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replay: introduce info hmp/qmp command

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This patch introduces 'info replay' monitor command and
corresponding qmp request.
These commands request the current record/replay mode, replay log file
name, and the instruction count (number of recorded/replayed
instructions).  The instruction count can be used with the
replay_seek/replay_break commands added in the next two patches.

Signed-off-by: Pavel Dovgalyuk <Pavel.Dovgalyuk@ispras.ru>
Acked-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Acked-by: Markus Armbruster <armbru@redhat.com>
Message-Id: <160174520026.12451.13112161947433306561.stgit@pasha-ThinkPad-X280>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Pavel Dovgalyuk 2020-10-03 20:13:20 +03:00 committed by Paolo Bonzini
parent 43d7e1d782
commit e3b09ad2b6
6 changed files with 97 additions and 1 deletions
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11
hmp-commands-info.hx
View File

@ -881,4 +881,15 @@ SRST
Show SEV information.
ERST
{
.name = "replay",
.args_type = "",
.params = "",
.help = "show record/replay information",
.cmd = hmp_info_replay,
},
SRST
``info replay``
Display the record/replay information: mode and the current icount.
ERST

1
include/monitor/hmp.h
View File

@ -129,5 +129,6 @@ void hmp_hotpluggable_cpus(Monitor *mon, const QDict *qdict);
void hmp_info_vm_generation_id(Monitor *mon, const QDict *qdict);
void hmp_info_memory_size_summary(Monitor *mon, const QDict *qdict);
void hmp_info_sev(Monitor *mon, const QDict *qdict);
void hmp_info_replay(Monitor *mon, const QDict *qdict);
#endif

3
qapi/block-core.json
View File

@ -29,7 +29,8 @@
#
# @icount: Current instruction count. Appears when execution record/replay
# is enabled. Used for "time-traveling" to match the moment
# in the recorded execution with the snapshots. (since 5.2)
# in the recorded execution with the snapshots. This counter may
# be obtained through @query-replay command (since 5.2)
#
# Since: 1.3
#

39
qapi/replay.json
View File

@ -24,3 +24,42 @@
##
{ 'enum': 'ReplayMode',
'data': [ 'none', 'record', 'play' ] }
##
# @ReplayInfo:
#
# Record/replay information.
#
# @mode: current mode.
#
# @filename: name of the record/replay log file.
# It is present only in record or replay modes, when the log
# is recorded or replayed.
#
# @icount: current number of executed instructions.
#
# Since: 5.2
#
##
{ 'struct': 'ReplayInfo',
'data': { 'mode': 'ReplayMode', '*filename': 'str', 'icount': 'int' } }
##
# @query-replay:
#
# Retrieve the record/replay information.
# It includes current instruction count which may be used for
# @replay-break and @replay-seek commands.
#
# Returns: record/replay information.
#
# Since: 5.2
#
# Example:
#
# -> { "execute": "query-replay" }
# <- { "return": { "mode": "play", "filename": "log.rr", "icount": 220414 } }
#
##
{ 'command': 'query-replay',
'returns': 'ReplayInfo' }

1
replay/meson.build
View File

@ -9,4 +9,5 @@ softmmu_ss.add(files(
'replay-net.c',
'replay-audio.c',
'replay-random.c',
'replay-debugging.c',
))

43
replay/replay-debugging.c Normal file
View File

@ -0,0 +1,43 @@
/*
* replay-debugging.c
*
* Copyright (c) 2010-2020 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/osdep.h"
#include "qapi/error.h"
#include "sysemu/replay.h"
#include "replay-internal.h"
#include "monitor/hmp.h"
#include "monitor/monitor.h"
#include "qapi/qapi-commands-replay.h"
void hmp_info_replay(Monitor *mon, const QDict *qdict)
{
if (replay_mode == REPLAY_MODE_NONE) {
monitor_printf(mon, "Record/replay is not active\n");
} else {
monitor_printf(mon,
"%s execution '%s': instruction count = %"PRId64"\n",
replay_mode == REPLAY_MODE_RECORD ? "Recording" : "Replaying",
replay_get_filename(), replay_get_current_icount());
}
}
ReplayInfo *qmp_query_replay(Error **errp)
{
ReplayInfo *retval = g_new0(ReplayInfo, 1);
retval->mode = replay_mode;
if (replay_get_filename()) {
retval->filename = g_strdup(replay_get_filename());
retval->has_filename = true;
}
retval->icount = replay_get_current_icount();
return retval;
}