https://bugs.llvm.org/show_bug.cgi?id=37161
Bug ID: 37161
Summary: clang-cl triggers ASTContext::getASTRecordLayout
Assertion `D && "Cannot get layout of forward
declarations!"'
Product: clang
Version: trunk
Hardware: PC
OS: Linux
Status: NEW
Severity: enhancement
Priority: P
Component: -New Bugs
Assignee: unassignedclangb...@nondot.org
Reporter: stephan.bergmann.second...@googlemail.com
CC: llvm-bugs@lists.llvm.org
At least with recent trunk:
> $ cat test.cc
> template<typename> struct T {};
> struct B1 { virtual T<void> f() = 0; };
> struct B2 { virtual T<void> f() = 0; };
> struct S: B1, B2 { T<void> f(); };
> void f() { new S; }
>
> $ clang -cc1 -triple x86_64-pc-windows-msvc19.0.0 -emit-obj test.cc
> clang: clang/lib/AST/RecordLayoutBuilder.cpp:2962: const
> clang::ASTRecordLayout& clang::ASTContext::getASTRecordLayout(const
> clang::RecordDecl*) const: Assertion `D && "Cannot get layout of forward
> declarations!"' failed.
> Stack dump:
> 0. Program arguments: clang -cc1 -triple x86_64-pc-windows-msvc19.0.0
> -emit-obj test.cc
> 1. <eof> parser at end of file
> 2. Per-file LLVM IR generation
> #0 0x0000000004000f4a llvm::sys::PrintStackTrace(llvm::raw_ostream&)
> llvm/lib/Support/Unix/Signals.inc:398:0
> #1 0x0000000004000fdd PrintStackTraceSignalHandler(void*)
> llvm/lib/Support/Unix/Signals.inc:462:0
> #2 0x0000000003fff482 llvm::sys::RunSignalHandlers()
> llvm/lib/Support/Signals.cpp:49:0
> #3 0x00000000040008bf SignalHandler(int)
> llvm/lib/Support/Unix/Signals.inc:252:0
> #4 0x00007fb3767861b0 __restore_rt (/lib64/libpthread.so.0+0x121b0)
> #5 0x00007fb3752ba660 __GI_raise
> /usr/src/debug/glibc-2.26-146-gd300041c53/signal/../sysdeps/unix/sysv/linux/raise.c:51:0
> #6 0x00007fb3752bbc41 __GI_abort
> /usr/src/debug/glibc-2.26-146-gd300041c53/stdlib/abort.c:81:0
> #7 0x00007fb3752b2f7a __assert_fail_base
> /usr/src/debug/glibc-2.26-146-gd300041c53/assert/assert.c:89:0
> #8 0x00007fb3752b2ff2 (/lib64/libc.so.6+0x2cff2)
> #9 0x00000000070240c0 clang::ASTContext::getASTRecordLayout(clang::RecordDecl
> const*) const clang/lib/AST/RecordLayoutBuilder.cpp:2963:0
> #10 0x0000000006d87e2b clang::ASTContext::getTypeInfoImpl(clang::Type const*)
> const clang/lib/AST/ASTContext.cpp:1901:0
> #11 0x0000000006d86e85 clang::ASTContext::getTypeInfo(clang::Type const*)
> const clang/lib/AST/ASTContext.cpp:1652:0
> #12 0x0000000006d871a3 clang::ASTContext::getTypeInfoImpl(clang::Type const*)
> const clang/include/clang/AST/TypeNodes.def:99:0
> #13 0x0000000006d86e85 clang::ASTContext::getTypeInfo(clang::Type const*)
> const clang/lib/AST/ASTContext.cpp:1652:0
> #14 0x00000000042ebeb0 clang::ASTContext::getTypeInfo(clang::QualType) const
> clang/include/clang/AST/ASTContext.h:2016:0
> #15 0x0000000004578923 clang::ASTContext::getTypeAlign(clang::QualType) const
> clang/include/clang/AST/ASTContext.h:2043:0
> #16 0x0000000006d88527
> clang::ASTContext::getTypeAlignInChars(clang::QualType) const
> clang/lib/AST/ASTContext.cpp:2013:0
> #17 0x000000000468a56e
> clang::CodeGen::CodeGenFunction::CreateIRTemp(clang::QualType, llvm::Twine
> const&) clang/lib/CodeGen/CGExpr.cpp:123:0
> #18 0x00000000043af7de
> clang::CodeGen::CodeGenFunction::StartFunction(clang::GlobalDecl,
> clang::QualType, llvm::Function*, clang::CodeGen::CGFunctionInfo const&,
> clang::CodeGen::FunctionArgList const&, clang::SourceLocation,
> clang::SourceLocation) clang/lib/CodeGen/CodeGenFunction.cpp:1078:0
> #19 0x000000000439d978
> clang::CodeGen::CodeGenFunction::StartThunk(llvm::Function*,
> clang::GlobalDecl, clang::CodeGen::CGFunctionInfo const&, bool)
> clang/lib/CodeGen/CGVTables.cpp:257:0
> #20 0x000000000439eb09
> clang::CodeGen::CodeGenFunction::generateThunk(llvm::Function*,
> clang::CodeGen::CGFunctionInfo const&, clang::GlobalDecl, clang::ThunkInfo
> const&, bool) clang/lib/CodeGen/CGVTables.cpp:433:0
> #21 0x000000000439f2d5
> clang::CodeGen::CodeGenVTables::maybeEmitThunk(clang::GlobalDecl,
> clang::ThunkInfo const&, bool) clang/lib/CodeGen/CGVTables.cpp:561:0
> #22 0x000000000439fac3
> clang::CodeGen::CodeGenVTables::addVTableComponent(clang::CodeGen::ConstantArrayBuilder&,
> clang::VTableLayout const&, unsigned int, llvm::Constant*, unsigned int&)
> clang/lib/CodeGen/CGVTables.cpp:677:0
> #23 0x000000000439fd4e
> clang::CodeGen::CodeGenVTables::createVTableInitializer(clang::CodeGen::ConstantStructBuilder&,
> clang::VTableLayout const&, llvm::Constant*)
> clang/lib/CodeGen/CGVTables.cpp:714:0
> #24 0x0000000004534f7f (anonymous
> namespace)::MicrosoftCXXABI::emitVTableDefinitions(clang::CodeGen::CodeGenVTables&,
> clang::CXXRecordDecl const*) clang/lib/CodeGen/MicrosoftCXXABI.cpp:1656:0
> #25 0x00000000043a0587
> clang::CodeGen::CodeGenVTables::GenerateClassData(clang::CXXRecordDecl
> const*) clang/lib/CodeGen/CGVTables.cpp:892:0
> #26 0x00000000043a0779 clang::CodeGen::CodeGenModule::EmitDeferredVTables()
> clang/lib/CodeGen/CGVTables.cpp:960:0
> #27 0x00000000043ca484 clang::CodeGen::CodeGenModule::EmitDeferred()
> clang/lib/CodeGen/CodeGenModule.cpp:1662:0
> #28 0x00000000043ca645 clang::CodeGen::CodeGenModule::EmitDeferred()
> clang/lib/CodeGen/CodeGenModule.cpp:1708:0
> #29 0x00000000043c3448 clang::CodeGen::CodeGenModule::Release()
> clang/lib/CodeGen/CodeGenModule.cpp:393:0
> #30 0x0000000004fff067 (anonymous
> namespace)::CodeGeneratorImpl::HandleTranslationUnit(clang::ASTContext&)
> clang/lib/CodeGen/ModuleBuilder.cpp:269:0
> #31 0x0000000004ff8f56
> clang::BackendConsumer::HandleTranslationUnit(clang::ASTContext&)
> clang/lib/CodeGen/CodeGenAction.cpp:238:0
> #32 0x0000000005efcbfd clang::ParseAST(clang::Sema&, bool, bool)
> clang/lib/Parse/ParseAST.cpp:171:0
> #33 0x0000000004985e4b clang::ASTFrontendAction::ExecuteAction()
> clang/lib/Frontend/FrontendAction.cpp:1005:0
> #34 0x0000000004ff74f2 clang::CodeGenAction::ExecuteAction()
> clang/lib/CodeGen/CodeGenAction.cpp:1044:0
> #35 0x0000000004985875 clang::FrontendAction::Execute()
> clang/lib/Frontend/FrontendAction.cpp:908:0
> #36 0x0000000004918987
> clang::CompilerInstance::ExecuteAction(clang::FrontendAction&)
> clang/lib/Frontend/CompilerInstance.cpp:990:0
> #37 0x0000000004acd0f6
> clang::ExecuteCompilerInvocation(clang::CompilerInstance*)
> clang/lib/FrontendTool/ExecuteCompilerInvocation.cpp:255:0
> #38 0x0000000001e32681 cc1_main(llvm::ArrayRef<char const*>, char const*,
> void*) clang/tools/driver/cc1_main.cpp:221:0
> #39 0x0000000001e2850d ExecuteCC1Tool(llvm::ArrayRef<char const*>,
> llvm::StringRef) clang/tools/driver/driver.cpp:311:0
> #40 0x0000000001e29178 main clang/tools/driver/driver.cpp:383:0
(resp. a following null-pointer deref crash when built without assertions).
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