From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 21459 invoked by alias); 21 May 2014 15:25:28 -0000 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 Received: (qmail 21448 invoked by uid 89); 21 May 2014 15:25:28 -0000 Authentication-Results: sourceware.org; auth=none X-Virus-Found: No X-Spam-SWARE-Status: No, score=-3.2 required=5.0 tests=AWL,BAYES_00,RP_MATCHES_RCVD,SPF_HELO_PASS,SPF_PASS autolearn=ham version=3.3.2 X-HELO: mx1.redhat.com Received: from mx1.redhat.com (HELO mx1.redhat.com) (209.132.183.28) by sourceware.org (qpsmtpd/0.93/v0.84-503-g423c35a) with ESMTP; Wed, 21 May 2014 15:25:27 +0000 Received: from int-mx01.intmail.prod.int.phx2.redhat.com (int-mx01.intmail.prod.int.phx2.redhat.com [10.5.11.11]) by mx1.redhat.com (8.14.4/8.14.4) with ESMTP id s4LFPP9w004262 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=OK); Wed, 21 May 2014 11:25:25 -0400 Received: from barimba (ovpn-113-182.phx2.redhat.com [10.3.113.182]) by int-mx01.intmail.prod.int.phx2.redhat.com (8.13.8/8.13.8) with ESMTP id s4LFPN9t031677 (version=TLSv1/SSLv3 cipher=AES128-SHA bits=128 verify=NO); Wed, 21 May 2014 11:25:24 -0400 From: Tom Tromey To: Don Breazeal Cc: Subject: Re: [PATCH 0/0][REPOST] Exec events in gdbserver on Linux References: <1398885482-8449-1-git-send-email-donb@codesourcery.com> Date: Wed, 21 May 2014 15:25:00 -0000 In-Reply-To: <1398885482-8449-1-git-send-email-donb@codesourcery.com> (Don Breazeal's message of "Wed, 30 Apr 2014 12:17:58 -0700") Message-ID: <87lhtvnogs.fsf@fleche.redhat.com> User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/24.3 (gnu/linux) MIME-Version: 1.0 Content-Type: text/plain X-SW-Source: 2014-05/txt/msg00488.txt.bz2 >>>>> "Don" == Don Breazeal writes: Don> There are a couple of significant aspects to this patch. First, it uses Don> the ptrace extension PTRACE_EVENT_EXIT to detect thread exit, in particular Don> the exit of a thread group leader when a non-leader calls exec. Use of Don> this event was necessary due to a race condition in the two-thread case. Don> It is only used internally; exit events detected this way are not exposed Don> to the user, and exit processing was changed as little as possible. Ok, sorry, I missed this note earlier. I still don't understand why this is needed in gdbserver but not in gdb, though. And I'm still curious about PTRACE_EVENT_EXIT notifying process rather than thread exit. Tom