}
}
+/**
+ * Returns last backtracking point. The model checker will explore a different
+ * path for this point in the next execution.
+ * @return The ModelAction at which the next execution should diverge.
+ */
ModelAction * ModelChecker::get_next_backtrack()
{
ModelAction *next = next_backtrack;
return;
}
+ if (curr->is_rmw()) {
+ //We have a RMW action
+ process_rmw(curr);
+ //Force the current thread to continue since the RMW should be atomic
+ nextThread = thread_current()->get_id();
+ delete curr;
+ return;
+ }
+
tmp = node_stack->explore_action(curr);
if (tmp) {
/* Discard duplicate ModelAction; use action from NodeStack */
th->set_creation(curr);
}
+ /* Is there a better interface for setting the next thread rather
+ than this field/convoluted approach? Perhaps like just returning
+ it or something? */
+
nextThread = get_next_replay_thread();
Node *currnode = curr->get_node();
set_backtracking(curr);
/* Assign reads_from values */
- /* TODO: perform release/acquire synchronization here; include
- * reads_from as ModelAction member? */
Thread *th = get_thread(curr->get_tid());
uint64_t value = VALUE_NONE;
if (curr->is_read()) {
add_action_to_lists(curr);
}
+/** @returns whether the current trace is feasible. */
bool ModelChecker::isfeasible() {
return !cyclegraph->checkForCycles();
}
+/** Process a RMW by converting previous read into a RMW. */
+void ModelChecker::process_rmw(ModelAction * act) {
+ int tid = id_to_int(act->get_tid());
+ ModelAction *lastread=get_last_action(tid);
+ lastread->upgrade_rmw(act);
+ cyclegraph->addRMWEdge(lastread->get_reads_from(),lastread);
+}
+
+/**
+ * Updates the cyclegraph with the constraints imposed from the current read.
+ * @param curr The current action. Must be a read.
+ * @param rf The action that curr reads from. Must be a write.
+ */
void ModelChecker::r_modification_order(ModelAction * curr, const ModelAction *rf) {
std::vector<action_list_t> *thrd_lists = &(*obj_thrd_map)[curr->get_location()];
unsigned int i;
}
}
+/**
+ * Updates the cyclegraph with the constraints imposed from the current write.
+ * @param curr The current action. Must be a write.
+ */
void ModelChecker::w_modification_order(ModelAction * curr) {
std::vector<action_list_t> *thrd_lists = &(*obj_thrd_map)[curr->get_location()];
unsigned int i;
return parent;
}
+/**
+ * Returns the clock vector for a given thread.
+ * @param tid The thread whose clock vector we want
+ * @return Desired clock vector
+ */
ClockVector * ModelChecker::get_cv(thread_id_t tid) {
return get_parent_action(tid)->get_cv();
}