Node::Node(ModelAction *act, Node *par, int nthreads, Node *prevfairness) :
read_from_status(READ_FROM_PAST),
action(act),
+ uninit_action(NULL),
parent(par),
num_threads(nthreads),
explored_children(num_threads),
}
void Node::update_yield(Scheduler * scheduler) {
- yield_data=(int *) model_calloc(1, sizeof(int)*num_threads*num_threads);
+ if (yield_data==NULL)
+ yield_data=(int *) model_calloc(1, sizeof(int)*num_threads*num_threads);
//handle base case
if (parent == NULL) {
for(int i = 0; i < num_threads*num_threads; i++) {
Node::~Node()
{
delete action;
+ if (uninit_action)
+ delete uninit_action;
if (enabled_array)
model_free(enabled_array);
if (yield_data)
model_print(" rel seq break: %s\n", relseq_break_empty() ? "empty" : "non-empty");
}
-/*********************************** promise **********************************/
-
-/**
- * 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 >= resolve_promise.size())
- resolve_promise.resize(i + 1, false);
- resolve_promise[i] = true;
-}
-
-/**
- * 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 ModelAction.
- */
-bool Node::get_promise(unsigned int i) const
-{
- return (i < resolve_promise.size()) && (int)i == resolve_promise_idx;
-}
-
-/**
- * Increments to the next promise to resolve.
- * @return true if we have a valid combination.
- */
-bool Node::increment_promise()
-{
- DBG();
- if (resolve_promise.empty())
- return false;
- int prev_idx = resolve_promise_idx;
- resolve_promise_idx++;
- for ( ; resolve_promise_idx < (int)resolve_promise.size(); resolve_promise_idx++)
- if (resolve_promise[resolve_promise_idx])
- return true;
- resolve_promise_idx = prev_idx;
- return false;
-}
-
-/**
- * Returns whether the promise set is empty.
- * @return true if we have explored all promise combinations.
- */
-bool Node::promise_empty() const
-{
- for (int i = resolve_promise_idx + 1; i < (int)resolve_promise.size(); i++)
- if (i >= 0 && resolve_promise[i])
- return false;
- return true;
-}
-
-/** @brief Clear any promise-resolution information for this Node */
-void Node::clear_promise_resolutions()
-{
- resolve_promise.clear();
- resolve_promise_idx = -1;
-}
-
-/******************************* end promise **********************************/
-
-void Node::set_misc_max(int i)
-{
- misc_max = i;
-}
-
-int Node::get_misc() const
-{
- return misc_index;
-}
-
-bool Node::increment_misc()
-{
- return (misc_index < misc_max) && ((++misc_index) < misc_max);
-}
-
-bool Node::misc_empty() const
-{
- return (misc_index + 1) >= misc_max;
-}
+/****************************** threads backtracking **************************/
/**
* Checks if the Thread associated with this thread ID has been explored from
return (numBacktracks == 0);
}
+void Node::explore(thread_id_t tid)
+{
+ int i = id_to_int(tid);
+ ASSERT(i < ((int)backtrack.size()));
+ if (backtrack[i]) {
+ backtrack[i] = false;
+ numBacktracks--;
+ }
+ explored_children[i] = true;
+}
+
/**
* Mark the appropriate backtracking information for exploring a thread choice.
* @param act The ModelAction to explore
numBacktracks = 0;
}
+/************************** end threads backtracking **************************/
+
+/*********************************** promise **********************************/
+
+/**
+ * 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 >= resolve_promise.size())
+ resolve_promise.resize(i + 1, false);
+ resolve_promise[i] = true;
+}
+
+/**
+ * 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 ModelAction.
+ */
+bool Node::get_promise(unsigned int i) const
+{
+ return (i < resolve_promise.size()) && (int)i == resolve_promise_idx;
+}
+
+/**
+ * Increments to the next promise to resolve.
+ * @return true if we have a valid combination.
+ */
+bool Node::increment_promise()
+{
+ DBG();
+ if (resolve_promise.empty())
+ return false;
+ int prev_idx = resolve_promise_idx;
+ resolve_promise_idx++;
+ for ( ; resolve_promise_idx < (int)resolve_promise.size(); resolve_promise_idx++)
+ if (resolve_promise[resolve_promise_idx])
+ return true;
+ resolve_promise_idx = prev_idx;
+ return false;
+}
+
+/**
+ * Returns whether the promise set is empty.
+ * @return true if we have explored all promise combinations.
+ */
+bool Node::promise_empty() const
+{
+ for (int i = resolve_promise_idx + 1; i < (int)resolve_promise.size(); i++)
+ if (i >= 0 && resolve_promise[i])
+ return false;
+ return true;
+}
+
+/** @brief Clear any promise-resolution information for this Node */
+void Node::clear_promise_resolutions()
+{
+ resolve_promise.clear();
+ resolve_promise_idx = -1;
+}
+
+/******************************* end promise **********************************/
+
+void Node::set_misc_max(int i)
+{
+ misc_max = i;
+}
+
+int Node::get_misc() const
+{
+ return misc_index;
+}
+
+bool Node::increment_misc()
+{
+ return (misc_index < misc_max) && ((++misc_index) < misc_max);
+}
+
+bool Node::misc_empty() const
+{
+ return (misc_index + 1) >= misc_max;
+}
+
bool Node::is_enabled(Thread *t) const
{
int thread_id = id_to_int(t->get_id());
/************************** end future values *********************************/
+/*********************** breaking release sequences ***************************/
+
/**
* Add a write ModelAction to the set of writes that may break the release
* sequence. This is used during replay exploration of pending release
return ((relseq_break_index + 1) >= ((int)relseq_break_writes.size()));
}
-void Node::explore(thread_id_t tid)
+/******************* end breaking release sequences ***************************/
+
+/**
+ * Increments some behavior's index, if a new behavior is available
+ * @return True if there is a new behavior available; otherwise false
+ */
+bool Node::increment_behaviors()
{
- int i = id_to_int(tid);
- ASSERT(i < ((int)backtrack.size()));
- if (backtrack[i]) {
- backtrack[i] = false;
- numBacktracks--;
- }
- explored_children[i] = true;
+ /* satisfy a different misc_index values */
+ if (increment_misc())
+ return true;
+ /* satisfy a different set of promises */
+ if (increment_promise())
+ return true;
+ /* read from a different value */
+ if (increment_read_from())
+ return true;
+ /* resolve a release sequence differently */
+ if (increment_relseq_break())
+ return true;
+ return false;
}
NodeStack::NodeStack() :
projects / cdsspec-compiler.git / blobdiff