From nobody Sat Nov 1 22:30:11 2025 Delivered-To: importer@patchew.org Received-SPF: pass (zoho.com: domain of gnu.org designates 208.118.235.17 as permitted sender) client-ip=208.118.235.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Authentication-Results: mx.zohomail.com; spf=pass (zoho.com: domain of gnu.org designates 208.118.235.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org Return-Path: Received: from lists.gnu.org (lists.gnu.org [208.118.235.17]) by mx.zohomail.com with SMTPS id 1527059198801546.4561533041856; Wed, 23 May 2018 00:06:38 -0700 (PDT) Received: from localhost ([::1]:59587 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1fLNr2-00056j-Ep for importer@patchew.org; Wed, 23 May 2018 03:06:36 -0400 Received: from eggs.gnu.org ([2001:4830:134:3::10]:50443) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1fLNcQ-00025W-No for qemu-devel@nongnu.org; Wed, 23 May 2018 02:51:31 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1fLNcP-0000dU-TA for qemu-devel@nongnu.org; Wed, 23 May 2018 02:51:30 -0400 Received: from mail.ispras.ru ([83.149.199.45]:36468) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1fLNcP-0000dK-Kk for qemu-devel@nongnu.org; Wed, 23 May 2018 02:51:29 -0400 Received: from [127.0.1.1] (unknown [85.142.117.226]) by mail.ispras.ru (Postfix) with ESMTPSA id 9BB425400A8; Wed, 23 May 2018 09:51:28 +0300 (MSK) From: Pavel Dovgalyuk To: qemu-devel@nongnu.org Date: Wed, 23 May 2018 09:51:30 +0300 Message-ID: <20180523065130.26016.17763.stgit@pasha-VirtualBox> In-Reply-To: <20180523064941.26016.74274.stgit@pasha-VirtualBox> References: <20180523064941.26016.74274.stgit@pasha-VirtualBox> User-Agent: StGit/0.17.1-dirty MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable X-detected-operating-system: by eggs.gnu.org: GNU/Linux 3.x [fuzzy] X-Received-From: 83.149.199.45 Subject: [Qemu-devel] [PATCH v3 19/19] replay: allow loading any snapshots before recording X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: kwolf@redhat.com, peter.maydell@linaro.org, war2jordan@live.com, pavel.dovgaluk@ispras.ru, pbonzini@redhat.com, quintela@redhat.com, ciro.santilli@gmail.com, jasowang@redhat.com, crosthwaite.peter@gmail.com, zuban32s@gmail.com, armbru@redhat.com, maria.klimushenkova@ispras.ru, mst@redhat.com, kraxel@redhat.com, boost.lists@gmail.com, thomas.dullien@googlemail.com, dovgaluk@ispras.ru, mreitz@redhat.com, alex.bennee@linaro.org, dgilbert@redhat.com, rth@twiddle.net Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail: RSF_0 Z_629925259 SPT_0 This patch enables using -loadvm in recording mode to allow starting the execution recording from any of the available snapshots. It also fixes loading of the record/replay state, therefore snapshots created in replay mode may also be used for starting the new recording. Signed-off-by: Pavel Dovgalyuk --- replay/replay-snapshot.c | 17 ++++++++++++----- vl.c | 7 ++++--- 2 files changed, 16 insertions(+), 8 deletions(-) diff --git a/replay/replay-snapshot.c b/replay/replay-snapshot.c index 2ab85cf..16bacc9 100644 --- a/replay/replay-snapshot.c +++ b/replay/replay-snapshot.c @@ -33,11 +33,18 @@ static int replay_pre_save(void *opaque) static int replay_post_load(void *opaque, int version_id) { ReplayState *state =3D opaque; - fseek(replay_file, state->file_offset, SEEK_SET); - qemu_clock_set_last(QEMU_CLOCK_HOST, state->host_clock_last); - /* If this was a vmstate, saved in recording mode, - we need to initialize replay data fields. */ - replay_fetch_data_kind(); + if (replay_mode =3D=3D REPLAY_MODE_PLAY) { + fseek(replay_file, state->file_offset, SEEK_SET); + qemu_clock_set_last(QEMU_CLOCK_HOST, state->host_clock_last); + /* If this was a vmstate, saved in recording mode, + we need to initialize replay data fields. */ + replay_fetch_data_kind(); + } else if (replay_mode =3D=3D REPLAY_MODE_RECORD) { + /* This is only useful for loading the initial state. + Therefore reset all the counters. */ + state->instructions_count =3D 0; + state->block_request_id =3D 0; + } =20 return 0; } diff --git a/vl.c b/vl.c index ac2394a..fa71d65 100644 --- a/vl.c +++ b/vl.c @@ -4651,15 +4651,16 @@ int main(int argc, char **argv, char **envp) replay_checkpoint(CHECKPOINT_RESET); qemu_system_reset(SHUTDOWN_CAUSE_NONE); register_global_state(); - if (replay_mode !=3D REPLAY_MODE_NONE) { - replay_vmstate_init(); - } else if (loadvm) { + if (loadvm) { Error *local_err =3D NULL; if (load_snapshot(loadvm, &local_err) < 0) { error_report_err(local_err); autostart =3D 0; } } + if (replay_mode !=3D REPLAY_MODE_NONE) { + replay_vmstate_init(); + } =20 qdev_prop_check_globals(); if (vmstate_dump_file) {