From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 26466 invoked by alias); 30 Nov 2010 18:23:37 -0000 Received: (qmail 26449 invoked by uid 22791); 30 Nov 2010 18:23:36 -0000 X-SWARE-Spam-Status: No, hits=-6.2 required=5.0 tests=AWL,BAYES_00,RCVD_IN_DNSWL_HI,SPF_HELO_PASS,TW_GJ,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; Tue, 30 Nov 2010 18:23:31 +0000 Received: from int-mx10.intmail.prod.int.phx2.redhat.com (int-mx10.intmail.prod.int.phx2.redhat.com [10.5.11.23]) by mx1.redhat.com (8.13.8/8.13.8) with ESMTP id oAUINTH1020945 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=OK) for ; Tue, 30 Nov 2010 13:23:29 -0500 Received: from ns3.rdu.redhat.com (ns3.rdu.redhat.com [10.11.255.199]) by int-mx10.intmail.prod.int.phx2.redhat.com (8.14.4/8.14.4) with ESMTP id oAUINTsa031826; Tue, 30 Nov 2010 13:23:29 -0500 Received: from opsy.redhat.com (ovpn01.gateway.prod.ext.phx2.redhat.com [10.5.9.1]) by ns3.rdu.redhat.com (8.13.8/8.13.8) with ESMTP id oAUINS6O030620; Tue, 30 Nov 2010 13:23:28 -0500 Received: by opsy.redhat.com (Postfix, from userid 500) id 3CDCF37817F; Tue, 30 Nov 2010 11:23:28 -0700 (MST) From: Tom Tromey To: Jan Kratochvil Cc: gdb-patches@sourceware.org Subject: Re: RFC: next/finish/etc -vs- exceptions References: <20101125075847.GA19270@host0.dyn.jankratochvil.net> Date: Tue, 30 Nov 2010 18:23:00 -0000 In-Reply-To: <20101125075847.GA19270@host0.dyn.jankratochvil.net> (Jan Kratochvil's message of "Thu, 25 Nov 2010 08:58:47 +0100") Message-ID: User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/23.2 (gnu/linux) MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii 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: 2010-11/txt/msg00507.txt.bz2 >>>>> "Jan" == Jan Kratochvil writes: Jan> continuation_free_args is NULL here but I think the breakpoint Jan> should get deleted even if there is some premature thread deletion. Jan> But maybe just all the breakpoints specific for that thread Jan> (clear_thread_inferior_resources) should be deleted which would Jan> also solve this problem? It turns out there is a bug here in CVS gdb, with longjmp breakpoints. Consider the appended program. Set a breakpoint in thr_func, run, then "next". I get: (gdb) n Warning: Cannot insert breakpoint 0. Error accessing memory address 0x83f4375: Input/output error. 0x00757b01 in __libc_siglongjmp (env=0xb7fd8444, val=1) at longjmp.c:30 30 { I'm looking into it some more. Tom #include void throwit () { // throw 1; pthread_exit ((void*) "lo"); } void * thr_func (void *) { try { throwit (); } catch (int x) { return (void*) "hi bob"; } return NULL; } int main () { pthread_t thread; void *r; pthread_create (&thread, NULL, thr_func, NULL); pthread_join (thread, &r); }