From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 22551 invoked by alias); 1 Jun 2012 17:37:42 -0000 Received: (qmail 22537 invoked by uid 22791); 1 Jun 2012 17:37:41 -0000 X-SWARE-Spam-Status: No, hits=-7.5 required=5.0 tests=AWL,BAYES_00,KHOP_RCVD_UNTRUST,KHOP_THREADED,RCVD_IN_DNSWL_HI,RCVD_IN_HOSTKARMA_W,SPF_HELO_PASS,T_RP_MATCHES_RCVD X-Spam-Check-By: sourceware.org Received: from mx1.redhat.com (HELO mx1.redhat.com) (209.132.183.28) by sourceware.org (qpsmtpd/0.43rc1) with ESMTP; Fri, 01 Jun 2012 17:37:25 +0000 Received: from int-mx09.intmail.prod.int.phx2.redhat.com (int-mx09.intmail.prod.int.phx2.redhat.com [10.5.11.22]) by mx1.redhat.com (8.14.4/8.14.4) with ESMTP id q51HbORG000354 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=OK); Fri, 1 Jun 2012 13:37:24 -0400 Received: from [127.0.0.1] (ovpn01.gateway.prod.ext.ams2.redhat.com [10.39.146.11]) by int-mx09.intmail.prod.int.phx2.redhat.com (8.14.4/8.14.4) with ESMTP id q51HbMS8022673; Fri, 1 Jun 2012 13:37:23 -0400 Message-ID: <4FC8FDD2.7060407@redhat.com> Date: Fri, 01 Jun 2012 17:37:00 -0000 From: Pedro Alves User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:12.0) Gecko/20120430 Thunderbird/12.0.1 MIME-Version: 1.0 To: Jan Kratochvil CC: Joakim Tjernlund , gdb-patches@sourceware.org Subject: Re: [PATCH] solib-svr4: Avoid unwanted shlib internal BPs When debugging Linux kernel or u-boot References: <1338562868-22411-1-git-send-email-Joakim.Tjernlund@transmode.se> <4FC8EC08.1060609@redhat.com> <20120601172214.GA21236@host2.jankratochvil.net> In-Reply-To: <20120601172214.GA21236@host2.jankratochvil.net> Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Mailing-List: contact gdb-patches-help@sourceware.org; run by ezmlm Precedence: bulk List-Id: List-Subscribe: List-Archive: List-Post: List-Help: , Sender: gdb-patches-owner@sourceware.org X-SW-Source: 2012-06/txt/msg00024.txt.bz2 On 06/01/2012 06:22 PM, Jan Kratochvil wrote: > On Fri, 01 Jun 2012 18:21:28 +0200, Pedro Alves wrote: >> --- a/gdb/solib-svr4.c >> +++ b/gdb/solib-svr4.c >> @@ -1707,7 +1707,7 @@ enable_break (struct svr4_info *info, int from_tty) >> } >> } >> >> - if (!current_inferior ()->attach_flag) >> + if (interp_name != NULL && !current_inferior ()->attach_flag) >> { >> for (bkpt_namep = bkpt_names; *bkpt_namep != NULL; bkpt_namep++) >> { > > It has a regression in the case below. > > OTOH one has to strip _start to make it a regression as with _start GDB did not > catch startup libraries even before. Yeah, that's a really contrived example. You're relying on stopping at main, not when the DSO is really loaded (_dl_debug_state) to set the breakpoint. I can see _start not existing, with the entry point named something else, but if you strip your static binary to miss _dl_debug_state, you won't get main either. (and then static binaries that dlopen aren't something you'd want to do normally.) -- Pedro Alves