From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 12158 invoked by alias); 8 Mar 2011 19:54:45 -0000 Received: (qmail 12060 invoked by uid 22791); 8 Mar 2011 19:54:44 -0000 X-SWARE-Spam-Status: No, hits=-6.8 required=5.0 tests=AWL,BAYES_00,RCVD_IN_DNSWL_HI,SPF_HELO_PASS,TW_EG,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, 08 Mar 2011 19:54:39 +0000 Received: from int-mx12.intmail.prod.int.phx2.redhat.com (int-mx12.intmail.prod.int.phx2.redhat.com [10.5.11.25]) by mx1.redhat.com (8.14.4/8.14.4) with ESMTP id p28JsXge001989 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=OK); Tue, 8 Mar 2011 14:54:33 -0500 Received: from ns3.rdu.redhat.com (ns3.rdu.redhat.com [10.11.255.199]) by int-mx12.intmail.prod.int.phx2.redhat.com (8.14.4/8.14.4) with ESMTP id p28JsW8J020181; Tue, 8 Mar 2011 14:54:32 -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 p28JsWXL024721; Tue, 8 Mar 2011 14:54:32 -0500 Received: by opsy.redhat.com (Postfix, from userid 500) id BC8AC3782A7; Tue, 8 Mar 2011 12:54:31 -0700 (MST) From: Tom Tromey To: Pedro Alves Cc: gdb-patches@sourceware.org, Jan Kratochvil Subject: Re: RFC: lazily call save_current_space_and_thread References: <201103081723.11974.pedro@codesourcery.com> <201103081802.35770.pedro@codesourcery.com> Date: Tue, 08 Mar 2011 20:01:00 -0000 In-Reply-To: <201103081802.35770.pedro@codesourcery.com> (Pedro Alves's message of "Tue, 8 Mar 2011 18:02:35 +0000") 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: 2011-03/txt/msg00569.txt.bz2 >>>>> "Pedro" == Pedro Alves writes: Pedro> Okay. In any case, what I was aluding to, is that Pedro> in non-stop mode gdb is making sure the user selected Pedro> frame is constant between events (fetch_inferior_event), Pedro> so in that case, there's a selected frame to restore back Pedro> to. But thinking a bit more, that obviously doesn't matter Pedro> because if the user had a frame selected, then the debug info Pedro> for that frame has already been read anyway, and there's nothing Pedro> to optimize. Also, this code will still do the right thing if there actually is a selected frame. Moving the selected frame to be per-thread would also help here. But I am going to guess that this is tricky, for the same reasons that making the regcache per-thread is tricky. Pedro> Error in re-setting breakpoint 1: Cannot access memory at address 0x45e22a Pedro> Error in re-setting breakpoint 2: Cannot access memory at address 0x4e2e5a Pedro> warning: Error removing breakpoint 1 Pedro> warning: Error removing breakpoint 2 I didn't run into this, but I have seen other weird things, like errors from libpthread_db. I haven't investigated yet. Tom