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;
}
void replay_char_read_all_save_buf(uint8_t *buf, int offset)
{
replay_save_instructions();
replay_mutex_lock();
replay_put_event(EVENT_CHAR_READ_ALL);
replay_put_array(buf, offset);
replay_mutex_unlock();
}
void replay_shutdown_request(void)
{
if (replay_mode == REPLAY_MODE_RECORD) {
replay_mutex_lock();
replay_put_event(EVENT_SHUTDOWN);
replay_mutex_unlock();
}
}
void replay_char_read_all_save_error(int res)
{
assert(res < 0);
replay_save_instructions();
replay_mutex_lock();
replay_put_event(EVENT_CHAR_READ_ALL_ERROR);
replay_put_dword(res);
replay_mutex_unlock();
}
void replay_char_write_event_save(int res, int offset)
{
replay_save_instructions();
replay_mutex_lock();
replay_put_event(EVENT_CHAR_WRITE);
replay_put_dword(res);
replay_put_dword(offset);
replay_mutex_unlock();
}
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_exception(void)
{
if (replay_mode == REPLAY_MODE_RECORD) {
replay_save_instructions();
replay_mutex_lock();
replay_put_event(EVENT_EXCEPTION);
replay_mutex_unlock();
return true;
} else if (replay_mode == REPLAY_MODE_PLAY) {
bool res = replay_has_exception();
if (res) {
replay_mutex_lock();
replay_finish_event();
replay_mutex_unlock();
}
return res;
}
return true;
}
bool replay_has_interrupt(void)
{
bool res = false;
if (replay_mode == REPLAY_MODE_PLAY) {
replay_account_executed_instructions();
replay_mutex_lock();
res = replay_next_event_is(EVENT_INTERRUPT);
replay_mutex_unlock();
}
return res;
}
bool replay_interrupt(void)
{
if (replay_mode == REPLAY_MODE_RECORD) {
replay_save_instructions();
replay_mutex_lock();
replay_put_event(EVENT_INTERRUPT);
replay_mutex_unlock();
return true;
} else if (replay_mode == REPLAY_MODE_PLAY) {
bool res = replay_has_interrupt();
if (res) {
replay_mutex_lock();
replay_finish_event();
replay_mutex_unlock();
}
return res;
}
return true;
}
bool replay_has_exception(void)
{
bool res = false;
if (replay_mode == REPLAY_MODE_PLAY) {
replay_account_executed_instructions();
replay_mutex_lock();
res = replay_next_event_is(EVENT_EXCEPTION);
replay_mutex_unlock();
}
return res;
}
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);
}
}
void replay_account_executed_instructions(void)
{
if (replay_mode == REPLAY_MODE_PLAY) {
replay_mutex_lock();
if (replay_state.instructions_count > 0) {
int count = (int)(replay_get_current_step()
- replay_state.current_step);
replay_state.instructions_count -= count;
replay_state.current_step += count;
if (replay_state.instructions_count == 0) {
assert(replay_state.data_kind == EVENT_INSTRUCTION);
replay_finish_event();
/* Wake up iothread. This is required because
timers will not expire until clock counters
will be read from the log. */
qemu_notify_event();
}
}
replay_mutex_unlock();
}
}
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);
}
}
static int os_host_main_loop_wait(int64_t timeout)
{
GMainContext *context = g_main_context_default();
int ret;
g_main_context_acquire(context);
glib_pollfds_fill(&timeout);
qemu_mutex_unlock_iothread();
replay_mutex_unlock();
ret = qemu_poll_ns((GPollFD *)gpollfds->data, gpollfds->len, timeout);
replay_mutex_lock();
qemu_mutex_lock_iothread();
glib_pollfds_poll();
g_main_context_release(context);
return ret;
}
static int os_host_main_loop_wait(int64_t timeout)
{
GMainContext *context = g_main_context_default();
GPollFD poll_fds[1024 * 2]; /* this is probably overkill */
int select_ret = 0;
int g_poll_ret, ret, i, n_poll_fds;
PollingEntry *pe;
WaitObjects *w = &wait_objects;
gint poll_timeout;
int64_t poll_timeout_ns;
static struct timeval tv0;
fd_set rfds, wfds, xfds;
int nfds;
g_main_context_acquire(context);
/* XXX: need to suppress polling by better using win32 events */
ret = 0;
for (pe = first_polling_entry; pe != NULL; pe = pe->next) {
ret |= pe->func(pe->opaque);
}
if (ret != 0) {
g_main_context_release(context);
return ret;
}
FD_ZERO(&rfds);
FD_ZERO(&wfds);
FD_ZERO(&xfds);
nfds = pollfds_fill(gpollfds, &rfds, &wfds, &xfds);
if (nfds >= 0) {
select_ret = select(nfds + 1, &rfds, &wfds, &xfds, &tv0);
if (select_ret != 0) {
timeout = 0;
}
if (select_ret > 0) {
pollfds_poll(gpollfds, nfds, &rfds, &wfds, &xfds);
}
}
g_main_context_prepare(context, &max_priority);
n_poll_fds = g_main_context_query(context, max_priority, &poll_timeout,
poll_fds, ARRAY_SIZE(poll_fds));
g_assert(n_poll_fds <= ARRAY_SIZE(poll_fds));
for (i = 0; i < w->num; i++) {
poll_fds[n_poll_fds + i].fd = (DWORD_PTR)w->events[i];
poll_fds[n_poll_fds + i].events = G_IO_IN;
}
if (poll_timeout < 0) {
poll_timeout_ns = -1;
} else {
poll_timeout_ns = (int64_t)poll_timeout * (int64_t)SCALE_MS;
}
poll_timeout_ns = qemu_soonest_timeout(poll_timeout_ns, timeout);
qemu_mutex_unlock_iothread();
replay_mutex_unlock();
g_poll_ret = qemu_poll_ns(poll_fds, n_poll_fds + w->num, poll_timeout_ns);
replay_mutex_lock();
qemu_mutex_lock_iothread();
if (g_poll_ret > 0) {
for (i = 0; i < w->num; i++) {
w->revents[i] = poll_fds[n_poll_fds + i].revents;
}
for (i = 0; i < w->num; i++) {
if (w->revents[i] && w->func[i]) {
w->func[i](w->opaque[i]);
}
}
}
if (g_main_context_check(context, max_priority, poll_fds, n_poll_fds)) {
g_main_context_dispatch(context);
}
g_main_context_release(context);
return select_ret || g_poll_ret;
}