On 2019/07/30 21:13, Jörg Knobloch wrote:
On 30 Jul 2019 13:50, ISHIKAWA,chiaki wrote:
What is the version of clang used on tryserver?
The same as on the local machine? For Windows I get:
$ ../.mozbuild/clang/bin/clang --version
clang version 8.0.0 (tags/RELEASE_800/final 356365)
Target: x86_64-pc-windows-msvc
Thread model: posix
InstalledDir: c:\mozilla-source\.mozbuild\clang\bin
I'm running debug builds and the compiler crashes every once in a
while, but very rarely lately. Restarting the build fixes the problem.
Reporting the problem at LLVM didn't help in this case, see:
https://bugs.llvm.org/show_bug.cgi?id=39848
Jörg.
I see. Your problem was a random crash, that is hard to crack.
The same 8.0.0 version, but my local clang-8 is run under linux.
The difference between your problem and mine is that my problem is a
constant crash due to an internal error caught with stack dump (hooray!).
Hopefullly the stack dump and the detailed message from the compiler itself will help the developer
developer to home in the bugs.
At the end, I am attaching the short text that I included to the mail
that I sent to request to have an account on llvm.org's bugzilla.
Like I said, this happens all the time and so is a logical defect somewhere.
But then you use clang-8.0.0. The same version which I think I have
under linux.
I am clueless then what to do to compile my code using clang on my local
PC. Hmm...
Ok there was a mention of increasing the main thread stack size or
whatever. Maybe I should try it...
Chiaki
Stack dump:
0. Program arguments: /home/ishikawa/.mozbuild/clang/bin/clang-8 -cc1
-triple x86_64-unknown-linux-gnu -emit-obj -disable-free
-disable-llvm-verifier -discard-value-names -main-file-name line64.c
-mrelocation-model pic -pic-level 2 -mthread-model posix
-mdisable-fp-elim -relaxed-aliasing -masm-verbose -mconstructor-aliases
-munwind-tables -fuse-init-array -target-cpu x86-64 -dwarf-column-info
-enable-split-dwarf -debug-info-kind=limited -dwarf-version=4
-debugger-tuning=gdb -ggnu-pubnames -split-dwarf-file line64.dwo
-momit-leaf-frame-pointer -v -ffunction-sections -fdata-sections
-coverage-notes-file
/KERNEL-SRC/moz-obj-dir/objdir-tb3/comm/ldap/c-sdk/libraries/libldif/line64.gcno
-resource-dir /home/ishikawa/.mozbuild/clang/lib/clang/8.0.0 -include
/KERNEL-SRC/moz-obj-dir/objdir-tb3/mozilla-config.h -D DEBUG=1 -D
LINUX=1 -D LINUX2_0 -D linux=1 -D _PR_PTHREADS -D NET_SSL -D NS_DOMESTIC
-D LDAP_DEBUG -D USE_WAITPID -D NEEDPROTOS -I
/NREF-COMM-CENTRAL/mozilla/comm/ldap/c-sdk/libraries/libldif -I
/KERNEL-SRC/moz-obj-dir/objdir-tb3/comm/ldap/c-sdk/libraries/libldif -I
/NREF-COMM-CENTRAL/mozilla/comm/ldap/c-sdk/include -I
/KERNEL-SRC/moz-obj-dir/objdir-tb3/dist/include -I
/KERNEL-SRC/moz-obj-dir/objdir-tb3/dist/include/nspr -I
/KERNEL-SRC/moz-obj-dir/objdir-tb3/dist/include/nss -D MOZILLA_CLIENT -U
_FORTIFY_SOURCE -D _FORTIFY_SOURCE=2 -D fdatasync=fdatasync -D
DEBUG_4GB_CHECK -D USEHELGRIND=1 -D DEBUG -U _FORTIFY_SOURCE -D
_FORTIFY_SOURCE=2 -internal-isystem /usr/local/include -internal-isystem
/home/ishikawa/.mozbuild/clang/lib/clang/8.0.0/include
-internal-externc-isystem /usr/include/x86_64-linux-gnu
-internal-externc-isystem /include -internal-externc-isystem
/usr/include -Og -Werror=sign-compare -Werror=unused-result
-Werror=unused-variable -Werror=format -Wall -Wbitfield-enum-conversion
-Wempty-body -Wignored-qualifiers -Wpointer-arith
-Wshadow-field-in-constructor-modified -Wsign-compare -Wtype-limits
-Wunreachable-code -Wunreachable-code-return -Wclass-varargs
-Wfloat-overflow-conversion -Wfloat-zero-conversion -Wloop-analysis
-Wstring-conversion -Wtautological-overlap-compare
-Wtautological-unsigned-enum-zero-compare
-Wtautological-unsigned-zero-compare -Wno-error=deprecated-declarations
-Wno-error=array-bounds -Wno-error=backend-plugin
-Wno-error=return-std-move -Wno-error=atomic-alignment -Wformat
-Wformat-security -Wno-gnu-zero-variadic-macro-arguments -std=gnu99
-fdebug-compilation-dir
/KERNEL-SRC/moz-obj-dir/objdir-tb3/comm/ldap/c-sdk/libraries/libldif
-ferror-limit 19 -fmessage-length 0 -stack-protector 2
-fno-builtin-strlen -fobjc-runtime=gcc -fdiagnostics-show-option
-fcolor-diagnostics -o line64.o -x c
/NREF-COMM-CENTRAL/mozilla/comm/ldap/c-sdk/libraries/libldif/line64.c
-faddrsig
1. <eof> parser at end of file
2. Per-module optimization passes
3. Running pass 'Function Pass Manager' on module
'/NREF-COMM-CENTRAL/mozilla/comm/ldap/c-sdk/libraries/libldif/line64.c'.
4. Running pass 'Combine redundant instructions' on function
'@ldif_base64_decode'
#0 0x00007f9ac1292fe4 PrintStackTraceSignalHandler(void*)
(/home/ishikawa/.mozbuild/clang/bin/../lib/libLLVM-8.so+0x62cfe4)
#1 0x00007f9ac1290f0e llvm::sys::RunSignalHandlers()
(/home/ishikawa/.mozbuild/clang/bin/../lib/libLLVM-8.so+0x62af0e)
#2 0x00007f9ac1293298 SignalHandler(int)
(/home/ishikawa/.mozbuild/clang/bin/../lib/libLLVM-8.so+0x62d298)
#3 0x00007f9ac37ac730 __restore_rt
(/lib/x86_64-linux-gnu/libpthread.so.0+0x12730)
#4 0x00007f9ac12e7244
llvm::GetElementPtrInst::getGEPReturnType(llvm::Type*, llvm::Value*,
llvm::ArrayRef<llvm::Value*>)
(/home/ishikawa/.mozbuild/clang/bin/../lib/libLLVM-8.so+0x681244)
#5 0x00007f9ac1300e0c llvm::GetElementPtrInst::Create(llvm::Type*,
llvm::Value*, llvm::ArrayRef<llvm::Value*>, llvm::Twine const&,
llvm::Instruction*)
(/home/ishikawa/.mozbuild/clang/bin/../lib/libLLVM-8.so+0x69ae0c)
#6 0x00007f9ac1aa9f75
llvm::LibCallSimplifier::optimizeStrChr(llvm::CallInst*,
llvm::IRBuilder<llvm::ConstantFolder, llvm::IRBuilderDefaultInserter>&)
(/home/ishikawa/.mozbuild/clang/bin/../lib/libLLVM-8.so+0xe43f75)
#7 0x00007f9ac1ab2d7a
llvm::LibCallSimplifier::optimizeStringMemoryLibCall(llvm::CallInst*,
llvm::IRBuilder<llvm::ConstantFolder, llvm::IRBuilderDefaultInserter>&)
(/home/ishikawa/.mozbuild/clang/bin/../lib/libLLVM-8.so+0xe4cd7a)
#8 0x00007f9ac1ab3927
llvm::LibCallSimplifier::optimizeCall(llvm::CallInst*)
(/home/ishikawa/.mozbuild/clang/bin/../lib/libLLVM-8.so+0xe4d927)
#9 0x00007f9ac1b8a5a1
llvm::InstCombiner::tryOptimizeCall(llvm::CallInst*)
(/home/ishikawa/.mozbuild/clang/bin/../lib/libLLVM-8.so+0xf245a1)
#10 0x00007f9ac1b87596 llvm::InstCombiner::visitCallSite(llvm::CallSite)
(/home/ishikawa/.mozbuild/clang/bin/../lib/libLLVM-8.so+0xf21596)
#11 0x00007f9ac1b7b90f
llvm::InstCombiner::visitCallInst(llvm::CallInst&)
(/home/ishikawa/.mozbuild/clang/bin/../lib/libLLVM-8.so+0xf1590f)
#12 0x00007f9ac1b563a6 llvm::InstCombiner::run()
(/home/ishikawa/.mozbuild/clang/bin/../lib/libLLVM-8.so+0xef03a6)
#13 0x00007f9ac1b57766 combineInstructionsOverFunction(llvm::Function&,
llvm::InstCombineWorklist&, llvm::AAResults*, llvm::AssumptionCache&,
llvm::TargetLibraryInfo&, llvm::DominatorTree&,
llvm::OptimizationRemarkEmitter&, bool, llvm::LoopInfo*)
(/home/ishikawa/.mozbuild/clang/bin/../lib/libLLVM-8.so+0xef1766)
#14 0x00007f9ac1b57b1f
llvm::InstructionCombiningPass::runOnFunction(llvm::Function&)
(/home/ishikawa/.mozbuild/clang/bin/../lib/libLLVM-8.so+0xef1b1f)
#15 0x00007f9ac139149a
llvm::FPPassManager::runOnFunction(llvm::Function&)
(/home/ishikawa/.mozbuild/clang/bin/../lib/libLLVM-8.so+0x72b49a)
#16 0x00007f9ac1391823 llvm::FPPassManager::runOnModule(llvm::Module&)
(/home/ishikawa/.mozbuild/clang/bin/../lib/libLLVM-8.so+0x72b823)
#17 0x00007f9ac1391d9f llvm::legacy::PassManagerImpl::run(llvm::Module&)
(/home/ishikawa/.mozbuild/clang/bin/../lib/libLLVM-8.so+0x72bd9f)
#18 0x000000000063818e
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::raw_pwrite_stream> >)
(/home/ishikawa/.mozbuild/clang/bin/clang-8+0x63818e)
#19 0x0000000000c85971
clang::BackendConsumer::HandleTranslationUnit(clang::ASTContext&)
(/home/ishikawa/.mozbuild/clang/bin/clang-8+0xc85971)
#20 0x000000000118dd73 clang::ParseAST(clang::Sema&, bool, bool)
(/home/ishikawa/.mozbuild/clang/bin/clang-8+0x118dd73)
#21 0x0000000000aabb57 clang::FrontendAction::Execute()
(/home/ishikawa/.mozbuild/clang/bin/clang-8+0xaabb57)
#22 0x0000000000a529b8
clang::CompilerInstance::ExecuteAction(clang::FrontendAction&)
(/home/ishikawa/.mozbuild/clang/bin/clang-8+0xa529b8)
#23 0x0000000000b3b016
clang::ExecuteCompilerInvocation(clang::CompilerInstance*)
(/home/ishikawa/.mozbuild/clang/bin/clang-8+0xb3b016)
#24 0x00000000005fc45d cc1_main(llvm::ArrayRef<char const*>, char
const*, void*) (/home/ishikawa/.mozbuild/clang/bin/clang-8+0x5fc45d)
#25 0x00000000005fa9e2 main
(/home/ishikawa/.mozbuild/clang/bin/clang-8+0x5fa9e2)
#26 0x00007f9ac07a509b __libc_start_main
(/lib/x86_64-linux-gnu/libc.so.6+0x2409b)
#27 0x00000000005f7ecd _start
(/home/ishikawa/.mozbuild/clang/bin/clang-8+0x5f7ecd)
clang-8: error: unable to execute command: Segmentation fault
clang-8: error: clang frontend command failed due to signal (use -v to
see invocation)
clang version 8.0.0 (tags/RELEASE_800/final)
(llvm/tags/RELEASE_800/final 356365)
Target: x86_64-unknown-linux-gnu
Thread model: posix
InstalledDir: /home/ishikawa/.mozbuild/clang/bin
clang-8: note: diagnostic msg: PLEASE submit a bug report to
https://bugs.llvm.org/ and include the crash backtrace, preprocessed
source, and associated run script.
clang-8: note: diagnostic msg:
********************
PLEASE ATTACH THE FOLLOWING FILES TO THE BUG REPORT:
Preprocessed source(s) and associated run script(s) are located at:
clang-8: note: diagnostic msg: /COMM-CENTRAL/TMP-DIR/line64-f13224.c
clang-8: note: diagnostic msg: /COMM-CENTRAL/TMP-DIR/line64-f13224.sh
clang-8: note: diagnostic msg:
********************
Hopefully wit
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