset, buffer);
+            int opensFlags = readUnsignedShort(currentOffset + 2);
+            int opensToCount = readUnsignedShort(currentOffset + 4);
+            currentOffset += 6;
+            String[] opensTo = null;
+            if (opensToCount != 0) {
+                opensTo = new String[opensToCount];
+                for (int i = 0; i < opensToCount; ++i) {
+                    opensTo[i] = readModule(currentOffset, buffer);
+                    currentOffset += 2;
+                }
+            }
+            moduleVisitor.visitOpen(opens, opensFlags, opensTo);
+        }
+
+        // Read the 'uses_count' and 'uses' fields.
+        int usesCount = readUnsignedShort(currentOffset);
+        currentOffset += 2;
+        while (usesCount-- > 0) {
+            moduleVisitor.visitUse(readClass(currentOffset, buffer));
+            currentOffset += 2;
+        }
+
+        // Read the 'provides_count' and 'provides' fields.
+        int providesCount = readUnsignedShort(currentOffset);
+        currentOffset += 2;
+        while (providesCount-- > 0) {
+            // Read the provides_index, provides_with_count and provides_with_index fields and visit them.
+            String provides = readClass(currentOffset, buffer);
+            int providesWithCount = readUnsignedShort(currentOffset + 2);
+            currentOffset += 4;
+            String[] providesWith = new String[providesWithCount];
+            for (int i = 0; i < providesWithCount; ++i) {
+                providesWith[i] = readClass(currentOffset, buffer);
+                currentOffset += 2;
+            }
+            moduleVisitor.visitProvide(provides, providesWith);
+        }
+
+        // Visit the end of the module attributes.
+        moduleVisitor.visitEnd();
+    }
+
+    /**
+      * Reads a record component and visit it.
+      *
+      * @param classVisitor the current class visitor
+      * @param context information about the class being parsed.
+      * @param recordComponentOffset the offset of the current record component.
+      * @return the offset of the first byte following the record component.
+      */
+    private int readRecordComponent(
+            final ClassVisitor classVisitor, final Context context, final int recordComponentOffset) {
+        char[] charBuffer = context.charBuffer;
+
+        int currentOffset = recordComponentOffset;
+        String name = readUTF8(currentOffset, charBuffer);
+        String descriptor = readUTF8(currentOffset + 2, charBuffer);
+        currentOffset += 4;
+
+        // Read the record component attributes (the variables are ordered as in Section 4.7 of the
+        // JVMS).
+
+        // Attribute offsets exclude the attribute_name_index and attribute_length fields.
+        // - The string corresponding to the Signature attribute, or null.
+        String signature = null;
+        // - The offset of the RuntimeVisibleAnnotations attribute, or 0.
+        int runtimeVisibleAnnotationsOffset = 0;
+        // - The offset of the RuntimeInvisibleAnnotations attribute, or 0.
+        int runtimeInvisibleAnnotationsOffset = 0;
+        // - The offset of the RuntimeVisibleTypeAnnotations attribute, or 0.
+        int runtimeVisibleTypeAnnotationsOffset = 0;
+        // - The offset of the RuntimeInvisibleTypeAnnotations attribute, or 0.
+        int runtimeInvisibleTypeAnnotationsOffset = 0;
+        // - The non standard attributes (linked with their {@link Attribute#nextAttribute} field).
+        //   This list in the <i>reverse order</i> or their order in the ClassFile structure.
+        Attribute attributes = null;
+
+        int attributesCount = readUnsignedShort(currentOffset);
+        currentOffset += 2;
+        while (attributesCount-- > 0) {
+            // Read the attribute_info's attribute_name and attribute_length fields.
+            String attributeName = readUTF8(currentOffset, charBuffer);
+            int attributeLength = readInt(currentOffset + 2);
+            currentOffset += 6;
+            // The tests are sorted in decreasing frequency order (based on frequencies observed on
+            // typical classes).
+            if (Constants.SIGNATURE.equals(attributeName)) {
+                signature = readUTF8(currentOffset, charBuffer);
+            } else if (Constants.RUNTIME_VISIBLE_ANNOTATIONS.equals(attributeName)) {
+                runtimeVisibleAnnotationsOffset = currentOffset;
+            } else if (Constants.RUNTIME_VISIBLE_TYPE_ANNOTATIONS.equals(attributeName)) {
+                runtimeVisibleTypeAnnotationsOffset = currentOffset;
+            } else if (Constants.RUNTIME_INVISIBLE_ANNOTATIONS.equals(attributeName)) {
+                runtimeInvisibleAnnotationsOffset = currentOffset;
+            } else if (Constants.RUNTIME_INVISIBLE_TYPE_ANNOTATIONS.equals(attributeName)) {
+                runtimeInvisibleTypeAnnotationsOffset = currentOffset;
+            } else {
+                Attribute attribute =
+                        readAttribute(
+                                context.attributePrototypes,
+                                attributeName,
+                                currentOffset,
+                                attributeLength,
+                                charBuffer,
+                                -1,
+                                null);
+                attribute.nextAttribute = attributes;
+                attributes = attribute;
+            }
+            currentOffset += attributeLength;
+        }
+
+        RecordComponentVisitor recordComponentVisitor =
+                classVisitor.visitRecordComponent(name, descriptor, signature);
+        if (recordComponentVisitor == null) {
+            return currentOffset;
+        }
+
+        // Visit the RuntimeVisibleAnnotations attribute.
+        if (runtimeVisibleAnnotationsOffset != 0) {
+            int numAnnotations = readUnsignedShort(runtimeVisibleAnnotationsOffset);
+            int currentAnnotationOffset = runtimeVisibleAnnotationsOffset + 2;
+            while (numAnnotations-- > 0) {
+                // Parse the type_index field.
+                String annotationDescriptor = readUTF8(currentAnnotationOffset, charBuffer);
+                currentAnnotationOffset += 2;
+                // Parse num_element_value_pairs and element_value_pairs and visit these values.
+                currentAnnotationOffset =
+                        readElementValues(
+                                recordComponentVisitor.visitAnnotation(annotationDescriptor, /* visible = */ true),
+                                currentAnnotationOffset,
+                                /* named = */ true,
+                                charBuffer);
+            }
+        }
+
+        // Visit the RuntimeInvisibleAnnotations attribute.
+        if (runtimeInvisibleAnnotationsOffset != 0) {
+            int numAnnotations = readUnsignedShort(runtimeInvisibleAnnotationsOffset);
+            int currentAnnotationOffset = runtimeInvisibleAnnotationsOffset + 2;
+            while (numAnnotations-- > 0) {
+                // Parse the type_index field.
+                String annotationDescriptor = readUTF8(currentAnnotationOffset, charBuffer);
+                currentAnnotationOffset += 2;
+                // Parse num_element_value_pairs and element_value_pairs and visit these values.
+                currentAnnotationOffset =
+                        readElementValues(
+                                recordComponentVisitor.visitAnnotation(annotationDescriptor, /* visible = */ false),
+                                currentAnnotationOffset,
+                                /* named = */ true,
+                                charBuffer);
+            }
+        }
+
+        // Visit the RuntimeVisibleTypeAnnotations attribute.
+        if (runtimeVisibleTypeAnnotationsOffset != 0) {
+            int numAnnotations = readUnsignedShort(runtimeVisibleTypeAnnotationsOffset);
+            int currentAnnotationOffset = runtimeVisibleTypeAnnotationsOffset + 2;
+            while (numAnnotations-- > 0) {
+                // Parse the target_type, target_info and target_path fields.
+                currentAnnotationOffset = readTypeAnnotationTarget(context, currentAnnotationOffset);
+                // Parse the type_index field.
+                String annotationDescriptor = readUTF8(currentAnnotationOffset, charBuffer);
+                currentAnnotationOffset += 2;
+                // Parse num_element_value_pairs and element_value_pairs and visit these values.
+                currentAnnotationOffset =
+                        readElementValues(
+                                recordComponentVisitor.visitTypeAnnotation(
+                                        context.currentTypeAnnotationTarget,
+                                        context.currentTypeAnnotationTargetPath,
+                                        annotationDescriptor,
+                                        /* visible = */ true),
+                                currentAnnotationOffset,
+                                /* named = */ true,
+                                charBuffer);
+            }
+        }
+
+        // Visit the RuntimeInvisibleTypeAnnotations attribute.
+        if (runtimeInvisibleTypeAnnotationsOffset != 0) {
+            int numAnnotations = readUnsignedShort(runtimeInvisibleTypeAnnotationsOffset);
+            int currentAnnotationOffset = runtimeInvisibleTypeAnnotationsOffset + 2;
+            while (numAnnotations-- > 0) {
+                // Parse the target_type, target_info and target_path fields.
+                currentAnnotationOffset = readTypeAnnotationTarget(context, currentAnnotationOffset);
+                // Parse the type_index field.
+                String annotationDescriptor = readUTF8(currentAnnotationOffset, charBuffer);
+                currentAnnotationOffset += 2;
+                // Parse num_element_value_pairs and element_value_pairs and visit these values.
+                currentAnnotationOffset =
+                        readElementValues(
+                                recordComponentVisitor.visitTypeAnnotation(
+                                        context.currentTypeAnnotationTarget,
+                                        context.currentTypeAnnotationTargetPath,
+                                        annotationDescriptor,
+                                        /* visible = */ false),
+                                currentAnnotationOffset,
+                                /* named = */ true,
+                                charBuffer);
+            }
+        }
+
+        // Visit the non standard attributes.
+        while (attributes != null) {
+            // Copy and reset the nextAttribute field so that it can also be used in FieldWriter.
+            Attribute nextAttribute = attributes.nextAttribute;
+            attributes.nextAttribute = null;
+            recordComponentVisitor.visitAttribute(attributes);
+            attributes = nextAttribute;
+        }
+
+        // Visit the end of the field.
+        recordComponentVisitor.visitEnd();
+        return currentOffset;
+    }
+
+    /**
+      * Reads a JVMS field_info structure and makes the given visitor visit it.
+      *
+      * @param classVisitor the visitor that must visit the field.
+      * @param context information about the class being parsed.
+      * @param fieldInfoOffset the start offset of the field_info structure.
+      * @return the offset of the first byte following the field_info structure.
+      */
+    private int readField(
+            final ClassVisitor classVisitor, final Context context, final int fieldInfoOffset) {
+        char[] charBuffer = context.charBuffer;
+
+        // Read the access_flags, name_index and descriptor_index fields.
+        int currentOffset = fieldInfoOffset;
+        int accessFlags = readUnsignedShort(currentOffset);
+        String name = readUTF8(currentOffset + 2, charBuffer);
+        String descriptor = readUTF8(currentOffset + 4, charBuffer);
+        currentOffset += 6;
+
+        // Read the field attributes (the variables are ordered as in Section 4.7 of the JVMS).
+        // Attribute offsets exclude the attribute_name_index and attribute_length fields.
+        // - The value corresponding to the ConstantValue attribute, or null.
+        Object constantValue = null;
+        // - The string corresponding to the Signature attribute, or null.
+        String signature = null;
+        // - The offset of the RuntimeVisibleAnnotations attribute, or 0.
+        int runtimeVisibleAnnotationsOffset = 0;
+        // - The offset of the RuntimeInvisibleAnnotations attribute, or 0.
+        int runtimeInvisibleAnnotationsOffset = 0;
+        // - The offset of the RuntimeVisibleTypeAnnotations attribute, or 0.
+        int runtimeVisibleTypeAnnotationsOffset = 0;
+        // - The offset of the RuntimeInvisibleTypeAnnotations attribute, or 0.
+        int runtimeInvisibleTypeAnnotationsOffset = 0;
+        // - The non standard attributes (linked with their {@link Attribute#nextAttribute} field).
+        //   This list in the <i>reverse order</i> or their order in the ClassFile structure.
+        Attribute attributes = null;
+
+        int attributesCount = readUnsignedShort(currentOffset);
+        currentOffset += 2;
+        while (attributesCount-- > 0) {
+            // Read the attribute_info's attribute_name and attribute_length fields.
+            String attributeName = readUTF8(currentOffset, charBuffer);
+            int attributeLength = readInt(currentOffset + 2);
+            currentOffset += 6;
+            // The tests are sorted in decreasing frequency order (based on frequencies observed on
+            // typical classes).
+            if (Constants.CONSTANT_VALUE.equals(attributeName)) {
+                int constantvalueIndex = readUnsignedShort(currentOffset);
+                constantValue = constantvalueIndex == 0 ? null : readConst(constantvalueIndex, charBuffer);
+            } else if (Constants.SIGNATURE.equals(attributeName)) {
+                signature = readUTF8(currentOffset, charBuffer);
+            } else if (Constants.DEPRECATED.equals(attributeName)) {
+                accessFlags |= Opcodes.ACC_DEPRECATED;
+            } else if (Constants.SYNTHETIC.equals(attributeName)) {
+                accessFlags |= Opcodes.ACC_SYNTHETIC;
+            } else if (Constants.RUNTIME_VISIBLE_ANNOTATIONS.equals(attributeName)) {
+                runtimeVisibleAnnotationsOffset = currentOffset;
+            } else if (Constants.RUNTIME_VISIBLE_TYPE_ANNOTATIONS.equals(attributeName)) {
+                runtimeVisibleTypeAnnotationsOffset = currentOffset;
+            } else if (Constants.RUNTIME_INVISIBLE_ANNOTATIONS.equals(attributeName)) {
+                runtimeInvisibleAnnotationsOffset = currentOffset;
+            } else if (Constants.RUNTIME_INVISIBLE_TYPE_ANNOTATIONS.equals(attributeName)) {
+                runtimeInvisibleTypeAnnotationsOffset = currentOffset;
+            } else {
+                Attribute attribute =
+                        readAttribute(
+                                context.attributePrototypes,
+                                attributeName,
+                                currentOffset,
+                                attributeLength,
+                                charBuffer,
+                                -1,
+                                null);
+                attribute.nextAttribute = attributes;
+                attributes = attribute;
+            }
+            currentOffset += attributeLength;
+        }
+
+        // Visit the field declaration.
+        FieldVisitor fieldVisitor =
+                classVisitor.visitField(accessFlags, name, descriptor, signature, constantValue);
+        if (fieldVisitor == null) {
+            return currentOffset;
+        }
+
+        // Visit the RuntimeVisibleAnnotations attribute.
+        if (runtimeVisibleAnnotationsOffset != 0) {
+            int numAnnotations = readUnsignedShort(runtimeVisibleAnnotationsOffset);
+            int currentAnnotationOffset = runtimeVisibleAnnotationsOffset + 2;
+            while (numAnnotations-- > 0) {
+                // Parse the type_index field.
+                String annotationDescriptor = readUTF8(currentAnnotationOffset, charBuffer);
+                currentAnnotationOffset += 2;
+                // Parse num_element_value_pairs and element_value_pairs and visit these values.
+                currentAnnotationOffset =
+                        readElementValues(
+                                fieldVisitor.visitAnnotation(annotationDescriptor, /* visible = */ true),
+                                currentAnnotationOffset,
+                                /* named = */ true,
+                                charBuffer);
+            }
+        }
+
+        // Visit the RuntimeInvisibleAnnotations attribute.
+        if (runtimeInvisibleAnnotationsOffset != 0) {
+            int numAnnotations = readUnsignedShort(runtimeInvisibleAnnotationsOffset);
+            int currentAnnotationOffset = runtimeInvisibleAnnotationsOffset + 2;
+            while (numAnnotations-- > 0) {
+                // Parse the type_index field.
+                String annotationDescriptor = readUTF8(currentAnnotationOffset, charBuffer);
+                currentAnnotationOffset += 2;
+                // Parse num_element_value_pairs and element_value_pairs and visit these values.
+                currentAnnotationOffset =
+                        readElementValues(
+                                fieldVisitor.visitAnnotation(annotationDescriptor, /* visible = */ false),
+                                currentAnnotationOffset,
+                                /* named = */ true,
+                                charBuffer);
+            }
+        }
+
+        // Visit the RuntimeVisibleTypeAnnotations attribute.
+        if (runtimeVisibleTypeAnnotationsOffset != 0) {
+            int numAnnotations = readUnsignedShort(runtimeVisibleTypeAnnotationsOffset);
+            int currentAnnotationOffset = runtimeVisibleTypeAnnotationsOffset + 2;
+            while (numAnnotations-- > 0) {
+                // Parse the target_type, target_info and target_path fields.
+                currentAnnotationOffset = readTypeAnnotationTarget(context, currentAnnotationOffset);
+                // Parse the type_index field.
+                String annotationDescriptor = readUTF8(currentAnnotationOffset, charBuffer);
+                currentAnnotationOffset += 2;
+                // Parse num_element_value_pairs and element_value_pairs and visit these values.
+                currentAnnotationOffset =
+                        readElementValues(
+                                fieldVisitor.visitTypeAnnotation(
+                                        context.currentTypeAnnotationTarget,
+                                        context.currentTypeAnnotationTargetPath,
+                                        annotationDescriptor,
+                                        /* visible = */ true),
+                                currentAnnotationOffset,
+                                /* named = */ true,
+                                charBuffer);
+            }
+        }
+
+        // Visit the RuntimeInvisibleTypeAnnotations attribute.
+        if (runtimeInvisibleTypeAnnotationsOffset != 0) {
+            int numAnnotations = readUnsignedShort(runtimeInvisibleTypeAnnotationsOffset);
+            int currentAnnotationOffset = runtimeInvisibleTypeAnnotationsOffset + 2;
+            while (numAnnotations-- > 0) {
+                // Parse the target_type, target_info and target_path fields.
+                currentAnnotationOffset = readTypeAnnotationTarget(context, currentAnnotationOffset);
+                // Parse the type_index field.
+                String annotationDescriptor = readUTF8(currentAnnotationOffset, charBuffer);
+                currentAnnotationOffset += 2;
+                // Parse num_element_value_pairs and element_value_pairs and visit these values.
+                currentAnnotationOffset =
+                        readElementValues(
+                                fieldVisitor.visitTypeAnnotation(
+                                        context.currentTypeAnnotationTarget,
+                                        context.currentTypeAnnotationTargetPath,
+                                        annotationDescriptor,
+                                        /* visible = */ false),
+                                currentAnnotationOffset,
+                                /* named = */ true,
+                                charBuffer);
+            }
+        }
+
+        // Visit the non standard attributes.
+        while (attributes != null) {
+            // Copy and reset the nextAttribute field so that it can also be used in FieldWriter.
+            Attribute nextAttribute = attributes.nextAttribute;
+            attributes.nextAttribute = null;
+            fieldVisitor.visitAttribute(attributes);
+            attributes = nextAttribute;
+        }
+
+        // Visit the end of the field.
+        fieldVisitor.visitEnd();
+        return currentOffset;
+    }
+
+    /**
+      * Reads a JVMS method_info structure and makes the given visitor visit it.
+      *
+      * @param classVisitor the visitor that must visit the method.
+      * @param context information about the class being parsed.
+      * @param methodInfoOffset the start offset of the method_info structure.
+      * @return the offset of the first byte following the method_info structure.
+      */
+    private int readMethod(
+            final ClassVisitor classVisitor, final Context context, final int methodInfoOffset) {
+        char[] charBuffer = context.charBuffer;
+
+        // Read the access_flags, name_index and descriptor_index fields.
+        int currentOffset = methodInfoOffset;
+        context.currentMethodAccessFlags = readUnsignedShort(currentOffset);
+        context.currentMethodName = readUTF8(currentOffset + 2, charBuffer);
+        context.currentMethodDescriptor = readUTF8(currentOffset + 4, charBuffer);
+        currentOffset += 6;
+
+        // Read the method attributes (the variables are ordered as in Section 4.7 of the JVMS).
+        // Attribute offsets exclude the attribute_name_index and attribute_length fields.
+        // - The offset of the Code attribute, or 0.
+        int codeOffset = 0;
+        // - The offset of the Exceptions attribute, or 0.
+        int exceptionsOffset = 0;
+        // - The strings corresponding to the Exceptions attribute, or null.
+        String[] exceptions = null;
+        // - Whether the method has a Synthetic attribute.
+        boolean synthetic = false;
+        // - The constant pool index contained in the Signature attribute, or 0.
+        int signatureIndex = 0;
+        // - The offset of the RuntimeVisibleAnnotations attribute, or 0.
+        int runtimeVisibleAnnotationsOffset = 0;
+        // - The offset of the RuntimeInvisibleAnnotations attribute, or 0.
+        int runtimeInvisibleAnnotationsOffset = 0;
+        // - The offset of the RuntimeVisibleParameterAnnotations attribute, or 0.
+        int runtimeVisibleParameterAnnotationsOffset = 0;
+        // - The offset of the RuntimeInvisibleParameterAnnotations attribute, or 0.
+        int runtimeInvisibleParameterAnnotationsOffset = 0;
+        // - The offset of the RuntimeVisibleTypeAnnotations attribute, or 0.
+        int runtimeVisibleTypeAnnotationsOffset = 0;
+        // - The offset of the RuntimeInvisibleTypeAnnotations attribute, or 0.
+        int runtimeInvisibleTypeAnnotationsOffset = 0;
+        // - The offset of the AnnotationDefault attribute, or 0.
+        int annotationDefaultOffset = 0;
+        // - The offset of the MethodParameters attribute, or 0.
+        int methodParametersOffset = 0;
+        // - The non standard attributes (linked with their {@link Attribute#nextAttribute} field).
+        //   This list in the <i>reverse order</i> or their order in the ClassFile structure.
+        Attribute attributes = null;
+
+        int attributesCount = readUnsignedShort(currentOffset);
+        currentOffset += 2;
+        while (attributesCount-- > 0) {
+            // Read the attribute_info's attribute_name and attribute_length fields.
+            String attributeName = readUTF8(currentOffset, charBuffer);
+            int attributeLength = readInt(currentOffset + 2);
+            currentOffset += 6;
+            // The tests are sorted in decreasing frequency order (based on frequencies observed on
+            // typical classes).
+            if (Constants.CODE.equals(attributeName)) {
+                if ((context.parsingOptions & SKIP_CODE) == 0) {
+                    codeOffset = currentOffset;
+                }
+            } else if (Constants.EXCEPTIONS.equals(attributeName)) {
+                exceptionsOffset = currentOffset;
+                exceptions = new String[readUnsignedShort(exceptionsOffset)];
+                int currentExceptionOffset = exceptionsOffset + 2;
+                for (int i = 0; i < exceptions.length; ++i) {
+                    exceptions[i] = readClass(currentExceptionOffset, charBuffer);
+                    currentExceptionOffset += 2;
+                }
+            } else if (Constants.SIGNATURE.equals(attributeName)) {
+                signatureIndex = readUnsignedShort(currentOffset);
+            } else if (Constants.DEPRECATED.equals(attributeName)) {
+                context.currentMethodAccessFlags |= Opcodes.ACC_DEPRECATED;
+            } else if (Constants.RUNTIME_VISIBLE_ANNOTATIONS.equals(attributeName)) {
+                runtimeVisibleAnnotationsOffset = currentOffset;
+            } else if (Constants.RUNTIME_VISIBLE_TYPE_ANNOTATIONS.equals(attributeName)) {
+                runtimeVisibleTypeAnnotationsOffset = currentOffset;
+            } else if (Constants.ANNOTATION_DEFAULT.equals(attributeName)) {
+                annotationDefaultOffset = currentOffset;
+            } else if (Constants.SYNTHETIC.equals(attributeName)) {
+                synthetic = true;
+                context.currentMethodAccessFlags |= Opcodes.ACC_SYNTHETIC;
+            } else if (Constants.RUNTIME_INVISIBLE_ANNOTATIONS.equals(attributeName)) {
+                runtimeInvisibleAnnotationsOffset = currentOffset;
+            } else if (Constants.RUNTIME_INVISIBLE_TYPE_ANNOTATIONS.equals(attributeName)) {
+                runtimeInvisibleTypeAnnotationsOffset = currentOffset;
+            } else if (Constants.RUNTIME_VISIBLE_PARAMETER_ANNOTATIONS.equals(attributeName)) {
+                runtimeVisibleParameterAnnotationsOffset = currentOffset;
+            } else if (Constants.RUNTIME_INVISIBLE_PARAMETER_ANNOTATIONS.equals(attributeName)) {
+                runtimeInvisibleParameterAnnotationsOffset = currentOffset;
+            } else if (Constants.METHOD_PARAMETERS.equals(attributeName)) {
+                methodParametersOffset = currentOffset;
+            } else {
+                Attribute attribute =
+                        readAttribute(
+                                context.attributePrototypes,
+                                attributeName,
+                                currentOffset,
+                                attributeLength,
+                                charBuffer,
+                                -1,
+                                null);
+                attribute.nextAttribute = attributes;
+                attributes = attribute;
+            }
+            currentOffset += attributeLength;
+        }
+
+        // Visit the method declaration.
+        MethodVisitor methodVisitor =
+                classVisitor.visitMethod(
+                        context.currentMethodAccessFlags,
+                        context.currentMethodName,
+                        context.currentMethodDescriptor,
+                        signatureIndex == 0 ? null : readUtf(signatureIndex, charBuffer),
+                        exceptions);
+        if (methodVisitor == null) {
+            return currentOffset;
+        }
+
+        // If the returned MethodVisitor is in fact a MethodWriter, it means there is no method
+        // adapter between the reader and the writer. In this case, it might be possible to copy
+        // the method attributes directly into the writer. If so, return early without visiting
+        // the content of these attributes.
+        if (methodVisitor instanceof MethodWriter) {
+            MethodWriter methodWriter = (MethodWriter) methodVisitor;
+            if (methodWriter.canCopyMethodAttributes(
+                    this,
+                    synthetic,
+                    (context.currentMethodAccessFlags & Opcodes.ACC_DEPRECATED) != 0,
+                    readUnsignedShort(methodInfoOffset + 4),
+                    signatureIndex,
+                    exceptionsOffset)) {
+                methodWriter.setMethodAttributesSource(methodInfoOffset, currentOffset - methodInfoOffset);
+                return currentOffset;
+            }
+        }
+
+        // Visit the MethodParameters attribute.
+        if (methodParametersOffset != 0 && (context.parsingOptions & SKIP_DEBUG) == 0) {
+            int parametersCount = readByte(methodParametersOffset);
+            int currentParameterOffset = methodParametersOffset + 1;
+            while (parametersCount-- > 0) {
+                // Read the name_index and access_flags fields and visit them.
+                methodVisitor.visitParameter(
+                        readUTF8(currentParameterOffset, charBuffer),
+                        readUnsignedShort(currentParameterOffset + 2));
+                currentParameterOffset += 4;
+            }
+        }
+
+        // Visit the AnnotationDefault attribute.
+        if (annotationDefaultOffset != 0) {
+            AnnotationVisitor annotationVisitor = methodVisitor.visitAnnotationDefault();
+            readElementValue(annotationVisitor, annotationDefaultOffset, null, charBuffer);
+            if (annotationVisitor != null) {
+                annotationVisitor.visitEnd();
+            }
+        }
+
+        // Visit the RuntimeVisibleAnnotations attribute.
+        if (runtimeVisibleAnnotationsOffset != 0) {
+            int numAnnotations = readUnsignedShort(runtimeVisibleAnnotationsOffset);
+            int currentAnnotationOffset = runtimeVisibleAnnotationsOffset + 2;
+            while (numAnnotations-- > 0) {
+                // Parse the type_index field.
+                String annotationDescriptor = readUTF8(currentAnnotationOffset, charBuffer);
+                currentAnnotationOffset += 2;
+                // Parse num_element_value_pairs and element_value_pairs and visit these values.
+                currentAnnotationOffset =
+                        readElementValues(
+                                methodVisitor.visitAnnotation(annotationDescriptor, /* visible = */ true),
+                                currentAnnotationOffset,
+                                /* named = */ true,
+                                charBuffer);
+            }
+        }
+
+        // Visit the RuntimeInvisibleAnnotations attribute.
+        if (runtimeInvisibleAnnotationsOffset != 0) {
+            int numAnnotations = readUnsignedShort(runtimeInvisibleAnnotationsOffset);
+            int currentAnnotationOffset = runtimeInvisibleAnnotationsOffset + 2;
+            while (numAnnotations-- > 0) {
+                // Parse the type_index field.
+                String annotationDescriptor = readUTF8(currentAnnotationOffset, charBuffer);
+                currentAnnotationOffset += 2;
+                // Parse num_element_value_pairs and element_value_pairs and visit these values.
+                currentAnnotationOffset =
+                        readElementValues(
+                                methodVisitor.visitAnnotation(annotationDescriptor, /* visible = */ false),
+                                currentAnnotationOffset,
+                                /* named = */ true,
+                                charBuffer);
+            }
+        }
+
+        // Visit the RuntimeVisibleTypeAnnotations attribute.
+        if (runtimeVisibleTypeAnnotationsOffset != 0) {
+            int numAnnotations = readUnsignedShort(runtimeVisibleTypeAnnotationsOffset);
+            int currentAnnotationOffset = runtimeVisibleTypeAnnotationsOffset + 2;
+            while (numAnnotations-- > 0) {
+                // Parse the target_type, target_info and target_path fields.
+                currentAnnotationOffset = readTypeAnnotationTarget(context, currentAnnotationOffset);
+                // Parse the type_index field.
+                String annotationDescriptor = readUTF8(currentAnnotationOffset, charBuffer);
+                currentAnnotationOffset += 2;
+                // Parse num_element_value_pairs and element_value_pairs and visit these values.
+                currentAnnotationOffset =
+                        readElementValues(
+                                methodVisitor.visitTypeAnnotation(
+                                        context.currentTypeAnnotationTarget,
+                                        context.currentTypeAnnotationTargetPath,
+                                        annotationDescriptor,
+                                        /* visible = */ true),
+                                currentAnnotationOffset,
+                                /* named = */ true,
+                                charBuffer);
+            }
+        }
+
+        // Visit the RuntimeInvisibleTypeAnnotations attribute.
+        if (runtimeInvisibleTypeAnnotationsOffset != 0) {
+            int numAnnotations = readUnsignedShort(runtimeInvisibleTypeAnnotationsOffset);
+            int currentAnnotationOffset = runtimeInvisibleTypeAnnotationsOffset + 2;
+            while (numAnnotations-- > 0) {
+                // Parse the target_type, target_info and target_path fields.
+                currentAnnotationOffset = readTypeAnnotationTarget(context, currentAnnotationOffset);
+                // Parse the type_index field.
+                String annotationDescriptor = readUTF8(currentAnnotationOffset, charBuffer);
+                currentAnnotationOffset += 2;
+                // Parse num_element_value_pairs and element_value_pairs and visit these values.
+                currentAnnotationOffset =
+                        readElementValues(
+                                methodVisitor.visitTypeAnnotation(
+                                        context.currentTypeAnnotationTarget,
+                                        context.currentTypeAnnotationTargetPath,
+                                        annotationDescriptor,
+                                        /* visible = */ false),
+                                currentAnnotationOffset,
+                                /* named = */ true,
+                                charBuffer);
+            }
+        }
+
+        // Visit the RuntimeVisibleParameterAnnotations attribute.
+        if (runtimeVisibleParameterAnnotationsOffset != 0) {
+            readParameterAnnotations(
+                    methodVisitor, context, runtimeVisibleParameterAnnotationsOffset, /* visible = */ true);
+        }
+
+        // Visit the RuntimeInvisibleParameterAnnotations attribute.
+        if (runtimeInvisibleParameterAnnotationsOffset != 0) {
+            readParameterAnnotations(
+                    methodVisitor,
+                    context,
+                    runtimeInvisibleParameterAnnotationsOffset,
+                    /* visible = */ false);
+        }
+
+        // Visit the non standard attributes.
+        while (attributes != null) {
+            // Copy and reset the nextAttribute field so that it can also be used in MethodWriter.
+            Attribute nextAttribute = attributes.nextAttribute;
+            attributes.nextAttribute = null;
+            methodVisitor.visitAttribute(attributes);
+            attributes = nextAttribute;
+        }
+
+        // Visit the Code attribute.
+        if (codeOffset != 0) {
+            methodVisitor.visitCode();
+            readCode(methodVisitor, context, codeOffset);
+        }
+
+        // Visit the end of the method.
+        methodVisitor.visitEnd();
+        return currentOffset;
+    }
+
+    // ----------------------------------------------------------------------------------------------
+    // Methods to parse a Code attribute
+    // ----------------------------------------------------------------------------------------------
+
+    /**
+      * Reads a JVMS 'Code' attribute and makes the given visitor visit it.
+      *
+      * @param methodVisitor the visitor that must visit the Code attribute.
+      * @param context information about the class being parsed.
+      * @param codeOffset the start offset in {@link #classFileBuffer} of the Code attribute, excluding
+      *     its attribute_name_index and attribute_length fields.
+      */
+    private void readCode(
+            final MethodVisitor methodVisitor, final Context context, final int codeOffset) {
+        int currentOffset = codeOffset;
+
+        // Read the max_stack, max_locals and code_length fields.
+        final byte[] classBuffer = classFileBuffer;
+        final char[] charBuffer = context.charBuffer;
+        final int maxStack = readUnsignedShort(currentOffset);
+        final int maxLocals = readUnsignedShort(currentOffset + 2);
+        final int codeLength = readInt(currentOffset + 4);
+        currentOffset += 8;
+        if (codeLength > classFileBuffer.length - currentOffset) {
+            throw new IllegalArgumentException();
+        }
+
+        // Read the bytecode 'code' array to create a label for each referenced instruction.
+        final int bytecodeStartOffset = currentOffset;
+        final int bytecodeEndOffset = currentOffset + codeLength;
+        final Label[] labels = context.currentMethodLabels = new Label[codeLength + 1];
+        while (currentOffset < bytecodeEndOffset) {
+            final int bytecodeOffset = currentOffset - bytecodeStartOffset;
+            final int opcode = classBuffer[currentOffset] & 0xFF;
+            switch (opcode) {
+                case Opcodes.NOP:
+                case Opcodes.ACONST_NULL:
+                case Opcodes.ICONST_M1:
+                case Opcodes.ICONST_0:
+                case Opcodes.ICONST_1:
+                case Opcodes.ICONST_2:
+                case Opcodes.ICONST_3:
+                case Opcodes.ICONST_4:
+                case Opcodes.ICONST_5:
+                case Opcodes.LCONST_0:
+                case Opcodes.LCONST_1:
+                case Opcodes.FCONST_0:
+                case Opcodes.FCONST_1:
+                case Opcodes.FCONST_2:
+                case Opcodes.DCONST_0:
+                case Opcodes.DCONST_1:
+                case Opcodes.IALOAD:
+                case Opcodes.LALOAD:
+                case Opcodes.FALOAD:
+                case Opcodes.DALOAD:
+                case Opcodes.AALOAD:
+                case Opcodes.BALOAD:
+                case Opcodes.CALOAD:
+                case Opcodes.SALOAD:
+                case Opcodes.IASTORE:
+                case Opcodes.LASTORE:
+                case Opcodes.FASTORE:
+                case Opcodes.DASTORE:
+                case Opcodes.AASTORE:
+                case Opcodes.BASTORE:
+                case Opcodes.CASTORE:
+                case Opcodes.SASTORE:
+                case Opcodes.POP:
+                case Opcodes.POP2:
+                case Opcodes.DUP:
+                case Opcodes.DUP_X1:
+                case Opcodes.DUP_X2:
+                case Opcodes.DUP2:
+                case Opcodes.DUP2_X1:
+                case Opcodes.DUP2_X2:
+                case Opcodes.SWAP:
+                case Opcodes.IADD:
+                case Opcodes.LADD:
+                case Opcodes.FADD:
+                case Opcodes.DADD:
+                case Opcodes.ISUB:
+                case Opcodes.LSUB:
+                case Opcodes.FSUB:
+                case Opcodes.DSUB:
+                case Opcodes.IMUL:
+                case Opcodes.LMUL:
+                case Opcodes.FMUL:
+                case Opcodes.DMUL:
+                case Opcodes.IDIV:
+                case Opcodes.LDIV:
+                case Opcodes.FDIV:
+                case Opcodes.DDIV:
+                case Opcodes.IREM:
+                case Opcodes.LREM:
+                case Opcodes.FREM:
+                case Opcodes.DREM:
+                case Opcodes.INEG:
+                case Opcodes.LNEG:
+                case Opcodes.FNEG:
+                case Opcodes.DNEG:
+                case Opcodes.ISHL:
+                case Opcodes.LSHL:
+                case Opcodes.ISHR:
+                case Opcodes.LSHR:
+                case Opcodes.IUSHR:
+                case Opcodes.LUSHR:
+                case Opcodes.IAND:
+                case Opcodes.LAND:
+                case Opcodes.IOR:
+                case Opcodes.LOR:
+                case Opcodes.IXOR:
+                case Opcodes.LXOR:
+                case Opcodes.I2L:
+                case Opcodes.I2F:
+                case Opcodes.I2D:
+                case Opcodes.L2I:
+                case Opcodes.L2F:
+                case Opcodes.L2D:
+                case Opcodes.F2I:
+                case Opcodes.F2L:
+                case Opcodes.F2D:
+                case Opcodes.D2I:
+                case Opcodes.D2L:
+                case Opcodes.D2F:
+                case Opcodes.I2B:
+                case Opcodes.I2C:
+                case Opcodes.I2S:
+                case Opcodes.LCMP:
+                case Opcodes.FCMPL:
+                case Opcodes.FCMPG:
+                case Opcodes.DCMPL:
+                case Opcodes.DCMPG:
+                case Opcodes.IRETURN:
+                case Opcodes.LRETURN:
+                case Opcodes.FRETURN:
+                case Opcodes.DRETURN:
+                case Opcodes.ARETURN:
+                case Opcodes.RETURN:
+                case Opcodes.ARRAYLENGTH:
+                case Opcodes.ATHROW:
+                case Opcodes.MONITORENTER:
+                case Opcodes.MONITOREXIT:
+                case Constants.ILOAD_0:
+                case Constants.ILOAD_1:
+                case Constants.ILOAD_2:
+                case Constants.ILOAD_3:
+                case Constants.LLOAD_0:
+                case Constants.LLOAD_1:
+                case Constants.LLOAD_2:
+                case Constants.LLOAD_3:
+                case Constants.FLOAD_0:
+                case Constants.FLOAD_1:
+                case Constants.FLOAD_2:
+                case Constants.FLOAD_3:
+                case Constants.DLOAD_0:
+                case Constants.DLOAD_1:
+                case Constants.DLOAD_2:
+                case Constants.DLOAD_3:
+                case Constants.ALOAD_0:
+                case Constants.ALOAD_1:
+                case Constants.ALOAD_2:
+                case Constants.ALOAD_3:
+                case Constants.ISTORE_0:
+                case Constants.ISTORE_1:
+                case Constants.ISTORE_2:
+                case Constants.ISTORE_3:
+                case Constants.LSTORE_0:
+                case Constants.LSTORE_1:
+                case Constants.LSTORE_2:
+                case Constants.LSTORE_3:
+                case Constants.FSTORE_0:
+                case Constants.FSTORE_1:
+                case Constants.FSTORE_2:
+                case Constants.FSTORE_3:
+                case Constants.DSTORE_0:
+                case Constants.DSTORE_1:
+                case Constants.DSTORE_2:
+                case Constants.DSTORE_3:
+                case Constants.ASTORE_0:
+                case Constants.ASTORE_1:
+                case Constants.ASTORE_2:
+                case Constants.ASTORE_3:
+                    currentOffset += 1;
+                    break;
+                case Opcodes.IFEQ:
+                case Opcodes.IFNE:
+                case Opcodes.IFLT:
+                case Opcodes.IFGE:
+                case Opcodes.IFGT:
+                case Opcodes.IFLE:
+                case Opcodes.IF_ICMPEQ:
+                case Opcodes.IF_ICMPNE:
+                case Opcodes.IF_ICMPLT:
+                case Opcodes.IF_ICMPGE:
+                case Opcodes.IF_ICMPGT:
+                case Opcodes.IF_ICMPLE:
+                case Opcodes.IF_ACMPEQ:
+                case Opcodes.IF_ACMPNE:
+                case Opcodes.GOTO:
+                case Opcodes.JSR:
+                case Opcodes.IFNULL:
+                case Opcodes.IFNONNULL:
+                    createLabel(bytecodeOffset + readShort(currentOffset + 1), labels);
+                    currentOffset += 3;
+                    break;
+                case Constants.ASM_IFEQ:
+                case Constants.ASM_IFNE:
+                case Constants.ASM_IFLT:
+                case Constants.ASM_IFGE:
+                case Constants.ASM_IFGT:
+                case Constants.ASM_IFLE:
+                case Constants.ASM_IF_ICMPEQ:
+                case Constants.ASM_IF_ICMPNE:
+                case Constants.ASM_IF_ICMPLT:
+                case Constants.ASM_IF_ICMPGE:
+                case Constants.ASM_IF_ICMPGT:
+                case Constants.ASM_IF_ICMPLE:
+                case Constants.ASM_IF_ACMPEQ:
+                case Constants.ASM_IF_ACMPNE:
+                case Constants.ASM_GOTO:
+                case Constants.ASM_JSR:
+                case Constants.ASM_IFNULL:
+                case Constants.ASM_IFNONNULL:
+                    createLabel(bytecodeOffset + readUnsignedShort(currentOffset + 1), labels);
+                    currentOffset += 3;
+                    break;
+                case Constants.GOTO_W:
+                case Constants.JSR_W:
+                case Constants.ASM_GOTO_W:
+                    createLabel(bytecodeOffset + readInt(currentOffset + 1), labels);
+                    currentOffset += 5;
+                    break;
+                case Constants.WIDE:
+                    switch (classBuffer[currentOffset + 1] & 0xFF) {
+                        case Opcodes.ILOAD:
+                        case Opcodes.FLOAD:
+                        case Opcodes.ALOAD:
+                        case Opcodes.LLOAD:
+                        case Opcodes.DLOAD:
+                        case Opcodes.ISTORE:
+                        case Opcodes.FSTORE:
+                        case Opcodes.ASTORE:
+                        case Opcodes.LSTORE:
+                        case Opcodes.DSTORE:
+                        case Opcodes.RET:
+                            currentOffset += 4;
+                            break;
+                        case Opcodes.IINC:
+                            currentOffset += 6;
+                            break;
+                        default:
+                            throw new IllegalArgumentException();
+                    }
+                    break;
+                case Opcodes.TABLESWITCH:
+                    // Skip 0 to 3 padding bytes.
+                    currentOffset += 4 - (bytecodeOffset & 3);
+                    // Read the default label and the number of table entries.
+                    createLabel(bytecodeOffset + readInt(currentOffset), labels);
+                    int numTableEntries = readInt(currentOffset + 8) - readInt(currentOffset + 4) + 1;
+                    currentOffset += 12;
+                    // Read the table labels.
+                    while (numTableEntries-- > 0) {
+                        createLabel(bytecodeOffset + readInt(currentOffset), labels);
+                        currentOffset += 4;
+                    }
+                    break;
+                case Opcodes.LOOKUPSWITCH:
+                    // Skip 0 to 3 padding bytes.
+                    currentOffset += 4 - (bytecodeOffset & 3);
+                    // Read the default label and the number of switch cases.
+                    createLabel(bytecodeOffset + readInt(currentOffset), labels);
+                    int numSwitchCases = readInt(currentOffset + 4);
+                    currentOffset += 8;
+                    // Read the switch labels.
+                    while (numSwitchCases-- > 0) {
+                        createLabel(bytecodeOffset + readInt(currentOffset + 4), labels);
+                        currentOffset += 8;
+                    }
+                    break;
+                case Opcodes.ILOAD:
+                case Opcodes.LLOAD:
+                case Opcodes.FLOAD:
+                case Opcodes.DLOAD:
+                case Opcodes.ALOAD:
+                case Opcodes.ISTORE:
+                case Opcodes.LSTORE:
+                case Opcodes.FSTORE:
+                case Opcodes.DSTORE:
+                case Opcodes.ASTORE:
+                case Opcodes.RET:
+                case Opcodes.BIPUSH:
+                case Opcodes.NEWARRAY:
+                case Opcodes.LDC:
+                    currentOffset += 2;
+                    break;
+                case Opcodes.SIPUSH:
+                case Constants.LDC_W:
+                case Constants.LDC2_W:
+                case Opcodes.GETSTATIC:
+                case Opcodes.PUTSTATIC:
+                case Opcodes.GETFIELD:
+                case Opcodes.PUTFIELD:
+                case Opcodes.INVOKEVIRTUAL:
+                case Opcodes.INVOKESPECIAL:
+                case Opcodes.INVOKESTATIC:
+                case Opcodes.NEW:
+                case Opcodes.ANEWARRAY:
+                case Opcodes.CHECKCAST:
+                case Opcodes.INSTANCEOF:
+                case Opcodes.IINC:
+                    currentOffset += 3;
+                    break;
+                case Opcodes.INVOKEINTERFACE:
+                case Opcodes.INVOKEDYNAMIC:
+                    currentOffset += 5;
+                    break;
+                case Opcodes.MULTIANEWARRAY:
+                    currentOffset += 4;
+                    break;
+                default:
+                    throw new IllegalArgumentException();
+            }
+        }
+
+        // Read the 'exception_table_length' and 'exception_table' field to create a label for each
+        // referenced instruction, and to make methodVisitor visit the corresponding try catch blocks.
+        int exceptionTableLength = readUnsignedShort(currentOffset);
+        currentOffset += 2;
+        while (exceptionTableLength-- > 0) {
+            Label start = createLabel(readUnsignedShort(currentOffset), labels);
+            Label end = createLabel(readUnsignedShort(currentOffset + 2), labels);
+            Label handler = createLabel(readUnsignedShort(currentOffset + 4), labels);
+            String catchType = readUTF8(cpInfoOffsets[readUnsignedShort(currentOffset + 6)], charBuffer);
+            currentOffset += 8;
+            methodVisitor.visitTryCatchBlock(start, end, handler, catchType);
+        }
+
+        // Read the Code attributes to create a label for each referenced instruction (the variables
+        // are ordered as in Section 4.7 of the JVMS). Attribute offsets exclude the
+        // attribute_name_index and attribute_length fields.
+        // - The offset of the current 'stack_map_frame' in the StackMap[Table] attribute, or 0.
+        // Initially, this is the offset of the first 'stack_map_frame' entry. Then this offset is
+        // updated after each stack_map_frame is read.
+        int stackMapFrameOffset = 0;
+        // - The end offset of the StackMap[Table] attribute, or 0.
+        int stackMapTableEndOffset = 0;
+        // - Whether the stack map frames are compressed (i.e. in a StackMapTable) or not.
+        boolean compressedFrames = true;
+        // - The offset of the LocalVariableTable attribute, or 0.
+        int localVariableTableOffset = 0;
+        // - The offset of the LocalVariableTypeTable attribute, or 0.
+        int localVariableTypeTableOffset = 0;
+        // - The offset of each 'type_annotation' entry in the RuntimeVisibleTypeAnnotations
+        // attribute, or null.
+        int[] visibleTypeAnnotationOffsets = null;
+        // - The offset of each 'type_annotation' entry in the RuntimeInvisibleTypeAnnotations
+        // attribute, or null.
+        int[] invisibleTypeAnnotationOffsets = null;
+        // - The non standard attributes (linked with their {@link Attribute#nextAttribute} field).
+        //   This list in the <i>reverse order</i> or their order in the ClassFile structure.
+        Attribute attributes = null;
+
+        int attributesCount = readUnsignedShort(currentOffset);
+        currentOffset += 2;
+        while (attributesCount-- > 0) {
+            // Read the attribute_info's attribute_name and attribute_length fields.
+            String attributeName = readUTF8(currentOffset, charBuffer);
+            int attributeLength = readInt(currentOffset + 2);
+            currentOffset += 6;
+            if (Constants.LOCAL_VARIABLE_TABLE.equals(attributeName)) {
+                if ((context.parsingOptions & SKIP_DEBUG) == 0) {
+                    localVariableTableOffset = currentOffset;
+                    // Parse the attribute to find the corresponding (debug only) labels.
+                    int currentLocalVariableTableOffset = currentOffset;
+                    int localVariableTableLength = readUnsignedShort(currentLocalVariableTableOffset);
+                    currentLocalVariableTableOffset += 2;
+                    while (localVariableTableLength-- > 0) {
+                        int startPc = readUnsignedShort(currentLocalVariableTableOffset);
+                        createDebugLabel(startPc, labels);
+                        int length = readUnsignedShort(currentLocalVariableTableOffset + 2);
+                        createDebugLabel(startPc + length, labels);
+                        // Skip the name_index, descriptor_index and index fields (2 bytes each).
+                        currentLocalVariableTableOffset += 10;
+                    }
+                }
+            } else if (Constants.LOCAL_VARIABLE_TYPE_TABLE.equals(attributeName)) {
+                localVariableTypeTableOffset = currentOffset;
+                // Here we do not extract the labels corresponding to the attribute content. We assume they
+                // are the same or a subset of those of the LocalVariableTable attribute.
+            } else if (Constants.LINE_NUMBER_TABLE.equals(attributeName)) {
+                if ((context.parsingOptions & SKIP_DEBUG) == 0) {
+                    // Parse the attribute to find the corresponding (debug only) labels.
+                    int currentLineNumberTableOffset = currentOffset;
+                    int lineNumberTableLength = readUnsignedShort(currentLineNumberTableOffset);
+                    currentLineNumberTableOffset += 2;
+                    while (lineNumberTableLength-- > 0) {
+                        int startPc = readUnsignedShort(currentLineNumberTableOffset);
+                        int lineNumber = readUnsignedShort(currentLineNumberTableOffset + 2);
+                        currentLineNumberTableOffset += 4;
+                        createDebugLabel(startPc, labels);
+                        labels[startPc].addLineNumber(lineNumber);
+                    }
+                }
+            } else if (Constants.RUNTIME_VISIBLE_TYPE_ANNOTATIONS.equals(attributeName)) {
+                visibleTypeAnnotationOffsets =
+                        readTypeAnnotations(methodVisitor, context, currentOffset, /* visible = */ true);
+                // Here we do not extract the labels corresponding to the attribute content. This would
+                // require a full parsing of the attribute, which would need to be repeated when parsing
+                // the bytecode instructions (see below). Instead, the content of the attribute is read one
+                // type annotation at a time (i.e. after a type annotation has been visited, the next type
+                // annotation is read), and the labels it contains are also extracted one annotation at a
+                // time. This assumes that type annotations are ordered by increasing bytecode offset.
+            } else if (Constants.RUNTIME_INVISIBLE_TYPE_ANNOTATIONS.equals(attributeName)) {
+                invisibleTypeAnnotationOffsets =
+                        readTypeAnnotations(methodVisitor, context, currentOffset, /* visible = */ false);
+                // Same comment as above for the RuntimeVisibleTypeAnnotations attribute.
+            } else if (Constants.STACK_MAP_TABLE.equals(attributeName)) {
+                if ((context.parsingOptions & SKIP_FRAMES) == 0) {
+                    stackMapFrameOffset = currentOffset + 2;
+                    stackMapTableEndOffset = currentOffset + attributeLength;
+                }
+                // Here we do not extract the labels corresponding to the attribute content. This would
+                // require a full parsing of the attribute, which would need to be repeated when parsing
+                // the bytecode instructions (see below). Instead, the content of the attribute is read one
+                // frame at a time (i.e. after a frame has been visited, the next frame is read), and the
+                // labels it contains are also extracted one frame at a time. Thanks to the ordering of
+                // frames, having only a "one frame lookahead" is not a problem, i.e. it is not possible to
+                // see an offset smaller than the offset of the current instruction and for which no Label
+                // exist. Except for UNINITIALIZED type offsets. We solve this by parsing the stack map
+                // table without a full decoding (see below).
+            } else if ("StackMap".equals(attributeName)) {
+                if ((context.parsingOptions & SKIP_FRAMES) == 0) {
+                    stackMapFrameOffset = currentOffset + 2;
+                    stackMapTableEndOffset = currentOffset + attributeLength;
+                    compressedFrames = false;
+                }
+                // IMPORTANT! Here we assume that the frames are ordered, as in the StackMapTable attribute,
+                // although this is not guaranteed by the attribute format. This allows an incremental
+                // extraction of the labels corresponding to this attribute (see the comment above for the
+                // StackMapTable attribute).
+            } else {
+                Attribute attribute =
+                        readAttribute(
+                                context.attributePrototypes,
+                                attributeName,
+                                currentOffset,
+                                attributeLength,
+                                charBuffer,
+                                codeOffset,
+                                labels);
+                attribute.nextAttribute = attributes;
+                attributes = attribute;
+            }
+            currentOffset += attributeLength;
+        }
+
+        // Initialize the context fields related to stack map frames, and generate the first
+        // (implicit) stack map frame, if needed.
+        final boolean expandFrames = (context.parsingOptions & EXPAND_FRAMES) != 0;
+        if (stackMapFrameOffset != 0) {
+            // The bytecode offset of the first explicit frame is not offset_delta + 1 but only
+            // offset_delta. Setting the implicit frame offset to -1 allows us to use of the
+            // "offset_delta + 1" rule in all cases.
+            context.currentFrameOffset = -1;
+            context.currentFrameType = 0;
+            context.currentFrameLocalCount = 0;
+            context.currentFrameLocalCountDelta = 0;
+            context.currentFrameLocalTypes = new Object[maxLocals];
+            context.currentFrameStackCount = 0;
+            context.currentFrameStackTypes = new Object[maxStack];
+            if (expandFrames) {
+                computeImplicitFrame(context);
+            }
+            // Find the labels for UNINITIALIZED frame types. Instead of decoding each element of the
+            // stack map table, we look for 3 consecutive bytes that "look like" an UNINITIALIZED type
+            // (tag ITEM_Uninitialized, offset within bytecode bounds, NEW instruction at this offset).
+            // We may find false positives (i.e. not real UNINITIALIZED types), but this should be rare,
+            // and the only consequence will be the creation of an unneeded label. This is better than
+            // creating a label for each NEW instruction, and faster than fully decoding the whole stack
+            // map table.
+            for (int offset = stackMapFrameOffset; offset < stackMapTableEndOffset - 2; ++offset) {
+                if (classBuffer[offset] == Frame.ITEM_UNINITIALIZED) {
+                    int potentialBytecodeOffset = readUnsignedShort(offset + 1);
+                    if (potentialBytecodeOffset >= 0
+                            && potentialBytecodeOffset < codeLength
+                            && (classBuffer[bytecodeStartOffset + potentialBytecodeOffset] & 0xFF)
+                                    == Opcodes.NEW) {
+                        createLabel(potentialBytecodeOffset, labels);
+                    }
+                }
+            }
+        }
+        if (expandFrames && (context.parsingOptions & EXPAND_ASM_INSNS) != 0) {
+            // Expanding the ASM specific instructions can introduce F_INSERT frames, even if the method
+            // does not currently have any frame. These inserted frames must be computed by simulating the
+            // effect of the bytecode instructions, one by one, starting from the implicit first frame.
+            // For this, MethodWriter needs to know maxLocals before the first instruction is visited. To
+            // ensure this, we visit the implicit first frame here (passing only maxLocals - the rest is
+            // computed in MethodWriter).
+            methodVisitor.visitFrame(Opcodes.F_NEW, maxLocals, null, 0, null);
+        }
+
+        // Visit the bytecode instructions. First, introduce state variables for the incremental parsing
+        // of the type annotations.
+
+        // Index of the next runtime visible type annotation to read (in the
+        // visibleTypeAnnotationOffsets array).
+        int currentVisibleTypeAnnotationIndex = 0;
+        // The bytecode offset of the next runtime visible type annotation to read, or -1.
+        int currentVisibleTypeAnnotationBytecodeOffset =
+                getTypeAnnotationBytecodeOffset(visibleTypeAnnotationOffsets, 0);
+        // Index of the next runtime invisible type annotation to read (in the
+        // invisibleTypeAnnotationOffsets array).
+        int currentInvisibleTypeAnnotationIndex = 0;
+        // The bytecode offset of the next runtime invisible type annotation to read, or -1.
+        int currentInvisibleTypeAnnotationBytecodeOffset =
+                getTypeAnnotationBytecodeOffset(invisibleTypeAnnotationOffsets, 0);
+
+        // Whether a F_INSERT stack map frame must be inserted before the current instruction.
+        boolean insertFrame = false;
+
+        // The delta to subtract from a goto_w or jsr_w opcode to get the corresponding goto or jsr
+        // opcode, or 0 if goto_w and jsr_w must be left unchanged (i.e. when expanding ASM specific
+        // instructions).
+        final int wideJumpOpcodeDelta =
+                (context.parsingOptions & EXPAND_ASM_INSNS) == 0 ? Constants.WIDE_JUMP_OPCODE_DELTA : 0;
+
+        currentOffset = bytecodeStartOffset;
+        while (currentOffset < bytecodeEndOffset) {
+            final int currentBytecodeOffset = currentOffset - bytecodeStartOffset;
+            readBytecodeInstructionOffset(currentBytecodeOffset);
+
+            // Visit the label and the line number(s) for this bytecode offset, if any.
+            Label currentLabel = labels[currentBytecodeOffset];
+            if (currentLabel != null) {
+                currentLabel.accept(methodVisitor, (context.parsingOptions & SKIP_DEBUG) == 0);
+            }
+
+            // Visit the stack map frame for this bytecode offset, if any.
+            while (stackMapFrameOffset != 0
+                    && (context.currentFrameOffset == currentBytecodeOffset
+                            || context.currentFrameOffset == -1)) {
+                // If there is a stack map frame for this offset, make methodVisitor visit it, and read the
+                // next stack map frame if there is one.
+                if (context.currentFrameOffset != -1) {
+                    if (!compressedFrames || expandFrames) {
+                        methodVisitor.visitFrame(
+                                Opcodes.F_NEW,
+                                context.currentFrameLocalCount,
+                                context.currentFrameLocalTypes,
+                                context.currentFrameStackCount,
+                                context.currentFrameStackTypes);
+                    } else {
+                        methodVisitor.visitFrame(
+                                context.currentFrameType,
+                                context.currentFrameLocalCountDelta,
+                                context.currentFrameLocalTypes,
+                                context.currentFrameStackCount,
+                                context.currentFrameStackTypes);
+                    }
+                    // Since there is already a stack map frame for this bytecode offset, there is no need to
+                    // insert a new one.
+                    insertFrame = false;
+                }
+                if (stackMapFrameOffset < stackMapTableEndOffset) {
+                    stackMapFrameOffset =
+                            readStackMapFrame(stackMapFrameOffset, compressedFrames, expandFrames, context);
+                } else {
+                    stackMapFrameOffset = 0;
+                }
+            }
+
+            // Insert a stack map frame for this bytecode offset, if requested by setting insertFrame to
+            // true during the previous iteration. The actual frame content is computed in MethodWriter.
+            if (insertFrame) {
+                if ((context.parsingOptions & EXPAND_FRAMES) != 0) {
+                    methodVisitor.visitFrame(Constants.F_INSERT, 0, null, 0, null);
+                }
+                insertFrame = false;
+            }
+
+            // Visit the instruction at this bytecode offset.
+            int opcode = classBuffer[currentOffset] & 0xFF;
+            switch (opcode) {
+                case Opcodes.NOP:
+                case Opcodes.ACONST_NULL:
+                case Opcodes.ICONST_M1:
+                case Opcodes.ICONST_0:
+                case Opcodes.ICONST_1:
+                case Opcodes.ICONST_2:
+                case Opcodes.ICONST_3:
+                case Opcodes.ICONST_4:
+                case Opcodes.ICONST_5:
+                case Opcodes.LCONST_0:
+                case Opcodes.LCONST_1:
+                case Opcodes.FCONST_0:
+                case Opcodes.FCONST_1:
+                case Opcodes.FCONST_2:
+                case Opcodes.DCONST_0:
+                case Opcodes.DCONST_1:
+                case Opcodes.IALOAD:
+                case Opcodes.LALOAD:
+                case Opcodes.FALOAD:
+                case Opcodes.DALOAD:
+                case Opcodes.AALOAD:
+                case Opcodes.BALOAD:
+                case Opcodes.CALOAD:
+                case Opcodes.SALOAD:
+                case Opcodes.IASTORE:
+                case Opcodes.LASTORE:
+                case Opcodes.FASTORE:
+                case Opcodes.DASTORE:
+                case Opcodes.AASTORE:
+                case Opcodes.BASTORE:
+                case Opcodes.CASTORE:
+                case Opcodes.SASTORE:
+                case Opcodes.POP:
+                case Opcodes.POP2:
+                case Opcodes.DUP:
+                case Opcodes.DUP_X1:
+                case Opcodes.DUP_X2:
+                case Opcodes.DUP2:
+                case Opcodes.DUP2_X1:
+                case Opcodes.DUP2_X2:
+                case Opcodes.SWAP:
+                case Opcodes.IADD:
+                case Opcodes.LADD:
+                case Opcodes.FADD:
+                case Opcodes.DADD:
+                case Opcodes.ISUB:
+                case Opcodes.LSUB:
+                case Opcodes.FSUB:
+                case Opcodes.DSUB:
+                case Opcodes.IMUL:
+                case Opcodes.LMUL:
+                case Opcodes.FMUL:
+                case Opcodes.DMUL:
+                case Opcodes.IDIV:
+                case Opcodes.LDIV:
+                case Opcodes.FDIV:
+                case Opcodes.DDIV:
+                case Opcodes.IREM:
+                case Opcodes.LREM:
+                case Opcodes.FREM:
+                case Opcodes.DREM:
+                case Opcodes.INEG:
+                case Opcodes.LNEG:
+                case Opcodes.FNEG:
+                case Opcodes.DNEG:
+                case Opcodes.ISHL:
+                case Opcodes.LSHL:
+                case Opcodes.ISHR:
+                case Opcodes.LSHR:
+                case Opcodes.IUSHR:
+                case Opcodes.LUSHR:
+                case Opcodes.IAND:
+                case Opcodes.LAND:
+                case Opcodes.IOR:
+                case Opcodes.LOR:
+                case Opcodes.IXOR:
+                case Opcodes.LXOR:
+                case Opcodes.I2L:
+                case Opcodes.I2F:
+                case Opcodes.I2D:
+                case Opcodes.L2I:
+                case Opcodes.L2F:
+                case Opcodes.L2D:
+                case Opcodes.F2I:
+                case Opcodes.F2L:
+                case Opcodes.F2D:
+                case Opcodes.D2I:
+                case Opcodes.D2L:
+                case Opcodes.D2F:
+                case Opcodes.I2B:
+                case Opcodes.I2C:
+                case Opcodes.I2S:
+                case Opcodes.LCMP:
+                case Opcodes.FCMPL:
+                case Opcodes.FCMPG:
+                case Opcodes.DCMPL:
+                case Opcodes.DCMPG:
+                case Opcodes.IRETURN:
+                case Opcodes.LRETURN:
+                case Opcodes.FRETURN:
+                case Opcodes.DRETURN:
+                case Opcodes.ARETURN:
+                case Opcodes.RETURN:
+                case Opcodes.ARRAYLENGTH:
+                case Opcodes.ATHROW:
+                case Opcodes.MONITORENTER:
+                case Opcodes.MONITOREXIT:
+                    methodVisitor.visitInsn(opcode);
+                    currentOffset += 1;
+                    break;
+                case Constants.ILOAD_0:
+                case Constants.ILOAD_1:
+                case Constants.ILOAD_2:
+                case Constants.ILOAD_3:
+                case Constants.LLOAD_0:
+                case Constants.LLOAD_1:
+                case Constants.LLOAD_2:
+                case Constants.LLOAD_3:
+                case Constants.FLOAD_0:
+                case Constants.FLOAD_1:
+                case Constants.FLOAD_2:
+                case Constants.FLOAD_3:
+                case Constants.DLOAD_0:
+                case Constants.DLOAD_1:
+                case Constants.DLOAD_2:
+                case Constants.DLOAD_3:
+                case Constants.ALOAD_0:
+                case Constants.ALOAD_1:
+                case Constants.ALOAD_2:
+                case Constants.ALOAD_3:
+                    opcode -= Constants.ILOAD_0;
+                    methodVisitor.visitVarInsn(Opcodes.ILOAD + (opcode >> 2), opcode & 0x3);
+                    currentOffset += 1;
+                    break;
+                case Constants.ISTORE_0:
+                case Constants.ISTORE_1:
+                case Constants.ISTORE_2:
+                case Constants.ISTORE_3:
+                case Constants.LSTORE_0:
+                case Constants.LSTORE_1:
+                case Constants.LSTORE_2:
+                case Constants.LSTORE_3:
+                case Constants.FSTORE_0:
+                case Constants.FSTORE_1:
+                case Constants.FSTORE_2:
+                case Constants.FSTORE_3:
+                case Constants.DSTORE_0:
+                case Constants.DSTORE_1:
+                case Constants.DSTORE_2:
+                case Constants.DSTORE_3:
+                case Constants.ASTORE_0:
+                case Constants.ASTORE_1:
+                case Constants.ASTORE_2:
+                case Constants.ASTORE_3:
+                    opcode -= Constants.ISTORE_0;
+                    methodVisitor.visitVarInsn(Opcodes.ISTORE + (opcode >> 2), opcode & 0x3);
+                    currentOffset += 1;
+                    break;
+                case Opcodes.IFEQ:
+                case Opcodes.IFNE:
+                case Opcodes.IFLT:
+                case Opcodes.IFGE:
+                case Opcodes.IFGT:
+                case Opcodes.IFLE:
+                case Opcodes.IF_ICMPEQ:
+                case Opcodes.IF_ICMPNE:
+                case Opcodes.IF_ICMPLT:
+                case Opcodes.IF_ICMPGE:
+                case Opcodes.IF_ICMPGT:
+                case Opcodes.IF_ICMPLE:
+                case Opcodes.IF_ACMPEQ:
+                case Opcodes.IF_ACMPNE:
+                case Opcodes.GOTO:
+                case Opcodes.JSR:
+                case Opcodes.IFNULL:
+                case Opcodes.IFNONNULL:
+                    methodVisitor.visitJumpInsn(
+                            opcode, labels[currentBytecodeOffset + readShort(currentOffset + 1)]);
+                    currentOffset += 3;
+                    break;
+                case Constants.GOTO_W:
+                case Constants.JSR_W:
+                    methodVisitor.visitJumpInsn(
+                            opcode - wideJumpOpcodeDelta,
+                            labels[currentBytecodeOffset + readInt(currentOffset + 1)]);
+                    currentOffset += 5;
+                    break;
+                case Constants.ASM_IFEQ:
+                case Constants.ASM_IFNE:
+                case Constants.ASM_IFLT:
+                case Constants.ASM_IFGE:
+                case Constants.ASM_IFGT:
+                case Constants.ASM_IFLE:
+                case Constants.ASM_IF_ICMPEQ:
+                case Constants.ASM_IF_ICMPNE:
+                case Constants.ASM_IF_ICMPLT:
+                case Constants.ASM_IF_ICMPGE:
+                case Constants.ASM_IF_ICMPGT:
+                case Constants.ASM_IF_ICMPLE:
+                case Constants.ASM_IF_ACMPEQ:
+                case Constants.ASM_IF_ACMPNE:
+                case Constants.ASM_GOTO:
+                case Constants.ASM_JSR:
+                case Constants.ASM_IFNULL:
+                case Constants.ASM_IFNONNULL:
+                    {
+                        // A forward jump with an offset > 32767. In this case we automatically replace ASM_GOTO
+                        // with GOTO_W, ASM_JSR with JSR_W and ASM_IFxxx <l> with IFNOTxxx <L> GOTO_W <l> L:...,
+                        // where IFNOTxxx is the "opposite" opcode of ASMS_IFxxx (e.g. IFNE for ASM_IFEQ) and
+                        // where <L> designates the instruction just after the GOTO_W.
+                        // First, change the ASM specific opcodes ASM_IFEQ ... ASM_JSR, ASM_IFNULL and
+                        // ASM_IFNONNULL to IFEQ ... JSR, IFNULL and IFNONNULL.
+                        opcode =
+                                opcode < Constants.ASM_IFNULL
+                                        ? opcode - Constants.ASM_OPCODE_DELTA
+                                        : opcode - Constants.ASM_IFNULL_OPCODE_DELTA;
+                        Label target = labels[currentBytecodeOffset + readUnsignedShort(currentOffset + 1)];
+                        if (opcode == Opcodes.GOTO || opcode == Opcodes.JSR) {
+                            // Replace GOTO with GOTO_W and JSR with JSR_W.
+                            methodVisitor.visitJumpInsn(opcode + Constants.WIDE_JUMP_OPCODE_DELTA, target);
+                        } else {
+                            // Compute the "opposite" of opcode. This can be done by flipping the least
+                            // significant bit for IFNULL and IFNONNULL, and similarly for IFEQ ... IF_ACMPEQ
+                            // (with a pre and post offset by 1).
+                            opcode = opcode < Opcodes.GOTO ? ((opcode + 1) ^ 1) - 1 : opcode ^ 1;
+                            Label endif = createLabel(currentBytecodeOffset + 3, labels);
+                            methodVisitor.visitJumpInsn(opcode, endif);
+                            methodVisitor.visitJumpInsn(Constants.GOTO_W, target);
+                            // endif designates the instruction just after GOTO_W, and is visited as part of the
+                            // next instruction. Since it is a jump target, we need to insert a frame here.
+                            insertFrame = true;
+                        }
+                        currentOffset += 3;
+                        break;
+                    }
+                case Constants.ASM_GOTO_W:
+                    // Replace ASM_GOTO_W with GOTO_W.
+                    methodVisitor.visitJumpInsn(
+                            Constants.GOTO_W, labels[currentBytecodeOffset + readInt(currentOffset + 1)]);
+                    // The instruction just after is a jump target (because ASM_GOTO_W is used in patterns
+                    // IFNOTxxx <L> ASM_GOTO_W <l> L:..., see MethodWriter), so we need to insert a frame
+                    // here.
+                    insertFrame = true;
+                    currentOffset += 5;
+                    break;
+                case Constants.WIDE:
+                    opcode = classBuffer[currentOffset + 1] & 0xFF;
+                    if (opcode == Opcodes.IINC) {
+                        methodVisitor.visitIincInsn(
+                                readUnsignedShort(currentOffset + 2), readShort(currentOffset + 4));
+                        currentOffset += 6;
+                    } else {
+                        methodVisitor.visitVarInsn(opcode, readUnsignedShort(currentOffset + 2));
+                        currentOffset += 4;
+                    }
+                    break;
+                case Opcodes.TABLESWITCH:
+                    {
+                        // Skip 0 to 3 padding bytes.
+                        currentOffset += 4 - (currentBytecodeOffset & 3);
+                        // Read the instruction.
+                        Label defaultLabel = labels[currentBytecodeOffset + readInt(currentOffset)];
+                        int low = readInt(currentOffset + 4);
+                        int high = readInt(currentOffset + 8);
+                        currentOffset += 12;
+                        Label[] table = new Label[high - low + 1];
+                        for (int i = 0; i < table.length; ++i) {
+                            table[i] = labels[currentBytecodeOffset + readInt(currentOffset)];
+                            currentOffset += 4;
+                        }
+                        methodVisitor.visitTableSwitchInsn(low, high, defaultLabel, table);
+                        break;
+                    }
+                case Opcodes.LOOKUPSWITCH:
+                    {
+                        // Skip 0 to 3 padding bytes.
+                        currentOffset += 4 - (currentBytecodeOffset & 3);
+                        // Read the instruction.
+                        Label defaultLabel = labels[currentBytecodeOffset + readInt(currentOffset)];
+                        int numPairs = readInt(currentOffset + 4);
+                        currentOffset += 8;
+                        int[] keys = new int[numPairs];
+                        Label[] values = new Label[numPairs];
+                        for (int i = 0; i < numPairs; ++i) {
+                            keys[i] = readInt(currentOffset);
+                            values[i] = labels[currentBytecodeOffset + readInt(currentOffset + 4)];
+                            currentOffset += 8;
+                        }
+                        methodVisitor.visitLookupSwitchInsn(defaultLabel, keys, values);
+                        break;
+                    }
+                case Opcodes.ILOAD:
+                case Opcodes.LLOAD:
+                case Opcodes.FLOAD:
+                case Opcodes.DLOAD:
+                case Opcodes.ALOAD:
+                case Opcodes.ISTORE:
+                case Opcodes.LSTORE:
+                case Opcodes.FSTORE:
+                case Opcodes.DSTORE:
+                case Opcodes.ASTORE:
+                case Opcodes.RET:
+                    methodVisitor.visitVarInsn(opcode, classBuffer[currentOffset + 1] & 0xFF);
+                    currentOffset += 2;
+                    break;
+                case Opcodes.BIPUSH:
+                case Opcodes.NEWARRAY:
+                    methodVisitor.visitIntInsn(opcode, classBuffer[currentOffset + 1]);
+                    currentOffset += 2;
+                    break;
+                case Opcodes.SIPUSH:
+                    methodVisitor.visitIntInsn(opcode, readShort(currentOffset + 1));
+                    currentOffset += 3;
+                    break;
+                case Opcodes.LDC:
+                    methodVisitor.visitLdcInsn(readConst(classBuffer[currentOffset + 1] & 0xFF, charBuffer));
+                    currentOffset += 2;
+                    break;
+                case Constants.LDC_W:
+                case Constants.LDC2_W:
+                    methodVisitor.visitLdcInsn(readConst(readUnsignedShort(currentOffset + 1), charBuffer));
+                    currentOffset += 3;
+                    break;
+                case Opcodes.GETSTATIC:
+                case Opcodes.PUTSTATIC:
+                case Opcodes.GETFIELD:
+                case Opcodes.PUTFIELD:
+                case Opcodes.INVOKEVIRTUAL:
+                case Opcodes.INVOKESPECIAL:
+                case Opcodes.INVOKESTATIC:
+                case Opcodes.INVOKEINTERFACE:
+                    {
+                        int cpInfoOffset = cpInfoOffsets[readUnsignedShort(currentOffset + 1)];
+                        int nameAndTypeCpInfoOffset = cpInfoOffsets[readUnsignedShort(cpInfoOffset + 2)];
+                        String owner = readClass(cpInfoOffset, charBuffer);
+                        String name = readUTF8(nameAndTypeCpInfoOffset, charBuffer);
+                        String descriptor = readUTF8(nameAndTypeCpInfoOffset + 2, charBuffer);
+                        if (opcode < Opcodes.INVOKEVIRTUAL) {
+                            methodVisitor.visitFieldInsn(opcode, owner, name, descriptor);
+                        } else {
+                            boolean isInterface =
+                                    classBuffer[cpInfoOffset - 1] == Symbol.CONSTANT_INTERFACE_METHODREF_TAG;
+                            methodVisitor.visitMethodInsn(opcode, owner, name, descriptor, isInterface);
+                        }
+                        if (opcode == Opcodes.INVOKEINTERFACE) {
+                            currentOffset += 5;
+                        } else {
+                            currentOffset += 3;
+                        }
+                        break;
+                    }
+                case Opcodes.INVOKEDYNAMIC:
+                    {
+                        int cpInfoOffset = cpInfoOffsets[readUnsignedShort(currentOffset + 1)];
+                        int nameAndTypeCpInfoOffset = cpInfoOffsets[readUnsignedShort(cpInfoOffset + 2)];
+                        String name = readUTF8(nameAndTypeCpInfoOffset, charBuffer);
+                        String descriptor = readUTF8(nameAndTypeCpInfoOffset + 2, charBuffer);
+                        int bootstrapMethodOffset = bootstrapMethodOffsets[readUnsignedShort(cpInfoOffset)];
+                        Handle handle =
+                                (Handle) readConst(readUnsignedShort(bootstrapMethodOffset), charBuffer);
+                        Object[] bootstrapMethodArguments =
+                                new Object[readUnsignedShort(bootstrapMethodOffset + 2)];
+                        bootstrapMethodOffset += 4;
+                        for (int i = 0; i < bootstrapMethodArguments.length; i++) {
+                            bootstrapMethodArguments[i] =
+                                    readConst(readUnsignedShort(bootstrapMethodOffset), charBuffer);
+                            bootstrapMethodOffset += 2;
+                        }
+                        methodVisitor.visitInvokeDynamicInsn(
+                                name, descriptor, handle, bootstrapMethodArguments);
+                        currentOffset += 5;
+                        break;
+                    }
+                case Opcodes.NEW:
+                case Opcodes.ANEWARRAY:
+                case Opcodes.CHECKCAST:
+                case Opcodes.INSTANCEOF:
+                    methodVisitor.visitTypeInsn(opcode, readClass(currentOffset + 1, charBuffer));
+                    currentOffset += 3;
+                    break;
+                case Opcodes.IINC:
+                    methodVisitor.visitIincInsn(
+                            classBuffer[currentOffset + 1] & 0xFF, classBuffer[currentOffset + 2]);
+                    currentOffset += 3;
+                    break;
+                case Opcodes.MULTIANEWARRAY:
+                    methodVisitor.visitMultiANewArrayInsn(
+                            readClass(currentOffset + 1, charBuffer), classBuffer[currentOffset + 3] & 0xFF);
+                    currentOffset += 4;
+                    break;
+                default:
+                    throw new AssertionError();
+            }
+
+            // Visit the runtime visible instruction annotations, if any.
+            while (visibleTypeAnnotationOffsets != null
+                    && currentVisibleTypeAnnotationIndex < visibleTypeAnnotationOffsets.length
+                    && currentVisibleTypeAnnotationBytecodeOffset <= currentBytecodeOffset) {
+                if (currentVisibleTypeAnnotationBytecodeOffset == currentBytecodeOffset) {
+                    // Parse the target_type, target_info and target_path fields.
+                    int currentAnnotationOffset =
+                            readTypeAnnotationTarget(
+                                    context, visibleTypeAnnotationOffsets[currentVisibleTypeAnnotationIndex]);
+                    // Parse the type_index field.
+                    String annotationDescriptor = readUTF8(currentAnnotationOffset, charBuffer);
+                    currentAnnotationOffset += 2;
+                    // Parse num_element_value_pairs and element_value_pairs and visit these values.
+                    readElementValues(
+                            methodVisitor.visitInsnAnnotation(
+                                    context.currentTypeAnnotationTarget,
+                                    context.currentTypeAnnotationTargetPath,
+                                    annotationDescriptor,
+                                    /* visible = */ true),
+                            currentAnnotationOffset,
+                            /* named = */ true,
+                            charBuffer);
+                }
+                currentVisibleTypeAnnotationBytecodeOffset =
+                        getTypeAnnotationBytecodeOffset(
+                                visibleTypeAnnotationOffsets, ++currentVisibleTypeAnnotationIndex);
+            }
+
+            // Visit the runtime invisible instruction annotations, if any.
+            while (invisibleTypeAnnotationOffsets != null
+                    && currentInvisibleTypeAnnotationIndex < invisibleTypeAnnotationOffsets.length
+                    && currentInvisibleTypeAnnotationBytecodeOffset <= currentBytecodeOffset) {
+                if (currentInvisibleTypeAnnotationBytecodeOffset == currentBytecodeOffset) {
+                    // Parse the target_type, target_info and target_path fields.
+                    int currentAnnotationOffset =
+                            readTypeAnnotationTarget(
+                                    context, invisibleTypeAnnotationOffsets[currentInvisibleTypeAnnotationIndex]);
+                    // Parse the type_index field.
+                    String annotationDescriptor = readUTF8(currentAnnotationOffset, charBuffer);
+                    currentAnnotationOffset += 2;
+                    // Parse num_element_value_pairs and element_value_pairs and visit these values.
+                    readElementValues(
+                            methodVisitor.visitInsnAnnotation(
+                                    context.currentTypeAnnotationTarget,
+                                    context.currentTypeAnnotationTargetPath,
+                                    annotationDescriptor,
+                                    /* visible = */ false),
+                            currentAnnotationOffset,
+                            /* named = */ true,
+                            charBuffer);
+                }
+                currentInvisibleTypeAnnotationBytecodeOffset =
+                        getTypeAnnotationBytecodeOffset(
+                                invisibleTypeAnnotationOffsets, ++currentInvisibleTypeAnnotationIndex);
+            }
+        }
+        if (labels[codeLength] != null) {
+            methodVisitor.visitLabel(labels[codeLength]);
+        }
+
+        // Visit LocalVariableTable and LocalVariableTypeTable attributes.
+        if (localVariableTableOffset != 0 && (context.parsingOptions & SKIP_DEBUG) == 0) {
+            // The (start_pc, index, signature_index) fields of each entry of the LocalVariableTypeTable.
+            int[] typeTable = null;
+            if (localVariableTypeTableOffset != 0) {
+                typeTable = new int[readUnsignedShort(localVariableTypeTableOffset) * 3];
+                currentOffset = localVariableTypeTableOffset + 2;
+                int typeTableIndex = typeTable.length;
+                while (typeTableIndex > 0) {
+                    // Store the offset of 'signature_index', and the value of 'index' and 'start_pc'.
+                    typeTable[--typeTableIndex] = currentOffset + 6;
+                    typeTable[--typeTableIndex] = readUnsignedShort(currentOffset + 8);
+                    typeTable[--typeTableIndex] = readUnsignedShort(currentOffset);
+                    currentOffset += 10;
+                }
+            }
+            int localVariableTableLength = readUnsignedShort(localVariableTableOffset);
+            currentOffset = localVariableTableOffset + 2;
+            while (localVariableTableLength-- > 0) {
+                int startPc = readUnsignedShort(currentOffset);
+                int length = readUnsignedShort(currentOffset + 2);
+                String name = readUTF8(currentOffset + 4, charBuffer);
+                String descriptor = readUTF8(currentOffset + 6, charBuffer);
+                int index = readUnsignedShort(currentOffset + 8);
+                currentOffset += 10;
+                String signature = null;
+                if (typeTable != null) {
+                    for (int i = 0; i < typeTable.length; i += 3) {
+                        if (typeTable[i] == startPc && typeTable[i + 1] == index) {
+                            signature = readUTF8(typeTable[i + 2], charBuffer);
+                            break;
+                        }
+                    }
+                }
+                methodVisitor.visitLocalVariable(
+                        name, descriptor, signature, labels[startPc], labels[startPc + length], index);
+            }
+        }
+
+        // Visit the local variable type annotations of the RuntimeVisibleTypeAnnotations attribute.
+        if (visibleTypeAnnotationOffsets != null) {
+            for (int typeAnnotationOffset : visibleTypeAnnotationOffsets) {
+                int targetType = readByte(typeAnnotationOffset);
+                if (targetType == TypeReference.LOCAL_VARIABLE
+                        || targetType == TypeReference.RESOURCE_VARIABLE) {
+                    // Parse the target_type, target_info and target_path fields.
+                    currentOffset = readTypeAnnotationTarget(context, typeAnnotationOffset);
+                    // Parse the type_index field.
+                    String annotationDescriptor = readUTF8(currentOffset, charBuffer);
+                    currentOffset += 2;
+                    // Parse num_element_value_pairs and element_value_pairs and visit these values.
+                    readElementValues(
+                            methodVisitor.visitLocalVariableAnnotation(
+                                    context.currentTypeAnnotationTarget,
+                                    context.currentTypeAnnotationTargetPath,
+                                    context.currentLocalVariableAnnotationRangeStarts,
+                                    context.currentLocalVariableAnnotationRangeEnds,
+                                    context.currentLocalVariableAnnotationRangeIndices,
+                                    annotationDescriptor,
+                                    /* visible = */ true),
+                            currentOffset,
+                            /* named = */ true,
+                            charBuffer);
+                }
+            }
+        }
+
+        // Visit the local variable type annotations of the RuntimeInvisibleTypeAnnotations attribute.
+        if (invisibleTypeAnnotationOffsets != null) {
+            for (int typeAnnotationOffset : invisibleTypeAnnotationOffsets) {
+                int targetType = readByte(typeAnnotationOffset);
+                if (targetType == TypeReference.LOCAL_VARIABLE
+                        || targetType == TypeReference.RESOURCE_VARIABLE) {
+                    // Parse the target_type, target_info and target_path fields.
+                    currentOffset = readTypeAnnotationTarget(context, typeAnnotationOffset);
+                    // Parse the type_index field.
+                    String annotationDescriptor = readUTF8(currentOffset, charBuffer);
+                    currentOffset += 2;
+                    // Parse num_element_value_pairs and element_value_pairs and visit these values.
+                    readElementValues(
+                            methodVisitor.visitLocalVariableAnnotation(
+                                    context.currentTypeAnnotationTarget,
+                                    context.currentTypeAnnotationTargetPath,
+                                    context.currentLocalVariableAnnotationRangeStarts,
+                                    context.currentLocalVariableAnnotationRangeEnds,
+                                    context.currentLocalVariableAnnotationRangeIndices,
+                                    annotationDescriptor,
+                                    /* visible = */ false),
+                            currentOffset,
+                            /* named = */ true,
+                            charBuffer);
+                }
+            }
+        }
+
+        // Visit the non standard attributes.
+        while (attributes != null) {
+            // Copy and reset the nextAttribute field so that it can also be used in MethodWriter.
+            Attribute nextAttribute = attributes.nextAttribute;
+            attributes.nextAttribute = null;
+            methodVisitor.visitAttribute(attributes);
+            attributes = nextAttribute;
+        }
+
+        // Visit the max stack and max locals values.
+        methodVisitor.visitMaxs(maxStack, maxLocals);
+    }
+
+    /**
+      * Handles the bytecode offset of the next instruction to be visited in {@link
+      * #accept(ClassVisitor,int)}. This method is called just before the instruction and before its
+      * associated label and stack map frame, if any. The default implementation of this method does
+      * nothing. Subclasses can override this method to store the argument in a mutable field, for
+      * instance, so that {@link MethodVisitor} instances can get the bytecode offset of each visited
+      * instruction (if so, the usual concurrency issues related to mutable data should be addressed).
+      *
+      * @param bytecodeOffset the bytecode offset of the next instruction to be visited.
+      */
+    protected void readBytecodeInstructionOffset(final int bytecodeOffset) {
+        // Do nothing by default.
+    }
+
+    /**
+      * Returns the label corresponding to the given bytecode offset. The default implementation of
+      * this method creates a label for the given offset if it has not been already created.
+      *
+      * @param bytecodeOffset a bytecode offset in a method.
+      * @param labels the already created labels, indexed by their offset. If a label already exists
+      *     for bytecodeOffset this method must not create a new one. Otherwise it must store the new
+      *     label in this array.
+      * @return a non null Label, which must be equal to labels[bytecodeOffset].
+      */
+    protected Label readLabel(final int bytecodeOffset, final Label[] labels) {
+        if (labels[bytecodeOffset] == null) {
+            labels[bytecodeOffset] = new Label();
+        }
+        return labels[bytecodeOffset];
+    }
+
+    /**
+      * Creates a label without the {@link Label#FLAG_DEBUG_ONLY} flag set, for the given bytecode
+      * offset. The label is created with a call to {@link #readLabel} and its {@link
+      * Label#FLAG_DEBUG_ONLY} flag is cleared.
+      *
+      * @param bytecodeOffset a bytecode offset in a method.
+      * @param labels the already created labels, indexed by their offset.
+      * @return a Label without the {@link Label#FLAG_DEBUG_ONLY} flag set.
+      */
+    private Label createLabel(final int bytecodeOffset, final Label[] labels) {
+        Label label = readLabel(bytecodeOffset, labels);
+        label.flags &= ~Label.FLAG_DEBUG_ONLY;
+        return label;
+    }
+
+    /**
+      * Creates a label with the {@link Label#FLAG_DEBUG_ONLY} flag set, if there is no already
+      * existing label for the given bytecode offset (otherwise does nothing). The label is created
+      * with a call to {@link #readLabel}.
+      *
+      * @param bytecodeOffset a bytecode offset in a method.
+      * @param labels the already created labels, indexed by their offset.
+      */
+    private void createDebugLabel(final int bytecodeOffset, final Label[] labels) {
+        if (labels[bytecodeOffset] == null) {
+            readLabel(bytecodeOffset, labels).flags |= Label.FLAG_DEBUG_ONLY;
+        }
+    }
+
+    // ----------------------------------------------------------------------------------------------
+    // Methods to parse annotations, type annotations and parameter annotations
+    // ----------------------------------------------------------------------------------------------
+
+    /**
+      * Parses a Runtime[In]VisibleTypeAnnotations attribute to find the offset of each type_annotation
+      * entry it contains, to find the corresponding labels, and to visit the try catch block
+      * annotations.
+      *
+      * @param methodVisitor the method visitor to be used to visit the try catch block annotations.
+      * @param context information about the class being parsed.
+      * @param runtimeTypeAnnotationsOffset the start offset of a Runtime[In]VisibleTypeAnnotations
+      *     attribute, excluding the attribute_info's attribute_name_index and attribute_length fields.
+      * @param visible true if the attribute to parse is a RuntimeVisibleTypeAnnotations attribute,
+      *     false it is a RuntimeInvisibleTypeAnnotations attribute.
+      * @return the start offset of each entry of the Runtime[In]VisibleTypeAnnotations_attribute's
+      *     'annotations' array field.
+      */
+    private int[] readTypeAnnotations(
+            final MethodVisitor methodVisitor,
+            final Context context,
+            final int runtimeTypeAnnotationsOffset,
+            final boolean visible) {
+        char[] charBuffer = context.charBuffer;
+        int currentOffset = runtimeTypeAnnotationsOffset;
+        // Read the num_annotations field and create an array to store the type_annotation offsets.
+        int[] typeAnnotationsOffsets = new int[readUnsignedShort(currentOffset)];
+        currentOffset += 2;
+        // Parse the 'annotations' array field.
+        for (int i = 0; i < typeAnnotationsOffsets.length; ++i) {
+            typeAnnotationsOffsets[i] = currentOffset;
+            // Parse the type_annotation's target_type and the target_info fields. The size of the
+            // target_info field depends on the value of target_type.
+            int targetType = readInt(currentOffset);
+            switch (targetType >>> 24) {
+                case TypeReference.LOCAL_VARIABLE:
+                case TypeReference.RESOURCE_VARIABLE:
+                    // A localvar_target has a variable size, which depends on the value of their table_length
+                    // field. It also references bytecode offsets, for which we need labels.
+                    int tableLength = readUnsignedShort(currentOffset + 1);
+                    currentOffset += 3;
+                    while (tableLength-- > 0) {
+                        int startPc = readUnsignedShort(currentOffset);
+                        int length = readUnsignedShort(currentOffset + 2);
+                        // Skip the index field (2 bytes).
+                        currentOffset += 6;
+                        createLabel(startPc, context.currentMethodLabels);
+                        createLabel(startPc + length, context.currentMethodLabels);
+                    }
+                    break;
+                case TypeReference.CAST:
+                case TypeReference.CONSTRUCTOR_INVOCATION_TYPE_ARGUMENT:
+                case TypeReference.METHOD_INVOCATION_TYPE_ARGUMENT:
+                case TypeReference.CONSTRUCTOR_REFERENCE_TYPE_ARGUMENT:
+                case TypeReference.METHOD_REFERENCE_TYPE_ARGUMENT:
+                    currentOffset += 4;
+                    break;
+                case TypeReference.CLASS_EXTENDS:
+                case TypeReference.CLASS_TYPE_PARAMETER_BOUND:
+                case TypeReference.METHOD_TYPE_PARAMETER_BOUND:
+                case TypeReference.THROWS:
+                case TypeReference.EXCEPTION_PARAMETER:
+                case TypeReference.INSTANCEOF:
+                case TypeReference.NEW:
+                case TypeReference.CONSTRUCTOR_REFERENCE:
+                case TypeReference.METHOD_REFERENCE:
+                    currentOffset += 3;
+                    break;
+                case TypeReference.CLASS_TYPE_PARAMETER:
+                case TypeReference.METHOD_TYPE_PARAMETER:
+                case TypeReference.METHOD_FORMAL_PARAMETER:
+                case TypeReference.FIELD:
+                case TypeReference.METHOD_RETURN:
+                case TypeReference.METHOD_RECEIVER:
+                default:
+                    // TypeReference type which can't be used in Code attribute, or which is unknown.
+                    throw new IllegalArgumentException();
+            }
+            // Parse the rest of the type_annotation structure, starting with the target_path structure
+            // (whose size depends on its path_length field).
+            int pathLength = readByte(currentOffset);
+            if ((targetType >>> 24) == TypeReference.EXCEPTION_PARAMETER) {
+                // Parse the target_path structure and create a corresponding TypePath.
+                TypePath path = pathLength == 0 ? null : new TypePath(classFileBuffer, currentOffset);
+                currentOffset += 1 + 2 * pathLength;
+                // Parse the type_index field.
+                String annotationDescriptor = readUTF8(currentOffset, charBuffer);
+                currentOffset += 2;
+                // Parse num_element_value_pairs and element_value_pairs and visit these values.
+                currentOffset =
+                        readElementValues(
+                                methodVisitor.visitTryCatchAnnotation(
+                                        targetType & 0xFFFFFF00, path, annotationDescriptor, visible),
+                                currentOffset,
+                                /* named = */ true,
+                                charBuffer);
+            } else {
+                // We don't want to visit the other target_type annotations, so we just skip them (which
+                // requires some parsing because the element_value_pairs array has a variable size). First,
+                // skip the target_path structure:
+                currentOffset += 3 + 2 * pathLength;
+                // Then skip the num_element_value_pairs and element_value_pairs fields (by reading them
+                // with a null AnnotationVisitor).
+                currentOffset =
+                        readElementValues(
+                                /* annotationVisitor = */ null, currentOffset, /* named = */ true, charBuffer);
+            }
+        }
+        return typeAnnotationsOffsets;
+    }
+
+    /**
+      * Returns the bytecode offset corresponding to the specified JVMS 'type_annotation' structure, or
+      * -1 if there is no such type_annotation of if it does not have a bytecode offset.
+      *
+      * @param typeAnnotationOffsets the offset of each 'type_annotation' entry in a
+      *     Runtime[In]VisibleTypeAnnotations attribute, or {@literal null}.
+      * @param typeAnnotationIndex the index a 'type_annotation' entry in typeAnnotationOffsets.
+      * @return bytecode offset corresponding to the specified JVMS 'type_annotation' structure, or -1
+      *     if there is no such type_annotation of if it does not have a bytecode offset.
+      */
+    private int getTypeAnnotationBytecodeOffset(
+            final int[] typeAnnotationOffsets, final int typeAnnotationIndex) {
+        if (typeAnnotationOffsets == null
+                || typeAnnotationIndex >= typeAnnotationOffsets.length
+                || readByte(typeAnnotationOffsets[typeAnnotationIndex]) < TypeReference.INSTANCEOF) {
+            return -1;
+        }
+        return readUnsignedShort(typeAnnotationOffsets[typeAnnotationIndex] + 1);
+    }
+
+    /**
+      * Parses the header of a JVMS type_annotation structure to extract its target_type, target_info
+      * and target_path (the result is stored in the given context), and returns the start offset of
+      * the rest of the type_annotation structure.
+      *
+      * @param context information about the class being parsed. This is where the extracted
+      *     target_type and target_path must be stored.
+      * @param typeAnnotationOffset the start offset of a type_annotation structure.
+      * @return the start offset of the rest of the type_annotation structure.
+      */
+    private int readTypeAnnotationTarget(final Context context, final int typeAnnotationOffset) {
+        int currentOffset = typeAnnotationOffset;
+        // Parse and store the target_type structure.
+        int targetType = readInt(typeAnnotationOffset);
+        switch (targetType >>> 24) {
+            case TypeReference.CLASS_TYPE_PARAMETER:
+            case TypeReference.METHOD_TYPE_PARAMETER:
+            case TypeReference.METHOD_FORMAL_PARAMETER:
+                targetType &= 0xFFFF0000;
+                currentOffset += 2;
+                break;
+            case TypeReference.FIELD:
+            case TypeReference.METHOD_RETURN:
+            case TypeReference.METHOD_RECEIVER:
+                targetType &= 0xFF000000;
+                currentOffset += 1;
+                break;
+            case TypeReference.LOCAL_VARIABLE:
+            case TypeReference.RESOURCE_VARIABLE:
+                targetType &= 0xFF000000;
+                int tableLength = readUnsignedShort(currentOffset + 1);
+                currentOffset += 3;
+                context.currentLocalVariableAnnotationRangeStarts = new Label[tableLength];
+                context.currentLocalVariableAnnotationRangeEnds = new Label[tableLength];
+                context.currentLocalVariableAnnotationRangeIndices = new int[tableLength];
+                for (int i = 0; i < tableLength; ++i) {
+                    int startPc = readUnsignedShort(currentOffset);
+                    int length = readUnsignedShort(currentOffset + 2);
+                    int index = readUnsignedShort(currentOffset + 4);
+                    currentOffset += 6;
+                    context.currentLocalVariableAnnotationRangeStarts[i] =
+                            createLabel(startPc, context.currentMethodLabels);
+                    context.currentLocalVariableAnnotationRangeEnds[i] =
+                            createLabel(startPc + length, context.currentMethodLabels);
+                    context.currentLocalVariableAnnotationRangeIndices[i] = index;
+                }
+                break;
+            case TypeReference.CAST:
+            case TypeReference.CONSTRUCTOR_INVOCATION_TYPE_ARGUMENT:
+            case TypeReference.METHOD_INVOCATION_TYPE_ARGUMENT:
+            case TypeReference.CONSTRUCTOR_REFERENCE_TYPE_ARGUMENT:
+            case TypeReference.METHOD_REFERENCE_TYPE_ARGUMENT:
+                targetType &= 0xFF0000FF;
+                currentOffset += 4;
+                break;
+            case TypeReference.CLASS_EXTENDS:
+            case TypeReference.CLASS_TYPE_PARAMETER_BOUND:
+            case TypeReference.METHOD_TYPE_PARAMETER_BOUND:
+            case TypeReference.THROWS:
+            case TypeReference.EXCEPTION_PARAMETER:
+                targetType &= 0xFFFFFF00;
+                currentOffset += 3;
+                break;
+            case TypeReference.INSTANCEOF:
+            case TypeReference.NEW:
+            case TypeReference.CONSTRUCTOR_REFERENCE:
+            case TypeReference.METHOD_REFERENCE:
+                targetType &= 0xFF000000;
+                currentOffset += 3;
+                break;
+            default:
+                throw new IllegalArgumentException();
+        }
+        context.currentTypeAnnotationTarget = targetType;
+        // Parse and store the target_path structure.
+        int pathLength = readByte(currentOffset);
+        context.currentTypeAnnotationTargetPath =
+                pathLength == 0 ? null : new TypePath(classFileBuffer, currentOffset);
+        // Return the start offset of the rest of the type_annotation structure.
+        return currentOffset + 1 + 2 * pathLength;
+    }
+
+    /**
+      * Reads a Runtime[In]VisibleParameterAnnotations attribute and makes the given visitor visit it.
+      *
+      * @param methodVisitor the visitor that must visit the parameter annotations.
+      * @param context information about the class being parsed.
+      * @param runtimeParameterAnnotationsOffset the start offset of a
+      *     Runtime[In]VisibleParameterAnnotations attribute, excluding the attribute_info's
+      *     attribute_name_index and attribute_length fields.
+      * @param visible true if the attribute to parse is a RuntimeVisibleParameterAnnotations
+      *     attribute, false it is a RuntimeInvisibleParameterAnnotations attribute.
+      */
+    private void readParameterAnnotations(
+            final MethodVisitor methodVisitor,
+            final Context context,
+            final int runtimeParameterAnnotationsOffset,
+            final boolean visible) {
+        int currentOffset = runtimeParameterAnnotationsOffset;
+        int numParameters = classFileBuffer[currentOffset++] & 0xFF;
+        methodVisitor.visitAnnotableParameterCount(numParameters, visible);
+        char[] charBuffer = context.charBuffer;
+        for (int i = 0; i < numParameters; ++i) {
+            int numAnnotations = readUnsignedShort(currentOffset);
+            currentOffset += 2;
+            while (numAnnotations-- > 0) {
+                // Parse the type_index field.
+                String annotationDescriptor = readUTF8(currentOffset, charBuffer);
+                currentOffset += 2;
+                // Parse num_element_value_pairs and element_value_pairs and visit these values.
+                currentOffset =
+                        readElementValues(
+                                methodVisitor.visitParameterAnnotation(i, annotationDescriptor, visible),
+                                currentOffset,
+                                /* named = */ true,
+                                charBuffer);
+            }
+        }
+    }
+
+    /**
+      * Reads the element values of a JVMS 'annotation' structure and makes the given visitor visit
+      * them. This method can also be used to read the values of the JVMS 'array_value' field of an
+      * annotation's 'element_value'.
+      *
+      * @param annotationVisitor the visitor that must visit the values.
+      * @param annotationOffset the start offset of an 'annotation' structure (excluding its type_index
+      *     field) or of an 'array_value' structure.
+      * @param named if the annotation values are named or not. This should be true to parse the values
+      *     of a JVMS 'annotation' structure, and false to parse the JVMS 'array_value' of an
+      *     annotation's element_value.
+      * @param charBuffer the buffer used to read strings in the constant pool.
+      * @return the end offset of the JVMS 'annotation' or 'array_value' structure.
+      */
+    private int readElementValues(
+            final AnnotationVisitor annotationVisitor,
+            final int annotationOffset,
+            final boolean named,
+            final char[] charBuffer) {
+        int currentOffset = annotationOffset;
+        // Read the num_element_value_pairs field (or num_values field for an array_value).
+        int numElementValuePairs = readUnsignedShort(currentOffset);
+        currentOffset += 2;
+        if (named) {
+            // Parse the element_value_pairs array.
+            while (numElementValuePairs-- > 0) {
+                String elementName = readUTF8(currentOffset, charBuffer);
+                currentOffset =
+                        readElementValue(annotationVisitor, currentOffset + 2, elementName, charBuffer);
+            }
+        } else {
+            // Parse the array_value array.
+            while (numElementValuePairs-- > 0) {
+                currentOffset =
+                        readElementValue(annotationVisitor, currentOffset, /* elementName= */ null, charBuffer);
+            }
+        }
+        if (annotationVisitor != null) {
+            annotationVisitor.visitEnd();
+        }
+        return currentOffset;
+    }
+
+    /**
+      * Reads a JVMS 'element_value' structure and makes the given visitor visit it.
+      *
+      * @param annotationVisitor the visitor that must visit the element_value structure.
+      * @param elementValueOffset the start offset in {@link #classFileBuffer} of the element_value
+      *     structure to be read.
+      * @param elementName the name of the element_value structure to be read, or {@literal null}.
+      * @param charBuffer the buffer used to read strings in the constant pool.
+      * @return the end offset of the JVMS 'element_value' structure.
+      */
+    private int readElementValue(
+            final AnnotationVisitor annotationVisitor,
+            final int elementValueOffset,
+            final String elementName,
+            final char[] charBuffer) {
+        int currentOffset = elementValueOffset;
+        if (annotationVisitor == null) {
+            switch (classFileBuffer[currentOffset] & 0xFF) {
+                case 'e': // enum_const_value
+                    return currentOffset + 5;
+                case '@': // annotation_value
+                    return readElementValues(null, currentOffset + 3, /* named = */ true, charBuffer);
+                case '[': // array_value
+                    return readElementValues(null, currentOffset + 1, /* named = */ false, charBuffer);
+                default:
+                    return currentOffset + 3;
+            }
+        }
+        switch (classFileBuffer[currentOffset++] & 0xFF) {
+            case 'B': // const_value_index, CONSTANT_Integer
+                annotationVisitor.visit(
+                        elementName, (byte) readInt(cpInfoOffsets[readUnsignedShort(currentOffset)]));
+                currentOffset += 2;
+                break;
+            case 'C': // const_value_index, CONSTANT_Integer
+                annotationVisitor.visit(
+                        elementName, (char) readInt(cpInfoOffsets[readUnsignedShort(currentOffset)]));
+                currentOffset += 2;
+                break;
+            case 'D': // const_value_index, CONSTANT_Double
+            case 'F': // const_value_index, CONSTANT_Float
+            case 'I': // const_value_index, CONSTANT_Integer
+            case 'J': // const_value_index, CONSTANT_Long
+                annotationVisitor.visit(
+                        elementName, readConst(readUnsignedShort(currentOffset), charBuffer));
+                currentOffset += 2;
+                break;
+            case 'S': // const_value_index, CONSTANT_Integer
+                annotationVisitor.visit(
+                        elementName, (short) readInt(cpInfoOffsets[readUnsignedShort(currentOffset)]));
+                currentOffset += 2;
+                break;
+
+            case 'Z': // const_value_index, CONSTANT_Integer
+                annotationVisitor.visit(
+                        elementName,
+                        readInt(cpInfoOffsets[readUnsignedShort(currentOffset)]) == 0
+                                ? Boolean.FALSE
+                                : Boolean.TRUE);
+                currentOffset += 2;
+                break;
+            case 's': // const_value_index, CONSTANT_Utf8
+                annotationVisitor.visit(elementName, readUTF8(currentOffset, charBuffer));
+                currentOffset += 2;
+                break;
+            case 'e': // enum_const_value
+                annotationVisitor.visitEnum(
+                        elementName,
+                        readUTF8(currentOffset, charBuffer),
+                        readUTF8(currentOffset + 2, charBuffer));
+                currentOffset += 4;
+                break;
+            case 'c': // class_info
+                annotationVisitor.visit(elementName, Type.getType(readUTF8(currentOffset, charBuffer)));
+                currentOffset += 2;
+                break;
+            case '@': // annotation_value
+                currentOffset =
+                        readElementValues(
+                                annotationVisitor.visitAnnotation(elementName, readUTF8(currentOffset, charBuffer)),
+                                currentOffset + 2,
+                                true,
+                                charBuffer);
+                break;
+            case '[': // array_value
+                int numValues = readUnsignedShort(currentOffset);
+                currentOffset += 2;
+                if (numValues == 0) {
+                    return readElementValues(
+                            annotationVisitor.visitArray(elementName),
+                            currentOffset - 2,
+                            /* named = */ false,
+                            charBuffer);
+                }
+                switch (classFileBuffer[currentOffset] & 0xFF) {
+                    case 'B':
+                        byte[] byteValues = new byte[numValues];
+                        for (int i = 0; i < numValues; i++) {
+                            byteValues[i] = (byte) readInt(cpInfoOffsets[readUnsignedShort(currentOffset + 1)]);
+                            currentOffset += 3;
+                        }
+                        annotationVisitor.visit(elementName, byteValues);
+                        break;
+                    case 'Z':
+                        boolean[] booleanValues = new boolean[numValues];
+                        for (int i = 0; i < numValues; i++) {
+                            booleanValues[i] = readInt(cpInfoOffsets[readUnsignedShort(currentOffset + 1)]) != 0;
+                            currentOffset += 3;
+                        }
+                        annotationVisitor.visit(elementName, booleanValues);
+                        break;
+                    case 'S':
+                        short[] shortValues = new short[numValues];
+                        for (int i = 0; i < numValues; i++) {
+                            shortValues[i] = (short) readInt(cpInfoOffsets[readUnsignedShort(currentOffset + 1)]);
+                            currentOffset += 3;
+                        }
+                        annotationVisitor.visit(elementName, shortValues);
+                        break;
+                    case 'C':
+                        char[] charValues = new char[numValues];
+                        for (int i = 0; i < numValues; i++) {
+                            charValues[i] = (char) readInt(cpInfoOffsets[readUnsignedShort(currentOffset + 1)]);
+                            currentOffset += 3;
+                        }
+                        annotationVisitor.visit(elementName, charValues);
+                        break;
+                    case 'I':
+                        int[] intValues = new int[numValues];
+                        for (int i = 0; i < numValues; i++) {
+                            intValues[i] = readInt(cpInfoOffsets[readUnsignedShort(currentOffset + 1)]);
+                            currentOffset += 3;
+                        }
+                        annotationVisitor.visit(elementName, intValues);
+                        break;
+                    case 'J':
+                        long[] longValues = new long[numValues];
+                        for (int i = 0; i < numValues; i++) {
+                            longValues[i] = readLong(cpInfoOffsets[readUnsignedShort(currentOffset + 1)]);
+                            currentOffset += 3;
+                        }
+                        annotationVisitor.visit(elementName, longValues);
+                        break;
+                    case 'F':
+                        float[] floatValues = new float[numValues];
+                        for (int i = 0; i < numValues; i++) {
+                            floatValues[i] =
+                                    Float.intBitsToFloat(
+                                            readInt(cpInfoOffsets[readUnsignedShort(currentOffset + 1)]));
+                            currentOffset += 3;
+                        }
+                        annotationVisitor.visit(elementName, floatValues);
+                        break;
+                    case 'D':
+                        double[] doubleValues = new double[numValues];
+                        for (int i = 0; i < numValues; i++) {
+                            doubleValues[i] =
+                                    Double.longBitsToDouble(
+                                            readLong(cpInfoOffsets[readUnsignedShort(currentOffset + 1)]));
+                            currentOffset += 3;
+                        }
+                        annotationVisitor.visit(elementName, doubleValues);
+                        break;
+                    default:
+                        currentOffset =
+                                readElementValues(
+                                        annotationVisitor.visitArray(elementName),
+                                        currentOffset - 2,
+                                        /* named = */ false,
+                                        charBuffer);
+                        break;
+                }
+                break;
+            default:
+                throw new IllegalArgumentException();
+        }
+        return currentOffset;
+    }
+
+    // ----------------------------------------------------------------------------------------------
+    // Methods to parse stack map frames
+    // ----------------------------------------------------------------------------------------------
+
+    /**
+      * Computes the implicit frame of the method currently being parsed (as defined in the given
+      * {@link Context}) and stores it in the given context.
+      *
+      * @param context information about the class being parsed.
+      */
+    private void computeImplicitFrame(final Context context) {
+        String methodDescriptor = context.currentMethodDescriptor;
+        Object[] locals = context.currentFrameLocalTypes;
+        int numLocal = 0;
+        if ((context.currentMethodAccessFlags & Opcodes.ACC_STATIC) == 0) {
+            if ("<init>".equals(context.currentMethodName)) {
+                locals[numLocal++] = Opcodes.UNINITIALIZED_THIS;
+            } else {
+                locals[numLocal++] = readClass(header + 2, context.charBuffer);
+            }
+        }
+        // Parse the method descriptor, one argument type descriptor at each iteration. Start by
+        // skipping the first method descriptor character, which is always '('.
+        int currentMethodDescritorOffset = 1;
+        while (true) {
+            int currentArgumentDescriptorStartOffset = currentMethodDescritorOffset;
+            switch (methodDescriptor.charAt(currentMethodDescritorOffset++)) {
+                case 'Z':
+                case 'C':
+                case 'B':
+                case 'S':
+                case 'I':
+                    locals[numLocal++] = Opcodes.INTEGER;
+                    break;
+                case 'F':
+                    locals[numLocal++] = Opcodes.FLOAT;
+                    break;
+                case 'J':
+                    locals[numLocal++] = Opcodes.LONG;
+                    break;
+                case 'D':
+                    locals[numLocal++] = Opcodes.DOUBLE;
+                    break;
+                case '[':
+                    while (methodDescriptor.charAt(currentMethodDescritorOffset) == '[') {
+                        ++currentMethodDescritorOffset;
+                    }
+                    if (methodDescriptor.charAt(currentMethodDescritorOffset) == 'L') {
+                        ++currentMethodDescritorOffset;
+                        while (methodDescriptor.charAt(currentMethodDescritorOffset) != ';') {
+                            ++currentMethodDescritorOffset;
+                        }
+                    }
+                    locals[numLocal++] =
+                            methodDescriptor.substring(
+                                    currentArgumentDescriptorStartOffset, ++currentMethodDescritorOffset);
+                    break;
+                case 'L':
+                    while (methodDescriptor.charAt(currentMethodDescritorOffset) != ';') {
+                        ++currentMethodDescritorOffset;
+                    }
+                    locals[numLocal++] =
+                            methodDescriptor.substring(
+                                    currentArgumentDescriptorStartOffset + 1, currentMethodDescritorOffset++);
+                    break;
+                default:
+                    context.currentFrameLocalCount = numLocal;
+                    return;
+            }
+        }
+    }
+
+    /**
+      * Reads a JVMS 'stack_map_frame' structure and stores the result in the given {@link Context}
+      * object. This method can also be used to read a full_frame structure, excluding its frame_type
+      * field (this is used to parse the legacy StackMap attributes).
+      *
+      * @param stackMapFrameOffset the start offset in {@link #classFileBuffer} of the
+      *     stack_map_frame_value structure to be read, or the start offset of a full_frame structure
+      *     (excluding its frame_type field).
+      * @param compressed true to read a 'stack_map_frame' structure, false to read a 'full_frame'
+      *     structure without its frame_type field.
+      * @param expand if the stack map frame must be expanded. See {@link #EXPAND_FRAMES}.
+      * @param context where the parsed stack map frame must be stored.
+      * @return the end offset of the JVMS 'stack_map_frame' or 'full_frame' structure.
+      */
+    private int readStackMapFrame(
+            final int stackMapFrameOffset,
+            final boolean compressed,
+            final boolean expand,
+            final Context context) {
+        int currentOffset = stackMapFrameOffset;
+        final char[] charBuffer = context.charBuffer;
+        final Label[] labels = context.currentMethodLabels;
+        int frameType;
+        if (compressed) {
+            // Read the frame_type field.
+            frameType = classFileBuffer[currentOffset++] & 0xFF;
+        } else {
+            frameType = Frame.FULL_FRAME;
+            context.currentFrameOffset = -1;
+        }
+        int offsetDelta;
+        context.currentFrameLocalCountDelta = 0;
+        if (frameType < Frame.SAME_LOCALS_1_STACK_ITEM_FRAME) {
+            offsetDelta = frameType;
+            context.currentFrameType = Opcodes.F_SAME;
+            context.currentFrameStackCount = 0;
+        } else if (frameType < Frame.RESERVED) {
+            offsetDelta = frameType - Frame.SAME_LOCALS_1_STACK_ITEM_FRAME;
+            currentOffset =
+                    readVerificationTypeInfo(
+                            currentOffset, context.currentFrameStackTypes, 0, charBuffer, labels);
+            context.currentFrameType = Opcodes.F_SAME1;
+            context.currentFrameStackCount = 1;
+        } else if (frameType >= Frame.SAME_LOCALS_1_STACK_ITEM_FRAME_EXTENDED) {
+            offsetDelta = readUnsignedShort(currentOffset);
+            currentOffset += 2;
+            if (frameType == Frame.SAME_LOCALS_1_STACK_ITEM_FRAME_EXTENDED) {
+                currentOffset =
+                        readVerificationTypeInfo(
+                                currentOffset, context.currentFrameStackTypes, 0, charBuffer, labels);
+                context.currentFrameType = Opcodes.F_SAME1;
+                context.currentFrameStackCount = 1;
+            } else if (frameType >= Frame.CHOP_FRAME && frameType < Frame.SAME_FRAME_EXTENDED) {
+                context.currentFrameType = Opcodes.F_CHOP;
+                context.currentFrameLocalCountDelta = Frame.SAME_FRAME_EXTENDED - frameType;
+                context.currentFrameLocalCount -= context.currentFrameLocalCountDelta;
+                context.currentFrameStackCount = 0;
+            } else if (frameType == Frame.SAME_FRAME_EXTENDED) {
+                context.currentFrameType = Opcodes.F_SAME;
+                context.currentFrameStackCount = 0;
+            } else if (frameType < Frame.FULL_FRAME) {
+                int local = expand ? context.currentFrameLocalCount : 0;
+                for (int k = frameType - Frame.SAME_FRAME_EXTENDED; k > 0; k--) {
+                    currentOffset =
+                            readVerificationTypeInfo(
+                                    currentOffset, context.currentFrameLocalTypes, local++, charBuffer, labels);
+                }
+                context.currentFrameType = Opcodes.F_APPEND;
+                context.currentFrameLocalCountDelta = frameType - Frame.SAME_FRAME_EXTENDED;
+                context.currentFrameLocalCount += context.currentFrameLocalCountDelta;
+                context.currentFrameStackCount = 0;
+            } else {
+                final int numberOfLocals = readUnsignedShort(currentOffset);
+                currentOffset += 2;
+                context.currentFrameType = Opcodes.F_FULL;
+                context.currentFrameLocalCountDelta = numberOfLocals;
+                context.currentFrameLocalCount = numberOfLocals;
+                for (int local = 0; local < numberOfLocals; ++local) {
+                    currentOffset =
+                            readVerificationTypeInfo(
+                                    currentOffset, context.currentFrameLocalTypes, local, charBuffer, labels);
+                }
+                final int numberOfStackItems = readUnsignedShort(currentOffset);
+                currentOffset += 2;
+                context.currentFrameStackCount = numberOfStackItems;
+                for (int stack = 0; stack < numberOfStackItems; ++stack) {
+                    currentOffset =
+                            readVerificationTypeInfo(
+                                    currentOffset, context.currentFrameStackTypes, stack, charBuffer, labels);
+                }
+            }
+        } else {
+            throw new IllegalArgumentException();
+        }
+        context.currentFrameOffset += offsetDelta + 1;
+        createLabel(context.currentFrameOffset, labels);
+        return currentOffset;
+    }
+
+    /**
+      * Reads a JVMS 'verification_type_info' structure and stores it at the given index in the given
+      * array.
+      *
+      * @param verificationTypeInfoOffset the start offset of the 'verification_type_info' structure to
+      *     read.
+      * @param frame the array where the parsed type must be stored.
+      * @param index the index in 'frame' where the parsed type must be stored.
+      * @param charBuffer the buffer used to read strings in the constant pool.
+      * @param labels the labels of the method currently being parsed, indexed by their offset. If the
+      *     parsed type is an ITEM_Uninitialized, a new label for the corresponding NEW instruction is
+      *     stored in this array if it does not already exist.
+      * @return the end offset of the JVMS 'verification_type_info' structure.
+      */
+    private int readVerificationTypeInfo(
+            final int verificationTypeInfoOffset,
+            final Object[] frame,
+            final int index,
+            final char[] charBuffer,
+            final Label[] labels) {
+        int currentOffset = verificationTypeInfoOffset;
+        int tag = classFileBuffer[currentOffset++] & 0xFF;
+        switch (tag) {
+            case Frame.ITEM_TOP:
+                frame[index] = Opcodes.TOP;
+                break;
+            case Frame.ITEM_INTEGER:
+                frame[index] = Opcodes.INTEGER;
+                break;
+            case Frame.ITEM_FLOAT:
+                frame[index] = Opcodes.FLOAT;
+                break;
+            case Frame.ITEM_DOUBLE:
+                frame[index] = Opcodes.DOUBLE;
+                break;
+            case Frame.ITEM_LONG:
+                frame[index] = Opcodes.LONG;
+                break;
+            case Frame.ITEM_NULL:
+                frame[index] = Opcodes.NULL;
+                break;
+            case Frame.ITEM_UNINITIALIZED_THIS:
+                frame[index] = Opcodes.UNINITIALIZED_THIS;
+                break;
+            case Frame.ITEM_OBJECT:
+                frame[index] = readClass(currentOffset, charBuffer);
+                currentOffset += 2;
+                break;
+            case Frame.ITEM_UNINITIALIZED:
+                frame[index] = createLabel(readUnsignedShort(currentOffset), labels);
+                currentOffset += 2;
+                break;
+            default:
+                throw new IllegalArgumentException();
+        }
+        return currentOffset;
+    }
+
+    // ----------------------------------------------------------------------------------------------
+    // Methods to parse attributes
+    // ----------------------------------------------------------------------------------------------
+
+    /**
+      * Returns the offset in {@link #classFileBuffer} of the first ClassFile's 'attributes' array
+      * field entry.
+      *
+      * @return the offset in {@link #classFileBuffer} of the first ClassFile's 'attributes' array
+      *     field entry.
+      */
+    final int getFirstAttributeOffset() {
+        // Skip the access_flags, this_class, super_class, and interfaces_count fields (using 2 bytes
+        // each), as well as the interfaces array field (2 bytes per interface).
+        int currentOffset = header + 8 + readUnsignedShort(header + 6) * 2;
+
+        // Read the fields_count field.
+        int fieldsCount = readUnsignedShort(currentOffset);
+        currentOffset += 2;
+        // Skip the 'fields' array field.
+        while (fieldsCount-- > 0) {
+            // Invariant: currentOffset is the offset of a field_info structure.
+            // Skip the access_flags, name_index and descriptor_index fields (2 bytes each), and read the
+            // attributes_count field.
+            int attributesCount = readUnsignedShort(currentOffset + 6);
+            currentOffset += 8;
+            // Skip the 'attributes' array field.
+            while (attributesCount-- > 0) {
+                // Invariant: currentOffset is the offset of an attribute_info structure.
+                // Read the attribute_length field (2 bytes after the start of the attribute_info) and skip
+                // this many bytes, plus 6 for the attribute_name_index and attribute_length fields
+                // (yielding the total size of the attribute_info structure).
+                currentOffset += 6 + readInt(currentOffset + 2);
+            }
+        }
+
+        // Skip the methods_count and 'methods' fields, using the same method as above.
+        int methodsCount = readUnsignedShort(currentOffset);
+        currentOffset += 2;
+        while (methodsCount-- > 0) {
+            int attributesCount = readUnsignedShort(currentOffset + 6);
+            currentOffset += 8;
+            while (attributesCount-- > 0) {
+                currentOffset += 6 + readInt(currentOffset + 2);
+            }
+        }
+
+        // Skip the ClassFile's attributes_count field.
+        return currentOffset + 2;
+    }
+
+    /**
+      * Reads the BootstrapMethods attribute to compute the offset of each bootstrap method.
+      *
+      * @param maxStringLength a conservative estimate of the maximum length of the strings contained
+      *     in the constant pool of the class.
+      * @return the offsets of the bootstrap methods.
+      */
+    private int[] readBootstrapMethodsAttribute(final int maxStringLength) {
+        char[] charBuffer = new char[maxStringLength];
+        int currentAttributeOffset = getFirstAttributeOffset();
+        for (int i = readUnsignedShort(currentAttributeOffset - 2); i > 0; --i) {
+            // Read the attribute_info's attribute_name and attribute_length fields.
+            String attributeName = readUTF8(currentAttributeOffset, charBuffer);
+            int attributeLength = readInt(currentAttributeOffset + 2);
+            currentAttributeOffset += 6;
+            if (Constants.BOOTSTRAP_METHODS.equals(attributeName)) {
+                // Read the num_bootstrap_methods field and create an array of this size.
+                int[] result = new int[readUnsignedShort(currentAttributeOffset)];
+                // Compute and store the offset of each 'bootstrap_methods' array field entry.
+                int currentBootstrapMethodOffset = currentAttributeOffset + 2;
+                for (int j = 0; j < result.length; ++j) {
+                    result[j] = currentBootstrapMethodOffset;
+                    // Skip the bootstrap_method_ref and num_bootstrap_arguments fields (2 bytes each),
+                    // as well as the bootstrap_arguments array field (of size num_bootstrap_arguments * 2).
+                    currentBootstrapMethodOffset +=
+                            4 + readUnsignedShort(currentBootstrapMethodOffset + 2) * 2;
+                }
+                return result;
+            }
+            currentAttributeOffset += attributeLength;
+        }
+        throw new IllegalArgumentException();
+    }
+
+    /**
+      * Reads a non standard JVMS 'attribute' structure in {@link #classFileBuffer}.
+      *
+      * @param attributePrototypes prototypes of the attributes that must be parsed during the visit of
+      *     the class. Any attribute whose type is not equal to the type of one the prototypes will not
+      *     be parsed: its byte array value will be passed unchanged to the ClassWriter.
+      * @param type the type of the attribute.
+      * @param offset the start offset of the JVMS 'attribute' structure in {@link #classFileBuffer}.
+      *     The 6 attribute header bytes (attribute_name_index and attribute_length) are not taken into
+      *     account here.
+      * @param length the length of the attribute's content (excluding the 6 attribute header bytes).
+      * @param charBuffer the buffer to be used to read strings in the constant pool.
+      * @param codeAttributeOffset the start offset of the enclosing Code attribute in {@link
+      *     #classFileBuffer}, or -1 if the attribute to be read is not a code attribute. The 6
+      *     attribute header bytes (attribute_name_index and attribute_length) are not taken into
+      *     account here.
+      * @param labels the labels of the method's code, or {@literal null} if the attribute to be read
+      *     is not a code attribute.
+      * @return the attribute that has been read.
+      */
+    private Attribute readAttribute(
+            final Attribute[] attributePrototypes,
+            final String type,
+            final int offset,
+            final int length,
+            final char[] charBuffer,
+            final int codeAttributeOffset,
+            final Label[] labels) {
+        for (Attribute attributePrototype : attributePrototypes) {
+            if (attributePrototype.type.equals(type)) {
+                return attributePrototype.read(
+                        this, offset, length, charBuffer, codeAttributeOffset, labels);
+            }
+        }
+        return new Attribute(type).read(this, offset, length, null, -1, null);
+    }
+
+    // -----------------------------------------------------------------------------------------------
+    // Utility methods: low level parsing
+    // -----------------------------------------------------------------------------------------------
+
+    /**
+      * Returns the number of entries in the class's constant pool table.
+      *
+      * @return the number of entries in the class's constant pool table.
+      */
+    public int getItemCount() {
+        return cpInfoOffsets.length;
+    }
+
+    /**
+      * Returns the start offset in this {@link ClassReader} of a JVMS 'cp_info' structure (i.e. a
+      * constant pool entry), plus one. <i>This method is intended for {@link Attribute} sub classes,
+      * and is normally not needed by class generators or adapters.</i>
+      *
+      * @param constantPoolEntryIndex the index a constant pool entry in the class's constant pool
+      *     table.
+      * @return the start offset in this {@link ClassReader} of the corresponding JVMS 'cp_info'
+      *     structure, plus one.
+      */
+    public int getItem(final int constantPoolEntryIndex) {
+        return cpInfoOffsets[constantPoolEntryIndex];
+    }
+
+    /**
+      * Returns a conservative estimate of the maximum length of the strings contained in the class's
+      * constant pool table.
+      *
+      * @return a conservative estimate of the maximum length of the strings contained in the class's
+      *     constant pool table.
+      */
+    public int getMaxStringLength() {
+        return maxStringLength;
+    }
+
+    /**
+      * Reads a byte value in this {@link ClassReader}. <i>This method is intended for {@link
+      * Attribute} sub classes, and is normally not needed by class generators or adapters.</i>
+      *
+      * @param offset the start offset of the value to be read in this {@link ClassReader}.
+      * @return the read value.
+      */
+    public int readByte(final int offset) {
+        return classFileBuffer[offset] & 0xFF;
+    }
+
+    /**
+      * Reads an unsigned short value in this {@link ClassReader}. <i>This method is intended for
+      * {@link Attribute} sub classes, and is normally not needed by class generators or adapters.</i>
+      *
+      * @param offset the start index of the value to be read in this {@link ClassReader}.
+      * @return the read value.
+      */
+    public int readUnsignedShort(final int offset) {
+        byte[] classBuffer = classFileBuffer;
+        return ((classBuffer[offset] & 0xFF) << 8) | (classBuffer[offset + 1] & 0xFF);
+    }
+
+    /**
+      * Reads a signed short value in this {@link ClassReader}. <i>This method is intended for {@link
+      * Attribute} sub classes, and is normally not needed by class generators or adapters.</i>
+      *
+      * @param offset the start offset of the value to be read in this {@link ClassReader}.
+      * @return the read value.
+      */
+    public short readShort(final int offset) {
+        byte[] classBuffer = classFileBuffer;
+        return (short) (((classBuffer[offset] & 0xFF) << 8) | (classBuffer[offset + 1] & 0xFF));
+    }
+
+    /**
+      * Reads a signed int value in this {@link ClassReader}. <i>This method is intended for {@link
+      * Attribute} sub classes, and is normally not needed by class generators or adapters.</i>
+      *
+      * @param offset the start offset of the value to be read in this {@link ClassReader}.
+      * @return the read value.
+      */
+    public int readInt(final int offset) {
+        byte[] classBuffer = classFileBuffer;
+        return ((classBuffer[offset] & 0xFF) << 24)
+                | ((classBuffer[offset + 1] & 0xFF) << 16)
+                | ((classBuffer[offset + 2] & 0xFF) << 8)
+                | (classBuffer[offset + 3] & 0xFF);
+    }
+
+    /**
+      * Reads a signed long value in this {@link ClassReader}. <i>This method is intended for {@link
+      * Attribute} sub classes, and is normally not needed by class generators or adapters.</i>
+      *
+      * @param offset the start offset of the value to be read in this {@link ClassReader}.
+      * @return the read value.
+      */
+    public long readLong(final int offset) {
+        long l1 = readInt(offset);
+        long l0 = readInt(offset + 4) & 0xFFFFFFFFL;
+        return (l1 << 32) | l0;
+    }
+
+    /**
+      * Reads a CONSTANT_Utf8 constant pool entry in this {@link ClassReader}. <i>This method is
+      * intended for {@link Attribute} sub classes, and is normally not needed by class generators or
+      * adapters.</i>
+      *
+      * @param offset the start offset of an unsigned short value in this {@link ClassReader}, whose
+      *     value is the index of a CONSTANT_Utf8 entry in the class's constant pool table.
+      * @param charBuffer the buffer to be used to read the string. This buffer must be sufficiently
+      *     large. It is not automatically resized.
+      * @return the String corresponding to the specified CONSTANT_Utf8 entry.
+      */
+    // DontCheck(AbbreviationAsWordInName): can't be renamed (for backward binary compatibility).
+    public String readUTF8(final int offset, final char[] charBuffer) {
+        int constantPoolEntryIndex = readUnsignedShort(offset);
+        if (offset == 0 || constantPoolEntryIndex == 0) {
+            return null;
+        }
+        return readUtf(constantPoolEntryIndex, charBuffer);
+    }
+
+    /**
+      * Reads a CONSTANT_Utf8 constant pool entry in {@link #classFileBuffer}.
+      *
+      * @param constantPoolEntryIndex the index of a CONSTANT_Utf8 entry in the class's constant pool
+      *     table.
+      * @param charBuffer the buffer to be used to read the string. This buffer must be sufficiently
+      *     large. It is not automatically resized.
+      * @return the String corresponding to the specified CONSTANT_Utf8 entry.
+      */
+    final String readUtf(final int constantPoolEntryIndex, final char[] charBuffer) {
+        String value = constantUtf8Values[constantPoolEntryIndex];
+        if (value != null) {
+            return value;
+        }
+        int cpInfoOffset = cpInfoOffsets[constantPoolEntryIndex];
+        return constantUtf8Values[constantPoolEntryIndex] =
+                readUtf(cpInfoOffset + 2, readUnsignedShort(cpInfoOffset), charBuffer);
+    }
+
+    /**
+      * Reads an UTF8 string in {@link #classFileBuffer}.
+      *
+      * @param utfOffset the start offset of the UTF8 string to be read.
+      * @param utfLength the length of the UTF8 string to be read.
+      * @param charBuffer the buffer to be used to read the string. This buffer must be sufficiently
+      *     large. It is not automatically resized.
+      * @return the String corresponding to the specified UTF8 string.
+      */
+    private String readUtf(final int utfOffset, final int utfLength, final char[] charBuffer) {
+        int currentOffset = utfOffset;
+        int endOffset = currentOffset + utfLength;
+        int strLength = 0;
+        byte[] classBuffer = classFileBuffer;
+        while (currentOffset < endOffset) {
+            int currentByte = classBuffer[currentOffset++];
+            if ((currentByte & 0x80) == 0) {
+                charBuffer[strLength++] = (char) (currentByte & 0x7F);
+            } else if ((currentByte & 0xE0) == 0xC0) {
+                charBuffer[strLength++] =
+                        (char) (((currentByte & 0x1F) << 6) + (classBuffer[currentOffset++] & 0x3F));
+            } else {
+                charBuffer[strLength++] =
+                        (char)
+                                (((currentByte & 0xF) << 12)
+                                        + ((classBuffer[currentOffset++] & 0x3F) << 6)
+                                        + (classBuffer[currentOffset++] & 0x3F));
+            }
+        }
+        return new String(charBuffer, 0, strLength);
+    }
+
+    /**
+      * Reads a CONSTANT_Class, CONSTANT_String, CONSTANT_MethodType, CONSTANT_Module or
+      * CONSTANT_Package constant pool entry in {@link #classFileBuffer}. <i>This method is intended
+      * for {@link Attribute} sub classes, and is normally not needed by class generators or
+      * adapters.</i>
+      *
+      * @param offset the start offset of an unsigned short value in {@link #classFileBuffer}, whose
+      *     value is the index of a CONSTANT_Class, CONSTANT_String, CONSTANT_MethodType,
+      *     CONSTANT_Module or CONSTANT_Package entry in class's constant pool table.
+      * @param charBuffer the buffer to be used to read the item. This buffer must be sufficiently
+      *     large. It is not automatically resized.
+      * @return the String corresponding to the specified constant pool entry.
+      */
+    private String readStringish(final int offset, final char[] charBuffer) {
+        // Get the start offset of the cp_info structure (plus one), and read the CONSTANT_Utf8 entry
+        // designated by the first two bytes of this cp_info.
+        return readUTF8(cpInfoOffsets[readUnsignedShort(offset)], charBuffer);
+    }
+
+    /**
+      * Reads a CONSTANT_Class constant pool entry in this {@link ClassReader}. <i>This method is
+      * intended for {@link Attribute} sub classes, and is normally not needed by class generators or
+      * adapters.</i>
+      *
+      * @param offset the start offset of an unsigned short value in this {@link ClassReader}, whose
+      *     value is the index of a CONSTANT_Class entry in class's constant pool table.
+      * @param charBuffer the buffer to be used to read the item. This buffer must be sufficiently
+      *     large. It is not automatically resized.
+      * @return the String corresponding to the specified CONSTANT_Class entry.
+      */
+    public String readClass(final int offset, final char[] charBuffer) {
+        return readStringish(offset, charBuffer);
+    }
+
+    /**
+      * Reads a CONSTANT_Module constant pool entry in this {@link ClassReader}. <i>This method is
+      * intended for {@link Attribute} sub classes, and is normally not needed by class generators or
+      * adapters.</i>
+      *
+      * @param offset the start offset of an unsigned short value in this {@link ClassReader}, whose
+      *     value is the index of a CONSTANT_Module entry in class's constant pool table.
+      * @param charBuffer the buffer to be used to read the item. This buffer must be sufficiently
+      *     large. It is not automatically resized.
+      * @return the String corresponding to the specified CONSTANT_Module entry.
+      */
+    public String readModule(final int offset, final char[] charBuffer) {
+        return readStringish(offset, charBuffer);
+    }
+
+    /**
+      * Reads a CONSTANT_Package constant pool entry in this {@link ClassReader}. <i>This method is
+      * intended for {@link Attribute} sub classes, and is normally not needed by class generators or
+      * adapters.</i>
+      *
+      * @param offset the start offset of an unsigned short value in this {@link ClassReader}, whose
+      *     value is the index of a CONSTANT_Package entry in class's constant pool table.
+      * @param charBuffer the buffer to be used to read the item. This buffer must be sufficiently
+      *     large. It is not automatically resized.
+      * @return the String corresponding to the specified CONSTANT_Package entry.
+      */
+    public String readPackage(final int offset, final char[] charBuffer) {
+        return readStringish(offset, charBuffer);
+    }
+
+    /**
+      * Reads a CONSTANT_Dynamic constant pool entry in {@link #classFileBuffer}.
+      *
+      * @param constantPoolEntryIndex the index of a CONSTANT_Dynamic entry in the class's constant
+      *     pool table.
+      * @param charBuffer the buffer to be used to read the string. This buffer must be sufficiently
+      *     large. It is not automatically resized.
+      * @return the ConstantDynamic corresponding to the specified CONSTANT_Dynamic entry.
+      */
+    private ConstantDynamic readConstantDynamic(
+            final int constantPoolEntryIndex, final char[] charBuffer) {
+        ConstantDynamic constantDynamic = constantDynamicValues[constantPoolEntryIndex];
+        if (constantDynamic != null) {
+            return constantDynamic;
+        }
+        int cpInfoOffset = cpInfoOffsets[constantPoolEntryIndex];
+        int nameAndTypeCpInfoOffset = cpInfoOffsets[readUnsignedShort(cpInfoOffset + 2)];
+        String name = readUTF8(nameAndTypeCpInfoOffset, charBuffer);
+        String descriptor = readUTF8(nameAndTypeCpInfoOffset + 2, charBuffer);
+        int bootstrapMethodOffset = bootstrapMethodOffsets[readUnsignedShort(cpInfoOffset)];
+        Handle handle = (Handle) readConst(readUnsignedShort(bootstrapMethodOffset), charBuffer);
+        Object[] bootstrapMethodArguments = new Object[readUnsignedShort(bootstrapMethodOffset + 2)];
+        bootstrapMethodOffset += 4;
+        for (int i = 0; i < bootstrapMethodArguments.length; i++) {
+            bootstrapMethodArguments[i] = readConst(readUnsignedShort(bootstrapMethodOffset), charBuffer);
+            bootstrapMethodOffset += 2;
+        }
+        return constantDynamicValues[constantPoolEntryIndex] =
+                new ConstantDynamic(name, descriptor, handle, bootstrapMethodArguments);
+    }
+
+    /**
+      * Reads a numeric or string constant pool entry in this {@link ClassReader}. <i>This method is
+      * intended for {@link Attribute} sub classes, and is normally not needed by class generators or
+      * adapters.</i>
+      *
+      * @param constantPoolEntryIndex the index of a CONSTANT_Integer, CONSTANT_Float, CONSTANT_Long,
+      *     CONSTANT_Double, CONSTANT_Class, CONSTANT_String, CONSTANT_MethodType,
+      *     CONSTANT_MethodHandle or CONSTANT_Dynamic entry in the class's constant pool.
+      * @param charBuffer the buffer to be used to read strings. This buffer must be sufficiently
+      *     large. It is not automatically resized.
+      * @return the {@link Integer}, {@link Float}, {@link Long}, {@link Double}, {@link String},
+      *     {@link Type}, {@link Handle} or {@link ConstantDynamic} corresponding to the specified
+      *     constant pool entry.
+      */
+    public Object readConst(final int constantPoolEntryIndex, final char[] charBuffer) {
+        int cpInfoOffset = cpInfoOffsets[constantPoolEntryIndex];
+        switch (classFileBuffer[cpInfoOffset - 1]) {
+            case Symbol.CONSTANT_INTEGER_TAG:
+                return readInt(cpInfoOffset);
+            case Symbol.CONSTANT_FLOAT_TAG:
+                return Float.intBitsToFloat(readInt(cpInfoOffset));
+            case Symbol.CONSTANT_LONG_TAG:
+                return readLong(cpInfoOffset);
+            case Symbol.CONSTANT_DOUBLE_TAG:
+                return Double.longBitsToDouble(readLong(cpInfoOffset));
+            case Symbol.CONSTANT_CLASS_TAG:
+                return Type.getObjectType(readUTF8(cpInfoOffset, charBuffer));
+            case Symbol.CONSTANT_STRING_TAG:
+                return readUTF8(cpInfoOffset, charBuffer);
+            case Symbol.CONSTANT_METHOD_TYPE_TAG:
+                return Type.getMethodType(readUTF8(cpInfoOffset, charBuffer));
+            case Symbol.CONSTANT_METHOD_HANDLE_TAG:
+                int referenceKind = readByte(cpInfoOffset);
+                int referenceCpInfoOffset = cpInfoOffsets[readUnsignedShort(cpInfoOffset + 1)];
+                int nameAndTypeCpInfoOffset = cpInfoOffsets[readUnsignedShort(referenceCpInfoOffset + 2)];
+                String owner = readClass(referenceCpInfoOffset, charBuffer);
+                String name = readUTF8(nameAndTypeCpInfoOffset, charBuffer);
+                String descriptor = readUTF8(nameAndTypeCpInfoOffset + 2, charBuffer);
+                boolean isInterface =
+                        classFileBuffer[referenceCpInfoOffset - 1] == Symbol.CONSTANT_INTERFACE_METHODREF_TAG;
+                return new Handle(referenceKind, owner, name, descriptor, isInterface);
+            case Symbol.CONSTANT_DYNAMIC_TAG:
+                return readConstantDynamic(constantPoolEntryIndex, charBuffer);
+            default:
+                throw new IllegalArgumentException();
+        }
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/org/objectweb/asm/ClassTooLargeException.class b/tests/test_data/std/jdk/internal/org/objectweb/asm/ClassTooLargeException.class
new file mode 100644
index 0000000000000000000000000000000000000000..f036989c40cb7b7af06102d05222bd5a3d27cccd
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diff --git a/tests/test_data/std/jdk/internal/org/objectweb/asm/ClassTooLargeException.java b/tests/test_data/std/jdk/internal/org/objectweb/asm/ClassTooLargeException.java
new file mode 100644
index 00000000..c110ec34
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/org/objectweb/asm/ClassTooLargeException.java
@@ -0,0 +1,104 @@
+/*
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/*
+ * This file is available under and governed by the GNU General Public
+ * License version 2 only, as published by the Free Software Foundation.
+ * However, the following notice accompanied the original version of this
+ * file:
+ *
+ * ASM: a very small and fast Java bytecode manipulation framework
+ * Copyright (c) 2000-2011 INRIA, France Telecom
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the copyright holders nor the names of its
+ *    contributors may be used to endorse or promote products derived from
+ *    this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+package jdk.internal.org.objectweb.asm;
+
+/**
+ * Exception thrown when the constant pool of a class produced by a {@link ClassWriter} is too
+ * large.
+ *
+ * @author Jason Zaugg
+ */
+public final class ClassTooLargeException extends IndexOutOfBoundsException {
+    private static final long serialVersionUID = 160715609518896765L;
+
+    private final String className;
+    private final int constantPoolCount;
+
+    /**
+      * Constructs a new {@link ClassTooLargeException}.
+      *
+      * @param className the internal name of the class (see {@link
+      *     jdk.internal.org.objectweb.asm.Type#getInternalName()}).
+      * @param constantPoolCount the number of constant pool items of the class.
+      */
+    public ClassTooLargeException(final String className, final int constantPoolCount) {
+        super("Class too large: " + className);
+        this.className = className;
+        this.constantPoolCount = constantPoolCount;
+    }
+
+    /**
+      * Returns the internal name of the class (see {@link jdk.internal.org.objectweb.asm.Type#getInternalName()}).
+      *
+      * @return the internal name of the class.
+      */
+    public String getClassName() {
+        return className;
+    }
+
+    /**
+      * Returns the number of constant pool items of the class.
+      *
+      * @return the number of constant pool items of the class.
+      */
+    public int getConstantPoolCount() {
+        return constantPoolCount;
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/org/objectweb/asm/ClassVisitor.class b/tests/test_data/std/jdk/internal/org/objectweb/asm/ClassVisitor.class
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diff --git a/tests/test_data/std/jdk/internal/org/objectweb/asm/ClassVisitor.java b/tests/test_data/std/jdk/internal/org/objectweb/asm/ClassVisitor.java
new file mode 100644
index 00000000..21a9c721
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/org/objectweb/asm/ClassVisitor.java
@@ -0,0 +1,426 @@
+/*
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/*
+ * This file is available under and governed by the GNU General Public
+ * License version 2 only, as published by the Free Software Foundation.
+ * However, the following notice accompanied the original version of this
+ * file:
+ *
+ * ASM: a very small and fast Java bytecode manipulation framework
+ * Copyright (c) 2000-2011 INRIA, France Telecom
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the copyright holders nor the names of its
+ *    contributors may be used to endorse or promote products derived from
+ *    this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+package jdk.internal.org.objectweb.asm;
+
+/**
+ * A visitor to visit a Java class. The methods of this class must be called in the following order:
+ * {@code visit} [ {@code visitSource} ] [ {@code visitModule} ][ {@code visitNestHost} ][ {@code
+ * visitOuterClass} ] ( {@code visitAnnotation} | {@code visitTypeAnnotation} | {@code
+ * visitAttribute} )* ( {@code visitNestMember} | [ {@code * visitPermittedSubclass} ] | {@code
+ * visitInnerClass} | {@code visitRecordComponent} | {@code visitField} | {@code visitMethod} )*
+ * {@code visitEnd}.
+ *
+ * @author Eric Bruneton
+ */
+public abstract class ClassVisitor {
+
+    /**
+      * The ASM API version implemented by this visitor. The value of this field must be one of the
+      * {@code ASM}<i>x</i> values in {@link Opcodes}.
+      */
+    protected final int api;
+
+    /** The class visitor to which this visitor must delegate method calls. May be {@literal null}. */
+    protected ClassVisitor cv;
+
+    /**
+      * Constructs a new {@link ClassVisitor}.
+      *
+      * @param api the ASM API version implemented by this visitor. Must be one of the {@code
+      *     ASM}<i>x</i> values in {@link Opcodes}.
+      */
+    protected ClassVisitor(final int api) {
+        this(api, null);
+    }
+
+    /**
+      * Constructs a new {@link ClassVisitor}.
+      *
+      * @param api the ASM API version implemented by this visitor. Must be one of the {@code
+      *     ASM}<i>x</i> values in {@link Opcodes}.
+      * @param classVisitor the class visitor to which this visitor must delegate method calls. May be
+      *     null.
+      */
+    protected ClassVisitor(final int api, final ClassVisitor classVisitor) {
+        if (api != Opcodes.ASM9
+                && api != Opcodes.ASM8
+                && api != Opcodes.ASM7
+                && api != Opcodes.ASM6
+                && api != Opcodes.ASM5
+                && api != Opcodes.ASM4) {
+            throw new IllegalArgumentException("Unsupported api " + api);
+        }
+        this.api = api;
+        this.cv = classVisitor;
+    }
+
+    /**
+      * The class visitor to which this visitor must delegate method calls. May be {@literal null}.
+      *
+      * @return the class visitor to which this visitor must delegate method calls, or {@literal null}.
+      */
+    public ClassVisitor getDelegate() {
+        return cv;
+    }
+
+    /**
+      * Visits the header of the class.
+      *
+      * @param version the class version. The minor version is stored in the 16 most significant bits,
+      *     and the major version in the 16 least significant bits.
+      * @param access the class's access flags (see {@link Opcodes}). This parameter also indicates if
+      *     the class is deprecated {@link Opcodes#ACC_DEPRECATED} or a record {@link
+      *     Opcodes#ACC_RECORD}.
+      * @param name the internal name of the class (see {@link Type#getInternalName()}).
+      * @param signature the signature of this class. May be {@literal null} if the class is not a
+      *     generic one, and does not extend or implement generic classes or interfaces.
+      * @param superName the internal of name of the super class (see {@link Type#getInternalName()}).
+      *     For interfaces, the super class is {@link Object}. May be {@literal null}, but only for the
+      *     {@link Object} class.
+      * @param interfaces the internal names of the class's interfaces (see {@link
+      *     Type#getInternalName()}). May be {@literal null}.
+      */
+    public void visit(
+            final int version,
+            final int access,
+            final String name,
+            final String signature,
+            final String superName,
+            final String[] interfaces) {
+        if (api < Opcodes.ASM8 && (access & Opcodes.ACC_RECORD) != 0) {
+            throw new UnsupportedOperationException("Records requires ASM8");
+        }
+        if (cv != null) {
+            cv.visit(version, access, name, signature, superName, interfaces);
+        }
+    }
+
+    /**
+      * Visits the source of the class.
+      *
+      * @param source the name of the source file from which the class was compiled. May be {@literal
+      *     null}.
+      * @param debug additional debug information to compute the correspondence between source and
+      *     compiled elements of the class. May be {@literal null}.
+      */
+    public void visitSource(final String source, final String debug) {
+        if (cv != null) {
+            cv.visitSource(source, debug);
+        }
+    }
+
+    /**
+      * Visit the module corresponding to the class.
+      *
+      * @param name the fully qualified name (using dots) of the module.
+      * @param access the module access flags, among {@code ACC_OPEN}, {@code ACC_SYNTHETIC} and {@code
+      *     ACC_MANDATED}.
+      * @param version the module version, or {@literal null}.
+      * @return a visitor to visit the module values, or {@literal null} if this visitor is not
+      *     interested in visiting this module.
+      */
+    public ModuleVisitor visitModule(final String name, final int access, final String version) {
+        if (api < Opcodes.ASM6) {
+            throw new UnsupportedOperationException("Module requires ASM6");
+        }
+        if (cv != null) {
+            return cv.visitModule(name, access, version);
+        }
+        return null;
+    }
+
+    /**
+      * Visits the nest host class of the class. A nest is a set of classes of the same package that
+      * share access to their private members. One of these classes, called the host, lists the other
+      * members of the nest, which in turn should link to the host of their nest. This method must be
+      * called only once and only if the visited class is a non-host member of a nest. A class is
+      * implicitly its own nest, so it's invalid to call this method with the visited class name as
+      * argument.
+      *
+      * @param nestHost the internal name of the host class of the nest (see {@link
+      *     Type#getInternalName()}).
+      */
+    public void visitNestHost(final String nestHost) {
+        if (api < Opcodes.ASM7) {
+            throw new UnsupportedOperationException("NestHost requires ASM7");
+        }
+        if (cv != null) {
+            cv.visitNestHost(nestHost);
+        }
+    }
+
+    /**
+      * Visits the enclosing class of the class. This method must be called only if this class is a
+      * local or anonymous class. See the JVMS 4.7.7 section for more details.
+      *
+      * @param owner internal name of the enclosing class of the class (see {@link
+      *     Type#getInternalName()}).
+      * @param name the name of the method that contains the class, or {@literal null} if the class is
+      *     not enclosed in a method or constructor of its enclosing class (e.g. if it is enclosed in
+      *     an instance initializer, static initializer, instance variable initializer, or class
+      *     variable initializer).
+      * @param descriptor the descriptor of the method that contains the class, or {@literal null} if
+      *     the class is not enclosed in a method or constructor of its enclosing class (e.g. if it is
+      *     enclosed in an instance initializer, static initializer, instance variable initializer, or
+      *     class variable initializer).
+      */
+    public void visitOuterClass(final String owner, final String name, final String descriptor) {
+        if (cv != null) {
+            cv.visitOuterClass(owner, name, descriptor);
+        }
+    }
+
+    /**
+      * Visits an annotation of the class.
+      *
+      * @param descriptor the class descriptor of the annotation class.
+      * @param visible {@literal true} if the annotation is visible at runtime.
+      * @return a visitor to visit the annotation values, or {@literal null} if this visitor is not
+      *     interested in visiting this annotation.
+      */
+    public AnnotationVisitor visitAnnotation(final String descriptor, final boolean visible) {
+        if (cv != null) {
+            return cv.visitAnnotation(descriptor, visible);
+        }
+        return null;
+    }
+
+    /**
+      * Visits an annotation on a type in the class signature.
+      *
+      * @param typeRef a reference to the annotated type. The sort of this type reference must be
+      *     {@link TypeReference#CLASS_TYPE_PARAMETER}, {@link
+      *     TypeReference#CLASS_TYPE_PARAMETER_BOUND} or {@link TypeReference#CLASS_EXTENDS}. See
+      *     {@link TypeReference}.
+      * @param typePath the path to the annotated type argument, wildcard bound, array element type, or
+      *     static inner type within 'typeRef'. May be {@literal null} if the annotation targets
+      *     'typeRef' as a whole.
+      * @param descriptor the class descriptor of the annotation class.
+      * @param visible {@literal true} if the annotation is visible at runtime.
+      * @return a visitor to visit the annotation values, or {@literal null} if this visitor is not
+      *     interested in visiting this annotation.
+      */
+    public AnnotationVisitor visitTypeAnnotation(
+            final int typeRef, final TypePath typePath, final String descriptor, final boolean visible) {
+        if (api < Opcodes.ASM5) {
+            throw new UnsupportedOperationException("TypeAnnotation requires ASM5");
+        }
+        if (cv != null) {
+            return cv.visitTypeAnnotation(typeRef, typePath, descriptor, visible);
+        }
+        return null;
+    }
+
+    /**
+      * Visits a non standard attribute of the class.
+      *
+      * @param attribute an attribute.
+      */
+    public void visitAttribute(final Attribute attribute) {
+        if (cv != null) {
+            cv.visitAttribute(attribute);
+        }
+    }
+
+    /**
+      * Visits a member of the nest. A nest is a set of classes of the same package that share access
+      * to their private members. One of these classes, called the host, lists the other members of the
+      * nest, which in turn should link to the host of their nest. This method must be called only if
+      * the visited class is the host of a nest. A nest host is implicitly a member of its own nest, so
+      * it's invalid to call this method with the visited class name as argument.
+      *
+      * @param nestMember the internal name of a nest member (see {@link Type#getInternalName()}).
+      */
+    public void visitNestMember(final String nestMember) {
+        if (api < Opcodes.ASM7) {
+            throw new UnsupportedOperationException("NestMember requires ASM7");
+        }
+        if (cv != null) {
+            cv.visitNestMember(nestMember);
+        }
+    }
+
+    /**
+      * Visits a permitted subclasses. A permitted subclass is one of the allowed subclasses of the
+      * current class.
+      *
+      * @param permittedSubclass the internal name of a permitted subclass (see {@link
+      *     Type#getInternalName()}).
+      */
+    public void visitPermittedSubclass(final String permittedSubclass) {
+        if (api < Opcodes.ASM9) {
+            throw new UnsupportedOperationException("PermittedSubclasses requires ASM9");
+        }
+        if (cv != null) {
+            cv.visitPermittedSubclass(permittedSubclass);
+        }
+    }
+
+    /**
+      * Visits information about an inner class. This inner class is not necessarily a member of the
+      * class being visited. More precisely, every class or interface C which is referenced by this
+      * class and which is not a package member must be visited with this method. This class must
+      * reference its nested class or interface members, and its enclosing class, if any. See the JVMS
+      * 4.7.6 section for more details.
+      *
+      * @param name the internal name of C (see {@link Type#getInternalName()}).
+      * @param outerName the internal name of the class or interface C is a member of (see {@link
+      *     Type#getInternalName()}). Must be {@literal null} if C is not the member of a class or
+      *     interface (e.g. for local or anonymous classes).
+      * @param innerName the (simple) name of C. Must be {@literal null} for anonymous inner classes.
+      * @param access the access flags of C originally declared in the source code from which this
+      *     class was compiled.
+      */
+    public void visitInnerClass(
+            final String name, final String outerName, final String innerName, final int access) {
+        if (cv != null) {
+            cv.visitInnerClass(name, outerName, innerName, access);
+        }
+    }
+
+    /**
+      * Visits a record component of the class.
+      *
+      * @param name the record component name.
+      * @param descriptor the record component descriptor (see {@link Type}).
+      * @param signature the record component signature. May be {@literal null} if the record component
+      *     type does not use generic types.
+      * @return a visitor to visit this record component annotations and attributes, or {@literal null}
+      *     if this class visitor is not interested in visiting these annotations and attributes.
+      */
+    public RecordComponentVisitor visitRecordComponent(
+            final String name, final String descriptor, final String signature) {
+        if (api < Opcodes.ASM8) {
+            throw new UnsupportedOperationException("Record requires ASM8");
+        }
+        if (cv != null) {
+            return cv.visitRecordComponent(name, descriptor, signature);
+        }
+        return null;
+    }
+
+    /**
+      * Visits a field of the class.
+      *
+      * @param access the field's access flags (see {@link Opcodes}). This parameter also indicates if
+      *     the field is synthetic and/or deprecated.
+      * @param name the field's name.
+      * @param descriptor the field's descriptor (see {@link Type}).
+      * @param signature the field's signature. May be {@literal null} if the field's type does not use
+      *     generic types.
+      * @param value the field's initial value. This parameter, which may be {@literal null} if the
+      *     field does not have an initial value, must be an {@link Integer}, a {@link Float}, a {@link
+      *     Long}, a {@link Double} or a {@link String} (for {@code int}, {@code float}, {@code long}
+      *     or {@code String} fields respectively). <i>This parameter is only used for static
+      *     fields</i>. Its value is ignored for non static fields, which must be initialized through
+      *     bytecode instructions in constructors or methods.
+      * @return a visitor to visit field annotations and attributes, or {@literal null} if this class
+      *     visitor is not interested in visiting these annotations and attributes.
+      */
+    public FieldVisitor visitField(
+            final int access,
+            final String name,
+            final String descriptor,
+            final String signature,
+            final Object value) {
+        if (cv != null) {
+            return cv.visitField(access, name, descriptor, signature, value);
+        }
+        return null;
+    }
+
+    /**
+      * Visits a method of the class. This method <i>must</i> return a new {@link MethodVisitor}
+      * instance (or {@literal null}) each time it is called, i.e., it should not return a previously
+      * returned visitor.
+      *
+      * @param access the method's access flags (see {@link Opcodes}). This parameter also indicates if
+      *     the method is synthetic and/or deprecated.
+      * @param name the method's name.
+      * @param descriptor the method's descriptor (see {@link Type}).
+      * @param signature the method's signature. May be {@literal null} if the method parameters,
+      *     return type and exceptions do not use generic types.
+      * @param exceptions the internal names of the method's exception classes (see {@link
+      *     Type#getInternalName()}). May be {@literal null}.
+      * @return an object to visit the byte code of the method, or {@literal null} if this class
+      *     visitor is not interested in visiting the code of this method.
+      */
+    public MethodVisitor visitMethod(
+            final int access,
+            final String name,
+            final String descriptor,
+            final String signature,
+            final String[] exceptions) {
+        if (cv != null) {
+            return cv.visitMethod(access, name, descriptor, signature, exceptions);
+        }
+        return null;
+    }
+
+    /**
+      * Visits the end of the class. This method, which is the last one to be called, is used to inform
+      * the visitor that all the fields and methods of the class have been visited.
+      */
+    public void visitEnd() {
+        if (cv != null) {
+            cv.visitEnd();
+        }
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/org/objectweb/asm/ClassWriter.class b/tests/test_data/std/jdk/internal/org/objectweb/asm/ClassWriter.class
new file mode 100644
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zH9PR;(Rnr$wE(k4(d@PAP_tL4!wU9zX|u<pO^1Dz<a470+X<=j5K!>`Pw@YJ;s-8p
zYk7Hn4e$qV=N(mnnd>mc2caJA<QHW3PTTp+6`FQCFX(e<QuI$5r54gVDE)vGrCZb@
H8u-5e9m^+G

literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/org/objectweb/asm/ClassWriter.java b/tests/test_data/std/jdk/internal/org/objectweb/asm/ClassWriter.java
new file mode 100644
index 00000000..3996cbdf
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/org/objectweb/asm/ClassWriter.java
@@ -0,0 +1,1113 @@
+/*
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/*
+ * This file is available under and governed by the GNU General Public
+ * License version 2 only, as published by the Free Software Foundation.
+ * However, the following notice accompanied the original version of this
+ * file:
+ *
+ * ASM: a very small and fast Java bytecode manipulation framework
+ * Copyright (c) 2000-2011 INRIA, France Telecom
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the copyright holders nor the names of its
+ *    contributors may be used to endorse or promote products derived from
+ *    this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+package jdk.internal.org.objectweb.asm;
+
+/**
+ * A {@link ClassVisitor} that generates a corresponding ClassFile structure, as defined in the Java
+ * Virtual Machine Specification (JVMS). It can be used alone, to generate a Java class "from
+ * scratch", or with one or more {@link ClassReader} and adapter {@link ClassVisitor} to generate a
+ * modified class from one or more existing Java classes.
+ *
+ * @see <a href="https://docs.oracle.com/javase/specs/jvms/se9/html/jvms-4.html">JVMS 4</a>
+ * @author Eric Bruneton
+ */
+public class ClassWriter extends ClassVisitor {
+
+    /**
+      * A flag to automatically compute the maximum stack size and the maximum number of local
+      * variables of methods. If this flag is set, then the arguments of the {@link
+      * MethodVisitor#visitMaxs} method of the {@link MethodVisitor} returned by the {@link
+      * #visitMethod} method will be ignored, and computed automatically from the signature and the
+      * bytecode of each method.
+      *
+      * <p><b>Note:</b> for classes whose version is {@link Opcodes#V1_7} of more, this option requires
+      * valid stack map frames. The maximum stack size is then computed from these frames, and from the
+      * bytecode instructions in between. If stack map frames are not present or must be recomputed,
+      * used {@link #COMPUTE_FRAMES} instead.
+      *
+      * @see #ClassWriter(int)
+      */
+    public static final int COMPUTE_MAXS = 1;
+
+    /**
+      * A flag to automatically compute the stack map frames of methods from scratch. If this flag is
+      * set, then the calls to the {@link MethodVisitor#visitFrame} method are ignored, and the stack
+      * map frames are recomputed from the methods bytecode. The arguments of the {@link
+      * MethodVisitor#visitMaxs} method are also ignored and recomputed from the bytecode. In other
+      * words, {@link #COMPUTE_FRAMES} implies {@link #COMPUTE_MAXS}.
+      *
+      * @see #ClassWriter(int)
+      */
+    public static final int COMPUTE_FRAMES = 2;
+
+    /**
+      * The flags passed to the constructor. Must be zero or more of {@link #COMPUTE_MAXS} and {@link
+      * #COMPUTE_FRAMES}.
+      */
+    private final int flags;
+
+    // Note: fields are ordered as in the ClassFile structure, and those related to attributes are
+    // ordered as in Section 4.7 of the JVMS.
+
+    /**
+      * The minor_version and major_version fields of the JVMS ClassFile structure. minor_version is
+      * stored in the 16 most significant bits, and major_version in the 16 least significant bits.
+      */
+    private int version;
+
+    /** The symbol table for this class (contains the constant_pool and the BootstrapMethods). */
+    private final SymbolTable symbolTable;
+
+    /**
+      * The access_flags field of the JVMS ClassFile structure. This field can contain ASM specific
+      * access flags, such as {@link Opcodes#ACC_DEPRECATED} or {@link Opcodes#ACC_RECORD}, which are
+      * removed when generating the ClassFile structure.
+      */
+    private int accessFlags;
+
+    /** The this_class field of the JVMS ClassFile structure. */
+    private int thisClass;
+
+    /** The super_class field of the JVMS ClassFile structure. */
+    private int superClass;
+
+    /** The interface_count field of the JVMS ClassFile structure. */
+    private int interfaceCount;
+
+    /** The 'interfaces' array of the JVMS ClassFile structure. */
+    private int[] interfaces;
+
+    /**
+      * The fields of this class, stored in a linked list of {@link FieldWriter} linked via their
+      * {@link FieldWriter#fv} field. This field stores the first element of this list.
+      */
+    private FieldWriter firstField;
+
+    /**
+      * The fields of this class, stored in a linked list of {@link FieldWriter} linked via their
+      * {@link FieldWriter#fv} field. This field stores the last element of this list.
+      */
+    private FieldWriter lastField;
+
+    /**
+      * The methods of this class, stored in a linked list of {@link MethodWriter} linked via their
+      * {@link MethodWriter#mv} field. This field stores the first element of this list.
+      */
+    private MethodWriter firstMethod;
+
+    /**
+      * The methods of this class, stored in a linked list of {@link MethodWriter} linked via their
+      * {@link MethodWriter#mv} field. This field stores the last element of this list.
+      */
+    private MethodWriter lastMethod;
+
+    /** The number_of_classes field of the InnerClasses attribute, or 0. */
+    private int numberOfInnerClasses;
+
+    /** The 'classes' array of the InnerClasses attribute, or {@literal null}. */
+    private ByteVector innerClasses;
+
+    /** The class_index field of the EnclosingMethod attribute, or 0. */
+    private int enclosingClassIndex;
+
+    /** The method_index field of the EnclosingMethod attribute. */
+    private int enclosingMethodIndex;
+
+    /** The signature_index field of the Signature attribute, or 0. */
+    private int signatureIndex;
+
+    /** The source_file_index field of the SourceFile attribute, or 0. */
+    private int sourceFileIndex;
+
+    /** The debug_extension field of the SourceDebugExtension attribute, or {@literal null}. */
+    private ByteVector debugExtension;
+
+    /**
+      * The last runtime visible annotation of this class. The previous ones can be accessed with the
+      * {@link AnnotationWriter#previousAnnotation} field. May be {@literal null}.
+      */
+    private AnnotationWriter lastRuntimeVisibleAnnotation;
+
+    /**
+      * The last runtime invisible annotation of this class. The previous ones can be accessed with the
+      * {@link AnnotationWriter#previousAnnotation} field. May be {@literal null}.
+      */
+    private AnnotationWriter lastRuntimeInvisibleAnnotation;
+
+    /**
+      * The last runtime visible type annotation of this class. The previous ones can be accessed with
+      * the {@link AnnotationWriter#previousAnnotation} field. May be {@literal null}.
+      */
+    private AnnotationWriter lastRuntimeVisibleTypeAnnotation;
+
+    /**
+      * The last runtime invisible type annotation of this class. The previous ones can be accessed
+      * with the {@link AnnotationWriter#previousAnnotation} field. May be {@literal null}.
+      */
+    private AnnotationWriter lastRuntimeInvisibleTypeAnnotation;
+
+    /** The Module attribute of this class, or {@literal null}. */
+    private ModuleWriter moduleWriter;
+
+    /** The host_class_index field of the NestHost attribute, or 0. */
+    private int nestHostClassIndex;
+
+    /** The number_of_classes field of the NestMembers attribute, or 0. */
+    private int numberOfNestMemberClasses;
+
+    /** The 'classes' array of the NestMembers attribute, or {@literal null}. */
+    private ByteVector nestMemberClasses;
+
+    /** The number_of_classes field of the PermittedSubclasses attribute, or 0. */
+    private int numberOfPermittedSubclasses;
+
+    /** The 'classes' array of the PermittedSubclasses attribute, or {@literal null}. */
+    private ByteVector permittedSubclasses;
+
+    /**
+      * The record components of this class, stored in a linked list of {@link RecordComponentWriter}
+      * linked via their {@link RecordComponentWriter#delegate} field. This field stores the first
+      * element of this list.
+      */
+    private RecordComponentWriter firstRecordComponent;
+
+    /**
+      * The record components of this class, stored in a linked list of {@link RecordComponentWriter}
+      * linked via their {@link RecordComponentWriter#delegate} field. This field stores the last
+      * element of this list.
+      */
+    private RecordComponentWriter lastRecordComponent;
+
+    /**
+      * The first non standard attribute of this class. The next ones can be accessed with the {@link
+      * Attribute#nextAttribute} field. May be {@literal null}.
+      *
+      * <p><b>WARNING</b>: this list stores the attributes in the <i>reverse</i> order of their visit.
+      * firstAttribute is actually the last attribute visited in {@link #visitAttribute}. The {@link
+      * #toByteArray} method writes the attributes in the order defined by this list, i.e. in the
+      * reverse order specified by the user.
+      */
+    private Attribute firstAttribute;
+
+    /**
+      * Indicates what must be automatically computed in {@link MethodWriter}. Must be one of {@link
+      * MethodWriter#COMPUTE_NOTHING}, {@link MethodWriter#COMPUTE_MAX_STACK_AND_LOCAL}, {@link
+      * MethodWriter#COMPUTE_MAX_STACK_AND_LOCAL_FROM_FRAMES}, {@link
+      * MethodWriter#COMPUTE_INSERTED_FRAMES}, or {@link MethodWriter#COMPUTE_ALL_FRAMES}.
+      */
+    private int compute;
+
+    // -----------------------------------------------------------------------------------------------
+    // Constructor
+    // -----------------------------------------------------------------------------------------------
+
+    /**
+      * Constructs a new {@link ClassWriter} object.
+      *
+      * @param flags option flags that can be used to modify the default behavior of this class. Must
+      *     be zero or more of {@link #COMPUTE_MAXS} and {@link #COMPUTE_FRAMES}.
+      */
+    public ClassWriter(final int flags) {
+        this(null, flags);
+    }
+
+    /**
+      * Constructs a new {@link ClassWriter} object and enables optimizations for "mostly add" bytecode
+      * transformations. These optimizations are the following:
+      *
+      * <ul>
+      *   <li>The constant pool and bootstrap methods from the original class are copied as is in the
+      *       new class, which saves time. New constant pool entries and new bootstrap methods will be
+      *       added at the end if necessary, but unused constant pool entries or bootstrap methods
+      *       <i>won't be removed</i>.
+      *   <li>Methods that are not transformed are copied as is in the new class, directly from the
+      *       original class bytecode (i.e. without emitting visit events for all the method
+      *       instructions), which saves a <i>lot</i> of time. Untransformed methods are detected by
+      *       the fact that the {@link ClassReader} receives {@link MethodVisitor} objects that come
+      *       from a {@link ClassWriter} (and not from any other {@link ClassVisitor} instance).
+      * </ul>
+      *
+      * @param classReader the {@link ClassReader} used to read the original class. It will be used to
+      *     copy the entire constant pool and bootstrap methods from the original class and also to
+      *     copy other fragments of original bytecode where applicable.
+      * @param flags option flags that can be used to modify the default behavior of this class. Must
+      *     be zero or more of {@link #COMPUTE_MAXS} and {@link #COMPUTE_FRAMES}. <i>These option flags
+      *     do not affect methods that are copied as is in the new class. This means that neither the
+      *     maximum stack size nor the stack frames will be computed for these methods</i>.
+      */
+    @SuppressWarnings("this-escape")
+    public ClassWriter(final ClassReader classReader, final int flags) {
+        super(/* latest api = */ Opcodes.ASM9);
+        this.flags = flags;
+        symbolTable = classReader == null ? new SymbolTable(this) : new SymbolTable(this, classReader);
+        if ((flags & COMPUTE_FRAMES) != 0) {
+            compute = MethodWriter.COMPUTE_ALL_FRAMES;
+        } else if ((flags & COMPUTE_MAXS) != 0) {
+            compute = MethodWriter.COMPUTE_MAX_STACK_AND_LOCAL;
+        } else {
+            compute = MethodWriter.COMPUTE_NOTHING;
+        }
+    }
+
+    // -----------------------------------------------------------------------------------------------
+    // Accessors
+    // -----------------------------------------------------------------------------------------------
+
+    /**
+      * Returns true if all the given flags were passed to the constructor.
+      *
+      * @param flags some option flags. Must be zero or more of {@link #COMPUTE_MAXS} and {@link
+      *     #COMPUTE_FRAMES}.
+      * @return true if all the given flags, or more, were passed to the constructor.
+      */
+    public boolean hasFlags(final int flags) {
+        return (this.flags & flags) == flags;
+    }
+
+    // -----------------------------------------------------------------------------------------------
+    // Implementation of the ClassVisitor abstract class
+    // -----------------------------------------------------------------------------------------------
+
+    @Override
+    public final void visit(
+            final int version,
+            final int access,
+            final String name,
+            final String signature,
+            final String superName,
+            final String[] interfaces) {
+        this.version = version;
+        this.accessFlags = access;
+        this.thisClass = symbolTable.setMajorVersionAndClassName(version & 0xFFFF, name);
+        if (signature != null) {
+            this.signatureIndex = symbolTable.addConstantUtf8(signature);
+        }
+        this.superClass = superName == null ? 0 : symbolTable.addConstantClass(superName).index;
+        if (interfaces != null && interfaces.length > 0) {
+            interfaceCount = interfaces.length;
+            this.interfaces = new int[interfaceCount];
+            for (int i = 0; i < interfaceCount; ++i) {
+                this.interfaces[i] = symbolTable.addConstantClass(interfaces[i]).index;
+            }
+        }
+        if (compute == MethodWriter.COMPUTE_MAX_STACK_AND_LOCAL && (version & 0xFFFF) >= Opcodes.V1_7) {
+            compute = MethodWriter.COMPUTE_MAX_STACK_AND_LOCAL_FROM_FRAMES;
+        }
+    }
+
+    @Override
+    public final void visitSource(final String file, final String debug) {
+        if (file != null) {
+            sourceFileIndex = symbolTable.addConstantUtf8(file);
+        }
+        if (debug != null) {
+            debugExtension = new ByteVector().encodeUtf8(debug, 0, Integer.MAX_VALUE);
+        }
+    }
+
+    @Override
+    public final ModuleVisitor visitModule(
+            final String name, final int access, final String version) {
+        return moduleWriter =
+                new ModuleWriter(
+                        symbolTable,
+                        symbolTable.addConstantModule(name).index,
+                        access,
+                        version == null ? 0 : symbolTable.addConstantUtf8(version));
+    }
+
+    @Override
+    public final void visitNestHost(final String nestHost) {
+        nestHostClassIndex = symbolTable.addConstantClass(nestHost).index;
+    }
+
+    @Override
+    public final void visitOuterClass(
+            final String owner, final String name, final String descriptor) {
+        enclosingClassIndex = symbolTable.addConstantClass(owner).index;
+        if (name != null && descriptor != null) {
+            enclosingMethodIndex = symbolTable.addConstantNameAndType(name, descriptor);
+        }
+    }
+
+    @Override
+    public final AnnotationVisitor visitAnnotation(final String descriptor, final boolean visible) {
+        if (visible) {
+            return lastRuntimeVisibleAnnotation =
+                    AnnotationWriter.create(symbolTable, descriptor, lastRuntimeVisibleAnnotation);
+        } else {
+            return lastRuntimeInvisibleAnnotation =
+                    AnnotationWriter.create(symbolTable, descriptor, lastRuntimeInvisibleAnnotation);
+        }
+    }
+
+    @Override
+    public final AnnotationVisitor visitTypeAnnotation(
+            final int typeRef, final TypePath typePath, final String descriptor, final boolean visible) {
+        if (visible) {
+            return lastRuntimeVisibleTypeAnnotation =
+                    AnnotationWriter.create(
+                            symbolTable, typeRef, typePath, descriptor, lastRuntimeVisibleTypeAnnotation);
+        } else {
+            return lastRuntimeInvisibleTypeAnnotation =
+                    AnnotationWriter.create(
+                            symbolTable, typeRef, typePath, descriptor, lastRuntimeInvisibleTypeAnnotation);
+        }
+    }
+
+    @Override
+    public final void visitAttribute(final Attribute attribute) {
+        // Store the attributes in the <i>reverse</i> order of their visit by this method.
+        attribute.nextAttribute = firstAttribute;
+        firstAttribute = attribute;
+    }
+
+    @Override
+    public final void visitNestMember(final String nestMember) {
+        if (nestMemberClasses == null) {
+            nestMemberClasses = new ByteVector();
+        }
+        ++numberOfNestMemberClasses;
+        nestMemberClasses.putShort(symbolTable.addConstantClass(nestMember).index);
+    }
+
+    @Override
+    public final void visitPermittedSubclass(final String permittedSubclass) {
+        if (permittedSubclasses == null) {
+            permittedSubclasses = new ByteVector();
+        }
+        ++numberOfPermittedSubclasses;
+        permittedSubclasses.putShort(symbolTable.addConstantClass(permittedSubclass).index);
+    }
+
+    @Override
+    public final void visitInnerClass(
+            final String name, final String outerName, final String innerName, final int access) {
+        if (innerClasses == null) {
+            innerClasses = new ByteVector();
+        }
+        // Section 4.7.6 of the JVMS states "Every CONSTANT_Class_info entry in the constant_pool table
+        // which represents a class or interface C that is not a package member must have exactly one
+        // corresponding entry in the classes array". To avoid duplicates we keep track in the info
+        // field of the Symbol of each CONSTANT_Class_info entry C whether an inner class entry has
+        // already been added for C. If so, we store the index of this inner class entry (plus one) in
+        // the info field. This trick allows duplicate detection in O(1) time.
+        Symbol nameSymbol = symbolTable.addConstantClass(name);
+        if (nameSymbol.info == 0) {
+            ++numberOfInnerClasses;
+            innerClasses.putShort(nameSymbol.index);
+            innerClasses.putShort(outerName == null ? 0 : symbolTable.addConstantClass(outerName).index);
+            innerClasses.putShort(innerName == null ? 0 : symbolTable.addConstantUtf8(innerName));
+            innerClasses.putShort(access);
+            nameSymbol.info = numberOfInnerClasses;
+        }
+        // Else, compare the inner classes entry nameSymbol.info - 1 with the arguments of this method
+        // and throw an exception if there is a difference?
+    }
+
+    @Override
+    public final RecordComponentVisitor visitRecordComponent(
+            final String name, final String descriptor, final String signature) {
+        RecordComponentWriter recordComponentWriter =
+                new RecordComponentWriter(symbolTable, name, descriptor, signature);
+        if (firstRecordComponent == null) {
+            firstRecordComponent = recordComponentWriter;
+        } else {
+            lastRecordComponent.delegate = recordComponentWriter;
+        }
+        return lastRecordComponent = recordComponentWriter;
+    }
+
+    @Override
+    public final FieldVisitor visitField(
+            final int access,
+            final String name,
+            final String descriptor,
+            final String signature,
+            final Object value) {
+        FieldWriter fieldWriter =
+                new FieldWriter(symbolTable, access, name, descriptor, signature, value);
+        if (firstField == null) {
+            firstField = fieldWriter;
+        } else {
+            lastField.fv = fieldWriter;
+        }
+        return lastField = fieldWriter;
+    }
+
+    @Override
+    public final MethodVisitor visitMethod(
+            final int access,
+            final String name,
+            final String descriptor,
+            final String signature,
+            final String[] exceptions) {
+        MethodWriter methodWriter =
+                new MethodWriter(symbolTable, access, name, descriptor, signature, exceptions, compute);
+        if (firstMethod == null) {
+            firstMethod = methodWriter;
+        } else {
+            lastMethod.mv = methodWriter;
+        }
+        return lastMethod = methodWriter;
+    }
+
+    @Override
+    public final void visitEnd() {
+        // Nothing to do.
+    }
+
+    // -----------------------------------------------------------------------------------------------
+    // Other public methods
+    // -----------------------------------------------------------------------------------------------
+
+    /**
+      * Returns the content of the class file that was built by this ClassWriter.
+      *
+      * @return the binary content of the JVMS ClassFile structure that was built by this ClassWriter.
+      * @throws ClassTooLargeException if the constant pool of the class is too large.
+      * @throws MethodTooLargeException if the Code attribute of a method is too large.
+      */
+    public byte[] toByteArray() {
+        // First step: compute the size in bytes of the ClassFile structure.
+        // The magic field uses 4 bytes, 10 mandatory fields (minor_version, major_version,
+        // constant_pool_count, access_flags, this_class, super_class, interfaces_count, fields_count,
+        // methods_count and attributes_count) use 2 bytes each, and each interface uses 2 bytes too.
+        int size = 24 + 2 * interfaceCount;
+        int fieldsCount = 0;
+        FieldWriter fieldWriter = firstField;
+        while (fieldWriter != null) {
+            ++fieldsCount;
+            size += fieldWriter.computeFieldInfoSize();
+            fieldWriter = (FieldWriter) fieldWriter.fv;
+        }
+        int methodsCount = 0;
+        MethodWriter methodWriter = firstMethod;
+        while (methodWriter != null) {
+            ++methodsCount;
+            size += methodWriter.computeMethodInfoSize();
+            methodWriter = (MethodWriter) methodWriter.mv;
+        }
+
+        // For ease of reference, we use here the same attribute order as in Section 4.7 of the JVMS.
+        int attributesCount = 0;
+        if (innerClasses != null) {
+            ++attributesCount;
+            size += 8 + innerClasses.length;
+            symbolTable.addConstantUtf8(Constants.INNER_CLASSES);
+        }
+        if (enclosingClassIndex != 0) {
+            ++attributesCount;
+            size += 10;
+            symbolTable.addConstantUtf8(Constants.ENCLOSING_METHOD);
+        }
+        if ((accessFlags & Opcodes.ACC_SYNTHETIC) != 0 && (version & 0xFFFF) < Opcodes.V1_5) {
+            ++attributesCount;
+            size += 6;
+            symbolTable.addConstantUtf8(Constants.SYNTHETIC);
+        }
+        if (signatureIndex != 0) {
+            ++attributesCount;
+            size += 8;
+            symbolTable.addConstantUtf8(Constants.SIGNATURE);
+        }
+        if (sourceFileIndex != 0) {
+            ++attributesCount;
+            size += 8;
+            symbolTable.addConstantUtf8(Constants.SOURCE_FILE);
+        }
+        if (debugExtension != null) {
+            ++attributesCount;
+            size += 6 + debugExtension.length;
+            symbolTable.addConstantUtf8(Constants.SOURCE_DEBUG_EXTENSION);
+        }
+        if ((accessFlags & Opcodes.ACC_DEPRECATED) != 0) {
+            ++attributesCount;
+            size += 6;
+            symbolTable.addConstantUtf8(Constants.DEPRECATED);
+        }
+        if (lastRuntimeVisibleAnnotation != null) {
+            ++attributesCount;
+            size +=
+                    lastRuntimeVisibleAnnotation.computeAnnotationsSize(
+                            Constants.RUNTIME_VISIBLE_ANNOTATIONS);
+        }
+        if (lastRuntimeInvisibleAnnotation != null) {
+            ++attributesCount;
+            size +=
+                    lastRuntimeInvisibleAnnotation.computeAnnotationsSize(
+                            Constants.RUNTIME_INVISIBLE_ANNOTATIONS);
+        }
+        if (lastRuntimeVisibleTypeAnnotation != null) {
+            ++attributesCount;
+            size +=
+                    lastRuntimeVisibleTypeAnnotation.computeAnnotationsSize(
+                            Constants.RUNTIME_VISIBLE_TYPE_ANNOTATIONS);
+        }
+        if (lastRuntimeInvisibleTypeAnnotation != null) {
+            ++attributesCount;
+            size +=
+                    lastRuntimeInvisibleTypeAnnotation.computeAnnotationsSize(
+                            Constants.RUNTIME_INVISIBLE_TYPE_ANNOTATIONS);
+        }
+        if (symbolTable.computeBootstrapMethodsSize() > 0) {
+            ++attributesCount;
+            size += symbolTable.computeBootstrapMethodsSize();
+        }
+        if (moduleWriter != null) {
+            attributesCount += moduleWriter.getAttributeCount();
+            size += moduleWriter.computeAttributesSize();
+        }
+        if (nestHostClassIndex != 0) {
+            ++attributesCount;
+            size += 8;
+            symbolTable.addConstantUtf8(Constants.NEST_HOST);
+        }
+        if (nestMemberClasses != null) {
+            ++attributesCount;
+            size += 8 + nestMemberClasses.length;
+            symbolTable.addConstantUtf8(Constants.NEST_MEMBERS);
+        }
+        if (permittedSubclasses != null) {
+            ++attributesCount;
+            size += 8 + permittedSubclasses.length;
+            symbolTable.addConstantUtf8(Constants.PERMITTED_SUBCLASSES);
+        }
+        int recordComponentCount = 0;
+        int recordSize = 0;
+        if ((accessFlags & Opcodes.ACC_RECORD) != 0 || firstRecordComponent != null) {
+            RecordComponentWriter recordComponentWriter = firstRecordComponent;
+            while (recordComponentWriter != null) {
+                ++recordComponentCount;
+                recordSize += recordComponentWriter.computeRecordComponentInfoSize();
+                recordComponentWriter = (RecordComponentWriter) recordComponentWriter.delegate;
+            }
+            ++attributesCount;
+            size += 8 + recordSize;
+            symbolTable.addConstantUtf8(Constants.RECORD);
+        }
+        if (firstAttribute != null) {
+            attributesCount += firstAttribute.getAttributeCount();
+            size += firstAttribute.computeAttributesSize(symbolTable);
+        }
+        // IMPORTANT: this must be the last part of the ClassFile size computation, because the previous
+        // statements can add attribute names to the constant pool, thereby changing its size!
+        size += symbolTable.getConstantPoolLength();
+        int constantPoolCount = symbolTable.getConstantPoolCount();
+        if (constantPoolCount > 0xFFFF) {
+            throw new ClassTooLargeException(symbolTable.getClassName(), constantPoolCount);
+        }
+
+        // Second step: allocate a ByteVector of the correct size (in order to avoid any array copy in
+        // dynamic resizes) and fill it with the ClassFile content.
+        ByteVector result = new ByteVector(size);
+        result.putInt(0xCAFEBABE).putInt(version);
+        symbolTable.putConstantPool(result);
+        int mask = (version & 0xFFFF) < Opcodes.V1_5 ? Opcodes.ACC_SYNTHETIC : 0;
+        result.putShort(accessFlags & ~mask).putShort(thisClass).putShort(superClass);
+        result.putShort(interfaceCount);
+        for (int i = 0; i < interfaceCount; ++i) {
+            result.putShort(interfaces[i]);
+        }
+        result.putShort(fieldsCount);
+        fieldWriter = firstField;
+        while (fieldWriter != null) {
+            fieldWriter.putFieldInfo(result);
+            fieldWriter = (FieldWriter) fieldWriter.fv;
+        }
+        result.putShort(methodsCount);
+        boolean hasFrames = false;
+        boolean hasAsmInstructions = false;
+        methodWriter = firstMethod;
+        while (methodWriter != null) {
+            hasFrames |= methodWriter.hasFrames();
+            hasAsmInstructions |= methodWriter.hasAsmInstructions();
+            methodWriter.putMethodInfo(result);
+            methodWriter = (MethodWriter) methodWriter.mv;
+        }
+        // For ease of reference, we use here the same attribute order as in Section 4.7 of the JVMS.
+        result.putShort(attributesCount);
+        if (innerClasses != null) {
+            result
+                    .putShort(symbolTable.addConstantUtf8(Constants.INNER_CLASSES))
+                    .putInt(innerClasses.length + 2)
+                    .putShort(numberOfInnerClasses)
+                    .putByteArray(innerClasses.data, 0, innerClasses.length);
+        }
+        if (enclosingClassIndex != 0) {
+            result
+                    .putShort(symbolTable.addConstantUtf8(Constants.ENCLOSING_METHOD))
+                    .putInt(4)
+                    .putShort(enclosingClassIndex)
+                    .putShort(enclosingMethodIndex);
+        }
+        if ((accessFlags & Opcodes.ACC_SYNTHETIC) != 0 && (version & 0xFFFF) < Opcodes.V1_5) {
+            result.putShort(symbolTable.addConstantUtf8(Constants.SYNTHETIC)).putInt(0);
+        }
+        if (signatureIndex != 0) {
+            result
+                    .putShort(symbolTable.addConstantUtf8(Constants.SIGNATURE))
+                    .putInt(2)
+                    .putShort(signatureIndex);
+        }
+        if (sourceFileIndex != 0) {
+            result
+                    .putShort(symbolTable.addConstantUtf8(Constants.SOURCE_FILE))
+                    .putInt(2)
+                    .putShort(sourceFileIndex);
+        }
+        if (debugExtension != null) {
+            int length = debugExtension.length;
+            result
+                    .putShort(symbolTable.addConstantUtf8(Constants.SOURCE_DEBUG_EXTENSION))
+                    .putInt(length)
+                    .putByteArray(debugExtension.data, 0, length);
+        }
+        if ((accessFlags & Opcodes.ACC_DEPRECATED) != 0) {
+            result.putShort(symbolTable.addConstantUtf8(Constants.DEPRECATED)).putInt(0);
+        }
+        AnnotationWriter.putAnnotations(
+                symbolTable,
+                lastRuntimeVisibleAnnotation,
+                lastRuntimeInvisibleAnnotation,
+                lastRuntimeVisibleTypeAnnotation,
+                lastRuntimeInvisibleTypeAnnotation,
+                result);
+        symbolTable.putBootstrapMethods(result);
+        if (moduleWriter != null) {
+            moduleWriter.putAttributes(result);
+        }
+        if (nestHostClassIndex != 0) {
+            result
+                    .putShort(symbolTable.addConstantUtf8(Constants.NEST_HOST))
+                    .putInt(2)
+                    .putShort(nestHostClassIndex);
+        }
+        if (nestMemberClasses != null) {
+            result
+                    .putShort(symbolTable.addConstantUtf8(Constants.NEST_MEMBERS))
+                    .putInt(nestMemberClasses.length + 2)
+                    .putShort(numberOfNestMemberClasses)
+                    .putByteArray(nestMemberClasses.data, 0, nestMemberClasses.length);
+        }
+        if (permittedSubclasses != null) {
+            result
+                    .putShort(symbolTable.addConstantUtf8(Constants.PERMITTED_SUBCLASSES))
+                    .putInt(permittedSubclasses.length + 2)
+                    .putShort(numberOfPermittedSubclasses)
+                    .putByteArray(permittedSubclasses.data, 0, permittedSubclasses.length);
+        }
+        if ((accessFlags & Opcodes.ACC_RECORD) != 0 || firstRecordComponent != null) {
+            result
+                    .putShort(symbolTable.addConstantUtf8(Constants.RECORD))
+                    .putInt(recordSize + 2)
+                    .putShort(recordComponentCount);
+            RecordComponentWriter recordComponentWriter = firstRecordComponent;
+            while (recordComponentWriter != null) {
+                recordComponentWriter.putRecordComponentInfo(result);
+                recordComponentWriter = (RecordComponentWriter) recordComponentWriter.delegate;
+            }
+        }
+        if (firstAttribute != null) {
+            firstAttribute.putAttributes(symbolTable, result);
+        }
+
+        // Third step: replace the ASM specific instructions, if any.
+        if (hasAsmInstructions) {
+            return replaceAsmInstructions(result.data, hasFrames);
+        } else {
+            return result.data;
+        }
+    }
+
+    /**
+      * Returns the equivalent of the given class file, with the ASM specific instructions replaced
+      * with standard ones. This is done with a ClassReader -&gt; ClassWriter round trip.
+      *
+      * @param classFile a class file containing ASM specific instructions, generated by this
+      *     ClassWriter.
+      * @param hasFrames whether there is at least one stack map frames in 'classFile'.
+      * @return an equivalent of 'classFile', with the ASM specific instructions replaced with standard
+      *     ones.
+      */
+    private byte[] replaceAsmInstructions(final byte[] classFile, final boolean hasFrames) {
+        final Attribute[] attributes = getAttributePrototypes();
+        firstField = null;
+        lastField = null;
+        firstMethod = null;
+        lastMethod = null;
+        lastRuntimeVisibleAnnotation = null;
+        lastRuntimeInvisibleAnnotation = null;
+        lastRuntimeVisibleTypeAnnotation = null;
+        lastRuntimeInvisibleTypeAnnotation = null;
+        moduleWriter = null;
+        nestHostClassIndex = 0;
+        numberOfNestMemberClasses = 0;
+        nestMemberClasses = null;
+        numberOfPermittedSubclasses = 0;
+        permittedSubclasses = null;
+        firstRecordComponent = null;
+        lastRecordComponent = null;
+        firstAttribute = null;
+        compute = hasFrames ? MethodWriter.COMPUTE_INSERTED_FRAMES : MethodWriter.COMPUTE_NOTHING;
+        new ClassReader(classFile, 0, /* checkClassVersion = */ false)
+                .accept(
+                        this,
+                        attributes,
+                        (hasFrames ? ClassReader.EXPAND_FRAMES : 0) | ClassReader.EXPAND_ASM_INSNS);
+        return toByteArray();
+    }
+
+    /**
+      * Returns the prototypes of the attributes used by this class, its fields and its methods.
+      *
+      * @return the prototypes of the attributes used by this class, its fields and its methods.
+      */
+    private Attribute[] getAttributePrototypes() {
+        Attribute.Set attributePrototypes = new Attribute.Set();
+        attributePrototypes.addAttributes(firstAttribute);
+        FieldWriter fieldWriter = firstField;
+        while (fieldWriter != null) {
+            fieldWriter.collectAttributePrototypes(attributePrototypes);
+            fieldWriter = (FieldWriter) fieldWriter.fv;
+        }
+        MethodWriter methodWriter = firstMethod;
+        while (methodWriter != null) {
+            methodWriter.collectAttributePrototypes(attributePrototypes);
+            methodWriter = (MethodWriter) methodWriter.mv;
+        }
+        RecordComponentWriter recordComponentWriter = firstRecordComponent;
+        while (recordComponentWriter != null) {
+            recordComponentWriter.collectAttributePrototypes(attributePrototypes);
+            recordComponentWriter = (RecordComponentWriter) recordComponentWriter.delegate;
+        }
+        return attributePrototypes.toArray();
+    }
+
+    // -----------------------------------------------------------------------------------------------
+    // Utility methods: constant pool management for Attribute sub classes
+    // -----------------------------------------------------------------------------------------------
+
+    /**
+      * Adds a number or string constant to the constant pool of the class being build. Does nothing if
+      * the constant pool already contains a similar item. <i>This method is intended for {@link
+      * Attribute} sub classes, and is normally not needed by class generators or adapters.</i>
+      *
+      * @param value the value of the constant to be added to the constant pool. This parameter must be
+      *     an {@link Integer}, a {@link Float}, a {@link Long}, a {@link Double} or a {@link String}.
+      * @return the index of a new or already existing constant item with the given value.
+      */
+    public int newConst(final Object value) {
+        return symbolTable.addConstant(value).index;
+    }
+
+    /**
+      * Adds an UTF8 string to the constant pool of the class being build. Does nothing if the constant
+      * pool already contains a similar item. <i>This method is intended for {@link Attribute} sub
+      * classes, and is normally not needed by class generators or adapters.</i>
+      *
+      * @param value the String value.
+      * @return the index of a new or already existing UTF8 item.
+      */
+    // DontCheck(AbbreviationAsWordInName): can't be renamed (for backward binary compatibility).
+    public int newUTF8(final String value) {
+        return symbolTable.addConstantUtf8(value);
+    }
+
+    /**
+      * Adds a class reference to the constant pool of the class being build. Does nothing if the
+      * constant pool already contains a similar item. <i>This method is intended for {@link Attribute}
+      * sub classes, and is normally not needed by class generators or adapters.</i>
+      *
+      * @param value the internal name of the class (see {@link Type#getInternalName()}).
+      * @return the index of a new or already existing class reference item.
+      */
+    public int newClass(final String value) {
+        return symbolTable.addConstantClass(value).index;
+    }
+
+    /**
+      * Adds a method type reference to the constant pool of the class being build. Does nothing if the
+      * constant pool already contains a similar item. <i>This method is intended for {@link Attribute}
+      * sub classes, and is normally not needed by class generators or adapters.</i>
+      *
+      * @param methodDescriptor method descriptor of the method type.
+      * @return the index of a new or already existing method type reference item.
+      */
+    public int newMethodType(final String methodDescriptor) {
+        return symbolTable.addConstantMethodType(methodDescriptor).index;
+    }
+
+    /**
+      * Adds a module reference to the constant pool of the class being build. Does nothing if the
+      * constant pool already contains a similar item. <i>This method is intended for {@link Attribute}
+      * sub classes, and is normally not needed by class generators or adapters.</i>
+      *
+      * @param moduleName name of the module.
+      * @return the index of a new or already existing module reference item.
+      */
+    public int newModule(final String moduleName) {
+        return symbolTable.addConstantModule(moduleName).index;
+    }
+
+    /**
+      * Adds a package reference to the constant pool of the class being build. Does nothing if the
+      * constant pool already contains a similar item. <i>This method is intended for {@link Attribute}
+      * sub classes, and is normally not needed by class generators or adapters.</i>
+      *
+      * @param packageName name of the package in its internal form.
+      * @return the index of a new or already existing module reference item.
+      */
+    public int newPackage(final String packageName) {
+        return symbolTable.addConstantPackage(packageName).index;
+    }
+
+    /**
+      * Adds a handle to the constant pool of the class being build. Does nothing if the constant pool
+      * already contains a similar item. <i>This method is intended for {@link Attribute} sub classes,
+      * and is normally not needed by class generators or adapters.</i>
+      *
+      * @param tag the kind of this handle. Must be {@link Opcodes#H_GETFIELD}, {@link
+      *     Opcodes#H_GETSTATIC}, {@link Opcodes#H_PUTFIELD}, {@link Opcodes#H_PUTSTATIC}, {@link
+      *     Opcodes#H_INVOKEVIRTUAL}, {@link Opcodes#H_INVOKESTATIC}, {@link Opcodes#H_INVOKESPECIAL},
+      *     {@link Opcodes#H_NEWINVOKESPECIAL} or {@link Opcodes#H_INVOKEINTERFACE}.
+      * @param owner the internal name of the field or method owner class (see {@link
+      *     Type#getInternalName()}).
+      * @param name the name of the field or method.
+      * @param descriptor the descriptor of the field or method.
+      * @return the index of a new or already existing method type reference item.
+      * @deprecated this method is superseded by {@link #newHandle(int, String, String, String,
+      *     boolean)}.
+      */
+    @Deprecated
+    public int newHandle(
+            final int tag, final String owner, final String name, final String descriptor) {
+        return newHandle(tag, owner, name, descriptor, tag == Opcodes.H_INVOKEINTERFACE);
+    }
+
+    /**
+      * Adds a handle to the constant pool of the class being build. Does nothing if the constant pool
+      * already contains a similar item. <i>This method is intended for {@link Attribute} sub classes,
+      * and is normally not needed by class generators or adapters.</i>
+      *
+      * @param tag the kind of this handle. Must be {@link Opcodes#H_GETFIELD}, {@link
+      *     Opcodes#H_GETSTATIC}, {@link Opcodes#H_PUTFIELD}, {@link Opcodes#H_PUTSTATIC}, {@link
+      *     Opcodes#H_INVOKEVIRTUAL}, {@link Opcodes#H_INVOKESTATIC}, {@link Opcodes#H_INVOKESPECIAL},
+      *     {@link Opcodes#H_NEWINVOKESPECIAL} or {@link Opcodes#H_INVOKEINTERFACE}.
+      * @param owner the internal name of the field or method owner class (see {@link
+      *     Type#getInternalName()}).
+      * @param name the name of the field or method.
+      * @param descriptor the descriptor of the field or method.
+      * @param isInterface true if the owner is an interface.
+      * @return the index of a new or already existing method type reference item.
+      */
+    public int newHandle(
+            final int tag,
+            final String owner,
+            final String name,
+            final String descriptor,
+            final boolean isInterface) {
+        return symbolTable.addConstantMethodHandle(tag, owner, name, descriptor, isInterface).index;
+    }
+
+    /**
+      * Adds a dynamic constant reference to the constant pool of the class being build. Does nothing
+      * if the constant pool already contains a similar item. <i>This method is intended for {@link
+      * Attribute} sub classes, and is normally not needed by class generators or adapters.</i>
+      *
+      * @param name name of the invoked method.
+      * @param descriptor field descriptor of the constant type.
+      * @param bootstrapMethodHandle the bootstrap method.
+      * @param bootstrapMethodArguments the bootstrap method constant arguments.
+      * @return the index of a new or already existing dynamic constant reference item.
+      */
+    public int newConstantDynamic(
+            final String name,
+            final String descriptor,
+            final Handle bootstrapMethodHandle,
+            final Object... bootstrapMethodArguments) {
+        return symbolTable.addConstantDynamic(
+                        name, descriptor, bootstrapMethodHandle, bootstrapMethodArguments)
+                .index;
+    }
+
+    /**
+      * Adds an invokedynamic reference to the constant pool of the class being build. Does nothing if
+      * the constant pool already contains a similar item. <i>This method is intended for {@link
+      * Attribute} sub classes, and is normally not needed by class generators or adapters.</i>
+      *
+      * @param name name of the invoked method.
+      * @param descriptor descriptor of the invoke method.
+      * @param bootstrapMethodHandle the bootstrap method.
+      * @param bootstrapMethodArguments the bootstrap method constant arguments.
+      * @return the index of a new or already existing invokedynamic reference item.
+      */
+    public int newInvokeDynamic(
+            final String name,
+            final String descriptor,
+            final Handle bootstrapMethodHandle,
+            final Object... bootstrapMethodArguments) {
+        return symbolTable.addConstantInvokeDynamic(
+                        name, descriptor, bootstrapMethodHandle, bootstrapMethodArguments)
+                .index;
+    }
+
+    /**
+      * Adds a field reference to the constant pool of the class being build. Does nothing if the
+      * constant pool already contains a similar item. <i>This method is intended for {@link Attribute}
+      * sub classes, and is normally not needed by class generators or adapters.</i>
+      *
+      * @param owner the internal name of the field's owner class (see {@link Type#getInternalName()}).
+      * @param name the field's name.
+      * @param descriptor the field's descriptor.
+      * @return the index of a new or already existing field reference item.
+      */
+    public int newField(final String owner, final String name, final String descriptor) {
+        return symbolTable.addConstantFieldref(owner, name, descriptor).index;
+    }
+
+    /**
+      * Adds a method reference to the constant pool of the class being build. Does nothing if the
+      * constant pool already contains a similar item. <i>This method is intended for {@link Attribute}
+      * sub classes, and is normally not needed by class generators or adapters.</i>
+      *
+      * @param owner the internal name of the method's owner class (see {@link
+      *     Type#getInternalName()}).
+      * @param name the method's name.
+      * @param descriptor the method's descriptor.
+      * @param isInterface {@literal true} if {@code owner} is an interface.
+      * @return the index of a new or already existing method reference item.
+      */
+    public int newMethod(
+            final String owner, final String name, final String descriptor, final boolean isInterface) {
+        return symbolTable.addConstantMethodref(owner, name, descriptor, isInterface).index;
+    }
+
+    /**
+      * Adds a name and type to the constant pool of the class being build. Does nothing if the
+      * constant pool already contains a similar item. <i>This method is intended for {@link Attribute}
+      * sub classes, and is normally not needed by class generators or adapters.</i>
+      *
+      * @param name a name.
+      * @param descriptor a type descriptor.
+      * @return the index of a new or already existing name and type item.
+      */
+    public int newNameType(final String name, final String descriptor) {
+        return symbolTable.addConstantNameAndType(name, descriptor);
+    }
+
+    // -----------------------------------------------------------------------------------------------
+    // Default method to compute common super classes when computing stack map frames
+    // -----------------------------------------------------------------------------------------------
+
+    /**
+      * Returns the common super type of the two given types. The default implementation of this method
+      * <i>loads</i> the two given classes and uses the java.lang.Class methods to find the common
+      * super class. It can be overridden to compute this common super type in other ways, in
+      * particular without actually loading any class, or to take into account the class that is
+      * currently being generated by this ClassWriter, which can of course not be loaded since it is
+      * under construction.
+      *
+      * @param type1 the internal name of a class (see {@link Type#getInternalName()}).
+      * @param type2 the internal name of another class (see {@link Type#getInternalName()}).
+      * @return the internal name of the common super class of the two given classes (see {@link
+      *     Type#getInternalName()}).
+      */
+    protected String getCommonSuperClass(final String type1, final String type2) {
+        ClassLoader classLoader = getClassLoader();
+        Class<?> class1;
+        try {
+            class1 = Class.forName(type1.replace('/', '.'), false, classLoader);
+        } catch (ClassNotFoundException e) {
+            throw new TypeNotPresentException(type1, e);
+        }
+        Class<?> class2;
+        try {
+            class2 = Class.forName(type2.replace('/', '.'), false, classLoader);
+        } catch (ClassNotFoundException e) {
+            throw new TypeNotPresentException(type2, e);
+        }
+        if (class1.isAssignableFrom(class2)) {
+            return type1;
+        }
+        if (class2.isAssignableFrom(class1)) {
+            return type2;
+        }
+        if (class1.isInterface() || class2.isInterface()) {
+            return "java/lang/Object";
+        } else {
+            do {
+                class1 = class1.getSuperclass();
+            } while (!class1.isAssignableFrom(class2));
+            return class1.getName().replace('.', '/');
+        }
+    }
+
+    /**
+      * Returns the {@link ClassLoader} to be used by the default implementation of {@link
+      * #getCommonSuperClass(String, String)}, that of this {@link ClassWriter}'s runtime type by
+      * default.
+      *
+      * @return ClassLoader
+      */
+    protected ClassLoader getClassLoader() {
+        return getClass().getClassLoader();
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/org/objectweb/asm/ConstantDynamic.class b/tests/test_data/std/jdk/internal/org/objectweb/asm/ConstantDynamic.class
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z9de9+T^zS-M2x$gyoZUKySQk3PjtLoLBghxkoqf_u^G%A+=;*y(x~9oTC=oS8Q7;^
U3;)tLY`@O&WYzHsxoScFf4eqHJpcdz

literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/org/objectweb/asm/ConstantDynamic.java b/tests/test_data/std/jdk/internal/org/objectweb/asm/ConstantDynamic.java
new file mode 100644
index 00000000..cb992f83
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/org/objectweb/asm/ConstantDynamic.java
@@ -0,0 +1,210 @@
+/*
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/*
+ * This file is available under and governed by the GNU General Public
+ * License version 2 only, as published by the Free Software Foundation.
+ * However, the following notice accompanied the original version of this
+ * file:
+ *
+ * ASM: a very small and fast Java bytecode manipulation framework
+ * Copyright (c) 2000-2011 INRIA, France Telecom
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the copyright holders nor the names of its
+ *    contributors may be used to endorse or promote products derived from
+ *    this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+package jdk.internal.org.objectweb.asm;
+
+import java.util.Arrays;
+
+/**
+ * A constant whose value is computed at runtime, with a bootstrap method.
+ *
+ * @author Remi Forax
+ */
+public final class ConstantDynamic {
+
+    /** The constant name (can be arbitrary). */
+    private final String name;
+
+    /** The constant type (must be a field descriptor). */
+    private final String descriptor;
+
+    /** The bootstrap method to use to compute the constant value at runtime. */
+    private final Handle bootstrapMethod;
+
+    /**
+      * The arguments to pass to the bootstrap method, in order to compute the constant value at
+      * runtime.
+      */
+    private final Object[] bootstrapMethodArguments;
+
+    /**
+      * Constructs a new {@link ConstantDynamic}.
+      *
+      * @param name the constant name (can be arbitrary).
+      * @param descriptor the constant type (must be a field descriptor).
+      * @param bootstrapMethod the bootstrap method to use to compute the constant value at runtime.
+      * @param bootstrapMethodArguments the arguments to pass to the bootstrap method, in order to
+      *     compute the constant value at runtime.
+      */
+    public ConstantDynamic(
+            final String name,
+            final String descriptor,
+            final Handle bootstrapMethod,
+            final Object... bootstrapMethodArguments) {
+        this.name = name;
+        this.descriptor = descriptor;
+        this.bootstrapMethod = bootstrapMethod;
+        this.bootstrapMethodArguments = bootstrapMethodArguments;
+    }
+
+    /**
+      * Returns the name of this constant.
+      *
+      * @return the name of this constant.
+      */
+    public String getName() {
+        return name;
+    }
+
+    /**
+      * Returns the type of this constant.
+      *
+      * @return the type of this constant, as a field descriptor.
+      */
+    public String getDescriptor() {
+        return descriptor;
+    }
+
+    /**
+      * Returns the bootstrap method used to compute the value of this constant.
+      *
+      * @return the bootstrap method used to compute the value of this constant.
+      */
+    public Handle getBootstrapMethod() {
+        return bootstrapMethod;
+    }
+
+    /**
+      * Returns the number of arguments passed to the bootstrap method, in order to compute the value
+      * of this constant.
+      *
+      * @return the number of arguments passed to the bootstrap method, in order to compute the value
+      *     of this constant.
+      */
+    public int getBootstrapMethodArgumentCount() {
+        return bootstrapMethodArguments.length;
+    }
+
+    /**
+      * Returns an argument passed to the bootstrap method, in order to compute the value of this
+      * constant.
+      *
+      * @param index an argument index, between 0 and {@link #getBootstrapMethodArgumentCount()}
+      *     (exclusive).
+      * @return the argument passed to the bootstrap method, with the given index.
+      */
+    public Object getBootstrapMethodArgument(final int index) {
+        return bootstrapMethodArguments[index];
+    }
+
+    /**
+      * Returns the arguments to pass to the bootstrap method, in order to compute the value of this
+      * constant. WARNING: this array must not be modified, and must not be returned to the user.
+      *
+      * @return the arguments to pass to the bootstrap method, in order to compute the value of this
+      *     constant.
+      */
+    Object[] getBootstrapMethodArgumentsUnsafe() {
+        return bootstrapMethodArguments;
+    }
+
+    /**
+      * Returns the size of this constant.
+      *
+      * @return the size of this constant, i.e., 2 for {@code long} and {@code double}, 1 otherwise.
+      */
+    public int getSize() {
+        char firstCharOfDescriptor = descriptor.charAt(0);
+        return (firstCharOfDescriptor == 'J' || firstCharOfDescriptor == 'D') ? 2 : 1;
+    }
+
+    @Override
+    public boolean equals(final Object object) {
+        if (object == this) {
+            return true;
+        }
+        if (!(object instanceof ConstantDynamic)) {
+            return false;
+        }
+        ConstantDynamic constantDynamic = (ConstantDynamic) object;
+        return name.equals(constantDynamic.name)
+                && descriptor.equals(constantDynamic.descriptor)
+                && bootstrapMethod.equals(constantDynamic.bootstrapMethod)
+                && Arrays.equals(bootstrapMethodArguments, constantDynamic.bootstrapMethodArguments);
+    }
+
+    @Override
+    public int hashCode() {
+        return name.hashCode()
+                ^ Integer.rotateLeft(descriptor.hashCode(), 8)
+                ^ Integer.rotateLeft(bootstrapMethod.hashCode(), 16)
+                ^ Integer.rotateLeft(Arrays.hashCode(bootstrapMethodArguments), 24);
+    }
+
+    @Override
+    public String toString() {
+        return name
+                + " : "
+                + descriptor
+                + ' '
+                + bootstrapMethod
+                + ' '
+                + Arrays.toString(bootstrapMethodArguments);
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/org/objectweb/asm/Constants.class b/tests/test_data/std/jdk/internal/org/objectweb/asm/Constants.class
new file mode 100644
index 0000000000000000000000000000000000000000..eb33346d484ef732d47ae44948bcff103878ae9d
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diff --git a/tests/test_data/std/jdk/internal/org/objectweb/asm/Constants.java b/tests/test_data/std/jdk/internal/org/objectweb/asm/Constants.java
new file mode 100644
index 00000000..0fc081fe
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/org/objectweb/asm/Constants.java
@@ -0,0 +1,253 @@
+/*
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/*
+ * This file is available under and governed by the GNU General Public
+ * License version 2 only, as published by the Free Software Foundation.
+ * However, the following notice accompanied the original version of this
+ * file:
+ *
+ * ASM: a very small and fast Java bytecode manipulation framework
+ * Copyright (c) 2000-2011 INRIA, France Telecom
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the copyright holders nor the names of its
+ *    contributors may be used to endorse or promote products derived from
+ *    this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+package jdk.internal.org.objectweb.asm;
+
+import java.io.DataInputStream;
+import java.io.IOException;
+import java.io.InputStream;
+import java.util.regex.Pattern;
+
+/**
+ * Defines additional JVM opcodes, access flags and constants which are not part of the ASM public
+ * API.
+ *
+ * @see <a href="https://docs.oracle.com/javase/specs/jvms/se11/html/jvms-6.html">JVMS 6</a>
+ * @author Eric Bruneton
+ */
+final class Constants {
+
+    // The ClassFile attribute names, in the order they are defined in
+    // https://docs.oracle.com/javase/specs/jvms/se11/html/jvms-4.html#jvms-4.7-300.
+
+    static final String CONSTANT_VALUE = "ConstantValue";
+    static final String CODE = "Code";
+    static final String STACK_MAP_TABLE = "StackMapTable";
+    static final String EXCEPTIONS = "Exceptions";
+    static final String INNER_CLASSES = "InnerClasses";
+    static final String ENCLOSING_METHOD = "EnclosingMethod";
+    static final String SYNTHETIC = "Synthetic";
+    static final String SIGNATURE = "Signature";
+    static final String SOURCE_FILE = "SourceFile";
+    static final String SOURCE_DEBUG_EXTENSION = "SourceDebugExtension";
+    static final String LINE_NUMBER_TABLE = "LineNumberTable";
+    static final String LOCAL_VARIABLE_TABLE = "LocalVariableTable";
+    static final String LOCAL_VARIABLE_TYPE_TABLE = "LocalVariableTypeTable";
+    static final String DEPRECATED = "Deprecated";
+    static final String RUNTIME_VISIBLE_ANNOTATIONS = "RuntimeVisibleAnnotations";
+    static final String RUNTIME_INVISIBLE_ANNOTATIONS = "RuntimeInvisibleAnnotations";
+    static final String RUNTIME_VISIBLE_PARAMETER_ANNOTATIONS = "RuntimeVisibleParameterAnnotations";
+    static final String RUNTIME_INVISIBLE_PARAMETER_ANNOTATIONS =
+            "RuntimeInvisibleParameterAnnotations";
+    static final String RUNTIME_VISIBLE_TYPE_ANNOTATIONS = "RuntimeVisibleTypeAnnotations";
+    static final String RUNTIME_INVISIBLE_TYPE_ANNOTATIONS = "RuntimeInvisibleTypeAnnotations";
+    static final String ANNOTATION_DEFAULT = "AnnotationDefault";
+    static final String BOOTSTRAP_METHODS = "BootstrapMethods";
+    static final String METHOD_PARAMETERS = "MethodParameters";
+    static final String MODULE = "Module";
+    static final String MODULE_PACKAGES = "ModulePackages";
+    static final String MODULE_MAIN_CLASS = "ModuleMainClass";
+    static final String NEST_HOST = "NestHost";
+    static final String NEST_MEMBERS = "NestMembers";
+    static final String PERMITTED_SUBCLASSES = "PermittedSubclasses";
+    static final String RECORD = "Record";
+
+    // ASM specific access flags.
+    // WARNING: the 16 least significant bits must NOT be used, to avoid conflicts with standard
+    // access flags, and also to make sure that these flags are automatically filtered out when
+    // written in class files (because access flags are stored using 16 bits only).
+
+    static final int ACC_CONSTRUCTOR = 0x40000; // method access flag.
+
+    // ASM specific stack map frame types, used in {@link ClassVisitor#visitFrame}.
+
+    /**
+      * A frame inserted between already existing frames. This internal stack map frame type (in
+      * addition to the ones declared in {@link Opcodes}) can only be used if the frame content can be
+      * computed from the previous existing frame and from the instructions between this existing frame
+      * and the inserted one, without any knowledge of the type hierarchy. This kind of frame is only
+      * used when an unconditional jump is inserted in a method while expanding an ASM specific
+      * instruction. Keep in sync with Opcodes.java.
+      */
+    static final int F_INSERT = 256;
+
+    // The JVM opcode values which are not part of the ASM public API.
+    // See https://docs.oracle.com/javase/specs/jvms/se9/html/jvms-6.html.
+
+    static final int LDC_W = 19;
+    static final int LDC2_W = 20;
+    static final int ILOAD_0 = 26;
+    static final int ILOAD_1 = 27;
+    static final int ILOAD_2 = 28;
+    static final int ILOAD_3 = 29;
+    static final int LLOAD_0 = 30;
+    static final int LLOAD_1 = 31;
+    static final int LLOAD_2 = 32;
+    static final int LLOAD_3 = 33;
+    static final int FLOAD_0 = 34;
+    static final int FLOAD_1 = 35;
+    static final int FLOAD_2 = 36;
+    static final int FLOAD_3 = 37;
+    static final int DLOAD_0 = 38;
+    static final int DLOAD_1 = 39;
+    static final int DLOAD_2 = 40;
+    static final int DLOAD_3 = 41;
+    static final int ALOAD_0 = 42;
+    static final int ALOAD_1 = 43;
+    static final int ALOAD_2 = 44;
+    static final int ALOAD_3 = 45;
+    static final int ISTORE_0 = 59;
+    static final int ISTORE_1 = 60;
+    static final int ISTORE_2 = 61;
+    static final int ISTORE_3 = 62;
+    static final int LSTORE_0 = 63;
+    static final int LSTORE_1 = 64;
+    static final int LSTORE_2 = 65;
+    static final int LSTORE_3 = 66;
+    static final int FSTORE_0 = 67;
+    static final int FSTORE_1 = 68;
+    static final int FSTORE_2 = 69;
+    static final int FSTORE_3 = 70;
+    static final int DSTORE_0 = 71;
+    static final int DSTORE_1 = 72;
+    static final int DSTORE_2 = 73;
+    static final int DSTORE_3 = 74;
+    static final int ASTORE_0 = 75;
+    static final int ASTORE_1 = 76;
+    static final int ASTORE_2 = 77;
+    static final int ASTORE_3 = 78;
+    static final int WIDE = 196;
+    static final int GOTO_W = 200;
+    static final int JSR_W = 201;
+
+    // Constants to convert between normal and wide jump instructions.
+
+    // The delta between the GOTO_W and JSR_W opcodes and GOTO and JUMP.
+    static final int WIDE_JUMP_OPCODE_DELTA = GOTO_W - Opcodes.GOTO;
+
+    // Constants to convert JVM opcodes to the equivalent ASM specific opcodes, and vice versa.
+
+    // The delta between the ASM_IFEQ, ..., ASM_IF_ACMPNE, ASM_GOTO and ASM_JSR opcodes
+    // and IFEQ, ..., IF_ACMPNE, GOTO and JSR.
+    static final int ASM_OPCODE_DELTA = 49;
+
+    // The delta between the ASM_IFNULL and ASM_IFNONNULL opcodes and IFNULL and IFNONNULL.
+    static final int ASM_IFNULL_OPCODE_DELTA = 20;
+
+    // ASM specific opcodes, used for long forward jump instructions.
+
+    static final int ASM_IFEQ = Opcodes.IFEQ + ASM_OPCODE_DELTA;
+    static final int ASM_IFNE = Opcodes.IFNE + ASM_OPCODE_DELTA;
+    static final int ASM_IFLT = Opcodes.IFLT + ASM_OPCODE_DELTA;
+    static final int ASM_IFGE = Opcodes.IFGE + ASM_OPCODE_DELTA;
+    static final int ASM_IFGT = Opcodes.IFGT + ASM_OPCODE_DELTA;
+    static final int ASM_IFLE = Opcodes.IFLE + ASM_OPCODE_DELTA;
+    static final int ASM_IF_ICMPEQ = Opcodes.IF_ICMPEQ + ASM_OPCODE_DELTA;
+    static final int ASM_IF_ICMPNE = Opcodes.IF_ICMPNE + ASM_OPCODE_DELTA;
+    static final int ASM_IF_ICMPLT = Opcodes.IF_ICMPLT + ASM_OPCODE_DELTA;
+    static final int ASM_IF_ICMPGE = Opcodes.IF_ICMPGE + ASM_OPCODE_DELTA;
+    static final int ASM_IF_ICMPGT = Opcodes.IF_ICMPGT + ASM_OPCODE_DELTA;
+    static final int ASM_IF_ICMPLE = Opcodes.IF_ICMPLE + ASM_OPCODE_DELTA;
+    static final int ASM_IF_ACMPEQ = Opcodes.IF_ACMPEQ + ASM_OPCODE_DELTA;
+    static final int ASM_IF_ACMPNE = Opcodes.IF_ACMPNE + ASM_OPCODE_DELTA;
+    static final int ASM_GOTO = Opcodes.GOTO + ASM_OPCODE_DELTA;
+    static final int ASM_JSR = Opcodes.JSR + ASM_OPCODE_DELTA;
+    static final int ASM_IFNULL = Opcodes.IFNULL + ASM_IFNULL_OPCODE_DELTA;
+    static final int ASM_IFNONNULL = Opcodes.IFNONNULL + ASM_IFNULL_OPCODE_DELTA;
+    static final int ASM_GOTO_W = 220;
+
+    private Constants() {}
+
+    static void checkAsmExperimental(final Object caller) {
+        Class<?> callerClass = caller.getClass();
+        String internalName = callerClass.getName().replace('.', '/');
+        if (!isWhitelisted(internalName)) {
+            checkIsPreview(callerClass.getClassLoader().getResourceAsStream(internalName + ".class"));
+        }
+    }
+
+    static boolean isWhitelisted(final String internalName) {
+        if (!internalName.startsWith("jdk/internal/org/objectweb/asm/")) {
+            return false;
+        }
+        String member = "(Annotation|Class|Field|Method|Module|RecordComponent|Signature)";
+        return internalName.contains("Test$")
+                || Pattern.matches(
+                        "jdk/internal/org/objectweb/asm/util/Trace" + member + "Visitor(\\$.*)?", internalName)
+                || Pattern.matches(
+                        "jdk/internal/org/objectweb/asm/util/Check" + member + "Adapter(\\$.*)?", internalName);
+    }
+
+    static void checkIsPreview(final InputStream classInputStream) {
+        if (classInputStream == null) {
+            throw new IllegalStateException("Bytecode not available, can't check class version");
+        }
+        int minorVersion;
+        try (DataInputStream callerClassStream = new DataInputStream(classInputStream); ) {
+            callerClassStream.readInt();
+            minorVersion = callerClassStream.readUnsignedShort();
+        } catch (IOException ioe) {
+            throw new IllegalStateException("I/O error, can't check class version", ioe);
+        }
+        if (minorVersion != 0xFFFF) {
+            throw new IllegalStateException(
+                    "ASM9_EXPERIMENTAL can only be used by classes compiled with --enable-preview");
+        }
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/org/objectweb/asm/Context.class b/tests/test_data/std/jdk/internal/org/objectweb/asm/Context.class
new file mode 100644
index 0000000000000000000000000000000000000000..c2754c3b09cd0644ab7949f92e8be808f7ab90b2
GIT binary patch
literal 1161
zcma)6&2G~`5S~p#10l3&3~ix63oUJuN|-wcDY!(cWSWXZz4WxUH_oQcZnR$W^H`ja
zIPd^G6k>MSstF*{gLgbL-+c48_K%<6z5_r2hgB%SQU%I2xB<%q>SOwW`WY3e-;2g9
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zTI$bJmJ>KU4;K)0F2i0DSea6lbCLF@noEJ<<d{G;9#QqC7!H{tP&y9?Y{rFBOz3w^
zk7Uw`W0vRLjHVc{Hs?B_6GosBUNzds8byk!Hs*jwERPkRYKbYlIZsF<mLc)M!bU6-
znYUd004LB9LTYN78Bmon9MkrHyr)!;2(%VW%n%zW=4v^%P{uSnql(ign@Rc}cgy;k
zDs4Kr2KKE;5ZS&4@>nDs=WaHFJ8HOyuEL4;hQr*nTAwwVq6w_enrzX5ECgaNhh_<`
z97inE^j~3y4wHMhl|L>qPGv3&wjW=(EPp#3PdShYmbV&m!A^=v#MHn{(%hZd$vR_M
zk2of8E?SiPHn5^<UluB6U2ZsQ&i>q#4lkgBpCy2Y&n>9p32+-~R^EXXD_5Ofhc&A=
zob=$X)$cj~I&4^d)7kGk`2e=8{h`A>a`Lg0+fMGl6N`K5^j)hHwBZi}2<+jTkJ4J&
gUx9o<LkXVYY24-~vyW%(HvkTxi5lKgJWJ621>0~#dH?_b

literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/org/objectweb/asm/Context.java b/tests/test_data/std/jdk/internal/org/objectweb/asm/Context.java
new file mode 100644
index 00000000..bec67f53
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/org/objectweb/asm/Context.java
@@ -0,0 +1,168 @@
+/*
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/*
+ * This file is available under and governed by the GNU General Public
+ * License version 2 only, as published by the Free Software Foundation.
+ * However, the following notice accompanied the original version of this
+ * file:
+ *
+ * ASM: a very small and fast Java bytecode manipulation framework
+ * Copyright (c) 2000-2011 INRIA, France Telecom
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the copyright holders nor the names of its
+ *    contributors may be used to endorse or promote products derived from
+ *    this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+package jdk.internal.org.objectweb.asm;
+
+/**
+ * Information about a class being parsed in a {@link ClassReader}.
+ *
+ * @author Eric Bruneton
+ */
+final class Context {
+
+    /** The prototypes of the attributes that must be parsed in this class. */
+    Attribute[] attributePrototypes;
+
+    /**
+      * The options used to parse this class. One or more of {@link ClassReader#SKIP_CODE}, {@link
+      * ClassReader#SKIP_DEBUG}, {@link ClassReader#SKIP_FRAMES}, {@link ClassReader#EXPAND_FRAMES} or
+      * {@link ClassReader#EXPAND_ASM_INSNS}.
+      */
+    int parsingOptions;
+
+    /** The buffer used to read strings in the constant pool. */
+    char[] charBuffer;
+
+    // Information about the current method, i.e. the one read in the current (or latest) call
+    // to {@link ClassReader#readMethod()}.
+
+    /** The access flags of the current method. */
+    int currentMethodAccessFlags;
+
+    /** The name of the current method. */
+    String currentMethodName;
+
+    /** The descriptor of the current method. */
+    String currentMethodDescriptor;
+
+    /**
+      * The labels of the current method, indexed by bytecode offset (only bytecode offsets for which a
+      * label is needed have a non null associated Label).
+      */
+    Label[] currentMethodLabels;
+
+    // Information about the current type annotation target, i.e. the one read in the current
+    // (or latest) call to {@link ClassReader#readAnnotationTarget()}.
+
+    /**
+      * The target_type and target_info of the current type annotation target, encoded as described in
+      * {@link TypeReference}.
+      */
+    int currentTypeAnnotationTarget;
+
+    /** The target_path of the current type annotation target. */
+    TypePath currentTypeAnnotationTargetPath;
+
+    /** The start of each local variable range in the current local variable annotation. */
+    Label[] currentLocalVariableAnnotationRangeStarts;
+
+    /** The end of each local variable range in the current local variable annotation. */
+    Label[] currentLocalVariableAnnotationRangeEnds;
+
+    /**
+      * The local variable index of each local variable range in the current local variable annotation.
+      */
+    int[] currentLocalVariableAnnotationRangeIndices;
+
+    // Information about the current stack map frame, i.e. the one read in the current (or latest)
+    // call to {@link ClassReader#readFrame()}.
+
+    /** The bytecode offset of the current stack map frame. */
+    int currentFrameOffset;
+
+    /**
+      * The type of the current stack map frame. One of {@link Opcodes#F_FULL}, {@link
+      * Opcodes#F_APPEND}, {@link Opcodes#F_CHOP}, {@link Opcodes#F_SAME} or {@link Opcodes#F_SAME1}.
+      */
+    int currentFrameType;
+
+    /**
+      * The number of local variable types in the current stack map frame. Each type is represented
+      * with a single array element (even long and double).
+      */
+    int currentFrameLocalCount;
+
+    /**
+      * The delta number of local variable types in the current stack map frame (each type is
+      * represented with a single array element - even long and double). This is the number of local
+      * variable types in this frame, minus the number of local variable types in the previous frame.
+      */
+    int currentFrameLocalCountDelta;
+
+    /**
+      * The types of the local variables in the current stack map frame. Each type is represented with
+      * a single array element (even long and double), using the format described in {@link
+      * MethodVisitor#visitFrame}. Depending on {@link #currentFrameType}, this contains the types of
+      * all the local variables, or only those of the additional ones (compared to the previous frame).
+      */
+    Object[] currentFrameLocalTypes;
+
+    /**
+      * The number stack element types in the current stack map frame. Each type is represented with a
+      * single array element (even long and double).
+      */
+    int currentFrameStackCount;
+
+    /**
+      * The types of the stack elements in the current stack map frame. Each type is represented with a
+      * single array element (even long and double), using the format described in {@link
+      * MethodVisitor#visitFrame}.
+      */
+    Object[] currentFrameStackTypes;
+}
diff --git a/tests/test_data/std/jdk/internal/org/objectweb/asm/CurrentFrame.class b/tests/test_data/std/jdk/internal/org/objectweb/asm/CurrentFrame.class
new file mode 100644
index 0000000000000000000000000000000000000000..4a875802623a708333d2586a56962b4c4f2b00a8
GIT binary patch
literal 1073
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zchrJ~4GY(CgJH#&Cud_Nqh)GYAoN@YV<eAB;QBO(#hWbhgvvEAY)qxkLzk;S7ov0;
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zKUprX=z^xqd|xDqTt<3PQij${X37`iAf&RkFBjtJf`8$7Mm?+1${;^!SHN(SZbQ0j
zf1|&D0rowA@6f5o9e71s^%}Rx>J(A9jV|3N9(S-w7|<J0Vtvy)NFKYtxpmMrF3|jm
z+DAsX&&__<=$iF&tiA7d&2zN>Gj%8ncuP1l8mU9v#XCHLo3joJynn1Vw&-26+PFuS
c)@b8C9-y9E+jt0rP}+oG6E4GJ^4GBQ7dw6!djJ3c

literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/org/objectweb/asm/CurrentFrame.java b/tests/test_data/std/jdk/internal/org/objectweb/asm/CurrentFrame.java
new file mode 100644
index 00000000..580b9a95
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/org/objectweb/asm/CurrentFrame.java
@@ -0,0 +1,87 @@
+/*
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/*
+ * This file is available under and governed by the GNU General Public
+ * License version 2 only, as published by the Free Software Foundation.
+ * However, the following notice accompanied the original version of this
+ * file:
+ *
+ * ASM: a very small and fast Java bytecode manipulation framework
+ * Copyright (c) 2000-2011 INRIA, France Telecom
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the copyright holders nor the names of its
+ *    contributors may be used to endorse or promote products derived from
+ *    this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+package jdk.internal.org.objectweb.asm;
+
+/**
+ * Information about the input stack map frame at the "current" instruction of a method. This is
+ * implemented as a Frame subclass for a "basic block" containing only one instruction.
+ *
+ * @author Eric Bruneton
+ */
+final class CurrentFrame extends Frame {
+
+    CurrentFrame(final Label owner) {
+        super(owner);
+    }
+
+    /**
+      * Sets this CurrentFrame to the input stack map frame of the next "current" instruction, i.e. the
+      * instruction just after the given one. It is assumed that the value of this object when this
+      * method is called is the stack map frame status just before the given instruction is executed.
+      */
+    @Override
+    void execute(
+            final int opcode, final int arg, final Symbol symbolArg, final SymbolTable symbolTable) {
+        super.execute(opcode, arg, symbolArg, symbolTable);
+        Frame successor = new Frame(null);
+        merge(symbolTable, successor, 0);
+        copyFrom(successor);
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/org/objectweb/asm/Edge.class b/tests/test_data/std/jdk/internal/org/objectweb/asm/Edge.class
new file mode 100644
index 0000000000000000000000000000000000000000..449ab00e94888f08502ea981127fe5217c0afa63
GIT binary patch
literal 648
zcmah`%TB^T6g|^|P^^NAPkhE`uu<z?<Az{@K_O9z+i4lGSf)u^d~N(D7sSMcAK*uc
zcZv&lEIPO6_MUTY&wT%UegUXpD+djF1}PJ1OfVF>{E^!}mmRy|bcGu;Oq_Vqi%%K!
z@?Oh87Dfg+6O%9*w!7^I+mo>fCHL(h?ASrVdJ>M!qn=%DcLYPqlXn3Ft10%hi98An
zM$~s*5k*1Buv;IaQ|FHGj}?8^#2ktYSt*|5k^Ig$wi-L8HO_A?nhaBwKt?f_af|zX
zp;HW?ZK}7GYV*3*xYXZ<!y!YXTpK4lT58->V!qcR`%2KJF!FUzipze_5#cp=eCo{B
z1DE?P9(oG@HB<4u7cu0nf_~_VGfxc~O6ySF5RNDcjW$nX3G*=N4;Bb%SR}mk4=<yj
zZi>DYRP0ot@}rZ{lg0|w621AvO;IgcA7EB#fQ+?2z?5|`z|1@KHLTLPKn&oKCZAy7
l8Pj+nwO6cB*BbG$o~V;j;;USWiL=_an0V{txj{(7<}dg{jSm0-

literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/org/objectweb/asm/Edge.java b/tests/test_data/std/jdk/internal/org/objectweb/asm/Edge.java
new file mode 100644
index 00000000..59a7ee83
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/org/objectweb/asm/Edge.java
@@ -0,0 +1,123 @@
+/*
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/*
+ * This file is available under and governed by the GNU General Public
+ * License version 2 only, as published by the Free Software Foundation.
+ * However, the following notice accompanied the original version of this
+ * file:
+ *
+ * ASM: a very small and fast Java bytecode manipulation framework
+ * Copyright (c) 2000-2011 INRIA, France Telecom
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the copyright holders nor the names of its
+ *    contributors may be used to endorse or promote products derived from
+ *    this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+package jdk.internal.org.objectweb.asm;
+
+/**
+ * An edge in the control flow graph of a method. Each node of this graph is a basic block,
+ * represented with the Label corresponding to its first instruction. Each edge goes from one node
+ * to another, i.e. from one basic block to another (called the predecessor and successor blocks,
+ * respectively). An edge corresponds either to a jump or ret instruction or to an exception
+ * handler.
+ *
+ * @see Label
+ * @author Eric Bruneton
+ */
+final class Edge {
+
+    /**
+      * A control flow graph edge corresponding to a jump or ret instruction. Only used with {@link
+      * ClassWriter#COMPUTE_FRAMES}.
+      */
+    static final int JUMP = 0;
+
+    /**
+      * A control flow graph edge corresponding to an exception handler. Only used with {@link
+      * ClassWriter#COMPUTE_MAXS}.
+      */
+    static final int EXCEPTION = 0x7FFFFFFF;
+
+    /**
+      * Information about this control flow graph edge.
+      *
+      * <ul>
+      *   <li>If {@link ClassWriter#COMPUTE_MAXS} is used, this field contains either a stack size
+      *       delta (for an edge corresponding to a jump instruction), or the value EXCEPTION (for an
+      *       edge corresponding to an exception handler). The stack size delta is the stack size just
+      *       after the jump instruction, minus the stack size at the beginning of the predecessor
+      *       basic block, i.e. the one containing the jump instruction.
+      *   <li>If {@link ClassWriter#COMPUTE_FRAMES} is used, this field contains either the value JUMP
+      *       (for an edge corresponding to a jump instruction), or the index, in the {@link
+      *       ClassWriter} type table, of the exception type that is handled (for an edge corresponding
+      *       to an exception handler).
+      * </ul>
+      */
+    final int info;
+
+    /** The successor block of this control flow graph edge. */
+    final Label successor;
+
+    /**
+      * The next edge in the list of outgoing edges of a basic block. See {@link Label#outgoingEdges}.
+      */
+    Edge nextEdge;
+
+    /**
+      * Constructs a new Edge.
+      *
+      * @param info see {@link #info}.
+      * @param successor see {@link #successor}.
+      * @param nextEdge see {@link #nextEdge}.
+      */
+    Edge(final int info, final Label successor, final Edge nextEdge) {
+        this.info = info;
+        this.successor = successor;
+        this.nextEdge = nextEdge;
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/org/objectweb/asm/FieldVisitor.class b/tests/test_data/std/jdk/internal/org/objectweb/asm/FieldVisitor.class
new file mode 100644
index 0000000000000000000000000000000000000000..b06e5c175e9cf360635f3a96553dde0c25fdc6d6
GIT binary patch
literal 2227
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/org/objectweb/asm/FieldVisitor.java b/tests/test_data/std/jdk/internal/org/objectweb/asm/FieldVisitor.java
new file mode 100644
index 00000000..7d29f3d4
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/org/objectweb/asm/FieldVisitor.java
@@ -0,0 +1,179 @@
+/*
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/*
+ * This file is available under and governed by the GNU General Public
+ * License version 2 only, as published by the Free Software Foundation.
+ * However, the following notice accompanied the original version of this
+ * file:
+ *
+ * ASM: a very small and fast Java bytecode manipulation framework
+ * Copyright (c) 2000-2011 INRIA, France Telecom
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the copyright holders nor the names of its
+ *    contributors may be used to endorse or promote products derived from
+ *    this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+package jdk.internal.org.objectweb.asm;
+
+/**
+ * A visitor to visit a Java field. The methods of this class must be called in the following order:
+ * ( {@code visitAnnotation} | {@code visitTypeAnnotation} | {@code visitAttribute} )* {@code
+ * visitEnd}.
+ *
+ * @author Eric Bruneton
+ */
+public abstract class FieldVisitor {
+
+    /**
+      * The ASM API version implemented by this visitor. The value of this field must be one of the
+      * {@code ASM}<i>x</i> values in {@link Opcodes}.
+      */
+    protected final int api;
+
+    /** The field visitor to which this visitor must delegate method calls. May be {@literal null}. */
+    protected FieldVisitor fv;
+
+    /**
+      * Constructs a new {@link FieldVisitor}.
+      *
+      * @param api the ASM API version implemented by this visitor. Must be one of the {@code
+      *     ASM}<i>x</i> values in {@link Opcodes}.
+      */
+    protected FieldVisitor(final int api) {
+        this(api, null);
+    }
+
+    /**
+      * Constructs a new {@link FieldVisitor}.
+      *
+      * @param api the ASM API version implemented by this visitor. Must be one of the {@code
+      *     ASM}<i>x</i> values in {@link Opcodes}.
+      * @param fieldVisitor the field visitor to which this visitor must delegate method calls. May be
+      *     null.
+      */
+    protected FieldVisitor(final int api, final FieldVisitor fieldVisitor) {
+        if (api != Opcodes.ASM9
+                && api != Opcodes.ASM8
+                && api != Opcodes.ASM7
+                && api != Opcodes.ASM6
+                && api != Opcodes.ASM5
+                && api != Opcodes.ASM4) {
+            throw new IllegalArgumentException("Unsupported api " + api);
+        }
+        this.api = api;
+        this.fv = fieldVisitor;
+    }
+
+    /**
+      * The field visitor to which this visitor must delegate method calls. May be {@literal null}.
+      *
+      * @return the field visitor to which this visitor must delegate method calls, or {@literal null}.
+      */
+    public FieldVisitor getDelegate() {
+        return fv;
+    }
+
+    /**
+      * Visits an annotation of the field.
+      *
+      * @param descriptor the class descriptor of the annotation class.
+      * @param visible {@literal true} if the annotation is visible at runtime.
+      * @return a visitor to visit the annotation values, or {@literal null} if this visitor is not
+      *     interested in visiting this annotation.
+      */
+    public AnnotationVisitor visitAnnotation(final String descriptor, final boolean visible) {
+        if (fv != null) {
+            return fv.visitAnnotation(descriptor, visible);
+        }
+        return null;
+    }
+
+    /**
+      * Visits an annotation on the type of the field.
+      *
+      * @param typeRef a reference to the annotated type. The sort of this type reference must be
+      *     {@link TypeReference#FIELD}. See {@link TypeReference}.
+      * @param typePath the path to the annotated type argument, wildcard bound, array element type, or
+      *     static inner type within 'typeRef'. May be {@literal null} if the annotation targets
+      *     'typeRef' as a whole.
+      * @param descriptor the class descriptor of the annotation class.
+      * @param visible {@literal true} if the annotation is visible at runtime.
+      * @return a visitor to visit the annotation values, or {@literal null} if this visitor is not
+      *     interested in visiting this annotation.
+      */
+    public AnnotationVisitor visitTypeAnnotation(
+            final int typeRef, final TypePath typePath, final String descriptor, final boolean visible) {
+        if (api < Opcodes.ASM5) {
+            throw new UnsupportedOperationException("This feature requires ASM5");
+        }
+        if (fv != null) {
+            return fv.visitTypeAnnotation(typeRef, typePath, descriptor, visible);
+        }
+        return null;
+    }
+
+    /**
+      * Visits a non standard attribute of the field.
+      *
+      * @param attribute an attribute.
+      */
+    public void visitAttribute(final Attribute attribute) {
+        if (fv != null) {
+            fv.visitAttribute(attribute);
+        }
+    }
+
+    /**
+      * Visits the end of the field. This method, which is the last one to be called, is used to inform
+      * the visitor that all the annotations and attributes of the field have been visited.
+      */
+    public void visitEnd() {
+        if (fv != null) {
+            fv.visitEnd();
+        }
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/org/objectweb/asm/FieldWriter.class b/tests/test_data/std/jdk/internal/org/objectweb/asm/FieldWriter.class
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/org/objectweb/asm/FieldWriter.java b/tests/test_data/std/jdk/internal/org/objectweb/asm/FieldWriter.java
new file mode 100644
index 00000000..c3e78d04
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/org/objectweb/asm/FieldWriter.java
@@ -0,0 +1,316 @@
+/*
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/*
+ * This file is available under and governed by the GNU General Public
+ * License version 2 only, as published by the Free Software Foundation.
+ * However, the following notice accompanied the original version of this
+ * file:
+ *
+ * ASM: a very small and fast Java bytecode manipulation framework
+ * Copyright (c) 2000-2011 INRIA, France Telecom
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the copyright holders nor the names of its
+ *    contributors may be used to endorse or promote products derived from
+ *    this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+package jdk.internal.org.objectweb.asm;
+
+/**
+ * A {@link FieldVisitor} that generates a corresponding 'field_info' structure, as defined in the
+ * Java Virtual Machine Specification (JVMS).
+ *
+ * @see <a href="https://docs.oracle.com/javase/specs/jvms/se9/html/jvms-4.html#jvms-4.5">JVMS
+ *     4.5</a>
+ * @author Eric Bruneton
+ */
+final class FieldWriter extends FieldVisitor {
+
+    /** Where the constants used in this FieldWriter must be stored. */
+    private final SymbolTable symbolTable;
+
+    // Note: fields are ordered as in the field_info structure, and those related to attributes are
+    // ordered as in Section 4.7 of the JVMS.
+
+    /**
+      * The access_flags field of the field_info JVMS structure. This field can contain ASM specific
+      * access flags, such as {@link Opcodes#ACC_DEPRECATED}, which are removed when generating the
+      * ClassFile structure.
+      */
+    private final int accessFlags;
+
+    /** The name_index field of the field_info JVMS structure. */
+    private final int nameIndex;
+
+    /** The descriptor_index field of the field_info JVMS structure. */
+    private final int descriptorIndex;
+
+    /**
+      * The signature_index field of the Signature attribute of this field_info, or 0 if there is no
+      * Signature attribute.
+      */
+    private int signatureIndex;
+
+    /**
+      * The constantvalue_index field of the ConstantValue attribute of this field_info, or 0 if there
+      * is no ConstantValue attribute.
+      */
+    private int constantValueIndex;
+
+    /**
+      * The last runtime visible annotation of this field. The previous ones can be accessed with the
+      * {@link AnnotationWriter#previousAnnotation} field. May be {@literal null}.
+      */
+    private AnnotationWriter lastRuntimeVisibleAnnotation;
+
+    /**
+      * The last runtime invisible annotation of this field. The previous ones can be accessed with the
+      * {@link AnnotationWriter#previousAnnotation} field. May be {@literal null}.
+      */
+    private AnnotationWriter lastRuntimeInvisibleAnnotation;
+
+    /**
+      * The last runtime visible type annotation of this field. The previous ones can be accessed with
+      * the {@link AnnotationWriter#previousAnnotation} field. May be {@literal null}.
+      */
+    private AnnotationWriter lastRuntimeVisibleTypeAnnotation;
+
+    /**
+      * The last runtime invisible type annotation of this field. The previous ones can be accessed
+      * with the {@link AnnotationWriter#previousAnnotation} field. May be {@literal null}.
+      */
+    private AnnotationWriter lastRuntimeInvisibleTypeAnnotation;
+
+    /**
+      * The first non standard attribute of this field. The next ones can be accessed with the {@link
+      * Attribute#nextAttribute} field. May be {@literal null}.
+      *
+      * <p><b>WARNING</b>: this list stores the attributes in the <i>reverse</i> order of their visit.
+      * firstAttribute is actually the last attribute visited in {@link #visitAttribute}. The {@link
+      * #putFieldInfo} method writes the attributes in the order defined by this list, i.e. in the
+      * reverse order specified by the user.
+      */
+    private Attribute firstAttribute;
+
+    // -----------------------------------------------------------------------------------------------
+    // Constructor
+    // -----------------------------------------------------------------------------------------------
+
+    /**
+      * Constructs a new {@link FieldWriter}.
+      *
+      * @param symbolTable where the constants used in this FieldWriter must be stored.
+      * @param access the field's access flags (see {@link Opcodes}).
+      * @param name the field's name.
+      * @param descriptor the field's descriptor (see {@link Type}).
+      * @param signature the field's signature. May be {@literal null}.
+      * @param constantValue the field's constant value. May be {@literal null}.
+      */
+    FieldWriter(
+            final SymbolTable symbolTable,
+            final int access,
+            final String name,
+            final String descriptor,
+            final String signature,
+            final Object constantValue) {
+        super(/* latest api = */ Opcodes.ASM9);
+        this.symbolTable = symbolTable;
+        this.accessFlags = access;
+        this.nameIndex = symbolTable.addConstantUtf8(name);
+        this.descriptorIndex = symbolTable.addConstantUtf8(descriptor);
+        if (signature != null) {
+            this.signatureIndex = symbolTable.addConstantUtf8(signature);
+        }
+        if (constantValue != null) {
+            this.constantValueIndex = symbolTable.addConstant(constantValue).index;
+        }
+    }
+
+    // -----------------------------------------------------------------------------------------------
+    // Implementation of the FieldVisitor abstract class
+    // -----------------------------------------------------------------------------------------------
+
+    @Override
+    public AnnotationVisitor visitAnnotation(final String descriptor, final boolean visible) {
+        if (visible) {
+            return lastRuntimeVisibleAnnotation =
+                    AnnotationWriter.create(symbolTable, descriptor, lastRuntimeVisibleAnnotation);
+        } else {
+            return lastRuntimeInvisibleAnnotation =
+                    AnnotationWriter.create(symbolTable, descriptor, lastRuntimeInvisibleAnnotation);
+        }
+    }
+
+    @Override
+    public AnnotationVisitor visitTypeAnnotation(
+            final int typeRef, final TypePath typePath, final String descriptor, final boolean visible) {
+        if (visible) {
+            return lastRuntimeVisibleTypeAnnotation =
+                    AnnotationWriter.create(
+                            symbolTable, typeRef, typePath, descriptor, lastRuntimeVisibleTypeAnnotation);
+        } else {
+            return lastRuntimeInvisibleTypeAnnotation =
+                    AnnotationWriter.create(
+                            symbolTable, typeRef, typePath, descriptor, lastRuntimeInvisibleTypeAnnotation);
+        }
+    }
+
+    @Override
+    public void visitAttribute(final Attribute attribute) {
+        // Store the attributes in the <i>reverse</i> order of their visit by this method.
+        attribute.nextAttribute = firstAttribute;
+        firstAttribute = attribute;
+    }
+
+    @Override
+    public void visitEnd() {
+        // Nothing to do.
+    }
+
+    // -----------------------------------------------------------------------------------------------
+    // Utility methods
+    // -----------------------------------------------------------------------------------------------
+
+    /**
+      * Returns the size of the field_info JVMS structure generated by this FieldWriter. Also adds the
+      * names of the attributes of this field in the constant pool.
+      *
+      * @return the size in bytes of the field_info JVMS structure.
+      */
+    int computeFieldInfoSize() {
+        // The access_flags, name_index, descriptor_index and attributes_count fields use 8 bytes.
+        int size = 8;
+        // For ease of reference, we use here the same attribute order as in Section 4.7 of the JVMS.
+        if (constantValueIndex != 0) {
+            // ConstantValue attributes always use 8 bytes.
+            symbolTable.addConstantUtf8(Constants.CONSTANT_VALUE);
+            size += 8;
+        }
+        size += Attribute.computeAttributesSize(symbolTable, accessFlags, signatureIndex);
+        size +=
+                AnnotationWriter.computeAnnotationsSize(
+                        lastRuntimeVisibleAnnotation,
+                        lastRuntimeInvisibleAnnotation,
+                        lastRuntimeVisibleTypeAnnotation,
+                        lastRuntimeInvisibleTypeAnnotation);
+        if (firstAttribute != null) {
+            size += firstAttribute.computeAttributesSize(symbolTable);
+        }
+        return size;
+    }
+
+    /**
+      * Puts the content of the field_info JVMS structure generated by this FieldWriter into the given
+      * ByteVector.
+      *
+      * @param output where the field_info structure must be put.
+      */
+    void putFieldInfo(final ByteVector output) {
+        boolean useSyntheticAttribute = symbolTable.getMajorVersion() < Opcodes.V1_5;
+        // Put the access_flags, name_index and descriptor_index fields.
+        int mask = useSyntheticAttribute ? Opcodes.ACC_SYNTHETIC : 0;
+        output.putShort(accessFlags & ~mask).putShort(nameIndex).putShort(descriptorIndex);
+        // Compute and put the attributes_count field.
+        // For ease of reference, we use here the same attribute order as in Section 4.7 of the JVMS.
+        int attributesCount = 0;
+        if (constantValueIndex != 0) {
+            ++attributesCount;
+        }
+        if ((accessFlags & Opcodes.ACC_SYNTHETIC) != 0 && useSyntheticAttribute) {
+            ++attributesCount;
+        }
+        if (signatureIndex != 0) {
+            ++attributesCount;
+        }
+        if ((accessFlags & Opcodes.ACC_DEPRECATED) != 0) {
+            ++attributesCount;
+        }
+        if (lastRuntimeVisibleAnnotation != null) {
+            ++attributesCount;
+        }
+        if (lastRuntimeInvisibleAnnotation != null) {
+            ++attributesCount;
+        }
+        if (lastRuntimeVisibleTypeAnnotation != null) {
+            ++attributesCount;
+        }
+        if (lastRuntimeInvisibleTypeAnnotation != null) {
+            ++attributesCount;
+        }
+        if (firstAttribute != null) {
+            attributesCount += firstAttribute.getAttributeCount();
+        }
+        output.putShort(attributesCount);
+        // Put the field_info attributes.
+        // For ease of reference, we use here the same attribute order as in Section 4.7 of the JVMS.
+        if (constantValueIndex != 0) {
+            output
+                    .putShort(symbolTable.addConstantUtf8(Constants.CONSTANT_VALUE))
+                    .putInt(2)
+                    .putShort(constantValueIndex);
+        }
+        Attribute.putAttributes(symbolTable, accessFlags, signatureIndex, output);
+        AnnotationWriter.putAnnotations(
+                symbolTable,
+                lastRuntimeVisibleAnnotation,
+                lastRuntimeInvisibleAnnotation,
+                lastRuntimeVisibleTypeAnnotation,
+                lastRuntimeInvisibleTypeAnnotation,
+                output);
+        if (firstAttribute != null) {
+            firstAttribute.putAttributes(symbolTable, output);
+        }
+    }
+
+    /**
+      * Collects the attributes of this field into the given set of attribute prototypes.
+      *
+      * @param attributePrototypes a set of attribute prototypes.
+      */
+    final void collectAttributePrototypes(final Attribute.Set attributePrototypes) {
+        attributePrototypes.addAttributes(firstAttribute);
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/org/objectweb/asm/Frame.class b/tests/test_data/std/jdk/internal/org/objectweb/asm/Frame.class
new file mode 100644
index 0000000000000000000000000000000000000000..2ad1f5ac12858f53f417bfdbb179ce3fb087008f
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diff --git a/tests/test_data/std/jdk/internal/org/objectweb/asm/Frame.java b/tests/test_data/std/jdk/internal/org/objectweb/asm/Frame.java
new file mode 100644
index 00000000..cfb892e6
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/org/objectweb/asm/Frame.java
@@ -0,0 +1,1522 @@
+/*
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/*
+ * This file is available under and governed by the GNU General Public
+ * License version 2 only, as published by the Free Software Foundation.
+ * However, the following notice accompanied the original version of this
+ * file:
+ *
+ * ASM: a very small and fast Java bytecode manipulation framework
+ * Copyright (c) 2000-2011 INRIA, France Telecom
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the copyright holders nor the names of its
+ *    contributors may be used to endorse or promote products derived from
+ *    this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+package jdk.internal.org.objectweb.asm;
+
+/**
+ * The input and output stack map frames of a basic block.
+ *
+ * <p>Stack map frames are computed in two steps:
+ *
+ * <ul>
+ *   <li>During the visit of each instruction in MethodWriter, the state of the frame at the end of
+ *       the current basic block is updated by simulating the action of the instruction on the
+ *       previous state of this so called "output frame".
+ *   <li>After all instructions have been visited, a fix point algorithm is used in MethodWriter to
+ *       compute the "input frame" of each basic block (i.e. the stack map frame at the beginning of
+ *       the basic block). See {@link MethodWriter#computeAllFrames}.
+ * </ul>
+ *
+ * <p>Output stack map frames are computed relatively to the input frame of the basic block, which
+ * is not yet known when output frames are computed. It is therefore necessary to be able to
+ * represent abstract types such as "the type at position x in the input frame locals" or "the type
+ * at position x from the top of the input frame stack" or even "the type at position x in the input
+ * frame, with y more (or less) array dimensions". This explains the rather complicated type format
+ * used in this class, explained below.
+ *
+ * <p>The local variables and the operand stack of input and output frames contain values called
+ * "abstract types" hereafter. An abstract type is represented with 4 fields named DIM, KIND, FLAGS
+ * and VALUE, packed in a single int value for better performance and memory efficiency:
+ *
+ * <pre>
+ *   =====================================
+ *   |...DIM|KIND|.F|...............VALUE|
+ *   =====================================
+ * </pre>
+ *
+ * <ul>
+ *   <li>the DIM field, stored in the 6 most significant bits, is a signed number of array
+ *       dimensions (from -32 to 31, included). It can be retrieved with {@link #DIM_MASK} and a
+ *       right shift of {@link #DIM_SHIFT}.
+ *   <li>the KIND field, stored in 4 bits, indicates the kind of VALUE used. These 4 bits can be
+ *       retrieved with {@link #KIND_MASK} and, without any shift, must be equal to {@link
+ *       #CONSTANT_KIND}, {@link #REFERENCE_KIND}, {@link #UNINITIALIZED_KIND}, {@link
+ *       #FORWARD_UNINITIALIZED_KIND},{@link #LOCAL_KIND} or {@link #STACK_KIND}.
+ *   <li>the FLAGS field, stored in 2 bits, contains up to 2 boolean flags. Currently only one flag
+ *       is defined, namely {@link #TOP_IF_LONG_OR_DOUBLE_FLAG}.
+ *   <li>the VALUE field, stored in the remaining 20 bits, contains either
+ *       <ul>
+ *         <li>one of the constants {@link #ITEM_TOP}, {@link #ITEM_ASM_BOOLEAN}, {@link
+ *             #ITEM_ASM_BYTE}, {@link #ITEM_ASM_CHAR} or {@link #ITEM_ASM_SHORT}, {@link
+ *             #ITEM_INTEGER}, {@link #ITEM_FLOAT}, {@link #ITEM_LONG}, {@link #ITEM_DOUBLE}, {@link
+ *             #ITEM_NULL} or {@link #ITEM_UNINITIALIZED_THIS}, if KIND is equal to {@link
+ *             #CONSTANT_KIND}.
+ *         <li>the index of a {@link Symbol#TYPE_TAG} {@link Symbol} in the type table of a {@link
+ *             SymbolTable}, if KIND is equal to {@link #REFERENCE_KIND}.
+ *         <li>the index of an {@link Symbol#UNINITIALIZED_TYPE_TAG} {@link Symbol} in the type
+ *             table of a {@link SymbolTable}, if KIND is equal to {@link #UNINITIALIZED_KIND}.
+ *         <li>the index of a {@link Symbol#FORWARD_UNINITIALIZED_TYPE_TAG} {@link Symbol} in the
+ *             type table of a {@link SymbolTable}, if KIND is equal to {@link
+ *             #FORWARD_UNINITIALIZED_KIND}.
+ *         <li>the index of a local variable in the input stack frame, if KIND is equal to {@link
+ *             #LOCAL_KIND}.
+ *         <li>a position relatively to the top of the stack of the input stack frame, if KIND is
+ *             equal to {@link #STACK_KIND},
+ *       </ul>
+ * </ul>
+ *
+ * <p>Output frames can contain abstract types of any kind and with a positive or negative array
+ * dimension (and even unassigned types, represented by 0 - which does not correspond to any valid
+ * abstract type value). Input frames can only contain CONSTANT_KIND, REFERENCE_KIND,
+ * UNINITIALIZED_KIND or FORWARD_UNINITIALIZED_KIND abstract types of positive or {@literal null}
+ * array dimension. In all cases the type table contains only internal type names (array type
+ * descriptors are forbidden - array dimensions must be represented through the DIM field).
+ *
+ * <p>The LONG and DOUBLE types are always represented by using two slots (LONG + TOP or DOUBLE +
+ * TOP), for local variables as well as in the operand stack. This is necessary to be able to
+ * simulate DUPx_y instructions, whose effect would be dependent on the concrete types represented
+ * by the abstract types in the stack (which are not always known).
+ *
+ * @author Eric Bruneton
+ */
+class Frame {
+
+    // Constants used in the StackMapTable attribute.
+    // See https://docs.oracle.com/javase/specs/jvms/se9/html/jvms-4.html#jvms-4.7.4.
+
+    static final int SAME_FRAME = 0;
+    static final int SAME_LOCALS_1_STACK_ITEM_FRAME = 64;
+    static final int RESERVED = 128;
+    static final int SAME_LOCALS_1_STACK_ITEM_FRAME_EXTENDED = 247;
+    static final int CHOP_FRAME = 248;
+    static final int SAME_FRAME_EXTENDED = 251;
+    static final int APPEND_FRAME = 252;
+    static final int FULL_FRAME = 255;
+
+    static final int ITEM_TOP = 0;
+    static final int ITEM_INTEGER = 1;
+    static final int ITEM_FLOAT = 2;
+    static final int ITEM_DOUBLE = 3;
+    static final int ITEM_LONG = 4;
+    static final int ITEM_NULL = 5;
+    static final int ITEM_UNINITIALIZED_THIS = 6;
+    static final int ITEM_OBJECT = 7;
+    static final int ITEM_UNINITIALIZED = 8;
+    // Additional, ASM specific constants used in abstract types below.
+    private static final int ITEM_ASM_BOOLEAN = 9;
+    private static final int ITEM_ASM_BYTE = 10;
+    private static final int ITEM_ASM_CHAR = 11;
+    private static final int ITEM_ASM_SHORT = 12;
+
+    // The size and offset in bits of each field of an abstract type.
+
+    private static final int DIM_SIZE = 6;
+    private static final int KIND_SIZE = 4;
+    private static final int FLAGS_SIZE = 2;
+    private static final int VALUE_SIZE = 32 - DIM_SIZE - KIND_SIZE - FLAGS_SIZE;
+
+    private static final int DIM_SHIFT = KIND_SIZE + FLAGS_SIZE + VALUE_SIZE;
+    private static final int KIND_SHIFT = FLAGS_SIZE + VALUE_SIZE;
+    private static final int FLAGS_SHIFT = VALUE_SIZE;
+
+    // Bitmasks to get each field of an abstract type.
+
+    private static final int DIM_MASK = ((1 << DIM_SIZE) - 1) << DIM_SHIFT;
+    private static final int KIND_MASK = ((1 << KIND_SIZE) - 1) << KIND_SHIFT;
+    private static final int VALUE_MASK = (1 << VALUE_SIZE) - 1;
+
+    // Constants to manipulate the DIM field of an abstract type.
+
+    /** The constant to be added to an abstract type to get one with one more array dimension. */
+    private static final int ARRAY_OF = +1 << DIM_SHIFT;
+
+    /** The constant to be added to an abstract type to get one with one less array dimension. */
+    private static final int ELEMENT_OF = -1 << DIM_SHIFT;
+
+    // Possible values for the KIND field of an abstract type.
+
+    private static final int CONSTANT_KIND = 1 << KIND_SHIFT;
+    private static final int REFERENCE_KIND = 2 << KIND_SHIFT;
+    private static final int UNINITIALIZED_KIND = 3 << KIND_SHIFT;
+    private static final int FORWARD_UNINITIALIZED_KIND = 4 << KIND_SHIFT;
+    private static final int LOCAL_KIND = 5 << KIND_SHIFT;
+    private static final int STACK_KIND = 6 << KIND_SHIFT;
+
+    // Possible flags for the FLAGS field of an abstract type.
+
+    /**
+      * A flag used for LOCAL_KIND and STACK_KIND abstract types, indicating that if the resolved,
+      * concrete type is LONG or DOUBLE, TOP should be used instead (because the value has been
+      * partially overridden with an xSTORE instruction).
+      */
+    private static final int TOP_IF_LONG_OR_DOUBLE_FLAG = 1 << FLAGS_SHIFT;
+
+    // Useful predefined abstract types (all the possible CONSTANT_KIND types).
+
+    private static final int TOP = CONSTANT_KIND | ITEM_TOP;
+    private static final int BOOLEAN = CONSTANT_KIND | ITEM_ASM_BOOLEAN;
+    private static final int BYTE = CONSTANT_KIND | ITEM_ASM_BYTE;
+    private static final int CHAR = CONSTANT_KIND | ITEM_ASM_CHAR;
+    private static final int SHORT = CONSTANT_KIND | ITEM_ASM_SHORT;
+    private static final int INTEGER = CONSTANT_KIND | ITEM_INTEGER;
+    private static final int FLOAT = CONSTANT_KIND | ITEM_FLOAT;
+    private static final int LONG = CONSTANT_KIND | ITEM_LONG;
+    private static final int DOUBLE = CONSTANT_KIND | ITEM_DOUBLE;
+    private static final int NULL = CONSTANT_KIND | ITEM_NULL;
+    private static final int UNINITIALIZED_THIS = CONSTANT_KIND | ITEM_UNINITIALIZED_THIS;
+
+    // -----------------------------------------------------------------------------------------------
+    // Instance fields
+    // -----------------------------------------------------------------------------------------------
+
+    /** The basic block to which these input and output stack map frames correspond. */
+    Label owner;
+
+    /** The input stack map frame locals. This is an array of abstract types. */
+    private int[] inputLocals;
+
+    /** The input stack map frame stack. This is an array of abstract types. */
+    private int[] inputStack;
+
+    /** The output stack map frame locals. This is an array of abstract types. */
+    private int[] outputLocals;
+
+    /** The output stack map frame stack. This is an array of abstract types. */
+    private int[] outputStack;
+
+    /**
+      * The start of the output stack, relatively to the input stack. This offset is always negative or
+      * null. A null offset means that the output stack must be appended to the input stack. A -n
+      * offset means that the first n output stack elements must replace the top n input stack
+      * elements, and that the other elements must be appended to the input stack.
+      */
+    private short outputStackStart;
+
+    /** The index of the top stack element in {@link #outputStack}. */
+    private short outputStackTop;
+
+    /** The number of types that are initialized in the basic block. See {@link #initializations}. */
+    private int initializationCount;
+
+    /**
+      * The abstract types that are initialized in the basic block. A constructor invocation on an
+      * UNINITIALIZED, FORWARD_UNINITIALIZED or UNINITIALIZED_THIS abstract type must replace <i>every
+      * occurrence</i> of this type in the local variables and in the operand stack. This cannot be
+      * done during the first step of the algorithm since, during this step, the local variables and
+      * the operand stack types are still abstract. It is therefore necessary to store the abstract
+      * types of the constructors which are invoked in the basic block, in order to do this replacement
+      * during the second step of the algorithm, where the frames are fully computed. Note that this
+      * array can contain abstract types that are relative to the input locals or to the input stack.
+      */
+    private int[] initializations;
+
+    // -----------------------------------------------------------------------------------------------
+    // Constructor
+    // -----------------------------------------------------------------------------------------------
+
+    /**
+      * Constructs a new Frame.
+      *
+      * @param owner the basic block to which these input and output stack map frames correspond.
+      */
+    Frame(final Label owner) {
+        this.owner = owner;
+    }
+
+    /**
+      * Sets this frame to the value of the given frame.
+      *
+      * <p>WARNING: after this method is called the two frames share the same data structures. It is
+      * recommended to discard the given frame to avoid unexpected side effects.
+      *
+      * @param frame The new frame value.
+      */
+    final void copyFrom(final Frame frame) {
+        inputLocals = frame.inputLocals;
+        inputStack = frame.inputStack;
+        outputStackStart = 0;
+        outputLocals = frame.outputLocals;
+        outputStack = frame.outputStack;
+        outputStackTop = frame.outputStackTop;
+        initializationCount = frame.initializationCount;
+        initializations = frame.initializations;
+    }
+
+    // -----------------------------------------------------------------------------------------------
+    // Static methods to get abstract types from other type formats
+    // -----------------------------------------------------------------------------------------------
+
+    /**
+      * Returns the abstract type corresponding to the given public API frame element type.
+      *
+      * @param symbolTable the type table to use to lookup and store type {@link Symbol}.
+      * @param type a frame element type described using the same format as in {@link
+      *     MethodVisitor#visitFrame}, i.e. either {@link Opcodes#TOP}, {@link Opcodes#INTEGER}, {@link
+      *     Opcodes#FLOAT}, {@link Opcodes#LONG}, {@link Opcodes#DOUBLE}, {@link Opcodes#NULL}, or
+      *     {@link Opcodes#UNINITIALIZED_THIS}, or the internal name of a class, or a Label designating
+      *     a NEW instruction (for uninitialized types).
+      * @return the abstract type corresponding to the given frame element type.
+      */
+    static int getAbstractTypeFromApiFormat(final SymbolTable symbolTable, final Object type) {
+        if (type instanceof Integer) {
+            return CONSTANT_KIND | ((Integer) type).intValue();
+        } else if (type instanceof String) {
+            String descriptor = Type.getObjectType((String) type).getDescriptor();
+            return getAbstractTypeFromDescriptor(symbolTable, descriptor, 0);
+        } else {
+            Label label = (Label) type;
+            if ((label.flags & Label.FLAG_RESOLVED) != 0) {
+                return UNINITIALIZED_KIND | symbolTable.addUninitializedType("", label.bytecodeOffset);
+            } else {
+                return FORWARD_UNINITIALIZED_KIND | symbolTable.addForwardUninitializedType("", label);
+            }
+        }
+    }
+
+    /**
+      * Returns the abstract type corresponding to the internal name of a class.
+      *
+      * @param symbolTable the type table to use to lookup and store type {@link Symbol}.
+      * @param internalName the internal name of a class. This must <i>not</i> be an array type
+      *     descriptor.
+      * @return the abstract type value corresponding to the given internal name.
+      */
+    static int getAbstractTypeFromInternalName(
+            final SymbolTable symbolTable, final String internalName) {
+        return REFERENCE_KIND | symbolTable.addType(internalName);
+    }
+
+    /**
+      * Returns the abstract type corresponding to the given type descriptor.
+      *
+      * @param symbolTable the type table to use to lookup and store type {@link Symbol}.
+      * @param buffer a string ending with a type descriptor.
+      * @param offset the start offset of the type descriptor in buffer.
+      * @return the abstract type corresponding to the given type descriptor.
+      */
+    private static int getAbstractTypeFromDescriptor(
+            final SymbolTable symbolTable, final String buffer, final int offset) {
+        String internalName;
+        switch (buffer.charAt(offset)) {
+            case 'V':
+                return 0;
+            case 'Z':
+            case 'C':
+            case 'B':
+            case 'S':
+            case 'I':
+                return INTEGER;
+            case 'F':
+                return FLOAT;
+            case 'J':
+                return LONG;
+            case 'D':
+                return DOUBLE;
+            case 'L':
+                internalName = buffer.substring(offset + 1, buffer.length() - 1);
+                return REFERENCE_KIND | symbolTable.addType(internalName);
+            case '[':
+                int elementDescriptorOffset = offset + 1;
+                while (buffer.charAt(elementDescriptorOffset) == '[') {
+                    ++elementDescriptorOffset;
+                }
+                int typeValue;
+                switch (buffer.charAt(elementDescriptorOffset)) {
+                    case 'Z':
+                        typeValue = BOOLEAN;
+                        break;
+                    case 'C':
+                        typeValue = CHAR;
+                        break;
+                    case 'B':
+                        typeValue = BYTE;
+                        break;
+                    case 'S':
+                        typeValue = SHORT;
+                        break;
+                    case 'I':
+                        typeValue = INTEGER;
+                        break;
+                    case 'F':
+                        typeValue = FLOAT;
+                        break;
+                    case 'J':
+                        typeValue = LONG;
+                        break;
+                    case 'D':
+                        typeValue = DOUBLE;
+                        break;
+                    case 'L':
+                        internalName = buffer.substring(elementDescriptorOffset + 1, buffer.length() - 1);
+                        typeValue = REFERENCE_KIND | symbolTable.addType(internalName);
+                        break;
+                    default:
+                        throw new IllegalArgumentException(
+                                "Invalid descriptor fragment: " + buffer.substring(elementDescriptorOffset));
+                }
+                return ((elementDescriptorOffset - offset) << DIM_SHIFT) | typeValue;
+            default:
+                throw new IllegalArgumentException("Invalid descriptor: " + buffer.substring(offset));
+        }
+    }
+
+    // -----------------------------------------------------------------------------------------------
+    // Methods related to the input frame
+    // -----------------------------------------------------------------------------------------------
+
+    /**
+      * Sets the input frame from the given method description. This method is used to initialize the
+      * first frame of a method, which is implicit (i.e. not stored explicitly in the StackMapTable
+      * attribute).
+      *
+      * @param symbolTable the type table to use to lookup and store type {@link Symbol}.
+      * @param access the method's access flags.
+      * @param descriptor the method descriptor.
+      * @param maxLocals the maximum number of local variables of the method.
+      */
+    final void setInputFrameFromDescriptor(
+            final SymbolTable symbolTable,
+            final int access,
+            final String descriptor,
+            final int maxLocals) {
+        inputLocals = new int[maxLocals];
+        inputStack = new int[0];
+        int inputLocalIndex = 0;
+        if ((access & Opcodes.ACC_STATIC) == 0) {
+            if ((access & Constants.ACC_CONSTRUCTOR) == 0) {
+                inputLocals[inputLocalIndex++] =
+                        REFERENCE_KIND | symbolTable.addType(symbolTable.getClassName());
+            } else {
+                inputLocals[inputLocalIndex++] = UNINITIALIZED_THIS;
+            }
+        }
+        for (Type argumentType : Type.getArgumentTypes(descriptor)) {
+            int abstractType =
+                    getAbstractTypeFromDescriptor(symbolTable, argumentType.getDescriptor(), 0);
+            inputLocals[inputLocalIndex++] = abstractType;
+            if (abstractType == LONG || abstractType == DOUBLE) {
+                inputLocals[inputLocalIndex++] = TOP;
+            }
+        }
+        while (inputLocalIndex < maxLocals) {
+            inputLocals[inputLocalIndex++] = TOP;
+        }
+    }
+
+    /**
+      * Sets the input frame from the given public API frame description.
+      *
+      * @param symbolTable the type table to use to lookup and store type {@link Symbol}.
+      * @param numLocal the number of local variables.
+      * @param local the local variable types, described using the same format as in {@link
+      *     MethodVisitor#visitFrame}.
+      * @param numStack the number of operand stack elements.
+      * @param stack the operand stack types, described using the same format as in {@link
+      *     MethodVisitor#visitFrame}.
+      */
+    final void setInputFrameFromApiFormat(
+            final SymbolTable symbolTable,
+            final int numLocal,
+            final Object[] local,
+            final int numStack,
+            final Object[] stack) {
+        int inputLocalIndex = 0;
+        for (int i = 0; i < numLocal; ++i) {
+            inputLocals[inputLocalIndex++] = getAbstractTypeFromApiFormat(symbolTable, local[i]);
+            if (local[i] == Opcodes.LONG || local[i] == Opcodes.DOUBLE) {
+                inputLocals[inputLocalIndex++] = TOP;
+            }
+        }
+        while (inputLocalIndex < inputLocals.length) {
+            inputLocals[inputLocalIndex++] = TOP;
+        }
+        int numStackTop = 0;
+        for (int i = 0; i < numStack; ++i) {
+            if (stack[i] == Opcodes.LONG || stack[i] == Opcodes.DOUBLE) {
+                ++numStackTop;
+            }
+        }
+        inputStack = new int[numStack + numStackTop];
+        int inputStackIndex = 0;
+        for (int i = 0; i < numStack; ++i) {
+            inputStack[inputStackIndex++] = getAbstractTypeFromApiFormat(symbolTable, stack[i]);
+            if (stack[i] == Opcodes.LONG || stack[i] == Opcodes.DOUBLE) {
+                inputStack[inputStackIndex++] = TOP;
+            }
+        }
+        outputStackTop = 0;
+        initializationCount = 0;
+    }
+
+    final int getInputStackSize() {
+        return inputStack.length;
+    }
+
+    // -----------------------------------------------------------------------------------------------
+    // Methods related to the output frame
+    // -----------------------------------------------------------------------------------------------
+
+    /**
+      * Returns the abstract type stored at the given local variable index in the output frame.
+      *
+      * @param localIndex the index of the local variable whose value must be returned.
+      * @return the abstract type stored at the given local variable index in the output frame.
+      */
+    private int getLocal(final int localIndex) {
+        if (outputLocals == null || localIndex >= outputLocals.length) {
+            // If this local has never been assigned in this basic block, it is still equal to its value
+            // in the input frame.
+            return LOCAL_KIND | localIndex;
+        } else {
+            int abstractType = outputLocals[localIndex];
+            if (abstractType == 0) {
+                // If this local has never been assigned in this basic block, so it is still equal to its
+                // value in the input frame.
+                abstractType = outputLocals[localIndex] = LOCAL_KIND | localIndex;
+            }
+            return abstractType;
+        }
+    }
+
+    /**
+      * Replaces the abstract type stored at the given local variable index in the output frame.
+      *
+      * @param localIndex the index of the output frame local variable that must be set.
+      * @param abstractType the value that must be set.
+      */
+    private void setLocal(final int localIndex, final int abstractType) {
+        // Create and/or resize the output local variables array if necessary.
+        if (outputLocals == null) {
+            outputLocals = new int[10];
+        }
+        int outputLocalsLength = outputLocals.length;
+        if (localIndex >= outputLocalsLength) {
+            int[] newOutputLocals = new int[Math.max(localIndex + 1, 2 * outputLocalsLength)];
+            System.arraycopy(outputLocals, 0, newOutputLocals, 0, outputLocalsLength);
+            outputLocals = newOutputLocals;
+        }
+        // Set the local variable.
+        outputLocals[localIndex] = abstractType;
+    }
+
+    /**
+      * Pushes the given abstract type on the output frame stack.
+      *
+      * @param abstractType an abstract type.
+      */
+    private void push(final int abstractType) {
+        // Create and/or resize the output stack array if necessary.
+        if (outputStack == null) {
+            outputStack = new int[10];
+        }
+        int outputStackLength = outputStack.length;
+        if (outputStackTop >= outputStackLength) {
+            int[] newOutputStack = new int[Math.max(outputStackTop + 1, 2 * outputStackLength)];
+            System.arraycopy(outputStack, 0, newOutputStack, 0, outputStackLength);
+            outputStack = newOutputStack;
+        }
+        // Pushes the abstract type on the output stack.
+        outputStack[outputStackTop++] = abstractType;
+        // Updates the maximum size reached by the output stack, if needed (note that this size is
+        // relative to the input stack size, which is not known yet).
+        short outputStackSize = (short) (outputStackStart + outputStackTop);
+        if (outputStackSize > owner.outputStackMax) {
+            owner.outputStackMax = outputStackSize;
+        }
+    }
+
+    /**
+      * Pushes the abstract type corresponding to the given descriptor on the output frame stack.
+      *
+      * @param symbolTable the type table to use to lookup and store type {@link Symbol}.
+      * @param descriptor a type or method descriptor (in which case its return type is pushed).
+      */
+    private void push(final SymbolTable symbolTable, final String descriptor) {
+        int typeDescriptorOffset =
+                descriptor.charAt(0) == '(' ? Type.getReturnTypeOffset(descriptor) : 0;
+        int abstractType = getAbstractTypeFromDescriptor(symbolTable, descriptor, typeDescriptorOffset);
+        if (abstractType != 0) {
+            push(abstractType);
+            if (abstractType == LONG || abstractType == DOUBLE) {
+                push(TOP);
+            }
+        }
+    }
+
+    /**
+      * Pops an abstract type from the output frame stack and returns its value.
+      *
+      * @return the abstract type that has been popped from the output frame stack.
+      */
+    private int pop() {
+        if (outputStackTop > 0) {
+            return outputStack[--outputStackTop];
+        } else {
+            // If the output frame stack is empty, pop from the input stack.
+            return STACK_KIND | -(--outputStackStart);
+        }
+    }
+
+    /**
+      * Pops the given number of abstract types from the output frame stack.
+      *
+      * @param elements the number of abstract types that must be popped.
+      */
+    private void pop(final int elements) {
+        if (outputStackTop >= elements) {
+            outputStackTop -= (short)elements;
+        } else {
+            // If the number of elements to be popped is greater than the number of elements in the output
+            // stack, clear it, and pop the remaining elements from the input stack.
+            outputStackStart -= (short) (elements - outputStackTop);
+            outputStackTop = 0;
+        }
+    }
+
+    /**
+      * Pops as many abstract types from the output frame stack as described by the given descriptor.
+      *
+      * @param descriptor a type or method descriptor (in which case its argument types are popped).
+      */
+    private void pop(final String descriptor) {
+        char firstDescriptorChar = descriptor.charAt(0);
+        if (firstDescriptorChar == '(') {
+            pop((Type.getArgumentsAndReturnSizes(descriptor) >> 2) - 1);
+        } else if (firstDescriptorChar == 'J' || firstDescriptorChar == 'D') {
+            pop(2);
+        } else {
+            pop(1);
+        }
+    }
+
+    // -----------------------------------------------------------------------------------------------
+    // Methods to handle uninitialized types
+    // -----------------------------------------------------------------------------------------------
+
+    /**
+      * Adds an abstract type to the list of types on which a constructor is invoked in the basic
+      * block.
+      *
+      * @param abstractType an abstract type on a which a constructor is invoked.
+      */
+    private void addInitializedType(final int abstractType) {
+        // Create and/or resize the initializations array if necessary.
+        if (initializations == null) {
+            initializations = new int[2];
+        }
+        int initializationsLength = initializations.length;
+        if (initializationCount >= initializationsLength) {
+            int[] newInitializations =
+                    new int[Math.max(initializationCount + 1, 2 * initializationsLength)];
+            System.arraycopy(initializations, 0, newInitializations, 0, initializationsLength);
+            initializations = newInitializations;
+        }
+        // Store the abstract type.
+        initializations[initializationCount++] = abstractType;
+    }
+
+    /**
+      * Returns the "initialized" abstract type corresponding to the given abstract type.
+      *
+      * @param symbolTable the type table to use to lookup and store type {@link Symbol}.
+      * @param abstractType an abstract type.
+      * @return the REFERENCE_KIND abstract type corresponding to abstractType if it is
+      *     UNINITIALIZED_THIS or an UNINITIALIZED_KIND or FORWARD_UNINITIALIZED_KIND abstract type for
+      *     one of the types on which a constructor is invoked in the basic block. Otherwise returns
+      *     abstractType.
+      */
+    private int getInitializedType(final SymbolTable symbolTable, final int abstractType) {
+        if (abstractType == UNINITIALIZED_THIS
+                || (abstractType & (DIM_MASK | KIND_MASK)) == UNINITIALIZED_KIND
+                || (abstractType & (DIM_MASK | KIND_MASK)) == FORWARD_UNINITIALIZED_KIND) {
+            for (int i = 0; i < initializationCount; ++i) {
+                int initializedType = initializations[i];
+                int dim = initializedType & DIM_MASK;
+                int kind = initializedType & KIND_MASK;
+                int value = initializedType & VALUE_MASK;
+                if (kind == LOCAL_KIND) {
+                    initializedType = dim + inputLocals[value];
+                } else if (kind == STACK_KIND) {
+                    initializedType = dim + inputStack[inputStack.length - value];
+                }
+                if (abstractType == initializedType) {
+                    if (abstractType == UNINITIALIZED_THIS) {
+                        return REFERENCE_KIND | symbolTable.addType(symbolTable.getClassName());
+                    } else {
+                        return REFERENCE_KIND
+                                | symbolTable.addType(symbolTable.getType(abstractType & VALUE_MASK).value);
+                    }
+                }
+            }
+        }
+        return abstractType;
+    }
+
+    // -----------------------------------------------------------------------------------------------
+    // Main method, to simulate the execution of each instruction on the output frame
+    // -----------------------------------------------------------------------------------------------
+
+    /**
+      * Simulates the action of the given instruction on the output stack frame.
+      *
+      * @param opcode the opcode of the instruction.
+      * @param arg the numeric operand of the instruction, if any.
+      * @param argSymbol the Symbol operand of the instruction, if any.
+      * @param symbolTable the type table to use to lookup and store type {@link Symbol}.
+      */
+    void execute(
+            final int opcode, final int arg, final Symbol argSymbol, final SymbolTable symbolTable) {
+        // Abstract types popped from the stack or read from local variables.
+        int abstractType1;
+        int abstractType2;
+        int abstractType3;
+        int abstractType4;
+        switch (opcode) {
+            case Opcodes.NOP:
+            case Opcodes.INEG:
+            case Opcodes.LNEG:
+            case Opcodes.FNEG:
+            case Opcodes.DNEG:
+            case Opcodes.I2B:
+            case Opcodes.I2C:
+            case Opcodes.I2S:
+            case Opcodes.GOTO:
+            case Opcodes.RETURN:
+                break;
+            case Opcodes.ACONST_NULL:
+                push(NULL);
+                break;
+            case Opcodes.ICONST_M1:
+            case Opcodes.ICONST_0:
+            case Opcodes.ICONST_1:
+            case Opcodes.ICONST_2:
+            case Opcodes.ICONST_3:
+            case Opcodes.ICONST_4:
+            case Opcodes.ICONST_5:
+            case Opcodes.BIPUSH:
+            case Opcodes.SIPUSH:
+            case Opcodes.ILOAD:
+                push(INTEGER);
+                break;
+            case Opcodes.LCONST_0:
+            case Opcodes.LCONST_1:
+            case Opcodes.LLOAD:
+                push(LONG);
+                push(TOP);
+                break;
+            case Opcodes.FCONST_0:
+            case Opcodes.FCONST_1:
+            case Opcodes.FCONST_2:
+            case Opcodes.FLOAD:
+                push(FLOAT);
+                break;
+            case Opcodes.DCONST_0:
+            case Opcodes.DCONST_1:
+            case Opcodes.DLOAD:
+                push(DOUBLE);
+                push(TOP);
+                break;
+            case Opcodes.LDC:
+                switch (argSymbol.tag) {
+                    case Symbol.CONSTANT_INTEGER_TAG:
+                        push(INTEGER);
+                        break;
+                    case Symbol.CONSTANT_LONG_TAG:
+                        push(LONG);
+                        push(TOP);
+                        break;
+                    case Symbol.CONSTANT_FLOAT_TAG:
+                        push(FLOAT);
+                        break;
+                    case Symbol.CONSTANT_DOUBLE_TAG:
+                        push(DOUBLE);
+                        push(TOP);
+                        break;
+                    case Symbol.CONSTANT_CLASS_TAG:
+                        push(REFERENCE_KIND | symbolTable.addType("java/lang/Class"));
+                        break;
+                    case Symbol.CONSTANT_STRING_TAG:
+                        push(REFERENCE_KIND | symbolTable.addType("java/lang/String"));
+                        break;
+                    case Symbol.CONSTANT_METHOD_TYPE_TAG:
+                        push(REFERENCE_KIND | symbolTable.addType("java/lang/invoke/MethodType"));
+                        break;
+                    case Symbol.CONSTANT_METHOD_HANDLE_TAG:
+                        push(REFERENCE_KIND | symbolTable.addType("java/lang/invoke/MethodHandle"));
+                        break;
+                    case Symbol.CONSTANT_DYNAMIC_TAG:
+                        push(symbolTable, argSymbol.value);
+                        break;
+                    default:
+                        throw new AssertionError();
+                }
+                break;
+            case Opcodes.ALOAD:
+                push(getLocal(arg));
+                break;
+            case Opcodes.LALOAD:
+            case Opcodes.D2L:
+                pop(2);
+                push(LONG);
+                push(TOP);
+                break;
+            case Opcodes.DALOAD:
+            case Opcodes.L2D:
+                pop(2);
+                push(DOUBLE);
+                push(TOP);
+                break;
+            case Opcodes.AALOAD:
+                pop(1);
+                abstractType1 = pop();
+                push(abstractType1 == NULL ? abstractType1 : ELEMENT_OF + abstractType1);
+                break;
+            case Opcodes.ISTORE:
+            case Opcodes.FSTORE:
+            case Opcodes.ASTORE:
+                abstractType1 = pop();
+                setLocal(arg, abstractType1);
+                if (arg > 0) {
+                    int previousLocalType = getLocal(arg - 1);
+                    if (previousLocalType == LONG || previousLocalType == DOUBLE) {
+                        setLocal(arg - 1, TOP);
+                    } else if ((previousLocalType & KIND_MASK) == LOCAL_KIND
+                            || (previousLocalType & KIND_MASK) == STACK_KIND) {
+                        // The type of the previous local variable is not known yet, but if it later appears
+                        // to be LONG or DOUBLE, we should then use TOP instead.
+                        setLocal(arg - 1, previousLocalType | TOP_IF_LONG_OR_DOUBLE_FLAG);
+                    }
+                }
+                break;
+            case Opcodes.LSTORE:
+            case Opcodes.DSTORE:
+                pop(1);
+                abstractType1 = pop();
+                setLocal(arg, abstractType1);
+                setLocal(arg + 1, TOP);
+                if (arg > 0) {
+                    int previousLocalType = getLocal(arg - 1);
+                    if (previousLocalType == LONG || previousLocalType == DOUBLE) {
+                        setLocal(arg - 1, TOP);
+                    } else if ((previousLocalType & KIND_MASK) == LOCAL_KIND
+                            || (previousLocalType & KIND_MASK) == STACK_KIND) {
+                        // The type of the previous local variable is not known yet, but if it later appears
+                        // to be LONG or DOUBLE, we should then use TOP instead.
+                        setLocal(arg - 1, previousLocalType | TOP_IF_LONG_OR_DOUBLE_FLAG);
+                    }
+                }
+                break;
+            case Opcodes.IASTORE:
+            case Opcodes.BASTORE:
+            case Opcodes.CASTORE:
+            case Opcodes.SASTORE:
+            case Opcodes.FASTORE:
+            case Opcodes.AASTORE:
+                pop(3);
+                break;
+            case Opcodes.LASTORE:
+            case Opcodes.DASTORE:
+                pop(4);
+                break;
+            case Opcodes.POP:
+            case Opcodes.IFEQ:
+            case Opcodes.IFNE:
+            case Opcodes.IFLT:
+            case Opcodes.IFGE:
+            case Opcodes.IFGT:
+            case Opcodes.IFLE:
+            case Opcodes.IRETURN:
+            case Opcodes.FRETURN:
+            case Opcodes.ARETURN:
+            case Opcodes.TABLESWITCH:
+            case Opcodes.LOOKUPSWITCH:
+            case Opcodes.ATHROW:
+            case Opcodes.MONITORENTER:
+            case Opcodes.MONITOREXIT:
+            case Opcodes.IFNULL:
+            case Opcodes.IFNONNULL:
+                pop(1);
+                break;
+            case Opcodes.POP2:
+            case Opcodes.IF_ICMPEQ:
+            case Opcodes.IF_ICMPNE:
+            case Opcodes.IF_ICMPLT:
+            case Opcodes.IF_ICMPGE:
+            case Opcodes.IF_ICMPGT:
+            case Opcodes.IF_ICMPLE:
+            case Opcodes.IF_ACMPEQ:
+            case Opcodes.IF_ACMPNE:
+            case Opcodes.LRETURN:
+            case Opcodes.DRETURN:
+                pop(2);
+                break;
+            case Opcodes.DUP:
+                abstractType1 = pop();
+                push(abstractType1);
+                push(abstractType1);
+                break;
+            case Opcodes.DUP_X1:
+                abstractType1 = pop();
+                abstractType2 = pop();
+                push(abstractType1);
+                push(abstractType2);
+                push(abstractType1);
+                break;
+            case Opcodes.DUP_X2:
+                abstractType1 = pop();
+                abstractType2 = pop();
+                abstractType3 = pop();
+                push(abstractType1);
+                push(abstractType3);
+                push(abstractType2);
+                push(abstractType1);
+                break;
+            case Opcodes.DUP2:
+                abstractType1 = pop();
+                abstractType2 = pop();
+                push(abstractType2);
+                push(abstractType1);
+                push(abstractType2);
+                push(abstractType1);
+                break;
+            case Opcodes.DUP2_X1:
+                abstractType1 = pop();
+                abstractType2 = pop();
+                abstractType3 = pop();
+                push(abstractType2);
+                push(abstractType1);
+                push(abstractType3);
+                push(abstractType2);
+                push(abstractType1);
+                break;
+            case Opcodes.DUP2_X2:
+                abstractType1 = pop();
+                abstractType2 = pop();
+                abstractType3 = pop();
+                abstractType4 = pop();
+                push(abstractType2);
+                push(abstractType1);
+                push(abstractType4);
+                push(abstractType3);
+                push(abstractType2);
+                push(abstractType1);
+                break;
+            case Opcodes.SWAP:
+                abstractType1 = pop();
+                abstractType2 = pop();
+                push(abstractType1);
+                push(abstractType2);
+                break;
+            case Opcodes.IALOAD:
+            case Opcodes.BALOAD:
+            case Opcodes.CALOAD:
+            case Opcodes.SALOAD:
+            case Opcodes.IADD:
+            case Opcodes.ISUB:
+            case Opcodes.IMUL:
+            case Opcodes.IDIV:
+            case Opcodes.IREM:
+            case Opcodes.IAND:
+            case Opcodes.IOR:
+            case Opcodes.IXOR:
+            case Opcodes.ISHL:
+            case Opcodes.ISHR:
+            case Opcodes.IUSHR:
+            case Opcodes.L2I:
+            case Opcodes.D2I:
+            case Opcodes.FCMPL:
+            case Opcodes.FCMPG:
+                pop(2);
+                push(INTEGER);
+                break;
+            case Opcodes.LADD:
+            case Opcodes.LSUB:
+            case Opcodes.LMUL:
+            case Opcodes.LDIV:
+            case Opcodes.LREM:
+            case Opcodes.LAND:
+            case Opcodes.LOR:
+            case Opcodes.LXOR:
+                pop(4);
+                push(LONG);
+                push(TOP);
+                break;
+            case Opcodes.FALOAD:
+            case Opcodes.FADD:
+            case Opcodes.FSUB:
+            case Opcodes.FMUL:
+            case Opcodes.FDIV:
+            case Opcodes.FREM:
+            case Opcodes.L2F:
+            case Opcodes.D2F:
+                pop(2);
+                push(FLOAT);
+                break;
+            case Opcodes.DADD:
+            case Opcodes.DSUB:
+            case Opcodes.DMUL:
+            case Opcodes.DDIV:
+            case Opcodes.DREM:
+                pop(4);
+                push(DOUBLE);
+                push(TOP);
+                break;
+            case Opcodes.LSHL:
+            case Opcodes.LSHR:
+            case Opcodes.LUSHR:
+                pop(3);
+                push(LONG);
+                push(TOP);
+                break;
+            case Opcodes.IINC:
+                setLocal(arg, INTEGER);
+                break;
+            case Opcodes.I2L:
+            case Opcodes.F2L:
+                pop(1);
+                push(LONG);
+                push(TOP);
+                break;
+            case Opcodes.I2F:
+                pop(1);
+                push(FLOAT);
+                break;
+            case Opcodes.I2D:
+            case Opcodes.F2D:
+                pop(1);
+                push(DOUBLE);
+                push(TOP);
+                break;
+            case Opcodes.F2I:
+            case Opcodes.ARRAYLENGTH:
+            case Opcodes.INSTANCEOF:
+                pop(1);
+                push(INTEGER);
+                break;
+            case Opcodes.LCMP:
+            case Opcodes.DCMPL:
+            case Opcodes.DCMPG:
+                pop(4);
+                push(INTEGER);
+                break;
+            case Opcodes.JSR:
+            case Opcodes.RET:
+                throw new IllegalArgumentException("JSR/RET are not supported with computeFrames option");
+            case Opcodes.GETSTATIC:
+                push(symbolTable, argSymbol.value);
+                break;
+            case Opcodes.PUTSTATIC:
+                pop(argSymbol.value);
+                break;
+            case Opcodes.GETFIELD:
+                pop(1);
+                push(symbolTable, argSymbol.value);
+                break;
+            case Opcodes.PUTFIELD:
+                pop(argSymbol.value);
+                pop();
+                break;
+            case Opcodes.INVOKEVIRTUAL:
+            case Opcodes.INVOKESPECIAL:
+            case Opcodes.INVOKESTATIC:
+            case Opcodes.INVOKEINTERFACE:
+                pop(argSymbol.value);
+                if (opcode != Opcodes.INVOKESTATIC) {
+                    abstractType1 = pop();
+                    if (opcode == Opcodes.INVOKESPECIAL && argSymbol.name.charAt(0) == '<') {
+                        addInitializedType(abstractType1);
+                    }
+                }
+                push(symbolTable, argSymbol.value);
+                break;
+            case Opcodes.INVOKEDYNAMIC:
+                pop(argSymbol.value);
+                push(symbolTable, argSymbol.value);
+                break;
+            case Opcodes.NEW:
+                push(UNINITIALIZED_KIND | symbolTable.addUninitializedType(argSymbol.value, arg));
+                break;
+            case Opcodes.NEWARRAY:
+                pop();
+                switch (arg) {
+                    case Opcodes.T_BOOLEAN:
+                        push(ARRAY_OF | BOOLEAN);
+                        break;
+                    case Opcodes.T_CHAR:
+                        push(ARRAY_OF | CHAR);
+                        break;
+                    case Opcodes.T_BYTE:
+                        push(ARRAY_OF | BYTE);
+                        break;
+                    case Opcodes.T_SHORT:
+                        push(ARRAY_OF | SHORT);
+                        break;
+                    case Opcodes.T_INT:
+                        push(ARRAY_OF | INTEGER);
+                        break;
+                    case Opcodes.T_FLOAT:
+                        push(ARRAY_OF | FLOAT);
+                        break;
+                    case Opcodes.T_DOUBLE:
+                        push(ARRAY_OF | DOUBLE);
+                        break;
+                    case Opcodes.T_LONG:
+                        push(ARRAY_OF | LONG);
+                        break;
+                    default:
+                        throw new IllegalArgumentException();
+                }
+                break;
+            case Opcodes.ANEWARRAY:
+                String arrayElementType = argSymbol.value;
+                pop();
+                if (arrayElementType.charAt(0) == '[') {
+                    push(symbolTable, '[' + arrayElementType);
+                } else {
+                    push(ARRAY_OF | REFERENCE_KIND | symbolTable.addType(arrayElementType));
+                }
+                break;
+            case Opcodes.CHECKCAST:
+                String castType = argSymbol.value;
+                pop();
+                if (castType.charAt(0) == '[') {
+                    push(symbolTable, castType);
+                } else {
+                    push(REFERENCE_KIND | symbolTable.addType(castType));
+                }
+                break;
+            case Opcodes.MULTIANEWARRAY:
+                pop(arg);
+                push(symbolTable, argSymbol.value);
+                break;
+            default:
+                throw new IllegalArgumentException();
+        }
+    }
+
+    // -----------------------------------------------------------------------------------------------
+    // Frame merging methods, used in the second step of the stack map frame computation algorithm
+    // -----------------------------------------------------------------------------------------------
+
+    /**
+      * Computes the concrete output type corresponding to a given abstract output type.
+      *
+      * @param abstractOutputType an abstract output type.
+      * @param numStack the size of the input stack, used to resolve abstract output types of
+      *     STACK_KIND kind.
+      * @return the concrete output type corresponding to 'abstractOutputType'.
+      */
+    private int getConcreteOutputType(final int abstractOutputType, final int numStack) {
+        int dim = abstractOutputType & DIM_MASK;
+        int kind = abstractOutputType & KIND_MASK;
+        if (kind == LOCAL_KIND) {
+            // By definition, a LOCAL_KIND type designates the concrete type of a local variable at
+            // the beginning of the basic block corresponding to this frame (which is known when
+            // this method is called, but was not when the abstract type was computed).
+            int concreteOutputType = dim + inputLocals[abstractOutputType & VALUE_MASK];
+            if ((abstractOutputType & TOP_IF_LONG_OR_DOUBLE_FLAG) != 0
+                    && (concreteOutputType == LONG || concreteOutputType == DOUBLE)) {
+                concreteOutputType = TOP;
+            }
+            return concreteOutputType;
+        } else if (kind == STACK_KIND) {
+            // By definition, a STACK_KIND type designates the concrete type of a local variable at
+            // the beginning of the basic block corresponding to this frame (which is known when
+            // this method is called, but was not when the abstract type was computed).
+            int concreteOutputType = dim + inputStack[numStack - (abstractOutputType & VALUE_MASK)];
+            if ((abstractOutputType & TOP_IF_LONG_OR_DOUBLE_FLAG) != 0
+                    && (concreteOutputType == LONG || concreteOutputType == DOUBLE)) {
+                concreteOutputType = TOP;
+            }
+            return concreteOutputType;
+        } else {
+            return abstractOutputType;
+        }
+    }
+
+    /**
+      * Merges the input frame of the given {@link Frame} with the input and output frames of this
+      * {@link Frame}. Returns {@literal true} if the given frame has been changed by this operation
+      * (the input and output frames of this {@link Frame} are never changed).
+      *
+      * @param symbolTable the type table to use to lookup and store type {@link Symbol}.
+      * @param dstFrame the {@link Frame} whose input frame must be updated. This should be the frame
+      *     of a successor, in the control flow graph, of the basic block corresponding to this frame.
+      * @param catchTypeIndex if 'frame' corresponds to an exception handler basic block, the type
+      *     table index of the caught exception type, otherwise 0.
+      * @return {@literal true} if the input frame of 'frame' has been changed by this operation.
+      */
+    final boolean merge(
+            final SymbolTable symbolTable, final Frame dstFrame, final int catchTypeIndex) {
+        boolean frameChanged = false;
+
+        // Compute the concrete types of the local variables at the end of the basic block corresponding
+        // to this frame, by resolving its abstract output types, and merge these concrete types with
+        // those of the local variables in the input frame of dstFrame.
+        int numLocal = inputLocals.length;
+        int numStack = inputStack.length;
+        if (dstFrame.inputLocals == null) {
+            dstFrame.inputLocals = new int[numLocal];
+            frameChanged = true;
+        }
+        for (int i = 0; i < numLocal; ++i) {
+            int concreteOutputType;
+            if (outputLocals != null && i < outputLocals.length) {
+                int abstractOutputType = outputLocals[i];
+                if (abstractOutputType == 0) {
+                    // If the local variable has never been assigned in this basic block, it is equal to its
+                    // value at the beginning of the block.
+                    concreteOutputType = inputLocals[i];
+                } else {
+                    concreteOutputType = getConcreteOutputType(abstractOutputType, numStack);
+                }
+            } else {
+                // If the local variable has never been assigned in this basic block, it is equal to its
+                // value at the beginning of the block.
+                concreteOutputType = inputLocals[i];
+            }
+            // concreteOutputType might be an uninitialized type from the input locals or from the input
+            // stack. However, if a constructor has been called for this class type in the basic block,
+            // then this type is no longer uninitialized at the end of basic block.
+            if (initializations != null) {
+                concreteOutputType = getInitializedType(symbolTable, concreteOutputType);
+            }
+            frameChanged |= merge(symbolTable, concreteOutputType, dstFrame.inputLocals, i);
+        }
+
+        // If dstFrame is an exception handler block, it can be reached from any instruction of the
+        // basic block corresponding to this frame, in particular from the first one. Therefore, the
+        // input locals of dstFrame should be compatible (i.e. merged) with the input locals of this
+        // frame (and the input stack of dstFrame should be compatible, i.e. merged, with a one
+        // element stack containing the caught exception type).
+        if (catchTypeIndex > 0) {
+            for (int i = 0; i < numLocal; ++i) {
+                frameChanged |= merge(symbolTable, inputLocals[i], dstFrame.inputLocals, i);
+            }
+            if (dstFrame.inputStack == null) {
+                dstFrame.inputStack = new int[1];
+                frameChanged = true;
+            }
+            frameChanged |= merge(symbolTable, catchTypeIndex, dstFrame.inputStack, 0);
+            return frameChanged;
+        }
+
+        // Compute the concrete types of the stack operands at the end of the basic block corresponding
+        // to this frame, by resolving its abstract output types, and merge these concrete types with
+        // those of the stack operands in the input frame of dstFrame.
+        int numInputStack = inputStack.length + outputStackStart;
+        if (dstFrame.inputStack == null) {
+            dstFrame.inputStack = new int[numInputStack + outputStackTop];
+            frameChanged = true;
+        }
+        // First, do this for the stack operands that have not been popped in the basic block
+        // corresponding to this frame, and which are therefore equal to their value in the input
+        // frame (except for uninitialized types, which may have been initialized).
+        for (int i = 0; i < numInputStack; ++i) {
+            int concreteOutputType = inputStack[i];
+            if (initializations != null) {
+                concreteOutputType = getInitializedType(symbolTable, concreteOutputType);
+            }
+            frameChanged |= merge(symbolTable, concreteOutputType, dstFrame.inputStack, i);
+        }
+        // Then, do this for the stack operands that have pushed in the basic block (this code is the
+        // same as the one above for local variables).
+        for (int i = 0; i < outputStackTop; ++i) {
+            int abstractOutputType = outputStack[i];
+            int concreteOutputType = getConcreteOutputType(abstractOutputType, numStack);
+            if (initializations != null) {
+                concreteOutputType = getInitializedType(symbolTable, concreteOutputType);
+            }
+            frameChanged |=
+                    merge(symbolTable, concreteOutputType, dstFrame.inputStack, numInputStack + i);
+        }
+        return frameChanged;
+    }
+
+    /**
+      * Merges the type at the given index in the given abstract type array with the given type.
+      * Returns {@literal true} if the type array has been modified by this operation.
+      *
+      * @param symbolTable the type table to use to lookup and store type {@link Symbol}.
+      * @param sourceType the abstract type with which the abstract type array element must be merged.
+      *     This type should be of {@link #CONSTANT_KIND}, {@link #REFERENCE_KIND}, {@link
+      *     #UNINITIALIZED_KIND} or {@link #FORWARD_UNINITIALIZED_KIND} kind, with positive or
+      *     {@literal null} array dimensions.
+      * @param dstTypes an array of abstract types. These types should be of {@link #CONSTANT_KIND},
+      *     {@link #REFERENCE_KIND}, {@link #UNINITIALIZED_KIND} or {@link #FORWARD_UNINITIALIZED_KIND}
+      *     kind, with positive or {@literal null} array dimensions.
+      * @param dstIndex the index of the type that must be merged in dstTypes.
+      * @return {@literal true} if the type array has been modified by this operation.
+      */
+    private static boolean merge(
+            final SymbolTable symbolTable,
+            final int sourceType,
+            final int[] dstTypes,
+            final int dstIndex) {
+        int dstType = dstTypes[dstIndex];
+        if (dstType == sourceType) {
+            // If the types are equal, merge(sourceType, dstType) = dstType, so there is no change.
+            return false;
+        }
+        int srcType = sourceType;
+        if ((sourceType & ~DIM_MASK) == NULL) {
+            if (dstType == NULL) {
+                return false;
+            }
+            srcType = NULL;
+        }
+        if (dstType == 0) {
+            // If dstTypes[dstIndex] has never been assigned, merge(srcType, dstType) = srcType.
+            dstTypes[dstIndex] = srcType;
+            return true;
+        }
+        int mergedType;
+        if ((dstType & DIM_MASK) != 0 || (dstType & KIND_MASK) == REFERENCE_KIND) {
+            // If dstType is a reference type of any array dimension.
+            if (srcType == NULL) {
+                // If srcType is the NULL type, merge(srcType, dstType) = dstType, so there is no change.
+                return false;
+            } else if ((srcType & (DIM_MASK | KIND_MASK)) == (dstType & (DIM_MASK | KIND_MASK))) {
+                // If srcType has the same array dimension and the same kind as dstType.
+                if ((dstType & KIND_MASK) == REFERENCE_KIND) {
+                    // If srcType and dstType are reference types with the same array dimension,
+                    // merge(srcType, dstType) = dim(srcType) | common super class of srcType and dstType.
+                    mergedType =
+                            (srcType & DIM_MASK)
+                                    | REFERENCE_KIND
+                                    | symbolTable.addMergedType(srcType & VALUE_MASK, dstType & VALUE_MASK);
+                } else {
+                    // If srcType and dstType are array types of equal dimension but different element types,
+                    // merge(srcType, dstType) = dim(srcType) - 1 | java/lang/Object.
+                    int mergedDim = ELEMENT_OF + (srcType & DIM_MASK);
+                    mergedType = mergedDim | REFERENCE_KIND | symbolTable.addType("java/lang/Object");
+                }
+            } else if ((srcType & DIM_MASK) != 0 || (srcType & KIND_MASK) == REFERENCE_KIND) {
+                // If srcType is any other reference or array type,
+                // merge(srcType, dstType) = min(srcDdim, dstDim) | java/lang/Object
+                // where srcDim is the array dimension of srcType, minus 1 if srcType is an array type
+                // with a non reference element type (and similarly for dstDim).
+                int srcDim = srcType & DIM_MASK;
+                if (srcDim != 0 && (srcType & KIND_MASK) != REFERENCE_KIND) {
+                    srcDim = ELEMENT_OF + srcDim;
+                }
+                int dstDim = dstType & DIM_MASK;
+                if (dstDim != 0 && (dstType & KIND_MASK) != REFERENCE_KIND) {
+                    dstDim = ELEMENT_OF + dstDim;
+                }
+                mergedType =
+                        Math.min(srcDim, dstDim) | REFERENCE_KIND | symbolTable.addType("java/lang/Object");
+            } else {
+                // If srcType is any other type, merge(srcType, dstType) = TOP.
+                mergedType = TOP;
+            }
+        } else if (dstType == NULL) {
+            // If dstType is the NULL type, merge(srcType, dstType) = srcType, or TOP if srcType is not a
+            // an array type or a reference type.
+            mergedType =
+                    (srcType & DIM_MASK) != 0 || (srcType & KIND_MASK) == REFERENCE_KIND ? srcType : TOP;
+        } else {
+            // If dstType is any other type, merge(srcType, dstType) = TOP whatever srcType.
+            mergedType = TOP;
+        }
+        if (mergedType != dstType) {
+            dstTypes[dstIndex] = mergedType;
+            return true;
+        }
+        return false;
+    }
+
+    // -----------------------------------------------------------------------------------------------
+    // Frame output methods, to generate StackMapFrame attributes
+    // -----------------------------------------------------------------------------------------------
+
+    /**
+      * Makes the given {@link MethodWriter} visit the input frame of this {@link Frame}. The visit is
+      * done with the {@link MethodWriter#visitFrameStart}, {@link MethodWriter#visitAbstractType} and
+      * {@link MethodWriter#visitFrameEnd} methods.
+      *
+      * @param methodWriter the {@link MethodWriter} that should visit the input frame of this {@link
+      *     Frame}.
+      */
+    final void accept(final MethodWriter methodWriter) {
+        // Compute the number of locals, ignoring TOP types that are just after a LONG or a DOUBLE, and
+        // all trailing TOP types.
+        int[] localTypes = inputLocals;
+        int numLocal = 0;
+        int numTrailingTop = 0;
+        int i = 0;
+        while (i < localTypes.length) {
+            int localType = localTypes[i];
+            i += (localType == LONG || localType == DOUBLE) ? 2 : 1;
+            if (localType == TOP) {
+                numTrailingTop++;
+            } else {
+                numLocal += numTrailingTop + 1;
+                numTrailingTop = 0;
+            }
+        }
+        // Compute the stack size, ignoring TOP types that are just after a LONG or a DOUBLE.
+        int[] stackTypes = inputStack;
+        int numStack = 0;
+        i = 0;
+        while (i < stackTypes.length) {
+            int stackType = stackTypes[i];
+            i += (stackType == LONG || stackType == DOUBLE) ? 2 : 1;
+            numStack++;
+        }
+        // Visit the frame and its content.
+        int frameIndex = methodWriter.visitFrameStart(owner.bytecodeOffset, numLocal, numStack);
+        i = 0;
+        while (numLocal-- > 0) {
+            int localType = localTypes[i];
+            i += (localType == LONG || localType == DOUBLE) ? 2 : 1;
+            methodWriter.visitAbstractType(frameIndex++, localType);
+        }
+        i = 0;
+        while (numStack-- > 0) {
+            int stackType = stackTypes[i];
+            i += (stackType == LONG || stackType == DOUBLE) ? 2 : 1;
+            methodWriter.visitAbstractType(frameIndex++, stackType);
+        }
+        methodWriter.visitFrameEnd();
+    }
+
+    /**
+      * Put the given abstract type in the given ByteVector, using the JVMS verification_type_info
+      * format used in StackMapTable attributes.
+      *
+      * @param symbolTable the type table to use to lookup and store type {@link Symbol}.
+      * @param abstractType an abstract type, restricted to {@link Frame#CONSTANT_KIND}, {@link
+      *     Frame#REFERENCE_KIND}, {@link Frame#UNINITIALIZED_KIND} or {@link
+      *     Frame#FORWARD_UNINITIALIZED_KIND} types.
+      * @param output where the abstract type must be put.
+      * @see <a href="https://docs.oracle.com/javase/specs/jvms/se9/html/jvms-4.html#jvms-4.7.4">JVMS
+      *     4.7.4</a>
+      */
+    static void putAbstractType(
+            final SymbolTable symbolTable, final int abstractType, final ByteVector output) {
+        int arrayDimensions = (abstractType & Frame.DIM_MASK) >> DIM_SHIFT;
+        if (arrayDimensions == 0) {
+            int typeValue = abstractType & VALUE_MASK;
+            switch (abstractType & KIND_MASK) {
+                case CONSTANT_KIND:
+                    output.putByte(typeValue);
+                    break;
+                case REFERENCE_KIND:
+                    output
+                            .putByte(ITEM_OBJECT)
+                            .putShort(symbolTable.addConstantClass(symbolTable.getType(typeValue).value).index);
+                    break;
+                case UNINITIALIZED_KIND:
+                    output.putByte(ITEM_UNINITIALIZED).putShort((int) symbolTable.getType(typeValue).data);
+                    break;
+                case FORWARD_UNINITIALIZED_KIND:
+                    output.putByte(ITEM_UNINITIALIZED);
+                    symbolTable.getForwardUninitializedLabel(typeValue).put(output);
+                    break;
+                default:
+                    throw new AssertionError();
+            }
+        } else {
+            // Case of an array type, we need to build its descriptor first.
+            StringBuilder typeDescriptor = new StringBuilder();
+            while (arrayDimensions-- > 0) {
+                typeDescriptor.append('[');
+            }
+            if ((abstractType & KIND_MASK) == REFERENCE_KIND) {
+                typeDescriptor
+                        .append('L')
+                        .append(symbolTable.getType(abstractType & VALUE_MASK).value)
+                        .append(';');
+            } else {
+                switch (abstractType & VALUE_MASK) {
+                    case Frame.ITEM_ASM_BOOLEAN:
+                        typeDescriptor.append('Z');
+                        break;
+                    case Frame.ITEM_ASM_BYTE:
+                        typeDescriptor.append('B');
+                        break;
+                    case Frame.ITEM_ASM_CHAR:
+                        typeDescriptor.append('C');
+                        break;
+                    case Frame.ITEM_ASM_SHORT:
+                        typeDescriptor.append('S');
+                        break;
+                    case Frame.ITEM_INTEGER:
+                        typeDescriptor.append('I');
+                        break;
+                    case Frame.ITEM_FLOAT:
+                        typeDescriptor.append('F');
+                        break;
+                    case Frame.ITEM_LONG:
+                        typeDescriptor.append('J');
+                        break;
+                    case Frame.ITEM_DOUBLE:
+                        typeDescriptor.append('D');
+                        break;
+                    default:
+                        throw new AssertionError();
+                }
+            }
+            output
+                    .putByte(ITEM_OBJECT)
+                    .putShort(symbolTable.addConstantClass(typeDescriptor.toString()).index);
+        }
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/org/objectweb/asm/Handle.class b/tests/test_data/std/jdk/internal/org/objectweb/asm/Handle.class
new file mode 100644
index 0000000000000000000000000000000000000000..049552129f3df7df080470b91140c82f580085cd
GIT binary patch
literal 2280
zcmbVOT~ixX7=BLJd=R!YrcG)DF}0Q^3nA9luR@U)EJXRJ1(}iFbO~En2pbHGjF*02
zdE<Cf#|v(>H%v!o1ZMoKI_iv5^#}M@9PxQ~V+b^A#~F6d`<^}Td7tM!&wIkpe}4Wo
zfI++%MnIu+ac(JZJFZo6%u>Ewna`JJ7p<bZZq4S+)#d!eO0hg=twy0C7)D4(7!ie&
z{}DA}I&&pUA=GC(w%f1Jn<<Pgny;AolIhInC*6we%=g~Q%uIGViYQvb&?WaFh1lLc
z6CPBBrc8FanFtT-h~Yl^t~sxu3Nm*@$5A8{g5`C`swl+o&MM1}>9}8(X^y#U$;1OX
z+GHY1_Qi_5;+88i{h*ExJfzTKuNI_g*Uch%s+lN`<KZw)=y(Jt_kr}uvKH3MYi4Ox
zA(5$r;8W<$dK;Y5kwI1=vS6+*46^PXwL%zO3di<n`#WA-vrBVUB?<#A^6Jr%$D_<+
zuB=$joI<WXPqpOPy43r&>6I-WlP%6Dv}XqYd0_;PD+JOR33yTho|1sVzXhCQUDLLE
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zS(-L0w)oXa&0Vm0KBq?SN!`SDXwo%{OJn9rb%W@TwNkN)rfaeMsVi%aYcE^V_NvVs
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aTn8$Nz^h>xyUgvwqQm=u?j&~zVCpZh0;CE6

literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/org/objectweb/asm/Handle.java b/tests/test_data/std/jdk/internal/org/objectweb/asm/Handle.java
new file mode 100644
index 00000000..7e5a9e1a
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/org/objectweb/asm/Handle.java
@@ -0,0 +1,221 @@
+/*
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/*
+ * This file is available under and governed by the GNU General Public
+ * License version 2 only, as published by the Free Software Foundation.
+ * However, the following notice accompanied the original version of this
+ * file:
+ *
+ * ASM: a very small and fast Java bytecode manipulation framework
+ * Copyright (c) 2000-2011 INRIA, France Telecom
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the copyright holders nor the names of its
+ *    contributors may be used to endorse or promote products derived from
+ *    this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+package jdk.internal.org.objectweb.asm;
+
+/**
+ * A reference to a field or a method.
+ *
+ * @author Remi Forax
+ * @author Eric Bruneton
+ */
+public final class Handle {
+
+    /**
+      * The kind of field or method designated by this Handle. Should be {@link Opcodes#H_GETFIELD},
+      * {@link Opcodes#H_GETSTATIC}, {@link Opcodes#H_PUTFIELD}, {@link Opcodes#H_PUTSTATIC}, {@link
+      * Opcodes#H_INVOKEVIRTUAL}, {@link Opcodes#H_INVOKESTATIC}, {@link Opcodes#H_INVOKESPECIAL},
+      * {@link Opcodes#H_NEWINVOKESPECIAL} or {@link Opcodes#H_INVOKEINTERFACE}.
+      */
+    private final int tag;
+
+    /** The internal name of the class that owns the field or method designated by this handle. */
+    private final String owner;
+
+    /** The name of the field or method designated by this handle. */
+    private final String name;
+
+    /** The descriptor of the field or method designated by this handle. */
+    private final String descriptor;
+
+    /** Whether the owner is an interface or not. */
+    private final boolean isInterface;
+
+    /**
+      * Constructs a new field or method handle.
+      *
+      * @param tag the kind of field or method designated by this Handle. Must be {@link
+      *     Opcodes#H_GETFIELD}, {@link Opcodes#H_GETSTATIC}, {@link Opcodes#H_PUTFIELD}, {@link
+      *     Opcodes#H_PUTSTATIC}, {@link Opcodes#H_INVOKEVIRTUAL}, {@link Opcodes#H_INVOKESTATIC},
+      *     {@link Opcodes#H_INVOKESPECIAL}, {@link Opcodes#H_NEWINVOKESPECIAL} or {@link
+      *     Opcodes#H_INVOKEINTERFACE}.
+      * @param owner the internal name of the class that owns the field or method designated by this
+      *     handle (see {@link Type#getInternalName()}).
+      * @param name the name of the field or method designated by this handle.
+      * @param descriptor the descriptor of the field or method designated by this handle.
+      * @deprecated this constructor has been superseded by {@link #Handle(int, String, String, String,
+      *     boolean)}.
+      */
+    @Deprecated
+    public Handle(final int tag, final String owner, final String name, final String descriptor) {
+        this(tag, owner, name, descriptor, tag == Opcodes.H_INVOKEINTERFACE);
+    }
+
+    /**
+      * Constructs a new field or method handle.
+      *
+      * @param tag the kind of field or method designated by this Handle. Must be {@link
+      *     Opcodes#H_GETFIELD}, {@link Opcodes#H_GETSTATIC}, {@link Opcodes#H_PUTFIELD}, {@link
+      *     Opcodes#H_PUTSTATIC}, {@link Opcodes#H_INVOKEVIRTUAL}, {@link Opcodes#H_INVOKESTATIC},
+      *     {@link Opcodes#H_INVOKESPECIAL}, {@link Opcodes#H_NEWINVOKESPECIAL} or {@link
+      *     Opcodes#H_INVOKEINTERFACE}.
+      * @param owner the internal name of the class that owns the field or method designated by this
+      *     handle (see {@link Type#getInternalName()}).
+      * @param name the name of the field or method designated by this handle.
+      * @param descriptor the descriptor of the field or method designated by this handle.
+      * @param isInterface whether the owner is an interface or not.
+      */
+    public Handle(
+            final int tag,
+            final String owner,
+            final String name,
+            final String descriptor,
+            final boolean isInterface) {
+        this.tag = tag;
+        this.owner = owner;
+        this.name = name;
+        this.descriptor = descriptor;
+        this.isInterface = isInterface;
+    }
+
+    /**
+      * Returns the kind of field or method designated by this handle.
+      *
+      * @return {@link Opcodes#H_GETFIELD}, {@link Opcodes#H_GETSTATIC}, {@link Opcodes#H_PUTFIELD},
+      *     {@link Opcodes#H_PUTSTATIC}, {@link Opcodes#H_INVOKEVIRTUAL}, {@link
+      *     Opcodes#H_INVOKESTATIC}, {@link Opcodes#H_INVOKESPECIAL}, {@link
+      *     Opcodes#H_NEWINVOKESPECIAL} or {@link Opcodes#H_INVOKEINTERFACE}.
+      */
+    public int getTag() {
+        return tag;
+    }
+
+    /**
+      * Returns the internal name of the class that owns the field or method designated by this handle.
+      *
+      * @return the internal name of the class that owns the field or method designated by this handle
+      *     (see {@link Type#getInternalName()}).
+      */
+    public String getOwner() {
+        return owner;
+    }
+
+    /**
+      * Returns the name of the field or method designated by this handle.
+      *
+      * @return the name of the field or method designated by this handle.
+      */
+    public String getName() {
+        return name;
+    }
+
+    /**
+      * Returns the descriptor of the field or method designated by this handle.
+      *
+      * @return the descriptor of the field or method designated by this handle.
+      */
+    public String getDesc() {
+        return descriptor;
+    }
+
+    /**
+      * Returns true if the owner of the field or method designated by this handle is an interface.
+      *
+      * @return true if the owner of the field or method designated by this handle is an interface.
+      */
+    public boolean isInterface() {
+        return isInterface;
+    }
+
+    @Override
+    public boolean equals(final Object object) {
+        if (object == this) {
+            return true;
+        }
+        if (!(object instanceof Handle)) {
+            return false;
+        }
+        Handle handle = (Handle) object;
+        return tag == handle.tag
+                && isInterface == handle.isInterface
+                && owner.equals(handle.owner)
+                && name.equals(handle.name)
+                && descriptor.equals(handle.descriptor);
+    }
+
+    @Override
+    public int hashCode() {
+        return tag
+                + (isInterface ? 64 : 0)
+                + owner.hashCode() * name.hashCode() * descriptor.hashCode();
+    }
+
+    /**
+      * Returns the textual representation of this handle. The textual representation is:
+      *
+      * <ul>
+      *   <li>for a reference to a class: owner "." name descriptor " (" tag ")",
+      *   <li>for a reference to an interface: owner "." name descriptor " (" tag " itf)".
+      * </ul>
+      */
+    @Override
+    public String toString() {
+        return owner + '.' + name + descriptor + " (" + tag + (isInterface ? " itf" : "") + ')';
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/org/objectweb/asm/Handler.class b/tests/test_data/std/jdk/internal/org/objectweb/asm/Handler.class
new file mode 100644
index 0000000000000000000000000000000000000000..cd586df91d8b9adc773f6f5f23b1580fb7d073df
GIT binary patch
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z9Sns{2PO~Zie=Y!%2p{?ai($=ed>rkk+WtF<p!+sWXX0EqBE}LxTAR<8LDw+$eOTA
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z=Gytnq`i0l{u$eiBCF7_-0VS4?3C>UPb@7hNyl^2@vRC+{-0Wm3x;k3w_uw>^OWuG
zKAN|u-D0J@&zdONLw0$}EhuDGjjn4jf$g|0irWp`fjbqtYLsmU%Qep1F1I2!J?oAY
zDh{vymd?SNjaok1qY&E3nk%dsDwge$*+Ubyqcf1JR>@nXamy)6M!quS7K$_E2LCcE
z82gLP%<^=HHEED|c>ihiw~YytC?x#P-C|2PGR(dura!d4o~r!8VQbot7%BO+OkYvu
zvEp$eZ(#B(tFJJ=>bln&>dR`?HBM%&%({%n&i;pkOm?g?>*Vb{#S#G<{zcg$(~Yeh
zqyULMf|L+6rIb*pUP+vKB~|K`#K;vwD||=zkoBO@L+NFD5ly?f2xVp#5H+(4s5dt+
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zr6oZr$lHbB5!8|(4QWZRhAHuua=#!vNMB-WF|(U9XOZI5#HV?Y8m?^%Xj=xC)DEAg
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zJ&R3!T<f`R4-v_x?cwZs#2PoBK{P9$k#sm6I)!*T(s~+Ub3PsB+M14}LvJA_-sV3;
z>|rx2P8P9c-m^4lr3A=`(p<5Jp;wxTFR0tH2Mv^8VXm(d_iJp)>&)sT^Lc}W`X<@o
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zaP~VSpH+$lY#Tna^jFLK)eJY#AMgc-=Syb!6<vJI{(VFL-)hwDo)aH+fcgPqAXTw4
z((!;s!{4C45mHgalJqcG1+k5%WhN5gRLnewn+uOgWN+jn+Hyfh@y0meM~UG++)t|v
z>O6N#8vPkL{|Rn=NN3ZXVJ<Q()KHRf@uXB$YLd-<#usFmy_T9tQ2v3p>_;a06G!xC
zG~*Yh@+&g<4c+*i<o^c;`_Ib?&|hs^KZY<&aCJ;_xd3qlE~1Y4chfY&00Hd%2U#a=
Aga7~l

literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/org/objectweb/asm/Handler.java b/tests/test_data/std/jdk/internal/org/objectweb/asm/Handler.java
new file mode 100644
index 00000000..3d86e222
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/org/objectweb/asm/Handler.java
@@ -0,0 +1,230 @@
+/*
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/*
+ * This file is available under and governed by the GNU General Public
+ * License version 2 only, as published by the Free Software Foundation.
+ * However, the following notice accompanied the original version of this
+ * file:
+ *
+ * ASM: a very small and fast Java bytecode manipulation framework
+ * Copyright (c) 2000-2011 INRIA, France Telecom
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the copyright holders nor the names of its
+ *    contributors may be used to endorse or promote products derived from
+ *    this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+package jdk.internal.org.objectweb.asm;
+
+/**
+ * Information about an exception handler. Corresponds to an element of the exception_table array of
+ * a Code attribute, as defined in the Java Virtual Machine Specification (JVMS). Handler instances
+ * can be chained together, with their {@link #nextHandler} field, to describe a full JVMS
+ * exception_table array.
+ *
+ * @see <a href="https://docs.oracle.com/javase/specs/jvms/se9/html/jvms-4.html#jvms-4.7.3">JVMS
+ *     4.7.3</a>
+ * @author Eric Bruneton
+ */
+final class Handler {
+
+    /**
+      * The start_pc field of this JVMS exception_table entry. Corresponds to the beginning of the
+      * exception handler's scope (inclusive).
+      */
+    final Label startPc;
+
+    /**
+      * The end_pc field of this JVMS exception_table entry. Corresponds to the end of the exception
+      * handler's scope (exclusive).
+      */
+    final Label endPc;
+
+    /**
+      * The handler_pc field of this JVMS exception_table entry. Corresponding to the beginning of the
+      * exception handler's code.
+      */
+    final Label handlerPc;
+
+    /**
+      * The catch_type field of this JVMS exception_table entry. This is the constant pool index of the
+      * internal name of the type of exceptions handled by this handler, or 0 to catch any exceptions.
+      */
+    final int catchType;
+
+    /**
+      * The internal name of the type of exceptions handled by this handler, or {@literal null} to
+      * catch any exceptions.
+      */
+    final String catchTypeDescriptor;
+
+    /** The next exception handler. */
+    Handler nextHandler;
+
+    /**
+      * Constructs a new Handler.
+      *
+      * @param startPc the start_pc field of this JVMS exception_table entry.
+      * @param endPc the end_pc field of this JVMS exception_table entry.
+      * @param handlerPc the handler_pc field of this JVMS exception_table entry.
+      * @param catchType The catch_type field of this JVMS exception_table entry.
+      * @param catchTypeDescriptor The internal name of the type of exceptions handled by this handler,
+      *     or {@literal null} to catch any exceptions.
+      */
+    Handler(
+            final Label startPc,
+            final Label endPc,
+            final Label handlerPc,
+            final int catchType,
+            final String catchTypeDescriptor) {
+        this.startPc = startPc;
+        this.endPc = endPc;
+        this.handlerPc = handlerPc;
+        this.catchType = catchType;
+        this.catchTypeDescriptor = catchTypeDescriptor;
+    }
+
+    /**
+      * Constructs a new Handler from the given one, with a different scope.
+      *
+      * @param handler an existing Handler.
+      * @param startPc the start_pc field of this JVMS exception_table entry.
+      * @param endPc the end_pc field of this JVMS exception_table entry.
+      */
+    Handler(final Handler handler, final Label startPc, final Label endPc) {
+        this(startPc, endPc, handler.handlerPc, handler.catchType, handler.catchTypeDescriptor);
+        this.nextHandler = handler.nextHandler;
+    }
+
+    /**
+      * Removes the range between start and end from the Handler list that begins with the given
+      * element.
+      *
+      * @param firstHandler the beginning of a Handler list. May be {@literal null}.
+      * @param start the start of the range to be removed.
+      * @param end the end of the range to be removed. Maybe {@literal null}.
+      * @return the exception handler list with the start-end range removed.
+      */
+    static Handler removeRange(final Handler firstHandler, final Label start, final Label end) {
+        if (firstHandler == null) {
+            return null;
+        } else {
+            firstHandler.nextHandler = removeRange(firstHandler.nextHandler, start, end);
+        }
+        int handlerStart = firstHandler.startPc.bytecodeOffset;
+        int handlerEnd = firstHandler.endPc.bytecodeOffset;
+        int rangeStart = start.bytecodeOffset;
+        int rangeEnd = end == null ? Integer.MAX_VALUE : end.bytecodeOffset;
+        // Return early if [handlerStart,handlerEnd[ and [rangeStart,rangeEnd[ don't intersect.
+        if (rangeStart >= handlerEnd || rangeEnd <= handlerStart) {
+            return firstHandler;
+        }
+        if (rangeStart <= handlerStart) {
+            if (rangeEnd >= handlerEnd) {
+                // If [handlerStart,handlerEnd[ is included in [rangeStart,rangeEnd[, remove firstHandler.
+                return firstHandler.nextHandler;
+            } else {
+                // [handlerStart,handlerEnd[ - [rangeStart,rangeEnd[ = [rangeEnd,handlerEnd[
+                return new Handler(firstHandler, end, firstHandler.endPc);
+            }
+        } else if (rangeEnd >= handlerEnd) {
+            // [handlerStart,handlerEnd[ - [rangeStart,rangeEnd[ = [handlerStart,rangeStart[
+            return new Handler(firstHandler, firstHandler.startPc, start);
+        } else {
+            // [handlerStart,handlerEnd[ - [rangeStart,rangeEnd[ =
+            //     [handlerStart,rangeStart[ + [rangeEnd,handerEnd[
+            firstHandler.nextHandler = new Handler(firstHandler, end, firstHandler.endPc);
+            return new Handler(firstHandler, firstHandler.startPc, start);
+        }
+    }
+
+    /**
+      * Returns the number of elements of the Handler list that begins with the given element.
+      *
+      * @param firstHandler the beginning of a Handler list. May be {@literal null}.
+      * @return the number of elements of the Handler list that begins with 'handler'.
+      */
+    static int getExceptionTableLength(final Handler firstHandler) {
+        int length = 0;
+        Handler handler = firstHandler;
+        while (handler != null) {
+            length++;
+            handler = handler.nextHandler;
+        }
+        return length;
+    }
+
+    /**
+      * Returns the size in bytes of the JVMS exception_table corresponding to the Handler list that
+      * begins with the given element. <i>This includes the exception_table_length field.</i>
+      *
+      * @param firstHandler the beginning of a Handler list. May be {@literal null}.
+      * @return the size in bytes of the exception_table_length and exception_table structures.
+      */
+    static int getExceptionTableSize(final Handler firstHandler) {
+        return 2 + 8 * getExceptionTableLength(firstHandler);
+    }
+
+    /**
+      * Puts the JVMS exception_table corresponding to the Handler list that begins with the given
+      * element. <i>This includes the exception_table_length field.</i>
+      *
+      * @param firstHandler the beginning of a Handler list. May be {@literal null}.
+      * @param output where the exception_table_length and exception_table structures must be put.
+      */
+    static void putExceptionTable(final Handler firstHandler, final ByteVector output) {
+        output.putShort(getExceptionTableLength(firstHandler));
+        Handler handler = firstHandler;
+        while (handler != null) {
+            output
+                    .putShort(handler.startPc.bytecodeOffset)
+                    .putShort(handler.endPc.bytecodeOffset)
+                    .putShort(handler.handlerPc.bytecodeOffset)
+                    .putShort(handler.catchType);
+            handler = handler.nextHandler;
+        }
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/org/objectweb/asm/Label.class b/tests/test_data/std/jdk/internal/org/objectweb/asm/Label.class
new file mode 100644
index 0000000000000000000000000000000000000000..04f693a3078c672b56ddd98aad6d3ea2c946d908
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diff --git a/tests/test_data/std/jdk/internal/org/objectweb/asm/Label.java b/tests/test_data/std/jdk/internal/org/objectweb/asm/Label.java
new file mode 100644
index 00000000..c321fc8a
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/org/objectweb/asm/Label.java
@@ -0,0 +1,686 @@
+/*
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/*
+ * This file is available under and governed by the GNU General Public
+ * License version 2 only, as published by the Free Software Foundation.
+ * However, the following notice accompanied the original version of this
+ * file:
+ *
+ * ASM: a very small and fast Java bytecode manipulation framework
+ * Copyright (c) 2000-2011 INRIA, France Telecom
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the copyright holders nor the names of its
+ *    contributors may be used to endorse or promote products derived from
+ *    this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+package jdk.internal.org.objectweb.asm;
+
+/**
+ * A position in the bytecode of a method. Labels are used for jump, goto, and switch instructions,
+ * and for try catch blocks. A label designates the <i>instruction</i> that is just after. Note
+ * however that there can be other elements between a label and the instruction it designates (such
+ * as other labels, stack map frames, line numbers, etc.).
+ *
+ * @author Eric Bruneton
+ */
+public class Label {
+
+    /**
+      * A flag indicating that a label is only used for debug attributes. Such a label is not the start
+      * of a basic block, the target of a jump instruction, or an exception handler. It can be safely
+      * ignored in control flow graph analysis algorithms (for optimization purposes).
+      */
+    static final int FLAG_DEBUG_ONLY = 1;
+
+    /**
+      * A flag indicating that a label is the target of a jump instruction, or the start of an
+      * exception handler.
+      */
+    static final int FLAG_JUMP_TARGET = 2;
+
+    /** A flag indicating that the bytecode offset of a label is known. */
+    static final int FLAG_RESOLVED = 4;
+
+    /** A flag indicating that a label corresponds to a reachable basic block. */
+    static final int FLAG_REACHABLE = 8;
+
+    /**
+      * A flag indicating that the basic block corresponding to a label ends with a subroutine call. By
+      * construction in {@link MethodWriter#visitJumpInsn}, labels with this flag set have at least two
+      * outgoing edges:
+      *
+      * <ul>
+      *   <li>the first one corresponds to the instruction that follows the jsr instruction in the
+      *       bytecode, i.e. where execution continues when it returns from the jsr call. This is a
+      *       virtual control flow edge, since execution never goes directly from the jsr to the next
+      *       instruction. Instead, it goes to the subroutine and eventually returns to the instruction
+      *       following the jsr. This virtual edge is used to compute the real outgoing edges of the
+      *       basic blocks ending with a ret instruction, in {@link #addSubroutineRetSuccessors}.
+      *   <li>the second one corresponds to the target of the jsr instruction,
+      * </ul>
+      */
+    static final int FLAG_SUBROUTINE_CALLER = 16;
+
+    /**
+      * A flag indicating that the basic block corresponding to a label is the start of a subroutine.
+      */
+    static final int FLAG_SUBROUTINE_START = 32;
+
+    /** A flag indicating that the basic block corresponding to a label is the end of a subroutine. */
+    static final int FLAG_SUBROUTINE_END = 64;
+
+    /** A flag indicating that this label has at least one associated line number. */
+    static final int FLAG_LINE_NUMBER = 128;
+
+    /**
+      * The number of elements to add to the {@link #otherLineNumbers} array when it needs to be
+      * resized to store a new source line number.
+      */
+    static final int LINE_NUMBERS_CAPACITY_INCREMENT = 4;
+
+    /**
+      * The number of elements to add to the {@link #forwardReferences} array when it needs to be
+      * resized to store a new forward reference.
+      */
+    static final int FORWARD_REFERENCES_CAPACITY_INCREMENT = 6;
+
+    /**
+      * The bit mask to extract the type of a forward reference to this label. The extracted type is
+      * either {@link #FORWARD_REFERENCE_TYPE_SHORT} or {@link #FORWARD_REFERENCE_TYPE_WIDE}.
+      *
+      * @see #forwardReferences
+      */
+    static final int FORWARD_REFERENCE_TYPE_MASK = 0xF0000000;
+
+    /**
+      * The type of forward references stored with two bytes in the bytecode. This is the case, for
+      * instance, of a forward reference from an ifnull instruction.
+      */
+    static final int FORWARD_REFERENCE_TYPE_SHORT = 0x10000000;
+
+    /**
+      * The type of forward references stored in four bytes in the bytecode. This is the case, for
+      * instance, of a forward reference from a lookupswitch instruction.
+      */
+    static final int FORWARD_REFERENCE_TYPE_WIDE = 0x20000000;
+
+    /**
+      * The type of forward references stored in two bytes in the <i>stack map table</i>. This is the
+      * case of the labels of {@link Frame#ITEM_UNINITIALIZED} stack map frame elements, when the NEW
+      * instruction is after the &lt;init&gt; constructor call (in bytecode offset order).
+      */
+    static final int FORWARD_REFERENCE_TYPE_STACK_MAP = 0x30000000;
+
+    /**
+      * The bit mask to extract the 'handle' of a forward reference to this label. The extracted handle
+      * is the bytecode offset where the forward reference value is stored (using either 2 or 4 bytes,
+      * as indicated by the {@link #FORWARD_REFERENCE_TYPE_MASK}).
+      *
+      * @see #forwardReferences
+      */
+    static final int FORWARD_REFERENCE_HANDLE_MASK = 0x0FFFFFFF;
+
+    /**
+      * A sentinel element used to indicate the end of a list of labels.
+      *
+      * @see #nextListElement
+      */
+    static final Label EMPTY_LIST = new Label();
+
+    /**
+      * A user managed state associated with this label. Warning: this field is used by the ASM tree
+      * package. In order to use it with the ASM tree package you must override the getLabelNode method
+      * in MethodNode.
+      */
+    public Object info;
+
+    /**
+      * The type and status of this label or its corresponding basic block. Must be zero or more of
+      * {@link #FLAG_DEBUG_ONLY}, {@link #FLAG_JUMP_TARGET}, {@link #FLAG_RESOLVED}, {@link
+      * #FLAG_REACHABLE}, {@link #FLAG_SUBROUTINE_CALLER}, {@link #FLAG_SUBROUTINE_START}, {@link
+      * #FLAG_SUBROUTINE_END}.
+      */
+    short flags;
+
+    /**
+      * The source line number corresponding to this label, if {@link #FLAG_LINE_NUMBER} is set. If
+      * there are several source line numbers corresponding to this label, the first one is stored in
+      * this field, and the remaining ones are stored in {@link #otherLineNumbers}.
+      */
+    private short lineNumber;
+
+    /**
+      * The source line numbers corresponding to this label, in addition to {@link #lineNumber}, or
+      * null. The first element of this array is the number n of source line numbers it contains, which
+      * are stored between indices 1 and n (inclusive).
+      */
+    private int[] otherLineNumbers;
+
+    /**
+      * The offset of this label in the bytecode of its method, in bytes. This value is set if and only
+      * if the {@link #FLAG_RESOLVED} flag is set.
+      */
+    int bytecodeOffset;
+
+    /**
+      * The forward references to this label. The first element is the number of forward references,
+      * times 2 (this corresponds to the index of the last element actually used in this array). Then,
+      * each forward reference is described with two consecutive integers noted
+      * 'sourceInsnBytecodeOffset' and 'reference':
+      *
+      * <ul>
+      *   <li>'sourceInsnBytecodeOffset' is the bytecode offset of the instruction that contains the
+      *       forward reference,
+      *   <li>'reference' contains the type and the offset in the bytecode where the forward reference
+      *       value must be stored, which can be extracted with {@link #FORWARD_REFERENCE_TYPE_MASK}
+      *       and {@link #FORWARD_REFERENCE_HANDLE_MASK}.
+      * </ul>
+      *
+      * <p>For instance, for an ifnull instruction at bytecode offset x, 'sourceInsnBytecodeOffset' is
+      * equal to x, and 'reference' is of type {@link #FORWARD_REFERENCE_TYPE_SHORT} with value x + 1
+      * (because the ifnull instruction uses a 2 bytes bytecode offset operand stored one byte after
+      * the start of the instruction itself). For the default case of a lookupswitch instruction at
+      * bytecode offset x, 'sourceInsnBytecodeOffset' is equal to x, and 'reference' is of type {@link
+      * #FORWARD_REFERENCE_TYPE_WIDE} with value between x + 1 and x + 4 (because the lookupswitch
+      * instruction uses a 4 bytes bytecode offset operand stored one to four bytes after the start of
+      * the instruction itself).
+      */
+    private int[] forwardReferences;
+
+    // -----------------------------------------------------------------------------------------------
+
+    // Fields for the control flow and data flow graph analysis algorithms (used to compute the
+    // maximum stack size or the stack map frames). A control flow graph contains one node per "basic
+    // block", and one edge per "jump" from one basic block to another. Each node (i.e., each basic
+    // block) is represented with the Label object that corresponds to the first instruction of this
+    // basic block. Each node also stores the list of its successors in the graph, as a linked list of
+    // Edge objects.
+    //
+    // The control flow analysis algorithms used to compute the maximum stack size or the stack map
+    // frames are similar and use two steps. The first step, during the visit of each instruction,
+    // builds information about the state of the local variables and the operand stack at the end of
+    // each basic block, called the "output frame", <i>relatively</i> to the frame state at the
+    // beginning of the basic block, which is called the "input frame", and which is <i>unknown</i>
+    // during this step. The second step, in {@link MethodWriter#computeAllFrames} and {@link
+    // MethodWriter#computeMaxStackAndLocal}, is a fix point algorithm
+    // that computes information about the input frame of each basic block, from the input state of
+    // the first basic block (known from the method signature), and by the using the previously
+    // computed relative output frames.
+    //
+    // The algorithm used to compute the maximum stack size only computes the relative output and
+    // absolute input stack heights, while the algorithm used to compute stack map frames computes
+    // relative output frames and absolute input frames.
+
+    /**
+      * The number of elements in the input stack of the basic block corresponding to this label. This
+      * field is computed in {@link MethodWriter#computeMaxStackAndLocal}.
+      */
+    short inputStackSize;
+
+    /**
+      * The number of elements in the output stack, at the end of the basic block corresponding to this
+      * label. This field is only computed for basic blocks that end with a RET instruction.
+      */
+    short outputStackSize;
+
+    /**
+      * The maximum height reached by the output stack, relatively to the top of the input stack, in
+      * the basic block corresponding to this label. This maximum is always positive or {@literal
+      * null}.
+      */
+    short outputStackMax;
+
+    /**
+      * The id of the subroutine to which this basic block belongs, or 0. If the basic block belongs to
+      * several subroutines, this is the id of the "oldest" subroutine that contains it (with the
+      * convention that a subroutine calling another one is "older" than the callee). This field is
+      * computed in {@link MethodWriter#computeMaxStackAndLocal}, if the method contains JSR
+      * instructions.
+      */
+    short subroutineId;
+
+    /**
+      * The input and output stack map frames of the basic block corresponding to this label. This
+      * field is only used when the {@link MethodWriter#COMPUTE_ALL_FRAMES} or {@link
+      * MethodWriter#COMPUTE_INSERTED_FRAMES} option is used.
+      */
+    Frame frame;
+
+    /**
+      * The successor of this label, in the order they are visited in {@link MethodVisitor#visitLabel}.
+      * This linked list does not include labels used for debug info only. If the {@link
+      * MethodWriter#COMPUTE_ALL_FRAMES} or {@link MethodWriter#COMPUTE_INSERTED_FRAMES} option is used
+      * then it does not contain either successive labels that denote the same bytecode offset (in this
+      * case only the first label appears in this list).
+      */
+    Label nextBasicBlock;
+
+    /**
+      * The outgoing edges of the basic block corresponding to this label, in the control flow graph of
+      * its method. These edges are stored in a linked list of {@link Edge} objects, linked to each
+      * other by their {@link Edge#nextEdge} field.
+      */
+    Edge outgoingEdges;
+
+    /**
+      * The next element in the list of labels to which this label belongs, or {@literal null} if it
+      * does not belong to any list. All lists of labels must end with the {@link #EMPTY_LIST}
+      * sentinel, in order to ensure that this field is null if and only if this label does not belong
+      * to a list of labels. Note that there can be several lists of labels at the same time, but that
+      * a label can belong to at most one list at a time (unless some lists share a common tail, but
+      * this is not used in practice).
+      *
+      * <p>List of labels are used in {@link MethodWriter#computeAllFrames} and {@link
+      * MethodWriter#computeMaxStackAndLocal} to compute stack map frames and the maximum stack size,
+      * respectively, as well as in {@link #markSubroutine} and {@link #addSubroutineRetSuccessors} to
+      * compute the basic blocks belonging to subroutines and their outgoing edges. Outside of these
+      * methods, this field should be null (this property is a precondition and a postcondition of
+      * these methods).
+      */
+    Label nextListElement;
+
+    // -----------------------------------------------------------------------------------------------
+    // Constructor and accessors
+    // -----------------------------------------------------------------------------------------------
+
+    /** Constructs a new label. */
+    public Label() {
+        // Nothing to do.
+    }
+
+    /**
+      * Returns the bytecode offset corresponding to this label. This offset is computed from the start
+      * of the method's bytecode. <i>This method is intended for {@link Attribute} sub classes, and is
+      * normally not needed by class generators or adapters.</i>
+      *
+      * @return the bytecode offset corresponding to this label.
+      * @throws IllegalStateException if this label is not resolved yet.
+      */
+    public int getOffset() {
+        if ((flags & FLAG_RESOLVED) == 0) {
+            throw new IllegalStateException("Label offset position has not been resolved yet");
+        }
+        return bytecodeOffset;
+    }
+
+    /**
+      * Returns the "canonical" {@link Label} instance corresponding to this label's bytecode offset,
+      * if known, otherwise the label itself. The canonical instance is the first label (in the order
+      * of their visit by {@link MethodVisitor#visitLabel}) corresponding to this bytecode offset. It
+      * cannot be known for labels which have not been visited yet.
+      *
+      * <p><i>This method should only be used when the {@link MethodWriter#COMPUTE_ALL_FRAMES} option
+      * is used.</i>
+      *
+      * @return the label itself if {@link #frame} is null, otherwise the Label's frame owner. This
+      *     corresponds to the "canonical" label instance described above thanks to the way the label
+      *     frame is set in {@link MethodWriter#visitLabel}.
+      */
+    final Label getCanonicalInstance() {
+        return frame == null ? this : frame.owner;
+    }
+
+    // -----------------------------------------------------------------------------------------------
+    // Methods to manage line numbers
+    // -----------------------------------------------------------------------------------------------
+
+    /**
+      * Adds a source line number corresponding to this label.
+      *
+      * @param lineNumber a source line number (which should be strictly positive).
+      */
+    final void addLineNumber(final int lineNumber) {
+        if ((flags & FLAG_LINE_NUMBER) == 0) {
+            flags |= FLAG_LINE_NUMBER;
+            this.lineNumber = (short) lineNumber;
+        } else {
+            if (otherLineNumbers == null) {
+                otherLineNumbers = new int[LINE_NUMBERS_CAPACITY_INCREMENT];
+            }
+            int otherLineNumberIndex = ++otherLineNumbers[0];
+            if (otherLineNumberIndex >= otherLineNumbers.length) {
+                int[] newLineNumbers = new int[otherLineNumbers.length + LINE_NUMBERS_CAPACITY_INCREMENT];
+                System.arraycopy(otherLineNumbers, 0, newLineNumbers, 0, otherLineNumbers.length);
+                otherLineNumbers = newLineNumbers;
+            }
+            otherLineNumbers[otherLineNumberIndex] = lineNumber;
+        }
+    }
+
+    /**
+      * Makes the given visitor visit this label and its source line numbers, if applicable.
+      *
+      * @param methodVisitor a method visitor.
+      * @param visitLineNumbers whether to visit of the label's source line numbers, if any.
+      */
+    final void accept(final MethodVisitor methodVisitor, final boolean visitLineNumbers) {
+        methodVisitor.visitLabel(this);
+        if (visitLineNumbers && (flags & FLAG_LINE_NUMBER) != 0) {
+            methodVisitor.visitLineNumber(lineNumber & 0xFFFF, this);
+            if (otherLineNumbers != null) {
+                for (int i = 1; i <= otherLineNumbers[0]; ++i) {
+                    methodVisitor.visitLineNumber(otherLineNumbers[i], this);
+                }
+            }
+        }
+    }
+
+    // -----------------------------------------------------------------------------------------------
+    // Methods to compute offsets and to manage forward references
+    // -----------------------------------------------------------------------------------------------
+
+    /**
+      * Puts a reference to this label in the bytecode of a method. If the bytecode offset of the label
+      * is known, the relative bytecode offset between the label and the instruction referencing it is
+      * computed and written directly. Otherwise, a null relative offset is written and a new forward
+      * reference is declared for this label.
+      *
+      * @param code the bytecode of the method. This is where the reference is appended.
+      * @param sourceInsnBytecodeOffset the bytecode offset of the instruction that contains the
+      *     reference to be appended.
+      * @param wideReference whether the reference must be stored in 4 bytes (instead of 2 bytes).
+      */
+    final void put(
+            final ByteVector code, final int sourceInsnBytecodeOffset, final boolean wideReference) {
+        if ((flags & FLAG_RESOLVED) == 0) {
+            if (wideReference) {
+                addForwardReference(sourceInsnBytecodeOffset, FORWARD_REFERENCE_TYPE_WIDE, code.length);
+                code.putInt(-1);
+            } else {
+                addForwardReference(sourceInsnBytecodeOffset, FORWARD_REFERENCE_TYPE_SHORT, code.length);
+                code.putShort(-1);
+            }
+        } else {
+            if (wideReference) {
+                code.putInt(bytecodeOffset - sourceInsnBytecodeOffset);
+            } else {
+                code.putShort(bytecodeOffset - sourceInsnBytecodeOffset);
+            }
+        }
+    }
+
+    /**
+      * Puts a reference to this label in the <i>stack map table</i> of a method. If the bytecode
+      * offset of the label is known, it is written directly. Otherwise, a null relative offset is
+      * written and a new forward reference is declared for this label.
+      *
+      * @param stackMapTableEntries the stack map table where the label offset must be added.
+      */
+    final void put(final ByteVector stackMapTableEntries) {
+        if ((flags & FLAG_RESOLVED) == 0) {
+            addForwardReference(0, FORWARD_REFERENCE_TYPE_STACK_MAP, stackMapTableEntries.length);
+        }
+        stackMapTableEntries.putShort(bytecodeOffset);
+    }
+
+    /**
+      * Adds a forward reference to this label. This method must be called only for a true forward
+      * reference, i.e. only if this label is not resolved yet. For backward references, the relative
+      * bytecode offset of the reference can be, and must be, computed and stored directly.
+      *
+      * @param sourceInsnBytecodeOffset the bytecode offset of the instruction that contains the
+      *     reference stored at referenceHandle.
+      * @param referenceType either {@link #FORWARD_REFERENCE_TYPE_SHORT} or {@link
+      *     #FORWARD_REFERENCE_TYPE_WIDE}.
+      * @param referenceHandle the offset in the bytecode where the forward reference value must be
+      *     stored.
+      */
+    private void addForwardReference(
+            final int sourceInsnBytecodeOffset, final int referenceType, final int referenceHandle) {
+        if (forwardReferences == null) {
+            forwardReferences = new int[FORWARD_REFERENCES_CAPACITY_INCREMENT];
+        }
+        int lastElementIndex = forwardReferences[0];
+        if (lastElementIndex + 2 >= forwardReferences.length) {
+            int[] newValues = new int[forwardReferences.length + FORWARD_REFERENCES_CAPACITY_INCREMENT];
+            System.arraycopy(forwardReferences, 0, newValues, 0, forwardReferences.length);
+            forwardReferences = newValues;
+        }
+        forwardReferences[++lastElementIndex] = sourceInsnBytecodeOffset;
+        forwardReferences[++lastElementIndex] = referenceType | referenceHandle;
+        forwardReferences[0] = lastElementIndex;
+    }
+
+    /**
+      * Sets the bytecode offset of this label to the given value and resolves the forward references
+      * to this label, if any. This method must be called when this label is added to the bytecode of
+      * the method, i.e. when its bytecode offset becomes known. This method fills in the blanks that
+      * where left in the bytecode (and optionally in the stack map table) by each forward reference
+      * previously added to this label.
+      *
+      * @param code the bytecode of the method.
+      * @param stackMapTableEntries the 'entries' array of the StackMapTable code attribute of the
+      *     method. Maybe {@literal null}.
+      * @param bytecodeOffset the bytecode offset of this label.
+      * @return {@literal true} if a blank that was left for this label was too small to store the
+      *     offset. In such a case the corresponding jump instruction is replaced with an equivalent
+      *     ASM specific instruction using an unsigned two bytes offset. These ASM specific
+      *     instructions are later replaced with standard bytecode instructions with wider offsets (4
+      *     bytes instead of 2), in ClassReader.
+      */
+    final boolean resolve(
+            final byte[] code, final ByteVector stackMapTableEntries, final int bytecodeOffset) {
+        this.flags |= FLAG_RESOLVED;
+        this.bytecodeOffset = bytecodeOffset;
+        if (forwardReferences == null) {
+            return false;
+        }
+        boolean hasAsmInstructions = false;
+        for (int i = forwardReferences[0]; i > 0; i -= 2) {
+            final int sourceInsnBytecodeOffset = forwardReferences[i - 1];
+            final int reference = forwardReferences[i];
+            final int relativeOffset = bytecodeOffset - sourceInsnBytecodeOffset;
+            int handle = reference & FORWARD_REFERENCE_HANDLE_MASK;
+            if ((reference & FORWARD_REFERENCE_TYPE_MASK) == FORWARD_REFERENCE_TYPE_SHORT) {
+                if (relativeOffset < Short.MIN_VALUE || relativeOffset > Short.MAX_VALUE) {
+                    // Change the opcode of the jump instruction, in order to be able to find it later in
+                    // ClassReader. These ASM specific opcodes are similar to jump instruction opcodes, except
+                    // that the 2 bytes offset is unsigned (and can therefore represent values from 0 to
+                    // 65535, which is sufficient since the size of a method is limited to 65535 bytes).
+                    int opcode = code[sourceInsnBytecodeOffset] & 0xFF;
+                    if (opcode < Opcodes.IFNULL) {
+                        // Change IFEQ ... JSR to ASM_IFEQ ... ASM_JSR.
+                        code[sourceInsnBytecodeOffset] = (byte) (opcode + Constants.ASM_OPCODE_DELTA);
+                    } else {
+                        // Change IFNULL and IFNONNULL to ASM_IFNULL and ASM_IFNONNULL.
+                        code[sourceInsnBytecodeOffset] = (byte) (opcode + Constants.ASM_IFNULL_OPCODE_DELTA);
+                    }
+                    hasAsmInstructions = true;
+                }
+                code[handle++] = (byte) (relativeOffset >>> 8);
+                code[handle] = (byte) relativeOffset;
+            } else if ((reference & FORWARD_REFERENCE_TYPE_MASK) == FORWARD_REFERENCE_TYPE_WIDE) {
+                code[handle++] = (byte) (relativeOffset >>> 24);
+                code[handle++] = (byte) (relativeOffset >>> 16);
+                code[handle++] = (byte) (relativeOffset >>> 8);
+                code[handle] = (byte) relativeOffset;
+            } else {
+                stackMapTableEntries.data[handle++] = (byte) (bytecodeOffset >>> 8);
+                stackMapTableEntries.data[handle] = (byte) bytecodeOffset;
+            }
+        }
+        return hasAsmInstructions;
+    }
+
+    // -----------------------------------------------------------------------------------------------
+    // Methods related to subroutines
+    // -----------------------------------------------------------------------------------------------
+
+    /**
+      * Finds the basic blocks that belong to the subroutine starting with the basic block
+      * corresponding to this label, and marks these blocks as belonging to this subroutine. This
+      * method follows the control flow graph to find all the blocks that are reachable from the
+      * current basic block WITHOUT following any jsr target.
+      *
+      * <p>Note: a precondition and postcondition of this method is that all labels must have a null
+      * {@link #nextListElement}.
+      *
+      * @param subroutineId the id of the subroutine starting with the basic block corresponding to
+      *     this label.
+      */
+    final void markSubroutine(final short subroutineId) {
+        // Data flow algorithm: put this basic block in a list of blocks to process (which are blocks
+        // belonging to subroutine subroutineId) and, while there are blocks to process, remove one from
+        // the list, mark it as belonging to the subroutine, and add its successor basic blocks in the
+        // control flow graph to the list of blocks to process (if not already done).
+        Label listOfBlocksToProcess = this;
+        listOfBlocksToProcess.nextListElement = EMPTY_LIST;
+        while (listOfBlocksToProcess != EMPTY_LIST) {
+            // Remove a basic block from the list of blocks to process.
+            Label basicBlock = listOfBlocksToProcess;
+            listOfBlocksToProcess = listOfBlocksToProcess.nextListElement;
+            basicBlock.nextListElement = null;
+
+            // If it is not already marked as belonging to a subroutine, mark it as belonging to
+            // subroutineId and add its successors to the list of blocks to process (unless already done).
+            if (basicBlock.subroutineId == 0) {
+                basicBlock.subroutineId = subroutineId;
+                listOfBlocksToProcess = basicBlock.pushSuccessors(listOfBlocksToProcess);
+            }
+        }
+    }
+
+    /**
+      * Finds the basic blocks that end a subroutine starting with the basic block corresponding to
+      * this label and, for each one of them, adds an outgoing edge to the basic block following the
+      * given subroutine call. In other words, completes the control flow graph by adding the edges
+      * corresponding to the return from this subroutine, when called from the given caller basic
+      * block.
+      *
+      * <p>Note: a precondition and postcondition of this method is that all labels must have a null
+      * {@link #nextListElement}.
+      *
+      * @param subroutineCaller a basic block that ends with a jsr to the basic block corresponding to
+      *     this label. This label is supposed to correspond to the start of a subroutine.
+      */
+    final void addSubroutineRetSuccessors(final Label subroutineCaller) {
+        // Data flow algorithm: put this basic block in a list blocks to process (which are blocks
+        // belonging to a subroutine starting with this label) and, while there are blocks to process,
+        // remove one from the list, put it in a list of blocks that have been processed, add a return
+        // edge to the successor of subroutineCaller if applicable, and add its successor basic blocks
+        // in the control flow graph to the list of blocks to process (if not already done).
+        Label listOfProcessedBlocks = EMPTY_LIST;
+        Label listOfBlocksToProcess = this;
+        listOfBlocksToProcess.nextListElement = EMPTY_LIST;
+        while (listOfBlocksToProcess != EMPTY_LIST) {
+            // Move a basic block from the list of blocks to process to the list of processed blocks.
+            Label basicBlock = listOfBlocksToProcess;
+            listOfBlocksToProcess = basicBlock.nextListElement;
+            basicBlock.nextListElement = listOfProcessedBlocks;
+            listOfProcessedBlocks = basicBlock;
+
+            // Add an edge from this block to the successor of the caller basic block, if this block is
+            // the end of a subroutine and if this block and subroutineCaller do not belong to the same
+            // subroutine.
+            if ((basicBlock.flags & FLAG_SUBROUTINE_END) != 0
+                    && basicBlock.subroutineId != subroutineCaller.subroutineId) {
+                basicBlock.outgoingEdges =
+                        new Edge(
+                                basicBlock.outputStackSize,
+                                // By construction, the first outgoing edge of a basic block that ends with a jsr
+                                // instruction leads to the jsr continuation block, i.e. where execution continues
+                                // when ret is called (see {@link #FLAG_SUBROUTINE_CALLER}).
+                                subroutineCaller.outgoingEdges.successor,
+                                basicBlock.outgoingEdges);
+            }
+            // Add its successors to the list of blocks to process. Note that {@link #pushSuccessors} does
+            // not push basic blocks which are already in a list. Here this means either in the list of
+            // blocks to process, or in the list of already processed blocks. This second list is
+            // important to make sure we don't reprocess an already processed block.
+            listOfBlocksToProcess = basicBlock.pushSuccessors(listOfBlocksToProcess);
+        }
+        // Reset the {@link #nextListElement} of all the basic blocks that have been processed to null,
+        // so that this method can be called again with a different subroutine or subroutine caller.
+        while (listOfProcessedBlocks != EMPTY_LIST) {
+            Label newListOfProcessedBlocks = listOfProcessedBlocks.nextListElement;
+            listOfProcessedBlocks.nextListElement = null;
+            listOfProcessedBlocks = newListOfProcessedBlocks;
+        }
+    }
+
+    /**
+      * Adds the successors of this label in the method's control flow graph (except those
+      * corresponding to a jsr target, and those already in a list of labels) to the given list of
+      * blocks to process, and returns the new list.
+      *
+      * @param listOfLabelsToProcess a list of basic blocks to process, linked together with their
+      *     {@link #nextListElement} field.
+      * @return the new list of blocks to process.
+      */
+    private Label pushSuccessors(final Label listOfLabelsToProcess) {
+        Label newListOfLabelsToProcess = listOfLabelsToProcess;
+        Edge outgoingEdge = outgoingEdges;
+        while (outgoingEdge != null) {
+            // By construction, the second outgoing edge of a basic block that ends with a jsr instruction
+            // leads to the jsr target (see {@link #FLAG_SUBROUTINE_CALLER}).
+            boolean isJsrTarget =
+                    (flags & Label.FLAG_SUBROUTINE_CALLER) != 0 && outgoingEdge == outgoingEdges.nextEdge;
+            if (!isJsrTarget && outgoingEdge.successor.nextListElement == null) {
+                // Add this successor to the list of blocks to process, if it does not already belong to a
+                // list of labels.
+                outgoingEdge.successor.nextListElement = newListOfLabelsToProcess;
+                newListOfLabelsToProcess = outgoingEdge.successor;
+            }
+            outgoingEdge = outgoingEdge.nextEdge;
+        }
+        return newListOfLabelsToProcess;
+    }
+
+    // -----------------------------------------------------------------------------------------------
+    // Overridden Object methods
+    // -----------------------------------------------------------------------------------------------
+
+    /**
+      * Returns a string representation of this label.
+      *
+      * @return a string representation of this label.
+      */
+    @Override
+    public String toString() {
+        return "L" + System.identityHashCode(this);
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/org/objectweb/asm/MethodTooLargeException.class b/tests/test_data/std/jdk/internal/org/objectweb/asm/MethodTooLargeException.class
new file mode 100644
index 0000000000000000000000000000000000000000..a877d4c0af4e88b37fd24e413b9ff05e9c1d4ed3
GIT binary patch
literal 1287
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EznnP^KL7v#

literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/org/objectweb/asm/MethodTooLargeException.java b/tests/test_data/std/jdk/internal/org/objectweb/asm/MethodTooLargeException.java
new file mode 100644
index 00000000..a2c9cee1
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/org/objectweb/asm/MethodTooLargeException.java
@@ -0,0 +1,131 @@
+/*
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/*
+ * This file is available under and governed by the GNU General Public
+ * License version 2 only, as published by the Free Software Foundation.
+ * However, the following notice accompanied the original version of this
+ * file:
+ *
+ * ASM: a very small and fast Java bytecode manipulation framework
+ * Copyright (c) 2000-2011 INRIA, France Telecom
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the copyright holders nor the names of its
+ *    contributors may be used to endorse or promote products derived from
+ *    this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+package jdk.internal.org.objectweb.asm;
+
+/**
+ * Exception thrown when the Code attribute of a method produced by a {@link ClassWriter} is too
+ * large.
+ *
+ * @author Jason Zaugg
+ */
+public final class MethodTooLargeException extends IndexOutOfBoundsException {
+    private static final long serialVersionUID = 6807380416709738314L;
+
+    private final String className;
+    private final String methodName;
+    private final String descriptor;
+    private final int codeSize;
+
+    /**
+      * Constructs a new {@link MethodTooLargeException}.
+      *
+      * @param className the internal name of the owner class (see {@link Type#getInternalName()}).
+      * @param methodName the name of the method.
+      * @param descriptor the descriptor of the method.
+      * @param codeSize the size of the method's Code attribute, in bytes.
+      */
+    public MethodTooLargeException(
+            final String className,
+            final String methodName,
+            final String descriptor,
+            final int codeSize) {
+        super("Method too large: " + className + "." + methodName + " " + descriptor);
+        this.className = className;
+        this.methodName = methodName;
+        this.descriptor = descriptor;
+        this.codeSize = codeSize;
+    }
+
+    /**
+      * Returns the internal name of the owner class.
+      *
+      * @return the internal name of the owner class (see {@link Type#getInternalName()}).
+      */
+    public String getClassName() {
+        return className;
+    }
+
+    /**
+      * Returns the name of the method.
+      *
+      * @return the name of the method.
+      */
+    public String getMethodName() {
+        return methodName;
+    }
+
+    /**
+      * Returns the descriptor of the method.
+      *
+      * @return the descriptor of the method.
+      */
+    public String getDescriptor() {
+        return descriptor;
+    }
+
+    /**
+      * Returns the size of the method's Code attribute, in bytes.
+      *
+      * @return the size of the method's Code attribute, in bytes.
+      */
+    public int getCodeSize() {
+        return codeSize;
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/org/objectweb/asm/MethodVisitor.class b/tests/test_data/std/jdk/internal/org/objectweb/asm/MethodVisitor.class
new file mode 100644
index 0000000000000000000000000000000000000000..15b1796f1d5b99c4c3943f6a2ff0c597c77a4535
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/org/objectweb/asm/MethodVisitor.java b/tests/test_data/std/jdk/internal/org/objectweb/asm/MethodVisitor.java
new file mode 100644
index 00000000..08c3adb2
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/org/objectweb/asm/MethodVisitor.java
@@ -0,0 +1,827 @@
+/*
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/*
+ * This file is available under and governed by the GNU General Public
+ * License version 2 only, as published by the Free Software Foundation.
+ * However, the following notice accompanied the original version of this
+ * file:
+ *
+ * ASM: a very small and fast Java bytecode manipulation framework
+ * Copyright (c) 2000-2011 INRIA, France Telecom
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the copyright holders nor the names of its
+ *    contributors may be used to endorse or promote products derived from
+ *    this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+package jdk.internal.org.objectweb.asm;
+
+/**
+ * A visitor to visit a Java method. The methods of this class must be called in the following
+ * order: ( {@code visitParameter} )* [ {@code visitAnnotationDefault} ] ( {@code visitAnnotation} |
+ * {@code visitAnnotableParameterCount} | {@code visitParameterAnnotation} | {@code
+ * visitTypeAnnotation} | {@code visitAttribute} )* [ {@code visitCode} ( {@code visitFrame} |
+ * {@code visit<i>X</i>Insn} | {@code visitLabel} | {@code visitInsnAnnotation} | {@code
+ * visitTryCatchBlock} | {@code visitTryCatchAnnotation} | {@code visitLocalVariable} | {@code
+ * visitLocalVariableAnnotation} | {@code visitLineNumber} )* {@code visitMaxs} ] {@code visitEnd}.
+ * In addition, the {@code visit<i>X</i>Insn} and {@code visitLabel} methods must be called in the
+ * sequential order of the bytecode instructions of the visited code, {@code visitInsnAnnotation}
+ * must be called <i>after</i> the annotated instruction, {@code visitTryCatchBlock} must be called
+ * <i>before</i> the labels passed as arguments have been visited, {@code
+ * visitTryCatchBlockAnnotation} must be called <i>after</i> the corresponding try catch block has
+ * been visited, and the {@code visitLocalVariable}, {@code visitLocalVariableAnnotation} and {@code
+ * visitLineNumber} methods must be called <i>after</i> the labels passed as arguments have been
+ * visited.
+ *
+ * @author Eric Bruneton
+ */
+public abstract class MethodVisitor {
+
+    private static final String REQUIRES_ASM5 = "This feature requires ASM5";
+
+    /**
+      * The ASM API version implemented by this visitor. The value of this field must be one of the
+      * {@code ASM}<i>x</i> values in {@link Opcodes}.
+      */
+    protected final int api;
+
+    /**
+      * The method visitor to which this visitor must delegate method calls. May be {@literal null}.
+      */
+    protected MethodVisitor mv;
+
+    /**
+      * Constructs a new {@link MethodVisitor}.
+      *
+      * @param api the ASM API version implemented by this visitor. Must be one of the {@code
+      *     ASM}<i>x</i> values in {@link Opcodes}.
+      */
+    protected MethodVisitor(final int api) {
+        this(api, null);
+    }
+
+    /**
+      * Constructs a new {@link MethodVisitor}.
+      *
+      * @param api the ASM API version implemented by this visitor. Must be one of the {@code
+      *     ASM}<i>x</i> values in {@link Opcodes}.
+      * @param methodVisitor the method visitor to which this visitor must delegate method calls. May
+      *     be null.
+      */
+    protected MethodVisitor(final int api, final MethodVisitor methodVisitor) {
+        if (api != Opcodes.ASM9
+                && api != Opcodes.ASM8
+                && api != Opcodes.ASM7
+                && api != Opcodes.ASM6
+                && api != Opcodes.ASM5
+                && api != Opcodes.ASM4) {
+            throw new IllegalArgumentException("Unsupported api " + api);
+        }
+        this.api = api;
+        this.mv = methodVisitor;
+    }
+
+    /**
+      * The method visitor to which this visitor must delegate method calls. May be {@literal null}.
+      *
+      * @return the method visitor to which this visitor must delegate method calls, or {@literal
+      *     null}.
+      */
+    public MethodVisitor getDelegate() {
+        return mv;
+    }
+
+    // -----------------------------------------------------------------------------------------------
+    // Parameters, annotations and non standard attributes
+    // -----------------------------------------------------------------------------------------------
+
+    /**
+      * Visits a parameter of this method.
+      *
+      * @param name parameter name or {@literal null} if none is provided.
+      * @param access the parameter's access flags, only {@code ACC_FINAL}, {@code ACC_SYNTHETIC}
+      *     or/and {@code ACC_MANDATED} are allowed (see {@link Opcodes}).
+      */
+    public void visitParameter(final String name, final int access) {
+        if (api < Opcodes.ASM5) {
+            throw new UnsupportedOperationException(REQUIRES_ASM5);
+        }
+        if (mv != null) {
+            mv.visitParameter(name, access);
+        }
+    }
+
+    /**
+      * Visits the default value of this annotation interface method.
+      *
+      * @return a visitor to the visit the actual default value of this annotation interface method, or
+      *     {@literal null} if this visitor is not interested in visiting this default value. The
+      *     'name' parameters passed to the methods of this annotation visitor are ignored. Moreover,
+      *     exactly one visit method must be called on this annotation visitor, followed by visitEnd.
+      */
+    public AnnotationVisitor visitAnnotationDefault() {
+        if (mv != null) {
+            return mv.visitAnnotationDefault();
+        }
+        return null;
+    }
+
+    /**
+      * Visits an annotation of this method.
+      *
+      * @param descriptor the class descriptor of the annotation class.
+      * @param visible {@literal true} if the annotation is visible at runtime.
+      * @return a visitor to visit the annotation values, or {@literal null} if this visitor is not
+      *     interested in visiting this annotation.
+      */
+    public AnnotationVisitor visitAnnotation(final String descriptor, final boolean visible) {
+        if (mv != null) {
+            return mv.visitAnnotation(descriptor, visible);
+        }
+        return null;
+    }
+
+    /**
+      * Visits an annotation on a type in the method signature.
+      *
+      * @param typeRef a reference to the annotated type. The sort of this type reference must be
+      *     {@link TypeReference#METHOD_TYPE_PARAMETER}, {@link
+      *     TypeReference#METHOD_TYPE_PARAMETER_BOUND}, {@link TypeReference#METHOD_RETURN}, {@link
+      *     TypeReference#METHOD_RECEIVER}, {@link TypeReference#METHOD_FORMAL_PARAMETER} or {@link
+      *     TypeReference#THROWS}. See {@link TypeReference}.
+      * @param typePath the path to the annotated type argument, wildcard bound, array element type, or
+      *     static inner type within 'typeRef'. May be {@literal null} if the annotation targets
+      *     'typeRef' as a whole.
+      * @param descriptor the class descriptor of the annotation class.
+      * @param visible {@literal true} if the annotation is visible at runtime.
+      * @return a visitor to visit the annotation values, or {@literal null} if this visitor is not
+      *     interested in visiting this annotation.
+      */
+    public AnnotationVisitor visitTypeAnnotation(
+            final int typeRef, final TypePath typePath, final String descriptor, final boolean visible) {
+        if (api < Opcodes.ASM5) {
+            throw new UnsupportedOperationException(REQUIRES_ASM5);
+        }
+        if (mv != null) {
+            return mv.visitTypeAnnotation(typeRef, typePath, descriptor, visible);
+        }
+        return null;
+    }
+
+    /**
+      * Visits the number of method parameters that can have annotations. By default (i.e. when this
+      * method is not called), all the method parameters defined by the method descriptor can have
+      * annotations.
+      *
+      * @param parameterCount the number of method parameters than can have annotations. This number
+      *     must be less or equal than the number of parameter types in the method descriptor. It can
+      *     be strictly less when a method has synthetic parameters and when these parameters are
+      *     ignored when computing parameter indices for the purpose of parameter annotations (see
+      *     https://docs.oracle.com/javase/specs/jvms/se9/html/jvms-4.html#jvms-4.7.18).
+      * @param visible {@literal true} to define the number of method parameters that can have
+      *     annotations visible at runtime, {@literal false} to define the number of method parameters
+      *     that can have annotations invisible at runtime.
+      */
+    public void visitAnnotableParameterCount(final int parameterCount, final boolean visible) {
+        if (mv != null) {
+            mv.visitAnnotableParameterCount(parameterCount, visible);
+        }
+    }
+
+    /**
+      * Visits an annotation of a parameter this method.
+      *
+      * @param parameter the parameter index. This index must be strictly smaller than the number of
+      *     parameters in the method descriptor, and strictly smaller than the parameter count
+      *     specified in {@link #visitAnnotableParameterCount}. Important note: <i>a parameter index i
+      *     is not required to correspond to the i'th parameter descriptor in the method
+      *     descriptor</i>, in particular in case of synthetic parameters (see
+      *     https://docs.oracle.com/javase/specs/jvms/se9/html/jvms-4.html#jvms-4.7.18).
+      * @param descriptor the class descriptor of the annotation class.
+      * @param visible {@literal true} if the annotation is visible at runtime.
+      * @return a visitor to visit the annotation values, or {@literal null} if this visitor is not
+      *     interested in visiting this annotation.
+      */
+    public AnnotationVisitor visitParameterAnnotation(
+            final int parameter, final String descriptor, final boolean visible) {
+        if (mv != null) {
+            return mv.visitParameterAnnotation(parameter, descriptor, visible);
+        }
+        return null;
+    }
+
+    /**
+      * Visits a non standard attribute of this method.
+      *
+      * @param attribute an attribute.
+      */
+    public void visitAttribute(final Attribute attribute) {
+        if (mv != null) {
+            mv.visitAttribute(attribute);
+        }
+    }
+
+    /** Starts the visit of the method's code, if any (i.e. non abstract method). */
+    public void visitCode() {
+        if (mv != null) {
+            mv.visitCode();
+        }
+    }
+
+    /**
+      * Visits the current state of the local variables and operand stack elements. This method must(*)
+      * be called <i>just before</i> any instruction <b>i</b> that follows an unconditional branch
+      * instruction such as GOTO or THROW, that is the target of a jump instruction, or that starts an
+      * exception handler block. The visited types must describe the values of the local variables and
+      * of the operand stack elements <i>just before</i> <b>i</b> is executed.<br>
+      * <br>
+      * (*) this is mandatory only for classes whose version is greater than or equal to {@link
+      * Opcodes#V1_6}. <br>
+      * <br>
+      * The frames of a method must be given either in expanded form, or in compressed form (all frames
+      * must use the same format, i.e. you must not mix expanded and compressed frames within a single
+      * method):
+      *
+      * <ul>
+      *   <li>In expanded form, all frames must have the F_NEW type.
+      *   <li>In compressed form, frames are basically "deltas" from the state of the previous frame:
+      *       <ul>
+      *         <li>{@link Opcodes#F_SAME} representing frame with exactly the same locals as the
+      *             previous frame and with the empty stack.
+      *         <li>{@link Opcodes#F_SAME1} representing frame with exactly the same locals as the
+      *             previous frame and with single value on the stack ( <code>numStack</code> is 1 and
+      *             <code>stack[0]</code> contains value for the type of the stack item).
+      *         <li>{@link Opcodes#F_APPEND} representing frame with current locals are the same as the
+      *             locals in the previous frame, except that additional locals are defined (<code>
+      *             numLocal</code> is 1, 2 or 3 and <code>local</code> elements contains values
+      *             representing added types).
+      *         <li>{@link Opcodes#F_CHOP} representing frame with current locals are the same as the
+      *             locals in the previous frame, except that the last 1-3 locals are absent and with
+      *             the empty stack (<code>numLocal</code> is 1, 2 or 3).
+      *         <li>{@link Opcodes#F_FULL} representing complete frame data.
+      *       </ul>
+      * </ul>
+      *
+      * <br>
+      * In both cases the first frame, corresponding to the method's parameters and access flags, is
+      * implicit and must not be visited. Also, it is illegal to visit two or more frames for the same
+      * code location (i.e., at least one instruction must be visited between two calls to visitFrame).
+      *
+      * @param type the type of this stack map frame. Must be {@link Opcodes#F_NEW} for expanded
+      *     frames, or {@link Opcodes#F_FULL}, {@link Opcodes#F_APPEND}, {@link Opcodes#F_CHOP}, {@link
+      *     Opcodes#F_SAME} or {@link Opcodes#F_APPEND}, {@link Opcodes#F_SAME1} for compressed frames.
+      * @param numLocal the number of local variables in the visited frame. Long and double values
+      *     count for one variable.
+      * @param local the local variable types in this frame. This array must not be modified. Primitive
+      *     types are represented by {@link Opcodes#TOP}, {@link Opcodes#INTEGER}, {@link
+      *     Opcodes#FLOAT}, {@link Opcodes#LONG}, {@link Opcodes#DOUBLE}, {@link Opcodes#NULL} or
+      *     {@link Opcodes#UNINITIALIZED_THIS} (long and double are represented by a single element).
+      *     Reference types are represented by String objects (representing internal names, see {@link
+      *     Type#getInternalName()}), and uninitialized types by Label objects (this label designates
+      *     the NEW instruction that created this uninitialized value).
+      * @param numStack the number of operand stack elements in the visited frame. Long and double
+      *     values count for one stack element.
+      * @param stack the operand stack types in this frame. This array must not be modified. Its
+      *     content has the same format as the "local" array.
+      * @throws IllegalStateException if a frame is visited just after another one, without any
+      *     instruction between the two (unless this frame is a Opcodes#F_SAME frame, in which case it
+      *     is silently ignored).
+      */
+    public void visitFrame(
+            final int type,
+            final int numLocal,
+            final Object[] local,
+            final int numStack,
+            final Object[] stack) {
+        if (mv != null) {
+            mv.visitFrame(type, numLocal, local, numStack, stack);
+        }
+    }
+
+    // -----------------------------------------------------------------------------------------------
+    // Normal instructions
+    // -----------------------------------------------------------------------------------------------
+
+    /**
+      * Visits a zero operand instruction.
+      *
+      * @param opcode the opcode of the instruction to be visited. This opcode is either NOP,
+      *     ACONST_NULL, ICONST_M1, ICONST_0, ICONST_1, ICONST_2, ICONST_3, ICONST_4, ICONST_5,
+      *     LCONST_0, LCONST_1, FCONST_0, FCONST_1, FCONST_2, DCONST_0, DCONST_1, IALOAD, LALOAD,
+      *     FALOAD, DALOAD, AALOAD, BALOAD, CALOAD, SALOAD, IASTORE, LASTORE, FASTORE, DASTORE,
+      *     AASTORE, BASTORE, CASTORE, SASTORE, POP, POP2, DUP, DUP_X1, DUP_X2, DUP2, DUP2_X1, DUP2_X2,
+      *     SWAP, IADD, LADD, FADD, DADD, ISUB, LSUB, FSUB, DSUB, IMUL, LMUL, FMUL, DMUL, IDIV, LDIV,
+      *     FDIV, DDIV, IREM, LREM, FREM, DREM, INEG, LNEG, FNEG, DNEG, ISHL, LSHL, ISHR, LSHR, IUSHR,
+      *     LUSHR, IAND, LAND, IOR, LOR, IXOR, LXOR, I2L, I2F, I2D, L2I, L2F, L2D, F2I, F2L, F2D, D2I,
+      *     D2L, D2F, I2B, I2C, I2S, LCMP, FCMPL, FCMPG, DCMPL, DCMPG, IRETURN, LRETURN, FRETURN,
+      *     DRETURN, ARETURN, RETURN, ARRAYLENGTH, ATHROW, MONITORENTER, or MONITOREXIT.
+      */
+    public void visitInsn(final int opcode) {
+        if (mv != null) {
+            mv.visitInsn(opcode);
+        }
+    }
+
+    /**
+      * Visits an instruction with a single int operand.
+      *
+      * @param opcode the opcode of the instruction to be visited. This opcode is either BIPUSH, SIPUSH
+      *     or NEWARRAY.
+      * @param operand the operand of the instruction to be visited.<br>
+      *     When opcode is BIPUSH, operand value should be between Byte.MIN_VALUE and Byte.MAX_VALUE.
+      *     <br>
+      *     When opcode is SIPUSH, operand value should be between Short.MIN_VALUE and Short.MAX_VALUE.
+      *     <br>
+      *     When opcode is NEWARRAY, operand value should be one of {@link Opcodes#T_BOOLEAN}, {@link
+      *     Opcodes#T_CHAR}, {@link Opcodes#T_FLOAT}, {@link Opcodes#T_DOUBLE}, {@link Opcodes#T_BYTE},
+      *     {@link Opcodes#T_SHORT}, {@link Opcodes#T_INT} or {@link Opcodes#T_LONG}.
+      */
+    public void visitIntInsn(final int opcode, final int operand) {
+        if (mv != null) {
+            mv.visitIntInsn(opcode, operand);
+        }
+    }
+
+    /**
+      * Visits a local variable instruction. A local variable instruction is an instruction that loads
+      * or stores the value of a local variable.
+      *
+      * @param opcode the opcode of the local variable instruction to be visited. This opcode is either
+      *     ILOAD, LLOAD, FLOAD, DLOAD, ALOAD, ISTORE, LSTORE, FSTORE, DSTORE, ASTORE or RET.
+      * @param varIndex the operand of the instruction to be visited. This operand is the index of a
+      *     local variable.
+      */
+    public void visitVarInsn(final int opcode, final int varIndex) {
+        if (mv != null) {
+            mv.visitVarInsn(opcode, varIndex);
+        }
+    }
+
+    /**
+      * Visits a type instruction. A type instruction is an instruction that takes the internal name of
+      * a class as parameter (see {@link Type#getInternalName()}).
+      *
+      * @param opcode the opcode of the type instruction to be visited. This opcode is either NEW,
+      *     ANEWARRAY, CHECKCAST or INSTANCEOF.
+      * @param type the operand of the instruction to be visited. This operand must be the internal
+      *     name of an object or array class (see {@link Type#getInternalName()}).
+      */
+    public void visitTypeInsn(final int opcode, final String type) {
+        if (mv != null) {
+            mv.visitTypeInsn(opcode, type);
+        }
+    }
+
+    /**
+      * Visits a field instruction. A field instruction is an instruction that loads or stores the
+      * value of a field of an object.
+      *
+      * @param opcode the opcode of the type instruction to be visited. This opcode is either
+      *     GETSTATIC, PUTSTATIC, GETFIELD or PUTFIELD.
+      * @param owner the internal name of the field's owner class (see {@link Type#getInternalName()}).
+      * @param name the field's name.
+      * @param descriptor the field's descriptor (see {@link Type}).
+      */
+    public void visitFieldInsn(
+            final int opcode, final String owner, final String name, final String descriptor) {
+        if (mv != null) {
+            mv.visitFieldInsn(opcode, owner, name, descriptor);
+        }
+    }
+
+    /**
+      * Visits a method instruction. A method instruction is an instruction that invokes a method.
+      *
+      * @param opcode the opcode of the type instruction to be visited. This opcode is either
+      *     INVOKEVIRTUAL, INVOKESPECIAL, INVOKESTATIC or INVOKEINTERFACE.
+      * @param owner the internal name of the method's owner class (see {@link
+      *     Type#getInternalName()}).
+      * @param name the method's name.
+      * @param descriptor the method's descriptor (see {@link Type}).
+      * @deprecated use {@link #visitMethodInsn(int, String, String, String, boolean)} instead.
+      */
+    @Deprecated
+    public void visitMethodInsn(
+            final int opcode, final String owner, final String name, final String descriptor) {
+        int opcodeAndSource = opcode | (api < Opcodes.ASM5 ? Opcodes.SOURCE_DEPRECATED : 0);
+        visitMethodInsn(opcodeAndSource, owner, name, descriptor, opcode == Opcodes.INVOKEINTERFACE);
+    }
+
+    /**
+      * Visits a method instruction. A method instruction is an instruction that invokes a method.
+      *
+      * @param opcode the opcode of the type instruction to be visited. This opcode is either
+      *     INVOKEVIRTUAL, INVOKESPECIAL, INVOKESTATIC or INVOKEINTERFACE.
+      * @param owner the internal name of the method's owner class (see {@link
+      *     Type#getInternalName()}).
+      * @param name the method's name.
+      * @param descriptor the method's descriptor (see {@link Type}).
+      * @param isInterface if the method's owner class is an interface.
+      */
+    public void visitMethodInsn(
+            final int opcode,
+            final String owner,
+            final String name,
+            final String descriptor,
+            final boolean isInterface) {
+        if (api < Opcodes.ASM5 && (opcode & Opcodes.SOURCE_DEPRECATED) == 0) {
+            if (isInterface != (opcode == Opcodes.INVOKEINTERFACE)) {
+                throw new UnsupportedOperationException("INVOKESPECIAL/STATIC on interfaces requires ASM5");
+            }
+            visitMethodInsn(opcode, owner, name, descriptor);
+            return;
+        }
+        if (mv != null) {
+            mv.visitMethodInsn(opcode & ~Opcodes.SOURCE_MASK, owner, name, descriptor, isInterface);
+        }
+    }
+
+    /**
+      * Visits an invokedynamic instruction.
+      *
+      * @param name the method's name.
+      * @param descriptor the method's descriptor (see {@link Type}).
+      * @param bootstrapMethodHandle the bootstrap method.
+      * @param bootstrapMethodArguments the bootstrap method constant arguments. Each argument must be
+      *     an {@link Integer}, {@link Float}, {@link Long}, {@link Double}, {@link String}, {@link
+      *     Type}, {@link Handle} or {@link ConstantDynamic} value. This method is allowed to modify
+      *     the content of the array so a caller should expect that this array may change.
+      */
+    public void visitInvokeDynamicInsn(
+            final String name,
+            final String descriptor,
+            final Handle bootstrapMethodHandle,
+            final Object... bootstrapMethodArguments) {
+        if (api < Opcodes.ASM5) {
+            throw new UnsupportedOperationException(REQUIRES_ASM5);
+        }
+        if (mv != null) {
+            mv.visitInvokeDynamicInsn(name, descriptor, bootstrapMethodHandle, bootstrapMethodArguments);
+        }
+    }
+
+    /**
+      * Visits a jump instruction. A jump instruction is an instruction that may jump to another
+      * instruction.
+      *
+      * @param opcode the opcode of the type instruction to be visited. This opcode is either IFEQ,
+      *     IFNE, IFLT, IFGE, IFGT, IFLE, IF_ICMPEQ, IF_ICMPNE, IF_ICMPLT, IF_ICMPGE, IF_ICMPGT,
+      *     IF_ICMPLE, IF_ACMPEQ, IF_ACMPNE, GOTO, JSR, IFNULL or IFNONNULL.
+      * @param label the operand of the instruction to be visited. This operand is a label that
+      *     designates the instruction to which the jump instruction may jump.
+      */
+    public void visitJumpInsn(final int opcode, final Label label) {
+        if (mv != null) {
+            mv.visitJumpInsn(opcode, label);
+        }
+    }
+
+    /**
+      * Visits a label. A label designates the instruction that will be visited just after it.
+      *
+      * @param label a {@link Label} object.
+      */
+    public void visitLabel(final Label label) {
+        if (mv != null) {
+            mv.visitLabel(label);
+        }
+    }
+
+    // -----------------------------------------------------------------------------------------------
+    // Special instructions
+    // -----------------------------------------------------------------------------------------------
+
+    /**
+      * Visits a LDC instruction. Note that new constant types may be added in future versions of the
+      * Java Virtual Machine. To easily detect new constant types, implementations of this method
+      * should check for unexpected constant types, like this:
+      *
+      * <pre>
+      * if (cst instanceof Integer) {
+      *     // ...
+      * } else if (cst instanceof Float) {
+      *     // ...
+      * } else if (cst instanceof Long) {
+      *     // ...
+      * } else if (cst instanceof Double) {
+      *     // ...
+      * } else if (cst instanceof String) {
+      *     // ...
+      * } else if (cst instanceof Type) {
+      *     int sort = ((Type) cst).getSort();
+      *     if (sort == Type.OBJECT) {
+      *         // ...
+      *     } else if (sort == Type.ARRAY) {
+      *         // ...
+      *     } else if (sort == Type.METHOD) {
+      *         // ...
+      *     } else {
+      *         // throw an exception
+      *     }
+      * } else if (cst instanceof Handle) {
+      *     // ...
+      * } else if (cst instanceof ConstantDynamic) {
+      *     // ...
+      * } else {
+      *     // throw an exception
+      * }
+      * </pre>
+      *
+      * @param value the constant to be loaded on the stack. This parameter must be a non null {@link
+      *     Integer}, a {@link Float}, a {@link Long}, a {@link Double}, a {@link String}, a {@link
+      *     Type} of OBJECT or ARRAY sort for {@code .class} constants, for classes whose version is
+      *     49, a {@link Type} of METHOD sort for MethodType, a {@link Handle} for MethodHandle
+      *     constants, for classes whose version is 51 or a {@link ConstantDynamic} for a constant
+      *     dynamic for classes whose version is 55.
+      */
+    public void visitLdcInsn(final Object value) {
+        if (api < Opcodes.ASM5
+                && (value instanceof Handle
+                        || (value instanceof Type && ((Type) value).getSort() == Type.METHOD))) {
+            throw new UnsupportedOperationException(REQUIRES_ASM5);
+        }
+        if (api < Opcodes.ASM7 && value instanceof ConstantDynamic) {
+            throw new UnsupportedOperationException("This feature requires ASM7");
+        }
+        if (mv != null) {
+            mv.visitLdcInsn(value);
+        }
+    }
+
+    /**
+      * Visits an IINC instruction.
+      *
+      * @param varIndex index of the local variable to be incremented.
+      * @param increment amount to increment the local variable by.
+      */
+    public void visitIincInsn(final int varIndex, final int increment) {
+        if (mv != null) {
+            mv.visitIincInsn(varIndex, increment);
+        }
+    }
+
+    /**
+      * Visits a TABLESWITCH instruction.
+      *
+      * @param min the minimum key value.
+      * @param max the maximum key value.
+      * @param dflt beginning of the default handler block.
+      * @param labels beginnings of the handler blocks. {@code labels[i]} is the beginning of the
+      *     handler block for the {@code min + i} key.
+      */
+    public void visitTableSwitchInsn(
+            final int min, final int max, final Label dflt, final Label... labels) {
+        if (mv != null) {
+            mv.visitTableSwitchInsn(min, max, dflt, labels);
+        }
+    }
+
+    /**
+      * Visits a LOOKUPSWITCH instruction.
+      *
+      * @param dflt beginning of the default handler block.
+      * @param keys the values of the keys.
+      * @param labels beginnings of the handler blocks. {@code labels[i]} is the beginning of the
+      *     handler block for the {@code keys[i]} key.
+      */
+    public void visitLookupSwitchInsn(final Label dflt, final int[] keys, final Label[] labels) {
+        if (mv != null) {
+            mv.visitLookupSwitchInsn(dflt, keys, labels);
+        }
+    }
+
+    /**
+      * Visits a MULTIANEWARRAY instruction.
+      *
+      * @param descriptor an array type descriptor (see {@link Type}).
+      * @param numDimensions the number of dimensions of the array to allocate.
+      */
+    public void visitMultiANewArrayInsn(final String descriptor, final int numDimensions) {
+        if (mv != null) {
+            mv.visitMultiANewArrayInsn(descriptor, numDimensions);
+        }
+    }
+
+    /**
+      * Visits an annotation on an instruction. This method must be called just <i>after</i> the
+      * annotated instruction. It can be called several times for the same instruction.
+      *
+      * @param typeRef a reference to the annotated type. The sort of this type reference must be
+      *     {@link TypeReference#INSTANCEOF}, {@link TypeReference#NEW}, {@link
+      *     TypeReference#CONSTRUCTOR_REFERENCE}, {@link TypeReference#METHOD_REFERENCE}, {@link
+      *     TypeReference#CAST}, {@link TypeReference#CONSTRUCTOR_INVOCATION_TYPE_ARGUMENT}, {@link
+      *     TypeReference#METHOD_INVOCATION_TYPE_ARGUMENT}, {@link
+      *     TypeReference#CONSTRUCTOR_REFERENCE_TYPE_ARGUMENT}, or {@link
+      *     TypeReference#METHOD_REFERENCE_TYPE_ARGUMENT}. See {@link TypeReference}.
+      * @param typePath the path to the annotated type argument, wildcard bound, array element type, or
+      *     static inner type within 'typeRef'. May be {@literal null} if the annotation targets
+      *     'typeRef' as a whole.
+      * @param descriptor the class descriptor of the annotation class.
+      * @param visible {@literal true} if the annotation is visible at runtime.
+      * @return a visitor to visit the annotation values, or {@literal null} if this visitor is not
+      *     interested in visiting this annotation.
+      */
+    public AnnotationVisitor visitInsnAnnotation(
+            final int typeRef, final TypePath typePath, final String descriptor, final boolean visible) {
+        if (api < Opcodes.ASM5) {
+            throw new UnsupportedOperationException(REQUIRES_ASM5);
+        }
+        if (mv != null) {
+            return mv.visitInsnAnnotation(typeRef, typePath, descriptor, visible);
+        }
+        return null;
+    }
+
+    // -----------------------------------------------------------------------------------------------
+    // Exceptions table entries, debug information, max stack and max locals
+    // -----------------------------------------------------------------------------------------------
+
+    /**
+      * Visits a try catch block.
+      *
+      * @param start the beginning of the exception handler's scope (inclusive).
+      * @param end the end of the exception handler's scope (exclusive).
+      * @param handler the beginning of the exception handler's code.
+      * @param type the internal name of the type of exceptions handled by the handler (see {@link
+      *     Type#getInternalName()}), or {@literal null} to catch any exceptions (for "finally"
+      *     blocks).
+      * @throws IllegalArgumentException if one of the labels has already been visited by this visitor
+      *     (by the {@link #visitLabel} method).
+      */
+    public void visitTryCatchBlock(
+            final Label start, final Label end, final Label handler, final String type) {
+        if (mv != null) {
+            mv.visitTryCatchBlock(start, end, handler, type);
+        }
+    }
+
+    /**
+      * Visits an annotation on an exception handler type. This method must be called <i>after</i> the
+      * {@link #visitTryCatchBlock} for the annotated exception handler. It can be called several times
+      * for the same exception handler.
+      *
+      * @param typeRef a reference to the annotated type. The sort of this type reference must be
+      *     {@link TypeReference#EXCEPTION_PARAMETER}. See {@link TypeReference}.
+      * @param typePath the path to the annotated type argument, wildcard bound, array element type, or
+      *     static inner type within 'typeRef'. May be {@literal null} if the annotation targets
+      *     'typeRef' as a whole.
+      * @param descriptor the class descriptor of the annotation class.
+      * @param visible {@literal true} if the annotation is visible at runtime.
+      * @return a visitor to visit the annotation values, or {@literal null} if this visitor is not
+      *     interested in visiting this annotation.
+      */
+    public AnnotationVisitor visitTryCatchAnnotation(
+            final int typeRef, final TypePath typePath, final String descriptor, final boolean visible) {
+        if (api < Opcodes.ASM5) {
+            throw new UnsupportedOperationException(REQUIRES_ASM5);
+        }
+        if (mv != null) {
+            return mv.visitTryCatchAnnotation(typeRef, typePath, descriptor, visible);
+        }
+        return null;
+    }
+
+    /**
+      * Visits a local variable declaration.
+      *
+      * @param name the name of a local variable.
+      * @param descriptor the type descriptor of this local variable.
+      * @param signature the type signature of this local variable. May be {@literal null} if the local
+      *     variable type does not use generic types.
+      * @param start the first instruction corresponding to the scope of this local variable
+      *     (inclusive).
+      * @param end the last instruction corresponding to the scope of this local variable (exclusive).
+      * @param index the local variable's index.
+      * @throws IllegalArgumentException if one of the labels has not already been visited by this
+      *     visitor (by the {@link #visitLabel} method).
+      */
+    public void visitLocalVariable(
+            final String name,
+            final String descriptor,
+            final String signature,
+            final Label start,
+            final Label end,
+            final int index) {
+        if (mv != null) {
+            mv.visitLocalVariable(name, descriptor, signature, start, end, index);
+        }
+    }
+
+    /**
+      * Visits an annotation on a local variable type.
+      *
+      * @param typeRef a reference to the annotated type. The sort of this type reference must be
+      *     {@link TypeReference#LOCAL_VARIABLE} or {@link TypeReference#RESOURCE_VARIABLE}. See {@link
+      *     TypeReference}.
+      * @param typePath the path to the annotated type argument, wildcard bound, array element type, or
+      *     static inner type within 'typeRef'. May be {@literal null} if the annotation targets
+      *     'typeRef' as a whole.
+      * @param start the fist instructions corresponding to the continuous ranges that make the scope
+      *     of this local variable (inclusive).
+      * @param end the last instructions corresponding to the continuous ranges that make the scope of
+      *     this local variable (exclusive). This array must have the same size as the 'start' array.
+      * @param index the local variable's index in each range. This array must have the same size as
+      *     the 'start' array.
+      * @param descriptor the class descriptor of the annotation class.
+      * @param visible {@literal true} if the annotation is visible at runtime.
+      * @return a visitor to visit the annotation values, or {@literal null} if this visitor is not
+      *     interested in visiting this annotation.
+      */
+    public AnnotationVisitor visitLocalVariableAnnotation(
+            final int typeRef,
+            final TypePath typePath,
+            final Label[] start,
+            final Label[] end,
+            final int[] index,
+            final String descriptor,
+            final boolean visible) {
+        if (api < Opcodes.ASM5) {
+            throw new UnsupportedOperationException(REQUIRES_ASM5);
+        }
+        if (mv != null) {
+            return mv.visitLocalVariableAnnotation(
+                    typeRef, typePath, start, end, index, descriptor, visible);
+        }
+        return null;
+    }
+
+    /**
+      * Visits a line number declaration.
+      *
+      * @param line a line number. This number refers to the source file from which the class was
+      *     compiled.
+      * @param start the first instruction corresponding to this line number.
+      * @throws IllegalArgumentException if {@code start} has not already been visited by this visitor
+      *     (by the {@link #visitLabel} method).
+      */
+    public void visitLineNumber(final int line, final Label start) {
+        if (mv != null) {
+            mv.visitLineNumber(line, start);
+        }
+    }
+
+    /**
+      * Visits the maximum stack size and the maximum number of local variables of the method.
+      *
+      * @param maxStack maximum stack size of the method.
+      * @param maxLocals maximum number of local variables for the method.
+      */
+    public void visitMaxs(final int maxStack, final int maxLocals) {
+        if (mv != null) {
+            mv.visitMaxs(maxStack, maxLocals);
+        }
+    }
+
+    /**
+      * Visits the end of the method. This method, which is the last one to be called, is used to
+      * inform the visitor that all the annotations and attributes of the method have been visited.
+      */
+    public void visitEnd() {
+        if (mv != null) {
+            mv.visitEnd();
+        }
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/org/objectweb/asm/MethodWriter.class b/tests/test_data/std/jdk/internal/org/objectweb/asm/MethodWriter.class
new file mode 100644
index 0000000000000000000000000000000000000000..7df8abdeb2eb5df718c282f664111c9021335bb4
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HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/org/objectweb/asm/MethodWriter.java b/tests/test_data/std/jdk/internal/org/objectweb/asm/MethodWriter.java
new file mode 100644
index 00000000..efeffc7b
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/org/objectweb/asm/MethodWriter.java
@@ -0,0 +1,2426 @@
+/*
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/*
+ * This file is available under and governed by the GNU General Public
+ * License version 2 only, as published by the Free Software Foundation.
+ * However, the following notice accompanied the original version of this
+ * file:
+ *
+ * ASM: a very small and fast Java bytecode manipulation framework
+ * Copyright (c) 2000-2011 INRIA, France Telecom
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the copyright holders nor the names of its
+ *    contributors may be used to endorse or promote products derived from
+ *    this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+package jdk.internal.org.objectweb.asm;
+
+/**
+ * A {@link MethodVisitor} that generates a corresponding 'method_info' structure, as defined in the
+ * Java Virtual Machine Specification (JVMS).
+ *
+ * @see <a href="https://docs.oracle.com/javase/specs/jvms/se9/html/jvms-4.html#jvms-4.6">JVMS
+ *     4.6</a>
+ * @author Eric Bruneton
+ * @author Eugene Kuleshov
+ */
+final class MethodWriter extends MethodVisitor {
+
+    /** Indicates that nothing must be computed. */
+    static final int COMPUTE_NOTHING = 0;
+
+    /**
+      * Indicates that the maximum stack size and the maximum number of local variables must be
+      * computed, from scratch.
+      */
+    static final int COMPUTE_MAX_STACK_AND_LOCAL = 1;
+
+    /**
+      * Indicates that the maximum stack size and the maximum number of local variables must be
+      * computed, from the existing stack map frames. This can be done more efficiently than with the
+      * control flow graph algorithm used for {@link #COMPUTE_MAX_STACK_AND_LOCAL}, by using a linear
+      * scan of the bytecode instructions.
+      */
+    static final int COMPUTE_MAX_STACK_AND_LOCAL_FROM_FRAMES = 2;
+
+    /**
+      * Indicates that the stack map frames of type F_INSERT must be computed. The other frames are not
+      * computed. They should all be of type F_NEW and should be sufficient to compute the content of
+      * the F_INSERT frames, together with the bytecode instructions between a F_NEW and a F_INSERT
+      * frame - and without any knowledge of the type hierarchy (by definition of F_INSERT).
+      */
+    static final int COMPUTE_INSERTED_FRAMES = 3;
+
+    /**
+      * Indicates that all the stack map frames must be computed. In this case the maximum stack size
+      * and the maximum number of local variables is also computed.
+      */
+    static final int COMPUTE_ALL_FRAMES = 4;
+
+    /** Indicates that {@link #STACK_SIZE_DELTA} is not applicable (not constant or never used). */
+    private static final int NA = 0;
+
+    /**
+      * The stack size variation corresponding to each JVM opcode. The stack size variation for opcode
+      * 'o' is given by the array element at index 'o'.
+      *
+      * @see <a href="https://docs.oracle.com/javase/specs/jvms/se9/html/jvms-6.html">JVMS 6</a>
+      */
+    private static final int[] STACK_SIZE_DELTA = {
+        0, // nop = 0 (0x0)
+        1, // aconst_null = 1 (0x1)
+        1, // iconst_m1 = 2 (0x2)
+        1, // iconst_0 = 3 (0x3)
+        1, // iconst_1 = 4 (0x4)
+        1, // iconst_2 = 5 (0x5)
+        1, // iconst_3 = 6 (0x6)
+        1, // iconst_4 = 7 (0x7)
+        1, // iconst_5 = 8 (0x8)
+        2, // lconst_0 = 9 (0x9)
+        2, // lconst_1 = 10 (0xa)
+        1, // fconst_0 = 11 (0xb)
+        1, // fconst_1 = 12 (0xc)
+        1, // fconst_2 = 13 (0xd)
+        2, // dconst_0 = 14 (0xe)
+        2, // dconst_1 = 15 (0xf)
+        1, // bipush = 16 (0x10)
+        1, // sipush = 17 (0x11)
+        1, // ldc = 18 (0x12)
+        NA, // ldc_w = 19 (0x13)
+        NA, // ldc2_w = 20 (0x14)
+        1, // iload = 21 (0x15)
+        2, // lload = 22 (0x16)
+        1, // fload = 23 (0x17)
+        2, // dload = 24 (0x18)
+        1, // aload = 25 (0x19)
+        NA, // iload_0 = 26 (0x1a)
+        NA, // iload_1 = 27 (0x1b)
+        NA, // iload_2 = 28 (0x1c)
+        NA, // iload_3 = 29 (0x1d)
+        NA, // lload_0 = 30 (0x1e)
+        NA, // lload_1 = 31 (0x1f)
+        NA, // lload_2 = 32 (0x20)
+        NA, // lload_3 = 33 (0x21)
+        NA, // fload_0 = 34 (0x22)
+        NA, // fload_1 = 35 (0x23)
+        NA, // fload_2 = 36 (0x24)
+        NA, // fload_3 = 37 (0x25)
+        NA, // dload_0 = 38 (0x26)
+        NA, // dload_1 = 39 (0x27)
+        NA, // dload_2 = 40 (0x28)
+        NA, // dload_3 = 41 (0x29)
+        NA, // aload_0 = 42 (0x2a)
+        NA, // aload_1 = 43 (0x2b)
+        NA, // aload_2 = 44 (0x2c)
+        NA, // aload_3 = 45 (0x2d)
+        -1, // iaload = 46 (0x2e)
+        0, // laload = 47 (0x2f)
+        -1, // faload = 48 (0x30)
+        0, // daload = 49 (0x31)
+        -1, // aaload = 50 (0x32)
+        -1, // baload = 51 (0x33)
+        -1, // caload = 52 (0x34)
+        -1, // saload = 53 (0x35)
+        -1, // istore = 54 (0x36)
+        -2, // lstore = 55 (0x37)
+        -1, // fstore = 56 (0x38)
+        -2, // dstore = 57 (0x39)
+        -1, // astore = 58 (0x3a)
+        NA, // istore_0 = 59 (0x3b)
+        NA, // istore_1 = 60 (0x3c)
+        NA, // istore_2 = 61 (0x3d)
+        NA, // istore_3 = 62 (0x3e)
+        NA, // lstore_0 = 63 (0x3f)
+        NA, // lstore_1 = 64 (0x40)
+        NA, // lstore_2 = 65 (0x41)
+        NA, // lstore_3 = 66 (0x42)
+        NA, // fstore_0 = 67 (0x43)
+        NA, // fstore_1 = 68 (0x44)
+        NA, // fstore_2 = 69 (0x45)
+        NA, // fstore_3 = 70 (0x46)
+        NA, // dstore_0 = 71 (0x47)
+        NA, // dstore_1 = 72 (0x48)
+        NA, // dstore_2 = 73 (0x49)
+        NA, // dstore_3 = 74 (0x4a)
+        NA, // astore_0 = 75 (0x4b)
+        NA, // astore_1 = 76 (0x4c)
+        NA, // astore_2 = 77 (0x4d)
+        NA, // astore_3 = 78 (0x4e)
+        -3, // iastore = 79 (0x4f)
+        -4, // lastore = 80 (0x50)
+        -3, // fastore = 81 (0x51)
+        -4, // dastore = 82 (0x52)
+        -3, // aastore = 83 (0x53)
+        -3, // bastore = 84 (0x54)
+        -3, // castore = 85 (0x55)
+        -3, // sastore = 86 (0x56)
+        -1, // pop = 87 (0x57)
+        -2, // pop2 = 88 (0x58)
+        1, // dup = 89 (0x59)
+        1, // dup_x1 = 90 (0x5a)
+        1, // dup_x2 = 91 (0x5b)
+        2, // dup2 = 92 (0x5c)
+        2, // dup2_x1 = 93 (0x5d)
+        2, // dup2_x2 = 94 (0x5e)
+        0, // swap = 95 (0x5f)
+        -1, // iadd = 96 (0x60)
+        -2, // ladd = 97 (0x61)
+        -1, // fadd = 98 (0x62)
+        -2, // dadd = 99 (0x63)
+        -1, // isub = 100 (0x64)
+        -2, // lsub = 101 (0x65)
+        -1, // fsub = 102 (0x66)
+        -2, // dsub = 103 (0x67)
+        -1, // imul = 104 (0x68)
+        -2, // lmul = 105 (0x69)
+        -1, // fmul = 106 (0x6a)
+        -2, // dmul = 107 (0x6b)
+        -1, // idiv = 108 (0x6c)
+        -2, // ldiv = 109 (0x6d)
+        -1, // fdiv = 110 (0x6e)
+        -2, // ddiv = 111 (0x6f)
+        -1, // irem = 112 (0x70)
+        -2, // lrem = 113 (0x71)
+        -1, // frem = 114 (0x72)
+        -2, // drem = 115 (0x73)
+        0, // ineg = 116 (0x74)
+        0, // lneg = 117 (0x75)
+        0, // fneg = 118 (0x76)
+        0, // dneg = 119 (0x77)
+        -1, // ishl = 120 (0x78)
+        -1, // lshl = 121 (0x79)
+        -1, // ishr = 122 (0x7a)
+        -1, // lshr = 123 (0x7b)
+        -1, // iushr = 124 (0x7c)
+        -1, // lushr = 125 (0x7d)
+        -1, // iand = 126 (0x7e)
+        -2, // land = 127 (0x7f)
+        -1, // ior = 128 (0x80)
+        -2, // lor = 129 (0x81)
+        -1, // ixor = 130 (0x82)
+        -2, // lxor = 131 (0x83)
+        0, // iinc = 132 (0x84)
+        1, // i2l = 133 (0x85)
+        0, // i2f = 134 (0x86)
+        1, // i2d = 135 (0x87)
+        -1, // l2i = 136 (0x88)
+        -1, // l2f = 137 (0x89)
+        0, // l2d = 138 (0x8a)
+        0, // f2i = 139 (0x8b)
+        1, // f2l = 140 (0x8c)
+        1, // f2d = 141 (0x8d)
+        -1, // d2i = 142 (0x8e)
+        0, // d2l = 143 (0x8f)
+        -1, // d2f = 144 (0x90)
+        0, // i2b = 145 (0x91)
+        0, // i2c = 146 (0x92)
+        0, // i2s = 147 (0x93)
+        -3, // lcmp = 148 (0x94)
+        -1, // fcmpl = 149 (0x95)
+        -1, // fcmpg = 150 (0x96)
+        -3, // dcmpl = 151 (0x97)
+        -3, // dcmpg = 152 (0x98)
+        -1, // ifeq = 153 (0x99)
+        -1, // ifne = 154 (0x9a)
+        -1, // iflt = 155 (0x9b)
+        -1, // ifge = 156 (0x9c)
+        -1, // ifgt = 157 (0x9d)
+        -1, // ifle = 158 (0x9e)
+        -2, // if_icmpeq = 159 (0x9f)
+        -2, // if_icmpne = 160 (0xa0)
+        -2, // if_icmplt = 161 (0xa1)
+        -2, // if_icmpge = 162 (0xa2)
+        -2, // if_icmpgt = 163 (0xa3)
+        -2, // if_icmple = 164 (0xa4)
+        -2, // if_acmpeq = 165 (0xa5)
+        -2, // if_acmpne = 166 (0xa6)
+        0, // goto = 167 (0xa7)
+        1, // jsr = 168 (0xa8)
+        0, // ret = 169 (0xa9)
+        -1, // tableswitch = 170 (0xaa)
+        -1, // lookupswitch = 171 (0xab)
+        -1, // ireturn = 172 (0xac)
+        -2, // lreturn = 173 (0xad)
+        -1, // freturn = 174 (0xae)
+        -2, // dreturn = 175 (0xaf)
+        -1, // areturn = 176 (0xb0)
+        0, // return = 177 (0xb1)
+        NA, // getstatic = 178 (0xb2)
+        NA, // putstatic = 179 (0xb3)
+        NA, // getfield = 180 (0xb4)
+        NA, // putfield = 181 (0xb5)
+        NA, // invokevirtual = 182 (0xb6)
+        NA, // invokespecial = 183 (0xb7)
+        NA, // invokestatic = 184 (0xb8)
+        NA, // invokeinterface = 185 (0xb9)
+        NA, // invokedynamic = 186 (0xba)
+        1, // new = 187 (0xbb)
+        0, // newarray = 188 (0xbc)
+        0, // anewarray = 189 (0xbd)
+        0, // arraylength = 190 (0xbe)
+        NA, // athrow = 191 (0xbf)
+        0, // checkcast = 192 (0xc0)
+        0, // instanceof = 193 (0xc1)
+        -1, // monitorenter = 194 (0xc2)
+        -1, // monitorexit = 195 (0xc3)
+        NA, // wide = 196 (0xc4)
+        NA, // multianewarray = 197 (0xc5)
+        -1, // ifnull = 198 (0xc6)
+        -1, // ifnonnull = 199 (0xc7)
+        NA, // goto_w = 200 (0xc8)
+        NA // jsr_w = 201 (0xc9)
+    };
+
+    /** Where the constants used in this MethodWriter must be stored. */
+    private final SymbolTable symbolTable;
+
+    // Note: fields are ordered as in the method_info structure, and those related to attributes are
+    // ordered as in Section 4.7 of the JVMS.
+
+    /**
+      * The access_flags field of the method_info JVMS structure. This field can contain ASM specific
+      * access flags, such as {@link Opcodes#ACC_DEPRECATED}, which are removed when generating the
+      * ClassFile structure.
+      */
+    private final int accessFlags;
+
+    /** The name_index field of the method_info JVMS structure. */
+    private final int nameIndex;
+
+    /** The name of this method. */
+    private final String name;
+
+    /** The descriptor_index field of the method_info JVMS structure. */
+    private final int descriptorIndex;
+
+    /** The descriptor of this method. */
+    private final String descriptor;
+
+    // Code attribute fields and sub attributes:
+
+    /** The max_stack field of the Code attribute. */
+    private int maxStack;
+
+    /** The max_locals field of the Code attribute. */
+    private int maxLocals;
+
+    /** The 'code' field of the Code attribute. */
+    private final ByteVector code = new ByteVector();
+
+    /**
+      * The first element in the exception handler list (used to generate the exception_table of the
+      * Code attribute). The next ones can be accessed with the {@link Handler#nextHandler} field. May
+      * be {@literal null}.
+      */
+    private Handler firstHandler;
+
+    /**
+      * The last element in the exception handler list (used to generate the exception_table of the
+      * Code attribute). The next ones can be accessed with the {@link Handler#nextHandler} field. May
+      * be {@literal null}.
+      */
+    private Handler lastHandler;
+
+    /** The line_number_table_length field of the LineNumberTable code attribute. */
+    private int lineNumberTableLength;
+
+    /** The line_number_table array of the LineNumberTable code attribute, or {@literal null}. */
+    private ByteVector lineNumberTable;
+
+    /** The local_variable_table_length field of the LocalVariableTable code attribute. */
+    private int localVariableTableLength;
+
+    /**
+      * The local_variable_table array of the LocalVariableTable code attribute, or {@literal null}.
+      */
+    private ByteVector localVariableTable;
+
+    /** The local_variable_type_table_length field of the LocalVariableTypeTable code attribute. */
+    private int localVariableTypeTableLength;
+
+    /**
+      * The local_variable_type_table array of the LocalVariableTypeTable code attribute, or {@literal
+      * null}.
+      */
+    private ByteVector localVariableTypeTable;
+
+    /** The number_of_entries field of the StackMapTable code attribute. */
+    private int stackMapTableNumberOfEntries;
+
+    /** The 'entries' array of the StackMapTable code attribute. */
+    private ByteVector stackMapTableEntries;
+
+    /**
+      * The last runtime visible type annotation of the Code attribute. The previous ones can be
+      * accessed with the {@link AnnotationWriter#previousAnnotation} field. May be {@literal null}.
+      */
+    private AnnotationWriter lastCodeRuntimeVisibleTypeAnnotation;
+
+    /**
+      * The last runtime invisible type annotation of the Code attribute. The previous ones can be
+      * accessed with the {@link AnnotationWriter#previousAnnotation} field. May be {@literal null}.
+      */
+    private AnnotationWriter lastCodeRuntimeInvisibleTypeAnnotation;
+
+    /**
+      * The first non standard attribute of the Code attribute. The next ones can be accessed with the
+      * {@link Attribute#nextAttribute} field. May be {@literal null}.
+      *
+      * <p><b>WARNING</b>: this list stores the attributes in the <i>reverse</i> order of their visit.
+      * firstAttribute is actually the last attribute visited in {@link #visitAttribute}. The {@link
+      * #putMethodInfo} method writes the attributes in the order defined by this list, i.e. in the
+      * reverse order specified by the user.
+      */
+    private Attribute firstCodeAttribute;
+
+    // Other method_info attributes:
+
+    /** The number_of_exceptions field of the Exceptions attribute. */
+    private final int numberOfExceptions;
+
+    /** The exception_index_table array of the Exceptions attribute, or {@literal null}. */
+    private final int[] exceptionIndexTable;
+
+    /** The signature_index field of the Signature attribute. */
+    private final int signatureIndex;
+
+    /**
+      * The last runtime visible annotation of this method. The previous ones can be accessed with the
+      * {@link AnnotationWriter#previousAnnotation} field. May be {@literal null}.
+      */
+    private AnnotationWriter lastRuntimeVisibleAnnotation;
+
+    /**
+      * The last runtime invisible annotation of this method. The previous ones can be accessed with
+      * the {@link AnnotationWriter#previousAnnotation} field. May be {@literal null}.
+      */
+    private AnnotationWriter lastRuntimeInvisibleAnnotation;
+
+    /** The number of method parameters that can have runtime visible annotations, or 0. */
+    private int visibleAnnotableParameterCount;
+
+    /**
+      * The runtime visible parameter annotations of this method. Each array element contains the last
+      * annotation of a parameter (which can be {@literal null} - the previous ones can be accessed
+      * with the {@link AnnotationWriter#previousAnnotation} field). May be {@literal null}.
+      */
+    private AnnotationWriter[] lastRuntimeVisibleParameterAnnotations;
+
+    /** The number of method parameters that can have runtime visible annotations, or 0. */
+    private int invisibleAnnotableParameterCount;
+
+    /**
+      * The runtime invisible parameter annotations of this method. Each array element contains the
+      * last annotation of a parameter (which can be {@literal null} - the previous ones can be
+      * accessed with the {@link AnnotationWriter#previousAnnotation} field). May be {@literal null}.
+      */
+    private AnnotationWriter[] lastRuntimeInvisibleParameterAnnotations;
+
+    /**
+      * The last runtime visible type annotation of this method. The previous ones can be accessed with
+      * the {@link AnnotationWriter#previousAnnotation} field. May be {@literal null}.
+      */
+    private AnnotationWriter lastRuntimeVisibleTypeAnnotation;
+
+    /**
+      * The last runtime invisible type annotation of this method. The previous ones can be accessed
+      * with the {@link AnnotationWriter#previousAnnotation} field. May be {@literal null}.
+      */
+    private AnnotationWriter lastRuntimeInvisibleTypeAnnotation;
+
+    /** The default_value field of the AnnotationDefault attribute, or {@literal null}. */
+    private ByteVector defaultValue;
+
+    /** The parameters_count field of the MethodParameters attribute. */
+    private int parametersCount;
+
+    /** The 'parameters' array of the MethodParameters attribute, or {@literal null}. */
+    private ByteVector parameters;
+
+    /**
+      * The first non standard attribute of this method. The next ones can be accessed with the {@link
+      * Attribute#nextAttribute} field. May be {@literal null}.
+      *
+      * <p><b>WARNING</b>: this list stores the attributes in the <i>reverse</i> order of their visit.
+      * firstAttribute is actually the last attribute visited in {@link #visitAttribute}. The {@link
+      * #putMethodInfo} method writes the attributes in the order defined by this list, i.e. in the
+      * reverse order specified by the user.
+      */
+    private Attribute firstAttribute;
+
+    // -----------------------------------------------------------------------------------------------
+    // Fields used to compute the maximum stack size and number of locals, and the stack map frames
+    // -----------------------------------------------------------------------------------------------
+
+    /**
+      * Indicates what must be computed. Must be one of {@link #COMPUTE_ALL_FRAMES}, {@link
+      * #COMPUTE_INSERTED_FRAMES}, {@link COMPUTE_MAX_STACK_AND_LOCAL_FROM_FRAMES}, {@link
+      * #COMPUTE_MAX_STACK_AND_LOCAL} or {@link #COMPUTE_NOTHING}.
+      */
+    private final int compute;
+
+    /**
+      * The first basic block of the method. The next ones (in bytecode offset order) can be accessed
+      * with the {@link Label#nextBasicBlock} field.
+      */
+    private Label firstBasicBlock;
+
+    /**
+      * The last basic block of the method (in bytecode offset order). This field is updated each time
+      * a basic block is encountered, and is used to append it at the end of the basic block list.
+      */
+    private Label lastBasicBlock;
+
+    /**
+      * The current basic block, i.e. the basic block of the last visited instruction. When {@link
+      * #compute} is equal to {@link #COMPUTE_MAX_STACK_AND_LOCAL} or {@link #COMPUTE_ALL_FRAMES}, this
+      * field is {@literal null} for unreachable code. When {@link #compute} is equal to {@link
+      * #COMPUTE_MAX_STACK_AND_LOCAL_FROM_FRAMES} or {@link #COMPUTE_INSERTED_FRAMES}, this field stays
+      * unchanged throughout the whole method (i.e. the whole code is seen as a single basic block;
+      * indeed, the existing frames are sufficient by hypothesis to compute any intermediate frame -
+      * and the maximum stack size as well - without using any control flow graph).
+      */
+    private Label currentBasicBlock;
+
+    /**
+      * The relative stack size after the last visited instruction. This size is relative to the
+      * beginning of {@link #currentBasicBlock}, i.e. the true stack size after the last visited
+      * instruction is equal to the {@link Label#inputStackSize} of the current basic block plus {@link
+      * #relativeStackSize}. When {@link #compute} is equal to {@link
+      * #COMPUTE_MAX_STACK_AND_LOCAL_FROM_FRAMES}, {@link #currentBasicBlock} is always the start of
+      * the method, so this relative size is also equal to the absolute stack size after the last
+      * visited instruction.
+      */
+    private int relativeStackSize;
+
+    /**
+      * The maximum relative stack size after the last visited instruction. This size is relative to
+      * the beginning of {@link #currentBasicBlock}, i.e. the true maximum stack size after the last
+      * visited instruction is equal to the {@link Label#inputStackSize} of the current basic block
+      * plus {@link #maxRelativeStackSize}.When {@link #compute} is equal to {@link
+      * #COMPUTE_MAX_STACK_AND_LOCAL_FROM_FRAMES}, {@link #currentBasicBlock} is always the start of
+      * the method, so this relative size is also equal to the absolute maximum stack size after the
+      * last visited instruction.
+      */
+    private int maxRelativeStackSize;
+
+    /** The number of local variables in the last visited stack map frame. */
+    private int currentLocals;
+
+    /** The bytecode offset of the last frame that was written in {@link #stackMapTableEntries}. */
+    private int previousFrameOffset;
+
+    /**
+      * The last frame that was written in {@link #stackMapTableEntries}. This field has the same
+      * format as {@link #currentFrame}.
+      */
+    private int[] previousFrame;
+
+    /**
+      * The current stack map frame. The first element contains the bytecode offset of the instruction
+      * to which the frame corresponds, the second element is the number of locals and the third one is
+      * the number of stack elements. The local variables start at index 3 and are followed by the
+      * operand stack elements. In summary frame[0] = offset, frame[1] = numLocal, frame[2] = numStack.
+      * Local variables and operand stack entries contain abstract types, as defined in {@link Frame},
+      * but restricted to {@link Frame#CONSTANT_KIND}, {@link Frame#REFERENCE_KIND}, {@link
+      * Frame#UNINITIALIZED_KIND} or {@link Frame#FORWARD_UNINITIALIZED_KIND} abstract types. Long and
+      * double types use only one array entry.
+      */
+    private int[] currentFrame;
+
+    /** Whether this method contains subroutines. */
+    private boolean hasSubroutines;
+
+    // -----------------------------------------------------------------------------------------------
+    // Other miscellaneous status fields
+    // -----------------------------------------------------------------------------------------------
+
+    /** Whether the bytecode of this method contains ASM specific instructions. */
+    private boolean hasAsmInstructions;
+
+    /**
+      * The start offset of the last visited instruction. Used to set the offset field of type
+      * annotations of type 'offset_target' (see <a
+      * href="https://docs.oracle.com/javase/specs/jvms/se9/html/jvms-4.html#jvms-4.7.20.1">JVMS
+      * 4.7.20.1</a>).
+      */
+    private int lastBytecodeOffset;
+
+    /**
+      * The offset in bytes in {@link SymbolTable#getSource} from which the method_info for this method
+      * (excluding its first 6 bytes) must be copied, or 0.
+      */
+    private int sourceOffset;
+
+    /**
+      * The length in bytes in {@link SymbolTable#getSource} which must be copied to get the
+      * method_info for this method (excluding its first 6 bytes for access_flags, name_index and
+      * descriptor_index).
+      */
+    private int sourceLength;
+
+    // -----------------------------------------------------------------------------------------------
+    // Constructor and accessors
+    // -----------------------------------------------------------------------------------------------
+
+    /**
+      * Constructs a new {@link MethodWriter}.
+      *
+      * @param symbolTable where the constants used in this AnnotationWriter must be stored.
+      * @param access the method's access flags (see {@link Opcodes}).
+      * @param name the method's name.
+      * @param descriptor the method's descriptor (see {@link Type}).
+      * @param signature the method's signature. May be {@literal null}.
+      * @param exceptions the internal names of the method's exceptions. May be {@literal null}.
+      * @param compute indicates what must be computed (see #compute).
+      */
+    MethodWriter(
+            final SymbolTable symbolTable,
+            final int access,
+            final String name,
+            final String descriptor,
+            final String signature,
+            final String[] exceptions,
+            final int compute) {
+        super(/* latest api = */ Opcodes.ASM9);
+        this.symbolTable = symbolTable;
+        this.accessFlags = "<init>".equals(name) ? access | Constants.ACC_CONSTRUCTOR : access;
+        this.nameIndex = symbolTable.addConstantUtf8(name);
+        this.name = name;
+        this.descriptorIndex = symbolTable.addConstantUtf8(descriptor);
+        this.descriptor = descriptor;
+        this.signatureIndex = signature == null ? 0 : symbolTable.addConstantUtf8(signature);
+        if (exceptions != null && exceptions.length > 0) {
+            numberOfExceptions = exceptions.length;
+            this.exceptionIndexTable = new int[numberOfExceptions];
+            for (int i = 0; i < numberOfExceptions; ++i) {
+                this.exceptionIndexTable[i] = symbolTable.addConstantClass(exceptions[i]).index;
+            }
+        } else {
+            numberOfExceptions = 0;
+            this.exceptionIndexTable = null;
+        }
+        this.compute = compute;
+        if (compute != COMPUTE_NOTHING) {
+            // Update maxLocals and currentLocals.
+            int argumentsSize = Type.getArgumentsAndReturnSizes(descriptor) >> 2;
+            if ((access & Opcodes.ACC_STATIC) != 0) {
+                --argumentsSize;
+            }
+            maxLocals = argumentsSize;
+            currentLocals = argumentsSize;
+            // Create and visit the label for the first basic block.
+            firstBasicBlock = new Label();
+            visitLabel(firstBasicBlock);
+        }
+    }
+
+    boolean hasFrames() {
+        return stackMapTableNumberOfEntries > 0;
+    }
+
+    boolean hasAsmInstructions() {
+        return hasAsmInstructions;
+    }
+
+    // -----------------------------------------------------------------------------------------------
+    // Implementation of the MethodVisitor abstract class
+    // -----------------------------------------------------------------------------------------------
+
+    @Override
+    public void visitParameter(final String name, final int access) {
+        if (parameters == null) {
+            parameters = new ByteVector();
+        }
+        ++parametersCount;
+        parameters.putShort((name == null) ? 0 : symbolTable.addConstantUtf8(name)).putShort(access);
+    }
+
+    @Override
+    public AnnotationVisitor visitAnnotationDefault() {
+        defaultValue = new ByteVector();
+        return new AnnotationWriter(symbolTable, /* useNamedValues = */ false, defaultValue, null);
+    }
+
+    @Override
+    public AnnotationVisitor visitAnnotation(final String descriptor, final boolean visible) {
+        if (visible) {
+            return lastRuntimeVisibleAnnotation =
+                    AnnotationWriter.create(symbolTable, descriptor, lastRuntimeVisibleAnnotation);
+        } else {
+            return lastRuntimeInvisibleAnnotation =
+                    AnnotationWriter.create(symbolTable, descriptor, lastRuntimeInvisibleAnnotation);
+        }
+    }
+
+    @Override
+    public AnnotationVisitor visitTypeAnnotation(
+            final int typeRef, final TypePath typePath, final String descriptor, final boolean visible) {
+        if (visible) {
+            return lastRuntimeVisibleTypeAnnotation =
+                    AnnotationWriter.create(
+                            symbolTable, typeRef, typePath, descriptor, lastRuntimeVisibleTypeAnnotation);
+        } else {
+            return lastRuntimeInvisibleTypeAnnotation =
+                    AnnotationWriter.create(
+                            symbolTable, typeRef, typePath, descriptor, lastRuntimeInvisibleTypeAnnotation);
+        }
+    }
+
+    @Override
+    public void visitAnnotableParameterCount(final int parameterCount, final boolean visible) {
+        if (visible) {
+            visibleAnnotableParameterCount = parameterCount;
+        } else {
+            invisibleAnnotableParameterCount = parameterCount;
+        }
+    }
+
+    @Override
+    public AnnotationVisitor visitParameterAnnotation(
+            final int parameter, final String annotationDescriptor, final boolean visible) {
+        if (visible) {
+            if (lastRuntimeVisibleParameterAnnotations == null) {
+                lastRuntimeVisibleParameterAnnotations =
+                        new AnnotationWriter[Type.getArgumentCount(descriptor)];
+            }
+            return lastRuntimeVisibleParameterAnnotations[parameter] =
+                    AnnotationWriter.create(
+                            symbolTable, annotationDescriptor, lastRuntimeVisibleParameterAnnotations[parameter]);
+        } else {
+            if (lastRuntimeInvisibleParameterAnnotations == null) {
+                lastRuntimeInvisibleParameterAnnotations =
+                        new AnnotationWriter[Type.getArgumentCount(descriptor)];
+            }
+            return lastRuntimeInvisibleParameterAnnotations[parameter] =
+                    AnnotationWriter.create(
+                            symbolTable,
+                            annotationDescriptor,
+                            lastRuntimeInvisibleParameterAnnotations[parameter]);
+        }
+    }
+
+    @Override
+    public void visitAttribute(final Attribute attribute) {
+        // Store the attributes in the <i>reverse</i> order of their visit by this method.
+        if (attribute.isCodeAttribute()) {
+            attribute.nextAttribute = firstCodeAttribute;
+            firstCodeAttribute = attribute;
+        } else {
+            attribute.nextAttribute = firstAttribute;
+            firstAttribute = attribute;
+        }
+    }
+
+    @Override
+    public void visitCode() {
+        // Nothing to do.
+    }
+
+    @Override
+    public void visitFrame(
+            final int type,
+            final int numLocal,
+            final Object[] local,
+            final int numStack,
+            final Object[] stack) {
+        if (compute == COMPUTE_ALL_FRAMES) {
+            return;
+        }
+
+        if (compute == COMPUTE_INSERTED_FRAMES) {
+            if (currentBasicBlock.frame == null) {
+                // This should happen only once, for the implicit first frame (which is explicitly visited
+                // in ClassReader if the EXPAND_ASM_INSNS option is used - and COMPUTE_INSERTED_FRAMES
+                // can't be set if EXPAND_ASM_INSNS is not used).
+                currentBasicBlock.frame = new CurrentFrame(currentBasicBlock);
+                currentBasicBlock.frame.setInputFrameFromDescriptor(
+                        symbolTable, accessFlags, descriptor, numLocal);
+                currentBasicBlock.frame.accept(this);
+            } else {
+                if (type == Opcodes.F_NEW) {
+                    currentBasicBlock.frame.setInputFrameFromApiFormat(
+                            symbolTable, numLocal, local, numStack, stack);
+                }
+                // If type is not F_NEW then it is F_INSERT by hypothesis, and currentBlock.frame contains
+                // the stack map frame at the current instruction, computed from the last F_NEW frame and
+                // the bytecode instructions in between (via calls to CurrentFrame#execute).
+                currentBasicBlock.frame.accept(this);
+            }
+        } else if (type == Opcodes.F_NEW) {
+            if (previousFrame == null) {
+                int argumentsSize = Type.getArgumentsAndReturnSizes(descriptor) >> 2;
+                Frame implicitFirstFrame = new Frame(new Label());
+                implicitFirstFrame.setInputFrameFromDescriptor(
+                        symbolTable, accessFlags, descriptor, argumentsSize);
+                implicitFirstFrame.accept(this);
+            }
+            currentLocals = numLocal;
+            int frameIndex = visitFrameStart(code.length, numLocal, numStack);
+            for (int i = 0; i < numLocal; ++i) {
+                currentFrame[frameIndex++] = Frame.getAbstractTypeFromApiFormat(symbolTable, local[i]);
+            }
+            for (int i = 0; i < numStack; ++i) {
+                currentFrame[frameIndex++] = Frame.getAbstractTypeFromApiFormat(symbolTable, stack[i]);
+            }
+            visitFrameEnd();
+        } else {
+            if (symbolTable.getMajorVersion() < Opcodes.V1_6) {
+                throw new IllegalArgumentException("Class versions V1_5 or less must use F_NEW frames.");
+            }
+            int offsetDelta;
+            if (stackMapTableEntries == null) {
+                stackMapTableEntries = new ByteVector();
+                offsetDelta = code.length;
+            } else {
+                offsetDelta = code.length - previousFrameOffset - 1;
+                if (offsetDelta < 0) {
+                    if (type == Opcodes.F_SAME) {
+                        return;
+                    } else {
+                        throw new IllegalStateException();
+                    }
+                }
+            }
+
+            switch (type) {
+                case Opcodes.F_FULL:
+                    currentLocals = numLocal;
+                    stackMapTableEntries.putByte(Frame.FULL_FRAME).putShort(offsetDelta).putShort(numLocal);
+                    for (int i = 0; i < numLocal; ++i) {
+                        putFrameType(local[i]);
+                    }
+                    stackMapTableEntries.putShort(numStack);
+                    for (int i = 0; i < numStack; ++i) {
+                        putFrameType(stack[i]);
+                    }
+                    break;
+                case Opcodes.F_APPEND:
+                    currentLocals += numLocal;
+                    stackMapTableEntries.putByte(Frame.SAME_FRAME_EXTENDED + numLocal).putShort(offsetDelta);
+                    for (int i = 0; i < numLocal; ++i) {
+                        putFrameType(local[i]);
+                    }
+                    break;
+                case Opcodes.F_CHOP:
+                    currentLocals -= numLocal;
+                    stackMapTableEntries.putByte(Frame.SAME_FRAME_EXTENDED - numLocal).putShort(offsetDelta);
+                    break;
+                case Opcodes.F_SAME:
+                    if (offsetDelta < 64) {
+                        stackMapTableEntries.putByte(offsetDelta);
+                    } else {
+                        stackMapTableEntries.putByte(Frame.SAME_FRAME_EXTENDED).putShort(offsetDelta);
+                    }
+                    break;
+                case Opcodes.F_SAME1:
+                    if (offsetDelta < 64) {
+                        stackMapTableEntries.putByte(Frame.SAME_LOCALS_1_STACK_ITEM_FRAME + offsetDelta);
+                    } else {
+                        stackMapTableEntries
+                                .putByte(Frame.SAME_LOCALS_1_STACK_ITEM_FRAME_EXTENDED)
+                                .putShort(offsetDelta);
+                    }
+                    putFrameType(stack[0]);
+                    break;
+                default:
+                    throw new IllegalArgumentException();
+            }
+
+            previousFrameOffset = code.length;
+            ++stackMapTableNumberOfEntries;
+        }
+
+        if (compute == COMPUTE_MAX_STACK_AND_LOCAL_FROM_FRAMES) {
+            relativeStackSize = numStack;
+            for (int i = 0; i < numStack; ++i) {
+                if (stack[i] == Opcodes.LONG || stack[i] == Opcodes.DOUBLE) {
+                    relativeStackSize++;
+                }
+            }
+            if (relativeStackSize > maxRelativeStackSize) {
+                maxRelativeStackSize = relativeStackSize;
+            }
+        }
+
+        maxStack = Math.max(maxStack, numStack);
+        maxLocals = Math.max(maxLocals, currentLocals);
+    }
+
+    @Override
+    public void visitInsn(final int opcode) {
+        lastBytecodeOffset = code.length;
+        // Add the instruction to the bytecode of the method.
+        code.putByte(opcode);
+        // If needed, update the maximum stack size and number of locals, and stack map frames.
+        if (currentBasicBlock != null) {
+            if (compute == COMPUTE_ALL_FRAMES || compute == COMPUTE_INSERTED_FRAMES) {
+                currentBasicBlock.frame.execute(opcode, 0, null, null);
+            } else {
+                int size = relativeStackSize + STACK_SIZE_DELTA[opcode];
+                if (size > maxRelativeStackSize) {
+                    maxRelativeStackSize = size;
+                }
+                relativeStackSize = size;
+            }
+            if ((opcode >= Opcodes.IRETURN && opcode <= Opcodes.RETURN) || opcode == Opcodes.ATHROW) {
+                endCurrentBasicBlockWithNoSuccessor();
+            }
+        }
+    }
+
+    @Override
+    public void visitIntInsn(final int opcode, final int operand) {
+        lastBytecodeOffset = code.length;
+        // Add the instruction to the bytecode of the method.
+        if (opcode == Opcodes.SIPUSH) {
+            code.put12(opcode, operand);
+        } else { // BIPUSH or NEWARRAY
+            code.put11(opcode, operand);
+        }
+        // If needed, update the maximum stack size and number of locals, and stack map frames.
+        if (currentBasicBlock != null) {
+            if (compute == COMPUTE_ALL_FRAMES || compute == COMPUTE_INSERTED_FRAMES) {
+                currentBasicBlock.frame.execute(opcode, operand, null, null);
+            } else if (opcode != Opcodes.NEWARRAY) {
+                // The stack size delta is 1 for BIPUSH or SIPUSH, and 0 for NEWARRAY.
+                int size = relativeStackSize + 1;
+                if (size > maxRelativeStackSize) {
+                    maxRelativeStackSize = size;
+                }
+                relativeStackSize = size;
+            }
+        }
+    }
+
+    @Override
+    public void visitVarInsn(final int opcode, final int varIndex) {
+        lastBytecodeOffset = code.length;
+        // Add the instruction to the bytecode of the method.
+        if (varIndex < 4 && opcode != Opcodes.RET) {
+            int optimizedOpcode;
+            if (opcode < Opcodes.ISTORE) {
+                optimizedOpcode = Constants.ILOAD_0 + ((opcode - Opcodes.ILOAD) << 2) + varIndex;
+            } else {
+                optimizedOpcode = Constants.ISTORE_0 + ((opcode - Opcodes.ISTORE) << 2) + varIndex;
+            }
+            code.putByte(optimizedOpcode);
+        } else if (varIndex >= 256) {
+            code.putByte(Constants.WIDE).put12(opcode, varIndex);
+        } else {
+            code.put11(opcode, varIndex);
+        }
+        // If needed, update the maximum stack size and number of locals, and stack map frames.
+        if (currentBasicBlock != null) {
+            if (compute == COMPUTE_ALL_FRAMES || compute == COMPUTE_INSERTED_FRAMES) {
+                currentBasicBlock.frame.execute(opcode, varIndex, null, null);
+            } else {
+                if (opcode == Opcodes.RET) {
+                    // No stack size delta.
+                    currentBasicBlock.flags |= Label.FLAG_SUBROUTINE_END;
+                    currentBasicBlock.outputStackSize = (short) relativeStackSize;
+                    endCurrentBasicBlockWithNoSuccessor();
+                } else { // xLOAD or xSTORE
+                    int size = relativeStackSize + STACK_SIZE_DELTA[opcode];
+                    if (size > maxRelativeStackSize) {
+                        maxRelativeStackSize = size;
+                    }
+                    relativeStackSize = size;
+                }
+            }
+        }
+        if (compute != COMPUTE_NOTHING) {
+            int currentMaxLocals;
+            if (opcode == Opcodes.LLOAD
+                    || opcode == Opcodes.DLOAD
+                    || opcode == Opcodes.LSTORE
+                    || opcode == Opcodes.DSTORE) {
+                currentMaxLocals = varIndex + 2;
+            } else {
+                currentMaxLocals = varIndex + 1;
+            }
+            if (currentMaxLocals > maxLocals) {
+                maxLocals = currentMaxLocals;
+            }
+        }
+        if (opcode >= Opcodes.ISTORE && compute == COMPUTE_ALL_FRAMES && firstHandler != null) {
+            // If there are exception handler blocks, each instruction within a handler range is, in
+            // theory, a basic block (since execution can jump from this instruction to the exception
+            // handler). As a consequence, the local variable types at the beginning of the handler
+            // block should be the merge of the local variable types at all the instructions within the
+            // handler range. However, instead of creating a basic block for each instruction, we can
+            // get the same result in a more efficient way. Namely, by starting a new basic block after
+            // each xSTORE instruction, which is what we do here.
+            visitLabel(new Label());
+        }
+    }
+
+    @Override
+    public void visitTypeInsn(final int opcode, final String type) {
+        lastBytecodeOffset = code.length;
+        // Add the instruction to the bytecode of the method.
+        Symbol typeSymbol = symbolTable.addConstantClass(type);
+        code.put12(opcode, typeSymbol.index);
+        // If needed, update the maximum stack size and number of locals, and stack map frames.
+        if (currentBasicBlock != null) {
+            if (compute == COMPUTE_ALL_FRAMES || compute == COMPUTE_INSERTED_FRAMES) {
+                currentBasicBlock.frame.execute(opcode, lastBytecodeOffset, typeSymbol, symbolTable);
+            } else if (opcode == Opcodes.NEW) {
+                // The stack size delta is 1 for NEW, and 0 for ANEWARRAY, CHECKCAST, or INSTANCEOF.
+                int size = relativeStackSize + 1;
+                if (size > maxRelativeStackSize) {
+                    maxRelativeStackSize = size;
+                }
+                relativeStackSize = size;
+            }
+        }
+    }
+
+    @Override
+    public void visitFieldInsn(
+            final int opcode, final String owner, final String name, final String descriptor) {
+        lastBytecodeOffset = code.length;
+        // Add the instruction to the bytecode of the method.
+        Symbol fieldrefSymbol = symbolTable.addConstantFieldref(owner, name, descriptor);
+        code.put12(opcode, fieldrefSymbol.index);
+        // If needed, update the maximum stack size and number of locals, and stack map frames.
+        if (currentBasicBlock != null) {
+            if (compute == COMPUTE_ALL_FRAMES || compute == COMPUTE_INSERTED_FRAMES) {
+                currentBasicBlock.frame.execute(opcode, 0, fieldrefSymbol, symbolTable);
+            } else {
+                int size;
+                char firstDescChar = descriptor.charAt(0);
+                switch (opcode) {
+                    case Opcodes.GETSTATIC:
+                        size = relativeStackSize + (firstDescChar == 'D' || firstDescChar == 'J' ? 2 : 1);
+                        break;
+                    case Opcodes.PUTSTATIC:
+                        size = relativeStackSize + (firstDescChar == 'D' || firstDescChar == 'J' ? -2 : -1);
+                        break;
+                    case Opcodes.GETFIELD:
+                        size = relativeStackSize + (firstDescChar == 'D' || firstDescChar == 'J' ? 1 : 0);
+                        break;
+                    case Opcodes.PUTFIELD:
+                    default:
+                        size = relativeStackSize + (firstDescChar == 'D' || firstDescChar == 'J' ? -3 : -2);
+                        break;
+                }
+                if (size > maxRelativeStackSize) {
+                    maxRelativeStackSize = size;
+                }
+                relativeStackSize = size;
+            }
+        }
+    }
+
+    @Override
+    public void visitMethodInsn(
+            final int opcode,
+            final String owner,
+            final String name,
+            final String descriptor,
+            final boolean isInterface) {
+        lastBytecodeOffset = code.length;
+        // Add the instruction to the bytecode of the method.
+        Symbol methodrefSymbol = symbolTable.addConstantMethodref(owner, name, descriptor, isInterface);
+        if (opcode == Opcodes.INVOKEINTERFACE) {
+            code.put12(Opcodes.INVOKEINTERFACE, methodrefSymbol.index)
+                    .put11(methodrefSymbol.getArgumentsAndReturnSizes() >> 2, 0);
+        } else {
+            code.put12(opcode, methodrefSymbol.index);
+        }
+        // If needed, update the maximum stack size and number of locals, and stack map frames.
+        if (currentBasicBlock != null) {
+            if (compute == COMPUTE_ALL_FRAMES || compute == COMPUTE_INSERTED_FRAMES) {
+                currentBasicBlock.frame.execute(opcode, 0, methodrefSymbol, symbolTable);
+            } else {
+                int argumentsAndReturnSize = methodrefSymbol.getArgumentsAndReturnSizes();
+                int stackSizeDelta = (argumentsAndReturnSize & 3) - (argumentsAndReturnSize >> 2);
+                int size;
+                if (opcode == Opcodes.INVOKESTATIC) {
+                    size = relativeStackSize + stackSizeDelta + 1;
+                } else {
+                    size = relativeStackSize + stackSizeDelta;
+                }
+                if (size > maxRelativeStackSize) {
+                    maxRelativeStackSize = size;
+                }
+                relativeStackSize = size;
+            }
+        }
+    }
+
+    @Override
+    public void visitInvokeDynamicInsn(
+            final String name,
+            final String descriptor,
+            final Handle bootstrapMethodHandle,
+            final Object... bootstrapMethodArguments) {
+        lastBytecodeOffset = code.length;
+        // Add the instruction to the bytecode of the method.
+        Symbol invokeDynamicSymbol =
+                symbolTable.addConstantInvokeDynamic(
+                        name, descriptor, bootstrapMethodHandle, bootstrapMethodArguments);
+        code.put12(Opcodes.INVOKEDYNAMIC, invokeDynamicSymbol.index);
+        code.putShort(0);
+        // If needed, update the maximum stack size and number of locals, and stack map frames.
+        if (currentBasicBlock != null) {
+            if (compute == COMPUTE_ALL_FRAMES || compute == COMPUTE_INSERTED_FRAMES) {
+                currentBasicBlock.frame.execute(Opcodes.INVOKEDYNAMIC, 0, invokeDynamicSymbol, symbolTable);
+            } else {
+                int argumentsAndReturnSize = invokeDynamicSymbol.getArgumentsAndReturnSizes();
+                int stackSizeDelta = (argumentsAndReturnSize & 3) - (argumentsAndReturnSize >> 2) + 1;
+                int size = relativeStackSize + stackSizeDelta;
+                if (size > maxRelativeStackSize) {
+                    maxRelativeStackSize = size;
+                }
+                relativeStackSize = size;
+            }
+        }
+    }
+
+    @Override
+    public void visitJumpInsn(final int opcode, final Label label) {
+        lastBytecodeOffset = code.length;
+        // Add the instruction to the bytecode of the method.
+        // Compute the 'base' opcode, i.e. GOTO or JSR if opcode is GOTO_W or JSR_W, otherwise opcode.
+        int baseOpcode =
+                opcode >= Constants.GOTO_W ? opcode - Constants.WIDE_JUMP_OPCODE_DELTA : opcode;
+        boolean nextInsnIsJumpTarget = false;
+        if ((label.flags & Label.FLAG_RESOLVED) != 0
+                && label.bytecodeOffset - code.length < Short.MIN_VALUE) {
+            // Case of a backward jump with an offset < -32768. In this case we automatically replace GOTO
+            // with GOTO_W, JSR with JSR_W and IFxxx <l> with IFNOTxxx <L> GOTO_W <l> L:..., where
+            // IFNOTxxx is the "opposite" opcode of IFxxx (e.g. IFNE for IFEQ) and where <L> designates
+            // the instruction just after the GOTO_W.
+            if (baseOpcode == Opcodes.GOTO) {
+                code.putByte(Constants.GOTO_W);
+            } else if (baseOpcode == Opcodes.JSR) {
+                code.putByte(Constants.JSR_W);
+            } else {
+                // Put the "opposite" opcode of baseOpcode. This can be done by flipping the least
+                // significant bit for IFNULL and IFNONNULL, and similarly for IFEQ ... IF_ACMPEQ (with a
+                // pre and post offset by 1). The jump offset is 8 bytes (3 for IFNOTxxx, 5 for GOTO_W).
+                code.putByte(baseOpcode >= Opcodes.IFNULL ? baseOpcode ^ 1 : ((baseOpcode + 1) ^ 1) - 1);
+                code.putShort(8);
+                // Here we could put a GOTO_W in theory, but if ASM specific instructions are used in this
+                // method or another one, and if the class has frames, we will need to insert a frame after
+                // this GOTO_W during the additional ClassReader -> ClassWriter round trip to remove the ASM
+                // specific instructions. To not miss this additional frame, we need to use an ASM_GOTO_W
+                // here, which has the unfortunate effect of forcing this additional round trip (which in
+                // some case would not have been really necessary, but we can't know this at this point).
+                code.putByte(Constants.ASM_GOTO_W);
+                hasAsmInstructions = true;
+                // The instruction after the GOTO_W becomes the target of the IFNOT instruction.
+                nextInsnIsJumpTarget = true;
+            }
+            label.put(code, code.length - 1, true);
+        } else if (baseOpcode != opcode) {
+            // Case of a GOTO_W or JSR_W specified by the user (normally ClassReader when used to remove
+            // ASM specific instructions). In this case we keep the original instruction.
+            code.putByte(opcode);
+            label.put(code, code.length - 1, true);
+        } else {
+            // Case of a jump with an offset >= -32768, or of a jump with an unknown offset. In these
+            // cases we store the offset in 2 bytes (which will be increased via a ClassReader ->
+            // ClassWriter round trip if it turns out that 2 bytes are not sufficient).
+            code.putByte(baseOpcode);
+            label.put(code, code.length - 1, false);
+        }
+
+        // If needed, update the maximum stack size and number of locals, and stack map frames.
+        if (currentBasicBlock != null) {
+            Label nextBasicBlock = null;
+            if (compute == COMPUTE_ALL_FRAMES) {
+                currentBasicBlock.frame.execute(baseOpcode, 0, null, null);
+                // Record the fact that 'label' is the target of a jump instruction.
+                label.getCanonicalInstance().flags |= Label.FLAG_JUMP_TARGET;
+                // Add 'label' as a successor of the current basic block.
+                addSuccessorToCurrentBasicBlock(Edge.JUMP, label);
+                if (baseOpcode != Opcodes.GOTO) {
+                    // The next instruction starts a new basic block (except for GOTO: by default the code
+                    // following a goto is unreachable - unless there is an explicit label for it - and we
+                    // should not compute stack frame types for its instructions).
+                    nextBasicBlock = new Label();
+                }
+            } else if (compute == COMPUTE_INSERTED_FRAMES) {
+                currentBasicBlock.frame.execute(baseOpcode, 0, null, null);
+            } else if (compute == COMPUTE_MAX_STACK_AND_LOCAL_FROM_FRAMES) {
+                // No need to update maxRelativeStackSize (the stack size delta is always negative).
+                relativeStackSize += STACK_SIZE_DELTA[baseOpcode];
+            } else {
+                if (baseOpcode == Opcodes.JSR) {
+                    // Record the fact that 'label' designates a subroutine, if not already done.
+                    if ((label.flags & Label.FLAG_SUBROUTINE_START) == 0) {
+                        label.flags |= Label.FLAG_SUBROUTINE_START;
+                        hasSubroutines = true;
+                    }
+                    currentBasicBlock.flags |= Label.FLAG_SUBROUTINE_CALLER;
+                    // Note that, by construction in this method, a block which calls a subroutine has at
+                    // least two successors in the control flow graph: the first one (added below) leads to
+                    // the instruction after the JSR, while the second one (added here) leads to the JSR
+                    // target. Note that the first successor is virtual (it does not correspond to a possible
+                    // execution path): it is only used to compute the successors of the basic blocks ending
+                    // with a ret, in {@link Label#addSubroutineRetSuccessors}.
+                    addSuccessorToCurrentBasicBlock(relativeStackSize + 1, label);
+                    // The instruction after the JSR starts a new basic block.
+                    nextBasicBlock = new Label();
+                } else {
+                    // No need to update maxRelativeStackSize (the stack size delta is always negative).
+                    relativeStackSize += STACK_SIZE_DELTA[baseOpcode];
+                    addSuccessorToCurrentBasicBlock(relativeStackSize, label);
+                }
+            }
+            // If the next instruction starts a new basic block, call visitLabel to add the label of this
+            // instruction as a successor of the current block, and to start a new basic block.
+            if (nextBasicBlock != null) {
+                if (nextInsnIsJumpTarget) {
+                    nextBasicBlock.flags |= Label.FLAG_JUMP_TARGET;
+                }
+                visitLabel(nextBasicBlock);
+            }
+            if (baseOpcode == Opcodes.GOTO) {
+                endCurrentBasicBlockWithNoSuccessor();
+            }
+        }
+    }
+
+    @Override
+    public void visitLabel(final Label label) {
+        // Resolve the forward references to this label, if any.
+        hasAsmInstructions |= label.resolve(code.data, stackMapTableEntries, code.length);
+        // visitLabel starts a new basic block (except for debug only labels), so we need to update the
+        // previous and current block references and list of successors.
+        if ((label.flags & Label.FLAG_DEBUG_ONLY) != 0) {
+            return;
+        }
+        if (compute == COMPUTE_ALL_FRAMES) {
+            if (currentBasicBlock != null) {
+                if (label.bytecodeOffset == currentBasicBlock.bytecodeOffset) {
+                    // We use {@link Label#getCanonicalInstance} to store the state of a basic block in only
+                    // one place, but this does not work for labels which have not been visited yet.
+                    // Therefore, when we detect here two labels having the same bytecode offset, we need to
+                    // - consolidate the state scattered in these two instances into the canonical instance:
+                    currentBasicBlock.flags |= (short)(label.flags & Label.FLAG_JUMP_TARGET);
+                    // - make sure the two instances share the same Frame instance (the implementation of
+                    // {@link Label#getCanonicalInstance} relies on this property; here label.frame should be
+                    // null):
+                    label.frame = currentBasicBlock.frame;
+                    // - and make sure to NOT assign 'label' into 'currentBasicBlock' or 'lastBasicBlock', so
+                    // that they still refer to the canonical instance for this bytecode offset.
+                    return;
+                }
+                // End the current basic block (with one new successor).
+                addSuccessorToCurrentBasicBlock(Edge.JUMP, label);
+            }
+            // Append 'label' at the end of the basic block list.
+            if (lastBasicBlock != null) {
+                if (label.bytecodeOffset == lastBasicBlock.bytecodeOffset) {
+                    // Same comment as above.
+                    lastBasicBlock.flags |= (short)(label.flags & Label.FLAG_JUMP_TARGET);
+                    // Here label.frame should be null.
+                    label.frame = lastBasicBlock.frame;
+                    currentBasicBlock = lastBasicBlock;
+                    return;
+                }
+                lastBasicBlock.nextBasicBlock = label;
+            }
+            lastBasicBlock = label;
+            // Make it the new current basic block.
+            currentBasicBlock = label;
+            // Here label.frame should be null.
+            label.frame = new Frame(label);
+        } else if (compute == COMPUTE_INSERTED_FRAMES) {
+            if (currentBasicBlock == null) {
+                // This case should happen only once, for the visitLabel call in the constructor. Indeed, if
+                // compute is equal to COMPUTE_INSERTED_FRAMES, currentBasicBlock stays unchanged.
+                currentBasicBlock = label;
+            } else {
+                // Update the frame owner so that a correct frame offset is computed in Frame.accept().
+                currentBasicBlock.frame.owner = label;
+            }
+        } else if (compute == COMPUTE_MAX_STACK_AND_LOCAL) {
+            if (currentBasicBlock != null) {
+                // End the current basic block (with one new successor).
+                currentBasicBlock.outputStackMax = (short) maxRelativeStackSize;
+                addSuccessorToCurrentBasicBlock(relativeStackSize, label);
+            }
+            // Start a new current basic block, and reset the current and maximum relative stack sizes.
+            currentBasicBlock = label;
+            relativeStackSize = 0;
+            maxRelativeStackSize = 0;
+            // Append the new basic block at the end of the basic block list.
+            if (lastBasicBlock != null) {
+                lastBasicBlock.nextBasicBlock = label;
+            }
+            lastBasicBlock = label;
+        } else if (compute == COMPUTE_MAX_STACK_AND_LOCAL_FROM_FRAMES && currentBasicBlock == null) {
+            // This case should happen only once, for the visitLabel call in the constructor. Indeed, if
+            // compute is equal to COMPUTE_MAX_STACK_AND_LOCAL_FROM_FRAMES, currentBasicBlock stays
+            // unchanged.
+            currentBasicBlock = label;
+        }
+    }
+
+    @Override
+    public void visitLdcInsn(final Object value) {
+        lastBytecodeOffset = code.length;
+        // Add the instruction to the bytecode of the method.
+        Symbol constantSymbol = symbolTable.addConstant(value);
+        int constantIndex = constantSymbol.index;
+        char firstDescriptorChar;
+        boolean isLongOrDouble =
+                constantSymbol.tag == Symbol.CONSTANT_LONG_TAG
+                        || constantSymbol.tag == Symbol.CONSTANT_DOUBLE_TAG
+                        || (constantSymbol.tag == Symbol.CONSTANT_DYNAMIC_TAG
+                                && ((firstDescriptorChar = constantSymbol.value.charAt(0)) == 'J'
+                                        || firstDescriptorChar == 'D'));
+        if (isLongOrDouble) {
+            code.put12(Constants.LDC2_W, constantIndex);
+        } else if (constantIndex >= 256) {
+            code.put12(Constants.LDC_W, constantIndex);
+        } else {
+            code.put11(Opcodes.LDC, constantIndex);
+        }
+        // If needed, update the maximum stack size and number of locals, and stack map frames.
+        if (currentBasicBlock != null) {
+            if (compute == COMPUTE_ALL_FRAMES || compute == COMPUTE_INSERTED_FRAMES) {
+                currentBasicBlock.frame.execute(Opcodes.LDC, 0, constantSymbol, symbolTable);
+            } else {
+                int size = relativeStackSize + (isLongOrDouble ? 2 : 1);
+                if (size > maxRelativeStackSize) {
+                    maxRelativeStackSize = size;
+                }
+                relativeStackSize = size;
+            }
+        }
+    }
+
+    @Override
+    public void visitIincInsn(final int varIndex, final int increment) {
+        lastBytecodeOffset = code.length;
+        // Add the instruction to the bytecode of the method.
+        if ((varIndex > 255) || (increment > 127) || (increment < -128)) {
+            code.putByte(Constants.WIDE).put12(Opcodes.IINC, varIndex).putShort(increment);
+        } else {
+            code.putByte(Opcodes.IINC).put11(varIndex, increment);
+        }
+        // If needed, update the maximum stack size and number of locals, and stack map frames.
+        if (currentBasicBlock != null
+                && (compute == COMPUTE_ALL_FRAMES || compute == COMPUTE_INSERTED_FRAMES)) {
+            currentBasicBlock.frame.execute(Opcodes.IINC, varIndex, null, null);
+        }
+        if (compute != COMPUTE_NOTHING) {
+            int currentMaxLocals = varIndex + 1;
+            if (currentMaxLocals > maxLocals) {
+                maxLocals = currentMaxLocals;
+            }
+        }
+    }
+
+    @Override
+    public void visitTableSwitchInsn(
+            final int min, final int max, final Label dflt, final Label... labels) {
+        lastBytecodeOffset = code.length;
+        // Add the instruction to the bytecode of the method.
+        code.putByte(Opcodes.TABLESWITCH).putByteArray(null, 0, (4 - code.length % 4) % 4);
+        dflt.put(code, lastBytecodeOffset, true);
+        code.putInt(min).putInt(max);
+        for (Label label : labels) {
+            label.put(code, lastBytecodeOffset, true);
+        }
+        // If needed, update the maximum stack size and number of locals, and stack map frames.
+        visitSwitchInsn(dflt, labels);
+    }
+
+    @Override
+    public void visitLookupSwitchInsn(final Label dflt, final int[] keys, final Label[] labels) {
+        lastBytecodeOffset = code.length;
+        // Add the instruction to the bytecode of the method.
+        code.putByte(Opcodes.LOOKUPSWITCH).putByteArray(null, 0, (4 - code.length % 4) % 4);
+        dflt.put(code, lastBytecodeOffset, true);
+        code.putInt(labels.length);
+        for (int i = 0; i < labels.length; ++i) {
+            code.putInt(keys[i]);
+            labels[i].put(code, lastBytecodeOffset, true);
+        }
+        // If needed, update the maximum stack size and number of locals, and stack map frames.
+        visitSwitchInsn(dflt, labels);
+    }
+
+    private void visitSwitchInsn(final Label dflt, final Label[] labels) {
+        if (currentBasicBlock != null) {
+            if (compute == COMPUTE_ALL_FRAMES) {
+                currentBasicBlock.frame.execute(Opcodes.LOOKUPSWITCH, 0, null, null);
+                // Add all the labels as successors of the current basic block.
+                addSuccessorToCurrentBasicBlock(Edge.JUMP, dflt);
+                dflt.getCanonicalInstance().flags |= Label.FLAG_JUMP_TARGET;
+                for (Label label : labels) {
+                    addSuccessorToCurrentBasicBlock(Edge.JUMP, label);
+                    label.getCanonicalInstance().flags |= Label.FLAG_JUMP_TARGET;
+                }
+            } else if (compute == COMPUTE_MAX_STACK_AND_LOCAL) {
+                // No need to update maxRelativeStackSize (the stack size delta is always negative).
+                --relativeStackSize;
+                // Add all the labels as successors of the current basic block.
+                addSuccessorToCurrentBasicBlock(relativeStackSize, dflt);
+                for (Label label : labels) {
+                    addSuccessorToCurrentBasicBlock(relativeStackSize, label);
+                }
+            }
+            // End the current basic block.
+            endCurrentBasicBlockWithNoSuccessor();
+        }
+    }
+
+    @Override
+    public void visitMultiANewArrayInsn(final String descriptor, final int numDimensions) {
+        lastBytecodeOffset = code.length;
+        // Add the instruction to the bytecode of the method.
+        Symbol descSymbol = symbolTable.addConstantClass(descriptor);
+        code.put12(Opcodes.MULTIANEWARRAY, descSymbol.index).putByte(numDimensions);
+        // If needed, update the maximum stack size and number of locals, and stack map frames.
+        if (currentBasicBlock != null) {
+            if (compute == COMPUTE_ALL_FRAMES || compute == COMPUTE_INSERTED_FRAMES) {
+                currentBasicBlock.frame.execute(
+                        Opcodes.MULTIANEWARRAY, numDimensions, descSymbol, symbolTable);
+            } else {
+                // No need to update maxRelativeStackSize (the stack size delta is always negative).
+                relativeStackSize += 1 - numDimensions;
+            }
+        }
+    }
+
+    @Override
+    public AnnotationVisitor visitInsnAnnotation(
+            final int typeRef, final TypePath typePath, final String descriptor, final boolean visible) {
+        if (visible) {
+            return lastCodeRuntimeVisibleTypeAnnotation =
+                    AnnotationWriter.create(
+                            symbolTable,
+                            (typeRef & 0xFF0000FF) | (lastBytecodeOffset << 8),
+                            typePath,
+                            descriptor,
+                            lastCodeRuntimeVisibleTypeAnnotation);
+        } else {
+            return lastCodeRuntimeInvisibleTypeAnnotation =
+                    AnnotationWriter.create(
+                            symbolTable,
+                            (typeRef & 0xFF0000FF) | (lastBytecodeOffset << 8),
+                            typePath,
+                            descriptor,
+                            lastCodeRuntimeInvisibleTypeAnnotation);
+        }
+    }
+
+    @Override
+    public void visitTryCatchBlock(
+            final Label start, final Label end, final Label handler, final String type) {
+        Handler newHandler =
+                new Handler(
+                        start, end, handler, type != null ? symbolTable.addConstantClass(type).index : 0, type);
+        if (firstHandler == null) {
+            firstHandler = newHandler;
+        } else {
+            lastHandler.nextHandler = newHandler;
+        }
+        lastHandler = newHandler;
+    }
+
+    @Override
+    public AnnotationVisitor visitTryCatchAnnotation(
+            final int typeRef, final TypePath typePath, final String descriptor, final boolean visible) {
+        if (visible) {
+            return lastCodeRuntimeVisibleTypeAnnotation =
+                    AnnotationWriter.create(
+                            symbolTable, typeRef, typePath, descriptor, lastCodeRuntimeVisibleTypeAnnotation);
+        } else {
+            return lastCodeRuntimeInvisibleTypeAnnotation =
+                    AnnotationWriter.create(
+                            symbolTable, typeRef, typePath, descriptor, lastCodeRuntimeInvisibleTypeAnnotation);
+        }
+    }
+
+    @Override
+    public void visitLocalVariable(
+            final String name,
+            final String descriptor,
+            final String signature,
+            final Label start,
+            final Label end,
+            final int index) {
+        if (signature != null) {
+            if (localVariableTypeTable == null) {
+                localVariableTypeTable = new ByteVector();
+            }
+            ++localVariableTypeTableLength;
+            localVariableTypeTable
+                    .putShort(start.bytecodeOffset)
+                    .putShort(end.bytecodeOffset - start.bytecodeOffset)
+                    .putShort(symbolTable.addConstantUtf8(name))
+                    .putShort(symbolTable.addConstantUtf8(signature))
+                    .putShort(index);
+        }
+        if (localVariableTable == null) {
+            localVariableTable = new ByteVector();
+        }
+        ++localVariableTableLength;
+        localVariableTable
+                .putShort(start.bytecodeOffset)
+                .putShort(end.bytecodeOffset - start.bytecodeOffset)
+                .putShort(symbolTable.addConstantUtf8(name))
+                .putShort(symbolTable.addConstantUtf8(descriptor))
+                .putShort(index);
+        if (compute != COMPUTE_NOTHING) {
+            char firstDescChar = descriptor.charAt(0);
+            int currentMaxLocals = index + (firstDescChar == 'J' || firstDescChar == 'D' ? 2 : 1);
+            if (currentMaxLocals > maxLocals) {
+                maxLocals = currentMaxLocals;
+            }
+        }
+    }
+
+    @Override
+    public AnnotationVisitor visitLocalVariableAnnotation(
+            final int typeRef,
+            final TypePath typePath,
+            final Label[] start,
+            final Label[] end,
+            final int[] index,
+            final String descriptor,
+            final boolean visible) {
+        // Create a ByteVector to hold a 'type_annotation' JVMS structure.
+        // See https://docs.oracle.com/javase/specs/jvms/se9/html/jvms-4.html#jvms-4.7.20.
+        ByteVector typeAnnotation = new ByteVector();
+        // Write target_type, target_info, and target_path.
+        typeAnnotation.putByte(typeRef >>> 24).putShort(start.length);
+        for (int i = 0; i < start.length; ++i) {
+            typeAnnotation
+                    .putShort(start[i].bytecodeOffset)
+                    .putShort(end[i].bytecodeOffset - start[i].bytecodeOffset)
+                    .putShort(index[i]);
+        }
+        TypePath.put(typePath, typeAnnotation);
+        // Write type_index and reserve space for num_element_value_pairs.
+        typeAnnotation.putShort(symbolTable.addConstantUtf8(descriptor)).putShort(0);
+        if (visible) {
+            return lastCodeRuntimeVisibleTypeAnnotation =
+                    new AnnotationWriter(
+                            symbolTable,
+                            /* useNamedValues = */ true,
+                            typeAnnotation,
+                            lastCodeRuntimeVisibleTypeAnnotation);
+        } else {
+            return lastCodeRuntimeInvisibleTypeAnnotation =
+                    new AnnotationWriter(
+                            symbolTable,
+                            /* useNamedValues = */ true,
+                            typeAnnotation,
+                            lastCodeRuntimeInvisibleTypeAnnotation);
+        }
+    }
+
+    @Override
+    public void visitLineNumber(final int line, final Label start) {
+        if (lineNumberTable == null) {
+            lineNumberTable = new ByteVector();
+        }
+        ++lineNumberTableLength;
+        lineNumberTable.putShort(start.bytecodeOffset);
+        lineNumberTable.putShort(line);
+    }
+
+    @Override
+    public void visitMaxs(final int maxStack, final int maxLocals) {
+        if (compute == COMPUTE_ALL_FRAMES) {
+            computeAllFrames();
+        } else if (compute == COMPUTE_MAX_STACK_AND_LOCAL) {
+            computeMaxStackAndLocal();
+        } else if (compute == COMPUTE_MAX_STACK_AND_LOCAL_FROM_FRAMES) {
+            this.maxStack = maxRelativeStackSize;
+        } else {
+            this.maxStack = maxStack;
+            this.maxLocals = maxLocals;
+        }
+    }
+
+    /** Computes all the stack map frames of the method, from scratch. */
+    private void computeAllFrames() {
+        // Complete the control flow graph with exception handler blocks.
+        Handler handler = firstHandler;
+        while (handler != null) {
+            String catchTypeDescriptor =
+                    handler.catchTypeDescriptor == null ? "java/lang/Throwable" : handler.catchTypeDescriptor;
+            int catchType = Frame.getAbstractTypeFromInternalName(symbolTable, catchTypeDescriptor);
+            // Mark handlerBlock as an exception handler.
+            Label handlerBlock = handler.handlerPc.getCanonicalInstance();
+            handlerBlock.flags |= Label.FLAG_JUMP_TARGET;
+            // Add handlerBlock as a successor of all the basic blocks in the exception handler range.
+            Label handlerRangeBlock = handler.startPc.getCanonicalInstance();
+            Label handlerRangeEnd = handler.endPc.getCanonicalInstance();
+            while (handlerRangeBlock != handlerRangeEnd) {
+                handlerRangeBlock.outgoingEdges =
+                        new Edge(catchType, handlerBlock, handlerRangeBlock.outgoingEdges);
+                handlerRangeBlock = handlerRangeBlock.nextBasicBlock;
+            }
+            handler = handler.nextHandler;
+        }
+
+        // Create and visit the first (implicit) frame.
+        Frame firstFrame = firstBasicBlock.frame;
+        firstFrame.setInputFrameFromDescriptor(symbolTable, accessFlags, descriptor, this.maxLocals);
+        firstFrame.accept(this);
+
+        // Fix point algorithm: add the first basic block to a list of blocks to process (i.e. blocks
+        // whose stack map frame has changed) and, while there are blocks to process, remove one from
+        // the list and update the stack map frames of its successor blocks in the control flow graph
+        // (which might change them, in which case these blocks must be processed too, and are thus
+        // added to the list of blocks to process). Also compute the maximum stack size of the method,
+        // as a by-product.
+        Label listOfBlocksToProcess = firstBasicBlock;
+        listOfBlocksToProcess.nextListElement = Label.EMPTY_LIST;
+        int maxStackSize = 0;
+        while (listOfBlocksToProcess != Label.EMPTY_LIST) {
+            // Remove a basic block from the list of blocks to process.
+            Label basicBlock = listOfBlocksToProcess;
+            listOfBlocksToProcess = listOfBlocksToProcess.nextListElement;
+            basicBlock.nextListElement = null;
+            // By definition, basicBlock is reachable.
+            basicBlock.flags |= Label.FLAG_REACHABLE;
+            // Update the (absolute) maximum stack size.
+            int maxBlockStackSize = basicBlock.frame.getInputStackSize() + basicBlock.outputStackMax;
+            if (maxBlockStackSize > maxStackSize) {
+                maxStackSize = maxBlockStackSize;
+            }
+            // Update the successor blocks of basicBlock in the control flow graph.
+            Edge outgoingEdge = basicBlock.outgoingEdges;
+            while (outgoingEdge != null) {
+                Label successorBlock = outgoingEdge.successor.getCanonicalInstance();
+                boolean successorBlockChanged =
+                        basicBlock.frame.merge(symbolTable, successorBlock.frame, outgoingEdge.info);
+                if (successorBlockChanged && successorBlock.nextListElement == null) {
+                    // If successorBlock has changed it must be processed. Thus, if it is not already in the
+                    // list of blocks to process, add it to this list.
+                    successorBlock.nextListElement = listOfBlocksToProcess;
+                    listOfBlocksToProcess = successorBlock;
+                }
+                outgoingEdge = outgoingEdge.nextEdge;
+            }
+        }
+
+        // Loop over all the basic blocks and visit the stack map frames that must be stored in the
+        // StackMapTable attribute. Also replace unreachable code with NOP* ATHROW, and remove it from
+        // exception handler ranges.
+        Label basicBlock = firstBasicBlock;
+        while (basicBlock != null) {
+            if ((basicBlock.flags & (Label.FLAG_JUMP_TARGET | Label.FLAG_REACHABLE))
+                    == (Label.FLAG_JUMP_TARGET | Label.FLAG_REACHABLE)) {
+                basicBlock.frame.accept(this);
+            }
+            if ((basicBlock.flags & Label.FLAG_REACHABLE) == 0) {
+                // Find the start and end bytecode offsets of this unreachable block.
+                Label nextBasicBlock = basicBlock.nextBasicBlock;
+                int startOffset = basicBlock.bytecodeOffset;
+                int endOffset = (nextBasicBlock == null ? code.length : nextBasicBlock.bytecodeOffset) - 1;
+                if (endOffset >= startOffset) {
+                    // Replace its instructions with NOP ... NOP ATHROW.
+                    for (int i = startOffset; i < endOffset; ++i) {
+                        code.data[i] = Opcodes.NOP;
+                    }
+                    code.data[endOffset] = (byte) Opcodes.ATHROW;
+                    // Emit a frame for this unreachable block, with no local and a Throwable on the stack
+                    // (so that the ATHROW could consume this Throwable if it were reachable).
+                    int frameIndex = visitFrameStart(startOffset, /* numLocal = */ 0, /* numStack = */ 1);
+                    currentFrame[frameIndex] =
+                            Frame.getAbstractTypeFromInternalName(symbolTable, "java/lang/Throwable");
+                    visitFrameEnd();
+                    // Remove this unreachable basic block from the exception handler ranges.
+                    firstHandler = Handler.removeRange(firstHandler, basicBlock, nextBasicBlock);
+                    // The maximum stack size is now at least one, because of the Throwable declared above.
+                    maxStackSize = Math.max(maxStackSize, 1);
+                }
+            }
+            basicBlock = basicBlock.nextBasicBlock;
+        }
+
+        this.maxStack = maxStackSize;
+    }
+
+    /** Computes the maximum stack size of the method. */
+    private void computeMaxStackAndLocal() {
+        // Complete the control flow graph with exception handler blocks.
+        Handler handler = firstHandler;
+        while (handler != null) {
+            Label handlerBlock = handler.handlerPc;
+            Label handlerRangeBlock = handler.startPc;
+            Label handlerRangeEnd = handler.endPc;
+            // Add handlerBlock as a successor of all the basic blocks in the exception handler range.
+            while (handlerRangeBlock != handlerRangeEnd) {
+                if ((handlerRangeBlock.flags & Label.FLAG_SUBROUTINE_CALLER) == 0) {
+                    handlerRangeBlock.outgoingEdges =
+                            new Edge(Edge.EXCEPTION, handlerBlock, handlerRangeBlock.outgoingEdges);
+                } else {
+                    // If handlerRangeBlock is a JSR block, add handlerBlock after the first two outgoing
+                    // edges to preserve the hypothesis about JSR block successors order (see
+                    // {@link #visitJumpInsn}).
+                    handlerRangeBlock.outgoingEdges.nextEdge.nextEdge =
+                            new Edge(
+                                    Edge.EXCEPTION, handlerBlock, handlerRangeBlock.outgoingEdges.nextEdge.nextEdge);
+                }
+                handlerRangeBlock = handlerRangeBlock.nextBasicBlock;
+            }
+            handler = handler.nextHandler;
+        }
+
+        // Complete the control flow graph with the successor blocks of subroutines, if needed.
+        if (hasSubroutines) {
+            // First step: find the subroutines. This step determines, for each basic block, to which
+            // subroutine(s) it belongs. Start with the main "subroutine":
+            short numSubroutines = 1;
+            firstBasicBlock.markSubroutine(numSubroutines);
+            // Then, mark the subroutines called by the main subroutine, then the subroutines called by
+            // those called by the main subroutine, etc.
+            for (short currentSubroutine = 1; currentSubroutine <= numSubroutines; ++currentSubroutine) {
+                Label basicBlock = firstBasicBlock;
+                while (basicBlock != null) {
+                    if ((basicBlock.flags & Label.FLAG_SUBROUTINE_CALLER) != 0
+                            && basicBlock.subroutineId == currentSubroutine) {
+                        Label jsrTarget = basicBlock.outgoingEdges.nextEdge.successor;
+                        if (jsrTarget.subroutineId == 0) {
+                            // If this subroutine has not been marked yet, find its basic blocks.
+                            jsrTarget.markSubroutine(++numSubroutines);
+                        }
+                    }
+                    basicBlock = basicBlock.nextBasicBlock;
+                }
+            }
+            // Second step: find the successors in the control flow graph of each subroutine basic block
+            // 'r' ending with a RET instruction. These successors are the virtual successors of the basic
+            // blocks ending with JSR instructions (see {@link #visitJumpInsn)} that can reach 'r'.
+            Label basicBlock = firstBasicBlock;
+            while (basicBlock != null) {
+                if ((basicBlock.flags & Label.FLAG_SUBROUTINE_CALLER) != 0) {
+                    // By construction, jsr targets are stored in the second outgoing edge of basic blocks
+                    // that ends with a jsr instruction (see {@link #FLAG_SUBROUTINE_CALLER}).
+                    Label subroutine = basicBlock.outgoingEdges.nextEdge.successor;
+                    subroutine.addSubroutineRetSuccessors(basicBlock);
+                }
+                basicBlock = basicBlock.nextBasicBlock;
+            }
+        }
+
+        // Data flow algorithm: put the first basic block in a list of blocks to process (i.e. blocks
+        // whose input stack size has changed) and, while there are blocks to process, remove one
+        // from the list, update the input stack size of its successor blocks in the control flow
+        // graph, and add these blocks to the list of blocks to process (if not already done).
+        Label listOfBlocksToProcess = firstBasicBlock;
+        listOfBlocksToProcess.nextListElement = Label.EMPTY_LIST;
+        int maxStackSize = maxStack;
+        while (listOfBlocksToProcess != Label.EMPTY_LIST) {
+            // Remove a basic block from the list of blocks to process. Note that we don't reset
+            // basicBlock.nextListElement to null on purpose, to make sure we don't reprocess already
+            // processed basic blocks.
+            Label basicBlock = listOfBlocksToProcess;
+            listOfBlocksToProcess = listOfBlocksToProcess.nextListElement;
+            // Compute the (absolute) input stack size and maximum stack size of this block.
+            int inputStackTop = basicBlock.inputStackSize;
+            int maxBlockStackSize = inputStackTop + basicBlock.outputStackMax;
+            // Update the absolute maximum stack size of the method.
+            if (maxBlockStackSize > maxStackSize) {
+                maxStackSize = maxBlockStackSize;
+            }
+            // Update the input stack size of the successor blocks of basicBlock in the control flow
+            // graph, and add these blocks to the list of blocks to process, if not already done.
+            Edge outgoingEdge = basicBlock.outgoingEdges;
+            if ((basicBlock.flags & Label.FLAG_SUBROUTINE_CALLER) != 0) {
+                // Ignore the first outgoing edge of the basic blocks ending with a jsr: these are virtual
+                // edges which lead to the instruction just after the jsr, and do not correspond to a
+                // possible execution path (see {@link #visitJumpInsn} and
+                // {@link Label#FLAG_SUBROUTINE_CALLER}).
+                outgoingEdge = outgoingEdge.nextEdge;
+            }
+            while (outgoingEdge != null) {
+                Label successorBlock = outgoingEdge.successor;
+                if (successorBlock.nextListElement == null) {
+                    successorBlock.inputStackSize =
+                            (short) (outgoingEdge.info == Edge.EXCEPTION ? 1 : inputStackTop + outgoingEdge.info);
+                    successorBlock.nextListElement = listOfBlocksToProcess;
+                    listOfBlocksToProcess = successorBlock;
+                }
+                outgoingEdge = outgoingEdge.nextEdge;
+            }
+        }
+        this.maxStack = maxStackSize;
+    }
+
+    @Override
+    public void visitEnd() {
+        // Nothing to do.
+    }
+
+    // -----------------------------------------------------------------------------------------------
+    // Utility methods: control flow analysis algorithm
+    // -----------------------------------------------------------------------------------------------
+
+    /**
+      * Adds a successor to {@link #currentBasicBlock} in the control flow graph.
+      *
+      * @param info information about the control flow edge to be added.
+      * @param successor the successor block to be added to the current basic block.
+      */
+    private void addSuccessorToCurrentBasicBlock(final int info, final Label successor) {
+        currentBasicBlock.outgoingEdges = new Edge(info, successor, currentBasicBlock.outgoingEdges);
+    }
+
+    /**
+      * Ends the current basic block. This method must be used in the case where the current basic
+      * block does not have any successor.
+      *
+      * <p>WARNING: this method must be called after the currently visited instruction has been put in
+      * {@link #code} (if frames are computed, this method inserts a new Label to start a new basic
+      * block after the current instruction).
+      */
+    private void endCurrentBasicBlockWithNoSuccessor() {
+        if (compute == COMPUTE_ALL_FRAMES) {
+            Label nextBasicBlock = new Label();
+            nextBasicBlock.frame = new Frame(nextBasicBlock);
+            nextBasicBlock.resolve(code.data, stackMapTableEntries, code.length);
+            lastBasicBlock.nextBasicBlock = nextBasicBlock;
+            lastBasicBlock = nextBasicBlock;
+            currentBasicBlock = null;
+        } else if (compute == COMPUTE_MAX_STACK_AND_LOCAL) {
+            currentBasicBlock.outputStackMax = (short) maxRelativeStackSize;
+            currentBasicBlock = null;
+        }
+    }
+
+    // -----------------------------------------------------------------------------------------------
+    // Utility methods: stack map frames
+    // -----------------------------------------------------------------------------------------------
+
+    /**
+      * Starts the visit of a new stack map frame, stored in {@link #currentFrame}.
+      *
+      * @param offset the bytecode offset of the instruction to which the frame corresponds.
+      * @param numLocal the number of local variables in the frame.
+      * @param numStack the number of stack elements in the frame.
+      * @return the index of the next element to be written in this frame.
+      */
+    int visitFrameStart(final int offset, final int numLocal, final int numStack) {
+        int frameLength = 3 + numLocal + numStack;
+        if (currentFrame == null || currentFrame.length < frameLength) {
+            currentFrame = new int[frameLength];
+        }
+        currentFrame[0] = offset;
+        currentFrame[1] = numLocal;
+        currentFrame[2] = numStack;
+        return 3;
+    }
+
+    /**
+      * Sets an abstract type in {@link #currentFrame}.
+      *
+      * @param frameIndex the index of the element to be set in {@link #currentFrame}.
+      * @param abstractType an abstract type.
+      */
+    void visitAbstractType(final int frameIndex, final int abstractType) {
+        currentFrame[frameIndex] = abstractType;
+    }
+
+    /**
+      * Ends the visit of {@link #currentFrame} by writing it in the StackMapTable entries and by
+      * updating the StackMapTable number_of_entries (except if the current frame is the first one,
+      * which is implicit in StackMapTable). Then resets {@link #currentFrame} to {@literal null}.
+      */
+    void visitFrameEnd() {
+        if (previousFrame != null) {
+            if (stackMapTableEntries == null) {
+                stackMapTableEntries = new ByteVector();
+            }
+            putFrame();
+            ++stackMapTableNumberOfEntries;
+        }
+        previousFrame = currentFrame;
+        currentFrame = null;
+    }
+
+    /** Compresses and writes {@link #currentFrame} in a new StackMapTable entry. */
+    private void putFrame() {
+        final int numLocal = currentFrame[1];
+        final int numStack = currentFrame[2];
+        if (symbolTable.getMajorVersion() < Opcodes.V1_6) {
+            // Generate a StackMap attribute entry, which are always uncompressed.
+            stackMapTableEntries.putShort(currentFrame[0]).putShort(numLocal);
+            putAbstractTypes(3, 3 + numLocal);
+            stackMapTableEntries.putShort(numStack);
+            putAbstractTypes(3 + numLocal, 3 + numLocal + numStack);
+            return;
+        }
+        final int offsetDelta =
+                stackMapTableNumberOfEntries == 0
+                        ? currentFrame[0]
+                        : currentFrame[0] - previousFrame[0] - 1;
+        final int previousNumlocal = previousFrame[1];
+        final int numLocalDelta = numLocal - previousNumlocal;
+        int type = Frame.FULL_FRAME;
+        if (numStack == 0) {
+            switch (numLocalDelta) {
+                case -3:
+                case -2:
+                case -1:
+                    type = Frame.CHOP_FRAME;
+                    break;
+                case 0:
+                    type = offsetDelta < 64 ? Frame.SAME_FRAME : Frame.SAME_FRAME_EXTENDED;
+                    break;
+                case 1:
+                case 2:
+                case 3:
+                    type = Frame.APPEND_FRAME;
+                    break;
+                default:
+                    // Keep the FULL_FRAME type.
+                    break;
+            }
+        } else if (numLocalDelta == 0 && numStack == 1) {
+            type =
+                    offsetDelta < 63
+                            ? Frame.SAME_LOCALS_1_STACK_ITEM_FRAME
+                            : Frame.SAME_LOCALS_1_STACK_ITEM_FRAME_EXTENDED;
+        }
+        if (type != Frame.FULL_FRAME) {
+            // Verify if locals are the same as in the previous frame.
+            int frameIndex = 3;
+            for (int i = 0; i < previousNumlocal && i < numLocal; i++) {
+                if (currentFrame[frameIndex] != previousFrame[frameIndex]) {
+                    type = Frame.FULL_FRAME;
+                    break;
+                }
+                frameIndex++;
+            }
+        }
+        switch (type) {
+            case Frame.SAME_FRAME:
+                stackMapTableEntries.putByte(offsetDelta);
+                break;
+            case Frame.SAME_LOCALS_1_STACK_ITEM_FRAME:
+                stackMapTableEntries.putByte(Frame.SAME_LOCALS_1_STACK_ITEM_FRAME + offsetDelta);
+                putAbstractTypes(3 + numLocal, 4 + numLocal);
+                break;
+            case Frame.SAME_LOCALS_1_STACK_ITEM_FRAME_EXTENDED:
+                stackMapTableEntries
+                        .putByte(Frame.SAME_LOCALS_1_STACK_ITEM_FRAME_EXTENDED)
+                        .putShort(offsetDelta);
+                putAbstractTypes(3 + numLocal, 4 + numLocal);
+                break;
+            case Frame.SAME_FRAME_EXTENDED:
+                stackMapTableEntries.putByte(Frame.SAME_FRAME_EXTENDED).putShort(offsetDelta);
+                break;
+            case Frame.CHOP_FRAME:
+                stackMapTableEntries
+                        .putByte(Frame.SAME_FRAME_EXTENDED + numLocalDelta)
+                        .putShort(offsetDelta);
+                break;
+            case Frame.APPEND_FRAME:
+                stackMapTableEntries
+                        .putByte(Frame.SAME_FRAME_EXTENDED + numLocalDelta)
+                        .putShort(offsetDelta);
+                putAbstractTypes(3 + previousNumlocal, 3 + numLocal);
+                break;
+            case Frame.FULL_FRAME:
+            default:
+                stackMapTableEntries.putByte(Frame.FULL_FRAME).putShort(offsetDelta).putShort(numLocal);
+                putAbstractTypes(3, 3 + numLocal);
+                stackMapTableEntries.putShort(numStack);
+                putAbstractTypes(3 + numLocal, 3 + numLocal + numStack);
+                break;
+        }
+    }
+
+    /**
+      * Puts some abstract types of {@link #currentFrame} in {@link #stackMapTableEntries} , using the
+      * JVMS verification_type_info format used in StackMapTable attributes.
+      *
+      * @param start index of the first type in {@link #currentFrame} to write.
+      * @param end index of last type in {@link #currentFrame} to write (exclusive).
+      */
+    private void putAbstractTypes(final int start, final int end) {
+        for (int i = start; i < end; ++i) {
+            Frame.putAbstractType(symbolTable, currentFrame[i], stackMapTableEntries);
+        }
+    }
+
+    /**
+      * Puts the given public API frame element type in {@link #stackMapTableEntries} , using the JVMS
+      * verification_type_info format used in StackMapTable attributes.
+      *
+      * @param type a frame element type described using the same format as in {@link
+      *     MethodVisitor#visitFrame}, i.e. either {@link Opcodes#TOP}, {@link Opcodes#INTEGER}, {@link
+      *     Opcodes#FLOAT}, {@link Opcodes#LONG}, {@link Opcodes#DOUBLE}, {@link Opcodes#NULL}, or
+      *     {@link Opcodes#UNINITIALIZED_THIS}, or the internal name of a class, or a Label designating
+      *     a NEW instruction (for uninitialized types).
+      */
+    private void putFrameType(final Object type) {
+        if (type instanceof Integer) {
+            stackMapTableEntries.putByte(((Integer) type).intValue());
+        } else if (type instanceof String) {
+            stackMapTableEntries
+                    .putByte(Frame.ITEM_OBJECT)
+                    .putShort(symbolTable.addConstantClass((String) type).index);
+        } else {
+            stackMapTableEntries.putByte(Frame.ITEM_UNINITIALIZED);
+            ((Label) type).put(stackMapTableEntries);
+        }
+    }
+
+    // -----------------------------------------------------------------------------------------------
+    // Utility methods
+    // -----------------------------------------------------------------------------------------------
+
+    /**
+      * Returns whether the attributes of this method can be copied from the attributes of the given
+      * method (assuming there is no method visitor between the given ClassReader and this
+      * MethodWriter). This method should only be called just after this MethodWriter has been created,
+      * and before any content is visited. It returns true if the attributes corresponding to the
+      * constructor arguments (at most a Signature, an Exception, a Deprecated and a Synthetic
+      * attribute) are the same as the corresponding attributes in the given method.
+      *
+      * @param source the source ClassReader from which the attributes of this method might be copied.
+      * @param hasSyntheticAttribute whether the method_info JVMS structure from which the attributes
+      *     of this method might be copied contains a Synthetic attribute.
+      * @param hasDeprecatedAttribute whether the method_info JVMS structure from which the attributes
+      *     of this method might be copied contains a Deprecated attribute.
+      * @param descriptorIndex the descriptor_index field of the method_info JVMS structure from which
+      *     the attributes of this method might be copied.
+      * @param signatureIndex the constant pool index contained in the Signature attribute of the
+      *     method_info JVMS structure from which the attributes of this method might be copied, or 0.
+      * @param exceptionsOffset the offset in 'source.b' of the Exceptions attribute of the method_info
+      *     JVMS structure from which the attributes of this method might be copied, or 0.
+      * @return whether the attributes of this method can be copied from the attributes of the
+      *     method_info JVMS structure in 'source.b', between 'methodInfoOffset' and 'methodInfoOffset'
+      *     + 'methodInfoLength'.
+      */
+    boolean canCopyMethodAttributes(
+            final ClassReader source,
+            final boolean hasSyntheticAttribute,
+            final boolean hasDeprecatedAttribute,
+            final int descriptorIndex,
+            final int signatureIndex,
+            final int exceptionsOffset) {
+        // If the method descriptor has changed, with more locals than the max_locals field of the
+        // original Code attribute, if any, then the original method attributes can't be copied. A
+        // conservative check on the descriptor changes alone ensures this (being more precise is not
+        // worth the additional complexity, because these cases should be rare -- if a transform changes
+        // a method descriptor, most of the time it needs to change the method's code too).
+        if (source != symbolTable.getSource()
+                || descriptorIndex != this.descriptorIndex
+                || signatureIndex != this.signatureIndex
+                || hasDeprecatedAttribute != ((accessFlags & Opcodes.ACC_DEPRECATED) != 0)) {
+            return false;
+        }
+        boolean needSyntheticAttribute =
+                symbolTable.getMajorVersion() < Opcodes.V1_5 && (accessFlags & Opcodes.ACC_SYNTHETIC) != 0;
+        if (hasSyntheticAttribute != needSyntheticAttribute) {
+            return false;
+        }
+        if (exceptionsOffset == 0) {
+            if (numberOfExceptions != 0) {
+                return false;
+            }
+        } else if (source.readUnsignedShort(exceptionsOffset) == numberOfExceptions) {
+            int currentExceptionOffset = exceptionsOffset + 2;
+            for (int i = 0; i < numberOfExceptions; ++i) {
+                if (source.readUnsignedShort(currentExceptionOffset) != exceptionIndexTable[i]) {
+                    return false;
+                }
+                currentExceptionOffset += 2;
+            }
+        }
+        return true;
+    }
+
+    /**
+      * Sets the source from which the attributes of this method will be copied.
+      *
+      * @param methodInfoOffset the offset in 'symbolTable.getSource()' of the method_info JVMS
+      *     structure from which the attributes of this method will be copied.
+      * @param methodInfoLength the length in 'symbolTable.getSource()' of the method_info JVMS
+      *     structure from which the attributes of this method will be copied.
+      */
+    void setMethodAttributesSource(final int methodInfoOffset, final int methodInfoLength) {
+        // Don't copy the attributes yet, instead store their location in the source class reader so
+        // they can be copied later, in {@link #putMethodInfo}. Note that we skip the 6 header bytes
+        // of the method_info JVMS structure.
+        this.sourceOffset = methodInfoOffset + 6;
+        this.sourceLength = methodInfoLength - 6;
+    }
+
+    /**
+      * Returns the size of the method_info JVMS structure generated by this MethodWriter. Also add the
+      * names of the attributes of this method in the constant pool.
+      *
+      * @return the size in bytes of the method_info JVMS structure.
+      */
+    int computeMethodInfoSize() {
+        // If this method_info must be copied from an existing one, the size computation is trivial.
+        if (sourceOffset != 0) {
+            // sourceLength excludes the first 6 bytes for access_flags, name_index and descriptor_index.
+            return 6 + sourceLength;
+        }
+        // 2 bytes each for access_flags, name_index, descriptor_index and attributes_count.
+        int size = 8;
+        // For ease of reference, we use here the same attribute order as in Section 4.7 of the JVMS.
+        if (code.length > 0) {
+            if (code.length > 65535) {
+                throw new MethodTooLargeException(
+                        symbolTable.getClassName(), name, descriptor, code.length);
+            }
+            symbolTable.addConstantUtf8(Constants.CODE);
+            // The Code attribute has 6 header bytes, plus 2, 2, 4 and 2 bytes respectively for max_stack,
+            // max_locals, code_length and attributes_count, plus the bytecode and the exception table.
+            size += 16 + code.length + Handler.getExceptionTableSize(firstHandler);
+            if (stackMapTableEntries != null) {
+                boolean useStackMapTable = symbolTable.getMajorVersion() >= Opcodes.V1_6;
+                symbolTable.addConstantUtf8(useStackMapTable ? Constants.STACK_MAP_TABLE : "StackMap");
+                // 6 header bytes and 2 bytes for number_of_entries.
+                size += 8 + stackMapTableEntries.length;
+            }
+            if (lineNumberTable != null) {
+                symbolTable.addConstantUtf8(Constants.LINE_NUMBER_TABLE);
+                // 6 header bytes and 2 bytes for line_number_table_length.
+                size += 8 + lineNumberTable.length;
+            }
+            if (localVariableTable != null) {
+                symbolTable.addConstantUtf8(Constants.LOCAL_VARIABLE_TABLE);
+                // 6 header bytes and 2 bytes for local_variable_table_length.
+                size += 8 + localVariableTable.length;
+            }
+            if (localVariableTypeTable != null) {
+                symbolTable.addConstantUtf8(Constants.LOCAL_VARIABLE_TYPE_TABLE);
+                // 6 header bytes and 2 bytes for local_variable_type_table_length.
+                size += 8 + localVariableTypeTable.length;
+            }
+            if (lastCodeRuntimeVisibleTypeAnnotation != null) {
+                size +=
+                        lastCodeRuntimeVisibleTypeAnnotation.computeAnnotationsSize(
+                                Constants.RUNTIME_VISIBLE_TYPE_ANNOTATIONS);
+            }
+            if (lastCodeRuntimeInvisibleTypeAnnotation != null) {
+                size +=
+                        lastCodeRuntimeInvisibleTypeAnnotation.computeAnnotationsSize(
+                                Constants.RUNTIME_INVISIBLE_TYPE_ANNOTATIONS);
+            }
+            if (firstCodeAttribute != null) {
+                size +=
+                        firstCodeAttribute.computeAttributesSize(
+                                symbolTable, code.data, code.length, maxStack, maxLocals);
+            }
+        }
+        if (numberOfExceptions > 0) {
+            symbolTable.addConstantUtf8(Constants.EXCEPTIONS);
+            size += 8 + 2 * numberOfExceptions;
+        }
+        size += Attribute.computeAttributesSize(symbolTable, accessFlags, signatureIndex);
+        size +=
+                AnnotationWriter.computeAnnotationsSize(
+                        lastRuntimeVisibleAnnotation,
+                        lastRuntimeInvisibleAnnotation,
+                        lastRuntimeVisibleTypeAnnotation,
+                        lastRuntimeInvisibleTypeAnnotation);
+        if (lastRuntimeVisibleParameterAnnotations != null) {
+            size +=
+                    AnnotationWriter.computeParameterAnnotationsSize(
+                            Constants.RUNTIME_VISIBLE_PARAMETER_ANNOTATIONS,
+                            lastRuntimeVisibleParameterAnnotations,
+                            visibleAnnotableParameterCount == 0
+                                    ? lastRuntimeVisibleParameterAnnotations.length
+                                    : visibleAnnotableParameterCount);
+        }
+        if (lastRuntimeInvisibleParameterAnnotations != null) {
+            size +=
+                    AnnotationWriter.computeParameterAnnotationsSize(
+                            Constants.RUNTIME_INVISIBLE_PARAMETER_ANNOTATIONS,
+                            lastRuntimeInvisibleParameterAnnotations,
+                            invisibleAnnotableParameterCount == 0
+                                    ? lastRuntimeInvisibleParameterAnnotations.length
+                                    : invisibleAnnotableParameterCount);
+        }
+        if (defaultValue != null) {
+            symbolTable.addConstantUtf8(Constants.ANNOTATION_DEFAULT);
+            size += 6 + defaultValue.length;
+        }
+        if (parameters != null) {
+            symbolTable.addConstantUtf8(Constants.METHOD_PARAMETERS);
+            // 6 header bytes and 1 byte for parameters_count.
+            size += 7 + parameters.length;
+        }
+        if (firstAttribute != null) {
+            size += firstAttribute.computeAttributesSize(symbolTable);
+        }
+        return size;
+    }
+
+    /**
+      * Puts the content of the method_info JVMS structure generated by this MethodWriter into the
+      * given ByteVector.
+      *
+      * @param output where the method_info structure must be put.
+      */
+    void putMethodInfo(final ByteVector output) {
+        boolean useSyntheticAttribute = symbolTable.getMajorVersion() < Opcodes.V1_5;
+        int mask = useSyntheticAttribute ? Opcodes.ACC_SYNTHETIC : 0;
+        output.putShort(accessFlags & ~mask).putShort(nameIndex).putShort(descriptorIndex);
+        // If this method_info must be copied from an existing one, copy it now and return early.
+        if (sourceOffset != 0) {
+            output.putByteArray(symbolTable.getSource().classFileBuffer, sourceOffset, sourceLength);
+            return;
+        }
+        // For ease of reference, we use here the same attribute order as in Section 4.7 of the JVMS.
+        int attributeCount = 0;
+        if (code.length > 0) {
+            ++attributeCount;
+        }
+        if (numberOfExceptions > 0) {
+            ++attributeCount;
+        }
+        if ((accessFlags & Opcodes.ACC_SYNTHETIC) != 0 && useSyntheticAttribute) {
+            ++attributeCount;
+        }
+        if (signatureIndex != 0) {
+            ++attributeCount;
+        }
+        if ((accessFlags & Opcodes.ACC_DEPRECATED) != 0) {
+            ++attributeCount;
+        }
+        if (lastRuntimeVisibleAnnotation != null) {
+            ++attributeCount;
+        }
+        if (lastRuntimeInvisibleAnnotation != null) {
+            ++attributeCount;
+        }
+        if (lastRuntimeVisibleParameterAnnotations != null) {
+            ++attributeCount;
+        }
+        if (lastRuntimeInvisibleParameterAnnotations != null) {
+            ++attributeCount;
+        }
+        if (lastRuntimeVisibleTypeAnnotation != null) {
+            ++attributeCount;
+        }
+        if (lastRuntimeInvisibleTypeAnnotation != null) {
+            ++attributeCount;
+        }
+        if (defaultValue != null) {
+            ++attributeCount;
+        }
+        if (parameters != null) {
+            ++attributeCount;
+        }
+        if (firstAttribute != null) {
+            attributeCount += firstAttribute.getAttributeCount();
+        }
+        // For ease of reference, we use here the same attribute order as in Section 4.7 of the JVMS.
+        output.putShort(attributeCount);
+        if (code.length > 0) {
+            // 2, 2, 4 and 2 bytes respectively for max_stack, max_locals, code_length and
+            // attributes_count, plus the bytecode and the exception table.
+            int size = 10 + code.length + Handler.getExceptionTableSize(firstHandler);
+            int codeAttributeCount = 0;
+            if (stackMapTableEntries != null) {
+                // 6 header bytes and 2 bytes for number_of_entries.
+                size += 8 + stackMapTableEntries.length;
+                ++codeAttributeCount;
+            }
+            if (lineNumberTable != null) {
+                // 6 header bytes and 2 bytes for line_number_table_length.
+                size += 8 + lineNumberTable.length;
+                ++codeAttributeCount;
+            }
+            if (localVariableTable != null) {
+                // 6 header bytes and 2 bytes for local_variable_table_length.
+                size += 8 + localVariableTable.length;
+                ++codeAttributeCount;
+            }
+            if (localVariableTypeTable != null) {
+                // 6 header bytes and 2 bytes for local_variable_type_table_length.
+                size += 8 + localVariableTypeTable.length;
+                ++codeAttributeCount;
+            }
+            if (lastCodeRuntimeVisibleTypeAnnotation != null) {
+                size +=
+                        lastCodeRuntimeVisibleTypeAnnotation.computeAnnotationsSize(
+                                Constants.RUNTIME_VISIBLE_TYPE_ANNOTATIONS);
+                ++codeAttributeCount;
+            }
+            if (lastCodeRuntimeInvisibleTypeAnnotation != null) {
+                size +=
+                        lastCodeRuntimeInvisibleTypeAnnotation.computeAnnotationsSize(
+                                Constants.RUNTIME_INVISIBLE_TYPE_ANNOTATIONS);
+                ++codeAttributeCount;
+            }
+            if (firstCodeAttribute != null) {
+                size +=
+                        firstCodeAttribute.computeAttributesSize(
+                                symbolTable, code.data, code.length, maxStack, maxLocals);
+                codeAttributeCount += firstCodeAttribute.getAttributeCount();
+            }
+            output
+                    .putShort(symbolTable.addConstantUtf8(Constants.CODE))
+                    .putInt(size)
+                    .putShort(maxStack)
+                    .putShort(maxLocals)
+                    .putInt(code.length)
+                    .putByteArray(code.data, 0, code.length);
+            Handler.putExceptionTable(firstHandler, output);
+            output.putShort(codeAttributeCount);
+            if (stackMapTableEntries != null) {
+                boolean useStackMapTable = symbolTable.getMajorVersion() >= Opcodes.V1_6;
+                output
+                        .putShort(
+                                symbolTable.addConstantUtf8(
+                                        useStackMapTable ? Constants.STACK_MAP_TABLE : "StackMap"))
+                        .putInt(2 + stackMapTableEntries.length)
+                        .putShort(stackMapTableNumberOfEntries)
+                        .putByteArray(stackMapTableEntries.data, 0, stackMapTableEntries.length);
+            }
+            if (lineNumberTable != null) {
+                output
+                        .putShort(symbolTable.addConstantUtf8(Constants.LINE_NUMBER_TABLE))
+                        .putInt(2 + lineNumberTable.length)
+                        .putShort(lineNumberTableLength)
+                        .putByteArray(lineNumberTable.data, 0, lineNumberTable.length);
+            }
+            if (localVariableTable != null) {
+                output
+                        .putShort(symbolTable.addConstantUtf8(Constants.LOCAL_VARIABLE_TABLE))
+                        .putInt(2 + localVariableTable.length)
+                        .putShort(localVariableTableLength)
+                        .putByteArray(localVariableTable.data, 0, localVariableTable.length);
+            }
+            if (localVariableTypeTable != null) {
+                output
+                        .putShort(symbolTable.addConstantUtf8(Constants.LOCAL_VARIABLE_TYPE_TABLE))
+                        .putInt(2 + localVariableTypeTable.length)
+                        .putShort(localVariableTypeTableLength)
+                        .putByteArray(localVariableTypeTable.data, 0, localVariableTypeTable.length);
+            }
+            if (lastCodeRuntimeVisibleTypeAnnotation != null) {
+                lastCodeRuntimeVisibleTypeAnnotation.putAnnotations(
+                        symbolTable.addConstantUtf8(Constants.RUNTIME_VISIBLE_TYPE_ANNOTATIONS), output);
+            }
+            if (lastCodeRuntimeInvisibleTypeAnnotation != null) {
+                lastCodeRuntimeInvisibleTypeAnnotation.putAnnotations(
+                        symbolTable.addConstantUtf8(Constants.RUNTIME_INVISIBLE_TYPE_ANNOTATIONS), output);
+            }
+            if (firstCodeAttribute != null) {
+                firstCodeAttribute.putAttributes(
+                        symbolTable, code.data, code.length, maxStack, maxLocals, output);
+            }
+        }
+        if (numberOfExceptions > 0) {
+            output
+                    .putShort(symbolTable.addConstantUtf8(Constants.EXCEPTIONS))
+                    .putInt(2 + 2 * numberOfExceptions)
+                    .putShort(numberOfExceptions);
+            for (int exceptionIndex : exceptionIndexTable) {
+                output.putShort(exceptionIndex);
+            }
+        }
+        Attribute.putAttributes(symbolTable, accessFlags, signatureIndex, output);
+        AnnotationWriter.putAnnotations(
+                symbolTable,
+                lastRuntimeVisibleAnnotation,
+                lastRuntimeInvisibleAnnotation,
+                lastRuntimeVisibleTypeAnnotation,
+                lastRuntimeInvisibleTypeAnnotation,
+                output);
+        if (lastRuntimeVisibleParameterAnnotations != null) {
+            AnnotationWriter.putParameterAnnotations(
+                    symbolTable.addConstantUtf8(Constants.RUNTIME_VISIBLE_PARAMETER_ANNOTATIONS),
+                    lastRuntimeVisibleParameterAnnotations,
+                    visibleAnnotableParameterCount == 0
+                            ? lastRuntimeVisibleParameterAnnotations.length
+                            : visibleAnnotableParameterCount,
+                    output);
+        }
+        if (lastRuntimeInvisibleParameterAnnotations != null) {
+            AnnotationWriter.putParameterAnnotations(
+                    symbolTable.addConstantUtf8(Constants.RUNTIME_INVISIBLE_PARAMETER_ANNOTATIONS),
+                    lastRuntimeInvisibleParameterAnnotations,
+                    invisibleAnnotableParameterCount == 0
+                            ? lastRuntimeInvisibleParameterAnnotations.length
+                            : invisibleAnnotableParameterCount,
+                    output);
+        }
+        if (defaultValue != null) {
+            output
+                    .putShort(symbolTable.addConstantUtf8(Constants.ANNOTATION_DEFAULT))
+                    .putInt(defaultValue.length)
+                    .putByteArray(defaultValue.data, 0, defaultValue.length);
+        }
+        if (parameters != null) {
+            output
+                    .putShort(symbolTable.addConstantUtf8(Constants.METHOD_PARAMETERS))
+                    .putInt(1 + parameters.length)
+                    .putByte(parametersCount)
+                    .putByteArray(parameters.data, 0, parameters.length);
+        }
+        if (firstAttribute != null) {
+            firstAttribute.putAttributes(symbolTable, output);
+        }
+    }
+
+    /**
+      * Collects the attributes of this method into the given set of attribute prototypes.
+      *
+      * @param attributePrototypes a set of attribute prototypes.
+      */
+    final void collectAttributePrototypes(final Attribute.Set attributePrototypes) {
+        attributePrototypes.addAttributes(firstAttribute);
+        attributePrototypes.addAttributes(firstCodeAttribute);
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/org/objectweb/asm/ModuleVisitor.class b/tests/test_data/std/jdk/internal/org/objectweb/asm/ModuleVisitor.class
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zC*4|Nda|6PaeHi6I7_8OT(+=GO-#3P{Xwoj(Tl$vF1Mf}9+#IIy~KH&NIu;77gMX>
Aod5s;

literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/org/objectweb/asm/ModuleVisitor.java b/tests/test_data/std/jdk/internal/org/objectweb/asm/ModuleVisitor.java
new file mode 100644
index 00000000..0e8f4843
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/org/objectweb/asm/ModuleVisitor.java
@@ -0,0 +1,224 @@
+/*
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/*
+ * This file is available under and governed by the GNU General Public
+ * License version 2 only, as published by the Free Software Foundation.
+ * However, the following notice accompanied the original version of this
+ * file:
+ *
+ * ASM: a very small and fast Java bytecode manipulation framework
+ * Copyright (c) 2000-2011 INRIA, France Telecom
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the copyright holders nor the names of its
+ *    contributors may be used to endorse or promote products derived from
+ *    this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+package jdk.internal.org.objectweb.asm;
+
+/**
+ * A visitor to visit a Java module. The methods of this class must be called in the following
+ * order: ( {@code visitMainClass} | ( {@code visitPackage} | {@code visitRequire} | {@code
+ * visitExport} | {@code visitOpen} | {@code visitUse} | {@code visitProvide} )* ) {@code visitEnd}.
+ *
+ * @author Remi Forax
+ * @author Eric Bruneton
+ */
+public abstract class ModuleVisitor {
+    /**
+      * The ASM API version implemented by this visitor. The value of this field must be one of {@link
+      * Opcodes#ASM6} or {@link Opcodes#ASM7}.
+      */
+    protected final int api;
+
+    /**
+      * The module visitor to which this visitor must delegate method calls. May be {@literal null}.
+      */
+    protected ModuleVisitor mv;
+
+    /**
+      * Constructs a new {@link ModuleVisitor}.
+      *
+      * @param api the ASM API version implemented by this visitor. Must be one of {@link Opcodes#ASM6}
+      *     or {@link Opcodes#ASM7}.
+      */
+    protected ModuleVisitor(final int api) {
+        this(api, null);
+    }
+
+    /**
+      * Constructs a new {@link ModuleVisitor}.
+      *
+      * @param api the ASM API version implemented by this visitor. Must be one of {@link Opcodes#ASM6}
+      *     or {@link Opcodes#ASM7}.
+      * @param moduleVisitor the module visitor to which this visitor must delegate method calls. May
+      *     be null.
+      */
+    protected ModuleVisitor(final int api, final ModuleVisitor moduleVisitor) {
+        if (api != Opcodes.ASM9
+                && api != Opcodes.ASM8
+                && api != Opcodes.ASM7
+                && api != Opcodes.ASM6
+                && api != Opcodes.ASM5
+                && api != Opcodes.ASM4) {
+            throw new IllegalArgumentException("Unsupported api " + api);
+        }
+        this.api = api;
+        this.mv = moduleVisitor;
+    }
+
+    /**
+      * The module visitor to which this visitor must delegate method calls. May be {@literal null}.
+      *
+      * @return the module visitor to which this visitor must delegate method calls, or {@literal
+      *     null}.
+      */
+    public ModuleVisitor getDelegate() {
+        return mv;
+    }
+
+    /**
+      * Visit the main class of the current module.
+      *
+      * @param mainClass the internal name of the main class of the current module (see {@link
+      *     Type#getInternalName()}).
+      */
+    public void visitMainClass(final String mainClass) {
+        if (mv != null) {
+            mv.visitMainClass(mainClass);
+        }
+    }
+
+    /**
+      * Visit a package of the current module.
+      *
+      * @param packaze the internal name of a package (see {@link Type#getInternalName()}).
+      */
+    public void visitPackage(final String packaze) {
+        if (mv != null) {
+            mv.visitPackage(packaze);
+        }
+    }
+
+    /**
+      * Visits a dependence of the current module.
+      *
+      * @param module the fully qualified name (using dots) of the dependence.
+      * @param access the access flag of the dependence among {@code ACC_TRANSITIVE}, {@code
+      *     ACC_STATIC_PHASE}, {@code ACC_SYNTHETIC} and {@code ACC_MANDATED}.
+      * @param version the module version at compile time, or {@literal null}.
+      */
+    public void visitRequire(final String module, final int access, final String version) {
+        if (mv != null) {
+            mv.visitRequire(module, access, version);
+        }
+    }
+
+    /**
+      * Visit an exported package of the current module.
+      *
+      * @param packaze the internal name of the exported package (see {@link Type#getInternalName()}).
+      * @param access the access flag of the exported package, valid values are among {@code
+      *     ACC_SYNTHETIC} and {@code ACC_MANDATED}.
+      * @param modules the fully qualified names (using dots) of the modules that can access the public
+      *     classes of the exported package, or {@literal null}.
+      */
+    public void visitExport(final String packaze, final int access, final String... modules) {
+        if (mv != null) {
+            mv.visitExport(packaze, access, modules);
+        }
+    }
+
+    /**
+      * Visit an open package of the current module.
+      *
+      * @param packaze the internal name of the opened package (see {@link Type#getInternalName()}).
+      * @param access the access flag of the opened package, valid values are among {@code
+      *     ACC_SYNTHETIC} and {@code ACC_MANDATED}.
+      * @param modules the fully qualified names (using dots) of the modules that can use deep
+      *     reflection to the classes of the open package, or {@literal null}.
+      */
+    public void visitOpen(final String packaze, final int access, final String... modules) {
+        if (mv != null) {
+            mv.visitOpen(packaze, access, modules);
+        }
+    }
+
+    /**
+      * Visit a service used by the current module. The name must be the internal name of an interface
+      * or a class.
+      *
+      * @param service the internal name of the service (see {@link Type#getInternalName()}).
+      */
+    public void visitUse(final String service) {
+        if (mv != null) {
+            mv.visitUse(service);
+        }
+    }
+
+    /**
+      * Visit an implementation of a service.
+      *
+      * @param service the internal name of the service (see {@link Type#getInternalName()}).
+      * @param providers the internal names (see {@link Type#getInternalName()}) of the implementations
+      *     of the service (there is at least one provider).
+      */
+    public void visitProvide(final String service, final String... providers) {
+        if (mv != null) {
+            mv.visitProvide(service, providers);
+        }
+    }
+
+    /**
+      * Visits the end of the module. This method, which is the last one to be called, is used to
+      * inform the visitor that everything have been visited.
+      */
+    public void visitEnd() {
+        if (mv != null) {
+            mv.visitEnd();
+        }
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/org/objectweb/asm/ModuleWriter.class b/tests/test_data/std/jdk/internal/org/objectweb/asm/ModuleWriter.class
new file mode 100644
index 0000000000000000000000000000000000000000..8257f4c8d877ba9bbe50cfe665a9e88a8c13491c
GIT binary patch
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/org/objectweb/asm/ModuleWriter.java b/tests/test_data/std/jdk/internal/org/objectweb/asm/ModuleWriter.java
new file mode 100644
index 00000000..18b1a22f
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/org/objectweb/asm/ModuleWriter.java
@@ -0,0 +1,285 @@
+/*
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/*
+ * This file is available under and governed by the GNU General Public
+ * License version 2 only, as published by the Free Software Foundation.
+ * However, the following notice accompanied the original version of this
+ * file:
+ *
+ * ASM: a very small and fast Java bytecode manipulation framework
+ * Copyright (c) 2000-2011 INRIA, France Telecom
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the copyright holders nor the names of its
+ *    contributors may be used to endorse or promote products derived from
+ *    this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+package jdk.internal.org.objectweb.asm;
+
+/**
+ * A {@link ModuleVisitor} that generates the corresponding Module, ModulePackages and
+ * ModuleMainClass attributes, as defined in the Java Virtual Machine Specification (JVMS).
+ *
+ * @see <a href="https://docs.oracle.com/javase/specs/jvms/se9/html/jvms-4.html#jvms-4.7.25">JVMS
+ *     4.7.25</a>
+ * @see <a href="https://docs.oracle.com/javase/specs/jvms/se9/html/jvms-4.html#jvms-4.7.26">JVMS
+ *     4.7.26</a>
+ * @see <a href="https://docs.oracle.com/javase/specs/jvms/se9/html/jvms-4.html#jvms-4.7.27">JVMS
+ *     4.7.27</a>
+ * @author Remi Forax
+ * @author Eric Bruneton
+ */
+final class ModuleWriter extends ModuleVisitor {
+
+    /** Where the constants used in this AnnotationWriter must be stored. */
+    private final SymbolTable symbolTable;
+
+    /** The module_name_index field of the JVMS Module attribute. */
+    private final int moduleNameIndex;
+
+    /** The module_flags field of the JVMS Module attribute. */
+    private final int moduleFlags;
+
+    /** The module_version_index field of the JVMS Module attribute. */
+    private final int moduleVersionIndex;
+
+    /** The requires_count field of the JVMS Module attribute. */
+    private int requiresCount;
+
+    /** The binary content of the 'requires' array of the JVMS Module attribute. */
+    private final ByteVector requires;
+
+    /** The exports_count field of the JVMS Module attribute. */
+    private int exportsCount;
+
+    /** The binary content of the 'exports' array of the JVMS Module attribute. */
+    private final ByteVector exports;
+
+    /** The opens_count field of the JVMS Module attribute. */
+    private int opensCount;
+
+    /** The binary content of the 'opens' array of the JVMS Module attribute. */
+    private final ByteVector opens;
+
+    /** The uses_count field of the JVMS Module attribute. */
+    private int usesCount;
+
+    /** The binary content of the 'uses_index' array of the JVMS Module attribute. */
+    private final ByteVector usesIndex;
+
+    /** The provides_count field of the JVMS Module attribute. */
+    private int providesCount;
+
+    /** The binary content of the 'provides' array of the JVMS Module attribute. */
+    private final ByteVector provides;
+
+    /** The provides_count field of the JVMS ModulePackages attribute. */
+    private int packageCount;
+
+    /** The binary content of the 'package_index' array of the JVMS ModulePackages attribute. */
+    private final ByteVector packageIndex;
+
+    /** The main_class_index field of the JVMS ModuleMainClass attribute, or 0. */
+    private int mainClassIndex;
+
+    ModuleWriter(final SymbolTable symbolTable, final int name, final int access, final int version) {
+        super(/* latest api = */ Opcodes.ASM9);
+        this.symbolTable = symbolTable;
+        this.moduleNameIndex = name;
+        this.moduleFlags = access;
+        this.moduleVersionIndex = version;
+        this.requires = new ByteVector();
+        this.exports = new ByteVector();
+        this.opens = new ByteVector();
+        this.usesIndex = new ByteVector();
+        this.provides = new ByteVector();
+        this.packageIndex = new ByteVector();
+    }
+
+    @Override
+    public void visitMainClass(final String mainClass) {
+        this.mainClassIndex = symbolTable.addConstantClass(mainClass).index;
+    }
+
+    @Override
+    public void visitPackage(final String packaze) {
+        packageIndex.putShort(symbolTable.addConstantPackage(packaze).index);
+        packageCount++;
+    }
+
+    @Override
+    public void visitRequire(final String module, final int access, final String version) {
+        requires
+                .putShort(symbolTable.addConstantModule(module).index)
+                .putShort(access)
+                .putShort(version == null ? 0 : symbolTable.addConstantUtf8(version));
+        requiresCount++;
+    }
+
+    @Override
+    public void visitExport(final String packaze, final int access, final String... modules) {
+        exports.putShort(symbolTable.addConstantPackage(packaze).index).putShort(access);
+        if (modules == null) {
+            exports.putShort(0);
+        } else {
+            exports.putShort(modules.length);
+            for (String module : modules) {
+                exports.putShort(symbolTable.addConstantModule(module).index);
+            }
+        }
+        exportsCount++;
+    }
+
+    @Override
+    public void visitOpen(final String packaze, final int access, final String... modules) {
+        opens.putShort(symbolTable.addConstantPackage(packaze).index).putShort(access);
+        if (modules == null) {
+            opens.putShort(0);
+        } else {
+            opens.putShort(modules.length);
+            for (String module : modules) {
+                opens.putShort(symbolTable.addConstantModule(module).index);
+            }
+        }
+        opensCount++;
+    }
+
+    @Override
+    public void visitUse(final String service) {
+        usesIndex.putShort(symbolTable.addConstantClass(service).index);
+        usesCount++;
+    }
+
+    @Override
+    public void visitProvide(final String service, final String... providers) {
+        provides.putShort(symbolTable.addConstantClass(service).index);
+        provides.putShort(providers.length);
+        for (String provider : providers) {
+            provides.putShort(symbolTable.addConstantClass(provider).index);
+        }
+        providesCount++;
+    }
+
+    @Override
+    public void visitEnd() {
+        // Nothing to do.
+    }
+
+    /**
+      * Returns the number of Module, ModulePackages and ModuleMainClass attributes generated by this
+      * ModuleWriter.
+      *
+      * @return the number of Module, ModulePackages and ModuleMainClass attributes (between 1 and 3).
+      */
+    int getAttributeCount() {
+        return 1 + (packageCount > 0 ? 1 : 0) + (mainClassIndex > 0 ? 1 : 0);
+    }
+
+    /**
+      * Returns the size of the Module, ModulePackages and ModuleMainClass attributes generated by this
+      * ModuleWriter. Also add the names of these attributes in the constant pool.
+      *
+      * @return the size in bytes of the Module, ModulePackages and ModuleMainClass attributes.
+      */
+    int computeAttributesSize() {
+        symbolTable.addConstantUtf8(Constants.MODULE);
+        // 6 attribute header bytes, 6 bytes for name, flags and version, and 5 * 2 bytes for counts.
+        int size =
+                22 + requires.length + exports.length + opens.length + usesIndex.length + provides.length;
+        if (packageCount > 0) {
+            symbolTable.addConstantUtf8(Constants.MODULE_PACKAGES);
+            // 6 attribute header bytes, and 2 bytes for package_count.
+            size += 8 + packageIndex.length;
+        }
+        if (mainClassIndex > 0) {
+            symbolTable.addConstantUtf8(Constants.MODULE_MAIN_CLASS);
+            // 6 attribute header bytes, and 2 bytes for main_class_index.
+            size += 8;
+        }
+        return size;
+    }
+
+    /**
+      * Puts the Module, ModulePackages and ModuleMainClass attributes generated by this ModuleWriter
+      * in the given ByteVector.
+      *
+      * @param output where the attributes must be put.
+      */
+    void putAttributes(final ByteVector output) {
+        // 6 bytes for name, flags and version, and 5 * 2 bytes for counts.
+        int moduleAttributeLength =
+                16 + requires.length + exports.length + opens.length + usesIndex.length + provides.length;
+        output
+                .putShort(symbolTable.addConstantUtf8(Constants.MODULE))
+                .putInt(moduleAttributeLength)
+                .putShort(moduleNameIndex)
+                .putShort(moduleFlags)
+                .putShort(moduleVersionIndex)
+                .putShort(requiresCount)
+                .putByteArray(requires.data, 0, requires.length)
+                .putShort(exportsCount)
+                .putByteArray(exports.data, 0, exports.length)
+                .putShort(opensCount)
+                .putByteArray(opens.data, 0, opens.length)
+                .putShort(usesCount)
+                .putByteArray(usesIndex.data, 0, usesIndex.length)
+                .putShort(providesCount)
+                .putByteArray(provides.data, 0, provides.length);
+        if (packageCount > 0) {
+            output
+                    .putShort(symbolTable.addConstantUtf8(Constants.MODULE_PACKAGES))
+                    .putInt(2 + packageIndex.length)
+                    .putShort(packageCount)
+                    .putByteArray(packageIndex.data, 0, packageIndex.length);
+        }
+        if (mainClassIndex > 0) {
+            output
+                    .putShort(symbolTable.addConstantUtf8(Constants.MODULE_MAIN_CLASS))
+                    .putInt(2)
+                    .putShort(mainClassIndex);
+        }
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/org/objectweb/asm/Opcodes.class b/tests/test_data/std/jdk/internal/org/objectweb/asm/Opcodes.class
new file mode 100644
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diff --git a/tests/test_data/std/jdk/internal/org/objectweb/asm/Opcodes.java b/tests/test_data/std/jdk/internal/org/objectweb/asm/Opcodes.java
new file mode 100644
index 00000000..8353b787
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/org/objectweb/asm/Opcodes.java
@@ -0,0 +1,590 @@
+/*
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/*
+ * This file is available under and governed by the GNU General Public
+ * License version 2 only, as published by the Free Software Foundation.
+ * However, the following notice accompanied the original version of this
+ * file:
+ *
+ * ASM: a very small and fast Java bytecode manipulation framework
+ * Copyright (c) 2000-2011 INRIA, France Telecom
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the copyright holders nor the names of its
+ *    contributors may be used to endorse or promote products derived from
+ *    this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+package jdk.internal.org.objectweb.asm;
+
+/**
+ * The JVM opcodes, access flags and array type codes. This interface does not define all the JVM
+ * opcodes because some opcodes are automatically handled. For example, the xLOAD and xSTORE opcodes
+ * are automatically replaced by xLOAD_n and xSTORE_n opcodes when possible. The xLOAD_n and
+ * xSTORE_n opcodes are therefore not defined in this interface. Likewise for LDC, automatically
+ * replaced by LDC_W or LDC2_W when necessary, WIDE, GOTO_W and JSR_W.
+ *
+ * @see <a href="https://docs.oracle.com/javase/specs/jvms/se11/html/jvms-6.html">JVMS 6</a>
+ * @author Eric Bruneton
+ * @author Eugene Kuleshov
+ */
+// DontCheck(InterfaceIsType): can't be fixed (for backward binary compatibility).
+public interface Opcodes {
+
+    // ASM API versions.
+
+    int ASM4 = 4 << 16 | 0 << 8;
+    int ASM5 = 5 << 16 | 0 << 8;
+    int ASM6 = 6 << 16 | 0 << 8;
+    int ASM7 = 7 << 16 | 0 << 8;
+    int ASM8 = 8 << 16 | 0 << 8;
+    int ASM9 = 9 << 16 | 0 << 8;
+
+    /*
+      * Internal flags used to redirect calls to deprecated methods. For instance, if a visitOldStuff
+      * method in API_OLD is deprecated and replaced with visitNewStuff in API_NEW, then the
+      * redirection should be done as follows:
+      *
+      * <pre>
+      * public class StuffVisitor {
+      *   ...
+      *
+      *   &#64;Deprecated public void visitOldStuff(int arg, ...) {
+      *     // SOURCE_DEPRECATED means "a call from a deprecated method using the old 'api' value".
+      *     visitNewStuf(arg | (api &#60; API_NEW ? SOURCE_DEPRECATED : 0), ...);
+      *   }
+      *
+      *   public void visitNewStuff(int argAndSource, ...) {
+      *     if (api &#60; API_NEW &#38;&#38; (argAndSource &#38; SOURCE_DEPRECATED) == 0) {
+      *       visitOldStuff(argAndSource, ...);
+      *     } else {
+      *       int arg = argAndSource &#38; ~SOURCE_MASK;
+      *       [ do stuff ]
+      *     }
+      *   }
+      * }
+      * </pre>
+      *
+      * <p>If 'api' is equal to API_NEW, there are two cases:
+      *
+      * <ul>
+      *   <li>call visitNewStuff: the redirection test is skipped and 'do stuff' is executed directly.
+      *   <li>call visitOldSuff: the source is not set to SOURCE_DEPRECATED before calling
+      *       visitNewStuff, but the redirection test is skipped anyway in visitNewStuff, which
+      *       directly executes 'do stuff'.
+      * </ul>
+      *
+      * <p>If 'api' is equal to API_OLD, there are two cases:
+      *
+      * <ul>
+      *   <li>call visitOldSuff: the source is set to SOURCE_DEPRECATED before calling visitNewStuff.
+      *       Because of this visitNewStuff does not redirect back to visitOldStuff, and instead
+      *       executes 'do stuff'.
+      *   <li>call visitNewStuff: the call is redirected to visitOldStuff because the source is 0.
+      *       visitOldStuff now sets the source to SOURCE_DEPRECATED and calls visitNewStuff back. This
+      *       time visitNewStuff does not redirect the call, and instead executes 'do stuff'.
+      * </ul>
+      *
+      * <h1>User subclasses</h1>
+      *
+      * <p>If a user subclass overrides one of these methods, there are only two cases: either 'api' is
+      * API_OLD and visitOldStuff is overridden (and visitNewStuff is not), or 'api' is API_NEW or
+      * more, and visitNewStuff is overridden (and visitOldStuff is not). Any other case is a user
+      * programming error.
+      *
+      * <p>If 'api' is equal to API_NEW, the class hierarchy is equivalent to
+      *
+      * <pre>
+      * public class StuffVisitor {
+      *   &#64;Deprecated public void visitOldStuff(int arg, ...) { visitNewStuf(arg, ...); }
+      *   public void visitNewStuff(int arg, ...) { [ do stuff ] }
+      * }
+      * class UserStuffVisitor extends StuffVisitor {
+      *   &#64;Override public void visitNewStuff(int arg, ...) {
+      *     super.visitNewStuff(int arg, ...); // optional
+      *     [ do user stuff ]
+      *   }
+      * }
+      * </pre>
+      *
+      * <p>It is then obvious that whether visitNewStuff or visitOldStuff is called, 'do stuff' and 'do
+      * user stuff' will be executed, in this order.
+      *
+      * <p>If 'api' is equal to API_OLD, the class hierarchy is equivalent to
+      *
+      * <pre>
+      * public class StuffVisitor {
+      *   &#64;Deprecated public void visitOldStuff(int arg, ...) {
+      *     visitNewStuff(arg | SOURCE_DEPRECATED, ...);
+      *   }
+      *   public void visitNewStuff(int argAndSource...) {
+      *     if ((argAndSource & SOURCE_DEPRECATED) == 0) {
+      *       visitOldStuff(argAndSource, ...);
+      *     } else {
+      *       int arg = argAndSource &#38; ~SOURCE_MASK;
+      *       [ do stuff ]
+      *     }
+      *   }
+      * }
+      * class UserStuffVisitor extends StuffVisitor {
+      *   &#64;Override public void visitOldStuff(int arg, ...) {
+      *     super.visitOldStuff(int arg, ...); // optional
+      *     [ do user stuff ]
+      *   }
+      * }
+      * </pre>
+      *
+      * <p>and there are two cases:
+      *
+      * <ul>
+      *   <li>call visitOldStuff: in the call to super.visitOldStuff, the source is set to
+      *       SOURCE_DEPRECATED and visitNewStuff is called. Here 'do stuff' is run because the source
+      *       was previously set to SOURCE_DEPRECATED, and execution eventually returns to
+      *       UserStuffVisitor.visitOldStuff, where 'do user stuff' is run.
+      *   <li>call visitNewStuff: the call is redirected to UserStuffVisitor.visitOldStuff because the
+      *       source is 0. Execution continues as in the previous case, resulting in 'do stuff' and 'do
+      *       user stuff' being executed, in this order.
+      * </ul>
+      *
+      * <h1>ASM subclasses</h1>
+      *
+      * <p>In ASM packages, subclasses of StuffVisitor can typically be sub classed again by the user,
+      * and can be used with API_OLD or API_NEW. Because of this, if such a subclass must override
+      * visitNewStuff, it must do so in the following way (and must not override visitOldStuff):
+      *
+      * <pre>
+      * public class AsmStuffVisitor extends StuffVisitor {
+      *   &#64;Override public void visitNewStuff(int argAndSource, ...) {
+      *     if (api &#60; API_NEW &#38;&#38; (argAndSource &#38; SOURCE_DEPRECATED) == 0) {
+      *       super.visitNewStuff(argAndSource, ...);
+      *       return;
+      *     }
+      *     super.visitNewStuff(argAndSource, ...); // optional
+      *     int arg = argAndSource &#38; ~SOURCE_MASK;
+      *     [ do other stuff ]
+      *   }
+      * }
+      * </pre>
+      *
+      * <p>If a user class extends this with 'api' equal to API_NEW, the class hierarchy is equivalent
+      * to
+      *
+      * <pre>
+      * public class StuffVisitor {
+      *   &#64;Deprecated public void visitOldStuff(int arg, ...) { visitNewStuf(arg, ...); }
+      *   public void visitNewStuff(int arg, ...) { [ do stuff ] }
+      * }
+      * public class AsmStuffVisitor extends StuffVisitor {
+      *   &#64;Override public void visitNewStuff(int arg, ...) {
+      *     super.visitNewStuff(arg, ...);
+      *     [ do other stuff ]
+      *   }
+      * }
+      * class UserStuffVisitor extends StuffVisitor {
+      *   &#64;Override public void visitNewStuff(int arg, ...) {
+      *     super.visitNewStuff(int arg, ...);
+      *     [ do user stuff ]
+      *   }
+      * }
+      * </pre>
+      *
+      * <p>It is then obvious that whether visitNewStuff or visitOldStuff is called, 'do stuff', 'do
+      * other stuff' and 'do user stuff' will be executed, in this order. If, on the other hand, a user
+      * class extends AsmStuffVisitor with 'api' equal to API_OLD, the class hierarchy is equivalent to
+      *
+      * <pre>
+      * public class StuffVisitor {
+      *   &#64;Deprecated public void visitOldStuff(int arg, ...) {
+      *     visitNewStuf(arg | SOURCE_DEPRECATED, ...);
+      *   }
+      *   public void visitNewStuff(int argAndSource, ...) {
+      *     if ((argAndSource & SOURCE_DEPRECATED) == 0) {
+      *       visitOldStuff(argAndSource, ...);
+      *     } else {
+      *       int arg = argAndSource &#38; ~SOURCE_MASK;
+      *       [ do stuff ]
+      *     }
+      *   }
+      * }
+      * public class AsmStuffVisitor extends StuffVisitor {
+      *   &#64;Override public void visitNewStuff(int argAndSource, ...) {
+      *     if ((argAndSource &#38; SOURCE_DEPRECATED) == 0) {
+      *       super.visitNewStuff(argAndSource, ...);
+      *       return;
+      *     }
+      *     super.visitNewStuff(argAndSource, ...); // optional
+      *     int arg = argAndSource &#38; ~SOURCE_MASK;
+      *     [ do other stuff ]
+      *   }
+      * }
+      * class UserStuffVisitor extends StuffVisitor {
+      *   &#64;Override public void visitOldStuff(int arg, ...) {
+      *     super.visitOldStuff(arg, ...);
+      *     [ do user stuff ]
+      *   }
+      * }
+      * </pre>
+      *
+      * <p>and, here again, whether visitNewStuff or visitOldStuff is called, 'do stuff', 'do other
+      * stuff' and 'do user stuff' will be executed, in this order (exercise left to the reader).
+      *
+      * <h1>Notes</h1>
+      *
+      * <ul>
+      *   <li>the SOURCE_DEPRECATED flag is set only if 'api' is API_OLD, just before calling
+      *       visitNewStuff. By hypothesis, this method is not overridden by the user. Therefore, user
+      *       classes can never see this flag. Only ASM subclasses must take care of extracting the
+      *       actual argument value by clearing the source flags.
+      *   <li>because the SOURCE_DEPRECATED flag is immediately cleared in the caller, the caller can
+      *       call visitOldStuff or visitNewStuff (in 'do stuff' and 'do user stuff') on a delegate
+      *       visitor without any risks (breaking the redirection logic, "leaking" the flag, etc).
+      *   <li>all the scenarios discussed above are unit tested in MethodVisitorTest.
+      * </ul>
+      */
+
+    int SOURCE_DEPRECATED = 0x100;
+    int SOURCE_MASK = SOURCE_DEPRECATED;
+
+    // Java ClassFile versions (the minor version is stored in the 16 most significant bits, and the
+    // major version in the 16 least significant bits).
+
+    int V1_1 = 3 << 16 | 45;
+    int V1_2 = 0 << 16 | 46;
+    int V1_3 = 0 << 16 | 47;
+    int V1_4 = 0 << 16 | 48;
+    int V1_5 = 0 << 16 | 49;
+    int V1_6 = 0 << 16 | 50;
+    int V1_7 = 0 << 16 | 51;
+    int V1_8 = 0 << 16 | 52;
+    int V9 = 0 << 16 | 53;
+    int V10 = 0 << 16 | 54;
+    int V11 = 0 << 16 | 55;
+    int V12 = 0 << 16 | 56;
+    int V13 = 0 << 16 | 57;
+    int V14 = 0 << 16 | 58;
+    int V15 = 0 << 16 | 59;
+    int V16 = 0 << 16 | 60;
+    int V17 = 0 << 16 | 61;
+    int V18 = 0 << 16 | 62;
+    int V19 = 0 << 16 | 63;
+    int V20 = 0 << 16 | 64;
+    int V21 = 0 << 16 | 65;
+    int V22 = 0 << 16 | 66;
+    int V23 = 0 << 16 | 67;
+
+    /**
+      * Version flag indicating that the class is using 'preview' features.
+      *
+      * <p>{@code version & V_PREVIEW == V_PREVIEW} tests if a version is flagged with {@code
+      * V_PREVIEW}.
+      */
+    int V_PREVIEW = 0xFFFF0000;
+
+    // Access flags values, defined in
+    // - https://docs.oracle.com/javase/specs/jvms/se9/html/jvms-4.html#jvms-4.1-200-E.1
+    // - https://docs.oracle.com/javase/specs/jvms/se9/html/jvms-4.html#jvms-4.5-200-A.1
+    // - https://docs.oracle.com/javase/specs/jvms/se9/html/jvms-4.html#jvms-4.6-200-A.1
+    // - https://docs.oracle.com/javase/specs/jvms/se9/html/jvms-4.html#jvms-4.7.25
+
+    int ACC_PUBLIC = 0x0001; // class, field, method
+    int ACC_PRIVATE = 0x0002; // class, field, method
+    int ACC_PROTECTED = 0x0004; // class, field, method
+    int ACC_STATIC = 0x0008; // field, method
+    int ACC_FINAL = 0x0010; // class, field, method, parameter
+    int ACC_SUPER = 0x0020; // class
+    int ACC_SYNCHRONIZED = 0x0020; // method
+    int ACC_OPEN = 0x0020; // module
+    int ACC_TRANSITIVE = 0x0020; // module requires
+    int ACC_VOLATILE = 0x0040; // field
+    int ACC_BRIDGE = 0x0040; // method
+    int ACC_STATIC_PHASE = 0x0040; // module requires
+    int ACC_VARARGS = 0x0080; // method
+    int ACC_TRANSIENT = 0x0080; // field
+    int ACC_NATIVE = 0x0100; // method
+    int ACC_INTERFACE = 0x0200; // class
+    int ACC_ABSTRACT = 0x0400; // class, method
+    int ACC_STRICT = 0x0800; // method
+    int ACC_SYNTHETIC = 0x1000; // class, field, method, parameter, module *
+    int ACC_ANNOTATION = 0x2000; // class
+    int ACC_ENUM = 0x4000; // class(?) field inner
+    int ACC_MANDATED = 0x8000; // field, method, parameter, module, module *
+    int ACC_MODULE = 0x8000; // class
+
+    // ASM specific access flags.
+    // WARNING: the 16 least significant bits must NOT be used, to avoid conflicts with standard
+    // access flags, and also to make sure that these flags are automatically filtered out when
+    // written in class files (because access flags are stored using 16 bits only).
+
+    int ACC_RECORD = 0x10000; // class
+    int ACC_DEPRECATED = 0x20000; // class, field, method
+
+    // Possible values for the type operand of the NEWARRAY instruction.
+    // See https://docs.oracle.com/javase/specs/jvms/se9/html/jvms-6.html#jvms-6.5.newarray.
+
+    int T_BOOLEAN = 4;
+    int T_CHAR = 5;
+    int T_FLOAT = 6;
+    int T_DOUBLE = 7;
+    int T_BYTE = 8;
+    int T_SHORT = 9;
+    int T_INT = 10;
+    int T_LONG = 11;
+
+    // Possible values for the reference_kind field of CONSTANT_MethodHandle_info structures.
+    // See https://docs.oracle.com/javase/specs/jvms/se9/html/jvms-4.html#jvms-4.4.8.
+
+    int H_GETFIELD = 1;
+    int H_GETSTATIC = 2;
+    int H_PUTFIELD = 3;
+    int H_PUTSTATIC = 4;
+    int H_INVOKEVIRTUAL = 5;
+    int H_INVOKESTATIC = 6;
+    int H_INVOKESPECIAL = 7;
+    int H_NEWINVOKESPECIAL = 8;
+    int H_INVOKEINTERFACE = 9;
+
+    // ASM specific stack map frame types, used in {@link ClassVisitor#visitFrame}.
+
+    /** An expanded frame. See {@link ClassReader#EXPAND_FRAMES}. */
+    int F_NEW = -1;
+
+    /** A compressed frame with complete frame data. */
+    int F_FULL = 0;
+
+    /**
+      * A compressed frame where locals are the same as the locals in the previous frame, except that
+      * additional 1-3 locals are defined, and with an empty stack.
+      */
+    int F_APPEND = 1;
+
+    /**
+      * A compressed frame where locals are the same as the locals in the previous frame, except that
+      * the last 1-3 locals are absent and with an empty stack.
+      */
+    int F_CHOP = 2;
+
+    /**
+      * A compressed frame with exactly the same locals as the previous frame and with an empty stack.
+      */
+    int F_SAME = 3;
+
+    /**
+      * A compressed frame with exactly the same locals as the previous frame and with a single value
+      * on the stack.
+      */
+    int F_SAME1 = 4;
+
+    // Standard stack map frame element types, used in {@link ClassVisitor#visitFrame}.
+
+    Integer TOP = Frame.ITEM_TOP;
+    Integer INTEGER = Frame.ITEM_INTEGER;
+    Integer FLOAT = Frame.ITEM_FLOAT;
+    Integer DOUBLE = Frame.ITEM_DOUBLE;
+    Integer LONG = Frame.ITEM_LONG;
+    Integer NULL = Frame.ITEM_NULL;
+    Integer UNINITIALIZED_THIS = Frame.ITEM_UNINITIALIZED_THIS;
+
+    // The JVM opcode values (with the MethodVisitor method name used to visit them in comment, and
+    // where '-' means 'same method name as on the previous line').
+    // See https://docs.oracle.com/javase/specs/jvms/se9/html/jvms-6.html.
+
+    int NOP = 0; // visitInsn
+    int ACONST_NULL = 1; // -
+    int ICONST_M1 = 2; // -
+    int ICONST_0 = 3; // -
+    int ICONST_1 = 4; // -
+    int ICONST_2 = 5; // -
+    int ICONST_3 = 6; // -
+    int ICONST_4 = 7; // -
+    int ICONST_5 = 8; // -
+    int LCONST_0 = 9; // -
+    int LCONST_1 = 10; // -
+    int FCONST_0 = 11; // -
+    int FCONST_1 = 12; // -
+    int FCONST_2 = 13; // -
+    int DCONST_0 = 14; // -
+    int DCONST_1 = 15; // -
+    int BIPUSH = 16; // visitIntInsn
+    int SIPUSH = 17; // -
+    int LDC = 18; // visitLdcInsn
+    int ILOAD = 21; // visitVarInsn
+    int LLOAD = 22; // -
+    int FLOAD = 23; // -
+    int DLOAD = 24; // -
+    int ALOAD = 25; // -
+    int IALOAD = 46; // visitInsn
+    int LALOAD = 47; // -
+    int FALOAD = 48; // -
+    int DALOAD = 49; // -
+    int AALOAD = 50; // -
+    int BALOAD = 51; // -
+    int CALOAD = 52; // -
+    int SALOAD = 53; // -
+    int ISTORE = 54; // visitVarInsn
+    int LSTORE = 55; // -
+    int FSTORE = 56; // -
+    int DSTORE = 57; // -
+    int ASTORE = 58; // -
+    int IASTORE = 79; // visitInsn
+    int LASTORE = 80; // -
+    int FASTORE = 81; // -
+    int DASTORE = 82; // -
+    int AASTORE = 83; // -
+    int BASTORE = 84; // -
+    int CASTORE = 85; // -
+    int SASTORE = 86; // -
+    int POP = 87; // -
+    int POP2 = 88; // -
+    int DUP = 89; // -
+    int DUP_X1 = 90; // -
+    int DUP_X2 = 91; // -
+    int DUP2 = 92; // -
+    int DUP2_X1 = 93; // -
+    int DUP2_X2 = 94; // -
+    int SWAP = 95; // -
+    int IADD = 96; // -
+    int LADD = 97; // -
+    int FADD = 98; // -
+    int DADD = 99; // -
+    int ISUB = 100; // -
+    int LSUB = 101; // -
+    int FSUB = 102; // -
+    int DSUB = 103; // -
+    int IMUL = 104; // -
+    int LMUL = 105; // -
+    int FMUL = 106; // -
+    int DMUL = 107; // -
+    int IDIV = 108; // -
+    int LDIV = 109; // -
+    int FDIV = 110; // -
+    int DDIV = 111; // -
+    int IREM = 112; // -
+    int LREM = 113; // -
+    int FREM = 114; // -
+    int DREM = 115; // -
+    int INEG = 116; // -
+    int LNEG = 117; // -
+    int FNEG = 118; // -
+    int DNEG = 119; // -
+    int ISHL = 120; // -
+    int LSHL = 121; // -
+    int ISHR = 122; // -
+    int LSHR = 123; // -
+    int IUSHR = 124; // -
+    int LUSHR = 125; // -
+    int IAND = 126; // -
+    int LAND = 127; // -
+    int IOR = 128; // -
+    int LOR = 129; // -
+    int IXOR = 130; // -
+    int LXOR = 131; // -
+    int IINC = 132; // visitIincInsn
+    int I2L = 133; // visitInsn
+    int I2F = 134; // -
+    int I2D = 135; // -
+    int L2I = 136; // -
+    int L2F = 137; // -
+    int L2D = 138; // -
+    int F2I = 139; // -
+    int F2L = 140; // -
+    int F2D = 141; // -
+    int D2I = 142; // -
+    int D2L = 143; // -
+    int D2F = 144; // -
+    int I2B = 145; // -
+    int I2C = 146; // -
+    int I2S = 147; // -
+    int LCMP = 148; // -
+    int FCMPL = 149; // -
+    int FCMPG = 150; // -
+    int DCMPL = 151; // -
+    int DCMPG = 152; // -
+    int IFEQ = 153; // visitJumpInsn
+    int IFNE = 154; // -
+    int IFLT = 155; // -
+    int IFGE = 156; // -
+    int IFGT = 157; // -
+    int IFLE = 158; // -
+    int IF_ICMPEQ = 159; // -
+    int IF_ICMPNE = 160; // -
+    int IF_ICMPLT = 161; // -
+    int IF_ICMPGE = 162; // -
+    int IF_ICMPGT = 163; // -
+    int IF_ICMPLE = 164; // -
+    int IF_ACMPEQ = 165; // -
+    int IF_ACMPNE = 166; // -
+    int GOTO = 167; // -
+    int JSR = 168; // -
+    int RET = 169; // visitVarInsn
+    int TABLESWITCH = 170; // visiTableSwitchInsn
+    int LOOKUPSWITCH = 171; // visitLookupSwitch
+    int IRETURN = 172; // visitInsn
+    int LRETURN = 173; // -
+    int FRETURN = 174; // -
+    int DRETURN = 175; // -
+    int ARETURN = 176; // -
+    int RETURN = 177; // -
+    int GETSTATIC = 178; // visitFieldInsn
+    int PUTSTATIC = 179; // -
+    int GETFIELD = 180; // -
+    int PUTFIELD = 181; // -
+    int INVOKEVIRTUAL = 182; // visitMethodInsn
+    int INVOKESPECIAL = 183; // -
+    int INVOKESTATIC = 184; // -
+    int INVOKEINTERFACE = 185; // -
+    int INVOKEDYNAMIC = 186; // visitInvokeDynamicInsn
+    int NEW = 187; // visitTypeInsn
+    int NEWARRAY = 188; // visitIntInsn
+    int ANEWARRAY = 189; // visitTypeInsn
+    int ARRAYLENGTH = 190; // visitInsn
+    int ATHROW = 191; // -
+    int CHECKCAST = 192; // visitTypeInsn
+    int INSTANCEOF = 193; // -
+    int MONITORENTER = 194; // visitInsn
+    int MONITOREXIT = 195; // -
+    int MULTIANEWARRAY = 197; // visitMultiANewArrayInsn
+    int IFNULL = 198; // visitJumpInsn
+    int IFNONNULL = 199; // -
+}
diff --git a/tests/test_data/std/jdk/internal/org/objectweb/asm/RecordComponentVisitor.class b/tests/test_data/std/jdk/internal/org/objectweb/asm/RecordComponentVisitor.class
new file mode 100644
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GIT binary patch
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diff --git a/tests/test_data/std/jdk/internal/org/objectweb/asm/RecordComponentVisitor.java b/tests/test_data/std/jdk/internal/org/objectweb/asm/RecordComponentVisitor.java
new file mode 100644
index 00000000..ad0aad6b
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/org/objectweb/asm/RecordComponentVisitor.java
@@ -0,0 +1,181 @@
+/*
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/*
+ * This file is available under and governed by the GNU General Public
+ * License version 2 only, as published by the Free Software Foundation.
+ * However, the following notice accompanied the original version of this
+ * file:
+ *
+ * ASM: a very small and fast Java bytecode manipulation framework
+ * Copyright (c) 2000-2011 INRIA, France Telecom
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the copyright holders nor the names of its
+ *    contributors may be used to endorse or promote products derived from
+ *    this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+package jdk.internal.org.objectweb.asm;
+
+/**
+ * A visitor to visit a record component. The methods of this class must be called in the following
+ * order: ( {@code visitAnnotation} | {@code visitTypeAnnotation} | {@code visitAttribute} )* {@code
+ * visitEnd}.
+ *
+ * @author Remi Forax
+ * @author Eric Bruneton
+ */
+public abstract class RecordComponentVisitor {
+    /**
+      * The ASM API version implemented by this visitor. The value of this field must be one of {@link
+      * Opcodes#ASM8} or {@link Opcodes#ASM9}.
+      */
+    protected final int api;
+
+    /**
+      * The record visitor to which this visitor must delegate method calls. May be {@literal null}.
+      */
+    protected RecordComponentVisitor delegate;
+
+    /**
+      * Constructs a new {@link RecordComponentVisitor}.
+      *
+      * @param api the ASM API version implemented by this visitor. Must be one of {@link Opcodes#ASM8}
+      *     or {@link Opcodes#ASM9}.
+      */
+    protected RecordComponentVisitor(final int api) {
+        this(api, null);
+    }
+
+    /**
+      * Constructs a new {@link RecordComponentVisitor}.
+      *
+      * @param api the ASM API version implemented by this visitor. Must be {@link Opcodes#ASM8}.
+      * @param recordComponentVisitor the record component visitor to which this visitor must delegate
+      *     method calls. May be null.
+      */
+    protected RecordComponentVisitor(
+            final int api, final RecordComponentVisitor recordComponentVisitor) {
+        if (api != Opcodes.ASM9
+                && api != Opcodes.ASM8
+                && api != Opcodes.ASM7
+                && api != Opcodes.ASM6
+                && api != Opcodes.ASM5
+                && api != Opcodes.ASM4) {
+            throw new IllegalArgumentException("Unsupported api " + api);
+        }
+        this.api = api;
+        this.delegate = recordComponentVisitor;
+    }
+
+    /**
+      * The record visitor to which this visitor must delegate method calls. May be {@literal null}.
+      *
+      * @return the record visitor to which this visitor must delegate method calls, or {@literal
+      *     null}.
+      */
+    public RecordComponentVisitor getDelegate() {
+        return delegate;
+    }
+
+    /**
+      * Visits an annotation of the record component.
+      *
+      * @param descriptor the class descriptor of the annotation class.
+      * @param visible {@literal true} if the annotation is visible at runtime.
+      * @return a visitor to visit the annotation values, or {@literal null} if this visitor is not
+      *     interested in visiting this annotation.
+      */
+    public AnnotationVisitor visitAnnotation(final String descriptor, final boolean visible) {
+        if (delegate != null) {
+            return delegate.visitAnnotation(descriptor, visible);
+        }
+        return null;
+    }
+
+    /**
+      * Visits an annotation on a type in the record component signature.
+      *
+      * @param typeRef a reference to the annotated type. The sort of this type reference must be
+      *     {@link TypeReference#CLASS_TYPE_PARAMETER}, {@link
+      *     TypeReference#CLASS_TYPE_PARAMETER_BOUND} or {@link TypeReference#CLASS_EXTENDS}. See
+      *     {@link TypeReference}.
+      * @param typePath the path to the annotated type argument, wildcard bound, array element type, or
+      *     static inner type within 'typeRef'. May be {@literal null} if the annotation targets
+      *     'typeRef' as a whole.
+      * @param descriptor the class descriptor of the annotation class.
+      * @param visible {@literal true} if the annotation is visible at runtime.
+      * @return a visitor to visit the annotation values, or {@literal null} if this visitor is not
+      *     interested in visiting this annotation.
+      */
+    public AnnotationVisitor visitTypeAnnotation(
+            final int typeRef, final TypePath typePath, final String descriptor, final boolean visible) {
+        if (delegate != null) {
+            return delegate.visitTypeAnnotation(typeRef, typePath, descriptor, visible);
+        }
+        return null;
+    }
+
+    /**
+      * Visits a non standard attribute of the record component.
+      *
+      * @param attribute an attribute.
+      */
+    public void visitAttribute(final Attribute attribute) {
+        if (delegate != null) {
+            delegate.visitAttribute(attribute);
+        }
+    }
+
+    /**
+      * Visits the end of the record component. This method, which is the last one to be called, is
+      * used to inform the visitor that everything have been visited.
+      */
+    public void visitEnd() {
+        if (delegate != null) {
+            delegate.visitEnd();
+        }
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/org/objectweb/asm/RecordComponentWriter.class b/tests/test_data/std/jdk/internal/org/objectweb/asm/RecordComponentWriter.class
new file mode 100644
index 0000000000000000000000000000000000000000..d16bd064a24ee16e6a83945dce5a033efd9be86f
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HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/org/objectweb/asm/RecordComponentWriter.java b/tests/test_data/std/jdk/internal/org/objectweb/asm/RecordComponentWriter.java
new file mode 100644
index 00000000..3098cf70
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/org/objectweb/asm/RecordComponentWriter.java
@@ -0,0 +1,257 @@
+/*
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/*
+ * This file is available under and governed by the GNU General Public
+ * License version 2 only, as published by the Free Software Foundation.
+ * However, the following notice accompanied the original version of this
+ * file:
+ *
+ * ASM: a very small and fast Java bytecode manipulation framework
+ * Copyright (c) 2000-2011 INRIA, France Telecom
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the copyright holders nor the names of its
+ *    contributors may be used to endorse or promote products derived from
+ *    this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+package jdk.internal.org.objectweb.asm;
+
+final class RecordComponentWriter extends RecordComponentVisitor {
+    /** Where the constants used in this RecordComponentWriter must be stored. */
+    private final SymbolTable symbolTable;
+
+    // Note: fields are ordered as in the record_component_info structure, and those related to
+    // attributes are ordered as in Section 4.7 of the JVMS.
+
+    /** The name_index field of the Record attribute. */
+    private final int nameIndex;
+
+    /** The descriptor_index field of the Record attribute. */
+    private final int descriptorIndex;
+
+    /**
+      * The signature_index field of the Signature attribute of this record component, or 0 if there is
+      * no Signature attribute.
+      */
+    private int signatureIndex;
+
+    /**
+      * The last runtime visible annotation of this record component. The previous ones can be accessed
+      * with the {@link AnnotationWriter#previousAnnotation} field. May be {@literal null}.
+      */
+    private AnnotationWriter lastRuntimeVisibleAnnotation;
+
+    /**
+      * The last runtime invisible annotation of this record component. The previous ones can be
+      * accessed with the {@link AnnotationWriter#previousAnnotation} field. May be {@literal null}.
+      */
+    private AnnotationWriter lastRuntimeInvisibleAnnotation;
+
+    /**
+      * The last runtime visible type annotation of this record component. The previous ones can be
+      * accessed with the {@link AnnotationWriter#previousAnnotation} field. May be {@literal null}.
+      */
+    private AnnotationWriter lastRuntimeVisibleTypeAnnotation;
+
+    /**
+      * The last runtime invisible type annotation of this record component. The previous ones can be
+      * accessed with the {@link AnnotationWriter#previousAnnotation} field. May be {@literal null}.
+      */
+    private AnnotationWriter lastRuntimeInvisibleTypeAnnotation;
+
+    /**
+      * The first non standard attribute of this record component. The next ones can be accessed with
+      * the {@link Attribute#nextAttribute} field. May be {@literal null}.
+      *
+      * <p><b>WARNING</b>: this list stores the attributes in the <i>reverse</i> order of their visit.
+      * firstAttribute is actually the last attribute visited in {@link #visitAttribute(Attribute)}.
+      * The {@link #putRecordComponentInfo(ByteVector)} method writes the attributes in the order
+      * defined by this list, i.e. in the reverse order specified by the user.
+      */
+    private Attribute firstAttribute;
+
+    /**
+      * Constructs a new {@link RecordComponentWriter}.
+      *
+      * @param symbolTable where the constants used in this RecordComponentWriter must be stored.
+      * @param name the record component name.
+      * @param descriptor the record component descriptor (see {@link Type}).
+      * @param signature the record component signature. May be {@literal null}.
+      */
+    RecordComponentWriter(
+            final SymbolTable symbolTable,
+            final String name,
+            final String descriptor,
+            final String signature) {
+        super(/* latest api = */ Opcodes.ASM9);
+        this.symbolTable = symbolTable;
+        this.nameIndex = symbolTable.addConstantUtf8(name);
+        this.descriptorIndex = symbolTable.addConstantUtf8(descriptor);
+        if (signature != null) {
+            this.signatureIndex = symbolTable.addConstantUtf8(signature);
+        }
+    }
+
+    // -----------------------------------------------------------------------------------------------
+    // Implementation of the FieldVisitor abstract class
+    // -----------------------------------------------------------------------------------------------
+
+    @Override
+    public AnnotationVisitor visitAnnotation(final String descriptor, final boolean visible) {
+        if (visible) {
+            return lastRuntimeVisibleAnnotation =
+                    AnnotationWriter.create(symbolTable, descriptor, lastRuntimeVisibleAnnotation);
+        } else {
+            return lastRuntimeInvisibleAnnotation =
+                    AnnotationWriter.create(symbolTable, descriptor, lastRuntimeInvisibleAnnotation);
+        }
+    }
+
+    @Override
+    public AnnotationVisitor visitTypeAnnotation(
+            final int typeRef, final TypePath typePath, final String descriptor, final boolean visible) {
+        if (visible) {
+            return lastRuntimeVisibleTypeAnnotation =
+                    AnnotationWriter.create(
+                            symbolTable, typeRef, typePath, descriptor, lastRuntimeVisibleTypeAnnotation);
+        } else {
+            return lastRuntimeInvisibleTypeAnnotation =
+                    AnnotationWriter.create(
+                            symbolTable, typeRef, typePath, descriptor, lastRuntimeInvisibleTypeAnnotation);
+        }
+    }
+
+    @Override
+    public void visitAttribute(final Attribute attribute) {
+        // Store the attributes in the <i>reverse</i> order of their visit by this method.
+        attribute.nextAttribute = firstAttribute;
+        firstAttribute = attribute;
+    }
+
+    @Override
+    public void visitEnd() {
+        // Nothing to do.
+    }
+
+    // -----------------------------------------------------------------------------------------------
+    // Utility methods
+    // -----------------------------------------------------------------------------------------------
+
+    /**
+      * Returns the size of the record component JVMS structure generated by this
+      * RecordComponentWriter. Also adds the names of the attributes of this record component in the
+      * constant pool.
+      *
+      * @return the size in bytes of the record_component_info of the Record attribute.
+      */
+    int computeRecordComponentInfoSize() {
+        // name_index, descriptor_index and attributes_count fields use 6 bytes.
+        int size = 6;
+        size += Attribute.computeAttributesSize(symbolTable, 0, signatureIndex);
+        size +=
+                AnnotationWriter.computeAnnotationsSize(
+                        lastRuntimeVisibleAnnotation,
+                        lastRuntimeInvisibleAnnotation,
+                        lastRuntimeVisibleTypeAnnotation,
+                        lastRuntimeInvisibleTypeAnnotation);
+        if (firstAttribute != null) {
+            size += firstAttribute.computeAttributesSize(symbolTable);
+        }
+        return size;
+    }
+
+    /**
+      * Puts the content of the record component generated by this RecordComponentWriter into the given
+      * ByteVector.
+      *
+      * @param output where the record_component_info structure must be put.
+      */
+    void putRecordComponentInfo(final ByteVector output) {
+        output.putShort(nameIndex).putShort(descriptorIndex);
+        // Compute and put the attributes_count field.
+        // For ease of reference, we use here the same attribute order as in Section 4.7 of the JVMS.
+        int attributesCount = 0;
+        if (signatureIndex != 0) {
+            ++attributesCount;
+        }
+        if (lastRuntimeVisibleAnnotation != null) {
+            ++attributesCount;
+        }
+        if (lastRuntimeInvisibleAnnotation != null) {
+            ++attributesCount;
+        }
+        if (lastRuntimeVisibleTypeAnnotation != null) {
+            ++attributesCount;
+        }
+        if (lastRuntimeInvisibleTypeAnnotation != null) {
+            ++attributesCount;
+        }
+        if (firstAttribute != null) {
+            attributesCount += firstAttribute.getAttributeCount();
+        }
+        output.putShort(attributesCount);
+        Attribute.putAttributes(symbolTable, 0, signatureIndex, output);
+        AnnotationWriter.putAnnotations(
+                symbolTable,
+                lastRuntimeVisibleAnnotation,
+                lastRuntimeInvisibleAnnotation,
+                lastRuntimeVisibleTypeAnnotation,
+                lastRuntimeInvisibleTypeAnnotation,
+                output);
+        if (firstAttribute != null) {
+            firstAttribute.putAttributes(symbolTable, output);
+        }
+    }
+
+    /**
+      * Collects the attributes of this record component into the given set of attribute prototypes.
+      *
+      * @param attributePrototypes a set of attribute prototypes.
+      */
+    final void collectAttributePrototypes(final Attribute.Set attributePrototypes) {
+        attributePrototypes.addAttributes(firstAttribute);
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/org/objectweb/asm/Symbol.class b/tests/test_data/std/jdk/internal/org/objectweb/asm/Symbol.class
new file mode 100644
index 0000000000000000000000000000000000000000..6d1c4f220f96a3583bdaec2f9ad2232061d8fb75
GIT binary patch
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zp;gr_rBamhO8t^<ieWa?nN~&BOTz>c40EB0hbSqPp)Dfrp{N<MHMB$-W<oE`7=??8
znF>aAPg90I^l>eRKDu01>at#_TgOMCg05&3wQ3db4qch(da=9uK6#IVrx+H)-~)vi
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zRlWR`{-2eD?HawDe5XmzAf>sUqxa4lPS>&<ZCc4_ofErVv%4<m!D7_^#-(?0OMAuJ
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zeSu}-J%RJY1%VafqQE8MeSuZt1Az~THG#{-y1)kUk-(o4R|GbZ=53zNHq9G$FjAuq
zM(V`DNDVj`sqNAT-f8KV-%bn`-At8czaT<425e^k0L!lQ5zk)jV>)}gk92k^+Q(dW
zDb~kAc7D8%<=+DT8vWkjUQ9xiO;aaKBFR$J?$cOeGgxC8Y_M58Al*LVJUTwZF^zo2
zt7gHB*UhWh<bN?#2cPlUqrr?<9}8x@{&AXZ;NhU^3i<IE3)$bX`ZJPQ8W;Y=^*&bl
o%CBUKfR~x%Vc9Bm@-<}G^`NAS^b3QMJ`c21F~b)$9mALZ09D>s0RR91

literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/org/objectweb/asm/Symbol.java b/tests/test_data/std/jdk/internal/org/objectweb/asm/Symbol.java
new file mode 100644
index 00000000..a45f75a0
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/org/objectweb/asm/Symbol.java
@@ -0,0 +1,291 @@
+/*
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/*
+ * This file is available under and governed by the GNU General Public
+ * License version 2 only, as published by the Free Software Foundation.
+ * However, the following notice accompanied the original version of this
+ * file:
+ *
+ * ASM: a very small and fast Java bytecode manipulation framework
+ * Copyright (c) 2000-2011 INRIA, France Telecom
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the copyright holders nor the names of its
+ *    contributors may be used to endorse or promote products derived from
+ *    this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+package jdk.internal.org.objectweb.asm;
+
+/**
+ * An entry of the constant pool, of the BootstrapMethods attribute, or of the (ASM specific) type
+ * table of a class.
+ *
+ * @see <a href="https://docs.oracle.com/javase/specs/jvms/se9/html/jvms-4.html#jvms-4.4">JVMS
+ *     4.4</a>
+ * @see <a href="https://docs.oracle.com/javase/specs/jvms/se9/html/jvms-4.html#jvms-4.7.23">JVMS
+ *     4.7.23</a>
+ * @author Eric Bruneton
+ */
+abstract class Symbol {
+
+    // Tag values for the constant pool entries (using the same order as in the JVMS).
+
+    /** The tag value of CONSTANT_Class_info JVMS structures. */
+    static final int CONSTANT_CLASS_TAG = 7;
+
+    /** The tag value of CONSTANT_Fieldref_info JVMS structures. */
+    static final int CONSTANT_FIELDREF_TAG = 9;
+
+    /** The tag value of CONSTANT_Methodref_info JVMS structures. */
+    static final int CONSTANT_METHODREF_TAG = 10;
+
+    /** The tag value of CONSTANT_InterfaceMethodref_info JVMS structures. */
+    static final int CONSTANT_INTERFACE_METHODREF_TAG = 11;
+
+    /** The tag value of CONSTANT_String_info JVMS structures. */
+    static final int CONSTANT_STRING_TAG = 8;
+
+    /** The tag value of CONSTANT_Integer_info JVMS structures. */
+    static final int CONSTANT_INTEGER_TAG = 3;
+
+    /** The tag value of CONSTANT_Float_info JVMS structures. */
+    static final int CONSTANT_FLOAT_TAG = 4;
+
+    /** The tag value of CONSTANT_Long_info JVMS structures. */
+    static final int CONSTANT_LONG_TAG = 5;
+
+    /** The tag value of CONSTANT_Double_info JVMS structures. */
+    static final int CONSTANT_DOUBLE_TAG = 6;
+
+    /** The tag value of CONSTANT_NameAndType_info JVMS structures. */
+    static final int CONSTANT_NAME_AND_TYPE_TAG = 12;
+
+    /** The tag value of CONSTANT_Utf8_info JVMS structures. */
+    static final int CONSTANT_UTF8_TAG = 1;
+
+    /** The tag value of CONSTANT_MethodHandle_info JVMS structures. */
+    static final int CONSTANT_METHOD_HANDLE_TAG = 15;
+
+    /** The tag value of CONSTANT_MethodType_info JVMS structures. */
+    static final int CONSTANT_METHOD_TYPE_TAG = 16;
+
+    /** The tag value of CONSTANT_Dynamic_info JVMS structures. */
+    static final int CONSTANT_DYNAMIC_TAG = 17;
+
+    /** The tag value of CONSTANT_InvokeDynamic_info JVMS structures. */
+    static final int CONSTANT_INVOKE_DYNAMIC_TAG = 18;
+
+    /** The tag value of CONSTANT_Module_info JVMS structures. */
+    static final int CONSTANT_MODULE_TAG = 19;
+
+    /** The tag value of CONSTANT_Package_info JVMS structures. */
+    static final int CONSTANT_PACKAGE_TAG = 20;
+
+    // Tag values for the BootstrapMethods attribute entries (ASM specific tag).
+
+    /** The tag value of the BootstrapMethods attribute entries. */
+    static final int BOOTSTRAP_METHOD_TAG = 64;
+
+    // Tag values for the type table entries (ASM specific tags).
+
+    /** The tag value of a normal type entry in the (ASM specific) type table of a class. */
+    static final int TYPE_TAG = 128;
+
+    /**
+      * The tag value of an uninitialized type entry in the type table of a class. This type is used
+      * for the normal case where the NEW instruction is before the &lt;init&gt; constructor call (in
+      * bytecode offset order), i.e. when the label of the NEW instruction is resolved when the
+      * constructor call is visited. If the NEW instruction is after the constructor call, use the
+      * {@link #FORWARD_UNINITIALIZED_TYPE_TAG} tag value instead.
+      */
+    static final int UNINITIALIZED_TYPE_TAG = 129;
+
+    /**
+      * The tag value of an uninitialized type entry in the type table of a class. This type is used
+      * for the unusual case where the NEW instruction is after the &lt;init&gt; constructor call (in
+      * bytecode offset order), i.e. when the label of the NEW instruction is not resolved when the
+      * constructor call is visited. If the NEW instruction is before the constructor call, use the
+      * {@link #UNINITIALIZED_TYPE_TAG} tag value instead.
+      */
+    static final int FORWARD_UNINITIALIZED_TYPE_TAG = 130;
+
+    /** The tag value of a merged type entry in the (ASM specific) type table of a class. */
+    static final int MERGED_TYPE_TAG = 131;
+
+    // Instance fields.
+
+    /**
+      * The index of this symbol in the constant pool, in the BootstrapMethods attribute, or in the
+      * (ASM specific) type table of a class (depending on the {@link #tag} value).
+      */
+    final int index;
+
+    /**
+      * A tag indicating the type of this symbol. Must be one of the static tag values defined in this
+      * class.
+      */
+    final int tag;
+
+    /**
+      * The internal name of the owner class of this symbol. Only used for {@link
+      * #CONSTANT_FIELDREF_TAG}, {@link #CONSTANT_METHODREF_TAG}, {@link
+      * #CONSTANT_INTERFACE_METHODREF_TAG}, and {@link #CONSTANT_METHOD_HANDLE_TAG} symbols.
+      */
+    final String owner;
+
+    /**
+      * The name of the class field or method corresponding to this symbol. Only used for {@link
+      * #CONSTANT_FIELDREF_TAG}, {@link #CONSTANT_METHODREF_TAG}, {@link
+      * #CONSTANT_INTERFACE_METHODREF_TAG}, {@link #CONSTANT_NAME_AND_TYPE_TAG}, {@link
+      * #CONSTANT_METHOD_HANDLE_TAG}, {@link #CONSTANT_DYNAMIC_TAG} and {@link
+      * #CONSTANT_INVOKE_DYNAMIC_TAG} symbols.
+      */
+    final String name;
+
+    /**
+      * The string value of this symbol. This is:
+      *
+      * <ul>
+      *   <li>a field or method descriptor for {@link #CONSTANT_FIELDREF_TAG}, {@link
+      *       #CONSTANT_METHODREF_TAG}, {@link #CONSTANT_INTERFACE_METHODREF_TAG}, {@link
+      *       #CONSTANT_NAME_AND_TYPE_TAG}, {@link #CONSTANT_METHOD_HANDLE_TAG}, {@link
+      *       #CONSTANT_METHOD_TYPE_TAG}, {@link #CONSTANT_DYNAMIC_TAG} and {@link
+      *       #CONSTANT_INVOKE_DYNAMIC_TAG} symbols,
+      *   <li>an arbitrary string for {@link #CONSTANT_UTF8_TAG} and {@link #CONSTANT_STRING_TAG}
+      *       symbols,
+      *   <li>an internal class name for {@link #CONSTANT_CLASS_TAG}, {@link #TYPE_TAG}, {@link
+      *       #UNINITIALIZED_TYPE_TAG} and {@link #FORWARD_UNINITIALIZED_TYPE_TAG} symbols,
+      *   <li>{@literal null} for the other types of symbol.
+      * </ul>
+      */
+    final String value;
+
+    /**
+      * The numeric value of this symbol. This is:
+      *
+      * <ul>
+      *   <li>the symbol's value for {@link #CONSTANT_INTEGER_TAG},{@link #CONSTANT_FLOAT_TAG}, {@link
+      *       #CONSTANT_LONG_TAG}, {@link #CONSTANT_DOUBLE_TAG},
+      *   <li>the CONSTANT_MethodHandle_info reference_kind field value for {@link
+      *       #CONSTANT_METHOD_HANDLE_TAG} symbols,
+      *   <li>the CONSTANT_InvokeDynamic_info bootstrap_method_attr_index field value for {@link
+      *       #CONSTANT_INVOKE_DYNAMIC_TAG} symbols,
+      *   <li>the offset of a bootstrap method in the BootstrapMethods boostrap_methods array, for
+      *       {@link #CONSTANT_DYNAMIC_TAG} or {@link #BOOTSTRAP_METHOD_TAG} symbols,
+      *   <li>the bytecode offset of the NEW instruction that created an {@link
+      *       Frame#ITEM_UNINITIALIZED} type for {@link #UNINITIALIZED_TYPE_TAG} symbols,
+      *   <li>the index of the {@link Label} (in the {@link SymbolTable#labelTable} table) of the NEW
+      *       instruction that created an {@link Frame#ITEM_UNINITIALIZED} type for {@link
+      *       #FORWARD_UNINITIALIZED_TYPE_TAG} symbols,
+      *   <li>the indices (in the class' type table) of two {@link #TYPE_TAG} source types for {@link
+      *       #MERGED_TYPE_TAG} symbols,
+      *   <li>0 for the other types of symbol.
+      * </ul>
+      */
+    final long data;
+
+    /**
+      * Additional information about this symbol, generally computed lazily. <i>Warning: the value of
+      * this field is ignored when comparing Symbol instances</i> (to avoid duplicate entries in a
+      * SymbolTable). Therefore, this field should only contain data that can be computed from the
+      * other fields of this class. It contains:
+      *
+      * <ul>
+      *   <li>the {@link Type#getArgumentsAndReturnSizes} of the symbol's method descriptor for {@link
+      *       #CONSTANT_METHODREF_TAG}, {@link #CONSTANT_INTERFACE_METHODREF_TAG} and {@link
+      *       #CONSTANT_INVOKE_DYNAMIC_TAG} symbols,
+      *   <li>the index in the InnerClasses_attribute 'classes' array (plus one) corresponding to this
+      *       class, for {@link #CONSTANT_CLASS_TAG} symbols,
+      *   <li>the index (in the class' type table) of the merged type of the two source types for
+      *       {@link #MERGED_TYPE_TAG} symbols,
+      *   <li>0 for the other types of symbol, or if this field has not been computed yet.
+      * </ul>
+      */
+    int info;
+
+    /**
+      * Constructs a new Symbol. This constructor can't be used directly because the Symbol class is
+      * abstract. Instead, use the factory methods of the {@link SymbolTable} class.
+      *
+      * @param index the symbol index in the constant pool, in the BootstrapMethods attribute, or in
+      *     the (ASM specific) type table of a class (depending on 'tag').
+      * @param tag the symbol type. Must be one of the static tag values defined in this class.
+      * @param owner The internal name of the symbol's owner class. Maybe {@literal null}.
+      * @param name The name of the symbol's corresponding class field or method. Maybe {@literal
+      *     null}.
+      * @param value The string value of this symbol. Maybe {@literal null}.
+      * @param data The numeric value of this symbol.
+      */
+    Symbol(
+            final int index,
+            final int tag,
+            final String owner,
+            final String name,
+            final String value,
+            final long data) {
+        this.index = index;
+        this.tag = tag;
+        this.owner = owner;
+        this.name = name;
+        this.value = value;
+        this.data = data;
+    }
+
+    /**
+      * Returns the result {@link Type#getArgumentsAndReturnSizes} on {@link #value}.
+      *
+      * @return the result {@link Type#getArgumentsAndReturnSizes} on {@link #value} (memoized in
+      *     {@link #info} for efficiency). This should only be used for {@link
+      *     #CONSTANT_METHODREF_TAG}, {@link #CONSTANT_INTERFACE_METHODREF_TAG} and {@link
+      *     #CONSTANT_INVOKE_DYNAMIC_TAG} symbols.
+      */
+    int getArgumentsAndReturnSizes() {
+        if (info == 0) {
+            info = Type.getArgumentsAndReturnSizes(value);
+        }
+        return info;
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/org/objectweb/asm/SymbolTable$Entry.class b/tests/test_data/std/jdk/internal/org/objectweb/asm/SymbolTable$Entry.class
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/org/objectweb/asm/SymbolTable.java b/tests/test_data/std/jdk/internal/org/objectweb/asm/SymbolTable.java
new file mode 100644
index 00000000..5fc629d6
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/org/objectweb/asm/SymbolTable.java
@@ -0,0 +1,1495 @@
+/*
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/*
+ * This file is available under and governed by the GNU General Public
+ * License version 2 only, as published by the Free Software Foundation.
+ * However, the following notice accompanied the original version of this
+ * file:
+ *
+ * ASM: a very small and fast Java bytecode manipulation framework
+ * Copyright (c) 2000-2011 INRIA, France Telecom
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the copyright holders nor the names of its
+ *    contributors may be used to endorse or promote products derived from
+ *    this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+package jdk.internal.org.objectweb.asm;
+
+/**
+ * The constant pool entries, the BootstrapMethods attribute entries and the (ASM specific) type
+ * table entries of a class.
+ *
+ * @author Eric Bruneton
+ * @see <a href="https://docs.oracle.com/javase/specs/jvms/se9/html/jvms-4.html#jvms-4.4">JVMS
+ *     4.4</a>
+ * @see <a href="https://docs.oracle.com/javase/specs/jvms/se9/html/jvms-4.html#jvms-4.7.23">JVMS
+ *     4.7.23</a>
+ */
+final class SymbolTable {
+
+    /**
+      * The ClassWriter to which this SymbolTable belongs. This is only used to get access to {@link
+      * ClassWriter#getCommonSuperClass} and to serialize custom attributes with {@link
+      * Attribute#write}.
+      */
+    final ClassWriter classWriter;
+
+    /**
+      * The ClassReader from which this SymbolTable was constructed, or {@literal null} if it was
+      * constructed from scratch.
+      */
+    private final ClassReader sourceClassReader;
+
+    /** The major version number of the class to which this symbol table belongs. */
+    private int majorVersion;
+
+    /** The internal name of the class to which this symbol table belongs. */
+    private String className;
+
+    /**
+      * The total number of {@link Entry} instances in {@link #entries}. This includes entries that are
+      * accessible (recursively) via {@link Entry#next}.
+      */
+    private int entryCount;
+
+    /**
+      * A hash set of all the entries in this SymbolTable (this includes the constant pool entries, the
+      * bootstrap method entries and the type table entries). Each {@link Entry} instance is stored at
+      * the array index given by its hash code modulo the array size. If several entries must be stored
+      * at the same array index, they are linked together via their {@link Entry#next} field. The
+      * factory methods of this class make sure that this table does not contain duplicated entries.
+      */
+    private Entry[] entries;
+
+    /**
+      * The number of constant pool items in {@link #constantPool}, plus 1. The first constant pool
+      * item has index 1, and long and double items count for two items.
+      */
+    private int constantPoolCount;
+
+    /**
+      * The content of the ClassFile's constant_pool JVMS structure corresponding to this SymbolTable.
+      * The ClassFile's constant_pool_count field is <i>not</i> included.
+      */
+    private ByteVector constantPool;
+
+    /**
+      * The number of bootstrap methods in {@link #bootstrapMethods}. Corresponds to the
+      * BootstrapMethods_attribute's num_bootstrap_methods field value.
+      */
+    private int bootstrapMethodCount;
+
+    /**
+      * The content of the BootstrapMethods attribute 'bootstrap_methods' array corresponding to this
+      * SymbolTable. Note that the first 6 bytes of the BootstrapMethods_attribute, and its
+      * num_bootstrap_methods field, are <i>not</i> included.
+      */
+    private ByteVector bootstrapMethods;
+
+    /**
+      * The actual number of elements in {@link #typeTable}. These elements are stored from index 0 to
+      * typeCount (excluded). The other array entries are empty.
+      */
+    private int typeCount;
+
+    /**
+      * An ASM specific type table used to temporarily store internal names that will not necessarily
+      * be stored in the constant pool. This type table is used by the control flow and data flow
+      * analysis algorithm used to compute stack map frames from scratch. This array stores {@link
+      * Symbol#TYPE_TAG}, {@link Symbol#UNINITIALIZED_TYPE_TAG},{@link
+      * Symbol#FORWARD_UNINITIALIZED_TYPE_TAG} and {@link Symbol#MERGED_TYPE_TAG} entries. The type
+      * symbol at index {@code i} has its {@link Symbol#index} equal to {@code i} (and vice versa).
+      */
+    private Entry[] typeTable;
+
+    /**
+      * The actual number of {@link LabelEntry} in {@link #labelTable}. These elements are stored from
+      * index 0 to labelCount (excluded). The other array entries are empty. These label entries are
+      * also stored in the {@link #labelEntries} hash set.
+      */
+    private int labelCount;
+
+    /**
+      * The labels corresponding to the "forward uninitialized" types in the ASM specific {@link
+      * typeTable} (see {@link Symbol#FORWARD_UNINITIALIZED_TYPE_TAG}). The label entry at index {@code
+      * i} has its {@link LabelEntry#index} equal to {@code i} (and vice versa).
+      */
+    private LabelEntry[] labelTable;
+
+    /**
+      * A hash set of all the {@link LabelEntry} elements in the {@link #labelTable}. Each {@link
+      * LabelEntry} instance is stored at the array index given by its hash code modulo the array size.
+      * If several entries must be stored at the same array index, they are linked together via their
+      * {@link LabelEntry#next} field. The {@link #getOrAddLabelEntry(Label)} method ensures that this
+      * table does not contain duplicated entries.
+      */
+    private LabelEntry[] labelEntries;
+
+    /**
+      * Constructs a new, empty SymbolTable for the given ClassWriter.
+      *
+      * @param classWriter a ClassWriter.
+      */
+    SymbolTable(final ClassWriter classWriter) {
+        this.classWriter = classWriter;
+        this.sourceClassReader = null;
+        this.entries = new Entry[256];
+        this.constantPoolCount = 1;
+        this.constantPool = new ByteVector();
+    }
+
+    /**
+      * Constructs a new SymbolTable for the given ClassWriter, initialized with the constant pool and
+      * bootstrap methods of the given ClassReader.
+      *
+      * @param classWriter a ClassWriter.
+      * @param classReader the ClassReader whose constant pool and bootstrap methods must be copied to
+      *     initialize the SymbolTable.
+      */
+    SymbolTable(final ClassWriter classWriter, final ClassReader classReader) {
+        this.classWriter = classWriter;
+        this.sourceClassReader = classReader;
+
+        // Copy the constant pool binary content.
+        byte[] inputBytes = classReader.classFileBuffer;
+        int constantPoolOffset = classReader.getItem(1) - 1;
+        int constantPoolLength = classReader.header - constantPoolOffset;
+        constantPoolCount = classReader.getItemCount();
+        constantPool = new ByteVector(constantPoolLength);
+        constantPool.putByteArray(inputBytes, constantPoolOffset, constantPoolLength);
+
+        // Add the constant pool items in the symbol table entries. Reserve enough space in 'entries' to
+        // avoid too many hash set collisions (entries is not dynamically resized by the addConstant*
+        // method calls below), and to account for bootstrap method entries.
+        entries = new Entry[constantPoolCount * 2];
+        char[] charBuffer = new char[classReader.getMaxStringLength()];
+        boolean hasBootstrapMethods = false;
+        int itemIndex = 1;
+        while (itemIndex < constantPoolCount) {
+            int itemOffset = classReader.getItem(itemIndex);
+            int itemTag = inputBytes[itemOffset - 1];
+            int nameAndTypeItemOffset;
+            switch (itemTag) {
+                case Symbol.CONSTANT_FIELDREF_TAG:
+                case Symbol.CONSTANT_METHODREF_TAG:
+                case Symbol.CONSTANT_INTERFACE_METHODREF_TAG:
+                    nameAndTypeItemOffset =
+                            classReader.getItem(classReader.readUnsignedShort(itemOffset + 2));
+                    addConstantMemberReference(
+                            itemIndex,
+                            itemTag,
+                            classReader.readClass(itemOffset, charBuffer),
+                            classReader.readUTF8(nameAndTypeItemOffset, charBuffer),
+                            classReader.readUTF8(nameAndTypeItemOffset + 2, charBuffer));
+                    break;
+                case Symbol.CONSTANT_INTEGER_TAG:
+                case Symbol.CONSTANT_FLOAT_TAG:
+                    addConstantIntegerOrFloat(itemIndex, itemTag, classReader.readInt(itemOffset));
+                    break;
+                case Symbol.CONSTANT_NAME_AND_TYPE_TAG:
+                    addConstantNameAndType(
+                            itemIndex,
+                            classReader.readUTF8(itemOffset, charBuffer),
+                            classReader.readUTF8(itemOffset + 2, charBuffer));
+                    break;
+                case Symbol.CONSTANT_LONG_TAG:
+                case Symbol.CONSTANT_DOUBLE_TAG:
+                    addConstantLongOrDouble(itemIndex, itemTag, classReader.readLong(itemOffset));
+                    break;
+                case Symbol.CONSTANT_UTF8_TAG:
+                    addConstantUtf8(itemIndex, classReader.readUtf(itemIndex, charBuffer));
+                    break;
+                case Symbol.CONSTANT_METHOD_HANDLE_TAG:
+                    int memberRefItemOffset =
+                            classReader.getItem(classReader.readUnsignedShort(itemOffset + 1));
+                    nameAndTypeItemOffset =
+                            classReader.getItem(classReader.readUnsignedShort(memberRefItemOffset + 2));
+                    addConstantMethodHandle(
+                            itemIndex,
+                            classReader.readByte(itemOffset),
+                            classReader.readClass(memberRefItemOffset, charBuffer),
+                            classReader.readUTF8(nameAndTypeItemOffset, charBuffer),
+                            classReader.readUTF8(nameAndTypeItemOffset + 2, charBuffer));
+                    break;
+                case Symbol.CONSTANT_DYNAMIC_TAG:
+                case Symbol.CONSTANT_INVOKE_DYNAMIC_TAG:
+                    hasBootstrapMethods = true;
+                    nameAndTypeItemOffset =
+                            classReader.getItem(classReader.readUnsignedShort(itemOffset + 2));
+                    addConstantDynamicOrInvokeDynamicReference(
+                            itemTag,
+                            itemIndex,
+                            classReader.readUTF8(nameAndTypeItemOffset, charBuffer),
+                            classReader.readUTF8(nameAndTypeItemOffset + 2, charBuffer),
+                            classReader.readUnsignedShort(itemOffset));
+                    break;
+                case Symbol.CONSTANT_STRING_TAG:
+                case Symbol.CONSTANT_CLASS_TAG:
+                case Symbol.CONSTANT_METHOD_TYPE_TAG:
+                case Symbol.CONSTANT_MODULE_TAG:
+                case Symbol.CONSTANT_PACKAGE_TAG:
+                    addConstantUtf8Reference(
+                            itemIndex, itemTag, classReader.readUTF8(itemOffset, charBuffer));
+                    break;
+                default:
+                    throw new IllegalArgumentException();
+            }
+            itemIndex +=
+                    (itemTag == Symbol.CONSTANT_LONG_TAG || itemTag == Symbol.CONSTANT_DOUBLE_TAG) ? 2 : 1;
+        }
+
+        // Copy the BootstrapMethods, if any.
+        if (hasBootstrapMethods) {
+            copyBootstrapMethods(classReader, charBuffer);
+        }
+    }
+
+    /**
+      * Read the BootstrapMethods 'bootstrap_methods' array binary content and add them as entries of
+      * the SymbolTable.
+      *
+      * @param classReader the ClassReader whose bootstrap methods must be copied to initialize the
+      *     SymbolTable.
+      * @param charBuffer a buffer used to read strings in the constant pool.
+      */
+    private void copyBootstrapMethods(final ClassReader classReader, final char[] charBuffer) {
+        // Find attributOffset of the 'bootstrap_methods' array.
+        byte[] inputBytes = classReader.classFileBuffer;
+        int currentAttributeOffset = classReader.getFirstAttributeOffset();
+        for (int i = classReader.readUnsignedShort(currentAttributeOffset - 2); i > 0; --i) {
+            String attributeName = classReader.readUTF8(currentAttributeOffset, charBuffer);
+            if (Constants.BOOTSTRAP_METHODS.equals(attributeName)) {
+                bootstrapMethodCount = classReader.readUnsignedShort(currentAttributeOffset + 6);
+                break;
+            }
+            currentAttributeOffset += 6 + classReader.readInt(currentAttributeOffset + 2);
+        }
+        if (bootstrapMethodCount > 0) {
+            // Compute the offset and the length of the BootstrapMethods 'bootstrap_methods' array.
+            int bootstrapMethodsOffset = currentAttributeOffset + 8;
+            int bootstrapMethodsLength = classReader.readInt(currentAttributeOffset + 2) - 2;
+            bootstrapMethods = new ByteVector(bootstrapMethodsLength);
+            bootstrapMethods.putByteArray(inputBytes, bootstrapMethodsOffset, bootstrapMethodsLength);
+
+            // Add each bootstrap method in the symbol table entries.
+            int currentOffset = bootstrapMethodsOffset;
+            for (int i = 0; i < bootstrapMethodCount; i++) {
+                int offset = currentOffset - bootstrapMethodsOffset;
+                int bootstrapMethodRef = classReader.readUnsignedShort(currentOffset);
+                currentOffset += 2;
+                int numBootstrapArguments = classReader.readUnsignedShort(currentOffset);
+                currentOffset += 2;
+                int hashCode = classReader.readConst(bootstrapMethodRef, charBuffer).hashCode();
+                while (numBootstrapArguments-- > 0) {
+                    int bootstrapArgument = classReader.readUnsignedShort(currentOffset);
+                    currentOffset += 2;
+                    hashCode ^= classReader.readConst(bootstrapArgument, charBuffer).hashCode();
+                }
+                add(new Entry(i, Symbol.BOOTSTRAP_METHOD_TAG, offset, hashCode & 0x7FFFFFFF));
+            }
+        }
+    }
+
+    /**
+      * Returns the ClassReader from which this SymbolTable was constructed.
+      *
+      * @return the ClassReader from which this SymbolTable was constructed, or {@literal null} if it
+      *     was constructed from scratch.
+      */
+    ClassReader getSource() {
+        return sourceClassReader;
+    }
+
+    /**
+      * Returns the major version of the class to which this symbol table belongs.
+      *
+      * @return the major version of the class to which this symbol table belongs.
+      */
+    int getMajorVersion() {
+        return majorVersion;
+    }
+
+    /**
+      * Returns the internal name of the class to which this symbol table belongs.
+      *
+      * @return the internal name of the class to which this symbol table belongs.
+      */
+    String getClassName() {
+        return className;
+    }
+
+    /**
+      * Sets the major version and the name of the class to which this symbol table belongs. Also adds
+      * the class name to the constant pool.
+      *
+      * @param majorVersion a major ClassFile version number.
+      * @param className an internal class name.
+      * @return the constant pool index of a new or already existing Symbol with the given class name.
+      */
+    int setMajorVersionAndClassName(final int majorVersion, final String className) {
+        this.majorVersion = majorVersion;
+        this.className = className;
+        return addConstantClass(className).index;
+    }
+
+    /**
+      * Returns the number of items in this symbol table's constant_pool array (plus 1).
+      *
+      * @return the number of items in this symbol table's constant_pool array (plus 1).
+      */
+    int getConstantPoolCount() {
+        return constantPoolCount;
+    }
+
+    /**
+      * Returns the length in bytes of this symbol table's constant_pool array.
+      *
+      * @return the length in bytes of this symbol table's constant_pool array.
+      */
+    int getConstantPoolLength() {
+        return constantPool.length;
+    }
+
+    /**
+      * Puts this symbol table's constant_pool array in the given ByteVector, preceded by the
+      * constant_pool_count value.
+      *
+      * @param output where the JVMS ClassFile's constant_pool array must be put.
+      */
+    void putConstantPool(final ByteVector output) {
+        output.putShort(constantPoolCount).putByteArray(constantPool.data, 0, constantPool.length);
+    }
+
+    /**
+      * Returns the size in bytes of this symbol table's BootstrapMethods attribute. Also adds the
+      * attribute name in the constant pool.
+      *
+      * @return the size in bytes of this symbol table's BootstrapMethods attribute.
+      */
+    int computeBootstrapMethodsSize() {
+        if (bootstrapMethods != null) {
+            addConstantUtf8(Constants.BOOTSTRAP_METHODS);
+            return 8 + bootstrapMethods.length;
+        } else {
+            return 0;
+        }
+    }
+
+    /**
+      * Puts this symbol table's BootstrapMethods attribute in the given ByteVector. This includes the
+      * 6 attribute header bytes and the num_bootstrap_methods value.
+      *
+      * @param output where the JVMS BootstrapMethods attribute must be put.
+      */
+    void putBootstrapMethods(final ByteVector output) {
+        if (bootstrapMethods != null) {
+            output
+                    .putShort(addConstantUtf8(Constants.BOOTSTRAP_METHODS))
+                    .putInt(bootstrapMethods.length + 2)
+                    .putShort(bootstrapMethodCount)
+                    .putByteArray(bootstrapMethods.data, 0, bootstrapMethods.length);
+        }
+    }
+
+    // -----------------------------------------------------------------------------------------------
+    // Generic symbol table entries management.
+    // -----------------------------------------------------------------------------------------------
+
+    /**
+      * Returns the list of entries which can potentially have the given hash code.
+      *
+      * @param hashCode a {@link Entry#hashCode} value.
+      * @return the list of entries which can potentially have the given hash code. The list is stored
+      *     via the {@link Entry#next} field.
+      */
+    private Entry get(final int hashCode) {
+        return entries[hashCode % entries.length];
+    }
+
+    /**
+      * Puts the given entry in the {@link #entries} hash set. This method does <i>not</i> check
+      * whether {@link #entries} already contains a similar entry or not. {@link #entries} is resized
+      * if necessary to avoid hash collisions (multiple entries needing to be stored at the same {@link
+      * #entries} array index) as much as possible, with reasonable memory usage.
+      *
+      * @param entry an Entry (which must not already be contained in {@link #entries}).
+      * @return the given entry
+      */
+    private Entry put(final Entry entry) {
+        if (entryCount > (entries.length * 3) / 4) {
+            int currentCapacity = entries.length;
+            int newCapacity = currentCapacity * 2 + 1;
+            Entry[] newEntries = new Entry[newCapacity];
+            for (int i = currentCapacity - 1; i >= 0; --i) {
+                Entry currentEntry = entries[i];
+                while (currentEntry != null) {
+                    int newCurrentEntryIndex = currentEntry.hashCode % newCapacity;
+                    Entry nextEntry = currentEntry.next;
+                    currentEntry.next = newEntries[newCurrentEntryIndex];
+                    newEntries[newCurrentEntryIndex] = currentEntry;
+                    currentEntry = nextEntry;
+                }
+            }
+            entries = newEntries;
+        }
+        entryCount++;
+        int index = entry.hashCode % entries.length;
+        entry.next = entries[index];
+        return entries[index] = entry;
+    }
+
+    /**
+      * Adds the given entry in the {@link #entries} hash set. This method does <i>not</i> check
+      * whether {@link #entries} already contains a similar entry or not, and does <i>not</i> resize
+      * {@link #entries} if necessary.
+      *
+      * @param entry an Entry (which must not already be contained in {@link #entries}).
+      */
+    private void add(final Entry entry) {
+        entryCount++;
+        int index = entry.hashCode % entries.length;
+        entry.next = entries[index];
+        entries[index] = entry;
+    }
+
+    // -----------------------------------------------------------------------------------------------
+    // Constant pool entries management.
+    // -----------------------------------------------------------------------------------------------
+
+    /**
+      * Adds a number or string constant to the constant pool of this symbol table. Does nothing if the
+      * constant pool already contains a similar item.
+      *
+      * @param value the value of the constant to be added to the constant pool. This parameter must be
+      *     an {@link Integer}, {@link Byte}, {@link Character}, {@link Short}, {@link Boolean}, {@link
+      *     Float}, {@link Long}, {@link Double}, {@link String}, {@link Type} or {@link Handle}.
+      * @return a new or already existing Symbol with the given value.
+      */
+    Symbol addConstant(final Object value) {
+        if (value instanceof Integer) {
+            return addConstantInteger(((Integer) value).intValue());
+        } else if (value instanceof Byte) {
+            return addConstantInteger(((Byte) value).intValue());
+        } else if (value instanceof Character) {
+            return addConstantInteger(((Character) value).charValue());
+        } else if (value instanceof Short) {
+            return addConstantInteger(((Short) value).intValue());
+        } else if (value instanceof Boolean) {
+            return addConstantInteger(((Boolean) value).booleanValue() ? 1 : 0);
+        } else if (value instanceof Float) {
+            return addConstantFloat(((Float) value).floatValue());
+        } else if (value instanceof Long) {
+            return addConstantLong(((Long) value).longValue());
+        } else if (value instanceof Double) {
+            return addConstantDouble(((Double) value).doubleValue());
+        } else if (value instanceof String) {
+            return addConstantString((String) value);
+        } else if (value instanceof Type) {
+            Type type = (Type) value;
+            int typeSort = type.getSort();
+            if (typeSort == Type.OBJECT) {
+                return addConstantClass(type.getInternalName());
+            } else if (typeSort == Type.METHOD) {
+                return addConstantMethodType(type.getDescriptor());
+            } else { // type is a primitive or array type.
+                return addConstantClass(type.getDescriptor());
+            }
+        } else if (value instanceof Handle) {
+            Handle handle = (Handle) value;
+            return addConstantMethodHandle(
+                    handle.getTag(),
+                    handle.getOwner(),
+                    handle.getName(),
+                    handle.getDesc(),
+                    handle.isInterface());
+        } else if (value instanceof ConstantDynamic) {
+            ConstantDynamic constantDynamic = (ConstantDynamic) value;
+            return addConstantDynamic(
+                    constantDynamic.getName(),
+                    constantDynamic.getDescriptor(),
+                    constantDynamic.getBootstrapMethod(),
+                    constantDynamic.getBootstrapMethodArgumentsUnsafe());
+        } else {
+            throw new IllegalArgumentException("value " + value);
+        }
+    }
+
+    /**
+      * Adds a CONSTANT_Class_info to the constant pool of this symbol table. Does nothing if the
+      * constant pool already contains a similar item.
+      *
+      * @param value the internal name of a class.
+      * @return a new or already existing Symbol with the given value.
+      */
+    Symbol addConstantClass(final String value) {
+        return addConstantUtf8Reference(Symbol.CONSTANT_CLASS_TAG, value);
+    }
+
+    /**
+      * Adds a CONSTANT_Fieldref_info to the constant pool of this symbol table. Does nothing if the
+      * constant pool already contains a similar item.
+      *
+      * @param owner the internal name of a class.
+      * @param name a field name.
+      * @param descriptor a field descriptor.
+      * @return a new or already existing Symbol with the given value.
+      */
+    Symbol addConstantFieldref(final String owner, final String name, final String descriptor) {
+        return addConstantMemberReference(Symbol.CONSTANT_FIELDREF_TAG, owner, name, descriptor);
+    }
+
+    /**
+      * Adds a CONSTANT_Methodref_info or CONSTANT_InterfaceMethodref_info to the constant pool of this
+      * symbol table. Does nothing if the constant pool already contains a similar item.
+      *
+      * @param owner the internal name of a class.
+      * @param name a method name.
+      * @param descriptor a method descriptor.
+      * @param isInterface whether owner is an interface or not.
+      * @return a new or already existing Symbol with the given value.
+      */
+    Symbol addConstantMethodref(
+            final String owner, final String name, final String descriptor, final boolean isInterface) {
+        int tag = isInterface ? Symbol.CONSTANT_INTERFACE_METHODREF_TAG : Symbol.CONSTANT_METHODREF_TAG;
+        return addConstantMemberReference(tag, owner, name, descriptor);
+    }
+
+    /**
+      * Adds a CONSTANT_Fieldref_info, CONSTANT_Methodref_info or CONSTANT_InterfaceMethodref_info to
+      * the constant pool of this symbol table. Does nothing if the constant pool already contains a
+      * similar item.
+      *
+      * @param tag one of {@link Symbol#CONSTANT_FIELDREF_TAG}, {@link Symbol#CONSTANT_METHODREF_TAG}
+      *     or {@link Symbol#CONSTANT_INTERFACE_METHODREF_TAG}.
+      * @param owner the internal name of a class.
+      * @param name a field or method name.
+      * @param descriptor a field or method descriptor.
+      * @return a new or already existing Symbol with the given value.
+      */
+    private Entry addConstantMemberReference(
+            final int tag, final String owner, final String name, final String descriptor) {
+        int hashCode = hash(tag, owner, name, descriptor);
+        Entry entry = get(hashCode);
+        while (entry != null) {
+            if (entry.tag == tag
+                    && entry.hashCode == hashCode
+                    && entry.owner.equals(owner)
+                    && entry.name.equals(name)
+                    && entry.value.equals(descriptor)) {
+                return entry;
+            }
+            entry = entry.next;
+        }
+        constantPool.put122(
+                tag, addConstantClass(owner).index, addConstantNameAndType(name, descriptor));
+        return put(new Entry(constantPoolCount++, tag, owner, name, descriptor, 0, hashCode));
+    }
+
+    /**
+      * Adds a new CONSTANT_Fieldref_info, CONSTANT_Methodref_info or CONSTANT_InterfaceMethodref_info
+      * to the constant pool of this symbol table.
+      *
+      * @param index the constant pool index of the new Symbol.
+      * @param tag one of {@link Symbol#CONSTANT_FIELDREF_TAG}, {@link Symbol#CONSTANT_METHODREF_TAG}
+      *     or {@link Symbol#CONSTANT_INTERFACE_METHODREF_TAG}.
+      * @param owner the internal name of a class.
+      * @param name a field or method name.
+      * @param descriptor a field or method descriptor.
+      */
+    private void addConstantMemberReference(
+            final int index,
+            final int tag,
+            final String owner,
+            final String name,
+            final String descriptor) {
+        add(new Entry(index, tag, owner, name, descriptor, 0, hash(tag, owner, name, descriptor)));
+    }
+
+    /**
+      * Adds a CONSTANT_String_info to the constant pool of this symbol table. Does nothing if the
+      * constant pool already contains a similar item.
+      *
+      * @param value a string.
+      * @return a new or already existing Symbol with the given value.
+      */
+    Symbol addConstantString(final String value) {
+        return addConstantUtf8Reference(Symbol.CONSTANT_STRING_TAG, value);
+    }
+
+    /**
+      * Adds a CONSTANT_Integer_info to the constant pool of this symbol table. Does nothing if the
+      * constant pool already contains a similar item.
+      *
+      * @param value an int.
+      * @return a new or already existing Symbol with the given value.
+      */
+    Symbol addConstantInteger(final int value) {
+        return addConstantIntegerOrFloat(Symbol.CONSTANT_INTEGER_TAG, value);
+    }
+
+    /**
+      * Adds a CONSTANT_Float_info to the constant pool of this symbol table. Does nothing if the
+      * constant pool already contains a similar item.
+      *
+      * @param value a float.
+      * @return a new or already existing Symbol with the given value.
+      */
+    Symbol addConstantFloat(final float value) {
+        return addConstantIntegerOrFloat(Symbol.CONSTANT_FLOAT_TAG, Float.floatToRawIntBits(value));
+    }
+
+    /**
+      * Adds a CONSTANT_Integer_info or CONSTANT_Float_info to the constant pool of this symbol table.
+      * Does nothing if the constant pool already contains a similar item.
+      *
+      * @param tag one of {@link Symbol#CONSTANT_INTEGER_TAG} or {@link Symbol#CONSTANT_FLOAT_TAG}.
+      * @param value an int or float.
+      * @return a constant pool constant with the given tag and primitive values.
+      */
+    private Symbol addConstantIntegerOrFloat(final int tag, final int value) {
+        int hashCode = hash(tag, value);
+        Entry entry = get(hashCode);
+        while (entry != null) {
+            if (entry.tag == tag && entry.hashCode == hashCode && entry.data == value) {
+                return entry;
+            }
+            entry = entry.next;
+        }
+        constantPool.putByte(tag).putInt(value);
+        return put(new Entry(constantPoolCount++, tag, value, hashCode));
+    }
+
+    /**
+      * Adds a new CONSTANT_Integer_info or CONSTANT_Float_info to the constant pool of this symbol
+      * table.
+      *
+      * @param index the constant pool index of the new Symbol.
+      * @param tag one of {@link Symbol#CONSTANT_INTEGER_TAG} or {@link Symbol#CONSTANT_FLOAT_TAG}.
+      * @param value an int or float.
+      */
+    private void addConstantIntegerOrFloat(final int index, final int tag, final int value) {
+        add(new Entry(index, tag, value, hash(tag, value)));
+    }
+
+    /**
+      * Adds a CONSTANT_Long_info to the constant pool of this symbol table. Does nothing if the
+      * constant pool already contains a similar item.
+      *
+      * @param value a long.
+      * @return a new or already existing Symbol with the given value.
+      */
+    Symbol addConstantLong(final long value) {
+        return addConstantLongOrDouble(Symbol.CONSTANT_LONG_TAG, value);
+    }
+
+    /**
+      * Adds a CONSTANT_Double_info to the constant pool of this symbol table. Does nothing if the
+      * constant pool already contains a similar item.
+      *
+      * @param value a double.
+      * @return a new or already existing Symbol with the given value.
+      */
+    Symbol addConstantDouble(final double value) {
+        return addConstantLongOrDouble(Symbol.CONSTANT_DOUBLE_TAG, Double.doubleToRawLongBits(value));
+    }
+
+    /**
+      * Adds a CONSTANT_Long_info or CONSTANT_Double_info to the constant pool of this symbol table.
+      * Does nothing if the constant pool already contains a similar item.
+      *
+      * @param tag one of {@link Symbol#CONSTANT_LONG_TAG} or {@link Symbol#CONSTANT_DOUBLE_TAG}.
+      * @param value a long or double.
+      * @return a constant pool constant with the given tag and primitive values.
+      */
+    private Symbol addConstantLongOrDouble(final int tag, final long value) {
+        int hashCode = hash(tag, value);
+        Entry entry = get(hashCode);
+        while (entry != null) {
+            if (entry.tag == tag && entry.hashCode == hashCode && entry.data == value) {
+                return entry;
+            }
+            entry = entry.next;
+        }
+        int index = constantPoolCount;
+        constantPool.putByte(tag).putLong(value);
+        constantPoolCount += 2;
+        return put(new Entry(index, tag, value, hashCode));
+    }
+
+    /**
+      * Adds a new CONSTANT_Long_info or CONSTANT_Double_info to the constant pool of this symbol
+      * table.
+      *
+      * @param index the constant pool index of the new Symbol.
+      * @param tag one of {@link Symbol#CONSTANT_LONG_TAG} or {@link Symbol#CONSTANT_DOUBLE_TAG}.
+      * @param value a long or double.
+      */
+    private void addConstantLongOrDouble(final int index, final int tag, final long value) {
+        add(new Entry(index, tag, value, hash(tag, value)));
+    }
+
+    /**
+      * Adds a CONSTANT_NameAndType_info to the constant pool of this symbol table. Does nothing if the
+      * constant pool already contains a similar item.
+      *
+      * @param name a field or method name.
+      * @param descriptor a field or method descriptor.
+      * @return a new or already existing Symbol with the given value.
+      */
+    int addConstantNameAndType(final String name, final String descriptor) {
+        final int tag = Symbol.CONSTANT_NAME_AND_TYPE_TAG;
+        int hashCode = hash(tag, name, descriptor);
+        Entry entry = get(hashCode);
+        while (entry != null) {
+            if (entry.tag == tag
+                    && entry.hashCode == hashCode
+                    && entry.name.equals(name)
+                    && entry.value.equals(descriptor)) {
+                return entry.index;
+            }
+            entry = entry.next;
+        }
+        constantPool.put122(tag, addConstantUtf8(name), addConstantUtf8(descriptor));
+        return put(new Entry(constantPoolCount++, tag, name, descriptor, hashCode)).index;
+    }
+
+    /**
+      * Adds a new CONSTANT_NameAndType_info to the constant pool of this symbol table.
+      *
+      * @param index the constant pool index of the new Symbol.
+      * @param name a field or method name.
+      * @param descriptor a field or method descriptor.
+      */
+    private void addConstantNameAndType(final int index, final String name, final String descriptor) {
+        final int tag = Symbol.CONSTANT_NAME_AND_TYPE_TAG;
+        add(new Entry(index, tag, name, descriptor, hash(tag, name, descriptor)));
+    }
+
+    /**
+      * Adds a CONSTANT_Utf8_info to the constant pool of this symbol table. Does nothing if the
+      * constant pool already contains a similar item.
+      *
+      * @param value a string.
+      * @return a new or already existing Symbol with the given value.
+      */
+    int addConstantUtf8(final String value) {
+        int hashCode = hash(Symbol.CONSTANT_UTF8_TAG, value);
+        Entry entry = get(hashCode);
+        while (entry != null) {
+            if (entry.tag == Symbol.CONSTANT_UTF8_TAG
+                    && entry.hashCode == hashCode
+                    && entry.value.equals(value)) {
+                return entry.index;
+            }
+            entry = entry.next;
+        }
+        constantPool.putByte(Symbol.CONSTANT_UTF8_TAG).putUTF8(value);
+        return put(new Entry(constantPoolCount++, Symbol.CONSTANT_UTF8_TAG, value, hashCode)).index;
+    }
+
+    /**
+      * Adds a new CONSTANT_String_info to the constant pool of this symbol table.
+      *
+      * @param index the constant pool index of the new Symbol.
+      * @param value a string.
+      */
+    private void addConstantUtf8(final int index, final String value) {
+        add(new Entry(index, Symbol.CONSTANT_UTF8_TAG, value, hash(Symbol.CONSTANT_UTF8_TAG, value)));
+    }
+
+    /**
+      * Adds a CONSTANT_MethodHandle_info to the constant pool of this symbol table. Does nothing if
+      * the constant pool already contains a similar item.
+      *
+      * @param referenceKind one of {@link Opcodes#H_GETFIELD}, {@link Opcodes#H_GETSTATIC}, {@link
+      *     Opcodes#H_PUTFIELD}, {@link Opcodes#H_PUTSTATIC}, {@link Opcodes#H_INVOKEVIRTUAL}, {@link
+      *     Opcodes#H_INVOKESTATIC}, {@link Opcodes#H_INVOKESPECIAL}, {@link
+      *     Opcodes#H_NEWINVOKESPECIAL} or {@link Opcodes#H_INVOKEINTERFACE}.
+      * @param owner the internal name of a class of interface.
+      * @param name a field or method name.
+      * @param descriptor a field or method descriptor.
+      * @param isInterface whether owner is an interface or not.
+      * @return a new or already existing Symbol with the given value.
+      */
+    Symbol addConstantMethodHandle(
+            final int referenceKind,
+            final String owner,
+            final String name,
+            final String descriptor,
+            final boolean isInterface) {
+        final int tag = Symbol.CONSTANT_METHOD_HANDLE_TAG;
+        // Note that we don't need to include isInterface in the hash computation, because it is
+        // redundant with owner (we can't have the same owner with different isInterface values).
+        int hashCode = hash(tag, owner, name, descriptor, referenceKind);
+        Entry entry = get(hashCode);
+        while (entry != null) {
+            if (entry.tag == tag
+                    && entry.hashCode == hashCode
+                    && entry.data == referenceKind
+                    && entry.owner.equals(owner)
+                    && entry.name.equals(name)
+                    && entry.value.equals(descriptor)) {
+                return entry;
+            }
+            entry = entry.next;
+        }
+        if (referenceKind <= Opcodes.H_PUTSTATIC) {
+            constantPool.put112(tag, referenceKind, addConstantFieldref(owner, name, descriptor).index);
+        } else {
+            constantPool.put112(
+                    tag, referenceKind, addConstantMethodref(owner, name, descriptor, isInterface).index);
+        }
+        return put(
+                new Entry(constantPoolCount++, tag, owner, name, descriptor, referenceKind, hashCode));
+    }
+
+    /**
+      * Adds a new CONSTANT_MethodHandle_info to the constant pool of this symbol table.
+      *
+      * @param index the constant pool index of the new Symbol.
+      * @param referenceKind one of {@link Opcodes#H_GETFIELD}, {@link Opcodes#H_GETSTATIC}, {@link
+      *     Opcodes#H_PUTFIELD}, {@link Opcodes#H_PUTSTATIC}, {@link Opcodes#H_INVOKEVIRTUAL}, {@link
+      *     Opcodes#H_INVOKESTATIC}, {@link Opcodes#H_INVOKESPECIAL}, {@link
+      *     Opcodes#H_NEWINVOKESPECIAL} or {@link Opcodes#H_INVOKEINTERFACE}.
+      * @param owner the internal name of a class of interface.
+      * @param name a field or method name.
+      * @param descriptor a field or method descriptor.
+      */
+    private void addConstantMethodHandle(
+            final int index,
+            final int referenceKind,
+            final String owner,
+            final String name,
+            final String descriptor) {
+        final int tag = Symbol.CONSTANT_METHOD_HANDLE_TAG;
+        int hashCode = hash(tag, owner, name, descriptor, referenceKind);
+        add(new Entry(index, tag, owner, name, descriptor, referenceKind, hashCode));
+    }
+
+    /**
+      * Adds a CONSTANT_MethodType_info to the constant pool of this symbol table. Does nothing if the
+      * constant pool already contains a similar item.
+      *
+      * @param methodDescriptor a method descriptor.
+      * @return a new or already existing Symbol with the given value.
+      */
+    Symbol addConstantMethodType(final String methodDescriptor) {
+        return addConstantUtf8Reference(Symbol.CONSTANT_METHOD_TYPE_TAG, methodDescriptor);
+    }
+
+    /**
+      * Adds a CONSTANT_Dynamic_info to the constant pool of this symbol table. Also adds the related
+      * bootstrap method to the BootstrapMethods of this symbol table. Does nothing if the constant
+      * pool already contains a similar item.
+      *
+      * @param name a method name.
+      * @param descriptor a field descriptor.
+      * @param bootstrapMethodHandle a bootstrap method handle.
+      * @param bootstrapMethodArguments the bootstrap method arguments.
+      * @return a new or already existing Symbol with the given value.
+      */
+    Symbol addConstantDynamic(
+            final String name,
+            final String descriptor,
+            final Handle bootstrapMethodHandle,
+            final Object... bootstrapMethodArguments) {
+        Symbol bootstrapMethod = addBootstrapMethod(bootstrapMethodHandle, bootstrapMethodArguments);
+        return addConstantDynamicOrInvokeDynamicReference(
+                Symbol.CONSTANT_DYNAMIC_TAG, name, descriptor, bootstrapMethod.index);
+    }
+
+    /**
+      * Adds a CONSTANT_InvokeDynamic_info to the constant pool of this symbol table. Also adds the
+      * related bootstrap method to the BootstrapMethods of this symbol table. Does nothing if the
+      * constant pool already contains a similar item.
+      *
+      * @param name a method name.
+      * @param descriptor a method descriptor.
+      * @param bootstrapMethodHandle a bootstrap method handle.
+      * @param bootstrapMethodArguments the bootstrap method arguments.
+      * @return a new or already existing Symbol with the given value.
+      */
+    Symbol addConstantInvokeDynamic(
+            final String name,
+            final String descriptor,
+            final Handle bootstrapMethodHandle,
+            final Object... bootstrapMethodArguments) {
+        Symbol bootstrapMethod = addBootstrapMethod(bootstrapMethodHandle, bootstrapMethodArguments);
+        return addConstantDynamicOrInvokeDynamicReference(
+                Symbol.CONSTANT_INVOKE_DYNAMIC_TAG, name, descriptor, bootstrapMethod.index);
+    }
+
+    /**
+      * Adds a CONSTANT_Dynamic or a CONSTANT_InvokeDynamic_info to the constant pool of this symbol
+      * table. Does nothing if the constant pool already contains a similar item.
+      *
+      * @param tag one of {@link Symbol#CONSTANT_DYNAMIC_TAG} or {@link
+      *     Symbol#CONSTANT_INVOKE_DYNAMIC_TAG}.
+      * @param name a method name.
+      * @param descriptor a field descriptor for CONSTANT_DYNAMIC_TAG) or a method descriptor for
+      *     CONSTANT_INVOKE_DYNAMIC_TAG.
+      * @param bootstrapMethodIndex the index of a bootstrap method in the BootstrapMethods attribute.
+      * @return a new or already existing Symbol with the given value.
+      */
+    private Symbol addConstantDynamicOrInvokeDynamicReference(
+            final int tag, final String name, final String descriptor, final int bootstrapMethodIndex) {
+        int hashCode = hash(tag, name, descriptor, bootstrapMethodIndex);
+        Entry entry = get(hashCode);
+        while (entry != null) {
+            if (entry.tag == tag
+                    && entry.hashCode == hashCode
+                    && entry.data == bootstrapMethodIndex
+                    && entry.name.equals(name)
+                    && entry.value.equals(descriptor)) {
+                return entry;
+            }
+            entry = entry.next;
+        }
+        constantPool.put122(tag, bootstrapMethodIndex, addConstantNameAndType(name, descriptor));
+        return put(
+                new Entry(
+                        constantPoolCount++, tag, null, name, descriptor, bootstrapMethodIndex, hashCode));
+    }
+
+    /**
+      * Adds a new CONSTANT_Dynamic_info or CONSTANT_InvokeDynamic_info to the constant pool of this
+      * symbol table.
+      *
+      * @param tag one of {@link Symbol#CONSTANT_DYNAMIC_TAG} or {@link
+      *     Symbol#CONSTANT_INVOKE_DYNAMIC_TAG}.
+      * @param index the constant pool index of the new Symbol.
+      * @param name a method name.
+      * @param descriptor a field descriptor for CONSTANT_DYNAMIC_TAG or a method descriptor for
+      *     CONSTANT_INVOKE_DYNAMIC_TAG.
+      * @param bootstrapMethodIndex the index of a bootstrap method in the BootstrapMethods attribute.
+      */
+    private void addConstantDynamicOrInvokeDynamicReference(
+            final int tag,
+            final int index,
+            final String name,
+            final String descriptor,
+            final int bootstrapMethodIndex) {
+        int hashCode = hash(tag, name, descriptor, bootstrapMethodIndex);
+        add(new Entry(index, tag, null, name, descriptor, bootstrapMethodIndex, hashCode));
+    }
+
+    /**
+      * Adds a CONSTANT_Module_info to the constant pool of this symbol table. Does nothing if the
+      * constant pool already contains a similar item.
+      *
+      * @param moduleName a fully qualified name (using dots) of a module.
+      * @return a new or already existing Symbol with the given value.
+      */
+    Symbol addConstantModule(final String moduleName) {
+        return addConstantUtf8Reference(Symbol.CONSTANT_MODULE_TAG, moduleName);
+    }
+
+    /**
+      * Adds a CONSTANT_Package_info to the constant pool of this symbol table. Does nothing if the
+      * constant pool already contains a similar item.
+      *
+      * @param packageName the internal name of a package.
+      * @return a new or already existing Symbol with the given value.
+      */
+    Symbol addConstantPackage(final String packageName) {
+        return addConstantUtf8Reference(Symbol.CONSTANT_PACKAGE_TAG, packageName);
+    }
+
+    /**
+      * Adds a CONSTANT_Class_info, CONSTANT_String_info, CONSTANT_MethodType_info,
+      * CONSTANT_Module_info or CONSTANT_Package_info to the constant pool of this symbol table. Does
+      * nothing if the constant pool already contains a similar item.
+      *
+      * @param tag one of {@link Symbol#CONSTANT_CLASS_TAG}, {@link Symbol#CONSTANT_STRING_TAG}, {@link
+      *     Symbol#CONSTANT_METHOD_TYPE_TAG}, {@link Symbol#CONSTANT_MODULE_TAG} or {@link
+      *     Symbol#CONSTANT_PACKAGE_TAG}.
+      * @param value an internal class name, an arbitrary string, a method descriptor, a module or a
+      *     package name, depending on tag.
+      * @return a new or already existing Symbol with the given value.
+      */
+    private Symbol addConstantUtf8Reference(final int tag, final String value) {
+        int hashCode = hash(tag, value);
+        Entry entry = get(hashCode);
+        while (entry != null) {
+            if (entry.tag == tag && entry.hashCode == hashCode && entry.value.equals(value)) {
+                return entry;
+            }
+            entry = entry.next;
+        }
+        constantPool.put12(tag, addConstantUtf8(value));
+        return put(new Entry(constantPoolCount++, tag, value, hashCode));
+    }
+
+    /**
+      * Adds a new CONSTANT_Class_info, CONSTANT_String_info, CONSTANT_MethodType_info,
+      * CONSTANT_Module_info or CONSTANT_Package_info to the constant pool of this symbol table.
+      *
+      * @param index the constant pool index of the new Symbol.
+      * @param tag one of {@link Symbol#CONSTANT_CLASS_TAG}, {@link Symbol#CONSTANT_STRING_TAG}, {@link
+      *     Symbol#CONSTANT_METHOD_TYPE_TAG}, {@link Symbol#CONSTANT_MODULE_TAG} or {@link
+      *     Symbol#CONSTANT_PACKAGE_TAG}.
+      * @param value an internal class name, an arbitrary string, a method descriptor, a module or a
+      *     package name, depending on tag.
+      */
+    private void addConstantUtf8Reference(final int index, final int tag, final String value) {
+        add(new Entry(index, tag, value, hash(tag, value)));
+    }
+
+    // -----------------------------------------------------------------------------------------------
+    // Bootstrap method entries management.
+    // -----------------------------------------------------------------------------------------------
+
+    /**
+      * Adds a bootstrap method to the BootstrapMethods attribute of this symbol table. Does nothing if
+      * the BootstrapMethods already contains a similar bootstrap method.
+      *
+      * @param bootstrapMethodHandle a bootstrap method handle.
+      * @param bootstrapMethodArguments the bootstrap method arguments.
+      * @return a new or already existing Symbol with the given value.
+      */
+    Symbol addBootstrapMethod(
+            final Handle bootstrapMethodHandle, final Object... bootstrapMethodArguments) {
+        ByteVector bootstrapMethodsAttribute = bootstrapMethods;
+        if (bootstrapMethodsAttribute == null) {
+            bootstrapMethodsAttribute = bootstrapMethods = new ByteVector();
+        }
+
+        // The bootstrap method arguments can be Constant_Dynamic values, which reference other
+        // bootstrap methods. We must therefore add the bootstrap method arguments to the constant pool
+        // and BootstrapMethods attribute first, so that the BootstrapMethods attribute is not modified
+        // while adding the given bootstrap method to it, in the rest of this method.
+        int numBootstrapArguments = bootstrapMethodArguments.length;
+        int[] bootstrapMethodArgumentIndexes = new int[numBootstrapArguments];
+        for (int i = 0; i < numBootstrapArguments; i++) {
+            bootstrapMethodArgumentIndexes[i] = addConstant(bootstrapMethodArguments[i]).index;
+        }
+
+        // Write the bootstrap method in the BootstrapMethods table. This is necessary to be able to
+        // compare it with existing ones, and will be reverted below if there is already a similar
+        // bootstrap method.
+        int bootstrapMethodOffset = bootstrapMethodsAttribute.length;
+        bootstrapMethodsAttribute.putShort(
+                addConstantMethodHandle(
+                                bootstrapMethodHandle.getTag(),
+                                bootstrapMethodHandle.getOwner(),
+                                bootstrapMethodHandle.getName(),
+                                bootstrapMethodHandle.getDesc(),
+                                bootstrapMethodHandle.isInterface())
+                        .index);
+
+        bootstrapMethodsAttribute.putShort(numBootstrapArguments);
+        for (int i = 0; i < numBootstrapArguments; i++) {
+            bootstrapMethodsAttribute.putShort(bootstrapMethodArgumentIndexes[i]);
+        }
+
+        // Compute the length and the hash code of the bootstrap method.
+        int bootstrapMethodlength = bootstrapMethodsAttribute.length - bootstrapMethodOffset;
+        int hashCode = bootstrapMethodHandle.hashCode();
+        for (Object bootstrapMethodArgument : bootstrapMethodArguments) {
+            hashCode ^= bootstrapMethodArgument.hashCode();
+        }
+        hashCode &= 0x7FFFFFFF;
+
+        // Add the bootstrap method to the symbol table or revert the above changes.
+        return addBootstrapMethod(bootstrapMethodOffset, bootstrapMethodlength, hashCode);
+    }
+
+    /**
+      * Adds a bootstrap method to the BootstrapMethods attribute of this symbol table. Does nothing if
+      * the BootstrapMethods already contains a similar bootstrap method (more precisely, reverts the
+      * content of {@link #bootstrapMethods} to remove the last, duplicate bootstrap method).
+      *
+      * @param offset the offset of the last bootstrap method in {@link #bootstrapMethods}, in bytes.
+      * @param length the length of this bootstrap method in {@link #bootstrapMethods}, in bytes.
+      * @param hashCode the hash code of this bootstrap method.
+      * @return a new or already existing Symbol with the given value.
+      */
+    private Symbol addBootstrapMethod(final int offset, final int length, final int hashCode) {
+        final byte[] bootstrapMethodsData = bootstrapMethods.data;
+        Entry entry = get(hashCode);
+        while (entry != null) {
+            if (entry.tag == Symbol.BOOTSTRAP_METHOD_TAG && entry.hashCode == hashCode) {
+                int otherOffset = (int) entry.data;
+                boolean isSameBootstrapMethod = true;
+                for (int i = 0; i < length; ++i) {
+                    if (bootstrapMethodsData[offset + i] != bootstrapMethodsData[otherOffset + i]) {
+                        isSameBootstrapMethod = false;
+                        break;
+                    }
+                }
+                if (isSameBootstrapMethod) {
+                    bootstrapMethods.length = offset; // Revert to old position.
+                    return entry;
+                }
+            }
+            entry = entry.next;
+        }
+        return put(new Entry(bootstrapMethodCount++, Symbol.BOOTSTRAP_METHOD_TAG, offset, hashCode));
+    }
+
+    // -----------------------------------------------------------------------------------------------
+    // Type table entries management.
+    // -----------------------------------------------------------------------------------------------
+
+    /**
+      * Returns the type table element whose index is given.
+      *
+      * @param typeIndex a type table index.
+      * @return the type table element whose index is given.
+      */
+    Symbol getType(final int typeIndex) {
+        return typeTable[typeIndex];
+    }
+
+    /**
+      * Returns the label corresponding to the "forward uninitialized" type table element whose index
+      * is given.
+      *
+      * @param typeIndex the type table index of a "forward uninitialized" type table element.
+      * @return the label corresponding of the NEW instruction which created this "forward
+      *     uninitialized" type.
+      */
+    Label getForwardUninitializedLabel(final int typeIndex) {
+        return labelTable[(int) typeTable[typeIndex].data].label;
+    }
+
+    /**
+      * Adds a type in the type table of this symbol table. Does nothing if the type table already
+      * contains a similar type.
+      *
+      * @param value an internal class name.
+      * @return the index of a new or already existing type Symbol with the given value.
+      */
+    int addType(final String value) {
+        int hashCode = hash(Symbol.TYPE_TAG, value);
+        Entry entry = get(hashCode);
+        while (entry != null) {
+            if (entry.tag == Symbol.TYPE_TAG && entry.hashCode == hashCode && entry.value.equals(value)) {
+                return entry.index;
+            }
+            entry = entry.next;
+        }
+        return addTypeInternal(new Entry(typeCount, Symbol.TYPE_TAG, value, hashCode));
+    }
+
+    /**
+      * Adds an uninitialized type in the type table of this symbol table. Does nothing if the type
+      * table already contains a similar type.
+      *
+      * @param value an internal class name.
+      * @param bytecodeOffset the bytecode offset of the NEW instruction that created this
+      *     uninitialized type value.
+      * @return the index of a new or already existing type #@link Symbol} with the given value.
+      */
+    int addUninitializedType(final String value, final int bytecodeOffset) {
+        int hashCode = hash(Symbol.UNINITIALIZED_TYPE_TAG, value, bytecodeOffset);
+        Entry entry = get(hashCode);
+        while (entry != null) {
+            if (entry.tag == Symbol.UNINITIALIZED_TYPE_TAG
+                    && entry.hashCode == hashCode
+                    && entry.data == bytecodeOffset
+                    && entry.value.equals(value)) {
+                return entry.index;
+            }
+            entry = entry.next;
+        }
+        return addTypeInternal(
+                new Entry(typeCount, Symbol.UNINITIALIZED_TYPE_TAG, value, bytecodeOffset, hashCode));
+    }
+
+    /**
+      * Adds a "forward uninitialized" type in the type table of this symbol table. Does nothing if the
+      * type table already contains a similar type.
+      *
+      * @param value an internal class name.
+      * @param label the label of the NEW instruction that created this uninitialized type value. If
+      *     the label is resolved, use the {@link #addUninitializedType} method instead.
+      * @return the index of a new or already existing type {@link Symbol} with the given value.
+      */
+    int addForwardUninitializedType(final String value, final Label label) {
+        int labelIndex = getOrAddLabelEntry(label).index;
+        int hashCode = hash(Symbol.FORWARD_UNINITIALIZED_TYPE_TAG, value, labelIndex);
+        Entry entry = get(hashCode);
+        while (entry != null) {
+            if (entry.tag == Symbol.FORWARD_UNINITIALIZED_TYPE_TAG
+                    && entry.hashCode == hashCode
+                    && entry.data == labelIndex
+                    && entry.value.equals(value)) {
+                return entry.index;
+            }
+            entry = entry.next;
+        }
+        return addTypeInternal(
+                new Entry(typeCount, Symbol.FORWARD_UNINITIALIZED_TYPE_TAG, value, labelIndex, hashCode));
+    }
+
+    /**
+      * Adds a merged type in the type table of this symbol table. Does nothing if the type table
+      * already contains a similar type.
+      *
+      * @param typeTableIndex1 a {@link Symbol#TYPE_TAG} type, specified by its index in the type
+      *     table.
+      * @param typeTableIndex2 another {@link Symbol#TYPE_TAG} type, specified by its index in the type
+      *     table.
+      * @return the index of a new or already existing {@link Symbol#TYPE_TAG} type Symbol,
+      *     corresponding to the common super class of the given types.
+      */
+    int addMergedType(final int typeTableIndex1, final int typeTableIndex2) {
+        long data =
+                typeTableIndex1 < typeTableIndex2
+                        ? typeTableIndex1 | (((long) typeTableIndex2) << 32)
+                        : typeTableIndex2 | (((long) typeTableIndex1) << 32);
+        int hashCode = hash(Symbol.MERGED_TYPE_TAG, typeTableIndex1 + typeTableIndex2);
+        Entry entry = get(hashCode);
+        while (entry != null) {
+            if (entry.tag == Symbol.MERGED_TYPE_TAG && entry.hashCode == hashCode && entry.data == data) {
+                return entry.info;
+            }
+            entry = entry.next;
+        }
+        String type1 = typeTable[typeTableIndex1].value;
+        String type2 = typeTable[typeTableIndex2].value;
+        int commonSuperTypeIndex = addType(classWriter.getCommonSuperClass(type1, type2));
+        put(new Entry(typeCount, Symbol.MERGED_TYPE_TAG, data, hashCode)).info = commonSuperTypeIndex;
+        return commonSuperTypeIndex;
+    }
+
+    /**
+      * Adds the given type Symbol to {@link #typeTable}.
+      *
+      * @param entry a {@link Symbol#TYPE_TAG} or {@link Symbol#UNINITIALIZED_TYPE_TAG} type symbol.
+      *     The index of this Symbol must be equal to the current value of {@link #typeCount}.
+      * @return the index in {@link #typeTable} where the given type was added, which is also equal to
+      *     entry's index by hypothesis.
+      */
+    private int addTypeInternal(final Entry entry) {
+        if (typeTable == null) {
+            typeTable = new Entry[16];
+        }
+        if (typeCount == typeTable.length) {
+            Entry[] newTypeTable = new Entry[2 * typeTable.length];
+            System.arraycopy(typeTable, 0, newTypeTable, 0, typeTable.length);
+            typeTable = newTypeTable;
+        }
+        typeTable[typeCount++] = entry;
+        return put(entry).index;
+    }
+
+    /**
+      * Returns the {@link LabelEntry} corresponding to the given label. Creates a new one if there is
+      * no such entry.
+      *
+      * @param label the {@link Label} of a NEW instruction which created an uninitialized type, in the
+      *     case where this NEW instruction is after the &lt;init&gt; constructor call (in bytecode
+      *     offset order). See {@link Symbol#FORWARD_UNINITIALIZED_TYPE_TAG}.
+      * @return the {@link LabelEntry} corresponding to {@code label}.
+      */
+    private LabelEntry getOrAddLabelEntry(final Label label) {
+        if (labelEntries == null) {
+            labelEntries = new LabelEntry[16];
+            labelTable = new LabelEntry[16];
+        }
+        int hashCode = System.identityHashCode(label);
+        LabelEntry labelEntry = labelEntries[hashCode % labelEntries.length];
+        while (labelEntry != null && labelEntry.label != label) {
+            labelEntry = labelEntry.next;
+        }
+        if (labelEntry != null) {
+            return labelEntry;
+        }
+
+        if (labelCount > (labelEntries.length * 3) / 4) {
+            int currentCapacity = labelEntries.length;
+            int newCapacity = currentCapacity * 2 + 1;
+            LabelEntry[] newLabelEntries = new LabelEntry[newCapacity];
+            for (int i = currentCapacity - 1; i >= 0; --i) {
+                LabelEntry currentEntry = labelEntries[i];
+                while (currentEntry != null) {
+                    int newCurrentEntryIndex = System.identityHashCode(currentEntry.label) % newCapacity;
+                    LabelEntry nextEntry = currentEntry.next;
+                    currentEntry.next = newLabelEntries[newCurrentEntryIndex];
+                    newLabelEntries[newCurrentEntryIndex] = currentEntry;
+                    currentEntry = nextEntry;
+                }
+            }
+            labelEntries = newLabelEntries;
+        }
+        if (labelCount == labelTable.length) {
+            LabelEntry[] newLabelTable = new LabelEntry[2 * labelTable.length];
+            System.arraycopy(labelTable, 0, newLabelTable, 0, labelTable.length);
+            labelTable = newLabelTable;
+        }
+
+        labelEntry = new LabelEntry(labelCount, label);
+        int index = hashCode % labelEntries.length;
+        labelEntry.next = labelEntries[index];
+        labelEntries[index] = labelEntry;
+        labelTable[labelCount++] = labelEntry;
+        return labelEntry;
+    }
+
+    // -----------------------------------------------------------------------------------------------
+    // Static helper methods to compute hash codes.
+    // -----------------------------------------------------------------------------------------------
+
+    private static int hash(final int tag, final int value) {
+        return 0x7FFFFFFF & (tag + value);
+    }
+
+    private static int hash(final int tag, final long value) {
+        return 0x7FFFFFFF & (tag + (int) value + (int) (value >>> 32));
+    }
+
+    private static int hash(final int tag, final String value) {
+        return 0x7FFFFFFF & (tag + value.hashCode());
+    }
+
+    private static int hash(final int tag, final String value1, final int value2) {
+        return 0x7FFFFFFF & (tag + value1.hashCode() + value2);
+    }
+
+    private static int hash(final int tag, final String value1, final String value2) {
+        return 0x7FFFFFFF & (tag + value1.hashCode() * value2.hashCode());
+    }
+
+    private static int hash(
+            final int tag, final String value1, final String value2, final int value3) {
+        return 0x7FFFFFFF & (tag + value1.hashCode() * value2.hashCode() * (value3 + 1));
+    }
+
+    private static int hash(
+            final int tag, final String value1, final String value2, final String value3) {
+        return 0x7FFFFFFF & (tag + value1.hashCode() * value2.hashCode() * value3.hashCode());
+    }
+
+    private static int hash(
+            final int tag,
+            final String value1,
+            final String value2,
+            final String value3,
+            final int value4) {
+        return 0x7FFFFFFF & (tag + value1.hashCode() * value2.hashCode() * value3.hashCode() * value4);
+    }
+
+    /**
+      * An entry of a SymbolTable. This concrete and private subclass of {@link Symbol} adds two fields
+      * which are only used inside SymbolTable, to implement hash sets of symbols (in order to avoid
+      * duplicate symbols). See {@link #entries}.
+      *
+      * @author Eric Bruneton
+      */
+    private static final class Entry extends Symbol {
+
+        /** The hash code of this entry. */
+        final int hashCode;
+
+        /**
+          * Another entry (and so on recursively) having the same hash code (modulo the size of {@link
+          * #entries}) as this one.
+          */
+        Entry next;
+
+        Entry(
+                final int index,
+                final int tag,
+                final String owner,
+                final String name,
+                final String value,
+                final long data,
+                final int hashCode) {
+            super(index, tag, owner, name, value, data);
+            this.hashCode = hashCode;
+        }
+
+        Entry(final int index, final int tag, final String value, final int hashCode) {
+            super(index, tag, /* owner = */ null, /* name = */ null, value, /* data = */ 0);
+            this.hashCode = hashCode;
+        }
+
+        Entry(final int index, final int tag, final String value, final long data, final int hashCode) {
+            super(index, tag, /* owner = */ null, /* name = */ null, value, data);
+            this.hashCode = hashCode;
+        }
+
+        Entry(
+                final int index, final int tag, final String name, final String value, final int hashCode) {
+            super(index, tag, /* owner = */ null, name, value, /* data = */ 0);
+            this.hashCode = hashCode;
+        }
+
+        Entry(final int index, final int tag, final long data, final int hashCode) {
+            super(index, tag, /* owner = */ null, /* name = */ null, /* value = */ null, data);
+            this.hashCode = hashCode;
+        }
+    }
+
+    /**
+      * A label corresponding to a "forward uninitialized" type in the ASM specific {@link
+      * SymbolTable#typeTable} (see {@link Symbol#FORWARD_UNINITIALIZED_TYPE_TAG}).
+      *
+      * @author Eric Bruneton
+      */
+    private static final class LabelEntry {
+
+        /** The index of this label entry in the {@link SymbolTable#labelTable} array. */
+        final int index;
+
+        /** The value of this label entry. */
+        final Label label;
+
+        /**
+          * Another entry (and so on recursively) having the same hash code (modulo the size of {@link
+          * SymbolTable#labelEntries}}) as this one.
+          */
+        LabelEntry next;
+
+        LabelEntry(final int index, final Label label) {
+            this.index = index;
+            this.label = label;
+        }
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/org/objectweb/asm/Type.class b/tests/test_data/std/jdk/internal/org/objectweb/asm/Type.class
new file mode 100644
index 0000000000000000000000000000000000000000..cbc62d02d5a964804ca45f7c0e943bafe7f01d43
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diff --git a/tests/test_data/std/jdk/internal/org/objectweb/asm/Type.java b/tests/test_data/std/jdk/internal/org/objectweb/asm/Type.java
new file mode 100644
index 00000000..739b9444
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/org/objectweb/asm/Type.java
@@ -0,0 +1,952 @@
+/*
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/*
+ * This file is available under and governed by the GNU General Public
+ * License version 2 only, as published by the Free Software Foundation.
+ * However, the following notice accompanied the original version of this
+ * file:
+ *
+ * ASM: a very small and fast Java bytecode manipulation framework
+ * Copyright (c) 2000-2011 INRIA, France Telecom
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the copyright holders nor the names of its
+ *    contributors may be used to endorse or promote products derived from
+ *    this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+package jdk.internal.org.objectweb.asm;
+
+import java.lang.reflect.Constructor;
+import java.lang.reflect.Method;
+
+/**
+ * A Java field or method type. This class can be used to make it easier to manipulate type and
+ * method descriptors.
+ *
+ * @author Eric Bruneton
+ * @author Chris Nokleberg
+ */
+public final class Type {
+
+    /** The sort of the {@code void} type. See {@link #getSort}. */
+    public static final int VOID = 0;
+
+    /** The sort of the {@code boolean} type. See {@link #getSort}. */
+    public static final int BOOLEAN = 1;
+
+    /** The sort of the {@code char} type. See {@link #getSort}. */
+    public static final int CHAR = 2;
+
+    /** The sort of the {@code byte} type. See {@link #getSort}. */
+    public static final int BYTE = 3;
+
+    /** The sort of the {@code short} type. See {@link #getSort}. */
+    public static final int SHORT = 4;
+
+    /** The sort of the {@code int} type. See {@link #getSort}. */
+    public static final int INT = 5;
+
+    /** The sort of the {@code float} type. See {@link #getSort}. */
+    public static final int FLOAT = 6;
+
+    /** The sort of the {@code long} type. See {@link #getSort}. */
+    public static final int LONG = 7;
+
+    /** The sort of the {@code double} type. See {@link #getSort}. */
+    public static final int DOUBLE = 8;
+
+    /** The sort of array reference types. See {@link #getSort}. */
+    public static final int ARRAY = 9;
+
+    /** The sort of object reference types. See {@link #getSort}. */
+    public static final int OBJECT = 10;
+
+    /** The sort of method types. See {@link #getSort}. */
+    public static final int METHOD = 11;
+
+    /** The (private) sort of object reference types represented with an internal name. */
+    private static final int INTERNAL = 12;
+
+    /** The descriptors of the primitive types. */
+    private static final String PRIMITIVE_DESCRIPTORS = "VZCBSIFJD";
+
+    /** The {@code void} type. */
+    public static final Type VOID_TYPE = new Type(VOID, PRIMITIVE_DESCRIPTORS, VOID, VOID + 1);
+
+    /** The {@code boolean} type. */
+    public static final Type BOOLEAN_TYPE =
+            new Type(BOOLEAN, PRIMITIVE_DESCRIPTORS, BOOLEAN, BOOLEAN + 1);
+
+    /** The {@code char} type. */
+    public static final Type CHAR_TYPE = new Type(CHAR, PRIMITIVE_DESCRIPTORS, CHAR, CHAR + 1);
+
+    /** The {@code byte} type. */
+    public static final Type BYTE_TYPE = new Type(BYTE, PRIMITIVE_DESCRIPTORS, BYTE, BYTE + 1);
+
+    /** The {@code short} type. */
+    public static final Type SHORT_TYPE = new Type(SHORT, PRIMITIVE_DESCRIPTORS, SHORT, SHORT + 1);
+
+    /** The {@code int} type. */
+    public static final Type INT_TYPE = new Type(INT, PRIMITIVE_DESCRIPTORS, INT, INT + 1);
+
+    /** The {@code float} type. */
+    public static final Type FLOAT_TYPE = new Type(FLOAT, PRIMITIVE_DESCRIPTORS, FLOAT, FLOAT + 1);
+
+    /** The {@code long} type. */
+    public static final Type LONG_TYPE = new Type(LONG, PRIMITIVE_DESCRIPTORS, LONG, LONG + 1);
+
+    /** The {@code double} type. */
+    public static final Type DOUBLE_TYPE =
+            new Type(DOUBLE, PRIMITIVE_DESCRIPTORS, DOUBLE, DOUBLE + 1);
+
+    // -----------------------------------------------------------------------------------------------
+    // Fields
+    // -----------------------------------------------------------------------------------------------
+
+    /**
+      * The sort of this type. Either {@link #VOID}, {@link #BOOLEAN}, {@link #CHAR}, {@link #BYTE},
+      * {@link #SHORT}, {@link #INT}, {@link #FLOAT}, {@link #LONG}, {@link #DOUBLE}, {@link #ARRAY},
+      * {@link #OBJECT}, {@link #METHOD} or {@link #INTERNAL}.
+      */
+    private final int sort;
+
+    /**
+      * A buffer containing the value of this field or method type. This value is an internal name for
+      * {@link #OBJECT} and {@link #INTERNAL} types, and a field or method descriptor in the other
+      * cases.
+      *
+      * <p>For {@link #OBJECT} types, this field also contains the descriptor: the characters in
+      * [{@link #valueBegin},{@link #valueEnd}) contain the internal name, and those in [{@link
+      * #valueBegin} - 1, {@link #valueEnd} + 1) contain the descriptor.
+      */
+    private final String valueBuffer;
+
+    /**
+      * The beginning index, inclusive, of the value of this Java field or method type in {@link
+      * #valueBuffer}. This value is an internal name for {@link #OBJECT} and {@link #INTERNAL} types,
+      * and a field or method descriptor in the other cases.
+      */
+    private final int valueBegin;
+
+    /**
+      * The end index, exclusive, of the value of this Java field or method type in {@link
+      * #valueBuffer}. This value is an internal name for {@link #OBJECT} and {@link #INTERNAL} types,
+      * and a field or method descriptor in the other cases.
+      */
+    private final int valueEnd;
+
+    /**
+      * Constructs a reference type.
+      *
+      * @param sort the sort of this type, see {@link #sort}.
+      * @param valueBuffer a buffer containing the value of this field or method type.
+      * @param valueBegin the beginning index, inclusive, of the value of this field or method type in
+      *     valueBuffer.
+      * @param valueEnd the end index, exclusive, of the value of this field or method type in
+      *     valueBuffer.
+      */
+    private Type(final int sort, final String valueBuffer, final int valueBegin, final int valueEnd) {
+        this.sort = sort;
+        this.valueBuffer = valueBuffer;
+        this.valueBegin = valueBegin;
+        this.valueEnd = valueEnd;
+    }
+
+    // -----------------------------------------------------------------------------------------------
+    // Methods to get Type(s) from a descriptor, a reflected Method or Constructor, other types, etc.
+    // -----------------------------------------------------------------------------------------------
+
+    /**
+      * Returns the {@link Type} corresponding to the given type descriptor.
+      *
+      * @param typeDescriptor a field or method type descriptor.
+      * @return the {@link Type} corresponding to the given type descriptor.
+      */
+    public static Type getType(final String typeDescriptor) {
+        return getTypeInternal(typeDescriptor, 0, typeDescriptor.length());
+    }
+
+    /**
+      * Returns the {@link Type} corresponding to the given class.
+      *
+      * @param clazz a class.
+      * @return the {@link Type} corresponding to the given class.
+      */
+    public static Type getType(final Class<?> clazz) {
+        if (clazz.isPrimitive()) {
+            if (clazz == Integer.TYPE) {
+                return INT_TYPE;
+            } else if (clazz == Void.TYPE) {
+                return VOID_TYPE;
+            } else if (clazz == Boolean.TYPE) {
+                return BOOLEAN_TYPE;
+            } else if (clazz == Byte.TYPE) {
+                return BYTE_TYPE;
+            } else if (clazz == Character.TYPE) {
+                return CHAR_TYPE;
+            } else if (clazz == Short.TYPE) {
+                return SHORT_TYPE;
+            } else if (clazz == Double.TYPE) {
+                return DOUBLE_TYPE;
+            } else if (clazz == Float.TYPE) {
+                return FLOAT_TYPE;
+            } else if (clazz == Long.TYPE) {
+                return LONG_TYPE;
+            } else {
+                throw new AssertionError();
+            }
+        } else {
+            return getType(getDescriptor(clazz));
+        }
+    }
+
+    /**
+      * Returns the method {@link Type} corresponding to the given constructor.
+      *
+      * @param constructor a {@link Constructor} object.
+      * @return the method {@link Type} corresponding to the given constructor.
+      */
+    public static Type getType(final Constructor<?> constructor) {
+        return getType(getConstructorDescriptor(constructor));
+    }
+
+    /**
+      * Returns the method {@link Type} corresponding to the given method.
+      *
+      * @param method a {@link Method} object.
+      * @return the method {@link Type} corresponding to the given method.
+      */
+    public static Type getType(final Method method) {
+        return getType(getMethodDescriptor(method));
+    }
+
+    /**
+      * Returns the type of the elements of this array type. This method should only be used for an
+      * array type.
+      *
+      * @return Returns the type of the elements of this array type.
+      */
+    public Type getElementType() {
+        final int numDimensions = getDimensions();
+        return getTypeInternal(valueBuffer, valueBegin + numDimensions, valueEnd);
+    }
+
+    /**
+      * Returns the {@link Type} corresponding to the given internal name.
+      *
+      * @param internalName an internal name (see {@link Type#getInternalName()}).
+      * @return the {@link Type} corresponding to the given internal name.
+      */
+    public static Type getObjectType(final String internalName) {
+        return new Type(
+                internalName.charAt(0) == '[' ? ARRAY : INTERNAL, internalName, 0, internalName.length());
+    }
+
+    /**
+      * Returns the {@link Type} corresponding to the given method descriptor. Equivalent to <code>
+      * Type.getType(methodDescriptor)</code>.
+      *
+      * @param methodDescriptor a method descriptor.
+      * @return the {@link Type} corresponding to the given method descriptor.
+      */
+    public static Type getMethodType(final String methodDescriptor) {
+        return new Type(METHOD, methodDescriptor, 0, methodDescriptor.length());
+    }
+
+    /**
+      * Returns the method {@link Type} corresponding to the given argument and return types.
+      *
+      * @param returnType the return type of the method.
+      * @param argumentTypes the argument types of the method.
+      * @return the method {@link Type} corresponding to the given argument and return types.
+      */
+    public static Type getMethodType(final Type returnType, final Type... argumentTypes) {
+        return getType(getMethodDescriptor(returnType, argumentTypes));
+    }
+
+    /**
+      * Returns the argument types of methods of this type. This method should only be used for method
+      * types.
+      *
+      * @return the argument types of methods of this type.
+      */
+    public Type[] getArgumentTypes() {
+        return getArgumentTypes(getDescriptor());
+    }
+
+    /**
+      * Returns the {@link Type} values corresponding to the argument types of the given method
+      * descriptor.
+      *
+      * @param methodDescriptor a method descriptor.
+      * @return the {@link Type} values corresponding to the argument types of the given method
+      *     descriptor.
+      */
+    public static Type[] getArgumentTypes(final String methodDescriptor) {
+        // First step: compute the number of argument types in methodDescriptor.
+        int numArgumentTypes = getArgumentCount(methodDescriptor);
+
+        // Second step: create a Type instance for each argument type.
+        Type[] argumentTypes = new Type[numArgumentTypes];
+        // Skip the first character, which is always a '('.
+        int currentOffset = 1;
+        // Parse and create the argument types, one at each loop iteration.
+        int currentArgumentTypeIndex = 0;
+        while (methodDescriptor.charAt(currentOffset) != ')') {
+            final int currentArgumentTypeOffset = currentOffset;
+            while (methodDescriptor.charAt(currentOffset) == '[') {
+                currentOffset++;
+            }
+            if (methodDescriptor.charAt(currentOffset++) == 'L') {
+                // Skip the argument descriptor content.
+                int semiColumnOffset = methodDescriptor.indexOf(';', currentOffset);
+                currentOffset = Math.max(currentOffset, semiColumnOffset + 1);
+            }
+            argumentTypes[currentArgumentTypeIndex++] =
+                    getTypeInternal(methodDescriptor, currentArgumentTypeOffset, currentOffset);
+        }
+        return argumentTypes;
+    }
+
+    /**
+      * Returns the {@link Type} values corresponding to the argument types of the given method.
+      *
+      * @param method a method.
+      * @return the {@link Type} values corresponding to the argument types of the given method.
+      */
+    public static Type[] getArgumentTypes(final Method method) {
+        Class<?>[] classes = method.getParameterTypes();
+        Type[] types = new Type[classes.length];
+        for (int i = classes.length - 1; i >= 0; --i) {
+            types[i] = getType(classes[i]);
+        }
+        return types;
+    }
+
+    /**
+      * Returns the return type of methods of this type. This method should only be used for method
+      * types.
+      *
+      * @return the return type of methods of this type.
+      */
+    public Type getReturnType() {
+        return getReturnType(getDescriptor());
+    }
+
+    /**
+      * Returns the {@link Type} corresponding to the return type of the given method descriptor.
+      *
+      * @param methodDescriptor a method descriptor.
+      * @return the {@link Type} corresponding to the return type of the given method descriptor.
+      */
+    public static Type getReturnType(final String methodDescriptor) {
+        return getTypeInternal(
+                methodDescriptor, getReturnTypeOffset(methodDescriptor), methodDescriptor.length());
+    }
+
+    /**
+      * Returns the {@link Type} corresponding to the return type of the given method.
+      *
+      * @param method a method.
+      * @return the {@link Type} corresponding to the return type of the given method.
+      */
+    public static Type getReturnType(final Method method) {
+        return getType(method.getReturnType());
+    }
+
+    /**
+      * Returns the start index of the return type of the given method descriptor.
+      *
+      * @param methodDescriptor a method descriptor.
+      * @return the start index of the return type of the given method descriptor.
+      */
+    static int getReturnTypeOffset(final String methodDescriptor) {
+        // Skip the first character, which is always a '('.
+        int currentOffset = 1;
+        // Skip the argument types, one at a each loop iteration.
+        while (methodDescriptor.charAt(currentOffset) != ')') {
+            while (methodDescriptor.charAt(currentOffset) == '[') {
+                currentOffset++;
+            }
+            if (methodDescriptor.charAt(currentOffset++) == 'L') {
+                // Skip the argument descriptor content.
+                int semiColumnOffset = methodDescriptor.indexOf(';', currentOffset);
+                currentOffset = Math.max(currentOffset, semiColumnOffset + 1);
+            }
+        }
+        return currentOffset + 1;
+    }
+
+    /**
+      * Returns the {@link Type} corresponding to the given field or method descriptor.
+      *
+      * @param descriptorBuffer a buffer containing the field or method descriptor.
+      * @param descriptorBegin the beginning index, inclusive, of the field or method descriptor in
+      *     descriptorBuffer.
+      * @param descriptorEnd the end index, exclusive, of the field or method descriptor in
+      *     descriptorBuffer.
+      * @return the {@link Type} corresponding to the given type descriptor.
+      */
+    private static Type getTypeInternal(
+            final String descriptorBuffer, final int descriptorBegin, final int descriptorEnd) {
+        switch (descriptorBuffer.charAt(descriptorBegin)) {
+            case 'V':
+                return VOID_TYPE;
+            case 'Z':
+                return BOOLEAN_TYPE;
+            case 'C':
+                return CHAR_TYPE;
+            case 'B':
+                return BYTE_TYPE;
+            case 'S':
+                return SHORT_TYPE;
+            case 'I':
+                return INT_TYPE;
+            case 'F':
+                return FLOAT_TYPE;
+            case 'J':
+                return LONG_TYPE;
+            case 'D':
+                return DOUBLE_TYPE;
+            case '[':
+                return new Type(ARRAY, descriptorBuffer, descriptorBegin, descriptorEnd);
+            case 'L':
+                return new Type(OBJECT, descriptorBuffer, descriptorBegin + 1, descriptorEnd - 1);
+            case '(':
+                return new Type(METHOD, descriptorBuffer, descriptorBegin, descriptorEnd);
+            default:
+                throw new IllegalArgumentException("Invalid descriptor: " + descriptorBuffer);
+        }
+    }
+
+    // -----------------------------------------------------------------------------------------------
+    // Methods to get class names, internal names or descriptors.
+    // -----------------------------------------------------------------------------------------------
+
+    /**
+      * Returns the binary name of the class corresponding to this type. This method must not be used
+      * on method types.
+      *
+      * @return the binary name of the class corresponding to this type.
+      */
+    public String getClassName() {
+        switch (sort) {
+            case VOID:
+                return "void";
+            case BOOLEAN:
+                return "boolean";
+            case CHAR:
+                return "char";
+            case BYTE:
+                return "byte";
+            case SHORT:
+                return "short";
+            case INT:
+                return "int";
+            case FLOAT:
+                return "float";
+            case LONG:
+                return "long";
+            case DOUBLE:
+                return "double";
+            case ARRAY:
+                StringBuilder stringBuilder = new StringBuilder(getElementType().getClassName());
+                for (int i = getDimensions(); i > 0; --i) {
+                    stringBuilder.append("[]");
+                }
+                return stringBuilder.toString();
+            case OBJECT:
+            case INTERNAL:
+                return valueBuffer.substring(valueBegin, valueEnd).replace('/', '.');
+            default:
+                throw new AssertionError();
+        }
+    }
+
+    /**
+      * Returns the internal name of the class corresponding to this object or array type. The internal
+      * name of a class is its fully qualified name (as returned by Class.getName(), where '.' are
+      * replaced by '/'). This method should only be used for an object or array type.
+      *
+      * @return the internal name of the class corresponding to this object type.
+      */
+    public String getInternalName() {
+        return valueBuffer.substring(valueBegin, valueEnd);
+    }
+
+    /**
+      * Returns the internal name of the given class. The internal name of a class is its fully
+      * qualified name, as returned by Class.getName(), where '.' are replaced by '/'.
+      *
+      * @param clazz an object or array class.
+      * @return the internal name of the given class.
+      */
+    public static String getInternalName(final Class<?> clazz) {
+        return clazz.getName().replace('.', '/');
+    }
+
+    /**
+      * Returns the descriptor corresponding to this type.
+      *
+      * @return the descriptor corresponding to this type.
+      */
+    public String getDescriptor() {
+        if (sort == OBJECT) {
+            return valueBuffer.substring(valueBegin - 1, valueEnd + 1);
+        } else if (sort == INTERNAL) {
+            return 'L' + valueBuffer.substring(valueBegin, valueEnd) + ';';
+        } else {
+            return valueBuffer.substring(valueBegin, valueEnd);
+        }
+    }
+
+    /**
+      * Returns the descriptor corresponding to the given class.
+      *
+      * @param clazz an object class, a primitive class or an array class.
+      * @return the descriptor corresponding to the given class.
+      */
+    public static String getDescriptor(final Class<?> clazz) {
+        StringBuilder stringBuilder = new StringBuilder();
+        appendDescriptor(clazz, stringBuilder);
+        return stringBuilder.toString();
+    }
+
+    /**
+      * Returns the descriptor corresponding to the given constructor.
+      *
+      * @param constructor a {@link Constructor} object.
+      * @return the descriptor of the given constructor.
+      */
+    public static String getConstructorDescriptor(final Constructor<?> constructor) {
+        StringBuilder stringBuilder = new StringBuilder();
+        stringBuilder.append('(');
+        Class<?>[] parameters = constructor.getParameterTypes();
+        for (Class<?> parameter : parameters) {
+            appendDescriptor(parameter, stringBuilder);
+        }
+        return stringBuilder.append(")V").toString();
+    }
+
+    /**
+      * Returns the descriptor corresponding to the given argument and return types.
+      *
+      * @param returnType the return type of the method.
+      * @param argumentTypes the argument types of the method.
+      * @return the descriptor corresponding to the given argument and return types.
+      */
+    public static String getMethodDescriptor(final Type returnType, final Type... argumentTypes) {
+        StringBuilder stringBuilder = new StringBuilder();
+        stringBuilder.append('(');
+        for (Type argumentType : argumentTypes) {
+            argumentType.appendDescriptor(stringBuilder);
+        }
+        stringBuilder.append(')');
+        returnType.appendDescriptor(stringBuilder);
+        return stringBuilder.toString();
+    }
+
+    /**
+      * Returns the descriptor corresponding to the given method.
+      *
+      * @param method a {@link Method} object.
+      * @return the descriptor of the given method.
+      */
+    public static String getMethodDescriptor(final Method method) {
+        StringBuilder stringBuilder = new StringBuilder();
+        stringBuilder.append('(');
+        Class<?>[] parameters = method.getParameterTypes();
+        for (Class<?> parameter : parameters) {
+            appendDescriptor(parameter, stringBuilder);
+        }
+        stringBuilder.append(')');
+        appendDescriptor(method.getReturnType(), stringBuilder);
+        return stringBuilder.toString();
+    }
+
+    /**
+      * Appends the descriptor corresponding to this type to the given string buffer.
+      *
+      * @param stringBuilder the string builder to which the descriptor must be appended.
+      */
+    private void appendDescriptor(final StringBuilder stringBuilder) {
+        if (sort == OBJECT) {
+            stringBuilder.append(valueBuffer, valueBegin - 1, valueEnd + 1);
+        } else if (sort == INTERNAL) {
+            stringBuilder.append('L').append(valueBuffer, valueBegin, valueEnd).append(';');
+        } else {
+            stringBuilder.append(valueBuffer, valueBegin, valueEnd);
+        }
+    }
+
+    /**
+      * Appends the descriptor of the given class to the given string builder.
+      *
+      * @param clazz the class whose descriptor must be computed.
+      * @param stringBuilder the string builder to which the descriptor must be appended.
+      */
+    private static void appendDescriptor(final Class<?> clazz, final StringBuilder stringBuilder) {
+        Class<?> currentClass = clazz;
+        while (currentClass.isArray()) {
+            stringBuilder.append('[');
+            currentClass = currentClass.getComponentType();
+        }
+        if (currentClass.isPrimitive()) {
+            char descriptor;
+            if (currentClass == Integer.TYPE) {
+                descriptor = 'I';
+            } else if (currentClass == Void.TYPE) {
+                descriptor = 'V';
+            } else if (currentClass == Boolean.TYPE) {
+                descriptor = 'Z';
+            } else if (currentClass == Byte.TYPE) {
+                descriptor = 'B';
+            } else if (currentClass == Character.TYPE) {
+                descriptor = 'C';
+            } else if (currentClass == Short.TYPE) {
+                descriptor = 'S';
+            } else if (currentClass == Double.TYPE) {
+                descriptor = 'D';
+            } else if (currentClass == Float.TYPE) {
+                descriptor = 'F';
+            } else if (currentClass == Long.TYPE) {
+                descriptor = 'J';
+            } else {
+                throw new AssertionError();
+            }
+            stringBuilder.append(descriptor);
+        } else {
+            stringBuilder.append('L').append(getInternalName(currentClass)).append(';');
+        }
+    }
+
+    // -----------------------------------------------------------------------------------------------
+    // Methods to get the sort, dimension, size, and opcodes corresponding to a Type or descriptor.
+    // -----------------------------------------------------------------------------------------------
+
+    /**
+      * Returns the sort of this type.
+      *
+      * @return {@link #VOID}, {@link #BOOLEAN}, {@link #CHAR}, {@link #BYTE}, {@link #SHORT}, {@link
+      *     #INT}, {@link #FLOAT}, {@link #LONG}, {@link #DOUBLE}, {@link #ARRAY}, {@link #OBJECT} or
+      *     {@link #METHOD}.
+      */
+    public int getSort() {
+        return sort == INTERNAL ? OBJECT : sort;
+    }
+
+    /**
+      * Returns the number of dimensions of this array type. This method should only be used for an
+      * array type.
+      *
+      * @return the number of dimensions of this array type.
+      */
+    public int getDimensions() {
+        int numDimensions = 1;
+        while (valueBuffer.charAt(valueBegin + numDimensions) == '[') {
+            numDimensions++;
+        }
+        return numDimensions;
+    }
+
+    /**
+      * Returns the size of values of this type. This method must not be used for method types.
+      *
+      * @return the size of values of this type, i.e., 2 for {@code long} and {@code double}, 0 for
+      *     {@code void} and 1 otherwise.
+      */
+    public int getSize() {
+        switch (sort) {
+            case VOID:
+                return 0;
+            case BOOLEAN:
+            case CHAR:
+            case BYTE:
+            case SHORT:
+            case INT:
+            case FLOAT:
+            case ARRAY:
+            case OBJECT:
+            case INTERNAL:
+                return 1;
+            case LONG:
+            case DOUBLE:
+                return 2;
+            default:
+                throw new AssertionError();
+        }
+    }
+
+    /**
+      * Returns the number of arguments of this method type. This method should only be used for method
+      * types.
+      *
+      * @return the number of arguments of this method type. Each argument counts for 1, even long and
+      *     double ones. The implicit @literal{this} argument is not counted.
+      */
+    public int getArgumentCount() {
+        return getArgumentCount(getDescriptor());
+    }
+
+    /**
+      * Returns the number of arguments in the given method descriptor.
+      *
+      * @param methodDescriptor a method descriptor.
+      * @return the number of arguments in the given method descriptor. Each argument counts for 1,
+      *     even long and double ones. The implicit @literal{this} argument is not counted.
+      */
+    public static int getArgumentCount(final String methodDescriptor) {
+        int argumentCount = 0;
+        // Skip the first character, which is always a '('.
+        int currentOffset = 1;
+        // Parse the argument types, one at a each loop iteration.
+        while (methodDescriptor.charAt(currentOffset) != ')') {
+            while (methodDescriptor.charAt(currentOffset) == '[') {
+                currentOffset++;
+            }
+            if (methodDescriptor.charAt(currentOffset++) == 'L') {
+                // Skip the argument descriptor content.
+                int semiColumnOffset = methodDescriptor.indexOf(';', currentOffset);
+                currentOffset = Math.max(currentOffset, semiColumnOffset + 1);
+            }
+            ++argumentCount;
+        }
+        return argumentCount;
+    }
+
+    /**
+      * Returns the size of the arguments and of the return value of methods of this type. This method
+      * should only be used for method types.
+      *
+      * @return the size of the arguments of the method (plus one for the implicit this argument),
+      *     argumentsSize, and the size of its return value, returnSize, packed into a single int i =
+      *     {@code (argumentsSize &lt;&lt; 2) | returnSize} (argumentsSize is therefore equal to {@code
+      *     i &gt;&gt; 2}, and returnSize to {@code i &amp; 0x03}). Long and double values have size 2,
+      *     the others have size 1.
+      */
+    public int getArgumentsAndReturnSizes() {
+        return getArgumentsAndReturnSizes(getDescriptor());
+    }
+
+    /**
+      * Computes the size of the arguments and of the return value of a method.
+      *
+      * @param methodDescriptor a method descriptor.
+      * @return the size of the arguments of the method (plus one for the implicit this argument),
+      *     argumentsSize, and the size of its return value, returnSize, packed into a single int i =
+      *     {@code (argumentsSize &lt;&lt; 2) | returnSize} (argumentsSize is therefore equal to {@code
+      *     i &gt;&gt; 2}, and returnSize to {@code i &amp; 0x03}). Long and double values have size 2,
+      *     the others have size 1.
+      */
+    public static int getArgumentsAndReturnSizes(final String methodDescriptor) {
+        int argumentsSize = 1;
+        // Skip the first character, which is always a '('.
+        int currentOffset = 1;
+        int currentChar = methodDescriptor.charAt(currentOffset);
+        // Parse the argument types and compute their size, one at a each loop iteration.
+        while (currentChar != ')') {
+            if (currentChar == 'J' || currentChar == 'D') {
+                currentOffset++;
+                argumentsSize += 2;
+            } else {
+                while (methodDescriptor.charAt(currentOffset) == '[') {
+                    currentOffset++;
+                }
+                if (methodDescriptor.charAt(currentOffset++) == 'L') {
+                    // Skip the argument descriptor content.
+                    int semiColumnOffset = methodDescriptor.indexOf(';', currentOffset);
+                    currentOffset = Math.max(currentOffset, semiColumnOffset + 1);
+                }
+                argumentsSize += 1;
+            }
+            currentChar = methodDescriptor.charAt(currentOffset);
+        }
+        currentChar = methodDescriptor.charAt(currentOffset + 1);
+        if (currentChar == 'V') {
+            return argumentsSize << 2;
+        } else {
+            int returnSize = (currentChar == 'J' || currentChar == 'D') ? 2 : 1;
+            return argumentsSize << 2 | returnSize;
+        }
+    }
+
+    /**
+      * Returns a JVM instruction opcode adapted to this {@link Type}. This method must not be used for
+      * method types.
+      *
+      * @param opcode a JVM instruction opcode. This opcode must be one of ILOAD, ISTORE, IALOAD,
+      *     IASTORE, IADD, ISUB, IMUL, IDIV, IREM, INEG, ISHL, ISHR, IUSHR, IAND, IOR, IXOR and
+      *     IRETURN.
+      * @return an opcode that is similar to the given opcode, but adapted to this {@link Type}. For
+      *     example, if this type is {@code float} and {@code opcode} is IRETURN, this method returns
+      *     FRETURN.
+      */
+    public int getOpcode(final int opcode) {
+        if (opcode == Opcodes.IALOAD || opcode == Opcodes.IASTORE) {
+            switch (sort) {
+                case BOOLEAN:
+                case BYTE:
+                    return opcode + (Opcodes.BALOAD - Opcodes.IALOAD);
+                case CHAR:
+                    return opcode + (Opcodes.CALOAD - Opcodes.IALOAD);
+                case SHORT:
+                    return opcode + (Opcodes.SALOAD - Opcodes.IALOAD);
+                case INT:
+                    return opcode;
+                case FLOAT:
+                    return opcode + (Opcodes.FALOAD - Opcodes.IALOAD);
+                case LONG:
+                    return opcode + (Opcodes.LALOAD - Opcodes.IALOAD);
+                case DOUBLE:
+                    return opcode + (Opcodes.DALOAD - Opcodes.IALOAD);
+                case ARRAY:
+                case OBJECT:
+                case INTERNAL:
+                    return opcode + (Opcodes.AALOAD - Opcodes.IALOAD);
+                case METHOD:
+                case VOID:
+                    throw new UnsupportedOperationException();
+                default:
+                    throw new AssertionError();
+            }
+        } else {
+            switch (sort) {
+                case VOID:
+                    if (opcode != Opcodes.IRETURN) {
+                        throw new UnsupportedOperationException();
+                    }
+                    return Opcodes.RETURN;
+                case BOOLEAN:
+                case BYTE:
+                case CHAR:
+                case SHORT:
+                case INT:
+                    return opcode;
+                case FLOAT:
+                    return opcode + (Opcodes.FRETURN - Opcodes.IRETURN);
+                case LONG:
+                    return opcode + (Opcodes.LRETURN - Opcodes.IRETURN);
+                case DOUBLE:
+                    return opcode + (Opcodes.DRETURN - Opcodes.IRETURN);
+                case ARRAY:
+                case OBJECT:
+                case INTERNAL:
+                    if (opcode != Opcodes.ILOAD && opcode != Opcodes.ISTORE && opcode != Opcodes.IRETURN) {
+                        throw new UnsupportedOperationException();
+                    }
+                    return opcode + (Opcodes.ARETURN - Opcodes.IRETURN);
+                case METHOD:
+                    throw new UnsupportedOperationException();
+                default:
+                    throw new AssertionError();
+            }
+        }
+    }
+
+    // -----------------------------------------------------------------------------------------------
+    // Equals, hashCode and toString.
+    // -----------------------------------------------------------------------------------------------
+
+    /**
+      * Tests if the given object is equal to this type.
+      *
+      * @param object the object to be compared to this type.
+      * @return {@literal true} if the given object is equal to this type.
+      */
+    @Override
+    public boolean equals(final Object object) {
+        if (this == object) {
+            return true;
+        }
+        if (!(object instanceof Type)) {
+            return false;
+        }
+        Type other = (Type) object;
+        if ((sort == INTERNAL ? OBJECT : sort) != (other.sort == INTERNAL ? OBJECT : other.sort)) {
+            return false;
+        }
+        int begin = valueBegin;
+        int end = valueEnd;
+        int otherBegin = other.valueBegin;
+        int otherEnd = other.valueEnd;
+        // Compare the values.
+        if (end - begin != otherEnd - otherBegin) {
+            return false;
+        }
+        for (int i = begin, j = otherBegin; i < end; i++, j++) {
+            if (valueBuffer.charAt(i) != other.valueBuffer.charAt(j)) {
+                return false;
+            }
+        }
+        return true;
+    }
+
+    /**
+      * Returns a hash code value for this type.
+      *
+      * @return a hash code value for this type.
+      */
+    @Override
+    public int hashCode() {
+        int hashCode = 13 * (sort == INTERNAL ? OBJECT : sort);
+        if (sort >= ARRAY) {
+            for (int i = valueBegin, end = valueEnd; i < end; i++) {
+                hashCode = 17 * (hashCode + valueBuffer.charAt(i));
+            }
+        }
+        return hashCode;
+    }
+
+    /**
+      * Returns a string representation of this type.
+      *
+      * @return the descriptor of this type.
+      */
+    @Override
+    public String toString() {
+        return getDescriptor();
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/org/objectweb/asm/TypePath.class b/tests/test_data/std/jdk/internal/org/objectweb/asm/TypePath.class
new file mode 100644
index 0000000000000000000000000000000000000000..878b1915faeffe6f9fb05069e64419475e170776
GIT binary patch
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diff --git a/tests/test_data/std/jdk/internal/org/objectweb/asm/TypePath.java b/tests/test_data/std/jdk/internal/org/objectweb/asm/TypePath.java
new file mode 100644
index 00000000..ea1025dd
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/org/objectweb/asm/TypePath.java
@@ -0,0 +1,232 @@
+/*
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/*
+ * This file is available under and governed by the GNU General Public
+ * License version 2 only, as published by the Free Software Foundation.
+ * However, the following notice accompanied the original version of this
+ * file:
+ *
+ * ASM: a very small and fast Java bytecode manipulation framework
+ * Copyright (c) 2000-2011 INRIA, France Telecom
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the copyright holders nor the names of its
+ *    contributors may be used to endorse or promote products derived from
+ *    this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+package jdk.internal.org.objectweb.asm;
+
+/**
+ * The path to a type argument, wildcard bound, array element type, or static inner type within an
+ * enclosing type.
+ *
+ * @author Eric Bruneton
+ */
+public final class TypePath {
+
+    /** A type path step that steps into the element type of an array type. See {@link #getStep}. */
+    public static final int ARRAY_ELEMENT = 0;
+
+    /** A type path step that steps into the nested type of a class type. See {@link #getStep}. */
+    public static final int INNER_TYPE = 1;
+
+    /** A type path step that steps into the bound of a wildcard type. See {@link #getStep}. */
+    public static final int WILDCARD_BOUND = 2;
+
+    /** A type path step that steps into a type argument of a generic type. See {@link #getStep}. */
+    public static final int TYPE_ARGUMENT = 3;
+
+    /**
+      * The byte array where the 'type_path' structure - as defined in the Java Virtual Machine
+      * Specification (JVMS) - corresponding to this TypePath is stored. The first byte of the
+      * structure in this array is given by {@link #typePathOffset}.
+      *
+      * @see <a
+      *     href="https://docs.oracle.com/javase/specs/jvms/se9/html/jvms-4.html#jvms-4.7.20.2">JVMS
+      *     4.7.20.2</a>
+      */
+    private final byte[] typePathContainer;
+
+    /** The offset of the first byte of the type_path JVMS structure in {@link #typePathContainer}. */
+    private final int typePathOffset;
+
+    /**
+      * Constructs a new TypePath.
+      *
+      * @param typePathContainer a byte array containing a type_path JVMS structure.
+      * @param typePathOffset the offset of the first byte of the type_path structure in
+      *     typePathContainer.
+      */
+    TypePath(final byte[] typePathContainer, final int typePathOffset) {
+        this.typePathContainer = typePathContainer;
+        this.typePathOffset = typePathOffset;
+    }
+
+    /**
+      * Returns the length of this path, i.e. its number of steps.
+      *
+      * @return the length of this path.
+      */
+    public int getLength() {
+        // path_length is stored in the first byte of a type_path.
+        return typePathContainer[typePathOffset];
+    }
+
+    /**
+      * Returns the value of the given step of this path.
+      *
+      * @param index an index between 0 and {@link #getLength()}, exclusive.
+      * @return one of {@link #ARRAY_ELEMENT}, {@link #INNER_TYPE}, {@link #WILDCARD_BOUND}, or {@link
+      *     #TYPE_ARGUMENT}.
+      */
+    public int getStep(final int index) {
+        // Returns the type_path_kind of the path element of the given index.
+        return typePathContainer[typePathOffset + 2 * index + 1];
+    }
+
+    /**
+      * Returns the index of the type argument that the given step is stepping into. This method should
+      * only be used for steps whose value is {@link #TYPE_ARGUMENT}.
+      *
+      * @param index an index between 0 and {@link #getLength()}, exclusive.
+      * @return the index of the type argument that the given step is stepping into.
+      */
+    public int getStepArgument(final int index) {
+        // Returns the type_argument_index of the path element of the given index.
+        return typePathContainer[typePathOffset + 2 * index + 2];
+    }
+
+    /**
+      * Converts a type path in string form, in the format used by {@link #toString()}, into a TypePath
+      * object.
+      *
+      * @param typePath a type path in string form, in the format used by {@link #toString()}. May be
+      *     {@literal null} or empty.
+      * @return the corresponding TypePath object, or {@literal null} if the path is empty.
+      */
+    public static TypePath fromString(final String typePath) {
+        if (typePath == null || typePath.length() == 0) {
+            return null;
+        }
+        int typePathLength = typePath.length();
+        ByteVector output = new ByteVector(typePathLength);
+        output.putByte(0);
+        int typePathIndex = 0;
+        while (typePathIndex < typePathLength) {
+            char c = typePath.charAt(typePathIndex++);
+            if (c == '[') {
+                output.put11(ARRAY_ELEMENT, 0);
+            } else if (c == '.') {
+                output.put11(INNER_TYPE, 0);
+            } else if (c == '*') {
+                output.put11(WILDCARD_BOUND, 0);
+            } else if (c >= '0' && c <= '9') {
+                int typeArg = c - '0';
+                while (typePathIndex < typePathLength) {
+                    c = typePath.charAt(typePathIndex++);
+                    if (c >= '0' && c <= '9') {
+                        typeArg = typeArg * 10 + c - '0';
+                    } else if (c == ';') {
+                        break;
+                    } else {
+                        throw new IllegalArgumentException();
+                    }
+                }
+                output.put11(TYPE_ARGUMENT, typeArg);
+            } else {
+                throw new IllegalArgumentException();
+            }
+        }
+        output.data[0] = (byte) (output.length / 2);
+        return new TypePath(output.data, 0);
+    }
+
+    /**
+      * Returns a string representation of this type path. {@link #ARRAY_ELEMENT} steps are represented
+      * with '[', {@link #INNER_TYPE} steps with '.', {@link #WILDCARD_BOUND} steps with '*' and {@link
+      * #TYPE_ARGUMENT} steps with their type argument index in decimal form followed by ';'.
+      */
+    @Override
+    public String toString() {
+        int length = getLength();
+        StringBuilder result = new StringBuilder(length * 2);
+        for (int i = 0; i < length; ++i) {
+            switch (getStep(i)) {
+                case ARRAY_ELEMENT:
+                    result.append('[');
+                    break;
+                case INNER_TYPE:
+                    result.append('.');
+                    break;
+                case WILDCARD_BOUND:
+                    result.append('*');
+                    break;
+                case TYPE_ARGUMENT:
+                    result.append(getStepArgument(i)).append(';');
+                    break;
+                default:
+                    throw new AssertionError();
+            }
+        }
+        return result.toString();
+    }
+
+    /**
+      * Puts the type_path JVMS structure corresponding to the given TypePath into the given
+      * ByteVector.
+      *
+      * @param typePath a TypePath instance, or {@literal null} for empty paths.
+      * @param output where the type path must be put.
+      */
+    static void put(final TypePath typePath, final ByteVector output) {
+        if (typePath == null) {
+            output.putByte(0);
+        } else {
+            int length = typePath.typePathContainer[typePath.typePathOffset] * 2 + 1;
+            output.putByteArray(typePath.typePathContainer, typePath.typePathOffset, length);
+        }
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/org/objectweb/asm/TypeReference.class b/tests/test_data/std/jdk/internal/org/objectweb/asm/TypeReference.class
new file mode 100644
index 0000000000000000000000000000000000000000..d0886027b3c2c5d76ab21d1a45b222a7f5efb0c5
GIT binary patch
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diff --git a/tests/test_data/std/jdk/internal/org/objectweb/asm/TypeReference.java b/tests/test_data/std/jdk/internal/org/objectweb/asm/TypeReference.java
new file mode 100644
index 00000000..512dc8fc
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/org/objectweb/asm/TypeReference.java
@@ -0,0 +1,467 @@
+/*
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/*
+ * This file is available under and governed by the GNU General Public
+ * License version 2 only, as published by the Free Software Foundation.
+ * However, the following notice accompanied the original version of this
+ * file:
+ *
+ * ASM: a very small and fast Java bytecode manipulation framework
+ * Copyright (c) 2000-2011 INRIA, France Telecom
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the copyright holders nor the names of its
+ *    contributors may be used to endorse or promote products derived from
+ *    this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+package jdk.internal.org.objectweb.asm;
+
+/**
+ * A reference to a type appearing in a class, field or method declaration, or on an instruction.
+ * Such a reference designates the part of the class where the referenced type is appearing (e.g. an
+ * 'extends', 'implements' or 'throws' clause, a 'new' instruction, a 'catch' clause, a type cast, a
+ * local variable declaration, etc).
+ *
+ * @author Eric Bruneton
+ */
+public class TypeReference {
+
+    /**
+      * The sort of type references that target a type parameter of a generic class. See {@link
+      * #getSort}.
+      */
+    public static final int CLASS_TYPE_PARAMETER = 0x00;
+
+    /**
+      * The sort of type references that target a type parameter of a generic method. See {@link
+      * #getSort}.
+      */
+    public static final int METHOD_TYPE_PARAMETER = 0x01;
+
+    /**
+      * The sort of type references that target the super class of a class or one of the interfaces it
+      * implements. See {@link #getSort}.
+      */
+    public static final int CLASS_EXTENDS = 0x10;
+
+    /**
+      * The sort of type references that target a bound of a type parameter of a generic class. See
+      * {@link #getSort}.
+      */
+    public static final int CLASS_TYPE_PARAMETER_BOUND = 0x11;
+
+    /**
+      * The sort of type references that target a bound of a type parameter of a generic method. See
+      * {@link #getSort}.
+      */
+    public static final int METHOD_TYPE_PARAMETER_BOUND = 0x12;
+
+    /** The sort of type references that target the type of a field. See {@link #getSort}. */
+    public static final int FIELD = 0x13;
+
+    /** The sort of type references that target the return type of a method. See {@link #getSort}. */
+    public static final int METHOD_RETURN = 0x14;
+
+    /**
+      * The sort of type references that target the receiver type of a method. See {@link #getSort}.
+      */
+    public static final int METHOD_RECEIVER = 0x15;
+
+    /**
+      * The sort of type references that target the type of a formal parameter of a method. See {@link
+      * #getSort}.
+      */
+    public static final int METHOD_FORMAL_PARAMETER = 0x16;
+
+    /**
+      * The sort of type references that target the type of an exception declared in the throws clause
+      * of a method. See {@link #getSort}.
+      */
+    public static final int THROWS = 0x17;
+
+    /**
+      * The sort of type references that target the type of a local variable in a method. See {@link
+      * #getSort}.
+      */
+    public static final int LOCAL_VARIABLE = 0x40;
+
+    /**
+      * The sort of type references that target the type of a resource variable in a method. See {@link
+      * #getSort}.
+      */
+    public static final int RESOURCE_VARIABLE = 0x41;
+
+    /**
+      * The sort of type references that target the type of the exception of a 'catch' clause in a
+      * method. See {@link #getSort}.
+      */
+    public static final int EXCEPTION_PARAMETER = 0x42;
+
+    /**
+      * The sort of type references that target the type declared in an 'instanceof' instruction. See
+      * {@link #getSort}.
+      */
+    public static final int INSTANCEOF = 0x43;
+
+    /**
+      * The sort of type references that target the type of the object created by a 'new' instruction.
+      * See {@link #getSort}.
+      */
+    public static final int NEW = 0x44;
+
+    /**
+      * The sort of type references that target the receiver type of a constructor reference. See
+      * {@link #getSort}.
+      */
+    public static final int CONSTRUCTOR_REFERENCE = 0x45;
+
+    /**
+      * The sort of type references that target the receiver type of a method reference. See {@link
+      * #getSort}.
+      */
+    public static final int METHOD_REFERENCE = 0x46;
+
+    /**
+      * The sort of type references that target the type declared in an explicit or implicit cast
+      * instruction. See {@link #getSort}.
+      */
+    public static final int CAST = 0x47;
+
+    /**
+      * The sort of type references that target a type parameter of a generic constructor in a
+      * constructor call. See {@link #getSort}.
+      */
+    public static final int CONSTRUCTOR_INVOCATION_TYPE_ARGUMENT = 0x48;
+
+    /**
+      * The sort of type references that target a type parameter of a generic method in a method call.
+      * See {@link #getSort}.
+      */
+    public static final int METHOD_INVOCATION_TYPE_ARGUMENT = 0x49;
+
+    /**
+      * The sort of type references that target a type parameter of a generic constructor in a
+      * constructor reference. See {@link #getSort}.
+      */
+    public static final int CONSTRUCTOR_REFERENCE_TYPE_ARGUMENT = 0x4A;
+
+    /**
+      * The sort of type references that target a type parameter of a generic method in a method
+      * reference. See {@link #getSort}.
+      */
+    public static final int METHOD_REFERENCE_TYPE_ARGUMENT = 0x4B;
+
+    /**
+      * The target_type and target_info structures - as defined in the Java Virtual Machine
+      * Specification (JVMS) - corresponding to this type reference. target_type uses one byte, and all
+      * the target_info union fields use up to 3 bytes (except localvar_target, handled with the
+      * specific method {@link MethodVisitor#visitLocalVariableAnnotation}). Thus, both structures can
+      * be stored in an int.
+      *
+      * <p>This int field stores target_type (called the TypeReference 'sort' in the public API of this
+      * class) in its most significant byte, followed by the target_info fields. Depending on
+      * target_type, 1, 2 or even 3 least significant bytes of this field are unused. target_info
+      * fields which reference bytecode offsets are set to 0 (these offsets are ignored in ClassReader,
+      * and recomputed in MethodWriter).
+      *
+      * @see <a href="https://docs.oracle.com/javase/specs/jvms/se9/html/jvms-4.html#jvms-4.7.20">JVMS
+      *     4.7.20</a>
+      * @see <a
+      *     href="https://docs.oracle.com/javase/specs/jvms/se9/html/jvms-4.html#jvms-4.7.20.1">JVMS
+      *     4.7.20.1</a>
+      */
+    private final int targetTypeAndInfo;
+
+    /**
+      * Constructs a new TypeReference.
+      *
+      * @param typeRef the int encoded value of the type reference, as received in a visit method
+      *     related to type annotations, such as {@link ClassVisitor#visitTypeAnnotation}.
+      */
+    public TypeReference(final int typeRef) {
+        this.targetTypeAndInfo = typeRef;
+    }
+
+    /**
+      * Returns a type reference of the given sort.
+      *
+      * @param sort one of {@link #FIELD}, {@link #METHOD_RETURN}, {@link #METHOD_RECEIVER}, {@link
+      *     #LOCAL_VARIABLE}, {@link #RESOURCE_VARIABLE}, {@link #INSTANCEOF}, {@link #NEW}, {@link
+      *     #CONSTRUCTOR_REFERENCE}, or {@link #METHOD_REFERENCE}.
+      * @return a type reference of the given sort.
+      */
+    public static TypeReference newTypeReference(final int sort) {
+        return new TypeReference(sort << 24);
+    }
+
+    /**
+      * Returns a reference to a type parameter of a generic class or method.
+      *
+      * @param sort one of {@link #CLASS_TYPE_PARAMETER} or {@link #METHOD_TYPE_PARAMETER}.
+      * @param paramIndex the type parameter index.
+      * @return a reference to the given generic class or method type parameter.
+      */
+    public static TypeReference newTypeParameterReference(final int sort, final int paramIndex) {
+        return new TypeReference((sort << 24) | (paramIndex << 16));
+    }
+
+    /**
+      * Returns a reference to a type parameter bound of a generic class or method.
+      *
+      * @param sort one of {@link #CLASS_TYPE_PARAMETER} or {@link #METHOD_TYPE_PARAMETER}.
+      * @param paramIndex the type parameter index.
+      * @param boundIndex the type bound index within the above type parameters.
+      * @return a reference to the given generic class or method type parameter bound.
+      */
+    public static TypeReference newTypeParameterBoundReference(
+            final int sort, final int paramIndex, final int boundIndex) {
+        return new TypeReference((sort << 24) | (paramIndex << 16) | (boundIndex << 8));
+    }
+
+    /**
+      * Returns a reference to the super class or to an interface of the 'implements' clause of a
+      * class.
+      *
+      * @param itfIndex the index of an interface in the 'implements' clause of a class, or -1 to
+      *     reference the super class of the class.
+      * @return a reference to the given super type of a class.
+      */
+    public static TypeReference newSuperTypeReference(final int itfIndex) {
+        return new TypeReference((CLASS_EXTENDS << 24) | ((itfIndex & 0xFFFF) << 8));
+    }
+
+    /**
+      * Returns a reference to the type of a formal parameter of a method.
+      *
+      * @param paramIndex the formal parameter index.
+      * @return a reference to the type of the given method formal parameter.
+      */
+    public static TypeReference newFormalParameterReference(final int paramIndex) {
+        return new TypeReference((METHOD_FORMAL_PARAMETER << 24) | (paramIndex << 16));
+    }
+
+    /**
+      * Returns a reference to the type of an exception, in a 'throws' clause of a method.
+      *
+      * @param exceptionIndex the index of an exception in a 'throws' clause of a method.
+      * @return a reference to the type of the given exception.
+      */
+    public static TypeReference newExceptionReference(final int exceptionIndex) {
+        return new TypeReference((THROWS << 24) | (exceptionIndex << 8));
+    }
+
+    /**
+      * Returns a reference to the type of the exception declared in a 'catch' clause of a method.
+      *
+      * @param tryCatchBlockIndex the index of a try catch block (using the order in which they are
+      *     visited with visitTryCatchBlock).
+      * @return a reference to the type of the given exception.
+      */
+    public static TypeReference newTryCatchReference(final int tryCatchBlockIndex) {
+        return new TypeReference((EXCEPTION_PARAMETER << 24) | (tryCatchBlockIndex << 8));
+    }
+
+    /**
+      * Returns a reference to the type of a type argument in a constructor or method call or
+      * reference.
+      *
+      * @param sort one of {@link #CAST}, {@link #CONSTRUCTOR_INVOCATION_TYPE_ARGUMENT}, {@link
+      *     #METHOD_INVOCATION_TYPE_ARGUMENT}, {@link #CONSTRUCTOR_REFERENCE_TYPE_ARGUMENT}, or {@link
+      *     #METHOD_REFERENCE_TYPE_ARGUMENT}.
+      * @param argIndex the type argument index.
+      * @return a reference to the type of the given type argument.
+      */
+    public static TypeReference newTypeArgumentReference(final int sort, final int argIndex) {
+        return new TypeReference((sort << 24) | argIndex);
+    }
+
+    /**
+      * Returns the sort of this type reference.
+      *
+      * @return one of {@link #CLASS_TYPE_PARAMETER}, {@link #METHOD_TYPE_PARAMETER}, {@link
+      *     #CLASS_EXTENDS}, {@link #CLASS_TYPE_PARAMETER_BOUND}, {@link #METHOD_TYPE_PARAMETER_BOUND},
+      *     {@link #FIELD}, {@link #METHOD_RETURN}, {@link #METHOD_RECEIVER}, {@link
+      *     #METHOD_FORMAL_PARAMETER}, {@link #THROWS}, {@link #LOCAL_VARIABLE}, {@link
+      *     #RESOURCE_VARIABLE}, {@link #EXCEPTION_PARAMETER}, {@link #INSTANCEOF}, {@link #NEW},
+      *     {@link #CONSTRUCTOR_REFERENCE}, {@link #METHOD_REFERENCE}, {@link #CAST}, {@link
+      *     #CONSTRUCTOR_INVOCATION_TYPE_ARGUMENT}, {@link #METHOD_INVOCATION_TYPE_ARGUMENT}, {@link
+      *     #CONSTRUCTOR_REFERENCE_TYPE_ARGUMENT}, or {@link #METHOD_REFERENCE_TYPE_ARGUMENT}.
+      */
+    public int getSort() {
+        return targetTypeAndInfo >>> 24;
+    }
+
+    /**
+      * Returns the index of the type parameter referenced by this type reference. This method must
+      * only be used for type references whose sort is {@link #CLASS_TYPE_PARAMETER}, {@link
+      * #METHOD_TYPE_PARAMETER}, {@link #CLASS_TYPE_PARAMETER_BOUND} or {@link
+      * #METHOD_TYPE_PARAMETER_BOUND}.
+      *
+      * @return a type parameter index.
+      */
+    public int getTypeParameterIndex() {
+        return (targetTypeAndInfo & 0x00FF0000) >> 16;
+    }
+
+    /**
+      * Returns the index of the type parameter bound, within the type parameter {@link
+      * #getTypeParameterIndex}, referenced by this type reference. This method must only be used for
+      * type references whose sort is {@link #CLASS_TYPE_PARAMETER_BOUND} or {@link
+      * #METHOD_TYPE_PARAMETER_BOUND}.
+      *
+      * @return a type parameter bound index.
+      */
+    public int getTypeParameterBoundIndex() {
+        return (targetTypeAndInfo & 0x0000FF00) >> 8;
+    }
+
+    /**
+      * Returns the index of the "super type" of a class that is referenced by this type reference.
+      * This method must only be used for type references whose sort is {@link #CLASS_EXTENDS}.
+      *
+      * @return the index of an interface in the 'implements' clause of a class, or -1 if this type
+      *     reference references the type of the super class.
+      */
+    public int getSuperTypeIndex() {
+        return (short) ((targetTypeAndInfo & 0x00FFFF00) >> 8);
+    }
+
+    /**
+      * Returns the index of the formal parameter whose type is referenced by this type reference. This
+      * method must only be used for type references whose sort is {@link #METHOD_FORMAL_PARAMETER}.
+      *
+      * @return a formal parameter index.
+      */
+    public int getFormalParameterIndex() {
+        return (targetTypeAndInfo & 0x00FF0000) >> 16;
+    }
+
+    /**
+      * Returns the index of the exception, in a 'throws' clause of a method, whose type is referenced
+      * by this type reference. This method must only be used for type references whose sort is {@link
+      * #THROWS}.
+      *
+      * @return the index of an exception in the 'throws' clause of a method.
+      */
+    public int getExceptionIndex() {
+        return (targetTypeAndInfo & 0x00FFFF00) >> 8;
+    }
+
+    /**
+      * Returns the index of the try catch block (using the order in which they are visited with
+      * visitTryCatchBlock), whose 'catch' type is referenced by this type reference. This method must
+      * only be used for type references whose sort is {@link #EXCEPTION_PARAMETER} .
+      *
+      * @return the index of an exception in the 'throws' clause of a method.
+      */
+    public int getTryCatchBlockIndex() {
+        return (targetTypeAndInfo & 0x00FFFF00) >> 8;
+    }
+
+    /**
+      * Returns the index of the type argument referenced by this type reference. This method must only
+      * be used for type references whose sort is {@link #CAST}, {@link
+      * #CONSTRUCTOR_INVOCATION_TYPE_ARGUMENT}, {@link #METHOD_INVOCATION_TYPE_ARGUMENT}, {@link
+      * #CONSTRUCTOR_REFERENCE_TYPE_ARGUMENT}, or {@link #METHOD_REFERENCE_TYPE_ARGUMENT}.
+      *
+      * @return a type parameter index.
+      */
+    public int getTypeArgumentIndex() {
+        return targetTypeAndInfo & 0xFF;
+    }
+
+    /**
+      * Returns the int encoded value of this type reference, suitable for use in visit methods related
+      * to type annotations, like visitTypeAnnotation.
+      *
+      * @return the int encoded value of this type reference.
+      */
+    public int getValue() {
+        return targetTypeAndInfo;
+    }
+
+    /**
+      * Puts the given target_type and target_info JVMS structures into the given ByteVector.
+      *
+      * @param targetTypeAndInfo a target_type and a target_info structures encoded as in {@link
+      *     #targetTypeAndInfo}. LOCAL_VARIABLE and RESOURCE_VARIABLE target types are not supported.
+      * @param output where the type reference must be put.
+      */
+    static void putTarget(final int targetTypeAndInfo, final ByteVector output) {
+        switch (targetTypeAndInfo >>> 24) {
+            case CLASS_TYPE_PARAMETER:
+            case METHOD_TYPE_PARAMETER:
+            case METHOD_FORMAL_PARAMETER:
+                output.putShort(targetTypeAndInfo >>> 16);
+                break;
+            case FIELD:
+            case METHOD_RETURN:
+            case METHOD_RECEIVER:
+                output.putByte(targetTypeAndInfo >>> 24);
+                break;
+            case CAST:
+            case CONSTRUCTOR_INVOCATION_TYPE_ARGUMENT:
+            case METHOD_INVOCATION_TYPE_ARGUMENT:
+            case CONSTRUCTOR_REFERENCE_TYPE_ARGUMENT:
+            case METHOD_REFERENCE_TYPE_ARGUMENT:
+                output.putInt(targetTypeAndInfo);
+                break;
+            case CLASS_EXTENDS:
+            case CLASS_TYPE_PARAMETER_BOUND:
+            case METHOD_TYPE_PARAMETER_BOUND:
+            case THROWS:
+            case EXCEPTION_PARAMETER:
+            case INSTANCEOF:
+            case NEW:
+            case CONSTRUCTOR_REFERENCE:
+            case METHOD_REFERENCE:
+                output.put12(targetTypeAndInfo >>> 24, (targetTypeAndInfo & 0xFFFF00) >> 8);
+                break;
+            default:
+                throw new IllegalArgumentException();
+        }
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/org/objectweb/asm/commons/AdviceAdapter.class b/tests/test_data/std/jdk/internal/org/objectweb/asm/commons/AdviceAdapter.class
new file mode 100644
index 0000000000000000000000000000000000000000..6aa63488dd5007f84ce5f9cd38b48a1aac9c4613
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HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/org/objectweb/asm/commons/AdviceAdapter.java b/tests/test_data/std/jdk/internal/org/objectweb/asm/commons/AdviceAdapter.java
new file mode 100644
index 00000000..0d57c484
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/org/objectweb/asm/commons/AdviceAdapter.java
@@ -0,0 +1,702 @@
+/*
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/*
+ * This file is available under and governed by the GNU General Public
+ * License version 2 only, as published by the Free Software Foundation.
+ * However, the following notice accompanied the original version of this
+ * file:
+ *
+ * ASM: a very small and fast Java bytecode manipulation framework
+ * Copyright (c) 2000-2011 INRIA, France Telecom
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the copyright holders nor the names of its
+ *    contributors may be used to endorse or promote products derived from
+ *    this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+package jdk.internal.org.objectweb.asm.commons;
+
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import jdk.internal.org.objectweb.asm.ConstantDynamic;
+import jdk.internal.org.objectweb.asm.Handle;
+import jdk.internal.org.objectweb.asm.Label;
+import jdk.internal.org.objectweb.asm.MethodVisitor;
+import jdk.internal.org.objectweb.asm.Opcodes;
+import jdk.internal.org.objectweb.asm.Type;
+
+/**
+ * A {@link MethodVisitor} to insert before, after and around advices in methods and constructors.
+ * For constructors, the code keeps track of the elements on the stack in order to detect when the
+ * super class constructor is called (note that there can be multiple such calls in different
+ * branches). {@code onMethodEnter} is called after each super class constructor call, because the
+ * object cannot be used before it is properly initialized.
+ *
+ * @author Eugene Kuleshov
+ * @author Eric Bruneton
+ */
+public abstract class AdviceAdapter extends GeneratorAdapter implements Opcodes {
+
+    /** The "uninitialized this" value. */
+    private static final Object UNINITIALIZED_THIS = new Object();
+
+    /** Any value other than "uninitialized this". */
+    private static final Object OTHER = new Object();
+
+    /** Prefix of the error message when invalid opcodes are found. */
+    private static final String INVALID_OPCODE = "Invalid opcode ";
+
+    /** The access flags of the visited method. */
+    protected int methodAccess;
+
+    /** The descriptor of the visited method. */
+    protected String methodDesc;
+
+    /** Whether the visited method is a constructor. */
+    private final boolean isConstructor;
+
+    /**
+      * Whether the super class constructor has been called (if the visited method is a constructor),
+      * at the current instruction. There can be multiple call sites to the super constructor (e.g. for
+      * Java code such as {@code super(expr ? value1 : value2);}), in different branches. When scanning
+      * the bytecode linearly, we can move from one branch where the super constructor has been called
+      * to another where it has not been called yet. Therefore, this value can change from false to
+      * true, and vice-versa.
+      */
+    private boolean superClassConstructorCalled;
+
+    /**
+      * The values on the current execution stack frame (long and double are represented by two
+      * elements). Each value is either {@link #UNINITIALIZED_THIS} (for the uninitialized this value),
+      * or {@link #OTHER} (for any other value). This field is only maintained for constructors, in
+      * branches where the super class constructor has not been called yet.
+      */
+    private List<Object> stackFrame;
+
+    /**
+      * The stack map frames corresponding to the labels of the forward jumps made *before* the super
+      * class constructor has been called (note that the Java Virtual Machine forbids backward jumps
+      * before the super class constructor is called). Note that by definition (cf. the 'before'), when
+      * we reach a label from this map, {@link #superClassConstructorCalled} must be reset to false.
+      * This field is only maintained for constructors.
+      */
+    private Map<Label, List<Object>> forwardJumpStackFrames;
+
+    /**
+      * Constructs a new {@link AdviceAdapter}.
+      *
+      * @param api the ASM API version implemented by this visitor. Must be one of the {@code
+      *     ASM}<i>x</i> values in {@link Opcodes}.
+      * @param methodVisitor the method visitor to which this adapter delegates calls.
+      * @param access the method's access flags (see {@link Opcodes}).
+      * @param name the method's name.
+      * @param descriptor the method's descriptor (see {@link Type Type}).
+      */
+    protected AdviceAdapter(
+            final int api,
+            final MethodVisitor methodVisitor,
+            final int access,
+            final String name,
+            final String descriptor) {
+        super(api, methodVisitor, access, name, descriptor);
+        methodAccess = access;
+        methodDesc = descriptor;
+        isConstructor = "<init>".equals(name);
+    }
+
+    @Override
+    public void visitCode() {
+        super.visitCode();
+        if (isConstructor) {
+            stackFrame = new ArrayList<>();
+            forwardJumpStackFrames = new HashMap<>();
+        } else {
+            onMethodEnter();
+        }
+    }
+
+    @Override
+    public void visitLabel(final Label label) {
+        super.visitLabel(label);
+        if (isConstructor && forwardJumpStackFrames != null) {
+            List<Object> labelStackFrame = forwardJumpStackFrames.get(label);
+            if (labelStackFrame != null) {
+                stackFrame = labelStackFrame;
+                superClassConstructorCalled = false;
+                forwardJumpStackFrames.remove(label);
+            }
+        }
+    }
+
+    @Override
+    public void visitInsn(final int opcode) {
+        if (isConstructor && !superClassConstructorCalled) {
+            int stackSize;
+            switch (opcode) {
+                case IRETURN:
+                case FRETURN:
+                case ARETURN:
+                case LRETURN:
+                case DRETURN:
+                    throw new IllegalArgumentException("Invalid return in constructor");
+                case RETURN: // empty stack
+                    onMethodExit(opcode);
+                    endConstructorBasicBlockWithoutSuccessor();
+                    break;
+                case ATHROW: // 1 before n/a after
+                    popValue();
+                    onMethodExit(opcode);
+                    endConstructorBasicBlockWithoutSuccessor();
+                    break;
+                case NOP:
+                case LALOAD: // remove 2 add 2
+                case DALOAD: // remove 2 add 2
+                case LNEG:
+                case DNEG:
+                case FNEG:
+                case INEG:
+                case L2D:
+                case D2L:
+                case F2I:
+                case I2B:
+                case I2C:
+                case I2S:
+                case I2F:
+                case ARRAYLENGTH:
+                    break;
+                case ACONST_NULL:
+                case ICONST_M1:
+                case ICONST_0:
+                case ICONST_1:
+                case ICONST_2:
+                case ICONST_3:
+                case ICONST_4:
+                case ICONST_5:
+                case FCONST_0:
+                case FCONST_1:
+                case FCONST_2:
+                case F2L: // 1 before 2 after
+                case F2D:
+                case I2L:
+                case I2D:
+                    pushValue(OTHER);
+                    break;
+                case LCONST_0:
+                case LCONST_1:
+                case DCONST_0:
+                case DCONST_1:
+                    pushValue(OTHER);
+                    pushValue(OTHER);
+                    break;
+                case IALOAD: // remove 2 add 1
+                case FALOAD: // remove 2 add 1
+                case AALOAD: // remove 2 add 1
+                case BALOAD: // remove 2 add 1
+                case CALOAD: // remove 2 add 1
+                case SALOAD: // remove 2 add 1
+                case POP:
+                case IADD:
+                case FADD:
+                case ISUB:
+                case LSHL: // 3 before 2 after
+                case LSHR: // 3 before 2 after
+                case LUSHR: // 3 before 2 after
+                case L2I: // 2 before 1 after
+                case L2F: // 2 before 1 after
+                case D2I: // 2 before 1 after
+                case D2F: // 2 before 1 after
+                case FSUB:
+                case FMUL:
+                case FDIV:
+                case FREM:
+                case FCMPL: // 2 before 1 after
+                case FCMPG: // 2 before 1 after
+                case IMUL:
+                case IDIV:
+                case IREM:
+                case ISHL:
+                case ISHR:
+                case IUSHR:
+                case IAND:
+                case IOR:
+                case IXOR:
+                case MONITORENTER:
+                case MONITOREXIT:
+                    popValue();
+                    break;
+                case POP2:
+                case LSUB:
+                case LMUL:
+                case LDIV:
+                case LREM:
+                case LADD:
+                case LAND:
+                case LOR:
+                case LXOR:
+                case DADD:
+                case DMUL:
+                case DSUB:
+                case DDIV:
+                case DREM:
+                    popValue();
+                    popValue();
+                    break;
+                case IASTORE:
+                case FASTORE:
+                case AASTORE:
+                case BASTORE:
+                case CASTORE:
+                case SASTORE:
+                case LCMP: // 4 before 1 after
+                case DCMPL:
+                case DCMPG:
+                    popValue();
+                    popValue();
+                    popValue();
+                    break;
+                case LASTORE:
+                case DASTORE:
+                    popValue();
+                    popValue();
+                    popValue();
+                    popValue();
+                    break;
+                case DUP:
+                    pushValue(peekValue());
+                    break;
+                case DUP_X1:
+                    stackSize = stackFrame.size();
+                    stackFrame.add(stackSize - 2, stackFrame.get(stackSize - 1));
+                    break;
+                case DUP_X2:
+                    stackSize = stackFrame.size();
+                    stackFrame.add(stackSize - 3, stackFrame.get(stackSize - 1));
+                    break;
+                case DUP2:
+                    stackSize = stackFrame.size();
+                    stackFrame.add(stackSize - 2, stackFrame.get(stackSize - 1));
+                    stackFrame.add(stackSize - 2, stackFrame.get(stackSize - 1));
+                    break;
+                case DUP2_X1:
+                    stackSize = stackFrame.size();
+                    stackFrame.add(stackSize - 3, stackFrame.get(stackSize - 1));
+                    stackFrame.add(stackSize - 3, stackFrame.get(stackSize - 1));
+                    break;
+                case DUP2_X2:
+                    stackSize = stackFrame.size();
+                    stackFrame.add(stackSize - 4, stackFrame.get(stackSize - 1));
+                    stackFrame.add(stackSize - 4, stackFrame.get(stackSize - 1));
+                    break;
+                case SWAP:
+                    stackSize = stackFrame.size();
+                    stackFrame.add(stackSize - 2, stackFrame.get(stackSize - 1));
+                    stackFrame.remove(stackSize);
+                    break;
+                default:
+                    throw new IllegalArgumentException(INVALID_OPCODE + opcode);
+            }
+        } else {
+            switch (opcode) {
+                case RETURN:
+                case IRETURN:
+                case FRETURN:
+                case ARETURN:
+                case LRETURN:
+                case DRETURN:
+                case ATHROW:
+                    onMethodExit(opcode);
+                    break;
+                default:
+                    break;
+            }
+        }
+        super.visitInsn(opcode);
+    }
+
+    @Override
+    public void visitVarInsn(final int opcode, final int varIndex) {
+        super.visitVarInsn(opcode, varIndex);
+        if (isConstructor && !superClassConstructorCalled) {
+            switch (opcode) {
+                case ILOAD:
+                case FLOAD:
+                    pushValue(OTHER);
+                    break;
+                case LLOAD:
+                case DLOAD:
+                    pushValue(OTHER);
+                    pushValue(OTHER);
+                    break;
+                case ALOAD:
+                    pushValue(varIndex == 0 ? UNINITIALIZED_THIS : OTHER);
+                    break;
+                case ASTORE:
+                case ISTORE:
+                case FSTORE:
+                    popValue();
+                    break;
+                case LSTORE:
+                case DSTORE:
+                    popValue();
+                    popValue();
+                    break;
+                case RET:
+                    endConstructorBasicBlockWithoutSuccessor();
+                    break;
+                default:
+                    throw new IllegalArgumentException(INVALID_OPCODE + opcode);
+            }
+        }
+    }
+
+    @Override
+    public void visitFieldInsn(
+            final int opcode, final String owner, final String name, final String descriptor) {
+        super.visitFieldInsn(opcode, owner, name, descriptor);
+        if (isConstructor && !superClassConstructorCalled) {
+            char firstDescriptorChar = descriptor.charAt(0);
+            boolean longOrDouble = firstDescriptorChar == 'J' || firstDescriptorChar == 'D';
+            switch (opcode) {
+                case GETSTATIC:
+                    pushValue(OTHER);
+                    if (longOrDouble) {
+                        pushValue(OTHER);
+                    }
+                    break;
+                case PUTSTATIC:
+                    popValue();
+                    if (longOrDouble) {
+                        popValue();
+                    }
+                    break;
+                case PUTFIELD:
+                    popValue();
+                    popValue();
+                    if (longOrDouble) {
+                        popValue();
+                    }
+                    break;
+                case GETFIELD:
+                    if (longOrDouble) {
+                        pushValue(OTHER);
+                    }
+                    break;
+                default:
+                    throw new IllegalArgumentException(INVALID_OPCODE + opcode);
+            }
+        }
+    }
+
+    @Override
+    public void visitIntInsn(final int opcode, final int operand) {
+        super.visitIntInsn(opcode, operand);
+        if (isConstructor && !superClassConstructorCalled && opcode != NEWARRAY) {
+            pushValue(OTHER);
+        }
+    }
+
+    @Override
+    public void visitLdcInsn(final Object value) {
+        super.visitLdcInsn(value);
+        if (isConstructor && !superClassConstructorCalled) {
+            pushValue(OTHER);
+            if (value instanceof Double
+                    || value instanceof Long
+                    || (value instanceof ConstantDynamic && ((ConstantDynamic) value).getSize() == 2)) {
+                pushValue(OTHER);
+            }
+        }
+    }
+
+    @Override
+    public void visitMultiANewArrayInsn(final String descriptor, final int numDimensions) {
+        super.visitMultiANewArrayInsn(descriptor, numDimensions);
+        if (isConstructor && !superClassConstructorCalled) {
+            for (int i = 0; i < numDimensions; i++) {
+                popValue();
+            }
+            pushValue(OTHER);
+        }
+    }
+
+    @Override
+    public void visitTypeInsn(final int opcode, final String type) {
+        super.visitTypeInsn(opcode, type);
+        // ANEWARRAY, CHECKCAST or INSTANCEOF don't change stack.
+        if (isConstructor && !superClassConstructorCalled && opcode == NEW) {
+            pushValue(OTHER);
+        }
+    }
+
+    @Override
+    public void visitMethodInsn(
+            final int opcodeAndSource,
+            final String owner,
+            final String name,
+            final String descriptor,
+            final boolean isInterface) {
+        if (api < Opcodes.ASM5 && (opcodeAndSource & Opcodes.SOURCE_DEPRECATED) == 0) {
+            // Redirect the call to the deprecated version of this method.
+            super.visitMethodInsn(opcodeAndSource, owner, name, descriptor, isInterface);
+            return;
+        }
+        super.visitMethodInsn(opcodeAndSource, owner, name, descriptor, isInterface);
+        int opcode = opcodeAndSource & ~Opcodes.SOURCE_MASK;
+
+        doVisitMethodInsn(opcode, name, descriptor);
+    }
+
+    private void doVisitMethodInsn(final int opcode, final String name, final String descriptor) {
+        if (isConstructor && !superClassConstructorCalled) {
+            for (Type argumentType : Type.getArgumentTypes(descriptor)) {
+                popValue();
+                if (argumentType.getSize() == 2) {
+                    popValue();
+                }
+            }
+            switch (opcode) {
+                case INVOKEINTERFACE:
+                case INVOKEVIRTUAL:
+                    popValue();
+                    break;
+                case INVOKESPECIAL:
+                    Object value = popValue();
+                    if (value == UNINITIALIZED_THIS
+                            && !superClassConstructorCalled
+                            && name.equals("<init>")) {
+                        superClassConstructorCalled = true;
+                        onMethodEnter();
+                    }
+                    break;
+                default:
+                    break;
+            }
+
+            Type returnType = Type.getReturnType(descriptor);
+            if (returnType != Type.VOID_TYPE) {
+                pushValue(OTHER);
+                if (returnType.getSize() == 2) {
+                    pushValue(OTHER);
+                }
+            }
+        }
+    }
+
+    @Override
+    public void visitInvokeDynamicInsn(
+            final String name,
+            final String descriptor,
+            final Handle bootstrapMethodHandle,
+            final Object... bootstrapMethodArguments) {
+        super.visitInvokeDynamicInsn(name, descriptor, bootstrapMethodHandle, bootstrapMethodArguments);
+        doVisitMethodInsn(Opcodes.INVOKEDYNAMIC, name, descriptor);
+    }
+
+    @Override
+    public void visitJumpInsn(final int opcode, final Label label) {
+        super.visitJumpInsn(opcode, label);
+        if (isConstructor && !superClassConstructorCalled) {
+            switch (opcode) {
+                case IFEQ:
+                case IFNE:
+                case IFLT:
+                case IFGE:
+                case IFGT:
+                case IFLE:
+                case IFNULL:
+                case IFNONNULL:
+                    popValue();
+                    break;
+                case IF_ICMPEQ:
+                case IF_ICMPNE:
+                case IF_ICMPLT:
+                case IF_ICMPGE:
+                case IF_ICMPGT:
+                case IF_ICMPLE:
+                case IF_ACMPEQ:
+                case IF_ACMPNE:
+                    popValue();
+                    popValue();
+                    break;
+                case JSR:
+                    pushValue(OTHER);
+                    break;
+                case GOTO:
+                    endConstructorBasicBlockWithoutSuccessor();
+                    break;
+                default:
+                    break;
+            }
+            addForwardJump(label);
+        }
+    }
+
+    @Override
+    public void visitLookupSwitchInsn(final Label dflt, final int[] keys, final Label[] labels) {
+        super.visitLookupSwitchInsn(dflt, keys, labels);
+        if (isConstructor && !superClassConstructorCalled) {
+            popValue();
+            addForwardJumps(dflt, labels);
+            endConstructorBasicBlockWithoutSuccessor();
+        }
+    }
+
+    @Override
+    public void visitTableSwitchInsn(
+            final int min, final int max, final Label dflt, final Label... labels) {
+        super.visitTableSwitchInsn(min, max, dflt, labels);
+        if (isConstructor && !superClassConstructorCalled) {
+            popValue();
+            addForwardJumps(dflt, labels);
+            endConstructorBasicBlockWithoutSuccessor();
+        }
+    }
+
+    @Override
+    public void visitTryCatchBlock(
+            final Label start, final Label end, final Label handler, final String type) {
+        super.visitTryCatchBlock(start, end, handler, type);
+        // By definition of 'forwardJumpStackFrames', 'handler' should be pushed only if there is an
+        // instruction between 'start' and 'end' at which the super class constructor is not yet
+        // called. Unfortunately, try catch blocks must be visited before their labels, so we have no
+        // way to know this at this point. Instead, we suppose that the super class constructor has not
+        // been called at the start of *any* exception handler. If this is wrong, normally there should
+        // not be a second super class constructor call in the exception handler (an object can't be
+        // initialized twice), so this is not issue (in the sense that there is no risk to emit a wrong
+        // 'onMethodEnter').
+        if (isConstructor && !forwardJumpStackFrames.containsKey(handler)) {
+            List<Object> handlerStackFrame = new ArrayList<>();
+            handlerStackFrame.add(OTHER);
+            forwardJumpStackFrames.put(handler, handlerStackFrame);
+        }
+    }
+
+    private void addForwardJumps(final Label dflt, final Label[] labels) {
+        addForwardJump(dflt);
+        for (Label label : labels) {
+            addForwardJump(label);
+        }
+    }
+
+    private void addForwardJump(final Label label) {
+        if (forwardJumpStackFrames.containsKey(label)) {
+            return;
+        }
+        forwardJumpStackFrames.put(label, new ArrayList<>(stackFrame));
+    }
+
+    private void endConstructorBasicBlockWithoutSuccessor() {
+        // The next instruction is not reachable from this instruction. If it is dead code, we
+        // should not try to simulate stack operations, and there is no need to insert advices
+        // here. If it is reachable with a backward jump, the only possible case is that the super
+        // class constructor has already been called (backward jumps are forbidden before it is
+        // called). If it is reachable with a forward jump, there are two sub-cases. Either the
+        // super class constructor has already been called when reaching the next instruction, or
+        // it has not been called. But in this case there must be a forwardJumpStackFrames entry
+        // for a Label designating the next instruction, and superClassConstructorCalled will be
+        // reset to false there. We can therefore always reset this field to true here.
+        superClassConstructorCalled = true;
+    }
+
+    private Object popValue() {
+        return stackFrame.remove(stackFrame.size() - 1);
+    }
+
+    private Object peekValue() {
+        return stackFrame.get(stackFrame.size() - 1);
+    }
+
+    private void pushValue(final Object value) {
+        stackFrame.add(value);
+    }
+
+    /**
+      * Generates the "before" advice for the visited method. The default implementation of this method
+      * does nothing. Subclasses can use or change all the local variables, but should not change state
+      * of the stack. This method is called at the beginning of the method or after super class
+      * constructor has been called (in constructors).
+      */
+    protected void onMethodEnter() {}
+
+    /**
+      * Generates the "after" advice for the visited method. The default implementation of this method
+      * does nothing. Subclasses can use or change all the local variables, but should not change state
+      * of the stack. This method is called at the end of the method, just before return and athrow
+      * instructions. The top element on the stack contains the return value or the exception instance.
+      * For example:
+      *
+      * <pre>
+      * public void onMethodExit(final int opcode) {
+      *   if (opcode == RETURN) {
+      *     visitInsn(ACONST_NULL);
+      *   } else if (opcode == ARETURN || opcode == ATHROW) {
+      *     dup();
+      *   } else {
+      *     if (opcode == LRETURN || opcode == DRETURN) {
+      *       dup2();
+      *     } else {
+      *       dup();
+      *     }
+      *     box(Type.getReturnType(this.methodDesc));
+      *   }
+      *   visitIntInsn(SIPUSH, opcode);
+      *   visitMethodInsn(INVOKESTATIC, owner, "onExit", "(Ljava/lang/Object;I)V");
+      * }
+      *
+      * // An actual call back method.
+      * public static void onExit(final Object exitValue, final int opcode) {
+      *   ...
+      * }
+      * </pre>
+      *
+      * @param opcode one of {@link Opcodes#RETURN}, {@link Opcodes#IRETURN}, {@link Opcodes#FRETURN},
+      *     {@link Opcodes#ARETURN}, {@link Opcodes#LRETURN}, {@link Opcodes#DRETURN} or {@link
+      *     Opcodes#ATHROW}.
+      */
+    protected void onMethodExit(final int opcode) {}
+}
diff --git a/tests/test_data/std/jdk/internal/org/objectweb/asm/commons/AnalyzerAdapter.class b/tests/test_data/std/jdk/internal/org/objectweb/asm/commons/AnalyzerAdapter.class
new file mode 100644
index 0000000000000000000000000000000000000000..9e8343973c2897d2cfca4a0cd395390d64db2260
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/org/objectweb/asm/commons/AnalyzerAdapter.java b/tests/test_data/std/jdk/internal/org/objectweb/asm/commons/AnalyzerAdapter.java
new file mode 100644
index 00000000..36a5a06d
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/org/objectweb/asm/commons/AnalyzerAdapter.java
@@ -0,0 +1,942 @@
+/*
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/*
+ * This file is available under and governed by the GNU General Public
+ * License version 2 only, as published by the Free Software Foundation.
+ * However, the following notice accompanied the original version of this
+ * file:
+ *
+ * ASM: a very small and fast Java bytecode manipulation framework
+ * Copyright (c) 2000-2011 INRIA, France Telecom
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the copyright holders nor the names of its
+ *    contributors may be used to endorse or promote products derived from
+ *    this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+package jdk.internal.org.objectweb.asm.commons;
+
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import jdk.internal.org.objectweb.asm.ConstantDynamic;
+import jdk.internal.org.objectweb.asm.Handle;
+import jdk.internal.org.objectweb.asm.Label;
+import jdk.internal.org.objectweb.asm.MethodVisitor;
+import jdk.internal.org.objectweb.asm.Opcodes;
+import jdk.internal.org.objectweb.asm.Type;
+
+/**
+ * A {@link MethodVisitor} that keeps track of stack map frame changes between {@link
+ * #visitFrame(int, int, Object[], int, Object[])} calls. This adapter must be used with the {@link
+ * jdk.internal.org.objectweb.asm.ClassReader#EXPAND_FRAMES} option. Each visit<i>X</i> instruction delegates to
+ * the next visitor in the chain, if any, and then simulates the effect of this instruction on the
+ * stack map frame, represented by {@link #locals} and {@link #stack}. The next visitor in the chain
+ * can get the state of the stack map frame <i>before</i> each instruction by reading the value of
+ * these fields in its visit<i>X</i> methods (this requires a reference to the AnalyzerAdapter that
+ * is before it in the chain). If this adapter is used with a class that does not contain stack map
+ * table attributes (i.e., pre Java 6 classes) then this adapter may not be able to compute the
+ * stack map frame for each instruction. In this case no exception is thrown but the {@link #locals}
+ * and {@link #stack} fields will be null for these instructions.
+ *
+ * @author Eric Bruneton
+ */
+public class AnalyzerAdapter extends MethodVisitor {
+
+    /**
+      * The local variable slots for the current execution frame. Primitive types are represented by
+      * {@link Opcodes#TOP}, {@link Opcodes#INTEGER}, {@link Opcodes#FLOAT}, {@link Opcodes#LONG},
+      * {@link Opcodes#DOUBLE},{@link Opcodes#NULL} or {@link Opcodes#UNINITIALIZED_THIS} (long and
+      * double are represented by two elements, the second one being TOP). Reference types are
+      * represented by String objects (representing internal names, see {@link
+      * Type#getInternalName()}), and uninitialized types by Label objects (this label designates the
+      * NEW instruction that created this uninitialized value). This field is {@literal null} for
+      * unreachable instructions.
+      */
+    public List<Object> locals;
+
+    /**
+      * The operand stack slots for the current execution frame. Primitive types are represented by
+      * {@link Opcodes#TOP}, {@link Opcodes#INTEGER}, {@link Opcodes#FLOAT}, {@link Opcodes#LONG},
+      * {@link Opcodes#DOUBLE},{@link Opcodes#NULL} or {@link Opcodes#UNINITIALIZED_THIS} (long and
+      * double are represented by two elements, the second one being TOP). Reference types are
+      * represented by String objects (representing internal names, see {@link
+      * Type#getInternalName()}), and uninitialized types by Label objects (this label designates the
+      * NEW instruction that created this uninitialized value). This field is {@literal null} for
+      * unreachable instructions.
+      */
+    public List<Object> stack;
+
+    /** The labels that designate the next instruction to be visited. May be {@literal null}. */
+    private List<Label> labels;
+
+    /**
+      * The uninitialized types in the current execution frame. This map associates internal names to
+      * Label objects (see {@link Type#getInternalName()}). Each label designates a NEW instruction
+      * that created the currently uninitialized types, and the associated internal name represents the
+      * NEW operand, i.e. the final, initialized type value.
+      */
+    public Map<Object, Object> uninitializedTypes;
+
+    /** The maximum stack size of this method. */
+    private int maxStack;
+
+    /** The maximum number of local variables of this method. */
+    private int maxLocals;
+
+    /** The owner's class name. */
+    private String owner;
+
+    /**
+      * Constructs a new {@link AnalyzerAdapter}. <i>Subclasses must not use this constructor</i>.
+      * Instead, they must use the {@link #AnalyzerAdapter(int, String, int, String, String,
+      * MethodVisitor)} version.
+      *
+      * @param owner the owner's class name.
+      * @param access the method's access flags (see {@link Opcodes}).
+      * @param name the method's name.
+      * @param descriptor the method's descriptor (see {@link Type}).
+      * @param methodVisitor the method visitor to which this adapter delegates calls. May be {@literal
+      *     null}.
+      * @throws IllegalStateException If a subclass calls this constructor.
+      */
+    public AnalyzerAdapter(
+            final String owner,
+            final int access,
+            final String name,
+            final String descriptor,
+            final MethodVisitor methodVisitor) {
+        this(/* latest api = */ Opcodes.ASM9, owner, access, name, descriptor, methodVisitor);
+        if (getClass() != AnalyzerAdapter.class) {
+            throw new IllegalStateException();
+        }
+    }
+
+    /**
+      * Constructs a new {@link AnalyzerAdapter}.
+      *
+      * @param api the ASM API version implemented by this visitor. Must be one of the {@code
+      *     ASM}<i>x</i> values in {@link Opcodes}.
+      * @param owner the owner's class name.
+      * @param access the method's access flags (see {@link Opcodes}).
+      * @param name the method's name.
+      * @param descriptor the method's descriptor (see {@link Type}).
+      * @param methodVisitor the method visitor to which this adapter delegates calls. May be {@literal
+      *     null}.
+      */
+    protected AnalyzerAdapter(
+            final int api,
+            final String owner,
+            final int access,
+            final String name,
+            final String descriptor,
+            final MethodVisitor methodVisitor) {
+        super(api, methodVisitor);
+        this.owner = owner;
+        locals = new ArrayList<>();
+        stack = new ArrayList<>();
+        uninitializedTypes = new HashMap<>();
+
+        if ((access & Opcodes.ACC_STATIC) == 0) {
+            if ("<init>".equals(name)) {
+                locals.add(Opcodes.UNINITIALIZED_THIS);
+            } else {
+                locals.add(owner);
+            }
+        }
+        for (Type argumentType : Type.getArgumentTypes(descriptor)) {
+            switch (argumentType.getSort()) {
+                case Type.BOOLEAN:
+                case Type.CHAR:
+                case Type.BYTE:
+                case Type.SHORT:
+                case Type.INT:
+                    locals.add(Opcodes.INTEGER);
+                    break;
+                case Type.FLOAT:
+                    locals.add(Opcodes.FLOAT);
+                    break;
+                case Type.LONG:
+                    locals.add(Opcodes.LONG);
+                    locals.add(Opcodes.TOP);
+                    break;
+                case Type.DOUBLE:
+                    locals.add(Opcodes.DOUBLE);
+                    locals.add(Opcodes.TOP);
+                    break;
+                case Type.ARRAY:
+                    locals.add(argumentType.getDescriptor());
+                    break;
+                case Type.OBJECT:
+                    locals.add(argumentType.getInternalName());
+                    break;
+                default:
+                    throw new AssertionError();
+            }
+        }
+        maxLocals = locals.size();
+    }
+
+    @Override
+    public void visitFrame(
+            final int type,
+            final int numLocal,
+            final Object[] local,
+            final int numStack,
+            final Object[] stack) {
+        if (type != Opcodes.F_NEW) { // Uncompressed frame.
+            throw new IllegalArgumentException(
+                    "AnalyzerAdapter only accepts expanded frames (see ClassReader.EXPAND_FRAMES)");
+        }
+
+        super.visitFrame(type, numLocal, local, numStack, stack);
+
+        if (this.locals != null) {
+            this.locals.clear();
+            this.stack.clear();
+        } else {
+            this.locals = new ArrayList<>();
+            this.stack = new ArrayList<>();
+        }
+        visitFrameTypes(numLocal, local, this.locals);
+        visitFrameTypes(numStack, stack, this.stack);
+        maxLocals = Math.max(maxLocals, this.locals.size());
+        maxStack = Math.max(maxStack, this.stack.size());
+    }
+
+    private static void visitFrameTypes(
+            final int numTypes, final Object[] frameTypes, final List<Object> result) {
+        for (int i = 0; i < numTypes; ++i) {
+            Object frameType = frameTypes[i];
+            result.add(frameType);
+            if (frameType == Opcodes.LONG || frameType == Opcodes.DOUBLE) {
+                result.add(Opcodes.TOP);
+            }
+        }
+    }
+
+    @Override
+    public void visitInsn(final int opcode) {
+        super.visitInsn(opcode);
+        execute(opcode, 0, null);
+        if ((opcode >= Opcodes.IRETURN && opcode <= Opcodes.RETURN) || opcode == Opcodes.ATHROW) {
+            this.locals = null;
+            this.stack = null;
+        }
+    }
+
+    @Override
+    public void visitIntInsn(final int opcode, final int operand) {
+        super.visitIntInsn(opcode, operand);
+        execute(opcode, operand, null);
+    }
+
+    @Override
+    public void visitVarInsn(final int opcode, final int varIndex) {
+        super.visitVarInsn(opcode, varIndex);
+        boolean isLongOrDouble =
+                opcode == Opcodes.LLOAD
+                        || opcode == Opcodes.DLOAD
+                        || opcode == Opcodes.LSTORE
+                        || opcode == Opcodes.DSTORE;
+        maxLocals = Math.max(maxLocals, varIndex + (isLongOrDouble ? 2 : 1));
+        execute(opcode, varIndex, null);
+    }
+
+    @Override
+    public void visitTypeInsn(final int opcode, final String type) {
+        if (opcode == Opcodes.NEW) {
+            if (labels == null) {
+                Label label = new Label();
+                labels = new ArrayList<>(3);
+                labels.add(label);
+                if (mv != null) {
+                    mv.visitLabel(label);
+                }
+            }
+            for (Label label : labels) {
+                uninitializedTypes.put(label, type);
+            }
+        }
+        super.visitTypeInsn(opcode, type);
+        execute(opcode, 0, type);
+    }
+
+    @Override
+    public void visitFieldInsn(
+            final int opcode, final String owner, final String name, final String descriptor) {
+        super.visitFieldInsn(opcode, owner, name, descriptor);
+        execute(opcode, 0, descriptor);
+    }
+
+    @Override
+    public void visitMethodInsn(
+            final int opcodeAndSource,
+            final String owner,
+            final String name,
+            final String descriptor,
+            final boolean isInterface) {
+        if (api < Opcodes.ASM5 && (opcodeAndSource & Opcodes.SOURCE_DEPRECATED) == 0) {
+            // Redirect the call to the deprecated version of this method.
+            super.visitMethodInsn(opcodeAndSource, owner, name, descriptor, isInterface);
+            return;
+        }
+        super.visitMethodInsn(opcodeAndSource, owner, name, descriptor, isInterface);
+        int opcode = opcodeAndSource & ~Opcodes.SOURCE_MASK;
+
+        if (this.locals == null) {
+            labels = null;
+            return;
+        }
+        pop(descriptor);
+        if (opcode != Opcodes.INVOKESTATIC) {
+            Object value = pop();
+            if (opcode == Opcodes.INVOKESPECIAL && name.equals("<init>")) {
+                Object initializedValue;
+                if (value == Opcodes.UNINITIALIZED_THIS) {
+                    initializedValue = this.owner;
+                } else {
+                    initializedValue = owner;
+                }
+                for (int i = 0; i < locals.size(); ++i) {
+                    if (locals.get(i) == value) {
+                        locals.set(i, initializedValue);
+                    }
+                }
+                for (int i = 0; i < stack.size(); ++i) {
+                    if (stack.get(i) == value) {
+                        stack.set(i, initializedValue);
+                    }
+                }
+            }
+        }
+        pushDescriptor(descriptor);
+        labels = null;
+    }
+
+    @Override
+    public void visitInvokeDynamicInsn(
+            final String name,
+            final String descriptor,
+            final Handle bootstrapMethodHandle,
+            final Object... bootstrapMethodArguments) {
+        super.visitInvokeDynamicInsn(name, descriptor, bootstrapMethodHandle, bootstrapMethodArguments);
+        if (this.locals == null) {
+            labels = null;
+            return;
+        }
+        pop(descriptor);
+        pushDescriptor(descriptor);
+        labels = null;
+    }
+
+    @Override
+    public void visitJumpInsn(final int opcode, final Label label) {
+        super.visitJumpInsn(opcode, label);
+        execute(opcode, 0, null);
+        if (opcode == Opcodes.GOTO) {
+            this.locals = null;
+            this.stack = null;
+        }
+    }
+
+    @Override
+    public void visitLabel(final Label label) {
+        super.visitLabel(label);
+        if (labels == null) {
+            labels = new ArrayList<>(3);
+        }
+        labels.add(label);
+    }
+
+    @Override
+    public void visitLdcInsn(final Object value) {
+        super.visitLdcInsn(value);
+        if (this.locals == null) {
+            labels = null;
+            return;
+        }
+        if (value instanceof Integer) {
+            push(Opcodes.INTEGER);
+        } else if (value instanceof Long) {
+            push(Opcodes.LONG);
+            push(Opcodes.TOP);
+        } else if (value instanceof Float) {
+            push(Opcodes.FLOAT);
+        } else if (value instanceof Double) {
+            push(Opcodes.DOUBLE);
+            push(Opcodes.TOP);
+        } else if (value instanceof String) {
+            push("java/lang/String");
+        } else if (value instanceof Type) {
+            int sort = ((Type) value).getSort();
+            if (sort == Type.OBJECT || sort == Type.ARRAY) {
+                push("java/lang/Class");
+            } else if (sort == Type.METHOD) {
+                push("java/lang/invoke/MethodType");
+            } else {
+                throw new IllegalArgumentException();
+            }
+        } else if (value instanceof Handle) {
+            push("java/lang/invoke/MethodHandle");
+        } else if (value instanceof ConstantDynamic) {
+            pushDescriptor(((ConstantDynamic) value).getDescriptor());
+        } else {
+            throw new IllegalArgumentException();
+        }
+        labels = null;
+    }
+
+    @Override
+    public void visitIincInsn(final int varIndex, final int increment) {
+        super.visitIincInsn(varIndex, increment);
+        maxLocals = Math.max(maxLocals, varIndex + 1);
+        execute(Opcodes.IINC, varIndex, null);
+    }
+
+    @Override
+    public void visitTableSwitchInsn(
+            final int min, final int max, final Label dflt, final Label... labels) {
+        super.visitTableSwitchInsn(min, max, dflt, labels);
+        execute(Opcodes.TABLESWITCH, 0, null);
+        this.locals = null;
+        this.stack = null;
+    }
+
+    @Override
+    public void visitLookupSwitchInsn(final Label dflt, final int[] keys, final Label[] labels) {
+        super.visitLookupSwitchInsn(dflt, keys, labels);
+        execute(Opcodes.LOOKUPSWITCH, 0, null);
+        this.locals = null;
+        this.stack = null;
+    }
+
+    @Override
+    public void visitMultiANewArrayInsn(final String descriptor, final int numDimensions) {
+        super.visitMultiANewArrayInsn(descriptor, numDimensions);
+        execute(Opcodes.MULTIANEWARRAY, numDimensions, descriptor);
+    }
+
+    @Override
+    public void visitLocalVariable(
+            final String name,
+            final String descriptor,
+            final String signature,
+            final Label start,
+            final Label end,
+            final int index) {
+        char firstDescriptorChar = descriptor.charAt(0);
+        maxLocals =
+                Math.max(
+                        maxLocals, index + (firstDescriptorChar == 'J' || firstDescriptorChar == 'D' ? 2 : 1));
+        super.visitLocalVariable(name, descriptor, signature, start, end, index);
+    }
+
+    @Override
+    public void visitMaxs(final int maxStack, final int maxLocals) {
+        if (mv != null) {
+            this.maxStack = Math.max(this.maxStack, maxStack);
+            this.maxLocals = Math.max(this.maxLocals, maxLocals);
+            mv.visitMaxs(this.maxStack, this.maxLocals);
+        }
+    }
+
+    // -----------------------------------------------------------------------------------------------
+
+    private Object get(final int local) {
+        maxLocals = Math.max(maxLocals, local + 1);
+        return local < locals.size() ? locals.get(local) : Opcodes.TOP;
+    }
+
+    private void set(final int local, final Object type) {
+        maxLocals = Math.max(maxLocals, local + 1);
+        while (local >= locals.size()) {
+            locals.add(Opcodes.TOP);
+        }
+        locals.set(local, type);
+    }
+
+    private void push(final Object type) {
+        stack.add(type);
+        maxStack = Math.max(maxStack, stack.size());
+    }
+
+    private void pushDescriptor(final String fieldOrMethodDescriptor) {
+        String descriptor =
+                fieldOrMethodDescriptor.charAt(0) == '('
+                        ? Type.getReturnType(fieldOrMethodDescriptor).getDescriptor()
+                        : fieldOrMethodDescriptor;
+        switch (descriptor.charAt(0)) {
+            case 'V':
+                return;
+            case 'Z':
+            case 'C':
+            case 'B':
+            case 'S':
+            case 'I':
+                push(Opcodes.INTEGER);
+                return;
+            case 'F':
+                push(Opcodes.FLOAT);
+                return;
+            case 'J':
+                push(Opcodes.LONG);
+                push(Opcodes.TOP);
+                return;
+            case 'D':
+                push(Opcodes.DOUBLE);
+                push(Opcodes.TOP);
+                return;
+            case '[':
+                push(descriptor);
+                break;
+            case 'L':
+                push(descriptor.substring(1, descriptor.length() - 1));
+                break;
+            default:
+                throw new AssertionError();
+        }
+    }
+
+    private Object pop() {
+        return stack.remove(stack.size() - 1);
+    }
+
+    private void pop(final int numSlots) {
+        int size = stack.size();
+        int end = size - numSlots;
+        for (int i = size - 1; i >= end; --i) {
+            stack.remove(i);
+        }
+    }
+
+    private void pop(final String descriptor) {
+        char firstDescriptorChar = descriptor.charAt(0);
+        if (firstDescriptorChar == '(') {
+            int numSlots = 0;
+            Type[] types = Type.getArgumentTypes(descriptor);
+            for (Type type : types) {
+                numSlots += type.getSize();
+            }
+            pop(numSlots);
+        } else if (firstDescriptorChar == 'J' || firstDescriptorChar == 'D') {
+            pop(2);
+        } else {
+            pop(1);
+        }
+    }
+
+    private void execute(final int opcode, final int intArg, final String stringArg) {
+        if (opcode == Opcodes.JSR || opcode == Opcodes.RET) {
+            throw new IllegalArgumentException("JSR/RET are not supported");
+        }
+        if (this.locals == null) {
+            labels = null;
+            return;
+        }
+        Object value1;
+        Object value2;
+        Object value3;
+        Object t4;
+        switch (opcode) {
+            case Opcodes.NOP:
+            case Opcodes.INEG:
+            case Opcodes.LNEG:
+            case Opcodes.FNEG:
+            case Opcodes.DNEG:
+            case Opcodes.I2B:
+            case Opcodes.I2C:
+            case Opcodes.I2S:
+            case Opcodes.GOTO:
+            case Opcodes.RETURN:
+                break;
+            case Opcodes.ACONST_NULL:
+                push(Opcodes.NULL);
+                break;
+            case Opcodes.ICONST_M1:
+            case Opcodes.ICONST_0:
+            case Opcodes.ICONST_1:
+            case Opcodes.ICONST_2:
+            case Opcodes.ICONST_3:
+            case Opcodes.ICONST_4:
+            case Opcodes.ICONST_5:
+            case Opcodes.BIPUSH:
+            case Opcodes.SIPUSH:
+                push(Opcodes.INTEGER);
+                break;
+            case Opcodes.LCONST_0:
+            case Opcodes.LCONST_1:
+                push(Opcodes.LONG);
+                push(Opcodes.TOP);
+                break;
+            case Opcodes.FCONST_0:
+            case Opcodes.FCONST_1:
+            case Opcodes.FCONST_2:
+                push(Opcodes.FLOAT);
+                break;
+            case Opcodes.DCONST_0:
+            case Opcodes.DCONST_1:
+                push(Opcodes.DOUBLE);
+                push(Opcodes.TOP);
+                break;
+            case Opcodes.ILOAD:
+            case Opcodes.FLOAD:
+            case Opcodes.ALOAD:
+                push(get(intArg));
+                break;
+            case Opcodes.LLOAD:
+            case Opcodes.DLOAD:
+                push(get(intArg));
+                push(Opcodes.TOP);
+                break;
+            case Opcodes.LALOAD:
+            case Opcodes.D2L:
+                pop(2);
+                push(Opcodes.LONG);
+                push(Opcodes.TOP);
+                break;
+            case Opcodes.DALOAD:
+            case Opcodes.L2D:
+                pop(2);
+                push(Opcodes.DOUBLE);
+                push(Opcodes.TOP);
+                break;
+            case Opcodes.AALOAD:
+                pop(1);
+                value1 = pop();
+                if (value1 instanceof String) {
+                    pushDescriptor(((String) value1).substring(1));
+                } else if (value1 == Opcodes.NULL) {
+                    push(value1);
+                } else {
+                    push("java/lang/Object");
+                }
+                break;
+            case Opcodes.ISTORE:
+            case Opcodes.FSTORE:
+            case Opcodes.ASTORE:
+                value1 = pop();
+                set(intArg, value1);
+                if (intArg > 0) {
+                    value2 = get(intArg - 1);
+                    if (value2 == Opcodes.LONG || value2 == Opcodes.DOUBLE) {
+                        set(intArg - 1, Opcodes.TOP);
+                    }
+                }
+                break;
+            case Opcodes.LSTORE:
+            case Opcodes.DSTORE:
+                pop(1);
+                value1 = pop();
+                set(intArg, value1);
+                set(intArg + 1, Opcodes.TOP);
+                if (intArg > 0) {
+                    value2 = get(intArg - 1);
+                    if (value2 == Opcodes.LONG || value2 == Opcodes.DOUBLE) {
+                        set(intArg - 1, Opcodes.TOP);
+                    }
+                }
+                break;
+            case Opcodes.IASTORE:
+            case Opcodes.BASTORE:
+            case Opcodes.CASTORE:
+            case Opcodes.SASTORE:
+            case Opcodes.FASTORE:
+            case Opcodes.AASTORE:
+                pop(3);
+                break;
+            case Opcodes.LASTORE:
+            case Opcodes.DASTORE:
+                pop(4);
+                break;
+            case Opcodes.POP:
+            case Opcodes.IFEQ:
+            case Opcodes.IFNE:
+            case Opcodes.IFLT:
+            case Opcodes.IFGE:
+            case Opcodes.IFGT:
+            case Opcodes.IFLE:
+            case Opcodes.IRETURN:
+            case Opcodes.FRETURN:
+            case Opcodes.ARETURN:
+            case Opcodes.TABLESWITCH:
+            case Opcodes.LOOKUPSWITCH:
+            case Opcodes.ATHROW:
+            case Opcodes.MONITORENTER:
+            case Opcodes.MONITOREXIT:
+            case Opcodes.IFNULL:
+            case Opcodes.IFNONNULL:
+                pop(1);
+                break;
+            case Opcodes.POP2:
+            case Opcodes.IF_ICMPEQ:
+            case Opcodes.IF_ICMPNE:
+            case Opcodes.IF_ICMPLT:
+            case Opcodes.IF_ICMPGE:
+            case Opcodes.IF_ICMPGT:
+            case Opcodes.IF_ICMPLE:
+            case Opcodes.IF_ACMPEQ:
+            case Opcodes.IF_ACMPNE:
+            case Opcodes.LRETURN:
+            case Opcodes.DRETURN:
+                pop(2);
+                break;
+            case Opcodes.DUP:
+                value1 = pop();
+                push(value1);
+                push(value1);
+                break;
+            case Opcodes.DUP_X1:
+                value1 = pop();
+                value2 = pop();
+                push(value1);
+                push(value2);
+                push(value1);
+                break;
+            case Opcodes.DUP_X2:
+                value1 = pop();
+                value2 = pop();
+                value3 = pop();
+                push(value1);
+                push(value3);
+                push(value2);
+                push(value1);
+                break;
+            case Opcodes.DUP2:
+                value1 = pop();
+                value2 = pop();
+                push(value2);
+                push(value1);
+                push(value2);
+                push(value1);
+                break;
+            case Opcodes.DUP2_X1:
+                value1 = pop();
+                value2 = pop();
+                value3 = pop();
+                push(value2);
+                push(value1);
+                push(value3);
+                push(value2);
+                push(value1);
+                break;
+            case Opcodes.DUP2_X2:
+                value1 = pop();
+                value2 = pop();
+                value3 = pop();
+                t4 = pop();
+                push(value2);
+                push(value1);
+                push(t4);
+                push(value3);
+                push(value2);
+                push(value1);
+                break;
+            case Opcodes.SWAP:
+                value1 = pop();
+                value2 = pop();
+                push(value1);
+                push(value2);
+                break;
+            case Opcodes.IALOAD:
+            case Opcodes.BALOAD:
+            case Opcodes.CALOAD:
+            case Opcodes.SALOAD:
+            case Opcodes.IADD:
+            case Opcodes.ISUB:
+            case Opcodes.IMUL:
+            case Opcodes.IDIV:
+            case Opcodes.IREM:
+            case Opcodes.IAND:
+            case Opcodes.IOR:
+            case Opcodes.IXOR:
+            case Opcodes.ISHL:
+            case Opcodes.ISHR:
+            case Opcodes.IUSHR:
+            case Opcodes.L2I:
+            case Opcodes.D2I:
+            case Opcodes.FCMPL:
+            case Opcodes.FCMPG:
+                pop(2);
+                push(Opcodes.INTEGER);
+                break;
+            case Opcodes.LADD:
+            case Opcodes.LSUB:
+            case Opcodes.LMUL:
+            case Opcodes.LDIV:
+            case Opcodes.LREM:
+            case Opcodes.LAND:
+            case Opcodes.LOR:
+            case Opcodes.LXOR:
+                pop(4);
+                push(Opcodes.LONG);
+                push(Opcodes.TOP);
+                break;
+            case Opcodes.FALOAD:
+            case Opcodes.FADD:
+            case Opcodes.FSUB:
+            case Opcodes.FMUL:
+            case Opcodes.FDIV:
+            case Opcodes.FREM:
+            case Opcodes.L2F:
+            case Opcodes.D2F:
+                pop(2);
+                push(Opcodes.FLOAT);
+                break;
+            case Opcodes.DADD:
+            case Opcodes.DSUB:
+            case Opcodes.DMUL:
+            case Opcodes.DDIV:
+            case Opcodes.DREM:
+                pop(4);
+                push(Opcodes.DOUBLE);
+                push(Opcodes.TOP);
+                break;
+            case Opcodes.LSHL:
+            case Opcodes.LSHR:
+            case Opcodes.LUSHR:
+                pop(3);
+                push(Opcodes.LONG);
+                push(Opcodes.TOP);
+                break;
+            case Opcodes.IINC:
+                set(intArg, Opcodes.INTEGER);
+                break;
+            case Opcodes.I2L:
+            case Opcodes.F2L:
+                pop(1);
+                push(Opcodes.LONG);
+                push(Opcodes.TOP);
+                break;
+            case Opcodes.I2F:
+                pop(1);
+                push(Opcodes.FLOAT);
+                break;
+            case Opcodes.I2D:
+            case Opcodes.F2D:
+                pop(1);
+                push(Opcodes.DOUBLE);
+                push(Opcodes.TOP);
+                break;
+            case Opcodes.F2I:
+            case Opcodes.ARRAYLENGTH:
+            case Opcodes.INSTANCEOF:
+                pop(1);
+                push(Opcodes.INTEGER);
+                break;
+            case Opcodes.LCMP:
+            case Opcodes.DCMPL:
+            case Opcodes.DCMPG:
+                pop(4);
+                push(Opcodes.INTEGER);
+                break;
+            case Opcodes.GETSTATIC:
+                pushDescriptor(stringArg);
+                break;
+            case Opcodes.PUTSTATIC:
+                pop(stringArg);
+                break;
+            case Opcodes.GETFIELD:
+                pop(1);
+                pushDescriptor(stringArg);
+                break;
+            case Opcodes.PUTFIELD:
+                pop(stringArg);
+                pop();
+                break;
+            case Opcodes.NEW:
+                push(labels.get(0));
+                break;
+            case Opcodes.NEWARRAY:
+                pop();
+                switch (intArg) {
+                    case Opcodes.T_BOOLEAN:
+                        pushDescriptor("[Z");
+                        break;
+                    case Opcodes.T_CHAR:
+                        pushDescriptor("[C");
+                        break;
+                    case Opcodes.T_BYTE:
+                        pushDescriptor("[B");
+                        break;
+                    case Opcodes.T_SHORT:
+                        pushDescriptor("[S");
+                        break;
+                    case Opcodes.T_INT:
+                        pushDescriptor("[I");
+                        break;
+                    case Opcodes.T_FLOAT:
+                        pushDescriptor("[F");
+                        break;
+                    case Opcodes.T_DOUBLE:
+                        pushDescriptor("[D");
+                        break;
+                    case Opcodes.T_LONG:
+                        pushDescriptor("[J");
+                        break;
+                    default:
+                        throw new IllegalArgumentException("Invalid array type " + intArg);
+                }
+                break;
+            case Opcodes.ANEWARRAY:
+                pop();
+                pushDescriptor("[" + Type.getObjectType(stringArg));
+                break;
+            case Opcodes.CHECKCAST:
+                pop();
+                pushDescriptor(Type.getObjectType(stringArg).getDescriptor());
+                break;
+            case Opcodes.MULTIANEWARRAY:
+                pop(intArg);
+                pushDescriptor(stringArg);
+                break;
+            default:
+                throw new IllegalArgumentException("Invalid opcode " + opcode);
+        }
+        labels = null;
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/org/objectweb/asm/commons/AnnotationRemapper.class b/tests/test_data/std/jdk/internal/org/objectweb/asm/commons/AnnotationRemapper.class
new file mode 100644
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diff --git a/tests/test_data/std/jdk/internal/org/objectweb/asm/commons/AnnotationRemapper.java b/tests/test_data/std/jdk/internal/org/objectweb/asm/commons/AnnotationRemapper.java
new file mode 100644
index 00000000..4fdfbccc
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/org/objectweb/asm/commons/AnnotationRemapper.java
@@ -0,0 +1,241 @@
+/*
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/*
+ * This file is available under and governed by the GNU General Public
+ * License version 2 only, as published by the Free Software Foundation.
+ * However, the following notice accompanied the original version of this
+ * file:
+ *
+ * ASM: a very small and fast Java bytecode manipulation framework
+ * Copyright (c) 2000-2011 INRIA, France Telecom
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the copyright holders nor the names of its
+ *    contributors may be used to endorse or promote products derived from
+ *    this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+package jdk.internal.org.objectweb.asm.commons;
+
+import jdk.internal.org.objectweb.asm.AnnotationVisitor;
+import jdk.internal.org.objectweb.asm.Opcodes;
+
+/**
+ * An {@link AnnotationVisitor} that remaps types with a {@link Remapper}.
+ *
+ * @author Eugene Kuleshov
+ */
+public class AnnotationRemapper extends AnnotationVisitor {
+
+    /**
+      * The descriptor of the visited annotation. May be {@literal null}, for instance for
+      * AnnotationDefault.
+      */
+    protected final String descriptor;
+
+    /** The remapper used to remap the types in the visited annotation. */
+    protected final Remapper remapper;
+
+    /**
+      * Constructs a new {@link AnnotationRemapper}. <i>Subclasses must not use this constructor</i>.
+      * Instead, they must use the {@link #AnnotationRemapper(int,AnnotationVisitor,Remapper)} version.
+      *
+      * @param annotationVisitor the annotation visitor this remapper must delegate to.
+      * @param remapper the remapper to use to remap the types in the visited annotation.
+      * @deprecated use {@link #AnnotationRemapper(String, AnnotationVisitor, Remapper)} instead.
+      */
+    @Deprecated
+    public AnnotationRemapper(final AnnotationVisitor annotationVisitor, final Remapper remapper) {
+        this(/* descriptor = */ null, annotationVisitor, remapper);
+    }
+
+    /**
+      * Constructs a new {@link AnnotationRemapper}. <i>Subclasses must not use this constructor</i>.
+      * Instead, they must use the {@link #AnnotationRemapper(int,String,AnnotationVisitor,Remapper)}
+      * version.
+      *
+      * @param descriptor the descriptor of the visited annotation. May be {@literal null}.
+      * @param annotationVisitor the annotation visitor this remapper must delegate to.
+      * @param remapper the remapper to use to remap the types in the visited annotation.
+      */
+    public AnnotationRemapper(
+            final String descriptor, final AnnotationVisitor annotationVisitor, final Remapper remapper) {
+        this(/* latest api = */ Opcodes.ASM9, descriptor, annotationVisitor, remapper);
+    }
+
+    /**
+      * Constructs a new {@link AnnotationRemapper}.
+      *
+      * @param api the ASM API version supported by this remapper. Must be one of the {@code
+      *     ASM}<i>x</i> values in {@link Opcodes}.
+      * @param annotationVisitor the annotation visitor this remapper must delegate to.
+      * @param remapper the remapper to use to remap the types in the visited annotation.
+      * @deprecated use {@link #AnnotationRemapper(int, String, AnnotationVisitor, Remapper)} instead.
+      */
+    @Deprecated
+    protected AnnotationRemapper(
+            final int api, final AnnotationVisitor annotationVisitor, final Remapper remapper) {
+        this(api, /* descriptor = */ null, annotationVisitor, remapper);
+    }
+
+    /**
+      * Constructs a new {@link AnnotationRemapper}.
+      *
+      * @param api the ASM API version supported by this remapper. Must be one of the {@code
+      *     ASM}<i>x</i> values in {@link Opcodes}.
+      * @param descriptor the descriptor of the visited annotation. May be {@literal null}.
+      * @param annotationVisitor the annotation visitor this remapper must delegate to.
+      * @param remapper the remapper to use to remap the types in the visited annotation.
+      */
+    protected AnnotationRemapper(
+            final int api,
+            final String descriptor,
+            final AnnotationVisitor annotationVisitor,
+            final Remapper remapper) {
+        super(api, annotationVisitor);
+        this.descriptor = descriptor;
+        this.remapper = remapper;
+    }
+
+    @Override
+    public void visit(final String name, final Object value) {
+        super.visit(mapAnnotationAttributeName(name), remapper.mapValue(value));
+    }
+
+    @Override
+    public void visitEnum(final String name, final String descriptor, final String value) {
+        super.visitEnum(mapAnnotationAttributeName(name), remapper.mapDesc(descriptor), value);
+    }
+
+    @Override
+    public AnnotationVisitor visitAnnotation(final String name, final String descriptor) {
+        AnnotationVisitor annotationVisitor =
+                super.visitAnnotation(mapAnnotationAttributeName(name), remapper.mapDesc(descriptor));
+        if (annotationVisitor == null) {
+            return null;
+        } else {
+            return annotationVisitor == av
+                    ? this
+                    : createAnnotationRemapper(descriptor, annotationVisitor);
+        }
+    }
+
+    @Override
+    public AnnotationVisitor visitArray(final String name) {
+        AnnotationVisitor annotationVisitor = super.visitArray(mapAnnotationAttributeName(name));
+        if (annotationVisitor == null) {
+            return null;
+        } else {
+            return annotationVisitor == av
+                    ? this
+                    : createAnnotationRemapper(/* descriptor = */ null, annotationVisitor);
+        }
+    }
+
+    /**
+      * Constructs a new remapper for annotations. The default implementation of this method returns a
+      * new {@link AnnotationRemapper}.
+      *
+      * @param annotationVisitor the AnnotationVisitor the remapper must delegate to.
+      * @return the newly created remapper.
+      * @deprecated use {@link #createAnnotationRemapper(String, AnnotationVisitor)} instead.
+      */
+    @Deprecated
+    protected AnnotationVisitor createAnnotationRemapper(final AnnotationVisitor annotationVisitor) {
+        return new AnnotationRemapper(api, /* descriptor = */ null, annotationVisitor, remapper);
+    }
+
+    /**
+      * Constructs a new remapper for annotations. The default implementation of this method returns a
+      * new {@link AnnotationRemapper}.
+      *
+      * @param descriptor the descriptor of the visited annotation.
+      * @param annotationVisitor the AnnotationVisitor the remapper must delegate to.
+      * @return the newly created remapper.
+      */
+    protected AnnotationVisitor createAnnotationRemapper(
+            final String descriptor, final AnnotationVisitor annotationVisitor) {
+        return new AnnotationRemapper(api, descriptor, annotationVisitor, remapper)
+                .orDeprecatedValue(createAnnotationRemapper(annotationVisitor));
+    }
+
+    /**
+      * Returns either this object, or the given one. If the given object is equal to the object
+      * returned by the default implementation of the deprecated createAnnotationRemapper method,
+      * meaning that this method has not been overridden (or only in minor ways, for instance to add
+      * logging), then we can return this object instead, supposed to have been created by the new
+      * createAnnotationRemapper method. Otherwise we must return the given object.
+      *
+      * @param deprecatedAnnotationVisitor the result of a call to the deprecated
+      *     createAnnotationRemapper method.
+      * @return either this object, or the given one.
+      */
+    final AnnotationVisitor orDeprecatedValue(final AnnotationVisitor deprecatedAnnotationVisitor) {
+        if (deprecatedAnnotationVisitor.getClass() == getClass()) {
+            AnnotationRemapper deprecatedAnnotationRemapper =
+                    (AnnotationRemapper) deprecatedAnnotationVisitor;
+            if (deprecatedAnnotationRemapper.api == api
+                    && deprecatedAnnotationRemapper.av == av
+                    && deprecatedAnnotationRemapper.remapper == remapper) {
+                return this;
+            }
+        }
+        return deprecatedAnnotationVisitor;
+    }
+
+    /**
+      * Maps an annotation attribute name with the remapper. Returns the original name unchanged if the
+      * descriptor of the annotation is {@literal null}.
+      *
+      * @param name the name of the annotation attribute.
+      * @return the new name of the annotation attribute.
+      */
+    private String mapAnnotationAttributeName(final String name) {
+        if (descriptor == null) {
+            return name;
+        }
+        return remapper.mapAnnotationAttributeName(descriptor, name);
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/org/objectweb/asm/commons/ClassRemapper.class b/tests/test_data/std/jdk/internal/org/objectweb/asm/commons/ClassRemapper.class
new file mode 100644
index 0000000000000000000000000000000000000000..3fbe80057cdfa5f8a4f73370554db3bbdcb3014e
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diff --git a/tests/test_data/std/jdk/internal/org/objectweb/asm/commons/ClassRemapper.java b/tests/test_data/std/jdk/internal/org/objectweb/asm/commons/ClassRemapper.java
new file mode 100644
index 00000000..03a57618
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/org/objectweb/asm/commons/ClassRemapper.java
@@ -0,0 +1,331 @@
+/*
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/*
+ * This file is available under and governed by the GNU General Public
+ * License version 2 only, as published by the Free Software Foundation.
+ * However, the following notice accompanied the original version of this
+ * file:
+ *
+ * ASM: a very small and fast Java bytecode manipulation framework
+ * Copyright (c) 2000-2011 INRIA, France Telecom
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the copyright holders nor the names of its
+ *    contributors may be used to endorse or promote products derived from
+ *    this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+package jdk.internal.org.objectweb.asm.commons;
+
+import java.util.List;
+import jdk.internal.org.objectweb.asm.AnnotationVisitor;
+import jdk.internal.org.objectweb.asm.Attribute;
+import jdk.internal.org.objectweb.asm.ClassVisitor;
+import jdk.internal.org.objectweb.asm.FieldVisitor;
+import jdk.internal.org.objectweb.asm.MethodVisitor;
+import jdk.internal.org.objectweb.asm.ModuleVisitor;
+import jdk.internal.org.objectweb.asm.Opcodes;
+import jdk.internal.org.objectweb.asm.RecordComponentVisitor;
+import jdk.internal.org.objectweb.asm.TypePath;
+
+/**
+ * A {@link ClassVisitor} that remaps types with a {@link Remapper}.
+ *
+ * <p><i>This visitor has several limitations</i>. A non-exhaustive list is the following:
+ *
+ * <ul>
+ *   <li>it cannot remap type names in dynamically computed strings (remapping of type names in
+ *       static values is supported).
+ *   <li>it cannot remap values derived from type names at compile time, such as
+ *       <ul>
+ *         <li>type name hashcodes used by some Java compilers to implement the string switch
+ *             statement.
+ *         <li>some compound strings used by some Java compilers to implement lambda
+ *             deserialization.
+ *       </ul>
+ * </ul>
+ *
+ * @author Eugene Kuleshov
+ */
+public class ClassRemapper extends ClassVisitor {
+
+    /** The remapper used to remap the types in the visited class. */
+    protected final Remapper remapper;
+
+    /** The internal name of the visited class. */
+    protected String className;
+
+    /**
+      * Constructs a new {@link ClassRemapper}. <i>Subclasses must not use this constructor</i>.
+      * Instead, they must use the {@link #ClassRemapper(int,ClassVisitor,Remapper)} version.
+      *
+      * @param classVisitor the class visitor this remapper must delegate to.
+      * @param remapper the remapper to use to remap the types in the visited class.
+      */
+    public ClassRemapper(final ClassVisitor classVisitor, final Remapper remapper) {
+        this(/* latest api = */ Opcodes.ASM9, classVisitor, remapper);
+    }
+
+    /**
+      * Constructs a new {@link ClassRemapper}.
+      *
+      * @param api the ASM API version supported by this remapper. Must be one of the {@code
+      *     ASM}<i>x</i> values in {@link Opcodes}.
+      * @param classVisitor the class visitor this remapper must delegate to.
+      * @param remapper the remapper to use to remap the types in the visited class.
+      */
+    protected ClassRemapper(final int api, final ClassVisitor classVisitor, final Remapper remapper) {
+        super(api, classVisitor);
+        this.remapper = remapper;
+    }
+
+    @Override
+    public void visit(
+            final int version,
+            final int access,
+            final String name,
+            final String signature,
+            final String superName,
+            final String[] interfaces) {
+        this.className = name;
+        super.visit(
+                version,
+                access,
+                remapper.mapType(name),
+                remapper.mapSignature(signature, false),
+                remapper.mapType(superName),
+                interfaces == null ? null : remapper.mapTypes(interfaces));
+    }
+
+    @Override
+    public ModuleVisitor visitModule(final String name, final int flags, final String version) {
+        ModuleVisitor moduleVisitor = super.visitModule(remapper.mapModuleName(name), flags, version);
+        return moduleVisitor == null ? null : createModuleRemapper(moduleVisitor);
+    }
+
+    @Override
+    public AnnotationVisitor visitAnnotation(final String descriptor, final boolean visible) {
+        AnnotationVisitor annotationVisitor =
+                super.visitAnnotation(remapper.mapDesc(descriptor), visible);
+        return annotationVisitor == null
+                ? null
+                : createAnnotationRemapper(descriptor, annotationVisitor);
+    }
+
+    @Override
+    public AnnotationVisitor visitTypeAnnotation(
+            final int typeRef, final TypePath typePath, final String descriptor, final boolean visible) {
+        AnnotationVisitor annotationVisitor =
+                super.visitTypeAnnotation(typeRef, typePath, remapper.mapDesc(descriptor), visible);
+        return annotationVisitor == null
+                ? null
+                : createAnnotationRemapper(descriptor, annotationVisitor);
+    }
+
+    @Override
+    public void visitAttribute(final Attribute attribute) {
+        if (attribute instanceof ModuleHashesAttribute) {
+            ModuleHashesAttribute moduleHashesAttribute = (ModuleHashesAttribute) attribute;
+            List<String> modules = moduleHashesAttribute.modules;
+            for (int i = 0; i < modules.size(); ++i) {
+                modules.set(i, remapper.mapModuleName(modules.get(i)));
+            }
+        }
+        super.visitAttribute(attribute);
+    }
+
+    @Override
+    public RecordComponentVisitor visitRecordComponent(
+            final String name, final String descriptor, final String signature) {
+        RecordComponentVisitor recordComponentVisitor =
+                super.visitRecordComponent(
+                        remapper.mapRecordComponentName(className, name, descriptor),
+                        remapper.mapDesc(descriptor),
+                        remapper.mapSignature(signature, true));
+        return recordComponentVisitor == null
+                ? null
+                : createRecordComponentRemapper(recordComponentVisitor);
+    }
+
+    @Override
+    public FieldVisitor visitField(
+            final int access,
+            final String name,
+            final String descriptor,
+            final String signature,
+            final Object value) {
+        FieldVisitor fieldVisitor =
+                super.visitField(
+                        access,
+                        remapper.mapFieldName(className, name, descriptor),
+                        remapper.mapDesc(descriptor),
+                        remapper.mapSignature(signature, true),
+                        (value == null) ? null : remapper.mapValue(value));
+        return fieldVisitor == null ? null : createFieldRemapper(fieldVisitor);
+    }
+
+    @Override
+    public MethodVisitor visitMethod(
+            final int access,
+            final String name,
+            final String descriptor,
+            final String signature,
+            final String[] exceptions) {
+        String remappedDescriptor = remapper.mapMethodDesc(descriptor);
+        MethodVisitor methodVisitor =
+                super.visitMethod(
+                        access,
+                        remapper.mapMethodName(className, name, descriptor),
+                        remappedDescriptor,
+                        remapper.mapSignature(signature, false),
+                        exceptions == null ? null : remapper.mapTypes(exceptions));
+        return methodVisitor == null ? null : createMethodRemapper(methodVisitor);
+    }
+
+    @Override
+    public void visitInnerClass(
+            final String name, final String outerName, final String innerName, final int access) {
+        super.visitInnerClass(
+                remapper.mapType(name),
+                outerName == null ? null : remapper.mapType(outerName),
+                innerName == null ? null : remapper.mapInnerClassName(name, outerName, innerName),
+                access);
+    }
+
+    @Override
+    public void visitOuterClass(final String owner, final String name, final String descriptor) {
+        super.visitOuterClass(
+                remapper.mapType(owner),
+                name == null ? null : remapper.mapMethodName(owner, name, descriptor),
+                descriptor == null ? null : remapper.mapMethodDesc(descriptor));
+    }
+
+    @Override
+    public void visitNestHost(final String nestHost) {
+        super.visitNestHost(remapper.mapType(nestHost));
+    }
+
+    @Override
+    public void visitNestMember(final String nestMember) {
+        super.visitNestMember(remapper.mapType(nestMember));
+    }
+
+    @Override
+    public void visitPermittedSubclass(final String permittedSubclass) {
+        super.visitPermittedSubclass(remapper.mapType(permittedSubclass));
+    }
+
+    /**
+      * Constructs a new remapper for fields. The default implementation of this method returns a new
+      * {@link FieldRemapper}.
+      *
+      * @param fieldVisitor the FieldVisitor the remapper must delegate to.
+      * @return the newly created remapper.
+      */
+    protected FieldVisitor createFieldRemapper(final FieldVisitor fieldVisitor) {
+        return new FieldRemapper(api, fieldVisitor, remapper);
+    }
+
+    /**
+      * Constructs a new remapper for methods. The default implementation of this method returns a new
+      * {@link MethodRemapper}.
+      *
+      * @param methodVisitor the MethodVisitor the remapper must delegate to.
+      * @return the newly created remapper.
+      */
+    protected MethodVisitor createMethodRemapper(final MethodVisitor methodVisitor) {
+        return new MethodRemapper(api, methodVisitor, remapper);
+    }
+
+    /**
+      * Constructs a new remapper for annotations. The default implementation of this method returns a
+      * new {@link AnnotationRemapper}.
+      *
+      * @param annotationVisitor the AnnotationVisitor the remapper must delegate to.
+      * @return the newly created remapper.
+      * @deprecated use {@link #createAnnotationRemapper(String, AnnotationVisitor)} instead.
+      */
+    @Deprecated
+    protected AnnotationVisitor createAnnotationRemapper(final AnnotationVisitor annotationVisitor) {
+        return new AnnotationRemapper(api, /* descriptor = */ null, annotationVisitor, remapper);
+    }
+
+    /**
+      * Constructs a new remapper for annotations. The default implementation of this method returns a
+      * new {@link AnnotationRemapper}.
+      *
+      * @param descriptor the descriptor of the visited annotation.
+      * @param annotationVisitor the AnnotationVisitor the remapper must delegate to.
+      * @return the newly created remapper.
+      */
+    protected AnnotationVisitor createAnnotationRemapper(
+            final String descriptor, final AnnotationVisitor annotationVisitor) {
+        return new AnnotationRemapper(api, descriptor, annotationVisitor, remapper)
+                .orDeprecatedValue(createAnnotationRemapper(annotationVisitor));
+    }
+
+    /**
+      * Constructs a new remapper for modules. The default implementation of this method returns a new
+      * {@link ModuleRemapper}.
+      *
+      * @param moduleVisitor the ModuleVisitor the remapper must delegate to.
+      * @return the newly created remapper.
+      */
+    protected ModuleVisitor createModuleRemapper(final ModuleVisitor moduleVisitor) {
+        return new ModuleRemapper(api, moduleVisitor, remapper);
+    }
+
+    /**
+      * Constructs a new remapper for record components. The default implementation of this method
+      * returns a new {@link RecordComponentRemapper}.
+      *
+      * @param recordComponentVisitor the RecordComponentVisitor the remapper must delegate to.
+      * @return the newly created remapper.
+      */
+    protected RecordComponentVisitor createRecordComponentRemapper(
+            final RecordComponentVisitor recordComponentVisitor) {
+        return new RecordComponentRemapper(api, recordComponentVisitor, remapper);
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/org/objectweb/asm/commons/CodeSizeEvaluator.class b/tests/test_data/std/jdk/internal/org/objectweb/asm/commons/CodeSizeEvaluator.class
new file mode 100644
index 0000000000000000000000000000000000000000..206bf07848585db4c1869f4bf5b5502e77c8d2da
GIT binary patch
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HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/org/objectweb/asm/commons/CodeSizeEvaluator.java b/tests/test_data/std/jdk/internal/org/objectweb/asm/commons/CodeSizeEvaluator.java
new file mode 100644
index 00000000..2392cdcd
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/org/objectweb/asm/commons/CodeSizeEvaluator.java
@@ -0,0 +1,239 @@
+/*
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/*
+ * This file is available under and governed by the GNU General Public
+ * License version 2 only, as published by the Free Software Foundation.
+ * However, the following notice accompanied the original version of this
+ * file:
+ *
+ * ASM: a very small and fast Java bytecode manipulation framework
+ * Copyright (c) 2000-2011 INRIA, France Telecom
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the copyright holders nor the names of its
+ *    contributors may be used to endorse or promote products derived from
+ *    this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+package jdk.internal.org.objectweb.asm.commons;
+
+import jdk.internal.org.objectweb.asm.ConstantDynamic;
+import jdk.internal.org.objectweb.asm.Handle;
+import jdk.internal.org.objectweb.asm.Label;
+import jdk.internal.org.objectweb.asm.MethodVisitor;
+import jdk.internal.org.objectweb.asm.Opcodes;
+
+/**
+ * A {@link MethodVisitor} that approximates the size of the methods it visits.
+ *
+ * @author Eugene Kuleshov
+ */
+public class CodeSizeEvaluator extends MethodVisitor implements Opcodes {
+
+    /** The minimum size in bytes of the visited method. */
+    private int minSize;
+
+    /** The maximum size in bytes of the visited method. */
+    private int maxSize;
+
+    public CodeSizeEvaluator(final MethodVisitor methodVisitor) {
+        this(/* latest api = */ Opcodes.ASM9, methodVisitor);
+    }
+
+    protected CodeSizeEvaluator(final int api, final MethodVisitor methodVisitor) {
+        super(api, methodVisitor);
+    }
+
+    public int getMinSize() {
+        return this.minSize;
+    }
+
+    public int getMaxSize() {
+        return this.maxSize;
+    }
+
+    @Override
+    public void visitInsn(final int opcode) {
+        minSize += 1;
+        maxSize += 1;
+        super.visitInsn(opcode);
+    }
+
+    @Override
+    public void visitIntInsn(final int opcode, final int operand) {
+        if (opcode == SIPUSH) {
+            minSize += 3;
+            maxSize += 3;
+        } else {
+            minSize += 2;
+            maxSize += 2;
+        }
+        super.visitIntInsn(opcode, operand);
+    }
+
+    @Override
+    public void visitVarInsn(final int opcode, final int varIndex) {
+        if (varIndex < 4 && opcode != RET) {
+            minSize += 1;
+            maxSize += 1;
+        } else if (varIndex >= 256) {
+            minSize += 4;
+            maxSize += 4;
+        } else {
+            minSize += 2;
+            maxSize += 2;
+        }
+        super.visitVarInsn(opcode, varIndex);
+    }
+
+    @Override
+    public void visitTypeInsn(final int opcode, final String type) {
+        minSize += 3;
+        maxSize += 3;
+        super.visitTypeInsn(opcode, type);
+    }
+
+    @Override
+    public void visitFieldInsn(
+            final int opcode, final String owner, final String name, final String descriptor) {
+        minSize += 3;
+        maxSize += 3;
+        super.visitFieldInsn(opcode, owner, name, descriptor);
+    }
+
+    @Override
+    public void visitMethodInsn(
+            final int opcodeAndSource,
+            final String owner,
+            final String name,
+            final String descriptor,
+            final boolean isInterface) {
+        if (api < Opcodes.ASM5 && (opcodeAndSource & Opcodes.SOURCE_DEPRECATED) == 0) {
+            // Redirect the call to the deprecated version of this method.
+            super.visitMethodInsn(opcodeAndSource, owner, name, descriptor, isInterface);
+            return;
+        }
+        int opcode = opcodeAndSource & ~Opcodes.SOURCE_MASK;
+
+        if (opcode == INVOKEINTERFACE) {
+            minSize += 5;
+            maxSize += 5;
+        } else {
+            minSize += 3;
+            maxSize += 3;
+        }
+        super.visitMethodInsn(opcodeAndSource, owner, name, descriptor, isInterface);
+    }
+
+    @Override
+    public void visitInvokeDynamicInsn(
+            final String name,
+            final String descriptor,
+            final Handle bootstrapMethodHandle,
+            final Object... bootstrapMethodArguments) {
+        minSize += 5;
+        maxSize += 5;
+        super.visitInvokeDynamicInsn(name, descriptor, bootstrapMethodHandle, bootstrapMethodArguments);
+    }
+
+    @Override
+    public void visitJumpInsn(final int opcode, final Label label) {
+        minSize += 3;
+        if (opcode == GOTO || opcode == JSR) {
+            maxSize += 5;
+        } else {
+            maxSize += 8;
+        }
+        super.visitJumpInsn(opcode, label);
+    }
+
+    @Override
+    public void visitLdcInsn(final Object value) {
+        if (value instanceof Long
+                || value instanceof Double
+                || (value instanceof ConstantDynamic && ((ConstantDynamic) value).getSize() == 2)) {
+            minSize += 3;
+            maxSize += 3;
+        } else {
+            minSize += 2;
+            maxSize += 3;
+        }
+        super.visitLdcInsn(value);
+    }
+
+    @Override
+    public void visitIincInsn(final int varIndex, final int increment) {
+        if (varIndex > 255 || increment > 127 || increment < -128) {
+            minSize += 6;
+            maxSize += 6;
+        } else {
+            minSize += 3;
+            maxSize += 3;
+        }
+        super.visitIincInsn(varIndex, increment);
+    }
+
+    @Override
+    public void visitTableSwitchInsn(
+            final int min, final int max, final Label dflt, final Label... labels) {
+        minSize += 13 + labels.length * 4;
+        maxSize += 16 + labels.length * 4;
+        super.visitTableSwitchInsn(min, max, dflt, labels);
+    }
+
+    @Override
+    public void visitLookupSwitchInsn(final Label dflt, final int[] keys, final Label[] labels) {
+        minSize += 9 + keys.length * 8;
+        maxSize += 12 + keys.length * 8;
+        super.visitLookupSwitchInsn(dflt, keys, labels);
+    }
+
+    @Override
+    public void visitMultiANewArrayInsn(final String descriptor, final int numDimensions) {
+        minSize += 4;
+        maxSize += 4;
+        super.visitMultiANewArrayInsn(descriptor, numDimensions);
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/org/objectweb/asm/commons/FieldRemapper.class b/tests/test_data/std/jdk/internal/org/objectweb/asm/commons/FieldRemapper.class
new file mode 100644
index 0000000000000000000000000000000000000000..7149a33f4d8ce4cfac9b3d9cdedd441aef369c82
GIT binary patch
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/org/objectweb/asm/commons/FieldRemapper.java b/tests/test_data/std/jdk/internal/org/objectweb/asm/commons/FieldRemapper.java
new file mode 100644
index 00000000..205f985d
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/org/objectweb/asm/commons/FieldRemapper.java
@@ -0,0 +1,146 @@
+/*
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/*
+ * This file is available under and governed by the GNU General Public
+ * License version 2 only, as published by the Free Software Foundation.
+ * However, the following notice accompanied the original version of this
+ * file:
+ *
+ * ASM: a very small and fast Java bytecode manipulation framework
+ * Copyright (c) 2000-2011 INRIA, France Telecom
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the copyright holders nor the names of its
+ *    contributors may be used to endorse or promote products derived from
+ *    this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+package jdk.internal.org.objectweb.asm.commons;
+
+import jdk.internal.org.objectweb.asm.AnnotationVisitor;
+import jdk.internal.org.objectweb.asm.FieldVisitor;
+import jdk.internal.org.objectweb.asm.Opcodes;
+import jdk.internal.org.objectweb.asm.TypePath;
+
+/**
+ * A {@link FieldVisitor} that remaps types with a {@link Remapper}.
+ *
+ * @author Eugene Kuleshov
+ */
+public class FieldRemapper extends FieldVisitor {
+
+    /** The remapper used to remap the types in the visited field. */
+    protected final Remapper remapper;
+
+    /**
+      * Constructs a new {@link FieldRemapper}. <i>Subclasses must not use this constructor</i>.
+      * Instead, they must use the {@link #FieldRemapper(int,FieldVisitor,Remapper)} version.
+      *
+      * @param fieldVisitor the field visitor this remapper must delegate to.
+      * @param remapper the remapper to use to remap the types in the visited field.
+      */
+    public FieldRemapper(final FieldVisitor fieldVisitor, final Remapper remapper) {
+        this(/* latest api = */ Opcodes.ASM9, fieldVisitor, remapper);
+    }
+
+    /**
+      * Constructs a new {@link FieldRemapper}.
+      *
+      * @param api the ASM API version supported by this remapper. Must be one of the {@code
+      *     ASM}<i>x</i> values in {@link Opcodes}.
+      * @param fieldVisitor the field visitor this remapper must delegate to.
+      * @param remapper the remapper to use to remap the types in the visited field.
+      */
+    protected FieldRemapper(final int api, final FieldVisitor fieldVisitor, final Remapper remapper) {
+        super(api, fieldVisitor);
+        this.remapper = remapper;
+    }
+
+    @Override
+    public AnnotationVisitor visitAnnotation(final String descriptor, final boolean visible) {
+        AnnotationVisitor annotationVisitor =
+                super.visitAnnotation(remapper.mapDesc(descriptor), visible);
+        return annotationVisitor == null
+                ? null
+                : createAnnotationRemapper(descriptor, annotationVisitor);
+    }
+
+    @Override
+    public AnnotationVisitor visitTypeAnnotation(
+            final int typeRef, final TypePath typePath, final String descriptor, final boolean visible) {
+        AnnotationVisitor annotationVisitor =
+                super.visitTypeAnnotation(typeRef, typePath, remapper.mapDesc(descriptor), visible);
+        return annotationVisitor == null
+                ? null
+                : createAnnotationRemapper(descriptor, annotationVisitor);
+    }
+
+    /**
+      * Constructs a new remapper for annotations. The default implementation of this method returns a
+      * new {@link AnnotationRemapper}.
+      *
+      * @param annotationVisitor the AnnotationVisitor the remapper must delegate to.
+      * @return the newly created remapper.
+      * @deprecated use {@link #createAnnotationRemapper(String, AnnotationVisitor)} instead.
+      */
+    @Deprecated
+    protected AnnotationVisitor createAnnotationRemapper(final AnnotationVisitor annotationVisitor) {
+        return new AnnotationRemapper(api, /* descriptor = */ null, annotationVisitor, remapper);
+    }
+
+    /**
+      * Constructs a new remapper for annotations. The default implementation of this method returns a
+      * new {@link AnnotationRemapper}.
+      *
+      * @param descriptor the descriptor of the visited annotation.
+      * @param annotationVisitor the AnnotationVisitor the remapper must delegate to.
+      * @return the newly created remapper.
+      */
+    protected AnnotationVisitor createAnnotationRemapper(
+            final String descriptor, final AnnotationVisitor annotationVisitor) {
+        return new AnnotationRemapper(api, descriptor, annotationVisitor, remapper)
+                .orDeprecatedValue(createAnnotationRemapper(annotationVisitor));
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/org/objectweb/asm/commons/GeneratorAdapter.class b/tests/test_data/std/jdk/internal/org/objectweb/asm/commons/GeneratorAdapter.class
new file mode 100644
index 0000000000000000000000000000000000000000..be15a44298a6032b1d1f328e80cc29c8502eba37
GIT binary patch
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diff --git a/tests/test_data/std/jdk/internal/org/objectweb/asm/commons/GeneratorAdapter.java b/tests/test_data/std/jdk/internal/org/objectweb/asm/commons/GeneratorAdapter.java
new file mode 100644
index 00000000..ecf4ac10
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/org/objectweb/asm/commons/GeneratorAdapter.java
@@ -0,0 +1,1401 @@
+/*
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/*
+ * This file is available under and governed by the GNU General Public
+ * License version 2 only, as published by the Free Software Foundation.
+ * However, the following notice accompanied the original version of this
+ * file:
+ *
+ * ASM: a very small and fast Java bytecode manipulation framework
+ * Copyright (c) 2000-2011 INRIA, France Telecom
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the copyright holders nor the names of its
+ *    contributors may be used to endorse or promote products derived from
+ *    this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+package jdk.internal.org.objectweb.asm.commons;
+
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.List;
+import jdk.internal.org.objectweb.asm.ClassVisitor;
+import jdk.internal.org.objectweb.asm.ConstantDynamic;
+import jdk.internal.org.objectweb.asm.Handle;
+import jdk.internal.org.objectweb.asm.Label;
+import jdk.internal.org.objectweb.asm.MethodVisitor;
+import jdk.internal.org.objectweb.asm.Opcodes;
+import jdk.internal.org.objectweb.asm.Type;
+
+/**
+ * A {@link MethodVisitor} with convenient methods to generate code. For example, using this
+ * adapter, the class below
+ *
+ * <pre>
+ * public class Example {
+ *   public static void main(String[] args) {
+ *     System.out.println(&quot;Hello world!&quot;);
+ *   }
+ * }
+ * </pre>
+ *
+ * <p>can be generated as follows:
+ *
+ * <pre>
+ * ClassWriter cw = new ClassWriter(0);
+ * cw.visit(V1_1, ACC_PUBLIC, &quot;Example&quot;, null, &quot;java/lang/Object&quot;, null);
+ *
+ * Method m = Method.getMethod(&quot;void &lt;init&gt; ()&quot;);
+ * GeneratorAdapter mg = new GeneratorAdapter(ACC_PUBLIC, m, null, null, cw);
+ * mg.loadThis();
+ * mg.invokeConstructor(Type.getType(Object.class), m);
+ * mg.returnValue();
+ * mg.endMethod();
+ *
+ * m = Method.getMethod(&quot;void main (String[])&quot;);
+ * mg = new GeneratorAdapter(ACC_PUBLIC + ACC_STATIC, m, null, null, cw);
+ * mg.getStatic(Type.getType(System.class), &quot;out&quot;, Type.getType(PrintStream.class));
+ * mg.push(&quot;Hello world!&quot;);
+ * mg.invokeVirtual(Type.getType(PrintStream.class),
+ *         Method.getMethod(&quot;void println (String)&quot;));
+ * mg.returnValue();
+ * mg.endMethod();
+ *
+ * cw.visitEnd();
+ * </pre>
+ *
+ * @author Juozas Baliuka
+ * @author Chris Nokleberg
+ * @author Eric Bruneton
+ * @author Prashant Deva
+ */
+public class GeneratorAdapter extends LocalVariablesSorter {
+
+    private static final String CLASS_DESCRIPTOR = "Ljava/lang/Class;";
+
+    private static final Type BYTE_TYPE = Type.getObjectType("java/lang/Byte");
+
+    private static final Type BOOLEAN_TYPE = Type.getObjectType("java/lang/Boolean");
+
+    private static final Type SHORT_TYPE = Type.getObjectType("java/lang/Short");
+
+    private static final Type CHARACTER_TYPE = Type.getObjectType("java/lang/Character");
+
+    private static final Type INTEGER_TYPE = Type.getObjectType("java/lang/Integer");
+
+    private static final Type FLOAT_TYPE = Type.getObjectType("java/lang/Float");
+
+    private static final Type LONG_TYPE = Type.getObjectType("java/lang/Long");
+
+    private static final Type DOUBLE_TYPE = Type.getObjectType("java/lang/Double");
+
+    private static final Type NUMBER_TYPE = Type.getObjectType("java/lang/Number");
+
+    private static final Type OBJECT_TYPE = Type.getObjectType("java/lang/Object");
+
+    private static final Method BOOLEAN_VALUE = Method.getMethod("boolean booleanValue()");
+
+    private static final Method CHAR_VALUE = Method.getMethod("char charValue()");
+
+    private static final Method INT_VALUE = Method.getMethod("int intValue()");
+
+    private static final Method FLOAT_VALUE = Method.getMethod("float floatValue()");
+
+    private static final Method LONG_VALUE = Method.getMethod("long longValue()");
+
+    private static final Method DOUBLE_VALUE = Method.getMethod("double doubleValue()");
+
+    /** Constant for the {@link #math} method. */
+    public static final int ADD = Opcodes.IADD;
+
+    /** Constant for the {@link #math} method. */
+    public static final int SUB = Opcodes.ISUB;
+
+    /** Constant for the {@link #math} method. */
+    public static final int MUL = Opcodes.IMUL;
+
+    /** Constant for the {@link #math} method. */
+    public static final int DIV = Opcodes.IDIV;
+
+    /** Constant for the {@link #math} method. */
+    public static final int REM = Opcodes.IREM;
+
+    /** Constant for the {@link #math} method. */
+    public static final int NEG = Opcodes.INEG;
+
+    /** Constant for the {@link #math} method. */
+    public static final int SHL = Opcodes.ISHL;
+
+    /** Constant for the {@link #math} method. */
+    public static final int SHR = Opcodes.ISHR;
+
+    /** Constant for the {@link #math} method. */
+    public static final int USHR = Opcodes.IUSHR;
+
+    /** Constant for the {@link #math} method. */
+    public static final int AND = Opcodes.IAND;
+
+    /** Constant for the {@link #math} method. */
+    public static final int OR = Opcodes.IOR;
+
+    /** Constant for the {@link #math} method. */
+    public static final int XOR = Opcodes.IXOR;
+
+    /** Constant for the {@link #ifCmp} method. */
+    public static final int EQ = Opcodes.IFEQ;
+
+    /** Constant for the {@link #ifCmp} method. */
+    public static final int NE = Opcodes.IFNE;
+
+    /** Constant for the {@link #ifCmp} method. */
+    public static final int LT = Opcodes.IFLT;
+
+    /** Constant for the {@link #ifCmp} method. */
+    public static final int GE = Opcodes.IFGE;
+
+    /** Constant for the {@link #ifCmp} method. */
+    public static final int GT = Opcodes.IFGT;
+
+    /** Constant for the {@link #ifCmp} method. */
+    public static final int LE = Opcodes.IFLE;
+
+    /** The access flags of the visited method. */
+    private final int access;
+
+    /** The name of the visited method. */
+    private final String name;
+
+    /** The return type of the visited method. */
+    private final Type returnType;
+
+    /** The argument types of the visited method. */
+    private final Type[] argumentTypes;
+
+    /** The types of the local variables of the visited method. */
+    private final List<Type> localTypes = new ArrayList<>();
+
+    /**
+      * Constructs a new {@link GeneratorAdapter}. <i>Subclasses must not use this constructor</i>.
+      * Instead, they must use the {@link #GeneratorAdapter(int, MethodVisitor, int, String, String)}
+      * version.
+      *
+      * @param methodVisitor the method visitor to which this adapter delegates calls.
+      * @param access the method's access flags (see {@link Opcodes}).
+      * @param name the method's name.
+      * @param descriptor the method's descriptor (see {@link Type}).
+      * @throws IllegalStateException if a subclass calls this constructor.
+      */
+    public GeneratorAdapter(
+            final MethodVisitor methodVisitor,
+            final int access,
+            final String name,
+            final String descriptor) {
+        this(/* latest api = */ Opcodes.ASM9, methodVisitor, access, name, descriptor);
+        if (getClass() != GeneratorAdapter.class) {
+            throw new IllegalStateException();
+        }
+    }
+
+    /**
+      * Constructs a new {@link GeneratorAdapter}.
+      *
+      * @param api the ASM API version implemented by this visitor. Must be one of the {@code
+      *     ASM}<i>x</i> values in {@link Opcodes}.
+      * @param methodVisitor the method visitor to which this adapter delegates calls.
+      * @param access the method's access flags (see {@link Opcodes}).
+      * @param name the method's name.
+      * @param descriptor the method's descriptor (see {@link Type}).
+      */
+    protected GeneratorAdapter(
+            final int api,
+            final MethodVisitor methodVisitor,
+            final int access,
+            final String name,
+            final String descriptor) {
+        super(api, access, descriptor, methodVisitor);
+        this.access = access;
+        this.name = name;
+        this.returnType = Type.getReturnType(descriptor);
+        this.argumentTypes = Type.getArgumentTypes(descriptor);
+    }
+
+    /**
+      * Constructs a new {@link GeneratorAdapter}. <i>Subclasses must not use this constructor</i>.
+      * Instead, they must use the {@link #GeneratorAdapter(int, MethodVisitor, int, String, String)}
+      * version.
+      *
+      * @param access access flags of the adapted method.
+      * @param method the adapted method.
+      * @param methodVisitor the method visitor to which this adapter delegates calls.
+      */
+    public GeneratorAdapter(
+            final int access, final Method method, final MethodVisitor methodVisitor) {
+        this(methodVisitor, access, method.getName(), method.getDescriptor());
+    }
+
+    /**
+      * Constructs a new {@link GeneratorAdapter}. <i>Subclasses must not use this constructor</i>.
+      * Instead, they must use the {@link #GeneratorAdapter(int, MethodVisitor, int, String, String)}
+      * version.
+      *
+      * @param access access flags of the adapted method.
+      * @param method the adapted method.
+      * @param signature the signature of the adapted method (may be {@literal null}).
+      * @param exceptions the exceptions thrown by the adapted method (may be {@literal null}).
+      * @param classVisitor the class visitor to which this adapter delegates calls.
+      */
+    public GeneratorAdapter(
+            final int access,
+            final Method method,
+            final String signature,
+            final Type[] exceptions,
+            final ClassVisitor classVisitor) {
+        this(
+                access,
+                method,
+                classVisitor.visitMethod(
+                        access,
+                        method.getName(),
+                        method.getDescriptor(),
+                        signature,
+                        exceptions == null ? null : getInternalNames(exceptions)));
+    }
+
+    /**
+      * Returns the internal names of the given types.
+      *
+      * @param types a set of types.
+      * @return the internal names of the given types (see {@link Type#getInternalName()}).
+      */
+    private static String[] getInternalNames(final Type[] types) {
+        String[] names = new String[types.length];
+        for (int i = 0; i < names.length; ++i) {
+            names[i] = types[i].getInternalName();
+        }
+        return names;
+    }
+
+    public int getAccess() {
+        return access;
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public Type getReturnType() {
+        return returnType;
+    }
+
+    public Type[] getArgumentTypes() {
+        return argumentTypes.clone();
+    }
+
+    // -----------------------------------------------------------------------------------------------
+    // Instructions to push constants on the stack
+    // -----------------------------------------------------------------------------------------------
+
+    /**
+      * Generates the instruction to push the given value on the stack.
+      *
+      * @param value the value to be pushed on the stack.
+      */
+    public void push(final boolean value) {
+        push(value ? 1 : 0);
+    }
+
+    /**
+      * Generates the instruction to push the given value on the stack.
+      *
+      * @param value the value to be pushed on the stack.
+      */
+    public void push(final int value) {
+        if (value >= -1 && value <= 5) {
+            mv.visitInsn(Opcodes.ICONST_0 + value);
+        } else if (value >= Byte.MIN_VALUE && value <= Byte.MAX_VALUE) {
+            mv.visitIntInsn(Opcodes.BIPUSH, value);
+        } else if (value >= Short.MIN_VALUE && value <= Short.MAX_VALUE) {
+            mv.visitIntInsn(Opcodes.SIPUSH, value);
+        } else {
+            mv.visitLdcInsn(value);
+        }
+    }
+
+    /**
+      * Generates the instruction to push the given value on the stack.
+      *
+      * @param value the value to be pushed on the stack.
+      */
+    public void push(final long value) {
+        if (value == 0L || value == 1L) {
+            mv.visitInsn(Opcodes.LCONST_0 + (int) value);
+        } else {
+            mv.visitLdcInsn(value);
+        }
+    }
+
+    /**
+      * Generates the instruction to push the given value on the stack.
+      *
+      * @param value the value to be pushed on the stack.
+      */
+    public void push(final float value) {
+        int bits = Float.floatToIntBits(value);
+        if (bits == 0L || bits == 0x3F800000 || bits == 0x40000000) { // 0..2
+            mv.visitInsn(Opcodes.FCONST_0 + (int) value);
+        } else {
+            mv.visitLdcInsn(value);
+        }
+    }
+
+    /**
+      * Generates the instruction to push the given value on the stack.
+      *
+      * @param value the value to be pushed on the stack.
+      */
+    public void push(final double value) {
+        long bits = Double.doubleToLongBits(value);
+        if (bits == 0L || bits == 0x3FF0000000000000L) { // +0.0d and 1.0d
+            mv.visitInsn(Opcodes.DCONST_0 + (int) value);
+        } else {
+            mv.visitLdcInsn(value);
+        }
+    }
+
+    /**
+      * Generates the instruction to push the given value on the stack.
+      *
+      * @param value the value to be pushed on the stack. May be {@literal null}.
+      */
+    public void push(final String value) {
+        if (value == null) {
+            mv.visitInsn(Opcodes.ACONST_NULL);
+        } else {
+            mv.visitLdcInsn(value);
+        }
+    }
+
+    /**
+      * Generates the instruction to push the given value on the stack.
+      *
+      * @param value the value to be pushed on the stack.
+      */
+    public void push(final Type value) {
+        if (value == null) {
+            mv.visitInsn(Opcodes.ACONST_NULL);
+        } else {
+            switch (value.getSort()) {
+                case Type.BOOLEAN:
+                    mv.visitFieldInsn(Opcodes.GETSTATIC, "java/lang/Boolean", "TYPE", CLASS_DESCRIPTOR);
+                    break;
+                case Type.CHAR:
+                    mv.visitFieldInsn(Opcodes.GETSTATIC, "java/lang/Character", "TYPE", CLASS_DESCRIPTOR);
+                    break;
+                case Type.BYTE:
+                    mv.visitFieldInsn(Opcodes.GETSTATIC, "java/lang/Byte", "TYPE", CLASS_DESCRIPTOR);
+                    break;
+                case Type.SHORT:
+                    mv.visitFieldInsn(Opcodes.GETSTATIC, "java/lang/Short", "TYPE", CLASS_DESCRIPTOR);
+                    break;
+                case Type.INT:
+                    mv.visitFieldInsn(Opcodes.GETSTATIC, "java/lang/Integer", "TYPE", CLASS_DESCRIPTOR);
+                    break;
+                case Type.FLOAT:
+                    mv.visitFieldInsn(Opcodes.GETSTATIC, "java/lang/Float", "TYPE", CLASS_DESCRIPTOR);
+                    break;
+                case Type.LONG:
+                    mv.visitFieldInsn(Opcodes.GETSTATIC, "java/lang/Long", "TYPE", CLASS_DESCRIPTOR);
+                    break;
+                case Type.DOUBLE:
+                    mv.visitFieldInsn(Opcodes.GETSTATIC, "java/lang/Double", "TYPE", CLASS_DESCRIPTOR);
+                    break;
+                default:
+                    mv.visitLdcInsn(value);
+                    break;
+            }
+        }
+    }
+
+    /**
+      * Generates the instruction to push a handle on the stack.
+      *
+      * @param handle the handle to be pushed on the stack.
+      */
+    public void push(final Handle handle) {
+        if (handle == null) {
+            mv.visitInsn(Opcodes.ACONST_NULL);
+        } else {
+            mv.visitLdcInsn(handle);
+        }
+    }
+
+    /**
+      * Generates the instruction to push a constant dynamic on the stack.
+      *
+      * @param constantDynamic the constant dynamic to be pushed on the stack.
+      */
+    public void push(final ConstantDynamic constantDynamic) {
+        if (constantDynamic == null) {
+            mv.visitInsn(Opcodes.ACONST_NULL);
+        } else {
+            mv.visitLdcInsn(constantDynamic);
+        }
+    }
+
+    // -----------------------------------------------------------------------------------------------
+    // Instructions to load and store method arguments
+    // -----------------------------------------------------------------------------------------------
+
+    /**
+      * Returns the index of the given method argument in the frame's local variables array.
+      *
+      * @param arg the index of a method argument.
+      * @return the index of the given method argument in the frame's local variables array.
+      */
+    private int getArgIndex(final int arg) {
+        int index = (access & Opcodes.ACC_STATIC) == 0 ? 1 : 0;
+        for (int i = 0; i < arg; i++) {
+            index += argumentTypes[i].getSize();
+        }
+        return index;
+    }
+
+    /**
+      * Generates the instruction to push a local variable on the stack.
+      *
+      * @param type the type of the local variable to be loaded.
+      * @param index an index in the frame's local variables array.
+      */
+    private void loadInsn(final Type type, final int index) {
+        mv.visitVarInsn(type.getOpcode(Opcodes.ILOAD), index);
+    }
+
+    /**
+      * Generates the instruction to store the top stack value in a local variable.
+      *
+      * @param type the type of the local variable to be stored.
+      * @param index an index in the frame's local variables array.
+      */
+    private void storeInsn(final Type type, final int index) {
+        mv.visitVarInsn(type.getOpcode(Opcodes.ISTORE), index);
+    }
+
+    /** Generates the instruction to load 'this' on the stack. */
+    public void loadThis() {
+        if ((access & Opcodes.ACC_STATIC) != 0) {
+            throw new IllegalStateException("no 'this' pointer within static method");
+        }
+        mv.visitVarInsn(Opcodes.ALOAD, 0);
+    }
+
+    /**
+      * Generates the instruction to load the given method argument on the stack.
+      *
+      * @param arg the index of a method argument.
+      */
+    public void loadArg(final int arg) {
+        loadInsn(argumentTypes[arg], getArgIndex(arg));
+    }
+
+    /**
+      * Generates the instructions to load the given method arguments on the stack.
+      *
+      * @param arg the index of the first method argument to be loaded.
+      * @param count the number of method arguments to be loaded.
+      */
+    public void loadArgs(final int arg, final int count) {
+        int index = getArgIndex(arg);
+        for (int i = 0; i < count; ++i) {
+            Type argumentType = argumentTypes[arg + i];
+            loadInsn(argumentType, index);
+            index += argumentType.getSize();
+        }
+    }
+
+    /** Generates the instructions to load all the method arguments on the stack. */
+    public void loadArgs() {
+        loadArgs(0, argumentTypes.length);
+    }
+
+    /**
+      * Generates the instructions to load all the method arguments on the stack, as a single object
+      * array.
+      */
+    public void loadArgArray() {
+        push(argumentTypes.length);
+        newArray(OBJECT_TYPE);
+        for (int i = 0; i < argumentTypes.length; i++) {
+            dup();
+            push(i);
+            loadArg(i);
+            box(argumentTypes[i]);
+            arrayStore(OBJECT_TYPE);
+        }
+    }
+
+    /**
+      * Generates the instruction to store the top stack value in the given method argument.
+      *
+      * @param arg the index of a method argument.
+      */
+    public void storeArg(final int arg) {
+        storeInsn(argumentTypes[arg], getArgIndex(arg));
+    }
+
+    // -----------------------------------------------------------------------------------------------
+    // Instructions to load and store local variables
+    // -----------------------------------------------------------------------------------------------
+
+    /**
+      * Returns the type of the given local variable.
+      *
+      * @param local a local variable identifier, as returned by {@link
+      *     LocalVariablesSorter#newLocal(Type)}.
+      * @return the type of the given local variable.
+      */
+    public Type getLocalType(final int local) {
+        return localTypes.get(local - firstLocal);
+    }
+
+    @Override
+    protected void setLocalType(final int local, final Type type) {
+        int index = local - firstLocal;
+        while (localTypes.size() < index + 1) {
+            localTypes.add(null);
+        }
+        localTypes.set(index, type);
+    }
+
+    /**
+      * Generates the instruction to load the given local variable on the stack.
+      *
+      * @param local a local variable identifier, as returned by {@link
+      *     LocalVariablesSorter#newLocal(Type)}.
+      */
+    public void loadLocal(final int local) {
+        loadInsn(getLocalType(local), local);
+    }
+
+    /**
+      * Generates the instruction to load the given local variable on the stack.
+      *
+      * @param local a local variable identifier, as returned by {@link
+      *     LocalVariablesSorter#newLocal(Type)}.
+      * @param type the type of this local variable.
+      */
+    public void loadLocal(final int local, final Type type) {
+        setLocalType(local, type);
+        loadInsn(type, local);
+    }
+
+    /**
+      * Generates the instruction to store the top stack value in the given local variable.
+      *
+      * @param local a local variable identifier, as returned by {@link
+      *     LocalVariablesSorter#newLocal(Type)}.
+      */
+    public void storeLocal(final int local) {
+        storeInsn(getLocalType(local), local);
+    }
+
+    /**
+      * Generates the instruction to store the top stack value in the given local variable.
+      *
+      * @param local a local variable identifier, as returned by {@link
+      *     LocalVariablesSorter#newLocal(Type)}.
+      * @param type the type of this local variable.
+      */
+    public void storeLocal(final int local, final Type type) {
+        setLocalType(local, type);
+        storeInsn(type, local);
+    }
+
+    /**
+      * Generates the instruction to load an element from an array.
+      *
+      * @param type the type of the array element to be loaded.
+      */
+    public void arrayLoad(final Type type) {
+        mv.visitInsn(type.getOpcode(Opcodes.IALOAD));
+    }
+
+    /**
+      * Generates the instruction to store an element in an array.
+      *
+      * @param type the type of the array element to be stored.
+      */
+    public void arrayStore(final Type type) {
+        mv.visitInsn(type.getOpcode(Opcodes.IASTORE));
+    }
+
+    // -----------------------------------------------------------------------------------------------
+    // Instructions to manage the stack
+    // -----------------------------------------------------------------------------------------------
+
+    /** Generates a POP instruction. */
+    public void pop() {
+        mv.visitInsn(Opcodes.POP);
+    }
+
+    /** Generates a POP2 instruction. */
+    public void pop2() {
+        mv.visitInsn(Opcodes.POP2);
+    }
+
+    /** Generates a DUP instruction. */
+    public void dup() {
+        mv.visitInsn(Opcodes.DUP);
+    }
+
+    /** Generates a DUP2 instruction. */
+    public void dup2() {
+        mv.visitInsn(Opcodes.DUP2);
+    }
+
+    /** Generates a DUP_X1 instruction. */
+    public void dupX1() {
+        mv.visitInsn(Opcodes.DUP_X1);
+    }
+
+    /** Generates a DUP_X2 instruction. */
+    public void dupX2() {
+        mv.visitInsn(Opcodes.DUP_X2);
+    }
+
+    /** Generates a DUP2_X1 instruction. */
+    public void dup2X1() {
+        mv.visitInsn(Opcodes.DUP2_X1);
+    }
+
+    /** Generates a DUP2_X2 instruction. */
+    public void dup2X2() {
+        mv.visitInsn(Opcodes.DUP2_X2);
+    }
+
+    /** Generates a SWAP instruction. */
+    public void swap() {
+        mv.visitInsn(Opcodes.SWAP);
+    }
+
+    /**
+      * Generates the instructions to swap the top two stack values.
+      *
+      * @param prev type of the top - 1 stack value.
+      * @param type type of the top stack value.
+      */
+    public void swap(final Type prev, final Type type) {
+        if (type.getSize() == 1) {
+            if (prev.getSize() == 1) {
+                swap(); // Same as dupX1 pop.
+            } else {
+                dupX2();
+                pop();
+            }
+        } else {
+            if (prev.getSize() == 1) {
+                dup2X1();
+                pop2();
+            } else {
+                dup2X2();
+                pop2();
+            }
+        }
+    }
+
+    // -----------------------------------------------------------------------------------------------
+    // Instructions to do mathematical and logical operations
+    // -----------------------------------------------------------------------------------------------
+
+    /**
+      * Generates the instruction to do the specified mathematical or logical operation.
+      *
+      * @param op a mathematical or logical operation. Must be one of ADD, SUB, MUL, DIV, REM, NEG,
+      *     SHL, SHR, USHR, AND, OR, XOR.
+      * @param type the type of the operand(s) for this operation.
+      */
+    public void math(final int op, final Type type) {
+        mv.visitInsn(type.getOpcode(op));
+    }
+
+    /** Generates the instructions to compute the bitwise negation of the top stack value. */
+    public void not() {
+        mv.visitInsn(Opcodes.ICONST_1);
+        mv.visitInsn(Opcodes.IXOR);
+    }
+
+    /**
+      * Generates the instruction to increment the given local variable.
+      *
+      * @param local the local variable to be incremented.
+      * @param amount the amount by which the local variable must be incremented.
+      */
+    public void iinc(final int local, final int amount) {
+        mv.visitIincInsn(local, amount);
+    }
+
+    /**
+      * Generates the instructions to cast a numerical value from one type to another.
+      *
+      * @param from the type of the top stack value
+      * @param to the type into which this value must be cast.
+      */
+    public void cast(final Type from, final Type to) {
+        if (from != to) {
+            if (from.getSort() < Type.BOOLEAN
+                    || from.getSort() > Type.DOUBLE
+                    || to.getSort() < Type.BOOLEAN
+                    || to.getSort() > Type.DOUBLE) {
+                throw new IllegalArgumentException("Cannot cast from " + from + " to " + to);
+            }
+            InstructionAdapter.cast(mv, from, to);
+        }
+    }
+
+    // -----------------------------------------------------------------------------------------------
+    // Instructions to do boxing and unboxing operations
+    // -----------------------------------------------------------------------------------------------
+
+    private static Type getBoxedType(final Type type) {
+        switch (type.getSort()) {
+            case Type.BYTE:
+                return BYTE_TYPE;
+            case Type.BOOLEAN:
+                return BOOLEAN_TYPE;
+            case Type.SHORT:
+                return SHORT_TYPE;
+            case Type.CHAR:
+                return CHARACTER_TYPE;
+            case Type.INT:
+                return INTEGER_TYPE;
+            case Type.FLOAT:
+                return FLOAT_TYPE;
+            case Type.LONG:
+                return LONG_TYPE;
+            case Type.DOUBLE:
+                return DOUBLE_TYPE;
+            default:
+                return type;
+        }
+    }
+
+    /**
+      * Generates the instructions to box the top stack value. This value is replaced by its boxed
+      * equivalent on top of the stack.
+      *
+      * @param type the type of the top stack value.
+      */
+    public void box(final Type type) {
+        if (type.getSort() == Type.OBJECT || type.getSort() == Type.ARRAY) {
+            return;
+        }
+        if (type == Type.VOID_TYPE) {
+            push((String) null);
+        } else {
+            Type boxedType = getBoxedType(type);
+            newInstance(boxedType);
+            if (type.getSize() == 2) {
+                // Pp -> Ppo -> oPpo -> ooPpo -> ooPp -> o
+                dupX2();
+                dupX2();
+                pop();
+            } else {
+                // p -> po -> opo -> oop -> o
+                dupX1();
+                swap();
+            }
+            invokeConstructor(boxedType, new Method("<init>", Type.VOID_TYPE, new Type[] {type}));
+        }
+    }
+
+    /**
+      * Generates the instructions to box the top stack value using Java 5's valueOf() method. This
+      * value is replaced by its boxed equivalent on top of the stack.
+      *
+      * @param type the type of the top stack value.
+      */
+    public void valueOf(final Type type) {
+        if (type.getSort() == Type.OBJECT || type.getSort() == Type.ARRAY) {
+            return;
+        }
+        if (type == Type.VOID_TYPE) {
+            push((String) null);
+        } else {
+            Type boxedType = getBoxedType(type);
+            invokeStatic(boxedType, new Method("valueOf", boxedType, new Type[] {type}));
+        }
+    }
+
+    /**
+      * Generates the instructions to unbox the top stack value. This value is replaced by its unboxed
+      * equivalent on top of the stack.
+      *
+      * @param type the type of the top stack value.
+      */
+    public void unbox(final Type type) {
+        Type boxedType = NUMBER_TYPE;
+        Method unboxMethod;
+        switch (type.getSort()) {
+            case Type.VOID:
+                return;
+            case Type.CHAR:
+                boxedType = CHARACTER_TYPE;
+                unboxMethod = CHAR_VALUE;
+                break;
+            case Type.BOOLEAN:
+                boxedType = BOOLEAN_TYPE;
+                unboxMethod = BOOLEAN_VALUE;
+                break;
+            case Type.DOUBLE:
+                unboxMethod = DOUBLE_VALUE;
+                break;
+            case Type.FLOAT:
+                unboxMethod = FLOAT_VALUE;
+                break;
+            case Type.LONG:
+                unboxMethod = LONG_VALUE;
+                break;
+            case Type.INT:
+            case Type.SHORT:
+            case Type.BYTE:
+                unboxMethod = INT_VALUE;
+                break;
+            default:
+                unboxMethod = null;
+                break;
+        }
+        if (unboxMethod == null) {
+            checkCast(type);
+        } else {
+            checkCast(boxedType);
+            invokeVirtual(boxedType, unboxMethod);
+        }
+    }
+
+    // -----------------------------------------------------------------------------------------------
+    // Instructions to jump to other instructions
+    // -----------------------------------------------------------------------------------------------
+
+    /**
+      * Constructs a new {@link Label}.
+      *
+      * @return a new {@link Label}.
+      */
+    public Label newLabel() {
+        return new Label();
+    }
+
+    /**
+      * Marks the current code position with the given label.
+      *
+      * @param label a label.
+      */
+    public void mark(final Label label) {
+        mv.visitLabel(label);
+    }
+
+    /**
+      * Marks the current code position with a new label.
+      *
+      * @return the label that was created to mark the current code position.
+      */
+    public Label mark() {
+        Label label = new Label();
+        mv.visitLabel(label);
+        return label;
+    }
+
+    /**
+      * Generates the instructions to jump to a label based on the comparison of the top two stack
+      * values.
+      *
+      * @param type the type of the top two stack values.
+      * @param mode how these values must be compared. One of EQ, NE, LT, GE, GT, LE.
+      * @param label where to jump if the comparison result is {@literal true}.
+      */
+    public void ifCmp(final Type type, final int mode, final Label label) {
+        switch (type.getSort()) {
+            case Type.LONG:
+                mv.visitInsn(Opcodes.LCMP);
+                break;
+            case Type.DOUBLE:
+                mv.visitInsn(mode == GE || mode == GT ? Opcodes.DCMPL : Opcodes.DCMPG);
+                break;
+            case Type.FLOAT:
+                mv.visitInsn(mode == GE || mode == GT ? Opcodes.FCMPL : Opcodes.FCMPG);
+                break;
+            case Type.ARRAY:
+            case Type.OBJECT:
+                if (mode == EQ) {
+                    mv.visitJumpInsn(Opcodes.IF_ACMPEQ, label);
+                    return;
+                } else if (mode == NE) {
+                    mv.visitJumpInsn(Opcodes.IF_ACMPNE, label);
+                    return;
+                } else {
+                    throw new IllegalArgumentException("Bad comparison for type " + type);
+                }
+            default:
+                int intOp = -1;
+                switch (mode) {
+                    case EQ:
+                        intOp = Opcodes.IF_ICMPEQ;
+                        break;
+                    case NE:
+                        intOp = Opcodes.IF_ICMPNE;
+                        break;
+                    case GE:
+                        intOp = Opcodes.IF_ICMPGE;
+                        break;
+                    case LT:
+                        intOp = Opcodes.IF_ICMPLT;
+                        break;
+                    case LE:
+                        intOp = Opcodes.IF_ICMPLE;
+                        break;
+                    case GT:
+                        intOp = Opcodes.IF_ICMPGT;
+                        break;
+                    default:
+                        throw new IllegalArgumentException("Bad comparison mode " + mode);
+                }
+                mv.visitJumpInsn(intOp, label);
+                return;
+        }
+        mv.visitJumpInsn(mode, label);
+    }
+
+    /**
+      * Generates the instructions to jump to a label based on the comparison of the top two integer
+      * stack values.
+      *
+      * @param mode how these values must be compared. One of EQ, NE, LT, GE, GT, LE.
+      * @param label where to jump if the comparison result is {@literal true}.
+      */
+    public void ifICmp(final int mode, final Label label) {
+        ifCmp(Type.INT_TYPE, mode, label);
+    }
+
+    /**
+      * Generates the instructions to jump to a label based on the comparison of the top integer stack
+      * value with zero.
+      *
+      * @param mode how these values must be compared. One of EQ, NE, LT, GE, GT, LE.
+      * @param label where to jump if the comparison result is {@literal true}.
+      */
+    public void ifZCmp(final int mode, final Label label) {
+        mv.visitJumpInsn(mode, label);
+    }
+
+    /**
+      * Generates the instruction to jump to the given label if the top stack value is null.
+      *
+      * @param label where to jump if the condition is {@literal true}.
+      */
+    public void ifNull(final Label label) {
+        mv.visitJumpInsn(Opcodes.IFNULL, label);
+    }
+
+    /**
+      * Generates the instruction to jump to the given label if the top stack value is not null.
+      *
+      * @param label where to jump if the condition is {@literal true}.
+      */
+    public void ifNonNull(final Label label) {
+        mv.visitJumpInsn(Opcodes.IFNONNULL, label);
+    }
+
+    /**
+      * Generates the instruction to jump to the given label.
+      *
+      * @param label where to jump if the condition is {@literal true}.
+      */
+    public void goTo(final Label label) {
+        mv.visitJumpInsn(Opcodes.GOTO, label);
+    }
+
+    /**
+      * Generates a RET instruction.
+      *
+      * @param local a local variable identifier, as returned by {@link
+      *     LocalVariablesSorter#newLocal(Type)}.
+      */
+    public void ret(final int local) {
+        mv.visitVarInsn(Opcodes.RET, local);
+    }
+
+    /**
+      * Generates the instructions for a switch statement.
+      *
+      * @param keys the switch case keys.
+      * @param generator a generator to generate the code for the switch cases.
+      */
+    public void tableSwitch(final int[] keys, final TableSwitchGenerator generator) {
+        float density;
+        if (keys.length == 0) {
+            density = 0;
+        } else {
+            density = (float) keys.length / (keys[keys.length - 1] - keys[0] + 1);
+        }
+        tableSwitch(keys, generator, density >= 0.5f);
+    }
+
+    /**
+      * Generates the instructions for a switch statement.
+      *
+      * @param keys the switch case keys.
+      * @param generator a generator to generate the code for the switch cases.
+      * @param useTable {@literal true} to use a TABLESWITCH instruction, or {@literal false} to use a
+      *     LOOKUPSWITCH instruction.
+      */
+    public void tableSwitch(
+            final int[] keys, final TableSwitchGenerator generator, final boolean useTable) {
+        for (int i = 1; i < keys.length; ++i) {
+            if (keys[i] < keys[i - 1]) {
+                throw new IllegalArgumentException("keys must be sorted in ascending order");
+            }
+        }
+        Label defaultLabel = newLabel();
+        Label endLabel = newLabel();
+        if (keys.length > 0) {
+            int numKeys = keys.length;
+            if (useTable) {
+                int min = keys[0];
+                int max = keys[numKeys - 1];
+                int range = max - min + 1;
+                Label[] labels = new Label[range];
+                Arrays.fill(labels, defaultLabel);
+                for (int i = 0; i < numKeys; ++i) {
+                    labels[keys[i] - min] = newLabel();
+                }
+                mv.visitTableSwitchInsn(min, max, defaultLabel, labels);
+                for (int i = 0; i < range; ++i) {
+                    Label label = labels[i];
+                    if (label != defaultLabel) {
+                        mark(label);
+                        generator.generateCase(i + min, endLabel);
+                    }
+                }
+            } else {
+                Label[] labels = new Label[numKeys];
+                for (int i = 0; i < numKeys; ++i) {
+                    labels[i] = newLabel();
+                }
+                mv.visitLookupSwitchInsn(defaultLabel, keys, labels);
+                for (int i = 0; i < numKeys; ++i) {
+                    mark(labels[i]);
+                    generator.generateCase(keys[i], endLabel);
+                }
+            }
+        }
+        mark(defaultLabel);
+        generator.generateDefault();
+        mark(endLabel);
+    }
+
+    /** Generates the instruction to return the top stack value to the caller. */
+    public void returnValue() {
+        mv.visitInsn(returnType.getOpcode(Opcodes.IRETURN));
+    }
+
+    // -----------------------------------------------------------------------------------------------
+    // Instructions to load and store fields
+    // -----------------------------------------------------------------------------------------------
+
+    /**
+      * Generates a get field or set field instruction.
+      *
+      * @param opcode the instruction's opcode.
+      * @param ownerType the class in which the field is defined.
+      * @param name the name of the field.
+      * @param fieldType the type of the field.
+      */
+    private void fieldInsn(
+            final int opcode, final Type ownerType, final String name, final Type fieldType) {
+        mv.visitFieldInsn(opcode, ownerType.getInternalName(), name, fieldType.getDescriptor());
+    }
+
+    /**
+      * Generates the instruction to push the value of a static field on the stack.
+      *
+      * @param owner the class in which the field is defined.
+      * @param name the name of the field.
+      * @param type the type of the field.
+      */
+    public void getStatic(final Type owner, final String name, final Type type) {
+        fieldInsn(Opcodes.GETSTATIC, owner, name, type);
+    }
+
+    /**
+      * Generates the instruction to store the top stack value in a static field.
+      *
+      * @param owner the class in which the field is defined.
+      * @param name the name of the field.
+      * @param type the type of the field.
+      */
+    public void putStatic(final Type owner, final String name, final Type type) {
+        fieldInsn(Opcodes.PUTSTATIC, owner, name, type);
+    }
+
+    /**
+      * Generates the instruction to push the value of a non static field on the stack.
+      *
+      * @param owner the class in which the field is defined.
+      * @param name the name of the field.
+      * @param type the type of the field.
+      */
+    public void getField(final Type owner, final String name, final Type type) {
+        fieldInsn(Opcodes.GETFIELD, owner, name, type);
+    }
+
+    /**
+      * Generates the instruction to store the top stack value in a non static field.
+      *
+      * @param owner the class in which the field is defined.
+      * @param name the name of the field.
+      * @param type the type of the field.
+      */
+    public void putField(final Type owner, final String name, final Type type) {
+        fieldInsn(Opcodes.PUTFIELD, owner, name, type);
+    }
+
+    // -----------------------------------------------------------------------------------------------
+    // Instructions to invoke methods
+    // -----------------------------------------------------------------------------------------------
+
+    /**
+      * Generates an invoke method instruction.
+      *
+      * @param opcode the instruction's opcode.
+      * @param type the class in which the method is defined.
+      * @param method the method to be invoked.
+      * @param isInterface whether the 'type' class is an interface or not.
+      */
+    private void invokeInsn(
+            final int opcode, final Type type, final Method method, final boolean isInterface) {
+        String owner = type.getSort() == Type.ARRAY ? type.getDescriptor() : type.getInternalName();
+        mv.visitMethodInsn(opcode, owner, method.getName(), method.getDescriptor(), isInterface);
+    }
+
+    /**
+      * Generates the instruction to invoke a normal method.
+      *
+      * @param owner the class in which the method is defined.
+      * @param method the method to be invoked.
+      */
+    public void invokeVirtual(final Type owner, final Method method) {
+        invokeInsn(Opcodes.INVOKEVIRTUAL, owner, method, false);
+    }
+
+    /**
+      * Generates the instruction to invoke a constructor.
+      *
+      * @param type the class in which the constructor is defined.
+      * @param method the constructor to be invoked.
+      */
+    public void invokeConstructor(final Type type, final Method method) {
+        invokeInsn(Opcodes.INVOKESPECIAL, type, method, false);
+    }
+
+    /**
+      * Generates the instruction to invoke a static method.
+      *
+      * @param owner the class in which the method is defined.
+      * @param method the method to be invoked.
+      */
+    public void invokeStatic(final Type owner, final Method method) {
+        invokeInsn(Opcodes.INVOKESTATIC, owner, method, false);
+    }
+
+    /**
+      * Generates the instruction to invoke an interface method.
+      *
+      * @param owner the class in which the method is defined.
+      * @param method the method to be invoked.
+      */
+    public void invokeInterface(final Type owner, final Method method) {
+        invokeInsn(Opcodes.INVOKEINTERFACE, owner, method, true);
+    }
+
+    /**
+      * Generates an invokedynamic instruction.
+      *
+      * @param name the method's name.
+      * @param descriptor the method's descriptor (see {@link Type}).
+      * @param bootstrapMethodHandle the bootstrap method.
+      * @param bootstrapMethodArguments the bootstrap method constant arguments. Each argument must be
+      *     an {@link Integer}, {@link Float}, {@link Long}, {@link Double}, {@link String}, {@link
+      *     Type} or {@link Handle} value. This method is allowed to modify the content of the array so
+      *     a caller should expect that this array may change.
+      */
+    public void invokeDynamic(
+            final String name,
+            final String descriptor,
+            final Handle bootstrapMethodHandle,
+            final Object... bootstrapMethodArguments) {
+        mv.visitInvokeDynamicInsn(name, descriptor, bootstrapMethodHandle, bootstrapMethodArguments);
+    }
+
+    // -----------------------------------------------------------------------------------------------
+    // Instructions to create objects and arrays
+    // -----------------------------------------------------------------------------------------------
+
+    /**
+      * Generates a type dependent instruction.
+      *
+      * @param opcode the instruction's opcode.
+      * @param type the instruction's operand.
+      */
+    private void typeInsn(final int opcode, final Type type) {
+        mv.visitTypeInsn(opcode, type.getInternalName());
+    }
+
+    /**
+      * Generates the instruction to create a new object.
+      *
+      * @param type the class of the object to be created.
+      */
+    public void newInstance(final Type type) {
+        typeInsn(Opcodes.NEW, type);
+    }
+
+    /**
+      * Generates the instruction to create a new array.
+      *
+      * @param type the type of the array elements.
+      */
+    public void newArray(final Type type) {
+        InstructionAdapter.newarray(mv, type);
+    }
+
+    // -----------------------------------------------------------------------------------------------
+    // Miscellaneous instructions
+    // -----------------------------------------------------------------------------------------------
+
+    /** Generates the instruction to compute the length of an array. */
+    public void arrayLength() {
+        mv.visitInsn(Opcodes.ARRAYLENGTH);
+    }
+
+    /** Generates the instruction to throw an exception. */
+    public void throwException() {
+        mv.visitInsn(Opcodes.ATHROW);
+    }
+
+    /**
+      * Generates the instructions to create and throw an exception. The exception class must have a
+      * constructor with a single String argument.
+      *
+      * @param type the class of the exception to be thrown.
+      * @param message the detailed message of the exception.
+      */
+    public void throwException(final Type type, final String message) {
+        newInstance(type);
+        dup();
+        push(message);
+        invokeConstructor(type, Method.getMethod("void <init> (String)"));
+        throwException();
+    }
+
+    /**
+      * Generates the instruction to check that the top stack value is of the given type.
+      *
+      * @param type a class or interface type.
+      */
+    public void checkCast(final Type type) {
+        if (!type.equals(OBJECT_TYPE)) {
+            typeInsn(Opcodes.CHECKCAST, type);
+        }
+    }
+
+    /**
+      * Generates the instruction to test if the top stack value is of the given type.
+      *
+      * @param type a class or interface type.
+      */
+    public void instanceOf(final Type type) {
+        typeInsn(Opcodes.INSTANCEOF, type);
+    }
+
+    /** Generates the instruction to get the monitor of the top stack value. */
+    public void monitorEnter() {
+        mv.visitInsn(Opcodes.MONITORENTER);
+    }
+
+    /** Generates the instruction to release the monitor of the top stack value. */
+    public void monitorExit() {
+        mv.visitInsn(Opcodes.MONITOREXIT);
+    }
+
+    // -----------------------------------------------------------------------------------------------
+    // Non instructions
+    // -----------------------------------------------------------------------------------------------
+
+    /** Marks the end of the visited method. */
+    public void endMethod() {
+        if ((access & Opcodes.ACC_ABSTRACT) == 0) {
+            mv.visitMaxs(0, 0);
+        }
+        mv.visitEnd();
+    }
+
+    /**
+      * Marks the start of an exception handler.
+      *
+      * @param start beginning of the exception handler's scope (inclusive).
+      * @param end end of the exception handler's scope (exclusive).
+      * @param exception internal name of the type of exceptions handled by the handler (see {@link
+      *     Type#getInternalName()}).
+      */
+    public void catchException(final Label start, final Label end, final Type exception) {
+        Label catchLabel = new Label();
+        if (exception == null) {
+            mv.visitTryCatchBlock(start, end, catchLabel, null);
+        } else {
+            mv.visitTryCatchBlock(start, end, catchLabel, exception.getInternalName());
+        }
+        mark(catchLabel);
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/org/objectweb/asm/commons/InstructionAdapter.class b/tests/test_data/std/jdk/internal/org/objectweb/asm/commons/InstructionAdapter.class
new file mode 100644
index 0000000000000000000000000000000000000000..738f8f9effdd4ed57818dec52c19ff0b73ae83cc
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HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/org/objectweb/asm/commons/InstructionAdapter.java b/tests/test_data/std/jdk/internal/org/objectweb/asm/commons/InstructionAdapter.java
new file mode 100644
index 00000000..e449c310
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/org/objectweb/asm/commons/InstructionAdapter.java
@@ -0,0 +1,1334 @@
+/*
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/*
+ * This file is available under and governed by the GNU General Public
+ * License version 2 only, as published by the Free Software Foundation.
+ * However, the following notice accompanied the original version of this
+ * file:
+ *
+ * ASM: a very small and fast Java bytecode manipulation framework
+ * Copyright (c) 2000-2011 INRIA, France Telecom
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the copyright holders nor the names of its
+ *    contributors may be used to endorse or promote products derived from
+ *    this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+package jdk.internal.org.objectweb.asm.commons;
+
+import jdk.internal.org.objectweb.asm.ConstantDynamic;
+import jdk.internal.org.objectweb.asm.Handle;
+import jdk.internal.org.objectweb.asm.Label;
+import jdk.internal.org.objectweb.asm.MethodVisitor;
+import jdk.internal.org.objectweb.asm.Opcodes;
+import jdk.internal.org.objectweb.asm.Type;
+
+/**
+ * A {@link MethodVisitor} providing a more detailed API to generate and transform instructions.
+ *
+ * @author Eric Bruneton
+ */
+public class InstructionAdapter extends MethodVisitor {
+
+    /** The type of the java.lang.Object class. */
+    public static final Type OBJECT_TYPE = Type.getType("Ljava/lang/Object;");
+
+    /**
+      * Constructs a new {@link InstructionAdapter}. <i>Subclasses must not use this constructor</i>.
+      * Instead, they must use the {@link #InstructionAdapter(int, MethodVisitor)} version.
+      *
+      * @param methodVisitor the method visitor to which this adapter delegates calls.
+      * @throws IllegalStateException If a subclass calls this constructor.
+      */
+    public InstructionAdapter(final MethodVisitor methodVisitor) {
+        this(/* latest api = */ Opcodes.ASM9, methodVisitor);
+        if (getClass() != InstructionAdapter.class) {
+            throw new IllegalStateException();
+        }
+    }
+
+    /**
+      * Constructs a new {@link InstructionAdapter}.
+      *
+      * @param api the ASM API version implemented by this visitor. Must be one of the {@code
+      *     ASM}<i>x</i> values in {@link Opcodes}.
+      * @param methodVisitor the method visitor to which this adapter delegates calls.
+      */
+    protected InstructionAdapter(final int api, final MethodVisitor methodVisitor) {
+        super(api, methodVisitor);
+    }
+
+    @Override
+    public void visitInsn(final int opcode) {
+        switch (opcode) {
+            case Opcodes.NOP:
+                nop();
+                break;
+            case Opcodes.ACONST_NULL:
+                aconst(null);
+                break;
+            case Opcodes.ICONST_M1:
+            case Opcodes.ICONST_0:
+            case Opcodes.ICONST_1:
+            case Opcodes.ICONST_2:
+            case Opcodes.ICONST_3:
+            case Opcodes.ICONST_4:
+            case Opcodes.ICONST_5:
+                iconst(opcode - Opcodes.ICONST_0);
+                break;
+            case Opcodes.LCONST_0:
+            case Opcodes.LCONST_1:
+                lconst((long) (opcode - Opcodes.LCONST_0));
+                break;
+            case Opcodes.FCONST_0:
+            case Opcodes.FCONST_1:
+            case Opcodes.FCONST_2:
+                fconst((float) (opcode - Opcodes.FCONST_0));
+                break;
+            case Opcodes.DCONST_0:
+            case Opcodes.DCONST_1:
+                dconst((double) (opcode - Opcodes.DCONST_0));
+                break;
+            case Opcodes.IALOAD:
+                aload(Type.INT_TYPE);
+                break;
+            case Opcodes.LALOAD:
+                aload(Type.LONG_TYPE);
+                break;
+            case Opcodes.FALOAD:
+                aload(Type.FLOAT_TYPE);
+                break;
+            case Opcodes.DALOAD:
+                aload(Type.DOUBLE_TYPE);
+                break;
+            case Opcodes.AALOAD:
+                aload(OBJECT_TYPE);
+                break;
+            case Opcodes.BALOAD:
+                aload(Type.BYTE_TYPE);
+                break;
+            case Opcodes.CALOAD:
+                aload(Type.CHAR_TYPE);
+                break;
+            case Opcodes.SALOAD:
+                aload(Type.SHORT_TYPE);
+                break;
+            case Opcodes.IASTORE:
+                astore(Type.INT_TYPE);
+                break;
+            case Opcodes.LASTORE:
+                astore(Type.LONG_TYPE);
+                break;
+            case Opcodes.FASTORE:
+                astore(Type.FLOAT_TYPE);
+                break;
+            case Opcodes.DASTORE:
+                astore(Type.DOUBLE_TYPE);
+                break;
+            case Opcodes.AASTORE:
+                astore(OBJECT_TYPE);
+                break;
+            case Opcodes.BASTORE:
+                astore(Type.BYTE_TYPE);
+                break;
+            case Opcodes.CASTORE:
+                astore(Type.CHAR_TYPE);
+                break;
+            case Opcodes.SASTORE:
+                astore(Type.SHORT_TYPE);
+                break;
+            case Opcodes.POP:
+                pop();
+                break;
+            case Opcodes.POP2:
+                pop2();
+                break;
+            case Opcodes.DUP:
+                dup();
+                break;
+            case Opcodes.DUP_X1:
+                dupX1();
+                break;
+            case Opcodes.DUP_X2:
+                dupX2();
+                break;
+            case Opcodes.DUP2:
+                dup2();
+                break;
+            case Opcodes.DUP2_X1:
+                dup2X1();
+                break;
+            case Opcodes.DUP2_X2:
+                dup2X2();
+                break;
+            case Opcodes.SWAP:
+                swap();
+                break;
+            case Opcodes.IADD:
+                add(Type.INT_TYPE);
+                break;
+            case Opcodes.LADD:
+                add(Type.LONG_TYPE);
+                break;
+            case Opcodes.FADD:
+                add(Type.FLOAT_TYPE);
+                break;
+            case Opcodes.DADD:
+                add(Type.DOUBLE_TYPE);
+                break;
+            case Opcodes.ISUB:
+                sub(Type.INT_TYPE);
+                break;
+            case Opcodes.LSUB:
+                sub(Type.LONG_TYPE);
+                break;
+            case Opcodes.FSUB:
+                sub(Type.FLOAT_TYPE);
+                break;
+            case Opcodes.DSUB:
+                sub(Type.DOUBLE_TYPE);
+                break;
+            case Opcodes.IMUL:
+                mul(Type.INT_TYPE);
+                break;
+            case Opcodes.LMUL:
+                mul(Type.LONG_TYPE);
+                break;
+            case Opcodes.FMUL:
+                mul(Type.FLOAT_TYPE);
+                break;
+            case Opcodes.DMUL:
+                mul(Type.DOUBLE_TYPE);
+                break;
+            case Opcodes.IDIV:
+                div(Type.INT_TYPE);
+                break;
+            case Opcodes.LDIV:
+                div(Type.LONG_TYPE);
+                break;
+            case Opcodes.FDIV:
+                div(Type.FLOAT_TYPE);
+                break;
+            case Opcodes.DDIV:
+                div(Type.DOUBLE_TYPE);
+                break;
+            case Opcodes.IREM:
+                rem(Type.INT_TYPE);
+                break;
+            case Opcodes.LREM:
+                rem(Type.LONG_TYPE);
+                break;
+            case Opcodes.FREM:
+                rem(Type.FLOAT_TYPE);
+                break;
+            case Opcodes.DREM:
+                rem(Type.DOUBLE_TYPE);
+                break;
+            case Opcodes.INEG:
+                neg(Type.INT_TYPE);
+                break;
+            case Opcodes.LNEG:
+                neg(Type.LONG_TYPE);
+                break;
+            case Opcodes.FNEG:
+                neg(Type.FLOAT_TYPE);
+                break;
+            case Opcodes.DNEG:
+                neg(Type.DOUBLE_TYPE);
+                break;
+            case Opcodes.ISHL:
+                shl(Type.INT_TYPE);
+                break;
+            case Opcodes.LSHL:
+                shl(Type.LONG_TYPE);
+                break;
+            case Opcodes.ISHR:
+                shr(Type.INT_TYPE);
+                break;
+            case Opcodes.LSHR:
+                shr(Type.LONG_TYPE);
+                break;
+            case Opcodes.IUSHR:
+                ushr(Type.INT_TYPE);
+                break;
+            case Opcodes.LUSHR:
+                ushr(Type.LONG_TYPE);
+                break;
+            case Opcodes.IAND:
+                and(Type.INT_TYPE);
+                break;
+            case Opcodes.LAND:
+                and(Type.LONG_TYPE);
+                break;
+            case Opcodes.IOR:
+                or(Type.INT_TYPE);
+                break;
+            case Opcodes.LOR:
+                or(Type.LONG_TYPE);
+                break;
+            case Opcodes.IXOR:
+                xor(Type.INT_TYPE);
+                break;
+            case Opcodes.LXOR:
+                xor(Type.LONG_TYPE);
+                break;
+            case Opcodes.I2L:
+                cast(Type.INT_TYPE, Type.LONG_TYPE);
+                break;
+            case Opcodes.I2F:
+                cast(Type.INT_TYPE, Type.FLOAT_TYPE);
+                break;
+            case Opcodes.I2D:
+                cast(Type.INT_TYPE, Type.DOUBLE_TYPE);
+                break;
+            case Opcodes.L2I:
+                cast(Type.LONG_TYPE, Type.INT_TYPE);
+                break;
+            case Opcodes.L2F:
+                cast(Type.LONG_TYPE, Type.FLOAT_TYPE);
+                break;
+            case Opcodes.L2D:
+                cast(Type.LONG_TYPE, Type.DOUBLE_TYPE);
+                break;
+            case Opcodes.F2I:
+                cast(Type.FLOAT_TYPE, Type.INT_TYPE);
+                break;
+            case Opcodes.F2L:
+                cast(Type.FLOAT_TYPE, Type.LONG_TYPE);
+                break;
+            case Opcodes.F2D:
+                cast(Type.FLOAT_TYPE, Type.DOUBLE_TYPE);
+                break;
+            case Opcodes.D2I:
+                cast(Type.DOUBLE_TYPE, Type.INT_TYPE);
+                break;
+            case Opcodes.D2L:
+                cast(Type.DOUBLE_TYPE, Type.LONG_TYPE);
+                break;
+            case Opcodes.D2F:
+                cast(Type.DOUBLE_TYPE, Type.FLOAT_TYPE);
+                break;
+            case Opcodes.I2B:
+                cast(Type.INT_TYPE, Type.BYTE_TYPE);
+                break;
+            case Opcodes.I2C:
+                cast(Type.INT_TYPE, Type.CHAR_TYPE);
+                break;
+            case Opcodes.I2S:
+                cast(Type.INT_TYPE, Type.SHORT_TYPE);
+                break;
+            case Opcodes.LCMP:
+                lcmp();
+                break;
+            case Opcodes.FCMPL:
+                cmpl(Type.FLOAT_TYPE);
+                break;
+            case Opcodes.FCMPG:
+                cmpg(Type.FLOAT_TYPE);
+                break;
+            case Opcodes.DCMPL:
+                cmpl(Type.DOUBLE_TYPE);
+                break;
+            case Opcodes.DCMPG:
+                cmpg(Type.DOUBLE_TYPE);
+                break;
+            case Opcodes.IRETURN:
+                areturn(Type.INT_TYPE);
+                break;
+            case Opcodes.LRETURN:
+                areturn(Type.LONG_TYPE);
+                break;
+            case Opcodes.FRETURN:
+                areturn(Type.FLOAT_TYPE);
+                break;
+            case Opcodes.DRETURN:
+                areturn(Type.DOUBLE_TYPE);
+                break;
+            case Opcodes.ARETURN:
+                areturn(OBJECT_TYPE);
+                break;
+            case Opcodes.RETURN:
+                areturn(Type.VOID_TYPE);
+                break;
+            case Opcodes.ARRAYLENGTH:
+                arraylength();
+                break;
+            case Opcodes.ATHROW:
+                athrow();
+                break;
+            case Opcodes.MONITORENTER:
+                monitorenter();
+                break;
+            case Opcodes.MONITOREXIT:
+                monitorexit();
+                break;
+            default:
+                throw new IllegalArgumentException();
+        }
+    }
+
+    @Override
+    public void visitIntInsn(final int opcode, final int operand) {
+        switch (opcode) {
+            case Opcodes.BIPUSH:
+                iconst(operand);
+                break;
+            case Opcodes.SIPUSH:
+                iconst(operand);
+                break;
+            case Opcodes.NEWARRAY:
+                switch (operand) {
+                    case Opcodes.T_BOOLEAN:
+                        newarray(Type.BOOLEAN_TYPE);
+                        break;
+                    case Opcodes.T_CHAR:
+                        newarray(Type.CHAR_TYPE);
+                        break;
+                    case Opcodes.T_BYTE:
+                        newarray(Type.BYTE_TYPE);
+                        break;
+                    case Opcodes.T_SHORT:
+                        newarray(Type.SHORT_TYPE);
+                        break;
+                    case Opcodes.T_INT:
+                        newarray(Type.INT_TYPE);
+                        break;
+                    case Opcodes.T_FLOAT:
+                        newarray(Type.FLOAT_TYPE);
+                        break;
+                    case Opcodes.T_LONG:
+                        newarray(Type.LONG_TYPE);
+                        break;
+                    case Opcodes.T_DOUBLE:
+                        newarray(Type.DOUBLE_TYPE);
+                        break;
+                    default:
+                        throw new IllegalArgumentException();
+                }
+                break;
+            default:
+                throw new IllegalArgumentException();
+        }
+    }
+
+    @Override
+    public void visitVarInsn(final int opcode, final int varIndex) {
+        switch (opcode) {
+            case Opcodes.ILOAD:
+                load(varIndex, Type.INT_TYPE);
+                break;
+            case Opcodes.LLOAD:
+                load(varIndex, Type.LONG_TYPE);
+                break;
+            case Opcodes.FLOAD:
+                load(varIndex, Type.FLOAT_TYPE);
+                break;
+            case Opcodes.DLOAD:
+                load(varIndex, Type.DOUBLE_TYPE);
+                break;
+            case Opcodes.ALOAD:
+                load(varIndex, OBJECT_TYPE);
+                break;
+            case Opcodes.ISTORE:
+                store(varIndex, Type.INT_TYPE);
+                break;
+            case Opcodes.LSTORE:
+                store(varIndex, Type.LONG_TYPE);
+                break;
+            case Opcodes.FSTORE:
+                store(varIndex, Type.FLOAT_TYPE);
+                break;
+            case Opcodes.DSTORE:
+                store(varIndex, Type.DOUBLE_TYPE);
+                break;
+            case Opcodes.ASTORE:
+                store(varIndex, OBJECT_TYPE);
+                break;
+            case Opcodes.RET:
+                ret(varIndex);
+                break;
+            default:
+                throw new IllegalArgumentException();
+        }
+    }
+
+    @Override
+    public void visitTypeInsn(final int opcode, final String type) {
+        Type objectType = Type.getObjectType(type);
+        switch (opcode) {
+            case Opcodes.NEW:
+                anew(objectType);
+                break;
+            case Opcodes.ANEWARRAY:
+                newarray(objectType);
+                break;
+            case Opcodes.CHECKCAST:
+                checkcast(objectType);
+                break;
+            case Opcodes.INSTANCEOF:
+                instanceOf(objectType);
+                break;
+            default:
+                throw new IllegalArgumentException();
+        }
+    }
+
+    @Override
+    public void visitFieldInsn(
+            final int opcode, final String owner, final String name, final String descriptor) {
+        switch (opcode) {
+            case Opcodes.GETSTATIC:
+                getstatic(owner, name, descriptor);
+                break;
+            case Opcodes.PUTSTATIC:
+                putstatic(owner, name, descriptor);
+                break;
+            case Opcodes.GETFIELD:
+                getfield(owner, name, descriptor);
+                break;
+            case Opcodes.PUTFIELD:
+                putfield(owner, name, descriptor);
+                break;
+            default:
+                throw new IllegalArgumentException();
+        }
+    }
+
+    @Override
+    public void visitMethodInsn(
+            final int opcodeAndSource,
+            final String owner,
+            final String name,
+            final String descriptor,
+            final boolean isInterface) {
+        if (api < Opcodes.ASM5 && (opcodeAndSource & Opcodes.SOURCE_DEPRECATED) == 0) {
+            // Redirect the call to the deprecated version of this method.
+            super.visitMethodInsn(opcodeAndSource, owner, name, descriptor, isInterface);
+            return;
+        }
+        int opcode = opcodeAndSource & ~Opcodes.SOURCE_MASK;
+
+        switch (opcode) {
+            case Opcodes.INVOKESPECIAL:
+                invokespecial(owner, name, descriptor, isInterface);
+                break;
+            case Opcodes.INVOKEVIRTUAL:
+                invokevirtual(owner, name, descriptor, isInterface);
+                break;
+            case Opcodes.INVOKESTATIC:
+                invokestatic(owner, name, descriptor, isInterface);
+                break;
+            case Opcodes.INVOKEINTERFACE:
+                invokeinterface(owner, name, descriptor);
+                break;
+            default:
+                throw new IllegalArgumentException();
+        }
+    }
+
+    @Override
+    public void visitInvokeDynamicInsn(
+            final String name,
+            final String descriptor,
+            final Handle bootstrapMethodHandle,
+            final Object... bootstrapMethodArguments) {
+        invokedynamic(name, descriptor, bootstrapMethodHandle, bootstrapMethodArguments);
+    }
+
+    @Override
+    public void visitJumpInsn(final int opcode, final Label label) {
+        switch (opcode) {
+            case Opcodes.IFEQ:
+                ifeq(label);
+                break;
+            case Opcodes.IFNE:
+                ifne(label);
+                break;
+            case Opcodes.IFLT:
+                iflt(label);
+                break;
+            case Opcodes.IFGE:
+                ifge(label);
+                break;
+            case Opcodes.IFGT:
+                ifgt(label);
+                break;
+            case Opcodes.IFLE:
+                ifle(label);
+                break;
+            case Opcodes.IF_ICMPEQ:
+                ificmpeq(label);
+                break;
+            case Opcodes.IF_ICMPNE:
+                ificmpne(label);
+                break;
+            case Opcodes.IF_ICMPLT:
+                ificmplt(label);
+                break;
+            case Opcodes.IF_ICMPGE:
+                ificmpge(label);
+                break;
+            case Opcodes.IF_ICMPGT:
+                ificmpgt(label);
+                break;
+            case Opcodes.IF_ICMPLE:
+                ificmple(label);
+                break;
+            case Opcodes.IF_ACMPEQ:
+                ifacmpeq(label);
+                break;
+            case Opcodes.IF_ACMPNE:
+                ifacmpne(label);
+                break;
+            case Opcodes.GOTO:
+                goTo(label);
+                break;
+            case Opcodes.JSR:
+                jsr(label);
+                break;
+            case Opcodes.IFNULL:
+                ifnull(label);
+                break;
+            case Opcodes.IFNONNULL:
+                ifnonnull(label);
+                break;
+            default:
+                throw new IllegalArgumentException();
+        }
+    }
+
+    @Override
+    public void visitLabel(final Label label) {
+        mark(label);
+    }
+
+    @Override
+    public void visitLdcInsn(final Object value) {
+        if (api < Opcodes.ASM5
+                && (value instanceof Handle
+                        || (value instanceof Type && ((Type) value).getSort() == Type.METHOD))) {
+            throw new UnsupportedOperationException("This feature requires ASM5");
+        }
+        if (api < Opcodes.ASM7 && value instanceof ConstantDynamic) {
+            throw new UnsupportedOperationException("This feature requires ASM7");
+        }
+        if (value instanceof Integer) {
+            iconst((Integer) value);
+        } else if (value instanceof Byte) {
+            iconst(((Byte) value).intValue());
+        } else if (value instanceof Character) {
+            iconst(((Character) value).charValue());
+        } else if (value instanceof Short) {
+            iconst(((Short) value).intValue());
+        } else if (value instanceof Boolean) {
+            iconst(((Boolean) value).booleanValue() ? 1 : 0);
+        } else if (value instanceof Float) {
+            fconst((Float) value);
+        } else if (value instanceof Long) {
+            lconst((Long) value);
+        } else if (value instanceof Double) {
+            dconst((Double) value);
+        } else if (value instanceof String) {
+            aconst(value);
+        } else if (value instanceof Type) {
+            tconst((Type) value);
+        } else if (value instanceof Handle) {
+            hconst((Handle) value);
+        } else if (value instanceof ConstantDynamic) {
+            cconst((ConstantDynamic) value);
+        } else {
+            throw new IllegalArgumentException();
+        }
+    }
+
+    @Override
+    public void visitIincInsn(final int varIndex, final int increment) {
+        iinc(varIndex, increment);
+    }
+
+    @Override
+    public void visitTableSwitchInsn(
+            final int min, final int max, final Label dflt, final Label... labels) {
+        tableswitch(min, max, dflt, labels);
+    }
+
+    @Override
+    public void visitLookupSwitchInsn(final Label dflt, final int[] keys, final Label[] labels) {
+        lookupswitch(dflt, keys, labels);
+    }
+
+    @Override
+    public void visitMultiANewArrayInsn(final String descriptor, final int numDimensions) {
+        multianewarray(descriptor, numDimensions);
+    }
+
+    // -----------------------------------------------------------------------------------------------
+
+    /** Generates a nop instruction. */
+    public void nop() {
+        mv.visitInsn(Opcodes.NOP);
+    }
+
+    /**
+      * Generates the instruction to push the given value on the stack.
+      *
+      * @param value the constant to be pushed on the stack. This parameter must be an {@link Integer},
+      *     a {@link Float}, a {@link Long}, a {@link Double}, a {@link String}, a {@link Type} of
+      *     OBJECT or ARRAY sort for {@code .class} constants, for classes whose version is 49, a
+      *     {@link Type} of METHOD sort for MethodType, a {@link Handle} for MethodHandle constants,
+      *     for classes whose version is 51 or a {@link ConstantDynamic} for a constant dynamic for
+      *     classes whose version is 55.
+      */
+    public void aconst(final Object value) {
+        if (value == null) {
+            mv.visitInsn(Opcodes.ACONST_NULL);
+        } else {
+            mv.visitLdcInsn(value);
+        }
+    }
+
+    /**
+      * Generates the instruction to push the given value on the stack.
+      *
+      * @param intValue the constant to be pushed on the stack.
+      */
+    public void iconst(final int intValue) {
+        if (intValue >= -1 && intValue <= 5) {
+            mv.visitInsn(Opcodes.ICONST_0 + intValue);
+        } else if (intValue >= Byte.MIN_VALUE && intValue <= Byte.MAX_VALUE) {
+            mv.visitIntInsn(Opcodes.BIPUSH, intValue);
+        } else if (intValue >= Short.MIN_VALUE && intValue <= Short.MAX_VALUE) {
+            mv.visitIntInsn(Opcodes.SIPUSH, intValue);
+        } else {
+            mv.visitLdcInsn(intValue);
+        }
+    }
+
+    /**
+      * Generates the instruction to push the given value on the stack.
+      *
+      * @param longValue the constant to be pushed on the stack.
+      */
+    public void lconst(final long longValue) {
+        if (longValue == 0L || longValue == 1L) {
+            mv.visitInsn(Opcodes.LCONST_0 + (int) longValue);
+        } else {
+            mv.visitLdcInsn(longValue);
+        }
+    }
+
+    /**
+      * Generates the instruction to push the given value on the stack.
+      *
+      * @param floatValue the constant to be pushed on the stack.
+      */
+    public void fconst(final float floatValue) {
+        int bits = Float.floatToIntBits(floatValue);
+        if (bits == 0L || bits == 0x3F800000 || bits == 0x40000000) { // 0..2
+            mv.visitInsn(Opcodes.FCONST_0 + (int) floatValue);
+        } else {
+            mv.visitLdcInsn(floatValue);
+        }
+    }
+
+    /**
+      * Generates the instruction to push the given value on the stack.
+      *
+      * @param doubleValue the constant to be pushed on the stack.
+      */
+    public void dconst(final double doubleValue) {
+        long bits = Double.doubleToLongBits(doubleValue);
+        if (bits == 0L || bits == 0x3FF0000000000000L) { // +0.0d and 1.0d
+            mv.visitInsn(Opcodes.DCONST_0 + (int) doubleValue);
+        } else {
+            mv.visitLdcInsn(doubleValue);
+        }
+    }
+
+    /**
+      * Generates the instruction to push the given type on the stack.
+      *
+      * @param type the type to be pushed on the stack.
+      */
+    public void tconst(final Type type) {
+        mv.visitLdcInsn(type);
+    }
+
+    /**
+      * Generates the instruction to push the given handle on the stack.
+      *
+      * @param handle the handle to be pushed on the stack.
+      */
+    public void hconst(final Handle handle) {
+        mv.visitLdcInsn(handle);
+    }
+
+    /**
+      * Generates the instruction to push the given constant dynamic on the stack.
+      *
+      * @param constantDynamic the constant dynamic to be pushed on the stack.
+      */
+    public void cconst(final ConstantDynamic constantDynamic) {
+        mv.visitLdcInsn(constantDynamic);
+    }
+
+    public void load(final int varIndex, final Type type) {
+        mv.visitVarInsn(type.getOpcode(Opcodes.ILOAD), varIndex);
+    }
+
+    public void aload(final Type type) {
+        mv.visitInsn(type.getOpcode(Opcodes.IALOAD));
+    }
+
+    public void store(final int varIndex, final Type type) {
+        mv.visitVarInsn(type.getOpcode(Opcodes.ISTORE), varIndex);
+    }
+
+    public void astore(final Type type) {
+        mv.visitInsn(type.getOpcode(Opcodes.IASTORE));
+    }
+
+    public void pop() {
+        mv.visitInsn(Opcodes.POP);
+    }
+
+    public void pop2() {
+        mv.visitInsn(Opcodes.POP2);
+    }
+
+    public void dup() {
+        mv.visitInsn(Opcodes.DUP);
+    }
+
+    public void dup2() {
+        mv.visitInsn(Opcodes.DUP2);
+    }
+
+    public void dupX1() {
+        mv.visitInsn(Opcodes.DUP_X1);
+    }
+
+    public void dupX2() {
+        mv.visitInsn(Opcodes.DUP_X2);
+    }
+
+    public void dup2X1() {
+        mv.visitInsn(Opcodes.DUP2_X1);
+    }
+
+    public void dup2X2() {
+        mv.visitInsn(Opcodes.DUP2_X2);
+    }
+
+    public void swap() {
+        mv.visitInsn(Opcodes.SWAP);
+    }
+
+    public void add(final Type type) {
+        mv.visitInsn(type.getOpcode(Opcodes.IADD));
+    }
+
+    public void sub(final Type type) {
+        mv.visitInsn(type.getOpcode(Opcodes.ISUB));
+    }
+
+    public void mul(final Type type) {
+        mv.visitInsn(type.getOpcode(Opcodes.IMUL));
+    }
+
+    public void div(final Type type) {
+        mv.visitInsn(type.getOpcode(Opcodes.IDIV));
+    }
+
+    public void rem(final Type type) {
+        mv.visitInsn(type.getOpcode(Opcodes.IREM));
+    }
+
+    public void neg(final Type type) {
+        mv.visitInsn(type.getOpcode(Opcodes.INEG));
+    }
+
+    public void shl(final Type type) {
+        mv.visitInsn(type.getOpcode(Opcodes.ISHL));
+    }
+
+    public void shr(final Type type) {
+        mv.visitInsn(type.getOpcode(Opcodes.ISHR));
+    }
+
+    public void ushr(final Type type) {
+        mv.visitInsn(type.getOpcode(Opcodes.IUSHR));
+    }
+
+    public void and(final Type type) {
+        mv.visitInsn(type.getOpcode(Opcodes.IAND));
+    }
+
+    public void or(final Type type) {
+        mv.visitInsn(type.getOpcode(Opcodes.IOR));
+    }
+
+    public void xor(final Type type) {
+        mv.visitInsn(type.getOpcode(Opcodes.IXOR));
+    }
+
+    public void iinc(final int varIndex, final int increment) {
+        mv.visitIincInsn(varIndex, increment);
+    }
+
+    /**
+      * Generates the instruction to cast from the first given type to the other.
+      *
+      * @param from a Type.
+      * @param to a Type.
+      */
+    public void cast(final Type from, final Type to) {
+        cast(mv, from, to);
+    }
+
+    /**
+      * Generates the instruction to cast from the first given type to the other.
+      *
+      * @param methodVisitor the method visitor to use to generate the instruction.
+      * @param from a Type.
+      * @param to a Type.
+      */
+    static void cast(final MethodVisitor methodVisitor, final Type from, final Type to) {
+        if (from != to) {
+            if (from == Type.DOUBLE_TYPE) {
+                if (to == Type.FLOAT_TYPE) {
+                    methodVisitor.visitInsn(Opcodes.D2F);
+                } else if (to == Type.LONG_TYPE) {
+                    methodVisitor.visitInsn(Opcodes.D2L);
+                } else {
+                    methodVisitor.visitInsn(Opcodes.D2I);
+                    cast(methodVisitor, Type.INT_TYPE, to);
+                }
+            } else if (from == Type.FLOAT_TYPE) {
+                if (to == Type.DOUBLE_TYPE) {
+                    methodVisitor.visitInsn(Opcodes.F2D);
+                } else if (to == Type.LONG_TYPE) {
+                    methodVisitor.visitInsn(Opcodes.F2L);
+                } else {
+                    methodVisitor.visitInsn(Opcodes.F2I);
+                    cast(methodVisitor, Type.INT_TYPE, to);
+                }
+            } else if (from == Type.LONG_TYPE) {
+                if (to == Type.DOUBLE_TYPE) {
+                    methodVisitor.visitInsn(Opcodes.L2D);
+                } else if (to == Type.FLOAT_TYPE) {
+                    methodVisitor.visitInsn(Opcodes.L2F);
+                } else {
+                    methodVisitor.visitInsn(Opcodes.L2I);
+                    cast(methodVisitor, Type.INT_TYPE, to);
+                }
+            } else {
+                if (to == Type.BYTE_TYPE) {
+                    methodVisitor.visitInsn(Opcodes.I2B);
+                } else if (to == Type.CHAR_TYPE) {
+                    methodVisitor.visitInsn(Opcodes.I2C);
+                } else if (to == Type.DOUBLE_TYPE) {
+                    methodVisitor.visitInsn(Opcodes.I2D);
+                } else if (to == Type.FLOAT_TYPE) {
+                    methodVisitor.visitInsn(Opcodes.I2F);
+                } else if (to == Type.LONG_TYPE) {
+                    methodVisitor.visitInsn(Opcodes.I2L);
+                } else if (to == Type.SHORT_TYPE) {
+                    methodVisitor.visitInsn(Opcodes.I2S);
+                }
+            }
+        }
+    }
+
+    public void lcmp() {
+        mv.visitInsn(Opcodes.LCMP);
+    }
+
+    public void cmpl(final Type type) {
+        mv.visitInsn(type == Type.FLOAT_TYPE ? Opcodes.FCMPL : Opcodes.DCMPL);
+    }
+
+    public void cmpg(final Type type) {
+        mv.visitInsn(type == Type.FLOAT_TYPE ? Opcodes.FCMPG : Opcodes.DCMPG);
+    }
+
+    public void ifeq(final Label label) {
+        mv.visitJumpInsn(Opcodes.IFEQ, label);
+    }
+
+    public void ifne(final Label label) {
+        mv.visitJumpInsn(Opcodes.IFNE, label);
+    }
+
+    public void iflt(final Label label) {
+        mv.visitJumpInsn(Opcodes.IFLT, label);
+    }
+
+    public void ifge(final Label label) {
+        mv.visitJumpInsn(Opcodes.IFGE, label);
+    }
+
+    public void ifgt(final Label label) {
+        mv.visitJumpInsn(Opcodes.IFGT, label);
+    }
+
+    public void ifle(final Label label) {
+        mv.visitJumpInsn(Opcodes.IFLE, label);
+    }
+
+    public void ificmpeq(final Label label) {
+        mv.visitJumpInsn(Opcodes.IF_ICMPEQ, label);
+    }
+
+    public void ificmpne(final Label label) {
+        mv.visitJumpInsn(Opcodes.IF_ICMPNE, label);
+    }
+
+    public void ificmplt(final Label label) {
+        mv.visitJumpInsn(Opcodes.IF_ICMPLT, label);
+    }
+
+    public void ificmpge(final Label label) {
+        mv.visitJumpInsn(Opcodes.IF_ICMPGE, label);
+    }
+
+    public void ificmpgt(final Label label) {
+        mv.visitJumpInsn(Opcodes.IF_ICMPGT, label);
+    }
+
+    public void ificmple(final Label label) {
+        mv.visitJumpInsn(Opcodes.IF_ICMPLE, label);
+    }
+
+    public void ifacmpeq(final Label label) {
+        mv.visitJumpInsn(Opcodes.IF_ACMPEQ, label);
+    }
+
+    public void ifacmpne(final Label label) {
+        mv.visitJumpInsn(Opcodes.IF_ACMPNE, label);
+    }
+
+    public void goTo(final Label label) {
+        mv.visitJumpInsn(Opcodes.GOTO, label);
+    }
+
+    public void jsr(final Label label) {
+        mv.visitJumpInsn(Opcodes.JSR, label);
+    }
+
+    public void ret(final int varIndex) {
+        mv.visitVarInsn(Opcodes.RET, varIndex);
+    }
+
+    public void tableswitch(final int min, final int max, final Label dflt, final Label... labels) {
+        mv.visitTableSwitchInsn(min, max, dflt, labels);
+    }
+
+    public void lookupswitch(final Label dflt, final int[] keys, final Label[] labels) {
+        mv.visitLookupSwitchInsn(dflt, keys, labels);
+    }
+
+    public void areturn(final Type type) {
+        mv.visitInsn(type.getOpcode(Opcodes.IRETURN));
+    }
+
+    public void getstatic(final String owner, final String name, final String descriptor) {
+        mv.visitFieldInsn(Opcodes.GETSTATIC, owner, name, descriptor);
+    }
+
+    public void putstatic(final String owner, final String name, final String descriptor) {
+        mv.visitFieldInsn(Opcodes.PUTSTATIC, owner, name, descriptor);
+    }
+
+    public void getfield(final String owner, final String name, final String descriptor) {
+        mv.visitFieldInsn(Opcodes.GETFIELD, owner, name, descriptor);
+    }
+
+    public void putfield(final String owner, final String name, final String descriptor) {
+        mv.visitFieldInsn(Opcodes.PUTFIELD, owner, name, descriptor);
+    }
+
+    /**
+      * Deprecated.
+      *
+      * @param owner the internal name of the method's owner class (see {@link
+      *     Type#getInternalName()}).
+      * @param name the method's name.
+      * @param descriptor the method's descriptor (see {@link Type}).
+      * @deprecated use {@link #invokevirtual(String, String, String, boolean)} instead.
+      */
+    @Deprecated
+    public void invokevirtual(final String owner, final String name, final String descriptor) {
+        if (api >= Opcodes.ASM5) {
+            invokevirtual(owner, name, descriptor, false);
+            return;
+        }
+        mv.visitMethodInsn(Opcodes.INVOKEVIRTUAL, owner, name, descriptor);
+    }
+
+    /**
+      * Generates the instruction to call the given virtual method.
+      *
+      * @param owner the internal name of the method's owner class (see {@link
+      *     Type#getInternalName()}).
+      * @param name the method's name.
+      * @param descriptor the method's descriptor (see {@link Type}).
+      * @param isInterface if the method's owner class is an interface.
+      */
+    public void invokevirtual(
+            final String owner, final String name, final String descriptor, final boolean isInterface) {
+        if (api < Opcodes.ASM5) {
+            if (isInterface) {
+                throw new UnsupportedOperationException("INVOKEVIRTUAL on interfaces require ASM 5");
+            }
+            invokevirtual(owner, name, descriptor);
+            return;
+        }
+        mv.visitMethodInsn(Opcodes.INVOKEVIRTUAL, owner, name, descriptor, isInterface);
+    }
+
+    /**
+      * Deprecated.
+      *
+      * @param owner the internal name of the method's owner class (see {@link
+      *     Type#getInternalName()}).
+      * @param name the method's name.
+      * @param descriptor the method's descriptor (see {@link Type}).
+      * @deprecated use {@link #invokespecial(String, String, String, boolean)} instead.
+      */
+    @Deprecated
+    public void invokespecial(final String owner, final String name, final String descriptor) {
+        if (api >= Opcodes.ASM5) {
+            invokespecial(owner, name, descriptor, false);
+            return;
+        }
+        mv.visitMethodInsn(Opcodes.INVOKESPECIAL, owner, name, descriptor, false);
+    }
+
+    /**
+      * Generates the instruction to call the given special method.
+      *
+      * @param owner the internal name of the method's owner class (see {@link
+      *     Type#getInternalName()}).
+      * @param name the method's name.
+      * @param descriptor the method's descriptor (see {@link Type}).
+      * @param isInterface if the method's owner class is an interface.
+      */
+    public void invokespecial(
+            final String owner, final String name, final String descriptor, final boolean isInterface) {
+        if (api < Opcodes.ASM5) {
+            if (isInterface) {
+                throw new UnsupportedOperationException("INVOKESPECIAL on interfaces require ASM 5");
+            }
+            invokespecial(owner, name, descriptor);
+            return;
+        }
+        mv.visitMethodInsn(Opcodes.INVOKESPECIAL, owner, name, descriptor, isInterface);
+    }
+
+    /**
+      * Deprecated.
+      *
+      * @param owner the internal name of the method's owner class (see {@link
+      *     Type#getInternalName()}).
+      * @param name the method's name.
+      * @param descriptor the method's descriptor (see {@link Type}).
+      * @deprecated use {@link #invokestatic(String, String, String, boolean)} instead.
+      */
+    @Deprecated
+    public void invokestatic(final String owner, final String name, final String descriptor) {
+        if (api >= Opcodes.ASM5) {
+            invokestatic(owner, name, descriptor, false);
+            return;
+        }
+        mv.visitMethodInsn(Opcodes.INVOKESTATIC, owner, name, descriptor, false);
+    }
+
+    /**
+      * Generates the instruction to call the given static method.
+      *
+      * @param owner the internal name of the method's owner class (see {@link
+      *     Type#getInternalName()}).
+      * @param name the method's name.
+      * @param descriptor the method's descriptor (see {@link Type}).
+      * @param isInterface if the method's owner class is an interface.
+      */
+    public void invokestatic(
+            final String owner, final String name, final String descriptor, final boolean isInterface) {
+        if (api < Opcodes.ASM5) {
+            if (isInterface) {
+                throw new UnsupportedOperationException("INVOKESTATIC on interfaces require ASM 5");
+            }
+            invokestatic(owner, name, descriptor);
+            return;
+        }
+        mv.visitMethodInsn(Opcodes.INVOKESTATIC, owner, name, descriptor, isInterface);
+    }
+
+    /**
+      * Generates the instruction to call the given interface method.
+      *
+      * @param owner the internal name of the method's owner class (see {@link
+      *     Type#getInternalName()}).
+      * @param name the method's name.
+      * @param descriptor the method's descriptor (see {@link Type}).
+      */
+    public void invokeinterface(final String owner, final String name, final String descriptor) {
+        mv.visitMethodInsn(Opcodes.INVOKEINTERFACE, owner, name, descriptor, true);
+    }
+
+    /**
+      * Generates the instruction to call the given dynamic method.
+      *
+      * @param name the method's name.
+      * @param descriptor the method's descriptor (see {@link Type}).
+      * @param bootstrapMethodHandle the bootstrap method.
+      * @param bootstrapMethodArguments the bootstrap method constant arguments. Each argument must be
+      *     an {@link Integer}, {@link Float}, {@link Long}, {@link Double}, {@link String}, {@link
+      *     Type}, {@link Handle} or {@link ConstantDynamic} value. This method is allowed to modify
+      *     the content of the array so a caller should expect that this array may change.
+      */
+    public void invokedynamic(
+            final String name,
+            final String descriptor,
+            final Handle bootstrapMethodHandle,
+            final Object[] bootstrapMethodArguments) {
+        mv.visitInvokeDynamicInsn(name, descriptor, bootstrapMethodHandle, bootstrapMethodArguments);
+    }
+
+    public void anew(final Type type) {
+        mv.visitTypeInsn(Opcodes.NEW, type.getInternalName());
+    }
+
+    /**
+      * Generates the instruction to create and push on the stack an array of the given type.
+      *
+      * @param type an array Type.
+      */
+    public void newarray(final Type type) {
+        newarray(mv, type);
+    }
+
+    /**
+      * Generates the instruction to create and push on the stack an array of the given type.
+      *
+      * @param methodVisitor the method visitor to use to generate the instruction.
+      * @param type an array Type.
+      */
+    static void newarray(final MethodVisitor methodVisitor, final Type type) {
+        int arrayType;
+        switch (type.getSort()) {
+            case Type.BOOLEAN:
+                arrayType = Opcodes.T_BOOLEAN;
+                break;
+            case Type.CHAR:
+                arrayType = Opcodes.T_CHAR;
+                break;
+            case Type.BYTE:
+                arrayType = Opcodes.T_BYTE;
+                break;
+            case Type.SHORT:
+                arrayType = Opcodes.T_SHORT;
+                break;
+            case Type.INT:
+                arrayType = Opcodes.T_INT;
+                break;
+            case Type.FLOAT:
+                arrayType = Opcodes.T_FLOAT;
+                break;
+            case Type.LONG:
+                arrayType = Opcodes.T_LONG;
+                break;
+            case Type.DOUBLE:
+                arrayType = Opcodes.T_DOUBLE;
+                break;
+            default:
+                methodVisitor.visitTypeInsn(Opcodes.ANEWARRAY, type.getInternalName());
+                return;
+        }
+        methodVisitor.visitIntInsn(Opcodes.NEWARRAY, arrayType);
+    }
+
+    public void arraylength() {
+        mv.visitInsn(Opcodes.ARRAYLENGTH);
+    }
+
+    public void athrow() {
+        mv.visitInsn(Opcodes.ATHROW);
+    }
+
+    public void checkcast(final Type type) {
+        mv.visitTypeInsn(Opcodes.CHECKCAST, type.getInternalName());
+    }
+
+    public void instanceOf(final Type type) {
+        mv.visitTypeInsn(Opcodes.INSTANCEOF, type.getInternalName());
+    }
+
+    public void monitorenter() {
+        mv.visitInsn(Opcodes.MONITORENTER);
+    }
+
+    public void monitorexit() {
+        mv.visitInsn(Opcodes.MONITOREXIT);
+    }
+
+    public void multianewarray(final String descriptor, final int numDimensions) {
+        mv.visitMultiANewArrayInsn(descriptor, numDimensions);
+    }
+
+    public void ifnull(final Label label) {
+        mv.visitJumpInsn(Opcodes.IFNULL, label);
+    }
+
+    public void ifnonnull(final Label label) {
+        mv.visitJumpInsn(Opcodes.IFNONNULL, label);
+    }
+
+    public void mark(final Label label) {
+        mv.visitLabel(label);
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/org/objectweb/asm/commons/JSRInlinerAdapter$Instantiation.class b/tests/test_data/std/jdk/internal/org/objectweb/asm/commons/JSRInlinerAdapter$Instantiation.class
new file mode 100644
index 0000000000000000000000000000000000000000..af2349a93b3bdc10d3808fe04026d97d585e1f05
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diff --git a/tests/test_data/std/jdk/internal/org/objectweb/asm/commons/JSRInlinerAdapter.java b/tests/test_data/std/jdk/internal/org/objectweb/asm/commons/JSRInlinerAdapter.java
new file mode 100644
index 00000000..2f156522
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/org/objectweb/asm/commons/JSRInlinerAdapter.java
@@ -0,0 +1,604 @@
+/*
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/*
+ * This file is available under and governed by the GNU General Public
+ * License version 2 only, as published by the Free Software Foundation.
+ * However, the following notice accompanied the original version of this
+ * file:
+ *
+ * ASM: a very small and fast Java bytecode manipulation framework
+ * Copyright (c) 2000-2011 INRIA, France Telecom
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the copyright holders nor the names of its
+ *    contributors may be used to endorse or promote products derived from
+ *    this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+package jdk.internal.org.objectweb.asm.commons;
+
+import java.util.AbstractMap;
+import java.util.ArrayList;
+import java.util.BitSet;
+import java.util.HashMap;
+import java.util.LinkedList;
+import java.util.List;
+import java.util.Map;
+import java.util.Set;
+import jdk.internal.org.objectweb.asm.Label;
+import jdk.internal.org.objectweb.asm.MethodVisitor;
+import jdk.internal.org.objectweb.asm.Opcodes;
+import jdk.internal.org.objectweb.asm.tree.AbstractInsnNode;
+import jdk.internal.org.objectweb.asm.tree.InsnList;
+import jdk.internal.org.objectweb.asm.tree.InsnNode;
+import jdk.internal.org.objectweb.asm.tree.JumpInsnNode;
+import jdk.internal.org.objectweb.asm.tree.LabelNode;
+import jdk.internal.org.objectweb.asm.tree.LocalVariableNode;
+import jdk.internal.org.objectweb.asm.tree.LookupSwitchInsnNode;
+import jdk.internal.org.objectweb.asm.tree.MethodNode;
+import jdk.internal.org.objectweb.asm.tree.TableSwitchInsnNode;
+import jdk.internal.org.objectweb.asm.tree.TryCatchBlockNode;
+
+/**
+ * A {@link jdk.internal.org.objectweb.asm.MethodVisitor} that removes JSR instructions and inlines the
+ * referenced subroutines.
+ *
+ * @author Niko Matsakis
+ */
+// DontCheck(AbbreviationAsWordInName): can't be renamed (for backward binary compatibility).
+public class JSRInlinerAdapter extends MethodNode implements Opcodes {
+
+    /**
+      * The instructions that belong to the main "subroutine". Bit i is set iff instruction at index i
+      * belongs to this main "subroutine".
+      */
+    private final BitSet mainSubroutineInsns = new BitSet();
+
+    /**
+      * The instructions that belong to each subroutine. For each label which is the target of a JSR
+      * instruction, bit i of the corresponding BitSet in this map is set iff instruction at index i
+      * belongs to this subroutine.
+      */
+    private final Map<LabelNode, BitSet> subroutinesInsns = new HashMap<>();
+
+    /**
+      * The instructions that belong to more that one subroutine. Bit i is set iff instruction at index
+      * i belongs to more than one subroutine.
+      */
+    final BitSet sharedSubroutineInsns = new BitSet();
+
+    /**
+      * Constructs a new {@link JSRInlinerAdapter}. <i>Subclasses must not use this constructor</i>.
+      * Instead, they must use the {@link #JSRInlinerAdapter(int, MethodVisitor, int, String, String,
+      * String, String[])} version.
+      *
+      * @param methodVisitor the method visitor to send the resulting inlined method code to, or <code>
+      *     null</code>.
+      * @param access the method's access flags.
+      * @param name the method's name.
+      * @param descriptor the method's descriptor.
+      * @param signature the method's signature. May be {@literal null}.
+      * @param exceptions the internal names of the method's exception classes (see {@link
+      *     jdk.internal.org.objectweb.asm.Type#getInternalName()}). May be {@literal null}.
+      * @throws IllegalStateException if a subclass calls this constructor.
+      */
+    public JSRInlinerAdapter(
+            final MethodVisitor methodVisitor,
+            final int access,
+            final String name,
+            final String descriptor,
+            final String signature,
+            final String[] exceptions) {
+        this(
+                /* latest api = */ Opcodes.ASM9,
+                methodVisitor,
+                access,
+                name,
+                descriptor,
+                signature,
+                exceptions);
+        if (getClass() != JSRInlinerAdapter.class) {
+            throw new IllegalStateException();
+        }
+    }
+
+    /**
+      * Constructs a new {@link JSRInlinerAdapter}.
+      *
+      * @param api the ASM API version implemented by this visitor. Must be one of the {@code
+      *     ASM}<i>x</i> values in {@link Opcodes}.
+      * @param methodVisitor the method visitor to send the resulting inlined method code to, or <code>
+      *     null</code>.
+      * @param access the method's access flags (see {@link Opcodes}). This parameter also indicates if
+      *     the method is synthetic and/or deprecated.
+      * @param name the method's name.
+      * @param descriptor the method's descriptor.
+      * @param signature the method's signature. May be {@literal null}.
+      * @param exceptions the internal names of the method's exception classes (see {@link
+      *     jdk.internal.org.objectweb.asm.Type#getInternalName()}). May be {@literal null}.
+      */
+    protected JSRInlinerAdapter(
+            final int api,
+            final MethodVisitor methodVisitor,
+            final int access,
+            final String name,
+            final String descriptor,
+            final String signature,
+            final String[] exceptions) {
+        super(api, access, name, descriptor, signature, exceptions);
+        this.mv = methodVisitor;
+    }
+
+    @Override
+    public void visitJumpInsn(final int opcode, final Label label) {
+        super.visitJumpInsn(opcode, label);
+        LabelNode labelNode = ((JumpInsnNode) instructions.getLast()).label;
+        if (opcode == JSR && !subroutinesInsns.containsKey(labelNode)) {
+            subroutinesInsns.put(labelNode, new BitSet());
+        }
+    }
+
+    @Override
+    public void visitEnd() {
+        if (!subroutinesInsns.isEmpty()) {
+            // If the code contains at least one JSR instruction, inline the subroutines.
+            findSubroutinesInsns();
+            emitCode();
+        }
+        if (mv != null) {
+            accept(mv);
+        }
+    }
+
+    /** Determines, for each instruction, to which subroutine(s) it belongs. */
+    private void findSubroutinesInsns() {
+        // Find the instructions that belong to main subroutine.
+        BitSet visitedInsns = new BitSet();
+        findSubroutineInsns(0, mainSubroutineInsns, visitedInsns);
+        // For each subroutine, find the instructions that belong to this subroutine.
+        for (Map.Entry<LabelNode, BitSet> entry : subroutinesInsns.entrySet()) {
+            LabelNode jsrLabelNode = entry.getKey();
+            BitSet subroutineInsns = entry.getValue();
+            findSubroutineInsns(instructions.indexOf(jsrLabelNode), subroutineInsns, visitedInsns);
+        }
+    }
+
+    /**
+      * Finds the instructions that belong to the subroutine starting at the given instruction index.
+      * For this the control flow graph is visited with a depth first search (this includes the normal
+      * control flow and the exception handlers).
+      *
+      * @param startInsnIndex the index of the first instruction of the subroutine.
+      * @param subroutineInsns where the indices of the instructions of the subroutine must be stored.
+      * @param visitedInsns the indices of the instructions that have been visited so far (including in
+      *     previous calls to this method). This bitset is updated by this method each time a new
+      *     instruction is visited. It is used to make sure each instruction is visited at most once.
+      */
+    private void findSubroutineInsns(
+            final int startInsnIndex, final BitSet subroutineInsns, final BitSet visitedInsns) {
+        // First find the instructions reachable via normal execution.
+        findReachableInsns(startInsnIndex, subroutineInsns, visitedInsns);
+
+        // Then find the instructions reachable via the applicable exception handlers.
+        while (true) {
+            boolean applicableHandlerFound = false;
+            for (TryCatchBlockNode tryCatchBlockNode : tryCatchBlocks) {
+                // If the handler has already been processed, skip it.
+                int handlerIndex = instructions.indexOf(tryCatchBlockNode.handler);
+                if (subroutineInsns.get(handlerIndex)) {
+                    continue;
+                }
+
+                // If an instruction in the exception handler range belongs to the subroutine, the handler
+                // can be reached from the routine, and its instructions must be added to the subroutine.
+                int startIndex = instructions.indexOf(tryCatchBlockNode.start);
+                int endIndex = instructions.indexOf(tryCatchBlockNode.end);
+                int firstSubroutineInsnAfterTryCatchStart = subroutineInsns.nextSetBit(startIndex);
+                if (firstSubroutineInsnAfterTryCatchStart >= startIndex
+                        && firstSubroutineInsnAfterTryCatchStart < endIndex) {
+                    findReachableInsns(handlerIndex, subroutineInsns, visitedInsns);
+                    applicableHandlerFound = true;
+                }
+            }
+            // If an applicable exception handler has been found, other handlers may become applicable, so
+            // we must examine them again.
+            if (!applicableHandlerFound) {
+                return;
+            }
+        }
+    }
+
+    /**
+      * Finds the instructions that are reachable from the given instruction, without following any JSR
+      * instruction nor any exception handler. For this the control flow graph is visited with a depth
+      * first search.
+      *
+      * @param insnIndex the index of an instruction of the subroutine.
+      * @param subroutineInsns where the indices of the instructions of the subroutine must be stored.
+      * @param visitedInsns the indices of the instructions that have been visited so far (including in
+      *     previous calls to this method). This bitset is updated by this method each time a new
+      *     instruction is visited. It is used to make sure each instruction is visited at most once.
+      */
+    private void findReachableInsns(
+            final int insnIndex, final BitSet subroutineInsns, final BitSet visitedInsns) {
+        int currentInsnIndex = insnIndex;
+        // We implicitly assume below that execution can always fall through to the next instruction
+        // after a JSR. But a subroutine may never return, in which case the code after the JSR is
+        // unreachable and can be anything. In particular, it can seem to fall off the end of the
+        // method, so we must handle this case here (we could instead detect whether execution can
+        // return or not from a JSR, but this is more complicated).
+        while (currentInsnIndex < instructions.size()) {
+            // Visit each instruction at most once.
+            if (subroutineInsns.get(currentInsnIndex)) {
+                return;
+            }
+            subroutineInsns.set(currentInsnIndex);
+
+            // Check if this instruction has already been visited by another subroutine.
+            if (visitedInsns.get(currentInsnIndex)) {
+                sharedSubroutineInsns.set(currentInsnIndex);
+            }
+            visitedInsns.set(currentInsnIndex);
+
+            AbstractInsnNode currentInsnNode = instructions.get(currentInsnIndex);
+            if (currentInsnNode.getType() == AbstractInsnNode.JUMP_INSN
+                    && currentInsnNode.getOpcode() != JSR) {
+                // Don't follow JSR instructions in the control flow graph.
+                JumpInsnNode jumpInsnNode = (JumpInsnNode) currentInsnNode;
+                findReachableInsns(instructions.indexOf(jumpInsnNode.label), subroutineInsns, visitedInsns);
+            } else if (currentInsnNode.getType() == AbstractInsnNode.TABLESWITCH_INSN) {
+                TableSwitchInsnNode tableSwitchInsnNode = (TableSwitchInsnNode) currentInsnNode;
+                findReachableInsns(
+                        instructions.indexOf(tableSwitchInsnNode.dflt), subroutineInsns, visitedInsns);
+                for (LabelNode labelNode : tableSwitchInsnNode.labels) {
+                    findReachableInsns(instructions.indexOf(labelNode), subroutineInsns, visitedInsns);
+                }
+            } else if (currentInsnNode.getType() == AbstractInsnNode.LOOKUPSWITCH_INSN) {
+                LookupSwitchInsnNode lookupSwitchInsnNode = (LookupSwitchInsnNode) currentInsnNode;
+                findReachableInsns(
+                        instructions.indexOf(lookupSwitchInsnNode.dflt), subroutineInsns, visitedInsns);
+                for (LabelNode labelNode : lookupSwitchInsnNode.labels) {
+                    findReachableInsns(instructions.indexOf(labelNode), subroutineInsns, visitedInsns);
+                }
+            }
+
+            // Check if this instruction falls through to the next instruction; if not, return.
+            switch (instructions.get(currentInsnIndex).getOpcode()) {
+                case GOTO:
+                case RET:
+                case TABLESWITCH:
+                case LOOKUPSWITCH:
+                case IRETURN:
+                case LRETURN:
+                case FRETURN:
+                case DRETURN:
+                case ARETURN:
+                case RETURN:
+                case ATHROW:
+                    // Note: this either returns from this subroutine, or from a parent subroutine.
+                    return;
+                default:
+                    // Go to the next instruction.
+                    currentInsnIndex++;
+                    break;
+            }
+        }
+    }
+
+    /**
+      * Creates the new instructions, inlining each instantiation of each subroutine until the code is
+      * fully elaborated.
+      */
+    private void emitCode() {
+        LinkedList<Instantiation> worklist = new LinkedList<>();
+        // Create an instantiation of the main "subroutine", which is just the main routine.
+        worklist.add(new Instantiation(null, mainSubroutineInsns));
+
+        // Emit instantiations of each subroutine we encounter, including the main subroutine.
+        InsnList newInstructions = new InsnList();
+        List<TryCatchBlockNode> newTryCatchBlocks = new ArrayList<>();
+        List<LocalVariableNode> newLocalVariables = new ArrayList<>();
+        while (!worklist.isEmpty()) {
+            Instantiation instantiation = worklist.removeFirst();
+            emitInstantiation(
+                    instantiation, worklist, newInstructions, newTryCatchBlocks, newLocalVariables);
+        }
+        instructions = newInstructions;
+        tryCatchBlocks = newTryCatchBlocks;
+        localVariables = newLocalVariables;
+    }
+
+    /**
+      * Emits an instantiation of a subroutine, specified by <code>instantiation</code>. May add new
+      * instantiations that are invoked by this one to the <code>worklist</code>, and new try/catch
+      * blocks to <code>newTryCatchBlocks</code>.
+      *
+      * @param instantiation the instantiation that must be performed.
+      * @param worklist list of the instantiations that remain to be done.
+      * @param newInstructions the instruction list to which the instantiated code must be appended.
+      * @param newTryCatchBlocks the exception handler list to which the instantiated handlers must be
+      *     appended.
+      * @param newLocalVariables the local variables list to which the instantiated local variables
+      *     must be appended.
+      */
+    private void emitInstantiation(
+            final Instantiation instantiation,
+            final List<Instantiation> worklist,
+            final InsnList newInstructions,
+            final List<TryCatchBlockNode> newTryCatchBlocks,
+            final List<LocalVariableNode> newLocalVariables) {
+        LabelNode previousLabelNode = null;
+        for (int i = 0; i < instructions.size(); ++i) {
+            AbstractInsnNode insnNode = instructions.get(i);
+            if (insnNode.getType() == AbstractInsnNode.LABEL) {
+                // Always clone all labels, while avoiding to add the same label more than once.
+                LabelNode labelNode = (LabelNode) insnNode;
+                LabelNode clonedLabelNode = instantiation.getClonedLabel(labelNode);
+                if (clonedLabelNode != previousLabelNode) {
+                    newInstructions.add(clonedLabelNode);
+                    previousLabelNode = clonedLabelNode;
+                }
+            } else if (instantiation.findOwner(i) == instantiation) {
+                // Don't emit instructions that were already emitted by an ancestor subroutine. Note that it
+                // is still possible for a given instruction to be emitted twice because it may belong to
+                // two subroutines that do not invoke each other.
+
+                if (insnNode.getOpcode() == RET) {
+                    // Translate RET instruction(s) to a jump to the return label for the appropriate
+                    // instantiation. The problem is that the subroutine may "fall through" to the ret of a
+                    // parent subroutine; therefore, to find the appropriate ret label we find the oldest
+                    // instantiation that claims to own this instruction.
+                    LabelNode retLabel = null;
+                    for (Instantiation retLabelOwner = instantiation;
+                            retLabelOwner != null;
+                            retLabelOwner = retLabelOwner.parent) {
+                        if (retLabelOwner.subroutineInsns.get(i)) {
+                            retLabel = retLabelOwner.returnLabel;
+                        }
+                    }
+                    if (retLabel == null) {
+                        // This is only possible if the mainSubroutine owns a RET instruction, which should
+                        // never happen for verifiable code.
+                        throw new IllegalArgumentException(
+                                "Instruction #" + i + " is a RET not owned by any subroutine");
+                    }
+                    newInstructions.add(new JumpInsnNode(GOTO, retLabel));
+                } else if (insnNode.getOpcode() == JSR) {
+                    LabelNode jsrLabelNode = ((JumpInsnNode) insnNode).label;
+                    BitSet subroutineInsns = subroutinesInsns.get(jsrLabelNode);
+                    Instantiation newInstantiation = new Instantiation(instantiation, subroutineInsns);
+                    LabelNode clonedJsrLabelNode = newInstantiation.getClonedLabelForJumpInsn(jsrLabelNode);
+                    // Replace the JSR instruction with a GOTO to the instantiated subroutine, and push NULL
+                    // for what was once the return address value. This hack allows us to avoid doing any sort
+                    // of data flow analysis to figure out which instructions manipulate the old return
+                    // address value pointer which is now known to be unneeded.
+                    newInstructions.add(new InsnNode(ACONST_NULL));
+                    newInstructions.add(new JumpInsnNode(GOTO, clonedJsrLabelNode));
+                    newInstructions.add(newInstantiation.returnLabel);
+                    // Insert this new instantiation into the queue to be emitted later.
+                    worklist.add(newInstantiation);
+                } else {
+                    newInstructions.add(insnNode.clone(instantiation));
+                }
+            }
+        }
+
+        // Emit the try/catch blocks that are relevant for this instantiation.
+        for (TryCatchBlockNode tryCatchBlockNode : tryCatchBlocks) {
+            final LabelNode start = instantiation.getClonedLabel(tryCatchBlockNode.start);
+            final LabelNode end = instantiation.getClonedLabel(tryCatchBlockNode.end);
+            if (start != end) {
+                final LabelNode handler =
+                        instantiation.getClonedLabelForJumpInsn(tryCatchBlockNode.handler);
+                if (start == null || end == null || handler == null) {
+                    throw new AssertionError("Internal error!");
+                }
+                newTryCatchBlocks.add(new TryCatchBlockNode(start, end, handler, tryCatchBlockNode.type));
+            }
+        }
+
+        // Emit the local variable nodes that are relevant for this instantiation.
+        for (LocalVariableNode localVariableNode : localVariables) {
+            final LabelNode start = instantiation.getClonedLabel(localVariableNode.start);
+            final LabelNode end = instantiation.getClonedLabel(localVariableNode.end);
+            if (start != end) {
+                newLocalVariables.add(
+                        new LocalVariableNode(
+                                localVariableNode.name,
+                                localVariableNode.desc,
+                                localVariableNode.signature,
+                                start,
+                                end,
+                                localVariableNode.index));
+            }
+        }
+    }
+
+    /** An instantiation of a subroutine. */
+    private final class Instantiation extends AbstractMap<LabelNode, LabelNode> {
+
+        /**
+          * The instantiation from which this one was created (or {@literal null} for the instantiation
+          * of the main "subroutine").
+          */
+        final Instantiation parent;
+
+        /**
+          * The original instructions that belong to the subroutine which is instantiated. Bit i is set
+          * iff instruction at index i belongs to this subroutine.
+          */
+        final BitSet subroutineInsns;
+
+        /**
+          * A map from labels from the original code to labels pointing at code specific to this
+          * instantiation, for use in remapping try/catch blocks, as well as jumps.
+          *
+          * <p>Note that in the presence of instructions belonging to several subroutines, we map the
+          * target label of a GOTO to the label used by the oldest instantiation (parent instantiations
+          * are older than their children). This avoids code duplication during inlining in most cases.
+          */
+        final Map<LabelNode, LabelNode> clonedLabels;
+
+        /** The return label for this instantiation, to which all original returns will be mapped. */
+        final LabelNode returnLabel;
+
+        Instantiation(final Instantiation parent, final BitSet subroutineInsns) {
+            for (Instantiation instantiation = parent;
+                    instantiation != null;
+                    instantiation = instantiation.parent) {
+                if (instantiation.subroutineInsns == subroutineInsns) {
+                    throw new IllegalArgumentException("Recursive invocation of " + subroutineInsns);
+                }
+            }
+
+            this.parent = parent;
+            this.subroutineInsns = subroutineInsns;
+            this.returnLabel = parent == null ? null : new LabelNode();
+            this.clonedLabels = new HashMap<>();
+
+            // Create a clone of each label in the original code of the subroutine. Note that we collapse
+            // labels which point at the same instruction into one.
+            LabelNode clonedLabelNode = null;
+            for (int insnIndex = 0; insnIndex < instructions.size(); insnIndex++) {
+                AbstractInsnNode insnNode = instructions.get(insnIndex);
+                if (insnNode.getType() == AbstractInsnNode.LABEL) {
+                    LabelNode labelNode = (LabelNode) insnNode;
+                    // If we already have a label pointing at this spot, don't recreate it.
+                    if (clonedLabelNode == null) {
+                        clonedLabelNode = new LabelNode();
+                    }
+                    clonedLabels.put(labelNode, clonedLabelNode);
+                } else if (findOwner(insnIndex) == this) {
+                    // We will emit this instruction, so clear the duplicateLabelNode flag since the next
+                    // Label will refer to a distinct instruction.
+                    clonedLabelNode = null;
+                }
+            }
+        }
+
+        /**
+          * Returns the "owner" of a particular instruction relative to this instantiation: the owner
+          * refers to the Instantiation which will emit the version of this instruction that we will
+          * execute.
+          *
+          * <p>Typically, the return value is either <code>this</code> or <code>null</code>. <code>this
+          * </code> indicates that this instantiation will generate the version of this instruction that
+          * we will execute, and <code>null</code> indicates that this instantiation never executes the
+          * given instruction.
+          *
+          * <p>Sometimes, however, an instruction can belong to multiple subroutines; this is called a
+          * shared instruction, and occurs when multiple subroutines branch to common points of control.
+          * In this case, the owner is the oldest instantiation which owns the instruction in question
+          * (parent instantiations are older than their children).
+          *
+          * @param insnIndex the index of an instruction in the original code.
+          * @return the "owner" of a particular instruction relative to this instantiation.
+          */
+        Instantiation findOwner(final int insnIndex) {
+            if (!subroutineInsns.get(insnIndex)) {
+                return null;
+            }
+            if (!sharedSubroutineInsns.get(insnIndex)) {
+                return this;
+            }
+            Instantiation owner = this;
+            for (Instantiation instantiation = parent;
+                    instantiation != null;
+                    instantiation = instantiation.parent) {
+                if (instantiation.subroutineInsns.get(insnIndex)) {
+                    owner = instantiation;
+                }
+            }
+            return owner;
+        }
+
+        /**
+          * Returns the clone of the given original label that is appropriate for use in a jump
+          * instruction.
+          *
+          * @param labelNode a label of the original code.
+          * @return a clone of the given label for use in a jump instruction in the inlined code.
+          */
+        LabelNode getClonedLabelForJumpInsn(final LabelNode labelNode) {
+            // findOwner should never return null, because owner is null only if an instruction cannot be
+            // reached from this subroutine.
+            return findOwner(instructions.indexOf(labelNode)).clonedLabels.get(labelNode);
+        }
+
+        /**
+          * Returns the clone of the given original label that is appropriate for use by a try/catch
+          * block or a variable annotation.
+          *
+          * @param labelNode a label of the original code.
+          * @return a clone of the given label for use by a try/catch block or a variable annotation in
+          *     the inlined code.
+          */
+        LabelNode getClonedLabel(final LabelNode labelNode) {
+            return clonedLabels.get(labelNode);
+        }
+
+        // AbstractMap implementation
+
+        @Override
+        public Set<Map.Entry<LabelNode, LabelNode>> entrySet() {
+            throw new UnsupportedOperationException();
+        }
+
+        @Override
+        public LabelNode get(final Object key) {
+            return getClonedLabelForJumpInsn((LabelNode) key);
+        }
+
+        @Override
+        public boolean equals(final Object other) {
+            throw new UnsupportedOperationException();
+        }
+
+        @Override
+        public int hashCode() {
+            throw new UnsupportedOperationException();
+        }
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/org/objectweb/asm/commons/LocalVariablesSorter.class b/tests/test_data/std/jdk/internal/org/objectweb/asm/commons/LocalVariablesSorter.class
new file mode 100644
index 0000000000000000000000000000000000000000..f452f7a2c1668c2488c46d73df2434a22017a559
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diff --git a/tests/test_data/std/jdk/internal/org/objectweb/asm/commons/LocalVariablesSorter.java b/tests/test_data/std/jdk/internal/org/objectweb/asm/commons/LocalVariablesSorter.java
new file mode 100644
index 00000000..c4063340
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/org/objectweb/asm/commons/LocalVariablesSorter.java
@@ -0,0 +1,383 @@
+/*
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/*
+ * This file is available under and governed by the GNU General Public
+ * License version 2 only, as published by the Free Software Foundation.
+ * However, the following notice accompanied the original version of this
+ * file:
+ *
+ * ASM: a very small and fast Java bytecode manipulation framework
+ * Copyright (c) 2000-2011 INRIA, France Telecom
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the copyright holders nor the names of its
+ *    contributors may be used to endorse or promote products derived from
+ *    this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+package jdk.internal.org.objectweb.asm.commons;
+
+import jdk.internal.org.objectweb.asm.AnnotationVisitor;
+import jdk.internal.org.objectweb.asm.Label;
+import jdk.internal.org.objectweb.asm.MethodVisitor;
+import jdk.internal.org.objectweb.asm.Opcodes;
+import jdk.internal.org.objectweb.asm.Type;
+import jdk.internal.org.objectweb.asm.TypePath;
+
+/**
+ * A {@link MethodVisitor} that renumbers local variables in their order of appearance. This adapter
+ * allows one to easily add new local variables to a method. It may be used by inheriting from this
+ * class, but the preferred way of using it is via delegation: the next visitor in the chain can
+ * indeed add new locals when needed by calling {@link #newLocal} on this adapter (this requires a
+ * reference back to this {@link LocalVariablesSorter}).
+ *
+ * @author Chris Nokleberg
+ * @author Eugene Kuleshov
+ * @author Eric Bruneton
+ */
+public class LocalVariablesSorter extends MethodVisitor {
+
+    /** The type of the java.lang.Object class. */
+    private static final Type OBJECT_TYPE = Type.getObjectType("java/lang/Object");
+
+    /**
+      * The mapping from old to new local variable indices. A local variable at index i of size 1 is
+      * remapped to 'mapping[2*i]', while a local variable at index i of size 2 is remapped to
+      * 'mapping[2*i+1]'.
+      */
+    private int[] remappedVariableIndices = new int[40];
+
+    /**
+      * The local variable types after remapping. The format of this array is the same as in {@link
+      * MethodVisitor#visitFrame}, except that long and double types use two slots.
+      */
+    private Object[] remappedLocalTypes = new Object[20];
+
+    /** The index of the first local variable, after formal parameters. */
+    protected final int firstLocal;
+
+    /** The index of the next local variable to be created by {@link #newLocal}. */
+    protected int nextLocal;
+
+    /**
+      * Constructs a new {@link LocalVariablesSorter}. <i>Subclasses must not use this constructor</i>.
+      * Instead, they must use the {@link #LocalVariablesSorter(int, int, String, MethodVisitor)}
+      * version.
+      *
+      * @param access access flags of the adapted method.
+      * @param descriptor the method's descriptor (see {@link Type}).
+      * @param methodVisitor the method visitor to which this adapter delegates calls.
+      * @throws IllegalStateException if a subclass calls this constructor.
+      */
+    public LocalVariablesSorter(
+            final int access, final String descriptor, final MethodVisitor methodVisitor) {
+        this(/* latest api = */ Opcodes.ASM9, access, descriptor, methodVisitor);
+        if (getClass() != LocalVariablesSorter.class) {
+            throw new IllegalStateException();
+        }
+    }
+
+    /**
+      * Constructs a new {@link LocalVariablesSorter}.
+      *
+      * @param api the ASM API version implemented by this visitor. Must be one of the {@code
+      *     ASM}<i>x</i> values in {@link Opcodes}.
+      * @param access access flags of the adapted method.
+      * @param descriptor the method's descriptor (see {@link Type}).
+      * @param methodVisitor the method visitor to which this adapter delegates calls.
+      */
+    protected LocalVariablesSorter(
+            final int api, final int access, final String descriptor, final MethodVisitor methodVisitor) {
+        super(api, methodVisitor);
+        nextLocal = (Opcodes.ACC_STATIC & access) == 0 ? 1 : 0;
+        for (Type argumentType : Type.getArgumentTypes(descriptor)) {
+            nextLocal += argumentType.getSize();
+        }
+        firstLocal = nextLocal;
+    }
+
+    @Override
+    public void visitVarInsn(final int opcode, final int varIndex) {
+        Type varType;
+        switch (opcode) {
+            case Opcodes.LLOAD:
+            case Opcodes.LSTORE:
+                varType = Type.LONG_TYPE;
+                break;
+            case Opcodes.DLOAD:
+            case Opcodes.DSTORE:
+                varType = Type.DOUBLE_TYPE;
+                break;
+            case Opcodes.FLOAD:
+            case Opcodes.FSTORE:
+                varType = Type.FLOAT_TYPE;
+                break;
+            case Opcodes.ILOAD:
+            case Opcodes.ISTORE:
+                varType = Type.INT_TYPE;
+                break;
+            case Opcodes.ALOAD:
+            case Opcodes.ASTORE:
+            case Opcodes.RET:
+                varType = OBJECT_TYPE;
+                break;
+            default:
+                throw new IllegalArgumentException("Invalid opcode " + opcode);
+        }
+        super.visitVarInsn(opcode, remap(varIndex, varType));
+    }
+
+    @Override
+    public void visitIincInsn(final int varIndex, final int increment) {
+        super.visitIincInsn(remap(varIndex, Type.INT_TYPE), increment);
+    }
+
+    @Override
+    public void visitMaxs(final int maxStack, final int maxLocals) {
+        super.visitMaxs(maxStack, nextLocal);
+    }
+
+    @Override
+    public void visitLocalVariable(
+            final String name,
+            final String descriptor,
+            final String signature,
+            final Label start,
+            final Label end,
+            final int index) {
+        int remappedIndex = remap(index, Type.getType(descriptor));
+        super.visitLocalVariable(name, descriptor, signature, start, end, remappedIndex);
+    }
+
+    @Override
+    public AnnotationVisitor visitLocalVariableAnnotation(
+            final int typeRef,
+            final TypePath typePath,
+            final Label[] start,
+            final Label[] end,
+            final int[] index,
+            final String descriptor,
+            final boolean visible) {
+        Type type = Type.getType(descriptor);
+        int[] remappedIndex = new int[index.length];
+        for (int i = 0; i < remappedIndex.length; ++i) {
+            remappedIndex[i] = remap(index[i], type);
+        }
+        return super.visitLocalVariableAnnotation(
+                typeRef, typePath, start, end, remappedIndex, descriptor, visible);
+    }
+
+    @Override
+    public void visitFrame(
+            final int type,
+            final int numLocal,
+            final Object[] local,
+            final int numStack,
+            final Object[] stack) {
+        if (type != Opcodes.F_NEW) { // Uncompressed frame.
+            throw new IllegalArgumentException(
+                    "LocalVariablesSorter only accepts expanded frames (see ClassReader.EXPAND_FRAMES)");
+        }
+
+        // Create a copy of remappedLocals.
+        Object[] oldRemappedLocals = new Object[remappedLocalTypes.length];
+        System.arraycopy(remappedLocalTypes, 0, oldRemappedLocals, 0, oldRemappedLocals.length);
+
+        updateNewLocals(remappedLocalTypes);
+
+        // Copy the types from 'local' to 'remappedLocals'. 'remappedLocals' already contains the
+        // variables added with 'newLocal'.
+        int oldVar = 0; // Old local variable index.
+        for (int i = 0; i < numLocal; ++i) {
+            Object localType = local[i];
+            if (localType != Opcodes.TOP) {
+                Type varType = OBJECT_TYPE;
+                if (localType == Opcodes.INTEGER) {
+                    varType = Type.INT_TYPE;
+                } else if (localType == Opcodes.FLOAT) {
+                    varType = Type.FLOAT_TYPE;
+                } else if (localType == Opcodes.LONG) {
+                    varType = Type.LONG_TYPE;
+                } else if (localType == Opcodes.DOUBLE) {
+                    varType = Type.DOUBLE_TYPE;
+                } else if (localType instanceof String) {
+                    varType = Type.getObjectType((String) localType);
+                }
+                setFrameLocal(remap(oldVar, varType), localType);
+            }
+            oldVar += localType == Opcodes.LONG || localType == Opcodes.DOUBLE ? 2 : 1;
+        }
+
+        // Remove TOP after long and double types as well as trailing TOPs.
+        oldVar = 0;
+        int newVar = 0;
+        int remappedNumLocal = 0;
+        while (oldVar < remappedLocalTypes.length) {
+            Object localType = remappedLocalTypes[oldVar];
+            oldVar += localType == Opcodes.LONG || localType == Opcodes.DOUBLE ? 2 : 1;
+            if (localType != null && localType != Opcodes.TOP) {
+                remappedLocalTypes[newVar++] = localType;
+                remappedNumLocal = newVar;
+            } else {
+                remappedLocalTypes[newVar++] = Opcodes.TOP;
+            }
+        }
+
+        // Visit the remapped frame.
+        super.visitFrame(type, remappedNumLocal, remappedLocalTypes, numStack, stack);
+
+        // Restore the original value of 'remappedLocals'.
+        remappedLocalTypes = oldRemappedLocals;
+    }
+
+    // -----------------------------------------------------------------------------------------------
+
+    /**
+      * Constructs a new local variable of the given type.
+      *
+      * @param type the type of the local variable to be created.
+      * @return the identifier of the newly created local variable.
+      */
+    public int newLocal(final Type type) {
+        Object localType;
+        switch (type.getSort()) {
+            case Type.BOOLEAN:
+            case Type.CHAR:
+            case Type.BYTE:
+            case Type.SHORT:
+            case Type.INT:
+                localType = Opcodes.INTEGER;
+                break;
+            case Type.FLOAT:
+                localType = Opcodes.FLOAT;
+                break;
+            case Type.LONG:
+                localType = Opcodes.LONG;
+                break;
+            case Type.DOUBLE:
+                localType = Opcodes.DOUBLE;
+                break;
+            case Type.ARRAY:
+                localType = type.getDescriptor();
+                break;
+            case Type.OBJECT:
+                localType = type.getInternalName();
+                break;
+            default:
+                throw new AssertionError();
+        }
+        int local = newLocalMapping(type);
+        setLocalType(local, type);
+        setFrameLocal(local, localType);
+        return local;
+    }
+
+    /**
+      * Notifies subclasses that a new stack map frame is being visited. The array argument contains
+      * the stack map frame types corresponding to the local variables added with {@link #newLocal}.
+      * This method can update these types in place for the stack map frame being visited. The default
+      * implementation of this method does nothing, i.e. a local variable added with {@link #newLocal}
+      * will have the same type in all stack map frames. But this behavior is not always the desired
+      * one, for instance if a local variable is added in the middle of a try/catch block: the frame
+      * for the exception handler should have a TOP type for this new local.
+      *
+      * @param newLocals the stack map frame types corresponding to the local variables added with
+      *     {@link #newLocal} (and null for the others). The format of this array is the same as in
+      *     {@link MethodVisitor#visitFrame}, except that long and double types use two slots. The
+      *     types for the current stack map frame must be updated in place in this array.
+      */
+    protected void updateNewLocals(final Object[] newLocals) {
+        // The default implementation does nothing.
+    }
+
+    /**
+      * Notifies subclasses that a local variable has been added or remapped. The default
+      * implementation of this method does nothing.
+      *
+      * @param local a local variable identifier, as returned by {@link #newLocal}.
+      * @param type the type of the value being stored in the local variable.
+      */
+    protected void setLocalType(final int local, final Type type) {
+        // The default implementation does nothing.
+    }
+
+    private void setFrameLocal(final int local, final Object type) {
+        int numLocals = remappedLocalTypes.length;
+        if (local >= numLocals) {
+            Object[] newRemappedLocalTypes = new Object[Math.max(2 * numLocals, local + 1)];
+            System.arraycopy(remappedLocalTypes, 0, newRemappedLocalTypes, 0, numLocals);
+            remappedLocalTypes = newRemappedLocalTypes;
+        }
+        remappedLocalTypes[local] = type;
+    }
+
+    private int remap(final int varIndex, final Type type) {
+        if (varIndex + type.getSize() <= firstLocal) {
+            return varIndex;
+        }
+        int key = 2 * varIndex + type.getSize() - 1;
+        int size = remappedVariableIndices.length;
+        if (key >= size) {
+            int[] newRemappedVariableIndices = new int[Math.max(2 * size, key + 1)];
+            System.arraycopy(remappedVariableIndices, 0, newRemappedVariableIndices, 0, size);
+            remappedVariableIndices = newRemappedVariableIndices;
+        }
+        int value = remappedVariableIndices[key];
+        if (value == 0) {
+            value = newLocalMapping(type);
+            setLocalType(value, type);
+            remappedVariableIndices[key] = value + 1;
+        } else {
+            value--;
+        }
+        return value;
+    }
+
+    protected int newLocalMapping(final Type type) {
+        int local = nextLocal;
+        nextLocal += type.getSize();
+        return local;
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/org/objectweb/asm/commons/Method.class b/tests/test_data/std/jdk/internal/org/objectweb/asm/commons/Method.class
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diff --git a/tests/test_data/std/jdk/internal/org/objectweb/asm/commons/Method.java b/tests/test_data/std/jdk/internal/org/objectweb/asm/commons/Method.java
new file mode 100644
index 00000000..96b18853
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/org/objectweb/asm/commons/Method.java
@@ -0,0 +1,294 @@
+/*
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/*
+ * This file is available under and governed by the GNU General Public
+ * License version 2 only, as published by the Free Software Foundation.
+ * However, the following notice accompanied the original version of this
+ * file:
+ *
+ * ASM: a very small and fast Java bytecode manipulation framework
+ * Copyright (c) 2000-2011 INRIA, France Telecom
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the copyright holders nor the names of its
+ *    contributors may be used to endorse or promote products derived from
+ *    this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+package jdk.internal.org.objectweb.asm.commons;
+
+import java.util.HashMap;
+import java.util.Map;
+import jdk.internal.org.objectweb.asm.Type;
+
+/**
+ * A named method descriptor.
+ *
+ * @author Juozas Baliuka
+ * @author Chris Nokleberg
+ * @author Eric Bruneton
+ */
+public class Method {
+
+    /** The method name. */
+    private final String name;
+
+    /** The method descriptor. */
+    private final String descriptor;
+
+    /** The descriptors of the primitive Java types (plus void). */
+    private static final Map<String, String> PRIMITIVE_TYPE_DESCRIPTORS;
+
+    static {
+        HashMap<String, String> descriptors = new HashMap<>();
+        descriptors.put("void", "V");
+        descriptors.put("byte", "B");
+        descriptors.put("char", "C");
+        descriptors.put("double", "D");
+        descriptors.put("float", "F");
+        descriptors.put("int", "I");
+        descriptors.put("long", "J");
+        descriptors.put("short", "S");
+        descriptors.put("boolean", "Z");
+        PRIMITIVE_TYPE_DESCRIPTORS = descriptors;
+    }
+
+    /**
+      * Constructs a new {@link Method}.
+      *
+      * @param name the method's name.
+      * @param descriptor the method's descriptor.
+      */
+    public Method(final String name, final String descriptor) {
+        this.name = name;
+        this.descriptor = descriptor;
+    }
+
+    /**
+      * Constructs a new {@link Method}.
+      *
+      * @param name the method's name.
+      * @param returnType the method's return type.
+      * @param argumentTypes the method's argument types.
+      */
+    public Method(final String name, final Type returnType, final Type[] argumentTypes) {
+        this(name, Type.getMethodDescriptor(returnType, argumentTypes));
+    }
+
+    /**
+      * Creates a new {@link Method}.
+      *
+      * @param method a java.lang.reflect method descriptor
+      * @return a {@link Method} corresponding to the given Java method declaration.
+      */
+    public static Method getMethod(final java.lang.reflect.Method method) {
+        return new Method(method.getName(), Type.getMethodDescriptor(method));
+    }
+
+    /**
+      * Creates a new {@link Method}.
+      *
+      * @param constructor a java.lang.reflect constructor descriptor
+      * @return a {@link Method} corresponding to the given Java constructor declaration.
+      */
+    public static Method getMethod(final java.lang.reflect.Constructor<?> constructor) {
+        return new Method("<init>", Type.getConstructorDescriptor(constructor));
+    }
+
+    /**
+      * Returns a {@link Method} corresponding to the given Java method declaration.
+      *
+      * @param method a Java method declaration, without argument names, of the form "returnType name
+      *     (argumentType1, ... argumentTypeN)", where the types are in plain Java (e.g. "int",
+      *     "float", "java.util.List", ...). Classes of the java.lang package can be specified by their
+      *     unqualified name; all other classes names must be fully qualified.
+      * @return a {@link Method} corresponding to the given Java method declaration.
+      * @throws IllegalArgumentException if <code>method</code> could not get parsed.
+      */
+    public static Method getMethod(final String method) {
+        return getMethod(method, false);
+    }
+
+    /**
+      * Returns a {@link Method} corresponding to the given Java method declaration.
+      *
+      * @param method a Java method declaration, without argument names, of the form "returnType name
+      *     (argumentType1, ... argumentTypeN)", where the types are in plain Java (e.g. "int",
+      *     "float", "java.util.List", ...). Classes of the java.lang package may be specified by their
+      *     unqualified name, depending on the defaultPackage argument; all other classes names must be
+      *     fully qualified.
+      * @param defaultPackage true if unqualified class names belong to the default package, or false
+      *     if they correspond to java.lang classes. For instance "Object" means "Object" if this
+      *     option is true, or "java.lang.Object" otherwise.
+      * @return a {@link Method} corresponding to the given Java method declaration.
+      * @throws IllegalArgumentException if <code>method</code> could not get parsed.
+      */
+    public static Method getMethod(final String method, final boolean defaultPackage) {
+        final int spaceIndex = method.indexOf(' ');
+        int currentArgumentStartIndex = method.indexOf('(', spaceIndex) + 1;
+        final int endIndex = method.indexOf(')', currentArgumentStartIndex);
+        if (spaceIndex == -1 || currentArgumentStartIndex == 0 || endIndex == -1) {
+            throw new IllegalArgumentException();
+        }
+        final String returnType = method.substring(0, spaceIndex);
+        final String methodName =
+                method.substring(spaceIndex + 1, currentArgumentStartIndex - 1).trim();
+        StringBuilder stringBuilder = new StringBuilder();
+        stringBuilder.append('(');
+        int currentArgumentEndIndex;
+        do {
+            String argumentDescriptor;
+            currentArgumentEndIndex = method.indexOf(',', currentArgumentStartIndex);
+            if (currentArgumentEndIndex == -1) {
+                argumentDescriptor =
+                        getDescriptorInternal(
+                                method.substring(currentArgumentStartIndex, endIndex).trim(), defaultPackage);
+            } else {
+                argumentDescriptor =
+                        getDescriptorInternal(
+                                method.substring(currentArgumentStartIndex, currentArgumentEndIndex).trim(),
+                                defaultPackage);
+                currentArgumentStartIndex = currentArgumentEndIndex + 1;
+            }
+            stringBuilder.append(argumentDescriptor);
+        } while (currentArgumentEndIndex != -1);
+        stringBuilder.append(')').append(getDescriptorInternal(returnType, defaultPackage));
+        return new Method(methodName, stringBuilder.toString());
+    }
+
+    /**
+      * Returns the descriptor corresponding to the given type name.
+      *
+      * @param type a Java type name.
+      * @param defaultPackage true if unqualified class names belong to the default package, or false
+      *     if they correspond to java.lang classes. For instance "Object" means "Object" if this
+      *     option is true, or "java.lang.Object" otherwise.
+      * @return the descriptor corresponding to the given type name.
+      */
+    private static String getDescriptorInternal(final String type, final boolean defaultPackage) {
+        if ("".equals(type)) {
+            return type;
+        }
+
+        StringBuilder stringBuilder = new StringBuilder();
+        int arrayBracketsIndex = 0;
+        while ((arrayBracketsIndex = type.indexOf("[]", arrayBracketsIndex) + 1) > 0) {
+            stringBuilder.append('[');
+        }
+
+        String elementType = type.substring(0, type.length() - stringBuilder.length() * 2);
+        String descriptor = PRIMITIVE_TYPE_DESCRIPTORS.get(elementType);
+        if (descriptor != null) {
+            stringBuilder.append(descriptor);
+        } else {
+            stringBuilder.append('L');
+            if (elementType.indexOf('.') < 0) {
+                if (!defaultPackage) {
+                    stringBuilder.append("java/lang/");
+                }
+                stringBuilder.append(elementType);
+            } else {
+                stringBuilder.append(elementType.replace('.', '/'));
+            }
+            stringBuilder.append(';');
+        }
+        return stringBuilder.toString();
+    }
+
+    /**
+      * Returns the name of the method described by this object.
+      *
+      * @return the name of the method described by this object.
+      */
+    public String getName() {
+        return name;
+    }
+
+    /**
+      * Returns the descriptor of the method described by this object.
+      *
+      * @return the descriptor of the method described by this object.
+      */
+    public String getDescriptor() {
+        return descriptor;
+    }
+
+    /**
+      * Returns the return type of the method described by this object.
+      *
+      * @return the return type of the method described by this object.
+      */
+    public Type getReturnType() {
+        return Type.getReturnType(descriptor);
+    }
+
+    /**
+      * Returns the argument types of the method described by this object.
+      *
+      * @return the argument types of the method described by this object.
+      */
+    public Type[] getArgumentTypes() {
+        return Type.getArgumentTypes(descriptor);
+    }
+
+    @Override
+    public String toString() {
+        return name + descriptor;
+    }
+
+    @Override
+    public boolean equals(final Object other) {
+        if (!(other instanceof Method)) {
+            return false;
+        }
+        Method otherMethod = (Method) other;
+        return name.equals(otherMethod.name) && descriptor.equals(otherMethod.descriptor);
+    }
+
+    @Override
+    public int hashCode() {
+        return name.hashCode() ^ descriptor.hashCode();
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/org/objectweb/asm/commons/MethodRemapper.class b/tests/test_data/std/jdk/internal/org/objectweb/asm/commons/MethodRemapper.class
new file mode 100644
index 0000000000000000000000000000000000000000..0f70841c02a3a51ee518dba58c2cc9e10e5dd3e2
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diff --git a/tests/test_data/std/jdk/internal/org/objectweb/asm/commons/MethodRemapper.java b/tests/test_data/std/jdk/internal/org/objectweb/asm/commons/MethodRemapper.java
new file mode 100644
index 00000000..c2335077
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/org/objectweb/asm/commons/MethodRemapper.java
@@ -0,0 +1,321 @@
+/*
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/*
+ * This file is available under and governed by the GNU General Public
+ * License version 2 only, as published by the Free Software Foundation.
+ * However, the following notice accompanied the original version of this
+ * file:
+ *
+ * ASM: a very small and fast Java bytecode manipulation framework
+ * Copyright (c) 2000-2011 INRIA, France Telecom
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the copyright holders nor the names of its
+ *    contributors may be used to endorse or promote products derived from
+ *    this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+package jdk.internal.org.objectweb.asm.commons;
+
+import jdk.internal.org.objectweb.asm.AnnotationVisitor;
+import jdk.internal.org.objectweb.asm.Handle;
+import jdk.internal.org.objectweb.asm.Label;
+import jdk.internal.org.objectweb.asm.MethodVisitor;
+import jdk.internal.org.objectweb.asm.Opcodes;
+import jdk.internal.org.objectweb.asm.TypePath;
+
+/**
+ * A {@link MethodVisitor} that remaps types with a {@link Remapper}.
+ *
+ * @author Eugene Kuleshov
+ */
+public class MethodRemapper extends MethodVisitor {
+
+    /** The remapper used to remap the types in the visited field. */
+    protected final Remapper remapper;
+
+    /**
+      * Constructs a new {@link MethodRemapper}. <i>Subclasses must not use this constructor</i>.
+      * Instead, they must use the {@link #MethodRemapper(int,MethodVisitor,Remapper)} version.
+      *
+      * @param methodVisitor the method visitor this remapper must delegate to.
+      * @param remapper the remapper to use to remap the types in the visited method.
+      */
+    public MethodRemapper(final MethodVisitor methodVisitor, final Remapper remapper) {
+        this(/* latest api = */ Opcodes.ASM9, methodVisitor, remapper);
+    }
+
+    /**
+      * Constructs a new {@link MethodRemapper}.
+      *
+      * @param api the ASM API version supported by this remapper. Must be one of the {@code
+      *     ASM}<i>x</i> values in {@link Opcodes}.
+      * @param methodVisitor the method visitor this remapper must delegate to.
+      * @param remapper the remapper to use to remap the types in the visited method.
+      */
+    protected MethodRemapper(
+            final int api, final MethodVisitor methodVisitor, final Remapper remapper) {
+        super(api, methodVisitor);
+        this.remapper = remapper;
+    }
+
+    @Override
+    public AnnotationVisitor visitAnnotationDefault() {
+        AnnotationVisitor annotationVisitor = super.visitAnnotationDefault();
+        return annotationVisitor == null
+                ? annotationVisitor
+                : createAnnotationRemapper(/* descriptor = */ null, annotationVisitor);
+    }
+
+    @Override
+    public AnnotationVisitor visitAnnotation(final String descriptor, final boolean visible) {
+        AnnotationVisitor annotationVisitor =
+                super.visitAnnotation(remapper.mapDesc(descriptor), visible);
+        return annotationVisitor == null
+                ? annotationVisitor
+                : createAnnotationRemapper(descriptor, annotationVisitor);
+    }
+
+    @Override
+    public AnnotationVisitor visitTypeAnnotation(
+            final int typeRef, final TypePath typePath, final String descriptor, final boolean visible) {
+        AnnotationVisitor annotationVisitor =
+                super.visitTypeAnnotation(typeRef, typePath, remapper.mapDesc(descriptor), visible);
+        return annotationVisitor == null
+                ? annotationVisitor
+                : createAnnotationRemapper(descriptor, annotationVisitor);
+    }
+
+    @Override
+    public AnnotationVisitor visitParameterAnnotation(
+            final int parameter, final String descriptor, final boolean visible) {
+        AnnotationVisitor annotationVisitor =
+                super.visitParameterAnnotation(parameter, remapper.mapDesc(descriptor), visible);
+        return annotationVisitor == null
+                ? annotationVisitor
+                : createAnnotationRemapper(descriptor, annotationVisitor);
+    }
+
+    @Override
+    public void visitFrame(
+            final int type,
+            final int numLocal,
+            final Object[] local,
+            final int numStack,
+            final Object[] stack) {
+        super.visitFrame(
+                type,
+                numLocal,
+                remapFrameTypes(numLocal, local),
+                numStack,
+                remapFrameTypes(numStack, stack));
+    }
+
+    private Object[] remapFrameTypes(final int numTypes, final Object[] frameTypes) {
+        if (frameTypes == null) {
+            return frameTypes;
+        }
+        Object[] remappedFrameTypes = null;
+        for (int i = 0; i < numTypes; ++i) {
+            if (frameTypes[i] instanceof String) {
+                if (remappedFrameTypes == null) {
+                    remappedFrameTypes = new Object[numTypes];
+                    System.arraycopy(frameTypes, 0, remappedFrameTypes, 0, numTypes);
+                }
+                remappedFrameTypes[i] = remapper.mapType((String) frameTypes[i]);
+            }
+        }
+        return remappedFrameTypes == null ? frameTypes : remappedFrameTypes;
+    }
+
+    @Override
+    public void visitFieldInsn(
+            final int opcode, final String owner, final String name, final String descriptor) {
+        super.visitFieldInsn(
+                opcode,
+                remapper.mapType(owner),
+                remapper.mapFieldName(owner, name, descriptor),
+                remapper.mapDesc(descriptor));
+    }
+
+    @Override
+    public void visitMethodInsn(
+            final int opcodeAndSource,
+            final String owner,
+            final String name,
+            final String descriptor,
+            final boolean isInterface) {
+        if (api < Opcodes.ASM5 && (opcodeAndSource & Opcodes.SOURCE_DEPRECATED) == 0) {
+            // Redirect the call to the deprecated version of this method.
+            super.visitMethodInsn(opcodeAndSource, owner, name, descriptor, isInterface);
+            return;
+        }
+        super.visitMethodInsn(
+                opcodeAndSource,
+                remapper.mapType(owner),
+                remapper.mapMethodName(owner, name, descriptor),
+                remapper.mapMethodDesc(descriptor),
+                isInterface);
+    }
+
+    @Override
+    public void visitInvokeDynamicInsn(
+            final String name,
+            final String descriptor,
+            final Handle bootstrapMethodHandle,
+            final Object... bootstrapMethodArguments) {
+        Object[] remappedBootstrapMethodArguments = new Object[bootstrapMethodArguments.length];
+        for (int i = 0; i < bootstrapMethodArguments.length; ++i) {
+            remappedBootstrapMethodArguments[i] = remapper.mapValue(bootstrapMethodArguments[i]);
+        }
+        super.visitInvokeDynamicInsn(
+                remapper.mapInvokeDynamicMethodName(name, descriptor),
+                remapper.mapMethodDesc(descriptor),
+                (Handle) remapper.mapValue(bootstrapMethodHandle),
+                remappedBootstrapMethodArguments);
+    }
+
+    @Override
+    public void visitTypeInsn(final int opcode, final String type) {
+        super.visitTypeInsn(opcode, remapper.mapType(type));
+    }
+
+    @Override
+    public void visitLdcInsn(final Object value) {
+        super.visitLdcInsn(remapper.mapValue(value));
+    }
+
+    @Override
+    public void visitMultiANewArrayInsn(final String descriptor, final int numDimensions) {
+        super.visitMultiANewArrayInsn(remapper.mapDesc(descriptor), numDimensions);
+    }
+
+    @Override
+    public AnnotationVisitor visitInsnAnnotation(
+            final int typeRef, final TypePath typePath, final String descriptor, final boolean visible) {
+        AnnotationVisitor annotationVisitor =
+                super.visitInsnAnnotation(typeRef, typePath, remapper.mapDesc(descriptor), visible);
+        return annotationVisitor == null
+                ? annotationVisitor
+                : createAnnotationRemapper(descriptor, annotationVisitor);
+    }
+
+    @Override
+    public void visitTryCatchBlock(
+            final Label start, final Label end, final Label handler, final String type) {
+        super.visitTryCatchBlock(start, end, handler, type == null ? null : remapper.mapType(type));
+    }
+
+    @Override
+    public AnnotationVisitor visitTryCatchAnnotation(
+            final int typeRef, final TypePath typePath, final String descriptor, final boolean visible) {
+        AnnotationVisitor annotationVisitor =
+                super.visitTryCatchAnnotation(typeRef, typePath, remapper.mapDesc(descriptor), visible);
+        return annotationVisitor == null
+                ? annotationVisitor
+                : createAnnotationRemapper(descriptor, annotationVisitor);
+    }
+
+    @Override
+    public void visitLocalVariable(
+            final String name,
+            final String descriptor,
+            final String signature,
+            final Label start,
+            final Label end,
+            final int index) {
+        super.visitLocalVariable(
+                name,
+                remapper.mapDesc(descriptor),
+                remapper.mapSignature(signature, true),
+                start,
+                end,
+                index);
+    }
+
+    @Override
+    public AnnotationVisitor visitLocalVariableAnnotation(
+            final int typeRef,
+            final TypePath typePath,
+            final Label[] start,
+            final Label[] end,
+            final int[] index,
+            final String descriptor,
+            final boolean visible) {
+        AnnotationVisitor annotationVisitor =
+                super.visitLocalVariableAnnotation(
+                        typeRef, typePath, start, end, index, remapper.mapDesc(descriptor), visible);
+        return annotationVisitor == null
+                ? annotationVisitor
+                : createAnnotationRemapper(descriptor, annotationVisitor);
+    }
+
+    /**
+      * Constructs a new remapper for annotations. The default implementation of this method returns a
+      * new {@link AnnotationRemapper}.
+      *
+      * @param annotationVisitor the AnnotationVisitor the remapper must delegate to.
+      * @return the newly created remapper.
+      * @deprecated use {@link #createAnnotationRemapper(String, AnnotationVisitor)} instead.
+      */
+    @Deprecated
+    protected AnnotationVisitor createAnnotationRemapper(final AnnotationVisitor annotationVisitor) {
+        return new AnnotationRemapper(api, /* descriptor = */ null, annotationVisitor, remapper);
+    }
+
+    /**
+      * Constructs a new remapper for annotations. The default implementation of this method returns a
+      * new {@link AnnotationRemapper}.
+      *
+      * @param descriptor the descriptor of the visited annotation.
+      * @param annotationVisitor the AnnotationVisitor the remapper must delegate to.
+      * @return the newly created remapper.
+      */
+    protected AnnotationVisitor createAnnotationRemapper(
+            final String descriptor, final AnnotationVisitor annotationVisitor) {
+        return new AnnotationRemapper(api, descriptor, annotationVisitor, remapper)
+                .orDeprecatedValue(createAnnotationRemapper(annotationVisitor));
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/org/objectweb/asm/commons/ModuleHashesAttribute.class b/tests/test_data/std/jdk/internal/org/objectweb/asm/commons/ModuleHashesAttribute.class
new file mode 100644
index 0000000000000000000000000000000000000000..ab8a3600353c86d742917180d1d1bb16f72d5463
GIT binary patch
literal 3453
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z<LLOCXca{rbjBZaM#?A-<8RLRkN7v}sQBHxX(*+VGSl7M$GPWz-#Ono+u#5F`6hra
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z{*elQ9m^#7<pNL4Lu9Utx$~Aj9V@U>!zu$0V6{N32GOpZSt`9?nHkF#2-qAPI=Jg8
zfo0LuKv&D%)TH}|3_OfS1e%n2p_CmiSef3DqU{LyqN$dYhP48VRTdQ6?Y3>6mXvj@
z!8%EAy=$q^wit*>sJe9L23*>0Ft8Du1iWS@GbgM2l?ak8M<trg2DV5v3Vi2j$I|ea
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zA2oOjaWvh-!Zq%p<zHBNi`b0+H|Cu_yvjT%Z3>ICI<8ILz}6$z@pzj*;%|-ph~PAy
zoW{0(4jX<$DB}0Z*;SZw;U{btNN5qi)ZVs!Zz2#5gtaT!AveQ;pYWUqzhZA&kn_dW
zc~6^8-w}G=&r=corh0qT;D!E)0QGbu;+G<F%e8|E1U_P5FJT!z#%g?mC_cqw_>AJY
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K=^XugaQ;77FH+h7

literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/org/objectweb/asm/commons/ModuleHashesAttribute.java b/tests/test_data/std/jdk/internal/org/objectweb/asm/commons/ModuleHashesAttribute.java
new file mode 100644
index 00000000..7bf0934a
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/org/objectweb/asm/commons/ModuleHashesAttribute.java
@@ -0,0 +1,170 @@
+/*
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/*
+ * This file is available under and governed by the GNU General Public
+ * License version 2 only, as published by the Free Software Foundation.
+ * However, the following notice accompanied the original version of this
+ * file:
+ *
+ * ASM: a very small and fast Java bytecode manipulation framework
+ * Copyright (c) 2000-2011 INRIA, France Telecom
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the copyright holders nor the names of its
+ *    contributors may be used to endorse or promote products derived from
+ *    this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+package jdk.internal.org.objectweb.asm.commons;
+
+import java.util.ArrayList;
+import java.util.List;
+import jdk.internal.org.objectweb.asm.Attribute;
+import jdk.internal.org.objectweb.asm.ByteVector;
+import jdk.internal.org.objectweb.asm.ClassReader;
+import jdk.internal.org.objectweb.asm.ClassWriter;
+import jdk.internal.org.objectweb.asm.Label;
+
+/**
+ * A ModuleHashes attribute. This attribute is specific to the OpenJDK and may change in the future.
+ *
+ * @author Remi Forax
+ */
+public final class ModuleHashesAttribute extends Attribute {
+
+    /** The name of the hashing algorithm. */
+    public String algorithm;
+
+    /** A list of module names. */
+    public List<String> modules;
+
+    /** The hash of the modules in {@link #modules}. The two lists must have the same size. */
+    public List<byte[]> hashes;
+
+    /**
+      * Constructs a new {@link ModuleHashesAttribute}.
+      *
+      * @param algorithm the name of the hashing algorithm.
+      * @param modules a list of module names.
+      * @param hashes the hash of the modules in 'modules'. The two lists must have the same size.
+      */
+    public ModuleHashesAttribute(
+            final String algorithm, final List<String> modules, final List<byte[]> hashes) {
+        super("ModuleHashes");
+        this.algorithm = algorithm;
+        this.modules = modules;
+        this.hashes = hashes;
+    }
+
+    /**
+      * Constructs an empty {@link ModuleHashesAttribute}. This object can be passed as a prototype to
+      * the {@link ClassReader#accept(org.objectweb.asm.ClassVisitor, Attribute[], int)} method.
+      */
+    public ModuleHashesAttribute() {
+        this(null, null, null);
+    }
+
+    @Override
+    protected Attribute read(
+            final ClassReader classReader,
+            final int offset,
+            final int length,
+            final char[] charBuffer,
+            final int codeAttributeOffset,
+            final Label[] labels) {
+        int currentOffset = offset;
+
+        String hashAlgorithm = classReader.readUTF8(currentOffset, charBuffer);
+        currentOffset += 2;
+
+        int numModules = classReader.readUnsignedShort(currentOffset);
+        currentOffset += 2;
+
+        ArrayList<String> moduleList = new ArrayList<>(numModules);
+        ArrayList<byte[]> hashList = new ArrayList<>(numModules);
+
+        for (int i = 0; i < numModules; ++i) {
+            String module = classReader.readModule(currentOffset, charBuffer);
+            currentOffset += 2;
+            moduleList.add(module);
+
+            int hashLength = classReader.readUnsignedShort(currentOffset);
+            currentOffset += 2;
+            byte[] hash = new byte[hashLength];
+            for (int j = 0; j < hashLength; ++j) {
+                hash[j] = (byte) classReader.readByte(currentOffset);
+                currentOffset += 1;
+            }
+            hashList.add(hash);
+        }
+        return new ModuleHashesAttribute(hashAlgorithm, moduleList, hashList);
+    }
+
+    @Override
+    protected ByteVector write(
+            final ClassWriter classWriter,
+            final byte[] code,
+            final int codeLength,
+            final int maxStack,
+            final int maxLocals) {
+        ByteVector byteVector = new ByteVector();
+        byteVector.putShort(classWriter.newUTF8(algorithm));
+        if (modules == null) {
+            byteVector.putShort(0);
+        } else {
+            int numModules = modules.size();
+            byteVector.putShort(numModules);
+            for (int i = 0; i < numModules; ++i) {
+                String module = modules.get(i);
+                byte[] hash = hashes.get(i);
+                byteVector
+                        .putShort(classWriter.newModule(module))
+                        .putShort(hash.length)
+                        .putByteArray(hash, 0, hash.length);
+            }
+        }
+        return byteVector;
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/org/objectweb/asm/commons/ModuleRemapper.class b/tests/test_data/std/jdk/internal/org/objectweb/asm/commons/ModuleRemapper.class
new file mode 100644
index 0000000000000000000000000000000000000000..5ab10fb110091ae09b54a6b88e056007c7a15231
GIT binary patch
literal 2637
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Ap#T5?

literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/org/objectweb/asm/commons/ModuleRemapper.java b/tests/test_data/std/jdk/internal/org/objectweb/asm/commons/ModuleRemapper.java
new file mode 100644
index 00000000..d843a715
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/org/objectweb/asm/commons/ModuleRemapper.java
@@ -0,0 +1,152 @@
+/*
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/*
+ * This file is available under and governed by the GNU General Public
+ * License version 2 only, as published by the Free Software Foundation.
+ * However, the following notice accompanied the original version of this
+ * file:
+ *
+ * ASM: a very small and fast Java bytecode manipulation framework
+ * Copyright (c) 2000-2011 INRIA, France Telecom
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the copyright holders nor the names of its
+ *    contributors may be used to endorse or promote products derived from
+ *    this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+package jdk.internal.org.objectweb.asm.commons;
+
+import jdk.internal.org.objectweb.asm.ModuleVisitor;
+import jdk.internal.org.objectweb.asm.Opcodes;
+
+/**
+ * A {@link ModuleVisitor} that remaps types with a {@link Remapper}.
+ *
+ * @author Remi Forax
+ */
+public class ModuleRemapper extends ModuleVisitor {
+
+    /** The remapper used to remap the types in the visited module. */
+    protected final Remapper remapper;
+
+    /**
+      * Constructs a new {@link ModuleRemapper}. <i>Subclasses must not use this constructor</i>.
+      * Instead, they must use the {@link #ModuleRemapper(int,ModuleVisitor,Remapper)} version.
+      *
+      * @param moduleVisitor the module visitor this remapper must delegate to.
+      * @param remapper the remapper to use to remap the types in the visited module.
+      */
+    public ModuleRemapper(final ModuleVisitor moduleVisitor, final Remapper remapper) {
+        this(/* latest api = */ Opcodes.ASM9, moduleVisitor, remapper);
+    }
+
+    /**
+      * Constructs a new {@link ModuleRemapper}.
+      *
+      * @param api the ASM API version supported by this remapper. Must be one of the {@code
+      *     ASM}<i>x</i> values in {@link Opcodes}.
+      * @param moduleVisitor the module visitor this remapper must delegate to.
+      * @param remapper the remapper to use to remap the types in the visited module.
+      */
+    protected ModuleRemapper(
+            final int api, final ModuleVisitor moduleVisitor, final Remapper remapper) {
+        super(api, moduleVisitor);
+        this.remapper = remapper;
+    }
+
+    @Override
+    public void visitMainClass(final String mainClass) {
+        super.visitMainClass(remapper.mapType(mainClass));
+    }
+
+    @Override
+    public void visitPackage(final String packaze) {
+        super.visitPackage(remapper.mapPackageName(packaze));
+    }
+
+    @Override
+    public void visitRequire(final String module, final int access, final String version) {
+        super.visitRequire(remapper.mapModuleName(module), access, version);
+    }
+
+    @Override
+    public void visitExport(final String packaze, final int access, final String... modules) {
+        String[] remappedModules = null;
+        if (modules != null) {
+            remappedModules = new String[modules.length];
+            for (int i = 0; i < modules.length; ++i) {
+                remappedModules[i] = remapper.mapModuleName(modules[i]);
+            }
+        }
+        super.visitExport(remapper.mapPackageName(packaze), access, remappedModules);
+    }
+
+    @Override
+    public void visitOpen(final String packaze, final int access, final String... modules) {
+        String[] remappedModules = null;
+        if (modules != null) {
+            remappedModules = new String[modules.length];
+            for (int i = 0; i < modules.length; ++i) {
+                remappedModules[i] = remapper.mapModuleName(modules[i]);
+            }
+        }
+        super.visitOpen(remapper.mapPackageName(packaze), access, remappedModules);
+    }
+
+    @Override
+    public void visitUse(final String service) {
+        super.visitUse(remapper.mapType(service));
+    }
+
+    @Override
+    public void visitProvide(final String service, final String... providers) {
+        String[] remappedProviders = new String[providers.length];
+        for (int i = 0; i < providers.length; ++i) {
+            remappedProviders[i] = remapper.mapType(providers[i]);
+        }
+        super.visitProvide(remapper.mapType(service), remappedProviders);
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/org/objectweb/asm/commons/ModuleResolutionAttribute.class b/tests/test_data/std/jdk/internal/org/objectweb/asm/commons/ModuleResolutionAttribute.class
new file mode 100644
index 0000000000000000000000000000000000000000..de7b0ce338a31eeb6f70998db92f93d00825c5c1
GIT binary patch
literal 1892
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zwv9%;yWZ&58|`kS>D0Q_?e2PQqq1qX845bpFtpsTV>x3!Ll4gw&L@1gDop~YJ#E(X
zO1ri$ET}84f7qhC(P&brCyh?U6xPyz;2Cv&vs!5z^+&>jx=7N!0d>d;({_1%JnC`3
zZS@?|ESg^5aypi83prLw;hr5ZRMQHQ+9FgZNxUP&D{9G)H*(_j%Z9O|8#`$prq$z4
zIrZ754NGk1`^g@=nHC|*iRR1O-3>VPq3m#X816AB{XNUCj(2xO$7XhPp`k)IrgnlM
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z6<Yo03^_VR%|-buz3DtMtfp1{Xn5(xl$JO4`+UO|-FoSR%V<q3JbXbLNTQCP#WFs_
z0vN7{dBW!;Uror@NWPwsZ;)I}$SdSYOHxc1ooJ!aw?xuo!phKZzO={=F;lwm7jl0@
z5mxED05NSYWO$gz3*010o!H|R)<`1H2$!~{*hn$z9kO9`CzoapapDM1iF^+zo0kz*
zeqt44NziaRMhJ*!mJkYWplq*Re2ql{`kfRR2x4;N_;UpEcw#suRG^}L8QmA~6{R53
zE8tF?OaWixo2aA(d`r67==M8&PnZ(!q8t-=MSg;S`UXqehd6&%UY1LLBKI1fY%R-2
zOeQ7z1v&gm{|&z-7^zc6D(>Njh>?o>cn~pC@i1njqCzL}$SSH4qa5+ou^wevBYg%N
F{{kh4&w~H}

literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/org/objectweb/asm/commons/ModuleResolutionAttribute.java b/tests/test_data/std/jdk/internal/org/objectweb/asm/commons/ModuleResolutionAttribute.java
new file mode 100644
index 00000000..5ccee829
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/org/objectweb/asm/commons/ModuleResolutionAttribute.java
@@ -0,0 +1,144 @@
+/*
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/*
+ * This file is available under and governed by the GNU General Public
+ * License version 2 only, as published by the Free Software Foundation.
+ * However, the following notice accompanied the original version of this
+ * file:
+ *
+ * ASM: a very small and fast Java bytecode manipulation framework
+ * Copyright (c) 2000-2011 INRIA, France Telecom
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the copyright holders nor the names of its
+ *    contributors may be used to endorse or promote products derived from
+ *    this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+package jdk.internal.org.objectweb.asm.commons;
+
+import jdk.internal.org.objectweb.asm.Attribute;
+import jdk.internal.org.objectweb.asm.ByteVector;
+import jdk.internal.org.objectweb.asm.ClassReader;
+import jdk.internal.org.objectweb.asm.ClassWriter;
+import jdk.internal.org.objectweb.asm.Label;
+
+/**
+ * A ModuleResolution attribute. This attribute is specific to the OpenJDK and may change in the
+ * future.
+ *
+ * @author Remi Forax
+ */
+public final class ModuleResolutionAttribute extends Attribute {
+    /**
+      * The resolution state of a module meaning that the module is not available from the class-path
+      * by default.
+      */
+    public static final int RESOLUTION_DO_NOT_RESOLVE_BY_DEFAULT = 1;
+
+    /** The resolution state of a module meaning the module is marked as deprecated. */
+    public static final int RESOLUTION_WARN_DEPRECATED = 2;
+
+    /**
+      * The resolution state of a module meaning the module is marked as deprecated and will be removed
+      * in a future release.
+      */
+    public static final int RESOLUTION_WARN_DEPRECATED_FOR_REMOVAL = 4;
+
+    /**
+      * The resolution state of a module meaning the module is not yet standardized, so in incubating
+      * mode.
+      */
+    public static final int RESOLUTION_WARN_INCUBATING = 8;
+
+    /**
+      * The resolution state of the module. Must be one of {@link #RESOLUTION_WARN_DEPRECATED}, {@link
+      * #RESOLUTION_WARN_DEPRECATED_FOR_REMOVAL}, and {@link #RESOLUTION_WARN_INCUBATING}.
+      */
+    public int resolution;
+
+    /**
+      * Constructs a new {@link ModuleResolutionAttribute}.
+      *
+      * @param resolution the resolution state of the module. Must be one of {@link
+      *     #RESOLUTION_WARN_DEPRECATED}, {@link #RESOLUTION_WARN_DEPRECATED_FOR_REMOVAL}, and {@link
+      *     #RESOLUTION_WARN_INCUBATING}.
+      */
+    public ModuleResolutionAttribute(final int resolution) {
+        super("ModuleResolution");
+        this.resolution = resolution;
+    }
+
+    /**
+      * Constructs an empty {@link ModuleResolutionAttribute}. This object can be passed as a prototype
+      * to the {@link ClassReader#accept(org.objectweb.asm.ClassVisitor, Attribute[], int)} method.
+      */
+    public ModuleResolutionAttribute() {
+        this(0);
+    }
+
+    @Override
+    protected Attribute read(
+            final ClassReader classReader,
+            final int offset,
+            final int length,
+            final char[] charBuffer,
+            final int codeOffset,
+            final Label[] labels) {
+        return new ModuleResolutionAttribute(classReader.readUnsignedShort(offset));
+    }
+
+    @Override
+    protected ByteVector write(
+            final ClassWriter classWriter,
+            final byte[] code,
+            final int codeLength,
+            final int maxStack,
+            final int maxLocals) {
+        ByteVector byteVector = new ByteVector();
+        byteVector.putShort(resolution);
+        return byteVector;
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/org/objectweb/asm/commons/ModuleTargetAttribute.class b/tests/test_data/std/jdk/internal/org/objectweb/asm/commons/ModuleTargetAttribute.class
new file mode 100644
index 0000000000000000000000000000000000000000..6ccc7e032cef29ee6a06ec34917530bf8e2e0970
GIT binary patch
literal 1842
zcmb7ETTc@~6#k}{-F8{2qJSXY&`K}JdcROaX_e5VXd+NTh$PdpZ5Ot?WV;o8_rLh6
zi9#ZYuO>eDlf*OIwbVc;W|PU8Gc(`$&Uen9pTEC-2av;y2m%c1yuIEu^+oPfbyq<M
zVHuJN84-rW#`>maSg!6^+|+ERs@bItz3gu5C5<=g+KlTuMycuQ4APWg8SXSgf1<F#
z-*V05R#jV|bE}$37NbzmBSTej3cU<dU4YAWy>43#t&>|vu*jCl-HPqh8Tt-KQz%wg
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zF2h73Pk9_)&jZ34hEUF4r^3bxhNZu3)=Rpx$V(=9`U-ZLn?>#zV(&XcZp~;gOm_=$
zY-L4Mp*_O~>Z0Shc2q2rry}K7yS*szl5S?YiqP&eV$)OZ?2GYk5jr{1FJV_I4V|QC
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zpB>Rs<8L3HObtI86;@;^GS2!L7koh?b^dO_<>gI=D4AY!QT|G){r51WyD9%q=brN5
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/org/objectweb/asm/commons/ModuleTargetAttribute.java b/tests/test_data/std/jdk/internal/org/objectweb/asm/commons/ModuleTargetAttribute.java
new file mode 100644
index 00000000..8d61baad
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/org/objectweb/asm/commons/ModuleTargetAttribute.java
@@ -0,0 +1,118 @@
+/*
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/*
+ * This file is available under and governed by the GNU General Public
+ * License version 2 only, as published by the Free Software Foundation.
+ * However, the following notice accompanied the original version of this
+ * file:
+ *
+ * ASM: a very small and fast Java bytecode manipulation framework
+ * Copyright (c) 2000-2011 INRIA, France Telecom
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the copyright holders nor the names of its
+ *    contributors may be used to endorse or promote products derived from
+ *    this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+package jdk.internal.org.objectweb.asm.commons;
+
+import jdk.internal.org.objectweb.asm.Attribute;
+import jdk.internal.org.objectweb.asm.ByteVector;
+import jdk.internal.org.objectweb.asm.ClassReader;
+import jdk.internal.org.objectweb.asm.ClassWriter;
+import jdk.internal.org.objectweb.asm.Label;
+
+/**
+ * A ModuleTarget attribute. This attribute is specific to the OpenJDK and may change in the future.
+ *
+ * @author Remi Forax
+ */
+public final class ModuleTargetAttribute extends Attribute {
+
+    /** The name of the platform on which the module can run. */
+    public String platform;
+
+    /**
+      * Constructs a new {@link ModuleTargetAttribute}.
+      *
+      * @param platform the name of the platform on which the module can run.
+      */
+    public ModuleTargetAttribute(final String platform) {
+        super("ModuleTarget");
+        this.platform = platform;
+    }
+
+    /**
+      * Constructs an empty {@link ModuleTargetAttribute}. This object can be passed as a prototype to
+      * the {@link ClassReader#accept(org.objectweb.asm.ClassVisitor, Attribute[], int)} method.
+      */
+    public ModuleTargetAttribute() {
+        this(null);
+    }
+
+    @Override
+    protected Attribute read(
+            final ClassReader classReader,
+            final int offset,
+            final int length,
+            final char[] charBuffer,
+            final int codeOffset,
+            final Label[] labels) {
+        return new ModuleTargetAttribute(classReader.readUTF8(offset, charBuffer));
+    }
+
+    @Override
+    protected ByteVector write(
+            final ClassWriter classWriter,
+            final byte[] code,
+            final int codeLength,
+            final int maxStack,
+            final int maxLocals) {
+        ByteVector byteVector = new ByteVector();
+        byteVector.putShort(platform == null ? 0 : classWriter.newUTF8(platform));
+        return byteVector;
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/org/objectweb/asm/commons/RecordComponentRemapper.class b/tests/test_data/std/jdk/internal/org/objectweb/asm/commons/RecordComponentRemapper.class
new file mode 100644
index 0000000000000000000000000000000000000000..e75b9eba1e1a8c3c5169f9dc7e6c144231d8d64b
GIT binary patch
literal 2795
zcmb_eUvt|;9NhDtC~?$;IMmcm3~5bDVkdQ5D5Z4?ElE>C-NGat105bvWF=K%OGcK{
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zb(+OZ%XGc!s#|Zkj^+59R^4bcEKgwMmhIU7ia>2)qZ|U(2U4+{w(okSuwj9QHfd?G
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zJfBXsDD8lU`cu~W3>Vmzv#`>J?8(dFF7irV4(qt5<}9Zq%W2Ii$uS~LDar9b@(ks!
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zr+iA5xsEa4@T*jp>9Q1*KV-=-9pcg<t^{oDq`bg1en1*86l*()nI3DVH$@r6A0f|u
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/org/objectweb/asm/commons/RecordComponentRemapper.java b/tests/test_data/std/jdk/internal/org/objectweb/asm/commons/RecordComponentRemapper.java
new file mode 100644
index 00000000..017f24a7
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/org/objectweb/asm/commons/RecordComponentRemapper.java
@@ -0,0 +1,149 @@
+/*
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/*
+ * This file is available under and governed by the GNU General Public
+ * License version 2 only, as published by the Free Software Foundation.
+ * However, the following notice accompanied the original version of this
+ * file:
+ *
+ * ASM: a very small and fast Java bytecode manipulation framework
+ * Copyright (c) 2000-2011 INRIA, France Telecom
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the copyright holders nor the names of its
+ *    contributors may be used to endorse or promote products derived from
+ *    this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+package jdk.internal.org.objectweb.asm.commons;
+
+import jdk.internal.org.objectweb.asm.AnnotationVisitor;
+import jdk.internal.org.objectweb.asm.Opcodes;
+import jdk.internal.org.objectweb.asm.RecordComponentVisitor;
+import jdk.internal.org.objectweb.asm.TypePath;
+
+/**
+ * A {@link RecordComponentVisitor} that remaps types with a {@link Remapper}.
+ *
+ * @author Remi Forax
+ */
+public class RecordComponentRemapper extends RecordComponentVisitor {
+
+    /** The remapper used to remap the types in the visited field. */
+    protected final Remapper remapper;
+
+    /**
+      * Constructs a new {@link RecordComponentRemapper}. <i>Subclasses must not use this
+      * constructor</i>. Instead, they must use the {@link
+      * #RecordComponentRemapper(int,RecordComponentVisitor,Remapper)} version.
+      *
+      * @param recordComponentVisitor the record component visitor this remapper must delegate to.
+      * @param remapper the remapper to use to remap the types in the visited record component.
+      */
+    public RecordComponentRemapper(
+            final RecordComponentVisitor recordComponentVisitor, final Remapper remapper) {
+        this(/* latest api = */ Opcodes.ASM9, recordComponentVisitor, remapper);
+    }
+
+    /**
+      * Constructs a new {@link RecordComponentRemapper}.
+      *
+      * @param api the ASM API version supported by this remapper. Must be one of {@link
+      *     jdk.internal.org.objectweb.asm.Opcodes#ASM8} or {@link jdk.internal.org.objectweb.asm.Opcodes#ASM9}.
+      * @param recordComponentVisitor the record component visitor this remapper must delegate to.
+      * @param remapper the remapper to use to remap the types in the visited record component.
+      */
+    protected RecordComponentRemapper(
+            final int api, final RecordComponentVisitor recordComponentVisitor, final Remapper remapper) {
+        super(api, recordComponentVisitor);
+        this.remapper = remapper;
+    }
+
+    @Override
+    public AnnotationVisitor visitAnnotation(final String descriptor, final boolean visible) {
+        AnnotationVisitor annotationVisitor =
+                super.visitAnnotation(remapper.mapDesc(descriptor), visible);
+        return annotationVisitor == null
+                ? null
+                : createAnnotationRemapper(descriptor, annotationVisitor);
+    }
+
+    @Override
+    public AnnotationVisitor visitTypeAnnotation(
+            final int typeRef, final TypePath typePath, final String descriptor, final boolean visible) {
+        AnnotationVisitor annotationVisitor =
+                super.visitTypeAnnotation(typeRef, typePath, remapper.mapDesc(descriptor), visible);
+        return annotationVisitor == null
+                ? null
+                : createAnnotationRemapper(descriptor, annotationVisitor);
+    }
+
+    /**
+      * Constructs a new remapper for annotations. The default implementation of this method returns a
+      * new {@link AnnotationRemapper}.
+      *
+      * @param annotationVisitor the AnnotationVisitor the remapper must delegate to.
+      * @return the newly created remapper.
+      * @deprecated use {@link #createAnnotationRemapper(String, AnnotationVisitor)} instead.
+      */
+    @Deprecated
+    protected AnnotationVisitor createAnnotationRemapper(final AnnotationVisitor annotationVisitor) {
+        return new AnnotationRemapper(api, /* descriptor = */ null, annotationVisitor, remapper);
+    }
+
+    /**
+      * Constructs a new remapper for annotations. The default implementation of this method returns a
+      * new {@link AnnotationRemapper}.
+      *
+      * @param descriptor the descriptor sof the visited annotation.
+      * @param annotationVisitor the AnnotationVisitor the remapper must delegate to.
+      * @return the newly created remapper.
+      */
+    protected AnnotationVisitor createAnnotationRemapper(
+            final String descriptor, final AnnotationVisitor annotationVisitor) {
+        return new AnnotationRemapper(api, descriptor, annotationVisitor, remapper)
+                .orDeprecatedValue(createAnnotationRemapper(annotationVisitor));
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/org/objectweb/asm/commons/Remapper.class b/tests/test_data/std/jdk/internal/org/objectweb/asm/commons/Remapper.class
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diff --git a/tests/test_data/std/jdk/internal/org/objectweb/asm/commons/Remapper.java b/tests/test_data/std/jdk/internal/org/objectweb/asm/commons/Remapper.java
new file mode 100644
index 00000000..aba7f0f2
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/org/objectweb/asm/commons/Remapper.java
@@ -0,0 +1,416 @@
+/*
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/*
+ * This file is available under and governed by the GNU General Public
+ * License version 2 only, as published by the Free Software Foundation.
+ * However, the following notice accompanied the original version of this
+ * file:
+ *
+ * ASM: a very small and fast Java bytecode manipulation framework
+ * Copyright (c) 2000-2011 INRIA, France Telecom
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the copyright holders nor the names of its
+ *    contributors may be used to endorse or promote products derived from
+ *    this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+package jdk.internal.org.objectweb.asm.commons;
+
+import jdk.internal.org.objectweb.asm.ConstantDynamic;
+import jdk.internal.org.objectweb.asm.Handle;
+import jdk.internal.org.objectweb.asm.Opcodes;
+import jdk.internal.org.objectweb.asm.Type;
+import jdk.internal.org.objectweb.asm.signature.SignatureReader;
+import jdk.internal.org.objectweb.asm.signature.SignatureVisitor;
+import jdk.internal.org.objectweb.asm.signature.SignatureWriter;
+
+/**
+ * A class responsible for remapping types and names.
+ *
+ * @author Eugene Kuleshov
+ */
+public abstract class Remapper {
+
+    /**
+      * Returns the given descriptor, remapped with {@link #map(String)}.
+      *
+      * @param descriptor a type descriptor.
+      * @return the given descriptor, with its [array element type] internal name remapped with {@link
+      *     #map(String)} (if the descriptor corresponds to an array or object type, otherwise the
+      *     descriptor is returned as is). See {@link Type#getInternalName()}.
+      */
+    public String mapDesc(final String descriptor) {
+        return mapType(Type.getType(descriptor)).getDescriptor();
+    }
+
+    /**
+      * Returns the given {@link Type}, remapped with {@link #map(String)} or {@link
+      * #mapMethodDesc(String)}.
+      *
+      * @param type a type, which can be a method type.
+      * @return the given type, with its [array element type] internal name remapped with {@link
+      *     #map(String)} (if the type is an array or object type, otherwise the type is returned as
+      *     is) or, of the type is a method type, with its descriptor remapped with {@link
+      *     #mapMethodDesc(String)}. See {@link Type#getInternalName()}.
+      */
+    private Type mapType(final Type type) {
+        switch (type.getSort()) {
+            case Type.ARRAY:
+                StringBuilder remappedDescriptor = new StringBuilder();
+                for (int i = 0; i < type.getDimensions(); ++i) {
+                    remappedDescriptor.append('[');
+                }
+                remappedDescriptor.append(mapType(type.getElementType()).getDescriptor());
+                return Type.getType(remappedDescriptor.toString());
+            case Type.OBJECT:
+                String remappedInternalName = map(type.getInternalName());
+                return remappedInternalName != null ? Type.getObjectType(remappedInternalName) : type;
+            case Type.METHOD:
+                return Type.getMethodType(mapMethodDesc(type.getDescriptor()));
+            default:
+                return type;
+        }
+    }
+
+    /**
+      * Returns the given internal name, remapped with {@link #map(String)}.
+      *
+      * @param internalName the internal name (or array type descriptor) of some (array) class (see
+      *     {@link Type#getInternalName()}).
+      * @return the given internal name, remapped with {@link #map(String)} (see {@link
+      *     Type#getInternalName()}).
+      */
+    public String mapType(final String internalName) {
+        if (internalName == null) {
+            return null;
+        }
+        return mapType(Type.getObjectType(internalName)).getInternalName();
+    }
+
+    /**
+      * Returns the given internal names, remapped with {@link #map(String)}.
+      *
+      * @param internalNames the internal names (or array type descriptors) of some (array) classes
+      *     (see {@link Type#getInternalName()}).
+      * @return the given internal name, remapped with {@link #map(String)} (see {@link
+      *     Type#getInternalName()}).
+      */
+    public String[] mapTypes(final String[] internalNames) {
+        String[] remappedInternalNames = null;
+        for (int i = 0; i < internalNames.length; ++i) {
+            String internalName = internalNames[i];
+            String remappedInternalName = mapType(internalName);
+            if (remappedInternalName != null) {
+                if (remappedInternalNames == null) {
+                    remappedInternalNames = internalNames.clone();
+                }
+                remappedInternalNames[i] = remappedInternalName;
+            }
+        }
+        return remappedInternalNames != null ? remappedInternalNames : internalNames;
+    }
+
+    /**
+      * Returns the given method descriptor, with its argument and return type descriptors remapped
+      * with {@link #mapDesc(String)}.
+      *
+      * @param methodDescriptor a method descriptor.
+      * @return the given method descriptor, with its argument and return type descriptors remapped
+      *     with {@link #mapDesc(String)}.
+      */
+    public String mapMethodDesc(final String methodDescriptor) {
+        if ("()V".equals(methodDescriptor)) {
+            return methodDescriptor;
+        }
+
+        StringBuilder stringBuilder = new StringBuilder("(");
+        for (Type argumentType : Type.getArgumentTypes(methodDescriptor)) {
+            stringBuilder.append(mapType(argumentType).getDescriptor());
+        }
+        Type returnType = Type.getReturnType(methodDescriptor);
+        if (returnType == Type.VOID_TYPE) {
+            stringBuilder.append(")V");
+        } else {
+            stringBuilder.append(')').append(mapType(returnType).getDescriptor());
+        }
+        return stringBuilder.toString();
+    }
+
+    /**
+      * Returns the given value, remapped with this remapper. Possible values are {@link Boolean},
+      * {@link Byte}, {@link Short}, {@link Character}, {@link Integer}, {@link Long}, {@link Double},
+      * {@link Float}, {@link String}, {@link Type}, {@link Handle}, {@link ConstantDynamic} or arrays
+      * of primitive types .
+      *
+      * @param value an object. Only {@link Type}, {@link Handle} and {@link ConstantDynamic} values
+      *     are remapped.
+      * @return the given value, remapped with this remapper.
+      */
+    public Object mapValue(final Object value) {
+        if (value instanceof Type) {
+            return mapType((Type) value);
+        }
+        if (value instanceof Handle) {
+            Handle handle = (Handle) value;
+            boolean isFieldHandle = handle.getTag() <= Opcodes.H_PUTSTATIC;
+
+            return new Handle(
+                    handle.getTag(),
+                    mapType(handle.getOwner()),
+                    isFieldHandle
+                            ? mapFieldName(handle.getOwner(), handle.getName(), handle.getDesc())
+                            : mapMethodName(handle.getOwner(), handle.getName(), handle.getDesc()),
+                    isFieldHandle ? mapDesc(handle.getDesc()) : mapMethodDesc(handle.getDesc()),
+                    handle.isInterface());
+        }
+        if (value instanceof ConstantDynamic) {
+            ConstantDynamic constantDynamic = (ConstantDynamic) value;
+            int bootstrapMethodArgumentCount = constantDynamic.getBootstrapMethodArgumentCount();
+            Object[] remappedBootstrapMethodArguments = new Object[bootstrapMethodArgumentCount];
+            for (int i = 0; i < bootstrapMethodArgumentCount; ++i) {
+                remappedBootstrapMethodArguments[i] =
+                        mapValue(constantDynamic.getBootstrapMethodArgument(i));
+            }
+            String descriptor = constantDynamic.getDescriptor();
+            return new ConstantDynamic(
+                    mapInvokeDynamicMethodName(constantDynamic.getName(), descriptor),
+                    mapDesc(descriptor),
+                    (Handle) mapValue(constantDynamic.getBootstrapMethod()),
+                    remappedBootstrapMethodArguments);
+        }
+        return value;
+    }
+
+    /**
+      * Returns the given signature, remapped with the {@link SignatureVisitor} returned by {@link
+      * #createSignatureRemapper(SignatureVisitor)}.
+      *
+      * @param signature a <i>JavaTypeSignature</i>, <i>ClassSignature</i> or <i>MethodSignature</i>.
+      * @param typeSignature whether the given signature is a <i>JavaTypeSignature</i>.
+      * @return signature the given signature, remapped with the {@link SignatureVisitor} returned by
+      *     {@link #createSignatureRemapper(SignatureVisitor)}.
+      */
+    public String mapSignature(final String signature, final boolean typeSignature) {
+        if (signature == null) {
+            return null;
+        }
+        SignatureReader signatureReader = new SignatureReader(signature);
+        SignatureWriter signatureWriter = new SignatureWriter();
+        SignatureVisitor signatureRemapper = createSignatureRemapper(signatureWriter);
+        if (typeSignature) {
+            signatureReader.acceptType(signatureRemapper);
+        } else {
+            signatureReader.accept(signatureRemapper);
+        }
+        return signatureWriter.toString();
+    }
+
+    /**
+      * Constructs a new remapper for signatures. The default implementation of this method returns a
+      * new {@link SignatureRemapper}.
+      *
+      * @param signatureVisitor the SignatureVisitor the remapper must delegate to.
+      * @return the newly created remapper.
+      * @deprecated use {@link #createSignatureRemapper} instead.
+      */
+    @Deprecated
+    protected SignatureVisitor createRemappingSignatureAdapter(
+            final SignatureVisitor signatureVisitor) {
+        return createSignatureRemapper(signatureVisitor);
+    }
+
+    /**
+      * Constructs a new remapper for signatures. The default implementation of this method returns a
+      * new {@link SignatureRemapper}.
+      *
+      * @param signatureVisitor the SignatureVisitor the remapper must delegate to.
+      * @return the newly created remapper.
+      */
+    protected SignatureVisitor createSignatureRemapper(final SignatureVisitor signatureVisitor) {
+        return new SignatureRemapper(signatureVisitor, this);
+    }
+
+    /**
+      * Maps an annotation attribute name. The default implementation of this method returns the given
+      * name, unchanged. Subclasses can override.
+      *
+      * @param descriptor the descriptor of the annotation class.
+      * @param name the name of the annotation attribute.
+      * @return the new name of the annotation attribute.
+      */
+    public String mapAnnotationAttributeName(final String descriptor, final String name) {
+        return name;
+    }
+
+    /**
+      * Maps an inner class name to its new name. The default implementation of this method provides a
+      * strategy that will work for inner classes produced by Java, but not necessarily other
+      * languages. Subclasses can override.
+      *
+      * @param name the fully-qualified internal name of the inner class (see {@link
+      *     Type#getInternalName()}).
+      * @param ownerName the internal name of the owner class of the inner class (see {@link
+      *     Type#getInternalName()}).
+      * @param innerName the internal name of the inner class (see {@link Type#getInternalName()}).
+      * @return the new inner name of the inner class.
+      */
+    public String mapInnerClassName(
+            final String name, final String ownerName, final String innerName) {
+        final String remappedInnerName = this.mapType(name);
+
+        if (remappedInnerName.equals(name)) {
+            return innerName;
+        } else {
+            int originSplit = name.lastIndexOf('/');
+            int remappedSplit = remappedInnerName.lastIndexOf('/');
+            if (originSplit != -1 && remappedSplit != -1) {
+                if (name.substring(originSplit).equals(remappedInnerName.substring(remappedSplit))) {
+                    // class name not changed
+                    return innerName;
+                }
+            }
+        }
+
+        if (remappedInnerName.contains("$")) {
+            int index = remappedInnerName.lastIndexOf('$') + 1;
+            while (index < remappedInnerName.length()
+                    && Character.isDigit(remappedInnerName.charAt(index))) {
+                index++;
+            }
+            return remappedInnerName.substring(index);
+        } else {
+            return innerName;
+        }
+    }
+
+    /**
+      * Maps a method name to its new name. The default implementation of this method returns the given
+      * name, unchanged. Subclasses can override.
+      *
+      * @param owner the internal name of the owner class of the method (see {@link
+      *     Type#getInternalName()}).
+      * @param name the name of the method.
+      * @param descriptor the descriptor of the method.
+      * @return the new name of the method.
+      */
+    public String mapMethodName(final String owner, final String name, final String descriptor) {
+        return name;
+    }
+
+    /**
+      * Maps an invokedynamic or a constant dynamic method name to its new name. The default
+      * implementation of this method returns the given name, unchanged. Subclasses can override.
+      *
+      * @param name the name of the method.
+      * @param descriptor the descriptor of the method.
+      * @return the new name of the method.
+      */
+    public String mapInvokeDynamicMethodName(final String name, final String descriptor) {
+        return name;
+    }
+
+    /**
+      * Maps a record component name to its new name. The default implementation of this method returns
+      * the given name, unchanged. Subclasses can override.
+      *
+      * @param owner the internal name of the owner class of the field (see {@link
+      *     Type#getInternalName()}).
+      * @param name the name of the field.
+      * @param descriptor the descriptor of the field.
+      * @return the new name of the field.
+      */
+    public String mapRecordComponentName(
+            final String owner, final String name, final String descriptor) {
+        return name;
+    }
+
+    /**
+      * Maps a field name to its new name. The default implementation of this method returns the given
+      * name, unchanged. Subclasses can override.
+      *
+      * @param owner the internal name of the owner class of the field (see {@link
+      *     Type#getInternalName()}).
+      * @param name the name of the field.
+      * @param descriptor the descriptor of the field.
+      * @return the new name of the field.
+      */
+    public String mapFieldName(final String owner, final String name, final String descriptor) {
+        return name;
+    }
+
+    /**
+      * Maps a package name to its new name. The default implementation of this method returns the
+      * given name, unchanged. Subclasses can override.
+      *
+      * @param name the fully qualified name of the package (using dots).
+      * @return the new name of the package.
+      */
+    public String mapPackageName(final String name) {
+        return name;
+    }
+
+    /**
+      * Maps a module name to its new name. The default implementation of this method returns the given
+      * name, unchanged. Subclasses can override.
+      *
+      * @param name the fully qualified name (using dots) of a module.
+      * @return the new name of the module.
+      */
+    public String mapModuleName(final String name) {
+        return name;
+    }
+
+    /**
+      * Maps the internal name of a class to its new name. The default implementation of this method
+      * returns the given name, unchanged. Subclasses can override.
+      *
+      * @param internalName the internal name of a class (see {@link Type#getInternalName()}).
+      * @return the new internal name (see {@link Type#getInternalName()}).
+      */
+    public String map(final String internalName) {
+        return internalName;
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/org/objectweb/asm/commons/RemappingAnnotationAdapter.class b/tests/test_data/std/jdk/internal/org/objectweb/asm/commons/RemappingAnnotationAdapter.class
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diff --git a/tests/test_data/std/jdk/internal/org/objectweb/asm/commons/RemappingAnnotationAdapter.java b/tests/test_data/std/jdk/internal/org/objectweb/asm/commons/RemappingAnnotationAdapter.java
new file mode 100644
index 00000000..0f41cff5
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/org/objectweb/asm/commons/RemappingAnnotationAdapter.java
@@ -0,0 +1,116 @@
+/*
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/*
+ * This file is available under and governed by the GNU General Public
+ * License version 2 only, as published by the Free Software Foundation.
+ * However, the following notice accompanied the original version of this
+ * file:
+ *
+ * ASM: a very small and fast Java bytecode manipulation framework
+ * Copyright (c) 2000-2011 INRIA, France Telecom
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the copyright holders nor the names of its
+ *    contributors may be used to endorse or promote products derived from
+ *    this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGE.
+ */
+package jdk.internal.org.objectweb.asm.commons;
+
+import jdk.internal.org.objectweb.asm.AnnotationVisitor;
+import jdk.internal.org.objectweb.asm.Opcodes;
+
+/**
+ * An {@link AnnotationVisitor} adapter for type remapping.
+ *
+ * @deprecated use {@link AnnotationRemapper} instead.
+ * @author Eugene Kuleshov
+ */
+@Deprecated
+public class RemappingAnnotationAdapter extends AnnotationVisitor {
+
+    protected final Remapper remapper;
+
+    public RemappingAnnotationAdapter(
+            final AnnotationVisitor annotationVisitor, final Remapper remapper) {
+        this(Opcodes.ASM9, annotationVisitor, remapper);
+    }
+
+    protected RemappingAnnotationAdapter(
+            final int api, final AnnotationVisitor annotationVisitor, final Remapper remapper) {
+        super(api, annotationVisitor);
+        this.remapper = remapper;
+    }
+
+    @Override
+    public void visit(final String name, final Object value) {
+        av.visit(name, remapper.mapValue(value));
+    }
+
+    @Override
+    public void visitEnum(final String name, final String descriptor, final String value) {
+        av.visitEnum(name, remapper.mapDesc(descriptor), value);
+    }
+
+    @Override
+    public AnnotationVisitor visitAnnotation(final String name, final String descriptor) {
+        AnnotationVisitor annotationVisitor = av.visitAnnotation(name, remapper.mapDesc(descriptor));
+        return annotationVisitor == null
+                ? null
+                : (annotationVisitor == av
+                        ? this
+                        : new RemappingAnnotationAdapter(annotationVisitor, remapper));
+    }
+
+    @Override
+    public AnnotationVisitor visitArray(final String name) {
+        AnnotationVisitor annotationVisitor = av.visitArray(name);
+        return annotationVisitor == null
+                ? null
+                : (annotationVisitor == av
+                        ? this
+                        : new RemappingAnnotationAdapter(annotationVisitor, remapper));
+    }
+}
+
diff --git a/tests/test_data/std/jdk/internal/org/objectweb/asm/commons/RemappingMethodAdapter.class b/tests/test_data/std/jdk/internal/org/objectweb/asm/commons/RemappingMethodAdapter.class
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HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/org/objectweb/asm/commons/RemappingMethodAdapter.java b/tests/test_data/std/jdk/internal/org/objectweb/asm/commons/RemappingMethodAdapter.java
new file mode 100644
index 00000000..68ad22a4
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/org/objectweb/asm/commons/RemappingMethodAdapter.java
@@ -0,0 +1,310 @@
+/*
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/*
+ * This file is available under and governed by the GNU General Public
+ * License version 2 only, as published by the Free Software Foundation.
+ * However, the following notice accompanied the original version of this
+ * file:
+ *
+ * ASM: a very small and fast Java bytecode manipulation framework
+ * Copyright (c) 2000-2011 INRIA, France Telecom
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the copyright holders nor the names of its
+ *    contributors may be used to endorse or promote products derived from
+ *    this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGE.
+ */
+package jdk.internal.org.objectweb.asm.commons;
+
+import jdk.internal.org.objectweb.asm.AnnotationVisitor;
+import jdk.internal.org.objectweb.asm.Handle;
+import jdk.internal.org.objectweb.asm.Label;
+import jdk.internal.org.objectweb.asm.MethodVisitor;
+import jdk.internal.org.objectweb.asm.Opcodes;
+import jdk.internal.org.objectweb.asm.TypePath;
+
+/**
+ * A {@link LocalVariablesSorter} for type mapping.
+ *
+ * @deprecated use {@link MethodRemapper} instead.
+ * @author Eugene Kuleshov
+ */
+@Deprecated
+public class RemappingMethodAdapter extends LocalVariablesSorter {
+
+    protected final Remapper remapper;
+
+    public RemappingMethodAdapter(
+            final int access,
+            final String descriptor,
+            final MethodVisitor methodVisitor,
+            final Remapper remapper) {
+        this(Opcodes.ASM9, access, descriptor, methodVisitor, remapper);
+    }
+
+    protected RemappingMethodAdapter(
+            final int api,
+            final int access,
+            final String descriptor,
+            final MethodVisitor methodVisitor,
+            final Remapper remapper) {
+        super(api, access, descriptor, methodVisitor);
+        this.remapper = remapper;
+    }
+
+    @Override
+    public AnnotationVisitor visitAnnotationDefault() {
+        AnnotationVisitor annotationVisitor = super.visitAnnotationDefault();
+        return annotationVisitor == null
+                ? annotationVisitor
+                : new RemappingAnnotationAdapter(annotationVisitor, remapper);
+    }
+
+    @Override
+    public AnnotationVisitor visitAnnotation(final String descriptor, final boolean visible) {
+        AnnotationVisitor annotationVisitor =
+                super.visitAnnotation(remapper.mapDesc(descriptor), visible);
+        return annotationVisitor == null
+                ? annotationVisitor
+                : new RemappingAnnotationAdapter(annotationVisitor, remapper);
+    }
+
+    @Override
+    public AnnotationVisitor visitTypeAnnotation(
+            final int typeRef, final TypePath typePath, final String descriptor, final boolean visible) {
+        AnnotationVisitor annotationVisitor =
+                super.visitTypeAnnotation(typeRef, typePath, remapper.mapDesc(descriptor), visible);
+        return annotationVisitor == null
+                ? annotationVisitor
+                : new RemappingAnnotationAdapter(annotationVisitor, remapper);
+    }
+
+    @Override
+    public AnnotationVisitor visitParameterAnnotation(
+            final int parameter, final String descriptor, final boolean visible) {
+        AnnotationVisitor annotationVisitor =
+                super.visitParameterAnnotation(parameter, remapper.mapDesc(descriptor), visible);
+        return annotationVisitor == null
+                ? annotationVisitor
+                : new RemappingAnnotationAdapter(annotationVisitor, remapper);
+    }
+
+    @Override
+    public void visitFrame(
+            final int type,
+            final int numLocal,
+            final Object[] local,
+            final int numStack,
+            final Object[] stack) {
+        super.visitFrame(
+                type, numLocal, remapEntries(numLocal, local), numStack, remapEntries(numStack, stack));
+    }
+
+    private Object[] remapEntries(final int numTypes, final Object[] entries) {
+        if (entries == null) {
+            return entries;
+        }
+        Object[] remappedEntries = null;
+        for (int i = 0; i < numTypes; ++i) {
+            if (entries[i] instanceof String) {
+                if (remappedEntries == null) {
+                    remappedEntries = new Object[numTypes];
+                    System.arraycopy(entries, 0, remappedEntries, 0, numTypes);
+                }
+                remappedEntries[i] = remapper.mapType((String) entries[i]);
+            }
+        }
+        return remappedEntries == null ? entries : remappedEntries;
+    }
+
+    @Override
+    public void visitFieldInsn(
+            final int opcode, final String owner, final String name, final String descriptor) {
+        super.visitFieldInsn(
+                opcode,
+                remapper.mapType(owner),
+                remapper.mapFieldName(owner, name, descriptor),
+                remapper.mapDesc(descriptor));
+    }
+
+    @Deprecated
+    @Override
+    public void visitMethodInsn(
+            final int opcode, final String owner, final String name, final String descriptor) {
+        if (api >= Opcodes.ASM5) {
+            super.visitMethodInsn(opcode, owner, name, descriptor);
+            return;
+        }
+        doVisitMethodInsn(opcode, owner, name, descriptor, opcode == Opcodes.INVOKEINTERFACE);
+    }
+
+    @Override
+    public void visitMethodInsn(
+            final int opcode,
+            final String owner,
+            final String name,
+            final String descriptor,
+            final boolean isInterface) {
+        if (api < Opcodes.ASM5) {
+            super.visitMethodInsn(opcode, owner, name, descriptor, isInterface);
+            return;
+        }
+        doVisitMethodInsn(opcode, owner, name, descriptor, isInterface);
+    }
+
+    private void doVisitMethodInsn(
+            final int opcode,
+            final String owner,
+            final String name,
+            final String descriptor,
+            final boolean isInterface) {
+        // Calling super.visitMethodInsn requires to call the correct version
+        // depending on this.api (otherwise infinite loops can occur). To
+        // simplify and to make it easier to automatically remove the backward
+        // compatibility code, we inline the code of the overridden method here.
+        // IMPORTANT: THIS ASSUMES THAT visitMethodInsn IS NOT OVERRIDDEN IN
+        // LocalVariableSorter.
+        if (mv != null) {
+            mv.visitMethodInsn(
+                    opcode,
+                    remapper.mapType(owner),
+                    remapper.mapMethodName(owner, name, descriptor),
+                    remapper.mapMethodDesc(descriptor),
+                    isInterface);
+        }
+    }
+
+    @Override
+    public void visitInvokeDynamicInsn(
+            final String name,
+            final String descriptor,
+            final Handle bootstrapMethodHandle,
+            final Object... bootstrapMethodArguments) {
+        for (int i = 0; i < bootstrapMethodArguments.length; i++) {
+            bootstrapMethodArguments[i] = remapper.mapValue(bootstrapMethodArguments[i]);
+        }
+        super.visitInvokeDynamicInsn(
+                remapper.mapInvokeDynamicMethodName(name, descriptor),
+                remapper.mapMethodDesc(descriptor),
+                (Handle) remapper.mapValue(bootstrapMethodHandle),
+                bootstrapMethodArguments);
+    }
+
+    @Override
+    public void visitTypeInsn(final int opcode, final String type) {
+        super.visitTypeInsn(opcode, remapper.mapType(type));
+    }
+
+    @Override
+    public void visitLdcInsn(final Object value) {
+        super.visitLdcInsn(remapper.mapValue(value));
+    }
+
+    @Override
+    public void visitMultiANewArrayInsn(final String descriptor, final int numDimensions) {
+        super.visitMultiANewArrayInsn(remapper.mapDesc(descriptor), numDimensions);
+    }
+
+    @Override
+    public AnnotationVisitor visitInsnAnnotation(
+            final int typeRef, final TypePath typePath, final String descriptor, final boolean visible) {
+        AnnotationVisitor annotationVisitor =
+                super.visitInsnAnnotation(typeRef, typePath, remapper.mapDesc(descriptor), visible);
+        return annotationVisitor == null
+                ? annotationVisitor
+                : new RemappingAnnotationAdapter(annotationVisitor, remapper);
+    }
+
+    @Override
+    public void visitTryCatchBlock(
+            final Label start, final Label end, final Label handler, final String type) {
+        super.visitTryCatchBlock(start, end, handler, type == null ? null : remapper.mapType(type));
+    }
+
+    @Override
+    public AnnotationVisitor visitTryCatchAnnotation(
+            final int typeRef, final TypePath typePath, final String descriptor, final boolean visible) {
+        AnnotationVisitor annotationVisitor =
+                super.visitTryCatchAnnotation(typeRef, typePath, remapper.mapDesc(descriptor), visible);
+        return annotationVisitor == null
+                ? annotationVisitor
+                : new RemappingAnnotationAdapter(annotationVisitor, remapper);
+    }
+
+    @Override
+    public void visitLocalVariable(
+            final String name,
+            final String descriptor,
+            final String signature,
+            final Label start,
+            final Label end,
+            final int index) {
+        super.visitLocalVariable(
+                name,
+                remapper.mapDesc(descriptor),
+                remapper.mapSignature(signature, true),
+                start,
+                end,
+                index);
+    }
+
+    @Override
+    public AnnotationVisitor visitLocalVariableAnnotation(
+            final int typeRef,
+            final TypePath typePath,
+            final Label[] start,
+            final Label[] end,
+            final int[] index,
+            final String descriptor,
+            final boolean visible) {
+        AnnotationVisitor annotationVisitor =
+                super.visitLocalVariableAnnotation(
+                        typeRef, typePath, start, end, index, remapper.mapDesc(descriptor), visible);
+        return annotationVisitor == null
+                ? annotationVisitor
+                : new RemappingAnnotationAdapter(annotationVisitor, remapper);
+    }
+}
+
diff --git a/tests/test_data/std/jdk/internal/org/objectweb/asm/commons/SerialVersionUIDAdder$Item.class b/tests/test_data/std/jdk/internal/org/objectweb/asm/commons/SerialVersionUIDAdder$Item.class
new file mode 100644
index 0000000000000000000000000000000000000000..b3530b51fb0582b8208faae1c74623a832c2a990
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literal 0
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diff --git a/tests/test_data/std/jdk/internal/org/objectweb/asm/commons/SerialVersionUIDAdder.class b/tests/test_data/std/jdk/internal/org/objectweb/asm/commons/SerialVersionUIDAdder.class
new file mode 100644
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/org/objectweb/asm/commons/SerialVersionUIDAdder.java b/tests/test_data/std/jdk/internal/org/objectweb/asm/commons/SerialVersionUIDAdder.java
new file mode 100644
index 00000000..58173483
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/org/objectweb/asm/commons/SerialVersionUIDAdder.java
@@ -0,0 +1,524 @@
+/*
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/*
+ * This file is available under and governed by the GNU General Public
+ * License version 2 only, as published by the Free Software Foundation.
+ * However, the following notice accompanied the original version of this
+ * file:
+ *
+ * ASM: a very small and fast Java bytecode manipulation framework
+ * Copyright (c) 2000-2011 INRIA, France Telecom
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the copyright holders nor the names of its
+ *    contributors may be used to endorse or promote products derived from
+ *    this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+package jdk.internal.org.objectweb.asm.commons;
+
+import java.io.ByteArrayOutputStream;
+import java.io.DataOutput;
+import java.io.DataOutputStream;
+import java.io.IOException;
+import java.security.MessageDigest;
+import java.security.NoSuchAlgorithmException;
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.Collection;
+import jdk.internal.org.objectweb.asm.ClassVisitor;
+import jdk.internal.org.objectweb.asm.FieldVisitor;
+import jdk.internal.org.objectweb.asm.MethodVisitor;
+import jdk.internal.org.objectweb.asm.Opcodes;
+
+/**
+ * A {@link ClassVisitor} that adds a serial version unique identifier to a class if missing. A
+ * typical usage of this class is:
+ *
+ * <pre>
+ *   ClassWriter classWriter = new ClassWriter(...);
+ *   ClassVisitor svuidAdder = new SerialVersionUIDAdder(classWriter);
+ *   ClassVisitor classVisitor = new MyClassAdapter(svuidAdder);
+ *   new ClassReader(orginalClass).accept(classVisitor, 0);
+ * </pre>
+ *
+ * <p>The SVUID algorithm can be found at <a href=
+ * "https://docs.oracle.com/javase/10/docs/specs/serialization/class.html#stream-unique-identifiers"
+ * >https://docs.oracle.com/javase/10/docs/specs/serialization/class.html#stream-unique-identifiers</a>:
+ *
+ * <p>The serialVersionUID is computed using the signature of a stream of bytes that reflect the
+ * class definition. The National Institute of Standards and Technology (NIST) Secure Hash Algorithm
+ * (SHA-1) is used to compute a signature for the stream. The first two 32-bit quantities are used
+ * to form a 64-bit hash. A java.lang.DataOutputStream is used to convert primitive data types to a
+ * sequence of bytes. The values input to the stream are defined by the Java Virtual Machine (VM)
+ * specification for classes.
+ *
+ * <p>The sequence of items in the stream is as follows:
+ *
+ * <ol>
+ *   <li>The class name written using UTF encoding.
+ *   <li>The class modifiers written as a 32-bit integer.
+ *   <li>The name of each interface sorted by name written using UTF encoding.
+ *   <li>For each field of the class sorted by field name (except private static and private
+ *       transient fields):
+ *       <ol>
+ *         <li>The name of the field in UTF encoding.
+ *         <li>The modifiers of the field written as a 32-bit integer.
+ *         <li>The descriptor of the field in UTF encoding
+ *       </ol>
+ *   <li>If a class initializer exists, write out the following:
+ *       <ol>
+ *         <li>The name of the method, &lt;clinit&gt;, in UTF encoding.
+ *         <li>The modifier of the method, STATIC, written as a 32-bit integer.
+ *         <li>The descriptor of the method, ()V, in UTF encoding.
+ *       </ol>
+ *   <li>For each non-private constructor sorted by method name and signature:
+ *       <ol>
+ *         <li>The name of the method, &lt;init&gt;, in UTF encoding.
+ *         <li>The modifiers of the method written as a 32-bit integer.
+ *         <li>The descriptor of the method in UTF encoding.
+ *       </ol>
+ *   <li>For each non-private method sorted by method name and signature:
+ *       <ol>
+ *         <li>The name of the method in UTF encoding.
+ *         <li>The modifiers of the method written as a 32-bit integer.
+ *         <li>The descriptor of the method in UTF encoding.
+ *       </ol>
+ *   <li>The SHA-1 algorithm is executed on the stream of bytes produced by DataOutputStream and
+ *       produces five 32-bit values sha[0..4].
+ *   <li>The hash value is assembled from the first and second 32-bit values of the SHA-1 message
+ *       digest. If the result of the message digest, the five 32-bit words H0 H1 H2 H3 H4, is in an
+ *       array of five int values named sha, the hash value would be computed as follows: long hash
+ *       = ((sha[0] &gt;&gt;&gt; 24) &amp; 0xFF) | ((sha[0] &gt;&gt;&gt; 16) &amp; 0xFF) &lt;&lt; 8
+ *       | ((sha[0] &gt;&gt;&gt; 8) &amp; 0xFF) &lt;&lt; 16 | ((sha[0] &gt;&gt;&gt; 0) &amp; 0xFF)
+ *       &lt;&lt; 24 | ((sha[1] &gt;&gt;&gt; 24) &amp; 0xFF) &lt;&lt; 32 | ((sha[1] &gt;&gt;&gt; 16)
+ *       &amp; 0xFF) &lt;&lt; 40 | ((sha[1] &gt;&gt;&gt; 8) &amp; 0xFF) &lt;&lt; 48 | ((sha[1]
+ *       &gt;&gt;&gt; 0) &amp; 0xFF) &lt;&lt; 56;
+ * </ol>
+ *
+ * @author Rajendra Inamdar, Vishal Vishnoi
+ */
+// DontCheck(AbbreviationAsWordInName): can't be renamed (for backward binary compatibility).
+public class SerialVersionUIDAdder extends ClassVisitor {
+
+    /** The JVM name of static initializer methods. */
+    private static final String CLINIT = "<clinit>";
+
+    /** A flag that indicates if we need to compute SVUID. */
+    private boolean computeSvuid;
+
+    /** Whether the class already has a SVUID. */
+    private boolean hasSvuid;
+
+    /** The class access flags. */
+    private int access;
+
+    /** The internal name of the class. */
+    private String name;
+
+    /** The interfaces implemented by the class. */
+    private String[] interfaces;
+
+    /** The fields of the class that are needed to compute the SVUID. */
+    private Collection<Item> svuidFields;
+
+    /** Whether the class has a static initializer. */
+    private boolean hasStaticInitializer;
+
+    /** The constructors of the class that are needed to compute the SVUID. */
+    private Collection<Item> svuidConstructors;
+
+    /** The methods of the class that are needed to compute the SVUID. */
+    private Collection<Item> svuidMethods;
+
+    /**
+      * Constructs a new {@link SerialVersionUIDAdder}. <i>Subclasses must not use this
+      * constructor</i>. Instead, they must use the {@link #SerialVersionUIDAdder(int, ClassVisitor)}
+      * version.
+      *
+      * @param classVisitor a {@link ClassVisitor} to which this visitor will delegate calls.
+      * @throws IllegalStateException If a subclass calls this constructor.
+      */
+    public SerialVersionUIDAdder(final ClassVisitor classVisitor) {
+        this(/* latest api = */ Opcodes.ASM9, classVisitor);
+        if (getClass() != SerialVersionUIDAdder.class) {
+            throw new IllegalStateException();
+        }
+    }
+
+    /**
+      * Constructs a new {@link SerialVersionUIDAdder}.
+      *
+      * @param api the ASM API version implemented by this visitor. Must be one of the {@code
+      *     ASM}<i>x</i> values in {@link Opcodes}.
+      * @param classVisitor a {@link ClassVisitor} to which this visitor will delegate calls.
+      */
+    protected SerialVersionUIDAdder(final int api, final ClassVisitor classVisitor) {
+        super(api, classVisitor);
+    }
+
+    // -----------------------------------------------------------------------------------------------
+    // Overridden methods
+    // -----------------------------------------------------------------------------------------------
+
+    @Override
+    public void visit(
+            final int version,
+            final int access,
+            final String name,
+            final String signature,
+            final String superName,
+            final String[] interfaces) {
+        // Get the class name, access flags, and interfaces information (step 1, 2 and 3) for SVUID
+        // computation.
+        computeSvuid = (access & Opcodes.ACC_ENUM) == 0;
+
+        if (computeSvuid) {
+            this.name = name;
+            this.access = access;
+            this.interfaces = interfaces.clone();
+            this.svuidFields = new ArrayList<>();
+            this.svuidConstructors = new ArrayList<>();
+            this.svuidMethods = new ArrayList<>();
+        }
+
+        super.visit(version, access, name, signature, superName, interfaces);
+    }
+
+    @Override
+    public MethodVisitor visitMethod(
+            final int access,
+            final String name,
+            final String descriptor,
+            final String signature,
+            final String[] exceptions) {
+        // Get constructor and method information (step 5 and 7). Also determine if there is a class
+        // initializer (step 6).
+        if (computeSvuid) {
+            if (CLINIT.equals(name)) {
+                hasStaticInitializer = true;
+            }
+            // Collect the non private constructors and methods. Only the ACC_PUBLIC, ACC_PRIVATE,
+            // ACC_PROTECTED, ACC_STATIC, ACC_FINAL, ACC_SYNCHRONIZED, ACC_NATIVE, ACC_ABSTRACT and
+            // ACC_STRICT flags are used.
+            int mods =
+                    access
+                            & (Opcodes.ACC_PUBLIC
+                                    | Opcodes.ACC_PRIVATE
+                                    | Opcodes.ACC_PROTECTED
+                                    | Opcodes.ACC_STATIC
+                                    | Opcodes.ACC_FINAL
+                                    | Opcodes.ACC_SYNCHRONIZED
+                                    | Opcodes.ACC_NATIVE
+                                    | Opcodes.ACC_ABSTRACT
+                                    | Opcodes.ACC_STRICT);
+
+            if ((access & Opcodes.ACC_PRIVATE) == 0) {
+                if ("<init>".equals(name)) {
+                    svuidConstructors.add(new Item(name, mods, descriptor));
+                } else if (!CLINIT.equals(name)) {
+                    svuidMethods.add(new Item(name, mods, descriptor));
+                }
+            }
+        }
+
+        return super.visitMethod(access, name, descriptor, signature, exceptions);
+    }
+
+    @Override
+    public FieldVisitor visitField(
+            final int access,
+            final String name,
+            final String desc,
+            final String signature,
+            final Object value) {
+        // Get the class field information for step 4 of the algorithm. Also determine if the class
+        // already has a SVUID.
+        if (computeSvuid) {
+            if ("serialVersionUID".equals(name)) {
+                // Since the class already has SVUID, we won't be computing it.
+                computeSvuid = false;
+                hasSvuid = true;
+            }
+            // Collect the non private fields. Only the ACC_PUBLIC, ACC_PRIVATE, ACC_PROTECTED,
+            // ACC_STATIC, ACC_FINAL, ACC_VOLATILE, and ACC_TRANSIENT flags are used when computing
+            // serialVersionUID values.
+            if ((access & Opcodes.ACC_PRIVATE) == 0
+                    || (access & (Opcodes.ACC_STATIC | Opcodes.ACC_TRANSIENT)) == 0) {
+                int mods =
+                        access
+                                & (Opcodes.ACC_PUBLIC
+                                        | Opcodes.ACC_PRIVATE
+                                        | Opcodes.ACC_PROTECTED
+                                        | Opcodes.ACC_STATIC
+                                        | Opcodes.ACC_FINAL
+                                        | Opcodes.ACC_VOLATILE
+                                        | Opcodes.ACC_TRANSIENT);
+                svuidFields.add(new Item(name, mods, desc));
+            }
+        }
+
+        return super.visitField(access, name, desc, signature, value);
+    }
+
+    @Override
+    public void visitInnerClass(
+            final String innerClassName,
+            final String outerName,
+            final String innerName,
+            final int innerClassAccess) {
+        // Handles a bizarre special case. Nested classes (static classes declared inside another class)
+        // that are protected have their access bit set to public in their class files to deal with some
+        // odd reflection situation. Our SVUID computation must do as the JVM does and ignore access
+        // bits in the class file in favor of the access bits of the InnerClass attribute.
+        if ((name != null) && name.equals(innerClassName)) {
+            this.access = innerClassAccess;
+        }
+        super.visitInnerClass(innerClassName, outerName, innerName, innerClassAccess);
+    }
+
+    @Override
+    public void visitEnd() {
+        // Add the SVUID field to the class if it doesn't have one.
+        if (computeSvuid && !hasSvuid) {
+            try {
+                addSVUID(computeSVUID());
+            } catch (IOException e) {
+                throw new IllegalStateException("Error while computing SVUID for " + name, e);
+            }
+        }
+
+        super.visitEnd();
+    }
+
+    // -----------------------------------------------------------------------------------------------
+    // Utility methods
+    // -----------------------------------------------------------------------------------------------
+
+    /**
+      * Returns true if the class already has a SVUID field. The result of this method is only valid
+      * when visitEnd has been called.
+      *
+      * @return true if the class already has a SVUID field.
+      */
+    // DontCheck(AbbreviationAsWordInName): can't be renamed (for backward binary compatibility).
+    public boolean hasSVUID() {
+        return hasSvuid;
+    }
+
+    /**
+      * Adds a final static serialVersionUID field to the class, with the given value.
+      *
+      * @param svuid the serialVersionUID field value.
+      */
+    // DontCheck(AbbreviationAsWordInName): can't be renamed (for backward binary compatibility).
+    protected void addSVUID(final long svuid) {
+        FieldVisitor fieldVisitor =
+                super.visitField(
+                        Opcodes.ACC_FINAL + Opcodes.ACC_STATIC, "serialVersionUID", "J", null, svuid);
+        if (fieldVisitor != null) {
+            fieldVisitor.visitEnd();
+        }
+    }
+
+    /**
+      * Computes and returns the value of SVUID.
+      *
+      * @return the serial version UID.
+      * @throws IOException if an I/O error occurs.
+      */
+    // DontCheck(AbbreviationAsWordInName): can't be renamed (for backward binary compatibility).
+    protected long computeSVUID() throws IOException {
+        long svuid = 0;
+
+        try (ByteArrayOutputStream byteArrayOutputStream = new ByteArrayOutputStream();
+                DataOutputStream dataOutputStream = new DataOutputStream(byteArrayOutputStream)) {
+
+            // 1. The class name written using UTF encoding.
+            dataOutputStream.writeUTF(name.replace('/', '.'));
+
+            // 2. The class modifiers written as a 32-bit integer.
+            int mods = access;
+            if ((mods & Opcodes.ACC_INTERFACE) != 0) {
+                mods =
+                        svuidMethods.isEmpty() ? (mods & ~Opcodes.ACC_ABSTRACT) : (mods | Opcodes.ACC_ABSTRACT);
+            }
+            dataOutputStream.writeInt(
+                    mods
+                            & (Opcodes.ACC_PUBLIC
+                                    | Opcodes.ACC_FINAL
+                                    | Opcodes.ACC_INTERFACE
+                                    | Opcodes.ACC_ABSTRACT));
+
+            // 3. The name of each interface sorted by name written using UTF encoding.
+            Arrays.sort(interfaces);
+            for (String interfaceName : interfaces) {
+                dataOutputStream.writeUTF(interfaceName.replace('/', '.'));
+            }
+
+            // 4. For each field of the class sorted by field name (except private static and private
+            // transient fields):
+            //   1. The name of the field in UTF encoding.
+            //   2. The modifiers of the field written as a 32-bit integer.
+            //   3. The descriptor of the field in UTF encoding.
+            // Note that field signatures are not dot separated. Method and constructor signatures are dot
+            // separated. Go figure...
+            writeItems(svuidFields, dataOutputStream, false);
+
+            // 5. If a class initializer exists, write out the following:
+            //   1. The name of the method, <clinit>, in UTF encoding.
+            //   2. The modifier of the method, ACC_STATIC, written as a 32-bit integer.
+            //   3. The descriptor of the method, ()V, in UTF encoding.
+            if (hasStaticInitializer) {
+                dataOutputStream.writeUTF(CLINIT);
+                dataOutputStream.writeInt(Opcodes.ACC_STATIC);
+                dataOutputStream.writeUTF("()V");
+            }
+
+            // 6. For each non-private constructor sorted by method name and signature:
+            //   1. The name of the method, <init>, in UTF encoding.
+            //   2. The modifiers of the method written as a 32-bit integer.
+            //   3. The descriptor of the method in UTF encoding.
+            writeItems(svuidConstructors, dataOutputStream, true);
+
+            // 7. For each non-private method sorted by method name and signature:
+            //   1. The name of the method in UTF encoding.
+            //   2. The modifiers of the method written as a 32-bit integer.
+            //   3. The descriptor of the method in UTF encoding.
+            writeItems(svuidMethods, dataOutputStream, true);
+
+            dataOutputStream.flush();
+
+            // 8. The SHA-1 algorithm is executed on the stream of bytes produced by DataOutputStream and
+            // produces five 32-bit values sha[0..4].
+            byte[] hashBytes = computeSHAdigest(byteArrayOutputStream.toByteArray());
+
+            // 9. The hash value is assembled from the first and second 32-bit values of the SHA-1 message
+            // digest. If the result of the message digest, the five 32-bit words H0 H1 H2 H3 H4, is in an
+            // array of five int values named sha, the hash value would be computed as follows:
+            for (int i = Math.min(hashBytes.length, 8) - 1; i >= 0; i--) {
+                svuid = (svuid << 8) | (hashBytes[i] & 0xFF);
+            }
+        }
+
+        return svuid;
+    }
+
+    /**
+      * Returns the SHA-1 message digest of the given value.
+      *
+      * @param value the value whose SHA message digest must be computed.
+      * @return the SHA-1 message digest of the given value.
+      */
+    // DontCheck(AbbreviationAsWordInName): can't be renamed (for backward binary compatibility).
+    protected byte[] computeSHAdigest(final byte[] value) {
+        try {
+            return MessageDigest.getInstance("SHA").digest(value);
+        } catch (NoSuchAlgorithmException e) {
+            throw new UnsupportedOperationException(e);
+        }
+    }
+
+    /**
+      * Sorts the items in the collection and writes it to the given output stream.
+      *
+      * @param itemCollection a collection of items.
+      * @param dataOutputStream where the items must be written.
+      * @param dotted whether package names must use dots, instead of slashes.
+      * @exception IOException if an error occurs.
+      */
+    private static void writeItems(
+            final Collection<Item> itemCollection,
+            final DataOutput dataOutputStream,
+            final boolean dotted)
+            throws IOException {
+        Item[] items = itemCollection.toArray(new Item[0]);
+        Arrays.sort(items);
+        for (Item item : items) {
+            dataOutputStream.writeUTF(item.name);
+            dataOutputStream.writeInt(item.access);
+            dataOutputStream.writeUTF(dotted ? item.descriptor.replace('/', '.') : item.descriptor);
+        }
+    }
+
+    // -----------------------------------------------------------------------------------------------
+    // Inner classes
+    // -----------------------------------------------------------------------------------------------
+
+    private static final class Item implements Comparable<Item> {
+
+        final String name;
+        final int access;
+        final String descriptor;
+
+        Item(final String name, final int access, final String descriptor) {
+            this.name = name;
+            this.access = access;
+            this.descriptor = descriptor;
+        }
+
+        @Override
+        public int compareTo(final Item item) {
+            int result = name.compareTo(item.name);
+            if (result == 0) {
+                result = descriptor.compareTo(item.descriptor);
+            }
+            return result;
+        }
+
+        @Override
+        public boolean equals(final Object other) {
+            if (other instanceof Item) {
+                return compareTo((Item) other) == 0;
+            }
+            return false;
+        }
+
+        @Override
+        public int hashCode() {
+            return name.hashCode() ^ descriptor.hashCode();
+        }
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/org/objectweb/asm/commons/SignatureRemapper.class b/tests/test_data/std/jdk/internal/org/objectweb/asm/commons/SignatureRemapper.class
new file mode 100644
index 0000000000000000000000000000000000000000..b580edd4e18ced920157ca097db68b83185b4479
GIT binary patch
literal 3963
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/org/objectweb/asm/commons/SignatureRemapper.java b/tests/test_data/std/jdk/internal/org/objectweb/asm/commons/SignatureRemapper.java
new file mode 100644
index 00000000..5fb41c84
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/org/objectweb/asm/commons/SignatureRemapper.java
@@ -0,0 +1,204 @@
+/*
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/*
+ * This file is available under and governed by the GNU General Public
+ * License version 2 only, as published by the Free Software Foundation.
+ * However, the following notice accompanied the original version of this
+ * file:
+ *
+ * ASM: a very small and fast Java bytecode manipulation framework
+ * Copyright (c) 2000-2011 INRIA, France Telecom
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the copyright holders nor the names of its
+ *    contributors may be used to endorse or promote products derived from
+ *    this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+package jdk.internal.org.objectweb.asm.commons;
+
+import java.util.ArrayList;
+import jdk.internal.org.objectweb.asm.Opcodes;
+import jdk.internal.org.objectweb.asm.signature.SignatureVisitor;
+
+/**
+ * A {@link SignatureVisitor} that remaps types with a {@link Remapper}.
+ *
+ * @author Eugene Kuleshov
+ */
+public class SignatureRemapper extends SignatureVisitor {
+
+    private final SignatureVisitor signatureVisitor;
+
+    private final Remapper remapper;
+
+    private ArrayList<String> classNames = new ArrayList<>();
+
+    /**
+      * Constructs a new {@link SignatureRemapper}. <i>Subclasses must not use this constructor</i>.
+      * Instead, they must use the {@link #SignatureRemapper(int,SignatureVisitor,Remapper)} version.
+      *
+      * @param signatureVisitor the signature visitor this remapper must delegate to.
+      * @param remapper the remapper to use to remap the types in the visited signature.
+      */
+    public SignatureRemapper(final SignatureVisitor signatureVisitor, final Remapper remapper) {
+        this(/* latest api = */ Opcodes.ASM9, signatureVisitor, remapper);
+    }
+
+    /**
+      * Constructs a new {@link SignatureRemapper}.
+      *
+      * @param api the ASM API version supported by this remapper. Must be one of the {@code
+      *     ASM}<i>x</i> values in {@link Opcodes}.
+      * @param signatureVisitor the signature visitor this remapper must delegate to.
+      * @param remapper the remapper to use to remap the types in the visited signature.
+      */
+    protected SignatureRemapper(
+            final int api, final SignatureVisitor signatureVisitor, final Remapper remapper) {
+        super(api);
+        this.signatureVisitor = signatureVisitor;
+        this.remapper = remapper;
+    }
+
+    @Override
+    public void visitClassType(final String name) {
+        classNames.add(name);
+        signatureVisitor.visitClassType(remapper.mapType(name));
+    }
+
+    @Override
+    public void visitInnerClassType(final String name) {
+        String outerClassName = classNames.remove(classNames.size() - 1);
+        String className = outerClassName + '$' + name;
+        classNames.add(className);
+        String remappedOuter = remapper.mapType(outerClassName) + '$';
+        String remappedName = remapper.mapType(className);
+        int index =
+                remappedName.startsWith(remappedOuter)
+                        ? remappedOuter.length()
+                        : remappedName.lastIndexOf('$') + 1;
+        signatureVisitor.visitInnerClassType(remappedName.substring(index));
+    }
+
+    @Override
+    public void visitFormalTypeParameter(final String name) {
+        signatureVisitor.visitFormalTypeParameter(name);
+    }
+
+    @Override
+    public void visitTypeVariable(final String name) {
+        signatureVisitor.visitTypeVariable(name);
+    }
+
+    @Override
+    public SignatureVisitor visitArrayType() {
+        signatureVisitor.visitArrayType();
+        return this;
+    }
+
+    @Override
+    public void visitBaseType(final char descriptor) {
+        signatureVisitor.visitBaseType(descriptor);
+    }
+
+    @Override
+    public SignatureVisitor visitClassBound() {
+        signatureVisitor.visitClassBound();
+        return this;
+    }
+
+    @Override
+    public SignatureVisitor visitExceptionType() {
+        signatureVisitor.visitExceptionType();
+        return this;
+    }
+
+    @Override
+    public SignatureVisitor visitInterface() {
+        signatureVisitor.visitInterface();
+        return this;
+    }
+
+    @Override
+    public SignatureVisitor visitInterfaceBound() {
+        signatureVisitor.visitInterfaceBound();
+        return this;
+    }
+
+    @Override
+    public SignatureVisitor visitParameterType() {
+        signatureVisitor.visitParameterType();
+        return this;
+    }
+
+    @Override
+    public SignatureVisitor visitReturnType() {
+        signatureVisitor.visitReturnType();
+        return this;
+    }
+
+    @Override
+    public SignatureVisitor visitSuperclass() {
+        signatureVisitor.visitSuperclass();
+        return this;
+    }
+
+    @Override
+    public void visitTypeArgument() {
+        signatureVisitor.visitTypeArgument();
+    }
+
+    @Override
+    public SignatureVisitor visitTypeArgument(final char wildcard) {
+        signatureVisitor.visitTypeArgument(wildcard);
+        return this;
+    }
+
+    @Override
+    public void visitEnd() {
+        signatureVisitor.visitEnd();
+        classNames.remove(classNames.size() - 1);
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/org/objectweb/asm/commons/SimpleRemapper.class b/tests/test_data/std/jdk/internal/org/objectweb/asm/commons/SimpleRemapper.class
new file mode 100644
index 0000000000000000000000000000000000000000..6bb898f5354835ead786d0c56c3203d3d230b8a7
GIT binary patch
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/org/objectweb/asm/commons/SimpleRemapper.java b/tests/test_data/std/jdk/internal/org/objectweb/asm/commons/SimpleRemapper.java
new file mode 100644
index 00000000..9b298b15
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/org/objectweb/asm/commons/SimpleRemapper.java
@@ -0,0 +1,135 @@
+/*
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/*
+ * This file is available under and governed by the GNU General Public
+ * License version 2 only, as published by the Free Software Foundation.
+ * However, the following notice accompanied the original version of this
+ * file:
+ *
+ * ASM: a very small and fast Java bytecode manipulation framework
+ * Copyright (c) 2000-2011 INRIA, France Telecom
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the copyright holders nor the names of its
+ *    contributors may be used to endorse or promote products derived from
+ *    this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+package jdk.internal.org.objectweb.asm.commons;
+
+import java.util.Collections;
+import java.util.Map;
+
+/**
+ * A {@link Remapper} using a {@link Map} to define its mapping.
+ *
+ * @author Eugene Kuleshov
+ */
+public class SimpleRemapper extends Remapper {
+
+    private final Map<String, String> mapping;
+
+    /**
+      * Constructs a new {@link SimpleRemapper} with the given mapping.
+      *
+      * @param mapping a map specifying a remapping as follows:
+      *     <ul>
+      *       <li>for method names, the key is the owner, name and descriptor of the method (in the
+      *           form &lt;owner&gt;.&lt;name&gt;&lt;descriptor&gt;), and the value is the new method
+      *           name.
+      *       <li>for invokedynamic method names, the key is the name and descriptor of the method (in
+      *           the form .&lt;name&gt;&lt;descriptor&gt;), and the value is the new method name.
+      *       <li>for field and attribute names, the key is the owner and name of the field or
+      *           attribute (in the form &lt;owner&gt;.&lt;name&gt;), and the value is the new field
+      *           name.
+      *       <li>for internal names, the key is the old internal name, and the value is the new
+      *           internal name (see {@link jdk.internal.org.objectweb.asm.Type#getInternalName()}).
+      *     </ul>
+      */
+    public SimpleRemapper(final Map<String, String> mapping) {
+        this.mapping = mapping;
+    }
+
+    /**
+      * Constructs a new {@link SimpleRemapper} with the given mapping.
+      *
+      * @param oldName the key corresponding to a method, field or internal name (see {@link
+      *     #SimpleRemapper(Map)} for the format of these keys).
+      * @param newName the new method, field or internal name (see {@link
+      *     jdk.internal.org.objectweb.asm.Type#getInternalName()}).
+      */
+    public SimpleRemapper(final String oldName, final String newName) {
+        this.mapping = Collections.singletonMap(oldName, newName);
+    }
+
+    @Override
+    public String mapMethodName(final String owner, final String name, final String descriptor) {
+        String remappedName = map(owner + '.' + name + descriptor);
+        return remappedName == null ? name : remappedName;
+    }
+
+    @Override
+    public String mapInvokeDynamicMethodName(final String name, final String descriptor) {
+        String remappedName = map('.' + name + descriptor);
+        return remappedName == null ? name : remappedName;
+    }
+
+    @Override
+    public String mapAnnotationAttributeName(final String descriptor, final String name) {
+        String remappedName = map(descriptor + '.' + name);
+        return remappedName == null ? name : remappedName;
+    }
+
+    @Override
+    public String mapFieldName(final String owner, final String name, final String descriptor) {
+        String remappedName = map(owner + '.' + name);
+        return remappedName == null ? name : remappedName;
+    }
+
+    @Override
+    public String map(final String key) {
+        return mapping.get(key);
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/org/objectweb/asm/commons/StaticInitMerger.class b/tests/test_data/std/jdk/internal/org/objectweb/asm/commons/StaticInitMerger.class
new file mode 100644
index 0000000000000000000000000000000000000000..422e02c843407a3489d9039f0e2452720ae629b1
GIT binary patch
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/org/objectweb/asm/commons/StaticInitMerger.java b/tests/test_data/std/jdk/internal/org/objectweb/asm/commons/StaticInitMerger.java
new file mode 100644
index 00000000..1a03a9e0
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/org/objectweb/asm/commons/StaticInitMerger.java
@@ -0,0 +1,156 @@
+/*
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/*
+ * This file is available under and governed by the GNU General Public
+ * License version 2 only, as published by the Free Software Foundation.
+ * However, the following notice accompanied the original version of this
+ * file:
+ *
+ * ASM: a very small and fast Java bytecode manipulation framework
+ * Copyright (c) 2000-2011 INRIA, France Telecom
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the copyright holders nor the names of its
+ *    contributors may be used to endorse or promote products derived from
+ *    this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+package jdk.internal.org.objectweb.asm.commons;
+
+import jdk.internal.org.objectweb.asm.ClassVisitor;
+import jdk.internal.org.objectweb.asm.MethodVisitor;
+import jdk.internal.org.objectweb.asm.Opcodes;
+
+/**
+ * A {@link ClassVisitor} that merges &lt;clinit&gt; methods into a single one. All the existing
+ * &lt;clinit&gt; methods are renamed, and a new one is created, which calls all the renamed
+ * methods.
+ *
+ * @author Eric Bruneton
+ */
+public class StaticInitMerger extends ClassVisitor {
+
+    /** The internal name of the visited class. */
+    private String owner;
+
+    /** The prefix to use to rename the existing &lt;clinit&gt; methods. */
+    private final String renamedClinitMethodPrefix;
+
+    /** The number of &lt;clinit&gt; methods visited so far. */
+    private int numClinitMethods;
+
+    /** The MethodVisitor for the merged &lt;clinit&gt; method. */
+    private MethodVisitor mergedClinitVisitor;
+
+    /**
+      * Constructs a new {@link StaticInitMerger}. <i>Subclasses must not use this constructor</i>.
+      * Instead, they must use the {@link #StaticInitMerger(int, String, ClassVisitor)} version.
+      *
+      * @param prefix the prefix to use to rename the existing &lt;clinit&gt; methods.
+      * @param classVisitor the class visitor to which this visitor must delegate method calls. May be
+      *     null.
+      */
+    public StaticInitMerger(final String prefix, final ClassVisitor classVisitor) {
+        this(/* latest api = */ Opcodes.ASM9, prefix, classVisitor);
+    }
+
+    /**
+      * Constructs a new {@link StaticInitMerger}.
+      *
+      * @param api the ASM API version implemented by this visitor. Must be one of the {@code
+      *     ASM}<i>x</i> values in {@link Opcodes}.
+      * @param prefix the prefix to use to rename the existing &lt;clinit&gt; methods.
+      * @param classVisitor the class visitor to which this visitor must delegate method calls. May be
+      *     null.
+      */
+    protected StaticInitMerger(final int api, final String prefix, final ClassVisitor classVisitor) {
+        super(api, classVisitor);
+        this.renamedClinitMethodPrefix = prefix;
+    }
+
+    @Override
+    public void visit(
+            final int version,
+            final int access,
+            final String name,
+            final String signature,
+            final String superName,
+            final String[] interfaces) {
+        super.visit(version, access, name, signature, superName, interfaces);
+        this.owner = name;
+    }
+
+    @Override
+    public MethodVisitor visitMethod(
+            final int access,
+            final String name,
+            final String descriptor,
+            final String signature,
+            final String[] exceptions) {
+        MethodVisitor methodVisitor;
+        if ("<clinit>".equals(name)) {
+            int newAccess = Opcodes.ACC_PRIVATE + Opcodes.ACC_STATIC;
+            String newName = renamedClinitMethodPrefix + numClinitMethods++;
+            methodVisitor = super.visitMethod(newAccess, newName, descriptor, signature, exceptions);
+
+            if (mergedClinitVisitor == null) {
+                mergedClinitVisitor = super.visitMethod(newAccess, name, descriptor, null, null);
+            }
+            mergedClinitVisitor.visitMethodInsn(Opcodes.INVOKESTATIC, owner, newName, descriptor, false);
+        } else {
+            methodVisitor = super.visitMethod(access, name, descriptor, signature, exceptions);
+        }
+        return methodVisitor;
+    }
+
+    @Override
+    public void visitEnd() {
+        if (mergedClinitVisitor != null) {
+            mergedClinitVisitor.visitInsn(Opcodes.RETURN);
+            mergedClinitVisitor.visitMaxs(0, 0);
+        }
+        super.visitEnd();
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/org/objectweb/asm/commons/TableSwitchGenerator.class b/tests/test_data/std/jdk/internal/org/objectweb/asm/commons/TableSwitchGenerator.class
new file mode 100644
index 0000000000000000000000000000000000000000..b3ca61ba2c750726bbd6e40eb5d48a82aa0a5726
GIT binary patch
literal 260
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z&)Xfq6rBJSfl0PM$y7VGnv^s)ktWJGc2|xh6}gN}o*P}rEk%kq*VM(w1#7nCj15o|
z=x1~xsYoYs{Wb-<$!CJ6RItD(T(16HSy9AlGTaIDzV3_<bXHEF8kW4hF=rd|JXL<<
e;8)GK3~2~>!~X|Vd|Vw3l#v0No(Qx`j`j-=nn~gS

literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/org/objectweb/asm/commons/TableSwitchGenerator.java b/tests/test_data/std/jdk/internal/org/objectweb/asm/commons/TableSwitchGenerator.java
new file mode 100644
index 00000000..0f8ada93
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/org/objectweb/asm/commons/TableSwitchGenerator.java
@@ -0,0 +1,83 @@
+/*
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/*
+ * This file is available under and governed by the GNU General Public
+ * License version 2 only, as published by the Free Software Foundation.
+ * However, the following notice accompanied the original version of this
+ * file:
+ *
+ * ASM: a very small and fast Java bytecode manipulation framework
+ * Copyright (c) 2000-2011 INRIA, France Telecom
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the copyright holders nor the names of its
+ *    contributors may be used to endorse or promote products derived from
+ *    this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+package jdk.internal.org.objectweb.asm.commons;
+
+import jdk.internal.org.objectweb.asm.Label;
+
+/**
+ * A code generator for switch statements.
+ *
+ * @author Juozas Baliuka
+ * @author Chris Nokleberg
+ * @author Eric Bruneton
+ */
+public interface TableSwitchGenerator {
+
+    /**
+      * Generates the code for a switch case.
+      *
+      * @param key the switch case key.
+      * @param end a label that corresponds to the end of the switch statement.
+      */
+    void generateCase(int key, Label end);
+
+    /** Generates the code for the default switch case. */
+    void generateDefault();
+}
diff --git a/tests/test_data/std/jdk/internal/org/objectweb/asm/commons/TryCatchBlockSorter$1.class b/tests/test_data/std/jdk/internal/org/objectweb/asm/commons/TryCatchBlockSorter$1.class
new file mode 100644
index 0000000000000000000000000000000000000000..58672854ab0dd951ed2f4c16a3344323cf5ddecd
GIT binary patch
literal 1929
zcmbVN%Tg0T6g^D>Az_g4Q1Ok3LK0*EABe#yMl54RunLNOXVQkjNsrESeC%Aga-n{Q
z8><kjTv)FCD9hWOh(MI2NNT$K_H>_f-}Cd=x9<S*xEDtUA~8fQbfSx4VYB?ycBK-5
z<eu#Z727Xu3P-&ZC7Xv;+wrSaUxxNt@H)?xvvJq+ou{jQKo`bl7`oJk8;(sAPVw+S
z*#x=~k0D{92NpwelfU4$$7RJ{G0G6nf-7B>V~9+o))QpH5et1tGW3+RLPa4fYJ=hC
zL@PB^AjDo{mi@BGrV4QkU@(Ru3rBH`kPdGSgXPLl1vN*x<T{3_wv;N!P!`=#W#bse
zi5N~=IEB*;*IH=uZ;Kc@L&XEdV7J9y<R#%5S0r#2=VBPKa2}%!lkL#|(VZdY%CdO1
z@`Pc&y;v-k$W`1?8e%6D!x*!0QClAovaI7hZeao`!l#6M#sk6dygmFqiE9Yj@<;Qv
zR3U~8!;neNnsPlmZ&cyR4;XH@)aHOn%BI#CqIpV0hQ6XJ#d57$62TfTd9*W7^d0W4
z^T5?|V>7A?k0IB}m;+eHX0lXkkA&Lr%a3`$tAdJ}FbCA`TGuY4LZ53z^zSqzhGw`~
zhW;iFhJ;Djg3ccXR$%C+*f+#+a__#TkZs;c(WUsRTajGVbc*oiBlVqq;cMBv{$pH@
z%uB5LwZIYgT^*|7J!w;KlT%u8itCbeJU?`0rS5SHi@Mi!zi>lWEy*%1mqn-^_#xG-
zRgh8yd5?#o2r)wW-wlQ|STd>GHg)nSJw2GDH<xLZqq&3TL^|^YEd3R+&m?tVipDOw
z3A}|(<FWcFOk;*5I&aVzW@+6?$KE9AFx4528ulR~^areTW*fcfNgB$ZNZt+n&H#_p
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zgZgM#({+>`)=^wHtbG{79BvTHSvoOKt4MN@?7B%i+OD~VUA^hd4-8MzvyDsp4Xb<1
uGDh?^D72sA<Y)?memapg-dMmbGv{!d<|uth?%=N38K6(Db~7Vp^ZO0$U;$D9

literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/org/objectweb/asm/commons/TryCatchBlockSorter.class b/tests/test_data/std/jdk/internal/org/objectweb/asm/commons/TryCatchBlockSorter.class
new file mode 100644
index 0000000000000000000000000000000000000000..ee17e079434145623ea139fe18ab003ef1da5522
GIT binary patch
literal 2226
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zw-f{zPF!v5YNqXT*VZk~ahsa6eU%&jJA7Nyy_UAoHk=0cf`|e!gb`7os2D?(;mnAu
zhSO>}wx?~n?-q66*tuXi#%|4VDHlVeVA`gCmf?d;xiTWqI`?;+M&0yG-*NMFT;J0*
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Jo)MP(`wRQIMDhRt

literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/org/objectweb/asm/commons/TryCatchBlockSorter.java b/tests/test_data/std/jdk/internal/org/objectweb/asm/commons/TryCatchBlockSorter.java
new file mode 100644
index 00000000..6cd6b1ec
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/org/objectweb/asm/commons/TryCatchBlockSorter.java
@@ -0,0 +1,157 @@
+/*
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/*
+ * This file is available under and governed by the GNU General Public
+ * License version 2 only, as published by the Free Software Foundation.
+ * However, the following notice accompanied the original version of this
+ * file:
+ *
+ * ASM: a very small and fast Java bytecode manipulation framework
+ * Copyright (c) 2000-2011 INRIA, France Telecom
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the copyright holders nor the names of its
+ *    contributors may be used to endorse or promote products derived from
+ *    this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+package jdk.internal.org.objectweb.asm.commons;
+
+import java.util.Collections;
+import java.util.Comparator;
+import jdk.internal.org.objectweb.asm.MethodVisitor;
+import jdk.internal.org.objectweb.asm.Opcodes;
+import jdk.internal.org.objectweb.asm.tree.MethodNode;
+import jdk.internal.org.objectweb.asm.tree.TryCatchBlockNode;
+
+/**
+ * A {@link MethodVisitor} adapter to sort the exception handlers. The handlers are sorted in a
+ * method innermost-to-outermost. This allows the programmer to add handlers without worrying about
+ * ordering them correctly with respect to existing, in-code handlers.
+ *
+ * <p>Behavior is only defined for properly-nested handlers. If any "try" blocks overlap (something
+ * that isn't possible in Java code) then this may not do what you want. In fact, this adapter just
+ * sorts by the length of the "try" block, taking advantage of the fact that a given try block must
+ * be larger than any block it contains).
+ *
+ * @author Adrian Sampson
+ */
+public class TryCatchBlockSorter extends MethodNode {
+
+    /**
+      * Constructs a new {@link TryCatchBlockSorter}.
+      *
+      * @param methodVisitor the method visitor to which this visitor must delegate method calls. May
+      *     be {@literal null}.
+      * @param access the method's access flags (see {@link Opcodes}). This parameter also indicates if
+      *     the method is synthetic and/or deprecated.
+      * @param name the method's name.
+      * @param descriptor the method's descriptor (see {@link jdk.internal.org.objectweb.asm.Type}).
+      * @param signature the method's signature. May be {@literal null} if the method parameters,
+      *     return type and exceptions do not use generic types.
+      * @param exceptions the internal names of the method's exception classes (see {@link
+      *     jdk.internal.org.objectweb.asm.Type#getInternalName()}). May be {@literal null}.
+      */
+    public TryCatchBlockSorter(
+            final MethodVisitor methodVisitor,
+            final int access,
+            final String name,
+            final String descriptor,
+            final String signature,
+            final String[] exceptions) {
+        this(
+                /* latest api = */ Opcodes.ASM9,
+                methodVisitor,
+                access,
+                name,
+                descriptor,
+                signature,
+                exceptions);
+        if (getClass() != TryCatchBlockSorter.class) {
+            throw new IllegalStateException();
+        }
+    }
+
+    protected TryCatchBlockSorter(
+            final int api,
+            final MethodVisitor methodVisitor,
+            final int access,
+            final String name,
+            final String descriptor,
+            final String signature,
+            final String[] exceptions) {
+        super(api, access, name, descriptor, signature, exceptions);
+        this.mv = methodVisitor;
+    }
+
+    @Override
+    public void visitEnd() {
+        // Sort the TryCatchBlockNode elements by the length of their "try" block.
+        Collections.sort(
+                tryCatchBlocks,
+                new Comparator<TryCatchBlockNode>() {
+
+                    @Override
+                    public int compare(
+                            final TryCatchBlockNode tryCatchBlockNode1,
+                            final TryCatchBlockNode tryCatchBlockNode2) {
+                        return blockLength(tryCatchBlockNode1) - blockLength(tryCatchBlockNode2);
+                    }
+
+                    private int blockLength(final TryCatchBlockNode tryCatchBlockNode) {
+                        int startIndex = instructions.indexOf(tryCatchBlockNode.start);
+                        int endIndex = instructions.indexOf(tryCatchBlockNode.end);
+                        return endIndex - startIndex;
+                    }
+                });
+        // Update the 'target' of each try catch block annotation.
+        for (int i = 0; i < tryCatchBlocks.size(); ++i) {
+            tryCatchBlocks.get(i).updateIndex(i);
+        }
+        if (mv != null) {
+            accept(mv);
+        }
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/org/objectweb/asm/signature/SignatureReader.class b/tests/test_data/std/jdk/internal/org/objectweb/asm/signature/SignatureReader.class
new file mode 100644
index 0000000000000000000000000000000000000000..6766880d494b03456dd39bf758aa1a7b565750c0
GIT binary patch
literal 3151
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zYdh_vG5+b$L}3$~hSU`)0U;tynGlb9V-q0whlfDoAtYcD4-F6?7_T9%p{x0Q-}Q}K
zF$ryzb$!qM&UeoFo%8+9x%c~*pZx}aaV$pBg+LgFi6BCP_(^Ng%2q6=lsz(Y(k|2m
zp}l3NTptw#QiD?wbR!Z*)I<!X;MSAHxop{~+pc3(vQ@W~t!k@N_Dt5Q&1Y-nl4I2y
zuAQCqr3u?A+OD8?T{mS_8n$55p-$|{x?6TiBT@8XLl|)r8?ossaNY)jtJqGdenNxG
ztL=Rz66mL*aKduO2;WHM2gj9WtBGxRgCJaXiuUOvvw~nMpC8m#Z#0p_b%IE(F;mmA
z1^r6<YM2JFGmKp(-h}G~dtQ45rpmQ)y~+}7T~yM+sylC0j@`Fl-)Xtlyv<??5~=@<
zJUA7_0N!lkEl3GAXyfsURjci<Hk_hhUy5*F^Lez<u-4s3n;1fdWmvG>nynxSj=l<#
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/org/objectweb/asm/signature/SignatureReader.java b/tests/test_data/std/jdk/internal/org/objectweb/asm/signature/SignatureReader.java
new file mode 100644
index 00000000..76901452
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/org/objectweb/asm/signature/SignatureReader.java
@@ -0,0 +1,284 @@
+/*
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/*
+ * This file is available under and governed by the GNU General Public
+ * License version 2 only, as published by the Free Software Foundation.
+ * However, the following notice accompanied the original version of this
+ * file:
+ *
+ * ASM: a very small and fast Java bytecode manipulation framework
+ * Copyright (c) 2000-2011 INRIA, France Telecom
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the copyright holders nor the names of its
+ *    contributors may be used to endorse or promote products derived from
+ *    this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+package jdk.internal.org.objectweb.asm.signature;
+
+/**
+ * A parser for signature literals, as defined in the Java Virtual Machine Specification (JVMS), to
+ * visit them with a SignatureVisitor.
+ *
+ * @see <a href="https://docs.oracle.com/javase/specs/jvms/se9/html/jvms-4.html#jvms-4.7.9.1">JVMS
+ *     4.7.9.1</a>
+ * @author Thomas Hallgren
+ * @author Eric Bruneton
+ */
+public class SignatureReader {
+
+    /** The JVMS signature to be read. */
+    private final String signatureValue;
+
+    /**
+      * Constructs a {@link SignatureReader} for the given signature.
+      *
+      * @param signature A <i>JavaTypeSignature</i>, <i>ClassSignature</i> or <i>MethodSignature</i>.
+      */
+    public SignatureReader(final String signature) {
+        this.signatureValue = signature;
+    }
+
+    /**
+      * Makes the given visitor visit the signature of this {@link SignatureReader}. This signature is
+      * the one specified in the constructor (see {@link #SignatureReader}). This method is intended to
+      * be called on a {@link SignatureReader} that was created using a <i>ClassSignature</i> (such as
+      * the <code>signature</code> parameter of the {@link jdk.internal.org.objectweb.asm.ClassVisitor#visit}
+      * method) or a <i>MethodSignature</i> (such as the <code>signature</code> parameter of the {@link
+      * jdk.internal.org.objectweb.asm.ClassVisitor#visitMethod} method).
+      *
+      * @param signatureVistor the visitor that must visit this signature.
+      */
+    public void accept(final SignatureVisitor signatureVistor) {
+        String signature = this.signatureValue;
+        int length = signature.length();
+        int offset; // Current offset in the parsed signature (parsed from left to right).
+        char currentChar; // The signature character at 'offset', or just before.
+
+        // If the signature starts with '<', it starts with TypeParameters, i.e. a formal type parameter
+        // identifier, followed by one or more pair ':',ReferenceTypeSignature (for its class bound and
+        // interface bounds).
+        if (signature.charAt(0) == '<') {
+            // Invariant: offset points to the second character of a formal type parameter name at the
+            // beginning of each iteration of the loop below.
+            offset = 2;
+            do {
+                // The formal type parameter name is everything between offset - 1 and the first ':'.
+                int classBoundStartOffset = signature.indexOf(':', offset);
+                signatureVistor.visitFormalTypeParameter(
+                        signature.substring(offset - 1, classBoundStartOffset));
+
+                // If the character after the ':' class bound marker is not the start of a
+                // ReferenceTypeSignature, it means the class bound is empty (which is a valid case).
+                offset = classBoundStartOffset + 1;
+                currentChar = signature.charAt(offset);
+                if (currentChar == 'L' || currentChar == '[' || currentChar == 'T') {
+                    offset = parseType(signature, offset, signatureVistor.visitClassBound());
+                }
+
+                // While the character after the class bound or after the last parsed interface bound
+                // is ':', we need to parse another interface bound.
+                while ((currentChar = signature.charAt(offset++)) == ':') {
+                    offset = parseType(signature, offset, signatureVistor.visitInterfaceBound());
+                }
+
+                // At this point a TypeParameter has been fully parsed, and we need to parse the next one
+                // (note that currentChar is now the first character of the next TypeParameter, and that
+                // offset points to the second character), unless the character just after this
+                // TypeParameter signals the end of the TypeParameters.
+            } while (currentChar != '>');
+        } else {
+            offset = 0;
+        }
+
+        // If the (optional) TypeParameters is followed by '(' this means we are parsing a
+        // MethodSignature, which has JavaTypeSignature type inside parentheses, followed by a Result
+        // type and optional ThrowsSignature types.
+        if (signature.charAt(offset) == '(') {
+            offset++;
+            while (signature.charAt(offset) != ')') {
+                offset = parseType(signature, offset, signatureVistor.visitParameterType());
+            }
+            // Use offset + 1 to skip ')'.
+            offset = parseType(signature, offset + 1, signatureVistor.visitReturnType());
+            while (offset < length) {
+                // Use offset + 1 to skip the first character of a ThrowsSignature, i.e. '^'.
+                offset = parseType(signature, offset + 1, signatureVistor.visitExceptionType());
+            }
+        } else {
+            // Otherwise we are parsing a ClassSignature (by hypothesis on the method input), which has
+            // one or more ClassTypeSignature for the super class and the implemented interfaces.
+            offset = parseType(signature, offset, signatureVistor.visitSuperclass());
+            while (offset < length) {
+                offset = parseType(signature, offset, signatureVistor.visitInterface());
+            }
+        }
+    }
+
+    /**
+      * Makes the given visitor visit the signature of this {@link SignatureReader}. This signature is
+      * the one specified in the constructor (see {@link #SignatureReader}). This method is intended to
+      * be called on a {@link SignatureReader} that was created using a <i>JavaTypeSignature</i>, such
+      * as the <code>signature</code> parameter of the {@link
+      * jdk.internal.org.objectweb.asm.ClassVisitor#visitField} or {@link
+      * jdk.internal.org.objectweb.asm.MethodVisitor#visitLocalVariable} methods.
+      *
+      * @param signatureVisitor the visitor that must visit this signature.
+      */
+    public void acceptType(final SignatureVisitor signatureVisitor) {
+        parseType(signatureValue, 0, signatureVisitor);
+    }
+
+    /**
+      * Parses a JavaTypeSignature and makes the given visitor visit it.
+      *
+      * @param signature a string containing the signature that must be parsed.
+      * @param startOffset index of the first character of the signature to parsed.
+      * @param signatureVisitor the visitor that must visit this signature.
+      * @return the index of the first character after the parsed signature.
+      */
+    private static int parseType(
+            final String signature, final int startOffset, final SignatureVisitor signatureVisitor) {
+        int offset = startOffset; // Current offset in the parsed signature.
+        char currentChar = signature.charAt(offset++); // The signature character at 'offset'.
+
+        // Switch based on the first character of the JavaTypeSignature, which indicates its kind.
+        switch (currentChar) {
+            case 'Z':
+            case 'C':
+            case 'B':
+            case 'S':
+            case 'I':
+            case 'F':
+            case 'J':
+            case 'D':
+            case 'V':
+                // Case of a BaseType or a VoidDescriptor.
+                signatureVisitor.visitBaseType(currentChar);
+                return offset;
+
+            case '[':
+                // Case of an ArrayTypeSignature, a '[' followed by a JavaTypeSignature.
+                return parseType(signature, offset, signatureVisitor.visitArrayType());
+
+            case 'T':
+                // Case of TypeVariableSignature, an identifier between 'T' and ';'.
+                int endOffset = signature.indexOf(';', offset);
+                signatureVisitor.visitTypeVariable(signature.substring(offset, endOffset));
+                return endOffset + 1;
+
+            case 'L':
+                // Case of a ClassTypeSignature, which ends with ';'.
+                // These signatures have a main class type followed by zero or more inner class types
+                // (separated by '.'). Each can have type arguments, inside '<' and '>'.
+                int start = offset; // The start offset of the currently parsed main or inner class name.
+                boolean visited = false; // Whether the currently parsed class name has been visited.
+                boolean inner = false; // Whether we are currently parsing an inner class type.
+                // Parses the signature, one character at a time.
+                while (true) {
+                    currentChar = signature.charAt(offset++);
+                    if (currentChar == '.' || currentChar == ';') {
+                        // If a '.' or ';' is encountered, this means we have fully parsed the main class name
+                        // or an inner class name. This name may already have been visited it is was followed by
+                        // type arguments between '<' and '>'. If not, we need to visit it here.
+                        if (!visited) {
+                            String name = signature.substring(start, offset - 1);
+                            if (inner) {
+                                signatureVisitor.visitInnerClassType(name);
+                            } else {
+                                signatureVisitor.visitClassType(name);
+                            }
+                        }
+                        // If we reached the end of the ClassTypeSignature return, otherwise start the parsing
+                        // of a new class name, which is necessarily an inner class name.
+                        if (currentChar == ';') {
+                            signatureVisitor.visitEnd();
+                            break;
+                        }
+                        start = offset;
+                        visited = false;
+                        inner = true;
+                    } else if (currentChar == '<') {
+                        // If a '<' is encountered, this means we have fully parsed the main class name or an
+                        // inner class name, and that we now need to parse TypeArguments. First, we need to
+                        // visit the parsed class name.
+                        String name = signature.substring(start, offset - 1);
+                        if (inner) {
+                            signatureVisitor.visitInnerClassType(name);
+                        } else {
+                            signatureVisitor.visitClassType(name);
+                        }
+                        visited = true;
+                        // Now, parse the TypeArgument(s), one at a time.
+                        while ((currentChar = signature.charAt(offset)) != '>') {
+                            switch (currentChar) {
+                                case '*':
+                                    // Unbounded TypeArgument.
+                                    ++offset;
+                                    signatureVisitor.visitTypeArgument();
+                                    break;
+                                case '+':
+                                case '-':
+                                    // Extends or Super TypeArgument. Use offset + 1 to skip the '+' or '-'.
+                                    offset =
+                                            parseType(
+                                                    signature, offset + 1, signatureVisitor.visitTypeArgument(currentChar));
+                                    break;
+                                default:
+                                    // Instanceof TypeArgument. The '=' is implicit.
+                                    offset = parseType(signature, offset, signatureVisitor.visitTypeArgument('='));
+                                    break;
+                            }
+                        }
+                    }
+                }
+                return offset;
+
+            default:
+                throw new IllegalArgumentException();
+        }
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/org/objectweb/asm/signature/SignatureVisitor.class b/tests/test_data/std/jdk/internal/org/objectweb/asm/signature/SignatureVisitor.class
new file mode 100644
index 0000000000000000000000000000000000000000..ce7b79d9052069c68bbce819d779f0581d88539c
GIT binary patch
literal 2443
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zP}0)UB0AboU=L)5Oge^&mW~-(3Vs3P-95<`wj61aX7Ap2_j%rD-;bO7?cbk&0g%VX
zafA?#B9g!mh8d1-@_RgMal4*f-Pja{&oI1T+NOV%A)KD6MiFDUxLMoEnzk>b&8@5>
z>sd#iy)QPh+-qc4UBjsfFN_f&jF?)YY8h6`kXj-j&ryc6d*O<fCF<N-lJ#ao*nZ&)
zL%6=_*ij@Ij_;kT_|mlN%T3d&2^q&Y!ZA#e@H@8GbX`aKqBhN4b6Ra3Pv8Vj(iOPt
z3cJQImoDvR%FP^bwaIgeBBdx!F`P;lpMCIj0<U74A?7=QM23m<K?sqK;jGH`Ifltz
za;hV^fQwPQmOvUa4Da>HwrAFD?l+~#RyuE0(=&ZXQpqS246MiyEqt<GC||3Pm1h{u
zJGSR@+plt~DZ<nWvkXI(J8Om8%9vw_7t59PrE<Qox}rRb3=zsel^%JjEyGyJv_-ku
z*bs7^Z&>6>mK=jyRW40sx1ACHGt*<pm7e<&IZ|8kxv_PNyKT}F_tgDX9NFO3`U6+2
zamgEk+L6@R^ro~NC^Jdcu)M`RZ`o<8c34yedUh`#o?Q}lOfweMBz(#Z(Pj<eRGO}k
zh6=`T<p1YLpLXo(R+s4LyDg}ecHjw)?T$j=9M#xm?uo#Tr1PpSahf<ony#+<xIUxy
zJN4*@Sdx-I2!MeqosYoLxsEMlmv@h=Gn))oDdr1hE_R>h*Wi+h5Yt)<svhx*)0Bo-
zF;zcJ?r-PIs-}@MG#w%8$Ouj%gIO?KA}fSBvM+bpS+cKm*{@?l%@ds+C+ra3Amp25
zeMgq!D`s}UQpu4P7E;N03-hVuOD$YUB@-=VQpwR4&Zm+`S~&d(V|O26{O%5pB`3Bq
zmD<M3+jwOMXC7x#KjQokL>9(dv`(py9X2Vz7KQ$tKDQojz{lHqPY1<3-XV*^YjF(k
z()%dbe{?t$#RWzteFAW<tyV!5kf|sk9c7rdfG@jP*)A)?`^eEg!vYrD6qmG3=*+`?
z9A9aU1nn#CKpE9~0OZ#_ksl0z{H7=J!vT=r_CziXfc(BEa(Mvc!=A|e0LY(uBCny)
zuF9c>eWHO=LDjnoyP|uW;d=kx`1KHqPH)^8K>zPO^%wgG|D#XvkNQ*m*@xmL{aFOV
zJWHLcM`r(c{M9ADGad{#QECI{>8a-G;86VC6}&SPYCLYW^Iz^C{GXn|SM`*wJq6ud
B!At-E

literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/org/objectweb/asm/signature/SignatureVisitor.java b/tests/test_data/std/jdk/internal/org/objectweb/asm/signature/SignatureVisitor.java
new file mode 100644
index 00000000..5be537ba
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/org/objectweb/asm/signature/SignatureVisitor.java
@@ -0,0 +1,241 @@
+/*
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/*
+ * This file is available under and governed by the GNU General Public
+ * License version 2 only, as published by the Free Software Foundation.
+ * However, the following notice accompanied the original version of this
+ * file:
+ *
+ * ASM: a very small and fast Java bytecode manipulation framework
+ * Copyright (c) 2000-2011 INRIA, France Telecom
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the copyright holders nor the names of its
+ *    contributors may be used to endorse or promote products derived from
+ *    this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+package jdk.internal.org.objectweb.asm.signature;
+
+import jdk.internal.org.objectweb.asm.Opcodes;
+
+/**
+ * A visitor to visit a generic signature. The methods of this interface must be called in one of
+ * the three following orders (the last one is the only valid order for a {@link SignatureVisitor}
+ * that is returned by a method of this interface):
+ *
+ * <ul>
+ *   <li><i>ClassSignature</i> = ( {@code visitFormalTypeParameter} {@code visitClassBound}? {@code
+ *       visitInterfaceBound}* )* ({@code visitSuperclass} {@code visitInterface}* )
+ *   <li><i>MethodSignature</i> = ( {@code visitFormalTypeParameter} {@code visitClassBound}? {@code
+ *       visitInterfaceBound}* )* ({@code visitParameterType}* {@code visitReturnType} {@code
+ *       visitExceptionType}* )
+ *   <li><i>TypeSignature</i> = {@code visitBaseType} | {@code visitTypeVariable} | {@code
+ *       visitArrayType} | ( {@code visitClassType} {@code visitTypeArgument}* ( {@code
+ *       visitInnerClassType} {@code visitTypeArgument}* )* {@code visitEnd} ) )
+ * </ul>
+ *
+ * @author Thomas Hallgren
+ * @author Eric Bruneton
+ */
+public abstract class SignatureVisitor {
+
+    /** Wildcard for an "extends" type argument. */
+    public static final char EXTENDS = '+';
+
+    /** Wildcard for a "super" type argument. */
+    public static final char SUPER = '-';
+
+    /** Wildcard for a normal type argument. */
+    public static final char INSTANCEOF = '=';
+
+    /**
+      * The ASM API version implemented by this visitor. The value of this field must be one of the
+      * {@code ASM}<i>x</i> values in {@link Opcodes}.
+      */
+    protected final int api;
+
+    /**
+      * Constructs a new {@link SignatureVisitor}.
+      *
+      * @param api the ASM API version implemented by this visitor. Must be one of the {@code
+      *     ASM}<i>x</i> values in {@link Opcodes}.
+      */
+    protected SignatureVisitor(final int api) {
+        if (api != Opcodes.ASM9
+                && api != Opcodes.ASM8
+                && api != Opcodes.ASM7
+                && api != Opcodes.ASM6
+                && api != Opcodes.ASM5
+                && api != Opcodes.ASM4) {
+            throw new IllegalArgumentException("Unsupported api " + api);
+        }
+        this.api = api;
+    }
+
+    /**
+      * Visits a formal type parameter.
+      *
+      * @param name the name of the formal parameter.
+      */
+    public void visitFormalTypeParameter(final String name) {}
+
+    /**
+      * Visits the class bound of the last visited formal type parameter.
+      *
+      * @return a non null visitor to visit the signature of the class bound.
+      */
+    public SignatureVisitor visitClassBound() {
+        return this;
+    }
+
+    /**
+      * Visits an interface bound of the last visited formal type parameter.
+      *
+      * @return a non null visitor to visit the signature of the interface bound.
+      */
+    public SignatureVisitor visitInterfaceBound() {
+        return this;
+    }
+
+    /**
+      * Visits the type of the super class.
+      *
+      * @return a non null visitor to visit the signature of the super class type.
+      */
+    public SignatureVisitor visitSuperclass() {
+        return this;
+    }
+
+    /**
+      * Visits the type of an interface implemented by the class.
+      *
+      * @return a non null visitor to visit the signature of the interface type.
+      */
+    public SignatureVisitor visitInterface() {
+        return this;
+    }
+
+    /**
+      * Visits the type of a method parameter.
+      *
+      * @return a non null visitor to visit the signature of the parameter type.
+      */
+    public SignatureVisitor visitParameterType() {
+        return this;
+    }
+
+    /**
+      * Visits the return type of the method.
+      *
+      * @return a non null visitor to visit the signature of the return type.
+      */
+    public SignatureVisitor visitReturnType() {
+        return this;
+    }
+
+    /**
+      * Visits the type of a method exception.
+      *
+      * @return a non null visitor to visit the signature of the exception type.
+      */
+    public SignatureVisitor visitExceptionType() {
+        return this;
+    }
+
+    /**
+      * Visits a signature corresponding to a primitive type.
+      *
+      * @param descriptor the descriptor of the primitive type, or 'V' for {@code void} .
+      */
+    public void visitBaseType(final char descriptor) {}
+
+    /**
+      * Visits a signature corresponding to a type variable.
+      *
+      * @param name the name of the type variable.
+      */
+    public void visitTypeVariable(final String name) {}
+
+    /**
+      * Visits a signature corresponding to an array type.
+      *
+      * @return a non null visitor to visit the signature of the array element type.
+      */
+    public SignatureVisitor visitArrayType() {
+        return this;
+    }
+
+    /**
+      * Starts the visit of a signature corresponding to a class or interface type.
+      *
+      * @param name the internal name of the class or interface (see {@link
+      *     jdk.internal.org.objectweb.asm.Type#getInternalName()}).
+      */
+    public void visitClassType(final String name) {}
+
+    /**
+      * Visits an inner class.
+      *
+      * @param name the local name of the inner class in its enclosing class.
+      */
+    public void visitInnerClassType(final String name) {}
+
+    /** Visits an unbounded type argument of the last visited class or inner class type. */
+    public void visitTypeArgument() {}
+
+    /**
+      * Visits a type argument of the last visited class or inner class type.
+      *
+      * @param wildcard '+', '-' or '='.
+      * @return a non null visitor to visit the signature of the type argument.
+      */
+    public SignatureVisitor visitTypeArgument(final char wildcard) {
+        return this;
+    }
+
+    /** Ends the visit of a signature corresponding to a class or interface type. */
+    public void visitEnd() {}
+}
diff --git a/tests/test_data/std/jdk/internal/org/objectweb/asm/signature/SignatureWriter.class b/tests/test_data/std/jdk/internal/org/objectweb/asm/signature/SignatureWriter.class
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diff --git a/tests/test_data/std/jdk/internal/org/objectweb/asm/signature/SignatureWriter.java b/tests/test_data/std/jdk/internal/org/objectweb/asm/signature/SignatureWriter.java
new file mode 100644
index 00000000..077a9292
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/org/objectweb/asm/signature/SignatureWriter.java
@@ -0,0 +1,279 @@
+/*
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/*
+ * This file is available under and governed by the GNU General Public
+ * License version 2 only, as published by the Free Software Foundation.
+ * However, the following notice accompanied the original version of this
+ * file:
+ *
+ * ASM: a very small and fast Java bytecode manipulation framework
+ * Copyright (c) 2000-2011 INRIA, France Telecom
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the copyright holders nor the names of its
+ *    contributors may be used to endorse or promote products derived from
+ *    this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+package jdk.internal.org.objectweb.asm.signature;
+
+import jdk.internal.org.objectweb.asm.Opcodes;
+
+/**
+ * A SignatureVisitor that generates signature literals, as defined in the Java Virtual Machine
+ * Specification (JVMS).
+ *
+ * @see <a href="https://docs.oracle.com/javase/specs/jvms/se9/html/jvms-4.html#jvms-4.7.9.1">JVMS
+ *     4.7.9.1</a>
+ * @author Thomas Hallgren
+ * @author Eric Bruneton
+ */
+public class SignatureWriter extends SignatureVisitor {
+
+    /** The builder used to construct the visited signature. */
+    private final StringBuilder stringBuilder;
+
+    /** Whether the visited signature contains formal type parameters. */
+    private boolean hasFormals;
+
+    /** Whether the visited signature contains method parameter types. */
+    private boolean hasParameters;
+
+    /**
+      * The stack used to keep track of class types that have arguments. Each element of this stack is
+      * a boolean encoded in one bit. The top of the stack is the least significant bit. The bottom of
+      * the stack is a sentinel element always equal to 1 (used to detect when the stack is full).
+      * Pushing false = {@code <<= 1}, pushing true = {@code ( <<= 1) | 1}, popping = {@code >>>= 1}.
+      *
+      * <p>Class type arguments must be surrounded with '&lt;' and '&gt;' and, because
+      *
+      * <ol>
+      *   <li>class types can be nested (because type arguments can themselves be class types),
+      *   <li>SignatureWriter always returns 'this' in each visit* method (to avoid allocating new
+      *       SignatureWriter instances),
+      * </ol>
+      *
+      * <p>we need a stack to properly balance these angle brackets. A new element is pushed on this
+      * stack for each new visited type, and popped when the visit of this type ends (either in
+      * visitEnd, or because visitInnerClassType is called).
+      */
+    private int argumentStack = 1;
+
+    /** Constructs a new {@link SignatureWriter}. */
+    public SignatureWriter() {
+        this(new StringBuilder());
+    }
+
+    private SignatureWriter(final StringBuilder stringBuilder) {
+        super(/* latest api =*/ Opcodes.ASM9);
+        this.stringBuilder = stringBuilder;
+    }
+
+    // -----------------------------------------------------------------------------------------------
+    // Implementation of the SignatureVisitor interface
+    // -----------------------------------------------------------------------------------------------
+
+    @Override
+    public void visitFormalTypeParameter(final String name) {
+        if (!hasFormals) {
+            hasFormals = true;
+            stringBuilder.append('<');
+        }
+        stringBuilder.append(name);
+        stringBuilder.append(':');
+    }
+
+    @Override
+    public SignatureVisitor visitClassBound() {
+        return this;
+    }
+
+    @Override
+    public SignatureVisitor visitInterfaceBound() {
+        stringBuilder.append(':');
+        return this;
+    }
+
+    @Override
+    public SignatureVisitor visitSuperclass() {
+        endFormals();
+        return this;
+    }
+
+    @Override
+    public SignatureVisitor visitInterface() {
+        return this;
+    }
+
+    @Override
+    public SignatureVisitor visitParameterType() {
+        endFormals();
+        if (!hasParameters) {
+            hasParameters = true;
+            stringBuilder.append('(');
+        }
+        return this;
+    }
+
+    @Override
+    public SignatureVisitor visitReturnType() {
+        endFormals();
+        if (!hasParameters) {
+            stringBuilder.append('(');
+        }
+        stringBuilder.append(')');
+        return this;
+    }
+
+    @Override
+    public SignatureVisitor visitExceptionType() {
+        stringBuilder.append('^');
+        return this;
+    }
+
+    @Override
+    public void visitBaseType(final char descriptor) {
+        stringBuilder.append(descriptor);
+    }
+
+    @Override
+    public void visitTypeVariable(final String name) {
+        stringBuilder.append('T');
+        stringBuilder.append(name);
+        stringBuilder.append(';');
+    }
+
+    @Override
+    public SignatureVisitor visitArrayType() {
+        stringBuilder.append('[');
+        return this;
+    }
+
+    @Override
+    public void visitClassType(final String name) {
+        stringBuilder.append('L');
+        stringBuilder.append(name);
+        // Pushes 'false' on the stack, meaning that this type does not have type arguments (as far as
+        // we can tell at this point).
+        argumentStack <<= 1;
+    }
+
+    @Override
+    public void visitInnerClassType(final String name) {
+        endArguments();
+        stringBuilder.append('.');
+        stringBuilder.append(name);
+        // Pushes 'false' on the stack, meaning that this type does not have type arguments (as far as
+        // we can tell at this point).
+        argumentStack <<= 1;
+    }
+
+    @Override
+    public void visitTypeArgument() {
+        // If the top of the stack is 'false', this means we are visiting the first type argument of the
+        // currently visited type. We therefore need to append a '<', and to replace the top stack
+        // element with 'true' (meaning that the current type does have type arguments).
+        if ((argumentStack & 1) == 0) {
+            argumentStack |= 1;
+            stringBuilder.append('<');
+        }
+        stringBuilder.append('*');
+    }
+
+    @Override
+    public SignatureVisitor visitTypeArgument(final char wildcard) {
+        // If the top of the stack is 'false', this means we are visiting the first type argument of the
+        // currently visited type. We therefore need to append a '<', and to replace the top stack
+        // element with 'true' (meaning that the current type does have type arguments).
+        if ((argumentStack & 1) == 0) {
+            argumentStack |= 1;
+            stringBuilder.append('<');
+        }
+        if (wildcard != '=') {
+            stringBuilder.append(wildcard);
+        }
+        // If the stack is full, start a nested one by returning a new SignatureWriter.
+        return (argumentStack & (1 << 31)) == 0 ? this : new SignatureWriter(stringBuilder);
+    }
+
+    @Override
+    public void visitEnd() {
+        endArguments();
+        stringBuilder.append(';');
+    }
+
+    /**
+      * Returns the signature that was built by this signature writer.
+      *
+      * @return the signature that was built by this signature writer.
+      */
+    @Override
+    public String toString() {
+        return stringBuilder.toString();
+    }
+
+    // -----------------------------------------------------------------------------------------------
+    // Utility methods
+    // -----------------------------------------------------------------------------------------------
+
+    /** Ends the formal type parameters section of the signature. */
+    private void endFormals() {
+        if (hasFormals) {
+            hasFormals = false;
+            stringBuilder.append('>');
+        }
+    }
+
+    /** Ends the type arguments of a class or inner class type. */
+    private void endArguments() {
+        // If the top of the stack is 'true', this means that some type arguments have been visited for
+        // the type whose visit is now ending. We therefore need to append a '>', and to pop one element
+        // from the stack.
+        if ((argumentStack & 1) == 1) {
+            stringBuilder.append('>');
+        }
+        argumentStack >>>= 1;
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/org/objectweb/asm/tree/AbstractInsnNode.class b/tests/test_data/std/jdk/internal/org/objectweb/asm/tree/AbstractInsnNode.class
new file mode 100644
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HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/org/objectweb/asm/tree/AbstractInsnNode.java b/tests/test_data/std/jdk/internal/org/objectweb/asm/tree/AbstractInsnNode.java
new file mode 100644
index 00000000..1b22e023
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/org/objectweb/asm/tree/AbstractInsnNode.java
@@ -0,0 +1,301 @@
+/*
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/*
+ * This file is available under and governed by the GNU General Public
+ * License version 2 only, as published by the Free Software Foundation.
+ * However, the following notice accompanied the original version of this
+ * file:
+ *
+ * ASM: a very small and fast Java bytecode manipulation framework
+ * Copyright (c) 2000-2011 INRIA, France Telecom
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the copyright holders nor the names of its
+ *    contributors may be used to endorse or promote products derived from
+ *    this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+package jdk.internal.org.objectweb.asm.tree;
+
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Map;
+import jdk.internal.org.objectweb.asm.MethodVisitor;
+
+/**
+ * A node that represents a bytecode instruction. <i>An instruction can appear at most once in at
+ * most one {@link InsnList} at a time</i>.
+ *
+ * @author Eric Bruneton
+ */
+public abstract class AbstractInsnNode {
+
+    /** The type of {@link InsnNode} instructions. */
+    public static final int INSN = 0;
+
+    /** The type of {@link IntInsnNode} instructions. */
+    public static final int INT_INSN = 1;
+
+    /** The type of {@link VarInsnNode} instructions. */
+    public static final int VAR_INSN = 2;
+
+    /** The type of {@link TypeInsnNode} instructions. */
+    public static final int TYPE_INSN = 3;
+
+    /** The type of {@link FieldInsnNode} instructions. */
+    public static final int FIELD_INSN = 4;
+
+    /** The type of {@link MethodInsnNode} instructions. */
+    public static final int METHOD_INSN = 5;
+
+    /** The type of {@link InvokeDynamicInsnNode} instructions. */
+    public static final int INVOKE_DYNAMIC_INSN = 6;
+
+    /** The type of {@link JumpInsnNode} instructions. */
+    public static final int JUMP_INSN = 7;
+
+    /** The type of {@link LabelNode} "instructions". */
+    public static final int LABEL = 8;
+
+    /** The type of {@link LdcInsnNode} instructions. */
+    public static final int LDC_INSN = 9;
+
+    /** The type of {@link IincInsnNode} instructions. */
+    public static final int IINC_INSN = 10;
+
+    /** The type of {@link TableSwitchInsnNode} instructions. */
+    public static final int TABLESWITCH_INSN = 11;
+
+    /** The type of {@link LookupSwitchInsnNode} instructions. */
+    public static final int LOOKUPSWITCH_INSN = 12;
+
+    /** The type of {@link MultiANewArrayInsnNode} instructions. */
+    public static final int MULTIANEWARRAY_INSN = 13;
+
+    /** The type of {@link FrameNode} "instructions". */
+    public static final int FRAME = 14;
+
+    /** The type of {@link LineNumberNode} "instructions". */
+    public static final int LINE = 15;
+
+    /**
+      * The opcode of this instruction, or -1 if this is not a JVM instruction (e.g. a label or a line
+      * number).
+      */
+    protected int opcode;
+
+    /**
+      * The runtime visible type annotations of this instruction. This field is only used for real
+      * instructions (i.e. not for labels, frames, or line number nodes). This list is a list of {@link
+      * TypeAnnotationNode} objects. May be {@literal null}.
+      */
+    public List<TypeAnnotationNode> visibleTypeAnnotations;
+
+    /**
+      * The runtime invisible type annotations of this instruction. This field is only used for real
+      * instructions (i.e. not for labels, frames, or line number nodes). This list is a list of {@link
+      * TypeAnnotationNode} objects. May be {@literal null}.
+      */
+    public List<TypeAnnotationNode> invisibleTypeAnnotations;
+
+    /** The previous instruction in the list to which this instruction belongs. */
+    AbstractInsnNode previousInsn;
+
+    /** The next instruction in the list to which this instruction belongs. */
+    AbstractInsnNode nextInsn;
+
+    /**
+      * The index of this instruction in the list to which it belongs. The value of this field is
+      * correct only when {@link InsnList#cache} is not null. A value of -1 indicates that this
+      * instruction does not belong to any {@link InsnList}.
+      */
+    int index;
+
+    /**
+      * Constructs a new {@link AbstractInsnNode}.
+      *
+      * @param opcode the opcode of the instruction to be constructed.
+      */
+    protected AbstractInsnNode(final int opcode) {
+        this.opcode = opcode;
+        this.index = -1;
+    }
+
+    /**
+      * Returns the opcode of this instruction.
+      *
+      * @return the opcode of this instruction, or -1 if this is not a JVM instruction (e.g. a label or
+      *     a line number).
+      */
+    public int getOpcode() {
+        return opcode;
+    }
+
+    /**
+      * Returns the type of this instruction.
+      *
+      * @return the type of this instruction, i.e. one the constants defined in this class.
+      */
+    public abstract int getType();
+
+    /**
+      * Returns the previous instruction in the list to which this instruction belongs, if any.
+      *
+      * @return the previous instruction in the list to which this instruction belongs, if any. May be
+      *     {@literal null}.
+      */
+    public AbstractInsnNode getPrevious() {
+        return previousInsn;
+    }
+
+    /**
+      * Returns the next instruction in the list to which this instruction belongs, if any.
+      *
+      * @return the next instruction in the list to which this instruction belongs, if any. May be
+      *     {@literal null}.
+      */
+    public AbstractInsnNode getNext() {
+        return nextInsn;
+    }
+
+    /**
+      * Makes the given method visitor visit this instruction.
+      *
+      * @param methodVisitor a method visitor.
+      */
+    public abstract void accept(MethodVisitor methodVisitor);
+
+    /**
+      * Makes the given visitor visit the annotations of this instruction.
+      *
+      * @param methodVisitor a method visitor.
+      */
+    protected final void acceptAnnotations(final MethodVisitor methodVisitor) {
+        if (visibleTypeAnnotations != null) {
+            for (int i = 0, n = visibleTypeAnnotations.size(); i < n; ++i) {
+                TypeAnnotationNode typeAnnotation = visibleTypeAnnotations.get(i);
+                typeAnnotation.accept(
+                        methodVisitor.visitInsnAnnotation(
+                                typeAnnotation.typeRef, typeAnnotation.typePath, typeAnnotation.desc, true));
+            }
+        }
+        if (invisibleTypeAnnotations != null) {
+            for (int i = 0, n = invisibleTypeAnnotations.size(); i < n; ++i) {
+                TypeAnnotationNode typeAnnotation = invisibleTypeAnnotations.get(i);
+                typeAnnotation.accept(
+                        methodVisitor.visitInsnAnnotation(
+                                typeAnnotation.typeRef, typeAnnotation.typePath, typeAnnotation.desc, false));
+            }
+        }
+    }
+
+    /**
+      * Returns a copy of this instruction.
+      *
+      * @param clonedLabels a map from LabelNodes to cloned LabelNodes.
+      * @return a copy of this instruction. The returned instruction does not belong to any {@link
+      *     InsnList}.
+      */
+    public abstract AbstractInsnNode clone(Map<LabelNode, LabelNode> clonedLabels);
+
+    /**
+      * Returns the clone of the given label.
+      *
+      * @param label a label.
+      * @param clonedLabels a map from LabelNodes to cloned LabelNodes.
+      * @return the clone of the given label.
+      */
+    static LabelNode clone(final LabelNode label, final Map<LabelNode, LabelNode> clonedLabels) {
+        return clonedLabels.get(label);
+    }
+
+    /**
+      * Returns the clones of the given labels.
+      *
+      * @param labels a list of labels.
+      * @param clonedLabels a map from LabelNodes to cloned LabelNodes.
+      * @return the clones of the given labels.
+      */
+    static LabelNode[] clone(
+            final List<LabelNode> labels, final Map<LabelNode, LabelNode> clonedLabels) {
+        LabelNode[] clones = new LabelNode[labels.size()];
+        for (int i = 0, n = clones.length; i < n; ++i) {
+            clones[i] = clonedLabels.get(labels.get(i));
+        }
+        return clones;
+    }
+
+    /**
+      * Clones the annotations of the given instruction into this instruction.
+      *
+      * @param insnNode the source instruction.
+      * @return this instruction.
+      */
+    protected final AbstractInsnNode cloneAnnotations(final AbstractInsnNode insnNode) {
+        if (insnNode.visibleTypeAnnotations != null) {
+            this.visibleTypeAnnotations = new ArrayList<>();
+            for (int i = 0, n = insnNode.visibleTypeAnnotations.size(); i < n; ++i) {
+                TypeAnnotationNode sourceAnnotation = insnNode.visibleTypeAnnotations.get(i);
+                TypeAnnotationNode cloneAnnotation =
+                        new TypeAnnotationNode(
+                                sourceAnnotation.typeRef, sourceAnnotation.typePath, sourceAnnotation.desc);
+                sourceAnnotation.accept(cloneAnnotation);
+                this.visibleTypeAnnotations.add(cloneAnnotation);
+            }
+        }
+        if (insnNode.invisibleTypeAnnotations != null) {
+            this.invisibleTypeAnnotations = new ArrayList<>();
+            for (int i = 0, n = insnNode.invisibleTypeAnnotations.size(); i < n; ++i) {
+                TypeAnnotationNode sourceAnnotation = insnNode.invisibleTypeAnnotations.get(i);
+                TypeAnnotationNode cloneAnnotation =
+                        new TypeAnnotationNode(
+                                sourceAnnotation.typeRef, sourceAnnotation.typePath, sourceAnnotation.desc);
+                sourceAnnotation.accept(cloneAnnotation);
+                this.invisibleTypeAnnotations.add(cloneAnnotation);
+            }
+        }
+        return this;
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/org/objectweb/asm/tree/AnnotationNode.class b/tests/test_data/std/jdk/internal/org/objectweb/asm/tree/AnnotationNode.class
new file mode 100644
index 0000000000000000000000000000000000000000..966f0346499145ced25df4576914b02e1b10a98c
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/org/objectweb/asm/tree/AnnotationNode.java b/tests/test_data/std/jdk/internal/org/objectweb/asm/tree/AnnotationNode.java
new file mode 100644
index 00000000..2ef0bcfb
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/org/objectweb/asm/tree/AnnotationNode.java
@@ -0,0 +1,262 @@
+/*
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/*
+ * This file is available under and governed by the GNU General Public
+ * License version 2 only, as published by the Free Software Foundation.
+ * However, the following notice accompanied the original version of this
+ * file:
+ *
+ * ASM: a very small and fast Java bytecode manipulation framework
+ * Copyright (c) 2000-2011 INRIA, France Telecom
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the copyright holders nor the names of its
+ *    contributors may be used to endorse or promote products derived from
+ *    this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+package jdk.internal.org.objectweb.asm.tree;
+
+import java.util.ArrayList;
+import java.util.List;
+import jdk.internal.org.objectweb.asm.AnnotationVisitor;
+import jdk.internal.org.objectweb.asm.Opcodes;
+
+/**
+ * A node that represents an annotation.
+ *
+ * @author Eric Bruneton
+ */
+public class AnnotationNode extends AnnotationVisitor {
+
+    /** The class descriptor of the annotation class. */
+    public String desc;
+
+    /**
+      * The name value pairs of this annotation. Each name value pair is stored as two consecutive
+      * elements in the list. The name is a {@link String}, and the value may be a {@link Byte}, {@link
+      * Boolean}, {@link Character}, {@link Short}, {@link Integer}, {@link Long}, {@link Float},
+      * {@link Double}, {@link String} or {@link jdk.internal.org.objectweb.asm.Type}, or a two elements String
+      * array (for enumeration values), an {@link AnnotationNode}, or a {@link List} of values of one
+      * of the preceding types. The list may be {@literal null} if there is no name value pair.
+      */
+    public List<Object> values;
+
+    /**
+      * Constructs a new {@link AnnotationNode}. <i>Subclasses must not use this constructor</i>.
+      * Instead, they must use the {@link #AnnotationNode(int, String)} version.
+      *
+      * @param descriptor the class descriptor of the annotation class.
+      * @throws IllegalStateException If a subclass calls this constructor.
+      */
+    public AnnotationNode(final String descriptor) {
+        this(/* latest api = */ Opcodes.ASM9, descriptor);
+        if (getClass() != AnnotationNode.class) {
+            throw new IllegalStateException();
+        }
+    }
+
+    /**
+      * Constructs a new {@link AnnotationNode}.
+      *
+      * @param api the ASM API version implemented by this visitor. Must be one of the {@code
+      *     ASM}<i>x</i> values in {@link Opcodes}.
+      * @param descriptor the class descriptor of the annotation class.
+      */
+    public AnnotationNode(final int api, final String descriptor) {
+        super(api);
+        this.desc = descriptor;
+    }
+
+    /**
+      * Constructs a new {@link AnnotationNode} to visit an array value.
+      *
+      * @param values where the visited values must be stored.
+      */
+    AnnotationNode(final List<Object> values) {
+        super(/* latest api = */ Opcodes.ASM9);
+        this.values = values;
+    }
+
+    // ------------------------------------------------------------------------
+    // Implementation of the AnnotationVisitor abstract class
+    // ------------------------------------------------------------------------
+
+    @Override
+    public void visit(final String name, final Object value) {
+        if (values == null) {
+            values = new ArrayList<>(this.desc != null ? 2 : 1);
+        }
+        if (this.desc != null) {
+            values.add(name);
+        }
+        if (value instanceof byte[]) {
+            values.add(Util.asArrayList((byte[]) value));
+        } else if (value instanceof boolean[]) {
+            values.add(Util.asArrayList((boolean[]) value));
+        } else if (value instanceof short[]) {
+            values.add(Util.asArrayList((short[]) value));
+        } else if (value instanceof char[]) {
+            values.add(Util.asArrayList((char[]) value));
+        } else if (value instanceof int[]) {
+            values.add(Util.asArrayList((int[]) value));
+        } else if (value instanceof long[]) {
+            values.add(Util.asArrayList((long[]) value));
+        } else if (value instanceof float[]) {
+            values.add(Util.asArrayList((float[]) value));
+        } else if (value instanceof double[]) {
+            values.add(Util.asArrayList((double[]) value));
+        } else {
+            values.add(value);
+        }
+    }
+
+    @Override
+    public void visitEnum(final String name, final String descriptor, final String value) {
+        if (values == null) {
+            values = new ArrayList<>(this.desc != null ? 2 : 1);
+        }
+        if (this.desc != null) {
+            values.add(name);
+        }
+        values.add(new String[] {descriptor, value});
+    }
+
+    @Override
+    public AnnotationVisitor visitAnnotation(final String name, final String descriptor) {
+        if (values == null) {
+            values = new ArrayList<>(this.desc != null ? 2 : 1);
+        }
+        if (this.desc != null) {
+            values.add(name);
+        }
+        AnnotationNode annotation = new AnnotationNode(descriptor);
+        values.add(annotation);
+        return annotation;
+    }
+
+    @Override
+    public AnnotationVisitor visitArray(final String name) {
+        if (values == null) {
+            values = new ArrayList<>(this.desc != null ? 2 : 1);
+        }
+        if (this.desc != null) {
+            values.add(name);
+        }
+        List<Object> array = new ArrayList<>();
+        values.add(array);
+        return new AnnotationNode(array);
+    }
+
+    @Override
+    public void visitEnd() {
+        // Nothing to do.
+    }
+
+    // ------------------------------------------------------------------------
+    // Accept methods
+    // ------------------------------------------------------------------------
+
+    /**
+      * Checks that this annotation node is compatible with the given ASM API version. This method
+      * checks that this node, and all its children recursively, do not contain elements that were
+      * introduced in more recent versions of the ASM API than the given version.
+      *
+      * @param api an ASM API version. Must be one of the {@code ASM}<i>x</i> values in {@link
+      *     Opcodes}.
+      */
+    public void check(final int api) {
+        // nothing to do
+    }
+
+    /**
+      * Makes the given visitor visit this annotation.
+      *
+      * @param annotationVisitor an annotation visitor. Maybe {@literal null}.
+      */
+    public void accept(final AnnotationVisitor annotationVisitor) {
+        if (annotationVisitor != null) {
+            if (values != null) {
+                for (int i = 0, n = values.size(); i < n; i += 2) {
+                    String name = (String) values.get(i);
+                    Object value = values.get(i + 1);
+                    accept(annotationVisitor, name, value);
+                }
+            }
+            annotationVisitor.visitEnd();
+        }
+    }
+
+    /**
+      * Makes the given visitor visit a given annotation value.
+      *
+      * @param annotationVisitor an annotation visitor. Maybe {@literal null}.
+      * @param name the value name.
+      * @param value the actual value.
+      */
+    static void accept(
+            final AnnotationVisitor annotationVisitor, final String name, final Object value) {
+        if (annotationVisitor != null) {
+            if (value instanceof String[]) {
+                String[] typeValue = (String[]) value;
+                annotationVisitor.visitEnum(name, typeValue[0], typeValue[1]);
+            } else if (value instanceof AnnotationNode) {
+                AnnotationNode annotationValue = (AnnotationNode) value;
+                annotationValue.accept(annotationVisitor.visitAnnotation(name, annotationValue.desc));
+            } else if (value instanceof List) {
+                AnnotationVisitor arrayAnnotationVisitor = annotationVisitor.visitArray(name);
+                if (arrayAnnotationVisitor != null) {
+                    List<?> arrayValue = (List<?>) value;
+                    for (int i = 0, n = arrayValue.size(); i < n; ++i) {
+                        accept(arrayAnnotationVisitor, null, arrayValue.get(i));
+                    }
+                    arrayAnnotationVisitor.visitEnd();
+                }
+            } else {
+                annotationVisitor.visit(name, value);
+            }
+        }
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/org/objectweb/asm/tree/ClassNode.class b/tests/test_data/std/jdk/internal/org/objectweb/asm/tree/ClassNode.class
new file mode 100644
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diff --git a/tests/test_data/std/jdk/internal/org/objectweb/asm/tree/ClassNode.java b/tests/test_data/std/jdk/internal/org/objectweb/asm/tree/ClassNode.java
new file mode 100644
index 00000000..0e271d6a
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/org/objectweb/asm/tree/ClassNode.java
@@ -0,0 +1,504 @@
+/*
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/*
+ * This file is available under and governed by the GNU General Public
+ * License version 2 only, as published by the Free Software Foundation.
+ * However, the following notice accompanied the original version of this
+ * file:
+ *
+ * ASM: a very small and fast Java bytecode manipulation framework
+ * Copyright (c) 2000-2011 INRIA, France Telecom
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the copyright holders nor the names of its
+ *    contributors may be used to endorse or promote products derived from
+ *    this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+package jdk.internal.org.objectweb.asm.tree;
+
+import java.util.ArrayList;
+import java.util.List;
+import jdk.internal.org.objectweb.asm.AnnotationVisitor;
+import jdk.internal.org.objectweb.asm.Attribute;
+import jdk.internal.org.objectweb.asm.ClassVisitor;
+import jdk.internal.org.objectweb.asm.FieldVisitor;
+import jdk.internal.org.objectweb.asm.MethodVisitor;
+import jdk.internal.org.objectweb.asm.ModuleVisitor;
+import jdk.internal.org.objectweb.asm.Opcodes;
+import jdk.internal.org.objectweb.asm.RecordComponentVisitor;
+import jdk.internal.org.objectweb.asm.TypePath;
+
+/**
+ * A node that represents a class.
+ *
+ * @author Eric Bruneton
+ */
+public class ClassNode extends ClassVisitor {
+
+    /**
+      * The class version. The minor version is stored in the 16 most significant bits, and the major
+      * version in the 16 least significant bits.
+      */
+    public int version;
+
+    /**
+      * The class's access flags (see {@link jdk.internal.org.objectweb.asm.Opcodes}). This field also indicates if
+      * the class is deprecated {@link Opcodes#ACC_DEPRECATED} or a record {@link Opcodes#ACC_RECORD}.
+      */
+    public int access;
+
+    /** The internal name of this class (see {@link jdk.internal.org.objectweb.asm.Type#getInternalName()}). */
+    public String name;
+
+    /** The signature of this class. May be {@literal null}. */
+    public String signature;
+
+    /**
+      * The internal of name of the super class (see {@link jdk.internal.org.objectweb.asm.Type#getInternalName()}).
+      * For interfaces, the super class is {@link Object}. May be {@literal null}, but only for the
+      * {@link Object} class.
+      */
+    public String superName;
+
+    /**
+      * The internal names of the interfaces directly implemented by this class (see {@link
+      * jdk.internal.org.objectweb.asm.Type#getInternalName()}).
+      */
+    public List<String> interfaces;
+
+    /** The name of the source file from which this class was compiled. May be {@literal null}. */
+    public String sourceFile;
+
+    /**
+      * The correspondence between source and compiled elements of this class. May be {@literal null}.
+      */
+    public String sourceDebug;
+
+    /** The module stored in this class. May be {@literal null}. */
+    public ModuleNode module;
+
+    /**
+      * The internal name of the enclosing class of this class (see {@link
+      * jdk.internal.org.objectweb.asm.Type#getInternalName()}). Must be {@literal null} if this class has no
+      * enclosing class, or if it is a local or anonymous class.
+      */
+    public String outerClass;
+
+    /**
+      * The name of the method that contains the class, or {@literal null} if the class has no
+      * enclosing class, or is not enclosed in a method or constructor of its enclosing class (e.g. if
+      * it is enclosed in an instance initializer, static initializer, instance variable initializer,
+      * or class variable initializer).
+      */
+    public String outerMethod;
+
+    /**
+      * The descriptor of the method that contains the class, or {@literal null} if the class has no
+      * enclosing class, or is not enclosed in a method or constructor of its enclosing class (e.g. if
+      * it is enclosed in an instance initializer, static initializer, instance variable initializer,
+      * or class variable initializer).
+      */
+    public String outerMethodDesc;
+
+    /** The runtime visible annotations of this class. May be {@literal null}. */
+    public List<AnnotationNode> visibleAnnotations;
+
+    /** The runtime invisible annotations of this class. May be {@literal null}. */
+    public List<AnnotationNode> invisibleAnnotations;
+
+    /** The runtime visible type annotations of this class. May be {@literal null}. */
+    public List<TypeAnnotationNode> visibleTypeAnnotations;
+
+    /** The runtime invisible type annotations of this class. May be {@literal null}. */
+    public List<TypeAnnotationNode> invisibleTypeAnnotations;
+
+    /** The non standard attributes of this class. May be {@literal null}. */
+    public List<Attribute> attrs;
+
+    /** The inner classes of this class. */
+    public List<InnerClassNode> innerClasses;
+
+    /**
+      * The internal name of the nest host class of this class (see {@link
+      * jdk.internal.org.objectweb.asm.Type#getInternalName()}). May be {@literal null}.
+      */
+    public String nestHostClass;
+
+    /**
+      * The internal names of the nest members of this class (see {@link
+      * jdk.internal.org.objectweb.asm.Type#getInternalName()}). May be {@literal null}.
+      */
+    public List<String> nestMembers;
+
+    /**
+      * The internal names of the permitted subclasses of this class (see {@link
+      * jdk.internal.org.objectweb.asm.Type#getInternalName()}). May be {@literal null}.
+      */
+    public List<String> permittedSubclasses;
+
+    /** The record components of this class. May be {@literal null}. */
+    public List<RecordComponentNode> recordComponents;
+
+    /** The fields of this class. */
+    public List<FieldNode> fields;
+
+    /** The methods of this class. */
+    public List<MethodNode> methods;
+
+    /**
+      * Constructs a new {@link ClassNode}. <i>Subclasses must not use this constructor</i>. Instead,
+      * they must use the {@link #ClassNode(int)} version.
+      *
+      * @throws IllegalStateException If a subclass calls this constructor.
+      */
+    public ClassNode() {
+        this(Opcodes.ASM9);
+        if (getClass() != ClassNode.class) {
+            throw new IllegalStateException();
+        }
+    }
+
+    /**
+      * Constructs a new {@link ClassNode}.
+      *
+      * @param api the ASM API version implemented by this visitor. Must be one of the {@code
+      *     ASM}<i>x</i> values in {@link Opcodes}.
+      */
+    public ClassNode(final int api) {
+        super(api);
+        this.interfaces = new ArrayList<>();
+        this.innerClasses = new ArrayList<>();
+        this.fields = new ArrayList<>();
+        this.methods = new ArrayList<>();
+    }
+
+    // -----------------------------------------------------------------------------------------------
+    // Implementation of the ClassVisitor abstract class
+    // -----------------------------------------------------------------------------------------------
+
+    @Override
+    public void visit(
+            final int version,
+            final int access,
+            final String name,
+            final String signature,
+            final String superName,
+            final String[] interfaces) {
+        this.version = version;
+        this.access = access;
+        this.name = name;
+        this.signature = signature;
+        this.superName = superName;
+        this.interfaces = Util.asArrayList(interfaces);
+    }
+
+    @Override
+    public void visitSource(final String file, final String debug) {
+        sourceFile = file;
+        sourceDebug = debug;
+    }
+
+    @Override
+    public ModuleVisitor visitModule(final String name, final int access, final String version) {
+        module = new ModuleNode(name, access, version);
+        return module;
+    }
+
+    @Override
+    public void visitNestHost(final String nestHost) {
+        this.nestHostClass = nestHost;
+    }
+
+    @Override
+    public void visitOuterClass(final String owner, final String name, final String descriptor) {
+        outerClass = owner;
+        outerMethod = name;
+        outerMethodDesc = descriptor;
+    }
+
+    @Override
+    public AnnotationVisitor visitAnnotation(final String descriptor, final boolean visible) {
+        AnnotationNode annotation = new AnnotationNode(descriptor);
+        if (visible) {
+            visibleAnnotations = Util.add(visibleAnnotations, annotation);
+        } else {
+            invisibleAnnotations = Util.add(invisibleAnnotations, annotation);
+        }
+        return annotation;
+    }
+
+    @Override
+    public AnnotationVisitor visitTypeAnnotation(
+            final int typeRef, final TypePath typePath, final String descriptor, final boolean visible) {
+        TypeAnnotationNode typeAnnotation = new TypeAnnotationNode(typeRef, typePath, descriptor);
+        if (visible) {
+            visibleTypeAnnotations = Util.add(visibleTypeAnnotations, typeAnnotation);
+        } else {
+            invisibleTypeAnnotations = Util.add(invisibleTypeAnnotations, typeAnnotation);
+        }
+        return typeAnnotation;
+    }
+
+    @Override
+    public void visitAttribute(final Attribute attribute) {
+        attrs = Util.add(attrs, attribute);
+    }
+
+    @Override
+    public void visitNestMember(final String nestMember) {
+        nestMembers = Util.add(nestMembers, nestMember);
+    }
+
+    @Override
+    public void visitPermittedSubclass(final String permittedSubclass) {
+        permittedSubclasses = Util.add(permittedSubclasses, permittedSubclass);
+    }
+
+    @Override
+    public void visitInnerClass(
+            final String name, final String outerName, final String innerName, final int access) {
+        InnerClassNode innerClass = new InnerClassNode(name, outerName, innerName, access);
+        innerClasses.add(innerClass);
+    }
+
+    @Override
+    public RecordComponentVisitor visitRecordComponent(
+            final String name, final String descriptor, final String signature) {
+        RecordComponentNode recordComponent = new RecordComponentNode(name, descriptor, signature);
+        recordComponents = Util.add(recordComponents, recordComponent);
+        return recordComponent;
+    }
+
+    @Override
+    public FieldVisitor visitField(
+            final int access,
+            final String name,
+            final String descriptor,
+            final String signature,
+            final Object value) {
+        FieldNode field = new FieldNode(access, name, descriptor, signature, value);
+        fields.add(field);
+        return field;
+    }
+
+    @Override
+    public MethodVisitor visitMethod(
+            final int access,
+            final String name,
+            final String descriptor,
+            final String signature,
+            final String[] exceptions) {
+        MethodNode method = new MethodNode(access, name, descriptor, signature, exceptions);
+        methods.add(method);
+        return method;
+    }
+
+    @Override
+    public void visitEnd() {
+        // Nothing to do.
+    }
+
+    // -----------------------------------------------------------------------------------------------
+    // Accept method
+    // -----------------------------------------------------------------------------------------------
+
+    /**
+      * Checks that this class node is compatible with the given ASM API version. This method checks
+      * that this node, and all its children recursively, do not contain elements that were introduced
+      * in more recent versions of the ASM API than the given version.
+      *
+      * @param api an ASM API version. Must be one of the {@code ASM}<i>x</i> values in {@link
+      *     Opcodes}.
+      */
+    public void check(final int api) {
+        if (api < Opcodes.ASM9 && permittedSubclasses != null) {
+            throw new UnsupportedClassVersionException();
+        }
+        if (api < Opcodes.ASM8 && ((access & Opcodes.ACC_RECORD) != 0 || recordComponents != null)) {
+            throw new UnsupportedClassVersionException();
+        }
+        if (api < Opcodes.ASM7 && (nestHostClass != null || nestMembers != null)) {
+            throw new UnsupportedClassVersionException();
+        }
+        if (api < Opcodes.ASM6 && module != null) {
+            throw new UnsupportedClassVersionException();
+        }
+        if (api < Opcodes.ASM5) {
+            if (visibleTypeAnnotations != null && !visibleTypeAnnotations.isEmpty()) {
+                throw new UnsupportedClassVersionException();
+            }
+            if (invisibleTypeAnnotations != null && !invisibleTypeAnnotations.isEmpty()) {
+                throw new UnsupportedClassVersionException();
+            }
+        }
+        // Check the annotations.
+        if (visibleAnnotations != null) {
+            for (int i = visibleAnnotations.size() - 1; i >= 0; --i) {
+                visibleAnnotations.get(i).check(api);
+            }
+        }
+        if (invisibleAnnotations != null) {
+            for (int i = invisibleAnnotations.size() - 1; i >= 0; --i) {
+                invisibleAnnotations.get(i).check(api);
+            }
+        }
+        if (visibleTypeAnnotations != null) {
+            for (int i = visibleTypeAnnotations.size() - 1; i >= 0; --i) {
+                visibleTypeAnnotations.get(i).check(api);
+            }
+        }
+        if (invisibleTypeAnnotations != null) {
+            for (int i = invisibleTypeAnnotations.size() - 1; i >= 0; --i) {
+                invisibleTypeAnnotations.get(i).check(api);
+            }
+        }
+        if (recordComponents != null) {
+            for (int i = recordComponents.size() - 1; i >= 0; --i) {
+                recordComponents.get(i).check(api);
+            }
+        }
+        for (int i = fields.size() - 1; i >= 0; --i) {
+            fields.get(i).check(api);
+        }
+        for (int i = methods.size() - 1; i >= 0; --i) {
+            methods.get(i).check(api);
+        }
+    }
+
+    /**
+      * Makes the given class visitor visit this class.
+      *
+      * @param classVisitor a class visitor.
+      */
+    public void accept(final ClassVisitor classVisitor) {
+        // Visit the header.
+        String[] interfacesArray = new String[this.interfaces.size()];
+        this.interfaces.toArray(interfacesArray);
+        classVisitor.visit(version, access, name, signature, superName, interfacesArray);
+        // Visit the source.
+        if (sourceFile != null || sourceDebug != null) {
+            classVisitor.visitSource(sourceFile, sourceDebug);
+        }
+        // Visit the module.
+        if (module != null) {
+            module.accept(classVisitor);
+        }
+        // Visit the nest host class.
+        if (nestHostClass != null) {
+            classVisitor.visitNestHost(nestHostClass);
+        }
+        // Visit the outer class.
+        if (outerClass != null) {
+            classVisitor.visitOuterClass(outerClass, outerMethod, outerMethodDesc);
+        }
+        // Visit the annotations.
+        if (visibleAnnotations != null) {
+            for (int i = 0, n = visibleAnnotations.size(); i < n; ++i) {
+                AnnotationNode annotation = visibleAnnotations.get(i);
+                annotation.accept(classVisitor.visitAnnotation(annotation.desc, true));
+            }
+        }
+        if (invisibleAnnotations != null) {
+            for (int i = 0, n = invisibleAnnotations.size(); i < n; ++i) {
+                AnnotationNode annotation = invisibleAnnotations.get(i);
+                annotation.accept(classVisitor.visitAnnotation(annotation.desc, false));
+            }
+        }
+        if (visibleTypeAnnotations != null) {
+            for (int i = 0, n = visibleTypeAnnotations.size(); i < n; ++i) {
+                TypeAnnotationNode typeAnnotation = visibleTypeAnnotations.get(i);
+                typeAnnotation.accept(
+                        classVisitor.visitTypeAnnotation(
+                                typeAnnotation.typeRef, typeAnnotation.typePath, typeAnnotation.desc, true));
+            }
+        }
+        if (invisibleTypeAnnotations != null) {
+            for (int i = 0, n = invisibleTypeAnnotations.size(); i < n; ++i) {
+                TypeAnnotationNode typeAnnotation = invisibleTypeAnnotations.get(i);
+                typeAnnotation.accept(
+                        classVisitor.visitTypeAnnotation(
+                                typeAnnotation.typeRef, typeAnnotation.typePath, typeAnnotation.desc, false));
+            }
+        }
+        // Visit the non standard attributes.
+        if (attrs != null) {
+            for (int i = 0, n = attrs.size(); i < n; ++i) {
+                classVisitor.visitAttribute(attrs.get(i));
+            }
+        }
+        // Visit the nest members.
+        if (nestMembers != null) {
+            for (int i = 0, n = nestMembers.size(); i < n; ++i) {
+                classVisitor.visitNestMember(nestMembers.get(i));
+            }
+        }
+        // Visit the permitted subclasses.
+        if (permittedSubclasses != null) {
+            for (int i = 0, n = permittedSubclasses.size(); i < n; ++i) {
+                classVisitor.visitPermittedSubclass(permittedSubclasses.get(i));
+            }
+        }
+        // Visit the inner classes.
+        for (int i = 0, n = innerClasses.size(); i < n; ++i) {
+            innerClasses.get(i).accept(classVisitor);
+        }
+        // Visit the record components.
+        if (recordComponents != null) {
+            for (int i = 0, n = recordComponents.size(); i < n; ++i) {
+                recordComponents.get(i).accept(classVisitor);
+            }
+        }
+        // Visit the fields.
+        for (int i = 0, n = fields.size(); i < n; ++i) {
+            fields.get(i).accept(classVisitor);
+        }
+        // Visit the methods.
+        for (int i = 0, n = methods.size(); i < n; ++i) {
+            methods.get(i).accept(classVisitor);
+        }
+        classVisitor.visitEnd();
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/org/objectweb/asm/tree/FieldInsnNode.class b/tests/test_data/std/jdk/internal/org/objectweb/asm/tree/FieldInsnNode.class
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diff --git a/tests/test_data/std/jdk/internal/org/objectweb/asm/tree/FieldInsnNode.java b/tests/test_data/std/jdk/internal/org/objectweb/asm/tree/FieldInsnNode.java
new file mode 100644
index 00000000..ce450f91
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/org/objectweb/asm/tree/FieldInsnNode.java
@@ -0,0 +1,128 @@
+/*
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/*
+ * This file is available under and governed by the GNU General Public
+ * License version 2 only, as published by the Free Software Foundation.
+ * However, the following notice accompanied the original version of this
+ * file:
+ *
+ * ASM: a very small and fast Java bytecode manipulation framework
+ * Copyright (c) 2000-2011 INRIA, France Telecom
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the copyright holders nor the names of its
+ *    contributors may be used to endorse or promote products derived from
+ *    this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+package jdk.internal.org.objectweb.asm.tree;
+
+import java.util.Map;
+import jdk.internal.org.objectweb.asm.MethodVisitor;
+
+/**
+ * A node that represents a field instruction. A field instruction is an instruction that loads or
+ * stores the value of a field of an object.
+ *
+ * @author Eric Bruneton
+ */
+public class FieldInsnNode extends AbstractInsnNode {
+
+    /**
+      * The internal name of the field's owner class (see {@link
+      * jdk.internal.org.objectweb.asm.Type#getInternalName()}).
+      */
+    public String owner;
+
+    /** The field's name. */
+    public String name;
+
+    /** The field's descriptor (see {@link jdk.internal.org.objectweb.asm.Type}). */
+    public String desc;
+
+    /**
+      * Constructs a new {@link FieldInsnNode}.
+      *
+      * @param opcode the opcode of the type instruction to be constructed. This opcode must be
+      *     GETSTATIC, PUTSTATIC, GETFIELD or PUTFIELD.
+      * @param owner the internal name of the field's owner class (see {@link
+      *     jdk.internal.org.objectweb.asm.Type#getInternalName()}).
+      * @param name the field's name.
+      * @param descriptor the field's descriptor (see {@link jdk.internal.org.objectweb.asm.Type}).
+      */
+    public FieldInsnNode(
+            final int opcode, final String owner, final String name, final String descriptor) {
+        super(opcode);
+        this.owner = owner;
+        this.name = name;
+        this.desc = descriptor;
+    }
+
+    /**
+      * Sets the opcode of this instruction.
+      *
+      * @param opcode the new instruction opcode. This opcode must be GETSTATIC, PUTSTATIC, GETFIELD or
+      *     PUTFIELD.
+      */
+    public void setOpcode(final int opcode) {
+        this.opcode = opcode;
+    }
+
+    @Override
+    public int getType() {
+        return FIELD_INSN;
+    }
+
+    @Override
+    public void accept(final MethodVisitor methodVisitor) {
+        methodVisitor.visitFieldInsn(opcode, owner, name, desc);
+        acceptAnnotations(methodVisitor);
+    }
+
+    @Override
+    public AbstractInsnNode clone(final Map<LabelNode, LabelNode> clonedLabels) {
+        return new FieldInsnNode(opcode, owner, name, desc).cloneAnnotations(this);
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/org/objectweb/asm/tree/FieldNode.class b/tests/test_data/std/jdk/internal/org/objectweb/asm/tree/FieldNode.class
new file mode 100644
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GIT binary patch
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/org/objectweb/asm/tree/FieldNode.java b/tests/test_data/std/jdk/internal/org/objectweb/asm/tree/FieldNode.java
new file mode 100644
index 00000000..2bf3682b
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/org/objectweb/asm/tree/FieldNode.java
@@ -0,0 +1,276 @@
+/*
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/*
+ * This file is available under and governed by the GNU General Public
+ * License version 2 only, as published by the Free Software Foundation.
+ * However, the following notice accompanied the original version of this
+ * file:
+ *
+ * ASM: a very small and fast Java bytecode manipulation framework
+ * Copyright (c) 2000-2011 INRIA, France Telecom
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the copyright holders nor the names of its
+ *    contributors may be used to endorse or promote products derived from
+ *    this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+package jdk.internal.org.objectweb.asm.tree;
+
+import java.util.List;
+import jdk.internal.org.objectweb.asm.AnnotationVisitor;
+import jdk.internal.org.objectweb.asm.Attribute;
+import jdk.internal.org.objectweb.asm.ClassVisitor;
+import jdk.internal.org.objectweb.asm.FieldVisitor;
+import jdk.internal.org.objectweb.asm.Opcodes;
+import jdk.internal.org.objectweb.asm.TypePath;
+
+/**
+ * A node that represents a field.
+ *
+ * @author Eric Bruneton
+ */
+public class FieldNode extends FieldVisitor {
+
+    /**
+      * The field's access flags (see {@link jdk.internal.org.objectweb.asm.Opcodes}). This field also indicates if
+      * the field is synthetic and/or deprecated.
+      */
+    public int access;
+
+    /** The field's name. */
+    public String name;
+
+    /** The field's descriptor (see {@link jdk.internal.org.objectweb.asm.Type}). */
+    public String desc;
+
+    /** The field's signature. May be {@literal null}. */
+    public String signature;
+
+    /**
+      * The field's initial value. This field, which may be {@literal null} if the field does not have
+      * an initial value, must be an {@link Integer}, a {@link Float}, a {@link Long}, a {@link Double}
+      * or a {@link String}.
+      */
+    public Object value;
+
+    /** The runtime visible annotations of this field. May be {@literal null}. */
+    public List<AnnotationNode> visibleAnnotations;
+
+    /** The runtime invisible annotations of this field. May be {@literal null}. */
+    public List<AnnotationNode> invisibleAnnotations;
+
+    /** The runtime visible type annotations of this field. May be {@literal null}. */
+    public List<TypeAnnotationNode> visibleTypeAnnotations;
+
+    /** The runtime invisible type annotations of this field. May be {@literal null}. */
+    public List<TypeAnnotationNode> invisibleTypeAnnotations;
+
+    /** The non standard attributes of this field. * May be {@literal null}. */
+    public List<Attribute> attrs;
+
+    /**
+      * Constructs a new {@link FieldNode}. <i>Subclasses must not use this constructor</i>. Instead,
+      * they must use the {@link #FieldNode(int, int, String, String, String, Object)} version.
+      *
+      * @param access the field's access flags (see {@link jdk.internal.org.objectweb.asm.Opcodes}). This parameter
+      *     also indicates if the field is synthetic and/or deprecated.
+      * @param name the field's name.
+      * @param descriptor the field's descriptor (see {@link jdk.internal.org.objectweb.asm.Type}).
+      * @param signature the field's signature.
+      * @param value the field's initial value. This parameter, which may be {@literal null} if the
+      *     field does not have an initial value, must be an {@link Integer}, a {@link Float}, a {@link
+      *     Long}, a {@link Double} or a {@link String}.
+      * @throws IllegalStateException If a subclass calls this constructor.
+      */
+    public FieldNode(
+            final int access,
+            final String name,
+            final String descriptor,
+            final String signature,
+            final Object value) {
+        this(/* latest api = */ Opcodes.ASM9, access, name, descriptor, signature, value);
+        if (getClass() != FieldNode.class) {
+            throw new IllegalStateException();
+        }
+    }
+
+    /**
+      * Constructs a new {@link FieldNode}.
+      *
+      * @param api the ASM API version implemented by this visitor. Must be one of the {@code
+      *     ASM}<i>x</i> values in {@link Opcodes}.
+      * @param access the field's access flags (see {@link jdk.internal.org.objectweb.asm.Opcodes}). This parameter
+      *     also indicates if the field is synthetic and/or deprecated.
+      * @param name the field's name.
+      * @param descriptor the field's descriptor (see {@link jdk.internal.org.objectweb.asm.Type}).
+      * @param signature the field's signature.
+      * @param value the field's initial value. This parameter, which may be {@literal null} if the
+      *     field does not have an initial value, must be an {@link Integer}, a {@link Float}, a {@link
+      *     Long}, a {@link Double} or a {@link String}.
+      */
+    public FieldNode(
+            final int api,
+            final int access,
+            final String name,
+            final String descriptor,
+            final String signature,
+            final Object value) {
+        super(api);
+        this.access = access;
+        this.name = name;
+        this.desc = descriptor;
+        this.signature = signature;
+        this.value = value;
+    }
+
+    // -----------------------------------------------------------------------------------------------
+    // Implementation of the FieldVisitor abstract class
+    // -----------------------------------------------------------------------------------------------
+
+    @Override
+    public AnnotationVisitor visitAnnotation(final String descriptor, final boolean visible) {
+        AnnotationNode annotation = new AnnotationNode(descriptor);
+        if (visible) {
+            visibleAnnotations = Util.add(visibleAnnotations, annotation);
+        } else {
+            invisibleAnnotations = Util.add(invisibleAnnotations, annotation);
+        }
+        return annotation;
+    }
+
+    @Override
+    public AnnotationVisitor visitTypeAnnotation(
+            final int typeRef, final TypePath typePath, final String descriptor, final boolean visible) {
+        TypeAnnotationNode typeAnnotation = new TypeAnnotationNode(typeRef, typePath, descriptor);
+        if (visible) {
+            visibleTypeAnnotations = Util.add(visibleTypeAnnotations, typeAnnotation);
+        } else {
+            invisibleTypeAnnotations = Util.add(invisibleTypeAnnotations, typeAnnotation);
+        }
+        return typeAnnotation;
+    }
+
+    @Override
+    public void visitAttribute(final Attribute attribute) {
+        attrs = Util.add(attrs, attribute);
+    }
+
+    @Override
+    public void visitEnd() {
+        // Nothing to do.
+    }
+
+    // -----------------------------------------------------------------------------------------------
+    // Accept methods
+    // -----------------------------------------------------------------------------------------------
+
+    /**
+      * Checks that this field node is compatible with the given ASM API version. This method checks
+      * that this node, and all its children recursively, do not contain elements that were introduced
+      * in more recent versions of the ASM API than the given version.
+      *
+      * @param api an ASM API version. Must be one of the {@code ASM}<i>x</i> values in {@link
+      *     Opcodes}.
+      */
+    public void check(final int api) {
+        if (api == Opcodes.ASM4) {
+            if (visibleTypeAnnotations != null && !visibleTypeAnnotations.isEmpty()) {
+                throw new UnsupportedClassVersionException();
+            }
+            if (invisibleTypeAnnotations != null && !invisibleTypeAnnotations.isEmpty()) {
+                throw new UnsupportedClassVersionException();
+            }
+        }
+    }
+
+    /**
+      * Makes the given class visitor visit this field.
+      *
+      * @param classVisitor a class visitor.
+      */
+    public void accept(final ClassVisitor classVisitor) {
+        FieldVisitor fieldVisitor = classVisitor.visitField(access, name, desc, signature, value);
+        if (fieldVisitor == null) {
+            return;
+        }
+        // Visit the annotations.
+        if (visibleAnnotations != null) {
+            for (int i = 0, n = visibleAnnotations.size(); i < n; ++i) {
+                AnnotationNode annotation = visibleAnnotations.get(i);
+                annotation.accept(fieldVisitor.visitAnnotation(annotation.desc, true));
+            }
+        }
+        if (invisibleAnnotations != null) {
+            for (int i = 0, n = invisibleAnnotations.size(); i < n; ++i) {
+                AnnotationNode annotation = invisibleAnnotations.get(i);
+                annotation.accept(fieldVisitor.visitAnnotation(annotation.desc, false));
+            }
+        }
+        if (visibleTypeAnnotations != null) {
+            for (int i = 0, n = visibleTypeAnnotations.size(); i < n; ++i) {
+                TypeAnnotationNode typeAnnotation = visibleTypeAnnotations.get(i);
+                typeAnnotation.accept(
+                        fieldVisitor.visitTypeAnnotation(
+                                typeAnnotation.typeRef, typeAnnotation.typePath, typeAnnotation.desc, true));
+            }
+        }
+        if (invisibleTypeAnnotations != null) {
+            for (int i = 0, n = invisibleTypeAnnotations.size(); i < n; ++i) {
+                TypeAnnotationNode typeAnnotation = invisibleTypeAnnotations.get(i);
+                typeAnnotation.accept(
+                        fieldVisitor.visitTypeAnnotation(
+                                typeAnnotation.typeRef, typeAnnotation.typePath, typeAnnotation.desc, false));
+            }
+        }
+        // Visit the non standard attributes.
+        if (attrs != null) {
+            for (int i = 0, n = attrs.size(); i < n; ++i) {
+                fieldVisitor.visitAttribute(attrs.get(i));
+            }
+        }
+        fieldVisitor.visitEnd();
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/org/objectweb/asm/tree/FrameNode.class b/tests/test_data/std/jdk/internal/org/objectweb/asm/tree/FrameNode.class
new file mode 100644
index 0000000000000000000000000000000000000000..12d5ca2d9988fe8ed455305a856a406df267f9ef
GIT binary patch
literal 3420
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P?#;TohnM1Habe&e(Sbnn

literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/org/objectweb/asm/tree/FrameNode.java b/tests/test_data/std/jdk/internal/org/objectweb/asm/tree/FrameNode.java
new file mode 100644
index 00000000..cb8c8fb0
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/org/objectweb/asm/tree/FrameNode.java
@@ -0,0 +1,224 @@
+/*
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/*
+ * This file is available under and governed by the GNU General Public
+ * License version 2 only, as published by the Free Software Foundation.
+ * However, the following notice accompanied the original version of this
+ * file:
+ *
+ * ASM: a very small and fast Java bytecode manipulation framework
+ * Copyright (c) 2000-2011 INRIA, France Telecom
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the copyright holders nor the names of its
+ *    contributors may be used to endorse or promote products derived from
+ *    this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+package jdk.internal.org.objectweb.asm.tree;
+
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Map;
+import jdk.internal.org.objectweb.asm.MethodVisitor;
+import jdk.internal.org.objectweb.asm.Opcodes;
+
+/**
+ * A node that represents a stack map frame. These nodes are pseudo instruction nodes in order to be
+ * inserted in an instruction list. In fact these nodes must(*) be inserted <i>just before</i> any
+ * instruction node <b>i</b> that follows an unconditionnal branch instruction such as GOTO or
+ * THROW, that is the target of a jump instruction, or that starts an exception handler block. The
+ * stack map frame types must describe the values of the local variables and of the operand stack
+ * elements <i>just before</i> <b>i</b> is executed. <br>
+ * <br>
+ * (*) this is mandatory only for classes whose version is greater than or equal to {@link
+ * Opcodes#V1_6}.
+ *
+ * @author Eric Bruneton
+ */
+public class FrameNode extends AbstractInsnNode {
+
+    /**
+      * The type of this frame. Must be {@link Opcodes#F_NEW} for expanded frames, or {@link
+      * Opcodes#F_FULL}, {@link Opcodes#F_APPEND}, {@link Opcodes#F_CHOP}, {@link Opcodes#F_SAME} or
+      * {@link Opcodes#F_APPEND}, {@link Opcodes#F_SAME1} for compressed frames.
+      */
+    public int type;
+
+    /**
+      * The types of the local variables of this stack map frame. Elements of this list can be Integer,
+      * String or LabelNode objects (for primitive, reference and uninitialized types respectively -
+      * see {@link MethodVisitor}).
+      */
+    public List<Object> local;
+
+    /**
+      * The types of the operand stack elements of this stack map frame. Elements of this list can be
+      * Integer, String or LabelNode objects (for primitive, reference and uninitialized types
+      * respectively - see {@link MethodVisitor}).
+      */
+    public List<Object> stack;
+
+    private FrameNode() {
+        super(-1);
+    }
+
+    /**
+      * Constructs a new {@link FrameNode}.
+      *
+      * @param type the type of this frame. Must be {@link Opcodes#F_NEW} for expanded frames, or
+      *     {@link Opcodes#F_FULL}, {@link Opcodes#F_APPEND}, {@link Opcodes#F_CHOP}, {@link
+      *     Opcodes#F_SAME} or {@link Opcodes#F_APPEND}, {@link Opcodes#F_SAME1} for compressed frames.
+      * @param numLocal number of local variables of this stack map frame. Long and double values count
+      *     for one variable.
+      * @param local the types of the local variables of this stack map frame. Elements of this list
+      *     can be Integer, String or LabelNode objects (for primitive, reference and uninitialized
+      *     types respectively - see {@link MethodVisitor}). Long and double values are represented by
+      *     a single element.
+      * @param numStack number of operand stack elements of this stack map frame. Long and double
+      *     values count for one stack element.
+      * @param stack the types of the operand stack elements of this stack map frame. Elements of this
+      *     list can be Integer, String or LabelNode objects (for primitive, reference and
+      *     uninitialized types respectively - see {@link MethodVisitor}). Long and double values are
+      *     represented by a single element.
+      */
+    public FrameNode(
+            final int type,
+            final int numLocal,
+            final Object[] local,
+            final int numStack,
+            final Object[] stack) {
+        super(-1);
+        this.type = type;
+        switch (type) {
+            case Opcodes.F_NEW:
+            case Opcodes.F_FULL:
+                this.local = Util.asArrayList(numLocal, local);
+                this.stack = Util.asArrayList(numStack, stack);
+                break;
+            case Opcodes.F_APPEND:
+                this.local = Util.asArrayList(numLocal, local);
+                break;
+            case Opcodes.F_CHOP:
+                this.local = Util.asArrayList(numLocal);
+                break;
+            case Opcodes.F_SAME:
+                break;
+            case Opcodes.F_SAME1:
+                this.stack = Util.asArrayList(1, stack);
+                break;
+            default:
+                throw new IllegalArgumentException();
+        }
+    }
+
+    @Override
+    public int getType() {
+        return FRAME;
+    }
+
+    @Override
+    public void accept(final MethodVisitor methodVisitor) {
+        switch (type) {
+            case Opcodes.F_NEW:
+            case Opcodes.F_FULL:
+                methodVisitor.visitFrame(type, local.size(), asArray(local), stack.size(), asArray(stack));
+                break;
+            case Opcodes.F_APPEND:
+                methodVisitor.visitFrame(type, local.size(), asArray(local), 0, null);
+                break;
+            case Opcodes.F_CHOP:
+                methodVisitor.visitFrame(type, local.size(), null, 0, null);
+                break;
+            case Opcodes.F_SAME:
+                methodVisitor.visitFrame(type, 0, null, 0, null);
+                break;
+            case Opcodes.F_SAME1:
+                methodVisitor.visitFrame(type, 0, null, 1, asArray(stack));
+                break;
+            default:
+                throw new IllegalArgumentException();
+        }
+    }
+
+    @Override
+    public AbstractInsnNode clone(final Map<LabelNode, LabelNode> clonedLabels) {
+        FrameNode clone = new FrameNode();
+        clone.type = type;
+        if (local != null) {
+            clone.local = new ArrayList<>();
+            for (int i = 0, n = local.size(); i < n; ++i) {
+                Object localElement = local.get(i);
+                if (localElement instanceof LabelNode) {
+                    localElement = clonedLabels.get(localElement);
+                }
+                clone.local.add(localElement);
+            }
+        }
+        if (stack != null) {
+            clone.stack = new ArrayList<>();
+            for (int i = 0, n = stack.size(); i < n; ++i) {
+                Object stackElement = stack.get(i);
+                if (stackElement instanceof LabelNode) {
+                    stackElement = clonedLabels.get(stackElement);
+                }
+                clone.stack.add(stackElement);
+            }
+        }
+        return clone;
+    }
+
+    private static Object[] asArray(final List<Object> list) {
+        Object[] array = new Object[list.size()];
+        for (int i = 0, n = array.length; i < n; ++i) {
+            Object o = list.get(i);
+            if (o instanceof LabelNode) {
+                o = ((LabelNode) o).getLabel();
+            }
+            array[i] = o;
+        }
+        return array;
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/org/objectweb/asm/tree/IincInsnNode.class b/tests/test_data/std/jdk/internal/org/objectweb/asm/tree/IincInsnNode.class
new file mode 100644
index 0000000000000000000000000000000000000000..da1f57ebb0ef1bdbb32401b1baf93caff470ae61
GIT binary patch
literal 1630
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z#Tzd);Um$+AK;HNo|zVD2}yy(o1NJ+XP)=WduI3dpC7*ftl?P_F^0+A@_Q$cN<@-Z
zoG{vULT^|2>VxncUfXkCR{gLnY8DdcN}}6F5<Luy9d@Zm2xrx+sfhc^l{Hx;2t)UB
zAOp3+kjT2ZQZFoAOTxC%hkk~+i!j|l`lr13K93lft4RYk(i)SXjL5=uWRkdHV+g|x
z(;d+3LhXd*Qcw$2NWi{*Jv)(N=*qfOu0<lZY~02OLz?@(sH#;dL&a4P${NFbws0Al
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zgg&p7cogXOW-y_40y1FXLTV?r>Kn1d&_gYBWm$Y=NNx+Y`Kd}O@odhe+tM(Z`mxvE
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z*}?;gk2iMWAtvcf=RG0?W@cJTYiE&bD$UTS*Wv@#R~ll_=x!5wXK;37xrt-QV}v5Q
z$RY{FXdIl%A5e7%NF7nZQ%AUYT4cW|#-jp#DzI#bLycW61x{g_m<%(Rr8UidLx<Ds
z%uiTbC-`HG=8tgq8^z--b?&rKGykX=IG7{mJY_e|pd$+uc}$TQ7HRgx%%1)QuUe^E

literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/org/objectweb/asm/tree/IincInsnNode.java b/tests/test_data/std/jdk/internal/org/objectweb/asm/tree/IincInsnNode.java
new file mode 100644
index 00000000..864d540c
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/org/objectweb/asm/tree/IincInsnNode.java
@@ -0,0 +1,106 @@
+/*
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/*
+ * This file is available under and governed by the GNU General Public
+ * License version 2 only, as published by the Free Software Foundation.
+ * However, the following notice accompanied the original version of this
+ * file:
+ *
+ * ASM: a very small and fast Java bytecode manipulation framework
+ * Copyright (c) 2000-2011 INRIA, France Telecom
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the copyright holders nor the names of its
+ *    contributors may be used to endorse or promote products derived from
+ *    this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+package jdk.internal.org.objectweb.asm.tree;
+
+import java.util.Map;
+import jdk.internal.org.objectweb.asm.MethodVisitor;
+import jdk.internal.org.objectweb.asm.Opcodes;
+
+/**
+ * A node that represents an IINC instruction.
+ *
+ * @author Eric Bruneton
+ */
+public class IincInsnNode extends AbstractInsnNode {
+
+    /** Index of the local variable to be incremented. */
+    public int var;
+
+    /** Amount to increment the local variable by. */
+    public int incr;
+
+    /**
+      * Constructs a new {@link IincInsnNode}.
+      *
+      * @param varIndex index of the local variable to be incremented.
+      * @param incr increment amount to increment the local variable by.
+      */
+    public IincInsnNode(final int varIndex, final int incr) {
+        super(Opcodes.IINC);
+        this.var = varIndex;
+        this.incr = incr;
+    }
+
+    @Override
+    public int getType() {
+        return IINC_INSN;
+    }
+
+    @Override
+    public void accept(final MethodVisitor methodVisitor) {
+        methodVisitor.visitIincInsn(var, incr);
+        acceptAnnotations(methodVisitor);
+    }
+
+    @Override
+    public AbstractInsnNode clone(final Map<LabelNode, LabelNode> clonedLabels) {
+        return new IincInsnNode(var, incr).cloneAnnotations(this);
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/org/objectweb/asm/tree/InnerClassNode.class b/tests/test_data/std/jdk/internal/org/objectweb/asm/tree/InnerClassNode.class
new file mode 100644
index 0000000000000000000000000000000000000000..9066c3326d056e25ed8d055f30a7304dc5ca5617
GIT binary patch
literal 909
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zH1WYdz(2}3v&CYfv3d`?GqbZZpPAYF_WjFO039?d$RS^X=c9n4!0K3@$S{^>6uugc
zRg?)7pJ}7B=K}fW&Y+A7D3?(2aS^`2lkwr}P@7CyBjYf!qcCx|-l}0J(@B_FrNXW;
z%64Lzrv2nl33x_MXj|(obM0qVn^BviulT5P=yEcpuzhl6>t!En&Z;@sPwTpmIyMMV
zMv+QW0nx4CDmF`K__&5Gfz~;I4r`!Ooh4SFdcx9@SKw*$cglaUbaw_+XvfuC?P;U>
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z{jUH5mHlLDBlSXaX|-kdc-oJ6#<)!r%+Y)EAo$&oM7>_@G*+k6AZgFhNda55UMKAX
z=>^&w!Don|HAg9UILD=6caGJd?#)sA=<eKL9~5bgDaQn57_1;c4aeBT8{DLmz0*jz
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/org/objectweb/asm/tree/InnerClassNode.java b/tests/test_data/std/jdk/internal/org/objectweb/asm/tree/InnerClassNode.java
new file mode 100644
index 00000000..a2e103ae
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/org/objectweb/asm/tree/InnerClassNode.java
@@ -0,0 +1,123 @@
+/*
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/*
+ * This file is available under and governed by the GNU General Public
+ * License version 2 only, as published by the Free Software Foundation.
+ * However, the following notice accompanied the original version of this
+ * file:
+ *
+ * ASM: a very small and fast Java bytecode manipulation framework
+ * Copyright (c) 2000-2011 INRIA, France Telecom
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the copyright holders nor the names of its
+ *    contributors may be used to endorse or promote products derived from
+ *    this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+package jdk.internal.org.objectweb.asm.tree;
+
+import jdk.internal.org.objectweb.asm.ClassVisitor;
+
+/**
+ * A node that represents an inner class. This inner class is not necessarily a member of the {@link
+ * ClassNode} containing this object. More precisely, every class or interface C which is referenced
+ * by a {@link ClassNode} and which is not a package member must be represented with an {@link
+ * InnerClassNode}. The {@link ClassNode} must reference its nested class or interface members, and
+ * its enclosing class, if any. See the JVMS 4.7.6 section for more details.
+ *
+ * @author Eric Bruneton
+ */
+public class InnerClassNode {
+
+    /** The internal name of an inner class (see {@link jdk.internal.org.objectweb.asm.Type#getInternalName()}). */
+    public String name;
+
+    /**
+      * The internal name of the class to which the inner class belongs (see {@link
+      * jdk.internal.org.objectweb.asm.Type#getInternalName()}). May be {@literal null}.
+      */
+    public String outerName;
+
+    /**
+      * The (simple) name of the inner class inside its enclosing class. Must be {@literal null} if the
+      * inner class is not the member of a class or interface (e.g. for local or anonymous classes).
+      */
+    public String innerName;
+
+    /**
+      * The access flags of the inner class as originally declared in the source code from which the
+      * class was compiled.
+      */
+    public int access;
+
+    /**
+      * Constructs a new {@link InnerClassNode} for an inner class C.
+      *
+      * @param name the internal name of C (see {@link jdk.internal.org.objectweb.asm.Type#getInternalName()}).
+      * @param outerName the internal name of the class or interface C is a member of (see {@link
+      *     jdk.internal.org.objectweb.asm.Type#getInternalName()}). Must be {@literal null} if C is not the member
+      *     of a class or interface (e.g. for local or anonymous classes).
+      * @param innerName the (simple) name of C. Must be {@literal null} for anonymous inner classes.
+      * @param access the access flags of C originally declared in the source code from which this
+      *     class was compiled.
+      */
+    public InnerClassNode(
+            final String name, final String outerName, final String innerName, final int access) {
+        this.name = name;
+        this.outerName = outerName;
+        this.innerName = innerName;
+        this.access = access;
+    }
+
+    /**
+      * Makes the given class visitor visit this inner class.
+      *
+      * @param classVisitor a class visitor.
+      */
+    public void accept(final ClassVisitor classVisitor) {
+        classVisitor.visitInnerClass(name, outerName, innerName, access);
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/org/objectweb/asm/tree/InsnList$InsnListIterator.class b/tests/test_data/std/jdk/internal/org/objectweb/asm/tree/InsnList$InsnListIterator.class
new file mode 100644
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GIT binary patch
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HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/org/objectweb/asm/tree/InsnList.class b/tests/test_data/std/jdk/internal/org/objectweb/asm/tree/InsnList.class
new file mode 100644
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HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/org/objectweb/asm/tree/InsnList.java b/tests/test_data/std/jdk/internal/org/objectweb/asm/tree/InsnList.java
new file mode 100644
index 00000000..a63c80d7
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/org/objectweb/asm/tree/InsnList.java
@@ -0,0 +1,636 @@
+/*
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/*
+ * This file is available under and governed by the GNU General Public
+ * License version 2 only, as published by the Free Software Foundation.
+ * However, the following notice accompanied the original version of this
+ * file:
+ *
+ * ASM: a very small and fast Java bytecode manipulation framework
+ * Copyright (c) 2000-2011 INRIA, France Telecom
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the copyright holders nor the names of its
+ *    contributors may be used to endorse or promote products derived from
+ *    this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+package jdk.internal.org.objectweb.asm.tree;
+
+import java.util.ListIterator;
+import java.util.NoSuchElementException;
+import jdk.internal.org.objectweb.asm.MethodVisitor;
+
+/**
+ * A doubly linked list of {@link AbstractInsnNode} objects. <i>This implementation is not thread
+ * safe</i>.
+ */
+public class InsnList implements Iterable<AbstractInsnNode> {
+
+    /** The number of instructions in this list. */
+    private int size;
+
+    /** The first instruction in this list. May be {@literal null}. */
+    private AbstractInsnNode firstInsn;
+
+    /** The last instruction in this list. May be {@literal null}. */
+    private AbstractInsnNode lastInsn;
+
+    /**
+      * A cache of the instructions of this list. This cache is used to improve the performance of the
+      * {@link #get} method.
+      */
+    AbstractInsnNode[] cache;
+
+    /**
+      * Returns the number of instructions in this list.
+      *
+      * @return the number of instructions in this list.
+      */
+    public int size() {
+        return size;
+    }
+
+    /**
+      * Returns the first instruction in this list.
+      *
+      * @return the first instruction in this list, or {@literal null} if the list is empty.
+      */
+    public AbstractInsnNode getFirst() {
+        return firstInsn;
+    }
+
+    /**
+      * Returns the last instruction in this list.
+      *
+      * @return the last instruction in this list, or {@literal null} if the list is empty.
+      */
+    public AbstractInsnNode getLast() {
+        return lastInsn;
+    }
+
+    /**
+      * Returns the instruction whose index is given. This method builds a cache of the instructions in
+      * this list to avoid scanning the whole list each time it is called. Once the cache is built,
+      * this method runs in constant time. This cache is invalidated by all the methods that modify the
+      * list.
+      *
+      * @param index the index of the instruction that must be returned.
+      * @return the instruction whose index is given.
+      * @throws IndexOutOfBoundsException if (index &lt; 0 || index &gt;= size()).
+      */
+    public AbstractInsnNode get(final int index) {
+        if (index < 0 || index >= size) {
+            throw new IndexOutOfBoundsException();
+        }
+        if (cache == null) {
+            cache = toArray();
+        }
+        return cache[index];
+    }
+
+    /**
+      * Returns {@literal true} if the given instruction belongs to this list. This method always scans
+      * the instructions of this list until it finds the given instruction or reaches the end of the
+      * list.
+      *
+      * @param insnNode an instruction.
+      * @return {@literal true} if the given instruction belongs to this list.
+      */
+    public boolean contains(final AbstractInsnNode insnNode) {
+        AbstractInsnNode currentInsn = firstInsn;
+        while (currentInsn != null && currentInsn != insnNode) {
+            currentInsn = currentInsn.nextInsn;
+        }
+        return currentInsn != null;
+    }
+
+    /**
+      * Returns the index of the given instruction in this list. This method builds a cache of the
+      * instruction indexes to avoid scanning the whole list each time it is called. Once the cache is
+      * built, this method run in constant time. The cache is invalidated by all the methods that
+      * modify the list.
+      *
+      * @param insnNode an instruction <i>of this list</i>.
+      * @return the index of the given instruction in this list. <i>The result of this method is
+      *     undefined if the given instruction does not belong to this list</i>. Use {@link #contains }
+      *     to test if an instruction belongs to an instruction list or not.
+      */
+    public int indexOf(final AbstractInsnNode insnNode) {
+        if (cache == null) {
+            cache = toArray();
+        }
+        return insnNode.index;
+    }
+
+    /**
+      * Makes the given visitor visit all the instructions in this list.
+      *
+      * @param methodVisitor the method visitor that must visit the instructions.
+      */
+    public void accept(final MethodVisitor methodVisitor) {
+        AbstractInsnNode currentInsn = firstInsn;
+        while (currentInsn != null) {
+            currentInsn.accept(methodVisitor);
+            currentInsn = currentInsn.nextInsn;
+        }
+    }
+
+    /**
+      * Returns an iterator over the instructions in this list.
+      *
+      * @return an iterator over the instructions in this list.
+      */
+    @Override
+    public ListIterator<AbstractInsnNode> iterator() {
+        return iterator(0);
+    }
+
+    /**
+      * Returns an iterator over the instructions in this list.
+      *
+      * @param index index of instruction for the iterator to start at.
+      * @return an iterator over the instructions in this list.
+      */
+    @SuppressWarnings("unchecked")
+    public ListIterator<AbstractInsnNode> iterator(final int index) {
+        return new InsnListIterator(index);
+    }
+
+    /**
+      * Returns an array containing all the instructions in this list.
+      *
+      * @return an array containing all the instructions in this list.
+      */
+    public AbstractInsnNode[] toArray() {
+        int currentInsnIndex = 0;
+        AbstractInsnNode currentInsn = firstInsn;
+        AbstractInsnNode[] insnNodeArray = new AbstractInsnNode[size];
+        while (currentInsn != null) {
+            insnNodeArray[currentInsnIndex] = currentInsn;
+            currentInsn.index = currentInsnIndex++;
+            currentInsn = currentInsn.nextInsn;
+        }
+        return insnNodeArray;
+    }
+
+    /**
+      * Replaces an instruction of this list with another instruction.
+      *
+      * @param oldInsnNode an instruction <i>of this list</i>.
+      * @param newInsnNode another instruction, <i>which must not belong to any {@link InsnList}</i>.
+      */
+    public void set(final AbstractInsnNode oldInsnNode, final AbstractInsnNode newInsnNode) {
+        AbstractInsnNode nextInsn = oldInsnNode.nextInsn;
+        newInsnNode.nextInsn = nextInsn;
+        if (nextInsn != null) {
+            nextInsn.previousInsn = newInsnNode;
+        } else {
+            lastInsn = newInsnNode;
+        }
+        AbstractInsnNode previousInsn = oldInsnNode.previousInsn;
+        newInsnNode.previousInsn = previousInsn;
+        if (previousInsn != null) {
+            previousInsn.nextInsn = newInsnNode;
+        } else {
+            firstInsn = newInsnNode;
+        }
+        if (cache != null) {
+            int index = oldInsnNode.index;
+            cache[index] = newInsnNode;
+            newInsnNode.index = index;
+        } else {
+            newInsnNode.index = 0; // newInsnNode now belongs to an InsnList.
+        }
+        oldInsnNode.index = -1; // oldInsnNode no longer belongs to an InsnList.
+        oldInsnNode.previousInsn = null;
+        oldInsnNode.nextInsn = null;
+    }
+
+    /**
+      * Adds the given instruction to the end of this list.
+      *
+      * @param insnNode an instruction, <i>which must not belong to any {@link InsnList}</i>.
+      */
+    public void add(final AbstractInsnNode insnNode) {
+        ++size;
+        if (lastInsn == null) {
+            firstInsn = insnNode;
+            lastInsn = insnNode;
+        } else {
+            lastInsn.nextInsn = insnNode;
+            insnNode.previousInsn = lastInsn;
+        }
+        lastInsn = insnNode;
+        cache = null;
+        insnNode.index = 0; // insnNode now belongs to an InsnList.
+    }
+
+    /**
+      * Adds the given instructions to the end of this list.
+      *
+      * @param insnList an instruction list, which is cleared during the process. This list must be
+      *     different from 'this'.
+      */
+    public void add(final InsnList insnList) {
+        if (insnList.size == 0) {
+            return;
+        }
+        size += insnList.size;
+        if (lastInsn == null) {
+            firstInsn = insnList.firstInsn;
+            lastInsn = insnList.lastInsn;
+        } else {
+            AbstractInsnNode firstInsnListElement = insnList.firstInsn;
+            lastInsn.nextInsn = firstInsnListElement;
+            firstInsnListElement.previousInsn = lastInsn;
+            lastInsn = insnList.lastInsn;
+        }
+        cache = null;
+        insnList.removeAll(false);
+    }
+
+    /**
+      * Inserts the given instruction at the beginning of this list.
+      *
+      * @param insnNode an instruction, <i>which must not belong to any {@link InsnList}</i>.
+      */
+    public void insert(final AbstractInsnNode insnNode) {
+        ++size;
+        if (firstInsn == null) {
+            firstInsn = insnNode;
+            lastInsn = insnNode;
+        } else {
+            firstInsn.previousInsn = insnNode;
+            insnNode.nextInsn = firstInsn;
+        }
+        firstInsn = insnNode;
+        cache = null;
+        insnNode.index = 0; // insnNode now belongs to an InsnList.
+    }
+
+    /**
+      * Inserts the given instructions at the beginning of this list.
+      *
+      * @param insnList an instruction list, which is cleared during the process. This list must be
+      *     different from 'this'.
+      */
+    public void insert(final InsnList insnList) {
+        if (insnList.size == 0) {
+            return;
+        }
+        size += insnList.size;
+        if (firstInsn == null) {
+            firstInsn = insnList.firstInsn;
+            lastInsn = insnList.lastInsn;
+        } else {
+            AbstractInsnNode lastInsnListElement = insnList.lastInsn;
+            firstInsn.previousInsn = lastInsnListElement;
+            lastInsnListElement.nextInsn = firstInsn;
+            firstInsn = insnList.firstInsn;
+        }
+        cache = null;
+        insnList.removeAll(false);
+    }
+
+    /**
+      * Inserts the given instruction after the specified instruction.
+      *
+      * @param previousInsn an instruction <i>of this list</i> after which insnNode must be inserted.
+      * @param insnNode the instruction to be inserted, <i>which must not belong to any {@link
+      *     InsnList}</i>.
+      */
+    public void insert(final AbstractInsnNode previousInsn, final AbstractInsnNode insnNode) {
+        ++size;
+        AbstractInsnNode nextInsn = previousInsn.nextInsn;
+        if (nextInsn == null) {
+            lastInsn = insnNode;
+        } else {
+            nextInsn.previousInsn = insnNode;
+        }
+        previousInsn.nextInsn = insnNode;
+        insnNode.nextInsn = nextInsn;
+        insnNode.previousInsn = previousInsn;
+        cache = null;
+        insnNode.index = 0; // insnNode now belongs to an InsnList.
+    }
+
+    /**
+      * Inserts the given instructions after the specified instruction.
+      *
+      * @param previousInsn an instruction <i>of this list</i> after which the instructions must be
+      *     inserted.
+      * @param insnList the instruction list to be inserted, which is cleared during the process. This
+      *     list must be different from 'this'.
+      */
+    public void insert(final AbstractInsnNode previousInsn, final InsnList insnList) {
+        if (insnList.size == 0) {
+            return;
+        }
+        size += insnList.size;
+        AbstractInsnNode firstInsnListElement = insnList.firstInsn;
+        AbstractInsnNode lastInsnListElement = insnList.lastInsn;
+        AbstractInsnNode nextInsn = previousInsn.nextInsn;
+        if (nextInsn == null) {
+            lastInsn = lastInsnListElement;
+        } else {
+            nextInsn.previousInsn = lastInsnListElement;
+        }
+        previousInsn.nextInsn = firstInsnListElement;
+        lastInsnListElement.nextInsn = nextInsn;
+        firstInsnListElement.previousInsn = previousInsn;
+        cache = null;
+        insnList.removeAll(false);
+    }
+
+    /**
+      * Inserts the given instruction before the specified instruction.
+      *
+      * @param nextInsn an instruction <i>of this list</i> before which insnNode must be inserted.
+      * @param insnNode the instruction to be inserted, <i>which must not belong to any {@link
+      *     InsnList}</i>.
+      */
+    public void insertBefore(final AbstractInsnNode nextInsn, final AbstractInsnNode insnNode) {
+        ++size;
+        AbstractInsnNode previousInsn = nextInsn.previousInsn;
+        if (previousInsn == null) {
+            firstInsn = insnNode;
+        } else {
+            previousInsn.nextInsn = insnNode;
+        }
+        nextInsn.previousInsn = insnNode;
+        insnNode.nextInsn = nextInsn;
+        insnNode.previousInsn = previousInsn;
+        cache = null;
+        insnNode.index = 0; // insnNode now belongs to an InsnList.
+    }
+
+    /**
+      * Inserts the given instructions before the specified instruction.
+      *
+      * @param nextInsn an instruction <i>of this list</i> before which the instructions must be
+      *     inserted.
+      * @param insnList the instruction list to be inserted, which is cleared during the process. This
+      *     list must be different from 'this'.
+      */
+    public void insertBefore(final AbstractInsnNode nextInsn, final InsnList insnList) {
+        if (insnList.size == 0) {
+            return;
+        }
+        size += insnList.size;
+        AbstractInsnNode firstInsnListElement = insnList.firstInsn;
+        AbstractInsnNode lastInsnListElement = insnList.lastInsn;
+        AbstractInsnNode previousInsn = nextInsn.previousInsn;
+        if (previousInsn == null) {
+            firstInsn = firstInsnListElement;
+        } else {
+            previousInsn.nextInsn = firstInsnListElement;
+        }
+        nextInsn.previousInsn = lastInsnListElement;
+        lastInsnListElement.nextInsn = nextInsn;
+        firstInsnListElement.previousInsn = previousInsn;
+        cache = null;
+        insnList.removeAll(false);
+    }
+
+    /**
+      * Removes the given instruction from this list.
+      *
+      * @param insnNode the instruction <i>of this list</i> that must be removed.
+      */
+    public void remove(final AbstractInsnNode insnNode) {
+        --size;
+        AbstractInsnNode nextInsn = insnNode.nextInsn;
+        AbstractInsnNode previousInsn = insnNode.previousInsn;
+        if (nextInsn == null) {
+            if (previousInsn == null) {
+                firstInsn = null;
+                lastInsn = null;
+            } else {
+                previousInsn.nextInsn = null;
+                lastInsn = previousInsn;
+            }
+        } else {
+            if (previousInsn == null) {
+                firstInsn = nextInsn;
+                nextInsn.previousInsn = null;
+            } else {
+                previousInsn.nextInsn = nextInsn;
+                nextInsn.previousInsn = previousInsn;
+            }
+        }
+        cache = null;
+        insnNode.index = -1; // insnNode no longer belongs to an InsnList.
+        insnNode.previousInsn = null;
+        insnNode.nextInsn = null;
+    }
+
+    /**
+      * Removes all the instructions of this list.
+      *
+      * @param mark if the instructions must be marked as no longer belonging to any {@link InsnList}.
+      */
+    void removeAll(final boolean mark) {
+        if (mark) {
+            AbstractInsnNode currentInsn = firstInsn;
+            while (currentInsn != null) {
+                AbstractInsnNode next = currentInsn.nextInsn;
+                currentInsn.index = -1; // currentInsn no longer belongs to an InsnList.
+                currentInsn.previousInsn = null;
+                currentInsn.nextInsn = null;
+                currentInsn = next;
+            }
+        }
+        size = 0;
+        firstInsn = null;
+        lastInsn = null;
+        cache = null;
+    }
+
+    /** Removes all the instructions of this list. */
+    public void clear() {
+        removeAll(false);
+    }
+
+    /**
+      * Resets all the labels in the instruction list. This method should be called before reusing an
+      * instruction list between several <code>ClassWriter</code>s.
+      */
+    public void resetLabels() {
+        AbstractInsnNode currentInsn = firstInsn;
+        while (currentInsn != null) {
+            if (currentInsn instanceof LabelNode) {
+                ((LabelNode) currentInsn).resetLabel();
+            }
+            currentInsn = currentInsn.nextInsn;
+        }
+    }
+
+    // Note: this class is not generified because it would create bridges.
+    @SuppressWarnings("rawtypes")
+    private final class InsnListIterator implements ListIterator {
+
+        AbstractInsnNode nextInsn;
+
+        AbstractInsnNode previousInsn;
+
+        AbstractInsnNode remove;
+
+        InsnListIterator(final int index) {
+            if (index < 0 || index > size()) {
+                throw new IndexOutOfBoundsException();
+            } else if (index == size()) {
+                nextInsn = null;
+                previousInsn = getLast();
+            } else {
+                AbstractInsnNode currentInsn = getFirst();
+                for (int i = 0; i < index; i++) {
+                    currentInsn = currentInsn.nextInsn;
+                }
+
+                nextInsn = currentInsn;
+                previousInsn = currentInsn.previousInsn;
+            }
+        }
+
+        @Override
+        public boolean hasNext() {
+            return nextInsn != null;
+        }
+
+        @Override
+        public Object next() {
+            if (nextInsn == null) {
+                throw new NoSuchElementException();
+            }
+            AbstractInsnNode result = nextInsn;
+            previousInsn = result;
+            nextInsn = result.nextInsn;
+            remove = result;
+            return result;
+        }
+
+        @Override
+        public void remove() {
+            if (remove != null) {
+                if (remove == nextInsn) {
+                    nextInsn = nextInsn.nextInsn;
+                } else {
+                    previousInsn = previousInsn.previousInsn;
+                }
+                InsnList.this.remove(remove);
+                remove = null;
+            } else {
+                throw new IllegalStateException();
+            }
+        }
+
+        @Override
+        public boolean hasPrevious() {
+            return previousInsn != null;
+        }
+
+        @Override
+        public Object previous() {
+            if (previousInsn == null) {
+                throw new NoSuchElementException();
+            }
+            AbstractInsnNode result = previousInsn;
+            nextInsn = result;
+            previousInsn = result.previousInsn;
+            remove = result;
+            return result;
+        }
+
+        @Override
+        public int nextIndex() {
+            if (nextInsn == null) {
+                return size();
+            }
+            if (cache == null) {
+                cache = toArray();
+            }
+            return nextInsn.index;
+        }
+
+        @Override
+        public int previousIndex() {
+            if (previousInsn == null) {
+                return -1;
+            }
+            if (cache == null) {
+                cache = toArray();
+            }
+            return previousInsn.index;
+        }
+
+        @Override
+        public void add(final Object o) {
+            if (nextInsn != null) {
+                InsnList.this.insertBefore(nextInsn, (AbstractInsnNode) o);
+            } else if (previousInsn != null) {
+                InsnList.this.insert(previousInsn, (AbstractInsnNode) o);
+            } else {
+                InsnList.this.add((AbstractInsnNode) o);
+            }
+            previousInsn = (AbstractInsnNode) o;
+            remove = null;
+        }
+
+        @Override
+        public void set(final Object o) {
+            if (remove != null) {
+                InsnList.this.set(remove, (AbstractInsnNode) o);
+                if (remove == previousInsn) {
+                    previousInsn = (AbstractInsnNode) o;
+                } else {
+                    nextInsn = (AbstractInsnNode) o;
+                }
+            } else {
+                throw new IllegalStateException();
+            }
+        }
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/org/objectweb/asm/tree/InsnNode.class b/tests/test_data/std/jdk/internal/org/objectweb/asm/tree/InsnNode.class
new file mode 100644
index 0000000000000000000000000000000000000000..2fec018fea13b61635c20ee9b84be444780897f8
GIT binary patch
literal 1477
zcmcJPTWb?R6vzLQq)8JumsT4u^?uEzW)XZ#36z2oN&C_g6?~c94C&O(PS{K;ej;Cd
zP>>W9`~ZF^@yu>ov!#$&@MV}ed**lk=RdRa>-YDc0JdT0kU%nnl!Yav8J-{Z-rLgG
zBJjCqtDtWy=TNx%gK%s<8rV7z!rpR5I^eEu`y+o>^#ntDQ~FZ37*dsXwVTB<vKizo
zT!O{0u?Ta9rG{<@W$hdaC}vQyuwul`1MLWXpn6?7l3E1}*&{PE;2a6MY~c#l7*@FJ
zilN@}eWkgU${#U2t90gQjG>#=t|2DPaLvMX++ZlVp7KSE>d&Q~>t?e$Pt5t-$o%cl
zw_->7Vs|`nM6k~tkB(=xqg?KFc_7Vt8cgW}Nxe4~s&;ZbO@>Tg=>3mF!X_)#Hl2NB
zC_{b__kS)qZYsl4=pn;PGL9c{d#t5r@9^Qp9kD`UufrYTQLn`_T!wPo8ER|lj*6#l
zF62^J$NUk^e@t(Yuh~7>_qiSi<m{(24*d7>7rt}3Jv9zo@j{w=mOr^B4Re0DNB>8H
zo*5toI$fk`T&Gowq9&fMtsjGZrC9<uX*6#U@R~B;;1<owQ5J6F4y`EPyeGt9xJ&Ga
zwGpm~ko-&;5y#X4-h~X4Z{iVy;Xc-;J6}=M)GO3$-;kLgU#m~B`d3W>N&3pE2M2k$
zGl~kQiVApuhoOQ;cuX|YU6=M5Zs`Y>-x~BW%C!luexX=0>@(8WpCOh`i6uNig@{$k
Uj<lOdjUsi5Bw+e|8qOMj087+{&;S4c

literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/org/objectweb/asm/tree/InsnNode.java b/tests/test_data/std/jdk/internal/org/objectweb/asm/tree/InsnNode.java
new file mode 100644
index 00000000..94e043ca
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/org/objectweb/asm/tree/InsnNode.java
@@ -0,0 +1,105 @@
+/*
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/*
+ * This file is available under and governed by the GNU General Public
+ * License version 2 only, as published by the Free Software Foundation.
+ * However, the following notice accompanied the original version of this
+ * file:
+ *
+ * ASM: a very small and fast Java bytecode manipulation framework
+ * Copyright (c) 2000-2011 INRIA, France Telecom
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the copyright holders nor the names of its
+ *    contributors may be used to endorse or promote products derived from
+ *    this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+package jdk.internal.org.objectweb.asm.tree;
+
+import java.util.Map;
+import jdk.internal.org.objectweb.asm.MethodVisitor;
+
+/**
+ * A node that represents a zero operand instruction.
+ *
+ * @author Eric Bruneton
+ */
+public class InsnNode extends AbstractInsnNode {
+
+    /**
+      * Constructs a new {@link InsnNode}.
+      *
+      * @param opcode the opcode of the instruction to be constructed. This opcode must be NOP,
+      *     ACONST_NULL, ICONST_M1, ICONST_0, ICONST_1, ICONST_2, ICONST_3, ICONST_4, ICONST_5,
+      *     LCONST_0, LCONST_1, FCONST_0, FCONST_1, FCONST_2, DCONST_0, DCONST_1, IALOAD, LALOAD,
+      *     FALOAD, DALOAD, AALOAD, BALOAD, CALOAD, SALOAD, IASTORE, LASTORE, FASTORE, DASTORE,
+      *     AASTORE, BASTORE, CASTORE, SASTORE, POP, POP2, DUP, DUP_X1, DUP_X2, DUP2, DUP2_X1, DUP2_X2,
+      *     SWAP, IADD, LADD, FADD, DADD, ISUB, LSUB, FSUB, DSUB, IMUL, LMUL, FMUL, DMUL, IDIV, LDIV,
+      *     FDIV, DDIV, IREM, LREM, FREM, DREM, INEG, LNEG, FNEG, DNEG, ISHL, LSHL, ISHR, LSHR, IUSHR,
+      *     LUSHR, IAND, LAND, IOR, LOR, IXOR, LXOR, I2L, I2F, I2D, L2I, L2F, L2D, F2I, F2L, F2D, D2I,
+      *     D2L, D2F, I2B, I2C, I2S, LCMP, FCMPL, FCMPG, DCMPL, DCMPG, IRETURN, LRETURN, FRETURN,
+      *     DRETURN, ARETURN, RETURN, ARRAYLENGTH, ATHROW, MONITORENTER, or MONITOREXIT.
+      */
+    public InsnNode(final int opcode) {
+        super(opcode);
+    }
+
+    @Override
+    public int getType() {
+        return INSN;
+    }
+
+    @Override
+    public void accept(final MethodVisitor methodVisitor) {
+        methodVisitor.visitInsn(opcode);
+        acceptAnnotations(methodVisitor);
+    }
+
+    @Override
+    public AbstractInsnNode clone(final Map<LabelNode, LabelNode> clonedLabels) {
+        return new InsnNode(opcode).cloneAnnotations(this);
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/org/objectweb/asm/tree/IntInsnNode.class b/tests/test_data/std/jdk/internal/org/objectweb/asm/tree/IntInsnNode.class
new file mode 100644
index 0000000000000000000000000000000000000000..33154e1e854f38d670d177280f1d844969a3a6f9
GIT binary patch
literal 1645
zcmcJPT~8B16o%hf+AfqWAGM$eDt@;MvZ8oZLPAJ1O$x?<O*GMDb~`DH?QFB1V*Ewk
zc%g|vqKQAiA7wnVyFyDy3M5|a?wQ#$&wJ*ane+S4k6!>b@GJ`hLncxd(#SBZ?A1Rw
zzEmQVyy*mC!wK9y;i-?pb$F-cs89%J-R-E5d#WNkax16{hRmujeYM7rDppFh5e#F*
zMApJ6EC%O1%!=&6nL%5GT-F&_MZ?A{jB8RRXnUlW#U%13u2?8wieYg8e^aR4pkDJk
zz6wGHYhPQ59z(iVp^&qra@E2$%rH!H&l7F6E@hy&@&nmnST0sCqEe2DvpTC&ntj8<
zP26Ib@S1@XeP}rleP+_jr9ly$y^LzK5!GzG>PxZJZMh=c;ck<vn6CyNZ`OF|>v1xf
zQoFuRz`4|Vs#s<i=?L{Qsu+XW5NhXBn^cC1r3#fYPBKHT)nA^aK|+1yB$afOQid0l
zN50RUuJW7CCU0LpK~_YpSGg;iwDs{*T!!iXMA5dAWCi`MtAq9ul_=8D_o#e9_cfj4
zZNDM8>V}lr&!;l*-{miT1hd;gH}u4FUmv@Po>Q}=ONiTaV+`s~bpLe=AuCN5T_t+Y
z)996MTJ#;YXOF<_xdWKrXlT$vU@ZEzP3}9$;x+Ej+<fegySPUqTB!R8!L+3X46^Sd
zli=5AtmQNI>;ZBoWZf%)cSL?4QKw_CV`?U$GCaV;gtbUttz)FV=yw#M)&bmz5l3Mp
z42B|Rl9gK&v)0Qm*x!+($2`P@y>N)>lZfKIHfRUC)D!)lsPe~A<xzqiMX`WIBF+=@
zEm9G?@Dsyt{^5^s-9E(JSNcEH6KAW3S~#W_@CZvpb;vv3gPwUzGs`q%;0akzBWvX^
DG`pPT

literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/org/objectweb/asm/tree/IntInsnNode.java b/tests/test_data/std/jdk/internal/org/objectweb/asm/tree/IntInsnNode.java
new file mode 100644
index 00000000..0c044886
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/org/objectweb/asm/tree/IntInsnNode.java
@@ -0,0 +1,111 @@
+/*
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/*
+ * This file is available under and governed by the GNU General Public
+ * License version 2 only, as published by the Free Software Foundation.
+ * However, the following notice accompanied the original version of this
+ * file:
+ *
+ * ASM: a very small and fast Java bytecode manipulation framework
+ * Copyright (c) 2000-2011 INRIA, France Telecom
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the copyright holders nor the names of its
+ *    contributors may be used to endorse or promote products derived from
+ *    this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+package jdk.internal.org.objectweb.asm.tree;
+
+import java.util.Map;
+import jdk.internal.org.objectweb.asm.MethodVisitor;
+
+/**
+ * A node that represents an instruction with a single int operand.
+ *
+ * @author Eric Bruneton
+ */
+public class IntInsnNode extends AbstractInsnNode {
+
+    /** The operand of this instruction. */
+    public int operand;
+
+    /**
+      * Constructs a new {@link IntInsnNode}.
+      *
+      * @param opcode the opcode of the instruction to be constructed. This opcode must be BIPUSH,
+      *     SIPUSH or NEWARRAY.
+      * @param operand the operand of the instruction to be constructed.
+      */
+    public IntInsnNode(final int opcode, final int operand) {
+        super(opcode);
+        this.operand = operand;
+    }
+
+    /**
+      * Sets the opcode of this instruction.
+      *
+      * @param opcode the new instruction opcode. This opcode must be BIPUSH, SIPUSH or NEWARRAY.
+      */
+    public void setOpcode(final int opcode) {
+        this.opcode = opcode;
+    }
+
+    @Override
+    public int getType() {
+        return INT_INSN;
+    }
+
+    @Override
+    public void accept(final MethodVisitor methodVisitor) {
+        methodVisitor.visitIntInsn(opcode, operand);
+        acceptAnnotations(methodVisitor);
+    }
+
+    @Override
+    public AbstractInsnNode clone(final Map<LabelNode, LabelNode> clonedLabels) {
+        return new IntInsnNode(opcode, operand).cloneAnnotations(this);
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/org/objectweb/asm/tree/InvokeDynamicInsnNode.class b/tests/test_data/std/jdk/internal/org/objectweb/asm/tree/InvokeDynamicInsnNode.class
new file mode 100644
index 0000000000000000000000000000000000000000..a640915988177d74dd9a21d0f89ad254ff8b6660
GIT binary patch
literal 2000
zcmcIlTTc@~7(LULR_b!sDz%7r=yF*vc)=n{G%87z2TT*=)9iLE3+-&Ponr9K_+xzW
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zSaAY(U3lt^a2?*LIV*K9D2qlK3G}3pw2;CvhPf_ZsZa=K$!(~RdumxW<Z}XHNG|x&
zSBngZ$>n^h7ik<%!LrbYeunwOU@pteU_(6GlDy`7zkw4pC;Z{!I^X0@mCK5=szP5@
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z$SLTj5uNVVo9;m~r(4bJc&Cplt=lwvj~IIBJ!TK#>leiBsU7s%(>oZjXLc}bk0y4I
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pPqZF4<%)E_-G`prL(gFzcL}>dyQ7?RWPu|0C=$aWjqaP#gI`<}8}|SJ

literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/org/objectweb/asm/tree/InvokeDynamicInsnNode.java b/tests/test_data/std/jdk/internal/org/objectweb/asm/tree/InvokeDynamicInsnNode.java
new file mode 100644
index 00000000..087d3f5a
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/org/objectweb/asm/tree/InvokeDynamicInsnNode.java
@@ -0,0 +1,124 @@
+/*
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/*
+ * This file is available under and governed by the GNU General Public
+ * License version 2 only, as published by the Free Software Foundation.
+ * However, the following notice accompanied the original version of this
+ * file:
+ *
+ * ASM: a very small and fast Java bytecode manipulation framework
+ * Copyright (c) 2000-2011 INRIA, France Telecom
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the copyright holders nor the names of its
+ *    contributors may be used to endorse or promote products derived from
+ *    this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+package jdk.internal.org.objectweb.asm.tree;
+
+import java.util.Map;
+import jdk.internal.org.objectweb.asm.Handle;
+import jdk.internal.org.objectweb.asm.MethodVisitor;
+import jdk.internal.org.objectweb.asm.Opcodes;
+
+/**
+ * A node that represents an invokedynamic instruction.
+ *
+ * @author Remi Forax
+ */
+public class InvokeDynamicInsnNode extends AbstractInsnNode {
+
+    /** The method's name. */
+    public String name;
+
+    /** The method's descriptor (see {@link jdk.internal.org.objectweb.asm.Type}). */
+    public String desc;
+
+    /** The bootstrap method. */
+    public Handle bsm;
+
+    /** The bootstrap method constant arguments. */
+    public Object[] bsmArgs;
+
+    /**
+      * Constructs a new {@link InvokeDynamicInsnNode}.
+      *
+      * @param name the method's name.
+      * @param descriptor the method's descriptor (see {@link jdk.internal.org.objectweb.asm.Type}).
+      * @param bootstrapMethodHandle the bootstrap method.
+      * @param bootstrapMethodArguments the bootstrap method constant arguments. Each argument must be
+      *     an {@link Integer}, {@link Float}, {@link Long}, {@link Double}, {@link String}, {@link
+      *     jdk.internal.org.objectweb.asm.Type} or {@link Handle} value. This method is allowed to modify the
+      *     content of the array so a caller should expect that this array may change.
+      */
+    public InvokeDynamicInsnNode(
+            final String name,
+            final String descriptor,
+            final Handle bootstrapMethodHandle,
+            final Object... bootstrapMethodArguments) {
+        super(Opcodes.INVOKEDYNAMIC);
+        this.name = name;
+        this.desc = descriptor;
+        this.bsm = bootstrapMethodHandle;
+        this.bsmArgs = bootstrapMethodArguments; // NOPMD(ArrayIsStoredDirectly): public field.
+    }
+
+    @Override
+    public int getType() {
+        return INVOKE_DYNAMIC_INSN;
+    }
+
+    @Override
+    public void accept(final MethodVisitor methodVisitor) {
+        methodVisitor.visitInvokeDynamicInsn(name, desc, bsm, bsmArgs);
+        acceptAnnotations(methodVisitor);
+    }
+
+    @Override
+    public AbstractInsnNode clone(final Map<LabelNode, LabelNode> clonedLabels) {
+        return new InvokeDynamicInsnNode(name, desc, bsm, bsmArgs).cloneAnnotations(this);
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/org/objectweb/asm/tree/JumpInsnNode.class b/tests/test_data/std/jdk/internal/org/objectweb/asm/tree/JumpInsnNode.class
new file mode 100644
index 0000000000000000000000000000000000000000..5019e2680d9b3cb0a5019dac541ffbcb7b311719
GIT binary patch
literal 2035
zcmcIlYflqF6g|_@E|ldd#VS7V-EM&e@m;JE5=~9P7)TQ|G1+cc*xK&a?G)oL@{1od
zkzzFQ2l%6mcV=5kE6ElU({y(pch0@%+<SL^{r>(Fz#1OM5JFhNfQksB47bXqx4P|c
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mEEV;`Z5%;P93m%h5BCZ80a^Q0#7c%%R%j)JhcwE{(W5^xHzI@p

literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/org/objectweb/asm/tree/JumpInsnNode.java b/tests/test_data/std/jdk/internal/org/objectweb/asm/tree/JumpInsnNode.java
new file mode 100644
index 00000000..23891297
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/org/objectweb/asm/tree/JumpInsnNode.java
@@ -0,0 +1,119 @@
+/*
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/*
+ * This file is available under and governed by the GNU General Public
+ * License version 2 only, as published by the Free Software Foundation.
+ * However, the following notice accompanied the original version of this
+ * file:
+ *
+ * ASM: a very small and fast Java bytecode manipulation framework
+ * Copyright (c) 2000-2011 INRIA, France Telecom
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the copyright holders nor the names of its
+ *    contributors may be used to endorse or promote products derived from
+ *    this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+package jdk.internal.org.objectweb.asm.tree;
+
+import java.util.Map;
+import jdk.internal.org.objectweb.asm.MethodVisitor;
+
+/**
+ * A node that represents a jump instruction. A jump instruction is an instruction that may jump to
+ * another instruction.
+ *
+ * @author Eric Bruneton
+ */
+public class JumpInsnNode extends AbstractInsnNode {
+
+    /**
+      * The operand of this instruction. This operand is a label that designates the instruction to
+      * which this instruction may jump.
+      */
+    public LabelNode label;
+
+    /**
+      * Constructs a new {@link JumpInsnNode}.
+      *
+      * @param opcode the opcode of the type instruction to be constructed. This opcode must be IFEQ,
+      *     IFNE, IFLT, IFGE, IFGT, IFLE, IF_ICMPEQ, IF_ICMPNE, IF_ICMPLT, IF_ICMPGE, IF_ICMPGT,
+      *     IF_ICMPLE, IF_ACMPEQ, IF_ACMPNE, GOTO, JSR, IFNULL or IFNONNULL.
+      * @param label the operand of the instruction to be constructed. This operand is a label that
+      *     designates the instruction to which the jump instruction may jump.
+      */
+    public JumpInsnNode(final int opcode, final LabelNode label) {
+        super(opcode);
+        this.label = label;
+    }
+
+    /**
+      * Sets the opcode of this instruction.
+      *
+      * @param opcode the new instruction opcode. This opcode must be IFEQ, IFNE, IFLT, IFGE, IFGT,
+      *     IFLE, IF_ICMPEQ, IF_ICMPNE, IF_ICMPLT, IF_ICMPGE, IF_ICMPGT, IF_ICMPLE, IF_ACMPEQ,
+      *     IF_ACMPNE, GOTO, JSR, IFNULL or IFNONNULL.
+      */
+    public void setOpcode(final int opcode) {
+        this.opcode = opcode;
+    }
+
+    @Override
+    public int getType() {
+        return JUMP_INSN;
+    }
+
+    @Override
+    public void accept(final MethodVisitor methodVisitor) {
+        methodVisitor.visitJumpInsn(opcode, label.getLabel());
+        acceptAnnotations(methodVisitor);
+    }
+
+    @Override
+    public AbstractInsnNode clone(final Map<LabelNode, LabelNode> clonedLabels) {
+        return new JumpInsnNode(opcode, clone(label, clonedLabels)).cloneAnnotations(this);
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/org/objectweb/asm/tree/LabelNode.class b/tests/test_data/std/jdk/internal/org/objectweb/asm/tree/LabelNode.class
new file mode 100644
index 0000000000000000000000000000000000000000..7744918a6ce9a8ccfb55c4b1efac12ad28b6a2f3
GIT binary patch
literal 1851
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zUt*x`1r2$L6kc^;Cqiu2&lM^1a+nSID`CCyT=o#DLyWhp4NR-ja-*Ztc&pMl<}gnT
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/org/objectweb/asm/tree/LabelNode.java b/tests/test_data/std/jdk/internal/org/objectweb/asm/tree/LabelNode.java
new file mode 100644
index 00000000..935382ad
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/org/objectweb/asm/tree/LabelNode.java
@@ -0,0 +1,111 @@
+/*
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/*
+ * This file is available under and governed by the GNU General Public
+ * License version 2 only, as published by the Free Software Foundation.
+ * However, the following notice accompanied the original version of this
+ * file:
+ *
+ * ASM: a very small and fast Java bytecode manipulation framework
+ * Copyright (c) 2000-2011 INRIA, France Telecom
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the copyright holders nor the names of its
+ *    contributors may be used to endorse or promote products derived from
+ *    this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+package jdk.internal.org.objectweb.asm.tree;
+
+import java.util.Map;
+import jdk.internal.org.objectweb.asm.Label;
+import jdk.internal.org.objectweb.asm.MethodVisitor;
+
+/** An {@link AbstractInsnNode} that encapsulates a {@link Label}. */
+public class LabelNode extends AbstractInsnNode {
+
+    private Label value;
+
+    public LabelNode() {
+        super(-1);
+    }
+
+    public LabelNode(final Label label) {
+        super(-1);
+        this.value = label;
+    }
+
+    @Override
+    public int getType() {
+        return LABEL;
+    }
+
+    /**
+      * Returns the label encapsulated by this node. A new label is created and associated with this
+      * node if it was created without an encapsulated label.
+      *
+      * @return the label encapsulated by this node.
+      */
+    public Label getLabel() {
+        if (value == null) {
+            value = new Label();
+        }
+        return value;
+    }
+
+    @Override
+    public void accept(final MethodVisitor methodVisitor) {
+        methodVisitor.visitLabel(getLabel());
+    }
+
+    @Override
+    public AbstractInsnNode clone(final Map<LabelNode, LabelNode> clonedLabels) {
+        return clonedLabels.get(this);
+    }
+
+    public void resetLabel() {
+        value = null;
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/org/objectweb/asm/tree/LdcInsnNode.class b/tests/test_data/std/jdk/internal/org/objectweb/asm/tree/LdcInsnNode.class
new file mode 100644
index 0000000000000000000000000000000000000000..f402af3fb322d6b15c2b1a7838f4ac4355207527
GIT binary patch
literal 1603
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zL?O|{AK;HNp4r{h7Kud?vdQGk$(iSz^PZXg`Rm&c02^4zBE_)KZXTG9Cq>|K*Ytyy
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zAzj)mH*&~hA`4x|Bnk}XS(x>v{RgMnp=2o5+x(E5F85mIPE>m>4+GO#6m?v}48!6G
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zP}W*ZysGq_QS9qFZr~<^VY|L3hS1(f^r`aK%A+be{TNMaBbwe+-SNbBuVaZ|k6SLy
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z#VP&+EF{!N(H_u@+(!zDVHt7)Zz6~u*;)c&c!>Gr=u3)L1r@55FUTEXs!~0|?8%Z2
zFb<a*>I{@r=$BML3FWAS3aUg?jW(zi#WlVo|4N~caiwyEYoExcMa{<by&WJLeWHOy
ZsHT=EI<8%LO!7P?PYTOqJ&CNRzX4=+tLgv%

literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/org/objectweb/asm/tree/LdcInsnNode.java b/tests/test_data/std/jdk/internal/org/objectweb/asm/tree/LdcInsnNode.java
new file mode 100644
index 00000000..1dac0b7a
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/org/objectweb/asm/tree/LdcInsnNode.java
@@ -0,0 +1,115 @@
+/*
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/*
+ * This file is available under and governed by the GNU General Public
+ * License version 2 only, as published by the Free Software Foundation.
+ * However, the following notice accompanied the original version of this
+ * file:
+ *
+ * ASM: a very small and fast Java bytecode manipulation framework
+ * Copyright (c) 2000-2011 INRIA, France Telecom
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the copyright holders nor the names of its
+ *    contributors may be used to endorse or promote products derived from
+ *    this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+package jdk.internal.org.objectweb.asm.tree;
+
+import java.util.Map;
+import jdk.internal.org.objectweb.asm.ConstantDynamic;
+import jdk.internal.org.objectweb.asm.Handle;
+import jdk.internal.org.objectweb.asm.MethodVisitor;
+import jdk.internal.org.objectweb.asm.Opcodes;
+import jdk.internal.org.objectweb.asm.Type;
+
+/**
+ * A node that represents an LDC instruction.
+ *
+ * @author Eric Bruneton
+ */
+public class LdcInsnNode extends AbstractInsnNode {
+
+    /**
+      * The constant to be loaded on the stack. This field must be a non null {@link Integer}, a {@link
+      * Float}, a {@link Long}, a {@link Double}, a {@link String}, a {@link Type} of OBJECT or ARRAY
+      * sort for {@code .class} constants, for classes whose version is 49, a {@link Type} of METHOD
+      * sort for MethodType, a {@link Handle} for MethodHandle constants, for classes whose version is
+      * 51 or a {@link ConstantDynamic} for a constant dynamic for classes whose version is 55.
+      */
+    public Object cst;
+
+    /**
+      * Constructs a new {@link LdcInsnNode}.
+      *
+      * @param value the constant to be loaded on the stack. This parameter mist be a non null {@link
+      *     Integer}, a {@link Float}, a {@link Long}, a {@link Double}, a {@link String}, a {@link
+      *     Type} of OBJECT or ARRAY sort for {@code .class} constants, for classes whose version is
+      *     49, a {@link Type} of METHOD sort for MethodType, a {@link Handle} for MethodHandle
+      *     constants, for classes whose version is 51 or a {@link ConstantDynamic} for a constant
+      *     dynamic for classes whose version is 55.
+      */
+    public LdcInsnNode(final Object value) {
+        super(Opcodes.LDC);
+        this.cst = value;
+    }
+
+    @Override
+    public int getType() {
+        return LDC_INSN;
+    }
+
+    @Override
+    public void accept(final MethodVisitor methodVisitor) {
+        methodVisitor.visitLdcInsn(cst);
+        acceptAnnotations(methodVisitor);
+    }
+
+    @Override
+    public AbstractInsnNode clone(final Map<LabelNode, LabelNode> clonedLabels) {
+        return new LdcInsnNode(cst).cloneAnnotations(this);
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/org/objectweb/asm/tree/LineNumberNode.class b/tests/test_data/std/jdk/internal/org/objectweb/asm/tree/LineNumberNode.class
new file mode 100644
index 0000000000000000000000000000000000000000..04289a23426e8a6c72e8393347bba84fe8eeb915
GIT binary patch
literal 1785
zcmcIlTTc@~6#k|c3U#p+YQ5kEylxBa%Ee1kLSjh7CWRMB6&_5c+X*agcgc2&@fZ2x
zgC<;zCjJ0_l<~}LwX`wWV&cor%$Ygg`ObIF%>MZK^*ex7JWC^ncnS#vNsKTo?Kj_A
zjweOnao6&LUCVFm3tPSu4U4y1mJEcjo;TVu;I^!KZEwSG3Wkwo$8+QgL&B^U>SGwi
zSPE$a7ho_f41-y7Jh9PfHAE01CR{Qwu&M&PXdr_uL$WP-AQ`OMP>{SKT!mIiV*-;Y
z<P2O!o}qLuZ-&ubA!`bZ!88j|vGqv`c@@`ExNcwyHyGw3LaqzB=Qrz4+mU|2kU3Pd
zo+b=MvpQVhLOo52-7;_+)1;W~`btONjPll%)!emYwS9ibt&VhDYn>ldBC{TFR~+uB
zp1RAh7)^b^yHKZ2TGgGE>4~t#8!n|XQS)u?)_LHlb=R1Xdrq6$cepJ3dac5cq5^Nd
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z%aHHak|gNr>GvO9j>=)6fag5ELR`l-on4R1PC!-oFrdJH4?kRc|3%^Srr!x{@xoD^
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znQSrKr|$%L0I$gBHPYB7lpQ=E%XH|6hcIbH2s#eaGZjfiE}+<rQ=(Dr#j}}@G=$J2
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L9@FfJo<02qhVkK^

literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/org/objectweb/asm/tree/LineNumberNode.java b/tests/test_data/std/jdk/internal/org/objectweb/asm/tree/LineNumberNode.java
new file mode 100644
index 00000000..4feb1307
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/org/objectweb/asm/tree/LineNumberNode.java
@@ -0,0 +1,106 @@
+/*
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/*
+ * This file is available under and governed by the GNU General Public
+ * License version 2 only, as published by the Free Software Foundation.
+ * However, the following notice accompanied the original version of this
+ * file:
+ *
+ * ASM: a very small and fast Java bytecode manipulation framework
+ * Copyright (c) 2000-2011 INRIA, France Telecom
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the copyright holders nor the names of its
+ *    contributors may be used to endorse or promote products derived from
+ *    this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+package jdk.internal.org.objectweb.asm.tree;
+
+import java.util.Map;
+import jdk.internal.org.objectweb.asm.MethodVisitor;
+
+/**
+ * A node that represents a line number declaration. These nodes are pseudo instruction nodes in
+ * order to be inserted in an instruction list.
+ *
+ * @author Eric Bruneton
+ */
+public class LineNumberNode extends AbstractInsnNode {
+
+    /** A line number. This number refers to the source file from which the class was compiled. */
+    public int line;
+
+    /** The first instruction corresponding to this line number. */
+    public LabelNode start;
+
+    /**
+      * Constructs a new {@link LineNumberNode}.
+      *
+      * @param line a line number. This number refers to the source file from which the class was
+      *     compiled.
+      * @param start the first instruction corresponding to this line number.
+      */
+    public LineNumberNode(final int line, final LabelNode start) {
+        super(-1);
+        this.line = line;
+        this.start = start;
+    }
+
+    @Override
+    public int getType() {
+        return LINE;
+    }
+
+    @Override
+    public void accept(final MethodVisitor methodVisitor) {
+        methodVisitor.visitLineNumber(line, start.getLabel());
+    }
+
+    @Override
+    public AbstractInsnNode clone(final Map<LabelNode, LabelNode> clonedLabels) {
+        return new LineNumberNode(line, clone(start, clonedLabels));
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/org/objectweb/asm/tree/LocalVariableAnnotationNode.class b/tests/test_data/std/jdk/internal/org/objectweb/asm/tree/LocalVariableAnnotationNode.class
new file mode 100644
index 0000000000000000000000000000000000000000..7f6b519a37742da43552185224482451e41123f3
GIT binary patch
literal 2947
zcmb_e-BTM?6#w0P?1r!uicNI|ORJ;}fv^=@RD!g$6`M9dB{UZBYm;olLfB+B3$>l`
z%{QO4e(<KHc5r-iMriA3M_>Jqe6gN;6Ba_TTV|YraPG-Dzxz91_wd(0zdizR9wiw*
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zp{2`ty_D5$Q_q!*QOhbjx?`5D2?Ax1hE2<KMi|y&sZ`nnZu(}$xS~7r$vH2}+QoX#
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zM!c6$-lX5RMDa)%?cBuMo4Cxg<OeU|02KQC4lVeeV!MMF)-Z^>xQrj5;~o`u4WD8i
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opc^Z=F3Mjd%OmhTCb*D{po}plV_y82j9~tz3^Oc{l@E*m0_B$>8~^|S

literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/org/objectweb/asm/tree/LocalVariableAnnotationNode.java b/tests/test_data/std/jdk/internal/org/objectweb/asm/tree/LocalVariableAnnotationNode.java
new file mode 100644
index 00000000..2a593ca1
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/org/objectweb/asm/tree/LocalVariableAnnotationNode.java
@@ -0,0 +1,171 @@
+/*
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/*
+ * This file is available under and governed by the GNU General Public
+ * License version 2 only, as published by the Free Software Foundation.
+ * However, the following notice accompanied the original version of this
+ * file:
+ *
+ * ASM: a very small and fast Java bytecode manipulation framework
+ * Copyright (c) 2000-2011 INRIA, France Telecom
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the copyright holders nor the names of its
+ *    contributors may be used to endorse or promote products derived from
+ *    this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+package jdk.internal.org.objectweb.asm.tree;
+
+import java.util.List;
+import jdk.internal.org.objectweb.asm.Label;
+import jdk.internal.org.objectweb.asm.MethodVisitor;
+import jdk.internal.org.objectweb.asm.Opcodes;
+import jdk.internal.org.objectweb.asm.TypePath;
+
+/**
+ * A node that represents a type annotation on a local or resource variable.
+ *
+ * @author Eric Bruneton
+ */
+public class LocalVariableAnnotationNode extends TypeAnnotationNode {
+
+    /**
+      * The fist instructions corresponding to the continuous ranges that make the scope of this local
+      * variable (inclusive). Must not be {@literal null}.
+      */
+    public List<LabelNode> start;
+
+    /**
+      * The last instructions corresponding to the continuous ranges that make the scope of this local
+      * variable (exclusive). This list must have the same size as the 'start' list. Must not be
+      * {@literal null}.
+      */
+    public List<LabelNode> end;
+
+    /**
+      * The local variable's index in each range. This list must have the same size as the 'start'
+      * list. Must not be {@literal null}.
+      */
+    public List<Integer> index;
+
+    /**
+      * Constructs a new {@link LocalVariableAnnotationNode}. <i>Subclasses must not use this
+      * constructor</i>. Instead, they must use the {@link #LocalVariableAnnotationNode(int, TypePath,
+      * LabelNode[], LabelNode[], int[], String)} version.
+      *
+      * @param typeRef a reference to the annotated type. See {@link jdk.internal.org.objectweb.asm.TypeReference}.
+      * @param typePath the path to the annotated type argument, wildcard bound, array element type, or
+      *     static inner type within 'typeRef'. May be {@literal null} if the annotation targets
+      *     'typeRef' as a whole.
+      * @param start the fist instructions corresponding to the continuous ranges that make the scope
+      *     of this local variable (inclusive).
+      * @param end the last instructions corresponding to the continuous ranges that make the scope of
+      *     this local variable (exclusive). This array must have the same size as the 'start' array.
+      * @param index the local variable's index in each range. This array must have the same size as
+      *     the 'start' array.
+      * @param descriptor the class descriptor of the annotation class.
+      */
+    public LocalVariableAnnotationNode(
+            final int typeRef,
+            final TypePath typePath,
+            final LabelNode[] start,
+            final LabelNode[] end,
+            final int[] index,
+            final String descriptor) {
+        this(/* latest api = */ Opcodes.ASM9, typeRef, typePath, start, end, index, descriptor);
+    }
+
+    /**
+      * Constructs a new {@link LocalVariableAnnotationNode}.
+      *
+      * @param api the ASM API version implemented by this visitor. Must be one of the {@code
+      *     ASM}<i>x</i> values in {@link Opcodes}.
+      * @param typeRef a reference to the annotated type. See {@link jdk.internal.org.objectweb.asm.TypeReference}.
+      * @param start the fist instructions corresponding to the continuous ranges that make the scope
+      *     of this local variable (inclusive).
+      * @param end the last instructions corresponding to the continuous ranges that make the scope of
+      *     this local variable (exclusive). This array must have the same size as the 'start' array.
+      * @param index the local variable's index in each range. This array must have the same size as
+      *     the 'start' array.
+      * @param typePath the path to the annotated type argument, wildcard bound, array element type, or
+      *     static inner type within 'typeRef'. May be {@literal null} if the annotation targets
+      *     'typeRef' as a whole.
+      * @param descriptor the class descriptor of the annotation class.
+      */
+    public LocalVariableAnnotationNode(
+            final int api,
+            final int typeRef,
+            final TypePath typePath,
+            final LabelNode[] start,
+            final LabelNode[] end,
+            final int[] index,
+            final String descriptor) {
+        super(api, typeRef, typePath, descriptor);
+        this.start = Util.asArrayList(start);
+        this.end = Util.asArrayList(end);
+        this.index = Util.asArrayList(index);
+    }
+
+    /**
+      * Makes the given visitor visit this type annotation.
+      *
+      * @param methodVisitor the visitor that must visit this annotation.
+      * @param visible {@literal true} if the annotation is visible at runtime.
+      */
+    public void accept(final MethodVisitor methodVisitor, final boolean visible) {
+        Label[] startLabels = new Label[this.start.size()];
+        Label[] endLabels = new Label[this.end.size()];
+        int[] indices = new int[this.index.size()];
+        for (int i = 0, n = startLabels.length; i < n; ++i) {
+            startLabels[i] = this.start.get(i).getLabel();
+            endLabels[i] = this.end.get(i).getLabel();
+            indices[i] = this.index.get(i);
+        }
+        accept(
+                methodVisitor.visitLocalVariableAnnotation(
+                        typeRef, typePath, startLabels, endLabels, indices, desc, visible));
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/org/objectweb/asm/tree/LocalVariableNode.class b/tests/test_data/std/jdk/internal/org/objectweb/asm/tree/LocalVariableNode.class
new file mode 100644
index 0000000000000000000000000000000000000000..fcab4d96c387df9dbe219830c4237d89d5fc3d8e
GIT binary patch
literal 1440
zcmcJP%~BIV5Xb+MY!VWeuOJ}!3200<z=~fSVtJv;lB$3QtlTG?sW2hg#mxpq?>>W%
z;MJ-Gt33DsK9ptmgaV>fBpkeK_e{<9|JOa;^XvDIp8&S7nL!Nk6f7GFBn74#@<_T(
z>DS#i)rRsSf#eJA>*%FGJYT4!F@|&s85`GN3p{Jo4qWX=D)eR34Z^w`n7`husw>+q
zHwu+<%Yi4G6&Y$-ZK~a%rUWcsw#a15=W=^dsQr401tx4va&)Vv+8%FA+sN`px~=QJ
zj5?v>-Rm}HF(;5{M=~T(w>%P!tg0qc7^xdJ7C1&+`8AGt)5a~_rkL8VsSg5TJA=Ep
zm%@^bWvmFST}eY=tgfOmOA6%kg<*u|WGRCO$ffYmMji!$)gh8QD%uZf72VcR5K>W(
z*c&Liz~}tGr5<hP@(b<*kCxVUp(60*KY{c+?d)!c5&d=Cpjlg{Hz&*5SG%27RfTW4
zW4TQ)cJS$@747S`z~*R57Xz5)6UcCPhx*W5T2gwRI;1Avp!!^1@`39vaZSftgB`Gb
zwGf1|7j!~Tz0#cR+(5PryUtUJB^r+yJsL>}9)9u!kEyXVoyO8U8cQ=}EX@+x7@bVO
zp>L5^Uum5pn{&QHIK>`P&T0?i&RP#s&Vtp$jI)sFVcwZd_OSTP{J%=yWzq*4uyBAh
znwUTfGw^AC0~*monwfW4qZ6<D(XkGfR-|KSh4CH{C+Cpk_XKg{F|%bnrcM}-xjD}b
zJU*rNC@TNCQgpgR+$G>H@pdtDf;(j9`)2V3_s@~DCh#$)@sSXZDTPl4ajqZg3~>cd
O@RWq;K_!V8p8o+;mvS!v

literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/org/objectweb/asm/tree/LocalVariableNode.java b/tests/test_data/std/jdk/internal/org/objectweb/asm/tree/LocalVariableNode.java
new file mode 100644
index 00000000..7bfb121b
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/org/objectweb/asm/tree/LocalVariableNode.java
@@ -0,0 +1,124 @@
+/*
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/*
+ * This file is available under and governed by the GNU General Public
+ * License version 2 only, as published by the Free Software Foundation.
+ * However, the following notice accompanied the original version of this
+ * file:
+ *
+ * ASM: a very small and fast Java bytecode manipulation framework
+ * Copyright (c) 2000-2011 INRIA, France Telecom
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the copyright holders nor the names of its
+ *    contributors may be used to endorse or promote products derived from
+ *    this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+package jdk.internal.org.objectweb.asm.tree;
+
+import jdk.internal.org.objectweb.asm.MethodVisitor;
+
+/**
+ * A node that represents a local variable declaration.
+ *
+ * @author Eric Bruneton
+ */
+public class LocalVariableNode {
+
+    /** The name of a local variable. */
+    public String name;
+
+    /** The type descriptor of this local variable. */
+    public String desc;
+
+    /** The signature of this local variable. May be {@literal null}. */
+    public String signature;
+
+    /** The first instruction corresponding to the scope of this local variable (inclusive). */
+    public LabelNode start;
+
+    /** The last instruction corresponding to the scope of this local variable (exclusive). */
+    public LabelNode end;
+
+    /** The local variable's index. */
+    public int index;
+
+    /**
+      * Constructs a new {@link LocalVariableNode}.
+      *
+      * @param name the name of a local variable.
+      * @param descriptor the type descriptor of this local variable.
+      * @param signature the signature of this local variable. May be {@literal null}.
+      * @param start the first instruction corresponding to the scope of this local variable
+      *     (inclusive).
+      * @param end the last instruction corresponding to the scope of this local variable (exclusive).
+      * @param index the local variable's index.
+      */
+    public LocalVariableNode(
+            final String name,
+            final String descriptor,
+            final String signature,
+            final LabelNode start,
+            final LabelNode end,
+            final int index) {
+        this.name = name;
+        this.desc = descriptor;
+        this.signature = signature;
+        this.start = start;
+        this.end = end;
+        this.index = index;
+    }
+
+    /**
+      * Makes the given visitor visit this local variable declaration.
+      *
+      * @param methodVisitor a method visitor.
+      */
+    public void accept(final MethodVisitor methodVisitor) {
+        methodVisitor.visitLocalVariable(
+                name, desc, signature, start.getLabel(), end.getLabel(), index);
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/org/objectweb/asm/tree/LookupSwitchInsnNode.class b/tests/test_data/std/jdk/internal/org/objectweb/asm/tree/LookupSwitchInsnNode.class
new file mode 100644
index 0000000000000000000000000000000000000000..7cecbb98e78faeeef4099292f789c0e3d319a793
GIT binary patch
literal 3190
zcmcImU3U{z6x}zOc4#_$6#`V-@(oFvG)1u@sl`wMqiHJ?f>0GF$&gMvor#kP*!s$g
ze}fku@Ilv-Qv6`~?7wg=|Aa5-zBgT%gf5ak_|VDyIQN`=_SyH`{_*1H=K!YhwT_U$
zsipFA+I9oWcTFel`IWR+T(U~ReXE!@Yb)uwYRM~GwFory=;$?|V~4=m4yOX&veMaN
zE%41!kaKJ9ES(7SPTH;=ObKYQT)fbS2>Nvx26keXz`1UG<~?t@UY);h2c^aT{A%U9
zP9TuZcjdw?T8_k%iC_=*>KHJv5BmjT-JHG=*p5KIS<Cvqxth0YjJrR!kc;P+%zI|K
z&h4~Z&B*Ky7&wSSOn2E@tqJUDw~+wekkQ{1I2l`LY&)h~NzbVwWVZA=Y+yus?R8`(
zwSFAIQ60w&9LEWPU9C76yk@VF`*19tlcuK(oJNfEibd#A7UI>gIuZhVl_P~FM}1T*
zKY}=t22wK24r-=gI(17&THr(n>hcn)jxz$O4wgze%3PKxf^ocU;4I!@L;_YDtW=Dk
zU$0wb$qK)Vb2{ELa2^?fWQRjDR<P)m3wF&8JfGy;lcRRY30#YH7kweel6C_#UWiaF
z?;DuH1rl$TN>(+<x~><Pf$h1J&Y6xOTd-#u9<v56Vp^c5<ajPM;C1xUN`IzFurp>=
z%JKE-v>lgOU6L3s3tVOF)*I3^SI#?<wT1VOWJAgcl((B%7qw{%7ca=`^NE2xW_bC`
zayjd;6%01#HSIYLn<s0QiQksl&l&g>S9$eS1zJk#b_cn=i*{LrSB?qv&D#~%4C+3W
zaI%Sf*{&uV^XA*0nc|JfzG}BE1xO#-v}*pl^R{cv)>n#_f88uP1Tm2JN~TjVeOt~q
z7qwu~rr^(aC$%k}14axjP!i+Y)sukE7IS^IN@%@}J18J*{?VIo1$M5q_J^@f7+dco
zD<Izi^>FYBaa8x-oSp6nw$acCVm>fS%e*j(FCDja5bu>{6?T7Bw@`_plv-BdSclzB
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z^cfBd{2G}FPbHsEXv0zMA%>E}a%cD%PKNM1;_Dcldk_|n{`rf`L+Ze97@G}GXsPED
zJy9*%^AIDcs3v!#+UBY8b-XqIK;x-DN4e3*X)?8riNxqSCM7jtg?J48950cUW%BJ{
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zwQKZNBnJllmlU;Am_!*Cz1*ecA!si!prazh-xzs;eL5E9@F>q*giVfR?Y|>;Vg9Cm
zLFAUqY;*%32$?$vA3nvEnIy^MoYa0C!p&r29kW01KqKJ+Rqt=m$8-h>?littNgZi8
leF-*2QkEHbkZQR|ZG=b;2wm1(?yYdt5Ub0P$JG$3{{mF=ds_ei

literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/org/objectweb/asm/tree/LookupSwitchInsnNode.java b/tests/test_data/std/jdk/internal/org/objectweb/asm/tree/LookupSwitchInsnNode.java
new file mode 100644
index 00000000..31d3c79b
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/org/objectweb/asm/tree/LookupSwitchInsnNode.java
@@ -0,0 +1,125 @@
+/*
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/*
+ * This file is available under and governed by the GNU General Public
+ * License version 2 only, as published by the Free Software Foundation.
+ * However, the following notice accompanied the original version of this
+ * file:
+ *
+ * ASM: a very small and fast Java bytecode manipulation framework
+ * Copyright (c) 2000-2011 INRIA, France Telecom
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the copyright holders nor the names of its
+ *    contributors may be used to endorse or promote products derived from
+ *    this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+package jdk.internal.org.objectweb.asm.tree;
+
+import java.util.List;
+import java.util.Map;
+import jdk.internal.org.objectweb.asm.Label;
+import jdk.internal.org.objectweb.asm.MethodVisitor;
+import jdk.internal.org.objectweb.asm.Opcodes;
+
+/**
+ * A node that represents a LOOKUPSWITCH instruction.
+ *
+ * @author Eric Bruneton
+ */
+public class LookupSwitchInsnNode extends AbstractInsnNode {
+
+    /** Beginning of the default handler block. */
+    public LabelNode dflt;
+
+    /** The values of the keys. */
+    public List<Integer> keys;
+
+    /** Beginnings of the handler blocks. */
+    public List<LabelNode> labels;
+
+    /**
+      * Constructs a new {@link LookupSwitchInsnNode}.
+      *
+      * @param dflt beginning of the default handler block.
+      * @param keys the values of the keys.
+      * @param labels beginnings of the handler blocks. {@code labels[i]} is the beginning of the
+      *     handler block for the {@code keys[i]} key.
+      */
+    public LookupSwitchInsnNode(final LabelNode dflt, final int[] keys, final LabelNode[] labels) {
+        super(Opcodes.LOOKUPSWITCH);
+        this.dflt = dflt;
+        this.keys = Util.asArrayList(keys);
+        this.labels = Util.asArrayList(labels);
+    }
+
+    @Override
+    public int getType() {
+        return LOOKUPSWITCH_INSN;
+    }
+
+    @Override
+    public void accept(final MethodVisitor methodVisitor) {
+        int[] keysArray = new int[this.keys.size()];
+        for (int i = 0, n = keysArray.length; i < n; ++i) {
+            keysArray[i] = this.keys.get(i).intValue();
+        }
+        Label[] labelsArray = new Label[this.labels.size()];
+        for (int i = 0, n = labelsArray.length; i < n; ++i) {
+            labelsArray[i] = this.labels.get(i).getLabel();
+        }
+        methodVisitor.visitLookupSwitchInsn(dflt.getLabel(), keysArray, labelsArray);
+        acceptAnnotations(methodVisitor);
+    }
+
+    @Override
+    public AbstractInsnNode clone(final Map<LabelNode, LabelNode> clonedLabels) {
+        LookupSwitchInsnNode clone =
+                new LookupSwitchInsnNode(clone(dflt, clonedLabels), null, clone(labels, clonedLabels));
+        clone.keys.addAll(keys);
+        return clone.cloneAnnotations(this);
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/org/objectweb/asm/tree/MethodInsnNode.class b/tests/test_data/std/jdk/internal/org/objectweb/asm/tree/MethodInsnNode.class
new file mode 100644
index 0000000000000000000000000000000000000000..58b42fda93b5658862df31ed5b404215ff454a3c
GIT binary patch
literal 2250
zcmcIlO>Y}j6g|%#dm49AHz_em?S}AG?1_`1C4AMv5CSch+_FeziR{Lci8HA)V~r=R
z5T9ERVgoGLvFip2km6K;)F03vMLF+{WydL!(@03x`?z!8z2}^J-}9q?{(1;t9UtjP
z2wdLXx?_2M<c7Z8wt}!_1<hU8iSD^g%kJ)3A9tK!%k5^MA*Ca2K*t$@t7A?@q3c>V
z-DoG+s`*|27DEW6S3Td0ssfc_t-fpDwXL@8x2%mQ^!!%kB$mxmBZCai>M$gbNr9D<
z09k8xqtJGuAr!4xD>Wv_DQn<7rUX*KJ>Lxlrk{i%-7Xk-M!IRfz2{0p&cL(EKy4gp
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z%Boy8@Cu3oQ?}!{ooLPXgUF7&!0!rNDb}ARK}E`|!8EXlvcP$#9r*4@K!0pNRr%wB
zS4!h>{P!_|Yo~3MQiIi6SACbQd%k;Xf3N9=x9w(|oj6?&9J}4HLr?DeMlIU$sM*Si
zpbl#wd%Gf#k&O^~9aX2vjmUQH+_XC?w2n6@=JAFXIO}z5^5SjV4lzx1-6+0n0(#4h
zZhzXLHCZgx*g$b@1t#~@of<U6@;I;~4MdnJRa1c*ETp`F`;phS2=w$7GE~H^y4`f!
zlrMWMu0U>7Y|`or9*nxKj^m<wMCDPMKc#z>>?bz7mTyP<A(g#<Oo9JB{i*LjW+T`S
z9rwB?Tld0f=Pk=B@=ekBEP^8&4O3hR`Ch4+&y<?^I&n_(i;g9Z%iR6Ob&7M&%$Jwu
zwEPtQ`~|vpA6oJOl7H|^5*Eh{5*%BY!46*KY9&5}E4a!X&&zj?G383;m)<#rAgNZb
z(Wdbf@D37>xk;skj@RSg$mTJ9Mn0yGc=7?2e?NWj-!V;^?gcad025}phjZpq57XwH
z*29cBlj>nsQb;HY7nSd41pYbce1R;!B%QA)%GZigHI6l)R2Wby3@8-_lnRI`F+1L5
zj1)1wg~>j$DsxH+(q_Jg!Vp6&<2UsFR^`maUW1(Jeole6ajhS#%vlPXIP>d(i!37W
zy^3MPU;8om--;qFvbdXMBvH&Sng<l=fbtwrodarffZ0PVn2U#ad5G>Diw*pMS^S7g
z_~{73`2oUttg?g>Q5Ekpy3Di9n#ep0e?$9(p`S>_Rx%G!`kg*;JH_~aK9XT!kYNGu
aVU6+Mr+3UvTGna#fR+S4<m$Rw-S`((@EfN9

literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/org/objectweb/asm/tree/MethodInsnNode.java b/tests/test_data/std/jdk/internal/org/objectweb/asm/tree/MethodInsnNode.java
new file mode 100644
index 00000000..77e720b6
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/org/objectweb/asm/tree/MethodInsnNode.java
@@ -0,0 +1,155 @@
+/*
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/*
+ * This file is available under and governed by the GNU General Public
+ * License version 2 only, as published by the Free Software Foundation.
+ * However, the following notice accompanied the original version of this
+ * file:
+ *
+ * ASM: a very small and fast Java bytecode manipulation framework
+ * Copyright (c) 2000-2011 INRIA, France Telecom
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the copyright holders nor the names of its
+ *    contributors may be used to endorse or promote products derived from
+ *    this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+package jdk.internal.org.objectweb.asm.tree;
+
+import java.util.Map;
+import jdk.internal.org.objectweb.asm.MethodVisitor;
+import jdk.internal.org.objectweb.asm.Opcodes;
+
+/**
+ * A node that represents a method instruction. A method instruction is an instruction that invokes
+ * a method.
+ *
+ * @author Eric Bruneton
+ */
+public class MethodInsnNode extends AbstractInsnNode {
+
+    /**
+      * The internal name of the method's owner class (see {@link
+      * jdk.internal.org.objectweb.asm.Type#getInternalName()}).
+      *
+      * <p>For methods of arrays, e.g., {@code clone()}, the array type descriptor.
+      */
+    public String owner;
+
+    /** The method's name. */
+    public String name;
+
+    /** The method's descriptor (see {@link jdk.internal.org.objectweb.asm.Type}). */
+    public String desc;
+
+    /** Whether the method's owner class if an interface. */
+    public boolean itf;
+
+    /**
+      * Constructs a new {@link MethodInsnNode}.
+      *
+      * @param opcode the opcode of the type instruction to be constructed. This opcode must be
+      *     INVOKEVIRTUAL, INVOKESPECIAL, INVOKESTATIC or INVOKEINTERFACE.
+      * @param owner the internal name of the method's owner class (see {@link
+      *     jdk.internal.org.objectweb.asm.Type#getInternalName()}).
+      * @param name the method's name.
+      * @param descriptor the method's descriptor (see {@link jdk.internal.org.objectweb.asm.Type}).
+      */
+    public MethodInsnNode(
+            final int opcode, final String owner, final String name, final String descriptor) {
+        this(opcode, owner, name, descriptor, opcode == Opcodes.INVOKEINTERFACE);
+    }
+
+    /**
+      * Constructs a new {@link MethodInsnNode}.
+      *
+      * @param opcode the opcode of the type instruction to be constructed. This opcode must be
+      *     INVOKEVIRTUAL, INVOKESPECIAL, INVOKESTATIC or INVOKEINTERFACE.
+      * @param owner the internal name of the method's owner class (see {@link
+      *     jdk.internal.org.objectweb.asm.Type#getInternalName()}).
+      * @param name the method's name.
+      * @param descriptor the method's descriptor (see {@link jdk.internal.org.objectweb.asm.Type}).
+      * @param isInterface if the method's owner class is an interface.
+      */
+    public MethodInsnNode(
+            final int opcode,
+            final String owner,
+            final String name,
+            final String descriptor,
+            final boolean isInterface) {
+        super(opcode);
+        this.owner = owner;
+        this.name = name;
+        this.desc = descriptor;
+        this.itf = isInterface;
+    }
+
+    /**
+      * Sets the opcode of this instruction.
+      *
+      * @param opcode the new instruction opcode. This opcode must be INVOKEVIRTUAL, INVOKESPECIAL,
+      *     INVOKESTATIC or INVOKEINTERFACE.
+      */
+    public void setOpcode(final int opcode) {
+        this.opcode = opcode;
+    }
+
+    @Override
+    public int getType() {
+        return METHOD_INSN;
+    }
+
+    @Override
+    public void accept(final MethodVisitor methodVisitor) {
+        methodVisitor.visitMethodInsn(opcode, owner, name, desc, itf);
+        acceptAnnotations(methodVisitor);
+    }
+
+    @Override
+    public AbstractInsnNode clone(final Map<LabelNode, LabelNode> clonedLabels) {
+        return new MethodInsnNode(opcode, owner, name, desc, itf).cloneAnnotations(this);
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/org/objectweb/asm/tree/MethodNode$1.class b/tests/test_data/std/jdk/internal/org/objectweb/asm/tree/MethodNode$1.class
new file mode 100644
index 0000000000000000000000000000000000000000..bc3dafaeaaab3fe73cd43fbe78d5846b32d68198
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diff --git a/tests/test_data/std/jdk/internal/org/objectweb/asm/tree/MethodNode.class b/tests/test_data/std/jdk/internal/org/objectweb/asm/tree/MethodNode.class
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HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/org/objectweb/asm/tree/MethodNode.java b/tests/test_data/std/jdk/internal/org/objectweb/asm/tree/MethodNode.java
new file mode 100644
index 00000000..3ec2ac6d
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/org/objectweb/asm/tree/MethodNode.java
@@ -0,0 +1,804 @@
+/*
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/*
+ * This file is available under and governed by the GNU General Public
+ * License version 2 only, as published by the Free Software Foundation.
+ * However, the following notice accompanied the original version of this
+ * file:
+ *
+ * ASM: a very small and fast Java bytecode manipulation framework
+ * Copyright (c) 2000-2011 INRIA, France Telecom
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the copyright holders nor the names of its
+ *    contributors may be used to endorse or promote products derived from
+ *    this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+package jdk.internal.org.objectweb.asm.tree;
+
+import java.util.ArrayList;
+import java.util.List;
+import jdk.internal.org.objectweb.asm.AnnotationVisitor;
+import jdk.internal.org.objectweb.asm.Attribute;
+import jdk.internal.org.objectweb.asm.ClassVisitor;
+import jdk.internal.org.objectweb.asm.ConstantDynamic;
+import jdk.internal.org.objectweb.asm.Handle;
+import jdk.internal.org.objectweb.asm.Label;
+import jdk.internal.org.objectweb.asm.MethodVisitor;
+import jdk.internal.org.objectweb.asm.Opcodes;
+import jdk.internal.org.objectweb.asm.Type;
+import jdk.internal.org.objectweb.asm.TypePath;
+
+/**
+ * A node that represents a method.
+ *
+ * @author Eric Bruneton
+ */
+public class MethodNode extends MethodVisitor {
+
+    /**
+      * The method's access flags (see {@link Opcodes}). This field also indicates if the method is
+      * synthetic and/or deprecated.
+      */
+    public int access;
+
+    /** The method's name. */
+    public String name;
+
+    /** The method's descriptor (see {@link Type}). */
+    public String desc;
+
+    /** The method's signature. May be {@literal null}. */
+    public String signature;
+
+    /** The internal names of the method's exception classes (see {@link Type#getInternalName()}). */
+    public List<String> exceptions;
+
+    /** The method parameter info (access flags and name). */
+    public List<ParameterNode> parameters;
+
+    /** The runtime visible annotations of this method. May be {@literal null}. */
+    public List<AnnotationNode> visibleAnnotations;
+
+    /** The runtime invisible annotations of this method. May be {@literal null}. */
+    public List<AnnotationNode> invisibleAnnotations;
+
+    /** The runtime visible type annotations of this method. May be {@literal null}. */
+    public List<TypeAnnotationNode> visibleTypeAnnotations;
+
+    /** The runtime invisible type annotations of this method. May be {@literal null}. */
+    public List<TypeAnnotationNode> invisibleTypeAnnotations;
+
+    /** The non standard attributes of this method. May be {@literal null}. */
+    public List<Attribute> attrs;
+
+    /**
+      * The default value of this annotation interface method. This field must be a {@link Byte},
+      * {@link Boolean}, {@link Character}, {@link Short}, {@link Integer}, {@link Long}, {@link
+      * Float}, {@link Double}, {@link String} or {@link Type}, or an two elements String array (for
+      * enumeration values), a {@link AnnotationNode}, or a {@link List} of values of one of the
+      * preceding types. May be {@literal null}.
+      */
+    public Object annotationDefault;
+
+    /**
+      * The number of method parameters than can have runtime visible annotations. This number must be
+      * less or equal than the number of parameter types in the method descriptor (the default value 0
+      * indicates that all the parameters described in the method descriptor can have annotations). It
+      * can be strictly less when a method has synthetic parameters and when these parameters are
+      * ignored when computing parameter indices for the purpose of parameter annotations (see
+      * https://docs.oracle.com/javase/specs/jvms/se9/html/jvms-4.html#jvms-4.7.18).
+      */
+    public int visibleAnnotableParameterCount;
+
+    /**
+      * The runtime visible parameter annotations of this method. These lists are lists of {@link
+      * AnnotationNode} objects. May be {@literal null}.
+      */
+    public List<AnnotationNode>[] visibleParameterAnnotations;
+
+    /**
+      * The number of method parameters than can have runtime invisible annotations. This number must
+      * be less or equal than the number of parameter types in the method descriptor (the default value
+      * 0 indicates that all the parameters described in the method descriptor can have annotations).
+      * It can be strictly less when a method has synthetic parameters and when these parameters are
+      * ignored when computing parameter indices for the purpose of parameter annotations (see
+      * https://docs.oracle.com/javase/specs/jvms/se9/html/jvms-4.html#jvms-4.7.18).
+      */
+    public int invisibleAnnotableParameterCount;
+
+    /**
+      * The runtime invisible parameter annotations of this method. These lists are lists of {@link
+      * AnnotationNode} objects. May be {@literal null}.
+      */
+    public List<AnnotationNode>[] invisibleParameterAnnotations;
+
+    /** The instructions of this method. */
+    public InsnList instructions;
+
+    /** The try catch blocks of this method. */
+    public List<TryCatchBlockNode> tryCatchBlocks;
+
+    /** The maximum stack size of this method. */
+    public int maxStack;
+
+    /** The maximum number of local variables of this method. */
+    public int maxLocals;
+
+    /** The local variables of this method. May be {@literal null} */
+    public List<LocalVariableNode> localVariables;
+
+    /** The visible local variable annotations of this method. May be {@literal null} */
+    public List<LocalVariableAnnotationNode> visibleLocalVariableAnnotations;
+
+    /** The invisible local variable annotations of this method. May be {@literal null} */
+    public List<LocalVariableAnnotationNode> invisibleLocalVariableAnnotations;
+
+    /** Whether the accept method has been called on this object. */
+    private boolean visited;
+
+    /**
+      * Constructs an uninitialized {@link MethodNode}. <i>Subclasses must not use this
+      * constructor</i>. Instead, they must use the {@link #MethodNode(int)} version.
+      *
+      * @throws IllegalStateException If a subclass calls this constructor.
+      */
+    public MethodNode() {
+        this(/* latest api = */ Opcodes.ASM9);
+        if (getClass() != MethodNode.class) {
+            throw new IllegalStateException();
+        }
+    }
+
+    /**
+      * Constructs an uninitialized {@link MethodNode}.
+      *
+      * @param api the ASM API version implemented by this visitor. Must be one of the {@code
+      *     ASM}<i>x</i> values in {@link Opcodes}.
+      */
+    public MethodNode(final int api) {
+        super(api);
+        this.instructions = new InsnList();
+    }
+
+    /**
+      * Constructs a new {@link MethodNode}. <i>Subclasses must not use this constructor</i>. Instead,
+      * they must use the {@link #MethodNode(int, int, String, String, String, String[])} version.
+      *
+      * @param access the method's access flags (see {@link Opcodes}). This parameter also indicates if
+      *     the method is synthetic and/or deprecated.
+      * @param name the method's name.
+      * @param descriptor the method's descriptor (see {@link Type}).
+      * @param signature the method's signature. May be {@literal null}.
+      * @param exceptions the internal names of the method's exception classes (see {@link
+      *     Type#getInternalName()}). May be {@literal null}.
+      * @throws IllegalStateException If a subclass calls this constructor.
+      */
+    public MethodNode(
+            final int access,
+            final String name,
+            final String descriptor,
+            final String signature,
+            final String[] exceptions) {
+        this(/* latest api = */ Opcodes.ASM9, access, name, descriptor, signature, exceptions);
+        if (getClass() != MethodNode.class) {
+            throw new IllegalStateException();
+        }
+    }
+
+    /**
+      * Constructs a new {@link MethodNode}.
+      *
+      * @param api the ASM API version implemented by this visitor. Must be one of the {@code
+      *     ASM}<i>x</i> values in {@link Opcodes}.
+      * @param access the method's access flags (see {@link Opcodes}). This parameter also indicates if
+      *     the method is synthetic and/or deprecated.
+      * @param name the method's name.
+      * @param descriptor the method's descriptor (see {@link Type}).
+      * @param signature the method's signature. May be {@literal null}.
+      * @param exceptions the internal names of the method's exception classes (see {@link
+      *     Type#getInternalName()}). May be {@literal null}.
+      */
+    public MethodNode(
+            final int api,
+            final int access,
+            final String name,
+            final String descriptor,
+            final String signature,
+            final String[] exceptions) {
+        super(api);
+        this.access = access;
+        this.name = name;
+        this.desc = descriptor;
+        this.signature = signature;
+        this.exceptions = Util.asArrayList(exceptions);
+        if ((access & Opcodes.ACC_ABSTRACT) == 0) {
+            this.localVariables = new ArrayList<>(5);
+        }
+        this.tryCatchBlocks = new ArrayList<>();
+        this.instructions = new InsnList();
+    }
+
+    // -----------------------------------------------------------------------------------------------
+    // Implementation of the MethodVisitor abstract class
+    // -----------------------------------------------------------------------------------------------
+
+    @Override
+    public void visitParameter(final String name, final int access) {
+        if (parameters == null) {
+            parameters = new ArrayList<>(5);
+        }
+        parameters.add(new ParameterNode(name, access));
+    }
+
+    @Override
+    @SuppressWarnings("serial")
+    public AnnotationVisitor visitAnnotationDefault() {
+        return new AnnotationNode(
+                new ArrayList<Object>(0) {
+                    @Override
+                    public boolean add(final Object o) {
+                        annotationDefault = o;
+                        return super.add(o);
+                    }
+                });
+    }
+
+    @Override
+    public AnnotationVisitor visitAnnotation(final String descriptor, final boolean visible) {
+        AnnotationNode annotation = new AnnotationNode(descriptor);
+        if (visible) {
+            visibleAnnotations = Util.add(visibleAnnotations, annotation);
+        } else {
+            invisibleAnnotations = Util.add(invisibleAnnotations, annotation);
+        }
+        return annotation;
+    }
+
+    @Override
+    public AnnotationVisitor visitTypeAnnotation(
+            final int typeRef, final TypePath typePath, final String descriptor, final boolean visible) {
+        TypeAnnotationNode typeAnnotation = new TypeAnnotationNode(typeRef, typePath, descriptor);
+        if (visible) {
+            visibleTypeAnnotations = Util.add(visibleTypeAnnotations, typeAnnotation);
+        } else {
+            invisibleTypeAnnotations = Util.add(invisibleTypeAnnotations, typeAnnotation);
+        }
+        return typeAnnotation;
+    }
+
+    @Override
+    public void visitAnnotableParameterCount(final int parameterCount, final boolean visible) {
+        if (visible) {
+            visibleAnnotableParameterCount = parameterCount;
+        } else {
+            invisibleAnnotableParameterCount = parameterCount;
+        }
+    }
+
+    @Override
+    @SuppressWarnings("unchecked")
+    public AnnotationVisitor visitParameterAnnotation(
+            final int parameter, final String descriptor, final boolean visible) {
+        AnnotationNode annotation = new AnnotationNode(descriptor);
+        if (visible) {
+            if (visibleParameterAnnotations == null) {
+                int params = Type.getArgumentCount(desc);
+                visibleParameterAnnotations = (List<AnnotationNode>[]) new List<?>[params];
+            }
+            visibleParameterAnnotations[parameter] =
+                    Util.add(visibleParameterAnnotations[parameter], annotation);
+        } else {
+            if (invisibleParameterAnnotations == null) {
+                int params = Type.getArgumentCount(desc);
+                invisibleParameterAnnotations = (List<AnnotationNode>[]) new List<?>[params];
+            }
+            invisibleParameterAnnotations[parameter] =
+                    Util.add(invisibleParameterAnnotations[parameter], annotation);
+        }
+        return annotation;
+    }
+
+    @Override
+    public void visitAttribute(final Attribute attribute) {
+        attrs = Util.add(attrs, attribute);
+    }
+
+    @Override
+    public void visitCode() {
+        // Nothing to do.
+    }
+
+    @Override
+    public void visitFrame(
+            final int type,
+            final int numLocal,
+            final Object[] local,
+            final int numStack,
+            final Object[] stack) {
+        instructions.add(
+                new FrameNode(
+                        type,
+                        numLocal,
+                        local == null ? null : getLabelNodes(local),
+                        numStack,
+                        stack == null ? null : getLabelNodes(stack)));
+    }
+
+    @Override
+    public void visitInsn(final int opcode) {
+        instructions.add(new InsnNode(opcode));
+    }
+
+    @Override
+    public void visitIntInsn(final int opcode, final int operand) {
+        instructions.add(new IntInsnNode(opcode, operand));
+    }
+
+    @Override
+    public void visitVarInsn(final int opcode, final int varIndex) {
+        instructions.add(new VarInsnNode(opcode, varIndex));
+    }
+
+    @Override
+    public void visitTypeInsn(final int opcode, final String type) {
+        instructions.add(new TypeInsnNode(opcode, type));
+    }
+
+    @Override
+    public void visitFieldInsn(
+            final int opcode, final String owner, final String name, final String descriptor) {
+        instructions.add(new FieldInsnNode(opcode, owner, name, descriptor));
+    }
+
+    @Override
+    public void visitMethodInsn(
+            final int opcodeAndSource,
+            final String owner,
+            final String name,
+            final String descriptor,
+            final boolean isInterface) {
+        if (api < Opcodes.ASM5 && (opcodeAndSource & Opcodes.SOURCE_DEPRECATED) == 0) {
+            // Redirect the call to the deprecated version of this method.
+            super.visitMethodInsn(opcodeAndSource, owner, name, descriptor, isInterface);
+            return;
+        }
+        int opcode = opcodeAndSource & ~Opcodes.SOURCE_MASK;
+
+        instructions.add(new MethodInsnNode(opcode, owner, name, descriptor, isInterface));
+    }
+
+    @Override
+    public void visitInvokeDynamicInsn(
+            final String name,
+            final String descriptor,
+            final Handle bootstrapMethodHandle,
+            final Object... bootstrapMethodArguments) {
+        instructions.add(
+                new InvokeDynamicInsnNode(
+                        name, descriptor, bootstrapMethodHandle, bootstrapMethodArguments));
+    }
+
+    @Override
+    public void visitJumpInsn(final int opcode, final Label label) {
+        instructions.add(new JumpInsnNode(opcode, getLabelNode(label)));
+    }
+
+    @Override
+    public void visitLabel(final Label label) {
+        instructions.add(getLabelNode(label));
+    }
+
+    @Override
+    public void visitLdcInsn(final Object value) {
+        instructions.add(new LdcInsnNode(value));
+    }
+
+    @Override
+    public void visitIincInsn(final int varIndex, final int increment) {
+        instructions.add(new IincInsnNode(varIndex, increment));
+    }
+
+    @Override
+    public void visitTableSwitchInsn(
+            final int min, final int max, final Label dflt, final Label... labels) {
+        instructions.add(new TableSwitchInsnNode(min, max, getLabelNode(dflt), getLabelNodes(labels)));
+    }
+
+    @Override
+    public void visitLookupSwitchInsn(final Label dflt, final int[] keys, final Label[] labels) {
+        instructions.add(new LookupSwitchInsnNode(getLabelNode(dflt), keys, getLabelNodes(labels)));
+    }
+
+    @Override
+    public void visitMultiANewArrayInsn(final String descriptor, final int numDimensions) {
+        instructions.add(new MultiANewArrayInsnNode(descriptor, numDimensions));
+    }
+
+    @Override
+    public AnnotationVisitor visitInsnAnnotation(
+            final int typeRef, final TypePath typePath, final String descriptor, final boolean visible) {
+        // Find the last real instruction, i.e. the instruction targeted by this annotation.
+        AbstractInsnNode currentInsn = instructions.getLast();
+        while (currentInsn.getOpcode() == -1) {
+            currentInsn = currentInsn.getPrevious();
+        }
+        // Add the annotation to this instruction.
+        TypeAnnotationNode typeAnnotation = new TypeAnnotationNode(typeRef, typePath, descriptor);
+        if (visible) {
+            currentInsn.visibleTypeAnnotations =
+                    Util.add(currentInsn.visibleTypeAnnotations, typeAnnotation);
+        } else {
+            currentInsn.invisibleTypeAnnotations =
+                    Util.add(currentInsn.invisibleTypeAnnotations, typeAnnotation);
+        }
+        return typeAnnotation;
+    }
+
+    @Override
+    public void visitTryCatchBlock(
+            final Label start, final Label end, final Label handler, final String type) {
+        TryCatchBlockNode tryCatchBlock =
+                new TryCatchBlockNode(getLabelNode(start), getLabelNode(end), getLabelNode(handler), type);
+        tryCatchBlocks = Util.add(tryCatchBlocks, tryCatchBlock);
+    }
+
+    @Override
+    public AnnotationVisitor visitTryCatchAnnotation(
+            final int typeRef, final TypePath typePath, final String descriptor, final boolean visible) {
+        TryCatchBlockNode tryCatchBlock = tryCatchBlocks.get((typeRef & 0x00FFFF00) >> 8);
+        TypeAnnotationNode typeAnnotation = new TypeAnnotationNode(typeRef, typePath, descriptor);
+        if (visible) {
+            tryCatchBlock.visibleTypeAnnotations =
+                    Util.add(tryCatchBlock.visibleTypeAnnotations, typeAnnotation);
+        } else {
+            tryCatchBlock.invisibleTypeAnnotations =
+                    Util.add(tryCatchBlock.invisibleTypeAnnotations, typeAnnotation);
+        }
+        return typeAnnotation;
+    }
+
+    @Override
+    public void visitLocalVariable(
+            final String name,
+            final String descriptor,
+            final String signature,
+            final Label start,
+            final Label end,
+            final int index) {
+        LocalVariableNode localVariable =
+                new LocalVariableNode(
+                        name, descriptor, signature, getLabelNode(start), getLabelNode(end), index);
+        localVariables = Util.add(localVariables, localVariable);
+    }
+
+    @Override
+    public AnnotationVisitor visitLocalVariableAnnotation(
+            final int typeRef,
+            final TypePath typePath,
+            final Label[] start,
+            final Label[] end,
+            final int[] index,
+            final String descriptor,
+            final boolean visible) {
+        LocalVariableAnnotationNode localVariableAnnotation =
+                new LocalVariableAnnotationNode(
+                        typeRef, typePath, getLabelNodes(start), getLabelNodes(end), index, descriptor);
+        if (visible) {
+            visibleLocalVariableAnnotations =
+                    Util.add(visibleLocalVariableAnnotations, localVariableAnnotation);
+        } else {
+            invisibleLocalVariableAnnotations =
+                    Util.add(invisibleLocalVariableAnnotations, localVariableAnnotation);
+        }
+        return localVariableAnnotation;
+    }
+
+    @Override
+    public void visitLineNumber(final int line, final Label start) {
+        instructions.add(new LineNumberNode(line, getLabelNode(start)));
+    }
+
+    @Override
+    public void visitMaxs(final int maxStack, final int maxLocals) {
+        this.maxStack = maxStack;
+        this.maxLocals = maxLocals;
+    }
+
+    @Override
+    public void visitEnd() {
+        // Nothing to do.
+    }
+
+    /**
+      * Returns the LabelNode corresponding to the given Label. Creates a new LabelNode if necessary.
+      * The default implementation of this method uses the {@link Label#info} field to store
+      * associations between labels and label nodes.
+      *
+      * @param label a Label.
+      * @return the LabelNode corresponding to label.
+      */
+    protected LabelNode getLabelNode(final Label label) {
+        if (!(label.info instanceof LabelNode)) {
+            label.info = new LabelNode();
+        }
+        return (LabelNode) label.info;
+    }
+
+    private LabelNode[] getLabelNodes(final Label[] labels) {
+        LabelNode[] labelNodes = new LabelNode[labels.length];
+        for (int i = 0, n = labels.length; i < n; ++i) {
+            labelNodes[i] = getLabelNode(labels[i]);
+        }
+        return labelNodes;
+    }
+
+    private Object[] getLabelNodes(final Object[] objects) {
+        Object[] labelNodes = new Object[objects.length];
+        for (int i = 0, n = objects.length; i < n; ++i) {
+            Object o = objects[i];
+            if (o instanceof Label) {
+                o = getLabelNode((Label) o);
+            }
+            labelNodes[i] = o;
+        }
+        return labelNodes;
+    }
+
+    // -----------------------------------------------------------------------------------------------
+    // Accept method
+    // -----------------------------------------------------------------------------------------------
+
+    /**
+      * Checks that this method node is compatible with the given ASM API version. This method checks
+      * that this node, and all its children recursively, do not contain elements that were introduced
+      * in more recent versions of the ASM API than the given version.
+      *
+      * @param api an ASM API version. Must be one of the {@code ASM}<i>x</i> values in {@link
+      *     Opcodes}.
+      */
+    public void check(final int api) {
+        if (api == Opcodes.ASM4) {
+            if (parameters != null && !parameters.isEmpty()) {
+                throw new UnsupportedClassVersionException();
+            }
+            if (visibleTypeAnnotations != null && !visibleTypeAnnotations.isEmpty()) {
+                throw new UnsupportedClassVersionException();
+            }
+            if (invisibleTypeAnnotations != null && !invisibleTypeAnnotations.isEmpty()) {
+                throw new UnsupportedClassVersionException();
+            }
+            if (tryCatchBlocks != null) {
+                for (int i = tryCatchBlocks.size() - 1; i >= 0; --i) {
+                    TryCatchBlockNode tryCatchBlock = tryCatchBlocks.get(i);
+                    if (tryCatchBlock.visibleTypeAnnotations != null
+                            && !tryCatchBlock.visibleTypeAnnotations.isEmpty()) {
+                        throw new UnsupportedClassVersionException();
+                    }
+                    if (tryCatchBlock.invisibleTypeAnnotations != null
+                            && !tryCatchBlock.invisibleTypeAnnotations.isEmpty()) {
+                        throw new UnsupportedClassVersionException();
+                    }
+                }
+            }
+            for (int i = instructions.size() - 1; i >= 0; --i) {
+                AbstractInsnNode insn = instructions.get(i);
+                if (insn.visibleTypeAnnotations != null && !insn.visibleTypeAnnotations.isEmpty()) {
+                    throw new UnsupportedClassVersionException();
+                }
+                if (insn.invisibleTypeAnnotations != null && !insn.invisibleTypeAnnotations.isEmpty()) {
+                    throw new UnsupportedClassVersionException();
+                }
+                if (insn instanceof MethodInsnNode) {
+                    boolean isInterface = ((MethodInsnNode) insn).itf;
+                    if (isInterface != (insn.opcode == Opcodes.INVOKEINTERFACE)) {
+                        throw new UnsupportedClassVersionException();
+                    }
+                } else if (insn instanceof LdcInsnNode) {
+                    Object value = ((LdcInsnNode) insn).cst;
+                    if (value instanceof Handle
+                            || (value instanceof Type && ((Type) value).getSort() == Type.METHOD)) {
+                        throw new UnsupportedClassVersionException();
+                    }
+                }
+            }
+            if (visibleLocalVariableAnnotations != null && !visibleLocalVariableAnnotations.isEmpty()) {
+                throw new UnsupportedClassVersionException();
+            }
+            if (invisibleLocalVariableAnnotations != null
+                    && !invisibleLocalVariableAnnotations.isEmpty()) {
+                throw new UnsupportedClassVersionException();
+            }
+        }
+        if (api < Opcodes.ASM7) {
+            for (int i = instructions.size() - 1; i >= 0; --i) {
+                AbstractInsnNode insn = instructions.get(i);
+                if (insn instanceof LdcInsnNode) {
+                    Object value = ((LdcInsnNode) insn).cst;
+                    if (value instanceof ConstantDynamic) {
+                        throw new UnsupportedClassVersionException();
+                    }
+                }
+            }
+        }
+    }
+
+    /**
+      * Makes the given class visitor visit this method.
+      *
+      * @param classVisitor a class visitor.
+      */
+    public void accept(final ClassVisitor classVisitor) {
+        String[] exceptionsArray = exceptions == null ? null : exceptions.toArray(new String[0]);
+        MethodVisitor methodVisitor =
+                classVisitor.visitMethod(access, name, desc, signature, exceptionsArray);
+        if (methodVisitor != null) {
+            accept(methodVisitor);
+        }
+    }
+
+    /**
+      * Makes the given method visitor visit this method.
+      *
+      * @param methodVisitor a method visitor.
+      */
+    public void accept(final MethodVisitor methodVisitor) {
+        // Visit the parameters.
+        if (parameters != null) {
+            for (int i = 0, n = parameters.size(); i < n; i++) {
+                parameters.get(i).accept(methodVisitor);
+            }
+        }
+        // Visit the annotations.
+        if (annotationDefault != null) {
+            AnnotationVisitor annotationVisitor = methodVisitor.visitAnnotationDefault();
+            AnnotationNode.accept(annotationVisitor, null, annotationDefault);
+            if (annotationVisitor != null) {
+                annotationVisitor.visitEnd();
+            }
+        }
+        if (visibleAnnotations != null) {
+            for (int i = 0, n = visibleAnnotations.size(); i < n; ++i) {
+                AnnotationNode annotation = visibleAnnotations.get(i);
+                annotation.accept(methodVisitor.visitAnnotation(annotation.desc, true));
+            }
+        }
+        if (invisibleAnnotations != null) {
+            for (int i = 0, n = invisibleAnnotations.size(); i < n; ++i) {
+                AnnotationNode annotation = invisibleAnnotations.get(i);
+                annotation.accept(methodVisitor.visitAnnotation(annotation.desc, false));
+            }
+        }
+        if (visibleTypeAnnotations != null) {
+            for (int i = 0, n = visibleTypeAnnotations.size(); i < n; ++i) {
+                TypeAnnotationNode typeAnnotation = visibleTypeAnnotations.get(i);
+                typeAnnotation.accept(
+                        methodVisitor.visitTypeAnnotation(
+                                typeAnnotation.typeRef, typeAnnotation.typePath, typeAnnotation.desc, true));
+            }
+        }
+        if (invisibleTypeAnnotations != null) {
+            for (int i = 0, n = invisibleTypeAnnotations.size(); i < n; ++i) {
+                TypeAnnotationNode typeAnnotation = invisibleTypeAnnotations.get(i);
+                typeAnnotation.accept(
+                        methodVisitor.visitTypeAnnotation(
+                                typeAnnotation.typeRef, typeAnnotation.typePath, typeAnnotation.desc, false));
+            }
+        }
+        if (visibleAnnotableParameterCount > 0) {
+            methodVisitor.visitAnnotableParameterCount(visibleAnnotableParameterCount, true);
+        }
+        if (visibleParameterAnnotations != null) {
+            for (int i = 0, n = visibleParameterAnnotations.length; i < n; ++i) {
+                List<AnnotationNode> parameterAnnotations = visibleParameterAnnotations[i];
+                if (parameterAnnotations == null) {
+                    continue;
+                }
+                for (int j = 0, m = parameterAnnotations.size(); j < m; ++j) {
+                    AnnotationNode annotation = parameterAnnotations.get(j);
+                    annotation.accept(methodVisitor.visitParameterAnnotation(i, annotation.desc, true));
+                }
+            }
+        }
+        if (invisibleAnnotableParameterCount > 0) {
+            methodVisitor.visitAnnotableParameterCount(invisibleAnnotableParameterCount, false);
+        }
+        if (invisibleParameterAnnotations != null) {
+            for (int i = 0, n = invisibleParameterAnnotations.length; i < n; ++i) {
+                List<AnnotationNode> parameterAnnotations = invisibleParameterAnnotations[i];
+                if (parameterAnnotations == null) {
+                    continue;
+                }
+                for (int j = 0, m = parameterAnnotations.size(); j < m; ++j) {
+                    AnnotationNode annotation = parameterAnnotations.get(j);
+                    annotation.accept(methodVisitor.visitParameterAnnotation(i, annotation.desc, false));
+                }
+            }
+        }
+        // Visit the non standard attributes.
+        if (visited) {
+            instructions.resetLabels();
+        }
+        if (attrs != null) {
+            for (int i = 0, n = attrs.size(); i < n; ++i) {
+                methodVisitor.visitAttribute(attrs.get(i));
+            }
+        }
+        // Visit the code.
+        if (instructions.size() > 0) {
+            methodVisitor.visitCode();
+            // Visits the try catch blocks.
+            if (tryCatchBlocks != null) {
+                for (int i = 0, n = tryCatchBlocks.size(); i < n; ++i) {
+                    tryCatchBlocks.get(i).updateIndex(i);
+                    tryCatchBlocks.get(i).accept(methodVisitor);
+                }
+            }
+            // Visit the instructions.
+            instructions.accept(methodVisitor);
+            // Visits the local variables.
+            if (localVariables != null) {
+                for (int i = 0, n = localVariables.size(); i < n; ++i) {
+                    localVariables.get(i).accept(methodVisitor);
+                }
+            }
+            // Visits the local variable annotations.
+            if (visibleLocalVariableAnnotations != null) {
+                for (int i = 0, n = visibleLocalVariableAnnotations.size(); i < n; ++i) {
+                    visibleLocalVariableAnnotations.get(i).accept(methodVisitor, true);
+                }
+            }
+            if (invisibleLocalVariableAnnotations != null) {
+                for (int i = 0, n = invisibleLocalVariableAnnotations.size(); i < n; ++i) {
+                    invisibleLocalVariableAnnotations.get(i).accept(methodVisitor, false);
+                }
+            }
+            methodVisitor.visitMaxs(maxStack, maxLocals);
+            visited = true;
+        }
+        methodVisitor.visitEnd();
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/org/objectweb/asm/tree/ModuleExportNode.class b/tests/test_data/std/jdk/internal/org/objectweb/asm/tree/ModuleExportNode.class
new file mode 100644
index 0000000000000000000000000000000000000000..35cdceb48d065030f294b5585029260c77e39dbf
GIT binary patch
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/org/objectweb/asm/tree/ModuleExportNode.java b/tests/test_data/std/jdk/internal/org/objectweb/asm/tree/ModuleExportNode.java
new file mode 100644
index 00000000..b845ebe6
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/org/objectweb/asm/tree/ModuleExportNode.java
@@ -0,0 +1,115 @@
+/*
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/*
+ * This file is available under and governed by the GNU General Public
+ * License version 2 only, as published by the Free Software Foundation.
+ * However, the following notice accompanied the original version of this
+ * file:
+ *
+ * ASM: a very small and fast Java bytecode manipulation framework
+ * Copyright (c) 2000-2011 INRIA, France Telecom
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the copyright holders nor the names of its
+ *    contributors may be used to endorse or promote products derived from
+ *    this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+package jdk.internal.org.objectweb.asm.tree;
+
+import java.util.List;
+import jdk.internal.org.objectweb.asm.ModuleVisitor;
+
+/**
+ * A node that represents an exported package with its name and the module that can access to it.
+ *
+ * @author Remi Forax
+ */
+public class ModuleExportNode {
+
+    /**
+      * The internal name of the exported package (see {@link
+      * jdk.internal.org.objectweb.asm.Type#getInternalName()}).
+      */
+    public String packaze;
+
+    /**
+      * The access flags (see {@link jdk.internal.org.objectweb.asm.Opcodes}). Valid values are {@code
+      * ACC_SYNTHETIC} and {@code ACC_MANDATED}.
+      */
+    public int access;
+
+    /**
+      * The list of modules that can access this exported package, specified with fully qualified names
+      * (using dots). May be {@literal null}.
+      */
+    public List<String> modules;
+
+    /**
+      * Constructs a new {@link ModuleExportNode}.
+      *
+      * @param packaze the internal name of the exported package (see {@link
+      *     jdk.internal.org.objectweb.asm.Type#getInternalName()}).
+      * @param access the package access flags, one or more of {@code ACC_SYNTHETIC} and {@code
+      *     ACC_MANDATED}.
+      * @param modules a list of modules that can access this exported package, specified with fully
+      *     qualified names (using dots).
+      */
+    public ModuleExportNode(final String packaze, final int access, final List<String> modules) {
+        this.packaze = packaze;
+        this.access = access;
+        this.modules = modules;
+    }
+
+    /**
+      * Makes the given module visitor visit this export declaration.
+      *
+      * @param moduleVisitor a module visitor.
+      */
+    public void accept(final ModuleVisitor moduleVisitor) {
+        moduleVisitor.visitExport(
+                packaze, access, modules == null ? null : modules.toArray(new String[0]));
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/org/objectweb/asm/tree/ModuleNode.class b/tests/test_data/std/jdk/internal/org/objectweb/asm/tree/ModuleNode.class
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HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/org/objectweb/asm/tree/ModuleNode.java b/tests/test_data/std/jdk/internal/org/objectweb/asm/tree/ModuleNode.java
new file mode 100644
index 00000000..66baee92
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/org/objectweb/asm/tree/ModuleNode.java
@@ -0,0 +1,277 @@
+/*
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/*
+ * This file is available under and governed by the GNU General Public
+ * License version 2 only, as published by the Free Software Foundation.
+ * However, the following notice accompanied the original version of this
+ * file:
+ *
+ * ASM: a very small and fast Java bytecode manipulation framework
+ * Copyright (c) 2000-2011 INRIA, France Telecom
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the copyright holders nor the names of its
+ *    contributors may be used to endorse or promote products derived from
+ *    this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+package jdk.internal.org.objectweb.asm.tree;
+
+import java.util.ArrayList;
+import java.util.List;
+import jdk.internal.org.objectweb.asm.ClassVisitor;
+import jdk.internal.org.objectweb.asm.ModuleVisitor;
+import jdk.internal.org.objectweb.asm.Opcodes;
+
+/**
+ * A node that represents a module declaration.
+ *
+ * @author Remi Forax
+ */
+public class ModuleNode extends ModuleVisitor {
+
+    /** The fully qualified name (using dots) of this module. */
+    public String name;
+
+    /**
+      * The module's access flags, among {@code ACC_OPEN}, {@code ACC_SYNTHETIC} and {@code
+      * ACC_MANDATED}.
+      */
+    public int access;
+
+    /** The version of this module. May be {@literal null}. */
+    public String version;
+
+    /**
+      * The internal name of the main class of this module (see {@link
+      * jdk.internal.org.objectweb.asm.Type#getInternalName()}). May be {@literal null}.
+      */
+    public String mainClass;
+
+    /**
+      * The internal name of the packages declared by this module (see {@link
+      * jdk.internal.org.objectweb.asm.Type#getInternalName()}). May be {@literal null}.
+      */
+    public List<String> packages;
+
+    /** The dependencies of this module. May be {@literal null}. */
+    public List<ModuleRequireNode> requires;
+
+    /** The packages exported by this module. May be {@literal null}. */
+    public List<ModuleExportNode> exports;
+
+    /** The packages opened by this module. May be {@literal null}. */
+    public List<ModuleOpenNode> opens;
+
+    /**
+      * The internal names of the services used by this module (see {@link
+      * jdk.internal.org.objectweb.asm.Type#getInternalName()}). May be {@literal null}.
+      */
+    public List<String> uses;
+
+    /** The services provided by this module. May be {@literal null}. */
+    public List<ModuleProvideNode> provides;
+
+    /**
+      * Constructs a {@link ModuleNode}. <i>Subclasses must not use this constructor</i>. Instead, they
+      * must use the {@link #ModuleNode(int,String,int,String,List,List,List,List,List)} version.
+      *
+      * @param name the fully qualified name (using dots) of the module.
+      * @param access the module access flags, among {@code ACC_OPEN}, {@code ACC_SYNTHETIC} and {@code
+      *     ACC_MANDATED}.
+      * @param version the module version, or {@literal null}.
+      * @throws IllegalStateException If a subclass calls this constructor.
+      */
+    public ModuleNode(final String name, final int access, final String version) {
+        super(/* latest api = */ Opcodes.ASM9);
+        if (getClass() != ModuleNode.class) {
+            throw new IllegalStateException();
+        }
+        this.name = name;
+        this.access = access;
+        this.version = version;
+    }
+
+    // TODO(forax): why is there no 'mainClass' and 'packages' parameters in this constructor?
+    /**
+      * Constructs a {@link ModuleNode}.
+      *
+      * @param api the ASM API version implemented by this visitor. Must be one of {@link
+      *     Opcodes#ASM6}, {@link Opcodes#ASM7}, {@link Opcodes#ASM8} or {@link Opcodes#ASM9}.
+      * @param name the fully qualified name (using dots) of the module.
+      * @param access the module access flags, among {@code ACC_OPEN}, {@code ACC_SYNTHETIC} and {@code
+      *     ACC_MANDATED}.
+      * @param version the module version, or {@literal null}.
+      * @param requires The dependencies of this module. May be {@literal null}.
+      * @param exports The packages exported by this module. May be {@literal null}.
+      * @param opens The packages opened by this module. May be {@literal null}.
+      * @param uses The internal names of the services used by this module (see {@link
+      *     jdk.internal.org.objectweb.asm.Type#getInternalName()}). May be {@literal null}.
+      * @param provides The services provided by this module. May be {@literal null}.
+      */
+    public ModuleNode(
+            final int api,
+            final String name,
+            final int access,
+            final String version,
+            final List<ModuleRequireNode> requires,
+            final List<ModuleExportNode> exports,
+            final List<ModuleOpenNode> opens,
+            final List<String> uses,
+            final List<ModuleProvideNode> provides) {
+        super(api);
+        this.name = name;
+        this.access = access;
+        this.version = version;
+        this.requires = requires;
+        this.exports = exports;
+        this.opens = opens;
+        this.uses = uses;
+        this.provides = provides;
+    }
+
+    @Override
+    public void visitMainClass(final String mainClass) {
+        this.mainClass = mainClass;
+    }
+
+    @Override
+    public void visitPackage(final String packaze) {
+        if (packages == null) {
+            packages = new ArrayList<>(5);
+        }
+        packages.add(packaze);
+    }
+
+    @Override
+    public void visitRequire(final String module, final int access, final String version) {
+        if (requires == null) {
+            requires = new ArrayList<>(5);
+        }
+        requires.add(new ModuleRequireNode(module, access, version));
+    }
+
+    @Override
+    public void visitExport(final String packaze, final int access, final String... modules) {
+        if (exports == null) {
+            exports = new ArrayList<>(5);
+        }
+        exports.add(new ModuleExportNode(packaze, access, Util.asArrayList(modules)));
+    }
+
+    @Override
+    public void visitOpen(final String packaze, final int access, final String... modules) {
+        if (opens == null) {
+            opens = new ArrayList<>(5);
+        }
+        opens.add(new ModuleOpenNode(packaze, access, Util.asArrayList(modules)));
+    }
+
+    @Override
+    public void visitUse(final String service) {
+        if (uses == null) {
+            uses = new ArrayList<>(5);
+        }
+        uses.add(service);
+    }
+
+    @Override
+    public void visitProvide(final String service, final String... providers) {
+        if (provides == null) {
+            provides = new ArrayList<>(5);
+        }
+        provides.add(new ModuleProvideNode(service, Util.asArrayList(providers)));
+    }
+
+    @Override
+    public void visitEnd() {
+        // Nothing to do.
+    }
+
+    /**
+      * Makes the given class visitor visit this module.
+      *
+      * @param classVisitor a class visitor.
+      */
+    public void accept(final ClassVisitor classVisitor) {
+        ModuleVisitor moduleVisitor = classVisitor.visitModule(name, access, version);
+        if (moduleVisitor == null) {
+            return;
+        }
+        if (mainClass != null) {
+            moduleVisitor.visitMainClass(mainClass);
+        }
+        if (packages != null) {
+            for (int i = 0, n = packages.size(); i < n; i++) {
+                moduleVisitor.visitPackage(packages.get(i));
+            }
+        }
+        if (requires != null) {
+            for (int i = 0, n = requires.size(); i < n; i++) {
+                requires.get(i).accept(moduleVisitor);
+            }
+        }
+        if (exports != null) {
+            for (int i = 0, n = exports.size(); i < n; i++) {
+                exports.get(i).accept(moduleVisitor);
+            }
+        }
+        if (opens != null) {
+            for (int i = 0, n = opens.size(); i < n; i++) {
+                opens.get(i).accept(moduleVisitor);
+            }
+        }
+        if (uses != null) {
+            for (int i = 0, n = uses.size(); i < n; i++) {
+                moduleVisitor.visitUse(uses.get(i));
+            }
+        }
+        if (provides != null) {
+            for (int i = 0, n = provides.size(); i < n; i++) {
+                provides.get(i).accept(moduleVisitor);
+            }
+        }
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/org/objectweb/asm/tree/ModuleOpenNode.class b/tests/test_data/std/jdk/internal/org/objectweb/asm/tree/ModuleOpenNode.class
new file mode 100644
index 0000000000000000000000000000000000000000..e6a3c4488d6e4a0571764631c5c71b057e414cd3
GIT binary patch
literal 1296
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zAK<eIXf)CIX5x<$@9egG*?>ND=k96Gx#!-wx4(XW{SIIakJB)a;7FRdf<A_kZLueu
zhVbgnR&`stAw%Da@>ICWkgy7s6#9|kNShdd$*{Ct+i{c^%D@v1#}Dd`AF<xZsv}yv
zP8dk(Z1}ZyLvA&tx9Qg;18)j<N4%vdQ#wgk4g=-Yi#oxOiD8UTX5qTB)nZ`l8qS!=
zVvP8^ks#qCF~1$EhEr0lu*i`+Q$s8|fNQwUal^z-OfU>ZNsmb+82V3xK<qPE){9e?
z;tmuGJur@24B69Pbo{3=g=vmEChlT}VeXO!#l5MhmJ0oVA+@I?-71EHb;?RdeZ5D<
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z$5*uQe-aFX<&frmLo_=bN|*h1;L2x8_b?kL>@LTG9!*Tsup6|V2{6586fwOJ(McOX
zZ}%uRkf#r$y}eJTMaVlklXQ;RpTX?eLvVZI5QFyoAx1wEo<M<~Ibr}V{j!D>B!=*k
z_Noq>P&?*h7IXAQN>P3mMcRROHKw<awB{)`DSwRQ35i`T5a!?kJ+-Izlufg&S^I$e
z9FUy@jQ#{?ACT2y;v2@l;HrTinEZs>Cq6Tg7oR*fF$15fd>whr#d^mcEi7V*vOT0M
k^DvIcoWar0X%Xp<ZHi-@9Z~zbSh9n0OcH6CNCqDL0roaI>Hq)$

literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/org/objectweb/asm/tree/ModuleOpenNode.java b/tests/test_data/std/jdk/internal/org/objectweb/asm/tree/ModuleOpenNode.java
new file mode 100644
index 00000000..abe48f59
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/org/objectweb/asm/tree/ModuleOpenNode.java
@@ -0,0 +1,114 @@
+/*
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/*
+ * This file is available under and governed by the GNU General Public
+ * License version 2 only, as published by the Free Software Foundation.
+ * However, the following notice accompanied the original version of this
+ * file:
+ *
+ * ASM: a very small and fast Java bytecode manipulation framework
+ * Copyright (c) 2000-2011 INRIA, France Telecom
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the copyright holders nor the names of its
+ *    contributors may be used to endorse or promote products derived from
+ *    this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+package jdk.internal.org.objectweb.asm.tree;
+
+import java.util.List;
+import jdk.internal.org.objectweb.asm.ModuleVisitor;
+
+/**
+ * A node that represents an opened package with its name and the module that can access it.
+ *
+ * @author Remi Forax
+ */
+public class ModuleOpenNode {
+
+    /**
+      * The internal name of the opened package (see {@link jdk.internal.org.objectweb.asm.Type#getInternalName()}).
+      */
+    public String packaze;
+
+    /**
+      * The access flag of the opened package, valid values are among {@code ACC_SYNTHETIC} and {@code
+      * ACC_MANDATED}.
+      */
+    public int access;
+
+    /**
+      * The fully qualified names (using dots) of the modules that can use deep reflection to the
+      * classes of the open package, or {@literal null}.
+      */
+    public List<String> modules;
+
+    /**
+      * Constructs a new {@link ModuleOpenNode}.
+      *
+      * @param packaze the internal name of the opened package (see {@link
+      *     jdk.internal.org.objectweb.asm.Type#getInternalName()}).
+      * @param access the access flag of the opened package, valid values are among {@code
+      *     ACC_SYNTHETIC} and {@code ACC_MANDATED}.
+      * @param modules the fully qualified names (using dots) of the modules that can use deep
+      *     reflection to the classes of the open package, or {@literal null}.
+      */
+    public ModuleOpenNode(final String packaze, final int access, final List<String> modules) {
+        this.packaze = packaze;
+        this.access = access;
+        this.modules = modules;
+    }
+
+    /**
+      * Makes the given module visitor visit this opened package.
+      *
+      * @param moduleVisitor a module visitor.
+      */
+    public void accept(final ModuleVisitor moduleVisitor) {
+        moduleVisitor.visitOpen(
+                packaze, access, modules == null ? null : modules.toArray(new String[0]));
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/org/objectweb/asm/tree/ModuleProvideNode.class b/tests/test_data/std/jdk/internal/org/objectweb/asm/tree/ModuleProvideNode.class
new file mode 100644
index 0000000000000000000000000000000000000000..0872490cdfa1ec064bd233e5512666c20ab9ce4c
GIT binary patch
literal 1167
zcmb7EU2hUW6g{(0R_IbHRV;qC+A3eN_Q4oK)5J9K32P08sC`<N2@YL$$*^GhvrJlz
zCK{jpQN}y7h|m&=FL&<T*?Z2Jd++SeUthli*vC!^24W`S7M74;SnWC^$Mzh*W4~;5
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z?K$Y@GHVJtzOOr!sSBSU40|muUpp;NcPellujxpk_TykYd@raqPwES9K7SBMR<1sS
zdeZ-c{B*J2xi?jJNI0&``!u^d1oH0*ooR_KK)R>rb<(Bk|3NUM8o^My{JBt7%UziM
zsv1aa(vTbU1Pw6tl*nUh;>m96=v{rXgnP7ZQRJA`7_FJoXRuQF3}&fvhV(}Y#js5_
zi#XXgWZxo*cUZv@?o(tVO2Y#bXh#5=j%iO38Yq%)5wSYUKoLh0N)#)jLRJZQMaW8U
zzFayb@>8T^-*EX0)(reW{u6E}DTbD!{waWqb+omFT$DJGkjFz*36{auIgfq=YzQkx

literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/org/objectweb/asm/tree/ModuleProvideNode.java b/tests/test_data/std/jdk/internal/org/objectweb/asm/tree/ModuleProvideNode.java
new file mode 100644
index 00000000..d48239f5
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/org/objectweb/asm/tree/ModuleProvideNode.java
@@ -0,0 +1,101 @@
+/*
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/*
+ * This file is available under and governed by the GNU General Public
+ * License version 2 only, as published by the Free Software Foundation.
+ * However, the following notice accompanied the original version of this
+ * file:
+ *
+ * ASM: a very small and fast Java bytecode manipulation framework
+ * Copyright (c) 2000-2011 INRIA, France Telecom
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the copyright holders nor the names of its
+ *    contributors may be used to endorse or promote products derived from
+ *    this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+package jdk.internal.org.objectweb.asm.tree;
+
+import java.util.List;
+import jdk.internal.org.objectweb.asm.ModuleVisitor;
+
+/**
+ * A node that represents a service and its implementation provided by the current module.
+ *
+ * @author Remi Forax
+ */
+public class ModuleProvideNode {
+
+    /** The internal name of the service (see {@link jdk.internal.org.objectweb.asm.Type#getInternalName()}). */
+    public String service;
+
+    /**
+      * The internal names of the implementations of the service (there is at least one provider). See
+      * {@link jdk.internal.org.objectweb.asm.Type#getInternalName()}.
+      */
+    public List<String> providers;
+
+    /**
+      * Constructs a new {@link ModuleProvideNode}.
+      *
+      * @param service the internal name of the service.
+      * @param providers the internal names of the implementations of the service (there is at least
+      *     one provider). See {@link jdk.internal.org.objectweb.asm.Type#getInternalName()}.
+      */
+    public ModuleProvideNode(final String service, final List<String> providers) {
+        this.service = service;
+        this.providers = providers;
+    }
+
+    /**
+      * Makes the given module visitor visit this require declaration.
+      *
+      * @param moduleVisitor a module visitor.
+      */
+    public void accept(final ModuleVisitor moduleVisitor) {
+        moduleVisitor.visitProvide(service, providers.toArray(new String[0]));
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/org/objectweb/asm/tree/ModuleRequireNode.class b/tests/test_data/std/jdk/internal/org/objectweb/asm/tree/ModuleRequireNode.class
new file mode 100644
index 0000000000000000000000000000000000000000..397b2acfb266d17193995f9cb1af675369742564
GIT binary patch
literal 847
zcmb7DO>fgc5Pg%Rbral=q#?9WpkGL-3$-{P4ym|QLW&fML{TmUs*STsH#l~?cGBNf
zDFKNCKY$;Fm|aILsECTo?#_5--g`6SA3wi+2XKHVCFGEIP;fDWS;A6ZjD#PGsOP`!
z^kt9|X7^R3(pQ9heWzW-9EuJ~F7Ci3yy$m7`zlJMjzs9ky649>>q2&XkqrD)OX<If
zyTeevljlRF<zd{FTytQ3gi7lg@F>+P>NO0+f{R5gahwPOnIr^i8h6FTvVnC*QYR{o
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z9mPW($k)mUtYrYd4Rg;75F0$59B)(}WHy6eWF}~D9vR;`_RL_F&--kJY!~>hdS5}_
z?gWmvHo?62Y=ZKojefvqjWd8_j{JZkK4Jl%cmYnZ#$GSW$3r|~iz``NvM+;d*i_BB
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B#hU;C

literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/org/objectweb/asm/tree/ModuleRequireNode.java b/tests/test_data/std/jdk/internal/org/objectweb/asm/tree/ModuleRequireNode.java
new file mode 100644
index 00000000..319d7af2
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/org/objectweb/asm/tree/ModuleRequireNode.java
@@ -0,0 +1,105 @@
+/*
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/*
+ * This file is available under and governed by the GNU General Public
+ * License version 2 only, as published by the Free Software Foundation.
+ * However, the following notice accompanied the original version of this
+ * file:
+ *
+ * ASM: a very small and fast Java bytecode manipulation framework
+ * Copyright (c) 2000-2011 INRIA, France Telecom
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the copyright holders nor the names of its
+ *    contributors may be used to endorse or promote products derived from
+ *    this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+package jdk.internal.org.objectweb.asm.tree;
+
+import jdk.internal.org.objectweb.asm.ModuleVisitor;
+
+/**
+ * A node that represents a required module with its name and access of a module descriptor.
+ *
+ * @author Remi Forax
+ */
+public class ModuleRequireNode {
+
+    /** The fully qualified name (using dots) of the dependence. */
+    public String module;
+
+    /**
+      * The access flag of the dependence among {@code ACC_TRANSITIVE}, {@code ACC_STATIC_PHASE},
+      * {@code ACC_SYNTHETIC} and {@code ACC_MANDATED}.
+      */
+    public int access;
+
+    /** The module version at compile time, or {@literal null}. */
+    public String version;
+
+    /**
+      * Constructs a new {@link ModuleRequireNode}.
+      *
+      * @param module the fully qualified name (using dots) of the dependence.
+      * @param access the access flag of the dependence among {@code ACC_TRANSITIVE}, {@code
+      *     ACC_STATIC_PHASE}, {@code ACC_SYNTHETIC} and {@code ACC_MANDATED}.
+      * @param version the module version at compile time, or {@literal null}.
+      */
+    public ModuleRequireNode(final String module, final int access, final String version) {
+        this.module = module;
+        this.access = access;
+        this.version = version;
+    }
+
+    /**
+      * Makes the given module visitor visit this require directive.
+      *
+      * @param moduleVisitor a module visitor.
+      */
+    public void accept(final ModuleVisitor moduleVisitor) {
+        moduleVisitor.visitRequire(module, access, version);
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/org/objectweb/asm/tree/MultiANewArrayInsnNode.class b/tests/test_data/std/jdk/internal/org/objectweb/asm/tree/MultiANewArrayInsnNode.class
new file mode 100644
index 0000000000000000000000000000000000000000..673402f979ed3af3c10ec87b9b8776d75ebf739f
GIT binary patch
literal 1727
zcmcIkT~8B16g|@xDs@YtRzN|;FYJe~qWD=t(qJ@AN_~J-G5WCGPRihRw%JZ0{32g`
z(1edf6W@ICM;Y(zR-i&`L*mQMojWt<o;l~v{`~dzJAh?8jUvP_vswFK3aPj!Eyr}d
zy6ILoxvjQ&)wEg-^HtM!YrGXh1OrhF8i?W?!$OZ!%H!NDR9nikY*mykStbyM!9^j3
zT4IQ#i<!z0VmKd#VIYoShG+d?uCyH`3T3`s@H}hh2suI=ZH8oN)7r93$C7n(Re3_z
z^Sa82fl(x>Y)v#;46GPK3KydoGcb+`hPypVuW+^D)+(YUl<P5!Z|UeH6^60&Ndk1!
z7;(64U=mXdqn2&+rYcD3DoY7h5}|oI_HP@y7~})QtJ;hSjXiDPI&LtG*p4fC7qsjN
zeX3XaOfN>KA0v&IeXA2CA$hsosB&-3sybwTvgF#9Q?Wdu=bdCkZ3q%zv9D?;71wQ*
zXNYO{J<;^tiOY85xoB|N3dD`pxmw$45`%C$Q=}#g3}A>ix^127MWWjTh5=u0hL;`J
z+e$d*iq$;3c!rNyD_K?UkSvLyn+|cQ!Ma7HYjuQlySMfys9(p|u-Danw~w|jk?2FK
zqAo4f_DI=}e<|?a%b&SDW2<i4v-u05TXORBj+)ay5qeSjrw4>Ut%6~S=<y;+V}v4l
zdGx(Wvv;&3Ok*-TiXR6EXLEZP%1-Se@rAM>+|p}4QiV>vhJiPPvyR)8pAJr926t$t
z_ob;4^P>#SbnPs1ol3Jb>b3Al{1XiU^q`-5@533vatDt7YnY;pCRwIJAq|_$?h?CQ
zB=&J3o7=~wBa*{DnJN*qiD1n~91BhzBRGpW!elUUkJdEyTe_UaPJKgc{SW*Bu4MOd
q?K9=Wz61f!jbo^(L(~-Jai1_B(C*+4I<r8Thm;B75k-&v=*e#hh|Tr@

literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/org/objectweb/asm/tree/MultiANewArrayInsnNode.java b/tests/test_data/std/jdk/internal/org/objectweb/asm/tree/MultiANewArrayInsnNode.java
new file mode 100644
index 00000000..87a00b69
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/org/objectweb/asm/tree/MultiANewArrayInsnNode.java
@@ -0,0 +1,106 @@
+/*
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/*
+ * This file is available under and governed by the GNU General Public
+ * License version 2 only, as published by the Free Software Foundation.
+ * However, the following notice accompanied the original version of this
+ * file:
+ *
+ * ASM: a very small and fast Java bytecode manipulation framework
+ * Copyright (c) 2000-2011 INRIA, France Telecom
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the copyright holders nor the names of its
+ *    contributors may be used to endorse or promote products derived from
+ *    this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+package jdk.internal.org.objectweb.asm.tree;
+
+import java.util.Map;
+import jdk.internal.org.objectweb.asm.MethodVisitor;
+import jdk.internal.org.objectweb.asm.Opcodes;
+
+/**
+ * A node that represents a MULTIANEWARRAY instruction.
+ *
+ * @author Eric Bruneton
+ */
+public class MultiANewArrayInsnNode extends AbstractInsnNode {
+
+    /** An array type descriptor (see {@link jdk.internal.org.objectweb.asm.Type}). */
+    public String desc;
+
+    /** Number of dimensions of the array to allocate. */
+    public int dims;
+
+    /**
+      * Constructs a new {@link MultiANewArrayInsnNode}.
+      *
+      * @param descriptor an array type descriptor (see {@link jdk.internal.org.objectweb.asm.Type}).
+      * @param numDimensions the number of dimensions of the array to allocate.
+      */
+    public MultiANewArrayInsnNode(final String descriptor, final int numDimensions) {
+        super(Opcodes.MULTIANEWARRAY);
+        this.desc = descriptor;
+        this.dims = numDimensions;
+    }
+
+    @Override
+    public int getType() {
+        return MULTIANEWARRAY_INSN;
+    }
+
+    @Override
+    public void accept(final MethodVisitor methodVisitor) {
+        methodVisitor.visitMultiANewArrayInsn(desc, dims);
+        acceptAnnotations(methodVisitor);
+    }
+
+    @Override
+    public AbstractInsnNode clone(final Map<LabelNode, LabelNode> clonedLabels) {
+        return new MultiANewArrayInsnNode(desc, dims).cloneAnnotations(this);
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/org/objectweb/asm/tree/ParameterNode.class b/tests/test_data/std/jdk/internal/org/objectweb/asm/tree/ParameterNode.class
new file mode 100644
index 0000000000000000000000000000000000000000..fa342b8d757eb217b619ce6c982e9137bcb55b74
GIT binary patch
literal 766
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A;s5{u

literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/org/objectweb/asm/tree/ParameterNode.java b/tests/test_data/std/jdk/internal/org/objectweb/asm/tree/ParameterNode.java
new file mode 100644
index 00000000..a2223c8c
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/org/objectweb/asm/tree/ParameterNode.java
@@ -0,0 +1,100 @@
+/*
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/*
+ * This file is available under and governed by the GNU General Public
+ * License version 2 only, as published by the Free Software Foundation.
+ * However, the following notice accompanied the original version of this
+ * file:
+ *
+ * ASM: a very small and fast Java bytecode manipulation framework
+ * Copyright (c) 2000-2011 INRIA, France Telecom
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the copyright holders nor the names of its
+ *    contributors may be used to endorse or promote products derived from
+ *    this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+package jdk.internal.org.objectweb.asm.tree;
+
+import jdk.internal.org.objectweb.asm.MethodVisitor;
+
+/**
+ * A node that represents a parameter of a method.
+ *
+ * @author Remi Forax
+ */
+public class ParameterNode {
+
+    /** The parameter's name. */
+    public String name;
+
+    /**
+      * The parameter's access flags (see {@link jdk.internal.org.objectweb.asm.Opcodes}). Valid values are {@code
+      * ACC_FINAL}, {@code ACC_SYNTHETIC} and {@code ACC_MANDATED}.
+      */
+    public int access;
+
+    /**
+      * Constructs a new {@link ParameterNode}.
+      *
+      * @param access The parameter's access flags. Valid values are {@code ACC_FINAL}, {@code
+      *     ACC_SYNTHETIC} or/and {@code ACC_MANDATED} (see {@link jdk.internal.org.objectweb.asm.Opcodes}).
+      * @param name the parameter's name.
+      */
+    public ParameterNode(final String name, final int access) {
+        this.name = name;
+        this.access = access;
+    }
+
+    /**
+      * Makes the given visitor visit this parameter declaration.
+      *
+      * @param methodVisitor a method visitor.
+      */
+    public void accept(final MethodVisitor methodVisitor) {
+        methodVisitor.visitParameter(name, access);
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/org/objectweb/asm/tree/RecordComponentNode.class b/tests/test_data/std/jdk/internal/org/objectweb/asm/tree/RecordComponentNode.class
new file mode 100644
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HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/org/objectweb/asm/tree/RecordComponentNode.java b/tests/test_data/std/jdk/internal/org/objectweb/asm/tree/RecordComponentNode.java
new file mode 100644
index 00000000..7cc87a77
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/org/objectweb/asm/tree/RecordComponentNode.java
@@ -0,0 +1,236 @@
+/*
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/*
+ * This file is available under and governed by the GNU General Public
+ * License version 2 only, as published by the Free Software Foundation.
+ * However, the following notice accompanied the original version of this
+ * file:
+ *
+ * ASM: a very small and fast Java bytecode manipulation framework
+ * Copyright (c) 2000-2011 INRIA, France Telecom
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the copyright holders nor the names of its
+ *    contributors may be used to endorse or promote products derived from
+ *    this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+package jdk.internal.org.objectweb.asm.tree;
+
+import java.util.List;
+import jdk.internal.org.objectweb.asm.AnnotationVisitor;
+import jdk.internal.org.objectweb.asm.Attribute;
+import jdk.internal.org.objectweb.asm.ClassVisitor;
+import jdk.internal.org.objectweb.asm.Opcodes;
+import jdk.internal.org.objectweb.asm.RecordComponentVisitor;
+import jdk.internal.org.objectweb.asm.TypePath;
+
+/**
+ * A node that represents a record component.
+ *
+ * @author Remi Forax
+ */
+public class RecordComponentNode extends RecordComponentVisitor {
+
+    /** The record component name. */
+    public String name;
+
+    /** The record component descriptor (see {@link jdk.internal.org.objectweb.asm.Type}). */
+    public String descriptor;
+
+    /** The record component signature. May be {@literal null}. */
+    public String signature;
+
+    /** The runtime visible annotations of this record component. May be {@literal null}. */
+    public List<AnnotationNode> visibleAnnotations;
+
+    /** The runtime invisible annotations of this record component. May be {@literal null}. */
+    public List<AnnotationNode> invisibleAnnotations;
+
+    /** The runtime visible type annotations of this record component. May be {@literal null}. */
+    public List<TypeAnnotationNode> visibleTypeAnnotations;
+
+    /** The runtime invisible type annotations of this record component. May be {@literal null}. */
+    public List<TypeAnnotationNode> invisibleTypeAnnotations;
+
+    /** The non standard attributes of this record component. * May be {@literal null}. */
+    public List<Attribute> attrs;
+
+    /**
+      * Constructs a new {@link RecordComponentNode}. <i>Subclasses must not use this constructor</i>.
+      * Instead, they must use the {@link #RecordComponentNode(int, String, String, String)} version.
+      *
+      * @param name the record component name.
+      * @param descriptor the record component descriptor (see {@link jdk.internal.org.objectweb.asm.Type}).
+      * @param signature the record component signature.
+      * @throws IllegalStateException If a subclass calls this constructor.
+      */
+    public RecordComponentNode(final String name, final String descriptor, final String signature) {
+        this(/* latest api = */ Opcodes.ASM9, name, descriptor, signature);
+        if (getClass() != RecordComponentNode.class) {
+            throw new IllegalStateException();
+        }
+    }
+
+    /**
+      * Constructs a new {@link RecordComponentNode}.
+      *
+      * @param api the ASM API version implemented by this visitor. Must be one of {@link Opcodes#ASM8}
+      *     or {@link Opcodes#ASM9}.
+      * @param name the record component name.
+      * @param descriptor the record component descriptor (see {@link jdk.internal.org.objectweb.asm.Type}).
+      * @param signature the record component signature.
+      */
+    public RecordComponentNode(
+            final int api, final String name, final String descriptor, final String signature) {
+        super(api);
+        this.name = name;
+        this.descriptor = descriptor;
+        this.signature = signature;
+    }
+
+    // -----------------------------------------------------------------------------------------------
+    // Implementation of the FieldVisitor abstract class
+    // -----------------------------------------------------------------------------------------------
+
+    @Override
+    public AnnotationVisitor visitAnnotation(final String descriptor, final boolean visible) {
+        AnnotationNode annotation = new AnnotationNode(descriptor);
+        if (visible) {
+            visibleAnnotations = Util.add(visibleAnnotations, annotation);
+        } else {
+            invisibleAnnotations = Util.add(invisibleAnnotations, annotation);
+        }
+        return annotation;
+    }
+
+    @Override
+    public AnnotationVisitor visitTypeAnnotation(
+            final int typeRef, final TypePath typePath, final String descriptor, final boolean visible) {
+        TypeAnnotationNode typeAnnotation = new TypeAnnotationNode(typeRef, typePath, descriptor);
+        if (visible) {
+            visibleTypeAnnotations = Util.add(visibleTypeAnnotations, typeAnnotation);
+        } else {
+            invisibleTypeAnnotations = Util.add(invisibleTypeAnnotations, typeAnnotation);
+        }
+        return typeAnnotation;
+    }
+
+    @Override
+    public void visitAttribute(final Attribute attribute) {
+        attrs = Util.add(attrs, attribute);
+    }
+
+    @Override
+    public void visitEnd() {
+        // Nothing to do.
+    }
+
+    // -----------------------------------------------------------------------------------------------
+    // Accept methods
+    // -----------------------------------------------------------------------------------------------
+
+    /**
+      * Checks that this record component node is compatible with the given ASM API version. This
+      * method checks that this node, and all its children recursively, do not contain elements that
+      * were introduced in more recent versions of the ASM API than the given version.
+      *
+      * @param api an ASM API version. Must be one of {@link Opcodes#ASM8} or {@link Opcodes#ASM9}.
+      */
+    public void check(final int api) {
+        if (api < Opcodes.ASM8) {
+            throw new UnsupportedClassVersionException();
+        }
+    }
+
+    /**
+      * Makes the given class visitor visit this record component.
+      *
+      * @param classVisitor a class visitor.
+      */
+    public void accept(final ClassVisitor classVisitor) {
+        RecordComponentVisitor recordComponentVisitor =
+                classVisitor.visitRecordComponent(name, descriptor, signature);
+        if (recordComponentVisitor == null) {
+            return;
+        }
+        // Visit the annotations.
+        if (visibleAnnotations != null) {
+            for (int i = 0, n = visibleAnnotations.size(); i < n; ++i) {
+                AnnotationNode annotation = visibleAnnotations.get(i);
+                annotation.accept(recordComponentVisitor.visitAnnotation(annotation.desc, true));
+            }
+        }
+        if (invisibleAnnotations != null) {
+            for (int i = 0, n = invisibleAnnotations.size(); i < n; ++i) {
+                AnnotationNode annotation = invisibleAnnotations.get(i);
+                annotation.accept(recordComponentVisitor.visitAnnotation(annotation.desc, false));
+            }
+        }
+        if (visibleTypeAnnotations != null) {
+            for (int i = 0, n = visibleTypeAnnotations.size(); i < n; ++i) {
+                TypeAnnotationNode typeAnnotation = visibleTypeAnnotations.get(i);
+                typeAnnotation.accept(
+                        recordComponentVisitor.visitTypeAnnotation(
+                                typeAnnotation.typeRef, typeAnnotation.typePath, typeAnnotation.desc, true));
+            }
+        }
+        if (invisibleTypeAnnotations != null) {
+            for (int i = 0, n = invisibleTypeAnnotations.size(); i < n; ++i) {
+                TypeAnnotationNode typeAnnotation = invisibleTypeAnnotations.get(i);
+                typeAnnotation.accept(
+                        recordComponentVisitor.visitTypeAnnotation(
+                                typeAnnotation.typeRef, typeAnnotation.typePath, typeAnnotation.desc, false));
+            }
+        }
+        // Visit the non standard attributes.
+        if (attrs != null) {
+            for (int i = 0, n = attrs.size(); i < n; ++i) {
+                recordComponentVisitor.visitAttribute(attrs.get(i));
+            }
+        }
+        recordComponentVisitor.visitEnd();
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/org/objectweb/asm/tree/TableSwitchInsnNode.class b/tests/test_data/std/jdk/internal/org/objectweb/asm/tree/TableSwitchInsnNode.class
new file mode 100644
index 0000000000000000000000000000000000000000..1be35fe62428cbe19410ac61d287e98c275334df
GIT binary patch
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/org/objectweb/asm/tree/TableSwitchInsnNode.java b/tests/test_data/std/jdk/internal/org/objectweb/asm/tree/TableSwitchInsnNode.java
new file mode 100644
index 00000000..94287b55
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/org/objectweb/asm/tree/TableSwitchInsnNode.java
@@ -0,0 +1,125 @@
+/*
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/*
+ * This file is available under and governed by the GNU General Public
+ * License version 2 only, as published by the Free Software Foundation.
+ * However, the following notice accompanied the original version of this
+ * file:
+ *
+ * ASM: a very small and fast Java bytecode manipulation framework
+ * Copyright (c) 2000-2011 INRIA, France Telecom
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the copyright holders nor the names of its
+ *    contributors may be used to endorse or promote products derived from
+ *    this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+package jdk.internal.org.objectweb.asm.tree;
+
+import java.util.List;
+import java.util.Map;
+import jdk.internal.org.objectweb.asm.Label;
+import jdk.internal.org.objectweb.asm.MethodVisitor;
+import jdk.internal.org.objectweb.asm.Opcodes;
+
+/**
+ * A node that represents a TABLESWITCH instruction.
+ *
+ * @author Eric Bruneton
+ */
+public class TableSwitchInsnNode extends AbstractInsnNode {
+
+    /** The minimum key value. */
+    public int min;
+
+    /** The maximum key value. */
+    public int max;
+
+    /** Beginning of the default handler block. */
+    public LabelNode dflt;
+
+    /** Beginnings of the handler blocks. This list is a list of {@link LabelNode} objects. */
+    public List<LabelNode> labels;
+
+    /**
+      * Constructs a new {@link TableSwitchInsnNode}.
+      *
+      * @param min the minimum key value.
+      * @param max the maximum key value.
+      * @param dflt beginning of the default handler block.
+      * @param labels beginnings of the handler blocks. {@code labels[i]} is the beginning of the
+      *     handler block for the {@code min + i} key.
+      */
+    public TableSwitchInsnNode(
+            final int min, final int max, final LabelNode dflt, final LabelNode... labels) {
+        super(Opcodes.TABLESWITCH);
+        this.min = min;
+        this.max = max;
+        this.dflt = dflt;
+        this.labels = Util.asArrayList(labels);
+    }
+
+    @Override
+    public int getType() {
+        return TABLESWITCH_INSN;
+    }
+
+    @Override
+    public void accept(final MethodVisitor methodVisitor) {
+        Label[] labelsArray = new Label[this.labels.size()];
+        for (int i = 0, n = labelsArray.length; i < n; ++i) {
+            labelsArray[i] = this.labels.get(i).getLabel();
+        }
+        methodVisitor.visitTableSwitchInsn(min, max, dflt.getLabel(), labelsArray);
+        acceptAnnotations(methodVisitor);
+    }
+
+    @Override
+    public AbstractInsnNode clone(final Map<LabelNode, LabelNode> clonedLabels) {
+        return new TableSwitchInsnNode(min, max, clone(dflt, clonedLabels), clone(labels, clonedLabels))
+                .cloneAnnotations(this);
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/org/objectweb/asm/tree/TryCatchBlockNode.class b/tests/test_data/std/jdk/internal/org/objectweb/asm/tree/TryCatchBlockNode.class
new file mode 100644
index 0000000000000000000000000000000000000000..e3d5ce9bc027d811dbe1f3b4b88f522e4c2fbe8f
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/org/objectweb/asm/tree/TryCatchBlockNode.java b/tests/test_data/std/jdk/internal/org/objectweb/asm/tree/TryCatchBlockNode.java
new file mode 100644
index 00000000..2095218a
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/org/objectweb/asm/tree/TryCatchBlockNode.java
@@ -0,0 +1,159 @@
+/*
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/*
+ * This file is available under and governed by the GNU General Public
+ * License version 2 only, as published by the Free Software Foundation.
+ * However, the following notice accompanied the original version of this
+ * file:
+ *
+ * ASM: a very small and fast Java bytecode manipulation framework
+ * Copyright (c) 2000-2011 INRIA, France Telecom
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the copyright holders nor the names of its
+ *    contributors may be used to endorse or promote products derived from
+ *    this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+package jdk.internal.org.objectweb.asm.tree;
+
+import java.util.List;
+import jdk.internal.org.objectweb.asm.MethodVisitor;
+
+/**
+ * A node that represents a try catch block.
+ *
+ * @author Eric Bruneton
+ */
+public class TryCatchBlockNode {
+
+    /** The beginning of the exception handler's scope (inclusive). */
+    public LabelNode start;
+
+    /** The end of the exception handler's scope (exclusive). */
+    public LabelNode end;
+
+    /** The beginning of the exception handler's code. */
+    public LabelNode handler;
+
+    /**
+      * The internal name of the type of exceptions handled by the handler. May be {@literal null} to
+      * catch any exceptions (for "finally" blocks).
+      */
+    public String type;
+
+    /** The runtime visible type annotations on the exception handler type. May be {@literal null}. */
+    public List<TypeAnnotationNode> visibleTypeAnnotations;
+
+    /**
+      * The runtime invisible type annotations on the exception handler type. May be {@literal null}.
+      */
+    public List<TypeAnnotationNode> invisibleTypeAnnotations;
+
+    /**
+      * Constructs a new {@link TryCatchBlockNode}.
+      *
+      * @param start the beginning of the exception handler's scope (inclusive).
+      * @param end the end of the exception handler's scope (exclusive).
+      * @param handler the beginning of the exception handler's code.
+      * @param type the internal name of the type of exceptions handled by the handler (see {@link
+      *     jdk.internal.org.objectweb.asm.Type#getInternalName()}), or {@literal null} to catch any exceptions (for
+      *     "finally" blocks).
+      */
+    public TryCatchBlockNode(
+            final LabelNode start, final LabelNode end, final LabelNode handler, final String type) {
+        this.start = start;
+        this.end = end;
+        this.handler = handler;
+        this.type = type;
+    }
+
+    /**
+      * Updates the index of this try catch block in the method's list of try catch block nodes. This
+      * index maybe stored in the 'target' field of the type annotations of this block.
+      *
+      * @param index the new index of this try catch block in the method's list of try catch block
+      *     nodes.
+      */
+    public void updateIndex(final int index) {
+        int newTypeRef = 0x42000000 | (index << 8);
+        if (visibleTypeAnnotations != null) {
+            for (int i = 0, n = visibleTypeAnnotations.size(); i < n; ++i) {
+                visibleTypeAnnotations.get(i).typeRef = newTypeRef;
+            }
+        }
+        if (invisibleTypeAnnotations != null) {
+            for (int i = 0, n = invisibleTypeAnnotations.size(); i < n; ++i) {
+                invisibleTypeAnnotations.get(i).typeRef = newTypeRef;
+            }
+        }
+    }
+
+    /**
+      * Makes the given visitor visit this try catch block.
+      *
+      * @param methodVisitor a method visitor.
+      */
+    public void accept(final MethodVisitor methodVisitor) {
+        methodVisitor.visitTryCatchBlock(
+                start.getLabel(), end.getLabel(), handler == null ? null : handler.getLabel(), type);
+        if (visibleTypeAnnotations != null) {
+            for (int i = 0, n = visibleTypeAnnotations.size(); i < n; ++i) {
+                TypeAnnotationNode typeAnnotation = visibleTypeAnnotations.get(i);
+                typeAnnotation.accept(
+                        methodVisitor.visitTryCatchAnnotation(
+                                typeAnnotation.typeRef, typeAnnotation.typePath, typeAnnotation.desc, true));
+            }
+        }
+        if (invisibleTypeAnnotations != null) {
+            for (int i = 0, n = invisibleTypeAnnotations.size(); i < n; ++i) {
+                TypeAnnotationNode typeAnnotation = invisibleTypeAnnotations.get(i);
+                typeAnnotation.accept(
+                        methodVisitor.visitTryCatchAnnotation(
+                                typeAnnotation.typeRef, typeAnnotation.typePath, typeAnnotation.desc, false));
+            }
+        }
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/org/objectweb/asm/tree/TypeAnnotationNode.class b/tests/test_data/std/jdk/internal/org/objectweb/asm/tree/TypeAnnotationNode.class
new file mode 100644
index 0000000000000000000000000000000000000000..391b41e9a433c673cb0839b47fc0f820ee720c5f
GIT binary patch
literal 1157
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z0WNAXn4zhR(a)3u(<7sZ=@IQASzM;`6*_&SJd55X$4-~#7rL;VFUZ@OPZ<1$k>_35
zKR(mvG_KOqHmNV@hkHr!D@>w^YlJ(!5}3stov4^;$xNi1rc6{uh3YsI7r}nhWs4)j
zIIeRn5J=lYg?p@GO3V;uJEaM$i*wG@E+(CYU0l>;QisUA0Y`!YIv9mAWN!6t?vt_M
Zl73CbHncPu+jx;Sk)~zQ_Zz12%|8W~8d3lN

literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/org/objectweb/asm/tree/TypeAnnotationNode.java b/tests/test_data/std/jdk/internal/org/objectweb/asm/tree/TypeAnnotationNode.java
new file mode 100644
index 00000000..7a6bbb20
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/org/objectweb/asm/tree/TypeAnnotationNode.java
@@ -0,0 +1,117 @@
+/*
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/*
+ * This file is available under and governed by the GNU General Public
+ * License version 2 only, as published by the Free Software Foundation.
+ * However, the following notice accompanied the original version of this
+ * file:
+ *
+ * ASM: a very small and fast Java bytecode manipulation framework
+ * Copyright (c) 2000-2011 INRIA, France Telecom
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the copyright holders nor the names of its
+ *    contributors may be used to endorse or promote products derived from
+ *    this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+package jdk.internal.org.objectweb.asm.tree;
+
+import jdk.internal.org.objectweb.asm.Opcodes;
+import jdk.internal.org.objectweb.asm.TypePath;
+
+/**
+ * A node that represents a type annotation.
+ *
+ * @author Eric Bruneton
+ */
+public class TypeAnnotationNode extends AnnotationNode {
+
+    /** A reference to the annotated type. See {@link jdk.internal.org.objectweb.asm.TypeReference}. */
+    public int typeRef;
+
+    /**
+      * The path to the annotated type argument, wildcard bound, array element type, or static outer
+      * type within the referenced type. May be {@literal null} if the annotation targets 'typeRef' as
+      * a whole.
+      */
+    public TypePath typePath;
+
+    /**
+      * Constructs a new {@link AnnotationNode}. <i>Subclasses must not use this constructor</i>.
+      * Instead, they must use the {@link #TypeAnnotationNode(int, int, TypePath, String)} version.
+      *
+      * @param typeRef a reference to the annotated type. See {@link jdk.internal.org.objectweb.asm.TypeReference}.
+      * @param typePath the path to the annotated type argument, wildcard bound, array element type, or
+      *     static inner type within 'typeRef'. May be {@literal null} if the annotation targets
+      *     'typeRef' as a whole.
+      * @param descriptor the class descriptor of the annotation class.
+      * @throws IllegalStateException If a subclass calls this constructor.
+      */
+    public TypeAnnotationNode(final int typeRef, final TypePath typePath, final String descriptor) {
+        this(/* latest api = */ Opcodes.ASM9, typeRef, typePath, descriptor);
+        if (getClass() != TypeAnnotationNode.class) {
+            throw new IllegalStateException();
+        }
+    }
+
+    /**
+      * Constructs a new {@link AnnotationNode}.
+      *
+      * @param api the ASM API version implemented by this visitor. Must be one of the {@code
+      *     ASM}<i>x</i> values in {@link Opcodes}.
+      * @param typeRef a reference to the annotated type. See {@link jdk.internal.org.objectweb.asm.TypeReference}.
+      * @param typePath the path to the annotated type argument, wildcard bound, array element type, or
+      *     static inner type within 'typeRef'. May be {@literal null} if the annotation targets
+      *     'typeRef' as a whole.
+      * @param descriptor the class descriptor of the annotation class.
+      */
+    public TypeAnnotationNode(
+            final int api, final int typeRef, final TypePath typePath, final String descriptor) {
+        super(api, descriptor);
+        this.typeRef = typeRef;
+        this.typePath = typePath;
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/org/objectweb/asm/tree/TypeInsnNode.class b/tests/test_data/std/jdk/internal/org/objectweb/asm/tree/TypeInsnNode.class
new file mode 100644
index 0000000000000000000000000000000000000000..edd0d06a62a52f0e8ba1845b0a904d6d00fc165f
GIT binary patch
literal 1691
zcmcJPYflqF6o%g^rKM%LwAQNN1-!NkvVf=`N=OKarb)pVNF#jPZYO22oo#lf7=Mvp
z{Gf?IqKQAiA7wl<yFiO11rpM9_RM9U_sn}{=g;4tzX7b_bs8}YBoQ|-hy=sZUj3ux
z3dwz8H!aU^SYB<9JMt5+S$5E}q|dpvS_`CaJF+YSvEkJ@Lt@z#u3TY=7s|zI3PVUG
zkv1?4gJJ$6%&pIDe#(p2dEhW)D|`07Z8dGtur{UdibhGXM-7Z&oK(HGqvcsSjVx{?
zkuz`;d4}0OlIvXVdiAOsxYF|(M)p;7oB~6>Q2t-JSWT1mZ3A~O!H}^XhqvXb5T3N9
z>xqD2p-{PuZYd<*Ro3Sf`@Vq(m|_@rnx5c2XwesaZe>cvei@zr8WnO)J3Cf!1>fkj
zYTVzlYfUP3w&FQ<vugXU>PLfdx$BYvix*Nm_E{aB5-CY4Jwqzs@?BKVWP|H!Fboum
zWh!)NHWjMXTe!J?f<1*Mu|aJu!&~xG9j%UZo7TGBzPeF{Ce|x<jW@}Hu`^scOudHD
zW+T(Q-lfa^_M%Irb+mJrT)slPPi?vlVatwBet$XRz_rU?`6#A0y^injH?BH<neNjw
zr)r34`gCG+n=$&)g+tLGMf6QkJ59a!>WZW1usL}IX3icU`JK8kJfwD1Pko@}+el*v
zk7#TvT#m<hLOps>T{i?%(NhwLQTz;v2){yoC7&=S4={2{RyQl)5V@|Y`Eb<<H4#x6
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ZDbod79qvJmEYipe8i`?vqL(^)^$(O@tsDRV

literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/org/objectweb/asm/tree/TypeInsnNode.java b/tests/test_data/std/jdk/internal/org/objectweb/asm/tree/TypeInsnNode.java
new file mode 100644
index 00000000..ba01f50e
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/org/objectweb/asm/tree/TypeInsnNode.java
@@ -0,0 +1,117 @@
+/*
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/*
+ * This file is available under and governed by the GNU General Public
+ * License version 2 only, as published by the Free Software Foundation.
+ * However, the following notice accompanied the original version of this
+ * file:
+ *
+ * ASM: a very small and fast Java bytecode manipulation framework
+ * Copyright (c) 2000-2011 INRIA, France Telecom
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the copyright holders nor the names of its
+ *    contributors may be used to endorse or promote products derived from
+ *    this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+package jdk.internal.org.objectweb.asm.tree;
+
+import java.util.Map;
+import jdk.internal.org.objectweb.asm.MethodVisitor;
+
+/**
+ * A node that represents a type instruction. A type instruction is an instruction which takes an
+ * internal name as parameter (see {@link jdk.internal.org.objectweb.asm.Type#getInternalName()}).
+ *
+ * @author Eric Bruneton
+ */
+public class TypeInsnNode extends AbstractInsnNode {
+
+    /**
+      * The operand of this instruction. Despite its name (due to historical reasons), this operand is
+      * an internal name (see {@link jdk.internal.org.objectweb.asm.Type#getInternalName()}).
+      */
+    public String desc;
+
+    /**
+      * Constructs a new {@link TypeInsnNode}.
+      *
+      * @param opcode the opcode of the type instruction to be constructed. This opcode must be NEW,
+      *     ANEWARRAY, CHECKCAST or INSTANCEOF.
+      * @param type the operand of the instruction to be constructed. This operand is an internal name
+      *     (see {@link jdk.internal.org.objectweb.asm.Type#getInternalName()}).
+      */
+    public TypeInsnNode(final int opcode, final String type) {
+        super(opcode);
+        this.desc = type;
+    }
+
+    /**
+      * Sets the opcode of this instruction.
+      *
+      * @param opcode the new instruction opcode. This opcode must be NEW, ANEWARRAY, CHECKCAST or
+      *     INSTANCEOF.
+      */
+    public void setOpcode(final int opcode) {
+        this.opcode = opcode;
+    }
+
+    @Override
+    public int getType() {
+        return TYPE_INSN;
+    }
+
+    @Override
+    public void accept(final MethodVisitor methodVisitor) {
+        methodVisitor.visitTypeInsn(opcode, desc);
+        acceptAnnotations(methodVisitor);
+    }
+
+    @Override
+    public AbstractInsnNode clone(final Map<LabelNode, LabelNode> clonedLabels) {
+        return new TypeInsnNode(opcode, desc).cloneAnnotations(this);
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/org/objectweb/asm/tree/UnsupportedClassVersionException.class b/tests/test_data/std/jdk/internal/org/objectweb/asm/tree/UnsupportedClassVersionException.class
new file mode 100644
index 0000000000000000000000000000000000000000..f568d18a3b45f95eedd32ceabc0dffeb0572b26e
GIT binary patch
literal 467
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zJJm*qGlBA9XB1&YpgSGkOKk!<qcUmTMA~FZX?UbWDnFCK5y_$P`Fw6&pmCfj??>c3
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/org/objectweb/asm/tree/UnsupportedClassVersionException.java b/tests/test_data/std/jdk/internal/org/objectweb/asm/tree/UnsupportedClassVersionException.java
new file mode 100644
index 00000000..ec9c9d04
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/org/objectweb/asm/tree/UnsupportedClassVersionException.java
@@ -0,0 +1,72 @@
+/*
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/*
+ * This file is available under and governed by the GNU General Public
+ * License version 2 only, as published by the Free Software Foundation.
+ * However, the following notice accompanied the original version of this
+ * file:
+ *
+ * ASM: a very small and fast Java bytecode manipulation framework
+ * Copyright (c) 2000-2011 INRIA, France Telecom
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the copyright holders nor the names of its
+ *    contributors may be used to endorse or promote products derived from
+ *    this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGE.
+ */
+package jdk.internal.org.objectweb.asm.tree;
+
+/**
+ * Exception thrown in {@link AnnotationNode#check}, {@link ClassNode#check}, {@link
+ * FieldNode#check} and {@link MethodNode#check} when these nodes (or their children, recursively)
+ * contain elements that were introduced in more recent versions of the ASM API than version passed
+ * to these methods.
+ *
+ * @author Eric Bruneton
+ */
+public class UnsupportedClassVersionException extends RuntimeException {
+
+    private static final long serialVersionUID = -3502347765891805831L;
+}
diff --git a/tests/test_data/std/jdk/internal/org/objectweb/asm/tree/Util.class b/tests/test_data/std/jdk/internal/org/objectweb/asm/tree/Util.class
new file mode 100644
index 0000000000000000000000000000000000000000..09376a3299d356f49c4930534570c7789c078ced
GIT binary patch
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/org/objectweb/asm/tree/Util.java b/tests/test_data/std/jdk/internal/org/objectweb/asm/tree/Util.java
new file mode 100644
index 00000000..ae09e55a
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/org/objectweb/asm/tree/Util.java
@@ -0,0 +1,195 @@
+/*
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/*
+ * This file is available under and governed by the GNU General Public
+ * License version 2 only, as published by the Free Software Foundation.
+ * However, the following notice accompanied the original version of this
+ * file:
+ *
+ * ASM: a very small and fast Java bytecode manipulation framework
+ * Copyright (c) 2000-2011 INRIA, France Telecom
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the copyright holders nor the names of its
+ *    contributors may be used to endorse or promote products derived from
+ *    this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+package jdk.internal.org.objectweb.asm.tree;
+
+import java.util.ArrayList;
+import java.util.List;
+
+/**
+ * Utility methods to convert an array of primitive or object values to a mutable ArrayList, not
+ * baked by the array (unlike {@link java.util.Arrays#asList}).
+ *
+ * @author Eric Bruneton
+ */
+final class Util {
+
+    private Util() {}
+
+    static <T> List<T> add(final List<T> list, final T element) {
+        List<T> newList = list == null ? new ArrayList<>(1) : list;
+        newList.add(element);
+        return newList;
+    }
+
+    static <T> List<T> asArrayList(final int length) {
+        List<T> list = new ArrayList<>(length);
+        for (int i = 0; i < length; ++i) {
+            list.add(null);
+        }
+        return list;
+    }
+
+    static <T> List<T> asArrayList(final T[] array) {
+        if (array == null) {
+            return new ArrayList<>();
+        }
+        ArrayList<T> list = new ArrayList<>(array.length);
+        for (T t : array) {
+            list.add(t); // NOPMD(UseArraysAsList): we want a modifiable list.
+        }
+        return list;
+    }
+
+    static List<Byte> asArrayList(final byte[] byteArray) {
+        if (byteArray == null) {
+            return new ArrayList<>();
+        }
+        ArrayList<Byte> byteList = new ArrayList<>(byteArray.length);
+        for (byte b : byteArray) {
+            byteList.add(b); // NOPMD(UseArraysAsList): we want a modifiable list.
+        }
+        return byteList;
+    }
+
+    static List<Boolean> asArrayList(final boolean[] booleanArray) {
+        if (booleanArray == null) {
+            return new ArrayList<>();
+        }
+        ArrayList<Boolean> booleanList = new ArrayList<>(booleanArray.length);
+        for (boolean b : booleanArray) {
+            booleanList.add(b); // NOPMD(UseArraysAsList): we want a modifiable list.
+        }
+        return booleanList;
+    }
+
+    static List<Short> asArrayList(final short[] shortArray) {
+        if (shortArray == null) {
+            return new ArrayList<>();
+        }
+        ArrayList<Short> shortList = new ArrayList<>(shortArray.length);
+        for (short s : shortArray) {
+            shortList.add(s); // NOPMD(UseArraysAsList): we want a modifiable list.
+        }
+        return shortList;
+    }
+
+    static List<Character> asArrayList(final char[] charArray) {
+        if (charArray == null) {
+            return new ArrayList<>();
+        }
+        ArrayList<Character> charList = new ArrayList<>(charArray.length);
+        for (char c : charArray) {
+            charList.add(c); // NOPMD(UseArraysAsList): we want a modifiable list.
+        }
+        return charList;
+    }
+
+    static List<Integer> asArrayList(final int[] intArray) {
+        if (intArray == null) {
+            return new ArrayList<>();
+        }
+        ArrayList<Integer> intList = new ArrayList<>(intArray.length);
+        for (int i : intArray) {
+            intList.add(i); // NOPMD(UseArraysAsList): we want a modifiable list.
+        }
+        return intList;
+    }
+
+    static List<Float> asArrayList(final float[] floatArray) {
+        if (floatArray == null) {
+            return new ArrayList<>();
+        }
+        ArrayList<Float> floatList = new ArrayList<>(floatArray.length);
+        for (float f : floatArray) {
+            floatList.add(f); // NOPMD(UseArraysAsList): we want a modifiable list.
+        }
+        return floatList;
+    }
+
+    static List<Long> asArrayList(final long[] longArray) {
+        if (longArray == null) {
+            return new ArrayList<>();
+        }
+        ArrayList<Long> longList = new ArrayList<>(longArray.length);
+        for (long l : longArray) {
+            longList.add(l); // NOPMD(UseArraysAsList): we want a modifiable list.
+        }
+        return longList;
+    }
+
+    static List<Double> asArrayList(final double[] doubleArray) {
+        if (doubleArray == null) {
+            return new ArrayList<>();
+        }
+        ArrayList<Double> doubleList = new ArrayList<>(doubleArray.length);
+        for (double d : doubleArray) {
+            doubleList.add(d); // NOPMD(UseArraysAsList): we want a modifiable list.
+        }
+        return doubleList;
+    }
+
+    static <T> List<T> asArrayList(final int length, final T[] array) {
+        List<T> list = new ArrayList<>(length);
+        for (int i = 0; i < length; ++i) {
+            list.add(array[i]); // NOPMD(UseArraysAsList): we convert a part of the array.
+        }
+        return list;
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/org/objectweb/asm/tree/VarInsnNode.class b/tests/test_data/std/jdk/internal/org/objectweb/asm/tree/VarInsnNode.class
new file mode 100644
index 0000000000000000000000000000000000000000..c96acc6cb63dab42b41d3a533d32cfc0132a74de
GIT binary patch
literal 1652
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zVbt*gU-Y2;zUWg8FPHjdbow@`&#JE1NY(X4t+U$@;RbJbRKa{TaJWa#xN00vCgql^
z3^<coR|U%q160C_-xQx1vTY$>>EbbDHig{y+#<n5u~ea|Mt(C4?e<n`zMp1KWl1ol
z-DP-5mhwGrcckmtYrJ)FuS`vBR(V5s<if}aF2h8xXLPLCx1e|FQopn4YH1zyJC)D5
ze3?$4U3WKqE;}JP`{jfKmo9(duQ9hCbV5hGaMc$$+Vug=s}kZi{X7P>DQX3(lTehR
zi2f?N&(P?#>Rt34w5AThtm%DZzSGd4jli&e^@f($k;7Zup}Co8Iqu>fjcB84Ed*21
zeToc<A0Qp$mualz)7I2JhK|XqWda|F%r$i)T6IKC$5e)gD8{TgdMX_w^;O+<hDrwz
znh|AT#0-WKCgYto%30~<XRRL?qAPQNQET=96UP}vXWga~>`;63y0Xe2WtE48S)Iik
z9uaYdnD3F)?7}Y$y!($o#C7Wc)8FWQqASl<7qxIiEnprtQ6JOl=nQIRfo7i2jDe>V
IE$ZmmKVVFr%K!iX

literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/org/objectweb/asm/tree/VarInsnNode.java b/tests/test_data/std/jdk/internal/org/objectweb/asm/tree/VarInsnNode.java
new file mode 100644
index 00000000..8e0ddfe8
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/org/objectweb/asm/tree/VarInsnNode.java
@@ -0,0 +1,114 @@
+/*
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/*
+ * This file is available under and governed by the GNU General Public
+ * License version 2 only, as published by the Free Software Foundation.
+ * However, the following notice accompanied the original version of this
+ * file:
+ *
+ * ASM: a very small and fast Java bytecode manipulation framework
+ * Copyright (c) 2000-2011 INRIA, France Telecom
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the copyright holders nor the names of its
+ *    contributors may be used to endorse or promote products derived from
+ *    this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+package jdk.internal.org.objectweb.asm.tree;
+
+import java.util.Map;
+import jdk.internal.org.objectweb.asm.MethodVisitor;
+
+/**
+ * A node that represents a local variable instruction. A local variable instruction is an
+ * instruction that loads or stores the value of a local variable.
+ *
+ * @author Eric Bruneton
+ */
+public class VarInsnNode extends AbstractInsnNode {
+
+    /** The operand of this instruction. This operand is the index of a local variable. */
+    public int var;
+
+    /**
+      * Constructs a new {@link VarInsnNode}.
+      *
+      * @param opcode the opcode of the local variable instruction to be constructed. This opcode must
+      *     be ILOAD, LLOAD, FLOAD, DLOAD, ALOAD, ISTORE, LSTORE, FSTORE, DSTORE, ASTORE or RET.
+      * @param varIndex the operand of the instruction to be constructed. This operand is the index of
+      *     a local variable.
+      */
+    public VarInsnNode(final int opcode, final int varIndex) {
+        super(opcode);
+        this.var = varIndex;
+    }
+
+    /**
+      * Sets the opcode of this instruction.
+      *
+      * @param opcode the new instruction opcode. This opcode must be ILOAD, LLOAD, FLOAD, DLOAD,
+      *     ALOAD, ISTORE, LSTORE, FSTORE, DSTORE, ASTORE or RET.
+      */
+    public void setOpcode(final int opcode) {
+        this.opcode = opcode;
+    }
+
+    @Override
+    public int getType() {
+        return VAR_INSN;
+    }
+
+    @Override
+    public void accept(final MethodVisitor methodVisitor) {
+        methodVisitor.visitVarInsn(opcode, var);
+        acceptAnnotations(methodVisitor);
+    }
+
+    @Override
+    public AbstractInsnNode clone(final Map<LabelNode, LabelNode> clonedLabels) {
+        return new VarInsnNode(opcode, var).cloneAnnotations(this);
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/org/objectweb/asm/tree/analysis/Analyzer.class b/tests/test_data/std/jdk/internal/org/objectweb/asm/tree/analysis/Analyzer.class
new file mode 100644
index 0000000000000000000000000000000000000000..7f151898e2b2c5fb8bd93e0b6d1782060766ee70
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HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/org/objectweb/asm/tree/analysis/Analyzer.java b/tests/test_data/std/jdk/internal/org/objectweb/asm/tree/analysis/Analyzer.java
new file mode 100644
index 00000000..a3c277e6
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/org/objectweb/asm/tree/analysis/Analyzer.java
@@ -0,0 +1,729 @@
+/*
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/*
+ * This file is available under and governed by the GNU General Public
+ * License version 2 only, as published by the Free Software Foundation.
+ * However, the following notice accompanied the original version of this
+ * file:
+ *
+ * ASM: a very small and fast Java bytecode manipulation framework
+ * Copyright (c) 2000-2011 INRIA, France Telecom
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the copyright holders nor the names of its
+ *    contributors may be used to endorse or promote products derived from
+ *    this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+package jdk.internal.org.objectweb.asm.tree.analysis;
+
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import jdk.internal.org.objectweb.asm.Opcodes;
+import jdk.internal.org.objectweb.asm.Type;
+import jdk.internal.org.objectweb.asm.tree.AbstractInsnNode;
+import jdk.internal.org.objectweb.asm.tree.IincInsnNode;
+import jdk.internal.org.objectweb.asm.tree.InsnList;
+import jdk.internal.org.objectweb.asm.tree.JumpInsnNode;
+import jdk.internal.org.objectweb.asm.tree.LabelNode;
+import jdk.internal.org.objectweb.asm.tree.LookupSwitchInsnNode;
+import jdk.internal.org.objectweb.asm.tree.MethodNode;
+import jdk.internal.org.objectweb.asm.tree.TableSwitchInsnNode;
+import jdk.internal.org.objectweb.asm.tree.TryCatchBlockNode;
+import jdk.internal.org.objectweb.asm.tree.VarInsnNode;
+
+/**
+ * A semantic bytecode analyzer. <i>This class does not fully check that JSR and RET instructions
+ * are valid.</i>
+ *
+ * @param <V> type of the {@link Value} used for the analysis.
+ * @author Eric Bruneton
+ */
+public class Analyzer<V extends Value> implements Opcodes {
+
+    /** The interpreter to use to symbolically interpret the bytecode instructions. */
+    private final Interpreter<V> interpreter;
+
+    /** The instructions of the currently analyzed method. */
+    private InsnList insnList;
+
+    /** The size of {@link #insnList}. */
+    private int insnListSize;
+
+    /** The exception handlers of the currently analyzed method (one list per instruction index). */
+    private List<TryCatchBlockNode>[] handlers;
+
+    /** The execution stack frames of the currently analyzed method (one per instruction index). */
+    private Frame<V>[] frames;
+
+    /** The subroutines of the currently analyzed method (one per instruction index). */
+    private Subroutine[] subroutines;
+
+    /** The instructions that remain to process (one boolean per instruction index). */
+    private boolean[] inInstructionsToProcess;
+
+    /** The indices of the instructions that remain to process in the currently analyzed method. */
+    private int[] instructionsToProcess;
+
+    /** The number of instructions that remain to process in the currently analyzed method. */
+    private int numInstructionsToProcess;
+
+    /**
+      * Constructs a new {@link Analyzer}.
+      *
+      * @param interpreter the interpreter to use to symbolically interpret the bytecode instructions.
+      */
+    public Analyzer(final Interpreter<V> interpreter) {
+        this.interpreter = interpreter;
+    }
+
+    /**
+      * Analyzes the given method.
+      *
+      * @param owner the internal name of the class to which 'method' belongs (see {@link
+      *     Type#getInternalName()}).
+      * @param method the method to be analyzed. The maxStack and maxLocals fields must have correct
+      *     values.
+      * @return the symbolic state of the execution stack frame at each bytecode instruction of the
+      *     method. The size of the returned array is equal to the number of instructions (and labels)
+      *     of the method. A given frame is {@literal null} if and only if the corresponding
+      *     instruction cannot be reached (dead code).
+      * @throws AnalyzerException if a problem occurs during the analysis.
+      */
+    @SuppressWarnings("unchecked")
+    public Frame<V>[] analyze(final String owner, final MethodNode method) throws AnalyzerException {
+        if ((method.access & (ACC_ABSTRACT | ACC_NATIVE)) != 0) {
+            frames = (Frame<V>[]) new Frame<?>[0];
+            return frames;
+        }
+        insnList = method.instructions;
+        insnListSize = insnList.size();
+        handlers = (List<TryCatchBlockNode>[]) new List<?>[insnListSize];
+        frames = (Frame<V>[]) new Frame<?>[insnListSize];
+        subroutines = new Subroutine[insnListSize];
+        inInstructionsToProcess = new boolean[insnListSize];
+        instructionsToProcess = new int[insnListSize];
+        numInstructionsToProcess = 0;
+
+        // For each exception handler, and each instruction within its range, record in 'handlers' the
+        // fact that execution can flow from this instruction to the exception handler.
+        for (int i = 0; i < method.tryCatchBlocks.size(); ++i) {
+            TryCatchBlockNode tryCatchBlock = method.tryCatchBlocks.get(i);
+            int startIndex = insnList.indexOf(tryCatchBlock.start);
+            int endIndex = insnList.indexOf(tryCatchBlock.end);
+            for (int j = startIndex; j <= endIndex; ++j) {
+                List<TryCatchBlockNode> insnHandlers = handlers[j];
+                if (insnHandlers == null) {
+                    insnHandlers = new ArrayList<>();
+                    handlers[j] = insnHandlers;
+                }
+                insnHandlers.add(tryCatchBlock);
+            }
+        }
+
+        // Finds the method's subroutines.
+        findSubroutines(method.maxLocals);
+
+        // Initializes the data structures for the control flow analysis.
+        Frame<V> currentFrame;
+        try {
+            currentFrame = computeInitialFrame(owner, method);
+            merge(0, currentFrame, null);
+            init(owner, method);
+        } catch (RuntimeException e) {
+            // DontCheck(IllegalCatch): can't be fixed, for backward compatibility.
+            throw new AnalyzerException(insnList.get(0), "Error at instruction 0: " + e.getMessage(), e);
+        }
+
+        // Control flow analysis.
+        while (numInstructionsToProcess > 0) {
+            // Get and remove one instruction from the list of instructions to process.
+            int insnIndex = instructionsToProcess[--numInstructionsToProcess];
+            Frame<V> oldFrame = frames[insnIndex];
+            Subroutine subroutine = subroutines[insnIndex];
+            inInstructionsToProcess[insnIndex] = false;
+
+            // Simulate the execution of this instruction.
+            AbstractInsnNode insnNode = null;
+            try {
+                insnNode = method.instructions.get(insnIndex);
+                int insnOpcode = insnNode.getOpcode();
+                int insnType = insnNode.getType();
+
+                if (insnType == AbstractInsnNode.LABEL
+                        || insnType == AbstractInsnNode.LINE
+                        || insnType == AbstractInsnNode.FRAME) {
+                    merge(insnIndex + 1, oldFrame, subroutine);
+                    newControlFlowEdge(insnIndex, insnIndex + 1);
+                } else {
+                    currentFrame.init(oldFrame).execute(insnNode, interpreter);
+                    subroutine = subroutine == null ? null : new Subroutine(subroutine);
+
+                    if (insnNode instanceof JumpInsnNode) {
+                        JumpInsnNode jumpInsn = (JumpInsnNode) insnNode;
+                        if (insnOpcode != GOTO && insnOpcode != JSR) {
+                            currentFrame.initJumpTarget(insnOpcode, /* target = */ null);
+                            merge(insnIndex + 1, currentFrame, subroutine);
+                            newControlFlowEdge(insnIndex, insnIndex + 1);
+                        }
+                        int jumpInsnIndex = insnList.indexOf(jumpInsn.label);
+                        currentFrame.initJumpTarget(insnOpcode, jumpInsn.label);
+                        if (insnOpcode == JSR) {
+                            merge(
+                                    jumpInsnIndex,
+                                    currentFrame,
+                                    new Subroutine(jumpInsn.label, method.maxLocals, jumpInsn));
+                        } else {
+                            merge(jumpInsnIndex, currentFrame, subroutine);
+                        }
+                        newControlFlowEdge(insnIndex, jumpInsnIndex);
+                    } else if (insnNode instanceof LookupSwitchInsnNode) {
+                        LookupSwitchInsnNode lookupSwitchInsn = (LookupSwitchInsnNode) insnNode;
+                        int targetInsnIndex = insnList.indexOf(lookupSwitchInsn.dflt);
+                        currentFrame.initJumpTarget(insnOpcode, lookupSwitchInsn.dflt);
+                        merge(targetInsnIndex, currentFrame, subroutine);
+                        newControlFlowEdge(insnIndex, targetInsnIndex);
+                        for (int i = 0; i < lookupSwitchInsn.labels.size(); ++i) {
+                            LabelNode label = lookupSwitchInsn.labels.get(i);
+                            targetInsnIndex = insnList.indexOf(label);
+                            currentFrame.initJumpTarget(insnOpcode, label);
+                            merge(targetInsnIndex, currentFrame, subroutine);
+                            newControlFlowEdge(insnIndex, targetInsnIndex);
+                        }
+                    } else if (insnNode instanceof TableSwitchInsnNode) {
+                        TableSwitchInsnNode tableSwitchInsn = (TableSwitchInsnNode) insnNode;
+                        int targetInsnIndex = insnList.indexOf(tableSwitchInsn.dflt);
+                        currentFrame.initJumpTarget(insnOpcode, tableSwitchInsn.dflt);
+                        merge(targetInsnIndex, currentFrame, subroutine);
+                        newControlFlowEdge(insnIndex, targetInsnIndex);
+                        for (int i = 0; i < tableSwitchInsn.labels.size(); ++i) {
+                            LabelNode label = tableSwitchInsn.labels.get(i);
+                            currentFrame.initJumpTarget(insnOpcode, label);
+                            targetInsnIndex = insnList.indexOf(label);
+                            merge(targetInsnIndex, currentFrame, subroutine);
+                            newControlFlowEdge(insnIndex, targetInsnIndex);
+                        }
+                    } else if (insnOpcode == RET) {
+                        if (subroutine == null) {
+                            throw new AnalyzerException(insnNode, "RET instruction outside of a subroutine");
+                        }
+                        for (int i = 0; i < subroutine.callers.size(); ++i) {
+                            JumpInsnNode caller = subroutine.callers.get(i);
+                            int jsrInsnIndex = insnList.indexOf(caller);
+                            if (frames[jsrInsnIndex] != null) {
+                                merge(
+                                        jsrInsnIndex + 1,
+                                        frames[jsrInsnIndex],
+                                        currentFrame,
+                                        subroutines[jsrInsnIndex],
+                                        subroutine.localsUsed);
+                                newControlFlowEdge(insnIndex, jsrInsnIndex + 1);
+                            }
+                        }
+                    } else if (insnOpcode != ATHROW && (insnOpcode < IRETURN || insnOpcode > RETURN)) {
+                        if (subroutine != null) {
+                            if (insnNode instanceof VarInsnNode) {
+                                int varIndex = ((VarInsnNode) insnNode).var;
+                                subroutine.localsUsed[varIndex] = true;
+                                if (insnOpcode == LLOAD
+                                        || insnOpcode == DLOAD
+                                        || insnOpcode == LSTORE
+                                        || insnOpcode == DSTORE) {
+                                    subroutine.localsUsed[varIndex + 1] = true;
+                                }
+                            } else if (insnNode instanceof IincInsnNode) {
+                                int varIndex = ((IincInsnNode) insnNode).var;
+                                subroutine.localsUsed[varIndex] = true;
+                            }
+                        }
+                        merge(insnIndex + 1, currentFrame, subroutine);
+                        newControlFlowEdge(insnIndex, insnIndex + 1);
+                    }
+                }
+
+                List<TryCatchBlockNode> insnHandlers = handlers[insnIndex];
+                if (insnHandlers != null) {
+                    for (TryCatchBlockNode tryCatchBlock : insnHandlers) {
+                        Type catchType;
+                        if (tryCatchBlock.type == null) {
+                            catchType = Type.getObjectType("java/lang/Throwable");
+                        } else {
+                            catchType = Type.getObjectType(tryCatchBlock.type);
+                        }
+                        if (newControlFlowExceptionEdge(insnIndex, tryCatchBlock)) {
+                            Frame<V> handler = newFrame(oldFrame);
+                            handler.clearStack();
+                            handler.push(interpreter.newExceptionValue(tryCatchBlock, handler, catchType));
+                            merge(insnList.indexOf(tryCatchBlock.handler), handler, subroutine);
+                        }
+                    }
+                }
+            } catch (AnalyzerException e) {
+                throw new AnalyzerException(
+                        e.node, "Error at instruction " + insnIndex + ": " + e.getMessage(), e);
+            } catch (RuntimeException e) {
+                // DontCheck(IllegalCatch): can't be fixed, for backward compatibility.
+                throw new AnalyzerException(
+                        insnNode, "Error at instruction " + insnIndex + ": " + e.getMessage(), e);
+            }
+        }
+
+        return frames;
+    }
+
+    /**
+      * Analyzes the given method and computes and sets its maximum stack size and maximum number of
+      * local variables.
+      *
+      * @param owner the internal name of the class to which 'method' belongs (see {@link
+      *     Type#getInternalName()}).
+      * @param method the method to be analyzed.
+      * @return the symbolic state of the execution stack frame at each bytecode instruction of the
+      *     method. The size of the returned array is equal to the number of instructions (and labels)
+      *     of the method. A given frame is {@literal null} if and only if the corresponding
+      *     instruction cannot be reached (dead code).
+      * @throws AnalyzerException if a problem occurs during the analysis.
+      */
+    public Frame<V>[] analyzeAndComputeMaxs(final String owner, final MethodNode method)
+            throws AnalyzerException {
+        method.maxLocals = computeMaxLocals(method);
+        method.maxStack = -1;
+        analyze(owner, method);
+        method.maxStack = computeMaxStack(frames);
+        return frames;
+    }
+
+    /**
+      * Computes and returns the maximum number of local variables used in the given method.
+      *
+      * @param method a method.
+      * @return the maximum number of local variables used in the given method.
+      */
+    private static int computeMaxLocals(final MethodNode method) {
+        int maxLocals = Type.getArgumentsAndReturnSizes(method.desc) >> 2;
+        if ((method.access & Opcodes.ACC_STATIC) != 0) {
+            maxLocals -= 1;
+        }
+        for (AbstractInsnNode insnNode : method.instructions) {
+            if (insnNode instanceof VarInsnNode) {
+                int local = ((VarInsnNode) insnNode).var;
+                int size =
+                        (insnNode.getOpcode() == Opcodes.LLOAD
+                                        || insnNode.getOpcode() == Opcodes.DLOAD
+                                        || insnNode.getOpcode() == Opcodes.LSTORE
+                                        || insnNode.getOpcode() == Opcodes.DSTORE)
+                                ? 2
+                                : 1;
+                maxLocals = Math.max(maxLocals, local + size);
+            } else if (insnNode instanceof IincInsnNode) {
+                int local = ((IincInsnNode) insnNode).var;
+                maxLocals = Math.max(maxLocals, local + 1);
+            }
+        }
+        return maxLocals;
+    }
+
+    /**
+      * Computes and returns the maximum stack size of a method, given its stack map frames.
+      *
+      * @param frames the stack map frames of a method.
+      * @return the maximum stack size of the given method.
+      */
+    private static int computeMaxStack(final Frame<?>[] frames) {
+        int maxStack = 0;
+        for (Frame<?> frame : frames) {
+            if (frame != null) {
+                int stackSize = 0;
+                for (int i = 0; i < frame.getStackSize(); ++i) {
+                    stackSize += frame.getStack(i).getSize();
+                }
+                maxStack = Math.max(maxStack, stackSize);
+            }
+        }
+        return maxStack;
+    }
+
+    /**
+      * Finds the subroutines of the currently analyzed method and stores them in {@link #subroutines}.
+      *
+      * @param maxLocals the maximum number of local variables of the currently analyzed method (long
+      *     and double values count for two variables).
+      * @throws AnalyzerException if the control flow graph can fall off the end of the code.
+      */
+    private void findSubroutines(final int maxLocals) throws AnalyzerException {
+        // For each instruction, compute the subroutine to which it belongs.
+        // Follow the main 'subroutine', and collect the jsr instructions to nested subroutines.
+        Subroutine main = new Subroutine(null, maxLocals, null);
+        List<AbstractInsnNode> jsrInsns = new ArrayList<>();
+        findSubroutine(0, main, jsrInsns);
+        // Follow the nested subroutines, and collect their own nested subroutines, until all
+        // subroutines are found.
+        Map<LabelNode, Subroutine> jsrSubroutines = new HashMap<>();
+        while (!jsrInsns.isEmpty()) {
+            JumpInsnNode jsrInsn = (JumpInsnNode) jsrInsns.remove(0);
+            Subroutine subroutine = jsrSubroutines.get(jsrInsn.label);
+            if (subroutine == null) {
+                subroutine = new Subroutine(jsrInsn.label, maxLocals, jsrInsn);
+                jsrSubroutines.put(jsrInsn.label, subroutine);
+                findSubroutine(insnList.indexOf(jsrInsn.label), subroutine, jsrInsns);
+            } else {
+                subroutine.callers.add(jsrInsn);
+            }
+        }
+        // Clear the main 'subroutine', which is not a real subroutine (and was used only as an
+        // intermediate step above to find the real ones).
+        for (int i = 0; i < insnListSize; ++i) {
+            if (subroutines[i] != null && subroutines[i].start == null) {
+                subroutines[i] = null;
+            }
+        }
+    }
+
+    /**
+      * Follows the control flow graph of the currently analyzed method, starting at the given
+      * instruction index, and stores a copy of the given subroutine in {@link #subroutines} for each
+      * encountered instruction. Jumps to nested subroutines are <i>not</i> followed: instead, the
+      * corresponding instructions are put in the given list.
+      *
+      * @param insnIndex an instruction index.
+      * @param subroutine a subroutine.
+      * @param jsrInsns where the jsr instructions for nested subroutines must be put.
+      * @throws AnalyzerException if the control flow graph can fall off the end of the code.
+      */
+    private void findSubroutine(
+            final int insnIndex, final Subroutine subroutine, final List<AbstractInsnNode> jsrInsns)
+            throws AnalyzerException {
+        ArrayList<Integer> instructionIndicesToProcess = new ArrayList<>();
+        instructionIndicesToProcess.add(insnIndex);
+        while (!instructionIndicesToProcess.isEmpty()) {
+            int currentInsnIndex =
+                    instructionIndicesToProcess.remove(instructionIndicesToProcess.size() - 1);
+            if (currentInsnIndex < 0 || currentInsnIndex >= insnListSize) {
+                throw new AnalyzerException(null, "Execution can fall off the end of the code");
+            }
+            if (subroutines[currentInsnIndex] != null) {
+                continue;
+            }
+            subroutines[currentInsnIndex] = new Subroutine(subroutine);
+            AbstractInsnNode currentInsn = insnList.get(currentInsnIndex);
+
+            // Push the normal successors of currentInsn onto instructionIndicesToProcess.
+            if (currentInsn instanceof JumpInsnNode) {
+                if (currentInsn.getOpcode() == JSR) {
+                    // Do not follow a jsr, it leads to another subroutine!
+                    jsrInsns.add(currentInsn);
+                } else {
+                    JumpInsnNode jumpInsn = (JumpInsnNode) currentInsn;
+                    instructionIndicesToProcess.add(insnList.indexOf(jumpInsn.label));
+                }
+            } else if (currentInsn instanceof TableSwitchInsnNode) {
+                TableSwitchInsnNode tableSwitchInsn = (TableSwitchInsnNode) currentInsn;
+                findSubroutine(insnList.indexOf(tableSwitchInsn.dflt), subroutine, jsrInsns);
+                for (int i = tableSwitchInsn.labels.size() - 1; i >= 0; --i) {
+                    LabelNode labelNode = tableSwitchInsn.labels.get(i);
+                    instructionIndicesToProcess.add(insnList.indexOf(labelNode));
+                }
+            } else if (currentInsn instanceof LookupSwitchInsnNode) {
+                LookupSwitchInsnNode lookupSwitchInsn = (LookupSwitchInsnNode) currentInsn;
+                findSubroutine(insnList.indexOf(lookupSwitchInsn.dflt), subroutine, jsrInsns);
+                for (int i = lookupSwitchInsn.labels.size() - 1; i >= 0; --i) {
+                    LabelNode labelNode = lookupSwitchInsn.labels.get(i);
+                    instructionIndicesToProcess.add(insnList.indexOf(labelNode));
+                }
+            }
+
+            // Push the exception handler successors of currentInsn onto instructionIndicesToProcess.
+            List<TryCatchBlockNode> insnHandlers = handlers[currentInsnIndex];
+            if (insnHandlers != null) {
+                for (TryCatchBlockNode tryCatchBlock : insnHandlers) {
+                    instructionIndicesToProcess.add(insnList.indexOf(tryCatchBlock.handler));
+                }
+            }
+
+            // Push the next instruction, if the control flow can go from currentInsn to the next.
+            switch (currentInsn.getOpcode()) {
+                case GOTO:
+                case RET:
+                case TABLESWITCH:
+                case LOOKUPSWITCH:
+                case IRETURN:
+                case LRETURN:
+                case FRETURN:
+                case DRETURN:
+                case ARETURN:
+                case RETURN:
+                case ATHROW:
+                    break;
+                default:
+                    instructionIndicesToProcess.add(currentInsnIndex + 1);
+                    break;
+            }
+        }
+    }
+
+    /**
+      * Computes the initial execution stack frame of the given method.
+      *
+      * @param owner the internal name of the class to which 'method' belongs (see {@link
+      *     Type#getInternalName()}).
+      * @param method the method to be analyzed.
+      * @return the initial execution stack frame of the 'method'.
+      */
+    private Frame<V> computeInitialFrame(final String owner, final MethodNode method) {
+        Frame<V> frame = newFrame(method.maxLocals, method.maxStack);
+        int currentLocal = 0;
+        boolean isInstanceMethod = (method.access & ACC_STATIC) == 0;
+        if (isInstanceMethod) {
+            Type ownerType = Type.getObjectType(owner);
+            frame.setLocal(
+                    currentLocal, interpreter.newParameterValue(isInstanceMethod, currentLocal, ownerType));
+            currentLocal++;
+        }
+        Type[] argumentTypes = Type.getArgumentTypes(method.desc);
+        for (Type argumentType : argumentTypes) {
+            frame.setLocal(
+                    currentLocal,
+                    interpreter.newParameterValue(isInstanceMethod, currentLocal, argumentType));
+            currentLocal++;
+            if (argumentType.getSize() == 2) {
+                frame.setLocal(currentLocal, interpreter.newEmptyValue(currentLocal));
+                currentLocal++;
+            }
+        }
+        while (currentLocal < method.maxLocals) {
+            frame.setLocal(currentLocal, interpreter.newEmptyValue(currentLocal));
+            currentLocal++;
+        }
+        frame.setReturn(interpreter.newReturnTypeValue(Type.getReturnType(method.desc)));
+        return frame;
+    }
+
+    /**
+      * Returns the symbolic execution stack frame for each instruction of the last analyzed method.
+      *
+      * @return the symbolic state of the execution stack frame at each bytecode instruction of the
+      *     method. The size of the returned array is equal to the number of instructions (and labels)
+      *     of the method. A given frame is {@literal null} if the corresponding instruction cannot be
+      *     reached, or if an error occurred during the analysis of the method.
+      */
+    public Frame<V>[] getFrames() {
+        return frames;
+    }
+
+    /**
+      * Returns the exception handlers for the given instruction.
+      *
+      * @param insnIndex the index of an instruction of the last analyzed method.
+      * @return a list of {@link TryCatchBlockNode} objects.
+      */
+    public List<TryCatchBlockNode> getHandlers(final int insnIndex) {
+        return handlers[insnIndex];
+    }
+
+    /**
+      * Initializes this analyzer. This method is called just before the execution of control flow
+      * analysis loop in {@link #analyze}. The default implementation of this method does nothing.
+      *
+      * @param owner the internal name of the class to which the method belongs (see {@link
+      *     Type#getInternalName()}).
+      * @param method the method to be analyzed.
+      * @throws AnalyzerException if a problem occurs.
+      */
+    protected void init(final String owner, final MethodNode method) throws AnalyzerException {
+        // Nothing to do.
+    }
+
+    /**
+      * Constructs a new frame with the given size.
+      *
+      * @param numLocals the maximum number of local variables of the frame.
+      * @param numStack the maximum stack size of the frame.
+      * @return the created frame.
+      */
+    protected Frame<V> newFrame(final int numLocals, final int numStack) {
+        return new Frame<>(numLocals, numStack);
+    }
+
+    /**
+      * Constructs a copy of the given frame.
+      *
+      * @param frame a frame.
+      * @return the created frame.
+      */
+    protected Frame<V> newFrame(final Frame<? extends V> frame) {
+        return new Frame<>(frame);
+    }
+
+    /**
+      * Creates a control flow graph edge. The default implementation of this method does nothing. It
+      * can be overridden in order to construct the control flow graph of a method (this method is
+      * called by the {@link #analyze} method during its visit of the method's code).
+      *
+      * @param insnIndex an instruction index.
+      * @param successorIndex index of a successor instruction.
+      */
+    protected void newControlFlowEdge(final int insnIndex, final int successorIndex) {
+        // Nothing to do.
+    }
+
+    /**
+      * Creates a control flow graph edge corresponding to an exception handler. The default
+      * implementation of this method does nothing. It can be overridden in order to construct the
+      * control flow graph of a method (this method is called by the {@link #analyze} method during its
+      * visit of the method's code).
+      *
+      * @param insnIndex an instruction index.
+      * @param successorIndex index of a successor instruction.
+      * @return true if this edge must be considered in the data flow analysis performed by this
+      *     analyzer, or false otherwise. The default implementation of this method always returns
+      *     true.
+      */
+    protected boolean newControlFlowExceptionEdge(final int insnIndex, final int successorIndex) {
+        return true;
+    }
+
+    /**
+      * Creates a control flow graph edge corresponding to an exception handler. The default
+      * implementation of this method delegates to {@link #newControlFlowExceptionEdge(int, int)}. It
+      * can be overridden in order to construct the control flow graph of a method (this method is
+      * called by the {@link #analyze} method during its visit of the method's code).
+      *
+      * @param insnIndex an instruction index.
+      * @param tryCatchBlock TryCatchBlockNode corresponding to this edge.
+      * @return true if this edge must be considered in the data flow analysis performed by this
+      *     analyzer, or false otherwise. The default implementation of this method delegates to {@link
+      *     #newControlFlowExceptionEdge(int, int)}.
+      */
+    protected boolean newControlFlowExceptionEdge(
+            final int insnIndex, final TryCatchBlockNode tryCatchBlock) {
+        return newControlFlowExceptionEdge(insnIndex, insnList.indexOf(tryCatchBlock.handler));
+    }
+
+    // -----------------------------------------------------------------------------------------------
+
+    /**
+      * Merges the given frame and subroutine into the frame and subroutines at the given instruction
+      * index. If the frame or the subroutine at the given instruction index changes as a result of
+      * this merge, the instruction index is added to the list of instructions to process (if it is not
+      * already the case).
+      *
+      * @param insnIndex an instruction index.
+      * @param frame a frame. This frame is left unchanged by this method.
+      * @param subroutine a subroutine. This subroutine is left unchanged by this method.
+      * @throws AnalyzerException if the frames have incompatible sizes.
+      */
+    private void merge(final int insnIndex, final Frame<V> frame, final Subroutine subroutine)
+            throws AnalyzerException {
+        boolean changed;
+        Frame<V> oldFrame = frames[insnIndex];
+        if (oldFrame == null) {
+            frames[insnIndex] = newFrame(frame);
+            changed = true;
+        } else {
+            changed = oldFrame.merge(frame, interpreter);
+        }
+        Subroutine oldSubroutine = subroutines[insnIndex];
+        if (oldSubroutine == null) {
+            if (subroutine != null) {
+                subroutines[insnIndex] = new Subroutine(subroutine);
+                changed = true;
+            }
+        } else {
+            if (subroutine != null) {
+                changed |= oldSubroutine.merge(subroutine);
+            }
+        }
+        if (changed && !inInstructionsToProcess[insnIndex]) {
+            inInstructionsToProcess[insnIndex] = true;
+            instructionsToProcess[numInstructionsToProcess++] = insnIndex;
+        }
+    }
+
+    /**
+      * Merges the given frame and subroutine into the frame and subroutines at the given instruction
+      * index (case of a RET instruction). If the frame or the subroutine at the given instruction
+      * index changes as a result of this merge, the instruction index is added to the list of
+      * instructions to process (if it is not already the case).
+      *
+      * @param insnIndex the index of an instruction immediately following a jsr instruction.
+      * @param frameBeforeJsr the execution stack frame before the jsr instruction. This frame is
+      *     merged into 'frameAfterRet'.
+      * @param frameAfterRet the execution stack frame after a ret instruction of the subroutine. This
+      *     frame is merged into the frame at 'insnIndex' (after it has itself been merge with
+      *     'frameBeforeJsr').
+      * @param subroutineBeforeJsr if the jsr is itself part of a subroutine (case of nested
+      *     subroutine), the subroutine it belongs to.
+      * @param localsUsed the local variables read or written in the subroutine.
+      * @throws AnalyzerException if the frames have incompatible sizes.
+      */
+    private void merge(
+            final int insnIndex,
+            final Frame<V> frameBeforeJsr,
+            final Frame<V> frameAfterRet,
+            final Subroutine subroutineBeforeJsr,
+            final boolean[] localsUsed)
+            throws AnalyzerException {
+        frameAfterRet.merge(frameBeforeJsr, localsUsed);
+
+        boolean changed;
+        Frame<V> oldFrame = frames[insnIndex];
+        if (oldFrame == null) {
+            frames[insnIndex] = newFrame(frameAfterRet);
+            changed = true;
+        } else {
+            changed = oldFrame.merge(frameAfterRet, interpreter);
+        }
+        Subroutine oldSubroutine = subroutines[insnIndex];
+        if (oldSubroutine != null && subroutineBeforeJsr != null) {
+            changed |= oldSubroutine.merge(subroutineBeforeJsr);
+        }
+        if (changed && !inInstructionsToProcess[insnIndex]) {
+            inInstructionsToProcess[insnIndex] = true;
+            instructionsToProcess[numInstructionsToProcess++] = insnIndex;
+        }
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/org/objectweb/asm/tree/analysis/AnalyzerException.class b/tests/test_data/std/jdk/internal/org/objectweb/asm/tree/analysis/AnalyzerException.class
new file mode 100644
index 0000000000000000000000000000000000000000..9c099051e85a7cfdbb142b9ba1e0eac1db19000e
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diff --git a/tests/test_data/std/jdk/internal/org/objectweb/asm/tree/analysis/AnalyzerException.java b/tests/test_data/std/jdk/internal/org/objectweb/asm/tree/analysis/AnalyzerException.java
new file mode 100644
index 00000000..5101b2f5
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/org/objectweb/asm/tree/analysis/AnalyzerException.java
@@ -0,0 +1,121 @@
+/*
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/*
+ * This file is available under and governed by the GNU General Public
+ * License version 2 only, as published by the Free Software Foundation.
+ * However, the following notice accompanied the original version of this
+ * file:
+ *
+ * ASM: a very small and fast Java bytecode manipulation framework
+ * Copyright (c) 2000-2011 INRIA, France Telecom
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the copyright holders nor the names of its
+ *    contributors may be used to endorse or promote products derived from
+ *    this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+package jdk.internal.org.objectweb.asm.tree.analysis;
+
+import jdk.internal.org.objectweb.asm.tree.AbstractInsnNode;
+
+/**
+ * An exception thrown if a problem occurs during the analysis of a method.
+ *
+ * @author Bing Ran
+ * @author Eric Bruneton
+ */
+public class AnalyzerException extends Exception {
+
+    private static final long serialVersionUID = 3154190448018943333L;
+
+    /** The bytecode instruction where the analysis failed. */
+    public final transient AbstractInsnNode node;
+
+    /**
+      * Constructs a new {@link AnalyzerException}.
+      *
+      * @param insn the bytecode instruction where the analysis failed.
+      * @param message the reason why the analysis failed.
+      */
+    public AnalyzerException(final AbstractInsnNode insn, final String message) {
+        super(message);
+        this.node = insn;
+    }
+
+    /**
+      * Constructs a new {@link AnalyzerException}.
+      *
+      * @param insn the bytecode instruction where the analysis failed.
+      * @param message the reason why the analysis failed.
+      * @param cause the cause of the failure.
+      */
+    public AnalyzerException(
+            final AbstractInsnNode insn, final String message, final Throwable cause) {
+        super(message, cause);
+        this.node = insn;
+    }
+
+    /**
+      * Constructs a new {@link AnalyzerException}.
+      *
+      * @param insn the bytecode instruction where the analysis failed.
+      * @param message the reason why the analysis failed.
+      * @param expected an expected value.
+      * @param actual the actual value, different from the expected one.
+      */
+    public AnalyzerException(
+            final AbstractInsnNode insn,
+            final String message,
+            final Object expected,
+            final Value actual) {
+        super(
+                (message == null ? "Expected " : message + ": expected ")
+                        + expected
+                        + ", but found "
+                        + actual);
+        this.node = insn;
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/org/objectweb/asm/tree/analysis/BasicInterpreter.class b/tests/test_data/std/jdk/internal/org/objectweb/asm/tree/analysis/BasicInterpreter.class
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/org/objectweb/asm/tree/analysis/BasicInterpreter.java b/tests/test_data/std/jdk/internal/org/objectweb/asm/tree/analysis/BasicInterpreter.java
new file mode 100644
index 00000000..7dee3af4
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/org/objectweb/asm/tree/analysis/BasicInterpreter.java
@@ -0,0 +1,407 @@
+/*
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/*
+ * This file is available under and governed by the GNU General Public
+ * License version 2 only, as published by the Free Software Foundation.
+ * However, the following notice accompanied the original version of this
+ * file:
+ *
+ * ASM: a very small and fast Java bytecode manipulation framework
+ * Copyright (c) 2000-2011 INRIA, France Telecom
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the copyright holders nor the names of its
+ *    contributors may be used to endorse or promote products derived from
+ *    this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+package jdk.internal.org.objectweb.asm.tree.analysis;
+
+import java.util.List;
+import jdk.internal.org.objectweb.asm.ConstantDynamic;
+import jdk.internal.org.objectweb.asm.Handle;
+import jdk.internal.org.objectweb.asm.Opcodes;
+import jdk.internal.org.objectweb.asm.Type;
+import jdk.internal.org.objectweb.asm.tree.AbstractInsnNode;
+import jdk.internal.org.objectweb.asm.tree.FieldInsnNode;
+import jdk.internal.org.objectweb.asm.tree.IntInsnNode;
+import jdk.internal.org.objectweb.asm.tree.InvokeDynamicInsnNode;
+import jdk.internal.org.objectweb.asm.tree.LdcInsnNode;
+import jdk.internal.org.objectweb.asm.tree.MethodInsnNode;
+import jdk.internal.org.objectweb.asm.tree.MultiANewArrayInsnNode;
+import jdk.internal.org.objectweb.asm.tree.TypeInsnNode;
+
+/**
+ * An {@link Interpreter} for {@link BasicValue} values.
+ *
+ * @author Eric Bruneton
+ * @author Bing Ran
+ */
+public class BasicInterpreter extends Interpreter<BasicValue> implements Opcodes {
+
+    /**
+      * Special type used for the {@literal null} literal. This is an object reference type with
+      * descriptor 'Lnull;'.
+      */
+    public static final Type NULL_TYPE = Type.getObjectType("null");
+
+    /**
+      * Constructs a new {@link BasicInterpreter} for the latest ASM API version. <i>Subclasses must
+      * not use this constructor</i>. Instead, they must use the {@link #BasicInterpreter(int)}
+      * version.
+      */
+    public BasicInterpreter() {
+        super(/* latest api = */ ASM9);
+        if (getClass() != BasicInterpreter.class) {
+            throw new IllegalStateException();
+        }
+    }
+
+    /**
+      * Constructs a new {@link BasicInterpreter}.
+      *
+      * @param api the ASM API version supported by this interpreter. Must be one of the {@code
+      *     ASM}<i>x</i> values in {@link Opcodes}.
+      */
+    protected BasicInterpreter(final int api) {
+        super(api);
+    }
+
+    @Override
+    public BasicValue newValue(final Type type) {
+        if (type == null) {
+            return BasicValue.UNINITIALIZED_VALUE;
+        }
+        switch (type.getSort()) {
+            case Type.VOID:
+                return null;
+            case Type.BOOLEAN:
+            case Type.CHAR:
+            case Type.BYTE:
+            case Type.SHORT:
+            case Type.INT:
+                return BasicValue.INT_VALUE;
+            case Type.FLOAT:
+                return BasicValue.FLOAT_VALUE;
+            case Type.LONG:
+                return BasicValue.LONG_VALUE;
+            case Type.DOUBLE:
+                return BasicValue.DOUBLE_VALUE;
+            case Type.ARRAY:
+            case Type.OBJECT:
+                return BasicValue.REFERENCE_VALUE;
+            default:
+                throw new AssertionError();
+        }
+    }
+
+    @Override
+    public BasicValue newOperation(final AbstractInsnNode insn) throws AnalyzerException {
+        switch (insn.getOpcode()) {
+            case ACONST_NULL:
+                return newValue(NULL_TYPE);
+            case ICONST_M1:
+            case ICONST_0:
+            case ICONST_1:
+            case ICONST_2:
+            case ICONST_3:
+            case ICONST_4:
+            case ICONST_5:
+                return BasicValue.INT_VALUE;
+            case LCONST_0:
+            case LCONST_1:
+                return BasicValue.LONG_VALUE;
+            case FCONST_0:
+            case FCONST_1:
+            case FCONST_2:
+                return BasicValue.FLOAT_VALUE;
+            case DCONST_0:
+            case DCONST_1:
+                return BasicValue.DOUBLE_VALUE;
+            case BIPUSH:
+            case SIPUSH:
+                return BasicValue.INT_VALUE;
+            case LDC:
+                Object value = ((LdcInsnNode) insn).cst;
+                if (value instanceof Integer) {
+                    return BasicValue.INT_VALUE;
+                } else if (value instanceof Float) {
+                    return BasicValue.FLOAT_VALUE;
+                } else if (value instanceof Long) {
+                    return BasicValue.LONG_VALUE;
+                } else if (value instanceof Double) {
+                    return BasicValue.DOUBLE_VALUE;
+                } else if (value instanceof String) {
+                    return newValue(Type.getObjectType("java/lang/String"));
+                } else if (value instanceof Type) {
+                    int sort = ((Type) value).getSort();
+                    if (sort == Type.OBJECT || sort == Type.ARRAY) {
+                        return newValue(Type.getObjectType("java/lang/Class"));
+                    } else if (sort == Type.METHOD) {
+                        return newValue(Type.getObjectType("java/lang/invoke/MethodType"));
+                    } else {
+                        throw new AnalyzerException(insn, "Illegal LDC value " + value);
+                    }
+                } else if (value instanceof Handle) {
+                    return newValue(Type.getObjectType("java/lang/invoke/MethodHandle"));
+                } else if (value instanceof ConstantDynamic) {
+                    return newValue(Type.getType(((ConstantDynamic) value).getDescriptor()));
+                } else {
+                    throw new AnalyzerException(insn, "Illegal LDC value " + value);
+                }
+            case JSR:
+                return BasicValue.RETURNADDRESS_VALUE;
+            case GETSTATIC:
+                return newValue(Type.getType(((FieldInsnNode) insn).desc));
+            case NEW:
+                return newValue(Type.getObjectType(((TypeInsnNode) insn).desc));
+            default:
+                throw new AssertionError();
+        }
+    }
+
+    @Override
+    public BasicValue copyOperation(final AbstractInsnNode insn, final BasicValue value)
+            throws AnalyzerException {
+        return value;
+    }
+
+    @Override
+    public BasicValue unaryOperation(final AbstractInsnNode insn, final BasicValue value)
+            throws AnalyzerException {
+        switch (insn.getOpcode()) {
+            case INEG:
+            case IINC:
+            case L2I:
+            case F2I:
+            case D2I:
+            case I2B:
+            case I2C:
+            case I2S:
+                return BasicValue.INT_VALUE;
+            case FNEG:
+            case I2F:
+            case L2F:
+            case D2F:
+                return BasicValue.FLOAT_VALUE;
+            case LNEG:
+            case I2L:
+            case F2L:
+            case D2L:
+                return BasicValue.LONG_VALUE;
+            case DNEG:
+            case I2D:
+            case L2D:
+            case F2D:
+                return BasicValue.DOUBLE_VALUE;
+            case IFEQ:
+            case IFNE:
+            case IFLT:
+            case IFGE:
+            case IFGT:
+            case IFLE:
+            case TABLESWITCH:
+            case LOOKUPSWITCH:
+            case IRETURN:
+            case LRETURN:
+            case FRETURN:
+            case DRETURN:
+            case ARETURN:
+            case PUTSTATIC:
+                return null;
+            case GETFIELD:
+                return newValue(Type.getType(((FieldInsnNode) insn).desc));
+            case NEWARRAY:
+                switch (((IntInsnNode) insn).operand) {
+                    case T_BOOLEAN:
+                        return newValue(Type.getType("[Z"));
+                    case T_CHAR:
+                        return newValue(Type.getType("[C"));
+                    case T_BYTE:
+                        return newValue(Type.getType("[B"));
+                    case T_SHORT:
+                        return newValue(Type.getType("[S"));
+                    case T_INT:
+                        return newValue(Type.getType("[I"));
+                    case T_FLOAT:
+                        return newValue(Type.getType("[F"));
+                    case T_DOUBLE:
+                        return newValue(Type.getType("[D"));
+                    case T_LONG:
+                        return newValue(Type.getType("[J"));
+                    default:
+                        break;
+                }
+                throw new AnalyzerException(insn, "Invalid array type");
+            case ANEWARRAY:
+                return newValue(Type.getType("[" + Type.getObjectType(((TypeInsnNode) insn).desc)));
+            case ARRAYLENGTH:
+                return BasicValue.INT_VALUE;
+            case ATHROW:
+                return null;
+            case CHECKCAST:
+                return newValue(Type.getObjectType(((TypeInsnNode) insn).desc));
+            case INSTANCEOF:
+                return BasicValue.INT_VALUE;
+            case MONITORENTER:
+            case MONITOREXIT:
+            case IFNULL:
+            case IFNONNULL:
+                return null;
+            default:
+                throw new AssertionError();
+        }
+    }
+
+    @Override
+    public BasicValue binaryOperation(
+            final AbstractInsnNode insn, final BasicValue value1, final BasicValue value2)
+            throws AnalyzerException {
+        switch (insn.getOpcode()) {
+            case IALOAD:
+            case BALOAD:
+            case CALOAD:
+            case SALOAD:
+            case IADD:
+            case ISUB:
+            case IMUL:
+            case IDIV:
+            case IREM:
+            case ISHL:
+            case ISHR:
+            case IUSHR:
+            case IAND:
+            case IOR:
+            case IXOR:
+                return BasicValue.INT_VALUE;
+            case FALOAD:
+            case FADD:
+            case FSUB:
+            case FMUL:
+            case FDIV:
+            case FREM:
+                return BasicValue.FLOAT_VALUE;
+            case LALOAD:
+            case LADD:
+            case LSUB:
+            case LMUL:
+            case LDIV:
+            case LREM:
+            case LSHL:
+            case LSHR:
+            case LUSHR:
+            case LAND:
+            case LOR:
+            case LXOR:
+                return BasicValue.LONG_VALUE;
+            case DALOAD:
+            case DADD:
+            case DSUB:
+            case DMUL:
+            case DDIV:
+            case DREM:
+                return BasicValue.DOUBLE_VALUE;
+            case AALOAD:
+                return BasicValue.REFERENCE_VALUE;
+            case LCMP:
+            case FCMPL:
+            case FCMPG:
+            case DCMPL:
+            case DCMPG:
+                return BasicValue.INT_VALUE;
+            case IF_ICMPEQ:
+            case IF_ICMPNE:
+            case IF_ICMPLT:
+            case IF_ICMPGE:
+            case IF_ICMPGT:
+            case IF_ICMPLE:
+            case IF_ACMPEQ:
+            case IF_ACMPNE:
+            case PUTFIELD:
+                return null;
+            default:
+                throw new AssertionError();
+        }
+    }
+
+    @Override
+    public BasicValue ternaryOperation(
+            final AbstractInsnNode insn,
+            final BasicValue value1,
+            final BasicValue value2,
+            final BasicValue value3)
+            throws AnalyzerException {
+        return null;
+    }
+
+    @Override
+    public BasicValue naryOperation(
+            final AbstractInsnNode insn, final List<? extends BasicValue> values)
+            throws AnalyzerException {
+        int opcode = insn.getOpcode();
+        if (opcode == MULTIANEWARRAY) {
+            return newValue(Type.getType(((MultiANewArrayInsnNode) insn).desc));
+        } else if (opcode == INVOKEDYNAMIC) {
+            return newValue(Type.getReturnType(((InvokeDynamicInsnNode) insn).desc));
+        } else {
+            return newValue(Type.getReturnType(((MethodInsnNode) insn).desc));
+        }
+    }
+
+    @Override
+    public void returnOperation(
+            final AbstractInsnNode insn, final BasicValue value, final BasicValue expected)
+            throws AnalyzerException {
+        // Nothing to do.
+    }
+
+    @Override
+    public BasicValue merge(final BasicValue value1, final BasicValue value2) {
+        if (!value1.equals(value2)) {
+            return BasicValue.UNINITIALIZED_VALUE;
+        }
+        return value1;
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/org/objectweb/asm/tree/analysis/BasicValue.class b/tests/test_data/std/jdk/internal/org/objectweb/asm/tree/analysis/BasicValue.class
new file mode 100644
index 0000000000000000000000000000000000000000..d345de7434c675573c0414c37e56924955bad7a8
GIT binary patch
literal 2128
zcma)7+fy4=82_DI*iBe22B?K9^kOI^O0=!i8mt78w9##XxmjoxmvjqD(*%=Hr#|@N
zZJhC;<BL`u^+o!^1ERK$&N%v_GyYMI-*?Vp12YOQ`(4g=e&7A<Uw{AnD}Y&4g7Cnr
z!Dqma4uRfP>y{O(TD9d^ZfVu7v;;b)oSM@*FW?;;F9)C_pdo0W6NbRq)oV9mPOW7(
zYF0H?Z!E{^^444SQp{@JjI|oJ9kb}{cGGFbW~`=DDO=TbTfo=4y+$N#?t@Syvv>gA
z=+V$?;1TwE;sAF90%k6IVX-(rm*VSv2KxDKXEIlsF;h|>B>f=+kK(X^wrsZw^#<ij
zX=eCj$iNXiM)})su3Ocnz`&Tfw>t6h1vVWvFv1}Eiq%}1tzWabOvely#|eSHQZ|##
z6f+4kvye(ImJ?<vC2(%P#Q&>waUEd+F~KfQ8W@u<@~L7epG_o_`Bb5xT<D09S%S@;
zH1HIg_2g6OR6doRP3@S($Ry7hJY(P#P78EV8IpFh(s0&V^@c$I*mzsgg;v9<Eysg|
z`7962q`(*z<^N|uc918h8_yXy$4$^P*`nJS9dQFw99@8wvN~*f-oT4&8cdtH#6#nR
zff+XLRBG2;N76uw^+DP6f7KTZTx7N3c3mFm@Nvp78!&N6rL1P1Bc;x?x7p2@ig17=
zIqsZ+IgUF}&SjD^M-6#_Q~TWC-R+$n;ZdTtnNH2luHRg;8%1lWN}7;auUOTx)o@sL
zmA=-BLsQCwtP(lNy*ohI?(jQr6LMFfWmRrmvesPCPN$i-uiFi~R-sc`jRgV!Ew#d-
zw#iThj8kh{byYKBrz%zV=?E6;>y3(?b~yT;hws1yFBFc^Jb57S3eiDc8hV-rc_<{M
zeoIRIm6RGPDUGzGv;jmz{2&q435N!gz6FxfgzF(1j68sdM1O?#9Z4P(>Dvu2eXqlZ
zWdyK-5=n=YHOdl`?nzWy61<AbE@q6VAX|Ur2WVTwD7X%(T$3<{GH_u8=5d%b9MBwD
z^W`DFyp67J(WSW11~mUY_<Wmm>XiX1#Pv4BAs2ChY&ziW_fB&tS8&xuzv7~Y8S@W}
zFu9L`-r(2h+2I4<K=Y9!?_Njmv^fgzb~K_K(R1iJx<ih*u9MNo2K>Iw=<m?)Vw`>a
ziN5G>&?V<OVzsNgkHO70&%@9N<z4F7d&Ip@J^26w_z+=ygfsZKttXRiMC22%;dP3G
zi=e}=9hnw%Pw)%uMt6}Y7r9Txqj~Sq0LW52zBlPl+LG>TOWF@lXPQwKaoR;~y2Txh
zY~$z#Izmru5jV=*ICD|vCbpELr+F|`8&!^<QhuM&Jl&;V*yr>s`htEgUt$<vwFNM`
zD*$gWz>oJE)M+(4cjUkVSAT&%FCO5`_c+SzHqJ`nc_q9cg=r;pNnutAAt|I;2xWf4
wOHz!gv#b<Gc|C-jzT@N@$j}0qRM;G~Bu~GH61~co>8YJZR!*HoHXbbf16b{+MgRZ+

literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/org/objectweb/asm/tree/analysis/BasicValue.java b/tests/test_data/std/jdk/internal/org/objectweb/asm/tree/analysis/BasicValue.java
new file mode 100644
index 00000000..3d854f63
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/org/objectweb/asm/tree/analysis/BasicValue.java
@@ -0,0 +1,161 @@
+/*
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/*
+ * This file is available under and governed by the GNU General Public
+ * License version 2 only, as published by the Free Software Foundation.
+ * However, the following notice accompanied the original version of this
+ * file:
+ *
+ * ASM: a very small and fast Java bytecode manipulation framework
+ * Copyright (c) 2000-2011 INRIA, France Telecom
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the copyright holders nor the names of its
+ *    contributors may be used to endorse or promote products derived from
+ *    this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+package jdk.internal.org.objectweb.asm.tree.analysis;
+
+import jdk.internal.org.objectweb.asm.Type;
+
+/**
+ * A {@link Value} that is represented with its type in a seven types type system. This type system
+ * distinguishes the UNINITIALZED, INT, FLOAT, LONG, DOUBLE, REFERENCE and RETURNADDRESS types.
+ *
+ * @author Eric Bruneton
+ */
+public class BasicValue implements Value {
+
+    /** An uninitialized value. */
+    public static final BasicValue UNINITIALIZED_VALUE = new BasicValue(null);
+
+    /** A byte, boolean, char, short, or int value. */
+    public static final BasicValue INT_VALUE = new BasicValue(Type.INT_TYPE);
+
+    /** A float value. */
+    public static final BasicValue FLOAT_VALUE = new BasicValue(Type.FLOAT_TYPE);
+
+    /** A long value. */
+    public static final BasicValue LONG_VALUE = new BasicValue(Type.LONG_TYPE);
+
+    /** A double value. */
+    public static final BasicValue DOUBLE_VALUE = new BasicValue(Type.DOUBLE_TYPE);
+
+    /** An object or array reference value. */
+    public static final BasicValue REFERENCE_VALUE =
+            new BasicValue(Type.getObjectType("java/lang/Object"));
+
+    /** A return address value (produced by a jsr instruction). */
+    public static final BasicValue RETURNADDRESS_VALUE = new BasicValue(Type.VOID_TYPE);
+
+    /** The {@link Type} of this value, or {@literal null} for uninitialized values. */
+    private final Type type;
+
+    /**
+      * Constructs a new {@link BasicValue} of the given type.
+      *
+      * @param type the value type.
+      */
+    public BasicValue(final Type type) {
+        this.type = type;
+    }
+
+    /**
+      * Returns the {@link Type} of this value.
+      *
+      * @return the {@link Type} of this value.
+      */
+    public Type getType() {
+        return type;
+    }
+
+    @Override
+    public int getSize() {
+        return type == Type.LONG_TYPE || type == Type.DOUBLE_TYPE ? 2 : 1;
+    }
+
+    /**
+      * Returns whether this value corresponds to an object or array reference.
+      *
+      * @return whether this value corresponds to an object or array reference.
+      */
+    public boolean isReference() {
+        return type != null && (type.getSort() == Type.OBJECT || type.getSort() == Type.ARRAY);
+    }
+
+    @Override
+    public boolean equals(final Object value) {
+        if (value == this) {
+            return true;
+        } else if (value instanceof BasicValue) {
+            if (type == null) {
+                return ((BasicValue) value).type == null;
+            } else {
+                return type.equals(((BasicValue) value).type);
+            }
+        } else {
+            return false;
+        }
+    }
+
+    @Override
+    public int hashCode() {
+        return type == null ? 0 : type.hashCode();
+    }
+
+    @Override
+    public String toString() {
+        if (this == UNINITIALIZED_VALUE) {
+            return ".";
+        } else if (this == RETURNADDRESS_VALUE) {
+            return "A";
+        } else if (this == REFERENCE_VALUE) {
+            return "R";
+        } else {
+            return type.getDescriptor();
+        }
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/org/objectweb/asm/tree/analysis/BasicVerifier.class b/tests/test_data/std/jdk/internal/org/objectweb/asm/tree/analysis/BasicVerifier.class
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diff --git a/tests/test_data/std/jdk/internal/org/objectweb/asm/tree/analysis/BasicVerifier.java b/tests/test_data/std/jdk/internal/org/objectweb/asm/tree/analysis/BasicVerifier.java
new file mode 100644
index 00000000..ebe738fe
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/org/objectweb/asm/tree/analysis/BasicVerifier.java
@@ -0,0 +1,482 @@
+/*
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/*
+ * This file is available under and governed by the GNU General Public
+ * License version 2 only, as published by the Free Software Foundation.
+ * However, the following notice accompanied the original version of this
+ * file:
+ *
+ * ASM: a very small and fast Java bytecode manipulation framework
+ * Copyright (c) 2000-2011 INRIA, France Telecom
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the copyright holders nor the names of its
+ *    contributors may be used to endorse or promote products derived from
+ *    this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+package jdk.internal.org.objectweb.asm.tree.analysis;
+
+import java.util.List;
+import jdk.internal.org.objectweb.asm.Opcodes;
+import jdk.internal.org.objectweb.asm.Type;
+import jdk.internal.org.objectweb.asm.tree.AbstractInsnNode;
+import jdk.internal.org.objectweb.asm.tree.FieldInsnNode;
+import jdk.internal.org.objectweb.asm.tree.InvokeDynamicInsnNode;
+import jdk.internal.org.objectweb.asm.tree.MethodInsnNode;
+
+/**
+ * An extended {@link BasicInterpreter} that checks that bytecode instructions are correctly used.
+ *
+ * @author Eric Bruneton
+ * @author Bing Ran
+ */
+public class BasicVerifier extends BasicInterpreter {
+
+    /**
+      * Constructs a new {@link BasicVerifier} for the latest ASM API version. <i>Subclasses must not
+      * use this constructor</i>. Instead, they must use the {@link #BasicVerifier(int)} version.
+      */
+    public BasicVerifier() {
+        super(/* latest api = */ ASM9);
+        if (getClass() != BasicVerifier.class) {
+            throw new IllegalStateException();
+        }
+    }
+
+    /**
+      * Constructs a new {@link BasicVerifier}.
+      *
+      * @param api the ASM API version supported by this interpreter. Must be one of the {@code
+      *     ASM}<i>x</i> values in {@link Opcodes}.
+      */
+    protected BasicVerifier(final int api) {
+        super(api);
+    }
+
+    @Override
+    public BasicValue copyOperation(final AbstractInsnNode insn, final BasicValue value)
+            throws AnalyzerException {
+        Value expected;
+        switch (insn.getOpcode()) {
+            case ILOAD:
+            case ISTORE:
+                expected = BasicValue.INT_VALUE;
+                break;
+            case FLOAD:
+            case FSTORE:
+                expected = BasicValue.FLOAT_VALUE;
+                break;
+            case LLOAD:
+            case LSTORE:
+                expected = BasicValue.LONG_VALUE;
+                break;
+            case DLOAD:
+            case DSTORE:
+                expected = BasicValue.DOUBLE_VALUE;
+                break;
+            case ALOAD:
+                if (!value.isReference()) {
+                    throw new AnalyzerException(insn, null, "an object reference", value);
+                }
+                return value;
+            case ASTORE:
+                if (!value.isReference() && !BasicValue.RETURNADDRESS_VALUE.equals(value)) {
+                    throw new AnalyzerException(insn, null, "an object reference or a return address", value);
+                }
+                return value;
+            default:
+                return value;
+        }
+        if (!expected.equals(value)) {
+            throw new AnalyzerException(insn, null, expected, value);
+        }
+        return value;
+    }
+
+    @Override
+    public BasicValue unaryOperation(final AbstractInsnNode insn, final BasicValue value)
+            throws AnalyzerException {
+        BasicValue expected;
+        switch (insn.getOpcode()) {
+            case INEG:
+            case IINC:
+            case I2F:
+            case I2L:
+            case I2D:
+            case I2B:
+            case I2C:
+            case I2S:
+            case IFEQ:
+            case IFNE:
+            case IFLT:
+            case IFGE:
+            case IFGT:
+            case IFLE:
+            case TABLESWITCH:
+            case LOOKUPSWITCH:
+            case IRETURN:
+            case NEWARRAY:
+            case ANEWARRAY:
+                expected = BasicValue.INT_VALUE;
+                break;
+            case FNEG:
+            case F2I:
+            case F2L:
+            case F2D:
+            case FRETURN:
+                expected = BasicValue.FLOAT_VALUE;
+                break;
+            case LNEG:
+            case L2I:
+            case L2F:
+            case L2D:
+            case LRETURN:
+                expected = BasicValue.LONG_VALUE;
+                break;
+            case DNEG:
+            case D2I:
+            case D2F:
+            case D2L:
+            case DRETURN:
+                expected = BasicValue.DOUBLE_VALUE;
+                break;
+            case GETFIELD:
+                expected = newValue(Type.getObjectType(((FieldInsnNode) insn).owner));
+                break;
+            case ARRAYLENGTH:
+                if (!isArrayValue(value)) {
+                    throw new AnalyzerException(insn, null, "an array reference", value);
+                }
+                return super.unaryOperation(insn, value);
+            case CHECKCAST:
+            case ARETURN:
+            case ATHROW:
+            case INSTANCEOF:
+            case MONITORENTER:
+            case MONITOREXIT:
+            case IFNULL:
+            case IFNONNULL:
+                if (!value.isReference()) {
+                    throw new AnalyzerException(insn, null, "an object reference", value);
+                }
+                return super.unaryOperation(insn, value);
+            case PUTSTATIC:
+                expected = newValue(Type.getType(((FieldInsnNode) insn).desc));
+                break;
+            default:
+                throw new AssertionError();
+        }
+        if (!isSubTypeOf(value, expected)) {
+            throw new AnalyzerException(insn, null, expected, value);
+        }
+        return super.unaryOperation(insn, value);
+    }
+
+    @Override
+    public BasicValue binaryOperation(
+            final AbstractInsnNode insn, final BasicValue value1, final BasicValue value2)
+            throws AnalyzerException {
+        BasicValue expected1;
+        BasicValue expected2;
+        switch (insn.getOpcode()) {
+            case IALOAD:
+                expected1 = newValue(Type.getType("[I"));
+                expected2 = BasicValue.INT_VALUE;
+                break;
+            case BALOAD:
+                if (isSubTypeOf(value1, newValue(Type.getType("[Z")))) {
+                    expected1 = newValue(Type.getType("[Z"));
+                } else {
+                    expected1 = newValue(Type.getType("[B"));
+                }
+                expected2 = BasicValue.INT_VALUE;
+                break;
+            case CALOAD:
+                expected1 = newValue(Type.getType("[C"));
+                expected2 = BasicValue.INT_VALUE;
+                break;
+            case SALOAD:
+                expected1 = newValue(Type.getType("[S"));
+                expected2 = BasicValue.INT_VALUE;
+                break;
+            case LALOAD:
+                expected1 = newValue(Type.getType("[J"));
+                expected2 = BasicValue.INT_VALUE;
+                break;
+            case FALOAD:
+                expected1 = newValue(Type.getType("[F"));
+                expected2 = BasicValue.INT_VALUE;
+                break;
+            case DALOAD:
+                expected1 = newValue(Type.getType("[D"));
+                expected2 = BasicValue.INT_VALUE;
+                break;
+            case AALOAD:
+                expected1 = newValue(Type.getType("[Ljava/lang/Object;"));
+                expected2 = BasicValue.INT_VALUE;
+                break;
+            case IADD:
+            case ISUB:
+            case IMUL:
+            case IDIV:
+            case IREM:
+            case ISHL:
+            case ISHR:
+            case IUSHR:
+            case IAND:
+            case IOR:
+            case IXOR:
+            case IF_ICMPEQ:
+            case IF_ICMPNE:
+            case IF_ICMPLT:
+            case IF_ICMPGE:
+            case IF_ICMPGT:
+            case IF_ICMPLE:
+                expected1 = BasicValue.INT_VALUE;
+                expected2 = BasicValue.INT_VALUE;
+                break;
+            case FADD:
+            case FSUB:
+            case FMUL:
+            case FDIV:
+            case FREM:
+            case FCMPL:
+            case FCMPG:
+                expected1 = BasicValue.FLOAT_VALUE;
+                expected2 = BasicValue.FLOAT_VALUE;
+                break;
+            case LADD:
+            case LSUB:
+            case LMUL:
+            case LDIV:
+            case LREM:
+            case LAND:
+            case LOR:
+            case LXOR:
+            case LCMP:
+                expected1 = BasicValue.LONG_VALUE;
+                expected2 = BasicValue.LONG_VALUE;
+                break;
+            case LSHL:
+            case LSHR:
+            case LUSHR:
+                expected1 = BasicValue.LONG_VALUE;
+                expected2 = BasicValue.INT_VALUE;
+                break;
+            case DADD:
+            case DSUB:
+            case DMUL:
+            case DDIV:
+            case DREM:
+            case DCMPL:
+            case DCMPG:
+                expected1 = BasicValue.DOUBLE_VALUE;
+                expected2 = BasicValue.DOUBLE_VALUE;
+                break;
+            case IF_ACMPEQ:
+            case IF_ACMPNE:
+                expected1 = BasicValue.REFERENCE_VALUE;
+                expected2 = BasicValue.REFERENCE_VALUE;
+                break;
+            case PUTFIELD:
+                FieldInsnNode fieldInsn = (FieldInsnNode) insn;
+                expected1 = newValue(Type.getObjectType(fieldInsn.owner));
+                expected2 = newValue(Type.getType(fieldInsn.desc));
+                break;
+            default:
+                throw new AssertionError();
+        }
+        if (!isSubTypeOf(value1, expected1)) {
+            throw new AnalyzerException(insn, "First argument", expected1, value1);
+        } else if (!isSubTypeOf(value2, expected2)) {
+            throw new AnalyzerException(insn, "Second argument", expected2, value2);
+        }
+        if (insn.getOpcode() == AALOAD) {
+            return getElementValue(value1);
+        } else {
+            return super.binaryOperation(insn, value1, value2);
+        }
+    }
+
+    @Override
+    public BasicValue ternaryOperation(
+            final AbstractInsnNode insn,
+            final BasicValue value1,
+            final BasicValue value2,
+            final BasicValue value3)
+            throws AnalyzerException {
+        BasicValue expected1;
+        BasicValue expected3;
+        switch (insn.getOpcode()) {
+            case IASTORE:
+                expected1 = newValue(Type.getType("[I"));
+                expected3 = BasicValue.INT_VALUE;
+                break;
+            case BASTORE:
+                if (isSubTypeOf(value1, newValue(Type.getType("[Z")))) {
+                    expected1 = newValue(Type.getType("[Z"));
+                } else {
+                    expected1 = newValue(Type.getType("[B"));
+                }
+                expected3 = BasicValue.INT_VALUE;
+                break;
+            case CASTORE:
+                expected1 = newValue(Type.getType("[C"));
+                expected3 = BasicValue.INT_VALUE;
+                break;
+            case SASTORE:
+                expected1 = newValue(Type.getType("[S"));
+                expected3 = BasicValue.INT_VALUE;
+                break;
+            case LASTORE:
+                expected1 = newValue(Type.getType("[J"));
+                expected3 = BasicValue.LONG_VALUE;
+                break;
+            case FASTORE:
+                expected1 = newValue(Type.getType("[F"));
+                expected3 = BasicValue.FLOAT_VALUE;
+                break;
+            case DASTORE:
+                expected1 = newValue(Type.getType("[D"));
+                expected3 = BasicValue.DOUBLE_VALUE;
+                break;
+            case AASTORE:
+                expected1 = value1;
+                expected3 = BasicValue.REFERENCE_VALUE;
+                break;
+            default:
+                throw new AssertionError();
+        }
+        if (!isSubTypeOf(value1, expected1)) {
+            throw new AnalyzerException(
+                    insn, "First argument", "a " + expected1 + " array reference", value1);
+        } else if (!BasicValue.INT_VALUE.equals(value2)) {
+            throw new AnalyzerException(insn, "Second argument", BasicValue.INT_VALUE, value2);
+        } else if (!isSubTypeOf(value3, expected3)) {
+            throw new AnalyzerException(insn, "Third argument", expected3, value3);
+        }
+        return null;
+    }
+
+    @Override
+    public BasicValue naryOperation(
+            final AbstractInsnNode insn, final List<? extends BasicValue> values)
+            throws AnalyzerException {
+        int opcode = insn.getOpcode();
+        if (opcode == MULTIANEWARRAY) {
+            for (BasicValue value : values) {
+                if (!BasicValue.INT_VALUE.equals(value)) {
+                    throw new AnalyzerException(insn, null, BasicValue.INT_VALUE, value);
+                }
+            }
+        } else {
+            int i = 0;
+            int j = 0;
+            if (opcode != INVOKESTATIC && opcode != INVOKEDYNAMIC) {
+                Type owner = Type.getObjectType(((MethodInsnNode) insn).owner);
+                if (!isSubTypeOf(values.get(i++), newValue(owner))) {
+                    throw new AnalyzerException(insn, "Method owner", newValue(owner), values.get(0));
+                }
+            }
+            String methodDescriptor =
+                    (opcode == INVOKEDYNAMIC)
+                            ? ((InvokeDynamicInsnNode) insn).desc
+                            : ((MethodInsnNode) insn).desc;
+            Type[] args = Type.getArgumentTypes(methodDescriptor);
+            while (i < values.size()) {
+                BasicValue expected = newValue(args[j++]);
+                BasicValue actual = values.get(i++);
+                if (!isSubTypeOf(actual, expected)) {
+                    throw new AnalyzerException(insn, "Argument " + j, expected, actual);
+                }
+            }
+        }
+        return super.naryOperation(insn, values);
+    }
+
+    @Override
+    public void returnOperation(
+            final AbstractInsnNode insn, final BasicValue value, final BasicValue expected)
+            throws AnalyzerException {
+        if (!isSubTypeOf(value, expected)) {
+            throw new AnalyzerException(insn, "Incompatible return type", expected, value);
+        }
+    }
+
+    /**
+      * Returns whether the given value corresponds to an array reference.
+      *
+      * @param value a value.
+      * @return whether 'value' corresponds to an array reference.
+      */
+    protected boolean isArrayValue(final BasicValue value) {
+        return value.isReference();
+    }
+
+    /**
+      * Returns the value corresponding to the type of the elements of the given array reference value.
+      *
+      * @param objectArrayValue a value corresponding to array of object (or array) references.
+      * @return the value corresponding to the type of the elements of 'objectArrayValue'.
+      * @throws AnalyzerException if objectArrayValue does not correspond to an array type.
+      */
+    protected BasicValue getElementValue(final BasicValue objectArrayValue) throws AnalyzerException {
+        return BasicValue.REFERENCE_VALUE;
+    }
+
+    /**
+      * Returns whether the type corresponding to the first argument is a subtype of the type
+      * corresponding to the second argument.
+      *
+      * @param value a value.
+      * @param expected another value.
+      * @return whether the type corresponding to 'value' is a subtype of the type corresponding to
+      *     'expected'.
+      */
+    protected boolean isSubTypeOf(final BasicValue value, final BasicValue expected) {
+        return value.equals(expected);
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/org/objectweb/asm/tree/analysis/Frame.class b/tests/test_data/std/jdk/internal/org/objectweb/asm/tree/analysis/Frame.class
new file mode 100644
index 0000000000000000000000000000000000000000..cda5f485c3a0182b0acd935dddfb29fcad30f97f
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/org/objectweb/asm/tree/analysis/Frame.java b/tests/test_data/std/jdk/internal/org/objectweb/asm/tree/analysis/Frame.java
new file mode 100644
index 00000000..5940c9ed
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/org/objectweb/asm/tree/analysis/Frame.java
@@ -0,0 +1,784 @@
+/*
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/*
+ * This file is available under and governed by the GNU General Public
+ * License version 2 only, as published by the Free Software Foundation.
+ * However, the following notice accompanied the original version of this
+ * file:
+ *
+ * ASM: a very small and fast Java bytecode manipulation framework
+ * Copyright (c) 2000-2011 INRIA, France Telecom
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the copyright holders nor the names of its
+ *    contributors may be used to endorse or promote products derived from
+ *    this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+package jdk.internal.org.objectweb.asm.tree.analysis;
+
+import java.util.ArrayList;
+import java.util.List;
+import jdk.internal.org.objectweb.asm.Opcodes;
+import jdk.internal.org.objectweb.asm.Type;
+import jdk.internal.org.objectweb.asm.tree.AbstractInsnNode;
+import jdk.internal.org.objectweb.asm.tree.IincInsnNode;
+import jdk.internal.org.objectweb.asm.tree.InvokeDynamicInsnNode;
+import jdk.internal.org.objectweb.asm.tree.LabelNode;
+import jdk.internal.org.objectweb.asm.tree.MethodInsnNode;
+import jdk.internal.org.objectweb.asm.tree.MultiANewArrayInsnNode;
+import jdk.internal.org.objectweb.asm.tree.VarInsnNode;
+
+/**
+ * A symbolic execution stack frame. A stack frame contains a set of local variable slots, and an
+ * operand stack. Warning: long and double values are represented with <i>two</i> slots in local
+ * variables, and with <i>one</i> slot in the operand stack.
+ *
+ * @param <V> type of the Value used for the analysis.
+ * @author Eric Bruneton
+ */
+public class Frame<V extends Value> {
+
+    /** The maximum size of the operand stack of any method. */
+    private static final int MAX_STACK_SIZE = 65536;
+
+    /**
+      * The expected return type of the analyzed method, or {@literal null} if the method returns void.
+      */
+    private V returnValue;
+
+    /**
+      * The local variables and the operand stack of this frame. The first {@link #numLocals} elements
+      * correspond to the local variables. The following {@link #numStack} elements correspond to the
+      * operand stack. Long and double values are represented with two elements in the local variables
+      * section, and with one element in the operand stack section.
+      */
+    private V[] values;
+
+    /**
+      * The number of local variables of this frame. Long and double values are represented with two
+      * elements.
+      */
+    private int numLocals;
+
+    /**
+      * The number of elements in the operand stack. Long and double values are represented with a
+      * single element.
+      */
+    private int numStack;
+
+    /**
+      * The maximum number of elements in the operand stack. Long and double values are represented
+      * with a single element.
+      */
+    private int maxStack;
+
+    /**
+      * Constructs a new frame with the given size.
+      *
+      * @param numLocals the number of local variables of the frame. Long and double values are
+      *     represented with two elements.
+      * @param maxStack the maximum number of elements in the operand stack, or -1 if there is no
+      *     maximum value. Long and double values are represented with a single element.
+      */
+    @SuppressWarnings("unchecked")
+    public Frame(final int numLocals, final int maxStack) {
+        this.values = (V[]) new Value[numLocals + (maxStack >= 0 ? maxStack : 4)];
+        this.numLocals = numLocals;
+        this.numStack = 0;
+        this.maxStack = maxStack >= 0 ? maxStack : MAX_STACK_SIZE;
+    }
+
+    /**
+      * Constructs a copy of the given Frame.
+      *
+      * @param frame a frame.
+      */
+    public Frame(final Frame<? extends V> frame) {
+        this(frame.numLocals, frame.values.length - frame.numLocals);
+        init(frame); // NOPMD(ConstructorCallsOverridableMethod): can't fix for backward compatibility.
+    }
+
+    /**
+      * Copies the state of the given frame into this frame.
+      *
+      * @param frame a frame.
+      * @return this frame.
+      */
+    public Frame<V> init(final Frame<? extends V> frame) {
+        returnValue = frame.returnValue;
+        if (values.length < frame.values.length) {
+            values = frame.values.clone();
+        } else {
+            System.arraycopy(frame.values, 0, values, 0, frame.values.length);
+        }
+        numLocals = frame.numLocals;
+        numStack = frame.numStack;
+        maxStack = frame.maxStack;
+        return this;
+    }
+
+    /**
+      * Initializes a frame corresponding to the target or to the successor of a jump instruction. This
+      * method is called by {@link Analyzer#analyze(String, jdk.internal.org.objectweb.asm.tree.MethodNode)} while
+      * interpreting jump instructions. It is called once for each possible target of the jump
+      * instruction, and once for its successor instruction (except for GOTO and JSR), before the frame
+      * is merged with the existing frame at this location. The default implementation of this method
+      * does nothing.
+      *
+      * <p>Overriding this method and changing the frame values allows implementing branch-sensitive
+      * analyses.
+      *
+      * @param opcode the opcode of the jump instruction. Can be IFEQ, IFNE, IFLT, IFGE, IFGT, IFLE,
+      *     IF_ICMPEQ, IF_ICMPNE, IF_ICMPLT, IF_ICMPGE, IF_ICMPGT, IF_ICMPLE, IF_ACMPEQ, IF_ACMPNE,
+      *     GOTO, JSR, IFNULL, IFNONNULL, TABLESWITCH or LOOKUPSWITCH.
+      * @param target a target of the jump instruction this frame corresponds to, or {@literal null} if
+      *     this frame corresponds to the successor of the jump instruction (i.e. the next instruction
+      *     in the instructions sequence).
+      */
+    public void initJumpTarget(final int opcode, final LabelNode target) {
+        // Does nothing by default.
+    }
+
+    /**
+      * Sets the expected return type of the analyzed method.
+      *
+      * @param v the expected return type of the analyzed method, or {@literal null} if the method
+      *     returns void.
+      */
+    public void setReturn(final V v) {
+        returnValue = v;
+    }
+
+    /**
+      * Returns the maximum number of local variables of this frame. Long and double values are
+      * represented with two variables.
+      *
+      * @return the maximum number of local variables of this frame.
+      */
+    public int getLocals() {
+        return numLocals;
+    }
+
+    /**
+      * Returns the maximum number of elements in the operand stack of this frame. Long and double
+      * values are represented with a single element.
+      *
+      * @return the maximum number of elements in the operand stack of this frame.
+      */
+    public int getMaxStackSize() {
+        return maxStack;
+    }
+
+    /**
+      * Returns the value of the given local variable. Long and double values are represented with two
+      * variables.
+      *
+      * @param index a local variable index.
+      * @return the value of the given local variable.
+      * @throws IndexOutOfBoundsException if the variable does not exist.
+      */
+    public V getLocal(final int index) {
+        if (index >= numLocals) {
+            throw new IndexOutOfBoundsException("Trying to get an inexistant local variable " + index);
+        }
+        return values[index];
+    }
+
+    /**
+      * Sets the value of the given local variable. Long and double values are represented with two
+      * variables.
+      *
+      * @param index a local variable index.
+      * @param value the new value of this local variable.
+      * @throws IndexOutOfBoundsException if the variable does not exist.
+      */
+    public void setLocal(final int index, final V value) {
+        if (index >= numLocals) {
+            throw new IndexOutOfBoundsException("Trying to set an inexistant local variable " + index);
+        }
+        values[index] = value;
+    }
+
+    /**
+      * Returns the number of elements in the operand stack of this frame. Long and double values are
+      * represented with a single element.
+      *
+      * @return the number of elements in the operand stack of this frame.
+      */
+    public int getStackSize() {
+        return numStack;
+    }
+
+    /**
+      * Returns the value of the given operand stack slot.
+      *
+      * @param index the index of an operand stack slot.
+      * @return the value of the given operand stack slot.
+      * @throws IndexOutOfBoundsException if the operand stack slot does not exist.
+      */
+    public V getStack(final int index) {
+        return values[numLocals + index];
+    }
+
+    /**
+      * Sets the value of the given stack slot.
+      *
+      * @param index the index of an operand stack slot.
+      * @param value the new value of the stack slot.
+      * @throws IndexOutOfBoundsException if the stack slot does not exist.
+      */
+    public void setStack(final int index, final V value) {
+        values[numLocals + index] = value;
+    }
+
+    /** Clears the operand stack of this frame. */
+    public void clearStack() {
+        numStack = 0;
+    }
+
+    /**
+      * Pops a value from the operand stack of this frame.
+      *
+      * @return the value that has been popped from the stack.
+      * @throws IndexOutOfBoundsException if the operand stack is empty.
+      */
+    public V pop() {
+        if (numStack == 0) {
+            throw new IndexOutOfBoundsException("Cannot pop operand off an empty stack.");
+        }
+        return values[numLocals + (--numStack)];
+    }
+
+    /**
+      * Pushes a value into the operand stack of this frame.
+      *
+      * @param value the value that must be pushed into the stack.
+      * @throws IndexOutOfBoundsException if the operand stack is full.
+      */
+    @SuppressWarnings("unchecked")
+    public void push(final V value) {
+        if (numLocals + numStack >= values.length) {
+            if (numLocals + numStack >= maxStack) {
+                throw new IndexOutOfBoundsException("Insufficient maximum stack size.");
+            }
+            V[] oldValues = values;
+            values = (V[]) new Value[2 * values.length];
+            System.arraycopy(oldValues, 0, values, 0, oldValues.length);
+        }
+        values[numLocals + (numStack++)] = value;
+    }
+
+    /**
+      * Simulates the execution of the given instruction on this execution stack frame.
+      *
+      * @param insn the instruction to execute.
+      * @param interpreter the interpreter to use to compute values from other values.
+      * @throws AnalyzerException if the instruction cannot be executed on this execution frame (e.g. a
+      *     POP on an empty operand stack).
+      */
+    public void execute(final AbstractInsnNode insn, final Interpreter<V> interpreter)
+            throws AnalyzerException {
+        V value1;
+        V value2;
+        V value3;
+        V value4;
+        int varIndex;
+
+        switch (insn.getOpcode()) {
+            case Opcodes.NOP:
+                break;
+            case Opcodes.ACONST_NULL:
+            case Opcodes.ICONST_M1:
+            case Opcodes.ICONST_0:
+            case Opcodes.ICONST_1:
+            case Opcodes.ICONST_2:
+            case Opcodes.ICONST_3:
+            case Opcodes.ICONST_4:
+            case Opcodes.ICONST_5:
+            case Opcodes.LCONST_0:
+            case Opcodes.LCONST_1:
+            case Opcodes.FCONST_0:
+            case Opcodes.FCONST_1:
+            case Opcodes.FCONST_2:
+            case Opcodes.DCONST_0:
+            case Opcodes.DCONST_1:
+            case Opcodes.BIPUSH:
+            case Opcodes.SIPUSH:
+            case Opcodes.LDC:
+                push(interpreter.newOperation(insn));
+                break;
+            case Opcodes.ILOAD:
+            case Opcodes.LLOAD:
+            case Opcodes.FLOAD:
+            case Opcodes.DLOAD:
+            case Opcodes.ALOAD:
+                push(interpreter.copyOperation(insn, getLocal(((VarInsnNode) insn).var)));
+                break;
+            case Opcodes.ISTORE:
+            case Opcodes.LSTORE:
+            case Opcodes.FSTORE:
+            case Opcodes.DSTORE:
+            case Opcodes.ASTORE:
+                value1 = interpreter.copyOperation(insn, pop());
+                varIndex = ((VarInsnNode) insn).var;
+                setLocal(varIndex, value1);
+                if (value1.getSize() == 2) {
+                    setLocal(varIndex + 1, interpreter.newEmptyValue(varIndex + 1));
+                }
+                if (varIndex > 0) {
+                    Value local = getLocal(varIndex - 1);
+                    if (local != null && local.getSize() == 2) {
+                        setLocal(varIndex - 1, interpreter.newEmptyValue(varIndex - 1));
+                    }
+                }
+                break;
+            case Opcodes.IASTORE:
+            case Opcodes.LASTORE:
+            case Opcodes.FASTORE:
+            case Opcodes.DASTORE:
+            case Opcodes.AASTORE:
+            case Opcodes.BASTORE:
+            case Opcodes.CASTORE:
+            case Opcodes.SASTORE:
+                value3 = pop();
+                value2 = pop();
+                value1 = pop();
+                interpreter.ternaryOperation(insn, value1, value2, value3);
+                break;
+            case Opcodes.POP:
+                if (pop().getSize() == 2) {
+                    throw new AnalyzerException(insn, "Illegal use of POP");
+                }
+                break;
+            case Opcodes.POP2:
+                if (pop().getSize() == 1 && pop().getSize() != 1) {
+                    throw new AnalyzerException(insn, "Illegal use of POP2");
+                }
+                break;
+            case Opcodes.DUP:
+                value1 = pop();
+                if (value1.getSize() != 1) {
+                    throw new AnalyzerException(insn, "Illegal use of DUP");
+                }
+                push(value1);
+                push(interpreter.copyOperation(insn, value1));
+                break;
+            case Opcodes.DUP_X1:
+                value1 = pop();
+                value2 = pop();
+                if (value1.getSize() != 1 || value2.getSize() != 1) {
+                    throw new AnalyzerException(insn, "Illegal use of DUP_X1");
+                }
+                push(interpreter.copyOperation(insn, value1));
+                push(value2);
+                push(value1);
+                break;
+            case Opcodes.DUP_X2:
+                value1 = pop();
+                if (value1.getSize() == 1 && executeDupX2(insn, value1, interpreter)) {
+                    break;
+                }
+                throw new AnalyzerException(insn, "Illegal use of DUP_X2");
+            case Opcodes.DUP2:
+                value1 = pop();
+                if (value1.getSize() == 1) {
+                    value2 = pop();
+                    if (value2.getSize() == 1) {
+                        push(value2);
+                        push(value1);
+                        push(interpreter.copyOperation(insn, value2));
+                        push(interpreter.copyOperation(insn, value1));
+                        break;
+                    }
+                } else {
+                    push(value1);
+                    push(interpreter.copyOperation(insn, value1));
+                    break;
+                }
+                throw new AnalyzerException(insn, "Illegal use of DUP2");
+            case Opcodes.DUP2_X1:
+                value1 = pop();
+                if (value1.getSize() == 1) {
+                    value2 = pop();
+                    if (value2.getSize() == 1) {
+                        value3 = pop();
+                        if (value3.getSize() == 1) {
+                            push(interpreter.copyOperation(insn, value2));
+                            push(interpreter.copyOperation(insn, value1));
+                            push(value3);
+                            push(value2);
+                            push(value1);
+                            break;
+                        }
+                    }
+                } else {
+                    value2 = pop();
+                    if (value2.getSize() == 1) {
+                        push(interpreter.copyOperation(insn, value1));
+                        push(value2);
+                        push(value1);
+                        break;
+                    }
+                }
+                throw new AnalyzerException(insn, "Illegal use of DUP2_X1");
+            case Opcodes.DUP2_X2:
+                value1 = pop();
+                if (value1.getSize() == 1) {
+                    value2 = pop();
+                    if (value2.getSize() == 1) {
+                        value3 = pop();
+                        if (value3.getSize() == 1) {
+                            value4 = pop();
+                            if (value4.getSize() == 1) {
+                                push(interpreter.copyOperation(insn, value2));
+                                push(interpreter.copyOperation(insn, value1));
+                                push(value4);
+                                push(value3);
+                                push(value2);
+                                push(value1);
+                                break;
+                            }
+                        } else {
+                            push(interpreter.copyOperation(insn, value2));
+                            push(interpreter.copyOperation(insn, value1));
+                            push(value3);
+                            push(value2);
+                            push(value1);
+                            break;
+                        }
+                    }
+                } else if (executeDupX2(insn, value1, interpreter)) {
+                    break;
+                }
+                throw new AnalyzerException(insn, "Illegal use of DUP2_X2");
+            case Opcodes.SWAP:
+                value2 = pop();
+                value1 = pop();
+                if (value1.getSize() != 1 || value2.getSize() != 1) {
+                    throw new AnalyzerException(insn, "Illegal use of SWAP");
+                }
+                push(interpreter.copyOperation(insn, value2));
+                push(interpreter.copyOperation(insn, value1));
+                break;
+            case Opcodes.IALOAD:
+            case Opcodes.LALOAD:
+            case Opcodes.FALOAD:
+            case Opcodes.DALOAD:
+            case Opcodes.AALOAD:
+            case Opcodes.BALOAD:
+            case Opcodes.CALOAD:
+            case Opcodes.SALOAD:
+            case Opcodes.IADD:
+            case Opcodes.LADD:
+            case Opcodes.FADD:
+            case Opcodes.DADD:
+            case Opcodes.ISUB:
+            case Opcodes.LSUB:
+            case Opcodes.FSUB:
+            case Opcodes.DSUB:
+            case Opcodes.IMUL:
+            case Opcodes.LMUL:
+            case Opcodes.FMUL:
+            case Opcodes.DMUL:
+            case Opcodes.IDIV:
+            case Opcodes.LDIV:
+            case Opcodes.FDIV:
+            case Opcodes.DDIV:
+            case Opcodes.IREM:
+            case Opcodes.LREM:
+            case Opcodes.FREM:
+            case Opcodes.DREM:
+            case Opcodes.ISHL:
+            case Opcodes.LSHL:
+            case Opcodes.ISHR:
+            case Opcodes.LSHR:
+            case Opcodes.IUSHR:
+            case Opcodes.LUSHR:
+            case Opcodes.IAND:
+            case Opcodes.LAND:
+            case Opcodes.IOR:
+            case Opcodes.LOR:
+            case Opcodes.IXOR:
+            case Opcodes.LXOR:
+            case Opcodes.LCMP:
+            case Opcodes.FCMPL:
+            case Opcodes.FCMPG:
+            case Opcodes.DCMPL:
+            case Opcodes.DCMPG:
+                value2 = pop();
+                value1 = pop();
+                push(interpreter.binaryOperation(insn, value1, value2));
+                break;
+            case Opcodes.INEG:
+            case Opcodes.LNEG:
+            case Opcodes.FNEG:
+            case Opcodes.DNEG:
+                push(interpreter.unaryOperation(insn, pop()));
+                break;
+            case Opcodes.IINC:
+                varIndex = ((IincInsnNode) insn).var;
+                setLocal(varIndex, interpreter.unaryOperation(insn, getLocal(varIndex)));
+                break;
+            case Opcodes.I2L:
+            case Opcodes.I2F:
+            case Opcodes.I2D:
+            case Opcodes.L2I:
+            case Opcodes.L2F:
+            case Opcodes.L2D:
+            case Opcodes.F2I:
+            case Opcodes.F2L:
+            case Opcodes.F2D:
+            case Opcodes.D2I:
+            case Opcodes.D2L:
+            case Opcodes.D2F:
+            case Opcodes.I2B:
+            case Opcodes.I2C:
+            case Opcodes.I2S:
+                push(interpreter.unaryOperation(insn, pop()));
+                break;
+            case Opcodes.IFEQ:
+            case Opcodes.IFNE:
+            case Opcodes.IFLT:
+            case Opcodes.IFGE:
+            case Opcodes.IFGT:
+            case Opcodes.IFLE:
+                interpreter.unaryOperation(insn, pop());
+                break;
+            case Opcodes.IF_ICMPEQ:
+            case Opcodes.IF_ICMPNE:
+            case Opcodes.IF_ICMPLT:
+            case Opcodes.IF_ICMPGE:
+            case Opcodes.IF_ICMPGT:
+            case Opcodes.IF_ICMPLE:
+            case Opcodes.IF_ACMPEQ:
+            case Opcodes.IF_ACMPNE:
+            case Opcodes.PUTFIELD:
+                value2 = pop();
+                value1 = pop();
+                interpreter.binaryOperation(insn, value1, value2);
+                break;
+            case Opcodes.GOTO:
+                break;
+            case Opcodes.JSR:
+                push(interpreter.newOperation(insn));
+                break;
+            case Opcodes.RET:
+                break;
+            case Opcodes.TABLESWITCH:
+            case Opcodes.LOOKUPSWITCH:
+                interpreter.unaryOperation(insn, pop());
+                break;
+            case Opcodes.IRETURN:
+            case Opcodes.LRETURN:
+            case Opcodes.FRETURN:
+            case Opcodes.DRETURN:
+            case Opcodes.ARETURN:
+                value1 = pop();
+                interpreter.unaryOperation(insn, value1);
+                interpreter.returnOperation(insn, value1, returnValue);
+                break;
+            case Opcodes.RETURN:
+                if (returnValue != null) {
+                    throw new AnalyzerException(insn, "Incompatible return type");
+                }
+                break;
+            case Opcodes.GETSTATIC:
+                push(interpreter.newOperation(insn));
+                break;
+            case Opcodes.PUTSTATIC:
+                interpreter.unaryOperation(insn, pop());
+                break;
+            case Opcodes.GETFIELD:
+                push(interpreter.unaryOperation(insn, pop()));
+                break;
+            case Opcodes.INVOKEVIRTUAL:
+            case Opcodes.INVOKESPECIAL:
+            case Opcodes.INVOKESTATIC:
+            case Opcodes.INVOKEINTERFACE:
+                executeInvokeInsn(insn, ((MethodInsnNode) insn).desc, interpreter);
+                break;
+            case Opcodes.INVOKEDYNAMIC:
+                executeInvokeInsn(insn, ((InvokeDynamicInsnNode) insn).desc, interpreter);
+                break;
+            case Opcodes.NEW:
+                push(interpreter.newOperation(insn));
+                break;
+            case Opcodes.NEWARRAY:
+            case Opcodes.ANEWARRAY:
+            case Opcodes.ARRAYLENGTH:
+                push(interpreter.unaryOperation(insn, pop()));
+                break;
+            case Opcodes.ATHROW:
+                interpreter.unaryOperation(insn, pop());
+                break;
+            case Opcodes.CHECKCAST:
+            case Opcodes.INSTANCEOF:
+                push(interpreter.unaryOperation(insn, pop()));
+                break;
+            case Opcodes.MONITORENTER:
+            case Opcodes.MONITOREXIT:
+                interpreter.unaryOperation(insn, pop());
+                break;
+            case Opcodes.MULTIANEWARRAY:
+                List<V> valueList = new ArrayList<>();
+                for (int i = ((MultiANewArrayInsnNode) insn).dims; i > 0; --i) {
+                    valueList.add(0, pop());
+                }
+                push(interpreter.naryOperation(insn, valueList));
+                break;
+            case Opcodes.IFNULL:
+            case Opcodes.IFNONNULL:
+                interpreter.unaryOperation(insn, pop());
+                break;
+            default:
+                throw new AnalyzerException(insn, "Illegal opcode " + insn.getOpcode());
+        }
+    }
+
+    private boolean executeDupX2(
+            final AbstractInsnNode insn, final V value1, final Interpreter<V> interpreter)
+            throws AnalyzerException {
+        V value2 = pop();
+        if (value2.getSize() == 1) {
+            V value3 = pop();
+            if (value3.getSize() == 1) {
+                push(interpreter.copyOperation(insn, value1));
+                push(value3);
+                push(value2);
+                push(value1);
+                return true;
+            }
+        } else {
+            push(interpreter.copyOperation(insn, value1));
+            push(value2);
+            push(value1);
+            return true;
+        }
+        return false;
+    }
+
+    private void executeInvokeInsn(
+            final AbstractInsnNode insn, final String methodDescriptor, final Interpreter<V> interpreter)
+            throws AnalyzerException {
+        ArrayList<V> valueList = new ArrayList<>();
+        for (int i = Type.getArgumentCount(methodDescriptor); i > 0; --i) {
+            valueList.add(0, pop());
+        }
+        if (insn.getOpcode() != Opcodes.INVOKESTATIC && insn.getOpcode() != Opcodes.INVOKEDYNAMIC) {
+            valueList.add(0, pop());
+        }
+        if (Type.getReturnType(methodDescriptor) == Type.VOID_TYPE) {
+            interpreter.naryOperation(insn, valueList);
+        } else {
+            push(interpreter.naryOperation(insn, valueList));
+        }
+    }
+
+    /**
+      * Merges the given frame into this frame.
+      *
+      * @param frame a frame. This frame is left unchanged by this method.
+      * @param interpreter the interpreter used to merge values.
+      * @return {@literal true} if this frame has been changed as a result of the merge operation, or
+      *     {@literal false} otherwise.
+      * @throws AnalyzerException if the frames have incompatible sizes.
+      */
+    public boolean merge(final Frame<? extends V> frame, final Interpreter<V> interpreter)
+            throws AnalyzerException {
+        if (numStack != frame.numStack) {
+            throw new AnalyzerException(null, "Incompatible stack heights");
+        }
+        boolean changed = false;
+        for (int i = 0; i < numLocals + numStack; ++i) {
+            V v = interpreter.merge(values[i], frame.values[i]);
+            if (!v.equals(values[i])) {
+                values[i] = v;
+                changed = true;
+            }
+        }
+        return changed;
+    }
+
+    /**
+      * Merges the given frame into this frame (case of a subroutine). The operand stacks are not
+      * merged, and only the local variables that have not been used by the subroutine are merged.
+      *
+      * @param frame a frame. This frame is left unchanged by this method.
+      * @param localsUsed the local variables that are read or written by the subroutine. The i-th
+      *     element is true if and only if the local variable at index i is read or written by the
+      *     subroutine.
+      * @return {@literal true} if this frame has been changed as a result of the merge operation, or
+      *     {@literal false} otherwise.
+      */
+    public boolean merge(final Frame<? extends V> frame, final boolean[] localsUsed) {
+        boolean changed = false;
+        for (int i = 0; i < numLocals; ++i) {
+            if (!localsUsed[i] && !values[i].equals(frame.values[i])) {
+                values[i] = frame.values[i];
+                changed = true;
+            }
+        }
+        return changed;
+    }
+
+    /**
+      * Returns a string representation of this frame.
+      *
+      * @return a string representation of this frame.
+      */
+    @Override
+    public String toString() {
+        StringBuilder stringBuilder = new StringBuilder();
+        for (int i = 0; i < getLocals(); ++i) {
+            stringBuilder.append(getLocal(i));
+        }
+        stringBuilder.append(' ');
+        for (int i = 0; i < getStackSize(); ++i) {
+            stringBuilder.append(getStack(i).toString());
+        }
+        return stringBuilder.toString();
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/org/objectweb/asm/tree/analysis/Interpreter.class b/tests/test_data/std/jdk/internal/org/objectweb/asm/tree/analysis/Interpreter.class
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diff --git a/tests/test_data/std/jdk/internal/org/objectweb/asm/tree/analysis/Interpreter.java b/tests/test_data/std/jdk/internal/org/objectweb/asm/tree/analysis/Interpreter.java
new file mode 100644
index 00000000..d2c6103b
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/org/objectweb/asm/tree/analysis/Interpreter.java
@@ -0,0 +1,299 @@
+/*
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/*
+ * This file is available under and governed by the GNU General Public
+ * License version 2 only, as published by the Free Software Foundation.
+ * However, the following notice accompanied the original version of this
+ * file:
+ *
+ * ASM: a very small and fast Java bytecode manipulation framework
+ * Copyright (c) 2000-2011 INRIA, France Telecom
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the copyright holders nor the names of its
+ *    contributors may be used to endorse or promote products derived from
+ *    this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+package jdk.internal.org.objectweb.asm.tree.analysis;
+
+import java.util.List;
+import jdk.internal.org.objectweb.asm.Opcodes;
+import jdk.internal.org.objectweb.asm.Type;
+import jdk.internal.org.objectweb.asm.tree.AbstractInsnNode;
+import jdk.internal.org.objectweb.asm.tree.TryCatchBlockNode;
+
+/**
+ * A semantic bytecode interpreter. More precisely, this interpreter only manages the computation of
+ * values from other values: it does not manage the transfer of values to or from the stack, and to
+ * or from the local variables. This separation allows a generic bytecode {@link Analyzer} to work
+ * with various semantic interpreters, without needing to duplicate the code to simulate the
+ * transfer of values.
+ *
+ * @param <V> type of the Value used for the analysis.
+ * @author Eric Bruneton
+ */
+public abstract class Interpreter<V extends Value> {
+
+    /**
+      * The ASM API version supported by this interpreter. The value of this field must be one of the
+      * {@code ASM}<i>x</i> values in {@link Opcodes}.
+      */
+    protected final int api;
+
+    /**
+      * Constructs a new {@link Interpreter}.
+      *
+      * @param api the ASM API version supported by this interpreter. Must be one of the {@code
+      *     ASM}<i>x</i> values in {@link Opcodes}.
+      */
+    protected Interpreter(final int api) {
+        this.api = api;
+    }
+
+    /**
+      * Creates a new value that represents the given type.
+      *
+      * <p>Called for method parameters (including <code>this</code>), exception handler variable and
+      * with <code>null</code> type for variables reserved by long and double types.
+      *
+      * <p>An interpreter may choose to implement one or more of {@link
+      * Interpreter#newReturnTypeValue(Type)}, {@link Interpreter#newParameterValue(boolean, int,
+      * Type)}, {@link Interpreter#newEmptyValue(int)}, {@link
+      * Interpreter#newExceptionValue(TryCatchBlockNode, Frame, Type)} to distinguish different types
+      * of new value.
+      *
+      * @param type a primitive or reference type, or {@literal null} to represent an uninitialized
+      *     value.
+      * @return a value that represents the given type. The size of the returned value must be equal to
+      *     the size of the given type.
+      */
+    public abstract V newValue(Type type);
+
+    /**
+      * Creates a new value that represents the given parameter type. This method is called to
+      * initialize the value of a local corresponding to a method parameter in a frame.
+      *
+      * <p>By default, calls <code>newValue(type)</code>.
+      *
+      * @param isInstanceMethod {@literal true} if the method is non-static.
+      * @param local the local variable index.
+      * @param type a primitive or reference type.
+      * @return a value that represents the given type. The size of the returned value must be equal to
+      *     the size of the given type.
+      */
+    public V newParameterValue(final boolean isInstanceMethod, final int local, final Type type) {
+        return newValue(type);
+    }
+
+    /**
+      * Creates a new value that represents the given return type. This method is called to initialize
+      * the return type value of a frame.
+      *
+      * <p>By default, calls <code>newValue(type)</code>.
+      *
+      * @param type a primitive or reference type.
+      * @return a value that represents the given type. The size of the returned value must be equal to
+      *     the size of the given type.
+      */
+    public V newReturnTypeValue(final Type type) {
+        return newValue(type);
+    }
+
+    /**
+      * Creates a new uninitialized value for a local variable. This method is called to initialize the
+      * value of a local that does not correspond to a method parameter, and to reset one half of a
+      * size-2 value when the other half is assigned a size-1 value.
+      *
+      * <p>By default, calls <code>newValue(null)</code>.
+      *
+      * @param local the local variable index.
+      * @return a value representing an uninitialized value. The size of the returned value must be
+      *     equal to 1.
+      */
+    public V newEmptyValue(final int local) {
+        return newValue(null);
+    }
+
+    /**
+      * Creates a new value that represents the given exception type. This method is called to
+      * initialize the exception value on the call stack at the entry of an exception handler.
+      *
+      * <p>By default, calls <code>newValue(exceptionType)</code>.
+      *
+      * @param tryCatchBlockNode the exception handler.
+      * @param handlerFrame the exception handler frame.
+      * @param exceptionType the exception type handled by this handler.
+      * @return a value that represents the given {@code exceptionType}. The size of the returned value
+      *     must be equal to 1.
+      */
+    public V newExceptionValue(
+            final TryCatchBlockNode tryCatchBlockNode,
+            final Frame<V> handlerFrame,
+            final Type exceptionType) {
+        return newValue(exceptionType);
+    }
+
+    /**
+      * Interprets a bytecode instruction without arguments. This method is called for the following
+      * opcodes:
+      *
+      * <p>ACONST_NULL, ICONST_M1, ICONST_0, ICONST_1, ICONST_2, ICONST_3, ICONST_4, ICONST_5,
+      * LCONST_0, LCONST_1, FCONST_0, FCONST_1, FCONST_2, DCONST_0, DCONST_1, BIPUSH, SIPUSH, LDC, JSR,
+      * GETSTATIC, NEW
+      *
+      * @param insn the bytecode instruction to be interpreted.
+      * @return the result of the interpretation of the given instruction.
+      * @throws AnalyzerException if an error occurred during the interpretation.
+      */
+    public abstract V newOperation(AbstractInsnNode insn) throws AnalyzerException;
+
+    /**
+      * Interprets a bytecode instruction that moves a value on the stack or to or from local
+      * variables. This method is called for the following opcodes:
+      *
+      * <p>ILOAD, LLOAD, FLOAD, DLOAD, ALOAD, ISTORE, LSTORE, FSTORE, DSTORE, ASTORE, DUP, DUP_X1,
+      * DUP_X2, DUP2, DUP2_X1, DUP2_X2, SWAP
+      *
+      * @param insn the bytecode instruction to be interpreted.
+      * @param value the value that must be moved by the instruction.
+      * @return the result of the interpretation of the given instruction. The returned value must be
+      *     {@code equal} to the given value.
+      * @throws AnalyzerException if an error occurred during the interpretation.
+      */
+    public abstract V copyOperation(AbstractInsnNode insn, V value) throws AnalyzerException;
+
+    /**
+      * Interprets a bytecode instruction with a single argument. This method is called for the
+      * following opcodes:
+      *
+      * <p>INEG, LNEG, FNEG, DNEG, IINC, I2L, I2F, I2D, L2I, L2F, L2D, F2I, F2L, F2D, D2I, D2L, D2F,
+      * I2B, I2C, I2S, IFEQ, IFNE, IFLT, IFGE, IFGT, IFLE, TABLESWITCH, LOOKUPSWITCH, IRETURN, LRETURN,
+      * FRETURN, DRETURN, ARETURN, PUTSTATIC, GETFIELD, NEWARRAY, ANEWARRAY, ARRAYLENGTH, ATHROW,
+      * CHECKCAST, INSTANCEOF, MONITORENTER, MONITOREXIT, IFNULL, IFNONNULL
+      *
+      * @param insn the bytecode instruction to be interpreted.
+      * @param value the argument of the instruction to be interpreted.
+      * @return the result of the interpretation of the given instruction.
+      * @throws AnalyzerException if an error occurred during the interpretation.
+      */
+    public abstract V unaryOperation(AbstractInsnNode insn, V value) throws AnalyzerException;
+
+    /**
+      * Interprets a bytecode instruction with two arguments. This method is called for the following
+      * opcodes:
+      *
+      * <p>IALOAD, LALOAD, FALOAD, DALOAD, AALOAD, BALOAD, CALOAD, SALOAD, IADD, LADD, FADD, DADD,
+      * ISUB, LSUB, FSUB, DSUB, IMUL, LMUL, FMUL, DMUL, IDIV, LDIV, FDIV, DDIV, IREM, LREM, FREM, DREM,
+      * ISHL, LSHL, ISHR, LSHR, IUSHR, LUSHR, IAND, LAND, IOR, LOR, IXOR, LXOR, LCMP, FCMPL, FCMPG,
+      * DCMPL, DCMPG, IF_ICMPEQ, IF_ICMPNE, IF_ICMPLT, IF_ICMPGE, IF_ICMPGT, IF_ICMPLE, IF_ACMPEQ,
+      * IF_ACMPNE, PUTFIELD
+      *
+      * @param insn the bytecode instruction to be interpreted.
+      * @param value1 the first argument of the instruction to be interpreted.
+      * @param value2 the second argument of the instruction to be interpreted.
+      * @return the result of the interpretation of the given instruction.
+      * @throws AnalyzerException if an error occurred during the interpretation.
+      */
+    public abstract V binaryOperation(AbstractInsnNode insn, V value1, V value2)
+            throws AnalyzerException;
+
+    /**
+      * Interprets a bytecode instruction with three arguments. This method is called for the following
+      * opcodes:
+      *
+      * <p>IASTORE, LASTORE, FASTORE, DASTORE, AASTORE, BASTORE, CASTORE, SASTORE
+      *
+      * @param insn the bytecode instruction to be interpreted.
+      * @param value1 the first argument of the instruction to be interpreted.
+      * @param value2 the second argument of the instruction to be interpreted.
+      * @param value3 the third argument of the instruction to be interpreted.
+      * @return the result of the interpretation of the given instruction.
+      * @throws AnalyzerException if an error occurred during the interpretation.
+      */
+    public abstract V ternaryOperation(AbstractInsnNode insn, V value1, V value2, V value3)
+            throws AnalyzerException;
+
+    /**
+      * Interprets a bytecode instruction with a variable number of arguments. This method is called
+      * for the following opcodes:
+      *
+      * <p>INVOKEVIRTUAL, INVOKESPECIAL, INVOKESTATIC, INVOKEINTERFACE, MULTIANEWARRAY and
+      * INVOKEDYNAMIC
+      *
+      * @param insn the bytecode instruction to be interpreted.
+      * @param values the arguments of the instruction to be interpreted.
+      * @return the result of the interpretation of the given instruction.
+      * @throws AnalyzerException if an error occurred during the interpretation.
+      */
+    public abstract V naryOperation(AbstractInsnNode insn, List<? extends V> values)
+            throws AnalyzerException;
+
+    /**
+      * Interprets a bytecode return instruction. This method is called for the following opcodes:
+      *
+      * <p>IRETURN, LRETURN, FRETURN, DRETURN, ARETURN
+      *
+      * @param insn the bytecode instruction to be interpreted.
+      * @param value the argument of the instruction to be interpreted.
+      * @param expected the expected return type of the analyzed method.
+      * @throws AnalyzerException if an error occurred during the interpretation.
+      */
+    public abstract void returnOperation(AbstractInsnNode insn, V value, V expected)
+            throws AnalyzerException;
+
+    /**
+      * Merges two values. The merge operation must return a value that represents both values (for
+      * instance, if the two values are two types, the merged value must be a common super type of the
+      * two types. If the two values are integer intervals, the merged value must be an interval that
+      * contains the previous ones. Likewise for other types of values).
+      *
+      * @param value1 a value.
+      * @param value2 another value.
+      * @return the merged value. If the merged value is equal to {@code value1}, this method
+      *     <i>must</i> return {@code value1}.
+      */
+    public abstract V merge(V value1, V value2);
+}
diff --git a/tests/test_data/std/jdk/internal/org/objectweb/asm/tree/analysis/SimpleVerifier.class b/tests/test_data/std/jdk/internal/org/objectweb/asm/tree/analysis/SimpleVerifier.class
new file mode 100644
index 0000000000000000000000000000000000000000..5803a7a5a54bfced32d783ff3e7f2209c4c53b52
GIT binary patch
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diff --git a/tests/test_data/std/jdk/internal/org/objectweb/asm/tree/analysis/SimpleVerifier.java b/tests/test_data/std/jdk/internal/org/objectweb/asm/tree/analysis/SimpleVerifier.java
new file mode 100644
index 00000000..6f2f124a
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/org/objectweb/asm/tree/analysis/SimpleVerifier.java
@@ -0,0 +1,413 @@
+/*
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/*
+ * This file is available under and governed by the GNU General Public
+ * License version 2 only, as published by the Free Software Foundation.
+ * However, the following notice accompanied the original version of this
+ * file:
+ *
+ * ASM: a very small and fast Java bytecode manipulation framework
+ * Copyright (c) 2000-2011 INRIA, France Telecom
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the copyright holders nor the names of its
+ *    contributors may be used to endorse or promote products derived from
+ *    this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+package jdk.internal.org.objectweb.asm.tree.analysis;
+
+import java.util.List;
+import jdk.internal.org.objectweb.asm.Opcodes;
+import jdk.internal.org.objectweb.asm.Type;
+
+/**
+ * An extended {@link BasicVerifier} that performs more precise verifications. This verifier
+ * computes exact class types, instead of using a single "object reference" type (as done in {@link
+ * BasicVerifier}).
+ *
+ * @author Eric Bruneton
+ * @author Bing Ran
+ */
+public class SimpleVerifier extends BasicVerifier {
+
+    /** The type of the class that is verified. */
+    private final Type currentClass;
+
+    /** The type of the super class of the class that is verified. */
+    private final Type currentSuperClass;
+
+    /** The types of the interfaces directly implemented by the class that is verified. */
+    private final List<Type> currentClassInterfaces;
+
+    /** Whether the class that is verified is an interface. */
+    private final boolean isInterface;
+
+    /** The loader to use to load the referenced classes. */
+    private ClassLoader loader = getClass().getClassLoader();
+
+    /**
+      * Constructs a new {@link SimpleVerifier}. <i>Subclasses must not use this constructor</i>.
+      * Instead, they must use the {@link #SimpleVerifier(int, Type, Type, List, boolean)} version.
+      */
+    public SimpleVerifier() {
+        this(null, null, false);
+    }
+
+    /**
+      * Constructs a new {@link SimpleVerifier} to verify a specific class. This class will not be
+      * loaded into the JVM since it may be incorrect. <i>Subclasses must not use this constructor</i>.
+      * Instead, they must use the {@link #SimpleVerifier(int, Type, Type, List, boolean)} version.
+      *
+      * @param currentClass the type of the class to be verified.
+      * @param currentSuperClass the type of the super class of the class to be verified.
+      * @param isInterface whether the class to be verifier is an interface.
+      */
+    public SimpleVerifier(
+            final Type currentClass, final Type currentSuperClass, final boolean isInterface) {
+        this(currentClass, currentSuperClass, null, isInterface);
+    }
+
+    /**
+      * Constructs a new {@link SimpleVerifier} to verify a specific class. This class will not be
+      * loaded into the JVM since it may be incorrect. <i>Subclasses must not use this constructor</i>.
+      * Instead, they must use the {@link #SimpleVerifier(int, Type, Type, List, boolean)} version.
+      *
+      * @param currentClass the type of the class to be verified.
+      * @param currentSuperClass the type of the super class of the class to be verified.
+      * @param currentClassInterfaces the types of the interfaces directly implemented by the class to
+      *     be verified.
+      * @param isInterface whether the class to be verifier is an interface.
+      */
+    public SimpleVerifier(
+            final Type currentClass,
+            final Type currentSuperClass,
+            final List<Type> currentClassInterfaces,
+            final boolean isInterface) {
+        this(
+                /* latest api = */ ASM9,
+                currentClass,
+                currentSuperClass,
+                currentClassInterfaces,
+                isInterface);
+        if (getClass() != SimpleVerifier.class) {
+            throw new IllegalStateException();
+        }
+    }
+
+    /**
+      * Constructs a new {@link SimpleVerifier} to verify a specific class. This class will not be
+      * loaded into the JVM since it may be incorrect.
+      *
+      * @param api the ASM API version supported by this verifier. Must be one of the {@code
+      *     ASM}<i>x</i> values in {@link Opcodes}.
+      * @param currentClass the type of the class to be verified.
+      * @param currentSuperClass the type of the super class of the class to be verified.
+      * @param currentClassInterfaces the types of the interfaces directly implemented by the class to
+      *     be verified.
+      * @param isInterface whether the class to be verifier is an interface.
+      */
+    protected SimpleVerifier(
+            final int api,
+            final Type currentClass,
+            final Type currentSuperClass,
+            final List<Type> currentClassInterfaces,
+            final boolean isInterface) {
+        super(api);
+        this.currentClass = currentClass;
+        this.currentSuperClass = currentSuperClass;
+        this.currentClassInterfaces = currentClassInterfaces;
+        this.isInterface = isInterface;
+    }
+
+    /**
+      * Sets the <code>ClassLoader</code> to be used in {@link #getClass}.
+      *
+      * @param loader the <code>ClassLoader</code> to use.
+      */
+    public void setClassLoader(final ClassLoader loader) {
+        this.loader = loader;
+    }
+
+    @Override
+    public BasicValue newValue(final Type type) {
+        if (type == null) {
+            return BasicValue.UNINITIALIZED_VALUE;
+        }
+
+        boolean isArray = type.getSort() == Type.ARRAY;
+        if (isArray) {
+            switch (type.getElementType().getSort()) {
+                case Type.BOOLEAN:
+                case Type.CHAR:
+                case Type.BYTE:
+                case Type.SHORT:
+                    return new BasicValue(type);
+                default:
+                    break;
+            }
+        }
+
+        BasicValue value = super.newValue(type);
+        if (BasicValue.REFERENCE_VALUE.equals(value)) {
+            if (isArray) {
+                value = newValue(type.getElementType());
+                StringBuilder descriptor = new StringBuilder();
+                for (int i = 0; i < type.getDimensions(); ++i) {
+                    descriptor.append('[');
+                }
+                descriptor.append(value.getType().getDescriptor());
+                value = new BasicValue(Type.getType(descriptor.toString()));
+            } else {
+                value = new BasicValue(type);
+            }
+        }
+        return value;
+    }
+
+    @Override
+    protected boolean isArrayValue(final BasicValue value) {
+        Type type = value.getType();
+        return type != null && (type.getSort() == Type.ARRAY || type.equals(NULL_TYPE));
+    }
+
+    @Override
+    protected BasicValue getElementValue(final BasicValue objectArrayValue) throws AnalyzerException {
+        Type arrayType = objectArrayValue.getType();
+        if (arrayType != null) {
+            if (arrayType.getSort() == Type.ARRAY) {
+                return newValue(Type.getType(arrayType.getDescriptor().substring(1)));
+            } else if (arrayType.equals(NULL_TYPE)) {
+                return objectArrayValue;
+            }
+        }
+        throw new AssertionError();
+    }
+
+    @Override
+    protected boolean isSubTypeOf(final BasicValue value, final BasicValue expected) {
+        Type expectedType = expected.getType();
+        Type type = value.getType();
+        switch (expectedType.getSort()) {
+            case Type.INT:
+            case Type.FLOAT:
+            case Type.LONG:
+            case Type.DOUBLE:
+                return type.equals(expectedType);
+            case Type.ARRAY:
+            case Type.OBJECT:
+                if (type.equals(NULL_TYPE)) {
+                    return true;
+                } else if (type.getSort() == Type.OBJECT || type.getSort() == Type.ARRAY) {
+                    if (isAssignableFrom(expectedType, type)) {
+                        return true;
+                    } else if (getClass(expectedType).isInterface()) {
+                        // The merge of class or interface types can only yield class types (because it is not
+                        // possible in general to find an unambiguous common super interface, due to multiple
+                        // inheritance). Because of this limitation, we need to relax the subtyping check here
+                        // if 'value' is an interface.
+                        return Object.class.isAssignableFrom(getClass(type));
+                    } else {
+                        return false;
+                    }
+                } else {
+                    return false;
+                }
+            default:
+                throw new AssertionError();
+        }
+    }
+
+    @Override
+    public BasicValue merge(final BasicValue value1, final BasicValue value2) {
+        if (!value1.equals(value2)) {
+            Type type1 = value1.getType();
+            Type type2 = value2.getType();
+            if (type1 != null
+                    && (type1.getSort() == Type.OBJECT || type1.getSort() == Type.ARRAY)
+                    && type2 != null
+                    && (type2.getSort() == Type.OBJECT || type2.getSort() == Type.ARRAY)) {
+                if (type1.equals(NULL_TYPE)) {
+                    return value2;
+                }
+                if (type2.equals(NULL_TYPE)) {
+                    return value1;
+                }
+                if (isAssignableFrom(type1, type2)) {
+                    return value1;
+                }
+                if (isAssignableFrom(type2, type1)) {
+                    return value2;
+                }
+                int numDimensions = 0;
+                if (type1.getSort() == Type.ARRAY
+                        && type2.getSort() == Type.ARRAY
+                        && type1.getDimensions() == type2.getDimensions()
+                        && type1.getElementType().getSort() == Type.OBJECT
+                        && type2.getElementType().getSort() == Type.OBJECT) {
+                    numDimensions = type1.getDimensions();
+                    type1 = type1.getElementType();
+                    type2 = type2.getElementType();
+                }
+                while (true) {
+                    if (type1 == null || isInterface(type1)) {
+                        return newArrayValue(Type.getObjectType("java/lang/Object"), numDimensions);
+                    }
+                    type1 = getSuperClass(type1);
+                    if (isAssignableFrom(type1, type2)) {
+                        return newArrayValue(type1, numDimensions);
+                    }
+                }
+            }
+            return BasicValue.UNINITIALIZED_VALUE;
+        }
+        return value1;
+    }
+
+    private BasicValue newArrayValue(final Type type, final int dimensions) {
+        if (dimensions == 0) {
+            return newValue(type);
+        } else {
+            StringBuilder descriptor = new StringBuilder();
+            for (int i = 0; i < dimensions; ++i) {
+                descriptor.append('[');
+            }
+            descriptor.append(type.getDescriptor());
+            return newValue(Type.getType(descriptor.toString()));
+        }
+    }
+
+    /**
+      * Returns whether the given type corresponds to the type of an interface. The default
+      * implementation of this method loads the class and uses the reflection API to return its result
+      * (unless the given type corresponds to the class being verified).
+      *
+      * @param type a type.
+      * @return whether 'type' corresponds to an interface.
+      */
+    protected boolean isInterface(final Type type) {
+        if (currentClass != null && currentClass.equals(type)) {
+            return isInterface;
+        }
+        return getClass(type).isInterface();
+    }
+
+    /**
+      * Returns the type corresponding to the super class of the given type. The default implementation
+      * of this method loads the class and uses the reflection API to return its result (unless the
+      * given type corresponds to the class being verified).
+      *
+      * @param type a type.
+      * @return the type corresponding to the super class of 'type'.
+      */
+    protected Type getSuperClass(final Type type) {
+        if (currentClass != null && currentClass.equals(type)) {
+            return currentSuperClass;
+        }
+        Class<?> superClass = getClass(type).getSuperclass();
+        return superClass == null ? null : Type.getType(superClass);
+    }
+
+    /**
+      * Returns whether the class corresponding to the first argument is either the same as, or is a
+      * superclass or superinterface of the class corresponding to the second argument. The default
+      * implementation of this method loads the classes and uses the reflection API to return its
+      * result (unless the result can be computed from the class being verified, and the types of its
+      * super classes and implemented interfaces).
+      *
+      * @param type1 a type.
+      * @param type2 another type.
+      * @return whether the class corresponding to 'type1' is either the same as, or is a superclass or
+      *     superinterface of the class corresponding to 'type2'.
+      */
+    protected boolean isAssignableFrom(final Type type1, final Type type2) {
+        if (type1.equals(type2)) {
+            return true;
+        }
+        if (currentClass != null && currentClass.equals(type1)) {
+            if (getSuperClass(type2) == null) {
+                return false;
+            } else {
+                if (isInterface) {
+                    return type2.getSort() == Type.OBJECT || type2.getSort() == Type.ARRAY;
+                }
+                return isAssignableFrom(type1, getSuperClass(type2));
+            }
+        }
+        if (currentClass != null && currentClass.equals(type2)) {
+            if (isAssignableFrom(type1, currentSuperClass)) {
+                return true;
+            }
+            if (currentClassInterfaces != null) {
+                for (Type currentClassInterface : currentClassInterfaces) {
+                    if (isAssignableFrom(type1, currentClassInterface)) {
+                        return true;
+                    }
+                }
+            }
+            return false;
+        }
+        return getClass(type1).isAssignableFrom(getClass(type2));
+    }
+
+    /**
+      * Loads the class corresponding to the given type. The class is loaded with the class loader
+      * specified with {@link #setClassLoader}, or with the class loader of this class if no class
+      * loader was specified.
+      *
+      * @param type a type.
+      * @return the class corresponding to 'type'.
+      */
+    protected Class<?> getClass(final Type type) {
+        try {
+            if (type.getSort() == Type.ARRAY) {
+                return Class.forName(type.getDescriptor().replace('/', '.'), false, loader);
+            }
+            return Class.forName(type.getClassName(), false, loader);
+        } catch (ClassNotFoundException e) {
+            throw new TypeNotPresentException(e.toString(), e);
+        }
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/org/objectweb/asm/tree/analysis/SmallSet$IteratorImpl.class b/tests/test_data/std/jdk/internal/org/objectweb/asm/tree/analysis/SmallSet$IteratorImpl.class
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diff --git a/tests/test_data/std/jdk/internal/org/objectweb/asm/tree/analysis/SmallSet.class b/tests/test_data/std/jdk/internal/org/objectweb/asm/tree/analysis/SmallSet.class
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diff --git a/tests/test_data/std/jdk/internal/org/objectweb/asm/tree/analysis/SmallSet.java b/tests/test_data/std/jdk/internal/org/objectweb/asm/tree/analysis/SmallSet.java
new file mode 100644
index 00000000..3c85d565
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/org/objectweb/asm/tree/analysis/SmallSet.java
@@ -0,0 +1,230 @@
+/*
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/*
+ * This file is available under and governed by the GNU General Public
+ * License version 2 only, as published by the Free Software Foundation.
+ * However, the following notice accompanied the original version of this
+ * file:
+ *
+ * ASM: a very small and fast Java bytecode manipulation framework
+ * Copyright (c) 2000-2011 INRIA, France Telecom
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the copyright holders nor the names of its
+ *    contributors may be used to endorse or promote products derived from
+ *    this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+package jdk.internal.org.objectweb.asm.tree.analysis;
+
+import java.util.AbstractSet;
+import java.util.HashSet;
+import java.util.Iterator;
+import java.util.NoSuchElementException;
+import java.util.Set;
+
+/**
+ * An immutable set of at most two elements, optimized for speed compared to a generic set
+ * implementation.
+ *
+ * @author Eric Bruneton
+ */
+final class SmallSet<T> extends AbstractSet<T> {
+
+    /** The first element of this set, maybe {@literal null}. */
+    private final T element1;
+
+    /**
+      * The second element of this set, maybe {@literal null}. If {@link #element1} is {@literal null}
+      * then this field must be {@literal null}, otherwise it must be different from {@link #element1}.
+      */
+    private final T element2;
+
+    // -----------------------------------------------------------------------------------------------
+    // Constructors
+    // -----------------------------------------------------------------------------------------------
+
+    /** Constructs an empty set. */
+    SmallSet() {
+        this.element1 = null;
+        this.element2 = null;
+    }
+
+    /**
+      * Constructs a set with exactly one element.
+      *
+      * @param element the unique set element.
+      */
+    SmallSet(final T element) {
+        this.element1 = element;
+        this.element2 = null;
+    }
+
+    /**
+      * Constructs a new {@link SmallSet}.
+      *
+      * @param element1 see {@link #element1}.
+      * @param element2 see {@link #element2}.
+      */
+    private SmallSet(final T element1, final T element2) {
+        this.element1 = element1;
+        this.element2 = element2;
+    }
+
+    // -----------------------------------------------------------------------------------------------
+    // Implementation of the inherited abstract methods
+    // -----------------------------------------------------------------------------------------------
+
+    @Override
+    public Iterator<T> iterator() {
+        return new IteratorImpl<>(element1, element2);
+    }
+
+    @Override
+    public int size() {
+        if (element1 == null) {
+            return 0;
+        } else if (element2 == null) {
+            return 1;
+        } else {
+            return 2;
+        }
+    }
+
+    // -----------------------------------------------------------------------------------------------
+    // Utility methods
+    // -----------------------------------------------------------------------------------------------
+
+    /**
+      * Returns the union of this set and of the given set.
+      *
+      * @param otherSet another small set.
+      * @return the union of this set and of otherSet.
+      */
+    Set<T> union(final SmallSet<T> otherSet) {
+        // If the two sets are equal, return this set.
+        if ((otherSet.element1 == element1 && otherSet.element2 == element2)
+                || (otherSet.element1 == element2 && otherSet.element2 == element1)) {
+            return this;
+        }
+        // If one set is empty, return the other.
+        if (otherSet.element1 == null) {
+            return this;
+        }
+        if (element1 == null) {
+            return otherSet;
+        }
+
+        // At this point we know that the two sets are non empty and are different.
+        // If otherSet contains exactly one element:
+        if (otherSet.element2 == null) {
+            // If this set also contains exactly one element, we have two distinct elements.
+            if (element2 == null) {
+                return new SmallSet<>(element1, otherSet.element1);
+            }
+            // If otherSet is included in this set, return this set.
+            if (otherSet.element1 == element1 || otherSet.element1 == element2) {
+                return this;
+            }
+        }
+        // If this set contains exactly one element, then otherSet contains two elements (because of the
+        // above tests). Thus, if otherSet contains this set, return otherSet:
+        if (element2 == null && (element1 == otherSet.element1 || element1 == otherSet.element2)) {
+            return otherSet;
+        }
+
+        // At this point we know that there are at least 3 distinct elements, so we need a generic set
+        // to store the result.
+        HashSet<T> result = new HashSet<>(4);
+        result.add(element1);
+        if (element2 != null) {
+            result.add(element2);
+        }
+        result.add(otherSet.element1);
+        if (otherSet.element2 != null) {
+            result.add(otherSet.element2);
+        }
+        return result;
+    }
+
+    static class IteratorImpl<T> implements Iterator<T> {
+
+        /** The next element to return in {@link #next}. Maybe {@literal null}. */
+        private T firstElement;
+
+        /**
+          * The element to return in {@link #next}, after {@link #firstElement} is returned. If {@link
+          * #firstElement} is {@literal null} then this field must be {@literal null}, otherwise it must
+          * be different from {@link #firstElement}.
+          */
+        private T secondElement;
+
+        IteratorImpl(final T firstElement, final T secondElement) {
+            this.firstElement = firstElement;
+            this.secondElement = secondElement;
+        }
+
+        @Override
+        public boolean hasNext() {
+            return firstElement != null;
+        }
+
+        @Override
+        public T next() {
+            if (firstElement == null) {
+                throw new NoSuchElementException();
+            }
+            T element = firstElement;
+            firstElement = secondElement;
+            secondElement = null;
+            return element;
+        }
+
+        @Override
+        public void remove() {
+            throw new UnsupportedOperationException();
+        }
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/org/objectweb/asm/tree/analysis/SourceInterpreter.class b/tests/test_data/std/jdk/internal/org/objectweb/asm/tree/analysis/SourceInterpreter.class
new file mode 100644
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GIT binary patch
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HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/org/objectweb/asm/tree/analysis/SourceInterpreter.java b/tests/test_data/std/jdk/internal/org/objectweb/asm/tree/analysis/SourceInterpreter.java
new file mode 100644
index 00000000..d92ffce0
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/org/objectweb/asm/tree/analysis/SourceInterpreter.java
@@ -0,0 +1,252 @@
+/*
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/*
+ * This file is available under and governed by the GNU General Public
+ * License version 2 only, as published by the Free Software Foundation.
+ * However, the following notice accompanied the original version of this
+ * file:
+ *
+ * ASM: a very small and fast Java bytecode manipulation framework
+ * Copyright (c) 2000-2011 INRIA, France Telecom
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the copyright holders nor the names of its
+ *    contributors may be used to endorse or promote products derived from
+ *    this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+package jdk.internal.org.objectweb.asm.tree.analysis;
+
+import java.util.HashSet;
+import java.util.List;
+import java.util.Set;
+import jdk.internal.org.objectweb.asm.Opcodes;
+import jdk.internal.org.objectweb.asm.Type;
+import jdk.internal.org.objectweb.asm.tree.AbstractInsnNode;
+import jdk.internal.org.objectweb.asm.tree.FieldInsnNode;
+import jdk.internal.org.objectweb.asm.tree.InvokeDynamicInsnNode;
+import jdk.internal.org.objectweb.asm.tree.LdcInsnNode;
+import jdk.internal.org.objectweb.asm.tree.MethodInsnNode;
+
+/**
+ * An {@link Interpreter} for {@link SourceValue} values.
+ *
+ * @author Eric Bruneton
+ */
+public class SourceInterpreter extends Interpreter<SourceValue> implements Opcodes {
+
+    /**
+      * Constructs a new {@link SourceInterpreter} for the latest ASM API version. <i>Subclasses must
+      * not use this constructor</i>. Instead, they must use the {@link #SourceInterpreter(int)}
+      * version.
+      */
+    public SourceInterpreter() {
+        super(/* latest api = */ ASM9);
+        if (getClass() != SourceInterpreter.class) {
+            throw new IllegalStateException();
+        }
+    }
+
+    /**
+      * Constructs a new {@link SourceInterpreter}.
+      *
+      * @param api the ASM API version supported by this interpreter. Must be one of the {@code
+      *     ASM}<i>x</i> values in {@link Opcodes}.
+      */
+    protected SourceInterpreter(final int api) {
+        super(api);
+    }
+
+    @Override
+    public SourceValue newValue(final Type type) {
+        if (type == Type.VOID_TYPE) {
+            return null;
+        }
+        return new SourceValue(type == null ? 1 : type.getSize());
+    }
+
+    @Override
+    public SourceValue newOperation(final AbstractInsnNode insn) {
+        int size;
+        switch (insn.getOpcode()) {
+            case LCONST_0:
+            case LCONST_1:
+            case DCONST_0:
+            case DCONST_1:
+                size = 2;
+                break;
+            case LDC:
+                Object value = ((LdcInsnNode) insn).cst;
+                size = value instanceof Long || value instanceof Double ? 2 : 1;
+                break;
+            case GETSTATIC:
+                size = Type.getType(((FieldInsnNode) insn).desc).getSize();
+                break;
+            default:
+                size = 1;
+                break;
+        }
+        return new SourceValue(size, insn);
+    }
+
+    @Override
+    public SourceValue copyOperation(final AbstractInsnNode insn, final SourceValue value) {
+        return new SourceValue(value.getSize(), insn);
+    }
+
+    @Override
+    public SourceValue unaryOperation(final AbstractInsnNode insn, final SourceValue value) {
+        int size;
+        switch (insn.getOpcode()) {
+            case LNEG:
+            case DNEG:
+            case I2L:
+            case I2D:
+            case L2D:
+            case F2L:
+            case F2D:
+            case D2L:
+                size = 2;
+                break;
+            case GETFIELD:
+                size = Type.getType(((FieldInsnNode) insn).desc).getSize();
+                break;
+            default:
+                size = 1;
+                break;
+        }
+        return new SourceValue(size, insn);
+    }
+
+    @Override
+    public SourceValue binaryOperation(
+            final AbstractInsnNode insn, final SourceValue value1, final SourceValue value2) {
+        int size;
+        switch (insn.getOpcode()) {
+            case LALOAD:
+            case DALOAD:
+            case LADD:
+            case DADD:
+            case LSUB:
+            case DSUB:
+            case LMUL:
+            case DMUL:
+            case LDIV:
+            case DDIV:
+            case LREM:
+            case DREM:
+            case LSHL:
+            case LSHR:
+            case LUSHR:
+            case LAND:
+            case LOR:
+            case LXOR:
+                size = 2;
+                break;
+            default:
+                size = 1;
+                break;
+        }
+        return new SourceValue(size, insn);
+    }
+
+    @Override
+    public SourceValue ternaryOperation(
+            final AbstractInsnNode insn,
+            final SourceValue value1,
+            final SourceValue value2,
+            final SourceValue value3) {
+        return new SourceValue(1, insn);
+    }
+
+    @Override
+    public SourceValue naryOperation(
+            final AbstractInsnNode insn, final List<? extends SourceValue> values) {
+        int size;
+        int opcode = insn.getOpcode();
+        if (opcode == MULTIANEWARRAY) {
+            size = 1;
+        } else if (opcode == INVOKEDYNAMIC) {
+            size = Type.getReturnType(((InvokeDynamicInsnNode) insn).desc).getSize();
+        } else {
+            size = Type.getReturnType(((MethodInsnNode) insn).desc).getSize();
+        }
+        return new SourceValue(size, insn);
+    }
+
+    @Override
+    public void returnOperation(
+            final AbstractInsnNode insn, final SourceValue value, final SourceValue expected) {
+        // Nothing to do.
+    }
+
+    @Override
+    public SourceValue merge(final SourceValue value1, final SourceValue value2) {
+        if (value1.insns instanceof SmallSet && value2.insns instanceof SmallSet) {
+            Set<AbstractInsnNode> setUnion =
+                    ((SmallSet<AbstractInsnNode>) value1.insns)
+                            .union((SmallSet<AbstractInsnNode>) value2.insns);
+            if (setUnion == value1.insns && value1.size == value2.size) {
+                return value1;
+            } else {
+                return new SourceValue(Math.min(value1.size, value2.size), setUnion);
+            }
+        }
+        if (value1.size != value2.size || !containsAll(value1.insns, value2.insns)) {
+            HashSet<AbstractInsnNode> setUnion = new HashSet<>();
+            setUnion.addAll(value1.insns);
+            setUnion.addAll(value2.insns);
+            return new SourceValue(Math.min(value1.size, value2.size), setUnion);
+        }
+        return value1;
+    }
+
+    private static <E> boolean containsAll(final Set<E> self, final Set<E> other) {
+        if (self.size() < other.size()) {
+            return false;
+        }
+        return self.containsAll(other);
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/org/objectweb/asm/tree/analysis/SourceValue.class b/tests/test_data/std/jdk/internal/org/objectweb/asm/tree/analysis/SourceValue.class
new file mode 100644
index 0000000000000000000000000000000000000000..3681f020d3c23c32d429ad1c0108bfea31bae3c0
GIT binary patch
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/org/objectweb/asm/tree/analysis/SourceValue.java b/tests/test_data/std/jdk/internal/org/objectweb/asm/tree/analysis/SourceValue.java
new file mode 100644
index 00000000..5403130a
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/org/objectweb/asm/tree/analysis/SourceValue.java
@@ -0,0 +1,151 @@
+/*
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/*
+ * This file is available under and governed by the GNU General Public
+ * License version 2 only, as published by the Free Software Foundation.
+ * However, the following notice accompanied the original version of this
+ * file:
+ *
+ * ASM: a very small and fast Java bytecode manipulation framework
+ * Copyright (c) 2000-2011 INRIA, France Telecom
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the copyright holders nor the names of its
+ *    contributors may be used to endorse or promote products derived from
+ *    this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+package jdk.internal.org.objectweb.asm.tree.analysis;
+
+import java.util.Set;
+import jdk.internal.org.objectweb.asm.tree.AbstractInsnNode;
+
+/**
+ * A {@link Value} which keeps track of the bytecode instructions that can produce it.
+ *
+ * @author Eric Bruneton
+ */
+public class SourceValue implements Value {
+
+    /**
+      * The size of this value, in 32 bits words. This size is 1 for byte, boolean, char, short, int,
+      * float, object and array types, and 2 for long and double.
+      */
+    public final int size;
+
+    /**
+      * The instructions that can produce this value. For example, for the Java code below, the
+      * instructions that can produce the value of {@code i} at line 5 are the two ISTORE instructions
+      * at line 1 and 3:
+      *
+      * <pre>
+      * 1: i = 0;
+      * 2: if (...) {
+      * 3:   i = 1;
+      * 4: }
+      * 5: return i;
+      * </pre>
+      */
+    public final Set<AbstractInsnNode> insns;
+
+    /**
+      * Constructs a new {@link SourceValue}.
+      *
+      * @param size the size of this value, in 32 bits words. This size is 1 for byte, boolean, char,
+      *     short, int, float, object and array types, and 2 for long and double.
+      */
+    public SourceValue(final int size) {
+        this(size, new SmallSet<>());
+    }
+
+    /**
+      * Constructs a new {@link SourceValue}.
+      *
+      * @param size the size of this value, in 32 bits words. This size is 1 for byte, boolean, char,
+      *     short, int, float, object and array types, and 2 for long and double.
+      * @param insnNode an instruction that can produce this value.
+      */
+    public SourceValue(final int size, final AbstractInsnNode insnNode) {
+        this.size = size;
+        this.insns = new SmallSet<>(insnNode);
+    }
+
+    /**
+      * Constructs a new {@link SourceValue}.
+      *
+      * @param size the size of this value, in 32 bits words. This size is 1 for byte, boolean, char,
+      *     short, int, float, object and array types, and 2 for long and double.
+      * @param insnSet the instructions that can produce this value.
+      */
+    public SourceValue(final int size, final Set<AbstractInsnNode> insnSet) {
+        this.size = size;
+        this.insns = insnSet;
+    }
+
+    /**
+      * Returns the size of this value.
+      *
+      * @return the size of this value, in 32 bits words. This size is 1 for byte, boolean, char,
+      *     short, int, float, object and array types, and 2 for long and double.
+      */
+    @Override
+    public int getSize() {
+        return size;
+    }
+
+    @Override
+    public boolean equals(final Object value) {
+        if (!(value instanceof SourceValue)) {
+            return false;
+        }
+        SourceValue sourceValue = (SourceValue) value;
+        return size == sourceValue.size && insns.equals(sourceValue.insns);
+    }
+
+    @Override
+    public int hashCode() {
+        return insns.hashCode();
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/org/objectweb/asm/tree/analysis/Subroutine.class b/tests/test_data/std/jdk/internal/org/objectweb/asm/tree/analysis/Subroutine.class
new file mode 100644
index 0000000000000000000000000000000000000000..75f3d122ea8f07f0cdfdf7d310b61e172cdb691e
GIT binary patch
literal 1782
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z>V_G<y5KL+Wf!nv!%RXZh3Ry|hJV0cVW91KvfCt(g=g4E?_J$@?m6eZ`}D`dd-nm9
zQAr|(xDL%gANmE-Yw|N`I?`>J@7C6=dMMDpV7qo$5{T#W%LyDpLPyfTVHg5)Ypd&~
z?S_``O2_p4hUrDCKDTP744P)>Tb3#LtsU5bxzwupUMsX+OQ0_ZrB8IT+6zQg)-30W
zw`vs?fdK=9NDCw#uP&Y7y}()(h<&i4<A}g;q<~c%^StlNcGV8TB!&=ID@P2B;u!&*
z>m17uD7d<tuTqPLF@~c$ju{w7R$yTNXSyI)S#2cOS+~cjVtyrw<2a!sZQyylK#g_B
zQ(7~*{C~3*rwQfyivnX^w1{=tBei;Hdu}nmtk_H%$RRJF1@<kXaT_WsJZ0b|oaVe?
z(Z`Wo<$xkOOo5qR9KPIY-l({Nt4vntFB>?c^dG8wZYXV+Rwb6~hAYFCPZAgYW!pke
z+qkz#u~ZbWD7=Rgw7dP4p7QtA$uHBoGGz%2R(bZWw3;=`zbb1EBS)(02rWzBR`YI9
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z>JoarOUUIqC8W?Hv<Y2tn%YF_7d-a>$DdGRB(sf^q_@jyl)?a;2y3)pog5wH(Tw<v
zc2J-4Dc}t<qt!T%H#@b(1i2`Ljrd}`l%?#{{kxb@wX?I|V?+hAvv*)b1MRA|csnkB
zeDo(1bcXaFQ06j4YzL<V?&7Q(XLnGD;Q^-SH6~@ov>nXEa0f$AX3Ezt)bHazv3wlL
z;CT%2d6Tr;NZ}T*!VQ}H1@Eplrtu|(e1%K+8rSd*Ebil{xQ&3ZHol7lm$*S1x1mh4
z<IEb5%+^q(<((LXKDA?`Ylo_K0dKMDMOGh1|3A=#IQbX){^k#Aj&FMPHb2F1=`oOZ
Bu~`5B

literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/org/objectweb/asm/tree/analysis/Subroutine.java b/tests/test_data/std/jdk/internal/org/objectweb/asm/tree/analysis/Subroutine.java
new file mode 100644
index 00000000..67267e01
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/org/objectweb/asm/tree/analysis/Subroutine.java
@@ -0,0 +1,138 @@
+/*
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/*
+ * This file is available under and governed by the GNU General Public
+ * License version 2 only, as published by the Free Software Foundation.
+ * However, the following notice accompanied the original version of this
+ * file:
+ *
+ * ASM: a very small and fast Java bytecode manipulation framework
+ * Copyright (c) 2000-2011 INRIA, France Telecom
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the copyright holders nor the names of its
+ *    contributors may be used to endorse or promote products derived from
+ *    this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+package jdk.internal.org.objectweb.asm.tree.analysis;
+
+import java.util.ArrayList;
+import java.util.List;
+import jdk.internal.org.objectweb.asm.tree.JumpInsnNode;
+import jdk.internal.org.objectweb.asm.tree.LabelNode;
+
+/**
+ * A method subroutine (corresponds to a JSR instruction).
+ *
+ * @author Eric Bruneton
+ */
+final class Subroutine {
+
+    /** The start of this subroutine. */
+    final LabelNode start;
+
+    /**
+      * The local variables that are read or written by this subroutine. The i-th element is true if
+      * and only if the local variable at index i is read or written by this subroutine.
+      */
+    final boolean[] localsUsed;
+
+    /** The JSR instructions that jump to this subroutine. */
+    final List<JumpInsnNode> callers;
+
+    /**
+      * Constructs a new {@link Subroutine}.
+      *
+      * @param start the start of this subroutine.
+      * @param maxLocals the local variables that are read or written by this subroutine.
+      * @param caller a JSR instruction that jump to this subroutine.
+      */
+    Subroutine(final LabelNode start, final int maxLocals, final JumpInsnNode caller) {
+        this.start = start;
+        this.localsUsed = new boolean[maxLocals];
+        this.callers = new ArrayList<>();
+        callers.add(caller);
+    }
+
+    /**
+      * Constructs a copy of the given {@link Subroutine}.
+      *
+      * @param subroutine the subroutine to copy.
+      */
+    Subroutine(final Subroutine subroutine) {
+        this.start = subroutine.start;
+        this.localsUsed = subroutine.localsUsed.clone();
+        this.callers = new ArrayList<>(subroutine.callers);
+    }
+
+    /**
+      * Merges the given subroutine into this subroutine. The local variables read or written by the
+      * given subroutine are marked as read or written by this one, and the callers of the given
+      * subroutine are added as callers of this one (if both have the same start).
+      *
+      * @param subroutine another subroutine. This subroutine is left unchanged by this method.
+      * @return whether this subroutine has been modified by this method.
+      */
+    public boolean merge(final Subroutine subroutine) {
+        boolean changed = false;
+        for (int i = 0; i < localsUsed.length; ++i) {
+            if (subroutine.localsUsed[i] && !localsUsed[i]) {
+                localsUsed[i] = true;
+                changed = true;
+            }
+        }
+        if (subroutine.start == start) {
+            for (int i = 0; i < subroutine.callers.size(); ++i) {
+                JumpInsnNode caller = subroutine.callers.get(i);
+                if (!callers.contains(caller)) {
+                    callers.add(caller);
+                    changed = true;
+                }
+            }
+        }
+        return changed;
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/org/objectweb/asm/tree/analysis/Value.class b/tests/test_data/std/jdk/internal/org/objectweb/asm/tree/analysis/Value.class
new file mode 100644
index 0000000000000000000000000000000000000000..de71099197cceb65be1d97eae31321a5c6ec41ea
GIT binary patch
literal 160
zcmW-bu?oUK5JYFA<}{U`p^Xdvf*@E~1nf6)374D+TrP@!nuQ<WM~Rm-!>}`NneXrY
z0dT;|AR+AQYs0n;>RWN#`HH)u)-pV_VCiohyedn~p1tk)B5qKFIbmJPUD!!m@p%FW
rrqYnxml9^1?TL`(-QY_-S{F~*gziQvCB#bH08sq2Ksq{@s0o&TVJ|3;

literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/org/objectweb/asm/tree/analysis/Value.java b/tests/test_data/std/jdk/internal/org/objectweb/asm/tree/analysis/Value.java
new file mode 100644
index 00000000..7058c959
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/org/objectweb/asm/tree/analysis/Value.java
@@ -0,0 +1,76 @@
+/*
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/*
+ * This file is available under and governed by the GNU General Public
+ * License version 2 only, as published by the Free Software Foundation.
+ * However, the following notice accompanied the original version of this
+ * file:
+ *
+ * ASM: a very small and fast Java bytecode manipulation framework
+ * Copyright (c) 2000-2011 INRIA, France Telecom
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the copyright holders nor the names of its
+ *    contributors may be used to endorse or promote products derived from
+ *    this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+package jdk.internal.org.objectweb.asm.tree.analysis;
+
+/**
+ * An immutable symbolic value for the semantic interpretation of bytecode.
+ *
+ * @author Eric Bruneton
+ */
+public interface Value {
+
+    /**
+      * Returns the size of this value in 32 bits words. This size should be 1 for byte, boolean, char,
+      * short, int, float, object and array types, and 2 for long and double.
+      *
+      * @return either 1 or 2.
+      */
+    int getSize();
+}
diff --git a/tests/test_data/std/jdk/internal/org/objectweb/asm/util/ASMifier.class b/tests/test_data/std/jdk/internal/org/objectweb/asm/util/ASMifier.class
new file mode 100644
index 0000000000000000000000000000000000000000..d964f94dd90010b60949e182fff1c18257090ecc
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HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/org/objectweb/asm/util/ASMifier.java b/tests/test_data/std/jdk/internal/org/objectweb/asm/util/ASMifier.java
new file mode 100644
index 00000000..074c8029
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/org/objectweb/asm/util/ASMifier.java
@@ -0,0 +1,1647 @@
+/*
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/*
+ * This file is available under and governed by the GNU General Public
+ * License version 2 only, as published by the Free Software Foundation.
+ * However, the following notice accompanied the original version of this
+ * file:
+ *
+ * ASM: a very small and fast Java bytecode manipulation framework
+ * Copyright (c) 2000-2011 INRIA, France Telecom
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the copyright holders nor the names of its
+ *    contributors may be used to endorse or promote products derived from
+ *    this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+package jdk.internal.org.objectweb.asm.util;
+
+import java.io.IOException;
+import java.io.PrintWriter;
+import java.util.Arrays;
+import java.util.Collections;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import jdk.internal.org.objectweb.asm.Attribute;
+import jdk.internal.org.objectweb.asm.ConstantDynamic;
+import jdk.internal.org.objectweb.asm.Handle;
+import jdk.internal.org.objectweb.asm.Label;
+import jdk.internal.org.objectweb.asm.Opcodes;
+import jdk.internal.org.objectweb.asm.Type;
+import jdk.internal.org.objectweb.asm.TypePath;
+
+/**
+ * A {@link Printer} that prints the ASM code to generate the classes it visits.
+ *
+ * @author Eric Bruneton
+ */
+// DontCheck(AbbreviationAsWordInName): can't be renamed (for backward binary compatibility).
+public class ASMifier extends Printer {
+
+    /** The help message shown when command line arguments are incorrect. */
+    private static final String USAGE =
+            "Prints the ASM code to generate the given class.\n"
+                    + "Usage: ASMifier [-nodebug] <fully qualified class name or class file name>";
+
+    /** A pseudo access flag used to distinguish class access flags. */
+    private static final int ACCESS_CLASS = 0x40000;
+
+    /** A pseudo access flag used to distinguish field access flags. */
+    private static final int ACCESS_FIELD = 0x80000;
+
+    /** A pseudo access flag used to distinguish inner class flags. */
+    private static final int ACCESS_INNER = 0x100000;
+
+    /** A pseudo access flag used to distinguish module requires / exports flags. */
+    private static final int ACCESS_MODULE = 0x200000;
+
+    private static final String ANNOTATION_VISITOR = "annotationVisitor";
+    private static final String ANNOTATION_VISITOR0 = "annotationVisitor0 = ";
+    private static final String COMMA = "\", \"";
+    private static final String END_ARRAY = " });\n";
+    private static final String END_PARAMETERS = ");\n\n";
+    private static final String NEW_OBJECT_ARRAY = ", new Object[] {";
+    private static final String VISIT_END = ".visitEnd();\n";
+
+    private static final List<String> FRAME_TYPES =
+            Collections.unmodifiableList(
+                    Arrays.asList(
+                            "Opcodes.TOP",
+                            "Opcodes.INTEGER",
+                            "Opcodes.FLOAT",
+                            "Opcodes.DOUBLE",
+                            "Opcodes.LONG",
+                            "Opcodes.NULL",
+                            "Opcodes.UNINITIALIZED_THIS"));
+
+    private static final Map<Integer, String> CLASS_VERSIONS;
+
+    static {
+        HashMap<Integer, String> classVersions = new HashMap<>();
+        classVersions.put(Opcodes.V1_1, "V1_1");
+        classVersions.put(Opcodes.V1_2, "V1_2");
+        classVersions.put(Opcodes.V1_3, "V1_3");
+        classVersions.put(Opcodes.V1_4, "V1_4");
+        classVersions.put(Opcodes.V1_5, "V1_5");
+        classVersions.put(Opcodes.V1_6, "V1_6");
+        classVersions.put(Opcodes.V1_7, "V1_7");
+        classVersions.put(Opcodes.V1_8, "V1_8");
+        classVersions.put(Opcodes.V9, "V9");
+        classVersions.put(Opcodes.V10, "V10");
+        classVersions.put(Opcodes.V11, "V11");
+        classVersions.put(Opcodes.V12, "V12");
+        classVersions.put(Opcodes.V13, "V13");
+        classVersions.put(Opcodes.V14, "V14");
+        classVersions.put(Opcodes.V15, "V15");
+        classVersions.put(Opcodes.V16, "V16");
+        classVersions.put(Opcodes.V17, "V17");
+        classVersions.put(Opcodes.V18, "V18");
+        classVersions.put(Opcodes.V19, "V19");
+        classVersions.put(Opcodes.V20, "V20");
+        classVersions.put(Opcodes.V21, "V21");
+        classVersions.put(Opcodes.V22, "V22");
+        classVersions.put(Opcodes.V23, "V23");
+        CLASS_VERSIONS = Collections.unmodifiableMap(classVersions);
+    }
+
+    /** The name of the visitor variable in the produced code. */
+    protected final String name;
+
+    /** The identifier of the annotation visitor variable in the produced code. */
+    protected final int id;
+
+    /** The name of the Label variables in the produced code. */
+    protected Map<Label, String> labelNames;
+
+    /**
+      * Constructs a new {@link ASMifier}. <i>Subclasses must not use this constructor</i>. Instead,
+      * they must use the {@link #ASMifier(int, String, int)} version.
+      *
+      * @throws IllegalStateException If a subclass calls this constructor.
+      */
+    public ASMifier() {
+        this(/* latest api = */ Opcodes.ASM9, "classWriter", 0);
+        if (getClass() != ASMifier.class) {
+            throw new IllegalStateException();
+        }
+    }
+
+    /**
+      * Constructs a new {@link ASMifier}.
+      *
+      * @param api the ASM API version implemented by this class. Must be one of the {@code
+      *     ASM}<i>x</i> values in {@link Opcodes}.
+      * @param visitorVariableName the name of the visitor variable in the produced code.
+      * @param annotationVisitorId identifier of the annotation visitor variable in the produced code.
+      */
+    protected ASMifier(
+            final int api, final String visitorVariableName, final int annotationVisitorId) {
+        super(api);
+        this.name = visitorVariableName;
+        this.id = annotationVisitorId;
+    }
+
+    /**
+      * Prints the ASM source code to generate the given class to the standard output.
+      *
+      * <p>Usage: ASMifier [-nodebug] &lt;binary class name or class file name&gt;
+      *
+      * @param args the command line arguments.
+      * @throws IOException if the class cannot be found, or if an IOException occurs.
+      */
+    public static void main(final String[] args) throws IOException {
+        main(args, new PrintWriter(System.out, true), new PrintWriter(System.err, true));
+    }
+
+    /**
+      * Prints the ASM source code to generate the given class to the given output.
+      *
+      * <p>Usage: ASMifier [-nodebug] &lt;binary class name or class file name&gt;
+      *
+      * @param args the command line arguments.
+      * @param output where to print the result.
+      * @param logger where to log errors.
+      * @throws IOException if the class cannot be found, or if an IOException occurs.
+      */
+    static void main(final String[] args, final PrintWriter output, final PrintWriter logger)
+            throws IOException {
+        main(args, USAGE, new ASMifier(), output, logger);
+    }
+
+    // -----------------------------------------------------------------------------------------------
+    // Classes
+    // -----------------------------------------------------------------------------------------------
+
+    @Override
+    public void visit(
+            final int version,
+            final int access,
+            final String name,
+            final String signature,
+            final String superName,
+            final String[] interfaces) {
+        String simpleName;
+        if (name == null) {
+            simpleName = "module-info";
+        } else {
+            int lastSlashIndex = name.lastIndexOf('/');
+            if (lastSlashIndex == -1) {
+                simpleName = name;
+            } else {
+                text.add("package asm." + name.substring(0, lastSlashIndex).replace('/', '.') + ";\n");
+                simpleName = name.substring(lastSlashIndex + 1).replaceAll("[-\\(\\)]", "_");
+            }
+        }
+        text.add("import jdk.internal.org.objectweb.asm.AnnotationVisitor;\n");
+        text.add("import jdk.internal.org.objectweb.asm.Attribute;\n");
+        text.add("import jdk.internal.org.objectweb.asm.ClassReader;\n");
+        text.add("import jdk.internal.org.objectweb.asm.ClassWriter;\n");
+        text.add("import jdk.internal.org.objectweb.asm.ConstantDynamic;\n");
+        text.add("import jdk.internal.org.objectweb.asm.FieldVisitor;\n");
+        text.add("import jdk.internal.org.objectweb.asm.Handle;\n");
+        text.add("import jdk.internal.org.objectweb.asm.Label;\n");
+        text.add("import jdk.internal.org.objectweb.asm.MethodVisitor;\n");
+        text.add("import jdk.internal.org.objectweb.asm.Opcodes;\n");
+        text.add("import jdk.internal.org.objectweb.asm.RecordComponentVisitor;\n");
+        text.add("import jdk.internal.org.objectweb.asm.Type;\n");
+        text.add("import jdk.internal.org.objectweb.asm.TypePath;\n");
+        text.add("public class " + simpleName + "Dump implements Opcodes {\n\n");
+        text.add("public static byte[] dump () throws Exception {\n\n");
+        text.add("ClassWriter classWriter = new ClassWriter(0);\n");
+        text.add("FieldVisitor fieldVisitor;\n");
+        text.add("RecordComponentVisitor recordComponentVisitor;\n");
+        text.add("MethodVisitor methodVisitor;\n");
+        text.add("AnnotationVisitor annotationVisitor0;\n\n");
+
+        stringBuilder.setLength(0);
+        stringBuilder.append("classWriter.visit(");
+        String versionString = CLASS_VERSIONS.get(version);
+        if (versionString != null) {
+            stringBuilder.append(versionString);
+        } else {
+            stringBuilder.append(version);
+        }
+        stringBuilder.append(", ");
+        appendAccessFlags(access | ACCESS_CLASS);
+        stringBuilder.append(", ");
+        appendConstant(name);
+        stringBuilder.append(", ");
+        appendConstant(signature);
+        stringBuilder.append(", ");
+        appendConstant(superName);
+        stringBuilder.append(", ");
+        if (interfaces != null && interfaces.length > 0) {
+            stringBuilder.append("new String[] {");
+            for (int i = 0; i < interfaces.length; ++i) {
+                stringBuilder.append(i == 0 ? " " : ", ");
+                appendConstant(interfaces[i]);
+            }
+            stringBuilder.append(" }");
+        } else {
+            stringBuilder.append("null");
+        }
+        stringBuilder.append(END_PARAMETERS);
+        text.add(stringBuilder.toString());
+    }
+
+    @Override
+    public void visitSource(final String file, final String debug) {
+        stringBuilder.setLength(0);
+        stringBuilder.append("classWriter.visitSource(");
+        appendConstant(file);
+        stringBuilder.append(", ");
+        appendConstant(debug);
+        stringBuilder.append(END_PARAMETERS);
+        text.add(stringBuilder.toString());
+    }
+
+    @Override
+    public Printer visitModule(final String name, final int flags, final String version) {
+        stringBuilder.setLength(0);
+        stringBuilder.append("{\n");
+        stringBuilder.append("ModuleVisitor moduleVisitor = classWriter.visitModule(");
+        appendConstant(name);
+        stringBuilder.append(", ");
+        appendAccessFlags(flags | ACCESS_MODULE);
+        stringBuilder.append(", ");
+        appendConstant(version);
+        stringBuilder.append(END_PARAMETERS);
+        text.add(stringBuilder.toString());
+        ASMifier asmifier = createASMifier("moduleVisitor", 0);
+        text.add(asmifier.getText());
+        text.add("}\n");
+        return asmifier;
+    }
+
+    @Override
+    public void visitNestHost(final String nestHost) {
+        stringBuilder.setLength(0);
+        stringBuilder.append("classWriter.visitNestHost(");
+        appendConstant(nestHost);
+        stringBuilder.append(END_PARAMETERS);
+        text.add(stringBuilder.toString());
+    }
+
+    @Override
+    public void visitOuterClass(final String owner, final String name, final String descriptor) {
+        stringBuilder.setLength(0);
+        stringBuilder.append("classWriter.visitOuterClass(");
+        appendConstant(owner);
+        stringBuilder.append(", ");
+        appendConstant(name);
+        stringBuilder.append(", ");
+        appendConstant(descriptor);
+        stringBuilder.append(END_PARAMETERS);
+        text.add(stringBuilder.toString());
+    }
+
+    @Override
+    public ASMifier visitClassAnnotation(final String descriptor, final boolean visible) {
+        return visitAnnotation(descriptor, visible);
+    }
+
+    @Override
+    public ASMifier visitClassTypeAnnotation(
+            final int typeRef, final TypePath typePath, final String descriptor, final boolean visible) {
+        return visitTypeAnnotation(typeRef, typePath, descriptor, visible);
+    }
+
+    @Override
+    public void visitClassAttribute(final Attribute attribute) {
+        visitAttribute(attribute);
+    }
+
+    @Override
+    public void visitNestMember(final String nestMember) {
+        stringBuilder.setLength(0);
+        stringBuilder.append("classWriter.visitNestMember(");
+        appendConstant(nestMember);
+        stringBuilder.append(END_PARAMETERS);
+        text.add(stringBuilder.toString());
+    }
+
+    @Override
+    public void visitPermittedSubclass(final String permittedSubclass) {
+        stringBuilder.setLength(0);
+        stringBuilder.append("classWriter.visitPermittedSubclass(");
+        appendConstant(permittedSubclass);
+        stringBuilder.append(END_PARAMETERS);
+        text.add(stringBuilder.toString());
+    }
+
+    @Override
+    public void visitInnerClass(
+            final String name, final String outerName, final String innerName, final int access) {
+        stringBuilder.setLength(0);
+        stringBuilder.append("classWriter.visitInnerClass(");
+        appendConstant(name);
+        stringBuilder.append(", ");
+        appendConstant(outerName);
+        stringBuilder.append(", ");
+        appendConstant(innerName);
+        stringBuilder.append(", ");
+        appendAccessFlags(access | ACCESS_INNER);
+        stringBuilder.append(END_PARAMETERS);
+        text.add(stringBuilder.toString());
+    }
+
+    @Override
+    public ASMifier visitRecordComponent(
+            final String name, final String descriptor, final String signature) {
+        stringBuilder.setLength(0);
+        stringBuilder.append("{\n");
+        stringBuilder.append("recordComponentVisitor = classWriter.visitRecordComponent(");
+        appendConstant(name);
+        stringBuilder.append(", ");
+        appendConstant(descriptor);
+        stringBuilder.append(", ");
+        appendConstant(signature);
+        stringBuilder.append(");\n");
+        text.add(stringBuilder.toString());
+        ASMifier asmifier = createASMifier("recordComponentVisitor", 0);
+        text.add(asmifier.getText());
+        text.add("}\n");
+        return asmifier;
+    }
+
+    @Override
+    public ASMifier visitField(
+            final int access,
+            final String name,
+            final String descriptor,
+            final String signature,
+            final Object value) {
+        stringBuilder.setLength(0);
+        stringBuilder.append("{\n");
+        stringBuilder.append("fieldVisitor = classWriter.visitField(");
+        appendAccessFlags(access | ACCESS_FIELD);
+        stringBuilder.append(", ");
+        appendConstant(name);
+        stringBuilder.append(", ");
+        appendConstant(descriptor);
+        stringBuilder.append(", ");
+        appendConstant(signature);
+        stringBuilder.append(", ");
+        appendConstant(value);
+        stringBuilder.append(");\n");
+        text.add(stringBuilder.toString());
+        ASMifier asmifier = createASMifier("fieldVisitor", 0);
+        text.add(asmifier.getText());
+        text.add("}\n");
+        return asmifier;
+    }
+
+    @Override
+    public ASMifier visitMethod(
+            final int access,
+            final String name,
+            final String descriptor,
+            final String signature,
+            final String[] exceptions) {
+        stringBuilder.setLength(0);
+        stringBuilder.append("{\n");
+        stringBuilder.append("methodVisitor = classWriter.visitMethod(");
+        appendAccessFlags(access);
+        stringBuilder.append(", ");
+        appendConstant(name);
+        stringBuilder.append(", ");
+        appendConstant(descriptor);
+        stringBuilder.append(", ");
+        appendConstant(signature);
+        stringBuilder.append(", ");
+        if (exceptions != null && exceptions.length > 0) {
+            stringBuilder.append("new String[] {");
+            for (int i = 0; i < exceptions.length; ++i) {
+                stringBuilder.append(i == 0 ? " " : ", ");
+                appendConstant(exceptions[i]);
+            }
+            stringBuilder.append(" }");
+        } else {
+            stringBuilder.append("null");
+        }
+        stringBuilder.append(");\n");
+        text.add(stringBuilder.toString());
+        ASMifier asmifier = createASMifier("methodVisitor", 0);
+        text.add(asmifier.getText());
+        text.add("}\n");
+        return asmifier;
+    }
+
+    @Override
+    public void visitClassEnd() {
+        text.add("classWriter.visitEnd();\n\n");
+        text.add("return classWriter.toByteArray();\n");
+        text.add("}\n");
+        text.add("}\n");
+    }
+
+    // -----------------------------------------------------------------------------------------------
+    // Modules
+    // -----------------------------------------------------------------------------------------------
+
+    @Override
+    public void visitMainClass(final String mainClass) {
+        stringBuilder.setLength(0);
+        stringBuilder.append("moduleVisitor.visitMainClass(");
+        appendConstant(mainClass);
+        stringBuilder.append(");\n");
+        text.add(stringBuilder.toString());
+    }
+
+    @Override
+    public void visitPackage(final String packaze) {
+        stringBuilder.setLength(0);
+        stringBuilder.append("moduleVisitor.visitPackage(");
+        appendConstant(packaze);
+        stringBuilder.append(");\n");
+        text.add(stringBuilder.toString());
+    }
+
+    @Override
+    public void visitRequire(final String module, final int access, final String version) {
+        stringBuilder.setLength(0);
+        stringBuilder.append("moduleVisitor.visitRequire(");
+        appendConstant(module);
+        stringBuilder.append(", ");
+        appendAccessFlags(access | ACCESS_MODULE);
+        stringBuilder.append(", ");
+        appendConstant(version);
+        stringBuilder.append(");\n");
+        text.add(stringBuilder.toString());
+    }
+
+    @Override
+    public void visitExport(final String packaze, final int access, final String... modules) {
+        visitExportOrOpen("moduleVisitor.visitExport(", packaze, access, modules);
+    }
+
+    @Override
+    public void visitOpen(final String packaze, final int access, final String... modules) {
+        visitExportOrOpen("moduleVisitor.visitOpen(", packaze, access, modules);
+    }
+
+    private void visitExportOrOpen(
+            final String visitMethod, final String packaze, final int access, final String... modules) {
+        stringBuilder.setLength(0);
+        stringBuilder.append(visitMethod);
+        appendConstant(packaze);
+        stringBuilder.append(", ");
+        appendAccessFlags(access | ACCESS_MODULE);
+        if (modules != null && modules.length > 0) {
+            stringBuilder.append(", new String[] {");
+            for (int i = 0; i < modules.length; ++i) {
+                stringBuilder.append(i == 0 ? " " : ", ");
+                appendConstant(modules[i]);
+            }
+            stringBuilder.append(" }");
+        }
+        stringBuilder.append(");\n");
+        text.add(stringBuilder.toString());
+    }
+
+    @Override
+    public void visitUse(final String service) {
+        stringBuilder.setLength(0);
+        stringBuilder.append("moduleVisitor.visitUse(");
+        appendConstant(service);
+        stringBuilder.append(");\n");
+        text.add(stringBuilder.toString());
+    }
+
+    @Override
+    public void visitProvide(final String service, final String... providers) {
+        stringBuilder.setLength(0);
+        stringBuilder.append("moduleVisitor.visitProvide(");
+        appendConstant(service);
+        stringBuilder.append(",  new String[] {");
+        for (int i = 0; i < providers.length; ++i) {
+            stringBuilder.append(i == 0 ? " " : ", ");
+            appendConstant(providers[i]);
+        }
+        stringBuilder.append(END_ARRAY);
+        text.add(stringBuilder.toString());
+    }
+
+    @Override
+    public void visitModuleEnd() {
+        text.add("moduleVisitor.visitEnd();\n");
+    }
+
+    // -----------------------------------------------------------------------------------------------
+    // Annotations
+    // -----------------------------------------------------------------------------------------------
+
+    // DontCheck(OverloadMethodsDeclarationOrder): overloads are semantically different.
+    @Override
+    public void visit(final String name, final Object value) {
+        stringBuilder.setLength(0);
+        stringBuilder.append(ANNOTATION_VISITOR).append(id).append(".visit(");
+        appendConstant(name);
+        stringBuilder.append(", ");
+        appendConstant(value);
+        stringBuilder.append(");\n");
+        text.add(stringBuilder.toString());
+    }
+
+    @Override
+    public void visitEnum(final String name, final String descriptor, final String value) {
+        stringBuilder.setLength(0);
+        stringBuilder.append(ANNOTATION_VISITOR).append(id).append(".visitEnum(");
+        appendConstant(name);
+        stringBuilder.append(", ");
+        appendConstant(descriptor);
+        stringBuilder.append(", ");
+        appendConstant(value);
+        stringBuilder.append(");\n");
+        text.add(stringBuilder.toString());
+    }
+
+    @Override
+    public ASMifier visitAnnotation(final String name, final String descriptor) {
+        stringBuilder.setLength(0);
+        stringBuilder
+                .append("{\n")
+                .append("AnnotationVisitor annotationVisitor")
+                .append(id + 1)
+                .append(" = annotationVisitor");
+        stringBuilder.append(id).append(".visitAnnotation(");
+        appendConstant(name);
+        stringBuilder.append(", ");
+        appendConstant(descriptor);
+        stringBuilder.append(");\n");
+        text.add(stringBuilder.toString());
+        ASMifier asmifier = createASMifier(ANNOTATION_VISITOR, id + 1);
+        text.add(asmifier.getText());
+        text.add("}\n");
+        return asmifier;
+    }
+
+    @Override
+    public ASMifier visitArray(final String name) {
+        stringBuilder.setLength(0);
+        stringBuilder.append("{\n");
+        stringBuilder
+                .append("AnnotationVisitor annotationVisitor")
+                .append(id + 1)
+                .append(" = annotationVisitor");
+        stringBuilder.append(id).append(".visitArray(");
+        appendConstant(name);
+        stringBuilder.append(");\n");
+        text.add(stringBuilder.toString());
+        ASMifier asmifier = createASMifier(ANNOTATION_VISITOR, id + 1);
+        text.add(asmifier.getText());
+        text.add("}\n");
+        return asmifier;
+    }
+
+    @Override
+    public void visitAnnotationEnd() {
+        stringBuilder.setLength(0);
+        stringBuilder.append(ANNOTATION_VISITOR).append(id).append(VISIT_END);
+        text.add(stringBuilder.toString());
+    }
+
+    // -----------------------------------------------------------------------------------------------
+    // Record components
+    // -----------------------------------------------------------------------------------------------
+
+    @Override
+    public ASMifier visitRecordComponentAnnotation(final String descriptor, final boolean visible) {
+        return visitAnnotation(descriptor, visible);
+    }
+
+    @Override
+    public ASMifier visitRecordComponentTypeAnnotation(
+            final int typeRef, final TypePath typePath, final String descriptor, final boolean visible) {
+        return visitTypeAnnotation(typeRef, typePath, descriptor, visible);
+    }
+
+    @Override
+    public void visitRecordComponentAttribute(final Attribute attribute) {
+        visitAttribute(attribute);
+    }
+
+    @Override
+    public void visitRecordComponentEnd() {
+        visitMemberEnd();
+    }
+
+    // -----------------------------------------------------------------------------------------------
+    // Fields
+    // -----------------------------------------------------------------------------------------------
+
+    @Override
+    public ASMifier visitFieldAnnotation(final String descriptor, final boolean visible) {
+        return visitAnnotation(descriptor, visible);
+    }
+
+    @Override
+    public ASMifier visitFieldTypeAnnotation(
+            final int typeRef, final TypePath typePath, final String descriptor, final boolean visible) {
+        return visitTypeAnnotation(typeRef, typePath, descriptor, visible);
+    }
+
+    @Override
+    public void visitFieldAttribute(final Attribute attribute) {
+        visitAttribute(attribute);
+    }
+
+    @Override
+    public void visitFieldEnd() {
+        visitMemberEnd();
+    }
+
+    // -----------------------------------------------------------------------------------------------
+    // Methods
+    // -----------------------------------------------------------------------------------------------
+
+    @Override
+    public void visitParameter(final String parameterName, final int access) {
+        stringBuilder.setLength(0);
+        stringBuilder.append(name).append(".visitParameter(");
+        appendString(stringBuilder, parameterName);
+        stringBuilder.append(", ");
+        appendAccessFlags(access);
+        text.add(stringBuilder.append(");\n").toString());
+    }
+
+    @Override
+    public ASMifier visitAnnotationDefault() {
+        stringBuilder.setLength(0);
+        stringBuilder
+                .append("{\n")
+                .append(ANNOTATION_VISITOR0)
+                .append(name)
+                .append(".visitAnnotationDefault();\n");
+        text.add(stringBuilder.toString());
+        ASMifier asmifier = createASMifier(ANNOTATION_VISITOR, 0);
+        text.add(asmifier.getText());
+        text.add("}\n");
+        return asmifier;
+    }
+
+    @Override
+    public ASMifier visitMethodAnnotation(final String descriptor, final boolean visible) {
+        return visitAnnotation(descriptor, visible);
+    }
+
+    @Override
+    public ASMifier visitMethodTypeAnnotation(
+            final int typeRef, final TypePath typePath, final String descriptor, final boolean visible) {
+        return visitTypeAnnotation(typeRef, typePath, descriptor, visible);
+    }
+
+    @Override
+    public ASMifier visitAnnotableParameterCount(final int parameterCount, final boolean visible) {
+        stringBuilder.setLength(0);
+        stringBuilder
+                .append(name)
+                .append(".visitAnnotableParameterCount(")
+                .append(parameterCount)
+                .append(", ")
+                .append(visible)
+                .append(");\n");
+        text.add(stringBuilder.toString());
+        return this;
+    }
+
+    @Override
+    public ASMifier visitParameterAnnotation(
+            final int parameter, final String descriptor, final boolean visible) {
+        stringBuilder.setLength(0);
+        stringBuilder
+                .append("{\n")
+                .append(ANNOTATION_VISITOR0)
+                .append(name)
+                .append(".visitParameterAnnotation(")
+                .append(parameter)
+                .append(", ");
+        appendConstant(descriptor);
+        stringBuilder.append(", ").append(visible).append(");\n");
+        text.add(stringBuilder.toString());
+        ASMifier asmifier = createASMifier(ANNOTATION_VISITOR, 0);
+        text.add(asmifier.getText());
+        text.add("}\n");
+        return asmifier;
+    }
+
+    @Override
+    public void visitMethodAttribute(final Attribute attribute) {
+        visitAttribute(attribute);
+    }
+
+    @Override
+    public void visitCode() {
+        text.add(name + ".visitCode();\n");
+    }
+
+    @Override
+    public void visitFrame(
+            final int type,
+            final int numLocal,
+            final Object[] local,
+            final int numStack,
+            final Object[] stack) {
+        stringBuilder.setLength(0);
+        switch (type) {
+            case Opcodes.F_NEW:
+            case Opcodes.F_FULL:
+                declareFrameTypes(numLocal, local);
+                declareFrameTypes(numStack, stack);
+                if (type == Opcodes.F_NEW) {
+                    stringBuilder.append(name).append(".visitFrame(Opcodes.F_NEW, ");
+                } else {
+                    stringBuilder.append(name).append(".visitFrame(Opcodes.F_FULL, ");
+                }
+                stringBuilder.append(numLocal).append(NEW_OBJECT_ARRAY);
+                appendFrameTypes(numLocal, local);
+                stringBuilder.append("}, ").append(numStack).append(NEW_OBJECT_ARRAY);
+                appendFrameTypes(numStack, stack);
+                stringBuilder.append('}');
+                break;
+            case Opcodes.F_APPEND:
+                declareFrameTypes(numLocal, local);
+                stringBuilder
+                        .append(name)
+                        .append(".visitFrame(Opcodes.F_APPEND,")
+                        .append(numLocal)
+                        .append(NEW_OBJECT_ARRAY);
+                appendFrameTypes(numLocal, local);
+                stringBuilder.append("}, 0, null");
+                break;
+            case Opcodes.F_CHOP:
+                stringBuilder
+                        .append(name)
+                        .append(".visitFrame(Opcodes.F_CHOP,")
+                        .append(numLocal)
+                        .append(", null, 0, null");
+                break;
+            case Opcodes.F_SAME:
+                stringBuilder.append(name).append(".visitFrame(Opcodes.F_SAME, 0, null, 0, null");
+                break;
+            case Opcodes.F_SAME1:
+                declareFrameTypes(1, stack);
+                stringBuilder
+                        .append(name)
+                        .append(".visitFrame(Opcodes.F_SAME1, 0, null, 1, new Object[] {");
+                appendFrameTypes(1, stack);
+                stringBuilder.append('}');
+                break;
+            default:
+                throw new IllegalArgumentException();
+        }
+        stringBuilder.append(");\n");
+        text.add(stringBuilder.toString());
+    }
+
+    @Override
+    public void visitInsn(final int opcode) {
+        stringBuilder.setLength(0);
+        stringBuilder.append(name).append(".visitInsn(").append(OPCODES[opcode]).append(");\n");
+        text.add(stringBuilder.toString());
+    }
+
+    @Override
+    public void visitIntInsn(final int opcode, final int operand) {
+        stringBuilder.setLength(0);
+        stringBuilder
+                .append(name)
+                .append(".visitIntInsn(")
+                .append(OPCODES[opcode])
+                .append(", ")
+                .append(opcode == Opcodes.NEWARRAY ? TYPES[operand] : Integer.toString(operand))
+                .append(");\n");
+        text.add(stringBuilder.toString());
+    }
+
+    @Override
+    public void visitVarInsn(final int opcode, final int varIndex) {
+        stringBuilder.setLength(0);
+        stringBuilder
+                .append(name)
+                .append(".visitVarInsn(")
+                .append(OPCODES[opcode])
+                .append(", ")
+                .append(varIndex)
+                .append(");\n");
+        text.add(stringBuilder.toString());
+    }
+
+    @Override
+    public void visitTypeInsn(final int opcode, final String type) {
+        stringBuilder.setLength(0);
+        stringBuilder.append(name).append(".visitTypeInsn(").append(OPCODES[opcode]).append(", ");
+        appendConstant(type);
+        stringBuilder.append(");\n");
+        text.add(stringBuilder.toString());
+    }
+
+    @Override
+    public void visitFieldInsn(
+            final int opcode, final String owner, final String name, final String descriptor) {
+        stringBuilder.setLength(0);
+        stringBuilder.append(this.name).append(".visitFieldInsn(").append(OPCODES[opcode]).append(", ");
+        appendConstant(owner);
+        stringBuilder.append(", ");
+        appendConstant(name);
+        stringBuilder.append(", ");
+        appendConstant(descriptor);
+        stringBuilder.append(");\n");
+        text.add(stringBuilder.toString());
+    }
+
+    @Override
+    public void visitMethodInsn(
+            final int opcode,
+            final String owner,
+            final String name,
+            final String descriptor,
+            final boolean isInterface) {
+        stringBuilder.setLength(0);
+        stringBuilder
+                .append(this.name)
+                .append(".visitMethodInsn(")
+                .append(OPCODES[opcode])
+                .append(", ");
+        appendConstant(owner);
+        stringBuilder.append(", ");
+        appendConstant(name);
+        stringBuilder.append(", ");
+        appendConstant(descriptor);
+        stringBuilder.append(", ");
+        stringBuilder.append(isInterface ? "true" : "false");
+        stringBuilder.append(");\n");
+        text.add(stringBuilder.toString());
+    }
+
+    @Override
+    public void visitInvokeDynamicInsn(
+            final String name,
+            final String descriptor,
+            final Handle bootstrapMethodHandle,
+            final Object... bootstrapMethodArguments) {
+        stringBuilder.setLength(0);
+        stringBuilder.append(this.name).append(".visitInvokeDynamicInsn(");
+        appendConstant(name);
+        stringBuilder.append(", ");
+        appendConstant(descriptor);
+        stringBuilder.append(", ");
+        appendConstant(bootstrapMethodHandle);
+        stringBuilder.append(", new Object[]{");
+        for (int i = 0; i < bootstrapMethodArguments.length; ++i) {
+            appendConstant(bootstrapMethodArguments[i]);
+            if (i != bootstrapMethodArguments.length - 1) {
+                stringBuilder.append(", ");
+            }
+        }
+        stringBuilder.append("});\n");
+        text.add(stringBuilder.toString());
+    }
+
+    @Override
+    public void visitJumpInsn(final int opcode, final Label label) {
+        stringBuilder.setLength(0);
+        declareLabel(label);
+        stringBuilder.append(name).append(".visitJumpInsn(").append(OPCODES[opcode]).append(", ");
+        appendLabel(label);
+        stringBuilder.append(");\n");
+        text.add(stringBuilder.toString());
+    }
+
+    @Override
+    public void visitLabel(final Label label) {
+        stringBuilder.setLength(0);
+        declareLabel(label);
+        stringBuilder.append(name).append(".visitLabel(");
+        appendLabel(label);
+        stringBuilder.append(");\n");
+        text.add(stringBuilder.toString());
+    }
+
+    @Override
+    public void visitLdcInsn(final Object value) {
+        stringBuilder.setLength(0);
+        stringBuilder.append(name).append(".visitLdcInsn(");
+        appendConstant(value);
+        stringBuilder.append(");\n");
+        text.add(stringBuilder.toString());
+    }
+
+    @Override
+    public void visitIincInsn(final int varIndex, final int increment) {
+        stringBuilder.setLength(0);
+        stringBuilder
+                .append(name)
+                .append(".visitIincInsn(")
+                .append(varIndex)
+                .append(", ")
+                .append(increment)
+                .append(");\n");
+        text.add(stringBuilder.toString());
+    }
+
+    @Override
+    public void visitTableSwitchInsn(
+            final int min, final int max, final Label dflt, final Label... labels) {
+        stringBuilder.setLength(0);
+        for (Label label : labels) {
+            declareLabel(label);
+        }
+        declareLabel(dflt);
+
+        stringBuilder
+                .append(name)
+                .append(".visitTableSwitchInsn(")
+                .append(min)
+                .append(", ")
+                .append(max)
+                .append(", ");
+        appendLabel(dflt);
+        stringBuilder.append(", new Label[] {");
+        for (int i = 0; i < labels.length; ++i) {
+            stringBuilder.append(i == 0 ? " " : ", ");
+            appendLabel(labels[i]);
+        }
+        stringBuilder.append(END_ARRAY);
+        text.add(stringBuilder.toString());
+    }
+
+    @Override
+    public void visitLookupSwitchInsn(final Label dflt, final int[] keys, final Label[] labels) {
+        stringBuilder.setLength(0);
+        for (Label label : labels) {
+            declareLabel(label);
+        }
+        declareLabel(dflt);
+
+        stringBuilder.append(name).append(".visitLookupSwitchInsn(");
+        appendLabel(dflt);
+        stringBuilder.append(", new int[] {");
+        for (int i = 0; i < keys.length; ++i) {
+            stringBuilder.append(i == 0 ? " " : ", ").append(keys[i]);
+        }
+        stringBuilder.append(" }, new Label[] {");
+        for (int i = 0; i < labels.length; ++i) {
+            stringBuilder.append(i == 0 ? " " : ", ");
+            appendLabel(labels[i]);
+        }
+        stringBuilder.append(END_ARRAY);
+        text.add(stringBuilder.toString());
+    }
+
+    @Override
+    public void visitMultiANewArrayInsn(final String descriptor, final int numDimensions) {
+        stringBuilder.setLength(0);
+        stringBuilder.append(name).append(".visitMultiANewArrayInsn(");
+        appendConstant(descriptor);
+        stringBuilder.append(", ").append(numDimensions).append(");\n");
+        text.add(stringBuilder.toString());
+    }
+
+    @Override
+    public ASMifier visitInsnAnnotation(
+            final int typeRef, final TypePath typePath, final String descriptor, final boolean visible) {
+        return visitTypeAnnotation("visitInsnAnnotation", typeRef, typePath, descriptor, visible);
+    }
+
+    @Override
+    public void visitTryCatchBlock(
+            final Label start, final Label end, final Label handler, final String type) {
+        stringBuilder.setLength(0);
+        declareLabel(start);
+        declareLabel(end);
+        declareLabel(handler);
+        stringBuilder.append(name).append(".visitTryCatchBlock(");
+        appendLabel(start);
+        stringBuilder.append(", ");
+        appendLabel(end);
+        stringBuilder.append(", ");
+        appendLabel(handler);
+        stringBuilder.append(", ");
+        appendConstant(type);
+        stringBuilder.append(");\n");
+        text.add(stringBuilder.toString());
+    }
+
+    @Override
+    public ASMifier visitTryCatchAnnotation(
+            final int typeRef, final TypePath typePath, final String descriptor, final boolean visible) {
+        return visitTypeAnnotation("visitTryCatchAnnotation", typeRef, typePath, descriptor, visible);
+    }
+
+    @Override
+    public void visitLocalVariable(
+            final String name,
+            final String descriptor,
+            final String signature,
+            final Label start,
+            final Label end,
+            final int index) {
+        stringBuilder.setLength(0);
+        stringBuilder.append(this.name).append(".visitLocalVariable(");
+        appendConstant(name);
+        stringBuilder.append(", ");
+        appendConstant(descriptor);
+        stringBuilder.append(", ");
+        appendConstant(signature);
+        stringBuilder.append(", ");
+        appendLabel(start);
+        stringBuilder.append(", ");
+        appendLabel(end);
+        stringBuilder.append(", ").append(index).append(");\n");
+        text.add(stringBuilder.toString());
+    }
+
+    @Override
+    public Printer visitLocalVariableAnnotation(
+            final int typeRef,
+            final TypePath typePath,
+            final Label[] start,
+            final Label[] end,
+            final int[] index,
+            final String descriptor,
+            final boolean visible) {
+        stringBuilder.setLength(0);
+        stringBuilder
+                .append("{\n")
+                .append(ANNOTATION_VISITOR0)
+                .append(name)
+                .append(".visitLocalVariableAnnotation(")
+                .append(typeRef);
+        if (typePath == null) {
+            stringBuilder.append(", null, ");
+        } else {
+            stringBuilder.append(", TypePath.fromString(\"").append(typePath).append("\"), ");
+        }
+        stringBuilder.append("new Label[] {");
+        for (int i = 0; i < start.length; ++i) {
+            stringBuilder.append(i == 0 ? " " : ", ");
+            appendLabel(start[i]);
+        }
+        stringBuilder.append(" }, new Label[] {");
+        for (int i = 0; i < end.length; ++i) {
+            stringBuilder.append(i == 0 ? " " : ", ");
+            appendLabel(end[i]);
+        }
+        stringBuilder.append(" }, new int[] {");
+        for (int i = 0; i < index.length; ++i) {
+            stringBuilder.append(i == 0 ? " " : ", ").append(index[i]);
+        }
+        stringBuilder.append(" }, ");
+        appendConstant(descriptor);
+        stringBuilder.append(", ").append(visible).append(");\n");
+        text.add(stringBuilder.toString());
+        ASMifier asmifier = createASMifier(ANNOTATION_VISITOR, 0);
+        text.add(asmifier.getText());
+        text.add("}\n");
+        return asmifier;
+    }
+
+    @Override
+    public void visitLineNumber(final int line, final Label start) {
+        stringBuilder.setLength(0);
+        stringBuilder.append(name).append(".visitLineNumber(").append(line).append(", ");
+        appendLabel(start);
+        stringBuilder.append(");\n");
+        text.add(stringBuilder.toString());
+    }
+
+    @Override
+    public void visitMaxs(final int maxStack, final int maxLocals) {
+        stringBuilder.setLength(0);
+        stringBuilder
+                .append(name)
+                .append(".visitMaxs(")
+                .append(maxStack)
+                .append(", ")
+                .append(maxLocals)
+                .append(");\n");
+        text.add(stringBuilder.toString());
+    }
+
+    @Override
+    public void visitMethodEnd() {
+        visitMemberEnd();
+    }
+
+    // -----------------------------------------------------------------------------------------------
+    // Common methods
+    // -----------------------------------------------------------------------------------------------
+
+    /**
+      * Visits a class, field or method annotation.
+      *
+      * @param descriptor the class descriptor of the annotation class.
+      * @param visible {@literal true} if the annotation is visible at runtime.
+      * @return a new {@link ASMifier} to visit the annotation values.
+      */
+    // DontCheck(OverloadMethodsDeclarationOrder): overloads are semantically different.
+    public ASMifier visitAnnotation(final String descriptor, final boolean visible) {
+        stringBuilder.setLength(0);
+        stringBuilder
+                .append("{\n")
+                .append(ANNOTATION_VISITOR0)
+                .append(name)
+                .append(".visitAnnotation(");
+        appendConstant(descriptor);
+        stringBuilder.append(", ").append(visible).append(");\n");
+        text.add(stringBuilder.toString());
+        ASMifier asmifier = createASMifier(ANNOTATION_VISITOR, 0);
+        text.add(asmifier.getText());
+        text.add("}\n");
+        return asmifier;
+    }
+
+    /**
+      * Visits a class, field or method type annotation.
+      *
+      * @param typeRef a reference to the annotated type. The sort of this type reference must be
+      *     {@link jdk.internal.org.objectweb.asm.TypeReference#FIELD}. See {@link jdk.internal.org.objectweb.asm.TypeReference}.
+      * @param typePath the path to the annotated type argument, wildcard bound, array element type, or
+      *     static inner type within 'typeRef'. May be {@literal null} if the annotation targets
+      *     'typeRef' as a whole.
+      * @param descriptor the class descriptor of the annotation class.
+      * @param visible {@literal true} if the annotation is visible at runtime.
+      * @return a new {@link ASMifier} to visit the annotation values.
+      */
+    public ASMifier visitTypeAnnotation(
+            final int typeRef, final TypePath typePath, final String descriptor, final boolean visible) {
+        return visitTypeAnnotation("visitTypeAnnotation", typeRef, typePath, descriptor, visible);
+    }
+
+    /**
+      * Visits a class, field, method, instruction or try catch block type annotation.
+      *
+      * @param method the name of the visit method for this type of annotation.
+      * @param typeRef a reference to the annotated type. The sort of this type reference must be
+      *     {@link jdk.internal.org.objectweb.asm.TypeReference#FIELD}. See {@link jdk.internal.org.objectweb.asm.TypeReference}.
+      * @param typePath the path to the annotated type argument, wildcard bound, array element type, or
+      *     static inner type within 'typeRef'. May be {@literal null} if the annotation targets
+      *     'typeRef' as a whole.
+      * @param descriptor the class descriptor of the annotation class.
+      * @param visible {@literal true} if the annotation is visible at runtime.
+      * @return a new {@link ASMifier} to visit the annotation values.
+      */
+    public ASMifier visitTypeAnnotation(
+            final String method,
+            final int typeRef,
+            final TypePath typePath,
+            final String descriptor,
+            final boolean visible) {
+        stringBuilder.setLength(0);
+        stringBuilder
+                .append("{\n")
+                .append(ANNOTATION_VISITOR0)
+                .append(name)
+                .append('.')
+                .append(method)
+                .append('(')
+                .append(typeRef);
+        if (typePath == null) {
+            stringBuilder.append(", null, ");
+        } else {
+            stringBuilder.append(", TypePath.fromString(\"").append(typePath).append("\"), ");
+        }
+        appendConstant(descriptor);
+        stringBuilder.append(", ").append(visible).append(");\n");
+        text.add(stringBuilder.toString());
+        ASMifier asmifier = createASMifier(ANNOTATION_VISITOR, 0);
+        text.add(asmifier.getText());
+        text.add("}\n");
+        return asmifier;
+    }
+
+    /**
+      * Visit a class, field or method attribute.
+      *
+      * @param attribute an attribute.
+      */
+    public void visitAttribute(final Attribute attribute) {
+        stringBuilder.setLength(0);
+        stringBuilder.append("// ATTRIBUTE ").append(attribute.type).append('\n');
+        if (attribute instanceof ASMifierSupport) {
+            if (labelNames == null) {
+                labelNames = new HashMap<>();
+            }
+            stringBuilder.append("{\n");
+            ((ASMifierSupport) attribute).asmify(stringBuilder, "attribute", labelNames);
+            stringBuilder.append(name).append(".visitAttribute(attribute);\n");
+            stringBuilder.append("}\n");
+        }
+        text.add(stringBuilder.toString());
+    }
+
+    /** Visits the end of a field, record component or method. */
+    private void visitMemberEnd() {
+        stringBuilder.setLength(0);
+        stringBuilder.append(name).append(VISIT_END);
+        text.add(stringBuilder.toString());
+    }
+
+    // -----------------------------------------------------------------------------------------------
+    // Utility methods
+    // -----------------------------------------------------------------------------------------------
+
+    /**
+      * Constructs a new {@link ASMifier}.
+      *
+      * @param visitorVariableName the name of the visitor variable in the produced code.
+      * @param annotationVisitorId identifier of the annotation visitor variable in the produced code.
+      * @return a new {@link ASMifier}.
+      */
+    // DontCheck(AbbreviationAsWordInName): can't be renamed (for backward binary compatibility).
+    protected ASMifier createASMifier(
+            final String visitorVariableName, final int annotationVisitorId) {
+        return new ASMifier(api, visitorVariableName, annotationVisitorId);
+    }
+
+    /**
+      * Appends a string representation of the given access flags to {@link #stringBuilder}.
+      *
+      * @param accessFlags some access flags.
+      */
+    private void appendAccessFlags(final int accessFlags) {
+        boolean isEmpty = true;
+        if ((accessFlags & Opcodes.ACC_PUBLIC) != 0) {
+            stringBuilder.append("ACC_PUBLIC");
+            isEmpty = false;
+        }
+        if ((accessFlags & Opcodes.ACC_PRIVATE) != 0) {
+            stringBuilder.append("ACC_PRIVATE");
+            isEmpty = false;
+        }
+        if ((accessFlags & Opcodes.ACC_PROTECTED) != 0) {
+            stringBuilder.append("ACC_PROTECTED");
+            isEmpty = false;
+        }
+        if ((accessFlags & Opcodes.ACC_FINAL) != 0) {
+            if (!isEmpty) {
+                stringBuilder.append(" | ");
+            }
+            stringBuilder.append("ACC_FINAL");
+            isEmpty = false;
+        }
+        if ((accessFlags & Opcodes.ACC_STATIC) != 0) {
+            if (!isEmpty) {
+                stringBuilder.append(" | ");
+            }
+            stringBuilder.append("ACC_STATIC");
+            isEmpty = false;
+        }
+        if ((accessFlags & (Opcodes.ACC_SYNCHRONIZED | Opcodes.ACC_SUPER | Opcodes.ACC_TRANSITIVE))
+                != 0) {
+            if (!isEmpty) {
+                stringBuilder.append(" | ");
+            }
+            if ((accessFlags & ACCESS_CLASS) == 0) {
+                if ((accessFlags & ACCESS_MODULE) == 0) {
+                    stringBuilder.append("ACC_SYNCHRONIZED");
+                } else {
+                    stringBuilder.append("ACC_TRANSITIVE");
+                }
+            } else {
+                stringBuilder.append("ACC_SUPER");
+            }
+            isEmpty = false;
+        }
+        if ((accessFlags & (Opcodes.ACC_VOLATILE | Opcodes.ACC_BRIDGE | Opcodes.ACC_STATIC_PHASE))
+                != 0) {
+            if (!isEmpty) {
+                stringBuilder.append(" | ");
+            }
+            if ((accessFlags & ACCESS_FIELD) == 0) {
+                if ((accessFlags & ACCESS_MODULE) == 0) {
+                    stringBuilder.append("ACC_BRIDGE");
+                } else {
+                    stringBuilder.append("ACC_STATIC_PHASE");
+                }
+            } else {
+                stringBuilder.append("ACC_VOLATILE");
+            }
+            isEmpty = false;
+        }
+        if ((accessFlags & Opcodes.ACC_VARARGS) != 0
+                && (accessFlags & (ACCESS_CLASS | ACCESS_FIELD)) == 0) {
+            if (!isEmpty) {
+                stringBuilder.append(" | ");
+            }
+            stringBuilder.append("ACC_VARARGS");
+            isEmpty = false;
+        }
+        if ((accessFlags & Opcodes.ACC_TRANSIENT) != 0 && (accessFlags & ACCESS_FIELD) != 0) {
+            if (!isEmpty) {
+                stringBuilder.append(" | ");
+            }
+            stringBuilder.append("ACC_TRANSIENT");
+            isEmpty = false;
+        }
+        if ((accessFlags & Opcodes.ACC_NATIVE) != 0
+                && (accessFlags & (ACCESS_CLASS | ACCESS_FIELD)) == 0) {
+            if (!isEmpty) {
+                stringBuilder.append(" | ");
+            }
+            stringBuilder.append("ACC_NATIVE");
+            isEmpty = false;
+        }
+        if ((accessFlags & Opcodes.ACC_ENUM) != 0
+                && (accessFlags & (ACCESS_CLASS | ACCESS_FIELD | ACCESS_INNER)) != 0) {
+            if (!isEmpty) {
+                stringBuilder.append(" | ");
+            }
+            stringBuilder.append("ACC_ENUM");
+            isEmpty = false;
+        }
+        if ((accessFlags & Opcodes.ACC_ANNOTATION) != 0
+                && (accessFlags & (ACCESS_CLASS | ACCESS_INNER)) != 0) {
+            if (!isEmpty) {
+                stringBuilder.append(" | ");
+            }
+            stringBuilder.append("ACC_ANNOTATION");
+            isEmpty = false;
+        }
+        if ((accessFlags & Opcodes.ACC_ABSTRACT) != 0) {
+            if (!isEmpty) {
+                stringBuilder.append(" | ");
+            }
+            stringBuilder.append("ACC_ABSTRACT");
+            isEmpty = false;
+        }
+        if ((accessFlags & Opcodes.ACC_INTERFACE) != 0) {
+            if (!isEmpty) {
+                stringBuilder.append(" | ");
+            }
+            stringBuilder.append("ACC_INTERFACE");
+            isEmpty = false;
+        }
+        if ((accessFlags & Opcodes.ACC_STRICT) != 0) {
+            if (!isEmpty) {
+                stringBuilder.append(" | ");
+            }
+            stringBuilder.append("ACC_STRICT");
+            isEmpty = false;
+        }
+        if ((accessFlags & Opcodes.ACC_SYNTHETIC) != 0) {
+            if (!isEmpty) {
+                stringBuilder.append(" | ");
+            }
+            stringBuilder.append("ACC_SYNTHETIC");
+            isEmpty = false;
+        }
+        if ((accessFlags & Opcodes.ACC_DEPRECATED) != 0) {
+            if (!isEmpty) {
+                stringBuilder.append(" | ");
+            }
+            stringBuilder.append("ACC_DEPRECATED");
+            isEmpty = false;
+        }
+        if ((accessFlags & Opcodes.ACC_RECORD) != 0) {
+            if (!isEmpty) {
+                stringBuilder.append(" | ");
+            }
+            stringBuilder.append("ACC_RECORD");
+            isEmpty = false;
+        }
+        if ((accessFlags & (Opcodes.ACC_MANDATED | Opcodes.ACC_MODULE)) != 0) {
+            if (!isEmpty) {
+                stringBuilder.append(" | ");
+            }
+            if ((accessFlags & ACCESS_CLASS) == 0) {
+                stringBuilder.append("ACC_MANDATED");
+            } else {
+                stringBuilder.append("ACC_MODULE");
+            }
+            isEmpty = false;
+        }
+        if (isEmpty) {
+            stringBuilder.append('0');
+        }
+    }
+
+    /**
+      * Appends a string representation of the given constant to {@link #stringBuilder}.
+      *
+      * @param value a {@link String}, {@link Type}, {@link Handle}, {@link Byte}, {@link Short},
+      *     {@link Character}, {@link Integer}, {@link Float}, {@link Long} or {@link Double} object,
+      *     or an array of primitive values. May be {@literal null}.
+      */
+    protected void appendConstant(final Object value) {
+        if (value == null) {
+            stringBuilder.append("null");
+        } else if (value instanceof String) {
+            appendString(stringBuilder, (String) value);
+        } else if (value instanceof Type) {
+            stringBuilder.append("Type.getType(\"");
+            stringBuilder.append(((Type) value).getDescriptor());
+            stringBuilder.append("\")");
+        } else if (value instanceof Handle) {
+            stringBuilder.append("new Handle(");
+            Handle handle = (Handle) value;
+            stringBuilder.append("Opcodes.").append(HANDLE_TAG[handle.getTag()]).append(", \"");
+            stringBuilder.append(handle.getOwner()).append(COMMA);
+            stringBuilder.append(handle.getName()).append(COMMA);
+            stringBuilder.append(handle.getDesc()).append("\", ");
+            stringBuilder.append(handle.isInterface()).append(')');
+        } else if (value instanceof ConstantDynamic) {
+            stringBuilder.append("new ConstantDynamic(\"");
+            ConstantDynamic constantDynamic = (ConstantDynamic) value;
+            stringBuilder.append(constantDynamic.getName()).append(COMMA);
+            stringBuilder.append(constantDynamic.getDescriptor()).append("\", ");
+            appendConstant(constantDynamic.getBootstrapMethod());
+            stringBuilder.append(NEW_OBJECT_ARRAY);
+            int bootstrapMethodArgumentCount = constantDynamic.getBootstrapMethodArgumentCount();
+            for (int i = 0; i < bootstrapMethodArgumentCount; ++i) {
+                appendConstant(constantDynamic.getBootstrapMethodArgument(i));
+                if (i != bootstrapMethodArgumentCount - 1) {
+                    stringBuilder.append(", ");
+                }
+            }
+            stringBuilder.append("})");
+        } else if (value instanceof Byte) {
+            stringBuilder.append("new Byte((byte)").append(value).append(')');
+        } else if (value instanceof Boolean) {
+            stringBuilder.append(((Boolean) value).booleanValue() ? "Boolean.TRUE" : "Boolean.FALSE");
+        } else if (value instanceof Short) {
+            stringBuilder.append("new Short((short)").append(value).append(')');
+        } else if (value instanceof Character) {
+            stringBuilder
+                    .append("new Character((char)")
+                    .append((int) ((Character) value).charValue())
+                    .append(')');
+        } else if (value instanceof Integer) {
+            stringBuilder.append("new Integer(").append(value).append(')');
+        } else if (value instanceof Float) {
+            stringBuilder.append("new Float(\"").append(value).append("\")");
+        } else if (value instanceof Long) {
+            stringBuilder.append("new Long(").append(value).append("L)");
+        } else if (value instanceof Double) {
+            stringBuilder.append("new Double(\"").append(value).append("\")");
+        } else if (value instanceof byte[]) {
+            byte[] byteArray = (byte[]) value;
+            stringBuilder.append("new byte[] {");
+            for (int i = 0; i < byteArray.length; i++) {
+                stringBuilder.append(i == 0 ? "" : ",").append(byteArray[i]);
+            }
+            stringBuilder.append('}');
+        } else if (value instanceof boolean[]) {
+            boolean[] booleanArray = (boolean[]) value;
+            stringBuilder.append("new boolean[] {");
+            for (int i = 0; i < booleanArray.length; i++) {
+                stringBuilder.append(i == 0 ? "" : ",").append(booleanArray[i]);
+            }
+            stringBuilder.append('}');
+        } else if (value instanceof short[]) {
+            short[] shortArray = (short[]) value;
+            stringBuilder.append("new short[] {");
+            for (int i = 0; i < shortArray.length; i++) {
+                stringBuilder.append(i == 0 ? "" : ",").append("(short)").append(shortArray[i]);
+            }
+            stringBuilder.append('}');
+        } else if (value instanceof char[]) {
+            char[] charArray = (char[]) value;
+            stringBuilder.append("new char[] {");
+            for (int i = 0; i < charArray.length; i++) {
+                stringBuilder.append(i == 0 ? "" : ",").append("(char)").append((int) charArray[i]);
+            }
+            stringBuilder.append('}');
+        } else if (value instanceof int[]) {
+            int[] intArray = (int[]) value;
+            stringBuilder.append("new int[] {");
+            for (int i = 0; i < intArray.length; i++) {
+                stringBuilder.append(i == 0 ? "" : ",").append(intArray[i]);
+            }
+            stringBuilder.append('}');
+        } else if (value instanceof long[]) {
+            long[] longArray = (long[]) value;
+            stringBuilder.append("new long[] {");
+            for (int i = 0; i < longArray.length; i++) {
+                stringBuilder.append(i == 0 ? "" : ",").append(longArray[i]).append('L');
+            }
+            stringBuilder.append('}');
+        } else if (value instanceof float[]) {
+            float[] floatArray = (float[]) value;
+            stringBuilder.append("new float[] {");
+            for (int i = 0; i < floatArray.length; i++) {
+                stringBuilder.append(i == 0 ? "" : ",").append(floatArray[i]).append('f');
+            }
+            stringBuilder.append('}');
+        } else if (value instanceof double[]) {
+            double[] doubleArray = (double[]) value;
+            stringBuilder.append("new double[] {");
+            for (int i = 0; i < doubleArray.length; i++) {
+                stringBuilder.append(i == 0 ? "" : ",").append(doubleArray[i]).append('d');
+            }
+            stringBuilder.append('}');
+        }
+    }
+
+    /**
+      * Calls {@link #declareLabel} for each label in the given stack map frame types.
+      *
+      * @param numTypes the number of stack map frame types in 'frameTypes'.
+      * @param frameTypes an array of stack map frame types, in the format described in {@link
+      *     jdk.internal.org.objectweb.asm.MethodVisitor#visitFrame}.
+      */
+    private void declareFrameTypes(final int numTypes, final Object[] frameTypes) {
+        for (int i = 0; i < numTypes; ++i) {
+            if (frameTypes[i] instanceof Label) {
+                declareLabel((Label) frameTypes[i]);
+            }
+        }
+    }
+
+    /**
+      * Appends the given stack map frame types to {@link #stringBuilder}.
+      *
+      * @param numTypes the number of stack map frame types in 'frameTypes'.
+      * @param frameTypes an array of stack map frame types, in the format described in {@link
+      *     jdk.internal.org.objectweb.asm.MethodVisitor#visitFrame}.
+      */
+    private void appendFrameTypes(final int numTypes, final Object[] frameTypes) {
+        for (int i = 0; i < numTypes; ++i) {
+            if (i > 0) {
+                stringBuilder.append(", ");
+            }
+            if (frameTypes[i] instanceof String) {
+                appendConstant(frameTypes[i]);
+            } else if (frameTypes[i] instanceof Integer) {
+                stringBuilder.append(FRAME_TYPES.get(((Integer) frameTypes[i]).intValue()));
+            } else {
+                appendLabel((Label) frameTypes[i]);
+            }
+        }
+    }
+
+    /**
+      * Appends a declaration of the given label to {@link #stringBuilder}. This declaration is of the
+      * form "Label labelXXX = new Label();". Does nothing if the given label has already been
+      * declared.
+      *
+      * @param label a label.
+      */
+    protected void declareLabel(final Label label) {
+        if (labelNames == null) {
+            labelNames = new HashMap<>();
+        }
+        String labelName = labelNames.get(label);
+        if (labelName == null) {
+            labelName = "label" + labelNames.size();
+            labelNames.put(label, labelName);
+            stringBuilder.append("Label ").append(labelName).append(" = new Label();\n");
+        }
+    }
+
+    /**
+      * Appends the name of the given label to {@link #stringBuilder}. The given label <i>must</i>
+      * already have a name. One way to ensure this is to always call {@link #declareLabel} before
+      * calling this method.
+      *
+      * @param label a label.
+      */
+    protected void appendLabel(final Label label) {
+        stringBuilder.append(labelNames.get(label));
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/org/objectweb/asm/util/ASMifierSupport.class b/tests/test_data/std/jdk/internal/org/objectweb/asm/util/ASMifierSupport.class
new file mode 100644
index 0000000000000000000000000000000000000000..f9b8c015ec96726faa4e9229cef30080425c6b88
GIT binary patch
literal 370
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/org/objectweb/asm/util/ASMifierSupport.java b/tests/test_data/std/jdk/internal/org/objectweb/asm/util/ASMifierSupport.java
new file mode 100644
index 00000000..b5922813
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/org/objectweb/asm/util/ASMifierSupport.java
@@ -0,0 +1,83 @@
+/*
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/*
+ * This file is available under and governed by the GNU General Public
+ * License version 2 only, as published by the Free Software Foundation.
+ * However, the following notice accompanied the original version of this
+ * file:
+ *
+ * ASM: a very small and fast Java bytecode manipulation framework
+ * Copyright (c) 2000-2011 INRIA, France Telecom
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the copyright holders nor the names of its
+ *    contributors may be used to endorse or promote products derived from
+ *    this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+package jdk.internal.org.objectweb.asm.util;
+
+import java.util.Map;
+import jdk.internal.org.objectweb.asm.Label;
+
+/**
+ * An {@link jdk.internal.org.objectweb.asm.Attribute} that can generate the ASM code to create an equivalent
+ * attribute.
+ *
+ * @author Eugene Kuleshov
+ */
+// DontCheck(AbbreviationAsWordInName): can't be renamed (for backward binary compatibility).
+public interface ASMifierSupport {
+
+    /**
+      * Generates the ASM code to create an attribute equal to this attribute.
+      *
+      * @param outputBuilder where the generated code must be appended.
+      * @param visitorVariableName the name of the visitor variable in the produced code.
+      * @param labelNames the names of the labels in the generated code.
+      */
+    void asmify(
+            StringBuilder outputBuilder, String visitorVariableName, Map<Label, String> labelNames);
+}
diff --git a/tests/test_data/std/jdk/internal/org/objectweb/asm/util/CheckAnnotationAdapter.class b/tests/test_data/std/jdk/internal/org/objectweb/asm/util/CheckAnnotationAdapter.class
new file mode 100644
index 0000000000000000000000000000000000000000..2ca9b696554bfc02af6cf0e68af0800778715b08
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literal 0
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diff --git a/tests/test_data/std/jdk/internal/org/objectweb/asm/util/CheckAnnotationAdapter.java b/tests/test_data/std/jdk/internal/org/objectweb/asm/util/CheckAnnotationAdapter.java
new file mode 100644
index 00000000..1133c5ee
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/org/objectweb/asm/util/CheckAnnotationAdapter.java
@@ -0,0 +1,167 @@
+/*
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/*
+ * This file is available under and governed by the GNU General Public
+ * License version 2 only, as published by the Free Software Foundation.
+ * However, the following notice accompanied the original version of this
+ * file:
+ *
+ * ASM: a very small and fast Java bytecode manipulation framework
+ * Copyright (c) 2000-2011 INRIA, France Telecom
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the copyright holders nor the names of its
+ *    contributors may be used to endorse or promote products derived from
+ *    this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+package jdk.internal.org.objectweb.asm.util;
+
+import jdk.internal.org.objectweb.asm.AnnotationVisitor;
+import jdk.internal.org.objectweb.asm.Opcodes;
+import jdk.internal.org.objectweb.asm.Type;
+
+/**
+ * An {@link AnnotationVisitor} that checks that its methods are properly used.
+ *
+ * @author Eric Bruneton
+ */
+public class CheckAnnotationAdapter extends AnnotationVisitor {
+
+    /**
+      * Whether the values of the visited annotation are named. AnnotationVisitor instances used for
+      * annotation default and annotation arrays use unnamed values.
+      */
+    private final boolean useNamedValue;
+
+    /** Whether the {@link #visitEnd} method has been called. */
+    private boolean visitEndCalled;
+
+    public CheckAnnotationAdapter(final AnnotationVisitor annotationVisitor) {
+        this(annotationVisitor, true);
+    }
+
+    CheckAnnotationAdapter(final AnnotationVisitor annotationVisitor, final boolean useNamedValues) {
+        super(/* latest api = */ Opcodes.ASM9, annotationVisitor);
+        this.useNamedValue = useNamedValues;
+    }
+
+    @Override
+    public void visit(final String name, final Object value) {
+        checkVisitEndNotCalled();
+        checkName(name);
+        if (!(value instanceof Byte
+                || value instanceof Boolean
+                || value instanceof Character
+                || value instanceof Short
+                || value instanceof Integer
+                || value instanceof Long
+                || value instanceof Float
+                || value instanceof Double
+                || value instanceof String
+                || value instanceof Type
+                || value instanceof byte[]
+                || value instanceof boolean[]
+                || value instanceof char[]
+                || value instanceof short[]
+                || value instanceof int[]
+                || value instanceof long[]
+                || value instanceof float[]
+                || value instanceof double[])) {
+            throw new IllegalArgumentException("Invalid annotation value");
+        }
+        if (value instanceof Type && ((Type) value).getSort() == Type.METHOD) {
+            throw new IllegalArgumentException("Invalid annotation value");
+        }
+        super.visit(name, value);
+    }
+
+    @Override
+    public void visitEnum(final String name, final String descriptor, final String value) {
+        checkVisitEndNotCalled();
+        checkName(name);
+        // Annotations can only appear in V1_5 or more classes.
+        CheckMethodAdapter.checkDescriptor(Opcodes.V1_5, descriptor, false);
+        if (value == null) {
+            throw new IllegalArgumentException("Invalid enum value");
+        }
+        super.visitEnum(name, descriptor, value);
+    }
+
+    @Override
+    public AnnotationVisitor visitAnnotation(final String name, final String descriptor) {
+        checkVisitEndNotCalled();
+        checkName(name);
+        // Annotations can only appear in V1_5 or more classes.
+        CheckMethodAdapter.checkDescriptor(Opcodes.V1_5, descriptor, false);
+        return new CheckAnnotationAdapter(super.visitAnnotation(name, descriptor));
+    }
+
+    @Override
+    public AnnotationVisitor visitArray(final String name) {
+        checkVisitEndNotCalled();
+        checkName(name);
+        return new CheckAnnotationAdapter(super.visitArray(name), false);
+    }
+
+    @Override
+    public void visitEnd() {
+        checkVisitEndNotCalled();
+        visitEndCalled = true;
+        super.visitEnd();
+    }
+
+    private void checkName(final String name) {
+        if (useNamedValue && name == null) {
+            throw new IllegalArgumentException("Annotation value name must not be null");
+        }
+    }
+
+    private void checkVisitEndNotCalled() {
+        if (visitEndCalled) {
+            throw new IllegalStateException("Cannot call a visit method after visitEnd has been called");
+        }
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/org/objectweb/asm/util/CheckClassAdapter$1.class b/tests/test_data/std/jdk/internal/org/objectweb/asm/util/CheckClassAdapter$1.class
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literal 0
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diff --git a/tests/test_data/std/jdk/internal/org/objectweb/asm/util/CheckClassAdapter.class b/tests/test_data/std/jdk/internal/org/objectweb/asm/util/CheckClassAdapter.class
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diff --git a/tests/test_data/std/jdk/internal/org/objectweb/asm/util/CheckClassAdapter.java b/tests/test_data/std/jdk/internal/org/objectweb/asm/util/CheckClassAdapter.java
new file mode 100644
index 00000000..49f4bc78
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/org/objectweb/asm/util/CheckClassAdapter.java
@@ -0,0 +1,1169 @@
+/*
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/*
+ * This file is available under and governed by the GNU General Public
+ * License version 2 only, as published by the Free Software Foundation.
+ * However, the following notice accompanied the original version of this
+ * file:
+ *
+ * ASM: a very small and fast Java bytecode manipulation framework
+ * Copyright (c) 2000-2011 INRIA, France Telecom
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the copyright holders nor the names of its
+ *    contributors may be used to endorse or promote products derived from
+ *    this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+package jdk.internal.org.objectweb.asm.util;
+
+import java.io.FileInputStream;
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.PrintWriter;
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import jdk.internal.org.objectweb.asm.AnnotationVisitor;
+import jdk.internal.org.objectweb.asm.Attribute;
+import jdk.internal.org.objectweb.asm.ClassReader;
+import jdk.internal.org.objectweb.asm.ClassVisitor;
+import jdk.internal.org.objectweb.asm.ClassWriter;
+import jdk.internal.org.objectweb.asm.FieldVisitor;
+import jdk.internal.org.objectweb.asm.Label;
+import jdk.internal.org.objectweb.asm.MethodVisitor;
+import jdk.internal.org.objectweb.asm.ModuleVisitor;
+import jdk.internal.org.objectweb.asm.Opcodes;
+import jdk.internal.org.objectweb.asm.RecordComponentVisitor;
+import jdk.internal.org.objectweb.asm.Type;
+import jdk.internal.org.objectweb.asm.TypePath;
+import jdk.internal.org.objectweb.asm.TypeReference;
+import jdk.internal.org.objectweb.asm.tree.ClassNode;
+import jdk.internal.org.objectweb.asm.tree.MethodNode;
+import jdk.internal.org.objectweb.asm.tree.TryCatchBlockNode;
+import jdk.internal.org.objectweb.asm.tree.analysis.Analyzer;
+import jdk.internal.org.objectweb.asm.tree.analysis.AnalyzerException;
+import jdk.internal.org.objectweb.asm.tree.analysis.BasicValue;
+import jdk.internal.org.objectweb.asm.tree.analysis.Frame;
+import jdk.internal.org.objectweb.asm.tree.analysis.SimpleVerifier;
+
+/**
+ * A {@link ClassVisitor} that checks that its methods are properly used. More precisely this class
+ * adapter checks each method call individually, based <i>only</i> on its arguments, but does
+ * <i>not</i> check the <i>sequence</i> of method calls. For example, the invalid sequence {@code
+ * visitField(ACC_PUBLIC, "i", "I", null)} {@code visitField(ACC_PUBLIC, "i", "D", null)} will
+ * <i>not</i> be detected by this class adapter.
+ *
+ * <p><code>CheckClassAdapter</code> can be also used to verify bytecode transformations in order to
+ * make sure that the transformed bytecode is sane. For example:
+ *
+ * <pre>
+ * InputStream inputStream = ...; // get bytes for the source class
+ * ClassReader classReader = new ClassReader(inputStream);
+ * ClassWriter classWriter = new ClassWriter(classReader, ClassWriter.COMPUTE_MAXS);
+ * ClassVisitor classVisitor = new <b>MyClassAdapter</b>(new CheckClassAdapter(classWriter, true));
+ * classReader.accept(classVisitor, 0);
+ *
+ * StringWriter stringWriter = new StringWriter();
+ * PrintWriter printWriter = new PrintWriter(stringWriter);
+ * CheckClassAdapter.verify(new ClassReader(classWriter.toByteArray()), false, printWriter);
+ * assertTrue(stringWriter.toString().isEmpty());
+ * </pre>
+ *
+ * <p>The above code pass the transformed bytecode through a <code>CheckClassAdapter</code>, with
+ * data flow checks enabled. These checks are not exactly the same as the JVM verification, but
+ * provide some basic type checking for each method instruction. If the bytecode has errors, the
+ * output text shows the erroneous instruction number, and a dump of the failed method with
+ * information about the type of the local variables and of the operand stack slots for each
+ * instruction. For example (format is - insnNumber locals : stack):
+ *
+ * <pre>
+ * jdk.internal.org.objectweb.asm.tree.analysis.AnalyzerException: Error at instruction 71: Expected I, but found .
+ *   at jdk.internal.org.objectweb.asm.tree.analysis.Analyzer.analyze(Analyzer.java:...)
+ *   at jdk.internal.org.objectweb.asm.util.CheckClassAdapter.verify(CheckClassAdapter.java:...)
+ * ...
+ * remove()V
+ * 00000 LinkedBlockingQueue$Itr . . . . . . . .  : ICONST_0
+ * 00001 LinkedBlockingQueue$Itr . . . . . . . .  : I ISTORE 2
+ * 00001 LinkedBlockingQueue$Itr <b>.</b> I . . . . . .  :
+ * ...
+ * 00071 LinkedBlockingQueue$Itr <b>.</b> I . . . . . .  : ILOAD 1
+ * 00072 <b>?</b> INVOKESPECIAL java/lang/Integer.&lt;init&gt; (I)V
+ * ...
+ * </pre>
+ *
+ * <p>The above output shows that the local variable 1, loaded by the <code>ILOAD 1</code>
+ * instruction at position <code>00071</code> is not initialized, whereas the local variable 2 is
+ * initialized and contains an int value.
+ *
+ * @author Eric Bruneton
+ */
+public class CheckClassAdapter extends ClassVisitor {
+
+    /** The help message shown when command line arguments are incorrect. */
+    private static final String USAGE =
+            "Verifies the given class.\n"
+                    + "Usage: CheckClassAdapter <fully qualified class name or class file name>";
+
+    private static final String ERROR_AT = ": error at index ";
+
+    /** Whether the bytecode must be checked with a BasicVerifier. */
+    private boolean checkDataFlow;
+
+    /** The class version number. */
+    private int version;
+
+    /** Whether the {@link #visit} method has been called. */
+    private boolean visitCalled;
+
+    /** Whether the {@link #visitModule} method has been called. */
+    private boolean visitModuleCalled;
+
+    /** Whether the {@link #visitSource} method has been called. */
+    private boolean visitSourceCalled;
+
+    /** Whether the {@link #visitOuterClass} method has been called. */
+    private boolean visitOuterClassCalled;
+
+    /** Whether the {@link #visitNestHost} method has been called. */
+    private boolean visitNestHostCalled;
+
+    /**
+      * The common package of all the nest members. Not {@literal null} if the visitNestMember method
+      * has been called.
+      */
+    private String nestMemberPackageName;
+
+    /** Whether the {@link #visitEnd} method has been called. */
+    private boolean visitEndCalled;
+
+    /** The index of the instruction designated by each visited label so far. */
+    private Map<Label, Integer> labelInsnIndices;
+
+    // -----------------------------------------------------------------------------------------------
+    // Constructors
+    // -----------------------------------------------------------------------------------------------
+
+    /**
+      * Constructs a new {@link CheckClassAdapter}. <i>Subclasses must not use this constructor</i>.
+      * Instead, they must use the {@link #CheckClassAdapter(int, ClassVisitor, boolean)} version.
+      *
+      * @param classVisitor the class visitor to which this adapter must delegate calls.
+      */
+    public CheckClassAdapter(final ClassVisitor classVisitor) {
+        this(classVisitor, /* checkDataFlow = */ true);
+    }
+
+    /**
+      * Constructs a new {@link CheckClassAdapter}. <i>Subclasses must not use this constructor</i>.
+      * Instead, they must use the {@link #CheckClassAdapter(int, ClassVisitor, boolean)} version.
+      *
+      * @param classVisitor the class visitor to which this adapter must delegate calls.
+      * @param checkDataFlow whether to perform basic data flow checks.
+      * @throws IllegalStateException If a subclass calls this constructor.
+      */
+    public CheckClassAdapter(final ClassVisitor classVisitor, final boolean checkDataFlow) {
+        this(/* latest api = */ Opcodes.ASM9, classVisitor, checkDataFlow);
+        if (getClass() != CheckClassAdapter.class) {
+            throw new IllegalStateException();
+        }
+    }
+
+    /**
+      * Constructs a new {@link CheckClassAdapter}.
+      *
+      * @param api the ASM API version implemented by this visitor. Must be one of the {@code
+      *     ASM}<i>x</i> values in {@link Opcodes}.
+      * @param classVisitor the class visitor to which this adapter must delegate calls.
+      * @param checkDataFlow {@literal true} to perform basic data flow checks, or {@literal false} to
+      *     not perform any data flow check (see {@link CheckMethodAdapter}).
+      */
+    protected CheckClassAdapter(
+            final int api, final ClassVisitor classVisitor, final boolean checkDataFlow) {
+        super(api, classVisitor);
+        this.labelInsnIndices = new HashMap<>();
+        this.checkDataFlow = checkDataFlow;
+    }
+
+    // -----------------------------------------------------------------------------------------------
+    // Implementation of the ClassVisitor interface
+    // -----------------------------------------------------------------------------------------------
+
+    @Override
+    public void visit(
+            final int version,
+            final int access,
+            final String name,
+            final String signature,
+            final String superName,
+            final String[] interfaces) {
+        if (visitCalled) {
+            throw new IllegalStateException("visit must be called only once");
+        }
+        visitCalled = true;
+        checkState();
+        checkAccess(
+                access,
+                Opcodes.ACC_PUBLIC
+                        | Opcodes.ACC_FINAL
+                        | Opcodes.ACC_SUPER
+                        | Opcodes.ACC_INTERFACE
+                        | Opcodes.ACC_ABSTRACT
+                        | Opcodes.ACC_SYNTHETIC
+                        | Opcodes.ACC_ANNOTATION
+                        | Opcodes.ACC_ENUM
+                        | Opcodes.ACC_DEPRECATED
+                        | Opcodes.ACC_RECORD
+                        | Opcodes.ACC_MODULE);
+        if (name == null) {
+            throw new IllegalArgumentException("Illegal class name (null)");
+        }
+        if (!name.endsWith("package-info") && !name.endsWith("module-info")) {
+            CheckMethodAdapter.checkInternalName(version, name, "class name");
+        }
+        if ("java/lang/Object".equals(name)) {
+            if (superName != null) {
+                throw new IllegalArgumentException(
+                        "The super class name of the Object class must be 'null'");
+            }
+        } else if (name.endsWith("module-info")) {
+            if (superName != null) {
+                throw new IllegalArgumentException(
+                        "The super class name of a module-info class must be 'null'");
+            }
+        } else {
+            CheckMethodAdapter.checkInternalName(version, superName, "super class name");
+        }
+        if (signature != null) {
+            checkClassSignature(signature);
+        }
+        if ((access & Opcodes.ACC_INTERFACE) != 0 && !"java/lang/Object".equals(superName)) {
+            throw new IllegalArgumentException(
+                    "The super class name of interfaces must be 'java/lang/Object'");
+        }
+        if (interfaces != null) {
+            for (int i = 0; i < interfaces.length; ++i) {
+                CheckMethodAdapter.checkInternalName(
+                        version, interfaces[i], "interface name at index " + i);
+            }
+        }
+        this.version = version;
+        super.visit(version, access, name, signature, superName, interfaces);
+    }
+
+    @Override
+    public void visitSource(final String file, final String debug) {
+        checkState();
+        if (visitSourceCalled) {
+            throw new IllegalStateException("visitSource can be called only once.");
+        }
+        visitSourceCalled = true;
+        super.visitSource(file, debug);
+    }
+
+    @Override
+    public ModuleVisitor visitModule(final String name, final int access, final String version) {
+        checkState();
+        if (visitModuleCalled) {
+            throw new IllegalStateException("visitModule can be called only once.");
+        }
+        visitModuleCalled = true;
+        checkFullyQualifiedName(this.version, name, "module name");
+        checkAccess(access, Opcodes.ACC_OPEN | Opcodes.ACC_SYNTHETIC | Opcodes.ACC_MANDATED);
+        CheckModuleAdapter checkModuleAdapter =
+                new CheckModuleAdapter(
+                        api, super.visitModule(name, access, version), (access & Opcodes.ACC_OPEN) != 0);
+        checkModuleAdapter.classVersion = this.version;
+        return checkModuleAdapter;
+    }
+
+    @Override
+    public void visitNestHost(final String nestHost) {
+        checkState();
+        CheckMethodAdapter.checkInternalName(version, nestHost, "nestHost");
+        if (visitNestHostCalled) {
+            throw new IllegalStateException("visitNestHost can be called only once.");
+        }
+        if (nestMemberPackageName != null) {
+            throw new IllegalStateException("visitNestHost and visitNestMember are mutually exclusive.");
+        }
+        visitNestHostCalled = true;
+        super.visitNestHost(nestHost);
+    }
+
+    @Override
+    public void visitNestMember(final String nestMember) {
+        checkState();
+        CheckMethodAdapter.checkInternalName(version, nestMember, "nestMember");
+        if (visitNestHostCalled) {
+            throw new IllegalStateException(
+                    "visitMemberOfNest and visitNestHost are mutually exclusive.");
+        }
+        String packageName = packageName(nestMember);
+        if (nestMemberPackageName == null) {
+            nestMemberPackageName = packageName;
+        } else if (!nestMemberPackageName.equals(packageName)) {
+            throw new IllegalStateException(
+                    "nest member " + nestMember + " should be in the package " + nestMemberPackageName);
+        }
+        super.visitNestMember(nestMember);
+    }
+
+    @Override
+    public void visitPermittedSubclass(final String permittedSubclass) {
+        checkState();
+        CheckMethodAdapter.checkInternalName(version, permittedSubclass, "permittedSubclass");
+        super.visitPermittedSubclass(permittedSubclass);
+    }
+
+    @Override
+    public void visitOuterClass(final String owner, final String name, final String descriptor) {
+        checkState();
+        if (visitOuterClassCalled) {
+            throw new IllegalStateException("visitOuterClass can be called only once.");
+        }
+        visitOuterClassCalled = true;
+        if (owner == null) {
+            throw new IllegalArgumentException("Illegal outer class owner");
+        }
+        if (descriptor != null) {
+            CheckMethodAdapter.checkMethodDescriptor(version, descriptor);
+        }
+        super.visitOuterClass(owner, name, descriptor);
+    }
+
+    @Override
+    public void visitInnerClass(
+            final String name, final String outerName, final String innerName, final int access) {
+        checkState();
+        CheckMethodAdapter.checkInternalName(version, name, "class name");
+        if (outerName != null) {
+            CheckMethodAdapter.checkInternalName(version, outerName, "outer class name");
+        }
+        if (innerName != null) {
+            int startIndex = 0;
+            while (startIndex < innerName.length() && Character.isDigit(innerName.charAt(startIndex))) {
+                startIndex++;
+            }
+            if (startIndex == 0 || startIndex < innerName.length()) {
+                CheckMethodAdapter.checkIdentifier(version, innerName, startIndex, -1, "inner class name");
+            }
+        }
+        checkAccess(
+                access,
+                Opcodes.ACC_PUBLIC
+                        | Opcodes.ACC_PRIVATE
+                        | Opcodes.ACC_PROTECTED
+                        | Opcodes.ACC_STATIC
+                        | Opcodes.ACC_FINAL
+                        | Opcodes.ACC_INTERFACE
+                        | Opcodes.ACC_ABSTRACT
+                        | Opcodes.ACC_SYNTHETIC
+                        | Opcodes.ACC_ANNOTATION
+                        | Opcodes.ACC_ENUM);
+        super.visitInnerClass(name, outerName, innerName, access);
+    }
+
+    @Override
+    public RecordComponentVisitor visitRecordComponent(
+            final String name, final String descriptor, final String signature) {
+        checkState();
+        CheckMethodAdapter.checkUnqualifiedName(version, name, "record component name");
+        CheckMethodAdapter.checkDescriptor(version, descriptor, /* canBeVoid = */ false);
+        if (signature != null) {
+            checkFieldSignature(signature);
+        }
+        return new CheckRecordComponentAdapter(
+                api, super.visitRecordComponent(name, descriptor, signature));
+    }
+
+    @Override
+    public FieldVisitor visitField(
+            final int access,
+            final String name,
+            final String descriptor,
+            final String signature,
+            final Object value) {
+        checkState();
+        checkAccess(
+                access,
+                Opcodes.ACC_PUBLIC
+                        | Opcodes.ACC_PRIVATE
+                        | Opcodes.ACC_PROTECTED
+                        | Opcodes.ACC_STATIC
+                        | Opcodes.ACC_FINAL
+                        | Opcodes.ACC_VOLATILE
+                        | Opcodes.ACC_TRANSIENT
+                        | Opcodes.ACC_SYNTHETIC
+                        | Opcodes.ACC_ENUM
+                        | Opcodes.ACC_MANDATED
+                        | Opcodes.ACC_DEPRECATED);
+        CheckMethodAdapter.checkUnqualifiedName(version, name, "field name");
+        CheckMethodAdapter.checkDescriptor(version, descriptor, /* canBeVoid = */ false);
+        if (signature != null) {
+            checkFieldSignature(signature);
+        }
+        if (value != null) {
+            CheckMethodAdapter.checkConstant(value);
+        }
+        return new CheckFieldAdapter(api, super.visitField(access, name, descriptor, signature, value));
+    }
+
+    @Override
+    public MethodVisitor visitMethod(
+            final int access,
+            final String name,
+            final String descriptor,
+            final String signature,
+            final String[] exceptions) {
+        checkState();
+        checkMethodAccess(
+                version,
+                access,
+                Opcodes.ACC_PUBLIC
+                        | Opcodes.ACC_PRIVATE
+                        | Opcodes.ACC_PROTECTED
+                        | Opcodes.ACC_STATIC
+                        | Opcodes.ACC_FINAL
+                        | Opcodes.ACC_SYNCHRONIZED
+                        | Opcodes.ACC_BRIDGE
+                        | Opcodes.ACC_VARARGS
+                        | Opcodes.ACC_NATIVE
+                        | Opcodes.ACC_ABSTRACT
+                        | Opcodes.ACC_STRICT
+                        | Opcodes.ACC_SYNTHETIC
+                        | Opcodes.ACC_MANDATED
+                        | Opcodes.ACC_DEPRECATED);
+        if (!"<init>".equals(name) && !"<clinit>".equals(name)) {
+            CheckMethodAdapter.checkMethodIdentifier(version, name, "method name");
+        }
+        CheckMethodAdapter.checkMethodDescriptor(version, descriptor);
+        if (signature != null) {
+            checkMethodSignature(signature);
+        }
+        if (exceptions != null) {
+            for (int i = 0; i < exceptions.length; ++i) {
+                CheckMethodAdapter.checkInternalName(
+                        version, exceptions[i], "exception name at index " + i);
+            }
+        }
+        CheckMethodAdapter checkMethodAdapter;
+        MethodVisitor methodVisitor =
+                super.visitMethod(access, name, descriptor, signature, exceptions);
+        if (checkDataFlow) {
+            if (cv instanceof ClassWriter) {
+                methodVisitor =
+                        new CheckMethodAdapter.MethodWriterWrapper(
+                                api, version, (ClassWriter) cv, methodVisitor);
+            }
+            checkMethodAdapter =
+                    new CheckMethodAdapter(api, access, name, descriptor, methodVisitor, labelInsnIndices);
+        } else {
+            checkMethodAdapter = new CheckMethodAdapter(api, methodVisitor, labelInsnIndices);
+        }
+        checkMethodAdapter.version = version;
+        return checkMethodAdapter;
+    }
+
+    @Override
+    public AnnotationVisitor visitAnnotation(final String descriptor, final boolean visible) {
+        checkState();
+        CheckMethodAdapter.checkDescriptor(version, descriptor, false);
+        return new CheckAnnotationAdapter(super.visitAnnotation(descriptor, visible));
+    }
+
+    @Override
+    public AnnotationVisitor visitTypeAnnotation(
+            final int typeRef, final TypePath typePath, final String descriptor, final boolean visible) {
+        checkState();
+        int sort = new TypeReference(typeRef).getSort();
+        if (sort != TypeReference.CLASS_TYPE_PARAMETER
+                && sort != TypeReference.CLASS_TYPE_PARAMETER_BOUND
+                && sort != TypeReference.CLASS_EXTENDS) {
+            throw new IllegalArgumentException(
+                    "Invalid type reference sort 0x" + Integer.toHexString(sort));
+        }
+        checkTypeRef(typeRef);
+        CheckMethodAdapter.checkDescriptor(version, descriptor, false);
+        return new CheckAnnotationAdapter(
+                super.visitTypeAnnotation(typeRef, typePath, descriptor, visible));
+    }
+
+    @Override
+    public void visitAttribute(final Attribute attribute) {
+        checkState();
+        if (attribute == null) {
+            throw new IllegalArgumentException("Invalid attribute (must not be null)");
+        }
+        super.visitAttribute(attribute);
+    }
+
+    @Override
+    public void visitEnd() {
+        checkState();
+        visitEndCalled = true;
+        super.visitEnd();
+    }
+
+    // -----------------------------------------------------------------------------------------------
+    // Utility methods
+    // -----------------------------------------------------------------------------------------------
+
+    /** Checks that the visit method has been called and that visitEnd has not been called. */
+    private void checkState() {
+        if (!visitCalled) {
+            throw new IllegalStateException("Cannot visit member before visit has been called.");
+        }
+        if (visitEndCalled) {
+            throw new IllegalStateException("Cannot visit member after visitEnd has been called.");
+        }
+    }
+
+    /**
+      * Checks that the given access flags do not contain invalid flags. This method also checks that
+      * mutually incompatible flags are not set simultaneously.
+      *
+      * @param access the access flags to be checked.
+      * @param possibleAccess the valid access flags.
+      */
+    static void checkAccess(final int access, final int possibleAccess) {
+        if ((access & ~possibleAccess) != 0) {
+            throw new IllegalArgumentException("Invalid access flags: " + access);
+        }
+        int publicProtectedPrivate = Opcodes.ACC_PUBLIC | Opcodes.ACC_PROTECTED | Opcodes.ACC_PRIVATE;
+        if (Integer.bitCount(access & publicProtectedPrivate) > 1) {
+            throw new IllegalArgumentException(
+                    "public, protected and private are mutually exclusive: " + access);
+        }
+        if (Integer.bitCount(access & (Opcodes.ACC_FINAL | Opcodes.ACC_ABSTRACT)) > 1) {
+            throw new IllegalArgumentException("final and abstract are mutually exclusive: " + access);
+        }
+    }
+
+    /**
+      * Checks that the given access flags do not contain invalid flags for a method. This method also
+      * checks that mutually incompatible flags are not set simultaneously.
+      *
+      * @param version the class version.
+      * @param access the method access flags to be checked.
+      * @param possibleAccess the valid access flags.
+      */
+    private static void checkMethodAccess(
+            final int version, final int access, final int possibleAccess) {
+        checkAccess(access, possibleAccess);
+        if ((version & 0xFFFF) < Opcodes.V17
+                && Integer.bitCount(access & (Opcodes.ACC_STRICT | Opcodes.ACC_ABSTRACT)) > 1) {
+            throw new IllegalArgumentException("strictfp and abstract are mutually exclusive: " + access);
+        }
+    }
+
+    /**
+      * Checks that the given name is a fully qualified name, using dots.
+      *
+      * @param version the class version.
+      * @param name the name to be checked.
+      * @param source the source of 'name' (e.g 'module' for a module name).
+      */
+    static void checkFullyQualifiedName(final int version, final String name, final String source) {
+        try {
+            int startIndex = 0;
+            int dotIndex;
+            while ((dotIndex = name.indexOf('.', startIndex + 1)) != -1) {
+                CheckMethodAdapter.checkIdentifier(version, name, startIndex, dotIndex, null);
+                startIndex = dotIndex + 1;
+            }
+            CheckMethodAdapter.checkIdentifier(version, name, startIndex, name.length(), null);
+        } catch (IllegalArgumentException e) {
+            throw new IllegalArgumentException(
+                    "Invalid " + source + " (must be a fully qualified name): " + name, e);
+        }
+    }
+
+    /**
+      * Checks a class signature.
+      *
+      * @param signature a string containing the signature that must be checked.
+      */
+    public static void checkClassSignature(final String signature) {
+        // From https://docs.oracle.com/javase/specs/jvms/se9/html/jvms-4.html#jvms-4.7.9.1:
+        // ClassSignature:
+        //   [TypeParameters] SuperclassSignature SuperinterfaceSignature*
+        // SuperclassSignature:
+        //   ClassTypeSignature
+        // SuperinterfaceSignature:
+        //   ClassTypeSignature
+        int pos = 0;
+        if (getChar(signature, 0) == '<') {
+            pos = checkTypeParameters(signature, pos);
+        }
+        pos = checkClassTypeSignature(signature, pos);
+        while (getChar(signature, pos) == 'L') {
+            pos = checkClassTypeSignature(signature, pos);
+        }
+        if (pos != signature.length()) {
+            throw new IllegalArgumentException(signature + ERROR_AT + pos);
+        }
+    }
+
+    /**
+      * Checks a method signature.
+      *
+      * @param signature a string containing the signature that must be checked.
+      */
+    public static void checkMethodSignature(final String signature) {
+        // From https://docs.oracle.com/javase/specs/jvms/se9/html/jvms-4.html#jvms-4.7.9.1:
+        // MethodSignature:
+        //   [TypeParameters] ( JavaTypeSignature* ) Result ThrowsSignature*
+        // Result:
+        //   JavaTypeSignature
+        //   VoidDescriptor
+        // ThrowsSignature:
+        //   ^ ClassTypeSignature
+        //   ^ TypeVariableSignature
+        int pos = 0;
+        if (getChar(signature, 0) == '<') {
+            pos = checkTypeParameters(signature, pos);
+        }
+        pos = checkChar('(', signature, pos);
+        while ("ZCBSIFJDL[T".indexOf(getChar(signature, pos)) != -1) {
+            pos = checkJavaTypeSignature(signature, pos);
+        }
+        pos = checkChar(')', signature, pos);
+        if (getChar(signature, pos) == 'V') {
+            ++pos;
+        } else {
+            pos = checkJavaTypeSignature(signature, pos);
+        }
+        while (getChar(signature, pos) == '^') {
+            ++pos;
+            if (getChar(signature, pos) == 'L') {
+                pos = checkClassTypeSignature(signature, pos);
+            } else {
+                pos = checkTypeVariableSignature(signature, pos);
+            }
+        }
+        if (pos != signature.length()) {
+            throw new IllegalArgumentException(signature + ERROR_AT + pos);
+        }
+    }
+
+    /**
+      * Checks a field signature.
+      *
+      * @param signature a string containing the signature that must be checked.
+      */
+    public static void checkFieldSignature(final String signature) {
+        // From https://docs.oracle.com/javase/specs/jvms/se9/html/jvms-4.html#jvms-4.7.9.1:
+        // FieldSignature:
+        //   ReferenceTypeSignature
+        int pos = checkReferenceTypeSignature(signature, 0);
+        if (pos != signature.length()) {
+            throw new IllegalArgumentException(signature + ERROR_AT + pos);
+        }
+    }
+
+    /**
+      * Checks the type parameters of a class or method signature.
+      *
+      * @param signature a string containing the signature that must be checked.
+      * @param startPos index of first character to be checked.
+      * @return the index of the first character after the checked part.
+      */
+    private static int checkTypeParameters(final String signature, final int startPos) {
+        // From https://docs.oracle.com/javase/specs/jvms/se9/html/jvms-4.html#jvms-4.7.9.1:
+        // TypeParameters:
+        //   < TypeParameter TypeParameter* >
+        int pos = startPos;
+        pos = checkChar('<', signature, pos);
+        pos = checkTypeParameter(signature, pos);
+        while (getChar(signature, pos) != '>') {
+            pos = checkTypeParameter(signature, pos);
+        }
+        return pos + 1;
+    }
+
+    /**
+      * Checks a type parameter of a class or method signature.
+      *
+      * @param signature a string containing the signature that must be checked.
+      * @param startPos index of first character to be checked.
+      * @return the index of the first character after the checked part.
+      */
+    private static int checkTypeParameter(final String signature, final int startPos) {
+        // From https://docs.oracle.com/javase/specs/jvms/se9/html/jvms-4.html#jvms-4.7.9.1:
+        // TypeParameter:
+        //   Identifier ClassBound InterfaceBound*
+        // ClassBound:
+        //   : [ReferenceTypeSignature]
+        // InterfaceBound:
+        //   : ReferenceTypeSignature
+        int pos = startPos;
+        pos = checkSignatureIdentifier(signature, pos);
+        pos = checkChar(':', signature, pos);
+        if ("L[T".indexOf(getChar(signature, pos)) != -1) {
+            pos = checkReferenceTypeSignature(signature, pos);
+        }
+        while (getChar(signature, pos) == ':') {
+            pos = checkReferenceTypeSignature(signature, pos + 1);
+        }
+        return pos;
+    }
+
+    /**
+      * Checks a reference type signature.
+      *
+      * @param signature a string containing the signature that must be checked.
+      * @param pos index of first character to be checked.
+      * @return the index of the first character after the checked part.
+      */
+    private static int checkReferenceTypeSignature(final String signature, final int pos) {
+        // From https://docs.oracle.com/javase/specs/jvms/se9/html/jvms-4.html#jvms-4.7.9.1:
+        // ReferenceTypeSignature:
+        //   ClassTypeSignature
+        //   TypeVariableSignature
+        //   ArrayTypeSignature
+        // ArrayTypeSignature:
+        //   [ JavaTypeSignature
+        switch (getChar(signature, pos)) {
+            case 'L':
+                return checkClassTypeSignature(signature, pos);
+            case '[':
+                return checkJavaTypeSignature(signature, pos + 1);
+            default:
+                return checkTypeVariableSignature(signature, pos);
+        }
+    }
+
+    /**
+      * Checks a class type signature.
+      *
+      * @param signature a string containing the signature that must be checked.
+      * @param startPos index of first character to be checked.
+      * @return the index of the first character after the checked part.
+      */
+    private static int checkClassTypeSignature(final String signature, final int startPos) {
+        // From https://docs.oracle.com/javase/specs/jvms/se9/html/jvms-4.html#jvms-4.7.9.1:
+        // ClassTypeSignature:
+        //   L [PackageSpecifier] SimpleClassTypeSignature ClassTypeSignatureSuffix* ;
+        // PackageSpecifier:
+        //   Identifier / PackageSpecifier*
+        // SimpleClassTypeSignature:
+        //   Identifier [TypeArguments]
+        // ClassTypeSignatureSuffix:
+        //   . SimpleClassTypeSignature
+        int pos = startPos;
+        pos = checkChar('L', signature, pos);
+        pos = checkSignatureIdentifier(signature, pos);
+        while (getChar(signature, pos) == '/') {
+            pos = checkSignatureIdentifier(signature, pos + 1);
+        }
+        if (getChar(signature, pos) == '<') {
+            pos = checkTypeArguments(signature, pos);
+        }
+        while (getChar(signature, pos) == '.') {
+            pos = checkSignatureIdentifier(signature, pos + 1);
+            if (getChar(signature, pos) == '<') {
+                pos = checkTypeArguments(signature, pos);
+            }
+        }
+        return checkChar(';', signature, pos);
+    }
+
+    /**
+      * Checks the type arguments in a class type signature.
+      *
+      * @param signature a string containing the signature that must be checked.
+      * @param startPos index of first character to be checked.
+      * @return the index of the first character after the checked part.
+      */
+    private static int checkTypeArguments(final String signature, final int startPos) {
+        // From https://docs.oracle.com/javase/specs/jvms/se9/html/jvms-4.html#jvms-4.7.9.1:
+        // TypeArguments:
+        //   < TypeArgument TypeArgument* >
+        int pos = startPos;
+        pos = checkChar('<', signature, pos);
+        pos = checkTypeArgument(signature, pos);
+        while (getChar(signature, pos) != '>') {
+            pos = checkTypeArgument(signature, pos);
+        }
+        return pos + 1;
+    }
+
+    /**
+      * Checks a type argument in a class type signature.
+      *
+      * @param signature a string containing the signature that must be checked.
+      * @param startPos index of first character to be checked.
+      * @return the index of the first character after the checked part.
+      */
+    private static int checkTypeArgument(final String signature, final int startPos) {
+        // From https://docs.oracle.com/javase/specs/jvms/se9/html/jvms-4.html#jvms-4.7.9.1:
+        // TypeArgument:
+        //   [WildcardIndicator] ReferenceTypeSignature
+        //   *
+        // WildcardIndicator:
+        //   +
+        //   -
+        int pos = startPos;
+        char c = getChar(signature, pos);
+        if (c == '*') {
+            return pos + 1;
+        } else if (c == '+' || c == '-') {
+            pos++;
+        }
+        return checkReferenceTypeSignature(signature, pos);
+    }
+
+    /**
+      * Checks a type variable signature.
+      *
+      * @param signature a string containing the signature that must be checked.
+      * @param startPos index of first character to be checked.
+      * @return the index of the first character after the checked part.
+      */
+    private static int checkTypeVariableSignature(final String signature, final int startPos) {
+        // From https://docs.oracle.com/javase/specs/jvms/se9/html/jvms-4.html#jvms-4.7.9.1:
+        // TypeVariableSignature:
+        //  T Identifier ;
+        int pos = startPos;
+        pos = checkChar('T', signature, pos);
+        pos = checkSignatureIdentifier(signature, pos);
+        return checkChar(';', signature, pos);
+    }
+
+    /**
+      * Checks a Java type signature.
+      *
+      * @param signature a string containing the signature that must be checked.
+      * @param startPos index of first character to be checked.
+      * @return the index of the first character after the checked part.
+      */
+    private static int checkJavaTypeSignature(final String signature, final int startPos) {
+        // From https://docs.oracle.com/javase/specs/jvms/se9/html/jvms-4.html#jvms-4.7.9.1:
+        // JavaTypeSignature:
+        //   ReferenceTypeSignature
+        //   BaseType
+        // BaseType:
+        //   (one of)
+        //   B C D F I J S Z
+        int pos = startPos;
+        switch (getChar(signature, pos)) {
+            case 'B':
+            case 'C':
+            case 'D':
+            case 'F':
+            case 'I':
+            case 'J':
+            case 'S':
+            case 'Z':
+                return pos + 1;
+            default:
+                return checkReferenceTypeSignature(signature, pos);
+        }
+    }
+
+    /**
+      * Checks an identifier.
+      *
+      * @param signature a string containing the signature that must be checked.
+      * @param startPos index of first character to be checked.
+      * @return the index of the first character after the checked part.
+      */
+    private static int checkSignatureIdentifier(final String signature, final int startPos) {
+        int pos = startPos;
+        while (pos < signature.length() && ".;[/<>:".indexOf(signature.codePointAt(pos)) == -1) {
+            pos = signature.offsetByCodePoints(pos, 1);
+        }
+        if (pos == startPos) {
+            throw new IllegalArgumentException(signature + ": identifier expected at index " + startPos);
+        }
+        return pos;
+    }
+
+    /**
+      * Checks a single character.
+      *
+      * @param c a character.
+      * @param signature a string containing the signature that must be checked.
+      * @param pos index of first character to be checked.
+      * @return the index of the first character after the checked part.
+      */
+    private static int checkChar(final char c, final String signature, final int pos) {
+        if (getChar(signature, pos) == c) {
+            return pos + 1;
+        }
+        throw new IllegalArgumentException(signature + ": '" + c + "' expected at index " + pos);
+    }
+
+    /**
+      * Returns the string character at the given index, or 0.
+      *
+      * @param string a string.
+      * @param pos an index in 'string'.
+      * @return the character at the given index, or 0 if there is no such character.
+      */
+    private static char getChar(final String string, final int pos) {
+        return pos < string.length() ? string.charAt(pos) : (char) 0;
+    }
+
+    /**
+      * Checks the reference to a type in a type annotation.
+      *
+      * @param typeRef a reference to an annotated type.
+      */
+    static void checkTypeRef(final int typeRef) {
+        int mask = 0;
+        switch (typeRef >>> 24) {
+            case TypeReference.CLASS_TYPE_PARAMETER:
+            case TypeReference.METHOD_TYPE_PARAMETER:
+            case TypeReference.METHOD_FORMAL_PARAMETER:
+                mask = 0xFFFF0000;
+                break;
+            case TypeReference.FIELD:
+            case TypeReference.METHOD_RETURN:
+            case TypeReference.METHOD_RECEIVER:
+            case TypeReference.LOCAL_VARIABLE:
+            case TypeReference.RESOURCE_VARIABLE:
+            case TypeReference.INSTANCEOF:
+            case TypeReference.NEW:
+            case TypeReference.CONSTRUCTOR_REFERENCE:
+            case TypeReference.METHOD_REFERENCE:
+                mask = 0xFF000000;
+                break;
+            case TypeReference.CLASS_EXTENDS:
+            case TypeReference.CLASS_TYPE_PARAMETER_BOUND:
+            case TypeReference.METHOD_TYPE_PARAMETER_BOUND:
+            case TypeReference.THROWS:
+            case TypeReference.EXCEPTION_PARAMETER:
+                mask = 0xFFFFFF00;
+                break;
+            case TypeReference.CAST:
+            case TypeReference.CONSTRUCTOR_INVOCATION_TYPE_ARGUMENT:
+            case TypeReference.METHOD_INVOCATION_TYPE_ARGUMENT:
+            case TypeReference.CONSTRUCTOR_REFERENCE_TYPE_ARGUMENT:
+            case TypeReference.METHOD_REFERENCE_TYPE_ARGUMENT:
+                mask = 0xFF0000FF;
+                break;
+            default:
+                break;
+        }
+        if (mask == 0 || (typeRef & ~mask) != 0) {
+            throw new IllegalArgumentException(
+                    "Invalid type reference 0x" + Integer.toHexString(typeRef));
+        }
+    }
+
+    /**
+      * Returns the package name of an internal name.
+      *
+      * @param name an internal name.
+      * @return the package name or "" if there is no package.
+      */
+    private static String packageName(final String name) {
+        int index = name.lastIndexOf('/');
+        if (index == -1) {
+            return "";
+        }
+        return name.substring(0, index);
+    }
+
+    // -----------------------------------------------------------------------------------------------
+    // Static verification methods
+    // -----------------------------------------------------------------------------------------------
+
+    /**
+      * Checks the given class.
+      *
+      * <p>Usage: CheckClassAdapter &lt;binary class name or class file name&gt;
+      *
+      * @param args the command line arguments.
+      * @throws IOException if the class cannot be found, or if an IO exception occurs.
+      */
+    public static void main(final String[] args) throws IOException {
+        main(args, new PrintWriter(System.err, true));
+    }
+
+    /**
+      * Checks the given class.
+      *
+      * @param args the command line arguments.
+      * @param logger where to log errors.
+      * @throws IOException if the class cannot be found, or if an IO exception occurs.
+      */
+    static void main(final String[] args, final PrintWriter logger) throws IOException {
+        if (args.length != 1) {
+            logger.println(USAGE);
+            return;
+        }
+
+        ClassReader classReader;
+        if (args[0].endsWith(".class")) {
+            // Can't fix PMD warning for 1.5 compatibility.
+            try (InputStream inputStream = new FileInputStream(args[0])) { // NOPMD(AvoidFileStream)
+                classReader = new ClassReader(inputStream);
+            }
+        } else {
+            classReader = new ClassReader(args[0]);
+        }
+
+        verify(classReader, false, logger);
+    }
+
+    /**
+      * Checks the given class.
+      *
+      * @param classReader the class to be checked.
+      * @param printResults whether to print the results of the bytecode verification.
+      * @param printWriter where the results (or the stack trace in case of error) must be printed.
+      */
+    public static void verify(
+            final ClassReader classReader, final boolean printResults, final PrintWriter printWriter) {
+        verify(classReader, null, printResults, printWriter);
+    }
+
+    /**
+      * Checks the given class.
+      *
+      * @param classReader the class to be checked.
+      * @param loader a <code>ClassLoader</code> which will be used to load referenced classes. May be
+      *     {@literal null}.
+      * @param printResults whether to print the results of the bytecode verification.
+      * @param printWriter where the results (or the stack trace in case of error) must be printed.
+      */
+    public static void verify(
+            final ClassReader classReader,
+            final ClassLoader loader,
+            final boolean printResults,
+            final PrintWriter printWriter) {
+        ClassNode classNode = new ClassNode();
+        classReader.accept(
+                new CheckClassAdapter(/*latest*/ Opcodes.ASM9, classNode, false) {},
+                ClassReader.SKIP_DEBUG);
+
+        Type syperType = classNode.superName == null ? null : Type.getObjectType(classNode.superName);
+        List<MethodNode> methods = classNode.methods;
+
+        List<Type> interfaces = new ArrayList<>();
+        for (String interfaceName : classNode.interfaces) {
+            interfaces.add(Type.getObjectType(interfaceName));
+        }
+
+        for (MethodNode method : methods) {
+            SimpleVerifier verifier =
+                    new SimpleVerifier(
+                            Type.getObjectType(classNode.name),
+                            syperType,
+                            interfaces,
+                            (classNode.access & Opcodes.ACC_INTERFACE) != 0);
+            Analyzer<BasicValue> analyzer = new Analyzer<>(verifier);
+            if (loader != null) {
+                verifier.setClassLoader(loader);
+            }
+            try {
+                analyzer.analyze(classNode.name, method);
+            } catch (AnalyzerException e) {
+                e.printStackTrace(printWriter);
+            }
+            if (printResults) {
+                printAnalyzerResult(method, analyzer, printWriter);
+            }
+        }
+        printWriter.flush();
+    }
+
+    static void printAnalyzerResult(
+            final MethodNode method, final Analyzer<BasicValue> analyzer, final PrintWriter printWriter) {
+        Textifier textifier = new Textifier();
+        TraceMethodVisitor traceMethodVisitor = new TraceMethodVisitor(textifier);
+
+        printWriter.println(method.name + method.desc);
+        for (int i = 0; i < method.instructions.size(); ++i) {
+            method.instructions.get(i).accept(traceMethodVisitor);
+
+            StringBuilder stringBuilder = new StringBuilder();
+            Frame<BasicValue> frame = analyzer.getFrames()[i];
+            if (frame == null) {
+                stringBuilder.append('?');
+            } else {
+                for (int j = 0; j < frame.getLocals(); ++j) {
+                    stringBuilder.append(getUnqualifiedName(frame.getLocal(j).toString())).append(' ');
+                }
+                stringBuilder.append(" : ");
+                for (int j = 0; j < frame.getStackSize(); ++j) {
+                    stringBuilder.append(getUnqualifiedName(frame.getStack(j).toString())).append(' ');
+                }
+            }
+            while (stringBuilder.length() < method.maxStack + method.maxLocals + 1) {
+                stringBuilder.append(' ');
+            }
+            printWriter.print(Integer.toString(i + 100000).substring(1));
+            printWriter.print(
+                    " " + stringBuilder + " : " + textifier.text.get(textifier.text.size() - 1));
+        }
+        for (TryCatchBlockNode tryCatchBlock : method.tryCatchBlocks) {
+            tryCatchBlock.accept(traceMethodVisitor);
+            printWriter.print(" " + textifier.text.get(textifier.text.size() - 1));
+        }
+        printWriter.println();
+    }
+
+    private static String getUnqualifiedName(final String name) {
+        int lastSlashIndex = name.lastIndexOf('/');
+        if (lastSlashIndex == -1) {
+            return name;
+        } else {
+            int endIndex = name.length();
+            if (name.charAt(endIndex - 1) == ';') {
+                endIndex--;
+            }
+            int lastBracketIndex = name.lastIndexOf('[');
+            if (lastBracketIndex == -1) {
+                return name.substring(lastSlashIndex + 1, endIndex);
+            }
+            return name.substring(0, lastBracketIndex + 1) + name.substring(lastSlashIndex + 1, endIndex);
+        }
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/org/objectweb/asm/util/CheckFieldAdapter.class b/tests/test_data/std/jdk/internal/org/objectweb/asm/util/CheckFieldAdapter.class
new file mode 100644
index 0000000000000000000000000000000000000000..b4b3abde6f152d8404b4c7adbd001bec151f04c7
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diff --git a/tests/test_data/std/jdk/internal/org/objectweb/asm/util/CheckFieldAdapter.java b/tests/test_data/std/jdk/internal/org/objectweb/asm/util/CheckFieldAdapter.java
new file mode 100644
index 00000000..16b0ea8d
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/org/objectweb/asm/util/CheckFieldAdapter.java
@@ -0,0 +1,148 @@
+/*
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/*
+ * This file is available under and governed by the GNU General Public
+ * License version 2 only, as published by the Free Software Foundation.
+ * However, the following notice accompanied the original version of this
+ * file:
+ *
+ * ASM: a very small and fast Java bytecode manipulation framework
+ * Copyright (c) 2000-2011 INRIA, France Telecom
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the copyright holders nor the names of its
+ *    contributors may be used to endorse or promote products derived from
+ *    this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+package jdk.internal.org.objectweb.asm.util;
+
+import jdk.internal.org.objectweb.asm.AnnotationVisitor;
+import jdk.internal.org.objectweb.asm.Attribute;
+import jdk.internal.org.objectweb.asm.FieldVisitor;
+import jdk.internal.org.objectweb.asm.Opcodes;
+import jdk.internal.org.objectweb.asm.TypePath;
+import jdk.internal.org.objectweb.asm.TypeReference;
+
+/**
+ * A {@link FieldVisitor} that checks that its methods are properly used.
+ *
+ * @author Eric Bruneton
+ */
+public class CheckFieldAdapter extends FieldVisitor {
+
+    /** Whether the {@link #visitEnd} method has been called. */
+    private boolean visitEndCalled;
+
+    /**
+      * Constructs a new {@link CheckFieldAdapter}. <i>Subclasses must not use this constructor</i>.
+      * Instead, they must use the {@link #CheckFieldAdapter(int, FieldVisitor)} version.
+      *
+      * @param fieldVisitor the field visitor to which this adapter must delegate calls.
+      * @throws IllegalStateException If a subclass calls this constructor.
+      */
+    public CheckFieldAdapter(final FieldVisitor fieldVisitor) {
+        this(/* latest api = */ Opcodes.ASM9, fieldVisitor);
+        if (getClass() != CheckFieldAdapter.class) {
+            throw new IllegalStateException();
+        }
+    }
+
+    /**
+      * Constructs a new {@link CheckFieldAdapter}.
+      *
+      * @param api the ASM API version implemented by this visitor. Must be one of the {@code
+      *     ASM}<i>x</i> values in {@link Opcodes}.
+      * @param fieldVisitor the field visitor to which this adapter must delegate calls.
+      */
+    protected CheckFieldAdapter(final int api, final FieldVisitor fieldVisitor) {
+        super(api, fieldVisitor);
+    }
+
+    @Override
+    public AnnotationVisitor visitAnnotation(final String descriptor, final boolean visible) {
+        checkVisitEndNotCalled();
+        // Annotations can only appear in V1_5 or more classes.
+        CheckMethodAdapter.checkDescriptor(Opcodes.V1_5, descriptor, false);
+        return new CheckAnnotationAdapter(super.visitAnnotation(descriptor, visible));
+    }
+
+    @Override
+    public AnnotationVisitor visitTypeAnnotation(
+            final int typeRef, final TypePath typePath, final String descriptor, final boolean visible) {
+        checkVisitEndNotCalled();
+        int sort = new TypeReference(typeRef).getSort();
+        if (sort != TypeReference.FIELD) {
+            throw new IllegalArgumentException(
+                    "Invalid type reference sort 0x" + Integer.toHexString(sort));
+        }
+        CheckClassAdapter.checkTypeRef(typeRef);
+        CheckMethodAdapter.checkDescriptor(Opcodes.V1_5, descriptor, false);
+        return new CheckAnnotationAdapter(
+                super.visitTypeAnnotation(typeRef, typePath, descriptor, visible));
+    }
+
+    @Override
+    public void visitAttribute(final Attribute attribute) {
+        checkVisitEndNotCalled();
+        if (attribute == null) {
+            throw new IllegalArgumentException("Invalid attribute (must not be null)");
+        }
+        super.visitAttribute(attribute);
+    }
+
+    @Override
+    public void visitEnd() {
+        checkVisitEndNotCalled();
+        visitEndCalled = true;
+        super.visitEnd();
+    }
+
+    private void checkVisitEndNotCalled() {
+        if (visitEndCalled) {
+            throw new IllegalStateException("Cannot call a visit method after visitEnd has been called");
+        }
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/org/objectweb/asm/util/CheckFrameAnalyzer.class b/tests/test_data/std/jdk/internal/org/objectweb/asm/util/CheckFrameAnalyzer.class
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diff --git a/tests/test_data/std/jdk/internal/org/objectweb/asm/util/CheckFrameAnalyzer.java b/tests/test_data/std/jdk/internal/org/objectweb/asm/util/CheckFrameAnalyzer.java
new file mode 100644
index 00000000..754f648a
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/org/objectweb/asm/util/CheckFrameAnalyzer.java
@@ -0,0 +1,513 @@
+/*
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/*
+ * This file is available under and governed by the GNU General Public
+ * License version 2 only, as published by the Free Software Foundation.
+ * However, the following notice accompanied the original version of this
+ * file:
+ *
+ * ASM: a very small and fast Java bytecode manipulation framework
+ * Copyright (c) 2000-2011 INRIA, France Telecom
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the copyright holders nor the names of its
+ *    contributors may be used to endorse or promote products derived from
+ *    this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+package jdk.internal.org.objectweb.asm.util;
+
+import java.util.Collections;
+import java.util.List;
+import jdk.internal.org.objectweb.asm.Opcodes;
+import jdk.internal.org.objectweb.asm.Type;
+import jdk.internal.org.objectweb.asm.tree.AbstractInsnNode;
+import jdk.internal.org.objectweb.asm.tree.FrameNode;
+import jdk.internal.org.objectweb.asm.tree.InsnList;
+import jdk.internal.org.objectweb.asm.tree.InsnNode;
+import jdk.internal.org.objectweb.asm.tree.JumpInsnNode;
+import jdk.internal.org.objectweb.asm.tree.LabelNode;
+import jdk.internal.org.objectweb.asm.tree.LookupSwitchInsnNode;
+import jdk.internal.org.objectweb.asm.tree.MethodNode;
+import jdk.internal.org.objectweb.asm.tree.TableSwitchInsnNode;
+import jdk.internal.org.objectweb.asm.tree.TryCatchBlockNode;
+import jdk.internal.org.objectweb.asm.tree.TypeInsnNode;
+import jdk.internal.org.objectweb.asm.tree.analysis.Analyzer;
+import jdk.internal.org.objectweb.asm.tree.analysis.AnalyzerException;
+import jdk.internal.org.objectweb.asm.tree.analysis.Frame;
+import jdk.internal.org.objectweb.asm.tree.analysis.Interpreter;
+import jdk.internal.org.objectweb.asm.tree.analysis.Value;
+
+/**
+ * An {@link Analyzer} subclass which checks that methods provide stack map frames where expected
+ * (i.e. at jump target and after instructions without immediate successor), and that these stack
+ * map frames are valid (for the provided interpreter; they may still be invalid for the JVM, if the
+ * {@link Interpreter} uses a simplified type system compared to the JVM verifier). This is done in
+ * two steps:
+ *
+ * <ul>
+ *   <li>First, the stack map frames in {@link FrameNode}s are expanded, and stored at their
+ *       respective instruction offsets. The expansion process uncompresses the APPEND, CHOP and
+ *       SAME frames to FULL frames. It also converts the stack map frame verification types to
+ *       {@link Value}s, via the provided {@link Interpreter}. The expansion is done in {@link
+ *       #expandFrames}, by looking at each {@link FrameNode} in sequence (compressed frames are
+ *       defined relatively to the previous {@link FrameNode}, or the implicit first frame). The
+ *       actual decompression is done in {@link #expandFrame}, and the type conversion in {@link
+ *       #newFrameValue}.
+ *   <li>Next, the method instructions are checked in sequence. Starting from the implicit initial
+ *       frame, the execution of each instruction <em>i</em> is simulated on the current stack map
+ *       frame, with the {@link Frame#execute} method. This gives a new stack map frame <em>f</em>,
+ *       representing the stack map frame state after the execution of <em>i</em>. Then:
+ *       <ul>
+ *         <li>If there is a next instruction and if the control flow cannot continue to it (e.g. if
+ *             <em>i</em> is a RETURN or an ATHROW, for instance): an existing stack map frame
+ *             <em>f0</em> (coming from the first step) is expected after <em>i</em>.
+ *         <li>If there is a next instruction and if the control flow can continue to it (e.g. if
+ *             <em>i</em> is a ALOAD, for instance): either there an existing stack map frame
+ *             <em>f0</em> (coming from the first step) after <em>i</em>, or there is none. In the
+ *             first case <em>f</em> and <em>f0</em> must be <em>compatible</em>: the types in
+ *             <em>f</em> must be sub types of the corresponding types in the existing frame
+ *             <em>f0</em> (otherwise an exception is thrown). In the second case, <em>f0</em> is
+ *             simply set to the value of <em>f</em>.
+ *         <li>If the control flow can continue to some instruction <em>j</em> (e.g. if <em>i</em>
+ *             is an IF_EQ, for instance): an existing stack map frame <em>f0</em> (coming from the
+ *             first step) is expected at <em>j</em>, which must be compatible with <em>f</em> (as
+ *             defined previously).
+ *       </ul>
+ *       The sequential loop over the instructions is done in {@link #init}, which is called from
+ *       the {@link Analyzer#analyze} method. Cases where the control flow cannot continue to the
+ *       next instruction are handled in {@link #endControlFlow}. Cases where the control flow can
+ *       continue to the next instruction, or jump to another instruction, are handled in {@link
+ *       #checkFrame}. This method checks that an existing stack map frame is present when required,
+ *       and checks the stack map frames compatibility with {@link #checkMerge}.
+ * </ul>
+ *
+ * @author Eric Bruneton
+ * @param <V> type of the {@link Value} used for the analysis.
+ */
+class CheckFrameAnalyzer<V extends Value> extends Analyzer<V> {
+
+    /** The interpreter to use to symbolically interpret the bytecode instructions. */
+    private final Interpreter<V> interpreter;
+
+    /** The instructions of the currently analyzed method. */
+    private InsnList insnList;
+
+    /**
+      * The number of locals in the last stack map frame processed by {@link expandFrame}. Long and
+      * double values are represented with two elements.
+      */
+    private int currentLocals;
+
+    CheckFrameAnalyzer(final Interpreter<V> interpreter) {
+        super(interpreter);
+        this.interpreter = interpreter;
+    }
+
+    @Override
+    protected void init(final String owner, final MethodNode method) throws AnalyzerException {
+        insnList = method.instructions;
+        currentLocals = Type.getArgumentsAndReturnSizes(method.desc) >> 2;
+        if ((method.access & Opcodes.ACC_STATIC) != 0) {
+            currentLocals -= 1;
+        }
+
+        Frame<V>[] frames = getFrames();
+        Frame<V> currentFrame = frames[0];
+        expandFrames(owner, method, currentFrame);
+        for (int insnIndex = 0; insnIndex < insnList.size(); ++insnIndex) {
+            Frame<V> oldFrame = frames[insnIndex];
+
+            // Simulate the execution of this instruction.
+            AbstractInsnNode insnNode = null;
+            try {
+                insnNode = method.instructions.get(insnIndex);
+                int insnOpcode = insnNode.getOpcode();
+                int insnType = insnNode.getType();
+
+                if (insnType == AbstractInsnNode.LABEL
+                        || insnType == AbstractInsnNode.LINE
+                        || insnType == AbstractInsnNode.FRAME) {
+                    checkFrame(insnIndex + 1, oldFrame, /* requireFrame = */ false);
+                } else {
+                    currentFrame.init(oldFrame).execute(insnNode, interpreter);
+
+                    if (insnNode instanceof JumpInsnNode) {
+                        if (insnOpcode == JSR) {
+                            throw new AnalyzerException(insnNode, "JSR instructions are unsupported");
+                        }
+                        JumpInsnNode jumpInsn = (JumpInsnNode) insnNode;
+                        int targetInsnIndex = insnList.indexOf(jumpInsn.label);
+                        checkFrame(targetInsnIndex, currentFrame, /* requireFrame = */ true);
+                        if (insnOpcode == GOTO) {
+                            endControlFlow(insnIndex);
+                        } else {
+                            checkFrame(insnIndex + 1, currentFrame, /* requireFrame = */ false);
+                        }
+                    } else if (insnNode instanceof LookupSwitchInsnNode) {
+                        LookupSwitchInsnNode lookupSwitchInsn = (LookupSwitchInsnNode) insnNode;
+                        int targetInsnIndex = insnList.indexOf(lookupSwitchInsn.dflt);
+                        checkFrame(targetInsnIndex, currentFrame, /* requireFrame = */ true);
+                        for (int i = 0; i < lookupSwitchInsn.labels.size(); ++i) {
+                            LabelNode label = lookupSwitchInsn.labels.get(i);
+                            targetInsnIndex = insnList.indexOf(label);
+                            currentFrame.initJumpTarget(insnOpcode, label);
+                            checkFrame(targetInsnIndex, currentFrame, /* requireFrame = */ true);
+                        }
+                        endControlFlow(insnIndex);
+                    } else if (insnNode instanceof TableSwitchInsnNode) {
+                        TableSwitchInsnNode tableSwitchInsn = (TableSwitchInsnNode) insnNode;
+                        int targetInsnIndex = insnList.indexOf(tableSwitchInsn.dflt);
+                        currentFrame.initJumpTarget(insnOpcode, tableSwitchInsn.dflt);
+                        checkFrame(targetInsnIndex, currentFrame, /* requireFrame = */ true);
+                        newControlFlowEdge(insnIndex, targetInsnIndex);
+                        for (int i = 0; i < tableSwitchInsn.labels.size(); ++i) {
+                            LabelNode label = tableSwitchInsn.labels.get(i);
+                            currentFrame.initJumpTarget(insnOpcode, label);
+                            targetInsnIndex = insnList.indexOf(label);
+                            checkFrame(targetInsnIndex, currentFrame, /* requireFrame = */ true);
+                        }
+                        endControlFlow(insnIndex);
+                    } else if (insnOpcode == RET) {
+                        throw new AnalyzerException(insnNode, "RET instructions are unsupported");
+                    } else if (insnOpcode != ATHROW && (insnOpcode < IRETURN || insnOpcode > RETURN)) {
+                        checkFrame(insnIndex + 1, currentFrame, /* requireFrame = */ false);
+                    } else {
+                        endControlFlow(insnIndex);
+                    }
+                }
+
+                List<TryCatchBlockNode> insnHandlers = getHandlers(insnIndex);
+                if (insnHandlers != null) {
+                    for (TryCatchBlockNode tryCatchBlock : insnHandlers) {
+                        Type catchType;
+                        if (tryCatchBlock.type == null) {
+                            catchType = Type.getObjectType("java/lang/Throwable");
+                        } else {
+                            catchType = Type.getObjectType(tryCatchBlock.type);
+                        }
+                        Frame<V> handler = newFrame(oldFrame);
+                        handler.clearStack();
+                        handler.push(interpreter.newExceptionValue(tryCatchBlock, handler, catchType));
+                        checkFrame(insnList.indexOf(tryCatchBlock.handler), handler, /* requireFrame = */ true);
+                    }
+                }
+
+                if (!hasNextJvmInsnOrFrame(insnIndex)) {
+                    break;
+                }
+            } catch (AnalyzerException e) {
+                throw new AnalyzerException(
+                        e.node, "Error at instruction " + insnIndex + ": " + e.getMessage(), e);
+            } catch (RuntimeException e) {
+                // DontCheck(IllegalCatch): can't be fixed, for backward compatibility.
+                throw new AnalyzerException(
+                        insnNode, "Error at instruction " + insnIndex + ": " + e.getMessage(), e);
+            }
+        }
+    }
+
+    /**
+      * Expands the {@link FrameNode} "instructions" of the given method into {@link Frame} objects and
+      * stores them at the corresponding indices of the {@link #frames} array. The expanded frames are
+      * also associated with the label and line number nodes immediately preceding each frame node.
+      *
+      * @param owner the internal name of the class to which 'method' belongs.
+      * @param method the method whose frames must be expanded.
+      * @param initialFrame the implicit initial frame of 'method'.
+      * @throws AnalyzerException if the stack map frames of 'method', i.e. its FrameNode
+      *     "instructions", are invalid.
+      */
+    private void expandFrames(
+            final String owner, final MethodNode method, final Frame<V> initialFrame)
+            throws AnalyzerException {
+        int lastJvmOrFrameInsnIndex = -1;
+        Frame<V> currentFrame = initialFrame;
+        int currentInsnIndex = 0;
+        for (AbstractInsnNode insnNode : method.instructions) {
+            if (insnNode instanceof FrameNode) {
+                try {
+                    currentFrame = expandFrame(owner, currentFrame, (FrameNode) insnNode);
+                } catch (AnalyzerException e) {
+                    throw new AnalyzerException(
+                            e.node, "Error at instruction " + currentInsnIndex + ": " + e.getMessage(), e);
+                }
+                for (int index = lastJvmOrFrameInsnIndex + 1; index <= currentInsnIndex; ++index) {
+                    getFrames()[index] = currentFrame;
+                }
+            }
+            if (isJvmInsnNode(insnNode) || insnNode instanceof FrameNode) {
+                lastJvmOrFrameInsnIndex = currentInsnIndex;
+            }
+            currentInsnIndex += 1;
+        }
+    }
+
+    /**
+      * Returns the expanded representation of the given {@link FrameNode}.
+      *
+      * @param owner the internal name of the class to which 'frameNode' belongs.
+      * @param previousFrame the frame before 'frameNode', in expanded form.
+      * @param frameNode a possibly compressed stack map frame.
+      * @return the expanded version of 'frameNode'.
+      * @throws AnalyzerException if 'frameNode' is invalid.
+      */
+    @SuppressWarnings("fallthrough")
+    private Frame<V> expandFrame(
+            final String owner, final Frame<V> previousFrame, final FrameNode frameNode)
+            throws AnalyzerException {
+        Frame<V> frame = newFrame(previousFrame);
+        List<Object> locals = frameNode.local == null ? Collections.emptyList() : frameNode.local;
+        int currentLocal = currentLocals;
+        switch (frameNode.type) {
+            case Opcodes.F_NEW:
+            case Opcodes.F_FULL:
+                currentLocal = 0;
+                // fall through
+            case Opcodes.F_APPEND:
+                for (Object type : locals) {
+                    V value = newFrameValue(owner, frameNode, type);
+                    if (currentLocal + value.getSize() > frame.getLocals()) {
+                        throw new AnalyzerException(frameNode, "Cannot append more locals than maxLocals");
+                    }
+                    frame.setLocal(currentLocal++, value);
+                    if (value.getSize() == 2) {
+                        frame.setLocal(currentLocal++, interpreter.newValue(null));
+                    }
+                }
+                break;
+            case Opcodes.F_CHOP:
+                for (Object unusedType : locals) {
+                    if (currentLocal <= 0) {
+                        throw new AnalyzerException(frameNode, "Cannot chop more locals than defined");
+                    }
+                    if (currentLocal > 1 && frame.getLocal(currentLocal - 2).getSize() == 2) {
+                        currentLocal -= 2;
+                    } else {
+                        currentLocal -= 1;
+                    }
+                }
+                break;
+            case Opcodes.F_SAME:
+            case Opcodes.F_SAME1:
+                break;
+            default:
+                throw new AnalyzerException(frameNode, "Illegal frame type " + frameNode.type);
+        }
+        currentLocals = currentLocal;
+        while (currentLocal < frame.getLocals()) {
+            frame.setLocal(currentLocal++, interpreter.newValue(null));
+        }
+
+        List<Object> stack = frameNode.stack == null ? Collections.emptyList() : frameNode.stack;
+        frame.clearStack();
+        for (Object type : stack) {
+            frame.push(newFrameValue(owner, frameNode, type));
+        }
+        return frame;
+    }
+
+    /**
+      * Creates a new {@link Value} that represents the given stack map frame type.
+      *
+      * @param owner the internal name of the class to which 'frameNode' belongs.
+      * @param frameNode the stack map frame to which 'type' belongs.
+      * @param type an Integer, String or LabelNode object representing a primitive, reference or
+      *     uninitialized a stack map frame type, respectively. See {@link FrameNode}.
+      * @return a value that represents the given type.
+      * @throws AnalyzerException if 'type' is an invalid stack map frame type.
+      */
+    private V newFrameValue(final String owner, final FrameNode frameNode, final Object type)
+            throws AnalyzerException {
+        if (type == Opcodes.TOP) {
+            return interpreter.newValue(null);
+        } else if (type == Opcodes.INTEGER) {
+            return interpreter.newValue(Type.INT_TYPE);
+        } else if (type == Opcodes.FLOAT) {
+            return interpreter.newValue(Type.FLOAT_TYPE);
+        } else if (type == Opcodes.LONG) {
+            return interpreter.newValue(Type.LONG_TYPE);
+        } else if (type == Opcodes.DOUBLE) {
+            return interpreter.newValue(Type.DOUBLE_TYPE);
+        } else if (type == Opcodes.NULL) {
+            return interpreter.newOperation(new InsnNode(Opcodes.ACONST_NULL));
+        } else if (type == Opcodes.UNINITIALIZED_THIS) {
+            return interpreter.newValue(Type.getObjectType(owner));
+        } else if (type instanceof String) {
+            return interpreter.newValue(Type.getObjectType((String) type));
+        } else if (type instanceof LabelNode) {
+            AbstractInsnNode referencedNode = (LabelNode) type;
+            while (referencedNode != null && !isJvmInsnNode(referencedNode)) {
+                referencedNode = referencedNode.getNext();
+            }
+            if (referencedNode == null || referencedNode.getOpcode() != Opcodes.NEW) {
+                throw new AnalyzerException(frameNode, "LabelNode does not designate a NEW instruction");
+            }
+            return interpreter.newValue(Type.getObjectType(((TypeInsnNode) referencedNode).desc));
+        }
+        throw new AnalyzerException(frameNode, "Illegal stack map frame value " + type);
+    }
+
+    /**
+      * Checks that the given frame is compatible with the frame at the given instruction index, if
+      * any. If there is no frame at this instruction index and none is required, the frame at
+      * 'insnIndex' is set to the given frame. Otherwise, if the merge of the two frames is not equal
+      * to the current frame at 'insnIndex', an exception is thrown.
+      *
+      * @param insnIndex an instruction index.
+      * @param frame a frame. This frame is left unchanged by this method.
+      * @param requireFrame whether a frame must already exist or not in {@link #frames} at
+      *     'insnIndex'.
+      * @throws AnalyzerException if the frames have incompatible sizes or if the frame at 'insnIndex'
+      *     is missing (if required) or not compatible with 'frame'.
+      */
+    private void checkFrame(final int insnIndex, final Frame<V> frame, final boolean requireFrame)
+            throws AnalyzerException {
+        Frame<V> oldFrame = getFrames()[insnIndex];
+        if (oldFrame == null) {
+            if (requireFrame) {
+                throw new AnalyzerException(null, "Expected stack map frame at instruction " + insnIndex);
+            }
+            getFrames()[insnIndex] = newFrame(frame);
+        } else {
+            String error = checkMerge(frame, oldFrame);
+            if (error != null) {
+                throw new AnalyzerException(
+                        null,
+                        "Stack map frame incompatible with frame at instruction "
+                                + insnIndex
+                                + " ("
+                                + error
+                                + ")");
+            }
+        }
+    }
+
+    /**
+      * Checks that merging the two given frames would not produce any change, i.e. that the types in
+      * the source frame are sub types of the corresponding types in the destination frame.
+      *
+      * @param srcFrame a source frame. This frame is left unchanged by this method.
+      * @param dstFrame a destination frame. This frame is left unchanged by this method.
+      * @return an error message if the frames have incompatible sizes, or if a type in the source
+      *     frame is not a sub type of the corresponding type in the destination frame. Returns
+      *     {@literal null} otherwise.
+      */
+    private String checkMerge(final Frame<V> srcFrame, final Frame<V> dstFrame) {
+        int numLocals = srcFrame.getLocals();
+        if (numLocals != dstFrame.getLocals()) {
+            throw new AssertionError();
+        }
+        for (int i = 0; i < numLocals; ++i) {
+            V v = interpreter.merge(srcFrame.getLocal(i), dstFrame.getLocal(i));
+            if (!v.equals(dstFrame.getLocal(i))) {
+                return "incompatible types at local "
+                        + i
+                        + ": "
+                        + srcFrame.getLocal(i)
+                        + " and "
+                        + dstFrame.getLocal(i);
+            }
+        }
+        int numStack = srcFrame.getStackSize();
+        if (numStack != dstFrame.getStackSize()) {
+            return "incompatible stack heights";
+        }
+        for (int i = 0; i < numStack; ++i) {
+            V v = interpreter.merge(srcFrame.getStack(i), dstFrame.getStack(i));
+            if (!v.equals(dstFrame.getStack(i))) {
+                return "incompatible types at stack item "
+                        + i
+                        + ": "
+                        + srcFrame.getStack(i)
+                        + " and "
+                        + dstFrame.getStack(i);
+            }
+        }
+        return null;
+    }
+
+    /**
+      * Ends the control flow graph at the given instruction. This method checks that there is an
+      * existing frame for the next instruction, if any.
+      *
+      * @param insnIndex an instruction index.
+      * @throws AnalyzerException if 'insnIndex' is not the last instruction and there is no frame at
+      *     'insnIndex' + 1 in {@link #getFrames}.
+      */
+    private void endControlFlow(final int insnIndex) throws AnalyzerException {
+        if (hasNextJvmInsnOrFrame(insnIndex) && getFrames()[insnIndex + 1] == null) {
+            throw new AnalyzerException(
+                    null, "Expected stack map frame at instruction " + (insnIndex + 1));
+        }
+    }
+
+    /**
+      * Returns true if the given instruction is followed by a JVM instruction or a by stack map frame.
+      *
+      * @param insnIndex an instruction index.
+      * @return true if 'insnIndex' is followed by a JVM instruction or a by stack map frame.
+      */
+    private boolean hasNextJvmInsnOrFrame(final int insnIndex) {
+        AbstractInsnNode insn = insnList.get(insnIndex).getNext();
+        while (insn != null) {
+            if (isJvmInsnNode(insn) || insn instanceof FrameNode) {
+                return true;
+            }
+            insn = insn.getNext();
+        }
+        return false;
+    }
+
+    /**
+      * Returns true if the given instruction node corresponds to a real JVM instruction.
+      *
+      * @param insnNode an instruction node.
+      * @return true except for label, line number and stack map frame nodes.
+      */
+    private static boolean isJvmInsnNode(final AbstractInsnNode insnNode) {
+        return insnNode.getOpcode() >= 0;
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/org/objectweb/asm/util/CheckMethodAdapter$1.class b/tests/test_data/std/jdk/internal/org/objectweb/asm/util/CheckMethodAdapter$1.class
new file mode 100644
index 0000000000000000000000000000000000000000..f9833c3c1bca87375ecb9e8a6ae45d0cb29c13b0
GIT binary patch
literal 4104
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HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/org/objectweb/asm/util/CheckMethodAdapter$Method.class b/tests/test_data/std/jdk/internal/org/objectweb/asm/util/CheckMethodAdapter$Method.class
new file mode 100644
index 0000000000000000000000000000000000000000..dc038b7ea2b4e61cea632cbd04102eb19d1ed542
GIT binary patch
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HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/org/objectweb/asm/util/CheckMethodAdapter$MethodWriterWrapper.class b/tests/test_data/std/jdk/internal/org/objectweb/asm/util/CheckMethodAdapter$MethodWriterWrapper.class
new file mode 100644
index 0000000000000000000000000000000000000000..7c36d8c39552e2161ce23d6e3391e1a3700e27df
GIT binary patch
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HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/org/objectweb/asm/util/CheckMethodAdapter.class b/tests/test_data/std/jdk/internal/org/objectweb/asm/util/CheckMethodAdapter.class
new file mode 100644
index 0000000000000000000000000000000000000000..2307e0b7507e5d3bd4fb040f0c3380e9373c57e4
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HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/org/objectweb/asm/util/CheckMethodAdapter.java b/tests/test_data/std/jdk/internal/org/objectweb/asm/util/CheckMethodAdapter.java
new file mode 100644
index 00000000..59c41108
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/org/objectweb/asm/util/CheckMethodAdapter.java
@@ -0,0 +1,1519 @@
+/*
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/*
+ * This file is available under and governed by the GNU General Public
+ * License version 2 only, as published by the Free Software Foundation.
+ * However, the following notice accompanied the original version of this
+ * file:
+ *
+ * ASM: a very small and fast Java bytecode manipulation framework
+ * Copyright (c) 2000-2011 INRIA, France Telecom
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the copyright holders nor the names of its
+ *    contributors may be used to endorse or promote products derived from
+ *    this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+package jdk.internal.org.objectweb.asm.util;
+
+import java.io.PrintWriter;
+import java.io.StringWriter;
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.HashSet;
+import java.util.List;
+import java.util.Map;
+import java.util.Set;
+import jdk.internal.org.objectweb.asm.AnnotationVisitor;
+import jdk.internal.org.objectweb.asm.Attribute;
+import jdk.internal.org.objectweb.asm.ClassWriter;
+import jdk.internal.org.objectweb.asm.ConstantDynamic;
+import jdk.internal.org.objectweb.asm.Handle;
+import jdk.internal.org.objectweb.asm.Label;
+import jdk.internal.org.objectweb.asm.MethodVisitor;
+import jdk.internal.org.objectweb.asm.Opcodes;
+import jdk.internal.org.objectweb.asm.Type;
+import jdk.internal.org.objectweb.asm.TypePath;
+import jdk.internal.org.objectweb.asm.TypeReference;
+import jdk.internal.org.objectweb.asm.tree.MethodNode;
+import jdk.internal.org.objectweb.asm.tree.analysis.Analyzer;
+import jdk.internal.org.objectweb.asm.tree.analysis.AnalyzerException;
+import jdk.internal.org.objectweb.asm.tree.analysis.BasicValue;
+import jdk.internal.org.objectweb.asm.tree.analysis.BasicVerifier;
+
+/**
+ * A {@link MethodVisitor} that checks that its methods are properly used. More precisely this
+ * method adapter checks each instruction individually, i.e., each visit method checks some
+ * preconditions based <i>only</i> on its arguments - such as the fact that the given opcode is
+ * correct for a given visit method. This adapter can also perform some basic data flow checks (more
+ * precisely those that can be performed without the full class hierarchy - see {@link
+ * jdk.internal.org.objectweb.asm.tree.analysis.BasicVerifier}). For instance in a method whose signature is
+ * {@code void m ()}, the invalid instruction IRETURN, or the invalid sequence IADD L2I will be
+ * detected if the data flow checks are enabled. These checks are enabled by using the {@link
+ * #CheckMethodAdapter(int,String,String,MethodVisitor,Map)} constructor. They are not performed if
+ * any other constructor is used.
+ *
+ * @author Eric Bruneton
+ */
+public class CheckMethodAdapter extends MethodVisitor {
+
+    /** The 'generic' instruction visit methods (i.e. those that take an opcode argument). */
+    private enum Method {
+        VISIT_INSN,
+        VISIT_INT_INSN,
+        VISIT_VAR_INSN,
+        VISIT_TYPE_INSN,
+        VISIT_FIELD_INSN,
+        VISIT_METHOD_INSN,
+        VISIT_JUMP_INSN
+    }
+
+    /** The method to use to visit each instruction. Only generic methods are represented here. */
+    private static final Method[] OPCODE_METHODS = {
+        Method.VISIT_INSN, // NOP
+        Method.VISIT_INSN, // ACONST_NULL
+        Method.VISIT_INSN, // ICONST_M1
+        Method.VISIT_INSN, // ICONST_0
+        Method.VISIT_INSN, // ICONST_1
+        Method.VISIT_INSN, // ICONST_2
+        Method.VISIT_INSN, // ICONST_3
+        Method.VISIT_INSN, // ICONST_4
+        Method.VISIT_INSN, // ICONST_5
+        Method.VISIT_INSN, // LCONST_0
+        Method.VISIT_INSN, // LCONST_1
+        Method.VISIT_INSN, // FCONST_0
+        Method.VISIT_INSN, // FCONST_1
+        Method.VISIT_INSN, // FCONST_2
+        Method.VISIT_INSN, // DCONST_0
+        Method.VISIT_INSN, // DCONST_1
+        Method.VISIT_INT_INSN, // BIPUSH
+        Method.VISIT_INT_INSN, // SIPUSH
+        null, // LDC
+        null, // LDC_W
+        null, // LDC2_W
+        Method.VISIT_VAR_INSN, // ILOAD
+        Method.VISIT_VAR_INSN, // LLOAD
+        Method.VISIT_VAR_INSN, // FLOAD
+        Method.VISIT_VAR_INSN, // DLOAD
+        Method.VISIT_VAR_INSN, // ALOAD
+        null, // ILOAD_0
+        null, // ILOAD_1
+        null, // ILOAD_2
+        null, // ILOAD_3
+        null, // LLOAD_0
+        null, // LLOAD_1
+        null, // LLOAD_2
+        null, // LLOAD_3
+        null, // FLOAD_0
+        null, // FLOAD_1
+        null, // FLOAD_2
+        null, // FLOAD_3
+        null, // DLOAD_0
+        null, // DLOAD_1
+        null, // DLOAD_2
+        null, // DLOAD_3
+        null, // ALOAD_0
+        null, // ALOAD_1
+        null, // ALOAD_2
+        null, // ALOAD_3
+        Method.VISIT_INSN, // IALOAD
+        Method.VISIT_INSN, // LALOAD
+        Method.VISIT_INSN, // FALOAD
+        Method.VISIT_INSN, // DALOAD
+        Method.VISIT_INSN, // AALOAD
+        Method.VISIT_INSN, // BALOAD
+        Method.VISIT_INSN, // CALOAD
+        Method.VISIT_INSN, // SALOAD
+        Method.VISIT_VAR_INSN, // ISTORE
+        Method.VISIT_VAR_INSN, // LSTORE
+        Method.VISIT_VAR_INSN, // FSTORE
+        Method.VISIT_VAR_INSN, // DSTORE
+        Method.VISIT_VAR_INSN, // ASTORE
+        null, // ISTORE_0
+        null, // ISTORE_1
+        null, // ISTORE_2
+        null, // ISTORE_3
+        null, // LSTORE_0
+        null, // LSTORE_1
+        null, // LSTORE_2
+        null, // LSTORE_3
+        null, // FSTORE_0
+        null, // FSTORE_1
+        null, // FSTORE_2
+        null, // FSTORE_3
+        null, // DSTORE_0
+        null, // DSTORE_1
+        null, // DSTORE_2
+        null, // DSTORE_3
+        null, // ASTORE_0
+        null, // ASTORE_1
+        null, // ASTORE_2
+        null, // ASTORE_3
+        Method.VISIT_INSN, // IASTORE
+        Method.VISIT_INSN, // LASTORE
+        Method.VISIT_INSN, // FASTORE
+        Method.VISIT_INSN, // DASTORE
+        Method.VISIT_INSN, // AASTORE
+        Method.VISIT_INSN, // BASTORE
+        Method.VISIT_INSN, // CASTORE
+        Method.VISIT_INSN, // SASTORE
+        Method.VISIT_INSN, // POP
+        Method.VISIT_INSN, // POP2
+        Method.VISIT_INSN, // DUP
+        Method.VISIT_INSN, // DUP_X1
+        Method.VISIT_INSN, // DUP_X2
+        Method.VISIT_INSN, // DUP2
+        Method.VISIT_INSN, // DUP2_X1
+        Method.VISIT_INSN, // DUP2_X2
+        Method.VISIT_INSN, // SWAP
+        Method.VISIT_INSN, // IADD
+        Method.VISIT_INSN, // LADD
+        Method.VISIT_INSN, // FADD
+        Method.VISIT_INSN, // DADD
+        Method.VISIT_INSN, // ISUB
+        Method.VISIT_INSN, // LSUB
+        Method.VISIT_INSN, // FSUB
+        Method.VISIT_INSN, // DSUB
+        Method.VISIT_INSN, // IMUL
+        Method.VISIT_INSN, // LMUL
+        Method.VISIT_INSN, // FMUL
+        Method.VISIT_INSN, // DMUL
+        Method.VISIT_INSN, // IDIV
+        Method.VISIT_INSN, // LDIV
+        Method.VISIT_INSN, // FDIV
+        Method.VISIT_INSN, // DDIV
+        Method.VISIT_INSN, // IREM
+        Method.VISIT_INSN, // LREM
+        Method.VISIT_INSN, // FREM
+        Method.VISIT_INSN, // DREM
+        Method.VISIT_INSN, // INEG
+        Method.VISIT_INSN, // LNEG
+        Method.VISIT_INSN, // FNEG
+        Method.VISIT_INSN, // DNEG
+        Method.VISIT_INSN, // ISHL
+        Method.VISIT_INSN, // LSHL
+        Method.VISIT_INSN, // ISHR
+        Method.VISIT_INSN, // LSHR
+        Method.VISIT_INSN, // IUSHR
+        Method.VISIT_INSN, // LUSHR
+        Method.VISIT_INSN, // IAND
+        Method.VISIT_INSN, // LAND
+        Method.VISIT_INSN, // IOR
+        Method.VISIT_INSN, // LOR
+        Method.VISIT_INSN, // IXOR
+        Method.VISIT_INSN, // LXOR
+        null, // IINC
+        Method.VISIT_INSN, // I2L
+        Method.VISIT_INSN, // I2F
+        Method.VISIT_INSN, // I2D
+        Method.VISIT_INSN, // L2I
+        Method.VISIT_INSN, // L2F
+        Method.VISIT_INSN, // L2D
+        Method.VISIT_INSN, // F2I
+        Method.VISIT_INSN, // F2L
+        Method.VISIT_INSN, // F2D
+        Method.VISIT_INSN, // D2I
+        Method.VISIT_INSN, // D2L
+        Method.VISIT_INSN, // D2F
+        Method.VISIT_INSN, // I2B
+        Method.VISIT_INSN, // I2C
+        Method.VISIT_INSN, // I2S
+        Method.VISIT_INSN, // LCMP
+        Method.VISIT_INSN, // FCMPL
+        Method.VISIT_INSN, // FCMPG
+        Method.VISIT_INSN, // DCMPL
+        Method.VISIT_INSN, // DCMPG
+        Method.VISIT_JUMP_INSN, // IFEQ
+        Method.VISIT_JUMP_INSN, // IFNE
+        Method.VISIT_JUMP_INSN, // IFLT
+        Method.VISIT_JUMP_INSN, // IFGE
+        Method.VISIT_JUMP_INSN, // IFGT
+        Method.VISIT_JUMP_INSN, // IFLE
+        Method.VISIT_JUMP_INSN, // IF_ICMPEQ
+        Method.VISIT_JUMP_INSN, // IF_ICMPNE
+        Method.VISIT_JUMP_INSN, // IF_ICMPLT
+        Method.VISIT_JUMP_INSN, // IF_ICMPGE
+        Method.VISIT_JUMP_INSN, // IF_ICMPGT
+        Method.VISIT_JUMP_INSN, // IF_ICMPLE
+        Method.VISIT_JUMP_INSN, // IF_ACMPEQ
+        Method.VISIT_JUMP_INSN, // IF_ACMPNE
+        Method.VISIT_JUMP_INSN, // GOTO
+        Method.VISIT_JUMP_INSN, // JSR
+        Method.VISIT_VAR_INSN, // RET
+        null, // TABLESWITCH
+        null, // LOOKUPSWITCH
+        Method.VISIT_INSN, // IRETURN
+        Method.VISIT_INSN, // LRETURN
+        Method.VISIT_INSN, // FRETURN
+        Method.VISIT_INSN, // DRETURN
+        Method.VISIT_INSN, // ARETURN
+        Method.VISIT_INSN, // RETURN
+        Method.VISIT_FIELD_INSN, // GETSTATIC
+        Method.VISIT_FIELD_INSN, // PUTSTATIC
+        Method.VISIT_FIELD_INSN, // GETFIELD
+        Method.VISIT_FIELD_INSN, // PUTFIELD
+        Method.VISIT_METHOD_INSN, // INVOKEVIRTUAL
+        Method.VISIT_METHOD_INSN, // INVOKESPECIAL
+        Method.VISIT_METHOD_INSN, // INVOKESTATIC
+        Method.VISIT_METHOD_INSN, // INVOKEINTERFACE
+        null, // INVOKEDYNAMIC
+        Method.VISIT_TYPE_INSN, // NEW
+        Method.VISIT_INT_INSN, // NEWARRAY
+        Method.VISIT_TYPE_INSN, // ANEWARRAY
+        Method.VISIT_INSN, // ARRAYLENGTH
+        Method.VISIT_INSN, // ATHROW
+        Method.VISIT_TYPE_INSN, // CHECKCAST
+        Method.VISIT_TYPE_INSN, // INSTANCEOF
+        Method.VISIT_INSN, // MONITORENTER
+        Method.VISIT_INSN, // MONITOREXIT
+        null, // WIDE
+        null, // MULTIANEWARRAY
+        Method.VISIT_JUMP_INSN, // IFNULL
+        Method.VISIT_JUMP_INSN // IFNONNULL
+    };
+
+    private static final String INVALID = "Invalid ";
+    private static final String INVALID_DESCRIPTOR = "Invalid descriptor: ";
+    private static final String INVALID_TYPE_REFERENCE = "Invalid type reference sort 0x";
+    private static final String INVALID_LOCAL_VARIABLE_INDEX = "Invalid local variable index";
+    private static final String MUST_NOT_BE_NULL_OR_EMPTY = " (must not be null or empty)";
+    private static final String START_LABEL = "start label";
+    private static final String END_LABEL = "end label";
+
+    /** The class version number. */
+    public int version;
+
+    /** The access flags of the visited method. */
+    private int access;
+
+    /**
+      * The number of method parameters that can have runtime visible annotations. 0 means that all the
+      * parameters from the method descriptor can have annotations.
+      */
+    private int visibleAnnotableParameterCount;
+
+    /**
+      * The number of method parameters that can have runtime invisible annotations. 0 means that all
+      * the parameters from the method descriptor can have annotations.
+      */
+    private int invisibleAnnotableParameterCount;
+
+    /** Whether the {@link #visitCode} method has been called. */
+    private boolean visitCodeCalled;
+
+    /** Whether the {@link #visitMaxs} method has been called. */
+    private boolean visitMaxCalled;
+
+    /** Whether the {@link #visitEnd} method has been called. */
+    private boolean visitEndCalled;
+
+    /** The number of visited instructions so far. */
+    private int insnCount;
+
+    /** The index of the instruction designated by each visited label. */
+    private final Map<Label, Integer> labelInsnIndices;
+
+    /** The labels referenced by the visited method. */
+    private Set<Label> referencedLabels;
+
+    /** The index of the instruction corresponding to the last visited stack map frame. */
+    private int lastFrameInsnIndex = -1;
+
+    /** The number of visited frames in expanded form. */
+    private int numExpandedFrames;
+
+    /** The number of visited frames in compressed form. */
+    private int numCompressedFrames;
+
+    /**
+      * The exception handler ranges. Each pair of list element contains the start and end labels of an
+      * exception handler block.
+      */
+    private List<Label> handlers;
+
+    /**
+      * Constructs a new {@link CheckMethodAdapter} object. This method adapter will not perform any
+      * data flow check (see {@link #CheckMethodAdapter(int,String,String,MethodVisitor,Map)}).
+      * <i>Subclasses must not use this constructor</i>. Instead, they must use the {@link
+      * #CheckMethodAdapter(int, MethodVisitor, Map)} version.
+      *
+      * @param methodvisitor the method visitor to which this adapter must delegate calls.
+      */
+    public CheckMethodAdapter(final MethodVisitor methodvisitor) {
+        this(methodvisitor, new HashMap<>());
+    }
+
+    /**
+      * Constructs a new {@link CheckMethodAdapter} object. This method adapter will not perform any
+      * data flow check (see {@link #CheckMethodAdapter(int,String,String,MethodVisitor,Map)}).
+      * <i>Subclasses must not use this constructor</i>. Instead, they must use the {@link
+      * #CheckMethodAdapter(int, MethodVisitor, Map)} version.
+      *
+      * @param methodVisitor the method visitor to which this adapter must delegate calls.
+      * @param labelInsnIndices the index of the instruction designated by each visited label so far
+      *     (in other methods). This map is updated with the labels from the visited method.
+      * @throws IllegalStateException If a subclass calls this constructor.
+      */
+    public CheckMethodAdapter(
+            final MethodVisitor methodVisitor, final Map<Label, Integer> labelInsnIndices) {
+        this(/* latest api = */ Opcodes.ASM9, methodVisitor, labelInsnIndices);
+        if (getClass() != CheckMethodAdapter.class) {
+            throw new IllegalStateException();
+        }
+    }
+
+    /**
+      * Constructs a new {@link CheckMethodAdapter} object. This method adapter will not perform any
+      * data flow check (see {@link #CheckMethodAdapter(int,String,String,MethodVisitor,Map)}).
+      *
+      * @param api the ASM API version implemented by this CheckMethodAdapter. Must be one of the
+      *     {@code ASM}<i>x</i> values in {@link Opcodes}.
+      * @param methodVisitor the method visitor to which this adapter must delegate calls.
+      * @param labelInsnIndices the index of the instruction designated by each visited label so far
+      *     (in other methods). This map is updated with the labels from the visited method.
+      */
+    protected CheckMethodAdapter(
+            final int api,
+            final MethodVisitor methodVisitor,
+            final Map<Label, Integer> labelInsnIndices) {
+        super(api, methodVisitor);
+        this.labelInsnIndices = labelInsnIndices;
+        this.referencedLabels = new HashSet<>();
+        this.handlers = new ArrayList<>();
+    }
+
+    /**
+      * Constructs a new {@link CheckMethodAdapter} object. This method adapter will perform basic data
+      * flow checks. For instance in a method whose signature is {@code void m ()}, the invalid
+      * instruction IRETURN, or the invalid sequence IADD L2I will be detected. <i>Subclasses must not
+      * use this constructor</i>. Instead, they must use the {@link
+      * #CheckMethodAdapter(int,int,String,String,MethodVisitor,Map)} version.
+      *
+      * @param access the method's access flags.
+      * @param name the method's name.
+      * @param descriptor the method's descriptor (see {@link Type}).
+      * @param methodVisitor the method visitor to which this adapter must delegate calls.
+      * @param labelInsnIndices the index of the instruction designated by each visited label so far
+      *     (in other methods). This map is updated with the labels from the visited method.
+      */
+    public CheckMethodAdapter(
+            final int access,
+            final String name,
+            final String descriptor,
+            final MethodVisitor methodVisitor,
+            final Map<Label, Integer> labelInsnIndices) {
+        this(
+                /* latest api = */ Opcodes.ASM9, access, name, descriptor, methodVisitor, labelInsnIndices);
+        if (getClass() != CheckMethodAdapter.class) {
+            throw new IllegalStateException();
+        }
+    }
+
+    /**
+      * Constructs a new {@link CheckMethodAdapter} object. This method adapter will perform basic data
+      * flow checks. For instance in a method whose signature is {@code void m ()}, the invalid
+      * instruction IRETURN, or the invalid sequence IADD L2I will be detected.
+      *
+      * @param api the ASM API version implemented by this CheckMethodAdapter. Must be one of the
+      *     {@code ASM}<i>x</i> values in {@link Opcodes}.
+      * @param access the method's access flags.
+      * @param name the method's name.
+      * @param descriptor the method's descriptor (see {@link Type}).
+      * @param methodVisitor the method visitor to which this adapter must delegate calls.
+      * @param labelInsnIndices the index of the instruction designated by each visited label so far
+      *     (in other methods). This map is updated with the labels from the visited method.
+      */
+    protected CheckMethodAdapter(
+            final int api,
+            final int access,
+            final String name,
+            final String descriptor,
+            final MethodVisitor methodVisitor,
+            final Map<Label, Integer> labelInsnIndices) {
+        this(
+                api,
+                new MethodNode(api, access, name, descriptor, null, null) {
+                    @Override
+                    public void visitEnd() {
+                        int originalMaxLocals = maxLocals;
+                        int originalMaxStack = maxStack;
+                        boolean checkMaxStackAndLocals = false;
+                        boolean checkFrames = false;
+                        if (methodVisitor instanceof MethodWriterWrapper) {
+                            MethodWriterWrapper methodWriter = (MethodWriterWrapper) methodVisitor;
+                            // If 'methodVisitor' is a MethodWriter of a ClassWriter with no flags to compute the
+                            // max stack and locals nor the stack map frames, we know that valid max stack and
+                            // locals must be provided. Otherwise we assume they are not needed at this stage.
+                            checkMaxStackAndLocals = !methodWriter.computesMaxs();
+                            // If 'methodVisitor' is a MethodWriter of a ClassWriter with no flags to compute the
+                            // stack map frames, we know that valid frames must be provided. Otherwise we assume
+                            // they are not needed at this stage.
+                            checkFrames = methodWriter.requiresFrames() && !methodWriter.computesFrames();
+                        }
+                        Analyzer<BasicValue> analyzer =
+                                checkFrames
+                                        ? new CheckFrameAnalyzer<>(new BasicVerifier())
+                                        : new Analyzer<>(new BasicVerifier());
+                        try {
+                            if (checkMaxStackAndLocals) {
+                                analyzer.analyze("dummy", this);
+                            } else {
+                                analyzer.analyzeAndComputeMaxs("dummy", this);
+                            }
+                        } catch (IndexOutOfBoundsException | AnalyzerException e) {
+                            throwError(analyzer, e);
+                        }
+                        if (methodVisitor != null) {
+                            maxLocals = originalMaxLocals;
+                            maxStack = originalMaxStack;
+                            accept(methodVisitor);
+                        }
+                    }
+
+                    private void throwError(final Analyzer<BasicValue> analyzer, final Exception e) {
+                        StringWriter stringWriter = new StringWriter();
+                        PrintWriter printWriter = new PrintWriter(stringWriter, true);
+                        CheckClassAdapter.printAnalyzerResult(this, analyzer, printWriter);
+                        printWriter.close();
+                        throw new IllegalArgumentException(e.getMessage() + ' ' + stringWriter.toString(), e);
+                    }
+                },
+                labelInsnIndices);
+        this.access = access;
+    }
+
+    @Override
+    public void visitParameter(final String name, final int access) {
+        if (name != null) {
+            checkUnqualifiedName(version, name, "name");
+        }
+        CheckClassAdapter.checkAccess(
+                access, Opcodes.ACC_FINAL | Opcodes.ACC_MANDATED | Opcodes.ACC_SYNTHETIC);
+        super.visitParameter(name, access);
+    }
+
+    @Override
+    public AnnotationVisitor visitAnnotation(final String descriptor, final boolean visible) {
+        checkVisitEndNotCalled();
+        checkDescriptor(version, descriptor, false);
+        return new CheckAnnotationAdapter(super.visitAnnotation(descriptor, visible));
+    }
+
+    @Override
+    public AnnotationVisitor visitTypeAnnotation(
+            final int typeRef, final TypePath typePath, final String descriptor, final boolean visible) {
+        checkVisitEndNotCalled();
+        int sort = new TypeReference(typeRef).getSort();
+        if (sort != TypeReference.METHOD_TYPE_PARAMETER
+                && sort != TypeReference.METHOD_TYPE_PARAMETER_BOUND
+                && sort != TypeReference.METHOD_RETURN
+                && sort != TypeReference.METHOD_RECEIVER
+                && sort != TypeReference.METHOD_FORMAL_PARAMETER
+                && sort != TypeReference.THROWS) {
+            throw new IllegalArgumentException(INVALID_TYPE_REFERENCE + Integer.toHexString(sort));
+        }
+        CheckClassAdapter.checkTypeRef(typeRef);
+        CheckMethodAdapter.checkDescriptor(version, descriptor, false);
+        return new CheckAnnotationAdapter(
+                super.visitTypeAnnotation(typeRef, typePath, descriptor, visible));
+    }
+
+    @Override
+    public AnnotationVisitor visitAnnotationDefault() {
+        checkVisitEndNotCalled();
+        return new CheckAnnotationAdapter(super.visitAnnotationDefault(), false);
+    }
+
+    @Override
+    public void visitAnnotableParameterCount(final int parameterCount, final boolean visible) {
+        checkVisitEndNotCalled();
+        if (visible) {
+            visibleAnnotableParameterCount = parameterCount;
+        } else {
+            invisibleAnnotableParameterCount = parameterCount;
+        }
+        super.visitAnnotableParameterCount(parameterCount, visible);
+    }
+
+    @Override
+    public AnnotationVisitor visitParameterAnnotation(
+            final int parameter, final String descriptor, final boolean visible) {
+        checkVisitEndNotCalled();
+        if ((visible
+                        && visibleAnnotableParameterCount > 0
+                        && parameter >= visibleAnnotableParameterCount)
+                || (!visible
+                        && invisibleAnnotableParameterCount > 0
+                        && parameter >= invisibleAnnotableParameterCount)) {
+            throw new IllegalArgumentException("Invalid parameter index");
+        }
+        checkDescriptor(version, descriptor, false);
+        return new CheckAnnotationAdapter(
+                super.visitParameterAnnotation(parameter, descriptor, visible));
+    }
+
+    @Override
+    public void visitAttribute(final Attribute attribute) {
+        checkVisitEndNotCalled();
+        if (attribute == null) {
+            throw new IllegalArgumentException("Invalid attribute (must not be null)");
+        }
+        super.visitAttribute(attribute);
+    }
+
+    @Override
+    public void visitCode() {
+        if ((access & Opcodes.ACC_ABSTRACT) != 0) {
+            throw new UnsupportedOperationException("Abstract methods cannot have code");
+        }
+        visitCodeCalled = true;
+        super.visitCode();
+    }
+
+    @Override
+    public void visitFrame(
+            final int type,
+            final int numLocal,
+            final Object[] local,
+            final int numStack,
+            final Object[] stack) {
+        if (insnCount == lastFrameInsnIndex) {
+            throw new IllegalStateException("At most one frame can be visited at a given code location.");
+        }
+        lastFrameInsnIndex = insnCount;
+        int maxNumLocal;
+        int maxNumStack;
+        switch (type) {
+            case Opcodes.F_NEW:
+            case Opcodes.F_FULL:
+                maxNumLocal = Integer.MAX_VALUE;
+                maxNumStack = Integer.MAX_VALUE;
+                break;
+
+            case Opcodes.F_SAME:
+                maxNumLocal = 0;
+                maxNumStack = 0;
+                break;
+
+            case Opcodes.F_SAME1:
+                maxNumLocal = 0;
+                maxNumStack = 1;
+                break;
+
+            case Opcodes.F_APPEND:
+            case Opcodes.F_CHOP:
+                maxNumLocal = 3;
+                maxNumStack = 0;
+                break;
+
+            default:
+                throw new IllegalArgumentException("Invalid frame type " + type);
+        }
+
+        if (numLocal > maxNumLocal) {
+            throw new IllegalArgumentException(
+                    "Invalid numLocal=" + numLocal + " for frame type " + type);
+        }
+        if (numStack > maxNumStack) {
+            throw new IllegalArgumentException(
+                    "Invalid numStack=" + numStack + " for frame type " + type);
+        }
+
+        if (type != Opcodes.F_CHOP) {
+            if (numLocal > 0 && (local == null || local.length < numLocal)) {
+                throw new IllegalArgumentException("Array local[] is shorter than numLocal");
+            }
+            for (int i = 0; i < numLocal; ++i) {
+                checkFrameValue(local[i]);
+            }
+        }
+        if (numStack > 0 && (stack == null || stack.length < numStack)) {
+            throw new IllegalArgumentException("Array stack[] is shorter than numStack");
+        }
+        for (int i = 0; i < numStack; ++i) {
+            checkFrameValue(stack[i]);
+        }
+        if (type == Opcodes.F_NEW) {
+            ++numExpandedFrames;
+        } else {
+            ++numCompressedFrames;
+        }
+        if (numExpandedFrames > 0 && numCompressedFrames > 0) {
+            throw new IllegalArgumentException("Expanded and compressed frames must not be mixed.");
+        }
+        super.visitFrame(type, numLocal, local, numStack, stack);
+    }
+
+    @Override
+    public void visitInsn(final int opcode) {
+        checkVisitCodeCalled();
+        checkVisitMaxsNotCalled();
+        checkOpcodeMethod(opcode, Method.VISIT_INSN);
+        super.visitInsn(opcode);
+        ++insnCount;
+    }
+
+    @Override
+    public void visitIntInsn(final int opcode, final int operand) {
+        checkVisitCodeCalled();
+        checkVisitMaxsNotCalled();
+        checkOpcodeMethod(opcode, Method.VISIT_INT_INSN);
+        switch (opcode) {
+            case Opcodes.BIPUSH:
+                checkSignedByte(operand, "Invalid operand");
+                break;
+            case Opcodes.SIPUSH:
+                checkSignedShort(operand, "Invalid operand");
+                break;
+            case Opcodes.NEWARRAY:
+                if (operand < Opcodes.T_BOOLEAN || operand > Opcodes.T_LONG) {
+                    throw new IllegalArgumentException(
+                            "Invalid operand (must be an array type code T_...): " + operand);
+                }
+                break;
+            default:
+                throw new AssertionError();
+        }
+        super.visitIntInsn(opcode, operand);
+        ++insnCount;
+    }
+
+    @Override
+    public void visitVarInsn(final int opcode, final int varIndex) {
+        checkVisitCodeCalled();
+        checkVisitMaxsNotCalled();
+        checkOpcodeMethod(opcode, Method.VISIT_VAR_INSN);
+        checkUnsignedShort(varIndex, INVALID_LOCAL_VARIABLE_INDEX);
+        super.visitVarInsn(opcode, varIndex);
+        ++insnCount;
+    }
+
+    @Override
+    public void visitTypeInsn(final int opcode, final String type) {
+        checkVisitCodeCalled();
+        checkVisitMaxsNotCalled();
+        checkOpcodeMethod(opcode, Method.VISIT_TYPE_INSN);
+        checkInternalName(version, type, "type");
+        if (opcode == Opcodes.NEW && type.charAt(0) == '[') {
+            throw new IllegalArgumentException("NEW cannot be used to create arrays: " + type);
+        }
+        super.visitTypeInsn(opcode, type);
+        ++insnCount;
+    }
+
+    @Override
+    public void visitFieldInsn(
+            final int opcode, final String owner, final String name, final String descriptor) {
+        checkVisitCodeCalled();
+        checkVisitMaxsNotCalled();
+        checkOpcodeMethod(opcode, Method.VISIT_FIELD_INSN);
+        checkInternalName(version, owner, "owner");
+        checkUnqualifiedName(version, name, "name");
+        checkDescriptor(version, descriptor, false);
+        super.visitFieldInsn(opcode, owner, name, descriptor);
+        ++insnCount;
+    }
+
+    @Override
+    public void visitMethodInsn(
+            final int opcodeAndSource,
+            final String owner,
+            final String name,
+            final String descriptor,
+            final boolean isInterface) {
+        if (api < Opcodes.ASM5 && (opcodeAndSource & Opcodes.SOURCE_DEPRECATED) == 0) {
+            // Redirect the call to the deprecated version of this method.
+            super.visitMethodInsn(opcodeAndSource, owner, name, descriptor, isInterface);
+            return;
+        }
+        int opcode = opcodeAndSource & ~Opcodes.SOURCE_MASK;
+
+        checkVisitCodeCalled();
+        checkVisitMaxsNotCalled();
+        checkOpcodeMethod(opcode, Method.VISIT_METHOD_INSN);
+        if (opcode != Opcodes.INVOKESPECIAL || !"<init>".equals(name)) {
+            checkMethodIdentifier(version, name, "name");
+        }
+        checkInternalName(version, owner, "owner");
+        checkMethodDescriptor(version, descriptor);
+        if (opcode == Opcodes.INVOKEVIRTUAL && isInterface) {
+            throw new IllegalArgumentException("INVOKEVIRTUAL can't be used with interfaces");
+        }
+        if (opcode == Opcodes.INVOKEINTERFACE && !isInterface) {
+            throw new IllegalArgumentException("INVOKEINTERFACE can't be used with classes");
+        }
+        if (opcode == Opcodes.INVOKESPECIAL && isInterface && (version & 0xFFFF) < Opcodes.V1_8) {
+            throw new IllegalArgumentException(
+                    "INVOKESPECIAL can't be used with interfaces prior to Java 8");
+        }
+        super.visitMethodInsn(opcodeAndSource, owner, name, descriptor, isInterface);
+        ++insnCount;
+    }
+
+    @Override
+    public void visitInvokeDynamicInsn(
+            final String name,
+            final String descriptor,
+            final Handle bootstrapMethodHandle,
+            final Object... bootstrapMethodArguments) {
+        checkVisitCodeCalled();
+        checkVisitMaxsNotCalled();
+        checkMethodIdentifier(version, name, "name");
+        checkMethodDescriptor(version, descriptor);
+        if (bootstrapMethodHandle.getTag() != Opcodes.H_INVOKESTATIC
+                && bootstrapMethodHandle.getTag() != Opcodes.H_NEWINVOKESPECIAL) {
+            throw new IllegalArgumentException("invalid handle tag " + bootstrapMethodHandle.getTag());
+        }
+        for (Object bootstrapMethodArgument : bootstrapMethodArguments) {
+            checkLdcConstant(bootstrapMethodArgument);
+        }
+        super.visitInvokeDynamicInsn(name, descriptor, bootstrapMethodHandle, bootstrapMethodArguments);
+        ++insnCount;
+    }
+
+    @Override
+    public void visitJumpInsn(final int opcode, final Label label) {
+        checkVisitCodeCalled();
+        checkVisitMaxsNotCalled();
+        checkOpcodeMethod(opcode, Method.VISIT_JUMP_INSN);
+        checkLabel(label, /* checkVisited = */ false, "label");
+        super.visitJumpInsn(opcode, label);
+        ++insnCount;
+    }
+
+    @Override
+    public void visitLabel(final Label label) {
+        checkVisitCodeCalled();
+        checkVisitMaxsNotCalled();
+        checkLabel(label, /* checkVisited = */ false, "label");
+        if (labelInsnIndices.get(label) != null) {
+            throw new IllegalStateException("Already visited label");
+        }
+        labelInsnIndices.put(label, insnCount);
+        super.visitLabel(label);
+    }
+
+    @Override
+    public void visitLdcInsn(final Object value) {
+        checkVisitCodeCalled();
+        checkVisitMaxsNotCalled();
+        checkLdcConstant(value);
+        super.visitLdcInsn(value);
+        ++insnCount;
+    }
+
+    @Override
+    public void visitIincInsn(final int varIndex, final int increment) {
+        checkVisitCodeCalled();
+        checkVisitMaxsNotCalled();
+        checkUnsignedShort(varIndex, INVALID_LOCAL_VARIABLE_INDEX);
+        checkSignedShort(increment, "Invalid increment");
+        super.visitIincInsn(varIndex, increment);
+        ++insnCount;
+    }
+
+    @Override
+    public void visitTableSwitchInsn(
+            final int min, final int max, final Label dflt, final Label... labels) {
+        checkVisitCodeCalled();
+        checkVisitMaxsNotCalled();
+        if (max < min) {
+            throw new IllegalArgumentException(
+                    "Max = " + max + " must be greater than or equal to min = " + min);
+        }
+        checkLabel(dflt, /* checkVisited = */ false, "default label");
+        if (labels == null || labels.length != max - min + 1) {
+            throw new IllegalArgumentException("There must be max - min + 1 labels");
+        }
+        for (int i = 0; i < labels.length; ++i) {
+            checkLabel(labels[i], /* checkVisited = */ false, "label at index " + i);
+        }
+        super.visitTableSwitchInsn(min, max, dflt, labels);
+        ++insnCount;
+    }
+
+    @Override
+    public void visitLookupSwitchInsn(final Label dflt, final int[] keys, final Label[] labels) {
+        checkVisitMaxsNotCalled();
+        checkVisitCodeCalled();
+        checkLabel(dflt, /* checkVisited = */ false, "default label");
+        if (keys == null || labels == null || keys.length != labels.length) {
+            throw new IllegalArgumentException("There must be the same number of keys and labels");
+        }
+        for (int i = 0; i < labels.length; ++i) {
+            checkLabel(labels[i], /* checkVisited = */ false, "label at index " + i);
+        }
+        super.visitLookupSwitchInsn(dflt, keys, labels);
+        ++insnCount;
+    }
+
+    @Override
+    public void visitMultiANewArrayInsn(final String descriptor, final int numDimensions) {
+        checkVisitCodeCalled();
+        checkVisitMaxsNotCalled();
+        checkDescriptor(version, descriptor, false);
+        if (descriptor.charAt(0) != '[') {
+            throw new IllegalArgumentException(
+                    "Invalid descriptor (must be an array type descriptor): " + descriptor);
+        }
+        if (numDimensions < 1) {
+            throw new IllegalArgumentException(
+                    "Invalid dimensions (must be greater than 0): " + numDimensions);
+        }
+        if (numDimensions > descriptor.lastIndexOf('[') + 1) {
+            throw new IllegalArgumentException(
+                    "Invalid dimensions (must not be greater than numDimensions(descriptor)): "
+                            + numDimensions);
+        }
+        super.visitMultiANewArrayInsn(descriptor, numDimensions);
+        ++insnCount;
+    }
+
+    @Override
+    public AnnotationVisitor visitInsnAnnotation(
+            final int typeRef, final TypePath typePath, final String descriptor, final boolean visible) {
+        checkVisitCodeCalled();
+        checkVisitMaxsNotCalled();
+        int sort = new TypeReference(typeRef).getSort();
+        if (sort != TypeReference.INSTANCEOF
+                && sort != TypeReference.NEW
+                && sort != TypeReference.CONSTRUCTOR_REFERENCE
+                && sort != TypeReference.METHOD_REFERENCE
+                && sort != TypeReference.CAST
+                && sort != TypeReference.CONSTRUCTOR_INVOCATION_TYPE_ARGUMENT
+                && sort != TypeReference.METHOD_INVOCATION_TYPE_ARGUMENT
+                && sort != TypeReference.CONSTRUCTOR_REFERENCE_TYPE_ARGUMENT
+                && sort != TypeReference.METHOD_REFERENCE_TYPE_ARGUMENT) {
+            throw new IllegalArgumentException(INVALID_TYPE_REFERENCE + Integer.toHexString(sort));
+        }
+        CheckClassAdapter.checkTypeRef(typeRef);
+        CheckMethodAdapter.checkDescriptor(version, descriptor, false);
+        return new CheckAnnotationAdapter(
+                super.visitInsnAnnotation(typeRef, typePath, descriptor, visible));
+    }
+
+    @Override
+    public void visitTryCatchBlock(
+            final Label start, final Label end, final Label handler, final String type) {
+        checkVisitCodeCalled();
+        checkVisitMaxsNotCalled();
+        checkLabel(start, /* checkVisited = */ false, START_LABEL);
+        checkLabel(end, /* checkVisited = */ false, END_LABEL);
+        checkLabel(handler, /* checkVisited = */ false, "handler label");
+        if (labelInsnIndices.get(start) != null
+                || labelInsnIndices.get(end) != null
+                || labelInsnIndices.get(handler) != null) {
+            throw new IllegalStateException("Try catch blocks must be visited before their labels");
+        }
+        if (type != null) {
+            checkInternalName(version, type, "type");
+        }
+        super.visitTryCatchBlock(start, end, handler, type);
+        handlers.add(start);
+        handlers.add(end);
+    }
+
+    @Override
+    public AnnotationVisitor visitTryCatchAnnotation(
+            final int typeRef, final TypePath typePath, final String descriptor, final boolean visible) {
+        checkVisitCodeCalled();
+        checkVisitMaxsNotCalled();
+        int sort = new TypeReference(typeRef).getSort();
+        if (sort != TypeReference.EXCEPTION_PARAMETER) {
+            throw new IllegalArgumentException(INVALID_TYPE_REFERENCE + Integer.toHexString(sort));
+        }
+        CheckClassAdapter.checkTypeRef(typeRef);
+        CheckMethodAdapter.checkDescriptor(version, descriptor, false);
+        return new CheckAnnotationAdapter(
+                super.visitTryCatchAnnotation(typeRef, typePath, descriptor, visible));
+    }
+
+    @Override
+    public void visitLocalVariable(
+            final String name,
+            final String descriptor,
+            final String signature,
+            final Label start,
+            final Label end,
+            final int index) {
+        checkVisitCodeCalled();
+        checkVisitMaxsNotCalled();
+        checkUnqualifiedName(version, name, "name");
+        checkDescriptor(version, descriptor, false);
+        if (signature != null) {
+            CheckClassAdapter.checkFieldSignature(signature);
+        }
+        checkLabel(start, /* checkVisited = */ true, START_LABEL);
+        checkLabel(end, /* checkVisited = */ true, END_LABEL);
+        checkUnsignedShort(index, INVALID_LOCAL_VARIABLE_INDEX);
+        int startInsnIndex = labelInsnIndices.get(start).intValue();
+        int endInsnIndex = labelInsnIndices.get(end).intValue();
+        if (endInsnIndex < startInsnIndex) {
+            throw new IllegalArgumentException(
+                    "Invalid start and end labels (end must be greater than start)");
+        }
+        super.visitLocalVariable(name, descriptor, signature, start, end, index);
+    }
+
+    @Override
+    public AnnotationVisitor visitLocalVariableAnnotation(
+            final int typeRef,
+            final TypePath typePath,
+            final Label[] start,
+            final Label[] end,
+            final int[] index,
+            final String descriptor,
+            final boolean visible) {
+        checkVisitCodeCalled();
+        checkVisitMaxsNotCalled();
+        int sort = new TypeReference(typeRef).getSort();
+        if (sort != TypeReference.LOCAL_VARIABLE && sort != TypeReference.RESOURCE_VARIABLE) {
+            throw new IllegalArgumentException(INVALID_TYPE_REFERENCE + Integer.toHexString(sort));
+        }
+        CheckClassAdapter.checkTypeRef(typeRef);
+        checkDescriptor(version, descriptor, false);
+        if (start == null
+                || end == null
+                || index == null
+                || end.length != start.length
+                || index.length != start.length) {
+            throw new IllegalArgumentException(
+                    "Invalid start, end and index arrays (must be non null and of identical length");
+        }
+        for (int i = 0; i < start.length; ++i) {
+            checkLabel(start[i], /* checkVisited = */ true, START_LABEL);
+            checkLabel(end[i], /* checkVisited = */ true, END_LABEL);
+            checkUnsignedShort(index[i], INVALID_LOCAL_VARIABLE_INDEX);
+            int startInsnIndex = labelInsnIndices.get(start[i]).intValue();
+            int endInsnIndex = labelInsnIndices.get(end[i]).intValue();
+            if (endInsnIndex < startInsnIndex) {
+                throw new IllegalArgumentException(
+                        "Invalid start and end labels (end must be greater than start)");
+            }
+        }
+        return super.visitLocalVariableAnnotation(
+                typeRef, typePath, start, end, index, descriptor, visible);
+    }
+
+    @Override
+    public void visitLineNumber(final int line, final Label start) {
+        checkVisitCodeCalled();
+        checkVisitMaxsNotCalled();
+        checkUnsignedShort(line, "Invalid line number");
+        checkLabel(start, /* checkVisited = */ true, START_LABEL);
+        super.visitLineNumber(line, start);
+    }
+
+    @Override
+    public void visitMaxs(final int maxStack, final int maxLocals) {
+        checkVisitCodeCalled();
+        checkVisitMaxsNotCalled();
+        visitMaxCalled = true;
+        for (Label l : referencedLabels) {
+            if (labelInsnIndices.get(l) == null) {
+                throw new IllegalStateException("Undefined label used");
+            }
+        }
+        for (int i = 0; i < handlers.size(); i += 2) {
+            Integer startInsnIndex = labelInsnIndices.get(handlers.get(i));
+            Integer endInsnIndex = labelInsnIndices.get(handlers.get(i + 1));
+            if (endInsnIndex.intValue() <= startInsnIndex.intValue()) {
+                throw new IllegalStateException("Empty try catch block handler range");
+            }
+        }
+        checkUnsignedShort(maxStack, "Invalid max stack");
+        checkUnsignedShort(maxLocals, "Invalid max locals");
+        super.visitMaxs(maxStack, maxLocals);
+    }
+
+    @Override
+    public void visitEnd() {
+        checkVisitEndNotCalled();
+        visitEndCalled = true;
+        super.visitEnd();
+    }
+
+    // -----------------------------------------------------------------------------------------------
+    // Utility methods
+    // -----------------------------------------------------------------------------------------------
+
+    /** Checks that the {@link #visitCode} method has been called. */
+    private void checkVisitCodeCalled() {
+        if (!visitCodeCalled) {
+            throw new IllegalStateException(
+                    "Cannot visit instructions before visitCode has been called.");
+        }
+    }
+
+    /** Checks that the {@link #visitMaxs} method has not been called. */
+    private void checkVisitMaxsNotCalled() {
+        if (visitMaxCalled) {
+            throw new IllegalStateException("Cannot visit instructions after visitMaxs has been called.");
+        }
+    }
+
+    /** Checks that the {@link #visitEnd} method has not been called. */
+    private void checkVisitEndNotCalled() {
+        if (visitEndCalled) {
+            throw new IllegalStateException("Cannot visit elements after visitEnd has been called.");
+        }
+    }
+
+    /**
+      * Checks a stack frame value.
+      *
+      * @param value the value to be checked.
+      */
+    private void checkFrameValue(final Object value) {
+        if (value == Opcodes.TOP
+                || value == Opcodes.INTEGER
+                || value == Opcodes.FLOAT
+                || value == Opcodes.LONG
+                || value == Opcodes.DOUBLE
+                || value == Opcodes.NULL
+                || value == Opcodes.UNINITIALIZED_THIS) {
+            return;
+        }
+        if (value instanceof String) {
+            checkInternalName(version, (String) value, "Invalid stack frame value");
+        } else if (value instanceof Label) {
+            checkLabel((Label) value, /* checkVisited = */ false, "label");
+        } else {
+            throw new IllegalArgumentException("Invalid stack frame value: " + value);
+        }
+    }
+
+    /**
+      * Checks that the method to visit the given opcode is equal to the given method.
+      *
+      * @param opcode the opcode to be checked.
+      * @param method the expected visit method.
+      */
+    private static void checkOpcodeMethod(final int opcode, final Method method) {
+        if (opcode < Opcodes.NOP || opcode > Opcodes.IFNONNULL) {
+            throw new IllegalArgumentException("Invalid opcode: " + opcode);
+        }
+        if (OPCODE_METHODS[opcode] != method) {
+            throw new IllegalArgumentException(
+                    "Invalid combination of opcode and method: " + opcode + ", " + method);
+        }
+    }
+
+    /**
+      * Checks that the given value is a signed byte.
+      *
+      * @param value the value to be checked.
+      * @param message the message to use in case of error.
+      */
+    private static void checkSignedByte(final int value, final String message) {
+        if (value < Byte.MIN_VALUE || value > Byte.MAX_VALUE) {
+            throw new IllegalArgumentException(message + " (must be a signed byte): " + value);
+        }
+    }
+
+    /**
+      * Checks that the given value is a signed short.
+      *
+      * @param value the value to be checked.
+      * @param message the message to use in case of error.
+      */
+    private static void checkSignedShort(final int value, final String message) {
+        if (value < Short.MIN_VALUE || value > Short.MAX_VALUE) {
+            throw new IllegalArgumentException(message + " (must be a signed short): " + value);
+        }
+    }
+
+    /**
+      * Checks that the given value is an unsigned short.
+      *
+      * @param value the value to be checked.
+      * @param message the message to use in case of error.
+      */
+    private static void checkUnsignedShort(final int value, final String message) {
+        if (value < 0 || value > 65535) {
+            throw new IllegalArgumentException(message + " (must be an unsigned short): " + value);
+        }
+    }
+
+    /**
+      * Checks that the given value is an {@link Integer}, {@link Float}, {@link Long}, {@link Double}
+      * or {@link String} value.
+      *
+      * @param value the value to be checked.
+      */
+    static void checkConstant(final Object value) {
+        if (!(value instanceof Integer)
+                && !(value instanceof Float)
+                && !(value instanceof Long)
+                && !(value instanceof Double)
+                && !(value instanceof String)) {
+            throw new IllegalArgumentException("Invalid constant: " + value);
+        }
+    }
+
+    /**
+      * Checks that the given value is a valid operand for the LDC instruction.
+      *
+      * @param value the value to be checked.
+      */
+    private void checkLdcConstant(final Object value) {
+        if (value instanceof Type) {
+            int sort = ((Type) value).getSort();
+            if (sort != Type.OBJECT && sort != Type.ARRAY && sort != Type.METHOD) {
+                throw new IllegalArgumentException("Illegal LDC constant value");
+            }
+            if (sort != Type.METHOD && (version & 0xFFFF) < Opcodes.V1_5) {
+                throw new IllegalArgumentException("ldc of a constant class requires at least version 1.5");
+            }
+            if (sort == Type.METHOD && (version & 0xFFFF) < Opcodes.V1_7) {
+                throw new IllegalArgumentException("ldc of a method type requires at least version 1.7");
+            }
+        } else if (value instanceof Handle) {
+            if ((version & 0xFFFF) < Opcodes.V1_7) {
+                throw new IllegalArgumentException("ldc of a Handle requires at least version 1.7");
+            }
+            Handle handle = (Handle) value;
+            int tag = handle.getTag();
+            if (tag < Opcodes.H_GETFIELD || tag > Opcodes.H_INVOKEINTERFACE) {
+                throw new IllegalArgumentException("invalid handle tag " + tag);
+            }
+            checkInternalName(this.version, handle.getOwner(), "handle owner");
+            if (tag <= Opcodes.H_PUTSTATIC) {
+                checkDescriptor(this.version, handle.getDesc(), false);
+            } else {
+                checkMethodDescriptor(this.version, handle.getDesc());
+            }
+            String handleName = handle.getName();
+            if (!("<init>".equals(handleName) && tag == Opcodes.H_NEWINVOKESPECIAL)) {
+                checkMethodIdentifier(this.version, handleName, "handle name");
+            }
+        } else if (value instanceof ConstantDynamic) {
+            if ((version & 0xFFFF) < Opcodes.V11) {
+                throw new IllegalArgumentException("ldc of a ConstantDynamic requires at least version 11");
+            }
+            ConstantDynamic constantDynamic = (ConstantDynamic) value;
+            checkMethodIdentifier(this.version, constantDynamic.getName(), "constant dynamic name");
+            checkDescriptor(this.version, constantDynamic.getDescriptor(), false);
+            checkLdcConstant(constantDynamic.getBootstrapMethod());
+            int bootstrapMethodArgumentCount = constantDynamic.getBootstrapMethodArgumentCount();
+            for (int i = 0; i < bootstrapMethodArgumentCount; ++i) {
+                checkLdcConstant(constantDynamic.getBootstrapMethodArgument(i));
+            }
+        } else {
+            checkConstant(value);
+        }
+    }
+
+    /**
+      * Checks that the given string is a valid unqualified name.
+      *
+      * @param version the class version.
+      * @param name the string to be checked.
+      * @param message the message to use in case of error.
+      */
+    static void checkUnqualifiedName(final int version, final String name, final String message) {
+        checkIdentifier(version, name, 0, -1, message);
+    }
+
+    /**
+      * Checks that the given substring is a valid Java identifier.
+      *
+      * @param version the class version.
+      * @param name the string to be checked.
+      * @param startPos the index of the first character of the identifier (inclusive).
+      * @param endPos the index of the last character of the identifier (exclusive). -1 is equivalent
+      *     to {@code name.length()} if name is not {@literal null}.
+      * @param message the message to use in case of error.
+      */
+    static void checkIdentifier(
+            final int version,
+            final String name,
+            final int startPos,
+            final int endPos,
+            final String message) {
+        if (name == null || (endPos == -1 ? name.length() <= startPos : endPos <= startPos)) {
+            throw new IllegalArgumentException(INVALID + message + MUST_NOT_BE_NULL_OR_EMPTY);
+        }
+        int max = endPos == -1 ? name.length() : endPos;
+        if ((version & 0xFFFF) >= Opcodes.V1_5) {
+            for (int i = startPos; i < max; i = name.offsetByCodePoints(i, 1)) {
+                if (".;[/".indexOf(name.codePointAt(i)) != -1) {
+                    throw new IllegalArgumentException(
+                            INVALID + message + " (must not contain . ; [ or /): " + name);
+                }
+            }
+            return;
+        }
+        for (int i = startPos; i < max; i = name.offsetByCodePoints(i, 1)) {
+            if (i == startPos
+                    ? !Character.isJavaIdentifierStart(name.codePointAt(i))
+                    : !Character.isJavaIdentifierPart(name.codePointAt(i))) {
+                throw new IllegalArgumentException(
+                        INVALID + message + " (must be a valid Java identifier): " + name);
+            }
+        }
+    }
+
+    /**
+      * Checks that the given string is a valid Java identifier.
+      *
+      * @param version the class version.
+      * @param name the string to be checked.
+      * @param message the message to use in case of error.
+      */
+    static void checkMethodIdentifier(final int version, final String name, final String message) {
+        if (name == null || name.length() == 0) {
+            throw new IllegalArgumentException(INVALID + message + MUST_NOT_BE_NULL_OR_EMPTY);
+        }
+        if ((version & 0xFFFF) >= Opcodes.V1_5) {
+            for (int i = 0; i < name.length(); i = name.offsetByCodePoints(i, 1)) {
+                if (".;[/<>".indexOf(name.codePointAt(i)) != -1) {
+                    throw new IllegalArgumentException(
+                            INVALID + message + " (must be a valid unqualified name): " + name);
+                }
+            }
+            return;
+        }
+        for (int i = 0; i < name.length(); i = name.offsetByCodePoints(i, 1)) {
+            if (i == 0
+                    ? !Character.isJavaIdentifierStart(name.codePointAt(i))
+                    : !Character.isJavaIdentifierPart(name.codePointAt(i))) {
+                throw new IllegalArgumentException(
+                        INVALID
+                                + message
+                                + " (must be a '<init>', '<clinit>' or a valid Java identifier): "
+                                + name);
+            }
+        }
+    }
+
+    /**
+      * Checks that the given string is a valid internal class name or array type descriptor.
+      *
+      * @param version the class version.
+      * @param name the string to be checked.
+      * @param message the message to use in case of error.
+      */
+    static void checkInternalName(final int version, final String name, final String message) {
+        if (name == null || name.length() == 0) {
+            throw new IllegalArgumentException(INVALID + message + MUST_NOT_BE_NULL_OR_EMPTY);
+        }
+        if (name.charAt(0) == '[') {
+            checkDescriptor(version, name, false);
+        } else {
+            checkInternalClassName(version, name, message);
+        }
+    }
+
+    /**
+      * Checks that the given string is a valid internal class name.
+      *
+      * @param version the class version.
+      * @param name the string to be checked.
+      * @param message the message to use in case of error.
+      */
+    private static void checkInternalClassName(
+            final int version, final String name, final String message) {
+        try {
+            int startIndex = 0;
+            int slashIndex;
+            while ((slashIndex = name.indexOf('/', startIndex + 1)) != -1) {
+                checkIdentifier(version, name, startIndex, slashIndex, null);
+                startIndex = slashIndex + 1;
+            }
+            checkIdentifier(version, name, startIndex, name.length(), null);
+        } catch (IllegalArgumentException e) {
+            throw new IllegalArgumentException(
+                    INVALID + message + " (must be an internal class name): " + name, e);
+        }
+    }
+
+    /**
+      * Checks that the given string is a valid type descriptor.
+      *
+      * @param version the class version.
+      * @param descriptor the string to be checked.
+      * @param canBeVoid {@literal true} if {@code V} can be considered valid.
+      */
+    static void checkDescriptor(final int version, final String descriptor, final boolean canBeVoid) {
+        int endPos = checkDescriptor(version, descriptor, 0, canBeVoid);
+        if (endPos != descriptor.length()) {
+            throw new IllegalArgumentException(INVALID_DESCRIPTOR + descriptor);
+        }
+    }
+
+    /**
+      * Checks that the given substring is a valid type descriptor.
+      *
+      * @param version the class version.
+      * @param descriptor the string to be checked.
+      * @param startPos the index of the first character of the type descriptor (inclusive).
+      * @param canBeVoid whether {@code V} can be considered valid.
+      * @return the index of the last character of the type descriptor, plus one.
+      */
+    private static int checkDescriptor(
+            final int version, final String descriptor, final int startPos, final boolean canBeVoid) {
+        if (descriptor == null || startPos >= descriptor.length()) {
+            throw new IllegalArgumentException("Invalid type descriptor (must not be null or empty)");
+        }
+        switch (descriptor.charAt(startPos)) {
+            case 'V':
+                if (canBeVoid) {
+                    return startPos + 1;
+                } else {
+                    throw new IllegalArgumentException(INVALID_DESCRIPTOR + descriptor);
+                }
+            case 'Z':
+            case 'C':
+            case 'B':
+            case 'S':
+            case 'I':
+            case 'F':
+            case 'J':
+            case 'D':
+                return startPos + 1;
+            case '[':
+                int pos = startPos + 1;
+                while (pos < descriptor.length() && descriptor.charAt(pos) == '[') {
+                    ++pos;
+                }
+                if (pos < descriptor.length()) {
+                    return checkDescriptor(version, descriptor, pos, false);
+                } else {
+                    throw new IllegalArgumentException(INVALID_DESCRIPTOR + descriptor);
+                }
+            case 'L':
+                int endPos = descriptor.indexOf(';', startPos);
+                if (startPos == -1 || endPos - startPos < 2) {
+                    throw new IllegalArgumentException(INVALID_DESCRIPTOR + descriptor);
+                }
+                try {
+                    checkInternalClassName(version, descriptor.substring(startPos + 1, endPos), null);
+                } catch (IllegalArgumentException e) {
+                    throw new IllegalArgumentException(INVALID_DESCRIPTOR + descriptor, e);
+                }
+                return endPos + 1;
+            default:
+                throw new IllegalArgumentException(INVALID_DESCRIPTOR + descriptor);
+        }
+    }
+
+    /**
+      * Checks that the given string is a valid method descriptor.
+      *
+      * @param version the class version.
+      * @param descriptor the string to be checked.
+      */
+    static void checkMethodDescriptor(final int version, final String descriptor) {
+        if (descriptor == null || descriptor.length() == 0) {
+            throw new IllegalArgumentException("Invalid method descriptor (must not be null or empty)");
+        }
+        if (descriptor.charAt(0) != '(' || descriptor.length() < 3) {
+            throw new IllegalArgumentException(INVALID_DESCRIPTOR + descriptor);
+        }
+        int pos = 1;
+        if (descriptor.charAt(pos) != ')') {
+            do {
+                if (descriptor.charAt(pos) == 'V') {
+                    throw new IllegalArgumentException(INVALID_DESCRIPTOR + descriptor);
+                }
+                pos = checkDescriptor(version, descriptor, pos, false);
+            } while (pos < descriptor.length() && descriptor.charAt(pos) != ')');
+        }
+        pos = checkDescriptor(version, descriptor, pos + 1, true);
+        if (pos != descriptor.length()) {
+            throw new IllegalArgumentException(INVALID_DESCRIPTOR + descriptor);
+        }
+    }
+
+    /**
+      * Checks that the given label is not null. This method can also check that the label has been
+      * visited.
+      *
+      * @param label the label to be checked.
+      * @param checkVisited whether to check that the label has been visited.
+      * @param message the message to use in case of error.
+      */
+    private void checkLabel(final Label label, final boolean checkVisited, final String message) {
+        if (label == null) {
+            throw new IllegalArgumentException(INVALID + message + " (must not be null)");
+        }
+        if (checkVisited && labelInsnIndices.get(label) == null) {
+            throw new IllegalArgumentException(INVALID + message + " (must be visited first)");
+        }
+        referencedLabels.add(label);
+    }
+
+    static class MethodWriterWrapper extends MethodVisitor {
+
+        /** The class version number. */
+        private final int version;
+
+        private final ClassWriter owner;
+
+        MethodWriterWrapper(
+                final int api,
+                final int version,
+                final ClassWriter owner,
+                final MethodVisitor methodWriter) {
+            super(api, methodWriter);
+            this.version = version;
+            this.owner = owner;
+        }
+
+        boolean computesMaxs() {
+            return owner.hasFlags(ClassWriter.COMPUTE_MAXS) || owner.hasFlags(ClassWriter.COMPUTE_FRAMES);
+        }
+
+        boolean computesFrames() {
+            return owner.hasFlags(ClassWriter.COMPUTE_FRAMES);
+        }
+
+        boolean requiresFrames() {
+            return (version & 0xFFFF) >= Opcodes.V1_7;
+        }
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/org/objectweb/asm/util/CheckModuleAdapter$NameSet.class b/tests/test_data/std/jdk/internal/org/objectweb/asm/util/CheckModuleAdapter$NameSet.class
new file mode 100644
index 0000000000000000000000000000000000000000..d401fd0902da327eca59d783909e8452b59c4da7
GIT binary patch
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Dec~mB

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HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/org/objectweb/asm/util/CheckModuleAdapter.class b/tests/test_data/std/jdk/internal/org/objectweb/asm/util/CheckModuleAdapter.class
new file mode 100644
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GIT binary patch
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/org/objectweb/asm/util/CheckModuleAdapter.java b/tests/test_data/std/jdk/internal/org/objectweb/asm/util/CheckModuleAdapter.java
new file mode 100644
index 00000000..de94a1d3
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/org/objectweb/asm/util/CheckModuleAdapter.java
@@ -0,0 +1,244 @@
+/*
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/*
+ * This file is available under and governed by the GNU General Public
+ * License version 2 only, as published by the Free Software Foundation.
+ * However, the following notice accompanied the original version of this
+ * file:
+ *
+ * ASM: a very small and fast Java bytecode manipulation framework
+ * Copyright (c) 2000-2011 INRIA, France Telecom
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the copyright holders nor the names of its
+ *    contributors may be used to endorse or promote products derived from
+ *    this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+package jdk.internal.org.objectweb.asm.util;
+
+import java.util.HashSet;
+import jdk.internal.org.objectweb.asm.ModuleVisitor;
+import jdk.internal.org.objectweb.asm.Opcodes;
+
+/**
+ * A {@link ModuleVisitor} that checks that its methods are properly used.
+ *
+ * @author Remi Forax
+ */
+public class CheckModuleAdapter extends ModuleVisitor {
+    /** Whether the visited module is open. */
+    private final boolean isOpen;
+
+    /** The fully qualified names of the dependencies of the visited module. */
+    private final NameSet requiredModules = new NameSet("Modules requires");
+
+    /** The internal names of the packages exported by the visited module. */
+    private final NameSet exportedPackages = new NameSet("Module exports");
+
+    /** The internal names of the packages opened by the visited module. */
+    private final NameSet openedPackages = new NameSet("Module opens");
+
+    /** The internal names of the services used by the visited module. */
+    private final NameSet usedServices = new NameSet("Module uses");
+
+    /** The internal names of the services provided by the visited module. */
+    private final NameSet providedServices = new NameSet("Module provides");
+
+    /** The class version number. */
+    int classVersion;
+
+    /** Whether the {@link #visitEnd} method has been called. */
+    private boolean visitEndCalled;
+
+    /**
+      * Constructs a new {@link CheckModuleAdapter}. <i>Subclasses must not use this constructor</i>.
+      * Instead, they must use the {@link #CheckModuleAdapter(int, ModuleVisitor, boolean)} version.
+      *
+      * @param moduleVisitor the module visitor to which this adapter must delegate calls.
+      * @param isOpen whether the visited module is open. Open modules have their {@link
+      *     Opcodes#ACC_OPEN} access flag set in {@link jdk.internal.org.objectweb.asm.ClassVisitor#visitModule}.
+      * @throws IllegalStateException If a subclass calls this constructor.
+      */
+    public CheckModuleAdapter(final ModuleVisitor moduleVisitor, final boolean isOpen) {
+        this(/* latest api = */ Opcodes.ASM9, moduleVisitor, isOpen);
+        if (getClass() != CheckModuleAdapter.class) {
+            throw new IllegalStateException();
+        }
+    }
+
+    /**
+      * Constructs a new {@link CheckModuleAdapter}.
+      *
+      * @param api the ASM API version implemented by this visitor. Must be one of the {@code
+      *     ASM}<i>x</i> values in {@link Opcodes}.
+      * @param moduleVisitor the module visitor to which this adapter must delegate calls.
+      * @param isOpen whether the visited module is open. Open modules have their {@link
+      *     Opcodes#ACC_OPEN} access flag set in {@link jdk.internal.org.objectweb.asm.ClassVisitor#visitModule}.
+      */
+    protected CheckModuleAdapter(
+            final int api, final ModuleVisitor moduleVisitor, final boolean isOpen) {
+        super(api, moduleVisitor);
+        this.isOpen = isOpen;
+    }
+
+    @Override
+    public void visitMainClass(final String mainClass) {
+        // Modules can only appear in V9 or more classes.
+        CheckMethodAdapter.checkInternalName(Opcodes.V9, mainClass, "module main class");
+        super.visitMainClass(mainClass);
+    }
+
+    @Override
+    public void visitPackage(final String packaze) {
+        CheckMethodAdapter.checkInternalName(Opcodes.V9, packaze, "module package");
+        super.visitPackage(packaze);
+    }
+
+    @Override
+    public void visitRequire(final String module, final int access, final String version) {
+        checkVisitEndNotCalled();
+        CheckClassAdapter.checkFullyQualifiedName(Opcodes.V9, module, "required module");
+        requiredModules.checkNameNotAlreadyDeclared(module);
+        CheckClassAdapter.checkAccess(
+                access,
+                Opcodes.ACC_STATIC_PHASE
+                        | Opcodes.ACC_TRANSITIVE
+                        | Opcodes.ACC_SYNTHETIC
+                        | Opcodes.ACC_MANDATED);
+        if (classVersion >= Opcodes.V10
+                && module.equals("java.base")
+                && (access & (Opcodes.ACC_STATIC_PHASE | Opcodes.ACC_TRANSITIVE)) != 0) {
+            throw new IllegalArgumentException(
+                    "Invalid access flags: "
+                            + access
+                            + " java.base can not be declared ACC_TRANSITIVE or ACC_STATIC_PHASE");
+        }
+        super.visitRequire(module, access, version);
+    }
+
+    @Override
+    public void visitExport(final String packaze, final int access, final String... modules) {
+        checkVisitEndNotCalled();
+        CheckMethodAdapter.checkInternalName(Opcodes.V9, packaze, "package name");
+        exportedPackages.checkNameNotAlreadyDeclared(packaze);
+        CheckClassAdapter.checkAccess(access, Opcodes.ACC_SYNTHETIC | Opcodes.ACC_MANDATED);
+        if (modules != null) {
+            for (String module : modules) {
+                CheckClassAdapter.checkFullyQualifiedName(Opcodes.V9, module, "module export to");
+            }
+        }
+        super.visitExport(packaze, access, modules);
+    }
+
+    @Override
+    public void visitOpen(final String packaze, final int access, final String... modules) {
+        checkVisitEndNotCalled();
+        if (isOpen) {
+            throw new UnsupportedOperationException("An open module can not use open directive");
+        }
+        CheckMethodAdapter.checkInternalName(Opcodes.V9, packaze, "package name");
+        openedPackages.checkNameNotAlreadyDeclared(packaze);
+        CheckClassAdapter.checkAccess(access, Opcodes.ACC_SYNTHETIC | Opcodes.ACC_MANDATED);
+        if (modules != null) {
+            for (String module : modules) {
+                CheckClassAdapter.checkFullyQualifiedName(Opcodes.V9, module, "module open to");
+            }
+        }
+        super.visitOpen(packaze, access, modules);
+    }
+
+    @Override
+    public void visitUse(final String service) {
+        checkVisitEndNotCalled();
+        CheckMethodAdapter.checkInternalName(Opcodes.V9, service, "service");
+        usedServices.checkNameNotAlreadyDeclared(service);
+        super.visitUse(service);
+    }
+
+    @Override
+    public void visitProvide(final String service, final String... providers) {
+        checkVisitEndNotCalled();
+        CheckMethodAdapter.checkInternalName(Opcodes.V9, service, "service");
+        providedServices.checkNameNotAlreadyDeclared(service);
+        if (providers == null || providers.length == 0) {
+            throw new IllegalArgumentException("Providers cannot be null or empty");
+        }
+        for (String provider : providers) {
+            CheckMethodAdapter.checkInternalName(Opcodes.V9, provider, "provider");
+        }
+        super.visitProvide(service, providers);
+    }
+
+    @Override
+    public void visitEnd() {
+        checkVisitEndNotCalled();
+        visitEndCalled = true;
+        super.visitEnd();
+    }
+
+    private void checkVisitEndNotCalled() {
+        if (visitEndCalled) {
+            throw new IllegalStateException("Cannot call a visit method after visitEnd has been called");
+        }
+    }
+
+    private static class NameSet {
+
+        private final String type;
+        private final HashSet<String> names;
+
+        NameSet(final String type) {
+            this.type = type;
+            this.names = new HashSet<>();
+        }
+
+        void checkNameNotAlreadyDeclared(final String name) {
+            if (!names.add(name)) {
+                throw new IllegalArgumentException(type + " '" + name + "' already declared");
+            }
+        }
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/org/objectweb/asm/util/CheckRecordComponentAdapter.class b/tests/test_data/std/jdk/internal/org/objectweb/asm/util/CheckRecordComponentAdapter.class
new file mode 100644
index 0000000000000000000000000000000000000000..d35c25e2114532546746a7586baea53ceba5849e
GIT binary patch
literal 3047
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zyAmP{dzUK9S>3R?WoWgmX;rgkX^EHZ+q{(3n)U33M%k?JW)$5(5^;1%kYps#&2S=Q
zYs=Pa+593eFJIzi)2igndc!ohVNX}I1`#rJ9n%fnKF*NK6lOxu9>JK?o4RdUxv{w<
zwm_E9Bcm6645=k;Ma$MSqnf?oRKk#`aywtsnoWj*%-Bp2;4J1O^fT-XRtvQnuWGfT
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HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/org/objectweb/asm/util/CheckRecordComponentAdapter.java b/tests/test_data/std/jdk/internal/org/objectweb/asm/util/CheckRecordComponentAdapter.java
new file mode 100644
index 00000000..850f1c8d
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/org/objectweb/asm/util/CheckRecordComponentAdapter.java
@@ -0,0 +1,153 @@
+/*
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/*
+ * This file is available under and governed by the GNU General Public
+ * License version 2 only, as published by the Free Software Foundation.
+ * However, the following notice accompanied the original version of this
+ * file:
+ *
+ * ASM: a very small and fast Java bytecode manipulation framework
+ * Copyright (c) 2000-2011 INRIA, France Telecom
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the copyright holders nor the names of its
+ *    contributors may be used to endorse or promote products derived from
+ *    this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+package jdk.internal.org.objectweb.asm.util;
+
+import jdk.internal.org.objectweb.asm.AnnotationVisitor;
+import jdk.internal.org.objectweb.asm.Attribute;
+import jdk.internal.org.objectweb.asm.Opcodes;
+import jdk.internal.org.objectweb.asm.RecordComponentVisitor;
+import jdk.internal.org.objectweb.asm.TypePath;
+import jdk.internal.org.objectweb.asm.TypeReference;
+
+/**
+ * A {@link RecordComponentVisitor} that checks that its methods are properly used.
+ *
+ * @author Eric Bruneton
+ * @author Remi Forax
+ */
+public class CheckRecordComponentAdapter extends RecordComponentVisitor {
+
+    /** Whether the {@link #visitEnd()} method has been called. */
+    private boolean visitEndCalled;
+
+    /**
+      * Constructs a new {@link CheckRecordComponentAdapter}. <i>Subclasses must not use this
+      * constructor</i>. Instead, they must use the {@link #CheckRecordComponentAdapter(int,
+      * RecordComponentVisitor)} version.
+      *
+      * @param recordComponentVisitor the record component visitor to which this adapter must delegate
+      *     calls.
+      * @throws IllegalStateException If a subclass calls this constructor.
+      */
+    public CheckRecordComponentAdapter(final RecordComponentVisitor recordComponentVisitor) {
+        this(/* latest api =*/ Opcodes.ASM9, recordComponentVisitor);
+        if (getClass() != CheckRecordComponentAdapter.class) {
+            throw new IllegalStateException();
+        }
+    }
+
+    /**
+      * Constructs a new {@link CheckRecordComponentAdapter}.
+      *
+      * @param api the ASM API version implemented by this visitor. Must be one of {@link Opcodes#ASM8}
+      *     or {@link Opcodes#ASM9}.
+      * @param recordComponentVisitor the record component visitor to which this adapter must delegate
+      *     calls.
+      */
+    protected CheckRecordComponentAdapter(
+            final int api, final RecordComponentVisitor recordComponentVisitor) {
+        super(api, recordComponentVisitor);
+    }
+
+    @Override
+    public AnnotationVisitor visitAnnotation(final String descriptor, final boolean visible) {
+        checkVisitEndNotCalled();
+        // Annotations can only appear in V1_5 or more classes.
+        CheckMethodAdapter.checkDescriptor(Opcodes.V1_5, descriptor, false);
+        return new CheckAnnotationAdapter(super.visitAnnotation(descriptor, visible));
+    }
+
+    @Override
+    public AnnotationVisitor visitTypeAnnotation(
+            final int typeRef, final TypePath typePath, final String descriptor, final boolean visible) {
+        checkVisitEndNotCalled();
+        int sort = new TypeReference(typeRef).getSort();
+        if (sort != TypeReference.FIELD) {
+            throw new IllegalArgumentException(
+                    "Invalid type reference sort 0x" + Integer.toHexString(sort));
+        }
+        CheckClassAdapter.checkTypeRef(typeRef);
+        CheckMethodAdapter.checkDescriptor(Opcodes.V1_5, descriptor, false);
+        return new CheckAnnotationAdapter(
+                super.visitTypeAnnotation(typeRef, typePath, descriptor, visible));
+    }
+
+    @Override
+    public void visitAttribute(final Attribute attribute) {
+        checkVisitEndNotCalled();
+        if (attribute == null) {
+            throw new IllegalArgumentException("Invalid attribute (must not be null)");
+        }
+        super.visitAttribute(attribute);
+    }
+
+    @Override
+    public void visitEnd() {
+        checkVisitEndNotCalled();
+        visitEndCalled = true;
+        super.visitEnd();
+    }
+
+    private void checkVisitEndNotCalled() {
+        if (visitEndCalled) {
+            throw new IllegalStateException("Cannot call a visit method after visitEnd has been called");
+        }
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/org/objectweb/asm/util/CheckSignatureAdapter$State.class b/tests/test_data/std/jdk/internal/org/objectweb/asm/util/CheckSignatureAdapter$State.class
new file mode 100644
index 0000000000000000000000000000000000000000..69d6bb78c66a4bbd7d9085e381402dc371dedada
GIT binary patch
literal 1814
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zO2)`@;T~4+;Ea@Pv{}p0>HmAo;0NUKBhKO{tl(!-<Th#~{FnF@hxiTO;TDxX(#=Md
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/org/objectweb/asm/util/CheckSignatureAdapter.class b/tests/test_data/std/jdk/internal/org/objectweb/asm/util/CheckSignatureAdapter.class
new file mode 100644
index 0000000000000000000000000000000000000000..1223afde8cdd6e9d59222f8c25417bbbaf801f50
GIT binary patch
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/org/objectweb/asm/util/CheckSignatureAdapter.java b/tests/test_data/std/jdk/internal/org/objectweb/asm/util/CheckSignatureAdapter.java
new file mode 100644
index 00000000..19a3998f
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/org/objectweb/asm/util/CheckSignatureAdapter.java
@@ -0,0 +1,391 @@
+/*
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/*
+ * This file is available under and governed by the GNU General Public
+ * License version 2 only, as published by the Free Software Foundation.
+ * However, the following notice accompanied the original version of this
+ * file:
+ *
+ * ASM: a very small and fast Java bytecode manipulation framework
+ * Copyright (c) 2000-2011 INRIA, France Telecom
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the copyright holders nor the names of its
+ *    contributors may be used to endorse or promote products derived from
+ *    this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+package jdk.internal.org.objectweb.asm.util;
+
+import java.util.EnumSet;
+import jdk.internal.org.objectweb.asm.Opcodes;
+import jdk.internal.org.objectweb.asm.signature.SignatureVisitor;
+
+/**
+ * A {@link SignatureVisitor} that checks that its methods are properly used.
+ *
+ * @author Eric Bruneton
+ */
+public class CheckSignatureAdapter extends SignatureVisitor {
+
+    /**
+      * Type to be used to check class signatures. See {@link #CheckSignatureAdapter(int,
+      * SignatureVisitor)}.
+      */
+    public static final int CLASS_SIGNATURE = 0;
+
+    /**
+      * Type to be used to check method signatures. See {@link #CheckSignatureAdapter(int,
+      * SignatureVisitor)}.
+      */
+    public static final int METHOD_SIGNATURE = 1;
+
+    /**
+      * Type to be used to check type signatures.See {@link #CheckSignatureAdapter(int,
+      * SignatureVisitor)}.
+      */
+    public static final int TYPE_SIGNATURE = 2;
+
+    /** The valid automaton states for a {@link #visitFormalTypeParameter} method call. */
+    private static final EnumSet<State> VISIT_FORMAL_TYPE_PARAMETER_STATES =
+            EnumSet.of(State.EMPTY, State.FORMAL, State.BOUND);
+
+    /** The valid automaton states for a {@link #visitClassBound} method call. */
+    private static final EnumSet<State> VISIT_CLASS_BOUND_STATES = EnumSet.of(State.FORMAL);
+
+    /** The valid automaton states for a {@link #visitInterfaceBound} method call. */
+    private static final EnumSet<State> VISIT_INTERFACE_BOUND_STATES =
+            EnumSet.of(State.FORMAL, State.BOUND);
+
+    /** The valid automaton states for a {@link #visitSuperclass} method call. */
+    private static final EnumSet<State> VISIT_SUPER_CLASS_STATES =
+            EnumSet.of(State.EMPTY, State.FORMAL, State.BOUND);
+
+    /** The valid automaton states for a {@link #visitInterface} method call. */
+    private static final EnumSet<State> VISIT_INTERFACE_STATES = EnumSet.of(State.SUPER);
+
+    /** The valid automaton states for a {@link #visitParameterType} method call. */
+    private static final EnumSet<State> VISIT_PARAMETER_TYPE_STATES =
+            EnumSet.of(State.EMPTY, State.FORMAL, State.BOUND, State.PARAM);
+
+    /** The valid automaton states for a {@link #visitReturnType} method call. */
+    private static final EnumSet<State> VISIT_RETURN_TYPE_STATES =
+            EnumSet.of(State.EMPTY, State.FORMAL, State.BOUND, State.PARAM);
+
+    /** The valid automaton states for a {@link #visitExceptionType} method call. */
+    private static final EnumSet<State> VISIT_EXCEPTION_TYPE_STATES = EnumSet.of(State.RETURN);
+
+    /** The possible states of the automaton used to check the order of method calls. */
+    private enum State {
+        EMPTY,
+        FORMAL,
+        BOUND,
+        SUPER,
+        PARAM,
+        RETURN,
+        SIMPLE_TYPE,
+        CLASS_TYPE,
+        END;
+    }
+
+    private static final String INVALID = "Invalid ";
+
+    /** The type of the visited signature. */
+    private final int type;
+
+    /** The current state of the automaton used to check the order of method calls. */
+    private State state;
+
+    /** Whether the visited signature can be 'V'. */
+    private boolean canBeVoid;
+
+    /** The visitor to which this adapter must delegate calls. May be {@literal null}. */
+    private final SignatureVisitor signatureVisitor;
+
+    /**
+      * Constructs a new {@link CheckSignatureAdapter}. <i>Subclasses must not use this
+      * constructor</i>. Instead, they must use the {@link #CheckSignatureAdapter(int, int,
+      * SignatureVisitor)} version.
+      *
+      * @param type the type of signature to be checked. See {@link #CLASS_SIGNATURE}, {@link
+      *     #METHOD_SIGNATURE} and {@link #TYPE_SIGNATURE}.
+      * @param signatureVisitor the visitor to which this adapter must delegate calls. May be {@literal
+      *     null}.
+      */
+    public CheckSignatureAdapter(final int type, final SignatureVisitor signatureVisitor) {
+        this(/* latest api = */ Opcodes.ASM9, type, signatureVisitor);
+    }
+
+    /**
+      * Constructs a new {@link CheckSignatureAdapter}.
+      *
+      * @param api the ASM API version implemented by this visitor. Must be one of the {@code
+      *     ASM}<i>x</i> values in {@link Opcodes}.
+      * @param type the type of signature to be checked. See {@link #CLASS_SIGNATURE}, {@link
+      *     #METHOD_SIGNATURE} and {@link #TYPE_SIGNATURE}.
+      * @param signatureVisitor the visitor to which this adapter must delegate calls. May be {@literal
+      *     null}.
+      */
+    protected CheckSignatureAdapter(
+            final int api, final int type, final SignatureVisitor signatureVisitor) {
+        super(api);
+        this.type = type;
+        this.state = State.EMPTY;
+        this.signatureVisitor = signatureVisitor;
+    }
+
+    // class and method signatures
+
+    @Override
+    public void visitFormalTypeParameter(final String name) {
+        if (type == TYPE_SIGNATURE || !VISIT_FORMAL_TYPE_PARAMETER_STATES.contains(state)) {
+            throw new IllegalStateException();
+        }
+        checkIdentifier(name, "formal type parameter");
+        state = State.FORMAL;
+        if (signatureVisitor != null) {
+            signatureVisitor.visitFormalTypeParameter(name);
+        }
+    }
+
+    @Override
+    public SignatureVisitor visitClassBound() {
+        if (type == TYPE_SIGNATURE || !VISIT_CLASS_BOUND_STATES.contains(state)) {
+            throw new IllegalStateException();
+        }
+        state = State.BOUND;
+        return new CheckSignatureAdapter(
+                TYPE_SIGNATURE, signatureVisitor == null ? null : signatureVisitor.visitClassBound());
+    }
+
+    @Override
+    public SignatureVisitor visitInterfaceBound() {
+        if (type == TYPE_SIGNATURE || !VISIT_INTERFACE_BOUND_STATES.contains(state)) {
+            throw new IllegalStateException();
+        }
+        return new CheckSignatureAdapter(
+                TYPE_SIGNATURE, signatureVisitor == null ? null : signatureVisitor.visitInterfaceBound());
+    }
+
+    // class signatures
+
+    @Override
+    public SignatureVisitor visitSuperclass() {
+        if (type != CLASS_SIGNATURE || !VISIT_SUPER_CLASS_STATES.contains(state)) {
+            throw new IllegalStateException();
+        }
+        state = State.SUPER;
+        return new CheckSignatureAdapter(
+                TYPE_SIGNATURE, signatureVisitor == null ? null : signatureVisitor.visitSuperclass());
+    }
+
+    @Override
+    public SignatureVisitor visitInterface() {
+        if (type != CLASS_SIGNATURE || !VISIT_INTERFACE_STATES.contains(state)) {
+            throw new IllegalStateException();
+        }
+        return new CheckSignatureAdapter(
+                TYPE_SIGNATURE, signatureVisitor == null ? null : signatureVisitor.visitInterface());
+    }
+
+    // method signatures
+
+    @Override
+    public SignatureVisitor visitParameterType() {
+        if (type != METHOD_SIGNATURE || !VISIT_PARAMETER_TYPE_STATES.contains(state)) {
+            throw new IllegalStateException();
+        }
+        state = State.PARAM;
+        return new CheckSignatureAdapter(
+                TYPE_SIGNATURE, signatureVisitor == null ? null : signatureVisitor.visitParameterType());
+    }
+
+    @Override
+    public SignatureVisitor visitReturnType() {
+        if (type != METHOD_SIGNATURE || !VISIT_RETURN_TYPE_STATES.contains(state)) {
+            throw new IllegalStateException();
+        }
+        state = State.RETURN;
+        CheckSignatureAdapter checkSignatureAdapter =
+                new CheckSignatureAdapter(
+                        TYPE_SIGNATURE, signatureVisitor == null ? null : signatureVisitor.visitReturnType());
+        checkSignatureAdapter.canBeVoid = true;
+        return checkSignatureAdapter;
+    }
+
+    @Override
+    public SignatureVisitor visitExceptionType() {
+        if (type != METHOD_SIGNATURE || !VISIT_EXCEPTION_TYPE_STATES.contains(state)) {
+            throw new IllegalStateException();
+        }
+        return new CheckSignatureAdapter(
+                TYPE_SIGNATURE, signatureVisitor == null ? null : signatureVisitor.visitExceptionType());
+    }
+
+    // type signatures
+
+    @Override
+    public void visitBaseType(final char descriptor) {
+        if (type != TYPE_SIGNATURE || state != State.EMPTY) {
+            throw new IllegalStateException();
+        }
+        if (descriptor == 'V') {
+            if (!canBeVoid) {
+                throw new IllegalArgumentException("Base type descriptor can't be V");
+            }
+        } else {
+            if ("ZCBSIFJD".indexOf(descriptor) == -1) {
+                throw new IllegalArgumentException("Base type descriptor must be one of ZCBSIFJD");
+            }
+        }
+        state = State.SIMPLE_TYPE;
+        if (signatureVisitor != null) {
+            signatureVisitor.visitBaseType(descriptor);
+        }
+    }
+
+    @Override
+    public void visitTypeVariable(final String name) {
+        if (type != TYPE_SIGNATURE || state != State.EMPTY) {
+            throw new IllegalStateException();
+        }
+        checkIdentifier(name, "type variable");
+        state = State.SIMPLE_TYPE;
+        if (signatureVisitor != null) {
+            signatureVisitor.visitTypeVariable(name);
+        }
+    }
+
+    @Override
+    public SignatureVisitor visitArrayType() {
+        if (type != TYPE_SIGNATURE || state != State.EMPTY) {
+            throw new IllegalStateException();
+        }
+        state = State.SIMPLE_TYPE;
+        return new CheckSignatureAdapter(
+                TYPE_SIGNATURE, signatureVisitor == null ? null : signatureVisitor.visitArrayType());
+    }
+
+    @Override
+    public void visitClassType(final String name) {
+        if (type != TYPE_SIGNATURE || state != State.EMPTY) {
+            throw new IllegalStateException();
+        }
+        checkClassName(name, "class name");
+        state = State.CLASS_TYPE;
+        if (signatureVisitor != null) {
+            signatureVisitor.visitClassType(name);
+        }
+    }
+
+    @Override
+    public void visitInnerClassType(final String name) {
+        if (state != State.CLASS_TYPE) {
+            throw new IllegalStateException();
+        }
+        checkIdentifier(name, "inner class name");
+        if (signatureVisitor != null) {
+            signatureVisitor.visitInnerClassType(name);
+        }
+    }
+
+    @Override
+    public void visitTypeArgument() {
+        if (state != State.CLASS_TYPE) {
+            throw new IllegalStateException();
+        }
+        if (signatureVisitor != null) {
+            signatureVisitor.visitTypeArgument();
+        }
+    }
+
+    @Override
+    public SignatureVisitor visitTypeArgument(final char wildcard) {
+        if (state != State.CLASS_TYPE) {
+            throw new IllegalStateException();
+        }
+        if ("+-=".indexOf(wildcard) == -1) {
+            throw new IllegalArgumentException("Wildcard must be one of +-=");
+        }
+        return new CheckSignatureAdapter(
+                TYPE_SIGNATURE,
+                signatureVisitor == null ? null : signatureVisitor.visitTypeArgument(wildcard));
+    }
+
+    @Override
+    public void visitEnd() {
+        if (state != State.CLASS_TYPE) {
+            throw new IllegalStateException();
+        }
+        state = State.END;
+        if (signatureVisitor != null) {
+            signatureVisitor.visitEnd();
+        }
+    }
+
+    private void checkClassName(final String name, final String message) {
+        if (name == null || name.length() == 0) {
+            throw new IllegalArgumentException(INVALID + message + " (must not be null or empty)");
+        }
+        for (int i = 0; i < name.length(); ++i) {
+            if (".;[<>:".indexOf(name.charAt(i)) != -1) {
+                throw new IllegalArgumentException(
+                        INVALID + message + " (must not contain . ; [ < > or :): " + name);
+            }
+        }
+    }
+
+    private void checkIdentifier(final String name, final String message) {
+        if (name == null || name.length() == 0) {
+            throw new IllegalArgumentException(INVALID + message + " (must not be null or empty)");
+        }
+        for (int i = 0; i < name.length(); ++i) {
+            if (".;[/<>:".indexOf(name.charAt(i)) != -1) {
+                throw new IllegalArgumentException(
+                        INVALID + message + " (must not contain . ; [ / < > or :): " + name);
+            }
+        }
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/org/objectweb/asm/util/Printer.class b/tests/test_data/std/jdk/internal/org/objectweb/asm/util/Printer.class
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HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/org/objectweb/asm/util/Printer.java b/tests/test_data/std/jdk/internal/org/objectweb/asm/util/Printer.java
new file mode 100644
index 00000000..00378e8d
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/org/objectweb/asm/util/Printer.java
@@ -0,0 +1,1342 @@
+/*
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/*
+ * This file is available under and governed by the GNU General Public
+ * License version 2 only, as published by the Free Software Foundation.
+ * However, the following notice accompanied the original version of this
+ * file:
+ *
+ * ASM: a very small and fast Java bytecode manipulation framework
+ * Copyright (c) 2000-2011 INRIA, France Telecom
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the copyright holders nor the names of its
+ *    contributors may be used to endorse or promote products derived from
+ *    this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+package jdk.internal.org.objectweb.asm.util;
+
+import java.io.FileInputStream;
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.PrintWriter;
+import java.util.ArrayList;
+import java.util.List;
+import jdk.internal.org.objectweb.asm.Attribute;
+import jdk.internal.org.objectweb.asm.ClassReader;
+import jdk.internal.org.objectweb.asm.ConstantDynamic;
+import jdk.internal.org.objectweb.asm.Handle;
+import jdk.internal.org.objectweb.asm.Label;
+import jdk.internal.org.objectweb.asm.Opcodes;
+import jdk.internal.org.objectweb.asm.Type;
+import jdk.internal.org.objectweb.asm.TypePath;
+import jdk.internal.org.objectweb.asm.TypeReference;
+
+/**
+ * An abstract converter from visit events to text.
+ *
+ * @author Eric Bruneton
+ */
+public abstract class Printer {
+
+    /** The names of the Java Virtual Machine opcodes. */
+    public static final String[] OPCODES = {
+        "NOP", // 0 (0x0)
+        "ACONST_NULL", // 1 (0x1)
+        "ICONST_M1", // 2 (0x2)
+        "ICONST_0", // 3 (0x3)
+        "ICONST_1", // 4 (0x4)
+        "ICONST_2", // 5 (0x5)
+        "ICONST_3", // 6 (0x6)
+        "ICONST_4", // 7 (0x7)
+        "ICONST_5", // 8 (0x8)
+        "LCONST_0", // 9 (0x9)
+        "LCONST_1", // 10 (0xa)
+        "FCONST_0", // 11 (0xb)
+        "FCONST_1", // 12 (0xc)
+        "FCONST_2", // 13 (0xd)
+        "DCONST_0", // 14 (0xe)
+        "DCONST_1", // 15 (0xf)
+        "BIPUSH", // 16 (0x10)
+        "SIPUSH", // 17 (0x11)
+        "LDC", // 18 (0x12)
+        "LDC_W", // 19 (0x13)
+        "LDC2_W", // 20 (0x14)
+        "ILOAD", // 21 (0x15)
+        "LLOAD", // 22 (0x16)
+        "FLOAD", // 23 (0x17)
+        "DLOAD", // 24 (0x18)
+        "ALOAD", // 25 (0x19)
+        "ILOAD_0", // 26 (0x1a)
+        "ILOAD_1", // 27 (0x1b)
+        "ILOAD_2", // 28 (0x1c)
+        "ILOAD_3", // 29 (0x1d)
+        "LLOAD_0", // 30 (0x1e)
+        "LLOAD_1", // 31 (0x1f)
+        "LLOAD_2", // 32 (0x20)
+        "LLOAD_3", // 33 (0x21)
+        "FLOAD_0", // 34 (0x22)
+        "FLOAD_1", // 35 (0x23)
+        "FLOAD_2", // 36 (0x24)
+        "FLOAD_3", // 37 (0x25)
+        "DLOAD_0", // 38 (0x26)
+        "DLOAD_1", // 39 (0x27)
+        "DLOAD_2", // 40 (0x28)
+        "DLOAD_3", // 41 (0x29)
+        "ALOAD_0", // 42 (0x2a)
+        "ALOAD_1", // 43 (0x2b)
+        "ALOAD_2", // 44 (0x2c)
+        "ALOAD_3", // 45 (0x2d)
+        "IALOAD", // 46 (0x2e)
+        "LALOAD", // 47 (0x2f)
+        "FALOAD", // 48 (0x30)
+        "DALOAD", // 49 (0x31)
+        "AALOAD", // 50 (0x32)
+        "BALOAD", // 51 (0x33)
+        "CALOAD", // 52 (0x34)
+        "SALOAD", // 53 (0x35)
+        "ISTORE", // 54 (0x36)
+        "LSTORE", // 55 (0x37)
+        "FSTORE", // 56 (0x38)
+        "DSTORE", // 57 (0x39)
+        "ASTORE", // 58 (0x3a)
+        "ISTORE_0", // 59 (0x3b)
+        "ISTORE_1", // 60 (0x3c)
+        "ISTORE_2", // 61 (0x3d)
+        "ISTORE_3", // 62 (0x3e)
+        "LSTORE_0", // 63 (0x3f)
+        "LSTORE_1", // 64 (0x40)
+        "LSTORE_2", // 65 (0x41)
+        "LSTORE_3", // 66 (0x42)
+        "FSTORE_0", // 67 (0x43)
+        "FSTORE_1", // 68 (0x44)
+        "FSTORE_2", // 69 (0x45)
+        "FSTORE_3", // 70 (0x46)
+        "DSTORE_0", // 71 (0x47)
+        "DSTORE_1", // 72 (0x48)
+        "DSTORE_2", // 73 (0x49)
+        "DSTORE_3", // 74 (0x4a)
+        "ASTORE_0", // 75 (0x4b)
+        "ASTORE_1", // 76 (0x4c)
+        "ASTORE_2", // 77 (0x4d)
+        "ASTORE_3", // 78 (0x4e)
+        "IASTORE", // 79 (0x4f)
+        "LASTORE", // 80 (0x50)
+        "FASTORE", // 81 (0x51)
+        "DASTORE", // 82 (0x52)
+        "AASTORE", // 83 (0x53)
+        "BASTORE", // 84 (0x54)
+        "CASTORE", // 85 (0x55)
+        "SASTORE", // 86 (0x56)
+        "POP", // 87 (0x57)
+        "POP2", // 88 (0x58)
+        "DUP", // 89 (0x59)
+        "DUP_X1", // 90 (0x5a)
+        "DUP_X2", // 91 (0x5b)
+        "DUP2", // 92 (0x5c)
+        "DUP2_X1", // 93 (0x5d)
+        "DUP2_X2", // 94 (0x5e)
+        "SWAP", // 95 (0x5f)
+        "IADD", // 96 (0x60)
+        "LADD", // 97 (0x61)
+        "FADD", // 98 (0x62)
+        "DADD", // 99 (0x63)
+        "ISUB", // 100 (0x64)
+        "LSUB", // 101 (0x65)
+        "FSUB", // 102 (0x66)
+        "DSUB", // 103 (0x67)
+        "IMUL", // 104 (0x68)
+        "LMUL", // 105 (0x69)
+        "FMUL", // 106 (0x6a)
+        "DMUL", // 107 (0x6b)
+        "IDIV", // 108 (0x6c)
+        "LDIV", // 109 (0x6d)
+        "FDIV", // 110 (0x6e)
+        "DDIV", // 111 (0x6f)
+        "IREM", // 112 (0x70)
+        "LREM", // 113 (0x71)
+        "FREM", // 114 (0x72)
+        "DREM", // 115 (0x73)
+        "INEG", // 116 (0x74)
+        "LNEG", // 117 (0x75)
+        "FNEG", // 118 (0x76)
+        "DNEG", // 119 (0x77)
+        "ISHL", // 120 (0x78)
+        "LSHL", // 121 (0x79)
+        "ISHR", // 122 (0x7a)
+        "LSHR", // 123 (0x7b)
+        "IUSHR", // 124 (0x7c)
+        "LUSHR", // 125 (0x7d)
+        "IAND", // 126 (0x7e)
+        "LAND", // 127 (0x7f)
+        "IOR", // 128 (0x80)
+        "LOR", // 129 (0x81)
+        "IXOR", // 130 (0x82)
+        "LXOR", // 131 (0x83)
+        "IINC", // 132 (0x84)
+        "I2L", // 133 (0x85)
+        "I2F", // 134 (0x86)
+        "I2D", // 135 (0x87)
+        "L2I", // 136 (0x88)
+        "L2F", // 137 (0x89)
+        "L2D", // 138 (0x8a)
+        "F2I", // 139 (0x8b)
+        "F2L", // 140 (0x8c)
+        "F2D", // 141 (0x8d)
+        "D2I", // 142 (0x8e)
+        "D2L", // 143 (0x8f)
+        "D2F", // 144 (0x90)
+        "I2B", // 145 (0x91)
+        "I2C", // 146 (0x92)
+        "I2S", // 147 (0x93)
+        "LCMP", // 148 (0x94)
+        "FCMPL", // 149 (0x95)
+        "FCMPG", // 150 (0x96)
+        "DCMPL", // 151 (0x97)
+        "DCMPG", // 152 (0x98)
+        "IFEQ", // 153 (0x99)
+        "IFNE", // 154 (0x9a)
+        "IFLT", // 155 (0x9b)
+        "IFGE", // 156 (0x9c)
+        "IFGT", // 157 (0x9d)
+        "IFLE", // 158 (0x9e)
+        "IF_ICMPEQ", // 159 (0x9f)
+        "IF_ICMPNE", // 160 (0xa0)
+        "IF_ICMPLT", // 161 (0xa1)
+        "IF_ICMPGE", // 162 (0xa2)
+        "IF_ICMPGT", // 163 (0xa3)
+        "IF_ICMPLE", // 164 (0xa4)
+        "IF_ACMPEQ", // 165 (0xa5)
+        "IF_ACMPNE", // 166 (0xa6)
+        "GOTO", // 167 (0xa7)
+        "JSR", // 168 (0xa8)
+        "RET", // 169 (0xa9)
+        "TABLESWITCH", // 170 (0xaa)
+        "LOOKUPSWITCH", // 171 (0xab)
+        "IRETURN", // 172 (0xac)
+        "LRETURN", // 173 (0xad)
+        "FRETURN", // 174 (0xae)
+        "DRETURN", // 175 (0xaf)
+        "ARETURN", // 176 (0xb0)
+        "RETURN", // 177 (0xb1)
+        "GETSTATIC", // 178 (0xb2)
+        "PUTSTATIC", // 179 (0xb3)
+        "GETFIELD", // 180 (0xb4)
+        "PUTFIELD", // 181 (0xb5)
+        "INVOKEVIRTUAL", // 182 (0xb6)
+        "INVOKESPECIAL", // 183 (0xb7)
+        "INVOKESTATIC", // 184 (0xb8)
+        "INVOKEINTERFACE", // 185 (0xb9)
+        "INVOKEDYNAMIC", // 186 (0xba)
+        "NEW", // 187 (0xbb)
+        "NEWARRAY", // 188 (0xbc)
+        "ANEWARRAY", // 189 (0xbd)
+        "ARRAYLENGTH", // 190 (0xbe)
+        "ATHROW", // 191 (0xbf)
+        "CHECKCAST", // 192 (0xc0)
+        "INSTANCEOF", // 193 (0xc1)
+        "MONITORENTER", // 194 (0xc2)
+        "MONITOREXIT", // 195 (0xc3)
+        "WIDE", // 196 (0xc4)
+        "MULTIANEWARRAY", // 197 (0xc5)
+        "IFNULL", // 198 (0xc6)
+        "IFNONNULL" // 199 (0xc7)
+    };
+
+    /**
+      * The names of the {@code operand} values of the {@link
+      * jdk.internal.org.objectweb.asm.MethodVisitor#visitIntInsn} method when {@code opcode} is {@code NEWARRAY}.
+      */
+    public static final String[] TYPES = {
+        "",
+        "",
+        "",
+        "",
+        "T_BOOLEAN",
+        "T_CHAR",
+        "T_FLOAT",
+        "T_DOUBLE",
+        "T_BYTE",
+        "T_SHORT",
+        "T_INT",
+        "T_LONG"
+    };
+
+    /** The names of the {@code tag} field values for {@link jdk.internal.org.objectweb.asm.Handle}. */
+    public static final String[] HANDLE_TAG = {
+        "",
+        "H_GETFIELD",
+        "H_GETSTATIC",
+        "H_PUTFIELD",
+        "H_PUTSTATIC",
+        "H_INVOKEVIRTUAL",
+        "H_INVOKESTATIC",
+        "H_INVOKESPECIAL",
+        "H_NEWINVOKESPECIAL",
+        "H_INVOKEINTERFACE"
+    };
+
+    /** Message of the UnsupportedOperationException thrown by methods which must be overridden. */
+    private static final String UNSUPPORTED_OPERATION = "Must be overridden";
+
+    /**
+      * The ASM API version implemented by this class. The value of this field must be one of the
+      * {@code ASM}<i>x</i> values in {@link Opcodes}.
+      */
+    protected final int api;
+
+    /** The builder used to build strings in the various visit methods. */
+    protected final StringBuilder stringBuilder;
+
+    /**
+      * The text to be printed. Since the code of methods is not necessarily visited in sequential
+      * order, one method after the other, but can be interlaced (some instructions from method one,
+      * then some instructions from method two, then some instructions from method one again...), it is
+      * not possible to print the visited instructions directly to a sequential stream. A class is
+      * therefore printed in a two steps process: a string tree is constructed during the visit, and
+      * printed to a sequential stream at the end of the visit. This string tree is stored in this
+      * field, as a string list that can contain other string lists, which can themselves contain other
+      * string lists, and so on.
+      */
+    public final List<Object> text;
+
+    // -----------------------------------------------------------------------------------------------
+    // Constructor
+    // -----------------------------------------------------------------------------------------------
+
+    /**
+      * Constructs a new {@link Printer}.
+      *
+      * @param api the ASM API version implemented by this printer. Must be one of the {@code
+      *     ASM}<i>x</i> values in {@link Opcodes}.
+      */
+    protected Printer(final int api) {
+        this.api = api;
+        this.stringBuilder = new StringBuilder();
+        this.text = new ArrayList<>();
+    }
+
+    // -----------------------------------------------------------------------------------------------
+    // Classes
+    // -----------------------------------------------------------------------------------------------
+
+    /**
+      * Class header. See {@link jdk.internal.org.objectweb.asm.ClassVisitor#visit}.
+      *
+      * @param version the class version. The minor version is stored in the 16 most significant bits,
+      *     and the major version in the 16 least significant bits.
+      * @param access the class's access flags (see {@link Opcodes}). This parameter also indicates if
+      *     the class is deprecated.
+      * @param name the internal name of the class (see {@link Type#getInternalName()}).
+      * @param signature the signature of this class. May be {@literal null} if the class is not a
+      *     generic one, and does not extend or implement generic classes or interfaces.
+      * @param superName the internal of name of the super class (see {@link Type#getInternalName()}).
+      *     For interfaces, the super class is {@link Object}. May be {@literal null}, but only for the
+      *     {@link Object} class.
+      * @param interfaces the internal names of the class's interfaces (see {@link
+      *     Type#getInternalName()}). May be {@literal null}.
+      */
+    public abstract void visit(
+            int version,
+            int access,
+            String name,
+            String signature,
+            String superName,
+            String[] interfaces);
+
+    /**
+      * Class source. See {@link jdk.internal.org.objectweb.asm.ClassVisitor#visitSource}.
+      *
+      * @param source the name of the source file from which the class was compiled. May be {@literal
+      *     null}.
+      * @param debug additional debug information to compute the correspondence between source and
+      *     compiled elements of the class. May be {@literal null}.
+      */
+    public abstract void visitSource(String source, String debug);
+
+    /**
+      * Module. See {@link jdk.internal.org.objectweb.asm.ClassVisitor#visitModule}.
+      *
+      * @param name the fully qualified name (using dots) of the module.
+      * @param access the module access flags, among {@code ACC_OPEN}, {@code ACC_SYNTHETIC} and {@code
+      *     ACC_MANDATED}.
+      * @param version the module version, or {@literal null}.
+      * @return the printer.
+      */
+    public Printer visitModule(final String name, final int access, final String version) {
+        throw new UnsupportedOperationException(UNSUPPORTED_OPERATION);
+    }
+
+    /**
+      * Visits the nest host class of the class. A nest is a set of classes of the same package that
+      * share access to their private members. One of these classes, called the host, lists the other
+      * members of the nest, which in turn should link to the host of their nest. This method must be
+      * called only once and only if the visited class is a non-host member of a nest. A class is
+      * implicitly its own nest, so it's invalid to call this method with the visited class name as
+      * argument.
+      *
+      * @param nestHost the internal name of the host class of the nest (see {@link
+      *     Type#getInternalName()}).
+      */
+    public void visitNestHost(final String nestHost) {
+        throw new UnsupportedOperationException(UNSUPPORTED_OPERATION);
+    }
+
+    /**
+      * Class outer class. See {@link jdk.internal.org.objectweb.asm.ClassVisitor#visitOuterClass}.
+      *
+      * @param owner internal name of the enclosing class of the class (see {@link
+      *     Type#getInternalName()}).
+      * @param name the name of the method that contains the class, or {@literal null} if the class is
+      *     not enclosed in a method of its enclosing class.
+      * @param descriptor the descriptor of the method that contains the class, or {@literal null} if
+      *     the class is not enclosed in a method of its enclosing class.
+      */
+    public abstract void visitOuterClass(String owner, String name, String descriptor);
+
+    /**
+      * Class annotation. See {@link jdk.internal.org.objectweb.asm.ClassVisitor#visitAnnotation}.
+      *
+      * @param descriptor the class descriptor of the annotation class.
+      * @param visible {@literal true} if the annotation is visible at runtime.
+      * @return the printer.
+      */
+    public abstract Printer visitClassAnnotation(String descriptor, boolean visible);
+
+    /**
+      * Class type annotation. See {@link jdk.internal.org.objectweb.asm.ClassVisitor#visitTypeAnnotation}.
+      *
+      * @param typeRef a reference to the annotated type. The sort of this type reference must be
+      *     {@link TypeReference#CLASS_TYPE_PARAMETER}, {@link
+      *     TypeReference#CLASS_TYPE_PARAMETER_BOUND} or {@link TypeReference#CLASS_EXTENDS}. See
+      *     {@link TypeReference}.
+      * @param typePath the path to the annotated type argument, wildcard bound, array element type, or
+      *     static inner type within 'typeRef'. May be {@literal null} if the annotation targets
+      *     'typeRef' as a whole.
+      * @param descriptor the class descriptor of the annotation class.
+      * @param visible {@literal true} if the annotation is visible at runtime.
+      * @return the printer.
+      */
+    public Printer visitClassTypeAnnotation(
+            final int typeRef, final TypePath typePath, final String descriptor, final boolean visible) {
+        throw new UnsupportedOperationException(UNSUPPORTED_OPERATION);
+    }
+
+    /**
+      * Class attribute. See {@link jdk.internal.org.objectweb.asm.ClassVisitor#visitAttribute}.
+      *
+      * @param attribute an attribute.
+      */
+    public abstract void visitClassAttribute(Attribute attribute);
+
+    /**
+      * Visits a member of the nest. A nest is a set of classes of the same package that share access
+      * to their private members. One of these classes, called the host, lists the other members of the
+      * nest, which in turn should link to the host of their nest. This method must be called only if
+      * the visited class is the host of a nest. A nest host is implicitly a member of its own nest, so
+      * it's invalid to call this method with the visited class name as argument.
+      *
+      * @param nestMember the internal name of a nest member (see {@link Type#getInternalName()}).
+      */
+    public void visitNestMember(final String nestMember) {
+        throw new UnsupportedOperationException(UNSUPPORTED_OPERATION);
+    }
+
+    /**
+      * Visits a permitted subclasses. A permitted subclass is one of the allowed subclasses of the
+      * current class. See {@link jdk.internal.org.objectweb.asm.ClassVisitor#visitPermittedSubclass(String)}.
+      *
+      * @param permittedSubclass the internal name of a permitted subclass (see {@link
+      *     Type#getInternalName()}).
+      */
+    public void visitPermittedSubclass(final String permittedSubclass) {
+        throw new UnsupportedOperationException(UNSUPPORTED_OPERATION);
+    }
+
+    /**
+      * Class inner name. See {@link jdk.internal.org.objectweb.asm.ClassVisitor#visitInnerClass}.
+      *
+      * @param name the internal name of an inner class (see {@link Type#getInternalName()}).
+      * @param outerName the internal name of the class to which the inner class belongs (see {@link
+      *     Type#getInternalName()}). May be {@literal null} for not member classes.
+      * @param innerName the (simple) name of the inner class inside its enclosing class. May be
+      *     {@literal null} for anonymous inner classes.
+      * @param access the access flags of the inner class as originally declared in the enclosing
+      *     class.
+      */
+    public abstract void visitInnerClass(String name, String outerName, String innerName, int access);
+
+    /**
+      * Visits a record component of the class. See {@link
+      * jdk.internal.org.objectweb.asm.ClassVisitor#visitRecordComponent(String, String, String)}.
+      *
+      * @param name the field's name.
+      * @param descriptor the record component descriptor (see {@link Type}).
+      * @param signature the record component signature. May be {@literal null} if the record component
+      *     type does not use generic types.
+      * @return a visitor to visit this record component annotations and attributes, or {@literal null}
+      *     if this class visitor is not interested in visiting these annotations and attributes.
+      */
+    public Printer visitRecordComponent(
+            final String name, final String descriptor, final String signature) {
+        throw new UnsupportedOperationException(UNSUPPORTED_OPERATION);
+    }
+
+    /**
+      * Class field. See {@link jdk.internal.org.objectweb.asm.ClassVisitor#visitField}.
+      *
+      * @param access the field's access flags (see {@link Opcodes}). This parameter also indicates if
+      *     the field is synthetic and/or deprecated.
+      * @param name the field's name.
+      * @param descriptor the field's descriptor (see {@link Type}).
+      * @param signature the field's signature. May be {@literal null} if the field's type does not use
+      *     generic types.
+      * @param value the field's initial value. This parameter, which may be {@literal null} if the
+      *     field does not have an initial value, must be an {@link Integer}, a {@link Float}, a {@link
+      *     Long}, a {@link Double} or a {@link String} (for {@code int}, {@code float}, {@code long}
+      *     or {@code String} fields respectively). <i>This parameter is only used for static
+      *     fields</i>. Its value is ignored for non static fields, which must be initialized through
+      *     bytecode instructions in constructors or methods.
+      * @return the printer.
+      */
+    public abstract Printer visitField(
+            int access, String name, String descriptor, String signature, Object value);
+
+    /**
+      * Class method. See {@link jdk.internal.org.objectweb.asm.ClassVisitor#visitMethod}.
+      *
+      * @param access the method's access flags (see {@link Opcodes}). This parameter also indicates if
+      *     the method is synthetic and/or deprecated.
+      * @param name the method's name.
+      * @param descriptor the method's descriptor (see {@link Type}).
+      * @param signature the method's signature. May be {@literal null} if the method parameters,
+      *     return type and exceptions do not use generic types.
+      * @param exceptions the internal names of the method's exception classes (see {@link
+      *     Type#getInternalName()}). May be {@literal null}.
+      * @return the printer.
+      */
+    public abstract Printer visitMethod(
+            int access, String name, String descriptor, String signature, String[] exceptions);
+
+    /** Class end. See {@link jdk.internal.org.objectweb.asm.ClassVisitor#visitEnd}. */
+    public abstract void visitClassEnd();
+
+    // -----------------------------------------------------------------------------------------------
+    // Modules
+    // -----------------------------------------------------------------------------------------------
+
+    /**
+      * Module main class. See {@link jdk.internal.org.objectweb.asm.ModuleVisitor#visitMainClass}.
+      *
+      * @param mainClass the internal name of the main class of the current module (see {@link
+      *     Type#getInternalName()}).
+      */
+    public void visitMainClass(final String mainClass) {
+        throw new UnsupportedOperationException(UNSUPPORTED_OPERATION);
+    }
+
+    /**
+      * Module package. See {@link jdk.internal.org.objectweb.asm.ModuleVisitor#visitPackage}.
+      *
+      * @param packaze the internal name of a package (see {@link Type#getInternalName()}).
+      */
+    public void visitPackage(final String packaze) {
+        throw new UnsupportedOperationException(UNSUPPORTED_OPERATION);
+    }
+
+    /**
+      * Module require. See {@link jdk.internal.org.objectweb.asm.ModuleVisitor#visitRequire}.
+      *
+      * @param module the fully qualified name (using dots) of the dependence.
+      * @param access the access flag of the dependence among {@code ACC_TRANSITIVE}, {@code
+      *     ACC_STATIC_PHASE}, {@code ACC_SYNTHETIC} and {@code ACC_MANDATED}.
+      * @param version the module version at compile time, or {@literal null}.
+      */
+    public void visitRequire(final String module, final int access, final String version) {
+        throw new UnsupportedOperationException(UNSUPPORTED_OPERATION);
+    }
+
+    /**
+      * Module export. See {@link jdk.internal.org.objectweb.asm.ModuleVisitor#visitExport}.
+      *
+      * @param packaze the internal name of the exported package (see {@link Type#getInternalName()}).
+      * @param access the access flag of the exported package, valid values are among {@code
+      *     ACC_SYNTHETIC} and {@code ACC_MANDATED}.
+      * @param modules the fully qualified names (using dots) of the modules that can access the public
+      *     classes of the exported package, or {@literal null}.
+      */
+    public void visitExport(final String packaze, final int access, final String... modules) {
+        throw new UnsupportedOperationException(UNSUPPORTED_OPERATION);
+    }
+
+    /**
+      * Module open. See {@link jdk.internal.org.objectweb.asm.ModuleVisitor#visitOpen}.
+      *
+      * @param packaze the internal name of the opened package (see {@link Type#getInternalName()}).
+      * @param access the access flag of the opened package, valid values are among {@code
+      *     ACC_SYNTHETIC} and {@code ACC_MANDATED}.
+      * @param modules the fully qualified names (using dots) of the modules that can use deep
+      *     reflection to the classes of the open package, or {@literal null}.
+      */
+    public void visitOpen(final String packaze, final int access, final String... modules) {
+        throw new UnsupportedOperationException(UNSUPPORTED_OPERATION);
+    }
+
+    /**
+      * Module use. See {@link jdk.internal.org.objectweb.asm.ModuleVisitor#visitUse}.
+      *
+      * @param service the internal name of the service (see {@link Type#getInternalName()}).
+      */
+    public void visitUse(final String service) {
+        throw new UnsupportedOperationException(UNSUPPORTED_OPERATION);
+    }
+
+    /**
+      * Module provide. See {@link jdk.internal.org.objectweb.asm.ModuleVisitor#visitProvide}.
+      *
+      * @param service the internal name of the service (see {@link Type#getInternalName()}).
+      * @param providers the internal names of the implementations of the service (there is at least
+      *     one provider).
+      */
+    public void visitProvide(final String service, final String... providers) {
+        throw new UnsupportedOperationException(UNSUPPORTED_OPERATION);
+    }
+
+    /** Module end. See {@link jdk.internal.org.objectweb.asm.ModuleVisitor#visitEnd}. */
+    public void visitModuleEnd() {
+        throw new UnsupportedOperationException(UNSUPPORTED_OPERATION);
+    }
+
+    // -----------------------------------------------------------------------------------------------
+    // Annotations
+    // -----------------------------------------------------------------------------------------------
+
+    /**
+      * Annotation value. See {@link jdk.internal.org.objectweb.asm.AnnotationVisitor#visit}.
+      *
+      * @param name the value name.
+      * @param value the actual value, whose type must be {@link Byte}, {@link Boolean}, {@link
+      *     Character}, {@link Short}, {@link Integer} , {@link Long}, {@link Float}, {@link Double},
+      *     {@link String} or {@link Type} of {@link Type#OBJECT} or {@link Type#ARRAY} sort. This
+      *     value can also be an array of byte, boolean, short, char, int, long, float or double values
+      *     (this is equivalent to using {@link #visitArray} and visiting each array element in turn,
+      *     but is more convenient).
+      */
+    // DontCheck(OverloadMethodsDeclarationOrder): overloads are semantically different.
+    public abstract void visit(String name, Object value);
+
+    /**
+      * Annotation enum value. See {@link jdk.internal.org.objectweb.asm.AnnotationVisitor#visitEnum}.
+      *
+      * @param name the value name.
+      * @param descriptor the class descriptor of the enumeration class.
+      * @param value the actual enumeration value.
+      */
+    public abstract void visitEnum(String name, String descriptor, String value);
+
+    /**
+      * Nested annotation value. See {@link jdk.internal.org.objectweb.asm.AnnotationVisitor#visitAnnotation}.
+      *
+      * @param name the value name.
+      * @param descriptor the class descriptor of the nested annotation class.
+      * @return the printer.
+      */
+    public abstract Printer visitAnnotation(String name, String descriptor);
+
+    /**
+      * Annotation array value. See {@link jdk.internal.org.objectweb.asm.AnnotationVisitor#visitArray}.
+      *
+      * @param name the value name.
+      * @return the printer.
+      */
+    public abstract Printer visitArray(String name);
+
+    /** Annotation end. See {@link jdk.internal.org.objectweb.asm.AnnotationVisitor#visitEnd}. */
+    public abstract void visitAnnotationEnd();
+
+    // -----------------------------------------------------------------------------------------------
+    // Record components
+    // -----------------------------------------------------------------------------------------------
+
+    /**
+      * Visits an annotation of the record component. See {@link
+      * jdk.internal.org.objectweb.asm.RecordComponentVisitor#visitAnnotation}.
+      *
+      * @param descriptor the class descriptor of the annotation class.
+      * @param visible {@literal true} if the annotation is visible at runtime.
+      * @return a visitor to visit the annotation values, or {@literal null} if this visitor is not
+      *     interested in visiting this annotation.
+      */
+    public Printer visitRecordComponentAnnotation(final String descriptor, final boolean visible) {
+        throw new UnsupportedOperationException(UNSUPPORTED_OPERATION);
+    }
+
+    /**
+      * Visits an annotation on a type in the record component signature. See {@link
+      * jdk.internal.org.objectweb.asm.RecordComponentVisitor#visitTypeAnnotation}.
+      *
+      * @param typeRef a reference to the annotated type. The sort of this type reference must be
+      *     {@link TypeReference#CLASS_TYPE_PARAMETER}, {@link
+      *     TypeReference#CLASS_TYPE_PARAMETER_BOUND} or {@link TypeReference#CLASS_EXTENDS}. See
+      *     {@link TypeReference}.
+      * @param typePath the path to the annotated type argument, wildcard bound, array element type, or
+      *     static inner type within 'typeRef'. May be {@literal null} if the annotation targets
+      *     'typeRef' as a whole.
+      * @param descriptor the class descriptor of the annotation class.
+      * @param visible {@literal true} if the annotation is visible at runtime.
+      * @return a visitor to visit the annotation values, or {@literal null} if this visitor is not
+      *     interested in visiting this annotation.
+      */
+    public Printer visitRecordComponentTypeAnnotation(
+            final int typeRef, final TypePath typePath, final String descriptor, final boolean visible) {
+        throw new UnsupportedOperationException(UNSUPPORTED_OPERATION);
+    }
+
+    /**
+      * Visits a non standard attribute of the record component. See {@link
+      * jdk.internal.org.objectweb.asm.RecordComponentVisitor#visitAttribute}.
+      *
+      * @param attribute an attribute.
+      */
+    public void visitRecordComponentAttribute(final Attribute attribute) {
+        throw new UnsupportedOperationException(UNSUPPORTED_OPERATION);
+    }
+
+    /**
+      * Visits the end of the record component. See {@link
+      * jdk.internal.org.objectweb.asm.RecordComponentVisitor#visitEnd}. This method, which is the last one to be
+      * called, is used to inform the visitor that everything have been visited.
+      */
+    public void visitRecordComponentEnd() {
+        throw new UnsupportedOperationException(UNSUPPORTED_OPERATION);
+    }
+
+    // -----------------------------------------------------------------------------------------------
+    // Fields
+    // -----------------------------------------------------------------------------------------------
+
+    /**
+      * Field annotation. See {@link jdk.internal.org.objectweb.asm.FieldVisitor#visitAnnotation}.
+      *
+      * @param descriptor the class descriptor of the annotation class.
+      * @param visible {@literal true} if the annotation is visible at runtime.
+      * @return the printer.
+      */
+    public abstract Printer visitFieldAnnotation(String descriptor, boolean visible);
+
+    /**
+      * Field type annotation. See {@link jdk.internal.org.objectweb.asm.FieldVisitor#visitTypeAnnotation}.
+      *
+      * @param typeRef a reference to the annotated type. The sort of this type reference must be
+      *     {@link TypeReference#FIELD}. See {@link TypeReference}.
+      * @param typePath the path to the annotated type argument, wildcard bound, array element type, or
+      *     static inner type within 'typeRef'. May be {@literal null} if the annotation targets
+      *     'typeRef' as a whole.
+      * @param descriptor the class descriptor of the annotation class.
+      * @param visible {@literal true} if the annotation is visible at runtime.
+      * @return the printer.
+      */
+    public Printer visitFieldTypeAnnotation(
+            final int typeRef, final TypePath typePath, final String descriptor, final boolean visible) {
+        throw new UnsupportedOperationException(UNSUPPORTED_OPERATION);
+    }
+
+    /**
+      * Field attribute. See {@link jdk.internal.org.objectweb.asm.FieldVisitor#visitAttribute}.
+      *
+      * @param attribute an attribute.
+      */
+    public abstract void visitFieldAttribute(Attribute attribute);
+
+    /** Field end. See {@link jdk.internal.org.objectweb.asm.FieldVisitor#visitEnd}. */
+    public abstract void visitFieldEnd();
+
+    // -----------------------------------------------------------------------------------------------
+    // Methods
+    // -----------------------------------------------------------------------------------------------
+
+    /**
+      * Method parameter. See {@link jdk.internal.org.objectweb.asm.MethodVisitor#visitParameter(String, int)}.
+      *
+      * @param name parameter name or {@literal null} if none is provided.
+      * @param access the parameter's access flags, only {@code ACC_FINAL}, {@code ACC_SYNTHETIC}
+      *     or/and {@code ACC_MANDATED} are allowed (see {@link Opcodes}).
+      */
+    public void visitParameter(final String name, final int access) {
+        throw new UnsupportedOperationException(UNSUPPORTED_OPERATION);
+    }
+
+    /**
+      * Method default annotation. See {@link jdk.internal.org.objectweb.asm.MethodVisitor#visitAnnotationDefault}.
+      *
+      * @return the printer.
+      */
+    public abstract Printer visitAnnotationDefault();
+
+    /**
+      * Method annotation. See {@link jdk.internal.org.objectweb.asm.MethodVisitor#visitAnnotation}.
+      *
+      * @param descriptor the class descriptor of the annotation class.
+      * @param visible {@literal true} if the annotation is visible at runtime.
+      * @return the printer.
+      */
+    public abstract Printer visitMethodAnnotation(String descriptor, boolean visible);
+
+    /**
+      * Method type annotation. See {@link jdk.internal.org.objectweb.asm.MethodVisitor#visitTypeAnnotation}.
+      *
+      * @param typeRef a reference to the annotated type. The sort of this type reference must be
+      *     {@link TypeReference#METHOD_TYPE_PARAMETER}, {@link
+      *     TypeReference#METHOD_TYPE_PARAMETER_BOUND}, {@link TypeReference#METHOD_RETURN}, {@link
+      *     TypeReference#METHOD_RECEIVER}, {@link TypeReference#METHOD_FORMAL_PARAMETER} or {@link
+      *     TypeReference#THROWS}. See {@link TypeReference}.
+      * @param typePath the path to the annotated type argument, wildcard bound, array element type, or
+      *     static inner type within 'typeRef'. May be {@literal null} if the annotation targets
+      *     'typeRef' as a whole.
+      * @param descriptor the class descriptor of the annotation class.
+      * @param visible {@literal true} if the annotation is visible at runtime.
+      * @return the printer.
+      */
+    public Printer visitMethodTypeAnnotation(
+            final int typeRef, final TypePath typePath, final String descriptor, final boolean visible) {
+        throw new UnsupportedOperationException(UNSUPPORTED_OPERATION);
+    }
+
+    /**
+      * Number of method parameters that can have annotations. See {@link
+      * jdk.internal.org.objectweb.asm.MethodVisitor#visitAnnotableParameterCount}.
+      *
+      * @param parameterCount the number of method parameters than can have annotations. This number
+      *     must be less or equal than the number of parameter types in the method descriptor. It can
+      *     be strictly less when a method has synthetic parameters and when these parameters are
+      *     ignored when computing parameter indices for the purpose of parameter annotations (see
+      *     https://docs.oracle.com/javase/specs/jvms/se9/html/jvms-4.html#jvms-4.7.18).
+      * @param visible {@literal true} to define the number of method parameters that can have
+      *     annotations visible at runtime, {@literal false} to define the number of method parameters
+      *     that can have annotations invisible at runtime.
+      * @return the printer.
+      */
+    public Printer visitAnnotableParameterCount(final int parameterCount, final boolean visible) {
+        throw new UnsupportedOperationException(UNSUPPORTED_OPERATION);
+    }
+
+    /**
+      * Method parameter annotation. See {@link
+      * jdk.internal.org.objectweb.asm.MethodVisitor#visitParameterAnnotation}.
+      *
+      * @param parameter the parameter index. This index must be strictly smaller than the number of
+      *     parameters in the method descriptor, and strictly smaller than the parameter count
+      *     specified in {@link #visitAnnotableParameterCount}. Important note: <i>a parameter index i
+      *     is not required to correspond to the i'th parameter descriptor in the method
+      *     descriptor</i>, in particular in case of synthetic parameters (see
+      *     https://docs.oracle.com/javase/specs/jvms/se9/html/jvms-4.html#jvms-4.7.18).
+      * @param descriptor the class descriptor of the annotation class.
+      * @param visible {@literal true} if the annotation is visible at runtime.
+      * @return the printer.
+      */
+    public abstract Printer visitParameterAnnotation(
+            int parameter, String descriptor, boolean visible);
+
+    /**
+      * Method attribute. See {@link jdk.internal.org.objectweb.asm.MethodVisitor#visitAttribute}.
+      *
+      * @param attribute an attribute.
+      */
+    public abstract void visitMethodAttribute(Attribute attribute);
+
+    /** Method start. See {@link jdk.internal.org.objectweb.asm.MethodVisitor#visitCode}. */
+    public abstract void visitCode();
+
+    /**
+      * Method stack frame. See {@link jdk.internal.org.objectweb.asm.MethodVisitor#visitFrame}.
+      *
+      * @param type the type of this stack map frame. Must be {@link Opcodes#F_NEW} for expanded
+      *     frames, or {@link Opcodes#F_FULL}, {@link Opcodes#F_APPEND}, {@link Opcodes#F_CHOP}, {@link
+      *     Opcodes#F_SAME} or {@link Opcodes#F_APPEND}, {@link Opcodes#F_SAME1} for compressed frames.
+      * @param numLocal the number of local variables in the visited frame.
+      * @param local the local variable types in this frame. This array must not be modified. Primitive
+      *     types are represented by {@link Opcodes#TOP}, {@link Opcodes#INTEGER}, {@link
+      *     Opcodes#FLOAT}, {@link Opcodes#LONG}, {@link Opcodes#DOUBLE}, {@link Opcodes#NULL} or
+      *     {@link Opcodes#UNINITIALIZED_THIS} (long and double are represented by a single element).
+      *     Reference types are represented by String objects (representing internal names, see {@link
+      *     Type#getInternalName()}), and uninitialized types by Label objects (this label designates
+      *     the NEW instruction that created this uninitialized value).
+      * @param numStack the number of operand stack elements in the visited frame.
+      * @param stack the operand stack types in this frame. This array must not be modified. Its
+      *     content has the same format as the "local" array.
+      */
+    public abstract void visitFrame(
+            int type, int numLocal, Object[] local, int numStack, Object[] stack);
+
+    /**
+      * Method instruction. See {@link jdk.internal.org.objectweb.asm.MethodVisitor#visitInsn}
+      *
+      * @param opcode the opcode of the instruction to be visited. This opcode is either NOP,
+      *     ACONST_NULL, ICONST_M1, ICONST_0, ICONST_1, ICONST_2, ICONST_3, ICONST_4, ICONST_5,
+      *     LCONST_0, LCONST_1, FCONST_0, FCONST_1, FCONST_2, DCONST_0, DCONST_1, IALOAD, LALOAD,
+      *     FALOAD, DALOAD, AALOAD, BALOAD, CALOAD, SALOAD, IASTORE, LASTORE, FASTORE, DASTORE,
+      *     AASTORE, BASTORE, CASTORE, SASTORE, POP, POP2, DUP, DUP_X1, DUP_X2, DUP2, DUP2_X1, DUP2_X2,
+      *     SWAP, IADD, LADD, FADD, DADD, ISUB, LSUB, FSUB, DSUB, IMUL, LMUL, FMUL, DMUL, IDIV, LDIV,
+      *     FDIV, DDIV, IREM, LREM, FREM, DREM, INEG, LNEG, FNEG, DNEG, ISHL, LSHL, ISHR, LSHR, IUSHR,
+      *     LUSHR, IAND, LAND, IOR, LOR, IXOR, LXOR, I2L, I2F, I2D, L2I, L2F, L2D, F2I, F2L, F2D, D2I,
+      *     D2L, D2F, I2B, I2C, I2S, LCMP, FCMPL, FCMPG, DCMPL, DCMPG, IRETURN, LRETURN, FRETURN,
+      *     DRETURN, ARETURN, RETURN, ARRAYLENGTH, ATHROW, MONITORENTER, or MONITOREXIT.
+      */
+    public abstract void visitInsn(int opcode);
+
+    /**
+      * Method instruction. See {@link jdk.internal.org.objectweb.asm.MethodVisitor#visitIntInsn}.
+      *
+      * @param opcode the opcode of the instruction to be visited. This opcode is either BIPUSH, SIPUSH
+      *     or NEWARRAY.
+      * @param operand the operand of the instruction to be visited.<br>
+      *     When opcode is BIPUSH, operand value should be between Byte.MIN_VALUE and Byte.MAX_VALUE.
+      *     <br>
+      *     When opcode is SIPUSH, operand value should be between Short.MIN_VALUE and Short.MAX_VALUE.
+      *     <br>
+      *     When opcode is NEWARRAY, operand value should be one of {@link Opcodes#T_BOOLEAN}, {@link
+      *     Opcodes#T_CHAR}, {@link Opcodes#T_FLOAT}, {@link Opcodes#T_DOUBLE}, {@link Opcodes#T_BYTE},
+      *     {@link Opcodes#T_SHORT}, {@link Opcodes#T_INT} or {@link Opcodes#T_LONG}.
+      */
+    public abstract void visitIntInsn(int opcode, int operand);
+
+    /**
+      * Method instruction. See {@link jdk.internal.org.objectweb.asm.MethodVisitor#visitVarInsn}.
+      *
+      * @param opcode the opcode of the local variable instruction to be visited. This opcode is either
+      *     ILOAD, LLOAD, FLOAD, DLOAD, ALOAD, ISTORE, LSTORE, FSTORE, DSTORE, ASTORE or RET.
+      * @param varIndex the operand of the instruction to be visited. This operand is the index of a
+      *     local variable.
+      */
+    public abstract void visitVarInsn(int opcode, int varIndex);
+
+    /**
+      * Method instruction. See {@link jdk.internal.org.objectweb.asm.MethodVisitor#visitTypeInsn}.
+      *
+      * @param opcode the opcode of the type instruction to be visited. This opcode is either NEW,
+      *     ANEWARRAY, CHECKCAST or INSTANCEOF.
+      * @param type the operand of the instruction to be visited. This operand must be the internal
+      *     name of an object or array class (see {@link Type#getInternalName()}).
+      */
+    public abstract void visitTypeInsn(int opcode, String type);
+
+    /**
+      * Method instruction. See {@link jdk.internal.org.objectweb.asm.MethodVisitor#visitFieldInsn}.
+      *
+      * @param opcode the opcode of the type instruction to be visited. This opcode is either
+      *     GETSTATIC, PUTSTATIC, GETFIELD or PUTFIELD.
+      * @param owner the internal name of the field's owner class (see {@link Type#getInternalName()}).
+      * @param name the field's name.
+      * @param descriptor the field's descriptor (see {@link Type}).
+      */
+    public abstract void visitFieldInsn(int opcode, String owner, String name, String descriptor);
+
+    /**
+      * Method instruction. See {@link jdk.internal.org.objectweb.asm.MethodVisitor#visitMethodInsn}.
+      *
+      * @param opcode the opcode of the type instruction to be visited. This opcode is either
+      *     INVOKEVIRTUAL, INVOKESPECIAL, INVOKESTATIC or INVOKEINTERFACE.
+      * @param owner the internal name of the method's owner class (see {@link
+      *     Type#getInternalName()}).
+      * @param name the method's name.
+      * @param descriptor the method's descriptor (see {@link Type}).
+      * @deprecated use {@link #visitMethodInsn(int, String, String, String, boolean)} instead.
+      */
+    @Deprecated
+    public void visitMethodInsn(
+            final int opcode, final String owner, final String name, final String descriptor) {
+        // This method was abstract before ASM5, and was therefore always overridden (without any
+        // call to 'super'). Thus, at this point we necessarily have api >= ASM5, and we must then
+        // redirect the method call to the ASM5 visitMethodInsn() method.
+        visitMethodInsn(opcode, owner, name, descriptor, opcode == Opcodes.INVOKEINTERFACE);
+    }
+
+    /**
+      * Method instruction. See {@link jdk.internal.org.objectweb.asm.MethodVisitor#visitMethodInsn}.
+      *
+      * @param opcode the opcode of the type instruction to be visited. This opcode is either
+      *     INVOKEVIRTUAL, INVOKESPECIAL, INVOKESTATIC or INVOKEINTERFACE.
+      * @param owner the internal name of the method's owner class (see {@link
+      *     Type#getInternalName()}).
+      * @param name the method's name.
+      * @param descriptor the method's descriptor (see {@link Type}).
+      * @param isInterface if the method's owner class is an interface.
+      */
+    public void visitMethodInsn(
+            final int opcode,
+            final String owner,
+            final String name,
+            final String descriptor,
+            final boolean isInterface) {
+        throw new UnsupportedOperationException(UNSUPPORTED_OPERATION);
+    }
+
+    /**
+      * Method instruction. See {@link jdk.internal.org.objectweb.asm.MethodVisitor#visitInvokeDynamicInsn}.
+      *
+      * @param name the method's name.
+      * @param descriptor the method's descriptor (see {@link Type}).
+      * @param bootstrapMethodHandle the bootstrap method.
+      * @param bootstrapMethodArguments the bootstrap method constant arguments. Each argument must be
+      *     an {@link Integer}, {@link Float}, {@link Long}, {@link Double}, {@link String}, {@link
+      *     Type} or {@link Handle} value. This method is allowed to modify the content of the array so
+      *     a caller should expect that this array may change.
+      */
+    public abstract void visitInvokeDynamicInsn(
+            String name,
+            String descriptor,
+            Handle bootstrapMethodHandle,
+            Object... bootstrapMethodArguments);
+
+    /**
+      * Method jump instruction. See {@link jdk.internal.org.objectweb.asm.MethodVisitor#visitJumpInsn}.
+      *
+      * @param opcode the opcode of the type instruction to be visited. This opcode is either IFEQ,
+      *     IFNE, IFLT, IFGE, IFGT, IFLE, IF_ICMPEQ, IF_ICMPNE, IF_ICMPLT, IF_ICMPGE, IF_ICMPGT,
+      *     IF_ICMPLE, IF_ACMPEQ, IF_ACMPNE, GOTO, JSR, IFNULL or IFNONNULL.
+      * @param label the operand of the instruction to be visited. This operand is a label that
+      *     designates the instruction to which the jump instruction may jump.
+      */
+    public abstract void visitJumpInsn(int opcode, Label label);
+
+    /**
+      * Method label. See {@link jdk.internal.org.objectweb.asm.MethodVisitor#visitLabel}.
+      *
+      * @param label a {@link Label} object.
+      */
+    public abstract void visitLabel(Label label);
+
+    /**
+      * Method instruction. See {@link jdk.internal.org.objectweb.asm.MethodVisitor#visitLdcInsn}.
+      *
+      * @param value the constant to be loaded on the stack. This parameter must be a non null {@link
+      *     Integer}, a {@link Float}, a {@link Long}, a {@link Double}, a {@link String}, a {@link
+      *     Type} of OBJECT or ARRAY sort for {@code .class} constants, for classes whose version is
+      *     49, a {@link Type} of METHOD sort for MethodType, a {@link Handle} for MethodHandle
+      *     constants, for classes whose version is 51 or a {@link ConstantDynamic} for a constant
+      *     dynamic for classes whose version is 55.
+      */
+    public abstract void visitLdcInsn(Object value);
+
+    /**
+      * Method instruction. See {@link jdk.internal.org.objectweb.asm.MethodVisitor#visitIincInsn}.
+      *
+      * @param varIndex index of the local variable to be incremented.
+      * @param increment amount to increment the local variable by.
+      */
+    public abstract void visitIincInsn(int varIndex, int increment);
+
+    /**
+      * Method instruction. See {@link jdk.internal.org.objectweb.asm.MethodVisitor#visitTableSwitchInsn}.
+      *
+      * @param min the minimum key value.
+      * @param max the maximum key value.
+      * @param dflt beginning of the default handler block.
+      * @param labels beginnings of the handler blocks. {@code labels[i]} is the beginning of the
+      *     handler block for the {@code min + i} key.
+      */
+    public abstract void visitTableSwitchInsn(int min, int max, Label dflt, Label... labels);
+
+    /**
+      * Method instruction. See {@link jdk.internal.org.objectweb.asm.MethodVisitor#visitLookupSwitchInsn}.
+      *
+      * @param dflt beginning of the default handler block.
+      * @param keys the values of the keys.
+      * @param labels beginnings of the handler blocks. {@code labels[i]} is the beginning of the
+      *     handler block for the {@code keys[i]} key.
+      */
+    public abstract void visitLookupSwitchInsn(Label dflt, int[] keys, Label[] labels);
+
+    /**
+      * Method instruction. See {@link jdk.internal.org.objectweb.asm.MethodVisitor#visitMultiANewArrayInsn}.
+      *
+      * @param descriptor an array type descriptor (see {@link Type}).
+      * @param numDimensions the number of dimensions of the array to allocate.
+      */
+    public abstract void visitMultiANewArrayInsn(String descriptor, int numDimensions);
+
+    /**
+      * Instruction type annotation. See {@link jdk.internal.org.objectweb.asm.MethodVisitor#visitInsnAnnotation}.
+      *
+      * @param typeRef a reference to the annotated type. The sort of this type reference must be
+      *     {@link TypeReference#INSTANCEOF}, {@link TypeReference#NEW}, {@link
+      *     TypeReference#CONSTRUCTOR_REFERENCE}, {@link TypeReference#METHOD_REFERENCE}, {@link
+      *     TypeReference#CAST}, {@link TypeReference#CONSTRUCTOR_INVOCATION_TYPE_ARGUMENT}, {@link
+      *     TypeReference#METHOD_INVOCATION_TYPE_ARGUMENT}, {@link
+      *     TypeReference#CONSTRUCTOR_REFERENCE_TYPE_ARGUMENT}, or {@link
+      *     TypeReference#METHOD_REFERENCE_TYPE_ARGUMENT}. See {@link TypeReference}.
+      * @param typePath the path to the annotated type argument, wildcard bound, array element type, or
+      *     static inner type within 'typeRef'. May be {@literal null} if the annotation targets
+      *     'typeRef' as a whole.
+      * @param descriptor the class descriptor of the annotation class.
+      * @param visible {@literal true} if the annotation is visible at runtime.
+      * @return the printer.
+      */
+    public Printer visitInsnAnnotation(
+            final int typeRef, final TypePath typePath, final String descriptor, final boolean visible) {
+        throw new UnsupportedOperationException(UNSUPPORTED_OPERATION);
+    }
+
+    /**
+      * Method exception handler. See {@link jdk.internal.org.objectweb.asm.MethodVisitor#visitTryCatchBlock}.
+      *
+      * @param start the beginning of the exception handler's scope (inclusive).
+      * @param end the end of the exception handler's scope (exclusive).
+      * @param handler the beginning of the exception handler's code.
+      * @param type the internal name of the type of exceptions handled by the handler (see {@link
+      *     Type#getInternalName()}), or {@literal null} to catch any exceptions (for "finally"
+      *     blocks).
+      */
+    public abstract void visitTryCatchBlock(Label start, Label end, Label handler, String type);
+
+    /**
+      * Try catch block type annotation. See {@link
+      * jdk.internal.org.objectweb.asm.MethodVisitor#visitTryCatchAnnotation}.
+      *
+      * @param typeRef a reference to the annotated type. The sort of this type reference must be
+      *     {@link TypeReference#EXCEPTION_PARAMETER}. See {@link TypeReference}.
+      * @param typePath the path to the annotated type argument, wildcard bound, array element type, or
+      *     static inner type within 'typeRef'. May be {@literal null} if the annotation targets
+      *     'typeRef' as a whole.
+      * @param descriptor the class descriptor of the annotation class.
+      * @param visible {@literal true} if the annotation is visible at runtime.
+      * @return the printer.
+      */
+    public Printer visitTryCatchAnnotation(
+            final int typeRef, final TypePath typePath, final String descriptor, final boolean visible) {
+        throw new UnsupportedOperationException(UNSUPPORTED_OPERATION);
+    }
+
+    /**
+      * Method debug info. See {@link jdk.internal.org.objectweb.asm.MethodVisitor#visitLocalVariable}.
+      *
+      * @param name the name of a local variable.
+      * @param descriptor the type descriptor of this local variable.
+      * @param signature the type signature of this local variable. May be {@literal null} if the local
+      *     variable type does not use generic types.
+      * @param start the first instruction corresponding to the scope of this local variable
+      *     (inclusive).
+      * @param end the last instruction corresponding to the scope of this local variable (exclusive).
+      * @param index the local variable's index.
+      */
+    public abstract void visitLocalVariable(
+            String name, String descriptor, String signature, Label start, Label end, int index);
+
+    /**
+      * Local variable type annotation. See {@link
+      * jdk.internal.org.objectweb.asm.MethodVisitor#visitTryCatchAnnotation}.
+      *
+      * @param typeRef a reference to the annotated type. The sort of this type reference must be
+      *     {@link TypeReference#LOCAL_VARIABLE} or {@link TypeReference#RESOURCE_VARIABLE}. See {@link
+      *     TypeReference}.
+      * @param typePath the path to the annotated type argument, wildcard bound, array element type, or
+      *     static inner type within 'typeRef'. May be {@literal null} if the annotation targets
+      *     'typeRef' as a whole.
+      * @param start the fist instructions corresponding to the continuous ranges that make the scope
+      *     of this local variable (inclusive).
+      * @param end the last instructions corresponding to the continuous ranges that make the scope of
+      *     this local variable (exclusive). This array must have the same size as the 'start' array.
+      * @param index the local variable's index in each range. This array must have the same size as
+      *     the 'start' array.
+      * @param descriptor the class descriptor of the annotation class.
+      * @param visible {@literal true} if the annotation is visible at runtime.
+      * @return the printer.
+      */
+    public Printer visitLocalVariableAnnotation(
+            final int typeRef,
+            final TypePath typePath,
+            final Label[] start,
+            final Label[] end,
+            final int[] index,
+            final String descriptor,
+            final boolean visible) {
+        throw new UnsupportedOperationException(UNSUPPORTED_OPERATION);
+    }
+
+    /**
+      * Method debug info. See {@link jdk.internal.org.objectweb.asm.MethodVisitor#visitLineNumber}.
+      *
+      * @param line a line number. This number refers to the source file from which the class was
+      *     compiled.
+      * @param start the first instruction corresponding to this line number.
+      */
+    public abstract void visitLineNumber(int line, Label start);
+
+    /**
+      * Method max stack and max locals. See {@link jdk.internal.org.objectweb.asm.MethodVisitor#visitMaxs}.
+      *
+      * @param maxStack maximum stack size of the method.
+      * @param maxLocals maximum number of local variables for the method.
+      */
+    public abstract void visitMaxs(int maxStack, int maxLocals);
+
+    /** Method end. See {@link jdk.internal.org.objectweb.asm.MethodVisitor#visitEnd}. */
+    public abstract void visitMethodEnd();
+
+    // -----------------------------------------------------------------------------------------------
+    // Print and utility methods
+    // -----------------------------------------------------------------------------------------------
+
+    /**
+      * Returns the text constructed by this visitor.
+      *
+      * @return the text constructed by this visitor. See {@link #text}.
+      */
+    public List<Object> getText() {
+        return text;
+    }
+
+    /**
+      * Prints the text constructed by this visitor.
+      *
+      * @param printWriter the print writer to be used.
+      */
+    public void print(final PrintWriter printWriter) {
+        printList(printWriter, text);
+    }
+
+    /**
+      * Prints the given string tree.
+      *
+      * @param printWriter the writer to be used to print the tree.
+      * @param list a string tree, i.e., a string list that can contain other string lists, and so on
+      *     recursively.
+      */
+    static void printList(final PrintWriter printWriter, final List<?> list) {
+        for (Object o : list) {
+            if (o instanceof List) {
+                printList(printWriter, (List<?>) o);
+            } else {
+                printWriter.print(o.toString());
+            }
+        }
+    }
+
+    /**
+      * Appends a quoted string to the given string builder.
+      *
+      * @param stringBuilder the buffer where the string must be added.
+      * @param string the string to be added.
+      */
+    public static void appendString(final StringBuilder stringBuilder, final String string) {
+        stringBuilder.append('\"');
+        for (int i = 0; i < string.length(); ++i) {
+            char c = string.charAt(i);
+            if (c == '\n') {
+                stringBuilder.append("\\n");
+            } else if (c == '\r') {
+                stringBuilder.append("\\r");
+            } else if (c == '\\') {
+                stringBuilder.append("\\\\");
+            } else if (c == '"') {
+                stringBuilder.append("\\\"");
+            } else if (c < 0x20 || c > 0x7f) {
+                stringBuilder.append("\\u");
+                if (c < 0x10) {
+                    stringBuilder.append("000");
+                } else if (c < 0x100) {
+                    stringBuilder.append("00");
+                } else if (c < 0x1000) {
+                    stringBuilder.append('0');
+                }
+                stringBuilder.append(Integer.toString(c, 16));
+            } else {
+                stringBuilder.append(c);
+            }
+        }
+        stringBuilder.append('\"');
+    }
+
+    /**
+      * Prints the given class to the given output.
+      *
+      * <p>Command line arguments: [-nodebug] &lt;binary class name or class file name &gt;
+      *
+      * @param args the command line arguments.
+      * @param usage the help message to show when command line arguments are incorrect.
+      * @param printer the printer to convert the class into text.
+      * @param output where to print the result.
+      * @param logger where to log errors.
+      * @throws IOException if the class cannot be found, or if an IOException occurs.
+      */
+    static void main(
+            final String[] args,
+            final String usage,
+            final Printer printer,
+            final PrintWriter output,
+            final PrintWriter logger)
+            throws IOException {
+        if (args.length < 1
+                || args.length > 2
+                || ((args[0].equals("-debug") || args[0].equals("-nodebug")) && args.length != 2)) {
+            logger.println(usage);
+            return;
+        }
+
+        TraceClassVisitor traceClassVisitor = new TraceClassVisitor(null, printer, output);
+
+        String className;
+        int parsingOptions;
+        if (args[0].equals("-nodebug")) {
+            className = args[1];
+            parsingOptions = ClassReader.SKIP_DEBUG;
+        } else {
+            className = args[0];
+            parsingOptions = 0;
+        }
+
+        if (className.endsWith(".class")
+                || className.indexOf('\\') != -1
+                || className.indexOf('/') != -1) {
+            // Can't fix PMD warning for 1.5 compatibility.
+            try (InputStream inputStream = new FileInputStream(className)) { // NOPMD(AvoidFileStream)
+                new ClassReader(inputStream).accept(traceClassVisitor, parsingOptions);
+            }
+        } else {
+            new ClassReader(className).accept(traceClassVisitor, parsingOptions);
+        }
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/org/objectweb/asm/util/Textifier.class b/tests/test_data/std/jdk/internal/org/objectweb/asm/util/Textifier.class
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/org/objectweb/asm/util/Textifier.java b/tests/test_data/std/jdk/internal/org/objectweb/asm/util/Textifier.java
new file mode 100644
index 00000000..fe8a9c8b
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/org/objectweb/asm/util/Textifier.java
@@ -0,0 +1,1636 @@
+/*
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/*
+ * This file is available under and governed by the GNU General Public
+ * License version 2 only, as published by the Free Software Foundation.
+ * However, the following notice accompanied the original version of this
+ * file:
+ *
+ * ASM: a very small and fast Java bytecode manipulation framework
+ * Copyright (c) 2000-2011 INRIA, France Telecom
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the copyright holders nor the names of its
+ *    contributors may be used to endorse or promote products derived from
+ *    this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+package jdk.internal.org.objectweb.asm.util;
+
+import java.io.IOException;
+import java.io.PrintWriter;
+import java.util.Arrays;
+import java.util.Collections;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import jdk.internal.org.objectweb.asm.Attribute;
+import jdk.internal.org.objectweb.asm.Handle;
+import jdk.internal.org.objectweb.asm.Label;
+import jdk.internal.org.objectweb.asm.Opcodes;
+import jdk.internal.org.objectweb.asm.Type;
+import jdk.internal.org.objectweb.asm.TypePath;
+import jdk.internal.org.objectweb.asm.TypeReference;
+import jdk.internal.org.objectweb.asm.signature.SignatureReader;
+
+/**
+ * A {@link Printer} that prints a disassembled view of the classes it visits.
+ *
+ * @author Eric Bruneton
+ */
+public class Textifier extends Printer {
+
+    /** The help message shown when command line arguments are incorrect. */
+    private static final String USAGE =
+            "Prints a disassembled view of the given class.\n"
+                    + "Usage: Textifier [-nodebug] <fully qualified class name or class file name>";
+
+    /**
+      * The type of internal names (see {@link Type#getInternalName()}). See {@link #appendDescriptor}.
+      */
+    public static final int INTERNAL_NAME = 0;
+
+    /** The type of field descriptors. See {@link #appendDescriptor}. */
+    public static final int FIELD_DESCRIPTOR = 1;
+
+    /** The type of field signatures. See {@link #appendDescriptor}. */
+    public static final int FIELD_SIGNATURE = 2;
+
+    /** The type of method descriptors. See {@link #appendDescriptor}. */
+    public static final int METHOD_DESCRIPTOR = 3;
+
+    /** The type of method signatures. See {@link #appendDescriptor}. */
+    public static final int METHOD_SIGNATURE = 4;
+
+    /** The type of class signatures. See {@link #appendDescriptor}. */
+    public static final int CLASS_SIGNATURE = 5;
+
+    /** The type of method handle descriptors. See {@link #appendDescriptor}. */
+    public static final int HANDLE_DESCRIPTOR = 9;
+
+    private static final String CLASS_SUFFIX = ".class";
+    private static final String DEPRECATED = "// DEPRECATED\n";
+    private static final String RECORD = "// RECORD\n";
+    private static final String INVISIBLE = " // invisible\n";
+
+    private static final List<String> FRAME_TYPES =
+            Collections.unmodifiableList(Arrays.asList("T", "I", "F", "D", "J", "N", "U"));
+
+    /** The indentation of class members at depth level 1 (e.g. fields, methods). */
+    protected String tab = "  ";
+
+    /** The indentation of class elements at depth level 2 (e.g. bytecode instructions in methods). */
+    protected String tab2 = "    ";
+
+    /** The indentation of class elements at depth level 3 (e.g. switch cases in methods). */
+    protected String tab3 = "      ";
+
+    /** The indentation of labels. */
+    protected String ltab = "   ";
+
+    /** The names of the labels. */
+    protected Map<Label, String> labelNames;
+
+    /** The access flags of the visited class. */
+    private int access;
+
+    /** The number of annotation values visited so far. */
+    private int numAnnotationValues;
+
+    /**
+      * Constructs a new {@link Textifier}. <i>Subclasses must not use this constructor</i>. Instead,
+      * they must use the {@link #Textifier(int)} version.
+      *
+      * @throws IllegalStateException If a subclass calls this constructor.
+      */
+    public Textifier() {
+        this(/* latest api = */ Opcodes.ASM9);
+        if (getClass() != Textifier.class) {
+            throw new IllegalStateException();
+        }
+    }
+
+    /**
+      * Constructs a new {@link Textifier}.
+      *
+      * @param api the ASM API version implemented by this visitor. Must be one of the {@code
+      *     ASM}<i>x</i> values in {@link Opcodes}.
+      */
+    protected Textifier(final int api) {
+        super(api);
+    }
+
+    /**
+      * Prints a disassembled view of the given class to the standard output.
+      *
+      * <p>Usage: Textifier [-nodebug] &lt;binary class name or class file name &gt;
+      *
+      * @param args the command line arguments.
+      * @throws IOException if the class cannot be found, or if an IOException occurs.
+      */
+    public static void main(final String[] args) throws IOException {
+        main(args, new PrintWriter(System.out, true), new PrintWriter(System.err, true));
+    }
+
+    /**
+      * Prints a disassembled view of the given class to the given output.
+      *
+      * <p>Usage: Textifier [-nodebug] &lt;binary class name or class file name &gt;
+      *
+      * @param args the command line arguments.
+      * @param output where to print the result.
+      * @param logger where to log errors.
+      * @throws IOException if the class cannot be found, or if an IOException occurs.
+      */
+    static void main(final String[] args, final PrintWriter output, final PrintWriter logger)
+            throws IOException {
+        main(args, USAGE, new Textifier(), output, logger);
+    }
+
+    // -----------------------------------------------------------------------------------------------
+    // Classes
+    // -----------------------------------------------------------------------------------------------
+
+    @Override
+    public void visit(
+            final int version,
+            final int access,
+            final String name,
+            final String signature,
+            final String superName,
+            final String[] interfaces) {
+        if ((access & Opcodes.ACC_MODULE) != 0) {
+            // Modules are printed in visitModule.
+            return;
+        }
+        this.access = access;
+        int majorVersion = version & 0xFFFF;
+        int minorVersion = version >>> 16;
+        stringBuilder.setLength(0);
+        stringBuilder
+                .append("// class version ")
+                .append(majorVersion)
+                .append('.')
+                .append(minorVersion)
+                .append(" (")
+                .append(version)
+                .append(")\n");
+        if ((access & Opcodes.ACC_DEPRECATED) != 0) {
+            stringBuilder.append(DEPRECATED);
+        }
+        if ((access & Opcodes.ACC_RECORD) != 0) {
+            stringBuilder.append(RECORD);
+        }
+        appendRawAccess(access);
+
+        appendDescriptor(CLASS_SIGNATURE, signature);
+        if (signature != null) {
+            appendJavaDeclaration(name, signature);
+        }
+
+        appendAccess(access & ~(Opcodes.ACC_SUPER | Opcodes.ACC_MODULE));
+        if ((access & Opcodes.ACC_ANNOTATION) != 0) {
+            stringBuilder.append("@interface ");
+        } else if ((access & Opcodes.ACC_INTERFACE) != 0) {
+            stringBuilder.append("interface ");
+        } else if ((access & Opcodes.ACC_ENUM) == 0) {
+            stringBuilder.append("class ");
+        }
+        appendDescriptor(INTERNAL_NAME, name);
+
+        if (superName != null && !"java/lang/Object".equals(superName)) {
+            stringBuilder.append(" extends ");
+            appendDescriptor(INTERNAL_NAME, superName);
+        }
+        if (interfaces != null && interfaces.length > 0) {
+            stringBuilder.append(" implements ");
+            for (int i = 0; i < interfaces.length; ++i) {
+                appendDescriptor(INTERNAL_NAME, interfaces[i]);
+                if (i != interfaces.length - 1) {
+                    stringBuilder.append(' ');
+                }
+            }
+        }
+        stringBuilder.append(" {\n\n");
+
+        text.add(stringBuilder.toString());
+    }
+
+    @Override
+    public void visitSource(final String file, final String debug) {
+        stringBuilder.setLength(0);
+        if (file != null) {
+            stringBuilder.append(tab).append("// compiled from: ").append(file).append('\n');
+        }
+        if (debug != null) {
+            stringBuilder.append(tab).append("// debug info: ").append(debug).append('\n');
+        }
+        if (stringBuilder.length() > 0) {
+            text.add(stringBuilder.toString());
+        }
+    }
+
+    @Override
+    public Printer visitModule(final String name, final int access, final String version) {
+        stringBuilder.setLength(0);
+        if ((access & Opcodes.ACC_OPEN) != 0) {
+            stringBuilder.append("open ");
+        }
+        stringBuilder
+                .append("module ")
+                .append(name)
+                .append(" { ")
+                .append(version == null ? "" : "// " + version)
+                .append("\n\n");
+        text.add(stringBuilder.toString());
+        return addNewTextifier(null);
+    }
+
+    @Override
+    public void visitNestHost(final String nestHost) {
+        stringBuilder.setLength(0);
+        stringBuilder.append(tab).append("NESTHOST ");
+        appendDescriptor(INTERNAL_NAME, nestHost);
+        stringBuilder.append('\n');
+        text.add(stringBuilder.toString());
+    }
+
+    @Override
+    public void visitOuterClass(final String owner, final String name, final String descriptor) {
+        stringBuilder.setLength(0);
+        stringBuilder.append(tab).append("OUTERCLASS ");
+        appendDescriptor(INTERNAL_NAME, owner);
+        stringBuilder.append(' ');
+        if (name != null) {
+            stringBuilder.append(name).append(' ');
+        }
+        appendDescriptor(METHOD_DESCRIPTOR, descriptor);
+        stringBuilder.append('\n');
+        text.add(stringBuilder.toString());
+    }
+
+    @Override
+    public Textifier visitClassAnnotation(final String descriptor, final boolean visible) {
+        text.add("\n");
+        return visitAnnotation(descriptor, visible);
+    }
+
+    @Override
+    public Printer visitClassTypeAnnotation(
+            final int typeRef, final TypePath typePath, final String descriptor, final boolean visible) {
+        text.add("\n");
+        return visitTypeAnnotation(typeRef, typePath, descriptor, visible);
+    }
+
+    @Override
+    public void visitClassAttribute(final Attribute attribute) {
+        text.add("\n");
+        visitAttribute(attribute);
+    }
+
+    @Override
+    public void visitNestMember(final String nestMember) {
+        stringBuilder.setLength(0);
+        stringBuilder.append(tab).append("NESTMEMBER ");
+        appendDescriptor(INTERNAL_NAME, nestMember);
+        stringBuilder.append('\n');
+        text.add(stringBuilder.toString());
+    }
+
+    @Override
+    public void visitPermittedSubclass(final String permittedSubclass) {
+        stringBuilder.setLength(0);
+        stringBuilder.append(tab).append("PERMITTEDSUBCLASS ");
+        appendDescriptor(INTERNAL_NAME, permittedSubclass);
+        stringBuilder.append('\n');
+        text.add(stringBuilder.toString());
+    }
+
+    @Override
+    public void visitInnerClass(
+            final String name, final String outerName, final String innerName, final int access) {
+        stringBuilder.setLength(0);
+        stringBuilder.append(tab);
+        appendRawAccess(access & ~Opcodes.ACC_SUPER);
+        stringBuilder.append(tab);
+        appendAccess(access);
+        stringBuilder.append("INNERCLASS ");
+        appendDescriptor(INTERNAL_NAME, name);
+        stringBuilder.append(' ');
+        appendDescriptor(INTERNAL_NAME, outerName);
+        stringBuilder.append(' ');
+        appendDescriptor(INTERNAL_NAME, innerName);
+        stringBuilder.append('\n');
+        text.add(stringBuilder.toString());
+    }
+
+    @Override
+    public Printer visitRecordComponent(
+            final String name, final String descriptor, final String signature) {
+        stringBuilder.setLength(0);
+        stringBuilder.append(tab).append("RECORDCOMPONENT ");
+        if (signature != null) {
+            stringBuilder.append(tab);
+            appendDescriptor(FIELD_SIGNATURE, signature);
+            stringBuilder.append(tab);
+            appendJavaDeclaration(name, signature);
+        }
+
+        stringBuilder.append(tab);
+
+        appendDescriptor(FIELD_DESCRIPTOR, descriptor);
+        stringBuilder.append(' ').append(name);
+
+        stringBuilder.append('\n');
+        text.add(stringBuilder.toString());
+        return addNewTextifier(null);
+    }
+
+    @Override
+    public Textifier visitField(
+            final int access,
+            final String name,
+            final String descriptor,
+            final String signature,
+            final Object value) {
+        stringBuilder.setLength(0);
+        stringBuilder.append('\n');
+        if ((access & Opcodes.ACC_DEPRECATED) != 0) {
+            stringBuilder.append(tab).append(DEPRECATED);
+        }
+        stringBuilder.append(tab);
+        appendRawAccess(access);
+        if (signature != null) {
+            stringBuilder.append(tab);
+            appendDescriptor(FIELD_SIGNATURE, signature);
+            stringBuilder.append(tab);
+            appendJavaDeclaration(name, signature);
+        }
+
+        stringBuilder.append(tab);
+        appendAccess(access);
+
+        appendDescriptor(FIELD_DESCRIPTOR, descriptor);
+        stringBuilder.append(' ').append(name);
+        if (value != null) {
+            stringBuilder.append(" = ");
+            if (value instanceof String) {
+                stringBuilder.append('\"').append(value).append('\"');
+            } else {
+                stringBuilder.append(value);
+            }
+        }
+
+        stringBuilder.append('\n');
+        text.add(stringBuilder.toString());
+        return addNewTextifier(null);
+    }
+
+    @Override
+    public Textifier visitMethod(
+            final int access,
+            final String name,
+            final String descriptor,
+            final String signature,
+            final String[] exceptions) {
+        stringBuilder.setLength(0);
+        stringBuilder.append('\n');
+        if ((access & Opcodes.ACC_DEPRECATED) != 0) {
+            stringBuilder.append(tab).append(DEPRECATED);
+        }
+        stringBuilder.append(tab);
+        appendRawAccess(access);
+
+        if (signature != null) {
+            stringBuilder.append(tab);
+            appendDescriptor(METHOD_SIGNATURE, signature);
+            stringBuilder.append(tab);
+            appendJavaDeclaration(name, signature);
+        }
+
+        stringBuilder.append(tab);
+        appendAccess(access & ~(Opcodes.ACC_VOLATILE | Opcodes.ACC_TRANSIENT));
+        if ((access & Opcodes.ACC_NATIVE) != 0) {
+            stringBuilder.append("native ");
+        }
+        if ((access & Opcodes.ACC_VARARGS) != 0) {
+            stringBuilder.append("varargs ");
+        }
+        if ((access & Opcodes.ACC_BRIDGE) != 0) {
+            stringBuilder.append("bridge ");
+        }
+        if ((this.access & Opcodes.ACC_INTERFACE) != 0
+                && (access & (Opcodes.ACC_ABSTRACT | Opcodes.ACC_STATIC)) == 0) {
+            stringBuilder.append("default ");
+        }
+
+        stringBuilder.append(name);
+        appendDescriptor(METHOD_DESCRIPTOR, descriptor);
+        if (exceptions != null && exceptions.length > 0) {
+            stringBuilder.append(" throws ");
+            for (String exception : exceptions) {
+                appendDescriptor(INTERNAL_NAME, exception);
+                stringBuilder.append(' ');
+            }
+        }
+
+        stringBuilder.append('\n');
+        text.add(stringBuilder.toString());
+        return addNewTextifier(null);
+    }
+
+    @Override
+    public void visitClassEnd() {
+        text.add("}\n");
+    }
+
+    // -----------------------------------------------------------------------------------------------
+    // Modules
+    // -----------------------------------------------------------------------------------------------
+
+    @Override
+    public void visitMainClass(final String mainClass) {
+        stringBuilder.setLength(0);
+        stringBuilder.append("  // main class ").append(mainClass).append('\n');
+        text.add(stringBuilder.toString());
+    }
+
+    @Override
+    public void visitPackage(final String packaze) {
+        stringBuilder.setLength(0);
+        stringBuilder.append("  // package ").append(packaze).append('\n');
+        text.add(stringBuilder.toString());
+    }
+
+    @Override
+    public void visitRequire(final String require, final int access, final String version) {
+        stringBuilder.setLength(0);
+        stringBuilder.append(tab).append("requires ");
+        if ((access & Opcodes.ACC_TRANSITIVE) != 0) {
+            stringBuilder.append("transitive ");
+        }
+        if ((access & Opcodes.ACC_STATIC_PHASE) != 0) {
+            stringBuilder.append("static ");
+        }
+        stringBuilder.append(require).append(';');
+        appendRawAccess(access);
+        if (version != null) {
+            stringBuilder.append("  // version ").append(version).append('\n');
+        }
+        text.add(stringBuilder.toString());
+    }
+
+    @Override
+    public void visitExport(final String packaze, final int access, final String... modules) {
+        visitExportOrOpen("exports ", packaze, access, modules);
+    }
+
+    @Override
+    public void visitOpen(final String packaze, final int access, final String... modules) {
+        visitExportOrOpen("opens ", packaze, access, modules);
+    }
+
+    private void visitExportOrOpen(
+            final String method, final String packaze, final int access, final String... modules) {
+        stringBuilder.setLength(0);
+        stringBuilder.append(tab).append(method);
+        stringBuilder.append(packaze);
+        if (modules != null && modules.length > 0) {
+            stringBuilder.append(" to");
+        } else {
+            stringBuilder.append(';');
+        }
+        appendRawAccess(access);
+        if (modules != null && modules.length > 0) {
+            for (int i = 0; i < modules.length; ++i) {
+                stringBuilder.append(tab2).append(modules[i]);
+                stringBuilder.append(i != modules.length - 1 ? ",\n" : ";\n");
+            }
+        }
+        text.add(stringBuilder.toString());
+    }
+
+    @Override
+    public void visitUse(final String use) {
+        stringBuilder.setLength(0);
+        stringBuilder.append(tab).append("uses ");
+        appendDescriptor(INTERNAL_NAME, use);
+        stringBuilder.append(";\n");
+        text.add(stringBuilder.toString());
+    }
+
+    @Override
+    public void visitProvide(final String provide, final String... providers) {
+        stringBuilder.setLength(0);
+        stringBuilder.append(tab).append("provides ");
+        appendDescriptor(INTERNAL_NAME, provide);
+        stringBuilder.append(" with\n");
+        for (int i = 0; i < providers.length; ++i) {
+            stringBuilder.append(tab2);
+            appendDescriptor(INTERNAL_NAME, providers[i]);
+            stringBuilder.append(i != providers.length - 1 ? ",\n" : ";\n");
+        }
+        text.add(stringBuilder.toString());
+    }
+
+    @Override
+    public void visitModuleEnd() {
+        // Nothing to do.
+    }
+
+    // -----------------------------------------------------------------------------------------------
+    // Annotations
+    // -----------------------------------------------------------------------------------------------
+
+    // DontCheck(OverloadMethodsDeclarationOrder): overloads are semantically different.
+    @Override
+    public void visit(final String name, final Object value) {
+        visitAnnotationValue(name);
+        if (value instanceof String) {
+            visitString((String) value);
+        } else if (value instanceof Type) {
+            visitType((Type) value);
+        } else if (value instanceof Byte) {
+            visitByte(((Byte) value).byteValue());
+        } else if (value instanceof Boolean) {
+            visitBoolean(((Boolean) value).booleanValue());
+        } else if (value instanceof Short) {
+            visitShort(((Short) value).shortValue());
+        } else if (value instanceof Character) {
+            visitChar(((Character) value).charValue());
+        } else if (value instanceof Integer) {
+            visitInt(((Integer) value).intValue());
+        } else if (value instanceof Float) {
+            visitFloat(((Float) value).floatValue());
+        } else if (value instanceof Long) {
+            visitLong(((Long) value).longValue());
+        } else if (value instanceof Double) {
+            visitDouble(((Double) value).doubleValue());
+        } else if (value.getClass().isArray()) {
+            stringBuilder.append('{');
+            if (value instanceof byte[]) {
+                byte[] byteArray = (byte[]) value;
+                for (int i = 0; i < byteArray.length; i++) {
+                    maybeAppendComma(i);
+                    visitByte(byteArray[i]);
+                }
+            } else if (value instanceof boolean[]) {
+                boolean[] booleanArray = (boolean[]) value;
+                for (int i = 0; i < booleanArray.length; i++) {
+                    maybeAppendComma(i);
+                    visitBoolean(booleanArray[i]);
+                }
+            } else if (value instanceof short[]) {
+                short[] shortArray = (short[]) value;
+                for (int i = 0; i < shortArray.length; i++) {
+                    maybeAppendComma(i);
+                    visitShort(shortArray[i]);
+                }
+            } else if (value instanceof char[]) {
+                char[] charArray = (char[]) value;
+                for (int i = 0; i < charArray.length; i++) {
+                    maybeAppendComma(i);
+                    visitChar(charArray[i]);
+                }
+            } else if (value instanceof int[]) {
+                int[] intArray = (int[]) value;
+                for (int i = 0; i < intArray.length; i++) {
+                    maybeAppendComma(i);
+                    visitInt(intArray[i]);
+                }
+            } else if (value instanceof long[]) {
+                long[] longArray = (long[]) value;
+                for (int i = 0; i < longArray.length; i++) {
+                    maybeAppendComma(i);
+                    visitLong(longArray[i]);
+                }
+            } else if (value instanceof float[]) {
+                float[] floatArray = (float[]) value;
+                for (int i = 0; i < floatArray.length; i++) {
+                    maybeAppendComma(i);
+                    visitFloat(floatArray[i]);
+                }
+            } else if (value instanceof double[]) {
+                double[] doubleArray = (double[]) value;
+                for (int i = 0; i < doubleArray.length; i++) {
+                    maybeAppendComma(i);
+                    visitDouble(doubleArray[i]);
+                }
+            }
+            stringBuilder.append('}');
+        }
+        text.add(stringBuilder.toString());
+    }
+
+    private void visitInt(final int value) {
+        stringBuilder.append(value);
+    }
+
+    private void visitLong(final long value) {
+        stringBuilder.append(value).append('L');
+    }
+
+    private void visitFloat(final float value) {
+        stringBuilder.append(value).append('F');
+    }
+
+    private void visitDouble(final double value) {
+        stringBuilder.append(value).append('D');
+    }
+
+    private void visitChar(final char value) {
+        stringBuilder.append("(char)").append((int) value);
+    }
+
+    private void visitShort(final short value) {
+        stringBuilder.append("(short)").append(value);
+    }
+
+    private void visitByte(final byte value) {
+        stringBuilder.append("(byte)").append(value);
+    }
+
+    private void visitBoolean(final boolean value) {
+        stringBuilder.append(value);
+    }
+
+    private void visitString(final String value) {
+        appendString(stringBuilder, value);
+    }
+
+    private void visitType(final Type value) {
+        stringBuilder.append(value.getClassName()).append(CLASS_SUFFIX);
+    }
+
+    @Override
+    public void visitEnum(final String name, final String descriptor, final String value) {
+        visitAnnotationValue(name);
+        appendDescriptor(FIELD_DESCRIPTOR, descriptor);
+        stringBuilder.append('.').append(value);
+        text.add(stringBuilder.toString());
+    }
+
+    @Override
+    public Textifier visitAnnotation(final String name, final String descriptor) {
+        visitAnnotationValue(name);
+        stringBuilder.append('@');
+        appendDescriptor(FIELD_DESCRIPTOR, descriptor);
+        stringBuilder.append('(');
+        text.add(stringBuilder.toString());
+        return addNewTextifier(")");
+    }
+
+    @Override
+    public Textifier visitArray(final String name) {
+        visitAnnotationValue(name);
+        stringBuilder.append('{');
+        text.add(stringBuilder.toString());
+        return addNewTextifier("}");
+    }
+
+    @Override
+    public void visitAnnotationEnd() {
+        // Nothing to do.
+    }
+
+    private void visitAnnotationValue(final String name) {
+        stringBuilder.setLength(0);
+        maybeAppendComma(numAnnotationValues++);
+        if (name != null) {
+            stringBuilder.append(name).append('=');
+        }
+    }
+
+    // -----------------------------------------------------------------------------------------------
+    // Record components
+    // -----------------------------------------------------------------------------------------------
+
+    @Override
+    public Textifier visitRecordComponentAnnotation(final String descriptor, final boolean visible) {
+        return visitAnnotation(descriptor, visible);
+    }
+
+    @Override
+    public Printer visitRecordComponentTypeAnnotation(
+            final int typeRef, final TypePath typePath, final String descriptor, final boolean visible) {
+        return visitTypeAnnotation(typeRef, typePath, descriptor, visible);
+    }
+
+    @Override
+    public void visitRecordComponentAttribute(final Attribute attribute) {
+        visitAttribute(attribute);
+    }
+
+    @Override
+    public void visitRecordComponentEnd() {
+        // Nothing to do.
+    }
+
+    // -----------------------------------------------------------------------------------------------
+    // Fields
+    // -----------------------------------------------------------------------------------------------
+
+    @Override
+    public Textifier visitFieldAnnotation(final String descriptor, final boolean visible) {
+        return visitAnnotation(descriptor, visible);
+    }
+
+    @Override
+    public Printer visitFieldTypeAnnotation(
+            final int typeRef, final TypePath typePath, final String descriptor, final boolean visible) {
+        return visitTypeAnnotation(typeRef, typePath, descriptor, visible);
+    }
+
+    @Override
+    public void visitFieldAttribute(final Attribute attribute) {
+        visitAttribute(attribute);
+    }
+
+    @Override
+    public void visitFieldEnd() {
+        // Nothing to do.
+    }
+
+    // -----------------------------------------------------------------------------------------------
+    // Methods
+    // -----------------------------------------------------------------------------------------------
+
+    @Override
+    public void visitParameter(final String name, final int access) {
+        stringBuilder.setLength(0);
+        stringBuilder.append(tab2).append("// parameter ");
+        appendAccess(access);
+        stringBuilder.append(' ').append((name == null) ? "<no name>" : name).append('\n');
+        text.add(stringBuilder.toString());
+    }
+
+    @Override
+    public Textifier visitAnnotationDefault() {
+        text.add(tab2 + "default=");
+        return addNewTextifier("\n");
+    }
+
+    @Override
+    public Textifier visitMethodAnnotation(final String descriptor, final boolean visible) {
+        return visitAnnotation(descriptor, visible);
+    }
+
+    @Override
+    public Printer visitMethodTypeAnnotation(
+            final int typeRef, final TypePath typePath, final String descriptor, final boolean visible) {
+        return visitTypeAnnotation(typeRef, typePath, descriptor, visible);
+    }
+
+    @Override
+    public Textifier visitAnnotableParameterCount(final int parameterCount, final boolean visible) {
+        stringBuilder.setLength(0);
+        stringBuilder.append(tab2).append("// annotable parameter count: ");
+        stringBuilder.append(parameterCount);
+        stringBuilder.append(visible ? " (visible)\n" : " (invisible)\n");
+        text.add(stringBuilder.toString());
+        return this;
+    }
+
+    @Override
+    public Textifier visitParameterAnnotation(
+            final int parameter, final String descriptor, final boolean visible) {
+        stringBuilder.setLength(0);
+        stringBuilder.append(tab2).append('@');
+        appendDescriptor(FIELD_DESCRIPTOR, descriptor);
+        stringBuilder.append('(');
+        text.add(stringBuilder.toString());
+
+        stringBuilder.setLength(0);
+        stringBuilder
+                .append(visible ? ") // parameter " : ") // invisible, parameter ")
+                .append(parameter)
+                .append('\n');
+        return addNewTextifier(stringBuilder.toString());
+    }
+
+    @Override
+    public void visitMethodAttribute(final Attribute attribute) {
+        visitAttribute(attribute);
+    }
+
+    @Override
+    public void visitCode() {
+        // Nothing to do.
+    }
+
+    @Override
+    public void visitFrame(
+            final int type,
+            final int numLocal,
+            final Object[] local,
+            final int numStack,
+            final Object[] stack) {
+        stringBuilder.setLength(0);
+        stringBuilder.append(ltab);
+        stringBuilder.append("FRAME ");
+        switch (type) {
+            case Opcodes.F_NEW:
+            case Opcodes.F_FULL:
+                stringBuilder.append("FULL [");
+                appendFrameTypes(numLocal, local);
+                stringBuilder.append("] [");
+                appendFrameTypes(numStack, stack);
+                stringBuilder.append(']');
+                break;
+            case Opcodes.F_APPEND:
+                stringBuilder.append("APPEND [");
+                appendFrameTypes(numLocal, local);
+                stringBuilder.append(']');
+                break;
+            case Opcodes.F_CHOP:
+                stringBuilder.append("CHOP ").append(numLocal);
+                break;
+            case Opcodes.F_SAME:
+                stringBuilder.append("SAME");
+                break;
+            case Opcodes.F_SAME1:
+                stringBuilder.append("SAME1 ");
+                appendFrameTypes(1, stack);
+                break;
+            default:
+                throw new IllegalArgumentException();
+        }
+        stringBuilder.append('\n');
+        text.add(stringBuilder.toString());
+    }
+
+    @Override
+    public void visitInsn(final int opcode) {
+        stringBuilder.setLength(0);
+        stringBuilder.append(tab2).append(OPCODES[opcode]).append('\n');
+        text.add(stringBuilder.toString());
+    }
+
+    @Override
+    public void visitIntInsn(final int opcode, final int operand) {
+        stringBuilder.setLength(0);
+        stringBuilder
+                .append(tab2)
+                .append(OPCODES[opcode])
+                .append(' ')
+                .append(opcode == Opcodes.NEWARRAY ? TYPES[operand] : Integer.toString(operand))
+                .append('\n');
+        text.add(stringBuilder.toString());
+    }
+
+    @Override
+    public void visitVarInsn(final int opcode, final int varIndex) {
+        stringBuilder.setLength(0);
+        stringBuilder.append(tab2).append(OPCODES[opcode]).append(' ').append(varIndex).append('\n');
+        text.add(stringBuilder.toString());
+    }
+
+    @Override
+    public void visitTypeInsn(final int opcode, final String type) {
+        stringBuilder.setLength(0);
+        stringBuilder.append(tab2).append(OPCODES[opcode]).append(' ');
+        appendDescriptor(INTERNAL_NAME, type);
+        stringBuilder.append('\n');
+        text.add(stringBuilder.toString());
+    }
+
+    @Override
+    public void visitFieldInsn(
+            final int opcode, final String owner, final String name, final String descriptor) {
+        stringBuilder.setLength(0);
+        stringBuilder.append(tab2).append(OPCODES[opcode]).append(' ');
+        appendDescriptor(INTERNAL_NAME, owner);
+        stringBuilder.append('.').append(name).append(" : ");
+        appendDescriptor(FIELD_DESCRIPTOR, descriptor);
+        stringBuilder.append('\n');
+        text.add(stringBuilder.toString());
+    }
+
+    @Override
+    public void visitMethodInsn(
+            final int opcode,
+            final String owner,
+            final String name,
+            final String descriptor,
+            final boolean isInterface) {
+        stringBuilder.setLength(0);
+        stringBuilder.append(tab2).append(OPCODES[opcode]).append(' ');
+        appendDescriptor(INTERNAL_NAME, owner);
+        stringBuilder.append('.').append(name).append(' ');
+        appendDescriptor(METHOD_DESCRIPTOR, descriptor);
+        if (isInterface) {
+            stringBuilder.append(" (itf)");
+        }
+        stringBuilder.append('\n');
+        text.add(stringBuilder.toString());
+    }
+
+    @Override
+    public void visitInvokeDynamicInsn(
+            final String name,
+            final String descriptor,
+            final Handle bootstrapMethodHandle,
+            final Object... bootstrapMethodArguments) {
+        stringBuilder.setLength(0);
+        stringBuilder.append(tab2).append("INVOKEDYNAMIC").append(' ');
+        stringBuilder.append(name);
+        appendDescriptor(METHOD_DESCRIPTOR, descriptor);
+        stringBuilder.append(" [");
+        stringBuilder.append('\n');
+        stringBuilder.append(tab3);
+        appendHandle(bootstrapMethodHandle);
+        stringBuilder.append('\n');
+        stringBuilder.append(tab3).append("// arguments:");
+        if (bootstrapMethodArguments.length == 0) {
+            stringBuilder.append(" none");
+        } else {
+            stringBuilder.append('\n');
+            for (Object value : bootstrapMethodArguments) {
+                stringBuilder.append(tab3);
+                if (value instanceof String) {
+                    Printer.appendString(stringBuilder, (String) value);
+                } else if (value instanceof Type) {
+                    Type type = (Type) value;
+                    if (type.getSort() == Type.METHOD) {
+                        appendDescriptor(METHOD_DESCRIPTOR, type.getDescriptor());
+                    } else {
+                        visitType(type);
+                    }
+                } else if (value instanceof Handle) {
+                    appendHandle((Handle) value);
+                } else {
+                    stringBuilder.append(value);
+                }
+                stringBuilder.append(", \n");
+            }
+            stringBuilder.setLength(stringBuilder.length() - 3);
+        }
+        stringBuilder.append('\n');
+        stringBuilder.append(tab2).append("]\n");
+        text.add(stringBuilder.toString());
+    }
+
+    @Override
+    public void visitJumpInsn(final int opcode, final Label label) {
+        stringBuilder.setLength(0);
+        stringBuilder.append(tab2).append(OPCODES[opcode]).append(' ');
+        appendLabel(label);
+        stringBuilder.append('\n');
+        text.add(stringBuilder.toString());
+    }
+
+    @Override
+    public void visitLabel(final Label label) {
+        stringBuilder.setLength(0);
+        stringBuilder.append(ltab);
+        appendLabel(label);
+        stringBuilder.append('\n');
+        text.add(stringBuilder.toString());
+    }
+
+    @Override
+    public void visitLdcInsn(final Object value) {
+        stringBuilder.setLength(0);
+        stringBuilder.append(tab2).append("LDC ");
+        if (value instanceof String) {
+            Printer.appendString(stringBuilder, (String) value);
+        } else if (value instanceof Type) {
+            stringBuilder.append(((Type) value).getDescriptor()).append(CLASS_SUFFIX);
+        } else {
+            stringBuilder.append(value);
+        }
+        stringBuilder.append('\n');
+        text.add(stringBuilder.toString());
+    }
+
+    @Override
+    public void visitIincInsn(final int varIndex, final int increment) {
+        stringBuilder.setLength(0);
+        stringBuilder
+                .append(tab2)
+                .append("IINC ")
+                .append(varIndex)
+                .append(' ')
+                .append(increment)
+                .append('\n');
+        text.add(stringBuilder.toString());
+    }
+
+    @Override
+    public void visitTableSwitchInsn(
+            final int min, final int max, final Label dflt, final Label... labels) {
+        stringBuilder.setLength(0);
+        stringBuilder.append(tab2).append("TABLESWITCH\n");
+        for (int i = 0; i < labels.length; ++i) {
+            stringBuilder.append(tab3).append(min + i).append(": ");
+            appendLabel(labels[i]);
+            stringBuilder.append('\n');
+        }
+        stringBuilder.append(tab3).append("default: ");
+        appendLabel(dflt);
+        stringBuilder.append('\n');
+        text.add(stringBuilder.toString());
+    }
+
+    @Override
+    public void visitLookupSwitchInsn(final Label dflt, final int[] keys, final Label[] labels) {
+        stringBuilder.setLength(0);
+        stringBuilder.append(tab2).append("LOOKUPSWITCH\n");
+        for (int i = 0; i < labels.length; ++i) {
+            stringBuilder.append(tab3).append(keys[i]).append(": ");
+            appendLabel(labels[i]);
+            stringBuilder.append('\n');
+        }
+        stringBuilder.append(tab3).append("default: ");
+        appendLabel(dflt);
+        stringBuilder.append('\n');
+        text.add(stringBuilder.toString());
+    }
+
+    @Override
+    public void visitMultiANewArrayInsn(final String descriptor, final int numDimensions) {
+        stringBuilder.setLength(0);
+        stringBuilder.append(tab2).append("MULTIANEWARRAY ");
+        appendDescriptor(FIELD_DESCRIPTOR, descriptor);
+        stringBuilder.append(' ').append(numDimensions).append('\n');
+        text.add(stringBuilder.toString());
+    }
+
+    @Override
+    public Printer visitInsnAnnotation(
+            final int typeRef, final TypePath typePath, final String descriptor, final boolean visible) {
+        return visitTypeAnnotation(typeRef, typePath, descriptor, visible);
+    }
+
+    @Override
+    public void visitTryCatchBlock(
+            final Label start, final Label end, final Label handler, final String type) {
+        stringBuilder.setLength(0);
+        stringBuilder.append(tab2).append("TRYCATCHBLOCK ");
+        appendLabel(start);
+        stringBuilder.append(' ');
+        appendLabel(end);
+        stringBuilder.append(' ');
+        appendLabel(handler);
+        stringBuilder.append(' ');
+        appendDescriptor(INTERNAL_NAME, type);
+        stringBuilder.append('\n');
+        text.add(stringBuilder.toString());
+    }
+
+    @Override
+    public Printer visitTryCatchAnnotation(
+            final int typeRef, final TypePath typePath, final String descriptor, final boolean visible) {
+        stringBuilder.setLength(0);
+        stringBuilder.append(tab2).append("TRYCATCHBLOCK @");
+        appendDescriptor(FIELD_DESCRIPTOR, descriptor);
+        stringBuilder.append('(');
+        text.add(stringBuilder.toString());
+
+        stringBuilder.setLength(0);
+        stringBuilder.append(") : ");
+        appendTypeReference(typeRef);
+        stringBuilder.append(", ").append(typePath);
+        stringBuilder.append(visible ? "\n" : INVISIBLE);
+        return addNewTextifier(stringBuilder.toString());
+    }
+
+    @Override
+    public void visitLocalVariable(
+            final String name,
+            final String descriptor,
+            final String signature,
+            final Label start,
+            final Label end,
+            final int index) {
+        stringBuilder.setLength(0);
+        stringBuilder.append(tab2).append("LOCALVARIABLE ").append(name).append(' ');
+        appendDescriptor(FIELD_DESCRIPTOR, descriptor);
+        stringBuilder.append(' ');
+        appendLabel(start);
+        stringBuilder.append(' ');
+        appendLabel(end);
+        stringBuilder.append(' ').append(index).append('\n');
+
+        if (signature != null) {
+            stringBuilder.append(tab2);
+            appendDescriptor(FIELD_SIGNATURE, signature);
+            stringBuilder.append(tab2);
+            appendJavaDeclaration(name, signature);
+        }
+        text.add(stringBuilder.toString());
+    }
+
+    @Override
+    public Printer visitLocalVariableAnnotation(
+            final int typeRef,
+            final TypePath typePath,
+            final Label[] start,
+            final Label[] end,
+            final int[] index,
+            final String descriptor,
+            final boolean visible) {
+        stringBuilder.setLength(0);
+        stringBuilder.append(tab2).append("LOCALVARIABLE @");
+        appendDescriptor(FIELD_DESCRIPTOR, descriptor);
+        stringBuilder.append('(');
+        text.add(stringBuilder.toString());
+
+        stringBuilder.setLength(0);
+        stringBuilder.append(") : ");
+        appendTypeReference(typeRef);
+        stringBuilder.append(", ").append(typePath);
+        for (int i = 0; i < start.length; ++i) {
+            stringBuilder.append(" [ ");
+            appendLabel(start[i]);
+            stringBuilder.append(" - ");
+            appendLabel(end[i]);
+            stringBuilder.append(" - ").append(index[i]).append(" ]");
+        }
+        stringBuilder.append(visible ? "\n" : INVISIBLE);
+        return addNewTextifier(stringBuilder.toString());
+    }
+
+    @Override
+    public void visitLineNumber(final int line, final Label start) {
+        stringBuilder.setLength(0);
+        stringBuilder.append(tab2).append("LINENUMBER ").append(line).append(' ');
+        appendLabel(start);
+        stringBuilder.append('\n');
+        text.add(stringBuilder.toString());
+    }
+
+    @Override
+    public void visitMaxs(final int maxStack, final int maxLocals) {
+        stringBuilder.setLength(0);
+        stringBuilder.append(tab2).append("MAXSTACK = ").append(maxStack).append('\n');
+        text.add(stringBuilder.toString());
+
+        stringBuilder.setLength(0);
+        stringBuilder.append(tab2).append("MAXLOCALS = ").append(maxLocals).append('\n');
+        text.add(stringBuilder.toString());
+    }
+
+    @Override
+    public void visitMethodEnd() {
+        // Nothing to do.
+    }
+
+    // -----------------------------------------------------------------------------------------------
+    // Common methods
+    // -----------------------------------------------------------------------------------------------
+
+    /**
+      * Prints a disassembled view of the given annotation.
+      *
+      * @param descriptor the class descriptor of the annotation class.
+      * @param visible {@literal true} if the annotation is visible at runtime.
+      * @return a visitor to visit the annotation values.
+      */
+    // DontCheck(OverloadMethodsDeclarationOrder): overloads are semantically different.
+    public Textifier visitAnnotation(final String descriptor, final boolean visible) {
+        stringBuilder.setLength(0);
+        stringBuilder.append(tab).append('@');
+        appendDescriptor(FIELD_DESCRIPTOR, descriptor);
+        stringBuilder.append('(');
+        text.add(stringBuilder.toString());
+        return addNewTextifier(visible ? ")\n" : ") // invisible\n");
+    }
+
+    /**
+      * Prints a disassembled view of the given type annotation.
+      *
+      * @param typeRef a reference to the annotated type. See {@link TypeReference}.
+      * @param typePath the path to the annotated type argument, wildcard bound, array element type, or
+      *     static inner type within 'typeRef'. May be {@literal null} if the annotation targets
+      *     'typeRef' as a whole.
+      * @param descriptor the class descriptor of the annotation class.
+      * @param visible {@literal true} if the annotation is visible at runtime.
+      * @return a visitor to visit the annotation values.
+      */
+    public Textifier visitTypeAnnotation(
+            final int typeRef, final TypePath typePath, final String descriptor, final boolean visible) {
+        stringBuilder.setLength(0);
+        stringBuilder.append(tab).append('@');
+        appendDescriptor(FIELD_DESCRIPTOR, descriptor);
+        stringBuilder.append('(');
+        text.add(stringBuilder.toString());
+
+        stringBuilder.setLength(0);
+        stringBuilder.append(") : ");
+        appendTypeReference(typeRef);
+        stringBuilder.append(", ").append(typePath);
+        stringBuilder.append(visible ? "\n" : INVISIBLE);
+        return addNewTextifier(stringBuilder.toString());
+    }
+
+    /**
+      * Prints a disassembled view of the given attribute.
+      *
+      * @param attribute an attribute.
+      */
+    public void visitAttribute(final Attribute attribute) {
+        stringBuilder.setLength(0);
+        stringBuilder.append(tab).append("ATTRIBUTE ");
+        appendDescriptor(-1, attribute.type);
+
+        if (attribute instanceof TextifierSupport) {
+            if (labelNames == null) {
+                labelNames = new HashMap<>();
+            }
+            ((TextifierSupport) attribute).textify(stringBuilder, labelNames);
+        } else {
+            stringBuilder.append(" : unknown\n");
+        }
+
+        text.add(stringBuilder.toString());
+    }
+
+    // -----------------------------------------------------------------------------------------------
+    // Utility methods
+    // -----------------------------------------------------------------------------------------------
+
+    /**
+      * Appends a string representation of the given access flags to {@link #stringBuilder}.
+      *
+      * @param accessFlags some access flags.
+      */
+    private void appendAccess(final int accessFlags) {
+        if ((accessFlags & Opcodes.ACC_PUBLIC) != 0) {
+            stringBuilder.append("public ");
+        }
+        if ((accessFlags & Opcodes.ACC_PRIVATE) != 0) {
+            stringBuilder.append("private ");
+        }
+        if ((accessFlags & Opcodes.ACC_PROTECTED) != 0) {
+            stringBuilder.append("protected ");
+        }
+        if ((accessFlags & Opcodes.ACC_FINAL) != 0) {
+            stringBuilder.append("final ");
+        }
+        if ((accessFlags & Opcodes.ACC_STATIC) != 0) {
+            stringBuilder.append("static ");
+        }
+        if ((accessFlags & Opcodes.ACC_SYNCHRONIZED) != 0) {
+            stringBuilder.append("synchronized ");
+        }
+        if ((accessFlags & Opcodes.ACC_VOLATILE) != 0) {
+            stringBuilder.append("volatile ");
+        }
+        if ((accessFlags & Opcodes.ACC_TRANSIENT) != 0) {
+            stringBuilder.append("transient ");
+        }
+        if ((accessFlags & Opcodes.ACC_ABSTRACT) != 0) {
+            stringBuilder.append("abstract ");
+        }
+        if ((accessFlags & Opcodes.ACC_STRICT) != 0) {
+            stringBuilder.append("strictfp ");
+        }
+        if ((accessFlags & Opcodes.ACC_SYNTHETIC) != 0) {
+            stringBuilder.append("synthetic ");
+        }
+        if ((accessFlags & Opcodes.ACC_MANDATED) != 0) {
+            stringBuilder.append("mandated ");
+        }
+        if ((accessFlags & Opcodes.ACC_ENUM) != 0) {
+            stringBuilder.append("enum ");
+        }
+    }
+
+    /**
+      * Appends the hexadecimal value of the given access flags to {@link #stringBuilder}.
+      *
+      * @param accessFlags some access flags.
+      */
+    private void appendRawAccess(final int accessFlags) {
+        stringBuilder
+                .append("// access flags 0x")
+                .append(Integer.toHexString(accessFlags).toUpperCase())
+                .append('\n');
+    }
+
+    /**
+      * Appends an internal name, a type descriptor or a type signature to {@link #stringBuilder}.
+      *
+      * @param type the type of 'value'. Must be one of {@link #INTERNAL_NAME}, {@link
+      *     #FIELD_DESCRIPTOR}, {@link #FIELD_SIGNATURE}, {@link #METHOD_DESCRIPTOR}, {@link
+      *     #METHOD_SIGNATURE}, {@link #CLASS_SIGNATURE} or {@link #HANDLE_DESCRIPTOR}.
+      * @param value an internal name (see {@link Type#getInternalName()}), type descriptor or a type
+      *     signature. May be {@literal null}.
+      */
+    protected void appendDescriptor(final int type, final String value) {
+        if (type == CLASS_SIGNATURE || type == FIELD_SIGNATURE || type == METHOD_SIGNATURE) {
+            if (value != null) {
+                stringBuilder.append("// signature ").append(value).append('\n');
+            }
+        } else {
+            stringBuilder.append(value);
+        }
+    }
+
+    /**
+      * Appends the Java generic type declaration corresponding to the given signature.
+      *
+      * @param name a class, field or method name.
+      * @param signature a class, field or method signature.
+      */
+    private void appendJavaDeclaration(final String name, final String signature) {
+        TraceSignatureVisitor traceSignatureVisitor = new TraceSignatureVisitor(access);
+        new SignatureReader(signature).accept(traceSignatureVisitor);
+        stringBuilder.append("// declaration: ");
+        if (traceSignatureVisitor.getReturnType() != null) {
+            stringBuilder.append(traceSignatureVisitor.getReturnType());
+            stringBuilder.append(' ');
+        }
+        stringBuilder.append(name);
+        stringBuilder.append(traceSignatureVisitor.getDeclaration());
+        if (traceSignatureVisitor.getExceptions() != null) {
+            stringBuilder.append(" throws ").append(traceSignatureVisitor.getExceptions());
+        }
+        stringBuilder.append('\n');
+    }
+
+    /**
+      * Appends the name of the given label to {@link #stringBuilder}. Constructs a new label name if
+      * the given label does not yet have one.
+      *
+      * @param label a label.
+      */
+    protected void appendLabel(final Label label) {
+        if (labelNames == null) {
+            labelNames = new HashMap<>();
+        }
+        String name = labelNames.get(label);
+        if (name == null) {
+            name = "L" + labelNames.size();
+            labelNames.put(label, name);
+        }
+        stringBuilder.append(name);
+    }
+
+    /**
+      * Appends a string representation of the given handle to {@link #stringBuilder}.
+      *
+      * @param handle a handle.
+      */
+    protected void appendHandle(final Handle handle) {
+        int tag = handle.getTag();
+        stringBuilder.append("// handle kind 0x").append(Integer.toHexString(tag)).append(" : ");
+        boolean isMethodHandle = false;
+        switch (tag) {
+            case Opcodes.H_GETFIELD:
+                stringBuilder.append("GETFIELD");
+                break;
+            case Opcodes.H_GETSTATIC:
+                stringBuilder.append("GETSTATIC");
+                break;
+            case Opcodes.H_PUTFIELD:
+                stringBuilder.append("PUTFIELD");
+                break;
+            case Opcodes.H_PUTSTATIC:
+                stringBuilder.append("PUTSTATIC");
+                break;
+            case Opcodes.H_INVOKEINTERFACE:
+                stringBuilder.append("INVOKEINTERFACE");
+                isMethodHandle = true;
+                break;
+            case Opcodes.H_INVOKESPECIAL:
+                stringBuilder.append("INVOKESPECIAL");
+                isMethodHandle = true;
+                break;
+            case Opcodes.H_INVOKESTATIC:
+                stringBuilder.append("INVOKESTATIC");
+                isMethodHandle = true;
+                break;
+            case Opcodes.H_INVOKEVIRTUAL:
+                stringBuilder.append("INVOKEVIRTUAL");
+                isMethodHandle = true;
+                break;
+            case Opcodes.H_NEWINVOKESPECIAL:
+                stringBuilder.append("NEWINVOKESPECIAL");
+                isMethodHandle = true;
+                break;
+            default:
+                throw new IllegalArgumentException();
+        }
+        stringBuilder.append('\n');
+        stringBuilder.append(tab3);
+        appendDescriptor(INTERNAL_NAME, handle.getOwner());
+        stringBuilder.append('.');
+        stringBuilder.append(handle.getName());
+        if (!isMethodHandle) {
+            stringBuilder.append('(');
+        }
+        appendDescriptor(HANDLE_DESCRIPTOR, handle.getDesc());
+        if (!isMethodHandle) {
+            stringBuilder.append(')');
+        }
+        if (handle.isInterface()) {
+            stringBuilder.append(" itf");
+        }
+    }
+
+    /**
+      * Appends a comma to {@link #stringBuilder} if the given number is strictly positive.
+      *
+      * @param numValues a number of 'values visited so far', for instance the number of annotation
+      *     values visited so far in an annotation visitor.
+      */
+    private void maybeAppendComma(final int numValues) {
+        if (numValues > 0) {
+            stringBuilder.append(", ");
+        }
+    }
+
+    /**
+      * Appends a string representation of the given type reference to {@link #stringBuilder}.
+      *
+      * @param typeRef a type reference. See {@link TypeReference}.
+      */
+    private void appendTypeReference(final int typeRef) {
+        TypeReference typeReference = new TypeReference(typeRef);
+        switch (typeReference.getSort()) {
+            case TypeReference.CLASS_TYPE_PARAMETER:
+                stringBuilder.append("CLASS_TYPE_PARAMETER ").append(typeReference.getTypeParameterIndex());
+                break;
+            case TypeReference.METHOD_TYPE_PARAMETER:
+                stringBuilder
+                        .append("METHOD_TYPE_PARAMETER ")
+                        .append(typeReference.getTypeParameterIndex());
+                break;
+            case TypeReference.CLASS_EXTENDS:
+                stringBuilder.append("CLASS_EXTENDS ").append(typeReference.getSuperTypeIndex());
+                break;
+            case TypeReference.CLASS_TYPE_PARAMETER_BOUND:
+                stringBuilder
+                        .append("CLASS_TYPE_PARAMETER_BOUND ")
+                        .append(typeReference.getTypeParameterIndex())
+                        .append(", ")
+                        .append(typeReference.getTypeParameterBoundIndex());
+                break;
+            case TypeReference.METHOD_TYPE_PARAMETER_BOUND:
+                stringBuilder
+                        .append("METHOD_TYPE_PARAMETER_BOUND ")
+                        .append(typeReference.getTypeParameterIndex())
+                        .append(", ")
+                        .append(typeReference.getTypeParameterBoundIndex());
+                break;
+            case TypeReference.FIELD:
+                stringBuilder.append("FIELD");
+                break;
+            case TypeReference.METHOD_RETURN:
+                stringBuilder.append("METHOD_RETURN");
+                break;
+            case TypeReference.METHOD_RECEIVER:
+                stringBuilder.append("METHOD_RECEIVER");
+                break;
+            case TypeReference.METHOD_FORMAL_PARAMETER:
+                stringBuilder
+                        .append("METHOD_FORMAL_PARAMETER ")
+                        .append(typeReference.getFormalParameterIndex());
+                break;
+            case TypeReference.THROWS:
+                stringBuilder.append("THROWS ").append(typeReference.getExceptionIndex());
+                break;
+            case TypeReference.LOCAL_VARIABLE:
+                stringBuilder.append("LOCAL_VARIABLE");
+                break;
+            case TypeReference.RESOURCE_VARIABLE:
+                stringBuilder.append("RESOURCE_VARIABLE");
+                break;
+            case TypeReference.EXCEPTION_PARAMETER:
+                stringBuilder.append("EXCEPTION_PARAMETER ").append(typeReference.getTryCatchBlockIndex());
+                break;
+            case TypeReference.INSTANCEOF:
+                stringBuilder.append("INSTANCEOF");
+                break;
+            case TypeReference.NEW:
+                stringBuilder.append("NEW");
+                break;
+            case TypeReference.CONSTRUCTOR_REFERENCE:
+                stringBuilder.append("CONSTRUCTOR_REFERENCE");
+                break;
+            case TypeReference.METHOD_REFERENCE:
+                stringBuilder.append("METHOD_REFERENCE");
+                break;
+            case TypeReference.CAST:
+                stringBuilder.append("CAST ").append(typeReference.getTypeArgumentIndex());
+                break;
+            case TypeReference.CONSTRUCTOR_INVOCATION_TYPE_ARGUMENT:
+                stringBuilder
+                        .append("CONSTRUCTOR_INVOCATION_TYPE_ARGUMENT ")
+                        .append(typeReference.getTypeArgumentIndex());
+                break;
+            case TypeReference.METHOD_INVOCATION_TYPE_ARGUMENT:
+                stringBuilder
+                        .append("METHOD_INVOCATION_TYPE_ARGUMENT ")
+                        .append(typeReference.getTypeArgumentIndex());
+                break;
+            case TypeReference.CONSTRUCTOR_REFERENCE_TYPE_ARGUMENT:
+                stringBuilder
+                        .append("CONSTRUCTOR_REFERENCE_TYPE_ARGUMENT ")
+                        .append(typeReference.getTypeArgumentIndex());
+                break;
+            case TypeReference.METHOD_REFERENCE_TYPE_ARGUMENT:
+                stringBuilder
+                        .append("METHOD_REFERENCE_TYPE_ARGUMENT ")
+                        .append(typeReference.getTypeArgumentIndex());
+                break;
+            default:
+                throw new IllegalArgumentException();
+        }
+    }
+
+    /**
+      * Appends the given stack map frame types to {@link #stringBuilder}.
+      *
+      * @param numTypes the number of stack map frame types in 'frameTypes'.
+      * @param frameTypes an array of stack map frame types, in the format described in {@link
+      *     jdk.internal.org.objectweb.asm.MethodVisitor#visitFrame}.
+      */
+    private void appendFrameTypes(final int numTypes, final Object[] frameTypes) {
+        for (int i = 0; i < numTypes; ++i) {
+            if (i > 0) {
+                stringBuilder.append(' ');
+            }
+            if (frameTypes[i] instanceof String) {
+                String descriptor = (String) frameTypes[i];
+                if (descriptor.charAt(0) == '[') {
+                    appendDescriptor(FIELD_DESCRIPTOR, descriptor);
+                } else {
+                    appendDescriptor(INTERNAL_NAME, descriptor);
+                }
+            } else if (frameTypes[i] instanceof Integer) {
+                stringBuilder.append(FRAME_TYPES.get(((Integer) frameTypes[i]).intValue()));
+            } else {
+                appendLabel((Label) frameTypes[i]);
+            }
+        }
+    }
+
+    /**
+      * Creates and adds to {@link #text} a new {@link Textifier}, followed by the given string.
+      *
+      * @param endText the text to add to {@link #text} after the textifier. May be {@literal null}.
+      * @return the newly created {@link Textifier}.
+      */
+    private Textifier addNewTextifier(final String endText) {
+        Textifier textifier = createTextifier();
+        text.add(textifier.getText());
+        if (endText != null) {
+            text.add(endText);
+        }
+        return textifier;
+    }
+
+    /**
+      * Creates a new {@link Textifier}.
+      *
+      * @return a new {@link Textifier}.
+      */
+    protected Textifier createTextifier() {
+        return new Textifier(api);
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/org/objectweb/asm/util/TextifierSupport.class b/tests/test_data/std/jdk/internal/org/objectweb/asm/util/TextifierSupport.class
new file mode 100644
index 0000000000000000000000000000000000000000..292e12161262d393b8bdfc952f1ea313ca3ff97f
GIT binary patch
literal 337
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zbTgWro!R~TI(-0m!fk>MVP0?dLK(-_NG%#$iKeKzbZ=Y;d3X`tDJ|A~bZV#A=Duwk
z>k`}$?rQleg_fogt7su4E)KpErjzVX&Ye}JT6m?mY}2z4_dd%uz26XqxvGqG-ZFu&
zbv|VORL^9=`Zq4tJoiW+W9BGtye)aDbO;?^UO4+{-zN~d;aLEMgL~))o&?sxAfRDH
Fqi;j$W}5&2

literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/org/objectweb/asm/util/TextifierSupport.java b/tests/test_data/std/jdk/internal/org/objectweb/asm/util/TextifierSupport.java
new file mode 100644
index 00000000..4ce8fe80
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/org/objectweb/asm/util/TextifierSupport.java
@@ -0,0 +1,79 @@
+/*
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/*
+ * This file is available under and governed by the GNU General Public
+ * License version 2 only, as published by the Free Software Foundation.
+ * However, the following notice accompanied the original version of this
+ * file:
+ *
+ * ASM: a very small and fast Java bytecode manipulation framework
+ * Copyright (c) 2000-2011 INRIA, France Telecom
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the copyright holders nor the names of its
+ *    contributors may be used to endorse or promote products derived from
+ *    this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+package jdk.internal.org.objectweb.asm.util;
+
+import java.util.Map;
+import jdk.internal.org.objectweb.asm.Label;
+
+/**
+ * An {@link jdk.internal.org.objectweb.asm.Attribute} that can print a readable representation of itself.
+ *
+ * @author Eugene Kuleshov
+ */
+public interface TextifierSupport {
+
+    /**
+      * Generates a human readable representation of this attribute.
+      *
+      * @param outputBuilder where the human representation of this attribute must be appended.
+      * @param labelNames the human readable names of the labels.
+      */
+    void textify(StringBuilder outputBuilder, Map<Label, String> labelNames);
+}
diff --git a/tests/test_data/std/jdk/internal/org/objectweb/asm/util/TraceAnnotationVisitor.class b/tests/test_data/std/jdk/internal/org/objectweb/asm/util/TraceAnnotationVisitor.class
new file mode 100644
index 0000000000000000000000000000000000000000..0ed3a6cedb466f92c8c96cd7b9e29ee7539d1ef3
GIT binary patch
literal 2178
zcmb`Ji%t_k6o&t4OH0c_OBHIx3*Mk?TNY4JD4>Xtm>{SnjU;NaZ8xyk?vm{m<K>|=
zQJQGt1NczJGqdZqwv7d2nzXaCGyiwae`Zel<LB4!0M@V`fe-!=0uuTVWLP{XzgBd^
z)+|G<D5kZin8gFFWWUjhidw5Gbz83}JC<6~Rt>|nRa-ZWf?m^Y(_#oN>4t8vFcedp
zJ#;#D=X&iB<R_MhEjLvNp`T%*2W9)PWR|s>A7LPZ0Z1VX@<fLiW_oPx2#{eu^{7{n
z9lI#fFgYBPFpM}u=+H@kA=^vpk9;FIi;)mUB_wc;A>AYR*1ZgUN4!7`lT;P;NL4DT
zv8Uv1ie!&m_hz<5p($YQ)CebzNw|QE3}GR#Zq%y`3x5~slyzqu*)c9VF5wEUGDL-J
z(=vwqiNvQ)Y25&>bK(t#=l@5)8M1ryb3Cm{2`Nl5M4YrNOMT0*+J$)f_|sfE!?5u$
zYTcuqmY`sUA>LMmb)(GSPdVk9lW>zS>KBW|s~HO61TCU@Q5gbjbP1{4o4TQG)vHC#
z+EI%Ynu%|kCACseEuBBRlL32QuQ4p02-Ce2<rs$5&h|9dOS01`3f@qwBGl$ZaZfbA
zSZbx-_R_sYbPTBRlq~&FbjFr&TxS?0l^+rBF_JgyR!Q5?xie$k6PxBiV3r!n0CjIN
zkaratg=pM|Tl9UKp6<a<D`-|`=?2&*8u~C#-@MlYPZ7j3+@aB^vkZ5!Ku=tT%P}Dq
zbj9){=BIaqay(3G5jpb((Wc~(c=>|1zJ!EVLU!EQ;K>eR5jm105drYgnA(^ND7b)_
z{29@7<``$>bf$r1JEKTVyo4yqEsU7Qh+zrKf)T?CIlvjzyIe*Q0r~)Ohmk$Td4gmc
zxYSPBCzEuF@<32zXO~Bbdz3it6OY>&C*CsUz<7&sc^XxN^OC=Fy1exbzFm>nHNvuw
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/org/objectweb/asm/util/TraceAnnotationVisitor.java b/tests/test_data/std/jdk/internal/org/objectweb/asm/util/TraceAnnotationVisitor.java
new file mode 100644
index 00000000..f487c69c
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/org/objectweb/asm/util/TraceAnnotationVisitor.java
@@ -0,0 +1,125 @@
+/*
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/*
+ * This file is available under and governed by the GNU General Public
+ * License version 2 only, as published by the Free Software Foundation.
+ * However, the following notice accompanied the original version of this
+ * file:
+ *
+ * ASM: a very small and fast Java bytecode manipulation framework
+ * Copyright (c) 2000-2011 INRIA, France Telecom
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the copyright holders nor the names of its
+ *    contributors may be used to endorse or promote products derived from
+ *    this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+package jdk.internal.org.objectweb.asm.util;
+
+import jdk.internal.org.objectweb.asm.AnnotationVisitor;
+import jdk.internal.org.objectweb.asm.Opcodes;
+
+/**
+ * An {@link AnnotationVisitor} that prints the annotations it visits with a {@link Printer}.
+ *
+ * @author Eric Bruneton
+ */
+public final class TraceAnnotationVisitor extends AnnotationVisitor {
+
+    /** The printer to convert the visited annotation into text. */
+    private final Printer printer;
+
+    /**
+      * Constructs a new {@link TraceAnnotationVisitor}.
+      *
+      * @param printer the printer to convert the visited annotation into text.
+      */
+    public TraceAnnotationVisitor(final Printer printer) {
+        this(null, printer);
+    }
+
+    /**
+      * Constructs a new {@link TraceAnnotationVisitor}.
+      *
+      * @param annotationVisitor the annotation visitor to which to delegate calls. May be {@literal
+      *     null}.
+      * @param printer the printer to convert the visited annotation into text.
+      */
+    public TraceAnnotationVisitor(final AnnotationVisitor annotationVisitor, final Printer printer) {
+        super(/* latest api = */ Opcodes.ASM9, annotationVisitor);
+        this.printer = printer;
+    }
+
+    @Override
+    public void visit(final String name, final Object value) {
+        printer.visit(name, value);
+        super.visit(name, value);
+    }
+
+    @Override
+    public void visitEnum(final String name, final String descriptor, final String value) {
+        printer.visitEnum(name, descriptor, value);
+        super.visitEnum(name, descriptor, value);
+    }
+
+    @Override
+    public AnnotationVisitor visitAnnotation(final String name, final String descriptor) {
+        Printer annotationPrinter = printer.visitAnnotation(name, descriptor);
+        return new TraceAnnotationVisitor(super.visitAnnotation(name, descriptor), annotationPrinter);
+    }
+
+    @Override
+    public AnnotationVisitor visitArray(final String name) {
+        Printer arrayPrinter = printer.visitArray(name);
+        return new TraceAnnotationVisitor(super.visitArray(name), arrayPrinter);
+    }
+
+    @Override
+    public void visitEnd() {
+        printer.visitAnnotationEnd();
+        super.visitEnd();
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/org/objectweb/asm/util/TraceClassVisitor.class b/tests/test_data/std/jdk/internal/org/objectweb/asm/util/TraceClassVisitor.class
new file mode 100644
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HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/org/objectweb/asm/util/TraceClassVisitor.java b/tests/test_data/std/jdk/internal/org/objectweb/asm/util/TraceClassVisitor.java
new file mode 100644
index 00000000..a6e58402
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/org/objectweb/asm/util/TraceClassVisitor.java
@@ -0,0 +1,276 @@
+/*
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/*
+ * This file is available under and governed by the GNU General Public
+ * License version 2 only, as published by the Free Software Foundation.
+ * However, the following notice accompanied the original version of this
+ * file:
+ *
+ * ASM: a very small and fast Java bytecode manipulation framework
+ * Copyright (c) 2000-2011 INRIA, France Telecom
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the copyright holders nor the names of its
+ *    contributors may be used to endorse or promote products derived from
+ *    this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+package jdk.internal.org.objectweb.asm.util;
+
+import java.io.PrintWriter;
+import jdk.internal.org.objectweb.asm.AnnotationVisitor;
+import jdk.internal.org.objectweb.asm.Attribute;
+import jdk.internal.org.objectweb.asm.ClassVisitor;
+import jdk.internal.org.objectweb.asm.FieldVisitor;
+import jdk.internal.org.objectweb.asm.MethodVisitor;
+import jdk.internal.org.objectweb.asm.ModuleVisitor;
+import jdk.internal.org.objectweb.asm.Opcodes;
+import jdk.internal.org.objectweb.asm.RecordComponentVisitor;
+import jdk.internal.org.objectweb.asm.TypePath;
+
+/**
+ * A {@link ClassVisitor} that prints the classes it visits with a {@link Printer}. This class
+ * visitor can be used in the middle of a class visitor chain to trace the class that is visited at
+ * a given point in this chain. This may be useful for debugging purposes.
+ *
+ * <p>When used with a {@link Textifier}, the trace printed when visiting the {@code Hello} class is
+ * the following:
+ *
+ * <pre>
+ * // class version 49.0 (49) // access flags 0x21 public class Hello {
+ *
+ * // compiled from: Hello.java
+ *
+ * // access flags 0x1
+ * public &lt;init&gt; ()V
+ * ALOAD 0
+ * INVOKESPECIAL java/lang/Object &lt;init&gt; ()V
+ * RETURN
+ * MAXSTACK = 1 MAXLOCALS = 1
+ *
+ * // access flags 0x9
+ * public static main ([Ljava/lang/String;)V
+ * GETSTATIC java/lang/System out Ljava/io/PrintStream;
+ * LDC &quot;hello&quot;
+ * INVOKEVIRTUAL java/io/PrintStream println (Ljava/lang/String;)V
+ * RETURN
+ * MAXSTACK = 2 MAXLOCALS = 1
+ * }
+ * </pre>
+ *
+ * <p>where {@code Hello} is defined by:
+ *
+ * <pre>
+ * public class Hello {
+ *
+ *   public static void main(String[] args) {
+ *     System.out.println(&quot;hello&quot;);
+ *   }
+ * }
+ * </pre>
+ *
+ * @author Eric Bruneton
+ * @author Eugene Kuleshov
+ */
+public final class TraceClassVisitor extends ClassVisitor {
+
+    /** The print writer to be used to print the class. May be {@literal null}. */
+    private final PrintWriter printWriter;
+
+    /** The printer to convert the visited class into text. */
+    // DontCheck(MemberName): can't be renamed (for backward binary compatibility).
+    public final Printer p;
+
+    /**
+      * Constructs a new {@link TraceClassVisitor}.
+      *
+      * @param printWriter the print writer to be used to print the class. May be {@literal null}.
+      */
+    public TraceClassVisitor(final PrintWriter printWriter) {
+        this(null, printWriter);
+    }
+
+    /**
+      * Constructs a new {@link TraceClassVisitor}.
+      *
+      * @param classVisitor the class visitor to which to delegate calls. May be {@literal null}.
+      * @param printWriter the print writer to be used to print the class. May be {@literal null}.
+      */
+    public TraceClassVisitor(final ClassVisitor classVisitor, final PrintWriter printWriter) {
+        this(classVisitor, new Textifier(), printWriter);
+    }
+
+    /**
+      * Constructs a new {@link TraceClassVisitor}.
+      *
+      * @param classVisitor the class visitor to which to delegate calls. May be {@literal null}.
+      * @param printer the printer to convert the visited class into text.
+      * @param printWriter the print writer to be used to print the class. May be {@literal null}.
+      */
+    public TraceClassVisitor(
+            final ClassVisitor classVisitor, final Printer printer, final PrintWriter printWriter) {
+        super(/* latest api = */ Opcodes.ASM9, classVisitor);
+        this.printWriter = printWriter;
+        this.p = printer;
+    }
+
+    @Override
+    public void visit(
+            final int version,
+            final int access,
+            final String name,
+            final String signature,
+            final String superName,
+            final String[] interfaces) {
+        p.visit(version, access, name, signature, superName, interfaces);
+        super.visit(version, access, name, signature, superName, interfaces);
+    }
+
+    @Override
+    public void visitSource(final String file, final String debug) {
+        p.visitSource(file, debug);
+        super.visitSource(file, debug);
+    }
+
+    @Override
+    public ModuleVisitor visitModule(final String name, final int flags, final String version) {
+        Printer modulePrinter = p.visitModule(name, flags, version);
+        return new TraceModuleVisitor(super.visitModule(name, flags, version), modulePrinter);
+    }
+
+    @Override
+    public void visitNestHost(final String nestHost) {
+        p.visitNestHost(nestHost);
+        super.visitNestHost(nestHost);
+    }
+
+    @Override
+    public void visitOuterClass(final String owner, final String name, final String descriptor) {
+        p.visitOuterClass(owner, name, descriptor);
+        super.visitOuterClass(owner, name, descriptor);
+    }
+
+    @Override
+    public AnnotationVisitor visitAnnotation(final String descriptor, final boolean visible) {
+        Printer annotationPrinter = p.visitClassAnnotation(descriptor, visible);
+        return new TraceAnnotationVisitor(
+                super.visitAnnotation(descriptor, visible), annotationPrinter);
+    }
+
+    @Override
+    public AnnotationVisitor visitTypeAnnotation(
+            final int typeRef, final TypePath typePath, final String descriptor, final boolean visible) {
+        Printer annotationPrinter = p.visitClassTypeAnnotation(typeRef, typePath, descriptor, visible);
+        return new TraceAnnotationVisitor(
+                super.visitTypeAnnotation(typeRef, typePath, descriptor, visible), annotationPrinter);
+    }
+
+    @Override
+    public void visitAttribute(final Attribute attribute) {
+        p.visitClassAttribute(attribute);
+        super.visitAttribute(attribute);
+    }
+
+    @Override
+    public void visitNestMember(final String nestMember) {
+        p.visitNestMember(nestMember);
+        super.visitNestMember(nestMember);
+    }
+
+    @Override
+    public void visitPermittedSubclass(final String permittedSubclass) {
+        p.visitPermittedSubclass(permittedSubclass);
+        super.visitPermittedSubclass(permittedSubclass);
+    }
+
+    @Override
+    public void visitInnerClass(
+            final String name, final String outerName, final String innerName, final int access) {
+        p.visitInnerClass(name, outerName, innerName, access);
+        super.visitInnerClass(name, outerName, innerName, access);
+    }
+
+    @Override
+    public RecordComponentVisitor visitRecordComponent(
+            final String name, final String descriptor, final String signature) {
+        Printer recordComponentPrinter = p.visitRecordComponent(name, descriptor, signature);
+        return new TraceRecordComponentVisitor(
+                super.visitRecordComponent(name, descriptor, signature), recordComponentPrinter);
+    }
+
+    @Override
+    public FieldVisitor visitField(
+            final int access,
+            final String name,
+            final String descriptor,
+            final String signature,
+            final Object value) {
+        Printer fieldPrinter = p.visitField(access, name, descriptor, signature, value);
+        return new TraceFieldVisitor(
+                super.visitField(access, name, descriptor, signature, value), fieldPrinter);
+    }
+
+    @Override
+    public MethodVisitor visitMethod(
+            final int access,
+            final String name,
+            final String descriptor,
+            final String signature,
+            final String[] exceptions) {
+        Printer methodPrinter = p.visitMethod(access, name, descriptor, signature, exceptions);
+        return new TraceMethodVisitor(
+                super.visitMethod(access, name, descriptor, signature, exceptions), methodPrinter);
+    }
+
+    @Override
+    public void visitEnd() {
+        p.visitClassEnd();
+        if (printWriter != null) {
+            p.print(printWriter);
+            printWriter.flush();
+        }
+        super.visitEnd();
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/org/objectweb/asm/util/TraceFieldVisitor.class b/tests/test_data/std/jdk/internal/org/objectweb/asm/util/TraceFieldVisitor.class
new file mode 100644
index 0000000000000000000000000000000000000000..815a76270b3e31e2363c4037076e6d14d49e7c0b
GIT binary patch
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/org/objectweb/asm/util/TraceFieldVisitor.java b/tests/test_data/std/jdk/internal/org/objectweb/asm/util/TraceFieldVisitor.java
new file mode 100644
index 00000000..1dd448c6
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/org/objectweb/asm/util/TraceFieldVisitor.java
@@ -0,0 +1,125 @@
+/*
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/*
+ * This file is available under and governed by the GNU General Public
+ * License version 2 only, as published by the Free Software Foundation.
+ * However, the following notice accompanied the original version of this
+ * file:
+ *
+ * ASM: a very small and fast Java bytecode manipulation framework
+ * Copyright (c) 2000-2011 INRIA, France Telecom
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the copyright holders nor the names of its
+ *    contributors may be used to endorse or promote products derived from
+ *    this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+package jdk.internal.org.objectweb.asm.util;
+
+import jdk.internal.org.objectweb.asm.AnnotationVisitor;
+import jdk.internal.org.objectweb.asm.Attribute;
+import jdk.internal.org.objectweb.asm.FieldVisitor;
+import jdk.internal.org.objectweb.asm.Opcodes;
+import jdk.internal.org.objectweb.asm.TypePath;
+
+/**
+ * A {@link FieldVisitor} that prints the fields it visits with a {@link Printer}.
+ *
+ * @author Eric Bruneton
+ */
+public final class TraceFieldVisitor extends FieldVisitor {
+
+    /** The printer to convert the visited field into text. */
+    // DontCheck(MemberName): can't be renamed (for backward binary compatibility).
+    public final Printer p;
+
+    /**
+      * Constructs a new {@link TraceFieldVisitor}.
+      *
+      * @param printer the printer to convert the visited field into text.
+      */
+    public TraceFieldVisitor(final Printer printer) {
+        this(null, printer);
+    }
+
+    /**
+      * Constructs a new {@link TraceFieldVisitor}.
+      *
+      * @param fieldVisitor the field visitor to which to delegate calls. May be {@literal null}.
+      * @param printer the printer to convert the visited field into text.
+      */
+    public TraceFieldVisitor(final FieldVisitor fieldVisitor, final Printer printer) {
+        super(/* latest api = */ Opcodes.ASM9, fieldVisitor);
+        this.p = printer;
+    }
+
+    @Override
+    public AnnotationVisitor visitAnnotation(final String descriptor, final boolean visible) {
+        Printer annotationPrinter = p.visitFieldAnnotation(descriptor, visible);
+        return new TraceAnnotationVisitor(
+                super.visitAnnotation(descriptor, visible), annotationPrinter);
+    }
+
+    @Override
+    public AnnotationVisitor visitTypeAnnotation(
+            final int typeRef, final TypePath typePath, final String descriptor, final boolean visible) {
+        Printer annotationPrinter = p.visitFieldTypeAnnotation(typeRef, typePath, descriptor, visible);
+        return new TraceAnnotationVisitor(
+                super.visitTypeAnnotation(typeRef, typePath, descriptor, visible), annotationPrinter);
+    }
+
+    @Override
+    public void visitAttribute(final Attribute attribute) {
+        p.visitFieldAttribute(attribute);
+        super.visitAttribute(attribute);
+    }
+
+    @Override
+    public void visitEnd() {
+        p.visitFieldEnd();
+        super.visitEnd();
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/org/objectweb/asm/util/TraceMethodVisitor.class b/tests/test_data/std/jdk/internal/org/objectweb/asm/util/TraceMethodVisitor.class
new file mode 100644
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diff --git a/tests/test_data/std/jdk/internal/org/objectweb/asm/util/TraceMethodVisitor.java b/tests/test_data/std/jdk/internal/org/objectweb/asm/util/TraceMethodVisitor.java
new file mode 100644
index 00000000..06f96819
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/org/objectweb/asm/util/TraceMethodVisitor.java
@@ -0,0 +1,344 @@
+/*
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/*
+ * This file is available under and governed by the GNU General Public
+ * License version 2 only, as published by the Free Software Foundation.
+ * However, the following notice accompanied the original version of this
+ * file:
+ *
+ * ASM: a very small and fast Java bytecode manipulation framework
+ * Copyright (c) 2000-2011 INRIA, France Telecom
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the copyright holders nor the names of its
+ *    contributors may be used to endorse or promote products derived from
+ *    this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+package jdk.internal.org.objectweb.asm.util;
+
+import jdk.internal.org.objectweb.asm.AnnotationVisitor;
+import jdk.internal.org.objectweb.asm.Attribute;
+import jdk.internal.org.objectweb.asm.Handle;
+import jdk.internal.org.objectweb.asm.Label;
+import jdk.internal.org.objectweb.asm.MethodVisitor;
+import jdk.internal.org.objectweb.asm.Opcodes;
+import jdk.internal.org.objectweb.asm.TypePath;
+
+/**
+ * A {@link MethodVisitor} that prints the methods it visits with a {@link Printer}.
+ *
+ * @author Eric Bruneton
+ */
+public final class TraceMethodVisitor extends MethodVisitor {
+
+    /** The printer to convert the visited method into text. */
+    // DontCheck(MemberName): can't be renamed (for backward binary compatibility).
+    public final Printer p;
+
+    /**
+      * Constructs a new {@link TraceMethodVisitor}.
+      *
+      * @param printer the printer to convert the visited method into text.
+      */
+    public TraceMethodVisitor(final Printer printer) {
+        this(null, printer);
+    }
+
+    /**
+      * Constructs a new {@link TraceMethodVisitor}.
+      *
+      * @param methodVisitor the method visitor to which to delegate calls. May be {@literal null}.
+      * @param printer the printer to convert the visited method into text.
+      */
+    public TraceMethodVisitor(final MethodVisitor methodVisitor, final Printer printer) {
+        super(/* latest api = */ Opcodes.ASM9, methodVisitor);
+        this.p = printer;
+    }
+
+    @Override
+    public void visitParameter(final String name, final int access) {
+        p.visitParameter(name, access);
+        super.visitParameter(name, access);
+    }
+
+    @Override
+    public AnnotationVisitor visitAnnotation(final String descriptor, final boolean visible) {
+        Printer annotationPrinter = p.visitMethodAnnotation(descriptor, visible);
+        return new TraceAnnotationVisitor(
+                super.visitAnnotation(descriptor, visible), annotationPrinter);
+    }
+
+    @Override
+    public AnnotationVisitor visitTypeAnnotation(
+            final int typeRef, final TypePath typePath, final String descriptor, final boolean visible) {
+        Printer annotationPrinter = p.visitMethodTypeAnnotation(typeRef, typePath, descriptor, visible);
+        return new TraceAnnotationVisitor(
+                super.visitTypeAnnotation(typeRef, typePath, descriptor, visible), annotationPrinter);
+    }
+
+    @Override
+    public void visitAttribute(final Attribute attribute) {
+        p.visitMethodAttribute(attribute);
+        super.visitAttribute(attribute);
+    }
+
+    @Override
+    public AnnotationVisitor visitAnnotationDefault() {
+        Printer annotationPrinter = p.visitAnnotationDefault();
+        return new TraceAnnotationVisitor(super.visitAnnotationDefault(), annotationPrinter);
+    }
+
+    @Override
+    public void visitAnnotableParameterCount(final int parameterCount, final boolean visible) {
+        p.visitAnnotableParameterCount(parameterCount, visible);
+        super.visitAnnotableParameterCount(parameterCount, visible);
+    }
+
+    @Override
+    public AnnotationVisitor visitParameterAnnotation(
+            final int parameter, final String descriptor, final boolean visible) {
+        Printer annotationPrinter = p.visitParameterAnnotation(parameter, descriptor, visible);
+        return new TraceAnnotationVisitor(
+                super.visitParameterAnnotation(parameter, descriptor, visible), annotationPrinter);
+    }
+
+    @Override
+    public void visitCode() {
+        p.visitCode();
+        super.visitCode();
+    }
+
+    @Override
+    public void visitFrame(
+            final int type,
+            final int numLocal,
+            final Object[] local,
+            final int numStack,
+            final Object[] stack) {
+        p.visitFrame(type, numLocal, local, numStack, stack);
+        super.visitFrame(type, numLocal, local, numStack, stack);
+    }
+
+    @Override
+    public void visitInsn(final int opcode) {
+        p.visitInsn(opcode);
+        super.visitInsn(opcode);
+    }
+
+    @Override
+    public void visitIntInsn(final int opcode, final int operand) {
+        p.visitIntInsn(opcode, operand);
+        super.visitIntInsn(opcode, operand);
+    }
+
+    @Override
+    public void visitVarInsn(final int opcode, final int varIndex) {
+        p.visitVarInsn(opcode, varIndex);
+        super.visitVarInsn(opcode, varIndex);
+    }
+
+    @Override
+    public void visitTypeInsn(final int opcode, final String type) {
+        p.visitTypeInsn(opcode, type);
+        super.visitTypeInsn(opcode, type);
+    }
+
+    @Override
+    public void visitFieldInsn(
+            final int opcode, final String owner, final String name, final String descriptor) {
+        p.visitFieldInsn(opcode, owner, name, descriptor);
+        super.visitFieldInsn(opcode, owner, name, descriptor);
+    }
+
+    @Override
+    @SuppressWarnings("deprecation")
+    public void visitMethodInsn(
+            final int opcode,
+            final String owner,
+            final String name,
+            final String descriptor,
+            final boolean isInterface) {
+        // Call the method that p is supposed to implement, depending on its api version.
+        if (p.api < Opcodes.ASM5) {
+            if (isInterface != (opcode == Opcodes.INVOKEINTERFACE)) {
+                throw new IllegalArgumentException("INVOKESPECIAL/STATIC on interfaces require ASM5");
+            }
+            // If p is an ASMifier (resp. Textifier), or a subclass that does not override the old
+            // visitMethodInsn method, the default implementation in Printer will redirect this to the
+            // new method in ASMifier (resp. Textifier). In all other cases, p overrides the old method
+            // and this call executes it.
+            p.visitMethodInsn(opcode, owner, name, descriptor);
+        } else {
+            p.visitMethodInsn(opcode, owner, name, descriptor, isInterface);
+        }
+        if (mv != null) {
+            mv.visitMethodInsn(opcode, owner, name, descriptor, isInterface);
+        }
+    }
+
+    @Override
+    public void visitInvokeDynamicInsn(
+            final String name,
+            final String descriptor,
+            final Handle bootstrapMethodHandle,
+            final Object... bootstrapMethodArguments) {
+        p.visitInvokeDynamicInsn(name, descriptor, bootstrapMethodHandle, bootstrapMethodArguments);
+        super.visitInvokeDynamicInsn(name, descriptor, bootstrapMethodHandle, bootstrapMethodArguments);
+    }
+
+    @Override
+    public void visitJumpInsn(final int opcode, final Label label) {
+        p.visitJumpInsn(opcode, label);
+        super.visitJumpInsn(opcode, label);
+    }
+
+    @Override
+    public void visitLabel(final Label label) {
+        p.visitLabel(label);
+        super.visitLabel(label);
+    }
+
+    @Override
+    public void visitLdcInsn(final Object value) {
+        p.visitLdcInsn(value);
+        super.visitLdcInsn(value);
+    }
+
+    @Override
+    public void visitIincInsn(final int varIndex, final int increment) {
+        p.visitIincInsn(varIndex, increment);
+        super.visitIincInsn(varIndex, increment);
+    }
+
+    @Override
+    public void visitTableSwitchInsn(
+            final int min, final int max, final Label dflt, final Label... labels) {
+        p.visitTableSwitchInsn(min, max, dflt, labels);
+        super.visitTableSwitchInsn(min, max, dflt, labels);
+    }
+
+    @Override
+    public void visitLookupSwitchInsn(final Label dflt, final int[] keys, final Label[] labels) {
+        p.visitLookupSwitchInsn(dflt, keys, labels);
+        super.visitLookupSwitchInsn(dflt, keys, labels);
+    }
+
+    @Override
+    public void visitMultiANewArrayInsn(final String descriptor, final int numDimensions) {
+        p.visitMultiANewArrayInsn(descriptor, numDimensions);
+        super.visitMultiANewArrayInsn(descriptor, numDimensions);
+    }
+
+    @Override
+    public AnnotationVisitor visitInsnAnnotation(
+            final int typeRef, final TypePath typePath, final String descriptor, final boolean visible) {
+        Printer annotationPrinter = p.visitInsnAnnotation(typeRef, typePath, descriptor, visible);
+        return new TraceAnnotationVisitor(
+                super.visitInsnAnnotation(typeRef, typePath, descriptor, visible), annotationPrinter);
+    }
+
+    @Override
+    public void visitTryCatchBlock(
+            final Label start, final Label end, final Label handler, final String type) {
+        p.visitTryCatchBlock(start, end, handler, type);
+        super.visitTryCatchBlock(start, end, handler, type);
+    }
+
+    @Override
+    public AnnotationVisitor visitTryCatchAnnotation(
+            final int typeRef, final TypePath typePath, final String descriptor, final boolean visible) {
+        Printer annotationPrinter = p.visitTryCatchAnnotation(typeRef, typePath, descriptor, visible);
+        return new TraceAnnotationVisitor(
+                super.visitTryCatchAnnotation(typeRef, typePath, descriptor, visible), annotationPrinter);
+    }
+
+    @Override
+    public void visitLocalVariable(
+            final String name,
+            final String descriptor,
+            final String signature,
+            final Label start,
+            final Label end,
+            final int index) {
+        p.visitLocalVariable(name, descriptor, signature, start, end, index);
+        super.visitLocalVariable(name, descriptor, signature, start, end, index);
+    }
+
+    @Override
+    public AnnotationVisitor visitLocalVariableAnnotation(
+            final int typeRef,
+            final TypePath typePath,
+            final Label[] start,
+            final Label[] end,
+            final int[] index,
+            final String descriptor,
+            final boolean visible) {
+        Printer annotationPrinter =
+                p.visitLocalVariableAnnotation(typeRef, typePath, start, end, index, descriptor, visible);
+        return new TraceAnnotationVisitor(
+                super.visitLocalVariableAnnotation(
+                        typeRef, typePath, start, end, index, descriptor, visible),
+                annotationPrinter);
+    }
+
+    @Override
+    public void visitLineNumber(final int line, final Label start) {
+        p.visitLineNumber(line, start);
+        super.visitLineNumber(line, start);
+    }
+
+    @Override
+    public void visitMaxs(final int maxStack, final int maxLocals) {
+        p.visitMaxs(maxStack, maxLocals);
+        super.visitMaxs(maxStack, maxLocals);
+    }
+
+    @Override
+    public void visitEnd() {
+        p.visitMethodEnd();
+        super.visitEnd();
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/org/objectweb/asm/util/TraceModuleVisitor.class b/tests/test_data/std/jdk/internal/org/objectweb/asm/util/TraceModuleVisitor.class
new file mode 100644
index 0000000000000000000000000000000000000000..82957e08d62a450a65defecdb44f68468d0970b8
GIT binary patch
literal 2263
zcmb7_UsD@Z7{;GNC?R19F_l&=+N!mNO+rf5TBV{EsiIJjRBqJHY&JV|Y1oaso9I+8
z#0&L8{VvWZ%y{7k@I!Tc-m_^+0z0e244ggZyuauDcV7N^^w-}2R?x^}44Ev(4V=M*
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zwenh;gF_bdFvpA*4LpUCg6b&L(f~sd=J7OUvp8qqJf2agq_}(BR-w?7a%@<xx6-!4
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zkWeP|(PyC!qb4Vd2Cm_?$6;&*e$Q<sgpsJeD4^>G-o%YTmUaKHdM$-aInL?Z2A1SP
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/org/objectweb/asm/util/TraceModuleVisitor.java b/tests/test_data/std/jdk/internal/org/objectweb/asm/util/TraceModuleVisitor.java
new file mode 100644
index 00000000..cbd0bf7a
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/org/objectweb/asm/util/TraceModuleVisitor.java
@@ -0,0 +1,143 @@
+/*
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/*
+ * This file is available under and governed by the GNU General Public
+ * License version 2 only, as published by the Free Software Foundation.
+ * However, the following notice accompanied the original version of this
+ * file:
+ *
+ * ASM: a very small and fast Java bytecode manipulation framework
+ * Copyright (c) 2000-2011 INRIA, France Telecom
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the copyright holders nor the names of its
+ *    contributors may be used to endorse or promote products derived from
+ *    this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+package jdk.internal.org.objectweb.asm.util;
+
+import jdk.internal.org.objectweb.asm.ModuleVisitor;
+import jdk.internal.org.objectweb.asm.Opcodes;
+
+/**
+ * A {@link ModuleVisitor} that prints the fields it visits with a {@link Printer}.
+ *
+ * @author Remi Forax
+ */
+public final class TraceModuleVisitor extends ModuleVisitor {
+
+    /** The printer to convert the visited module into text. */
+    // DontCheck(MemberName): can't be renamed (for backward binary compatibility).
+    public final Printer p;
+
+    /**
+      * Constructs a new {@link TraceModuleVisitor}.
+      *
+      * @param printer the printer to convert the visited module into text.
+      */
+    public TraceModuleVisitor(final Printer printer) {
+        this(null, printer);
+    }
+
+    /**
+      * Constructs a new {@link TraceModuleVisitor}.
+      *
+      * @param moduleVisitor the module visitor to which to delegate calls. May be {@literal null}.
+      * @param printer the printer to convert the visited module into text.
+      */
+    public TraceModuleVisitor(final ModuleVisitor moduleVisitor, final Printer printer) {
+        super(/* latest api = */ Opcodes.ASM9, moduleVisitor);
+        this.p = printer;
+    }
+
+    @Override
+    public void visitMainClass(final String mainClass) {
+        p.visitMainClass(mainClass);
+        super.visitMainClass(mainClass);
+    }
+
+    @Override
+    public void visitPackage(final String packaze) {
+        p.visitPackage(packaze);
+        super.visitPackage(packaze);
+    }
+
+    @Override
+    public void visitRequire(final String module, final int access, final String version) {
+        p.visitRequire(module, access, version);
+        super.visitRequire(module, access, version);
+    }
+
+    @Override
+    public void visitExport(final String packaze, final int access, final String... modules) {
+        p.visitExport(packaze, access, modules);
+        super.visitExport(packaze, access, modules);
+    }
+
+    @Override
+    public void visitOpen(final String packaze, final int access, final String... modules) {
+        p.visitOpen(packaze, access, modules);
+        super.visitOpen(packaze, access, modules);
+    }
+
+    @Override
+    public void visitUse(final String use) {
+        p.visitUse(use);
+        super.visitUse(use);
+    }
+
+    @Override
+    public void visitProvide(final String service, final String... providers) {
+        p.visitProvide(service, providers);
+        super.visitProvide(service, providers);
+    }
+
+    @Override
+    public void visitEnd() {
+        p.visitModuleEnd();
+        super.visitEnd();
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/org/objectweb/asm/util/TraceRecordComponentVisitor.class b/tests/test_data/std/jdk/internal/org/objectweb/asm/util/TraceRecordComponentVisitor.class
new file mode 100644
index 0000000000000000000000000000000000000000..6e8aa8c0397f5c478450c4f6f9654e237f7195d7
GIT binary patch
literal 2519
zcmcIm?Q+vr5IyUUI5CO?4g_2RjYCTlIYE4sLSsl8QUakVWk~9o@=tbDN7RvwqCol4
z@&tVsm}%n~nBf6<D5mFL3p*Ht_!$0Jy1Kh(&z{}8*Dqc^eGXs=KWC9ZGJ}+XGzJ6<
zcQ^j9TrYG2&u&<LP`CW*U8fd4aH^KQy=Co$Zo^s+?3#1isrkXilE2mTJ;w_x?zS8H
zfnea0>$%~)pgy%41J)m+9OtGv+zK?y@^mGGLBYwGP`@;5{)V%i#1N3hJ{TDctCVws
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Cp{k<*

literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/org/objectweb/asm/util/TraceRecordComponentVisitor.java b/tests/test_data/std/jdk/internal/org/objectweb/asm/util/TraceRecordComponentVisitor.java
new file mode 100644
index 00000000..e40ce8c7
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/org/objectweb/asm/util/TraceRecordComponentVisitor.java
@@ -0,0 +1,128 @@
+/*
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/*
+ * This file is available under and governed by the GNU General Public
+ * License version 2 only, as published by the Free Software Foundation.
+ * However, the following notice accompanied the original version of this
+ * file:
+ *
+ * ASM: a very small and fast Java bytecode manipulation framework
+ * Copyright (c) 2000-2011 INRIA, France Telecom
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the copyright holders nor the names of its
+ *    contributors may be used to endorse or promote products derived from
+ *    this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+package jdk.internal.org.objectweb.asm.util;
+
+import jdk.internal.org.objectweb.asm.AnnotationVisitor;
+import jdk.internal.org.objectweb.asm.Attribute;
+import jdk.internal.org.objectweb.asm.Opcodes;
+import jdk.internal.org.objectweb.asm.RecordComponentVisitor;
+import jdk.internal.org.objectweb.asm.TypePath;
+
+/**
+ * A {@link RecordComponentVisitor} that prints the record components it visits with a {@link
+ * Printer}.
+ *
+ * @author Remi Forax
+ */
+public final class TraceRecordComponentVisitor extends RecordComponentVisitor {
+
+    /** The printer to convert the visited record component into text. */
+    public final Printer printer;
+
+    /**
+      * Constructs a new {@link TraceRecordComponentVisitor}.
+      *
+      * @param printer the printer to convert the visited record component into text.
+      */
+    public TraceRecordComponentVisitor(final Printer printer) {
+        this(null, printer);
+    }
+
+    /**
+      * Constructs a new {@link TraceRecordComponentVisitor}.
+      *
+      * @param recordComponentVisitor the record component visitor to which to delegate calls. May be
+      *     {@literal null}.
+      * @param printer the printer to convert the visited record component into text.
+      */
+    public TraceRecordComponentVisitor(
+            final RecordComponentVisitor recordComponentVisitor, final Printer printer) {
+        super(/* latest api ='*/ Opcodes.ASM9, recordComponentVisitor);
+        this.printer = printer;
+    }
+
+    @Override
+    public AnnotationVisitor visitAnnotation(final String descriptor, final boolean visible) {
+        Printer annotationPrinter = printer.visitRecordComponentAnnotation(descriptor, visible);
+        return new TraceAnnotationVisitor(
+                super.visitAnnotation(descriptor, visible), annotationPrinter);
+    }
+
+    @Override
+    public AnnotationVisitor visitTypeAnnotation(
+            final int typeRef, final TypePath typePath, final String descriptor, final boolean visible) {
+        Printer annotationPrinter =
+                printer.visitRecordComponentTypeAnnotation(typeRef, typePath, descriptor, visible);
+        return new TraceAnnotationVisitor(
+                super.visitTypeAnnotation(typeRef, typePath, descriptor, visible), annotationPrinter);
+    }
+
+    @Override
+    public void visitAttribute(final Attribute attribute) {
+        printer.visitRecordComponentAttribute(attribute);
+        super.visitAttribute(attribute);
+    }
+
+    @Override
+    public void visitEnd() {
+        printer.visitRecordComponentEnd();
+        super.visitEnd();
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/org/objectweb/asm/util/TraceSignatureVisitor.class b/tests/test_data/std/jdk/internal/org/objectweb/asm/util/TraceSignatureVisitor.class
new file mode 100644
index 0000000000000000000000000000000000000000..c3f20be8f62e4c9aa888be9c099135023c70f59b
GIT binary patch
literal 6072
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diff --git a/tests/test_data/std/jdk/internal/org/objectweb/asm/util/TraceSignatureVisitor.java b/tests/test_data/std/jdk/internal/org/objectweb/asm/util/TraceSignatureVisitor.java
new file mode 100644
index 00000000..ba8da75f
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/org/objectweb/asm/util/TraceSignatureVisitor.java
@@ -0,0 +1,376 @@
+/*
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/*
+ * This file is available under and governed by the GNU General Public
+ * License version 2 only, as published by the Free Software Foundation.
+ * However, the following notice accompanied the original version of this
+ * file:
+ *
+ * ASM: a very small and fast Java bytecode manipulation framework
+ * Copyright (c) 2000-2011 INRIA, France Telecom
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the copyright holders nor the names of its
+ *    contributors may be used to endorse or promote products derived from
+ *    this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+package jdk.internal.org.objectweb.asm.util;
+
+import java.util.Collections;
+import java.util.HashMap;
+import java.util.Map;
+import jdk.internal.org.objectweb.asm.Opcodes;
+import jdk.internal.org.objectweb.asm.signature.SignatureVisitor;
+
+/**
+ * A {@link SignatureVisitor} that builds the Java generic type declaration corresponding to the
+ * signature it visits.
+ *
+ * @author Eugene Kuleshov
+ * @author Eric Bruneton
+ */
+public final class TraceSignatureVisitor extends SignatureVisitor {
+
+    private static final String COMMA_SEPARATOR = ", ";
+    private static final String EXTENDS_SEPARATOR = " extends ";
+    private static final String IMPLEMENTS_SEPARATOR = " implements ";
+
+    private static final Map<Character, String> BASE_TYPES;
+
+    static {
+        HashMap<Character, String> baseTypes = new HashMap<>();
+        baseTypes.put('Z', "boolean");
+        baseTypes.put('B', "byte");
+        baseTypes.put('C', "char");
+        baseTypes.put('S', "short");
+        baseTypes.put('I', "int");
+        baseTypes.put('J', "long");
+        baseTypes.put('F', "float");
+        baseTypes.put('D', "double");
+        baseTypes.put('V', "void");
+        BASE_TYPES = Collections.unmodifiableMap(baseTypes);
+    }
+
+    /** Whether the visited signature is a class signature of a Java interface. */
+    private final boolean isInterface;
+
+    /** The Java generic type declaration corresponding to the visited signature. */
+    private final StringBuilder declaration;
+
+    /** The Java generic method return type declaration corresponding to the visited signature. */
+    private StringBuilder returnType;
+
+    /** The Java generic exception types declaration corresponding to the visited signature. */
+    private StringBuilder exceptions;
+
+    /** Whether {@link #visitFormalTypeParameter} has been called. */
+    private boolean formalTypeParameterVisited;
+
+    /** Whether {@link #visitInterfaceBound} has been called. */
+    private boolean interfaceBoundVisited;
+
+    /** Whether {@link #visitParameterType} has been called. */
+    private boolean parameterTypeVisited;
+
+    /** Whether {@link #visitInterface} has been called. */
+    private boolean interfaceVisited;
+
+    /**
+      * The stack used to keep track of class types that have arguments. Each element of this stack is
+      * a boolean encoded in one bit. The top of the stack is the least significant bit. Pushing false
+      * = *2, pushing true = *2+1, popping = /2.
+      */
+    private int argumentStack;
+
+    /**
+      * The stack used to keep track of array class types. Each element of this stack is a boolean
+      * encoded in one bit. The top of the stack is the lowest order bit. Pushing false = *2, pushing
+      * true = *2+1, popping = /2.
+      */
+    private int arrayStack;
+
+    /** The separator to append before the next visited class or inner class type. */
+    private String separator = "";
+
+    /**
+      * Constructs a new {@link TraceSignatureVisitor}.
+      *
+      * @param accessFlags for class type signatures, the access flags of the class.
+      */
+    public TraceSignatureVisitor(final int accessFlags) {
+        super(/* latest api = */ Opcodes.ASM9);
+        this.isInterface = (accessFlags & Opcodes.ACC_INTERFACE) != 0;
+        this.declaration = new StringBuilder();
+    }
+
+    private TraceSignatureVisitor(final StringBuilder stringBuilder) {
+        super(/* latest api = */ Opcodes.ASM9);
+        this.isInterface = false;
+        this.declaration = stringBuilder;
+    }
+
+    @Override
+    public void visitFormalTypeParameter(final String name) {
+        declaration.append(formalTypeParameterVisited ? COMMA_SEPARATOR : "<").append(name);
+        formalTypeParameterVisited = true;
+        interfaceBoundVisited = false;
+    }
+
+    @Override
+    public SignatureVisitor visitClassBound() {
+        separator = EXTENDS_SEPARATOR;
+        startType();
+        return this;
+    }
+
+    @Override
+    public SignatureVisitor visitInterfaceBound() {
+        separator = interfaceBoundVisited ? COMMA_SEPARATOR : EXTENDS_SEPARATOR;
+        interfaceBoundVisited = true;
+        startType();
+        return this;
+    }
+
+    @Override
+    public SignatureVisitor visitSuperclass() {
+        endFormals();
+        separator = EXTENDS_SEPARATOR;
+        startType();
+        return this;
+    }
+
+    @Override
+    public SignatureVisitor visitInterface() {
+        if (interfaceVisited) {
+            separator = COMMA_SEPARATOR;
+        } else {
+            separator = isInterface ? EXTENDS_SEPARATOR : IMPLEMENTS_SEPARATOR;
+            interfaceVisited = true;
+        }
+        startType();
+        return this;
+    }
+
+    @Override
+    public SignatureVisitor visitParameterType() {
+        endFormals();
+        if (parameterTypeVisited) {
+            declaration.append(COMMA_SEPARATOR);
+        } else {
+            declaration.append('(');
+            parameterTypeVisited = true;
+        }
+        startType();
+        return this;
+    }
+
+    @Override
+    public SignatureVisitor visitReturnType() {
+        endFormals();
+        if (parameterTypeVisited) {
+            parameterTypeVisited = false;
+        } else {
+            declaration.append('(');
+        }
+        declaration.append(')');
+        returnType = new StringBuilder();
+        return new TraceSignatureVisitor(returnType);
+    }
+
+    @Override
+    public SignatureVisitor visitExceptionType() {
+        if (exceptions == null) {
+            exceptions = new StringBuilder();
+        } else {
+            exceptions.append(COMMA_SEPARATOR);
+        }
+        return new TraceSignatureVisitor(exceptions);
+    }
+
+    @Override
+    public void visitBaseType(final char descriptor) {
+        String baseType = BASE_TYPES.get(descriptor);
+        if (baseType == null) {
+            throw new IllegalArgumentException();
+        }
+        declaration.append(baseType);
+        endType();
+    }
+
+    @Override
+    public void visitTypeVariable(final String name) {
+        declaration.append(separator).append(name);
+        separator = "";
+        endType();
+    }
+
+    @Override
+    public SignatureVisitor visitArrayType() {
+        startType();
+        arrayStack |= 1;
+        return this;
+    }
+
+    @Override
+    public void visitClassType(final String name) {
+        if ("java/lang/Object".equals(name)) {
+            // 'Map<java.lang.Object,java.util.List>' or 'abstract public V get(Object key);' should have
+            // Object 'but java.lang.String extends java.lang.Object' is unnecessary.
+            boolean needObjectClass = argumentStack % 2 != 0 || parameterTypeVisited;
+            if (needObjectClass) {
+                declaration.append(separator).append(name.replace('/', '.'));
+            }
+        } else {
+            declaration.append(separator).append(name.replace('/', '.'));
+        }
+        separator = "";
+        argumentStack *= 2;
+    }
+
+    @Override
+    public void visitInnerClassType(final String name) {
+        if (argumentStack % 2 != 0) {
+            declaration.append('>');
+        }
+        argumentStack /= 2;
+        declaration.append('.');
+        declaration.append(separator).append(name.replace('/', '.'));
+        separator = "";
+        argumentStack *= 2;
+    }
+
+    @Override
+    public void visitTypeArgument() {
+        if (argumentStack % 2 == 0) {
+            ++argumentStack;
+            declaration.append('<');
+        } else {
+            declaration.append(COMMA_SEPARATOR);
+        }
+        declaration.append('?');
+    }
+
+    @Override
+    public SignatureVisitor visitTypeArgument(final char tag) {
+        if (argumentStack % 2 == 0) {
+            ++argumentStack;
+            declaration.append('<');
+        } else {
+            declaration.append(COMMA_SEPARATOR);
+        }
+
+        if (tag == EXTENDS) {
+            declaration.append("? extends ");
+        } else if (tag == SUPER) {
+            declaration.append("? super ");
+        }
+
+        startType();
+        return this;
+    }
+
+    @Override
+    public void visitEnd() {
+        if (argumentStack % 2 != 0) {
+            declaration.append('>');
+        }
+        argumentStack /= 2;
+        endType();
+    }
+
+    // -----------------------------------------------------------------------------------------------
+
+    /**
+      * Returns the Java generic type declaration corresponding to the visited signature.
+      *
+      * @return the Java generic type declaration corresponding to the visited signature.
+      */
+    public String getDeclaration() {
+        return declaration.toString();
+    }
+
+    /**
+      * Returns the Java generic method return type declaration corresponding to the visited signature.
+      *
+      * @return the Java generic method return type declaration corresponding to the visited signature.
+      */
+    public String getReturnType() {
+        return returnType == null ? null : returnType.toString();
+    }
+
+    /**
+      * Returns the Java generic exception types declaration corresponding to the visited signature.
+      *
+      * @return the Java generic exception types declaration corresponding to the visited signature.
+      */
+    public String getExceptions() {
+        return exceptions == null ? null : exceptions.toString();
+    }
+
+    // -----------------------------------------------------------------------------------------------
+
+    private void endFormals() {
+        if (formalTypeParameterVisited) {
+            declaration.append('>');
+            formalTypeParameterVisited = false;
+        }
+    }
+
+    private void startType() {
+        arrayStack *= 2;
+    }
+
+    private void endType() {
+        if (arrayStack % 2 == 0) {
+            arrayStack /= 2;
+        } else {
+            while (arrayStack % 2 != 0) {
+                arrayStack /= 2;
+                declaration.append("[]");
+            }
+        }
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/org/xml/sax/Attributes.class b/tests/test_data/std/jdk/internal/org/xml/sax/Attributes.class
new file mode 100644
index 0000000000000000000000000000000000000000..7ff6c91823d0cd75bf69bf7df4eb32fd6d326356
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diff --git a/tests/test_data/std/jdk/internal/org/xml/sax/Attributes.java b/tests/test_data/std/jdk/internal/org/xml/sax/Attributes.java
new file mode 100644
index 00000000..5ac97818
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/org/xml/sax/Attributes.java
@@ -0,0 +1,281 @@
+/*
+ * Copyright (c) 2000, 2012, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+// Attributes.java - attribute list with Namespace support
+// http://www.saxproject.org
+// Written by David Megginson
+// NO WARRANTY!  This class is in the public domain.
+// $Id: Attributes.java,v 1.2 2004/11/03 22:44:51 jsuttor Exp $
+
+package jdk.internal.org.xml.sax;
+
+
+/**
+ * Interface for a list of XML attributes.
+ *
+ * <blockquote>
+ * <em>This module, both source code and documentation, is in the
+ * Public Domain, and comes with <strong>NO WARRANTY</strong>.</em>
+ * See <a href='http://www.saxproject.org'>http://www.saxproject.org</a>
+ * for further information.
+ * </blockquote>
+ *
+ * <p>This interface allows access to a list of attributes in
+ * three different ways:</p>
+ *
+ * <ol>
+ * <li>by attribute index;</li>
+ * <li>by Namespace-qualified name; or</li>
+ * <li>by qualified (prefixed) name.</li>
+ * </ol>
+ *
+ * <p>The list will not contain attributes that were declared
+ * #IMPLIED but not specified in the start tag.  It will also not
+ * contain attributes used as Namespace declarations (xmlns*) unless
+ * the <code>http://xml.org/sax/features/namespace-prefixes</code>
+ * feature is set to <var>true</var> (it is <var>false</var> by
+ * default).
+ * Because SAX2 conforms to the original "Namespaces in XML"
+ * recommendation, it normally does not
+ * give namespace declaration attributes a namespace URI.
+ * </p>
+ *
+ * <p>Some SAX2 parsers may support using an optional feature flag
+ * (<code>http://xml.org/sax/features/xmlns-uris</code>) to request
+ * that those attributes be given URIs, conforming to a later
+ * backwards-incompatible revision of that recommendation.  (The
+ * attribute's "local name" will be the prefix, or "xmlns" when
+ * defining a default element namespace.)  For portability, handler
+ * code should always resolve that conflict, rather than requiring
+ * parsers that can change the setting of that feature flag.  </p>
+ *
+ * <p>If the namespace-prefixes feature (see above) is
+ * <var>false</var>, access by qualified name may not be available; if
+ * the <code>http://xml.org/sax/features/namespaces</code> feature is
+ * <var>false</var>, access by Namespace-qualified names may not be
+ * available.</p>
+ *
+ * <p>This interface replaces the now-deprecated SAX1 {@link
+ * org.xml.sax.AttributeList AttributeList} interface, which does not
+ * contain Namespace support.  In addition to Namespace support, it
+ * adds the <var>getIndex</var> methods (below).</p>
+ *
+ * <p>The order of attributes in the list is unspecified, and will
+ * vary from implementation to implementation.</p>
+ *
+ * @since SAX 2.0
+ * @author David Megginson
+ * @see org.xml.sax.helpers.AttributesImpl
+ * @see org.xml.sax.ext.DeclHandler#attributeDecl
+ */
+public interface Attributes
+{
+
+
+    //------------------------------------------------------------------
+    // Indexed access.
+    //------------------------------------------------------------------
+
+
+    /**
+     * Return the number of attributes in the list.
+     *
+     * <p>Once you know the number of attributes, you can iterate
+     * through the list.</p>
+     *
+     * @return The number of attributes in the list.
+     * @see #getURI(int)
+     * @see #getLocalName(int)
+     * @see #getQName(int)
+     * @see #getType(int)
+     * @see #getValue(int)
+     */
+    public abstract int getLength ();
+
+
+    /**
+     * Look up an attribute's Namespace URI by index.
+     *
+     * @param index The attribute index (zero-based).
+     * @return The Namespace URI, or the empty string if none
+     *         is available, or null if the index is out of
+     *         range.
+     * @see #getLength
+     */
+    public abstract String getURI (int index);
+
+
+    /**
+     * Look up an attribute's local name by index.
+     *
+     * @param index The attribute index (zero-based).
+     * @return The local name, or the empty string if Namespace
+     *         processing is not being performed, or null
+     *         if the index is out of range.
+     * @see #getLength
+     */
+    public abstract String getLocalName (int index);
+
+
+    /**
+     * Look up an attribute's XML qualified (prefixed) name by index.
+     *
+     * @param index The attribute index (zero-based).
+     * @return The XML qualified name, or the empty string
+     *         if none is available, or null if the index
+     *         is out of range.
+     * @see #getLength
+     */
+    public abstract String getQName (int index);
+
+
+    /**
+     * Look up an attribute's type by index.
+     *
+     * <p>The attribute type is one of the strings "CDATA", "ID",
+     * "IDREF", "IDREFS", "NMTOKEN", "NMTOKENS", "ENTITY", "ENTITIES",
+     * or "NOTATION" (always in upper case).</p>
+     *
+     * <p>If the parser has not read a declaration for the attribute,
+     * or if the parser does not report attribute types, then it must
+     * return the value "CDATA" as stated in the XML 1.0 Recommendation
+     * (clause 3.3.3, "Attribute-Value Normalization").</p>
+     *
+     * <p>For an enumerated attribute that is not a notation, the
+     * parser will report the type as "NMTOKEN".</p>
+     *
+     * @param index The attribute index (zero-based).
+     * @return The attribute's type as a string, or null if the
+     *         index is out of range.
+     * @see #getLength
+     */
+    public abstract String getType (int index);
+
+
+    /**
+     * Look up an attribute's value by index.
+     *
+     * <p>If the attribute value is a list of tokens (IDREFS,
+     * ENTITIES, or NMTOKENS), the tokens will be concatenated
+     * into a single string with each token separated by a
+     * single space.</p>
+     *
+     * @param index The attribute index (zero-based).
+     * @return The attribute's value as a string, or null if the
+     *         index is out of range.
+     * @see #getLength
+     */
+    public abstract String getValue (int index);
+
+
+
+    //------------------------------------------------------------------
+    // Name-based query.
+    //------------------------------------------------------------------
+
+
+    /**
+     * Look up the index of an attribute by Namespace name.
+     *
+     * @param uri The Namespace URI, or the empty string if
+     *        the name has no Namespace URI.
+     * @param localName The attribute's local name.
+     * @return The index of the attribute, or -1 if it does not
+     *         appear in the list.
+     */
+    public int getIndex (String uri, String localName);
+
+
+    /**
+     * Look up the index of an attribute by XML qualified (prefixed) name.
+     *
+     * @param qName The qualified (prefixed) name.
+     * @return The index of the attribute, or -1 if it does not
+     *         appear in the list.
+     */
+    public int getIndex (String qName);
+
+
+    /**
+     * Look up an attribute's type by Namespace name.
+     *
+     * <p>See {@link #getType(int) getType(int)} for a description
+     * of the possible types.</p>
+     *
+     * @param uri The Namespace URI, or the empty String if the
+     *        name has no Namespace URI.
+     * @param localName The local name of the attribute.
+     * @return The attribute type as a string, or null if the
+     *         attribute is not in the list or if Namespace
+     *         processing is not being performed.
+     */
+    public abstract String getType (String uri, String localName);
+
+
+    /**
+     * Look up an attribute's type by XML qualified (prefixed) name.
+     *
+     * <p>See {@link #getType(int) getType(int)} for a description
+     * of the possible types.</p>
+     *
+     * @param qName The XML qualified name.
+     * @return The attribute type as a string, or null if the
+     *         attribute is not in the list or if qualified names
+     *         are not available.
+     */
+    public abstract String getType (String qName);
+
+
+    /**
+     * Look up an attribute's value by Namespace name.
+     *
+     * <p>See {@link #getValue(int) getValue(int)} for a description
+     * of the possible values.</p>
+     *
+     * @param uri The Namespace URI, or the empty String if the
+     *        name has no Namespace URI.
+     * @param localName The local name of the attribute.
+     * @return The attribute value as a string, or null if the
+     *         attribute is not in the list.
+     */
+    public abstract String getValue (String uri, String localName);
+
+
+    /**
+     * Look up an attribute's value by XML qualified (prefixed) name.
+     *
+     * <p>See {@link #getValue(int) getValue(int)} for a description
+     * of the possible values.</p>
+     *
+     * @param qName The XML qualified name.
+     * @return The attribute value as a string, or null if the
+     *         attribute is not in the list or if qualified names
+     *         are not available.
+     */
+    public abstract String getValue (String qName);
+
+}
+
+// end of Attributes.java
diff --git a/tests/test_data/std/jdk/internal/org/xml/sax/ContentHandler.class b/tests/test_data/std/jdk/internal/org/xml/sax/ContentHandler.class
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diff --git a/tests/test_data/std/jdk/internal/org/xml/sax/ContentHandler.java b/tests/test_data/std/jdk/internal/org/xml/sax/ContentHandler.java
new file mode 100644
index 00000000..d7079b6f
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/org/xml/sax/ContentHandler.java
@@ -0,0 +1,443 @@
+/*
+ * Copyright (c) 2000, 2012, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+// ContentHandler.java - handle main document content.
+// http://www.saxproject.org
+// Written by David Megginson
+// NO WARRANTY!  This class is in the public domain.
+// $Id: ContentHandler.java,v 1.2 2004/11/03 22:44:51 jsuttor Exp $
+
+package jdk.internal.org.xml.sax;
+
+
+/**
+ * Receive notification of the logical content of a document.
+ *
+ * <blockquote>
+ * <em>This module, both source code and documentation, is in the
+ * Public Domain, and comes with <strong>NO WARRANTY</strong>.</em>
+ * See <a href='http://www.saxproject.org'>http://www.saxproject.org</a>
+ * for further information.
+ * </blockquote>
+ *
+ * <p>This is the main interface that most SAX applications
+ * implement: if the application needs to be informed of basic parsing
+ * events, it implements this interface and registers an instance with
+ * the SAX parser using the {@link org.xml.sax.XMLReader#setContentHandler
+ * setContentHandler} method.  The parser uses the instance to report
+ * basic document-related events like the start and end of elements
+ * and character data.</p>
+ *
+ * <p>The order of events in this interface is very important, and
+ * mirrors the order of information in the document itself.  For
+ * example, all of an element's content (character data, processing
+ * instructions, and/or subelements) will appear, in order, between
+ * the startElement event and the corresponding endElement event.</p>
+ *
+ * <p>This interface is similar to the now-deprecated SAX 1.0
+ * DocumentHandler interface, but it adds support for Namespaces
+ * and for reporting skipped entities (in non-validating XML
+ * processors).</p>
+ *
+ * <p>Implementors should note that there is also a
+ * <code>ContentHandler</code> class in the <code>java.net</code>
+ * package; that means that it's probably a bad idea to do</p>
+ *
+ * <pre>import java.net.*;
+ * import org.xml.sax.*;
+ * </pre>
+ *
+ * <p>In fact, "import ...*" is usually a sign of sloppy programming
+ * anyway, so the user should consider this a feature rather than a
+ * bug.</p>
+ *
+ * @since SAX 2.0
+ * @author David Megginson
+ * @see org.xml.sax.XMLReader
+ * @see org.xml.sax.DTDHandler
+ * @see org.xml.sax.ErrorHandler
+ */
+public interface ContentHandler
+{
+
+    /**
+     * Receive an object for locating the origin of SAX document events.
+     *
+     * <p>SAX parsers are strongly encouraged (though not absolutely
+     * required) to supply a locator: if it does so, it must supply
+     * the locator to the application by invoking this method before
+     * invoking any of the other methods in the ContentHandler
+     * interface.</p>
+     *
+     * <p>The locator allows the application to determine the end
+     * position of any document-related event, even if the parser is
+     * not reporting an error.  Typically, the application will
+     * use this information for reporting its own errors (such as
+     * character content that does not match an application's
+     * business rules).  The information returned by the locator
+     * is probably not sufficient for use with a search engine.</p>
+     *
+     * <p>Note that the locator will return correct information only
+     * during the invocation SAX event callbacks after
+     * {@link #startDocument startDocument} returns and before
+     * {@link #endDocument endDocument} is called.  The
+     * application should not attempt to use it at any other time.</p>
+     *
+     * @param locator an object that can return the location of
+     *                any SAX document event
+     * @see org.xml.sax.Locator
+     */
+    public void setDocumentLocator (Locator locator);
+
+
+    /**
+     * Receive notification of the beginning of a document.
+     *
+     * <p>The SAX parser will invoke this method only once, before any
+     * other event callbacks (except for {@link #setDocumentLocator
+     * setDocumentLocator}).</p>
+     *
+     * @throws org.xml.sax.SAXException any SAX exception, possibly
+     *            wrapping another exception
+     * @see #endDocument
+     */
+    public void startDocument ()
+        throws SAXException;
+
+
+    /**
+     * Receive notification of the end of a document.
+     *
+     * <p><strong>There is an apparent contradiction between the
+     * documentation for this method and the documentation for {@link
+     * org.xml.sax.ErrorHandler#fatalError}.  Until this ambiguity is
+     * resolved in a future major release, clients should make no
+     * assumptions about whether endDocument() will or will not be
+     * invoked when the parser has reported a fatalError() or thrown
+     * an exception.</strong></p>
+     *
+     * <p>The SAX parser will invoke this method only once, and it will
+     * be the last method invoked during the parse.  The parser shall
+     * not invoke this method until it has either abandoned parsing
+     * (because of an unrecoverable error) or reached the end of
+     * input.</p>
+     *
+     * @throws org.xml.sax.SAXException any SAX exception, possibly
+     *            wrapping another exception
+     * @see #startDocument
+     */
+    public void endDocument()
+        throws SAXException;
+
+
+    /**
+     * Begin the scope of a prefix-URI Namespace mapping.
+     *
+     * <p>The information from this event is not necessary for
+     * normal Namespace processing: the SAX XML reader will
+     * automatically replace prefixes for element and attribute
+     * names when the <code>http://xml.org/sax/features/namespaces</code>
+     * feature is <var>true</var> (the default).</p>
+     *
+     * <p>There are cases, however, when applications need to
+     * use prefixes in character data or in attribute values,
+     * where they cannot safely be expanded automatically; the
+     * start/endPrefixMapping event supplies the information
+     * to the application to expand prefixes in those contexts
+     * itself, if necessary.</p>
+     *
+     * <p>Note that start/endPrefixMapping events are not
+     * guaranteed to be properly nested relative to each other:
+     * all startPrefixMapping events will occur immediately before the
+     * corresponding {@link #startElement startElement} event,
+     * and all {@link #endPrefixMapping endPrefixMapping}
+     * events will occur immediately after the corresponding
+     * {@link #endElement endElement} event,
+     * but their order is not otherwise
+     * guaranteed.</p>
+     *
+     * <p>There should never be start/endPrefixMapping events for the
+     * "xml" prefix, since it is predeclared and immutable.</p>
+     *
+     * @param prefix the Namespace prefix being declared.
+     *  An empty string is used for the default element namespace,
+     *  which has no prefix.
+     * @param uri the Namespace URI the prefix is mapped to
+     * @throws org.xml.sax.SAXException the client may throw
+     *            an exception during processing
+     * @see #endPrefixMapping
+     * @see #startElement
+     */
+    public void startPrefixMapping (String prefix, String uri)
+        throws SAXException;
+
+
+    /**
+     * End the scope of a prefix-URI mapping.
+     *
+     * <p>See {@link #startPrefixMapping startPrefixMapping} for
+     * details.  These events will always occur immediately after the
+     * corresponding {@link #endElement endElement} event, but the order of
+     * {@link #endPrefixMapping endPrefixMapping} events is not otherwise
+     * guaranteed.</p>
+     *
+     * @param prefix the prefix that was being mapped.
+     *  This is the empty string when a default mapping scope ends.
+     * @throws org.xml.sax.SAXException the client may throw
+     *            an exception during processing
+     * @see #startPrefixMapping
+     * @see #endElement
+     */
+    public void endPrefixMapping (String prefix)
+        throws SAXException;
+
+
+    /**
+     * Receive notification of the beginning of an element.
+     *
+     * <p>The Parser will invoke this method at the beginning of every
+     * element in the XML document; there will be a corresponding
+     * {@link #endElement endElement} event for every startElement event
+     * (even when the element is empty). All of the element's content will be
+     * reported, in order, before the corresponding endElement
+     * event.</p>
+     *
+     * <p>This event allows up to three name components for each
+     * element:</p>
+     *
+     * <ol>
+     * <li>the Namespace URI;</li>
+     * <li>the local name; and</li>
+     * <li>the qualified (prefixed) name.</li>
+     * </ol>
+     *
+     * <p>Any or all of these may be provided, depending on the
+     * values of the <var>http://xml.org/sax/features/namespaces</var>
+     * and the <var>http://xml.org/sax/features/namespace-prefixes</var>
+     * properties:</p>
+     *
+     * <ul>
+     * <li>the Namespace URI and local name are required when
+     * the namespaces property is <var>true</var> (the default), and are
+     * optional when the namespaces property is <var>false</var> (if one is
+     * specified, both must be);</li>
+     * <li>the qualified name is required when the namespace-prefixes property
+     * is <var>true</var>, and is optional when the namespace-prefixes property
+     * is <var>false</var> (the default).</li>
+     * </ul>
+     *
+     * <p>Note that the attribute list provided will contain only
+     * attributes with explicit values (specified or defaulted):
+     * #IMPLIED attributes will be omitted.  The attribute list
+     * will contain attributes used for Namespace declarations
+     * (xmlns* attributes) only if the
+     * <code>http://xml.org/sax/features/namespace-prefixes</code>
+     * property is true (it is false by default, and support for a
+     * true value is optional).</p>
+     *
+     * <p>Like {@link #characters characters()}, attribute values may have
+     * characters that need more than one <code>char</code> value.  </p>
+     *
+     * @param uri the Namespace URI, or the empty string if the
+     *        element has no Namespace URI or if Namespace
+     *        processing is not being performed
+     * @param localName the local name (without prefix), or the
+     *        empty string if Namespace processing is not being
+     *        performed
+     * @param qName the qualified name (with prefix), or the
+     *        empty string if qualified names are not available
+     * @param atts the attributes attached to the element.  If
+     *        there are no attributes, it shall be an empty
+     *        Attributes object.  The value of this object after
+     *        startElement returns is undefined
+     * @throws org.xml.sax.SAXException any SAX exception, possibly
+     *            wrapping another exception
+     * @see #endElement
+     * @see org.xml.sax.Attributes
+     * @see org.xml.sax.helpers.AttributesImpl
+     */
+    public void startElement (String uri, String localName,
+                              String qName, Attributes atts)
+        throws SAXException;
+
+
+    /**
+     * Receive notification of the end of an element.
+     *
+     * <p>The SAX parser will invoke this method at the end of every
+     * element in the XML document; there will be a corresponding
+     * {@link #startElement startElement} event for every endElement
+     * event (even when the element is empty).</p>
+     *
+     * <p>For information on the names, see startElement.</p>
+     *
+     * @param uri the Namespace URI, or the empty string if the
+     *        element has no Namespace URI or if Namespace
+     *        processing is not being performed
+     * @param localName the local name (without prefix), or the
+     *        empty string if Namespace processing is not being
+     *        performed
+     * @param qName the qualified XML name (with prefix), or the
+     *        empty string if qualified names are not available
+     * @throws org.xml.sax.SAXException any SAX exception, possibly
+     *            wrapping another exception
+     */
+    public void endElement (String uri, String localName,
+                            String qName)
+        throws SAXException;
+
+
+    /**
+     * Receive notification of character data.
+     *
+     * <p>The Parser will call this method to report each chunk of
+     * character data.  SAX parsers may return all contiguous character
+     * data in a single chunk, or they may split it into several
+     * chunks; however, all of the characters in any single event
+     * must come from the same external entity so that the Locator
+     * provides useful information.</p>
+     *
+     * <p>The application must not attempt to read from the array
+     * outside of the specified range.</p>
+     *
+     * <p>Individual characters may consist of more than one Java
+     * <code>char</code> value.  There are two important cases where this
+     * happens, because characters can't be represented in just sixteen bits.
+     * In one case, characters are represented in a <em>Surrogate Pair</em>,
+     * using two special Unicode values. Such characters are in the so-called
+     * "Astral Planes", with a code point above U+FFFF.  A second case involves
+     * composite characters, such as a base character combining with one or
+     * more accent characters. </p>
+     *
+     * <p> Your code should not assume that algorithms using
+     * <code>char</code>-at-a-time idioms will be working in character
+     * units; in some cases they will split characters.  This is relevant
+     * wherever XML permits arbitrary characters, such as attribute values,
+     * processing instruction data, and comments as well as in data reported
+     * from this method.  It's also generally relevant whenever Java code
+     * manipulates internationalized text; the issue isn't unique to XML.</p>
+     *
+     * <p>Note that some parsers will report whitespace in element
+     * content using the {@link #ignorableWhitespace ignorableWhitespace}
+     * method rather than this one (validating parsers <em>must</em>
+     * do so).</p>
+     *
+     * @param ch the characters from the XML document
+     * @param start the start position in the array
+     * @param length the number of characters to read from the array
+     * @throws org.xml.sax.SAXException any SAX exception, possibly
+     *            wrapping another exception
+     * @see #ignorableWhitespace
+     * @see org.xml.sax.Locator
+     */
+    public void characters (char ch[], int start, int length)
+        throws SAXException;
+
+
+    /**
+     * Receive notification of ignorable whitespace in element content.
+     *
+     * <p>Validating Parsers must use this method to report each chunk
+     * of whitespace in element content (see the W3C XML 1.0
+     * recommendation, section 2.10): non-validating parsers may also
+     * use this method if they are capable of parsing and using
+     * content models.</p>
+     *
+     * <p>SAX parsers may return all contiguous whitespace in a single
+     * chunk, or they may split it into several chunks; however, all of
+     * the characters in any single event must come from the same
+     * external entity, so that the Locator provides useful
+     * information.</p>
+     *
+     * <p>The application must not attempt to read from the array
+     * outside of the specified range.</p>
+     *
+     * @param ch the characters from the XML document
+     * @param start the start position in the array
+     * @param length the number of characters to read from the array
+     * @throws org.xml.sax.SAXException any SAX exception, possibly
+     *            wrapping another exception
+     * @see #characters
+     */
+    public void ignorableWhitespace (char ch[], int start, int length)
+        throws SAXException;
+
+
+    /**
+     * Receive notification of a processing instruction.
+     *
+     * <p>The Parser will invoke this method once for each processing
+     * instruction found: note that processing instructions may occur
+     * before or after the main document element.</p>
+     *
+     * <p>A SAX parser must never report an XML declaration (XML 1.0,
+     * section 2.8) or a text declaration (XML 1.0, section 4.3.1)
+     * using this method.</p>
+     *
+     * <p>Like {@link #characters characters()}, processing instruction
+     * data may have characters that need more than one <code>char</code>
+     * value. </p>
+     *
+     * @param target the processing instruction target
+     * @param data the processing instruction data, or null if
+     *        none was supplied.  The data does not include any
+     *        whitespace separating it from the target
+     * @throws org.xml.sax.SAXException any SAX exception, possibly
+     *            wrapping another exception
+     */
+    public void processingInstruction (String target, String data)
+        throws SAXException;
+
+
+    /**
+     * Receive notification of a skipped entity.
+     * This is not called for entity references within markup constructs
+     * such as element start tags or markup declarations.  (The XML
+     * recommendation requires reporting skipped external entities.
+     * SAX also reports internal entity expansion/non-expansion, except
+     * within markup constructs.)
+     *
+     * <p>The Parser will invoke this method each time the entity is
+     * skipped.  Non-validating processors may skip entities if they
+     * have not seen the declarations (because, for example, the
+     * entity was declared in an external DTD subset).  All processors
+     * may skip external entities, depending on the values of the
+     * <code>http://xml.org/sax/features/external-general-entities</code>
+     * and the
+     * <code>http://xml.org/sax/features/external-parameter-entities</code>
+     * properties.</p>
+     *
+     * @param name the name of the skipped entity.  If it is a
+     *        parameter entity, the name will begin with '%', and if
+     *        it is the external DTD subset, it will be the string
+     *        "[dtd]"
+     * @throws org.xml.sax.SAXException any SAX exception, possibly
+     *            wrapping another exception
+     */
+    public void skippedEntity (String name)
+        throws SAXException;
+}
+
+// end of ContentHandler.java
diff --git a/tests/test_data/std/jdk/internal/org/xml/sax/DTDHandler.class b/tests/test_data/std/jdk/internal/org/xml/sax/DTDHandler.class
new file mode 100644
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diff --git a/tests/test_data/std/jdk/internal/org/xml/sax/DTDHandler.java b/tests/test_data/std/jdk/internal/org/xml/sax/DTDHandler.java
new file mode 100644
index 00000000..3c2a5e93
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/org/xml/sax/DTDHandler.java
@@ -0,0 +1,173 @@
+/*
+ * Copyright (c) 2000, 2018, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+// SAX DTD handler.
+// http://www.saxproject.org
+// No warranty; no copyright -- use this as you will.
+// $Id: DTDHandler.java,v 1.2 2004/11/03 22:44:51 jsuttor Exp $
+
+package jdk.internal.org.xml.sax;
+
+/**
+ * Receive notification of basic DTD-related events.
+ *
+ * <blockquote>
+ * <em>This module, both source code and documentation, is in the
+ * Public Domain, and comes with <strong>NO WARRANTY</strong>.</em>
+ * See <a href='http://www.saxproject.org'>http://www.saxproject.org</a>
+ * for further information.
+ * </blockquote>
+ *
+ * <p>If a SAX application needs information about notations and
+ * unparsed entities, then the application implements this
+ * interface and registers an instance with the SAX parser using
+ * the parser's setDTDHandler method.  The parser uses the
+ * instance to report notation and unparsed entity declarations to
+ * the application.</p>
+ *
+ * <p>Note that this interface includes only those DTD events that
+ * the XML recommendation <em>requires</em> processors to report:
+ * notation and unparsed entity declarations.</p>
+ *
+ * <p>The SAX parser may report these events in any order, regardless
+ * of the order in which the notations and unparsed entities were
+ * declared; however, all DTD events must be reported after the
+ * document handler's startDocument event, and before the first
+ * startElement event.
+ * (If the {@link org.xml.sax.ext.LexicalHandler LexicalHandler} is
+ * used, these events must also be reported before the endDTD event.)
+ * </p>
+ *
+ * <p>It is up to the application to store the information for
+ * future use (perhaps in a hash table or object tree).
+ * If the application encounters attributes of type "NOTATION",
+ * "ENTITY", or "ENTITIES", it can use the information that it
+ * obtained through this interface to find the entity and/or
+ * notation corresponding with the attribute value.</p>
+ *
+ * @since SAX 1.0
+ * @author David Megginson
+ * @see org.xml.sax.XMLReader#setDTDHandler
+ */
+public interface DTDHandler {
+
+    /**
+     * Receive notification of a notation declaration event.
+     *
+     * <p>It is up to the application to record the notation for later
+     * reference, if necessary;
+     * notations may appear as attribute values and in unparsed entity
+     * declarations, and are sometime used with processing instruction
+     * target names.</p>
+     *
+     * <p>At least one of publicId and systemId must be non-null.
+     * If a system identifier is present, and it is a URL, the SAX
+     * parser must resolve it fully before passing it to the
+     * application through this event.</p>
+     *
+     * <p>There is no guarantee that the notation declaration will be
+     * reported before any unparsed entities that use it.</p>
+     *
+     * @param name The notation name.
+     * @param publicId The notation's public identifier, or null if
+     *        none was given.
+     * @param systemId The notation's system identifier, or null if
+     *        none was given.
+     * @exception org.xml.sax.SAXException Any SAX exception, possibly
+     *            wrapping another exception.
+     * @see #unparsedEntityDecl
+     * @see org.xml.sax.Attributes
+     */
+    public abstract void notationDecl (String name,
+                                       String publicId,
+                                       String systemId)
+        throws SAXException;
+
+
+    /**
+     * Receive notification of an unparsed entity declaration event.
+     *
+     * <p>Note that the notation name corresponds to a notation
+     * reported by the {@link #notationDecl notationDecl} event.
+     * It is up to the application to record the entity for later
+     * reference, if necessary;
+     * unparsed entities may appear as attribute values.
+     * </p>
+     *
+     * <p>If the system identifier is a URL, the parser must resolve it
+     * fully before passing it to the application.</p>
+     *
+     * @exception org.xml.sax.SAXException Any SAX exception, possibly
+     *            wrapping another exception.
+     * @param name The unparsed entity's name.
+     * @param publicId The entity's public identifier, or null if none
+     *        was given.
+     * @param systemId The entity's system identifier.
+     * @param notationName The name of the associated notation.
+     * @see #notationDecl
+     * @see org.xml.sax.Attributes
+     */
+    public abstract void unparsedEntityDecl (String name,
+                                             String publicId,
+                                             String systemId,
+                                             String notationName)
+        throws SAXException;
+
+    // from SAX2 extension DeclHandler
+    /**
+     * Receive notification of the start of DTD declarations.
+     *
+     * The start/endDTD events appear within the start/endDocument events
+     * from ContentHandler.
+     *
+     * @param name The document type name.
+     * @param publicId The declared public identifier for the
+     *        external DTD subset, or null if none was declared.
+     * @param systemId The declared system identifier for the
+     *        external DTD subset, or null if none was declared.
+     *        (Note that this is not resolved against the document
+     *        base URI.)
+     * @throws SAXException the event receiver may throw an exception during processing
+     */
+    default public void startDTD (String name, String publicId, String systemId)
+        throws SAXException
+    {
+        // no op
+    }
+
+    // Custom API for the Properties
+
+    /**
+     * Receive notification of the start of DTD internal subset.
+     *
+     * @throws SAXException the event receiver may throw an exception during processing
+     */
+    default public void startInternalSub () throws SAXException
+    {
+        // no op
+    }
+}
+
+// end of DTDHandler.java
diff --git a/tests/test_data/std/jdk/internal/org/xml/sax/EntityResolver.class b/tests/test_data/std/jdk/internal/org/xml/sax/EntityResolver.class
new file mode 100644
index 0000000000000000000000000000000000000000..6d98d4b6acc6b3047c3bcd9e391d1accc0cab02d
GIT binary patch
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literal 0
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diff --git a/tests/test_data/std/jdk/internal/org/xml/sax/EntityResolver.java b/tests/test_data/std/jdk/internal/org/xml/sax/EntityResolver.java
new file mode 100644
index 00000000..81cae705
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/org/xml/sax/EntityResolver.java
@@ -0,0 +1,143 @@
+/*
+ * Copyright (c) 2000, 2013, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+// SAX entity resolver.
+// http://www.saxproject.org
+// No warranty; no copyright -- use this as you will.
+// $Id: EntityResolver.java,v 1.2 2004/11/03 22:44:52 jsuttor Exp $
+
+package jdk.internal.org.xml.sax;
+
+import java.io.IOException;
+
+
+/**
+ * Basic interface for resolving entities.
+ *
+ * <blockquote>
+ * <em>This module, both source code and documentation, is in the
+ * Public Domain, and comes with <strong>NO WARRANTY</strong>.</em>
+ * See <a href='http://www.saxproject.org'>http://www.saxproject.org</a>
+ * for further information.
+ * </blockquote>
+ *
+ * <p>If a SAX application needs to implement customized handling
+ * for external entities, it must implement this interface and
+ * register an instance with the SAX driver using the
+ * {@link org.xml.sax.XMLReader#setEntityResolver setEntityResolver}
+ * method.</p>
+ *
+ * <p>The XML reader will then allow the application to intercept any
+ * external entities (including the external DTD subset and external
+ * parameter entities, if any) before including them.</p>
+ *
+ * <p>Many SAX applications will not need to implement this interface,
+ * but it will be especially useful for applications that build
+ * XML documents from databases or other specialized input sources,
+ * or for applications that use URI types other than URLs.</p>
+ *
+ * <p>The following resolver would provide the application
+ * with a special character stream for the entity with the system
+ * identifier "http://www.myhost.com/today":</p>
+ *
+ * <pre>
+ * import org.xml.sax.EntityResolver;
+ * import org.xml.sax.InputSource;
+ *
+ * public class MyResolver implements EntityResolver {
+ *   public InputSource resolveEntity (String publicId, String systemId)
+ *   {
+ *     if (systemId.equals("http://www.myhost.com/today")) {
+ *              // return a special input source
+ *       MyReader reader = new MyReader();
+ *       return new InputSource(reader);
+ *     } else {
+ *              // use the default behaviour
+ *       return null;
+ *     }
+ *   }
+ * }
+ * </pre>
+ *
+ * <p>The application can also use this interface to redirect system
+ * identifiers to local URIs or to look up replacements in a catalog
+ * (possibly by using the public identifier).</p>
+ *
+ * @since SAX 1.0
+ * @author David Megginson
+ * @see org.xml.sax.XMLReader#setEntityResolver
+ * @see org.xml.sax.InputSource
+ */
+public interface EntityResolver {
+
+
+    /**
+     * Allow the application to resolve external entities.
+     *
+     * <p>The parser will call this method before opening any external
+     * entity except the top-level document entity.  Such entities include
+     * the external DTD subset and external parameter entities referenced
+     * within the DTD (in either case, only if the parser reads external
+     * parameter entities), and external general entities referenced
+     * within the document element (if the parser reads external general
+     * entities).  The application may request that the parser locate
+     * the entity itself, that it use an alternative URI, or that it
+     * use data provided by the application (as a character or byte
+     * input stream).</p>
+     *
+     * <p>Application writers can use this method to redirect external
+     * system identifiers to secure and/or local URIs, to look up
+     * public identifiers in a catalogue, or to read an entity from a
+     * database or other input source (including, for example, a dialog
+     * box).  Neither XML nor SAX specifies a preferred policy for using
+     * public or system IDs to resolve resources.  However, SAX specifies
+     * how to interpret any InputSource returned by this method, and that
+     * if none is returned, then the system ID will be dereferenced as
+     * a URL.  </p>
+     *
+     * <p>If the system identifier is a URL, the SAX parser must
+     * resolve it fully before reporting it to the application.</p>
+     *
+     * @param publicId The public identifier of the external entity
+     *        being referenced, or null if none was supplied.
+     * @param systemId The system identifier of the external entity
+     *        being referenced.
+     * @return An InputSource object describing the new input source,
+     *         or null to request that the parser open a regular
+     *         URI connection to the system identifier.
+     * @exception org.xml.sax.SAXException Any SAX exception, possibly
+     *            wrapping another exception.
+     * @exception java.io.IOException A Java-specific IO exception,
+     *            possibly the result of creating a new InputStream
+     *            or Reader for the InputSource.
+     * @see org.xml.sax.InputSource
+     */
+    public abstract InputSource resolveEntity (String publicId,
+                                               String systemId)
+        throws SAXException, IOException;
+
+}
+
+// end of EntityResolver.java
diff --git a/tests/test_data/std/jdk/internal/org/xml/sax/ErrorHandler.class b/tests/test_data/std/jdk/internal/org/xml/sax/ErrorHandler.class
new file mode 100644
index 0000000000000000000000000000000000000000..4369d6259910744d33d263327093d58464b4a3dc
GIT binary patch
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diff --git a/tests/test_data/std/jdk/internal/org/xml/sax/ErrorHandler.java b/tests/test_data/std/jdk/internal/org/xml/sax/ErrorHandler.java
new file mode 100644
index 00000000..3df1021e
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/org/xml/sax/ErrorHandler.java
@@ -0,0 +1,163 @@
+/*
+ * Copyright (c) 2000, 2012, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+// SAX error handler.
+// http://www.saxproject.org
+// No warranty; no copyright -- use this as you will.
+// $Id: ErrorHandler.java,v 1.2 2004/11/03 22:44:52 jsuttor Exp $
+
+package jdk.internal.org.xml.sax;
+
+
+/**
+ * Basic interface for SAX error handlers.
+ *
+ * <blockquote>
+ * <em>This module, both source code and documentation, is in the
+ * Public Domain, and comes with <strong>NO WARRANTY</strong>.</em>
+ * See <a href='http://www.saxproject.org'>http://www.saxproject.org</a>
+ * for further information.
+ * </blockquote>
+ *
+ * <p>If a SAX application needs to implement customized error
+ * handling, it must implement this interface and then register an
+ * instance with the XML reader using the
+ * {@link org.xml.sax.XMLReader#setErrorHandler setErrorHandler}
+ * method.  The parser will then report all errors and warnings
+ * through this interface.</p>
+ *
+ * <p><strong>WARNING:</strong> If an application does <em>not</em>
+ * register an ErrorHandler, XML parsing errors will go unreported,
+ * except that <em>SAXParseException</em>s will be thrown for fatal errors.
+ * In order to detect validity errors, an ErrorHandler that does something
+ * with {@link #error error()} calls must be registered.</p>
+ *
+ * <p>For XML processing errors, a SAX driver must use this interface
+ * in preference to throwing an exception: it is up to the application
+ * to decide whether to throw an exception for different types of
+ * errors and warnings.  Note, however, that there is no requirement that
+ * the parser continue to report additional errors after a call to
+ * {@link #fatalError fatalError}.  In other words, a SAX driver class
+ * may throw an exception after reporting any fatalError.
+ * Also parsers may throw appropriate exceptions for non-XML errors.
+ * For example, {@link XMLReader#parse XMLReader.parse()} would throw
+ * an IOException for errors accessing entities or the document.</p>
+ *
+ * @since SAX 1.0
+ * @author David Megginson
+ * @see org.xml.sax.XMLReader#setErrorHandler
+ * @see org.xml.sax.SAXParseException
+ */
+public interface ErrorHandler {
+
+
+    /**
+     * Receive notification of a warning.
+     *
+     * <p>SAX parsers will use this method to report conditions that
+     * are not errors or fatal errors as defined by the XML
+     * recommendation.  The default behaviour is to take no
+     * action.</p>
+     *
+     * <p>The SAX parser must continue to provide normal parsing events
+     * after invoking this method: it should still be possible for the
+     * application to process the document through to the end.</p>
+     *
+     * <p>Filters may use this method to report other, non-XML warnings
+     * as well.</p>
+     *
+     * @param exception The warning information encapsulated in a
+     *                  SAX parse exception.
+     * @exception org.xml.sax.SAXException Any SAX exception, possibly
+     *            wrapping another exception.
+     * @see org.xml.sax.SAXParseException
+     */
+    public abstract void warning (SAXParseException exception)
+        throws SAXException;
+
+
+    /**
+     * Receive notification of a recoverable error.
+     *
+     * <p>This corresponds to the definition of "error" in section 1.2
+     * of the W3C XML 1.0 Recommendation.  For example, a validating
+     * parser would use this callback to report the violation of a
+     * validity constraint.  The default behaviour is to take no
+     * action.</p>
+     *
+     * <p>The SAX parser must continue to provide normal parsing
+     * events after invoking this method: it should still be possible
+     * for the application to process the document through to the end.
+     * If the application cannot do so, then the parser should report
+     * a fatal error even if the XML recommendation does not require
+     * it to do so.</p>
+     *
+     * <p>Filters may use this method to report other, non-XML errors
+     * as well.</p>
+     *
+     * @param exception The error information encapsulated in a
+     *                  SAX parse exception.
+     * @exception org.xml.sax.SAXException Any SAX exception, possibly
+     *            wrapping another exception.
+     * @see org.xml.sax.SAXParseException
+     */
+    public abstract void error (SAXParseException exception)
+        throws SAXException;
+
+
+    /**
+     * Receive notification of a non-recoverable error.
+     *
+     * <p><strong>There is an apparent contradiction between the
+     * documentation for this method and the documentation for {@link
+     * org.xml.sax.ContentHandler#endDocument}.  Until this ambiguity
+     * is resolved in a future major release, clients should make no
+     * assumptions about whether endDocument() will or will not be
+     * invoked when the parser has reported a fatalError() or thrown
+     * an exception.</strong></p>
+     *
+     * <p>This corresponds to the definition of "fatal error" in
+     * section 1.2 of the W3C XML 1.0 Recommendation.  For example, a
+     * parser would use this callback to report the violation of a
+     * well-formedness constraint.</p>
+     *
+     * <p>The application must assume that the document is unusable
+     * after the parser has invoked this method, and should continue
+     * (if at all) only for the sake of collecting additional error
+     * messages: in fact, SAX parsers are free to stop reporting any
+     * other events once this method has been invoked.</p>
+     *
+     * @param exception The error information encapsulated in a
+     *                  SAX parse exception.
+     * @exception org.xml.sax.SAXException Any SAX exception, possibly
+     *            wrapping another exception.
+     * @see org.xml.sax.SAXParseException
+     */
+    public abstract void fatalError (SAXParseException exception)
+        throws SAXException;
+
+}
+
+// end of ErrorHandler.java
diff --git a/tests/test_data/std/jdk/internal/org/xml/sax/InputSource.class b/tests/test_data/std/jdk/internal/org/xml/sax/InputSource.class
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/org/xml/sax/InputSource.java b/tests/test_data/std/jdk/internal/org/xml/sax/InputSource.java
new file mode 100644
index 00000000..89b66470
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/org/xml/sax/InputSource.java
@@ -0,0 +1,363 @@
+/*
+ * Copyright (c) 2000, 2012, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+// SAX input source.
+// http://www.saxproject.org
+// No warranty; no copyright -- use this as you will.
+// $Id: InputSource.java,v 1.2 2004/11/03 22:55:32 jsuttor Exp $
+
+package jdk.internal.org.xml.sax;
+
+import java.io.Reader;
+import java.io.InputStream;
+
+/**
+ * A single input source for an XML entity.
+ *
+ * <blockquote>
+ * <em>This module, both source code and documentation, is in the
+ * Public Domain, and comes with <strong>NO WARRANTY</strong>.</em>
+ * See <a href='http://www.saxproject.org'>http://www.saxproject.org</a>
+ * for further information.
+ * </blockquote>
+ *
+ * <p>This class allows a SAX application to encapsulate information
+ * about an input source in a single object, which may include
+ * a public identifier, a system identifier, a byte stream (possibly
+ * with a specified encoding), and/or a character stream.</p>
+ *
+ * <p>There are two places that the application can deliver an
+ * input source to the parser: as the argument to the Parser.parse
+ * method, or as the return value of the EntityResolver.resolveEntity
+ * method.</p>
+ *
+ * <p>The SAX parser will use the InputSource object to determine how
+ * to read XML input.  If there is a character stream available, the
+ * parser will read that stream directly, disregarding any text
+ * encoding declaration found in that stream.
+ * If there is no character stream, but there is
+ * a byte stream, the parser will use that byte stream, using the
+ * encoding specified in the InputSource or else (if no encoding is
+ * specified) autodetecting the character encoding using an algorithm
+ * such as the one in the XML specification.  If neither a character
+ * stream nor a
+ * byte stream is available, the parser will attempt to open a URI
+ * connection to the resource identified by the system
+ * identifier.</p>
+ *
+ * <p>An InputSource object belongs to the application: the SAX parser
+ * shall never modify it in any way (it may modify a copy if
+ * necessary).  However, standard processing of both byte and
+ * character streams is to close them on as part of end-of-parse cleanup,
+ * so applications should not attempt to re-use such streams after they
+ * have been handed to a parser.  </p>
+ *
+ * @since SAX 1.0
+ * @author David Megginson
+ * @see org.xml.sax.XMLReader#parse(org.xml.sax.InputSource)
+ * @see org.xml.sax.EntityResolver#resolveEntity
+ * @see java.io.InputStream
+ * @see java.io.Reader
+ */
+public class InputSource {
+
+    /**
+     * Zero-argument default constructor.
+     *
+     * @see #setPublicId
+     * @see #setSystemId
+     * @see #setByteStream
+     * @see #setCharacterStream
+     * @see #setEncoding
+     */
+    public InputSource ()
+    {
+    }
+
+
+    /**
+     * Create a new input source with a system identifier.
+     *
+     * <p>Applications may use setPublicId to include a
+     * public identifier as well, or setEncoding to specify
+     * the character encoding, if known.</p>
+     *
+     * <p>If the system identifier is a URL, it must be fully
+     * resolved (it may not be a relative URL).</p>
+     *
+     * @param systemId The system identifier (URI).
+     * @see #setPublicId
+     * @see #setSystemId
+     * @see #setByteStream
+     * @see #setEncoding
+     * @see #setCharacterStream
+     */
+    @SuppressWarnings("this-escape")
+    public InputSource (String systemId)
+    {
+        setSystemId(systemId);
+    }
+
+
+    /**
+     * Create a new input source with a byte stream.
+     *
+     * <p>Application writers should use setSystemId() to provide a base
+     * for resolving relative URIs, may use setPublicId to include a
+     * public identifier, and may use setEncoding to specify the object's
+     * character encoding.</p>
+     *
+     * @param byteStream The raw byte stream containing the document.
+     * @see #setPublicId
+     * @see #setSystemId
+     * @see #setEncoding
+     * @see #setByteStream
+     * @see #setCharacterStream
+     */
+    @SuppressWarnings("this-escape")
+    public InputSource (InputStream byteStream)
+    {
+        setByteStream(byteStream);
+    }
+
+
+    /**
+     * Create a new input source with a character stream.
+     *
+     * <p>Application writers should use setSystemId() to provide a base
+     * for resolving relative URIs, and may use setPublicId to include a
+     * public identifier.</p>
+     *
+     * <p>The character stream shall not include a byte order mark.</p>
+     *
+     * @see #setPublicId
+     * @see #setSystemId
+     * @see #setByteStream
+     * @see #setCharacterStream
+     */
+    @SuppressWarnings("this-escape")
+    public InputSource (Reader characterStream)
+    {
+        setCharacterStream(characterStream);
+    }
+
+
+    /**
+     * Set the public identifier for this input source.
+     *
+     * <p>The public identifier is always optional: if the application
+     * writer includes one, it will be provided as part of the
+     * location information.</p>
+     *
+     * @param publicId The public identifier as a string.
+     * @see #getPublicId
+     * @see org.xml.sax.Locator#getPublicId
+     * @see org.xml.sax.SAXParseException#getPublicId
+     */
+    public void setPublicId (String publicId)
+    {
+        this.publicId = publicId;
+    }
+
+
+    /**
+     * Get the public identifier for this input source.
+     *
+     * @return The public identifier, or null if none was supplied.
+     * @see #setPublicId
+     */
+    public String getPublicId ()
+    {
+        return publicId;
+    }
+
+
+    /**
+     * Set the system identifier for this input source.
+     *
+     * <p>The system identifier is optional if there is a byte stream
+     * or a character stream, but it is still useful to provide one,
+     * since the application can use it to resolve relative URIs
+     * and can include it in error messages and warnings (the parser
+     * will attempt to open a connection to the URI only if
+     * there is no byte stream or character stream specified).</p>
+     *
+     * <p>If the application knows the character encoding of the
+     * object pointed to by the system identifier, it can register
+     * the encoding using the setEncoding method.</p>
+     *
+     * <p>If the system identifier is a URL, it must be fully
+     * resolved (it may not be a relative URL).</p>
+     *
+     * @param systemId The system identifier as a string.
+     * @see #setEncoding
+     * @see #getSystemId
+     * @see org.xml.sax.Locator#getSystemId
+     * @see org.xml.sax.SAXParseException#getSystemId
+     */
+    public void setSystemId (String systemId)
+    {
+        this.systemId = systemId;
+    }
+
+
+    /**
+     * Get the system identifier for this input source.
+     *
+     * <p>The getEncoding method will return the character encoding
+     * of the object pointed to, or null if unknown.</p>
+     *
+     * <p>If the system ID is a URL, it will be fully resolved.</p>
+     *
+     * @return The system identifier, or null if none was supplied.
+     * @see #setSystemId
+     * @see #getEncoding
+     */
+    public String getSystemId ()
+    {
+        return systemId;
+    }
+
+
+    /**
+     * Set the byte stream for this input source.
+     *
+     * <p>The SAX parser will ignore this if there is also a character
+     * stream specified, but it will use a byte stream in preference
+     * to opening a URI connection itself.</p>
+     *
+     * <p>If the application knows the character encoding of the
+     * byte stream, it should set it with the setEncoding method.</p>
+     *
+     * @param byteStream A byte stream containing an XML document or
+     *        other entity.
+     * @see #setEncoding
+     * @see #getByteStream
+     * @see #getEncoding
+     * @see java.io.InputStream
+     */
+    public void setByteStream (InputStream byteStream)
+    {
+        this.byteStream = byteStream;
+    }
+
+
+    /**
+     * Get the byte stream for this input source.
+     *
+     * <p>The getEncoding method will return the character
+     * encoding for this byte stream, or null if unknown.</p>
+     *
+     * @return The byte stream, or null if none was supplied.
+     * @see #getEncoding
+     * @see #setByteStream
+     */
+    public InputStream getByteStream ()
+    {
+        return byteStream;
+    }
+
+
+    /**
+     * Set the character encoding, if known.
+     *
+     * <p>The encoding must be a string acceptable for an
+     * XML encoding declaration (see section 4.3.3 of the XML 1.0
+     * recommendation).</p>
+     *
+     * <p>This method has no effect when the application provides a
+     * character stream.</p>
+     *
+     * @param encoding A string describing the character encoding.
+     * @see #setSystemId
+     * @see #setByteStream
+     * @see #getEncoding
+     */
+    public void setEncoding (String encoding)
+    {
+        this.encoding = encoding;
+    }
+
+
+    /**
+     * Get the character encoding for a byte stream or URI.
+     * This value will be ignored when the application provides a
+     * character stream.
+     *
+     * @return The encoding, or null if none was supplied.
+     * @see #setByteStream
+     * @see #getSystemId
+     * @see #getByteStream
+     */
+    public String getEncoding ()
+    {
+        return encoding;
+    }
+
+
+    /**
+     * Set the character stream for this input source.
+     *
+     * <p>If there is a character stream specified, the SAX parser
+     * will ignore any byte stream and will not attempt to open
+     * a URI connection to the system identifier.</p>
+     *
+     * @param characterStream The character stream containing the
+     *        XML document or other entity.
+     * @see #getCharacterStream
+     * @see java.io.Reader
+     */
+    public void setCharacterStream (Reader characterStream)
+    {
+        this.characterStream = characterStream;
+    }
+
+
+    /**
+     * Get the character stream for this input source.
+     *
+     * @return The character stream, or null if none was supplied.
+     * @see #setCharacterStream
+     */
+    public Reader getCharacterStream ()
+    {
+        return characterStream;
+    }
+
+
+
+    //------------------------------------------------------------------
+    // Internal state.
+    //------------------------------------------------------------------
+
+    private String publicId;
+    private String systemId;
+    private InputStream byteStream;
+    private String encoding;
+    private Reader characterStream;
+
+}
+
+// end of InputSource.java
diff --git a/tests/test_data/std/jdk/internal/org/xml/sax/Locator.class b/tests/test_data/std/jdk/internal/org/xml/sax/Locator.class
new file mode 100644
index 0000000000000000000000000000000000000000..bf66471dc667ce0cd798cd0f66b566b9d8af91fe
GIT binary patch
literal 243
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z@E*_G9l!?T04>72$WBaZC#>d*8Jn|9saVA?EHWu~#s=sRrUgH9rnt`8At^-a2*X^s
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oRw_XleS55$_dSA-`T9V|*Xp9@7eesWJ_heQY}AuOKU)~R00yu-5C8xG

literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/org/xml/sax/Locator.java b/tests/test_data/std/jdk/internal/org/xml/sax/Locator.java
new file mode 100644
index 00000000..d5682f6c
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/org/xml/sax/Locator.java
@@ -0,0 +1,160 @@
+/*
+ * Copyright (c) 2000, 2012, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+// SAX locator interface for document events.
+// http://www.saxproject.org
+// No warranty; no copyright -- use this as you will.
+// $Id: Locator.java,v 1.2 2004/11/03 22:55:32 jsuttor Exp $
+
+package jdk.internal.org.xml.sax;
+
+
+/**
+ * Interface for associating a SAX event with a document location.
+ *
+ * <blockquote>
+ * <em>This module, both source code and documentation, is in the
+ * Public Domain, and comes with <strong>NO WARRANTY</strong>.</em>
+ * See <a href='http://www.saxproject.org'>http://www.saxproject.org</a>
+ * for further information.
+ * </blockquote>
+ *
+ * <p>If a SAX parser provides location information to the SAX
+ * application, it does so by implementing this interface and then
+ * passing an instance to the application using the content
+ * handler's {@link org.xml.sax.ContentHandler#setDocumentLocator
+ * setDocumentLocator} method.  The application can use the
+ * object to obtain the location of any other SAX event
+ * in the XML source document.</p>
+ *
+ * <p>Note that the results returned by the object will be valid only
+ * during the scope of each callback method: the application
+ * will receive unpredictable results if it attempts to use the
+ * locator at any other time, or after parsing completes.</p>
+ *
+ * <p>SAX parsers are not required to supply a locator, but they are
+ * very strongly encouraged to do so.  If the parser supplies a
+ * locator, it must do so before reporting any other document events.
+ * If no locator has been set by the time the application receives
+ * the {@link org.xml.sax.ContentHandler#startDocument startDocument}
+ * event, the application should assume that a locator is not
+ * available.</p>
+ *
+ * @since SAX 1.0
+ * @author David Megginson
+ * @see org.xml.sax.ContentHandler#setDocumentLocator
+ */
+public interface Locator {
+
+
+    /**
+     * Return the public identifier for the current document event.
+     *
+     * <p>The return value is the public identifier of the document
+     * entity or of the external parsed entity in which the markup
+     * triggering the event appears.</p>
+     *
+     * @return A string containing the public identifier, or
+     *         null if none is available.
+     * @see #getSystemId
+     */
+    public abstract String getPublicId ();
+
+
+    /**
+     * Return the system identifier for the current document event.
+     *
+     * <p>The return value is the system identifier of the document
+     * entity or of the external parsed entity in which the markup
+     * triggering the event appears.</p>
+     *
+     * <p>If the system identifier is a URL, the parser must resolve it
+     * fully before passing it to the application.  For example, a file
+     * name must always be provided as a <em>file:...</em> URL, and other
+     * kinds of relative URI are also resolved against their bases.</p>
+     *
+     * @return A string containing the system identifier, or null
+     *         if none is available.
+     * @see #getPublicId
+     */
+    public abstract String getSystemId ();
+
+
+    /**
+     * Return the line number where the current document event ends.
+     * Lines are delimited by line ends, which are defined in
+     * the XML specification.
+     *
+     * <p><strong>Warning:</strong> The return value from the method
+     * is intended only as an approximation for the sake of diagnostics;
+     * it is not intended to provide sufficient information
+     * to edit the character content of the original XML document.
+     * In some cases, these "line" numbers match what would be displayed
+     * as columns, and in others they may not match the source text
+     * due to internal entity expansion.  </p>
+     *
+     * <p>The return value is an approximation of the line number
+     * in the document entity or external parsed entity where the
+     * markup triggering the event appears.</p>
+     *
+     * <p>If possible, the SAX driver should provide the line position
+     * of the first character after the text associated with the document
+     * event.  The first line is line 1.</p>
+     *
+     * @return The line number, or -1 if none is available.
+     * @see #getColumnNumber
+     */
+    public abstract int getLineNumber ();
+
+
+    /**
+     * Return the column number where the current document event ends.
+     * This is one-based number of Java <code>char</code> values since
+     * the last line end.
+     *
+     * <p><strong>Warning:</strong> The return value from the method
+     * is intended only as an approximation for the sake of diagnostics;
+     * it is not intended to provide sufficient information
+     * to edit the character content of the original XML document.
+     * For example, when lines contain combining character sequences, wide
+     * characters, surrogate pairs, or bi-directional text, the value may
+     * not correspond to the column in a text editor's display. </p>
+     *
+     * <p>The return value is an approximation of the column number
+     * in the document entity or external parsed entity where the
+     * markup triggering the event appears.</p>
+     *
+     * <p>If possible, the SAX driver should provide the line position
+     * of the first character after the text associated with the document
+     * event.  The first column in each line is column 1.</p>
+     *
+     * @return The column number, or -1 if none is available.
+     * @see #getLineNumber
+     */
+    public abstract int getColumnNumber ();
+
+}
+
+// end of Locator.java
diff --git a/tests/test_data/std/jdk/internal/org/xml/sax/SAXException.class b/tests/test_data/std/jdk/internal/org/xml/sax/SAXException.class
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diff --git a/tests/test_data/std/jdk/internal/org/xml/sax/SAXException.java b/tests/test_data/std/jdk/internal/org/xml/sax/SAXException.java
new file mode 100644
index 00000000..ef98d4d5
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/org/xml/sax/SAXException.java
@@ -0,0 +1,243 @@
+/*
+ * Copyright (c) 2000, 2019, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+// SAX exception class.
+// http://www.saxproject.org
+// No warranty; no copyright -- use this as you will.
+// $Id: SAXException.java,v 1.3 2004/11/03 22:55:32 jsuttor Exp $
+
+package jdk.internal.org.xml.sax;
+
+import java.io.IOException;
+import java.io.InvalidClassException;
+import java.io.ObjectInputStream;
+import java.io.ObjectOutputStream;
+import java.io.ObjectStreamField;
+
+/**
+ * Encapsulate a general SAX error or warning.
+ *
+ * <blockquote>
+ * <em>This module, both source code and documentation, is in the
+ * Public Domain, and comes with <strong>NO WARRANTY</strong>.</em>
+ * See <a href='http://www.saxproject.org'>http://www.saxproject.org</a>
+ * for further information.
+ * </blockquote>
+ *
+ * <p>This class can contain basic error or warning information from
+ * either the XML parser or the application: a parser writer or
+ * application writer can subclass it to provide additional
+ * functionality.  SAX handlers may throw this exception or
+ * any exception subclassed from it.</p>
+ *
+ * <p>If the application needs to pass through other types of
+ * exceptions, it must wrap those exceptions in a SAXException
+ * or an exception derived from a SAXException.</p>
+ *
+ * <p>If the parser or application needs to include information about a
+ * specific location in an XML document, it should use the
+ * {@link org.xml.sax.SAXParseException SAXParseException} subclass.</p>
+ *
+ * @since SAX 1.0
+ * @author David Megginson
+ * @version 2.0.1 (sax2r2)
+ * @see org.xml.sax.SAXParseException
+ */
+public class SAXException extends Exception {
+
+
+    /**
+     * Create a new SAXException.
+     */
+    public SAXException ()
+    {
+        super();
+    }
+
+
+    /**
+     * Create a new SAXException.
+     *
+     * @param message The error or warning message.
+     */
+    public SAXException (String message) {
+        super(message);
+    }
+
+
+    /**
+     * Create a new SAXException wrapping an existing exception.
+     *
+     * <p>The existing exception will be embedded in the new
+     * one, and its message will become the default message for
+     * the SAXException.</p>
+     *
+     * @param e The exception to be wrapped in a SAXException.
+     */
+    public SAXException (Exception e)
+    {
+        super(e);
+    }
+
+
+    /**
+     * Create a new SAXException from an existing exception.
+     *
+     * <p>The existing exception will be embedded in the new
+     * one, but the new exception will have its own message.</p>
+     *
+     * @param message The detail message.
+     * @param e The exception to be wrapped in a SAXException.
+     */
+    public SAXException (String message, Exception e)
+    {
+        super(message, e);
+    }
+
+
+    /**
+     * Return a detail message for this exception.
+     *
+     * <p>If there is an embedded exception, and if the SAXException
+     * has no detail message of its own, this method will return
+     * the detail message from the embedded exception.</p>
+     *
+     * @return The error or warning message.
+     */
+    public String getMessage ()
+    {
+        String message = super.getMessage();
+        Throwable cause = super.getCause();
+
+        if (message == null && cause != null) {
+            return cause.getMessage();
+        } else {
+            return message;
+        }
+    }
+
+    /**
+     * Return the embedded exception, if any.
+     *
+     * @return The embedded exception, or null if there is none.
+     */
+    public Exception getException ()
+    {
+        return getExceptionInternal();
+    }
+
+    /**
+     * Return the cause of the exception
+     *
+     * @return Return the cause of the exception
+     */
+    public Throwable getCause() {
+        return super.getCause();
+    }
+
+    /**
+     * Override toString to pick up any embedded exception.
+     *
+     * @return A string representation of this exception.
+     */
+    public String toString ()
+    {
+        Throwable exception = super.getCause();
+        if (exception != null) {
+            return super.toString() + "\n" + exception.toString();
+        } else {
+            return super.toString();
+        }
+    }
+
+
+
+    //--------------------------------------------------------------------
+    // Internal state.
+    //--------------------------------------------------------------------
+
+    @java.io.Serial
+    private static final ObjectStreamField[] serialPersistentFields = {
+        new ObjectStreamField( "exception", Exception.class )
+    };
+
+    /**
+     * Writes "exception" field to the stream.
+     *
+     * @param out stream used for serialization.
+     * @throws IOException thrown by <code>ObjectOutputStream</code>
+     */
+    @java.io.Serial
+    private void writeObject(ObjectOutputStream out)
+            throws IOException {
+        ObjectOutputStream.PutField fields = out.putFields();
+        fields.put("exception", getExceptionInternal());
+        out.writeFields();
+    }
+
+    /**
+     * Reads the "exception" field from the stream.
+     * And initializes the "exception" if it wasn't
+     * done before.
+     *
+     * @param in stream used for deserialization
+     * @throws IOException            thrown by <code>ObjectInputStream</code>
+     * @throws ClassNotFoundException thrown by <code>ObjectInputStream</code>
+     */
+    @java.io.Serial
+    private void readObject(ObjectInputStream in)
+            throws IOException, ClassNotFoundException {
+        ObjectInputStream.GetField fields = in.readFields();
+        Exception exception = (Exception) fields.get("exception", null);
+        Throwable superCause = super.getCause();
+
+        // if super.getCause() and 'exception' fields present then always use
+        // getCause() value. Otherwise, use 'exception' to initialize cause
+        if (superCause == null && exception != null) {
+            try {
+                super.initCause(exception);
+            } catch (IllegalStateException e) {
+                throw new InvalidClassException("Inconsistent state: two causes");
+            }
+        }
+    }
+
+    // Internal method to guard against overriding of public getException
+    // method by SAXException subclasses
+    private Exception getExceptionInternal() {
+        Throwable cause = super.getCause();
+        if (cause instanceof Exception) {
+            return (Exception) cause;
+        } else {
+            return null;
+        }
+    }
+
+    // Added serialVersionUID to preserve binary compatibility
+    @java.io.Serial
+    static final long serialVersionUID = 583241635256073760L;
+}
+
+// end of SAXException.java
diff --git a/tests/test_data/std/jdk/internal/org/xml/sax/SAXNotRecognizedException.class b/tests/test_data/std/jdk/internal/org/xml/sax/SAXNotRecognizedException.class
new file mode 100644
index 0000000000000000000000000000000000000000..986228eda67bfc4e50f716b3bde4cb61e8c93650
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/org/xml/sax/SAXNotRecognizedException.java b/tests/test_data/std/jdk/internal/org/xml/sax/SAXNotRecognizedException.java
new file mode 100644
index 00000000..7f516ccc
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/org/xml/sax/SAXNotRecognizedException.java
@@ -0,0 +1,80 @@
+/*
+ * Copyright (c) 2000, 2019, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+// SAXNotRecognizedException.java - unrecognized feature or value.
+// http://www.saxproject.org
+// Written by David Megginson
+// NO WARRANTY!  This class is in the Public Domain.
+// $Id: SAXNotRecognizedException.java,v 1.3 2004/11/03 22:55:32 jsuttor Exp $
+
+package jdk.internal.org.xml.sax;
+
+
+/**
+ * Exception class for an unrecognized identifier.
+ *
+ * <blockquote>
+ * <em>This module, both source code and documentation, is in the
+ * Public Domain, and comes with <strong>NO WARRANTY</strong>.</em>
+ * See <a href='http://www.saxproject.org'>http://www.saxproject.org</a>
+ * for further information.
+ * </blockquote>
+ *
+ * <p>An XMLReader will throw this exception when it finds an
+ * unrecognized feature or property identifier; SAX applications and
+ * extensions may use this class for other, similar purposes.</p>
+ *
+ * @since SAX 2.0
+ * @author David Megginson
+ * @see org.xml.sax.SAXNotSupportedException
+ */
+public class SAXNotRecognizedException extends SAXException
+{
+
+    /**
+     * Default constructor.
+     */
+    public SAXNotRecognizedException ()
+    {
+        super();
+    }
+
+
+    /**
+     * Construct a new exception with the given message.
+     *
+     * @param message The text message of the exception.
+     */
+    public SAXNotRecognizedException (String message)
+    {
+        super(message);
+    }
+
+    // Added serialVersionUID to preserve binary compatibility
+    @java.io.Serial
+    static final long serialVersionUID = 5440506620509557213L;
+}
+
+// end of SAXNotRecognizedException.java
diff --git a/tests/test_data/std/jdk/internal/org/xml/sax/SAXNotSupportedException.class b/tests/test_data/std/jdk/internal/org/xml/sax/SAXNotSupportedException.class
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literal 0
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diff --git a/tests/test_data/std/jdk/internal/org/xml/sax/SAXNotSupportedException.java b/tests/test_data/std/jdk/internal/org/xml/sax/SAXNotSupportedException.java
new file mode 100644
index 00000000..323b348b
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/org/xml/sax/SAXNotSupportedException.java
@@ -0,0 +1,80 @@
+/*
+ * Copyright (c) 2000, 2019, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+// SAXNotSupportedException.java - unsupported feature or value.
+// http://www.saxproject.org
+// Written by David Megginson
+// NO WARRANTY!  This class is in the Public Domain.
+// $Id: SAXNotSupportedException.java,v 1.4 2004/11/03 22:55:32 jsuttor Exp $
+
+package jdk.internal.org.xml.sax;
+
+/**
+ * Exception class for an unsupported operation.
+ *
+ * <blockquote>
+ * <em>This module, both source code and documentation, is in the
+ * Public Domain, and comes with <strong>NO WARRANTY</strong>.</em>
+ * See <a href='http://www.saxproject.org'>http://www.saxproject.org</a>
+ * for further information.
+ * </blockquote>
+ *
+ * <p>An XMLReader will throw this exception when it recognizes a
+ * feature or property identifier, but cannot perform the requested
+ * operation (setting a state or value).  Other SAX2 applications and
+ * extensions may use this class for similar purposes.</p>
+ *
+ * @since SAX 2.0
+ * @author David Megginson
+ * @see org.xml.sax.SAXNotRecognizedException
+ */
+public class SAXNotSupportedException extends SAXException
+{
+
+    /**
+     * Construct a new exception with no message.
+     */
+    public SAXNotSupportedException ()
+    {
+        super();
+    }
+
+
+    /**
+     * Construct a new exception with the given message.
+     *
+     * @param message The text message of the exception.
+     */
+    public SAXNotSupportedException (String message)
+    {
+        super(message);
+    }
+
+    // Added serialVersionUID to preserve binary compatibility
+    @java.io.Serial
+    static final long serialVersionUID = -1422818934641823846L;
+}
+
+// end of SAXNotSupportedException.java
diff --git a/tests/test_data/std/jdk/internal/org/xml/sax/SAXParseException.class b/tests/test_data/std/jdk/internal/org/xml/sax/SAXParseException.class
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literal 0
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diff --git a/tests/test_data/std/jdk/internal/org/xml/sax/SAXParseException.java b/tests/test_data/std/jdk/internal/org/xml/sax/SAXParseException.java
new file mode 100644
index 00000000..ffa04918
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/org/xml/sax/SAXParseException.java
@@ -0,0 +1,314 @@
+/*
+ * Copyright (c) 2000, 2019, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+// SAX exception class.
+// http://www.saxproject.org
+// No warranty; no copyright -- use this as you will.
+// $Id: SAXParseException.java,v 1.2 2004/11/03 22:55:32 jsuttor Exp $
+
+package jdk.internal.org.xml.sax;
+
+/**
+ * Encapsulate an XML parse error or warning.
+ *
+ * <blockquote>
+ * <em>This module, both source code and documentation, is in the
+ * Public Domain, and comes with <strong>NO WARRANTY</strong>.</em>
+ * See <a href='http://www.saxproject.org'>http://www.saxproject.org</a>
+ * for further information.
+ * </blockquote>
+ *
+ * <p>This exception may include information for locating the error
+ * in the original XML document, as if it came from a {@link Locator}
+ * object.  Note that although the application
+ * will receive a SAXParseException as the argument to the handlers
+ * in the {@link org.xml.sax.ErrorHandler ErrorHandler} interface,
+ * the application is not actually required to throw the exception;
+ * instead, it can simply read the information in it and take a
+ * different action.</p>
+ *
+ * <p>Since this exception is a subclass of {@link org.xml.sax.SAXException
+ * SAXException}, it inherits the ability to wrap another exception.</p>
+ *
+ * @since SAX 1.0
+ * @author David Megginson
+ * @version 2.0.1 (sax2r2)
+ * @see org.xml.sax.SAXException
+ * @see org.xml.sax.Locator
+ * @see org.xml.sax.ErrorHandler
+ */
+public class SAXParseException extends SAXException {
+
+
+    //--------------------------------------------------------------------
+    // Constructors.
+    //--------------------------------------------------------------------
+
+
+    /**
+     * Create a new SAXParseException from a message and a Locator.
+     *
+     * <p>This constructor is especially useful when an application is
+     * creating its own exception from within a {@link org.xml.sax.ContentHandler
+     * ContentHandler} callback.</p>
+     *
+     * @param message The error or warning message.
+     * @param locator The locator object for the error or warning (may be
+     *        null).
+     * @see org.xml.sax.Locator
+     */
+    public SAXParseException (String message, Locator locator) {
+        super(message);
+        if (locator != null) {
+            init(locator.getPublicId(), locator.getSystemId(),
+                 locator.getLineNumber(), locator.getColumnNumber());
+        } else {
+            init(null, null, -1, -1);
+        }
+    }
+
+
+    /**
+     * Wrap an existing exception in a SAXParseException.
+     *
+     * <p>This constructor is especially useful when an application is
+     * creating its own exception from within a {@link org.xml.sax.ContentHandler
+     * ContentHandler} callback, and needs to wrap an existing exception that is not a
+     * subclass of {@link org.xml.sax.SAXException SAXException}.</p>
+     *
+     * @param message The error or warning message, or null to
+     *                use the message from the embedded exception.
+     * @param locator The locator object for the error or warning (may be
+     *        null).
+     * @param e Any exception.
+     * @see org.xml.sax.Locator
+     */
+    public SAXParseException (String message, Locator locator,
+                              Exception e) {
+        super(message, e);
+        if (locator != null) {
+            init(locator.getPublicId(), locator.getSystemId(),
+                 locator.getLineNumber(), locator.getColumnNumber());
+        } else {
+            init(null, null, -1, -1);
+        }
+    }
+
+
+    /**
+     * Create a new SAXParseException.
+     *
+     * <p>This constructor is most useful for parser writers.</p>
+     *
+     * <p>All parameters except the message are as if
+     * they were provided by a {@link Locator}.  For example, if the
+     * system identifier is a URL (including relative filename), the
+     * caller must resolve it fully before creating the exception.</p>
+     *
+     *
+     * @param message The error or warning message.
+     * @param publicId The public identifier of the entity that generated
+     *                 the error or warning.
+     * @param systemId The system identifier of the entity that generated
+     *                 the error or warning.
+     * @param lineNumber The line number of the end of the text that
+     *                   caused the error or warning.
+     * @param columnNumber The column number of the end of the text that
+     *                     cause the error or warning.
+     */
+    public SAXParseException (String message, String publicId, String systemId,
+                              int lineNumber, int columnNumber)
+    {
+        super(message);
+        init(publicId, systemId, lineNumber, columnNumber);
+    }
+
+
+    /**
+     * Create a new SAXParseException with an embedded exception.
+     *
+     * <p>This constructor is most useful for parser writers who
+     * need to wrap an exception that is not a subclass of
+     * {@link org.xml.sax.SAXException SAXException}.</p>
+     *
+     * <p>All parameters except the message and exception are as if
+     * they were provided by a {@link Locator}.  For example, if the
+     * system identifier is a URL (including relative filename), the
+     * caller must resolve it fully before creating the exception.</p>
+     *
+     * @param message The error or warning message, or null to use
+     *                the message from the embedded exception.
+     * @param publicId The public identifier of the entity that generated
+     *                 the error or warning.
+     * @param systemId The system identifier of the entity that generated
+     *                 the error or warning.
+     * @param lineNumber The line number of the end of the text that
+     *                   caused the error or warning.
+     * @param columnNumber The column number of the end of the text that
+     *                     cause the error or warning.
+     * @param e Another exception to embed in this one.
+     */
+    public SAXParseException (String message, String publicId, String systemId,
+                              int lineNumber, int columnNumber, Exception e)
+    {
+        super(message, e);
+        init(publicId, systemId, lineNumber, columnNumber);
+    }
+
+
+    /**
+     * Internal initialization method.
+     *
+     * @param publicId The public identifier of the entity which generated the exception,
+     *        or null.
+     * @param systemId The system identifier of the entity which generated the exception,
+     *        or null.
+     * @param lineNumber The line number of the error, or -1.
+     * @param columnNumber The column number of the error, or -1.
+     */
+    private void init (String publicId, String systemId,
+                       int lineNumber, int columnNumber)
+    {
+        this.publicId = publicId;
+        this.systemId = systemId;
+        this.lineNumber = lineNumber;
+        this.columnNumber = columnNumber;
+    }
+
+
+    /**
+     * Get the public identifier of the entity where the exception occurred.
+     *
+     * @return A string containing the public identifier, or null
+     *         if none is available.
+     * @see org.xml.sax.Locator#getPublicId
+     */
+    public String getPublicId ()
+    {
+        return this.publicId;
+    }
+
+
+    /**
+     * Get the system identifier of the entity where the exception occurred.
+     *
+     * <p>If the system identifier is a URL, it will have been resolved
+     * fully.</p>
+     *
+     * @return A string containing the system identifier, or null
+     *         if none is available.
+     * @see org.xml.sax.Locator#getSystemId
+     */
+    public String getSystemId ()
+    {
+        return this.systemId;
+    }
+
+
+    /**
+     * The line number of the end of the text where the exception occurred.
+     *
+     * <p>The first line is line 1.</p>
+     *
+     * @return An integer representing the line number, or -1
+     *         if none is available.
+     * @see org.xml.sax.Locator#getLineNumber
+     */
+    public int getLineNumber ()
+    {
+        return this.lineNumber;
+    }
+
+
+    /**
+     * The column number of the end of the text where the exception occurred.
+     *
+     * <p>The first column in a line is position 1.</p>
+     *
+     * @return An integer representing the column number, or -1
+     *         if none is available.
+     * @see org.xml.sax.Locator#getColumnNumber
+     */
+    public int getColumnNumber ()
+    {
+        return this.columnNumber;
+    }
+
+    /**
+     * Override toString to provide more detailed error message.
+     *
+     * @return A string representation of this exception.
+     */
+    public String toString() {
+        StringBuilder buf = new StringBuilder(getClass().getName());
+        String message = getLocalizedMessage();
+        if (publicId!=null)    buf.append("publicId: ").append(publicId);
+        if (systemId!=null)    buf.append("; systemId: ").append(systemId);
+        if (lineNumber!=-1)    buf.append("; lineNumber: ").append(lineNumber);
+        if (columnNumber!=-1)  buf.append("; columnNumber: ").append(columnNumber);
+
+       //append the exception message at the end
+        if (message!=null)     buf.append("; ").append(message);
+        return buf.toString();
+    }
+
+    //--------------------------------------------------------------------
+    // Internal state.
+    //--------------------------------------------------------------------
+
+
+    /**
+     * @serial The public identifier, or null.
+     * @see #getPublicId
+     */
+    private String publicId;
+
+
+    /**
+     * @serial The system identifier, or null.
+     * @see #getSystemId
+     */
+    private String systemId;
+
+
+    /**
+     * @serial The line number, or -1.
+     * @see #getLineNumber
+     */
+    private int lineNumber;
+
+
+    /**
+     * @serial The column number, or -1.
+     * @see #getColumnNumber
+     */
+    private int columnNumber;
+
+    // Added serialVersionUID to preserve binary compatibility
+    @java.io.Serial
+    static final long serialVersionUID = -5651165872476709336L;
+}
+
+// end of SAXParseException.java
diff --git a/tests/test_data/std/jdk/internal/org/xml/sax/XMLReader.class b/tests/test_data/std/jdk/internal/org/xml/sax/XMLReader.class
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diff --git a/tests/test_data/std/jdk/internal/org/xml/sax/XMLReader.java b/tests/test_data/std/jdk/internal/org/xml/sax/XMLReader.java
new file mode 100644
index 00000000..c0a93b71
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/org/xml/sax/XMLReader.java
@@ -0,0 +1,428 @@
+/*
+ * Copyright (c) 2000, 2012, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+// XMLReader.java - read an XML document.
+// http://www.saxproject.org
+// Written by David Megginson
+// NO WARRANTY!  This class is in the Public Domain.
+// $Id: XMLReader.java,v 1.3 2004/11/03 22:55:32 jsuttor Exp $
+
+package jdk.internal.org.xml.sax;
+
+import java.io.IOException;
+
+
+/**
+ * Interface for reading an XML document using callbacks.
+ *
+ * <blockquote>
+ * <em>This module, both source code and documentation, is in the
+ * Public Domain, and comes with <strong>NO WARRANTY</strong>.</em>
+ * See <a href='http://www.saxproject.org'>http://www.saxproject.org</a>
+ * for further information.
+ * </blockquote>
+ *
+ * <p><strong>Note:</strong> despite its name, this interface does
+ * <em>not</em> extend the standard Java {@link java.io.Reader Reader}
+ * interface, because reading XML is a fundamentally different activity
+ * than reading character data.</p>
+ *
+ * <p>XMLReader is the interface that an XML parser's SAX2 driver must
+ * implement.  This interface allows an application to set and
+ * query features and properties in the parser, to register
+ * event handlers for document processing, and to initiate
+ * a document parse.</p>
+ *
+ * <p>All SAX interfaces are assumed to be synchronous: the
+ * {@link #parse parse} methods must not return until parsing
+ * is complete, and readers must wait for an event-handler callback
+ * to return before reporting the next event.</p>
+ *
+ * <p>This interface replaces the (now deprecated) SAX 1.0 {@link
+ * org.xml.sax.Parser Parser} interface.  The XMLReader interface
+ * contains two important enhancements over the old Parser
+ * interface (as well as some minor ones):</p>
+ *
+ * <ol>
+ * <li>it adds a standard way to query and set features and
+ *  properties; and</li>
+ * <li>it adds Namespace support, which is required for many
+ *  higher-level XML standards.</li>
+ * </ol>
+ *
+ * <p>There are adapters available to convert a SAX1 Parser to
+ * a SAX2 XMLReader and vice-versa.</p>
+ *
+ * @since SAX 2.0
+ * @author David Megginson
+ * @see org.xml.sax.XMLFilter
+ * @see org.xml.sax.helpers.ParserAdapter
+ * @see org.xml.sax.helpers.XMLReaderAdapter
+ */
+public interface XMLReader
+{
+
+
+    //------------------------------------------------------------------
+    // Configuration.
+    //------------------------------------------------------------------
+
+
+    /**
+     * Look up the value of a feature flag.
+     *
+     * <p>The feature name is any fully-qualified URI.  It is
+     * possible for an XMLReader to recognize a feature name but
+     * temporarily be unable to return its value.
+     * Some feature values may be available only in specific
+     * contexts, such as before, during, or after a parse.
+     * Also, some feature values may not be programmatically accessible.
+     * (In the case of an adapter for SAX1 {@link Parser}, there is no
+     * implementation-independent way to expose whether the underlying
+     * parser is performing validation, expanding external entities,
+     * and so forth.) </p>
+     *
+     * <p>All XMLReaders are required to recognize the
+     * http://xml.org/sax/features/namespaces and the
+     * http://xml.org/sax/features/namespace-prefixes feature names.</p>
+     *
+     * <p>Typical usage is something like this:</p>
+     *
+     * <pre>
+     * XMLReader r = new MySAXDriver();
+     *
+     *                         // try to activate validation
+     * try {
+     *   r.setFeature("http://xml.org/sax/features/validation", true);
+     * } catch (SAXException e) {
+     *   System.err.println("Cannot activate validation.");
+     * }
+     *
+     *                         // register event handlers
+     * r.setContentHandler(new MyContentHandler());
+     * r.setErrorHandler(new MyErrorHandler());
+     *
+     *                         // parse the first document
+     * try {
+     *   r.parse("http://www.foo.com/mydoc.xml");
+     * } catch (IOException e) {
+     *   System.err.println("I/O exception reading XML document");
+     * } catch (SAXException e) {
+     *   System.err.println("XML exception reading document.");
+     * }
+     * </pre>
+     *
+     * <p>Implementors are free (and encouraged) to invent their own features,
+     * using names built on their own URIs.</p>
+     *
+     * @param name The feature name, which is a fully-qualified URI.
+     * @return The current value of the feature (true or false).
+     * @exception org.xml.sax.SAXNotRecognizedException If the feature
+     *            value can't be assigned or retrieved.
+     * @exception org.xml.sax.SAXNotSupportedException When the
+     *            XMLReader recognizes the feature name but
+     *            cannot determine its value at this time.
+     * @see #setFeature
+     */
+    public boolean getFeature (String name)
+        throws SAXNotRecognizedException, SAXNotSupportedException;
+
+
+    /**
+     * Set the value of a feature flag.
+     *
+     * <p>The feature name is any fully-qualified URI.  It is
+     * possible for an XMLReader to expose a feature value but
+     * to be unable to change the current value.
+     * Some feature values may be immutable or mutable only
+     * in specific contexts, such as before, during, or after
+     * a parse.</p>
+     *
+     * <p>All XMLReaders are required to support setting
+     * http://xml.org/sax/features/namespaces to true and
+     * http://xml.org/sax/features/namespace-prefixes to false.</p>
+     *
+     * @param name The feature name, which is a fully-qualified URI.
+     * @param value The requested value of the feature (true or false).
+     * @exception org.xml.sax.SAXNotRecognizedException If the feature
+     *            value can't be assigned or retrieved.
+     * @exception org.xml.sax.SAXNotSupportedException When the
+     *            XMLReader recognizes the feature name but
+     *            cannot set the requested value.
+     * @see #getFeature
+     */
+    public void setFeature (String name, boolean value)
+        throws SAXNotRecognizedException, SAXNotSupportedException;
+
+
+    /**
+     * Look up the value of a property.
+     *
+     * <p>The property name is any fully-qualified URI.  It is
+     * possible for an XMLReader to recognize a property name but
+     * temporarily be unable to return its value.
+     * Some property values may be available only in specific
+     * contexts, such as before, during, or after a parse.</p>
+     *
+     * <p>XMLReaders are not required to recognize any specific
+     * property names, though an initial core set is documented for
+     * SAX2.</p>
+     *
+     * <p>Implementors are free (and encouraged) to invent their own properties,
+     * using names built on their own URIs.</p>
+     *
+     * @param name The property name, which is a fully-qualified URI.
+     * @return The current value of the property.
+     * @exception org.xml.sax.SAXNotRecognizedException If the property
+     *            value can't be assigned or retrieved.
+     * @exception org.xml.sax.SAXNotSupportedException When the
+     *            XMLReader recognizes the property name but
+     *            cannot determine its value at this time.
+     * @see #setProperty
+     */
+    public Object getProperty (String name)
+        throws SAXNotRecognizedException, SAXNotSupportedException;
+
+
+    /**
+     * Set the value of a property.
+     *
+     * <p>The property name is any fully-qualified URI.  It is
+     * possible for an XMLReader to recognize a property name but
+     * to be unable to change the current value.
+     * Some property values may be immutable or mutable only
+     * in specific contexts, such as before, during, or after
+     * a parse.</p>
+     *
+     * <p>XMLReaders are not required to recognize setting
+     * any specific property names, though a core set is defined by
+     * SAX2.</p>
+     *
+     * <p>This method is also the standard mechanism for setting
+     * extended handlers.</p>
+     *
+     * @param name The property name, which is a fully-qualified URI.
+     * @param value The requested value for the property.
+     * @exception org.xml.sax.SAXNotRecognizedException If the property
+     *            value can't be assigned or retrieved.
+     * @exception org.xml.sax.SAXNotSupportedException When the
+     *            XMLReader recognizes the property name but
+     *            cannot set the requested value.
+     */
+    public void setProperty (String name, Object value)
+        throws SAXNotRecognizedException, SAXNotSupportedException;
+
+
+
+    //------------------------------------------------------------------
+    // Event handlers.
+    //------------------------------------------------------------------
+
+
+    /**
+     * Allow an application to register an entity resolver.
+     *
+     * <p>If the application does not register an entity resolver,
+     * the XMLReader will perform its own default resolution.</p>
+     *
+     * <p>Applications may register a new or different resolver in the
+     * middle of a parse, and the SAX parser must begin using the new
+     * resolver immediately.</p>
+     *
+     * @param resolver The entity resolver.
+     * @see #getEntityResolver
+     */
+    public void setEntityResolver (EntityResolver resolver);
+
+
+    /**
+     * Return the current entity resolver.
+     *
+     * @return The current entity resolver, or null if none
+     *         has been registered.
+     * @see #setEntityResolver
+     */
+    public EntityResolver getEntityResolver ();
+
+
+    /**
+     * Allow an application to register a DTD event handler.
+     *
+     * <p>If the application does not register a DTD handler, all DTD
+     * events reported by the SAX parser will be silently ignored.</p>
+     *
+     * <p>Applications may register a new or different handler in the
+     * middle of a parse, and the SAX parser must begin using the new
+     * handler immediately.</p>
+     *
+     * @param handler The DTD handler.
+     * @see #getDTDHandler
+     */
+    public void setDTDHandler (DTDHandler handler);
+
+
+    /**
+     * Return the current DTD handler.
+     *
+     * @return The current DTD handler, or null if none
+     *         has been registered.
+     * @see #setDTDHandler
+     */
+    public DTDHandler getDTDHandler ();
+
+
+    /**
+     * Allow an application to register a content event handler.
+     *
+     * <p>If the application does not register a content handler, all
+     * content events reported by the SAX parser will be silently
+     * ignored.</p>
+     *
+     * <p>Applications may register a new or different handler in the
+     * middle of a parse, and the SAX parser must begin using the new
+     * handler immediately.</p>
+     *
+     * @param handler The content handler.
+     * @see #getContentHandler
+     */
+    public void setContentHandler (ContentHandler handler);
+
+
+    /**
+     * Return the current content handler.
+     *
+     * @return The current content handler, or null if none
+     *         has been registered.
+     * @see #setContentHandler
+     */
+    public ContentHandler getContentHandler ();
+
+
+    /**
+     * Allow an application to register an error event handler.
+     *
+     * <p>If the application does not register an error handler, all
+     * error events reported by the SAX parser will be silently
+     * ignored; however, normal processing may not continue.  It is
+     * highly recommended that all SAX applications implement an
+     * error handler to avoid unexpected bugs.</p>
+     *
+     * <p>Applications may register a new or different handler in the
+     * middle of a parse, and the SAX parser must begin using the new
+     * handler immediately.</p>
+     *
+     * @param handler The error handler.
+     * @see #getErrorHandler
+     */
+    public void setErrorHandler (ErrorHandler handler);
+
+
+    /**
+     * Return the current error handler.
+     *
+     * @return The current error handler, or null if none
+     *         has been registered.
+     * @see #setErrorHandler
+     */
+    public ErrorHandler getErrorHandler ();
+
+
+
+    //------------------------------------------------------------------
+    // Parsing.
+    //------------------------------------------------------------------
+
+    /**
+     * Parse an XML document.
+     *
+     * <p>The application can use this method to instruct the XML
+     * reader to begin parsing an XML document from any valid input
+     * source (a character stream, a byte stream, or a URI).</p>
+     *
+     * <p>Applications may not invoke this method while a parse is in
+     * progress (they should create a new XMLReader instead for each
+     * nested XML document).  Once a parse is complete, an
+     * application may reuse the same XMLReader object, possibly with a
+     * different input source.
+     * Configuration of the XMLReader object (such as handler bindings and
+     * values established for feature flags and properties) is unchanged
+     * by completion of a parse, unless the definition of that aspect of
+     * the configuration explicitly specifies other behavior.
+     * (For example, feature flags or properties exposing
+     * characteristics of the document being parsed.)
+     * </p>
+     *
+     * <p>During the parse, the XMLReader will provide information
+     * about the XML document through the registered event
+     * handlers.</p>
+     *
+     * <p>This method is synchronous: it will not return until parsing
+     * has ended.  If a client application wants to terminate
+     * parsing early, it should throw an exception.</p>
+     *
+     * @param input The input source for the top-level of the
+     *        XML document.
+     * @exception org.xml.sax.SAXException Any SAX exception, possibly
+     *            wrapping another exception.
+     * @exception java.io.IOException An IO exception from the parser,
+     *            possibly from a byte stream or character stream
+     *            supplied by the application.
+     * @see org.xml.sax.InputSource
+     * @see #parse(java.lang.String)
+     * @see #setEntityResolver
+     * @see #setDTDHandler
+     * @see #setContentHandler
+     * @see #setErrorHandler
+     */
+    public void parse (InputSource input)
+        throws IOException, SAXException;
+
+
+    /**
+     * Parse an XML document from a system identifier (URI).
+     *
+     * <p>This method is a shortcut for the common case of reading a
+     * document from a system identifier.  It is the exact
+     * equivalent of the following:</p>
+     *
+     * <pre>
+     * parse(new InputSource(systemId));
+     * </pre>
+     *
+     * <p>If the system identifier is a URL, it must be fully resolved
+     * by the application before it is passed to the parser.</p>
+     *
+     * @param systemId The system identifier (URI).
+     * @exception org.xml.sax.SAXException Any SAX exception, possibly
+     *            wrapping another exception.
+     * @exception java.io.IOException An IO exception from the parser,
+     *            possibly from a byte stream or character stream
+     *            supplied by the application.
+     * @see #parse(org.xml.sax.InputSource)
+     */
+    public void parse (String systemId)
+        throws IOException, SAXException;
+
+}
diff --git a/tests/test_data/std/jdk/internal/org/xml/sax/helpers/DefaultHandler.class b/tests/test_data/std/jdk/internal/org/xml/sax/helpers/DefaultHandler.class
new file mode 100644
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diff --git a/tests/test_data/std/jdk/internal/org/xml/sax/helpers/DefaultHandler.java b/tests/test_data/std/jdk/internal/org/xml/sax/helpers/DefaultHandler.java
new file mode 100644
index 00000000..93902adf
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/org/xml/sax/helpers/DefaultHandler.java
@@ -0,0 +1,491 @@
+/*
+ * Copyright (c) 2000, 2012, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+// DefaultHandler.java - default implementation of the core handlers.
+// http://www.saxproject.org
+// Written by David Megginson
+// NO WARRANTY!  This class is in the public domain.
+// $Id: DefaultHandler.java,v 1.3 2006/04/13 02:06:32 jeffsuttor Exp $
+
+package jdk.internal.org.xml.sax.helpers;
+
+import java.io.IOException;
+
+import jdk.internal.org.xml.sax.InputSource;
+import jdk.internal.org.xml.sax.Locator;
+import jdk.internal.org.xml.sax.Attributes;
+import jdk.internal.org.xml.sax.EntityResolver;
+import jdk.internal.org.xml.sax.DTDHandler;
+import jdk.internal.org.xml.sax.ContentHandler;
+import jdk.internal.org.xml.sax.ErrorHandler;
+import jdk.internal.org.xml.sax.SAXException;
+import jdk.internal.org.xml.sax.SAXParseException;
+
+
+/**
+ * Default base class for SAX2 event handlers.
+ *
+ * <blockquote>
+ * <em>This module, both source code and documentation, is in the
+ * Public Domain, and comes with <strong>NO WARRANTY</strong>.</em>
+ * See <a href='http://www.saxproject.org'>http://www.saxproject.org</a>
+ * for further information.
+ * </blockquote>
+ *
+ * <p>This class is available as a convenience base class for SAX2
+ * applications: it provides default implementations for all of the
+ * callbacks in the four core SAX2 handler classes:</p>
+ *
+ * <ul>
+ * <li>{@link org.xml.sax.EntityResolver EntityResolver}</li>
+ * <li>{@link org.xml.sax.DTDHandler DTDHandler}</li>
+ * <li>{@link org.xml.sax.ContentHandler ContentHandler}</li>
+ * <li>{@link org.xml.sax.ErrorHandler ErrorHandler}</li>
+ * </ul>
+ *
+ * <p>Application writers can extend this class when they need to
+ * implement only part of an interface; parser writers can
+ * instantiate this class to provide default handlers when the
+ * application has not supplied its own.</p>
+ *
+ * <p>This class replaces the deprecated SAX1
+ * {@link org.xml.sax.HandlerBase HandlerBase} class.</p>
+ *
+ * @since SAX 2.0
+ * @author David Megginson,
+ * @see org.xml.sax.EntityResolver
+ * @see org.xml.sax.DTDHandler
+ * @see org.xml.sax.ContentHandler
+ * @see org.xml.sax.ErrorHandler
+ */
+public class DefaultHandler
+    implements EntityResolver, DTDHandler, ContentHandler, ErrorHandler
+{
+
+
+    //------------------------------------------------------------------
+    // Default implementation of the EntityResolver interface.
+    //------------------------------------------------------------------
+
+    /**
+     * Resolve an external entity.
+     *
+     * <p>Always return null, so that the parser will use the system
+     * identifier provided in the XML document.  This method implements
+     * the SAX default behaviour: application writers can override it
+     * in a subclass to do special translations such as catalog lookups
+     * or URI redirection.</p>
+     *
+     * @param publicId The public identifier, or null if none is
+     *                 available.
+     * @param systemId The system identifier provided in the XML
+     *                 document.
+     * @return The new input source, or null to require the
+     *         default behaviour.
+     * @exception java.io.IOException If there is an error setting
+     *            up the new input source.
+     * @exception org.xml.sax.SAXException Any SAX exception, possibly
+     *            wrapping another exception.
+     * @see org.xml.sax.EntityResolver#resolveEntity
+     */
+    public InputSource resolveEntity (String publicId, String systemId)
+        throws IOException, SAXException
+    {
+        return null;
+    }
+
+
+
+    //------------------------------------------------------------------
+    // Default implementation of DTDHandler interface.
+    //------------------------------------------------------------------
+
+
+    /**
+     * Receive notification of a notation declaration.
+     *
+     * <p>By default, do nothing.  Application writers may override this
+     * method in a subclass if they wish to keep track of the notations
+     * declared in a document.</p>
+     *
+     * @param name The notation name.
+     * @param publicId The notation public identifier, or null if not
+     *                 available.
+     * @param systemId The notation system identifier.
+     * @exception org.xml.sax.SAXException Any SAX exception, possibly
+     *            wrapping another exception.
+     * @see org.xml.sax.DTDHandler#notationDecl
+     */
+    public void notationDecl (String name, String publicId, String systemId)
+        throws SAXException
+    {
+        // no op
+    }
+
+
+    /**
+     * Receive notification of an unparsed entity declaration.
+     *
+     * <p>By default, do nothing.  Application writers may override this
+     * method in a subclass to keep track of the unparsed entities
+     * declared in a document.</p>
+     *
+     * @param name The entity name.
+     * @param publicId The entity public identifier, or null if not
+     *                 available.
+     * @param systemId The entity system identifier.
+     * @param notationName The name of the associated notation.
+     * @exception org.xml.sax.SAXException Any SAX exception, possibly
+     *            wrapping another exception.
+     * @see org.xml.sax.DTDHandler#unparsedEntityDecl
+     */
+    public void unparsedEntityDecl (String name, String publicId,
+                                    String systemId, String notationName)
+        throws SAXException
+    {
+        // no op
+    }
+
+
+
+    //------------------------------------------------------------------
+    // Default implementation of ContentHandler interface.
+    //------------------------------------------------------------------
+
+
+    /**
+     * Receive a Locator object for document events.
+     *
+     * <p>By default, do nothing.  Application writers may override this
+     * method in a subclass if they wish to store the locator for use
+     * with other document events.</p>
+     *
+     * @param locator A locator for all SAX document events.
+     * @see org.xml.sax.ContentHandler#setDocumentLocator
+     * @see org.xml.sax.Locator
+     */
+    public void setDocumentLocator (Locator locator)
+    {
+        // no op
+    }
+
+
+    /**
+     * Receive notification of the beginning of the document.
+     *
+     * <p>By default, do nothing.  Application writers may override this
+     * method in a subclass to take specific actions at the beginning
+     * of a document (such as allocating the root node of a tree or
+     * creating an output file).</p>
+     *
+     * @exception org.xml.sax.SAXException Any SAX exception, possibly
+     *            wrapping another exception.
+     * @see org.xml.sax.ContentHandler#startDocument
+     */
+    public void startDocument ()
+        throws SAXException
+    {
+        // no op
+    }
+
+
+    /**
+     * Receive notification of the end of the document.
+     *
+     * <p>By default, do nothing.  Application writers may override this
+     * method in a subclass to take specific actions at the end
+     * of a document (such as finalising a tree or closing an output
+     * file).</p>
+     *
+     * @exception org.xml.sax.SAXException Any SAX exception, possibly
+     *            wrapping another exception.
+     * @see org.xml.sax.ContentHandler#endDocument
+     */
+    public void endDocument ()
+        throws SAXException
+    {
+        // no op
+    }
+
+
+    /**
+     * Receive notification of the start of a Namespace mapping.
+     *
+     * <p>By default, do nothing.  Application writers may override this
+     * method in a subclass to take specific actions at the start of
+     * each Namespace prefix scope (such as storing the prefix mapping).</p>
+     *
+     * @param prefix The Namespace prefix being declared.
+     * @param uri The Namespace URI mapped to the prefix.
+     * @exception org.xml.sax.SAXException Any SAX exception, possibly
+     *            wrapping another exception.
+     * @see org.xml.sax.ContentHandler#startPrefixMapping
+     */
+    public void startPrefixMapping (String prefix, String uri)
+        throws SAXException
+    {
+        // no op
+    }
+
+
+    /**
+     * Receive notification of the end of a Namespace mapping.
+     *
+     * <p>By default, do nothing.  Application writers may override this
+     * method in a subclass to take specific actions at the end of
+     * each prefix mapping.</p>
+     *
+     * @param prefix The Namespace prefix being declared.
+     * @exception org.xml.sax.SAXException Any SAX exception, possibly
+     *            wrapping another exception.
+     * @see org.xml.sax.ContentHandler#endPrefixMapping
+     */
+    public void endPrefixMapping (String prefix)
+        throws SAXException
+    {
+        // no op
+    }
+
+
+    /**
+     * Receive notification of the start of an element.
+     *
+     * <p>By default, do nothing.  Application writers may override this
+     * method in a subclass to take specific actions at the start of
+     * each element (such as allocating a new tree node or writing
+     * output to a file).</p>
+     *
+     * @param uri The Namespace URI, or the empty string if the
+     *        element has no Namespace URI or if Namespace
+     *        processing is not being performed.
+     * @param localName The local name (without prefix), or the
+     *        empty string if Namespace processing is not being
+     *        performed.
+     * @param qName The qualified name (with prefix), or the
+     *        empty string if qualified names are not available.
+     * @param attributes The attributes attached to the element.  If
+     *        there are no attributes, it shall be an empty
+     *        Attributes object.
+     * @exception org.xml.sax.SAXException Any SAX exception, possibly
+     *            wrapping another exception.
+     * @see org.xml.sax.ContentHandler#startElement
+     */
+    public void startElement (String uri, String localName,
+                              String qName, Attributes attributes)
+        throws SAXException
+    {
+        // no op
+    }
+
+
+    /**
+     * Receive notification of the end of an element.
+     *
+     * <p>By default, do nothing.  Application writers may override this
+     * method in a subclass to take specific actions at the end of
+     * each element (such as finalising a tree node or writing
+     * output to a file).</p>
+     *
+     * @param uri The Namespace URI, or the empty string if the
+     *        element has no Namespace URI or if Namespace
+     *        processing is not being performed.
+     * @param localName The local name (without prefix), or the
+     *        empty string if Namespace processing is not being
+     *        performed.
+     * @param qName The qualified name (with prefix), or the
+     *        empty string if qualified names are not available.
+     * @exception org.xml.sax.SAXException Any SAX exception, possibly
+     *            wrapping another exception.
+     * @see org.xml.sax.ContentHandler#endElement
+     */
+    public void endElement (String uri, String localName, String qName)
+        throws SAXException
+    {
+        // no op
+    }
+
+
+    /**
+     * Receive notification of character data inside an element.
+     *
+     * <p>By default, do nothing.  Application writers may override this
+     * method to take specific actions for each chunk of character data
+     * (such as adding the data to a node or buffer, or printing it to
+     * a file).</p>
+     *
+     * @param ch The characters.
+     * @param start The start position in the character array.
+     * @param length The number of characters to use from the
+     *               character array.
+     * @exception org.xml.sax.SAXException Any SAX exception, possibly
+     *            wrapping another exception.
+     * @see org.xml.sax.ContentHandler#characters
+     */
+    public void characters (char ch[], int start, int length)
+        throws SAXException
+    {
+        // no op
+    }
+
+
+    /**
+     * Receive notification of ignorable whitespace in element content.
+     *
+     * <p>By default, do nothing.  Application writers may override this
+     * method to take specific actions for each chunk of ignorable
+     * whitespace (such as adding data to a node or buffer, or printing
+     * it to a file).</p>
+     *
+     * @param ch The whitespace characters.
+     * @param start The start position in the character array.
+     * @param length The number of characters to use from the
+     *               character array.
+     * @exception org.xml.sax.SAXException Any SAX exception, possibly
+     *            wrapping another exception.
+     * @see org.xml.sax.ContentHandler#ignorableWhitespace
+     */
+    public void ignorableWhitespace (char ch[], int start, int length)
+        throws SAXException
+    {
+        // no op
+    }
+
+
+    /**
+     * Receive notification of a processing instruction.
+     *
+     * <p>By default, do nothing.  Application writers may override this
+     * method in a subclass to take specific actions for each
+     * processing instruction, such as setting status variables or
+     * invoking other methods.</p>
+     *
+     * @param target The processing instruction target.
+     * @param data The processing instruction data, or null if
+     *             none is supplied.
+     * @exception org.xml.sax.SAXException Any SAX exception, possibly
+     *            wrapping another exception.
+     * @see org.xml.sax.ContentHandler#processingInstruction
+     */
+    public void processingInstruction (String target, String data)
+        throws SAXException
+    {
+        // no op
+    }
+
+
+    /**
+     * Receive notification of a skipped entity.
+     *
+     * <p>By default, do nothing.  Application writers may override this
+     * method in a subclass to take specific actions for each
+     * processing instruction, such as setting status variables or
+     * invoking other methods.</p>
+     *
+     * @param name The name of the skipped entity.
+     * @exception org.xml.sax.SAXException Any SAX exception, possibly
+     *            wrapping another exception.
+     * @see org.xml.sax.ContentHandler#processingInstruction
+     */
+    public void skippedEntity (String name)
+        throws SAXException
+    {
+        // no op
+    }
+
+
+
+    //------------------------------------------------------------------
+    // Default implementation of the ErrorHandler interface.
+    //------------------------------------------------------------------
+
+
+    /**
+     * Receive notification of a parser warning.
+     *
+     * <p>The default implementation does nothing.  Application writers
+     * may override this method in a subclass to take specific actions
+     * for each warning, such as inserting the message in a log file or
+     * printing it to the console.</p>
+     *
+     * @param e The warning information encoded as an exception.
+     * @exception org.xml.sax.SAXException Any SAX exception, possibly
+     *            wrapping another exception.
+     * @see org.xml.sax.ErrorHandler#warning
+     * @see org.xml.sax.SAXParseException
+     */
+    public void warning (SAXParseException e)
+        throws SAXException
+    {
+        // no op
+    }
+
+
+    /**
+     * Receive notification of a recoverable parser error.
+     *
+     * <p>The default implementation does nothing.  Application writers
+     * may override this method in a subclass to take specific actions
+     * for each error, such as inserting the message in a log file or
+     * printing it to the console.</p>
+     *
+     * @param e The error information encoded as an exception.
+     * @exception org.xml.sax.SAXException Any SAX exception, possibly
+     *            wrapping another exception.
+     * @see org.xml.sax.ErrorHandler#warning
+     * @see org.xml.sax.SAXParseException
+     */
+    public void error (SAXParseException e)
+        throws SAXException
+    {
+        // no op
+    }
+
+
+    /**
+     * Report a fatal XML parsing error.
+     *
+     * <p>The default implementation throws a SAXParseException.
+     * Application writers may override this method in a subclass if
+     * they need to take specific actions for each fatal error (such as
+     * collecting all of the errors into a single report): in any case,
+     * the application must stop all regular processing when this
+     * method is invoked, since the document is no longer reliable, and
+     * the parser may no longer report parsing events.</p>
+     *
+     * @param e The error information encoded as an exception.
+     * @exception org.xml.sax.SAXException Any SAX exception, possibly
+     *            wrapping another exception.
+     * @see org.xml.sax.ErrorHandler#fatalError
+     * @see org.xml.sax.SAXParseException
+     */
+    public void fatalError (SAXParseException e)
+        throws SAXException
+    {
+        throw e;
+    }
+
+}
+
+// end of DefaultHandler.java
diff --git a/tests/test_data/std/jdk/internal/perf/Perf$CleanerAction.class b/tests/test_data/std/jdk/internal/perf/Perf$CleanerAction.class
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diff --git a/tests/test_data/std/jdk/internal/perf/Perf.java b/tests/test_data/std/jdk/internal/perf/Perf.java
new file mode 100644
index 00000000..e764fe79
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/perf/Perf.java
@@ -0,0 +1,438 @@
+/*
+ * Copyright (c) 2002, 2022, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package jdk.internal.perf;
+
+import java.nio.ByteBuffer;
+import java.security.Permission;
+import java.security.PrivilegedAction;
+import java.io.IOException;
+
+import sun.nio.cs.UTF_8;
+
+import jdk.internal.ref.CleanerFactory;
+
+/**
+ * The Perf class provides the ability to attach to an instrumentation
+ * buffer maintained by a Java virtual machine. The instrumentation
+ * buffer may be for the Java virtual machine running the methods of
+ * this class or it may be for another Java virtual machine on the
+ * same system.
+ * <p>
+ * In addition, this class provides methods to create instrumentation
+ * objects in the instrumentation buffer for the Java virtual machine
+ * that is running these methods. It also contains methods for acquiring
+ * the value of a platform specific high resolution clock for time
+ * stamp and interval measurement purposes.
+ *
+ * @author   Brian Doherty
+ * @since    1.4.2
+ * @see      #getPerf
+ * @see      jdk.internal.perf.Perf.GetPerfAction
+ * @see      java.nio.ByteBuffer
+ */
+public final class Perf {
+
+    private static Perf instance;
+
+    private Perf() { }    // prevent instantiation
+
+    /**
+     * The GetPerfAction class is a convenience class for acquiring access
+     * to the singleton Perf instance using the
+     * <code>AccessController.doPrivileged()</code> method.
+     * <p>
+     * An instance of this class can be used as the argument to
+     * <code>AccessController.doPrivileged(PrivilegedAction)</code>.
+     * <p> Here is a suggested idiom for use of this class:
+     *
+     * <blockquote><pre>{@code
+     * class MyTrustedClass {
+     *   private static final Perf perf =
+     *       AccessController.doPrivileged(new Perf.GetPerfAction<Perf>());
+     *   ...
+     * }
+     * }</pre></blockquote>
+     * <p>
+     * In the presence of a security manager, the <code>MyTrustedClass</code>
+     * class in the above example will need to be granted the
+     * <em>"sun.misc.Perf.getPerf"</em> <code>RuntimePermission</code>
+     * permission in order to successfully acquire the singleton Perf instance.
+     * <p>
+     * Please note that the <em>"sun.misc.Perf.getPerf"</em> permission
+     * is not a JDK specified permission.
+     *
+     * @see  java.security.AccessController#doPrivileged(PrivilegedAction)
+     * @see  java.lang.RuntimePermission
+     */
+    public static class GetPerfAction implements PrivilegedAction<Perf>
+    {
+        /**
+         * Run the <code>Perf.getPerf()</code> method in a privileged context.
+         *
+         * @see #getPerf
+         */
+        public Perf run() {
+            return getPerf();
+        }
+    }
+
+    /**
+     * Return a reference to the singleton Perf instance.
+     * <p>
+     * The getPerf() method returns the singleton instance of the Perf
+     * class. The returned object provides the caller with the capability
+     * for accessing the instrumentation buffer for this or another local
+     * Java virtual machine.
+     * <p>
+     * If a security manager is installed, its <code>checkPermission</code>
+     * method is called with a <code>RuntimePermission</code> with a target
+     * of <em>"sun.misc.Perf.getPerf"</em>. A security exception will result
+     * if the caller has not been granted this permission.
+     * <p>
+     * Access to the returned <code>Perf</code> object should be protected
+     * by its caller and not passed on to untrusted code. This object can
+     * be used to attach to the instrumentation buffer provided by this Java
+     * virtual machine or for those of other Java virtual machines running
+     * on the same system. The instrumentation buffer may contain senstitive
+     * information. API's built on top of this interface may want to provide
+     * finer grained access control to the contents of individual
+     * instrumentation objects contained within the buffer.
+     * <p>
+     * Please note that the <em>"sun.misc.Perf.getPerf"</em> permission
+     * is not a JDK specified permission.
+     *
+     * @return  A reference to the singleton Perf instance.
+     * @throws SecurityException  if a security manager exists and its
+     *         <code>checkPermission</code> method doesn't allow access
+     *         to the <em>"jdk.internal.perf.Perf.getPerf""</em> target.
+     * @see  java.lang.RuntimePermission
+     * @see  #attach
+     */
+    public static Perf getPerf()
+    {
+        @SuppressWarnings("removal")
+        SecurityManager security = System.getSecurityManager();
+        if (security != null) {
+            Permission perm = new RuntimePermission("jdk.internal.perf.Perf.getPerf");
+            security.checkPermission(perm);
+        }
+
+        return instance;
+    }
+
+    /**
+     * Attach to the instrumentation buffer for the specified Java virtual
+     * machine.
+     * <p>
+     * This method will attach to the instrumentation buffer for the
+     * specified virtual machine. It returns a <code>ByteBuffer</code> object
+     * that is initialized to access the instrumentation buffer for the
+     * indicated Java virtual machine. The <code>lvmid</code> parameter is
+     * a integer value that uniquely identifies the target local Java virtual
+     * machine. It is typically, but not necessarily, the process id of
+     * the target Java virtual machine.
+     * <p>
+     * If the <code>lvmid</code> identifies a Java virtual machine different
+     * from the one running this method, then the coherency characteristics
+     * of the buffer are implementation dependent. Implementations that do
+     * not support named, coherent, shared memory may return a
+     * <code>ByteBuffer</code> object that contains only a snap shot of the
+     * data in the instrumentation buffer. Implementations that support named,
+     * coherent, shared memory, may return a <code>ByteBuffer</code> object
+     * that will be changing dynamically over time as the target Java virtual
+     * machine updates its mapping of this buffer.
+     * <p>
+     * If the <code>lvmid</code> is 0 or equal to the actual <code>lvmid</code>
+     * for the Java virtual machine running this method, then the returned
+     * <code>ByteBuffer</code> object will always be coherent and dynamically
+     * changing.
+     *
+     * @param   lvmid            an integer that uniquely identifies the
+     *                           target local Java virtual machine.
+     * @return  ByteBuffer       a direct allocated byte buffer
+     * @throws  IllegalArgumentException  The lvmid was invalid.
+     * @throws  IOException      An I/O error occurred while trying to acquire
+     *                           the instrumentation buffer.
+     * @throws  OutOfMemoryError The instrumentation buffer could not be mapped
+     *                           into the virtual machine's address space.
+     * @see     java.nio.ByteBuffer
+     */
+    public ByteBuffer attach(int lvmid) throws IOException
+    {
+        final ByteBuffer b = attach0(lvmid);
+
+        if (lvmid == 0) {
+            // The native instrumentation buffer for this Java virtual
+            // machine is never unmapped.
+            return b;
+        }
+        else {
+            // This is an instrumentation buffer for another Java virtual
+            // machine with native resources that need to be managed. We
+            // create a duplicate of the native ByteBuffer and manage it
+            // with a Cleaner. When the duplicate becomes phantom reachable,
+            // the native resources will be released.
+
+            final ByteBuffer dup = b.duplicate();
+
+            CleanerFactory.cleaner()
+                          .register(dup, new CleanerAction(instance, b));
+            return dup;
+        }
+    }
+
+    private static class CleanerAction implements Runnable {
+        private final ByteBuffer bb;
+        private final Perf perf;
+        CleanerAction(Perf perf, ByteBuffer bb) {
+            this.perf = perf;
+            this.bb = bb;
+        }
+        public void run() {
+            try {
+                perf.detach(bb);
+            } catch (Throwable th) {
+                // avoid crashing the reference handler thread,
+                // but provide for some diagnosability
+                assert false : th.toString();
+            }
+        }
+    }
+
+    /**
+     * Native method to perform the implementation specific attach mechanism.
+     * <p>
+     * The implementation of this method may return distinct or identical
+     * <code>ByteBuffer</code> objects for two distinct calls requesting
+     * attachment to the same Java virtual machine.
+     * <p>
+     * For the Sun HotSpot JVM, two distinct calls to attach to the same
+     * target Java virtual machine will result in two distinct ByteBuffer
+     * objects returned by this method. This may change in a future release.
+     *
+     * @param   lvmid            an integer that uniquely identifies the
+     *                           target local Java virtual machine.
+     * @return  ByteBuffer       a direct allocated byte buffer
+     * @throws  IllegalArgumentException  The lvmid was invalid.
+     * @throws  IOException      An I/O error occurred while trying to acquire
+     *                           the instrumentation buffer.
+     * @throws  OutOfMemoryError The instrumentation buffer could not be mapped
+     *                           into the virtual machine's address space.
+     */
+    private native ByteBuffer attach0(int lvmid) throws IOException;
+
+    /**
+     * Native method to perform the implementation specific detach mechanism.
+     * <p>
+     * If this method is passed a <code>ByteBuffer</code> object that is
+     * not created by the <code>attach</code> method, then the results of
+     * this method are undefined, with unpredictable and potentially damaging
+     * effects to the Java virtual machine. To prevent accidental or malicious
+     * use of this method, all native ByteBuffer created by the <code>
+     * attach</code> method are managed internally as PhantomReferences
+     * and resources are freed by the system.
+     * <p>
+     * If this method is passed a <code>ByteBuffer</code> object created
+     * by the <code>attach</code> method with a lvmid for the Java virtual
+     * machine running this method (lvmid=0, for example), then the detach
+     * request is silently ignored.
+     *
+     * @param bb  A direct allocated byte buffer created by the
+     *                    <code>attach</code> method.
+     * @see   java.nio.ByteBuffer
+     * @see   #attach
+     */
+    private native void detach(ByteBuffer bb);
+
+    /**
+     * Create a <code>long</code> scalar entry in the instrumentation buffer
+     * with the given variability characteristic, units, and initial value.
+     * <p>
+     * Access to the instrument is provided through the returned <code>
+     * ByteBuffer</code> object. Typically, this object should be wrapped
+     * with <code>LongBuffer</code> view object.
+     *
+     * @param   variability the variability characteristic for this entry.
+     * @param   units       the units for this entry.
+     * @param   name        the name of this entry.
+     * @param   value       the initial value for this entry.
+     * @return  ByteBuffer  a direct allocated ByteBuffer object that
+     *                      allows write access to a native memory location
+     *                      containing a <code>long</code> value.
+     *
+     * see sun.misc.perf.Variability
+     * see sun.misc.perf.Units
+     * @see java.nio.ByteBuffer
+     */
+    public native ByteBuffer createLong(String name, int variability,
+                                        int units, long value);
+
+    /**
+     * Create a <code>String</code> entry in the instrumentation buffer with
+     * the given variability characteristic, units, and initial value.
+     * <p>
+     * The maximum length of the <code>String</code> stored in this string
+     * instrument is given in by <code>maxLength</code> parameter. Updates
+     * to this instrument with <code>String</code> values with lengths greater
+     * than <code>maxLength</code> will be truncated to <code>maxLength</code>.
+     * The truncated value will be terminated by a null character.
+     * <p>
+     * The underlying implementation may further limit the length of the
+     * value, but will continue to preserve the null terminator.
+     * <p>
+     * Access to the instrument is provided through the returned <code>
+     * ByteBuffer</code> object.
+     *
+     * @param   variability the variability characteristic for this entry.
+     * @param   units       the units for this entry.
+     * @param   name        the name of this entry.
+     * @param   value       the initial value for this entry.
+     * @param   maxLength   the maximum string length for this string
+     *                      instrument.
+     * @return  ByteBuffer  a direct allocated ByteBuffer that allows
+     *                      write access to a native memory location
+     *                      containing a <code>long</code> value.
+     *
+     * see sun.misc.perf.Variability
+     * see sun.misc.perf.Units
+     * @see java.nio.ByteBuffer
+     */
+    public ByteBuffer createString(String name, int variability,
+                                   int units, String value, int maxLength)
+    {
+        byte[] v = value.getBytes(UTF_8.INSTANCE);
+        byte[] v1 = new byte[v.length+1];
+        System.arraycopy(v, 0, v1, 0, v.length);
+        v1[v.length] = '\0';
+        return createByteArray(name, variability, units, v1, Math.max(v1.length, maxLength));
+    }
+
+    /**
+     * Create a <code>String</code> entry in the instrumentation buffer with
+     * the given variability characteristic, units, and initial value.
+     * <p>
+     * The maximum length of the <code>String</code> stored in this string
+     * instrument is implied by the length of the <code>value</code> parameter.
+     * Subsequent updates to the value of this instrument will be truncated
+     * to this implied maximum length. The truncated value will be terminated
+     * by a null character.
+     * <p>
+     * The underlying implementation may further limit the length of the
+     * initial or subsequent value, but will continue to preserve the null
+     * terminator.
+     * <p>
+     * Access to the instrument is provided through the returned <code>
+     * ByteBuffer</code> object.
+     *
+     * @param   variability the variability characteristic for this entry.
+     * @param   units       the units for this entry.
+     * @param   name        the name of this entry.
+     * @param   value       the initial value for this entry.
+     * @return  ByteBuffer  a direct allocated ByteBuffer that allows
+     *                      write access to a native memory location
+     *                      containing a <code>long</code> value.
+     *
+     * see sun.misc.perf.Variability
+     * see sun.misc.perf.Units
+     * @see java.nio.ByteBuffer
+     */
+    public ByteBuffer createString(String name, int variability,
+                                   int units, String value)
+    {
+        byte[] v = value.getBytes(UTF_8.INSTANCE);
+        byte[] v1 = new byte[v.length+1];
+        System.arraycopy(v, 0, v1, 0, v.length);
+        v1[v.length] = '\0';
+        return createByteArray(name, variability, units, v1, v1.length);
+    }
+
+    /**
+     * Create a <code>byte</code> vector entry in the instrumentation buffer
+     * with the given variability characteristic, units, and initial value.
+     * <p>
+     * The <code>maxLength</code> parameter limits the size of the byte
+     * array instrument such that the initial or subsequent updates beyond
+     * this length are silently ignored. No special handling of truncated
+     * updates is provided.
+     * <p>
+     * The underlying implementation may further limit the length of the
+     * length of the initial or subsequent value.
+     * <p>
+     * Access to the instrument is provided through the returned <code>
+     * ByteBuffer</code> object.
+     *
+     * @param   variability the variability characteristic for this entry.
+     * @param   units       the units for this entry.
+     * @param   name        the name of this entry.
+     * @param   value       the initial value for this entry.
+     * @param   maxLength   the maximum length of this byte array.
+     * @return  ByteBuffer  a direct allocated byte buffer that allows
+     *                      write access to a native memory location
+     *                      containing a <code>long</code> value.
+     *
+     * see sun.misc.perf.Variability
+     * see sun.misc.perf.Units
+     * @see java.nio.ByteBuffer
+     */
+    public native ByteBuffer createByteArray(String name, int variability,
+                                             int units, byte[] value,
+                                             int maxLength);
+
+    /**
+     * Return the value of the High Resolution Counter.
+     *
+     * The High Resolution Counter returns the number of ticks since
+     * since the start of the Java virtual machine. The resolution of
+     * the counter is machine dependent and can be determined from the
+     * value return by the {@link #highResFrequency} method.
+     *
+     * @return  the number of ticks of machine dependent resolution since
+     *          the start of the Java virtual machine.
+     *
+     * @see #highResFrequency
+     * @see java.lang.System#currentTimeMillis()
+     */
+    public native long highResCounter();
+
+    /**
+     * Returns the frequency of the High Resolution Counter, in ticks per
+     * second.
+     *
+     * This value can be used to convert the value of the High Resolution
+     * Counter, as returned from a call to the {@link #highResCounter} method,
+     * into the number of seconds since the start of the Java virtual machine.
+     *
+     * @return  the frequency of the High Resolution Counter.
+     * @see #highResCounter
+     */
+    public native long highResFrequency();
+
+    private static native void registerNatives();
+
+    static {
+        registerNatives();
+        instance = new Perf();
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/perf/PerfCounter$CoreCounters.class b/tests/test_data/std/jdk/internal/perf/PerfCounter$CoreCounters.class
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/perf/PerfCounter.class b/tests/test_data/std/jdk/internal/perf/PerfCounter.class
new file mode 100644
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/perf/PerfCounter.java b/tests/test_data/std/jdk/internal/perf/PerfCounter.java
new file mode 100644
index 00000000..b0a87c20
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/perf/PerfCounter.java
@@ -0,0 +1,182 @@
+/*
+ * Copyright (c) 2009, 2021, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package jdk.internal.perf;
+
+import java.nio.ByteBuffer;
+import java.nio.ByteOrder;
+import java.nio.LongBuffer;
+import java.security.AccessController;
+
+/**
+ * Performance counter support for internal JRE classes.
+ * This class defines a fixed list of counters for the platform
+ * to use as an interim solution until RFE# 6209222 is implemented.
+ * The perf counters will be created in the jvmstat perf buffer
+ * that the HotSpot VM creates. The default size is 32K and thus
+ * the number of counters is bounded.  You can alter the size
+ * with {@code -XX:PerfDataMemorySize=<bytes>} option. If there is
+ * insufficient memory in the jvmstat perf buffer, the C heap memory
+ * will be used and thus the application will continue to run if
+ * the counters added exceeds the buffer size but the counters
+ * will be missing.
+ *
+ * See HotSpot jvmstat implementation for certain circumstances
+ * that the jvmstat perf buffer is not supported.
+ *
+ */
+public class PerfCounter {
+    @SuppressWarnings("removal")
+    private static final Perf perf =
+        AccessController.doPrivileged(new Perf.GetPerfAction());
+
+    // Must match values defined in hotspot/src/share/vm/runtime/perfdata.hpp
+    private static final int V_Constant  = 1;
+    private static final int V_Monotonic = 2;
+    private static final int V_Variable  = 3;
+    private static final int U_None      = 1;
+
+    private final String name;
+    private final LongBuffer lb;
+
+    private PerfCounter(String name, int type) {
+        this.name = name;
+        ByteBuffer bb = perf.createLong(name, type, U_None, 0L);
+        bb.order(ByteOrder.nativeOrder());
+        this.lb = bb.asLongBuffer();
+    }
+
+    public static PerfCounter newPerfCounter(String name) {
+        return new PerfCounter(name, V_Variable);
+    }
+
+    public static PerfCounter newConstantPerfCounter(String name) {
+        PerfCounter c = new PerfCounter(name, V_Constant);
+        return c;
+    }
+
+    /**
+     * Returns the current value of the perf counter.
+     */
+    public synchronized long get() {
+        return lb.get(0);
+    }
+
+    /**
+     * Sets the value of the perf counter to the given newValue.
+     */
+    public synchronized void set(long newValue) {
+        lb.put(0, newValue);
+    }
+
+    /**
+     * Adds the given value to the perf counter.
+     */
+    public synchronized void add(long value) {
+        long res = get() + value;
+        lb.put(0, res);
+    }
+
+    /**
+     * Increments the perf counter with 1.
+     */
+    public void increment() {
+        add(1);
+    }
+
+    /**
+     * Adds the given interval to the perf counter.
+     */
+    public void addTime(long interval) {
+        add(interval);
+    }
+
+    /**
+     * Adds the elapsed time from the given start time (ns) to the perf counter.
+     */
+    public void addElapsedTimeFrom(long startTime) {
+        add(System.nanoTime() - startTime);
+    }
+
+    @Override
+    public String toString() {
+        return name + " = " + get();
+    }
+
+    static class CoreCounters {
+        static final PerfCounter pdt   = newPerfCounter("sun.classloader.parentDelegationTime");
+        static final PerfCounter lc    = newPerfCounter("sun.classloader.findClasses");
+        static final PerfCounter lct   = newPerfCounter("sun.classloader.findClassTime");
+        static final PerfCounter rcbt  = newPerfCounter("sun.urlClassLoader.readClassBytesTime");
+        static final PerfCounter zfc   = newPerfCounter("sun.zip.zipFiles");
+        static final PerfCounter zfot  = newPerfCounter("sun.zip.zipFile.openTime");
+    }
+
+    /**
+     * Number of findClass calls
+     */
+    public static PerfCounter getFindClasses() {
+        return CoreCounters.lc;
+    }
+
+    /**
+     * Time (ns) spent in finding classes that includes
+     * lookup and read class bytes and defineClass
+     */
+    public static PerfCounter getFindClassTime() {
+        return CoreCounters.lct;
+    }
+
+    /**
+     * Time (ns) spent in finding classes
+     */
+    public static PerfCounter getReadClassBytesTime() {
+        return CoreCounters.rcbt;
+    }
+
+    /**
+     * Time (ns) spent in the parent delegation to
+     * the parent of the defining class loader
+     */
+    public static PerfCounter getParentDelegationTime() {
+        return CoreCounters.pdt;
+    }
+
+    /**
+     * Number of zip files opened.
+     */
+    public static PerfCounter getZipFileCount() {
+        return CoreCounters.zfc;
+    }
+
+    /**
+     * Time (ns) spent in opening the zip files that
+     * includes building the entries hash table
+     */
+    public static PerfCounter getZipFileOpenTime() {
+        return CoreCounters.zfot;
+    }
+
+}
diff --git a/tests/test_data/std/jdk/internal/platform/Container.class b/tests/test_data/std/jdk/internal/platform/Container.class
new file mode 100644
index 0000000000000000000000000000000000000000..f1fdb52b67603bff850dc6fc8a356289cec57594
GIT binary patch
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/platform/Container.java b/tests/test_data/std/jdk/internal/platform/Container.java
new file mode 100644
index 00000000..9373abc3
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/platform/Container.java
@@ -0,0 +1,45 @@
+/*
+ * Copyright (c) 2018, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package jdk.internal.platform;
+
+/*
+ * @author bobv
+ * @since 11
+ */
+
+public class Container {
+
+    private Container() { }
+
+    /**
+     * Returns the platform specific Container Metrics class or
+     * null if not supported on this platform.
+     *
+     * @return Metrics instance or null if not supported
+     */
+    public static Metrics metrics() {
+        return Metrics.systemMetrics();
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/platform/Metrics.class b/tests/test_data/std/jdk/internal/platform/Metrics.class
new file mode 100644
index 0000000000000000000000000000000000000000..b7f2d1c1ea2cd3a2b6e26f790fa342a4168b2e96
GIT binary patch
literal 1067
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zFH-bhV{{vKG<;L~@|eqny4kRt*psQm_H*G%NP}qVOr&j8r(S1q_?b`X@IN~F=dD9E
zGGwk}kuw?Reg1|1G+YFQ*22bM(|MCzoScS2&txQMUK{yU8PlzYs?d=*miE>(=!zcN
z%Yv7`1~>7e0N6sVz!IRNT(MI1z5)A+Z<snh?JmG852t}90I~(ECD&lRWSiC-#7*KI
z;$7lB;(g)+;udim9+vfXh>wW7#K+{@BkmIqh);-5i5+5>_>B0R_`(u@-AjBfz~OHU
CNC;#A

literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/platform/Metrics.java b/tests/test_data/std/jdk/internal/platform/Metrics.java
new file mode 100644
index 00000000..50523d13
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/platform/Metrics.java
@@ -0,0 +1,399 @@
+/*
+ * Copyright (c) 2018, 2021, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package jdk.internal.platform;
+
+import java.lang.reflect.Method;
+
+/**
+ * Operating System Metrics class
+ *
+ * @implNote Some of the APIs within this class return metrics for an
+ * "Isolation Group" or "Container".  When the term "Isolation Group"
+ * is used in the API description, this refers to either:
+ *
+ *<ol>
+ *<li> All processes, including the current process within a container.
+ *
+ *<li> All processes, including the current process running together
+ *    isolated from other non-isolated processes.
+ *
+ *<li> All processes running on a host when that there is no isolation
+ *     in effect.
+ *</ol>
+ *
+ * @author bobv
+ * @since 11
+ */
+
+public interface Metrics {
+
+    /**
+     * Returns an instance of the Metrics class.
+     *
+     * @return Metrics object or null if not supported on this platform.
+     */
+    public static Metrics systemMetrics() {
+        return SystemMetrics.instance();
+    }
+
+    /**
+     * Returns the interface responsible for providing the
+     * platform metrics.
+     *
+     * @implNote
+     * Metrics are currently only supported Linux.
+     * The provider for Linux is cgroups (version 1 or 2).
+     *
+     * @return The name of the provider.
+     *
+     */
+    public String getProvider();
+
+
+    /* ***************************************************************
+     * CPU Accounting Subsystem
+     ****************************************************************/
+
+    /**
+     * Returns the aggregate time, in nanoseconds, consumed by all
+     * tasks in the Isolation Group.
+     *
+     * @return Time in nanoseconds, -1 if unknown or
+     *         -2 if the metric is not supported.
+     *
+     */
+    public long getCpuUsage();
+
+    /**
+     * Returns the aggregate time, in nanoseconds, consumed by all tasks in
+     * the Isolation Group, separated by CPU. If the current process
+     * is running within a container, the reported time will only be
+     * valid for processes running within the same container.  The values
+     * are returned in an array, one entry for each physical processor
+     * on the system.  Time values for processors unavailable to this
+     * Group are undefined.
+     *
+     * @return long array of time values.  The size of the array is equal
+     *         to the total number of physical processors in the system. If
+     *         this metric is not supported or not available, null will be
+     *         returned.
+     *
+     */
+    public long[] getPerCpuUsage();
+
+    /**
+     * Returns the aggregate user time, in nanoseconds, consumed by all
+     * tasks in the Isolation Group.
+     *
+     * @return User time in nanoseconds, -1 if the metric is not available or
+     *         -2 if the metric is not supported.
+     *
+     */
+    public long getCpuUserUsage();
+
+    /**
+     * Returns the aggregate system time, in nanoseconds, consumed by
+     * all tasks in the Isolation Group.
+     *
+     * @return System time in nanoseconds, -1 if the metric is not available or
+     *         -2 if the metric is not supported.
+     *
+     */
+    public long getCpuSystemUsage();
+
+    /* ***************************************************************
+     * CPU Scheduling Metrics
+     ****************************************************************/
+
+    /**
+     * Returns the length of the scheduling period, in
+     * microseconds, for processes within the Isolation Group.
+     *
+     * @return time in microseconds, -1 if the metric is not available or
+     *         -2 if the metric is not supported.
+     *
+     */
+    public long getCpuPeriod();
+
+    /**
+     * Returns the total available run-time allowed, in microseconds,
+     * during each scheduling period for all tasks in the Isolation
+     * Group.
+     *
+     * @return time in microseconds, -1 if the quota is unlimited or
+     *         -2 if not supported.
+     *
+     */
+    public long getCpuQuota();
+
+
+    /**
+     * Returns the relative weighting of processes with the Isolation
+     * Group used for prioritizing the scheduling of processes across
+     * all Isolation Groups running on a host.
+     *
+     * @implNote
+     * Popular container orchestration systems have standardized shares
+     * to be multiples of 1024, where 1024 is interpreted as 1 CPU share
+     * of execution.  Users can distribute CPU resources to multiple
+     * Isolation Groups by specifying the CPU share weighting needed by
+     * each process.  To request 2 CPUS worth of execution time, CPU shares
+     * would be set to 2048.
+     *
+     * @return shares value, -1 if the metric is not available or
+     *         -2 if cpu shares are not supported.
+     *
+     */
+    public long getCpuShares();
+
+    /**
+     * Returns the number of time-slice periods that have elapsed if
+     * a CPU quota has been setup for the Isolation Group
+     *
+     * @return count of elapsed periods, -1 if the metric is not available
+     *         or -2 if the metric is not supported.
+     *
+     */
+    public long getCpuNumPeriods();
+
+    /**
+     * Returns the number of time-slice periods that the group has
+     * been throttled or limited due to the group exceeding its quota
+     * if a CPU quota has been setup for the Isolation Group.
+     *
+     * @return count of throttled periods, -1 if the metric is not available or
+     *         -2 if it is not supported.
+     *
+     */
+    public long getCpuNumThrottled();
+
+    /**
+     * Returns the total time duration, in nanoseconds, that the
+     * group has been throttled or limited due to the group exceeding
+     * its quota if a CPU quota has been setup for the Isolation Group.
+     *
+     * @return Throttled time in nanoseconds, -1 if the metric is not available
+     *         or -2 if it is not supported.
+     *
+     */
+    public long getCpuThrottledTime();
+
+
+    /**
+     * Returns the number of effective processors that this Isolation
+     * group has available to it.  This effective processor count is
+     * computed based on the number of dedicated CPUs, CPU shares and
+     * CPU quotas in effect for this isolation group.
+     *
+     * This method returns the same value as
+     * {@link java.lang.Runtime#availableProcessors()}.
+     *
+     * @return The number of effective CPUs.
+     *
+     */
+    public long getEffectiveCpuCount();
+
+    /* ***************************************************************
+     * CPU Sets
+     ****************************************************************/
+
+    /**
+     * Returns the CPUS that are available for execution of processes
+     * in the current Isolation Group. The size of the array is equal
+     * to the total number of CPUs and the elements in the array are the
+     * physical CPU numbers that are available.  Some of the CPUs returned
+     * may be offline.  To get the current online CPUs, use
+     * {@link getEffectiveCpuSetCpus()}.
+     *
+     * @return An array of available CPUs. Returns null if the metric is not
+     *         available or the metric is not supported.
+     *
+     */
+    public int[] getCpuSetCpus();
+
+    /**
+     * Returns the CPUS that are available and online for execution of
+     * processes within the current Isolation Group. The size of the
+     * array is equal to the total number of CPUs and the elements in
+     * the array are the physical CPU numbers.
+     *
+     * @return An array of available and online CPUs. Returns null
+     *         if the metric is not available or the metric is not supported.
+     *
+     */
+    public int[] getEffectiveCpuSetCpus();
+
+    /**
+     * Returns the memory nodes that are available for use by processes
+     * in the current Isolation Group. The size of the array is equal
+     * to the total number of nodes and the elements in the array are the
+     * physical node numbers that are available.  Some of the nodes returned
+     * may be offline.  To get the current online memory nodes, use
+     * {@link getEffectiveCpuSetMems()}.
+     *
+     * @return An array of available memory nodes or null
+     *         if the metric is not available or is not supported.
+     *
+     */
+    public int[] getCpuSetMems();
+
+    /**
+     * Returns the memory nodes that are available and online for use by
+     * processes within the current Isolation Group. The size of the
+     * array is equal to the total number of nodes and the elements in
+     * the array are the physical node numbers.
+     *
+     * @return An array of available and online nodes or null
+     *         if the metric is not available or is not supported.
+     *
+     */
+    public int[] getEffectiveCpuSetMems();
+
+    /* ***************************************************************
+     * Memory Subsystem
+     ****************************************************************/
+
+    /**
+     * Returns the number of times that user memory requests in the
+     * Isolation Group have exceeded the memory limit.
+     *
+     * @return The number of exceeded requests or -1 if the metric
+     *         is not available. Returns -2 if the metric is not
+     *         supported.
+     *
+     */
+    public long getMemoryFailCount();
+
+    /**
+     * Returns the maximum amount of physical memory, in bytes, that
+     * can be allocated in the Isolation Group.
+     *
+     * @return The maximum amount of memory in bytes or -1 if
+     *         there is no limit or -2 if this metric is not supported.
+     *
+     */
+    public long getMemoryLimit();
+
+    /**
+     * Returns the amount of physical memory, in bytes, that is currently
+     * allocated in the current Isolation Group.
+     *
+     * @return The amount of memory in bytes allocated or -1 if
+     *         the metric is not available or -2 if the metric is not
+     *         supported.
+     *
+     */
+    public long getMemoryUsage();
+
+    /**
+     * Returns the amount of networking physical memory, in bytes, that
+     * is currently allocated in the current Isolation Group.
+     *
+     * @return The amount of memory in bytes allocated or -1 if the metric
+     *         is not available. Returns -2 if this metric is not supported.
+     *
+     */
+    public long getTcpMemoryUsage();
+
+    /**
+     * Returns the maximum amount of physical memory and swap space,
+     * in bytes, that can be allocated in the Isolation Group.
+     *
+     * @return The maximum amount of memory in bytes or -1 if
+     *         there is no limit set or -2 if this metric is not supported.
+     *
+     */
+    public long getMemoryAndSwapLimit();
+
+    /**
+     * Returns the amount of physical memory and swap space, in bytes,
+     * that is currently allocated in the current Isolation Group.
+     *
+     * @return The amount of memory in bytes allocated or -1 if
+     *         the metric is not available. Returns -2 if this metric is not
+     *         supported.
+     *
+     */
+    public long getMemoryAndSwapUsage();
+
+    /**
+     * Returns the hint to the operating system that allows groups
+     * to specify the minimum amount of physical memory that they need to
+     * achieve reasonable performance in low memory systems.  This allows
+     * host systems to provide greater sharing of memory.
+     *
+     * @return The minimum amount of physical memory, in bytes, that the
+     *         operating system will try to maintain under low memory
+     *         conditions.  If this metric is not available, -1 will be
+     *         returned. Returns -2 if the metric is not supported.
+     *
+     */
+    public long getMemorySoftLimit();
+
+    /* ***************************************************************
+     * pids subsystem
+     ****************************************************************/
+
+    /**
+     * Returns the maximum number of tasks that may be created in the Isolation Group.
+     *
+     * @return The maximum number of tasks, -1 if the quota is unlimited or
+     *         -2 if not supported.
+     *
+     */
+    public long getPidsMax();
+
+    /**
+     * Returns the current number of tasks in the Isolation Group.
+     *
+     * @return The current number of tasks or -2 if not supported
+     *
+     */
+    public long getPidsCurrent();
+
+    /* ***************************************************************
+     * BlKIO Subsystem
+     ****************************************************************/
+
+    /**
+     * Returns the number of block I/O requests to the disk that have been
+     * issued by the Isolation Group.
+     *
+     * @return The count of requests or -1 if the metric is not available.
+     *         Returns -2 if this metric is not supported.
+     *
+     */
+    public long getBlkIOServiceCount();
+
+    /**
+     * Returns the number of block I/O bytes that have been transferred
+     * to/from the disk by the Isolation Group.
+     *
+     * @return The number of bytes transferred or -1 if the metric is not
+     *         available. Returns -2 if this metric is not supported.
+     *
+     */
+    public long getBlkIOServiced();
+}
diff --git a/tests/test_data/std/jdk/internal/platform/SystemMetrics.class b/tests/test_data/std/jdk/internal/platform/SystemMetrics.class
new file mode 100644
index 0000000000000000000000000000000000000000..92bdd1155c38615aa3faff6e11c3643a2e0c9a72
GIT binary patch
literal 395
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zkXC!XO@{7Kv*;xGhxa+5t4-~s$=Gf@nf@W#uEOo{yjs~zUFl~2uSL)Nk1<BXhwv`|
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HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/platform/SystemMetrics.java b/tests/test_data/std/jdk/internal/platform/SystemMetrics.java
new file mode 100644
index 00000000..b14b7e51
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/platform/SystemMetrics.java
@@ -0,0 +1,31 @@
+/*
+ * Copyright (c) 2021, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package jdk.internal.platform;
+
+public class SystemMetrics {
+    public static Metrics instance() {
+        return null;
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/random/L128X1024MixRandom.class b/tests/test_data/std/jdk/internal/random/L128X1024MixRandom.class
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diff --git a/tests/test_data/std/jdk/internal/random/L128X1024MixRandom.java b/tests/test_data/std/jdk/internal/random/L128X1024MixRandom.java
new file mode 100644
index 00000000..4af9ecc3
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/random/L128X1024MixRandom.java
@@ -0,0 +1,331 @@
+/*
+ * Copyright (c) 2021, 2024, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package jdk.internal.random;
+
+import java.util.concurrent.atomic.AtomicLong;
+import java.util.random.RandomGenerator;
+import jdk.internal.util.random.RandomSupport;
+import jdk.internal.util.random.RandomSupport.AbstractSplittableWithBrineGenerator;
+
+/**
+ * A "splittable" pseudorandom number generator (PRNG) whose period
+ * is roughly 2<sup>1152</sup>.  Class {@link L128X1024MixRandom} implements
+ * interfaces {@link RandomGenerator} and {@link SplittableGenerator},
+ * and therefore supports methods for producing pseudorandomly chosen
+ * values of type {@code int}, {@code long}, {@code float}, {@code double},
+ * and {@code boolean} (and for producing streams of pseudorandomly chosen
+ * numbers of type {@code int}, {@code long}, and {@code double}),
+ * as well as methods for creating new split-off {@link L128X1024MixRandom}
+ * objects or streams of such objects.
+ *
+ * <p>The {@link L128X1024MixRandom} algorithm is a specific member of
+ * the LXM family of algorithms for pseudorandom number generators;
+ * for more information, see the documentation for package
+ * {@link jdk.random}.  Each instance of {@link L128X1024MixRandom}
+ * has 1152 bits of state plus one 128-bit instance-specific parameter.
+ *
+ * <p>If two instances of {@link L128X1024MixRandom} are created with
+ * the same seed within the same program execution, and the same
+ * sequence of method calls is made for each, they will generate and
+ * return identical sequences of values.
+ *
+ * <p>As with {@link java.util.SplittableRandom}, instances of
+ * {@link L128X1024MixRandom} are <em>not</em> thread-safe.  They are
+ * designed to be split, not shared, across threads (see the {@link #split}
+ * method). For example, a {@link java.util.concurrent.ForkJoinTask}
+ * fork/join-style computation using random numbers might include a
+ * construction of the form
+ * {@code new Subtask(someL128X1024MixRandom.split()).fork()}.
+ *
+ * <p>This class provides additional methods for generating random
+ * streams, that employ the above techniques when used in
+ * {@code stream.parallel()} mode.
+ *
+ * <p>Instances of {@link L128X1024MixRandom} are not cryptographically
+ * secure.  Consider instead using {@link java.security.SecureRandom}
+ * in security-sensitive applications. Additionally,
+ * default-constructed instances do not use a cryptographically random
+ * seed unless the {@linkplain System#getProperty system property}
+ * {@code java.util.secureRandomSeed} is set to {@code true}.
+ *
+ * @since   17
+ *
+ */
+public final class L128X1024MixRandom extends AbstractSplittableWithBrineGenerator {
+
+    /*
+     * Implementation Overview.
+     *
+     * The 128-bit parameter `a` is represented as two long fields `ah` and `al`.
+     * The 128-bit state variable `s` is represented as two long fields `sh` and `sl`.
+     *
+     * The split operation uses the current generator to choose 20
+     * new 64-bit long values that are then used to initialize the
+     * parameters `ah` and `al`, the state variables `sh`, `sl`,
+     * and the array `x` for a newly constructed generator.
+     *
+     * With extremely high probability, no two generators so chosen
+     * will have the same `a` parameter, and testing has indicated
+     * that the values generated by two instances of {@link L128X1024MixRandom}
+     * will be (approximately) independent if have different values for `a`.
+     *
+     * The default (no-argument) constructor, in essence, uses
+     * "defaultGen" to generate 20 new 64-bit values for the same
+     * purpose.  Multiple generators created in this way will certainly
+     * differ in their `a` parameters.  The defaultGen state must be accessed
+     * in a thread-safe manner, so we use an AtomicLong to represent
+     * this state.  To bootstrap the defaultGen, we start off using a
+     * seed based on current time unless the
+     * java.util.secureRandomSeed property is set. This serves as a
+     * slimmed-down (and insecure) variant of SecureRandom that also
+     * avoids stalls that may occur when using /dev/random.
+     *
+     * File organization: First static fields, then instance
+     * fields, then constructors, then instance methods.
+     */
+
+    /* ---------------- static fields ---------------- */
+
+    /*
+     * The length of the array x.
+     */
+
+    private static final int N = 16;
+
+    /**
+     * The seed generator for default constructors.
+     */
+    private static final AtomicLong defaultGen = new AtomicLong(RandomSupport.initialSeed());
+
+    /*
+     * Low half of multiplier used in the LCG portion of the algorithm;
+     * the overall multiplier is (2**64 + ML).
+     * Chosen based on research by Sebastiano Vigna and Guy Steele (2019).
+     * The spectral scores for dimensions 2 through 8 for the multiplier 0x1d605bbb58c8abbfdLL
+     * are [0.991889, 0.907938, 0.830964, 0.837980, 0.780378, 0.797464, 0.761493].
+     */
+
+    private static final long ML = 0xd605bbb58c8abbfdL;
+
+    /* ---------------- instance fields ---------------- */
+
+    /**
+     * The parameter that is used as an additive constant for the LCG.
+     * Must be odd (therefore al must be odd).
+     */
+    private final long ah, al;
+
+    /**
+     * The per-instance state: sh and sl for the LCG; the array x for the XBG;
+     * p is the rotating pointer into the array x.
+     * At least one of the 16 elements of the array x must be nonzero.
+     */
+    private long sh, sl;
+    private final long[] x;
+    private int p = N - 1;
+
+    /* ---------------- constructors ---------------- */
+
+    /**
+     * Basic constructor that initializes all fields from parameters.
+     * It then adjusts the field values if necessary to ensure that
+     * all constraints on the values of fields are met.
+     *
+     * @param ah high half of the additive parameter for the LCG
+     * @param al low half of the additive parameter for the LCG
+     * @param sh high half of the initial state for the LCG
+     * @param sl low half of the initial state for the LCG
+     * @param x0 first word of the initial state for the XBG
+     * @param x1 second word of the initial state for the XBG
+     * @param x2 third word of the initial state for the XBG
+     * @param x3 fourth word of the initial state for the XBG
+     * @param x4 fifth word of the initial state for the XBG
+     * @param x5 sixth word of the initial state for the XBG
+     * @param x6 seventh word of the initial state for the XBG
+     * @param x7 eight word of the initial state for the XBG
+     * @param x8 ninth word of the initial state for the XBG
+     * @param x9 tenth word of the initial state for the XBG
+     * @param x10 eleventh word of the initial state for the XBG
+     * @param x11 twelfth word of the initial state for the XBG
+     * @param x12 thirteenth word of the initial state for the XBG
+     * @param x13 fourteenth word of the initial state for the XBG
+     * @param x14 fifteenth word of the initial state for the XBG
+     * @param x15 sixteenth word of the initial state for the XBG
+     */
+    public L128X1024MixRandom(long ah, long al, long sh, long sl,
+                 long x0, long x1, long x2, long x3,
+                 long x4, long x5, long x6, long x7,
+                 long x8, long x9, long x10, long x11,
+                 long x12, long x13, long x14, long x15) {
+        // Force a to be odd.
+   this.ah = ah;
+        this.al = al | 1;
+        this.sh = sh;
+        this.sl = sl;
+        this.x = new long[N];
+        this.x[0] = x0;
+        this.x[1] = x1;
+        this.x[2] = x2;
+        this.x[3] = x3;
+        this.x[4] = x4;
+        this.x[5] = x5;
+        this.x[6] = x6;
+        this.x[7] = x7;
+        this.x[8] = x8;
+        this.x[9] = x9;
+        this.x[10] = x10;
+        this.x[11] = x11;
+        this.x[12] = x12;
+        this.x[13] = x13;
+        this.x[14] = x14;
+        this.x[15] = x15;
+        // If x0, x1, ..., x15 are all zero (very unlikely), we must choose nonzero values.
+        if ((x0 | x1 | x2 | x3 | x4 | x5 | x6 | x7 | x8 | x9 | x10 | x11 | x12 | x13 | x14 | x15) == 0) {
+       long v = sh;
+            // At least fifteen of the sixteen values generated here will be nonzero.
+            for (int j = 0; j < N; j++) {
+                this.x[j] = RandomSupport.mixStafford13(v += RandomSupport.GOLDEN_RATIO_64);
+            }
+        }
+    }
+
+    /**
+     * Creates a new instance of {@link L128X1024MixRandom} using the
+     * specified {@code long} value as the initial seed. Instances of
+     * {@link L128X1024MixRandom} created with the same seed in the same
+     * program execution generate identical sequences of values.
+     *
+     * @param seed the initial seed
+     */
+    public L128X1024MixRandom(long seed) {
+        // Using a value with irregularly spaced 1-bits to xor the seed
+        // argument tends to improve "pedestrian" seeds such as 0 or
+        // other small integers.  We may as well use SILVER_RATIO_64.
+        //
+        // The seed is hashed by mixMurmur64 to produce the `a` parameter.
+        // The seed is hashed by mixStafford13 to produce the initial `x[0]`,
+        // which will then be used to produce the first generated value.
+        // The other x values are filled in as if by a SplitMix PRNG with
+        // GOLDEN_RATIO_64 as the gamma value and mixStafford13 as the mixer.
+        this(RandomSupport.mixMurmur64(seed ^= RandomSupport.SILVER_RATIO_64),
+             RandomSupport.mixMurmur64(seed += RandomSupport.GOLDEN_RATIO_64),
+             0,
+             1,
+             RandomSupport.mixStafford13(seed),
+             RandomSupport.mixStafford13(seed += RandomSupport.GOLDEN_RATIO_64),
+             RandomSupport.mixStafford13(seed += RandomSupport.GOLDEN_RATIO_64),
+             RandomSupport.mixStafford13(seed += RandomSupport.GOLDEN_RATIO_64),
+             RandomSupport.mixStafford13(seed += RandomSupport.GOLDEN_RATIO_64),
+             RandomSupport.mixStafford13(seed += RandomSupport.GOLDEN_RATIO_64),
+             RandomSupport.mixStafford13(seed += RandomSupport.GOLDEN_RATIO_64),
+             RandomSupport.mixStafford13(seed += RandomSupport.GOLDEN_RATIO_64),
+             RandomSupport.mixStafford13(seed += RandomSupport.GOLDEN_RATIO_64),
+             RandomSupport.mixStafford13(seed += RandomSupport.GOLDEN_RATIO_64),
+             RandomSupport.mixStafford13(seed += RandomSupport.GOLDEN_RATIO_64),
+             RandomSupport.mixStafford13(seed += RandomSupport.GOLDEN_RATIO_64),
+             RandomSupport.mixStafford13(seed += RandomSupport.GOLDEN_RATIO_64),
+             RandomSupport.mixStafford13(seed += RandomSupport.GOLDEN_RATIO_64),
+             RandomSupport.mixStafford13(seed += RandomSupport.GOLDEN_RATIO_64),
+             RandomSupport.mixStafford13(seed + RandomSupport.GOLDEN_RATIO_64));
+    }
+
+    /**
+     * Creates a new instance of {@link L128X1024MixRandom} that is likely to
+     * generate sequences of values that are statistically independent
+     * of those of any other instances in the current program execution,
+     * but may, and typically does, vary across program invocations.
+     */
+    public L128X1024MixRandom() {
+        // Using GOLDEN_RATIO_64 here gives us a good Weyl sequence of values.
+        this(defaultGen.getAndAdd(RandomSupport.GOLDEN_RATIO_64));
+    }
+
+    /**
+     * Creates a new instance of {@link L128X1024MixRandom} using the specified array of
+     * initial seed bytes. Instances of {@link L128X1024MixRandom} created with the same
+     * seed array in the same program execution generate identical sequences of values.
+     *
+     * @param seed the initial seed
+     */
+    public L128X1024MixRandom(byte[] seed) {
+        // Convert the seed to 20 long values, of which the last 16 are not all zero.
+        long[] data = RandomSupport.convertSeedBytesToLongs(seed, 20, 16);
+   long ah = data[0], al = data[1], sh = data[2], sl = data[3];
+        // Force a to be odd.
+        this.ah = ah;
+        this.al = al | 1;
+        this.sh = sh;
+        this.sl = sl;
+        this.x = new long[N];
+        for (int j = 0; j < N; j++) {
+            this.x[j] = data[4+j];
+        }
+    }
+
+    /* ---------------- public methods ---------------- */
+
+    @Override
+    public SplittableGenerator split(SplittableGenerator source, long brine) {
+       // Pick a new instance "at random", but use the brine for (the low half of) `a`.
+        return new L128X1024MixRandom(source.nextLong(), brine << 1,
+                     source.nextLong(), source.nextLong(),
+                     source.nextLong(), source.nextLong(),
+                     source.nextLong(), source.nextLong(),
+                     source.nextLong(), source.nextLong(),
+                     source.nextLong(), source.nextLong(),
+                     source.nextLong(), source.nextLong(),
+                     source.nextLong(), source.nextLong(),
+                     source.nextLong(), source.nextLong(),
+                     source.nextLong(), source.nextLong());
+    }
+
+    @Override
+    public long nextLong() {
+        // First part of xoroshiro1024: fetch array data
+        final int q = p;
+        final long s0 = x[p = (p + 1) & (N - 1)];
+        long s15 = x[q];
+
+       // Compute the result based on current state information
+       // (this allows the computation to be overlapped with state update).
+        final long result = RandomSupport.mixLea64(sh + s0);
+
+       // Update the LCG subgenerator
+        // The LCG is, in effect, s = ((1LL << 64) + ML) * s + a, if only we had 128-bit arithmetic.
+        final long u = ML * sl;
+        sh = (ML * sh) + Math.unsignedMultiplyHigh(ML, sl) + sl + ah;
+        sl = u + al;
+        if (Long.compareUnsigned(sl, u) < 0) ++sh;  // Handle the carry propagation from low half to high half.
+
+        // Second part of xoroshiro1024: update array data
+        s15 ^= s0;
+        x[q] = Long.rotateLeft(s0, 25) ^ s15 ^ (s15 << 27);
+        x[p] = Long.rotateLeft(s15, 36);
+
+        return result;
+    }
+
+}
diff --git a/tests/test_data/std/jdk/internal/random/L128X128MixRandom.class b/tests/test_data/std/jdk/internal/random/L128X128MixRandom.class
new file mode 100644
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diff --git a/tests/test_data/std/jdk/internal/random/L128X128MixRandom.java b/tests/test_data/std/jdk/internal/random/L128X128MixRandom.java
new file mode 100644
index 00000000..1323139e
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/random/L128X128MixRandom.java
@@ -0,0 +1,261 @@
+/*
+ * Copyright (c) 2021, 2024, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package jdk.internal.random;
+
+import java.util.concurrent.atomic.AtomicLong;
+import java.util.random.RandomGenerator;
+import jdk.internal.util.random.RandomSupport;
+import jdk.internal.util.random.RandomSupport.AbstractSplittableWithBrineGenerator;
+
+/**
+ * A "splittable" pseudorandom number generator (PRNG) whose period
+ * is roughly 2<sup>256</sup>.  Class {@link L128X128MixRandom} implements
+ * interfaces {@link RandomGenerator} and {@link SplittableGenerator},
+ * and therefore supports methods for producing pseudorandomly chosen
+ * values of type {@code int}, {@code long}, {@code float}, {@code double},
+ * and {@code boolean} (and for producing streams of pseudorandomly chosen
+ * numbers of type {@code int}, {@code long}, and {@code double}),
+ * as well as methods for creating new split-off {@link L128X128MixRandom}
+ * objects or streams of such objects.
+ *
+ * <p>The {@link L128X128MixRandom} algorithm is a specific member of
+ * the LXM family of algorithms for pseudorandom number generators;
+ * for more information, see the documentation for package
+ * {@link jdk.random}.  Each instance of {@link L128X128MixRandom}
+ * has 256 bits of state plus one 128-bit instance-specific parameter.
+ *
+ * <p>If two instances of {@link L128X128MixRandom} are created with
+ * the same seed within the same program execution, and the same
+ * sequence of method calls is made for each, they will generate and
+ * return identical sequences of values.
+ *
+ * <p>As with {@link java.util.SplittableRandom}, instances of
+ * {@link L128X128MixRandom} are <em>not</em> thread-safe.  They are
+ * designed to be split, not shared, across threads (see the {@link #split}
+ * method). For example, a {@link java.util.concurrent.ForkJoinTask}
+ * fork/join-style computation using random numbers might include a
+ * construction of the form
+ * {@code new Subtask(someL128X128MixRandom.split()).fork()}.
+ *
+ * <p>This class provides additional methods for generating random
+ * streams, that employ the above techniques when used in
+ * {@code stream.parallel()} mode.
+ *
+ * <p>Instances of {@link L128X128MixRandom} are not cryptographically
+ * secure.  Consider instead using {@link java.security.SecureRandom}
+ * in security-sensitive applications. Additionally,
+ * default-constructed instances do not use a cryptographically random
+ * seed unless the {@linkplain System#getProperty system property}
+ * {@code java.util.secureRandomSeed} is set to {@code true}.
+ *
+ * @since   17
+ *
+ */
+public final class L128X128MixRandom extends AbstractSplittableWithBrineGenerator {
+
+    /*
+     * Implementation Overview.
+     *
+     * The split operation uses the current generator to choose four new 64-bit
+     * long values that are then used to initialize the parameter `a` and the
+     * state variables `s`, `x0`, and `x1` for a newly constructed generator.
+     *
+     * With extremely high probability, no two generators so chosen
+     * will have the same `a` parameter, and testing has indicated
+     * that the values generated by two instances of {@link L128X128MixRandom}
+     * will be (approximately) independent if have different values for `a`.
+     *
+     * The default (no-argument) constructor, in essence, uses
+     * "defaultGen" to generate four new 64-bit values for the same
+     * purpose.  Multiple generators created in this way will certainly
+     * differ in their `a` parameters.  The defaultGen state must be accessed
+     * in a thread-safe manner, so we use an AtomicLong to represent
+     * this state.  To bootstrap the defaultGen, we start off using a
+     * seed based on current time unless the
+     * java.util.secureRandomSeed property is set. This serves as a
+     * slimmed-down (and insecure) variant of SecureRandom that also
+     * avoids stalls that may occur when using /dev/random.
+     *
+     * File organization: First static fields, then instance
+     * fields, then constructors, then instance methods.
+     */
+
+    /* ---------------- static fields ---------------- */
+
+    /**
+     * The seed generator for default constructors.
+     */
+    private static final AtomicLong defaultGen = new AtomicLong(RandomSupport.initialSeed());
+
+    /*
+     * Low half of multiplier used in the LCG portion of the algorithm;
+     * the overall multiplier is (2**64 + ML).
+     * Chosen based on research by Sebastiano Vigna and Guy Steele (2019).
+     * The spectral scores for dimensions 2 through 8 for the multiplier 0x1d605bbb58c8abbfdLL
+     * are [0.991889, 0.907938, 0.830964, 0.837980, 0.780378, 0.797464, 0.761493].
+     */
+
+    private static final long ML = 0xd605bbb58c8abbfdL;
+
+    /* ---------------- instance fields ---------------- */
+
+    /**
+     * The parameter that is used as an additive constant for the LCG.
+     * Must be odd (therefore al must be odd).
+     */
+    private final long ah, al;
+
+    /**
+     * The per-instance state: sh and sl for the LCG; x0 and x1 for the XBG.
+     * At least one of x0 and x1 must be nonzero.
+     */
+    private long sh, sl, x0, x1;
+
+    /* ---------------- constructors ---------------- */
+
+    /**
+     * Basic constructor that initializes all fields from parameters.
+     * It then adjusts the field values if necessary to ensure that
+     * all constraints on the values of fields are met.
+     *
+     * @param ah high half of the additive parameter for the LCG
+     * @param al low half of the additive parameter for the LCG
+     * @param sh high half of the initial state for the LCG
+     * @param sl low half of the initial state for the LCG
+     * @param x0 first word of the initial state for the XBG
+     * @param x1 second word of the initial state for the XBG
+     */
+    public L128X128MixRandom(long ah, long al, long sh, long sl, long x0, long x1) {
+        // Force a to be odd.
+        this.ah = ah;
+        this.al = al | 1;
+        this.sh = sh;
+        this.sl = sl;
+        this.x0 = x0;
+        this.x1 = x1;
+        // If x0 and x1 are both zero, we must choose nonzero values.
+        if ((x0 | x1) == 0) {
+       long v = sh;
+            // At least one of the two values generated here will be nonzero.
+            this.x0 = RandomSupport.mixStafford13(v += RandomSupport.GOLDEN_RATIO_64);
+            this.x1 = RandomSupport.mixStafford13(v + RandomSupport.GOLDEN_RATIO_64);
+        }
+    }
+
+    /**
+     * Creates a new instance of {@link L128X128MixRandom} using the
+     * specified {@code long} value as the initial seed. Instances of
+     * {@link L128X128MixRandom} created with the same seed in the same
+     * program generate identical sequences of values.
+     *
+     * @param seed the initial seed
+     */
+    public L128X128MixRandom(long seed) {
+        // Using a value with irregularly spaced 1-bits to xor the seed
+        // argument tends to improve "pedestrian" seeds such as 0 or
+        // other small integers.  We may as well use SILVER_RATIO_64.
+        //
+        // The seed is hashed by mixMurmur64 to produce the `a` parameter.
+        // The seed is hashed by mixStafford13 to produce the initial `x0`,
+        // which will then be used to produce the first generated value.
+        // Then x1 is filled in as if by a SplitMix PRNG with
+        // GOLDEN_RATIO_64 as the gamma value and mixStafford13 as the mixer.
+        this(RandomSupport.mixMurmur64(seed ^= RandomSupport.SILVER_RATIO_64),
+             RandomSupport.mixMurmur64(seed += RandomSupport.GOLDEN_RATIO_64),
+             0,
+             1,
+             RandomSupport.mixStafford13(seed),
+             RandomSupport.mixStafford13(seed + RandomSupport.GOLDEN_RATIO_64));
+    }
+
+    /**
+     * Creates a new instance of {@link L128X128MixRandom} that is likely to
+     * generate sequences of values that are statistically independent
+     * of those of any other instances in the current program execution,
+     * but may, and typically does, vary across program invocations.
+     */
+    public L128X128MixRandom() {
+        // Using GOLDEN_RATIO_64 here gives us a good Weyl sequence of values.
+        this(defaultGen.getAndAdd(RandomSupport.GOLDEN_RATIO_64));
+    }
+
+    /**
+     * Creates a new instance of {@link L128X128MixRandom} using the specified array of
+     * initial seed bytes. Instances of {@link L128X128MixRandom} created with the same
+     * seed array in the same program execution generate identical sequences of values.
+     *
+     * @param seed the initial seed
+     */
+    public L128X128MixRandom(byte[] seed) {
+        // Convert the seed to 6 long values, of which the last 2 are not all zero.
+        long[] data = RandomSupport.convertSeedBytesToLongs(seed, 6, 2);
+        long ah = data[0], al = data[1], sh = data[2], sl = data[3], x0 = data[4], x1 = data[5];
+        // Force a to be odd.
+        this.ah = ah;
+        this.al = al | 1;
+        this.sh = sh;
+        this.sl = sl;
+        this.x0 = x0;
+        this.x1 = x1;
+    }
+
+    /* ---------------- public methods ---------------- */
+
+    @Override
+    public SplittableGenerator split(SplittableGenerator source, long brine) {
+       // Pick a new instance "at random", but use the brine for (the low half of) `a`.
+        return new L128X128MixRandom(source.nextLong(), brine << 1,
+                    source.nextLong(), source.nextLong(),
+                    source.nextLong(), source.nextLong());
+    }
+
+    @Override
+    public long nextLong() {
+       // Compute the result based on current state information
+       // (this allows the computation to be overlapped with state update).
+        final long result = RandomSupport.mixLea64(sh + x0);
+
+       // Update the LCG subgenerator
+        // The LCG is, in effect, s = ((1LL << 64) + ML) * s + a, if only we had 128-bit arithmetic.
+        final long u = ML * sl;
+        sh = (ML * sh) + Math.unsignedMultiplyHigh(ML, sl) + sl + ah;
+        sl = u + al;
+        if (Long.compareUnsigned(sl, u) < 0) ++sh;  // Handle the carry propagation from low half to high half.
+
+        long q0 = x0, q1 = x1;
+       // Update the XBG subgenerator
+        {   // xoroshiro128v1_0
+            q1 ^= q0;
+            q0 = Long.rotateLeft(q0, 24);
+            q0 = q0 ^ q1 ^ (q1 << 16);
+            q1 = Long.rotateLeft(q1, 37);
+        }
+        x0 = q0; x1 = q1;
+
+        return result;
+    }
+
+}
diff --git a/tests/test_data/std/jdk/internal/random/L128X256MixRandom.class b/tests/test_data/std/jdk/internal/random/L128X256MixRandom.class
new file mode 100644
index 0000000000000000000000000000000000000000..bb70729150f1dfb1a5a17fea3857421206be3dfd
GIT binary patch
literal 3135
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/random/L128X256MixRandom.java b/tests/test_data/std/jdk/internal/random/L128X256MixRandom.java
new file mode 100644
index 00000000..19fd31b0
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/random/L128X256MixRandom.java
@@ -0,0 +1,285 @@
+/*
+ * Copyright (c) 2021, 2024, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package jdk.internal.random;
+
+import java.util.concurrent.atomic.AtomicLong;
+import java.util.random.RandomGenerator;
+import jdk.internal.util.random.RandomSupport;
+import jdk.internal.util.random.RandomSupport.AbstractSplittableWithBrineGenerator;
+
+/**
+ * A "splittable" pseudorandom number generator (PRNG) whose period
+ * is roughly 2<sup>384</sup>.  Class {@link L128X256MixRandom} implements
+ * interfaces {@link RandomGenerator} and {@link SplittableGenerator},
+ * and therefore supports methods for producing pseudorandomly chosen
+ * values of type {@code int}, {@code long}, {@code float}, {@code double},
+ * and {@code boolean} (and for producing streams of pseudorandomly chosen
+ * numbers of type {@code int}, {@code long}, and {@code double}),
+ * as well as methods for creating new split-off {@link L128X256MixRandom}
+ * objects or streams of such objects.
+ *
+ * <p>The {@link L128X256MixRandom} algorithm is a specific member of
+ * the LXM family of algorithms for pseudorandom number generators;
+ * for more information, see the documentation for package
+ * {@link jdk.random}.  Each instance of {@link L128X256MixRandom}
+ * has 384 bits of state plus one 128-bit instance-specific parameter.
+ *
+ * <p>If two instances of {@link L128X256MixRandom} are created with
+ * the same seed within the same program execution, and the same
+ * sequence of method calls is made for each, they will generate and
+ * return identical sequences of values.
+ *
+ * <p>As with {@link java.util.SplittableRandom}, instances of
+ * {@link L128X256MixRandom} are <em>not</em> thread-safe.  They are
+ * designed to be split, not shared, across threads (see the {@link #split}
+ * method). For example, a {@link java.util.concurrent.ForkJoinTask}
+ * fork/join-style computation using random numbers might include a
+ * construction of the form
+ * {@code new Subtask(someL128X256MixRandom.split()).fork()}.
+ *
+ * <p>This class provides additional methods for generating random
+ * streams, that employ the above techniques when used in
+ * {@code stream.parallel()} mode.
+ *
+ * <p>Instances of {@link L128X256MixRandom} are not cryptographically
+ * secure.  Consider instead using {@link java.security.SecureRandom}
+ * in security-sensitive applications. Additionally,
+ * default-constructed instances do not use a cryptographically random
+ * seed unless the {@linkplain System#getProperty system property}
+ * {@code java.util.secureRandomSeed} is set to {@code true}.
+ *
+ * @since   17
+ *
+ */
+public final class L128X256MixRandom extends AbstractSplittableWithBrineGenerator {
+
+    /*
+     * Implementation Overview.
+     *
+     * The 128-bit parameter `a` is represented as two long fields `ah` and `al`.
+     * The 128-bit state variable `s` is represented as two long fields `sh` and `sl`.
+     *
+     * The split operation uses the current generator to choose eight
+     * new 64-bit long values that are then used to initialize the
+     * parameters `ah` and `al` and the state variables `sh`, `sl`,
+     * `x0`, `x1`, `x2`, and `x3` for a newly constructed generator.
+     *
+     * With extremely high probability, no two generators so chosen
+     * will have the same `a` parameter, and testing has indicated
+     * that the values generated by two instances of {@link L128X256MixRandom}
+     * will be (approximately) independent if have different values for `a`.
+     *
+     * The default (no-argument) constructor, in essence, uses
+     * "defaultGen" to generate eight new 64-bit values for the same
+     * purpose.  Multiple generators created in this way will certainly
+     * differ in their `a` parameters.  The defaultGen state must be accessed
+     * in a thread-safe manner, so we use an AtomicLong to represent
+     * this state.  To bootstrap the defaultGen, we start off using a
+     * seed based on current time unless the
+     * java.util.secureRandomSeed property is set. This serves as a
+     * slimmed-down (and insecure) variant of SecureRandom that also
+     * avoids stalls that may occur when using /dev/random.
+     *
+     * File organization: First static fields, then instance
+     * fields, then constructors, then instance methods.
+     */
+
+    /* ---------------- static fields ---------------- */
+
+    /**
+     * The seed generator for default constructors.
+     */
+    private static final AtomicLong defaultGen = new AtomicLong(RandomSupport.initialSeed());
+
+    /*
+     * The equidistribution of the algorithm.
+     */
+    private static final int EQUIDISTRIBUTION = 1;
+
+    /*
+     * Low half of multiplier used in the LCG portion of the algorithm;
+     * the overall multiplier is (2**64 + ML).
+     * Chosen based on research by Sebastiano Vigna and Guy Steele (2019).
+     * The spectral scores for dimensions 2 through 8 for the multiplier 0x1d605bbb58c8abbfdLL
+     * are [0.991889, 0.907938, 0.830964, 0.837980, 0.780378, 0.797464, 0.761493].
+     */
+
+    private static final long ML = 0xd605bbb58c8abbfdL;
+
+    /* ---------------- instance fields ---------------- */
+
+    /**
+     * The parameter that is used as an additive constant for the LCG.
+     * Must be odd (therefore al must be odd).
+     */
+    private final long ah, al;
+
+    /**
+     * The per-instance state: sh and sl for the LCG; x0, x1, x2, and x3 for the XBG.
+     * At least one of the four fields x0, x1, x2, and x3 must be nonzero.
+     */
+    private long sh, sl, x0, x1, x2, x3;
+
+    /* ---------------- constructors ---------------- */
+
+    /**
+     * Basic constructor that initializes all fields from parameters.
+     * It then adjusts the field values if necessary to ensure that
+     * all constraints on the values of fields are met.
+     *
+     * @param ah high half of the additive parameter for the LCG
+     * @param al low half of the additive parameter for the LCG
+     * @param sh high half of the initial state for the LCG
+     * @param sl low half of the initial state for the LCG
+     * @param x0 first word of the initial state for the XBG
+     * @param x1 second word of the initial state for the XBG
+     * @param x2 third word of the initial state for the XBG
+     * @param x3 fourth word of the initial state for the XBG
+     */
+    public L128X256MixRandom(long ah, long al, long sh, long sl, long x0, long x1, long x2, long x3) {
+        // Force a to be odd.
+        this.ah = ah;
+        this.al = al | 1;
+        this.sh = sh;
+        this.sl = sl;
+        this.x0 = x0;
+        this.x1 = x1;
+        this.x2 = x2;
+        this.x3 = x3;
+        // If x0, x1, x2, and x3 are all zero, we must choose nonzero values.
+        if ((x0 | x1 | x2 | x3) == 0) {
+            long v = sh;
+            // At least three of the four values generated here will be nonzero.
+            this.x0 = RandomSupport.mixStafford13(v += RandomSupport.GOLDEN_RATIO_64);
+            this.x1 = RandomSupport.mixStafford13(v += RandomSupport.GOLDEN_RATIO_64);
+            this.x2 = RandomSupport.mixStafford13(v += RandomSupport.GOLDEN_RATIO_64);
+            this.x3 = RandomSupport.mixStafford13(v + RandomSupport.GOLDEN_RATIO_64);
+        }
+    }
+
+    /**
+     * Creates a new instance of {@link L128X256MixRandom} using the
+     * specified {@code long} value as the initial seed. Instances of
+     * {@link L128X256MixRandom} created with the same seed in the same
+     * program generate identical sequences of values.
+     *
+     * @param seed the initial seed
+     */
+    public L128X256MixRandom(long seed) {
+        // Using a value with irregularly spaced 1-bits to xor the seed
+        // argument tends to improve "pedestrian" seeds such as 0 or
+        // other small integers.  We may as well use SILVER_RATIO_64.
+        //
+        // The seed is hashed by mixMurmur64 to produce the `a` parameter.
+        // The seed is hashed by mixStafford13 to produce the initial `x0`,
+        // which will then be used to produce the first generated value.
+        // The other x values are filled in as if by a SplitMix PRNG with
+        // GOLDEN_RATIO_64 as the gamma value and mixStafford13 as the mixer.
+        this(RandomSupport.mixMurmur64(seed ^= RandomSupport.SILVER_RATIO_64),
+             RandomSupport.mixMurmur64(seed += RandomSupport.GOLDEN_RATIO_64),
+             0,
+             1,
+             RandomSupport.mixStafford13(seed),
+             RandomSupport.mixStafford13(seed += RandomSupport.GOLDEN_RATIO_64),
+             RandomSupport.mixStafford13(seed += RandomSupport.GOLDEN_RATIO_64),
+             RandomSupport.mixStafford13(seed + RandomSupport.GOLDEN_RATIO_64));
+    }
+
+    /**
+     * Creates a new instance of {@link L128X256MixRandom} that is likely to
+     * generate sequences of values that are statistically independent
+     * of those of any other instances in the current program execution,
+     * but may, and typically does, vary across program invocations.
+     */
+    public L128X256MixRandom() {
+        // Using GOLDEN_RATIO_64 here gives us a good Weyl sequence of values.
+        this(defaultGen.getAndAdd(RandomSupport.GOLDEN_RATIO_64));
+    }
+
+    /**
+     * Creates a new instance of {@link L128X256MixRandom} using the specified array of
+     * initial seed bytes. Instances of {@link L128X256MixRandom} created with the same
+     * seed array in the same program execution generate identical sequences of values.
+     *
+     * @param seed the initial seed
+     */
+    public L128X256MixRandom(byte[] seed) {
+        // Convert the seed to 8 long values, of which the last 4 are not all zero.
+        long[] data = RandomSupport.convertSeedBytesToLongs(seed, 8, 4);
+        long ah = data[0], al = data[1], sh = data[2], sl = data[3],
+             x0 = data[4], x1 = data[5], x2 = data[6], x3 = data[7];
+        // Force a to be odd.
+        this.ah = ah;
+        this.al = al | 1;
+        this.sh = sh;
+        this.sl = sl;
+        this.x0 = x0;
+        this.x1 = x1;
+        this.x2 = x2;
+        this.x3 = x3;
+    }
+
+    /* ---------------- public methods ---------------- */
+
+    @Override
+    public SplittableGenerator split(SplittableGenerator source, long brine) {
+        // Pick a new instance "at random", but use the brine for (the low half of) `a`.
+        return new L128X256MixRandom(source.nextLong(), brine << 1,
+                    source.nextLong(), source.nextLong(),
+                    source.nextLong(), source.nextLong(),
+                    source.nextLong(), source.nextLong());
+    }
+
+    @Override
+    public long nextLong() {
+        // Compute the result based on current state information
+        // (this allows the computation to be overlapped with state update).
+        final long result = RandomSupport.mixLea64(sh + x0);
+
+        // Update the LCG subgenerator
+        // The LCG is, in effect, s = ((1LL << 64) + ML) * s + a, if only we had 128-bit arithmetic.
+        final long u = ML * sl;
+        sh = (ML * sh) + Math.unsignedMultiplyHigh(ML, sl) + sl + ah;
+        sl = u + al;
+        if (Long.compareUnsigned(sl, u) < 0) ++sh;  // Handle the carry propagation from low half to high half.
+
+        // Update the XBG subgenerator
+        long q0 = x0, q1 = x1, q2 = x2, q3 = x3;
+        {   // xoshiro256 1.0
+            long t = q1 << 17;
+            q2 ^= q0;
+            q3 ^= q1;
+            q1 ^= q2;
+            q0 ^= q3;
+            q2 ^= t;
+            q3 = Long.rotateLeft(q3, 45);
+        }
+        x0 = q0; x1 = q1; x2 = q2; x3 = q3;
+
+        return result;
+    }
+
+}
diff --git a/tests/test_data/std/jdk/internal/random/L32X64MixRandom.class b/tests/test_data/std/jdk/internal/random/L32X64MixRandom.class
new file mode 100644
index 0000000000000000000000000000000000000000..e8d60c8aab1c029800193e5c2b5953c2e8f5499e
GIT binary patch
literal 2458
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zC{&<amFy<Hf6MIORLH{WS;Gpl20VgC>7QQl7;E67&E{W>c$K?l#3PXfrepy@N;TXc
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/random/L32X64MixRandom.java b/tests/test_data/std/jdk/internal/random/L32X64MixRandom.java
new file mode 100644
index 00000000..a9442bd0
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/random/L32X64MixRandom.java
@@ -0,0 +1,251 @@
+/*
+ * Copyright (c) 2021, 2024, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package jdk.internal.random;
+
+import java.util.concurrent.atomic.AtomicLong;
+import java.util.random.RandomGenerator;
+import jdk.internal.util.random.RandomSupport;
+import jdk.internal.util.random.RandomSupport.AbstractSplittableWithBrineGenerator;
+
+/**
+ * A "splittable" pseudorandom number generator (PRNG) whose period
+ * is roughly 2<sup>96</sup>.  Class {@link L32X64MixRandom} implements
+ * interfaces {@link RandomGenerator} and {@link SplittableGenerator},
+ * and therefore supports methods for producing pseudorandomly chosen
+ * values of type {@code int}, {@code long}, {@code float}, {@code double},
+ * and {@code boolean} (and for producing streams of pseudorandomly chosen
+ * numbers of type {@code int}, {@code long}, and {@code double}),
+ * as well as methods for creating new split-off {@link L32X64MixRandom}
+ * objects or streams of such objects.
+ *
+ * <p>The {@link L32X64MixRandom} algorithm is a specific member of
+ * the LXM family of algorithms for pseudorandom number generators;
+ * for more information, see the documentation for package
+ * {@link jdk.random}.  Each instance of {@link L32X64MixRandom}
+ * has 96 bits of state plus one 32-bit instance-specific parameter.
+ *
+ * <p>If two instances of {@link L32X64MixRandom} are created with
+ * the same seed within the same program execution, and the same
+ * sequence of method calls is made for each, they will generate and
+ * return identical sequences of values.
+ *
+ * <p>As with {@link java.util.SplittableRandom}, instances of
+ * {@link L32X64MixRandom} are <em>not</em> thread-safe.  They are
+ * designed to be split, not shared, across threads (see the {@link #split}
+ * method). For example, a {@link java.util.concurrent.ForkJoinTask}
+ * fork/join-style computation using random numbers might include a
+ * construction of the form
+ * {@code new Subtask(someL32X64MixRandom.split()).fork()}.
+ *
+ * <p>This class provides additional methods for generating random
+ * streams, that employ the above techniques when used in
+ * {@code stream.parallel()} mode.
+ *
+ * <p>Instances of {@link L32X64MixRandom} are not cryptographically
+ * secure.  Consider instead using {@link java.security.SecureRandom}
+ * in security-sensitive applications. Additionally,
+ * default-constructed instances do not use a cryptographically random
+ * seed unless the {@linkplain System#getProperty system property}
+ * {@code java.util.secureRandomSeed} is set to {@code true}.
+ *
+ * @since   17
+ *
+ */
+public final class L32X64MixRandom extends AbstractSplittableWithBrineGenerator {
+    /*
+     * Implementation Overview.
+     *
+     * The split operation uses the current generator to choose four new 32-bit
+     * int values that are then used to initialize the parameter `a` and the
+     * state variables `s`, `x0`, and `x1` for a newly constructed generator.
+     *
+     * With high probability, no two generators so chosen will have the same
+     * `a` parameter, and testing has indicated that the values generated by
+     * two instances of {@link L32X64MixRandom} will be (approximately)
+     * independent if the two instances have different values for `a`.
+     *
+     * The default (no-argument) constructor, in essence, uses
+     * "defaultGen" to generate four new 32-bit values for the same
+     * purpose.  Multiple generators created in this way will certainly
+     * differ in their `a` parameters.  The defaultGen state must be accessed
+     * in a thread-safe manner, so we use an AtomicLong to represent
+     * this state.  To bootstrap the defaultGen, we start off using a
+     * seed based on current time unless the
+     * java.util.secureRandomSeed property is set. This serves as a
+     * slimmed-down (and insecure) variant of SecureRandom that also
+     * avoids stalls that may occur when using /dev/random.
+     *
+     * File organization: First static fields, then instance
+     * fields, then constructors, then instance methods.
+     */
+
+    /* ---------------- static fields ---------------- */
+
+    /**
+     * The seed generator for default constructors.
+     */
+    private static final AtomicLong defaultGen = new AtomicLong(RandomSupport.initialSeed());
+
+    /*
+     * Multiplier used in the LCG portion of the algorithm.
+     * Chosen based on research by Sebastiano Vigna and Guy Steele (2019).
+     * The spectral scores for dimensions 2 through 8 for the multiplier 0xadb4a92d
+     * are [0.975884, 0.936244, 0.755793, 0.877642, 0.751300, 0.789333, 0.728869].
+     */
+
+    private static final int M = 0xadb4a92d;
+
+    /* ---------------- instance fields ---------------- */
+
+    /**
+     * The parameter that is used as an additive constant for the LCG.
+     * Must be odd.
+     */
+    private final int a;
+
+    /**
+     * The per-instance state: s for the LCG; x0 and x1 for the XBG.
+     * At least one of x0 and x1 must be nonzero.
+     */
+    private int s, x0, x1;
+
+    /* ---------------- constructors ---------------- */
+
+    /**
+     * Basic constructor that initializes all fields from parameters.
+     * It then adjusts the field values if necessary to ensure that
+     * all constraints on the values of fields are met.
+     *
+     * @param a additive parameter for the LCG
+     * @param s initial state for the LCG
+     * @param x0 first word of the initial state for the XBG
+     * @param x1 second word of the initial state for the XBG
+     */
+    public L32X64MixRandom(int a, int s, int x0, int x1) {
+        // Force a to be odd.
+        this.a = a | 1;
+        this.s = s;
+        this.x0 = x0;
+        this.x1 = x1;
+        // If x0 and x1 are both zero, we must choose nonzero values.
+        if ((x0 | x1) == 0) {
+       int v = s;
+            // At least one of the two values generated here will be nonzero.
+            this.x0 = RandomSupport.mixMurmur32(v += RandomSupport.GOLDEN_RATIO_32);
+            this.x1 = RandomSupport.mixMurmur32(v + RandomSupport.GOLDEN_RATIO_32);
+        }
+    }
+
+    /**
+     * Creates a new instance of {@link L32X64MixRandom} using the
+     * specified {@code long} value as the initial seed. Instances of
+     * {@link L32X64MixRandom} created with the same seed in the same
+     * program generate identical sequences of values.
+     *
+     * @param seed the initial seed
+     */
+    public L32X64MixRandom(long seed) {
+        // Using a value with irregularly spaced 1-bits to xor the seed
+        // argument tends to improve "pedestrian" seeds such as 0 or
+        // other small integers.  We may as well use SILVER_RATIO_64.
+        //
+        // The high half of the seed is hashed by mixMurmur32 to produce the `a` parameter.
+        // The low half of the seed is hashed by mixLea32 to produce the initial `x0`,
+        // which will then be used to produce the first generated value.
+        // Then x1 is filled in as if by a SplitMix PRNG with
+        // GOLDEN_RATIO_32 as the gamma value and mixLea32 as the mixer.
+        this(RandomSupport.mixMurmur32((int)((seed ^= RandomSupport.SILVER_RATIO_64) >>> 32)),
+             1,
+             RandomSupport.mixLea32((int)(seed)),
+             RandomSupport.mixLea32((int)(seed) + RandomSupport.GOLDEN_RATIO_32));
+    }
+
+    /**
+     * Creates a new instance of {@link L32X64MixRandom} that is likely to
+     * generate sequences of values that are statistically independent
+     * of those of any other instances in the current program execution,
+     * but may, and typically does, vary across program invocations.
+     */
+    public L32X64MixRandom() {
+        // Using GOLDEN_RATIO_64 here gives us a good Weyl sequence of values.
+        this(defaultGen.getAndAdd(RandomSupport.GOLDEN_RATIO_64));
+    }
+
+    /**
+     * Creates a new instance of {@link L32X64MixRandom} using the specified array of
+     * initial seed bytes. Instances of {@link L32X64MixRandom} created with the same
+     * seed array in the same program execution generate identical sequences of values.
+     *
+     * @param seed the initial seed
+     */
+    public L32X64MixRandom(byte[] seed) {
+        // Convert the seed to 4 int values, of which the last 2 are not all zero.
+        int[] data = RandomSupport.convertSeedBytesToInts(seed, 4, 2);
+        int a = data[0], s = data[1], x0 = data[2], x1 = data[3];
+        // Force a to be odd.
+        this.a = a | 1;
+        this.s = s;
+        this.x0 = x0;
+        this.x1 = x1;
+    }
+
+    /* ---------------- public methods ---------------- */
+
+    @Override
+    public SplittableGenerator split(SplittableGenerator source, long brine) {
+       // Pick a new instance "at random", but use (the low 31 bits of) the brine for `a`.
+        return new L32X64MixRandom((int)brine << 1, source.nextInt(),
+                   source.nextInt(), source.nextInt());
+    }
+
+    @Override
+    public int nextInt() {
+       // Compute the result based on current state information
+       // (this allows the computation to be overlapped with state update).
+        final int result = RandomSupport.mixLea32(s + x0);
+
+       // Update the LCG subgenerator
+        s = M * s + a;
+
+       // Update the XBG subgenerator
+        int q0 = x0, q1 = x1;
+        {   // xoroshiro64
+            q1 ^= q0;
+            q0 = Integer.rotateLeft(q0, 26);
+            q0 = q0 ^ q1 ^ (q1 << 9);
+            q1 = Integer.rotateLeft(q1, 13);
+        }
+        x0 = q0; x1 = q1;
+
+        return result;
+    }
+
+    @Override
+    public long nextLong() {
+        return ((long)nextInt() << 32) ^ (long)nextInt();
+    }
+
+}
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diff --git a/tests/test_data/std/jdk/internal/random/L64X1024MixRandom.java b/tests/test_data/std/jdk/internal/random/L64X1024MixRandom.java
new file mode 100644
index 00000000..074aac0c
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/random/L64X1024MixRandom.java
@@ -0,0 +1,314 @@
+/*
+ * Copyright (c) 2021, 2024, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package jdk.internal.random;
+
+import java.util.concurrent.atomic.AtomicLong;
+import java.util.random.RandomGenerator;
+import jdk.internal.util.random.RandomSupport;
+import jdk.internal.util.random.RandomSupport.AbstractSplittableWithBrineGenerator;
+
+/**
+ * A "splittable" pseudorandom number generator (PRNG) whose period
+ * is roughly 2<sup>1088</sup>.  Class {@link L64X1024MixRandom} implements
+ * interfaces {@link RandomGenerator} and {@link SplittableGenerator},
+ * and therefore supports methods for producing pseudorandomly chosen
+ * values of type {@code int}, {@code long}, {@code float}, {@code double},
+ * and {@code boolean} (and for producing streams of pseudorandomly chosen
+ * numbers of type {@code int}, {@code long}, and {@code double}),
+ * as well as methods for creating new split-off {@link L64X1024MixRandom}
+ * objects or streams of such objects.
+ *
+ * <p>The {@link L64X1024MixRandom} algorithm is a specific member of
+ * the LXM family of algorithms for pseudorandom number generators;
+ * for more information, see the documentation for package
+ * {@link jdk.random}.  Each instance of {@link L64X1024MixRandom}
+ * has 1088 bits of state plus one 64-bit instance-specific parameter.
+ *
+ * <p>If two instances of {@link L64X1024MixRandom} are created with
+ * the same seed within the same program execution, and the same
+ * sequence of method calls is made for each, they will generate and
+ * return identical sequences of values.
+ *
+ * <p>As with {@link java.util.SplittableRandom}, instances of
+ * {@link L64X1024MixRandom} are <em>not</em> thread-safe.  They are
+ * designed to be split, not shared, across threads (see the {@link #split}
+ * method). For example, a {@link java.util.concurrent.ForkJoinTask}
+ * fork/join-style computation using random numbers might include a
+ * construction of the form
+ * {@code new Subtask(someL64X1024MixRandom.split()).fork()}.
+ *
+ * <p>This class provides additional methods for generating random
+ * streams, that employ the above techniques when used in
+ * {@code stream.parallel()} mode.
+ *
+ * <p>Instances of {@link L64X1024MixRandom} are not cryptographically
+ * secure.  Consider instead using {@link java.security.SecureRandom}
+ * in security-sensitive applications. Additionally,
+ * default-constructed instances do not use a cryptographically random
+ * seed unless the {@linkplain System#getProperty system property}
+ * {@code java.util.secureRandomSeed} is set to {@code true}.
+ *
+ * @since   17
+ *
+ */
+public final class L64X1024MixRandom extends AbstractSplittableWithBrineGenerator {
+
+    /*
+     * Implementation Overview.
+     *
+     * The split() operation uses the current generator to choose 18 new 64-bit
+     * long values that are then used to initialize the parameter `a`, the
+     * state variable `s`, and the array `x` for a newly constructed generator.
+     *
+     * With extremely high probability, no two generators so chosen
+     * will have the same `a` parameter, and testing has indicated
+     * that the values generated by two instances of {@link L64X1024MixRandom}
+     * will be (approximately) independent if have different values for `a`.
+     *
+     * The default (no-argument) constructor, in essence, uses
+     * "defaultGen" to generate 18 new 64-bit values for the same
+     * purpose.  Multiple generators created in this way will certainly
+     * differ in their `a` parameters.  The defaultGen state must be accessed
+     * in a thread-safe manner, so we use an AtomicLong to represent
+     * this state.  To bootstrap the defaultGen, we start off using a
+     * seed based on current time unless the
+     * java.util.secureRandomSeed property is set. This serves as a
+     * slimmed-down (and insecure) variant of SecureRandom that also
+     * avoids stalls that may occur when using /dev/random.
+     *
+     * File organization: First static fields, then instance
+     * fields, then constructors, then instance methods.
+     */
+
+    /* ---------------- static fields ---------------- */
+
+    /*
+     * The length of the array x.
+     */
+
+    private static final int N = 16;
+
+    /**
+     * The seed generator for default constructors.
+     */
+    private static final AtomicLong defaultGen = new AtomicLong(RandomSupport.initialSeed());
+
+    /*
+     * Multiplier used in the LCG portion of the algorithm.
+     * Chosen based on research by Sebastiano Vigna and Guy Steele (2019).
+     * The spectral scores for dimensions 2 through 8 for the multiplier 0xd1342543de82ef95
+     * are [0.958602, 0.937479, 0.870757, 0.822326, 0.820405, 0.813065, 0.760215].
+     */
+
+    private static final long M = 0xd1342543de82ef95L;
+
+    /* ---------------- instance fields ---------------- */
+
+    /**
+     * The parameter that is used as an additive constant for the LCG.
+     * Must be odd.
+     */
+    private final long a;
+
+    /**
+     * The per-instance state: s for the LCG; the array x for the XBG;
+     * p is the rotating pointer into the array x.
+     * At least one of the 16 elements of the array x must be nonzero.
+     */
+    private long s;
+    private final long[] x;
+    private int p = N - 1;
+
+    /* ---------------- constructors ---------------- */
+
+    /**
+     * Basic constructor that initializes all fields from parameters.
+     * It then adjusts the field values if necessary to ensure that
+     * all constraints on the values of fields are met.
+     *
+     * @param a additive parameter for the LCG
+     * @param s initial state for the LCG
+     * @param x0 first word of the initial state for the XBG
+     * @param x1 second word of the initial state for the XBG
+     * @param x2 third word of the initial state for the XBG
+     * @param x3 fourth word of the initial state for the XBG
+     * @param x4 fifth word of the initial state for the XBG
+     * @param x5 sixth word of the initial state for the XBG
+     * @param x6 seventh word of the initial state for the XBG
+     * @param x7 eight word of the initial state for the XBG
+     * @param x8 ninth word of the initial state for the XBG
+     * @param x9 tenth word of the initial state for the XBG
+     * @param x10 eleventh word of the initial state for the XBG
+     * @param x11 twelfth word of the initial state for the XBG
+     * @param x12 thirteenth word of the initial state for the XBG
+     * @param x13 fourteenth word of the initial state for the XBG
+     * @param x14 fifteenth word of the initial state for the XBG
+     * @param x15 sixteenth word of the initial state for the XBG
+     */
+    public L64X1024MixRandom(long a, long s,
+                             long x0, long x1, long x2, long x3,
+                             long x4, long x5, long x6, long x7,
+                             long x8, long x9, long x10, long x11,
+                             long x12, long x13, long x14, long x15) {
+        // Force a to be odd.
+        this.a = a | 1;
+        this.s = s;
+        this.x = new long[N];
+        this.x[0] = x0;
+        this.x[1] = x1;
+        this.x[2] = x2;
+        this.x[3] = x3;
+        this.x[4] = x4;
+        this.x[5] = x5;
+        this.x[6] = x6;
+        this.x[7] = x7;
+        this.x[8] = x8;
+        this.x[9] = x9;
+        this.x[10] = x10;
+        this.x[11] = x11;
+        this.x[12] = x12;
+        this.x[13] = x13;
+        this.x[14] = x14;
+        this.x[15] = x15;
+        // If x0, x1, ..., x15 are all zero (very unlikely), we must choose nonzero values.
+        if ((x0 | x1 | x2 | x3 | x4 | x5 | x6 | x7 | x8 | x9 | x10 | x11 | x12 | x13 | x14 | x15) == 0) {
+       long v = s;
+            // At least fifteen of the sixteen values generated here will be nonzero.
+            for (int j = 0; j < N; j++) {
+                this.x[j] = RandomSupport.mixStafford13(v += RandomSupport.GOLDEN_RATIO_64);
+            }
+        }
+    }
+
+    /**
+     * Creates a new instance of {@link L64X1024MixRandom} using the
+     * specified {@code long} value as the initial seed. Instances of
+     * {@link L64X1024MixRandom} created with the same seed in the same
+     * program execution generate identical sequences of values.
+     *
+     * @param seed the initial seed
+     */
+    public L64X1024MixRandom(long seed) {
+        // Using a value with irregularly spaced 1-bits to xor the seed
+        // argument tends to improve "pedestrian" seeds such as 0 or
+        // other small integers.  We may as well use SILVER_RATIO_64.
+        //
+        // The seed is hashed by mixMurmur64 to produce the `a` parameter.
+        // The seed is hashed by mixStafford13 to produce the initial `x[0]`,
+        // which will then be used to produce the first generated value.
+        // The other x values are filled in as if by a SplitMix PRNG with
+        // GOLDEN_RATIO_64 as the gamma value and mixStafford13 as the mixer.
+        this(RandomSupport.mixMurmur64(seed ^= RandomSupport.SILVER_RATIO_64),
+             1,
+             RandomSupport.mixStafford13(seed),
+             RandomSupport.mixStafford13(seed += RandomSupport.GOLDEN_RATIO_64),
+             RandomSupport.mixStafford13(seed += RandomSupport.GOLDEN_RATIO_64),
+             RandomSupport.mixStafford13(seed += RandomSupport.GOLDEN_RATIO_64),
+             RandomSupport.mixStafford13(seed += RandomSupport.GOLDEN_RATIO_64),
+             RandomSupport.mixStafford13(seed += RandomSupport.GOLDEN_RATIO_64),
+             RandomSupport.mixStafford13(seed += RandomSupport.GOLDEN_RATIO_64),
+             RandomSupport.mixStafford13(seed += RandomSupport.GOLDEN_RATIO_64),
+             RandomSupport.mixStafford13(seed += RandomSupport.GOLDEN_RATIO_64),
+             RandomSupport.mixStafford13(seed += RandomSupport.GOLDEN_RATIO_64),
+             RandomSupport.mixStafford13(seed += RandomSupport.GOLDEN_RATIO_64),
+             RandomSupport.mixStafford13(seed += RandomSupport.GOLDEN_RATIO_64),
+             RandomSupport.mixStafford13(seed += RandomSupport.GOLDEN_RATIO_64),
+             RandomSupport.mixStafford13(seed += RandomSupport.GOLDEN_RATIO_64),
+             RandomSupport.mixStafford13(seed += RandomSupport.GOLDEN_RATIO_64),
+             RandomSupport.mixStafford13(seed + RandomSupport.GOLDEN_RATIO_64));
+    }
+
+    /**
+     * Creates a new instance of {@link L64X1024MixRandom} that is likely to
+     * generate sequences of values that are statistically independent
+     * of those of any other instances in the current program execution,
+     * but may, and typically does, vary across program invocations.
+     */
+    public L64X1024MixRandom() {
+        // Using GOLDEN_RATIO_64 here gives us a good Weyl sequence of values.
+        this(defaultGen.getAndAdd(RandomSupport.GOLDEN_RATIO_64));
+    }
+
+    /**
+     * Creates a new instance of {@link L64X1024MixRandom} using the specified array of
+     * initial seed bytes. Instances of {@link L64X1024MixRandom} created with the same
+     * seed array in the same program execution generate identical sequences of values.
+     *
+     * @param seed the initial seed
+     */
+    public L64X1024MixRandom(byte[] seed) {
+        // Convert the seed to 18 long values, of which the last 16 are not all zero.
+        long[] data = RandomSupport.convertSeedBytesToLongs(seed, 18, 16);
+        long a = data[0], s = data[1];
+        // Force a to be odd.
+        this.a = a | 1;
+        this.s = s;
+        this.x = new long[N];
+        for (int j = 0; j < N; j++) {
+            this.x[j] = data[2+j];
+        }
+    }
+
+    /* ---------------- public methods ---------------- */
+
+    @Override
+    public SplittableGenerator split(SplittableGenerator source, long brine) {
+       // Pick a new instance "at random", but use the brine for `a`.
+        return new L64X1024MixRandom(brine << 1, source.nextLong(),
+                    source.nextLong(), source.nextLong(),
+                                     source.nextLong(), source.nextLong(),
+                                     source.nextLong(), source.nextLong(),
+                                     source.nextLong(), source.nextLong(),
+                                     source.nextLong(), source.nextLong(),
+                                     source.nextLong(), source.nextLong(),
+                                     source.nextLong(), source.nextLong(),
+                                     source.nextLong(), source.nextLong());
+    }
+
+    @Override
+    public long nextLong() {
+        // First part of xoroshiro1024: fetch array data
+        final int q = p;
+        final long s0 = x[p = (p + 1) & (N - 1)];
+        long s15 = x[q];
+
+       // Compute the result based on current state information
+       // (this allows the computation to be overlapped with state update).
+
+       final long result = RandomSupport.mixLea64(s + s0);
+
+       // Update the LCG subgenerator
+        s = M * s + a;  // LCG
+
+        // Second part of xoroshiro1024: update array data
+        s15 ^= s0;
+        x[q] = Long.rotateLeft(s0, 25) ^ s15 ^ (s15 << 27);
+        x[p] = Long.rotateLeft(s15, 36);
+
+        return result;
+    }
+
+}
diff --git a/tests/test_data/std/jdk/internal/random/L64X128MixRandom.class b/tests/test_data/std/jdk/internal/random/L64X128MixRandom.class
new file mode 100644
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GIT binary patch
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diff --git a/tests/test_data/std/jdk/internal/random/L64X128MixRandom.java b/tests/test_data/std/jdk/internal/random/L64X128MixRandom.java
new file mode 100644
index 00000000..37e10237
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/random/L64X128MixRandom.java
@@ -0,0 +1,247 @@
+/*
+ * Copyright (c) 2021, 2024, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package jdk.internal.random;
+
+import java.util.concurrent.atomic.AtomicLong;
+import java.util.random.RandomGenerator;
+import jdk.internal.util.random.RandomSupport;
+import jdk.internal.util.random.RandomSupport.AbstractSplittableWithBrineGenerator;
+
+/**
+ * A "splittable" pseudorandom number generator (PRNG) whose period
+ * is roughly 2<sup>192</sup>.  Class {@link L64X128MixRandom} implements
+ * interfaces {@link RandomGenerator} and {@link SplittableGenerator},
+ * and therefore supports methods for producing pseudorandomly chosen
+ * values of type {@code int}, {@code long}, {@code float}, {@code double},
+ * and {@code boolean} (and for producing streams of pseudorandomly chosen
+ * numbers of type {@code int}, {@code long}, and {@code double}),
+ * as well as methods for creating new split-off {@link L64X128MixRandom}
+ * objects or streams of such objects.
+ *
+ * <p>The {@link L64X128MixRandom} algorithm is a specific member of
+ * the LXM family of algorithms for pseudorandom number generators;
+ * for more information, see the documentation for package
+ * {@link jdk.random}.  Each instance of {@link L64X128MixRandom}
+ * has 192 bits of state plus one 64-bit instance-specific parameter.
+ *
+ * <p>If two instances of {@link L64X128MixRandom} are created with
+ * the same seed within the same program execution, and the same
+ * sequence of method calls is made for each, they will generate and
+ * return identical sequences of values.
+ *
+ * <p>As with {@link java.util.SplittableRandom}, instances of
+ * {@link L64X128MixRandom} are <em>not</em> thread-safe.  They are
+ * designed to be split, not shared, across threads (see the {@link #split}
+ * method). For example, a {@link java.util.concurrent.ForkJoinTask}
+ * fork/join-style computation using random numbers might include a
+ * construction of the form
+ * {@code new Subtask(someL64X128MixRandom.split()).fork()}.
+ *
+ * <p>This class provides additional methods for generating random
+ * streams, that employ the above techniques when used in
+ * {@code stream.parallel()} mode.
+ *
+ * <p>Instances of {@link L64X128MixRandom} are not cryptographically
+ * secure.  Consider instead using {@link java.security.SecureRandom}
+ * in security-sensitive applications. Additionally,
+ * default-constructed instances do not use a cryptographically random
+ * seed unless the {@linkplain System#getProperty system property}
+ * {@code java.util.secureRandomSeed} is set to {@code true}.
+ *
+ * @since   17
+ *
+ */
+public final class L64X128MixRandom extends AbstractSplittableWithBrineGenerator {
+
+    /*
+     * Implementation Overview.
+     *
+     * The split operation uses the current generator to choose four new 64-bit
+     * long values that are then used to initialize the parameter `a` and the
+     * state variables `s`, `x0`, and `x1` for a newly constructed generator.
+     *
+     * With extremely high probability, no two generators so chosen
+     * will have the same `a` parameter, and testing has indicated
+     * that the values generated by two instances of {@link L64X128MixRandom}
+     * will be (approximately) independent if have different values for `a`.
+     *
+     * The default (no-argument) constructor, in essence, uses
+     * "defaultGen" to generate four new 64-bit values for the same
+     * purpose.  Multiple generators created in this way will certainly
+     * differ in their `a` parameters.  The defaultGen state must be accessed
+     * in a thread-safe manner, so we use an AtomicLong to represent
+     * this state.  To bootstrap the defaultGen, we start off using a
+     * seed based on current time unless the
+     * java.util.secureRandomSeed property is set. This serves as a
+     * slimmed-down (and insecure) variant of SecureRandom that also
+     * avoids stalls that may occur when using /dev/random.
+     *
+     * File organization: First static fields, then instance
+     * fields, then constructors, then instance methods.
+     */
+
+    /* ---------------- static fields ---------------- */
+
+    /**
+     * The seed generator for default constructors.
+     */
+    private static final AtomicLong defaultGen = new AtomicLong(RandomSupport.initialSeed());
+
+    /*
+     * Multiplier used in the LCG portion of the algorithm.
+     * Chosen based on research by Sebastiano Vigna and Guy Steele (2019).
+     * The spectral scores for dimensions 2 through 8 for the multiplier 0xd1342543de82ef95L
+     * are [0.958602, 0.937479, 0.870757, 0.822326, 0.820405, 0.813065, 0.760215].
+     */
+
+    private static final long M = 0xd1342543de82ef95L;
+
+    /* ---------------- instance fields ---------------- */
+
+    /**
+     * The parameter that is used as an additive constant for the LCG.
+     * Must be odd.
+     */
+    private final long a;
+
+    /**
+     * The per-instance state: s for the LCG; x0 and x1 for the XBG.
+     * At least one of x0 and x1 must be nonzero.
+     */
+    private long s, x0, x1;
+
+    /* ---------------- constructors ---------------- */
+
+    /**
+     * Basic constructor that initializes all fields from parameters.
+     * It then adjusts the field values if necessary to ensure that
+     * all constraints on the values of fields are met.
+     *
+     * @param a additive parameter for the LCG
+     * @param s initial state for the LCG
+     * @param x0 first word of the initial state for the XBG
+     * @param x1 second word of the initial state for the XBG
+     */
+    public L64X128MixRandom(long a, long s, long x0, long x1) {
+        // Force a to be odd.
+        this.a = a | 1;
+        this.s = s;
+        this.x0 = x0;
+        this.x1 = x1;
+        // If x0 and x1 are both zero, we must choose nonzero values.
+        if ((x0 | x1) == 0) {
+       long v = s;
+            // At least one of the two values generated here will be nonzero.
+            this.x0 = RandomSupport.mixStafford13(v += RandomSupport.GOLDEN_RATIO_64);
+            this.x1 = RandomSupport.mixStafford13(v + RandomSupport.GOLDEN_RATIO_64);
+        }
+    }
+
+    /**
+     * Creates a new instance of {@link L64X128MixRandom} using the
+     * specified {@code long} value as the initial seed. Instances of
+     * {@link L64X128MixRandom} created with the same seed in the same
+     * program generate identical sequences of values.
+     *
+     * @param seed the initial seed
+     */
+    public L64X128MixRandom(long seed) {
+        // Using a value with irregularly spaced 1-bits to xor the seed
+        // argument tends to improve "pedestrian" seeds such as 0 or
+        // other small integers.  We may as well use SILVER_RATIO_64.
+        //
+        // The seed is hashed by mixMurmur64 to produce the `a` parameter.
+        // The seed is hashed by mixStafford13 to produce the initial `x0`,
+        // which will then be used to produce the first generated value.
+        // Then x1 is filled in as if by a SplitMix PRNG with
+        // GOLDEN_RATIO_64 as the gamma value and mixStafford13 as the mixer.
+        this(RandomSupport.mixMurmur64(seed ^= RandomSupport.SILVER_RATIO_64),
+             1,
+             RandomSupport.mixStafford13(seed),
+             RandomSupport.mixStafford13(seed + RandomSupport.GOLDEN_RATIO_64));
+    }
+
+    /**
+     * Creates a new instance of {@link L64X128MixRandom} that is likely to
+     * generate sequences of values that are statistically independent
+     * of those of any other instances in the current program execution,
+     * but may, and typically does, vary across program invocations.
+     */
+    public L64X128MixRandom() {
+        // Using GOLDEN_RATIO_64 here gives us a good Weyl sequence of values.
+        this(defaultGen.getAndAdd(RandomSupport.GOLDEN_RATIO_64));
+    }
+
+    /**
+     * Creates a new instance of {@link L64X128MixRandom} using the specified array of
+     * initial seed bytes. Instances of {@link L64X128MixRandom} created with the same
+     * seed array in the same program execution generate identical sequences of values.
+     *
+     * @param seed the initial seed
+     */
+    public L64X128MixRandom(byte[] seed) {
+        // Convert the seed to 4 long values, of which the last 2 are not all zero.
+        long[] data = RandomSupport.convertSeedBytesToLongs(seed, 4, 2);
+        long a = data[0], s = data[1], x0 = data[2], x1 = data[3];
+        // Force a to be odd.
+        this.a = a | 1;
+        this.s = s;
+        this.x0 = x0;
+        this.x1 = x1;
+    }
+
+    /* ---------------- public methods ---------------- */
+
+    @Override
+    public SplittableGenerator split(SplittableGenerator source, long brine) {
+       // Pick a new instance "at random", but use the brine for `a`.
+        return new L64X128MixRandom(brine << 1, source.nextLong(),
+                   source.nextLong(), source.nextLong());
+    }
+
+    @Override
+    public long nextLong() {
+       // Compute the result based on current state information
+       // (this allows the computation to be overlapped with state update).
+        final long result = RandomSupport.mixLea64(s + x0);
+
+       // Update the LCG subgenerator
+        s = M * s + a;
+
+       // Update the XBG subgenerator
+        long q0 = x0, q1 = x1;
+        {   // xoroshiro128v1_0
+            q1 ^= q0;
+            q0 = Long.rotateLeft(q0, 24);
+            q0 = q0 ^ q1 ^ (q1 << 16);
+            q1 = Long.rotateLeft(q1, 37);
+        }
+        x0 = q0; x1 = q1;
+
+        return result;
+    }
+
+}
diff --git a/tests/test_data/std/jdk/internal/random/L64X128StarStarRandom.class b/tests/test_data/std/jdk/internal/random/L64X128StarStarRandom.class
new file mode 100644
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GIT binary patch
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HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/random/L64X128StarStarRandom.java b/tests/test_data/std/jdk/internal/random/L64X128StarStarRandom.java
new file mode 100644
index 00000000..1d1a00ca
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/random/L64X128StarStarRandom.java
@@ -0,0 +1,247 @@
+/*
+ * Copyright (c) 2021, 2024, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package jdk.internal.random;
+
+import java.util.concurrent.atomic.AtomicLong;
+import java.util.random.RandomGenerator;
+import jdk.internal.util.random.RandomSupport;
+import jdk.internal.util.random.RandomSupport.AbstractSplittableWithBrineGenerator;
+
+/**
+ * A "splittable" pseudorandom number generator (PRNG) whose period
+ * is roughly 2<sup>192</sup>.  Class {@link L64X128StarStarRandom} implements
+ * interfaces {@link RandomGenerator} and {@link SplittableGenerator},
+ * and therefore supports methods for producing pseudorandomly chosen
+ * values of type {@code int}, {@code long}, {@code float}, {@code double},
+ * and {@code boolean} (and for producing streams of pseudorandomly chosen
+ * numbers of type {@code int}, {@code long}, and {@code double}),
+ * as well as methods for creating new split-off {@link L64X128StarStarRandom}
+ * objects or streams of such objects.
+ *
+ * <p>The {@link L64X128StarStarRandom} algorithm is a specific member of
+ * the LXM family of algorithms for pseudorandom number generators;
+ * for more information, see the documentation for package
+ * {@link jdk.random}.  Each instance of {@link L64X128StarStarRandom}
+ * has 192 bits of state plus one 64-bit instance-specific parameter.
+ *
+ * <p>If two instances of {@link L64X128StarStarRandom} are created with
+ * the same seed within the same program execution, and the same
+ * sequence of method calls is made for each, they will generate and
+ * return identical sequences of values.
+ *
+ * <p>As with {@link java.util.SplittableRandom}, instances of
+ * {@link L64X128StarStarRandom} are <em>not</em> thread-safe.  They are
+ * designed to be split, not shared, across threads (see the {@link #split}
+ * method). For example, a {@link java.util.concurrent.ForkJoinTask}
+ * fork/join-style computation using random numbers might include a
+ * construction of the form
+ * {@code new Subtask(someL64X128StarStarRandom.split()).fork()}.
+ *
+ * <p>This class provides additional methods for generating random
+ * streams, that employ the above techniques when used in
+ * {@code stream.parallel()} mode.
+ *
+ * <p>Instances of {@link L64X128StarStarRandom} are not cryptographically
+ * secure.  Consider instead using {@link java.security.SecureRandom}
+ * in security-sensitive applications. Additionally,
+ * default-constructed instances do not use a cryptographically random
+ * seed unless the {@linkplain System#getProperty system property}
+ * {@code java.util.secureRandomSeed} is set to {@code true}.
+ *
+ * @since   17
+ *
+ */
+public final class L64X128StarStarRandom extends AbstractSplittableWithBrineGenerator {
+
+    /*
+     * Implementation Overview.
+     *
+     * The split operation uses the current generator to choose four new 64-bit
+     * long values that are then used to initialize the parameter `a` and the
+     * state variables `s`, `x0`, and `x1` for a newly constructed generator.
+     *
+     * With extremely high probability, no two generators so chosen
+     * will have the same `a` parameter, and testing has indicated
+     * that the values generated by two instances of {@link L64X128StarStarRandom}
+     * will be (approximately) independent if have different values for `a`.
+     *
+     * The default (no-argument) constructor, in essence, uses
+     * "defaultGen" to generate four new 64-bit values for the same
+     * purpose.  Multiple generators created in this way will certainly
+     * differ in their `a` parameters.  The defaultGen state must be accessed
+     * in a thread-safe manner, so we use an AtomicLong to represent
+     * this state.  To bootstrap the defaultGen, we start off using a
+     * seed based on current time unless the
+     * java.util.secureRandomSeed property is set. This serves as a
+     * slimmed-down (and insecure) variant of SecureRandom that also
+     * avoids stalls that may occur when using /dev/random.
+     *
+     * File organization: First static fields, then instance
+     * fields, then constructors, then instance methods.
+     */
+
+    /* ---------------- static fields ---------------- */
+
+    /**
+     * The seed generator for default constructors.
+     */
+    private static final AtomicLong defaultGen = new AtomicLong(RandomSupport.initialSeed());
+
+    /*
+     * Multiplier used in the LCG portion of the algorithm.
+     * Chosen based on research by Sebastiano Vigna and Guy Steele (2019).
+     * The spectral scores for dimensions 2 through 8 for the multiplier 0xd1342543de82ef95
+     * are [0.958602, 0.937479, 0.870757, 0.822326, 0.820405, 0.813065, 0.760215].
+     */
+
+    private static final long M = 0xd1342543de82ef95L;
+
+    /* ---------------- instance fields ---------------- */
+
+    /**
+     * The parameter that is used as an additive constant for the LCG.
+     * Must be odd.
+     */
+    private final long a;
+
+    /**
+     * The per-instance state: s for the LCG; x0 and x1 for the XBG.
+     * At least one of x0 and x1 must be nonzero.
+     */
+    private long s, x0, x1;
+
+    /* ---------------- constructors ---------------- */
+
+    /**
+     * Basic constructor that initializes all fields from parameters.
+     * It then adjusts the field values if necessary to ensure that
+     * all constraints on the values of fields are met.
+     *
+     * @param a additive parameter for the LCG
+     * @param s initial state for the LCG
+     * @param x0 first word of the initial state for the XBG
+     * @param x1 second word of the initial state for the XBG
+     */
+    public L64X128StarStarRandom(long a, long s, long x0, long x1) {
+        // Force a to be odd.
+        this.a = a | 1;
+        this.s = s;
+        this.x0 = x0;
+        this.x1 = x1;
+        // If x0 and x1 are both zero, we must choose nonzero values.
+        if ((x0 | x1) == 0) {
+       long v = s;
+            // At least one of the two values generated here will be nonzero.
+            this.x0 = RandomSupport.mixStafford13(v += RandomSupport.GOLDEN_RATIO_64);
+            this.x1 = RandomSupport.mixStafford13(v + RandomSupport.GOLDEN_RATIO_64);
+        }
+    }
+
+    /**
+     * Creates a new instance of {@link L64X128StarStarRandom} using the
+     * specified {@code long} value as the initial seed. Instances of
+     * {@link L64X128StarStarRandom} created with the same seed in the same
+     * program generate identical sequences of values.
+     *
+     * @param seed the initial seed
+     */
+    public L64X128StarStarRandom(long seed) {
+        // Using a value with irregularly spaced 1-bits to xor the seed
+        // argument tends to improve "pedestrian" seeds such as 0 or
+        // other small integers.  We may as well use SILVER_RATIO_64.
+        //
+        // The seed is hashed by mixMurmur64 to produce the `a` parameter.
+        // The seed is hashed by mixStafford13 to produce the initial `x0`,
+        // which will then be used to produce the first generated value.
+        // Then x1 is filled in as if by a SplitMix PRNG with
+        // GOLDEN_RATIO_64 as the gamma value and mixStafford13 as the mixer.
+        this(RandomSupport.mixMurmur64(seed ^= RandomSupport.SILVER_RATIO_64),
+             1,
+             RandomSupport.mixStafford13(seed),
+             RandomSupport.mixStafford13(seed + RandomSupport.GOLDEN_RATIO_64));
+    }
+
+    /**
+     * Creates a new instance of {@link L64X128StarStarRandom} that is likely to
+     * generate sequences of values that are statistically independent
+     * of those of any other instances in the current program execution,
+     * but may, and typically does, vary across program invocations.
+     */
+    public L64X128StarStarRandom() {
+        // Using GOLDEN_RATIO_64 here gives us a good Weyl sequence of values.
+        this(defaultGen.getAndAdd(RandomSupport.GOLDEN_RATIO_64));
+    }
+
+    /**
+     * Creates a new instance of {@link L64X128StarStarRandom} using the specified array of
+     * initial seed bytes. Instances of {@link L64X128StarStarRandom} created with the same
+     * seed array in the same program execution generate identical sequences of values.
+     *
+     * @param seed the initial seed
+     */
+    public L64X128StarStarRandom(byte[] seed) {
+        // Convert the seed to 4 long values, of which the last 2 are not all zero.
+        long[] data = RandomSupport.convertSeedBytesToLongs(seed, 4, 2);
+        long a = data[0], s = data[1], x0 = data[2], x1 = data[3];
+        // Force a to be odd.
+        this.a = a | 1;
+        this.s = s;
+        this.x0 = x0;
+        this.x1 = x1;
+    }
+
+    /* ---------------- public methods ---------------- */
+
+    @Override
+    public SplittableGenerator split(SplittableGenerator source, long brine) {
+       // Pick a new instance "at random", but use the brine for `a`.
+        return new L64X128StarStarRandom(brine << 1, source.nextLong(),
+                    source.nextLong(), source.nextLong());
+    }
+
+    @Override
+    public long nextLong() {
+       // Compute the result based on current state information
+       // (this allows the computation to be overlapped with state update).
+        final long result = Long.rotateLeft((s + x0) * 5, 7) * 9;  // "starstar" scrambler
+
+       // Update the LCG subgenerator
+        s = M * s + a;
+
+       // Update the XBG subgenerator
+        long q0 = x0, q1 = x1;
+        {   // xoroshiro128v1_0
+            q1 ^= q0;
+            q0 = Long.rotateLeft(q0, 24);
+            q0 = q0 ^ q1 ^ (q1 << 16);
+            q1 = Long.rotateLeft(q1, 37);
+        }
+        x0 = q0; x1 = q1;
+
+        return result;
+    }
+
+}
diff --git a/tests/test_data/std/jdk/internal/random/L64X256MixRandom.class b/tests/test_data/std/jdk/internal/random/L64X256MixRandom.class
new file mode 100644
index 0000000000000000000000000000000000000000..dff8c0d866f497377213616d7b0dcfb9c057249e
GIT binary patch
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HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/random/L64X256MixRandom.java b/tests/test_data/std/jdk/internal/random/L64X256MixRandom.java
new file mode 100644
index 00000000..109148e3
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/random/L64X256MixRandom.java
@@ -0,0 +1,262 @@
+/*
+ * Copyright (c) 2021, 2024, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package jdk.internal.random;
+
+import java.util.concurrent.atomic.AtomicLong;
+import java.util.random.RandomGenerator;
+import jdk.internal.util.random.RandomSupport;
+import jdk.internal.util.random.RandomSupport.AbstractSplittableWithBrineGenerator;
+
+/**
+ * A "splittable" pseudorandom number generator (PRNG) whose period
+ * is roughly 2<sup>320</sup>.  Class {@link L64X256MixRandom} implements
+ * interfaces {@link RandomGenerator} and {@link SplittableGenerator},
+ * and therefore supports methods for producing pseudorandomly chosen
+ * values of type {@code int}, {@code long}, {@code float}, {@code double},
+ * and {@code boolean} (and for producing streams of pseudorandomly chosen
+ * numbers of type {@code int}, {@code long}, and {@code double}),
+ * as well as methods for creating new split-off {@link L64X256MixRandom}
+ * objects or streams of such objects.
+ *
+ * <p>The {@link L64X256MixRandom} algorithm is a specific member of
+ * the LXM family of algorithms for pseudorandom number generators;
+ * for more information, see the documentation for package
+ * {@link jdk.random}.  Each instance of {@link L64X256MixRandom}
+ * has 320 bits of state plus one 64-bit instance-specific parameter.
+ *
+ * <p>If two instances of {@link L64X256MixRandom} are created with
+ * the same seed within the same program execution, and the same
+ * sequence of method calls is made for each, they will generate and
+ * return identical sequences of values.
+ *
+ * <p>As with {@link java.util.SplittableRandom}, instances of
+ * {@link L64X256MixRandom} are <em>not</em> thread-safe.  They are
+ * designed to be split, not shared, across threads (see the {@link #split}
+ * method). For example, a {@link java.util.concurrent.ForkJoinTask}
+ * fork/join-style computation using random numbers might include a
+ * construction of the form
+ * {@code new Subtask(someL64X256MixRandom.split()).fork()}.
+ *
+ * <p>This class provides additional methods for generating random
+ * streams, that employ the above techniques when used in
+ * {@code stream.parallel()} mode.
+ *
+ * <p>Instances of {@link L64X256MixRandom} are not cryptographically
+ * secure.  Consider instead using {@link java.security.SecureRandom}
+ * in security-sensitive applications. Additionally,
+ * default-constructed instances do not use a cryptographically random
+ * seed unless the {@linkplain System#getProperty system property}
+ * {@code java.util.secureRandomSeed} is set to {@code true}.
+ *
+ * @since   17
+ *
+ */
+public final class L64X256MixRandom extends AbstractSplittableWithBrineGenerator {
+
+    /*
+     * Implementation Overview.
+     *
+     * The split operation uses the current generator to choose six new 64-bit
+     * long values that are then used to initialize the parameter `a` and the
+     * state variables `s`, `x0`, `x1`, `x2`, and `x3` for a newly constructed
+     * generator.
+     *
+     * With extremely high probability, no two generators so chosen
+     * will have the same `a` parameter, and testing has indicated
+     * that the values generated by two instances of {@link L64X256MixRandom}
+     * will be (approximately) independent if have different values for `a`.
+     *
+     * The default (no-argument) constructor, in essence, uses
+     * "defaultGen" to generate six new 64-bit values for the same
+     * purpose.  Multiple generators created in this way will certainly
+     * differ in their `a` parameters.  The defaultGen state must be accessed
+     * in a thread-safe manner, so we use an AtomicLong to represent
+     * this state.  To bootstrap the defaultGen, we start off using a
+     * seed based on current time unless the
+     * java.util.secureRandomSeed property is set. This serves as a
+     * slimmed-down (and insecure) variant of SecureRandom that also
+     * avoids stalls that may occur when using /dev/random.
+     *
+     * File organization: First static fields, then instance
+     * fields, then constructors, then instance methods.
+     */
+
+    /* ---------------- static fields ---------------- */
+
+    /**
+     * The seed generator for default constructors.
+     */
+    private static final AtomicLong defaultGen = new AtomicLong(RandomSupport.initialSeed());
+
+    /*
+     * Multiplier used in the LCG portion of the algorithm.
+     * Chosen based on research by Sebastiano Vigna and Guy Steele (2019).
+     * The spectral scores for dimensions 2 through 8 for the multiplier 0xd1342543de82ef95
+     * are [0.958602, 0.937479, 0.870757, 0.822326, 0.820405, 0.813065, 0.760215].
+     */
+
+    private static final long M = 0xd1342543de82ef95L;
+
+    /* ---------------- instance fields ---------------- */
+
+    /**
+     * The parameter that is used as an additive constant for the LCG.
+     * Must be odd.
+     */
+    private final long a;
+
+    /**
+     * The per-instance state: s for the LCG; x0, x1, x2, and x3 for the XBG.
+     * At least one of the four fields x0, x1, x2, and x3 must be nonzero.
+     */
+    private long s, x0, x1, x2, x3;
+
+    /* ---------------- constructors ---------------- */
+
+    /**
+     * Basic constructor that initializes all fields from parameters.
+     * It then adjusts the field values if necessary to ensure that
+     * all constraints on the values of fields are met.
+     *
+     * @param a additive parameter for the LCG
+     * @param s initial state for the LCG
+     * @param x0 first word of the initial state for the XBG
+     * @param x1 second word of the initial state for the XBG
+     * @param x2 third word of the initial state for the XBG
+     * @param x3 fourth word of the initial state for the XBG
+     */
+    public L64X256MixRandom(long a, long s, long x0, long x1, long x2, long x3) {
+        // Force a to be odd.
+        this.a = a | 1;
+        this.s = s;
+        this.x0 = x0;
+        this.x1 = x1;
+        this.x2 = x2;
+        this.x3 = x3;
+        // If x0, x1, x2, and x3 are all zero, we must choose nonzero values.
+        if ((x0 | x1 | x2 | x3) == 0) {
+       long v = s;
+            // At least three of the four values generated here will be nonzero.
+            this.x0 = RandomSupport.mixStafford13(v += RandomSupport.GOLDEN_RATIO_64);
+            this.x1 = RandomSupport.mixStafford13(v += RandomSupport.GOLDEN_RATIO_64);
+            this.x2 = RandomSupport.mixStafford13(v += RandomSupport.GOLDEN_RATIO_64);
+            this.x3 = RandomSupport.mixStafford13(v + RandomSupport.GOLDEN_RATIO_64);
+        }
+    }
+
+    /**
+     * Creates a new instance of {@link L64X256MixRandom} using the
+     * specified {@code long} value as the initial seed. Instances of
+     * {@link L64X256MixRandom} created with the same seed in the same
+     * program generate identical sequences of values.
+     *
+     * @param seed the initial seed
+     */
+    public L64X256MixRandom(long seed) {
+        // Using a value with irregularly spaced 1-bits to xor the seed
+        // argument tends to improve "pedestrian" seeds such as 0 or
+        // other small integers.  We may as well use SILVER_RATIO_64.
+        //
+        // The seed is hashed by mixMurmur64 to produce the `a` parameter.
+        // The seed is hashed by mixStafford13 to produce the initial `x0`,
+        // which will then be used to produce the first generated value.
+        // The other x values are filled in as if by a SplitMix PRNG with
+        // GOLDEN_RATIO_64 as the gamma value and mixStafford13 as the mixer.
+        this(RandomSupport.mixMurmur64(seed ^= RandomSupport.SILVER_RATIO_64),
+             1,
+             RandomSupport.mixStafford13(seed),
+             RandomSupport.mixStafford13(seed += RandomSupport.GOLDEN_RATIO_64),
+             RandomSupport.mixStafford13(seed += RandomSupport.GOLDEN_RATIO_64),
+             RandomSupport.mixStafford13(seed + RandomSupport.GOLDEN_RATIO_64));
+    }
+
+    /**
+     * Creates a new instance of {@link L64X256MixRandom} that is likely to
+     * generate sequences of values that are statistically independent
+     * of those of any other instances in the current program execution,
+     * but may, and typically does, vary across program invocations.
+     */
+    public L64X256MixRandom() {
+        // Using GOLDEN_RATIO_64 here gives us a good Weyl sequence of values.
+        this(defaultGen.getAndAdd(RandomSupport.GOLDEN_RATIO_64));
+    }
+
+    /**
+     * Creates a new instance of {@link L64X256MixRandom} using the specified array of
+     * initial seed bytes. Instances of {@link L64X256MixRandom} created with the same
+     * seed array in the same program execution generate identical sequences of values.
+     *
+     * @param seed the initial seed
+     */
+    public L64X256MixRandom(byte[] seed) {
+        // Convert the seed to 6 long values, of which the last 4 are not all zero.
+        long[] data = RandomSupport.convertSeedBytesToLongs(seed, 6, 4);
+        long a = data[0], s = data[1], x0 = data[2], x1 = data[3], x2 = data[4], x3 = data[5];
+        // Force a to be odd.
+        this.a = a | 1;
+        this.s = s;
+        this.x0 = x0;
+        this.x1 = x1;
+        this.x2 = x2;
+        this.x3 = x3;
+    }
+
+    /* ---------------- public methods ---------------- */
+
+    @Override
+    public SplittableGenerator split(SplittableGenerator source, long brine) {
+       // Pick a new instance "at random", but use the brine for `a`.
+        return new L64X256MixRandom(brine << 1, source.nextLong(),
+                   source.nextLong(), source.nextLong(),
+                   source.nextLong(), source.nextLong());
+    }
+
+    @Override
+    public long nextLong() {
+       // Compute the result based on current state information
+       // (this allows the computation to be overlapped with state update).
+        final long result = RandomSupport.mixLea64(s + x0);
+
+       // Update the LCG subgenerator
+        s = M * s + a;
+
+       // Update the XBG subgenerator
+        long q0 = x0, q1 = x1, q2 = x2, q3 = x3;
+        {   // xoshiro256 1.0
+            long t = q1 << 17;
+            q2 ^= q0;
+            q3 ^= q1;
+            q1 ^= q2;
+            q0 ^= q3;
+            q2 ^= t;
+            q3 = Long.rotateLeft(q3, 45);
+        }
+        x0 = q0; x1 = q1; x2 = q2; x3 = q3;
+
+        return result;
+    }
+
+ }
diff --git a/tests/test_data/std/jdk/internal/random/Xoroshiro128PlusPlus.class b/tests/test_data/std/jdk/internal/random/Xoroshiro128PlusPlus.class
new file mode 100644
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GIT binary patch
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diff --git a/tests/test_data/std/jdk/internal/random/Xoroshiro128PlusPlus.java b/tests/test_data/std/jdk/internal/random/Xoroshiro128PlusPlus.java
new file mode 100644
index 00000000..3dc90fff
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/random/Xoroshiro128PlusPlus.java
@@ -0,0 +1,269 @@
+/*
+ * Copyright (c) 2021, 2024, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package jdk.internal.random;
+
+import java.util.concurrent.atomic.AtomicLong;
+import java.util.random.RandomGenerator;
+import java.util.random.RandomGenerator.LeapableGenerator;
+import jdk.internal.util.random.RandomSupport;
+
+/**
+ * A "jumpable and leapable" pseudorandom number generator (PRNG) whose period
+ * is roughly 2<sup>128</sup>.  Class {@link Xoroshiro128PlusPlus} implements
+ * interfaces {@link RandomGenerator} and {@link LeapableGenerator},
+ * and therefore supports methods for producing pseudorandomly chosen
+ * numbers of type {@code int}, {@code long}, {@code float}, and {@code double}
+ * as well as creating new {@link Xoroshiro128PlusPlus} objects
+ * by "jumping" or "leaping".
+ * <p>
+ * The class {@link Xoroshiro128PlusPlus} uses the {@code xoroshiro128} algorithm
+ * (parameters 49, 21, 28) with the "++" scrambler that computes
+ * {@code Long.rotateLeft(s0 + s1, 17) + s0}.
+ * (See David Blackman and Sebastiano Vigna, "Scrambled Linear Pseudorandom
+ * Number Generators," ACM Transactions on Mathematical Software, 2021.)
+ * Its state consists of two {@code long} fields {@code x0} and {@code x1},
+ * which can take on any values provided that they are not both zero.
+ * The period of this generator is 2<sup>128</sup>-1.
+ * <p>
+ * The 64-bit values produced by the {@code nextLong()} method are equidistributed.
+ * To be precise, over the course of the cycle of length 2<sup>128</sup>-1,
+ * each nonzero {@code long} value is generated 2<sup>64</sup> times,
+ * but the value 0 is generated only 2<sup>64</sup>-1 times.
+ * The values produced by the {@code nextInt()}, {@code nextFloat()}, and {@code nextDouble()}
+ * methods are likewise equidistributed.
+ * <p>
+ * Instances {@link Xoroshiro128PlusPlus} are <em>not</em> thread-safe.
+ * They are designed to be used so that each thread as its own instance.
+ * The methods {@link #jump} and {@link #leap} and {@link #jumps} and {@link #leaps}
+ * can be used to construct new instances of {@link Xoroshiro128PlusPlus} that traverse
+ * other parts of the state cycle.
+ * <p>
+ * Instances of {@link Xoroshiro128PlusPlus} are not cryptographically
+ * secure.  Consider instead using {@link java.security.SecureRandom}
+ * in security-sensitive applications. Additionally,
+ * default-constructed instances do not use a cryptographically random
+ * seed unless the {@linkplain System#getProperty system property}
+ * {@code java.util.secureRandomSeed} is set to {@code true}.
+ *
+ * @since   17
+ *
+ */
+public final class Xoroshiro128PlusPlus implements LeapableGenerator {
+
+    /*
+     * Implementation Overview.
+     *
+     * This is an implementation of the xoroshiro128++ algorithm version 1.0,
+     * written in 2019 by David Blackman and Sebastiano Vigna (vigna@acm.org).
+     *
+     * The jump operation moves the current generator forward by 2*64
+     * steps; this has the same effect as calling nextLong() 2**64
+     * times, but is much faster.  Similarly, the leap operation moves
+     * the current generator forward by 2*96 steps; this has the same
+     * effect as calling nextLong() 2**96 times, but is much faster.
+     * The copy method may be used to make a copy of the current
+     * generator.  Thus one may repeatedly and cumulatively copy and
+     * jump to produce a sequence of generators whose states are well
+     * spaced apart along the overall state cycle (indeed, the jumps()
+     * and leaps() methods each produce a stream of such generators).
+     * The generators can then be parceled out to other threads.
+     *
+     * File organization: First the non-public methods that constitute the
+     * main algorithm, then the public methods.  Note that many methods are
+     * defined by classes {@link AbstractJumpableGenerator} and {@link AbstractGenerator}.
+     */
+
+    /* ---------------- static fields ---------------- */
+
+    /**
+     * Group name.
+     */
+    private static final String GROUP = "Xoroshiro";
+
+    /**
+     * The seed generator for default constructors.
+     */
+    private static final AtomicLong defaultGen = new AtomicLong(RandomSupport.initialSeed());
+
+    /* ---------------- instance fields ---------------- */
+
+    /**
+     * The per-instance state.
+     * At least one of the two fields x0 and x1 must be nonzero.
+     */
+    private long x0, x1;
+
+    /* ---------------- constructors ---------------- */
+
+    /**
+     * Basic constructor that initializes all fields from parameters.
+     * It then adjusts the field values if necessary to ensure that
+     * all constraints on the values of fields are met.
+     *
+     * @param x0 first word of the initial state
+     * @param x1 second word of the initial state
+     */
+    public Xoroshiro128PlusPlus(long x0, long x1) {
+        this.x0 = x0;
+        this.x1 = x1;
+        // If x0 and x1 are both zero, we must choose nonzero values.
+        if ((x0 | x1) == 0) {
+            this.x0 = RandomSupport.GOLDEN_RATIO_64;
+            this.x1 = RandomSupport.SILVER_RATIO_64;
+        }
+    }
+
+    /**
+     * Creates a new instance of {@link Xoroshiro128PlusPlus} using the
+     * specified {@code long} value as the initial seed. Instances of
+     * {@link Xoroshiro128PlusPlus} created with the same seed in the same
+     * program generate identical sequences of values.
+     *
+     * @param seed the initial seed
+     */
+    public Xoroshiro128PlusPlus(long seed) {
+        // Using a value with irregularly spaced 1-bits to xor the seed
+        // argument tends to improve "pedestrian" seeds such as 0 or
+        // other small integers.  We may as well use SILVER_RATIO_64.
+        //
+        // The x values are then filled in as if by a SplitMix PRNG with
+        // GOLDEN_RATIO_64 as the gamma value and Stafford13 as the mixer.
+        this(RandomSupport.mixStafford13(seed ^= RandomSupport.SILVER_RATIO_64),
+             RandomSupport.mixStafford13(seed + RandomSupport.GOLDEN_RATIO_64));
+    }
+
+    /**
+     * Creates a new instance of {@link Xoroshiro128PlusPlus} that is likely to
+     * generate sequences of values that are statistically independent
+     * of those of any other instances in the current program execution,
+     * but may, and typically does, vary across program invocations.
+     */
+    public Xoroshiro128PlusPlus() {
+        // Using GOLDEN_RATIO_64 here gives us a good Weyl sequence of values.
+        this(defaultGen.getAndAdd(RandomSupport.GOLDEN_RATIO_64));
+    }
+
+    /**
+     * Creates a new instance of {@link Xoroshiro128PlusPlus} using the specified array of
+     * initial seed bytes. Instances of {@link Xoroshiro128PlusPlus} created with the same
+     * seed array in the same program execution generate identical sequences of values.
+     *
+     * @param seed the initial seed
+     */
+    public Xoroshiro128PlusPlus(byte[] seed) {
+        // Convert the seed to 2 long values, which are not both zero.
+        long[] data = RandomSupport.convertSeedBytesToLongs(seed, 2, 2);
+        long x0 = data[0], x1 = data[1];
+        this.x0 = x0;
+        this.x1 = x1;
+    }
+
+    /* ---------------- public methods ---------------- */
+
+    public Xoroshiro128PlusPlus copy() {
+        return new Xoroshiro128PlusPlus(x0, x1);
+    }
+
+    /*
+     * The following two comments are quoted from http://prng.di.unimi.it/xoroshiro128plusplus.c
+     */
+
+    /*
+     * To the extent possible under law, the author has dedicated all copyright
+     * and related and neighboring rights to this software to the public domain
+     * worldwide. This software is distributed without any warranty.
+     * <p>
+     * See http://creativecommons.org/publicdomain/zero/1.0/.
+     */
+
+    /*
+     * This is xoroshiro128++ 1.0, one of our all-purpose, rock-solid,
+     * small-state generators. It is extremely (sub-ns) fast and it passes all
+     * tests we are aware of, but its state space is large enough only for
+     * mild parallelism.
+     * <p>
+     * For generating just floating-point numbers, xoroshiro128+ is even
+     * faster (but it has a very mild bias, see notes in the comments).
+     * <p>
+     * The state must be seeded so that it is not everywhere zero. If you have
+     * a 64-bit seed, we suggest to seed a splitmix64 generator and use its
+     * output to fill s.
+     */
+
+    @Override
+    public long nextLong() {
+        final long s0 = x0;
+        long s1 = x1;
+   // Compute the result based on current state information
+   // (this allows the computation to be overlapped with state update).
+   final long result = Long.rotateLeft(s0 + s1, 17) + s0;  // "plusplus" scrambler
+
+        s1 ^= s0;
+        x0 = Long.rotateLeft(s0, 49) ^ s1 ^ (s1 << 21); // a, b
+        x1 = Long.rotateLeft(s1, 28); // c
+
+        return result;
+    }
+
+    @Override
+    public double jumpDistance() {
+        return 0x1.0p64;
+    }
+
+    @Override
+    public double leapDistance() {
+        return 0x1.0p96;
+    }
+
+    private static final long[] JUMP_TABLE = { 0x2bd7a6a6e99c2ddcL, 0x0992ccaf6a6fca05L };
+
+    private static final long[] LEAP_TABLE = { 0x360fd5f2cf8d5d99L, 0x9c6e6877736c46e3L };
+
+    @Override
+    public void jump() {
+        jumpAlgorithm(JUMP_TABLE);
+    }
+
+    @Override
+    public void leap() {
+        jumpAlgorithm(LEAP_TABLE);
+    }
+
+    private void jumpAlgorithm(long[] table) {
+        long s0 = 0, s1 = 0;
+        for (int i = 0; i < table.length; i++) {
+            for (int b = 0; b < 64; b++) {
+                if ((table[i] & (1L << b)) != 0) {
+                    s0 ^= x0;
+                    s1 ^= x1;
+                }
+                nextLong();
+            }
+        }
+       x0 = s0;
+       x1 = s1;
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/random/Xoshiro256PlusPlus.class b/tests/test_data/std/jdk/internal/random/Xoshiro256PlusPlus.class
new file mode 100644
index 0000000000000000000000000000000000000000..9f11818e9929506e1a7e1b0de1c03fdba377650a
GIT binary patch
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diff --git a/tests/test_data/std/jdk/internal/random/Xoshiro256PlusPlus.java b/tests/test_data/std/jdk/internal/random/Xoshiro256PlusPlus.java
new file mode 100644
index 00000000..1ae4aeaa
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/random/Xoshiro256PlusPlus.java
@@ -0,0 +1,300 @@
+/*
+ * Copyright (c) 2021, 2024, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package jdk.internal.random;
+
+import java.util.concurrent.atomic.AtomicLong;
+import java.util.random.RandomGenerator;
+import java.util.random.RandomGenerator.LeapableGenerator;
+import jdk.internal.util.random.RandomSupport;
+
+/**
+ * A "jumpable and leapable" pseudorandom number generator (PRNG) whose period
+ * is roughly 2<sup>256</sup>.  Class {@link Xoshiro256PlusPlus} implements
+ * interfaces {@link RandomGenerator} and {@link LeapableGenerator},
+ * and therefore supports methods for producing pseudorandomly chosen
+ * values of type {@code int}, {@code long}, {@code float}, {@code double},
+ * and {@code boolean} (and for producing streams of pseudorandomly chosen
+ * numbers of type {@code int}, {@code long}, and {@code double}),
+ * as well as methods for creating new {@link Xoshiro256PlusPlus} objects
+ * by moving forward either a large distance (2<sup>128</sup>) or a very large
+ * distance (2<sup>192</sup>) around the state cycle.
+ * <p>
+ * Series of generated values pass the TestU01 BigCrush and PractRand test suites
+ * that measure independence and uniformity properties of random number generators.
+ * (Most recently validated with
+ * <a href="http://simul.iro.umontreal.ca/testu01/tu01.html">version 1.2.3 of TestU01</a>
+ * and <a href="http://pracrand.sourceforge.net">version 0.90 of PractRand</a>.
+ * Note that TestU01 BigCrush was used to test not only values produced by the {@code nextLong()}
+ * method but also the result of bit-reversing each value produced by {@code nextLong()}.)
+ * These tests validate only the methods for certain
+ * types and ranges, but similar properties are expected to hold, at
+ * least approximately, for others as well.
+ * <p>
+ * The class {@link Xoshiro256PlusPlus} uses the {@code xoshiro256} algorithm,
+ * version 1.0 (parameters 17, 45), with the "++" scrambler that computes
+ * {@code Long.rotateLeft(s0 + s3, 23) + s0}.
+ * (See David Blackman and Sebastiano Vigna, "Scrambled Linear Pseudorandom
+ * Number Generators," ACM Transactions on Mathematical Software, 2021.)
+ * Its state consists of four {@code long} fields {@code x0}, {@code x1}, {@code x2},
+ * and {@code x3}, which can take on any values provided that they are not all zero.
+ * The period of this generator is 2<sup>256</sup>-1.
+ * <p>
+ * The 64-bit values produced by the {@code nextLong()} method are equidistributed.
+ * To be precise, over the course of the cycle of length 2<sup>256</sup>-1,
+ * each nonzero {@code long} value is generated 2<sup>192</sup> times,
+ * but the value 0 is generated only 2<sup>192</sup>-1 times.
+ * The values produced by the {@code nextInt()}, {@code nextFloat()}, and {@code nextDouble()}
+ * methods are likewise equidistributed.
+ * Moreover, the 64-bit values produced by the {@code nextLong()} method are 3-equidistributed.
+ * <p>
+ * Instances {@link Xoshiro256PlusPlus} are <em>not</em> thread-safe.
+ * They are designed to be used so that each thread as its own instance.
+ * The methods {@link #jump} and {@link #leap} and {@link #jumps} and {@link #leaps}
+ * can be used to construct new instances of {@link Xoshiro256PlusPlus} that traverse
+ * other parts of the state cycle.
+ * <p>
+ * Instances of {@link Xoshiro256PlusPlus} are not cryptographically
+ * secure.  Consider instead using {@link java.security.SecureRandom}
+ * in security-sensitive applications. Additionally,
+ * default-constructed instances do not use a cryptographically random
+ * seed unless the {@linkplain System#getProperty system property}
+ * {@code java.util.secureRandomSeed} is set to {@code true}.
+ *
+ * @since   17
+ *
+ */
+public final class Xoshiro256PlusPlus implements LeapableGenerator {
+
+    /*
+     * Implementation Overview.
+     *
+     * This is an implementation of the xoshiro256++ algorithm version 1.0,
+     * written in 2019 by David Blackman and Sebastiano Vigna (vigna@acm.org).
+     *
+     * The jump operation moves the current generator forward by 2*128
+     * steps; this has the same effect as calling nextLong() 2**128
+     * times, but is much faster.  Similarly, the leap operation moves
+     * the current generator forward by 2*192 steps; this has the same
+     * effect as calling nextLong() 2**192 times, but is much faster.
+     * The copy method may be used to make a copy of the current
+     * generator.  Thus one may repeatedly and cumulatively copy and
+     * jump to produce a sequence of generators whose states are well
+     * spaced apart along the overall state cycle (indeed, the jumps()
+     * and leaps() methods each produce a stream of such generators).
+     * The generators can then be parceled out to other threads.
+     *
+     * File organization: First static fields, then instance
+     * fields, then constructors, then instance methods.
+     */
+
+    /* ---------------- static fields ---------------- */
+
+    /**
+     * The seed generator for default constructors.
+     */
+    private static final AtomicLong DEFAULT_GEN = new AtomicLong(RandomSupport.initialSeed());
+
+    /* ---------------- instance fields ---------------- */
+
+    /**
+     * The per-instance state.
+     * At least one of the four fields x0, x1, x2, and x3 must be nonzero.
+     */
+    private long x0, x1, x2, x3;
+
+    /* ---------------- constructors ---------------- */
+
+    /**
+     * Basic constructor that initializes all fields from parameters.
+     * It then adjusts the field values if necessary to ensure that
+     * all constraints on the values of fields are met.
+     *
+     * @param x0 first word of the initial state
+     * @param x1 second word of the initial state
+     * @param x2 third word of the initial state
+     * @param x3 fourth word of the initial state
+     */
+    public Xoshiro256PlusPlus(long x0, long x1, long x2, long x3) {
+        this.x0 = x0;
+        this.x1 = x1;
+        this.x2 = x2;
+        this.x3 = x3;
+        // If x0, x1, x2, and x3 are all zero, we must choose nonzero values.
+        if ((x0 | x1 | x2 | x3) == 0) {
+            // At least three of the four values generated here will be nonzero.
+            this.x0 = RandomSupport.mixStafford13(x0 += RandomSupport.GOLDEN_RATIO_64);
+            this.x1 = (x0 += RandomSupport.GOLDEN_RATIO_64);
+            this.x2 = (x0 += RandomSupport.GOLDEN_RATIO_64);
+            this.x3 = (x0 += RandomSupport.GOLDEN_RATIO_64);
+        }
+    }
+
+    /**
+     * Creates a new instance of {@link Xoshiro256PlusPlus} using the
+     * specified {@code long} value as the initial seed. Instances of
+     * {@link Xoshiro256PlusPlus} created with the same seed in the same
+     * program generate identical sequences of values.
+     *
+     * @param seed the initial seed
+     */
+    public Xoshiro256PlusPlus(long seed) {
+        // Using a value with irregularly spaced 1-bits to xor the seed
+        // argument tends to improve "pedestrian" seeds such as 0 or
+        // other small integers.  We may as well use SILVER_RATIO_64.
+        //
+        // The x values are then filled in as if by a SplitMix PRNG with
+        // GOLDEN_RATIO_64 as the gamma value and Stafford13 as the mixer.
+        this(RandomSupport.mixStafford13(seed ^= RandomSupport.SILVER_RATIO_64),
+             RandomSupport.mixStafford13(seed += RandomSupport.GOLDEN_RATIO_64),
+             RandomSupport.mixStafford13(seed += RandomSupport.GOLDEN_RATIO_64),
+             RandomSupport.mixStafford13(seed + RandomSupport.GOLDEN_RATIO_64));
+    }
+
+    /**
+     * Creates a new instance of {@link Xoshiro256PlusPlus} that is likely to
+     * generate sequences of values that are statistically independent
+     * of those of any other instances in the current program execution,
+     * but may, and typically does, vary across program invocations.
+     */
+    public Xoshiro256PlusPlus() {
+        // Using GOLDEN_RATIO_64 here gives us a good Weyl sequence of values.
+        this(DEFAULT_GEN.getAndAdd(RandomSupport.GOLDEN_RATIO_64));
+    }
+
+    /**
+     * Creates a new instance of {@link Xoshiro256PlusPlus} using the specified array of
+     * initial seed bytes. Instances of {@link Xoshiro256PlusPlus} created with the same
+     * seed array in the same program execution generate identical sequences of values.
+     *
+     * @param seed the initial seed
+     */
+    public Xoshiro256PlusPlus(byte[] seed) {
+        // Convert the seed to 4 long values, which are not all zero.
+        long[] data = RandomSupport.convertSeedBytesToLongs(seed, 4, 4);
+        long x0 = data[0], x1 = data[1], x2 = data[2], x3 = data[3];
+        this.x0 = x0;
+        this.x1 = x1;
+        this.x2 = x2;
+        this.x3 = x3;
+    }
+
+    /* ---------------- public methods ---------------- */
+
+    public Xoshiro256PlusPlus copy() {
+        return new Xoshiro256PlusPlus(x0, x1, x2, x3);
+    }
+
+    /*
+     * The following two comments are quoted from http://prng.di.unimi.it/xoshiro256plusplus.c
+     */
+
+    /*
+     * To the extent possible under law, the author has dedicated all copyright
+     * and related and neighboring rights to this software to the public domain
+     * worldwide. This software is distributed without any warranty.
+     * <p>
+     * See http://creativecommons.org/publicdomain/zero/1.0/.
+     */
+
+    /*
+     * This is xoshiro256++ 1.0, one of our all-purpose, rock-solid generators.
+     * It has excellent (sub-ns) speed, a state (256 bits) that is large
+     * enough for any parallel application, and it passes all tests we are
+     * aware of.
+     *
+     * For generating just floating-point numbers, xoshiro256+ is even faster.
+     *
+     * The state must be seeded so that it is not everywhere zero. If you have
+     * a 64-bit seed, we suggest to seed a splitmix64 generator and use its
+     * output to fill s.
+     */
+
+    @Override
+    public long nextLong() {
+        // Compute the result based on current state information
+        // (this allows the computation to be overlapped with state update).
+        final long result = Long.rotateLeft(x0 + x3, 23) + x0;  // "plusplus" scrambler
+
+        long q0 = x0, q1 = x1, q2 = x2, q3 = x3;
+        {   // xoshiro256 1.0
+            long t = q1 << 17;
+            q2 ^= q0;
+            q3 ^= q1;
+            q1 ^= q2;
+            q0 ^= q3;
+            q2 ^= t;
+            q3 = Long.rotateLeft(q3, 45);
+        }
+        x0 = q0; x1 = q1; x2 = q2; x3 = q3;
+        return result;
+    }
+
+    @Override
+    public double jumpDistance() {
+        return 0x1.0p128;
+    }
+
+    @Override
+    public double leapDistance() {
+        return 0x1.0p192;
+    }
+
+    private static final long[] JUMP_TABLE = {
+        0x180ec6d33cfd0abaL, 0xd5a61266f0c9392cL, 0xa9582618e03fc9aaL, 0x39abdc4529b1661cL };
+
+    private static final long[] LEAP_TABLE = {
+        0x76e15d3efefdcbbfL, 0xc5004e441c522fb3L, 0x77710069854ee241L, 0x39109bb02acbe635L };
+
+    @Override
+    public void jump() {
+        jumpAlgorithm(JUMP_TABLE);
+    }
+
+    @Override
+    public void leap() {
+        jumpAlgorithm(LEAP_TABLE);
+    }
+
+    private void jumpAlgorithm(long[] table) {
+        long s0 = 0, s1 = 0, s2 = 0, s3 = 0;
+        for (int i = 0; i < table.length; i++) {
+            for (int b = 0; b < 64; b++) {
+                if ((table[i] & (1L << b)) != 0) {
+                    s0 ^= x0;
+                    s1 ^= x1;
+                    s2 ^= x2;
+                    s3 ^= x3;
+                }
+                nextLong();
+            }
+        }
+   x0 = s0;
+   x1 = s1;
+   x2 = s2;
+   x3 = s3;
+    }
+
+}
diff --git a/tests/test_data/std/jdk/internal/ref/Cleaner$1.class b/tests/test_data/std/jdk/internal/ref/Cleaner$1.class
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new file mode 100644
index 00000000..3a026055
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/ref/Cleaner.java
@@ -0,0 +1,156 @@
+/*
+ * Copyright (c) 2003, 2021, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package jdk.internal.ref;
+
+import java.lang.ref.*;
+import java.security.AccessController;
+import java.security.PrivilegedAction;
+
+
+/**
+ * General-purpose phantom-reference-based cleaners.
+ *
+ * <p> Cleaners are a lightweight and more robust alternative to finalization.
+ * They are lightweight because they are not created by the VM and thus do not
+ * require a JNI upcall to be created, and because their cleanup code is
+ * invoked directly by the reference-handler thread rather than by the
+ * finalizer thread.  They are more robust because they use phantom references,
+ * the weakest type of reference object, thereby avoiding the nasty ordering
+ * problems inherent to finalization.
+ *
+ * <p> A cleaner tracks a referent object and encapsulates a thunk of arbitrary
+ * cleanup code.  Some time after the GC detects that a cleaner's referent has
+ * become phantom-reachable, the reference-handler thread will run the cleaner.
+ * Cleaners may also be invoked directly; they are thread safe and ensure that
+ * they run their thunks at most once.
+ *
+ * <p> Cleaners are not a replacement for finalization.  They should be used
+ * only when the cleanup code is extremely simple and straightforward.
+ * Nontrivial cleaners are inadvisable since they risk blocking the
+ * reference-handler thread and delaying further cleanup and finalization.
+ *
+ *
+ * @author Mark Reinhold
+ */
+
+public class Cleaner
+    extends PhantomReference<Object>
+{
+
+    // Dummy reference queue, needed because the PhantomReference constructor
+    // insists that we pass a queue.  Nothing will ever be placed on this queue
+    // since the reference handler invokes cleaners explicitly.
+    //
+    private static final ReferenceQueue<Object> dummyQueue = new ReferenceQueue<>();
+
+    // Doubly-linked list of live cleaners, which prevents the cleaners
+    // themselves from being GC'd before their referents
+    //
+    private static Cleaner first = null;
+
+    private Cleaner
+        next = null,
+        prev = null;
+
+    private static synchronized Cleaner add(Cleaner cl) {
+        if (first != null) {
+            cl.next = first;
+            first.prev = cl;
+        }
+        first = cl;
+        return cl;
+    }
+
+    private static synchronized boolean remove(Cleaner cl) {
+
+        // If already removed, do nothing
+        if (cl.next == cl)
+            return false;
+
+        // Update list
+        if (first == cl) {
+            if (cl.next != null)
+                first = cl.next;
+            else
+                first = cl.prev;
+        }
+        if (cl.next != null)
+            cl.next.prev = cl.prev;
+        if (cl.prev != null)
+            cl.prev.next = cl.next;
+
+        // Indicate removal by pointing the cleaner to itself
+        cl.next = cl;
+        cl.prev = cl;
+        return true;
+
+    }
+
+    private final Runnable thunk;
+
+    private Cleaner(Object referent, Runnable thunk) {
+        super(referent, dummyQueue);
+        this.thunk = thunk;
+    }
+
+    /**
+     * Creates a new cleaner.
+     *
+     * @param  ob the referent object to be cleaned
+     * @param  thunk
+     *         The cleanup code to be run when the cleaner is invoked.  The
+     *         cleanup code is run directly from the reference-handler thread,
+     *         so it should be as simple and straightforward as possible.
+     *
+     * @return  The new cleaner
+     */
+    public static Cleaner create(Object ob, Runnable thunk) {
+        if (thunk == null)
+            return null;
+        return add(new Cleaner(ob, thunk));
+    }
+
+    /**
+     * Runs this cleaner, if it has not been run before.
+     */
+    @SuppressWarnings("removal")
+    public void clean() {
+        if (!remove(this))
+            return;
+        try {
+            thunk.run();
+        } catch (final Throwable x) {
+            AccessController.doPrivileged(new PrivilegedAction<>() {
+                    public Void run() {
+                        if (System.err != null)
+                            new Error("Cleaner terminated abnormally", x)
+                                .printStackTrace();
+                        System.exit(1);
+                        return null;
+                    }});
+        }
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/ref/CleanerFactory$1.class b/tests/test_data/std/jdk/internal/ref/CleanerFactory$1.class
new file mode 100644
index 0000000000000000000000000000000000000000..88db9e681a4c83596822f969959072ff7e23331b
GIT binary patch
literal 790
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literal 0
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diff --git a/tests/test_data/std/jdk/internal/ref/CleanerFactory.class b/tests/test_data/std/jdk/internal/ref/CleanerFactory.class
new file mode 100644
index 0000000000000000000000000000000000000000..e0b55d8872b2a05501e1ac50a9e58cd0a7f36a3a
GIT binary patch
literal 713
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/ref/CleanerFactory.java b/tests/test_data/std/jdk/internal/ref/CleanerFactory.java
new file mode 100644
index 00000000..6a3534b1
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/ref/CleanerFactory.java
@@ -0,0 +1,60 @@
+/*
+ * Copyright (c) 2016, 2021, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package jdk.internal.ref;
+
+import jdk.internal.misc.InnocuousThread;
+
+import java.lang.ref.Cleaner;
+import java.util.concurrent.ThreadFactory;
+
+/**
+ * CleanerFactory provides a Cleaner for use within system modules.
+ * The cleaner is created on the first reference to the CleanerFactory.
+ */
+public final class CleanerFactory {
+
+    /* The common Cleaner. */
+    private static final Cleaner commonCleaner = Cleaner.create(new ThreadFactory() {
+        @Override
+        public Thread newThread(Runnable r) {
+            return InnocuousThread.newSystemThread("Common-Cleaner",
+                    r, Thread.MAX_PRIORITY - 2);
+        }
+    });
+
+    /**
+     * Cleaner for use within system modules.
+     *
+     * This Cleaner will run on a thread whose context class loader
+     * is {@code null}. The system cleaning action to perform in
+     * this Cleaner should handle a {@code null} context class loader.
+     *
+     * @return a Cleaner for use within system modules
+     */
+    public static Cleaner cleaner() {
+        return commonCleaner;
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/ref/CleanerImpl$CleanerCleanable.class b/tests/test_data/std/jdk/internal/ref/CleanerImpl$CleanerCleanable.class
new file mode 100644
index 0000000000000000000000000000000000000000..655fb1ba5b0e225ae96e0f1e11aa5f2bb7f16a52
GIT binary patch
literal 731
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/ref/CleanerImpl$InnocuousThreadFactory.class b/tests/test_data/std/jdk/internal/ref/CleanerImpl$InnocuousThreadFactory.class
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index 0000000000000000000000000000000000000000..2a4c96fd9bd813c1e8dbdf363bfc83c6eee59ae9
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literal 0
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diff --git a/tests/test_data/std/jdk/internal/ref/CleanerImpl$PhantomCleanableRef.class b/tests/test_data/std/jdk/internal/ref/CleanerImpl$PhantomCleanableRef.class
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diff --git a/tests/test_data/std/jdk/internal/ref/CleanerImpl.class b/tests/test_data/std/jdk/internal/ref/CleanerImpl.class
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/ref/CleanerImpl.java b/tests/test_data/std/jdk/internal/ref/CleanerImpl.java
new file mode 100644
index 00000000..b4565daa
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/ref/CleanerImpl.java
@@ -0,0 +1,234 @@
+/*
+ * Copyright (c) 2015, 2020, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package jdk.internal.ref;
+
+import java.lang.ref.Cleaner;
+import java.lang.ref.Cleaner.Cleanable;
+import java.lang.ref.ReferenceQueue;
+import java.security.AccessController;
+import java.security.PrivilegedAction;
+import java.util.concurrent.ThreadFactory;
+import java.util.concurrent.atomic.AtomicInteger;
+import java.util.function.Function;
+
+import jdk.internal.misc.InnocuousThread;
+
+/**
+ * CleanerImpl manages a set of object references and corresponding cleaning actions.
+ * CleanerImpl provides the functionality of {@link java.lang.ref.Cleaner}.
+ */
+public final class CleanerImpl implements Runnable {
+
+    /**
+     * An object to access the CleanerImpl from a Cleaner; set by Cleaner init.
+     */
+    private static Function<Cleaner, CleanerImpl> cleanerImplAccess = null;
+
+    /**
+     * Heads of a CleanableList for each reference type.
+     */
+    final PhantomCleanable<?> phantomCleanableList;
+
+    // The ReferenceQueue of pending cleaning actions
+    final ReferenceQueue<Object> queue;
+
+    /**
+     * Called by Cleaner static initialization to provide the function
+     * to map from Cleaner to CleanerImpl.
+     * @param access a function to map from Cleaner to CleanerImpl
+     */
+    public static void setCleanerImplAccess(Function<Cleaner, CleanerImpl> access) {
+        if (cleanerImplAccess == null) {
+            cleanerImplAccess = access;
+        } else {
+            throw new InternalError("cleanerImplAccess");
+        }
+    }
+
+    /**
+     * Called to get the CleanerImpl for a Cleaner.
+     * @param cleaner the cleaner
+     * @return the corresponding CleanerImpl
+     */
+    static CleanerImpl getCleanerImpl(Cleaner cleaner) {
+        return cleanerImplAccess.apply(cleaner);
+    }
+
+    /**
+     * Constructor for CleanerImpl.
+     */
+    public CleanerImpl() {
+        queue = new ReferenceQueue<>();
+        phantomCleanableList = new PhantomCleanableRef();
+    }
+
+    /**
+     * Starts the Cleaner implementation.
+     * Ensure this is the CleanerImpl for the Cleaner.
+     * When started waits for Cleanables to be queued.
+     * @param cleaner the cleaner
+     * @param threadFactory the thread factory
+     */
+    public void start(Cleaner cleaner, ThreadFactory threadFactory) {
+        if (getCleanerImpl(cleaner) != this) {
+            throw new AssertionError("wrong cleaner");
+        }
+        // schedule a nop cleaning action for the cleaner, so the associated thread
+        // will continue to run at least until the cleaner is reclaimable.
+        new CleanerCleanable(cleaner);
+
+        if (threadFactory == null) {
+            threadFactory = CleanerImpl.InnocuousThreadFactory.factory();
+        }
+
+        // now that there's at least one cleaning action, for the cleaner,
+        // we can start the associated thread, which runs until
+        // all cleaning actions have been run.
+        Thread thread = threadFactory.newThread(this);
+        thread.setDaemon(true);
+        thread.start();
+    }
+
+    /**
+     * Process queued Cleanables as long as the cleanable lists are not empty.
+     * A Cleanable is in one of the lists for each Object and for the Cleaner
+     * itself.
+     * Terminates when the Cleaner is no longer reachable and
+     * has been cleaned and there are no more Cleanable instances
+     * for which the object is reachable.
+     * <p>
+     * If the thread is a ManagedLocalsThread, the threadlocals
+     * are erased before each cleanup
+     */
+    @Override
+    public void run() {
+        Thread t = Thread.currentThread();
+        InnocuousThread mlThread = (t instanceof InnocuousThread)
+                ? (InnocuousThread) t
+                : null;
+        while (!phantomCleanableList.isListEmpty()) {
+            if (mlThread != null) {
+                // Clear the thread locals
+                mlThread.eraseThreadLocals();
+            }
+            try {
+                // Wait for a Ref, with a timeout to avoid getting hung
+                // due to a race with clear/clean
+                Cleanable ref = (Cleanable) queue.remove(60 * 1000L);
+                if (ref != null) {
+                    ref.clean();
+                }
+            } catch (Throwable e) {
+                // ignore exceptions from the cleanup action
+                // (including interruption of cleanup thread)
+            }
+        }
+    }
+
+    /**
+     * Perform cleaning on an unreachable PhantomReference.
+     */
+    public static final class PhantomCleanableRef extends PhantomCleanable<Object> {
+        private final Runnable action;
+
+        /**
+         * Constructor for a phantom cleanable reference.
+         * @param obj the object to monitor
+         * @param cleaner the cleaner
+         * @param action the action Runnable
+         */
+        public PhantomCleanableRef(Object obj, Cleaner cleaner, Runnable action) {
+            super(obj, cleaner);
+            this.action = action;
+        }
+
+        /**
+         * Constructor used only for root of phantom cleanable list.
+         */
+        PhantomCleanableRef() {
+            super();
+            this.action = null;
+        }
+
+        @Override
+        protected void performCleanup() {
+            action.run();
+        }
+
+        /**
+         * Prevent access to referent even when it is still alive.
+         *
+         * @throws UnsupportedOperationException always
+         */
+        @Override
+        public Object get() {
+            throw new UnsupportedOperationException("get");
+        }
+
+        /**
+         * Direct clearing of the referent is not supported.
+         *
+         * @throws UnsupportedOperationException always
+         */
+        @Override
+        public void clear() {
+            throw new UnsupportedOperationException("clear");
+        }
+    }
+
+    /**
+     * A ThreadFactory for InnocuousThreads.
+     * The factory is a singleton.
+     */
+    static final class InnocuousThreadFactory implements ThreadFactory {
+        static final ThreadFactory factory = new InnocuousThreadFactory();
+
+        static ThreadFactory factory() {
+            return factory;
+        }
+
+        final AtomicInteger cleanerThreadNumber = new AtomicInteger();
+
+        public Thread newThread(Runnable r) {
+            return InnocuousThread.newThread("Cleaner-" + cleanerThreadNumber.getAndIncrement(),
+                r, Thread.MAX_PRIORITY - 2);
+        }
+    }
+
+    /**
+     * A PhantomCleanable implementation for tracking the Cleaner itself.
+     */
+    static final class CleanerCleanable extends PhantomCleanable<Cleaner> {
+        CleanerCleanable(Cleaner cleaner) {
+            super(cleaner, cleaner);
+        }
+
+        @Override
+        protected void performCleanup() {
+            // no action
+        }
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/ref/PhantomCleanable.class b/tests/test_data/std/jdk/internal/ref/PhantomCleanable.class
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diff --git a/tests/test_data/std/jdk/internal/ref/PhantomCleanable.java b/tests/test_data/std/jdk/internal/ref/PhantomCleanable.java
new file mode 100644
index 00000000..24db6d8e
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/ref/PhantomCleanable.java
@@ -0,0 +1,180 @@
+/*
+ * Copyright (c) 2015, 2016, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package jdk.internal.ref;
+
+import java.lang.ref.Cleaner;
+import java.lang.ref.Reference;
+import java.lang.ref.PhantomReference;
+import java.util.Objects;
+
+/**
+ * PhantomCleanable subclasses efficiently encapsulate cleanup state and
+ * the cleaning action.
+ * Subclasses implement the abstract {@link #performCleanup()}  method
+ * to provide the cleaning action.
+ * When constructed, the object reference and the {@link Cleaner.Cleanable Cleanable}
+ * are registered with the {@link Cleaner}.
+ * The Cleaner invokes {@link Cleaner.Cleanable#clean() clean} after the
+ * referent becomes phantom reachable.
+ */
+public abstract class PhantomCleanable<T> extends PhantomReference<T>
+        implements Cleaner.Cleanable {
+
+    /**
+     * Links to previous and next in a doubly-linked list.
+     */
+    PhantomCleanable<?> prev = this, next = this;
+
+    /**
+     * The list of PhantomCleanable; synchronizes insert and remove.
+     */
+    private final PhantomCleanable<?> list;
+
+    /**
+     * Constructs new {@code PhantomCleanable} with
+     * {@code non-null referent} and {@code non-null cleaner}.
+     * The {@code cleaner} is not retained; it is only used to
+     * register the newly constructed {@link Cleaner.Cleanable Cleanable}.
+     *
+     * @param referent the referent to track
+     * @param cleaner  the {@code Cleaner} to register with
+     */
+    public PhantomCleanable(T referent, Cleaner cleaner) {
+        super(Objects.requireNonNull(referent), CleanerImpl.getCleanerImpl(cleaner).queue);
+        this.list = CleanerImpl.getCleanerImpl(cleaner).phantomCleanableList;
+        insert();
+
+        // Ensure referent and cleaner remain accessible
+        Reference.reachabilityFence(referent);
+        Reference.reachabilityFence(cleaner);
+    }
+
+    /**
+     * Construct a new root of the list; not inserted.
+     */
+    PhantomCleanable() {
+        super(null, null);
+        this.list = this;
+    }
+
+    /**
+     * Insert this PhantomCleanable after the list head.
+     */
+    private void insert() {
+        synchronized (list) {
+            prev = list;
+            next = list.next;
+            next.prev = this;
+            list.next = this;
+        }
+    }
+
+    /**
+     * Remove this PhantomCleanable from the list.
+     *
+     * @return true if Cleanable was removed or false if not because
+     * it had already been removed before
+     */
+    private boolean remove() {
+        synchronized (list) {
+            if (next != this) {
+                next.prev = prev;
+                prev.next = next;
+                prev = this;
+                next = this;
+                return true;
+            }
+            return false;
+        }
+    }
+
+    /**
+     * Returns true if the list's next reference refers to itself.
+     *
+     * @return true if the list is empty
+     */
+    boolean isListEmpty() {
+        synchronized (list) {
+            return list == list.next;
+        }
+    }
+
+    /**
+     * Unregister this PhantomCleanable and invoke {@link #performCleanup()},
+     * ensuring at-most-once semantics.
+     */
+    @Override
+    public final void clean() {
+        if (remove()) {
+            super.clear();
+            performCleanup();
+        }
+    }
+
+    /**
+     * Unregister this PhantomCleanable and clear the reference.
+     * Due to inherent concurrency, {@link #performCleanup()} may still be invoked.
+     */
+    @Override
+    public void clear() {
+        if (remove()) {
+            super.clear();
+        }
+    }
+
+    /**
+     * The {@code performCleanup} abstract method is overridden
+     * to implement the cleaning logic.
+     * The {@code performCleanup} method should not be called except
+     * by the {@link #clean} method which ensures at most once semantics.
+     */
+    protected abstract void performCleanup();
+
+    /**
+     * This method always throws {@link UnsupportedOperationException}.
+     * Enqueuing details of {@link Cleaner.Cleanable}
+     * are a private implementation detail.
+     *
+     * @throws UnsupportedOperationException always
+     */
+    @SuppressWarnings("deprecation")
+    @Override
+    public final boolean isEnqueued() {
+        throw new UnsupportedOperationException("isEnqueued");
+    }
+
+    /**
+     * This method always throws {@link UnsupportedOperationException}.
+     * Enqueuing details of {@link Cleaner.Cleanable}
+     * are a private implementation detail.
+     *
+     * @throws UnsupportedOperationException always
+     */
+    @Override
+    public final boolean enqueue() {
+        throw new UnsupportedOperationException("enqueue");
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/reflect/AccessorGenerator.class b/tests/test_data/std/jdk/internal/reflect/AccessorGenerator.class
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HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/reflect/AccessorGenerator.java b/tests/test_data/std/jdk/internal/reflect/AccessorGenerator.java
new file mode 100644
index 00000000..d87e0fd1
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/reflect/AccessorGenerator.java
@@ -0,0 +1,722 @@
+/*
+ * Copyright (c) 2001, 2023, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package jdk.internal.reflect;
+
+import java.lang.reflect.*;
+import jdk.internal.misc.Unsafe;
+
+/** Shared functionality for all accessor generators */
+
+class AccessorGenerator implements ClassFileConstants {
+    static final Unsafe unsafe = Unsafe.getUnsafe();
+
+    // Constants because there's no way to say "short integer constant",
+    // i.e., "1S"
+    protected static final short S0 = (short) 0;
+    protected static final short S1 = (short) 1;
+    protected static final short S2 = (short) 2;
+    protected static final short S3 = (short) 3;
+    protected static final short S4 = (short) 4;
+    protected static final short S5 = (short) 5;
+    protected static final short S6 = (short) 6;
+
+    // Instance variables for shared functionality
+    protected ClassFileAssembler asm;
+    protected int   modifiers;
+    protected short thisClass;
+    protected short superClass;
+    protected short targetClass;
+    // Common constant pool entries to FieldAccessor and MethodAccessor
+    protected short throwableClass;
+    protected short classCastClass;
+    protected short nullPointerClass;
+    protected short illegalArgumentClass;
+    protected short invocationTargetClass;
+    protected short initIdx;
+    protected short initNameAndTypeIdx;
+    protected short initStringNameAndTypeIdx;
+    protected short nullPointerCtorIdx;
+    protected short illegalArgumentCtorIdx;
+    protected short illegalArgumentStringCtorIdx;
+    protected short invocationTargetCtorIdx;
+    protected short superCtorIdx;
+    protected short objectClass;
+    protected short toStringIdx;
+    protected short codeIdx;
+    protected short exceptionsIdx;
+    // Boxing
+    protected short valueOfIdx;
+    protected short booleanIdx;
+    protected short booleanBoxIdx;
+    protected short booleanUnboxIdx;
+    protected short byteIdx;
+    protected short byteBoxIdx;
+    protected short byteUnboxIdx;
+    protected short characterIdx;
+    protected short characterBoxIdx;
+    protected short characterUnboxIdx;
+    protected short doubleIdx;
+    protected short doubleBoxIdx;
+    protected short doubleUnboxIdx;
+    protected short floatIdx;
+    protected short floatBoxIdx;
+    protected short floatUnboxIdx;
+    protected short integerIdx;
+    protected short integerBoxIdx;
+    protected short integerUnboxIdx;
+    protected short longIdx;
+    protected short longBoxIdx;
+    protected short longUnboxIdx;
+    protected short shortIdx;
+    protected short shortBoxIdx;
+    protected short shortUnboxIdx;
+
+    protected final short NUM_COMMON_CPOOL_ENTRIES = (short) 30;
+    protected final short NUM_BOXING_CPOOL_ENTRIES = (short) 73;
+
+    // Requires that superClass has been set up
+    protected void emitCommonConstantPoolEntries() {
+        // +   [UTF-8] "java/lang/Throwable"
+        // +   [CONSTANT_Class_info] for above
+        // +   [UTF-8] "java/lang/ClassCastException"
+        // +   [CONSTANT_Class_info] for above
+        // +   [UTF-8] "java/lang/NullPointerException"
+        // +   [CONSTANT_Class_info] for above
+        // +   [UTF-8] "java/lang/IllegalArgumentException"
+        // +   [CONSTANT_Class_info] for above
+        // +   [UTF-8] "java/lang/InvocationTargetException"
+        // +   [CONSTANT_Class_info] for above
+        // +   [UTF-8] "<init>"
+        // +   [UTF-8] "()V"
+        // +   [CONSTANT_NameAndType_info] for above
+        // +   [CONSTANT_Methodref_info] for NullPointerException's constructor
+        // +   [CONSTANT_Methodref_info] for IllegalArgumentException's constructor
+        // +   [UTF-8] "(Ljava/lang/String;)V"
+        // +   [CONSTANT_NameAndType_info] for "<init>(Ljava/lang/String;)V"
+        // +   [CONSTANT_Methodref_info] for IllegalArgumentException's constructor taking a String
+        // +   [UTF-8] "(Ljava/lang/Throwable;)V"
+        // +   [CONSTANT_NameAndType_info] for "<init>(Ljava/lang/Throwable;)V"
+        // +   [CONSTANT_Methodref_info] for InvocationTargetException's constructor
+        // +   [CONSTANT_Methodref_info] for "super()"
+        // +   [UTF-8] "java/lang/Object"
+        // +   [CONSTANT_Class_info] for above
+        // +   [UTF-8] "toString"
+        // +   [UTF-8] "()Ljava/lang/String;"
+        // +   [CONSTANT_NameAndType_info] for "toString()Ljava/lang/String;"
+        // +   [CONSTANT_Methodref_info] for Object's toString method
+        // +   [UTF-8] "Code"
+        // +   [UTF-8] "Exceptions"
+        asm.emitConstantPoolUTF8("java/lang/Throwable");
+        asm.emitConstantPoolClass(asm.cpi());
+        throwableClass = asm.cpi();
+        asm.emitConstantPoolUTF8("java/lang/ClassCastException");
+        asm.emitConstantPoolClass(asm.cpi());
+        classCastClass = asm.cpi();
+        asm.emitConstantPoolUTF8("java/lang/NullPointerException");
+        asm.emitConstantPoolClass(asm.cpi());
+        nullPointerClass = asm.cpi();
+        asm.emitConstantPoolUTF8("java/lang/IllegalArgumentException");
+        asm.emitConstantPoolClass(asm.cpi());
+        illegalArgumentClass = asm.cpi();
+        asm.emitConstantPoolUTF8("java/lang/reflect/InvocationTargetException");
+        asm.emitConstantPoolClass(asm.cpi());
+        invocationTargetClass = asm.cpi();
+        asm.emitConstantPoolUTF8("<init>");
+        initIdx = asm.cpi();
+        asm.emitConstantPoolUTF8("()V");
+        asm.emitConstantPoolNameAndType(initIdx, asm.cpi());
+        initNameAndTypeIdx = asm.cpi();
+        asm.emitConstantPoolMethodref(nullPointerClass, initNameAndTypeIdx);
+        nullPointerCtorIdx = asm.cpi();
+        asm.emitConstantPoolMethodref(illegalArgumentClass, initNameAndTypeIdx);
+        illegalArgumentCtorIdx = asm.cpi();
+        asm.emitConstantPoolUTF8("(Ljava/lang/String;)V");
+        asm.emitConstantPoolNameAndType(initIdx, asm.cpi());
+        initStringNameAndTypeIdx = asm.cpi();
+        asm.emitConstantPoolMethodref(illegalArgumentClass, initStringNameAndTypeIdx);
+        illegalArgumentStringCtorIdx = asm.cpi();
+        asm.emitConstantPoolUTF8("(Ljava/lang/Throwable;)V");
+        asm.emitConstantPoolNameAndType(initIdx, asm.cpi());
+        asm.emitConstantPoolMethodref(invocationTargetClass, asm.cpi());
+        invocationTargetCtorIdx = asm.cpi();
+        asm.emitConstantPoolMethodref(superClass, initNameAndTypeIdx);
+        superCtorIdx = asm.cpi();
+        asm.emitConstantPoolUTF8("java/lang/Object");
+        asm.emitConstantPoolClass(asm.cpi());
+        objectClass = asm.cpi();
+        asm.emitConstantPoolUTF8("toString");
+        asm.emitConstantPoolUTF8("()Ljava/lang/String;");
+        asm.emitConstantPoolNameAndType(sub(asm.cpi(), S1), asm.cpi());
+        asm.emitConstantPoolMethodref(objectClass, asm.cpi());
+        toStringIdx = asm.cpi();
+        asm.emitConstantPoolUTF8("Code");
+        codeIdx = asm.cpi();
+        asm.emitConstantPoolUTF8("Exceptions");
+        exceptionsIdx = asm.cpi();
+    }
+
+    /** Constant pool entries required to be able to box/unbox primitive
+        types. Note that we don't emit these if we don't need them. */
+    protected void emitBoxingContantPoolEntries() {
+        //  *  [UTF-8] "valueOf"
+        //  *  [UTF-8] "java/lang/Boolean"
+        //  *  [CONSTANT_Class_info] for above
+        //  *  [UTF-8] "(Z)Ljava/lang/Boolean;"
+        //  *  [CONSTANT_NameAndType_info] for above
+        //  *  [CONSTANT_Methodref_info] for above
+        //  *  [UTF-8] "booleanValue"
+        //  *  [UTF-8] "()Z"
+        //  *  [CONSTANT_NameAndType_info] for above
+        //  *  [CONSTANT_Methodref_info] for above
+        //  *  [UTF-8] "java/lang/Byte"
+        //  *  [CONSTANT_Class_info] for above
+        //  *  [UTF-8] "(B)Ljava/lang/Byte;"
+        //  *  [CONSTANT_NameAndType_info] for above
+        //  *  [CONSTANT_Methodref_info] for above
+        //  *  [UTF-8] "byteValue"
+        //  *  [UTF-8] "()B"
+        //  *  [CONSTANT_NameAndType_info] for above
+        //  *  [CONSTANT_Methodref_info] for above
+        //  *  [UTF-8] "java/lang/Character"
+        //  *  [CONSTANT_Class_info] for above
+        //  *  [UTF-8] "(C)Ljava/lang/Character;"
+        //  *  [CONSTANT_NameAndType_info] for above
+        //  *  [CONSTANT_Methodref_info] for above
+        //  *  [UTF-8] "charValue"
+        //  *  [UTF-8] "()C"
+        //  *  [CONSTANT_NameAndType_info] for above
+        //  *  [CONSTANT_Methodref_info] for above
+        //  *  [UTF-8] "java/lang/Double"
+        //  *  [CONSTANT_Class_info] for above
+        //  *  [UTF-8] "(D)Ljava/lang/Double;"
+        //  *  [CONSTANT_NameAndType_info] for above
+        //  *  [CONSTANT_Methodref_info] for above
+        //  *  [UTF-8] "doubleValue"
+        //  *  [UTF-8] "()D"
+        //  *  [CONSTANT_NameAndType_info] for above
+        //  *  [CONSTANT_Methodref_info] for above
+        //  *  [UTF-8] "java/lang/Float"
+        //  *  [CONSTANT_Class_info] for above
+        //  *  [UTF-8] "(F)Ljava/lang/Float;"
+        //  *  [CONSTANT_NameAndType_info] for above
+        //  *  [CONSTANT_Methodref_info] for above
+        //  *  [UTF-8] "floatValue"
+        //  *  [UTF-8] "()F"
+        //  *  [CONSTANT_NameAndType_info] for above
+        //  *  [CONSTANT_Methodref_info] for above
+        //  *  [UTF-8] "java/lang/Integer"
+        //  *  [CONSTANT_Class_info] for above
+        //  *  [UTF-8] "(I)Ljava/lang/Integer;"
+        //  *  [CONSTANT_NameAndType_info] for above
+        //  *  [CONSTANT_Methodref_info] for above
+        //  *  [UTF-8] "intValue"
+        //  *  [UTF-8] "()I"
+        //  *  [CONSTANT_NameAndType_info] for above
+        //  *  [CONSTANT_Methodref_info] for above
+        //  *  [UTF-8] "java/lang/Long"
+        //  *  [CONSTANT_Class_info] for above
+        //  *  [UTF-8] "(J)Ljava/lang/Long;"
+        //  *  [CONSTANT_NameAndType_info] for above
+        //  *  [CONSTANT_Methodref_info] for above
+        //  *  [UTF-8] "longValue"
+        //  *  [UTF-8] "()J"
+        //  *  [CONSTANT_NameAndType_info] for above
+        //  *  [CONSTANT_Methodref_info] for above
+        //  *  [UTF-8] "java/lang/Short"
+        //  *  [CONSTANT_Class_info] for above
+        //  *  [UTF-8] "(S)Ljava/lang/Short;"
+        //  *  [CONSTANT_NameAndType_info] for above
+        //  *  [CONSTANT_Methodref_info] for above
+        //  *  [UTF-8] "shortValue"
+        //  *  [UTF-8] "()S"
+        //  *  [CONSTANT_NameAndType_info] for above
+        //  *  [CONSTANT_Methodref_info] for above
+
+        // valueOf-method name
+        asm.emitConstantPoolUTF8("valueOf");
+        valueOfIdx = asm.cpi();
+
+        // Boolean
+        asm.emitConstantPoolUTF8("java/lang/Boolean");
+        asm.emitConstantPoolClass(asm.cpi());
+        booleanIdx = asm.cpi();
+        asm.emitConstantPoolUTF8("(Z)Ljava/lang/Boolean;");
+        asm.emitConstantPoolNameAndType(valueOfIdx, asm.cpi());
+        asm.emitConstantPoolMethodref(sub(asm.cpi(), S2), asm.cpi());
+        booleanBoxIdx = asm.cpi();
+        asm.emitConstantPoolUTF8("booleanValue");
+        asm.emitConstantPoolUTF8("()Z");
+        asm.emitConstantPoolNameAndType(sub(asm.cpi(), S1), asm.cpi());
+        asm.emitConstantPoolMethodref(sub(asm.cpi(), S6), asm.cpi());
+        booleanUnboxIdx = asm.cpi();
+
+        // Byte
+        asm.emitConstantPoolUTF8("java/lang/Byte");
+        asm.emitConstantPoolClass(asm.cpi());
+        byteIdx = asm.cpi();
+        asm.emitConstantPoolUTF8("(B)Ljava/lang/Byte;");
+        asm.emitConstantPoolNameAndType(valueOfIdx, asm.cpi());
+        asm.emitConstantPoolMethodref(sub(asm.cpi(), S2), asm.cpi());
+        byteBoxIdx = asm.cpi();
+        asm.emitConstantPoolUTF8("byteValue");
+        asm.emitConstantPoolUTF8("()B");
+        asm.emitConstantPoolNameAndType(sub(asm.cpi(), S1), asm.cpi());
+        asm.emitConstantPoolMethodref(sub(asm.cpi(), S6), asm.cpi());
+        byteUnboxIdx = asm.cpi();
+
+        // Character
+        asm.emitConstantPoolUTF8("java/lang/Character");
+        asm.emitConstantPoolClass(asm.cpi());
+        characterIdx = asm.cpi();
+        asm.emitConstantPoolUTF8("(C)Ljava/lang/Character;");
+        asm.emitConstantPoolNameAndType(valueOfIdx, asm.cpi());
+        asm.emitConstantPoolMethodref(sub(asm.cpi(), S2), asm.cpi());
+        characterBoxIdx = asm.cpi();
+        asm.emitConstantPoolUTF8("charValue");
+        asm.emitConstantPoolUTF8("()C");
+        asm.emitConstantPoolNameAndType(sub(asm.cpi(), S1), asm.cpi());
+        asm.emitConstantPoolMethodref(sub(asm.cpi(), S6), asm.cpi());
+        characterUnboxIdx = asm.cpi();
+
+        // Double
+        asm.emitConstantPoolUTF8("java/lang/Double");
+        asm.emitConstantPoolClass(asm.cpi());
+        doubleIdx = asm.cpi();
+        asm.emitConstantPoolUTF8("(D)Ljava/lang/Double;");
+        asm.emitConstantPoolNameAndType(valueOfIdx, asm.cpi());
+        asm.emitConstantPoolMethodref(sub(asm.cpi(), S2), asm.cpi());
+        doubleBoxIdx = asm.cpi();
+        asm.emitConstantPoolUTF8("doubleValue");
+        asm.emitConstantPoolUTF8("()D");
+        asm.emitConstantPoolNameAndType(sub(asm.cpi(), S1), asm.cpi());
+        asm.emitConstantPoolMethodref(sub(asm.cpi(), S6), asm.cpi());
+        doubleUnboxIdx = asm.cpi();
+
+        // Float
+        asm.emitConstantPoolUTF8("java/lang/Float");
+        asm.emitConstantPoolClass(asm.cpi());
+        floatIdx = asm.cpi();
+        asm.emitConstantPoolUTF8("(F)Ljava/lang/Float;");
+        asm.emitConstantPoolNameAndType(valueOfIdx, asm.cpi());
+        asm.emitConstantPoolMethodref(sub(asm.cpi(), S2), asm.cpi());
+        floatBoxIdx = asm.cpi();
+        asm.emitConstantPoolUTF8("floatValue");
+        asm.emitConstantPoolUTF8("()F");
+        asm.emitConstantPoolNameAndType(sub(asm.cpi(), S1), asm.cpi());
+        asm.emitConstantPoolMethodref(sub(asm.cpi(), S6), asm.cpi());
+        floatUnboxIdx = asm.cpi();
+
+        // Integer
+        asm.emitConstantPoolUTF8("java/lang/Integer");
+        asm.emitConstantPoolClass(asm.cpi());
+        integerIdx = asm.cpi();
+        asm.emitConstantPoolUTF8("(I)Ljava/lang/Integer;");
+        asm.emitConstantPoolNameAndType(valueOfIdx, asm.cpi());
+        asm.emitConstantPoolMethodref(sub(asm.cpi(), S2), asm.cpi());
+        integerBoxIdx = asm.cpi();
+        asm.emitConstantPoolUTF8("intValue");
+        asm.emitConstantPoolUTF8("()I");
+        asm.emitConstantPoolNameAndType(sub(asm.cpi(), S1), asm.cpi());
+        asm.emitConstantPoolMethodref(sub(asm.cpi(), S6), asm.cpi());
+        integerUnboxIdx = asm.cpi();
+
+        // Long
+        asm.emitConstantPoolUTF8("java/lang/Long");
+        asm.emitConstantPoolClass(asm.cpi());
+        longIdx = asm.cpi();
+        asm.emitConstantPoolUTF8("(J)Ljava/lang/Long;");
+        asm.emitConstantPoolNameAndType(valueOfIdx, asm.cpi());
+        asm.emitConstantPoolMethodref(sub(asm.cpi(), S2), asm.cpi());
+        longBoxIdx = asm.cpi();
+        asm.emitConstantPoolUTF8("longValue");
+        asm.emitConstantPoolUTF8("()J");
+        asm.emitConstantPoolNameAndType(sub(asm.cpi(), S1), asm.cpi());
+        asm.emitConstantPoolMethodref(sub(asm.cpi(), S6), asm.cpi());
+        longUnboxIdx = asm.cpi();
+
+        // Short
+        asm.emitConstantPoolUTF8("java/lang/Short");
+        asm.emitConstantPoolClass(asm.cpi());
+        shortIdx = asm.cpi();
+        asm.emitConstantPoolUTF8("(S)Ljava/lang/Short;");
+        asm.emitConstantPoolNameAndType(valueOfIdx, asm.cpi());
+        asm.emitConstantPoolMethodref(sub(asm.cpi(), S2), asm.cpi());
+        shortBoxIdx = asm.cpi();
+        asm.emitConstantPoolUTF8("shortValue");
+        asm.emitConstantPoolUTF8("()S");
+        asm.emitConstantPoolNameAndType(sub(asm.cpi(), S1), asm.cpi());
+        asm.emitConstantPoolMethodref(sub(asm.cpi(), S6), asm.cpi());
+        shortUnboxIdx = asm.cpi();
+    }
+
+    // Necessary because of Java's annoying promotion rules
+    protected static short add(short s1, short s2) {
+        return (short) (s1 + s2);
+    }
+
+    protected static short sub(short s1, short s2) {
+        return (short) (s1 - s2);
+    }
+
+    protected boolean isStatic() {
+        return Modifier.isStatic(modifiers);
+    }
+
+    protected boolean isPrivate() {
+        return Modifier.isPrivate(modifiers);
+    }
+
+    /** Returns class name in "internal" form (i.e., '/' separators
+        instead of '.') */
+    protected static String getClassName
+        (Class<?> c, boolean addPrefixAndSuffixForNonPrimitiveTypes)
+    {
+        if (c.isPrimitive()) {
+            if (c == Boolean.TYPE) {
+                return "Z";
+            } else if (c == Byte.TYPE) {
+                return "B";
+            } else if (c == Character.TYPE) {
+                return "C";
+            } else if (c == Double.TYPE) {
+                return "D";
+            } else if (c == Float.TYPE) {
+                return "F";
+            } else if (c == Integer.TYPE) {
+                return "I";
+            } else if (c == Long.TYPE) {
+                return "J";
+            } else if (c == Short.TYPE) {
+                return "S";
+            } else if (c == Void.TYPE) {
+                return "V";
+            }
+            throw new InternalError("Should have found primitive type");
+        } else if (c.isArray()) {
+            return "[" + getClassName(c.getComponentType(), true);
+        } else {
+            if (addPrefixAndSuffixForNonPrimitiveTypes) {
+                return internalize("L" + c.getName() + ";");
+            } else {
+                return internalize(c.getName());
+            }
+        }
+    }
+
+    private static String internalize(String className) {
+        return className.replace('.', '/');
+    }
+
+    protected void emitConstructor() {
+        // Generate code into fresh code buffer
+        ClassFileAssembler cb = new ClassFileAssembler();
+        // 0 incoming arguments
+        cb.setMaxLocals(1);
+        cb.opc_aload_0();
+        cb.opc_invokespecial(superCtorIdx, 0, 0);
+        cb.opc_return();
+
+        // Emit method
+        emitMethod(initIdx, cb.getMaxLocals(), cb, null, null);
+    }
+
+    // The descriptor's index in the constant pool must be (1 +
+    // nameIdx). "numArgs" must indicate ALL arguments, including the
+    // implicit "this" argument; double and long arguments each count
+    // as 2 in this count. The code buffer must NOT contain the code
+    // length. The exception table may be null, but if non-null must
+    // NOT contain the exception table's length. The checked exception
+    // indices may be null.
+    protected void emitMethod(short nameIdx,
+                              int numArgs,
+                              ClassFileAssembler code,
+                              ClassFileAssembler exceptionTable,
+                              short[] checkedExceptionIndices)
+    {
+        int codeLen = code.getLength();
+        int excLen  = 0;
+        if (exceptionTable != null) {
+            excLen = exceptionTable.getLength();
+            if ((excLen % 8) != 0) {
+                throw new IllegalArgumentException("Illegal exception table");
+            }
+        }
+        int attrLen = 12 + codeLen + excLen;
+        excLen = excLen / 8; // No-op if no exception table
+
+        asm.emitShort(ACC_PUBLIC);
+        asm.emitShort(nameIdx);
+        asm.emitShort(add(nameIdx, S1));
+        if (checkedExceptionIndices == null) {
+            // Code attribute only
+            asm.emitShort(S1);
+        } else {
+            // Code and Exceptions attributes
+            asm.emitShort(S2);
+        }
+        // Code attribute
+        asm.emitShort(codeIdx);
+        asm.emitInt(attrLen);
+        asm.emitShort(code.getMaxStack());
+        asm.emitShort((short) Math.max(numArgs, code.getMaxLocals()));
+        asm.emitInt(codeLen);
+        asm.append(code);
+        asm.emitShort((short) excLen);
+        if (exceptionTable != null) {
+            asm.append(exceptionTable);
+        }
+        asm.emitShort(S0); // No additional attributes for Code attribute
+        if (checkedExceptionIndices != null) {
+            // Exceptions attribute
+            asm.emitShort(exceptionsIdx);
+            asm.emitInt(2 + 2 * checkedExceptionIndices.length);
+            asm.emitShort((short) checkedExceptionIndices.length);
+            for (int i = 0; i < checkedExceptionIndices.length; i++) {
+                asm.emitShort(checkedExceptionIndices[i]);
+            }
+        }
+    }
+
+    protected short indexForPrimitiveType(Class<?> type) {
+        if (type == Boolean.TYPE) {
+            return booleanIdx;
+        } else if (type == Byte.TYPE) {
+            return byteIdx;
+        } else if (type == Character.TYPE) {
+            return characterIdx;
+        } else if (type == Double.TYPE) {
+            return doubleIdx;
+        } else if (type == Float.TYPE) {
+            return floatIdx;
+        } else if (type == Integer.TYPE) {
+            return integerIdx;
+        } else if (type == Long.TYPE) {
+            return longIdx;
+        } else if (type == Short.TYPE) {
+            return shortIdx;
+        }
+        throw new InternalError("Should have found primitive type");
+    }
+
+    protected short boxingMethodForPrimitiveType(Class<?> type) {
+        if (type == Boolean.TYPE) {
+            return booleanBoxIdx;
+        } else if (type == Byte.TYPE) {
+            return byteBoxIdx;
+        } else if (type == Character.TYPE) {
+            return characterBoxIdx;
+        } else if (type == Double.TYPE) {
+            return doubleBoxIdx;
+        } else if (type == Float.TYPE) {
+            return floatBoxIdx;
+        } else if (type == Integer.TYPE) {
+            return integerBoxIdx;
+        } else if (type == Long.TYPE) {
+            return longBoxIdx;
+        } else if (type == Short.TYPE) {
+            return shortBoxIdx;
+        }
+        throw new InternalError("Should have found primitive type");
+    }
+
+    /** Returns true for widening or identity conversions for primitive
+        types only */
+    protected static boolean canWidenTo(Class<?> type, Class<?> otherType) {
+        if (!type.isPrimitive()) {
+            return false;
+        }
+
+        // Widening conversions (from JVM spec):
+        //  byte to short, int, long, float, or double
+        //  short to int, long, float, or double
+        //  char to int, long, float, or double
+        //  int to long, float, or double
+        //  long to float or double
+        //  float to double
+
+        if (type == Boolean.TYPE) {
+            if (otherType == Boolean.TYPE) {
+                return true;
+            }
+        } else if (type == Byte.TYPE) {
+            if (   otherType == Byte.TYPE
+                   || otherType == Short.TYPE
+                   || otherType == Integer.TYPE
+                   || otherType == Long.TYPE
+                   || otherType == Float.TYPE
+                   || otherType == Double.TYPE) {
+                return true;
+            }
+        } else if (type == Short.TYPE) {
+            if (   otherType == Short.TYPE
+                   || otherType == Integer.TYPE
+                   || otherType == Long.TYPE
+                   || otherType == Float.TYPE
+                   || otherType == Double.TYPE) {
+                return true;
+            }
+        } else if (type == Character.TYPE) {
+            if (   otherType == Character.TYPE
+                   || otherType == Integer.TYPE
+                   || otherType == Long.TYPE
+                   || otherType == Float.TYPE
+                   || otherType == Double.TYPE) {
+                return true;
+            }
+        } else if (type == Integer.TYPE) {
+            if (   otherType == Integer.TYPE
+                   || otherType == Long.TYPE
+                   || otherType == Float.TYPE
+                   || otherType == Double.TYPE) {
+                return true;
+            }
+        } else if (type == Long.TYPE) {
+            if (   otherType == Long.TYPE
+                   || otherType == Float.TYPE
+                   || otherType == Double.TYPE) {
+                return true;
+            }
+        } else if (type == Float.TYPE) {
+            if (   otherType == Float.TYPE
+                   || otherType == Double.TYPE) {
+                return true;
+            }
+        } else if (type == Double.TYPE) {
+            if (otherType == Double.TYPE) {
+                return true;
+            }
+        }
+
+        return false;
+    }
+
+    /** Emits the widening bytecode for the given primitive conversion
+        (or none if the identity conversion). Requires that a primitive
+        conversion exists; i.e., canWidenTo must have already been
+        called and returned true. */
+    protected static void emitWideningBytecodeForPrimitiveConversion
+        (ClassFileAssembler cb,
+         Class<?> fromType,
+         Class<?> toType)
+    {
+        // Note that widening conversions for integral types (i.e., "b2s",
+        // "s2i") are no-ops since values on the Java stack are
+        // sign-extended.
+
+        // Widening conversions (from JVM spec):
+        //  byte to short, int, long, float, or double
+        //  short to int, long, float, or double
+        //  char to int, long, float, or double
+        //  int to long, float, or double
+        //  long to float or double
+        //  float to double
+
+        if (   fromType == Byte.TYPE
+               || fromType == Short.TYPE
+               || fromType == Character.TYPE
+               || fromType == Integer.TYPE) {
+            if (toType == Long.TYPE) {
+                cb.opc_i2l();
+            } else if (toType == Float.TYPE) {
+                cb.opc_i2f();
+            } else if (toType == Double.TYPE) {
+                cb.opc_i2d();
+            }
+        } else if (fromType == Long.TYPE) {
+            if (toType == Float.TYPE) {
+                cb.opc_l2f();
+            } else if (toType == Double.TYPE) {
+                cb.opc_l2d();
+            }
+        } else if (fromType == Float.TYPE) {
+            if (toType == Double.TYPE) {
+                cb.opc_f2d();
+            }
+        }
+
+        // Otherwise, was identity or no-op conversion. Fall through.
+    }
+
+    protected short unboxingMethodForPrimitiveType(Class<?> primType) {
+        if (primType == Boolean.TYPE) {
+            return booleanUnboxIdx;
+        } else if (primType == Byte.TYPE) {
+            return byteUnboxIdx;
+        } else if (primType == Character.TYPE) {
+            return characterUnboxIdx;
+        } else if (primType == Short.TYPE) {
+            return shortUnboxIdx;
+        } else if (primType == Integer.TYPE) {
+            return integerUnboxIdx;
+        } else if (primType == Long.TYPE) {
+            return longUnboxIdx;
+        } else if (primType == Float.TYPE) {
+            return floatUnboxIdx;
+        } else if (primType == Double.TYPE) {
+            return doubleUnboxIdx;
+        }
+        throw new InternalError("Illegal primitive type " + primType.getName());
+    }
+
+    protected static final Class<?>[] primitiveTypes = new Class<?>[] {
+        Boolean.TYPE,
+        Byte.TYPE,
+        Character.TYPE,
+        Short.TYPE,
+        Integer.TYPE,
+        Long.TYPE,
+        Float.TYPE,
+        Double.TYPE
+    };
+
+    /** We don't consider "Void" to be a primitive type */
+    protected static boolean isPrimitive(Class<?> c) {
+        return (c.isPrimitive() && c != Void.TYPE);
+    }
+
+    protected int typeSizeInStackSlots(Class<?> c) {
+        if (c == Void.TYPE) {
+            return 0;
+        }
+        if (c == Long.TYPE || c == Double.TYPE) {
+            return 2;
+        }
+        return 1;
+    }
+
+    private ClassFileAssembler illegalArgumentCodeBuffer;
+    protected ClassFileAssembler illegalArgumentCodeBuffer() {
+        if (illegalArgumentCodeBuffer == null) {
+            illegalArgumentCodeBuffer = new ClassFileAssembler();
+            illegalArgumentCodeBuffer.opc_new(illegalArgumentClass);
+            illegalArgumentCodeBuffer.opc_dup();
+            illegalArgumentCodeBuffer.opc_invokespecial(illegalArgumentCtorIdx, 0, 0);
+            illegalArgumentCodeBuffer.opc_athrow();
+        }
+
+        return illegalArgumentCodeBuffer;
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/reflect/AccessorUtils.class b/tests/test_data/std/jdk/internal/reflect/AccessorUtils.class
new file mode 100644
index 0000000000000000000000000000000000000000..dde343c403edc53b80fa3f9726ae34097de8a756
GIT binary patch
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diff --git a/tests/test_data/std/jdk/internal/reflect/AccessorUtils.java b/tests/test_data/std/jdk/internal/reflect/AccessorUtils.java
new file mode 100644
index 00000000..64b928e0
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/reflect/AccessorUtils.java
@@ -0,0 +1,109 @@
+/*
+ * Copyright (c) 2021, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package jdk.internal.reflect;
+
+import java.lang.invoke.WrongMethodTypeException;
+import java.util.Set;
+
+/**
+ * Utility methods used by DirectMethodHandleAccessor and DirectConstructorHandleAccessor
+ */
+public class AccessorUtils {
+    /**
+     * Determines if the given exception thrown by MethodHandle::invokeExact
+     * is caused by an illegal argument passed to Method::invoke or
+     * Constructor::newInstance.  This method inspects the stack trace of
+     * the exception to detect if it is thrown by the method handle core
+     * implementation or the implementation of the reflected method or constructor.
+     *
+     * MethodHandle::invoke throws ClassCastException if the receiver object
+     * is not an instance of the declaring class of the method if the method
+     * is an instance method, or if a parameter value cannot be converted
+     * to the corresponding formal parameter type.  It throws
+     * NullPointerException if the receiver object is null if the method
+     * is an instance method, or if unboxing operation of a parameter fails
+     * because the parameter value is null.  It throws WrongMethodTypeException
+     * if the method type mismatches.
+     *
+     * @param accessorType the accessor class that does the method handle invocation
+     * @param e ClassCastException, NullPointerException or WrongMethodTypeException
+     */
+    static boolean isIllegalArgument(Class<?> accessorType, RuntimeException e) {
+        assert(e instanceof ClassCastException || e instanceof NullPointerException ||
+               e instanceof WrongMethodTypeException);
+
+        StackTraceElement[] stackTrace = e.getStackTrace();
+        if (stackTrace.length == 0) {
+            return false;       // would this happen?
+        }
+
+        int i = 0;
+        StackTraceElement frame = stackTrace[0];
+        // Class::cast and Objects::requiresNonNull may be thrown by the implementation
+        // of the reflected method/constructor.  Skip them and continue.
+        if ((frame.getClassName().equals("java.lang.Class") && frame.getMethodName().equals("cast"))
+                || (frame.getClassName().equals("java.util.Objects") && frame.getMethodName().equals("requiresNonNull"))) {
+            i++;
+        }
+        for (; i < stackTrace.length; i++) {
+            frame = stackTrace[i];
+            String cname = frame.getClassName();
+            // it's illegal argument if this exception is thrown from accessorType
+            if (cname.equals(accessorType.getName())) {
+                return true;
+            }
+            // if this exception is thrown from an unnamed module or not from java.base
+            // then i.e. not from method handle core implementation
+            if (frame.getModuleName() == null || !frame.getModuleName().equals("java.base")) {
+                return false;
+            }
+            int index = cname.lastIndexOf(".");
+            String pn = index > 0 ? cname.substring(0, index) : "";
+            // exception thrown from java.base but not from core reflection/method handle internals
+            if (!IMPL_PACKAGES.contains(pn)) {
+                return false;
+            }
+            // If Constructor::newInstance is invoked by Method::invoke or vice versa,
+            // so the exception is thrown from the implementation body of the reflected
+            // method or constructor
+            if ((accessorType == DirectMethodHandleAccessor.class
+                    && cname.startsWith(DirectConstructorHandleAccessor.class.getName()))
+                || (accessorType == DirectConstructorHandleAccessor.class
+                        && cname.startsWith(DirectMethodHandleAccessor.class.getName()))) {
+                // thrown from another reflection accessor impl class
+                return false;
+            }
+        }
+        return false;
+    }
+
+    private static final Set<String> IMPL_PACKAGES = Set.of(
+            "java.lang.reflect",
+            "java.lang.invoke",
+            "jdk.internal.reflect",
+            "sun.invoke.util"
+    );
+}
diff --git a/tests/test_data/std/jdk/internal/reflect/ByteVector.class b/tests/test_data/std/jdk/internal/reflect/ByteVector.class
new file mode 100644
index 0000000000000000000000000000000000000000..8dc49f1586ebd959fa61b19b43c097e2b77fc718
GIT binary patch
literal 258
zcmYL@J#NB46ohAuf51sFkOR=#4SNSCiexDg1riO_f;Yy-*l4wml&hu40dlA)<85f(
zyqVD_&F|m$4}cduNALvJO?i=ZXSL~6D~<kW^~uWo%j!L!-bC;P7LEE;vQ=Frx5tLL
zz^u~tU3Zl|3ry0i;AJA<r$v_2+y<H;E%Iznr^<4yobj!xuMT1p5qectjcs-y81MSQ
vob+4WYJudwV>3<&0fJl)gq#(C0X4$Z=?t;c2Ru4`!rW<s1qp#AuZPt?Oy4ot

literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/reflect/ByteVector.java b/tests/test_data/std/jdk/internal/reflect/ByteVector.java
new file mode 100644
index 00000000..2a07b072
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/reflect/ByteVector.java
@@ -0,0 +1,37 @@
+/*
+ * Copyright (c) 2001, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package jdk.internal.reflect;
+
+/** A growable array of bytes. */
+
+interface ByteVector {
+    public int  getLength();
+    public byte get(int index);
+    public void put(int index, byte value);
+    public void add(byte value);
+    public void trim();
+    public byte[] getData();
+}
diff --git a/tests/test_data/std/jdk/internal/reflect/ByteVectorFactory.class b/tests/test_data/std/jdk/internal/reflect/ByteVectorFactory.class
new file mode 100644
index 0000000000000000000000000000000000000000..54dead4714d39051445abd7068e13a9add7b46f7
GIT binary patch
literal 587
zcma)3!A`<J5PeILLPbSXR5XT&F~x&Dc+_~1goK3XK||tkDXT7))-1&Yze-Oen)m^J
zlyL@{$PG5>boT9gZ+3Qmem}nf)UoFv1<OV{k0oRT3O)HMy+DSK-c6^c{8%7!p+g;C
z3RrHfZ6hmC?RB3$9mdLpGVqLg2#DxijbhcNBr?tZOW?qU#bKG9^8#tN$?{c!<2mw%
zWRnp|>QPq-thIEgu7~}OGIz2Q5K?SKz6{#ZXx=AaI)2gv0k^f7{W*2!8zp1%tGcy$
zDxx1z2Mf?rgEs-u6mV{%q48Bi^OZ~g&y)0b%1@07R%imeEc$2$poS^)=r0&K8AE(f
zl0tzZ9|QYXr<k7-P{ao9ve?8HAuO&Wmf0`Z_haPV38UFkoazrI>{7x$qtfh}V|IBA
Vhv~EB4rj{cu#KIG-R^`{{sYTye?kBN

literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/reflect/ByteVectorFactory.java b/tests/test_data/std/jdk/internal/reflect/ByteVectorFactory.java
new file mode 100644
index 00000000..3557bd5c
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/reflect/ByteVectorFactory.java
@@ -0,0 +1,36 @@
+/*
+ * Copyright (c) 2001, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package jdk.internal.reflect;
+
+class ByteVectorFactory {
+    static ByteVector create() {
+        return new ByteVectorImpl();
+    }
+
+    static ByteVector create(int sz) {
+        return new ByteVectorImpl(sz);
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/reflect/ByteVectorImpl.class b/tests/test_data/std/jdk/internal/reflect/ByteVectorImpl.class
new file mode 100644
index 0000000000000000000000000000000000000000..77ec5fda5625555343a4811c6c25633202398a6f
GIT binary patch
literal 1550
zcmah}ZBr9x6g^L}NgymGLV-4GE4~295=pHsIKtRzY|%JD2f;WkUs#eYEQU>HS!m%8
z^k;NB{ptsuk=p4v`2qf@PS1UIjlt3J%k!3d&pG$pyLtWJzg+;gaU+Wak{K8#Qb;RY
z-fKQ7dw%E!zSAlP?k_F35tb{*p<Cyn9aQ%_Ers;5=X>ET1*1?c*0UJEU<O%%7*fdX
zIY&;p<@h`02itqhQb-nx^+6I1oA?AHOlvx!qmbCF$m=;1qZngUr+uKHsv>FJ#DwTc
z2kwD);%4y~KF=U;!ovA86zj(ap}Vgz=mddt+-P@>73@OoT@6ds_dHR1245;%_(;(d
ze7oIr6-H{F@7_P$-*$ryXS>Ch(OSFVwCYaa$vu8F!d;J*OxHewD`qayhJzF8-*Lm5
z>+giS+O8^BzC;dJ6jGkwbbnJAUJsqdlU1h^Qzbix3`!NMm13Ryk<&V)D#eVX(`-t*
z{=o<Xk0xb&_tzh^^%;UkC!<i@WO!!Z^VjLLLUz4<7&P1!PwE>x+xmI&6;o``02IF9
zo{)}mloHZI?t^^i7;wG7+qZmI+%tBr`4Z~64xHjDJq9i!jZ0hsGYaGFGH(Krjv>|<
zDY575mxQri4V=QX6Q{_%1sjFIfGb?5$vlG`W;N(Ulo*2&f-z%+WosA}DZIv*NZ||Q
zjIE~xO0Ym^e!zaOx>*$B^ai6vUEZ=^!0i5sVcYr}pV}4$%8PYf5R)1)k~vR{$~5gO
zO8L4^X1*sgkD``o>r5qz=TM3X1A-;_gY_Z8^BZDJ#5h48fdw)ylJN#nZz7K+%{mpq
z^jNK!mC(3~c~;fOU#8s1uQt=9;2HZTZP?Fop)7sKX2m(Fo`uWN>XQ-`e~S{nBf<CV
zK&7wvnVyUpP0nvv7ojZDUh9q13A-ZXR|Q>Ix<>O4T$G!!^=hCdPszDtbpHpF_8f=h
zT|0iH6)Tv;9Ztzz`g*UYV-n+R$p|S)5i5#yi2c{`O>9D$y9A|#@EH&NBeSaUqJd7u
zC<*yDi<5t6Q>23>OQ&~t|H4pwTIP7K>LN-~gxQrEN@r@w69-tMB@gN42J3jlS*~+J
Z9{07i)bq2%Z%`)aO>Jk|x}c>m{twO{=}G_q

literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/reflect/ByteVectorImpl.java b/tests/test_data/std/jdk/internal/reflect/ByteVectorImpl.java
new file mode 100644
index 00000000..b0f9d81f
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/reflect/ByteVectorImpl.java
@@ -0,0 +1,88 @@
+/*
+ * Copyright (c) 2001, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package jdk.internal.reflect;
+
+class ByteVectorImpl implements ByteVector {
+    private byte[] data;
+    private int pos;
+
+    public ByteVectorImpl() {
+        this(100);
+    }
+
+    public ByteVectorImpl(int sz) {
+        data = new byte[sz];
+        pos = -1;
+    }
+
+    public int getLength() {
+        return pos + 1;
+    }
+
+    public byte get(int index) {
+        if (index >= data.length) {
+            resize(index);
+            pos = index;
+        }
+        return data[index];
+    }
+
+    public void put(int index, byte value) {
+        if (index >= data.length) {
+            resize(index);
+            pos = index;
+        }
+        data[index] = value;
+    }
+
+    public void add(byte value) {
+        if (++pos >= data.length) {
+            resize(pos);
+        }
+        data[pos] = value;
+    }
+
+    public void trim() {
+        if (pos != data.length - 1) {
+            byte[] newData = new byte[pos + 1];
+            System.arraycopy(data, 0, newData, 0, pos + 1);
+            data = newData;
+        }
+    }
+
+    public byte[] getData() {
+        return data;
+    }
+
+    private void resize(int minSize) {
+        if (minSize <= 2 * data.length) {
+            minSize = 2 * data.length;
+        }
+        byte[] newData = new byte[minSize];
+        System.arraycopy(data, 0, newData, 0, data.length);
+        data = newData;
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/reflect/CallerSensitive.class b/tests/test_data/std/jdk/internal/reflect/CallerSensitive.class
new file mode 100644
index 0000000000000000000000000000000000000000..39b19afff2a15b912fd27658a7fff06cbf279207
GIT binary patch
literal 404
zcmaiw%}T>S5Xb*hZKL(8f)^1{M0#`|z?0O7g0+%HFP^q>EE~5Q*=z!RH4i?34<$}L
zSdf5+`TqZAU_QUzKL8A{8=*xw&7WVDae=+lR(XE0oCP(|*0LY7D@`ypM_48Fa$Rd>
zwVSHZBo|eL4&i9o)y@?`2U9q8@tYF5<D&8zUm44Uy+51J7C2!)sa!BKel(?-SYF~K
z;rO=kM8biEDcm`sU29v(_WnQ8`@))RE<lt#+@&|em~hyPq}oq8i1MU)9$TKt`E>rq
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/reflect/CallerSensitive.java b/tests/test_data/std/jdk/internal/reflect/CallerSensitive.java
new file mode 100644
index 00000000..73853198
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/reflect/CallerSensitive.java
@@ -0,0 +1,41 @@
+/*
+ * Copyright (c) 2013, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package jdk.internal.reflect;
+
+import java.lang.annotation.*;
+import static java.lang.annotation.ElementType.*;
+
+/**
+ * A method annotated @CallerSensitive is sensitive to its calling class,
+ * via {@link jdk.internal.reflect.Reflection#getCallerClass Reflection.getCallerClass},
+ * or via some equivalent.
+ *
+ * @author John R. Rose
+ */
+@Retention(RetentionPolicy.RUNTIME)
+@Target({METHOD})
+public @interface CallerSensitive {
+}
diff --git a/tests/test_data/std/jdk/internal/reflect/CallerSensitiveAdapter.class b/tests/test_data/std/jdk/internal/reflect/CallerSensitiveAdapter.class
new file mode 100644
index 0000000000000000000000000000000000000000..18e400be9914b05c00d72570229649542decb18f
GIT binary patch
literal 416
zcmaiwJx;?w5QX0a5<~b4C5jM;A`KFI04mD~q6i9#EgGtgGem1P>&RYP%GD@10Ea@1
zDM(|9VrSp%d~cq#U*8{}03w_R=n!tR<-0P@bK$gA1;1HNy^6H8T*T~3<4w)sQg4I^
zuum9dy4K2Sw^Fl3CUAfr;cEA)oy)!UCU+|QlZ1YpS4GMX#xh~p9&p!eAzaKW=gpd5
zOlcODcUwxr^|Uo<&Ys1SyL&>n*0z$6(Ld;OZcVyv4AC@<W5Q*-A<@N(y>K_}^NHoP
wgeTh#3)Fj>B#*Q4h(Oqr)0NK#ItYI20S@IJO5c~+5#tyqIBn!Bh;fF&54V<k00000

literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/reflect/CallerSensitiveAdapter.java b/tests/test_data/std/jdk/internal/reflect/CallerSensitiveAdapter.java
new file mode 100644
index 00000000..2d7fced0
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/reflect/CallerSensitiveAdapter.java
@@ -0,0 +1,112 @@
+/*
+ * Copyright (c) 2021, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package jdk.internal.reflect;
+
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+import java.lang.annotation.Target;
+
+import static java.lang.annotation.ElementType.METHOD;
+
+/**
+ * A method annotated @CallerSensitiveAdapter is an adapter method corresponding
+ * to a caller-sensitive method, which is annotated with @CallerSensitive.
+ *
+ * A caller-sensitive adapter is private and has the same name as its
+ * corresponding caller-sensitive method with a trailing caller class parameter.
+ *
+ * When a caller-sensitive method is invoked via Method::invoke or MethodHandle
+ * the core reflection and method handle implementation will find if
+ * an @CallerSensitiveAdapter method for that CSM is present. If present,
+ * the runtime will invoke the adapter method with the caller class
+ * argument instead. This special calling sequence ensures that the same caller
+ * class is passed to a caller-sensitive method via Method::invoke,
+ * MethodHandle::invokeExact, or a mix of these methods.
+ *
+ * For example, CSM::returnCallerClass is a caller-sensitive method
+ * with an adapter method:
+ * {@code
+ * class CSM {
+ *     @CallerSensitive
+ *     static Class<?> returnCallerClass() {
+ *         return returnCallerClass(Reflection.getCallerClass());
+ *     }
+ *     @CallerSensitiveAdapter
+ *     private static Class<?> returnCallerClass(Class<?> caller) {
+ *         return caller;
+ *     }
+ * }
+ *
+ * class Test {
+ *     void test() throws Throwable {
+ *         // calling CSM::returnCallerClass via reflection
+ *         var csm = CSM.class.getMethod("returnCallerClass");
+ *         // expect Foo to be the caller class
+ *         var caller = csm.invoke(null);
+ *         assert(caller == Test.class);
+ *     }
+ *     void test2() throws Throwable {
+ *         // method handle for Method::invoke
+ *         MethodHandle mh = MethodHandles.lookup().findVirtual(Method.class, "invoke",
+ *                                  methodType(Object.class, Object.class, Object[].class));
+ *         var csm = CSM.class.getMethod("returnCallerClass");
+ *         // invoke Method::invoke via method handle and the target method
+ *         // being invoked reflectively is CSM::returnCallerClass
+ *         var caller = mh.invoke(csm, null, null);
+ *         assert(caller == Test.class);
+ *     }
+ * }
+ * }
+ *
+ *
+ * Both CSM::returnCallerClass and Method::invoke can have an adapter method
+ * with a caller-class parameter defined. Test::test calls CSM::returnCallerClass
+ * via Method::invoke which does the stack walking to find the caller's class.
+ * It will pass the caller's class directly to the adapter method for
+ * CSM::returnCallerClass.
+ *
+ * Similarly, Test::test2 invokes the method handle of Method::invoke to
+ * call CSM::returnCallerClass reflectively.  In that case, MethodHandle::invokeExact
+ * uses the lookup class of the Lookup object producing the method handle
+ * as the caller's class, so no stack walking involved. The lookup class is Test.
+ * It will invoke the adapter method of Method::invoke with Test as the caller's
+ * class, which in turn invokes the adapter method of CSM::returnCallerClass
+ * with Test as the caller. The calling sequence eliminates the need for
+ * multiple stack walks when a caller-sensitive method is invoked reflectively.
+ *
+ * For caller-sensitive methods that require an exact caller class, the adapter
+ * method must be defined for correctness. {@link java.lang.invoke.MethodHandles#lookup()}
+ * and {@link ClassLoader#registerAsParallelCapable()} are the only two methods
+ * in the JDK that need the exact caller class.
+ *
+ * On the other hand, for caller-sensitive methods that use the caller's class
+ * for access checks or security permission checks, i.e., based on its runtime
+ * package, defining loader, or protection domain, the adapter method is optional.
+ */
+@Retention(RetentionPolicy.CLASS)
+@Target({METHOD})
+public @interface CallerSensitiveAdapter {
+}
diff --git a/tests/test_data/std/jdk/internal/reflect/ClassDefiner$1.class b/tests/test_data/std/jdk/internal/reflect/ClassDefiner$1.class
new file mode 100644
index 0000000000000000000000000000000000000000..063c5acb75d6adc90a1bde91114a0ba3679ed96e
GIT binary patch
literal 1010
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/reflect/ClassDefiner.class b/tests/test_data/std/jdk/internal/reflect/ClassDefiner.class
new file mode 100644
index 0000000000000000000000000000000000000000..0087b80ecef8a5616c119ae5f1cdfda662b627d1
GIT binary patch
literal 1426
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/reflect/ClassDefiner.java b/tests/test_data/std/jdk/internal/reflect/ClassDefiner.java
new file mode 100644
index 00000000..185f61b9
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/reflect/ClassDefiner.java
@@ -0,0 +1,80 @@
+/*
+ * Copyright (c) 2001, 2023, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package jdk.internal.reflect;
+
+import java.security.AccessController;
+import java.security.PrivilegedAction;
+
+import jdk.internal.access.JavaLangAccess;
+import jdk.internal.access.SharedSecrets;
+
+/** Utility class which assists in calling defineClass() by
+ *  creating a new class loader which delegates to the one needed in
+ *  order for proper resolution of the given bytecodes to occur.
+ *
+ *  This is only used to define SerializationConstructorAccessor.
+ */
+
+class ClassDefiner {
+    static final JavaLangAccess JLA = SharedSecrets.getJavaLangAccess();
+
+    /** <P> We define generated code into a new class loader which
+      delegates to the defining loader of the target class. It is
+      necessary for the VM to be able to resolve references to the
+      target class from the generated bytecodes, which could not occur
+      if the generated code was loaded into the bootstrap class
+      loader. </P>
+
+      <P> There are two primary reasons for creating a new loader
+      instead of defining these bytecodes directly into the defining
+      loader of the target class: first, it avoids any possible
+      security risk of having these bytecodes in the same loader.
+      Second, it allows the generated bytecodes to be unloaded earlier
+      than would otherwise be possible, decreasing run-time
+      footprint. </P>
+    */
+    static Class<?> defineClass(String name, byte[] bytes, int off, int len,
+                                final ClassLoader parentClassLoader)
+    {
+        @SuppressWarnings("removal")
+        ClassLoader newLoader = AccessController.doPrivileged(
+            new PrivilegedAction<ClassLoader>() {
+                public ClassLoader run() {
+                        return new DelegatingClassLoader(parentClassLoader);
+                    }
+                });
+        return JLA.defineClass(newLoader, name, bytes, null, "__ClassDefiner__");
+    }
+}
+
+
+// NOTE: this class's name and presence are known to the virtual
+// machine as of the fix for 4474172.
+class DelegatingClassLoader extends ClassLoader {
+    DelegatingClassLoader(ClassLoader parent) {
+        super(parent);
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/reflect/ClassFileAssembler.class b/tests/test_data/std/jdk/internal/reflect/ClassFileAssembler.class
new file mode 100644
index 0000000000000000000000000000000000000000..ddb0fc5aea14ea94fd43bc542bf7fb0dcde2128c
GIT binary patch
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/reflect/ClassFileAssembler.java b/tests/test_data/std/jdk/internal/reflect/ClassFileAssembler.java
new file mode 100644
index 00000000..31ddb675
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/reflect/ClassFileAssembler.java
@@ -0,0 +1,671 @@
+/*
+ * Copyright (c) 2001, 2004, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package jdk.internal.reflect;
+
+import sun.nio.cs.UTF_8;
+
+class ClassFileAssembler implements ClassFileConstants {
+    private ByteVector vec;
+    private short cpIdx = 0;
+
+    public ClassFileAssembler() {
+        this(ByteVectorFactory.create());
+    }
+
+    public ClassFileAssembler(ByteVector vec) {
+        this.vec = vec;
+    }
+
+    public ByteVector getData() {
+        return vec;
+    }
+
+    /** Length in bytes */
+    public short getLength() {
+        return (short) vec.getLength();
+    }
+
+    public void emitMagicAndVersion() {
+        emitInt(0xCAFEBABE);
+        emitShort((short) 0);
+        emitShort((short) 49);
+    }
+
+    public void emitInt(int val) {
+        emitByte((byte) (val >> 24));
+        emitByte((byte) ((val >> 16) & 0xFF));
+        emitByte((byte) ((val >> 8) & 0xFF));
+        emitByte((byte) (val & 0xFF));
+    }
+
+    public void emitShort(short val) {
+        emitByte((byte) ((val >> 8) & 0xFF));
+        emitByte((byte) (val & 0xFF));
+    }
+
+    // Support for labels; package-private
+    void emitShort(short bci, short val) {
+        vec.put(bci,     (byte) ((val >> 8) & 0xFF));
+        vec.put(bci + 1, (byte) (val & 0xFF));
+    }
+
+    public void emitByte(byte val) {
+        vec.add(val);
+    }
+
+    public void append(ClassFileAssembler asm) {
+        append(asm.vec);
+    }
+
+    public void append(ByteVector vec) {
+        for (int i = 0; i < vec.getLength(); i++) {
+            emitByte(vec.get(i));
+        }
+    }
+
+    /** Keeps track of the current (one-based) constant pool index;
+        incremented after emitting one of the following constant pool
+        entries. Can fetch the current constant pool index for use in
+        later entries.  Index points at the last valid constant pool
+        entry; initially invalid. It is illegal to fetch the constant
+        pool index before emitting at least one constant pool entry. */
+    public short cpi() {
+        if (cpIdx == 0) {
+            throw new RuntimeException("Illegal use of ClassFileAssembler");
+        }
+        return cpIdx;
+    }
+
+    public void emitConstantPoolUTF8(String str) {
+        byte[] bytes = str.getBytes(UTF_8.INSTANCE);
+        emitByte(CONSTANT_Utf8);
+        emitShort((short) bytes.length);
+        for (int i = 0; i < bytes.length; i++) {
+            emitByte(bytes[i]);
+        }
+        cpIdx++;
+    }
+
+    public void emitConstantPoolClass(short index) {
+        emitByte(CONSTANT_Class);
+        emitShort(index);
+        cpIdx++;
+    }
+
+    public void emitConstantPoolNameAndType(short nameIndex, short typeIndex) {
+        emitByte(CONSTANT_NameAndType);
+        emitShort(nameIndex);
+        emitShort(typeIndex);
+        cpIdx++;
+    }
+
+    public void emitConstantPoolFieldref
+        (short classIndex, short nameAndTypeIndex)
+    {
+        emitByte(CONSTANT_Fieldref);
+        emitShort(classIndex);
+        emitShort(nameAndTypeIndex);
+        cpIdx++;
+    }
+
+    public void emitConstantPoolMethodref
+        (short classIndex, short nameAndTypeIndex)
+    {
+        emitByte(CONSTANT_Methodref);
+        emitShort(classIndex);
+        emitShort(nameAndTypeIndex);
+        cpIdx++;
+    }
+
+    public void emitConstantPoolInterfaceMethodref
+        (short classIndex, short nameAndTypeIndex)
+    {
+        emitByte(CONSTANT_InterfaceMethodref);
+        emitShort(classIndex);
+        emitShort(nameAndTypeIndex);
+        cpIdx++;
+    }
+
+    public void emitConstantPoolString(short utf8Index) {
+        emitByte(CONSTANT_String);
+        emitShort(utf8Index);
+        cpIdx++;
+    }
+
+    //----------------------------------------------------------------------
+    // Opcodes. Keeps track of maximum stack and locals. Make a new
+    // assembler for each piece of assembled code, then append the
+    // result to the previous assembler's class file.
+    //
+
+    private int stack     = 0;
+    private int maxStack  = 0;
+    private int maxLocals = 0;
+
+    private void incStack() {
+        setStack(stack + 1);
+    }
+
+    private void decStack() {
+        --stack;
+    }
+
+    public short getMaxStack() {
+        return (short) maxStack;
+    }
+
+    public short getMaxLocals() {
+        return (short) maxLocals;
+    }
+
+    /** It's necessary to be able to specify the number of arguments at
+        the beginning of the method (which translates to the initial
+        value of max locals) */
+    public void setMaxLocals(int maxLocals) {
+        this.maxLocals = maxLocals;
+    }
+
+    /** Needed to do flow control. Returns current stack depth. */
+    public int getStack() {
+        return stack;
+    }
+
+    /** Needed to do flow control. */
+    public void setStack(int value) {
+        stack = value;
+        if (stack > maxStack) {
+            maxStack = stack;
+        }
+    }
+
+    //-----------//
+    // Constants //
+    //-----------//
+
+    public void opc_aconst_null() {
+        emitByte(opc_aconst_null);
+        incStack();
+    }
+
+    public void opc_sipush(short constant) {
+        emitByte(opc_sipush);
+        emitShort(constant);
+        incStack();
+    }
+
+    public void opc_ldc(byte cpIdx) {
+        emitByte(opc_ldc);
+        emitByte(cpIdx);
+        incStack();
+    }
+
+    //---------------------------------//
+    // Local variable loads and stores //
+    //---------------------------------//
+
+    public void opc_iload_0() {
+        emitByte(opc_iload_0);
+        if (maxLocals < 1) maxLocals = 1;
+        incStack();
+    }
+
+    public void opc_iload_1() {
+        emitByte(opc_iload_1);
+        if (maxLocals < 2) maxLocals = 2;
+        incStack();
+    }
+
+    public void opc_iload_2() {
+        emitByte(opc_iload_2);
+        if (maxLocals < 3) maxLocals = 3;
+        incStack();
+    }
+
+    public void opc_iload_3() {
+        emitByte(opc_iload_3);
+        if (maxLocals < 4) maxLocals = 4;
+        incStack();
+    }
+
+    public void opc_lload_0() {
+        emitByte(opc_lload_0);
+        if (maxLocals < 2) maxLocals = 2;
+        incStack();
+        incStack();
+    }
+
+    public void opc_lload_1() {
+        emitByte(opc_lload_1);
+        if (maxLocals < 3) maxLocals = 3;
+        incStack();
+        incStack();
+    }
+
+    public void opc_lload_2() {
+        emitByte(opc_lload_2);
+        if (maxLocals < 4) maxLocals = 4;
+        incStack();
+        incStack();
+    }
+
+    public void opc_lload_3() {
+        emitByte(opc_lload_3);
+        if (maxLocals < 5) maxLocals = 5;
+        incStack();
+        incStack();
+    }
+
+    public void opc_fload_0() {
+        emitByte(opc_fload_0);
+        if (maxLocals < 1) maxLocals = 1;
+        incStack();
+    }
+
+    public void opc_fload_1() {
+        emitByte(opc_fload_1);
+        if (maxLocals < 2) maxLocals = 2;
+        incStack();
+    }
+
+    public void opc_fload_2() {
+        emitByte(opc_fload_2);
+        if (maxLocals < 3) maxLocals = 3;
+        incStack();
+    }
+
+    public void opc_fload_3() {
+        emitByte(opc_fload_3);
+        if (maxLocals < 4) maxLocals = 4;
+        incStack();
+    }
+
+    public void opc_dload_0() {
+        emitByte(opc_dload_0);
+        if (maxLocals < 2) maxLocals = 2;
+        incStack();
+        incStack();
+    }
+
+    public void opc_dload_1() {
+        emitByte(opc_dload_1);
+        if (maxLocals < 3) maxLocals = 3;
+        incStack();
+        incStack();
+    }
+
+    public void opc_dload_2() {
+        emitByte(opc_dload_2);
+        if (maxLocals < 4) maxLocals = 4;
+        incStack();
+        incStack();
+    }
+
+    public void opc_dload_3() {
+        emitByte(opc_dload_3);
+        if (maxLocals < 5) maxLocals = 5;
+        incStack();
+        incStack();
+    }
+
+    public void opc_aload_0() {
+        emitByte(opc_aload_0);
+        if (maxLocals < 1) maxLocals = 1;
+        incStack();
+    }
+
+    public void opc_aload_1() {
+        emitByte(opc_aload_1);
+        if (maxLocals < 2) maxLocals = 2;
+        incStack();
+    }
+
+    public void opc_aload_2() {
+        emitByte(opc_aload_2);
+        if (maxLocals < 3) maxLocals = 3;
+        incStack();
+    }
+
+    public void opc_aload_3() {
+        emitByte(opc_aload_3);
+        if (maxLocals < 4) maxLocals = 4;
+        incStack();
+    }
+
+    public void opc_aaload() {
+        emitByte(opc_aaload);
+        decStack();
+    }
+
+    public void opc_astore_0() {
+        emitByte(opc_astore_0);
+        if (maxLocals < 1) maxLocals = 1;
+        decStack();
+    }
+
+    public void opc_astore_1() {
+        emitByte(opc_astore_1);
+        if (maxLocals < 2) maxLocals = 2;
+        decStack();
+    }
+
+    public void opc_astore_2() {
+        emitByte(opc_astore_2);
+        if (maxLocals < 3) maxLocals = 3;
+        decStack();
+    }
+
+    public void opc_astore_3() {
+        emitByte(opc_astore_3);
+        if (maxLocals < 4) maxLocals = 4;
+        decStack();
+    }
+
+    //--------------------//
+    // Stack manipulation //
+    //--------------------//
+
+    public void opc_pop() {
+        emitByte(opc_pop);
+        decStack();
+    }
+
+    public void opc_dup() {
+        emitByte(opc_dup);
+        incStack();
+    }
+
+    public void opc_dup_x1() {
+        emitByte(opc_dup_x1);
+        incStack();
+    }
+
+    public void opc_swap() {
+        emitByte(opc_swap);
+    }
+
+    //---------------------------//
+    // Widening conversions only //
+    //---------------------------//
+
+    public void opc_i2l() {
+        emitByte(opc_i2l);
+    }
+
+    public void opc_i2f() {
+        emitByte(opc_i2f);
+    }
+
+    public void opc_i2d() {
+        emitByte(opc_i2d);
+    }
+
+    public void opc_l2f() {
+        emitByte(opc_l2f);
+    }
+
+    public void opc_l2d() {
+        emitByte(opc_l2d);
+    }
+
+    public void opc_f2d() {
+        emitByte(opc_f2d);
+    }
+
+    //--------------//
+    // Control flow //
+    //--------------//
+
+    public void opc_ifeq(short bciOffset) {
+        emitByte(opc_ifeq);
+        emitShort(bciOffset);
+        decStack();
+    }
+
+    /** Control flow with forward-reference BCI. Stack assumes
+        straight-through control flow. */
+    public void opc_ifeq(Label l) {
+        short instrBCI = getLength();
+        emitByte(opc_ifeq);
+        l.add(this, instrBCI, getLength(), getStack() - 1);
+        emitShort((short) -1); // Must be patched later
+    }
+
+    public void opc_if_icmpeq(short bciOffset) {
+        emitByte(opc_if_icmpeq);
+        emitShort(bciOffset);
+        setStack(getStack() - 2);
+    }
+
+    /** Control flow with forward-reference BCI. Stack assumes straight
+        control flow. */
+    public void opc_if_icmpeq(Label l) {
+        short instrBCI = getLength();
+        emitByte(opc_if_icmpeq);
+        l.add(this, instrBCI, getLength(), getStack() - 2);
+        emitShort((short) -1); // Must be patched later
+    }
+
+    public void opc_goto(short bciOffset) {
+        emitByte(opc_goto);
+        emitShort(bciOffset);
+    }
+
+    /** Control flow with forward-reference BCI. Stack assumes straight
+        control flow. */
+    public void opc_goto(Label l) {
+        short instrBCI = getLength();
+        emitByte(opc_goto);
+        l.add(this, instrBCI, getLength(), getStack());
+        emitShort((short) -1); // Must be patched later
+    }
+
+    public void opc_ifnull(short bciOffset) {
+        emitByte(opc_ifnull);
+        emitShort(bciOffset);
+        decStack();
+    }
+
+    /** Control flow with forward-reference BCI. Stack assumes straight
+        control flow. */
+    public void opc_ifnull(Label l) {
+        short instrBCI = getLength();
+        emitByte(opc_ifnull);
+        l.add(this, instrBCI, getLength(), getStack() - 1);
+        emitShort((short) -1); // Must be patched later
+        decStack();
+    }
+
+    public void opc_ifnonnull(short bciOffset) {
+        emitByte(opc_ifnonnull);
+        emitShort(bciOffset);
+        decStack();
+    }
+
+    /** Control flow with forward-reference BCI. Stack assumes straight
+        control flow. */
+    public void opc_ifnonnull(Label l) {
+        short instrBCI = getLength();
+        emitByte(opc_ifnonnull);
+        l.add(this, instrBCI, getLength(), getStack() - 1);
+        emitShort((short) -1); // Must be patched later
+        decStack();
+    }
+
+    //---------------------//
+    // Return instructions //
+    //---------------------//
+
+    public void opc_ireturn() {
+        emitByte(opc_ireturn);
+        setStack(0);
+    }
+
+    public void opc_lreturn() {
+        emitByte(opc_lreturn);
+        setStack(0);
+    }
+
+    public void opc_freturn() {
+        emitByte(opc_freturn);
+        setStack(0);
+    }
+
+    public void opc_dreturn() {
+        emitByte(opc_dreturn);
+        setStack(0);
+    }
+
+    public void opc_areturn() {
+        emitByte(opc_areturn);
+        setStack(0);
+    }
+
+    public void opc_return() {
+        emitByte(opc_return);
+        setStack(0);
+    }
+
+    //------------------//
+    // Field operations //
+    //------------------//
+
+    public void opc_getstatic(short fieldIndex, int fieldSizeInStackSlots) {
+        emitByte(opc_getstatic);
+        emitShort(fieldIndex);
+        setStack(getStack() + fieldSizeInStackSlots);
+    }
+
+    public void opc_putstatic(short fieldIndex, int fieldSizeInStackSlots) {
+        emitByte(opc_putstatic);
+        emitShort(fieldIndex);
+        setStack(getStack() - fieldSizeInStackSlots);
+    }
+
+    public void opc_getfield(short fieldIndex, int fieldSizeInStackSlots) {
+        emitByte(opc_getfield);
+        emitShort(fieldIndex);
+        setStack(getStack() + fieldSizeInStackSlots - 1);
+    }
+
+    public void opc_putfield(short fieldIndex, int fieldSizeInStackSlots) {
+        emitByte(opc_putfield);
+        emitShort(fieldIndex);
+        setStack(getStack() - fieldSizeInStackSlots - 1);
+    }
+
+    //--------------------//
+    // Method invocations //
+    //--------------------//
+
+    /** Long and double arguments and return types count as 2 arguments;
+        other values count as 1. */
+    public void opc_invokevirtual(short methodIndex,
+                                  int numArgs,
+                                  int numReturnValues)
+    {
+        emitByte(opc_invokevirtual);
+        emitShort(methodIndex);
+        setStack(getStack() - numArgs - 1 + numReturnValues);
+    }
+
+    /** Long and double arguments and return types count as 2 arguments;
+        other values count as 1. */
+    public void opc_invokespecial(short methodIndex,
+                                  int numArgs,
+                                  int numReturnValues)
+    {
+        emitByte(opc_invokespecial);
+        emitShort(methodIndex);
+        setStack(getStack() - numArgs - 1 + numReturnValues);
+    }
+
+    /** Long and double arguments and return types count as 2 arguments;
+        other values count as 1. */
+    public void opc_invokestatic(short methodIndex,
+                                 int numArgs,
+                                 int numReturnValues)
+    {
+        emitByte(opc_invokestatic);
+        emitShort(methodIndex);
+        setStack(getStack() - numArgs + numReturnValues);
+    }
+
+    /** Long and double arguments and return types count as 2 arguments;
+        other values count as 1. */
+    public void opc_invokeinterface(short methodIndex,
+                                    int numArgs,
+                                    byte count,
+                                    int numReturnValues)
+    {
+        emitByte(opc_invokeinterface);
+        emitShort(methodIndex);
+        emitByte(count);
+        emitByte((byte) 0);
+        setStack(getStack() - numArgs - 1 + numReturnValues);
+    }
+
+    //--------------//
+    // Array length //
+    //--------------//
+
+    public void opc_arraylength() {
+        emitByte(opc_arraylength);
+    }
+
+    //-----//
+    // New //
+    //-----//
+
+    public void opc_new(short classIndex) {
+        emitByte(opc_new);
+        emitShort(classIndex);
+        incStack();
+    }
+
+    //--------//
+    // Athrow //
+    //--------//
+
+    public void opc_athrow() {
+        emitByte(opc_athrow);
+        setStack(1);
+    }
+
+    //--------------------------//
+    // Checkcast and instanceof //
+    //--------------------------//
+
+    /** Assumes the checkcast succeeds */
+    public void opc_checkcast(short classIndex) {
+        emitByte(opc_checkcast);
+        emitShort(classIndex);
+    }
+
+    public void opc_instanceof(short classIndex) {
+        emitByte(opc_instanceof);
+        emitShort(classIndex);
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/reflect/ClassFileConstants.class b/tests/test_data/std/jdk/internal/reflect/ClassFileConstants.class
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diff --git a/tests/test_data/std/jdk/internal/reflect/ClassFileConstants.java b/tests/test_data/std/jdk/internal/reflect/ClassFileConstants.java
new file mode 100644
index 00000000..3562a8d5
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/reflect/ClassFileConstants.java
@@ -0,0 +1,140 @@
+/*
+ * Copyright (c) 2001, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package jdk.internal.reflect;
+
+/** Minimal set of class file constants for assembly of field and
+    method accessors. */
+
+interface ClassFileConstants {
+    // Constants
+    public static final byte opc_aconst_null   = (byte) 0x1;
+    public static final byte opc_sipush        = (byte) 0x11;
+    public static final byte opc_ldc           = (byte) 0x12;
+
+    // Local variable loads and stores
+    public static final byte opc_iload_0       = (byte) 0x1a;
+    public static final byte opc_iload_1       = (byte) 0x1b;
+    public static final byte opc_iload_2       = (byte) 0x1c;
+    public static final byte opc_iload_3       = (byte) 0x1d;
+    public static final byte opc_lload_0       = (byte) 0x1e;
+    public static final byte opc_lload_1       = (byte) 0x1f;
+    public static final byte opc_lload_2       = (byte) 0x20;
+    public static final byte opc_lload_3       = (byte) 0x21;
+    public static final byte opc_fload_0       = (byte) 0x22;
+    public static final byte opc_fload_1       = (byte) 0x23;
+    public static final byte opc_fload_2       = (byte) 0x24;
+    public static final byte opc_fload_3       = (byte) 0x25;
+    public static final byte opc_dload_0       = (byte) 0x26;
+    public static final byte opc_dload_1       = (byte) 0x27;
+    public static final byte opc_dload_2       = (byte) 0x28;
+    public static final byte opc_dload_3       = (byte) 0x29;
+    public static final byte opc_aload_0       = (byte) 0x2a;
+    public static final byte opc_aload_1       = (byte) 0x2b;
+    public static final byte opc_aload_2       = (byte) 0x2c;
+    public static final byte opc_aload_3       = (byte) 0x2d;
+    public static final byte opc_aaload        = (byte) 0x32;
+    public static final byte opc_astore_0      = (byte) 0x4b;
+    public static final byte opc_astore_1      = (byte) 0x4c;
+    public static final byte opc_astore_2      = (byte) 0x4d;
+    public static final byte opc_astore_3      = (byte) 0x4e;
+
+    // Stack manipulation
+    public static final byte opc_pop           = (byte) 0x57;
+    public static final byte opc_dup           = (byte) 0x59;
+    public static final byte opc_dup_x1        = (byte) 0x5a;
+    public static final byte opc_swap          = (byte) 0x5f;
+
+    // Conversions
+    public static final byte opc_i2l           = (byte) 0x85;
+    public static final byte opc_i2f           = (byte) 0x86;
+    public static final byte opc_i2d           = (byte) 0x87;
+    public static final byte opc_l2i           = (byte) 0x88;
+    public static final byte opc_l2f           = (byte) 0x89;
+    public static final byte opc_l2d           = (byte) 0x8a;
+    public static final byte opc_f2i           = (byte) 0x8b;
+    public static final byte opc_f2l           = (byte) 0x8c;
+    public static final byte opc_f2d           = (byte) 0x8d;
+    public static final byte opc_d2i           = (byte) 0x8e;
+    public static final byte opc_d2l           = (byte) 0x8f;
+    public static final byte opc_d2f           = (byte) 0x90;
+    public static final byte opc_i2b           = (byte) 0x91;
+    public static final byte opc_i2c           = (byte) 0x92;
+    public static final byte opc_i2s           = (byte) 0x93;
+
+    // Control flow
+    public static final byte opc_ifeq          = (byte) 0x99;
+    public static final byte opc_if_icmpeq     = (byte) 0x9f;
+    public static final byte opc_goto          = (byte) 0xa7;
+
+    // Return instructions
+    public static final byte opc_ireturn       = (byte) 0xac;
+    public static final byte opc_lreturn       = (byte) 0xad;
+    public static final byte opc_freturn       = (byte) 0xae;
+    public static final byte opc_dreturn       = (byte) 0xaf;
+    public static final byte opc_areturn       = (byte) 0xb0;
+    public static final byte opc_return        = (byte) 0xb1;
+
+    // Field operations
+    public static final byte opc_getstatic     = (byte) 0xb2;
+    public static final byte opc_putstatic     = (byte) 0xb3;
+    public static final byte opc_getfield      = (byte) 0xb4;
+    public static final byte opc_putfield      = (byte) 0xb5;
+
+    // Method invocations
+    public static final byte opc_invokevirtual   = (byte) 0xb6;
+    public static final byte opc_invokespecial   = (byte) 0xb7;
+    public static final byte opc_invokestatic    = (byte) 0xb8;
+    public static final byte opc_invokeinterface = (byte) 0xb9;
+
+    // Array length
+    public static final byte opc_arraylength     = (byte) 0xbe;
+
+    // New
+    public static final byte opc_new           = (byte) 0xbb;
+
+    // Athrow
+    public static final byte opc_athrow        = (byte) 0xbf;
+
+    // Checkcast and instanceof
+    public static final byte opc_checkcast     = (byte) 0xc0;
+    public static final byte opc_instanceof    = (byte) 0xc1;
+
+    // Ifnull and ifnonnull
+    public static final byte opc_ifnull        = (byte) 0xc6;
+    public static final byte opc_ifnonnull     = (byte) 0xc7;
+
+    // Constant pool tags
+    public static final byte CONSTANT_Class              = (byte) 7;
+    public static final byte CONSTANT_Fieldref           = (byte) 9;
+    public static final byte CONSTANT_Methodref          = (byte) 10;
+    public static final byte CONSTANT_InterfaceMethodref = (byte) 11;
+    public static final byte CONSTANT_NameAndType        = (byte) 12;
+    public static final byte CONSTANT_String             = (byte) 8;
+    public static final byte CONSTANT_Utf8               = (byte) 1;
+
+    // Access flags
+    public static final short ACC_PUBLIC = (short) 0x0001;
+}
diff --git a/tests/test_data/std/jdk/internal/reflect/ConstantPool$Tag.class b/tests/test_data/std/jdk/internal/reflect/ConstantPool$Tag.class
new file mode 100644
index 0000000000000000000000000000000000000000..9c4cd2af15d492f3ea811278fb364a3aecd0b598
GIT binary patch
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diff --git a/tests/test_data/std/jdk/internal/reflect/ConstantPool.class b/tests/test_data/std/jdk/internal/reflect/ConstantPool.class
new file mode 100644
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GIT binary patch
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/reflect/ConstantPool.java b/tests/test_data/std/jdk/internal/reflect/ConstantPool.java
new file mode 100644
index 00000000..a4303412
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/reflect/ConstantPool.java
@@ -0,0 +1,132 @@
+/*
+ * Copyright (c) 2003, 2018, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package jdk.internal.reflect;
+
+import java.lang.reflect.*;
+import java.util.Set;
+
+/** Provides reflective access to the constant pools of classes.
+    Currently this is needed to provide reflective access to annotations
+    but may be used by other internal subsystems in the future. */
+
+public class ConstantPool {
+  // Number of entries in this constant pool (= maximum valid constant pool index)
+  public int      getSize()                      { return getSize0            (constantPoolOop);        }
+  public Class<?> getClassAt         (int index) { return getClassAt0         (constantPoolOop, index); }
+  public Class<?> getClassAtIfLoaded (int index) { return getClassAtIfLoaded0 (constantPoolOop, index); }
+  // Returns a class reference index for a method or a field.
+  public int getClassRefIndexAt(int index) {
+      return getClassRefIndexAt0(constantPoolOop, index);
+  }
+  // Returns either a Method or Constructor.
+  // Static initializers are returned as Method objects.
+  public Member   getMethodAt        (int index) { return getMethodAt0        (constantPoolOop, index); }
+  public Member   getMethodAtIfLoaded(int index) { return getMethodAtIfLoaded0(constantPoolOop, index); }
+  public Field    getFieldAt         (int index) { return getFieldAt0         (constantPoolOop, index); }
+  public Field    getFieldAtIfLoaded (int index) { return getFieldAtIfLoaded0 (constantPoolOop, index); }
+  // Fetches the class name, member (field, method or interface
+  // method) name, and type descriptor as an array of three Strings
+  public String[] getMemberRefInfoAt (int index) { return getMemberRefInfoAt0 (constantPoolOop, index); }
+  // Returns a name and type reference index for a method, a field or an invokedynamic.
+  public int getNameAndTypeRefIndexAt(int index) {
+      return getNameAndTypeRefIndexAt0(constantPoolOop, index);
+  }
+  // Fetches the name and type from name_and_type index as an array of two Strings
+  public String[] getNameAndTypeRefInfoAt(int index) {
+      return getNameAndTypeRefInfoAt0(constantPoolOop, index);
+  }
+  public int      getIntAt           (int index) { return getIntAt0           (constantPoolOop, index); }
+  public long     getLongAt          (int index) { return getLongAt0          (constantPoolOop, index); }
+  public float    getFloatAt         (int index) { return getFloatAt0         (constantPoolOop, index); }
+  public double   getDoubleAt        (int index) { return getDoubleAt0        (constantPoolOop, index); }
+  public String   getStringAt        (int index) { return getStringAt0        (constantPoolOop, index); }
+  public String   getUTF8At          (int index) { return getUTF8At0          (constantPoolOop, index); }
+  public Tag getTagAt(int index) {
+      return Tag.valueOf(getTagAt0(constantPoolOop, index));
+  }
+
+  public static enum Tag {
+      UTF8(1),
+      INTEGER(3),
+      FLOAT(4),
+      LONG(5),
+      DOUBLE(6),
+      CLASS(7),
+      STRING(8),
+      FIELDREF(9),
+      METHODREF(10),
+      INTERFACEMETHODREF(11),
+      NAMEANDTYPE(12),
+      METHODHANDLE(15),
+      METHODTYPE(16),
+      INVOKEDYNAMIC(18),
+      INVALID(0);
+
+      private final int tagCode;
+
+      private Tag(int tagCode) {
+          this.tagCode = tagCode;
+      }
+
+      private static Tag valueOf(byte v) {
+          for (Tag tag : Tag.values()) {
+              if (tag.tagCode == v) {
+                  return tag;
+              }
+          }
+          throw new IllegalArgumentException("Unknown constant pool tag code " + v);
+      }
+   }
+  //---------------------------------------------------------------------------
+  // Internals only below this point
+  //
+
+  static {
+      Reflection.registerFieldsToFilter(ConstantPool.class, Set.of("constantPoolOop"));
+  }
+
+  // HotSpot-internal constant pool object (set by the VM, name known to the VM)
+  private Object constantPoolOop;
+
+  private native int      getSize0            (Object constantPoolOop);
+  private native Class<?> getClassAt0         (Object constantPoolOop, int index);
+  private native Class<?> getClassAtIfLoaded0 (Object constantPoolOop, int index);
+  private native int      getClassRefIndexAt0 (Object constantPoolOop, int index);
+  private native Member   getMethodAt0        (Object constantPoolOop, int index);
+  private native Member   getMethodAtIfLoaded0(Object constantPoolOop, int index);
+  private native Field    getFieldAt0         (Object constantPoolOop, int index);
+  private native Field    getFieldAtIfLoaded0 (Object constantPoolOop, int index);
+  private native String[] getMemberRefInfoAt0 (Object constantPoolOop, int index);
+  private native int      getNameAndTypeRefIndexAt0(Object constantPoolOop, int index);
+  private native String[] getNameAndTypeRefInfoAt0(Object constantPoolOop, int index);
+  private native int      getIntAt0           (Object constantPoolOop, int index);
+  private native long     getLongAt0          (Object constantPoolOop, int index);
+  private native float    getFloatAt0         (Object constantPoolOop, int index);
+  private native double   getDoubleAt0        (Object constantPoolOop, int index);
+  private native String   getStringAt0        (Object constantPoolOop, int index);
+  private native String   getUTF8At0          (Object constantPoolOop, int index);
+  private native byte     getTagAt0           (Object constantPoolOop, int index);
+}
diff --git a/tests/test_data/std/jdk/internal/reflect/ConstructorAccessor.class b/tests/test_data/std/jdk/internal/reflect/ConstructorAccessor.class
new file mode 100644
index 0000000000000000000000000000000000000000..d9b38a8e538e1e6cdc3fd7161134b05edd2a1688
GIT binary patch
literal 358
zcmZvYK~4fe5Ji8X(g+AFT^cuHOzZ=&B197s5*M&@)wbni#<rXE^q^;R;Q>69p}^=6
zW%;XK{i<J|U+*6PCKxC*2*cv>S?4}+^v3DPPmXQUli<q~E1N<bTgzn`qQW6zP?(j`
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zhjNZH<Hj+oUf8D{?u2kvb3d7;eiiK2a$#b|^?=+m4^^~$n>&ecx+nbg#;!>q9LVng
Xl3yI5DO!nYNwtMGx}tlc8|beAl{0Ds

literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/reflect/ConstructorAccessor.java b/tests/test_data/std/jdk/internal/reflect/ConstructorAccessor.java
new file mode 100644
index 00000000..30d8baf6
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/reflect/ConstructorAccessor.java
@@ -0,0 +1,41 @@
+/*
+ * Copyright (c) 2001, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package jdk.internal.reflect;
+
+import java.lang.reflect.InvocationTargetException;
+
+/** This interface provides the declaration for
+    java.lang.reflect.Constructor.invoke(). Each Constructor object is
+    configured with a (possibly dynamically-generated) class which
+    implements this interface. */
+
+public interface ConstructorAccessor {
+    /** Matches specification in {@link java.lang.reflect.Constructor} */
+    public Object newInstance(Object[] args)
+        throws InstantiationException,
+               IllegalArgumentException,
+               InvocationTargetException;
+}
diff --git a/tests/test_data/std/jdk/internal/reflect/ConstructorAccessorImpl.class b/tests/test_data/std/jdk/internal/reflect/ConstructorAccessorImpl.class
new file mode 100644
index 0000000000000000000000000000000000000000..ed3a9e21995af422324633a9574e4b7dca4fc4f3
GIT binary patch
literal 624
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/reflect/ConstructorAccessorImpl.java b/tests/test_data/std/jdk/internal/reflect/ConstructorAccessorImpl.java
new file mode 100644
index 00000000..36f73b29
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/reflect/ConstructorAccessorImpl.java
@@ -0,0 +1,41 @@
+/*
+ * Copyright (c) 2001, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package jdk.internal.reflect;
+
+import java.lang.reflect.InvocationTargetException;
+
+/** Package-private implementation of the ConstructorAccessor
+    interface which has access to all classes and all fields,
+    regardless of language restrictions. See MagicAccessorImpl. */
+
+abstract class ConstructorAccessorImpl extends MagicAccessorImpl
+    implements ConstructorAccessor {
+    /** Matches specification in {@link java.lang.reflect.Constructor} */
+    public abstract Object newInstance(Object[] args)
+        throws InstantiationException,
+               IllegalArgumentException,
+               InvocationTargetException;
+}
diff --git a/tests/test_data/std/jdk/internal/reflect/CsMethodAccessorAdapter.class b/tests/test_data/std/jdk/internal/reflect/CsMethodAccessorAdapter.class
new file mode 100644
index 0000000000000000000000000000000000000000..bab8dd3b210924dfe244721bfa5e77d45c7e2947
GIT binary patch
literal 2503
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/reflect/CsMethodAccessorAdapter.java b/tests/test_data/std/jdk/internal/reflect/CsMethodAccessorAdapter.java
new file mode 100644
index 00000000..a2cfae6e
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/reflect/CsMethodAccessorAdapter.java
@@ -0,0 +1,72 @@
+/*
+ * Copyright (c) 2021, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package jdk.internal.reflect;
+
+import jdk.internal.vm.annotation.ForceInline;
+import jdk.internal.vm.annotation.Hidden;
+
+import java.lang.reflect.InvocationTargetException;
+import java.lang.reflect.Method;
+
+/**
+ * MethodAccessor adapter for caller-sensitive methods which have
+ * an alternate non-CSM method with the same method name but an additional
+ * caller class argument.
+ *
+ * When a caller-sensitive method is called,
+ * Method::invoke(Object target, Object[] args, Class<?> caller) will
+ * be invoked with the caller class.  If an adapter is present,
+ * the adapter method with the caller class parameter will be called
+ * instead.
+ */
+class CsMethodAccessorAdapter extends MethodAccessorImpl {
+    private final Method csmAdapter;
+    private final MethodAccessor accessor;
+
+    CsMethodAccessorAdapter(Method method, Method csmAdapter, MethodAccessor accessor) {
+        assert Reflection.isCallerSensitive(method) && !Reflection.isCallerSensitive(csmAdapter);
+        this.csmAdapter = csmAdapter;
+        this.accessor = accessor;
+    }
+
+    @Override
+    public Object invoke(Object obj, Object[] args)
+            throws IllegalArgumentException, InvocationTargetException {
+        throw new InternalError("caller-sensitive method invoked without explicit caller: " + csmAdapter);
+    }
+
+    @Override
+    @ForceInline
+    @Hidden
+    public Object invoke(Object obj, Object[] args, Class<?> caller)
+            throws IllegalArgumentException, InvocationTargetException {
+        Object[] newArgs = new Object[args == null ? 1 : args.length + 1];
+        newArgs[0] = caller;
+        if (args != null) {
+            System.arraycopy(args, 0, newArgs, 1, args.length);
+        }
+        return accessor.invoke(obj, newArgs);
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/reflect/DelegatingClassLoader.class b/tests/test_data/std/jdk/internal/reflect/DelegatingClassLoader.class
new file mode 100644
index 0000000000000000000000000000000000000000..eb12e25f5eddde12751811563140ef4781cbab8e
GIT binary patch
literal 399
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/reflect/DirectConstructorHandleAccessor$NativeAccessor.class b/tests/test_data/std/jdk/internal/reflect/DirectConstructorHandleAccessor$NativeAccessor.class
new file mode 100644
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/reflect/DirectConstructorHandleAccessor.class b/tests/test_data/std/jdk/internal/reflect/DirectConstructorHandleAccessor.class
new file mode 100644
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/reflect/DirectConstructorHandleAccessor.java b/tests/test_data/std/jdk/internal/reflect/DirectConstructorHandleAccessor.java
new file mode 100644
index 00000000..03a327b9
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/reflect/DirectConstructorHandleAccessor.java
@@ -0,0 +1,110 @@
+/*
+ * Copyright (c) 2021, 2023, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package jdk.internal.reflect;
+
+import jdk.internal.vm.annotation.ForceInline;
+import jdk.internal.vm.annotation.Hidden;
+
+import java.lang.invoke.MethodHandle;
+import java.lang.invoke.WrongMethodTypeException;
+import java.lang.reflect.Constructor;
+import java.lang.reflect.InvocationTargetException;
+
+import static jdk.internal.reflect.MethodHandleAccessorFactory.SPECIALIZED_PARAM_COUNT;
+
+class DirectConstructorHandleAccessor extends ConstructorAccessorImpl {
+    static ConstructorAccessorImpl constructorAccessor(Constructor<?> ctor, MethodHandle target) {
+        return new DirectConstructorHandleAccessor(ctor, target);
+    }
+
+    static ConstructorAccessorImpl nativeAccessor(Constructor<?> ctor) {
+        return new NativeAccessor(ctor);
+    }
+
+    private final int paramCount;
+    private final MethodHandle target;
+
+    DirectConstructorHandleAccessor(Constructor<?> ctor, MethodHandle target) {
+        this.paramCount = ctor.getParameterCount();
+        this.target = target;
+    }
+
+    @Override
+    public Object newInstance(Object[] args) throws InstantiationException, InvocationTargetException {
+        int argc = args != null ? args.length : 0;
+        if (argc != paramCount) {
+            throw new IllegalArgumentException("wrong number of arguments: " + argc + " expected: " + paramCount);
+        }
+        try {
+            return invokeImpl(args);
+        } catch (ClassCastException|WrongMethodTypeException e) {
+            if (isIllegalArgument(e))
+                throw new IllegalArgumentException("argument type mismatch", e);
+            else
+                throw new InvocationTargetException(e);
+        } catch (NullPointerException e) {
+            if (isIllegalArgument(e))
+                throw new IllegalArgumentException(e);
+            else
+                throw new InvocationTargetException(e);
+        } catch (Throwable e) {
+            throw new InvocationTargetException(e);
+        }
+    }
+
+    private boolean isIllegalArgument(RuntimeException ex) {
+        return AccessorUtils.isIllegalArgument(DirectConstructorHandleAccessor.class, ex);
+    }
+
+    @Hidden
+    @ForceInline
+    Object invokeImpl(Object[] args) throws Throwable {
+        return switch (paramCount) {
+            case 0 -> target.invokeExact();
+            case 1 -> target.invokeExact(args[0]);
+            case 2 -> target.invokeExact(args[0], args[1]);
+            case 3 -> target.invokeExact(args[0], args[1], args[2]);
+            default -> target.invokeExact(args);
+        };
+    }
+
+    /**
+     * Invoke the constructor via native VM reflection
+     */
+    static class NativeAccessor extends ConstructorAccessorImpl {
+        private final Constructor<?> ctor;
+        NativeAccessor(Constructor<?> ctor) {
+            this.ctor = ctor;
+        }
+
+        @Override
+        public Object newInstance(Object[] args) throws InstantiationException, InvocationTargetException {
+            return newInstance0(ctor, args);
+        }
+        private static native Object newInstance0(Constructor<?> c, Object[] args)
+                    throws InstantiationException, InvocationTargetException;
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/reflect/DirectMethodHandleAccessor$NativeAccessor$ReflectiveInvoker.class b/tests/test_data/std/jdk/internal/reflect/DirectMethodHandleAccessor$NativeAccessor$ReflectiveInvoker.class
new file mode 100644
index 0000000000000000000000000000000000000000..94bb9b7eed8258ced4e0c529284346637d2fbd6d
GIT binary patch
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HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/reflect/DirectMethodHandleAccessor$NativeAccessor.class b/tests/test_data/std/jdk/internal/reflect/DirectMethodHandleAccessor$NativeAccessor.class
new file mode 100644
index 0000000000000000000000000000000000000000..de55d0765f5a2ab73ccccba7fa03a7f2e7c347a6
GIT binary patch
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HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/reflect/DirectMethodHandleAccessor.class b/tests/test_data/std/jdk/internal/reflect/DirectMethodHandleAccessor.class
new file mode 100644
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HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/reflect/DirectMethodHandleAccessor.java b/tests/test_data/std/jdk/internal/reflect/DirectMethodHandleAccessor.java
new file mode 100644
index 00000000..f345d4cd
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/reflect/DirectMethodHandleAccessor.java
@@ -0,0 +1,354 @@
+/*
+ * Copyright (c) 2021, 2023, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package jdk.internal.reflect;
+
+import jdk.internal.access.JavaLangInvokeAccess;
+import jdk.internal.access.SharedSecrets;
+import jdk.internal.misc.VM;
+import jdk.internal.vm.annotation.ForceInline;
+import jdk.internal.vm.annotation.Hidden;
+
+import java.lang.invoke.MethodHandle;
+import java.lang.invoke.MethodHandles;
+import java.lang.invoke.WrongMethodTypeException;
+import java.lang.reflect.InvocationTargetException;
+import java.lang.reflect.Method;
+import java.lang.reflect.Modifier;
+
+import static java.lang.invoke.MethodType.genericMethodType;
+import static jdk.internal.reflect.MethodHandleAccessorFactory.LazyStaticHolder.JLIA;
+
+class DirectMethodHandleAccessor extends MethodAccessorImpl {
+    /**
+     * Creates a MethodAccessorImpl for a non-native method.
+     */
+    static MethodAccessorImpl methodAccessor(Method method, MethodHandle target) {
+        assert !Modifier.isNative(method.getModifiers());
+
+        return new DirectMethodHandleAccessor(method, target, false);
+    }
+
+    /**
+     * Creates MethodAccessorImpl for the adapter method for a caller-sensitive method.
+     * The given target method handle is the adapter method with the additional caller class
+     * parameter.
+     */
+    static MethodAccessorImpl callerSensitiveAdapter(Method original, MethodHandle target) {
+        assert Reflection.isCallerSensitive(original);
+
+        // for CSM adapter method with the additional caller class parameter
+        // creates the adaptive method accessor only.
+        return new DirectMethodHandleAccessor(original, target, true);
+    }
+
+    /**
+     * Creates MethodAccessorImpl that invokes the given method via VM native reflection
+     * support.  This is used for native methods.  It can be used for java methods
+     * during early VM startup.
+     */
+    static MethodAccessorImpl nativeAccessor(Method method, boolean callerSensitive) {
+        return callerSensitive ? new NativeAccessor(method, findCSMethodAdapter(method))
+                               : new NativeAccessor(method);
+    }
+
+    private static final int PARAM_COUNT_MASK = 0x00FF;
+    private static final int HAS_CALLER_PARAM_BIT = 0x0100;
+    private static final int IS_STATIC_BIT = 0x0200;
+    private static final int NONZERO_BIT = 0x8000_0000;
+
+    private final Class<?> declaringClass;
+    private final int paramCount;
+    private final int flags;
+    private final MethodHandle target;
+
+    DirectMethodHandleAccessor(Method method, MethodHandle target, boolean hasCallerParameter) {
+        this.declaringClass = method.getDeclaringClass();
+        this.paramCount = method.getParameterCount();
+        this.flags = (hasCallerParameter ? HAS_CALLER_PARAM_BIT : 0) |
+                     (Modifier.isStatic(method.getModifiers()) ? IS_STATIC_BIT : 0);
+        this.target = target;
+    }
+
+    @Override
+    @ForceInline
+    public Object invoke(Object obj, Object[] args) throws InvocationTargetException {
+        if (!isStatic()) {
+            checkReceiver(obj);
+        }
+        checkArgumentCount(paramCount, args);
+        try {
+            return invokeImpl(obj, args);
+        } catch (ClassCastException | WrongMethodTypeException e) {
+            if (isIllegalArgument(e)) {
+                // No cause in IAE to be consistent with the old behavior
+                throw new IllegalArgumentException("argument type mismatch");
+            } else {
+                throw new InvocationTargetException(e);
+            }
+        } catch (NullPointerException e) {
+            if (isIllegalArgument(e)) {
+                throw new IllegalArgumentException(e);
+            } else {
+                throw new InvocationTargetException(e);
+            }
+        } catch (Throwable e) {
+            throw new InvocationTargetException(e);
+        }
+    }
+
+    @Override
+    @ForceInline
+    public Object invoke(Object obj, Object[] args, Class<?> caller) throws InvocationTargetException {
+        if (!isStatic()) {
+            checkReceiver(obj);
+        }
+        checkArgumentCount(paramCount, args);
+        try {
+            return invokeImpl(obj, args, caller);
+        } catch (ClassCastException | WrongMethodTypeException e) {
+            if (isIllegalArgument(e)) {
+                // No cause in IAE to be consistent with the old behavior
+                throw new IllegalArgumentException("argument type mismatch");
+            } else {
+                throw new InvocationTargetException(e);
+            }
+        } catch (NullPointerException e) {
+            if (isIllegalArgument(e)) {
+                throw new IllegalArgumentException(e);
+            } else {
+                throw new InvocationTargetException(e);
+            }
+        } catch (Throwable e) {
+            throw new InvocationTargetException(e);
+        }
+    }
+
+    @Hidden
+    @ForceInline
+    private Object invokeImpl(Object obj, Object[] args) throws Throwable {
+        return switch (paramCount) {
+            case 0 -> target.invokeExact(obj);
+            case 1 -> target.invokeExact(obj, args[0]);
+            case 2 -> target.invokeExact(obj, args[0], args[1]);
+            case 3 -> target.invokeExact(obj, args[0], args[1], args[2]);
+            default -> target.invokeExact(obj, args);
+        };
+    }
+
+    @Hidden
+    @ForceInline
+    private Object invokeImpl(Object obj, Object[] args, Class<?> caller) throws Throwable {
+        if (hasCallerParameter()) {
+            // caller-sensitive method is invoked through method with caller parameter
+            return switch (paramCount) {
+                case 0 -> target.invokeExact(obj, caller);
+                case 1 -> target.invokeExact(obj, args[0], caller);
+                case 2 -> target.invokeExact(obj, args[0], args[1], caller);
+                case 3 -> target.invokeExact(obj, args[0], args[1], args[2], caller);
+                default -> target.invokeExact(obj, args, caller);
+            };
+        } else {
+            // caller-sensitive method is invoked through a per-caller invoker while
+            // the target MH is always spreading the args
+            var invoker = JLIA.reflectiveInvoker(caller);
+            // invoke the target method handle via an invoker
+            return invoker.invokeExact(target, obj, args);
+        }
+    }
+
+    private boolean isStatic() {
+        return (flags & IS_STATIC_BIT) == IS_STATIC_BIT;
+    }
+
+    private boolean hasCallerParameter() {
+        return (flags & HAS_CALLER_PARAM_BIT) == HAS_CALLER_PARAM_BIT;
+    }
+
+    private boolean isIllegalArgument(RuntimeException ex) {
+        return AccessorUtils.isIllegalArgument(DirectMethodHandleAccessor.class, ex);
+    }
+
+    private void checkReceiver(Object o) {
+        // NOTE: will throw NullPointerException, as specified, if o is null
+        if (!declaringClass.isAssignableFrom(o.getClass())) {
+            throw new IllegalArgumentException("object of type " + o.getClass().getName()
+                    + " is not an instance of " + declaringClass.getName());
+        }
+    }
+
+    /**
+     * Invoke the method via native VM reflection
+     */
+    static class NativeAccessor extends MethodAccessorImpl {
+        private final Method method;
+        private final Method csmAdapter;
+        private final boolean callerSensitive;
+        NativeAccessor(Method method) {
+            assert !Reflection.isCallerSensitive(method);
+            this.method = method;
+            this.csmAdapter = null;
+            this.callerSensitive = false;
+        }
+
+        NativeAccessor(Method method, Method csmAdapter) {
+            assert Reflection.isCallerSensitive(method);
+            this.method = method;
+            this.csmAdapter = csmAdapter;
+            this.callerSensitive = true;
+        }
+
+        @Override
+        public Object invoke(Object obj, Object[] args) throws InvocationTargetException {
+            assert csmAdapter == null;
+            return invoke0(method, obj, args);
+        }
+
+        @Override
+        public Object invoke(Object obj, Object[] args, Class<?> caller) throws InvocationTargetException {
+            assert callerSensitive;
+
+            if (csmAdapter != null) {
+                Object[] newArgs = new Object[csmAdapter.getParameterCount()];
+                newArgs[0] = caller;
+                if (args != null) {
+                    System.arraycopy(args, 0, newArgs, 1, args.length);
+                }
+                return invoke0(csmAdapter, obj, newArgs);
+            } else {
+                assert VM.isJavaLangInvokeInited();
+                try {
+                    return ReflectiveInvoker.invoke(methodAccessorInvoker(), caller, obj, args);
+                } catch (InvocationTargetException|RuntimeException|Error e) {
+                    throw e;
+                } catch (Throwable e) {
+                    throw new InternalError(e);
+                }
+            }
+        }
+
+        public Object invokeViaReflectiveInvoker(Object obj, Object[] args) throws InvocationTargetException {
+            return invoke0(method, obj, args);
+        }
+
+        /*
+         * A method handle to invoke Reflective::Invoker
+         */
+        private MethodHandle maInvoker;
+        private MethodHandle methodAccessorInvoker() {
+            MethodHandle invoker = maInvoker;
+            if (invoker == null) {
+                maInvoker = invoker = ReflectiveInvoker.bindTo(this);
+            }
+            return invoker;
+        }
+
+        private static native Object invoke0(Method m, Object obj, Object[] args);
+
+        static class ReflectiveInvoker {
+            /**
+             * Return a method handle for NativeAccessor::invoke bound to the given accessor object
+             */
+            static MethodHandle bindTo(NativeAccessor accessor) {
+                return NATIVE_ACCESSOR_INVOKE.bindTo(accessor);
+            }
+
+            /*
+             * When Method::invoke on a caller-sensitive method is to be invoked
+             * and no adapter method with an additional caller class argument is defined,
+             * the caller-sensitive method must be invoked via an invoker injected
+             * which has the following signature:
+             *     reflect_invoke_V(MethodHandle mh, Object target, Object[] args)
+             *
+             * The stack frames calling the method `csm` through reflection will
+             * look like this:
+             *     obj.csm(args)
+             *     NativeAccessor::invoke(obj, args)
+             *     InjectedInvoker::reflect_invoke_V(vamh, obj, args);
+             *     method::invoke(obj, args)
+             *     p.Foo::m
+             *
+             * An injected invoker class is a hidden class which has the same
+             * defining class loader, runtime package, and protection domain
+             * as the given caller class.
+             *
+             * The caller-sensitive method will call Reflection::getCallerClass
+             * to get the caller class.
+             */
+            static Object invoke(MethodHandle target, Class<?> caller, Object obj, Object[] args)
+                    throws InvocationTargetException
+            {
+                var reflectInvoker = JLIA.reflectiveInvoker(caller);
+                try {
+                    return reflectInvoker.invokeExact(target, obj, args);
+                } catch (InvocationTargetException | RuntimeException | Error e) {
+                    throw e;
+                } catch (Throwable e) {
+                    throw new InternalError(e);
+                }
+            }
+
+            static final JavaLangInvokeAccess JLIA;
+            static final MethodHandle NATIVE_ACCESSOR_INVOKE;
+            static {
+                try {
+                    JLIA = SharedSecrets.getJavaLangInvokeAccess();
+                    NATIVE_ACCESSOR_INVOKE = MethodHandles.lookup().findVirtual(NativeAccessor.class, "invoke",
+                            genericMethodType(1, true));
+                } catch (NoSuchMethodException|IllegalAccessException e) {
+                    throw new InternalError(e);
+                }
+            }
+        }
+    }
+
+    private static void checkArgumentCount(int paramCount, Object[] args) {
+        int argc = args != null ? args.length : 0;
+        if (argc != paramCount) {
+            throw new IllegalArgumentException("wrong number of arguments: " + argc + " expected: " + paramCount);
+        }
+    }
+
+    /**
+     * Returns an adapter for caller-sensitive method if present.
+     * Otherwise, null.
+     *
+     * A trusted method can define an adapter method for a caller-sensitive method `foo`
+     * with an additional caller class argument that will be invoked reflectively.
+     */
+    private static Method findCSMethodAdapter(Method method) {
+        if (!Reflection.isCallerSensitive(method)) return null;
+
+        int paramCount = method.getParameterCount();
+        Class<?>[] ptypes = new Class<?>[paramCount+1];
+        ptypes[paramCount] = Class.class;
+        System.arraycopy(method.getParameterTypes(), 0, ptypes, 0, paramCount);
+        try {
+            return method.getDeclaringClass().getDeclaredMethod(method.getName(), ptypes);
+        } catch (NoSuchMethodException ex) {
+            return null;
+        }
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/reflect/FieldAccessor.class b/tests/test_data/std/jdk/internal/reflect/FieldAccessor.class
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diff --git a/tests/test_data/std/jdk/internal/reflect/FieldAccessor.java b/tests/test_data/std/jdk/internal/reflect/FieldAccessor.java
new file mode 100644
index 00000000..0df292af
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/reflect/FieldAccessor.java
@@ -0,0 +1,96 @@
+/*
+ * Copyright (c) 2001, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package jdk.internal.reflect;
+
+/** This interface provides the declarations for the accessor methods
+    of java.lang.reflect.Field. Each Field object is configured with a
+    (possibly dynamically-generated) class which implements this
+    interface. */
+
+public interface FieldAccessor {
+    /** Matches specification in {@link java.lang.reflect.Field} */
+    public Object get(Object obj) throws IllegalArgumentException;
+
+    /** Matches specification in {@link java.lang.reflect.Field} */
+    public boolean getBoolean(Object obj) throws IllegalArgumentException;
+
+    /** Matches specification in {@link java.lang.reflect.Field} */
+    public byte getByte(Object obj) throws IllegalArgumentException;
+
+    /** Matches specification in {@link java.lang.reflect.Field} */
+    public char getChar(Object obj) throws IllegalArgumentException;
+
+    /** Matches specification in {@link java.lang.reflect.Field} */
+    public short getShort(Object obj) throws IllegalArgumentException;
+
+    /** Matches specification in {@link java.lang.reflect.Field} */
+    public int getInt(Object obj) throws IllegalArgumentException;
+
+    /** Matches specification in {@link java.lang.reflect.Field} */
+    public long getLong(Object obj) throws IllegalArgumentException;
+
+    /** Matches specification in {@link java.lang.reflect.Field} */
+    public float getFloat(Object obj) throws IllegalArgumentException;
+
+    /** Matches specification in {@link java.lang.reflect.Field} */
+    public double getDouble(Object obj) throws IllegalArgumentException;
+
+    /** Matches specification in {@link java.lang.reflect.Field} */
+    public void set(Object obj, Object value)
+        throws IllegalArgumentException, IllegalAccessException;
+
+    /** Matches specification in {@link java.lang.reflect.Field} */
+    public void setBoolean(Object obj, boolean z)
+        throws IllegalArgumentException, IllegalAccessException;
+
+    /** Matches specification in {@link java.lang.reflect.Field} */
+    public void setByte(Object obj, byte b)
+        throws IllegalArgumentException, IllegalAccessException;
+
+    /** Matches specification in {@link java.lang.reflect.Field} */
+    public void setChar(Object obj, char c)
+        throws IllegalArgumentException, IllegalAccessException;
+
+    /** Matches specification in {@link java.lang.reflect.Field} */
+    public void setShort(Object obj, short s)
+        throws IllegalArgumentException, IllegalAccessException;
+
+    /** Matches specification in {@link java.lang.reflect.Field} */
+    public void setInt(Object obj, int i)
+        throws IllegalArgumentException, IllegalAccessException;
+
+    /** Matches specification in {@link java.lang.reflect.Field} */
+    public void setLong(Object obj, long l)
+        throws IllegalArgumentException, IllegalAccessException;
+
+    /** Matches specification in {@link java.lang.reflect.Field} */
+    public void setFloat(Object obj, float f)
+        throws IllegalArgumentException, IllegalAccessException;
+
+    /** Matches specification in {@link java.lang.reflect.Field} */
+    public void setDouble(Object obj, double d)
+        throws IllegalArgumentException, IllegalAccessException;
+}
diff --git a/tests/test_data/std/jdk/internal/reflect/FieldAccessorImpl.class b/tests/test_data/std/jdk/internal/reflect/FieldAccessorImpl.class
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z-mZcJ(eYP25D%~?9W3%!JP;2$15toa2Z7$K3ILxW@K9Nx%qjsM2m-yi8UQ{=;PZN*
zGMu?8z(YZxH}V3&!vwxq1{j8nJOMr%1bTxm06a?IOL`#OK_|c$e4sxlyzy2FRQ$Q2
zlpd&RAmdGdhkan_PzwM<1Xk&R4229e0Uq&z{tCTO7666`tkDBi1TxB$8pjH+P|^PZ
DTPgkc

literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/reflect/FieldAccessorImpl.java b/tests/test_data/std/jdk/internal/reflect/FieldAccessorImpl.java
new file mode 100644
index 00000000..baeb6bf8
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/reflect/FieldAccessorImpl.java
@@ -0,0 +1,267 @@
+/*
+ * Copyright (c) 2001, 2021, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package jdk.internal.reflect;
+
+import java.lang.reflect.Field;
+import java.lang.reflect.Modifier;
+
+/** Package-private implementation of the FieldAccessor interface
+    which has access to all classes and all fields, regardless of
+    language restrictions. See MagicAccessorImpl. */
+
+abstract class FieldAccessorImpl extends MagicAccessorImpl
+    implements FieldAccessor {
+    protected final Field field;
+
+    FieldAccessorImpl(Field field) {
+        this.field = field;
+    }
+
+    /** Matches specification in {@link java.lang.reflect.Field} */
+    public abstract Object get(Object obj)
+        throws IllegalArgumentException;
+
+    /** Matches specification in {@link java.lang.reflect.Field} */
+    public abstract boolean getBoolean(Object obj)
+        throws IllegalArgumentException;
+
+    /** Matches specification in {@link java.lang.reflect.Field} */
+    public abstract byte getByte(Object obj)
+        throws IllegalArgumentException;
+
+    /** Matches specification in {@link java.lang.reflect.Field} */
+    public abstract char getChar(Object obj)
+        throws IllegalArgumentException;
+
+    /** Matches specification in {@link java.lang.reflect.Field} */
+    public abstract short getShort(Object obj)
+        throws IllegalArgumentException;
+
+    /** Matches specification in {@link java.lang.reflect.Field} */
+    public abstract int getInt(Object obj)
+        throws IllegalArgumentException;
+
+    /** Matches specification in {@link java.lang.reflect.Field} */
+    public abstract long getLong(Object obj)
+        throws IllegalArgumentException;
+
+    /** Matches specification in {@link java.lang.reflect.Field} */
+    public abstract float getFloat(Object obj)
+        throws IllegalArgumentException;
+
+    /** Matches specification in {@link java.lang.reflect.Field} */
+    public abstract double getDouble(Object obj)
+        throws IllegalArgumentException;
+
+    /** Matches specification in {@link java.lang.reflect.Field} */
+    public abstract void set(Object obj, Object value)
+        throws IllegalArgumentException, IllegalAccessException;
+
+    /** Matches specification in {@link java.lang.reflect.Field} */
+    public abstract void setBoolean(Object obj, boolean z)
+        throws IllegalArgumentException, IllegalAccessException;
+
+    /** Matches specification in {@link java.lang.reflect.Field} */
+    public abstract void setByte(Object obj, byte b)
+        throws IllegalArgumentException, IllegalAccessException;
+
+    /** Matches specification in {@link java.lang.reflect.Field} */
+    public abstract void setChar(Object obj, char c)
+        throws IllegalArgumentException, IllegalAccessException;
+
+    /** Matches specification in {@link java.lang.reflect.Field} */
+    public abstract void setShort(Object obj, short s)
+        throws IllegalArgumentException, IllegalAccessException;
+
+    /** Matches specification in {@link java.lang.reflect.Field} */
+    public abstract void setInt(Object obj, int i)
+        throws IllegalArgumentException, IllegalAccessException;
+
+    /** Matches specification in {@link java.lang.reflect.Field} */
+    public abstract void setLong(Object obj, long l)
+        throws IllegalArgumentException, IllegalAccessException;
+
+    /** Matches specification in {@link java.lang.reflect.Field} */
+    public abstract void setFloat(Object obj, float f)
+        throws IllegalArgumentException, IllegalAccessException;
+
+    /** Matches specification in {@link java.lang.reflect.Field} */
+    public abstract void setDouble(Object obj, double d)
+        throws IllegalArgumentException, IllegalAccessException;
+
+
+    protected void ensureObj(Object o) {
+        // NOTE: will throw NullPointerException, as specified, if o is null
+        if (!field.getDeclaringClass().isAssignableFrom(o.getClass())) {
+            throwSetIllegalArgumentException(o);
+        }
+    }
+
+    protected String getQualifiedFieldName() {
+        return field.getDeclaringClass().getName() + "." +field.getName();
+    }
+
+    protected IllegalArgumentException newGetIllegalArgumentException(String type) {
+        return new IllegalArgumentException(
+                "Attempt to get "+field.getType().getName()+" field \"" +
+                        getQualifiedFieldName() + "\" with illegal data type conversion to "+type
+        );
+    }
+
+    protected void throwFinalFieldIllegalAccessException(String attemptedType,
+                                                         String attemptedValue)
+            throws IllegalAccessException {
+        throw new IllegalAccessException(getSetMessage(attemptedType, attemptedValue));
+    }
+
+    protected void throwFinalFieldIllegalAccessException(Object o) throws IllegalAccessException {
+        throwFinalFieldIllegalAccessException(o != null ? o.getClass().getName() : "", "");
+    }
+
+    protected void throwFinalFieldIllegalAccessException(boolean z) throws IllegalAccessException {
+        throwFinalFieldIllegalAccessException("boolean", Boolean.toString(z));
+    }
+
+    protected void throwFinalFieldIllegalAccessException(char b) throws IllegalAccessException {
+        throwFinalFieldIllegalAccessException("char", Character.toString(b));
+    }
+
+    protected void throwFinalFieldIllegalAccessException(byte b) throws IllegalAccessException {
+        throwFinalFieldIllegalAccessException("byte", Byte.toString(b));
+    }
+
+    protected void throwFinalFieldIllegalAccessException(short b) throws IllegalAccessException {
+        throwFinalFieldIllegalAccessException("short", Short.toString(b));
+    }
+
+    protected void throwFinalFieldIllegalAccessException(int i) throws IllegalAccessException {
+        throwFinalFieldIllegalAccessException("int", Integer.toString(i));
+    }
+
+    protected void throwFinalFieldIllegalAccessException(long i) throws IllegalAccessException {
+        throwFinalFieldIllegalAccessException("long", Long.toString(i));
+    }
+
+    protected void throwFinalFieldIllegalAccessException(float f) throws IllegalAccessException {
+        throwFinalFieldIllegalAccessException("float", Float.toString(f));
+    }
+
+    protected void throwFinalFieldIllegalAccessException(double f) throws IllegalAccessException {
+        throwFinalFieldIllegalAccessException("double", Double.toString(f));
+    }
+
+    protected IllegalArgumentException newGetBooleanIllegalArgumentException() {
+        return newGetIllegalArgumentException("boolean");
+    }
+
+    protected IllegalArgumentException newGetByteIllegalArgumentException() {
+        return newGetIllegalArgumentException("byte");
+    }
+
+    protected IllegalArgumentException newGetCharIllegalArgumentException() {
+        return newGetIllegalArgumentException("char");
+    }
+
+    protected IllegalArgumentException newGetShortIllegalArgumentException() {
+        return newGetIllegalArgumentException("short");
+    }
+
+    protected IllegalArgumentException newGetIntIllegalArgumentException() {
+        return newGetIllegalArgumentException("int");
+    }
+
+    protected IllegalArgumentException newGetLongIllegalArgumentException() {
+        return newGetIllegalArgumentException("long");
+    }
+
+    protected IllegalArgumentException newGetFloatIllegalArgumentException() {
+        return newGetIllegalArgumentException("float");
+    }
+
+    protected IllegalArgumentException newGetDoubleIllegalArgumentException() {
+        return newGetIllegalArgumentException("double");
+    }
+
+    protected String getSetMessage(String attemptedType, String attemptedValue) {
+        String err = "Can not set";
+        if (Modifier.isStatic(field.getModifiers()))
+            err += " static";
+        if (Modifier.isFinal(field.getModifiers()))
+            err += " final";
+        err += " " + field.getType().getName() + " field " + getQualifiedFieldName() + " to ";
+        if (!attemptedValue.isEmpty()) {
+            err += "(" + attemptedType + ")" + attemptedValue;
+        } else {
+            if (!attemptedType.isEmpty())
+                err += attemptedType;
+            else
+                err += "null value";
+        }
+        return err;
+    }
+
+    protected void throwSetIllegalArgumentException(String attemptedType,
+                                                    String attemptedValue) {
+        throw new IllegalArgumentException(getSetMessage(attemptedType,attemptedValue));
+    }
+
+    protected void throwSetIllegalArgumentException(Object o) {
+        throwSetIllegalArgumentException(o != null ? o.getClass().getName() : "", "");
+    }
+
+    protected void throwSetIllegalArgumentException(boolean b) {
+        throwSetIllegalArgumentException("boolean", Boolean.toString(b));
+    }
+
+    protected void throwSetIllegalArgumentException(byte b) {
+        throwSetIllegalArgumentException("byte", Byte.toString(b));
+    }
+
+    protected void throwSetIllegalArgumentException(char c) {
+        throwSetIllegalArgumentException("char", Character.toString(c));
+    }
+
+    protected void throwSetIllegalArgumentException(short s) {
+        throwSetIllegalArgumentException("short", Short.toString(s));
+    }
+
+    protected void throwSetIllegalArgumentException(int i) {
+        throwSetIllegalArgumentException("int", Integer.toString(i));
+    }
+
+    protected void throwSetIllegalArgumentException(long l) {
+        throwSetIllegalArgumentException("long", Long.toString(l));
+    }
+
+    protected void throwSetIllegalArgumentException(float f) {
+        throwSetIllegalArgumentException("float", Float.toString(f));
+    }
+
+    protected void throwSetIllegalArgumentException(double d) {
+        throwSetIllegalArgumentException("double", Double.toString(d));
+    }
+
+}
diff --git a/tests/test_data/std/jdk/internal/reflect/InstantiationExceptionConstructorAccessorImpl.class b/tests/test_data/std/jdk/internal/reflect/InstantiationExceptionConstructorAccessorImpl.class
new file mode 100644
index 0000000000000000000000000000000000000000..10626f84e214f97833938e0ce2961b318000fe8a
GIT binary patch
literal 906
zcmbtS-)|B@5dN0KUOAxD)~XeMRBJ3y<28N7n6zjU64VD8661@@c0HFKdt`5^{#zzC
zB%0Vq6aOgVEUiFN`sB;(%<Rnf&9C2ozW)T!z~cZJcs{ZPT*Csx)85f>sI-+v^Efo}
zV=RRY8;MS>848=2Jt1V8CZ^dR#0(41l~(ozgIB3`a#%#pM^Hc>1%~~(P)$PO+A3~U
zqF;Rxa^RFJ3H&~>@klbPw0iu6hcVYt*tSOLsP1ElVPoo^j~$>0&xz}<#}$UP%4Mi(
zhauZYj)<t#Qd+(l_Pf#?@@_n)P6UrT+$d*XIJ5SXN*P|Z{=dySLte|z=j96`+^W2v
zDe-N$M@y(zFT1E_ZX&8;bxu4(v2D3He$59LB?psvr#>DqJenC@9LtEudnOw8rM8nm
z9}gL}r*Z!-qNz`4CT?|yRDql(Fa+&nXoNgaZgjizcXGwPpE)9I&>dyyI%((bl1OtF
zt&Tjaq#cm$JV9*)R@**>|8*R5gX9uCl24Gu7ILUyjjWsJ(e&OTi}J>(jL>dlo&Fr=
z2g-Ap<=Qv+zmWfd;=2(_XYO^b5th&B+ryM3gpVDRuscIio{*Gr2W6tTJI-Py+#_X?
P0E)Oz9n$d0&S3K|P_^ix

literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/reflect/InstantiationExceptionConstructorAccessorImpl.java b/tests/test_data/std/jdk/internal/reflect/InstantiationExceptionConstructorAccessorImpl.java
new file mode 100644
index 00000000..7ec7dd32
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/reflect/InstantiationExceptionConstructorAccessorImpl.java
@@ -0,0 +1,52 @@
+/*
+ * Copyright (c) 2001, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package jdk.internal.reflect;
+
+import java.lang.reflect.Constructor;
+import java.lang.reflect.InvocationTargetException;
+
+/** Throws an InstantiationException with given error message upon
+    newInstance() call */
+
+class InstantiationExceptionConstructorAccessorImpl
+    extends ConstructorAccessorImpl {
+    private final String message;
+
+    InstantiationExceptionConstructorAccessorImpl(String message) {
+        this.message = message;
+    }
+
+    public Object newInstance(Object[] args)
+        throws InstantiationException,
+               IllegalArgumentException,
+               InvocationTargetException
+    {
+        if (message == null) {
+            throw new InstantiationException();
+        }
+        throw new InstantiationException(message);
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/reflect/Label$PatchInfo.class b/tests/test_data/std/jdk/internal/reflect/Label$PatchInfo.class
new file mode 100644
index 0000000000000000000000000000000000000000..18de40e8ef12256f98b2c38a42a5743b09fd5808
GIT binary patch
literal 692
zcma)3O>fgc5Ph3CpO`i+ln>ML)qolo>I=6bBnU!8iV9Lt?i+VYoI2~uyXDMZ;t(Nm
z;0N%d5N{0PfO6nqznPtxeQ)3V`1$QSfFT}rQA53jAVdRAh2BDc(n+rE$K>5?VN$Qq
ze4g3Nzfh<j45l5l(P^O@;tE2A{^ImJ$*eb})p=5yvz#NzSkFw}f3JNyAK9~lliDp6
z2IIBe!(2P}Cd<uB=ge}JoAOv#HbQKor_j!<^X04INI^}cupQ!BRk#oW7UXaz#0}h3
z=sK^{^VjCW&)LtJ<lw(qCzH`&st^o|Q=_ms&a64PT+U4SK~t5&_P9uOKGkI=`JcnU
z&oig+cs<KMP8?I<q_`|oBkyHW)sMt;KJ>&m|F&?xg@+2!TCb{pg>Yo8DJ$a)$vc0o
z#(jEG<7NZ&WJ8R4Vq=ALtwI__RQwvaMZC@EGp8EFDE<l+AFj}fcUQO?@2#*E?*uDc
z|H5hwk@TR+e@u=;bnpZlc*>0&@ty>CSb6sQChTI5ne>Yi;fpFQqA!viqFzO!Ct!S+
USq=C22Ehl|Cw4j4X52^n7ZUZ5i2wiq

literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/reflect/Label.class b/tests/test_data/std/jdk/internal/reflect/Label.class
new file mode 100644
index 0000000000000000000000000000000000000000..606e13543c9a1c23fc6f8ec788fe91bcf424c47b
GIT binary patch
literal 1500
zcma)6U31$+6g?X|Q7o&eX_LB?q@<9vwo_t0O1~5giQBXeN?K5HDQ|0g6DyVFj3hJg
zJ9y$3@XSm}CS-=;p-=oIh5^oQ-6Sxf!-K8eyL-<)_w3pI?a!Zo0Z_-6Hb#)KkaaMM
zF@eIi{90B+8EsV`w6;|{6&PCzq9CmaWJ=|xg>iwiX44=I!s>Dy%Wu6PNo`oj<dBDB
z;go|3oEEsS-FaFKqEy9^46Cu)3<+5EWJ`qt){acuU6rt=cZ8>*Tnn!W%>8%r+(Vt(
zh&KB+3OK8&PYP5^-iayoP$tQ05US-QQN32EV%PT@<z^n|P_%H~!RxpnF!4_kY*%(V
z0#ii&mn3faE1f&-U<MZj#sfAe(|#;)u2eqOOJf*!^O(gY3vW4i8*>6@jw-#}LOHrJ
z*-+n5Z^}&kSzLB-1to!OWWtj#v5y^&n`8eK2Mf5W`6fL95;#fp6GX7Fh^mEm9lVG4
z1+M(hJb~PnN<9^ArCmeT*Cehv_z>5%7*UeOEA@teFbg*w+%gO1xVfOqx(=4`5s_3c
zNd0a<X4|7B-!C^c*2fM$!Lopzq_X|=j@r?Mgh{MBxP!Yalc?0!tCXk2vm}%sY(+91
z#7f}iu|v>?S~^)1W5gpbxiyz)^?rv4r@bIj8-rd;#g8N{!$b4>Z5cLY9O(Hlm`%F@
z4Ltn{e2v)(B06cTJ$NC^SbuYq{MoY6MBwr(@{jQoIAwZXmpjAyw%;GbZKcgkxlBKc
z+FSzp4V9$pw7ZH)&}l@Gij4;pr@6!XL!0IK003-I-&uZFIUB(}WH{!N!2kP<te81a
zsO&*h4q!dmL+&ToKbqYQ{!efRc-C3mAkJ;9apo|aIrtPFzu-li9OCu(T#PbOtUQB#
zfWni7>6xkQ9?tAzY6OpuVD<Y1Ec3pt7|3fc(hebu+We+WQ9ID=E^5meIz{ayQW97{
zY~_F}y7ZbZy^l8pyoG(dDeygRaWF6ND+=pZpP{^qcWN^ne9-ysdR7PcyD^pB#qHsw
zwu_Y?{(7$2W}rp5$hLsHd>B?SPZ1X>p39Y0a&M5c7NtTy^SFc!!*LPk@qnW&bIN##
r&rAnv!~Q<!ejd;tur18~jvCAO42|FszTj6kRzQ;@+l=yfjPbt#6H-j&

literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/reflect/Label.java b/tests/test_data/std/jdk/internal/reflect/Label.java
new file mode 100644
index 00000000..eb531530
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/reflect/Label.java
@@ -0,0 +1,76 @@
+/*
+ * Copyright (c) 2001, 2011, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package jdk.internal.reflect;
+
+import java.util.List;
+import java.util.ArrayList;
+
+/** Allows forward references in bytecode streams emitted by
+    ClassFileAssembler. Assumes that the start of the method body is
+    the first byte in the assembler's buffer. May be used at more than
+    one branch site. */
+
+class Label {
+    static class PatchInfo {
+        PatchInfo(ClassFileAssembler asm,
+                  short instrBCI,
+                  short patchBCI,
+                  int stackDepth)
+        {
+            this.asm = asm;
+            this.instrBCI   = instrBCI;
+            this.patchBCI   = patchBCI;
+            this.stackDepth = stackDepth;
+        }
+        // This won't work for more than one assembler anyway, so this is
+        // unnecessary
+        final ClassFileAssembler asm;
+        final short instrBCI;
+        final short patchBCI;
+        final int   stackDepth;
+    }
+    private final List<PatchInfo> patches = new ArrayList<>();
+
+    public Label() {
+    }
+
+    void add(ClassFileAssembler asm,
+             short instrBCI,
+             short patchBCI,
+             int stackDepth)
+    {
+        patches.add(new PatchInfo(asm, instrBCI, patchBCI, stackDepth));
+    }
+
+    public void bind() {
+        for (PatchInfo patch : patches){
+            short curBCI = patch.asm.getLength();
+            short offset = (short) (curBCI - patch.instrBCI);
+            patch.asm.emitShort(patch.patchBCI, offset);
+            patch.asm.setStack(patch.stackDepth);
+        }
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/reflect/MagicAccessorImpl.class b/tests/test_data/std/jdk/internal/reflect/MagicAccessorImpl.class
new file mode 100644
index 0000000000000000000000000000000000000000..5835e608f039895eedbb0e02a1f2fc0acc17da27
GIT binary patch
literal 318
zcma)1u}%U(5PfqT93Cjdf||;J1^WRQ6GLJ`azY`Y-&<DPbJ-(%hyP_|V!;RaQHEKy
zvvHDnZ|2QpGVk;2;|O4eeu@Z<1aTKlv<Uq|zDi-G+lpmgXjKzhH^!Ozme3fD*9qE$
zt77vajH|VG(h9GiEH8=&xi#ueDP2{ipYQgT5YNhuCiF7n^y09~wO`5HvT~V~O4_yb
zCiK5zTtAzNFv|XSeo9Cm%Y#??-h`WjKMzcT84QuI#}LHHE}74`63pMq^*iW|g$OBQ
U7y}b@7`s0U%;($@E*K;9PX8ZDO8@`>

literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/reflect/MagicAccessorImpl.java b/tests/test_data/std/jdk/internal/reflect/MagicAccessorImpl.java
new file mode 100644
index 00000000..e464e3b6
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/reflect/MagicAccessorImpl.java
@@ -0,0 +1,47 @@
+/*
+ * Copyright (c) 2001, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package jdk.internal.reflect;
+
+/** <P> MagicAccessorImpl (named for parity with FieldAccessorImpl and
+    others, not because it actually implements an interface) is a
+    marker class in the hierarchy. All subclasses of this class are
+    "magically" granted access by the VM to otherwise inaccessible
+    fields and methods of other classes. It is used to hold the code
+    for dynamically-generated FieldAccessorImpl and MethodAccessorImpl
+    subclasses. (Use of the word "unsafe" was avoided in this class's
+    name to avoid confusion with {@link jdk.internal.misc.Unsafe}.) </P>
+
+    <P> The bug fix for 4486457 also necessitated disabling
+    verification for this class and all subclasses, as opposed to just
+    SerializationConstructorAccessorImpl and subclasses, to avoid
+    having to indicate to the VM which of these dynamically-generated
+    stub classes were known to be able to pass the verifier. </P>
+
+    <P> Do not change the name of this class without also changing the
+    VM's code. </P> */
+
+class MagicAccessorImpl {
+}
diff --git a/tests/test_data/std/jdk/internal/reflect/MethodAccessor.class b/tests/test_data/std/jdk/internal/reflect/MethodAccessor.class
new file mode 100644
index 0000000000000000000000000000000000000000..52d123fe300dddf2df854e89aaf60e68f482fb77
GIT binary patch
literal 518
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/reflect/MethodAccessor.java b/tests/test_data/std/jdk/internal/reflect/MethodAccessor.java
new file mode 100644
index 00000000..27dfe445
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/reflect/MethodAccessor.java
@@ -0,0 +1,43 @@
+/*
+ * Copyright (c) 2001, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package jdk.internal.reflect;
+
+import java.lang.reflect.InvocationTargetException;
+
+/** This interface provides the declaration for
+    java.lang.reflect.Method.invoke(). Each Method object is
+    configured with a (possibly dynamically-generated) class which
+    implements this interface.
+*/
+
+public interface MethodAccessor {
+    /** Matches specification in {@link java.lang.reflect.Method} */
+    public Object invoke(Object obj, Object[] args)
+        throws IllegalArgumentException, InvocationTargetException;
+
+    public Object invoke(Object obj, Object[] args, Class<?> caller)
+            throws IllegalArgumentException, InvocationTargetException;
+}
diff --git a/tests/test_data/std/jdk/internal/reflect/MethodAccessorImpl.class b/tests/test_data/std/jdk/internal/reflect/MethodAccessorImpl.class
new file mode 100644
index 0000000000000000000000000000000000000000..c202cf2e9744b1d6afcb5eb348d5f6dac9806a08
GIT binary patch
literal 1020
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/reflect/MethodAccessorImpl.java b/tests/test_data/std/jdk/internal/reflect/MethodAccessorImpl.java
new file mode 100644
index 00000000..1ef40d20
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/reflect/MethodAccessorImpl.java
@@ -0,0 +1,53 @@
+/*
+ * Copyright (c) 2001, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package jdk.internal.reflect;
+
+import java.lang.reflect.InvocationTargetException;
+
+/** <P> Package-private implementation of the MethodAccessor interface
+    which has access to all classes and all fields, regardless of
+    language restrictions. See MagicAccessor. </P>
+
+    <P> This class is known to the VM; do not change its name without
+    also changing the VM's code. </P>
+
+    <P> NOTE: ALL methods of subclasses are skipped during security
+    walks up the stack. The assumption is that the only such methods
+    that will persistently show up on the stack are the implementing
+    methods for java.lang.reflect.Method.invoke(). </P>
+*/
+
+abstract class MethodAccessorImpl extends MagicAccessorImpl
+    implements MethodAccessor {
+    /** Matches specification in {@link java.lang.reflect.Method} */
+    public abstract Object invoke(Object obj, Object[] args)
+        throws IllegalArgumentException, InvocationTargetException;
+
+    public Object invoke(Object obj, Object[] args, Class<?> caller)
+            throws IllegalArgumentException, InvocationTargetException {
+        return invoke(obj, args);
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/reflect/MethodHandleAccessorFactory$LazyStaticHolder.class b/tests/test_data/std/jdk/internal/reflect/MethodHandleAccessorFactory$LazyStaticHolder.class
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literal 0
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diff --git a/tests/test_data/std/jdk/internal/reflect/MethodHandleAccessorFactory.class b/tests/test_data/std/jdk/internal/reflect/MethodHandleAccessorFactory.class
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diff --git a/tests/test_data/std/jdk/internal/reflect/MethodHandleAccessorFactory.java b/tests/test_data/std/jdk/internal/reflect/MethodHandleAccessorFactory.java
new file mode 100644
index 00000000..3a367272
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/reflect/MethodHandleAccessorFactory.java
@@ -0,0 +1,417 @@
+/*
+ * Copyright (c) 2021, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package jdk.internal.reflect;
+
+import java.lang.invoke.MethodHandle;
+import java.lang.invoke.MethodHandles;
+import java.lang.invoke.MethodType;
+import java.lang.reflect.Constructor;
+import java.lang.reflect.Executable;
+import java.lang.reflect.Field;
+import java.lang.reflect.Method;
+import java.lang.reflect.Modifier;
+
+import jdk.internal.access.JavaLangInvokeAccess;
+import jdk.internal.access.SharedSecrets;
+import jdk.internal.misc.Unsafe;
+import jdk.internal.misc.VM;
+
+import static java.lang.invoke.MethodType.genericMethodType;
+import static java.lang.invoke.MethodType.methodType;
+import static jdk.internal.reflect.MethodHandleAccessorFactory.LazyStaticHolder.*;
+
+final class MethodHandleAccessorFactory {
+    /**
+     * Creates a MethodAccessor for the given reflected method.
+     *
+     * If the given method is called before the java.lang.invoke initialization
+     * or the given method is a native method, it will use the native VM reflection
+     * support.
+     *
+     * If the given method is a caller-sensitive method and the corresponding
+     * caller-sensitive adapter with the caller class parameter is present,
+     * it will use the method handle of the caller-sensitive adapter.
+     *
+     * Otherwise, it will use the direct method handle of the given method.
+     *
+     * @see CallerSensitive
+     * @see CallerSensitiveAdapter
+     */
+    static MethodAccessorImpl newMethodAccessor(Method method, boolean callerSensitive) {
+        if (useNativeAccessor(method)) {
+            return DirectMethodHandleAccessor.nativeAccessor(method, callerSensitive);
+        }
+
+        // ExceptionInInitializerError may be thrown during class initialization
+        // Ensure class initialized outside the invocation of method handle
+        // so that EIIE is propagated (not wrapped with ITE)
+        ensureClassInitialized(method.getDeclaringClass());
+
+        try {
+            if (callerSensitive) {
+                var dmh = findCallerSensitiveAdapter(method);
+                if (dmh != null) {
+                    return DirectMethodHandleAccessor.callerSensitiveAdapter(method, dmh);
+                }
+            }
+            var dmh = getDirectMethod(method, callerSensitive);
+            return DirectMethodHandleAccessor.methodAccessor(method, dmh);
+        } catch (IllegalAccessException e) {
+            throw new InternalError(e);
+        }
+    }
+
+    /**
+     * Creates a ConstructorAccessor for the given reflected constructor.
+     *
+     * If a given constructor is called before the java.lang.invoke initialization,
+     * it will use the native VM reflection support.
+     *
+     * Otherwise, it will use the direct method handle of the given constructor.
+     */
+    static ConstructorAccessorImpl newConstructorAccessor(Constructor<?> ctor) {
+        if (useNativeAccessor(ctor)) {
+            return DirectConstructorHandleAccessor.nativeAccessor(ctor);
+        }
+
+        // ExceptionInInitializerError may be thrown during class initialization
+        // Ensure class initialized outside the invocation of method handle
+        // so that EIIE is propagated (not wrapped with ITE)
+        ensureClassInitialized(ctor.getDeclaringClass());
+        try {
+            MethodHandle target = makeConstructorHandle(JLIA.unreflectConstructor(ctor));
+            return DirectConstructorHandleAccessor.constructorAccessor(ctor, target);
+        } catch (IllegalAccessException e) {
+            throw new InternalError(e);
+        }
+    }
+
+    /**
+     * Creates a ConstructorAccessor that is capable of creating instances
+     * of the given class and instantiated by the given constructor.
+     *
+     * @param decl the class to instantiate
+     * @param ctor the constructor to call
+     * @return an accessible constructor
+     */
+    static ConstructorAccessorImpl newSerializableConstructorAccessor(Class<?> decl, Constructor<?> ctor) {
+        if (!constructorInSuperclass(decl, ctor)) {
+            throw new UnsupportedOperationException(ctor + " not a superclass of " + decl.getName());
+        }
+
+        // ExceptionInInitializerError may be thrown during class initialization
+        // Ensure class initialized outside the invocation of method handle
+        // so that EIIE is propagated (not wrapped with ITE)
+        ensureClassInitialized(decl);
+        try {
+            MethodHandle target = makeConstructorHandle(JLIA.serializableConstructor(decl, ctor));
+            return DirectConstructorHandleAccessor.constructorAccessor(ctor, target);
+        } catch (IllegalAccessException e) {
+            throw new InternalError(e);
+        }
+    }
+
+    private static boolean constructorInSuperclass(Class<?> decl, Constructor<?> ctor) {
+        if (decl == ctor.getDeclaringClass())
+            return true;
+
+        Class<?> cl = decl;
+        while ((cl = cl.getSuperclass()) != null) {
+            if (cl == ctor.getDeclaringClass()) {
+                return true;
+            }
+        }
+        return false;
+    }
+
+    private static MethodHandle makeConstructorHandle(MethodHandle ctor) {
+        int paramCount = ctor.type().parameterCount();
+        MethodHandle target = ctor.asFixedArity();
+        MethodType mtype = specializedMethodTypeForConstructor(paramCount);
+        if (paramCount > SPECIALIZED_PARAM_COUNT) {
+            // spread the parameters only for the non-specialized case
+            target = target.asSpreader(Object[].class, paramCount);
+        }
+        return target.asType(mtype);
+    }
+
+    /**
+     * Creates a FieldAccessor for the given reflected field.
+     *
+     * Limitation: Field access via core reflection is only supported after
+     * java.lang.invoke completes initialization.
+     * java.lang.invoke initialization starts soon after System::initPhase1
+     * and method handles are ready for use when initPhase2 begins.
+     * During early VM startup (initPhase1), fields can be accessed directly
+     * from the VM or through JNI.
+     */
+    static FieldAccessorImpl newFieldAccessor(Field field, boolean isReadOnly) {
+        if (!VM.isJavaLangInvokeInited()) {
+            throw new InternalError(field.getDeclaringClass().getName() + "::" + field.getName() +
+                    " cannot be accessed reflectively before java.lang.invoke is initialized");
+        }
+
+        // ExceptionInInitializerError may be thrown during class initialization
+        // Ensure class initialized outside the invocation of method handle
+        // so that EIIE is propagated (not wrapped with ITE)
+        ensureClassInitialized(field.getDeclaringClass());
+
+        try {
+            // the declaring class of the field has been initialized
+            var getter = JLIA.unreflectField(field, false);
+            var setter = isReadOnly ? null : JLIA.unreflectField(field, true);
+            Class<?> type = field.getType();
+            if (type == Boolean.TYPE) {
+                return MethodHandleBooleanFieldAccessorImpl.fieldAccessor(field, getter, setter, isReadOnly);
+            } else if (type == Byte.TYPE) {
+                return MethodHandleByteFieldAccessorImpl.fieldAccessor(field, getter, setter, isReadOnly);
+            } else if (type == Short.TYPE) {
+                return MethodHandleShortFieldAccessorImpl.fieldAccessor(field, getter, setter, isReadOnly);
+            } else if (type == Character.TYPE) {
+                return MethodHandleCharacterFieldAccessorImpl.fieldAccessor(field, getter, setter, isReadOnly);
+            } else if (type == Integer.TYPE) {
+                return MethodHandleIntegerFieldAccessorImpl.fieldAccessor(field, getter, setter, isReadOnly);
+            } else if (type == Long.TYPE) {
+                return MethodHandleLongFieldAccessorImpl.fieldAccessor(field, getter, setter, isReadOnly);
+            } else if (type == Float.TYPE) {
+                return MethodHandleFloatFieldAccessorImpl.fieldAccessor(field, getter, setter, isReadOnly);
+            } else if (type == Double.TYPE) {
+                return MethodHandleDoubleFieldAccessorImpl.fieldAccessor(field, getter, setter, isReadOnly);
+            } else {
+                return MethodHandleObjectFieldAccessorImpl.fieldAccessor(field, getter, setter, isReadOnly);
+            }
+        } catch (IllegalAccessException e) {
+            throw new InternalError(e);
+        }
+    }
+
+    private static MethodHandle getDirectMethod(Method method, boolean callerSensitive) throws IllegalAccessException {
+        var mtype = methodType(method.getReturnType(), method.getParameterTypes());
+        var isStatic = Modifier.isStatic(method.getModifiers());
+        var dmh = isStatic ? JLIA.findStatic(method.getDeclaringClass(), method.getName(), mtype)
+                                        : JLIA.findVirtual(method.getDeclaringClass(), method.getName(), mtype);
+        if (callerSensitive) {
+            // the reflectiveInvoker for caller-sensitive method expects the same signature
+            // as Method::invoke i.e. (Object, Object[])Object
+            return makeTarget(dmh, isStatic, false);
+        }
+        return makeSpecializedTarget(dmh, isStatic, false);
+    }
+
+    /**
+     * Finds the method handle of a caller-sensitive adapter for the given
+     * caller-sensitive method.  It has the same name as the given method
+     * with a trailing caller class parameter.
+     *
+     * @see CallerSensitiveAdapter
+     */
+    private static MethodHandle findCallerSensitiveAdapter(Method method) throws IllegalAccessException {
+        String name = method.getName();
+        // append a Class parameter
+        MethodType mtype = methodType(method.getReturnType(), method.getParameterTypes())
+                                .appendParameterTypes(Class.class);
+        boolean isStatic = Modifier.isStatic(method.getModifiers());
+
+        MethodHandle dmh = isStatic ? JLIA.findStatic(method.getDeclaringClass(), name, mtype)
+                                    : JLIA.findVirtual(method.getDeclaringClass(), name, mtype);
+        return dmh != null ? makeSpecializedTarget(dmh, isStatic, true) : null;
+    }
+
+    /**
+     * Transform the given dmh to a specialized target method handle.
+     *
+     * If {@code hasCallerParameter} parameter is true, transform the method handle
+     * of this method type: {@code (Object, Object[], Class)Object} for the default
+     * case.
+     *
+     * If {@code hasCallerParameter} parameter is false, transform the method handle
+     * of this method type: {@code (Object, Object[])Object} for the default case.
+     *
+     * If the number of formal arguments is small, use a method type specialized
+     * the number of formal arguments is 0, 1, and 2, for example, the method type
+     * of a static method with one argument can be: {@code (Object)Object}
+     *
+     * If it's a static method, there is no leading Object parameter.
+     *
+     * @apiNote
+     * This implementation avoids using MethodHandles::catchException to help
+     * cold startup performance since this combination is very costly to setup.
+     *
+     * @param dmh DirectMethodHandle
+     * @param isStatic whether given dmh represents static method or not
+     * @param hasCallerParameter whether given dmh represents a method with an
+     *                         additional caller Class parameter
+     * @return transformed dmh to be used as a target in direct method accessors
+     */
+    static MethodHandle makeSpecializedTarget(MethodHandle dmh, boolean isStatic, boolean hasCallerParameter) {
+        MethodHandle target = dmh.asFixedArity();
+
+        // number of formal arguments to the original method (not the adapter)
+        // If it is a non-static method, it has a leading `this` argument.
+        // Also do not count the caller class argument
+        int paramCount = dmh.type().parameterCount() - (isStatic ? 0 : 1) - (hasCallerParameter ? 1 : 0);
+        MethodType mtype = specializedMethodType(isStatic, hasCallerParameter, paramCount);
+        if (paramCount > SPECIALIZED_PARAM_COUNT) {
+            int spreadArgPos = isStatic ? 0 : 1;
+            target = target.asSpreader(spreadArgPos, Object[].class, paramCount);
+        }
+        if (isStatic) {
+            // add leading 'this' parameter to static method which is then ignored
+            target = MethodHandles.dropArguments(target, 0, Object.class);
+        }
+        return target.asType(mtype);
+    }
+
+    // specialize for number of formal arguments <= 3 to avoid spreader
+    static final int SPECIALIZED_PARAM_COUNT = 3;
+    static MethodType specializedMethodType(boolean isStatic, boolean hasCallerParameter, int paramCount) {
+        return switch (paramCount) {
+            case 0 -> hasCallerParameter ? methodType(Object.class, Object.class, Class.class)
+                                         : genericMethodType(1);
+            case 1 -> hasCallerParameter ? methodType(Object.class, Object.class, Object.class, Class.class)
+                                         : genericMethodType(2);
+            case 2 -> hasCallerParameter ? methodType(Object.class, Object.class, Object.class, Object.class, Class.class)
+                                         : genericMethodType(3);
+            case 3 -> hasCallerParameter ? methodType(Object.class, Object.class, Object.class, Object.class, Object.class, Class.class)
+                                         : genericMethodType(4);
+            default -> hasCallerParameter ? methodType(Object.class, Object.class, Object[].class, Class.class)
+                                          : genericMethodType(1, true);
+        };
+    }
+
+    static MethodType specializedMethodTypeForConstructor(int paramCount) {
+        return switch (paramCount) {
+            case 0 ->  genericMethodType(0);
+            case 1 ->  genericMethodType(1);
+            case 2 ->  genericMethodType(2);
+            case 3 ->  genericMethodType(3);
+            default -> genericMethodType(0, true);
+        };
+    }
+
+    /**
+     * Transforms the given dmh into a target method handle with the method type
+     * {@code (Object, Object[])Object} or {@code (Object, Class, Object[])Object}
+     */
+    static MethodHandle makeTarget(MethodHandle dmh, boolean isStatic, boolean hasCallerParameter) {
+        MethodType mtype = hasCallerParameter
+                                ? methodType(Object.class, Object.class, Object[].class, Class.class)
+                                : genericMethodType(1, true);
+        // number of formal arguments
+        int paramCount = dmh.type().parameterCount() - (isStatic ? 0 : 1) - (hasCallerParameter ? 1 : 0);
+        int spreadArgPos = isStatic ? 0 : 1;
+        MethodHandle target = dmh.asFixedArity().asSpreader(spreadArgPos, Object[].class, paramCount);
+        if (isStatic) {
+            // add leading 'this' parameter to static method which is then ignored
+            target = MethodHandles.dropArguments(target, 0, Object.class);
+        }
+        return target.asType(mtype);
+    }
+
+    /**
+     * Ensures the given class is initialized.  If this is called from <clinit>,
+     * this method returns but defc's class initialization is not completed.
+     */
+    static void ensureClassInitialized(Class<?> defc) {
+        if (UNSAFE.shouldBeInitialized(defc)) {
+            UNSAFE.ensureClassInitialized(defc);
+        }
+    }
+
+    /*
+     * Returns true if NativeAccessor should be used.
+     *
+     * Native accessor, i.e. VM reflection implementation, is used if one of
+     * the following conditions is met:
+     * 1. during VM early startup before method handle support is fully initialized
+     * 2. a Java native method
+     * 3. -Djdk.reflect.useNativeAccessorOnly=true is set
+     * 4. the member takes a variable number of arguments and the last parameter
+     *    is not an array (see details below)
+     * 5. the member's method type has an arity >= 255
+     *
+     * Otherwise, direct invocation of method handles is used.
+     */
+    private static boolean useNativeAccessor(Executable member) {
+        if (!VM.isJavaLangInvokeInited())
+            return true;
+
+        if (Modifier.isNative(member.getModifiers()))
+            return true;
+
+        if (ReflectionFactory.useNativeAccessorOnly())  // for testing only
+            return true;
+
+        // MethodHandle::withVarargs on a member with varargs modifier bit set
+        // verifies that the last parameter of the member must be an array type.
+        // The JVMS does not require the last parameter descriptor of the method descriptor
+        // is an array type if the ACC_VARARGS flag is set in the access_flags item.
+        // Hence the reflection implementation does not check the last parameter type
+        // if ACC_VARARGS flag is set.  Workaround this by invoking through
+        // the native accessor.
+        int paramCount = member.getParameterCount();
+        if (member.isVarArgs() &&
+                (paramCount == 0 || !(member.getParameterTypes()[paramCount-1].isArray()))) {
+            return true;
+        }
+        // A method handle cannot be created if its type has an arity >= 255
+        // as the method handle's invoke method consumes an extra argument
+        // of the method handle itself. Fall back to use the native implementation.
+        if (slotCount(member) >= MAX_JVM_ARITY) {
+            return true;
+        }
+        return false;
+    }
+
+    private static final int MAX_JVM_ARITY = 255;  // this is mandated by the JVM spec.
+    /*
+     * Return number of slots of the given member.
+     * - long/double args counts for two argument slots
+     * - A non-static method consumes an extra argument for the object on which
+     *   the method is called.
+     * - A constructor consumes an extra argument for the object which is being constructed.
+     */
+    private static int slotCount(Executable member) {
+        int slots = 0;
+        Class<?>[] ptypes = member.getParameterTypes();
+        for (Class<?> ptype : ptypes) {
+            if (ptype == double.class || ptype == long.class) {
+                slots++;
+            }
+        }
+        return ptypes.length + slots +
+                (Modifier.isStatic(member.getModifiers()) ? 0 : 1);
+    }
+
+    /*
+     * Delay initializing these static fields until java.lang.invoke is fully initialized.
+     */
+    static class LazyStaticHolder {
+        static final JavaLangInvokeAccess JLIA = SharedSecrets.getJavaLangInvokeAccess();
+    }
+
+    private static final Unsafe UNSAFE = Unsafe.getUnsafe();
+}
diff --git a/tests/test_data/std/jdk/internal/reflect/MethodHandleBooleanFieldAccessorImpl.class b/tests/test_data/std/jdk/internal/reflect/MethodHandleBooleanFieldAccessorImpl.class
new file mode 100644
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ClzDdm

literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/reflect/MethodHandleBooleanFieldAccessorImpl.java b/tests/test_data/std/jdk/internal/reflect/MethodHandleBooleanFieldAccessorImpl.java
new file mode 100644
index 00000000..2e060926
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/reflect/MethodHandleBooleanFieldAccessorImpl.java
@@ -0,0 +1,185 @@
+/*
+ * Copyright (c) 2021, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package jdk.internal.reflect;
+
+import java.lang.invoke.MethodHandle;
+import java.lang.invoke.MethodType;
+import java.lang.reflect.Field;
+import java.lang.reflect.Modifier;
+
+class MethodHandleBooleanFieldAccessorImpl extends MethodHandleFieldAccessorImpl {
+    static FieldAccessorImpl fieldAccessor(Field field, MethodHandle getter, MethodHandle setter, boolean isReadOnly) {
+        boolean isStatic = Modifier.isStatic(field.getModifiers());
+        if (isStatic) {
+            getter = getter.asType(MethodType.methodType(boolean.class));
+            if (setter != null) {
+                setter = setter.asType(MethodType.methodType(void.class, boolean.class));
+            }
+        } else {
+            getter = getter.asType(MethodType.methodType(boolean.class, Object.class));
+            if (setter != null) {
+                setter = setter.asType(MethodType.methodType(void.class, Object.class, boolean.class));
+            }
+        }
+        return new MethodHandleBooleanFieldAccessorImpl(field, getter, setter, isReadOnly, isStatic);
+    }
+
+    MethodHandleBooleanFieldAccessorImpl(Field field, MethodHandle getter, MethodHandle setter, boolean isReadOnly, boolean isStatic) {
+        super(field, getter, setter, isReadOnly, isStatic);
+    }
+
+    public Object get(Object obj) throws IllegalArgumentException {
+        return Boolean.valueOf(getBoolean(obj));
+    }
+
+    public boolean getBoolean(Object obj) throws IllegalArgumentException {
+        try {
+            if (isStatic()) {
+                return (boolean) getter.invokeExact();
+            } else {
+                return (boolean) getter.invokeExact(obj);
+            }
+        } catch (IllegalArgumentException|NullPointerException e) {
+            throw e;
+        } catch (ClassCastException e) {
+            throw newGetIllegalArgumentException(obj);
+        } catch (Throwable e) {
+            throw new InternalError(e);
+        }
+    }
+
+    public byte getByte(Object obj) throws IllegalArgumentException {
+        throw newGetByteIllegalArgumentException();
+    }
+
+    public char getChar(Object obj) throws IllegalArgumentException {
+        throw newGetCharIllegalArgumentException();
+    }
+
+    public short getShort(Object obj) throws IllegalArgumentException {
+        throw newGetShortIllegalArgumentException();
+    }
+
+    public int getInt(Object obj) throws IllegalArgumentException {
+        throw newGetIntIllegalArgumentException();
+    }
+
+    public long getLong(Object obj) throws IllegalArgumentException {
+        throw newGetLongIllegalArgumentException();
+    }
+
+    public float getFloat(Object obj) throws IllegalArgumentException {
+        throw newGetFloatIllegalArgumentException();
+    }
+
+    public double getDouble(Object obj) throws IllegalArgumentException {
+        throw newGetDoubleIllegalArgumentException();
+    }
+
+    public void set(Object obj, Object value)
+            throws IllegalArgumentException, IllegalAccessException
+    {
+        ensureObj(obj);
+        if (isReadOnly()) {
+            throwFinalFieldIllegalAccessException(value);
+        }
+
+        if (value == null) {
+            throwSetIllegalArgumentException(value);
+        }
+
+        if (value instanceof Boolean b) {
+            setBoolean(obj, b.booleanValue());
+        } else {
+            throwSetIllegalArgumentException(value);
+        }
+    }
+
+    public void setBoolean(Object obj, boolean z)
+        throws IllegalArgumentException, IllegalAccessException
+    {
+        if (isReadOnly()) {
+            ensureObj(obj);     // throw NPE if obj is null on instance field
+            throwFinalFieldIllegalAccessException(z);
+        }
+        try {
+            if (isStatic()) {
+                setter.invokeExact(z);
+            } else {
+                setter.invokeExact(obj, z);
+            }
+        } catch (IllegalArgumentException|NullPointerException e) {
+            throw e;
+        } catch (ClassCastException e) {
+            // receiver is of invalid type
+            throw newSetIllegalArgumentException(obj);
+        } catch (Throwable e) {
+            throw new InternalError(e);
+        }
+    }
+
+    public void setByte(Object obj, byte b)
+        throws IllegalArgumentException, IllegalAccessException
+    {
+        throwSetIllegalArgumentException(b);
+    }
+
+    public void setChar(Object obj, char c)
+        throws IllegalArgumentException, IllegalAccessException
+    {
+        throwSetIllegalArgumentException(c);
+    }
+
+    public void setShort(Object obj, short s)
+        throws IllegalArgumentException, IllegalAccessException
+    {
+        throwSetIllegalArgumentException(s);
+    }
+
+    public void setInt(Object obj, int i)
+        throws IllegalArgumentException, IllegalAccessException
+    {
+        throwSetIllegalArgumentException(i);
+    }
+
+    public void setLong(Object obj, long l)
+        throws IllegalArgumentException, IllegalAccessException
+    {
+        throwSetIllegalArgumentException(l);
+    }
+
+    public void setFloat(Object obj, float f)
+        throws IllegalArgumentException, IllegalAccessException
+    {
+        throwSetIllegalArgumentException(f);
+    }
+
+    public void setDouble(Object obj, double d)
+        throws IllegalArgumentException, IllegalAccessException
+    {
+        throwSetIllegalArgumentException(d);
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/reflect/MethodHandleByteFieldAccessorImpl.class b/tests/test_data/std/jdk/internal/reflect/MethodHandleByteFieldAccessorImpl.class
new file mode 100644
index 0000000000000000000000000000000000000000..71281401d61cf5b34325aba29cec68e5aef6fc3d
GIT binary patch
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rT&jrh2mG-F;ZOK;9w8S)O9r1RMz~CbnTiO1!Cy-d{>Hjj;qU(i5b_r7

literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/reflect/MethodHandleByteFieldAccessorImpl.java b/tests/test_data/std/jdk/internal/reflect/MethodHandleByteFieldAccessorImpl.java
new file mode 100644
index 00000000..b56fbbcb
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/reflect/MethodHandleByteFieldAccessorImpl.java
@@ -0,0 +1,185 @@
+/*
+ * Copyright (c) 2021, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package jdk.internal.reflect;
+
+import java.lang.invoke.MethodHandle;
+import java.lang.invoke.MethodType;
+import java.lang.reflect.Field;
+import java.lang.reflect.Modifier;
+
+class MethodHandleByteFieldAccessorImpl extends MethodHandleFieldAccessorImpl {
+    static FieldAccessorImpl fieldAccessor(Field field, MethodHandle getter, MethodHandle setter, boolean isReadOnly) {
+        boolean isStatic = Modifier.isStatic(field.getModifiers());
+        if (isStatic) {
+            getter = getter.asType(MethodType.methodType(byte.class));
+            if (setter != null) {
+                setter = setter.asType(MethodType.methodType(void.class, byte.class));
+            }
+        } else {
+            getter = getter.asType(MethodType.methodType(byte.class, Object.class));
+            if (setter != null) {
+                setter = setter.asType(MethodType.methodType(void.class, Object.class, byte.class));
+            }
+        }
+        return new MethodHandleByteFieldAccessorImpl(field, getter, setter, isReadOnly, isStatic);
+    }
+
+    MethodHandleByteFieldAccessorImpl(Field field, MethodHandle getter, MethodHandle setter, boolean isReadOnly, boolean isStatic) {
+        super(field, getter, setter, isReadOnly, isStatic);
+    }
+
+    public Object get(Object obj) throws IllegalArgumentException {
+        return Byte.valueOf(getByte(obj));
+    }
+
+    public boolean getBoolean(Object obj) throws IllegalArgumentException {
+        throw newGetBooleanIllegalArgumentException();
+    }
+
+    public byte getByte(Object obj) throws IllegalArgumentException {
+        try {
+            if (isStatic()) {
+                return (byte) getter.invokeExact();
+            } else {
+                return (byte) getter.invokeExact(obj);
+            }
+        } catch (IllegalArgumentException|NullPointerException e) {
+            throw e;
+        } catch (ClassCastException e) {
+            throw newGetIllegalArgumentException(obj);
+        } catch (Throwable e) {
+            throw new InternalError(e);
+        }
+    }
+
+    public char getChar(Object obj) throws IllegalArgumentException {
+        throw newGetCharIllegalArgumentException();
+    }
+
+    public short getShort(Object obj) throws IllegalArgumentException {
+        return getByte(obj);
+    }
+
+    public int getInt(Object obj) throws IllegalArgumentException {
+        return getByte(obj);
+    }
+
+    public long getLong(Object obj) throws IllegalArgumentException {
+        return getByte(obj);
+    }
+
+    public float getFloat(Object obj) throws IllegalArgumentException {
+        return getByte(obj);
+    }
+
+    public double getDouble(Object obj) throws IllegalArgumentException {
+        return getByte(obj);
+    }
+
+    public void set(Object obj, Object value)
+            throws IllegalArgumentException, IllegalAccessException
+    {
+        ensureObj(obj);
+        if (isReadOnly()) {
+            throwFinalFieldIllegalAccessException(value);
+        }
+
+        if (value == null) {
+            throwSetIllegalArgumentException(value);
+        }
+
+        if (value instanceof Byte b) {
+            setByte(obj, b.byteValue());
+        } else {
+            throwSetIllegalArgumentException(value);
+        }
+    }
+
+    public void setBoolean(Object obj, boolean z)
+        throws IllegalArgumentException, IllegalAccessException
+    {
+        throwSetIllegalArgumentException(z);
+    }
+
+    public void setByte(Object obj, byte b)
+        throws IllegalArgumentException, IllegalAccessException
+    {
+        if (isReadOnly()) {
+            ensureObj(obj);     // throw NPE if obj is null on instance field
+            throwFinalFieldIllegalAccessException(b);
+        }
+        try {
+            if (isStatic()) {
+                setter.invokeExact(b);
+            } else {
+                setter.invokeExact(obj, b);
+            }
+        } catch (IllegalArgumentException|NullPointerException e) {
+            throw e;
+        } catch (ClassCastException e) {
+            // receiver is of invalid type
+            throw newSetIllegalArgumentException(obj);
+        } catch (Throwable e) {
+            throw new InternalError(e);
+        }
+    }
+
+    public void setChar(Object obj, char c)
+        throws IllegalArgumentException, IllegalAccessException
+    {
+        throwSetIllegalArgumentException(c);
+    }
+
+    public void setShort(Object obj, short s)
+        throws IllegalArgumentException, IllegalAccessException
+    {
+        throwSetIllegalArgumentException(s);
+    }
+
+    public void setInt(Object obj, int i)
+        throws IllegalArgumentException, IllegalAccessException
+    {
+        throwSetIllegalArgumentException(i);
+    }
+
+    public void setLong(Object obj, long l)
+        throws IllegalArgumentException, IllegalAccessException
+    {
+        throwSetIllegalArgumentException(l);
+    }
+
+    public void setFloat(Object obj, float f)
+        throws IllegalArgumentException, IllegalAccessException
+    {
+        throwSetIllegalArgumentException(f);
+    }
+
+    public void setDouble(Object obj, double d)
+        throws IllegalArgumentException, IllegalAccessException
+    {
+        throwSetIllegalArgumentException(d);
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/reflect/MethodHandleCharacterFieldAccessorImpl.class b/tests/test_data/std/jdk/internal/reflect/MethodHandleCharacterFieldAccessorImpl.class
new file mode 100644
index 0000000000000000000000000000000000000000..601884a85c75fff1296649c2fa084e47a7708fe8
GIT binary patch
literal 5792
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/reflect/MethodHandleCharacterFieldAccessorImpl.java b/tests/test_data/std/jdk/internal/reflect/MethodHandleCharacterFieldAccessorImpl.java
new file mode 100644
index 00000000..c1f35732
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/reflect/MethodHandleCharacterFieldAccessorImpl.java
@@ -0,0 +1,185 @@
+/*
+ * Copyright (c) 2021, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package jdk.internal.reflect;
+
+import java.lang.invoke.MethodHandle;
+import java.lang.invoke.MethodType;
+import java.lang.reflect.Field;
+import java.lang.reflect.Modifier;
+
+class MethodHandleCharacterFieldAccessorImpl extends MethodHandleFieldAccessorImpl {
+    static FieldAccessorImpl fieldAccessor(Field field, MethodHandle getter, MethodHandle setter, boolean isReadOnly) {
+        boolean isStatic = Modifier.isStatic(field.getModifiers());
+        if (isStatic) {
+            getter = getter.asType(MethodType.methodType(char.class));
+            if (setter != null) {
+                setter = setter.asType(MethodType.methodType(void.class, char.class));
+            }
+        } else {
+            getter = getter.asType(MethodType.methodType(char.class, Object.class));
+            if (setter != null) {
+                setter = setter.asType(MethodType.methodType(void.class, Object.class, char.class));
+            }
+        }
+        return new MethodHandleCharacterFieldAccessorImpl(field, getter, setter, isReadOnly, isStatic);
+    }
+
+    MethodHandleCharacterFieldAccessorImpl(Field field, MethodHandle getter, MethodHandle setter, boolean isReadOnly, boolean isStatic) {
+        super(field, getter, setter, isReadOnly, isStatic);
+    }
+
+    public Object get(Object obj) throws IllegalArgumentException {
+        return Character.valueOf(getChar(obj));
+    }
+
+    public boolean getBoolean(Object obj) throws IllegalArgumentException {
+        throw newGetBooleanIllegalArgumentException();
+    }
+
+    public byte getByte(Object obj) throws IllegalArgumentException {
+        throw newGetByteIllegalArgumentException();
+    }
+
+    public char getChar(Object obj) throws IllegalArgumentException {
+        try {
+            if (isStatic()) {
+                return (char) getter.invokeExact();
+            } else {
+                return (char) getter.invokeExact(obj);
+            }
+        } catch (IllegalArgumentException|NullPointerException e) {
+            throw e;
+        } catch (ClassCastException e) {
+            throw newGetIllegalArgumentException(obj);
+        } catch (Throwable e) {
+            throw new InternalError(e);
+        }
+    }
+
+    public short getShort(Object obj) throws IllegalArgumentException {
+        throw newGetShortIllegalArgumentException();
+    }
+
+    public int getInt(Object obj) throws IllegalArgumentException {
+        return getChar(obj);
+    }
+
+    public long getLong(Object obj) throws IllegalArgumentException {
+        return getChar(obj);
+    }
+
+    public float getFloat(Object obj) throws IllegalArgumentException {
+        return getChar(obj);
+    }
+
+    public double getDouble(Object obj) throws IllegalArgumentException {
+        return getChar(obj);
+    }
+
+    public void set(Object obj, Object value)
+            throws IllegalArgumentException, IllegalAccessException
+    {
+        ensureObj(obj);
+        if (isReadOnly()) {
+            throwFinalFieldIllegalAccessException(value);
+        }
+
+        if (value == null) {
+            throwSetIllegalArgumentException(value);
+        }
+
+        if (value instanceof Character c) {
+            setChar(obj, c.charValue());
+        } else {
+            throwSetIllegalArgumentException(value);
+        }
+    }
+
+    public void setBoolean(Object obj, boolean z)
+        throws IllegalArgumentException, IllegalAccessException
+    {
+        throwSetIllegalArgumentException(z);
+    }
+
+    public void setByte(Object obj, byte b)
+        throws IllegalArgumentException, IllegalAccessException
+    {
+        throwSetIllegalArgumentException(b);
+    }
+
+    public void setChar(Object obj, char c)
+        throws IllegalArgumentException, IllegalAccessException
+    {
+        if (isReadOnly()) {
+            ensureObj(obj);     // throw NPE if obj is null on instance field
+            throwFinalFieldIllegalAccessException(c);
+        }
+        try {
+            if (isStatic()) {
+                setter.invokeExact(c);
+            } else {
+                setter.invokeExact(obj, c);
+            }
+        } catch (IllegalArgumentException|NullPointerException e) {
+            throw e;
+        } catch (ClassCastException e) {
+            // receiver is of invalid type
+            throw newSetIllegalArgumentException(obj);
+        } catch (Throwable e) {
+            throw new InternalError(e);
+        }
+    }
+
+    public void setShort(Object obj, short s)
+        throws IllegalArgumentException, IllegalAccessException
+    {
+        throwSetIllegalArgumentException(s);
+    }
+
+    public void setInt(Object obj, int i)
+        throws IllegalArgumentException, IllegalAccessException
+    {
+        throwSetIllegalArgumentException(i);
+    }
+
+    public void setLong(Object obj, long l)
+        throws IllegalArgumentException, IllegalAccessException
+    {
+        throwSetIllegalArgumentException(l);
+    }
+
+    public void setFloat(Object obj, float f)
+        throws IllegalArgumentException, IllegalAccessException
+    {
+        throwSetIllegalArgumentException(f);
+    }
+
+    public void setDouble(Object obj, double d)
+        throws IllegalArgumentException, IllegalAccessException
+    {
+        throwSetIllegalArgumentException(d);
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/reflect/MethodHandleDoubleFieldAccessorImpl.class b/tests/test_data/std/jdk/internal/reflect/MethodHandleDoubleFieldAccessorImpl.class
new file mode 100644
index 0000000000000000000000000000000000000000..c815f0f856b30a9db94ae2c4d9813e236216ff75
GIT binary patch
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/reflect/MethodHandleDoubleFieldAccessorImpl.java b/tests/test_data/std/jdk/internal/reflect/MethodHandleDoubleFieldAccessorImpl.java
new file mode 100644
index 00000000..01652951
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/reflect/MethodHandleDoubleFieldAccessorImpl.java
@@ -0,0 +1,204 @@
+/*
+ * Copyright (c) 2021, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package jdk.internal.reflect;
+
+import java.lang.invoke.MethodHandle;
+import java.lang.invoke.MethodType;
+import java.lang.reflect.Field;
+import java.lang.reflect.Modifier;
+
+class MethodHandleDoubleFieldAccessorImpl extends MethodHandleFieldAccessorImpl {
+    static FieldAccessorImpl fieldAccessor(Field field, MethodHandle getter, MethodHandle setter, boolean isReadOnly) {
+        boolean isStatic = Modifier.isStatic(field.getModifiers());
+        if (isStatic) {
+            getter = getter.asType(MethodType.methodType(double.class));
+            if (setter != null) {
+                setter = setter.asType(MethodType.methodType(void.class, double.class));
+            }
+        } else {
+            getter = getter.asType(MethodType.methodType(double.class, Object.class));
+            if (setter != null) {
+                setter = setter.asType(MethodType.methodType(void.class, Object.class, double.class));
+            }
+        }
+        return new MethodHandleDoubleFieldAccessorImpl(field, getter, setter, isReadOnly, isStatic);
+    }
+
+    MethodHandleDoubleFieldAccessorImpl(Field field, MethodHandle getter, MethodHandle setter, boolean isReadOnly, boolean isStatic) {
+        super(field, getter, setter, isReadOnly, isStatic);
+    }
+
+    public Object get(Object obj) throws IllegalArgumentException {
+        return Double.valueOf(getDouble(obj));
+    }
+
+    public boolean getBoolean(Object obj) throws IllegalArgumentException {
+        throw newGetBooleanIllegalArgumentException();
+    }
+
+    public byte getByte(Object obj) throws IllegalArgumentException {
+        throw newGetByteIllegalArgumentException();
+    }
+
+    public char getChar(Object obj) throws IllegalArgumentException {
+        throw newGetCharIllegalArgumentException();
+    }
+
+    public short getShort(Object obj) throws IllegalArgumentException {
+        throw newGetShortIllegalArgumentException();
+    }
+
+    public int getInt(Object obj) throws IllegalArgumentException {
+        throw newGetIntIllegalArgumentException();
+    }
+
+    public long getLong(Object obj) throws IllegalArgumentException {
+        throw newGetLongIllegalArgumentException();
+    }
+
+    public float getFloat(Object obj) throws IllegalArgumentException {
+        throw newGetFloatIllegalArgumentException();
+    }
+
+    public double getDouble(Object obj) throws IllegalArgumentException {
+        try {
+            if (isStatic()) {
+                return (double) getter.invokeExact();
+            } else {
+                return (double) getter.invokeExact(obj);
+            }
+        } catch (IllegalArgumentException|NullPointerException e) {
+            throw e;
+        } catch (ClassCastException e) {
+            throw newGetIllegalArgumentException(obj);
+        } catch (Throwable e) {
+            throw new InternalError(e);
+        }
+    }
+
+    public void set(Object obj, Object value)
+            throws IllegalArgumentException, IllegalAccessException
+    {
+        ensureObj(obj);
+        if (isReadOnly()) {
+            throwFinalFieldIllegalAccessException(value);
+        }
+
+        if (value == null) {
+            throwSetIllegalArgumentException(value);
+        }
+
+        if (value instanceof Byte b) {
+            setDouble(obj, b.byteValue());
+        }
+        else if (value instanceof Short s) {
+            setDouble(obj, s.shortValue());
+        }
+        else if (value instanceof Character c) {
+            setDouble(obj, c.charValue());
+        }
+        else if (value instanceof Integer i) {
+            setDouble(obj, i.intValue());
+        }
+        else if (value instanceof Long l) {
+            setDouble(obj, l.longValue());
+        }
+        else if (value instanceof Float f) {
+            setDouble(obj, f.floatValue());
+        }
+        else if (value instanceof Double d) {
+            setDouble(obj, d.doubleValue());
+        }
+        else {
+            throwSetIllegalArgumentException(value);
+        }
+    }
+
+    public void setBoolean(Object obj, boolean z)
+        throws IllegalArgumentException, IllegalAccessException
+    {
+        throwSetIllegalArgumentException(z);
+    }
+
+    public void setByte(Object obj, byte b)
+        throws IllegalArgumentException, IllegalAccessException
+    {
+        setDouble(obj, b);
+    }
+
+    public void setChar(Object obj, char c)
+        throws IllegalArgumentException, IllegalAccessException
+    {
+        setDouble(obj, c);
+    }
+
+    public void setShort(Object obj, short s)
+        throws IllegalArgumentException, IllegalAccessException
+    {
+        setDouble(obj, s);
+    }
+
+    public void setInt(Object obj, int i)
+        throws IllegalArgumentException, IllegalAccessException
+    {
+        setDouble(obj, i);
+    }
+
+    public void setLong(Object obj, long l)
+        throws IllegalArgumentException, IllegalAccessException
+    {
+        setDouble(obj, l);
+    }
+
+    public void setFloat(Object obj, float f)
+        throws IllegalArgumentException, IllegalAccessException
+    {
+        setDouble(obj, f);
+    }
+
+    public void setDouble(Object obj, double d)
+        throws IllegalArgumentException, IllegalAccessException
+    {
+        if (isReadOnly()) {
+            ensureObj(obj);     // throw NPE if obj is null on instance field
+            throwFinalFieldIllegalAccessException(d);
+        }
+        try {
+            if (isStatic()) {
+                setter.invokeExact(d);
+            } else {
+                setter.invokeExact(obj, d);
+            }
+        } catch (IllegalArgumentException|NullPointerException e) {
+            throw e;
+        } catch (ClassCastException e) {
+            // receiver is of invalid type
+            throw newSetIllegalArgumentException(obj);
+        } catch (Throwable e) {
+            throw new InternalError(e);
+        }
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/reflect/MethodHandleFieldAccessorImpl.class b/tests/test_data/std/jdk/internal/reflect/MethodHandleFieldAccessorImpl.class
new file mode 100644
index 0000000000000000000000000000000000000000..219fbff571d03c0bcf5c8ec28fabb1d8dfeb0873
GIT binary patch
literal 3207
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vs9KUu=XBCu_=8}ZPz|zQNT9qNs4Ppier9ETPQK@Jy7>Qa68PT9*bn~#db7&0

literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/reflect/MethodHandleFieldAccessorImpl.java b/tests/test_data/std/jdk/internal/reflect/MethodHandleFieldAccessorImpl.java
new file mode 100644
index 00000000..f979d38f
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/reflect/MethodHandleFieldAccessorImpl.java
@@ -0,0 +1,96 @@
+/*
+ * Copyright (c) 2021, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package jdk.internal.reflect;
+
+import java.lang.invoke.MethodHandle;
+import java.lang.reflect.Field;
+import java.lang.reflect.Modifier;
+
+abstract class MethodHandleFieldAccessorImpl extends FieldAccessorImpl {
+    private static final int IS_READ_ONLY_BIT = 0x0001;
+    private static final int IS_STATIC_BIT = 0x0002;
+    private static final int NONZERO_BIT = 0x8000;
+
+    private final int fieldFlags;
+    protected final MethodHandle getter;
+    protected final MethodHandle setter;
+
+    protected MethodHandleFieldAccessorImpl(Field field, MethodHandle getter, MethodHandle setter, boolean isReadOnly, boolean isStatic) {
+        super(field);
+        this.fieldFlags = (isReadOnly ? IS_READ_ONLY_BIT : 0) |
+                          (isStatic ? IS_STATIC_BIT : 0) |
+                          NONZERO_BIT;
+        this.getter = getter;
+        this.setter = setter;
+    }
+
+    protected final boolean isReadOnly() {
+        return (fieldFlags & IS_READ_ONLY_BIT) == IS_READ_ONLY_BIT;
+    }
+
+    protected final boolean isStatic() {
+        return (fieldFlags & IS_STATIC_BIT) == IS_STATIC_BIT;
+    }
+
+    protected final void ensureObj(Object o) {
+        if (!isStatic()) {
+            // for compatibility, check the receiver object first
+            // throw NullPointerException if o is null
+            if (!field.getDeclaringClass().isAssignableFrom(o.getClass())) {
+                throwSetIllegalArgumentException(o);
+            }
+        }
+    }
+
+    private String getMessage(boolean getter, Class<?> type) {
+        String err = "Can not " + (getter ? "get" : "set");
+        if (Modifier.isStatic(field.getModifiers()))
+            err += " static";
+        if (Modifier.isFinal(field.getModifiers()))
+            err += " final";
+        err += " " + field.getType().getName() + " field " + getQualifiedFieldName();
+        if (type != null) {
+            err += " on " + type.getName();
+        }
+        return err;
+    }
+
+    /**
+     * IllegalArgumentException because Field::get on the specified object, which
+     * is not an instance of the class or interface declaring the underlying method
+     */
+    protected IllegalArgumentException newGetIllegalArgumentException(Object o) {
+        return new IllegalArgumentException(getMessage(true, o != null ? o.getClass() : null));
+    }
+
+    /**
+     * IllegalArgumentException because Field::set on the specified object, which
+     * is not an instance of the class or interface declaring the underlying method
+     */
+    protected IllegalArgumentException newSetIllegalArgumentException(Object o) {
+        return new IllegalArgumentException(getMessage(false, o != null ? o.getClass() : null));
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/reflect/MethodHandleFloatFieldAccessorImpl.class b/tests/test_data/std/jdk/internal/reflect/MethodHandleFloatFieldAccessorImpl.class
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/reflect/MethodHandleFloatFieldAccessorImpl.java b/tests/test_data/std/jdk/internal/reflect/MethodHandleFloatFieldAccessorImpl.java
new file mode 100644
index 00000000..5ac00ec5
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/reflect/MethodHandleFloatFieldAccessorImpl.java
@@ -0,0 +1,201 @@
+/*
+ * Copyright (c) 2021, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package jdk.internal.reflect;
+
+import java.lang.invoke.MethodHandle;
+import java.lang.invoke.MethodType;
+import java.lang.reflect.Field;
+import java.lang.reflect.Modifier;
+
+class MethodHandleFloatFieldAccessorImpl extends MethodHandleFieldAccessorImpl {
+    static FieldAccessorImpl fieldAccessor(Field field, MethodHandle getter, MethodHandle setter, boolean isReadOnly) {
+        boolean isStatic = Modifier.isStatic(field.getModifiers());
+        if (isStatic) {
+            getter = getter.asType(MethodType.methodType(float.class));
+            if (setter != null) {
+                setter = setter.asType(MethodType.methodType(void.class, float.class));
+            }
+        } else {
+            getter = getter.asType(MethodType.methodType(float.class, Object.class));
+            if (setter != null) {
+                setter = setter.asType(MethodType.methodType(void.class, Object.class, float.class));
+            }
+        }
+        return new MethodHandleFloatFieldAccessorImpl(field, getter, setter, isReadOnly, isStatic);
+    }
+
+    MethodHandleFloatFieldAccessorImpl(Field field, MethodHandle getter, MethodHandle setter, boolean isReadOnly, boolean isStatic) {
+        super(field, getter, setter, isReadOnly, isStatic);
+    }
+
+    public Object get(Object obj) throws IllegalArgumentException {
+        return Float.valueOf(getFloat(obj));
+    }
+
+    public boolean getBoolean(Object obj) throws IllegalArgumentException {
+        throw newGetBooleanIllegalArgumentException();
+    }
+
+    public byte getByte(Object obj) throws IllegalArgumentException {
+        throw newGetByteIllegalArgumentException();
+    }
+
+    public char getChar(Object obj) throws IllegalArgumentException {
+        throw newGetCharIllegalArgumentException();
+    }
+
+    public short getShort(Object obj) throws IllegalArgumentException {
+        throw newGetShortIllegalArgumentException();
+    }
+
+    public int getInt(Object obj) throws IllegalArgumentException {
+        throw newGetIntIllegalArgumentException();
+    }
+
+    public long getLong(Object obj) throws IllegalArgumentException {
+        throw newGetLongIllegalArgumentException();
+    }
+
+    public float getFloat(Object obj) throws IllegalArgumentException {
+        try {
+            if (isStatic()) {
+                return (float) getter.invokeExact();
+            } else {
+                return (float) getter.invokeExact(obj);
+            }
+        } catch (IllegalArgumentException|NullPointerException e) {
+            throw e;
+        } catch (ClassCastException e) {
+            throw newGetIllegalArgumentException(obj);
+        } catch (Throwable e) {
+            throw new InternalError(e);
+        }
+    }
+
+    public double getDouble(Object obj) throws IllegalArgumentException {
+        return getFloat(obj);
+    }
+
+    public void set(Object obj, Object value)
+            throws IllegalArgumentException, IllegalAccessException
+    {
+        ensureObj(obj);
+        if (isReadOnly()) {
+            throwFinalFieldIllegalAccessException(value);
+        }
+
+        if (value == null) {
+            throwSetIllegalArgumentException(value);
+        }
+
+        if (value instanceof Byte b) {
+            setFloat(obj, b.byteValue());
+        }
+        else if (value instanceof Short s) {
+            setFloat(obj, s.shortValue());
+        }
+        else if (value instanceof Character c) {
+            setFloat(obj, c.charValue());
+        }
+        else if (value instanceof Integer i) {
+            setFloat(obj, i.intValue());
+        }
+        else if (value instanceof Long l) {
+            setFloat(obj, l.longValue());
+        }
+        else if (value instanceof Float f) {
+            setFloat(obj, f.floatValue());
+        }
+        else {
+            throwSetIllegalArgumentException(value);
+        }
+    }
+
+    public void setBoolean(Object obj, boolean z)
+        throws IllegalArgumentException, IllegalAccessException
+    {
+        throwSetIllegalArgumentException(z);
+    }
+
+    public void setByte(Object obj, byte b)
+        throws IllegalArgumentException, IllegalAccessException
+    {
+        setFloat(obj, b);
+    }
+
+    public void setChar(Object obj, char c)
+        throws IllegalArgumentException, IllegalAccessException
+    {
+        setFloat(obj, c);
+    }
+
+    public void setShort(Object obj, short s)
+        throws IllegalArgumentException, IllegalAccessException
+    {
+        setFloat(obj, s);
+    }
+
+    public void setInt(Object obj, int i)
+        throws IllegalArgumentException, IllegalAccessException
+    {
+        setFloat(obj, i);
+    }
+
+    public void setLong(Object obj, long l)
+        throws IllegalArgumentException, IllegalAccessException
+    {
+        setFloat(obj, l);
+    }
+
+    public void setFloat(Object obj, float f)
+        throws IllegalArgumentException, IllegalAccessException
+    {
+        if (isReadOnly()) {
+            ensureObj(obj);     // throw NPE if obj is null on instance field
+            throwFinalFieldIllegalAccessException(f);
+        }
+        try {
+            if (isStatic()) {
+                setter.invokeExact(f);
+            } else {
+                setter.invokeExact(obj, f);
+            }
+        } catch (IllegalArgumentException|NullPointerException e) {
+            throw e;
+        } catch (ClassCastException e) {
+            // receiver is of invalid type
+            throw newSetIllegalArgumentException(obj);
+        } catch (Throwable e) {
+            throw new InternalError(e);
+        }
+    }
+
+    public void setDouble(Object obj, double d)
+        throws IllegalArgumentException, IllegalAccessException
+    {
+        throwSetIllegalArgumentException(d);
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/reflect/MethodHandleIntegerFieldAccessorImpl.class b/tests/test_data/std/jdk/internal/reflect/MethodHandleIntegerFieldAccessorImpl.class
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diff --git a/tests/test_data/std/jdk/internal/reflect/MethodHandleIntegerFieldAccessorImpl.java b/tests/test_data/std/jdk/internal/reflect/MethodHandleIntegerFieldAccessorImpl.java
new file mode 100644
index 00000000..62e3ab08
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/reflect/MethodHandleIntegerFieldAccessorImpl.java
@@ -0,0 +1,195 @@
+/*
+ * Copyright (c) 2021, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package jdk.internal.reflect;
+
+import java.lang.invoke.MethodHandle;
+import java.lang.invoke.MethodType;
+import java.lang.reflect.Field;
+import java.lang.reflect.Modifier;
+
+class MethodHandleIntegerFieldAccessorImpl extends MethodHandleFieldAccessorImpl {
+    static FieldAccessorImpl fieldAccessor(Field field, MethodHandle getter, MethodHandle setter, boolean isReadOnly) {
+        boolean isStatic = Modifier.isStatic(field.getModifiers());
+        if (isStatic) {
+            getter = getter.asType(MethodType.methodType(int.class));
+            if (setter != null) {
+                setter = setter.asType(MethodType.methodType(void.class, int.class));
+            }
+        } else {
+            getter = getter.asType(MethodType.methodType(int.class, Object.class));
+            if (setter != null) {
+                setter = setter.asType(MethodType.methodType(void.class, Object.class, int.class));
+            }
+        }
+        return new MethodHandleIntegerFieldAccessorImpl(field, getter, setter, isReadOnly, isStatic);
+    }
+
+    MethodHandleIntegerFieldAccessorImpl(Field field, MethodHandle getter, MethodHandle setter, boolean isReadOnly, boolean isStatic) {
+        super(field, getter, setter, isReadOnly, isStatic);
+    }
+
+    public Object get(Object obj) throws IllegalArgumentException {
+        return Integer.valueOf(getInt(obj));
+    }
+
+    public boolean getBoolean(Object obj) throws IllegalArgumentException {
+        throw newGetBooleanIllegalArgumentException();
+    }
+
+    public byte getByte(Object obj) throws IllegalArgumentException {
+        throw newGetByteIllegalArgumentException();
+    }
+
+    public char getChar(Object obj) throws IllegalArgumentException {
+        throw newGetCharIllegalArgumentException();
+    }
+
+    public short getShort(Object obj) throws IllegalArgumentException {
+        throw newGetShortIllegalArgumentException();
+    }
+
+    public int getInt(Object obj) throws IllegalArgumentException {
+        try {
+            if (isStatic()) {
+                return (int) getter.invokeExact();
+            } else {
+                return (int) getter.invokeExact(obj);
+            }
+        } catch (IllegalArgumentException|NullPointerException e) {
+            throw e;
+        } catch (ClassCastException e) {
+            throw newGetIllegalArgumentException(obj);
+        } catch (Throwable e) {
+            throw new InternalError(e);
+        }
+    }
+
+    public long getLong(Object obj) throws IllegalArgumentException {
+        return getInt(obj);
+    }
+
+    public float getFloat(Object obj) throws IllegalArgumentException {
+        return getInt(obj);
+    }
+
+    public double getDouble(Object obj) throws IllegalArgumentException {
+        return getInt(obj);
+    }
+
+    public void set(Object obj, Object value)
+            throws IllegalArgumentException, IllegalAccessException
+    {
+        ensureObj(obj);
+        if (isReadOnly()) {
+            throwFinalFieldIllegalAccessException(value);
+        }
+
+        if (value == null) {
+            throwSetIllegalArgumentException(value);
+        }
+
+        if (value instanceof Byte b) {
+            setInt(obj, b.byteValue());
+        }
+        else if (value instanceof Short s) {
+            setInt(obj, s.shortValue());
+        }
+        else if (value instanceof Character c) {
+            setInt(obj, c.charValue());
+        }
+        else if (value instanceof Integer i) {
+            setInt(obj, i.intValue());
+        }
+        else {
+            throwSetIllegalArgumentException(value);
+        }
+    }
+
+    public void setBoolean(Object obj, boolean z)
+        throws IllegalArgumentException, IllegalAccessException
+    {
+        throwSetIllegalArgumentException(z);
+    }
+
+    public void setByte(Object obj, byte b)
+        throws IllegalArgumentException, IllegalAccessException
+    {
+        setInt(obj, b);
+    }
+
+    public void setChar(Object obj, char c)
+        throws IllegalArgumentException, IllegalAccessException
+    {
+        setInt(obj, c);
+    }
+
+    public void setShort(Object obj, short s)
+        throws IllegalArgumentException, IllegalAccessException
+    {
+        setInt(obj, s);
+    }
+
+    public void setInt(Object obj, int i)
+        throws IllegalArgumentException, IllegalAccessException
+    {
+        if (isReadOnly()) {
+            ensureObj(obj);     // throw NPE if obj is null on instance field
+            throwFinalFieldIllegalAccessException(i);
+        }
+        try {
+            if (isStatic()) {
+                setter.invokeExact(i);
+            } else {
+                setter.invokeExact(obj, i);
+            }
+        } catch (IllegalArgumentException|NullPointerException e) {
+            throw e;
+        } catch (ClassCastException e) {
+            // receiver is of invalid type
+            throw newSetIllegalArgumentException(obj);
+        } catch (Throwable e) {
+            throw new InternalError(e);
+        }
+    }
+
+    public void setLong(Object obj, long l)
+        throws IllegalArgumentException, IllegalAccessException
+    {
+        throwSetIllegalArgumentException(l);
+    }
+
+    public void setFloat(Object obj, float f)
+        throws IllegalArgumentException, IllegalAccessException
+    {
+        throwSetIllegalArgumentException(f);
+    }
+
+    public void setDouble(Object obj, double d)
+        throws IllegalArgumentException, IllegalAccessException
+    {
+        throwSetIllegalArgumentException(d);
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/reflect/MethodHandleLongFieldAccessorImpl.class b/tests/test_data/std/jdk/internal/reflect/MethodHandleLongFieldAccessorImpl.class
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/reflect/MethodHandleLongFieldAccessorImpl.java b/tests/test_data/std/jdk/internal/reflect/MethodHandleLongFieldAccessorImpl.java
new file mode 100644
index 00000000..a0e02204
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/reflect/MethodHandleLongFieldAccessorImpl.java
@@ -0,0 +1,198 @@
+/*
+ * Copyright (c) 2021, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package jdk.internal.reflect;
+
+import java.lang.invoke.MethodHandle;
+import java.lang.invoke.MethodType;
+import java.lang.reflect.Field;
+import java.lang.reflect.Modifier;
+
+class MethodHandleLongFieldAccessorImpl extends MethodHandleFieldAccessorImpl {
+    static FieldAccessorImpl fieldAccessor(Field field, MethodHandle getter, MethodHandle setter, boolean isReadOnly) {
+        boolean isStatic = Modifier.isStatic(field.getModifiers());
+        if (isStatic) {
+            getter = getter.asType(MethodType.methodType(long.class));
+            if (setter != null) {
+                setter = setter.asType(MethodType.methodType(void.class, long.class));
+            }
+        } else {
+            getter = getter.asType(MethodType.methodType(long.class, Object.class));
+            if (setter != null) {
+                setter = setter.asType(MethodType.methodType(void.class, Object.class, long.class));
+            }
+        }
+        return new MethodHandleLongFieldAccessorImpl(field, getter, setter, isReadOnly, isStatic);
+    }
+
+    MethodHandleLongFieldAccessorImpl(Field field, MethodHandle getter, MethodHandle setter, boolean isReadOnly, boolean isStatic) {
+        super(field, getter, setter, isReadOnly, isStatic);
+    }
+
+    public Object get(Object obj) throws IllegalArgumentException {
+        return Long.valueOf(getLong(obj));
+    }
+
+    public boolean getBoolean(Object obj) throws IllegalArgumentException {
+        throw newGetBooleanIllegalArgumentException();
+    }
+
+    public byte getByte(Object obj) throws IllegalArgumentException {
+        throw newGetByteIllegalArgumentException();
+    }
+
+    public char getChar(Object obj) throws IllegalArgumentException {
+        throw newGetCharIllegalArgumentException();
+    }
+
+    public short getShort(Object obj) throws IllegalArgumentException {
+        throw newGetShortIllegalArgumentException();
+    }
+
+    public int getInt(Object obj) throws IllegalArgumentException {
+        throw newGetIntIllegalArgumentException();
+    }
+
+    public long getLong(Object obj) throws IllegalArgumentException {
+        try {
+            if (isStatic()) {
+                return (long) getter.invokeExact();
+            } else {
+                return (long) getter.invokeExact(obj);
+            }
+        } catch (IllegalArgumentException|NullPointerException e) {
+            throw e;
+        } catch (ClassCastException e) {
+            throw newGetIllegalArgumentException(obj);
+        } catch (Throwable e) {
+            throw new InternalError(e);
+        }
+    }
+
+    public float getFloat(Object obj) throws IllegalArgumentException {
+        return getLong(obj);
+    }
+
+    public double getDouble(Object obj) throws IllegalArgumentException {
+        return getLong(obj);
+    }
+
+    public void set(Object obj, Object value)
+            throws IllegalArgumentException, IllegalAccessException
+    {
+        ensureObj(obj);
+        if (isReadOnly()) {
+            throwFinalFieldIllegalAccessException(value);
+        }
+
+        if (value == null) {
+            throwSetIllegalArgumentException(value);
+        }
+
+        if (value instanceof Byte b) {
+            setLong(obj, b.byteValue());
+        }
+        else if (value instanceof Short s) {
+            setLong(obj, s.shortValue());
+        }
+        else if (value instanceof Character c) {
+            setLong(obj, c.charValue());
+        }
+        else if (value instanceof Integer i) {
+            setLong(obj, i.intValue());
+        }
+        else if (value instanceof Long l) {
+            setLong(obj, l.longValue());
+        }
+        else {
+            throwSetIllegalArgumentException(value);
+        }
+    }
+
+    public void setBoolean(Object obj, boolean z)
+        throws IllegalArgumentException, IllegalAccessException
+    {
+        throwSetIllegalArgumentException(z);
+    }
+
+    public void setByte(Object obj, byte b)
+        throws IllegalArgumentException, IllegalAccessException
+    {
+        setLong(obj, b);
+    }
+
+    public void setChar(Object obj, char c)
+        throws IllegalArgumentException, IllegalAccessException
+    {
+        setLong(obj, c);
+    }
+
+    public void setShort(Object obj, short s)
+        throws IllegalArgumentException, IllegalAccessException
+    {
+        setLong(obj, s);
+    }
+
+    public void setInt(Object obj, int i)
+        throws IllegalArgumentException, IllegalAccessException
+    {
+        setLong(obj, i);
+    }
+
+    public void setLong(Object obj, long l)
+        throws IllegalArgumentException, IllegalAccessException
+    {
+        if (isReadOnly()) {
+            ensureObj(obj);     // throw NPE if obj is null on instance field
+            throwFinalFieldIllegalAccessException(l);
+        }
+        try {
+            if (isStatic()) {
+                setter.invokeExact(l);
+            } else {
+                setter.invokeExact(obj, l);
+            }
+        } catch (IllegalArgumentException|NullPointerException e) {
+            throw e;
+        } catch (ClassCastException e) {
+            // receiver is of invalid type
+            throw newSetIllegalArgumentException(obj);
+        } catch (Throwable e) {
+            throw new InternalError(e);
+        }
+    }
+
+    public void setFloat(Object obj, float f)
+        throws IllegalArgumentException, IllegalAccessException
+    {
+        throwSetIllegalArgumentException(f);
+    }
+
+    public void setDouble(Object obj, double d)
+        throws IllegalArgumentException, IllegalAccessException
+    {
+        throwSetIllegalArgumentException(d);
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/reflect/MethodHandleObjectFieldAccessorImpl.class b/tests/test_data/std/jdk/internal/reflect/MethodHandleObjectFieldAccessorImpl.class
new file mode 100644
index 0000000000000000000000000000000000000000..2cd244f600a909c449a8c17c41d47e143f7f0388
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/reflect/MethodHandleObjectFieldAccessorImpl.java b/tests/test_data/std/jdk/internal/reflect/MethodHandleObjectFieldAccessorImpl.java
new file mode 100644
index 00000000..722d73d2
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/reflect/MethodHandleObjectFieldAccessorImpl.java
@@ -0,0 +1,168 @@
+/*
+ * Copyright (c) 2021, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package jdk.internal.reflect;
+
+import java.lang.invoke.MethodHandle;
+import java.lang.invoke.MethodType;
+import java.lang.reflect.Field;
+import java.lang.reflect.Modifier;
+
+class MethodHandleObjectFieldAccessorImpl extends MethodHandleFieldAccessorImpl {
+    static FieldAccessorImpl fieldAccessor(Field field, MethodHandle getter, MethodHandle setter, boolean isReadOnly) {
+        boolean isStatic = Modifier.isStatic(field.getModifiers());
+        if (isStatic) {
+            getter = getter.asType(MethodType.methodType(Object.class));
+            if (setter != null) {
+                setter = setter.asType(MethodType.methodType(void.class, Object.class));
+            }
+        } else {
+            getter = getter.asType(MethodType.methodType(Object.class, Object.class));
+            if (setter != null) {
+                setter = setter.asType(MethodType.methodType(void.class, Object.class, Object.class));
+            }
+        }
+        return new MethodHandleObjectFieldAccessorImpl(field, getter, setter, isReadOnly, isStatic);
+    }
+
+    MethodHandleObjectFieldAccessorImpl(Field field, MethodHandle getter, MethodHandle setter, boolean isReadOnly, boolean isStatic) {
+        super(field, getter, setter, isReadOnly, isStatic);
+    }
+
+    @Override
+    public Object get(Object obj) throws IllegalArgumentException {
+        try {
+            return isStatic() ? getter.invokeExact() : getter.invokeExact(obj);
+        } catch (IllegalArgumentException|NullPointerException e) {
+            throw e;
+        } catch (ClassCastException e) {
+            throw newGetIllegalArgumentException(obj);
+        } catch (Throwable e) {
+            throw new InternalError(e);
+        }
+    }
+
+    public boolean getBoolean(Object obj) throws IllegalArgumentException {
+        throw newGetBooleanIllegalArgumentException();
+    }
+
+    public byte getByte(Object obj) throws IllegalArgumentException {
+        throw newGetByteIllegalArgumentException();
+    }
+
+    public char getChar(Object obj) throws IllegalArgumentException {
+        throw newGetCharIllegalArgumentException();
+    }
+
+    public short getShort(Object obj) throws IllegalArgumentException {
+        throw newGetShortIllegalArgumentException();
+    }
+
+    public int getInt(Object obj) throws IllegalArgumentException {
+        throw newGetIntIllegalArgumentException();
+    }
+
+    public long getLong(Object obj) throws IllegalArgumentException {
+        throw newGetLongIllegalArgumentException();
+    }
+
+    public float getFloat(Object obj) throws IllegalArgumentException {
+        throw newGetFloatIllegalArgumentException();
+    }
+
+    public double getDouble(Object obj) throws IllegalArgumentException {
+        throw newGetDoubleIllegalArgumentException();
+    }
+
+    @Override
+    public void set(Object obj, Object value) throws IllegalAccessException {
+        ensureObj(obj);
+        if (isReadOnly()) {
+            throwFinalFieldIllegalAccessException(value);
+        }
+        try {
+            if (isStatic()) {
+                setter.invokeExact(value);
+            } else {
+                setter.invokeExact(obj, value);
+            }
+        } catch (IllegalArgumentException|NullPointerException e) {
+            throw e;
+        } catch (ClassCastException e) {
+            // already ensure the receiver type.  So this CCE is due to the value.
+            throwSetIllegalArgumentException(value);
+        } catch (Throwable e) {
+            throw new InternalError(e);
+        }
+    }
+
+    public void setBoolean(Object obj, boolean z)
+        throws IllegalArgumentException, IllegalAccessException
+    {
+        throwSetIllegalArgumentException(z);
+    }
+
+    public void setByte(Object obj, byte b)
+        throws IllegalArgumentException, IllegalAccessException
+    {
+        throwSetIllegalArgumentException(b);
+    }
+
+    public void setChar(Object obj, char c)
+        throws IllegalArgumentException, IllegalAccessException
+    {
+        throwSetIllegalArgumentException(c);
+    }
+
+    public void setShort(Object obj, short s)
+        throws IllegalArgumentException, IllegalAccessException
+    {
+        throwSetIllegalArgumentException(s);
+    }
+
+    public void setInt(Object obj, int i)
+        throws IllegalArgumentException, IllegalAccessException
+    {
+        throwSetIllegalArgumentException(i);
+    }
+
+    public void setLong(Object obj, long l)
+        throws IllegalArgumentException, IllegalAccessException
+    {
+        throwSetIllegalArgumentException(l);
+    }
+
+    public void setFloat(Object obj, float f)
+        throws IllegalArgumentException, IllegalAccessException
+    {
+        throwSetIllegalArgumentException(f);
+    }
+
+    public void setDouble(Object obj, double d)
+        throws IllegalArgumentException, IllegalAccessException
+    {
+        throwSetIllegalArgumentException(d);
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/reflect/MethodHandleShortFieldAccessorImpl.class b/tests/test_data/std/jdk/internal/reflect/MethodHandleShortFieldAccessorImpl.class
new file mode 100644
index 0000000000000000000000000000000000000000..000269d82a2dba579bb6d3ed4f79ff80efb87dac
GIT binary patch
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HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/reflect/MethodHandleShortFieldAccessorImpl.java b/tests/test_data/std/jdk/internal/reflect/MethodHandleShortFieldAccessorImpl.java
new file mode 100644
index 00000000..265c5554
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/reflect/MethodHandleShortFieldAccessorImpl.java
@@ -0,0 +1,189 @@
+/*
+ * Copyright (c) 2021, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package jdk.internal.reflect;
+
+import java.lang.invoke.MethodHandle;
+import java.lang.invoke.MethodType;
+import java.lang.reflect.Field;
+import java.lang.reflect.Modifier;
+
+class MethodHandleShortFieldAccessorImpl extends MethodHandleFieldAccessorImpl {
+    static FieldAccessorImpl fieldAccessor(Field field, MethodHandle getter, MethodHandle setter, boolean isReadOnly) {
+        boolean isStatic = Modifier.isStatic(field.getModifiers());
+        if (isStatic) {
+            getter = getter.asType(MethodType.methodType(short.class));
+            if (setter != null) {
+                setter = setter.asType(MethodType.methodType(void.class, short.class));
+            }
+        } else {
+            getter = getter.asType(MethodType.methodType(short.class, Object.class));
+            if (setter != null) {
+                setter = setter.asType(MethodType.methodType(void.class, Object.class, short.class));
+            }
+        }
+        return new MethodHandleShortFieldAccessorImpl(field, getter, setter, isReadOnly, isStatic);
+    }
+
+    MethodHandleShortFieldAccessorImpl(Field field, MethodHandle getter, MethodHandle setter, boolean isReadOnly, boolean isStatic) {
+        super(field, getter, setter, isReadOnly, isStatic);
+    }
+
+    public Object get(Object obj) throws IllegalArgumentException {
+        return Short.valueOf(getShort(obj));
+    }
+
+    public boolean getBoolean(Object obj) throws IllegalArgumentException {
+        throw newGetBooleanIllegalArgumentException();
+    }
+
+    public byte getByte(Object obj) throws IllegalArgumentException {
+        throw newGetByteIllegalArgumentException();
+    }
+
+    public char getChar(Object obj) throws IllegalArgumentException {
+        throw newGetCharIllegalArgumentException();
+    }
+
+    public short getShort(Object obj) throws IllegalArgumentException {
+        try {
+            if (isStatic()) {
+                return (short) getter.invokeExact();
+            } else {
+                return (short) getter.invokeExact(obj);
+            }
+        } catch (IllegalArgumentException|NullPointerException e) {
+            throw e;
+        } catch (ClassCastException e) {
+            throw newGetIllegalArgumentException(obj);
+        } catch (Throwable e) {
+            throw new InternalError(e);
+        }
+    }
+
+    public int getInt(Object obj) throws IllegalArgumentException {
+        return getShort(obj);
+    }
+
+    public long getLong(Object obj) throws IllegalArgumentException {
+        return getShort(obj);
+    }
+
+    public float getFloat(Object obj) throws IllegalArgumentException {
+        return getShort(obj);
+    }
+
+    public double getDouble(Object obj) throws IllegalArgumentException {
+        return getShort(obj);
+    }
+
+    public void set(Object obj, Object value)
+            throws IllegalArgumentException, IllegalAccessException
+    {
+        ensureObj(obj);
+        if (isReadOnly()) {
+            throwFinalFieldIllegalAccessException(value);
+        }
+
+        if (value == null) {
+            throwSetIllegalArgumentException(value);
+        }
+
+        if (value instanceof Byte b) {
+            setShort(obj, b.byteValue());
+        }
+        else if (value instanceof Short s) {
+            setShort(obj, s.shortValue());
+        }
+        else {
+            throwSetIllegalArgumentException(value);
+        }
+    }
+
+    public void setBoolean(Object obj, boolean z)
+        throws IllegalArgumentException, IllegalAccessException
+    {
+        throwSetIllegalArgumentException(z);
+    }
+
+    public void setByte(Object obj, byte b)
+        throws IllegalArgumentException, IllegalAccessException
+    {
+        setShort(obj, b);
+    }
+
+    public void setChar(Object obj, char c)
+        throws IllegalArgumentException, IllegalAccessException
+    {
+        throwSetIllegalArgumentException(c);
+    }
+
+    public void setShort(Object obj, short s)
+        throws IllegalArgumentException, IllegalAccessException
+    {
+        if (isReadOnly()) {
+            ensureObj(obj);     // throw NPE if obj is null on instance field
+            throwFinalFieldIllegalAccessException(s);
+        }
+        try {
+            if (isStatic()) {
+                setter.invokeExact(s);
+            } else {
+                setter.invokeExact(obj, s);
+            }
+        } catch (IllegalArgumentException|NullPointerException e) {
+            throw e;
+        } catch (ClassCastException e) {
+            // receiver is of invalid type
+            throw newSetIllegalArgumentException(obj);
+        } catch (Throwable e) {
+            throw new InternalError(e);
+        }
+    }
+
+    public void setInt(Object obj, int i)
+        throws IllegalArgumentException, IllegalAccessException
+    {
+        throwSetIllegalArgumentException(i);
+    }
+
+    public void setLong(Object obj, long l)
+        throws IllegalArgumentException, IllegalAccessException
+    {
+        throwSetIllegalArgumentException(l);
+    }
+
+    public void setFloat(Object obj, float f)
+        throws IllegalArgumentException, IllegalAccessException
+    {
+        throwSetIllegalArgumentException(f);
+    }
+
+    public void setDouble(Object obj, double d)
+        throws IllegalArgumentException, IllegalAccessException
+    {
+        throwSetIllegalArgumentException(d);
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/reflect/Reflection$1Holder.class b/tests/test_data/std/jdk/internal/reflect/Reflection$1Holder.class
new file mode 100644
index 0000000000000000000000000000000000000000..757534b8deff56b5048b09acd6e0a61634919b4a
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/reflect/Reflection.class b/tests/test_data/std/jdk/internal/reflect/Reflection.class
new file mode 100644
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diff --git a/tests/test_data/std/jdk/internal/reflect/Reflection.java b/tests/test_data/std/jdk/internal/reflect/Reflection.java
new file mode 100644
index 00000000..f6fa4995
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/reflect/Reflection.java
@@ -0,0 +1,445 @@
+/*
+ * Copyright (c) 2001, 2023, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package jdk.internal.reflect;
+
+import java.lang.reflect.*;
+import java.util.HashMap;
+import java.util.Map;
+import java.util.Objects;
+import java.util.Set;
+
+import jdk.internal.access.JavaLangAccess;
+import jdk.internal.access.SharedSecrets;
+import jdk.internal.misc.VM;
+import jdk.internal.module.ModuleBootstrap;
+import jdk.internal.vm.annotation.ForceInline;
+import jdk.internal.vm.annotation.IntrinsicCandidate;
+
+/** Common utility routines used by both java.lang and
+    java.lang.reflect */
+
+public class Reflection {
+
+    /** Used to filter out fields and methods from certain classes from public
+        view, where they are sensitive or they may contain VM-internal objects.
+        These Maps are updated very rarely. Rather than synchronize on
+        each access, we use copy-on-write */
+    private static volatile Map<Class<?>, Set<String>> fieldFilterMap;
+    private static volatile Map<Class<?>, Set<String>> methodFilterMap;
+    private static final String WILDCARD = "*";
+    public static final Set<String> ALL_MEMBERS = Set.of(WILDCARD);
+
+    static {
+        fieldFilterMap = Map.of(
+            Reflection.class, ALL_MEMBERS,
+            AccessibleObject.class, ALL_MEMBERS,
+            Class.class, Set.of("classLoader", "classData"),
+            ClassLoader.class, ALL_MEMBERS,
+            Constructor.class, ALL_MEMBERS,
+            Field.class, ALL_MEMBERS,
+            Method.class, ALL_MEMBERS,
+            Module.class, ALL_MEMBERS,
+            System.class, Set.of("security")
+        );
+        methodFilterMap = Map.of();
+    }
+
+    /** Returns the class of the caller of the method calling this method,
+        ignoring frames associated with java.lang.reflect.Method.invoke()
+        and its implementation. */
+    @CallerSensitive
+    @IntrinsicCandidate
+    public static native Class<?> getCallerClass();
+
+    /** Retrieves the access flags written to the class file. For
+        inner classes these flags may differ from those returned by
+        Class.getModifiers(), which searches the InnerClasses
+        attribute to find the source-level access flags. This is used
+        instead of Class.getModifiers() for run-time access checks due
+        to compatibility reasons; see 4471811. Only the values of the
+        low 13 bits (i.e., a mask of 0x1FFF) are guaranteed to be
+        valid. */
+    @IntrinsicCandidate
+    public static native int getClassAccessFlags(Class<?> c);
+
+
+    /**
+     * Ensures that access to a member is granted and throws
+     * IllegalAccessException if not.
+     *
+     * @param currentClass the class performing the access
+     * @param memberClass the declaring class of the member being accessed
+     * @param targetClass the class of target object if accessing instance
+     *                    field or method;
+     *                    or the declaring class if accessing constructor;
+     *                    or null if accessing static field or method
+     * @param modifiers the member's access modifiers
+     * @throws IllegalAccessException if access to member is denied
+     */
+    public static void ensureMemberAccess(Class<?> currentClass,
+                                          Class<?> memberClass,
+                                          Class<?> targetClass,
+                                          int modifiers)
+        throws IllegalAccessException
+    {
+        if (!verifyMemberAccess(currentClass, memberClass, targetClass, modifiers)) {
+            throw newIllegalAccessException(currentClass, memberClass, targetClass, modifiers);
+        }
+    }
+
+    @ForceInline
+    public static void ensureNativeAccess(Class<?> currentClass, Class<?> owner, String methodName) {
+        // if there is no caller class, act as if the call came from unnamed module of system class loader
+        Module module = currentClass != null ?
+                currentClass.getModule() :
+                ClassLoader.getSystemClassLoader().getUnnamedModule();
+        class Holder {
+            static final JavaLangAccess JLA = SharedSecrets.getJavaLangAccess();
+        }
+        Holder.JLA.ensureNativeAccess(module, owner, methodName, currentClass);
+    }
+
+    /**
+     * Verify access to a member and return {@code true} if it is granted.
+     *
+     * @param currentClass the class performing the access
+     * @param memberClass the declaring class of the member being accessed
+     * @param targetClass the class of target object if accessing instance
+     *                    field or method;
+     *                    or the declaring class if accessing constructor;
+     *                    or null if accessing static field or method
+     * @param modifiers the member's access modifiers
+     * @return {@code true} if access to member is granted
+     */
+    public static boolean verifyMemberAccess(Class<?> currentClass,
+                                             Class<?> memberClass,
+                                             Class<?> targetClass,
+                                             int modifiers)
+    {
+        Objects.requireNonNull(currentClass);
+        Objects.requireNonNull(memberClass);
+
+        if (currentClass == memberClass) {
+            // Always succeeds
+            return true;
+        }
+
+        if (!verifyModuleAccess(currentClass.getModule(), memberClass)) {
+            return false;
+        }
+
+        boolean gotIsSameClassPackage = false;
+        boolean isSameClassPackage = false;
+
+        if (!Modifier.isPublic(getClassAccessFlags(memberClass))) {
+            isSameClassPackage = isSameClassPackage(currentClass, memberClass);
+            gotIsSameClassPackage = true;
+            if (!isSameClassPackage) {
+                return false;
+            }
+        }
+
+        // At this point we know that currentClass can access memberClass.
+
+        if (Modifier.isPublic(modifiers)) {
+            return true;
+        }
+
+        // Check for nestmate access if member is private
+        if (Modifier.isPrivate(modifiers)) {
+            // Note: targetClass may be outside the nest, but that is okay
+            //       as long as memberClass is in the nest.
+            if (areNestMates(currentClass, memberClass)) {
+                return true;
+            }
+        }
+
+        boolean successSoFar = false;
+
+        if (Modifier.isProtected(modifiers)) {
+            // See if currentClass is a subclass of memberClass
+            if (isSubclassOf(currentClass, memberClass)) {
+                successSoFar = true;
+            }
+        }
+
+        if (!successSoFar && !Modifier.isPrivate(modifiers)) {
+            if (!gotIsSameClassPackage) {
+                isSameClassPackage = isSameClassPackage(currentClass,
+                                                        memberClass);
+                gotIsSameClassPackage = true;
+            }
+
+            if (isSameClassPackage) {
+                successSoFar = true;
+            }
+        }
+
+        if (!successSoFar) {
+            return false;
+        }
+
+        // Additional test for protected instance members
+        // and protected constructors: JLS 6.6.2
+        if (targetClass != null && Modifier.isProtected(modifiers) &&
+            targetClass != currentClass)
+        {
+            if (!gotIsSameClassPackage) {
+                isSameClassPackage = isSameClassPackage(currentClass, memberClass);
+                gotIsSameClassPackage = true;
+            }
+            if (!isSameClassPackage) {
+                if (!isSubclassOf(targetClass, currentClass)) {
+                    return false;
+                }
+            }
+        }
+
+        return true;
+    }
+
+    /*
+     * Verify if a member is public and memberClass is a public type
+     * in a package that is unconditionally exported and
+     * return {@code true} if it is granted.
+     *
+     * @param memberClass the declaring class of the member being accessed
+     * @param modifiers the member's access modifiers
+     * @return {@code true} if the member is public and in a publicly accessible type
+     */
+    public static boolean verifyPublicMemberAccess(Class<?> memberClass, int modifiers) {
+        Module m = memberClass.getModule();
+        return Modifier.isPublic(modifiers)
+            && m.isExported(memberClass.getPackageName())
+            && Modifier.isPublic(Reflection.getClassAccessFlags(memberClass));
+    }
+
+    /**
+     * Returns {@code true} if memberClass's module exports memberClass's
+     * package to currentModule.
+     */
+    public static boolean verifyModuleAccess(Module currentModule, Class<?> memberClass) {
+        Module memberModule = memberClass.getModule();
+        if (currentModule == memberModule) {
+            // same module (named or unnamed) or both null if called
+            // before module system is initialized, which means we are
+            // dealing with java.base only.
+            return true;
+        } else {
+            String pkg = memberClass.getPackageName();
+            return memberModule.isExported(pkg, currentModule);
+        }
+    }
+
+    /**
+     * Returns true if two classes in the same package.
+     */
+    private static boolean isSameClassPackage(Class<?> c1, Class<?> c2) {
+        if (c1.getClassLoader() != c2.getClassLoader())
+            return false;
+        return Objects.equals(c1.getPackageName(), c2.getPackageName());
+    }
+
+    static boolean isSubclassOf(Class<?> queryClass,
+                                Class<?> ofClass)
+    {
+        while (queryClass != null) {
+            if (queryClass == ofClass) {
+                return true;
+            }
+            queryClass = queryClass.getSuperclass();
+        }
+        return false;
+    }
+
+    // fieldNames must contain only interned Strings
+    public static synchronized void registerFieldsToFilter(Class<?> containingClass,
+                                                           Set<String> fieldNames) {
+        fieldFilterMap =
+            registerFilter(fieldFilterMap, containingClass, fieldNames);
+    }
+
+    // methodNames must contain only interned Strings
+    public static synchronized void registerMethodsToFilter(Class<?> containingClass,
+                                                            Set<String> methodNames) {
+        methodFilterMap =
+            registerFilter(methodFilterMap, containingClass, methodNames);
+    }
+
+    private static Map<Class<?>, Set<String>> registerFilter(Map<Class<?>, Set<String>> map,
+                                                             Class<?> containingClass,
+                                                             Set<String> names) {
+        if (map.get(containingClass) != null) {
+            throw new IllegalArgumentException
+                            ("Filter already registered: " + containingClass);
+        }
+        map = new HashMap<>(map);
+        map.put(containingClass, Set.copyOf(names));
+        return map;
+    }
+
+    public static Field[] filterFields(Class<?> containingClass, Field[] fields) {
+        if (fieldFilterMap == null) {
+            // Bootstrapping
+            return fields;
+        }
+        return (Field[])filter(fields, fieldFilterMap.get(containingClass));
+    }
+
+    public static Method[] filterMethods(Class<?> containingClass, Method[] methods) {
+        if (methodFilterMap == null) {
+            // Bootstrapping
+            return methods;
+        }
+        return (Method[])filter(methods, methodFilterMap.get(containingClass));
+    }
+
+    private static Member[] filter(Member[] members, Set<String> filteredNames) {
+        if ((filteredNames == null) || (members.length == 0)) {
+            return members;
+        }
+        Class<?> memberType = members[0].getClass();
+        if (filteredNames.contains(WILDCARD)) {
+            return (Member[]) Array.newInstance(memberType, 0);
+        }
+        int numNewMembers = 0;
+        for (Member member : members) {
+            if (!filteredNames.contains(member.getName())) {
+                ++numNewMembers;
+            }
+        }
+        Member[] newMembers = (Member[])Array.newInstance(memberType, numNewMembers);
+        int destIdx = 0;
+        for (Member member : members) {
+            if (!filteredNames.contains(member.getName())) {
+                newMembers[destIdx++] = member;
+            }
+        }
+        return newMembers;
+    }
+
+    /**
+     * Tests if the given method is caller-sensitive and the declaring class
+     * is defined by either the bootstrap class loader or platform class loader.
+     */
+    public static boolean isCallerSensitive(Method m) {
+        final ClassLoader loader = m.getDeclaringClass().getClassLoader();
+        if (VM.isSystemDomainLoader(loader)) {
+            return m.isAnnotationPresent(CallerSensitive.class);
+        }
+        return false;
+    }
+
+    /*
+     * Tests if the given Field is a trusted final field and it cannot be
+     * modified reflectively regardless of the value of its accessible flag.
+     */
+    public static boolean isTrustedFinalField(Field field) {
+        return SharedSecrets.getJavaLangReflectAccess().isTrustedFinalField(field);
+    }
+
+    /**
+     * Returns an IllegalAccessException with an exception message based on
+     * the access that is denied.
+     */
+    public static IllegalAccessException newIllegalAccessException(Class<?> currentClass,
+                                                                   Class<?> memberClass,
+                                                                   Class<?> targetClass,
+                                                                   int modifiers)
+    {
+        if (currentClass == null)
+            return newIllegalAccessException(memberClass, modifiers);
+
+        String currentSuffix = "";
+        String memberSuffix = "";
+        Module m1 = currentClass.getModule();
+        if (m1.isNamed())
+            currentSuffix = " (in " + m1 + ")";
+        Module m2 = memberClass.getModule();
+        if (m2.isNamed())
+            memberSuffix = " (in " + m2 + ")";
+
+        String memberPackageName = memberClass.getPackageName();
+
+        String msg = currentClass + currentSuffix + " cannot access ";
+        if (m2.isExported(memberPackageName, m1)) {
+            // module access okay so include the modifiers in the message
+            msg += "a member of " + memberClass + memberSuffix + msgSuffix(modifiers);
+        } else {
+            // module access failed
+            msg += memberClass + memberSuffix+ " because "
+                   + m2 + " does not export " + memberPackageName;
+            if (m2.isNamed()) msg += " to " + m1;
+        }
+
+        return new IllegalAccessException(msg);
+    }
+
+    /**
+     * Returns an IllegalAccessException with an exception message where
+     * there is no caller frame.
+     */
+    private static IllegalAccessException newIllegalAccessException(Class<?> memberClass,
+                                                                    int modifiers)
+    {
+        String memberSuffix = "";
+        Module m2 = memberClass.getModule();
+        if (m2.isNamed())
+            memberSuffix = " (in " + m2 + ")";
+
+        String memberPackageName = memberClass.getPackageName();
+
+        String msg = "JNI attached native thread (null caller frame) cannot access ";
+        if (m2.isExported(memberPackageName)) {
+            // module access okay so include the modifiers in the message
+            msg += "a member of " + memberClass + memberSuffix + msgSuffix(modifiers);
+        } else {
+            // module access failed
+            msg += memberClass + memberSuffix+ " because "
+                + m2 + " does not export " + memberPackageName;
+        }
+
+        return new IllegalAccessException(msg);
+    }
+
+    private static String msgSuffix(int modifiers) {
+        boolean packageAccess =
+            ((Modifier.PRIVATE |
+              Modifier.PROTECTED |
+              Modifier.PUBLIC) & modifiers) == 0;
+        return packageAccess ?
+            " with package access" :
+            " with modifiers \"" + Modifier.toString(modifiers) + "\"";
+    }
+
+    /**
+     * Returns true if {@code currentClass} and {@code memberClass}
+     * are nestmates - that is, if they have the same nesthost as
+     * determined by the VM.
+     */
+    public static native boolean areNestMates(Class<?> currentClass,
+                                              Class<?> memberClass);
+}
diff --git a/tests/test_data/std/jdk/internal/reflect/ReflectionFactory$Config.class b/tests/test_data/std/jdk/internal/reflect/ReflectionFactory$Config.class
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diff --git a/tests/test_data/std/jdk/internal/reflect/ReflectionFactory.java b/tests/test_data/std/jdk/internal/reflect/ReflectionFactory.java
new file mode 100644
index 00000000..2222c810
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/reflect/ReflectionFactory.java
@@ -0,0 +1,636 @@
+/*
+ * Copyright (c) 2001, 2023, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package jdk.internal.reflect;
+
+import java.io.Externalizable;
+import java.io.ObjectInputStream;
+import java.io.ObjectOutputStream;
+import java.io.ObjectStreamClass;
+import java.io.OptionalDataException;
+import java.io.Serializable;
+import java.lang.invoke.MethodHandle;
+import java.lang.invoke.MethodHandles;
+import java.lang.reflect.Constructor;
+import java.lang.reflect.Executable;
+import java.lang.reflect.Field;
+import java.lang.reflect.InvocationTargetException;
+import java.lang.reflect.Method;
+import java.lang.reflect.Modifier;
+import java.security.PrivilegedAction;
+import java.util.Properties;
+import jdk.internal.access.JavaLangReflectAccess;
+import jdk.internal.access.SharedSecrets;
+import jdk.internal.misc.VM;
+import jdk.internal.vm.annotation.Stable;
+import sun.security.action.GetPropertyAction;
+import sun.security.util.SecurityConstants;
+
+/** <P> The master factory for all reflective objects, both those in
+    java.lang.reflect (Fields, Methods, Constructors) as well as their
+    delegates (FieldAccessors, MethodAccessors, ConstructorAccessors).
+    </P>
+
+    <P> The methods in this class are extremely unsafe and can cause
+    subversion of both the language and the verifier. For this reason,
+    they are all instance methods, and access to the constructor of
+    this factory is guarded by a security check, in similar style to
+    {@link jdk.internal.misc.Unsafe}. </P>
+*/
+
+public class ReflectionFactory {
+
+    private static final ReflectionFactory soleInstance = new ReflectionFactory();
+
+
+    /* Method for static class initializer <clinit>, or null */
+    private static volatile Method hasStaticInitializerMethod;
+
+    private final JavaLangReflectAccess langReflectAccess;
+    private ReflectionFactory() {
+        this.langReflectAccess = SharedSecrets.getJavaLangReflectAccess();
+    }
+
+    /**
+     * A convenience class for acquiring the capability to instantiate
+     * reflective objects.  Use this instead of a raw call to {@link
+     * #getReflectionFactory} in order to avoid being limited by the
+     * permissions of your callers.
+     *
+     * <p>An instance of this class can be used as the argument of
+     * <code>AccessController.doPrivileged</code>.
+     */
+    public static final class GetReflectionFactoryAction
+        implements PrivilegedAction<ReflectionFactory> {
+        public ReflectionFactory run() {
+            return getReflectionFactory();
+        }
+    }
+
+    /**
+     * Provides the caller with the capability to instantiate reflective
+     * objects.
+     *
+     * <p> First, if there is a security manager, its
+     * <code>checkPermission</code> method is called with a {@link
+     * java.lang.RuntimePermission} with target
+     * <code>"reflectionFactoryAccess"</code>.  This may result in a
+     * security exception.
+     *
+     * <p> The returned <code>ReflectionFactory</code> object should be
+     * carefully guarded by the caller, since it can be used to read and
+     * write private data and invoke private methods, as well as to load
+     * unverified bytecodes.  It must never be passed to untrusted code.
+     *
+     * @exception SecurityException if a security manager exists and its
+     *             <code>checkPermission</code> method doesn't allow
+     *             access to the RuntimePermission "reflectionFactoryAccess".  */
+    public static ReflectionFactory getReflectionFactory() {
+        @SuppressWarnings("removal")
+        SecurityManager security = System.getSecurityManager();
+        if (security != null) {
+            security.checkPermission(
+                SecurityConstants.REFLECTION_FACTORY_ACCESS_PERMISSION);
+        }
+        return soleInstance;
+    }
+
+    //--------------------------------------------------------------------------
+    //
+    // Routines used by java.lang.reflect
+    //
+    //
+
+    /*
+     * Note: this routine can cause the declaring class for the field
+     * be initialized and therefore must not be called until the
+     * first get/set of this field.
+     * @param field the field
+     * @param override true if caller has overridden accessibility
+     */
+    public FieldAccessor newFieldAccessor(Field field, boolean override) {
+        Field root = langReflectAccess.getRoot(field);
+        if (root != null) {
+            // FieldAccessor will use the root unless the modifiers have
+            // been overridden
+            if (root.getModifiers() == field.getModifiers() || !override) {
+                field = root;
+            }
+        }
+        boolean isFinal = Modifier.isFinal(field.getModifiers());
+        boolean isReadOnly = isFinal && (!override || langReflectAccess.isTrustedFinalField(field));
+        return MethodHandleAccessorFactory.newFieldAccessor(field, isReadOnly);
+    }
+
+    public MethodAccessor newMethodAccessor(Method method, boolean callerSensitive) {
+        // use the root Method that will not cache caller class
+        Method root = langReflectAccess.getRoot(method);
+        if (root != null) {
+            method = root;
+        }
+
+        return MethodHandleAccessorFactory.newMethodAccessor(method, callerSensitive);
+    }
+
+    public ConstructorAccessor newConstructorAccessor(Constructor<?> c) {
+        Class<?> declaringClass = c.getDeclaringClass();
+        if (Modifier.isAbstract(declaringClass.getModifiers())) {
+            return new InstantiationExceptionConstructorAccessorImpl(null);
+        }
+        if (declaringClass == Class.class) {
+            return new InstantiationExceptionConstructorAccessorImpl
+                ("Can not instantiate java.lang.Class");
+        }
+
+        // use the root Constructor that will not cache caller class
+        Constructor<?> root = langReflectAccess.getRoot(c);
+        if (root != null) {
+            c = root;
+        }
+
+        return MethodHandleAccessorFactory.newConstructorAccessor(c);
+    }
+
+    //--------------------------------------------------------------------------
+    //
+    // Routines used by java.lang
+    //
+    //
+
+    /** Creates a new java.lang.reflect.Constructor. Access checks as
+        per java.lang.reflect.AccessibleObject are not overridden. */
+    public Constructor<?> newConstructor(Class<?> declaringClass,
+                                         Class<?>[] parameterTypes,
+                                         Class<?>[] checkedExceptions,
+                                         int modifiers,
+                                         int slot,
+                                         String signature,
+                                         byte[] annotations,
+                                         byte[] parameterAnnotations)
+    {
+        return langReflectAccess.newConstructor(declaringClass,
+                                                parameterTypes,
+                                                checkedExceptions,
+                                                modifiers,
+                                                slot,
+                                                signature,
+                                                annotations,
+                                                parameterAnnotations);
+    }
+
+    /** Gets the ConstructorAccessor object for a
+        java.lang.reflect.Constructor */
+    public ConstructorAccessor getConstructorAccessor(Constructor<?> c) {
+        return langReflectAccess.getConstructorAccessor(c);
+    }
+
+    /** Sets the ConstructorAccessor object for a
+        java.lang.reflect.Constructor */
+    public void setConstructorAccessor(Constructor<?> c,
+                                       ConstructorAccessor accessor)
+    {
+        langReflectAccess.setConstructorAccessor(c, accessor);
+    }
+
+    /** Makes a copy of the passed method. The returned method is a
+        "child" of the passed one; see the comments in Method.java for
+        details. */
+    public Method copyMethod(Method arg) {
+        return langReflectAccess.copyMethod(arg);
+    }
+
+    /** Makes a copy of the passed method. The returned method is NOT
+     * a "child" but a "sibling" of the Method in arg. Should only be
+     * used on non-root methods. */
+    public Method leafCopyMethod(Method arg) {
+        return langReflectAccess.leafCopyMethod(arg);
+    }
+
+
+    /** Makes a copy of the passed field. The returned field is a
+        "child" of the passed one; see the comments in Field.java for
+        details. */
+    public Field copyField(Field arg) {
+        return langReflectAccess.copyField(arg);
+    }
+
+    /** Makes a copy of the passed constructor. The returned
+        constructor is a "child" of the passed one; see the comments
+        in Constructor.java for details. */
+    public <T> Constructor<T> copyConstructor(Constructor<T> arg) {
+        return langReflectAccess.copyConstructor(arg);
+    }
+
+    /** Gets the byte[] that encodes TypeAnnotations on an executable.
+     */
+    public byte[] getExecutableTypeAnnotationBytes(Executable ex) {
+        return langReflectAccess.getExecutableTypeAnnotationBytes(ex);
+    }
+
+    public Class<?>[] getExecutableSharedParameterTypes(Executable ex) {
+        return langReflectAccess.getExecutableSharedParameterTypes(ex);
+    }
+
+    public <T> T newInstance(Constructor<T> ctor, Object[] args, Class<?> caller)
+        throws IllegalAccessException, InstantiationException, InvocationTargetException
+    {
+        return langReflectAccess.newInstance(ctor, args, caller);
+    }
+
+    //--------------------------------------------------------------------------
+    //
+    // Routines used by serialization
+    //
+    //
+
+    public final Constructor<?> newConstructorForExternalization(Class<?> cl) {
+        if (!Externalizable.class.isAssignableFrom(cl)) {
+            return null;
+        }
+        try {
+            Constructor<?> cons = cl.getConstructor();
+            cons.setAccessible(true);
+            return cons;
+        } catch (NoSuchMethodException ex) {
+            return null;
+        }
+    }
+
+    public final Constructor<?> newConstructorForSerialization(Class<?> cl,
+                                                               Constructor<?> constructorToCall)
+    {
+        if (constructorToCall.getDeclaringClass() == cl) {
+            constructorToCall.setAccessible(true);
+            return constructorToCall;
+        }
+        return generateConstructor(cl, constructorToCall);
+    }
+
+    /**
+     * Given a class, determines whether its superclass has
+     * any constructors that are accessible from the class.
+     * This is a special purpose method intended to do access
+     * checking for a serializable class and its superclasses
+     * up to, but not including, the first non-serializable
+     * superclass. This also implies that the superclass is
+     * always non-null, because a serializable class must be a
+     * class (not an interface) and Object is not serializable.
+     *
+     * @param cl the class from which access is checked
+     * @return whether the superclass has a constructor accessible from cl
+     */
+    private boolean superHasAccessibleConstructor(Class<?> cl) {
+        Class<?> superCl = cl.getSuperclass();
+        assert Serializable.class.isAssignableFrom(cl);
+        assert superCl != null;
+        if (packageEquals(cl, superCl)) {
+            // accessible if any non-private constructor is found
+            for (Constructor<?> ctor : superCl.getDeclaredConstructors()) {
+                if ((ctor.getModifiers() & Modifier.PRIVATE) == 0) {
+                    return true;
+                }
+            }
+            if (Reflection.areNestMates(cl, superCl)) {
+                return true;
+            }
+            return false;
+        } else {
+            // sanity check to ensure the parent is protected or public
+            if ((superCl.getModifiers() & (Modifier.PROTECTED | Modifier.PUBLIC)) == 0) {
+                return false;
+            }
+            // accessible if any constructor is protected or public
+            for (Constructor<?> ctor : superCl.getDeclaredConstructors()) {
+                if ((ctor.getModifiers() & (Modifier.PROTECTED | Modifier.PUBLIC)) != 0) {
+                    return true;
+                }
+            }
+            return false;
+        }
+    }
+
+    /**
+     * Returns a constructor that allocates an instance of cl and that then initializes
+     * the instance by calling the no-arg constructor of its first non-serializable
+     * superclass. This is specified in the Serialization Specification, section 3.1,
+     * in step 11 of the deserialization process. If cl is not serializable, returns
+     * cl's no-arg constructor. If no accessible constructor is found, or if the
+     * class hierarchy is somehow malformed (e.g., a serializable class has no
+     * superclass), null is returned.
+     *
+     * @param cl the class for which a constructor is to be found
+     * @return the generated constructor, or null if none is available
+     */
+    public final Constructor<?> newConstructorForSerialization(Class<?> cl) {
+        Class<?> initCl = cl;
+        while (Serializable.class.isAssignableFrom(initCl)) {
+            Class<?> prev = initCl;
+            if ((initCl = initCl.getSuperclass()) == null ||
+                (!disableSerialConstructorChecks() && !superHasAccessibleConstructor(prev))) {
+                return null;
+            }
+        }
+        Constructor<?> constructorToCall;
+        try {
+            constructorToCall = initCl.getDeclaredConstructor();
+            int mods = constructorToCall.getModifiers();
+            if ((mods & Modifier.PRIVATE) != 0 ||
+                    ((mods & (Modifier.PUBLIC | Modifier.PROTECTED)) == 0 &&
+                            !packageEquals(cl, initCl))) {
+                return null;
+            }
+        } catch (NoSuchMethodException ex) {
+            return null;
+        }
+        return generateConstructor(cl, constructorToCall);
+    }
+
+    private final Constructor<?> generateConstructor(Class<?> cl,
+                                                     Constructor<?> constructorToCall) {
+
+        Constructor<?> ctor = newConstructor(constructorToCall.getDeclaringClass(),
+                                             constructorToCall.getParameterTypes(),
+                                             constructorToCall.getExceptionTypes(),
+                                             constructorToCall.getModifiers(),
+                                             langReflectAccess.getConstructorSlot(constructorToCall),
+                                             langReflectAccess.getConstructorSignature(constructorToCall),
+                                             langReflectAccess.getConstructorAnnotations(constructorToCall),
+                                             langReflectAccess.getConstructorParameterAnnotations(constructorToCall));
+        ConstructorAccessor acc;
+        if (useOldSerializableConstructor()) {
+            acc = new SerializationConstructorAccessorGenerator().
+                                generateSerializationConstructor(cl,
+                                                                 constructorToCall.getParameterTypes(),
+                                                                 constructorToCall.getModifiers(),
+                                                                 constructorToCall.getDeclaringClass());
+        } else {
+            acc = MethodHandleAccessorFactory.newSerializableConstructorAccessor(cl, ctor);
+        }
+        setConstructorAccessor(ctor, acc);
+        ctor.setAccessible(true);
+        return ctor;
+    }
+
+    public final MethodHandle readObjectForSerialization(Class<?> cl) {
+        return findReadWriteObjectForSerialization(cl, "readObject", ObjectInputStream.class);
+    }
+
+    public final MethodHandle readObjectNoDataForSerialization(Class<?> cl) {
+        return findReadWriteObjectForSerialization(cl, "readObjectNoData", null);
+    }
+
+    public final MethodHandle writeObjectForSerialization(Class<?> cl) {
+        return findReadWriteObjectForSerialization(cl, "writeObject", ObjectOutputStream.class);
+    }
+
+    private final MethodHandle findReadWriteObjectForSerialization(Class<?> cl,
+                                                                   String methodName,
+                                                                   Class<?> streamClass) {
+        if (!Serializable.class.isAssignableFrom(cl)) {
+            return null;
+        }
+
+        try {
+            Method meth = streamClass == null ? cl.getDeclaredMethod(methodName)
+                    : cl.getDeclaredMethod(methodName, streamClass);
+            int mods = meth.getModifiers();
+            if (meth.getReturnType() != Void.TYPE ||
+                    Modifier.isStatic(mods) ||
+                    !Modifier.isPrivate(mods)) {
+                return null;
+            }
+            meth.setAccessible(true);
+            return MethodHandles.lookup().unreflect(meth);
+        } catch (NoSuchMethodException ex) {
+            return null;
+        } catch (IllegalAccessException ex1) {
+            throw new InternalError("Error", ex1);
+        }
+    }
+
+    /**
+     * Returns a MethodHandle for {@code writeReplace} on the serializable class
+     * or null if no match found.
+     * @param cl a serializable class
+     * @return the {@code writeReplace} MethodHandle or {@code null} if not found
+     */
+    public final MethodHandle writeReplaceForSerialization(Class<?> cl) {
+        return getReplaceResolveForSerialization(cl, "writeReplace");
+    }
+
+    /**
+     * Returns a MethodHandle for {@code readResolve} on the serializable class
+     * or null if no match found.
+     * @param cl a serializable class
+     * @return the {@code writeReplace} MethodHandle or {@code null} if not found
+     */
+    public final MethodHandle readResolveForSerialization(Class<?> cl) {
+        return getReplaceResolveForSerialization(cl, "readResolve");
+    }
+
+    /**
+     * Lookup readResolve or writeReplace on a class with specified
+     * signature constraints.
+     * @param cl a serializable class
+     * @param methodName the method name to find
+     * @return a MethodHandle for the method or {@code null} if not found or
+     *       has the wrong signature.
+     */
+    private MethodHandle getReplaceResolveForSerialization(Class<?> cl,
+                                                           String methodName) {
+        if (!Serializable.class.isAssignableFrom(cl)) {
+            return null;
+        }
+
+        Class<?> defCl = cl;
+        while (defCl != null) {
+            try {
+                Method m = defCl.getDeclaredMethod(methodName);
+                if (m.getReturnType() != Object.class) {
+                    return null;
+                }
+                int mods = m.getModifiers();
+                if (Modifier.isStatic(mods) | Modifier.isAbstract(mods)) {
+                    return null;
+                } else if (Modifier.isPublic(mods) | Modifier.isProtected(mods)) {
+                    // fall through
+                } else if (Modifier.isPrivate(mods) && (cl != defCl)) {
+                    return null;
+                } else if (!packageEquals(cl, defCl)) {
+                    return null;
+                }
+                try {
+                    // Normal return
+                    m.setAccessible(true);
+                    return MethodHandles.lookup().unreflect(m);
+                } catch (IllegalAccessException ex0) {
+                    // setAccessible should prevent IAE
+                    throw new InternalError("Error", ex0);
+                }
+            } catch (NoSuchMethodException ex) {
+                defCl = defCl.getSuperclass();
+            }
+        }
+        return null;
+    }
+
+    /**
+     * Returns true if the given class defines a static initializer method,
+     * false otherwise.
+     */
+    public final boolean hasStaticInitializerForSerialization(Class<?> cl) {
+        Method m = hasStaticInitializerMethod;
+        if (m == null) {
+            try {
+                m = ObjectStreamClass.class.getDeclaredMethod("hasStaticInitializer",
+                        new Class<?>[]{Class.class});
+                m.setAccessible(true);
+                hasStaticInitializerMethod = m;
+            } catch (NoSuchMethodException ex) {
+                throw new InternalError("No such method hasStaticInitializer on "
+                        + ObjectStreamClass.class, ex);
+            }
+        }
+        try {
+            return (Boolean) m.invoke(null, cl);
+        } catch (InvocationTargetException | IllegalAccessException ex) {
+            throw new InternalError("Exception invoking hasStaticInitializer", ex);
+        }
+    }
+
+    /**
+     * Return the accessible constructor for OptionalDataException signaling eof.
+     * @return the eof constructor for OptionalDataException
+     */
+    public final Constructor<OptionalDataException> newOptionalDataExceptionForSerialization() {
+        try {
+            Constructor<OptionalDataException> boolCtor =
+                    OptionalDataException.class.getDeclaredConstructor(Boolean.TYPE);
+            boolCtor.setAccessible(true);
+            return boolCtor;
+        } catch (NoSuchMethodException ex) {
+            throw new InternalError("Constructor not found", ex);
+        }
+    }
+
+    //--------------------------------------------------------------------------
+    //
+    // Internals only below this point
+    //
+
+    /*
+     * If -Djdk.reflect.useNativeAccessorOnly is set, use the native accessor only.
+     * For testing purpose only.
+     */
+    static boolean useNativeAccessorOnly() {
+        return config().useNativeAccessorOnly;
+    }
+
+    static boolean useOldSerializableConstructor() {
+        return config().useOldSerializableConstructor;
+    }
+
+    private static boolean disableSerialConstructorChecks() {
+        return config().disableSerialConstructorChecks;
+    }
+
+    /**
+     * The configuration is lazily initialized after the module system is initialized. The
+     * default config would be used before the proper config is loaded.
+     *
+     * The static initializer of ReflectionFactory is run before the system properties are set up.
+     * The class initialization is caused by the class initialization of java.lang.reflect.Method
+     * (more properly, caused by the class initialization for java.lang.reflect.AccessibleObject)
+     * that happens very early VM startup, initPhase1.
+     */
+    private static @Stable Config config;
+
+    private static final Config DEFAULT_CONFIG = new Config(false, // useNativeAccessorOnly
+                                                            false,  // useOldSerializeableConstructor
+                                                            false); // disableSerialConstructorChecks
+
+    /**
+     * The configurations for the reflection factory. Configurable via
+     * system properties but only available after ReflectionFactory is
+     * loaded during early VM startup.
+     *
+     * Note that the default implementations of the object methods of
+     * this Config record (toString, equals, hashCode) use indy,
+     * which is available to use only after initPhase1. These methods
+     * are currently not called, but should they be needed, a workaround
+     * is to override them.
+     */
+    private record Config(boolean useNativeAccessorOnly,
+                          boolean useOldSerializableConstructor,
+                          boolean disableSerialConstructorChecks) {
+    }
+
+    private static Config config() {
+        Config c = config;
+        if (c != null) {
+            return c;
+        }
+
+        // Always use the default configuration until the module system is initialized.
+        if (!VM.isModuleSystemInited()) {
+            return DEFAULT_CONFIG;
+        }
+
+        return config = loadConfig();
+    }
+
+    private static Config loadConfig() {
+        assert VM.isModuleSystemInited();
+
+        Properties props = GetPropertyAction.privilegedGetProperties();
+        boolean useNativeAccessorOnly =
+            "true".equals(props.getProperty("jdk.reflect.useNativeAccessorOnly"));
+        boolean useOldSerializableConstructor =
+            "true".equals(props.getProperty("jdk.reflect.useOldSerializableConstructor"));
+        boolean disableSerialConstructorChecks =
+            "true".equals(props.getProperty("jdk.disableSerialConstructorChecks"));
+
+        return new Config(useNativeAccessorOnly, useOldSerializableConstructor, disableSerialConstructorChecks);
+    }
+
+    /**
+     * Returns true if classes are defined in the classloader and same package, false
+     * otherwise.
+     * @param cl1 a class
+     * @param cl2 another class
+     * @return true if the two classes are in the same classloader and package
+     */
+    private static boolean packageEquals(Class<?> cl1, Class<?> cl2) {
+        assert !cl1.isArray() && !cl2.isArray();
+
+        if (cl1 == cl2) {
+            return true;
+        }
+
+        return cl1.getClassLoader() == cl2.getClassLoader() &&
+                cl1.getPackageName() == cl2.getPackageName();
+    }
+
+}
diff --git a/tests/test_data/std/jdk/internal/reflect/SerializationConstructorAccessorGenerator$1.class b/tests/test_data/std/jdk/internal/reflect/SerializationConstructorAccessorGenerator$1.class
new file mode 100644
index 0000000000000000000000000000000000000000..f4cb99f58b056cdccd52284b0766be08eebea845
GIT binary patch
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/reflect/SerializationConstructorAccessorGenerator.class b/tests/test_data/std/jdk/internal/reflect/SerializationConstructorAccessorGenerator.class
new file mode 100644
index 0000000000000000000000000000000000000000..040bc1f1c121719db4702a733af245cb603ebe20
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OC=!O;fuMya{{0{5dWkmx

literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/reflect/SerializationConstructorAccessorGenerator.java b/tests/test_data/std/jdk/internal/reflect/SerializationConstructorAccessorGenerator.java
new file mode 100644
index 00000000..1f9645a3
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/reflect/SerializationConstructorAccessorGenerator.java
@@ -0,0 +1,725 @@
+/*
+ * Copyright (c) 2001, 2023, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package jdk.internal.reflect;
+
+import java.security.AccessController;
+import java.security.PrivilegedAction;
+
+
+/** Generator for jdk.internal.reflect.SerializationConstructorAccessorImpl
+    objects using bytecodes to implement a constructor for serialization
+    returned by ReflectionFactory::newConstructorForSerialization. */
+
+class SerializationConstructorAccessorGenerator extends AccessorGenerator {
+
+    private static final short NUM_BASE_CPOOL_ENTRIES   = (short) 12;
+    // One for invoke() plus one for constructor
+    private static final short NUM_METHODS              = (short) 2;
+    // Only used if forSerialization is true
+    private static final short NUM_SERIALIZATION_CPOOL_ENTRIES = (short) 2;
+
+    private static volatile int methodSymnum;
+    private static volatile int constructorSymnum;
+    private static volatile int serializationConstructorSymnum;
+
+    private Class<?>   declaringClass;
+    private Class<?>[] parameterTypes;
+    private Class<?>   returnType;
+    private boolean    isConstructor;
+    private boolean    forSerialization;
+
+    private short targetMethodRef;
+    private short invokeIdx;
+    private short invokeDescriptorIdx;
+    // Constant pool index of CONSTANT_Class_info for first
+    // non-primitive parameter type. Should be incremented by 2.
+    private short nonPrimitiveParametersBaseIdx;
+
+    SerializationConstructorAccessorGenerator() {
+    }
+
+    /** This routine is not thread-safe */
+    public SerializationConstructorAccessorImpl
+    generateSerializationConstructor(Class<?> declaringClass,
+                                     Class<?>[] parameterTypes,
+                                     int modifiers,
+                                     Class<?> targetConstructorClass)
+    {
+        return (SerializationConstructorAccessorImpl)
+            generate(declaringClass,
+                     "<init>",
+                     parameterTypes,
+                     Void.TYPE,
+                     modifiers,
+                     true,
+                     true,
+                     targetConstructorClass);
+    }
+
+    /** This routine is not thread-safe */
+    @SuppressWarnings("removal")
+    private MagicAccessorImpl generate(final Class<?> declaringClass,
+                                       String name,
+                                       Class<?>[] parameterTypes,
+                                       Class<?>   returnType,
+                                       int modifiers,
+                                       boolean isConstructor,
+                                       boolean forSerialization,
+                                       Class<?> serializationTargetClass)
+    {
+        ByteVector vec = ByteVectorFactory.create();
+        asm = new ClassFileAssembler(vec);
+        this.declaringClass = declaringClass;
+        this.parameterTypes = parameterTypes;
+        this.returnType = returnType;
+        this.modifiers = modifiers;
+        this.isConstructor = isConstructor;
+        this.forSerialization = forSerialization;
+
+        asm.emitMagicAndVersion();
+
+        // Constant pool entries:
+        // ( * = Boxing information: optional)
+        // (+  = Shared entries provided by AccessorGenerator)
+        // (^  = Only present if generating SerializationConstructorAccessor)
+        //     [UTF-8] [This class's name]
+        //     [CONSTANT_Class_info] for above
+        //     [UTF-8] "jdk/internal/reflect/{MethodAccessorImpl,ConstructorAccessorImpl,SerializationConstructorAccessorImpl}"
+        //     [CONSTANT_Class_info] for above
+        //     [UTF-8] [Target class's name]
+        //     [CONSTANT_Class_info] for above
+        // ^   [UTF-8] [Serialization: Class's name in which to invoke constructor]
+        // ^   [CONSTANT_Class_info] for above
+        //     [UTF-8] target method or constructor name
+        //     [UTF-8] target method or constructor signature
+        //     [CONSTANT_NameAndType_info] for above
+        //     [CONSTANT_Methodref_info or CONSTANT_InterfaceMethodref_info] for target method
+        //     [UTF-8] "invoke" or "newInstance"
+        //     [UTF-8] invoke or newInstance descriptor
+        //     [UTF-8] descriptor for type of non-primitive parameter 1
+        //     [CONSTANT_Class_info] for type of non-primitive parameter 1
+        //     ...
+        //     [UTF-8] descriptor for type of non-primitive parameter n
+        //     [CONSTANT_Class_info] for type of non-primitive parameter n
+        // +   [UTF-8] "java/lang/Exception"
+        // +   [CONSTANT_Class_info] for above
+        // +   [UTF-8] "java/lang/ClassCastException"
+        // +   [CONSTANT_Class_info] for above
+        // +   [UTF-8] "java/lang/NullPointerException"
+        // +   [CONSTANT_Class_info] for above
+        // +   [UTF-8] "java/lang/IllegalArgumentException"
+        // +   [CONSTANT_Class_info] for above
+        // +   [UTF-8] "java/lang/InvocationTargetException"
+        // +   [CONSTANT_Class_info] for above
+        // +   [UTF-8] "<init>"
+        // +   [UTF-8] "()V"
+        // +   [CONSTANT_NameAndType_info] for above
+        // +   [CONSTANT_Methodref_info] for NullPointerException's constructor
+        // +   [CONSTANT_Methodref_info] for IllegalArgumentException's constructor
+        // +   [UTF-8] "(Ljava/lang/String;)V"
+        // +   [CONSTANT_NameAndType_info] for "<init>(Ljava/lang/String;)V"
+        // +   [CONSTANT_Methodref_info] for IllegalArgumentException's constructor taking a String
+        // +   [UTF-8] "(Ljava/lang/Throwable;)V"
+        // +   [CONSTANT_NameAndType_info] for "<init>(Ljava/lang/Throwable;)V"
+        // +   [CONSTANT_Methodref_info] for InvocationTargetException's constructor
+        // +   [CONSTANT_Methodref_info] for "super()"
+        // +   [UTF-8] "java/lang/Object"
+        // +   [CONSTANT_Class_info] for above
+        // +   [UTF-8] "toString"
+        // +   [UTF-8] "()Ljava/lang/String;"
+        // +   [CONSTANT_NameAndType_info] for "toString()Ljava/lang/String;"
+        // +   [CONSTANT_Methodref_info] for Object's toString method
+        // +   [UTF-8] "Code"
+        // +   [UTF-8] "Exceptions"
+        //  *  [UTF-8] "java/lang/Boolean"
+        //  *  [CONSTANT_Class_info] for above
+        //  *  [UTF-8] "(Z)V"
+        //  *  [CONSTANT_NameAndType_info] for above
+        //  *  [CONSTANT_Methodref_info] for above
+        //  *  [UTF-8] "booleanValue"
+        //  *  [UTF-8] "()Z"
+        //  *  [CONSTANT_NameAndType_info] for above
+        //  *  [CONSTANT_Methodref_info] for above
+        //  *  [UTF-8] "java/lang/Byte"
+        //  *  [CONSTANT_Class_info] for above
+        //  *  [UTF-8] "(B)V"
+        //  *  [CONSTANT_NameAndType_info] for above
+        //  *  [CONSTANT_Methodref_info] for above
+        //  *  [UTF-8] "byteValue"
+        //  *  [UTF-8] "()B"
+        //  *  [CONSTANT_NameAndType_info] for above
+        //  *  [CONSTANT_Methodref_info] for above
+        //  *  [UTF-8] "java/lang/Character"
+        //  *  [CONSTANT_Class_info] for above
+        //  *  [UTF-8] "(C)V"
+        //  *  [CONSTANT_NameAndType_info] for above
+        //  *  [CONSTANT_Methodref_info] for above
+        //  *  [UTF-8] "charValue"
+        //  *  [UTF-8] "()C"
+        //  *  [CONSTANT_NameAndType_info] for above
+        //  *  [CONSTANT_Methodref_info] for above
+        //  *  [UTF-8] "java/lang/Double"
+        //  *  [CONSTANT_Class_info] for above
+        //  *  [UTF-8] "(D)V"
+        //  *  [CONSTANT_NameAndType_info] for above
+        //  *  [CONSTANT_Methodref_info] for above
+        //  *  [UTF-8] "doubleValue"
+        //  *  [UTF-8] "()D"
+        //  *  [CONSTANT_NameAndType_info] for above
+        //  *  [CONSTANT_Methodref_info] for above
+        //  *  [UTF-8] "java/lang/Float"
+        //  *  [CONSTANT_Class_info] for above
+        //  *  [UTF-8] "(F)V"
+        //  *  [CONSTANT_NameAndType_info] for above
+        //  *  [CONSTANT_Methodref_info] for above
+        //  *  [UTF-8] "floatValue"
+        //  *  [UTF-8] "()F"
+        //  *  [CONSTANT_NameAndType_info] for above
+        //  *  [CONSTANT_Methodref_info] for above
+        //  *  [UTF-8] "java/lang/Integer"
+        //  *  [CONSTANT_Class_info] for above
+        //  *  [UTF-8] "(I)V"
+        //  *  [CONSTANT_NameAndType_info] for above
+        //  *  [CONSTANT_Methodref_info] for above
+        //  *  [UTF-8] "intValue"
+        //  *  [UTF-8] "()I"
+        //  *  [CONSTANT_NameAndType_info] for above
+        //  *  [CONSTANT_Methodref_info] for above
+        //  *  [UTF-8] "java/lang/Long"
+        //  *  [CONSTANT_Class_info] for above
+        //  *  [UTF-8] "(J)V"
+        //  *  [CONSTANT_NameAndType_info] for above
+        //  *  [CONSTANT_Methodref_info] for above
+        //  *  [UTF-8] "longValue"
+        //  *  [UTF-8] "()J"
+        //  *  [CONSTANT_NameAndType_info] for above
+        //  *  [CONSTANT_Methodref_info] for above
+        //  *  [UTF-8] "java/lang/Short"
+        //  *  [CONSTANT_Class_info] for above
+        //  *  [UTF-8] "(S)V"
+        //  *  [CONSTANT_NameAndType_info] for above
+        //  *  [CONSTANT_Methodref_info] for above
+        //  *  [UTF-8] "shortValue"
+        //  *  [UTF-8] "()S"
+        //  *  [CONSTANT_NameAndType_info] for above
+        //  *  [CONSTANT_Methodref_info] for above
+
+        short numCPEntries = NUM_BASE_CPOOL_ENTRIES + NUM_COMMON_CPOOL_ENTRIES;
+        boolean usesPrimitives = usesPrimitiveTypes();
+        if (usesPrimitives) {
+            numCPEntries += NUM_BOXING_CPOOL_ENTRIES;
+        }
+        if (forSerialization) {
+            numCPEntries += NUM_SERIALIZATION_CPOOL_ENTRIES;
+        }
+
+        // Add in variable-length number of entries to be able to describe
+        // non-primitive parameter types and checked exceptions.
+        numCPEntries += (short) (2 * numNonPrimitiveParameterTypes());
+
+        asm.emitShort(add(numCPEntries, S1));
+
+        final String generatedName = generateName(isConstructor, forSerialization);
+        asm.emitConstantPoolUTF8(generatedName);
+        asm.emitConstantPoolClass(asm.cpi());
+        thisClass = asm.cpi();
+        if (isConstructor) {
+            if (forSerialization) {
+                asm.emitConstantPoolUTF8
+                    ("jdk/internal/reflect/SerializationConstructorAccessorImpl");
+            } else {
+                asm.emitConstantPoolUTF8("jdk/internal/reflect/ConstructorAccessorImpl");
+            }
+        } else {
+            asm.emitConstantPoolUTF8("jdk/internal/reflect/MethodAccessorImpl");
+        }
+        asm.emitConstantPoolClass(asm.cpi());
+        superClass = asm.cpi();
+        asm.emitConstantPoolUTF8(getClassName(declaringClass, false));
+        asm.emitConstantPoolClass(asm.cpi());
+        targetClass = asm.cpi();
+        short serializationTargetClassIdx = (short) 0;
+        if (forSerialization) {
+            asm.emitConstantPoolUTF8(getClassName(serializationTargetClass, false));
+            asm.emitConstantPoolClass(asm.cpi());
+            serializationTargetClassIdx = asm.cpi();
+        }
+        asm.emitConstantPoolUTF8(name);
+        asm.emitConstantPoolUTF8(buildInternalSignature());
+        asm.emitConstantPoolNameAndType(sub(asm.cpi(), S1), asm.cpi());
+        if (isInterface()) {
+            asm.emitConstantPoolInterfaceMethodref(targetClass, asm.cpi());
+        } else {
+            if (forSerialization) {
+                asm.emitConstantPoolMethodref(serializationTargetClassIdx, asm.cpi());
+            } else {
+                asm.emitConstantPoolMethodref(targetClass, asm.cpi());
+            }
+        }
+        targetMethodRef = asm.cpi();
+        if (isConstructor) {
+            asm.emitConstantPoolUTF8("newInstance");
+        } else {
+            asm.emitConstantPoolUTF8("invoke");
+        }
+        invokeIdx = asm.cpi();
+        if (isConstructor) {
+            asm.emitConstantPoolUTF8("([Ljava/lang/Object;)Ljava/lang/Object;");
+        } else {
+            asm.emitConstantPoolUTF8
+                ("(Ljava/lang/Object;[Ljava/lang/Object;)Ljava/lang/Object;");
+        }
+        invokeDescriptorIdx = asm.cpi();
+
+        // Output class information for non-primitive parameter types
+        nonPrimitiveParametersBaseIdx = add(asm.cpi(), S2);
+        for (int i = 0; i < parameterTypes.length; i++) {
+            Class<?> c = parameterTypes[i];
+            if (!isPrimitive(c)) {
+                asm.emitConstantPoolUTF8(getClassName(c, false));
+                asm.emitConstantPoolClass(asm.cpi());
+            }
+        }
+
+        // Entries common to FieldAccessor, MethodAccessor and ConstructorAccessor
+        emitCommonConstantPoolEntries();
+
+        // Boxing entries
+        if (usesPrimitives) {
+            emitBoxingContantPoolEntries();
+        }
+
+        if (asm.cpi() != numCPEntries) {
+            throw new InternalError("Adjust this code (cpi = " + asm.cpi() +
+                                    ", numCPEntries = " + numCPEntries + ")");
+        }
+
+        // Access flags
+        asm.emitShort(ACC_PUBLIC);
+
+        // This class
+        asm.emitShort(thisClass);
+
+        // Superclass
+        asm.emitShort(superClass);
+
+        // Interfaces count and interfaces
+        asm.emitShort(S0);
+
+        // Fields count and fields
+        asm.emitShort(S0);
+
+        // Methods count and methods
+        asm.emitShort(NUM_METHODS);
+
+        emitConstructor();
+        emitInvoke();
+
+        // Additional attributes (none)
+        asm.emitShort(S0);
+
+        // Load class
+        vec.trim();
+        final byte[] bytes = vec.getData();
+        // Note: the class loader is the only thing that really matters
+        // here -- it's important to get the generated code into the
+        // same namespace as the target class. Since the generated code
+        // is privileged anyway, the protection domain probably doesn't
+        // matter.
+        return AccessController.doPrivileged(
+            new PrivilegedAction<MagicAccessorImpl>() {
+                @SuppressWarnings("deprecation") // Class.newInstance
+                public MagicAccessorImpl run() {
+                        try {
+                        return (MagicAccessorImpl)
+                        ClassDefiner.defineClass
+                                (generatedName,
+                                 bytes,
+                                 0,
+                                 bytes.length,
+                                 declaringClass.getClassLoader()).newInstance();
+                        } catch (InstantiationException | IllegalAccessException e) {
+                            throw new InternalError(e);
+                        }
+                    }
+                });
+    }
+
+    /** This emits the code for either invoke() or newInstance() */
+    private void emitInvoke() {
+        // NOTE that this code will only handle 65535 parameters since we
+        // use the sipush instruction to get the array index on the
+        // operand stack.
+        if (parameterTypes.length > 65535) {
+            throw new InternalError("Can't handle more than 65535 parameters");
+        }
+
+        // Generate code into fresh code buffer
+        ClassFileAssembler cb = new ClassFileAssembler();
+        if (isConstructor) {
+            // 1 incoming argument
+            cb.setMaxLocals(2);
+        } else {
+            // 2 incoming arguments
+            cb.setMaxLocals(3);
+        }
+
+        short illegalArgStartPC = 0;
+
+        if (isConstructor) {
+            // Instantiate target class before continuing
+            // new <target class type>
+            // dup
+            cb.opc_new(targetClass);
+            cb.opc_dup();
+        } else {
+            // Get target object on operand stack if necessary.
+
+            // We need to do an explicit null check here; we won't see
+            // NullPointerExceptions from the invoke bytecode, since it's
+            // covered by an exception handler.
+            if (!isStatic()) {
+                // aload_1
+                // ifnonnull <checkcast label>
+                // new <NullPointerException>
+                // dup
+                // invokespecial <NullPointerException ctor>
+                // athrow
+                // <checkcast label:>
+                // aload_1
+                // checkcast <target class's type>
+                cb.opc_aload_1();
+                Label l = new Label();
+                cb.opc_ifnonnull(l);
+                cb.opc_new(nullPointerClass);
+                cb.opc_dup();
+                cb.opc_invokespecial(nullPointerCtorIdx, 0, 0);
+                cb.opc_athrow();
+                l.bind();
+                illegalArgStartPC = cb.getLength();
+                cb.opc_aload_1();
+                cb.opc_checkcast(targetClass);
+            }
+        }
+
+        // Have to check length of incoming array and throw
+        // IllegalArgumentException if not correct. A concession to the
+        // JCK (isn't clearly specified in the spec): we allow null in the
+        // case where the argument list is zero length.
+        // if no-arg:
+        //   aload_2 | aload_1 (Method | Constructor)
+        //   ifnull <success label>
+        // aload_2 | aload_1
+        // arraylength
+        // sipush <num parameter types>
+        // if_icmpeq <success label>
+        // new <IllegalArgumentException>
+        // dup
+        // invokespecial <IllegalArgumentException ctor>
+        // athrow
+        // <success label:>
+        Label successLabel = new Label();
+        if (parameterTypes.length == 0) {
+            if (isConstructor) {
+                cb.opc_aload_1();
+            } else {
+                cb.opc_aload_2();
+            }
+            cb.opc_ifnull(successLabel);
+        }
+        if (isConstructor) {
+            cb.opc_aload_1();
+        } else {
+            cb.opc_aload_2();
+        }
+        cb.opc_arraylength();
+        cb.opc_sipush((short) parameterTypes.length);
+        cb.opc_if_icmpeq(successLabel);
+        cb.opc_new(illegalArgumentClass);
+        cb.opc_dup();
+        cb.opc_invokespecial(illegalArgumentCtorIdx, 0, 0);
+        cb.opc_athrow();
+        successLabel.bind();
+
+        // Iterate through incoming actual parameters, ensuring that each
+        // is compatible with the formal parameter type, and pushing the
+        // actual on the operand stack (unboxing and widening if necessary).
+
+        short paramTypeCPIdx = nonPrimitiveParametersBaseIdx;
+        Label nextParamLabel = null;
+        byte count = 1; // both invokeinterface opcode's "count" as well as
+        // num args of other invoke bytecodes
+        for (int i = 0; i < parameterTypes.length; i++) {
+            Class<?> paramType = parameterTypes[i];
+            count += (byte) typeSizeInStackSlots(paramType);
+            if (nextParamLabel != null) {
+                nextParamLabel.bind();
+                nextParamLabel = null;
+            }
+            // aload_2 | aload_1
+            // sipush <index>
+            // aaload
+            if (isConstructor) {
+                cb.opc_aload_1();
+            } else {
+                cb.opc_aload_2();
+            }
+            cb.opc_sipush((short) i);
+            cb.opc_aaload();
+            if (isPrimitive(paramType)) {
+                // Unboxing code.
+                // Put parameter into temporary local variable
+                // astore_3 | astore_2
+                if (isConstructor) {
+                    cb.opc_astore_2();
+                } else {
+                    cb.opc_astore_3();
+                }
+
+                // repeat for all possible widening conversions:
+                //   aload_3 | aload_2
+                //   instanceof <primitive boxing type>
+                //   ifeq <next unboxing label>
+                //   aload_3 | aload_2
+                //   checkcast <primitive boxing type> // Note: this is "redundant",
+                //                                     // but necessary for the verifier
+                //   invokevirtual <unboxing method>
+                //   <widening conversion bytecode, if necessary>
+                //   goto <next parameter label>
+                // <next unboxing label:> ...
+                // last unboxing label:
+                //   new <IllegalArgumentException>
+                //   dup
+                //   invokespecial <IllegalArgumentException ctor>
+                //   athrow
+
+                Label l = null; // unboxing label
+                nextParamLabel = new Label();
+
+                for (int j = 0; j < primitiveTypes.length; j++) {
+                    Class<?> c = primitiveTypes[j];
+                    if (canWidenTo(c, paramType)) {
+                        if (l != null) {
+                            l.bind();
+                        }
+                        // Emit checking and unboxing code for this type
+                        if (isConstructor) {
+                            cb.opc_aload_2();
+                        } else {
+                            cb.opc_aload_3();
+                        }
+                        cb.opc_instanceof(indexForPrimitiveType(c));
+                        l = new Label();
+                        cb.opc_ifeq(l);
+                        if (isConstructor) {
+                            cb.opc_aload_2();
+                        } else {
+                            cb.opc_aload_3();
+                        }
+                        cb.opc_checkcast(indexForPrimitiveType(c));
+                        cb.opc_invokevirtual(unboxingMethodForPrimitiveType(c),
+                                             0,
+                                             typeSizeInStackSlots(c));
+                        emitWideningBytecodeForPrimitiveConversion(cb,
+                                                                   c,
+                                                                   paramType);
+                        cb.opc_goto(nextParamLabel);
+                    }
+                }
+
+                if (l == null) {
+                    throw new InternalError
+                        ("Must have found at least identity conversion");
+                }
+
+                // Fell through; given object is null or invalid. According to
+                // the spec, we can throw IllegalArgumentException for both of
+                // these cases.
+
+                l.bind();
+                cb.opc_new(illegalArgumentClass);
+                cb.opc_dup();
+                cb.opc_invokespecial(illegalArgumentCtorIdx, 0, 0);
+                cb.opc_athrow();
+            } else {
+                // Emit appropriate checkcast
+                cb.opc_checkcast(paramTypeCPIdx);
+                paramTypeCPIdx = add(paramTypeCPIdx, S2);
+                // Fall through to next argument
+            }
+        }
+        // Bind last goto if present
+        if (nextParamLabel != null) {
+            nextParamLabel.bind();
+        }
+
+        short invokeStartPC = cb.getLength();
+
+        // OK, ready to perform the invocation.
+        if (isConstructor) {
+            cb.opc_invokespecial(targetMethodRef, count, 0);
+        } else {
+            if (isStatic()) {
+                cb.opc_invokestatic(targetMethodRef,
+                                    count,
+                                    typeSizeInStackSlots(returnType));
+            } else {
+                if (isInterface()) {
+                    cb.opc_invokeinterface(targetMethodRef,
+                                           count,
+                                           count,
+                                           typeSizeInStackSlots(returnType));
+                } else {
+                    cb.opc_invokevirtual(targetMethodRef,
+                                         count,
+                                         typeSizeInStackSlots(returnType));
+                }
+            }
+        }
+
+        short invokeEndPC = cb.getLength();
+
+        if (!isConstructor) {
+            // Box return value if necessary
+            if (isPrimitive(returnType)) {
+                cb.opc_invokestatic(boxingMethodForPrimitiveType(returnType),
+                                    typeSizeInStackSlots(returnType),
+                                    0);
+            } else if (returnType == Void.TYPE) {
+                cb.opc_aconst_null();
+            }
+        }
+        cb.opc_areturn();
+
+        // We generate two exception handlers; one which is responsible
+        // for catching ClassCastException and NullPointerException and
+        // throwing IllegalArgumentException, and the other which catches
+        // all java/lang/Throwable objects thrown from the target method
+        // and wraps them in InvocationTargetExceptions.
+
+        short classCastHandler = cb.getLength();
+
+        // ClassCast, etc. exception handler
+        cb.setStack(1);
+        cb.opc_invokespecial(toStringIdx, 0, 1);
+        cb.opc_new(illegalArgumentClass);
+        cb.opc_dup_x1();
+        cb.opc_swap();
+        cb.opc_invokespecial(illegalArgumentStringCtorIdx, 1, 0);
+        cb.opc_athrow();
+
+        short invocationTargetHandler = cb.getLength();
+
+        // InvocationTargetException exception handler
+        cb.setStack(1);
+        cb.opc_new(invocationTargetClass);
+        cb.opc_dup_x1();
+        cb.opc_swap();
+        cb.opc_invokespecial(invocationTargetCtorIdx, 1, 0);
+        cb.opc_athrow();
+
+        // Generate exception table. We cover the entire code sequence
+        // with an exception handler which catches ClassCastException and
+        // converts it into an IllegalArgumentException.
+
+        ClassFileAssembler exc = new ClassFileAssembler();
+
+        exc.emitShort(illegalArgStartPC);       // start PC
+        exc.emitShort(invokeStartPC);           // end PC
+        exc.emitShort(classCastHandler);        // handler PC
+        exc.emitShort(classCastClass);          // catch type
+
+        exc.emitShort(illegalArgStartPC);       // start PC
+        exc.emitShort(invokeStartPC);           // end PC
+        exc.emitShort(classCastHandler);        // handler PC
+        exc.emitShort(nullPointerClass);        // catch type
+
+        exc.emitShort(invokeStartPC);           // start PC
+        exc.emitShort(invokeEndPC);             // end PC
+        exc.emitShort(invocationTargetHandler); // handler PC
+        exc.emitShort(throwableClass);          // catch type
+
+        emitMethod(invokeIdx, cb.getMaxLocals(), cb, exc,
+                   new short[] { invocationTargetClass });
+    }
+
+    private boolean usesPrimitiveTypes() {
+        // We need to emit boxing/unboxing constant pool information if
+        // the method takes a primitive type for any of its parameters or
+        // returns a primitive value (except void)
+        if (returnType.isPrimitive()) {
+            return true;
+        }
+        for (int i = 0; i < parameterTypes.length; i++) {
+            if (parameterTypes[i].isPrimitive()) {
+                return true;
+            }
+        }
+        return false;
+    }
+
+    private int numNonPrimitiveParameterTypes() {
+        int num = 0;
+        for (int i = 0; i < parameterTypes.length; i++) {
+            if (!parameterTypes[i].isPrimitive()) {
+                ++num;
+            }
+        }
+        return num;
+    }
+
+    private boolean isInterface() {
+        return declaringClass.isInterface();
+    }
+
+    private String buildInternalSignature() {
+        StringBuilder sb = new StringBuilder();
+        sb.append("(");
+        for (int i = 0; i < parameterTypes.length; i++) {
+            sb.append(getClassName(parameterTypes[i], true));
+        }
+        sb.append(")");
+        sb.append(getClassName(returnType, true));
+        return sb.toString();
+    }
+
+    private static synchronized String generateName(boolean isConstructor,
+                                                    boolean forSerialization)
+    {
+        if (isConstructor) {
+            if (forSerialization) {
+                int num = ++serializationConstructorSymnum;
+                return "jdk/internal/reflect/GeneratedSerializationConstructorAccessor" + num;
+            } else {
+                int num = ++constructorSymnum;
+                return "jdk/internal/reflect/GeneratedConstructorAccessor" + num;
+            }
+        } else {
+            int num = ++methodSymnum;
+            return "jdk/internal/reflect/GeneratedMethodAccessor" + num;
+        }
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/reflect/SerializationConstructorAccessorImpl.class b/tests/test_data/std/jdk/internal/reflect/SerializationConstructorAccessorImpl.class
new file mode 100644
index 0000000000000000000000000000000000000000..6412ebaaeecba14b92f2b7d8efbfa89811760bc0
GIT binary patch
literal 403
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zEr@}<mw7Y17v}xr^$kFYVU7fy3~3KL=n~G>tNX&Z$iXRF1irPbV^Mln$I$5L!&Gao
zYagyR50=oqG|t2cp>sT1WY{HK{Aw`gV3ajaDjM&$x}~LGF=0>{$FpX$<Zz>wR+Pia
zYh@QoOr-u1(|BiU!npc(;+T-neG@canKowhmv5f0)uT#}kjdiOLvm$x!h7;6guj%N
c7tpf^339=<4V+?Mu=hP6d>|E}FPLEP2@AAtga7~l

literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/reflect/SerializationConstructorAccessorImpl.java b/tests/test_data/std/jdk/internal/reflect/SerializationConstructorAccessorImpl.java
new file mode 100644
index 00000000..9dbbf0d2
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/reflect/SerializationConstructorAccessorImpl.java
@@ -0,0 +1,45 @@
+/*
+ * Copyright (c) 2001, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package jdk.internal.reflect;
+
+/** <P> Java serialization (in java.io) expects to be able to
+    instantiate a class and invoke a no-arg constructor of that
+    class's first non-Serializable superclass. This is not a valid
+    operation according to the VM specification; one can not (for
+    classes A and B, where B is a subclass of A) write "new B;
+    invokespecial A()" without getting a verification error. </P>
+
+    <P> In all other respects, the bytecode-based reflection framework
+    can be reused for this purpose. This marker class was originally
+    known to the VM and verification disabled for it and all
+    subclasses, but the bug fix for 4486457 necessitated disabling
+    verification for all of the dynamically-generated bytecodes
+    associated with reflection. This class has been left in place to
+    make future debugging easier. </P> */
+
+abstract class SerializationConstructorAccessorImpl
+    extends ConstructorAccessorImpl {
+}
diff --git a/tests/test_data/std/jdk/internal/util/Architecture.class b/tests/test_data/std/jdk/internal/util/Architecture.class
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/util/Architecture.java b/tests/test_data/std/jdk/internal/util/Architecture.java
new file mode 100644
index 00000000..4f193e75
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/util/Architecture.java
@@ -0,0 +1,245 @@
+/*
+ * Copyright (c) 2023, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package jdk.internal.util;
+
+import jdk.internal.vm.annotation.ForceInline;
+
+import java.nio.ByteOrder;
+import java.util.Locale;
+
+/**
+ * System architecture enum values.
+ * Each architecture, except OTHER, has a matching {@code public static boolean isXXX()} method
+ * that is true when running on that architecture.
+ * The values of `OPENJDK_TARGET_CPU` from the build are mapped to the
+ * architecture values.
+ */
+public enum Architecture {
+    /*
+     * An unknown architecture not specifically named.
+     * The addrSize and ByteOrder values are those of the current architecture.
+     */
+    AARCH64(64, ByteOrder.LITTLE_ENDIAN),
+    ARM(32, ByteOrder.LITTLE_ENDIAN),
+    LOONGARCH64(64, ByteOrder.LITTLE_ENDIAN),
+    MIPSEL(32, ByteOrder.LITTLE_ENDIAN),
+    MIPS64EL(64, ByteOrder.LITTLE_ENDIAN),
+    OTHER(is64bit() ? 64 : 32, ByteOrder.nativeOrder()),
+    PPC(32, ByteOrder.BIG_ENDIAN),
+    PPC64(64, ByteOrder.BIG_ENDIAN),
+    PPC64LE(64, ByteOrder.LITTLE_ENDIAN),
+    RISCV64(64, ByteOrder.LITTLE_ENDIAN),
+    S390(64, ByteOrder.BIG_ENDIAN),
+    SPARCV9(64, ByteOrder.BIG_ENDIAN),
+    X86(32, ByteOrder.LITTLE_ENDIAN),
+    X64(64, ByteOrder.LITTLE_ENDIAN),  // Represents AMD64 and X86_64
+    ;
+
+    private final int addrSize;
+    private final ByteOrder byteOrder;
+
+    /**
+     * Construct an Architecture with number of address bits and byte order.
+     * @param addrSize number of address bits, typically 64 or 32
+     * @param byteOrder the byte order, big-endian or little-endian
+     */
+    Architecture(int addrSize, ByteOrder byteOrder) {
+        this.addrSize = addrSize;
+        this.byteOrder = byteOrder;
+    }
+
+    /**
+     * {@return the number of address bits, typically 64 or 32}
+     */
+    public int addressSize() {
+        return addrSize;
+    }
+
+    /**
+     * {@return the byte order, {@link ByteOrder#BIG_ENDIAN} or {@link ByteOrder#LITTLE_ENDIAN}}
+     */
+    public ByteOrder byteOrder() {
+        return byteOrder;
+    }
+
+    /**
+     * {@return the Architecture by name or an alias for the architecture}
+     * The names are mapped to upper case before mapping to an Architecture.
+     * @param archName an Architecture name or alias for the architecture.
+     * @throws IllegalArgumentException if the name is not an alias or an Architecture name
+     */
+    public static Architecture lookupByName(String archName) {
+        archName = archName.toUpperCase(Locale.ROOT); // normalize to uppercase
+        return switch (archName) {
+            case "X86_64", "AMD64" -> X64;
+            case "I386" -> X86;
+            case "S390X" -> S390;
+            default -> Architecture.valueOf(archName);
+        };
+    }
+
+    /**
+     * Returns the Architecture of the built architecture.
+     * Build time names are mapped to respective uppercase enum values.
+     * Names not recognized are mapped to Architecture.OTHER.
+     */
+    private static Architecture initArch(String archName) {
+        try {
+            return lookupByName(archName);
+        } catch (IllegalArgumentException ile) {
+            return Architecture.OTHER;
+        }
+    }
+
+    // Initialize the architecture by mapping aliases and names to the enum values.
+    private static final Architecture CURRENT_ARCH = initArch(PlatformProps.CURRENT_ARCH_STRING);
+
+    /**
+     * {@return {@code true} if the current architecture is X64, Aka amd64}
+     */
+    @ForceInline
+    public static boolean isX64() {
+        return PlatformProps.TARGET_ARCH_IS_X64;
+    }
+
+    /**
+     * {@return {@code true} if the current architecture is X86}
+     */
+    @ForceInline
+    public static boolean isX86() {
+        return PlatformProps.TARGET_ARCH_IS_X86;
+    }
+
+    /**
+     * {@return {@code true} if the current architecture is RISCV64}
+     */
+    @ForceInline
+    public static boolean isRISCV64() {
+        return PlatformProps.TARGET_ARCH_IS_RISCV64;
+    }
+
+    /**
+     * {@return {@code true} if the current architecture is LOONGARCH64}
+     */
+    @ForceInline
+    public static boolean isLOONGARCH64() {
+        return PlatformProps.TARGET_ARCH_IS_LOONGARCH64;
+    }
+
+    /**
+     * {@return {@code true} if the current architecture is S390}
+     */
+    @ForceInline
+    public static boolean isS390() {
+        return PlatformProps.TARGET_ARCH_IS_S390;
+    }
+
+    /**
+     * {@return {@code true} if the current architecture is PPC, big-endian}
+     */
+    @ForceInline
+    public static boolean isPPC() {
+        return PlatformProps.TARGET_ARCH_IS_PPC;
+    }
+
+    /**
+     * {@return {@code true} if the current architecture is PPC64, big-endian}
+     */
+    @ForceInline
+    public static boolean isPPC64() {
+        return PlatformProps.TARGET_ARCH_IS_PPC64;
+    }
+
+    /**
+     * {@return {@code true} if the current architecture is PPC64, little-endian}
+     */
+    @ForceInline
+    public static boolean isPPC64LE() {
+        return PlatformProps.TARGET_ARCH_IS_PPC64LE;
+    }
+
+    /**
+     * {@return {@code true} if the current architecture is ARM}
+     */
+    @ForceInline
+    public static boolean isARM() {
+        return PlatformProps.TARGET_ARCH_IS_ARM;
+    }
+
+    /**
+     * {@return {@code true} if the current architecture is AARCH64}
+     */
+    @ForceInline
+    public static boolean isAARCH64() {
+        return PlatformProps.TARGET_ARCH_IS_AARCH64;
+    }
+
+    /**
+     * {@return {@code true} if the current architecture is MIPSEL}
+     */
+    @ForceInline
+    public static boolean isMIPSEL() {
+        return PlatformProps.TARGET_ARCH_IS_MIPSEL;
+    }
+
+    /**
+     * {@return {@code true} if the current architecture is MIPS64EL}
+     */
+    @ForceInline
+    public static boolean isMIPS64EL() {
+        return PlatformProps.TARGET_ARCH_IS_MIPS64EL;
+    }
+
+    /**
+     * {@return {@code true} if the current architecture is SPARCV9}
+     */
+    @ForceInline
+    public static boolean isSPARCV9() {
+        return PlatformProps.TARGET_ARCH_IS_SPARCV9;
+    }
+
+    /**
+     * {@return the current architecture}
+     */
+    public static Architecture current() {
+        return CURRENT_ARCH;
+    }
+
+    /**
+     * {@return {@code true} if the current architecture is 64-bit}
+     */
+    @ForceInline
+    public static boolean is64bit() {
+        return PlatformProps.TARGET_ARCH_BITS == 64;
+    }
+
+    /**
+     * {@return {@code true} if the current architecture is little-endian}
+     */
+    @ForceInline
+    public static boolean isLittleEndian() {
+        return PlatformProps.TARGET_ARCH_LITTLE_ENDIAN;
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/util/ArraysSupport.class b/tests/test_data/std/jdk/internal/util/ArraysSupport.class
new file mode 100644
index 0000000000000000000000000000000000000000..6a387ea9ce7cf229193fcc83f828f888a65c8d1f
GIT binary patch
literal 13180
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diff --git a/tests/test_data/std/jdk/internal/util/ArraysSupport.java b/tests/test_data/std/jdk/internal/util/ArraysSupport.java
new file mode 100644
index 00000000..a24f8389
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/util/ArraysSupport.java
@@ -0,0 +1,971 @@
+/*
+ * Copyright (c) 2015, 2024, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package jdk.internal.util;
+
+import java.util.Arrays;
+import java.util.Collection;
+import java.util.Objects;
+
+import jdk.internal.access.JavaLangAccess;
+import jdk.internal.access.SharedSecrets;
+import jdk.internal.misc.Unsafe;
+import jdk.internal.vm.annotation.IntrinsicCandidate;
+
+/**
+ * Utility methods to work with arrays.  This includes a set of methods
+ * to find a mismatch between two primitive arrays.  Also included is
+ * a method to calculate the new length of an array to be reallocated.
+ *
+ * <p>Array equality and lexicographical comparison can be built on top of
+ * array mismatch functionality.
+ *
+ * <p>The mismatch method implementation, {@link #vectorizedMismatch}, leverages
+ * vector-based techniques to access and compare the contents of two arrays.
+ * The Java implementation uses {@code Unsafe.getLongUnaligned} to access the
+ * content of an array, thus access is supported on platforms that do not
+ * support unaligned access.  For a byte[] array, 8 bytes (64 bits) can be
+ * accessed and compared as a unit rather than individually, which increases
+ * the performance when the method is compiled by the HotSpot VM.  On supported
+ * platforms the mismatch implementation is intrinsified to leverage SIMD
+ * instructions.  So for a byte[] array, 16 bytes (128 bits), 32 bytes
+ * (256 bits), and perhaps in the future even 64 bytes (512 bits), platform
+ * permitting, can be accessed and compared as a unit, which further increases
+ * the performance over the Java implementation.
+ *
+ * <p>None of the mismatch methods perform array bounds checks.  It is the
+ * responsibility of the caller (direct or otherwise) to perform such checks
+ * before calling this method.
+ */
+public class ArraysSupport {
+    static final Unsafe U = Unsafe.getUnsafe();
+
+    private static final boolean BIG_ENDIAN = U.isBigEndian();
+
+    public static final int LOG2_ARRAY_BOOLEAN_INDEX_SCALE = exactLog2(Unsafe.ARRAY_BOOLEAN_INDEX_SCALE);
+    public static final int LOG2_ARRAY_BYTE_INDEX_SCALE = exactLog2(Unsafe.ARRAY_BYTE_INDEX_SCALE);
+    public static final int LOG2_ARRAY_CHAR_INDEX_SCALE = exactLog2(Unsafe.ARRAY_CHAR_INDEX_SCALE);
+    public static final int LOG2_ARRAY_SHORT_INDEX_SCALE = exactLog2(Unsafe.ARRAY_SHORT_INDEX_SCALE);
+    public static final int LOG2_ARRAY_INT_INDEX_SCALE = exactLog2(Unsafe.ARRAY_INT_INDEX_SCALE);
+    public static final int LOG2_ARRAY_LONG_INDEX_SCALE = exactLog2(Unsafe.ARRAY_LONG_INDEX_SCALE);
+    public static final int LOG2_ARRAY_FLOAT_INDEX_SCALE = exactLog2(Unsafe.ARRAY_FLOAT_INDEX_SCALE);
+    public static final int LOG2_ARRAY_DOUBLE_INDEX_SCALE = exactLog2(Unsafe.ARRAY_DOUBLE_INDEX_SCALE);
+
+    private static final int LOG2_BYTE_BIT_SIZE = exactLog2(Byte.SIZE);
+
+    private static int exactLog2(int scale) {
+        if ((scale & (scale - 1)) != 0)
+            throw new Error("data type scale not a power of two");
+        return Integer.numberOfTrailingZeros(scale);
+    }
+
+    private ArraysSupport() {}
+
+    /**
+     * Find the relative index of the first mismatching pair of elements in two
+     * primitive arrays of the same component type.  Pairs of elements will be
+     * tested in order relative to given offsets into both arrays.
+     *
+     * <p>This method does not perform type checks or bounds checks.  It is the
+     * responsibility of the caller to perform such checks before calling this
+     * method.
+     *
+     * <p>The given offsets, in bytes, need not be aligned according to the
+     * given log<sub>2</sub> size the array elements.  More specifically, an
+     * offset modulus the size need not be zero.
+     *
+     * @param a the first array to be tested for mismatch, or {@code null} for
+     * direct memory access
+     * @param aOffset the relative offset, in bytes, from the base address of
+     * the first array to test from, otherwise if the first array is
+     * {@code null}, an absolute address pointing to the first element to test.
+     * @param b the second array to be tested for mismatch, or {@code null} for
+     * direct memory access
+     * @param bOffset the relative offset, in bytes, from the base address of
+     * the second array to test from, otherwise if the second array is
+     * {@code null}, an absolute address pointing to the first element to test.
+     * @param length the number of array elements to test
+     * @param log2ArrayIndexScale log<sub>2</sub> of the array index scale, that
+     * corresponds to the size, in bytes, of an array element.
+     * @return if a mismatch is found a relative index, between 0 (inclusive)
+     * and {@code length} (exclusive), of the first mismatching pair of elements
+     * in the two arrays.  Otherwise, if a mismatch is not found the bitwise
+     * compliment of the number of remaining pairs of elements to be checked in
+     * the tail of the two arrays.
+     */
+    @IntrinsicCandidate
+    public static int vectorizedMismatch(Object a, long aOffset,
+                                         Object b, long bOffset,
+                                         int length,
+                                         int log2ArrayIndexScale) {
+        // assert a.getClass().isArray();
+        // assert b.getClass().isArray();
+        // assert 0 <= length <= sizeOf(a)
+        // assert 0 <= length <= sizeOf(b)
+        // assert 0 <= log2ArrayIndexScale <= 3
+
+        int log2ValuesPerWidth = LOG2_ARRAY_LONG_INDEX_SCALE - log2ArrayIndexScale;
+        int wi = 0;
+        for (; wi < length >> log2ValuesPerWidth; wi++) {
+            long bi = ((long) wi) << LOG2_ARRAY_LONG_INDEX_SCALE;
+            long av = U.getLongUnaligned(a, aOffset + bi);
+            long bv = U.getLongUnaligned(b, bOffset + bi);
+            if (av != bv) {
+                long x = av ^ bv;
+                int o = BIG_ENDIAN
+                        ? Long.numberOfLeadingZeros(x) >> (LOG2_BYTE_BIT_SIZE + log2ArrayIndexScale)
+                        : Long.numberOfTrailingZeros(x) >> (LOG2_BYTE_BIT_SIZE + log2ArrayIndexScale);
+                return (wi << log2ValuesPerWidth) + o;
+            }
+        }
+
+        // Calculate the tail of remaining elements to check
+        int tail = length - (wi << log2ValuesPerWidth);
+
+        if (log2ArrayIndexScale < LOG2_ARRAY_INT_INDEX_SCALE) {
+            int wordTail = 1 << (LOG2_ARRAY_INT_INDEX_SCALE - log2ArrayIndexScale);
+            // Handle 4 bytes or 2 chars in the tail using int width
+            if (tail >= wordTail) {
+                long bi = ((long) wi) << LOG2_ARRAY_LONG_INDEX_SCALE;
+                int av = U.getIntUnaligned(a, aOffset + bi);
+                int bv = U.getIntUnaligned(b, bOffset + bi);
+                if (av != bv) {
+                    int x = av ^ bv;
+                    int o = BIG_ENDIAN
+                            ? Integer.numberOfLeadingZeros(x) >> (LOG2_BYTE_BIT_SIZE + log2ArrayIndexScale)
+                            : Integer.numberOfTrailingZeros(x) >> (LOG2_BYTE_BIT_SIZE + log2ArrayIndexScale);
+                    return (wi << log2ValuesPerWidth) + o;
+                }
+                tail -= wordTail;
+            }
+            return ~tail;
+        }
+        else {
+            return ~tail;
+        }
+    }
+
+    /**
+     * Calculates the hash code for the subrange of an integer array.
+     *
+     * <p> This method does not perform type checks or bounds checks. It is the
+     * responsibility of the caller to perform such checks before calling this
+     * method.
+     *
+     * @param a the array
+     * @param fromIndex the first index of the subrange of the array
+     * @param length the number of elements in the subrange
+     * @param initialValue the initial hash value, typically 0 or 1
+     *
+     * @return the calculated hash value
+     */
+    public static int hashCode(int[] a, int fromIndex, int length, int initialValue) {
+        return switch (length) {
+            case 0 -> initialValue;
+            case 1 -> 31 * initialValue + a[fromIndex];
+            default -> vectorizedHashCode(a, fromIndex, length, initialValue, T_INT);
+        };
+    }
+
+    /**
+     * Calculates the hash code for the subrange of a short array.
+     *
+     * <p> This method does not perform type checks or bounds checks. It is the
+     * responsibility of the caller to perform such checks before calling this
+     * method.
+     *
+     * @param a the array
+     * @param fromIndex the first index of the subrange of the array
+     * @param length the number of elements in the subrange
+     * @param initialValue the initial hash value, typically 0 or 1
+     *
+     * @return the calculated hash value
+     */
+    public static int hashCode(short[] a, int fromIndex, int length, int initialValue) {
+        return switch (length) {
+            case 0 -> initialValue;
+            case 1 -> 31 * initialValue + a[fromIndex];
+            default -> vectorizedHashCode(a, fromIndex, length, initialValue, T_SHORT);
+        };
+    }
+
+    /**
+     * Calculates the hash code for the subrange of a char array.
+     *
+     * <p> This method does not perform type checks or bounds checks. It is the
+     * responsibility of the caller to perform such checks before calling this
+     * method.
+     *
+     * @param a the array
+     * @param fromIndex the first index of the subrange of the array
+     * @param length the number of elements in the subrange
+     * @param initialValue the initial hash value, typically 0 or 1
+     *
+     * @return the calculated hash value
+     */
+    public static int hashCode(char[] a, int fromIndex, int length, int initialValue) {
+        return switch (length) {
+            case 0 -> initialValue;
+            case 1 -> 31 * initialValue + a[fromIndex];
+            default -> vectorizedHashCode(a, fromIndex, length, initialValue, T_CHAR);
+        };
+    }
+
+    /**
+     * Calculates the hash code for the subrange of a byte array.
+     *
+     * <p> This method does not perform type checks or bounds checks. It is the
+     * responsibility of the caller to perform such checks before calling this
+     * method.
+     *
+     * @param a the array
+     * @param fromIndex the first index of the subrange of the array
+     * @param length the number of elements in the subrange
+     * @param initialValue the initial hash value, typically 0 or 1
+     *
+     * @return the calculated hash value
+     */
+    public static int hashCode(byte[] a, int fromIndex, int length, int initialValue) {
+        return switch (length) {
+            case 0 -> initialValue;
+            case 1 -> 31 * initialValue + a[fromIndex];
+            default -> vectorizedHashCode(a, fromIndex, length, initialValue, T_BYTE);
+        };
+    }
+
+    /**
+     * Calculates the hash code for the subrange of a byte array whose elements
+     * are treated as unsigned bytes.
+     *
+     * <p> This method does not perform type checks or bounds checks. It is the
+     * responsibility of the caller to perform such checks before calling this
+     * method.
+     *
+     * @param a the array
+     * @param fromIndex the first index of the subrange of the array
+     * @param length the number of elements in the subrange
+     * @param initialValue the initial hash value, typically 0 or 1
+     *
+     * @return the calculated hash value
+     */
+    public static int hashCodeOfUnsigned(byte[] a, int fromIndex, int length, int initialValue) {
+        return switch (length) {
+            case 0 -> initialValue;
+            case 1 -> 31 * initialValue + Byte.toUnsignedInt(a[fromIndex]);
+            default -> vectorizedHashCode(a, fromIndex, length, initialValue, T_BOOLEAN);
+        };
+    }
+
+    /**
+     * Calculates the hash code for the subrange of a byte array whose contents
+     * are treated as UTF-16 chars.
+     *
+     * <p> This method does not perform type checks or bounds checks. It is the
+     * responsibility of the caller to perform such checks before calling this
+     * method.
+     *
+     * <p> {@code fromIndex} and {@code length} must be scaled down to char
+     * indexes.
+     *
+     * @param a the array
+     * @param fromIndex the first index of a char in the subrange of the array
+     * @param length the number of chars in the subrange
+     * @param initialValue the initial hash value, typically 0 or 1
+     *
+     * @return the calculated hash value
+     */
+    public static int hashCodeOfUTF16(byte[] a, int fromIndex, int length, int initialValue) {
+        return switch (length) {
+            case 0 -> initialValue;
+            case 1 -> 31 * initialValue + JLA.getUTF16Char(a, fromIndex);
+            default -> vectorizedHashCode(a, fromIndex, length, initialValue, T_CHAR);
+        };
+    }
+
+    /**
+     * Calculates the hash code for the subrange of an object array.
+     *
+     * <p> This method does not perform type checks or bounds checks. It is the
+     * responsibility of the caller to perform such checks before calling this
+     * method.
+     *
+     * @param a the array
+     * @param fromIndex the first index of the subrange of the array
+     * @param length the number of elements in the subrange
+     * @param initialValue the initial hash value, typically 0 or 1
+     *
+     * @return the calculated hash value
+     */
+    public static int hashCode(Object[] a, int fromIndex, int length, int initialValue) {
+        int result = initialValue;
+        int end = fromIndex + length;
+        for (int i = fromIndex; i < end; i++) {
+            result = 31 * result + Objects.hashCode(a[i]);
+        }
+        return result;
+    }
+
+    // Possible values for the type operand of the NEWARRAY instruction.
+    // See https://docs.oracle.com/javase/specs/jvms/se9/html/jvms-6.html#jvms-6.5.newarray.
+
+    private static final int T_BOOLEAN = 4;
+    private static final int T_CHAR = 5;
+    private static final int T_FLOAT = 6;
+    private static final int T_DOUBLE = 7;
+    private static final int T_BYTE = 8;
+    private static final int T_SHORT = 9;
+    private static final int T_INT = 10;
+    private static final int T_LONG = 11;
+
+    /**
+     * Calculate the hash code for an array in a way that enables efficient
+     * vectorization.
+     *
+     * <p>This method does not perform type checks or bounds checks.  It is the
+     * responsibility of the caller to perform such checks before calling this
+     * method.
+     *
+     * @param array for which to calculate hash code
+     * @param fromIndex start index, scaled to basicType
+     * @param length number of elements to include in the hash
+     * @param initialValue the initial value for the hash (typically constant 0 or 1)
+     * @param basicType type constant denoting how to interpret the array content.
+     *                  T_BOOLEAN is used to signify unsigned bytes, and T_CHAR might be used
+     *                  even if array is a byte[].
+     * @implNote currently basicType must be constant at the call site for this method
+     *           to be intrinsified.
+     *
+     * @return the calculated hash value
+     */
+    @IntrinsicCandidate
+    private static int vectorizedHashCode(Object array, int fromIndex, int length, int initialValue,
+                                          int basicType) {
+        return switch (basicType) {
+            case T_BOOLEAN -> unsignedHashCode(initialValue, (byte[]) array, fromIndex, length);
+            case T_CHAR -> array instanceof byte[]
+                    ? utf16hashCode(initialValue, (byte[]) array, fromIndex, length)
+                    : hashCode(initialValue, (char[]) array, fromIndex, length);
+            case T_BYTE -> hashCode(initialValue, (byte[]) array, fromIndex, length);
+            case T_SHORT -> hashCode(initialValue, (short[]) array, fromIndex, length);
+            case T_INT -> hashCode(initialValue, (int[]) array, fromIndex, length);
+                default -> throw new IllegalArgumentException("unrecognized basic type: " + basicType);
+        };
+    }
+
+    private static int unsignedHashCode(int result, byte[] a, int fromIndex, int length) {
+        int end = fromIndex + length;
+        for (int i = fromIndex; i < end; i++) {
+            result = 31 * result + Byte.toUnsignedInt(a[i]);
+        }
+        return result;
+    }
+
+    private static int hashCode(int result, byte[] a, int fromIndex, int length) {
+        int end = fromIndex + length;
+        for (int i = fromIndex; i < end; i++) {
+            result = 31 * result + a[i];
+        }
+        return result;
+    }
+
+    private static int hashCode(int result, char[] a, int fromIndex, int length) {
+        int end = fromIndex + length;
+        for (int i = fromIndex; i < end; i++) {
+            result = 31 * result + a[i];
+        }
+        return result;
+    }
+
+    private static int hashCode(int result, short[] a, int fromIndex, int length) {
+        int end = fromIndex + length;
+        for (int i = fromIndex; i < end; i++) {
+            result = 31 * result + a[i];
+        }
+        return result;
+    }
+
+    private static int hashCode(int result, int[] a, int fromIndex, int length) {
+        int end = fromIndex + length;
+        for (int i = fromIndex; i < end; i++) {
+            result = 31 * result + a[i];
+        }
+        return result;
+    }
+
+    private static final JavaLangAccess JLA = SharedSecrets.getJavaLangAccess();
+    /*
+     * fromIndex and length must be scaled to char indexes.
+     */
+    private static int utf16hashCode(int result, byte[] value, int fromIndex, int length) {
+        int end = fromIndex + length;
+        for (int i = fromIndex; i < end; i++) {
+            result = 31 * result + JLA.getUTF16Char(value, i);
+        }
+        return result;
+    }
+
+    // Booleans
+    // Each boolean element takes up one byte
+
+    public static int mismatch(boolean[] a,
+                               boolean[] b,
+                               int length) {
+        int i = 0;
+        if (length > 7) {
+            if (a[0] != b[0])
+                return 0;
+            i = vectorizedMismatch(
+                    a, Unsafe.ARRAY_BOOLEAN_BASE_OFFSET,
+                    b, Unsafe.ARRAY_BOOLEAN_BASE_OFFSET,
+                    length, LOG2_ARRAY_BOOLEAN_INDEX_SCALE);
+            if (i >= 0)
+                return i;
+            i = length - ~i;
+        }
+        for (; i < length; i++) {
+            if (a[i] != b[i])
+                return i;
+        }
+        return -1;
+    }
+
+    public static int mismatch(boolean[] a, int aFromIndex,
+                               boolean[] b, int bFromIndex,
+                               int length) {
+        int i = 0;
+        if (length > 7) {
+            if (a[aFromIndex] != b[bFromIndex])
+                return 0;
+            int aOffset = Unsafe.ARRAY_BOOLEAN_BASE_OFFSET + aFromIndex;
+            int bOffset = Unsafe.ARRAY_BOOLEAN_BASE_OFFSET + bFromIndex;
+            i = vectorizedMismatch(
+                    a, aOffset,
+                    b, bOffset,
+                    length, LOG2_ARRAY_BOOLEAN_INDEX_SCALE);
+            if (i >= 0)
+                return i;
+            i = length - ~i;
+        }
+        for (; i < length; i++) {
+            if (a[aFromIndex + i] != b[bFromIndex + i])
+                return i;
+        }
+        return -1;
+    }
+
+
+    // Bytes
+
+    /**
+     * Find the index of a mismatch between two arrays.
+     *
+     * <p>This method does not perform bounds checks. It is the responsibility
+     * of the caller to perform such bounds checks before calling this method.
+     *
+     * @param a the first array to be tested for a mismatch
+     * @param b the second array to be tested for a mismatch
+     * @param length the number of bytes from each array to check
+     * @return the index of a mismatch between the two arrays, otherwise -1 if
+     * no mismatch.  The index will be within the range of (inclusive) 0 to
+     * (exclusive) the smaller of the two array lengths.
+     */
+    public static int mismatch(byte[] a,
+                               byte[] b,
+                               int length) {
+        // ISSUE: defer to index receiving methods if performance is good
+        // assert length <= a.length
+        // assert length <= b.length
+
+        int i = 0;
+        if (length > 7) {
+            if (a[0] != b[0])
+                return 0;
+            i = vectorizedMismatch(
+                    a, Unsafe.ARRAY_BYTE_BASE_OFFSET,
+                    b, Unsafe.ARRAY_BYTE_BASE_OFFSET,
+                    length, LOG2_ARRAY_BYTE_INDEX_SCALE);
+            if (i >= 0)
+                return i;
+            // Align to tail
+            i = length - ~i;
+//            assert i >= 0 && i <= 7;
+        }
+        // Tail < 8 bytes
+        for (; i < length; i++) {
+            if (a[i] != b[i])
+                return i;
+        }
+        return -1;
+    }
+
+    /**
+     * Find the relative index of a mismatch between two arrays starting from
+     * given indexes.
+     *
+     * <p>This method does not perform bounds checks. It is the responsibility
+     * of the caller to perform such bounds checks before calling this method.
+     *
+     * @param a the first array to be tested for a mismatch
+     * @param aFromIndex the index of the first element (inclusive) in the first
+     * array to be compared
+     * @param b the second array to be tested for a mismatch
+     * @param bFromIndex the index of the first element (inclusive) in the
+     * second array to be compared
+     * @param length the number of bytes from each array to check
+     * @return the relative index of a mismatch between the two arrays,
+     * otherwise -1 if no mismatch.  The index will be within the range of
+     * (inclusive) 0 to (exclusive) the smaller of the two array bounds.
+     */
+    public static int mismatch(byte[] a, int aFromIndex,
+                               byte[] b, int bFromIndex,
+                               int length) {
+        // assert 0 <= aFromIndex < a.length
+        // assert 0 <= aFromIndex + length <= a.length
+        // assert 0 <= bFromIndex < b.length
+        // assert 0 <= bFromIndex + length <= b.length
+        // assert length >= 0
+
+        int i = 0;
+        if (length > 7) {
+            if (a[aFromIndex] != b[bFromIndex])
+                return 0;
+            int aOffset = Unsafe.ARRAY_BYTE_BASE_OFFSET + aFromIndex;
+            int bOffset = Unsafe.ARRAY_BYTE_BASE_OFFSET + bFromIndex;
+            i = vectorizedMismatch(
+                    a, aOffset,
+                    b, bOffset,
+                    length, LOG2_ARRAY_BYTE_INDEX_SCALE);
+            if (i >= 0)
+                return i;
+            i = length - ~i;
+        }
+        for (; i < length; i++) {
+            if (a[aFromIndex + i] != b[bFromIndex + i])
+                return i;
+        }
+        return -1;
+    }
+
+
+    // Chars
+
+    public static int mismatch(char[] a,
+                               char[] b,
+                               int length) {
+        int i = 0;
+        if (length > 3) {
+            if (a[0] != b[0])
+                return 0;
+            i = vectorizedMismatch(
+                    a, Unsafe.ARRAY_CHAR_BASE_OFFSET,
+                    b, Unsafe.ARRAY_CHAR_BASE_OFFSET,
+                    length, LOG2_ARRAY_CHAR_INDEX_SCALE);
+            if (i >= 0)
+                return i;
+            i = length - ~i;
+        }
+        for (; i < length; i++) {
+            if (a[i] != b[i])
+                return i;
+        }
+        return -1;
+    }
+
+    public static int mismatch(char[] a, int aFromIndex,
+                               char[] b, int bFromIndex,
+                               int length) {
+        int i = 0;
+        if (length > 3) {
+            if (a[aFromIndex] != b[bFromIndex])
+                return 0;
+            int aOffset = Unsafe.ARRAY_CHAR_BASE_OFFSET + (aFromIndex << LOG2_ARRAY_CHAR_INDEX_SCALE);
+            int bOffset = Unsafe.ARRAY_CHAR_BASE_OFFSET + (bFromIndex << LOG2_ARRAY_CHAR_INDEX_SCALE);
+            i = vectorizedMismatch(
+                    a, aOffset,
+                    b, bOffset,
+                    length, LOG2_ARRAY_CHAR_INDEX_SCALE);
+            if (i >= 0)
+                return i;
+            i = length - ~i;
+        }
+        for (; i < length; i++) {
+            if (a[aFromIndex + i] != b[bFromIndex + i])
+                return i;
+        }
+        return -1;
+    }
+
+
+    // Shorts
+
+    public static int mismatch(short[] a,
+                               short[] b,
+                               int length) {
+        int i = 0;
+        if (length > 3) {
+            if (a[0] != b[0])
+                return 0;
+            i = vectorizedMismatch(
+                    a, Unsafe.ARRAY_SHORT_BASE_OFFSET,
+                    b, Unsafe.ARRAY_SHORT_BASE_OFFSET,
+                    length, LOG2_ARRAY_SHORT_INDEX_SCALE);
+            if (i >= 0)
+                return i;
+            i = length - ~i;
+        }
+        for (; i < length; i++) {
+            if (a[i] != b[i])
+                return i;
+        }
+        return -1;
+    }
+
+    public static int mismatch(short[] a, int aFromIndex,
+                               short[] b, int bFromIndex,
+                               int length) {
+        int i = 0;
+        if (length > 3) {
+            if (a[aFromIndex] != b[bFromIndex])
+                return 0;
+            int aOffset = Unsafe.ARRAY_SHORT_BASE_OFFSET + (aFromIndex << LOG2_ARRAY_SHORT_INDEX_SCALE);
+            int bOffset = Unsafe.ARRAY_SHORT_BASE_OFFSET + (bFromIndex << LOG2_ARRAY_SHORT_INDEX_SCALE);
+            i = vectorizedMismatch(
+                    a, aOffset,
+                    b, bOffset,
+                    length, LOG2_ARRAY_SHORT_INDEX_SCALE);
+            if (i >= 0)
+                return i;
+            i = length - ~i;
+        }
+        for (; i < length; i++) {
+            if (a[aFromIndex + i] != b[bFromIndex + i])
+                return i;
+        }
+        return -1;
+    }
+
+
+    // Ints
+
+    public static int mismatch(int[] a,
+                               int[] b,
+                               int length) {
+        int i = 0;
+        if (length > 1) {
+            if (a[0] != b[0])
+                return 0;
+            i = vectorizedMismatch(
+                    a, Unsafe.ARRAY_INT_BASE_OFFSET,
+                    b, Unsafe.ARRAY_INT_BASE_OFFSET,
+                    length, LOG2_ARRAY_INT_INDEX_SCALE);
+            if (i >= 0)
+                return i;
+            i = length - ~i;
+        }
+        for (; i < length; i++) {
+            if (a[i] != b[i])
+                return i;
+        }
+        return -1;
+    }
+
+    public static int mismatch(int[] a, int aFromIndex,
+                               int[] b, int bFromIndex,
+                               int length) {
+        int i = 0;
+        if (length > 1) {
+            if (a[aFromIndex] != b[bFromIndex])
+                return 0;
+            int aOffset = Unsafe.ARRAY_INT_BASE_OFFSET + (aFromIndex << LOG2_ARRAY_INT_INDEX_SCALE);
+            int bOffset = Unsafe.ARRAY_INT_BASE_OFFSET + (bFromIndex << LOG2_ARRAY_INT_INDEX_SCALE);
+            i = vectorizedMismatch(
+                    a, aOffset,
+                    b, bOffset,
+                    length, LOG2_ARRAY_INT_INDEX_SCALE);
+            if (i >= 0)
+                return i;
+            i = length - ~i;
+        }
+        for (; i < length; i++) {
+            if (a[aFromIndex + i] != b[bFromIndex + i])
+                return i;
+        }
+        return -1;
+    }
+
+
+    // Floats
+
+    public static int mismatch(float[] a,
+                               float[] b,
+                               int length) {
+        return mismatch(a, 0, b, 0, length);
+    }
+
+    public static int mismatch(float[] a, int aFromIndex,
+                               float[] b, int bFromIndex,
+                               int length) {
+        int i = 0;
+        if (length > 1) {
+            if (Float.floatToRawIntBits(a[aFromIndex]) == Float.floatToRawIntBits(b[bFromIndex])) {
+                int aOffset = Unsafe.ARRAY_FLOAT_BASE_OFFSET + (aFromIndex << LOG2_ARRAY_FLOAT_INDEX_SCALE);
+                int bOffset = Unsafe.ARRAY_FLOAT_BASE_OFFSET + (bFromIndex << LOG2_ARRAY_FLOAT_INDEX_SCALE);
+                i = vectorizedMismatch(
+                        a, aOffset,
+                        b, bOffset,
+                        length, LOG2_ARRAY_FLOAT_INDEX_SCALE);
+            }
+            // Mismatched
+            if (i >= 0) {
+                // Check if mismatch is not associated with two NaN values
+                if (!Float.isNaN(a[aFromIndex + i]) || !Float.isNaN(b[bFromIndex + i]))
+                    return i;
+
+                // Mismatch on two different NaN values that are normalized to match
+                // Fall back to slow mechanism
+                // ISSUE: Consider looping over vectorizedMismatch adjusting ranges
+                // However, requires that returned value be relative to input ranges
+                i++;
+            }
+            // Matched
+            else {
+                i = length - ~i;
+            }
+        }
+        for (; i < length; i++) {
+            if (Float.floatToIntBits(a[aFromIndex + i]) != Float.floatToIntBits(b[bFromIndex + i]))
+                return i;
+        }
+        return -1;
+    }
+
+    // 64 bit sizes
+
+    // Long
+
+    public static int mismatch(long[] a,
+                               long[] b,
+                               int length) {
+        if (length == 0) {
+            return -1;
+        }
+        if (a[0] != b[0])
+            return 0;
+        int i = vectorizedMismatch(
+                a, Unsafe.ARRAY_LONG_BASE_OFFSET,
+                b, Unsafe.ARRAY_LONG_BASE_OFFSET,
+                length, LOG2_ARRAY_LONG_INDEX_SCALE);
+        return i >= 0 ? i : -1;
+    }
+
+    public static int mismatch(long[] a, int aFromIndex,
+                               long[] b, int bFromIndex,
+                               int length) {
+        if (length == 0) {
+            return -1;
+        }
+        if (a[aFromIndex] != b[bFromIndex])
+            return 0;
+        int aOffset = Unsafe.ARRAY_LONG_BASE_OFFSET + (aFromIndex << LOG2_ARRAY_LONG_INDEX_SCALE);
+        int bOffset = Unsafe.ARRAY_LONG_BASE_OFFSET + (bFromIndex << LOG2_ARRAY_LONG_INDEX_SCALE);
+        int i = vectorizedMismatch(
+                a, aOffset,
+                b, bOffset,
+                length, LOG2_ARRAY_LONG_INDEX_SCALE);
+        return i >= 0 ? i : -1;
+    }
+
+
+    // Double
+
+    public static int mismatch(double[] a,
+                               double[] b,
+                               int length) {
+        return mismatch(a, 0, b, 0, length);
+    }
+
+    public static int mismatch(double[] a, int aFromIndex,
+                               double[] b, int bFromIndex,
+                               int length) {
+        if (length == 0) {
+            return -1;
+        }
+        int i = 0;
+        if (Double.doubleToRawLongBits(a[aFromIndex]) == Double.doubleToRawLongBits(b[bFromIndex])) {
+            int aOffset = Unsafe.ARRAY_DOUBLE_BASE_OFFSET + (aFromIndex << LOG2_ARRAY_DOUBLE_INDEX_SCALE);
+            int bOffset = Unsafe.ARRAY_DOUBLE_BASE_OFFSET + (bFromIndex << LOG2_ARRAY_DOUBLE_INDEX_SCALE);
+            i = vectorizedMismatch(
+                    a, aOffset,
+                    b, bOffset,
+                    length, LOG2_ARRAY_DOUBLE_INDEX_SCALE);
+        }
+        if (i >= 0) {
+            // Check if mismatch is not associated with two NaN values
+            if (!Double.isNaN(a[aFromIndex + i]) || !Double.isNaN(b[bFromIndex + i]))
+                return i;
+
+            // Mismatch on two different NaN values that are normalized to match
+            // Fall back to slow mechanism
+            // ISSUE: Consider looping over vectorizedMismatch adjusting ranges
+            // However, requires that returned value be relative to input ranges
+            i++;
+            for (; i < length; i++) {
+                if (Double.doubleToLongBits(a[aFromIndex + i]) != Double.doubleToLongBits(b[bFromIndex + i]))
+                    return i;
+            }
+        }
+
+        return -1;
+    }
+
+    /**
+     * A soft maximum array length imposed by array growth computations.
+     * Some JVMs (such as HotSpot) have an implementation limit that will cause
+     *
+     *     OutOfMemoryError("Requested array size exceeds VM limit")
+     *
+     * to be thrown if a request is made to allocate an array of some length near
+     * Integer.MAX_VALUE, even if there is sufficient heap available. The actual
+     * limit might depend on some JVM implementation-specific characteristics such
+     * as the object header size. The soft maximum value is chosen conservatively so
+     * as to be smaller than any implementation limit that is likely to be encountered.
+     */
+    public static final int SOFT_MAX_ARRAY_LENGTH = Integer.MAX_VALUE - 8;
+
+    /**
+     * Computes a new array length given an array's current length, a minimum growth
+     * amount, and a preferred growth amount. The computation is done in an overflow-safe
+     * fashion.
+     *
+     * This method is used by objects that contain an array that might need to be grown
+     * in order to fulfill some immediate need (the minimum growth amount) but would also
+     * like to request more space (the preferred growth amount) in order to accommodate
+     * potential future needs. The returned length is usually clamped at the soft maximum
+     * length in order to avoid hitting the JVM implementation limit. However, the soft
+     * maximum will be exceeded if the minimum growth amount requires it.
+     *
+     * If the preferred growth amount is less than the minimum growth amount, the
+     * minimum growth amount is used as the preferred growth amount.
+     *
+     * The preferred length is determined by adding the preferred growth amount to the
+     * current length. If the preferred length does not exceed the soft maximum length
+     * (SOFT_MAX_ARRAY_LENGTH) then the preferred length is returned.
+     *
+     * If the preferred length exceeds the soft maximum, we use the minimum growth
+     * amount. The minimum required length is determined by adding the minimum growth
+     * amount to the current length. If the minimum required length exceeds Integer.MAX_VALUE,
+     * then this method throws OutOfMemoryError. Otherwise, this method returns the greater of
+     * the soft maximum or the minimum required length.
+     *
+     * Note that this method does not do any array allocation itself; it only does array
+     * length growth computations. However, it will throw OutOfMemoryError as noted above.
+     *
+     * Note also that this method cannot detect the JVM's implementation limit, and it
+     * may compute and return a length value up to and including Integer.MAX_VALUE that
+     * might exceed the JVM's implementation limit. In that case, the caller will likely
+     * attempt an array allocation with that length and encounter an OutOfMemoryError.
+     * Of course, regardless of the length value returned from this method, the caller
+     * may encounter OutOfMemoryError if there is insufficient heap to fulfill the request.
+     *
+     * @param oldLength   current length of the array (must be nonnegative)
+     * @param minGrowth   minimum required growth amount (must be positive)
+     * @param prefGrowth  preferred growth amount
+     * @return the new array length
+     * @throws OutOfMemoryError if the new length would exceed Integer.MAX_VALUE
+     */
+    public static int newLength(int oldLength, int minGrowth, int prefGrowth) {
+        // preconditions not checked because of inlining
+        // assert oldLength >= 0
+        // assert minGrowth > 0
+
+        int prefLength = oldLength + Math.max(minGrowth, prefGrowth); // might overflow
+        if (0 < prefLength && prefLength <= SOFT_MAX_ARRAY_LENGTH) {
+            return prefLength;
+        } else {
+            // put code cold in a separate method
+            return hugeLength(oldLength, minGrowth);
+        }
+    }
+
+    private static int hugeLength(int oldLength, int minGrowth) {
+        int minLength = oldLength + minGrowth;
+        if (minLength < 0) { // overflow
+            throw new OutOfMemoryError(
+                "Required array length " + oldLength + " + " + minGrowth + " is too large");
+        } else if (minLength <= SOFT_MAX_ARRAY_LENGTH) {
+            return SOFT_MAX_ARRAY_LENGTH;
+        } else {
+            return minLength;
+        }
+    }
+
+    /**
+     * Reverses the elements of an array in-place.
+     *
+     * @param <T> the array component type
+     * @param a the array to be reversed
+     * @return the reversed array, always the same array as the argument
+     */
+    public static <T> T[] reverse(T[] a) {
+        int limit = a.length / 2;
+        for (int i = 0, j = a.length - 1; i < limit; i++, j--) {
+            T t = a[i];
+            a[i] = a[j];
+            a[j] = t;
+        }
+        return a;
+    }
+
+    /**
+     * Dump the contents of the given collection into the given array, in reverse order.
+     * This mirrors the semantics of Collection.toArray(T[]) in regard to reusing the given
+     * array, appending null if necessary, or allocating a new array of the same component type.
+     * <p>
+     * A constraint is that this method should issue exactly one method call on the collection
+     * to obtain the elements and the size. Having a separate size() call or using an Iterator
+     * could result in errors if the collection changes size between calls. This implies that
+     * the elements need to be obtained via a single call to one of the toArray() methods.
+     * This further implies allocating memory proportional to the number of elements and
+     * making an extra copy, but this seems unavoidable.
+     * <p>
+     * An obvious approach would be simply to call coll.toArray(array) and then reverse the
+     * order of the elements. This doesn't work, because if given array is sufficiently long,
+     * we cannot tell how many elements were copied into it and thus there is no way to reverse
+     * the right set of elements while leaving the remaining array elements undisturbed.
+     *
+     * @throws ArrayStoreException if coll contains elements that can't be stored in the array
+     */
+    public static <T> T[] toArrayReversed(Collection<?> coll, T[] array) {
+        T[] newArray = reverse(coll.toArray(Arrays.copyOfRange(array, 0, 0)));
+        if (newArray.length > array.length) {
+            return newArray;
+        } else {
+            System.arraycopy(newArray, 0, array, 0, newArray.length);
+            if (array.length > newArray.length) {
+                array[newArray.length] = null;
+            }
+            return array;
+        }
+    }
+}
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diff --git a/tests/test_data/std/jdk/internal/util/ByteArray.java b/tests/test_data/std/jdk/internal/util/ByteArray.java
new file mode 100644
index 00000000..94395df2
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/util/ByteArray.java
@@ -0,0 +1,424 @@
+/*
+ * Copyright (c) 2023, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package jdk.internal.util;
+
+import java.lang.invoke.MethodHandles;
+import java.lang.invoke.VarHandle;
+import java.nio.ByteOrder;
+
+/**
+ * Utility methods for packing/unpacking primitive values in/out of byte arrays
+ * using {@linkplain ByteOrder#BIG_ENDIAN big endian order} (aka. "network order").
+ * <p>
+ * All methods in this class will throw an {@linkplain NullPointerException} if {@code null} is
+ * passed in as a method parameter for a byte array.
+ */
+public final class ByteArray {
+
+    private ByteArray() {
+    }
+
+    private static final VarHandle SHORT = create(short[].class);
+    private static final VarHandle CHAR = create(char[].class);
+    private static final VarHandle INT = create(int[].class);
+    private static final VarHandle FLOAT = create(float[].class);
+    private static final VarHandle LONG = create(long[].class);
+    private static final VarHandle DOUBLE = create(double[].class);
+
+    /*
+     * Methods for unpacking primitive values from byte arrays starting at
+     * a given offset.
+     */
+
+    /**
+     * {@return a {@code boolean} from the provided {@code array} at the given {@code offset}}.
+     *
+     * @param array  to read a value from.
+     * @param offset where extraction in the array should begin
+     * @throws IndexOutOfBoundsException if the provided {@code offset} is outside
+     *                                   the range [0, array.length - 1]
+     * @see #setBoolean(byte[], int, boolean)
+     */
+    public static boolean getBoolean(byte[] array, int offset) {
+        return array[offset] != 0;
+    }
+
+    /**
+     * {@return a {@code char} from the provided {@code array} at the given {@code offset}
+     * using big endian order}.
+     * <p>
+     * There are no access alignment requirements.
+     *
+     * @param array  to get a value from.
+     * @param offset where extraction in the array should begin
+     * @throws IndexOutOfBoundsException if the provided {@code offset} is outside
+     *                                   the range [0, array.length - 2]
+     * @see #setChar(byte[], int, char)
+     */
+    public static char getChar(byte[] array, int offset) {
+        return (char) CHAR.get(array, offset);
+    }
+
+    /**
+     * {@return a {@code short} from the provided {@code array} at the given {@code offset}
+     * using big endian order}.
+     * <p>
+     * There are no access alignment requirements.
+     *
+     * @param array  to get a value from.
+     * @param offset where extraction in the array should begin
+     * @return a {@code short} from the array
+     * @throws IndexOutOfBoundsException if the provided {@code offset} is outside
+     *                                   the range [0, array.length - 2]
+     * @see #setShort(byte[], int, short)
+     */
+    public static short getShort(byte[] array, int offset) {
+        return (short) SHORT.get(array, offset);
+    }
+
+    /**
+     * {@return an {@code unsigned short} from the provided {@code array} at the given {@code offset}
+     * using big endian order}.
+     * <p>
+     * There are no access alignment requirements.
+     *
+     * @param array  to get a value from.
+     * @param offset where extraction in the array should begin
+     * @return an {@code int} representing an unsigned short from the array
+     * @throws IndexOutOfBoundsException if the provided {@code offset} is outside
+     *                                   the range [0, array.length - 2]
+     * @see #setUnsignedShort(byte[], int, int)
+     */
+    public static int getUnsignedShort(byte[] array, int offset) {
+        return Short.toUnsignedInt((short) SHORT.get(array, offset));
+    }
+
+    /**
+     * {@return an {@code int} from the provided {@code array} at the given {@code offset}
+     * using big endian order}.
+     * <p>
+     * There are no access alignment requirements.
+     *
+     * @param array  to get a value from.
+     * @param offset where extraction in the array should begin
+     * @throws IndexOutOfBoundsException if the provided {@code offset} is outside
+     *                                   the range [0, array.length - 4]
+     * @see #setInt(byte[], int, int)
+     */
+    public static int getInt(byte[] array, int offset) {
+        return (int) INT.get(array, offset);
+    }
+
+    /**
+     * {@return a {@code float} from the provided {@code array} at the given {@code offset}
+     * using big endian order}.
+     * <p>
+     * Variants of {@linkplain Float#NaN } values are canonized to a single NaN value.
+     * <p>
+     * There are no access alignment requirements.
+     *
+     * @param array  to get a value from.
+     * @param offset where extraction in the array should begin
+     * @throws IndexOutOfBoundsException if the provided {@code offset} is outside
+     *                                   the range [0, array.length - 4]
+     * @see #setFloat(byte[], int, float)
+     */
+    public static float getFloat(byte[] array, int offset) {
+        // Using Float.intBitsToFloat collapses NaN values to a single
+        // "canonical" NaN value
+        return Float.intBitsToFloat((int) INT.get(array, offset));
+    }
+
+    /**
+     * {@return a {@code float} from the provided {@code array} at the given {@code offset}
+     * using big endian order}.
+     * <p>
+     * Variants of {@linkplain Float#NaN } values are silently read according
+     * to their bit patterns.
+     * <p>
+     * There are no access alignment requirements.
+     *
+     * @param array  to get a value from.
+     * @param offset where extraction in the array should begin
+     * @throws IndexOutOfBoundsException if the provided {@code offset} is outside
+     *                                   the range [0, array.length - 4]
+     * @see #setFloatRaw(byte[], int, float)
+     */
+    public static float getFloatRaw(byte[] array, int offset) {
+        // Just gets the bits as they are
+        return (float) FLOAT.get(array, offset);
+    }
+
+    /**
+     * {@return a {@code long} from the provided {@code array} at the given {@code offset}
+     * using big endian order}.
+     * <p>
+     * There are no access alignment requirements.
+     *
+     * @param array  to get a value from.
+     * @param offset where extraction in the array should begin
+     * @throws IndexOutOfBoundsException if the provided {@code offset} is outside
+     *                                   the range [0, array.length - 8]
+     * @see #setLong(byte[], int, long)
+     */
+    public static long getLong(byte[] array, int offset) {
+        return (long) LONG.get(array, offset);
+    }
+
+    /**
+     * {@return a {@code double} from the provided {@code array} at the given {@code offset}
+     * using big endian order}.
+     * <p>
+     * Variants of {@linkplain Double#NaN } values are canonized to a single NaN value.
+     * <p>
+     * There are no access alignment requirements.
+     *
+     * @param array  to get a value from.
+     * @param offset where extraction in the array should begin
+     * @throws IndexOutOfBoundsException if the provided {@code offset} is outside
+     *                                   the range [0, array.length - 8]
+     * @see #setDouble(byte[], int, double)
+     */
+    public static double getDouble(byte[] array, int offset) {
+        // Using Double.longBitsToDouble collapses NaN values to a single
+        // "canonical" NaN value
+        return Double.longBitsToDouble((long) LONG.get(array, offset));
+    }
+
+    /**
+     * {@return a {@code double} from the provided {@code array} at the given {@code offset}
+     * using big endian order}.
+     * <p>
+     * Variants of {@linkplain Double#NaN } values are silently read according to
+     * their bit patterns.
+     * <p>
+     * There are no access alignment requirements.
+     *
+     * @param array  to get a value from.
+     * @param offset where extraction in the array should begin
+     * @throws IndexOutOfBoundsException if the provided {@code offset} is outside
+     *                                   the range [0, array.length - 8]
+     * @see #setDoubleRaw(byte[], int, double)
+     */
+    public static double getDoubleRaw(byte[] array, int offset) {
+        // Just gets the bits as they are
+        return (double) DOUBLE.get(array, offset);
+    }
+
+    /*
+     * Methods for packing primitive values into byte arrays starting at a given
+     * offset.
+     */
+
+    /**
+     * Sets (writes) the provided {@code value} into
+     * the provided {@code array} beginning at the given {@code offset}.
+     *
+     * @param array  to set (write) a value into
+     * @param offset where setting (writing) in the array should begin
+     * @param value  value to set in the array
+     * @throws IndexOutOfBoundsException if the provided {@code offset} is outside
+     *                                   the range [0, array.length]
+     * @see #getBoolean(byte[], int)
+     */
+    public static void setBoolean(byte[] array, int offset, boolean value) {
+        array[offset] = (byte) (value ? 1 : 0);
+    }
+
+    /**
+     * Sets (writes) the provided {@code value} using big endian order into
+     * the provided {@code array} beginning at the given {@code offset}.
+     * <p>
+     * There are no access alignment requirements.
+     *
+     * @param array  to set (write) a value into
+     * @param offset where setting (writing) in the array should begin
+     * @param value  value to set in the array
+     * @throws IndexOutOfBoundsException if the provided {@code offset} is outside
+     *                                   the range [0, array.length - 2]
+     * @see #getChar(byte[], int)
+     */
+    public static void setChar(byte[] array, int offset, char value) {
+        CHAR.set(array, offset, value);
+    }
+
+    /**
+     * Sets (writes) the provided {@code value} using big endian order into
+     * the provided {@code array} beginning at the given {@code offset}.
+     * <p>
+     * There are no access alignment requirements.
+     *
+     * @param array  to set (write) a value into
+     * @param offset where setting (writing) in the array should begin
+     * @param value  value to set in the array
+     * @throws IndexOutOfBoundsException if the provided {@code offset} is outside
+     *                                   the range [0, array.length - 2]
+     * @see #getShort(byte[], int)
+     */
+    public static void setShort(byte[] array, int offset, short value) {
+        SHORT.set(array, offset, value);
+    }
+
+    /**
+     * Sets (writes) the provided {@code value} using big endian order into
+     * the provided {@code array} beginning at the given {@code offset}.
+     * <p>
+     * There are no access alignment requirements.
+     *
+     * @param array  to set (write) a value into
+     * @param offset where setting (writing) in the array should begin
+     * @param value  value to set in the array
+     * @throws IndexOutOfBoundsException if the provided {@code offset} is outside
+     *                                   the range [0, array.length - 2]
+     * @see #getUnsignedShort(byte[], int)
+     */
+    public static void setUnsignedShort(byte[] array, int offset, int value) {
+        SHORT.set(array, offset, (short) (char) value);
+    }
+
+    /**
+     * Sets (writes) the provided {@code value} using big endian order into
+     * the provided {@code array} beginning at the given {@code offset}.
+     * <p>
+     * There are no access alignment requirements.
+     *
+     * @param array  to set (write) a value into
+     * @param offset where setting (writing) in the array should begin
+     * @param value  value to set in the array
+     * @throws IndexOutOfBoundsException if the provided {@code offset} is outside
+     *                                   the range [0, array.length - 4]
+     * @see #getInt(byte[], int)
+     */
+    public static void setInt(byte[] array, int offset, int value) {
+        INT.set(array, offset, value);
+    }
+
+    /**
+     * Sets (writes) the provided {@code value} using big endian order into
+     * the provided {@code array} beginning at the given {@code offset}.
+     * <p>
+     * Variants of {@linkplain Float#NaN } values are canonized to a single NaN value.
+     * <p>
+     * There are no access alignment requirements.
+     *
+     * @param array  to set (write) a value into
+     * @param offset where setting (writing) in the array should begin
+     * @param value  value to set in the array
+     * @throws IndexOutOfBoundsException if the provided {@code offset} is outside
+     *                                   the range [0, array.length - 2]
+     * @see #getFloat(byte[], int)
+     */
+    public static void setFloat(byte[] array, int offset, float value) {
+        // Using Float.floatToIntBits collapses NaN values to a single
+        // "canonical" NaN value
+        INT.set(array, offset, Float.floatToIntBits(value));
+    }
+
+    /**
+     * Sets (writes) the provided {@code value} using big endian order into
+     * the provided {@code array} beginning at the given {@code offset}.
+     * <p>
+     * Variants of {@linkplain Float#NaN } values are silently written according to
+     * their bit patterns.
+     * <p>
+     * There are no access alignment requirements.
+     *
+     * @param array  to set (write) a value into
+     * @param offset where setting (writing) in the array should begin
+     * @param value  value to set in the array
+     * @throws IndexOutOfBoundsException if the provided {@code offset} is outside
+     *                                   the range [0, array.length - 2]
+     * @see #getFloatRaw(byte[], int)
+     */
+    public static void setFloatRaw(byte[] array, int offset, float value) {
+        // Just sets the bits as they are
+        FLOAT.set(array, offset, value);
+    }
+
+    /**
+     * Sets (writes) the provided {@code value} using big endian order into
+     * the provided {@code array} beginning at the given {@code offset}.
+     * <p>
+     * There are no access alignment requirements.
+     *
+     * @param array  to set (write) a value into
+     * @param offset where setting (writing) in the array should begin
+     * @param value  value to set in the array
+     * @throws IndexOutOfBoundsException if the provided {@code offset} is outside
+     *                                   the range [0, array.length - 4]
+     * @see #getLong(byte[], int)
+     */
+    public static void setLong(byte[] array, int offset, long value) {
+        LONG.set(array, offset, value);
+    }
+
+    /**
+     * Sets (writes) the provided {@code value} using big endian order into
+     * the provided {@code array} beginning at the given {@code offset}.
+     * <p>
+     * Variants of {@linkplain Double#NaN } values are canonized to a single NaN value.
+     * <p>
+     * There are no access alignment requirements.
+     *
+     * @param array  to set (write) a value into
+     * @param offset where setting (writing) in the array should begin
+     * @param value  value to set in the array
+     * @throws IndexOutOfBoundsException if the provided {@code offset} is outside
+     *                                   the range [0, array.length - 2]
+     * @see #getDouble(byte[], int)
+     */
+    public static void setDouble(byte[] array, int offset, double value) {
+        // Using Double.doubleToLongBits collapses NaN values to a single
+        // "canonical" NaN value
+        LONG.set(array, offset, Double.doubleToLongBits(value));
+    }
+
+    /**
+     * Sets (writes) the provided {@code value} using big endian order into
+     * the provided {@code array} beginning at the given {@code offset}.
+     * <p>
+     * Variants of {@linkplain Double#NaN } values are silently written according to
+     * their bit patterns.
+     * <p>
+     * There are no access alignment requirements.
+     *
+     * @param array  to set (write) a value into
+     * @param offset where setting (writing) in the array should begin
+     * @param value  value to set in the array
+     * @throws IndexOutOfBoundsException if the provided {@code offset} is outside
+     *                                   the range [0, array.length - 2]
+     * @see #getDoubleRaw(byte[], int)
+     */
+    public static void setDoubleRaw(byte[] array, int offset, double value) {
+        // Just sets the bits as they are
+        DOUBLE.set(array, offset, value);
+    }
+
+    private static VarHandle create(Class<?> viewArrayClass) {
+        return MethodHandles.byteArrayViewVarHandle(viewArrayClass, ByteOrder.BIG_ENDIAN);
+    }
+
+}
diff --git a/tests/test_data/std/jdk/internal/util/ByteArrayLittleEndian.class b/tests/test_data/std/jdk/internal/util/ByteArrayLittleEndian.class
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diff --git a/tests/test_data/std/jdk/internal/util/ByteArrayLittleEndian.java b/tests/test_data/std/jdk/internal/util/ByteArrayLittleEndian.java
new file mode 100644
index 00000000..fcd7ca2b
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/util/ByteArrayLittleEndian.java
@@ -0,0 +1,424 @@
+/*
+ * Copyright (c) 2023, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package jdk.internal.util;
+
+import java.lang.invoke.MethodHandles;
+import java.lang.invoke.VarHandle;
+import java.nio.ByteOrder;
+
+/**
+ * Utility methods for packing/unpacking primitive values in/out of byte arrays
+ * using {@linkplain ByteOrder#LITTLE_ENDIAN little endian order}.
+ * <p>
+ * All methods in this class will throw an {@linkplain NullPointerException} if {@code null} is
+ * passed in as a method parameter for a byte array.
+ */
+public final class ByteArrayLittleEndian {
+
+    private ByteArrayLittleEndian() {
+    }
+
+    private static final VarHandle SHORT = createLittleEndian(short[].class);
+    private static final VarHandle CHAR = createLittleEndian(char[].class);
+    private static final VarHandle INT = createLittleEndian(int[].class);
+    private static final VarHandle FLOAT = createLittleEndian(float[].class);
+    private static final VarHandle LONG = createLittleEndian(long[].class);
+    private static final VarHandle DOUBLE = createLittleEndian(double[].class);
+
+    /*
+     * Methods for unpacking primitive values from byte arrays starting at
+     * a given offset.
+     */
+
+    /**
+     * {@return a {@code boolean} from the provided {@code array} at the given {@code offset}}.
+     *
+     * @param array  to read a value from.
+     * @param offset where extraction in the array should begin
+     * @throws IndexOutOfBoundsException if the provided {@code offset} is outside
+     *                                   the range [0, array.length - 1]
+     * @see #setBoolean(byte[], int, boolean)
+     */
+    public static boolean getBoolean(byte[] array, int offset) {
+        return array[offset] != 0;
+    }
+
+    /**
+     * {@return a {@code char} from the provided {@code array} at the given {@code offset}
+     * using little endian order}.
+     * <p>
+     * There are no access alignment requirements.
+     *
+     * @param array  to get a value from.
+     * @param offset where extraction in the array should begin
+     * @throws IndexOutOfBoundsException if the provided {@code offset} is outside
+     *                                   the range [0, array.length - 2]
+     * @see #setChar(byte[], int, char)
+     */
+    public static char getChar(byte[] array, int offset) {
+        return (char) CHAR.get(array, offset);
+    }
+
+    /**
+     * {@return a {@code short} from the provided {@code array} at the given {@code offset}
+     * using little endian order}.
+     * <p>
+     * There are no access alignment requirements.
+     *
+     * @param array  to get a value from.
+     * @param offset where extraction in the array should begin
+     * @return a {@code short} from the array
+     * @throws IndexOutOfBoundsException if the provided {@code offset} is outside
+     *                                   the range [0, array.length - 2]
+     * @see #setShort(byte[], int, short)
+     */
+    public static short getShort(byte[] array, int offset) {
+        return (short) SHORT.get(array, offset);
+    }
+
+    /**
+     * {@return an {@code unsigned short} from the provided {@code array} at the given {@code offset}
+     * using little endian order}.
+     * <p>
+     * There are no access alignment requirements.
+     *
+     * @param array  to get a value from.
+     * @param offset where extraction in the array should begin
+     * @return an {@code int} representing an unsigned short from the array
+     * @throws IndexOutOfBoundsException if the provided {@code offset} is outside
+     *                                   the range [0, array.length - 2]
+     * @see #setUnsignedShort(byte[], int, int)
+     */
+    public static int getUnsignedShort(byte[] array, int offset) {
+        return Short.toUnsignedInt((short) SHORT.get(array, offset));
+    }
+
+    /**
+     * {@return an {@code int} from the provided {@code array} at the given {@code offset}
+     * using little endian order}.
+     * <p>
+     * There are no access alignment requirements.
+     *
+     * @param array  to get a value from.
+     * @param offset where extraction in the array should begin
+     * @throws IndexOutOfBoundsException if the provided {@code offset} is outside
+     *                                   the range [0, array.length - 4]
+     * @see #setInt(byte[], int, int)
+     */
+    public static int getInt(byte[] array, int offset) {
+        return (int) INT.get(array, offset);
+    }
+
+    /**
+     * {@return a {@code float} from the provided {@code array} at the given {@code offset}
+     * using little endian order}.
+     * <p>
+     * Variants of {@linkplain Float#NaN } values are canonized to a single NaN value.
+     * <p>
+     * There are no access alignment requirements.
+     *
+     * @param array  to get a value from.
+     * @param offset where extraction in the array should begin
+     * @throws IndexOutOfBoundsException if the provided {@code offset} is outside
+     *                                   the range [0, array.length - 4]
+     * @see #setFloat(byte[], int, float)
+     */
+    public static float getFloat(byte[] array, int offset) {
+        // Using Float.intBitsToFloat collapses NaN values to a single
+        // "canonical" NaN value
+        return Float.intBitsToFloat((int) INT.get(array, offset));
+    }
+
+    /**
+     * {@return a {@code float} from the provided {@code array} at the given {@code offset}
+     * using little endian order}.
+     * <p>
+     * Variants of {@linkplain Float#NaN } values are silently read according
+     * to their bit patterns.
+     * <p>
+     * There are no access alignment requirements.
+     *
+     * @param array  to get a value from.
+     * @param offset where extraction in the array should begin
+     * @throws IndexOutOfBoundsException if the provided {@code offset} is outside
+     *                                   the range [0, array.length - 4]
+     * @see #setFloatRaw(byte[], int, float)
+     */
+    public static float getFloatRaw(byte[] array, int offset) {
+        // Just gets the bits as they are
+        return (float) FLOAT.get(array, offset);
+    }
+
+    /**
+     * {@return a {@code long} from the provided {@code array} at the given {@code offset}
+     * using little endian order}.
+     * <p>
+     * There are no access alignment requirements.
+     *
+     * @param array  to get a value from.
+     * @param offset where extraction in the array should begin
+     * @throws IndexOutOfBoundsException if the provided {@code offset} is outside
+     *                                   the range [0, array.length - 8]
+     * @see #setLong(byte[], int, long)
+     */
+    public static long getLong(byte[] array, int offset) {
+        return (long) LONG.get(array, offset);
+    }
+
+    /**
+     * {@return a {@code double} from the provided {@code array} at the given {@code offset}
+     * using little endian order}.
+     * <p>
+     * Variants of {@linkplain Double#NaN } values are canonized to a single NaN value.
+     * <p>
+     * There are no access alignment requirements.
+     *
+     * @param array  to get a value from.
+     * @param offset where extraction in the array should begin
+     * @throws IndexOutOfBoundsException if the provided {@code offset} is outside
+     *                                   the range [0, array.length - 8]
+     * @see #setDouble(byte[], int, double)
+     */
+    public static double getDouble(byte[] array, int offset) {
+        // Using Double.longBitsToDouble collapses NaN values to a single
+        // "canonical" NaN value
+        return Double.longBitsToDouble((long) LONG.get(array, offset));
+    }
+
+    /**
+     * {@return a {@code double} from the provided {@code array} at the given {@code offset}
+     * using little endian order}.
+     * <p>
+     * Variants of {@linkplain Double#NaN } values are silently read according to
+     * their bit patterns.
+     * <p>
+     * There are no access alignment requirements.
+     *
+     * @param array  to get a value from.
+     * @param offset where extraction in the array should begin
+     * @throws IndexOutOfBoundsException if the provided {@code offset} is outside
+     *                                   the range [0, array.length - 8]
+     * @see #setDoubleRaw(byte[], int, double)
+     */
+    public static double getDoubleRaw(byte[] array, int offset) {
+        // Just gets the bits as they are
+        return (double) DOUBLE.get(array, offset);
+    }
+
+    /*
+     * Methods for packing primitive values into byte arrays starting at a given
+     * offset.
+     */
+
+    /**
+     * Sets (writes) the provided {@code value} into
+     * the provided {@code array} beginning at the given {@code offset}.
+     *
+     * @param array  to set (write) a value into
+     * @param offset where setting (writing) in the array should begin
+     * @param value  value to set in the array
+     * @throws IndexOutOfBoundsException if the provided {@code offset} is outside
+     *                                   the range [0, array.length]
+     * @see #getBoolean(byte[], int)
+     */
+    public static void setBoolean(byte[] array, int offset, boolean value) {
+        array[offset] = (byte) (value ? 1 : 0);
+    }
+
+    /**
+     * Sets (writes) the provided {@code value} using little endian order into
+     * the provided {@code array} beginning at the given {@code offset}.
+     * <p>
+     * There are no access alignment requirements.
+     *
+     * @param array  to set (write) a value into
+     * @param offset where setting (writing) in the array should begin
+     * @param value  value to set in the array
+     * @throws IndexOutOfBoundsException if the provided {@code offset} is outside
+     *                                   the range [0, array.length - 2]
+     * @see #getChar(byte[], int)
+     */
+    public static void setChar(byte[] array, int offset, char value) {
+        CHAR.set(array, offset, value);
+    }
+
+    /**
+     * Sets (writes) the provided {@code value} using little endian order into
+     * the provided {@code array} beginning at the given {@code offset}.
+     * <p>
+     * There are no access alignment requirements.
+     *
+     * @param array  to set (write) a value into
+     * @param offset where setting (writing) in the array should begin
+     * @param value  value to set in the array
+     * @throws IndexOutOfBoundsException if the provided {@code offset} is outside
+     *                                   the range [0, array.length - 2]
+     * @see #getShort(byte[], int)
+     */
+    public static void setShort(byte[] array, int offset, short value) {
+        SHORT.set(array, offset, value);
+    }
+
+    /**
+     * Sets (writes) the provided {@code value} using little endian order into
+     * the provided {@code array} beginning at the given {@code offset}.
+     * <p>
+     * There are no access alignment requirements.
+     *
+     * @param array  to set (write) a value into
+     * @param offset where setting (writing) in the array should begin
+     * @param value  value to set in the array
+     * @throws IndexOutOfBoundsException if the provided {@code offset} is outside
+     *                                   the range [0, array.length - 2]
+     * @see #getUnsignedShort(byte[], int)
+     */
+    public static void setUnsignedShort(byte[] array, int offset, int value) {
+        SHORT.set(array, offset, (short) (char) value);
+    }
+
+    /**
+     * Sets (writes) the provided {@code value} using little endian order into
+     * the provided {@code array} beginning at the given {@code offset}.
+     * <p>
+     * There are no access alignment requirements.
+     *
+     * @param array  to set (write) a value into
+     * @param offset where setting (writing) in the array should begin
+     * @param value  value to set in the array
+     * @throws IndexOutOfBoundsException if the provided {@code offset} is outside
+     *                                   the range [0, array.length - 4]
+     * @see #getInt(byte[], int)
+     */
+    public static void setInt(byte[] array, int offset, int value) {
+        INT.set(array, offset, value);
+    }
+
+    /**
+     * Sets (writes) the provided {@code value} using little endian order into
+     * the provided {@code array} beginning at the given {@code offset}.
+     * <p>
+     * Variants of {@linkplain Float#NaN } values are canonized to a single NaN value.
+     * <p>
+     * There are no access alignment requirements.
+     *
+     * @param array  to set (write) a value into
+     * @param offset where setting (writing) in the array should begin
+     * @param value  value to set in the array
+     * @throws IndexOutOfBoundsException if the provided {@code offset} is outside
+     *                                   the range [0, array.length - 2]
+     * @see #getFloat(byte[], int)
+     */
+    public static void setFloat(byte[] array, int offset, float value) {
+        // Using Float.floatToIntBits collapses NaN values to a single
+        // "canonical" NaN value
+        INT.set(array, offset, Float.floatToIntBits(value));
+    }
+
+    /**
+     * Sets (writes) the provided {@code value} using little endian order into
+     * the provided {@code array} beginning at the given {@code offset}.
+     * <p>
+     * Variants of {@linkplain Float#NaN } values are silently written according to
+     * their bit patterns.
+     * <p>
+     * There are no access alignment requirements.
+     *
+     * @param array  to set (write) a value into
+     * @param offset where setting (writing) in the array should begin
+     * @param value  value to set in the array
+     * @throws IndexOutOfBoundsException if the provided {@code offset} is outside
+     *                                   the range [0, array.length - 2]
+     * @see #getFloatRaw(byte[], int)
+     */
+    public static void setFloatRaw(byte[] array, int offset, float value) {
+        // Just sets the bits as they are
+        FLOAT.set(array, offset, value);
+    }
+
+    /**
+     * Sets (writes) the provided {@code value} using little endian order into
+     * the provided {@code array} beginning at the given {@code offset}.
+     * <p>
+     * There are no access alignment requirements.
+     *
+     * @param array  to set (write) a value into
+     * @param offset where setting (writing) in the array should begin
+     * @param value  value to set in the array
+     * @throws IndexOutOfBoundsException if the provided {@code offset} is outside
+     *                                   the range [0, array.length - 4]
+     * @see #getLong(byte[], int)
+     */
+    public static void setLong(byte[] array, int offset, long value) {
+        LONG.set(array, offset, value);
+    }
+
+    /**
+     * Sets (writes) the provided {@code value} using little endian order into
+     * the provided {@code array} beginning at the given {@code offset}.
+     * <p>
+     * Variants of {@linkplain Double#NaN } values are canonized to a single NaN value.
+     * <p>
+     * There are no access alignment requirements.
+     *
+     * @param array  to set (write) a value into
+     * @param offset where setting (writing) in the array should begin
+     * @param value  value to set in the array
+     * @throws IndexOutOfBoundsException if the provided {@code offset} is outside
+     *                                   the range [0, array.length - 2]
+     * @see #getDouble(byte[], int)
+     */
+    public static void setDouble(byte[] array, int offset, double value) {
+        // Using Double.doubleToLongBits collapses NaN values to a single
+        // "canonical" NaN value
+        LONG.set(array, offset, Double.doubleToLongBits(value));
+    }
+
+    /**
+     * Sets (writes) the provided {@code value} using little endian order into
+     * the provided {@code array} beginning at the given {@code offset}.
+     * <p>
+     * Variants of {@linkplain Double#NaN } values are silently written according to
+     * their bit patterns.
+     * <p>
+     * There are no access alignment requirements.
+     *
+     * @param array  to set (write) a value into
+     * @param offset where setting (writing) in the array should begin
+     * @param value  value to set in the array
+     * @throws IndexOutOfBoundsException if the provided {@code offset} is outside
+     *                                   the range [0, array.length - 2]
+     * @see #getDoubleRaw(byte[], int)
+     */
+    public static void setDoubleRaw(byte[] array, int offset, double value) {
+        // Just sets the bits as they are
+        DOUBLE.set(array, offset, value);
+    }
+
+    private static VarHandle createLittleEndian(Class<?> viewArrayClass) {
+        return MethodHandles.byteArrayViewVarHandle(viewArrayClass, ByteOrder.LITTLE_ENDIAN);
+    }
+
+}
diff --git a/tests/test_data/std/jdk/internal/util/ClassFileDumper$1.class b/tests/test_data/std/jdk/internal/util/ClassFileDumper$1.class
new file mode 100644
index 0000000000000000000000000000000000000000..e5990953e6848db79fe0d3663f624ed05e455858
GIT binary patch
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diff --git a/tests/test_data/std/jdk/internal/util/ClassFileDumper$2.class b/tests/test_data/std/jdk/internal/util/ClassFileDumper$2.class
new file mode 100644
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diff --git a/tests/test_data/std/jdk/internal/util/ClassFileDumper.class b/tests/test_data/std/jdk/internal/util/ClassFileDumper.class
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diff --git a/tests/test_data/std/jdk/internal/util/ClassFileDumper.java b/tests/test_data/std/jdk/internal/util/ClassFileDumper.java
new file mode 100644
index 00000000..afb3d137
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/util/ClassFileDumper.java
@@ -0,0 +1,196 @@
+/*
+ * Copyright (c) 2013, 2023, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package jdk.internal.util;
+
+import jdk.internal.misc.VM;
+import sun.security.action.GetPropertyAction;
+
+import java.io.IOException;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.security.AccessController;
+import java.security.PrivilegedAction;
+import java.util.HexFormat;
+import java.util.Objects;
+import java.util.Set;
+import java.util.concurrent.ConcurrentHashMap;
+import java.util.concurrent.atomic.AtomicInteger;
+
+/**
+ * ClassFile dumper utility class to log normal and hidden classes.
+ *
+ * @implNote
+ * Because this class is called by MethodHandleStatics, LambdaForms generation
+ * and LambdaMetafactory, make use of lambda lead to recursive calls cause stack overflow.
+ */
+public final class ClassFileDumper {
+    private static final ConcurrentHashMap<String, ClassFileDumper> DUMPER_MAP
+            = new ConcurrentHashMap<>();
+
+    /**
+     * Returns a ClassFileDumper instance for the given key with a given
+     * dump path. To enable dumping of the generated classes
+     *     -D<key> or -D<key>=true
+     *
+     * The system property is read only once when it is the first time
+     * the dumper instance for the given key is created.
+     */
+    public static ClassFileDumper getInstance(String key, String path) {
+        Objects.requireNonNull(key);
+        Objects.requireNonNull(path);
+
+        var dumper = DUMPER_MAP.get(key);
+        if (dumper == null) {
+            var newDumper = new ClassFileDumper(key, path);
+            var v = DUMPER_MAP.putIfAbsent(key, newDumper);
+            dumper = v != null ? v : newDumper;
+        }
+
+        if (dumper.isEnabled() && !path.equals(dumper.dumpDir)) {
+            throw new IllegalArgumentException("mismatched dump path for " + key);
+        }
+        return dumper;
+    }
+
+    private final String key;
+    private final String dumpDir;
+    private final boolean enabled;
+    private final AtomicInteger counter = new AtomicInteger();
+
+    private ClassFileDumper(String key, String path) {
+        String value = GetPropertyAction.privilegedGetProperty(key);
+        this.key = key;
+        boolean enabled = value != null && value.isEmpty() ? true : Boolean.parseBoolean(value);
+        if (enabled) {
+            validateDumpDir(path);
+        }
+        this.dumpDir = path;
+        this.enabled = enabled;
+    }
+
+    public String key() {
+        return key;
+    }
+    public boolean isEnabled() {
+        return enabled;
+    }
+
+    private Path pathname(String name) {
+        return Path.of(dumpDir, encodeForFilename(name) + ".class");
+    }
+
+    /**
+     * This method determines the path name from the given name and {@code Class}
+     * object.  If it is a hidden class, it will dump the given bytes at
+     * a path of the given name with a suffix "." concatenated
+     * with the suffix of the hidden class name.
+     */
+    public void dumpClass(String name, Class<?> c, byte[] bytes) {
+        if (!isEnabled()) return;
+
+        String cn = c.getName();
+        int suffixIdx = cn.lastIndexOf('/');
+        if (suffixIdx > 0) {
+            name += '.' + cn.substring(suffixIdx + 1);
+        }
+        write(pathname(name), bytes);
+    }
+
+    /**
+     * This method dumps the given bytes at a path of the given name with
+     * a suffix ".failed-$COUNTER" where $COUNTER will be incremented
+     * for each time this method is called.
+     */
+    public void dumpFailedClass(String name, byte[] bytes) {
+        if (!isEnabled()) return;
+
+        write(pathname(name + ".failed-" + counter.incrementAndGet()), bytes);
+    }
+
+    @SuppressWarnings("removal")
+    private void write(Path path, byte[] bytes) {
+        AccessController.doPrivileged(new PrivilegedAction<>() {
+            @Override public Void run() {
+                try {
+                    Files.createDirectories(path.getParent());
+                    Files.write(path, bytes);
+                } catch (Exception ex) {
+                    if (VM.isModuleSystemInited()) {
+                        // log only when lambda is ready to use
+                        System.getLogger(ClassFileDumper.class.getName())
+                              .log(System.Logger.Level.WARNING, "Exception writing to " +
+                                        path + " " + ex.getMessage());
+                    }
+                    // simply don't care if this operation failed
+                }
+                return null;
+            }});
+    }
+
+    /*
+     * Validate if the given dir is a writeable directory if exists.
+     */
+    @SuppressWarnings("removal")
+    private static Path validateDumpDir(String dir) {
+        return AccessController.doPrivileged(new PrivilegedAction<>() {
+            @Override
+            public Path run() {
+                Path path = Path.of(dir);
+                if (Files.notExists(path)) {
+                    try {
+                        Files.createDirectories(path);
+                    } catch (IOException ex) {
+                        throw new IllegalArgumentException("Fail to create " + path, ex);
+                    }
+                }
+                if (!Files.isDirectory(path)) {
+                    throw new IllegalArgumentException("Path " + path + " is not a directory");
+                } else if (!Files.isWritable(path)) {
+                    throw new IllegalArgumentException("Directory " + path + " is not writable");
+                }
+                return path;
+            }
+        });
+    }
+
+    private static final HexFormat HEX = HexFormat.of().withUpperCase();
+    private static final Set<Character> BAD_CHARS = Set.of('\\', ':', '*', '?', '"', '<', '>', '|');
+
+    private static String encodeForFilename(String className) {
+        int len = className.length();
+        StringBuilder sb = new StringBuilder(len);
+        for (int i = 0; i < len; i++) {
+            char c = className.charAt(i);
+            // control characters
+            if (c <= 31 || BAD_CHARS.contains(c)) {
+                sb.append('%');
+                HEX.toHexDigits(sb, (byte)c);
+            } else {
+                sb.append(c);
+            }
+        }
+        return sb.toString();
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/util/DecimalDigits.class b/tests/test_data/std/jdk/internal/util/DecimalDigits.class
new file mode 100644
index 0000000000000000000000000000000000000000..c6e4c97e6edd58984c81b8cbe6450c2f13a0c341
GIT binary patch
literal 785
zcmZWn%Wl&^6g^`*b`lb5`k=IF=u4H_EO3GHkVpb0RjY^;5GmQPsgqdEq>h79r((&X
ze~>?5!-fs8KthNQK<xMdegmWeXG~NPvGClv_ntZT%o%_A_3<-+5|)zCpj$9fh`|)F
z+wQUJ_-=6EJgT?7MkrwBWgx?%fWEp`OCXMfg=7lnkP?`0HxC^dgkCRjeWxEv-`VmS
zvg7(&@<4`1JiS%kDeqMUv}asqp7euIcD$NAl6BwP41#XxhO!$Fxm+0`JMK8{S=*_G
zF7bB+j8eDh35-=_;63bj>RxY8bp*yM-G=Me+@4hVuxNxWN$SN>>i>0;IMGy!AG@;0
zA*<yzsuhx7Ss<Qo_(Kmgzss8HwRxo$0cLcLL(<gPINWugN3$(uPqNzW_Zr@|j0BE2
zb43}AtF%+&LkP?&LmAV|Ovdw!I(vK-W@F5*GYZC7?gPYIZZz0j)dK<*7}&)H?i2|@
z7{>%-0+W~;608%cdgeP=vp3#w_m@Ep0G|GH+Qdanvlhptv+>_JA;wzCZhlHU(DNBP
z`3f5udwqXU(2H4>Eo7P5@fU-eMvm=Pc7JZlcsZz@=;HP7?<a!m*W7zpO1vJ4&rv>5
zAn{$^{2nE5B7^%_;jej(``fG+vCYa(ByWSr6(VQom%)oI6Fp6?30CJ=(_rCNBwi3%
gK$dm@m-$V?IE7_lUYsH=#1Aa}Btl?;Jq?S00F?}q<NyEw

literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/util/DecimalDigits.java b/tests/test_data/std/jdk/internal/util/DecimalDigits.java
new file mode 100644
index 00000000..bdcbe15e
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/util/DecimalDigits.java
@@ -0,0 +1,87 @@
+/*
+ * Copyright (c) 2023, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package jdk.internal.util;
+
+import jdk.internal.vm.annotation.Stable;
+
+/**
+ * Digits class for decimal digits.
+ *
+ * @since 21
+ */
+public final class DecimalDigits {
+
+    /**
+     * Each element of the array represents the packaging of two ascii characters based on little endian:<p>
+     * <pre>
+     *      00 -> '0' | ('0' << 8) -> 0x3030
+     *      01 -> '1' | ('0' << 8) -> 0x3130
+     *      02 -> '2' | ('0' << 8) -> 0x3230
+     *
+     *     ...
+     *
+     *      10 -> '0' | ('1' << 8) -> 0x3031
+     *      11 -> '1' | ('1' << 8) -> 0x3131
+     *      12 -> '2' | ('1' << 8) -> 0x3231
+     *
+     *     ...
+     *
+     *      97 -> '7' | ('9' << 8) -> 0x3739
+     *      98 -> '8' | ('9' << 8) -> 0x3839
+     *      99 -> '9' | ('9' << 8) -> 0x3939
+     * </pre>
+     */
+    @Stable
+    private static final short[] DIGITS;
+
+    static {
+        short[] digits = new short[10 * 10];
+
+        for (int i = 0; i < 10; i++) {
+            short hi = (short) (i + '0');
+            for (int j = 0; j < 10; j++) {
+                short lo = (short) ((j + '0') << 8);
+                digits[i * 10 + j] = (short) (hi | lo);
+            }
+        }
+        DIGITS = digits;
+    }
+
+    /**
+     * Constructor.
+     */
+    private DecimalDigits() {
+    }
+
+    /**
+     * For values from 0 to 99 return a short encoding a pair of ASCII-encoded digit characters in little-endian
+     * @param i value to convert
+     * @return a short encoding a pair of ASCII-encoded digit characters
+     */
+    public static short digitPair(int i) {
+        return DIGITS[i];
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/util/HexDigits.class b/tests/test_data/std/jdk/internal/util/HexDigits.class
new file mode 100644
index 0000000000000000000000000000000000000000..7816222391a537ed27fba207fd3aaa912f4f779d
GIT binary patch
literal 2244
zcma)7YjYE27(H*YAx#Kn3!#<fA~zw4g%l`Np+GNKnh+?E*wNN;x=EIHOW4$0I;Epf
zMwsC%(|Q3fGxDWhL<L3#hjILd<0t(a{sR@P=iO}6R+-Vw?7sKsIp;jj^XBKjzW)J0
zAI^H=fYS}d2N%`|s1w?h7B6V#SbQ)$q30?BYq|{6s2mY+MxsL=G{EDA*N3(62?Qqc
z=i`Q1(MzUQh*v8{AwHl_A2Y^`N|`5*C5|UDX#vMb+O=4F=%)58E_K#Rn|>cQp_x9C
zsUCqHsa1BhTuv{S<4HnG5m}ElJhT?iVY3^pJ_HaH*!JH?1bma#O5eCvdM(qxw^P6!
z8R<<VqC;MU@w^*beAtR@0*%Weq>AR4fZwcM$m*rRb17ZR8|K)sUMiBG5=llAUhKdN
zZtV177a{^%p9LdLmwG;}=SsTNrD;sBtR^F{GZOtjqy;vgt(q0%f<9!Fjch^hG0kE{
zs~AO-hPSUaF?AuX)tBSxipKqi2)nPC*9F$63{yX45zELGfeoo*PAd#)B}0zwNu@Gw
z&~#|E>D8g8QBPh5{j_G31YD8Ca5OC-4894Dt2wPq`(l{y6ko2bBb?m%liH;1#yiR3
zQsU4+BFck~Y`gsIm61yDi6-T6pZx4+m?)zRW;sRvrnM=V80nP<mB|{ADXmbIj(N^y
zn0bAgNtvylJEs$+W2BcO3pV+!TQX*+hPPZPG16&chUXi)as|5x9OIJI1dkVrZdn4}
zbg^2>>HUUOu(6)~dt?q_FH_sWe0QK#<~Mt-vTz^}Wq%FZ7+blA)yL6`9PMW-*t%lh
zLEL4>fi`|+p#pC}!7z5SCyj6u_8`vIgLXQr8Mp{1e?aIS+^tPmyma7j;3m{yu&KNI
zk}{K@TYwV$f*YKc;byBOO*$x|5tFQ@w-IDtI@wY)gndLMpAb55fNs3lh)%pjNH24i
z_@5vkx|s!d1qW>yCkRzSZmGjyCt%@G)#+IYpvFuR2WBjX&9x&qWIJp@mnDcaeAqVp
z4go7X(eZ4<*Ek)t++0()T)e_j$R4#{ymIFsUf;94#%lKJUOQ~B^noMvFKKk(D0@y)
z>_(4`<ToOb*H|{}$GXd&`I~5?yYO|(U#GJBs$(&@Nl_bSZe;BKjZ9c=c=zbS;xBTe
zAL}n)Kd^eEA5G!;PoUZdq^TR372(>$1Onz5f_Wy?``CsLm^L3W{vQ$FEu#DwC-5oK
z_za`?+~U_kl+8@NUWQC6m*vfWjIHdwYV*sYAIHh>D7IsObBY~WC-yx-n+$DYiMR0D
zyl3mYyH@hPhmFhBAEHIU@{HtTP1!p9xKfAZZBjF9n=J>EXvwCfh_&`FRlcMuUy<q8
zh~O@xd5^KWPp;o!5Z{vP15Dr{F5%G%Rbo^{vIS=As?63^nYC3JWOXg8;-yZ1qW1|7
zN?nqSL9O!6(2mR%f7mmB3vOirKD96W0HM5VX1U-Rt)hBNtUs}g9$Q#y)$F$s$f9z=
z;T_=B!(iGsgK*NkOgG~Jw%^CbCV@wu6V9%Hs@_IApn7k^8&KOv7i8njtJ>(?Vds&M
zT#bjU)lhAf1G%a;OwV;Hv4DFzG`dL%&dv>8b&7?>U#|*&@5JuIEpMONB~i<|U4$~g
zn<oiBVa0Hg7sDx}sP60Rzs31H^KKlOy1psyPFY#k#=R%0w3FvLcuHO#jTo}77XC5g
kP0KQ@tZPNXQ#86UC^qzqr*I0{{*IPENMGPIQ8{qtZ{bI^L;wH)

literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/util/HexDigits.java b/tests/test_data/std/jdk/internal/util/HexDigits.java
new file mode 100644
index 00000000..07544357
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/util/HexDigits.java
@@ -0,0 +1,202 @@
+/*
+ * Copyright (c) 2023, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package jdk.internal.util;
+
+import jdk.internal.access.JavaLangAccess;
+import jdk.internal.access.SharedSecrets;
+import jdk.internal.vm.annotation.Stable;
+
+/**
+ * Digits provides a fast methodology for converting integers and longs to
+ * hexadecimal digits ASCII strings.
+ *
+ * @since 21
+ */
+public final class HexDigits {
+    private static final JavaLangAccess JLA = SharedSecrets.getJavaLangAccess();
+
+    /**
+     * Each element of the array represents the ascii encoded
+     * hex relative to its index, for example:<p>
+     * <pre>
+     *       0 -> '00' -> '0' | ('0' << 8) -> 0x3030
+     *       1 -> '01' -> '0' | ('1' << 8) -> 0x3130
+     *       2 -> '02' -> '0' | ('2' << 8) -> 0x3230
+     *
+     *     ...
+     *
+     *      10 -> '0a' -> '0' | ('a' << 8) -> 0x6130
+     *      11 -> '0b' -> '0' | ('b' << 8) -> 0x6230
+     *      12 -> '0c' -> '0' | ('b' << 8) -> 0x6330
+     *
+     *     ...
+     *
+     *      26 -> '1a' -> '1' | ('a' << 8) -> 0x6131
+     *      27 -> '1b' -> '1' | ('b' << 8) -> 0x6231
+     *      28 -> '1c' -> '1' | ('c' << 8) -> 0x6331
+     *
+     *     ...
+     *
+     *     253 -> 'fd' -> 'f' | ('d' << 8) -> 0x6466
+     *     254 -> 'fe' -> 'f' | ('e' << 8) -> 0x6566
+     *     255 -> 'ff' -> 'f' | ('f' << 8) -> 0x6666
+     * </pre>
+     */
+    @Stable
+    private static final short[] DIGITS;
+
+    static {
+        short[] digits = new short[16 * 16];
+
+        for (int i = 0; i < 16; i++) {
+            short lo = (short) (i < 10 ? i + '0' : i - 10 + 'a');
+
+            for (int j = 0; j < 16; j++) {
+                short hi = (short) ((j < 10 ? j + '0' : j - 10 + 'a') << 8);
+                digits[(i << 4) + j] = (short) (hi | lo);
+            }
+        }
+
+        DIGITS = digits;
+    }
+
+    /**
+     * Constructor.
+     */
+    private HexDigits() {
+    }
+
+    /**
+     * For values from 0 to 255 return a short encoding a pair of hex ASCII-encoded digit characters in little-endian
+     * @param i value to convert
+     * @param ucase true uppper case, false lower case
+     * @return a short encoding a pair of hex ASCII-encoded digit characters
+     */
+    public static short digitPair(int i, boolean ucase) {
+        /*
+         * 0b0100_0000_0100_0000 is a selector that selects letters (1 << 6),
+         * uppercase or not, and shifting it right by 1 bit incidentally
+         * becomes a bit offset between cases (1 << 5).
+         *
+         *  ([0-9] & 0b100_0000) >> 1 => 0
+         *  ([a-f] & 0b100_0000) >> 1 => 32
+         *
+         *  [0-9] -  0 => [0-9]
+         *  [a-f] - 32 => [A-F]
+         */
+        short v = DIGITS[i & 0xff];
+        return ucase
+                ? (short) (v - ((v & 0b0100_0000_0100_0000) >> 1))
+                : v;
+    }
+
+    /**
+     * Return a little-endian packed integer for the 4 ASCII bytes for an input unsigned 2-byte integer.
+     * {@code b0} is the most significant byte and {@code b1} is the least significant byte.
+     * The integer is passed byte-wise to allow reordering of execution.
+     */
+    public static int packDigits(int b0, int b1) {
+        return DIGITS[b0 & 0xff] | (DIGITS[b1 & 0xff] << 16);
+    }
+
+    /**
+     * Return a little-endian packed long for the 8 ASCII bytes for an input unsigned 4-byte integer.
+     * {@code b0} is the most significant byte and {@code b3} is the least significant byte.
+     * The integer is passed byte-wise to allow reordering of execution.
+     */
+    public static long packDigits(int b0, int b1, int b2, int b3) {
+        return DIGITS[b0 & 0xff]
+                | (DIGITS[b1 & 0xff] << 16)
+                | (((long) DIGITS[b2 & 0xff]) << 32)
+                | (((long) DIGITS[b3 & 0xff]) << 48);
+    }
+
+    /**
+     * Insert digits for long value in buffer from high index to low index.
+     *
+     * @param value      value to convert
+     * @param index      insert point + 1
+     * @param buffer     byte buffer to copy into
+     *
+     * @return the last index used
+     */
+    public static int getCharsLatin1(long value, int index, byte[] buffer) {
+        while ((value & ~0xFF) != 0) {
+            short pair = DIGITS[((int) value) & 0xFF];
+            buffer[--index] = (byte)(pair >> 8);
+            buffer[--index] = (byte)(pair);
+            value >>>= 8;
+        }
+
+        int digits = DIGITS[(int) (value & 0xFF)];
+        buffer[--index] = (byte) (digits >> 8);
+
+        if (0xF < value) {
+            buffer[--index] = (byte) (digits & 0xFF);
+        }
+
+        return index;
+    }
+
+    /**
+     * Insert digits for long value in buffer from high index to low index.
+     *
+     * @param value      value to convert
+     * @param index      insert point + 1
+     * @param buffer     byte buffer to copy into
+     *
+     * @return the last index used
+     */
+    public static int getCharsUTF16(long value, int index, byte[] buffer) {
+        while ((value & ~0xFF) != 0) {
+            int pair = (int) DIGITS[((int) value) & 0xFF];
+            JLA.putCharUTF16(buffer, --index, pair >> 8);
+            JLA.putCharUTF16(buffer, --index, pair & 0xFF);
+            value >>>= 8;
+        }
+
+        int digits = DIGITS[(int) (value & 0xFF)];
+        JLA.putCharUTF16(buffer, --index, (byte) (digits >> 8));
+
+        if (0xF < value) {
+            JLA.putCharUTF16(buffer, --index, (byte) (digits & 0xFF));
+        }
+
+        return index;
+    }
+
+    /**
+     * Calculate the number of digits required to represent the long.
+     *
+     * @param value value to convert
+     *
+     * @return number of digits
+     */
+    public static int stringSize(long value) {
+        return value == 0 ? 1 :
+                67 - Long.numberOfLeadingZeros(value) >> 2;
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/util/ImmutableBitSetPredicate$SmallImmutableBitSetPredicate.class b/tests/test_data/std/jdk/internal/util/ImmutableBitSetPredicate$SmallImmutableBitSetPredicate.class
new file mode 100644
index 0000000000000000000000000000000000000000..c119a6cb12f74a7b4821860644079922526d1850
GIT binary patch
literal 2112
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zh4R9m;044ZQh6v6m0BU?fgiwcst{*(H;GX`=tCZMX7<j#_uO+o=I?)Y{sORo&kIN)
zZNexbgRDSh(|%xEuI;T`U&^i@^aQeVj_0WB0_j?PHIE$fCJIH2peV4o+1s)lPszZu
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diff --git a/tests/test_data/std/jdk/internal/util/ImmutableBitSetPredicate.class b/tests/test_data/std/jdk/internal/util/ImmutableBitSetPredicate.class
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diff --git a/tests/test_data/std/jdk/internal/util/ImmutableBitSetPredicate.java b/tests/test_data/std/jdk/internal/util/ImmutableBitSetPredicate.java
new file mode 100644
index 00000000..f0def800
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/util/ImmutableBitSetPredicate.java
@@ -0,0 +1,114 @@
+/*
+ * Copyright (c) 2023, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package jdk.internal.util;
+
+import jdk.internal.ValueBased;
+import jdk.internal.vm.annotation.Stable;
+
+import java.util.BitSet;
+import java.util.function.IntPredicate;
+
+/**
+ * Class for working with immutable BitSets.
+ */
+@ValueBased
+public class ImmutableBitSetPredicate implements IntPredicate {
+
+    @Stable
+    private final long[] words;
+
+    private ImmutableBitSetPredicate(BitSet original) {
+        // If this class is made public, we need to do
+        // a defensive array copy as certain BitSet implementations
+        // may return a shared array. The spec says the array should be _new_ though but
+        // the consequences might be unspecified for a malicious BitSet.
+        this.words = original.toLongArray();
+    }
+
+    /**
+     * @param bitIndex the bit index to test
+     * @return true if the bit is in the range of the BitSet and the bit is set, otherwise false
+     */
+    @Override
+    public boolean test(int bitIndex) {
+        if (bitIndex < 0) {
+            return false;
+        }
+
+        int wordIndex = bitIndex >> 6;
+        return (wordIndex < words.length)
+                && ((words[wordIndex] & (1L << bitIndex)) != 0);
+    }
+
+    /**
+     * {@return a new {@link IntPredicate } representing the {@link BitSet#get(int)} method applied
+     * on an immutable snapshot of the current state of this BitSet}.
+     * <p>
+     * If the returned predicate is invoked with a {@code bitIndex} that is negative, the predicate
+     * will throw an IndexOutOfBoundsException just as the {@link BitSet#get(int)} method would.
+     * <p>
+     * Returned predicates are threadsafe and can be used without external synchronisation.
+     *
+     * @implNote The method is free to return a {@link ValueBased} implementation.
+     *
+     * @since 22
+     */
+    public static IntPredicate of(BitSet original) {
+        if (original.size() <= 128) {
+            long[] array = original.toLongArray();
+            return new SmallImmutableBitSetPredicate(
+                    array.length > 0 ? array[0] : 0L,
+                    array.length > 1 ? array[1] : 0L);
+        }
+        return new ImmutableBitSetPredicate(original);
+    }
+
+    /**
+     * Specialization for small sets of 128 bits or less
+     * @param first - bits index 0 through 63, inclusive
+     * @param second - bits index 64 through 127, inclusive
+     */
+    public record SmallImmutableBitSetPredicate(long first, long second) implements IntPredicate {
+
+        /**
+         * @param bitIndex the bit index to test
+         * @return true if the bit is in the range of the BitSet and the bit is set, otherwise false
+         */
+        @Override
+        public boolean test(int bitIndex) {
+            if (bitIndex < 0) {
+                return false;
+            }
+
+            int wordIndex = bitIndex >> 6;
+            if (wordIndex > 1) {
+                return false;
+            }
+            long bits = wordIndex == 0 ? first : second;
+            return (bits & (1L << bitIndex)) != 0;
+        }
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/util/NullableKeyValueHolder.class b/tests/test_data/std/jdk/internal/util/NullableKeyValueHolder.class
new file mode 100644
index 0000000000000000000000000000000000000000..8a3b531a6f7414c13c434ac136030ece584d3fb7
GIT binary patch
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diff --git a/tests/test_data/std/jdk/internal/util/NullableKeyValueHolder.java b/tests/test_data/std/jdk/internal/util/NullableKeyValueHolder.java
new file mode 100644
index 00000000..b81606b6
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/util/NullableKeyValueHolder.java
@@ -0,0 +1,166 @@
+/*
+ * Copyright (c) 2023, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package jdk.internal.util;
+
+import java.util.Map;
+import java.util.Objects;
+
+/**
+ * An immutable container for a key and a value, both of which are nullable.
+ *
+ * <p>This is a <a href="{@docRoot}/java.base/java/lang/doc-files/ValueBased.html">value-based</a>
+ * class; programmers should treat instances that are
+ * {@linkplain #equals(Object) equal} as interchangeable and should not
+ * use instances for synchronization, or unpredictable behavior may
+ * occur. For example, in a future release, synchronization may fail.
+ *
+ * @apiNote
+ * This class is not exported. Instances are created by various Map implementations
+ * when they need a Map.Entry that isn't connected to the Map.
+ *
+ * <p>This class differs from AbstractMap.SimpleImmutableEntry in that it is not
+ * serializable and that it is final. This class differs from java.util.KeyValueHolder
+ * in that the key and value are nullable.
+ *
+ * <p>In principle this class could be a variation on KeyValueHolder. However,
+ * making that class selectively support nullable keys and values is quite intricate.
+ * Various specifications (such as Map.ofEntries and Map.entry) specify non-nullability
+ * of the key and the value. Map.Entry.copyOf also requires non-null keys and values;
+ * but it simply passes through KeyValueHolder instances, assuming their keys and values
+ * are non-nullable. If a KVH with nullable keys and values were introduced, some way
+ * to distinguish it would be necessary. This could be done by introducing a subclass
+ * (requiring KVH to be made non-final) or by introducing some kind of "mode" field
+ * (potentially increasing the size of every KVH instance, though another field could
+ * probably fit into the object's padding in most JVMs.) More critically, a mode field
+ * would have to be checked in all the right places to get the right behavior.
+ *
+ * <p>A longer range possibility is to selectively relax the restrictions against nulls in
+ * Map.entry and Map.Entry.copyOf. This would also require some intricate specification
+ * changes and corresponding implementation changes (e.g., the implementations backing
+ * Map.of might still need to reject nulls, and so would Map.ofEntries) but allowing
+ * a Map.Entry itself to contain nulls seems beneficial in general. If this is done,
+ * merging KeyValueHolder and NullableKeyValueHolder should be reconsidered.
+ *
+ * @param <K> the key type
+ * @param <V> the value type
+ */
+@jdk.internal.ValueBased
+public final class NullableKeyValueHolder<K,V> implements Map.Entry<K,V> {
+    final K key;
+    final V value;
+
+    /**
+     * Constructs a NullableKeyValueHolder.
+     *
+     * @param k the key, may be null
+     * @param v the value, may be null
+     */
+    public NullableKeyValueHolder(K k, V v) {
+        key = k;
+        value = v;
+    }
+
+    /**
+     * Constructs a NullableKeyValueHolder from a Map.Entry. No need for an
+     * idempotent copy at this time.
+     *
+     * @param entry the entry, must not be null
+     */
+    public NullableKeyValueHolder(Map.Entry<K,V> entry) {
+        Objects.requireNonNull(entry);
+        key = entry.getKey();
+        value = entry.getValue();
+    }
+
+    /**
+     * Gets the key from this holder.
+     *
+     * @return the key, may be null
+     */
+    @Override
+    public K getKey() {
+        return key;
+    }
+
+    /**
+     * Gets the value from this holder.
+     *
+     * @return the value, may be null
+     */
+    @Override
+    public V getValue() {
+        return value;
+    }
+
+    /**
+     * Throws {@link UnsupportedOperationException}.
+     *
+     * @param value ignored
+     * @return never returns normally
+     */
+    @Override
+    public V setValue(V value) {
+        throw new UnsupportedOperationException("not supported");
+    }
+
+    /**
+     * Compares the specified object with this entry for equality.
+     * Returns {@code true} if the given object is also a map entry and
+     * the two entries' keys and values are equal.
+     */
+    @Override
+    public boolean equals(Object o) {
+        return o instanceof Map.Entry<?, ?> e
+                && Objects.equals(key, e.getKey())
+                && Objects.equals(value, e.getValue());
+    }
+
+    private int hash(Object obj) {
+        return (obj == null) ? 0 : obj.hashCode();
+    }
+
+    /**
+     * Returns the hash code value for this map entry. The hash code
+     * is {@code key.hashCode() ^ value.hashCode()}.
+     */
+    @Override
+    public int hashCode() {
+        return hash(key) ^ hash(value);
+    }
+
+    /**
+     * Returns a String representation of this map entry.  This
+     * implementation returns the string representation of this
+     * entry's key followed by the equals character ("{@code =}")
+     * followed by the string representation of this entry's value.
+     *
+     * @return a String representation of this map entry
+     */
+    @Override
+    public String toString() {
+        return key + "=" + value;
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/util/OSVersion.class b/tests/test_data/std/jdk/internal/util/OSVersion.class
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/util/OSVersion.java b/tests/test_data/std/jdk/internal/util/OSVersion.java
new file mode 100644
index 00000000..0f4abd89
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/util/OSVersion.java
@@ -0,0 +1,137 @@
+/*
+ * Copyright (c) 2023, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package jdk.internal.util;
+
+/**
+ * A software Version with major, minor, and micro components.
+ * @param major major version
+ * @param minor minor version
+ * @param micro micro version
+ */
+public record OSVersion(int major, int minor, int micro) implements Comparable<OSVersion> {
+
+    // Parse and save the current OS version
+    private static final OSVersion CURRENT_OSVERSION = initVersion();
+
+    /**
+     * {@return a Version for major, minor versions}
+     *
+     * @param major major version
+     * @param minor minor version
+     */
+    public OSVersion(int major, int minor) {
+        this(major, minor, 0);
+    }
+
+    /*
+     * Initialize the current Version from the os.version system property
+     */
+    private static OSVersion initVersion() {
+        final String osVer = StaticProperty.osVersion();
+        try {
+            return parse(osVer);
+        } catch (IllegalArgumentException iae) {
+            throw new InternalError("os.version malformed: " + osVer, iae);
+        }
+    }
+
+    /**
+     * {@return the current operating system version}
+     */
+    public static OSVersion current() {
+        return CURRENT_OSVERSION;
+    }
+
+    /**
+     * {@return Compare this version with another version}
+     *
+     * @param other the object to be compared
+     */
+    @Override
+    public int compareTo(OSVersion other) {
+        int result = Integer.compare(major, other.major);
+        if (result == 0) {
+            result = Integer.compare(minor, other.minor);
+            if (result == 0) {
+                return Integer.compare(micro, other.micro);
+            }
+        }
+        return result;
+    }
+
+    @Override
+    public String toString() {
+        return (micro == 0)
+                ? major + "." + minor
+                : major + "." + minor + "." + micro;
+    }
+
+    /**
+     * {@return A Version parsed from a version string split on "." characters}
+     * Only major, minor, and micro version numbers are parsed, finer detail is ignored.
+     * Missing values for minor and micro are replaced with zero.
+     * The string must start with a number, if there is a '.' it must be followed by a number.
+     * <p>
+     * Parsed by hand because it is called before RegEx can be initialized safely.
+     *
+     * @param str a version string
+     * @throws IllegalArgumentException if the string does not start with digits
+     *          or digits do not follow '.'
+     */
+    public static OSVersion parse(String str) throws IllegalArgumentException {
+        int len = str.length();
+        int majorStart = 0;
+        int majorEnd = skipDigits(str, majorStart);
+        int major = Integer.parseInt(str.substring(majorStart, majorEnd));
+
+        int minor = 0, micro = 0;
+        if (majorEnd < len && str.charAt(majorEnd) == '.') {
+            int minorStart = majorEnd + 1;
+            int minorEnd = skipDigits(str, minorStart);
+            minor = Integer.parseInt(str.substring(minorStart, minorEnd));
+
+            if (minorEnd < len && str.charAt(minorEnd) == '.') {
+                int microStart = minorEnd + 1;
+                int microEnd = skipDigits(str, microStart);
+                micro = Integer.parseInt(str.substring(microStart, microEnd));
+            }
+        }
+        return new OSVersion(major, minor, micro);
+    }
+
+    /**
+     * {@return The index of the first non-digit from start}
+     * @throws IllegalArgumentException if there are no digits
+     */
+    private static int skipDigits(String s, int start) {
+        int index = start;
+        while (index < s.length() && Character.isDigit(s.charAt(index))) {
+            index++;
+        }
+        if (index == start)
+            throw new IllegalArgumentException("malformed version, missing digits: " + s);
+        return index;
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/util/OctalDigits.class b/tests/test_data/std/jdk/internal/util/OctalDigits.class
new file mode 100644
index 0000000000000000000000000000000000000000..a28199e4d85e1b19f2d0215fae1b2822aa77ed0f
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/util/OctalDigits.java b/tests/test_data/std/jdk/internal/util/OctalDigits.java
new file mode 100644
index 00000000..97b1f882
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/util/OctalDigits.java
@@ -0,0 +1,130 @@
+/*
+ * Copyright (c) 2023, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package jdk.internal.util;
+
+import jdk.internal.access.JavaLangAccess;
+import jdk.internal.access.SharedSecrets;
+import jdk.internal.vm.annotation.Stable;
+
+/**
+ * Digits class for octal digits.
+ *
+ * @since 21
+ */
+public final class OctalDigits {
+    private static final JavaLangAccess JLA = SharedSecrets.getJavaLangAccess();
+
+    @Stable
+    private static final short[] DIGITS;
+
+    static {
+        short[] digits = new short[8 * 8];
+
+        for (int i = 0; i < 8; i++) {
+            short lo = (short) (i + '0');
+
+            for (int j = 0; j < 8; j++) {
+                short hi = (short) ((j + '0') << 8);
+                digits[(i << 3) + j] = (short) (hi | lo);
+            }
+        }
+
+        DIGITS = digits;
+    }
+
+    /**
+     * Constructor.
+     */
+    private OctalDigits() {
+    }
+
+    /**
+     * Insert digits for long value in buffer from high index to low index.
+     *
+     * @param value      value to convert
+     * @param index      insert point + 1
+     * @param buffer     byte buffer to copy into
+     *
+     * @return the last index used
+     */
+    public static int getCharsLatin1(long value, int index, byte[] buffer){
+        while ((value & ~0x3F) != 0) {
+            int digits = DIGITS[((int) value) & 0x3F];
+            value >>>= 6;
+            buffer[--index] = (byte) (digits >> 8);
+            buffer[--index] = (byte) (digits & 0xFF);
+        }
+
+        int digits = DIGITS[(int) (value & 0x3F)];
+        buffer[--index] = (byte) (digits >> 8);
+
+        if (7 < value) {
+            buffer[--index] = (byte) (digits & 0xFF);
+        }
+
+        return index;
+    }
+
+
+    /**
+     * This is a variant of {@link OctalDigits#getCharsLatin1(long, int, byte[])}, but for
+     * UTF-16 coder.
+     *
+     * @param value      value to convert
+     * @param index      insert point + 1
+     * @param buffer     byte buffer to copy into
+     *
+     * @return the last index used
+     */
+    public static int getCharsUTF16(long value, int index, byte[] buffer){
+        while ((value & ~0x3F) != 0) {
+            int pair = (int) DIGITS[((int) value) & 0x3F];
+            JLA.putCharUTF16(buffer, --index, pair >> 8);
+            JLA.putCharUTF16(buffer, --index, pair & 0xFF);
+            value >>>= 6;
+        }
+
+        int digits = DIGITS[(int) (value & 0x3F)];
+        JLA.putCharUTF16(buffer, --index, digits >> 8);
+
+        if (7 < value) {
+            JLA.putCharUTF16(buffer, --index, digits & 0xFF);
+        }
+
+        return index;
+    }
+
+    /**
+     * Calculate the number of digits required to represent the long.
+     *
+     * @param value value to convert
+     *
+     * @return number of digits
+     */
+    public static int stringSize(long value) {
+        return value == 0 ? 1 : ((66 - Long.numberOfLeadingZeros(value)) / 3);
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/util/OperatingSystem.class b/tests/test_data/std/jdk/internal/util/OperatingSystem.class
new file mode 100644
index 0000000000000000000000000000000000000000..d0a94d7a50bd8709bd8f50bd522928d3567717d9
GIT binary patch
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/util/OperatingSystem.java b/tests/test_data/std/jdk/internal/util/OperatingSystem.java
new file mode 100644
index 00000000..927ab682
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/util/OperatingSystem.java
@@ -0,0 +1,136 @@
+/*
+ * Copyright (c) 2023, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package jdk.internal.util;
+
+import java.util.Locale;
+import jdk.internal.util.PlatformProps;
+import jdk.internal.vm.annotation.ForceInline;
+
+/**
+ * Enumeration of operating system types and testing for the current OS.
+ * The enumeration can be used to dispatch to OS specific code or values.
+ * Checking if a specific operating system is current uses a simple
+ * static method for each operating system.
+ * <p>
+ * For example,
+ * {@snippet lang = "java":
+ * if (OperatingSystem.isWindows()) {
+ *     // Windows only code.
+ * } else if (OperatingSystem.isLinux()) {
+ *     // Linux only code
+ * }
+ *}
+ *
+ * Alternatively, compare with the {@linkplain #current() current} operating system.
+ * For example,
+ * {@snippet lang = "java":
+ * if (OperatingSystem.current() == OperatingSystem.WINDOWS) {
+ *     // Windows only code.
+ * }
+ *}
+ * Dispatch based on the current operating system or choose a value.
+ * For example,
+ * {@snippet lang = "java":
+ * int port() {
+ *      return switch(OperatingSystem.current()) {
+ *          case LINUX->32768;
+ *          case AIX->32768;
+ *          case MACOS->49152;
+ *          case WINDOWS->49152;
+ *      };
+ * }
+ *}
+ */
+public enum OperatingSystem {
+
+    /**
+     * Operating systems based on the Linux kernel.
+     */
+    LINUX,
+    /**
+     * The Mac OS X Operating system.
+     */
+    MACOS,
+    /**
+     * The Windows Operating system.
+     */
+    WINDOWS,
+    /**
+     * The AIX Operating system.
+     */
+    AIX,
+    ;
+
+    // The current OperatingSystem
+    private static final OperatingSystem CURRENT_OS = initOS();
+
+    /**
+     * {@return {@code true} if built for the Linux operating system}
+     */
+    @ForceInline
+    public static boolean isLinux() {
+        return PlatformProps.TARGET_OS_IS_LINUX;
+    }
+
+    /**
+     * {@return {@code true} if built for the Mac OS X operating system}
+     */
+    @ForceInline
+    public static boolean isMacOS() {
+        return PlatformProps.TARGET_OS_IS_MACOS;
+    }
+
+    /**
+     * {@return {@code true} if built for the Windows operating system}
+     */
+    @ForceInline
+    public static boolean isWindows() {
+        return PlatformProps.TARGET_OS_IS_WINDOWS;
+    }
+
+    /**
+     * {@return {@code true} if built for the AIX operating system}
+     */
+    @ForceInline
+    public static boolean isAix() {
+        return PlatformProps.TARGET_OS_IS_AIX;
+    }
+
+    /**
+     * {@return the current operating system}
+     */
+    public static OperatingSystem current() {
+        return CURRENT_OS;
+    }
+
+    /**
+     * Returns the OperatingSystem of the build.
+     * Build time names are mapped to respective uppercase enum values.
+     * Names not recognized throw ExceptionInInitializerError with IllegalArgumentException.
+     */
+    private static OperatingSystem initOS() {
+        return OperatingSystem.valueOf(PlatformProps.CURRENT_OS_STRING.toUpperCase(Locale.ROOT));
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/util/PlatformProps.class b/tests/test_data/std/jdk/internal/util/PlatformProps.class
new file mode 100644
index 0000000000000000000000000000000000000000..bc3a1c3d7d4ed394dab8f5545cf1f0a9ca37300f
GIT binary patch
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HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/util/PlatformProps.java b/tests/test_data/std/jdk/internal/util/PlatformProps.java
new file mode 100644
index 00000000..18b3288a
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/util/PlatformProps.java
@@ -0,0 +1,69 @@
+/*
+ * Copyright (c) 2023, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package jdk.internal.util;
+
+/**
+ * The corresponding source file is generated by GensrcMisc.gmk for java.base.
+ * @see OperatingSystem
+ * @see Architecture
+ */
+class PlatformProps {
+
+    // Name of the current OperatingSystem enum as substituted by the build
+    static final String CURRENT_OS_STRING = "macos";
+
+    // Precomputed booleans for each Operating System
+    static final boolean TARGET_OS_IS_LINUX   = "macos" == "linux";
+    static final boolean TARGET_OS_IS_MACOS   = "macos" == "macos";
+    static final boolean TARGET_OS_IS_WINDOWS = "macos" == "windows";
+    static final boolean TARGET_OS_IS_AIX     = "macos" == "aix";
+
+    // The Architecture value for the current architecture
+    static final String CURRENT_ARCH_STRING = "aarch64";
+
+    // Architecture.is64Bit() uses this value
+    static final int TARGET_ARCH_BITS = 64;
+
+    // Architecture.isLittleEndian value from the build
+    static final boolean TARGET_ARCH_LITTLE_ENDIAN = "little" == "little";
+
+    // Precomputed booleans for each Architecture, shared with jdk.internal.util.Architecture
+    // The variables are named to match the Architecture value names, and
+    // the values chosen to match the build values.
+    static final boolean TARGET_ARCH_IS_AARCH64 = "aarch64" == "aarch64";
+    static final boolean TARGET_ARCH_IS_ARM     = "aarch64" == "arm";
+    static final boolean TARGET_ARCH_IS_LOONGARCH64 = "aarch64" == "loongarch64";
+    static final boolean TARGET_ARCH_IS_MIPSEL  = "aarch64" == "mipsel";
+    static final boolean TARGET_ARCH_IS_MIPS64EL= "aarch64" == "mips64el";
+    static final boolean TARGET_ARCH_IS_PPC     = "aarch64" == "ppc";
+    static final boolean TARGET_ARCH_IS_PPC64   = "aarch64" == "ppc64";
+    static final boolean TARGET_ARCH_IS_PPC64LE = "aarch64" == "ppc64le";
+    static final boolean TARGET_ARCH_IS_RISCV64 = "aarch64" == "riscv64";
+    static final boolean TARGET_ARCH_IS_S390    = "aarch64" == "s390";
+    static final boolean TARGET_ARCH_IS_SPARCV9 = "aarch64" == "sparcv9";
+    static final boolean TARGET_ARCH_IS_X86     = "aarch64" == "x86";
+    static final boolean TARGET_ARCH_IS_X64     = "aarch64" == "x64";
+
+}
diff --git a/tests/test_data/std/jdk/internal/util/Preconditions$1.class b/tests/test_data/std/jdk/internal/util/Preconditions$1.class
new file mode 100644
index 0000000000000000000000000000000000000000..936434cdd7bea276306719bbb9e0eb476220a0da
GIT binary patch
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diff --git a/tests/test_data/std/jdk/internal/util/Preconditions$2.class b/tests/test_data/std/jdk/internal/util/Preconditions$2.class
new file mode 100644
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GIT binary patch
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diff --git a/tests/test_data/std/jdk/internal/util/Preconditions$3.class b/tests/test_data/std/jdk/internal/util/Preconditions$3.class
new file mode 100644
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diff --git a/tests/test_data/std/jdk/internal/util/Preconditions$4.class b/tests/test_data/std/jdk/internal/util/Preconditions$4.class
new file mode 100644
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diff --git a/tests/test_data/std/jdk/internal/util/Preconditions.class b/tests/test_data/std/jdk/internal/util/Preconditions.class
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/util/Preconditions.java b/tests/test_data/std/jdk/internal/util/Preconditions.java
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+/*
+ * Copyright (c) 2016, 2022, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package jdk.internal.util;
+
+import jdk.internal.vm.annotation.IntrinsicCandidate;
+
+import java.util.List;
+import java.util.function.BiFunction;
+import java.util.function.Function;
+
+/**
+ * Utility methods to check if state or arguments are correct.
+ *
+ */
+public class Preconditions {
+
+    /**
+     * Utility exception formatters which can be used in {@code Preconditions}
+     * check functions below.
+     *
+     * These anonymous inner classes can be syntactically replaced by lambda
+     * expression or method reference, but it's not feasible in practices,
+     * because {@code Preconditions} is used in many fundamental classes such
+     * as {@code java.lang.String}, lambda expressions or method references
+     * exercise many other code at VM startup, this could lead a recursive
+     * calls when fundamental classes is used in lambda expressions or method
+     * references.
+     */
+    public static final BiFunction<String, List<Number>, StringIndexOutOfBoundsException>
+            SIOOBE_FORMATTER = Preconditions.outOfBoundsExceptionFormatter(new Function<>() {
+        @Override
+        public StringIndexOutOfBoundsException apply(String s) {
+            return new StringIndexOutOfBoundsException(s);
+        }
+    });
+
+    public static final BiFunction<String, List<Number>, ArrayIndexOutOfBoundsException>
+            AIOOBE_FORMATTER = Preconditions.outOfBoundsExceptionFormatter(new Function<>() {
+        @Override
+        public ArrayIndexOutOfBoundsException apply(String s) {
+            return new ArrayIndexOutOfBoundsException(s);
+        }
+    });
+
+    public static final BiFunction<String,List<Number>, IndexOutOfBoundsException>
+            IOOBE_FORMATTER = Preconditions.outOfBoundsExceptionFormatter(new Function<>() {
+        @Override
+        public IndexOutOfBoundsException apply(String s) {
+            return new IndexOutOfBoundsException(s);
+        }
+    });
+
+    /**
+     * Maps out-of-bounds values to a runtime exception.
+     *
+     * @param checkKind the kind of bounds check, whose name may correspond
+     *        to the name of one of the range check methods, checkIndex,
+     *        checkFromToIndex, checkFromIndexSize
+     * @param args the out-of-bounds arguments that failed the range check.
+     *        If the checkKind corresponds to the name of a range check method
+     *        then the bounds arguments are those that can be passed in order
+     *        to the method.
+     * @param oobef the exception formatter that when applied with a checkKind
+     *        and a list out-of-bounds arguments returns a runtime exception.
+     *        If {@code null} then, it is as if an exception formatter was
+     *        supplied that returns {@link IndexOutOfBoundsException} for any
+     *        given arguments.
+     * @return the runtime exception
+     */
+    private static RuntimeException outOfBounds(
+            BiFunction<String, List<Number>, ? extends RuntimeException> oobef,
+            String checkKind,
+            Number... args) {
+        List<Number> largs = List.of(args);
+        RuntimeException e = oobef == null
+                             ? null : oobef.apply(checkKind, largs);
+        return e == null
+               ? new IndexOutOfBoundsException(outOfBoundsMessage(checkKind, largs)) : e;
+    }
+
+    private static RuntimeException outOfBoundsCheckIndex(
+            BiFunction<String, List<Number>, ? extends RuntimeException> oobe,
+            int index, int length) {
+        return outOfBounds(oobe, "checkIndex", index, length);
+    }
+
+    private static RuntimeException outOfBoundsCheckFromToIndex(
+            BiFunction<String, List<Number>, ? extends RuntimeException> oobe,
+            int fromIndex, int toIndex, int length) {
+        return outOfBounds(oobe, "checkFromToIndex", fromIndex, toIndex, length);
+    }
+
+    private static RuntimeException outOfBoundsCheckFromIndexSize(
+            BiFunction<String, List<Number>, ? extends RuntimeException> oobe,
+            int fromIndex, int size, int length) {
+        return outOfBounds(oobe, "checkFromIndexSize", fromIndex, size, length);
+    }
+
+    private static RuntimeException outOfBoundsCheckIndex(
+            BiFunction<String, List<Number>, ? extends RuntimeException> oobe,
+            long index, long length) {
+        return outOfBounds(oobe, "checkIndex", index, length);
+    }
+
+    private static RuntimeException outOfBoundsCheckFromToIndex(
+            BiFunction<String, List<Number>, ? extends RuntimeException> oobe,
+            long fromIndex, long toIndex, long length) {
+        return outOfBounds(oobe, "checkFromToIndex", fromIndex, toIndex, length);
+    }
+
+    private static RuntimeException outOfBoundsCheckFromIndexSize(
+            BiFunction<String, List<Number>, ? extends RuntimeException> oobe,
+            long fromIndex, long size, long length) {
+        return outOfBounds(oobe, "checkFromIndexSize", fromIndex, size, length);
+    }
+
+    /**
+     * Returns an out-of-bounds exception formatter from an given exception
+     * factory.  The exception formatter is a function that formats an
+     * out-of-bounds message from its arguments and applies that message to the
+     * given exception factory to produce and relay an exception.
+     *
+     * <p>The exception formatter accepts two arguments: a {@code String}
+     * describing the out-of-bounds range check that failed, referred to as the
+     * <em>check kind</em>; and a {@code List<Number>} containing the
+     * out-of-bound integral values that failed the check.  The list of
+     * out-of-bound values is not modified.
+     *
+     * <p>Three check kinds are supported {@code checkIndex},
+     * {@code checkFromToIndex} and {@code checkFromIndexSize} corresponding
+     * respectively to the specified application of an exception formatter as an
+     * argument to the out-of-bounds range check methods
+     * {@link #checkIndex(int, int, BiFunction) checkIndex},
+     * {@link #checkFromToIndex(int, int, int, BiFunction) checkFromToIndex}, and
+     * {@link #checkFromIndexSize(int, int, int, BiFunction) checkFromIndexSize}.
+     * Thus a supported check kind corresponds to a method name and the
+     * out-of-bound integral values correspond to method argument values, in
+     * order, preceding the exception formatter argument (similar in many
+     * respects to the form of arguments required for a reflective invocation of
+     * such a range check method).
+     *
+     * <p>Formatter arguments conforming to such supported check kinds will
+     * produce specific exception messages describing failed out-of-bounds
+     * checks.  Otherwise, more generic exception messages will be produced in
+     * any of the following cases: the check kind is supported but fewer
+     * or more out-of-bounds values are supplied, the check kind is not
+     * supported, the check kind is {@code null}, or the list of out-of-bound
+     * values is {@code null}.
+     *
+     * @apiNote
+     * This method produces an out-of-bounds exception formatter that can be
+     * passed as an argument to any of the supported out-of-bounds range check
+     * methods declared by {@code Objects}.  For example, a formatter producing
+     * an {@code ArrayIndexOutOfBoundsException} may be produced and stored on a
+     * {@code static final} field as follows:
+     * <pre>{@code
+     * static final
+     * BiFunction<String, List<Number>, ArrayIndexOutOfBoundsException> AIOOBEF =
+     *     outOfBoundsExceptionFormatter(ArrayIndexOutOfBoundsException::new);
+     * }</pre>
+     * The formatter instance {@code AIOOBEF} may be passed as an argument to an
+     * out-of-bounds range check method, such as checking if an {@code index}
+     * is within the bounds of a {@code limit}:
+     * <pre>{@code
+     * checkIndex(index, limit, AIOOBEF);
+     * }</pre>
+     * If the bounds check fails then the range check method will throw an
+     * {@code ArrayIndexOutOfBoundsException} with an appropriate exception
+     * message that is a produced from {@code AIOOBEF} as follows:
+     * <pre>{@code
+     * AIOOBEF.apply("checkIndex", List.of(index, limit));
+     * }</pre>
+     *
+     * @param f the exception factory, that produces an exception from a message
+     *        where the message is produced and formatted by the returned
+     *        exception formatter.  If this factory is stateless and side-effect
+     *        free then so is the returned formatter.
+     *        Exceptions thrown by the factory are relayed to the caller
+     *        of the returned formatter.
+     * @param <X> the type of runtime exception to be returned by the given
+     *        exception factory and relayed by the exception formatter
+     * @return the out-of-bounds exception formatter
+     */
+    public static <X extends RuntimeException>
+    BiFunction<String, List<Number>, X> outOfBoundsExceptionFormatter(Function<String, X> f) {
+        // Use anonymous class to avoid bootstrap issues if this method is
+        // used early in startup
+        return new BiFunction<String, List<Number>, X>() {
+            @Override
+            public X apply(String checkKind, List<Number> args) {
+                return f.apply(outOfBoundsMessage(checkKind, args));
+            }
+        };
+    }
+
+    private static String outOfBoundsMessage(String checkKind, List<? extends Number> args) {
+        if (checkKind == null && args == null) {
+            return String.format("Range check failed");
+        } else if (checkKind == null) {
+            return String.format("Range check failed: %s", args);
+        } else if (args == null) {
+            return String.format("Range check failed: %s", checkKind);
+        }
+
+        int argSize = 0;
+        switch (checkKind) {
+            case "checkIndex":
+                argSize = 2;
+                break;
+            case "checkFromToIndex":
+            case "checkFromIndexSize":
+                argSize = 3;
+                break;
+            default:
+        }
+
+        // Switch to default if fewer or more arguments than required are supplied
+        switch ((args.size() != argSize) ? "" : checkKind) {
+            case "checkIndex":
+                return String.format("Index %s out of bounds for length %s",
+                                     args.get(0), args.get(1));
+            case "checkFromToIndex":
+                return String.format("Range [%s, %s) out of bounds for length %s",
+                                     args.get(0), args.get(1), args.get(2));
+            case "checkFromIndexSize":
+                return String.format("Range [%s, %<s + %s) out of bounds for length %s",
+                                     args.get(0), args.get(1), args.get(2));
+            default:
+                return String.format("Range check failed: %s %s", checkKind, args);
+        }
+    }
+
+    /**
+     * Checks if the {@code index} is within the bounds of the range from
+     * {@code 0} (inclusive) to {@code length} (exclusive).
+     *
+     * <p>The {@code index} is defined to be out of bounds if any of the
+     * following inequalities is true:
+     * <ul>
+     *  <li>{@code index < 0}</li>
+     *  <li>{@code index >= length}</li>
+     *  <li>{@code length < 0}, which is implied from the former inequalities</li>
+     * </ul>
+     *
+     * <p>If the {@code index} is out of bounds, then a runtime exception is
+     * thrown that is the result of applying the following arguments to the
+     * exception formatter: the name of this method, {@code checkIndex};
+     * and an unmodifiable list of integers whose values are, in order, the
+     * out-of-bounds arguments {@code index} and {@code length}.
+     *
+     * @param <X> the type of runtime exception to throw if the arguments are
+     *        out of bounds
+     * @param index the index
+     * @param length the upper-bound (exclusive) of the range
+     * @param oobef the exception formatter that when applied with this
+     *        method name and out-of-bounds arguments returns a runtime
+     *        exception.  If {@code null} or returns {@code null} then, it is as
+     *        if an exception formatter produced from an invocation of
+     *        {@code outOfBoundsExceptionFormatter(IndexOutOfBounds::new)} is used
+     *        instead (though it may be more efficient).
+     *        Exceptions thrown by the formatter are relayed to the caller.
+     * @return {@code index} if it is within bounds of the range
+     * @throws X if the {@code index} is out of bounds and the exception
+     *         formatter is non-{@code null}
+     * @throws IndexOutOfBoundsException if the {@code index} is out of bounds
+     *         and the exception formatter is {@code null}
+     * @since 9
+     *
+     * @implNote
+     * This method is made intrinsic in optimizing compilers to guide them to
+     * perform unsigned comparisons of the index and length when it is known the
+     * length is a non-negative value (such as that of an array length or from
+     * the upper bound of a loop)
+     */
+    @IntrinsicCandidate
+    public static <X extends RuntimeException>
+    int checkIndex(int index, int length,
+                   BiFunction<String, List<Number>, X> oobef) {
+        if (index < 0 || index >= length)
+            throw outOfBoundsCheckIndex(oobef, index, length);
+        return index;
+    }
+
+    /**
+     * Checks if the sub-range from {@code fromIndex} (inclusive) to
+     * {@code toIndex} (exclusive) is within the bounds of range from {@code 0}
+     * (inclusive) to {@code length} (exclusive).
+     *
+     * <p>The sub-range is defined to be out of bounds if any of the following
+     * inequalities is true:
+     * <ul>
+     *  <li>{@code fromIndex < 0}</li>
+     *  <li>{@code fromIndex > toIndex}</li>
+     *  <li>{@code toIndex > length}</li>
+     *  <li>{@code length < 0}, which is implied from the former inequalities</li>
+     * </ul>
+     *
+     * <p>If the sub-range is out of bounds, then a runtime exception is
+     * thrown that is the result of applying the following arguments to the
+     * exception formatter: the name of this method, {@code checkFromToIndex};
+     * and an unmodifiable list of integers whose values are, in order, the
+     * out-of-bounds arguments {@code fromIndex}, {@code toIndex}, and {@code length}.
+     *
+     * @param <X> the type of runtime exception to throw if the arguments are
+     *        out of bounds
+     * @param fromIndex the lower-bound (inclusive) of the sub-range
+     * @param toIndex the upper-bound (exclusive) of the sub-range
+     * @param length the upper-bound (exclusive) the range
+     * @param oobef the exception formatter that when applied with this
+     *        method name and out-of-bounds arguments returns a runtime
+     *        exception.  If {@code null} or returns {@code null} then, it is as
+     *        if an exception formatter produced from an invocation of
+     *        {@code outOfBoundsExceptionFormatter(IndexOutOfBounds::new)} is used
+     *        instead (though it may be more efficient).
+     *        Exceptions thrown by the formatter are relayed to the caller.
+     * @return {@code fromIndex} if the sub-range within bounds of the range
+     * @throws X if the sub-range is out of bounds and the exception factory
+     *         function is non-{@code null}
+     * @throws IndexOutOfBoundsException if the sub-range is out of bounds and
+     *         the exception factory function is {@code null}
+     * @since 9
+     */
+    public static <X extends RuntimeException>
+    int checkFromToIndex(int fromIndex, int toIndex, int length,
+                         BiFunction<String, List<Number>, X> oobef) {
+        if (fromIndex < 0 || fromIndex > toIndex || toIndex > length)
+            throw outOfBoundsCheckFromToIndex(oobef, fromIndex, toIndex, length);
+        return fromIndex;
+    }
+
+    /**
+     * Checks if the sub-range from {@code fromIndex} (inclusive) to
+     * {@code fromIndex + size} (exclusive) is within the bounds of range from
+     * {@code 0} (inclusive) to {@code length} (exclusive).
+     *
+     * <p>The sub-range is defined to be out of bounds if any of the following
+     * inequalities is true:
+     * <ul>
+     *  <li>{@code fromIndex < 0}</li>
+     *  <li>{@code size < 0}</li>
+     *  <li>{@code fromIndex + size > length}, taking into account integer overflow</li>
+     *  <li>{@code length < 0}, which is implied from the former inequalities</li>
+     * </ul>
+     *
+     * <p>If the sub-range is out of bounds, then a runtime exception is
+     * thrown that is the result of applying the following arguments to the
+     * exception formatter: the name of this method, {@code checkFromIndexSize};
+     * and an unmodifiable list of integers whose values are, in order, the
+     * out-of-bounds arguments {@code fromIndex}, {@code size}, and
+     * {@code length}.
+     *
+     * @param <X> the type of runtime exception to throw if the arguments are
+     *        out of bounds
+     * @param fromIndex the lower-bound (inclusive) of the sub-interval
+     * @param size the size of the sub-range
+     * @param length the upper-bound (exclusive) of the range
+     * @param oobef the exception formatter that when applied with this
+     *        method name and out-of-bounds arguments returns a runtime
+     *        exception.  If {@code null} or returns {@code null} then, it is as
+     *        if an exception formatter produced from an invocation of
+     *        {@code outOfBoundsExceptionFormatter(IndexOutOfBounds::new)} is used
+     *        instead (though it may be more efficient).
+     *        Exceptions thrown by the formatter are relayed to the caller.
+     * @return {@code fromIndex} if the sub-range within bounds of the range
+     * @throws X if the sub-range is out of bounds and the exception factory
+     *         function is non-{@code null}
+     * @throws IndexOutOfBoundsException if the sub-range is out of bounds and
+     *         the exception factory function is {@code null}
+     * @since 9
+     */
+    public static <X extends RuntimeException>
+    int checkFromIndexSize(int fromIndex, int size, int length,
+                           BiFunction<String, List<Number>, X> oobef) {
+        if ((length | fromIndex | size) < 0 || size > length - fromIndex)
+            throw outOfBoundsCheckFromIndexSize(oobef, fromIndex, size, length);
+        return fromIndex;
+    }
+
+    /**
+     * Checks if the {@code index} is within the bounds of the range from
+     * {@code 0} (inclusive) to {@code length} (exclusive).
+     *
+     * <p>The {@code index} is defined to be out of bounds if any of the
+     * following inequalities is true:
+     * <ul>
+     *  <li>{@code index < 0}</li>
+     *  <li>{@code index >= length}</li>
+     *  <li>{@code length < 0}, which is implied from the former inequalities</li>
+     * </ul>
+     *
+     * <p>If the {@code index} is out of bounds, then a runtime exception is
+     * thrown that is the result of applying the following arguments to the
+     * exception formatter: the name of this method, {@code checkIndex};
+     * and an unmodifiable list of longs whose values are, in order, the
+     * out-of-bounds arguments {@code index} and {@code length}.
+     *
+     * @param <X> the type of runtime exception to throw if the arguments are
+     *        out of bounds
+     * @param index the index
+     * @param length the upper-bound (exclusive) of the range
+     * @param oobef the exception formatter that when applied with this
+     *        method name and out-of-bounds arguments returns a runtime
+     *        exception.  If {@code null} or returns {@code null} then, it is as
+     *        if an exception formatter produced from an invocation of
+     *        {@code outOfBoundsExceptionFormatter(IndexOutOfBounds::new)} is used
+     *        instead (though it may be more efficient).
+     *        Exceptions thrown by the formatter are relayed to the caller.
+     * @return {@code index} if it is within bounds of the range
+     * @throws X if the {@code index} is out of bounds and the exception
+     *         formatter is non-{@code null}
+     * @throws IndexOutOfBoundsException if the {@code index} is out of bounds
+     *         and the exception formatter is {@code null}
+     * @since 16
+     *
+     * @implNote
+     * This method is made intrinsic in optimizing compilers to guide them to
+     * perform unsigned comparisons of the index and length when it is known the
+     * length is a non-negative value (such as that of an array length or from
+     * the upper bound of a loop)
+     */
+    @IntrinsicCandidate
+    public static <X extends RuntimeException>
+    long checkIndex(long index, long length,
+                    BiFunction<String, List<Number>, X> oobef) {
+        if (index < 0 || index >= length)
+            throw outOfBoundsCheckIndex(oobef, index, length);
+        return index;
+    }
+
+    /**
+     * Checks if the sub-range from {@code fromIndex} (inclusive) to
+     * {@code toIndex} (exclusive) is within the bounds of range from {@code 0}
+     * (inclusive) to {@code length} (exclusive).
+     *
+     * <p>The sub-range is defined to be out of bounds if any of the following
+     * inequalities is true:
+     * <ul>
+     *  <li>{@code fromIndex < 0}</li>
+     *  <li>{@code fromIndex > toIndex}</li>
+     *  <li>{@code toIndex > length}</li>
+     *  <li>{@code length < 0}, which is implied from the former inequalities</li>
+     * </ul>
+     *
+     * <p>If the sub-range is out of bounds, then a runtime exception is
+     * thrown that is the result of applying the following arguments to the
+     * exception formatter: the name of this method, {@code checkFromToIndex};
+     * and an unmodifiable list of longs whose values are, in order, the
+     * out-of-bounds arguments {@code fromIndex}, {@code toIndex}, and {@code length}.
+     *
+     * @param <X> the type of runtime exception to throw if the arguments are
+     *        out of bounds
+     * @param fromIndex the lower-bound (inclusive) of the sub-range
+     * @param toIndex the upper-bound (exclusive) of the sub-range
+     * @param length the upper-bound (exclusive) the range
+     * @param oobef the exception formatter that when applied with this
+     *        method name and out-of-bounds arguments returns a runtime
+     *        exception.  If {@code null} or returns {@code null} then, it is as
+     *        if an exception formatter produced from an invocation of
+     *        {@code outOfBoundsExceptionFormatter(IndexOutOfBounds::new)} is used
+     *        instead (though it may be more efficient).
+     *        Exceptions thrown by the formatter are relayed to the caller.
+     * @return {@code fromIndex} if the sub-range within bounds of the range
+     * @throws X if the sub-range is out of bounds and the exception factory
+     *         function is non-{@code null}
+     * @throws IndexOutOfBoundsException if the sub-range is out of bounds and
+     *         the exception factory function is {@code null}
+     * @since 16
+     */
+    public static <X extends RuntimeException>
+    long checkFromToIndex(long fromIndex, long toIndex, long length,
+                          BiFunction<String, List<Number>, X> oobef) {
+        if (fromIndex < 0 || fromIndex > toIndex || toIndex > length)
+            throw outOfBoundsCheckFromToIndex(oobef, fromIndex, toIndex, length);
+        return fromIndex;
+    }
+
+    /**
+     * Checks if the sub-range from {@code fromIndex} (inclusive) to
+     * {@code fromIndex + size} (exclusive) is within the bounds of range from
+     * {@code 0} (inclusive) to {@code length} (exclusive).
+     *
+     * <p>The sub-range is defined to be out of bounds if any of the following
+     * inequalities is true:
+     * <ul>
+     *  <li>{@code fromIndex < 0}</li>
+     *  <li>{@code size < 0}</li>
+     *  <li>{@code fromIndex + size > length}, taking into account integer overflow</li>
+     *  <li>{@code length < 0}, which is implied from the former inequalities</li>
+     * </ul>
+     *
+     * <p>If the sub-range is out of bounds, then a runtime exception is
+     * thrown that is the result of applying the following arguments to the
+     * exception formatter: the name of this method, {@code checkFromIndexSize};
+     * and an unmodifiable list of longs whose values are, in order, the
+     * out-of-bounds arguments {@code fromIndex}, {@code size}, and
+     * {@code length}.
+     *
+     * @param <X> the type of runtime exception to throw if the arguments are
+     *        out of bounds
+     * @param fromIndex the lower-bound (inclusive) of the sub-interval
+     * @param size the size of the sub-range
+     * @param length the upper-bound (exclusive) of the range
+     * @param oobef the exception formatter that when applied with this
+     *        method name and out-of-bounds arguments returns a runtime
+     *        exception.  If {@code null} or returns {@code null} then, it is as
+     *        if an exception formatter produced from an invocation of
+     *        {@code outOfBoundsExceptionFormatter(IndexOutOfBounds::new)} is used
+     *        instead (though it may be more efficient).
+     *        Exceptions thrown by the formatter are relayed to the caller.
+     * @return {@code fromIndex} if the sub-range within bounds of the range
+     * @throws X if the sub-range is out of bounds and the exception factory
+     *         function is non-{@code null}
+     * @throws IndexOutOfBoundsException if the sub-range is out of bounds and
+     *         the exception factory function is {@code null}
+     * @since 16
+     */
+    public static <X extends RuntimeException>
+    long checkFromIndexSize(long fromIndex, long size, long length,
+                            BiFunction<String, List<Number>, X> oobef) {
+        if ((length | fromIndex | size) < 0 || size > length - fromIndex)
+            throw outOfBoundsCheckFromIndexSize(oobef, fromIndex, size, length);
+        return fromIndex;
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/util/ReferenceKey.class b/tests/test_data/std/jdk/internal/util/ReferenceKey.class
new file mode 100644
index 0000000000000000000000000000000000000000..2545e7e2342e679b4334e216067e8f65a6dd9381
GIT binary patch
literal 420
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zOtZT)JNx|ndj9}$gJT~(!bzE}qe5FYT2+y=MHM~riVf?O7yRa9hcGGCtBNY6^XPtA
za%u_voW;(A@a}K!k}!&kTr2Ag69z$;B*J-4yM{BV48kWuaFtwiORu{WVI0@aq<mXc
z(r(&b?tC+wFneJ0QdrAb?3QVznuZ%66T(^dw%D3l=j|pwjtHk+<uj}Gwr>8fF0NO$
qt@8+Sq<k3Y$?pd61p6C=q2Lk568C?ZUF`j2_HiJ7DEuL&n0*7G7I0kv

literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/util/ReferenceKey.java b/tests/test_data/std/jdk/internal/util/ReferenceKey.java
new file mode 100644
index 00000000..a193794f
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/util/ReferenceKey.java
@@ -0,0 +1,51 @@
+/*
+ * Copyright (c) 2023, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package jdk.internal.util;
+
+import java.lang.ref.Reference;
+
+/**
+ * View/wrapper of keys used by the backing {@link ReferencedKeyMap}.
+ * There are two style of keys; one for entries in the backing map and
+ * one for queries to the backing map. This second style avoids the
+ * overhead of a {@link Reference} object.
+ *
+ * @param <T> key type
+ *
+ * @since 21
+ */
+public sealed interface ReferenceKey<T> permits StrongReferenceKey, WeakReferenceKey, SoftReferenceKey {
+    /**
+     * {@return the value of the unwrapped key}
+     */
+    T get();
+
+    /**
+     * Cleanup unused key.
+     */
+    void unused();
+
+}
diff --git a/tests/test_data/std/jdk/internal/util/ReferencedKeyMap$1.class b/tests/test_data/std/jdk/internal/util/ReferencedKeyMap$1.class
new file mode 100644
index 0000000000000000000000000000000000000000..bb541a85556b73fcc14d981b3a5c503371fb2ad1
GIT binary patch
literal 965
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/util/ReferencedKeyMap.class b/tests/test_data/std/jdk/internal/util/ReferencedKeyMap.class
new file mode 100644
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HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/util/ReferencedKeyMap.java b/tests/test_data/std/jdk/internal/util/ReferencedKeyMap.java
new file mode 100644
index 00000000..9c364cd7
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/util/ReferencedKeyMap.java
@@ -0,0 +1,483 @@
+/*
+ * Copyright (c) 2023, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package jdk.internal.util;
+
+import java.lang.ref.Reference;
+import java.lang.ref.ReferenceQueue;
+import java.lang.ref.SoftReference;
+import java.lang.ref.WeakReference;
+import java.util.AbstractMap;
+import java.util.Collection;
+import java.util.HashMap;
+import java.util.Objects;
+import java.util.Map;
+import java.util.Set;
+import java.util.concurrent.ConcurrentHashMap;
+import java.util.function.Supplier;
+import java.util.function.UnaryOperator;
+import java.util.stream.Collectors;
+import java.util.stream.Stream;
+
+import jdk.internal.access.SharedSecrets;
+
+/**
+ * This class provides management of {@link Map maps} where it is desirable to
+ * remove entries automatically when the key is garbage collected. This is
+ * accomplished by using a backing map where the keys are either a
+ * {@link WeakReference} or a {@link SoftReference}.
+ * <p>
+ * To create a {@link ReferencedKeyMap} the user must provide a {@link Supplier}
+ * of the backing map and whether {@link WeakReference} or
+ * {@link SoftReference} is to be used.
+ *
+ * {@snippet :
+ * // Use HashMap and WeakReference
+ * Map<Long, String> map = ReferencedKeyMap.create(false, HashMap::new);
+ * map.put(10_000_000L, "a");
+ * map.put(10_000_001L, "b");
+ * map.put(10_000_002L, "c");
+ * map.put(10_000_003L, "d");
+ * map.put(10_000_004L, "e");
+ *
+ * // Use ConcurrentHashMap and SoftReference
+ * map = ReferencedKeyMap.create(true, ConcurrentHashMap::new);
+ * map.put(20_000_000L, "v");
+ * map.put(20_000_001L, "w");
+ * map.put(20_000_002L, "x");
+ * map.put(20_000_003L, "y");
+ * map.put(20_000_004L, "z");
+ * }
+ *
+ * @implNote Care must be given that the backing map does replacement by
+ * replacing the value in the map entry instead of deleting the old entry and
+ * adding a new entry, otherwise replaced entries may end up with a strongly
+ * referenced key. {@link HashMap} and {@link ConcurrentHashMap} are known
+ * to be safe.
+ *
+ * @param <K> the type of keys maintained by this map
+ * @param <V> the type of mapped values
+ *
+ * @since 21
+ */
+public final class ReferencedKeyMap<K, V> implements Map<K, V> {
+    /**
+     * true if {@link SoftReference} keys are to be used,
+     * {@link WeakReference} otherwise.
+     */
+    private final boolean isSoft;
+
+    /**
+     * Backing {@link Map}.
+     */
+    private final Map<ReferenceKey<K>, V> map;
+
+    /**
+     * {@link ReferenceQueue} for cleaning up entries.
+     */
+    private final ReferenceQueue<K> stale;
+
+    /**
+     * @return a supplier to create a {@code ConcurrentHashMap} appropriate for use in the
+     *         create methods.
+     * @param <K> the type of keys maintained by the new map
+     * @param <V> the type of mapped values
+     */
+    public static <K, V> Supplier<Map<ReferenceKey<K>, V>> concurrentHashMapSupplier() {
+        return new Supplier<>() {
+            @Override
+            public Map<ReferenceKey<K>, V> get() {
+                return new ConcurrentHashMap<>();
+            }
+        };
+    }
+
+    /**
+     * Private constructor.
+     *
+     * @param isSoft          true if {@link SoftReference} keys are to
+     *                        be used, {@link WeakReference} otherwise.
+     * @param map             backing map
+     * @param stale           {@link ReferenceQueue} for cleaning up entries
+     */
+    private ReferencedKeyMap(boolean isSoft, Map<ReferenceKey<K>, V> map, ReferenceQueue<K> stale) {
+        this.isSoft = isSoft;
+        this.map = map;
+        this.stale = stale;
+    }
+
+    /**
+     * Create a new {@link ReferencedKeyMap} map.
+     *
+     * @param isSoft          true if {@link SoftReference} keys are to
+     *                        be used, {@link WeakReference} otherwise.
+     * @param supplier        {@link Supplier} of the backing map
+     *
+     * @return a new map with {@link Reference} keys
+     *
+     * @param <K> the type of keys maintained by the new map
+     * @param <V> the type of mapped values
+     */
+    public static <K, V> ReferencedKeyMap<K, V>
+    create(boolean isSoft, Supplier<Map<ReferenceKey<K>, V>> supplier) {
+        return create(isSoft, false, supplier);
+    }
+
+    /**
+     * Create a new {@link ReferencedKeyMap} map.
+     *
+     * @param isSoft          true if {@link SoftReference} keys are to
+     *                        be used, {@link WeakReference} otherwise.
+     * @param useNativeQueue  true if uses NativeReferenceQueue
+     *                        otherwise use {@link ReferenceQueue}.
+     * @param supplier        {@link Supplier} of the backing map
+     *
+     * @return a new map with {@link Reference} keys
+     *
+     * @param <K> the type of keys maintained by the new map
+     * @param <V> the type of mapped values
+     */
+    public static <K, V> ReferencedKeyMap<K, V>
+    create(boolean isSoft, boolean useNativeQueue, Supplier<Map<ReferenceKey<K>, V>> supplier) {
+        return new ReferencedKeyMap<K, V>(isSoft, supplier.get(),
+                useNativeQueue ? SharedSecrets.getJavaLangRefAccess().newNativeReferenceQueue()
+                               : new ReferenceQueue<>()
+                );
+    }
+
+    /**
+     * {@return a key suitable for a map entry}
+     *
+     * @param key unwrapped key
+     */
+    @SuppressWarnings("unchecked")
+    private ReferenceKey<K> entryKey(Object key) {
+        if (isSoft) {
+            return new SoftReferenceKey<>((K)key, stale);
+        } else {
+            return new WeakReferenceKey<>((K)key, stale);
+        }
+    }
+
+    /**
+     * {@return a key suitable for lookup}
+     *
+     * @param key unwrapped key
+     */
+    @SuppressWarnings("unchecked")
+    private ReferenceKey<K> lookupKey(Object key) {
+        return new StrongReferenceKey<>((K)key);
+    }
+
+    @Override
+    public int size() {
+        removeStaleReferences();
+        return map.size();
+    }
+
+    @Override
+    public boolean isEmpty() {
+        removeStaleReferences();
+        return map.isEmpty();
+    }
+
+    @Override
+    public boolean containsKey(Object key) {
+        Objects.requireNonNull(key, "key must not be null");
+        removeStaleReferences();
+        return map.containsKey(lookupKey(key));
+    }
+
+    @Override
+    public boolean containsValue(Object value) {
+        Objects.requireNonNull(value, "value must not be null");
+        removeStaleReferences();
+        return map.containsValue(value);
+    }
+
+    @Override
+    public V get(Object key) {
+        Objects.requireNonNull(key, "key must not be null");
+        removeStaleReferences();
+        return map.get(lookupKey(key));
+    }
+
+    @Override
+    public V put(K key, V newValue) {
+        Objects.requireNonNull(key, "key must not be null");
+        Objects.requireNonNull(newValue, "value must not be null");
+        removeStaleReferences();
+        ReferenceKey<K> entryKey = entryKey(key);
+        // If {@code put} returns non-null then was actually a {@code replace}
+        // and older key was used. In that case the new key was not used and the
+        // reference marked stale.
+        V oldValue = map.put(entryKey, newValue);
+        if (oldValue != null) {
+            entryKey.unused();
+        }
+        return oldValue;
+    }
+
+    @Override
+    public V remove(Object key) {
+        // Rely on gc to clean up old key.
+        return map.remove(lookupKey(key));
+    }
+
+    @Override
+    public void putAll(Map<? extends K, ? extends V> m) {
+        removeStaleReferences();
+        for (Entry<? extends K, ? extends V> entry : m.entrySet()) {
+            K key = entry.getKey();
+            V value = entry.getValue();
+            put(key, value);
+        }
+    }
+
+    @Override
+    public void clear() {
+        removeStaleReferences();
+        // Rely on gc to clean up old keys.
+        map.clear();
+    }
+
+    /**
+     * Common routine for collecting the current set of keys.
+     *
+     * @return {@link Stream} of valid keys (unwrapped)
+     */
+    private Stream<K> filterKeySet() {
+        return map.keySet()
+                .stream()
+                .map(ReferenceKey::get)
+                .filter(Objects::nonNull);
+    }
+
+    @Override
+    public Set<K> keySet() {
+        removeStaleReferences();
+        return filterKeySet().collect(Collectors.toSet());
+    }
+
+    @Override
+    public Collection<V> values() {
+        removeStaleReferences();
+        return map.values();
+    }
+
+    @Override
+    public Set<Entry<K, V>> entrySet() {
+        removeStaleReferences();
+        return filterKeySet()
+                .map(k -> new AbstractMap.SimpleEntry<>(k, get(k)))
+                .collect(Collectors.toSet());
+    }
+
+    @Override
+    public V putIfAbsent(K key, V newValue) {
+        removeStaleReferences();
+        ReferenceKey<K> entryKey = entryKey(key);
+        // If {@code putIfAbsent} returns non-null then was actually a
+        // {@code replace}  and older key was used. In that case the new key was
+        // not used and the reference marked stale.
+        V oldValue = map.putIfAbsent(entryKey, newValue);
+        if (oldValue != null) {
+            entryKey.unused();
+        }
+        return oldValue;
+    }
+
+    @Override
+    public boolean remove(Object key, Object value) {
+        // Rely on gc to clean up old key.
+        return map.remove(lookupKey(key), value);
+    }
+
+    @Override
+    public boolean replace(K key, V oldValue, V newValue) {
+        removeStaleReferences();
+        // If replace is successful then the older key will be used and the
+        // lookup key will suffice.
+        return map.replace(lookupKey(key), oldValue, newValue);
+    }
+
+    @Override
+    public V replace(K key, V value) {
+        removeStaleReferences();
+        // If replace is successful then the older key will be used and the
+        // lookup key will suffice.
+        return map.replace(lookupKey(key), value);
+    }
+
+    @Override
+    public String toString() {
+        removeStaleReferences();
+        return filterKeySet()
+                .map(k -> k + "=" + get(k))
+                .collect(Collectors.joining(", ", "{", "}"));
+    }
+
+    /**
+     * Removes enqueued weak references from map.
+     */
+    public void removeStaleReferences() {
+        while (true) {
+            Object key = stale.poll();
+            if (key == null) {
+                break;
+            }
+            map.remove(key);
+        }
+    }
+
+    /**
+     * Puts an entry where the key and the value are the same. Used for
+     * interning values in a set.
+     *
+     * @implNote Requires a {@link ReferencedKeyMap} whose {@code V} type
+     * is a {@code ReferenceKey<K>}. Otherwise, a {@link ClassCastException} will
+     * be thrown.
+     *
+     * @param setMap    {@link ReferencedKeyMap} where interning takes place
+     * @param key       key to add
+     *
+     * @param <T> type of key
+     *
+     * @return the old key instance if found otherwise the new key instance
+     *
+     * @throws ClassCastException if {@code V} is not {@code EntryKey<T>}
+     */
+    static <T> T intern(ReferencedKeyMap<T, ReferenceKey<T>> setMap, T key) {
+        T value = existingKey(setMap, key);
+        if (value != null) {
+            return value;
+        }
+        return internKey(setMap, key);
+    }
+
+    /**
+     * Puts an entry where the key and the value are the same. Used for
+     * interning values in a set.
+     *
+     * @implNote Requires a {@link ReferencedKeyMap} whose {@code V} type
+     * is a {@code ReferenceKey<K>}. Otherwise, a {@link ClassCastException} will
+     * be thrown.
+     *
+     * @param setMap    {@link ReferencedKeyMap} where interning takes place
+     * @param key       key to add
+     * @param interner  operation to apply to key before adding to map
+     *
+     * @param <T> type of key
+     *
+     * @return the old key instance if found otherwise the new key instance
+     *
+     * @throws ClassCastException if {@code V} is not {@code EntryKey<T>}
+     *
+     * @implNote This version of intern should not be called during phase1
+     * using a lambda. Use an UnaryOperator instance instead.
+     */
+    static <T> T intern(ReferencedKeyMap<T, ReferenceKey<T>> setMap, T key, UnaryOperator<T> interner) {
+        T value = existingKey(setMap, key);
+        if (value != null) {
+            return value;
+        }
+        key = interner.apply(key);
+        return internKey(setMap, key);
+    }
+
+    /**
+     * Check if the key already exists in the map.
+     *
+     * @param setMap    {@link ReferencedKeyMap} where interning takes place
+     * @param key       key to test
+     *
+     * @param <T> type of key
+     *
+     * @return key if found otherwise null
+     */
+    private static <T> T existingKey(ReferencedKeyMap<T, ReferenceKey<T>> setMap, T key) {
+        setMap.removeStaleReferences();
+        ReferenceKey<T> entryKey = setMap.get(setMap.lookupKey(key));
+        return entryKey != null ? entryKey.get() : null;
+    }
+
+    /**
+     * Attempt to add key to map.
+     *
+     * @param setMap    {@link ReferencedKeyMap} where interning takes place
+     * @param key       key to add
+     *
+     * @param <T> type of key
+     *
+     * @return the old key instance if found otherwise the new key instance
+     */
+    private static <T> T internKey(ReferencedKeyMap<T, ReferenceKey<T>> setMap, T key) {
+        ReferenceKey<T> entryKey = setMap.entryKey(key);
+        T interned;
+        do {
+            setMap.removeStaleReferences();
+            ReferenceKey<T> existing = setMap.map.putIfAbsent(entryKey, entryKey);
+            if (existing == null) {
+                return key;
+            } else {
+                // If {@code putIfAbsent} returns non-null then was actually a
+                // {@code replace} and older key was used. In that case the new
+                // key was not used and the reference marked stale.
+                interned = existing.get();
+                if (interned != null) {
+                    entryKey.unused();
+                }
+            }
+        } while (interned == null);
+        return interned;
+    }
+
+
+    /**
+     * Attempt to add key to map if absent.
+     *
+     * @param setMap    {@link ReferencedKeyMap} where interning takes place
+     * @param key       key to add
+     *
+     * @param <T> type of key
+     *
+     * @return true if the key was added
+     */
+    static <T> boolean internAddKey(ReferencedKeyMap<T, ReferenceKey<T>> setMap, T key) {
+        ReferenceKey<T> entryKey = setMap.entryKey(key);
+        setMap.removeStaleReferences();
+        ReferenceKey<T> existing = setMap.map.putIfAbsent(entryKey, entryKey);
+        if (existing == null) {
+            return true;
+        } else {
+            // If {@code putIfAbsent} returns non-null then was actually a
+            // {@code replace} and older key was used. In that case the new
+            // key was not used and the reference marked stale.
+            entryKey.unused();
+            return false;
+        }
+     }
+
+}
diff --git a/tests/test_data/std/jdk/internal/util/ReferencedKeySet.class b/tests/test_data/std/jdk/internal/util/ReferencedKeySet.class
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diff --git a/tests/test_data/std/jdk/internal/util/ReferencedKeySet.java b/tests/test_data/std/jdk/internal/util/ReferencedKeySet.java
new file mode 100644
index 00000000..73ad6f32
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/util/ReferencedKeySet.java
@@ -0,0 +1,214 @@
+/*
+ * Copyright (c) 2023, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package jdk.internal.util;
+
+import java.lang.ref.Reference;
+import java.lang.ref.ReferenceQueue;
+import java.lang.ref.SoftReference;
+import java.lang.ref.WeakReference;
+import java.util.*;
+import java.util.concurrent.ConcurrentHashMap;
+import java.util.function.Supplier;
+import java.util.function.UnaryOperator;
+
+/**
+ * This class provides management of {@link Set set} where it is desirable to
+ * remove elements automatically when the element is garbage collected. This is
+ * accomplished by using a backing map where the keys and values are either a
+ * {@link WeakReference} or a {@link SoftReference}.
+ * <p>
+ * To create a {@link ReferencedKeySet} the user must provide a {@link Supplier}
+ * of the backing map and whether {@link WeakReference} or
+ * {@link SoftReference} is to be used.
+ * {@snippet :
+ * Set<Long> set;
+ *
+ * set = ReferencedKeySet.create(false, HashMap::new);
+ * set.add(30_000_000L);
+ * set.add(30_000_001L);
+ * set.add(30_000_002L);
+ * set.add(30_000_003L);
+ * set.add(30_000_004L);
+ *
+ * set = ReferencedKeySet.create(true, ConcurrentHashMap::new);
+ * set.add(40_000_000L);
+ * set.add(40_000_001L);
+ * set.add(40_000_002L);
+ * set.add(40_000_003L);
+ * set.add(40_000_004L);
+ * }
+ *
+ * @implNote Care must be given that the backing map does replacement by
+ * replacing the value in the map entry instead of deleting the old entry and
+ * adding a new entry, otherwise replaced entries may end up with a strongly
+ * referenced key. {@link HashMap} and {@link ConcurrentHashMap} are known
+ * to be safe.
+ *
+ * @param <T> the type of elements maintained by this set
+ */
+public final class ReferencedKeySet<T> extends AbstractSet<T> {
+    /**
+     * Backing {@link ReferencedKeySet} map.
+     */
+    final ReferencedKeyMap<T, ReferenceKey<T>> map;
+
+    /**
+     * @return a supplier to create a {@code ConcurrentHashMap} appropriate for use in the
+     *         create methods.
+     * @param <E> the type of elements maintained by this set
+     */
+    public static <E> Supplier<Map<ReferenceKey<E>, ReferenceKey<E>>> concurrentHashMapSupplier() {
+        return ReferencedKeyMap.concurrentHashMapSupplier();
+    }
+
+    /**
+     * Private constructor.
+     *
+     * @param map     backing map
+     */
+    private ReferencedKeySet(ReferencedKeyMap<T, ReferenceKey<T>> map) {
+        this.map = map;
+    }
+
+    /**
+     * Create a new {@link ReferencedKeySet} elements.
+     *
+     * @param isSoft          true if {@link SoftReference} elements are to
+     *                        be used, {@link WeakReference} otherwise.
+     * @param supplier        {@link Supplier} of the backing map
+     *
+     * @return a new set with {@link Reference} elements
+     *
+     * @param <E> the type of elements maintained by this set
+     */
+    public static <E> ReferencedKeySet<E>
+    create(boolean isSoft, Supplier<Map<ReferenceKey<E>, ReferenceKey<E>>> supplier) {
+        return create(isSoft, false, supplier);
+    }
+
+    /**
+     * Create a new {@link ReferencedKeySet} elements.
+     *
+     * @param isSoft          true if {@link SoftReference} elements are to
+     *                        be used, {@link WeakReference} otherwise.
+     * @param useNativeQueue  true if uses NativeReferenceQueue
+     *                        otherwise use {@link ReferenceQueue}.
+     * @param supplier        {@link Supplier} of the backing map
+     *
+     * @return a new set with {@link Reference} elements
+     *
+     * @param <E> the type of elements maintained by this set
+     */
+    public static <E> ReferencedKeySet<E>
+    create(boolean isSoft, boolean useNativeQueue, Supplier<Map<ReferenceKey<E>, ReferenceKey<E>>> supplier) {
+         return new ReferencedKeySet<>(ReferencedKeyMap.create(isSoft, useNativeQueue, supplier));
+    }
+
+    /**
+     * Removes enqueued weak references from set.
+     */
+    public void removeStaleReferences() {
+        map.removeStaleReferences();
+    }
+
+    @Override
+    public Iterator<T> iterator() {
+        return map.keySet().iterator();
+    }
+
+    @Override
+    public int size() {
+        return map.size();
+    }
+
+    @Override
+    public boolean isEmpty() {
+        return map.isEmpty();
+    }
+
+    @Override
+    @SuppressWarnings("unchecked")
+    public boolean contains(Object o) {
+        return map.containsKey((T)o);
+    }
+
+    @Override
+    public boolean add(T e) {
+        return ReferencedKeyMap.internAddKey(map, e);
+    }
+
+    @Override
+    public boolean remove(Object o) {
+        return map.remove(o) != null;
+    }
+
+    @Override
+    public void clear() {
+        map.clear();
+    }
+
+    /**
+     * Gets an existing element from the set, returning null if not present or
+     * the old element if previously added.
+     *
+     * @param e  element to get
+     *
+     * @return the old element if present, otherwise, null
+     */
+    public T get(T e) {
+        ReferenceKey<T> key = map.get(e);
+
+        return key == null ? null : key.get();
+    }
+
+    /**
+     * Intern an element to the set, returning the element if newly added or the
+     * old element if previously added.
+     *
+     * @param e  element to add
+     *
+     * @return the old element if present, otherwise, the new element
+     */
+    public T intern(T e) {
+        return ReferencedKeyMap.intern(map, e);
+    }
+
+    /**
+     * Intern an element to the set, returning the element if newly added or the
+     * old element if previously added.
+     *
+     * @param e         element to add
+     * @param interner  operation to apply to key before adding to set
+     *
+     * @return the old element if present, otherwise, the new element
+     *
+     * @implNote This version of intern should not be called during phase1
+     * using a lambda. Use an UnaryOperator instance instead.
+     */
+    public T intern(T e, UnaryOperator<T> interner) {
+        return ReferencedKeyMap.intern(map, e, interner);
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/util/SoftReferenceKey.class b/tests/test_data/std/jdk/internal/util/SoftReferenceKey.class
new file mode 100644
index 0000000000000000000000000000000000000000..bd6d99b176bb70d9a39b83c4bf24dda0e11beb48
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diff --git a/tests/test_data/std/jdk/internal/util/SoftReferenceKey.java b/tests/test_data/std/jdk/internal/util/SoftReferenceKey.java
new file mode 100644
index 00000000..f7e94e79
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/util/SoftReferenceKey.java
@@ -0,0 +1,91 @@
+/*
+ * Copyright (c) 2023, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package jdk.internal.util;
+
+import java.lang.ref.ReferenceQueue;
+import java.lang.ref.SoftReference;
+import java.util.Objects;
+
+/**
+ * {@link SoftReference} wrapper key for entries in the backing map.
+ *
+ * @param <T> key type
+ *
+ * @since 21
+ */
+final class SoftReferenceKey<T> extends SoftReference<T> implements ReferenceKey<T> {
+    /**
+     * Saved hashcode of the key. Used when {@link SoftReference} is
+     * null.
+     */
+    private final int hashcode;
+
+    /**
+     * Package-Protected constructor.
+     *
+     * @param key   unwrapped key value
+     * @param queue reference queue
+     */
+    SoftReferenceKey(T key, ReferenceQueue<T> queue) {
+        super(key, queue);
+        this.hashcode = Objects.hashCode(key);
+    }
+
+    /**
+     * Cleanup unused key. No need to enqueue since the key did not make it
+     * into the map.
+     */
+    @Override
+    public void unused() {
+        clear();
+    }
+
+    @Override
+    public boolean equals(Object obj) {
+        // Necessary when removing a null reference
+        if (obj == this) {
+            return true;
+        }
+        // Necessary when comparing an unwrapped key
+        if (obj instanceof ReferenceKey<?> key) {
+            obj = key.get();
+        }
+        // Note: refersTo is insufficient since keys require equivalence.
+        // refersTo would also require a cast to type T.
+        return Objects.equals(get(), obj);
+    }
+
+    @Override
+    public int hashCode() {
+        // Use saved hashcode
+        return hashcode;
+    }
+
+    @Override
+    public String toString() {
+        return this.getClass().getCanonicalName() + "#" + System.identityHashCode(this);
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/util/StaticProperty.class b/tests/test_data/std/jdk/internal/util/StaticProperty.class
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diff --git a/tests/test_data/std/jdk/internal/util/StaticProperty.java b/tests/test_data/std/jdk/internal/util/StaticProperty.java
new file mode 100644
index 00000000..da06bf07
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/util/StaticProperty.java
@@ -0,0 +1,311 @@
+/*
+ * Copyright (c) 2018, 2023, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package jdk.internal.util;
+
+import java.util.Properties;
+
+/**
+ * System Property access for internal use only.
+ * Read-only access to System property values initialized during Phase 1
+ * are cached.  Setting, clearing, or modifying the value using
+ * {@link System#setProperty} or {@link System#getProperties()} is ignored.
+ * <strong>{@link SecurityManager#checkPropertyAccess} is NOT checked
+ * in these access methods. The caller of these methods should take care to ensure
+ * that the returned property is not made accessible to untrusted code.</strong>
+ */
+public final class StaticProperty {
+
+    // The class static initialization is triggered to initialize these final
+    // fields during init Phase 1 and before a security manager is set.
+    private static final String JAVA_HOME;
+    private static final String USER_HOME;
+    private static final String USER_DIR;
+    private static final String USER_NAME;
+    private static final String JAVA_LIBRARY_PATH;
+    private static final String SUN_BOOT_LIBRARY_PATH;
+    private static final String JDK_SERIAL_FILTER;
+    private static final String JDK_SERIAL_FILTER_FACTORY;
+    private static final String JAVA_IO_TMPDIR;
+    private static final String NATIVE_ENCODING;
+    private static final String FILE_ENCODING;
+    private static final String JAVA_PROPERTIES_DATE;
+    private static final String SUN_JNU_ENCODING;
+    private static final String JAVA_LOCALE_USE_OLD_ISO_CODES;
+    private static final String OS_NAME;
+    private static final String OS_ARCH;
+    private static final String OS_VERSION;
+    public static final String USER_LANGUAGE;
+    public static final String USER_LANGUAGE_DISPLAY;
+    public static final String USER_LANGUAGE_FORMAT;
+    public static final String USER_SCRIPT;
+    public static final String USER_SCRIPT_DISPLAY;
+    public static final String USER_SCRIPT_FORMAT;
+    public static final String USER_COUNTRY;
+    public static final String USER_COUNTRY_DISPLAY;
+    public static final String USER_COUNTRY_FORMAT;
+    public static final String USER_VARIANT;
+    public static final String USER_VARIANT_DISPLAY;
+    public static final String USER_VARIANT_FORMAT;
+    public static final String USER_EXTENSIONS;
+    public static final String USER_EXTENSIONS_DISPLAY;
+    public static final String USER_EXTENSIONS_FORMAT;
+    public static final String USER_REGION;
+
+    private StaticProperty() {}
+
+    static {
+        Properties props = System.getProperties();
+        JAVA_HOME = getProperty(props, "java.home");
+        USER_HOME = getProperty(props, "user.home");
+        USER_DIR  = getProperty(props, "user.dir");
+        USER_NAME = getProperty(props, "user.name");
+        JAVA_IO_TMPDIR = getProperty(props, "java.io.tmpdir");
+        JAVA_LIBRARY_PATH = getProperty(props, "java.library.path", "");
+        SUN_BOOT_LIBRARY_PATH = getProperty(props, "sun.boot.library.path", "");
+        JDK_SERIAL_FILTER = getProperty(props, "jdk.serialFilter", null);
+        JDK_SERIAL_FILTER_FACTORY = getProperty(props, "jdk.serialFilterFactory", null);
+        NATIVE_ENCODING = getProperty(props, "native.encoding");
+        FILE_ENCODING = getProperty(props, "file.encoding");
+        JAVA_PROPERTIES_DATE = getProperty(props, "java.properties.date", null);
+        SUN_JNU_ENCODING = getProperty(props, "sun.jnu.encoding");
+        JAVA_LOCALE_USE_OLD_ISO_CODES = getProperty(props, "java.locale.useOldISOCodes", "");
+        OS_NAME = getProperty(props, "os.name");
+        OS_ARCH = getProperty(props, "os.arch");
+        OS_VERSION = getProperty(props, "os.version");
+        USER_LANGUAGE = getProperty(props, "user.language", "en");
+        USER_LANGUAGE_DISPLAY = getProperty(props, "user.language.display", USER_LANGUAGE);
+        USER_LANGUAGE_FORMAT = getProperty(props, "user.language.format", USER_LANGUAGE);
+        USER_SCRIPT = getProperty(props, "user.script", "");
+        USER_SCRIPT_DISPLAY = getProperty(props, "user.script.display", USER_SCRIPT);
+        USER_SCRIPT_FORMAT = getProperty(props, "user.script.format", USER_SCRIPT);
+        USER_COUNTRY = getProperty(props, "user.country", "");
+        USER_COUNTRY_DISPLAY = getProperty(props, "user.country.display", USER_COUNTRY);
+        USER_COUNTRY_FORMAT = getProperty(props, "user.country.format", USER_COUNTRY);
+        USER_VARIANT = getProperty(props, "user.variant", "");
+        USER_VARIANT_DISPLAY = getProperty(props, "user.variant.display", USER_VARIANT);
+        USER_VARIANT_FORMAT = getProperty(props, "user.variant.format", USER_VARIANT);
+        USER_EXTENSIONS = getProperty(props, "user.extensions", "");
+        USER_EXTENSIONS_DISPLAY = getProperty(props, "user.extensions.display", USER_EXTENSIONS);
+        USER_EXTENSIONS_FORMAT = getProperty(props, "user.extensions.format", USER_EXTENSIONS);
+        USER_REGION = getProperty(props, "user.region", "");
+    }
+
+    private static String getProperty(Properties props, String key) {
+        String v = props.getProperty(key);
+        if (v == null) {
+            throw new InternalError("null property: " + key);
+        }
+        return v;
+    }
+
+    private static String getProperty(Properties props, String key,
+                                      String defaultVal) {
+        String v = props.getProperty(key);
+        return (v == null) ? defaultVal : v;
+    }
+
+    /**
+     * {@return the {@code java.home} system property}
+     *
+     * <strong>{@link SecurityManager#checkPropertyAccess} is NOT checked
+     * in this method. The caller of this method should take care to ensure
+     * that the returned property is not made accessible to untrusted code.</strong>
+     */
+    public static String javaHome() {
+        return JAVA_HOME;
+    }
+
+    /**
+     * {@return the {@code user.home} system property}
+     *
+     * <strong>{@link SecurityManager#checkPropertyAccess} is NOT checked
+     * in this method. The caller of this method should take care to ensure
+     * that the returned property is not made accessible to untrusted code.</strong>
+     */
+    public static String userHome() {
+        return USER_HOME;
+    }
+
+    /**
+     * {@return the {@code user.dir} system property}
+     *
+     * <strong>{@link SecurityManager#checkPropertyAccess} is NOT checked
+     * in this method. The caller of this method should take care to ensure
+     * that the returned property is not made accessible to untrusted code.</strong>
+     */
+    public static String userDir() {
+        return USER_DIR;
+    }
+
+    /**
+     * {@return the {@code user.name} system property}
+     *
+     * <strong>{@link SecurityManager#checkPropertyAccess} is NOT checked
+     * in this method. The caller of this method should take care to ensure
+     * that the returned property is not made accessible to untrusted code.</strong>
+     */
+    public static String userName() {
+        return USER_NAME;
+    }
+
+    /**
+     * {@return the {@code java.library.path} system property}
+     *
+     * <strong>{@link SecurityManager#checkPropertyAccess} is NOT checked
+     * in this method. The caller of this method should take care to ensure
+     * that the returned property is not made accessible to untrusted code.</strong>
+     */
+    public static String javaLibraryPath() {
+        return JAVA_LIBRARY_PATH;
+    }
+
+    /**
+     * {@return the {@code java.io.tmpdir} system property}
+     *
+     * <strong>{@link SecurityManager#checkPropertyAccess} is NOT checked
+     * in this method. The caller of this method should take care to ensure
+     * that the returned property is not made accessible to untrusted code.</strong>
+     */
+    public static String javaIoTmpDir() {
+        return JAVA_IO_TMPDIR;
+    }
+
+    /**
+     * {@return the {@code sun.boot.library.path} system property}
+     *
+     * <strong>{@link SecurityManager#checkPropertyAccess} is NOT checked
+     * in this method. The caller of this method should take care to ensure
+     * that the returned property is not made accessible to untrusted code.</strong>
+     */
+    public static String sunBootLibraryPath() {
+        return SUN_BOOT_LIBRARY_PATH;
+    }
+
+
+    /**
+     * {@return the {@code jdk.serialFilter} system property}
+     *
+     * <strong>{@link SecurityManager#checkPropertyAccess} is NOT checked
+     * in this method. The caller of this method should take care to ensure
+     * that the returned property is not made accessible to untrusted code.</strong>
+     */
+    public static String jdkSerialFilter() {
+        return JDK_SERIAL_FILTER;
+    }
+
+
+    /**
+     * {@return the {@code jdk.serialFilterFactory} system property}
+     *
+     * <strong>{@link SecurityManager#checkPropertyAccess} is NOT checked
+     * in this method. The caller of this method should take care to ensure
+     * that the returned property is not made accessible to untrusted code.</strong>
+     */
+    public static String jdkSerialFilterFactory() {
+        return JDK_SERIAL_FILTER_FACTORY;
+    }
+
+    /**
+     * {@return the {@code native.encoding} system property}
+     *
+     * <strong>{@link SecurityManager#checkPropertyAccess} is NOT checked
+     * in this method. The caller of this method should take care to ensure
+     * that the returned property is not made accessible to untrusted code.</strong>
+     */
+    public static String nativeEncoding() {
+        return NATIVE_ENCODING;
+    }
+
+    /**
+     * {@return the {@code file.encoding} system property}
+     *
+     * <strong>{@link SecurityManager#checkPropertyAccess} is NOT checked
+     * in this method. The caller of this method should take care to ensure
+     * that the returned property is not made accessible to untrusted code.</strong>
+     */
+    public static String fileEncoding() {
+        return FILE_ENCODING;
+    }
+
+    /**
+     * {@return the {@code java.properties.date} system property}
+     *
+     * <strong>{@link SecurityManager#checkPropertyAccess} is NOT checked
+     * in this method.</strong>
+     */
+    public static String javaPropertiesDate() {
+        return JAVA_PROPERTIES_DATE;
+    }
+
+    /**
+     * {@return the {@code sun.jnu.encoding} system property}
+     *
+     * <strong>{@link SecurityManager#checkPropertyAccess} is NOT checked
+     * in this method. The caller of this method should take care to ensure
+     * that the returned property is not made accessible to untrusted code.</strong>
+     */
+    public static String jnuEncoding() {
+        return SUN_JNU_ENCODING;
+    }
+
+    /**
+     * {@return the {@code java.locale.useOldISOCodes} system property}
+     *
+     * <strong>{@link SecurityManager#checkPropertyAccess} is NOT checked
+     * in this method. The caller of this method should take care to ensure
+     * that the returned property is not made accessible to untrusted code.</strong>
+     */
+    public static String javaLocaleUseOldISOCodes() {
+        return JAVA_LOCALE_USE_OLD_ISO_CODES;
+    }
+
+     /**
+      * {@return the {@code os.name} system property}
+      * <strong>{@link SecurityManager#checkPropertyAccess} is NOT checked
+      * in this method. This property is not considered security sensitive.</strong>
+      */
+     public static String osName() {
+         return OS_NAME;
+     }
+
+     /**
+      * {@return the {@code os.arch} system property}
+      * <strong>{@link SecurityManager#checkPropertyAccess} is NOT checked
+      * in this method. This property is not considered security sensitive.</strong>
+      */
+     public static String osArch() {
+         return OS_ARCH;
+     }
+
+     /**
+      * {@return the {@code os.version} system property}
+      * <strong>{@link SecurityManager#checkPropertyAccess} is NOT checked
+      * in this method. This property is not considered security sensitive.</strong>
+      */
+     public static String osVersion() {
+         return OS_VERSION;
+     }
+}
diff --git a/tests/test_data/std/jdk/internal/util/StrongReferenceKey.class b/tests/test_data/std/jdk/internal/util/StrongReferenceKey.class
new file mode 100644
index 0000000000000000000000000000000000000000..504743131fa00a8ffcf9702b1a78a48316977155
GIT binary patch
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/util/StrongReferenceKey.java b/tests/test_data/std/jdk/internal/util/StrongReferenceKey.java
new file mode 100644
index 00000000..e3264cd0
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/util/StrongReferenceKey.java
@@ -0,0 +1,82 @@
+/*
+ * Copyright (c) 2023, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package jdk.internal.util;
+
+import java.util.Objects;
+
+/**
+ * Wrapper for querying the backing map. Avoids the overhead of an
+ * {@link java.lang.ref.Reference} object.
+ *
+ * @param <T> key type
+ *
+ * @since 21
+ */
+final class StrongReferenceKey<T> implements ReferenceKey<T> {
+    T key;
+
+    /**
+     * Package-Protected constructor.
+     *
+     * @param key unwrapped key value
+     */
+    StrongReferenceKey(T key) {
+        this.key = key;
+    }
+
+    /**
+     * {@return the unwrapped key}
+     */
+    @Override
+    public T get() {
+        return key;
+    }
+
+    @Override
+    public void unused() {
+        key = null;
+    }
+
+    @Override
+    public boolean equals(Object obj) {
+        // Necessary when comparing an unwrapped key
+        if (obj instanceof ReferenceKey<?> key) {
+            obj = key.get();
+        }
+        return Objects.equals(get(), obj);
+    }
+
+    @Override
+    public int hashCode() {
+        // Use unwrapped key hash code
+        return get().hashCode();
+    }
+
+    @Override
+    public String toString() {
+        return this.getClass().getCanonicalName() + "#" + System.identityHashCode(this);
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/util/SystemProps$Raw.class b/tests/test_data/std/jdk/internal/util/SystemProps$Raw.class
new file mode 100644
index 0000000000000000000000000000000000000000..c08206f0c326f2a26c2622e0ea2ebf2eebb62773
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diff --git a/tests/test_data/std/jdk/internal/util/SystemProps.class b/tests/test_data/std/jdk/internal/util/SystemProps.class
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HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/util/SystemProps.java b/tests/test_data/std/jdk/internal/util/SystemProps.java
new file mode 100644
index 00000000..b6aa1ef8
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/util/SystemProps.java
@@ -0,0 +1,322 @@
+/*
+ * Copyright (c) 2018, 2022, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package jdk.internal.util;
+
+
+import java.lang.annotation.Native;
+import java.util.HashMap;
+import java.util.Map;
+import java.io.File;
+
+/**
+ * System Property initialization for internal use only
+ * Retrieves the platform, JVM, and command line properties,
+ * applies initial defaults and returns the Properties instance
+ * that becomes the System.getProperties instance.
+ */
+public final class SystemProps {
+
+    // no instances
+    private SystemProps() {}
+
+    // Custom java.io.tmpdir via command line.
+    private static String customTmpdir;
+
+    /**
+     * Check if warning for custom java.io.tmpdir is required.
+     *
+     * @return a boolean value
+     */
+    public static boolean isBadIoTmpdir() {
+        return customTmpdir != null && !(new File(customTmpdir).isDirectory());
+    }
+
+    /**
+     * Create and initialize the system properties from the native properties
+     * and command line properties.
+     * Note:  Build-defined properties such as versions and vendor information
+     * are initialized by VersionProps.java-template.
+     *
+     * @return a Properties instance initialized with all of the properties
+     */
+    public static Map<String, String> initProperties() {
+
+        // Initially, cmdProperties only includes -D and props from the VM
+        Raw raw = new Raw();
+        HashMap<String, String> props = raw.cmdProperties();
+
+        String javaHome = props.get("java.home");
+        assert javaHome != null : "java.home not set";
+
+        putIfAbsent(props, "user.home", raw.propDefault(Raw._user_home_NDX));
+        putIfAbsent(props, "user.dir", raw.propDefault(Raw._user_dir_NDX));
+        putIfAbsent(props, "user.name", raw.propDefault(Raw._user_name_NDX));
+
+        // Platform defined encoding cannot be overridden on the command line
+        put(props, "sun.jnu.encoding", raw.propDefault(Raw._sun_jnu_encoding_NDX));
+        var nativeEncoding = ((raw.propDefault(Raw._file_encoding_NDX) == null)
+                ? raw.propDefault(Raw._sun_jnu_encoding_NDX)
+                : raw.propDefault(Raw._file_encoding_NDX));
+        put(props, "native.encoding", nativeEncoding);
+
+        // "file.encoding" defaults to "UTF-8", unless specified in the command line
+        // where "COMPAT" designates the native encoding.
+        var fileEncoding = props.getOrDefault("file.encoding", "UTF-8");
+        if ("COMPAT".equals(fileEncoding)) {
+            put(props, "file.encoding", nativeEncoding);
+        } else {
+            putIfAbsent(props, "file.encoding", fileEncoding);
+        }
+
+        // "stdout/err.encoding", prepared for System.out/err. For compatibility
+        // purposes, substitute them with "sun.*" if they don't exist. If "sun.*" aren't
+        // available either, fall back to "native.encoding".
+        putIfAbsent(props, "stdout.encoding", props.getOrDefault("sun.stdout.encoding",
+                raw.propDefault(Raw._stdout_encoding_NDX)));
+        putIfAbsent(props, "stdout.encoding", nativeEncoding);
+        putIfAbsent(props, "stderr.encoding", props.getOrDefault("sun.stderr.encoding",
+                raw.propDefault(Raw._stderr_encoding_NDX)));
+        putIfAbsent(props, "stderr.encoding", nativeEncoding);
+
+        // Use platform values if not overridden by a commandline -Dkey=value
+        // In no particular order
+        putIfAbsent(props, "os.name", raw.propDefault(Raw._os_name_NDX));
+        putIfAbsent(props, "os.arch", raw.propDefault(Raw._os_arch_NDX));
+        putIfAbsent(props, "os.version", raw.propDefault(Raw._os_version_NDX));
+        putIfAbsent(props, "line.separator", raw.propDefault(Raw._line_separator_NDX));
+        putIfAbsent(props, "file.separator", raw.propDefault(Raw._file_separator_NDX));
+        putIfAbsent(props, "path.separator", raw.propDefault(Raw._path_separator_NDX));
+
+        customTmpdir = props.get("java.io.tmpdir");
+        putIfAbsent(props, "java.io.tmpdir", raw.propDefault(Raw._java_io_tmpdir_NDX));
+        putIfAbsent(props, "http.proxyHost", raw.propDefault(Raw._http_proxyHost_NDX));
+        putIfAbsent(props, "http.proxyPort", raw.propDefault(Raw._http_proxyPort_NDX));
+        putIfAbsent(props, "https.proxyHost", raw.propDefault(Raw._https_proxyHost_NDX));
+        putIfAbsent(props, "https.proxyPort", raw.propDefault(Raw._https_proxyPort_NDX));
+        putIfAbsent(props, "ftp.proxyHost", raw.propDefault(Raw._ftp_proxyHost_NDX));
+        putIfAbsent(props, "ftp.proxyPort", raw.propDefault(Raw._ftp_proxyPort_NDX));
+        putIfAbsent(props, "socksProxyHost", raw.propDefault(Raw._socksProxyHost_NDX));
+        putIfAbsent(props, "socksProxyPort", raw.propDefault(Raw._socksProxyPort_NDX));
+        putIfAbsent(props, "http.nonProxyHosts", raw.propDefault(Raw._http_nonProxyHosts_NDX));
+        putIfAbsent(props, "ftp.nonProxyHosts", raw.propDefault(Raw._ftp_nonProxyHosts_NDX));
+        putIfAbsent(props, "socksNonProxyHosts", raw.propDefault(Raw._socksNonProxyHosts_NDX));
+        putIfAbsent(props, "sun.arch.abi", raw.propDefault(Raw._sun_arch_abi_NDX));
+        putIfAbsent(props, "sun.arch.data.model", raw.propDefault(Raw._sun_arch_data_model_NDX));
+        putIfAbsent(props, "sun.os.patch.level", raw.propDefault(Raw._sun_os_patch_level_NDX));
+        putIfAbsent(props, "sun.io.unicode.encoding", raw.propDefault(Raw._sun_io_unicode_encoding_NDX));
+        putIfAbsent(props, "sun.cpu.isalist", raw.propDefault(Raw._sun_cpu_isalist_NDX));
+        putIfAbsent(props, "sun.cpu.endian", raw.propDefault(Raw._sun_cpu_endian_NDX));
+
+        /* Construct i18n related options */
+        fillI18nProps(props,"user.language", raw.propDefault(Raw._display_language_NDX),
+                raw.propDefault(Raw._format_language_NDX));
+        fillI18nProps(props,"user.script",   raw.propDefault(Raw._display_script_NDX),
+                raw.propDefault(Raw._format_script_NDX));
+        fillI18nProps(props,"user.country",  raw.propDefault(Raw._display_country_NDX),
+                raw.propDefault(Raw._format_country_NDX));
+        fillI18nProps(props,"user.variant",  raw.propDefault(Raw._display_variant_NDX),
+                raw.propDefault(Raw._format_variant_NDX));
+
+        return props;
+    }
+
+    /**
+     * Puts the property if it is non-null
+     * @param props the Properties
+     * @param key the key
+     * @param value the value
+     */
+    private static void put(HashMap<String, String> props, String key, String value) {
+        if (value != null) {
+            props.put(key, value);
+        }
+    }
+
+    /**
+     * Puts the property if it is non-null and is not already in the Properties.
+     * @param props the Properties
+     * @param key the key
+     * @param value the value
+     */
+    private static void putIfAbsent(HashMap<String, String> props, String key, String value) {
+        if (value != null) {
+            props.putIfAbsent(key, value);
+        }
+    }
+
+    /**
+     * For internationalization options, compute the values for
+     * display and format properties
+     * MUST NOT override command line defined values.
+     *
+     * @param base the base property name
+     * @param display the display value for the base
+     * @param format the format value for the base
+     */
+    private static void fillI18nProps(HashMap<String, String> cmdProps,
+                                      String base,
+                                      String display,
+                                      String format) {
+        // Do not override command line setting
+        String baseValue = cmdProps.get(base);
+        if (baseValue != null) {
+            return;     // Do not override value from the command line
+        }
+
+        // Not overridden on the command line; define the properties if there are platform defined values
+        if (display != null) {
+            cmdProps.put(base, display);
+            baseValue = display;
+        }
+
+        /* user.xxx.display property */
+        String disp = base.concat(".display");
+        String dispValue = cmdProps.get(disp);
+        if (dispValue == null && display != null && !display.equals(baseValue)) {
+            // Create the property only if different from the base property
+            cmdProps.put(disp, display);
+        }
+
+        /* user.xxx.format property */
+        String fmt = base.concat(".format");
+        String fmtValue = cmdProps.get(fmt);
+        if (fmtValue == null && format != null && !format.equals(baseValue)) {
+            // Create the property only if different than the base property
+            cmdProps.put(fmt, format);
+        }
+    }
+
+    /**
+     * Read the raw properties from native System.c.
+     */
+    public static class Raw {
+        // Array indices written by native vmProperties()
+        // The order is arbitrary (but alphabetic for convenience)
+        @Native private static final int _display_country_NDX = 0;
+        @Native private static final int _display_language_NDX = 1 + _display_country_NDX;
+        @Native private static final int _display_script_NDX = 1 + _display_language_NDX;
+        @Native private static final int _display_variant_NDX = 1 + _display_script_NDX;
+        @Native private static final int _file_encoding_NDX = 1 + _display_variant_NDX;
+        @Native private static final int _file_separator_NDX = 1 + _file_encoding_NDX;
+        @Native private static final int _format_country_NDX = 1 + _file_separator_NDX;
+        @Native private static final int _format_language_NDX = 1 + _format_country_NDX;
+        @Native private static final int _format_script_NDX = 1 + _format_language_NDX;
+        @Native private static final int _format_variant_NDX = 1 + _format_script_NDX;
+        @Native private static final int _ftp_nonProxyHosts_NDX = 1 + _format_variant_NDX;
+        @Native private static final int _ftp_proxyHost_NDX = 1 + _ftp_nonProxyHosts_NDX;
+        @Native private static final int _ftp_proxyPort_NDX = 1 + _ftp_proxyHost_NDX;
+        @Native private static final int _http_nonProxyHosts_NDX = 1 + _ftp_proxyPort_NDX;
+        @Native private static final int _http_proxyHost_NDX = 1 + _http_nonProxyHosts_NDX;
+        @Native private static final int _http_proxyPort_NDX = 1 + _http_proxyHost_NDX;
+        @Native private static final int _https_proxyHost_NDX = 1 + _http_proxyPort_NDX;
+        @Native private static final int _https_proxyPort_NDX = 1 + _https_proxyHost_NDX;
+        @Native private static final int _java_io_tmpdir_NDX = 1 + _https_proxyPort_NDX;
+        @Native private static final int _line_separator_NDX = 1 + _java_io_tmpdir_NDX;
+        @Native private static final int _os_arch_NDX = 1 + _line_separator_NDX;
+        @Native private static final int _os_name_NDX = 1 + _os_arch_NDX;
+        @Native private static final int _os_version_NDX = 1 + _os_name_NDX;
+        @Native private static final int _path_separator_NDX = 1 + _os_version_NDX;
+        @Native private static final int _socksNonProxyHosts_NDX = 1 + _path_separator_NDX;
+        @Native private static final int _socksProxyHost_NDX = 1 + _socksNonProxyHosts_NDX;
+        @Native private static final int _socksProxyPort_NDX = 1 + _socksProxyHost_NDX;
+        @Native private static final int _stderr_encoding_NDX = 1 + _socksProxyPort_NDX;
+        @Native private static final int _stdout_encoding_NDX = 1 + _stderr_encoding_NDX;
+        @Native private static final int _sun_arch_abi_NDX = 1 + _stdout_encoding_NDX;
+        @Native private static final int _sun_arch_data_model_NDX = 1 + _sun_arch_abi_NDX;
+        @Native private static final int _sun_cpu_endian_NDX = 1 + _sun_arch_data_model_NDX;
+        @Native private static final int _sun_cpu_isalist_NDX = 1 + _sun_cpu_endian_NDX;
+        @Native private static final int _sun_io_unicode_encoding_NDX = 1 + _sun_cpu_isalist_NDX;
+        @Native private static final int _sun_jnu_encoding_NDX = 1 + _sun_io_unicode_encoding_NDX;
+        @Native private static final int _sun_os_patch_level_NDX = 1 + _sun_jnu_encoding_NDX;
+        @Native private static final int _user_dir_NDX = 1 + _sun_os_patch_level_NDX;
+        @Native private static final int _user_home_NDX = 1 + _user_dir_NDX;
+        @Native private static final int _user_name_NDX = 1 + _user_home_NDX;
+        @Native private static final int FIXED_LENGTH = 1 + _user_name_NDX;
+
+        // Array of Strings returned from the VM and Command line properties
+        // The array is not used after initialization is complete.
+        private final String[] platformProps;
+
+        private Raw() {
+            platformProps = platformProperties();
+        }
+
+        /**
+         * Return the value for a well known default from native.
+         * @param index the index of the known property
+         * @return the value
+         */
+        String propDefault(int index) {
+            return platformProps[index];
+        }
+
+        /**
+         * Return a Properties instance of the command line and VM options
+         * defined by name and value.
+         * The Properties instance is sized to include the fixed properties.
+         *
+         * @return return a Properties instance of the command line and VM options
+         */
+        private HashMap<String, String> cmdProperties() {
+            String[] vmProps = vmProperties();
+            // While optimal initialCapacity here would be the exact number of properties
+            // divided by LOAD_FACTOR, a large portion of the properties in Raw are
+            // usually not set, so for typical cases the chosen capacity avoids resizing
+            var cmdProps = new HashMap<String, String>((vmProps.length / 2) + Raw.FIXED_LENGTH);
+            for (int i = 0; i < vmProps.length;) {
+                String k = vmProps[i++];
+                if (k != null) {
+                    String v = vmProps[i++];
+                    cmdProps.put(k, v != null ? v : "");
+                } else {
+                    // no more key/value pairs
+                    break;
+                }
+            }
+            return cmdProps;
+        }
+
+        /**
+         * Returns the available VM and Command Line Properties.
+         * The VM supplies some key/value pairs and processes the command line
+         * to extract key/value pairs from the {@code "-Dkey=value"} arguments.
+         *
+         * @return an array of strings, with alternating key and value strings.
+         *      Either keys or values may be null, the array may not be full.
+         *      The first null key indicates there are no more key, value pairs.
+         */
+        private static native String[] vmProperties();
+
+        /**
+         * Returns the platform specific property values identified
+         * by {@code "_xxx_NDX"} indexes.
+         * The indexes are strictly private, to be shared only with the native code.
+         *
+         * @return a array of strings, the properties are indexed by the {@code _xxx_NDX}
+         * indexes.  The values are Strings and may be null.
+         */
+        private static native String[] platformProperties();
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/util/WeakReferenceKey.class b/tests/test_data/std/jdk/internal/util/WeakReferenceKey.class
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diff --git a/tests/test_data/std/jdk/internal/util/WeakReferenceKey.java b/tests/test_data/std/jdk/internal/util/WeakReferenceKey.java
new file mode 100644
index 00000000..3fe6d602
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/util/WeakReferenceKey.java
@@ -0,0 +1,91 @@
+/*
+ * Copyright (c) 2023, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package jdk.internal.util;
+
+import java.lang.ref.ReferenceQueue;
+import java.lang.ref.WeakReference;
+import java.util.Objects;
+
+/**
+ * {@link WeakReference} wrapper key for entries in the backing map.
+ *
+ * @param <T> key type
+ *
+ * @since 21
+ */
+final class WeakReferenceKey<T> extends WeakReference<T> implements ReferenceKey<T> {
+    /**
+     * Saved hashcode of the key. Used when {@link WeakReference} is
+     * null.
+     */
+    private final int hashcode;
+
+    /**
+     * Package-Protected constructor.
+     *
+     * @param key   unwrapped key value
+     * @param queue reference queue
+     */
+    WeakReferenceKey(T key, ReferenceQueue<T> queue) {
+        super(key, queue);
+        this.hashcode = Objects.hashCode(key);
+    }
+
+    /**
+     * Cleanup unused key. No need to enqueue since the key did not make it
+     * into the map.
+     */
+    @Override
+    public void unused() {
+        clear();
+    }
+
+    @Override
+    public boolean equals(Object obj) {
+        // Necessary when removing a null reference
+        if (obj == this) {
+            return true;
+        }
+        // Necessary when comparing an unwrapped key
+        if (obj instanceof ReferenceKey<?> key) {
+            obj = key.get();
+        }
+        // Note: refersTo is insufficient since keys require equivalence.
+        // refersTo would also require a cast to type T.
+        return Objects.equals(get(), obj);
+    }
+
+    @Override
+    public int hashCode() {
+        // Use saved hashcode
+        return hashcode;
+    }
+
+    @Override
+    public String toString() {
+        return this.getClass().getCanonicalName() + "#" + System.identityHashCode(this);
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/util/random/RandomSupport$AbstractArbitrarilyJumpableGenerator$RandomArbitraryJumpsSpliterator.class b/tests/test_data/std/jdk/internal/util/random/RandomSupport$AbstractArbitrarilyJumpableGenerator$RandomArbitraryJumpsSpliterator.class
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diff --git a/tests/test_data/std/jdk/internal/util/random/RandomSupport$AbstractArbitrarilyJumpableGenerator$RandomDoublesSpliterator.class b/tests/test_data/std/jdk/internal/util/random/RandomSupport$AbstractArbitrarilyJumpableGenerator$RandomDoublesSpliterator.class
new file mode 100644
index 0000000000000000000000000000000000000000..43ff2b6b83efb6ea9404c01a4ce06fb389720343
GIT binary patch
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literal 0
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diff --git a/tests/test_data/std/jdk/internal/util/random/RandomSupport$AbstractArbitrarilyJumpableGenerator$RandomIntsSpliterator.class b/tests/test_data/std/jdk/internal/util/random/RandomSupport$AbstractArbitrarilyJumpableGenerator$RandomIntsSpliterator.class
new file mode 100644
index 0000000000000000000000000000000000000000..1b03f6c9e1cf84abe5afbbe0067fdec17e335083
GIT binary patch
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diff --git a/tests/test_data/std/jdk/internal/util/random/RandomSupport$AbstractArbitrarilyJumpableGenerator$RandomJumpsSpliterator.class b/tests/test_data/std/jdk/internal/util/random/RandomSupport$AbstractArbitrarilyJumpableGenerator$RandomJumpsSpliterator.class
new file mode 100644
index 0000000000000000000000000000000000000000..5e682f0fc3e89a954347d5b10e7edc7a0f2f7d61
GIT binary patch
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diff --git a/tests/test_data/std/jdk/internal/util/random/RandomSupport$AbstractArbitrarilyJumpableGenerator$RandomLeapsSpliterator.class b/tests/test_data/std/jdk/internal/util/random/RandomSupport$AbstractArbitrarilyJumpableGenerator$RandomLeapsSpliterator.class
new file mode 100644
index 0000000000000000000000000000000000000000..bc5ea3499ae4bc24bfdce6c234888cc730d827e3
GIT binary patch
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diff --git a/tests/test_data/std/jdk/internal/util/random/RandomSupport$AbstractArbitrarilyJumpableGenerator$RandomLongsSpliterator.class b/tests/test_data/std/jdk/internal/util/random/RandomSupport$AbstractArbitrarilyJumpableGenerator$RandomLongsSpliterator.class
new file mode 100644
index 0000000000000000000000000000000000000000..d957b5fcb2eb8b57664156af7b88c0c5f116c355
GIT binary patch
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diff --git a/tests/test_data/std/jdk/internal/util/random/RandomSupport$AbstractArbitrarilyJumpableGenerator.class b/tests/test_data/std/jdk/internal/util/random/RandomSupport$AbstractArbitrarilyJumpableGenerator.class
new file mode 100644
index 0000000000000000000000000000000000000000..23ab3a5f7ee661675713e013e628447d3b622661
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diff --git a/tests/test_data/std/jdk/internal/util/random/RandomSupport$AbstractSpliteratorGenerator.class b/tests/test_data/std/jdk/internal/util/random/RandomSupport$AbstractSpliteratorGenerator.class
new file mode 100644
index 0000000000000000000000000000000000000000..e4435d6cc11d1e7c464df24bf68e684da0b5c85e
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diff --git a/tests/test_data/std/jdk/internal/util/random/RandomSupport$AbstractSplittableGenerator$RandomDoublesSpliterator.class b/tests/test_data/std/jdk/internal/util/random/RandomSupport$AbstractSplittableGenerator$RandomDoublesSpliterator.class
new file mode 100644
index 0000000000000000000000000000000000000000..b6972e8f1d68dc031fb2b5b53ad82a20fb06d272
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diff --git a/tests/test_data/std/jdk/internal/util/random/RandomSupport$AbstractSplittableGenerator$RandomIntsSpliterator.class b/tests/test_data/std/jdk/internal/util/random/RandomSupport$AbstractSplittableGenerator$RandomIntsSpliterator.class
new file mode 100644
index 0000000000000000000000000000000000000000..17912b77f9b74564dba006310a6449ecac2cf3ac
GIT binary patch
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diff --git a/tests/test_data/std/jdk/internal/util/random/RandomSupport$AbstractSplittableGenerator$RandomLongsSpliterator.class b/tests/test_data/std/jdk/internal/util/random/RandomSupport$AbstractSplittableGenerator$RandomLongsSpliterator.class
new file mode 100644
index 0000000000000000000000000000000000000000..8fd814c04e0d2a4b100c04579339d4b365b1ae34
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diff --git a/tests/test_data/std/jdk/internal/util/random/RandomSupport$AbstractSplittableGenerator$RandomSplitsSpliterator.class b/tests/test_data/std/jdk/internal/util/random/RandomSupport$AbstractSplittableGenerator$RandomSplitsSpliterator.class
new file mode 100644
index 0000000000000000000000000000000000000000..6e0990fb6fb148b6ab87ff6277eca3ccae1bd3a5
GIT binary patch
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literal 0
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diff --git a/tests/test_data/std/jdk/internal/util/random/RandomSupport$AbstractSplittableGenerator.class b/tests/test_data/std/jdk/internal/util/random/RandomSupport$AbstractSplittableGenerator.class
new file mode 100644
index 0000000000000000000000000000000000000000..66683dcc7651226bc1b8eabbddcd910c1f0a8994
GIT binary patch
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literal 0
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diff --git a/tests/test_data/std/jdk/internal/util/random/RandomSupport$AbstractSplittableWithBrineGenerator$RandomSplitsSpliteratorWithSalt.class b/tests/test_data/std/jdk/internal/util/random/RandomSupport$AbstractSplittableWithBrineGenerator$RandomSplitsSpliteratorWithSalt.class
new file mode 100644
index 0000000000000000000000000000000000000000..50ce1a882d63a55f7f4bea2462d2b5e96b7319c7
GIT binary patch
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diff --git a/tests/test_data/std/jdk/internal/util/random/RandomSupport$AbstractSplittableWithBrineGenerator.class b/tests/test_data/std/jdk/internal/util/random/RandomSupport$AbstractSplittableWithBrineGenerator.class
new file mode 100644
index 0000000000000000000000000000000000000000..5cac40faa1996344a0d8a537ede0ffaec0f24756
GIT binary patch
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diff --git a/tests/test_data/std/jdk/internal/util/random/RandomSupport$DoubleZigguratTables.class b/tests/test_data/std/jdk/internal/util/random/RandomSupport$DoubleZigguratTables.class
new file mode 100644
index 0000000000000000000000000000000000000000..3d591e91c66ea2de171869cf77ac6915f271113f
GIT binary patch
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new file mode 100644
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new file mode 100644
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diff --git a/tests/test_data/std/jdk/internal/util/random/RandomSupport.java b/tests/test_data/std/jdk/internal/util/random/RandomSupport.java
new file mode 100644
index 00000000..402be6b5
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/util/random/RandomSupport.java
@@ -0,0 +1,3027 @@
+/*
+ * Copyright (c) 2020, 2024, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package jdk.internal.util.random;
+
+import java.util.Objects;
+import java.util.function.Consumer;
+import java.util.function.DoubleConsumer;
+import java.util.function.IntConsumer;
+import java.util.function.LongConsumer;
+import java.util.random.RandomGenerator;
+import java.util.random.RandomGenerator.SplittableGenerator;
+import java.util.Spliterator;
+import java.util.stream.DoubleStream;
+import java.util.stream.IntStream;
+import java.util.stream.LongStream;
+import java.util.stream.Stream;
+import java.util.stream.StreamSupport;
+
+/**
+ * Low-level utility methods helpful for implementing pseudorandom number
+ * generators.
+ *
+ * <p> This class is mostly for library writers creating specific
+ * implementations of the interface {@link RandomGenerator}. As an
+ * internal package it is not intended for general use.
+ *
+ * @since 17
+ */
+public class RandomSupport {
+    /*
+     * Implementation Overview.
+     *
+     * This class provides utility methods and constants frequently
+     * useful in the implementation of pseudorandom number generators
+     * that satisfy the interface {@link RandomGenerator}.
+     *
+     * File organization: First some message strings, then the main
+     * public methods, followed by a non-public base spliterator class.
+     */
+
+    // IllegalArgumentException messages
+    public static final String BAD_SIZE = "size must be non-negative";
+    public static final String BAD_DISTANCE = "jump distance must be finite, positive, and an exact integer";
+    public static final String BAD_BOUND = "bound must be positive";
+    public static final String BAD_FLOATING_BOUND = "bound must be finite and positive";
+    public static final String BAD_RANGE = "bound must be greater than origin";
+
+    /* ---------------- explicit constructor ---------------- */
+
+    /**
+     * Explicit constructor.
+     */
+    protected RandomSupport() {
+    }
+
+    /* ---------------- public methods ---------------- */
+
+    /**
+     * Check a {@code long} proposed stream size for validity.
+     *
+     * @param streamSize the proposed stream size
+     *
+     * @throws IllegalArgumentException if {@code streamSize} is negative
+     */
+    public static void checkStreamSize(long streamSize) {
+        if (streamSize < 0L) {
+            throw new IllegalArgumentException(BAD_SIZE);
+        }
+    }
+
+    /**
+     * Checks a {@code float} upper bound value for validity.
+     *
+     * @param bound the upper bound (exclusive)
+     *
+     * @throws IllegalArgumentException if {@code bound} fails to be positive and finite
+     */
+    public static void checkBound(float bound) {
+        if (!(0.0f < bound && bound < Float.POSITIVE_INFINITY)) {
+            throw new IllegalArgumentException(BAD_FLOATING_BOUND);
+        }
+    }
+
+    /**
+     * Checks a {@code double} upper bound value for validity.
+     *
+     * @param bound the upper bound (exclusive)
+     *
+     * @throws IllegalArgumentException if {@code bound} fails to be positive and finite
+     */
+    public static void checkBound(double bound) {
+        if (!(0.0 < bound && bound < Double.POSITIVE_INFINITY)) {
+            throw new IllegalArgumentException(BAD_FLOATING_BOUND);
+        }
+    }
+
+    /**
+     * Checks an {@code int} upper bound value for validity.
+     *
+     * @param bound the upper bound (exclusive)
+     *
+     * @throws IllegalArgumentException if {@code bound} is not positive
+     */
+    public static void checkBound(int bound) {
+        if (bound <= 0) {
+            throw new IllegalArgumentException(BAD_BOUND);
+        }
+    }
+
+    /**
+     * Checks a {@code long} upper bound value for validity.
+     *
+     * @param bound the upper bound (exclusive)
+     *
+     * @throws IllegalArgumentException if {@code bound} is not positive
+     */
+    public static void checkBound(long bound) {
+        if (bound <= 0) {
+            throw new IllegalArgumentException(BAD_BOUND);
+        }
+    }
+
+    /**
+     * Checks a {@code float} range for validity.
+     *
+     * @param origin the least value (inclusive) in the range
+     * @param bound  the upper bound (exclusive) of the range
+     *
+     * @throws IllegalArgumentException if {@code origin} is not finite,
+     *          or {@code bound} is not finite, or {@code origin}
+     *          is greater than or equal to {@code bound}
+     */
+    public static void checkRange(float origin, float bound) {
+        if (!(Float.NEGATIVE_INFINITY < origin && origin < bound &&
+                bound < Float.POSITIVE_INFINITY)) {
+            throw new IllegalArgumentException(BAD_RANGE);
+        }
+    }
+
+    /**
+     * Checks a {@code double} range for validity.
+     *
+     * @param origin the least value (inclusive) in the range
+     * @param bound  the upper bound (exclusive) of the range
+     *
+     * @throws IllegalArgumentException if {@code origin} is not finite,
+     *          or {@code bound} is not finite, or {@code origin}
+     *          is greater than or equal to {@code bound}
+     */
+    public static void checkRange(double origin, double bound) {
+        if (!(Double.NEGATIVE_INFINITY < origin && origin < bound &&
+                bound < Double.POSITIVE_INFINITY)) {
+            throw new IllegalArgumentException(BAD_RANGE);
+        }
+    }
+
+    /**
+     * Checks an {@code int} range for validity.
+     *
+     * @param origin the least value that can be returned
+     * @param bound  the upper bound (exclusive) for the returned value
+     *
+     * @throws IllegalArgumentException if {@code origin} is greater than or equal to {@code bound}
+     */
+    public static void checkRange(int origin, int bound) {
+        if (origin >= bound) {
+            throw new IllegalArgumentException(BAD_RANGE);
+        }
+    }
+
+    /**
+     * Checks a {@code long} range for validity.
+     *
+     * @param origin the least value that can be returned
+     * @param bound  the upper bound (exclusive) for the returned value
+     *
+     * @throws IllegalArgumentException if {@code origin} is greater than or equal to {@code bound}
+     */
+    public static void checkRange(long origin, long bound) {
+        if (origin >= bound) {
+            throw new IllegalArgumentException(BAD_RANGE);
+        }
+    }
+
+    /**
+     * Given an array of seed bytes of any length, construct an array of
+     * {@code long} seed values of length {@code n}, such that the last
+     * {@code z} values are not all zero.
+     *
+     * @param seed an array of {@code byte} values
+     * @param n the length of the result array (should be nonnegative)
+     * @param z the number of trailing result elements that are required
+     *        to be not all zero (should be nonnegative but not larger
+     *        than {@code n})
+     *
+     * @return an array of length {@code n} containing {@code long} seed values
+     */
+    public static long[] convertSeedBytesToLongs(byte[] seed, int n, int z) {
+        final long[] result = new long[n];
+        final int m = Math.min(seed.length, n << 3);
+        // Distribute seed bytes into the words to be formed.
+        for (int j = 0; j < m; j++) {
+            result[j>>3] = (result[j>>3] << 8) | (seed[j] & 0xFF);
+        }
+        // If there aren't enough seed bytes for all the words we need,
+        // use a SplitMix-style PRNG to fill in the rest.
+        long v = result[0];
+        for (int j = (m + 7) >> 3; j < n; j++) {
+            result[j] = mixMurmur64(v += SILVER_RATIO_64);
+        }
+        // Finally, we need to make sure the last z words are not all zero.
+        search: {
+            for (int j = n - z; j < n; j++) {
+                if (result[j] != 0) break search;
+            }
+            // If they are, fill in using a SplitMix-style PRNG.
+            // Using "& ~1L" in the next line defends against the case z==1
+            // by guaranteeing that the first generated value will be nonzero.
+            long w = result[0] & ~1L;
+            for (int j = n - z; j < n; j++) {
+                result[j] = mixMurmur64(w += SILVER_RATIO_64);
+            }
+        }
+
+        return result;
+    }
+
+    /**
+     * Given an array of seed bytes of any length, construct an array of
+     * {@code int} seed values of length {@code n}, such that the last {@code z}
+     * values are not all zero.
+     *
+     * @param seed an array of {@code byte} values
+     * @param n the length of the result array (should be nonnegative)
+     * @param z the number of trailing result elements that are required
+     *        to be not all zero (should be nonnegative but not larger
+     *        than {@code n})
+     *
+     * @return an array of length {@code n} containing {@code int} seed values
+     */
+    public static int[] convertSeedBytesToInts(byte[] seed, int n, int z) {
+        final int[] result = new int[n];
+        final int m = Math.min(seed.length, n << 2);
+        // Distribute seed bytes into the words to be formed.
+        for (int j = 0; j < m; j++) {
+            result[j>>2] = (result[j>>2] << 8) | (seed[j] & 0xFF);
+        }
+        // If there aren't enough seed bytes for all the words we need,
+        // use a SplitMix-style PRNG to fill in the rest.
+        int v = result[0];
+        for (int j = (m + 3) >> 2; j < n; j++) {
+            result[j] = mixMurmur32(v += SILVER_RATIO_32);
+        }
+        // Finally, we need to make sure the last z words are not all zero.
+        search: {
+            for (int j = n - z; j < n; j++) {
+                if (result[j] != 0) break search;
+            }
+            // If they are, fill in using a SplitMix-style PRNG.
+            // Using "& ~1" in the next line defends against the case z==1
+            // by guaranteeing that the first generated value will be nonzero.
+            int w = result[0] & ~1;
+            for (int j = n - z; j < n; j++) {
+                result[j] = mixMurmur32(w += SILVER_RATIO_32);
+            }
+        }
+        return result;
+    }
+
+    /*
+     * Bounded versions of nextX methods used by streams, as well as
+     * the public nextX(origin, bound) methods.  These exist mainly to
+     * avoid the need for multiple versions of stream spliterators
+     * across the different exported forms of streams.
+     */
+
+    /**
+     * This is the form of {@link RandomGenerator#nextLong() nextLong}() used by
+     * a {@link LongStream} {@link Spliterator} and by the public method
+     * {@link RandomGenerator#nextLong(long, long) nextLong}(origin, bound). If
+     * {@code origin} is greater than or equal to {@code bound},
+     * then this method simply calls the unbounded version of
+     * {@link RandomGenerator#nextLong() nextLong}(), choosing pseudorandomly
+     * from among all 2<sup>64</sup> possible {@code long} values}, and
+     * otherwise uses one or more calls to
+     * {@link RandomGenerator#nextLong() nextLong}() to choose a value
+     * pseudorandomly from the possible values between {@code origin}
+     * (inclusive) and {@code bound} (exclusive).
+     *
+     * @implNote This method first calls {@code nextLong()} to obtain
+     * a {@code long} value that is assumed to be pseudorandomly
+     * chosen uniformly and independently from the 2<sup>64</sup>
+     * possible {@code long} values (that is, each of the 2<sup>64</sup>
+     * possible long values is equally likely to be chosen).
+     * Under some circumstances (when the specified range is not
+     * a power of 2), {@code nextLong()} may be called additional times
+     * to ensure that that the values in the specified range are
+     * equally likely to be chosen (provided the assumption holds).
+     *
+     * The implementation considers four cases:
+     * <ol>
+     *
+     * <li> If the {@code} bound} is less than or equal to the {@code origin}
+     * (indicated an unbounded form), the 64-bit {@code long} value obtained
+     * from {@link RandomGenerator#nextLong() nextLong}() is returned directly.
+     * </li>
+     *
+     * <li> Otherwise, if the length <i>n</i> of the specified range is an
+     * exact power of two 2<sup><i>m</i></sup> for some integer
+     *      <i>m</i>, then return the sum of {@code origin} and the
+     *      <i>m</i> lowest-order bits of the value from {@code nextLong()}.
+     * </li>
+     *
+     * <li> Otherwise, if the length <i>n</i> of the specified range
+     * is less than 2<sup>63</sup>, then the basic idea is to use the remainder
+     * modulo <i>n</i> of the value from
+     * {@link RandomGenerator#nextLong() nextLong}(), but with this approach
+     * some values will be over-represented. Therefore a loop is used to avoid
+     * potential bias by rejecting candidates that are too large. Assuming that
+     * the results from {@link RandomGenerator#nextLong() nextLong}() are truly
+     * chosen uniformly and independently, the expected number of iterations
+     * will be somewhere between 1 and 2, depending on the precise value of
+     * <i>n</i>.</li>
+     *
+     * <li> Otherwise, the length <i>n</i> of the specified range
+     * cannot be represented as a positive {@code long} value. A loop repeatedly
+     * calls {@link RandomGenerator#nextLong() nextLong}() until obtaining a
+     * suitable candidate, Again, the expected number of iterations is less than
+     * 2.</li>
+     *
+     * </ol>
+     *
+     * @param rng a random number generator to be used as a
+     *        source of pseudorandom {@code long} values
+     * @param origin the least value that can be produced,
+     *        unless greater than or equal to {@code bound}
+     * @param bound the upper bound (exclusive), unless {@code origin}
+     *        is greater than or equal to {@code bound}
+     *
+     * @return a pseudorandomly chosen {@code long} value,
+     *         which will be between {@code origin} (inclusive) and
+     *         {@code bound} exclusive unless {@code origin}
+     *         is greater than or equal to {@code bound}
+     */
+    public static long boundedNextLong(RandomGenerator rng, long origin, long bound) {
+        long r = rng.nextLong();
+        if (origin < bound) {
+            // It's not case (1).
+            final long n = bound - origin;
+            final long m = n - 1;
+            if ((n & m) == 0L) {
+                // It is case (2): length of range is a power of 2.
+                r = (r & m) + origin;
+            } else if (n > 0L) {
+                // It is case (3): need to reject over-represented candidates.
+                /* This loop takes an unlovable form (but it works):
+                   because the first candidate is already available,
+                   we need a break-in-the-middle construction,
+                   which is concisely but cryptically performed
+                   within the while-condition of a body-less for loop. */
+                for (long u = r >>> 1;            // ensure nonnegative
+                     u + m - (r = u % n) < 0L;    // rejection check
+                     u = rng.nextLong() >>> 1) // retry
+                    ;
+                r += origin;
+            }
+            else {
+                // It is case (4): length of range not representable as long.
+                while (r < origin || r >= bound)
+                    r = rng.nextLong();
+            }
+        }
+        return r;
+    }
+
+    /**
+     * This is the form of {@link RandomGenerator#nextLong() nextLong}() used by
+     * the public method {@link RandomGenerator#nextLong(long) nextLong}(bound).
+     * This is essentially a version of
+     * {@link RandomSupport#boundedNextLong(RandomGenerator, long, long) boundedNextLong}(rng, origin, bound)
+     * that has been specialized for the case where the {@code origin} is zero
+     * and the {@code bound} is greater than zero. The value returned is chosen
+     * pseudorandomly from nonnegative integer values less than {@code bound}.
+     *
+     * @implNote This method first calls {@code nextLong()} to obtain
+     * a {@code long} value that is assumed to be pseudorandomly
+     * chosen uniformly and independently from the 2<sup>64</sup>
+     * possible {@code long} values (that is, each of the 2<sup>64</sup>
+     * possible long values is equally likely to be chosen).
+     * Under some circumstances (when the specified range is not
+     * a power of 2), {@code nextLong()} may be called additional times
+     * to ensure that that the values in the specified range are
+     * equally likely to be chosen (provided the assumption holds).
+     *
+     * The implementation considers two cases:
+     * <ol>
+     *
+     * <li> If {@code bound} is an exact power of two 2<sup><i>m</i></sup>
+     * for some integer <i>m</i>, then return the sum of {@code origin} and the
+     * <i>m</i> lowest-order bits of the value from
+     * {@link RandomGenerator#nextLong() nextLong}().</li>
+     *
+     * <li> Otherwise, the basic idea is to use the remainder modulo
+     *      <i>bound</i> of the value from {@code nextLong()},
+     * but with this approach some values will be over-represented. Therefore a
+     * loop is used to avoid potential bias by rejecting candidates that vare
+     * too large. Assuming that the results from
+     * {@link RandomGenerator#nextLong() nextLong}() are truly chosen uniformly
+     * and independently, the expected number of iterations will be somewhere
+     * between 1 and 2, depending on the precise value of <i>bound</i>.</li>
+     *
+     * </ol>
+     *
+     * @param rng a random number generator to be used as a
+     *        source of pseudorandom {@code long} values
+     * @param bound the upper bound (exclusive); must be greater than zero
+     *
+     * @return a pseudorandomly chosen {@code long} value
+     */
+    public static long boundedNextLong(RandomGenerator rng, long bound) {
+        // Specialize boundedNextLong for origin == 0, bound > 0
+        final long m = bound - 1;
+        long r = rng.nextLong();
+        if ((bound & m) == 0L) {
+            // The bound is a power of 2.
+            r &= m;
+        } else {
+            // Must reject over-represented candidates
+            /* This loop takes an unlovable form (but it works):
+               because the first candidate is already available,
+               we need a break-in-the-middle construction,
+               which is concisely but cryptically performed
+               within the while-condition of a body-less for loop. */
+            for (long u = r >>> 1;
+                 u + m - (r = u % bound) < 0L;
+                 u = rng.nextLong() >>> 1)
+                ;
+        }
+        return r;
+    }
+
+    /**
+     * This is the form of {@link RandomGenerator#nextInt() nextInt}() used by
+     * an {@link IntStream} {@link Spliterator} and by the public method
+     * {@link RandomGenerator#nextInt(int, int) nextInt}(origin, bound). If
+     * {@code origin} is greater than or equal to {@code bound},
+     * then this method simply calls the unbounded version of
+     * {@link RandomGenerator#nextInt() nextInt}(), choosing pseudorandomly
+     * from among all 2<sup>64</sup> possible {@code int} values}, and otherwise
+     * uses one or more calls to {@link RandomGenerator#nextInt() nextInt}() to
+     * choose a value pseudorandomly from the possible values between
+     * {@code origin} (inclusive) and {@code bound} (exclusive).
+     *
+     * @param rng a random number generator to be used as a
+     *        source of pseudorandom {@code int} values
+     * @param origin the least value that can be produced,
+     *        unless greater than or equal to {@code bound}
+     * @param bound the upper bound (exclusive), unless {@code origin}
+     *        is greater than or equal to {@code bound}
+     *
+     * @return a pseudorandomly chosen {@code int} value,
+     *         which will be between {@code origin} (inclusive) and
+     *         {@code bound} exclusive unless {@code origin}
+     *         is greater than or equal to {@code bound}
+     *
+     * @implNote The implementation of this method is identical to
+     *           the implementation of {@code nextLong(origin, bound)}
+     *           except that {@code int} values and the {@code nextInt()}
+     *           method are used rather than {@code long} values and the
+     *           {@code nextLong()} method.
+     */
+    public static int boundedNextInt(RandomGenerator rng, int origin, int bound) {
+        int r = rng.nextInt();
+        if (origin < bound) {
+            // It's not case (1).
+            final int n = bound - origin;
+            final int m = n - 1;
+            if ((n & m) == 0) {
+                // It is case (2): length of range is a power of 2.
+                r = (r & m) + origin;
+            } else if (n > 0) {
+                // It is case (3): need to reject over-represented candidates.
+                for (int u = r >>> 1;
+                     u + m - (r = u % n) < 0;
+                     u = rng.nextInt() >>> 1)
+                    ;
+                r += origin;
+            }
+            else {
+                // It is case (4): length of range not representable as long.
+                while (r < origin || r >= bound) {
+                    r = rng.nextInt();
+                }
+            }
+        }
+        return r;
+    }
+
+    /**
+     * This is the form of {@link RandomGenerator#nextInt() nextInt}() used by
+     * the public method {@link RandomGenerator#nextInt(int) nextInt}(bound).
+     * This is essentially a version of
+     * {@link RandomSupport#boundedNextInt(RandomGenerator, int, int) boundedNextInt}(rng, origin, bound)
+     * that has been specialized for the case where the {@code origin} is zero
+     * and the {@code bound} is greater than zero. The value returned is chosen
+     * pseudorandomly from nonnegative integer values less than {@code bound}.
+     *
+     * @param rng a random number generator to be used as a
+     *        source of pseudorandom {@code long} values
+     * @param bound the upper bound (exclusive); must be greater than zero
+     *
+     * @return a pseudorandomly chosen {@code long} value
+     *
+     * @implNote The implementation of this method is identical to
+     *           the implementation of {@code nextLong(bound)}
+     *           except that {@code int} values and the {@code nextInt()}
+     *           method are used rather than {@code long} values and the
+     *           {@code nextLong()} method.
+     */
+    public static int boundedNextInt(RandomGenerator rng, int bound) {
+        // Specialize boundedNextInt for origin == 0, bound > 0
+        final int m = bound - 1;
+        int r = rng.nextInt();
+        if ((bound & m) == 0) {
+            // The bound is a power of 2.
+            r &= m;
+        } else {
+            // Must reject over-represented candidates
+            for (int u = r >>> 1;
+                 u + m - (r = u % bound) < 0;
+                 u = rng.nextInt() >>> 1)
+                ;
+        }
+        return r;
+    }
+
+    /**
+     * This is the form of {@link RandomGenerator#nextDouble() nextDouble}()
+     * used by a {@link DoubleStream} {@link Spliterator} and by the public
+     * method
+     * {@link RandomGenerator#nextDouble(double, double) nextDouble}(origin, bound).
+     * {@code origin} is greater than or equal to {@code bound},
+     * then this method simply calls the unbounded version of
+     * {@link RandomGenerator#nextDouble() nextDouble}(), and otherwise scales
+     * and translates the result of a call to
+     * {@link RandomGenerator#nextDouble() nextDouble}() so that it lies between
+     * {@code origin} (inclusive) and {@code bound} (exclusive).
+     *
+     * @implNote The implementation considers two cases:
+     * <ol>
+     *
+     * <li> If the {@code bound} is less than or equal to the {@code origin}
+     * (indicated an unbounded form), the 64-bit {@code double} value obtained
+     * from {@link RandomGenerator#nextDouble() nextDouble}() is returned
+     * directly.
+     *
+     * <li> Otherwise, the result of a call to {@code nextDouble} is
+     * multiplied by {@code (bound - origin)}, then {@code origin} is added, and
+     * then if this this result is not less than {@code bound} (which can
+     * sometimes occur because of rounding), it is replaced with the largest
+     * {@code double} value that is less than {@code bound}.
+     *
+     * </ol>
+     *
+     * @param rng a random number generator to be used as a
+     *        source of pseudorandom {@code double} values
+     * @param origin the least value that can be produced,
+     *        unless greater than or equal to {@code bound}; must be finite
+     * @param bound the upper bound (exclusive), unless {@code origin}
+     *        is greater than or equal to {@code bound}; must be finite
+     * @return a pseudorandomly chosen {@code double} value,
+     *         which will be between {@code origin} (inclusive) and
+     *         {@code bound} exclusive unless {@code origin}
+     *         is greater than or equal to {@code bound},
+     *         in which case it will be between 0.0 (inclusive)
+     *         and 1.0 (exclusive)
+     */
+    public static double boundedNextDouble(RandomGenerator rng, double origin, double bound) {
+        double r = rng.nextDouble();
+        if (origin < bound) {
+            if (bound - origin < Double.POSITIVE_INFINITY) {
+                r = r * (bound - origin) + origin;
+            } else {
+                /* avoids overflow at the cost of 3 more multiplications */
+                double halfOrigin = 0.5 * origin;
+                r = (r * (0.5 * bound - halfOrigin) + halfOrigin) * 2.0;
+            }
+            if (r >= bound)  // may need to correct a rounding problem
+                r = Math.nextDown(bound);
+        }
+        return r;
+    }
+
+    /**
+     * This is the form of {@link RandomGenerator#nextDouble() nextDouble}()
+     * used by the public method
+     * {@link RandomGenerator#nextDouble(double) nextDouble}(bound). This is
+     * essentially a version of
+     * {@link RandomSupport#boundedNextDouble(RandomGenerator, double, double) boundedNextDouble}(rng, origin, bound)
+     * that has been specialized for the case where the {@code origin} is zero
+     * and the {@code bound} is greater than zero.
+     *
+     * @implNote The result of a call to {@code nextDouble} is
+     *      multiplied by {@code bound}, and then if this result is
+     *      not less than {@code bound} (which can sometimes occur
+     *      because of rounding), it is replaced with the largest
+     *      {@code double} value that is less than {@code bound}.
+     *
+     * @param rng a random number generator to be used as a
+     *        source of pseudorandom {@code double} values
+     * @param bound the upper bound (exclusive); must be finite and
+     *        greater than zero
+     * @return a pseudorandomly chosen {@code double} value
+     *         between zero (inclusive) and {@code bound} (exclusive)
+     */
+    public static double boundedNextDouble(RandomGenerator rng, double bound) {
+        // Specialize boundedNextDouble for origin == 0, bound > 0
+        double r = rng.nextDouble();
+        r = r * bound;
+        if (r >= bound)  // may need to correct a rounding problem
+            r = Math.nextDown(bound);
+        return r;
+    }
+
+    /**
+     * This is the form of {@link RandomGenerator#nextFloat() nextFloat}() used
+     * by a {@link Stream<Float>} {@link Spliterator} (if there were any) and by
+     * the public method
+     * {@link RandomGenerator#nextFloat(float, float) nextFloat}(origin, bound).
+     * {@code origin} is greater than or equal to {@code bound},
+     * then this method simply calls the unbounded version of
+     * {@link RandomGenerator#nextFloat() nextFloat}(), and otherwise scales and
+     * translates the result of a call to
+     * {@link RandomGenerator#nextFloat() nextFloat}() so that it lies between
+     * {@code origin} (inclusive) and {@code bound} (exclusive).
+     *
+     * @implNote The implementation of this method is identical to
+     *     the implementation of {@code nextDouble(origin, bound)}
+     *     except that {@code float} values and the {@code nextFloat()}
+     *     method are used rather than {@code double} values and the
+     *     {@code nextDouble()} method.
+     *
+     * @param rng a random number generator to be used as a
+     *        source of pseudorandom {@code float} values
+     * @param origin the least value that can be produced,
+     *        unless greater than or equal to {@code bound}; must be finite
+     * @param bound the upper bound (exclusive), unless {@code origin}
+     *        is greater than or equal to {@code bound}; must be finite
+     * @return a pseudorandomly chosen {@code float} value,
+     *         which will be between {@code origin} (inclusive) and
+     *         {@code bound} exclusive unless {@code origin}
+     *         is greater than or equal to {@code bound},
+     *         in which case it will be between 0.0 (inclusive)
+     *         and 1.0 (exclusive)
+     */
+    public static float boundedNextFloat(RandomGenerator rng, float origin, float bound) {
+        float r = rng.nextFloat();
+        if (origin < bound) {
+            if (bound - origin < Float.POSITIVE_INFINITY) {
+                r = r * (bound - origin) + origin;
+            } else {
+                /* avoids overflow at the cost of 3 more multiplications */
+                float halfOrigin = 0.5f * origin;
+                r = (r * (0.5f * bound - halfOrigin) + halfOrigin) * 2.0f;
+            }
+            if (r >= bound) // may need to correct a rounding problem
+                r = Math.nextDown(bound);
+        }
+        return r;
+    }
+
+    /**
+     * This is the form of {@link RandomGenerator#nextFloat() nextFloat}() used
+     * by the public method
+     * {@link RandomGenerator#nextFloat(float) nextFloat}(bound). This is
+     * essentially a version of
+     * {@link RandomSupport#boundedNextFloat(RandomGenerator, float, float) boundedNextFloat}(rng, origin, bound)
+     * that has been specialized for the case where the {@code origin} is zero
+     * and the {@code bound} is greater than zero.
+     *
+     * @implNote The implementation of this method is identical to
+     *     the implementation of {@code nextDouble(bound)}
+     *     except that {@code float} values and the {@code nextFloat()}
+     *     method are used rather than {@code double} values and the
+     *     {@code nextDouble()} method.
+     *
+     * @param rng a random number generator to be used as a
+     *        source of pseudorandom {@code float} values
+     * @param bound the upper bound (exclusive); must be finite and
+     *        greater than zero
+     * @return a pseudorandomly chosen {@code float} value
+     *         between zero (inclusive) and {@code bound} (exclusive)
+     */
+    public static float boundedNextFloat(RandomGenerator rng, float bound) {
+        // Specialize boundedNextFloat for origin == 0, bound > 0
+        float r = rng.nextFloat();
+        r = r * bound;
+        if (r >= bound) // may need to correct a rounding problem
+            r = Math.nextDown(bound);
+        return r;
+    }
+
+    // The following decides which of two strategies initialSeed() will use.
+    private static boolean secureRandomSeedRequested() {
+        @SuppressWarnings("removal")
+        String pp = java.security.AccessController.doPrivileged(
+                new sun.security.action.GetPropertyAction(
+                        "java.util.secureRandomSeed"));
+        return (pp != null && pp.equalsIgnoreCase("true"));
+    }
+
+    private static final boolean useSecureRandomSeed = secureRandomSeedRequested();
+
+    /**
+     * Returns a {@code long} value (chosen from some machine-dependent entropy
+     * source) that may be useful for initializing a source of seed values for
+     * instances of {@link RandomGenerator} created by zero-argument
+     * constructors. (This method should
+     * <i>not</i> be called repeatedly, once per constructed
+     * object; at most it should be called once per class.)
+     *
+     * @return a {@code long} value, randomly chosen using
+     *         appropriate environmental entropy
+     */
+    public static long initialSeed() {
+        if (useSecureRandomSeed) {
+            byte[] seedBytes = java.security.SecureRandom.getSeed(8);
+            long s = (long)(seedBytes[0]) & 0xffL;
+            for (int i = 1; i < 8; ++i)
+                s = (s << 8) | ((long)(seedBytes[i]) & 0xffL);
+            return s;
+        }
+        return (mixStafford13(System.currentTimeMillis()) ^
+                mixStafford13(System.nanoTime()));
+    }
+
+    /**
+     * The first 32 bits of the golden ratio (1+sqrt(5))/2, forced to be odd.
+     * Useful for producing good Weyl sequences or as an arbitrary nonzero odd
+     * value.
+     */
+    public static final int  GOLDEN_RATIO_32 = 0x9e3779b9;
+
+    /**
+     * The first 64 bits of the golden ratio (1+sqrt(5))/2, forced to be odd.
+     * Useful for producing good Weyl sequences or as an arbitrary nonzero odd
+     * value.
+     */
+    public static final long GOLDEN_RATIO_64 = 0x9e3779b97f4a7c15L;
+
+    /**
+     * The first 32 bits of the silver ratio 1+sqrt(2), forced to be odd. Useful
+     * for producing good Weyl sequences or as an arbitrary nonzero odd value.
+     */
+    public static final int  SILVER_RATIO_32 = 0x6A09E667;
+
+    /**
+     * The first 64 bits of the silver ratio 1+sqrt(2), forced to be odd. Useful
+     * for producing good Weyl sequences or as an arbitrary nonzero odd value.
+     */
+    public static final long SILVER_RATIO_64 = 0x6A09E667F3BCC909L;
+
+    /**
+     * Computes the 64-bit mixing function for MurmurHash3. This is a 64-bit
+     * hashing function with excellent avalanche statistics.
+     * https://github.com/aappleby/smhasher/wiki/MurmurHash3
+     *
+     * <p> Note that if the argument {@code z} is 0, the result is 0.
+     *
+     * @param z any long value
+     *
+     * @return the result of hashing z
+     */
+    public static long mixMurmur64(long z) {
+        z = (z ^ (z >>> 33)) * 0xff51afd7ed558ccdL;
+        z = (z ^ (z >>> 33)) * 0xc4ceb9fe1a85ec53L;
+        return z ^ (z >>> 33);
+    }
+
+    /**
+     * Computes Stafford variant 13 of the 64-bit mixing function for
+     * MurmurHash3. This is a 64-bit hashing function with excellent avalanche
+     * statistics.
+     * http://zimbry.blogspot.com/2011/09/better-bit-mixing-improving-on.html
+     *
+     * <p> Note that if the argument {@code z} is 0, the result is 0.
+     *
+     * @param z any long value
+     *
+     * @return the result of hashing z
+     */
+    public static long mixStafford13(long z) {
+        z = (z ^ (z >>> 30)) * 0xbf58476d1ce4e5b9L;
+        z = (z ^ (z >>> 27)) * 0x94d049bb133111ebL;
+        return z ^ (z >>> 31);
+    }
+
+    /**
+     * Computes Doug Lea's 64-bit mixing function. This is a 64-bit hashing
+     * function with excellent avalanche statistics. It has the advantages of
+     * using the same multiplicative constant twice and of using only 32-bit
+     * shifts.
+     *
+     * <p> Note that if the argument {@code z} is 0, the result is 0.
+     *
+     * @param z any long value
+     *
+     * @return the result of hashing z
+     */
+    public static long mixLea64(long z) {
+        z = (z ^ (z >>> 32)) * 0xdaba0b6eb09322e3L;
+        z = (z ^ (z >>> 32)) * 0xdaba0b6eb09322e3L;
+        return z ^ (z >>> 32);
+    }
+
+    /**
+     * Computes the 32-bit mixing function for MurmurHash3. This is a 32-bit
+     * hashing function with excellent avalanche statistics.
+     * https://github.com/aappleby/smhasher/wiki/MurmurHash3
+     *
+     * <p> Note that if the argument {@code z} is 0, the result is 0.
+     *
+     * @param z any long value
+     *
+     * @return the result of hashing z
+     */
+    public static int mixMurmur32(int z) {
+        z = (z ^ (z >>> 16)) * 0x85ebca6b;
+        z = (z ^ (z >>> 13)) * 0xc2b2ae35;
+        return z ^ (z >>> 16);
+    }
+
+    /**
+     * Computes Doug Lea's 32-bit mixing function. This is a 32-bit hashing
+     * function with excellent avalanche statistics. It has the advantages of
+     * using the same multiplicative constant twice and of using only 16-bit
+     * shifts.
+     *
+     * <p> Note that if the argument {@code z} is 0, the result is 0.
+     *
+     * @param z any long value
+     *
+     * @return the result of hashing z
+     */
+    public static int mixLea32(int z) {
+        z = (z ^ (z >>> 16)) * 0xd36d884b;
+        z = (z ^ (z >>> 16)) * 0xd36d884b;
+        return z ^ (z >>> 16);
+    }
+
+    // Non-public (package only) support for spliterators needed by AbstractSplittableGenerator
+    // and AbstractArbitrarilyJumpableGenerator and AbstractSharedGenerator
+
+    /**
+     * Base class for making Spliterator classes for streams of randomly chosen
+     * values.
+     */
+    public abstract static class RandomSpliterator {
+
+        /** low range value */
+       public long index;
+
+       /** high range value */
+       public final long fence;
+
+       /** Constructor
+        *
+        * @param index  low range value
+        * @param fence  high range value
+        */
+        public RandomSpliterator(long index, long fence) {
+            this.index = index; this.fence = fence;
+        }
+
+        /**
+         * Returns estimated size.
+         *
+         * @return estimated size
+         */
+        public long estimateSize() {
+            return fence - index;
+        }
+
+        /**
+         * Returns characteristics.
+         *
+         * @return characteristics
+         */
+        public int characteristics() {
+            return (Spliterator.SIZED | Spliterator.SUBSIZED |
+                    Spliterator.NONNULL | Spliterator.IMMUTABLE);
+        }
+    }
+
+    /**
+     * Spliterators for int streams. These are based on abstract spliterator
+     * classes provided by class AbstractSpliteratorGenerator. Each one needs to
+     * define only a constructor and two methods.
+     */
+    public static class RandomIntsSpliterator extends RandomSupport.RandomSpliterator
+            implements Spliterator.OfInt {
+        final RandomGenerator generatingGenerator;
+        final int origin;
+        final int bound;
+
+        /**
+         * RandomIntsSpliterator constructor.
+         *
+         * @param generatingGenerator base AbstractSpliteratorGenerator
+         * @param index the (inclusive) lower bound on traversal positions
+         * @param fence the (exclusive) upper bound on traversal positions
+         * @param origin the (inclusive) lower bound on the pseudorandom values to be generated
+         * @param bound the (exclusive) upper bound on the pseudorandom values to be generated
+         */
+        public RandomIntsSpliterator(RandomGenerator generatingGenerator,
+                                     long index, long fence, int origin, int bound) {
+            super(index, fence);
+            this.generatingGenerator = generatingGenerator;
+            this.origin = origin; this.bound = bound;
+        }
+
+        public Spliterator.OfInt trySplit() {
+            long i = index, m = (i + fence) >>> 1;
+            if (m <= i) return null;
+            index = m;
+            // The same generatingGenerator is used, with no splitting or copying.
+            return new RandomIntsSpliterator(generatingGenerator, i, m, origin, bound);
+        }
+
+        public boolean tryAdvance(IntConsumer consumer) {
+            Objects.requireNonNull(consumer);
+            long i = index, f = fence;
+            if (i < f) {
+                consumer.accept(RandomSupport.boundedNextInt(generatingGenerator, origin, bound));
+                index = i + 1;
+                return true;
+            }
+            else return false;
+        }
+
+        public void forEachRemaining(IntConsumer consumer) {
+            Objects.requireNonNull(consumer);
+            long i = index, f = fence;
+            if (i < f) {
+                index = f;
+                RandomGenerator r = generatingGenerator;
+                int o = origin, b = bound;
+                do {
+                    consumer.accept(RandomSupport.boundedNextInt(r, o, b));
+                } while (++i < f);
+            }
+        }
+    }
+
+    /**
+     * Spliterator for long streams.
+     */
+    public static class RandomLongsSpliterator extends RandomSupport.RandomSpliterator
+            implements Spliterator.OfLong {
+        final RandomGenerator generatingGenerator;
+        final long origin;
+        final long bound;
+
+        /**
+         * RandomLongsSpliterator constructor.
+         *
+         * @param generatingGenerator base AbstractSpliteratorGenerator
+         * @param index the (inclusive) lower bound on traversal positions
+         * @param fence the (exclusive) upper bound on traversal positions
+         * @param origin the (inclusive) lower bound on the pseudorandom values to be generated
+         * @param bound the (exclusive) upper bound on the pseudorandom values to be generated
+         */
+        public RandomLongsSpliterator(RandomGenerator generatingGenerator,
+                                      long index, long fence, long origin, long bound) {
+            super(index, fence);
+            this.generatingGenerator = generatingGenerator;
+            this.origin = origin; this.bound = bound;
+        }
+
+        public Spliterator.OfLong trySplit() {
+            long i = index, m = (i + fence) >>> 1;
+            if (m <= i) return null;
+            index = m;
+            // The same generatingGenerator is used, with no splitting or copying.
+            return new RandomLongsSpliterator(generatingGenerator, i, m, origin, bound);
+        }
+
+        public boolean tryAdvance(LongConsumer consumer) {
+            Objects.requireNonNull(consumer);
+            long i = index, f = fence;
+            if (i < f) {
+                consumer.accept(RandomSupport.boundedNextLong(generatingGenerator, origin, bound));
+                index = i + 1;
+                return true;
+            }
+            else return false;
+        }
+
+        public void forEachRemaining(LongConsumer consumer) {
+            Objects.requireNonNull(consumer);
+            long i = index, f = fence;
+            if (i < f) {
+                index = f;
+                RandomGenerator r = generatingGenerator;
+                long o = origin, b = bound;
+                do {
+                    consumer.accept(RandomSupport.boundedNextLong(r, o, b));
+                } while (++i < f);
+            }
+        }
+    }
+
+    /**
+     * Spliterator for double streams.
+     */
+    public static class RandomDoublesSpliterator extends RandomSupport.RandomSpliterator
+            implements Spliterator.OfDouble {
+        final RandomGenerator generatingGenerator;
+        final double origin;
+        final double bound;
+
+        /**
+         * RandomDoublesSpliterator constructor.
+         *
+         * @param generatingGenerator base AbstractSpliteratorGenerator
+         * @param index the (inclusive) lower bound on traversal positions
+         * @param fence the (exclusive) upper bound on traversal positions
+         * @param origin the (inclusive) lower bound on the pseudorandom values to be generated
+         * @param bound the (exclusive) upper bound on the pseudorandom values to be generated
+         */
+        public RandomDoublesSpliterator(RandomGenerator generatingGenerator,
+                                        long index, long fence, double origin, double bound) {
+            super(index, fence);
+            this.generatingGenerator = generatingGenerator;
+            this.origin = origin; this.bound = bound;
+        }
+
+        public Spliterator.OfDouble trySplit() {
+            long i = index, m = (i + fence) >>> 1;
+            if (m <= i) return null;
+            index = m;
+            // The same generatingGenerator is used, with no splitting or copying.
+            return new RandomDoublesSpliterator(generatingGenerator, i, m, origin, bound);
+        }
+
+        public boolean tryAdvance(DoubleConsumer consumer) {
+            Objects.requireNonNull(consumer);
+            long i = index, f = fence;
+            if (i < f) {
+                consumer.accept(RandomSupport.boundedNextDouble(generatingGenerator, origin, bound));
+                index = i + 1;
+                return true;
+            }
+            else return false;
+        }
+
+        public void forEachRemaining(DoubleConsumer consumer) {
+            Objects.requireNonNull(consumer);
+            long i = index, f = fence;
+            if (i < f) {
+                index = f;
+                RandomGenerator r = generatingGenerator;
+                double o = origin, b = bound;
+                do {
+                    consumer.accept(RandomSupport.boundedNextDouble(r, o, b));
+                } while (++i < f);
+            }
+        }
+    }
+
+    /**
+     * Largest value that {@link #computeNextExponential} can ever return.
+     */
+    private static final double MAX_EXPONENTIAL = 0x1.0p63 * DoubleZigguratTables.exponentialX0;
+
+    /**
+     * Implementation support for the {@code nextExponential} method of
+     * {@link java.util.random.RandomGenerator}.
+     *
+     * @param rng an instance of {@code RandomGenerator}, used to generate uniformly
+     *            pseudorandomly chosen {@code long} values
+     *
+     * @return a nonnegative {@code double} value chosen pseudorandomly
+     *         from an exponential distribution whose mean is 1
+     */
+    public static double computeNextExponential(RandomGenerator rng) {
+        return computeNextExponentialSoftCapped(rng, MAX_EXPONENTIAL);
+    }
+
+    /**
+     * Generates a pseudorandom value {@code x} such that {@code Math.min(x, maxValue)}
+     * follows the same distribution as it would if {@code x} was exponentially distributed
+     * with mean 1, but with a worst-case number of calls to {@link
+     * RandomGenerator#nextLong()} that's linear with {@code maxValue}. {@code maxValue} is
+     * a "soft" cap in that a value larger than {@code maxValue} may be returned in order
+     * to save a calculation.
+     *
+     * Certain details of the algorithm used in this method may depend critically
+     * on the quality of the low-order bits delivered by {@code nextLong()}.  This method
+     * should not be used with RNG algorithms (such as a simple Linear Congruential
+     * Generator) whose low-order output bits do not have good statistical quality.
+     *
+     * @implNote The reference implementation uses McFarland's fast modified
+     * ziggurat algorithm (largely table-driven, with rare cases handled by
+     * computation and rejection sampling). Walker's alias method for sampling
+     * a discrete distribution also plays a role.
+     *
+     * @param rng an instance of {@code RandomGenerator}, used to generate uniformly
+     *            pseudorandomly chosen {@code long} values
+     *
+     * @return a nonnegative {@code double} value chosen pseudorandomly
+     *         from an exponential distribution whose mean is 1
+     */
+    public static double computeNextExponentialSoftCapped(RandomGenerator rng, double maxValue) {
+        /*
+         * The tables themselves, as well as a number of associated parameters, are
+         * defined in class DoubleZigguratTables, which is automatically
+         * generated by the program create_ziggurat_tables.c (which takes only a
+         * few seconds to run).
+         *
+         * For more information about the algorithm, see these articles:
+         *
+         * Christopher D. McFarland.  2016 (published online 24 Jun 2015).  A modified ziggurat
+         * algorithm for generating exponentially and normally distributed pseudorandom numbers.
+         * Journal of Statistical Computation and Simulation 86 (7), pages 1281-1294.
+         * https://www.tandfonline.com/doi/abs/10.1080/00949655.2015.1060234
+         * Also at https://arxiv.org/abs/1403.6870 (26 March 2014).
+         *
+         * Alastair J. Walker.  1977.  An efficient method for generating discrete random
+         * variables with general distributions. ACM Trans. Math. Software 3, 3
+         * (September 1977), 253-256. DOI: https://doi.org/10.1145/355744.355749
+         *
+         */
+        long U1 = rng.nextLong();
+        // Experimentation on a variety of machines indicates that it is overall much faster
+        // to do the following & and < operations on longs rather than first cast U1 to int
+        // (but then we need to cast to int before doing the array indexing operation).
+        long i = U1 & DoubleZigguratTables.exponentialLayerMask;
+        if (i < DoubleZigguratTables.exponentialNumberOfLayers) {
+            // This is the fast path (occurring more than 98% of the time).  Make an early exit.
+            return DoubleZigguratTables.exponentialX[(int)i] * (U1 >>> 1);
+        }
+        // We didn't use the upper part of U1 after all.  We'll probably be able to use it later.
+        if (maxValue <= 0.0) {
+            return 0.0;
+        }
+        final long maxExtraMinus1;
+        if (maxValue >= MAX_EXPONENTIAL) {
+            maxExtraMinus1 = Long.MAX_VALUE;
+        } else {
+            // Conversion to long rounds toward zero
+            maxExtraMinus1 = (long) (maxValue / DoubleZigguratTables.exponentialX0);
+        }
+        for (long extra = 0; ; ) {
+            // Use Walker's alias method to sample an (unsigned) integer j from a discrete
+            // probability distribution that includes the tail and all the ziggurat overhangs;
+            // j will be less than DoubleZigguratTables.exponentialNumberOfLayers + 1.
+            long UA = rng.nextLong();
+            int j = (int)UA & DoubleZigguratTables.exponentialAliasMask;
+            if (UA >= DoubleZigguratTables.exponentialAliasThreshold[j]) {
+                j = DoubleZigguratTables.exponentialAliasMap[j] &
+                        DoubleZigguratTables.exponentialSignCorrectionMask;
+            }
+            if (j > 0) {   // Sample overhang j
+                // For the exponential distribution, every overhang is convex.
+                final double[] X = DoubleZigguratTables.exponentialX;
+                final double[] Y = DoubleZigguratTables.exponentialY;
+                // At this point, the high-order bits of U1 have not been used yet,
+                // but we need the value in U1 to be positive.
+                for (U1 = (U1 >>> 1);; U1 = (rng.nextLong() >>> 1)) {
+                    long U2 = (rng.nextLong() >>> 1);
+                    // Does the point lie below the curve?
+                    long Udiff = U2 - U1;
+                    if (Udiff < 0) {
+                        // We picked a point in the upper-right triangle.  None of those can be
+                        // accepted.  So remap the point into the lower-left triangle and try that.
+                        // In effect, we swap U1 and U2, and invert the sign of Udiff.
+                        Udiff = -Udiff;
+                        U2 = U1;
+                        U1 -= Udiff;
+                    }
+                    // Compute the actual x-coordinate of the randomly chosen point.
+                    double x = (X[j] * 0x1.0p63) + ((X[j-1] - X[j]) * (double)U1);
+                    if (Udiff >= DoubleZigguratTables.exponentialConvexMargin) {
+                        return Math.fma(extra, DoubleZigguratTables.exponentialX0, x);   // The chosen point is way below the curve; accept it.
+                    }
+                    // Compute the actual y-coordinate of the randomly chosen point.
+                    double y = (Y[j] * 0x1.0p63) + ((Y[j-1] - Y[j]) * (double)U2);
+                    // Now see how that y-coordinate compares to the curve
+                    if (y <= Math.exp(-x)) {
+                        return Math.fma(extra, DoubleZigguratTables.exponentialX0, x);   // The chosen point is below the curve; accept it.
+                    }
+                    // Otherwise, we reject this sample and have to try again.
+                }
+            }
+            if (extra == maxExtraMinus1) {
+                // We've reached the maximum, so don't waste any more time
+                return maxValue;
+            }
+            // We are now committed to sampling from the tail.  We could do a recursive call
+            // and then add X[0], but we save some time and stack space by using an iterative loop.
+            extra++;
+            // This is like the first five lines of this method, but if it returns, it first adds "extra" times X0.
+            U1 = rng.nextLong();
+            i = U1 & DoubleZigguratTables.exponentialLayerMask;
+            if (i < DoubleZigguratTables.exponentialNumberOfLayers) {
+                return Math.fma(extra, DoubleZigguratTables.exponentialX0, DoubleZigguratTables.exponentialX[(int)i] * (U1 >>> 1));
+            }
+        }
+    }
+
+    /**
+     * Implementation support for the {@code nextGaussian} methods of
+     * {@link java.util.random.RandomGenerator}.
+     *
+     * Certain details of the algorithm used in this method may depend critically
+     * on the quality of the low-order bits delivered by {@code nextLong()}.  This method
+     * should not be used with RNG algorithms (such as a simple Linear Congruential
+     * Generator) whose low-order output bits do not have good statistical quality.
+     *
+     * @implNote The reference implementation uses McFarland's fast modified
+     * ziggurat algorithm (largely table-driven, with rare cases handled by
+     * computation and rejection sampling). Walker's alias method for sampling
+     * a discrete distribution also plays a role.
+     *
+     * @param rng an instance of {@code RandomGenerator}, used to generate uniformly
+     *            pseudorandomly chosen {@code long} values
+     *
+     * @return a nonnegative {@code double} value chosen pseudorandomly
+     *         from a Gaussian (normal) distribution whose mean is 0 and whose
+     *         standard deviation is 1.
+     */
+    public static double computeNextGaussian(RandomGenerator rng) {
+        /*
+         * The tables themselves, as well as a number of associated parameters, are
+         * defined in class java.util.DoubleZigguratTables, which is automatically
+         * generated by the program create_ziggurat_tables.c (which takes only a
+         * few seconds to run).
+         *
+         * For more information about the algorithm, see these articles:
+         *
+         * Christopher D. McFarland.  2016 (published online 24 Jun 2015).  A modified ziggurat
+         * algorithm for generating exponentially and normally distributed pseudorandom numbers.
+         * Journal of Statistical Computation and Simulation 86 (7), pages 1281-1294.
+         * https://www.tandfonline.com/doi/abs/10.1080/00949655.2015.1060234
+         * Also at https://arxiv.org/abs/1403.6870 (26 March 2014).
+         *
+         * Alastair J. Walker.  1977.  An efficient method for generating discrete random
+         * variables with general distributions. ACM Trans. Math. Software 3, 3
+         * (September 1977), 253-256. DOI: https://doi.org/10.1145/355744.355749
+         *
+         */
+        long U1 = rng.nextLong();
+        // Experimentation on a variety of machines indicates that it is overall much faster
+        // to do the following & and < operations on longs rather than first cast U1 to int
+        // (but then we need to cast to int before doing the array indexing operation).
+        long i = U1 & DoubleZigguratTables.normalLayerMask;
+
+        if (i < DoubleZigguratTables.normalNumberOfLayers) {
+            // This is the fast path (occurring more than 98% of the time).  Make an early exit.
+            return DoubleZigguratTables.normalX[(int)i] * U1;   // Note that the sign bit of U1 is used here.
+        }
+        // We didn't use the upper part of U1 after all.
+        // Pull U1 apart into a sign bit and a 63-bit value for later use.
+        double signBit = (U1 >= 0) ? 1.0 : -1.0;
+        U1 = (U1 << 1) >>> 1;
+
+        // Use Walker's alias method to sample an (unsigned) integer j from a discrete
+        // probability distribution that includes the tail and all the ziggurat overhangs;
+        // j will be less than DoubleZigguratTables.normalNumberOfLayers + 1.
+        long UA = rng.nextLong();
+        int j = (int)UA & DoubleZigguratTables.normalAliasMask;
+        if (UA >= DoubleZigguratTables.normalAliasThreshold[j]) {
+            j = DoubleZigguratTables.normalAliasMap[j] & DoubleZigguratTables.normalSignCorrectionMask;
+        }
+
+        double x;
+        // Now the goal is to choose the result, which will be multiplied by signBit just before return.
+
+        // There are four kinds of overhangs:
+        //
+        //  j == 0                          :  Sample from tail
+        //  0 < j < normalInflectionIndex   :  Overhang is convex; can reject upper-right triangle
+        //  j == normalInflectionIndex      :  Overhang includes the inflection point
+        //  j > normalInflectionIndex       :  Overhang is concave; can accept point in lower-left triangle
+        //
+        // Choose one of four loops to compute x, each specialized for a specific kind of overhang.
+        // Conditional statements are arranged such that the more likely outcomes are first.
+
+        // In the three cases other than the tail case:
+        // U1 represents a fraction (scaled by 2**63) of the width of rectangle measured from the left.
+        // U2 represents a fraction (scaled by 2**63) of the height of rectangle measured from the top.
+        // Together they indicate a randomly chosen point within the rectangle.
+
+        final double[] X = DoubleZigguratTables.normalX;
+        final double[] Y = DoubleZigguratTables.normalY;
+        if (j > DoubleZigguratTables.normalInflectionIndex) {   // Concave overhang
+            for (;; U1 = (rng.nextLong() >>> 1)) {
+                long U2 = (rng.nextLong() >>> 1);
+                // Compute the actual x-coordinate of the randomly chosen point.
+                x = (X[j] * 0x1.0p63) + ((X[j-1] - X[j]) * (double)U1);
+                // Does the point lie below the curve?
+                long Udiff = U2 - U1;
+                if (Udiff >= 0) {
+                    break;   // The chosen point is in the lower-left triangle; accept it.
+                }
+                if (Udiff <= -DoubleZigguratTables.normalConcaveMargin) {
+                    continue;   // The chosen point is way above the curve; reject it.
+                }
+                // Compute the actual y-coordinate of the randomly chosen point.
+                double y = (Y[j] * 0x1.0p63) + ((Y[j-1] - Y[j]) * (double)U2);
+                // Now see how that y-coordinate compares to the curve
+                if (y <= Math.exp(-0.5*x*x)) {
+                    break;   // The chosen point is below the curve; accept it.
+                }
+                // Otherwise, we reject this sample and have to try again.
+            }
+        } else if (j == 0) {   // Tail
+            // Tail-sampling method of Marsaglia and Tsang.  See any one of:
+            // Marsaglia and Tsang. 1984. A fast, easily implemented method for sampling from decreasing
+            //    or symmetric unimodal density functions. SIAM J. Sci. Stat. Comput. 5, 349-359.
+            // Marsaglia and Tsang. 1998. The Monty Python method for generating random variables.
+            //    ACM Trans. Math. Softw. 24, 3 (September 1998), 341-350.  See page 342, step (4).
+            //    http://doi.org/10.1145/292395.292453
+            // Thomas, Luk, Leong, and Villasenor. 2007. Gaussian random number generators.
+            //    ACM Comput. Surv. 39, 4, Article 11 (November 2007).  See Algorithm 16.
+            //    http://doi.org/10.1145/1287620.1287622
+            // Compute two separate random exponential samples and then compare them in certain way.
+            double limit;
+            do {
+                x = (1.0 / DoubleZigguratTables.normalX0) * computeNextExponential(rng);
+                limit = 0.5*x*x;
+            } while (computeNextExponentialSoftCapped(rng, limit) < limit);
+            x += DoubleZigguratTables.normalX0;
+        } else if (j < DoubleZigguratTables.normalInflectionIndex) {   // Convex overhang
+            for (;; U1 = (rng.nextLong() >>> 1)) {
+                long U2 = (rng.nextLong() >>> 1);
+                // Does the point lie below the curve?
+                long Udiff = U2 - U1;
+                if (Udiff < 0) {
+                    // We picked a point in the upper-right triangle.  None of those can be accepted.
+                    // So remap the point into the lower-left triangle and try that.
+                    // In effect, we swap U1 and U2, and invert the sign of Udiff.
+                    Udiff = -Udiff;
+                    U2 = U1;
+                    U1 -= Udiff;
+                }
+                // Compute the actual x-coordinate of the randomly chosen point.
+                x = (X[j] * 0x1.0p63) + ((X[j-1] - X[j]) * (double)U1);
+                if (Udiff >= DoubleZigguratTables.normalConvexMargin) {
+                    break;   // The chosen point is way below the curve; accept it.
+                }
+                // Compute the actual y-coordinate of the randomly chosen point.
+                double y = (Y[j] * 0x1.0p63) + ((Y[j-1] - Y[j]) * (double)U2);
+                // Now see how that y-coordinate compares to the curve
+                if (y <= Math.exp(-0.5*x*x)) break; // The chosen point is below the curve; accept it.
+                // Otherwise, we reject this sample and have to try again.
+            }
+        } else {
+            // The overhang includes the inflection point, so the curve is both convex and concave
+            for (;; U1 = (rng.nextLong() >>> 1)) {
+                long U2 = (rng.nextLong() >>> 1);
+                // Compute the actual x-coordinate of the randomly chosen point.
+                x = Math.fma(X[j-1] - X[j], (double)U1, X[j] * 0x1.0p63);
+                // Does the point lie below the curve?
+                long Udiff = U2 - U1;
+                if (Udiff >= DoubleZigguratTables.normalConvexMargin) {
+                    break;   // The chosen point is way below the curve; accept it.
+                }
+                if (Udiff <= -DoubleZigguratTables.normalConcaveMargin) {
+                    continue;   // The chosen point is way above the curve; reject it.
+                }
+                // Compute the actual y-coordinate of the randomly chosen point.
+                double y = Math.fma(Y[j-1] - Y[j], (double)U2, Y[j] * 0x1.0p63);
+                // Now see how that y-coordinate compares to the curve
+                if (y <= Math.exp(-0.5*x*x)) {
+                    break;   // The chosen point is below the curve; accept it.
+                }
+                // Otherwise, we reject this sample and have to try again.
+            }
+        }
+        return signBit*x;
+    }
+
+    /**
+     * This class overrides the stream-producing methods (such as
+     * {@link RandomGenerator#ints() ints}()) in class {@link RandomGenerator}
+     * to provide {@link Spliterator}-based implementations that support
+     * potentially parallel execution.
+     *
+     * <p> To implement a pseudorandom number generator, the programmer needs
+     * only to extend this class and provide implementations for the methods
+     * {@link RandomGenerator#nextInt() nextInt}(),
+     * {@link RandomGenerator#nextLong() nextLong}(),
+     *
+     * <p> This class is not public; it provides shared code to the public
+     * classes {@link AbstractSplittableGenerator}, and
+     * {@link AbstractArbitrarilyJumpableGenerator}.
+     *
+     * @since 17
+     */
+    public abstract static class AbstractSpliteratorGenerator implements RandomGenerator {
+        /*
+         * Implementation Overview.
+         *
+         * This class provides most of the "user API" methods needed to
+         * satisfy the interface RandomGenerator.  An implementation of this
+         * interface need only extend this class and provide implementations
+         * of six methods: nextInt, nextLong, and nextDouble (the versions
+         * that take no arguments).
+         *
+         * File organization: First the non-public abstract methods needed
+         * to create spliterators, then the main public methods.
+         */
+
+        // stream methods, coded in a way intended to better isolate for
+        // maintenance purposes the small differences across forms.
+
+        private static IntStream intStream(Spliterator.OfInt srng) {
+            return StreamSupport.intStream(srng, false);
+        }
+
+        private static LongStream longStream(Spliterator.OfLong srng) {
+            return StreamSupport.longStream(srng, false);
+        }
+
+        private static DoubleStream doubleStream(Spliterator.OfDouble srng) {
+            return StreamSupport.doubleStream(srng, false);
+        }
+
+        /* ---------------- public static methods ---------------- */
+
+       public static IntStream ints(RandomGenerator gen, long streamSize) {
+            RandomSupport.checkStreamSize(streamSize);
+            return intStream(new RandomIntsSpliterator(gen, 0L, streamSize, Integer.MAX_VALUE, 0));
+        }
+
+        public static IntStream ints(RandomGenerator gen) {
+            return intStream(new RandomIntsSpliterator(gen, 0L, Long.MAX_VALUE, Integer.MAX_VALUE, 0));
+        }
+
+        public static IntStream ints(RandomGenerator gen, long streamSize, int randomNumberOrigin, int randomNumberBound) {
+            RandomSupport.checkStreamSize(streamSize);
+            RandomSupport.checkRange(randomNumberOrigin, randomNumberBound);
+            return intStream(new RandomIntsSpliterator(gen, 0L, streamSize, randomNumberOrigin, randomNumberBound));
+        }
+
+        public static IntStream ints(RandomGenerator gen, int randomNumberOrigin, int randomNumberBound) {
+            RandomSupport.checkRange(randomNumberOrigin, randomNumberBound);
+            return intStream(new RandomIntsSpliterator(gen, 0L, Long.MAX_VALUE, randomNumberOrigin, randomNumberBound));
+        }
+
+        public static LongStream longs(RandomGenerator gen, long streamSize) {
+            RandomSupport.checkStreamSize(streamSize);
+            return longStream(new RandomLongsSpliterator(gen, 0L, streamSize, Long.MAX_VALUE, 0L));
+        }
+
+        public static LongStream longs(RandomGenerator gen) {
+            return longStream(new RandomLongsSpliterator(gen, 0L, Long.MAX_VALUE, Long.MAX_VALUE, 0L));
+        }
+
+        public static LongStream longs(RandomGenerator gen, long streamSize, long randomNumberOrigin, long randomNumberBound) {
+            RandomSupport.checkStreamSize(streamSize);
+            RandomSupport.checkRange(randomNumberOrigin, randomNumberBound);
+            return longStream(new RandomLongsSpliterator(gen, 0L, streamSize, randomNumberOrigin, randomNumberBound));
+        }
+
+        public static LongStream longs(RandomGenerator gen, long randomNumberOrigin, long randomNumberBound) {
+            RandomSupport.checkRange(randomNumberOrigin, randomNumberBound);
+            return longStream(new RandomLongsSpliterator(gen, 0L, Long.MAX_VALUE, randomNumberOrigin, randomNumberBound));
+        }
+
+        public static DoubleStream doubles(RandomGenerator gen, long streamSize) {
+            RandomSupport.checkStreamSize(streamSize);
+            return doubleStream(new RandomDoublesSpliterator(gen, 0L, streamSize, Double.MAX_VALUE, 0.0));
+        }
+
+        public static DoubleStream doubles(RandomGenerator gen) {
+            return doubleStream(new RandomDoublesSpliterator(gen, 0L, Long.MAX_VALUE, Double.MAX_VALUE, 0.0));
+        }
+
+        public static DoubleStream doubles(RandomGenerator gen, long streamSize, double randomNumberOrigin, double randomNumberBound) {
+            RandomSupport.checkStreamSize(streamSize);
+            RandomSupport.checkRange(randomNumberOrigin, randomNumberBound);
+            return doubleStream(new RandomDoublesSpliterator(gen, 0L, streamSize, randomNumberOrigin, randomNumberBound));
+        }
+
+        public static DoubleStream doubles(RandomGenerator gen, double randomNumberOrigin, double randomNumberBound) {
+            RandomSupport.checkRange(randomNumberOrigin, randomNumberBound);
+            return doubleStream(new RandomDoublesSpliterator(gen, 0L, Long.MAX_VALUE, randomNumberOrigin, randomNumberBound));
+        }
+
+        /* ---------------- public instance methods ---------------- */
+
+        public IntStream ints(long streamSize) {
+            return ints(this, streamSize);
+        }
+
+        public IntStream ints() {
+            return ints(this);
+        }
+
+        public IntStream ints(long streamSize, int randomNumberOrigin, int randomNumberBound) {
+            return ints(this, streamSize, randomNumberOrigin, randomNumberBound);
+        }
+
+        public IntStream ints(int randomNumberOrigin, int randomNumberBound) {
+            return ints(this, randomNumberOrigin, randomNumberBound);
+        }
+
+        public LongStream longs(long streamSize) {
+            return longs(this, streamSize);
+        }
+
+        public LongStream longs() {
+            return longs(this);
+        }
+
+        public LongStream longs(long streamSize, long randomNumberOrigin,long randomNumberBound) {
+            return longs(this, streamSize, randomNumberOrigin, randomNumberBound);
+        }
+
+        public LongStream longs(long randomNumberOrigin, long randomNumberBound) {
+            return longs(this, randomNumberOrigin, randomNumberBound);
+        }
+
+        public DoubleStream doubles(long streamSize) {
+            return doubles(this, streamSize);
+        }
+
+        public DoubleStream doubles() {
+            return doubles(this);
+        }
+
+        public DoubleStream doubles(long streamSize, double randomNumberOrigin, double randomNumberBound) {
+            return doubles(this, streamSize, randomNumberOrigin, randomNumberBound);
+        }
+
+        public DoubleStream doubles(double randomNumberOrigin, double randomNumberBound) {
+            return doubles(this, randomNumberOrigin, randomNumberBound);
+        }
+
+    }
+
+    /**
+     * This class provides much of the implementation of the
+     * {@link ArbitrarilyJumpableGenerator} interface, to minimize the effort
+     * required to implement that interface.
+     *
+     * <p> To implement a pseudorandom number generator, the programmer needs
+     * only to extend this class and provide implementations for the methods
+     * {@link RandomGenerator#nextInt() nextInt}(),
+     * {@link RandomGenerator#nextLong() nextLong}(),
+     * {@link ArbitrarilyJumpableGenerator#copy() copy}(),
+     * {@link JumpableGenerator#jumps(long) jumps}(long),
+     * {@link ArbitrarilyJumpableGenerator#jumpPowerOfTwo(int) jumpPowerOfTwo}(logDistance),
+     * {@link JumpableGenerator#jumpDistance() jumpDistance}(),
+     * and
+     * {@link LeapableGenerator#leapDistance() leapDistance}().
+     *
+     * <p> (If the pseudorandom number generator also has the ability to
+     * split, then the programmer may wish to consider instead extending
+     * {@link AbstractSplittableGenerator}.)
+     *
+     * <p> The programmer should generally provide at least three constructors:
+     * one that takes no arguments, one that accepts a {@code long} seed value,
+     * and one that accepts an array of seed {@code byte} values. This class
+     * provides a public {@link RandomSupport#initialSeed() initialSeed}()
+     * method that may be useful in initializing some static state from which to
+     * derive defaults seeds for use by the no-argument constructor.
+     *
+     * <p> For the stream methods (such as {@link RandomGenerator#ints() ints}()
+     * and {@link SplittableGenerator#splits() splits}()), this class provides
+     * {@link Spliterator}-based implementations that allow parallel execution
+     * when appropriate. In this respect {@link ArbitrarilyJumpableGenerator}
+     * differs from {@link JumpableGenerator}, which provides very simple
+     * implementations that produce sequential streams only.
+     *
+     * <p> An implementation of the {@link AbstractArbitrarilyJumpableGenerator}
+     * class must provide concrete definitions for the methods
+     * {@link RandomGenerator#nextInt() nextInt}(),
+     * {@link RandomGenerator#nextLong() nextLong}(),
+     * {@link AbstractArbitrarilyJumpableGenerator#jumps(double) jumps}(double),
+     * {@link JumpableGenerator#jumpDistance() jumpDistance}(),
+     * and
+     * {@link LeapableGenerator#leapDistance() leapDistance}().
+     * Default implementations are provided for all other methods.
+     *
+     * <p> The documentation for each non-abstract method in this class
+     * describes its implementation in detail. Each of these methods may be
+     * overridden if the pseudorandom number generator being implemented
+     * admits a more efficient implementation.
+     *
+     * @since 17
+     */
+    public abstract static class AbstractArbitrarilyJumpableGenerator
+            extends AbstractSpliteratorGenerator implements RandomGenerator.ArbitrarilyJumpableGenerator {
+
+        /*
+         * Implementation Overview.
+         *
+         * This class provides most of the "user API" methods needed to satisfy
+         * the interface ArbitrarilyJumpableGenerator.  Most of these methods
+         * are in turn inherited from AbstractGenerator and the non-public class
+         * AbstractSpliteratorGenerator; this file implements four versions of the
+         * jumps method and defines the spliterators necessary to support them.
+         *
+         * File organization: First the non-public methods needed by the class
+         * AbstractSpliteratorGenerator, then the main public methods, followed by some
+         * custom spliterator classes needed for stream methods.
+         */
+
+        /**
+         * Explicit constructor.
+         */
+        protected AbstractArbitrarilyJumpableGenerator() {
+        }
+
+        // Similar methods used by this class
+
+        Spliterator<RandomGenerator> makeJumpsSpliterator(long index, long fence, double distance) {
+            return new RandomJumpsSpliterator(this, index, fence, distance);
+        }
+
+        Spliterator<JumpableGenerator> makeLeapsSpliterator(long index, long fence, double distance) {
+            return new RandomLeapsSpliterator(this, index, fence, distance);
+        }
+
+        Spliterator<ArbitrarilyJumpableGenerator> makeArbitraryJumpsSpliterator(long index, long fence, double distance) {
+            return new RandomArbitraryJumpsSpliterator(this, index, fence, distance);
+        }
+
+        /* ---------------- public methods ---------------- */
+
+        /**
+         * Returns a new generator whose internal state is an exact copy of this
+         * generator (therefore their future behavior should be identical if
+         * subjected to the same series of operations).
+         *
+         * @return a new object that is a copy of this generator
+         */
+        public abstract AbstractArbitrarilyJumpableGenerator copy();
+
+        // Stream methods for jumping
+
+        private static <T> Stream<T> stream(Spliterator<T> srng) {
+            return StreamSupport.stream(srng, false);
+        }
+
+        @Override
+        public Stream<RandomGenerator> jumps() {
+            return stream(makeJumpsSpliterator(0L, Long.MAX_VALUE, jumpDistance()));
+        }
+
+        @Override
+        public Stream<RandomGenerator> jumps(long streamSize) {
+            RandomSupport.checkStreamSize(streamSize);
+            return stream(makeJumpsSpliterator(0L, streamSize, jumpDistance()));
+        }
+
+        @Override
+        public Stream<ArbitrarilyJumpableGenerator> jumps(double distance) {
+            return stream(makeArbitraryJumpsSpliterator(0L, Long.MAX_VALUE, distance));
+        }
+
+        @Override
+        public Stream<ArbitrarilyJumpableGenerator> jumps(long streamSize, double distance) {
+            RandomSupport.checkStreamSize(streamSize);
+            return stream(makeArbitraryJumpsSpliterator(0L, streamSize, distance));
+        }
+
+        @Override
+        public void leap() {
+            jump(leapDistance());
+        }
+
+        // Stream methods for leaping
+
+        @Override
+        public Stream<JumpableGenerator> leaps() {
+            return stream(makeLeapsSpliterator(0L, Long.MAX_VALUE, leapDistance()));
+        }
+
+        @Override
+        public Stream<JumpableGenerator> leaps(long streamSize) {
+            return stream(makeLeapsSpliterator(0L, streamSize, leapDistance()));
+        }
+
+
+        /**
+         * Spliterator for int streams. We multiplex the four int versions into
+         * one class by treating a bound less than origin as unbounded, and also
+         * by treating "infinite" as equivalent to
+         * {@link Long#MAX_VALUE Long.MAX_VALUE}. For splits, we choose to
+         * override the method {@code trySplit()} to try to optimize execution
+         * speed: instead of dividing a range in half, it breaks off the largest
+         * possible chunk whose size is a power of two such that the remaining
+         * chunk is not empty. In this way, the necessary jump distances will
+         * tend to be powers of two. The long and double versions of this class
+         * are identical except for types.
+         */
+        static class RandomIntsSpliterator extends RandomSupport.RandomSpliterator implements Spliterator.OfInt {
+            final ArbitrarilyJumpableGenerator generatingGenerator;
+            final int origin;
+            final int bound;
+
+            RandomIntsSpliterator(ArbitrarilyJumpableGenerator generatingGenerator, long index, long fence, int origin, int bound) {
+                super(index, fence);
+                this.origin = origin; this.bound = bound;
+                this.generatingGenerator = generatingGenerator;
+            }
+
+            public Spliterator.OfInt trySplit() {
+                long i = index, delta = Long.highestOneBit((fence - i) - 1), m = i + delta;
+                if (m <= i) return null;
+                index = m;
+                ArbitrarilyJumpableGenerator r = generatingGenerator;
+                return new RandomIntsSpliterator(r.copyAndJump((double)delta), i, m, origin, bound);
+            }
+
+            public boolean tryAdvance(IntConsumer consumer) {
+                Objects.requireNonNull(consumer);
+                long i = index, f = fence;
+                if (i < f) {
+                    consumer.accept(RandomSupport.boundedNextInt(generatingGenerator, origin, bound));
+                    index = i + 1;
+                    return true;
+                }
+                else return false;
+            }
+
+            public void forEachRemaining(IntConsumer consumer) {
+                Objects.requireNonNull(consumer);
+                long i = index, f = fence;
+                if (i < f) {
+                    index = f;
+                    ArbitrarilyJumpableGenerator r = generatingGenerator;
+                    int o = origin, b = bound;
+                    do {
+                        consumer.accept(RandomSupport.boundedNextInt(r, o, b));
+                    } while (++i < f);
+                }
+            }
+        }
+
+        /**
+         * Spliterator for long streams.
+         */
+        static class RandomLongsSpliterator extends RandomSupport.RandomSpliterator implements Spliterator.OfLong {
+            final ArbitrarilyJumpableGenerator generatingGenerator;
+            final long origin;
+            final long bound;
+
+            RandomLongsSpliterator(ArbitrarilyJumpableGenerator generatingGenerator, long index, long fence, long origin, long bound) {
+                super(index, fence);
+                this.generatingGenerator = generatingGenerator;
+                this.origin = origin; this.bound = bound;
+            }
+
+            public Spliterator.OfLong trySplit() {
+                long i = index, delta = Long.highestOneBit((fence - i) - 1), m = i + delta;
+                if (m <= i) return null;
+                index = m;
+                ArbitrarilyJumpableGenerator r = generatingGenerator;
+                return new RandomLongsSpliterator(r.copyAndJump((double)delta), i, m, origin, bound);
+            }
+
+            public boolean tryAdvance(LongConsumer consumer) {
+                Objects.requireNonNull(consumer);
+                long i = index, f = fence;
+                if (i < f) {
+                    consumer.accept(RandomSupport.boundedNextLong(generatingGenerator, origin, bound));
+                    index = i + 1;
+                    return true;
+                }
+                else return false;
+            }
+
+            public void forEachRemaining(LongConsumer consumer) {
+                Objects.requireNonNull(consumer);
+                long i = index, f = fence;
+                if (i < f) {
+                    index = f;
+                    ArbitrarilyJumpableGenerator r = generatingGenerator;
+                    long o = origin, b = bound;
+                    do {
+                        consumer.accept(RandomSupport.boundedNextLong(r, o, b));
+                    } while (++i < f);
+                }
+            }
+        }
+
+        /**
+         * Spliterator for double streams.
+         */
+        static class RandomDoublesSpliterator extends RandomSupport.RandomSpliterator implements Spliterator.OfDouble {
+            final ArbitrarilyJumpableGenerator generatingGenerator;
+            final double origin;
+            final double bound;
+
+            RandomDoublesSpliterator(ArbitrarilyJumpableGenerator generatingGenerator, long index, long fence, double origin, double bound) {
+                super(index, fence);
+                this.generatingGenerator = generatingGenerator;
+                this.origin = origin; this.bound = bound;
+            }
+
+            public Spliterator.OfDouble trySplit() {
+
+                long i = index, delta = Long.highestOneBit((fence - i) - 1), m = i + delta;
+                if (m <= i) return null;
+                index = m;
+                ArbitrarilyJumpableGenerator r = generatingGenerator;
+                return new RandomDoublesSpliterator(r.copyAndJump((double)delta), i, m, origin, bound);
+            }
+
+            public boolean tryAdvance(DoubleConsumer consumer) {
+                Objects.requireNonNull(consumer);
+                long i = index, f = fence;
+                if (i < f) {
+                    consumer.accept(RandomSupport.boundedNextDouble(generatingGenerator, origin, bound));
+                    index = i + 1;
+                    return true;
+                }
+                else return false;
+            }
+
+            public void forEachRemaining(DoubleConsumer consumer) {
+                Objects.requireNonNull(consumer);
+                long i = index, f = fence;
+                if (i < f) {
+                    index = f;
+                    ArbitrarilyJumpableGenerator r = generatingGenerator;
+                    double o = origin, b = bound;
+                    do {
+                        consumer.accept(RandomSupport.boundedNextDouble(r, o, b));
+                    } while (++i < f);
+                }
+            }
+        }
+
+        // Spliterators for producing new generators by jumping or leaping.  The
+        // complete implementation of each of these spliterators is right here.
+        // In the same manner as for the preceding spliterators, the method trySplit() is
+        // coded to optimize execution speed: instead of dividing a range
+        // in half, it breaks off the largest possible chunk whose
+        // size is a power of two such that the remaining chunk is not
+        // empty.  In this way, the necessary jump distances will tend to be
+        // powers of two.
+
+        /**
+         * Spliterator for stream of generators of type RandomGenerator produced
+         * by jumps.
+         */
+        static class RandomJumpsSpliterator extends RandomSupport.RandomSpliterator implements Spliterator<RandomGenerator> {
+            ArbitrarilyJumpableGenerator generatingGenerator;
+            final double distance;
+
+            RandomJumpsSpliterator(ArbitrarilyJumpableGenerator generatingGenerator, long index, long fence, double distance) {
+                super(index, fence);
+                this.generatingGenerator = generatingGenerator; this.distance = distance;
+            }
+
+            public Spliterator<RandomGenerator> trySplit() {
+                long i = index, delta = Long.highestOneBit((fence - i) - 1), m = i + delta;
+                if (m <= i) return null;
+                index = m;
+                ArbitrarilyJumpableGenerator r = generatingGenerator;
+                // Because delta is a power of two, (distance * (double)delta) can always be computed exactly.
+                return new RandomJumpsSpliterator(r.copyAndJump(distance * (double)delta), i, m, distance);
+            }
+
+            public boolean tryAdvance(Consumer<? super RandomGenerator> consumer) {
+                Objects.requireNonNull(consumer);
+                long i = index, f = fence;
+                if (i < f) {
+                    consumer.accept(generatingGenerator.copyAndJump(distance));
+                    index = i + 1;
+                    return true;
+                }
+                return false;
+            }
+
+            public void forEachRemaining(Consumer<? super RandomGenerator> consumer) {
+                Objects.requireNonNull(consumer);
+                long i = index, f = fence;
+                if (i < f) {
+                    index = f;
+                    ArbitrarilyJumpableGenerator r = generatingGenerator;
+                    do {
+                        consumer.accept(r.copyAndJump(distance));
+                    } while (++i < f);
+                }
+            }
+        }
+
+        /**
+         * Spliterator for stream of generators of type RandomGenerator produced
+         * by leaps.
+         */
+        static class RandomLeapsSpliterator extends RandomSupport.RandomSpliterator implements Spliterator<JumpableGenerator> {
+            ArbitrarilyJumpableGenerator generatingGenerator;
+            final double distance;
+
+            RandomLeapsSpliterator(ArbitrarilyJumpableGenerator generatingGenerator, long index, long fence, double distance) {
+                super(index, fence);
+                this.generatingGenerator = generatingGenerator; this.distance = distance;
+            }
+
+            public Spliterator<JumpableGenerator> trySplit() {
+                long i = index, delta = Long.highestOneBit((fence - i) - 1), m = i + delta;
+                if (m <= i) return null;
+                index = m;
+                // Because delta is a power of two, (distance * (double)delta) can always be computed exactly.
+                return new RandomLeapsSpliterator(generatingGenerator.copyAndJump(distance * (double)delta), i, m, distance);
+            }
+
+            public boolean tryAdvance(Consumer<? super JumpableGenerator> consumer) {
+                Objects.requireNonNull(consumer);
+                long i = index, f = fence;
+                if (i < f) {
+                    consumer.accept(generatingGenerator.copyAndJump(distance));
+                    index = i + 1;
+                    return true;
+                }
+                return false;
+            }
+
+            public void forEachRemaining(Consumer<? super JumpableGenerator> consumer) {
+                Objects.requireNonNull(consumer);
+                long i = index, f = fence;
+                if (i < f) {
+                    index = f;
+                    ArbitrarilyJumpableGenerator r = generatingGenerator;
+                    do {
+                        consumer.accept(r.copyAndJump(distance));
+                    } while (++i < f);
+                }
+            }
+        }
+
+        /**
+         * Spliterator for stream of generators of type RandomGenerator produced
+         * by arbitrary jumps.
+         */
+        static class RandomArbitraryJumpsSpliterator extends RandomSupport.RandomSpliterator implements Spliterator<ArbitrarilyJumpableGenerator> {
+            ArbitrarilyJumpableGenerator generatingGenerator;
+            final double distance;
+
+            RandomArbitraryJumpsSpliterator(ArbitrarilyJumpableGenerator generatingGenerator, long index, long fence, double distance) {
+                super(index, fence);
+                this.generatingGenerator = generatingGenerator; this.distance = distance;
+            }
+
+            public Spliterator<ArbitrarilyJumpableGenerator> trySplit() {
+                long i = index, delta = Long.highestOneBit((fence - i) - 1), m = i + delta;
+                if (m <= i) return null;
+                index = m;
+                // Because delta is a power of two, (distance * (double)delta) can always be computed exactly.
+                return new RandomArbitraryJumpsSpliterator(generatingGenerator.copyAndJump(distance * (double)delta), i, m, distance);
+            }
+
+            public boolean tryAdvance(Consumer<? super ArbitrarilyJumpableGenerator> consumer) {
+                Objects.requireNonNull(consumer);
+                long i = index, f = fence;
+                if (i < f) {
+                    consumer.accept(generatingGenerator.copyAndJump(distance));
+                    index = i + 1;
+                    return true;
+                }
+                return false;
+            }
+
+            public void forEachRemaining(Consumer<? super ArbitrarilyJumpableGenerator> consumer) {
+                Objects.requireNonNull(consumer);
+                long i = index, f = fence;
+                if (i < f) {
+                    index = f;
+                    ArbitrarilyJumpableGenerator r = generatingGenerator;
+                    do {
+                        consumer.accept(r.copyAndJump(distance));
+                    } while (++i < f);
+                }
+            }
+        }
+
+    }
+
+    /**
+     * This class provides much of the implementation of the
+     * {@link SplittableGenerator} interface, to minimize the effort required to
+     * implement this interface.
+     *
+     * <p> To implement a pseudorandom number generator, the programmer needs
+     * only to extend this class and provide implementations for the methods
+     * {@link RandomGenerator#nextInt() nextInt}(),
+     * {@link RandomGenerator#nextLong() nextLong}(),
+     * {@link SplittableGenerator#split(SplittableGenerator) split}(splittable).
+     *
+     * <p> (If the pseudorandom number generator also has the ability to jump
+     * an arbitrary specified distance, then the programmer may wish to consider
+     * instead extending the class {@link AbstractArbitrarilyJumpableGenerator}.
+     * See also the class {@link AbstractSplittableWithBrineGenerator}.)
+     *
+     * <p> The programmer should generally provide at least three constructors:
+     * one that takes no arguments, one that accepts a {@code long} seed value,
+     * and one that accepts an array of seed {@code byte} values. This class
+     * provides a public {@link RandomSupport#initialSeed() initialSeed}()
+     * method that may be useful in initializing some static state from which to
+     * derive defaults seeds for use by the no-argument constructor.
+     *
+     * <p> For the stream methods (such as {@link RandomGenerator#ints() ints}()
+     * and {@link SplittableGenerator#splits() splits}()), this class provides
+     * {@link Spliterator}-based implementations that allow parallel execution
+     * when appropriate.
+     *
+     * <p> The documentation for each non-abstract method in this class
+     * describes its implementation in detail. Each of these methods may be
+     * overridden if the pseudorandom number generator being implemented
+     * admits a more efficient implementation.
+     *
+     * @since 17
+     */
+    public abstract static class AbstractSplittableGenerator extends AbstractSpliteratorGenerator implements SplittableGenerator {
+
+        /*
+         * Implementation Overview.
+         *
+         * This class provides most of the "user API" methods needed to
+         * satisfy the interface SplittableGenerator.  Most of these methods
+         * are in turn inherited from AbstractGenerator and the non-public class
+         * AbstractSpliteratorGenerator; this class provides two versions of the
+         * splits method and defines the spliterators necessary to support
+         * them.
+         *
+         * File organization: First the non-public methods needed by the class
+         * AbstractSpliteratorGenerator, then the main public methods, followed by some
+         * custom spliterator classes.
+         */
+
+        /**
+         * Explicit constructor.
+         */
+        protected AbstractSplittableGenerator() {
+        }
+
+        Spliterator<SplittableGenerator> makeSplitsSpliterator(long index, long fence, SplittableGenerator source) {
+            return new RandomSplitsSpliterator(source, index, fence, this);
+        }
+
+        /* ---------------- public methods ---------------- */
+
+        /**
+         * Implements the {@code split()} method as
+         * {@link SplittableGenerator#split(SplittableGenerator) split}(this).
+         *
+         * @return the new {@link SplittableGenerator} instance
+         */
+        public SplittableGenerator split() {
+            return this.split(this);
+        }
+
+        // Stream methods for splittings
+
+        @Override
+        public Stream<SplittableGenerator> splits() {
+            return this.splits(Long.MAX_VALUE, this);
+        }
+
+        @Override
+        public Stream<SplittableGenerator> splits(long streamSize) {
+            return this.splits(streamSize, this);
+        }
+
+        @Override
+        public Stream<SplittableGenerator> splits(SplittableGenerator source) {
+            return this.splits(Long.MAX_VALUE, source);
+        }
+
+        @Override
+        public Stream<SplittableGenerator> splits(long streamSize, SplittableGenerator source) {
+            RandomSupport.checkStreamSize(streamSize);
+            Objects.requireNonNull(source, "source should be non-null");
+
+            return StreamSupport.stream(makeSplitsSpliterator(0L, streamSize, source), false);
+        }
+
+        /**
+         * Spliterator for int streams. We multiplex the four int versions into
+         * one class by treating a bound less than origin as unbounded, and also
+         * by treating "infinite" as equivalent to
+         * {@link Long#MAX_VALUE Long.MAX_VALUE}. For splits, it uses the
+         * standard divide-by-two approach. The long and double versions of this
+         * class are identical except for types.
+         */
+        static class RandomIntsSpliterator extends RandomSupport.RandomSpliterator implements Spliterator.OfInt {
+            final SplittableGenerator generatingGenerator;
+            final int origin;
+            final int bound;
+
+            RandomIntsSpliterator(SplittableGenerator generatingGenerator, long index, long fence, int origin, int bound) {
+                super(index, fence);
+                this.generatingGenerator = generatingGenerator;
+                this.origin = origin; this.bound = bound;
+            }
+
+            public Spliterator.OfInt trySplit() {
+                long i = index, m = (i + fence) >>> 1;
+                if (m <= i) return null;
+                index = m;
+                return new RandomIntsSpliterator(generatingGenerator.split(), i, m, origin, bound);
+            }
+
+            public boolean tryAdvance(IntConsumer consumer) {
+                Objects.requireNonNull(consumer);
+                long i = index, f = fence;
+                if (i < f) {
+                    consumer.accept(RandomSupport.boundedNextInt(generatingGenerator, origin, bound));
+                    index = i + 1;
+                    return true;
+                }
+                else return false;
+            }
+
+            public void forEachRemaining(IntConsumer consumer) {
+                Objects.requireNonNull(consumer);
+                long i = index, f = fence;
+                if (i < f) {
+                    index = f;
+                    RandomGenerator r = generatingGenerator;
+                    int o = origin, b = bound;
+                    do {
+                        consumer.accept(RandomSupport.boundedNextInt(r, o, b));
+                    } while (++i < f);
+                }
+            }
+        }
+
+        /**
+         * Spliterator for long streams.
+         */
+        static class RandomLongsSpliterator extends RandomSupport.RandomSpliterator implements Spliterator.OfLong {
+            final SplittableGenerator generatingGenerator;
+            final long origin;
+            final long bound;
+
+            RandomLongsSpliterator(SplittableGenerator generatingGenerator, long index, long fence, long origin, long bound) {
+                super(index, fence);
+                this.generatingGenerator = generatingGenerator;
+                this.origin = origin; this.bound = bound;
+            }
+
+            public Spliterator.OfLong trySplit() {
+                long i = index, m = (i + fence) >>> 1;
+                if (m <= i) return null;
+                index = m;
+                return new RandomLongsSpliterator(generatingGenerator.split(), i, m, origin, bound);
+            }
+
+            public boolean tryAdvance(LongConsumer consumer) {
+                Objects.requireNonNull(consumer);
+                long i = index, f = fence;
+                if (i < f) {
+                    consumer.accept(RandomSupport.boundedNextLong(generatingGenerator, origin, bound));
+                    index = i + 1;
+                    return true;
+                }
+                else return false;
+            }
+
+            public void forEachRemaining(LongConsumer consumer) {
+                Objects.requireNonNull(consumer);
+                long i = index, f = fence;
+                if (i < f) {
+                    index = f;
+                    RandomGenerator r = generatingGenerator;
+                    long o = origin, b = bound;
+                    do {
+                        consumer.accept(RandomSupport.boundedNextLong(r, o, b));
+                    } while (++i < f);
+                }
+            }
+        }
+
+        /**
+         * Spliterator for double streams.
+         */
+        static class RandomDoublesSpliterator extends RandomSupport.RandomSpliterator implements Spliterator.OfDouble {
+            final SplittableGenerator generatingGenerator;
+            final double origin;
+            final double bound;
+
+            RandomDoublesSpliterator(SplittableGenerator generatingGenerator, long index, long fence, double origin, double bound) {
+                super(index, fence);
+                this.generatingGenerator = generatingGenerator;
+                this.origin = origin; this.bound = bound;
+            }
+
+            public Spliterator.OfDouble trySplit() {
+                long i = index, m = (i + fence) >>> 1;
+                if (m <= i) return null;
+                index = m;
+                return new RandomDoublesSpliterator(generatingGenerator.split(), i, m, origin, bound);
+            }
+
+            public boolean tryAdvance(DoubleConsumer consumer) {
+                Objects.requireNonNull(consumer);
+                long i = index, f = fence;
+                if (i < f) {
+                    consumer.accept(RandomSupport.boundedNextDouble(generatingGenerator, origin, bound));
+                    index = i + 1;
+                    return true;
+                }
+                else return false;
+            }
+
+            public void forEachRemaining(DoubleConsumer consumer) {
+                Objects.requireNonNull(consumer);
+                long i = index, f = fence;
+                if (i < f) {
+                    index = f;
+                    RandomGenerator r = generatingGenerator;
+                    double o = origin, b = bound;
+                    do {
+                        consumer.accept(RandomSupport.boundedNextDouble(r, o, b));
+                    } while (++i < f);
+                }
+            }
+        }
+
+        /**
+         * Spliterator for stream of generators of type SplittableGenerator. We
+         * multiplex the two versions into one class by treating "infinite" as
+         * equivalent to Long.MAX_VALUE. For splits, it uses the standard
+         * divide-by-two approach.
+         */
+        static class RandomSplitsSpliterator extends RandomSpliterator implements Spliterator<SplittableGenerator> {
+            final SplittableGenerator generatingGenerator;
+            final SplittableGenerator constructingGenerator;
+
+            RandomSplitsSpliterator(SplittableGenerator generatingGenerator,
+                                    long index, long fence,
+                                    SplittableGenerator constructingGenerator) {
+                super(index, fence);
+                this.generatingGenerator = generatingGenerator;
+                this.constructingGenerator = constructingGenerator;
+            }
+
+            public Spliterator<SplittableGenerator> trySplit() {
+                long i = index, m = (i + fence) >>> 1;
+                if (m <= i) return null;
+                index = m;
+                return new RandomSplitsSpliterator(generatingGenerator.split(), i, m, constructingGenerator);
+            }
+
+            public boolean tryAdvance(Consumer<? super SplittableGenerator> consumer) {
+                Objects.requireNonNull(consumer);
+                long i = index, f = fence;
+                if (i < f) {
+                    consumer.accept(constructingGenerator.split(generatingGenerator));
+                    index = i + 1;
+                    return true;
+                }
+                else return false;
+            }
+
+            public void forEachRemaining(Consumer<? super SplittableGenerator> consumer) {
+                Objects.requireNonNull(consumer);
+                long i = index, f = fence;
+                if (i < f) {
+                    index = f;
+                    SplittableGenerator c = constructingGenerator;
+                    SplittableGenerator r = generatingGenerator;
+                    do {
+                        consumer.accept(c.split(r));
+                    } while (++i < f);
+                }
+            }
+        }
+
+    }
+
+    /**
+     * This class provides much of the implementation of the
+     * {@link SplittableGenerator} interface, to minimize the effort required to
+     * implement this interface. It is similar to the class
+     * {@link AbstractSplittableGenerator} but makes use of the brine technique
+     * for ensuring that distinct generators created by a single call to a
+     * {@link SplittableGenerator#splits() splits}() method have distinct state
+     * cycles.
+     *
+     * <p> To implement a pseudorandom number generator, the programmer needs
+     * only to extend this class and provide implementations for the methods
+     * {@link RandomGenerator#nextInt() nextInt}(),
+     * {@link RandomGenerator#nextLong() nextLong}(),
+     * {@link RandomSplitsSpliteratorWithSalt#split(SplittableGenerator, long) split}(splittable, brine).
+     *
+     * <p> The programmer should generally provide at least three constructors:
+     * one that takes no arguments, one that accepts a {@code long} seed value,
+     * and one that accepts an array of seed {@code byte} values. This class
+     * provides a public {@link RandomSupport#initialSeed() initialSeed}()
+     * method that may be useful in initializing some static state from which to
+     * derive defaults seeds for use by the no-argument constructor.
+     *
+     * <p> For the stream methods (such as {@link RandomGenerator#ints() ints}()
+     * and {@link SplittableGenerator#splits() splits}()), this class provides
+     * {@link Spliterator}-based implementations that allow parallel execution
+     * when appropriate.
+     *
+     * <p> The documentation for each non-abstract method in this class
+     * describes its implementation in detail. Each of these methods may be
+     * overridden if the pseudorandom number generator being implemented
+     * admits a more efficient implementation.
+     *
+     * @since 17
+     */
+    public abstract static class AbstractSplittableWithBrineGenerator
+            extends AbstractSplittableGenerator {
+
+        /*
+         * Implementation Overview.
+         *
+         * This class provides most of the "user API" methods needed to
+         * satisfy the interface SplittableGenerator.  Most of these methods
+         * are in turn inherited from AbstractSplittableGenerator and the non-public class
+         * AbstractSpliteratorGenerator; this class provides four versions of the
+         * splits method and defines the spliterators necessary to support
+         * them.
+         *
+         * File organization: First the non-public methods needed by the class
+         * AbstractSplittableWithBrineGenerator, then the main public methods,
+         * followed by some custom spliterator classes needed for stream methods.
+         */
+
+        /**
+         * Explicit constructor.
+         */
+        protected AbstractSplittableWithBrineGenerator() {
+        }
+
+        // The salt consists groups of bits each SALT_SHIFT in size, starting from
+        // the left-hand (high-order) end of the word.  We can regard them as
+        // digits base (1 << SALT_SHIFT).  If SALT_SHIFT does not divide 64
+        // evenly, then any leftover bits at the low end of the word are zero.
+        // The lowest digit of the salt is set to the largest possible digit
+        // (all 1-bits, or ((1 << SALT_SHIFT) - 1)); all other digits are set
+        // to a randomly chosen value less than that largest possible digit.
+        // The salt may be shifted left by SALT_SHIFT any number of times.
+        // If any salt remains in the word, its right-hand end can be identified
+        // by searching from left to right for an occurrence of a digit that is
+        // all 1-bits (not that we ever do that; this is simply a proof that one
+        // can identify the boundary between the salt and the index if any salt
+        // remains in the word).  The idea is that before computing the bitwise OR
+        // of an index and the salt, one can first check to see whether the
+        // bitwise AND is nonzero; if so, one can shift the salt left by
+        // SALT_SHIFT and try again.  In this way, when the bitwise OR is
+        // computed, if the salt is nonzero then its rightmost 1-bit is to the
+        // left of the leftmost 1-bit of the index.
+
+        // We need 2 <= SALT_SHIFT <= 63 (3 through 8 are good values; 4 is probably best)
+        static final int SALT_SHIFT = 4;
+
+        // Methods required by class AbstractSpliteratorGenerator (override)
+        Spliterator<SplittableGenerator> makeSplitsSpliterator(long index, long fence, SplittableGenerator source) {
+            // This little algorithm to generate a new salt value is carefully
+            // designed to work even if SALT_SHIFT does not evenly divide 64
+            // (the number of bits in a long value).
+            long bits = nextLong();
+            long multiplier = (1L << SALT_SHIFT) - 1;
+            long salt = multiplier << (64 - SALT_SHIFT);
+            while ((salt & multiplier) == 0) {
+                long digit = Math.unsignedMultiplyHigh(bits, multiplier);
+                salt = (salt >>> SALT_SHIFT) | (digit << (64 - SALT_SHIFT));
+                bits *= multiplier;
+            }
+            // This is the point at which newly generated salt gets injected into
+            // the root of a newly created brine-generating splits-spliterator.
+            return new RandomSplitsSpliteratorWithSalt(source, index, fence, this, salt);
+        }
+
+        /* ---------------- public methods ---------------- */
+
+        // Stream methods for splitting
+
+        /**
+         * Constructs and returns a new instance of
+         * {@link AbstractSplittableWithBrineGenerator} that shares no mutable
+         * state with this instance. However, with very high probability, the
+         * set of values collectively generated by the two objects should have
+         * the same statistical properties as if the same quantity of values
+         * were generated by a single thread using a single may be
+         * {@link AbstractSplittableWithBrineGenerator} object. Either or both
+         * of the two objects further split using the
+         * {@link SplittableGenerator#split() split}() method, and the same
+         * expected statistical properties apply to the entire set of generators
+         * constructed by such recursive splitting.
+         *
+         * @param brine a long value, of which the low 63 bits provide a unique id
+         * among calls to this method for constructing a single series of Generator objects.
+         *
+         * @return the new {@code AbstractSplittableWithBrineGenerator} instance
+         */
+        public SplittableGenerator split(long brine) {
+            return this.split(this, brine);
+        }
+
+        @Override
+        public SplittableGenerator split(SplittableGenerator source) {
+            // It's a one-off: supply randomly chosen brine
+            return this.split(source, source.nextLong());
+        }
+
+        public abstract SplittableGenerator split(SplittableGenerator source, long brine);
+
+
+        /* ---------------- spliterator ---------------- */
+        /**
+         * Alternate spliterator for stream of generators of type
+         * SplittableGenerator. We multiplex the two versions into one class by
+         * treating "infinite" as equivalent to Long.MAX_VALUE. For splits, it
+         * uses the standard divide-by-two approach.
+         *
+         * <p> This differs from
+         * {@link AbstractSplittableGenerator.RandomSplitsSpliterator} in that it
+         * provides a brine argument (a mixture of salt and an index) when
+         * calling the {@link SplittableGenerator#split() split}() method.
+         */
+        static class RandomSplitsSpliteratorWithSalt
+                extends RandomSpliterator implements Spliterator<SplittableGenerator> {
+
+            final SplittableGenerator generatingGenerator;
+            final AbstractSplittableWithBrineGenerator constructingGenerator;
+            long salt;
+
+            // Important invariant: 0 <= index <= fence
+
+            // Important invariant: if salt and index are both nonzero,
+            // the rightmost 1-bit of salt is to the left of the leftmost 1-bit of index.
+            // If necessary, the salt can be leftshifted by SALT_SHIFT as many times as
+            // necessary to maintain the invariant.
+
+            RandomSplitsSpliteratorWithSalt(SplittableGenerator generatingGenerator, long index, long fence,
+                                            AbstractSplittableWithBrineGenerator constructingGenerator, long salt) {
+                super(index, fence);
+                this.generatingGenerator = generatingGenerator;
+                this.constructingGenerator = constructingGenerator;
+                while ((salt != 0) && (Long.compareUnsigned(salt & -salt, index) <= 0)) {
+                    salt = salt << SALT_SHIFT;
+                }
+                this.salt = salt;
+            }
+
+            public Spliterator<SplittableGenerator> trySplit() {
+                long i = index, m = (i + fence) >>> 1;
+                if (m <= i) return null;
+                RandomSplitsSpliteratorWithSalt result =
+                        new RandomSplitsSpliteratorWithSalt(generatingGenerator.split(), i, m, constructingGenerator, salt);
+                index = m;
+                while ((salt != 0) && (Long.compareUnsigned(salt & -salt, index) <= 0)) {
+                    salt = salt << SALT_SHIFT;
+                }
+                return result;
+            }
+
+            public boolean tryAdvance(Consumer<? super SplittableGenerator> consumer) {
+                Objects.requireNonNull(consumer);
+                long i = index, f = fence;
+                if (i < f) {
+                    consumer.accept(constructingGenerator.split(generatingGenerator, salt | i));
+                    ++i;
+                    index = i;
+                    if ((i & salt) != 0) salt <<= SALT_SHIFT;
+                    return true;
+                }
+                return false;
+            }
+
+            public void forEachRemaining(Consumer<? super SplittableGenerator> consumer) {
+                Objects.requireNonNull(consumer);
+                long i = index, f = fence;
+                if (i < f) {
+                    index = f;
+                    AbstractSplittableWithBrineGenerator c = constructingGenerator;
+                    SplittableGenerator r = generatingGenerator;
+                    do {
+                        consumer.accept(c.split(r, salt | i));
+                        ++i;
+                        if ((i & salt) != 0) salt <<= SALT_SHIFT;
+                    } while (i < f);
+                }
+            }
+        }
+    }
+
+    /**
+     * Implementation support for modified-ziggurat implementation of
+     * nextExponential()
+     *
+     * <p> This Java class was generated automatically by a program
+     * `create_ziggurat_tables.c`.
+     *
+     * <p> Fraction of the area under the curve that lies outside the layer
+     * boxes: 0.0156 Fraction of non-box area that lies in the tail of the
+     * distribution: 0.0330
+     */
+    static final class DoubleZigguratTables {
+
+        static final int exponentialNumberOfLayers = 252;
+        static final int exponentialLayerMask = 0xff;
+        static final int exponentialAliasMask = 0xff;
+        static final int exponentialSignCorrectionMask = 0xff;
+        static final double exponentialX0 = 7.56927469414806264;
+        static final long exponentialConvexMargin = 853965788476313645L;   // unscaled convex margin = 0.0926
+
+        // exponential_X[i] = length of ziggurat layer i for exponential distribution, scaled by 2**(-63)
+        static final double[] exponentialX = {      // 253 entries, which is exponential_number_of_layers+1
+                8.2066240675348816e-19,  7.3973732351607284e-19,  6.9133313377915293e-19,  6.5647358820964533e-19,
+                6.2912539959818508e-19,  6.0657224129604964e-19,  5.8735276103737269e-19,  5.7058850528536941e-19,
+                5.5570945691622390e-19,  5.4232438903743953e-19,  5.3015297696508776e-19,  5.1898739257708062e-19,
+                5.0866922617998330e-19,  4.9907492938796469e-19,  4.9010625894449536e-19,  4.8168379010649187e-19,
+                4.7374238653644714e-19,  4.6622795807196824e-19,  4.5909509017784048e-19,  4.5230527790658154e-19,
+                4.4582558816353960e-19,  4.3962763126368381e-19,  4.3368675967106470e-19,  4.2798143618469714e-19,
+                4.2249273027064889e-19,  4.1720391253464110e-19,  4.1210012522465616e-19,  4.0716811225869233e-19,
+                4.0239599631006903e-19,  3.9777309342877357e-19,  3.9328975785334499e-19,  3.8893725129310323e-19,
+                3.8470763218720385e-19,  3.8059366138180143e-19,  3.7658872138544730e-19,  3.7268674692030177e-19,
+                3.6888216492248162e-19,  3.6516984248800068e-19,  3.6154504153287473e-19,  3.5800337915318032e-19,
+                3.5454079284533432e-19,  3.5115350988784242e-19,  3.4783802030030962e-19,  3.4459105288907336e-19,
+                3.4140955396563316e-19,  3.3829066838741162e-19,  3.3523172262289001e-19,  3.3223020958685874e-19,
+                3.2928377502804472e-19,  3.2639020528202049e-19,  3.2354741622810815e-19,  3.2075344331080789e-19,
+                3.1800643250478609e-19,  3.1530463211820845e-19,  3.1264638534265134e-19,  3.1003012346934211e-19,
+                3.0745435970137301e-19,  3.0491768350005559e-19,  3.0241875541094565e-19,  2.9995630232144550e-19,
+                2.9752911310742592e-19,  2.9513603463113224e-19,  2.9277596805684267e-19,  2.9044786545442563e-19,
+                2.8815072666416712e-19,  2.8588359639906928e-19,  2.8364556156331615e-19,  2.8143574876779799e-19,
+                2.7925332202553125e-19,  2.7709748061152879e-19,  2.7496745707320232e-19,  2.7286251537873397e-19,
+                2.7078194919206054e-19,  2.6872508026419050e-19,  2.6669125693153442e-19,  2.6467985271278891e-19,
+                2.6269026499668434e-19,  2.6072191381359757e-19,  2.5877424068465143e-19,  2.5684670754248168e-19,
+                2.5493879571835479e-19,  2.5305000499077481e-19,  2.5117985269112710e-19,  2.4932787286227806e-19,
+                2.4749361546638660e-19,  2.4567664563848669e-19,  2.4387654298267842e-19,  2.4209290090801527e-19,
+                2.4032532600140538e-19,  2.3857343743505147e-19,  2.3683686640614648e-19,  2.3511525560671253e-19,
+                2.3340825872163284e-19,  2.3171553995306794e-19,  2.3003677356958333e-19,  2.2837164347843482e-19,
+                2.2671984281957174e-19,  2.2508107358001938e-19,  2.2345504622739592e-19,  2.2184147936140775e-19,
+                2.2024009938224424e-19,  2.1865064017486842e-19,  2.1707284280826716e-19,  2.1550645524878675e-19,
+                2.1395123208673778e-19,  2.1240693427550640e-19,  2.1087332888245875e-19,  2.0935018885097035e-19,
+                2.0783729277295508e-19,  2.0633442467130712e-19,  2.0484137379170616e-19,  2.0335793440326865e-19,
+                2.0188390560756090e-19,  2.0041909115551697e-19,  1.9896329927183254e-19,  1.9751634248643090e-19,
+                1.9607803747261946e-19,  1.9464820489157862e-19,  1.9322666924284314e-19,  1.9181325872045647e-19,
+                1.9040780507449479e-19,  1.8901014347767504e-19,  1.8762011239677479e-19,  1.8623755346860768e-19,
+                1.8486231138030984e-19,  1.8349423375370566e-19,  1.8213317103353295e-19,  1.8077897637931708e-19,
+                1.7943150556069476e-19,  1.7809061685599652e-19,  1.7675617095390567e-19,  1.7542803085801941e-19,
+                1.7410606179414531e-19,  1.7279013112017240e-19,  1.7148010823836362e-19,  1.7017586450992059e-19,
+                1.6887727317167824e-19,  1.6758420925479093e-19,  1.6629654950527621e-19,  1.6501417230628659e-19,
+                1.6373695760198277e-19,  1.6246478682288560e-19,  1.6119754281258616e-19,  1.5993510975569615e-19,
+                1.5867737310692309e-19,  1.5742421952115544e-19,  1.5617553678444595e-19,  1.5493121374578016e-19,
+                1.5369114024951992e-19,  1.5245520706841019e-19,  1.5122330583703858e-19,  1.4999532898563561e-19,
+                1.4877116967410352e-19,  1.4755072172615974e-19,  1.4633387956347966e-19,  1.4512053813972103e-19,
+                1.4391059287430991e-19,  1.4270393958586506e-19,  1.4150047442513381e-19,  1.4030009380730888e-19,
+                1.3910269434359025e-19,  1.3790817277185197e-19,  1.3671642588626657e-19,  1.3552735046573446e-19,
+                1.3434084320095729e-19,  1.3315680061998685e-19,  1.3197511901207148e-19,  1.3079569434961214e-19,
+                1.2961842220802957e-19,  1.2844319768333099e-19,  1.2726991530715219e-19,  1.2609846895903523e-19,
+                1.2492875177568625e-19,  1.2376065605693940e-19,  1.2259407316813331e-19,  1.2142889343858445e-19,
+                1.2026500605581765e-19,  1.1910229895518744e-19,  1.1794065870449425e-19,  1.1677997038316715e-19,
+                1.1562011745554883e-19,  1.1446098163777869e-19,  1.1330244275772562e-19,  1.1214437860737343e-19,
+                1.1098666478700728e-19,  1.0982917454048923e-19,  1.0867177858084351e-19,  1.0751434490529747e-19,
+                1.0635673859884002e-19,  1.0519882162526621e-19,  1.0404045260457141e-19,  1.0288148657544097e-19,
+                1.0172177474144965e-19,  1.0056116419943559e-19,  9.9399497648346677e-20,  9.8236613076667446e-20,
+                9.7072343426320094e-20,  9.5906516230690634e-20,  9.4738953224154196e-20,  9.3569469920159036e-20,
+                9.2397875154569468e-20,  9.1223970590556472e-20,  9.0047550180852874e-20,  8.8868399582647627e-20,
+                8.7686295519767450e-20,  8.6501005086071005e-20,  8.5312284983141187e-20,  8.4119880684385214e-20,
+                8.2923525516513420e-20,  8.1722939648034506e-20,  8.0517828972839211e-20,  7.9307883875099226e-20,
+                7.8092777859524425e-20,  7.6872166028429042e-20,  7.5645683383965122e-20,  7.4412942930179128e-20,
+                7.3173533545093332e-20,  7.1927017587631075e-20,  7.0672928197666785e-20,  6.9410766239500362e-20,
+                6.8139996829256425e-20,  6.6860045374610234e-20,  6.5570293040210081e-20,  6.4270071533368528e-20,
+                6.2958657080923559e-20,  6.1635263438143136e-20,  6.0299033732151700e-20,  5.8949030892850181e-20,
+                5.7584226359885930e-20,  5.6203486669597397e-20,  5.4805557413499315e-20,  5.3389043909003295e-20,
+                5.1952387717989917e-20,  5.0493837866338355e-20,  4.9011415222629489e-20,  4.7502867933366117e-20,
+                4.5965615001265455e-20,  4.4396673897997565e-20,  4.2792566302148588e-20,  4.1149193273430015e-20,
+                3.9461666762606287e-20,  3.7724077131401685e-20,  3.5929164086204360e-20,  3.4067836691100565e-20,
+                3.2128447641564046e-20,  3.0095646916399994e-20,  2.7948469455598328e-20,  2.5656913048718645e-20,
+                2.3175209756803909e-20,  2.0426695228251291e-20,  1.7261770330213485e-20,  1.3281889259442578e-20,
+                0.0000000000000000e+00 };
+
+        // exponential_Y[i] = value of the exponential distribution function at exponential_X[i], scaled by 2**(-63)
+        static final double[] exponentialY = {      // 253 entries, which is exponential_number_of_layers+1
+                5.5952054951127360e-23,  1.1802509982703313e-22,  1.8444423386735829e-22,  2.5439030466698309e-22,
+                3.2737694311509334e-22,  4.0307732132706715e-22,  4.8125478319495115e-22,  5.6172914896583308e-22,
+                6.4435820540443526e-22,  7.2902662343463681e-22,  8.1563888456321941e-22,  9.0411453683482223e-22,
+                9.9438488486399206e-22,  1.0863906045969114e-21,  1.1800799775461269e-21,  1.2754075534831208e-21,
+                1.3723331176377290e-21,  1.4708208794375214e-21,  1.5708388257440445e-21,  1.6723581984374566e-21,
+                1.7753530675030514e-21,  1.8797999785104595e-21,  1.9856776587832504e-21,  2.0929667704053244e-21,
+                2.2016497009958240e-21,  2.3117103852306179e-21,  2.4231341516125464e-21,  2.5359075901420891e-21,
+                2.6500184374170538e-21,  2.7654554763660391e-21,  2.8822084483468604e-21,  3.0002679757547711e-21,
+                3.1196254936130377e-21,  3.2402731888801749e-21,  3.3622039464187092e-21,  3.4854113007409036e-21,
+                3.6098893927859475e-21,  3.7356329310971768e-21,  3.8626371568620053e-21,  3.9908978123552837e-21,
+                4.1204111123918948e-21,  4.2511737184488913e-21,  4.3831827151633737e-21,  4.5164355889510656e-21,
+                4.6509302085234806e-21,  4.7866648071096003e-21,  4.9236379662119969e-21,  5.0618486007478993e-21,
+                5.2012959454434732e-21,  5.3419795423648946e-21,  5.4838992294830959e-21,  5.6270551301806347e-21,
+                5.7714476436191935e-21,  5.9170774358950678e-21,  6.0639454319177027e-21,  6.2120528079531677e-21,
+                6.3614009847804375e-21,  6.5119916214136427e-21,  6.6638266093481696e-21,  6.8169080672926277e-21,
+                6.9712383363524377e-21,  7.1268199756340822e-21,  7.2836557582420336e-21,  7.4417486676430174e-21,
+                7.6011018943746355e-21,  7.7617188330775411e-21,  7.9236030798322572e-21,  8.0867584297834842e-21,
+                8.2511888750363333e-21,  8.4168986028103258e-21,  8.5838919938383098e-21,  8.7521736209986459e-21,
+                8.9217482481700712e-21,  9.0926208292996504e-21,  9.2647965076751277e-21,  9.4382806153938292e-21,
+                9.6130786730210328e-21,  9.7891963894314161e-21,  9.9666396618278840e-21,  1.0145414575932636e-20,
+                1.0325527406345955e-20,  1.0506984617068672e-20,  1.0689792862184811e-20,  1.0873958986701341e-20,
+                1.1059490027542400e-20,  1.1246393214695825e-20,  1.1434675972510121e-20,  1.1624345921140471e-20,
+                1.1815410878142659e-20,  1.2007878860214202e-20,  1.2201758085082226e-20,  1.2397056973538040e-20,
+                1.2593784151618565e-20,  1.2791948452935152e-20,  1.2991558921150600e-20,  1.3192624812605428e-20,
+                1.3395155599094805e-20,  1.3599160970797774e-20,  1.3804650839360727e-20,  1.4011635341137284e-20,
+                1.4220124840587164e-20,  1.4430129933836705e-20,  1.4641661452404201e-20,  1.4854730467093280e-20,
+                1.5069348292058084e-20,  1.5285526489044050e-20,  1.5503276871808626e-20,  1.5722611510726402e-20,
+                1.5943542737583543e-20,  1.6166083150566702e-20,  1.6390245619451956e-20,  1.6616043290999594e-20,
+                1.6843489594561079e-20,  1.7072598247904713e-20,  1.7303383263267072e-20,  1.7535858953637607e-20,
+                1.7770039939284241e-20,  1.8005941154528286e-20,  1.8243577854777398e-20,  1.8482965623825808e-20,
+                1.8724120381431627e-20,  1.8967058391181452e-20,  1.9211796268653192e-20,  1.9458350989888484e-20,
+                1.9706739900186868e-20,  1.9956980723234356e-20,  2.0209091570579904e-20,  2.0463090951473895e-20,
+                2.0718997783083593e-20,  2.0976831401101350e-20,  2.1236611570762130e-20,  2.1498358498287976e-20,
+                2.1762092842777868e-20,  2.2027835728562592e-20,  2.2295608758045219e-20,  2.2565434025049041e-20,
+                2.2837334128696004e-20,  2.3111332187840010e-20,  2.3387451856080863e-20,  2.3665717337386111e-20,
+                2.3946153402349610e-20,  2.4228785405117410e-20,  2.4513639301013211e-20,  2.4800741664897764e-20,
+                2.5090119710298442e-20,  2.5381801309347597e-20,  2.5675815013570500e-20,  2.5972190075566336e-20,
+                2.6270956471628253e-20,  2.6572144925351523e-20,  2.6875786932281841e-20,  2.7181914785659148e-20,
+                2.7490561603315974e-20,  2.7801761355793055e-20,  2.8115548895739172e-20,  2.8431959988666534e-20,
+                2.8751031345137833e-20,  2.9072800654466307e-20,  2.9397306620015486e-20,  2.9724588996191657e-20,
+                3.0054688627228112e-20,  3.0387647487867642e-20,  3.0723508726057078e-20,  3.1062316707775905e-20,
+                3.1404117064129991e-20,  3.1748956740850969e-20,  3.2096884050352357e-20,  3.2447948726504914e-20,
+                3.2802201982306013e-20,  3.3159696570631373e-20,  3.3520486848272230e-20,  3.3884628843476888e-20,
+                3.4252180327233346e-20,  3.4623200888548644e-20,  3.4997752014001677e-20,  3.5375897171869060e-20,
+                3.5757701901149035e-20,  3.6143233905835799e-20,  3.6532563154827400e-20,  3.6925761987883572e-20,
+                3.7322905228086981e-20,  3.7724070301302117e-20,  3.8129337363171041e-20,  3.8538789434235234e-20,
+                3.8952512543827862e-20,  3.9370595883442399e-20,  3.9793131970351439e-20,  4.0220216822325769e-20,
+                4.0651950144388133e-20,  4.1088435528630944e-20,  4.1529780668232712e-20,  4.1976097586926582e-20,
+                4.2427502885307452e-20,  4.2884118005513604e-20,  4.3346069515987453e-20,  4.3813489418210257e-20,
+                4.4286515477520838e-20,  4.4765291580372353e-20,  4.5249968120658306e-20,  4.5740702418054417e-20,
+                4.6237659171683015e-20,  4.6741010952818368e-20,  4.7250938740823415e-20,  4.7767632507051219e-20,
+                4.8291291852069895e-20,  4.8822126702292804e-20,  4.9360358072933852e-20,  4.9906218905182021e-20,
+                5.0459954986625539e-20,  5.1021825965285324e-20,  5.1592106469178258e-20,  5.2171087345169234e-20,
+                5.2759077033045284e-20,  5.3356403093325858e-20,  5.3963413910399511e-20,  5.4580480596259246e-20,
+                5.5207999124535584e-20,  5.5846392729873830e-20,  5.6496114614193770e-20,  5.7157651009290713e-20,
+                5.7831524654956632e-20,  5.8518298763794323e-20,  5.9218581558791713e-20,  5.9933031488338700e-20,
+                6.0662363246796887e-20,  6.1407354758435000e-20,  6.2168855320499763e-20,  6.2947795150103727e-20,
+                6.3745196643214394e-20,  6.4562187737537985e-20,  6.5400017881889097e-20,  6.6260077263309343e-20,
+                6.7143920145146620e-20,  6.8053293447301698e-20,  6.8990172088133000e-20,  6.9956803158564498e-20,
+                7.0955761794878430e-20,  7.1990022788945080e-20,  7.3063053739105458e-20,  7.4178938266266893e-20,
+                7.5342542134173124e-20,  7.6559742171142969e-20,  7.7837749863412850e-20,  7.9185582674029512e-20,
+                8.0614775537353300e-20,  8.2140502769818073e-20,  8.3783445978280519e-20,  8.5573129249678161e-20,
+                8.7554459669590100e-20,  8.9802388057706877e-20,  9.2462471421151086e-20,  9.5919641344951721e-20,
+                1.0842021724855044e-19 };
+
+        // alias_threshold[j] is a threshold for the probability mass function that has been
+        // scaled by (2**64 - 1), translated by -(2**63), and represented as a long value;
+        // in this way it can be directly compared to a randomly chosen long value.
+        static final long[] exponentialAliasThreshold = {    // 256 entries
+                9223372036854775807L,  1623796909450829958L,  2664290944894281002L,  7387971354164055035L,
+                6515064486552722205L,  8840508362680707094L,  6099647593382923818L,  7673130333659514446L,
+                6220332867583438718L,  5045979640552814279L,  4075305837223956071L,  3258413672162525964L,
+                2560664887087763045L,  1957224924672900129L,  1429800935350578000L,   964606309710808688L,
+                551043923599587587L,   180827629096889062L,  -152619738120023316L,  -454588624410291246L,
+                -729385126147774679L,  -980551509819444511L, -1211029700667463575L, -1423284293868546830L,
+                -1619396356369066372L, -1801135830956194794L, -1970018048575634032L, -2127348289059688469L,
+                -2274257249303687482L, -2411729520096654942L, -2540626634159182211L, -2661705860113406183L,
+                -2775635634532464842L, -2883008316030448462L, -2984350790383654449L, -3080133339198118132L,
+                -3170777096303105047L, -3256660348483802362L, -3338123885075135933L, -3415475560473298752L,
+                -3488994201966444258L, -3558932970354456420L, -3625522261068040742L, -3688972217741991689L,
+                -3749474917563779627L, -3807206277531072172L, -3862327722496826830L, -3914987649156779312L,
+                -3965322714631864882L, -4013458973776911635L, -4059512885612766613L, -4103592206186240662L,
+                -4145796782586127736L, -4186219260694346585L, -4224945717447274810L, -4262056226866285147L,
+                -4297625367836519229L, -4331722680528536958L, -4364413077437472159L, -4395757214229421760L,
+                -4425811824915119137L, -4454630025296932322L, -4482261588141294467L, -4508753193105275908L,
+                -4534148654077813412L, -4558489126279965349L, -4581813295192216486L, -4604157549138252679L,
+                -4625556137145250151L, -4646041313519109096L, -4665643470413305673L, -4684391259530342697L,
+                -4702311703971745066L, -4719430301145102986L, -4735771117539946027L, -4751356876102086987L,
+                -4766209036859150188L, -4780347871385996716L, -4793792531638885869L, -4806561113635132333L,
+                -4818670716409312334L, -4830137496634465358L, -4840976719260854030L, -4851202804490332239L,
+                -4860829371376476047L, -4869869278311650511L, -4878334660640770576L, -4886236965617426832L,
+                -4893586984900802224L, -4900394884772702384L, -4906670234238884945L, -4912422031164489009L,
+                -4917658726580135697L, -4922388247283531793L, -4926618016851042065L, -4930354975163351025L,
+                -4933605596540650674L, -4936375906575303186L, -4938671497741357106L, -4940497543854583186L,
+                -4941858813449628882L, -4942759682136114354L, -4943204143989086194L, -4943195822025527282L,
+                -4942737977813222130L, -4941833520255011698L, -4940485013586759090L, -4938694684624342322L,
+                -4936464429291795314L, -4933795818458824946L, -4930690103114057265L, -4927148218896863345L,
+                -4923170790008291569L, -4918758132519196401L, -4913910257091661489L, -4908626871126522161L,
+                -4902907380349538608L, -4896750889844272240L, -4890156204540530416L, -4883121829162570096L,
+                -4875645967641780528L, -4867726521994909999L, -4859361090668119087L, -4850546966345102383L,
+                -4841281133215538414L, -4831560263698491374L, -4821380714613452974L, -4810738522790065581L,
+                -4799629400105481389L, -4788048727936296621L, -4775991551010524588L, -4763452570642113772L,
+                -4750426137329493931L, -4736906242696388587L, -4722886510751367403L, -4708360188440104938L,
+                -4693320135461420394L, -4677758813316098089L, -4661668273553495721L, -4645040145179234152L,
+                -4627865621182771687L, -4610135444140936871L, -4591839890849352486L, -4572968755929944934L,
+                -4553511334358213029L, -4533456402849109028L, -4512792200036270244L, -4491506405372580067L,
+                -4469586116675401954L, -4447017826233099938L, -4423787395382284961L, -4399880027458416864L,
+                -4375280239014124063L, -4349971829190464606L, -4323937847117722654L, -4297160557210942813L,
+                -4269621402214950684L, -4241300963840750107L, -4212178920821854874L, -4182234004204445017L,
+                -4151443949668869272L, -4119785446662323159L, -4087234084103169942L, -4053764292396165205L,
+                -4019349281473092435L, -3983960974549686930L, -3947569937258414993L, -3910145301787337104L,
+                -3871654685619049615L, -3832064104425389837L, -3791337878631529676L, -3749438533114328651L,
+                -3706326689447979465L, -3661960950051859912L, -3616297773528542022L, -3569291340409179909L,
+                -3520893408440947267L, -3471053156460649921L, -3419717015797783872L, -3366828488034801534L,
+                -3312327947826461820L, -3256152429334023226L, -3198235394669709240L, -3138506482563174262L,
+                -3076891235255164340L, -3013310801389715890L, -2947681612411392816L, -2879915029671670702L,
+                -2809916959107519276L, -2737587429961855017L, -2662820133571332903L, -2585501917733374884L,
+                -2505512231579392929L, -2422722515205190175L, -2336995527534106140L, -2248184604988712345L,
+                -2156132842510782614L, -2060672187261016979L, -1961622433929380112L, -1858790108950090508L,
+                -1751967229002904073L, -1640929916937134981L, -1525436855617591297L, -1405227557075245821L,
+                -1280020420662651897L, -1149510549536605301L, -1013367289578706928L,  -871231448632089708L,
+                -722712146453677415L,  -567383236774421729L,  -404779231966956764L,  -234390647591531478L,
+                -55658667960121553L,   132030985907831093L,   329355128892817467L,   537061298001091010L,
+                755977262693561929L,   987022116608030929L,  1231219266829437401L,  1489711711346524770L,
+                1763780090187559275L,  2054864117341782772L,  2364588157623782527L,  2694791916990482441L,
+                3047567482883491349L,  3425304305830820514L,  3830744187097285423L,  4267048975685836605L,
+                4737884547990014029L,  5247525842199011422L,  5800989391535342064L,  6404202162993303300L,
+                7064218894258526746L,  7789505049452354354L,  8590309807749425484L,  7643763810684501605L,
+                8891950541491453167L,  5457384281016234818L,  9083704440929285914L,  7976211653914461751L,
+                8178631350487124609L,  2821287825726757492L,  6322989683301736617L,  4309503753387630347L,
+                4685170734960191673L,  8404845967535252693L,  7330522972447610419L,  1960945799077061994L,
+                4742910674644933674L,  -751799822533438695L,  7023456603742021660L,  3843116882594755262L,
+                3927231442413889375L, -9223372036854775807L, -9223372036854775807L, -9223372036854775807L };
+
+        static final byte[] exponentialAliasMap = {    // 256 entries
+                (byte)  0, (byte)  0, (byte)  1, (byte)235, (byte)  3, (byte)  4, (byte)  5, (byte)  0,
+                (byte)  0, (byte)  0, (byte)  0, (byte)  0, (byte)  0, (byte)  0, (byte)  0, (byte)  0,
+                (byte)  0, (byte)  0, (byte)  1, (byte)  1, (byte)  1, (byte)  1, (byte)  2, (byte)  2,
+                (byte)252, (byte)252, (byte)252, (byte)252, (byte)252, (byte)252, (byte)252, (byte)252,
+                (byte)252, (byte)252, (byte)252, (byte)252, (byte)252, (byte)252, (byte)252, (byte)252,
+                (byte)252, (byte)252, (byte)252, (byte)252, (byte)252, (byte)252, (byte)252, (byte)252,
+                (byte)252, (byte)252, (byte)252, (byte)252, (byte)252, (byte)252, (byte)252, (byte)252,
+                (byte)252, (byte)252, (byte)252, (byte)252, (byte)252, (byte)252, (byte)252, (byte)252,
+                (byte)252, (byte)252, (byte)252, (byte)252, (byte)252, (byte)252, (byte)252, (byte)252,
+                (byte)252, (byte)252, (byte)252, (byte)252, (byte)252, (byte)252, (byte)252, (byte)252,
+                (byte)252, (byte)252, (byte)252, (byte)252, (byte)252, (byte)252, (byte)252, (byte)252,
+                (byte)252, (byte)252, (byte)252, (byte)252, (byte)252, (byte)252, (byte)252, (byte)252,
+                (byte)252, (byte)252, (byte)252, (byte)252, (byte)252, (byte)252, (byte)252, (byte)252,
+                (byte)252, (byte)252, (byte)252, (byte)252, (byte)252, (byte)252, (byte)252, (byte)252,
+                (byte)252, (byte)252, (byte)252, (byte)252, (byte)252, (byte)252, (byte)252, (byte)252,
+                (byte)252, (byte)252, (byte)252, (byte)252, (byte)252, (byte)252, (byte)252, (byte)252,
+                (byte)252, (byte)252, (byte)252, (byte)252, (byte)252, (byte)252, (byte)252, (byte)252,
+                (byte)252, (byte)252, (byte)252, (byte)252, (byte)252, (byte)252, (byte)252, (byte)252,
+                (byte)252, (byte)252, (byte)252, (byte)252, (byte)252, (byte)252, (byte)252, (byte)252,
+                (byte)252, (byte)252, (byte)252, (byte)252, (byte)252, (byte)252, (byte)252, (byte)252,
+                (byte)252, (byte)252, (byte)252, (byte)252, (byte)252, (byte)252, (byte)252, (byte)252,
+                (byte)252, (byte)252, (byte)252, (byte)252, (byte)252, (byte)252, (byte)252, (byte)252,
+                (byte)252, (byte)251, (byte)251, (byte)251, (byte)251, (byte)251, (byte)251, (byte)251,
+                (byte)251, (byte)251, (byte)251, (byte)251, (byte)251, (byte)251, (byte)250, (byte)250,
+                (byte)250, (byte)250, (byte)250, (byte)250, (byte)250, (byte)249, (byte)249, (byte)249,
+                (byte)249, (byte)249, (byte)249, (byte)248, (byte)248, (byte)248, (byte)248, (byte)247,
+                (byte)247, (byte)247, (byte)247, (byte)246, (byte)246, (byte)246, (byte)245, (byte)245,
+                (byte)244, (byte)244, (byte)243, (byte)243, (byte)242, (byte)241, (byte)241, (byte)240,
+                (byte)239, (byte)237, (byte)  3, (byte)  3, (byte)  4, (byte)  4, (byte)  6, (byte)  0,
+                (byte)  0, (byte)  0, (byte)  0, (byte)236, (byte)237, (byte)238, (byte)239, (byte)240,
+                (byte)241, (byte)242, (byte)243, (byte)244, (byte)245, (byte)246, (byte)247, (byte)248,
+                (byte)249, (byte)250, (byte)251, (byte)252, (byte)  2, (byte)  0, (byte)  0, (byte)  0 };
+
+        // Implementation support for modified-ziggurat implementation of nextGaussian()
+
+        // Fraction of the area under the curve that lies outside the layer boxes: 0.0117
+        // Fraction of non-box area that lies in the tail of the distribution: 0.0236
+
+        static final int normalNumberOfLayers = 253;
+        static final int normalLayerMask = 0xff;
+        static final int normalAliasMask = 0xff;
+        static final int normalSignCorrectionMask = 0xff;
+        static final double normalX0 = 3.63600662550094578;
+        static final int normalInflectionIndex = 204;
+        static final long normalConvexMargin = 760463704284035183L;   // unscaled convex margin = 0.0824
+        static final long normalConcaveMargin = 2269182951627976012L;   // unscaled concave margin = 0.2460
+
+        // normal_X[i] = length of ziggurat layer i for normal distribution, scaled by 2**(-63)
+        static final double[] normalX = {      // 254 entries, which is normal_number_of_layers+1
+                3.9421662825398133e-19,  3.7204945004119012e-19,  3.5827024480628678e-19,  3.4807476236540249e-19,
+                3.3990177171882136e-19,  3.3303778360340139e-19,  3.2709438817617550e-19,  3.2183577132495100e-19,
+                3.1710758541840432e-19,  3.1280307407034065e-19,  3.0884520655804019e-19,  3.0517650624107352e-19,
+                3.0175290292584600e-19,  2.9853983440705320e-19,  2.9550967462801797e-19,  2.9263997988491663e-19,
+                2.8991225869977476e-19,  2.8731108780226291e-19,  2.8482346327101335e-19,  2.8243831535194389e-19,
+                2.8014613964727031e-19,  2.7793871261807797e-19,  2.7580886921411212e-19,  2.7375032698308758e-19,
+                2.7175754543391047e-19,  2.6982561247538484e-19,  2.6795015188771505e-19,  2.6612724730440033e-19,
+                2.6435337927976633e-19,  2.6262537282028438e-19,  2.6094035335224142e-19,  2.5929570954331002e-19,
+                2.5768906173214726e-19,  2.5611823497719608e-19,  2.5458123593393361e-19,  2.5307623292372459e-19,
+                2.5160153867798400e-19,  2.5015559533646191e-19,  2.4873696135403158e-19,  2.4734430003079206e-19,
+                2.4597636942892726e-19,  2.4463201347912450e-19,  2.4331015411139206e-19,  2.4200978427132955e-19,
+                2.4072996170445879e-19,  2.3946980340903347e-19,  2.3822848067252674e-19,  2.3700521461931801e-19,
+                2.3579927220741330e-19,  2.3460996262069972e-19,  2.3343663401054455e-19,  2.3227867054673840e-19,
+                2.3113548974303765e-19,  2.3000654002704238e-19,  2.2889129852797606e-19,  2.2778926905921897e-19,
+                2.2669998027527321e-19,  2.2562298398527416e-19,  2.2455785360727260e-19,  2.2350418274933911e-19,
+                2.2246158390513294e-19,  2.2142968725296249e-19,  2.2040813954857555e-19,  2.1939660310297601e-19,
+                2.1839475483749618e-19,  2.1740228540916853e-19,  2.1641889840016519e-19,  2.1544430956570613e-19,
+                2.1447824613540345e-19,  2.1352044616350571e-19,  2.1257065792395107e-19,  2.1162863934653125e-19,
+                2.1069415749082026e-19,  2.0976698805483467e-19,  2.0884691491567363e-19,  2.0793372969963634e-19,
+                2.0702723137954107e-19,  2.0612722589717129e-19,  2.0523352580895635e-19,  2.0434594995315797e-19,
+                2.0346432313698148e-19,  2.0258847584216418e-19,  2.0171824394771313e-19,  2.0085346846857531e-19,
+                1.9999399530912015e-19,  1.9913967503040585e-19,  1.9829036263028144e-19,  1.9744591733545175e-19,
+                1.9660620240469857e-19,  1.9577108494251485e-19,  1.9494043572246307e-19,  1.9411412901962161e-19,
+                1.9329204245152935e-19,  1.9247405682708168e-19,  1.9166005600287074e-19,  1.9084992674649826e-19,
+                1.9004355860642340e-19,  1.8924084378793725e-19,  1.8844167703488436e-19,  1.8764595551677749e-19,
+                1.8685357872097450e-19,  1.8606444834960934e-19,  1.8527846822098793e-19,  1.8449554417517928e-19,
+                1.8371558398354868e-19,  1.8293849726199566e-19,  1.8216419538767393e-19,  1.8139259141898448e-19,
+                1.8062360001864453e-19,  1.7985713737964743e-19,  1.7909312115393845e-19,  1.7833147038364200e-19,
+                1.7757210543468428e-19,  1.7681494793266395e-19,  1.7605992070083140e-19,  1.7530694770004409e-19,
+                1.7455595397057217e-19,  1.7380686557563475e-19,  1.7305960954655264e-19,  1.7231411382940904e-19,
+                1.7157030723311378e-19,  1.7082811937877138e-19,  1.7008748065025788e-19,  1.6934832214591352e-19,
+                1.6861057563126349e-19,  1.6787417349268046e-19,  1.6713904869190636e-19,  1.6640513472135291e-19,
+                1.6567236556010242e-19,  1.6494067563053266e-19,  1.6420999975549115e-19,  1.6348027311594532e-19,
+                1.6275143120903661e-19,  1.6202340980646725e-19,  1.6129614491314931e-19,  1.6056957272604589e-19,
+                1.5984362959313479e-19,  1.5911825197242491e-19,  1.5839337639095554e-19,  1.5766893940370800e-19,
+                1.5694487755235889e-19,  1.5622112732380261e-19,  1.5549762510837070e-19,  1.5477430715767271e-19,
+                1.5405110954198330e-19,  1.5332796810709688e-19,  1.5260481843056974e-19,  1.5188159577726683e-19,
+                1.5115823505412761e-19,  1.5043467076406199e-19,  1.4971083695888395e-19,  1.4898666719118714e-19,
+                1.4826209446506113e-19,  1.4753705118554365e-19,  1.4681146910669830e-19,  1.4608527927820112e-19,
+                1.4535841199031451e-19,  1.4463079671711862e-19,  1.4390236205786415e-19,  1.4317303567630177e-19,
+                1.4244274423783481e-19,  1.4171141334433217e-19,  1.4097896746642792e-19,  1.4024532987312287e-19,
+                1.3951042255849034e-19,  1.3877416616527576e-19,  1.3803647990516385e-19,  1.3729728147547174e-19,
+                1.3655648697200824e-19,  1.3581401079782068e-19,  1.3506976556752901e-19,  1.3432366200692418e-19,
+                1.3357560884748263e-19,  1.3282551271542047e-19,  1.3207327801488087e-19,  1.3131880680481524e-19,
+                1.3056199866908076e-19,  1.2980275057923788e-19,  1.2904095674948608e-19,  1.2827650848312727e-19,
+                1.2750929400989213e-19,  1.2673919831340482e-19,  1.2596610294799512e-19,  1.2518988584399374e-19,
+                1.2441042110056523e-19,  1.2362757876504165e-19,  1.2284122459762072e-19,  1.2205121982017852e-19,
+                1.2125742084782245e-19,  1.2045967900166973e-19,  1.1965784020118020e-19,  1.1885174463419555e-19,
+                1.1804122640264091e-19,  1.1722611314162064e-19,  1.1640622560939109e-19,  1.1558137724540874e-19,
+                1.1475137369333185e-19,  1.1391601228549047e-19,  1.1307508148492592e-19,  1.1222836028063025e-19,
+                1.1137561753107903e-19,  1.1051661125053526e-19,  1.0965108783189755e-19,  1.0877878119905372e-19,
+                1.0789941188076655e-19,  1.0701268599703640e-19,  1.0611829414763286e-19,  1.0521591019102928e-19,
+                1.0430518990027552e-19,  1.0338576948035472e-19,  1.0245726392923699e-19,  1.0151926522209310e-19,
+                1.0057134029488235e-19,  9.9613028799672809e-20,  9.8643840599459914e-20,  9.7663252964755816e-20,
+                9.6670707427623454e-20,  9.5665606240866670e-20,  9.4647308380433213e-20,  9.3615125017323508e-20,
+                9.2568314370887282e-20,  9.1506075837638774e-20,  9.0427543267725716e-20,  8.9331777233763680e-20,
+                8.8217756102327883e-20,  8.7084365674892319e-20,  8.5930387109612162e-20,  8.4754482764244349e-20,
+                8.3555179508462343e-20,  8.2330848933585364e-20,  8.1079683729129853e-20,  7.9799669284133864e-20,
+                7.8488549286072745e-20,  7.7143783700934692e-20,  7.5762496979467566e-20,  7.4341413578485329e-20,
+                7.2876776807378431e-20,  7.1364245443525374e-20,  6.9798760240761066e-20,  6.8174368944799054e-20,
+                6.6483992986198539e-20,  6.4719110345162767e-20,  6.2869314813103699e-20,  6.0921687548281263e-20,
+                5.8859873575576818e-20,  5.6662675116090981e-20,  5.4301813630894571e-20,  5.1738171744494220e-20,
+                4.8915031722398545e-20,  4.5744741890755301e-20,  4.2078802568583416e-20,  3.7625986722404761e-20,
+                3.1628589805881879e-20,  0.0000000000000000e+00 };
+
+        // normal_Y[i] = value of the normal distribution function at normal_X[i], scaled by 2**(-63)
+        static final double[] normalY = {      // 254 entries, which is normal_number_of_layers+1
+                1.4598410796619063e-22,  3.0066613427942797e-22,  4.6129728815103466e-22,  6.2663350049234362e-22,
+                7.9594524761881544e-22,  9.6874655021705039e-22,  1.1446877002379439e-21,  1.3235036304379167e-21,
+                1.5049857692053131e-21,  1.6889653000719298e-21,  1.8753025382711626e-21,  2.0638798423695191e-21,
+                2.2545966913644708e-21,  2.4473661518801799e-21,  2.6421122727763533e-21,  2.8387681187879908e-21,
+                3.0372742567457284e-21,  3.2375775699986589e-21,  3.4396303157948780e-21,  3.6433893657997798e-21,
+                3.8488155868912312e-21,  4.0558733309492775e-21,  4.2645300104283590e-21,  4.4747557422305067e-21,
+                4.6865230465355582e-21,  4.8998065902775257e-21,  5.1145829672105489e-21,  5.3308305082046173e-21,
+                5.5485291167031758e-21,  5.7676601252690476e-21,  5.9882061699178461e-21,  6.2101510795442221e-21,
+                6.4334797782257209e-21,  6.6581781985713897e-21,  6.8842332045893181e-21,  7.1116325227957095e-21,
+                7.3403646804903092e-21,  7.5704189502886418e-21,  7.8017853001379744e-21,  8.0344543481570017e-21,
+                8.2684173217333118e-21,  8.5036660203915022e-21,  8.7401927820109521e-21,  8.9779904520281901e-21,
+                9.2170523553061439e-21,  9.4573722703928820e-21,  9.6989444059269430e-21,  9.9417633789758424e-21,
+                1.0185824195119818e-20,  1.0431122230114770e-20,  1.0677653212987396e-20,  1.0925413210432004e-20,
+                1.1174398612392891e-20,  1.1424606118728715e-20,  1.1676032726866302e-20,  1.1928675720361027e-20,
+                1.2182532658289373e-20,  1.2437601365406785e-20,  1.2693879923010674e-20,  1.2951366660454145e-20,
+                1.3210060147261461e-20,  1.3469959185800733e-20,  1.3731062804473644e-20,  1.3993370251385596e-20,
+                1.4256880988463136e-20,  1.4521594685988369e-20,  1.4787511217522902e-20,  1.5054630655196170e-20,
+                1.5322953265335218e-20,  1.5592479504415048e-20,  1.5863210015310328e-20,  1.6135145623830982e-20,
+                1.6408287335525592e-20,  1.6682636332737932e-20,  1.6958193971903124e-20,  1.7234961781071113e-20,
+                1.7512941457646084e-20,  1.7792134866331487e-20,  1.8072544037271070e-20,  1.8354171164377277e-20,
+                1.8637018603838945e-20,  1.8921088872801004e-20,  1.9206384648209468e-20,  1.9492908765815636e-20,
+                1.9780664219333857e-20,  2.0069654159747839e-20,  2.0359881894760859e-20,  2.0651350888385696e-20,
+                2.0944064760670539e-20,  2.1238027287557466e-20,  2.1533242400870487e-20,  2.1829714188430474e-20,
+                2.2127446894294597e-20,  2.2426444919118270e-20,  2.2726712820637798e-20,  2.3028255314272276e-20,
+                2.3331077273843558e-20,  2.3635183732413286e-20,  2.3940579883236352e-20,  2.4247271080830277e-20,
+                2.4555262842160330e-20,  2.4864560847940368e-20,  2.5175170944049622e-20,  2.5487099143065929e-20,
+                2.5800351625915997e-20,  2.6114934743643687e-20,  2.6430855019297323e-20,  2.6748119149937411e-20,
+                2.7066734008766247e-20,  2.7386706647381193e-20,  2.7708044298153558e-20,  2.8030754376735269e-20,
+                2.8354844484695747e-20,  2.8680322412291631e-20,  2.9007196141372126e-20,  2.9335473848423219e-20,
+                2.9665163907753988e-20,  2.9996274894828624e-20,  3.0328815589748056e-20,  3.0662794980885287e-20,
+                3.0998222268678760e-20,  3.1335106869588609e-20,  3.1673458420220558e-20,  3.2013286781622988e-20,
+                3.2354602043762612e-20,  3.2697414530184806e-20,  3.3041734802864950e-20,  3.3387573667257349e-20,
+                3.3734942177548938e-20,  3.4083851642125208e-20,  3.4434313629256243e-20,  3.4786339973011376e-20,
+                3.5139942779411164e-20,  3.5495134432826171e-20,  3.5851927602632460e-20,  3.6210335250134172e-20,
+                3.6570370635764384e-20,  3.6932047326575882e-20,  3.7295379204034252e-20,  3.7660380472126401e-20,
+                3.8027065665798284e-20,  3.8395449659736649e-20,  3.8765547677510167e-20,  3.9137375301086406e-20,
+                3.9510948480742172e-20,  3.9886283545385430e-20,  4.0263397213308566e-20,  4.0642306603393541e-20,
+                4.1023029246790967e-20,  4.1405583099096438e-20,  4.1789986553048817e-20,  4.2176258451776819e-20,
+                4.2564418102621759e-20,  4.2954485291566197e-20,  4.3346480298300118e-20,  4.3740423911958146e-20,
+                4.4136337447563716e-20,  4.4534242763218286e-20,  4.4934162278076256e-20,  4.5336118991149025e-20,
+                4.5740136500984466e-20,  4.6146239026271279e-20,  4.6554451427421133e-20,  4.6964799229185088e-20,
+                4.7377308644364938e-20,  4.7792006598684169e-20,  4.8208920756888113e-20,  4.8628079550147814e-20,
+                4.9049512204847653e-20,  4.9473248772842596e-20,  4.9899320163277674e-20,  5.0327758176068971e-20,
+                5.0758595537153414e-20,  5.1191865935622696e-20,  5.1627604062866059e-20,  5.2065845653856416e-20,
+                5.2506627530725194e-20,  5.2949987648783448e-20,  5.3395965145159426e-20,  5.3844600390237576e-20,
+                5.4295935042099358e-20,  5.4750012104183868e-20,  5.5206875986405073e-20,  5.5666572569983821e-20,
+                5.6129149276275792e-20,  5.6594655139902476e-20,  5.7063140886520563e-20,  5.7534659015596918e-20,
+                5.8009263888591218e-20,  5.8487011822987583e-20,  5.8967961192659803e-20,  5.9452172535103471e-20,
+                5.9939708666122605e-20,  6.0430634802618929e-20,  6.0925018694200531e-20,  6.1422930764402860e-20,
+                6.1924444262401531e-20,  6.2429635426193939e-20,  6.2938583658336214e-20,  6.3451371715447563e-20,
+                6.3968085912834963e-20,  6.4488816345752736e-20,  6.5013657128995346e-20,  6.5542706656731714e-20,
+                6.6076067884730717e-20,  6.6613848637404196e-20,  6.7156161942412980e-20,  6.7703126395950580e-20,
+                6.8254866562246408e-20,  6.8811513411327825e-20,  6.9373204799659681e-20,  6.9940085998959109e-20,
+                7.0512310279279503e-20,  7.1090039553397167e-20,  7.1673445090644796e-20,  7.2262708309655784e-20,
+                7.2858021661057338e-20,  7.3459589613035800e-20,  7.4067629754967553e-20,  7.4682374037052817e-20,
+                7.5304070167226666e-20,  7.5932983190698547e-20,  7.6569397282483754e-20,  7.7213617789487678e-20,
+                7.7865973566417016e-20,  7.8526819659456755e-20,  7.9196540403850560e-20,  7.9875553017037968e-20,
+                8.0564311788901630e-20,  8.1263312996426176e-20,  8.1973100703706304e-20,  8.2694273652634034e-20,
+                8.3427493508836792e-20,  8.4173494807453416e-20,  8.4933097052832066e-20,  8.5707219578230905e-20,
+                8.6496899985930695e-20,  8.7303317295655327e-20,  8.8127821378859504e-20,  8.8971970928196666e-20,
+                8.9837583239314064e-20,  9.0726800697869543e-20,  9.1642181484063544e-20,  9.2586826406702765e-20,
+                9.3564561480278864e-20,  9.4580210012636175e-20,  9.5640015550850358e-20,  9.6752334770503130e-20,
+                9.7928851697808831e-20,  9.9186905857531331e-20,  1.0055456271343397e-19,  1.0208407377305566e-19,
+                1.0390360993240711e-19,  1.0842021724855044e-19 };
+
+        // alias_threshold[j] is a threshold for the probability mass function that has been
+        // scaled by (2**64 - 1), translated by -(2**63), and represented as a long value;
+        // in this way it can be directly compared to a randomly chosen long value.
+        static final long[] normalAliasThreshold = {    // 256 entries
+                9223372036854775732L,  1100243796470199922L,  7866600928967318259L,  6788754710669718688L,
+                9022865200207136940L,  6522434035182564354L,  4723064097388367094L,  3360495653202227820L,
+                2289663232347306830L,  1423968905585875379L,   708364817795238883L,   106102487338962592L,
+                -408333464668584328L,  -853239722790494085L, -1242095211827090004L, -1585059631108655444L,
+                -1889943050267333598L, -2162852901996526266L, -2408637386596951353L, -2631196530256993348L,
+                -2833704942542501760L, -3018774289008775598L, -3188573753501888049L, -3344920681670389334L,
+                -3489349705095933019L, -3623166100045386711L, -3747487436861293578L, -3863276422709141026L,
+                -3971367044055496571L, -4072485557008423504L, -4167267476835653997L, -4256271432259158584L,
+                -4339990541931699221L, -4418861817116128356L, -4493273980399812066L, -4563574004455583972L,
+                -4630072609765608272L, -4693048910437239656L, -4752754358851355990L, -4809416110064308151L,
+                -4863239903553549801L, -4914412541525462120L, -4963104028438393907L, -5009469424783376781L,
+                -5053650458852410933L, -5095776932714599237L, -5135967952538787362L, -5174333008440005397L,
+                -5210972924976812191L, -5245980700089102084L, -5279442247516610920L, -5311437055455710870L,
+                -5342038772315685218L, -5371315728848281940L, -5399331404596850615L, -5426144845492958401L,
+                -5451811038482575296L, -5476381248268660540L, -5499903320574200237L, -5522421955754019296L,
+                -5543978956088644891L, -5564613449670076120L, -5584362093426489951L, -5603259257517942559L,
+                -5621337193067953247L, -5638626184957155131L, -5655154691206501482L, -5670949470299055313L,
+                -5686035697633988263L, -5700437072176015065L, -5714175914241450413L, -5727273255262198220L,
+                -5739748920276454057L, -5751621603817308582L, -5762908939796390234L, -5773627565922293024L,
+                -5783793183134813122L, -5793420610488485693L, -5802523835876777512L, -5811116062947540603L,
+                -5819209754528321254L, -5826816672847738703L, -5833947916812588598L, -5840613956576464230L,
+                -5846824665611918318L, -5852589350480860931L, -5857916778478181241L, -5862815203308620040L,
+                -5867292388942958035L, -5871355631785040459L, -5875011781271709877L, -5878267259014830525L,
+                -5881128076587168793L, -5883599852042383670L, -5885687825255517495L, -5887396872158140520L,
+                -5888731517940791413L, -5889695949285098191L, -5890294025685452079L, -5890529289913339019L,
+                -5890404977673728891L, -5889924026498433105L, -5889089083917111413L, -5887902514943630556L,
+                -5886366408911444323L, -5884482585689698188L, -5882252601307215732L, -5879677753010810505L,
+                -5876759083779777633L, -5873497386319005871L, -5869893206546653493L, -5865946846595933526L,
+                -5861658367342436656L, -5857027590471882377L, -5852054100098427498L, -5846737243942430862L,
+                -5841076134076202917L, -5835069647242632620L, -5828716424752710909L, -5822014871963881822L,
+                -5814963157341321336L, -5807559211102860368L, -5799800723445392235L, -5791685142351319976L,
+                -5783209670970726741L, -5774371264573181466L, -5765166627063894671L, -5755592207054728713L,
+                -5745644193480823967L, -5735318510752045177L, -5724610813425415465L, -5713516480385581414L,
+                -5702030608515423737L, -5690148005840583288L, -5677863184127162093L, -5665170350911168791L,
+                -5652063400935782694L, -5638535906971010691L, -5624581109986711207L, -5610191908648783765L,
+                -5595360848105231304L, -5580080108024969737L, -5564341489852042876L, -5548136403231016978L,
+                -5531455851558564459L, -5514290416611714856L, -5496630242199355791L, -5478465016777918644L,
+                -5459783954970839371L, -5440575777921757436L, -5420828692410297267L, -5400530368650229789L,
+                -5379667916685479525L, -5358227861290596404L, -5336196115276119372L, -5313557951090901350L,
+                -5290297970603367798L, -5266400072934326313L, -5241847420204395031L, -5216622401044877639L,
+                -5190706591710560934L, -5164080714616987256L, -5136724594109421094L, -5108617109256031912L,
+                -5079736143434386281L, -5050058530465123570L, -5019559997019987907L, -4988215101007960589L,
+                -4955997165616088151L, -4922878208649305943L, -4888828866781574127L, -4853818314291958392L,
+                -4817814175818125756L, -4780782432613346925L, -4742687321741700014L, -4703491227589533028L,
+                -4663154565006030194L, -4621635653315226847L, -4578890580363657638L, -4534873055674290590L,
+                -4489534251682380820L, -4442822631912146606L, -4394683764829968681L, -4345060121963632469L,
+                -4293890858720706245L, -4241111576152819891L, -4186654061709945180L, -4130446006793453666L,
+                -4072410698652140640L, -4012466683862855933L, -3950527400292573339L, -3886500774045756804L,
+                -3820288777448438119L, -3751786943603804843L, -3680883832458819395L, -3607460442634330728L,
+                -3531389562479403081L, -3452535052892669800L, -3370751053387208615L, -3285881101636362572L,
+                -3197757155290696249L, -3106198503163967069L, -3011010550898974052L, -2911983463889090176L,
+                -2808890647471134035L, -2701487041141521265L, -2589507199668960785L, -2472663129352313038L,
+                -2350641842148622058L, -2223102583752258356L, -2089673683718520949L, -1949948966041670625L,
+                -1803483646850545328L, -1649789631543398131L, -1488330106106063370L, -1318513295716695859L,
+                -1139685236949889721L,  -951121376566993538L,  -752016768187462359L,  -541474585679321485L,
+                -318492605702529265L,   -81947227237782935L,   169425512586600501L,   437052607251310002L,
+                722551297576808029L,  1027761939321803391L,  1354787941562529921L,  1706044619231670700L,
+                2084319374410687061L,  2492846399585974279L,  2935400169364870493L,  3416413484632185639L,
+                3941127949845221101L,  4515787798750242711L,  5147892401460631081L,  5846529325404347588L,
+                6622819682189677227L,  7490522659877439279L,  8466869998300400224L,  8216968526327386835L,
+                4550693915429835301L,  7628019504075715697L,  6605080500885794707L,  7121156327618549405L,
+                2484871780310660533L,  7179104797025802172L,  7066086283790288107L,  1516500120772178463L,
+                216305945406470492L,  6295963418490399062L,  2889316805640753770L, -2712587580563247199L,
+                6562498853480442900L,  7975754821117214681L, -9223372036854775807L, -9223372036854775807L };
+
+        static final byte[] normalAliasMap = {    // 256 entries
+                (byte)  0, (byte)  0, (byte)239, (byte)  2, (byte)  0, (byte)  0, (byte)  0, (byte)  0,
+                (byte)  0, (byte)  0, (byte)  0, (byte)  0, (byte)  1, (byte)  1, (byte)  1, (byte)253,
+                (byte)253, (byte)253, (byte)253, (byte)253, (byte)253, (byte)253, (byte)253, (byte)253,
+                (byte)253, (byte)253, (byte)253, (byte)253, (byte)253, (byte)253, (byte)253, (byte)253,
+                (byte)253, (byte)253, (byte)253, (byte)253, (byte)253, (byte)253, (byte)253, (byte)253,
+                (byte)253, (byte)253, (byte)253, (byte)253, (byte)253, (byte)253, (byte)253, (byte)253,
+                (byte)253, (byte)253, (byte)253, (byte)253, (byte)253, (byte)253, (byte)253, (byte)253,
+                (byte)253, (byte)253, (byte)253, (byte)253, (byte)253, (byte)253, (byte)253, (byte)253,
+                (byte)253, (byte)253, (byte)253, (byte)253, (byte)253, (byte)253, (byte)253, (byte)253,
+                (byte)253, (byte)253, (byte)253, (byte)253, (byte)253, (byte)253, (byte)253, (byte)253,
+                (byte)253, (byte)253, (byte)253, (byte)253, (byte)253, (byte)253, (byte)253, (byte)253,
+                (byte)253, (byte)253, (byte)253, (byte)253, (byte)253, (byte)253, (byte)253, (byte)253,
+                (byte)253, (byte)253, (byte)253, (byte)253, (byte)253, (byte)253, (byte)253, (byte)253,
+                (byte)253, (byte)253, (byte)253, (byte)253, (byte)253, (byte)253, (byte)253, (byte)253,
+                (byte)253, (byte)253, (byte)253, (byte)253, (byte)253, (byte)253, (byte)253, (byte)253,
+                (byte)253, (byte)253, (byte)253, (byte)253, (byte)253, (byte)253, (byte)253, (byte)253,
+                (byte)253, (byte)253, (byte)253, (byte)253, (byte)253, (byte)253, (byte)253, (byte)253,
+                (byte)253, (byte)253, (byte)253, (byte)253, (byte)253, (byte)253, (byte)253, (byte)253,
+                (byte)253, (byte)253, (byte)253, (byte)253, (byte)253, (byte)253, (byte)253, (byte)253,
+                (byte)253, (byte)253, (byte)253, (byte)253, (byte)253, (byte)253, (byte)253, (byte)253,
+                (byte)253, (byte)253, (byte)253, (byte)253, (byte)253, (byte)253, (byte)253, (byte)253,
+                (byte)253, (byte)253, (byte)253, (byte)253, (byte)253, (byte)253, (byte)253, (byte)253,
+                (byte)253, (byte)253, (byte)253, (byte)253, (byte)253, (byte)253, (byte)253, (byte)253,
+                (byte)253, (byte)253, (byte)253, (byte)253, (byte)253, (byte)253, (byte)253, (byte)253,
+                (byte)253, (byte)253, (byte)252, (byte)252, (byte)252, (byte)252, (byte)252, (byte)252,
+                (byte)252, (byte)252, (byte)252, (byte)252, (byte)251, (byte)251, (byte)251, (byte)251,
+                (byte)251, (byte)251, (byte)251, (byte)250, (byte)250, (byte)250, (byte)250, (byte)250,
+                (byte)249, (byte)249, (byte)249, (byte)248, (byte)248, (byte)248, (byte)247, (byte)247,
+                (byte)247, (byte)246, (byte)246, (byte)245, (byte)244, (byte)244, (byte)243, (byte)242,
+                (byte)240, (byte)  2, (byte)  2, (byte)  3, (byte)  3, (byte)  0, (byte)  0, (byte)240,
+                (byte)241, (byte)242, (byte)243, (byte)244, (byte)245, (byte)246, (byte)247, (byte)248,
+                (byte)249, (byte)250, (byte)251, (byte)252, (byte)253, (byte)  1, (byte)  0, (byte)  0 };
+
+    }
+
+}
diff --git a/tests/test_data/std/jdk/internal/util/regex/Grapheme.class b/tests/test_data/std/jdk/internal/util/regex/Grapheme.class
new file mode 100644
index 0000000000000000000000000000000000000000..820dd1619a7323ae7590c40db3ae05e94fc2fcfe
GIT binary patch
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HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/util/regex/Grapheme.java b/tests/test_data/std/jdk/internal/util/regex/Grapheme.java
new file mode 100644
index 00000000..ef392612
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/util/regex/Grapheme.java
@@ -0,0 +1,332 @@
+/*
+ * Copyright (c) 2016, 2023, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package jdk.internal.util.regex;
+
+import java.util.Objects;
+
+public final class Grapheme {
+
+    /**
+     * Look for the next extended grapheme cluster boundary in a CharSequence.
+     * It assumes the start of the char sequence at offset {@code off} is a boundary.
+     * <p>
+     * See Unicode Standard Annex #29 Unicode Text Segmentation for the specification
+     * for the extended grapheme cluster boundary rules. The following implementation
+     * is based on the annex for Unicode version 15.1.
+     *
+     * @spec http://www.unicode.org/reports/tr29/tr29-43.html
+     * @param src the {@code CharSequence} to be scanned
+     * @param off offset to start looking for the next boundary in the src
+     * @param limit limit offset in the src (exclusive)
+     * @return the next grapheme boundary
+     */
+    public static int nextBoundary(CharSequence src, int off, int limit) {
+        Objects.checkFromToIndex(off, limit, src.length());
+
+        int ch0 = Character.codePointAt(src, off);
+        int ret = off + Character.charCount(ch0);
+        // indicates whether gb11 or gb12 is underway
+        int t0 = getType(ch0);
+        int riCount = t0 == RI ? 1 : 0;
+        boolean gb11 = t0 == EXTENDED_PICTOGRAPHIC;
+        while (ret < limit) {
+            int ch1 = Character.codePointAt(src, ret);
+            int t1 = getType(ch1);
+
+            // GB9c
+            if (IndicConjunctBreak.isConsonant(ch0)) {
+                var advance = checkIndicConjunctBreak(src, ret, limit);
+                if (advance >= 0) {
+                    ret += advance;
+                    continue;
+                }
+            }
+
+            if (gb11 && t0 == ZWJ && t1 == EXTENDED_PICTOGRAPHIC) {
+                // continue for gb11
+            } else if (riCount % 2 == 1 && t0 == RI && t1 == RI) {
+                // continue for gb12
+            } else if (rules[t0][t1]) {
+                if (ret > off) {
+                    break;
+                } else {
+                    gb11 = t1 == EXTENDED_PICTOGRAPHIC;
+                    riCount = 0;
+                }
+            }
+
+            riCount += (t1 == RI) ? 1 : 0;
+            ch0 = ch1;
+            t0 = t1;
+
+            ret += Character.charCount(ch1);
+        }
+        return ret;
+    }
+
+    // types
+    private static final int OTHER = 0;
+    private static final int CR = 1;
+    private static final int LF = 2;
+    private static final int CONTROL = 3;
+    private static final int EXTEND = 4;
+    private static final int ZWJ = 5;
+    private static final int RI = 6;
+    private static final int PREPEND = 7;
+    private static final int SPACINGMARK = 8;
+    private static final int L = 9;
+    private static final int V = 10;
+    private static final int T = 11;
+    private static final int LV = 12;
+    private static final int LVT = 13;
+    private static final int EXTENDED_PICTOGRAPHIC = 14;
+
+    private static final int FIRST_TYPE = 0;
+    private static final int LAST_TYPE = 14;
+
+    private static final boolean[][] rules;
+    static {
+        rules = new boolean[LAST_TYPE + 1][LAST_TYPE + 1];
+        // GB 999 Any + Any  -> default
+        for (int i = FIRST_TYPE; i <= LAST_TYPE; i++)
+            for (int j = FIRST_TYPE; j <= LAST_TYPE; j++)
+                rules[i][j] = true;
+        // GB 6 L x (L | V | LV | VT)
+        rules[L][L] = false;
+        rules[L][V] = false;
+        rules[L][LV] = false;
+        rules[L][LVT] = false;
+        // GB 7 (LV | V) x (V | T)
+        rules[LV][V] = false;
+        rules[LV][T] = false;
+        rules[V][V] = false;
+        rules[V][T] = false;
+        // GB 8 (LVT | T) x T
+        rules[LVT][T] = false;
+        rules[T][T] = false;
+        // GB 9 x (Extend|ZWJ)
+        // GB 9a x Spacing Mark
+        // GB 9b Prepend x
+        for (int i = FIRST_TYPE; i <= LAST_TYPE; i++) {
+            rules[i][EXTEND] = false;
+            rules[i][ZWJ] = false;
+            rules[i][SPACINGMARK] = false;
+            rules[PREPEND][i] = false;
+        }
+        // GB 4  (Control | CR | LF) +
+        // GB 5  + (Control | CR | LF)
+        for (int i = FIRST_TYPE; i <= LAST_TYPE; i++)
+            for (int j = CR; j <= CONTROL; j++) {
+                rules[i][j] = true;
+                rules[j][i] = true;
+            }
+        // GB 3 CR x LF
+        rules[CR][LF] = false;
+        // GB 11 Exended_Pictographic x (Extend|ZWJ)
+        rules[EXTENDED_PICTOGRAPHIC][EXTEND] = false;
+        rules[EXTENDED_PICTOGRAPHIC][ZWJ] = false;
+    }
+
+    // Hangul syllables
+    private static final int SYLLABLE_BASE = 0xAC00;
+    private static final int LCOUNT = 19;
+    private static final int VCOUNT = 21;
+    private static final int TCOUNT = 28;
+    private static final int NCOUNT = VCOUNT * TCOUNT; // 588
+    private static final int SCOUNT = LCOUNT * NCOUNT; // 11172
+
+    // #tr29: SpacingMark exceptions: The following (which have
+    // General_Category = Spacing_Mark and would otherwise be included)
+    // are specifically excluded
+    static boolean isExcludedSpacingMark(int cp) {
+       return  cp == 0x102B || cp == 0x102C || cp == 0x1038 ||
+               cp >= 0x1062 && cp <= 0x1064 ||
+               cp >= 0x1067 && cp <= 0x106D ||
+               cp == 0x1083 ||
+               cp >= 0x1087 && cp <= 0x108C ||
+               cp == 0x108F ||
+               cp >= 0x109A && cp <= 0x109C ||
+               cp == 0x1A61 || cp == 0x1A63 || cp == 0x1A64 ||
+               cp == 0xAA7B || cp == 0xAA7D;
+    }
+
+    @SuppressWarnings("fallthrough")
+    static int getType(int cp) {
+        if (cp < 0x007F) { // ASCII
+            if (cp < 32) { // Control characters
+                if (cp == 0x000D)
+                    return CR;
+                if (cp == 0x000A)
+                    return LF;
+                return CONTROL;
+            }
+            return OTHER;
+        }
+
+        if (Character.isExtendedPictographic(cp)) {
+            return EXTENDED_PICTOGRAPHIC;
+        }
+
+        int type = Character.getType(cp);
+        switch(type) {
+        case Character.UNASSIGNED:
+            // NOTE: #tr29 lists "Unassigned and Default_Ignorable_Code_Point" as Control
+            // but GraphemeBreakTest.txt lists u+0378/reserved-0378 as "Other"
+            // so type it as "Other" to make the test happy
+            if (cp == 0x0378)
+                return OTHER;
+
+        case Character.CONTROL:
+        case Character.LINE_SEPARATOR:
+        case Character.PARAGRAPH_SEPARATOR:
+        case Character.SURROGATE:
+            return CONTROL;
+        case Character.FORMAT:
+            if (cp == 0x200C ||
+                cp >= 0xE0020 && cp <= 0xE007F)
+                return EXTEND;
+            if (cp == 0x200D)
+                return ZWJ;
+            if (cp >= 0x0600 && cp <= 0x0605 ||
+                cp == 0x06DD || cp == 0x070F ||
+                cp == 0x0890 || cp == 0x0891 ||
+                cp == 0x08E2 || cp == 0x110BD || cp == 0x110CD)
+                return PREPEND;
+            return CONTROL;
+        case Character.NON_SPACING_MARK:
+        case Character.ENCLOSING_MARK:
+            // NOTE:
+            // #tr29 "plus a few General_Category = Spacing_Mark needed for
+            // canonical equivalence."
+            // but for "extended grapheme clusters" support, there is no
+            // need actually to diff "extend" and "spackmark" given GB9, GB9a
+            return EXTEND;
+        case  Character.COMBINING_SPACING_MARK:
+            if (isExcludedSpacingMark(cp))
+                return OTHER;
+            // NOTE:
+            // 0x11720 and 0x11721 are mentioned in #tr29 as
+            // OTHER_LETTER but it appears their category has been updated to
+            // COMBING_SPACING_MARK already (verified in ver.8)
+            return SPACINGMARK;
+        case Character.OTHER_SYMBOL:
+            if (cp >= 0x1F1E6 && cp <= 0x1F1FF)
+                return RI;
+            return OTHER;
+        case Character.MODIFIER_LETTER:
+        case Character.MODIFIER_SYMBOL:
+            // WARNING:
+            // not mentioned in #tr29 but listed in GraphemeBreakProperty.txt
+            if (cp == 0xFF9E || cp == 0xFF9F ||
+                cp >= 0x1F3FB && cp <= 0x1F3FF)
+                return EXTEND;
+            return OTHER;
+        case Character.OTHER_LETTER:
+            if (cp == 0x0E33 || cp == 0x0EB3)
+                return SPACINGMARK;
+            // hangul jamo
+            if (cp >= 0x1100 && cp <= 0x11FF) {
+                if (cp <= 0x115F)
+                    return L;
+                if (cp <= 0x11A7)
+                    return V;
+                return T;
+            }
+            // hangul syllables
+            int sindex = cp - SYLLABLE_BASE;
+            if (sindex >= 0 && sindex < SCOUNT) {
+
+                if (sindex % TCOUNT == 0)
+                    return LV;
+                return LVT;
+            }
+            //  hangul jamo_extended A
+            if (cp >= 0xA960 && cp <= 0xA97C)
+                return L;
+            //  hangul jamo_extended B
+            if (cp >= 0xD7B0 && cp <= 0xD7C6)
+                return V;
+            if (cp >= 0xD7CB && cp <= 0xD7FB)
+                return T;
+
+            // Prepend
+            switch (cp) {
+                case 0x0D4E:
+                case 0x111C2:
+                case 0x111C3:
+                case 0x1193F:
+                case 0x11941:
+                case 0x11A3A:
+                case 0x11A84:
+                case 0x11A85:
+                case 0x11A86:
+                case 0x11A87:
+                case 0x11A88:
+                case 0x11A89:
+                case 0x11D46:
+                case 0x11F02:
+                    return PREPEND;
+            }
+        }
+        return OTHER;
+    }
+
+    /**
+     * Checks for a possible GB9c Indic Conjunct Break sequence. If it is
+     * repetitive, e.g., Consonant1/Linker1/Consonant2/Linker2/Consonant3, only
+     * the first part of the sequence (Consonant1/Linker1/Consonant2) is
+     * recognized. The rest is analyzed in the next iteration of the grapheme
+     * cluster boundary search.
+     *
+     * @param src the source char sequence
+     * @param index the index that points to the starting Linking Consonant
+     * @param limit limit to the char sequence
+     * @return the advance in index if the indic conjunct break sequence
+     *      is found, it will be negative if the sequence is not found
+     */
+    private static int checkIndicConjunctBreak(CharSequence src, int index, int limit) {
+        boolean linkerFound = false;
+        int advance = 0;
+
+        while (index + advance < limit) {
+            int ch1 = Character.codePointAt(src, index + advance);
+            advance += Character.charCount(ch1);
+
+            if (IndicConjunctBreak.isLinker(ch1)) {
+                linkerFound = true;
+            } else if (IndicConjunctBreak.isConsonant(ch1)) {
+                if (linkerFound) {
+                    return advance;
+                } else {
+                    break;
+                }
+            } else if (!IndicConjunctBreak.isExtend(ch1)) {
+                break;
+            }
+        }
+        return -1;
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/util/regex/IndicConjunctBreak.class b/tests/test_data/std/jdk/internal/util/regex/IndicConjunctBreak.class
new file mode 100644
index 0000000000000000000000000000000000000000..ce576522f2f0cfe7869e9149c306a9765d7b6333
GIT binary patch
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zcAigkPp6_su~KoDLKJ%y`+)m~D|RT<-akw+La`axuu1WV;!(xpiYFA$DYhtHQ2Yzn
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/util/regex/IndicConjunctBreak.java b/tests/test_data/std/jdk/internal/util/regex/IndicConjunctBreak.java
new file mode 100644
index 00000000..be5cf6c5
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/util/regex/IndicConjunctBreak.java
@@ -0,0 +1,286 @@
+/*
+ * Copyright (c) 2023, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package jdk.internal.util.regex;
+
+/**
+ * Helper class for supporting the GB9c rule in Unicode Text Segmentation TR29
+ *
+ * <blockquote>
+ * GB9c Do not break within certain combinations with Indic_Conjunct_Break (InCB)=Linker.
+ *
+ * \p{InCB=Consonant} [ \p{InCB=Extend} \p{InCB=Linker} ]* \p{InCB=Linker} [ \p{InCB=Extend} \p{InCB=Linker} ]* x \p{InCB=Consonant}*
+ * </blockquote>
+ *
+ * Code point conditions included in this class are derived from the "Derived Property: Indic_Conjunct_Break"
+ * section in DerivedCoreProperties.txt of the Unicode Character Database.
+ */
+final class IndicConjunctBreak {
+    static boolean isLinker(int cp) {
+        return
+            cp == 0x094D ||
+            cp == 0x09CD ||
+            cp == 0x0ACD ||
+            cp == 0x0B4D ||
+            cp == 0x0C4D ||
+            cp == 0x0D4D;
+    }
+
+    static boolean isExtend(int cp) {
+        return
+           (cp >= 0x0300 && cp <= 0x034E) ||
+           (cp >= 0x0350 && cp <= 0x036F) ||
+           (cp >= 0x0483 && cp <= 0x0487) ||
+           (cp >= 0x0591 && cp <= 0x05BD) ||
+            cp == 0x05BF ||
+            cp == 0x05C1 ||
+            cp == 0x05C2 ||
+            cp == 0x05C4 ||
+            cp == 0x05C5 ||
+            cp == 0x05C7 ||
+           (cp >= 0x0610 && cp <= 0x061A) ||
+           (cp >= 0x064B && cp <= 0x065F) ||
+            cp == 0x0670 ||
+           (cp >= 0x06D6 && cp <= 0x06DC) ||
+           (cp >= 0x06DF && cp <= 0x06E4) ||
+            cp == 0x06E7 ||
+            cp == 0x06E8 ||
+           (cp >= 0x06EA && cp <= 0x06ED) ||
+            cp == 0x0711 ||
+           (cp >= 0x0730 && cp <= 0x074A) ||
+           (cp >= 0x07EB && cp <= 0x07F3) ||
+            cp == 0x07FD ||
+           (cp >= 0x0816 && cp <= 0x0819) ||
+           (cp >= 0x081B && cp <= 0x0823) ||
+           (cp >= 0x0825 && cp <= 0x0827) ||
+           (cp >= 0x0829 && cp <= 0x082D) ||
+           (cp >= 0x0859 && cp <= 0x085B) ||
+           (cp >= 0x0898 && cp <= 0x089F) ||
+           (cp >= 0x08CA && cp <= 0x08E1) ||
+           (cp >= 0x08E3 && cp <= 0x08FF) ||
+            cp == 0x093C ||
+           (cp >= 0x0951 && cp <= 0x0954) ||
+            cp == 0x09BC ||
+            cp == 0x09FE ||
+            cp == 0x0A3C ||
+            cp == 0x0ABC ||
+            cp == 0x0B3C ||
+            cp == 0x0C3C ||
+            cp == 0x0C55 ||
+            cp == 0x0C56 ||
+            cp == 0x0CBC ||
+            cp == 0x0D3B ||
+            cp == 0x0D3C ||
+           (cp >= 0x0E38 && cp <= 0x0E3A) ||
+           (cp >= 0x0E48 && cp <= 0x0E4B) ||
+           (cp >= 0x0EB8 && cp <= 0x0EBA) ||
+           (cp >= 0x0EC8 && cp <= 0x0ECB) ||
+            cp == 0x0F18 ||
+            cp == 0x0F19 ||
+            cp == 0x0F35 ||
+            cp == 0x0F37 ||
+            cp == 0x0F39 ||
+            cp == 0x0F71 ||
+            cp == 0x0F72 ||
+            cp == 0x0F74 ||
+           (cp >= 0x0F7A && cp <= 0x0F7D) ||
+            cp == 0x0F80 ||
+           (cp >= 0x0F82 && cp <= 0x0F84) ||
+            cp == 0x0F86 ||
+            cp == 0x0F87 ||
+            cp == 0x0FC6 ||
+            cp == 0x1037 ||
+            cp == 0x1039 ||
+            cp == 0x103A ||
+            cp == 0x108D ||
+           (cp >= 0x135D && cp <= 0x135F) ||
+            cp == 0x1714 ||
+            cp == 0x17D2 ||
+            cp == 0x17DD ||
+            cp == 0x18A9 ||
+           (cp >= 0x1939 && cp <= 0x193B) ||
+            cp == 0x1A17 ||
+            cp == 0x1A18 ||
+            cp == 0x1A60 ||
+           (cp >= 0x1A75 && cp <= 0x1A7C) ||
+            cp == 0x1A7F ||
+           (cp >= 0x1AB0 && cp <= 0x1ABD) ||
+           (cp >= 0x1ABF && cp <= 0x1ACE) ||
+            cp == 0x1B34 ||
+           (cp >= 0x1B6B && cp <= 0x1B73) ||
+            cp == 0x1BAB ||
+            cp == 0x1BE6 ||
+            cp == 0x1C37 ||
+           (cp >= 0x1CD0 && cp <= 0x1CD2) ||
+           (cp >= 0x1CD4 && cp <= 0x1CE0) ||
+           (cp >= 0x1CE2 && cp <= 0x1CE8) ||
+            cp == 0x1CED ||
+            cp == 0x1CF4 ||
+            cp == 0x1CF8 ||
+            cp == 0x1CF9 ||
+           (cp >= 0x1DC0 && cp <= 0x1DFF) ||
+            cp == 0x200D ||
+           (cp >= 0x20D0 && cp <= 0x20DC) ||
+            cp == 0x20E1 ||
+           (cp >= 0x20E5 && cp <= 0x20F0) ||
+           (cp >= 0x2CEF && cp <= 0x2CF1) ||
+            cp == 0x2D7F ||
+           (cp >= 0x2DE0 && cp <= 0x2DFF) ||
+           (cp >= 0x302A && cp <= 0x302F) ||
+            cp == 0x3099 ||
+            cp == 0x309A ||
+            cp == 0xA66F ||
+           (cp >= 0xA674 && cp <= 0xA67D) ||
+            cp == 0xA69E ||
+            cp == 0xA69F ||
+            cp == 0xA6F0 ||
+            cp == 0xA6F1 ||
+            cp == 0xA82C ||
+           (cp >= 0xA8E0 && cp <= 0xA8F1) ||
+           (cp >= 0xA92B && cp <= 0xA92D) ||
+            cp == 0xA9B3 ||
+            cp == 0xAAB0 ||
+           (cp >= 0xAAB2 && cp <= 0xAAB4) ||
+            cp == 0xAAB7 ||
+            cp == 0xAAB8 ||
+            cp == 0xAABE ||
+            cp == 0xAABF ||
+            cp == 0xAAC1 ||
+            cp == 0xAAF6 ||
+            cp == 0xABED ||
+            cp == 0xFB1E ||
+           (cp >= 0xFE20 && cp <= 0xFE2F) ||
+            cp == 0x101FD ||
+            cp == 0x102E0 ||
+           (cp >= 0x10376 && cp <= 0x1037A) ||
+            cp == 0x10A0D ||
+            cp == 0x10A0F ||
+           (cp >= 0x10A38 && cp <= 0x10A3A) ||
+            cp == 0x10A3F ||
+            cp == 0x10AE5 ||
+            cp == 0x10AE6 ||
+           (cp >= 0x10D24 && cp <= 0x10D27) ||
+            cp == 0x10EAB ||
+            cp == 0x10EAC ||
+           (cp >= 0x10EFD && cp <= 0x10EFF) ||
+           (cp >= 0x10F46 && cp <= 0x10F50) ||
+           (cp >= 0x10F82 && cp <= 0x10F85) ||
+            cp == 0x11070 ||
+            cp == 0x1107F ||
+            cp == 0x110BA ||
+           (cp >= 0x11100 && cp <= 0x11102) ||
+            cp == 0x11133 ||
+            cp == 0x11134 ||
+            cp == 0x11173 ||
+            cp == 0x111CA ||
+            cp == 0x11236 ||
+            cp == 0x112E9 ||
+            cp == 0x112EA ||
+            cp == 0x1133B ||
+            cp == 0x1133C ||
+           (cp >= 0x11366 && cp <= 0x1136C) ||
+           (cp >= 0x11370 && cp <= 0x11374) ||
+            cp == 0x11446 ||
+            cp == 0x1145E ||
+            cp == 0x114C3 ||
+            cp == 0x115C0 ||
+            cp == 0x116B7 ||
+            cp == 0x1172B ||
+            cp == 0x1183A ||
+            cp == 0x1193E ||
+            cp == 0x11943 ||
+            cp == 0x11A34 ||
+            cp == 0x11A47 ||
+            cp == 0x11A99 ||
+            cp == 0x11D42 ||
+            cp == 0x11D44 ||
+            cp == 0x11D45 ||
+            cp == 0x11D97 ||
+            cp == 0x11F42 ||
+           (cp >= 0x16AF0 && cp <= 0x16AF4) ||
+           (cp >= 0x16B30 && cp <= 0x16B36) ||
+            cp == 0x1BC9E ||
+            cp == 0x1D165 ||
+           (cp >= 0x1D167 && cp <= 0x1D169) ||
+           (cp >= 0x1D16E && cp <= 0x1D172) ||
+           (cp >= 0x1D17B && cp <= 0x1D182) ||
+           (cp >= 0x1D185 && cp <= 0x1D18B) ||
+           (cp >= 0x1D1AA && cp <= 0x1D1AD) ||
+           (cp >= 0x1D242 && cp <= 0x1D244) ||
+           (cp >= 0x1E000 && cp <= 0x1E006) ||
+           (cp >= 0x1E008 && cp <= 0x1E018) ||
+           (cp >= 0x1E01B && cp <= 0x1E021) ||
+            cp == 0x1E023 ||
+            cp == 0x1E024 ||
+           (cp >= 0x1E026 && cp <= 0x1E02A) ||
+            cp == 0x1E08F ||
+           (cp >= 0x1E130 && cp <= 0x1E136) ||
+            cp == 0x1E2AE ||
+           (cp >= 0x1E2EC && cp <= 0x1E2EF) ||
+           (cp >= 0x1E4EC && cp <= 0x1E4EF) ||
+           (cp >= 0x1E8D0 && cp <= 0x1E8D6) ||
+           (cp >= 0x1E944 && cp <= 0x1E94A);
+    }
+
+    static boolean isConsonant(int cp) {
+        // fast check - Devanagari to Malayalam
+        if (cp < 0x0900 || cp > 0x0D7F) {
+            return false;
+        }
+
+        return
+           (cp >= 0x0915 && cp <= 0x0939) ||
+           (cp >= 0x0958 && cp <= 0x095F) ||
+           (cp >= 0x0978 && cp <= 0x097F) ||
+           (cp >= 0x0995 && cp <= 0x09A8) ||
+           (cp >= 0x09AA && cp <= 0x09B0) ||
+            cp == 0x09B2 ||
+           (cp >= 0x09B6 && cp <= 0x09B9) ||
+            cp == 0x09DC ||
+            cp == 0x09DD ||
+            cp == 0x09DF ||
+            cp == 0x09F0 ||
+            cp == 0x09F1 ||
+           (cp >= 0x0A95 && cp <= 0x0AA8) ||
+           (cp >= 0x0AAA && cp <= 0x0AB0) ||
+            cp == 0x0AB2 ||
+            cp == 0x0AB3 ||
+           (cp >= 0x0AB5 && cp <= 0x0AB9) ||
+            cp == 0x0AF9 ||
+           (cp >= 0x0B15 && cp <= 0x0B28) ||
+           (cp >= 0x0B2A && cp <= 0x0B30) ||
+            cp == 0x0B32 ||
+            cp == 0x0B33 ||
+           (cp >= 0x0B35 && cp <= 0x0B39) ||
+            cp == 0x0B5C ||
+            cp == 0x0B5D ||
+            cp == 0x0B5F ||
+            cp == 0x0B71 ||
+           (cp >= 0x0C15 && cp <= 0x0C28) ||
+           (cp >= 0x0C2A && cp <= 0x0C39) ||
+           (cp >= 0x0C58 && cp <= 0x0C5A) ||
+           (cp >= 0x0D15 && cp <= 0x0D3A);
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/util/xml/PropertiesDefaultHandler.class b/tests/test_data/std/jdk/internal/util/xml/PropertiesDefaultHandler.class
new file mode 100644
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diff --git a/tests/test_data/std/jdk/internal/util/xml/PropertiesDefaultHandler.java b/tests/test_data/std/jdk/internal/util/xml/PropertiesDefaultHandler.java
new file mode 100644
index 00000000..2b2b5e66
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/util/xml/PropertiesDefaultHandler.java
@@ -0,0 +1,262 @@
+/*
+ * Copyright (c) 2012, 2020, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package jdk.internal.util.xml;
+
+import java.io.*;
+import java.nio.charset.Charset;
+import java.util.InvalidPropertiesFormatException;
+import java.util.Map.Entry;
+import java.util.Properties;
+import jdk.internal.org.xml.sax.Attributes;
+import jdk.internal.org.xml.sax.InputSource;
+import jdk.internal.org.xml.sax.SAXException;
+import jdk.internal.org.xml.sax.SAXParseException;
+import jdk.internal.org.xml.sax.helpers.DefaultHandler;
+import jdk.internal.util.xml.impl.SAXParserImpl;
+import jdk.internal.util.xml.impl.XMLStreamWriterImpl;
+
+/**
+ * A class used to aid in Properties load and save in XML. This class is
+ * re-implemented using a subset of SAX
+ *
+ * @author Joe Wang
+ * @since 1.8
+ */
+public class PropertiesDefaultHandler extends DefaultHandler {
+
+    // Elements specified in the properties.dtd
+    private static final String ELEMENT_ROOT = "properties";
+    private static final String ELEMENT_COMMENT = "comment";
+    private static final String ELEMENT_ENTRY = "entry";
+    private static final String ATTR_KEY = "key";
+    // The required DTD URI for exported properties
+    private static final String PROPS_DTD_DECL =
+        "<!DOCTYPE properties SYSTEM \"http://java.sun.com/dtd/properties.dtd\">";
+    private static final String PROPS_DTD_URI =
+        "http://java.sun.com/dtd/properties.dtd";
+    private static final String PROPS_DTD =
+        "<?xml version=\"1.0\" encoding=\"UTF-8\"?>"
+            + "<!-- DTD for properties -->"
+            + "<!ELEMENT properties ( comment?, entry* ) >"
+            + "<!ATTLIST properties"
+            + " version CDATA #FIXED \"1.0\">"
+            + "<!ELEMENT comment (#PCDATA) >"
+            + "<!ELEMENT entry (#PCDATA) >"
+            + "<!ATTLIST entry "
+            + " key CDATA #REQUIRED>";
+    /**
+     * Version number for the format of exported properties files.
+     */
+    private static final String EXTERNAL_XML_VERSION = "1.0";
+    private Properties properties;
+
+    public void load(Properties props, InputStream in)
+        throws IOException, InvalidPropertiesFormatException, UnsupportedEncodingException
+    {
+        this.properties = props;
+
+        try {
+            SAXParser parser = new SAXParserImpl();
+            parser.parse(in, this);
+        } catch (SAXException saxe) {
+            throw new InvalidPropertiesFormatException(saxe);
+        }
+
+        /**
+         * String xmlVersion = propertiesElement.getAttribute("version"); if
+         * (xmlVersion.compareTo(EXTERNAL_XML_VERSION) > 0) throw new
+         * InvalidPropertiesFormatException( "Exported Properties file format
+         * version " + xmlVersion + " is not supported. This java installation
+         * can read" + " versions " + EXTERNAL_XML_VERSION + " or older. You" +
+         * " may need to install a newer version of JDK.");
+         */
+    }
+
+    public void store(Properties props, OutputStream os, String comment, Charset charset)
+        throws IOException
+    {
+        try {
+            XMLStreamWriter writer = new XMLStreamWriterImpl(os, charset);
+            writer.writeStartDocument();
+            writer.writeDTD(PROPS_DTD_DECL);
+            writer.writeStartElement(ELEMENT_ROOT);
+            if (comment != null && !comment.isEmpty()) {
+                writer.writeStartElement(ELEMENT_COMMENT);
+                writer.writeCharacters(comment);
+                writer.writeEndElement();
+            }
+
+            synchronized(props) {
+                for (Entry<Object, Object> e : props.entrySet()) {
+                    final Object k = e.getKey();
+                    final Object v = e.getValue();
+                    if (k instanceof String && v instanceof String) {
+                        writer.writeStartElement(ELEMENT_ENTRY);
+                        writer.writeAttribute(ATTR_KEY, (String)k);
+                        writer.writeCharacters((String)v);
+                        writer.writeEndElement();
+                    } else {
+                        throw new ClassCastException(
+                                "Keys and values in Properties must be Strings");
+                    }
+                }
+            }
+
+            writer.writeEndElement();
+            writer.writeEndDocument();
+            writer.flush();
+        } catch (XMLStreamException e) {
+            if (e.getCause() instanceof UnsupportedEncodingException) {
+                throw (UnsupportedEncodingException) e.getCause();
+            }
+            throw new IOException(e);
+        }
+
+    }
+    //------------------------------------------------------------------
+    // Validate while parsing
+    //------------------------------------------------------------------
+    static final String ALLOWED_ELEMENTS = "comment, entry";
+    static final String ALLOWED_COMMENT = "comment";
+    //------------------------------------------------------------------
+    // Handler methods
+    //------------------------------------------------------------------
+    StringBuilder buf = new StringBuilder();
+    boolean sawRoot = false; // whether a valid root element exists
+    boolean sawComment = false;
+    boolean validEntry = false;
+    String key;
+    String rootElm;
+
+    @Override
+    public void startElement(String uri, String localName, String qName, Attributes attributes)
+        throws SAXException
+    {
+        if (sawRoot) {
+            if (!ALLOWED_ELEMENTS.contains(qName)) {
+                fatalError(new SAXParseException("Element type \"" + qName + "\" must be declared.", null));
+            }
+        } else {
+            // check whether the root has been declared in the DTD
+            if (rootElm == null) {
+                fatalError(new SAXParseException("An XML properties document must contain"
+                    + " the DOCTYPE declaration as defined by java.util.Properties.", null));
+            }
+
+            // check whether the element name matches the declaration
+            if (!rootElm.equals(qName)) {
+                fatalError(new SAXParseException("Document root element \"" + qName
+                    + "\", must match DOCTYPE root \"" + rootElm + "\"", null));
+            }
+
+            // this is a valid root element
+            sawRoot = true;
+        }
+
+        if (qName.equals(ELEMENT_ENTRY)) {
+            validEntry = true;
+            key = attributes.getValue(ATTR_KEY);
+            if (key == null) {
+                fatalError(new SAXParseException("Attribute \"key\" is required and " +
+                    "must be specified for element type \"entry\"", null));
+            }
+        } else if (qName.equals(ALLOWED_COMMENT)) {
+            if (sawComment) {
+                fatalError(new SAXParseException("Only one comment element may be allowed. "
+                    + "The content of element type \"properties\" must match \"(comment?,entry*)\"", null));
+            }
+            sawComment = true;
+        }
+    }
+
+    @Override
+    public void characters(char[] ch, int start, int length) throws SAXException {
+        if (validEntry) {
+            buf.append(ch, start, length);
+        }
+    }
+
+    @Override
+    public void endElement(String uri, String localName, String qName) throws SAXException {
+        if (!ALLOWED_ELEMENTS.contains(qName) && !ELEMENT_ROOT.equals(qName)) {
+            fatalError(new SAXParseException("Element: " + qName +
+                " is invalid, must match  \"(comment?,entry*)\".", null));
+        }
+
+        if (validEntry) {
+            properties.setProperty(key, buf.toString());
+            buf.delete(0, buf.length());
+            validEntry = false;
+        }
+    }
+
+    @Override
+    public InputSource resolveEntity(String pubid, String sysid)
+        throws SAXException, IOException {
+        {
+            if (sysid.equals(PROPS_DTD_URI)) {
+                // The properties DTD is known to the handler, no need to parse it
+                return null;
+            }
+            throw new SAXException("Invalid system identifier: " + sysid);
+        }
+    }
+
+    @Override
+    public void error(SAXParseException x) throws SAXException {
+        throw x;
+    }
+
+    @Override
+    public void fatalError(SAXParseException x) throws SAXException {
+        throw x;
+    }
+
+    @Override
+    public void warning(SAXParseException x) throws SAXException {
+        throw x;
+    }
+
+    // SAX2 extension from DTDHandler
+
+    @Override
+    public void startDTD (String name, String publicId, String systemId) throws SAXException
+    {
+        if (!ELEMENT_ROOT.equals(name) || !PROPS_DTD_URI.equals(systemId)) {
+            fatalError(new SAXParseException("An XML properties document must contain"
+                + " the DOCTYPE declaration as defined by java.util.Properties.", null));
+        }
+        rootElm = name;
+    }
+
+    @Override
+    public void startInternalSub () throws SAXException
+    {
+        fatalError(new SAXParseException("Internal DTD subset is not allowed. " +
+            "The Properties XML document must have the following DOCTYPE declaration: \n" +
+            PROPS_DTD_DECL, null));
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/util/xml/SAXParser.class b/tests/test_data/std/jdk/internal/util/xml/SAXParser.class
new file mode 100644
index 0000000000000000000000000000000000000000..f782678c411b50fac4ec97b37edbb86f8781bc94
GIT binary patch
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HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/util/xml/SAXParser.java b/tests/test_data/std/jdk/internal/util/xml/SAXParser.java
new file mode 100644
index 00000000..9e5c70dc
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/util/xml/SAXParser.java
@@ -0,0 +1,246 @@
+/*
+ * Copyright (c) 2012, 2022, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package jdk.internal.util.xml;
+
+import java.io.File;
+import java.io.IOException;
+import java.io.InputStream;
+import jdk.internal.org.xml.sax.InputSource;
+import jdk.internal.org.xml.sax.SAXException;
+import jdk.internal.org.xml.sax.XMLReader;
+import jdk.internal.org.xml.sax.helpers.DefaultHandler;
+
+
+/**
+ * Defines the API that wraps an {@link org.xml.sax.XMLReader}
+ * implementation class. In JAXP 1.0, this class wrapped the
+ * {@link org.xml.sax.Parser} interface, however this interface was
+ * replaced by the {@link org.xml.sax.XMLReader}. For ease
+ * of transition, this class continues to support the same name
+ * and interface as well as supporting new methods.
+ *
+ * An instance of this class can be obtained from the
+ * {@link javax.xml.parsers.SAXParserFactory#newSAXParser()} method.
+ * Once an instance of this class is obtained, XML can be parsed from
+ * a variety of input sources. These input sources are InputStreams,
+ * Files, URLs, and SAX InputSources.<p>
+ *
+ * This static method creates a new factory instance based
+ * on a system property setting or uses the platform default
+ * if no property has been defined.<p>
+ *
+ * The system property that controls which Factory implementation
+ * to create is named <code>&quot;javax.xml.parsers.SAXParserFactory&quot;</code>.
+ * This property names a class that is a concrete subclass of this
+ * abstract class. If no property is defined, a platform default
+ * will be used.</p>
+ *
+ * As the content is parsed by the underlying parser, methods of the
+ * given
+ * {@link org.xml.sax.helpers.DefaultHandler} are called.<p>
+ *
+ * Implementors of this class which wrap an underlying implementation
+ * can consider using the {@link org.xml.sax.helpers.ParserAdapter}
+ * class to initially adapt their SAX1 implementation to work under
+ * this revised class.
+ *
+ * @author <a href="mailto:Jeff.Suttor@Sun.com">Jeff Suttor</a>
+ * @version $Revision: 1.8 $, $Date: 2010-11-01 04:36:09 $
+ *
+ * @author Joe Wang
+ * This is a subset of that in JAXP, javax.xml.parsers.SAXParser
+ *
+ */
+public abstract class SAXParser {
+
+    /**
+     * <p>Protected constructor to prevent instantiation.</p>
+     */
+    protected SAXParser() {
+    }
+
+    /**
+     * Parse the content of the given {@link java.io.InputStream}
+     * instance as XML using the specified
+     * {@link org.xml.sax.helpers.DefaultHandler}.
+     *
+     * @param is InputStream containing the content to be parsed.
+     * @param dh The SAX DefaultHandler to use.
+     *
+     * @throws IllegalArgumentException If the given InputStream is null.
+     * @throws IOException If any IO errors occur.
+     * @throws SAXException If any SAX errors occur during processing.
+     *
+     * @see org.xml.sax.DocumentHandler
+     */
+    public void parse(InputStream is, DefaultHandler dh)
+        throws SAXException, IOException
+    {
+        if (is == null) {
+            throw new IllegalArgumentException("InputStream cannot be null");
+        }
+
+        InputSource input = new InputSource(is);
+        this.parse(input, dh);
+    }
+
+    /**
+     * Parse the content described by the giving Uniform Resource
+     * Identifier (URI) as XML using the specified
+     * {@link org.xml.sax.helpers.DefaultHandler}.
+     *
+     * @param uri The location of the content to be parsed.
+     * @param dh The SAX DefaultHandler to use.
+     *
+     * @throws IllegalArgumentException If the uri is null.
+     * @throws IOException If any IO errors occur.
+     * @throws SAXException If any SAX errors occur during processing.
+     *
+     * @see org.xml.sax.DocumentHandler
+     */
+    public void parse(String uri, DefaultHandler dh)
+        throws SAXException, IOException
+    {
+        if (uri == null) {
+            throw new IllegalArgumentException("uri cannot be null");
+        }
+
+        InputSource input = new InputSource(uri);
+        this.parse(input, dh);
+    }
+
+    /**
+     * Parse the content of the file specified as XML using the
+     * specified {@link org.xml.sax.helpers.DefaultHandler}.
+     *
+     * @param f The file containing the XML to parse
+     * @param dh The SAX DefaultHandler to use.
+     *
+     * @throws IllegalArgumentException If the File object is null.
+     * @throws IOException If any IO errors occur.
+     * @throws SAXException If any SAX errors occur during processing.
+     *
+     * @see org.xml.sax.DocumentHandler
+     */
+    public void parse(File f, DefaultHandler dh)
+        throws SAXException, IOException
+    {
+        if (f == null) {
+            throw new IllegalArgumentException("File cannot be null");
+        }
+
+        //convert file to appropriate URI, f.toURI().toASCIIString()
+        //converts the URI to string as per rule specified in
+        //RFC 2396,
+        InputSource input = new InputSource(f.toURI().toASCIIString());
+        this.parse(input, dh);
+    }
+
+    /**
+     * Parse the content given {@link org.xml.sax.InputSource}
+     * as XML using the specified
+     * {@link org.xml.sax.helpers.DefaultHandler}.
+     *
+     * @param is The InputSource containing the content to be parsed.
+     * @param dh The SAX DefaultHandler to use.
+     *
+     * @throws IllegalArgumentException If the <code>InputSource</code> object
+     *   is <code>null</code>.
+     * @throws IOException If any IO errors occur.
+     * @throws SAXException If any SAX errors occur during processing.
+     *
+     * @see org.xml.sax.DocumentHandler
+     */
+    public void parse(InputSource is, DefaultHandler dh)
+        throws SAXException, IOException
+    {
+        if (is == null) {
+            throw new IllegalArgumentException("InputSource cannot be null");
+        }
+
+        XMLReader reader = this.getXMLReader();
+        if (dh != null) {
+            reader.setContentHandler(dh);
+            reader.setEntityResolver(dh);
+            reader.setErrorHandler(dh);
+            reader.setDTDHandler(dh);
+        }
+        reader.parse(is);
+    }
+
+    /**
+     * Returns the {@link org.xml.sax.XMLReader} that is encapsulated by the
+     * implementation of this class.
+     *
+     * @return The XMLReader that is encapsulated by the
+     *         implementation of this class.
+     *
+     * @throws SAXException If any SAX errors occur during processing.
+     */
+    public abstract XMLReader getXMLReader() throws SAXException;
+
+    /**
+     * Indicates whether or not this parser is configured to
+     * understand namespaces.
+     *
+     * @return true if this parser is configured to
+     *         understand namespaces; false otherwise.
+     */
+    public abstract boolean isNamespaceAware();
+
+    /**
+     * Indicates whether or not this parser is configured to
+     * validate XML documents.
+     *
+     * @return true if this parser is configured to
+     *         validate XML documents; false otherwise.
+     */
+    public abstract boolean isValidating();
+
+    /**
+     * <p>Get the XInclude processing mode for this parser.</p>
+     *
+     * @return
+     *      the return value of
+     *      the {@link SAXParserFactory#isXIncludeAware()}
+     *      when this parser was created from factory.
+     *
+     * @throws UnsupportedOperationException When implementation does not
+     *   override this method
+     *
+     * @since 1.5
+     *
+     * @see SAXParserFactory#setXIncludeAware(boolean)
+     */
+    public boolean isXIncludeAware() {
+        throw new UnsupportedOperationException(
+                "This parser does not support specification \""
+                + this.getClass().getPackage().getSpecificationTitle()
+                + "\" version \""
+                + this.getClass().getPackage().getSpecificationVersion()
+                + "\"");
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/util/xml/XMLStreamException.class b/tests/test_data/std/jdk/internal/util/xml/XMLStreamException.class
new file mode 100644
index 0000000000000000000000000000000000000000..1d8c366a2611b131eca07ef7fd72bef0b3d27c62
GIT binary patch
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/util/xml/XMLStreamException.java b/tests/test_data/std/jdk/internal/util/xml/XMLStreamException.java
new file mode 100644
index 00000000..17ac20f2
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/util/xml/XMLStreamException.java
@@ -0,0 +1,91 @@
+/*
+ * Copyright (c) 2012, 2019, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package jdk.internal.util.xml;
+
+/**
+ * A copy of the StAX XMLStreamException without Location support
+ *
+ * The base exception for unexpected processing errors.  This Exception
+ * class is used to report well-formedness errors as well as unexpected
+ * processing conditions.
+ * @version 1.0
+ * @author Copyright (c) 2009 by Oracle Corporation. All Rights Reserved.
+ * @since 1.6
+ */
+
+public class XMLStreamException extends Exception {
+    @java.io.Serial
+    private static final long serialVersionUID = 1L;
+
+
+    protected Throwable nested;
+
+    /**
+     * Default constructor
+     */
+    public XMLStreamException() {
+        super();
+    }
+
+    /**
+     * Construct an exception with the associated message.
+     *
+     * @param msg the message to report
+     */
+    public XMLStreamException(String msg) {
+        super(msg);
+    }
+
+    /**
+     * Construct an exception with the associated exception
+     *
+     * @param th a nested exception
+     */
+    public XMLStreamException(Throwable th) {
+        super(th);
+        nested = th;
+    }
+
+    /**
+     * Construct an exception with the associated message and exception
+     *
+     * @param th a nested exception
+     * @param msg the message to report
+     */
+    public XMLStreamException(String msg, Throwable th) {
+        super(msg, th);
+        nested = th;
+    }
+
+    /**
+     * Gets the nested exception.
+     *
+     * @return Nested exception
+     */
+    public Throwable getNestedException() {
+        return nested;
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/util/xml/XMLStreamWriter.class b/tests/test_data/std/jdk/internal/util/xml/XMLStreamWriter.class
new file mode 100644
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GIT binary patch
literal 1032
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zH8_awo0djLfmSq)bu6F=nx9Y#ON3Xh;8nu3V^k|<7;fSgDQ^?X(EmCycM{B9+?&zd
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/util/xml/XMLStreamWriter.java b/tests/test_data/std/jdk/internal/util/xml/XMLStreamWriter.java
new file mode 100644
index 00000000..dd6e2ebd
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/util/xml/XMLStreamWriter.java
@@ -0,0 +1,158 @@
+/*
+ * Copyright (c) 2012, 2017, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package jdk.internal.util.xml;
+
+import java.nio.charset.Charset;
+import java.nio.charset.StandardCharsets;
+
+/**
+ * Basic XMLStreamWriter for writing simple XML files such as those
+ * defined in java.util.Properties
+ *
+ * This is a subset of javax.xml.stream.XMLStreamWriter
+ *
+ * @author Joe Wang
+ */
+public  interface XMLStreamWriter {
+
+    //Defaults the XML version to 1.0, and the encoding to utf-8
+    public static final String DEFAULT_XML_VERSION = "1.0";
+    public static final String DEFAULT_ENCODING = "UTF-8";
+    public static final Charset DEFAULT_CHARSET = StandardCharsets.UTF_8;
+
+    /**
+     * Writes a start tag to the output.  All writeStartElement methods
+     * open a new scope in the internal namespace context.  Writing the
+     * corresponding EndElement causes the scope to be closed.
+     * @param localName local name of the tag, may not be null
+     * @throws XMLStreamException
+     */
+    public void writeStartElement(String localName) throws XMLStreamException;
+
+    /**
+     * Writes an empty element tag to the output
+     * @param localName local name of the tag, may not be null
+     * @throws XMLStreamException
+     */
+    public void writeEmptyElement(String localName) throws XMLStreamException;
+
+    /**
+     * Writes an end tag to the output relying on the internal
+     * state of the writer to determine the prefix and local name
+     * of the event.
+     * @throws XMLStreamException
+     */
+    public void writeEndElement() throws XMLStreamException;
+
+    /**
+     * Closes any start tags and writes corresponding end tags.
+     * @throws XMLStreamException
+     */
+    public void writeEndDocument() throws XMLStreamException;
+
+    /**
+     * Close this writer and free any resources associated with the
+     * writer.  This must not close the underlying output stream.
+     * @throws XMLStreamException
+     */
+    public void close() throws XMLStreamException;
+
+    /**
+     * Write any cached data to the underlying output mechanism.
+     * @throws XMLStreamException
+     */
+    public void flush() throws XMLStreamException;
+
+    /**
+     * Writes an attribute to the output stream without
+     * a prefix.
+     * @param localName the local name of the attribute
+     * @param value the value of the attribute
+     * @throws IllegalStateException if the current state does not allow Attribute writing
+     * @throws XMLStreamException
+     */
+    public void writeAttribute(String localName, String value)
+            throws XMLStreamException;
+
+    /**
+     * Writes a CData section
+     * @param data the data contained in the CData Section, may not be null
+     * @throws XMLStreamException
+     */
+    public void writeCData(String data) throws XMLStreamException;
+
+    /**
+     * Write a DTD section.  This string represents the entire doctypedecl production
+     * from the XML 1.0 specification.
+     *
+     * @param dtd the DTD to be written
+     * @throws XMLStreamException
+     */
+    public void writeDTD(String dtd) throws XMLStreamException;
+
+    /**
+     * Write the XML Declaration. Defaults the XML version to 1.0, and the encoding to utf-8
+     * @throws XMLStreamException
+     */
+    public void writeStartDocument() throws XMLStreamException;
+
+    /**
+     * Write the XML Declaration. Defaults the encoding to utf-8
+     * @param version version of the xml document
+     * @throws XMLStreamException
+     */
+    public void writeStartDocument(String version) throws XMLStreamException;
+
+    /**
+     * Write the XML Declaration.  Note that the encoding parameter does
+     * not set the actual encoding of the underlying output.  That must
+     * be set when the instance of the XMLStreamWriter is created using the
+     * XMLOutputFactory
+     * @param encoding encoding of the xml declaration
+     * @param version version of the xml document
+     * @throws XMLStreamException If given encoding does not match encoding
+     * of the underlying stream
+     */
+    public void writeStartDocument(String encoding, String version)
+        throws XMLStreamException;
+
+    /**
+     * Write text to the output
+     * @param text the value to write
+     * @throws XMLStreamException
+     */
+    public void writeCharacters(String text) throws XMLStreamException;
+
+    /**
+     * Write text to the output
+     * @param text the value to write
+     * @param start the starting position in the array
+     * @param len the number of characters to write
+     * @throws XMLStreamException
+     */
+    public void writeCharacters(char[] text, int start, int len)
+        throws XMLStreamException;
+}
diff --git a/tests/test_data/std/jdk/internal/util/xml/impl/Attrs.class b/tests/test_data/std/jdk/internal/util/xml/impl/Attrs.class
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diff --git a/tests/test_data/std/jdk/internal/util/xml/impl/Attrs.java b/tests/test_data/std/jdk/internal/util/xml/impl/Attrs.java
new file mode 100644
index 00000000..15cbf1c6
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/util/xml/impl/Attrs.java
@@ -0,0 +1,426 @@
+/*
+ * Copyright (c) 2012, 2023, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package jdk.internal.util.xml.impl;
+
+import jdk.internal.org.xml.sax.Attributes;
+
+public class Attrs implements Attributes {
+
+    /**
+     * Attributes string array. Each individual attribute is represented by four
+     * strings: namespace URL(+0), qname(+1), local name(+2), value(+3),
+     * type(+4), declared["d"] and default["D"](+5). In order to find attribute
+     * by the attribute index, the attribute index MUST be multiplied by 8. The
+     * result will point to the attribute namespace URL.
+     */
+    /* pkg */ String[] mItems;
+    /**
+     * Number of attributes in the attributes string array.
+     */
+    private char mLength;
+
+    /**
+     * Constructor.
+     */
+    public Attrs() {
+        //              The default number of attributes capacity is 8.
+        mItems = new String[(8 << 3)];
+    }
+
+    /**
+     * Sets up the number of attributes and ensure the capacity of the attribute
+     * string array.
+     *
+     * @param length The number of attributes in the object.
+     */
+    public void setLength(char length) {
+        if (length > ((char) (mItems.length >> 3))) {
+            mItems = new String[length << 3];
+        }
+        mLength = length;
+    }
+
+    /**
+     * Return the number of attributes in the list.
+     *
+     * <p>Once you know the number of attributes, you can iterate through the
+     * list.</p>
+     *
+     * @return The number of attributes in the list.
+     * @see #getURI(int)
+     * @see #getLocalName(int)
+     * @see #getQName(int)
+     * @see #getType(int)
+     * @see #getValue(int)
+     */
+    public int getLength() {
+        return mLength;
+    }
+
+    /**
+     * Look up an attribute's Namespace URI by index.
+     *
+     * @param index The attribute index (zero-based).
+     * @return The Namespace URI, or the empty string if none is available, or
+     * null if the index is out of range.
+     * @see #getLength
+     */
+    public String getURI(int index) {
+        return ((index >= 0) && (index < mLength))
+                ? (mItems[index << 3])
+                : null;
+    }
+
+    /**
+     * Look up an attribute's local name by index.
+     *
+     * @param index The attribute index (zero-based).
+     * @return The local name, or the empty string if Namespace processing is
+     * not being performed, or null if the index is out of range.
+     * @see #getLength
+     */
+    public String getLocalName(int index) {
+        return ((index >= 0) && (index < mLength))
+                ? (mItems[(index << 3) + 2])
+                : null;
+    }
+
+    /**
+     * Look up an attribute's XML 1.0 qualified name by index.
+     *
+     * @param index The attribute index (zero-based).
+     * @return The XML 1.0 qualified name, or the empty string if none is
+     * available, or null if the index is out of range.
+     * @see #getLength
+     */
+    public String getQName(int index) {
+        if ((index < 0) || (index >= mLength)) {
+            return null;
+        }
+        return mItems[(index << 3) + 1];
+    }
+
+    /**
+     * Look up an attribute's type by index.
+     *
+     * <p>The attribute type is one of the strings "CDATA", "ID", "IDREF",
+     * "IDREFS", "NMTOKEN", "NMTOKENS", "ENTITY", "ENTITIES", or "NOTATION"
+     * (always in upper case).</p>
+     *
+     * <p>If the parser has not read a declaration for the attribute, or if the
+     * parser does not report attribute types, then it must return the value
+     * "CDATA" as stated in the XML 1.0 Recommendation (clause 3.3.3,
+     * "Attribute-Value Normalization").</p>
+     *
+     * <p>For an enumerated attribute that is not a notation, the parser will
+     * report the type as "NMTOKEN".</p>
+     *
+     * @param index The attribute index (zero-based).
+     * @return The attribute's type as a string, or null if the index is out of
+     * range.
+     * @see #getLength
+     */
+    public String getType(int index) {
+        return ((index >= 0) && (index < (mItems.length >> 3)))
+                ? (mItems[(index << 3) + 4])
+                : null;
+    }
+
+    /**
+     * Look up an attribute's value by index.
+     *
+     * <p>If the attribute value is a list of tokens (IDREFS, ENTITIES, or
+     * NMTOKENS), the tokens will be concatenated into a single string with each
+     * token separated by a single space.</p>
+     *
+     * @param index The attribute index (zero-based).
+     * @return The attribute's value as a string, or null if the index is out of
+     * range.
+     * @see #getLength
+     */
+    public String getValue(int index) {
+        return ((index >= 0) && (index < mLength))
+                ? (mItems[(index << 3) + 3])
+                : null;
+    }
+
+    /**
+     * Look up the index of an attribute by Namespace name.
+     *
+     * @param uri The Namespace URI, or the empty string if the name has no
+     * Namespace URI.
+     * @param localName The attribute's local name.
+     * @return The index of the attribute, or -1 if it does not appear in the
+     * list.
+     */
+    public int getIndex(String uri, String localName) {
+        char len = mLength;
+        for (char idx = 0; idx < len; idx++) {
+            if ((mItems[idx << 3]).equals(uri)
+                    && mItems[(idx << 3) + 2].equals(localName)) {
+                return idx;
+            }
+        }
+        return -1;
+    }
+
+    /**
+     * Look up the index of an attribute by Namespace name.
+     *
+     * @param uri The Namespace URI, or the empty string if the name has no
+     * Namespace URI. <code>null</code> value enforce the search by the local
+     * name only.
+     * @param localName The attribute's local name.
+     * @return The index of the attribute, or -1 if it does not appear in the
+     * list.
+     */
+    /* pkg */ int getIndexNullNS(String uri, String localName) {
+        char len = mLength;
+        if (uri != null) {
+            for (char idx = 0; idx < len; idx++) {
+                if ((mItems[idx << 3]).equals(uri)
+                        && mItems[(idx << 3) + 2].equals(localName)) {
+                    return idx;
+                }
+            }
+        } else {
+            for (char idx = 0; idx < len; idx++) {
+                if (mItems[(idx << 3) + 2].equals(localName)) {
+                    return idx;
+                }
+            }
+        }
+        return -1;
+    }
+
+    /**
+     * Look up the index of an attribute by XML 1.0 qualified name.
+     *
+     * @param qName The qualified (prefixed) name.
+     * @return The index of the attribute, or -1 if it does not appear in the
+     * list.
+     */
+    public int getIndex(String qName) {
+        char len = mLength;
+        for (char idx = 0; idx < len; idx++) {
+            if (mItems[(idx << 3) + 1].equals(qName)) {
+                return idx;
+            }
+        }
+        return -1;
+    }
+
+    /**
+     * Look up an attribute's type by Namespace name.
+     *
+     * <p>See {@link #getType(int) getType(int)} for a description of the
+     * possible types.</p>
+     *
+     * @param uri The Namespace URI, or the empty String if the name has no
+     * Namespace URI.
+     * @param localName The local name of the attribute.
+     * @return The attribute type as a string, or null if the attribute is not
+     * in the list or if Namespace processing is not being performed.
+     */
+    public String getType(String uri, String localName) {
+        int idx = getIndex(uri, localName);
+        return (idx >= 0) ? (mItems[(idx << 3) + 4]) : null;
+    }
+
+    /**
+     * Look up an attribute's type by XML 1.0 qualified name.
+     *
+     * <p>See {@link #getType(int) getType(int)} for a description of the
+     * possible types.</p>
+     *
+     * @param qName The XML 1.0 qualified name.
+     * @return The attribute type as a string, or null if the attribute is not
+     * in the list or if qualified names are not available.
+     */
+    public String getType(String qName) {
+        int idx = getIndex(qName);
+        return (idx >= 0) ? (mItems[(idx << 3) + 4]) : null;
+    }
+
+    /**
+     * Look up an attribute's value by Namespace name.
+     *
+     * <p>See {@link #getValue(int) getValue(int)} for a description of the
+     * possible values.</p>
+     *
+     * @param uri The Namespace URI, or the empty String if the name has no
+     * Namespace URI.
+     * @param localName The local name of the attribute.
+     * @return The attribute value as a string, or null if the attribute is not
+     * in the list.
+     */
+    public String getValue(String uri, String localName) {
+        int idx = getIndex(uri, localName);
+        return (idx >= 0) ? (mItems[(idx << 3) + 3]) : null;
+    }
+
+    /**
+     * Look up an attribute's value by XML 1.0 qualified name.
+     *
+     * <p>See {@link #getValue(int) getValue(int)} for a description of the
+     * possible values.</p>
+     *
+     * @param qName The XML 1.0 qualified name.
+     * @return The attribute value as a string, or null if the attribute is not
+     * in the list or if qualified names are not available.
+     */
+    public String getValue(String qName) {
+        int idx = getIndex(qName);
+        return (idx >= 0) ? (mItems[(idx << 3) + 3]) : null;
+    }
+
+    /**
+     * Returns false unless the attribute was declared in the DTD. This helps
+     * distinguish two kinds of attributes that SAX reports as CDATA: ones that
+     * were declared (and hence are usually valid), and those that were not (and
+     * which are never valid).
+     *
+     * @param index The attribute index (zero-based).
+     * @return true if the attribute was declared in the DTD, false otherwise.
+     * @exception java.lang.ArrayIndexOutOfBoundsException When the supplied
+     * index does not identify an attribute.
+     */
+    public boolean isDeclared(int index) {
+        if ((index < 0) || (index >= mLength)) {
+            throw new ArrayIndexOutOfBoundsException("");
+        }
+
+        return ((mItems[(index << 3) + 5]) != null);
+    }
+
+    /**
+     * Returns false unless the attribute was declared in the DTD. This helps
+     * distinguish two kinds of attributes that SAX reports as CDATA: ones that
+     * were declared (and hence are usually valid), and those that were not (and
+     * which are never valid).
+     *
+     * @param qName The XML qualified (prefixed) name.
+     * @return true if the attribute was declared in the DTD, false otherwise.
+     * @exception java.lang.IllegalArgumentException When the supplied name does
+     * not identify an attribute.
+     */
+    public boolean isDeclared(String qName) {
+        int idx = getIndex(qName);
+        if (idx < 0) {
+            throw new IllegalArgumentException("");
+        }
+
+        return ((mItems[(idx << 3) + 5]) != null);
+    }
+
+    /**
+     * Returns false unless the attribute was declared in the DTD. This helps
+     * distinguish two kinds of attributes that SAX reports as CDATA: ones that
+     * were declared (and hence are usually valid), and those that were not (and
+     * which are never valid).
+     *
+     * <p>Remember that since DTDs do not "understand" namespaces, the namespace
+     * URI associated with an attribute may not have come from the DTD. The
+     * declaration will have applied to the attribute's <em>qName</em>.
+     *
+     * @param uri The Namespace URI, or the empty string if the name has no
+     * Namespace URI.
+     * @param localName The attribute's local name.
+     * @return true if the attribute was declared in the DTD, false otherwise.
+     * @exception java.lang.IllegalArgumentException When the supplied names do
+     * not identify an attribute.
+     */
+    public boolean isDeclared(String uri, String localName) {
+        int idx = getIndex(uri, localName);
+        if (idx < 0) {
+            throw new IllegalArgumentException("");
+        }
+
+        return ((mItems[(idx << 3) + 5]) != null);
+    }
+
+    /**
+     * Returns true unless the attribute value was provided by DTD defaulting.
+     *
+     * @param index The attribute index (zero-based).
+     * @return true if the value was found in the XML text, false if the value
+     * was provided by DTD defaulting.
+     * @exception java.lang.ArrayIndexOutOfBoundsException When the supplied
+     * index does not identify an attribute.
+     */
+    public boolean isSpecified(int index) {
+        if ((index < 0) || (index >= mLength)) {
+            throw new ArrayIndexOutOfBoundsException("");
+        }
+
+        String str = mItems[(index << 3) + 5];
+        return ((str != null) ? (str.charAt(0) == 'd') : true);
+    }
+
+    /**
+     * Returns true unless the attribute value was provided by DTD defaulting.
+     *
+     * <p>Remember that since DTDs do not "understand" namespaces, the namespace
+     * URI associated with an attribute may not have come from the DTD. The
+     * declaration will have applied to the attribute's <em>qName</em>.
+     *
+     * @param uri The Namespace URI, or the empty string if the name has no
+     * Namespace URI.
+     * @param localName The attribute's local name.
+     * @return true if the value was found in the XML text, false if the value
+     * was provided by DTD defaulting.
+     * @exception java.lang.IllegalArgumentException When the supplied names do
+     * not identify an attribute.
+     */
+    public boolean isSpecified(String uri, String localName) {
+        int idx = getIndex(uri, localName);
+        if (idx < 0) {
+            throw new IllegalArgumentException("");
+        }
+
+        String str = mItems[(idx << 3) + 5];
+        return ((str != null) ? (str.charAt(0) == 'd') : true);
+    }
+
+    /**
+     * Returns true unless the attribute value was provided by DTD defaulting.
+     *
+     * @param qName The XML qualified (prefixed) name.
+     * @return true if the value was found in the XML text, false if the value
+     * was provided by DTD defaulting.
+     * @exception java.lang.IllegalArgumentException When the supplied name does
+     * not identify an attribute.
+     */
+    public boolean isSpecified(String qName) {
+        int idx = getIndex(qName);
+        if (idx < 0) {
+            throw new IllegalArgumentException("");
+        }
+
+        String str = mItems[(idx << 3) + 5];
+        return ((str != null) ? (str.charAt(0) == 'd') : true);
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/util/xml/impl/Input.class b/tests/test_data/std/jdk/internal/util/xml/impl/Input.class
new file mode 100644
index 0000000000000000000000000000000000000000..baa9164d2ba4577dda24b3190f1b4a8a5f2aede0
GIT binary patch
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/util/xml/impl/Input.java b/tests/test_data/std/jdk/internal/util/xml/impl/Input.java
new file mode 100644
index 00000000..e15b01d6
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/util/xml/impl/Input.java
@@ -0,0 +1,83 @@
+/*
+ * Copyright (c) 2012, 2022, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package jdk.internal.util.xml.impl;
+
+import java.io.Reader;
+
+/**
+ * A parsed entity input state.
+ *
+ * This class represents a parsed entity input state. The parser uses
+ * an instance of this class to manage input.
+ */
+
+public class Input {
+
+    /** The entity public identifier or null. */
+    public String pubid;
+    /** The entity system identifier or null. */
+    public String sysid;
+    /** The encoding from XML declaration or null */
+    public String xmlenc;
+    /** The XML version from XML declaration or 0x0000 */
+    public char xmlver;
+    /** The entity reader. */
+    public Reader src;
+    /** The character buffer. */
+    public char[] chars;
+    /** The length of the character buffer. */
+    public int chLen;
+    /** The index of the next character to read. */
+    public int chIdx;
+    /** The next input in a chain. */
+    public Input next;
+
+    /**
+     * Constructor.
+     *
+     * @param buffsize The input buffer size.
+     */
+    public Input(int buffsize) {
+        chars = new char[buffsize];
+        chLen = chars.length;
+    }
+
+    /**
+     * Constructor.
+     *
+     * @param buff The input buffer.
+     */
+    public Input(char[] buff) {
+        chars = buff;
+        chLen = chars.length;
+    }
+
+    /**
+     * Constructor.
+     */
+    public Input() {
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/util/xml/impl/Pair.class b/tests/test_data/std/jdk/internal/util/xml/impl/Pair.class
new file mode 100644
index 0000000000000000000000000000000000000000..b69a0d2c3927bebc8c191e5bcc6df75157037a69
GIT binary patch
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/util/xml/impl/Pair.java b/tests/test_data/std/jdk/internal/util/xml/impl/Pair.java
new file mode 100644
index 00000000..1b99751f
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/util/xml/impl/Pair.java
@@ -0,0 +1,122 @@
+/*
+ * Copyright (c) 2012, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package jdk.internal.util.xml.impl;
+
+
+/**
+ * A name with value pair.
+ *
+ * This class keeps name with value pair with additional information and
+ * supports pair chaining.
+ */
+public class Pair {
+
+    /** The pair name. */
+    public String name;
+    /** The pair value. */
+    public String value;
+    /** The pair numeric value. */
+    public int num;
+    /** The characters of name. */
+    public char[] chars;
+    /** The pair identifier. */
+    public int id;
+    /** The list of associated pairs. */
+    public Pair list;
+    /** The next pair in a chain. */
+    public Pair next;
+
+    /**
+     * Creates a qualified name string from qualified name.
+     *
+     * @return The qualified name string.
+     */
+    public String qname() {
+        return new String(chars, 1, chars.length - 1);
+    }
+
+    /**
+     * Creates a local name string from qualified name.
+     *
+     * @return The local name string.
+     */
+    public String local() {
+        if (chars[0] != 0) {
+            return new String(chars, chars[0] + 1, chars.length - chars[0] - 1);
+        }
+        return new String(chars, 1, chars.length - 1);
+    }
+
+    /**
+     * Creates a prefix string from qualified name.
+     *
+     * @return The prefix string.
+     */
+    public String pref() {
+        if (chars[0] != 0) {
+            return new String(chars, 1, chars[0] - 1);
+        }
+        return "";
+    }
+
+    /**
+     * Compares two qualified name prefixes.
+     *
+     * @param qname A qualified name.
+     * @return true if prefixes are equal.
+     */
+    public boolean eqpref(char[] qname) {
+        if (chars[0] == qname[0]) {
+            char len = chars[0];
+            for (char i = 1; i < len; i += 1) {
+                if (chars[i] != qname[i]) {
+                    return false;
+                }
+            }
+            return true;
+        }
+        return false;
+    }
+
+    /**
+     * Compares two qualified names.
+     *
+     * @param qname A qualified name.
+     * @return true if qualified names are equal.
+     */
+    public boolean eqname(char[] qname) {
+        char len = (char) chars.length;
+        if (len == qname.length) {
+            for (char i = 0; i < len; i += 1) {
+                if (chars[i] != qname[i]) {
+                    return false;
+                }
+            }
+            return true;
+        }
+        return false;
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/util/xml/impl/Parser.class b/tests/test_data/std/jdk/internal/util/xml/impl/Parser.class
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HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/util/xml/impl/Parser.java b/tests/test_data/std/jdk/internal/util/xml/impl/Parser.java
new file mode 100644
index 00000000..29acaefb
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/util/xml/impl/Parser.java
@@ -0,0 +1,3454 @@
+/*
+ * Copyright (c) 2012, 2023, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package jdk.internal.util.xml.impl;
+
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.InputStreamReader;
+import java.io.Reader;
+import java.io.UnsupportedEncodingException;
+import java.util.Arrays;
+import java.util.HashMap;
+import java.util.Locale;
+import java.util.Map;
+import jdk.internal.org.xml.sax.InputSource;
+import jdk.internal.org.xml.sax.SAXException;
+
+/**
+ * XML non-validating parser engine.
+ */
+public abstract class Parser {
+
+    public static final String FAULT = "";
+    protected static final int BUFFSIZE_READER = 512;
+    // Initial buffer (mBuff) size
+    protected static final int BUFFSIZE_PARSER = 128;
+    // Max buffer size
+    private static final int MAX_ARRAY_SIZE = 1024 << 16;
+
+    /**
+     * The end of stream character.
+     */
+    public static final char EOS = 0xffff;
+    private Pair mNoNS; // there is no namespace
+    private Pair mXml;  // the xml namespace
+    private Map<String, Input> mEnt;  // the entities look up table
+    private Map<String, Input> mPEnt; // the parameter entities look up table
+    protected boolean mIsSAlone;     // xml decl standalone flag
+    protected boolean mIsSAloneSet;  // standalone is explicitly set
+    protected boolean mIsNSAware;    // if true - namespace aware mode
+    protected int mPh;  // current phase of document processing
+    protected static final int PH_BEFORE_DOC = -1;  // before parsing
+    protected static final int PH_DOC_START = 0;   // document start
+    protected static final int PH_MISC_DTD = 1;   // misc before DTD
+    protected static final int PH_DTD = 2;   // DTD
+    protected static final int PH_DTD_MISC = 3;   // misc after DTD
+    protected static final int PH_DOCELM = 4;   // document's element
+    protected static final int PH_DOCELM_MISC = 5;   // misc after element
+    protected static final int PH_AFTER_DOC = 6;   // after parsing
+    protected int mEvt;  // current event type
+    protected static final int EV_NULL = 0;   // unknown
+    protected static final int EV_ELM = 1;   // empty element
+    protected static final int EV_ELMS = 2;   // start element
+    protected static final int EV_ELME = 3;   // end element
+    protected static final int EV_TEXT = 4;   // textual content
+    protected static final int EV_WSPC = 5;   // white space content
+    protected static final int EV_PI = 6;   // processing instruction
+    protected static final int EV_CDAT = 7;   // character data
+    protected static final int EV_COMM = 8;   // comment
+    protected static final int EV_DTD = 9;   // document type definition
+    protected static final int EV_ENT = 10;  // skipped entity
+    private char mESt; // built-in entity recognizer state
+    // mESt values:
+    //   0x100   : the initial state
+    //   > 0x100 : unrecognized name
+    //   < 0x100 : replacement character
+    protected char[] mBuff;       // parser buffer
+    protected int mBuffIdx;    // index of the last char
+    protected Pair mPref;       // stack of prefixes
+    protected Pair mElm;        // stack of elements
+    // mAttL.chars - element qname
+    // mAttL.next  - next element
+    // mAttL.list  - list of attributes defined on this element
+    // mAttL.list.chars - attribute qname
+    // mAttL.list.id    - a char representing attribute's type see below
+    // mAttL.list.next  - next attribute defined on the element
+    // mAttL.list.list  - devault value structure or null
+    // mAttL.list.list.chars - "name='value' " chars array for Input
+    //
+    // Attribute type character values:
+    // 'i' - "ID"
+    // 'r' - "IDREF"
+    // 'R' - "IDREFS"
+    // 'n' - "ENTITY"
+    // 'N' - "ENTITIES"
+    // 't' - "NMTOKEN"
+    // 'T' - "NMTOKENS"
+    // 'u' - enumeration type
+    // 'o' - "NOTATION"
+    // 'c' - "CDATA"
+    // see also: bkeyword() and atype()
+    //
+    protected Pair mAttL;       // list of defined attrs by element name
+    protected Input mDoc;        // document entity
+    protected Input mInp;        // stack of entities
+    private char[] mChars;      // reading buffer
+    private int mChLen;      // current capacity
+    private int mChIdx;      // index to the next char
+    protected Attrs mAttrs;      // attributes of the curr. element
+    private String[] mItems;      // attributes array of the curr. element
+    private char mAttrIdx;    // attributes counter/index
+    private String mUnent;  // unresolved entity name
+    private Pair mDltd;   // deleted objects for reuse
+    /**
+     * Default prefixes
+     */
+    private static final char NONS[];
+    private static final char XML[];
+    private static final char XMLNS[];
+
+    static {
+        NONS = new char[1];
+        NONS[0] = (char) 0;
+
+        XML = new char[4];
+        XML[0] = (char) 4;
+        XML[1] = 'x';
+        XML[2] = 'm';
+        XML[3] = 'l';
+
+        XMLNS = new char[6];
+        XMLNS[0] = (char) 6;
+        XMLNS[1] = 'x';
+        XMLNS[2] = 'm';
+        XMLNS[3] = 'l';
+        XMLNS[4] = 'n';
+        XMLNS[5] = 's';
+    }
+    /**
+     * ASCII character type array.
+     *
+     * This array maps an ASCII (7 bit) character to the character type.<br>
+     * Possible character type values are:<br> - ' ' for any kind of white
+     * space character;<br> - 'a' for any lower case alphabetical character
+     * value;<br> - 'A' for any upper case alphabetical character value;<br>
+     * - 'd' for any decimal digit character value;<br> - 'z' for any
+     * character less than ' ' except '\t', '\n', '\r';<br> An ASCII (7 bit)
+     * character which does not fall in any category listed above is mapped to
+     * it self.
+     */
+    private static final byte asctyp[];
+    /**
+     * NMTOKEN character type array.
+     *
+     * This array maps an ASCII (7 bit) character to the character type.<br>
+     * Possible character type values are:<br> - 0 for underscore ('_') or any
+     * lower and upper case alphabetical character value;<br> - 1 for colon
+     * (':') character;<br> - 2 for dash ('-') and dot ('.') or any decimal
+     * digit character value;<br> - 3 for any kind of white space character<br>
+     * An ASCII (7 bit) character which does not fall in any category listed
+     * above is mapped to 0xff.
+     */
+    private static final byte nmttyp[];
+
+    /**
+     * Static constructor.
+     *
+     * Sets up the ASCII character type array which is used by
+     * {@link #asctyp asctyp} method and NMTOKEN character type array.
+     */
+    static {
+        short i = 0;
+
+        asctyp = new byte[0x80];
+        while (i < ' ') {
+            asctyp[i++] = (byte) 'z';
+        }
+        asctyp['\t'] = (byte) ' ';
+        asctyp['\r'] = (byte) ' ';
+        asctyp['\n'] = (byte) ' ';
+        while (i < '0') {
+            asctyp[i] = (byte) i++;
+        }
+        while (i <= '9') {
+            asctyp[i++] = (byte) 'd';
+        }
+        while (i < 'A') {
+            asctyp[i] = (byte) i++;
+        }
+        while (i <= 'Z') {
+            asctyp[i++] = (byte) 'A';
+        }
+        while (i < 'a') {
+            asctyp[i] = (byte) i++;
+        }
+        while (i <= 'z') {
+            asctyp[i++] = (byte) 'a';
+        }
+        while (i < 0x80) {
+            asctyp[i] = (byte) i++;
+        }
+
+        nmttyp = new byte[0x80];
+        for (i = 0; i < '0'; i++) {
+            nmttyp[i] = (byte) 0xff;
+        }
+        while (i <= '9') {
+            nmttyp[i++] = (byte) 2;  // digits
+        }
+        while (i < 'A') {
+            nmttyp[i++] = (byte) 0xff;
+        }
+        // skipped upper case alphabetical character are already 0
+        for (i = '['; i < 'a'; i++) {
+            nmttyp[i] = (byte) 0xff;
+        }
+        // skipped lower case alphabetical character are already 0
+        for (i = '{'; i < 0x80; i++) {
+            nmttyp[i] = (byte) 0xff;
+        }
+        nmttyp['_'] = 0;
+        nmttyp[':'] = 1;
+        nmttyp['.'] = 2;
+        nmttyp['-'] = 2;
+        nmttyp[' '] = 3;
+        nmttyp['\t'] = 3;
+        nmttyp['\r'] = 3;
+        nmttyp['\n'] = 3;
+    }
+
+    /**
+     * Constructor.
+     */
+    @SuppressWarnings("this-escape")
+    protected Parser() {
+        mPh = PH_BEFORE_DOC;  // before parsing
+
+        //              Initialize the parser
+        mBuff = new char[BUFFSIZE_PARSER];
+        mAttrs = new Attrs();
+
+        //              Default namespace
+        mPref = pair(mPref);
+        mPref.name = "";
+        mPref.value = "";
+        mPref.chars = NONS;
+        mNoNS = mPref;  // no namespace
+        //              XML namespace
+        mPref = pair(mPref);
+        mPref.name = "xml";
+        mPref.value = "http://www.w3.org/XML/1998/namespace";
+        mPref.chars = XML;
+        mXml = mPref;  // XML namespace
+    }
+
+    /**
+     * Initializes parser's internals. Note, current input has to be set before
+     * this method is called.
+     */
+    protected void init() {
+        mUnent = null;
+        mElm = null;
+        mPref = mXml;
+        mAttL = null;
+        mPEnt = new HashMap<>();
+        mEnt = new HashMap<>();
+        mDoc = mInp;          // current input is document entity
+        mChars = mInp.chars;    // use document entity buffer
+        mPh = PH_DOC_START;  // the beginning of the document
+    }
+
+    /**
+     * Cleans up parser internal resources.
+     */
+    protected void cleanup() {
+        //              Default attributes
+        while (mAttL != null) {
+            while (mAttL.list != null) {
+                if (mAttL.list.list != null) {
+                    del(mAttL.list.list);
+                }
+                mAttL.list = del(mAttL.list);
+            }
+            mAttL = del(mAttL);
+        }
+        //              Element stack
+        while (mElm != null) {
+            mElm = del(mElm);
+        }
+        //              Namespace prefixes
+        while (mPref != mXml) {
+            mPref = del(mPref);
+        }
+        //              Inputs
+        while (mInp != null) {
+            pop();
+        }
+        //              Document reader
+        if ((mDoc != null) && (mDoc.src != null)) {
+            try {
+                mDoc.src.close();
+            } catch (IOException ioe) {
+            }
+        }
+        mPEnt = null;
+        mEnt = null;
+        mDoc = null;
+        mPh = PH_AFTER_DOC;  // before document processing
+    }
+
+    /**
+     * Processes a portion of document. This method returns one of EV_*
+     * constants as an identifier of the portion of document have been read.
+     *
+     * @return Identifier of processed document portion.
+     * @exception Exception is parser specific exception form panic method.
+     * @exception IOException
+     */
+    @SuppressWarnings("fallthrough")
+    protected int step() throws Exception {
+        mEvt = EV_NULL;
+        int st = 0;
+        while (mEvt == EV_NULL) {
+            char ch = (mChIdx < mChLen) ? mChars[mChIdx++] : getch();
+            switch (st) {
+                case 0:     // all sorts of markup (dispetcher)
+                    if (ch != '<') {
+                        bkch();
+                        mBuffIdx = -1;  // clean parser buffer
+                        st = 1;
+                        break;
+                    }
+                    switch (getch()) {
+                        case '/':  // the end of the element content
+                            mEvt = EV_ELME;
+                            if (mElm == null) {
+                                panic(FAULT);
+                            }
+                            //          Check element's open/close tags balance
+                            mBuffIdx = -1;  // clean parser buffer
+                            bname(mIsNSAware);
+                            char[] chars = mElm.chars;
+                            if (chars.length == (mBuffIdx + 1)) {
+                                for (char i = 1; i <= mBuffIdx; i += 1) {
+                                    if (chars[i] != mBuff[i]) {
+                                        panic(FAULT);
+                                    }
+                                }
+                            } else {
+                                panic(FAULT);
+                            }
+                            //          Skip white spaces before '>'
+                            if (wsskip() != '>') {
+                                panic(FAULT);
+                            }
+                            getch();  // read '>'
+                            break;
+
+                        case '!':  // a comment or a CDATA
+                            ch = getch();
+                            bkch();
+                            switch (ch) {
+                                case '-':  // must be a comment
+                                    mEvt = EV_COMM;
+                                    comm();
+                                    break;
+
+                                case '[':  // must be a CDATA section
+                                    mEvt = EV_CDAT;
+                                    cdat();
+                                    break;
+
+                                default:   // must be 'DOCTYPE'
+                                    mEvt = EV_DTD;
+                                    dtd();
+                                    break;
+                            }
+                            break;
+
+                        case '?':  // processing instruction
+                            mEvt = EV_PI;
+                            pi();
+                            break;
+
+                        default:  // must be the first char of an xml name
+                            bkch();
+                            //          Read an element name and put it on top of the
+                            //          element stack
+                            mElm = pair(mElm);  // add new element to the stack
+                            mElm.chars = qname(mIsNSAware);
+                            mElm.name = mElm.local();
+                            mElm.id = (mElm.next != null) ? mElm.next.id : 0;  // flags
+                            mElm.num = 0;     // namespace counter
+                            //          Find the list of defined attributes of the current
+                            //          element
+                            Pair elm = find(mAttL, mElm.chars);
+                            mElm.list = (elm != null) ? elm.list : null;
+                            //          Read attributes till the end of the element tag
+                            mAttrIdx = 0;
+                            Pair att = pair(null);
+                            att.num = 0;  // clear attribute's flags
+                            attr(att);     // get all attributes inc. defaults
+                            del(att);
+                            mElm.value = (mIsNSAware) ? rslv(mElm.chars) : null;
+                            //          Skip white spaces before '>'
+                            switch (wsskip()) {
+                                case '>':
+                                    getch();  // read '>'
+                                    mEvt = EV_ELMS;
+                                    break;
+
+                                case '/':
+                                    getch();  // read '/'
+                                    if (getch() != '>') // read '>'
+                                    {
+                                        panic(FAULT);
+                                    }
+                                    mEvt = EV_ELM;
+                                    break;
+
+                                default:
+                                    panic(FAULT);
+                            }
+                            break;
+                    }
+                    break;
+
+                case 1:     // read white space
+                    switch (ch) {
+                        case ' ':
+                        case '\t':
+                        case '\n':
+                            bappend(ch);
+                            break;
+
+                        case '\r':              // EOL processing [#2.11]
+                            if (getch() != '\n') {
+                                bkch();
+                            }
+                            bappend('\n');
+                            break;
+
+                        case '<':
+                            mEvt = EV_WSPC;
+                            bkch();
+                            bflash_ws();
+                            break;
+
+                        default:
+                            bkch();
+                            st = 2;
+                            break;
+                    }
+                    break;
+
+                case 2:     // read the text content of the element
+                    switch (ch) {
+                        case '&':
+                            if (mUnent == null) {
+                                //              There was no unresolved entity on previous step.
+                                if ((mUnent = ent('x')) != null) {
+                                    mEvt = EV_TEXT;
+                                    bkch();      // move back to ';' after entity name
+                                    setch('&');  // parser must be back on next step
+                                    bflash();
+                                }
+                            } else {
+                                //              There was unresolved entity on previous step.
+                                mEvt = EV_ENT;
+                                skippedEnt(mUnent);
+                                mUnent = null;
+                            }
+                            break;
+
+                        case '<':
+                            mEvt = EV_TEXT;
+                            bkch();
+                            bflash();
+                            break;
+
+                        case '\r':  // EOL processing [#2.11]
+                            if (getch() != '\n') {
+                                bkch();
+                            }
+                            bappend('\n');
+                            break;
+
+                        case EOS:
+                            panic(FAULT);
+
+                        default:
+                            bappend(ch);
+                            break;
+                    }
+                    break;
+
+                default:
+                    panic(FAULT);
+            }
+        }
+
+        return mEvt;
+    }
+
+    /**
+     * Parses the document type declaration.
+     *
+     * @exception Exception is parser specific exception form panic method.
+     * @exception IOException
+     */
+    private void dtd() throws Exception {
+        char ch;
+        String str = null;
+        String name = null;
+        Pair psid = null;
+        // read 'DOCTYPE'
+        if ("DOCTYPE".equals(name(false)) != true) {
+            panic(FAULT);
+        }
+        mPh = PH_DTD;  // DTD
+        for (short st = 0; st >= 0;) {
+            ch = getch();
+            // report error if EOS is reached while parsing the DTD
+            if (ch == EOS) {
+                panic(FAULT);
+            }
+            switch (st) {
+                case 0:     // read the document type name
+                    if (chtyp(ch) != ' ') {
+                        bkch();
+                        name = name(mIsNSAware);
+                        wsskip();
+                        st = 1;  // read 'PUPLIC' or 'SYSTEM'
+                    }
+                    break;
+
+                case 1:     // read 'PUPLIC' or 'SYSTEM'
+                    switch (chtyp(ch)) {
+                        case 'A':
+                            bkch();
+                            psid = pubsys(' ');
+                            st = 2;  // skip spaces before internal subset
+                            docType(name, psid.name, psid.value);
+                            break;
+
+                        case '[':
+                            bkch();
+                            st = 2;    // skip spaces before internal subset
+                            docType(name, null, null);
+                            break;
+
+                        case '>':
+                            bkch();
+                            st = 3;    // skip spaces after internal subset
+                            docType(name, null, null);
+                            break;
+
+                        default:
+                            panic(FAULT);
+                    }
+                    break;
+
+                case 2:     // skip spaces before internal subset
+                    switch (chtyp(ch)) {
+                        case '[':
+                            //          Process internal subset
+                            dtdsub();
+                            st = 3;  // skip spaces after internal subset
+                            break;
+
+                        case '>':
+                            //          There is no internal subset
+                            bkch();
+                            st = 3;  // skip spaces after internal subset
+                            break;
+
+                        case ' ':
+                            // skip white spaces
+                            break;
+
+                        default:
+                            panic(FAULT);
+                    }
+                    break;
+
+                case 3:     // skip spaces after internal subset
+                    switch (chtyp(ch)) {
+                        case '>':
+                            if (psid != null) {
+                                //              Report the DTD external subset
+                                InputSource is = resolveEnt(name, psid.name, psid.value);
+                                if (is != null) {
+                                    if (mIsSAlone == false) {
+                                        //              Set the end of DTD external subset char
+                                        bkch();
+                                        setch(']');
+                                        //              Set the DTD external subset InputSource
+                                        push(new Input(BUFFSIZE_READER));
+                                        setinp(is);
+                                        mInp.pubid = psid.name;
+                                        mInp.sysid = psid.value;
+                                        //              Parse the DTD external subset
+                                        dtdsub();
+                                    } else {
+                                        //              Unresolved DTD external subset
+                                        skippedEnt("[dtd]");
+                                        //              Release reader and stream
+                                        if (is.getCharacterStream() != null) {
+                                            try {
+                                                is.getCharacterStream().close();
+                                            } catch (IOException ioe) {
+                                            }
+                                        }
+                                        if (is.getByteStream() != null) {
+                                            try {
+                                                is.getByteStream().close();
+                                            } catch (IOException ioe) {
+                                            }
+                                        }
+                                    }
+                                } else {
+                                    //          Unresolved DTD external subset
+                                    skippedEnt("[dtd]");
+                                }
+                                del(psid);
+                            }
+                            st = -1;  // end of DTD
+                            break;
+
+                        case ' ':
+                            // skip white spaces
+                            break;
+
+                        default:
+                            panic(FAULT);
+                    }
+                    break;
+
+                default:
+                    panic(FAULT);
+            }
+        }
+    }
+
+    /**
+     * Parses the document type declaration subset.
+     *
+     * @exception Exception is parser specific exception form panic method.
+     * @exception IOException
+     */
+    private void dtdsub() throws Exception {
+        startInternalSub(); // reports the event before parsing the subset
+
+        char ch;
+        for (short st = 0; st >= 0;) {
+            ch = getch();
+            switch (st) {
+                case 0:     // skip white spaces before a declaration
+                    switch (chtyp(ch)) {
+                        case '<':
+                            ch = getch();
+                            switch (ch) {
+                                case '?':
+                                    pi();
+                                    break;
+
+                                case '!':
+                                    ch = getch();
+                                    bkch();
+                                    if (ch == '-') {
+                                        comm();
+                                        break;
+                                    }
+                                    //          A markup or an entity declaration
+                                    bntok();
+                                    switch (bkeyword()) {
+                                        case 'n':
+                                            dtdent();
+                                            break;
+
+                                        case 'a':
+                                            dtdattl();    // parse attributes declaration
+                                            break;
+
+                                        case 'e':
+                                            dtdelm();     // parse element declaration
+                                            break;
+
+                                        case 'o':
+                                            dtdnot();     // parse notation declaration
+                                            break;
+
+                                        default:
+                                            panic(FAULT); // unsupported markup declaration
+                                            break;
+                                    }
+                                    st = 1;  // read the end of declaration
+                                    break;
+
+                                default:
+                                    panic(FAULT);
+                                    break;
+                            }
+                            break;
+
+                        case '%':
+                            //          A parameter entity reference
+                            pent(' ');
+                            break;
+
+                        case ']':
+                            //          End of DTD subset
+                            st = -1;
+                            break;
+
+                        case ' ':
+                            //          Skip white spaces
+                            break;
+
+                        case 'Z':
+                            //          End of stream
+                            if (getch() != ']') {
+                                panic(FAULT);
+                            }
+                            st = -1;
+                            break;
+
+                        default:
+                            panic(FAULT);
+                    }
+                    break;
+
+                case 1:     // read the end of declaration
+                    switch (ch) {
+                        case '>':   // there is no notation
+                            st = 0; // skip white spaces before a declaration
+                            break;
+
+                        case ' ':
+                        case '\n':
+                        case '\r':
+                        case '\t':
+                            //          Skip white spaces
+                            break;
+
+                        default:
+                            panic(FAULT);
+                            break;
+                    }
+                    break;
+
+                default:
+                    panic(FAULT);
+            }
+        }
+    }
+
+    /**
+     * Parses an entity declaration. This method fills the general (
+     * <code>mEnt</code>) and parameter
+     * (
+     * <code>mPEnt</code>) entity look up table.
+     *
+     * @exception Exception is parser specific exception form panic method.
+     * @exception IOException
+     */
+    @SuppressWarnings("fallthrough")
+    private void dtdent() throws Exception {
+        String str = null;
+        char[] val = null;
+        Input inp = null;
+        Pair ids = null;
+        char ch;
+        for (short st = 0; st >= 0;) {
+            ch = getch();
+            switch (st) {
+                case 0:     // skip white spaces before entity name
+                    switch (chtyp(ch)) {
+                        case ' ':
+                            //          Skip white spaces
+                            break;
+
+                        case '%':
+                            //          Parameter entity or parameter entity declaration.
+                            ch = getch();
+                            bkch();
+                            if (chtyp(ch) == ' ') {
+                                //              Parameter entity declaration.
+                                wsskip();
+                                str = name(false);
+                                switch (chtyp(wsskip())) {
+                                    case 'A':
+                                        //              Read the external identifier
+                                        ids = pubsys(' ');
+                                        if (wsskip() == '>') {
+                                            //          External parsed entity
+                                            if (mPEnt.containsKey(str) == false) {      // [#4.2]
+                                                inp = new Input();
+                                                inp.pubid = ids.name;
+                                                inp.sysid = ids.value;
+                                                mPEnt.put(str, inp);
+                                            }
+                                        } else {
+                                            panic(FAULT);
+                                        }
+                                        del(ids);
+                                        st = -1;  // the end of declaration
+                                        break;
+
+                                    case '\"':
+                                    case '\'':
+                                        //              Read the parameter entity value
+                                        bqstr('d');
+                                        //              Create the parameter entity value
+                                        val = new char[mBuffIdx + 1];
+                                        System.arraycopy(mBuff, 1, val, 1, val.length - 1);
+                                        //              Add surrounding spaces [#4.4.8]
+                                        val[0] = ' ';
+                                        //              Add the entity to the entity look up table
+                                        if (mPEnt.containsKey(str) == false) {  // [#4.2]
+                                            inp = new Input(val);
+                                            inp.pubid = mInp.pubid;
+                                            inp.sysid = mInp.sysid;
+                                            inp.xmlenc = mInp.xmlenc;
+                                            inp.xmlver = mInp.xmlver;
+                                            mPEnt.put(str, inp);
+                                        }
+                                        st = -1;  // the end of declaration
+                                        break;
+
+                                    default:
+                                        panic(FAULT);
+                                        break;
+                                }
+                            } else {
+                                //              Parameter entity reference.
+                                pent(' ');
+                            }
+                            break;
+
+                        default:
+                            bkch();
+                            str = name(false);
+                            st = 1;  // read entity declaration value
+                            break;
+                    }
+                    break;
+
+                case 1:     // read entity declaration value
+                    switch (chtyp(ch)) {
+                        case '\"':  // internal entity
+                        case '\'':
+                            bkch();
+                            bqstr('d');  // read a string into the buffer
+                            if (mEnt.get(str) == null) {
+                                //              Create general entity value
+                                val = new char[mBuffIdx];
+                                System.arraycopy(mBuff, 1, val, 0, val.length);
+                                //              Add the entity to the entity look up table
+                                if (mEnt.containsKey(str) == false) {   // [#4.2]
+                                    inp = new Input(val);
+                                    inp.pubid = mInp.pubid;
+                                    inp.sysid = mInp.sysid;
+                                    inp.xmlenc = mInp.xmlenc;
+                                    inp.xmlver = mInp.xmlver;
+                                    mEnt.put(str, inp);
+                                }
+                            }
+                            st = -1;  // the end of declaration
+                            break;
+
+                        case 'A':  // external entity
+                            bkch();
+                            ids = pubsys(' ');
+                            switch (wsskip()) {
+                                case '>':  // external parsed entity
+                                    if (mEnt.containsKey(str) == false) {  // [#4.2]
+                                        inp = new Input();
+                                        inp.pubid = ids.name;
+                                        inp.sysid = ids.value;
+                                        mEnt.put(str, inp);
+                                    }
+                                    break;
+
+                                case 'N':  // external general unparsed entity
+                                    if ("NDATA".equals(name(false)) == true) {
+                                        wsskip();
+                                        unparsedEntDecl(str, ids.name, ids.value, name(false));
+                                        break;
+                                    }
+                                default:
+                                    panic(FAULT);
+                                    break;
+                            }
+                            del(ids);
+                            st = -1;  // the end of declaration
+                            break;
+
+                        case ' ':
+                            //          Skip white spaces
+                            break;
+
+                        default:
+                            panic(FAULT);
+                            break;
+                    }
+                    break;
+
+                default:
+                    panic(FAULT);
+            }
+        }
+    }
+
+    /**
+     * Parses an element declaration.
+     *
+     * This method parses the declaration up to the closing angle bracket.
+     *
+     * @exception Exception is parser specific exception form panic method.
+     * @exception IOException
+     */
+    @SuppressWarnings("fallthrough")
+    private void dtdelm() throws Exception {
+        //              This is stub implementation which skips an element
+        //              declaration.
+        wsskip();
+        name(mIsNSAware);
+
+        char ch;
+        while (true) {
+            ch = getch();
+            switch (ch) {
+                case '>':
+                    bkch();
+                    return;
+
+                case EOS:
+                    panic(FAULT);
+
+                default:
+                    break;
+            }
+        }
+    }
+
+    /**
+     * Parses an attribute list declaration.
+     *
+     * This method parses the declaration up to the closing angle bracket.
+     *
+     * @exception Exception is parser specific exception form panic method.
+     * @exception IOException
+     */
+    private void dtdattl() throws Exception {
+        char elmqn[] = null;
+        Pair elm = null;
+        char ch;
+        for (short st = 0; st >= 0;) {
+            ch = getch();
+            switch (st) {
+                case 0:     // read the element name
+                    switch (chtyp(ch)) {
+                        case 'a':
+                        case 'A':
+                        case '_':
+                        case 'X':
+                        case ':':
+                            bkch();
+                            //          Get the element from the list or add a new one.
+                            elmqn = qname(mIsNSAware);
+                            elm = find(mAttL, elmqn);
+                            if (elm == null) {
+                                elm = pair(mAttL);
+                                elm.chars = elmqn;
+                                mAttL = elm;
+                            }
+                            st = 1;  // read an attribute declaration
+                            break;
+
+                        case ' ':
+                            break;
+
+                        case '%':
+                            pent(' ');
+                            break;
+
+                        default:
+                            panic(FAULT);
+                            break;
+                    }
+                    break;
+
+                case 1:     // read an attribute declaration
+                    switch (chtyp(ch)) {
+                        case 'a':
+                        case 'A':
+                        case '_':
+                        case 'X':
+                        case ':':
+                            bkch();
+                            dtdatt(elm);
+                            if (wsskip() == '>') {
+                                return;
+                            }
+                            break;
+
+                        case ' ':
+                            break;
+
+                        case '%':
+                            pent(' ');
+                            break;
+
+                        default:
+                            panic(FAULT);
+                            break;
+                    }
+                    break;
+
+                default:
+                    panic(FAULT);
+                    break;
+            }
+        }
+    }
+
+    /**
+     * Parses an attribute declaration.
+     *
+     * The attribute uses the following fields of Pair object: chars - characters
+     * of qualified name id - the type identifier of the attribute list - a pair
+     * which holds the default value (chars field)
+     *
+     * @param elm An object which represents all defined attributes on an
+     * element.
+     * @exception Exception is parser specific exception form panic method.
+     * @exception IOException
+     */
+    @SuppressWarnings("fallthrough")
+    private void dtdatt(Pair elm) throws Exception {
+        char attqn[] = null;
+        Pair att = null;
+        char ch;
+        for (short st = 0; st >= 0;) {
+            ch = getch();
+            switch (st) {
+                case 0:     // the attribute name
+                    switch (chtyp(ch)) {
+                        case 'a':
+                        case 'A':
+                        case '_':
+                        case 'X':
+                        case ':':
+                            bkch();
+                            //          Get the attribute from the list or add a new one.
+                            attqn = qname(mIsNSAware);
+                            att = find(elm.list, attqn);
+                            if (att == null) {
+                                //              New attribute declaration
+                                att = pair(elm.list);
+                                att.chars = attqn;
+                                elm.list = att;
+                            } else {
+                                //              Do not override the attribute declaration [#3.3]
+                                att = pair(null);
+                                att.chars = attqn;
+                                att.id = 'c';
+                            }
+                            wsskip();
+                            st = 1;
+                            break;
+
+                        case '%':
+                            pent(' ');
+                            break;
+
+                        case ' ':
+                            break;
+
+                        default:
+                            panic(FAULT);
+                            break;
+                    }
+                    break;
+
+                case 1:     // the attribute type
+                    switch (chtyp(ch)) {
+                        case '(':
+                            att.id = 'u';  // enumeration type
+                            st = 2;        // read the first element of the list
+                            break;
+
+                        case '%':
+                            pent(' ');
+                            break;
+
+                        case ' ':
+                            break;
+
+                        default:
+                            bkch();
+                            bntok();  // read type id
+                            att.id = bkeyword();
+                            switch (att.id) {
+                                case 'o':   // NOTATION
+                                    if (wsskip() != '(') {
+                                        panic(FAULT);
+                                    }
+                                    ch = getch();
+                                    st = 2;  // read the first element of the list
+                                    break;
+
+                                case 'i':     // ID
+                                case 'r':     // IDREF
+                                case 'R':     // IDREFS
+                                case 'n':     // ENTITY
+                                case 'N':     // ENTITIES
+                                case 't':     // NMTOKEN
+                                case 'T':     // NMTOKENS
+                                case 'c':     // CDATA
+                                    wsskip();
+                                    st = 4;  // read default declaration
+                                    break;
+
+                                default:
+                                    panic(FAULT);
+                                    break;
+                            }
+                            break;
+                    }
+                    break;
+
+                case 2:     // read the first element of the list
+                    switch (chtyp(ch)) {
+                        case 'a':
+                        case 'A':
+                        case 'd':
+                        case '.':
+                        case ':':
+                        case '-':
+                        case '_':
+                        case 'X':
+                            bkch();
+                            switch (att.id) {
+                                case 'u':  // enumeration type
+                                    bntok();
+                                    break;
+
+                                case 'o':  // NOTATION
+                                    mBuffIdx = -1;
+                                    bname(false);
+                                    break;
+
+                                default:
+                                    panic(FAULT);
+                                    break;
+                            }
+                            wsskip();
+                            st = 3;  // read next element of the list
+                            break;
+
+                        case '%':
+                            pent(' ');
+                            break;
+
+                        case ' ':
+                            break;
+
+                        default:
+                            panic(FAULT);
+                            break;
+                    }
+                    break;
+
+                case 3:     // read next element of the list
+                    switch (ch) {
+                        case ')':
+                            wsskip();
+                            st = 4;  // read default declaration
+                            break;
+
+                        case '|':
+                            wsskip();
+                            switch (att.id) {
+                                case 'u':  // enumeration type
+                                    bntok();
+                                    break;
+
+                                case 'o':  // NOTATION
+                                    mBuffIdx = -1;
+                                    bname(false);
+                                    break;
+
+                                default:
+                                    panic(FAULT);
+                                    break;
+                            }
+                            wsskip();
+                            break;
+
+                        case '%':
+                            pent(' ');
+                            break;
+
+                        default:
+                            panic(FAULT);
+                            break;
+                    }
+                    break;
+
+                case 4:     // read default declaration
+                    switch (ch) {
+                        case '#':
+                            bntok();
+                            switch (bkeyword()) {
+                                case 'F':  // FIXED
+                                    switch (wsskip()) {
+                                        case '\"':
+                                        case '\'':
+                                            st = 5;  // read the default value
+                                            break;
+
+                                        case EOS:
+                                            panic(FAULT);
+
+                                        default:
+                                            st = -1;
+                                            break;
+                                    }
+                                    break;
+
+                                case 'Q':  // REQUIRED
+                                case 'I':  // IMPLIED
+                                    st = -1;
+                                    break;
+
+                                default:
+                                    panic(FAULT);
+                                    break;
+                            }
+                            break;
+
+                        case '\"':
+                        case '\'':
+                            bkch();
+                            st = 5;  // read the default value
+                            break;
+
+                        case ' ':
+                        case '\n':
+                        case '\r':
+                        case '\t':
+                            break;
+
+                        case '%':
+                            pent(' ');
+                            break;
+
+                        default:
+                            bkch();
+                            st = -1;
+                            break;
+                    }
+                    break;
+
+                case 5:     // read the default value
+                    switch (ch) {
+                        case '\"':
+                        case '\'':
+                            bkch();
+                            bqstr('d');  // the value in the mBuff now
+                            att.list = pair(null);
+                            //          Create a string like "attqname='value' "
+                            att.list.chars = new char[att.chars.length + mBuffIdx + 3];
+                            System.arraycopy(
+                                    att.chars, 1, att.list.chars, 0, att.chars.length - 1);
+                            att.list.chars[att.chars.length - 1] = '=';
+                            att.list.chars[att.chars.length] = ch;
+                            System.arraycopy(
+                                    mBuff, 1, att.list.chars, att.chars.length + 1, mBuffIdx);
+                            att.list.chars[att.chars.length + mBuffIdx + 1] = ch;
+                            att.list.chars[att.chars.length + mBuffIdx + 2] = ' ';
+                            st = -1;
+                            break;
+
+                        default:
+                            panic(FAULT);
+                            break;
+                    }
+                    break;
+
+                default:
+                    panic(FAULT);
+                    break;
+            }
+        }
+    }
+
+    /**
+     * Parses a notation declaration.
+     *
+     * This method parses the declaration up to the closing angle bracket.
+     *
+     * @exception Exception is parser specific exception form panic method.
+     * @exception IOException
+     */
+    private void dtdnot() throws Exception {
+        wsskip();
+        String name = name(false);
+        wsskip();
+        Pair ids = pubsys('N');
+        notDecl(name, ids.name, ids.value);
+        del(ids);
+    }
+
+    /**
+     * Parses an attribute.
+     *
+     * This recursive method is responsible for prefix addition
+     * (
+     * <code>mPref</code>) on the way down. The element's start tag end triggers
+     * the return process. The method then on it's way back resolves prefixes
+     * and accumulates attributes.
+     *
+     * <p><code>att.num</code> carries attribute flags where: 0x1 - attribute is
+     * declared in DTD (attribute declaration had been read); 0x2 - attribute's
+     * default value is used.</p>
+     *
+     * @param att An object which reprecents current attribute.
+     * @exception Exception is parser specific exception form panic method.
+     * @exception IOException
+     */
+    @SuppressWarnings("fallthrough")
+    private void attr(Pair att) throws Exception {
+        switch (wsskip()) {
+            case '/':
+            case '>':
+                if ((att.num & 0x2) == 0) {  // all attributes have been read
+                    att.num |= 0x2;  // set default attribute flag
+                    Input inp = mInp;
+                    //          Go through all attributes defined on current element.
+                    for (Pair def = mElm.list; def != null; def = def.next) {
+                        if (def.list == null) // no default value
+                        {
+                            continue;
+                        }
+                        //              Go through all attributes defined on current
+                        //              element and add defaults.
+                        Pair act = find(att.next, def.chars);
+                        if (act == null) {
+                            push(new Input(def.list.chars));
+                        }
+                    }
+                    if (mInp != inp) {  // defaults have been added
+                        attr(att);
+                        return;
+                    }
+                }
+                //              Ensure the attribute string array capacity
+                mAttrs.setLength(mAttrIdx);
+                mItems = mAttrs.mItems;
+                return;
+
+            case EOS:
+                panic(FAULT);
+
+            default:
+                //              Read the attribute name and value
+                att.chars = qname(mIsNSAware);
+                att.name = att.local();
+                String type = atype(att);  // sets attribute's type on att.id
+                wsskip();
+                if (getch() != '=') {
+                    panic(FAULT);
+                }
+                bqstr((char) att.id);   // read the value with normalization.
+                String val = new String(mBuff, 1, mBuffIdx);
+                Pair next = pair(att);
+                next.num = (att.num & ~0x1);  // inherit attribute flags
+                //              Put a namespace declaration on top of the prefix stack
+                if ((mIsNSAware == false) || (isdecl(att, val) == false)) {
+                    //          An ordinary attribute
+                    mAttrIdx++;
+                    attr(next);     // recursive call to parse the next attribute
+                    mAttrIdx--;
+                    //          Add the attribute to the attributes string array
+                    char idx = (char) (mAttrIdx << 3);
+                    mItems[idx + 1] = att.qname();  // attr qname
+                    mItems[idx + 2] = (mIsNSAware) ? att.name : ""; // attr local name
+                    mItems[idx + 3] = val;          // attr value
+                    mItems[idx + 4] = type;         // attr type
+                    switch (att.num & 0x3) {
+                        case 0x0:
+                            mItems[idx + 5] = null;
+                            break;
+
+                        case 0x1:  // declared attribute
+                            mItems[idx + 5] = "d";
+                            break;
+
+                        default:  // 0x2, 0x3 - default attribute always declared
+                            mItems[idx + 5] = "D";
+                            break;
+                    }
+                    //          Resolve the prefix if any and report the attribute
+                    //          NOTE: The attribute does not accept the default namespace.
+                    mItems[idx + 0] = (att.chars[0] != 0) ? rslv(att.chars) : "";
+                } else {
+                    //          A namespace declaration. mPref.name contains prefix and
+                    //          mPref.value contains namespace URI set by isdecl method.
+                    //          Report a start of the new mapping
+                    newPrefix();
+                    //          Recursive call to parse the next attribute
+                    attr(next);
+                    //          NOTE: The namespace declaration is not reported.
+                }
+                del(next);
+                break;
+        }
+    }
+
+    /**
+     * Retrieves attribute type.
+     *
+     * This method sets the type of normalization in the attribute
+     * <code>id</code> field and returns the name of attribute type.
+     *
+     * @param att An object which represents current attribute.
+     * @return The name of the attribute type.
+     * @exception Exception is parser specific exception form panic method.
+     */
+    private String atype(Pair att)
+            throws Exception {
+        Pair attr;
+
+        // CDATA-type normalization by default [#3.3.3]
+        att.id = 'c';
+        if (mElm.list == null || (attr = find(mElm.list, att.chars)) == null) {
+            return "CDATA";
+        }
+
+        att.num |= 0x1;  // attribute is declared
+
+        // Non-CDATA normalization except when the attribute type is CDATA.
+        att.id = 'i';
+        switch (attr.id) {
+            case 'i':
+                return "ID";
+
+            case 'r':
+                return "IDREF";
+
+            case 'R':
+                return "IDREFS";
+
+            case 'n':
+                return "ENTITY";
+
+            case 'N':
+                return "ENTITIES";
+
+            case 't':
+                return "NMTOKEN";
+
+            case 'T':
+                return "NMTOKENS";
+
+            case 'u':
+                return "NMTOKEN";
+
+            case 'o':
+                return "NOTATION";
+
+            case 'c':
+                att.id = 'c';
+                return "CDATA";
+
+            default:
+                panic(FAULT);
+        }
+        return null;
+    }
+
+    /**
+     * Parses a comment.
+     *
+     * The &apos;&lt;!&apos; part is read in dispatcher so the method starts
+     * with first &apos;-&apos; after &apos;&lt;!&apos;.
+     *
+     * @exception Exception is parser specific exception form panic method.
+     */
+    @SuppressWarnings("fallthrough")
+    private void comm() throws Exception {
+        if (mPh == PH_DOC_START) {
+            mPh = PH_MISC_DTD;  // misc before DTD
+        }               // '<!' has been already read by dispetcher.
+        char ch;
+        mBuffIdx = -1;
+        for (short st = 0; st >= 0;) {
+            ch = (mChIdx < mChLen) ? mChars[mChIdx++] : getch();
+            if (ch == EOS) {
+                panic(FAULT);
+            }
+            switch (st) {
+                case 0:     // first '-' of the comment open
+                    if (ch == '-') {
+                        st = 1;
+                    } else {
+                        panic(FAULT);
+                    }
+                    break;
+
+                case 1:     // secind '-' of the comment open
+                    if (ch == '-') {
+                        st = 2;
+                    } else {
+                        panic(FAULT);
+                    }
+                    break;
+
+                case 2:     // skip the comment body
+                    switch (ch) {
+                        case '-':
+                            st = 3;
+                            break;
+
+                        default:
+                            bappend(ch);
+                            break;
+                    }
+                    break;
+
+                case 3:     // second '-' of the comment close
+                    switch (ch) {
+                        case '-':
+                            st = 4;
+                            break;
+
+                        default:
+                            bappend('-');
+                            bappend(ch);
+                            st = 2;
+                            break;
+                    }
+                    break;
+
+                case 4:     // '>' of the comment close
+                    if (ch == '>') {
+                        comm(mBuff, mBuffIdx + 1);
+                        st = -1;
+                        break;
+                    }
+                // else - panic [#2.5 compatibility note]
+
+                default:
+                    panic(FAULT);
+            }
+        }
+    }
+
+    /**
+     * Parses a processing instruction.
+     *
+     * The &apos;&lt;?&apos; is read in dispatcher so the method starts with
+     * first character of PI target name after &apos;&lt;?&apos;.
+     *
+     * @exception Exception is parser specific exception form panic method.
+     * @exception IOException
+     */
+    private void pi() throws Exception {
+        // '<?' has been already read by dispetcher.
+        char ch;
+        String str = null;
+        mBuffIdx = -1;
+        for (short st = 0; st >= 0;) {
+            ch = getch();
+            if (ch == EOS) {
+                panic(FAULT);
+            }
+            switch (st) {
+                case 0:     // read the PI target name
+                    switch (chtyp(ch)) {
+                        case 'a':
+                        case 'A':
+                        case '_':
+                        case ':':
+                        case 'X':
+                            bkch();
+                            str = name(false);
+                            //          PI target name may not be empty string [#2.6]
+                            //          PI target name 'XML' is reserved [#2.6]
+                            if ((str.isEmpty())
+                                    || (mXml.name.equals(str.toLowerCase(Locale.ROOT)) == true)) {
+                                panic(FAULT);
+                            }
+                            //          This is processing instruction
+                            if (mPh == PH_DOC_START) // the beginning of the document
+                            {
+                                mPh = PH_MISC_DTD;    // misc before DTD
+                            }
+                            wsskip();  // skip spaces after the PI target name
+                            st = 1;    // accumulate the PI body
+                            mBuffIdx = -1;
+                            break;
+
+                        default:
+                            panic(FAULT);
+                    }
+                    break;
+
+                case 1:     // accumulate the PI body
+                    switch (ch) {
+                        case '?':
+                            st = 2;  // end of the PI body
+                            break;
+
+                        default:
+                            bappend(ch);
+                            break;
+                    }
+                    break;
+
+                case 2:     // end of the PI body
+                    switch (ch) {
+                        case '>':
+                            //          PI has been read.
+                            pi(str, new String(mBuff, 0, mBuffIdx + 1));
+                            st = -1;
+                            break;
+
+                        case '?':
+                            bappend('?');
+                            break;
+
+                        default:
+                            bappend('?');
+                            bappend(ch);
+                            st = 1;  // accumulate the PI body
+                            break;
+                    }
+                    break;
+
+                default:
+                    panic(FAULT);
+            }
+        }
+    }
+
+    /**
+     * Parses a character data.
+     *
+     * The &apos;&lt;!&apos; part is read in dispatcher so the method starts
+     * with first &apos;[&apos; after &apos;&lt;!&apos;.
+     *
+     * @exception Exception is parser specific exception form panic method.
+     * @exception IOException
+     */
+    private void cdat()
+            throws Exception {
+        // '<!' has been already read by dispetcher.
+        char ch;
+        mBuffIdx = -1;
+        for (short st = 0; st >= 0;) {
+            ch = getch();
+            // report error if EOS is reached while parsing the DTD
+            if (ch == EOS) {
+                panic(FAULT);
+            }
+            switch (st) {
+                case 0:     // the first '[' of the CDATA open
+                    if (ch == '[') {
+                        st = 1;
+                    } else {
+                        panic(FAULT);
+                    }
+                    break;
+
+                case 1:     // read "CDATA"
+                    if (chtyp(ch) == 'A') {
+                        bappend(ch);
+                    } else {
+                        if ("CDATA".equals(
+                                new String(mBuff, 0, mBuffIdx + 1)) != true) {
+                            panic(FAULT);
+                        }
+                        bkch();
+                        st = 2;
+                    }
+                    break;
+
+                case 2:     // the second '[' of the CDATA open
+                    if (ch != '[') {
+                        panic(FAULT);
+                    }
+                    mBuffIdx = -1;
+                    st = 3;
+                    break;
+
+                case 3:     // read data before the first ']'
+                    if (ch != ']') {
+                        bappend(ch);
+                    } else {
+                        st = 4;
+                    }
+                    break;
+
+                case 4:     // read the second ']' or continue to read the data
+                    if (ch != ']') {
+                        bappend(']');
+                        bappend(ch);
+                        st = 3;
+                    } else {
+                        st = 5;
+                    }
+                    break;
+
+                case 5:     // read '>' or continue to read the data
+                    switch (ch) {
+                        case ']':
+                            bappend(']');
+                            break;
+
+                        case '>':
+                            bflash();
+                            st = -1;
+                            break;
+
+                        default:
+                            bappend(']');
+                            bappend(']');
+                            bappend(ch);
+                            st = 3;
+                            break;
+                    }
+                    break;
+
+                default:
+                    panic(FAULT);
+            }
+        }
+    }
+
+    /**
+     * Reads a xml name.
+     *
+     * The xml name must conform "Namespaces in XML" specification. Therefore
+     * the ':' character is not allowed in the name. This method should be used
+     * for PI and entity names which may not have a namespace according to the
+     * specification mentioned above.
+     *
+     * @param ns The true value turns namespace conformance on.
+     * @return The name has been read.
+     * @exception Exception When incorrect character appear in the name.
+     * @exception IOException
+     */
+    protected String name(boolean ns)
+            throws Exception {
+        mBuffIdx = -1;
+        bname(ns);
+        return new String(mBuff, 1, mBuffIdx);
+    }
+
+    /**
+     * Reads a qualified xml name.
+     *
+     * The characters of a qualified name is an array of characters. The first
+     * (chars[0]) character is the index of the colon character which separates
+     * the prefix from the local name. If the index is zero, the name does not
+     * contain separator or the parser works in the namespace unaware mode. The
+     * length of qualified name is the length of the array minus one.
+     *
+     * @param ns The true value turns namespace conformance on.
+     * @return The characters of a qualified name.
+     * @exception Exception When incorrect character appear in the name.
+     * @exception IOException
+     */
+    protected char[] qname(boolean ns)
+            throws Exception {
+        mBuffIdx = -1;
+        bname(ns);
+        char chars[] = new char[mBuffIdx + 1];
+        System.arraycopy(mBuff, 0, chars, 0, mBuffIdx + 1);
+        return chars;
+    }
+
+    /**
+     * Reads the public or/and system identifiers.
+     *
+     * @param inp The input object.
+     * @exception Exception is parser specific exception form panic method.
+     * @exception IOException
+     */
+    private void pubsys(Input inp)
+            throws Exception {
+        Pair pair = pubsys(' ');
+        inp.pubid = pair.name;
+        inp.sysid = pair.value;
+        del(pair);
+    }
+
+    /**
+     * Reads the public or/and system identifiers.
+     *
+     * @param flag The 'N' allows public id be without system id.
+     * @return The public or/and system identifiers pair.
+     * @exception Exception is parser specific exception form panic method.
+     * @exception IOException
+     */
+    @SuppressWarnings("fallthrough")
+    private Pair pubsys(char flag) throws Exception {
+        Pair ids = pair(null);
+        String str = name(false);
+        if ("PUBLIC".equals(str) == true) {
+            bqstr('i');  // non-CDATA normalization [#4.2.2]
+            ids.name = new String(mBuff, 1, mBuffIdx);
+            switch (wsskip()) {
+                case '\"':
+                case '\'':
+                    bqstr(' ');
+                    ids.value = new String(mBuff, 1, mBuffIdx);
+                    break;
+
+                case EOS:
+                    panic(FAULT);
+
+                default:
+                    if (flag != 'N') // [#4.7]
+                    {
+                        panic(FAULT);
+                    }
+                    ids.value = null;
+                    break;
+            }
+            return ids;
+        } else if ("SYSTEM".equals(str) == true) {
+            ids.name = null;
+            bqstr(' ');
+            ids.value = new String(mBuff, 1, mBuffIdx);
+            return ids;
+        }
+        panic(FAULT);
+        return null;
+    }
+
+    /**
+     * Reads an attribute value.
+     *
+     * The grammar this method can read is:
+     * <pre>{@code
+     * eqstr := S "=" qstr
+     * qstr  := S ("'" string "'") | ('"' string '"')
+     * }</pre>
+     * This method resolves entities
+     * inside a string unless the parser parses DTD.
+     *
+     * @param flag The '=' character forces the method to accept the '='
+     * character before quoted string and read the following string as not an
+     * attribute ('-'), 'c' - CDATA, 'i' - non CDATA, ' ' - no normalization;
+     * '-' - not an attribute value; 'd' - in DTD context.
+     * @return The content of the quoted strign as a string.
+     * @exception Exception is parser specific exception form panic method.
+     * @exception IOException
+     */
+    protected String eqstr(char flag) throws Exception {
+        if (flag == '=') {
+            wsskip();
+            if (getch() != '=') {
+                panic(FAULT);
+            }
+        }
+        bqstr((flag == '=') ? '-' : flag);
+        return new String(mBuff, 1, mBuffIdx);
+    }
+
+    /**
+     * Resolves an entity.
+     *
+     * This method resolves built-in and character entity references. It is also
+     * reports external entities to the application.
+     *
+     * @param flag The 'x' character forces the method to report a skipped
+     * entity; 'i' character - indicates non-CDATA normalization.
+     * @return Name of unresolved entity or <code>null</code> if entity had been
+     * resolved successfully.
+     * @exception Exception is parser specific exception form panic method.
+     * @exception IOException
+     */
+    @SuppressWarnings("fallthrough")
+    private String ent(char flag) throws Exception {
+        char ch;
+        int idx = mBuffIdx + 1;
+        Input inp = null;
+        String str = null;
+        mESt = 0x100;  // reset the built-in entity recognizer
+        bappend('&');
+        for (short st = 0; st >= 0;) {
+            ch = (mChIdx < mChLen) ? mChars[mChIdx++] : getch();
+            switch (st) {
+                case 0:     // the first character of the entity name
+                case 1:     // read built-in entity name
+                    switch (chtyp(ch)) {
+                        case 'd':
+                        case '.':
+                        case '-':
+                            if (st != 1) {
+                                panic(FAULT);
+                            }
+                        case 'a':
+                        case 'A':
+                        case '_':
+                        case 'X':
+                            bappend(ch);
+                            eappend(ch);
+                            st = 1;
+                            break;
+
+                        case ':':
+                            if (mIsNSAware != false) {
+                                panic(FAULT);
+                            }
+                            bappend(ch);
+                            eappend(ch);
+                            st = 1;
+                            break;
+
+                        case ';':
+                            if (mESt < 0x100) {
+                                //              The entity is a built-in entity
+                                mBuffIdx = idx - 1;
+                                bappend(mESt);
+                                st = -1;
+                                break;
+                            } else if (mPh == PH_DTD) {
+                                //              In DTD entity declaration has to resolve character
+                                //              entities and include "as is" others. [#4.4.7]
+                                bappend(';');
+                                st = -1;
+                                break;
+                            }
+                            //          Convert an entity name to a string
+                            str = new String(mBuff, idx + 1, mBuffIdx - idx);
+                            inp = mEnt.get(str);
+                            //          Restore the buffer offset
+                            mBuffIdx = idx - 1;
+                            if (inp != null) {
+                                if (inp.chars == null) {
+                                    //          External entity
+                                    InputSource is = resolveEnt(str, inp.pubid, inp.sysid);
+                                    if (is != null) {
+                                        push(new Input(BUFFSIZE_READER));
+                                        setinp(is);
+                                        mInp.pubid = inp.pubid;
+                                        mInp.sysid = inp.sysid;
+                                        str = null;  // the entity is resolved
+                                    } else {
+                                        //              Unresolved external entity
+                                        if (flag != 'x') {
+                                            panic(FAULT);  // unknown entity within marckup
+                                        }                                                               //              str is name of unresolved entity
+                                    }
+                                } else {
+                                    //          Internal entity
+                                    push(inp);
+                                    str = null;  // the entity is resolved
+                                }
+                            } else {
+                                //              Unknown or general unparsed entity
+                                if (flag != 'x') {
+                                    panic(FAULT);  // unknown entity within marckup
+                                }                                               //              str is name of unresolved entity
+                            }
+                            st = -1;
+                            break;
+
+                        case '#':
+                            if (st != 0) {
+                                panic(FAULT);
+                            }
+                            st = 2;
+                            break;
+
+                        default:
+                            panic(FAULT);
+                    }
+                    break;
+
+                case 2:     // read character entity
+                    switch (chtyp(ch)) {
+                        case 'd':
+                            bappend(ch);
+                            break;
+
+                        case ';':
+                            //          Convert the character entity to a character
+                            try {
+                                int i = Integer.parseInt(
+                                        new String(mBuff, idx + 1, mBuffIdx - idx), 10);
+                                //          Restore the buffer offset
+                                mBuffIdx = idx - 1;
+                                for(char character : Character.toChars(i)) {
+                                    if (character == ' ' || mInp.next != null) {
+                                        bappend(character, flag);
+                                    } else {
+                                        bappend(character);
+                                    }
+                                }
+                            } catch (NumberFormatException nfe) {
+                                panic(FAULT);
+                            }
+                            st = -1;
+                            break;
+
+                        case 'a':
+                            //          If the entity buffer is empty and ch == 'x'
+                            if ((mBuffIdx == idx) && (ch == 'x')) {
+                                st = 3;
+                                break;
+                            }
+                        default:
+                            panic(FAULT);
+                    }
+                    break;
+
+                case 3:     // read hex character entity
+                    switch (chtyp(ch)) {
+                        case 'A':
+                        case 'a':
+                        case 'd':
+                            bappend(ch);
+                            break;
+
+                        case ';':
+                            //          Convert the character entity to a character
+                            try {
+                                int i = Integer.parseInt(
+                                        new String(mBuff, idx + 1, mBuffIdx - idx), 16);
+                                //          Restore the buffer offset
+                                mBuffIdx = idx - 1;
+                                for(char character : Character.toChars(i)) {
+                                    if (character == ' ' || mInp.next != null) {
+                                        bappend(character, flag);
+                                    } else {
+                                        bappend(character);
+                                    }
+                                }
+                            } catch (NumberFormatException nfe) {
+                                panic(FAULT);
+                            }
+                            st = -1;
+                            break;
+
+                        default:
+                            panic(FAULT);
+                    }
+                    break;
+
+                default:
+                    panic(FAULT);
+            }
+        }
+
+        return str;
+    }
+
+    /**
+     * Resolves a parameter entity.
+     *
+     * This method resolves a parameter entity references. It is also reports
+     * external entities to the application.
+     *
+     * @param flag The '-' instruct the method to do not set up surrounding
+     * spaces [#4.4.8].
+     * @exception Exception is parser specific exception form panic method.
+     * @exception IOException
+     */
+    @SuppressWarnings("fallthrough")
+    private void pent(char flag) throws Exception {
+        char ch;
+        int idx = mBuffIdx + 1;
+        Input inp = null;
+        String str = null;
+        bappend('%');
+        if (mPh != PH_DTD) // the DTD internal subset
+        {
+            return;         // Not Recognized [#4.4.1]
+        }               //              Read entity name
+        bname(false);
+        str = new String(mBuff, idx + 2, mBuffIdx - idx - 1);
+        if (getch() != ';') {
+            panic(FAULT);
+        }
+        inp = mPEnt.get(str);
+        //              Restore the buffer offset
+        mBuffIdx = idx - 1;
+        if (inp != null) {
+            if (inp.chars == null) {
+                //              External parameter entity
+                InputSource is = resolveEnt(str, inp.pubid, inp.sysid);
+                if (is != null) {
+                    if (flag != '-') {
+                        bappend(' ');  // tail space
+                    }
+                    push(new Input(BUFFSIZE_READER));
+                    // BUG: there is no leading space! [#4.4.8]
+                    setinp(is);
+                    mInp.pubid = inp.pubid;
+                    mInp.sysid = inp.sysid;
+                } else {
+                    //          Unresolved external parameter entity
+                    skippedEnt("%" + str);
+                }
+            } else {
+                //              Internal parameter entity
+                if (flag == '-') {
+                    //          No surrounding spaces
+                    inp.chIdx = 1;
+                } else {
+                    //          Insert surrounding spaces
+                    bappend(' ');  // tail space
+                    inp.chIdx = 0;
+                }
+                push(inp);
+            }
+        } else {
+            //          Unknown parameter entity
+            skippedEnt("%" + str);
+        }
+    }
+
+    /**
+     * Recognizes and handles a namespace declaration.
+     *
+     * This method identifies a type of namespace declaration if any and puts
+     * new mapping on top of prefix stack.
+     *
+     * @param name The attribute qualified name (<code>name.value</code> is a
+     * <code>String</code> object which represents the attribute prefix).
+     * @param value The attribute value.
+     * @return <code>true</code> if a namespace declaration is recognized.
+     */
+    private boolean isdecl(Pair name, String value) {
+        if (name.chars[0] == 0) {
+            if ("xmlns".equals(name.name) == true) {
+                //              New default namespace declaration
+                mPref = pair(mPref);
+                mPref.list = mElm;  // prefix owner element
+                mPref.value = value;
+                mPref.name = "";
+                mPref.chars = NONS;
+                mElm.num++;  // namespace counter
+                return true;
+            }
+        } else {
+            if (name.eqpref(XMLNS) == true) {
+                //              New prefix declaration
+                int len = name.name.length();
+                mPref = pair(mPref);
+                mPref.list = mElm;  // prefix owner element
+                mPref.value = value;
+                mPref.name = name.name;
+                mPref.chars = new char[len + 1];
+                mPref.chars[0] = (char) (len + 1);
+                name.name.getChars(0, len, mPref.chars, 1);
+                mElm.num++;  // namespace counter
+                return true;
+            }
+        }
+        return false;
+    }
+
+    /**
+     * Resolves a prefix.
+     *
+     * @return The namespace assigned to the prefix.
+     * @exception Exception When mapping for specified prefix is not found.
+     */
+    private String rslv(char[] qname)
+            throws Exception {
+        for (Pair pref = mPref; pref != null; pref = pref.next) {
+            if (pref.eqpref(qname) == true) {
+                return pref.value;
+            }
+        }
+        if (qname[0] == 1) {  // QNames like ':local'
+            for (Pair pref = mPref; pref != null; pref = pref.next) {
+                if (pref.chars[0] == 0) {
+                    return pref.value;
+                }
+            }
+        }
+        panic(FAULT);
+        return null;
+    }
+
+    /**
+     * Skips xml white space characters.
+     *
+     * This method skips white space characters (' ', '\t', '\n', '\r') and
+     * looks ahead not white space character.
+     *
+     * @return The first not white space look ahead character.
+     * @exception IOException
+     */
+    protected char wsskip()
+            throws IOException {
+        char ch;
+        while (true) {
+            //          Read next character
+            ch = (mChIdx < mChLen) ? mChars[mChIdx++] : getch();
+            if (ch < 0x80) {
+                if (nmttyp[ch] != 3) // [ \t\n\r]
+                {
+                    break;
+                }
+            } else {
+                break;
+            }
+        }
+        mChIdx--;  // bkch();
+        return ch;
+    }
+
+    /**
+     * Reports document type.
+     *
+     * @param name The name of the entity.
+     * @param pubid The public identifier of the entity or <code>null</code>.
+     * @param sysid The system identifier of the entity or <code>null</code>.
+     */
+    protected abstract void docType(String name, String pubid, String sysid)
+            throws SAXException;
+
+    /**
+     * Reports the start of DTD internal subset.
+     *
+     * @throws SAXException if the receiver throws SAXException
+     */
+    public abstract void startInternalSub () throws SAXException;
+
+    /**
+     * Reports a comment.
+     *
+     * @param text The comment text starting from first character.
+     * @param length The number of characters in comment.
+     */
+    protected abstract void comm(char[] text, int length);
+
+    /**
+     * Reports a processing instruction.
+     *
+     * @param target The processing instruction target name.
+     * @param body The processing instruction body text.
+     */
+    protected abstract void pi(String target, String body)
+            throws Exception;
+
+    /**
+     * Reports new namespace prefix. The Namespace prefix (
+     * <code>mPref.name</code>) being declared and the Namespace URI (
+     * <code>mPref.value</code>) the prefix is mapped to. An empty string is
+     * used for the default element namespace, which has no prefix.
+     */
+    protected abstract void newPrefix()
+            throws Exception;
+
+    /**
+     * Reports skipped entity name.
+     *
+     * @param name The entity name.
+     */
+    protected abstract void skippedEnt(String name)
+            throws Exception;
+
+    /**
+     * Returns an
+     * <code>InputSource</code> for specified entity or
+     * <code>null</code>.
+     *
+     * @param name The name of the entity.
+     * @param pubid The public identifier of the entity.
+     * @param sysid The system identifier of the entity.
+     */
+    protected abstract InputSource resolveEnt(
+            String name, String pubid, String sysid)
+            throws Exception;
+
+    /**
+     * Reports notation declaration.
+     *
+     * @param name The notation's name.
+     * @param pubid The notation's public identifier, or null if none was given.
+     * @param sysid The notation's system identifier, or null if none was given.
+     */
+    protected abstract void notDecl(String name, String pubid, String sysid)
+            throws Exception;
+
+    /**
+     * Reports unparsed entity name.
+     *
+     * @param name The unparsed entity's name.
+     * @param pubid The entity's public identifier, or null if none was given.
+     * @param sysid The entity's system identifier.
+     * @param notation The name of the associated notation.
+     */
+    protected abstract void unparsedEntDecl(
+            String name, String pubid, String sysid, String notation)
+            throws Exception;
+
+    /**
+     * Notifies the handler about fatal parsing error.
+     *
+     * @param msg The problem description message.
+     */
+    protected abstract void panic(String msg)
+            throws Exception;
+
+    /**
+     * Reads a qualified xml name.
+     *
+     * This is low level routine which leaves a qName in the buffer. The
+     * characters of a qualified name is an array of characters. The first
+     * (chars[0]) character is the index of the colon character which separates
+     * the prefix from the local name. If the index is zero, the name does not
+     * contain separator or the parser works in the namespace unaware mode. The
+     * length of qualified name is the length of the array minus one.
+     *
+     * @param ns The true value turns namespace conformance on.
+     * @exception Exception is parser specific exception form panic method.
+     * @exception IOException
+     */
+    private void bname(boolean ns)
+            throws Exception {
+        char ch;
+        char type;
+        mBuffIdx++;  // allocate a char for colon offset
+        int bqname = mBuffIdx;
+        int bcolon = bqname;
+        int bchidx = bqname + 1;
+        int bstart = bchidx;
+        int cstart = mChIdx;
+        short st = (short) ((ns == true) ? 0 : 2);
+        while (true) {
+            //          Read next character
+            if (mChIdx >= mChLen) {
+                bcopy(cstart, bstart);
+                getch();
+                mChIdx--;  // bkch();
+                cstart = mChIdx;
+                bstart = bchidx;
+            }
+            ch = mChars[mChIdx++];
+            type = (char) 0;  // [X]
+            if (ch < 0x80) {
+                type = (char) nmttyp[ch];
+            } else if (ch == EOS) {
+                panic(FAULT);
+            }
+            //          Parse QName
+            switch (st) {
+                case 0:     // read the first char of the prefix
+                case 2:     // read the first char of the suffix
+                    switch (type) {
+                        case 0:  // [aA_X]
+                            bchidx++;  // append char to the buffer
+                            st++;      // (st == 0)? 1: 3;
+                            break;
+
+                        case 1:  // [:]
+                            mChIdx--;  // bkch();
+                            st++;      // (st == 0)? 1: 3;
+                            break;
+
+                        default:
+                            panic(FAULT);
+                    }
+                    break;
+
+                case 1:     // read the prefix
+                case 3:     // read the suffix
+                    switch (type) {
+                        case 0:  // [aA_X]
+                        case 2:  // [.-d]
+                            bchidx++;  // append char to the buffer
+                            break;
+
+                        case 1:  // [:]
+                            bchidx++;  // append char to the buffer
+                            if (ns == true) {
+                                if (bcolon != bqname) {
+                                    panic(FAULT);  // it must be only one colon
+                                }
+                                bcolon = bchidx - 1;
+                                if (st == 1) {
+                                    st = 2;
+                                }
+                            }
+                            break;
+
+                        default:
+                            mChIdx--;  // bkch();
+                            bcopy(cstart, bstart);
+                            mBuff[bqname] = (char) (bcolon - bqname);
+                            return;
+                    }
+                    break;
+
+                default:
+                    panic(FAULT);
+            }
+        }
+    }
+
+    /**
+     * Reads a nmtoken.
+     *
+     * This is low level routine which leaves a nmtoken in the buffer.
+     *
+     * @exception Exception is parser specific exception form panic method.
+     * @exception IOException
+     */
+    @SuppressWarnings("fallthrough")
+    private void bntok() throws Exception {
+        char ch;
+        mBuffIdx = -1;
+        bappend((char) 0);  // default offset to the colon char
+        while (true) {
+            ch = getch();
+            switch (chtyp(ch)) {
+                case 'a':
+                case 'A':
+                case 'd':
+                case '.':
+                case ':':
+                case '-':
+                case '_':
+                case 'X':
+                    bappend(ch);
+                    break;
+
+                case 'Z':
+                    panic(FAULT);
+
+                default:
+                    bkch();
+                    return;
+            }
+        }
+    }
+
+    /**
+     * Recognizes a keyword.
+     *
+     * This is low level routine which recognizes one of keywords in the buffer.
+     * Keyword Id ID - i IDREF - r IDREFS - R ENTITY - n ENTITIES - N NMTOKEN -
+     * t NMTOKENS - T ELEMENT - e ATTLIST - a NOTATION - o CDATA - c REQUIRED -
+     * Q IMPLIED - I FIXED - F
+     *
+     * @return an id of a keyword or '?'.
+     * @exception Exception is parser specific exception form panic method.
+     * @exception IOException
+     */
+    private char bkeyword()
+            throws Exception {
+        String str = new String(mBuff, 1, mBuffIdx);
+        switch (str.length()) {
+            case 2:  // ID
+                return ("ID".equals(str) == true) ? 'i' : '?';
+
+            case 5:  // IDREF, CDATA, FIXED
+                switch (mBuff[1]) {
+                    case 'I':
+                        return ("IDREF".equals(str) == true) ? 'r' : '?';
+                    case 'C':
+                        return ("CDATA".equals(str) == true) ? 'c' : '?';
+                    case 'F':
+                        return ("FIXED".equals(str) == true) ? 'F' : '?';
+                    default:
+                        break;
+                }
+                break;
+
+            case 6:  // IDREFS, ENTITY
+                switch (mBuff[1]) {
+                    case 'I':
+                        return ("IDREFS".equals(str) == true) ? 'R' : '?';
+                    case 'E':
+                        return ("ENTITY".equals(str) == true) ? 'n' : '?';
+                    default:
+                        break;
+                }
+                break;
+
+            case 7:  // NMTOKEN, IMPLIED, ATTLIST, ELEMENT
+                switch (mBuff[1]) {
+                    case 'I':
+                        return ("IMPLIED".equals(str) == true) ? 'I' : '?';
+                    case 'N':
+                        return ("NMTOKEN".equals(str) == true) ? 't' : '?';
+                    case 'A':
+                        return ("ATTLIST".equals(str) == true) ? 'a' : '?';
+                    case 'E':
+                        return ("ELEMENT".equals(str) == true) ? 'e' : '?';
+                    default:
+                        break;
+                }
+                break;
+
+            case 8:  // ENTITIES, NMTOKENS, NOTATION, REQUIRED
+                switch (mBuff[2]) {
+                    case 'N':
+                        return ("ENTITIES".equals(str) == true) ? 'N' : '?';
+                    case 'M':
+                        return ("NMTOKENS".equals(str) == true) ? 'T' : '?';
+                    case 'O':
+                        return ("NOTATION".equals(str) == true) ? 'o' : '?';
+                    case 'E':
+                        return ("REQUIRED".equals(str) == true) ? 'Q' : '?';
+                    default:
+                        break;
+                }
+                break;
+
+            default:
+                break;
+        }
+        return '?';
+    }
+
+    /**
+     * Reads a single or double quoted string into the buffer.
+     *
+     * This method resolves entities inside a string unless the parser parses
+     * DTD.
+     *
+     * @param flag 'c' - CDATA, 'i' - non CDATA, ' ' - no normalization; '-' -
+     * not an attribute value; 'd' - in DTD context.
+     * @exception Exception is parser specific exception form panic method.
+     * @exception IOException
+     */
+    @SuppressWarnings("fallthrough")
+    private void bqstr(char flag) throws Exception {
+        Input inp = mInp;  // remember the original input
+        mBuffIdx = -1;
+        bappend((char) 0);  // default offset to the colon char
+        char ch;
+        for (short st = 0; st >= 0;) {
+            ch = (mChIdx < mChLen) ? mChars[mChIdx++] : getch();
+            switch (st) {
+                case 0:     // read a single or double quote
+                    switch (ch) {
+                        case ' ':
+                        case '\n':
+                        case '\r':
+                        case '\t':
+                            break;
+
+                        case '\'':
+                            st = 2;  // read a single quoted string
+                            break;
+
+                        case '\"':
+                            st = 3;  // read a double quoted string
+                            break;
+
+                        default:
+                            panic(FAULT);
+                            break;
+                    }
+                    break;
+
+                case 2:     // read a single quoted string
+                case 3:     // read a double quoted string
+                    switch (ch) {
+                        case '\'':
+                            if ((st == 2) && (mInp == inp)) {
+                                st = -1;
+                            } else {
+                                bappend(ch);
+                            }
+                            break;
+
+                        case '\"':
+                            if ((st == 3) && (mInp == inp)) {
+                                st = -1;
+                            } else {
+                                bappend(ch);
+                            }
+                            break;
+
+                        case '&':
+                            if (flag != 'd') {
+                                ent(flag);
+                            } else {
+                                bappend(ch);
+                            }
+                            break;
+
+                        case '%':
+                            if (flag == 'd') {
+                                pent('-');
+                            } else {
+                                bappend(ch);
+                            }
+                            break;
+
+                        case '<':
+                            if ((flag == '-') || (flag == 'd')) {
+                                bappend(ch);
+                            } else {
+                                panic(FAULT);
+                            }
+                            break;
+
+                        case EOS:               // EOS before single/double quote
+                            panic(FAULT);
+
+                        case '\r':     // EOL processing [#2.11 & #3.3.3]
+                            if (flag != ' ' && mInp.next == null) {
+                                if (getch() != '\n') {
+                                    bkch();
+                                }
+                                ch = '\n';
+                            }
+                        default:
+                            bappend(ch, flag);
+                            break;
+                    }
+                    break;
+
+                default:
+                    panic(FAULT);
+            }
+        }
+        //              There is maximum one space at the end of the string in
+        //              i-mode (non CDATA normalization) and it has to be removed.
+        if ((flag == 'i') && (mBuff[mBuffIdx] == ' ')) {
+            mBuffIdx -= 1;
+        }
+    }
+
+    /**
+     * Reports characters and empties the parser's buffer. This method is called
+     * only if parser is going to return control to the main loop. This means
+     * that this method may use parser buffer to report white space without
+     * copying characters to temporary buffer.
+     */
+    protected abstract void bflash()
+            throws Exception;
+
+    /**
+     * Reports white space characters and empties the parser's buffer. This
+     * method is called only if parser is going to return control to the main
+     * loop. This means that this method may use parser buffer to report white
+     * space without copying characters to temporary buffer.
+     */
+    protected abstract void bflash_ws()
+            throws Exception;
+
+    /**
+     * Appends a character to parser's buffer with normalization.
+     *
+     * @param ch The character to append to the buffer.
+     * @param mode The normalization mode.
+     */
+    private void bappend(char ch, char mode) throws Exception {
+        //              This implements attribute value normalization as
+        //              described in the XML specification [#3.3.3].
+        switch (mode) {
+            case 'i':  // non CDATA normalization
+                switch (ch) {
+                    case ' ':
+                    case '\n':
+                    case '\r':
+                    case '\t':
+                        if ((mBuffIdx > 0) && (mBuff[mBuffIdx] != ' ')) {
+                            bappend(' ');
+                        }
+                        return;
+
+                    default:
+                        break;
+                }
+                break;
+
+            case 'c':  // CDATA normalization
+                switch (ch) {
+                    case '\n':
+                    case '\r':
+                    case '\t':
+                        ch = ' ';
+                        break;
+
+                    default:
+                        break;
+                }
+                break;
+
+            default:  // no normalization
+                break;
+        }
+        mBuffIdx++;
+        if (mBuffIdx < mBuff.length) {
+            mBuff[mBuffIdx] = ch;
+        } else {
+            mBuffIdx--;
+            bappend(ch);
+        }
+    }
+
+    /**
+     * Appends a character to parser's buffer.
+     *
+     * @param ch The character to append to the buffer.
+     */
+    private void bappend(char ch) throws Exception {
+        ensureCapacity(++mBuffIdx);
+        mBuff[mBuffIdx] = ch;
+    }
+
+    /**
+     * Appends (mChIdx - cidx) characters from character buffer (mChars) to
+     * parser's buffer (mBuff).
+     *
+     * @param cidx The character buffer (mChars) start index.
+     * @param bidx The parser buffer (mBuff) start index.
+     */
+    private void bcopy(int cidx, int bidx) throws Exception {
+        int length = mChIdx - cidx;
+        ensureCapacity(bidx + length + 1);
+        System.arraycopy(mChars, cidx, mBuff, bidx, length);
+        mBuffIdx += length;
+    }
+
+    /**
+     * Recognizes the built-in entities <i>lt</i>, <i>gt</i>, <i>amp</i>,
+     * <i>apos</i>, <i>quot</i>. The initial state is 0x100. Any state belowe
+     * 0x100 is a built-in entity replacement character.
+     *
+     * @param ch the next character of an entity name.
+     */
+    @SuppressWarnings("fallthrough")
+    private void eappend(char ch) {
+        switch (mESt) {
+            case 0x100:  // "l" or "g" or "a" or "q"
+                switch (ch) {
+                    case 'l':
+                        mESt = 0x101;
+                        break;
+                    case 'g':
+                        mESt = 0x102;
+                        break;
+                    case 'a':
+                        mESt = 0x103;
+                        break;
+                    case 'q':
+                        mESt = 0x107;
+                        break;
+                    default:
+                        mESt = 0x200;
+                        break;
+                }
+                break;
+
+            case 0x101:  // "lt"
+                mESt = (ch == 't') ? '<' : (char) 0x200;
+                break;
+
+            case 0x102:  // "gt"
+                mESt = (ch == 't') ? '>' : (char) 0x200;
+                break;
+
+            case 0x103:  // "am" or "ap"
+                switch (ch) {
+                    case 'm':
+                        mESt = 0x104;
+                        break;
+                    case 'p':
+                        mESt = 0x105;
+                        break;
+                    default:
+                        mESt = 0x200;
+                        break;
+                }
+                break;
+
+            case 0x104:  // "amp"
+                mESt = (ch == 'p') ? '&' : (char) 0x200;
+                break;
+
+            case 0x105:  // "apo"
+                mESt = (ch == 'o') ? (char) 0x106 : (char) 0x200;
+                break;
+
+            case 0x106:  // "apos"
+                mESt = (ch == 's') ? '\'' : (char) 0x200;
+                break;
+
+            case 0x107:  // "qu"
+                mESt = (ch == 'u') ? (char) 0x108 : (char) 0x200;
+                break;
+
+            case 0x108:  // "quo"
+                mESt = (ch == 'o') ? (char) 0x109 : (char) 0x200;
+                break;
+
+            case 0x109:  // "quot"
+                mESt = (ch == 't') ? '\"' : (char) 0x200;
+                break;
+
+            case '<':   // "lt"
+            case '>':   // "gt"
+            case '&':   // "amp"
+            case '\'':  // "apos"
+            case '\"':  // "quot"
+                mESt = 0x200;
+            default:
+                break;
+        }
+    }
+
+    /**
+     * Sets up a new input source on the top of the input stack. Note, the first
+     * byte returned by the entity's byte stream has to be the first byte in the
+     * entity. However, the parser does not expect the byte order mask in both
+     * cases when encoding is provided by the input source.
+     *
+     * @param is A new input source to set up.
+     * @exception IOException If any IO errors occur.
+     * @exception Exception is parser specific exception form panic method.
+     */
+    protected void setinp(InputSource is)
+            throws Exception {
+        Reader reader = null;
+        mChIdx = 0;
+        mChLen = 0;
+        mChars = mInp.chars;
+        mInp.src = null;
+        if (mPh < PH_DOC_START) {
+            mIsSAlone = false;  // default [#2.9]
+        }
+        mIsSAloneSet = false;
+        if (is.getCharacterStream() != null) {
+            //          Ignore encoding in the xml text decl.
+            reader = is.getCharacterStream();
+            xml(reader);
+        } else if (is.getByteStream() != null) {
+            String expenc;
+            if (is.getEncoding() != null) {
+                //              Ignore encoding in the xml text decl.
+                expenc = is.getEncoding().toUpperCase(Locale.ROOT);
+                if (expenc.equals("UTF-16")) {
+                    reader = bom(is.getByteStream(), 'U');  // UTF-16 [#4.3.3]
+                } else {
+                    reader = enc(expenc, is.getByteStream());
+                }
+                xml(reader);
+            } else {
+                //              Get encoding from BOM or the xml text decl.
+                reader = bom(is.getByteStream(), ' ');
+                /**
+                 * [#4.3.3] requires BOM for UTF-16, however, it's not uncommon
+                 * that it may be missing. A mature technique exists in Xerces
+                 * to further check for possible UTF-16 encoding
+                 */
+                if (reader == null) {
+                    reader = utf16(is.getByteStream());
+                }
+
+                if (reader == null) {
+                    //          Encoding is defined by the xml text decl.
+                    reader = enc("UTF-8", is.getByteStream());
+                    expenc = xml(reader);
+                    if (!expenc.equals("UTF-8")) {
+                        if (expenc.startsWith("UTF-16")) {
+                            panic(FAULT);  // UTF-16 must have BOM [#4.3.3]
+                        }
+                        reader = enc(expenc, is.getByteStream());
+                    }
+                } else {
+                    //          Encoding is defined by the BOM.
+                    xml(reader);
+                }
+            }
+        } else {
+            //          There is no support for public/system identifiers.
+            panic(FAULT);
+        }
+        mInp.src = reader;
+        mInp.pubid = is.getPublicId();
+        mInp.sysid = is.getSystemId();
+    }
+
+    /**
+     * Determines the entity encoding.
+     *
+     * This method gets encoding from Byte Order Mask [#4.3.3] if any. Note, the
+     * first byte returned by the entity's byte stream has to be the first byte
+     * in the entity. Also, there is no support for UCS-4.
+     *
+     * @param is A byte stream of the entity.
+     * @param hint An encoding hint, character U means UTF-16.
+     * @return a reader constructed from the BOM or UTF-8 by default.
+     * @exception Exception is parser specific exception form panic method.
+     * @exception IOException
+     */
+    private Reader bom(InputStream is, char hint)
+            throws Exception {
+        int val = is.read();
+        switch (val) {
+            case 0xef:     // UTF-8
+                if (hint == 'U') // must be UTF-16
+                {
+                    panic(FAULT);
+                }
+                if (is.read() != 0xbb) {
+                    panic(FAULT);
+                }
+                if (is.read() != 0xbf) {
+                    panic(FAULT);
+                }
+                return new ReaderUTF8(is);
+
+            case 0xfe:     // UTF-16, big-endian
+                if (is.read() != 0xff) {
+                    panic(FAULT);
+                }
+                return new ReaderUTF16(is, 'b');
+
+            case 0xff:     // UTF-16, little-endian
+                if (is.read() != 0xfe) {
+                    panic(FAULT);
+                }
+                return new ReaderUTF16(is, 'l');
+
+            case -1:
+                mChars[mChIdx++] = EOS;
+                return new ReaderUTF8(is);
+
+            default:
+                if (hint == 'U') // must be UTF-16
+                {
+                    panic(FAULT);
+                }
+                //              Read the rest of UTF-8 character
+                switch (val & 0xf0) {
+                    case 0xc0:
+                    case 0xd0:
+                        mChars[mChIdx++] = (char) (((val & 0x1f) << 6) | (is.read() & 0x3f));
+                        break;
+
+                    case 0xe0:
+                        mChars[mChIdx++] = (char) (((val & 0x0f) << 12)
+                                | ((is.read() & 0x3f) << 6) | (is.read() & 0x3f));
+                        break;
+
+                    case 0xf0:  // UCS-4 character
+                        throw new UnsupportedEncodingException();
+
+                    default:
+                        mChars[mChIdx++] = (char) val;
+                        break;
+                }
+                return null;
+        }
+    }
+
+
+    /**
+     * Using a mature technique from Xerces, this method checks further after
+     * the bom method above to see if the encoding is UTF-16
+     *
+     * @param is A byte stream of the entity.
+     * @return a reader, may be null
+     * @exception Exception is parser specific exception form panic method.
+     * @exception IOException
+     */
+    private Reader utf16(InputStream is)
+            throws Exception {
+        if (mChIdx != 0) {
+            // The bom method has read ONE byte into the buffer.
+            byte b0 = (byte)mChars[0];
+            if (b0 == 0x00 || b0 == 0x3C) {
+                int b1 = is.read();
+                int b2 = is.read();
+                int b3 = is.read();
+                if (b0 == 0x00 && b1 == 0x3C && b2 == 0x00 && b3 == 0x3F) {
+                    // UTF-16, big-endian, no BOM
+                    mChars[0] = (char)(b1);
+                    mChars[mChIdx++] = (char)(b3);
+                    return new ReaderUTF16(is, 'b');
+                } else if (b0 == 0x3C && b1 == 0x00 && b2 == 0x3F && b3 == 0x00) {
+                    // UTF-16, little-endian, no BOM
+                    mChars[0] = (char)(b0);
+                    mChars[mChIdx++] = (char)(b2);
+                    return new ReaderUTF16(is, 'l');
+                } else {
+                    /* not every InputStream supports reset, so we have to remember
+                     * the state for further parsing
+                     */
+                    mChars[0] = (char)(b0);
+                    mChars[mChIdx++] = (char)(b1);
+                    mChars[mChIdx++] = (char)(b2);
+                    mChars[mChIdx++] = (char)(b3);
+                }
+
+            }
+        }
+        return null;
+    }
+    /**
+     * Parses the xml text declaration.
+     *
+     * This method gets encoding from the xml text declaration [#4.3.1] if any.
+     * The method assumes the buffer (mChars) is big enough to accommodate whole
+     * xml text declaration.
+     *
+     * @param reader is entity reader.
+     * @return The xml text declaration encoding or default UTF-8 encoding.
+     * @exception Exception is parser specific exception form panic method.
+     * @exception IOException
+     */
+    private String xml(Reader reader)
+            throws Exception {
+        String str = null;
+        String enc = "UTF-8";
+        char ch;
+        int val;
+        short st = 0;
+        int byteRead =  mChIdx; //number of bytes read prior to entering this method
+
+        while (st >= 0 && mChIdx < mChars.length) {
+            if (st < byteRead) {
+                ch = mChars[st];
+            } else {
+                ch = ((val = reader.read()) >= 0) ? (char) val : EOS;
+                mChars[mChIdx++] = ch;
+            }
+
+            switch (st) {
+                case 0:     // read '<' of xml declaration
+                    switch (ch) {
+                        case '<':
+                            st = 1;
+                            break;
+
+                        case 0xfeff:    // the byte order mask
+                            ch = ((val = reader.read()) >= 0) ? (char) val : EOS;
+                            mChars[mChIdx - 1] = ch;
+                            st = (short) ((ch == '<') ? 1 : -1);
+                            break;
+
+                        default:
+                            st = -1;
+                            break;
+                    }
+                    break;
+
+                case 1:     // read '?' of xml declaration [#4.3.1]
+                    st = (short) ((ch == '?') ? 2 : -1);
+                    break;
+
+                case 2:     // read 'x' of xml declaration [#4.3.1]
+                    st = (short) ((ch == 'x') ? 3 : -1);
+                    break;
+
+                case 3:     // read 'm' of xml declaration [#4.3.1]
+                    st = (short) ((ch == 'm') ? 4 : -1);
+                    break;
+
+                case 4:     // read 'l' of xml declaration [#4.3.1]
+                    st = (short) ((ch == 'l') ? 5 : -1);
+                    break;
+
+                case 5:     // read white space after 'xml'
+                    switch (ch) {
+                        case ' ':
+                        case '\t':
+                        case '\r':
+                        case '\n':
+                            st = 6;
+                            break;
+
+                        default:
+                            st = -1;
+                            break;
+                    }
+                    break;
+
+                case 6:     // read content of xml declaration
+                    switch (ch) {
+                        case '?':
+                            st = 7;
+                            break;
+
+                        case EOS:
+                            st = -2;
+                            break;
+
+                        default:
+                            break;
+                    }
+                    break;
+
+                case 7:     // read '>' after '?' of xml declaration
+                    switch (ch) {
+                        case '>':
+                        case EOS:
+                            st = -2;
+                            break;
+
+                        default:
+                            st = 6;
+                            break;
+                    }
+                    break;
+
+                default:
+                    panic(FAULT);
+                    break;
+            }
+        }
+        mChLen = mChIdx;
+        mChIdx = 0;
+        //              If there is no xml text declaration, the encoding is default.
+        if (st == -1) {
+            return enc;
+        }
+        mChIdx = 5;  // the first white space after "<?xml"
+        //              Parse the xml text declaration
+        for (st = 0; st >= 0;) {
+            ch = getch();
+            switch (st) {
+                case 0:     // skip spaces after the xml declaration name
+                    if (chtyp(ch) != ' ') {
+                        bkch();
+                        st = 1;
+                    }
+                    break;
+
+                case 1:     // read xml declaration version
+                case 2:     // read xml declaration encoding or standalone
+                case 3:     // read xml declaration standalone
+                    switch (chtyp(ch)) {
+                        case 'a':
+                        case 'A':
+                        case '_':
+                            bkch();
+                            str = name(false).toLowerCase(Locale.ROOT);
+                            if ("version".equals(str) == true) {
+                                if (st != 1) {
+                                    panic(FAULT);
+                                }
+                                if ("1.0".equals(eqstr('=')) != true) {
+                                    panic(FAULT);
+                                }
+                                mInp.xmlver = 0x0100;
+                                st = 2;
+                            } else if ("encoding".equals(str) == true) {
+                                if (st != 2) {
+                                    panic(FAULT);
+                                }
+                                mInp.xmlenc = eqstr('=').toUpperCase(Locale.ROOT);
+                                enc = mInp.xmlenc;
+                                st = 3;
+                            } else if ("standalone".equals(str) == true) {
+                                if ((st == 1) || (mPh >= PH_DOC_START)) // [#4.3.1]
+                                {
+                                    panic(FAULT);
+                                }
+                                str = eqstr('=').toLowerCase(Locale.ROOT);
+                                //              Check the 'standalone' value and use it [#5.1]
+                                if (str.equals("yes") == true) {
+                                    mIsSAlone = true;
+                                } else if (str.equals("no") == true) {
+                                    mIsSAlone = false;
+                                } else {
+                                    panic(FAULT);
+                                }
+                                mIsSAloneSet = true;
+                                st = 4;
+                            } else {
+                                panic(FAULT);
+                            }
+                            break;
+
+                        case ' ':
+                            break;
+
+                        case '?':
+                            if (st == 1) {
+                                panic(FAULT);
+                            }
+                            bkch();
+                            st = 4;
+                            break;
+
+                        default:
+                            panic(FAULT);
+                    }
+                    break;
+
+                case 4:     // end of xml declaration
+                    switch (chtyp(ch)) {
+                        case '?':
+                            if (getch() != '>') {
+                                panic(FAULT);
+                            }
+                            if (mPh <= PH_DOC_START) {
+                                mPh = PH_MISC_DTD;  // misc before DTD
+                            }
+                            st = -1;
+                            break;
+
+                        case ' ':
+                            break;
+
+                        default:
+                            panic(FAULT);
+                    }
+                    break;
+
+                default:
+                    panic(FAULT);
+            }
+        }
+        return enc;
+    }
+
+    /**
+     * Sets up the document reader.
+     *
+     * @param name an encoding name.
+     * @param is the document byte input stream.
+     * @return a reader constructed from encoding name and input stream.
+     * @exception UnsupportedEncodingException
+     */
+    private Reader enc(String name, InputStream is)
+            throws UnsupportedEncodingException {
+        //              DO NOT CLOSE current reader if any!
+        if (name.equals("UTF-8")) {
+            return new ReaderUTF8(is);
+        } else if (name.equals("UTF-16LE")) {
+            return new ReaderUTF16(is, 'l');
+        } else if (name.equals("UTF-16BE")) {
+            return new ReaderUTF16(is, 'b');
+        } else {
+            return new InputStreamReader(is, name);
+        }
+    }
+
+    /**
+     * Sets up current input on the top of the input stack.
+     *
+     * @param inp A new input to set up.
+     */
+    protected void push(Input inp) {
+        mInp.chLen = mChLen;
+        mInp.chIdx = mChIdx;
+        inp.next = mInp;
+        mInp = inp;
+        mChars = inp.chars;
+        mChLen = inp.chLen;
+        mChIdx = inp.chIdx;
+    }
+
+    /**
+     * Restores previous input on the top of the input stack.
+     */
+    protected void pop() {
+        if (mInp.src != null) {
+            try {
+                mInp.src.close();
+            } catch (IOException ioe) {
+            }
+            mInp.src = null;
+        }
+        mInp = mInp.next;
+        if (mInp != null) {
+            mChars = mInp.chars;
+            mChLen = mInp.chLen;
+            mChIdx = mInp.chIdx;
+        } else {
+            mChars = null;
+            mChLen = 0;
+            mChIdx = 0;
+        }
+    }
+
+    /**
+     * Maps a character to its type.
+     *
+     * Possible character type values are:
+     * <ul>
+     * <li>' ' - for any kind of whitespace character;</li>
+     * <li>'a' - for any lower case alphabetical character value;</li>
+     * <li>'A' - for any upper case alphabetical character value;</li>
+     * <li>'d' - for any decimal digit character value;</li>
+     * <li>'z' - for any character less than ' ' except '\t', '\n', '\r';</li>
+     * <li>'X' - for any not ASCII character;</li>
+     * <li>'Z' - for EOS character.</li>
+     * </ul>
+     * An ASCII (7 bit) character which does not fall in any category
+     * listed above is mapped to itself.
+     *
+     * @param ch The character to map.
+     * @return The type of character.
+     */
+    protected char chtyp(char ch) {
+        if (ch < 0x80) {
+            return (char) asctyp[ch];
+        }
+        return (ch != EOS) ? 'X' : 'Z';
+    }
+
+    /**
+     * Retrieves the next character in the document.
+     *
+     * @return The next character in the document.
+     */
+    protected char getch()
+            throws IOException {
+        if (mChIdx >= mChLen) {
+            if (mInp.src == null) {
+                pop();  // remove internal entity
+                return getch();
+            }
+            //          Read new portion of the document characters
+            int Num = mInp.src.read(mChars, 0, mChars.length);
+            if (Num < 0) {
+                if (mInp != mDoc) {
+                    pop();  // restore the previous input
+                    return getch();
+                } else {
+                    mChars[0] = EOS;
+                    mChLen = 1;
+                }
+            } else {
+                mChLen = Num;
+            }
+            mChIdx = 0;
+        }
+        return mChars[mChIdx++];
+    }
+
+    /**
+     * Puts back the last read character.
+     *
+     * This method <strong>MUST NOT</strong> be called more then once after each
+     * call of {@link #getch getch} method.
+     */
+    protected void bkch()
+            throws Exception {
+        if (mChIdx <= 0) {
+            panic(FAULT);
+        }
+        mChIdx--;
+    }
+
+    /**
+     * Sets the current character.
+     *
+     * @param ch The character to set.
+     */
+    protected void setch(char ch) {
+        mChars[mChIdx] = ch;
+    }
+
+    /**
+     * Finds a pair in the pair chain by a qualified name.
+     *
+     * @param chain The first element of the chain of pairs.
+     * @param qname The qualified name.
+     * @return A pair with the specified qualified name or null.
+     */
+    protected Pair find(Pair chain, char[] qname) {
+        for (Pair pair = chain; pair != null; pair = pair.next) {
+            if (pair.eqname(qname) == true) {
+                return pair;
+            }
+        }
+        return null;
+    }
+
+    /**
+     * Provedes an instance of a pair.
+     *
+     * @param next The reference to a next pair.
+     * @return An instance of a pair.
+     */
+    protected Pair pair(Pair next) {
+        Pair pair;
+
+        if (mDltd != null) {
+            pair = mDltd;
+            mDltd = pair.next;
+        } else {
+            pair = new Pair();
+        }
+        pair.next = next;
+
+        return pair;
+    }
+
+    /**
+     * Deletes an instance of a pair.
+     *
+     * @param pair The pair to delete.
+     * @return A reference to the next pair in a chain.
+     */
+    protected Pair del(Pair pair) {
+        Pair next = pair.next;
+
+        pair.name = null;
+        pair.value = null;
+        pair.chars = null;
+        pair.list = null;
+        pair.next = mDltd;
+        mDltd = pair;
+
+        return next;
+    }
+
+    private void ensureCapacity(int minCapacity) throws Exception {
+        if (mBuff == null) {
+            int newCapacity = minCapacity > BUFFSIZE_PARSER ?
+                    minCapacity + BUFFSIZE_PARSER : BUFFSIZE_PARSER;
+            mBuff = new char[newCapacity];
+            return;
+        }
+
+        if (mBuff.length <= minCapacity) {
+            int size = mBuff.length << 1;
+            int newCapacity = size > minCapacity ? size : minCapacity + BUFFSIZE_PARSER;
+            if (newCapacity < 0 || newCapacity > MAX_ARRAY_SIZE) {
+                panic(FAULT);
+            }
+
+            mBuff = Arrays.copyOf(mBuff, newCapacity);
+        }
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/util/xml/impl/ParserSAX.class b/tests/test_data/std/jdk/internal/util/xml/impl/ParserSAX.class
new file mode 100644
index 0000000000000000000000000000000000000000..fb78b492d93201ad5f853b6bfd43a6021316dc95
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diff --git a/tests/test_data/std/jdk/internal/util/xml/impl/ParserSAX.java b/tests/test_data/std/jdk/internal/util/xml/impl/ParserSAX.java
new file mode 100644
index 00000000..927eb6d7
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/util/xml/impl/ParserSAX.java
@@ -0,0 +1,696 @@
+/*
+ * Copyright (c) 2012, 2022, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package jdk.internal.util.xml.impl;
+
+import java.io.IOException;
+import java.io.InputStream;
+import jdk.internal.org.xml.sax.ContentHandler;
+import jdk.internal.org.xml.sax.DTDHandler;
+import jdk.internal.org.xml.sax.EntityResolver;
+import jdk.internal.org.xml.sax.ErrorHandler;
+import jdk.internal.org.xml.sax.InputSource;
+import jdk.internal.org.xml.sax.Locator;
+import jdk.internal.org.xml.sax.SAXException;
+import jdk.internal.org.xml.sax.SAXParseException;
+import jdk.internal.org.xml.sax.XMLReader;
+import jdk.internal.org.xml.sax.helpers.DefaultHandler;
+
+/**
+ * XML non-validating push parser.
+ * <p>
+ * This non-validating parser conforms to <a href="http://www.w3.org/TR/REC-xml">
+ * Extensible Markup Language (XML) 1.0</a> and
+ * <a href="http://www.w3.org/TR/REC-xml-names" >Namespaces in XML</a>
+ * specifications. The API supported by the parser are
+ * <a href="https://www.oracle.com/technetwork/java/cldc-141990.html">CLDC</a> and
+ * <a href="http://www.jcp.org/en/jsr/detail?id=280">JSR-280</a>, a JavaME subset of
+ * <a href="https://www.oracle.com/technetwork/java/intro-140052.html">JAXP</a>
+ * and <a href="http://www.saxproject.org/">SAX2</a>.
+ *
+ * @see org.xml.sax.XMLReader
+ */
+
+final class ParserSAX
+    extends Parser implements XMLReader, Locator
+{
+    public static final String FEATURE_NS =
+            "http://xml.org/sax/features/namespaces";
+    public static final String FEATURE_PREF =
+            "http://xml.org/sax/features/namespace-prefixes";
+    //          SAX feature flags
+    private boolean mFNamespaces;
+    private boolean mFPrefixes;
+    //          SAX handlers
+    private DefaultHandler mHand;      // the default handler
+    private ContentHandler mHandCont;  // the content handler
+    private DTDHandler mHandDtd;   // the DTD handler
+    private ErrorHandler mHandErr;   // the error handler
+    private EntityResolver mHandEnt;   // the entity resolver
+
+    /**
+     * Constructor.
+     */
+    public ParserSAX() {
+        super();
+
+        //              SAX feature default values
+        mFNamespaces = true;
+        mFPrefixes = false;
+
+        //              Default handler which will be used in case the application
+        //              do not set one of handlers.
+        mHand = new DefaultHandler();
+        mHandCont = mHand;
+        mHandDtd = mHand;
+        mHandErr = mHand;
+        mHandEnt = mHand;
+    }
+
+    /**
+     * Return the current content handler.
+     *
+     * @return The current content handler, or null if none has been registered.
+     * @see #setContentHandler
+     */
+    public ContentHandler getContentHandler() {
+        return (mHandCont != mHand) ? mHandCont : null;
+    }
+
+    /**
+     * Allow an application to register a content event handler.
+     *
+     * <p>If the application does not register a content handler, all content
+     * events reported by the SAX parser will be silently ignored.</p>
+     *
+     * <p>Applications may register a new or different handler in the middle of
+     * a parse, and the SAX parser must begin using the new handler
+     * immediately.</p>
+     *
+     * @param handler The content handler.
+     * @exception java.lang.NullPointerException If the handler argument is
+     * null.
+     * @see #getContentHandler
+     */
+    public void setContentHandler(ContentHandler handler) {
+        if (handler == null) {
+            throw new NullPointerException();
+        }
+        mHandCont = handler;
+    }
+
+    /**
+     * Return the current DTD handler.
+     *
+     * @return The current DTD handler, or null if none has been registered.
+     * @see #setDTDHandler
+     */
+    public DTDHandler getDTDHandler() {
+        return (mHandDtd != mHand) ? mHandDtd : null;
+    }
+
+    /**
+     * Allow an application to register a DTD event handler.
+     *
+     * <p>If the application does not register a DTD handler, all DTD events
+     * reported by the SAX parser will be silently ignored.</p>
+     *
+     * <p>Applications may register a new or different handler in the middle of
+     * a parse, and the SAX parser must begin using the new handler
+     * immediately.</p>
+     *
+     * @param handler The DTD handler.
+     * @exception java.lang.NullPointerException If the handler argument is
+     * null.
+     * @see #getDTDHandler
+     */
+    public void setDTDHandler(DTDHandler handler) {
+        if (handler == null) {
+            throw new NullPointerException();
+        }
+        mHandDtd = handler;
+    }
+
+    /**
+     * Return the current error handler.
+     *
+     * @return The current error handler, or null if none has been registered.
+     * @see #setErrorHandler
+     */
+    public ErrorHandler getErrorHandler() {
+        return (mHandErr != mHand) ? mHandErr : null;
+    }
+
+    /**
+     * Allow an application to register an error event handler.
+     *
+     * <p>If the application does not register an error handler, all error
+     * events reported by the SAX parser will be silently ignored; however,
+     * normal processing may not continue. It is highly recommended that all SAX
+     * applications implement an error handler to avoid unexpected bugs.</p>
+     *
+     * <p>Applications may register a new or different handler in the middle of
+     * a parse, and the SAX parser must begin using the new handler
+     * immediately.</p>
+     *
+     * @param handler The error handler.
+     * @exception java.lang.NullPointerException If the handler argument is
+     * null.
+     * @see #getErrorHandler
+     */
+    public void setErrorHandler(ErrorHandler handler) {
+        if (handler == null) {
+            throw new NullPointerException();
+        }
+        mHandErr = handler;
+    }
+
+    /**
+     * Return the current entity resolver.
+     *
+     * @return The current entity resolver, or null if none has been registered.
+     * @see #setEntityResolver
+     */
+    public EntityResolver getEntityResolver() {
+        return (mHandEnt != mHand) ? mHandEnt : null;
+    }
+
+    /**
+     * Allow an application to register an entity resolver.
+     *
+     * <p>If the application does not register an entity resolver, the XMLReader
+     * will perform its own default resolution.</p>
+     *
+     * <p>Applications may register a new or different resolver in the middle of
+     * a parse, and the SAX parser must begin using the new resolver
+     * immediately.</p>
+     *
+     * @param resolver The entity resolver.
+     * @exception java.lang.NullPointerException If the resolver argument is
+     * null.
+     * @see #getEntityResolver
+     */
+    public void setEntityResolver(EntityResolver resolver) {
+        if (resolver == null) {
+            throw new NullPointerException();
+        }
+        mHandEnt = resolver;
+    }
+
+    /**
+     * Return the public identifier for the current document event.
+     *
+     * <p>The return value is the public identifier of the document entity or of
+     * the external parsed entity in which the markup triggering the event
+     * appears.</p>
+     *
+     * @return A string containing the public identifier, or null if none is
+     * available.
+     *
+     * @see #getSystemId
+     */
+    public String getPublicId() {
+        return (mInp != null) ? mInp.pubid : null;
+    }
+
+    /**
+     * Return the system identifier for the current document event.
+     *
+     * <p>The return value is the system identifier of the document entity or of
+     * the external parsed entity in which the markup triggering the event
+     * appears.</p>
+     *
+     * <p>If the system identifier is a URL, the parser must resolve it fully
+     * before passing it to the application.</p>
+     *
+     * @return A string containing the system identifier, or null if none is
+     * available.
+     *
+     * @see #getPublicId
+     */
+    public String getSystemId() {
+        return (mInp != null) ? mInp.sysid : null;
+    }
+
+    /**
+     * Return the line number where the current document event ends.
+     *
+     * @return Always returns -1 indicating the line number is not available.
+     *
+     * @see #getColumnNumber
+     */
+    public int getLineNumber() {
+        return -1;
+    }
+
+    /**
+     * Return the column number where the current document event ends.
+     *
+     * @return Always returns -1 indicating the column number is not available.
+     *
+     * @see #getLineNumber
+     */
+    public int getColumnNumber() {
+        return -1;
+    }
+
+    /**
+     * Parse an XML document from a system identifier (URI).
+     *
+     * <p>This method is a shortcut for the common case of reading a document
+     * from a system identifier. It is the exact equivalent of the
+     * following:</p>
+     *
+     * <pre>
+     * parse(new InputSource(systemId));
+     * </pre>
+     *
+     * <p>If the system identifier is a URL, it must be fully resolved by the
+     * application before it is passed to the parser.</p>
+     *
+     * @param systemId The system identifier (URI).
+     * @exception org.xml.sax.SAXException Any SAX exception, possibly wrapping
+     * another exception.
+     * @exception java.io.IOException An IO exception from the parser, possibly
+     * from a byte stream or character stream supplied by the application.
+     * @see #parse(org.xml.sax.InputSource)
+     */
+    public void parse(String systemId) throws IOException, SAXException {
+        parse(new InputSource(systemId));
+    }
+
+    /**
+     * Parse an XML document.
+     *
+     * <p>The application can use this method to instruct the XML reader to
+     * begin parsing an XML document from any valid input source (a character
+     * stream, a byte stream, or a URI).</p>
+     *
+     * <p>Applications may not invoke this method while a parse is in progress
+     * (they should create a new XMLReader instead for each nested XML
+     * document). Once a parse is complete, an application may reuse the same
+     * XMLReader object, possibly with a different input source.</p>
+     *
+     * <p>During the parse, the XMLReader will provide information about the XML
+     * document through the registered event handlers.</p>
+     *
+     * <p>This method is synchronous: it will not return until parsing has
+     * ended. If a client application wants to terminate parsing early, it
+     * should throw an exception.</p>
+     *
+     * @param is The input source for the top-level of the XML document.
+     * @exception org.xml.sax.SAXException Any SAX exception, possibly wrapping
+     * another exception.
+     * @exception java.io.IOException An IO exception from the parser, possibly
+     * from a byte stream or character stream supplied by the application.
+     * @see org.xml.sax.InputSource
+     * @see #parse(java.lang.String)
+     * @see #setEntityResolver
+     * @see #setDTDHandler
+     * @see #setContentHandler
+     * @see #setErrorHandler
+     */
+    public void parse(InputSource is) throws IOException, SAXException {
+        if (is == null) {
+            throw new IllegalArgumentException("");
+        }
+        //              Set up the document
+        mInp = new Input(BUFFSIZE_READER);
+        mPh = PH_BEFORE_DOC;  // before parsing
+        try {
+            setinp(is);
+        } catch (SAXException | IOException | RuntimeException e) {
+            throw e;
+        } catch (Exception e) {
+            panic(e.toString());
+        }
+        parse();
+    }
+
+    /**
+     * Parse the content of the given {@link java.io.InputStream} instance as
+     * XML using the specified {@link org.xml.sax.helpers.DefaultHandler}.
+     *
+     * @param src InputStream containing the content to be parsed.
+     * @param handler The SAX DefaultHandler to use.
+     * @exception IOException If any IO errors occur.
+     * @exception IllegalArgumentException If the given InputStream or handler
+     * is null.
+     * @exception SAXException If the underlying parser throws a SAXException
+     * while parsing.
+     * @see org.xml.sax.helpers.DefaultHandler
+     */
+    public void parse(InputStream src, DefaultHandler handler)
+            throws SAXException, IOException {
+        if ((src == null) || (handler == null)) {
+            throw new IllegalArgumentException("");
+        }
+        parse(new InputSource(src), handler);
+    }
+
+    /**
+     * Parse the content given {@link org.xml.sax.InputSource} as XML using the
+     * specified {@link org.xml.sax.helpers.DefaultHandler}.
+     *
+     * @param is The InputSource containing the content to be parsed.
+     * @param handler The SAX DefaultHandler to use.
+     * @exception IOException If any IO errors occur.
+     * @exception IllegalArgumentException If the InputSource or handler is
+     * null.
+     * @exception SAXException If the underlying parser throws a SAXException
+     * while parsing.
+     * @see org.xml.sax.helpers.DefaultHandler
+     */
+    public void parse(InputSource is, DefaultHandler handler)
+        throws SAXException, IOException
+    {
+        if ((is == null) || (handler == null)) {
+            throw new IllegalArgumentException("");
+        }
+        //              Set up the handler
+        mHandCont = handler;
+        mHandDtd = handler;
+        mHandErr = handler;
+        mHandEnt = handler;
+        //              Set up the document
+        mInp = new Input(BUFFSIZE_READER);
+        mPh = PH_BEFORE_DOC;  // before parsing
+        try {
+            setinp(is);
+        } catch (SAXException | IOException | RuntimeException saxe) {
+            throw saxe;
+        } catch (Exception e) {
+            panic(e.toString());
+        }
+        parse();
+    }
+
+    /**
+     * Parse the XML document content using specified handlers and an input
+     * source.
+     *
+     * @exception IOException If any IO errors occur.
+     * @exception SAXException If the underlying parser throws a SAXException
+     * while parsing.
+     */
+    @SuppressWarnings("fallthrough")
+    private void parse() throws SAXException, IOException {
+        init();
+        try {
+            mHandCont.setDocumentLocator(this);
+            mHandCont.startDocument();
+
+            if (mPh != PH_MISC_DTD) {
+                mPh = PH_MISC_DTD;  // misc before DTD
+            }
+            int evt = EV_NULL;
+            //          XML document prolog
+            do {
+                wsskip();
+                switch (evt = step()) {
+                    case EV_ELM:
+                    case EV_ELMS:
+                        mPh = PH_DOCELM;
+                        break;
+
+                    case EV_COMM:
+                    case EV_PI:
+                        break;
+
+                    case EV_DTD:
+                        if (mPh >= PH_DTD_MISC) {
+                            panic(FAULT);
+                        }
+                        mPh = PH_DTD_MISC;  // misc after DTD
+                        break;
+
+                    default:
+                        panic(FAULT);
+                }
+            } while (mPh < PH_DOCELM);  // misc before DTD
+            //          XML document starting with document's element
+            do {
+                switch (evt) {
+                    case EV_ELM:
+                    case EV_ELMS:
+                        //              Report the element
+                        if (mIsNSAware == true) {
+                            mHandCont.startElement(
+                                    mElm.value,
+                                    mElm.name,
+                                    "",
+                                    mAttrs);
+                        } else {
+                            mHandCont.startElement(
+                                    "",
+                                    "",
+                                    mElm.name,
+                                    mAttrs);
+                        }
+                        if (evt == EV_ELMS) {
+                            evt = step();
+                            break;
+                        }
+
+                    case EV_ELME:
+                        //              Report the end of element
+                        if (mIsNSAware == true) {
+                            mHandCont.endElement(mElm.value, mElm.name, "");
+                        } else {
+                            mHandCont.endElement("", "", mElm.name);
+                        }
+                        //              Restore the top of the prefix stack
+                        while (mPref.list == mElm) {
+                            mHandCont.endPrefixMapping(mPref.name);
+                            mPref = del(mPref);
+                        }
+                        //              Remove the top element tag
+                        mElm = del(mElm);
+                        if (mElm == null) {
+                            mPh = PH_DOCELM_MISC;
+                        } else {
+                            evt = step();
+                        }
+                        break;
+
+                    case EV_TEXT:
+                    case EV_WSPC:
+                    case EV_CDAT:
+                    case EV_COMM:
+                    case EV_PI:
+                    case EV_ENT:
+                        evt = step();
+                        break;
+
+                    default:
+                        panic(FAULT);
+                }
+            } while (mPh == PH_DOCELM);
+            //          Misc after document's element
+            do {
+                if (wsskip() == EOS) {
+                    break;
+                }
+
+                switch (step()) {
+                    case EV_COMM:
+                    case EV_PI:
+                        break;
+
+                    default:
+                        panic(FAULT);
+                }
+            } while (mPh == PH_DOCELM_MISC);
+            mPh = PH_AFTER_DOC;  // parsing is completed
+
+        } catch (SAXException | IOException | RuntimeException e) {
+            throw e;
+        } catch (Exception e) {
+            panic(e.toString());
+        } finally {
+            mHandCont.endDocument();
+            cleanup();
+        }
+    }
+
+    /**
+     * Reports document type.
+     *
+     * @param name The name of the entity.
+     * @param pubid The public identifier of the entity or <code>null</code>.
+     * @param sysid The system identifier of the entity or <code>null</code>.
+     */
+    protected void docType(String name, String pubid, String sysid) throws SAXException {
+        mHandDtd.startDTD(name, pubid, sysid);
+    }
+
+    /**
+     * Reports the start of DTD internal subset.
+     *
+     * @throws SAXException if the receiver throws SAXException
+     */
+    public void startInternalSub () throws SAXException {
+        mHandDtd.startInternalSub();
+    }
+
+    /**
+     * Reports a comment.
+     *
+     * @param text The comment text starting from first character.
+     * @param length The number of characters in comment.
+     */
+    protected void comm(char[] text, int length) {
+    }
+
+    /**
+     * Reports a processing instruction.
+     *
+     * @param target The processing instruction target name.
+     * @param body The processing instruction body text.
+     */
+    protected void pi(String target, String body) throws SAXException {
+        mHandCont.processingInstruction(target, body);
+    }
+
+    /**
+     * Reports new namespace prefix. The Namespace prefix (
+     * <code>mPref.name</code>) being declared and the Namespace URI (
+     * <code>mPref.value</code>) the prefix is mapped to. An empty string is
+     * used for the default element namespace, which has no prefix.
+     */
+    protected void newPrefix() throws SAXException {
+        mHandCont.startPrefixMapping(mPref.name, mPref.value);
+    }
+
+    /**
+     * Reports skipped entity name.
+     *
+     * @param name The entity name.
+     */
+    protected void skippedEnt(String name) throws SAXException {
+        mHandCont.skippedEntity(name);
+    }
+
+    /**
+     * Returns an
+     * <code>InputSource</code> for specified entity or
+     * <code>null</code>.
+     *
+     * @param name The name of the entity.
+     * @param pubid The public identifier of the entity.
+     * @param sysid The system identifier of the entity.
+     */
+    protected InputSource resolveEnt(String name, String pubid, String sysid)
+        throws SAXException, IOException
+    {
+        return mHandEnt.resolveEntity(pubid, sysid);
+    }
+
+    /**
+     * Reports notation declaration.
+     *
+     * @param name The notation's name.
+     * @param pubid The notation's public identifier, or null if none was given.
+     * @param sysid The notation's system identifier, or null if none was given.
+     */
+    protected void notDecl(String name, String pubid, String sysid)
+        throws SAXException
+    {
+        mHandDtd.notationDecl(name, pubid, sysid);
+    }
+
+    /**
+     * Reports unparsed entity name.
+     *
+     * @param name The unparsed entity's name.
+     * @param pubid The entity's public identifier, or null if none was given.
+     * @param sysid The entity's system identifier.
+     * @param notation The name of the associated notation.
+     */
+    protected void unparsedEntDecl(String name, String pubid, String sysid, String notation)
+        throws SAXException
+    {
+        mHandDtd.unparsedEntityDecl(name, pubid, sysid, notation);
+    }
+
+    /**
+     * Notifies the handler about fatal parsing error.
+     *
+     * @param msg The problem description message.
+     */
+    protected void panic(String msg) throws SAXException {
+        SAXParseException spe = new SAXParseException(msg, this);
+        mHandErr.fatalError(spe);
+        throw spe;  // [#1.2] fatal error definition
+    }
+
+    /**
+     * Reports characters and empties the parser's buffer. This method is called
+     * only if parser is going to return control to the main loop. This means
+     * that this method may use parser buffer to report white space without
+     * copying characters to temporary buffer.
+     */
+    protected void bflash() throws SAXException {
+        if (mBuffIdx >= 0) {
+            //          Textual data has been read
+            mHandCont.characters(mBuff, 0, (mBuffIdx + 1));
+            mBuffIdx = -1;
+        }
+    }
+
+    /**
+     * Reports white space characters and empties the parser's buffer. This
+     * method is called only if parser is going to return control to the main
+     * loop. This means that this method may use parser buffer to report white
+     * space without copying characters to temporary buffer.
+     */
+    protected void bflash_ws() throws SAXException {
+        if (mBuffIdx >= 0) {
+            // BUG: With additional info from DTD and xml:space attr [#2.10]
+            // the following call can be supported:
+            // mHandCont.ignorableWhitespace(mBuff, 0, (mBuffIdx + 1));
+
+            //          Textual data has been read
+            mHandCont.characters(mBuff, 0, (mBuffIdx + 1));
+            mBuffIdx = -1;
+        }
+    }
+
+    public boolean getFeature(String name) {
+        throw new UnsupportedOperationException("Not supported yet.");
+    }
+
+    public void setFeature(String name, boolean value) {
+        throw new UnsupportedOperationException("Not supported yet.");
+    }
+
+    public Object getProperty(String name) {
+        throw new UnsupportedOperationException("Not supported yet.");
+    }
+
+    public void setProperty(String name, Object value) {
+        throw new UnsupportedOperationException("Not supported yet.");
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/util/xml/impl/ReaderUTF16.class b/tests/test_data/std/jdk/internal/util/xml/impl/ReaderUTF16.class
new file mode 100644
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z@N<$ed_=Z2E{(=7DOVE5#$O#IigxY>Pro6?FHkMLgvkF&3AD*LpvmVLAD2(Ak4zr}
zf5KQ8PQJtkf0yzvkS<NUz~SdK$8d`8lSuIW8B0uZAm^#8;0!KNQ^f_;a2a3XV|ttj
zOX4)G@>5k1g_0yl4WCdRfxaVM4GbC>rB&0CM4iVt9f)0AmA8P7o3V;s`W@*^^Jh$D
z^};Xsk;lV-;OIgn{tSaz{U;={dLO#BHIaX$iEKQR*oa()u=C*IletH_=<ocaf-k>2
zII=QBHhv&@i(o<~Dj1-AgQu@y;v3$WX&lE*OyD-}@f|cULunR2U=GXp4iE7?9%E6l
zbAvZAkFzME#0D33B{sUt*d{Z5N;0JGEdAuTHgS%U9Oq+{Dd~#EF(kKPif!b@l)!%|
z>`9zUxDJzw)<Q@to-%{XH}#f>+B3wpEuIv^M{@_stM!rHV<i`oQp@eJF{Z}UCKJm@
zV}<LuO7tCEfv-9~64r~lOX8yHT`2qs#I}(Zg`xkU<#mtHR)}5lkO&bRliR4NZIpkO
Wzy{g8ud0}#UsPp(@8?y_7jFQSwfi0b

literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/util/xml/impl/ReaderUTF16.java b/tests/test_data/std/jdk/internal/util/xml/impl/ReaderUTF16.java
new file mode 100644
index 00000000..195b87db
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/util/xml/impl/ReaderUTF16.java
@@ -0,0 +1,122 @@
+/*
+ * Copyright (c) 2012, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package jdk.internal.util.xml.impl;
+
+import java.io.Reader;
+import java.io.InputStream;
+import java.io.IOException;
+
+/**
+ * UTF-16 encoded stream reader.
+ */
+public class ReaderUTF16 extends Reader {
+
+    private InputStream is;
+    private char bo;
+
+    /**
+     * Constructor.
+     *
+     * Byte order argument can be: 'l' for little-endian or 'b' for big-endian.
+     *
+     * @param is A byte input stream.
+     * @param bo A byte order in the input stream.
+     */
+    public ReaderUTF16(InputStream is, char bo) {
+        switch (bo) {
+            case 'l':
+                break;
+
+            case 'b':
+                break;
+
+            default:
+                throw new IllegalArgumentException("");
+        }
+        this.bo = bo;
+        this.is = is;
+    }
+
+    /**
+     * Reads characters into a portion of an array.
+     *
+     * @param cbuf Destination buffer.
+     * @param off Offset at which to start storing characters.
+     * @param len Maximum number of characters to read.
+     * @exception IOException If any IO errors occur.
+     */
+    public int read(char[] cbuf, int off, int len) throws IOException {
+        int num = 0;
+        int val;
+        if (bo == 'b') {
+            while (num < len) {
+                if ((val = is.read()) < 0) {
+                    return (num != 0) ? num : -1;
+                }
+                cbuf[off++] = (char) ((val << 8) | (is.read() & 0xff));
+                num++;
+            }
+        } else {
+            while (num < len) {
+                if ((val = is.read()) < 0) {
+                    return (num != 0) ? num : -1;
+                }
+                cbuf[off++] = (char) ((is.read() << 8) | (val & 0xff));
+                num++;
+            }
+        }
+        return num;
+    }
+
+    /**
+     * Reads a single character.
+     *
+     * @return The character read, as an integer in the range 0 to 65535
+     *  (0x0000-0xffff), or -1 if the end of the stream has been reached.
+     * @exception IOException If any IO errors occur.
+     */
+    public int read() throws IOException {
+        int val;
+        if ((val = is.read()) < 0) {
+            return -1;
+        }
+        if (bo == 'b') {
+            val = (char) ((val << 8) | (is.read() & 0xff));
+        } else {
+            val = (char) ((is.read() << 8) | (val & 0xff));
+        }
+        return val;
+    }
+
+    /**
+     * Closes the stream.
+     *
+     * @exception IOException If any IO errors occur.
+     */
+    public void close() throws IOException {
+        is.close();
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/util/xml/impl/ReaderUTF8.class b/tests/test_data/std/jdk/internal/util/xml/impl/ReaderUTF8.class
new file mode 100644
index 0000000000000000000000000000000000000000..d1cd736ffe05d3939d2a8ad41be27c986cce6464
GIT binary patch
literal 1415
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z_BuoyOoV!XYj2fu>VX`HR8=A*0*Us_i9ex7jy<CY_|AHrnjb>QnwdBAe$0EHdF!8l
z|KTS9Wt`OzLtKTDMgk)Oqqog9({Oy_x@|V>w!p}|<2k{3fq0=<Pa%nv3N4L8NDG|0
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zmg{$HfuoT*sSTG_tTXen-=IZi(edmn-R6qjUNTo)o{TN}mg&~bwj=k^p%Q!|Nu6H&
zUtH$|)WVH&rBbYr&6?>72ug~z(!ELMH_ANqZ&HlAw#V7)HU$n>1Jhc)Y__5+wF6!q
z6~^!bTs_bTXjQ-4w(JE*rk?4yhJ4x?`4D)ST@hn9@lx3rloZMdyu|r9cMCk1dabkz
zQJUI;`jERA@|;Hz=R8Y~w~)d)#sVh#)_4UcxT9YfmDRCFPEyC1!jkPu-ClfF(UoKO
z@u2h_)bDY4c{Z_$jIP{6QdhR1#J2Us5j^dE8-_xUi^B1k<28<7qV);a3dd89U~2MC
zOz4U1@m_XhJ&K#X(A&6M+rqm8Wu})+4=HK6@i)_nA2Gf>rtjkUN0HOr+8sq~{c%lK
zws}uHB=9yF0Pk_PKmwOo{rjx^11#Y(JY2!2xP~ur9rsYhChGVG%Xokfv4f98TIb1O
z9QSbwuaXIg9B|viX%t9Jo)xK;Z?K0Fr8s{(n4+YF6m)3&h>LwpigyIgOqNo~-xzF~
z4)Q5yLiA&O^!Sy|GSr~l<@rq{V%xa^<<-!ukGM!#B9`kDjtd+Tv6cG=-1#jSx$J*a
zrOhD;br&x_$~{9^Vv7K)Y(1ASJ<Jo@RkR7Mi;u8|4nE`jIUoOvp$6NCK&7aa@I;70
zLt-DJVp>0;{-u6?@lpM=w3JYj{pZd-Yi9Xh3Va0>Ux)Xk`*zVi!!%!~T?}Xb1o|Tn
A*8l(j

literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/util/xml/impl/ReaderUTF8.java b/tests/test_data/std/jdk/internal/util/xml/impl/ReaderUTF8.java
new file mode 100644
index 00000000..bd8e3213
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/util/xml/impl/ReaderUTF8.java
@@ -0,0 +1,138 @@
+/*
+ * Copyright (c) 2012, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package jdk.internal.util.xml.impl;
+
+import java.io.Reader;
+import java.io.InputStream;
+import java.io.IOException;
+import java.io.UnsupportedEncodingException;
+
+/**
+ * UTF-8 transformed UCS-2 character stream reader.
+ *
+ * This reader converts UTF-8 transformed UCS-2 characters to Java characters.
+ * The UCS-2 subset of UTF-8 transformation is described in RFC-2279 #2
+ * "UTF-8 definition":
+ *  0000 0000-0000 007F   0xxxxxxx
+ *  0000 0080-0000 07FF   110xxxxx 10xxxxxx
+ *  0000 0800-0000 FFFF   1110xxxx 10xxxxxx 10xxxxxx
+ *
+ * This reader will return incorrect last character on broken UTF-8 stream.
+ */
+public class ReaderUTF8 extends Reader {
+
+    private InputStream is;
+
+    /**
+     * Constructor.
+     *
+     * @param is A byte input stream.
+     */
+    public ReaderUTF8(InputStream is) {
+        this.is = is;
+    }
+
+    /**
+     * Reads characters into a portion of an array.
+     *
+     * @param cbuf Destination buffer.
+     * @param off Offset at which to start storing characters.
+     * @param len Maximum number of characters to read.
+     * @exception IOException If any IO errors occur.
+     * @exception UnsupportedEncodingException If UCS-4 character occur in the stream.
+     */
+    public int read(char[] cbuf, int off, int len) throws IOException {
+        int num = 0;
+        int val;
+        while (num < len) {
+            if ((val = is.read()) < 0) {
+                return (num != 0) ? num : -1;
+            }
+            switch (val & 0xf0) {
+                case 0xc0:
+                case 0xd0:
+                    cbuf[off++] = (char) (((val & 0x1f) << 6) | (is.read() & 0x3f));
+                    break;
+
+                case 0xe0:
+                    cbuf[off++] = (char) (((val & 0x0f) << 12)
+                            | ((is.read() & 0x3f) << 6) | (is.read() & 0x3f));
+                    break;
+
+                case 0xf0:      // UCS-4 character
+                    throw new UnsupportedEncodingException("UTF-32 (or UCS-4) encoding not supported.");
+
+                default:
+                    cbuf[off++] = (char) val;
+                    break;
+            }
+            num++;
+        }
+        return num;
+    }
+
+    /**
+     * Reads a single character.
+     *
+     * @return The character read, as an integer in the range 0 to 65535
+     *  (0x00-0xffff), or -1 if the end of the stream has been reached.
+     * @exception IOException If any IO errors occur.
+     * @exception UnsupportedEncodingException If UCS-4 character occur in the stream.
+     */
+    public int read() throws IOException {
+        int val;
+        if ((val = is.read()) < 0) {
+            return -1;
+        }
+        switch (val & 0xf0) {
+            case 0xc0:
+            case 0xd0:
+                val = ((val & 0x1f) << 6) | (is.read() & 0x3f);
+                break;
+
+            case 0xe0:
+                val = ((val & 0x0f) << 12)
+                        | ((is.read() & 0x3f) << 6) | (is.read() & 0x3f);
+                break;
+
+            case 0xf0:  // UCS-4 character
+                throw new UnsupportedEncodingException();
+
+            default:
+                break;
+        }
+        return val;
+    }
+
+    /**
+     * Closes the stream.
+     *
+     * @exception IOException If any IO errors occur.
+     */
+    public void close() throws IOException {
+        is.close();
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/util/xml/impl/SAXParserImpl.class b/tests/test_data/std/jdk/internal/util/xml/impl/SAXParserImpl.class
new file mode 100644
index 0000000000000000000000000000000000000000..4dbea2d838294c533e3af3c08abff310e675765a
GIT binary patch
literal 1403
zcmbVMU2oGc6g^HqvWBpgjqwc|Y%6Uy7Pcp(BBU`uRO$+%s2Y27Thn?ZX_Ta}AH@Sm
zgGnIq1Nc#h>of}KwC;h2IJV<+&b{aQ=J%f;zX0rF+kl3Qj;x6s@(fFdy$_ajL*cvJ
zwnm|}ts}>_T08r%xgQ9hA^%vqGJL|2DOcJ$W*An_#z@Drtucz=26SW!xByefMH91_
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zGH7x~1Rn2-xLS0_4k!>Aw7D&NJd|#qE?(ew85Ym17=u0-*Mebddbm@{r{e*`LUI#c
zrGnFxeWxy8+JJOD$%0l?*%vY@$b_+*iXL~V6Ex~TMkDnC&GIy-7Nqeet)3!7GoV;K
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zBuWl=lmh2s@IBhk($^Jw)=;8Rg|$s@g_uz^$0&ZLd75cA#Wa(IaX-Ot#CR=p8re)C
zwFF5`8Yj@8bXCHJQeNNqj?4e7Q2#K1qkvAtvOGQ+vk(SlGD^j5kXh?=T4k4~_X<=*
b)U4A~uANp1No6!eWfRKgX(|uti-xVgX0kJs

literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/util/xml/impl/SAXParserImpl.java b/tests/test_data/std/jdk/internal/util/xml/impl/SAXParserImpl.java
new file mode 100644
index 00000000..d73ca2a7
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/util/xml/impl/SAXParserImpl.java
@@ -0,0 +1,118 @@
+/*
+ * Copyright (c) 2012, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package jdk.internal.util.xml.impl;
+
+import java.io.IOException;
+import java.io.InputStream;
+import jdk.internal.org.xml.sax.InputSource;
+import jdk.internal.org.xml.sax.SAXException;
+import jdk.internal.org.xml.sax.XMLReader;
+import jdk.internal.org.xml.sax.helpers.DefaultHandler;
+import jdk.internal.util.xml.SAXParser;
+
+public class SAXParserImpl extends SAXParser {
+
+    private ParserSAX parser;
+
+    public SAXParserImpl() {
+        super();
+        parser = new ParserSAX();
+    }
+
+    /**
+     * Returns the {@link org.xml.sax.XMLReader} that is encapsulated by the
+     * implementation of this class.
+     *
+     * @return The XMLReader that is encapsulated by the
+     *         implementation of this class.
+     *
+     * @throws SAXException If any SAX errors occur during processing.
+     */
+    public XMLReader getXMLReader()
+            throws SAXException {
+        return parser;
+    }
+
+    /**
+     * Indicates whether or not this parser is configured to
+     * understand namespaces.
+     *
+     * @return true if this parser is configured to
+     *         understand namespaces; false otherwise.
+     */
+    public boolean isNamespaceAware() {
+        return parser.mIsNSAware;
+    }
+
+    /**
+     * Indicates whether or not this parser is configured to validate
+     * XML documents.
+     *
+     * @return true if this parser is configured to validate XML
+     *          documents; false otherwise.
+     */
+    public boolean isValidating() {
+        return false;
+    }
+
+    /**
+     * Parse the content of the given {@link java.io.InputStream}
+     * instance as XML using the specified
+     * {@link org.xml.sax.helpers.DefaultHandler}.
+     *
+     * @param src InputStream containing the content to be parsed.
+     * @param handler The SAX DefaultHandler to use.
+     * @exception IOException If any IO errors occur.
+     * @exception IllegalArgumentException If the given InputStream or handler is null.
+     * @exception SAXException If the underlying parser throws a
+     * SAXException while parsing.
+     * @see org.xml.sax.helpers.DefaultHandler
+     */
+    public void parse(InputStream src, DefaultHandler handler)
+        throws SAXException, IOException
+    {
+        parser.parse(src, handler);
+    }
+
+    /**
+     * Parse the content given {@link org.xml.sax.InputSource}
+     * as XML using the specified
+     * {@link org.xml.sax.helpers.DefaultHandler}.
+     *
+     * @param is The InputSource containing the content to be parsed.
+     * @param handler The SAX DefaultHandler to use.
+     * @exception IOException If any IO errors occur.
+     * @exception IllegalArgumentException If the InputSource or handler is null.
+     * @exception SAXException If the underlying parser throws a
+     * SAXException while parsing.
+     * @see org.xml.sax.helpers.DefaultHandler
+     */
+    public void parse(InputSource is, DefaultHandler handler)
+        throws SAXException, IOException
+    {
+        parser.parse(is, handler);
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/util/xml/impl/XMLStreamWriterImpl$Element.class b/tests/test_data/std/jdk/internal/util/xml/impl/XMLStreamWriterImpl$Element.class
new file mode 100644
index 0000000000000000000000000000000000000000..1b01db831129546ea22510341aa9a048fd87314d
GIT binary patch
literal 1351
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zWl}|Hh~%vHG2*QCG2tx!1w2pVVRRGV7Z^1{Oc@d83>6P?20+OWg2Y7{r)idOiNt83
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U(_O=jI973!Vv*qTsNxpv-)8s&z5oCK

literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/util/xml/impl/XMLStreamWriterImpl.class b/tests/test_data/std/jdk/internal/util/xml/impl/XMLStreamWriterImpl.class
new file mode 100644
index 0000000000000000000000000000000000000000..4b4058197c309ad4ac77417d7d98f7700306b417
GIT binary patch
literal 9680
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diff --git a/tests/test_data/std/jdk/internal/util/xml/impl/XMLStreamWriterImpl.java b/tests/test_data/std/jdk/internal/util/xml/impl/XMLStreamWriterImpl.java
new file mode 100644
index 00000000..2aff7560
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/util/xml/impl/XMLStreamWriterImpl.java
@@ -0,0 +1,658 @@
+/*
+ * Copyright (c) 2012, 2023, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package jdk.internal.util.xml.impl;
+
+import java.io.OutputStream;
+import java.io.UnsupportedEncodingException;
+import java.nio.charset.Charset;
+import java.nio.charset.IllegalCharsetNameException;
+import java.nio.charset.UnsupportedCharsetException;
+import jdk.internal.util.xml.XMLStreamException;
+import jdk.internal.util.xml.XMLStreamWriter;
+
+/**
+ * Implementation of a reduced version of XMLStreamWriter
+ *
+ * @author Joe Wang
+ */
+public class XMLStreamWriterImpl implements XMLStreamWriter {
+    //Document state
+
+    static final int STATE_XML_DECL = 1;
+    static final int STATE_PROLOG = 2;
+    static final int STATE_DTD_DECL = 3;
+    static final int STATE_ELEMENT = 4;
+    //Element state
+    static final int ELEMENT_STARTTAG_OPEN = 10;
+    static final int ELEMENT_STARTTAG_CLOSE = 11;
+    static final int ELEMENT_ENDTAG_OPEN = 12;
+    static final int ELEMENT_ENDTAG_CLOSE = 13;
+    public static final char CLOSE_START_TAG = '>';
+    public static final char OPEN_START_TAG = '<';
+    public static final String OPEN_END_TAG = "</";
+    public static final char CLOSE_END_TAG = '>';
+    public static final String START_CDATA = "<![CDATA[";
+    public static final String END_CDATA = "]]>";
+    public static final String CLOSE_EMPTY_ELEMENT = "/>";
+    public static final String ENCODING_PREFIX = "&#x";
+    public static final char SPACE = ' ';
+    public static final char AMPERSAND = '&';
+    public static final char DOUBLEQUOT = '"';
+    public static final char SEMICOLON = ';';
+    //current state
+    private int _state = 0;
+    private Element _currentEle;
+    private XMLWriter _writer;
+    private Charset _charset;
+    /**
+     * This flag can be used to turn escaping off for content. It does
+     * not apply to attribute content.
+     */
+    boolean _escapeCharacters = true;
+    //pretty print by default
+    private boolean _doIndent = true;
+    //The system line separator for writing out line breaks.
+    private char[] _lineSep = System.lineSeparator().toCharArray();
+
+    public XMLStreamWriterImpl(OutputStream os) throws XMLStreamException {
+        this(os, XMLStreamWriter.DEFAULT_CHARSET);
+    }
+
+    public XMLStreamWriterImpl(OutputStream os, Charset cs)
+        throws XMLStreamException
+    {
+        if (cs == null) {
+            _charset = XMLStreamWriter.DEFAULT_CHARSET;
+        } else {
+            try {
+                _charset = checkCharset(cs);
+            } catch (UnsupportedEncodingException e) {
+                throw new XMLStreamException(e);
+            }
+        }
+
+        _writer = new XMLWriter(os, null, _charset);
+    }
+
+    /**
+     * Write the XML Declaration. Defaults the XML version to 1.0, and the
+     * encoding to utf-8.
+     *
+     * @throws XMLStreamException
+     */
+    public void writeStartDocument() throws XMLStreamException {
+        writeStartDocument(_charset.name(), XMLStreamWriter.DEFAULT_XML_VERSION);
+    }
+
+    /**
+     * Write the XML Declaration. Defaults the encoding to utf-8
+     *
+     * @param version version of the xml document
+     * @throws XMLStreamException
+     */
+    public void writeStartDocument(String version) throws XMLStreamException {
+        writeStartDocument(_charset.name(), version, null);
+    }
+
+    /**
+     * Write the XML Declaration. Note that the encoding parameter does not set
+     * the actual encoding of the underlying output. That must be set when the
+     * instance of the XMLStreamWriter is created
+     *
+     * @param encoding encoding of the xml declaration
+     * @param version version of the xml document
+     * @throws XMLStreamException If given encoding does not match encoding of the
+     * underlying stream
+     */
+    public void writeStartDocument(String encoding, String version) throws XMLStreamException {
+        writeStartDocument(encoding, version, null);
+    }
+
+    /**
+     * Write the XML Declaration. Note that the encoding parameter does not set
+     * the actual encoding of the underlying output. That must be set when the
+     * instance of the XMLStreamWriter is created
+     *
+     * @param encoding encoding of the xml declaration
+     * @param version version of the xml document
+     * @param standalone indicate if the xml document is standalone
+     * @throws XMLStreamException If given encoding does not match encoding of the
+     * underlying stream
+     */
+    public void writeStartDocument(String encoding, String version, String standalone)
+        throws XMLStreamException
+    {
+        if (_state > 0) {
+            throw new XMLStreamException("XML declaration must be as the first line in the XML document.");
+        }
+        _state = STATE_XML_DECL;
+        String enc = encoding;
+        if (enc == null) {
+            enc = _charset.name();
+        } else {
+            //check if the encoding is supported
+            try {
+                getCharset(encoding);
+            } catch (UnsupportedEncodingException e) {
+                throw new XMLStreamException(e);
+            }
+        }
+
+        if (version == null) {
+            version = XMLStreamWriter.DEFAULT_XML_VERSION;
+        }
+
+        _writer.write("<?xml version=\"");
+        _writer.write(version);
+        _writer.write(DOUBLEQUOT);
+
+        if (enc != null) {
+            _writer.write(" encoding=\"");
+            _writer.write(enc);
+            _writer.write(DOUBLEQUOT);
+        }
+
+        if (standalone != null) {
+            _writer.write(" standalone=\"");
+            _writer.write(standalone);
+            _writer.write(DOUBLEQUOT);
+        }
+        _writer.write("?>");
+        writeLineSeparator();
+    }
+
+    /**
+     * Write a DTD section.  This string represents the entire doctypedecl production
+     * from the XML 1.0 specification.
+     *
+     * @param dtd the DTD to be written
+     * @throws XMLStreamException
+     */
+    public void writeDTD(String dtd) throws XMLStreamException {
+        if (_currentEle != null && _currentEle.getState() == ELEMENT_STARTTAG_OPEN) {
+            closeStartTag();
+        }
+        _writer.write(dtd);
+        writeLineSeparator();
+    }
+
+    /**
+     * Writes a start tag to the output.
+     * @param localName local name of the tag, may not be null
+     * @throws XMLStreamException
+     */
+    public void writeStartElement(String localName) throws XMLStreamException {
+        if (localName == null || localName.isEmpty()) {
+            throw new XMLStreamException("Local Name cannot be null or empty");
+        }
+
+        _state = STATE_ELEMENT;
+        if (_currentEle != null && _currentEle.getState() == ELEMENT_STARTTAG_OPEN) {
+            closeStartTag();
+        }
+
+        _currentEle = new Element(_currentEle, localName, false);
+        openStartTag();
+
+        _writer.write(localName);
+    }
+
+    /**
+     * Writes an empty element tag to the output
+     * @param localName local name of the tag, may not be null
+     * @throws XMLStreamException
+     */
+    public void writeEmptyElement(String localName) throws XMLStreamException {
+        if (_currentEle != null && _currentEle.getState() == ELEMENT_STARTTAG_OPEN) {
+            closeStartTag();
+        }
+
+        _currentEle = new Element(_currentEle, localName, true);
+
+        openStartTag();
+        _writer.write(localName);
+    }
+
+    /**
+     * Writes an attribute to the output stream without a prefix.
+     * @param localName the local name of the attribute
+     * @param value the value of the attribute
+     * @throws IllegalStateException if the current state does not allow Attribute writing
+     * @throws XMLStreamException
+     */
+    public void writeAttribute(String localName, String value) throws XMLStreamException {
+        if (_currentEle.getState() != ELEMENT_STARTTAG_OPEN) {
+            throw new XMLStreamException(
+                    "Attribute not associated with any element");
+        }
+
+        _writer.write(SPACE);
+        _writer.write(localName);
+        _writer.write("=\"");
+        writeXMLContent(
+                value,
+                true, // true = escapeChars
+                true);  // true = escapeDoubleQuotes
+        _writer.write(DOUBLEQUOT);
+    }
+
+    public void writeEndDocument() throws XMLStreamException {
+        if (_currentEle != null && _currentEle.getState() == ELEMENT_STARTTAG_OPEN) {
+            closeStartTag();
+        }
+
+        /**
+         * close unclosed elements if any
+         */
+        while (_currentEle != null) {
+
+            if (!_currentEle.isEmpty()) {
+                _writer.write(OPEN_END_TAG);
+                _writer.write(_currentEle.getLocalName());
+                _writer.write(CLOSE_END_TAG);
+            }
+
+            _currentEle = _currentEle.getParent();
+        }
+    }
+
+    public void writeEndElement() throws XMLStreamException {
+        if (_currentEle != null && _currentEle.getState() == ELEMENT_STARTTAG_OPEN) {
+            closeStartTag();
+        }
+
+        if (_currentEle == null) {
+            throw new XMLStreamException("No element was found to write");
+        }
+
+        if (_currentEle.isEmpty()) {
+            return;
+        }
+
+        _writer.write(OPEN_END_TAG);
+        _writer.write(_currentEle.getLocalName());
+        _writer.write(CLOSE_END_TAG);
+        writeLineSeparator();
+
+        _currentEle = _currentEle.getParent();
+    }
+
+    public void writeCData(String cdata) throws XMLStreamException {
+        if (cdata == null) {
+            throw new XMLStreamException("cdata cannot be null");
+        }
+
+        if (_currentEle != null && _currentEle.getState() == ELEMENT_STARTTAG_OPEN) {
+            closeStartTag();
+        }
+
+        _writer.write(START_CDATA);
+        _writer.write(cdata);
+        _writer.write(END_CDATA);
+    }
+
+    public void writeCharacters(String data) throws XMLStreamException {
+        if (_currentEle != null && _currentEle.getState() == ELEMENT_STARTTAG_OPEN) {
+            closeStartTag();
+        }
+
+        writeXMLContent(data);
+    }
+
+    public void writeCharacters(char[] data, int start, int len)
+            throws XMLStreamException {
+        if (_currentEle != null && _currentEle.getState() == ELEMENT_STARTTAG_OPEN) {
+            closeStartTag();
+        }
+
+        writeXMLContent(data, start, len, _escapeCharacters);
+    }
+
+    /**
+     * Close this XMLStreamWriter by closing underlying writer.
+     */
+    public void close() throws XMLStreamException {
+        if (_writer != null) {
+            _writer.close();
+        }
+        _writer = null;
+        _currentEle = null;
+        _state = 0;
+    }
+
+    /**
+     * Flush this XMLStreamWriter by flushing underlying writer.
+     */
+    public void flush() throws XMLStreamException {
+        if (_writer != null) {
+            _writer.flush();
+        }
+    }
+
+    /**
+     * Set the flag to indicate if the writer should add line separator
+     * @param doIndent
+     */
+    public void setDoIndent(boolean doIndent) {
+        _doIndent = doIndent;
+    }
+
+    /**
+     * Writes character reference in hex format.
+     */
+    private void writeCharRef(int codePoint) throws XMLStreamException {
+        _writer.write(ENCODING_PREFIX);
+        _writer.write(Integer.toHexString(codePoint));
+        _writer.write(SEMICOLON);
+    }
+
+    /**
+     * Writes XML content to underlying writer. Escapes characters unless
+     * escaping character feature is turned off.
+     */
+    private void writeXMLContent(char[] content, int start, int length, boolean escapeChars)
+        throws XMLStreamException
+    {
+        if (!escapeChars) {
+            _writer.write(content, start, length);
+            return;
+        }
+
+        // Index of the next char to be written
+        int startWritePos = start;
+
+        final int end = start + length;
+
+        for (int index = start; index < end; index++) {
+            char ch = content[index];
+
+            if (!_writer.canEncode(ch)) {
+                _writer.write(content, startWritePos, index - startWritePos);
+
+                // Check if current and next characters forms a surrogate pair
+                // and escape it to avoid generation of invalid xml content
+                if ( index != end - 1 && Character.isSurrogatePair(ch, content[index+1])) {
+                    writeCharRef(Character.toCodePoint(ch, content[index+1]));
+                    index++;
+                } else {
+                    writeCharRef(ch);
+                }
+
+                startWritePos = index + 1;
+                continue;
+            }
+
+            switch (ch) {
+                case OPEN_START_TAG:
+                    _writer.write(content, startWritePos, index - startWritePos);
+                    _writer.write("&lt;");
+                    startWritePos = index + 1;
+
+                    break;
+
+                case AMPERSAND:
+                    _writer.write(content, startWritePos, index - startWritePos);
+                    _writer.write("&amp;");
+                    startWritePos = index + 1;
+
+                    break;
+
+                case CLOSE_START_TAG:
+                    _writer.write(content, startWritePos, index - startWritePos);
+                    _writer.write("&gt;");
+                    startWritePos = index + 1;
+
+                    break;
+            }
+        }
+
+        // Write any pending data
+        _writer.write(content, startWritePos, end - startWritePos);
+    }
+
+    private void writeXMLContent(String content) throws XMLStreamException {
+        if (content != null && !content.isEmpty()) {
+            writeXMLContent(content,
+                    _escapeCharacters, // boolean = escapeChars
+                    false);             // false = escapeDoubleQuotes
+        }
+    }
+
+    /**
+     * Writes XML content to underlying writer. Escapes characters unless
+     * escaping character feature is turned off.
+     */
+    private void writeXMLContent(
+            String content,
+            boolean escapeChars,
+            boolean escapeDoubleQuotes)
+        throws XMLStreamException
+    {
+
+        if (!escapeChars) {
+            _writer.write(content);
+
+            return;
+        }
+
+        // Index of the next char to be written
+        int startWritePos = 0;
+
+        final int end = content.length();
+
+        for (int index = 0; index < end; index++) {
+            char ch = content.charAt(index);
+
+            if (!_writer.canEncode(ch)) {
+                _writer.write(content, startWritePos, index - startWritePos);
+
+                // Check if current and next characters forms a surrogate pair
+                // and escape it to avoid generation of invalid xml content
+                if ( index != end - 1 && Character.isSurrogatePair(ch, content.charAt(index+1))) {
+                    writeCharRef(Character.toCodePoint(ch, content.charAt(index+1)));
+                    index++;
+                } else {
+                    writeCharRef(ch);
+                }
+
+                startWritePos = index + 1;
+                continue;
+            }
+
+            switch (ch) {
+                case OPEN_START_TAG:
+                    _writer.write(content, startWritePos, index - startWritePos);
+                    _writer.write("&lt;");
+                    startWritePos = index + 1;
+
+                    break;
+
+                case AMPERSAND:
+                    _writer.write(content, startWritePos, index - startWritePos);
+                    _writer.write("&amp;");
+                    startWritePos = index + 1;
+
+                    break;
+
+                case CLOSE_START_TAG:
+                    _writer.write(content, startWritePos, index - startWritePos);
+                    _writer.write("&gt;");
+                    startWritePos = index + 1;
+
+                    break;
+
+                case DOUBLEQUOT:
+                    _writer.write(content, startWritePos, index - startWritePos);
+                    if (escapeDoubleQuotes) {
+                        _writer.write("&quot;");
+                    } else {
+                        _writer.write(DOUBLEQUOT);
+                    }
+                    startWritePos = index + 1;
+
+                    break;
+            }
+        }
+
+        // Write any pending data
+        _writer.write(content, startWritePos, end - startWritePos);
+    }
+
+    /**
+     * marks open of start tag and writes the same into the writer.
+     */
+    private void openStartTag() throws XMLStreamException {
+        _currentEle.setState(ELEMENT_STARTTAG_OPEN);
+        _writer.write(OPEN_START_TAG);
+    }
+
+    /**
+     * marks close of start tag and writes the same into the writer.
+     */
+    private void closeStartTag() throws XMLStreamException {
+        if (_currentEle.isEmpty()) {
+            _writer.write(CLOSE_EMPTY_ELEMENT);
+        } else {
+            _writer.write(CLOSE_START_TAG);
+
+        }
+
+        if (_currentEle.getParent() == null) {
+            writeLineSeparator();
+        }
+
+        _currentEle.setState(ELEMENT_STARTTAG_CLOSE);
+
+    }
+
+    /**
+     * Write a line separator
+     * @throws XMLStreamException
+     */
+    private void writeLineSeparator() throws XMLStreamException {
+        if (_doIndent) {
+            _writer.write(_lineSep, 0, _lineSep.length);
+        }
+    }
+
+    /**
+     * Returns a charset object for the specified encoding
+     * @param encoding
+     * @return a charset object
+     * @throws UnsupportedEncodingException if the encoding is not supported
+     */
+    private Charset getCharset(String encoding) throws UnsupportedEncodingException {
+        if (encoding.equalsIgnoreCase("UTF-32")) {
+            throw new UnsupportedEncodingException("The basic XMLWriter does "
+                    + "not support " + encoding);
+        }
+
+        Charset cs;
+        try {
+            cs = Charset.forName(encoding);
+        } catch (IllegalCharsetNameException | UnsupportedCharsetException ex) {
+            throw new UnsupportedEncodingException(encoding);
+        }
+        return cs;
+    }
+
+    /**
+     * Checks for charset support.
+     * @param charset the specified charset
+     * @return the charset
+     * @throws UnsupportedEncodingException if the charset is not supported
+     */
+    private Charset checkCharset(Charset charset) throws UnsupportedEncodingException {
+        if (charset.name().equalsIgnoreCase("UTF-32")) {
+            throw new UnsupportedEncodingException("The basic XMLWriter does "
+                    + "not support " + charset.name());
+        }
+        return charset;
+    }
+
+    /*
+     * Start of Internal classes.
+     *
+     */
+    protected static class Element {
+
+        /**
+         * the parent element
+         */
+        protected Element _parent;
+        /**
+         * indicate if an element is an empty one
+         */
+        boolean _isEmptyElement = false;
+        String _localpart;
+        int _state;
+
+        /**
+         * Default constructor.
+         */
+        public Element() {
+        }
+
+        /**
+         * @param parent the parent of the element
+         * @param localpart name of the element
+         * @param isEmpty indicate if the element is an empty one
+         */
+        public Element(Element parent, String localpart, boolean isEmpty) {
+            _parent = parent;
+            _localpart = localpart;
+            _isEmptyElement = isEmpty;
+        }
+
+        public Element getParent() {
+            return _parent;
+        }
+
+        public String getLocalName() {
+            return _localpart;
+        }
+
+        /**
+         * get the state of the element
+         */
+        public int getState() {
+            return _state;
+        }
+
+        /**
+         * Set the state of the element
+         *
+         * @param state the state of the element
+         */
+        public void setState(int state) {
+            _state = state;
+        }
+
+        public boolean isEmpty() {
+            return _isEmptyElement;
+        }
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/util/xml/impl/XMLWriter.class b/tests/test_data/std/jdk/internal/util/xml/impl/XMLWriter.class
new file mode 100644
index 0000000000000000000000000000000000000000..8c571b2adb4a09a9afea131cffd06415932d47cc
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diff --git a/tests/test_data/std/jdk/internal/util/xml/impl/XMLWriter.java b/tests/test_data/std/jdk/internal/util/xml/impl/XMLWriter.java
new file mode 100644
index 00000000..8ad1ed68
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/util/xml/impl/XMLWriter.java
@@ -0,0 +1,152 @@
+/*
+ * Copyright (c) 2012, 2022, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package jdk.internal.util.xml.impl;
+
+import java.io.BufferedOutputStream;
+import java.io.IOException;
+import java.io.OutputStream;
+import java.io.OutputStreamWriter;
+import java.io.UnsupportedEncodingException;
+import java.io.Writer;
+import java.nio.charset.Charset;
+import java.nio.charset.CharsetEncoder;
+import jdk.internal.util.xml.XMLStreamException;
+
+/**
+ *
+ * @author huizwang
+ */
+public class XMLWriter {
+
+    private Writer _writer;
+    /**
+     * In some cases, this charset encoder is used to determine if a char is
+     * encodable by underlying writer. For example, an 8-bit char from the
+     * extended ASCII set is not encodable by 7-bit ASCII encoder. Unencodable
+     * chars are escaped using XML numeric entities.
+     */
+    private CharsetEncoder _encoder = null;
+
+    public XMLWriter(OutputStream os, String encoding, Charset cs) throws XMLStreamException {
+        _encoder = cs.newEncoder();
+        try {
+            _writer = getWriter(os, encoding, cs);
+        } catch (UnsupportedEncodingException ex) {
+            throw new XMLStreamException(ex);
+        }
+
+    }
+
+    public boolean canEncode(char ch) {
+        if (_encoder == null) {
+            return false;
+        }
+        return (_encoder.canEncode(ch));
+    }
+
+    public void write(String s)
+            throws XMLStreamException {
+        try {
+            _writer.write(s.toCharArray());
+//            _writer.write(s.getBytes(Charset.forName(_encoding)));
+        } catch (IOException e) {
+            throw new XMLStreamException("I/O error", e);
+        }
+    }
+
+    public void write(String str, int off, int len)
+            throws XMLStreamException {
+        try {
+            _writer.write(str, off, len);
+        } catch (IOException e) {
+            throw new XMLStreamException("I/O error", e);
+        }
+
+    }
+
+    public void write(char[] cbuf, int off, int len)
+            throws XMLStreamException {
+        try {
+            _writer.write(cbuf, off, len);
+        } catch (IOException e) {
+            throw new XMLStreamException("I/O error", e);
+        }
+
+    }
+
+    void write(int b)
+            throws XMLStreamException {
+        try {
+            _writer.write(b);
+        } catch (IOException e) {
+            throw new XMLStreamException("I/O error", e);
+        }
+    }
+
+    void flush() throws XMLStreamException {
+        try {
+            _writer.flush();
+        } catch (IOException ex) {
+            throw new XMLStreamException(ex);
+        }
+    }
+
+    void close() throws XMLStreamException {
+        try {
+            _writer.close();
+        } catch (IOException ex) {
+            throw new XMLStreamException(ex);
+        }
+    }
+
+    private void nl() throws XMLStreamException {
+        String lineEnd = System.lineSeparator();
+        try {
+            _writer.write(lineEnd);
+        } catch (IOException e) {
+            throw new XMLStreamException("I/O error", e);
+        }
+    }
+
+    /**
+     * Returns a writer for the specified encoding based on an output stream.
+     *
+     * @param output The output stream
+     * @param encoding The encoding
+     * @return A suitable writer
+     * @throws UnsupportedEncodingException There is no converter to support
+     * this encoding
+     */
+    private Writer getWriter(OutputStream output, String encoding, Charset cs)
+        throws XMLStreamException, UnsupportedEncodingException
+    {
+        if (cs != null) {
+            return (new OutputStreamWriter(new BufferedOutputStream(output), cs));
+        }
+
+        return new OutputStreamWriter(new BufferedOutputStream(output), encoding);
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/vm/Continuation$Pinned.class b/tests/test_data/std/jdk/internal/vm/Continuation$Pinned.class
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diff --git a/tests/test_data/std/jdk/internal/vm/Continuation$PreemptStatus.class b/tests/test_data/std/jdk/internal/vm/Continuation$PreemptStatus.class
new file mode 100644
index 0000000000000000000000000000000000000000..e68a5ba0107d41875ebd89f97b756745824dce12
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new file mode 100644
index 0000000000000000000000000000000000000000..cddc3b3f7678ef2e78f489907aad7ab61d16da4e
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diff --git a/tests/test_data/std/jdk/internal/vm/Continuation.java b/tests/test_data/std/jdk/internal/vm/Continuation.java
new file mode 100644
index 00000000..5c1d41c3
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/vm/Continuation.java
@@ -0,0 +1,503 @@
+/*
+ * Copyright (c) 2018, 2023, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package jdk.internal.vm;
+
+import jdk.internal.misc.Unsafe;
+import jdk.internal.vm.annotation.DontInline;
+import jdk.internal.vm.annotation.IntrinsicCandidate;
+import sun.security.action.GetPropertyAction;
+
+import java.util.EnumSet;
+import java.util.Set;
+import java.util.function.Supplier;
+import jdk.internal.access.JavaLangAccess;
+import jdk.internal.access.SharedSecrets;
+import jdk.internal.vm.annotation.Hidden;
+
+/**
+ * A one-shot delimited continuation.
+ */
+public class Continuation {
+    private static final Unsafe U = Unsafe.getUnsafe();
+    private static final long MOUNTED_OFFSET = U.objectFieldOffset(Continuation.class, "mounted");
+    private static final boolean PRESERVE_SCOPED_VALUE_CACHE;
+    private static final JavaLangAccess JLA = SharedSecrets.getJavaLangAccess();
+    static {
+        ContinuationSupport.ensureSupported();
+
+        StackChunk.init(); // ensure StackChunk class is initialized
+
+        String value = GetPropertyAction.privilegedGetProperty("jdk.preserveScopedValueCache");
+        PRESERVE_SCOPED_VALUE_CACHE = (value == null) || Boolean.parseBoolean(value);
+    }
+
+    /** Reason for pinning */
+    public enum Pinned {
+        /** Native frame on stack */ NATIVE,
+        /** Monitor held */          MONITOR,
+        /** In critical section */   CRITICAL_SECTION }
+
+    /** Preemption attempt result */
+    public enum PreemptStatus {
+        /** Success */                                                      SUCCESS(null),
+        /** Permanent failure */                                            PERM_FAIL_UNSUPPORTED(null),
+        /** Permanent failure: continuation already yielding */             PERM_FAIL_YIELDING(null),
+        /** Permanent failure: continuation not mounted on the thread */    PERM_FAIL_NOT_MOUNTED(null),
+        /** Transient failure: continuation pinned due to a held CS */      TRANSIENT_FAIL_PINNED_CRITICAL_SECTION(Pinned.CRITICAL_SECTION),
+        /** Transient failure: continuation pinned due to native frame */   TRANSIENT_FAIL_PINNED_NATIVE(Pinned.NATIVE),
+        /** Transient failure: continuation pinned due to a held monitor */ TRANSIENT_FAIL_PINNED_MONITOR(Pinned.MONITOR);
+
+        final Pinned pinned;
+        private PreemptStatus(Pinned reason) { this.pinned = reason; }
+        /**
+         * Whether or not the continuation is pinned.
+         * @return whether or not the continuation is pinned
+         **/
+        public Pinned pinned() { return pinned; }
+    }
+
+    private static Pinned pinnedReason(int reason) {
+        return switch (reason) {
+            case 2 -> Pinned.CRITICAL_SECTION;
+            case 3 -> Pinned.NATIVE;
+            case 4 -> Pinned.MONITOR;
+            default -> throw new AssertionError("Unknown pinned reason: " + reason);
+        };
+    }
+
+    private static Thread currentCarrierThread() {
+        return JLA.currentCarrierThread();
+    }
+
+    static {
+        try {
+            registerNatives();
+
+            // init Pinned to avoid classloading during mounting
+            pinnedReason(2);
+        } catch (Exception e) {
+            throw new InternalError(e);
+        }
+    }
+
+    private final Runnable target;
+
+    /* While the native JVM code is aware that every continuation has a scope, it is, for the most part,
+     * oblivious to the continuation hierarchy. The only time this hierarchy is traversed in native code
+     * is when a hierarchy of continuations is mounted on the native stack.
+     */
+    private final ContinuationScope scope;
+    private Continuation parent; // null for native stack
+    private Continuation child; // non-null when we're yielded in a child continuation
+
+    private StackChunk tail;
+
+    private boolean done;
+    private volatile boolean mounted;
+    private Object yieldInfo;
+    private boolean preempted;
+
+    private Object[] scopedValueCache;
+
+    /**
+     * Constructs a continuation
+     * @param scope the continuation's scope, used in yield
+     * @param target the continuation's body
+     */
+    public Continuation(ContinuationScope scope, Runnable target) {
+        this.scope = scope;
+        this.target = target;
+    }
+
+    @Override
+    public String toString() {
+        return super.toString() + " scope: " + scope;
+    }
+
+    public ContinuationScope getScope() {
+        return scope;
+    }
+
+    public Continuation getParent() {
+        return parent;
+    }
+
+    /**
+     * Returns the current innermost continuation with the given scope
+     * @param scope the scope
+     * @return the continuation
+     */
+    public static Continuation getCurrentContinuation(ContinuationScope scope) {
+        Continuation cont = JLA.getContinuation(currentCarrierThread());
+        while (cont != null && cont.scope != scope)
+            cont = cont.parent;
+        return cont;
+    }
+
+    /**
+     * Creates a StackWalker for this continuation
+     * @return a new StackWalker
+     */
+    public StackWalker stackWalker() {
+        return stackWalker(EnumSet.noneOf(StackWalker.Option.class));
+    }
+
+    /**
+     * Creates a StackWalker for this continuation
+     * @param options the StackWalker's configuration options
+     * @return a new StackWalker
+     */
+    public StackWalker stackWalker(Set<StackWalker.Option> options) {
+        return stackWalker(options, this.scope);
+    }
+
+    /**
+     * Creates a StackWalker for this continuation and enclosing ones up to the given scope
+     * @param options the StackWalker's configuration options
+     * @param scope the delimiting continuation scope for the stack
+     * @return a new StackWalker
+     */
+    public StackWalker stackWalker(Set<StackWalker.Option> options, ContinuationScope scope) {
+        return JLA.newStackWalkerInstance(options, scope, innermost());
+    }
+
+    /**
+     * Obtains a stack trace for this unmounted continuation
+     * @return the stack trace
+     * @throws IllegalStateException if the continuation is mounted
+     */
+    public StackTraceElement[] getStackTrace() {
+        return stackWalker(EnumSet.of(StackWalker.Option.SHOW_REFLECT_FRAMES))
+            .walk(s -> s.map(StackWalker.StackFrame::toStackTraceElement)
+            .toArray(StackTraceElement[]::new));
+    }
+
+    /// Support for StackWalker
+    public static <R> R wrapWalk(Continuation inner, ContinuationScope scope, Supplier<R> walk) {
+        try {
+            for (Continuation c = inner; c != null && c.scope != scope; c = c.parent)
+                c.mount();
+            return walk.get();
+        } finally {
+            for (Continuation c = inner; c != null && c.scope != scope; c = c.parent)
+                c.unmount();
+        }
+    }
+
+    private Continuation innermost() {
+        Continuation c = this;
+        while (c.child != null)
+            c = c.child;
+        return c;
+    }
+
+    private void mount() {
+        if (!compareAndSetMounted(false, true))
+            throw new IllegalStateException("Mounted!!!!");
+    }
+
+    private void unmount() {
+        setMounted(false);
+    }
+
+    /**
+     * Mounts and runs the continuation body. If suspended, continues it from the last suspend point.
+     */
+    public final void run() {
+        while (true) {
+            mount();
+            JLA.setScopedValueCache(scopedValueCache);
+
+            if (done)
+                throw new IllegalStateException("Continuation terminated");
+
+            Thread t = currentCarrierThread();
+            if (parent != null) {
+                if (parent != JLA.getContinuation(t))
+                    throw new IllegalStateException();
+            } else
+                this.parent = JLA.getContinuation(t);
+            JLA.setContinuation(t, this);
+
+            try {
+                boolean isVirtualThread = (scope == JLA.virtualThreadContinuationScope());
+                if (!isStarted()) { // is this the first run? (at this point we know !done)
+                    enterSpecial(this, false, isVirtualThread);
+                } else {
+                    assert !isEmpty();
+                    enterSpecial(this, true, isVirtualThread);
+                }
+            } finally {
+                fence();
+                try {
+                    assert isEmpty() == done : "empty: " + isEmpty() + " done: " + done + " cont: " + Integer.toHexString(System.identityHashCode(this));
+                    JLA.setContinuation(currentCarrierThread(), this.parent);
+                    if (parent != null)
+                        parent.child = null;
+
+                    postYieldCleanup();
+
+                    unmount();
+                    if (PRESERVE_SCOPED_VALUE_CACHE) {
+                        scopedValueCache = JLA.scopedValueCache();
+                    } else {
+                        scopedValueCache = null;
+                    }
+                    JLA.setScopedValueCache(null);
+                } catch (Throwable e) { e.printStackTrace(); System.exit(1); }
+            }
+            // we're now in the parent continuation
+
+            assert yieldInfo == null || yieldInfo instanceof ContinuationScope;
+            if (yieldInfo == null || yieldInfo == scope) {
+                this.parent = null;
+                this.yieldInfo = null;
+                return;
+            } else {
+                parent.child = this;
+                parent.yield0((ContinuationScope)yieldInfo, this);
+                parent.child = null;
+            }
+        }
+    }
+
+    private void postYieldCleanup() {
+        if (done) {
+            this.tail = null;
+        }
+    }
+
+    private void finish() {
+        done = true;
+        assert isEmpty();
+    }
+
+    @IntrinsicCandidate
+    private static native int doYield();
+
+    @IntrinsicCandidate
+    private static native void enterSpecial(Continuation c, boolean isContinue, boolean isVirtualThread);
+
+
+    @Hidden
+    @DontInline
+    @IntrinsicCandidate
+    private static void enter(Continuation c, boolean isContinue) {
+        // This method runs in the "entry frame".
+        // A yield jumps to this method's caller as if returning from this method.
+        try {
+            c.enter0();
+        } finally {
+            c.finish();
+        }
+    }
+
+    @Hidden
+    private void enter0() {
+        target.run();
+    }
+
+    private boolean isStarted() {
+        return tail != null;
+    }
+
+    private boolean isEmpty() {
+        for (StackChunk c = tail; c != null; c = c.parent()) {
+            if (!c.isEmpty())
+                return false;
+        }
+        return true;
+    }
+
+    /**
+     * Suspends the current continuations up to the given scope
+     *
+     * @param scope The {@link ContinuationScope} to suspend
+     * @return {@code true} for success; {@code false} for failure
+     * @throws IllegalStateException if not currently in the given {@code scope},
+     */
+    @Hidden
+    public static boolean yield(ContinuationScope scope) {
+        Continuation cont = JLA.getContinuation(currentCarrierThread());
+        Continuation c;
+        for (c = cont; c != null && c.scope != scope; c = c.parent)
+            ;
+        if (c == null)
+            throw new IllegalStateException("Not in scope " + scope);
+
+        return cont.yield0(scope, null);
+    }
+
+    @Hidden
+    private boolean yield0(ContinuationScope scope, Continuation child) {
+        preempted = false;
+
+        if (scope != this.scope)
+            this.yieldInfo = scope;
+        int res = doYield();
+        U.storeFence(); // needed to prevent certain transformations by the compiler
+
+        assert scope != this.scope || yieldInfo == null : "scope: " + scope + " this.scope: " + this.scope + " yieldInfo: " + yieldInfo + " res: " + res;
+        assert yieldInfo == null || scope == this.scope || yieldInfo instanceof Integer : "scope: " + scope + " this.scope: " + this.scope + " yieldInfo: " + yieldInfo + " res: " + res;
+
+        if (child != null) { // TODO: ugly
+            if (res != 0) {
+                child.yieldInfo = res;
+            } else if (yieldInfo != null) {
+                assert yieldInfo instanceof Integer;
+                child.yieldInfo = yieldInfo;
+            } else {
+                child.yieldInfo = res;
+            }
+            this.yieldInfo = null;
+        } else {
+            if (res == 0 && yieldInfo != null) {
+                res = (Integer)yieldInfo;
+            }
+            this.yieldInfo = null;
+
+            if (res == 0)
+                onContinue();
+            else
+                onPinned0(res);
+        }
+        assert yieldInfo == null;
+
+        return res == 0;
+    }
+
+    private void onPinned0(int reason) {
+        onPinned(pinnedReason(reason));
+    }
+
+    /**
+     * Called when suspending if the continuation is pinned
+     * @param reason the reason for pinning
+     */
+    protected void onPinned(Pinned reason) {
+        throw new IllegalStateException("Pinned: " + reason);
+    }
+
+    /**
+     * Called when the continuation continues
+     */
+    protected void onContinue() {
+    }
+
+    /**
+     * Tests whether this continuation is completed
+     * @return whether this continuation is completed
+     */
+    public boolean isDone() {
+        return done;
+    }
+
+    /**
+     * Tests whether this unmounted continuation was unmounted by forceful preemption (a successful tryPreempt)
+     * @return whether this unmounted continuation was unmounted by forceful preemption
+     */
+    public boolean isPreempted() {
+        return preempted;
+    }
+
+    /**
+     * Pins the current continuation (enters a critical section).
+     * This increments an internal semaphore that, when greater than 0, pins the continuation.
+     */
+    public static native void pin();
+
+    /**
+     * Unpins the current continuation (exits a critical section).
+     * This decrements an internal semaphore that, when equal 0, unpins the current continuation
+     * if pinned with {@link #pin()}.
+     */
+    public static native void unpin();
+
+    /**
+     * Tests whether the given scope is pinned.
+     * This method is slow.
+     *
+     * @param scope the continuation scope
+     * @return {@code} true if we're in the give scope and are pinned; {@code false otherwise}
+     */
+    public static boolean isPinned(ContinuationScope scope) {
+        int res = isPinned0(scope);
+        return res != 0;
+    }
+
+    private static native int isPinned0(ContinuationScope scope);
+
+    private boolean fence() {
+        U.storeFence(); // needed to prevent certain transformations by the compiler
+        return true;
+    }
+
+    private boolean compareAndSetMounted(boolean expectedValue, boolean newValue) {
+        return U.compareAndSetBoolean(this, MOUNTED_OFFSET, expectedValue, newValue);
+    }
+
+    private void setMounted(boolean newValue) {
+        mounted = newValue; // MOUNTED.setVolatile(this, newValue);
+    }
+
+    private String id() {
+        return Integer.toHexString(System.identityHashCode(this))
+                + " [" + currentCarrierThread().threadId() + "]";
+    }
+
+    /**
+     * Tries to forcefully preempt this continuation if it is currently mounted on the given thread
+     * Subclasses may throw an {@link UnsupportedOperationException}, but this does not prevent
+     * the continuation from being preempted on a parent scope.
+     *
+     * @param thread the thread on which to forcefully preempt this continuation
+     * @return the result of the attempt
+     * @throws UnsupportedOperationException if this continuation does not support preemption
+     */
+    public PreemptStatus tryPreempt(Thread thread) {
+        throw new UnsupportedOperationException("Not implemented");
+    }
+
+    // native methods
+    private static native void registerNatives();
+
+    private void dump() {
+        System.out.println("Continuation@" + Long.toHexString(System.identityHashCode(this)));
+        System.out.println("\tparent: " + parent);
+        int i = 0;
+        for (StackChunk c = tail; c != null; c = c.parent()) {
+            System.out.println("\tChunk " + i);
+            System.out.println(c);
+        }
+    }
+
+    private static boolean isEmptyOrTrue(String property) {
+        String value = GetPropertyAction.privilegedGetProperty(property);
+        if (value == null)
+            return false;
+        return value.isEmpty() || Boolean.parseBoolean(value);
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/vm/ContinuationScope.class b/tests/test_data/std/jdk/internal/vm/ContinuationScope.class
new file mode 100644
index 0000000000000000000000000000000000000000..95c9f3c360d14790d53ab90fc093aca8f519e142
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literal 0
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diff --git a/tests/test_data/std/jdk/internal/vm/ContinuationScope.java b/tests/test_data/std/jdk/internal/vm/ContinuationScope.java
new file mode 100644
index 00000000..a101ba96
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/vm/ContinuationScope.java
@@ -0,0 +1,73 @@
+/*
+ * Copyright (c) 2018, 2022, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package jdk.internal.vm;
+
+import java.util.Objects;
+
+/**
+ * A Continuation scope.
+ */
+public class ContinuationScope {
+    final String name;
+
+    /**
+     * Constructs a new scope.
+     * @param name The scope's name
+     */
+    public ContinuationScope(String name) {
+        this.name = Objects.requireNonNull(name);
+    }
+
+    /**
+     * A constructor providing no name is available to subclasses.
+     */
+    protected ContinuationScope() {
+        this.name = getClass().getName();
+    }
+
+    /**
+     * Returns this scope's name.
+     * @return this scope's name
+     */
+    public final String getName() {
+        return name;
+    }
+
+    @Override
+    public final String toString() {
+        return name;
+    }
+
+    @Override
+    public final int hashCode() {
+        return super.hashCode();
+    }
+
+    @Override
+    public final boolean equals(Object obj) {
+        return super.equals(obj);
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/vm/ContinuationSupport.class b/tests/test_data/std/jdk/internal/vm/ContinuationSupport.class
new file mode 100644
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/vm/ContinuationSupport.java b/tests/test_data/std/jdk/internal/vm/ContinuationSupport.java
new file mode 100644
index 00000000..92d26b93
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/vm/ContinuationSupport.java
@@ -0,0 +1,54 @@
+/*
+ * Copyright (c) 2022, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package jdk.internal.vm;
+
+/**
+ * Defines a static method to test if the VM has continuations support.
+ */
+public class ContinuationSupport {
+    private static final boolean SUPPORTED = isSupported0();
+
+    private ContinuationSupport() {
+    }
+
+    /**
+     * Return true if the VM has continuations support.
+     */
+    public static boolean isSupported() {
+        return SUPPORTED;
+    }
+
+    /**
+     * Ensures that VM has continuations support.
+     * @throws UnsupportedOperationException if not supported
+     */
+    public static void ensureSupported() {
+        if (!isSupported()) {
+            throw new UnsupportedOperationException("VM does not support continuations");
+        }
+    }
+
+    private static native boolean isSupported0();
+}
diff --git a/tests/test_data/std/jdk/internal/vm/FillerObject.class b/tests/test_data/std/jdk/internal/vm/FillerObject.class
new file mode 100644
index 0000000000000000000000000000000000000000..a1b89c6be6bc4c85413826ccee791308070bdc1e
GIT binary patch
literal 293
zcmaJ+%WlFj5S$GuDS;B&Gm3gF9O@4MaY5n~!GVgqlUU$j9LWv*7bm11_<(*?)eS8Y
zCoFl!JNp>#_s`cEz!bd@9vT7s4j#}X^a^>9!brOoi?mQ#MQDz-)zyU1cpIz&JQDgv
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/vm/FillerObject.java b/tests/test_data/std/jdk/internal/vm/FillerObject.java
new file mode 100644
index 00000000..6224dd52
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/vm/FillerObject.java
@@ -0,0 +1,31 @@
+/*
+ * Copyright (c) 2022, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package jdk.internal.vm;
+
+/*
+ * Support class used for filling small dead areas.
+ */
+class FillerObject {
+}
diff --git a/tests/test_data/std/jdk/internal/vm/ForeignLinkerSupport.class b/tests/test_data/std/jdk/internal/vm/ForeignLinkerSupport.class
new file mode 100644
index 0000000000000000000000000000000000000000..d4912f2237deabc72398801f15565fa509534ba1
GIT binary patch
literal 506
zcma)2Jx{_=6g?LTrKJkuC&a{Pj6nyhag?~AOhkwv16wIC_@K0;6n>S9I%pjH0sbiC
zeb^WV2bcSO&$;(}e!YJHsG?*dfus)2LJDa@e(1~{+jIPZ-RKR48xhhK>C5PfkSrf}
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zTP_LNB}zi3;(GCaW-FM5uBb^xRs8FdQ>6~h`Thi}M<^*3IMO(0`M9#i*#&!IpE`L3
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/vm/ForeignLinkerSupport.java b/tests/test_data/std/jdk/internal/vm/ForeignLinkerSupport.java
new file mode 100644
index 00000000..cf8f1738
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/vm/ForeignLinkerSupport.java
@@ -0,0 +1,44 @@
+/*
+ * Copyright (c) 2023, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package jdk.internal.vm;
+
+/**
+ * Defines a static method to test if the VM has support for the foreign java.lang.foreign.Linker.
+ */
+public final class ForeignLinkerSupport {
+    private static final boolean SUPPORTED = isSupported0();
+
+    private ForeignLinkerSupport() {
+    }
+
+    /**
+     * Return true if the VM has support for the foreign Linker.
+     */
+    public static boolean isSupported() {
+        return SUPPORTED;
+    }
+
+    private static native boolean isSupported0();
+}
diff --git a/tests/test_data/std/jdk/internal/vm/ScopedValueContainer$BindingsSnapshot.class b/tests/test_data/std/jdk/internal/vm/ScopedValueContainer$BindingsSnapshot.class
new file mode 100644
index 0000000000000000000000000000000000000000..e46be74819cdcf88e460c2d3611e77e69bbfcece
GIT binary patch
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/vm/ScopedValueContainer.class b/tests/test_data/std/jdk/internal/vm/ScopedValueContainer.class
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/vm/ScopedValueContainer.java b/tests/test_data/std/jdk/internal/vm/ScopedValueContainer.java
new file mode 100644
index 00000000..1f15cfb0
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/vm/ScopedValueContainer.java
@@ -0,0 +1,213 @@
+/*
+ * Copyright (c) 2021, 2024, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package jdk.internal.vm;
+
+import java.lang.ScopedValue.CallableOp;
+import java.util.concurrent.StructureViolationException;
+import jdk.internal.access.JavaLangAccess;
+import jdk.internal.access.SharedSecrets;
+import jdk.internal.misc.Unsafe;
+
+/**
+ * A StackableScope to represent scoped-value bindings.
+ *
+ * This class defines static methods to run an operation with a ScopedValueContainer
+ * on the scope stack. It also defines a method to get the latest ScopedValueContainer
+ * and a method to return a snapshot of the scoped value bindings.
+ */
+public class ScopedValueContainer extends StackableScope {
+    private static final JavaLangAccess JLA = SharedSecrets.getJavaLangAccess();
+    static {
+        Unsafe.getUnsafe().ensureClassInitialized(StructureViolationException.class);
+    }
+
+    private ScopedValueContainer() {
+    }
+
+    /**
+     * Returns the "latest" ScopedValueContainer for the current Thread. This may be on
+     * the current thread's scope task or may require walking up the tree to find it.
+     */
+    public static <T extends ScopedValueContainer> T latest(Class<T> containerClass) {
+        StackableScope scope = head();
+        if (scope == null) {
+            scope = JLA.threadContainer(Thread.currentThread());
+            if (scope == null || scope.owner() == null)
+                return null;
+        }
+        if (containerClass.isInstance(scope)) {
+            @SuppressWarnings("unchecked")
+            T tmp = (T) scope;
+            return tmp;
+        } else {
+            return scope.enclosingScope(containerClass);
+        }
+    }
+
+    /**
+     * Returns the "latest" ScopedValueContainer for the current Thread. This
+     * may be on the current thread's scope task or may require walking up the
+     * tree to find it.
+     */
+    public static ScopedValueContainer latest() {
+        return latest(ScopedValueContainer.class);
+    }
+
+    /**
+     * A snapshot of the scoped value bindings. The snapshot includes the bindings
+     * established for the current thread and scoped value container.
+     */
+    public record BindingsSnapshot(Object scopedValueBindings,
+                                   ScopedValueContainer container) { }
+
+    /**
+     * Returns the scoped value bindings for the current thread.
+     */
+    public static BindingsSnapshot captureBindings() {
+        return new BindingsSnapshot(JLA.scopedValueBindings(), latest());
+    }
+
+    /**
+     * For use by ScopedValue to run an operation in a structured context.
+     */
+    public static void run(Runnable op) {
+        if (head() == null) {
+            // no need to push scope when stack is empty
+            runWithoutScope(op);
+        } else {
+            new ScopedValueContainer().doRun(op);
+        }
+    }
+
+    /**
+     * Run an operation without a scope on the stack.
+     */
+    private static void runWithoutScope(Runnable op) {
+        assert head() == null;
+        Throwable ex;
+        boolean atTop;
+        try {
+            op.run();
+            ex = null;
+        } catch (Throwable e) {
+            ex = e;
+        } finally {
+            atTop = (head() == null);
+            if (!atTop) popAll();   // may block
+        }
+        throwIfFailed(ex, atTop);
+    }
+
+    /**
+     * Run an operation with this scope on the stack.
+     */
+    private void doRun(Runnable op) {
+        Throwable ex;
+        boolean atTop;
+        push();
+        try {
+            op.run();
+            ex = null;
+        } catch (Throwable e) {
+            ex = e;
+        } finally {
+            atTop = popForcefully();  // may block
+        }
+        throwIfFailed(ex, atTop);
+    }
+
+    /**
+     * For use by ScopedValue to call a value returning operation in a structured context.
+     */
+    public static <V, X extends Throwable> V call(CallableOp<V, X> op) {
+        if (head() == null) {
+            // no need to push scope when stack is empty
+            return callWithoutScope(op);
+        } else {
+            return new ScopedValueContainer().doCall(op);
+        }
+    }
+
+    /**
+     * Call an operation without a scope on the stack.
+     */
+    private static <V, X extends Throwable> V callWithoutScope(CallableOp<V, X> op) {
+        assert head() == null;
+        Throwable ex;
+        boolean atTop;
+        V result;
+        try {
+            result = op.call();
+            ex = null;
+        } catch (Throwable e) {
+            result = null;
+            ex = e;
+        } finally {
+            atTop = (head() == null);
+            if (!atTop) popAll();  // may block
+        }
+        throwIfFailed(ex, atTop);
+        return result;
+    }
+
+    /**
+     * Call an operation with this scope on the stack.
+     */
+    private <V, X extends Throwable> V doCall(CallableOp<V, X> op) {
+        Throwable ex;
+        boolean atTop;
+        V result;
+        push();
+        try {
+            result = op.call();
+            ex = null;
+        } catch (Throwable e) {
+            result = null;
+            ex = e;
+        } finally {
+            atTop = popForcefully();  // may block
+        }
+        throwIfFailed(ex, atTop);
+        return result;
+    }
+
+    /**
+     * Throws {@code ex} if not null. StructureViolationException is thrown or added
+     * as a suppressed exception when {@code atTop} is false.
+     */
+    private static void throwIfFailed(Throwable ex, boolean atTop) {
+        if (ex != null || !atTop) {
+            if (!atTop) {
+                var sve = new StructureViolationException();
+                if (ex == null) {
+                    ex = sve;
+                } else {
+                    ex.addSuppressed(sve);
+                }
+            }
+            Unsafe.getUnsafe().throwException(ex);
+        }
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/vm/SharedThreadContainer.class b/tests/test_data/std/jdk/internal/vm/SharedThreadContainer.class
new file mode 100644
index 0000000000000000000000000000000000000000..96052590a818f7e39255e7fdfc5ea4ff05030efc
GIT binary patch
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/vm/SharedThreadContainer.java b/tests/test_data/std/jdk/internal/vm/SharedThreadContainer.java
new file mode 100644
index 00000000..36933ad6
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/vm/SharedThreadContainer.java
@@ -0,0 +1,166 @@
+/*
+ * Copyright (c) 2021, 2023, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package jdk.internal.vm;
+
+import java.lang.invoke.MethodHandles;
+import java.lang.invoke.VarHandle;
+import java.util.Set;
+import java.util.concurrent.ConcurrentHashMap;
+import java.util.stream.Stream;
+import jdk.internal.access.JavaLangAccess;
+import jdk.internal.access.SharedSecrets;
+
+/**
+ * A "shared" thread container. A shared thread container doesn't have an owner
+ * and is intended for unstructured uses, e.g. thread pools.
+ */
+public class SharedThreadContainer extends ThreadContainer implements AutoCloseable {
+    private static final JavaLangAccess JLA = SharedSecrets.getJavaLangAccess();
+    private static final VarHandle CLOSED;
+    private static final VarHandle VIRTUAL_THREADS;
+    static {
+        try {
+            MethodHandles.Lookup l = MethodHandles.lookup();
+            CLOSED = l.findVarHandle(SharedThreadContainer.class,
+                    "closed", boolean.class);
+            VIRTUAL_THREADS = l.findVarHandle(SharedThreadContainer.class,
+                    "virtualThreads", Set.class);
+        } catch (Exception e) {
+            throw new ExceptionInInitializerError(e);
+        }
+    }
+
+    // name of container, used by toString
+    private final String name;
+
+    // the virtual threads in the container, created lazily
+    private volatile Set<Thread> virtualThreads;
+
+    // the key for this container in the registry
+    private volatile Object key;
+
+    // set to true when the container is closed
+    private volatile boolean closed;
+
+    /**
+     * Initialize a new SharedThreadContainer.
+     * @param name the container name, can be null
+     */
+    private SharedThreadContainer(String name) {
+        super(/*shared*/ true);
+        this.name = name;
+    }
+
+    /**
+     * Creates a shared thread container with the given parent and name.
+     * @throws IllegalArgumentException if the parent has an owner.
+     */
+    public static SharedThreadContainer create(ThreadContainer parent, String name) {
+        if (parent.owner() != null)
+            throw new IllegalArgumentException("parent has owner");
+        var container = new SharedThreadContainer(name);
+        // register the container to allow discovery by serviceability tools
+        container.key = ThreadContainers.registerContainer(container);
+        return container;
+    }
+
+    /**
+     * Creates a shared thread container with the given name. Its parent will be
+     * the root thread container.
+     */
+    public static SharedThreadContainer create(String name) {
+        return create(ThreadContainers.root(), name);
+    }
+
+    @Override
+    public String name() {
+        return name;
+    }
+
+    @Override
+    public Thread owner() {
+        return null;
+    }
+
+    @Override
+    public void onStart(Thread thread) {
+        // virtual threads needs to be tracked
+        if (thread.isVirtual()) {
+            Set<Thread> vthreads = this.virtualThreads;
+            if (vthreads == null) {
+                vthreads = ConcurrentHashMap.newKeySet();
+                if (!VIRTUAL_THREADS.compareAndSet(this, null, vthreads)) {
+                    // lost the race
+                    vthreads = this.virtualThreads;
+                }
+            }
+            vthreads.add(thread);
+        }
+    }
+
+    @Override
+    public void onExit(Thread thread) {
+        if (thread.isVirtual())
+            virtualThreads.remove(thread);
+    }
+
+    @Override
+    public Stream<Thread> threads() {
+        // live platform threads in this container
+        Stream<Thread> platformThreads = Stream.of(JLA.getAllThreads())
+                .filter(t -> JLA.threadContainer(t) == this);
+        Set<Thread> vthreads = this.virtualThreads;
+        if (vthreads == null) {
+            // live platform threads only, no virtual threads
+            return platformThreads;
+        } else {
+            // all live threads in this container
+            return Stream.concat(platformThreads,
+                                 vthreads.stream().filter(Thread::isAlive));
+        }
+    }
+
+    /**
+     * Starts a thread in this container.
+     * @throws IllegalStateException if the container is closed
+     */
+    public void start(Thread thread) {
+        if (closed)
+            throw new IllegalStateException();
+        JLA.start(thread, this);
+    }
+
+    /**
+     * Closes this container. Further attempts to start a thread in this container
+     * throw IllegalStateException. This method has no impact on threads that are
+     * still running or starting around the time that this method is invoked.
+     */
+    @Override
+    public void close() {
+        if (!closed && CLOSED.compareAndSet(this, false, true)) {
+            ThreadContainers.deregisterContainer(key);
+        }
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/vm/StackChunk.class b/tests/test_data/std/jdk/internal/vm/StackChunk.class
new file mode 100644
index 0000000000000000000000000000000000000000..c98b570cdeafb142c98571129b0ac268a2f2ca5f
GIT binary patch
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/vm/StackChunk.java b/tests/test_data/std/jdk/internal/vm/StackChunk.java
new file mode 100644
index 00000000..ab562706
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/vm/StackChunk.java
@@ -0,0 +1,40 @@
+/*
+ * Copyright (c) 2019, 2022, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package jdk.internal.vm;
+
+public final class StackChunk {
+    public static void init() {}
+
+    private StackChunk parent;
+    private int size;    // in words
+    private int sp;      // in words
+    private int bottom;  // in words
+
+    // The stack itself is appended here by the VM, as well as some injected fields
+
+    public StackChunk parent() { return parent; }
+    public boolean isEmpty()   { return sp == bottom; }
+}
diff --git a/tests/test_data/std/jdk/internal/vm/StackableScope.class b/tests/test_data/std/jdk/internal/vm/StackableScope.class
new file mode 100644
index 0000000000000000000000000000000000000000..fda4db03b0ce8c60d9d90d57c5b250ed33c68b22
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diff --git a/tests/test_data/std/jdk/internal/vm/StackableScope.java b/tests/test_data/std/jdk/internal/vm/StackableScope.java
new file mode 100644
index 00000000..85a5646d
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/vm/StackableScope.java
@@ -0,0 +1,261 @@
+/*
+ * Copyright (c) 2021, 2022, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package jdk.internal.vm;
+
+import jdk.internal.access.JavaLangAccess;
+import jdk.internal.access.SharedSecrets;
+import jdk.internal.vm.annotation.DontInline;
+import jdk.internal.vm.annotation.ReservedStackAccess;
+
+/**
+ * A stackable scope to support structured constructs. The push method is used to
+ * push a StackableScope to the current thread's scope stack. The tryPop and
+ * popForcefully methods are used to pop the StackableScope from the current thread's
+ * scope stack.
+ */
+public class StackableScope {
+    private static final JavaLangAccess JLA = SharedSecrets.getJavaLangAccess();
+
+    private final Thread owner;
+    private volatile StackableScope previous;
+
+    /**
+     * Creates a stackable scope.
+     * @param shared true for a shared scope that cannot be pushed to the stack,
+     * false for scope that is owned by the current thread
+     */
+    StackableScope(boolean shared) {
+        if (shared) {
+            this.owner = null;
+        } else {
+            this.owner = Thread.currentThread();
+        }
+    }
+
+    /**
+     * Creates a stackable scope owned by the current thread.
+     */
+    protected StackableScope() {
+        this(false);
+    }
+
+    /**
+     * Returns the scope owner or null if not owned.
+     */
+    public Thread owner() {
+        return owner;
+    }
+
+    /**
+     * Pushes this scope onto the current thread's scope stack.
+     * @throws WrongThreadException it the current thread is not the owner
+     */
+    public StackableScope push() {
+        if (Thread.currentThread() != owner)
+            throw new WrongThreadException("Not owner");
+        previous = head();
+        setHead(this);
+        return this;
+    }
+
+    /**
+     * Pops this scope from the current thread's scope stack if the scope is
+     * at the top of stack.
+     * @return true if the pop succeeded, false if this scope is not the top of stack
+     * @throws WrongThreadException it the current thread is not the owner
+     */
+    @DontInline @ReservedStackAccess
+    public boolean tryPop() {
+        if (Thread.currentThread() != owner)
+            throw new WrongThreadException("Not owner");
+        if (head() == this) {
+            setHead(previous);
+            previous = null;
+            return true;
+        } else {
+            return false;
+        }
+    }
+
+    /**
+     * Pops this scope from the current thread's scope stack.
+     *
+     * For well-behaved usages, this scope is at the top of the stack. It is popped
+     * from the stack and the method returns {@code true}.
+     *
+     * If this scope is not at the top of the stack then this method attempts to
+     * close each of the intermediate scopes by invoking their {@link #tryClose()}
+     * method. If tryClose succeeds then the scope is removed from the stack. When
+     * done, this scope is removed from the stack and {@code false} is returned.
+     *
+     * This method does nothing, and returns {@code false}, if this scope is not
+     * on the current thread's scope stack.
+     *
+     * @return true if this scope was at the top of the stack, otherwise false
+     * @throws WrongThreadException it the current thread is not the owner
+     */
+    @DontInline @ReservedStackAccess
+    public boolean popForcefully() {
+        if (Thread.currentThread() != owner)
+            throw new WrongThreadException("Not owner");
+        final StackableScope head = head();
+        if (head == this) {
+            setHead(previous);
+            previous = null;
+            return true;
+        }
+
+        // scope is not the top of stack
+        if (contains(this)) {
+            StackableScope current = head;
+            while (current != this) {
+                StackableScope previous = current.previous();
+                // attempt to forcefully close the scope and remove from stack
+                if (current.tryClose()) {
+                    current.unlink();
+                }
+                current = previous;
+            }
+            unlink();
+        }
+        return false;
+    }
+
+    /**
+     * Pops all scopes from the current thread's scope stack.
+     */
+    public static void popAll() {
+        StackableScope head = head();
+        if (head != null) {
+            StackableScope current = head;
+            while (current != null) {
+                assert Thread.currentThread() == current.owner();
+                current.tryClose();
+                current = current.previous();
+            }
+            setHead(null);
+        }
+    }
+
+    /**
+     * Returns the scope that encloses this scope.
+     */
+    public StackableScope enclosingScope() {
+        StackableScope previous = this.previous;
+        if (previous != null)
+            return previous;
+        if (owner != null)
+            return JLA.threadContainer(owner);
+        return null;
+    }
+
+    /**
+     * Returns the scope of the given type that encloses this scope.
+     */
+    public <T extends StackableScope> T enclosingScope(Class<T> type) {
+        StackableScope current = enclosingScope();
+        while (current != null) {
+            if (type.isInstance(current)) {
+                @SuppressWarnings("unchecked")
+                T tmp = (T) current;
+                return tmp;
+            }
+            current = current.enclosingScope();
+        }
+        return null;
+    }
+
+    /**
+     * Returns the scope that directly encloses this scope, null if none.
+     */
+    StackableScope previous() {
+        return previous;
+    }
+
+    /**
+     * Returns the scope that this scope directly encloses, null if none.
+     */
+    private StackableScope next() {
+        assert contains(this);
+        StackableScope current = head();
+        StackableScope next = null;
+        while (current != this) {
+            next = current;
+            current = current.previous();
+        }
+        return next;
+    }
+
+    /**
+     * Override this method to close this scope and release its resources.
+     * This method should not pop the scope from the stack.
+     * This method is guaranteed to execute on the owner thread.
+     * @return true if this method closed the scope, false if it failed
+     */
+    protected boolean tryClose() {
+        assert Thread.currentThread() == owner;
+        return false;
+    }
+
+    /**
+     * Removes this scope from the current thread's scope stack.
+     */
+    private void unlink() {
+        assert contains(this);
+        StackableScope next = next();
+        if (next == null) {
+            setHead(previous);
+        } else {
+            next.previous = previous;
+        }
+        previous = null;
+    }
+
+    /**
+     * Returns true if the given scope is on the current thread's scope stack.
+     */
+    private static boolean contains(StackableScope scope) {
+        assert scope != null;
+        StackableScope current = head();
+        while (current != null && current != scope) {
+            current = current.previous();
+        }
+        return (current == scope);
+    }
+
+    /**
+     * Returns the head of the current thread's scope stack.
+     */
+    static StackableScope head() {
+        return JLA.headStackableScope(Thread.currentThread());
+    }
+
+    /**
+     * Sets the head (top) of the current thread's scope stack.
+     */
+    private static void setHead(StackableScope scope) {
+        JLA.setHeadStackableScope(scope);
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/vm/ThreadContainer.class b/tests/test_data/std/jdk/internal/vm/ThreadContainer.class
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diff --git a/tests/test_data/std/jdk/internal/vm/ThreadContainer.java b/tests/test_data/std/jdk/internal/vm/ThreadContainer.java
new file mode 100644
index 00000000..98a6c284
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/vm/ThreadContainer.java
@@ -0,0 +1,116 @@
+/*
+ * Copyright (c) 2021, 2023, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package jdk.internal.vm;
+
+import java.util.Objects;
+import java.util.stream.Stream;
+
+/**
+ * A container of threads.
+ */
+public abstract class ThreadContainer extends StackableScope {
+
+    /**
+     * Creates a ThreadContainer.
+     * @param shared true for a shared container, false for a container
+     * owned by the current thread
+     */
+    protected ThreadContainer(boolean shared) {
+        super(shared);
+    }
+
+    /**
+     * Return the name of this container, may be null.
+     */
+    public String name() {
+        return null;
+    }
+
+    /**
+     * Returns the parent of this container or null if this is the root container.
+     */
+    public ThreadContainer parent() {
+        return ThreadContainers.parent(this);
+    }
+
+    /**
+     * Return the stream of children of this container.
+     */
+    public final Stream<ThreadContainer> children() {
+        return ThreadContainers.children(this);
+    }
+
+    /**
+     * Return a count of the number of threads in this container.
+     */
+    public long threadCount() {
+        return threads().mapToLong(e -> 1L).sum();
+    }
+
+    /**
+     * Returns a stream of the live threads in this container.
+     */
+    public abstract Stream<Thread> threads();
+
+    /**
+     * Invoked by Thread::start before the given Thread is started.
+     */
+    public void onStart(Thread thread) {
+        // do nothing
+    }
+
+    /**
+     * Invoked when a Thread terminates or starting it fails.
+     *
+     * For a platform thread, this method is invoked by the thread itself when it
+     * terminates. For a virtual thread, this method is invoked on its carrier
+     * after the virtual thread has terminated.
+     *
+     * If starting the Thread failed then this method is invoked on the thread
+     * that invoked onStart.
+     */
+    public void onExit(Thread thread) {
+        // do nothing
+    }
+
+    /**
+     * The scoped values captured when the thread container was created.
+     */
+    public ScopedValueContainer.BindingsSnapshot scopedValueBindings() {
+        return null;
+    }
+
+    @Override
+    public String toString() {
+        String name = name();
+        if (name != null && name.indexOf('@') >= 0) {
+            return name;
+        } else {
+            String id = Objects.toIdentityString(this);
+            return (name != null) ? name + "/" + id : id;
+        }
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/vm/ThreadContainers$RootContainer$CountingRootContainer.class b/tests/test_data/std/jdk/internal/vm/ThreadContainers$RootContainer$CountingRootContainer.class
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diff --git a/tests/test_data/std/jdk/internal/vm/ThreadContainers$RootContainer$TrackingRootContainer.class b/tests/test_data/std/jdk/internal/vm/ThreadContainers$RootContainer$TrackingRootContainer.class
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diff --git a/tests/test_data/std/jdk/internal/vm/ThreadContainers$RootContainer.class b/tests/test_data/std/jdk/internal/vm/ThreadContainers$RootContainer.class
new file mode 100644
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diff --git a/tests/test_data/std/jdk/internal/vm/ThreadContainers.class b/tests/test_data/std/jdk/internal/vm/ThreadContainers.class
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diff --git a/tests/test_data/std/jdk/internal/vm/ThreadContainers.java b/tests/test_data/std/jdk/internal/vm/ThreadContainers.java
new file mode 100644
index 00000000..e1672feb
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/vm/ThreadContainers.java
@@ -0,0 +1,293 @@
+/*
+ * Copyright (c) 2021, 2023, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package jdk.internal.vm;
+
+import java.lang.ref.ReferenceQueue;
+import java.lang.ref.WeakReference;
+import java.util.Optional;
+import java.util.Set;
+import java.util.concurrent.ConcurrentHashMap;
+import java.util.concurrent.atomic.LongAdder;
+import java.util.stream.Stream;
+import jdk.internal.access.JavaLangAccess;
+import jdk.internal.access.SharedSecrets;
+import sun.security.action.GetPropertyAction;
+
+/**
+ * This class consists exclusively of static methods to support groupings of threads.
+ */
+public class ThreadContainers {
+    private static final JavaLangAccess JLA = SharedSecrets.getJavaLangAccess();
+
+    // true if all threads are tracked
+    private static final boolean TRACK_ALL_THREADS;
+
+    // the root container
+    private static final RootContainer ROOT_CONTAINER;
+
+    // the set of thread containers registered with this class
+    private static final Set<WeakReference<ThreadContainer>> CONTAINER_REGISTRY = ConcurrentHashMap.newKeySet();
+    private static final ReferenceQueue<Object> QUEUE = new ReferenceQueue<>();
+
+    static {
+        String s = GetPropertyAction.privilegedGetProperty("jdk.trackAllThreads");
+        if (s == null || s.isEmpty() || Boolean.parseBoolean(s)) {
+            TRACK_ALL_THREADS = true;
+            ROOT_CONTAINER = new RootContainer.TrackingRootContainer();
+        } else {
+            TRACK_ALL_THREADS = false;
+            ROOT_CONTAINER = new RootContainer.CountingRootContainer();
+        }
+    }
+
+    private ThreadContainers() { }
+
+    /**
+     * Expunge stale entries from the container registry.
+     */
+    private static void expungeStaleEntries() {
+        Object key;
+        while ((key = QUEUE.poll()) != null) {
+            CONTAINER_REGISTRY.remove(key);
+        }
+    }
+
+    /**
+     * Returns true if all threads are tracked.
+     */
+    public static boolean trackAllThreads() {
+        return TRACK_ALL_THREADS;
+    }
+
+    /**
+     * Registers a thread container to be tracked this class, returning a key
+     * that is used to remove it from the registry.
+     */
+    public static Object registerContainer(ThreadContainer container) {
+        expungeStaleEntries();
+        var ref = new WeakReference<>(container, QUEUE);
+        CONTAINER_REGISTRY.add(ref);
+        return ref;
+    }
+
+    /**
+     * Removes a thread container from being tracked by specifying the key
+     * returned when the thread container was registered.
+     */
+    public static void deregisterContainer(Object key) {
+        assert key instanceof WeakReference;
+        CONTAINER_REGISTRY.remove(key);
+    }
+
+    /**
+     * Returns the root thread container.
+     */
+    public static ThreadContainer root() {
+        return ROOT_CONTAINER;
+    }
+
+    /**
+     * Returns the parent of the given thread container.
+     *
+     * If the container has an owner then its parent is the enclosing container when
+     * nested, or the container that the owner is in, when not nested.
+     *
+     * If the container does not have an owner then the root container is returned,
+     * or null if called with the root container.
+     */
+    static ThreadContainer parent(ThreadContainer container) {
+        Thread owner = container.owner();
+        if (owner != null) {
+            ThreadContainer parent = container.enclosingScope(ThreadContainer.class);
+            if (parent != null)
+                return parent;
+            if ((parent = container(owner)) != null)
+                return parent;
+        }
+        ThreadContainer root = root();
+        return (container != root) ? root : null;
+    }
+
+    /**
+     * Returns given thread container's "children".
+     */
+    static Stream<ThreadContainer> children(ThreadContainer container) {
+        // children of registered containers
+        Stream<ThreadContainer> s1 = CONTAINER_REGISTRY.stream()
+                .map(WeakReference::get)
+                .filter(c -> c != null && c.parent() == container);
+
+        // container may enclose another container
+        Stream<ThreadContainer> s2 = Stream.empty();
+        if (container.owner() != null) {
+            ThreadContainer next = next(container);
+            if (next != null)
+                s2 = Stream.of(next);
+        }
+
+        // the top-most container owned by the threads in the container
+        Stream<ThreadContainer> s3 = container.threads()
+                .map(t -> Optional.ofNullable(top(t)))
+                .flatMap(Optional::stream);
+
+        return Stream.concat(s1, Stream.concat(s2, s3));
+    }
+
+    /**
+     * Returns the thread container that the given Thread is in or the root
+     * container if not started in a container.
+     * @throws IllegalStateException if the thread has not been started
+     */
+    public static ThreadContainer container(Thread thread) {
+        // thread container is set when the thread is started
+        if (thread.isAlive() || thread.getState() == Thread.State.TERMINATED) {
+            ThreadContainer container = JLA.threadContainer(thread);
+            return (container != null) ? container : root();
+        } else {
+            throw new IllegalStateException("Thread not started");
+        }
+    }
+
+    /**
+     * Returns the top-most thread container owned by the given thread.
+     */
+    private static ThreadContainer top(Thread thread) {
+        StackableScope current = JLA.headStackableScope(thread);
+        ThreadContainer top = null;
+        while (current != null) {
+            if (current instanceof ThreadContainer tc) {
+                top = tc;
+            }
+            current = current.previous();
+        }
+        return top;
+    }
+
+    /**
+     * Returns the thread container that the given thread container encloses.
+     */
+    private static ThreadContainer next(ThreadContainer container) {
+        StackableScope current = JLA.headStackableScope(container.owner());
+        if (current != null) {
+            ThreadContainer next = null;
+            while (current != null) {
+                if (current == container) {
+                    return next;
+                } else if (current instanceof ThreadContainer tc) {
+                    next = tc;
+                }
+                current = current.previous();
+            }
+        }
+        return null;
+    }
+
+    /**
+     * Root container that "contains" all platform threads not started in a container.
+     * It may include all virtual threads started directly with the Thread API.
+     */
+    private abstract static class RootContainer extends ThreadContainer {
+        protected RootContainer() {
+            super(true);
+        }
+        @Override
+        public ThreadContainer parent() {
+            return null;
+        }
+        @Override
+        public String name() {
+            return "<root>";
+        }
+        @Override
+        public StackableScope previous() {
+            return null;
+        }
+        @Override
+        public String toString() {
+            return name();
+        }
+
+        /**
+         * Returns the platform threads that are not in the container as these
+         * threads are considered to be in the root container.
+         */
+        protected Stream<Thread> platformThreads() {
+            return Stream.of(JLA.getAllThreads())
+                    .filter(t -> JLA.threadContainer(t) == null);
+        }
+
+        /**
+         * Root container that tracks all threads.
+         */
+        private static class TrackingRootContainer extends RootContainer {
+            private static final Set<Thread> VTHREADS = ConcurrentHashMap.newKeySet();
+            @Override
+            public void onStart(Thread thread) {
+                assert thread.isVirtual();
+                VTHREADS.add(thread);
+            }
+            @Override
+            public void onExit(Thread thread) {
+                assert thread.isVirtual();
+                VTHREADS.remove(thread);
+            }
+            @Override
+            public long threadCount() {
+                return platformThreads().count() + VTHREADS.size();
+            }
+            @Override
+            public Stream<Thread> threads() {
+                return Stream.concat(platformThreads(),
+                                     VTHREADS.stream().filter(Thread::isAlive));
+            }
+        }
+
+        /**
+         * Root container that tracks all platform threads and just keeps a
+         * count of the virtual threads.
+         */
+        private static class CountingRootContainer extends RootContainer {
+            private static final LongAdder VTHREAD_COUNT = new LongAdder();
+            @Override
+            public void onStart(Thread thread) {
+                assert thread.isVirtual();
+                VTHREAD_COUNT.add(1L);
+            }
+            @Override
+            public void onExit(Thread thread) {
+                assert thread.isVirtual();
+                VTHREAD_COUNT.add(-1L);
+            }
+            @Override
+            public long threadCount() {
+                return platformThreads().count() + VTHREAD_COUNT.sum();
+            }
+            @Override
+            public Stream<Thread> threads() {
+                return platformThreads();
+            }
+        }
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/vm/ThreadDumper$BoundedByteArrayOutputStream.class b/tests/test_data/std/jdk/internal/vm/ThreadDumper$BoundedByteArrayOutputStream.class
new file mode 100644
index 0000000000000000000000000000000000000000..e70be79ea50d41034e9909bb3722d32add485eb5
GIT binary patch
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literal 0
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diff --git a/tests/test_data/std/jdk/internal/vm/ThreadDumper.class b/tests/test_data/std/jdk/internal/vm/ThreadDumper.class
new file mode 100644
index 0000000000000000000000000000000000000000..37f2c928464dbc4d780bfa4fb0fa95a980ee7362
GIT binary patch
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/vm/ThreadDumper.java b/tests/test_data/std/jdk/internal/vm/ThreadDumper.java
new file mode 100644
index 00000000..d0705bc2
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/vm/ThreadDumper.java
@@ -0,0 +1,370 @@
+/*
+ * Copyright (c) 2020, 2023, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package jdk.internal.vm;
+
+import java.io.BufferedOutputStream;
+import java.io.ByteArrayOutputStream;
+import java.io.IOException;
+import java.io.OutputStream;
+import java.io.PrintStream;
+import java.nio.charset.StandardCharsets;
+import java.nio.file.FileAlreadyExistsException;
+import java.nio.file.Files;
+import java.nio.file.OpenOption;
+import java.nio.file.Path;
+import java.nio.file.StandardOpenOption;
+import java.time.Instant;
+import java.util.ArrayList;
+import java.util.Iterator;
+import java.util.List;
+
+/**
+ * Thread dump support.
+ *
+ * This class defines methods to dump threads to an output stream or file in plain
+ * text or JSON format.
+ */
+public class ThreadDumper {
+    private ThreadDumper() { }
+
+    // the maximum byte array to return when generating the thread dump to a byte array
+    private static final int MAX_BYTE_ARRAY_SIZE = 16_000;
+
+    /**
+     * Generate a thread dump in plain text format to a byte array or file, UTF-8 encoded.
+     *
+     * This method is invoked by the VM for the Thread.dump_to_file diagnostic command.
+     *
+     * @param file the file path to the file, null or "-" to return a byte array
+     * @param okayToOverwrite true to overwrite an existing file
+     * @return the UTF-8 encoded thread dump or message to return to the user
+     */
+    public static byte[] dumpThreads(String file, boolean okayToOverwrite) {
+        if (file == null || file.equals("-")) {
+            return dumpThreadsToByteArray(false, MAX_BYTE_ARRAY_SIZE);
+        } else {
+            return dumpThreadsToFile(file, okayToOverwrite, false);
+        }
+    }
+
+    /**
+     * Generate a thread dump in JSON format to a byte array or file, UTF-8 encoded.
+     *
+     * This method is invoked by the VM for the Thread.dump_to_file diagnostic command.
+     *
+     * @param file the file path to the file, null or "-" to return a byte array
+     * @param okayToOverwrite true to overwrite an existing file
+     * @return the UTF-8 encoded thread dump or message to return to the user
+     */
+    public static byte[] dumpThreadsToJson(String file, boolean okayToOverwrite) {
+        if (file == null || file.equals("-")) {
+            return dumpThreadsToByteArray(true, MAX_BYTE_ARRAY_SIZE);
+        } else {
+            return dumpThreadsToFile(file, okayToOverwrite, true);
+        }
+    }
+
+    /**
+     * Generate a thread dump in plain text or JSON format to a byte array, UTF-8 encoded.
+     */
+    private static byte[] dumpThreadsToByteArray(boolean json, int maxSize) {
+        try (var out = new BoundedByteArrayOutputStream(maxSize);
+             PrintStream ps = new PrintStream(out, true, StandardCharsets.UTF_8)) {
+            if (json) {
+                dumpThreadsToJson(ps);
+            } else {
+                dumpThreads(ps);
+            }
+            return out.toByteArray();
+        }
+    }
+
+    /**
+     * Generate a thread dump in plain text or JSON format to the given file, UTF-8 encoded.
+     */
+    private static byte[] dumpThreadsToFile(String file, boolean okayToOverwrite, boolean json) {
+        Path path = Path.of(file).toAbsolutePath();
+        OpenOption[] options = (okayToOverwrite)
+                ? new OpenOption[0]
+                : new OpenOption[] { StandardOpenOption.CREATE_NEW };
+        String reply;
+        try (OutputStream out = Files.newOutputStream(path, options);
+             BufferedOutputStream bos = new BufferedOutputStream(out);
+             PrintStream ps = new PrintStream(bos, false, StandardCharsets.UTF_8)) {
+            if (json) {
+                dumpThreadsToJson(ps);
+            } else {
+                dumpThreads(ps);
+            }
+            reply = String.format("Created %s%n", path);
+        } catch (FileAlreadyExistsException e) {
+            reply = String.format("%s exists, use -overwrite to overwrite%n", path);
+        } catch (IOException ioe) {
+            reply = String.format("Failed: %s%n", ioe);
+        }
+        return reply.getBytes(StandardCharsets.UTF_8);
+    }
+
+    /**
+     * Generate a thread dump in plain text format to the given output stream,
+     * UTF-8 encoded.
+     *
+     * This method is invoked by HotSpotDiagnosticMXBean.dumpThreads.
+     */
+    public static void dumpThreads(OutputStream out) {
+        BufferedOutputStream bos = new BufferedOutputStream(out);
+        PrintStream ps = new PrintStream(bos, false, StandardCharsets.UTF_8);
+        try {
+            dumpThreads(ps);
+        } finally {
+            ps.flush();  // flushes underlying stream
+        }
+    }
+
+    /**
+     * Generate a thread dump in plain text format to the given print stream.
+     */
+    private static void dumpThreads(PrintStream ps) {
+        ps.println(processId());
+        ps.println(Instant.now());
+        ps.println(Runtime.version());
+        ps.println();
+        dumpThreads(ThreadContainers.root(), ps);
+    }
+
+    private static void dumpThreads(ThreadContainer container, PrintStream ps) {
+        container.threads().forEach(t -> dumpThread(t, ps));
+        container.children().forEach(c -> dumpThreads(c, ps));
+    }
+
+    private static void dumpThread(Thread thread, PrintStream ps) {
+        String suffix = thread.isVirtual() ? " virtual" : "";
+        ps.println("#" + thread.threadId() + " \"" + thread.getName() + "\"" + suffix);
+        for (StackTraceElement ste : thread.getStackTrace()) {
+            ps.print("      ");
+            ps.println(ste);
+        }
+        ps.println();
+    }
+
+    /**
+     * Generate a thread dump in JSON format to the given output stream, UTF-8 encoded.
+     *
+     * This method is invoked by HotSpotDiagnosticMXBean.dumpThreads.
+     */
+    public static void dumpThreadsToJson(OutputStream out) {
+        BufferedOutputStream bos = new BufferedOutputStream(out);
+        PrintStream ps = new PrintStream(bos, false, StandardCharsets.UTF_8);
+        try {
+            dumpThreadsToJson(ps);
+        } finally {
+            ps.flush();  // flushes underlying stream
+        }
+    }
+
+    /**
+     * Generate a thread dump to the given print stream in JSON format.
+     */
+    private static void dumpThreadsToJson(PrintStream out) {
+        out.println("{");
+        out.println("  \"threadDump\": {");
+
+        String now = Instant.now().toString();
+        String runtimeVersion = Runtime.version().toString();
+        out.format("    \"processId\": \"%d\",%n", processId());
+        out.format("    \"time\": \"%s\",%n", escape(now));
+        out.format("    \"runtimeVersion\": \"%s\",%n", escape(runtimeVersion));
+
+        out.println("    \"threadContainers\": [");
+        List<ThreadContainer> containers = allContainers();
+        Iterator<ThreadContainer> iterator = containers.iterator();
+        while (iterator.hasNext()) {
+            ThreadContainer container = iterator.next();
+            boolean more = iterator.hasNext();
+            dumpThreadsToJson(container, out, more);
+        }
+        out.println("    ]");   // end of threadContainers
+
+        out.println("  }");   // end threadDump
+        out.println("}");  // end object
+    }
+
+    /**
+     * Dump the given thread container to the print stream in JSON format.
+     */
+    private static void dumpThreadsToJson(ThreadContainer container,
+                                          PrintStream out,
+                                          boolean more) {
+        out.println("      {");
+        out.format("        \"container\": \"%s\",%n", escape(container.toString()));
+
+        ThreadContainer parent = container.parent();
+        if (parent == null) {
+            out.format("        \"parent\": null,%n");
+        } else {
+            out.format("        \"parent\": \"%s\",%n", escape(parent.toString()));
+        }
+
+        Thread owner = container.owner();
+        if (owner == null) {
+            out.format("        \"owner\": null,%n");
+        } else {
+            out.format("        \"owner\": \"%d\",%n", owner.threadId());
+        }
+
+        long threadCount = 0;
+        out.println("        \"threads\": [");
+        Iterator<Thread> threads = container.threads().iterator();
+        while (threads.hasNext()) {
+            Thread thread = threads.next();
+            dumpThreadToJson(thread, out, threads.hasNext());
+            threadCount++;
+        }
+        out.println("        ],");   // end of threads
+
+        // thread count
+        if (!ThreadContainers.trackAllThreads()) {
+            threadCount = Long.max(threadCount, container.threadCount());
+        }
+        out.format("        \"threadCount\": \"%d\"%n", threadCount);
+
+        if (more) {
+            out.println("      },");
+        } else {
+            out.println("      }");  // last container, no trailing comma
+        }
+    }
+
+    /**
+     * Dump the given thread and its stack trace to the print stream in JSON format.
+     */
+    private static void dumpThreadToJson(Thread thread, PrintStream out, boolean more) {
+        out.println("         {");
+        out.println("           \"tid\": \"" + thread.threadId() + "\",");
+        out.println("           \"name\": \"" + escape(thread.getName()) + "\",");
+        out.println("           \"stack\": [");
+
+        int i = 0;
+        StackTraceElement[] stackTrace = thread.getStackTrace();
+        while (i < stackTrace.length) {
+            out.print("              \"");
+            out.print(escape(stackTrace[i].toString()));
+            out.print("\"");
+            i++;
+            if (i < stackTrace.length) {
+                out.println(",");
+            } else {
+                out.println();  // last element, no trailing comma
+            }
+        }
+        out.println("           ]");
+        if (more) {
+            out.println("         },");
+        } else {
+            out.println("         }");  // last thread, no trailing comma
+        }
+    }
+
+    /**
+     * Returns a list of all thread containers that are "reachable" from
+     * the root container.
+     */
+    private static List<ThreadContainer> allContainers() {
+        List<ThreadContainer> containers = new ArrayList<>();
+        collect(ThreadContainers.root(), containers);
+        return containers;
+    }
+
+    private static void collect(ThreadContainer container, List<ThreadContainer> containers) {
+        containers.add(container);
+        container.children().forEach(c -> collect(c, containers));
+    }
+
+    /**
+     * Escape any characters that need to be escape in the JSON output.
+     */
+    private static String escape(String value) {
+        StringBuilder sb = new StringBuilder();
+        for (int i = 0; i < value.length(); i++) {
+            char c = value.charAt(i);
+            switch (c) {
+                case '"'  -> sb.append("\\\"");
+                case '\\' -> sb.append("\\\\");
+                case '/'  -> sb.append("\\/");
+                case '\b' -> sb.append("\\b");
+                case '\f' -> sb.append("\\f");
+                case '\n' -> sb.append("\\n");
+                case '\r' -> sb.append("\\r");
+                case '\t' -> sb.append("\\t");
+                default -> {
+                    if (c <= 0x1f) {
+                        sb.append(String.format("\\u%04x", c));
+                    } else {
+                        sb.append(c);
+                    }
+                }
+            }
+        }
+        return sb.toString();
+    }
+
+    /**
+     * A ByteArrayOutputStream of bounded size. Once the maximum number of bytes is
+     * written the subsequent bytes are discarded.
+     */
+    private static class BoundedByteArrayOutputStream extends ByteArrayOutputStream {
+        final int max;
+        BoundedByteArrayOutputStream(int max) {
+            this.max = max;
+        }
+        @Override
+        public void write(int b) {
+            if (max < count) {
+                super.write(b);
+            }
+        }
+        @Override
+        public void write(byte[] b, int off, int len) {
+            int remaining = max - count;
+            if (remaining > 0) {
+                super.write(b, off, Integer.min(len, remaining));
+            }
+        }
+        @Override
+        public void close() {
+        }
+    }
+
+    /**
+     * Returns the process ID or -1 if not supported.
+     */
+    private static long processId() {
+        try {
+            return ProcessHandle.current().pid();
+        } catch (UnsupportedOperationException e) {
+            return -1L;
+        }
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/vm/TranslatedException.class b/tests/test_data/std/jdk/internal/vm/TranslatedException.class
new file mode 100644
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HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/vm/TranslatedException.java b/tests/test_data/std/jdk/internal/vm/TranslatedException.java
new file mode 100644
index 00000000..662ab25a
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/vm/TranslatedException.java
@@ -0,0 +1,318 @@
+/*
+ * Copyright (c) 2018, 2022, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package jdk.internal.vm;
+
+import jdk.internal.misc.VM;
+
+import java.io.ByteArrayInputStream;
+import java.io.ByteArrayOutputStream;
+import java.io.DataInputStream;
+import java.io.DataOutputStream;
+import java.io.IOException;
+import java.lang.reflect.Constructor;
+import java.lang.reflect.InvocationTargetException;
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.Collections;
+import java.util.List;
+import java.util.zip.GZIPInputStream;
+import java.util.zip.GZIPOutputStream;
+
+/**
+ * Support for translating exceptions between the HotSpot heap and libjvmci heap.
+ */
+@SuppressWarnings("serial")
+final class TranslatedException extends Exception {
+
+    /**
+     * The value returned by {@link #encodeThrowable(Throwable)} when encoding
+     * fails due to an {@link OutOfMemoryError}.
+     */
+    private static final byte[] FALLBACK_ENCODED_OUTOFMEMORYERROR_BYTES;
+
+    /**
+     * The value returned by {@link #encodeThrowable(Throwable)} when encoding
+     * fails for any reason other than {@link OutOfMemoryError}.
+     */
+    private static final byte[] FALLBACK_ENCODED_THROWABLE_BYTES;
+    static {
+        maybeFailClinit();
+        try {
+            FALLBACK_ENCODED_THROWABLE_BYTES =
+                encodeThrowable(new TranslatedException("error during encoding",
+                                                        "<unknown>"), false);
+            FALLBACK_ENCODED_OUTOFMEMORYERROR_BYTES =
+                encodeThrowable(new OutOfMemoryError(), false);
+        } catch (IOException e) {
+            throw new InternalError(e);
+        }
+    }
+
+    /**
+     * Helper to test exception translation.
+     */
+    private static void maybeFailClinit() {
+        String className = VM.getSavedProperty("test.jvmci.TranslatedException.clinit.throw");
+        if (className != null) {
+            try {
+                throw (Throwable) Class.forName(className).getDeclaredConstructor().newInstance();
+            } catch (RuntimeException | Error e) {
+                throw e;
+            } catch (Throwable e) {
+                throw new InternalError(e);
+            }
+        }
+    }
+
+    /**
+     * Class name of exception that could not be instantiated.
+     */
+    private String originalExceptionClassName;
+
+    private TranslatedException(String message, String originalExceptionClassName) {
+        super(message);
+        this.originalExceptionClassName = originalExceptionClassName;
+    }
+
+    /**
+     * No need to record an initial stack trace since
+     * it will be manually overwritten.
+     */
+    @SuppressWarnings("sync-override")
+    @Override
+    public Throwable fillInStackTrace() {
+        return this;
+    }
+
+    @Override
+    public String toString() {
+        String s;
+        if (originalExceptionClassName.equals(TranslatedException.class.getName())) {
+            s = getClass().getName();
+        } else {
+            s = getClass().getName() + "[" + originalExceptionClassName + "]";
+        }
+        String message = getMessage();
+        return (message != null) ? (s + ": " + message) : s;
+    }
+
+    /**
+     * Prints a stack trace for {@code throwable} if the system property
+     * {@code "jdk.internal.vm.TranslatedException.debug"} is true.
+     */
+    private static void debugPrintStackTrace(Throwable throwable, boolean debug) {
+        if (debug) {
+            System.err.print("DEBUG: ");
+            throwable.printStackTrace();
+        }
+    }
+
+    private static Throwable initCause(Throwable throwable, Throwable cause, boolean debug) {
+        if (cause != null) {
+            try {
+                throwable.initCause(cause);
+            } catch (IllegalStateException e) {
+                // Cause could not be set or overwritten.
+                debugPrintStackTrace(e, debug);
+            }
+        }
+        return throwable;
+    }
+
+    private static Throwable create(String className, String message, Throwable cause, boolean debug) {
+        // Try create with reflection first.
+        try {
+            Class<?> cls = Class.forName(className);
+            if (cause != null) {
+                // Handle known exception types whose cause must
+                // be set in the constructor
+                if (cls == InvocationTargetException.class) {
+                    return new InvocationTargetException(cause, message);
+                }
+                if (cls == ExceptionInInitializerError.class) {
+                    return new ExceptionInInitializerError(cause);
+                }
+            }
+            if (message == null) {
+                Constructor<?> cons = cls.getConstructor();
+                return initCause((Throwable) cons.newInstance(), cause, debug);
+            }
+            Constructor<?> cons = cls.getDeclaredConstructor(String.class);
+            return initCause((Throwable) cons.newInstance(message), cause, debug);
+        } catch (Throwable translationFailure) {
+            debugPrintStackTrace(translationFailure, debug);
+            return initCause(new TranslatedException(message, className), cause, debug);
+        }
+    }
+
+    private static String emptyIfNull(String value) {
+        return value == null ? "" : value;
+    }
+
+    private static String emptyAsNull(String value) {
+        return value.isEmpty() ? null : value;
+    }
+
+    /**
+     * Encodes {@code throwable} including its stack and causes as a {@linkplain GZIPOutputStream
+     * compressed} byte array that can be decoded by {@link #decodeThrowable}.
+     */
+    static byte[] encodeThrowable(Throwable throwable) {
+        try {
+            return encodeThrowable(throwable, true);
+        } catch (OutOfMemoryError e) {
+            return FALLBACK_ENCODED_OUTOFMEMORYERROR_BYTES;
+        } catch (Throwable e) {
+            return FALLBACK_ENCODED_THROWABLE_BYTES;
+        }
+    }
+
+    private static byte[] encodeThrowable(Throwable throwable,
+                                          boolean withCauseAndStack) throws IOException {
+        ByteArrayOutputStream baos = new ByteArrayOutputStream();
+        try (DataOutputStream dos = new DataOutputStream(new GZIPOutputStream(baos))) {
+            List<Throwable> throwables = new ArrayList<>();
+            for (Throwable current = throwable; current != null; current = current.getCause()) {
+                throwables.add(current);
+                if (!withCauseAndStack) {
+                    break;
+                }
+            }
+
+            // Encode from inner most cause outwards
+            Collections.reverse(throwables);
+
+            for (Throwable current : throwables) {
+                dos.writeUTF(current.getClass().getName());
+                dos.writeUTF(emptyIfNull(current.getMessage()));
+                StackTraceElement[] stackTrace = withCauseAndStack ? current.getStackTrace() : null;
+                if (stackTrace == null) {
+                    stackTrace = new StackTraceElement[0];
+                }
+                dos.writeInt(stackTrace.length);
+                for (int i = 0; i < stackTrace.length; i++) {
+                    StackTraceElement frame = stackTrace[i];
+                    if (frame != null) {
+                        dos.writeUTF(emptyIfNull(frame.getClassLoaderName()));
+                        dos.writeUTF(emptyIfNull(frame.getModuleName()));
+                        dos.writeUTF(emptyIfNull(frame.getModuleVersion()));
+                        dos.writeUTF(emptyIfNull(frame.getClassName()));
+                        dos.writeUTF(emptyIfNull(frame.getMethodName()));
+                        dos.writeUTF(emptyIfNull(frame.getFileName()));
+                        dos.writeInt(frame.getLineNumber());
+                    }
+                }
+            }
+        }
+        return baos.toByteArray();
+    }
+
+    /**
+     * Gets the stack of the current thread as of the first native method. The chopped
+     * frames are for the VM call to {@link VMSupport#decodeAndThrowThrowable}.
+     */
+    private static StackTraceElement[] getMyStackTrace() {
+        Exception ex = new Exception();
+        StackTraceElement[] stack = ex.getStackTrace();
+        for (int i = 0; i < stack.length; i++) {
+            StackTraceElement e = stack[i];
+            if (e.isNativeMethod()) {
+                return Arrays.copyOfRange(stack, i, stack.length);
+            }
+        }
+        // This should never happen but since this is exception handling
+        // code, be defensive instead raising a nested exception.
+        return new StackTraceElement[0];
+    }
+
+    /**
+     * Decodes {@code encodedThrowable} into a {@link TranslatedException}.
+     *
+     * @param encodedThrowable an encoded exception in the format specified by
+     *            {@link #encodeThrowable}
+     */
+    static Throwable decodeThrowable(byte[] encodedThrowable, boolean debug) {
+        ByteArrayInputStream bais = new ByteArrayInputStream(encodedThrowable);
+        try (DataInputStream dis = new DataInputStream(new GZIPInputStream(bais))) {
+            Throwable cause = null;
+            Throwable throwable = null;
+            StackTraceElement[] myStack = getMyStackTrace();
+            while (dis.available() != 0) {
+                String exceptionClassName = dis.readUTF();
+                String exceptionMessage = emptyAsNull(dis.readUTF());
+                throwable = create(exceptionClassName, exceptionMessage, cause, debug);
+                int stackTraceDepth = dis.readInt();
+                StackTraceElement[] stackTrace = new StackTraceElement[stackTraceDepth + myStack.length];
+                int stackTraceIndex = 0;
+                int myStackIndex = 0;
+                for (int j = 0; j < stackTraceDepth; j++) {
+                    String classLoaderName = emptyAsNull(dis.readUTF());
+                    String moduleName = emptyAsNull(dis.readUTF());
+                    String moduleVersion = emptyAsNull(dis.readUTF());
+                    String className = emptyAsNull(dis.readUTF());
+                    String methodName = emptyAsNull(dis.readUTF());
+                    String fileName = emptyAsNull(dis.readUTF());
+                    int lineNumber = dis.readInt();
+                    StackTraceElement ste = new StackTraceElement(classLoaderName,
+                                                                  moduleName,
+                                                                  moduleVersion,
+                                                                  className,
+                                                                  methodName,
+                                                                  fileName,
+                                                                  lineNumber);
+
+                    if (ste.isNativeMethod()) {
+                        // Best effort attempt to weave stack traces from two heaps into
+                        // a single stack trace using native method frames as stitching points.
+                        // This is not 100% reliable as there's no guarantee that native method
+                        // frames only exist for calls between HotSpot and libjvmci.
+                        while (myStackIndex < myStack.length) {
+                            StackTraceElement suffixSTE = myStack[myStackIndex++];
+                            if (suffixSTE.isNativeMethod()) {
+                                break;
+                            }
+                            stackTrace[stackTraceIndex++] = suffixSTE;
+                        }
+                    }
+                    stackTrace[stackTraceIndex++] = ste;
+                }
+                while (myStackIndex < myStack.length) {
+                    stackTrace[stackTraceIndex++] = myStack[myStackIndex++];
+                }
+                if (stackTraceIndex != stackTrace.length) {
+                    // Remove null entries at end of stackTrace
+                    stackTrace = Arrays.copyOf(stackTrace, stackTraceIndex);
+                }
+                throwable.setStackTrace(stackTrace);
+                cause = throwable;
+            }
+            return throwable;
+        } catch (Throwable translationFailure) {
+            debugPrintStackTrace(translationFailure, debug);
+            return new TranslatedException("Error decoding exception: " + encodedThrowable,
+                                           translationFailure.getClass().getName());
+        }
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/vm/VMSupport$AnnotationDecoder.class b/tests/test_data/std/jdk/internal/vm/VMSupport$AnnotationDecoder.class
new file mode 100644
index 0000000000000000000000000000000000000000..9f47ed19ef6152c758576c3857556ee3e62f34b2
GIT binary patch
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diff --git a/tests/test_data/std/jdk/internal/vm/VMSupport$IOReader.class b/tests/test_data/std/jdk/internal/vm/VMSupport$IOReader.class
new file mode 100644
index 0000000000000000000000000000000000000000..223b35677b76fc96d7abb920751ea9fcb44c8885
GIT binary patch
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diff --git a/tests/test_data/std/jdk/internal/vm/VMSupport.class b/tests/test_data/std/jdk/internal/vm/VMSupport.class
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zz~thxRd*Ow7mSFf<Z_KIK>J_-H03vt6#KT$2yGCc<elo+&2%y2s*S9XeU(Fg8%;C;
zjVD50Uq)G}->To?+mF&1{FYDL5|Se7?~sDut3TkeORr^0uV+ecWJ-U^l>VG4y_qTf
zB~yAUQ+hj7dM8tQKU4ZEN}qv}p)emW;}?sc`-A)hrui>_5ZV<`|Mmye7iuTOEBrr2
Cq~SXN

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HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/vm/VMSupport.java b/tests/test_data/std/jdk/internal/vm/VMSupport.java
new file mode 100644
index 00000000..a8c3b5d4
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/vm/VMSupport.java
@@ -0,0 +1,581 @@
+/*
+ * Copyright (c) 2005, 2023, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package jdk.internal.vm;
+
+import jdk.internal.misc.Unsafe;
+import jdk.internal.misc.VM;
+import jdk.internal.access.SharedSecrets;
+import jdk.internal.access.JavaLangAccess;
+import jdk.internal.reflect.ConstantPool;
+import sun.reflect.annotation.AnnotationParser;
+import sun.reflect.annotation.AnnotationSupport;
+import sun.reflect.annotation.AnnotationType;
+
+import java.io.ByteArrayInputStream;
+import java.io.ByteArrayOutputStream;
+import java.io.DataInputStream;
+import java.io.DataOutputStream;
+import java.io.IOException;
+import java.lang.annotation.Annotation;
+import java.lang.annotation.IncompleteAnnotationException;
+import java.nio.charset.StandardCharsets;
+import java.util.Collection;
+import java.util.LinkedHashMap;
+import java.util.Map;
+import java.util.Properties;
+import java.util.Set;
+import java.util.List;
+
+/*
+ * Support class used by JVMCI, JVMTI and VM attach mechanism.
+ */
+public class VMSupport {
+
+    private static final Unsafe U = Unsafe.getUnsafe();
+    private static Properties agentProps = null;
+
+    /**
+     * Returns the agent properties.
+     */
+    public static synchronized Properties getAgentProperties() {
+        if (agentProps == null) {
+            agentProps = new Properties();
+            initAgentProperties(agentProps);
+        }
+        return agentProps;
+    }
+    private static native Properties initAgentProperties(Properties props);
+
+    /**
+     * Writes the given properties list to a byte array and return it. The stream written
+     * to the byte array is ISO 8859-1 encoded.
+     */
+    private static byte[] serializePropertiesToByteArray(Properties p) throws IOException {
+        ByteArrayOutputStream out = new ByteArrayOutputStream(4096);
+        p.store(out, null);
+        return out.toByteArray();
+    }
+
+    /**
+     * @return a Properties object containing only the entries in {@code p}
+     *          whose key and value are both Strings
+     */
+    private static Properties onlyStrings(Properties p) {
+        Properties props = new Properties();
+
+        // stringPropertyNames() returns a snapshot of the property keys
+        Set<String> keyset = p.stringPropertyNames();
+        for (String key : keyset) {
+            String value = p.getProperty(key);
+            props.put(key, value);
+        }
+        return props;
+    }
+
+    public static byte[] serializePropertiesToByteArray() throws IOException {
+        return serializePropertiesToByteArray(onlyStrings(System.getProperties()));
+    }
+
+    public static byte[] serializeAgentPropertiesToByteArray() throws IOException {
+        return serializePropertiesToByteArray(onlyStrings(getAgentProperties()));
+    }
+
+    /*
+     * Return the temporary directory that the VM uses for the attach
+     * and perf data files.
+     *
+     * It is important that this directory is well-known and the
+     * same for all VM instances. It cannot be affected by configuration
+     * variables such as java.io.tmpdir.
+     */
+    public static native String getVMTemporaryDirectory();
+
+    /**
+     * Decodes the exception described by {@code format} and {@code buffer} and throws it.
+     *
+     * @param format specifies how to interpret {@code buffer}:
+     *            <pre>
+     *             0: {@code buffer} was created by {@link #encodeThrowable}
+     *             1: native memory for {@code buffer} could not be allocated
+     *             2: an OutOfMemoryError was thrown while encoding the exception
+     *             3: some other problem occured while encoding the exception. If {@code buffer != 0},
+     *                it contains a {@code struct { u4 len; char[len] desc}} where {@code desc} describes the problem
+     *            </pre>
+     * @param buffer encoded info about the exception to throw (depends on {@code format})
+     * @param inJVMHeap [@code true} if executing in the JVM heap, {@code false} otherwise
+     * @param debug specifies whether debug stack traces should be enabled in case of translation failure
+     */
+    public static void decodeAndThrowThrowable(int format, long buffer, boolean inJVMHeap, boolean debug) throws Throwable {
+        if (format != 0) {
+            String context = String.format("while encoding an exception to translate it %s the JVM heap",
+                    inJVMHeap ? "to" : "from");
+            if (format == 1) {
+                throw new InternalError("native buffer could not be allocated " + context);
+            }
+            if (format == 2) {
+                throw new OutOfMemoryError("OutOfMemoryError occurred " + context);
+            }
+            if (format == 3 && buffer != 0L) {
+                byte[] bytes = bufferToBytes(buffer);
+                throw new InternalError("unexpected problem occurred " + context + ": " + new String(bytes, StandardCharsets.UTF_8));
+            }
+            throw new InternalError("unexpected problem occurred " + context);
+        }
+        throw TranslatedException.decodeThrowable(bufferToBytes(buffer), debug);
+    }
+
+    private static byte[] bufferToBytes(long buffer) {
+        if (buffer == 0) {
+            return null;
+        }
+        int len = U.getInt(buffer);
+        byte[] bytes = new byte[len];
+        U.copyMemory(null, buffer + 4, bytes, Unsafe.ARRAY_BYTE_BASE_OFFSET, len);
+        return bytes;
+    }
+
+    /**
+     * If {@code bufferSize} is large enough, encodes {@code throwable} into a byte array and writes
+     * it to {@code buffer}. The encoding in {@code buffer} can be decoded by
+     * {@link #decodeAndThrowThrowable}.
+     *
+     * @param throwable the exception to encode
+     * @param buffer a native byte buffer
+     * @param bufferSize the size of {@code buffer} in bytes
+     * @return the number of bytes written into {@code buffer} if {@code bufferSize} is large
+     *         enough, otherwise {@code -N} where {@code N} is the value {@code bufferSize} needs to
+     *         be to fit the encoding
+     */
+    public static int encodeThrowable(Throwable throwable, long buffer, int bufferSize) {
+        byte[] encoding = TranslatedException.encodeThrowable(throwable);
+        int requiredSize = 4 + encoding.length;
+        if (bufferSize < requiredSize) {
+            return -requiredSize;
+        }
+        U.putInt(buffer, encoding.length);
+        U.copyMemory(encoding, Unsafe.ARRAY_BYTE_BASE_OFFSET, null, buffer + 4, encoding.length);
+        return requiredSize;
+    }
+
+    /**
+     * Parses {@code rawAnnotations} into a list of {@link Annotation}s and then
+     * serializes them to a byte array with {@link #encodeAnnotations(Collection)}.
+     */
+    public static byte[] encodeAnnotations(byte[] rawAnnotations,
+                                           Class<?> declaringClass,
+                                           ConstantPool cp,
+                                           boolean forClass,
+                                           Class<? extends Annotation>[] selectAnnotationClasses)
+    {
+        for (Class<?> c : selectAnnotationClasses) {
+            if (!c.isAnnotation()) {
+                throw new IllegalArgumentException(c + " is not an annotation interface");
+            }
+        }
+        Map<Class<? extends Annotation>, Annotation> annotations =
+                AnnotationParser.parseSelectAnnotations(rawAnnotations, cp, declaringClass, selectAnnotationClasses);
+        if (forClass && annotations.size() != selectAnnotationClasses.length) {
+            Class<?> superClass = declaringClass.getSuperclass();
+            nextSuperClass:
+            while (superClass != null) {
+                JavaLangAccess jla = SharedSecrets.getJavaLangAccess();
+                Map<Class<? extends Annotation>, Annotation> superAnnotations =
+                    AnnotationParser.parseSelectAnnotations(
+                            jla.getRawClassAnnotations(superClass),
+                            jla.getConstantPool(superClass),
+                            superClass,
+                            selectAnnotationClasses);
+
+                for (Map.Entry<Class<? extends Annotation>, Annotation> e : superAnnotations.entrySet()) {
+                    Class<? extends Annotation> annotationClass = e.getKey();
+                    if (!annotations.containsKey(annotationClass) && AnnotationType.getInstance(annotationClass).isInherited()) {
+                        if (annotations.isEmpty()) {
+                            // An empty map might be unmodifiable (e.g. Collections.emptyMap()).
+                            annotations = new LinkedHashMap<Class<? extends Annotation>, Annotation>();
+                        }
+                        annotations.put(annotationClass, e.getValue());
+                        if (annotations.size() == selectAnnotationClasses.length) {
+                            break nextSuperClass;
+                        }
+                    }
+                }
+                superClass = superClass.getSuperclass();
+            }
+        }
+        return encodeAnnotations(annotations.values());
+    }
+
+    /**
+     * Encodes annotations to a byte array. The byte array can be decoded with {@link #decodeAnnotations(byte[], AnnotationDecoder)}.
+     */
+    public static byte[] encodeAnnotations(Collection<Annotation> annotations) {
+        try {
+            ByteArrayOutputStream baos = new ByteArrayOutputStream(128);
+            try (DataOutputStream dos = new DataOutputStream(baos)) {
+                writeLength(dos, annotations.size());
+                for (Annotation a : annotations) {
+                    encodeAnnotation(dos, a);
+                }
+            }
+            return baos.toByteArray();
+        } catch (Exception e) {
+            throw new InternalError(e);
+        }
+    }
+
+    private static void encodeAnnotation(DataOutputStream dos, Annotation a) throws Exception {
+        Class<? extends Annotation> type = a.annotationType();
+        Map<String, Object> values = AnnotationSupport.memberValues(a);
+        dos.writeUTF(type.getName());
+        writeLength(dos, values.size());
+        for (Map.Entry<String, Object> e : values.entrySet()) {
+            Object value = e.getValue();
+            if (value == null) {
+                // IncompleteAnnotationException
+                dos.writeByte('x');
+                dos.writeUTF(new IncompleteAnnotationException(type, e.getKey()).toString());
+                continue;
+            }
+            Class<?> valueType = value.getClass();
+            dos.writeUTF(e.getKey());
+            if (valueType == Byte.class) {
+                dos.writeByte('B');
+                dos.writeByte((byte) value);
+            } else if (valueType == Character.class) {
+                dos.writeByte('C');
+                dos.writeChar((char) value);
+            } else if (valueType == Double.class) {
+                dos.writeByte('D');
+                dos.writeDouble((double) value);
+            } else if (valueType == Float.class) {
+                dos.writeByte('F');
+                dos.writeFloat((float) value);
+            } else if (valueType == Integer.class) {
+                dos.writeByte('I');
+                dos.writeInt((int) value);
+            } else if (valueType == Long.class) {
+                dos.writeByte('J');
+                dos.writeLong((long) value);
+            } else if (valueType == Short.class) {
+                dos.writeByte('S');
+                dos.writeShort((short) value);
+            } else if (valueType == Boolean.class) {
+                dos.writeByte('Z');
+                dos.writeBoolean((boolean) value);
+            } else if (valueType == String.class) {
+                dos.writeByte('s');
+                dos.writeUTF((String) value);
+            } else if (valueType == Class.class) {
+                dos.writeByte('c');
+                dos.writeUTF(((Class<?>) value).getName());
+            } else if (valueType.isEnum()) {
+                dos.writeByte('e');
+                dos.writeUTF(valueType.getName());
+                dos.writeUTF(((Enum<?>) value).name());
+            } else if (value instanceof Annotation) {
+                dos.writeByte('@');
+                encodeAnnotation(dos, (Annotation) value);
+            } else if (valueType.isArray()) {
+                Class<?> componentType = valueType.getComponentType();
+                if (componentType == byte.class) {
+                    byte[] array = (byte[]) value;
+                    dos.writeByte('[');
+                    dos.writeByte('B');
+                    writeLength(dos, array.length);
+                    dos.write(array);
+                } else if (componentType == char.class) {
+                    char[] array = (char[]) value;
+                    dos.writeByte('[');
+                    dos.writeByte('C');
+                    writeLength(dos, array.length);
+                    for (char c : array) {
+                        dos.writeChar(c);
+                    }
+                } else if (componentType == double.class) {
+                    double[] array = (double[]) value;
+                    dos.writeByte('[');
+                    dos.writeByte('D');
+                    writeLength(dos, array.length);
+                    for (double v : array) {
+                        dos.writeDouble(v);
+                    }
+                } else if (componentType == float.class) {
+                    float[] array = (float[]) value;
+                    dos.writeByte('[');
+                    dos.writeByte('F');
+                    writeLength(dos, array.length);
+                    for (float v : array) {
+                        dos.writeFloat(v);
+                    }
+                } else if (componentType == int.class) {
+                    int[] array = (int[]) value;
+                    dos.writeByte('[');
+                    dos.writeByte('I');
+                    writeLength(dos, array.length);
+                    for (int j : array) {
+                        dos.writeInt(j);
+                    }
+                } else if (componentType == long.class) {
+                    long[] array = (long[]) value;
+                    dos.writeByte('[');
+                    dos.writeByte('J');
+                    writeLength(dos, array.length);
+                    for (long l : array) {
+                        dos.writeLong(l);
+                    }
+                } else if (componentType == short.class) {
+                    short[] array = (short[]) value;
+                    dos.writeByte('[');
+                    dos.writeByte('S');
+                    writeLength(dos, array.length);
+                    for (short item : array) {
+                        dos.writeShort(item);
+                    }
+                } else if (componentType == boolean.class) {
+                    boolean[] array = (boolean[]) value;
+                    dos.writeByte('[');
+                    dos.writeByte('Z');
+                    writeLength(dos, array.length);
+                    for (boolean b : array) {
+                        dos.writeBoolean(b);
+                    }
+                } else if (componentType == String.class) {
+                    String[] array = (String[]) value;
+                    dos.writeByte('[');
+                    dos.writeByte('s');
+                    writeLength(dos, array.length);
+                    for (String s : array) {
+                        dos.writeUTF(s);
+                    }
+                } else if (componentType == Class.class) {
+                    Class<?>[] array = (Class<?>[]) value;
+                    dos.writeByte('[');
+                    dos.writeByte('c');
+                    writeLength(dos, array.length);
+                    for (Class<?> aClass : array) {
+                        dos.writeUTF(aClass.getName());
+                    }
+                } else if (componentType.isEnum()) {
+                    Enum<?>[] array = (Enum<?>[]) value;
+                    dos.writeByte('[');
+                    dos.writeByte('e');
+                    dos.writeUTF(componentType.getName());
+                    writeLength(dos, array.length);
+                    for (Enum<?> anEnum : array) {
+                        dos.writeUTF(anEnum.name());
+                    }
+                } else if (componentType.isAnnotation()) {
+                    Annotation[] array = (Annotation[]) value;
+                    dos.writeByte('[');
+                    dos.writeByte('@');
+                    writeLength(dos, array.length);
+                    for (Annotation annotation : array) {
+                        encodeAnnotation(dos, annotation);
+                    }
+                } else {
+                    dos.writeByte('x');
+                    dos.writeUTF(value.toString());
+                }
+
+            } else {
+                dos.writeByte('x');
+                dos.writeUTF(value.toString());
+            }
+        }
+    }
+
+    /**
+     * Helper for {@link #decodeAnnotations(byte[], AnnotationDecoder)} to convert a byte
+     * array (ostensibly produced by {@link VMSupport#encodeAnnotations}) into objects.
+     *
+     * @param <T> type to which a type name is {@linkplain #resolveType(String) resolved}
+     * @param <A> type of the object representing a decoded annotation
+     * @param <E> type of the object representing a decoded enum constant
+     * @param <X> type of the object representing a decoded error
+     */
+    public interface AnnotationDecoder<T, A, E, X> {
+        /**
+         * Resolves a name in {@link Class#getName()} format to an object of type {@code T}.
+         */
+        T resolveType(String name);
+
+        /**
+         * Creates an object representing a decoded annotation.
+         *
+         * @param type the annotation interface of the annotation
+         * @param elements elements of the annotation
+         */
+        A newAnnotation(T type, Map.Entry<String, Object>[] elements);
+
+        /**
+         * Creates an object representing a decoded enum constant.
+         *
+         * @param enumType the enum type
+         * @param name the name of the enum constant
+         */
+        E newEnumValue(T enumType, String name);
+
+        /**
+         * Creates an object representing a decoded error value.
+         *
+         * @param description of the error
+         */
+        X newErrorValue(String description);
+    }
+
+    /**
+     * Decodes annotations serialized in {@code encoded} to objects.
+     *
+     * @param <T> type to which a type name is resolved
+     * @param <A> type of the object representing a decoded annotation
+     * @param <E> type of the object representing a decoded enum constant
+     * @param <X> type of the object representing a decoded error
+     * @return an immutable list of {@code A} objects
+     */
+    @SuppressWarnings({"rawtypes", "unchecked"})
+    public static <T, A, E, X> List<A> decodeAnnotations(byte[] encoded, AnnotationDecoder<T, A, E, X> decoder) {
+        try {
+            ByteArrayInputStream bais = new ByteArrayInputStream(encoded);
+            DataInputStream dis = new DataInputStream(bais);
+            return (List<A>) readArray(dis, () -> decodeAnnotation(dis, decoder));
+        } catch (Exception e) {
+            throw new InternalError(e);
+        }
+    }
+
+    @SuppressWarnings({"rawtypes", "unchecked"})
+    private static <T, A, E, X> A decodeAnnotation(DataInputStream dis, AnnotationDecoder<T, A, E, X> decoder) throws IOException {
+        String typeName = dis.readUTF();
+        T type = decoder.resolveType(typeName);
+        int n = readLength(dis);
+        Map.Entry[] elements = new Map.Entry[n];
+        for (int i = 0; i < n; i++) {
+            String name = dis.readUTF();
+            byte tag = dis.readByte();
+            elements[i] = Map.entry(name, switch (tag) {
+                case 'B' -> dis.readByte();
+                case 'C' -> dis.readChar();
+                case 'D' -> dis.readDouble();
+                case 'F' -> dis.readFloat();
+                case 'I' -> dis.readInt();
+                case 'J' -> dis.readLong();
+                case 'S' -> dis.readShort();
+                case 'Z' -> dis.readBoolean();
+                case 's' -> dis.readUTF();
+                case 'c' -> decoder.resolveType(dis.readUTF());
+                case 'e' -> decoder.newEnumValue(decoder.resolveType(dis.readUTF()), dis.readUTF());
+                case '@' -> decodeAnnotation(dis, decoder);
+                case '[' -> decodeArray(dis, decoder);
+                case 'x' -> decoder.newErrorValue(dis.readUTF());
+                default -> throw new InternalError("Unsupported tag: " + tag);
+            });
+        }
+        return decoder.newAnnotation(type, (Map.Entry<String, Object>[]) elements);
+    }
+    @FunctionalInterface
+    interface IOReader {
+        Object read() throws IOException;
+    }
+
+    private static <T, A, E, X> Object decodeArray(DataInputStream dis, AnnotationDecoder<T, A, E, X> decoder) throws IOException {
+        byte componentTag = dis.readByte();
+        return switch (componentTag) {
+            case 'B' -> readArray(dis, dis::readByte);
+            case 'C' -> readArray(dis, dis::readChar);
+            case 'D' -> readArray(dis, dis::readDouble);
+            case 'F' -> readArray(dis, dis::readFloat);
+            case 'I' -> readArray(dis, dis::readInt);
+            case 'J' -> readArray(dis, dis::readLong);
+            case 'S' -> readArray(dis, dis::readShort);
+            case 'Z' -> readArray(dis, dis::readBoolean);
+            case 's' -> readArray(dis, dis::readUTF);
+            case 'c' -> readArray(dis, () -> readClass(dis, decoder));
+            case 'e' -> {
+                T enumType = decoder.resolveType(dis.readUTF());
+                yield readArray(dis, () -> readEnum(dis, decoder, enumType));
+            }
+            case '@' -> readArray(dis, () -> decodeAnnotation(dis, decoder));
+            default -> throw new InternalError("Unsupported component tag: " + componentTag);
+        };
+    }
+
+    /**
+     * Reads an enum encoded at the current read position of {@code dis} and
+     * returns it as an object of type {@code E}.
+     */
+    private static <T, A, E, X> E readEnum(DataInputStream dis, AnnotationDecoder<T, A, E, X> decoder, T enumType) throws IOException {
+        return decoder.newEnumValue(enumType, dis.readUTF());
+    }
+
+    /**
+     * Reads a class encoded at the current read position of {@code dis} and
+     * returns it as an object of type {@code T}.
+     */
+    private static <T, A, E, X> T readClass(DataInputStream dis, AnnotationDecoder<T, A, E, X> decoder) throws IOException {
+        return decoder.resolveType(dis.readUTF());
+    }
+
+    /**
+     * Reads an array encoded at the current read position of {@code dis} and
+     * returns it in an immutable list.
+     *
+     * @param reader reads array elements from {@code dis}
+     * @return an immutable list of {@code A} objects
+     */
+    private static List<Object> readArray(DataInputStream dis, IOReader reader) throws IOException {
+        Object[] array = new Object[readLength(dis)];
+        for (int i = 0; i < array.length; i++) {
+            array[i] = reader.read();
+        }
+        return List.of(array);
+    }
+
+    /**
+     * Encodes {@code length} in 1 byte if it is less than 128.
+     */
+    private static void writeLength(DataOutputStream dos, int length) throws IOException {
+        if (length < 0) {
+            throw new NegativeArraySizeException();
+        } else if (length <= 127) {
+            dos.writeByte((byte) (0x80 | length));
+        } else {
+            dos.writeInt(length);
+        }
+    }
+
+    private static int readLength(DataInputStream dis) throws IOException {
+        int ch1 = dis.readByte();
+        int length;
+        if (ch1 < 0) {
+            length = ch1 & 0x7F;
+        } else {
+            int ch2 = dis.read();
+            int ch3 = dis.read();
+            int ch4 = dis.read();
+            length = (ch1 << 24) + (ch2 << 16) + (ch3 << 8) + (ch4 << 0);
+        }
+        return length;
+    }
+}
diff --git a/tests/test_data/std/jdk/internal/vm/annotation/ChangesCurrentThread.class b/tests/test_data/std/jdk/internal/vm/annotation/ChangesCurrentThread.class
new file mode 100644
index 0000000000000000000000000000000000000000..e207e008adbd77b2743a4e9e077bb060fc586046
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/vm/annotation/ChangesCurrentThread.java b/tests/test_data/std/jdk/internal/vm/annotation/ChangesCurrentThread.java
new file mode 100644
index 00000000..b7cf92f1
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/vm/annotation/ChangesCurrentThread.java
@@ -0,0 +1,44 @@
+/*
+ * Copyright (c) 2020, 2022, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package jdk.internal.vm.annotation;
+
+import java.lang.annotation.*;
+
+/**
+ * A method or constructor must be annotated as "changes current
+ * thread" if it calls Thread.setCurrentThread. This annotation also
+ * disables inlining for the method to which it is applied unless the
+ * method being inlined into is also annotated ChangesCurrentThread.
+
+ * @implNote
+ * This annotation only takes effect for methods or constructors of classes
+ * loaded by the boot loader.  Annotations on methods or constructors of classes
+ * loaded outside of the boot loader are ignored.
+ */
+@Target({ElementType.METHOD, ElementType.CONSTRUCTOR})
+@Retention(RetentionPolicy.RUNTIME)
+public @interface ChangesCurrentThread {
+}
diff --git a/tests/test_data/std/jdk/internal/vm/annotation/Contended.class b/tests/test_data/std/jdk/internal/vm/annotation/Contended.class
new file mode 100644
index 0000000000000000000000000000000000000000..89d345d99557f57f36682213a08ec64334efa2ee
GIT binary patch
literal 472
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zg>oSAu(R{=-n^OJpWm-<04<#Q@CaA4$w#2A<HRZxEa!o;Hg?MC*aodw@^-=#A4NiS
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zG#PV88=+R#liX$<2xo)TIz8tXz0f1Wd5Z<1v7xdt(tu@`Y%S4j{sZa9Mvqql^asz6
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/vm/annotation/Contended.java b/tests/test_data/std/jdk/internal/vm/annotation/Contended.java
new file mode 100644
index 00000000..f32a3ddf
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/vm/annotation/Contended.java
@@ -0,0 +1,83 @@
+/*
+ * Copyright (c) 2013, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package jdk.internal.vm.annotation;
+
+import java.lang.annotation.ElementType;
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+import java.lang.annotation.Target;
+
+/**
+ * <p>An annotation expressing that objects and/or their fields are
+ * expected to encounter memory contention, generally in the form of
+ * "false sharing". This annotation serves as a hint that such objects
+ * and fields should reside in locations isolated from those of other
+ * objects or fields. Susceptibility to memory contention is a
+ * property of the intended usages of objects and fields, not their
+ * types or qualifiers. The effects of this annotation will nearly
+ * always add significant space overhead to objects. The use of
+ * {@code @Contended} is warranted only when the performance impact of
+ * this time/space tradeoff is intrinsically worthwhile; for example,
+ * in concurrent contexts in which each instance of the annotated
+ * class is often accessed by a different thread.
+ *
+ * <p>A {@code @Contended} field annotation may optionally include a
+ * <i>contention group</i> tag. A contention group defines a set of one
+ * or more fields that collectively must be isolated from all other
+ * contention groups. The fields in the same contention group may not be
+ * pairwise isolated. With no contention group tag (or with the default
+ * empty tag: "") each {@code @Contended} field resides in its own
+ * <i>distinct</i> and <i>anonymous</i> contention group.
+ *
+ * <p>When the annotation is used at the class level, the effect is
+ * equivalent to grouping all the declared fields not already having the
+ * {@code @Contended} annotation into the same anonymous group.
+ * With the class level annotation, implementations may choose different
+ * isolation techniques, such as isolating the entire object, rather than
+ * isolating distinct fields. A contention group tag has no meaning
+ * in a class level {@code @Contended} annotation, and is ignored.
+ *
+ * <p>The class level {@code @Contended} annotation is not inherited and has
+ * no effect on the fields declared in any sub-classes. The effects of all
+ * {@code @Contended} annotations, however, remain in force for all
+ * subclass instances, providing isolation of all the defined contention
+ * groups. Contention group tags are not inherited, and the same tag used
+ * in a superclass and subclass, represent distinct contention groups.
+ *
+ * @since 1.8
+ */
+@Retention(RetentionPolicy.RUNTIME)
+@Target({ElementType.FIELD, ElementType.TYPE})
+public @interface Contended {
+
+    /**
+     * The (optional) contention group tag.
+     * This tag is only meaningful for field level annotations.
+     *
+     * @return contention group tag.
+     */
+    String value() default "";
+}
diff --git a/tests/test_data/std/jdk/internal/vm/annotation/DontInline.class b/tests/test_data/std/jdk/internal/vm/annotation/DontInline.class
new file mode 100644
index 0000000000000000000000000000000000000000..a06427849b53c7d9f9b60ac048a400e29cb79980
GIT binary patch
literal 419
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/vm/annotation/DontInline.java b/tests/test_data/std/jdk/internal/vm/annotation/DontInline.java
new file mode 100644
index 00000000..d39dccff
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/vm/annotation/DontInline.java
@@ -0,0 +1,50 @@
+/*
+ * Copyright (c) 2012, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package jdk.internal.vm.annotation;
+
+import java.lang.annotation.*;
+
+/**
+ * A method or constructor may be annotated as "don't inline" if the inlining of
+ * this method should not be performed by the HotSpot VM.
+ * <p>
+ * This annotation must be used sparingly.  It is useful when the only
+ * reasonable alternative is to bind the name of a specific method or
+ * constructor into the HotSpot VM for special handling by the inlining policy.
+ * This annotation must not be relied on as an alternative to avoid tuning the
+ * VM's inlining policy.  In a few cases, it may act as a temporary workaround
+ * until the profiling and inlining performed by the HotSpot VM is sufficiently
+ * improved.
+ *
+ * @implNote
+ * This annotation only takes effect for methods or constructors of classes
+ * loaded by the boot loader.  Annotations on methods or constructors of classes
+ * loaded outside of the boot loader are ignored.
+ */
+@Target({ElementType.METHOD, ElementType.CONSTRUCTOR})
+@Retention(RetentionPolicy.RUNTIME)
+public @interface DontInline {
+}
diff --git a/tests/test_data/std/jdk/internal/vm/annotation/ForceInline.class b/tests/test_data/std/jdk/internal/vm/annotation/ForceInline.class
new file mode 100644
index 0000000000000000000000000000000000000000..5443c862a7e529f86ee2bb8e6c85b98030520ee2
GIT binary patch
literal 421
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/vm/annotation/ForceInline.java b/tests/test_data/std/jdk/internal/vm/annotation/ForceInline.java
new file mode 100644
index 00000000..e8253db0
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/vm/annotation/ForceInline.java
@@ -0,0 +1,51 @@
+/*
+ * Copyright (c) 2012, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package jdk.internal.vm.annotation;
+
+import java.lang.annotation.*;
+
+/**
+ * A method or constructor may be annotated as "force inline" if the standard
+ * inlining metrics are to be ignored when the HotSpot VM inlines the method
+ * or constructor.
+ * <p>
+ * This annotation must be used sparingly.  It is useful when the only
+ * reasonable alternative is to bind the name of a specific method or
+ * constructor into the HotSpot VM for special handling by the inlining policy.
+ * This annotation must not be relied on as an alternative to avoid tuning the
+ * VM's inlining policy.  In a few cases, it may act as a temporary workaround
+ * until the profiling and inlining performed by the HotSpot VM is sufficiently
+ * improved.
+ *
+ * @implNote
+ * This annotation only takes effect for methods or constructors of classes
+ * loaded by the boot loader.  Annotations on methods or constructors of classes
+ * loaded outside of the boot loader are ignored.
+ */
+@Target({ElementType.METHOD, ElementType.CONSTRUCTOR})
+@Retention(RetentionPolicy.RUNTIME)
+public @interface ForceInline {
+}
diff --git a/tests/test_data/std/jdk/internal/vm/annotation/Hidden.class b/tests/test_data/std/jdk/internal/vm/annotation/Hidden.class
new file mode 100644
index 0000000000000000000000000000000000000000..1d174866584cc98374e8e34c811817eb74c5e075
GIT binary patch
literal 411
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/vm/annotation/Hidden.java b/tests/test_data/std/jdk/internal/vm/annotation/Hidden.java
new file mode 100644
index 00000000..d7c49252
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/vm/annotation/Hidden.java
@@ -0,0 +1,45 @@
+/*
+ * Copyright (c) 2019, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package jdk.internal.vm.annotation;
+
+import java.lang.annotation.*;
+
+/**
+ * A method or constructor may be annotated as "hidden" to hint it is desirable
+ * to omit it from stack traces.
+ *
+ * @implNote
+ * This annotation only takes effect for methods or constructors of classes
+ * loaded by the boot loader.  Annotations on methods or constructors of classes
+ * loaded outside of the boot loader are ignored.
+ *
+ * <p>HotSpot JVM provides diagnostic option {@code -XX:+ShowHiddenFrames} to
+ * always show "hidden" frames.
+ */
+@Target({ElementType.METHOD, ElementType.CONSTRUCTOR})
+@Retention(RetentionPolicy.RUNTIME)
+public @interface Hidden {
+}
diff --git a/tests/test_data/std/jdk/internal/vm/annotation/IntrinsicCandidate.class b/tests/test_data/std/jdk/internal/vm/annotation/IntrinsicCandidate.class
new file mode 100644
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GIT binary patch
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/vm/annotation/IntrinsicCandidate.java b/tests/test_data/std/jdk/internal/vm/annotation/IntrinsicCandidate.java
new file mode 100644
index 00000000..72484a85
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/vm/annotation/IntrinsicCandidate.java
@@ -0,0 +1,125 @@
+/*
+ * Copyright (c) 2015, 2020, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package jdk.internal.vm.annotation;
+
+import java.lang.annotation.*;
+
+/**
+ * The {@code @IntrinsicCandidate} annotation is specific to the
+ * HotSpot Virtual Machine. It indicates that an annotated method
+ * may be (but is not guaranteed to be) intrinsified by the HotSpot VM. A method
+ * is intrinsified if the HotSpot VM replaces the annotated method with hand-written
+ * assembly and/or hand-written compiler IR -- a compiler intrinsic -- to improve
+ * performance. The {@code @IntrinsicCandidate} annotation is internal to the
+ * Java libraries and is therefore not supposed to have any relevance for application
+ * code.
+ *
+ * Maintainers of the Java libraries must consider the following when
+ * modifying methods annotated with {@code @IntrinsicCandidate}.
+ *
+ * <ul>
+ * <li>When modifying a method annotated with {@code @IntrinsicCandidate},
+ * the corresponding intrinsic code in the HotSpot VM implementation must be
+ * updated to match the semantics of the annotated method.</li>
+ * <li>For some annotated methods, the corresponding intrinsic may omit some low-level
+ * checks that would be performed as a matter of course if the intrinsic is implemented
+ * using Java bytecodes. This is because individual Java bytecodes implicitly check
+ * for exceptions like {@code NullPointerException} and {@code ArrayStoreException}.
+ * If such a method is replaced by an intrinsic coded in assembly language, any
+ * checks performed as a matter of normal bytecode operation must be performed
+ * before entry into the assembly code. These checks must be performed, as
+ * appropriate, on all arguments to the intrinsic, and on other values (if any) obtained
+ * by the intrinsic through those arguments. The checks may be deduced by inspecting
+ * the non-intrinsic Java code for the method, and determining exactly which exceptions
+ * may be thrown by the code, including undeclared implicit {@code RuntimeException}s.
+ * Therefore, depending on the data accesses performed by the intrinsic,
+ * the checks may include:
+ *
+ *  <ul>
+ *  <li>null checks on references</li>
+ *  <li>range checks on primitive values used as array indexes</li>
+ *  <li>other validity checks on primitive values (e.g., for divide-by-zero conditions)</li>
+ *  <li>store checks on reference values stored into arrays</li>
+ *  <li>array length checks on arrays indexed from within the intrinsic</li>
+ *  <li>reference casts (when formal parameters are {@code Object} or some other weak type)</li>
+ *  </ul>
+ *
+ * </li>
+ *
+ * <li>Note that the receiver value ({@code this}) is passed as a extra argument
+ * to all non-static methods. If a non-static method is an intrinsic, the receiver
+ * value does not need a null check, but (as stated above) any values loaded by the
+ * intrinsic from object fields must also be checked. As a matter of clarity, it is
+ * better to make intrinisics be static methods, to make the dependency on {@code this}
+ * clear. Also, it is better to explicitly load all required values from object
+ * fields before entering the intrinsic code, and pass those values as explicit arguments.
+ * First, this may be necessary for null checks (or other checks). Second, if the
+ * intrinsic reloads the values from fields and operates on those without checks,
+ * race conditions may be able to introduce unchecked invalid values into the intrinsic.
+ * If the intrinsic needs to store a value back to an object field, that value should be
+ * returned explicitly from the intrinsic; if there are multiple return values, coders
+ * should consider buffering them in an array. Removing field access from intrinsics
+ * not only clarifies the interface with between the JVM and JDK; it also helps decouple
+ * the HotSpot and JDK implementations, since if JDK code before and after the intrinsic
+ * manages all field accesses, then intrinsics can be coded to be agnostic of object
+ * layouts.</li>
+ *
+ * Maintainers of the HotSpot VM must consider the following when modifying
+ * intrinsics.
+ *
+ * <ul>
+ * <li>When adding a new intrinsic, make sure that the corresponding method
+ * in the Java libraries is annotated with {@code @IntrinsicCandidate}
+ * and that all possible call sequences that result in calling the intrinsic contain
+ * the checks omitted by the intrinsic (if any).</li>
+ * <li>When modifying an existing intrinsic, the Java libraries must be updated
+ * to match the semantics of the intrinsic and to execute all checks omitted
+ * by the intrinsic (if any).</li>
+ * </ul>
+ *
+ * Persons not directly involved with maintaining the Java libraries or the
+ * HotSpot VM can safely ignore the fact that a method is annotated with
+ * {@code @IntrinsicCandidate}.
+ *
+ * The HotSpot VM defines (internally) a list of intrinsics. Not all intrinsic
+ * are available on all platforms supported by the HotSpot VM. Furthermore,
+ * the availability of an intrinsic on a given platform depends on the
+ * configuration of the HotSpot VM (e.g., the set of VM flags enabled).
+ * Therefore, annotating a method with {@code @IntrinsicCandidate} does
+ * not guarantee that the marked method is intrinsified by the HotSpot VM.
+ *
+ * If the {@code CheckIntrinsics} VM flag is enabled, the HotSpot VM checks
+ * (when loading a class) that (1) all methods of that class that are also on
+ * the VM's list of intrinsics are annotated with {@code @IntrinsicCandidate}
+ * and that (2) for all methods of that class annotated with
+ * {@code @IntrinsicCandidate} there is an intrinsic in the list.
+ *
+ * @since 16
+ */
+@Target({ElementType.METHOD, ElementType.CONSTRUCTOR})
+@Retention(RetentionPolicy.RUNTIME)
+public @interface IntrinsicCandidate {
+}
diff --git a/tests/test_data/std/jdk/internal/vm/annotation/JvmtiMountTransition.class b/tests/test_data/std/jdk/internal/vm/annotation/JvmtiMountTransition.class
new file mode 100644
index 0000000000000000000000000000000000000000..1474eb63eb36ee59fdb9d8226831c650bf284b90
GIT binary patch
literal 420
zcmaiwzfQwI42OR%w1M)kj0hnRLr3lbm=FX}L?{Y@h3Ois>cZuMl1rq%8Uqi&Lsd8o
zlpzv>&$9jLvwUC6k52%X*bmSnsO<Gk8Rxll+Nvg3+PT7OZwjYwo7|hIsGUzr?JCnY
z1FRE9nQpYQ+RfE;mT~F>3<$@o?jOm;ua7W%Eb21lYh#&k(4{|X9Wsk$smb}-RAy#*
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/vm/annotation/JvmtiMountTransition.java b/tests/test_data/std/jdk/internal/vm/annotation/JvmtiMountTransition.java
new file mode 100644
index 00000000..df0545e4
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/vm/annotation/JvmtiMountTransition.java
@@ -0,0 +1,40 @@
+/*
+ * Copyright (c) 2021, 2022, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package jdk.internal.vm.annotation;
+
+import java.lang.annotation.*;
+
+/**
+ * A method is annotated as "jvmti mount transition" if it starts
+ * or ends virtual thread mount state transition (VTMS transition).
+ *
+ * @implNote
+ * This annotation is only used for VirtualThread methods.
+ */
+@Target({ElementType.METHOD})
+@Retention(RetentionPolicy.RUNTIME)
+public @interface JvmtiMountTransition {
+}
diff --git a/tests/test_data/std/jdk/internal/vm/annotation/ReservedStackAccess.class b/tests/test_data/std/jdk/internal/vm/annotation/ReservedStackAccess.class
new file mode 100644
index 0000000000000000000000000000000000000000..561eace27e10edb469937d5677d59a3813ff9458
GIT binary patch
literal 437
zcmaiwy-ve06oroiZJ_0+Fu{PR7&_Juz*LnWkZ6MvmxakquPUdGgAylFUyXqW;Gqx>
z17(QB;Ct<R&-sqz&#(6n08^a%@EFGFYQvSWR2ZpwopEVQZlzVZ;SrTo)U=ANOg57w
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z)l$<AQ8EmlT4N%z<UF~#W$4sWS1w`nkMud$D%m=NA1&tMaTYLKwOfQN)?}UXrhOl1
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Lg-1BWpebkH!c2dP

literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/vm/annotation/ReservedStackAccess.java b/tests/test_data/std/jdk/internal/vm/annotation/ReservedStackAccess.java
new file mode 100644
index 00000000..a421b6d2
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/vm/annotation/ReservedStackAccess.java
@@ -0,0 +1,52 @@
+/*
+ * Copyright (c) 2015, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package jdk.internal.vm.annotation;
+
+import java.lang.annotation.ElementType;
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+import java.lang.annotation.Target;
+
+/**
+ * <p>An annotation expressing that a method is especially sensitive
+ * to stack overflows. This is a hint the JVM can use to grant access to
+ * extra stack space when executing this code if such feature is supported
+ * by the JVM. The JVM is free to ignore this annotation.
+ *
+ * A possible way for the JVM to improve the execution context for methods
+ * with this annotation is to reserve part of the thread's execution stack
+ * for them. Access to this section of the stack would be denied by default
+ * but could be granted if the JVM detects a possible stack overflow and
+ * the thread's call stack includes at least one annotated method. Even if
+ * access to this reserved area has been granted, the JVM might decide to
+ * throw a delayed StackOverflowError when the thread exits the annotated
+ * method.
+ *
+ * @since 9
+ */
+@Retention(RetentionPolicy.RUNTIME)
+@Target({ElementType.METHOD, ElementType.CONSTRUCTOR})
+public @interface ReservedStackAccess { }
diff --git a/tests/test_data/std/jdk/internal/vm/annotation/Stable.class b/tests/test_data/std/jdk/internal/vm/annotation/Stable.class
new file mode 100644
index 0000000000000000000000000000000000000000..4181cf58b6cbfaac3f1edec703b5dd5353e2ac37
GIT binary patch
literal 391
zcmaiw%TB{U3`MUCWuWCzmIxspi!PZDV1*!+DwT)Qz=qW{Sk;8d1f`Qm{WTVR03U^L
zK%y)nv9L$B&%M_8<MZtuz!mltI)u~g`9)hFxb(*9I@iYgBA8$cucyJx94o972AQdi
zcE->3-7MoYC~OdpSKU9d%U=gVZ(3Ak$|LKT(El+!Z&ZYXxbnf~{Ad?e)~r+u!qKGF
zIWgs&!v&#R8&`?rSvwaw&e?}#`N|DE8b_0B!bv+Ea}ZYkE9mea<i2n=T?(k;hudU)
l6AcN3HHog=6zD*G=S^(Mdnk2JX8k7+V;eizZ7Rkd245gnaJm2h

literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/vm/annotation/Stable.java b/tests/test_data/std/jdk/internal/vm/annotation/Stable.java
new file mode 100644
index 00000000..0d1eb97b
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/vm/annotation/Stable.java
@@ -0,0 +1,90 @@
+/*
+ * Copyright (c) 2012, 2013, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package jdk.internal.vm.annotation;
+
+import java.lang.annotation.*;
+
+/**
+ * A field may be annotated as stable if all of its component variables
+ * changes value at most once.
+ * A field's value counts as its component value.
+ * If the field is typed as an array, then all the non-null components
+ * of the array, of depth up to the rank of the field's array type,
+ * also count as component values.
+ * By extension, any variable (either array or field) which has annotated
+ * as stable is called a stable variable, and its non-null or non-zero
+ * value is called a stable value.
+ * <p>
+ * Since all fields begin with a default value of null for references
+ * (resp., zero for primitives), it follows that this annotation indicates
+ * that the first non-null (resp., non-zero) value stored in the field
+ * will never be changed.
+ * <p>
+ * If the field is not of an array type, there are no array elements,
+ * then the value indicated as stable is simply the value of the field.
+ * If the dynamic type of the field value is an array but the static type
+ * is not, the components of the array are <em>not</em> regarded as stable.
+ * <p>
+ * If the field is an array type, then both the field value and
+ * all the components of the field value (if the field value is non-null)
+ * are indicated to be stable.
+ * If the field type is an array type with rank {@code N > 1},
+ * then each component of the field value (if the field value is non-null),
+ * is regarded as a stable array of rank {@code N-1}.
+ * <p>
+ * Fields which are declared {@code final} may also be annotated as stable.
+ * Since final fields already behave as stable values, such an annotation
+ * conveys no additional information regarding change of the field's value, but
+ * still conveys information regarding change of additional components values if
+ * the type of the field is an array type (as described above).
+ * <p>
+ * The HotSpot VM relies on this annotation to promote a non-null (resp.,
+ * non-zero) component value to a constant, thereby enabling superior
+ * optimizations of code depending on such a value (such as constant folding).
+ * More specifically, the HotSpot VM will process non-null stable fields (final
+ * or otherwise) in a similar manner to static final fields with respect to
+ * promoting the field's value to a constant.  Thus, placing aside the
+ * differences for null/non-null values and arrays, a final stable field is
+ * treated as if it is really final from both the Java language and the HotSpot
+ * VM.
+ * <p>
+ * It is (currently) undefined what happens if a field annotated as stable
+ * is given a third value (by explicitly updating a stable field, a component of
+ * a stable array, or a final stable field via reflection or other means).
+ * Since the HotSpot VM promotes a non-null component value to constant, it may
+ * be that the Java memory model would appear to be broken, if such a constant
+ * (the second value of the field) is used as the value of the field even after
+ * the field value has changed (to a third value).
+ *
+ * @implNote
+ * This annotation only takes effect for fields of classes loaded by the boot
+ * loader.  Annotations on fields of classes loaded outside of the boot loader
+ * are ignored.
+ */
+@Target(ElementType.FIELD)
+@Retention(RetentionPolicy.RUNTIME)
+public @interface Stable {
+}
diff --git a/tests/test_data/std/jdk/internal/vm/vector/VectorSupport$BinaryOperation.class b/tests/test_data/std/jdk/internal/vm/vector/VectorSupport$BinaryOperation.class
new file mode 100644
index 0000000000000000000000000000000000000000..f8d45fd94016defa794e945e4403fffff662da0c
GIT binary patch
literal 816
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/vm/vector/VectorSupport$CompressExpandOperation.class b/tests/test_data/std/jdk/internal/vm/vector/VectorSupport$CompressExpandOperation.class
new file mode 100644
index 0000000000000000000000000000000000000000..615f799e05fb5809ec8c528cd1c6907c68085040
GIT binary patch
literal 877
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/vm/vector/VectorSupport$FromBitsCoercedOperation.class b/tests/test_data/std/jdk/internal/vm/vector/VectorSupport$FromBitsCoercedOperation.class
new file mode 100644
index 0000000000000000000000000000000000000000..15b722efd5a1d0c415c2b9df811139421182ec7b
GIT binary patch
literal 739
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/vm/vector/VectorSupport$IndexOperation.class b/tests/test_data/std/jdk/internal/vm/vector/VectorSupport$IndexOperation.class
new file mode 100644
index 0000000000000000000000000000000000000000..977e2bb5fe16a85e501150edfd4bba9dba537978
GIT binary patch
literal 737
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/vm/vector/VectorSupport$IndexPartiallyInUpperRangeOperation.class b/tests/test_data/std/jdk/internal/vm/vector/VectorSupport$IndexPartiallyInUpperRangeOperation.class
new file mode 100644
index 0000000000000000000000000000000000000000..5be2abdb3ba923292c2bac3391bcf441ae1deae3
GIT binary patch
literal 579
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/vm/vector/VectorSupport$LoadOperation.class b/tests/test_data/std/jdk/internal/vm/vector/VectorSupport$LoadOperation.class
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index 0000000000000000000000000000000000000000..fc525baf17c4c6047f004a0afeb4e22402c642e7
GIT binary patch
literal 754
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/vm/vector/VectorSupport$LoadVectorMaskedOperation.class b/tests/test_data/std/jdk/internal/vm/vector/VectorSupport$LoadVectorMaskedOperation.class
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index 0000000000000000000000000000000000000000..f9d5565ed498bbafa0fb615aebc964273bf98d68
GIT binary patch
literal 931
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/vm/vector/VectorSupport$LoadVectorOperationWithMap.class b/tests/test_data/std/jdk/internal/vm/vector/VectorSupport$LoadVectorOperationWithMap.class
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index 0000000000000000000000000000000000000000..cf327de7bfabb6cbf14b8b9e64f233e0a7042d9e
GIT binary patch
literal 946
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literal 0
HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/vm/vector/VectorSupport$ReductionOperation.class b/tests/test_data/std/jdk/internal/vm/vector/VectorSupport$ReductionOperation.class
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index 0000000000000000000000000000000000000000..b3ca9227762175f19bb6da41e46bced3130e763e
GIT binary patch
literal 685
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diff --git a/tests/test_data/std/jdk/internal/vm/vector/VectorSupport$ShuffleIotaOperation.class b/tests/test_data/std/jdk/internal/vm/vector/VectorSupport$ShuffleIotaOperation.class
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diff --git a/tests/test_data/std/jdk/internal/vm/vector/VectorSupport$ShuffleToVectorOperation.class b/tests/test_data/std/jdk/internal/vm/vector/VectorSupport$ShuffleToVectorOperation.class
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diff --git a/tests/test_data/std/jdk/internal/vm/vector/VectorSupport$StoreVectorOperation.class b/tests/test_data/std/jdk/internal/vm/vector/VectorSupport$StoreVectorOperation.class
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GIT binary patch
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diff --git a/tests/test_data/std/jdk/internal/vm/vector/VectorSupport$StoreVectorOperationWithMap.class b/tests/test_data/std/jdk/internal/vm/vector/VectorSupport$StoreVectorOperationWithMap.class
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GIT binary patch
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diff --git a/tests/test_data/std/jdk/internal/vm/vector/VectorSupport$TernaryOperation.class b/tests/test_data/std/jdk/internal/vm/vector/VectorSupport$TernaryOperation.class
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diff --git a/tests/test_data/std/jdk/internal/vm/vector/VectorSupport$UnaryOperation.class b/tests/test_data/std/jdk/internal/vm/vector/VectorSupport$UnaryOperation.class
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diff --git a/tests/test_data/std/jdk/internal/vm/vector/VectorSupport$VecExtractOp.class b/tests/test_data/std/jdk/internal/vm/vector/VectorSupport$VecExtractOp.class
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diff --git a/tests/test_data/std/jdk/internal/vm/vector/VectorSupport$VecInsertOp.class b/tests/test_data/std/jdk/internal/vm/vector/VectorSupport$VecInsertOp.class
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diff --git a/tests/test_data/std/jdk/internal/vm/vector/VectorSupport$Vector.class b/tests/test_data/std/jdk/internal/vm/vector/VectorSupport$Vector.class
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diff --git a/tests/test_data/std/jdk/internal/vm/vector/VectorSupport$VectorBlendOp.class b/tests/test_data/std/jdk/internal/vm/vector/VectorSupport$VectorBlendOp.class
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diff --git a/tests/test_data/std/jdk/internal/vm/vector/VectorSupport$VectorBroadcastIntOp.class b/tests/test_data/std/jdk/internal/vm/vector/VectorSupport$VectorBroadcastIntOp.class
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diff --git a/tests/test_data/std/jdk/internal/vm/vector/VectorSupport$VectorCompareOp.class b/tests/test_data/std/jdk/internal/vm/vector/VectorSupport$VectorCompareOp.class
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diff --git a/tests/test_data/std/jdk/internal/vm/vector/VectorSupport$VectorConvertOp.class b/tests/test_data/std/jdk/internal/vm/vector/VectorSupport$VectorConvertOp.class
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diff --git a/tests/test_data/std/jdk/internal/vm/vector/VectorSupport$VectorMask.class b/tests/test_data/std/jdk/internal/vm/vector/VectorSupport$VectorMask.class
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diff --git a/tests/test_data/std/jdk/internal/vm/vector/VectorSupport$VectorMaskOp.class b/tests/test_data/std/jdk/internal/vm/vector/VectorSupport$VectorMaskOp.class
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diff --git a/tests/test_data/std/jdk/internal/vm/vector/VectorSupport$VectorPayload.class b/tests/test_data/std/jdk/internal/vm/vector/VectorSupport$VectorPayload.class
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diff --git a/tests/test_data/std/jdk/internal/vm/vector/VectorSupport$VectorRearrangeOp.class b/tests/test_data/std/jdk/internal/vm/vector/VectorSupport$VectorRearrangeOp.class
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diff --git a/tests/test_data/std/jdk/internal/vm/vector/VectorSupport$VectorShuffle.class b/tests/test_data/std/jdk/internal/vm/vector/VectorSupport$VectorShuffle.class
new file mode 100644
index 0000000000000000000000000000000000000000..eb8a599b8a6d0b627222a47b49540cd5ea26da5f
GIT binary patch
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diff --git a/tests/test_data/std/jdk/internal/vm/vector/VectorSupport$VectorSpecies.class b/tests/test_data/std/jdk/internal/vm/vector/VectorSupport$VectorSpecies.class
new file mode 100644
index 0000000000000000000000000000000000000000..edc2176048cf7732dd221437ff69b8d0a8039997
GIT binary patch
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literal 0
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diff --git a/tests/test_data/std/jdk/internal/vm/vector/VectorSupport.class b/tests/test_data/std/jdk/internal/vm/vector/VectorSupport.class
new file mode 100644
index 0000000000000000000000000000000000000000..937db7789e6ab6ccadfb6dc36e1366ab343e29bd
GIT binary patch
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HcmV?d00001

diff --git a/tests/test_data/std/jdk/internal/vm/vector/VectorSupport.java b/tests/test_data/std/jdk/internal/vm/vector/VectorSupport.java
new file mode 100644
index 00000000..ccfa006b
--- /dev/null
+++ b/tests/test_data/std/jdk/internal/vm/vector/VectorSupport.java
@@ -0,0 +1,738 @@
+/*
+ * Copyright (c) 2020, 2023, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package jdk.internal.vm.vector;
+
+import jdk.internal.vm.annotation.IntrinsicCandidate;
+import jdk.internal.misc.Unsafe;
+
+import java.util.function.*;
+
+public class VectorSupport {
+    static {
+        registerNatives();
+    }
+
+    private static final Unsafe U = Unsafe.getUnsafe();
+
+    // Unary
+    public static final int VECTOR_OP_ABS  = 0;
+    public static final int VECTOR_OP_NEG  = 1;
+    public static final int VECTOR_OP_SQRT = 2;
+    public static final int VECTOR_OP_BIT_COUNT = 3;
+
+    // Binary
+    public static final int VECTOR_OP_ADD  = 4;
+    public static final int VECTOR_OP_SUB  = 5;
+    public static final int VECTOR_OP_MUL  = 6;
+    public static final int VECTOR_OP_DIV  = 7;
+    public static final int VECTOR_OP_MIN  = 8;
+    public static final int VECTOR_OP_MAX  = 9;
+
+    public static final int VECTOR_OP_AND  = 10;
+    public static final int VECTOR_OP_OR   = 11;
+    public static final int VECTOR_OP_XOR  = 12;
+
+    // Ternary
+    public static final int VECTOR_OP_FMA  = 13;
+
+    // Broadcast int
+    public static final int VECTOR_OP_LSHIFT  = 14;
+    public static final int VECTOR_OP_RSHIFT  = 15;
+    public static final int VECTOR_OP_URSHIFT = 16;
+
+    public static final int VECTOR_OP_CAST        = 17;
+    public static final int VECTOR_OP_UCAST       = 18;
+    public static final int VECTOR_OP_REINTERPRET = 19;
+
+    // Mask manipulation operations
+    public static final int VECTOR_OP_MASK_TRUECOUNT = 20;
+    public static final int VECTOR_OP_MASK_FIRSTTRUE = 21;
+    public static final int VECTOR_OP_MASK_LASTTRUE  = 22;
+    public static final int VECTOR_OP_MASK_TOLONG    = 23;
+
+    // Rotate operations
+    public static final int VECTOR_OP_LROTATE = 24;
+    public static final int VECTOR_OP_RROTATE = 25;
+
+    // Compression expansion operations
+    public static final int VECTOR_OP_COMPRESS = 26;
+    public static final int VECTOR_OP_EXPAND = 27;
+    public static final int VECTOR_OP_MASK_COMPRESS = 28;
+
+    // Leading/Trailing zeros count operations
+    public static final int VECTOR_OP_TZ_COUNT  = 29;
+    public static final int VECTOR_OP_LZ_COUNT  = 30;
+
+    // Reverse operation
+    public static final int VECTOR_OP_REVERSE   = 31;
+    public static final int VECTOR_OP_REVERSE_BYTES = 32;
+
+    // Compress and Expand Bits operation
+    public static final int VECTOR_OP_COMPRESS_BITS = 33;
+    public static final int VECTOR_OP_EXPAND_BITS = 34;
+
+    // Math routines
+    public static final int VECTOR_OP_TAN = 101;
+    public static final int VECTOR_OP_TANH = 102;
+    public static final int VECTOR_OP_SIN = 103;
+    public static final int VECTOR_OP_SINH = 104;
+    public static final int VECTOR_OP_COS = 105;
+    public static final int VECTOR_OP_COSH = 106;
+    public static final int VECTOR_OP_ASIN = 107;
+    public static final int VECTOR_OP_ACOS = 108;
+    public static final int VECTOR_OP_ATAN = 109;
+    public static final int VECTOR_OP_ATAN2 = 110;
+    public static final int VECTOR_OP_CBRT = 111;
+    public static final int VECTOR_OP_LOG = 112;
+    public static final int VECTOR_OP_LOG10 = 113;
+    public static final int VECTOR_OP_LOG1P = 114;
+    public static final int VECTOR_OP_POW = 115;
+    public static final int VECTOR_OP_EXP = 116;
+    public static final int VECTOR_OP_EXPM1 = 117;
+    public static final int VECTOR_OP_HYPOT = 118;
+
+    // See src/hotspot/share/opto/subnode.hpp
+    //     struct BoolTest, and enclosed enum mask
+    public static final int BT_eq = 0;  // 0000
+    public static final int BT_ne = 4;  // 0100
+    public static final int BT_le = 5;  // 0101
+    public static final int BT_ge = 7;  // 0111
+    public static final int BT_lt = 3;  // 0011
+    public static final int BT_gt = 1;  // 0001
+    public static final int BT_overflow = 2;     // 0010
+    public static final int BT_no_overflow = 6;  // 0110
+    // never = 8    1000
+    // illegal = 9  1001
+    // Unsigned comparisons apply to BT_le, BT_ge, BT_lt, BT_gt for integral types
+    public static final int BT_unsigned_compare = 0b10000;
+    public static final int BT_ule = BT_le | BT_unsigned_compare;
+    public static final int BT_uge = BT_ge | BT_unsigned_compare;
+    public static final int BT_ult = BT_lt | BT_unsigned_compare;
+    public static final int BT_ugt = BT_gt | BT_unsigned_compare;
+
+    // Various broadcasting modes.
+    public static final int MODE_BROADCAST = 0;
+    public static final int MODE_BITS_COERCED_LONG_TO_MASK = 1;
+
+    // BasicType codes, for primitives only:
+    public static final int
+        T_FLOAT   = 6,
+        T_DOUBLE  = 7,
+        T_BYTE    = 8,
+        T_SHORT   = 9,
+        T_INT     = 10,
+        T_LONG    = 11;
+
+    /* ============================================================================ */
+
+    public static class VectorSpecies<E> {}
+
+    /**
+     * @hidden
+     */
+    public static class VectorPayload {
+        private final Object payload; // array of primitives
+
+        public VectorPayload(Object payload) {
+            this.payload = payload;
+        }
+
+        protected final Object getPayload() {
+            return VectorSupport.maybeRebox(this).payload;
+        }
+    }
+
+    /**
+     * @hidden
+     */
+    public static class Vector<E> extends VectorPayload {
+        public Vector(Object payload) {
+            super(payload);
+        }
+    }
+
+    /**
+     * @hidden
+     */
+    public static class VectorShuffle<E> extends VectorPayload {
+        public VectorShuffle(Object payload) {
+            super(payload);
+        }
+    }
+    /**
+     * @hidden
+     */
+    public static class VectorMask<E> extends VectorPayload {
+        public VectorMask(Object payload) {
+            super(payload);
+        }
+    }
+
+    /* ============================================================================ */
+    public interface FromBitsCoercedOperation<VM extends VectorPayload,
+                                              S extends VectorSpecies<?>> {
+        VM fromBits(long l, S s);
+    }
+
+    @IntrinsicCandidate
+    public static
+    <VM extends VectorPayload,
+     S extends VectorSpecies<E>,
+     E>
+    VM fromBitsCoerced(Class<? extends VM> vmClass, Class<E> eClass,
+                       int length,
+                       long bits, int mode, S s,
+                       FromBitsCoercedOperation<VM, S> defaultImpl) {
+        assert isNonCapturingLambda(defaultImpl) : defaultImpl;
+        return defaultImpl.fromBits(bits, s);
+    }
+
+    /* ============================================================================ */
+    public interface IndexPartiallyInUpperRangeOperation<E,
+                                                         M extends VectorMask<E>> {
+        M apply(long offset, long limit);
+    }
+
+    @IntrinsicCandidate
+    public static
+    <E,
+     M extends VectorMask<E>>
+    M indexPartiallyInUpperRange(Class<? extends M> mClass, Class<E> eClass,
+                                 int length, long offset, long limit,
+                                 IndexPartiallyInUpperRangeOperation<E, M> defaultImpl) {
+        assert isNonCapturingLambda(defaultImpl) : defaultImpl;
+        return defaultImpl.apply(offset, limit);
+    }
+
+    /* ============================================================================ */
+    public interface ShuffleIotaOperation<S extends VectorSpecies<?>,
+                                          SH extends VectorShuffle<?>> {
+        SH apply(int length, int start, int step, S s);
+    }
+
+    @IntrinsicCandidate
+    public static
+    <E,
+     S extends VectorSpecies<E>,
+     SH extends VectorShuffle<E>>
+    SH shuffleIota(Class<E> eClass, Class<? extends SH> shClass, S s,
+                   int length,
+                   int start, int step, int wrap,
+                   ShuffleIotaOperation<S, SH> defaultImpl) {
+       assert isNonCapturingLambda(defaultImpl) : defaultImpl;
+       return defaultImpl.apply(length, start, step, s);
+    }
+
+    public interface ShuffleToVectorOperation<V extends Vector<?>,
+                                              SH extends VectorShuffle<?>> {
+       V apply(SH sh);
+    }
+
+    @IntrinsicCandidate
+    public static
+    <V extends Vector<E>,
+     SH extends VectorShuffle<E>,
+     E>
+    V shuffleToVector(Class<? extends Vector<E>> vClass, Class<E> eClass, Class<? extends SH> shClass, SH sh,
+                      int length,
+                      ShuffleToVectorOperation<V, SH> defaultImpl) {
+      assert isNonCapturingLambda(defaultImpl) : defaultImpl;
+      return defaultImpl.apply(sh);
+    }
+
+    /* ============================================================================ */
+    public interface IndexOperation<V extends Vector<?>,
+                                    S extends VectorSpecies<?>> {
+        V index(V v, int step, S s);
+    }
+
+    @IntrinsicCandidate
+    public static
+    <V extends Vector<E>,
+     E,
+     S extends VectorSpecies<E>>
+    V indexVector(Class<? extends V> vClass, Class<E> eClass,
+                  int length,
+                  V v, int step, S s,
+                  IndexOperation<V, S> defaultImpl) {
+        assert isNonCapturingLambda(defaultImpl) : defaultImpl;
+        return defaultImpl.index(v, step, s);
+    }
+
+    /* ============================================================================ */
+
+    public interface ReductionOperation<V extends Vector<?>,
+                                        M extends VectorMask<?>> {
+        long apply(V v, M m);
+    }
+
+    @IntrinsicCandidate
+    public static
+    <V extends Vector<E>,
+     M extends VectorMask<E>,
+     E>
+    long reductionCoerced(int oprId,
+                          Class<? extends V> vClass, Class<? extends M> mClass, Class<E> eClass,
+                          int length,
+                          V v, M m,
+                          ReductionOperation<V, M> defaultImpl) {
+        assert isNonCapturingLambda(defaultImpl) : defaultImpl;
+        return defaultImpl.apply(v, m);
+    }
+
+
+    /* ============================================================================ */
+
+    public interface VecExtractOp<VM extends VectorPayload> {
+        long apply(VM vm, int i);
+    }
+
+    @IntrinsicCandidate
+    public static
+    <VM extends VectorPayload,
+     E>
+    long extract(Class<? extends VM> vClass, Class<E> eClass,
+                 int length,
+                 VM vm, int i,
+                 VecExtractOp<VM> defaultImpl) {
+        assert isNonCapturingLambda(defaultImpl) : defaultImpl;
+        return defaultImpl.apply(vm, i);
+    }
+
+    /* ============================================================================ */
+
+    public interface VecInsertOp<V extends Vector<?>> {
+        V apply(V v, int i, long val);
+    }
+
+    @IntrinsicCandidate
+    public static
+    <V extends Vector<E>,
+     E>
+    V insert(Class<? extends V> vClass, Class<E> eClass,
+             int length,
+             V v, int i, long val,
+             VecInsertOp<V> defaultImpl) {
+        assert isNonCapturingLambda(defaultImpl) : defaultImpl;
+        return defaultImpl.apply(v, i, val);
+    }
+
+    /* ============================================================================ */
+
+    public interface UnaryOperation<V extends Vector<?>,
+                                    M extends VectorMask<?>> {
+        V apply(V v, M m);
+    }
+
+    @IntrinsicCandidate
+    public static
+    <V extends Vector<E>,
+     M extends VectorMask<E>,
+     E>
+    V unaryOp(int oprId,
+              Class<? extends V> vClass, Class<? extends M> mClass, Class<E> eClass,
+              int length,
+              V v, M m,
+              UnaryOperation<V, M> defaultImpl) {
+        assert isNonCapturingLambda(defaultImpl) : defaultImpl;
+        return defaultImpl.apply(v, m);
+    }
+
+    /* ============================================================================ */
+
+    public interface BinaryOperation<VM extends VectorPayload,
+                                     M extends VectorMask<?>> {
+        VM apply(VM v1, VM v2, M m);
+    }
+
+    @IntrinsicCandidate
+    public static
+    <VM extends VectorPayload,
+     M extends VectorMask<E>,
+     E>
+    VM binaryOp(int oprId,
+                Class<? extends VM> vmClass, Class<? extends M> mClass, Class<E> eClass,
+                int length,
+                VM v1, VM v2, M m,
+                BinaryOperation<VM, M> defaultImpl) {
+        assert isNonCapturingLambda(defaultImpl) : defaultImpl;
+        return defaultImpl.apply(v1, v2, m);
+    }
+
+    /* ============================================================================ */
+
+    public interface TernaryOperation<V extends Vector<?>,
+                                      M extends VectorMask<?>> {
+        V apply(V v1, V v2, V v3, M m);
+    }
+
+    @IntrinsicCandidate
+    public static
+    <V extends Vector<E>,
+     M extends VectorMask<E>,
+     E>
+    V ternaryOp(int oprId,
+                Class<? extends V> vClass, Class<? extends M> mClass, Class<E> eClass,
+                int length,
+                V v1, V v2, V v3, M m,
+                TernaryOperation<V, M> defaultImpl) {
+        assert isNonCapturingLambda(defaultImpl) : defaultImpl;
+        return defaultImpl.apply(v1, v2, v3, m);
+    }
+
+    /* ============================================================================ */
+
+    // Memory operations
+
+    public interface LoadOperation<C,
+                                   VM extends VectorPayload,
+                                   S extends VectorSpecies<?>> {
+        VM load(C container, long index, S s);
+    }
+
+    @IntrinsicCandidate
+    public static
+    <C,
+     VM extends VectorPayload,
+     E,
+     S extends VectorSpecies<E>>
+    VM load(Class<? extends VM> vmClass, Class<E> eClass,
+            int length,
+            Object base, long offset, boolean fromSegment,
+            C container, long index, S s,
+            LoadOperation<C, VM, S> defaultImpl) {
+        assert isNonCapturingLambda(defaultImpl) : defaultImpl;
+        return defaultImpl.load(container, index, s);
+    }
+
+    /* ============================================================================ */
+
+    public interface LoadVectorMaskedOperation<C,
+                                               V extends Vector<?>,
+                                               S extends VectorSpecies<?>,
+                                               M extends VectorMask<?>> {
+        V load(C container, long index, S s, M m);
+    }
+
+    @IntrinsicCandidate
+    public static
+    <C,
+     V extends Vector<?>,
+     E,
+     S extends VectorSpecies<E>,
+     M extends VectorMask<E>>
+    V loadMasked(Class<? extends V> vClass, Class<M> mClass, Class<E> eClass,
+                 int length, Object base, long offset, boolean fromSegment,
+                 M m, int offsetInRange,
+                 C container, long index, S s,
+                 LoadVectorMaskedOperation<C, V, S, M> defaultImpl) {
+        assert isNonCapturingLambda(defaultImpl) : defaultImpl;
+        return defaultImpl.load(container, index, s, m);
+    }
+
+    /* ============================================================================ */
+
+    public interface LoadVectorOperationWithMap<C,
+                                                V extends Vector<?>,
+                                                S extends VectorSpecies<?>,
+                                                M extends VectorMask<?>> {
+        V loadWithMap(C container, int index, int[] indexMap, int indexM, S s, M m);
+    }
+
+    @IntrinsicCandidate
+    public static
+    <C,
+     V extends Vector<?>,
+     W extends Vector<Integer>,
+     S extends VectorSpecies<E>,
+     M extends VectorMask<E>,
+     E>
+    V loadWithMap(Class<? extends V> vClass, Class<M> mClass, Class<E> eClass,
+                  int length,
+                  Class<? extends Vector<Integer>> vectorIndexClass,
+                  Object base, long offset,
+                  W index_vector,
+                  M m, C container, int index, int[] indexMap, int indexM, S s,
+                  LoadVectorOperationWithMap<C, V, S, M> defaultImpl) {
+        assert isNonCapturingLambda(defaultImpl) : defaultImpl;
+        return defaultImpl.loadWithMap(container, index, indexMap, indexM, s, m);
+    }
+
+    /* ============================================================================ */
+
+    public interface StoreVectorOperation<C,
+                                          V extends VectorPayload> {
+        void store(C container, long index, V v);
+    }
+
+    @IntrinsicCandidate
+    public static
+    <C,
+     V extends VectorPayload>
+    void store(Class<?> vClass, Class<?> eClass,
+               int length,
+               Object base, long offset, boolean fromSegment,
+               V v, C container, long index,
+               StoreVectorOperation<C, V> defaultImpl) {
+        assert isNonCapturingLambda(defaultImpl) : defaultImpl;
+        defaultImpl.store(container, index, v);
+    }
+
+    public interface StoreVectorMaskedOperation<C,
+                                                V extends Vector<?>,
+                                                M extends VectorMask<?>> {
+        void store(C container, long index, V v, M m);
+    }
+
+    @IntrinsicCandidate
+    public static
+    <C,
+     V extends Vector<E>,
+     M extends VectorMask<E>,
+     E>
+    void storeMasked(Class<? extends V> vClass, Class<M> mClass, Class<E> eClass,
+                     int length,
+                     Object base, long offset, boolean fromSegment,
+                     V v, M m, C container, long index,
+                     StoreVectorMaskedOperation<C, V, M> defaultImpl) {
+        assert isNonCapturingLambda(defaultImpl) : defaultImpl;
+        defaultImpl.store(container, index, v, m);
+    }
+
+    /* ============================================================================ */
+
+    public interface StoreVectorOperationWithMap<C,
+                                                 V extends Vector<?>,
+                                                 M extends VectorMask<?>> {
+        void storeWithMap(C container, int index, V v, int[] indexMap, int indexM, M m);
+    }
+
+    @IntrinsicCandidate
+    public static
+    <C,
+     V extends Vector<E>,
+     W extends Vector<Integer>,
+     M extends VectorMask<E>,
+     E>
+    void storeWithMap(Class<? extends V> vClass, Class<M> mClass, Class<E> eClass,
+                      int length,
+                      Class<? extends Vector<Integer>> vectorIndexClass,
+                      Object base, long offset,
+                      W index_vector,
+                      V v, M m, C container, int index, int[] indexMap, int indexM,
+                      StoreVectorOperationWithMap<C, V, M> defaultImpl) {
+        assert isNonCapturingLambda(defaultImpl) : defaultImpl;
+        defaultImpl.storeWithMap(container, index, v, indexMap, indexM, m);
+    }
+
+    /* ============================================================================ */
+
+    @IntrinsicCandidate
+    public static
+    <M extends VectorMask<E>,
+     E>
+    boolean test(int cond,
+                 Class<?> mClass, Class<?> eClass,
+                 int length,
+                 M m1, M m2,
+                 BiFunction<M, M, Boolean> defaultImpl) {
+        assert isNonCapturingLambda(defaultImpl) : defaultImpl;
+        return defaultImpl.apply(m1, m2);
+    }
+
+    /* ============================================================================ */
+
+    public interface VectorCompareOp<V extends Vector<?>,
+                                     M extends VectorMask<?>> {
+        M apply(int cond, V v1, V v2, M m);
+    }
+
+    @IntrinsicCandidate
+    public static
+    <V extends Vector<E>,
+     M extends VectorMask<E>,
+     E>
+    M compare(int cond,
+              Class<? extends V> vectorClass, Class<M> mClass, Class<E> eClass,
+              int length,
+              V v1, V v2, M m,
+              VectorCompareOp<V, M> defaultImpl) {
+        assert isNonCapturingLambda(defaultImpl) : defaultImpl;
+        return defaultImpl.apply(cond, v1, v2, m);
+    }
+
+    /* ============================================================================ */
+    public interface VectorRearrangeOp<V extends Vector<?>,
+                                       SH extends VectorShuffle<?>,
+                                       M extends VectorMask<?>> {
+        V apply(V v, SH sh, M m);
+    }
+
+    @IntrinsicCandidate
+    public static
+    <V extends Vector<E>,
+     SH extends VectorShuffle<E>,
+     M  extends VectorMask<E>,
+     E>
+    V rearrangeOp(Class<? extends V> vClass, Class<SH> shClass, Class<M> mClass, Class<E> eClass,
+                  int length,
+                  V v, SH sh, M m,
+                  VectorRearrangeOp<V, SH, M> defaultImpl) {
+        assert isNonCapturingLambda(defaultImpl) : defaultImpl;
+        return defaultImpl.apply(v, sh, m);
+    }
+
+    /* ============================================================================ */
+
+    public interface VectorBlendOp<V extends Vector<?>,
+                                   M extends VectorMask<?>> {
+        V apply(V v1, V v2, M m);
+    }
+
+    @IntrinsicCandidate
+    public static
+    <V extends Vector<E>,
+     M extends VectorMask<E>,
+     E>
+    V blend(Class<? extends V> vClass, Class<M> mClass, Class<E> eClass,
+            int length,
+            V v1, V v2, M m,
+            VectorBlendOp<V, M> defaultImpl) {
+        assert isNonCapturingLambda(defaultImpl) : defaultImpl;
+        return defaultImpl.apply(v1, v2, m);
+    }
+
+    /* ============================================================================ */
+
+    public interface VectorBroadcastIntOp<V extends Vector<?>,
+                                          M extends VectorMask<?>> {
+        V apply(V v, int n, M m);
+    }
+
+    @IntrinsicCandidate
+    public static
+    <V extends Vector<E>,
+     M extends VectorMask<E>,
+     E>
+    V broadcastInt(int opr,
+                   Class<? extends V> vClass, Class<? extends M> mClass, Class<E> eClass,
+                   int length,
+                   V v, int n, M m,
+                   VectorBroadcastIntOp<V, M> defaultImpl) {
+        assert isNonCapturingLambda(defaultImpl) : defaultImpl;
+        return defaultImpl.apply(v, n, m);
+    }
+
+    /* ============================================================================ */
+
+    public interface VectorConvertOp<VOUT extends VectorPayload,
+                                     VIN extends VectorPayload,
+                                     S extends VectorSpecies<?>> {
+        VOUT apply(VIN v, S s);
+    }
+
+    // Users of this intrinsic assume that it respects
+    // REGISTER_ENDIAN, which is currently ByteOrder.LITTLE_ENDIAN.
+    // See javadoc for REGISTER_ENDIAN.
+
+    @IntrinsicCandidate
+    public static <VOUT extends VectorPayload,
+                    VIN extends VectorPayload,
+                      S extends VectorSpecies<?>>
+    VOUT convert(int oprId,
+              Class<?> fromVectorClass, Class<?> fromeClass, int fromVLen,
+              Class<?>   toVectorClass, Class<?>   toeClass, int   toVLen,
+              VIN v, S s,
+              VectorConvertOp<VOUT, VIN, S> defaultImpl) {
+        assert isNonCapturingLambda(defaultImpl) : defaultImpl;
+        return defaultImpl.apply(v, s);
+    }
+
+    /* ============================================================================ */
+
+    public interface CompressExpandOperation<V extends Vector<?>,
+                                     M extends VectorMask<?>> {
+        VectorPayload apply(V v, M m);
+    }
+
+    @IntrinsicCandidate
+    public static
+    <V extends Vector<E>,
+     M extends VectorMask<E>,
+     E>
+    VectorPayload compressExpandOp(int opr,
+                                   Class<? extends V> vClass, Class<? extends M> mClass, Class<E> eClass,
+                                   int length, V v, M m,
+                                   CompressExpandOperation<V, M> defaultImpl) {
+        assert isNonCapturingLambda(defaultImpl) : defaultImpl;
+        return defaultImpl.apply(v, m);
+    }
+
+    /* ============================================================================ */
+
+    @IntrinsicCandidate
+    public static
+    <VP extends VectorPayload>
+    VP maybeRebox(VP v) {
+        // The fence is added here to avoid memory aliasing problems in C2 between scalar & vector accesses.
+        // TODO: move the fence generation into C2. Generate only when reboxing is taking place.
+        U.loadFence();
+        return v;
+    }
+
+    /* ============================================================================ */
+    public interface VectorMaskOp<M extends VectorMask<?>> {
+        long apply(M m);
+    }
+
+    @IntrinsicCandidate
+    public static
+    <M extends VectorMask<E>,
+     E>
+    long maskReductionCoerced(int oper,
+                              Class<? extends M> mClass, Class<?> eClass,
+                              int length,
+                              M m,
+                              VectorMaskOp<M> defaultImpl) {
+       assert isNonCapturingLambda(defaultImpl) : defaultImpl;
+       return defaultImpl.apply(m);
+    }
+
+    /* ============================================================================ */
+
+    // query the JVM's supported vector sizes and types
+    public static native int getMaxLaneCount(Class<?> etype);
+
+    /* ============================================================================ */
+
+    public static boolean isNonCapturingLambda(Object o) {
+        return o.getClass().getDeclaredFields().length == 0;
+    }
+
+    /* ============================================================================ */
+
+    private static native int registerNatives();
+}