From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 15784 invoked by alias); 27 May 2010 19:38:01 -0000 Received: (qmail 15775 invoked by uid 22791); 27 May 2010 19:38:00 -0000 X-SWARE-Spam-Status: No, hits=-5.8 required=5.0 tests=AWL,BAYES_00,RCVD_IN_DNSWL_HI,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; Thu, 27 May 2010 19:37:55 +0000 Received: from int-mx08.intmail.prod.int.phx2.redhat.com (int-mx08.intmail.prod.int.phx2.redhat.com [10.5.11.21]) by mx1.redhat.com (8.13.8/8.13.8) with ESMTP id o4RJbkuc005972 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=OK); Thu, 27 May 2010 15:37:46 -0400 Received: from ns3.rdu.redhat.com (ns3.rdu.redhat.com [10.11.255.199]) by int-mx08.intmail.prod.int.phx2.redhat.com (8.13.8/8.13.8) with ESMTP id o4RJbkjw012952; Thu, 27 May 2010 15:37:46 -0400 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 o4RJbjdL023391; Thu, 27 May 2010 15:37:45 -0400 Received: by opsy.redhat.com (Postfix, from userid 500) id 58A8A3780A5; Thu, 27 May 2010 13:37:45 -0600 (MDT) From: Tom Tromey To: Stan Shebs Cc: gdb-patches@sourceware.org Subject: Re: [RFC] Check original contents at tracepoints References: <4BD24BC1.4030103@codesourcery.com> Reply-To: tromey@redhat.com Date: Thu, 27 May 2010 19:45:00 -0000 In-Reply-To: <4BD24BC1.4030103@codesourcery.com> (Stan Shebs's message of "Fri, 23 Apr 2010 18:39:13 -0700") Message-ID: User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/23.1 (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: 2010-05/txt/msg00652.txt.bz2 >>>>> "Stan" == Stan Shebs writes: Stan> So the idea of this patch is to record, at definition time, the Stan> bytes that the tracepoint expects to overwrite when it is Stan> downloaded for the trace run. The agent then compares with what Stan> is currently at that address, and refuses to start the run if Stan> there is any discrepancy. This seems like a reasonable sanity check to me. Stan> Assuming the whole idea has merit, one of the open issues has been to Stan> decide how many bytes to record. I don't have much to add on this front, sorry. Tom