[Bug runtime/14026] print_ubacktrace doesn't resolve the symbol name

["adrian.m.negreanu at intel dot com" <sourceware-bugzilla@sourceware.org>]

http://sourceware.org/bugzilla/show_bug.cgi?id=14026

--- Comment #10 from Negreanu Adrian <adrian.m.negreanu at intel dot com> 2012-05-02 14:44:02 UTC ---
(In reply to comment #7)
> (In reply to comment #6)
> > The patch below made it work for me:
> > 
> > 
> > diff --git a/runtime/unwind.c b/runtime/unwind.c
> > index e440177..3ac7f8d 100644
> > --- a/runtime/unwind.c
> > +++ b/runtime/unwind.c
> > @@ -610,7 +610,7 @@ static int processCFI(const u8 *start, const u8 *end,
> > unsigned long targetLoc,
> >                         break;
> >                 }
> >                 dbug_unwind(1, "targetLoc=%lx state->loc=%lx\n", targetLoc,
> > state->loc);
> > -               if (ptr.p8 > end)
> > +               if (ptr.p8 >= end)
> >                         result = 0;
> >                 if (result && targetLoc != 0 && targetLoc < state->loc)
> >                         return 1;
> 
> I am not sure that is correct. In principle ptr being equal to end should be
> fine (see also the last return condition in ProcessCFI). It means we read
> everything, the last instruction and arguments (and nothing more).
> 
> If you hit this case then processCFI () will fail, which will make unwind_frame
> () also fail. So I am somewhat surprised this seems to work for you. Do you
> have debug output for before/after this patch?


You're right.
I used the wrong binary. Sorry for that !
The change that was included was:

                 if (result && targetLoc != 0 && targetLoc < state->loc)
-                         return 1;
+                         //return 1;

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