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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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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' }