-
-/** @brief Restart ModelChecker upon returning to the run loop of the
- * model checker. */
-void ModelChecker::restart()
-{
- restart_flag = true;
-}
-
-void ModelChecker::do_restart()
-{
- restart_flag = false;
- reset_to_initial_state();
- memset(&stats,0,sizeof(struct execution_stats));
- execution_number = 1;
-}
-
-void ModelChecker::startMainThread() {
- init_thread->set_state(THREAD_RUNNING);
- scheduler->set_current_thread(init_thread);
- main_thread_startup();
-}
-
-/** @brief Run ModelChecker for the user program */
-void ModelChecker::run()
-{
- //Need to initial random number generator state to avoid resets on rollback
- char random_state[256];
- initstate(423121, random_state, sizeof(random_state));
-
- for(int exec = 0;exec < params.maxexecutions;exec++) {
- Thread * t = init_thread;
-
- do {
- /*
- * Stash next pending action(s) for thread(s). There
- * should only need to stash one thread's action--the
- * thread which just took a step--plus the first step
- * for any newly-created thread
- */
- for (unsigned int i = 0;i < get_num_threads();i++) {
- thread_id_t tid = int_to_id(i);
- Thread *thr = get_thread(tid);
- if (!thr->is_model_thread() && !thr->is_complete() && !thr->get_pending()) {
- switch_from_master(thr);
- if (thr->is_waiting_on(thr))
- assert_bug("Deadlock detected (thread %u)", i);
- }
- }
-
- /* Don't schedule threads which should be disabled */
- for (unsigned int i = 0;i < get_num_threads();i++) {
- Thread *th = get_thread(int_to_id(i));
- ModelAction *act = th->get_pending();
- if (act && execution->is_enabled(th) && !execution->check_action_enabled(act)) {
- scheduler->sleep(th);
- }
- }
-
- for (unsigned int i = 1;i < get_num_threads();i++) {
- Thread *th = get_thread(int_to_id(i));
- ModelAction *act = th->get_pending();
- if (act && execution->is_enabled(th) && (th->get_state() != THREAD_BLOCKED) ) {
- if (act->is_write()) {
- std::memory_order order = act->get_mo();
- if (order == std::memory_order_relaxed || \
- order == std::memory_order_release) {
- t = th;
- break;
- }
- } else if (act->get_type() == THREAD_CREATE || \
- act->get_type() == PTHREAD_CREATE || \
- act->get_type() == THREAD_START || \
- act->get_type() == THREAD_FINISH) {
- t = th;
- break;
- }
- }
- }
-
- /* Catch assertions from prior take_step or from
- * between-ModelAction bugs (e.g., data races) */
-
- if (execution->has_asserted())
- break;
- if (!t)
- t = get_next_thread();
- if (!t || t->is_model_thread())
- break;
- if (t->just_woken_up()) {
- t->set_wakeup_state(false);
- t->set_pending(NULL);
- t = NULL;
- continue; // Allow this thread to stash the next pending action
- }
-
- /* Consume the next action for a Thread */
- ModelAction *curr = t->get_pending();
- t->set_pending(NULL);
- t = execution->take_step(curr);
- } while (!should_terminate_execution());
- next_execution();
- //restore random number generator state after rollback
- setstate(random_state);
- }
-
- model_print("******* Model-checking complete: *******\n");
- print_stats();
-
- /* Have the trace analyses dump their output. */
- for (unsigned int i = 0;i < trace_analyses.size();i++)
- trace_analyses[i]->finish();
-
- /* unlink tmp file created by last child process */
- char filename[256];
- snprintf_(filename, sizeof(filename), "C11FuzzerTmp%d", getpid());
- unlink(filename);
-}