+#define __STDC_FORMAT_MACROS
+#include <inttypes.h>
+#include <cstdlib>
+
#include <string.h>
#include "nodestack.h"
#include "action.h"
#include "common.h"
-#include "model.h"
#include "threads-model.h"
+#include "modeltypes.h"
+#include "execution.h"
+#include "params.h"
/**
* @brief Node constructor
* parent.
*
* @param act The ModelAction to associate with this Node. May be NULL.
- * @param par The parent Node in the NodeStack. May be NULL if there is no
- * parent.
* @param nthreads The number of threads which exist at this point in the
* execution trace.
*/
-Node::Node(ModelAction *act, Node *par, int nthreads, Node *prevfairness)
- : action(act),
- parent(par),
- num_threads(nthreads),
- explored_children(num_threads),
- backtrack(num_threads),
- fairness(num_threads),
- numBacktracks(0),
- enabled_array(NULL),
- may_read_from(),
- read_from_index(0),
- future_values(),
- future_index(-1),
- relseq_break_writes(),
- relseq_break_index(0),
- misc_index(0),
- misc_max(0)
+Node::Node(ModelAction *act) :
+ action(act),
+ uninit_action(NULL)
{
- if (act) {
- act->set_node(this);
- int currtid = id_to_int(act->get_tid());
- int prevtid = (prevfairness != NULL) ? id_to_int(prevfairness->action->get_tid()) : 0;
-
- if (model->params.fairwindow != 0) {
- for (int i = 0; i < nthreads; i++) {
- ASSERT(i < ((int)fairness.size()));
- struct fairness_info *fi = &fairness[i];
- struct fairness_info *prevfi = (par != NULL) && (i < par->get_num_threads()) ? &par->fairness[i] : NULL;
- if (prevfi) {
- *fi = *prevfi;
- }
- if (parent->is_enabled(int_to_id(i))) {
- fi->enabled_count++;
- }
- if (i == currtid) {
- fi->turns++;
- fi->priority = false;
- }
- /* Do window processing */
- if (prevfairness != NULL) {
- if (prevfairness->parent->is_enabled(int_to_id(i)))
- fi->enabled_count--;
- if (i == prevtid) {
- fi->turns--;
- }
- /* Need full window to start evaluating
- * conditions
- * If we meet the enabled count and
- * have no turns, give us priority */
- if ((fi->enabled_count >= model->params.enabledcount) &&
- (fi->turns == 0))
- fi->priority = true;
- }
- }
- }
- }
+ ASSERT(act);
+ act->set_node(this);
}
/** @brief Node desctructor */
Node::~Node()
{
- if (action)
- delete action;
- if (enabled_array)
- model_free(enabled_array);
+ delete action;
+ if (uninit_action)
+ delete uninit_action;
}
/** Prints debugging info for the ModelAction associated with this Node */
-void Node::print()
-{
- if (action)
- action->print();
- else
- model_print("******** empty action ********\n");
-}
-
-/** @brief Prints info about may_read_from set */
-void Node::print_may_read_from()
-{
- 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, bool is_rmw) {
- if (i >= promises.size())
- promises.resize(i + 1, PROMISE_IGNORE);
- if (promises[i] == PROMISE_IGNORE) {
- promises[i] = PROMISE_UNFULFILLED;
- if (is_rmw)
- promises[i] |= PROMISE_RMW;
- }
-}
-
-/**
- * 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) const
-{
- return (i < promises.size()) && ((promises[i] & PROMISE_MASK) == PROMISE_FULFILLED);
-}
-
-/**
- * Increments to the next combination of promises.
- * @return true if we have a valid combination.
- */
-bool Node::increment_promise() {
- DBG();
- unsigned int rmw_count = 0;
- for (unsigned int i = 0; i < promises.size(); i++) {
- if (promises[i] == (PROMISE_RMW|PROMISE_FULFILLED))
- rmw_count++;
- }
-
- for (unsigned int i = 0; i < promises.size(); i++) {
- if ((promises[i] & PROMISE_MASK) == PROMISE_UNFULFILLED) {
- if ((rmw_count > 0) && (promises[i] & PROMISE_RMW)) {
- //sending our value to two rmws... not going to work..try next combination
- continue;
- }
- promises[i] = (promises[i] & PROMISE_RMW) |PROMISE_FULFILLED;
- while (i > 0) {
- i--;
- if ((promises[i] & PROMISE_MASK) == PROMISE_FULFILLED)
- promises[i] = (promises[i] & PROMISE_RMW) | PROMISE_UNFULFILLED;
- }
- return true;
- } else if (promises[i] == (PROMISE_RMW|PROMISE_FULFILLED)) {
- rmw_count--;
- }
- }
- return false;
-}
-
-/**
- * Returns whether the promise set is empty.
- * @return true if we have explored all promise combinations.
- */
-bool Node::promise_empty() const
-{
- bool fulfilledrmw = false;
- for (int i = promises.size() - 1; i >= 0; i--) {
- if (promises[i] == PROMISE_UNFULFILLED)
- return false;
- if (!fulfilledrmw && ((promises[i]&PROMISE_MASK) == PROMISE_UNFULFILLED))
- return false;
- if (promises[i] == (PROMISE_FULFILLED|PROMISE_RMW))
- fulfilledrmw = true;
- }
- return true;
-}
-
-
-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
+void Node::print() const
{
- return (misc_index + 1) >= misc_max;
+ action->print();
}
-
-/**
- * Adds a value from a weakly ordered future write to backtrack to. This
- * operation may "fail" if the future value has already been run (within some
- * sloppiness window of this expiration), or if the futurevalues set has
- * reached its maximum.
- * @see model_params.maxfuturevalues
- *
- * @param value is the value to backtrack to.
- * @return True if the future value was successully added; false otherwise
- */
-bool Node::add_future_value(uint64_t value, modelclock_t expiration) {
- int idx = -1; /* Highest index where value is found */
- for (unsigned int i = 0; i < future_values.size(); i++) {
- if (future_values[i].value == value) {
- if (expiration <= future_values[i].expiration)
- return false;
- idx = i;
- }
- }
- if (idx > future_index) {
- /* Future value hasn't been explored; update expiration */
- future_values[idx].expiration = expiration;
- return true;
- } else if (idx >= 0 && expiration <= future_values[idx].expiration + model->params.expireslop) {
- /* Future value has been explored and is within the "sloppy" window */
- return false;
- }
-
- /* Limit the size of the future-values set */
- if (model->params.maxfuturevalues > 0 &&
- (int)future_values.size() >= model->params.maxfuturevalues)
- return false;
-
- 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() const
-{
- return ((future_index + 1) >= ((int)future_values.size()));
-}
-
-/**
- * Checks if the Thread associated with this thread ID has been explored from
- * this Node already.
- * @param tid is the thread ID to check
- * @return true if this thread choice has been explored already, false
- * otherwise
- */
-bool Node::has_been_explored(thread_id_t tid) const
-{
- int id = id_to_int(tid);
- return explored_children[id];
-}
-
-/**
- * Checks if the backtracking set is empty.
- * @return true if the backtracking set is empty
- */
-bool Node::backtrack_empty() const
-{
- return (numBacktracks == 0);
-}
-
-/**
- * Checks whether the readsfrom set for this node is empty.
- * @return true if the readsfrom set is empty.
- */
-bool Node::read_from_empty() const
-{
- return ((read_from_index + 1) >= may_read_from.size());
-}
-
-/**
- * Mark the appropriate backtracking information for exploring a thread choice.
- * @param act The ModelAction to explore
- */
-void Node::explore_child(ModelAction *act, enabled_type_t *is_enabled)
-{
- if (!enabled_array)
- enabled_array = (enabled_type_t *)model_malloc(sizeof(enabled_type_t) * num_threads);
- if (is_enabled != NULL)
- memcpy(enabled_array, is_enabled, sizeof(enabled_type_t) * num_threads);
- else {
- for (int i = 0; i < num_threads; i++)
- enabled_array[i] = THREAD_DISABLED;
- }
-
- explore(act->get_tid());
-}
-
-/**
- * Records a backtracking reference for a thread choice within this Node.
- * Provides feedback as to whether this thread choice is already set for
- * backtracking.
- * @return false if the thread was already set to be backtracked, true
- * otherwise
- */
-bool Node::set_backtrack(thread_id_t id)
-{
- int i = id_to_int(id);
- ASSERT(i < ((int)backtrack.size()));
- if (backtrack[i])
- return false;
- backtrack[i] = true;
- numBacktracks++;
- return true;
-}
-
-thread_id_t Node::get_next_backtrack()
-{
- /** @todo Find next backtrack */
- unsigned int i;
- for (i = 0; i < backtrack.size(); i++)
- if (backtrack[i] == true)
- break;
- /* Backtrack set was empty? */
- ASSERT(i != backtrack.size());
-
- backtrack[i] = false;
- numBacktracks--;
- return int_to_id(i);
-}
-
-bool Node::is_enabled(Thread *t) const
-{
- int thread_id = id_to_int(t->get_id());
- return thread_id < num_threads && (enabled_array[thread_id] != THREAD_DISABLED);
-}
-
-enabled_type_t Node::enabled_status(thread_id_t tid) const
-{
- int thread_id = id_to_int(tid);
- if (thread_id < num_threads)
- return enabled_array[thread_id];
- else
- return THREAD_DISABLED;
-}
-
-bool Node::is_enabled(thread_id_t tid) const
-{
- int thread_id = id_to_int(tid);
- return thread_id < num_threads && (enabled_array[thread_id] != THREAD_DISABLED);
-}
-
-bool Node::has_priority(thread_id_t tid) const
-{
- return fairness[id_to_int(tid)].priority;
-}
-
-/**
- * Add an action to the may_read_from set.
- * @param act is the action to add
- */
-void Node::add_read_from(const ModelAction *act)
-{
- may_read_from.push_back(act);
-}
-
-/**
- * Gets the next 'future_value' value from this Node. Only valid for a node
- * where this->action is a 'read'.
- * @return The first element in future_values
- */
-uint64_t Node::get_future_value() const
-{
- ASSERT(future_index >= 0 && future_index < ((int)future_values.size()));
- return future_values[future_index].value;
-}
-
-modelclock_t Node::get_future_value_expiration() const
-{
- ASSERT(future_index >= 0 && future_index < ((int)future_values.size()));
- return future_values[future_index].expiration;
-}
-
-
-int Node::get_read_from_size() const
-{
- 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'.
- * @return The first element in may_read_from
- */
-const ModelAction * Node::get_read_from() const
-{
- if (read_from_index < may_read_from.size())
- return may_read_from[read_from_index];
- else
- return NULL;
-}
-
-/**
- * Increments the index into the readsfrom set to explore the next item.
- * @return Returns false if we have explored all items.
- */
-bool Node::increment_read_from() {
- DBG();
- promises.clear();
- if (read_from_index < may_read_from.size()) {
- read_from_index++;
- return read_from_index < may_read_from.size();
- }
- return false;
-}
-
-/**
- * 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_value() {
- DBG();
- promises.clear();
- if (future_index < ((int)future_values.size())) {
- future_index++;
- return (future_index < ((int)future_values.size()));
- }
- return false;
-}
-
-/**
- * Add a write ModelAction to the set of writes that may break the release
- * sequence. This is used during replay exploration of pending release
- * sequences. This Node must correspond to a release sequence fixup action.
- *
- * @param write The write that may break the release sequence. NULL means we
- * allow the release sequence to synchronize.
- */
-void Node::add_relseq_break(const ModelAction *write)
-{
- relseq_break_writes.push_back(write);
-}
-
-/**
- * Get the write that may break the current pending release sequence,
- * according to the replay / divergence pattern.
- *
- * @return A write that may break the release sequence. If NULL, that means
- * the release sequence should not be broken.
- */
-const ModelAction * Node::get_relseq_break() const
+NodeStack::NodeStack() :
+ node_list(),
+ head_idx(-1)
{
- if (relseq_break_index < (int)relseq_break_writes.size())
- return relseq_break_writes[relseq_break_index];
- else
- return NULL;
}
-/**
- * Increments the index into the relseq_break_writes set to explore the next
- * item.
- * @return Returns false if we have explored all values.
- */
-bool Node::increment_relseq_break()
+NodeStack::~NodeStack()
{
- DBG();
- promises.clear();
- if (relseq_break_index < ((int)relseq_break_writes.size())) {
- relseq_break_index++;
- return (relseq_break_index < ((int)relseq_break_writes.size()));
- }
- return false;
+ for (unsigned int i = 0;i < node_list.size();i++)
+ delete node_list[i];
}
/**
- * @return True if all writes that may break the release sequence have been
- * explored
+ * @brief Register the model-checker object with this NodeStack
+ * @param exec The execution structure for the ModelChecker
*/
-bool Node::relseq_break_empty() const
+void NodeStack::register_engine(const ModelExecution *exec)
{
- return ((relseq_break_index + 1) >= ((int)relseq_break_writes.size()));
+ this->execution = exec;
}
-void Node::explore(thread_id_t tid)
+const struct model_params * NodeStack::get_params() const
{
- int i = id_to_int(tid);
- ASSERT(i < ((int)backtrack.size()));
- if (backtrack[i]) {
- backtrack[i] = false;
- numBacktracks--;
- }
- explored_children[i] = true;
-}
-
-NodeStack::NodeStack() :
- node_list(1, new Node()),
- head_idx(0),
- total_nodes(0)
-{
- total_nodes++;
-}
-
-NodeStack::~NodeStack()
-{
- for (unsigned int i = 0; i < node_list.size(); i++)
- delete node_list[i];
+ return execution->get_params();
}
void NodeStack::print() const
{
model_print("............................................\n");
model_print("NodeStack printing node_list:\n");
- for (unsigned int it = 0; it < node_list.size(); it++) {
+ for (unsigned int it = 0;it < node_list.size();it++) {
if ((int)it == this->head_idx)
model_print("vvv following action is the current iterator vvv\n");
node_list[it]->print();
/** Note: The is_enabled set contains what actions were enabled when
* act was chosen. */
-ModelAction * NodeStack::explore_action(ModelAction *act, enabled_type_t *is_enabled)
+ModelAction * NodeStack::explore_action(ModelAction *act)
{
DBG();
- ASSERT(!node_list.empty());
-
- if ((head_idx + 1) < (int)node_list.size()) {
- head_idx++;
- return node_list[head_idx]->get_action();
- }
-
- /* Record action */
- get_head()->explore_child(act, is_enabled);
- Node *prevfairness = NULL;
- if (model->params.fairwindow != 0 && head_idx > (int)model->params.fairwindow)
- prevfairness = node_list[head_idx - model->params.fairwindow];
- node_list.push_back(new Node(act, get_head(), model->get_num_threads(), prevfairness));
- total_nodes++;
+ node_list.push_back(new Node(act));
head_idx++;
return NULL;
}
-/**
- * Empties the stack of all trailing nodes after a given position and calls the
- * destructor for each. This function is provided an offset which determines
- * how many nodes (relative to the current replay state) to save before popping
- * the stack.
- * @param numAhead gives the number of Nodes (including this Node) to skip over
- * before removing nodes.
- */
-void NodeStack::pop_restofstack(int numAhead)
+
+/** Reset the node stack. */
+void NodeStack::full_reset()
{
- /* Diverging from previous execution; clear out remainder of list */
- unsigned int it = head_idx + numAhead;
- for (unsigned int i = it; i < node_list.size(); i++)
+ for (unsigned int i = 0;i < node_list.size();i++)
delete node_list[i];
- node_list.resize(it);
+ node_list.clear();
+ reset_execution();
}
Node * NodeStack::get_head() const
{
- if (node_list.empty())
+ if (node_list.empty() || head_idx < 0)
return NULL;
return node_list[head_idx];
}
void NodeStack::reset_execution()
{
- head_idx = 0;
+ head_idx = -1;
}
projects / c11tester.git / blobdiff