From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 8392 invoked by alias); 23 Apr 2003 03:07:48 -0000 Mailing-List: contact gdb-patches-help@sources.redhat.com; run by ezmlm Precedence: bulk List-Subscribe: List-Archive: List-Post: List-Help: , Sender: gdb-patches-owner@sources.redhat.com Received: (qmail 8380 invoked from network); 23 Apr 2003 03:07:48 -0000 Received: from unknown (HELO crack.them.org) (65.125.64.184) by sources.redhat.com with SMTP; 23 Apr 2003 03:07:48 -0000 Received: from nevyn.them.org ([66.93.61.169] ident=mail) by crack.them.org with asmtp (Exim 3.12 #1 (Debian)) id 1989oL-0005cC-00; Tue, 22 Apr 2003 21:16:38 -0500 Received: from drow by nevyn.them.org with local (Exim 3.36 #1 (Debian)) id 1989o1-0003d0-00; Tue, 22 Apr 2003 22:16:17 -0400 Date: Wed, 23 Apr 2003 09:37:00 -0000 From: Daniel Jacobowitz To: Michael Snyder Cc: gdb-patches@sources.redhat.com Subject: Re: crasher in dwarf2loc.c Message-ID: <20030423021617.GB13849@nevyn.them.org> Mail-Followup-To: Michael Snyder , gdb-patches@sources.redhat.com References: <3EA5E370.F069D062@redhat.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <3EA5E370.F069D062@redhat.com> User-Agent: Mutt/1.5.1i X-SW-Source: 2003-04/txt/msg00432.txt.bz2 On Tue, Apr 22, 2003 at 05:50:56PM -0700, Michael Snyder wrote: > Hey Daniel, > > I've got a core dump coming from dwarf_expr_frame_base. > First you call get_frame_function, and then you immediately > use its return value. But get_frame_function can return zero, > so I think you need to check for zero before using it. > > Michael Just to avoid the crash, you're probably right. > PS: more details: get_frame_block returns zero, because > frame_address_in_block returns a pc that is not in any block. > > The crash occurs while running recurse.exp, when we have a > watchpoint on a local variable in an inner frame, and we > continue -- so I don't know the exact context; but I'm > willing to bet that it is trying to evaluate the local > variable after the stack frame has been destroyed. Huh - we should not even be reaching this code. I don't quite understand your explanation; what target does this happen? Can it be reproduced on a simulator, or something of that ilk? -- Daniel Jacobowitz MontaVista Software Debian GNU/Linux Developer