return -1;
} else {
Predicate * selected_branch = get_selected_child_branch(tid);
- selected_branch->incr_fail_count();
- failed_predicates.put(selected_branch, true);
+ update_predicate_score(selected_branch, 1);
SnapVector<ModelAction *> * pruned_writes = thrd_pruned_writes[thread_id];
for (uint i = 0; i < pruned_writes->size(); i++) {
(*numthreads)++;
Predicate * selected_branch = get_selected_child_branch(tid);
- selected_branch->incr_fail_count();
+ update_predicate_score(selected_branch, 3);
+
model_print("thread %d is woken up\n", tid);
}
history->remove_waiting_write(tid);
history->remove_waiting_thread(tid);
+ Predicate * selected_branch = get_selected_child_branch(tid);
+ update_predicate_score(selected_branch, 4);
+
model_print("** thread %d is woken up\n", tid);
}
return finds_waiting_for;
}
+/* Update predicate counts and scores (asynchronous) when the read value is not available
+ *
+ * @param type
+ * type 1: find_threads return false
+ * type 2: find_threads return true, but the fuzzer decides that that thread shall not sleep based on sleep score
+ * type 3: threads are put to sleep but woken up before the waited value appears
+ * type 4: threads are put to sleep and the waited vaule appears (success)
+ */
+void NewFuzzer::update_predicate_score(Predicate * predicate, int type)
+{
+ switch (type) {
+ case 1:
+ predicate->incr_fail_count();
+
+ /* Do not choose this predicate when reselecting a new branch */
+ failed_predicates.put(predicate, true);
+ case 2:
+ predicate->incr_fail_count();
+ predicate->decr_sleep_score(1);
+ case 3:
+ predicate->incr_fail_count();
+ predicate->incr_sleep_score(10);
+ case 4:
+ predicate->decr_sleep_score(10);
+ }
+}
+
bool NewFuzzer::shouldWait(const ModelAction * act)
{
return random() & 1;