package Analysis.SSJava;
+import java.io.BufferedWriter;
+import java.io.FileWriter;
+import java.io.IOException;
import java.util.HashMap;
import java.util.HashSet;
+import java.util.Iterator;
import java.util.Map;
import java.util.Set;
+import IR.ClassDescriptor;
import IR.Descriptor;
+import IR.FieldDescriptor;
import IR.MethodDescriptor;
+import IR.VarDescriptor;
public class FlowGraph {
MethodDescriptor md;
- Set<FlowNode> nodeSet;
+ Set<FlowNode> returnNodeSet;
FlowNode thisVarNode;
+ Map<FlowNode, Set<FlowEdge>> mapFlowNodeToInEdgeSet;
+ Map<FlowNode, Set<FlowEdge>> mapFlowNodeToOutEdgeSet;
+
+ Map<NTuple<Location>, FlowNode> mapLocTupleToFlowNode;
+ Map<FlowNode, NTuple<Location>> mapFlowNodeToLocTuple;
+
// maps the composite representation of field/var descriptors to infer nodes
Map<NTuple<Descriptor>, FlowNode> mapDescTupleToInferNode;
- // maps an infer node to the set of neighbors which is pointed by the node
- Map<NTuple<Descriptor>, Set<FlowNode>> mapNodeToNeighborSet;
+ // maps a paramter descriptor to its index
+ Map<Descriptor, Integer> mapParamDescToIdx;
+
+ // DS for the lattice generation
+ Map<Integer, FlowNode> mapIdxToFlowNode;
+
+ public static int interseed = 0;
boolean debug = true;
- public FlowGraph(MethodDescriptor md) {
+ public FlowGraph(MethodDescriptor md, Map<Descriptor, Integer> mapParamDescToIdx) {
this.md = md;
- nodeSet = new HashSet<FlowNode>();
- mapDescTupleToInferNode = new HashMap<NTuple<Descriptor>, FlowNode>();
- mapNodeToNeighborSet = new HashMap<NTuple<Descriptor>, Set<FlowNode>>();
+ this.mapFlowNodeToLocTuple = new HashMap<FlowNode, NTuple<Location>>();
+ this.mapLocTupleToFlowNode = new HashMap<NTuple<Location>, FlowNode>();
+ this.mapDescTupleToInferNode = new HashMap<NTuple<Descriptor>, FlowNode>();
+ this.mapParamDescToIdx = new HashMap<Descriptor, Integer>();
+ this.mapParamDescToIdx.putAll(mapParamDescToIdx);
+ this.returnNodeSet = new HashSet<FlowNode>();
+ this.mapIdxToFlowNode = new HashMap<Integer, FlowNode>();
+ this.mapFlowNodeToOutEdgeSet = new HashMap<FlowNode, Set<FlowEdge>>();
+ this.mapFlowNodeToInEdgeSet = new HashMap<FlowNode, Set<FlowEdge>>();
+
+ if (!md.isStatic()) {
+ // create a node for 'this' varialbe
+ // NTuple<Descriptor> thisDescTuple = new NTuple<Descriptor>();
+ // thisDescTuple.add(md.getThis());
+
+ NTuple<Descriptor> thisVarTuple = new NTuple<Descriptor>();
+ thisVarTuple.add(md.getThis());
+ FlowNode thisNode = createNewFlowNode(thisVarTuple);
+ thisNode.setSkeleton(true);
+ thisVarNode = thisNode;
+ }
+
+ setupMapIdxToDesc();
- // create a node for 'this' varialbe
- FlowNode thisNode = new FlowNode(null, md.getThis());
- NTuple<Descriptor> thisVarTuple = new NTuple<Descriptor>();
- thisVarTuple.add(md.getThis());
- mapDescTupleToInferNode.put(thisVarTuple, thisNode);
- thisVarNode = thisNode;
+ }
+
+ public Map<NTuple<Descriptor>, FlowNode> getMapDescTupleToInferNode() {
+ return mapDescTupleToInferNode;
+ }
+
+ public void setMapDescTupleToInferNode(Map<NTuple<Descriptor>, FlowNode> in) {
+ this.mapDescTupleToInferNode.putAll(in);
+ }
+
+ public Map<NTuple<Location>, FlowNode> getMapLocTupleToFlowNode() {
+ return mapLocTupleToFlowNode;
+ }
+ public void setMapLocTupleToFlowNode(Map<NTuple<Location>, FlowNode> in) {
+ this.mapLocTupleToFlowNode.putAll(in);
}
- public void addNeighbor(FlowNode node, FlowNode neighbor) {
- Set<FlowNode> set = mapNodeToNeighborSet.get(node);
- if (set == null) {
- set = new HashSet<FlowNode>();
+ public void setReturnNodeSet(Set<FlowNode> in) {
+ this.returnNodeSet.addAll(in);
+ }
+
+ public void setThisVarNode(FlowNode thisVarNode) {
+ this.thisVarNode = thisVarNode;
+ }
+
+ public Map<Descriptor, Integer> getMapParamDescToIdx() {
+ return mapParamDescToIdx;
+ }
+
+ public FlowNode createIntermediateNode() {
+ NTuple<Descriptor> tuple = new NTuple<Descriptor>();
+ Descriptor interDesc = new InterDescriptor(LocationInference.INTERLOC + interseed);
+ tuple.add(interDesc);
+ interseed++;
+
+ FlowNode newNode = new FlowNode(tuple);
+ newNode.setIntermediate(true);
+
+ mapDescTupleToInferNode.put(tuple, newNode);
+ // nodeSet.add(newNode);
+
+ System.out.println("create new intermediate node= " + newNode);
+
+ return newNode;
+ }
+
+ private void setupMapIdxToDesc() {
+
+ Set<Descriptor> descSet = mapParamDescToIdx.keySet();
+ for (Iterator iterator = descSet.iterator(); iterator.hasNext();) {
+ Descriptor paramDesc = (Descriptor) iterator.next();
+ int idx = mapParamDescToIdx.get(paramDesc);
+ NTuple<Descriptor> descTuple = new NTuple<Descriptor>();
+ descTuple.add(paramDesc);
+ FlowNode paramNode = getFlowNode(descTuple);
+ mapIdxToFlowNode.put(idx, paramNode);
+ paramNode.setSkeleton(true);
}
- set.add(neighbor);
- System.out.println("add a new neighbor " + neighbor + " to " + node);
}
- public void addValueFlowEdge(NTuple<Descriptor> fromDescTuple, NTuple<Descriptor> toDescTuple) {
+ public int getNumParameters() {
+ return mapIdxToFlowNode.keySet().size();
+ }
+
+ public FlowNode getParamFlowNode(int idx) {
+ return mapIdxToFlowNode.get(idx);
+ }
+
+ public Set<FlowEdge> getEdgeSet() {
+ Set<FlowEdge> edgeSet = new HashSet<FlowEdge>();
+
+ Set<FlowNode> nodeSet = getNodeSet();
+ for (Iterator iterator = nodeSet.iterator(); iterator.hasNext();) {
+ FlowNode flowNode = (FlowNode) iterator.next();
+ edgeSet.addAll(getOutEdgeSet(flowNode));
+ }
+
+ return edgeSet;
+ }
+
+ public Set<FlowNode> getNodeSet() {
+ Set<FlowNode> set = new HashSet<FlowNode>();
+ set.addAll(mapDescTupleToInferNode.values());
+ return set;
+ }
+
+ public MethodDescriptor getMethodDescriptor() {
+ return md;
+ }
+
+ public boolean isParamDesc(Descriptor desc) {
+
+ if (mapParamDescToIdx.containsKey(desc)) {
+ int idx = mapParamDescToIdx.get(desc);
+ if (!md.isStatic() && idx == 0) {
+ return false;
+ }
+ return true;
+ }
+
+ return false;
+ }
+
+ public boolean hasEdge(NTuple<Descriptor> fromDescTuple, NTuple<Descriptor> toDescTuple) {
FlowNode fromNode = mapDescTupleToInferNode.get(fromDescTuple);
FlowNode toNode = mapDescTupleToInferNode.get(toDescTuple);
- System.out.println("create an edge from " + fromNode + " to " + toNode);
+ Set<FlowEdge> fromNodeOutEdgeSet = getOutEdgeSet(fromNode);
+ for (Iterator iterator = fromNodeOutEdgeSet.iterator(); iterator.hasNext();) {
+ FlowEdge flowEdge = (FlowEdge) iterator.next();
+ if (flowEdge.getDst().equals(toNode)) {
+ return true;
+ } else {
+ if (hasEdge(flowEdge.getDst().getDescTuple(), toDescTuple)) {
+ return true;
+ }
+ }
+ }
+
+ return false;
+ }
+
+ public Set<FlowEdge> getOutEdgeSetStartingFrom(FlowNode startNode) {
+
+ Descriptor prefixDesc = startNode.getCurrentDescTuple().get(0);
+
+ // returns the set of edges that share the same prefix of startNode
+ Set<FlowEdge> edgeSet = new HashSet<FlowEdge>();
+
+ for (Iterator<Set<FlowEdge>> iter = mapFlowNodeToOutEdgeSet.values().iterator(); iter.hasNext();) {
+ Set<FlowEdge> nodeEdgeSet = iter.next();
+ for (Iterator<FlowEdge> iter2 = nodeEdgeSet.iterator(); iter2.hasNext();) {
+ FlowEdge edge = iter2.next();
+ if (edge.getInitTuple().get(0).equals(prefixDesc)) {
+ edgeSet.add(edge);
+ }
+ }
+ }
+
+ return edgeSet;
+ }
+
+ public Set<FlowEdge> getOutEdgeSet(FlowNode node) {
+ if (!mapFlowNodeToOutEdgeSet.containsKey(node)) {
+ mapFlowNodeToOutEdgeSet.put(node, new HashSet<FlowEdge>());
+ }
+ return mapFlowNodeToOutEdgeSet.get(node);
+ }
+
+ public Set<FlowEdge> getInEdgeSet(FlowNode node) {
+ if (!mapFlowNodeToInEdgeSet.containsKey(node)) {
+ mapFlowNodeToInEdgeSet.put(node, new HashSet<FlowEdge>());
+ }
+ return mapFlowNodeToInEdgeSet.get(node);
+ }
+
+ public void addValueFlowEdge(NTuple<Descriptor> fromDescTuple, NTuple<Descriptor> toDescTuple) {
+
+ FlowNode fromNode = getFlowNode(fromDescTuple);
+ FlowNode toNode = getFlowNode(toDescTuple);
+
+ if (toNode.getDescTuple().get(0).equals(LocationInference.LITERALDESC)) {
+ return;
+ }
+
+ // System.out.println("create an edge from " + fromNode + " to " + toNode);
int fromTupleSize = fromDescTuple.size();
- NTuple<Descriptor> curTuple = new NTuple<Descriptor>();
+ NTuple<Descriptor> curFromTuple = new NTuple<Descriptor>();
for (int i = 0; i < fromTupleSize; i++) {
Descriptor desc = fromDescTuple.get(i);
- curTuple.add(desc);
- addNeighbor(getInferNode(curTuple), toNode);
+ curFromTuple.add(desc);
+ int toTupleSize = toDescTuple.size();
+ NTuple<Descriptor> curToTuple = new NTuple<Descriptor>();
+ for (int k = 0; k < toTupleSize; k++) {
+ Descriptor toDesc = toDescTuple.get(k);
+ curToTuple.add(toDesc);
+ addFlowEdge(getFlowNode(curFromTuple), getFlowNode(curToTuple), fromDescTuple, toDescTuple);
+ }
}
- int toTupleSize = toDescTuple.size();
- curTuple = new NTuple<Descriptor>();
- for (int i = 0; i < toTupleSize; i++) {
- Descriptor desc = toDescTuple.get(i);
- curTuple.add(desc);
- addNeighbor(fromNode, getInferNode(curTuple));
+ // int fromTupleSize = fromDescTuple.size();
+ // NTuple<Descriptor> curTuple = new NTuple<Descriptor>();
+ // for (int i = 0; i < fromTupleSize; i++) {
+ // Descriptor desc = fromDescTuple.get(i);
+ // curTuple.add(desc);
+ // addFlowEdge(getFlowNode(curTuple), toNode, fromDescTuple, toDescTuple);
+ // }
+ //
+ // int toTupleSize = toDescTuple.size();
+ // curTuple = new NTuple<Descriptor>();
+ // for (int i = 0; i < toTupleSize; i++) {
+ // Descriptor desc = toDescTuple.get(i);
+ // curTuple.add(desc);
+ // addFlowEdge(fromNode, getFlowNode(curTuple), fromDescTuple, toDescTuple);
+ // }
+
+ }
+
+ private void addFlowEdge(FlowNode fromNode, FlowNode toNode, NTuple<Descriptor> initTuple,
+ NTuple<Descriptor> endTuple) {
+
+ FlowEdge edge = new FlowEdge(fromNode, toNode, initTuple, endTuple);
+ addOutEdge(fromNode, edge);
+ addInEdge(toNode, edge);
+
+ // System.out.println("add a new edge=" + edge);
+ }
+
+ private void addInEdge(FlowNode toNode, FlowEdge edge) {
+ getInEdgeSet(toNode).add(edge);
+ }
+
+ private void addOutEdge(FlowNode fromNode, FlowEdge edge) {
+ if (!mapFlowNodeToOutEdgeSet.containsKey(fromNode)) {
+ mapFlowNodeToOutEdgeSet.put(fromNode, new HashSet<FlowEdge>());
}
+ mapFlowNodeToOutEdgeSet.get(fromNode).add(edge);
+ }
+ public boolean contains(NTuple<Descriptor> descTuple) {
+ return mapDescTupleToInferNode.containsKey(descTuple);
}
- public FlowNode getInferNode(NTuple<Descriptor> descTuple) {
- if (mapDescTupleToInferNode.containsKey(descTuple)) {
- return mapDescTupleToInferNode.get(descTuple);
+ public FlowNode getFlowNode(NTuple<Descriptor> descTuple) {
+ if (!mapDescTupleToInferNode.containsKey(descTuple)) {
+ FlowNode node = createNewFlowNode(descTuple);
+ mapDescTupleToInferNode.put(descTuple, node);
}
- return null;
+ return mapDescTupleToInferNode.get(descTuple);
}
public FlowNode getThisVarNode() {
return thisVarNode;
}
- public void createNewFlowNode(NTuple<Descriptor> base) {
+ public FlowNode createNewFlowNode(NTuple<Descriptor> tuple) {
+
+ if (!mapDescTupleToInferNode.containsKey(tuple)) {
+ FlowNode node = new FlowNode(tuple);
+ mapDescTupleToInferNode.put(tuple, node);
+ // nodeSet.add(node);
+
+ mapLocTupleToFlowNode.put(getLocationTuple(node), node);
+
+ if (tuple.size() > 1) {
+ NTuple<Descriptor> baseTuple = tuple.subList(0, tuple.size() - 1);
+ getFlowNode(baseTuple).addFieldNode(node);
+ }
+
+ // System.out.println("Creating new node=" + node);
+ return node;
+ } else {
+ return mapDescTupleToInferNode.get(tuple);
+ }
+
+ }
+
+ public void addReturnFlowNode(NTuple<Descriptor> tuple) {
+
+ if (!mapDescTupleToInferNode.containsKey(tuple)) {
+ createNewFlowNode(tuple);
+ }
+
+ FlowNode node = mapDescTupleToInferNode.get(tuple);
+ returnNodeSet.add(node);
+ }
+
+ public Set<FlowNode> getReturnNodeSet() {
+ return returnNodeSet;
+ }
+
+ public Set<FlowNode> getLocalReachFlowNodeSetFrom(FlowNode fn) {
+ Set<FlowNode> set = new HashSet<FlowNode>();
+ recurLocalReachFlowNodeSet(fn, set);
+ return set;
+ }
+
+ private void recurLocalReachFlowNodeSet(FlowNode fn, Set<FlowNode> visited) {
+
+ Set<FlowEdge> outEdgeSet = getOutEdgeSet(fn);
+ for (Iterator iterator = outEdgeSet.iterator(); iterator.hasNext();) {
+ FlowEdge edge = (FlowEdge) iterator.next();
+ FlowNode dstNode = edge.getDst();
+
+ if (!visited.contains(dstNode)) {
+ visited.add(dstNode);
+ recurLocalReachFlowNodeSet(dstNode, visited);
+ }
+ }
+
+ }
+
+ private void getReachFlowNodeSetFrom(FlowNode fn, Set<FlowNode> visited) {
+
+ Set<FlowEdge> outEdgeSet = getOutEdgeSet(fn);
+ for (Iterator iterator = outEdgeSet.iterator(); iterator.hasNext();) {
+ FlowEdge edge = (FlowEdge) iterator.next();
+
+ if (fn.equals(getFlowNode(edge.getInitTuple()))) {
+ FlowNode dstNode = getFlowNode(edge.getEndTuple());
+ if (!visited.contains(dstNode)) {
+ visited.add(dstNode);
+ getReachFlowNodeSetFrom(dstNode, visited);
+ }
+ }
+ }
+
+ }
+
+ public Set<FlowNode> getReachFlowNodeSetFrom(FlowNode fn) {
+ Set<FlowNode> set = new HashSet<FlowNode>();
+ getReachFlowNodeSetFrom(fn, set);
+ return set;
+ }
+
+ public Set<FlowNode> getReachableSetFrom(NTuple<Descriptor> prefix) {
+ Set<FlowNode> reachableSet = new HashSet<FlowNode>();
+
+ Set<FlowNode> nodeSet = getNodeSet();
+ for (Iterator iterator = nodeSet.iterator(); iterator.hasNext();) {
+ FlowNode flowNode = (FlowNode) iterator.next();
+ if (flowNode.getCurrentDescTuple().startsWith(prefix)) {
+ recurReachableSetFrom(flowNode, reachableSet);
+ }
+ }
+
+ return reachableSet;
+ }
- FlowNode node = new FlowNode(base);
- mapDescTupleToInferNode.put(base, node);
+ // private void getReachFlowNodeSetFrom(FlowNode fn, Set<FlowNode> visited) {
+ //
+ // for (Iterator iterator = fn.getOutEdgeSet().iterator();
+ // iterator.hasNext();) {
+ // FlowEdge edge = (FlowEdge) iterator.next();
+ //
+ // if (fn.equals(getFlowNode(edge.getInitTuple()))) {
+ //
+ // FlowNode dstNode = getFlowNode(edge.getEndTuple());
+ //
+ // if (!visited.contains(dstNode)) {
+ // visited.add(dstNode);
+ // getReachFlowNodeSetFrom(dstNode, visited);
+ // }
+ // }
+ // }
+ //
+ // }
- System.out.println("Creating new node=" + node);
+ private void recurReachableSetFrom(FlowNode curNode, Set<FlowNode> reachableSet) {
+
+ Set<FlowEdge> edgeSet = getOutEdgeSet(curNode);
+ for (Iterator iterator = edgeSet.iterator(); iterator.hasNext();) {
+ FlowEdge edge = (FlowEdge) iterator.next();
+ FlowNode dstNode = getFlowNode(edge.getEndTuple());
+ if (!reachableSet.contains(dstNode)) {
+ reachableSet.add(dstNode);
+ recurReachableSetFrom(dstNode, reachableSet);
+ }
+ }
+
+ }
+
+ public Set<NTuple<Location>> getReachableFlowTupleSet(Set<NTuple<Location>> visited, FlowNode fn) {
+
+ Set<FlowEdge> outEdgeSet = getOutEdgeSet(fn);
+
+ for (Iterator iterator = outEdgeSet.iterator(); iterator.hasNext();) {
+ FlowEdge edge = (FlowEdge) iterator.next();
+
+ if (fn.getDescTuple().equals(edge.getInitTuple())) {
+ FlowNode dstNode = getFlowNode(edge.getEndTuple());
+ NTuple<Location> dstTuple = getLocationTuple(dstNode);
+
+ if (!visited.contains(dstTuple)) {
+ visited.add(dstTuple);
+ visited.addAll(getReachableFlowTupleSet(visited, dstNode));
+ }
+
+ }
+ }
+ return visited;
+ }
+
+ public NTuple<Location> getLocationTuple(NTuple<Descriptor> descTuple) {
+ return getLocationTuple(getFlowNode(descTuple));
+ }
+
+ public NTuple<Location> getLocationTuple(FlowNode fn) {
+
+ if (!mapFlowNodeToLocTuple.containsKey(fn)) {
+ NTuple<Descriptor> descTuple = fn.getDescTuple();
+ NTuple<Location> locTuple = new NTuple<Location>();
+ ClassDescriptor cd = null;
+
+ Descriptor localDesc = fn.getDescTuple().get(0);
+
+ System.out.println("descTuple=" + descTuple);
+
+ if (fn.isIntermediate()) {
+ Location interLoc = new Location(md, localDesc.getSymbol());
+ interLoc.setLocDescriptor(localDesc);
+ locTuple.add(interLoc);
+ } else if (localDesc.getSymbol().equals(SSJavaAnalysis.TOP)) {
+ Location topLoc = new Location(md, Location.TOP);
+ topLoc.setLocDescriptor(LocationInference.TOPDESC);
+ locTuple.add(topLoc);
+ } else if (localDesc.getSymbol().equals(LocationInference.GLOBALLOC)) {
+ Location globalLoc = new Location(md, LocationInference.GLOBALLOC);
+ globalLoc.setLocDescriptor(LocationInference.GLOBALDESC);
+ locTuple.add(globalLoc);
+ } else {
+ // normal case
+ for (int i = 0; i < descTuple.size(); i++) {
+ Descriptor curDesc = descTuple.get(i);
+ Location loc;
+ if (i == 0) {
+ loc = new Location(md, curDesc.getSymbol());
+ loc.setLocDescriptor(curDesc);
+ if (curDesc instanceof VarDescriptor) {
+ cd = ((VarDescriptor) curDesc).getType().getClassDesc();
+ } else {
+ // otherwise it should be the last element
+ cd = null;
+ }
+ } else {
+ loc = new Location(cd, curDesc.getSymbol());
+ loc.setLocDescriptor(curDesc);
+
+ if (curDesc instanceof FieldDescriptor) {
+ cd = ((FieldDescriptor) curDesc).getType().getClassDesc();
+ } else if (curDesc instanceof LocationDescriptor) {
+ cd = ((LocationDescriptor) curDesc).getEnclosingClassDesc();
+ } else {
+ // otherwise it should be the last element of the tuple
+ cd = null;
+ }
+
+ }
+ locTuple.add(loc);
+ }
+ }
+
+ mapFlowNodeToLocTuple.put(fn, locTuple);
+ }
+ return mapFlowNodeToLocTuple.get(fn);
+ }
+
+ public Set<FlowNode> getIncomingFlowNodeSet(FlowNode node) {
+ Set<FlowNode> set = new HashSet<FlowNode>();
+ getIncomingFlowNodeSet(node, set);
+ return set;
+ }
+
+ public void getIncomingFlowNodeSet(FlowNode node, Set<FlowNode> visited) {
+
+ for (Iterator iterator = getNodeSet().iterator(); iterator.hasNext();) {
+ FlowNode curNode = (FlowNode) iterator.next();
+ Set<FlowEdge> edgeSet = getOutEdgeSet(curNode);
+
+ for (Iterator iterator2 = edgeSet.iterator(); iterator2.hasNext();) {
+ FlowEdge flowEdge = (FlowEdge) iterator2.next();
+
+ if (node.equals(getFlowNode(flowEdge.getEndTuple()))) {
+ FlowNode incomingNode = getFlowNode(flowEdge.getInitTuple());
+
+ if (!visited.contains(incomingNode)) {
+ visited.add(incomingNode);
+ getIncomingFlowNodeSet(incomingNode, visited);
+ }
+ }
+ }
+ }
+
+ }
+
+ public Set<NTuple<Location>> getIncomingFlowTupleSet(FlowNode fn) {
+
+ NTuple<Descriptor> dstTuple = fn.getDescTuple();
+
+ Set<NTuple<Location>> set = new HashSet<NTuple<Location>>();
+
+ ClassDescriptor cd = null;
+
+ for (Iterator iterator = getNodeSet().iterator(); iterator.hasNext();) {
+ FlowNode node = (FlowNode) iterator.next();
+
+ Set<FlowEdge> edgeSet = getOutEdgeSet(node);
+ for (Iterator iterator2 = edgeSet.iterator(); iterator2.hasNext();) {
+ FlowEdge flowEdge = (FlowEdge) iterator2.next();
+ if (dstTuple.equals(flowEdge.getEndTuple())) {
+ NTuple<Descriptor> initTuple = flowEdge.getInitTuple();
+ NTuple<Location> locTuple = new NTuple<Location>();
+ for (int i = 0; i < initTuple.size(); i++) {
+ Descriptor d = initTuple.get(i);
+ Location loc;
+ if (i == 0) {
+ loc = new Location(md, d.getSymbol());
+ cd = ((VarDescriptor) d).getType().getClassDesc();
+ } else {
+ loc = new Location(cd, d.getSymbol());
+ cd = ((FieldDescriptor) d).getType().getClassDesc();
+ }
+ locTuple.add(loc);
+ }
+ set.add(locTuple);
+ }
+ }
+ }
+ return set;
+ }
+
+ public boolean isParameter(NTuple<Descriptor> tuple) {
+ // return true if a descriptor tuple is started with a parameter descriptor
+ Descriptor firstIdxDesc = tuple.get(0);
+ return mapParamDescToIdx.containsKey(firstIdxDesc);
+ }
+
+ public int getParamIdx(NTuple<Descriptor> tuple) {
+ Descriptor firstIdxDesc = tuple.get(0);
+ return mapParamDescToIdx.get(firstIdxDesc);
+ }
+
+ public FlowGraph clone() {
+ FlowGraph clone = new FlowGraph(md, mapParamDescToIdx);
+
+ // clone.setNodeSet(getNodeSet());
+ clone.setMapLocTupleToFlowNode(getMapLocTupleToFlowNode());
+ clone.setMapFlowNodeToLocTuple(getMapFlowNodeToLocTuple());
+ clone.setMapDescTupleToInferNode(getMapDescTupleToInferNode());
+
+ clone.setMapFlowNodeToOutEdgeSet(getMapFlowNodeToOutEdgeSet());
+ clone.setReturnNodeSet(getReturnNodeSet());
+ clone.setThisVarNode(getThisVarNode());
+
+ return clone;
+ }
+
+ public Map<FlowNode, NTuple<Location>> getMapFlowNodeToLocTuple() {
+ return mapFlowNodeToLocTuple;
+ }
+
+ public void setMapFlowNodeToLocTuple(Map<FlowNode, NTuple<Location>> in) {
+ this.mapFlowNodeToLocTuple.putAll(in);
+ }
+
+ public Map<FlowNode, Set<FlowEdge>> getMapFlowNodeToOutEdgeSet() {
+ return mapFlowNodeToOutEdgeSet;
+ }
+
+ public Set<FlowNode> getIncomingNodeSetByPrefix(Descriptor prefix) {
+
+ Set<FlowNode> incomingNodeSet = new HashSet<FlowNode>();
+
+ for (Iterator iterator = getNodeSet().iterator(); iterator.hasNext();) {
+ FlowNode curNode = (FlowNode) iterator.next();
+ Set<FlowEdge> outEdgeSet = getOutEdgeSet(curNode);
+
+ for (Iterator iterator2 = outEdgeSet.iterator(); iterator2.hasNext();) {
+ FlowEdge outEdge = (FlowEdge) iterator2.next();
+
+ if (outEdge.getEndTuple().startsWith(prefix)) {
+ incomingNodeSet.add(curNode);
+ recurIncomingNodeSetByPrefix(prefix, curNode, incomingNodeSet);
+
+ }
+
+ }
+ }
+
+ return incomingNodeSet;
+
+ }
+
+ private void recurIncomingNodeSetByPrefix(Descriptor prefix, FlowNode node, Set<FlowNode> visited) {
+
+ Set<FlowEdge> inEdgeSet = getInEdgeSet(node);
+
+ for (Iterator iterator = inEdgeSet.iterator(); iterator.hasNext();) {
+ FlowEdge inEdge = (FlowEdge) iterator.next();
+
+ FlowNode inNode = getFlowNode(inEdge.getInitTuple());
+ if (!inEdge.getInitTuple().startsWith(prefix) && !visited.contains(inNode)) {
+ visited.add(inNode);
+ recurIncomingNodeSetByPrefix(prefix, inNode, visited);
+ }
+ }
+
+ }
+
+ public void setMapFlowNodeToOutEdgeSet(Map<FlowNode, Set<FlowEdge>> inMap) {
+ Set<FlowNode> keySet = inMap.keySet();
+ for (Iterator iterator = keySet.iterator(); iterator.hasNext();) {
+ FlowNode key = (FlowNode) iterator.next();
+ Set<FlowEdge> newEdgeSet = new HashSet<FlowEdge>();
+ newEdgeSet.addAll(inMap.get(key));
+ mapFlowNodeToOutEdgeSet.put(key, newEdgeSet);
+ }
+ }
+
+ private void drawEdges(FlowNode node, BufferedWriter bw, Set<FlowNode> addedNodeSet,
+ Set<FlowEdge> addedEdgeSet) throws IOException {
+
+ Set<FlowEdge> edgeSet = getOutEdgeSet(node);
+
+ for (Iterator<FlowEdge> iterator = edgeSet.iterator(); iterator.hasNext();) {
+ FlowEdge flowEdge = iterator.next();
+
+ FlowNode u = flowEdge.getSrc();
+ FlowNode v = flowEdge.getDst();
+
+ if (u.getDescTuple().equals(flowEdge.getInitTuple())
+ && v.getDescTuple().equals(flowEdge.getEndTuple())) {
+ // only draw an edge of the actual value flow
+
+ if (!addedEdgeSet.contains(flowEdge)) {
+
+ if (!addedNodeSet.contains(u)) {
+ drawNode(u, bw);
+ addedNodeSet.add(u);
+ }
+ if (!addedNodeSet.contains(v)) {
+ drawNode(v, bw);
+ addedNodeSet.add(v);
+ }
+
+ bw.write("" + u.getID() + " -> " + v.getID() + ";\n");
+ addedEdgeSet.add(flowEdge);
+ }
+ }
+
+ }
+
+ }
+
+ private void drawNode(FlowNode node, BufferedWriter bw) throws IOException {
+ bw.write(node.getID() + " [label=\"" + node.getPrettyID() + "\"]" + ";\n");
+ }
+
+ public void writeGraph() throws java.io.IOException {
+ writeGraph("");
+ }
+
+ public void writeGraph(String suffix) throws java.io.IOException {
+
+ String graphName = "flowgraph_" + md.toString() + suffix;
+ graphName = graphName.replaceAll("[\\W]", "");
+
+ BufferedWriter bw = new BufferedWriter(new FileWriter(graphName + ".dot"));
+ bw.write("digraph " + graphName + " {\n");
+ bw.write("compound=true;\n");
+
+ // then visit every flow node
+
+ // Iterator<FlowNode> iter = nodeSet.iterator();
+ Iterator<FlowNode> iter = getNodeSet().iterator();
+
+ Set<FlowEdge> addedEdgeSet = new HashSet<FlowEdge>();
+ Set<FlowNode> addedNodeSet = new HashSet<FlowNode>();
+
+ while (iter.hasNext()) {
+ FlowNode node = iter.next();
+
+ if (node.getDescTuple().size() == 1) {
+ // here, we just care about the local variable
+ if (node.getFieldNodeSet().size() > 0) {
+ drawSubgraph(node, bw, addedEdgeSet);
+ }
+ }
+ drawEdges(node, bw, addedNodeSet, addedEdgeSet);
+
+ }
+
+ bw.write("}\n");
+ bw.close();
+
+ }
+
+ public boolean constainsNode(FlowNode node) {
+ return getNodeSet().contains(node);
+ }
+
+ private void drawSubgraph(FlowNode node, BufferedWriter bw, Set<FlowEdge> addedSet)
+ throws IOException {
+
+ bw.write("subgraph cluster_" + node.getID() + "{\n");
+ bw.write("label=\"" + node.getPrettyID() + "\";\n");
+
+ Set<FlowNode> fieldNodeSet = node.getFieldNodeSet();
+ for (Iterator iterator = fieldNodeSet.iterator(); iterator.hasNext();) {
+ FlowNode fieldNode = (FlowNode) iterator.next();
+ if (fieldNode.getFieldNodeSet().size() > 0) {
+ drawSubgraph(fieldNode, bw, addedSet);
+ } else {
+ Descriptor desc = fieldNode.getDescTuple().getLastElement();
+ if (desc instanceof VarDescriptor) {
+ VarDescriptor varDesc = (VarDescriptor) desc;
+ if (varDesc.getType().isPrimitive()) {
+ bw.write(fieldNode.getID() + " [label=\"" + fieldNode.getPrettyID() + "\"];\n");
+ }
+ } else if (desc instanceof FieldDescriptor) {
+ FieldDescriptor fieldDesc = (FieldDescriptor) desc;
+ if (fieldDesc.getType().isPrimitive()) {
+ bw.write(fieldNode.getID() + " [label=\"" + fieldNode.getPrettyID() + "\"];\n");
+ }
+ }
+ }
+ }
+ bw.write("}\n");
}
-}
+}
\ No newline at end of file
projects / IRC.git / blobdiff