llvm dev - Jan 2010 - [LLVMdev] Question about llvm::dbg()

Maybe I miss something but I think there is a problem with this code in
Support/Debug.cpp when compiling in Release build (NDEBUG defined):

namespace llvm {
  /// dbgs - Return dbgs().
  raw_ostream &dbgs() {
    return dbgs();
  }
}

I though it would crash with a stack overflow due to infinite recursion, but
llvm-gcc is smart enough to compile it as a jmp and create an infinite loop
instead

otool -tv Debug.o

llvm::dbgs():
0000000000000000	pushq	%rbp
0000000000000001	movq	%rsp,%rbp
0000000000000004	jmp	0x00000004

Anyway, I think neither crash nor infinite loop is the expected behavior,
isn't it ?

-- Jean-Daniel

On Tuesday 19 January 2010 16:18, Jean-Daniel Dupas
wrote:
> Maybe I miss something but I think there is a problem with this code in
> Support/Debug.cpp when compiling in Release build (NDEBUG defined):
>
> namespace llvm {
>   /// dbgs - Return dbgs().
>   raw_ostream &dbgs() {
>     return dbgs();
>   }
> }
I'll fix this.

                              -Dave