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bootstrapping: Segmentation fault in clang while bootstrapping LLVM 18 #91899

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Mishura4 opened this issue May 12, 2024 · 3 comments
Open

bootstrapping: Segmentation fault in clang while bootstrapping LLVM 18 #91899

Mishura4 opened this issue May 12, 2024 · 3 comments
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clang Clang issues not falling into any other category crash Prefer [crash-on-valid] or [crash-on-invalid]

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@Mishura4
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Mishura4 commented May 12, 2024 •
edited

Commit: 617a15a (grafted, HEAD, tag: llvmorg-18.1.5)
OS: Ubuntu 24.04

Error:

[ 56%] Building LLVM bitcode Workshare.cpp-sm_90.bc
PLEASE submit a bug report to https://github.com/llvm/llvm-project/issues/ and include the crash backtrace, preprocessed source, and associated run script.
Stack dump:
0.      Program arguments: /home/miuna/dev/llvmorg-18.1.5/build/bin/clang-18 -cc1 -triple x86_64-unknown-linux-gnu -emit-llvm-bc -emit-llvm-uselists -disable-free -clear-ast-before-backend -disable-llvm-verifier -discard-value-names -main-file-name Workshare.cpp -mrelocation-model pic -pic-level 2 -pic-is-pie -mframe-pointer=none -fmath-errno -ffp-contract=on -fno-rounding-math -mconstructor-aliases -funwind-tables=2 -target-cpu x86-64 -tune-cpu generic -debugger-tuning=gdb -fdebug-compilation-dir=/home/miuna/dev/llvmorg-18.1.5/build/projects/openmp/libomptarget/DeviceRTL -fcoverage-compilation-dir=/home/miuna/dev/llvmorg-18.1.5/build/projects/openmp/libomptarget/DeviceRTL -nostdsysteminc -nobuiltininc -resource-dir /home/miuna/dev/llvmorg-18.1.5/build/lib/clang/18 -dependency-file Workshare.cpp-sm_90.bc.d -MT Workshare.cpp-sm_90.bc -sys-header-deps -D SHARED_SCRATCHPAD_SIZE=512 -D OMPTARGET_DEVICE_RUNTIME -I /home/miuna/dev/llvmorg-18.1.5/openmp/libomptarget/DeviceRTL/include -I /home/miuna/dev/llvmorg-18.1.5/openmp/libomptarget/DeviceRTL/../include -I /home/miuna/dev/llvmorg-18.1.5/llvm/include -I /home/miuna/dev/llvmorg-18.1.5/build/include -O3 -Wno-unknown-cuda-version -std=c++17 -fdeprecated-macro -ferror-limit 19 -fvisibility=hidden -fopenmp -fopenmp-cuda-mode -nogpulib -fgnuc-version=4.2.1 -fskip-odr-check-in-gmf -fcxx-exceptions -fexceptions -fcolor-diagnostics -vectorize-loops -vectorize-slp -mllvm -openmp-opt-disable -mllvm -vectorize-slp=false -disable-llvm-passes -fopenmp-targets=nvptx64-nvidia-cuda -faddrsig -D__GCC_HAVE_DWARF2_CFI_ASM=1 -o /tmp/Workshare-sm_90-4bb41b.bc -x c++ /home/miuna/dev/llvmorg-18.1.5/openmp/libomptarget/DeviceRTL/src/Workshare.cpp
 #0 0x00005a60cc4210f8 llvm::sys::PrintStackTrace(llvm::raw_ostream&, int) (/home/miuna/dev/llvmorg-18.1.5/build/bin/clang-18+0x2f3f0f8)
 #1 0x00005a60cc41e74e llvm::sys::RunSignalHandlers() (/home/miuna/dev/llvmorg-18.1.5/build/bin/clang-18+0x2f3c74e)
 #2 0x00005a60cc421bd8 SignalHandler(int) Signals.cpp:0:0
 #3 0x00007f9579a45320 (/lib/x86_64-linux-gnu/libc.so.6+0x45320)
 #4 0x00005a60cd10b6ae ParseTargetArgs(clang::TargetOptions&, llvm::opt::ArgList&, clang::DiagnosticsEngine&) CompilerInvocation.cpp:0:0
 #5 0x00005a60cd0f5403 clang::CompilerInvocation::CreateFromArgsImpl(clang::CompilerInvocation&, llvm::ArrayRef<char const*>, clang::DiagnosticsEngine&, char const*) (/home/miuna/dev/llvmorg-18.1.5/build/bin/clang-18+0x3c13403)
 #6 0x00005a60cb20feb1 cc1_main(llvm::ArrayRef<char const*>, char const*, void*) (/home/miuna/dev/llvmorg-18.1.5/build/bin/clang-18+0x1d2deb1)
 #7 0x00005a60cb20de2c ExecuteCC1Tool(llvm::SmallVectorImpl<char const*>&, llvm::ToolContext const&) driver.cpp:0:0
 #8 0x00005a60cb20c624 clang_main(int, char**, llvm::ToolContext const&) (/home/miuna/dev/llvmorg-18.1.5/build/bin/clang-18+0x1d2a624)
 #9 0x00005a60cb21f18a main (/home/miuna/dev/llvmorg-18.1.5/build/bin/clang-18+0x1d3d18a)
#10 0x00007f9579a2a1ca (/lib/x86_64-linux-gnu/libc.so.6+0x2a1ca)
#11 0x00007f9579a2a28b __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x2a28b)
#12 0x00005a60cb1fe4a5 _start (/home/miuna/dev/llvmorg-18.1.5/build/bin/clang-18+0x1d1c4a5)
clang-18: error: unable to execute command: Segmentation fault (core dumped)
clang-18: error: clang frontend command failed due to signal (use -v to see invocation)
clang version 18.1.5 (https://github.com/llvm/llvm-project.git 617a15a9eac96088ae5e9134248d8236e34b91b1)
Target: x86_64-unknown-linux-gnu
Thread model: posix
InstalledDir: /home/miuna/dev/llvmorg-18.1.5/build/projects/openmp/libomptarget/DeviceRTL/../../../../bin
clang-18: error: unable to execute command: Segmentation fault (core dumped)
clang-18: note: diagnostic msg: Error generating preprocessed source(s).
gmake[2]: *** [projects/openmp/libomptarget/DeviceRTL/CMakeFiles/omptarget.devicertl.dir/build.make:4585: projects/openmp/libomptarget/DeviceRTL/Workshare.cpp-sm_90.bc] Error 1
gmake[1]: *** [CMakeFiles/Makefile2:118238: projects/openmp/libomptarget/DeviceRTL/CMakeFiles/omptarget.devicertl.dir/all] Error 2
gmake: *** [Makefile:156: all] Error 2

No preprocessed sources because clang-18: note: diagnostic msg: Error generating preprocessed source(s).

Build script:

#!/bin/sh

export CXX=clang++-17
export CC=clang-17

cmake llvm/ -B build \
      -DLLVM_ENABLE_PROJECTS="clang;clang-tools-extra;compiler-rt;libc;libclc;lld;lldb;openmp;polly" \
      -DLLVM_ENABLE_RUNTIMES='all' \
      -DLLVM_TARGETS_TO_BUILD=Native \
      -DCLANG_ENABLE_BOOTSTRAP=ON \
      -DLLVM_ENABLE_LTO='Thin' \
      -DLLVM_USE_LINKER='lld' \
      -DCMAKE_BUILD_TYPE=Release \
      -DCLANG_DEFAULT_CXX_STDLIB=libc++ \
      -DCLANG_DEFAULT_RTLIB=compiler-rt \
      -DLIBCXX_USE_COMPILER_RT=YES \
      -DLIBCXXABI_USE_COMPILER_RT=YES \
      -DLIBCXXABI_USE_LLVM_UNWINDER=YES \
      -DBOOTSTRAP_CMAKE_BUILD_TYPE=Release \
      -DBOOTSTRAP_CLANG_DEFAULT_CXX_STDLIB=libc++ \
      -DBOOTSTRAP_CLANG_DEFAULT_RTLIB=compiler-rt \
      -DBOOTSTRAP_LIBCXX_USE_COMPILER_RT=YES \
      -DBOOTSTRAP_LIBCXXABI_USE_COMPILER_RT=YES \
      -DBOOTSTRAP_LIBCXXABI_USE_LLVM_UNWINDER=YES \
      -DBOOTSTRAP_LLVM_USE_LINKER=lld \
      -DBOOTSTRAP_LLVM_ENABLE_LTO='Thin' \
      -DLIBUNWIND_USE_COMPILER_RT=Yes \
      -DBOOTSTRAP_LIBUNWIND_USE_COMPILER_RT=Yes

cmake --build build --config Release --parallel 4

(and yes i've tried without --parallel, same issue, though I haven't tried a full rebuild without it)

Bootstrapped with:

$ clang++-17 -v
Ubuntu clang version 17.0.6 (9ubuntu1)
Target: x86_64-pc-linux-gnu
Thread model: posix
InstalledDir: /usr/bin
Found candidate GCC installation: /usr/bin/../lib/gcc/x86_64-linux-gnu/13
Found candidate GCC installation: /usr/bin/../lib/gcc/x86_64-linux-gnu/14
Selected GCC installation: /usr/bin/../lib/gcc/x86_64-linux-gnu/14
Candidate multilib: .;@m64
Selected multilib: .;@m64

Machine runs Intel(R) Xeon(R) CPU E5-1620 v2 @ 3.70GHz with 32Gb RAM. clang-17 was installed using apt-get.
@github-actions github-actions bot added the clang Clang issues not falling into any other category label May 12, 2024
@firewave firewave added the crash Prefer [crash-on-valid] or [crash-on-invalid] label May 12, 2024
@Mishura4
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Mishura4 commented May 12, 2024 •
edited

I noticed I was using lld 18 to link clang built with clang17. I'll try again without -DBOOTSTRAP_LLVM_USE_LINKER=lld and -DBOOTSTRAP_LLVM_ENABLE_LTO='Thin', which should use GNU ld 2.42, and update with results

@Mishura4
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That did not fix it

@Mishura4
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Mishura4 commented May 13, 2024 •
edited

Tried this instead:

#!/bin/sh

export CXX=clang++-17
export CC=clang-17

cmake llvm/ -B build \
      -DLLVM_ENABLE_PROJECTS="clang;clang-tools-extra;lld;lldb;polly" \
      -DLLVM_ENABLE_RUNTIMES='compiler-rt;libc;libcxx;libcxxabi;libunwind;openmp' \
      -DLLVM_TARGETS_TO_BUILD=Native \
      -DLLVM_ENABLE_LTO='Thin' \
      -DLLVM_ENABLE_LLD=On \
      -DLLVM_ENABLE_LIBCXX=On \
      -DLLVM_PARALLEL_COMPILE_JOBS=$(nproc) \
      -DLLVM_PARALLEL_LINK_JOBS=4 \
      -DCMAKE_BUILD_TYPE=Release \
      -DCLANG_DEFAULT_CXX_STDLIB=libc++ \
      -DCLANG_DEFAULT_RTLIB=compiler-rt \
      -DCLANG_DEFAULT_LINKER=lld \
      -DLIBCXX_USE_COMPILER_RT=YES \
      -DLIBCXXABI_USE_COMPILER_RT=YES \
      -DLIBCXXABI_USE_LLVM_UNWINDER=YES \
      -DCLANG_ENABLE_BOOTSTRAP=ON \
      -DBOOTSTRAP_CMAKE_BUILD_TYPE=Release \
      -DBOOTSTRAP_CLANG_DEFAULT_CXX_STDLIB=libc++ \
      -DBOOTSTRAP_CLANG_DEFAULT_RTLIB=compiler-rt \
      -DBOOTSTRAP_CLANG_DEFAULT_LINKER=lld \
      -DBOOTSTRAP_LIBCXX_USE_COMPILER_RT=YES \
      -DBOOTSTRAP_LIBCXXABI_USE_COMPILER_RT=YES \
      -DBOOTSTRAP_LIBCXXABI_USE_LLVM_UNWINDER=YES \
      -DLIBUNWIND_USE_COMPILER_RT=Yes \
      -DBOOTSTRAP_LIBUNWIND_USE_COMPILER_RT=Yes \
      -G Ninja

ninja -C build stage2

Got another crash also missing preprocessed sources: CMakeError.log

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