From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-10.3 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,MENTIONS_GIT_HOSTING, NICE_REPLY_A,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_SANE_1 autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 8B962C43463 for ; Mon, 21 Sep 2020 06:49:40 +0000 (UTC) Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id BCAB4207BC for ; Mon, 21 Sep 2020 06:49:39 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org BCAB4207BC Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=ispras.ru Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Received: from localhost ([::1]:40584 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1kKFdq-0002BB-Re for qemu-devel@archiver.kernel.org; Mon, 21 Sep 2020 02:49:38 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:53802) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1kKFdJ-0001gA-9i for qemu-devel@nongnu.org; Mon, 21 Sep 2020 02:49:05 -0400 Received: from mail.ispras.ru ([83.149.199.84]:36382) by eggs.gnu.org with esmtps (TLS1.2:DHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1kKFdH-0005Dd-1c for qemu-devel@nongnu.org; Mon, 21 Sep 2020 02:49:05 -0400 Received: from [192.168.0.183] (unknown [62.118.151.149]) by mail.ispras.ru (Postfix) with ESMTPSA id 4837B40A2077; Mon, 21 Sep 2020 06:48:59 +0000 (UTC) Subject: Re: [PATCH v4 00/15] Reverse debugging To: Paolo Bonzini , qemu-devel@nongnu.org References: <160006358590.31457.16757371597343007847.stgit@pasha-ThinkPad-X280> From: Pavel Dovgalyuk Message-ID: <81870ddb-5bde-898c-fdb8-a2770ccafa4a@ispras.ru> Date: Mon, 21 Sep 2020 09:48:59 +0300 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.10.0 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=utf-8; format=flowed Content-Language: en-US Content-Transfer-Encoding: 7bit Received-SPF: pass client-ip=83.149.199.84; envelope-from=pavel.dovgalyuk@ispras.ru; helo=mail.ispras.ru X-detected-operating-system: by eggs.gnu.org: First seen = 2020/09/21 02:03:38 X-ACL-Warn: Detected OS = Linux 3.11 and newer [fuzzy] X-Spam_score_int: -18 X-Spam_score: -1.9 X-Spam_bar: - X-Spam_report: (-1.9 / 5.0 requ) BAYES_00=-1.9, NICE_REPLY_A=-0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: kwolf@redhat.com, wrampazz@redhat.com, ehabkost@redhat.com, alex.bennee@linaro.org, mtosatti@redhat.com, armbru@redhat.com, mreitz@redhat.com, stefanha@redhat.com, crosa@redhat.com, philmd@redhat.com, zhiwei_liu@c-sky.com, rth@twiddle.net Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" On 20.09.2020 10:58, Paolo Bonzini wrote: > On 14/09/20 08:06, Pavel Dovgalyuk wrote: >> GDB remote protocol supports reverse debugging of the targets. >> It includes 'reverse step' and 'reverse continue' operations. >> The first one finds the previous step of the execution, >> and the second one is intended to stop at the last breakpoint that >> would happen when the program is executed normally. >> >> Reverse debugging is possible in the replay mode, when at least >> one snapshot was created at the record or replay phase. >> QEMU can use these snapshots for travelling back in time with GDB. > > I had queued this, it is a very nice patch series. Unfortunately, the > tests failed on gitlab: > > https://gitlab.com/bonzini/qemu/-/jobs/745795080 There are other tests that were disabled on gitlab for the unknown reason. https://patchwork.kernel.org/patch/11636515/ https://patchwork.kernel.org/patch/11701681/ The latter is related to machine_rx_gdbsim.py Could it be the same avocado/python/etc issue with socket interaction? Pavel Dovgalyuk