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 createNewFlowNode(thisVarTuple);
49 thisVarNode = thisNode;
53 public Set<FlowNode> getNodeSet() {
57 public void addNeighbor(FlowNode node, FlowNode neighbor) {
58 Set<FlowNode> set = mapNodeToNeighborSet.get(node);
60 set = new HashSet<FlowNode>();
64 System.out.println("add a new neighbor " + neighbor + " to " + node);
67 public void addValueFlowEdge(NTuple<Descriptor> fromDescTuple, NTuple<Descriptor> toDescTuple) {
69 FlowNode fromNode = mapDescTupleToInferNode.get(fromDescTuple);
70 FlowNode toNode = mapDescTupleToInferNode.get(toDescTuple);
72 System.out.println("create an edge from " + fromNode + " to " + toNode);
74 int fromTupleSize = fromDescTuple.size();
75 NTuple<Descriptor> curTuple = new NTuple<Descriptor>();
76 for (int i = 0; i < fromTupleSize; i++) {
77 Descriptor desc = fromDescTuple.get(i);
79 addFlowEdge(getFlowNode(curTuple), toNode, fromDescTuple, toDescTuple);
82 int toTupleSize = toDescTuple.size();
83 curTuple = new NTuple<Descriptor>();
84 for (int i = 0; i < toTupleSize; i++) {
85 Descriptor desc = toDescTuple.get(i);
87 addFlowEdge(fromNode, getFlowNode(curTuple), fromDescTuple, toDescTuple);
92 private void addFlowEdge(FlowNode fromNode, FlowNode toNode, NTuple<Descriptor> initTuple,
93 NTuple<Descriptor> endTuple) {
95 FlowEdge edge = new FlowEdge(fromNode, toNode, initTuple, endTuple);
96 fromNode.addOutEdge(edge);
98 System.out.println("add a new edge=" + edge);
102 public FlowNode getFlowNode(NTuple<Descriptor> descTuple) {
103 if (mapDescTupleToInferNode.containsKey(descTuple)) {
104 return mapDescTupleToInferNode.get(descTuple);
106 FlowNode node = createNewFlowNode(descTuple);
111 public FlowNode getThisVarNode() {
115 public FlowNode createNewFlowNode(NTuple<Descriptor> tuple) {
117 if (!mapDescTupleToInferNode.containsKey(tuple)) {
118 FlowNode node = new FlowNode(tuple);
119 mapDescTupleToInferNode.put(tuple, node);
122 if (tuple.size() > 1) {
123 NTuple<Descriptor> baseTuple = tuple.subList(0, tuple.size() - 1);
124 getFlowNode(baseTuple).addFieldNode(node);
127 System.out.println("Creating new node=" + node);
130 return mapDescTupleToInferNode.get(tuple);
135 private void drawEdges(FlowNode node, BufferedWriter bw, Set<FlowNode> addedNodeSet,
136 Set<FlowEdge> addedEdgeSet) throws IOException {
138 Set<FlowEdge> edgeSet = node.getOutEdgeSet();
140 for (Iterator<FlowEdge> iterator = edgeSet.iterator(); iterator.hasNext();) {
141 FlowEdge flowEdge = iterator.next();
143 FlowNode u = flowEdge.getSrc();
144 FlowNode v = flowEdge.getDst();
146 if (u.getDescTuple().equals(flowEdge.getInitTuple())
147 && v.getDescTuple().equals(flowEdge.getEndTuple())) {
148 // only draw an edge of the actual value flow
150 if (!addedEdgeSet.contains(flowEdge)) {
152 if (!addedNodeSet.contains(u)) {
156 if (!addedNodeSet.contains(v)) {
161 bw.write("" + u.getID() + " -> " + v.getID() + ";\n");
162 addedEdgeSet.add(flowEdge);
170 private void drawNode(FlowNode node, BufferedWriter bw) throws IOException {
171 bw.write(node.getID() + " [label=\"" + node.getPrettyID() + "\"]" + ";\n");
174 public void writeGraph() throws java.io.IOException {
176 String graphName = md.toString();
177 graphName = graphName.replaceAll("[\\W]", "");
179 BufferedWriter bw = new BufferedWriter(new FileWriter(graphName + ".dot"));
180 bw.write("digraph " + graphName + " {\n");
181 bw.write("compound=true;\n");
183 // then visit every flow node
185 Iterator<FlowNode> iter = nodeSet.iterator();
187 Set<FlowEdge> addedEdgeSet = new HashSet<FlowEdge>();
188 Set<FlowNode> addedNodeSet = new HashSet<FlowNode>();
190 while (iter.hasNext()) {
191 FlowNode node = iter.next();
193 if (node.getDescTuple().size() == 1) {
194 // here, we just care about the local variable
195 if (node.getFieldNodeSet().size() > 0) {
196 drawSubgraph(node, bw, addedEdgeSet);
199 drawEdges(node, bw, addedNodeSet, addedEdgeSet);
208 public boolean constainsNode(FlowNode node) {
209 return nodeSet.contains(node);
212 private void drawSubgraph(FlowNode node, BufferedWriter bw, Set<FlowEdge> addedSet)
215 bw.write("subgraph cluster_" + node.getID() + "{\n");
216 bw.write("label=\"" + node.getPrettyID() + "\";\n");
218 Set<FlowNode> fieldNodeSet = node.getFieldNodeSet();
219 for (Iterator iterator = fieldNodeSet.iterator(); iterator.hasNext();) {
220 FlowNode fieldNode = (FlowNode) iterator.next();
221 if (fieldNode.getFieldNodeSet().size() > 0) {
222 drawSubgraph(fieldNode, bw, addedSet);
224 Descriptor desc = fieldNode.getDescTuple().getLastElement();
225 if (desc instanceof VarDescriptor) {
226 VarDescriptor varDesc = (VarDescriptor) desc;
227 if (varDesc.getType().isPrimitive()) {
228 bw.write(fieldNode.getID() + " [label=\"" + fieldNode.getPrettyID() + "\"];\n");
230 } else if (desc instanceof FieldDescriptor) {
231 FieldDescriptor fieldDesc = (FieldDescriptor) desc;
232 if (fieldDesc.getType().isPrimitive()) {
233 bw.write(fieldNode.getID() + " [label=\"" + fieldNode.getPrettyID() + "\"];\n");