[llvm-dev] Assertion fail/crash in X86FrameLowering::GetFrameIndexReference SEH (original) (raw)

Carlo Kok via llvm-dev llvm-dev at lists.llvm.org
Mon Oct 17 23:51:06 PDT 2016

This turned out to be related to reusing the local used in the catchpad, for example given the following c++ code:

extern void rthrow();

int main() { try { try { rthrow(); } catch(int* v) { rthrow(); } } catch (int* v) { rthrow(); } return 0; }

Generates two:

%7 = catchpad within %5 [%rtti.TypeDescriptor4* @"\01??_R0PAH at 8", i32 0, i32** %2] %11 = catchpad within %9 [%rtti.TypeDescriptor4* @"\01??_R0PAH at 8", i32 0, i32** %3]

If I change either of them to have the %2 in both, it crashes llvm.

On 2016-10-17 18:02, Carlo Kok via llvm-dev wrote: > Hi, >> I'm gettign an assertion fail/crash in > X86FrameLowering::GetFrameIndexReference when compiling the following > bitcode: >> https://gist.github.com/carlokok/868cddebeb9acc8ccbac6253de0480b0 >> I tried removing the llvm.frameaddres calls but that's not it, where can > I start looking for what my mistake here is? Code seems to verify just > fine. >>> ; #0 0x00e1afe8 llvm::X86FrameLowering::getFrameIndexReference(class > llvm::MachineFunction const &,int,unsigned int &)const > c:\p\llvm\llvm\lib\target\x86\x86framelowering.cpp:1672:0 > ; #1 0x00f99010 llvm::WinException::getFrameIndexOffset(int,struct > llvm::WinEHFuncInfo const &) > c:\p\llvm\llvm\lib\codegen\asmprinter\winexception.cpp:320:0 > ; #2 0x00f97f75 llvm::WinException::emitCXXFrameHandler3Table(class > llvm::MachineFunction const *,bool) > c:\p\llvm\llvm\lib\codegen\asmprinter\winexception.cpp:805:0 > ; #3 0x00f98e77 llvm::WinException::endFunction(class > llvm::MachineFunction const *) > c:\p\llvm\llvm\lib\codegen\asmprinter\winexception.cpp:146:0 > ; #4 0x00f685f7 llvm::AsmPrinter::EmitFunctionBody(void) > c:\p\llvm\llvm\lib\codegen\asmprinter\asmprinter.cpp:978:0 > ; #5 0x00d307fa llvm::X86AsmPrinter::runOnMachineFunction(class > llvm::MachineFunction &) > c:\p\llvm\llvm\lib\target\x86\x86asmprinter.cpp:73:0 > ; #6 0x01021d1b llvm::MachineFunctionPass::runOnFunction(class > llvm::Function &) c:\p\llvm\llvm\lib\codegen\machinefunctionpass.cpp:64:0 > ; #7 0x011a8f40 llvm::FPPassManager::runOnFunction(class llvm::Function > &) c:\p\llvm\llvm\lib\ir\legacypassmanager.cpp:1522:0 > ; #8 0x011a9083 llvm::FPPassManager::runOnModule(class llvm::Module &) > c:\p\llvm\llvm\lib\ir\legacypassmanager.cpp:1542:0 > ; #9 0x011a9202 `anonymous namespace'::MPPassManager::runOnModule > c:\p\llvm\llvm\lib\ir\legacypassmanager.cpp:1599:0 > ; #10 0x011a8b49 llvm::legacy::PassManagerImpl::run(class llvm::Module > &) c:\p\llvm\llvm\lib\ir\legacypassmanager.cpp:1703:0 > ; #11 0x00aee750 compileModule c:\p\llvm\llvm\tools\llc\llc.cpp:508:0 > ; #12 0x00af2e2a main c:\p\llvm\llvm\tools\llc\llc.cpp:273:0 > ; #13 0x015b7e28 scrtcommonmainseh > f:\dd\vctools\crt\vcstartup\src\startup\execommon.inl:253:0 > ; #14 0x769e62c4 (C:\WINDOWS\System32\KERNEL32.DLL+0x162c4) > ; #15 0x772f0609 (C:\WINDOWS\SYSTEM32\ntdll.dll+0x60609) > ; #16 0x772f05d4 (C:\WINDOWS\SYSTEM32\ntdll.dll+0x605d4) >>> bitcode: https://gist.github.com/carlokok/868cddebeb9acc8ccbac6253de0480b0 >

Carlo Kok RemObjects Software

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