From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 11186 invoked by alias); 13 Jun 2007 09:23:49 -0000 Received: (qmail 11172 invoked by uid 22791); 13 Jun 2007 09:23:48 -0000 X-Spam-Check-By: sourceware.org Received: from ns2.suse.de (HELO mx2.suse.de) (195.135.220.15) by sourceware.org (qpsmtpd/0.31) with ESMTP; Wed, 13 Jun 2007 09:23:46 +0000 Received: from Relay2.suse.de (mail2.suse.de [195.135.221.8]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by mx2.suse.de (Postfix) with ESMTP id 3330921761; Wed, 13 Jun 2007 11:23:44 +0200 (CEST) From: Andreas Schwab To: "Saurabh Thukral" Cc: gdb@sourceware.org Subject: Re: backtrace shows ?? instead of function names in gdb References: <4a4b2c810706130202q35296aadxe139a0e8a305c7e6@mail.gmail.com> X-Yow: I love FRUIT PICKERS!! Date: Wed, 13 Jun 2007 09:23:00 -0000 In-Reply-To: <4a4b2c810706130202q35296aadxe139a0e8a305c7e6@mail.gmail.com> (Saurabh Thukral's message of "Wed\, 13 Jun 2007 14\:32\:23 +0530") Message-ID: User-Agent: Gnus/5.110006 (No Gnus v0.6) Emacs/22.0.97 (gnu/linux) MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Transfer-Encoding: 8bit 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: 2007-06/txt/msg00103.txt.bz2 "Saurabh Thukral" writes: > Hi all, > > While debugging a core file produced by a program, I found the > following backtrace: > #0 0x0000000000000000 in ?? () 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, Maxfeldstraße 5, 90409 Nürnberg, Germany PGP key fingerprint = 58CA 54C7 6D53 942B 1756 01D3 44D5 214B 8276 4ED5 "And now for something completely different."