OpenMP crash #24037
Comments
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Possibly resolved by Chandler's changes. Works fine with r238544 |
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Ok reopen was testing a wrong build. |
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Compile time crash seems to be resolved but now the resulting executable crashes, how to reproduce:
λ ldd a.out
λ ./a.out 100 Looking under gdb the backtrace looks like an infinite recursion: [...] |
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Thanks.
I did "ulimit -s unlimited" but the executable still crashes λ ./a.out 100 |
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Fixed in revision 239524. |
Thanks I'll try to confirm that, meanwhile can you try the run the app with 100 as input? If that works try 5000 ? gcc works fine with those inputs with 8k stacks. |
It is fixed, try now.
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Ok, will try |
Well I am on very recent (1 day old) llvm/clang/libiomp trunk on Linux x86-64. |
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My results on MacOS $ ./a.out Waiting for 5000 |
Please try on Linux x86-64 just to be sure. |
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On Linux x86_64 |
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If I compile with -O2 I can't reproduce the crash either, but at -O0 I can reproduce it. |
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tsan points out some data races inside libiomp: Atomic read of size 1 at 0x7d680001cd40 by main thread: Previous write of size 1 at 0x7d680001cd40 by thread T5: Location is heap block of size 1504 at 0x7d680001c800 allocated by main thread: Thread T5 (tid=4196, running) created by main thread at: SUMMARY: ThreadSanitizer: data race /usr/src/debug/llvm/stage2/../projects/openmp/runtime/src/z_Linux_util.c:1842:14 in void __kmp_resume_template<kmp_flag_64>(int, kmp_flag_64*)Rendering (100 spp) 0.13%================== Previous write of size 1 at 0x7d680001a940 by thread T8: Location is heap block of size 1504 at 0x7d680001a400 allocated by main thread: Thread T5 (tid=4196, running) created by main thread at: Thread T8 (tid=4199, running) created by main thread at: SUMMARY: ThreadSanitizer: data race /usr/src/debug/llvm/stage2/../projects/openmp/runtime/src/z_Linux_util.c:1842:14 in void __kmp_resume_template<kmp_flag_64>(int, kmp_flag_64*) |
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I think it's better to report this problem to openmp-dev mailing list directly. |
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Since original bug is fixed, I am closing this bug as fixed. Thank you! For the other crash I'll send an email to openmp-dev. |
Extended Description
Reduced from http://www.kevinbeason.com/smallpt/smallpt.txt
λ clang -v
clang version 3.7.0 (trunk 238128)
Target: x86_64-suse-linux
Thread model: posix
Found candidate GCC installation: /usr/lib64/gcc/x86_64-suse-linux/4.8
Selected GCC installation: /usr/lib64/gcc/x86_64-suse-linux/4.8
Candidate multilib: .;@m64
Candidate multilib: 32;@m32
Selected multilib: .;@m64
λ cat t.cpp
struct t {
double x;
};
int main(){
int h;
t r;
#pragma omp parallel for schedule(dynamic, 1) private(r)
for (int y=0; y<h; y++){
}
}
λ clang++ -fopenmp -O2 t.cpp
clang-3.7: ../tools/clang/lib/CodeGen/CGCleanup.cpp:629: void clang::CodeGen::CodeGenFunction::PopCleanupBlock(bool): Assertio
n `!Scope.isNormalCleanup() || !HasPrebranchedFallthrough || (Scope.getNormalBlock() && FallthroughSource->getTerminator()->ge
tSuccessor(0) == Scope.getNormalBlock())' failed.
#0 0x7f4f62bae778 llvm::sys::PrintStackTrace(llvm::raw_ostream&) (/opt/clang/lib64/libLLVMSupport.so.3.7+0xc7778)
#1 0x7f4f62bafc0b (/opt/clang/lib64/libLLVMSupport.so.3.7+0xc8c0b)
#2 0x7f4f610c9440 __restore_rt (/lib64/libc.so.6+0x33440)
#3 0x7f4f610c93c7 __GI_raise /usr/src/debug/glibc-2.21/signal/../sysdeps/unix/sysv/linux/raise.c:55:0
#4 0x7f4f610ca79a __GI_abort /usr/src/debug/glibc-2.21/stdlib/abort.c:80:0
#5 0x7f4f610c22e6 __assert_fail_base /usr/src/debug/glibc-2.21/assert/assert.c:92:0
#6 0x7f4f610c2392 (/lib64/libc.so.6+0x2c392)
#7 0x7f4f5b9eb676 clang::CodeGen::CodeGenFunction::PopCleanupBlock(bool) (/opt/clang/lib64/libclangCodeGen.so.3.7+0xd4676)
#8 0x7f4f5b9eb9d2 clang::CodeGen::CodeGenFunction::PopCleanupBlocks(clang::CodeGen::EHScopeStack::stable_iterator, unsigned lo
ng) (/opt/clang/lib64/libclangCodeGen.so.3.7+0xd49d2)
#9 0x7f4f5baaee2d (/opt/clang/lib64/libclangCodeGen.so.3.7+0x197e2d)
#10 0x7f4f5baabfc2 (/opt/clang/lib64/libclangCodeGen.so.3.7+0x194fc2)
#11 0x7f4f5baca8ed (/opt/clang/lib64/libclangCodeGen.so.3.7+0x1b38ed)
#12 0x7f4f5bac9cc2 clang::CodeGen::CodeGenFunction::EmitOMPWorksharingLoop(clang::OMPLoopDirective const&) (/opt/clang/lib64/libclangCodeGen.so.3.7+0x1b2cc2)
#13 0x7f4f5bad2295 (/opt/clang/lib64/libclangCodeGen.so.3.7+0x1bb295)
#14 0x7f4f5baad851 (/opt/clang/lib64/libclangCodeGen.so.3.7+0x196851)
#15 0x7f4f5bac32cf clang::CodeGen::CodeGenFunction::GenerateCapturedStmtFunction(clang::CapturedStmt const&) (/opt/clang/lib64
/libclangCodeGen.so.3.7+0x1ac2cf)
#16 0x7f4f5baa2be8 clang::CodeGen::CGOpenMPRuntime::emitParallelOutlinedFunction(clang::OMPExecutableDirective const&, clang::
VarDecl const*, llvm::function_ref<void (clang::CodeGen::CodeGenFunction&)> const&) (/opt/clang/lib64/libclangCodeGen.so.3.7+0
x18bbe8)
#17 0x7f4f5bac7931 (/opt/clang/lib64/libclangCodeGen.so.3.7+0x1b0931)
#18 0x7f4f5bacc243 clang::CodeGen::CodeGenFunction::EmitOMPParallelForDirective(clang::OMPParallelForDirective const&) (/opt/c
lang/lib64/libclangCodeGen.so.3.7+0x1b5243)
#19 0x7f4f5bab8b54 clang::CodeGen::CodeGenFunction::EmitStmt(clang::Stmt const*) (/opt/clang/lib64/libclangCodeGen.so.3.7+0x1a
1b54)
#20 0x7f4f5bac02dc clang::CodeGen::CodeGenFunction::EmitCompoundStmtWithoutScope(clang::CompoundStmt const&, bool, clang::Code
Gen::AggValueSlot) (/opt/clang/lib64/libclangCodeGen.so.3.7+0x1a92dc)
#21 0x7f4f5bae4a2a clang::CodeGen::CodeGenFunction::GenerateCode(clang::GlobalDecl, llvm::Function*, clang::CodeGen::CGFunctio
nInfo const&) (/opt/clang/lib64/libclangCodeGen.so.3.7+0x1cda2a)
#22 0x7f4f5baf2733 clang::CodeGen::CodeGenModule::EmitGlobalFunctionDefinition(clang::GlobalDecl, llvm::GlobalValue*) (/opt/cl
ang/lib64/libclangCodeGen.so.3.7+0x1db733)
#23 0x7f4f5baef5c3 clang::CodeGen::CodeGenModule::EmitGlobalDefinition(clang::GlobalDecl, llvm::GlobalValue*) (/opt/clang/lib6
4/libclangCodeGen.so.3.7+0x1d85c3)
#24 0x7f4f5baf4169 clang::CodeGen::CodeGenModule::EmitTopLevelDecl(clang::Decl*) (/opt/clang/lib64/libclangCodeGen.so.3.7+0x1d
d169)
#25 0x7f4f5bb57acf (/opt/clang/lib64/libclangCodeGen.so.3.7+0x240acf)
#26 0x7f4f5badf1e7 (/opt/clang/lib64/libclangCodeGen.so.3.7+0x1c81e7)
#27 0x7f4f5cce7343 clang::ParseAST(clang::Sema&, bool, bool) (/opt/clang/lib64/libclangParse.so.3.7+0x2b343)
#28 0x7f4f61bd82ce clang::FrontendAction::Execute() (/opt/clang/lib64/libclangFrontend.so.3.7+0xa22ce)
#29 0x7f4f61baa2cc clang::CompilerInstance::ExecuteAction(clang::FrontendAction&) (/opt/clang/lib64/libclangFrontend.so.3.7+0x742cc)
#30 0x7f4f619341ec clang::ExecuteCompilerInvocation(clang::CompilerInstance*) (/opt/clang/lib64/libclangFrontendTool.so.3.7+0x31ec)
#31 0x40f5b1 cc1_main(llvm::ArrayRef<char const*>, char const*, void*) (/opt/clang/bin/clang-3.7+0x40f5b1)
#32 0x40e386 main (/opt/clang/bin/clang-3.7+0x40e386)
#33 0x7f4f610b68c5 __libc_start_main /usr/src/debug/glibc-2.21/csu/libc-start.c:323:0
#34 0x40b959 _start (/opt/clang/bin/clang-3.7+0x40b959)
Stack dump:
0. Program arguments: /opt/clang/bin/clang-3.7 -cc1 -triple x86_64-suse-linux -emit-obj -disable-free -main-file-name t.cpp -mrelocation-model static -mthread-model posix -fmath-errno -masm-verbose -mconstructor-aliases -munwind-tables -fuse-init-array -target-cpu x86-64 -momit-leaf-frame-pointer -dwarf-column-info -resource-dir /opt/clang/bin/../lib64/clang/3.7.0 -internal-isystem /opt/clang/bin/../include/c++/v1 -internal-isystem /usr/local/include -internal-isystem /opt/clang/bin/../lib64/clang/3.7.0/include -internal-externc-isystem /include -internal-externc-isystem /usr/include -O2 -fdeprecated-macro -fdebug-compilation-dir /home/ismail -ferror-limit 19 -fmessage-length 126 -fopenmp -mstackrealign -fobjc-runtime=gcc -fcxx-exceptions -fexceptions -fdiagnostics-show-option -fcolor-diagnostics -vectorize-loops -vectorize-slp -o /tmp/t-c07ad4.o -x c++ t.cpp
clang-3.7: error: unable to execute command: Aborted
clang-3.7: error: clang frontend command failed due to signal (use -v to see invocation)
clang version 3.7.0 (trunk 238128)
Target: x86_64-suse-linux
Thread model: posix
clang-3.7: note: diagnostic msg: PLEASE submit a bug report to http://llvm.org/bugs/ and include the crash backtrace, preprocessed source, and associated run script.
clang-3.7: note: diagnostic msg:
PLEASE ATTACH THE FOLLOWING FILES TO THE BUG REPORT:
Preprocessed source(s) and associated run script(s) are located at:
clang-3.7: note: diagnostic msg: /tmp/t-cfa054.cpp
clang-3.7: note: diagnostic msg: /tmp/t-cfa054.sh
clang-3.7: note: diagnostic msg:
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