From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 20601 invoked by alias); 13 Jun 2007 09:35:52 -0000 Received: (qmail 20592 invoked by uid 22791); 13 Jun 2007 09:35:52 -0000 X-Spam-Check-By: sourceware.org Received: from ug-out-1314.google.com (HELO ug-out-1314.google.com) (66.249.92.172) by sourceware.org (qpsmtpd/0.31) with ESMTP; Wed, 13 Jun 2007 09:35:50 +0000 Received: by ug-out-1314.google.com with SMTP id j40so395549ugd for ; Wed, 13 Jun 2007 02:35:47 -0700 (PDT) Received: by 10.82.136.4 with SMTP id j4mr687178bud.1181727347308; Wed, 13 Jun 2007 02:35:47 -0700 (PDT) Received: by 10.82.107.4 with HTTP; Wed, 13 Jun 2007 02:35:47 -0700 (PDT) Message-ID: <4a4b2c810706130235h25dceb5fo23bd78a398ce70df@mail.gmail.com> Date: Wed, 13 Jun 2007 09:35:00 -0000 From: "Saurabh Thukral" To: "Andreas Schwab" Subject: Re: backtrace shows ?? instead of function names in gdb Cc: gdb@sourceware.org In-Reply-To: MIME-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: quoted-printable Content-Disposition: inline References: <4a4b2c810706130202q35296aadxe139a0e8a305c7e6@mail.gmail.com> 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: 2007-06/txt/msg00106.txt.bz2 > > That looks like an indirect call through a NULL function pointer. Never > a valid function, thus it never has a name. > > Andreas. > > -- > Andreas Schwab, SuSE Labs, schwab@suse.de > SuSE Linux Products GmbH, Maxfeldstra=DFe 5, 90409 N=FCrnberg, Germany > PGP key fingerprint =3D 58CA 54C7 6D53 942B 1756 01D3 44D5 214B 8276 4ED5 > "And now for something completely different." > Hi Andreas, Thanks for the prompt response. I will investigate this matter by doing code review. Whether this is the only reason that such a peculiar backtrace is produced ? If you refer to the link given in my original post, the answer posted states several reasons. Saurabh