X-Git-Url: http://demsky.eecs.uci.edu/git/?a=blobdiff_plain;f=cyclegraph.cc;h=321ebe9e2f242babe1adad4e233dd7fe51427e71;hb=8497408d26002ec1a9d7cfd42458f92f2cdd9864;hp=f134822f2d72a8b8bed600a53ef765a4cb8b61f2;hpb=f6c5b783a43b8b5d8d069e44ecf91cc770b5d47b;p=model-checker.git

diff --git a/cyclegraph.cc b/cyclegraph.cc
index f134822..321ebe9 100644
--- a/cyclegraph.cc
+++ b/cyclegraph.cc
@@ -25,6 +25,9 @@ CycleNode * CycleGraph::getNode(const ModelAction *action) {
 	if (node==NULL) {
 		node=new CycleNode(action);
 		actionToNode.put(action, node);
+#if SUPPORT_MOD_ORDER_DUMP
+		nodeList.push_back(node);
+#endif
 	}
 	return node;
 }
@@ -38,6 +41,7 @@ CycleNode * CycleGraph::getNode(const ModelAction *action) {
 void CycleGraph::addEdge(const ModelAction *from, const ModelAction *to) {
 	ASSERT(from);
 	ASSERT(to);
+	ASSERT(from != to);
 
 	CycleNode *fromnode=getNode(from);
 	CycleNode *tonode=getNode(to);
@@ -47,21 +51,27 @@ void CycleGraph::addEdge(const ModelAction *from, const ModelAction *to) {
 		hasCycles=checkReachable(tonode, fromnode);
 	}
 
-	rollbackvector.push_back(fromnode);
-	fromnode->addEdge(tonode);
+	if (fromnode->addEdge(tonode))
+		rollbackvector.push_back(fromnode);
+
 
 	CycleNode * rmwnode=fromnode->getRMW();
 
 	//If the fromnode has a rmwnode that is not the tonode, we
 	//should add an edge between its rmwnode and the tonode
 
-	if (rmwnode!=NULL&&rmwnode!=tonode) {
+	//If tonode is also a rmw, don't do this check as the execution is
+	//doomed and we'll catch the problem elsewhere, but we want to allow
+	//for the possibility of sending to's write value to rmwnode
+
+	if (rmwnode!=NULL&&!to->is_rmw()) {
 		if (!hasCycles) {
 			// Check for Cycles
 			hasCycles=checkReachable(tonode, rmwnode);
 		}
-		rollbackvector.push_back(rmwnode);
-		rmwnode->addEdge(tonode);
+
+		if (rmwnode->addEdge(tonode))
+			rollbackvector.push_back(rmwnode);
 	}
 }
 
@@ -73,6 +83,7 @@ void CycleGraph::addEdge(const ModelAction *from, const ModelAction *to) {
 void CycleGraph::addRMWEdge(const ModelAction *from, const ModelAction *rmw) {
 	ASSERT(from);
 	ASSERT(rmw);
+	ASSERT(from != rmw);
 
 	CycleNode *fromnode=getNode(from);
 	CycleNode *rmwnode=getNode(rmw);
@@ -94,18 +105,50 @@ void CycleGraph::addRMWEdge(const ModelAction *from, const ModelAction *rmw) {
 	std::vector<CycleNode *> * edges=fromnode->getEdges();
 	for(unsigned int i=0;i<edges->size();i++) {
 		CycleNode * tonode=(*edges)[i];
-		rollbackvector.push_back(rmwnode);
-		rmwnode->addEdge(tonode);
+		if (tonode!=rmwnode) {
+			if (rmwnode->addEdge(tonode))
+				rollbackvector.push_back(rmwnode);
+		}
 	}
-	rollbackvector.push_back(fromnode);
+
 
 	if (!hasCycles) {
 		// With promises we could be setting up a cycle here if we aren't
 		// careful...avoid it..
 		hasCycles=checkReachable(rmwnode, fromnode);
 	}
-	fromnode->addEdge(rmwnode);
+	if(fromnode->addEdge(rmwnode))
+		rollbackvector.push_back(fromnode);
+}
+
+#if SUPPORT_MOD_ORDER_DUMP
+void CycleGraph::dumpNodes(FILE *file) {
+  for(unsigned int i=0;i<nodeList.size();i++) {
+		CycleNode *cn=nodeList[i];
+		std::vector<CycleNode *> * edges=cn->getEdges();
+		const ModelAction *action=cn->getAction();
+		fprintf(file, "N%u [label=\"%u, T%u\"];\n",action->get_seq_number(),action->get_seq_number(), action->get_tid());
+		if (cn->getRMW()!=NULL) {
+			fprintf(file, "N%u -> N%u[style=dotted];\n", action->get_seq_number(), cn->getRMW()->getAction()->get_seq_number());
+		}
+		for(unsigned int j=0;j<edges->size();j++) {
+		  CycleNode *dst=(*edges)[j];
+			const ModelAction *dstaction=dst->getAction();
+      fprintf(file, "N%u -> N%u;\n", action->get_seq_number(), dstaction->get_seq_number());
+	  }
+	}
+}
+
+void CycleGraph::dumpGraphToFile(const char *filename) {
+	char buffer[200];
+  sprintf(buffer, "%s.dot",filename);
+  FILE *file=fopen(buffer, "w");
+  fprintf(file, "digraph %s {\n",filename);
+	dumpNodes(file);
+  fprintf(file,"}\n");
+  fclose(file);	
 }
+#endif
 
 /**
  * Checks whether one ModelAction can reach another.
@@ -130,8 +173,8 @@ bool CycleGraph::checkReachable(const ModelAction *from, const ModelAction *to)
  * @return True, @a from can reach @a to; otherwise, false
  */
 bool CycleGraph::checkReachable(CycleNode *from, CycleNode *to) {
-	std::vector<CycleNode *> queue;
-	HashTable<CycleNode *, CycleNode *, uintptr_t, 4> discovered;
+	std::vector<CycleNode *, MyAlloc<CycleNode *> > queue;
+	HashTable<CycleNode *, CycleNode *, uintptr_t, 4, model_malloc, model_calloc, model_free> discovered;
 
 	queue.push_back(from);
 	discovered.put(from, from);
@@ -211,8 +254,12 @@ std::vector<CycleNode *> * CycleNode::getEdges() {
  * Adds an edge from this CycleNode to another CycleNode.
  * @param node The node to which we add a directed edge
  */
-void CycleNode::addEdge(CycleNode *node) {
+bool CycleNode::addEdge(CycleNode *node) {
+	for(unsigned int i=0;i<edges.size();i++)
+		if (edges[i]==node)
+			return false;
 	edges.push_back(node);
+	return true;
 }
 
 /** @returns the RMW CycleNode that reads from the current CycleNode */