From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 16639 invoked by alias); 8 Sep 2008 13:46:57 -0000 Received: (qmail 16631 invoked by uid 22791); 8 Sep 2008 13:46:56 -0000 X-Spam-Check-By: sourceware.org Received: from relay-pt1.poste.it (HELO relay-pt1.poste.it) (62.241.4.164) by sourceware.org (qpsmtpd/0.31) with ESMTP; Mon, 08 Sep 2008 13:45:57 +0000 Received: from geppetto.reilabs.com (212.123.91.176) by relay-pt1.poste.it (7.3.122) (authenticated as stefano.sabatini-lala@poste.it) id 48C46B47000058B0 for gdb@sources.redhat.com; Mon, 8 Sep 2008 15:45:54 +0200 Received: from stefano by geppetto.reilabs.com with local (Exim 4.67) (envelope-from ) id 1Kch38-0005Jg-5P for gdb@sources.redhat.com; Mon, 08 Sep 2008 15:45:02 +0200 Date: Mon, 08 Sep 2008 13:46:00 -0000 From: Stefano Sabatini To: gdb Mailing List Subject: Re: Single stepping and "no line information" Message-ID: <20080908134502.GB19559@geppetto> Mail-Followup-To: gdb Mailing List References: <20080908133953.GA19559@geppetto> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20080908133953.GA19559@geppetto> User-Agent: Mutt/1.5.18 (2008-05-17) X-IsSubscribed: yes Mailing-List: contact gdb-help@sourceware.org; run by ezmlm Precedence: bulk List-Id: List-Subscribe: List-Archive: List-Post: List-Help: , Sender: gdb-owner@sourceware.org X-SW-Source: 2008-09/txt/msg00044.txt.bz2 On date Monday 2008-09-08 15:39:53 +0200, Stefano Sabatini wrote: > I'm debugging an application which use a shared lib. > > That library has been compiled on my system, and I added to the CFLAGS > used the -ggdb -O0 flags, so I'm quite sure that lib should contain > the source line symbol informations. > > Nonetheless when I try to step into the library functions I get: > > (gdb) s > Single stepping until exit from function su_clone_start, > which has no line number information. > > stefano@geppetto ~/s/ptlib> gdb --version > GNU gdb 6.8-debian > Copyright (C) 2008 Free Software Foundation, Inc. > License GPLv3+: GNU GPL version 3 or later > This is free software: you are free to change and redistribute it. > There is NO WARRANTY, to the extent permitted by law. Type "show copying" > and "show warranty" for details. > This GDB was configured as "i486-linux-gnu". > > Why gdb can't find the source line informations? > > How can I verify (e.g. with a commandline tool) wether that > information is present directly analyzing the library files? I tried with: nm --line-numbers libfoo.so | grep foo and indeed I get the symbol with its line and file information. Could it be a gdb bug? Regards.