memset(&stats,0,sizeof(struct execution_stats));
init_thread = new Thread(execution->get_next_id(), (thrd_t *) model_malloc(sizeof(thrd_t)), &placeholder, NULL, NULL);
#ifdef TLS
memset(&stats,0,sizeof(struct execution_stats));
init_thread = new Thread(execution->get_next_id(), (thrd_t *) model_malloc(sizeof(thrd_t)), &placeholder, NULL, NULL);
#ifdef TLS