model: launch release sequence fixup actions when necessary

[model-checker.git] / model.cc

diff --git a/model.cc b/model.cc
index c5e41ab74c4be12cc8605860548abee71192a532..1fcb8fc0a2ab34b375d7c905e0f32c81699afef8 100644 (file)
--- a/model.cc
+++ b/model.cc
@@ -47,6 +47,10 @@ ModelChecker::ModelChecker(struct model_params params) :
        priv = (struct model_snapshot_members *)calloc(1, sizeof(*priv));
        /* First thread created will have id INITIAL_THREAD_ID */
        priv->next_thread_id = INITIAL_THREAD_ID;
+
+       /* Initialize a model-checker thread, for special ModelActions */
+       model_thread = new Thread(get_next_id());
+       thread_map->put(id_to_int(model_thread->get_id()), model_thread);
 }
 
 /** @brief Destructor */
@@ -1944,7 +1948,7 @@ bool ModelChecker::take_step() {
        if (has_asserted())
                return false;
 
-       Thread *curr = thread_current();
+       Thread *curr = priv->current_action ? get_thread(priv->current_action) : NULL;
        if (curr) {
                if (curr->get_state() == THREAD_READY) {
                        ASSERT(priv->current_action);
@@ -1967,6 +1971,18 @@ bool ModelChecker::take_step() {
        DEBUG("(%d, %d)\n", curr ? id_to_int(curr->get_id()) : -1,
                        next ? id_to_int(next->get_id()) : -1);
 
+       /* When no more threads, or when execution replay chooses the
+        * 'model_thread': launch end-of-execution release sequence fixups */
+       if (!pending_rel_seqs->empty() && (!next || next->is_model_thread())) {
+               printf("*** WARNING: release sequence fixup action (%zu pending release seuqences) ***\n",
+                               pending_rel_seqs->size());
+               ModelAction *fixup = new ModelAction(MODEL_FIXUP_RELSEQ,
+                               std::memory_order_seq_cst, NULL, VALUE_NONE,
+                               model_thread);
+               set_current_action(fixup);
+               return true;
+       }
+
        /* next == NULL -> don't take any more steps */
        if (!next)
                return false;