* @param nthreads The number of threads which exist at this point in the
* execution trace.
*/
-Node::Node(ModelAction *act, Node *par, int nthreads)
+Node::Node(ModelAction *act, Node *par, int nthreads, bool *enabled)
: action(act),
parent(par),
num_threads(nthreads),
may_read_from(),
read_from_index(0),
future_values(),
- future_index(0)
+ future_index(-1)
{
if (act)
act->set_node(this);
+ enabled_array=(bool *)MYMALLOC(sizeof(bool)*num_threads);
+ if (enabled != NULL)
+ memcpy(enabled_array, enabled, sizeof(bool)*num_threads);
+ else {
+ for(int i=0;i<num_threads;i++)
+ enabled_array[i]=false;
+ }
}
/** @brief Node desctructor */
{
if (action)
delete action;
+ MYFREE(enabled_array);
}
/** Prints debugging info for the ModelAction associated with this Node */
/** @brief Prints info about may_read_from set */
void Node::print_may_read_from()
{
- readfrom_set_t::iterator it;
- for (it = may_read_from.begin(); it != may_read_from.end(); it++)
- (*it)->print();
+ for (unsigned int i = 0; i < may_read_from.size(); i++)
+ may_read_from[i]->print();
+}
+
+/**
+ * Sets a promise to explore meeting with the given node.
+ * @param i is the promise index.
+ */
+void Node::set_promise(unsigned int i) {
+ if (i >= promises.size())
+ promises.resize(i + 1, PROMISE_IGNORE);
+ if (promises[i] == PROMISE_IGNORE)
+ promises[i] = PROMISE_UNFULFILLED;
+}
+
+/**
+ * Looks up whether a given promise should be satisfied by this node.
+ * @param i The promise index.
+ * @return true if the promise should be satisfied by the given model action.
+ */
+bool Node::get_promise(unsigned int i) {
+ return (i < promises.size()) && (promises[i] == PROMISE_FULFILLED);
+}
+
+/**
+ * Increments to the next combination of promises.
+ * @return true if we have a valid combination.
+ */
+bool Node::increment_promise() {
+ for (unsigned int i = 0; i < promises.size(); i++) {
+ if (promises[i] == PROMISE_UNFULFILLED) {
+ promises[i] = PROMISE_FULFILLED;
+ while (i > 0) {
+ i--;
+ if (promises[i] == PROMISE_FULFILLED)
+ promises[i] = PROMISE_UNFULFILLED;
+ }
+ return true;
+ }
+ }
+ return false;
+}
+
+/**
+ * Returns whether the promise set is empty.
+ * @return true if we have explored all promise combinations.
+ */
+bool Node::promise_empty() {
+ for (unsigned int i = 0; i < promises.size();i++)
+ if (promises[i] == PROMISE_UNFULFILLED)
+ return false;
+ return true;
}
/**
* Adds a value from a weakly ordered future write to backtrack to.
* @param value is the value to backtrack to.
*/
+bool Node::add_future_value(uint64_t value, modelclock_t expiration) {
+ int suitableindex=-1;
+ for (unsigned int i = 0; i < future_values.size(); i++) {
+ if (future_values[i].value == value) {
+ if (future_values[i].expiration>=expiration)
+ return false;
+ if (future_index < i) {
+ suitableindex=i;
+ }
+ }
+ }
-void Node::add_future_value(uint64_t value) {
- for(int i=0;i<future_values.size();i++)
- if (future_values[i]==value)
- return;
- future_values.push_back(value);
+ if (suitableindex!=-1) {
+ future_values[suitableindex].expiration=expiration;
+ return true;
+ }
+ struct future_value newfv={value, expiration};
+ future_values.push_back(newfv);
+ return true;
}
+/**
+ * Checks whether the future_values set for this node is empty.
+ * @return true if the future_values set is empty.
+ */
+bool Node::future_value_empty() {
+ return ((future_index + 1) >= future_values.size());
+}
/**
* Checks if the Thread associated with this thread ID has been explored from
return (numBacktracks == 0);
}
-
/**
* Checks whether the readsfrom set for this node is empty.
* @return true if the readsfrom set is empty.
*/
-bool Node::readsfrom_empty() {
- return ((read_from_index+1)>=may_read_from.size());
-}
-
-/**
- * Checks whether the future_values set for this node is empty.
- * @return true if the future_values set is empty.
- */
-
-bool Node::futurevalues_empty() {
- return ((future_index+1)>=future_values.size());
+bool Node::read_from_empty() {
+ return ((read_from_index+1) >= may_read_from.size());
}
/**
bool Node::is_enabled(Thread *t)
{
- return id_to_int(t->get_id()) < num_threads;
+ int thread_id=id_to_int(t->get_id());
+ return thread_id < num_threads && enabled_array[thread_id];
}
/**
* where this->action is a 'read'.
* @return The first element in future_values
*/
-
uint64_t Node::get_future_value() {
ASSERT(future_index<future_values.size());
- return future_values[future_index];
+ return future_values[future_index].value;
+}
+
+modelclock_t Node::get_future_value_expiration() {
+ ASSERT(future_index<future_values.size());
+ return future_values[future_index].expiration;
+}
+
+
+int Node::get_read_from_size() {
+ return may_read_from.size();
+}
+
+const ModelAction * Node::get_read_from_at(int i) {
+ return may_read_from[i];
}
/**
* Gets the next 'may_read_from' action from this Node. Only valid for a node
* where this->action is a 'read'.
- * @todo Perform reads_from backtracking/replay properly, so that this function
- * may remove elements from may_read_from
* @return The first element in may_read_from
*/
const ModelAction * Node::get_read_from() {
- ASSERT(read_from_index<may_read_from.size());
- return may_read_from[read_from_index];
+ if (read_from_index < may_read_from.size())
+ return may_read_from[read_from_index];
+ else
+ return NULL;
}
/**
*/
bool Node::increment_read_from() {
read_from_index++;
- return (read_from_index<may_read_from.size());
+ return (read_from_index < may_read_from.size());
}
/**
* Increments the index into the future_values set to explore the next item.
* @return Returns false if we have explored all values.
*/
-
-bool Node::increment_future_values() {
+bool Node::increment_future_value() {
future_index++;
- return (future_index<future_values.size());
+ return (future_index < future_values.size());
}
void Node::explore(thread_id_t tid)
}
static void clear_node_list(node_list_t *list, node_list_t::iterator start,
- node_list_t::iterator end)
+ node_list_t::iterator end)
{
node_list_t::iterator it;
printf("............................................\n");
}
-ModelAction * NodeStack::explore_action(ModelAction *act)
+ModelAction * NodeStack::explore_action(ModelAction *act, bool * is_enabled)
{
DBG();
/* Record action */
get_head()->explore_child(act);
- node_list.push_back(new Node(act, get_head(), model->get_num_threads()));
+ node_list.push_back(new Node(act, get_head(), model->get_num_threads(), is_enabled));
total_nodes++;
iter++;
return NULL;
projects / model-checker.git / blobdiff