From: Brian Norris <banorris@uci.edu>
Date: Fri, 7 Dec 2012 06:03:53 +0000 (-0800)
Subject: model: add helper for allocating new UNINIT actions
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=19df39f5f8af9fbe0f67df290681e8663938aacc;p=c11tester.git

model: add helper for allocating new UNINIT actions

These UNINIT actions will be special; they won't enter the NodeStack,
and so they need to be snapshot-allocated. That way, they will roll-back
with the execution, instead of requiring manual deletion.
---

diff --git a/model.cc b/model.cc
index 3a1a7e23..771847ab 100644
--- a/model.cc
+++ b/model.cc
@@ -1,6 +1,7 @@
 #include <stdio.h>
 #include <algorithm>
 #include <mutex>
+#include <new>
 
 #include "model.h"
 #include "action.h"
@@ -2523,6 +2524,19 @@ bool ModelChecker::sleep_can_read_from(ModelAction * curr, const ModelAction *wr
 	}
 }
 
+/**
+ * @brief Create a new action representing an uninitialized atomic
+ * @param location The memory location of the atomic object
+ * @return A pointer to a new ModelAction
+ */
+ModelAction * ModelChecker::new_uninitialized_action(void *location) const
+{
+	ModelAction *act = (ModelAction *)snapshot_malloc(sizeof(class ModelAction));
+	act = new (act) ModelAction(ATOMIC_UNINIT, std::memory_order_relaxed, location, 0, model_thread);
+	act->create_cv(NULL);
+	return act;
+}
+
 static void print_list(action_list_t *list, int exec_num = -1)
 {
 	action_list_t::iterator it;
diff --git a/model.h b/model.h
index 5543eb8a..af6802a0 100644
--- a/model.h
+++ b/model.h
@@ -187,6 +187,8 @@ private:
 	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);
 
+	ModelAction * new_uninitialized_action(void *location) const;
+
 	ModelAction *diverge;
 	ModelAction *earliest_diverge;