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Segfault in llvm::DIE::getUnitDie #50796

Open jprotze opened 3 years ago

jprotze commented 3 years ago
Bugzilla Link 51454
Version 12.0
OS Linux
Attachments Preprocessed source
CC @aaronpuchert,@kamleshbhalui

Extended Description

The segfault occurs randomly during compilation. When executing a benchmark with 177 kernels, the error occurs 1-2 times on my system.

release-12.0.1 source is compiled on ubuntu 18.04 using gcc-10 and these flags:

cmake -G Ninja -DCMAKE_BUILD_TYPE=Release -DLLVM_ENABLE_PROJECTS='clang;clang-tools-extra;compiler-rt;openmp'

I attach preprocessed source and script, although I cannot reproduce the segfault with the script.

  1. Program arguments: /llvm-12.0.1/install_tree/bin/clang-12 -cc1 -triple x86_64-unknown-linux-gnu -emit-obj -mrelax-all --mrelax-relocations -disable-free -disable-llvm-verifier -discard-value-names -main-file-name DRB112-linear-orig-no.c -mrelocation-model static -mframe-pointer=all -fmath-errno -fno-rounding-math -mconstructor-aliases -munwind-tables -target-cpu x86-64 -tune-cpu generic -fno-split-dwarf-inlining -debug-info-kind=limited -dwarf-version=4 -debugger-tuning=gdb -fprofile-update=atomic -resource-dir /llvm-12.0.1/install_tree/lib/clang/12.0.1 -internal-isystem /usr/local/include -internal-isystem /llvm-12.0.1/install_tree/lib/clang/12.0.1/include -internal-externc-isystem /usr/include/x86_64-linux-gnu -internal-externc-isystem /include -internal-externc-isystem /usr/include -fdebug-compilation-dir /home/drb/dataracebench -ferror-limit 19 -fopenmp -fopenmp-cuda-parallel-target-regions -fsanitize=thread -fgnuc-version=4.2.1 -fcolor-diagnostics -faddrsig -o /tmp/DRB112-linear-orig-no-9f0161.o -x c micro-benchmarks/DRB112-linear-orig-no.c
  2. parser at end of file
  3. Code generation

    ​0 0x0000558590b8cc5d llvm::sys::PrintStackTrace(llvm::raw_ostream&, int) (/llvm-12.0.1/install_tree/bin/clang-12+0x3010c5d)

    ​1 0x0000558590b8a964 llvm::sys::RunSignalHandlers() (/llvm-12.0.1/install_tree/bin/clang-12+0x300e964)

    ​2 0x0000558590b8aadb SignalHandler(int) (/llvm-12.0.1/install_tree/bin/clang-12+0x300eadb)

    ​3 0x00001481b0b18980 __restore_rt (/lib/x86_64-linux-gnu/libpthread.so.0+0x12980)

    ​4 0x0000558591746400 llvm::DIE::getUnitDie() const (/llvm-12.0.1/install_tree/bin/clang-12+0x3bca400)

    ​5 0x000055859175168c llvm::DwarfDebug::finishEntityDefinitions() (/llvm-12.0.1/install_tree/bin/clang-12+0x3bd568c)

    ​6 0x00005585917699d5 llvm::DwarfDebug::finalizeModuleInfo() (/llvm-12.0.1/install_tree/bin/clang-12+0x3bed9d5)

    ​7 0x000055859176cb18 llvm::DwarfDebug::endModule() (/llvm-12.0.1/install_tree/bin/clang-12+0x3bf0b18)

    ​8 0x0000558591738b89 llvm::AsmPrinter::doFinalization(llvm::Module&) (/llvm-12.0.1/install_tree/bin/clang-12+0x3bbcb89)

    ​9 0x000055859036848d llvm::FPPassManager::doFinalization(llvm::Module&) (.localalias) (/llvm-12.0.1/install_tree/bin/clang-12+0x27ec48d)

    ​10 0x00005585903742b0 llvm::legacy::PassManagerImpl::run(llvm::Module&) (/llvm-12.0.1/install_tree/bin/clang-12+0x27f82b0)

    ​11 0x0000558590e46e9f clang::EmitBackendOutput(clang::DiagnosticsEngine&, clang::HeaderSearchOptions const&, clang::CodeGenOptions const&, clang::TargetOptions const&, clang::LangOptions const&, llvm::DataLayout const&, llvm::Module*, clang::BackendAction, std::unique_ptr<llvm::raw_pwrite_stream, std::default_delete >) (/llvm-12.0.1/install_tree/bin/clang-12+0x32cae9f)

    ​12 0x0000558591ad27e4 clang::BackendConsumer::HandleTranslationUnit(clang::ASTContext&) (/llvm-12.0.1/install_tree/bin/clang-12+0x3f567e4)

    ​13 0x00005585924bbde9 clang::ParseAST(clang::Sema&, bool, bool) (/llvm-12.0.1/install_tree/bin/clang-12+0x493fde9)

    ​14 0x0000558591479e29 clang::FrontendAction::Execute() (/llvm-12.0.1/install_tree/bin/clang-12+0x38fde29)

    ​15 0x000055859141a68b clang::CompilerInstance::ExecuteAction(clang::FrontendAction&) (/llvm-12.0.1/install_tree/bin/clang-12+0x389e68b)

    ​16 0x000055859152b8b8 clang::ExecuteCompilerInvocation(clang::CompilerInstance*) (/llvm-12.0.1/install_tree/bin/clang-12+0x39af8b8)

    ​17 0x000055858ea1eb04 cc1_main(llvm::ArrayRef<char const>, char const, void*) (/llvm-12.0.1/install_tree/bin/clang-12+0xea2b04)

    ​18 0x000055858ea1c257 ExecuteCC1Tool(llvm::SmallVectorImpl<char const*>&) (/llvm-12.0.1/install_tree/bin/clang-12+0xea0257)

    ​19 0x000055858e96a24c main (/llvm-12.0.1/install_tree/bin/clang-12+0xdee24c)

    ​20 0x00001481afb6fbf7 __libc_start_main /build/glibc-S9d2JN/glibc-2.27/csu/../csu/libc-start.c:344:0

    ​21 0x000055858ea1bbfa _start (/llvm-12.0.1/install_tree/bin/clang-12+0xe9fbfa)

    clang-12: error: unable to execute command: Segmentation fault (core dumped) clang-12: error: clang frontend command failed due to signal (use -v to see invocation) clang version 12.0.1 Target: x86_64-unknown-linux-gnu Thread model: posix InstalledDir: /usr/bin clang-12: note: diagnostic msg:

aaronpuchert commented 3 years ago

Likely a duplicate of bug llvm/llvm-project#49955 .