bool replay_checkpoint(ReplayCheckpoint checkpoint)
{
bool res = false;
assert(EVENT_CHECKPOINT + checkpoint <= EVENT_CHECKPOINT_LAST);
replay_save_instructions();
if (!replay_file) {
return true;
}
replay_mutex_lock();
if (replay_mode == REPLAY_MODE_PLAY) {
if (replay_next_event_is(EVENT_CHECKPOINT + checkpoint)) {
replay_finish_event();
} else if (replay_state.data_kind != EVENT_ASYNC) {
res = false;
goto out;
}
replay_read_events(checkpoint);
/* replay_read_events may leave some unread events.
Return false if not all of the events associated with
checkpoint were processed */
res = replay_state.data_kind != EVENT_ASYNC;
} else if (replay_mode == REPLAY_MODE_RECORD) {
replay_put_event(EVENT_CHECKPOINT + checkpoint);
replay_save_events(checkpoint);
res = true;
}
out:
replay_mutex_unlock();
return res;
}
bool replay_checkpoint(ReplayCheckpoint checkpoint)
{
bool res = false;
static bool in_checkpoint;
assert(EVENT_CHECKPOINT + checkpoint <= EVENT_CHECKPOINT_LAST);
if (!replay_file) {
return true;
}
if (in_checkpoint) {
/* If we are already in checkpoint, then there is no need
for additional synchronization.
Recursion occurs when HW event modifies timers.
Timer modification may invoke the checkpoint and
proceed to recursion. */
return true;
}
in_checkpoint = true;
replay_save_instructions();
if (replay_mode == REPLAY_MODE_PLAY) {
g_assert(replay_mutex_locked());
if (replay_next_event_is(EVENT_CHECKPOINT + checkpoint)) {
replay_finish_event();
} else if (replay_state.data_kind != EVENT_ASYNC) {
res = false;
goto out;
}
replay_read_events(checkpoint);
/* replay_read_events may leave some unread events.
Return false if not all of the events associated with
checkpoint were processed */
res = replay_state.data_kind != EVENT_ASYNC;
} else if (replay_mode == REPLAY_MODE_RECORD) {
g_assert(replay_mutex_locked());
replay_put_event(EVENT_CHECKPOINT + checkpoint);
/* This checkpoint belongs to several threads.
Processing events from different threads is
non-deterministic */
if (checkpoint != CHECKPOINT_CLOCK_WARP_START
/* FIXME: this is temporary fix, other checkpoints
may also be invoked from the different threads someday.
Asynchronous event processing should be refactored
to create additional replay event kind which is
nailed to the one of the threads and which processes
the event queue. */
&& checkpoint != CHECKPOINT_CLOCK_VIRTUAL) {
replay_save_events(checkpoint);
}
res = true;
}
out:
in_checkpoint = false;
return res;
}
int replay_get_instructions(void)
{
int res = 0;
replay_mutex_lock();
if (replay_next_event_is(EVENT_INSTRUCTION)) {
res = replay_state.instructions_count;
}
replay_mutex_unlock();
return res;
}
bool replay_has_interrupt(void)
{
bool res = false;
if (replay_mode == REPLAY_MODE_PLAY) {
g_assert(replay_mutex_locked());
replay_account_executed_instructions();
res = replay_next_event_is(EVENT_INTERRUPT);
}
return res;
}
bool replay_has_exception(void)
{
bool res = false;
if (replay_mode == REPLAY_MODE_PLAY) {
g_assert(replay_mutex_locked());
replay_account_executed_instructions();
res = replay_next_event_is(EVENT_EXCEPTION);
}
return res;
}
int replay_char_read_all_load(uint8_t *buf)
{
replay_mutex_lock();
if (replay_next_event_is(EVENT_CHAR_READ_ALL)) {
size_t size;
int res;
replay_get_array(buf, &size);
replay_finish_event();
replay_mutex_unlock();
res = (int)size;
assert(res >= 0);
return res;
} else if (replay_next_event_is(EVENT_CHAR_READ_ALL_ERROR)) {
int res = replay_get_dword();
replay_finish_event();
replay_mutex_unlock();
return res;
} else {
replay_mutex_unlock();
error_report("Missing character read all event in the replay log");
exit(1);
}
}
void replay_char_write_event_load(int *res, int *offset)
{
replay_account_executed_instructions();
replay_mutex_lock();
if (replay_next_event_is(EVENT_CHAR_WRITE)) {
*res = replay_get_dword();
*offset = replay_get_dword();
replay_finish_event();
replay_mutex_unlock();
} else {
replay_mutex_unlock();
error_report("Missing character write event in the replay log");
exit(1);
}
}