1 package Analysis.SSJava;
3 import java.io.BufferedWriter;
5 import java.io.FileWriter;
6 import java.io.IOException;
7 import java.util.HashMap;
8 import java.util.HashSet;
9 import java.util.Iterator;
12 import java.util.Map.Entry;
14 import Analysis.OoOJava.ConflictEdge;
15 import Analysis.OoOJava.ConflictNode;
17 import IR.FieldDescriptor;
18 import IR.MethodDescriptor;
19 import IR.VarDescriptor;
21 public class FlowGraph {
25 Set<FlowNode> nodeSet;
28 // maps the composite representation of field/var descriptors to infer nodes
29 Map<NTuple<Descriptor>, FlowNode> mapDescTupleToInferNode;
31 // maps an infer node to the set of neighbors which is pointed by the node
32 Map<NTuple<Descriptor>, Set<FlowNode>> mapNodeToNeighborSet;
36 public FlowGraph(MethodDescriptor md) {
38 nodeSet = new HashSet<FlowNode>();
39 mapDescTupleToInferNode = new HashMap<NTuple<Descriptor>, FlowNode>();
40 mapNodeToNeighborSet = new HashMap<NTuple<Descriptor>, Set<FlowNode>>();
42 // create a node for 'this' varialbe
43 NTuple<Descriptor> thisDescTuple = new NTuple<Descriptor>();
44 thisDescTuple.add(md.getThis());
45 FlowNode thisNode = new FlowNode(thisDescTuple);
46 NTuple<Descriptor> thisVarTuple = new NTuple<Descriptor>();
47 thisVarTuple.add(md.getThis());
48 mapDescTupleToInferNode.put(thisVarTuple, thisNode);
49 thisVarNode = thisNode;
53 public void addNeighbor(FlowNode node, FlowNode neighbor) {
54 Set<FlowNode> set = mapNodeToNeighborSet.get(node);
56 set = new HashSet<FlowNode>();
60 System.out.println("add a new neighbor " + neighbor + " to " + node);
63 public void addValueFlowEdge(NTuple<Descriptor> fromDescTuple, NTuple<Descriptor> toDescTuple) {
65 FlowNode fromNode = mapDescTupleToInferNode.get(fromDescTuple);
66 FlowNode toNode = mapDescTupleToInferNode.get(toDescTuple);
68 System.out.println("create an edge from " + fromNode + " to " + toNode);
70 int fromTupleSize = fromDescTuple.size();
71 NTuple<Descriptor> curTuple = new NTuple<Descriptor>();
72 for (int i = 0; i < fromTupleSize; i++) {
73 Descriptor desc = fromDescTuple.get(i);
75 addFlowEdge(getFlowNode(curTuple), toNode, fromDescTuple, toDescTuple);
78 int toTupleSize = toDescTuple.size();
79 curTuple = new NTuple<Descriptor>();
80 for (int i = 0; i < toTupleSize; i++) {
81 Descriptor desc = toDescTuple.get(i);
83 addFlowEdge(fromNode, getFlowNode(curTuple), fromDescTuple, toDescTuple);
88 private void addFlowEdge(FlowNode fromNode, FlowNode toNode, NTuple<Descriptor> initTuple,
89 NTuple<Descriptor> endTuple) {
91 FlowEdge edge = new FlowEdge(fromNode, toNode, initTuple, endTuple);
92 fromNode.addOutEdge(edge);
94 System.out.println("add a new edge=" + edge);
98 public FlowNode getFlowNode(NTuple<Descriptor> descTuple) {
99 if (mapDescTupleToInferNode.containsKey(descTuple)) {
100 return mapDescTupleToInferNode.get(descTuple);
102 FlowNode node = createNewFlowNode(descTuple);
107 public FlowNode getThisVarNode() {
111 public FlowNode createNewFlowNode(NTuple<Descriptor> tuple) {
113 if (!mapDescTupleToInferNode.containsKey(tuple)) {
114 FlowNode node = new FlowNode(tuple);
115 mapDescTupleToInferNode.put(tuple, node);
118 if (tuple.size() > 1) {
119 NTuple<Descriptor> baseTuple = tuple.subList(0, tuple.size() - 1);
120 getFlowNode(baseTuple).addFieldNode(node);
123 System.out.println("Creating new node=" + node);
126 return mapDescTupleToInferNode.get(tuple);
131 private void drawEdges(FlowNode node, BufferedWriter bw, Set<FlowNode> addedNodeSet,
132 Set<FlowEdge> addedEdgeSet) throws IOException {
134 Set<FlowEdge> edgeSet = node.getOutEdgeSet();
136 for (Iterator<FlowEdge> iterator = edgeSet.iterator(); iterator.hasNext();) {
137 FlowEdge flowEdge = iterator.next();
139 FlowNode u = flowEdge.getSrc();
140 FlowNode v = flowEdge.getDst();
142 if (u.getDescTuple().equals(flowEdge.getInitTuple())
143 && v.getDescTuple().equals(flowEdge.getEndTuple())) {
144 // only draw an edge of the actual value flow
146 if (!addedEdgeSet.contains(flowEdge)) {
148 if (!addedNodeSet.contains(u)) {
152 if (!addedNodeSet.contains(v)) {
157 bw.write("" + u.getID() + " -> " + v.getID() + ";\n");
158 addedEdgeSet.add(flowEdge);
166 private void drawNode(FlowNode node, BufferedWriter bw) throws IOException {
167 bw.write(node.getID() + " [label=\"" + node.getPrettyID() + "\"]" + ";\n");
170 public void writeGraph() throws java.io.IOException {
172 String graphName = md.toString();
173 graphName = graphName.replaceAll("[\\W]", "");
175 BufferedWriter bw = new BufferedWriter(new FileWriter(graphName + ".dot"));
176 bw.write("digraph " + graphName + " {\n");
177 bw.write("compound=true;\n");
179 // then visit every flow node
181 Iterator<FlowNode> iter = nodeSet.iterator();
183 Set<FlowEdge> addedEdgeSet = new HashSet<FlowEdge>();
184 Set<FlowNode> addedNodeSet = new HashSet<FlowNode>();
186 while (iter.hasNext()) {
187 FlowNode node = iter.next();
189 if (node.getDescTuple().size() == 1) {
190 // here, we just care about the local variable
191 if (node.getFieldNodeSet().size() > 0) {
192 drawSubgraph(node, bw, addedEdgeSet);
195 drawEdges(node, bw, addedNodeSet, addedEdgeSet);
204 public boolean constainsNode(FlowNode node) {
205 return nodeSet.contains(node);
208 private void drawSubgraph(FlowNode node, BufferedWriter bw, Set<FlowEdge> addedSet)
211 bw.write("subgraph cluster_" + node.getID() + "{\n");
212 bw.write("label=\"" + node.getPrettyID() + "\";\n");
214 Set<FlowNode> fieldNodeSet = node.getFieldNodeSet();
215 for (Iterator iterator = fieldNodeSet.iterator(); iterator.hasNext();) {
216 FlowNode fieldNode = (FlowNode) iterator.next();
217 if (fieldNode.getFieldNodeSet().size() > 0) {
218 drawSubgraph(fieldNode, bw, addedSet);
220 Descriptor desc = fieldNode.getDescTuple().getLastElement();
221 if (desc instanceof VarDescriptor) {
222 VarDescriptor varDesc = (VarDescriptor) desc;
223 if (varDesc.getType().isPrimitive()) {
224 bw.write(fieldNode.getID() + " [label=\"" + fieldNode.getPrettyID() + "\"];\n");
226 } else if (desc instanceof FieldDescriptor) {
227 FieldDescriptor fieldDesc = (FieldDescriptor) desc;
228 if (fieldDesc.getType().isPrimitive()) {
229 bw.write(fieldNode.getID() + " [label=\"" + fieldNode.getPrettyID() + "\"];\n");