/**
* @brief Check if execution is stuck with no enabled threads and some sleeping
* thread
- * @return True if no threads are enabled an some thread is in the sleep set;
+ * @return True if no threads are enabled and some thread is in the sleep set;
* false otherwise
*/
bool Scheduler::all_threads_sleeping() const
Thread * Scheduler::select_next_thread()
{
int avail_threads = 0;
- int thread_list[enabled_len];
- for (int i = 0;i< enabled_len;i++) {
+ int sleep_threads = 0;
+ int thread_list[enabled_len], sleep_list[enabled_len];
+ Thread * thread;
+
+ for (int i = 0;i < enabled_len;i++) {
if (enabled[i] == THREAD_ENABLED)
thread_list[avail_threads++] = i;
+ else if (enabled[i] == THREAD_SLEEP_SET)
+ sleep_list[sleep_threads++] = i;
}
- if (avail_threads == 0)
- return NULL;// No threads availablex
+ if (avail_threads == 0 && !execution->getFuzzer()->has_paused_threads()) {
+ if (sleep_threads != 0) {
+ // No threads available, but some threads sleeping. Wake up one of them
+ thread = execution->getFuzzer()->selectThread(sleep_list, sleep_threads);
+ remove_sleep(thread);
+ thread->set_wakeup_state(true);
+ } else {
+ return NULL; // No threads available and no threads sleeping.
+ }
+ } else {
+ // Some threads are available
+ thread = execution->getFuzzer()->selectThread(thread_list, avail_threads);
+ }
- Thread * thread = execution->getFuzzer()->selectThread(thread_list, avail_threads);
curr_thread_index = id_to_int(thread->get_id());
return thread;
}