From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 31403 invoked by alias); 27 Nov 2012 14:40:18 -0000 Received: (qmail 31385 invoked by uid 22791); 27 Nov 2012 14:40:16 -0000 X-SWARE-Spam-Status: No, hits=-7.8 required=5.0 tests=AWL,BAYES_00,KHOP_RCVD_UNTRUST,KHOP_THREADED,RCVD_IN_DNSWL_HI,RCVD_IN_HOSTKARMA_W,RP_MATCHES_RCVD X-Spam-Check-By: sourceware.org Received: from mga01.intel.com (HELO mga01.intel.com) (192.55.52.88) by sourceware.org (qpsmtpd/0.43rc1) with ESMTP; Tue, 27 Nov 2012 14:40:11 +0000 Received: from fmsmga002.fm.intel.com ([10.253.24.26]) by fmsmga101.fm.intel.com with ESMTP; 27 Nov 2012 06:40:11 -0800 X-ExtLoop1: 1 Received: from irsmsx102.ger.corp.intel.com ([163.33.3.155]) by fmsmga002.fm.intel.com with ESMTP; 27 Nov 2012 06:40:09 -0800 Received: from irsmsx151.ger.corp.intel.com (163.33.192.59) by IRSMSX102.ger.corp.intel.com (163.33.3.155) with Microsoft SMTP Server (TLS) id 14.1.355.2; Tue, 27 Nov 2012 14:40:08 +0000 Received: from irsmsx102.ger.corp.intel.com ([169.254.2.95]) by IRSMSX151.ger.corp.intel.com ([169.254.4.21]) with mapi id 14.01.0355.002; Tue, 27 Nov 2012 14:40:07 +0000 From: "Metzger, Markus T" To: Jan Kratochvil CC: "gdb-patches@sourceware.org" , "markus.t.metzger@gmail.com" , "palves@redhat.com" , "tromey@redhat.com" , "kettenis@gnu.org" Subject: RE: [patch v4 00/13] branch tracing support for Atom Date: Tue, 27 Nov 2012 14:40:00 -0000 Message-ID: References: <1354013351-14791-1-git-send-email-markus.t.metzger@intel.com> <20121127131055.GB22431@host2.jankratochvil.net> <20121127143235.GA31270@host2.jankratochvil.net> In-Reply-To: <20121127143235.GA31270@host2.jankratochvil.net> Content-Type: text/plain; charset="us-ascii" MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-IsSubscribed: yes 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: 2012-11/txt/msg00737.txt.bz2 > -----Original Message----- > From: Jan Kratochvil [mailto:jan.kratochvil@redhat.com] > Sent: Tuesday, November 27, 2012 3:33 PM > To: Metzger, Markus T > Cc: gdb-patches@sourceware.org; markus.t.metzger@gmail.com; palves@redhat= .com; tromey@redhat.com; kettenis@gnu.org > Subject: Re: [patch v4 00/13] branch tracing support for Atom >=20 > On Tue, 27 Nov 2012 15:25:39 +0100, Metzger, Markus T wrote: > > I would also expect problems with stepping, since we won't be able to f= ake > > a back trace using branch trace data. I don't expect that commands like > > reverse-next, next, and finish would work without special cases for btr= ace. >=20 > It is true these commands implemented on btrace would need to disassemble= x86* > instructions (like reverse-execution does for the memory recording purpos= e), > as you state backtrace is not available there which they depend upon. > It would be a larger work. >=20 >=20 > > Regarding the btrace list feature, this might be something we may want = to > > add to reverse execution. It gives an overview over the executed code in > > a very compact format. If people find this useful, we could compute > > something similar from the reverse execution history. >=20 > It depends on whether there could be a common internal interface to both. I was talking about adding a new reverse- command to provide a similar list= computed solely from the reverse execution history - without btrace. Regards, Markus. Intel GmbH Dornacher Strasse 1 85622 Feldkirchen/Muenchen, Deutschland Sitz der Gesellschaft: Feldkirchen bei Muenchen Geschaeftsfuehrer: Peter Gleissner, Christian Lamprechter, Hannes Schwadere= r, Douglas Lusk Registergericht: Muenchen HRB 47456 Ust.-IdNr./VAT Registration No.: DE129385895 Citibank Frankfurt a.M. (BLZ 502 109 00) 600119052