From patchwork Wed May 6 14:03:04 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Pavel Dovgalyuk X-Patchwork-Id: 468948 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Received: from lists.gnu.org (lists.gnu.org [IPv6:2001:4830:134:3::11]) (using TLSv1 with cipher AES256-SHA (256/256 bits)) (No client certificate requested) by ozlabs.org (Postfix) with ESMTPS id CC1A3140134 for ; Thu, 7 May 2015 00:05:13 +1000 (AEST) Received: from localhost ([::1]:45290 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1Ypzwl-0004br-VR for incoming@patchwork.ozlabs.org; Wed, 06 May 2015 10:05:12 -0400 Received: from eggs.gnu.org ([2001:4830:134:3::10]:47207) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1Ypzuk-0000vy-MM for qemu-devel@nongnu.org; Wed, 06 May 2015 10:03:11 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1Ypzuh-0001xo-Gi for qemu-devel@nongnu.org; Wed, 06 May 2015 10:03:06 -0400 Received: from mail.ispras.ru ([83.149.199.45]:48951) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1Ypzuh-0001xU-3H for qemu-devel@nongnu.org; Wed, 06 May 2015 10:03:03 -0400 Received: from [10.10.150.102] (unknown [85.142.117.224]) by mail.ispras.ru (Postfix) with ESMTPSA id 4371C54006F; Wed, 6 May 2015 17:03:02 +0300 (MSK) To: qemu-devel@nongnu.org From: Pavel Dovgalyuk Date: Wed, 06 May 2015 17:03:04 +0300 Message-ID: <20150506140304.17288.69382.stgit@PASHA-ISP> In-Reply-To: <20150506140238.17288.87548.stgit@PASHA-ISP> References: <20150506140238.17288.87548.stgit@PASHA-ISP> User-Agent: StGit/0.16 MIME-Version: 1.0 X-detected-operating-system: by eggs.gnu.org: GNU/Linux 3.x X-Received-From: 83.149.199.45 Cc: peter.maydell@linaro.org, peter.crosthwaite@xilinx.com, alex.bennee@linaro.org, mark.burton@greensocs.com, real@ispras.ru, batuzovk@ispras.ru, maria.klimushenkova@ispras.ru, pavel.dovgaluk@ispras.ru, pbonzini@redhat.com, fred.konrad@greensocs.com Subject: [Qemu-devel] [RFC PATCH v13 04/21] replay: internal functions for replay log X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.14 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Sender: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org This patch adds functions to perform read and write operations with replay log. Reviewed-by: Paolo Bonzini Signed-off-by: Pavel Dovgalyuk --- replay/Makefile.objs | 1 replay/replay-internal.c | 149 ++++++++++++++++++++++++++++++++++++++++++++++ replay/replay-internal.h | 46 ++++++++++++++ 3 files changed, 196 insertions(+), 0 deletions(-) create mode 100755 replay/replay-internal.c create mode 100755 replay/replay-internal.h diff --git a/replay/Makefile.objs b/replay/Makefile.objs index 7ea860f..1148f45 100755 --- a/replay/Makefile.objs +++ b/replay/Makefile.objs @@ -1 +1,2 @@ obj-y += replay.o +obj-y += replay-internal.o diff --git a/replay/replay-internal.c b/replay/replay-internal.c new file mode 100755 index 0000000..c2bbf5f --- /dev/null +++ b/replay/replay-internal.c @@ -0,0 +1,149 @@ +/* + * replay-internal.c + * + * Copyright (c) 2010-2015 Institute for System Programming + * of the Russian Academy of Sciences. + * + * This work is licensed under the terms of the GNU GPL, version 2 or later. + * See the COPYING file in the top-level directory. + * + */ + +#include "qemu-common.h" +#include "replay-internal.h" + +unsigned int replay_data_kind = -1; +static unsigned int replay_has_unread_data; + +/* File for replay writing */ +FILE *replay_file; + +void replay_put_byte(uint8_t byte) +{ + if (replay_file) { + putc(byte, replay_file); + } +} + +void replay_put_event(uint8_t event) +{ + replay_put_byte(event); +} + + +void replay_put_word(uint16_t word) +{ + replay_put_byte(word >> 8); + replay_put_byte(word); +} + +void replay_put_dword(uint32_t dword) +{ + replay_put_word(dword >> 16); + replay_put_word(dword); +} + +void replay_put_qword(int64_t qword) +{ + replay_put_dword(qword >> 32); + replay_put_dword(qword); +} + +void replay_put_array(const uint8_t *buf, size_t size) +{ + if (replay_file) { + replay_put_dword(size); + fwrite(buf, 1, size, replay_file); + } +} + +uint8_t replay_get_byte(void) +{ + uint8_t byte = 0; + if (replay_file) { + byte = getc(replay_file); + } + return byte; +} + +uint16_t replay_get_word(void) +{ + uint16_t word = 0; + if (replay_file) { + word = replay_get_byte(); + word = (word << 8) + replay_get_byte(); + } + + return word; +} + +uint32_t replay_get_dword(void) +{ + uint32_t dword = 0; + if (replay_file) { + dword = replay_get_word(); + dword = (dword << 16) + replay_get_word(); + } + + return dword; +} + +int64_t replay_get_qword(void) +{ + int64_t qword = 0; + if (replay_file) { + qword = replay_get_dword(); + qword = (qword << 32) + replay_get_dword(); + } + + return qword; +} + +void replay_get_array(uint8_t *buf, size_t *size) +{ + if (replay_file) { + *size = replay_get_dword(); + fread(buf, 1, *size, replay_file); + } +} + +void replay_get_array_alloc(uint8_t **buf, size_t *size) +{ + if (replay_file) { + *size = replay_get_dword(); + *buf = g_malloc(*size); + fread(*buf, 1, *size, replay_file); + } +} + +void replay_check_error(void) +{ + if (replay_file) { + if (feof(replay_file)) { + error_report("replay file is over"); + qemu_system_vmstop_request_prepare(); + qemu_system_vmstop_request(RUN_STATE_PAUSED); + } else if (ferror(replay_file)) { + error_report("replay file is over or something goes wrong"); + qemu_system_vmstop_request_prepare(); + qemu_system_vmstop_request(RUN_STATE_INTERNAL_ERROR); + } + } +} + +void replay_fetch_data_kind(void) +{ + if (replay_file) { + if (!replay_has_unread_data) { + replay_data_kind = replay_get_byte(); + replay_check_error(); + replay_has_unread_data = 1; + } + } +} + +void replay_finish_event(void) +{ + replay_has_unread_data = 0; + replay_fetch_data_kind(); +} diff --git a/replay/replay-internal.h b/replay/replay-internal.h new file mode 100755 index 0000000..17600de --- /dev/null +++ b/replay/replay-internal.h @@ -0,0 +1,46 @@ +#ifndef REPLAY_INTERNAL_H +#define REPLAY_INTERNAL_H + +/* + * replay-internal.h + * + * Copyright (c) 2010-2015 Institute for System Programming + * of the Russian Academy of Sciences. + * + * This work is licensed under the terms of the GNU GPL, version 2 or later. + * See the COPYING file in the top-level directory. + * + */ + +#include + +extern unsigned int replay_data_kind; + +/* File for replay writing */ +extern FILE *replay_file; + +void replay_put_byte(uint8_t byte); +void replay_put_event(uint8_t event); +void replay_put_word(uint16_t word); +void replay_put_dword(uint32_t dword); +void replay_put_qword(int64_t qword); +void replay_put_array(const uint8_t *buf, size_t size); + +uint8_t replay_get_byte(void); +uint16_t replay_get_word(void); +uint32_t replay_get_dword(void); +int64_t replay_get_qword(void); +void replay_get_array(uint8_t *buf, size_t *size); +void replay_get_array_alloc(uint8_t **buf, size_t *size); + +/*! Checks error status of the file. */ +void replay_check_error(void); + +/*! Finishes processing of the replayed event and fetches + the next event from the log. */ +void replay_finish_event(void); +/*! Reads data type from the file and stores it in the + replay_data_kind variable. */ +void replay_fetch_data_kind(void); + +#endif