On QEMU, `swift` immediate mode crashes due to relative pointer relocation failure

[sonsongithub]

Describe the bug
When I call CommandLine.arguments.first, swift-frontend crashes.

Source code, test.swift.

if let obj = CommandLine.arguments.first {
    print(obj)
}

Steps To Reproduce
Steps to reproduce the behavior:

1. $ echo "if let obj = CommandLine.arguments.first { print(obj) }" > test.swift
2. $ docker run --rm -it -v $(pwd):/src --platform linux/amd64 swift:5.6.2 swift /src/test.swift
3. It crashes.

I got following results,

# swift test.swift "ok"
Stack dump:
0.	Program arguments: /usr/bin/swift-frontend -frontend -interpret test.swift -disable-objc-interop -color-diagnostics -new-driver-path /usr/bin/swift-driver -resource-dir /usr/lib/swift -module-name test -- ok
1.	Swift version 5.6.2 (swift-5.6.2-RELEASE)
2.	Compiling with the current language version
4.	While running user code "test.swift"
Stack dump without symbol names (ensure you have llvm-symbolizer in your PATH or set the environment var `LLVM_SYMBOLIZER_PATH` to point to it):
/usr/bin/swift-frontend[0x5187de3]
/usr/bin/swift-frontend[0x5185b7e]
/usr/bin/swift-frontend[0x5188176]
/lib/x86_64-linux-gnu/libpthread.so.0(+0x12980)[0x4000a46980]
/usr/lib/swift/linux/libswiftCore.so(swift_getTypeByMangledName+0x162)[0x40012676a2]
/usr/lib/swift/linux/libswiftCore.so(swift_getTypeByMangledNameInContext+0xa7)[0x4001267c97]
[0x4011a2b3f4]
[0x4011a2b1d2]
/usr/bin/swift-frontend[0x5cd69a]
/usr/bin/swift-frontend[0x4d4404]
/usr/bin/swift-frontend[0x499e69]
/usr/bin/swift-frontend[0x4993ed]
/usr/bin/swift-frontend[0x48dfb8]
/usr/bin/swift-frontend[0x4463af]
/lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xe7)[0x4002628c87]
/usr/bin/swift-frontend[0x445dda]
qemu: uncaught target signal 11 (Segmentation fault) - core dumped
Segmentation fault

Expected behavior
Expected results(this results got from swiftc command.)

> swiftc test.swift
> ./test
error
Array<String>
./test

Screenshots
Nothing.

Environment (please fill out the following information)

• Host machine: MacBook Pro (14-inch, 2021)
• macOS 12.5.1
• Docker.app(v4.11.1)
• Dockerfile
• OS: Linux 2afa64e6e5c2 5.10.104-linuxkit x86_64 x86_64 x86_64 GNU/Linux
• Swift version 5.6.2 (swift-5.6.2-RELEASE)
• Target: x86_64-unknown-linux-gnu

Additional context
Nothing.

[kateinoigakukun]

This issue is reproducible on the latest nightly snapshot image.

It looks like the crash point is in the runtime relocation process of LLVM ORC:

  case ELF::R_X86_64_PC32: {
    uint64_t FinalAddress = Section.getLoadAddressWithOffset(Offset);
    int64_t RealOffset = Value + Addend - FinalAddress;
    assert(isInt<32>(RealOffset));
    int32_t TruncOffset = (RealOffset & 0xFFFFFFFF);
    support::ulittle32_t::ref(Section.getAddressWithOffset(Offset)) =
        TruncOffset;
    break;
  }

https://github.com/llvm/llvm-project/blob/2ede992c01c4e7faaa9649b56903f0551c190eda/llvm/lib/ExecutionEngine/RuntimeDyld/RuntimeDyldELF.cpp#L319

R_X86_64_PC32 relocation assumes the subtraction between the target symbol address and relocating address fits in 32-bit signed integer. However, ORC on QEMU somehow loads them too far places.

Minimal reproducible snippet:

protocol P {}
struct X: P {}

$ docker run --rm -it -v $(pwd):/src --platform linux/amd64 swiftlang/swift:nightly-main-jammy bash
 ################################################################
 #                                                              #
 # Swift Nightly Docker Image                                   #
 # Tag: swift-DEVELOPMENT-SNAPSHOT-2022-08-18-a                 #
 #                                                              #
 ################################################################

$ apt update && apt install llvm -y # Install llvm-symbolizer
$ swift /src/test.swift
swift-frontend: /home/build-user/llvm-project/llvm/lib/ExecutionEngine/RuntimeDyld/RuntimeDyldELF.cpp:319: void llvm::RuntimeDyldELF::resolveX86_64Relocation(const llvm::SectionEntry &, uint64_t, uint64_t, uint32_t, int64_t, uint64_t): Assertion `isInt<32>(RealOffset)' failed.
Stack dump:
0.      Program arguments: /usr/bin/swift-frontend -frontend -interpret /src/test.swift -disable-objc-interop -color-diagnostics -new-driver-path /usr/bin/swift-driver -empty-abi-descriptor -resource-dir /usr/lib/swift -module-name test
1.      Swift version 5.8-dev (LLVM b2416e1165ab97c, Swift 965a54f037cfa76)
2.      Compiling with the current language version
3.      While running user code "/src/test.swift"
 #0 0x0000000006347e73 llvm::sys::PrintStackTrace(llvm::raw_ostream&, int) (/usr/bin/swift-frontend+0x6347e73)
 #1 0x0000000006345a1e llvm::sys::RunSignalHandlers() (/usr/bin/swift-frontend+0x6345a1e)
 #2 0x0000000006348206 SignalHandler(int) (/usr/bin/swift-frontend+0x6348206)
 #3 0x0000004000a47980 __restore_rt (/lib/x86_64-linux-gnu/libpthread.so.0+0x12980)
 #4 0x0000004002685e87 gsignal (/lib/x86_64-linux-gnu/libc.so.6+0x3ee87)
 #5 0x00000040026877f1 abort (/lib/x86_64-linux-gnu/libc.so.6+0x407f1)
 #6 0x00000040026773fa (/lib/x86_64-linux-gnu/libc.so.6+0x303fa)
 #7 0x0000004002677472 (/lib/x86_64-linux-gnu/libc.so.6+0x30472)
 #8 0x00000000018e08c8 llvm::RuntimeDyldELF::resolveX86_64Relocation(llvm::SectionEntry const&, unsigned long, unsigned long, unsigned int, long, unsigned long) (/usr/bin/swift-frontend+0x18e08c8)
 #9 0x00000000018e28a3 llvm::RuntimeDyldELF::resolveRelocation(llvm::SectionEntry const&, unsigned long, unsigned long, unsigned int, long, unsigned long, unsigned int) (/usr/bin/swift-frontend+0x18e28a3)
#10 0x00000000018e27cc llvm::RuntimeDyldELF::resolveRelocation(llvm::RelocationEntry const&, unsigned long) (/usr/bin/swift-frontend+0x18e27cc)
#11 0x00000000018cbd6c llvm::RuntimeDyldImpl::resolveLocalRelocations() (/usr/bin/swift-frontend+0x18cbd6c)
#12 0x00000000018d3e78 llvm::RuntimeDyldImpl::finalizeAsync(std::unique_ptr<llvm::RuntimeDyldImpl, std::default_delete<llvm::RuntimeDyldImpl> >, llvm::unique_function<void (llvm::object::OwningBinary<llvm::object::ObjectFile>, std::unique_ptr<llvm::RuntimeDyld::LoadedObjectInfo, std::default_delete<llvm::RuntimeDyld::LoadedObjectInfo> >, llvm::Error)>, llvm::object::OwningBinary<llvm::object::ObjectFile>, std::unique_ptr<llvm::RuntimeDyld::LoadedObjectInfo, std::default_delete<llvm::RuntimeDyld::LoadedObjectInfo> >)::$_0::operator()(llvm::Expected<std::map<llvm::StringRef, llvm::JITEvaluatedSymbol, std::less<llvm::StringRef>, std::allocator<std::pair<llvm::StringRef const, llvm::JITEvaluatedSymbol> > > >) (/usr/bin/swift-frontend+0x18d3e78)
#13 0x00000000018d73a4 void llvm::detail::UniqueFunctionBase<void, llvm::Expected<std::map<llvm::StringRef, llvm::JITEvaluatedSymbol, std::less<llvm::StringRef>, std::allocator<std::pair<llvm::StringRef const, llvm::JITEvaluatedSymbol> > > > >::CallImpl<llvm::RuntimeDyldImpl::finalizeAsync(std::unique_ptr<llvm::RuntimeDyldImpl, std::default_delete<llvm::RuntimeDyldImpl> >, llvm::unique_function<void (llvm::object::OwningBinary<llvm::object::ObjectFile>, std::unique_ptr<llvm::RuntimeDyld::LoadedObjectInfo, std::default_delete<llvm::RuntimeDyld::LoadedObjectInfo> >, llvm::Error)>, llvm::object::OwningBinary<llvm::object::ObjectFile>, std::unique_ptr<llvm::RuntimeDyld::LoadedObjectInfo, std::default_delete<llvm::RuntimeDyld::LoadedObjectInfo> >)::$_0>(void*, llvm::Expected<std::map<llvm::StringRef, llvm::JITEvaluatedSymbol, std::less<llvm::StringRef>, std::allocator<std::pair<llvm::StringRef const, llvm::JITEvaluatedSymbol> > > >&) (/usr/bin/swift-frontend+0x18d73a4)
#14 0x0000000001877b23 void llvm::detail::UniqueFunctionBase<void, llvm::Expected<llvm::DenseMap<llvm::orc::SymbolStringPtr, llvm::JITEvaluatedSymbol, llvm::DenseMapInfo<llvm::orc::SymbolStringPtr>, llvm::detail::DenseMapPair<llvm::orc::SymbolStringPtr, llvm::JITEvaluatedSymbol> > > >::CallImpl<(anonymous namespace)::JITDylibSearchOrderResolver::lookup(std::set<llvm::StringRef, std::less<llvm::StringRef>, std::allocator<llvm::StringRef> > const&, llvm::unique_function<void (llvm::Expected<std::map<llvm::StringRef, llvm::JITEvaluatedSymbol, std::less<llvm::StringRef>, std::allocator<std::pair<llvm::StringRef const, llvm::JITEvaluatedSymbol> > > >)>)::{lambda(llvm::Expected<llvm::DenseMap<llvm::orc::SymbolStringPtr, llvm::JITEvaluatedSymbol, llvm::DenseMapInfo<llvm::orc::SymbolStringPtr>, llvm::detail::DenseMapPair<llvm::orc::SymbolStringPtr, llvm::JITEvaluatedSymbol> > >)#1}>(void*, llvm::Expected<llvm::DenseMap<llvm::orc::SymbolStringPtr, llvm::JITEvaluatedSymbol, llvm::DenseMapInfo<llvm::orc::SymbolStringPtr>, llvm::detail::DenseMapPair<llvm::orc::SymbolStringPtr, llvm::JITEvaluatedSymbol> > >&) (/usr/bin/swift-frontend+0x1877b23)
#15 0x000000000183cc07 llvm::orc::AsynchronousSymbolQuery::handleComplete(llvm::orc::ExecutionSession&)::RunQueryCompleteTask::run() (/usr/bin/swift-frontend+0x183cc07)
#16 0x000000000183bca7 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> >)>(void*, std::unique_ptr<llvm::orc::Task, std::default_delete<llvm::orc::Task> >&) (/usr/bin/swift-frontend+0x183bca7)
#17 0x0000000001815126 llvm::orc::AsynchronousSymbolQuery::handleComplete(llvm::orc::ExecutionSession&) (/usr/bin/swift-frontend+0x1815126)
#18 0x000000000181f63a llvm::orc::JITDylib::resolve(llvm::orc::MaterializationResponsibility&, llvm::DenseMap<llvm::orc::SymbolStringPtr, llvm::JITEvaluatedSymbol, llvm::DenseMapInfo<llvm::orc::SymbolStringPtr>, llvm::detail::DenseMapPair<llvm::orc::SymbolStringPtr, llvm::JITEvaluatedSymbol> > const&) (/usr/bin/swift-frontend+0x181f63a)
#19 0x0000000001833654 llvm::orc::ExecutionSession::OL_notifyResolved(llvm::orc::MaterializationResponsibility&, llvm::DenseMap<llvm::orc::SymbolStringPtr, llvm::JITEvaluatedSymbol, llvm::DenseMapInfo<llvm::orc::SymbolStringPtr>, llvm::detail::DenseMapPair<llvm::orc::SymbolStringPtr, llvm::JITEvaluatedSymbol> > const&) (/usr/bin/swift-frontend+0x1833654)
#20 0x000000000181639c llvm::orc::AbsoluteSymbolsMaterializationUnit::materialize(std::unique_ptr<llvm::orc::MaterializationResponsibility, std::default_delete<llvm::orc::MaterializationResponsibility> >) (/usr/bin/swift-frontend+0x181639c)
#21 0x000000000182a96b llvm::orc::MaterializationTask::run() (/usr/bin/swift-frontend+0x182a96b)
#22 0x000000000183bca7 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> >)>(void*, std::unique_ptr<llvm::orc::Task, std::default_delete<llvm::orc::Task> >&) (/usr/bin/swift-frontend+0x183bca7)
#23 0x000000000182c3a7 llvm::orc::ExecutionSession::dispatchOutstandingMUs() (/usr/bin/swift-frontend+0x182c3a7)
#24 0x00000000018314a6 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*, llvm::DenseSet<llvm::orc::SymbolStringPtr, llvm::DenseMapInfo<llvm::orc::SymbolStringPtr> > > > const&)>) (/usr/bin/swift-frontend+0x18314a6)
#25 0x0000000001844fb9 llvm::orc::InProgressFullLookupState::complete(std::unique_ptr<llvm::orc::InProgressLookupState, std::default_delete<llvm::orc::InProgressLookupState> >) (/usr/bin/swift-frontend+0x1844fb9)
#26 0x000000000181c2c8 llvm::orc::ExecutionSession::OL_applyQueryPhase1(std::unique_ptr<llvm::orc::InProgressLookupState, std::default_delete<llvm::orc::InProgressLookupState> >, llvm::Error) (/usr/bin/swift-frontend+0x181c2c8)
#27 0x0000000001818a4a 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::JITDylibLookupFlags> > > 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::detail::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::DenseMapInfo<llvm::orc::JITDylib*>, llvm::detail::DenseMapPair<llvm::orc::JITDylib*, llvm::DenseSet<llvm::orc::SymbolStringPtr, llvm::DenseMapInfo<llvm::orc::SymbolStringPtr> > > > const&)>) (/usr/bin/swift-frontend+0x1818a4a)
#28 0x00000000018771c1 (anonymous namespace)::JITDylibSearchOrderResolver::lookup(std::set<llvm::StringRef, std::less<llvm::StringRef>, std::allocator<llvm::StringRef> > const&, llvm::unique_function<void (llvm::Expected<std::map<llvm::StringRef, llvm::JITEvaluatedSymbol, std::less<llvm::StringRef>, std::allocator<std::pair<llvm::StringRef const, llvm::JITEvaluatedSymbol> > > >)>) (/usr/bin/swift-frontend+0x18771c1)
#29 0x00000000018d398f llvm::RuntimeDyldImpl::finalizeAsync(std::unique_ptr<llvm::RuntimeDyldImpl, std::default_delete<llvm::RuntimeDyldImpl> >, llvm::unique_function<void (llvm::object::OwningBinary<llvm::object::ObjectFile>, std::unique_ptr<llvm::RuntimeDyld::LoadedObjectInfo, std::default_delete<llvm::RuntimeDyld::LoadedObjectInfo> >, llvm::Error)>, llvm::object::OwningBinary<llvm::object::ObjectFile>, std::unique_ptr<llvm::RuntimeDyld::LoadedObjectInfo, std::default_delete<llvm::RuntimeDyld::LoadedObjectInfo> >) (/usr/bin/swift-frontend+0x18d398f)
#30 0x00000000018d5137 llvm::jitLinkForORC(llvm::object::OwningBinary<llvm::object::ObjectFile>, llvm::RuntimeDyld::MemoryManager&, llvm::JITSymbolResolver&, bool, llvm::unique_function<llvm::Error (llvm::object::ObjectFile const&, llvm::RuntimeDyld::LoadedObjectInfo&, std::map<llvm::StringRef, llvm::JITEvaluatedSymbol, std::less<llvm::StringRef>, std::allocator<std::pair<llvm::StringRef const, llvm::JITEvaluatedSymbol> > >)>, llvm::unique_function<void (llvm::object::OwningBinary<llvm::object::ObjectFile>, std::unique_ptr<llvm::RuntimeDyld::LoadedObjectInfo, std::default_delete<llvm::RuntimeDyld::LoadedObjectInfo> >, llvm::Error)>) (/usr/bin/swift-frontend+0x18d5137)
#31 0x0000000001874695 llvm::orc::RTDyldObjectLinkingLayer::emit(std::unique_ptr<llvm::orc::MaterializationResponsibility, std::default_delete<llvm::orc::MaterializationResponsibility> >, std::unique_ptr<llvm::MemoryBuffer, std::default_delete<llvm::MemoryBuffer> >) (/usr/bin/swift-frontend+0x1874695)
#32 0x0000000001873ad5 llvm::orc::ObjectTransformLayer::emit(std::unique_ptr<llvm::orc::MaterializationResponsibility, std::default_delete<llvm::orc::MaterializationResponsibility> >, std::unique_ptr<llvm::MemoryBuffer, std::default_delete<llvm::MemoryBuffer> >) (/usr/bin/swift-frontend+0x1873ad5)
#33 0x0000000001896a9a llvm::orc::IRCompileLayer::emit(std::unique_ptr<llvm::orc::MaterializationResponsibility, std::default_delete<llvm::orc::MaterializationResponsibility> >, llvm::orc::ThreadSafeModule) (/usr/bin/swift-frontend+0x1896a9a)
#34 0x0000000001897200 llvm::orc::IRTransformLayer::emit(std::unique_ptr<llvm::orc::MaterializationResponsibility, std::default_delete<llvm::orc::MaterializationResponsibility> >, llvm::orc::ThreadSafeModule) (/usr/bin/swift-frontend+0x1897200)
#35 0x0000000001897200 llvm::orc::IRTransformLayer::emit(std::unique_ptr<llvm::orc::MaterializationResponsibility, std::default_delete<llvm::orc::MaterializationResponsibility> >, llvm::orc::ThreadSafeModule) (/usr/bin/swift-frontend+0x1897200)
#36 0x000000000189e4a7 llvm::orc::BasicIRLayerMaterializationUnit::materialize(std::unique_ptr<llvm::orc::MaterializationResponsibility, std::default_delete<llvm::orc::MaterializationResponsibility> >) (/usr/bin/swift-frontend+0x189e4a7)
#37 0x000000000182a96b llvm::orc::MaterializationTask::run() (/usr/bin/swift-frontend+0x182a96b)
#38 0x000000000183bca7 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> >)>(void*, std::unique_ptr<llvm::orc::Task, std::default_delete<llvm::orc::Task> >&) (/usr/bin/swift-frontend+0x183bca7)
#39 0x000000000182c3a7 llvm::orc::ExecutionSession::dispatchOutstandingMUs() (/usr/bin/swift-frontend+0x182c3a7)
#40 0x00000000018314a6 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*, llvm::DenseSet<llvm::orc::SymbolStringPtr, llvm::DenseMapInfo<llvm::orc::SymbolStringPtr> > > > const&)>) (/usr/bin/swift-frontend+0x18314a6)
#41 0x0000000001844fb9 llvm::orc::InProgressFullLookupState::complete(std::unique_ptr<llvm::orc::InProgressLookupState, std::default_delete<llvm::orc::InProgressLookupState> >) (/usr/bin/swift-frontend+0x1844fb9)
#42 0x000000000181c2c8 llvm::orc::ExecutionSession::OL_applyQueryPhase1(std::unique_ptr<llvm::orc::InProgressLookupState, std::default_delete<llvm::orc::InProgressLookupState> >, llvm::Error) (/usr/bin/swift-frontend+0x181c2c8)
#43 0x0000000001818a4a 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::JITDylibLookupFlags> > > 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::detail::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::DenseMapInfo<llvm::orc::JITDylib*>, llvm::detail::DenseMapPair<llvm::orc::JITDylib*, llvm::DenseSet<llvm::orc::SymbolStringPtr, llvm::DenseMapInfo<llvm::orc::SymbolStringPtr> > > > const&)>) (/usr/bin/swift-frontend+0x1818a4a)
#44 0x000000000182c95b 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::orc::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::DenseMapInfo<llvm::orc::JITDylib*>, llvm::detail::DenseMapPair<llvm::orc::JITDylib*, llvm::DenseSet<llvm::orc::SymbolStringPtr, llvm::DenseMapInfo<llvm::orc::SymbolStringPtr> > > > const&)>) (/usr/bin/swift-frontend+0x182c95b)
#45 0x000000000182ceea 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::orc::SymbolStringPtr, llvm::orc::SymbolState) (/usr/bin/swift-frontend+0x182ceea)
#46 0x0000000001852da3 llvm::orc::LLJIT::lookupLinkerMangled(llvm::orc::JITDylib&, llvm::orc::SymbolStringPtr) (/usr/bin/swift-frontend+0x1852da3)
#47 0x00000000008ccd26 swift::RunImmediately(swift::CompilerInstance&, std::vector<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::allocator<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > > > const&, swift::IRGenOptions const&, swift::SILOptions const&, std::unique_ptr<swift::SILModule, std::default_delete<swift::SILModule> >&&) (/usr/bin/swift-frontend+0x8ccd26)
#48 0x00000000006036b2 performCompileStepsPostSILGen(swift::CompilerInstance&, std::unique_ptr<swift::SILModule, std::default_delete<swift::SILModule> >, llvm::PointerUnion<swift::ModuleDecl*, swift::SourceFile*>, swift::PrimarySpecificPaths const&, int&, swift::FrontendObserver*) (/usr/bin/swift-frontend+0x6036b2)
#49 0x0000000000602bb0 swift::performCompileStepsPostSema(swift::CompilerInstance&, int&, swift::FrontendObserver*) (/usr/bin/swift-frontend+0x602bb0)
#50 0x00000000006054aa swift::performFrontend(llvm::ArrayRef<char const*>, char const*, void*, swift::FrontendObserver*) (/usr/bin/swift-frontend+0x6054aa)
#51 0x00000000004be5b7 swift::mainEntry(int, char const**) (/usr/bin/swift-frontend+0x4be5b7)
#52 0x0000004002668c87 __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x21c87)
#53 0x00000000004bcf5a _start (/usr/bin/swift-frontend+0x4bcf5a)
qemu: uncaught target signal 6 (Aborted) - core dumped
Aborted

[c0d1f1ed]

@sonsongithub @kateinoigakukun Please take a look at #64720

[lhames]

I've made some comments on #64720. I think the right solution here is to move to JITLink (which should handle small code model just fine) for ELF/x86-64.

I'll aim to post a small patch tomorrow that will switch to JITLink, but could use a hand testing it as I don't have access to a Linux dev machine.