<div dir="ltr"><div>Hi!</div><div><p style="font-family:Arial,sans-serif">I am trying to utilize the Orcv2 C API. Everything goes smooth, initialized and well-formed (at least I assert for null pointers everywhere), till the point I try to lookup a symbol with LLVMOrcLLJITLookup: I receive a SIGSEGV.</p><p style="font-family:Arial,sans-serif">Providing the backtrace:</p><p style="font-family:Arial,sans-serif">* thread #1, name = 'tarantool', stop reason = signal SIGSEGV: invalid address (fault address: 0x0)<br>  * frame #0: 0x0000000001a88db0 tarantool`llvm::LLVMContext::getDiagHandlerPtr() const<br>    frame #1: 0x0000000001a959d4 tarantool`llvm::legacy::PassManagerImpl::run(llvm::Module&) + 628<br>    frame #2: 0x0000000000c5fa0e tarantool`llvm::orc::SimpleCompiler::operator()(llvm::Module&) + 366<br>    frame #3: 0x0000000000c6fd4e tarantool`decltype(auto) llvm::orc::ThreadSafeModule::withModuleDo<llvm::orc::IRCompileLayer::IRCompiler&>(llvm::orc::IRCompileLayer::IRCompiler&) + 94<br>    frame #4: 0x0000000000c6fa05 tarantool`llvm::orc::IRCompileLayer::emit(std::unique_ptr<llvm::orc::MaterializationResponsibility, std::default_delete<llvm::orc::MaterializationResponsibility> >, llvm::orc::ThreadSafeModule) + 37<br>    frame #5: 0x0000000000c6fff7 tarantool`llvm::orc::IRTransformLayer::emit(std::unique_ptr<llvm::orc::MaterializationResponsibility, std::default_delete<llvm::orc::MaterializationResponsibility> >, llvm::orc::ThreadSafeModule) + 199<br>    frame #6: 0x0000000000c6fff7 tarantool`llvm::orc::IRTransformLayer::emit(std::unique_ptr<llvm::orc::MaterializationResponsibility, std::default_delete<llvm::orc::MaterializationResponsibility> >, llvm::orc::ThreadSafeModule) + 199<br>    frame #7: 0x0000000000c396a2 tarantool`llvm::orc::BasicIRLayerMaterializationUnit::materialize(std::unique_ptr<llvm::orc::MaterializationResponsibility, std::default_delete<llvm::orc::MaterializationResponsibility> >) + 274<br>    frame #8: 0x0000000000c1fb4b tarantool`llvm::orc::ExecutionSession::materializeOnCurrentThread(std::unique_ptr<llvm::orc::MaterializationUnit, std::default_delete<llvm::orc::MaterializationUnit> >, std::unique_ptr<llvm::orc::MaterializationResponsibility, std::default_delete<llvm::orc::MaterializationResponsibility> >) + 27<br>    frame #9: 0x0000000000c29a61 tarantool`std::_Function_handler<void (std::unique_ptr<llvm::orc::MaterializationUnit, std::default_delete<llvm::orc::MaterializationUnit> >, std::unique_ptr<llvm::orc::MaterializationResponsibility, std::default_delete<llvm::orc::MaterializationResponsibility> >), void (*)(std::unique_ptr<llvm::orc::MaterializationUnit, std::default_delete<llvm::orc::MaterializationUnit> >, std::unique_ptr<llvm::orc::MaterializationResponsibility, std::default_delete<llvm::orc::MaterializationResponsibility> >)>::_M_invoke(std::_Any_data const&, std::unique_ptr<llvm::orc::MaterializationUnit, std::default_delete<llvm::orc::MaterializationUnit> >&&, std::unique_ptr<llvm::orc::MaterializationResponsibility, std::default_delete<llvm::orc::MaterializationResponsibility> >&&) + 49<br>    frame #10: 0x0000000000c20d31 tarantool`llvm::orc::ExecutionSession::dispatchOutstandingMUs() + 353<br>    frame #11: 0x0000000000c23327 tarantool`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&)>) + 4711<br>    frame #12: 0x0000000000c308fb tarantool`llvm::orc::InProgressFullLookupState::complete(std::unique_ptr<llvm::orc::InProgressLookupState, std::default_delete<llvm::orc::InProgressLookupState> >) + 251<br>    frame #13: 0x0000000000c14a0a tarantool`llvm::orc::ExecutionSession::OL_applyQueryPhase1(std::unique_ptr<llvm::orc::InProgressLookupState, std::default_delete<llvm::orc::InProgressLookupState> >, llvm::Error) + 2010<br>    frame #14: 0x0000000000c12c8c tarantool`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&)>) + 556<br>    frame #15: 0x0000000000c20fc6 tarantool`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&)>) + 486<br>    frame #16: 0x0000000000c2154e tarantool`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) + 302<br>    frame #17: 0x0000000000c3b937 tarantool`llvm::orc::LLJIT::lookupLinkerMangled(llvm::orc::JITDylib&, llvm::orc::SymbolStringPtr) + 119<br>    frame #18: 0x0000000000c08b36 tarantool`llvm::orc::LLJIT::lookup(llvm::orc::JITDylib&, llvm::StringRef) + 166<br>    frame #19: 0x0000000000c0770b tarantool`LLVMOrcLLJITLookup + 59<br>    frame #20: 0x0000000000778900 tarantool`llvm_exec_compiled_expr_list(ctx=0x0000000003271510, fn_id=0, vdbe=0x0000000002db9e18) at llvm_jit.c:443:8<br></p><div><p style="font-family:Arial,sans-serif">Apparently, the problem with the segfault is the attempt to access the DiagHandler, though I explicitly set it.<br></p><p style="font-family:Arial,sans-serif">My code can be viewed here:</p><p style="font-family:Arial,sans-serif"><a href="https://github.com/CuriousGeorgiy/tarantool/blob/CuriousGeorgiy/sql-vdbe-jit/src/box/sql/llvm_jit.h" target="_blank">https://github.com/CuriousGeorgiy/tarantool/blob/CuriousGeorgiy/sql-vdbe-jit/src/box/sql/llvm_jit.h</a><br></p><p style="font-family:Arial,sans-serif"><a href="https://github.com/CuriousGeorgiy/tarantool/blob/CuriousGeorgiy/sql-vdbe-jit/src/box/sql/llvm_jit.c" target="_blank">https://github.com/CuriousGeorgiy/tarantool/blob/CuriousGeorgiy/sql-vdbe-jit/src/box/sql/llvm_jit.c</a></p><p style="font-family:Arial,sans-serif">I understand the code I provided may be sophisticated enough, so if there is any additional information or context I can provide that would be helpful, please, let me know.<br></p></div><div>Also, this is my first time communicating via a mailing list, so, please, let me know if I am missing on something.</div></div><div><div dir="ltr" class="gmail_signature" data-smartmail="gmail_signature"><div dir="ltr">Regards,<div>Georgiy Lebedev</div></div></div></div></div>