[PATCH] D125847: LTO: Add option to initialize with opaque/non-opaque pointer types

Fri Jun 3 16:36:10 PDT 2022

Jake-Egan added a comment.

In D125847#3554706 <https://reviews.llvm.org/D125847#3554706>, @MatzeB wrote:

> In D125847#3554569 <https://reviews.llvm.org/D125847#3554569>, @Jake-Egan wrote:
>
>> Hi, this caused `arm-float-abi-lto.c` to fail on AIX. The failure went away for a few builds, then came back. Could you take a look?
>>
>> https://lab.llvm.org/buildbot/#/builders/214/builds/1625/steps/6/logs/FAIL__Clang__arm-float-abi-lto_c
>
> Uh, this change just enables opaque pointers for this test. And it appears to be crashing nondeterministically somewhere within LLVM. Unfortunately I don't see this happening on my X86 development machine. None of the ASAN enabled buildbots appears to complain either. I don't know how to even start debugging this, do you have at least a stacktrace?

Sorry about the delayed response. Here is a stack trace:

  #0  0x0000000100013e50 in llvm::StringRef::find(llvm::StringRef, unsigned long) const ()
  #1  0x0000000101b17fd4 in llvm::ARM_MC::ParseARMTriple(llvm::Triple const&, llvm::StringRef) ()
  #2  0x0000000102c16294 in llvm::ARMAsmPrinter::emitAttributes() ()
  #3  0x0000000102c16008 in llvm::ARMAsmPrinter::emitStartOfAsmFile(llvm::Module&) ()
  #4  0x0000000102a6a980 in llvm::AsmPrinter::doInitialization(llvm::Module&) ()
  #5  0x00000001001bdecc in llvm::FPPassManager::doInitialization(llvm::Module&) ()
  #6  0x0000000103c9d2a0 in llvm::legacy::PassManagerImpl::run(llvm::Module&) ()
  #7  0x0000000103c9ce34 in llvm::legacy::PassManager::run(llvm::Module&) ()
  #8  0x0000000103c97014 in codegen(llvm::lto::Config const&, llvm::TargetMachine*, std::__1::function<llvm::Expected<std::__1::unique_ptr<llvm::CachedFileStream, std::__1::default_delete<llvm::CachedFileStream> > > (unsigned int)>, unsigned int, llvm::Module&, llvm::ModuleSummaryIndex const&) ()
  #9  0x00000001030105c0 in llvm::lto::thinBackend(llvm::lto::Config const&, unsigned int, std::__1::function<llvm::Expected<std::__1::unique_ptr<llvm::CachedFileStream, std::__1::default_delete<llvm::CachedFileStream> > > (unsigned int)>, llvm::Module&, llvm::ModuleSummaryIndex const&, llvm::StringMap<std::__1::unordered_set<unsigned long, std::__1::hash<unsigned long>, std::__1::equal_to<unsigned long>, std::__1::allocator<unsigned long> >, llvm::MallocAllocator> const&, llvm::DenseMap<unsigned long, llvm::GlobalValueSummary*, llvm::DenseMapInfo<unsigned long, void>, llvm::detail::DenseMapPair<unsigned long, llvm::GlobalValueSummary*> > const&, llvm::MapVector<llvm::StringRef, llvm::BitcodeModule, llvm::DenseMap<llvm::StringRef, unsigned int, llvm::DenseMapInfo<llvm::StringRef, void>, llvm::detail::DenseMapPair<llvm::StringRef, unsigned int> >, std::__1::vector<std::__1::pair<llvm::StringRef, llvm::BitcodeModule>, std::__1::allocator<std::__1::pair<llvm::StringRef, llvm::BitcodeModule> > > >*, std::__1::vector<unsigned char, std::__1::allocator<unsigned char> > const&)::$_3::operator()(llvm::Module&, llvm::TargetMachine*, std::__1::unique_ptr<llvm::ToolOutputFile, std::__1::default_delete<llvm::ToolOutputFile> >) const ()
  #10 0x0000000103000b54 in llvm::lto::thinBackend(llvm::lto::Config const&, unsigned int, std::__1::function<llvm::Expected<std::__1::unique_ptr<llvm::CachedFileStream, std::__1::default_delete<llvm::CachedFileStream> > > (unsigned int)>, llvm::Module&, llvm::ModuleSummaryIndex const&, llvm::StringMap<std::__1::unordered_set<unsigned long, std::__1::hash<unsigned long>, std::__1::equal_to<unsigned long>, std::__1::allocator<unsigned long> >, llvm::MallocAllocator> const&, llvm::DenseMap<unsigned long, llvm::GlobalValueSummary*, llvm::DenseMapInfo<unsigned long, void>, llvm::detail::DenseMapPair<unsigned long, llvm::GlobalValueSummary*> > const&, llvm::MapVector<llvm::StringRef, llvm::BitcodeModule, llvm::DenseMap<llvm::StringRef, unsigned int, llvm::DenseMapInfo<llvm::StringRef, void>, llvm::detail::DenseMapPair<llvm::StringRef, unsigned int> >, std::__1::vector<std::__1::pair<llvm::StringRef, llvm::BitcodeModule>, std::__1::allocator<std::__1::pair<llvm::StringRef, llvm::BitcodeModule> > > >*, std::__1::vector<unsigned char, std::__1::allocator<unsigned char> > const&) ()
  #11 0x0000000102fff380 in (anonymous namespace)::InProcessThinBackend::runThinLTOBackendThread(std::__1::function<llvm::Expected<std::__1::unique_ptr<llvm::CachedFileStream, std::__1::default_delete<llvm::CachedFileStream> > > (unsigned int)>, std::__1::function<llvm::Expected<std::__1::function<llvm::Expected<std::__1::unique_ptr<llvm::CachedFileStream, std::__1::default_delete<llvm::CachedFileStream> > > (unsigned int)> > (unsigned int, llvm::StringRef)>, unsigned int, llvm::BitcodeModule, llvm::ModuleSummaryIndex&, llvm::StringMap<std::__1::unordered_set<unsigned long, std::__1::hash<unsigned long>, std::__1::equal_to<unsigned long>, std::__1::allocator<unsigned long> >, llvm::MallocAllocator> const&, llvm::DenseSet<llvm::ValueInfo, llvm::DenseMapInfo<llvm::ValueInfo, void> > const&, std::__1::map<unsigned long, llvm::GlobalValue::LinkageTypes, std::__1::less<unsigned long>, std::__1::allocator<std::__1::pair<unsigned long const, llvm::GlobalValue::LinkageTypes> > > const&, llvm::DenseMap<unsigned long, llvm::GlobalValueSummary*, llvm::DenseMapInfo<unsigned long, void>, llvm::detail::DenseMapPair<unsigned long, llvm::GlobalValueSummary*> > const&, llvm::MapVector<llvm::StringRef, llvm::BitcodeModule, llvm::DenseMap<llvm::StringRef, unsigned int, llvm::DenseMapInfo<llvm::StringRef, void>, llvm::detail::DenseMapPair<llvm::StringRef, unsigned int> >, std::__1::vector<std::__1::pair<llvm::StringRef, llvm::BitcodeModule>, std::__1::allocator<std::__1::pair<llvm::StringRef, llvm::BitcodeModule> > > >&)::{lambda(std::__1::function<llvm::Expected<std::__1::unique_ptr<llvm::CachedFileStream, std::__1::default_delete<llvm::CachedFileStream> > > (unsigned int)>)#1}::operator()(std::__1::function<llvm::Expected<std::__1::unique_ptr<llvm::CachedFileStream, std::__1::default_delete<llvm::CachedFileStream> > > (unsigned int)>) const ()
  #12 0x0000000102ffe54c in std::__1::__function::__func<std::__1::__bind<(anonymous namespace)::InProcessThinBackend::start(unsigned int, llvm::BitcodeModule, llvm::StringMap<std::__1::unordered_set<unsigned long, std::__1::hash<unsigned long>, std::__1::equal_to<unsigned long>, std::__1::allocator<unsigned long> >, llvm::MallocAllocator> const&, llvm::DenseSet<llvm::ValueInfo, llvm::DenseMapInfo<llvm::ValueInfo, void> > const&, std::__1::map<unsigned long, llvm::GlobalValue::LinkageTypes, std::__1::less<unsigned long>, std::__1::allocator<std::__1::pair<unsigned long const, llvm::GlobalValue::LinkageTypes> > > const&, llvm::MapVector<llvm::StringRef, llvm::BitcodeModule, llvm::DenseMap<llvm::StringRef, unsigned int, llvm::DenseMapInfo<llvm::StringRef, void>, llvm::detail::DenseMapPair<llvm::StringRef, unsigned int> >, std::__1::vector<std::__1::pair<llvm::StringRef, llvm::BitcodeModule>, std::__1::allocator<std::__1::pair<llvm::StringRef, llvm::BitcodeModule> > > >&)::{lambda(llvm::BitcodeModule, llvm::ModuleSummaryIndex&, llvm::StringMap<std::__1::unordered_set<unsigned long, std::__1::hash<unsigned long>, std::__1::equal_to<unsigned long>, std::__1::allocator<unsigned long> >, llvm::MallocAllocator> const&, llvm::DenseSet<llvm::ValueInfo, llvm::DenseMapInfo<llvm::ValueInfo, void> > const&, std::__1::map<unsigned long, llvm::GlobalValue::LinkageTypes, std::__1::less<unsigned long>, std::__1::allocator<std::__1::pair<unsigned long const, llvm::GlobalValue::LinkageTypes> > > const&, llvm::DenseMap<unsigned long, llvm::GlobalValueSummary*, llvm::DenseMapInfo<unsigned long, void>, llvm::detail::DenseMapPair<unsigned long, llvm::GlobalValueSummary*> > const&, llvm::MapVector<llvm::StringRef, llvm::BitcodeModule, llvm::DenseMap<llvm::StringRef, unsigned int, llvm::DenseMapInfo<llvm::StringRef, void>, llvm::detail::DenseMapPair<llvm::StringRef, unsigned int> >, std::__1::vector<std::__1::pair<llvm::StringRef, llvm::BitcodeModule>, std::__1::allocator<std::__1::pair<llvm::StringRef, llvm::BitcodeModule> > > >&)#1}, llvm::BitcodeModule&, std::__1::reference_wrapper<llvm::ModuleSummaryIndex>, std::__1::reference_wrapper<llvm::StringMap<std::__1::unordered_set<unsigned long, std::__1::hash<unsigned long>, std::__1::equal_to<unsigned long>, std::__1::allocator<unsigned long> >, llvm::MallocAllocator> const>, std::__1::reference_wrapper<llvm::DenseSet<llvm::ValueInfo, llvm::DenseMapInfo<llvm::ValueInfo, void> > const>, std::__1::reference_wrapper<std::__1::map<unsigned long, llvm::GlobalValue::LinkageTypes, std::__1::less<unsigned long>, std::__1::allocator<std::__1::pair<unsigned long const, llvm::GlobalValue::LinkageTypes> > > const>, std::__1::reference_wrapper<llvm::DenseMap<unsigned long, llvm::GlobalValueSummary*, llvm::DenseMapInfo<unsigned long, void>, llvm::detail::DenseMapPair<unsigned long, llvm::GlobalValueSummary*> > const>, std::__1::reference_wrapper<llvm::MapVector<llvm::StringRef, llvm::BitcodeModule, llvm::DenseMap<llvm::StringRef, unsigned int, llvm::DenseMapInfo<llvm::StringRef, void>, llvm::detail::DenseMapPair<llvm::StringRef, unsigned int> >, std::__1::vector<std::__1::pair<llvm::StringRef, llvm::BitcodeModule>, std::__1::allocator<std::__1::pair<llvm::StringRef, llvm::BitcodeModule> > > > > >, std::__1::allocator<std::__1::__bind<(anonymous namespace)::InProcessThinBackend::start(unsigned int, llvm::BitcodeModule, llvm::StringMap<std::__1::unordered_set<unsigned long, std::__1::hash<unsigned long>, std::__1::equal_to<unsigned long>, std::__1::allocator<unsigned long> >, llvm::MallocAllocator> const&, llvm::DenseSet<llvm::ValueInfo, llvm::DenseMapInfo<llvm::ValueInfo, void> > const&, std::__1::map<unsigned long, llvm::GlobalValue::LinkageTypes, std::__1::less<unsigned long>, std::__1::allocator<std::__1::pair<unsigned long const, llvm::GlobalValue::LinkageTypes> > > const&, llvm::MapVector<llvm::StringRef, llvm::BitcodeModule, llvm::DenseMap<llvm::StringRef, unsigned int, llvm::DenseMapInfo<llvm::StringRef, void>, llvm::detail::DenseMapPair<llvm::StringRef, unsigned int> >, std::__1::vector<std::__1::pair<llvm::StringRef, llvm::BitcodeModule>, std::__1::allocator<std::__1::pair<llvm::StringRef, llvm::BitcodeModule> > > >&)::{lambda(llvm::BitcodeModule, llvm::ModuleSummaryIndex&, llvm::StringMap<std::__1::unordered_set<unsigned long, std::__1::hash<unsigned long>, std::__1::equal_to<unsigned long>, std::__1::allocator<unsigned long> >, llvm::MallocAllocator> const&, llvm::DenseSet<llvm::ValueInfo, llvm::DenseMapInfo<llvm::ValueInfo, void> > const&, std::__1::map<unsigned long, llvm::GlobalValue::LinkageTypes, std::__1::less<unsigned long>, std::__1::allocator<std::__1::pair<unsigned long const, llvm::GlobalValue::LinkageTypes> > > const&, llvm::DenseMap<unsigned long, llvm::GlobalValueSummary*, llvm::DenseMapInfo<unsigned long, void>, llvm::detail::DenseMapPair<unsigned long, llvm::GlobalValueSummary*> > const&, llvm::MapVector<llvm::StringRef, llvm::BitcodeModule, llvm::DenseMap<llvm::StringRef, unsigned int, llvm::DenseMapInfo<llvm::StringRef, void>, llvm::detail::DenseMapPair<llvm::StringRef, unsigned int> >, std::__1::vector<std::__1::pair<llvm::StringRef, llvm::BitcodeModule>, std::__1::allocator<std::__1::pair<llvm::StringRef, llvm::BitcodeModule> > > >&)#1}, llvm::BitcodeModule&, std::__1::reference_wrapper<llvm::ModuleSummaryIndex>, std::__1::reference_wrapper<llvm::StringMap<std::__1::unordered_set<unsigned long, std::__1::hash<unsigned long>, std::__1::equal_to<unsigned long>, std::__1::allocator<unsigned long> >, llvm::MallocAllocator> const>, std::__1::reference_wrapper<llvm::DenseSet<llvm::ValueInfo, llvm::DenseMapInfo<llvm::ValueInfo, void> > const>, std::__1::reference_wrapper<std::__1::map<unsigned long, llvm::GlobalValue::LinkageTypes, std::__1::less<unsigned long>, std::__1::allocator<std::__1::pair<unsigned long const, llvm::GlobalValue::LinkageTypes> > > const>, std::__1::reference_wrapper<llvm::DenseMap<unsigned long, llvm::GlobalValueSummary*, llvm::DenseMapInfo<unsigned long, void>, llvm::detail::DenseMapPair<unsigned long, llvm::GlobalValueSummary*> > const>, std::__1::reference_wrapper<llvm::MapVector<llvm::StringRef, llvm::BitcodeModule, llvm::DenseMap<llvm::StringRef, unsigned int, llvm::DenseMapInfo<llvm::StringRef, void>, llvm::detail::DenseMapPair<llvm::StringRef, unsigned int> >, std::__1::vector<std::__1::pair<llvm::StringRef, llvm::BitcodeModule>, std::__1::allocator<std::__1::pair<llvm::StringRef, llvm::BitcodeModule> > > > > > >, void ()>::operator()() ()
  #13 0x0000000103caa248 in std::__1::__function::__func<llvm::ThreadPool::createTaskAndFuture(std::__1::function<void ()>)::{lambda()#1}, std::__1::allocator<llvm::ThreadPool::createTaskAndFuture(std::__1::function<void ()>)::{lambda()#1}>, void ()>::operator()() ()
  #14 0x0000000103caba5c in llvm::ThreadPool::processTasks(llvm::ThreadPoolTaskGroup*) ()
  #15 0x0000000103cab3e4 in void* llvm::thread::ThreadProxy<std::__1::tuple<llvm::ThreadPool::grow(int)::$_0> >(void*) ()
  #16 0x09000000005b304c in _pthread_body () from /usr/lib/libpthreads.a(shr_xpg5_64.o)
  #17 0x0000000000000000 in ?? ()

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https://reviews.llvm.org/D125847