x86_64-nacl-clang++ crash

[Marat Dukhan]

I encountered the following crash in x86_64-nacl-clang++ (both pepper_47 and pepper_canary toolchains):

FAILED: /home/marat/Tools/nacl_sdk/pepper_canary/toolchain/linux_pnacl/bin/x86_64-nacl-clang++ -o /home/marat/NNPACK/build/test/fft-ref.cc.o -c /home/marat/NNPACK/test/fft-ref.cc -MMD -MF /home/marat/NNPACK/build/test/fft-ref.cc.o.d -O3 -g -std=gnu++11 -pthread -I/home/marat/NNPACK/include -I/home/marat/NNPACK/third-party/pthreadpool/include -I/home/marat/NNPACK/test -I/home/marat/NNPACK/third-party/gtest-1.7.0/include

x86_64-nacl-clang++: /mnt/data/b/build/slave/nacl-toolchain/build/native_client/toolchain_build/src/llvm/lib/Target/X86/X86NaClRewritePass.cpp:570: bool (anonymous namespace)::X86NaClRewritePass::ApplyMemorySFI(llvm::MachineBasicBlock &, MachineBasicBlock::iterator): Assertion `!IndexReg.getReg() && "Unexpected index and base register"' failed.

#0 0x7f4c3db7ec48 llvm::sys::PrintStackTrace(llvm::raw_ostream&) (/home/marat/Tools/nacl_sdk/pepper_canary/toolchain/linux_pnacl/bin/../lib/libLLVM-3.7svn.so+0x141fc48)

#1 0x7f4c3db8051b SignalHandler(int) (/home/marat/Tools/nacl_sdk/pepper_canary/toolchain/linux_pnacl/bin/../lib/libLLVM-3.7svn.so+0x142151b)

#2 0x7f4c3c551d10 __restore_rt (/lib/x86_64-linux-gnu/libpthread.so.0+0x10d10)

#3 0x7f4c3b48e267 gsignal /build/buildd/glibc-2.21/signal/../sysdeps/unix/sysv/linux/raise.c:55:0

#4 0x7f4c3b48feca abort /build/buildd/glibc-2.21/stdlib/abort.c:91:0

#5 0x7f4c3b48703d __assert_fail_base /build/buildd/glibc-2.21/assert/assert.c:92:0

#6 0x7f4c3b4870f2 (/lib/x86_64-linux-gnu/libc.so.6+0x2e0f2)

#7 0x7f4c3ddc991b (anonymous namespace)::X86NaClRewritePass::runOnMachineBasicBlock(llvm::MachineBasicBlock&) (/home/marat/Tools/nacl_sdk/pepper_canary/toolchain/linux_pnacl/bin/../lib/libLLVM-3.7svn.so+0x166a91b)

#8 0x7f4c3ddc62db (anonymous namespace)::X86NaClRewritePass::runOnMachineFunction(llvm::MachineFunction&) (/home/marat/Tools/nacl_sdk/pepper_canary/toolchain/linux_pnacl/bin/../lib/libLLVM-3.7svn.so+0x16672db)

#9 0x7f4c3d079c09 llvm::MachineFunctionPass::runOnFunction(llvm::Function&) (/home/marat/Tools/nacl_sdk/pepper_canary/toolchain/linux_pnacl/bin/../lib/libLLVM-3.7svn.so+0x91ac09)

#10 0x7f4c3d2da224 llvm::FPPassManager::runOnFunction(llvm::Function&) (/home/marat/Tools/nacl_sdk/pepper_canary/toolchain/linux_pnacl/bin/../lib/libLLVM-3.7svn.so+0xb7b224)

#11 0x7f4c3d2da45b llvm::FPPassManager::runOnModule(llvm::Module&) (/home/marat/Tools/nacl_sdk/pepper_canary/toolchain/linux_pnacl/bin/../lib/libLLVM-3.7svn.so+0xb7b45b)

#12 0x7f4c3d2da9bc llvm::legacy::PassManagerImpl::run(llvm::Module&) (/home/marat/Tools/nacl_sdk/pepper_canary/toolchain/linux_pnacl/bin/../lib/libLLVM-3.7svn.so+0xb7b9bc)

#13 0x884851 clang::EmitBackendOutput(clang::DiagnosticsEngine&, clang::CodeGenOptions const&, clang::TargetOptions const&, clang::LangOptions const&, llvm::StringRef, llvm::Module*, clang::BackendAction, llvm::raw_pwrite_stream*) (/home/marat/Tools/nacl_sdk/pepper_canary/toolchain/linux_pnacl/bin/x86_64-nacl-clang+++0x884851)

#14 0x8766c7 clang::BackendConsumer::HandleTranslationUnit(clang::ASTContext&) (/home/marat/Tools/nacl_sdk/pepper_canary/toolchain/linux_pnacl/bin/x86_64-nacl-clang+++0x8766c7)

#15 0xac3ee3 clang::ParseAST(clang::Sema&, bool, bool) (/home/marat/Tools/nacl_sdk/pepper_canary/toolchain/linux_pnacl/bin/x86_64-nacl-clang+++0xac3ee3)

#16 0x639bde clang::FrontendAction::Execute() (/home/marat/Tools/nacl_sdk/pepper_canary/toolchain/linux_pnacl/bin/x86_64-nacl-clang+++0x639bde)

#17 0x60d32b clang::CompilerInstance::ExecuteAction(clang::FrontendAction&) (/home/marat/Tools/nacl_sdk/pepper_canary/toolchain/linux_pnacl/bin/x86_64-nacl-clang+++0x60d32b)

#18 0x5f0631 clang::ExecuteCompilerInvocation(clang::CompilerInstance*) (/home/marat/Tools/nacl_sdk/pepper_canary/toolchain/linux_pnacl/bin/x86_64-nacl-clang+++0x5f0631)

#19 0x5e803e cc1_main(llvm::ArrayRef<char const*>, char const*, void*) (/home/marat/Tools/nacl_sdk/pepper_canary/toolchain/linux_pnacl/bin/x86_64-nacl-clang+++0x5e803e)

#20 0x5eebd7 main (/home/marat/Tools/nacl_sdk/pepper_canary/toolchain/linux_pnacl/bin/x86_64-nacl-clang+++0x5eebd7)

#21 0x7f4c3b479a40 __libc_start_main /build/buildd/glibc-2.21/csu/libc-start.c:323:0

#22 0x5e7cf5 _start (/home/marat/Tools/nacl_sdk/pepper_canary/toolchain/linux_pnacl/bin/x86_64-nacl-clang+++0x5e7cf5)

Stack dump:

0. Program arguments: /home/marat/Tools/nacl_sdk/pepper_canary/toolchain/linux_pnacl/bin/x86_64-nacl-clang++ -cc1 -triple x86_64--nacl -S -disable-free -main-file-name fft-ref.cc -mrelocation-model static -mthread-model posix -mdisable-fp-elim -fmath-errno -no-integrated-as -mconstructor-aliases -munwind-tables -fuse-init-array -target-cpu x86-64 -target-linker-version 2.22 -g -dwarf-column-info -coverage-file /home/marat/NNPACK/build/test/fft-ref.cc.o -resource-dir /home/marat/Tools/nacl_sdk/pepper_canary/toolchain/linux_pnacl/bin/../lib/clang/3.7.0 -dependency-file /home/marat/NNPACK/build/test/fft-ref.cc.o.d -MT /home/marat/NNPACK/build/test/fft-ref.cc.o -I /home/marat/NNPACK/include -I /home/marat/NNPACK/third-party/pthreadpool/include -I /home/marat/NNPACK/test -I /home/marat/NNPACK/third-party/gtest-1.7.0/include -internal-isystem /home/marat/Tools/nacl_sdk/pepper_canary/toolchain/linux_pnacl/bin/../x86_64-nacl/include/c++/v1 -internal-isystem /home/marat/Tools/nacl_sdk/pepper_canary/toolchain/linux_pnacl/bin/../lib/clang/3.7.0/include -internal-isystem /home/marat/Tools/nacl_sdk/pepper_canary/toolchain/linux_pnacl/bin/../x86_64-nacl/usr/include -internal-isystem /home/marat/Tools/nacl_sdk/pepper_canary/toolchain/linux_pnacl/bin/../x86_64-nacl/include -O3 -std=gnu++11 -fdeprecated-macro -fno-dwarf-directory-asm -fdebug-compilation-dir /home/marat/NNPACK -ferror-limit 19 -fmessage-length 0 -pthread -mstackrealign -fobjc-runtime=gcc -fcxx-exceptions -fexceptions -fdiagnostics-show-option -vectorize-loops -vectorize-slp -o /tmp/fft-ref-546346.s -x c++ /home/marat/NNPACK/test/fft-ref.cc

1. <eof> parser at end of file

2. Code generation

3. Running pass 'Function Pass Manager' on module '/home/marat/NNPACK/test/fft-ref.cc'.

4. Running pass 'NaCl Rewrites' on function '@_ZN26ForwardAndInverseFFTTester4testIPFvPKfPfES5_EEvT_T0_'

x86_64-nacl-clang++: error: unable to execute command: Aborted (core dumped)

x86_64-nacl-clang++: error: clang frontend command failed due to signal (use -v to see invocation)

clang version 3.7.0 (https://chromium.googlesource.com/a/native_client/pnacl-clang.git cf0dc7f6e6123dfa9b8834b56743315300b34e6c) (https://chromium.googlesource.com/a/native_client/pnacl-llvm.git 335826e8d5b5eff193edf6ac24b81e11f5b2ae08)

Target: x86_64--nacl

Thread model: posix

x86_64-nacl-clang++: note: diagnostic msg: PLEASE submit a bug report to http://llvm.org/bugs/ and include the crash backtrace, preprocessed source, and associated run script.

x86_64-nacl-clang++: note: diagnostic msg:

********************

PLEASE ATTACH THE FOLLOWING FILES TO THE BUG REPORT:

Preprocessed source(s) and associated run script(s) are located at:

x86_64-nacl-clang++: note: diagnostic msg: /tmp/fft-ref-fddb85.cpp

x86_64-nacl-clang++: note: diagnostic msg: /tmp/fft-ref-fddb85.sh

x86_64-nacl-clang++: note: diagnostic msg:

********************

If needed, I can share the diagnostic files privately.

Regards,

Marat

[Marat Dukhan]

Is anybody on the NaCl team looking into the problem? Any chance it will be fixed soon?

Regards,

Marat

[Derek Schuff]

This doesn't ring a bell but if you can share the preprocessed source file that the compiler emits when it asserts, that would be helpful. (If you need to obfuscate it I can tell you how to get an IR file out that would probably work too).

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[Derek Schuff]

I filed https://bugs.chromium.org/p/nativeclient/issues/detail?id=4358 for anyone following along, I'll add updates there.

[Marat Dukhan]

Thank you!

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