ROOT segfaults on riscv64

[hack3ric]

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Description

When trying to build ROOT on Arch Linux RISC-V, the compile result always segfaults and is unable to perform any tasks.

Reproducer

1. Use PKGBUILD and other source from https://gitlab.archlinux.org/archlinux/packaging/packages/root/-/tree/6.30.02-2?ref_type=tags
2. Apply RISC-V patch here
3. On a riscv64 machine with Arch Linux RISC-V, makepkg -s
4. Fails on [100%] Generating tutorials/hsimple.root
5. Manually calling src/build/bin/root.exe will result in segfault too

ROOT version

6.30.02

Installation method

build from source

Operating system

Arch Linux RISC-V

Additional context

Stack trace:

#0  0x0000003ff3f3c04c in wait4 () from /usr/lib/libc.so.6
#1  0x0000003ff3ecfeac in ?? () from /usr/lib/libc.so.6
#2  0x0000003ff44daf00 in TUnixSystem::StackTrace() () from /home/hacker/archrv/root/src/build/lib/libCore.so
#3  0x0000003ff44d8040 in TUnixSystem::DispatchSignals(ESignals) () from /home/hacker/archrv/root/src/build/lib/libCore.so
#4  <signal handler called>
#5  0x0000003ff091def4 in llvm::jitlink::ELFLinkGraphBuilder_riscv<llvm::object::ELFType<(llvm::support::endianness)1, true> >::addRelocations() () from /home/hacker/archrv/root/src/build/lib/libCling.so
#6  0x0000003ff091eb50 in llvm::jitlink::createLinkGraphFromELFObject_riscv(llvm::MemoryBufferRef) () from /home/hacker/archrv/root/src/build/lib/libCling.so
#7  0x0000003ff0915cd4 in llvm::jitlink::createLinkGraphFromELFObject(llvm::MemoryBufferRef) () from /home/hacker/archrv/root/src/build/lib/libCling.so
#8  0x0000003ff08fd652 in llvm::jitlink::createLinkGraphFromObject(llvm::MemoryBufferRef) () from /home/hacker/archrv/root/src/build/lib/libCling.so
#9  0x0000003ff08a3a64 in llvm::orc::ObjectLinkingLayer::emit(std::unique_ptr<llvm::orc::MaterializationResponsibility, std::default_delete<llvm::orc::MaterializationResponsibility> >, std::unique_ptr<llvm::MemoryBuffer, std::default_dele
te<llvm::MemoryBuffer> >) () from /home/hacker/archrv/root/src/build/lib/libCling.so
#10 0x0000003ff08ab1e6 in llvm::orc::ObjectTransformLayer::emit(std::unique_ptr<llvm::orc::MaterializationResponsibility, std::default_delete<llvm::orc::MaterializationResponsibility> >, std::unique_ptr<llvm::MemoryBuffer, std::default_de
lete<llvm::MemoryBuffer> >) () from /home/hacker/archrv/root/src/build/lib/libCling.so
#11 0x0000003ff0890cb2 in llvm::orc::IRCompileLayer::emit(std::unique_ptr<llvm::orc::MaterializationResponsibility, std::default_delete<llvm::orc::MaterializationResponsibility> >, llvm::orc::ThreadSafeModule) () from /home/hacker/archrv/
root/src/build/lib/libCling.so
#12 0x0000003ff08ce110 in llvm::orc::IRTransformLayer::emit(std::unique_ptr<llvm::orc::MaterializationResponsibility, std::default_delete<llvm::orc::MaterializationResponsibility> >, llvm::orc::ThreadSafeModule) () from /home/hacker/archr
v/root/src/build/lib/libCling.so
#13 0x0000003ff08ce110 in llvm::orc::IRTransformLayer::emit(std::unique_ptr<llvm::orc::MaterializationResponsibility, std::default_delete<llvm::orc::MaterializationResponsibility> >, llvm::orc::ThreadSafeModule) () from /home/hacker/archr
v/root/src/build/lib/libCling.so
#14 0x0000003ff08959b0 in llvm::orc::BasicIRLayerMaterializationUnit::materialize(std::unique_ptr<llvm::orc::MaterializationResponsibility, std::default_delete<llvm::orc::MaterializationResponsibility> >) () from /home/hacker/archrv/root/
src/build/lib/libCling.so
#15 0x0000003ff08877f6 in llvm::orc::MaterializationTask::run() () from /home/hacker/archrv/root/src/build/lib/libCling.so
#16 0x0000003ff0876886 in void llvm::detail::UniqueFunctionBase<void, std::unique_ptr<llvm::orc::Task, std::default_delete<llvm::orc::Task> > >::CallImpl<void (*)(std::unique_ptr<llvm::orc::Task, std::default_delete<llvm::orc::Task> >)>(v
oid*, std::unique_ptr<llvm::orc::Task, std::default_delete<llvm::orc::Task> >&) () from /home/hacker/archrv/root/src/build/lib/libCling.so
#17 0x0000003ff0887a7c in llvm::orc::ExecutionSession::dispatchOutstandingMUs() () from /home/hacker/archrv/root/src/build/lib/libCling.so
#18 0x0000003ff088db50 in llvm::orc::ExecutionSession::OL_completeLookup(std::unique_ptr<llvm::orc::InProgressLookupState, std::default_delete<llvm::orc::InProgressLookupState> >, std::shared_ptr<llvm::orc::AsynchronousSymbolQuery>, std::
function<void (llvm::DenseMap<llvm::orc::JITDylib*, llvm::DenseSet<llvm::orc::SymbolStringPtr, llvm::DenseMapInfo<llvm::orc::SymbolStringPtr> >, llvm::DenseMapInfo<llvm::orc::JITDylib*>, llvm::detail::DenseMapPair<llvm::orc::JITDylib*, ll
vm::DenseSet<llvm::orc::SymbolStringPtr, llvm::DenseMapInfo<llvm::orc::SymbolStringPtr> > > > const&)>) () from /home/hacker/archrv/root/src/build/lib/libCling.so
#19 0x0000003ff088e09a in llvm::orc::InProgressFullLookupState::complete(std::unique_ptr<llvm::orc::InProgressLookupState, std::default_delete<llvm::orc::InProgressLookupState> >) () from /home/hacker/archrv/root/src/build/lib/libCling.so
#20 0x0000003ff087f864 in llvm::orc::ExecutionSession::OL_applyQueryPhase1(std::unique_ptr<llvm::orc::InProgressLookupState, std::default_delete<llvm::orc::InProgressLookupState> >, llvm::Error) () from /home/hacker/archrv/root/src/build/
lib/libCling.so
#21 0x0000003ff0887d20 in llvm::orc::ExecutionSession::lookup(llvm::orc::LookupKind, std::vector<std::pair<llvm::orc::JITDylib*, llvm::orc::JITDylibLookupFlags>, std::allocator<std::pair<llvm::orc::JITDylib*, llvm::orc::JITDylibLookupFlag
s> > > const&, llvm::orc::SymbolLookupSet, llvm::orc::SymbolState, llvm::unique_function<void (llvm::Expected<llvm::DenseMap<llvm::orc::SymbolStringPtr, llvm::JITEvaluatedSymbol, llvm::DenseMapInfo<llvm::orc::SymbolStringPtr>, llvm::detai
l::DenseMapPair<llvm::orc::SymbolStringPtr, llvm::JITEvaluatedSymbol> > >)>, std::function<void (llvm::DenseMap<llvm::orc::JITDylib*, llvm::DenseSet<llvm::orc::SymbolStringPtr, llvm::DenseMapInfo<llvm::orc::SymbolStringPtr> >, llvm::Dense
MapInfo<llvm::orc::JITDylib*>, llvm::detail::DenseMapPair<llvm::orc::JITDylib*, llvm::DenseSet<llvm::orc::SymbolStringPtr, llvm::DenseMapInfo<llvm::orc::SymbolStringPtr> > > > const&)>) () from /home/hacker/archrv/root/src/build/lib/libCl
ing.so
#22 0x0000003ff088863c in llvm::orc::ExecutionSession::lookup(std::vector<std::pair<llvm::orc::JITDylib*, llvm::orc::JITDylibLookupFlags>, std::allocator<std::pair<llvm::orc::JITDylib*, llvm::orc::JITDylibLookupFlags> > > const&, llvm::or
c::SymbolLookupSet const&, llvm::orc::LookupKind, llvm::orc::SymbolState, std::function<void (llvm::DenseMap<llvm::orc::JITDylib*, llvm::DenseSet<llvm::orc::SymbolStringPtr, llvm::DenseMapInfo<llvm::orc::SymbolStringPtr> >, llvm::DenseMap
Info<llvm::orc::JITDylib*>, llvm::detail::DenseMapPair<llvm::orc::JITDylib*, llvm::DenseSet<llvm::orc::SymbolStringPtr, llvm::DenseMapInfo<llvm::orc::SymbolStringPtr> > > > const&)>) () from /home/hacker/archrv/root/src/build/lib/libCling
.so
#23 0x0000003ff08887e0 in llvm::orc::ExecutionSession::lookup(std::vector<std::pair<llvm::orc::JITDylib*, llvm::orc::JITDylibLookupFlags>, std::allocator<std::pair<llvm::orc::JITDylib*, llvm::orc::JITDylibLookupFlags> > > const&, llvm::or
c::SymbolStringPtr, llvm::orc::SymbolState) () from /home/hacker/archrv/root/src/build/lib/libCling.so
#24 0x0000003ff0899134 in llvm::orc::LLJIT::lookupLinkerMangled(llvm::orc::JITDylib&, llvm::orc::SymbolStringPtr) () from /home/hacker/archrv/root/src/build/lib/libCling.so
#25 0x0000003fef83c596 in cling::IncrementalJIT::getSymbolAddress(llvm::StringRef, bool) () from /home/hacker/archrv/root/src/build/lib/libCling.so
#26 0x0000003fef83fff0 in cling::IncrementalJIT::addOrReplaceDefinition(llvm::StringRef, unsigned long) () from /home/hacker/archrv/root/src/build/lib/libCling.so
#27 0x0000003fef7c9682 in cling::Interpreter::Initialize(bool, bool, llvm::SmallVectorImpl<llvm::StringRef>&) () from /home/hacker/archrv/root/src/build/lib/libCling.so
#28 0x0000003fef7ccd88 in cling::Interpreter::Interpreter(int, char const* const*, char const*, std::vector<std::shared_ptr<clang::ModuleFileExtension>, std::allocator<std::shared_ptr<clang::ModuleFileExtension> > > const&, void*, bool, c
ling::Interpreter const*) () from /home/hacker/archrv/root/src/build/lib/libCling.so
#29 0x0000003fef7377b2 in TCling::TCling(char const*, char const*, char const* const*, void*) () from /home/hacker/archrv/root/src/build/lib/libCling.so
#30 0x0000003fef738aec in CreateInterpreter () from /home/hacker/archrv/root/src/build/lib/libCling.so
#31 0x0000003ff43fb9e6 in TROOT::InitInterpreter() () from /home/hacker/archrv/root/src/build/lib/libCore.so
#32 0x0000003ff43fbdfc in ROOT::Internal::GetROOT2() () from /home/hacker/archrv/root/src/build/lib/libCore.so
#33 0x0000003ff43b8784 in TApplication::TApplication(char const*, int*, char**, void*, int) () from /home/hacker/archrv/root/src/build/lib/libCore.so
#34 0x0000003ff4686bbe in TRint::TRint(char const*, int*, char**, void*, int, bool, bool) () from /home/hacker/archrv/root/src/build/lib/libRint.so
#35 0x0000002ab3d5bf32 in main ()

[ferdymercury]

Thanks for the report. Could you also try with 6.30.04 to see if something changes?

[ferdymercury]

@hahnjo might be of help here

[hahnjo]

Yes, this is correct: As explained in #12351, we didn't backport the necessary patches to LLVM 13 as found in ROOT 6.30.{02,04}. They are automatically available after the upgrade to LLVM 16 which doesn't have a ROOT release yet.