RE: stabs vs. dwarf-2 clarification

[Jeff Baker <jbaker at qnx dot com>]

Yes, it seems to be related to our antique compiler (2.95.3).  Thanks for
looking.

-----Original Message-----
From: Nick Clifton [mailto:nickc@redhat.com] 
Sent: Monday, April 04, 2005 1:44 PM
To: Jeff Baker
Cc: 'binutils@sourceware.org'
Subject: Re: stabs vs. dwarf-2 clarification

Hi Jeff,

> I have a (hopefully) quick question about the behaviour of stabs as
compared
> to dwarf-2.  I have a small sample app that I build with stabs debugging
and
> link against a static lib that was built with no debugging.  If I use
> addr2line to get the line number for anything from inside the static lib
> with stabs debugging I will get the line number of whatever the previous
> stabs entry is, no matter how far back it has to go.  With dwarf-2 I get
> "??:0".  Is this the way stabs is expected to work?
> 
> I've attached a testcase that shows what I'm talking about.  Modify the
> Makefile to fit your host system, make it and then ask for a line number
> from inside func1.  You should get appprofiler_looper.c:126.

I tried to reproduce this but failed(*).  I was however using the latest 
binutils sources from the CVS repository and I know that Fred Fish has 
been checking patches to fix things in this area, so perhaps that is why.

Cheers
   Nick

(*) failed as in when I was compiling with "-gstabs" I still got "??:0" 
as the lien associated with the address-known-to-be-inside-func1.