From patchwork Thu Jan 11 08:27:27 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Pavel Dovgalyuk X-Patchwork-Id: 124161 Delivered-To: patch@linaro.org Received: by 10.140.22.227 with SMTP id 90csp375567qgn; Thu, 11 Jan 2018 00:41:16 -0800 (PST) X-Google-Smtp-Source: ACJfBosyBbj/xVaLEbyDEA1rlSSPzvLEIv6Lmlpv9Gel041AdgrnDwE0aljyW3Ay/9puHCdWId9o X-Received: by 10.37.103.69 with SMTP id b66mr19210337ybc.92.1515660076206; Thu, 11 Jan 2018 00:41:16 -0800 (PST) ARC-Seal: i=1; a=rsa-sha256; t=1515660076; cv=none; d=google.com; s=arc-20160816; b=xwY+OhoHpinLOxmyJ3XigpF6DjmNMtir0CecOj5lFxUULYyUTez2j4+T3JLHagPvWu iBUgPRJM3W063xafk/Dhd8pGnRiXObFo3eXy7CuvoVrpj7lum8Zo4mUFMW96r6RfARv6 RpeE/c+oCYN6RpBNK5nUELUJnRmomAk1iNbiiJ7Kw6mVIW0FDWuWtinZG7eF1oNX2V4B GrfT2zfJ3qCWS2yv5ezmSKB3ObY5FTO/aZmRawzBYTK6ZjXicM/Bwg/e9tA8vAx8Ml4T kygAhipN7dVTulhgoC6Kab7EwcyGJrCRCQzK3DNYVnrRmQV9bMLVpCtbppw3QApNq+sA A8tQ== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=sender:errors-to:cc:list-subscribe:list-help:list-post:list-archive :list-unsubscribe:list-id:precedence:subject :content-transfer-encoding:mime-version:user-agent:references :in-reply-to:message-id:date:to:from:arc-authentication-results; bh=v9IcqYv/yTMbdIsaamfWIMaz4pDbaHYdRiABxfCNKtU=; b=D73CTat9DHXDZD6STQSwREsBDOszRgxK2KhiX51p5pliCvNAZIkQ4tnfv3SlPwd/82 kOPdLANTJ7V9/pPAflI1a3Imp60l0RqqJagnvbdGxXz88jtnKn2yYKtczqKG8fXdO3dq VGFke+wg6yikXs2aLLZf+VCBlCxNsZYQccnxENLe4MyUMu4C3XAjibwF5fEupQMlwfjF incdpLSP8MD6c58Zh3JECEDG1dg+9P+ghI0g1F/WjQ+5SSNBREj9Rrzgoopv3vdstKWp w4wBYM9OY+V3wVhijFaag7bq1p2LHqqLSqeGt5EvvvSfP9nWFRKNOThx1DbHEcwsRm5d hynA== ARC-Authentication-Results: i=1; mx.google.com; spf=pass (google.com: domain of qemu-devel-bounces+patch=linaro.org@nongnu.org designates 2001:4830:134:3::11 as permitted sender) smtp.mailfrom=qemu-devel-bounces+patch=linaro.org@nongnu.org Return-Path: Received: from lists.gnu.org (lists.gnu.org. [2001:4830:134:3::11]) by mx.google.com with ESMTPS id c126si3869230ywe.482.2018.01.11.00.41.16 for (version=TLS1 cipher=AES128-SHA bits=128/128); Thu, 11 Jan 2018 00:41:16 -0800 (PST) Received-SPF: pass (google.com: domain of qemu-devel-bounces+patch=linaro.org@nongnu.org designates 2001:4830:134:3::11 as permitted sender) client-ip=2001:4830:134:3::11; Authentication-Results: mx.google.com; spf=pass (google.com: domain of qemu-devel-bounces+patch=linaro.org@nongnu.org designates 2001:4830:134:3::11 as permitted sender) smtp.mailfrom=qemu-devel-bounces+patch=linaro.org@nongnu.org Received: from localhost ([::1]:53118 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1eZYQF-0004fL-Ia for patch@linaro.org; Thu, 11 Jan 2018 03:41:15 -0500 Received: from eggs.gnu.org ([2001:4830:134:3::10]:47597) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1eZYCx-0001Xi-7C for qemu-devel@nongnu.org; Thu, 11 Jan 2018 03:27:33 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1eZYCt-0002jb-2V for qemu-devel@nongnu.org; Thu, 11 Jan 2018 03:27:31 -0500 Received: from mail.ispras.ru ([83.149.199.45]:42032) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1eZYCs-0002iZ-M1 for qemu-devel@nongnu.org; Thu, 11 Jan 2018 03:27:26 -0500 Received: from [127.0.1.1] (unknown [85.142.117.226]) by mail.ispras.ru (Postfix) with ESMTPSA id C2CD354006D; Thu, 11 Jan 2018 11:27:25 +0300 (MSK) From: Pavel Dovgalyuk To: qemu-devel@nongnu.org Date: Thu, 11 Jan 2018 11:27:27 +0300 Message-ID: <20180111082727.27295.94934.stgit@pasha-VirtualBox> In-Reply-To: <20180111082452.27295.85707.stgit@pasha-VirtualBox> References: <20180111082452.27295.85707.stgit@pasha-VirtualBox> User-Agent: StGit/0.17.1-dirty MIME-Version: 1.0 X-detected-operating-system: by eggs.gnu.org: GNU/Linux 3.x [fuzzy] X-Received-From: 83.149.199.45 Subject: [Qemu-devel] [RFC PATCH v3 27/30] scripts/replay-dump.py: replay log dumper 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, pavel.dovgaluk@ispras.ru, mst@redhat.com, jasowang@redhat.com, quintela@redhat.com, zuban32s@gmail.com, maria.klimushenkova@ispras.ru, dovgaluk@ispras.ru, kraxel@redhat.com, boost.lists@gmail.com, pbonzini@redhat.com, alex.bennee@linaro.org Errors-To: qemu-devel-bounces+patch=linaro.org@nongnu.org Sender: "Qemu-devel" From: Alex Bennée This script is a debugging tool for looking through the contents of a replay log file. It is incomplete but should fail gracefully at events it doesn't understand. It currently understands two different log formats as the audio record/replay support was merged during since MTTCG. It was written to help debug what has caused the BQL changes to break replay support. Signed-off-by: Alex Bennée --- v2 - yet another update to the log format --- scripts/replay-dump.py | 308 ++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 308 insertions(+) create mode 100755 scripts/replay-dump.py diff --git a/scripts/replay-dump.py b/scripts/replay-dump.py new file mode 100755 index 0000000..203bb31 --- /dev/null +++ b/scripts/replay-dump.py @@ -0,0 +1,308 @@ +#!/usr/bin/env python +# -*- coding: utf-8 -*- +# +# Dump the contents of a recorded execution stream +# +# Copyright (c) 2017 Alex Bennée +# +# This library is free software; you can redistribute it and/or +# modify it under the terms of the GNU Lesser General Public +# License as published by the Free Software Foundation; either +# version 2 of the License, or (at your option) any later version. +# +# This library is distributed in the hope that it will be useful, +# but WITHOUT ANY WARRANTY; without even the implied warranty of +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +# Lesser General Public License for more details. +# +# You should have received a copy of the GNU Lesser General Public +# License along with this library; if not, see . + +import argparse +import struct +from collections import namedtuple + +# This mirrors some of the global replay state which some of the +# stream loading refers to. Some decoders may read the next event so +# we need handle that case. Calling reuse_event will ensure the next +# event is read from the cache rather than advancing the file. + +class ReplayState(object): + def __init__(self): + self.event = -1 + self.event_count = 0 + self.already_read = False + self.current_checkpoint = 0 + self.checkpoint = 0 + + def set_event(self, ev): + self.event = ev + self.event_count += 1 + + def get_event(self): + self.already_read = False + return self.event + + def reuse_event(self, ev): + self.event = ev + self.already_read = True + + def set_checkpoint(self): + self.checkpoint = self.event - self.checkpoint_start + + def get_checkpoint(self): + return self.checkpoint + +replay_state = ReplayState() + +# Simple read functions that mirror replay-internal.c +# The file-stream is big-endian and manually written out a byte at a time. + +def read_byte(fin): + "Read a single byte" + return struct.unpack('>B', fin.read(1))[0] + +def read_event(fin): + "Read a single byte event, but save some state" + if replay_state.already_read: + return replay_state.get_event() + else: + replay_state.set_event(read_byte(fin)) + return replay_state.event + +def read_word(fin): + "Read a 16 bit word" + return struct.unpack('>H', fin.read(2))[0] + +def read_dword(fin): + "Read a 32 bit word" + return struct.unpack('>I', fin.read(4))[0] + +def read_qword(fin): + "Read a 64 bit word" + return struct.unpack('>Q', fin.read(8))[0] + +# Generic decoder structure +Decoder = namedtuple("Decoder", "eid name fn") + +def call_decode(table, index, dumpfile): + "Search decode table for next step" + decoder = next((d for d in table if d.eid == index), None) + if not decoder: + print "Could not decode index: %d" % (index) + print "Entry is: %s" % (decoder) + print "Decode Table is:\n%s" % (table) + return False + else: + return decoder.fn(decoder.eid, decoder.name, dumpfile) + +# Print event +def print_event(eid, name, string=None, event_count=None): + "Print event with count" + if not event_count: + event_count = replay_state.event_count + + if string: + print "%d:%s(%d) %s" % (event_count, name, eid, string) + else: + print "%d:%s(%d)" % (event_count, name, eid) + + +# Decoders for each event type + +def decode_unimp(eid, name, _unused_dumpfile): + "Unimplimented decoder, will trigger exit" + print "%s not handled - will now stop" % (name) + return False + +# Checkpoint decoder +def swallow_async_qword(eid, name, dumpfile): + "Swallow a qword of data without looking at it" + step_id = read_qword(dumpfile) + print " %s(%d) @ %d" % (name, eid, step_id) + return True + +async_decode_table = [ Decoder(0, "REPLAY_ASYNC_EVENT_BH", swallow_async_qword), + Decoder(1, "REPLAY_ASYNC_INPUT", decode_unimp), + Decoder(2, "REPLAY_ASYNC_INPUT_SYNC", decode_unimp), + Decoder(3, "REPLAY_ASYNC_CHAR_READ", decode_unimp), + Decoder(4, "REPLAY_ASYNC_EVENT_BLOCK", decode_unimp), + Decoder(5, "REPLAY_ASYNC_EVENT_NET", decode_unimp), +] +# See replay_read_events/replay_read_event +def decode_async(eid, name, dumpfile): + """Decode an ASYNC event""" + + print_event(eid, name) + + async_event_kind = read_byte(dumpfile) + async_event_checkpoint = read_byte(dumpfile) + + if async_event_checkpoint != replay_state.current_checkpoint: + print " mismatch between checkpoint %d and async data %d" % ( + replay_state.current_checkpoint, async_event_checkpoint) + return True + + return call_decode(async_decode_table, async_event_kind, dumpfile) + + +def decode_instruction(eid, name, dumpfile): + ins_diff = read_dword(dumpfile) + print_event(eid, name, "0x%x" % (ins_diff)) + return True + +def decode_audio_out(eid, name, dumpfile): + audio_data = read_dword(dumpfile) + print_event(eid, name, "%d" % (audio_data)) + return True + +def decode_checkpoint(eid, name, dumpfile): + """Decode a checkpoint. + + Checkpoints contain a series of async events with their own specific data. + """ + replay_state.set_checkpoint() + # save event count as we peek ahead + event_number = replay_state.event_count + next_event = read_event(dumpfile) + + # if the next event is EVENT_ASYNC there are a bunch of + # async events to read, otherwise we are done + if next_event != 3: + print_event(eid, name, "no additional data", event_number) + else: + print_event(eid, name, "more data follows", event_number) + + replay_state.reuse_event(next_event) + return True + +def decode_checkpoint_init(eid, name, dumpfile): + print_event(eid, name) + return True + +def decode_interrupt(eid, name, dumpfile): + print_event(eid, name) + return True + +def decode_clock(eid, name, dumpfile): + clock_data = read_qword(dumpfile) + print_event(eid, name, "0x%x" % (clock_data)) + return True + + +# pre-MTTCG merge +v5_event_table = [Decoder(0, "EVENT_INSTRUCTION", decode_instruction), + Decoder(1, "EVENT_INTERRUPT", decode_interrupt), + Decoder(2, "EVENT_EXCEPTION", decode_unimp), + Decoder(3, "EVENT_ASYNC", decode_async), + Decoder(4, "EVENT_SHUTDOWN", decode_unimp), + Decoder(5, "EVENT_CHAR_WRITE", decode_unimp), + Decoder(6, "EVENT_CHAR_READ_ALL", decode_unimp), + Decoder(7, "EVENT_CHAR_READ_ALL_ERROR", decode_unimp), + Decoder(8, "EVENT_CLOCK_HOST", decode_clock), + Decoder(9, "EVENT_CLOCK_VIRTUAL_RT", decode_clock), + Decoder(10, "EVENT_CP_CLOCK_WARP_START", decode_checkpoint), + Decoder(11, "EVENT_CP_CLOCK_WARP_ACCOUNT", decode_checkpoint), + Decoder(12, "EVENT_CP_RESET_REQUESTED", decode_checkpoint), + Decoder(13, "EVENT_CP_SUSPEND_REQUESTED", decode_checkpoint), + Decoder(14, "EVENT_CP_CLOCK_VIRTUAL", decode_checkpoint), + Decoder(15, "EVENT_CP_CLOCK_HOST", decode_checkpoint), + Decoder(16, "EVENT_CP_CLOCK_VIRTUAL_RT", decode_checkpoint), + Decoder(17, "EVENT_CP_INIT", decode_checkpoint_init), + Decoder(18, "EVENT_CP_RESET", decode_checkpoint), +] + +# post-MTTCG merge, AUDIO support added +v6_event_table = [Decoder(0, "EVENT_INSTRUCTION", decode_instruction), + Decoder(1, "EVENT_INTERRUPT", decode_interrupt), + Decoder(2, "EVENT_EXCEPTION", decode_unimp), + Decoder(3, "EVENT_ASYNC", decode_async), + Decoder(4, "EVENT_SHUTDOWN", decode_unimp), + Decoder(5, "EVENT_CHAR_WRITE", decode_unimp), + Decoder(6, "EVENT_CHAR_READ_ALL", decode_unimp), + Decoder(7, "EVENT_CHAR_READ_ALL_ERROR", decode_unimp), + Decoder(8, "EVENT_AUDIO_OUT", decode_audio_out), + Decoder(9, "EVENT_AUDIO_IN", decode_unimp), + Decoder(10, "EVENT_CLOCK_HOST", decode_clock), + Decoder(11, "EVENT_CLOCK_VIRTUAL_RT", decode_clock), + Decoder(12, "EVENT_CP_CLOCK_WARP_START", decode_checkpoint), + Decoder(13, "EVENT_CP_CLOCK_WARP_ACCOUNT", decode_checkpoint), + Decoder(14, "EVENT_CP_RESET_REQUESTED", decode_checkpoint), + Decoder(15, "EVENT_CP_SUSPEND_REQUESTED", decode_checkpoint), + Decoder(16, "EVENT_CP_CLOCK_VIRTUAL", decode_checkpoint), + Decoder(17, "EVENT_CP_CLOCK_HOST", decode_checkpoint), + Decoder(18, "EVENT_CP_CLOCK_VIRTUAL_RT", decode_checkpoint), + Decoder(19, "EVENT_CP_INIT", decode_checkpoint_init), + Decoder(20, "EVENT_CP_RESET", decode_checkpoint), +] + +# Shutdown cause added +v7_event_table = [Decoder(0, "EVENT_INSTRUCTION", decode_instruction), + Decoder(1, "EVENT_INTERRUPT", decode_interrupt), + Decoder(2, "EVENT_EXCEPTION", decode_unimp), + Decoder(3, "EVENT_ASYNC", decode_async), + Decoder(4, "EVENT_SHUTDOWN", decode_unimp), + Decoder(5, "EVENT_SHUTDOWN_HOST_ERR", decode_unimp), + Decoder(6, "EVENT_SHUTDOWN_HOST_QMP", decode_unimp), + Decoder(7, "EVENT_SHUTDOWN_HOST_SIGNAL", decode_unimp), + Decoder(8, "EVENT_SHUTDOWN_HOST_UI", decode_unimp), + Decoder(9, "EVENT_SHUTDOWN_GUEST_SHUTDOWN", decode_unimp), + Decoder(10, "EVENT_SHUTDOWN_GUEST_RESET", decode_unimp), + Decoder(11, "EVENT_SHUTDOWN_GUEST_PANIC", decode_unimp), + Decoder(12, "EVENT_SHUTDOWN___MAX", decode_unimp), + Decoder(13, "EVENT_CHAR_WRITE", decode_unimp), + Decoder(14, "EVENT_CHAR_READ_ALL", decode_unimp), + Decoder(15, "EVENT_CHAR_READ_ALL_ERROR", decode_unimp), + Decoder(16, "EVENT_AUDIO_OUT", decode_audio_out), + Decoder(17, "EVENT_AUDIO_IN", decode_unimp), + Decoder(18, "EVENT_CLOCK_HOST", decode_clock), + Decoder(19, "EVENT_CLOCK_VIRTUAL_RT", decode_clock), + Decoder(20, "EVENT_CP_CLOCK_WARP_START", decode_checkpoint), + Decoder(21, "EVENT_CP_CLOCK_WARP_ACCOUNT", decode_checkpoint), + Decoder(22, "EVENT_CP_RESET_REQUESTED", decode_checkpoint), + Decoder(23, "EVENT_CP_SUSPEND_REQUESTED", decode_checkpoint), + Decoder(24, "EVENT_CP_CLOCK_VIRTUAL", decode_checkpoint), + Decoder(25, "EVENT_CP_CLOCK_HOST", decode_checkpoint), + Decoder(26, "EVENT_CP_CLOCK_VIRTUAL_RT", decode_checkpoint), + Decoder(27, "EVENT_CP_INIT", decode_checkpoint_init), + Decoder(28, "EVENT_CP_RESET", decode_checkpoint), +] + +def parse_arguments(): + "Grab arguments for script" + parser = argparse.ArgumentParser() + parser.add_argument("-f", "--file", help='record/replay dump to read from', + required=True) + return parser.parse_args() + +def decode_file(filename): + "Decode a record/replay dump" + dumpfile = open(filename, "rb") + + # read and throwaway the header + version = read_dword(dumpfile) + junk = read_qword(dumpfile) + + print "HEADER: version 0x%x" % (version) + + if version == 0xe02007: + event_decode_table = v7_event_table + replay_state.checkpoint_start = 12 + elif version == 0xe02006: + event_decode_table = v6_event_table + replay_state.checkpoint_start = 12 + else: + event_decode_table = v5_event_table + replay_state.checkpoint_start = 10 + + try: + decode_ok = True + while decode_ok: + event = read_event(dumpfile) + decode_ok = call_decode(event_decode_table, event, dumpfile) + finally: + dumpfile.close() + +if __name__ == "__main__": + args = parse_arguments() + decode_file(args.file)