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replay: checkpoints

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This patch introduces checkpoints that synchronize cpu thread and iothread.
When checkpoint is met in the code all asynchronous events from the queue
are executed.

Signed-off-by: Pavel Dovgalyuk <pavel.dovgaluk@ispras.ru>
Message-Id: <20150917162444.8676.52916.stgit@PASHA-ISP.def.inno>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Pavel Dovgalyuk <Pavel.Dovgaluk@ispras.ru>
This commit is contained in:
Pavel Dovgalyuk 2015-09-17 19:24:44 +03:00 • committed by Paolo Bonzini
parent efab87cf79
commit 8bd7f71d79
7 changed files with 134 additions and 12 deletions
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20
include/sysemu/replay.h
View file

@ -26,6 +26,20 @@ enum ReplayClockKind {
};
typedef enum ReplayClockKind ReplayClockKind;
/* IDs of the checkpoints */
enum ReplayCheckpoint {
CHECKPOINT_CLOCK_WARP,
CHECKPOINT_RESET_REQUESTED,
CHECKPOINT_SUSPEND_REQUESTED,
CHECKPOINT_CLOCK_VIRTUAL,
CHECKPOINT_CLOCK_HOST,
CHECKPOINT_CLOCK_VIRTUAL_RT,
CHECKPOINT_INIT,
CHECKPOINT_RESET,
CHECKPOINT_COUNT
};
typedef enum ReplayCheckpoint ReplayCheckpoint;
extern ReplayMode replay_mode;
/* Processing the instructions */
@ -70,6 +84,12 @@ int64_t replay_read_clock(ReplayClockKind kind);
/*! Called when qemu shutdown is requested. */
void replay_shutdown_request(void);
/*! Should be called at check points in the execution.
These check points are skipped, if they were not met.
Saves checkpoint in the SAVE mode and validates in the PLAY mode.
Returns 0 in PLAY mode if checkpoint was not found.
Returns 1 in all other cases. */
bool replay_checkpoint(ReplayCheckpoint checkpoint);
/* Asynchronous events queue */