obfuscator-llvm 3.5 crashes when building a specific m file #14
Comments
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Hi, I can't reproduce your problem... I assume, seeing your backtrace, that you are trying to compile a program for IOS? I tried to compile a IOS application within Xcode with Obfuscator and It worked fine. Can you give me more information please? Cheers |
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I wrote a demo to find out the procedure to reproduce the problem. The demo contains a m file with a bunch of functions like this: char* getCurrentDeviceNameBridge() The compiler is set to "Obfuscator 3.5", which was installed by following the offical OLLVM install instruction. Also i add some flags to the "Other C Flags" section in build setting: "-mllvm, "-sub", "-mllvm", "-bcf", "-mllvm", "-fla", "-miphoneos-version-min=6.0" The demo's building process crashed sometimes, with the same kind of backtrace i provided yesterday. But everything works fine when i switch the compiler back to Obfuscator 3.4. |
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I can provide the files follows or the Demo Project if necessary: clang-3.5: note: diagnostic msg: /var/folders/18/xxx/T/CrashedCode-871862.m |
MasterBeta
changed the title
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By removing code function by function, i've found the function caused the crash: @interface DummyLocker : NSObject
@end
@implementation DummyLocker
@end
int functionA(signed long long v) {
@synchronized([DummyLocker class]){
//do someting
return 1;
}
return 0;
}
signed long long functionB(signed long long v){
//do something
return v;
}
signed long long functionC(signed long long v){
@synchronized([DummyLocker class]){
return functionB(v);
}
}If i remove the codes above or replace @synchronied with NSLock, the crash doesn't reproduce anymore. Hope this helps :) |
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Thx for details... Unfortunately I won't be able to check that until next friday. |
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Other than modifying my code, both adding "attribute((__annotate(("nobcf"))))" flag and removing "-bcf" can make the crash disappear. Hope this helps :) |
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Working on it... I'll probably have a fix by monday! |
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Sorry, I didn't had the time to work properly on it... A fix will come soon! |
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Just pushed some changes... Can you try to update your local repo and tell me if it works? I created a new IOS project in Xcode, pasted you code in the main.m file and added a simple loop with a NSLog inside where you put the "// Do something" comments. I tried the code, with all flags and once with only bcf (both time with -mllvm -bogus-cf=100, means every basic block is obfuscated) and everything went fine (compil+exec). Thx for your feedback |
os: OS X 10.10.1 (14B17)
Xcode：5.1.1
bfuscator-llvm version: commit 3bc5428, branch llvm_3.5
BackTrace:
0 clang-3.5 0x0000000104809bd8 llvm::sys::PrintStackTrace(sFILE) + 40
1 clang-3.5 0x000000010480a0b4 SignalHandler(int) + 452
2 libsystem_platform.dylib 0x00007fff8d861f1a sigtramp + 26
3 libsystem_platform.dylib 0x00007faa0854a2a0 sigtramp + 2060354464
4 clang-3.5 0x0000000104556c2f llvm::FPPassManager::doInitialization(llvm::Module&) + 63
5 clang-3.5 0x0000000104556fa0 llvm::legacy::PassManagerImpl::run(llvm::Module&) + 736
6 clang-3.5 0x0000000104be743e clang::EmitBackendOutput(clang::DiagnosticsEngine&, clang::CodeGenOptions const&, clang::TargetOptions const&, clang::LangOptions const&, llvm::StringRef, llvm::Module, clang::BackendAction, llvm::raw_ostream) + 6318
7 clang-3.5 0x0000000104cfdbfb clang::BackendConsumer::HandleTranslationUnit(clang::ASTContext&) + 523
8 clang-3.5 0x0000000104fd86f4 clang::ParseAST(clang::Sema&, bool, bool) + 468
9 clang-3.5 0x0000000104cfc677 clang::CodeGenAction::ExecuteAction() + 87
10 clang-3.5 0x00000001049e773e clang::FrontendAction::Execute() + 62
11 clang-3.5 0x00000001049bb5c3 clang::CompilerInstance::ExecuteAction(clang::FrontendAction&) + 867
12 clang-3.5 0x0000000104a1d0f2 clang::ExecuteCompilerInvocation(clang::CompilerInstance) + 4354
13 clang-3.5 0x0000000103c91abc cc1_main(char const**, char const**, char const_, void_) + 1036
14 clang-3.5 0x0000000103c8e7b8 main + 1128
15 libdyld.dylib 0x00007fff927ac5c9 start + 1
Stack dump:
0. Program arguments: /Users/SomeUser/llvm_obfuscator/build/bin/clang-3.5 -cc1 -triple thumbv7s-apple-ios4.3.0 -emit-obj -disable-free -disable-llvm-verifier -main-file-name SomeFile.m -mrelocation-model pic -pic-level 2 -mdisable-fp-elim -masm-verbose -target-cpu swift -target-feature +soft-float-abi -target-abi apcs-gnu -mfloat-abi soft -dwarf-column-info -coverage-file /Users/SomeUser/Documents/SomeSDK/target/ios/sdk/Build/Intermediates/SomeSDK.build/Release-iphoneos/SomeSDK.build/Objects-normal/armv7s/SomeFile.o -resource-dir /Users/SomeUser/llvm_obfuscator/build/bin/../lib/clang/3.5.0 -isysroot /Applications/Xcode-5.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS7.1.sdk -iquote /Users/SomeUser/Documents/SomeSDK/target/ios/sdk/Build/Intermediates/SomeSDK.build/Release-iphoneos/SomeSDK.build/SomeSDK-generated-files.hmap -iquote /Users/SomeUser/Documents/SomeSDK/target/ios/sdk/Build/Intermediates/SomeSDK.build/Release-iphoneos/SomeSDK.build/SomeSDK-project-headers.hmap -include-pch /Users/SomeUser/Documents/SomeSDK/target/ios/sdk/Build/Intermediates/PrecompiledHeaders/SomeSDK-Prefix-cjjuroblszylmgbipghgksrtnqty/SomeSDK-Prefix.pch.pch -I /Users/SomeUser/Documents/SomeSDK/target/ios/sdk/Build/Intermediates/SomeSDK.build/Release-iphoneos/SomeSDK.build/SomeSDK-own-target-headers.hmap -I /Users/SomeUser/Documents/SomeSDK/target/ios/sdk/Build/Intermediates/SomeSDK.build/Release-iphoneos/SomeSDK.build/SomeSDK-all-target-headers.hmap -I /Users/SomeUser/Documents/SomeSDK/target/ios/sdk/Build/Products/Release-iphoneos/include -I /Applications/Xcode-5.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/include -I /Users/SomeUser/Documents/SomeSDK/target/ios/sdk/Build/Intermediates/SomeSDK.build/Release-iphoneos/SomeSDK.build/DerivedSources/armv7s -I /Users/SomeUser/Documents/SomeSDK/target/ios/sdk/Build/Intermediates/SomeSDK.build/Release-iphoneos/SomeSDK.build/DerivedSources -F/Users/SomeUser/Documents/SomeSDK/target/ios/sdk/Build/Products/Release-iphoneos -Os -Wno-trigraphs -Wno-missing-field-initializers -Wno-missing-prototypes -Wno-implicit-atomic-properties -Wno-receiver-is-weak -Wno-arc-repeated-use-of-weak -Wduplicate-method-match -Wno-missing-braces -Wparentheses -Wswitch -Wno-unused-function -Wno-unused-label -Wno-unused-parameter -Wunused-variable -Wunused-value -Wempty-body -Wuninitialized -Wno-unknown-pragmas -Wno-shadow -Wno-four-char-constants -Wno-conversion -Wconstant-conversion -Wint-conversion -Wno-bool-conversion -Wenum-conversion -Wno-shorten-64-to-32 -Wpointer-sign -Wno-newline-eof -Wno-selector -Wno-strict-selector-match -Wno-undeclared-selector -Wno-deprecated-implementations -Wprotocol -Wdeprecated-declarations -Wno-sign-conversion -std=gnu99 -fdebug-compilation-dir /Users/SomeUser/Documents/SomeSDK/source/SDK/iOS/SomeSDK -ferror-limit 19 -fmacro-backtrace-limit 0 -fmessage-length 0 -stack-protector 1 -mstackrealign -fblocks -fobjc-runtime=ios-4.3.0 -fencode-extended-block-signature -fobjc-exceptions -fexceptions -fsjlj-exceptions -fpascal-strings -fdiagnostics-show-option -fdiagnostics-show-note-include-stack -vectorize-loops -vectorize-slp -mllvm -sub -mllvm -bcf -mllvm -fla -o /Users/SomeUser/Documents/SomeSDK/target/ios/sdk/Build/Intermediates/SomeSDK.build/Release-iphoneos/SomeSDK.build/Objects-normal/armv7s/SomeFile.o -x objective-c /Users/SomeUser/Documents/SomeSDK/source/Adapter/iOS/CMethodBridge/SomeFile.m
clang-3.5: error: unable to execute command: Segmentation fault: 11
clang-3.5: error: clang frontend command failed due to signal (use -v to see invocation)
Obfuscator- clang version 3.5.0 (tags/RELEASE_350/final) (based on LLVM 3.5.0svn)
Target: arm-apple-darwin14.0.0
Thread model: posix
Description: obfucator-llvm crashes every time when building SomeFile.m. C and OC code are mixed it SomFile.m.
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