Add AOT Feature Flag for Transactional Memory

runtime/compiler/control/CompilationThread.cpp

@@ -1803,6 +1803,7 @@ bool TR::CompilationInfo::shouldRetryCompilation(TR_MethodToBeCompiled *entry, T
             case compilationAotValidateStringCompressionFailure:
             case compilationSymbolValidationManagerFailure:
             case compilationAOTNoSupportForAOTFailure:
+            case compilationAOTValidateTMFailure:
                // switch to JIT for these cases (we don't want to relocate again)
                entry->_doNotUseAotCodeFromSharedCache = true;
                tryCompilingAgain = true;

runtime/compiler/control/rossa.cpp

@@ -197,6 +197,7 @@ char *compilationErrorNames[]={
    "compilationEnforceProfiling", //49
    "compilationSymbolValidationManagerFailure", //50
    "compilationAOTNoSupportForAOTFailure", //51
+   "compilationAOTValidateTMFailure", //52
    "compilationMaxError"
 };
 

runtime/compiler/control/rossa.h

@@ -75,6 +75,7 @@ typedef enum {
    compilationEnforceProfiling                     = 49,
    compilationSymbolValidationManagerFailure       = 50,
    compilationAOTNoSupportForAOTFailure            = 51,
+   compilationAOTValidateTMFailure                 = 52,
    /* please insert new codes before compilationMaxError which is used in jar2jxe to test the error codes range */
    /* If new codes are added then add the corresponding names in compilationErrorNames table in rossa.cpp */
    compilationMaxError /* must be the last one */

runtime/compiler/runtime/J9Runtime.hpp

@@ -170,6 +170,7 @@ typedef struct TR_AOTMethodHeader {
 #define TR_AOTMethodHeader_UsesEnableStringCompressionFolding        0x00000008
 #define TR_AOTMethodHeader_StringCompressionEnabled                  0x00000010
 #define TR_AOTMethodHeader_UsesSymbolValidationManager               0x00000020
+#define TR_AOTMethodHeader_TMDisabled                                0x00000040
 
 
 

runtime/compiler/runtime/MetaData.cpp

@@ -1523,6 +1523,11 @@ createMethodMetaData(
          aotMethodHeaderEntry->flags |= TR_AOTMethodHeader_IsNotCapableOfMethodEnterTracing;
          }
 
+      if (comp->getOption(TR_DisableTM))
+         {
+         aotMethodHeaderEntry->flags |= TR_AOTMethodHeader_TMDisabled;
+         }
+
       // totalAllocated space is in comp object
       TR_ASSERT(comp->getTotalNeededDataCacheSpace() == aotMethodHeaderEntry->compileMethodDataSize, "Size missmatach");
       }

runtime/compiler/runtime/RelocationRuntime.cpp

@@ -240,6 +240,12 @@ TR_RelocationRuntime::prepareRelocateAOTCodeAndData(J9VMThread* vmThread,
       comp->setOption(TR_UseSymbolValidationManager);
       }
 
+   if ((_aotMethodHeaderEntry->flags & TR_AOTMethodHeader_TMDisabled) && !comp->getOption(TR_DisableTM))
+      {
+      setReturnCode(compilationAOTValidateTMFailure);
+      return NULL;
+      }
+
    _exceptionTableCacheEntry = (J9JITDataCacheHeader *)((uint8_t *)cacheEntry + _aotMethodHeaderEntry->offsetToExceptionTable);
 
    if (_exceptionTableCacheEntry->type == J9_JIT_DCE_EXCEPTION_INFO)
@@ -936,6 +942,8 @@ TR_SharedCacheRelocationRuntime::checkAOTHeaderFlags(TR_FrontEnd *fe, TR_AOTHead
       defaultMessage = generateError("AOT header validation failed: Concurrent Scavenge feature mismatch.");
    if ((featureFlags & TR_FeatureFlag_SoftwareReadBarrier) != (hdrInCache->featureFlags & TR_FeatureFlag_SoftwareReadBarrier))
       defaultMessage = generateError("AOT header validation failed: Software Read Barrier feature mismatch.");
+   if ((featureFlags & TR_FeatureFlag_UsesTM) != (hdrInCache->featureFlags & TR_FeatureFlag_UsesTM))
+      defaultMessage = generateError("AOT header validation failed: TM feature mismatch.");
 
    if ((featureFlags & TR_FeatureFlag_SanityCheckEnd) != (hdrInCache->featureFlags & TR_FeatureFlag_SanityCheckEnd))
       defaultMessage = generateError("AOT header validation failed: Trailing sanity bit mismatch.");
@@ -1283,6 +1291,16 @@ TR_SharedCacheRelocationRuntime::generateFeatureFlags(TR_FrontEnd *fe)
    if (fej9->isAsyncCompilation())
       featureFlags |= TR_FeatureFlag_AsyncCompilation;
 
+
+   if (!TR::Options::getCmdLineOptions()->getOption(TR_DisableTM) &&
+       !TR::Options::getAOTCmdLineOptions()->getOption(TR_DisableTM))
+      {
+      if (TR::Compiler->target.cpu.supportsTransactionalMemoryInstructions())
+         {
+         featureFlags |= TR_FeatureFlag_UsesTM;
+         }
+      }
+
    return featureFlags;
    }
 

runtime/compiler/runtime/RelocationRuntime.hpp

@@ -80,6 +80,7 @@ typedef enum TR_AOTFeatureFlags
    TR_FeatureFlag_AsyncCompilation              = 0x00000400,     //async compilation - switch to interpreter code NOT generated
    TR_FeatureFlag_ConcurrentScavenge            = 0x00000800,
    TR_FeatureFlag_SoftwareReadBarrier           = 0x00001000,
+   TR_FeatureFlag_UsesTM                        = 0x00002000,
    TR_FeatureFlag_SanityCheckEnd                = 0x80000000
    } TR_AOTFeatureFlags;