[cfe-dev] Debug Info generation for C language.

[Argiris Kirtzidis]

Hi,

Sanjiv.Gupta at microchip.com wrote:
> We are done with the generation of debug info for C source constructs.
> The changes are checked-in. We have done a little-bit of testing from
> our side, the changes are now ready for further testing. Let us know if
> you encounter any issues. 
>   

It doesn't work at all for me.

When using this test case (t.c):

int main()
{
  return 0;
}

On linux I get an assertion error:

 > clang -g -emit-llvm-bc t.c -o t.bc
 > llc t.bc

llc: /home/argiris/llvm/include/llvm/Support/Casting.h:199: typename 
llvm::cast_retty<To, From>::ret_type llvm::cast(const Y&) [with X = 
llvm::SubprogramDesc, Y = llvm::DebugInfoDesc*]: Assertion `isa<X>(Val) 
&& "cast<Ty>() argument of incompatible type!"' failed.
llc[0x8924be6]
llc[0x8924d18]
[0xb7f6a420]
/lib/i686/libc.so.6(abort+0x101)[0xb7d2f851]
/lib/i686/libc.so.6(__assert_fail+0xfb)[0xb7d2753b]
llc(_ZN4llvm4castINS_14SubprogramDescEPNS_13DebugInfoDescEEENS_10cast_rettyIT_T0_E8ret_typeERKS6_+0x4c)[0x861566c]
llc(_ZN4llvm10DwarfDebug18ConstructRootScopeEPNS_10DebugScopeE+0x29)[0x86c9a8b]
llc(_ZN4llvm10DwarfDebug11EndFunctionEv+0x19c)[0x86c9d8a]
llc(_ZN4llvm11DwarfWriter11EndFunctionEv+0x14)[0x86b19fc]
llc[0x8404bdf]
llc(_ZN4llvm19MachineFunctionPass13runOnFunctionERNS_8FunctionE+0x28)[0x8465822]
llc(_ZN4llvm13FPPassManager13runOnFunctionERNS_8FunctionE+0x13d)[0x88b2913]
llc(_ZN4llvm23FunctionPassManagerImpl3runERNS_8FunctionE+0x6e)[0x88b2b7c]
llc(_ZN4llvm19FunctionPassManager3runERNS_8FunctionE+0x89)[0x88b2ccb]
llc(main+0x9a2)[0x83d65f0]
/lib/i686/libc.so.6(__libc_start_main+0xdc)[0xb7d1b75c]
llc(sinh+0x8d)[0x83d4e21]
Aborted



On windows I don't get an assertion, but gdb reports: "no debugging 
symbols found".

Does anyone else have issues with the debug info ?


-Argiris