X-Git-Url: http://demsky.eecs.uci.edu/git/?a=blobdiff_plain;f=model.h;h=c99e0f8b424ddbe8079593713e498e53fe6fb80e;hb=a7f4b420cb8b12813d3feed76cf6af72b9803697;hp=dfc8e36c2be5e775ec82dab1e81a8adcfdaa2697;hpb=c832cb55af09e735821ae3463bc37c29d3fa27c8;p=model-checker.git

diff --git a/model.h b/model.h
index dfc8e36..c99e0f8 100644
--- a/model.h
+++ b/model.h
@@ -39,8 +39,7 @@ struct model_params {
 };
 
 struct PendingFutureValue {
-	uint64_t value;
-	modelclock_t expiration;
+	ModelAction *writer;
 	ModelAction * act;
 };
 
@@ -55,6 +54,19 @@ struct model_snapshot_members {
 	ModelAction *next_backtrack;
 };
 
+/** @brief Records information regarding a single pending release sequence */
+struct release_seq {
+	/** @brief The acquire operation */
+	ModelAction *acquire;
+	/** @brief The head of the RMW chain from which 'acquire' reads; may be
+	 *  equal to 'release' */
+	const ModelAction *rf;
+	/** @brief The head of the potential longest release sequence chain */
+	const ModelAction *release;
+	/** @brief The write(s) that may break the release sequence */
+	std::vector<const ModelAction *> writes;
+};
+
 /** @brief The central structure for model-checking */
 class ModelChecker {
 public:
@@ -105,13 +117,16 @@ private:
 	/** The scheduler to use: tracks the running/ready Threads */
 	Scheduler *scheduler;
 
+	bool sleep_can_read_from(ModelAction * curr, const ModelAction *write);
 	bool thin_air_constraint_may_allow(const ModelAction * writer, const ModelAction *reader);
+	bool mo_may_allow(const ModelAction * writer, const ModelAction *reader);
 	bool has_asserted() {return asserted;}
 	void reset_asserted() {asserted=false;}
 	int num_executions;
 	int num_feasible_executions;
 	bool promises_expired();
-
+	void execute_sleep_set();
+	void wake_up_sleeping_actions(ModelAction * curr);
 	modelclock_t get_next_seq_num();
 
 	/**
@@ -127,6 +142,7 @@ private:
 	bool process_write(ModelAction *curr);
 	bool process_mutex(ModelAction *curr);
 	bool process_thread_action(ModelAction *curr);
+	void process_relseq_fixup(ModelAction *curr, work_queue_t *work_queue);
 	bool check_action_enabled(ModelAction *curr);
 
 	bool take_step();
@@ -139,6 +155,7 @@ private:
 	void reset_to_initial_state();
 	bool resolve_promises(ModelAction *curr);
 	void compute_promises(ModelAction *curr);
+	void compute_relseq_breakwrites(ModelAction *curr);
 
 	void check_curr_backtracking(ModelAction * curr);
 	void add_action_to_lists(ModelAction *act);
@@ -150,7 +167,7 @@ private:
 	void post_r_modification_order(ModelAction *curr, const ModelAction *rf);
 	bool r_modification_order(ModelAction *curr, const ModelAction *rf);
 	bool w_modification_order(ModelAction *curr);
-	bool release_seq_heads(const ModelAction *rf, rel_heads_list_t *release_heads) const;
+	bool release_seq_heads(const ModelAction *rf, rel_heads_list_t *release_heads, struct release_seq *pending) const;
 	bool resolve_release_sequences(void *location, work_queue_t *work_queue);
 	void do_complete_join(ModelAction *join);
 
@@ -170,24 +187,28 @@ private:
 	HashTable<const void *, action_list_t, uintptr_t, 4> *lock_waiters_map;
 
 	HashTable<void *, std::vector<action_list_t>, uintptr_t, 4 > *obj_thrd_map;
-	std::vector<Promise *> *promises;
-	std::vector<struct PendingFutureValue> *futurevalues;
+	std::vector< Promise *, SnapshotAlloc<Promise *> > *promises;
+	std::vector< struct PendingFutureValue, SnapshotAlloc<struct PendingFutureValue> > *futurevalues;
 
 	/**
-	 * List of acquire actions that might synchronize with one or more
-	 * release sequence. Release sequences might be determined lazily as
-	 * promises are fulfilled and modification orders are established. Each
-	 * ModelAction in this list must be an acquire operation.
+	 * List of pending release sequences. Release sequences might be
+	 * determined lazily as promises are fulfilled and modification orders
+	 * are established. Each entry in the list may only be partially
+	 * filled, depending on its pending status.
 	 */
-	std::vector<ModelAction *> *pending_acq_rel_seq;
+	std::vector< struct release_seq *, SnapshotAlloc<struct release_seq *> > *pending_rel_seqs;
 
-	std::vector<ModelAction *> *thrd_last_action;
+	std::vector< ModelAction *, SnapshotAlloc<ModelAction *> > *thrd_last_action;
 	NodeStack *node_stack;
 
 	/** Private data members that should be snapshotted. They are grouped
 	 * together for efficiency and maintainability. */
 	struct model_snapshot_members *priv;
 
+	/** A special model-checker Thread; used for associating with
+	 *  model-checker-related ModelAcitons */
+	Thread *model_thread;
+
 	/**
 	 * @brief The modification order graph
 	 *