// maps a method descriptor to a sub global flow graph that captures all value flows caused by the
// set of callees reachable from the method
- private Map<MethodDescriptor, FlowGraph> mapMethodDescriptorToSubGlobalFlowGraph;
+ private Map<MethodDescriptor, GlobalFlowGraph> mapMethodDescriptorToSubGlobalFlowGraph;
public static final String GLOBALLOC = "GLOBALLOC";
this.mapDescToLocationSummary = new HashMap<Descriptor, LocationSummary>();
- mapMethodDescriptorToSubGlobalFlowGraph = new HashMap<MethodDescriptor, FlowGraph>();
+ mapMethodDescriptorToSubGlobalFlowGraph = new HashMap<MethodDescriptor, GlobalFlowGraph>();
}
// 1) construct value flow graph
constructFlowGraph();
- constructGlobalFlowGraph();
+ assignCompositeLocation();
+
+ // constructGlobalFlowGraph();
System.exit(0);
// 2) construct lattices
inferLattices();
- simplifyLattices();
+ // simplifyLattices();
// 3) check properties
checkLattices();
}
+ private void assignCompositeLocation() {
+ calculateGlobalValueFlowCompositeLocation();
+ translateCompositeLocationAssignmentToFlowGraph();
+ }
+
+ private void translateCompositeLocationAssignmentToFlowGraph() {
+
+ }
+
private void constructGlobalFlowGraph() {
System.out.println("");
FlowGraph flowGraph = getFlowGraph(md);
FlowGraph subGlobalFlowGraph = flowGraph.clone();
- mapMethodDescriptorToSubGlobalFlowGraph.put(md, subGlobalFlowGraph);
+
+ // mapMethodDescriptorToSubGlobalFlowGraph.put(md, subGlobalFlowGraph);
- addValueFlowsFromCalleeSubGlobalFlowGraph(md, subGlobalFlowGraph);
+ // addValueFlowsFromCalleeSubGlobalFlowGraph(md, subGlobalFlowGraph);
- try {
- subGlobalFlowGraph.writeGraph("_SUBGLOBAL");
- } catch (IOException e) {
- e.printStackTrace();
- }
+ // try {
+ // subGlobalFlowGraph.writeGraph("_SUBGLOBAL");
+ // } catch (IOException e) {
+ // e.printStackTrace();
+ // }
// FlowGraph fg = new FlowGraph(md, mapParamDescToIdx);
// mapMethodDescriptorToFlowGraph.put(md, fg);
// analyzeMethodBody(md.getClassDesc(), md);
// DEBUG: write a global flow graph
MethodDescriptor mdContainingSSJavaLoop = ssjava.getMethodContainingSSJavaLoop();
- FlowGraph globalFlowGraph = getSubGlobalFlowGraph(mdContainingSSJavaLoop);
+ // FlowGraph globalFlowGraph = getSubGlobalFlowGraph(mdContainingSSJavaLoop);
// System.out.println("GLOBAL NODE SET=" + globalFlowGraph.getNodeSet());
- assignCompositeLocation(globalFlowGraph);
- try {
- globalFlowGraph.writeGraph("_GLOBAL");
- } catch (IOException e) {
- e.printStackTrace();
- }
+ // assignCompositeLocation(globalFlowGraph);
+ // try {
+ // globalFlowGraph.writeGraph("_GLOBAL");
+ // } catch (IOException e) {
+ // e.printStackTrace();
+ // }
// _debug_printGraph();
}
- private void assignCompositeLocation(FlowGraph globalFlowGraph) {
- Set<FlowNode> nodeSet = globalFlowGraph.getNodeSet();
-
- for (Iterator iterator = nodeSet.iterator(); iterator.hasNext();) {
- FlowNode flowNode = (FlowNode) iterator.next();
- Set<FlowNode> inNodeSet = globalFlowGraph.getIncomingFlowNodeSet(flowNode);
- Set<FlowNode> reachableNodeSet = globalFlowGraph.getReachFlowNodeSetFrom(flowNode);
-
- // System.out.println("flowNode=" + flowNode + " incoming=" + inNodeSet);
- // System.out.println("reachableNodeSet=" + reachableNodeSet);
+ private void calculateGlobalValueFlowCompositeLocation() {
- Map<NTuple<Location>, Set<NTuple<Descriptor>>> mapPrefixToIncomingLocTupleSet =
- new HashMap<NTuple<Location>, Set<NTuple<Descriptor>>>();
+ System.out.println("SSJAVA: Calculate composite locations in the global value flow graph");
+ MethodDescriptor methodDescEventLoop = ssjava.getMethodContainingSSJavaLoop();
+ GlobalFlowGraph graph = getSubGlobalFlowGraph(methodDescEventLoop);
- List<NTuple<Descriptor>> prefixList = new ArrayList<NTuple<Descriptor>>();
+ Set<NTuple<Location>> prefixSet = new HashSet<NTuple<Location>>();
- for (Iterator iterator2 = inNodeSet.iterator(); iterator2.hasNext();) {
- FlowNode inNode = (FlowNode) iterator2.next();
+ Set<GlobalFlowNode> nodeSet = graph.getNodeSet();
- NTuple<Descriptor> inNodeTuple = inNode.getCurrentDescTuple();
+ next: for (Iterator iterator = nodeSet.iterator(); iterator.hasNext();) {
+ GlobalFlowNode node = (GlobalFlowNode) iterator.next();
+ Set<GlobalFlowNode> incomingNodeSet = graph.getIncomingNodeSet(node);
- // CompositeLocation inNodeInferredLoc =
- // generateInferredCompositeLocation(methodInfo, inNodeTuple);
- // NTuple<Location> inNodeInferredLocTuple = inNodeInferredLoc.getTuple();
+ List<NTuple<Location>> prefixList = calculatePrefixList(graph, node);
- for (int i = 1; i < inNodeTuple.size(); i++) {
- NTuple<Descriptor> prefix = inNodeTuple.subList(0, i);
- if (!prefixList.contains(prefix)) {
- prefixList.add(prefix);
- }
- }
- }
+ Set<GlobalFlowNode> reachNodeSet = graph.getReachableNodeSetFrom(node);
- Collections.sort(prefixList, new Comparator<NTuple<Descriptor>>() {
- public int compare(NTuple<Descriptor> arg0, NTuple<Descriptor> arg1) {
- int s0 = arg0.size();
- int s1 = arg1.size();
- if (s0 > s1) {
- return -1;
- } else if (s0 == s1) {
- return 0;
- } else {
- return 1;
- }
- }
- });
+ // System.out.println("node=" + node + " inNodeSet=" + incomingNodeSet
+ // + " reachableNodeSet=" + reachNodeSet);
- // find out reachable nodes that have the longest common prefix
for (int i = 0; i < prefixList.size(); i++) {
- NTuple<Descriptor> curPrefix = prefixList.get(i);
- Set<NTuple<Descriptor>> reachableCommonPrefixSet = new HashSet<NTuple<Descriptor>>();
-
- for (Iterator iterator2 = reachableNodeSet.iterator(); iterator2.hasNext();) {
- FlowNode reachableNode = (FlowNode) iterator2.next();
- NTuple<Descriptor> reachLocTuple = reachableNode.getCurrentDescTuple();
- if (reachLocTuple.startsWith(curPrefix)) {
- reachableCommonPrefixSet.add(reachLocTuple);
+ NTuple<Location> curPrefix = prefixList.get(i);
+ Set<NTuple<Location>> reachableCommonPrefixSet = new HashSet<NTuple<Location>>();
+
+ for (Iterator iterator2 = reachNodeSet.iterator(); iterator2.hasNext();) {
+ GlobalFlowNode reachNode = (GlobalFlowNode) iterator2.next();
+ if (reachNode.getLocTuple().startsWith(curPrefix)) {
+ reachableCommonPrefixSet.add(reachNode.getLocTuple());
}
}
if (!reachableCommonPrefixSet.isEmpty()) {
- // found reachable nodes that start with the prefix curPrefix
- // need to assign a composite location
- // System.out.println("-prefixList=" + prefixList);
- // System.out.println("-reachableCommonPrefixSet=" + reachableCommonPrefixSet);
- // System.out.println("-curPrefix=" + curPrefix);
-
- // first, check if there are more than one the set of locations that has
- // the same length of the longest reachable prefix, no way to assign
- // a composite location to the input local var
- prefixSanityCheck(prefixList, i, globalFlowGraph, reachableNodeSet);
-
- MethodDescriptor topMethodDesc = globalFlowGraph.getMethodDescriptor();
- CompositeLocation newCompLoc = generateCompositeLocation(curPrefix, topMethodDesc);
-
- System.out.println("SET COMPOSITE LOCATION=" + newCompLoc + " to " + flowNode);
- flowNode.setCompositeLocation(newCompLoc);
+ CompositeLocation newCompLoc = generateCompositeLocation(curPrefix);
+ System.out.println("NEED TO ASSIGN COMP LOC TO " + node + " with prefix=" + curPrefix);
+ System.out.println("- newCompLoc=" + newCompLoc);
+ // flowNode.setCompositeLocation(newCompLoc);
+ continue next;
}
+
}
}
-
+ // Set<GlobalFlowNode> inNodeSet = graph.getIncomingNodeSetWithPrefix(prefix);
+ // System.out.println("inNodeSet=" + inNodeSet + " from=" + node);
}
- private CompositeLocation generateCompositeLocation(NTuple<Descriptor> curPrefix,
- MethodDescriptor md) {
- CompositeLocation newCompLoc = new CompositeLocation();
+ private List<NTuple<Location>> calculatePrefixList(GlobalFlowGraph graph, GlobalFlowNode node) {
- Descriptor enclosingDesc = md;
- for (int i = 0; i < curPrefix.size(); i++) {
- Descriptor curDesc = curPrefix.get(i);
- Location loc = new Location(enclosingDesc, curDesc.getSymbol());
- newCompLoc.addLocation(loc);
- if (i == 0) {
- VarDescriptor varDesc = (VarDescriptor) curDesc;
- enclosingDesc = varDesc.getType().getClassDesc();
- } else {
- FieldDescriptor fieldDesc = (FieldDescriptor) curDesc;
- enclosingDesc = fieldDesc.getType().getClassDesc();
+ System.out.println("\n##### calculatePrefixList=" + node);
+
+ Set<GlobalFlowNode> incomingNodeSet = graph.getIncomingNodeSet(node);
+
+ List<NTuple<Location>> prefixList = new ArrayList<NTuple<Location>>();
+
+ for (Iterator iterator = incomingNodeSet.iterator(); iterator.hasNext();) {
+ GlobalFlowNode inNode = (GlobalFlowNode) iterator.next();
+ NTuple<Location> inNodeTuple = inNode.getLocTuple();
+
+ for (int i = 1; i < inNodeTuple.size(); i++) {
+ NTuple<Location> prefix = inNodeTuple.subList(0, i);
+ if (!prefixList.contains(prefix)) {
+ prefixList.add(prefix);
+ }
}
}
- LocationDescriptor newLocDescriptor = generateNewLocationDescriptor();
- newLocDescriptor.setEnclosingClassDesc((ClassDescriptor) enclosingDesc);
+ Collections.sort(prefixList, new Comparator<NTuple<Location>>() {
+ public int compare(NTuple<Location> arg0, NTuple<Location> arg1) {
+ int s0 = arg0.size();
+ int s1 = arg1.size();
+ if (s0 > s1) {
+ return -1;
+ } else if (s0 == s1) {
+ return 0;
+ } else {
+ return 1;
+ }
+ }
+ });
+ return prefixList;
+ }
- Location newLoc = new Location(enclosingDesc, newLocDescriptor.getSymbol());
- newLoc.setLocDescriptor(newLocDescriptor);
- newCompLoc.addLocation(newLoc);
+ private GlobalFlowGraph constructSubGlobalFlowGraph(FlowGraph flowGraph) {
- return newCompLoc;
+ MethodDescriptor md = flowGraph.getMethodDescriptor();
+
+ GlobalFlowGraph globalGraph = new GlobalFlowGraph(md);
+
+ // Set<FlowNode> nodeSet = flowGraph.getNodeSet();
+ Set<FlowEdge> edgeSet = flowGraph.getEdgeSet();
+
+ for (Iterator iterator = edgeSet.iterator(); iterator.hasNext();) {
+
+ FlowEdge edge = (FlowEdge) iterator.next();
+ NTuple<Descriptor> srcDescTuple = edge.getInitTuple();
+ NTuple<Descriptor> dstDescTuple = edge.getEndTuple();
+
+ // here only keep the first element(method location) of the descriptor tuple
+ NTuple<Location> srcLocTuple = translateToLocTuple(md, srcDescTuple);
+ // Location srcMethodLoc = srcLocTuple.get(0);
+ // Descriptor srcVarDesc = srcMethodLoc.getLocDescriptor();
+ // // if (flowGraph.isParamDesc(srcVarDesc) && (!srcVarDesc.equals(md.getThis()))) {
+ // if (!srcVarDesc.equals(md.getThis())) {
+ // srcLocTuple = new NTuple<Location>();
+ // Location loc = new Location(md, srcVarDesc);
+ // srcLocTuple.add(loc);
+ // }
+ //
+ NTuple<Location> dstLocTuple = translateToLocTuple(md, dstDescTuple);
+ // Location dstMethodLoc = dstLocTuple.get(0);
+ // Descriptor dstVarDesc = dstMethodLoc.getLocDescriptor();
+ // if (!dstVarDesc.equals(md.getThis())) {
+ // dstLocTuple = new NTuple<Location>();
+ // Location loc = new Location(md, dstVarDesc);
+ // dstLocTuple.add(loc);
+ // }
+
+ globalGraph.addValueFlowEdge(srcLocTuple, dstLocTuple);
+
+ }
+
+ return globalGraph;
}
- private void prefixSanityCheck(List<NTuple<Descriptor>> prefixList, int curIdx,
- FlowGraph globalFlowGraph, Set<FlowNode> reachableNodeSet) {
+ private NTuple<Location> translateToLocTuple(MethodDescriptor md, NTuple<Descriptor> descTuple) {
+
+ NTuple<Location> locTuple = new NTuple<Location>();
- NTuple<Descriptor> curPrefix = prefixList.get(curIdx);
+ Descriptor enclosingDesc = md;
+ for (int i = 0; i < descTuple.size(); i++) {
+ Descriptor desc = descTuple.get(i);
- for (int i = curIdx + 1; i < prefixList.size(); i++) {
- NTuple<Descriptor> prefixTuple = prefixList.get(i);
+ Location loc = new Location(enclosingDesc, desc);
+ locTuple.add(loc);
- if (curPrefix.startsWith(prefixTuple)) {
- continue;
+ if (desc instanceof VarDescriptor) {
+ enclosingDesc = ((VarDescriptor) desc).getType().getClassDesc();
+ } else if (desc instanceof FieldDescriptor) {
+ enclosingDesc = ((FieldDescriptor) desc).getType().getClassDesc();
+ } else {
+ // TODO: inter descriptor case
+ enclosingDesc = desc;
}
- for (Iterator iterator2 = reachableNodeSet.iterator(); iterator2.hasNext();) {
- FlowNode reachableNode = (FlowNode) iterator2.next();
- NTuple<Descriptor> reachLocTuple = reachableNode.getCurrentDescTuple();
- if (reachLocTuple.startsWith(prefixTuple)) {
- throw new Error(
- "Failed to generate a composite location because there is more than one prefix which is reach to the current node.");
- }
- }
}
+ return locTuple;
+
}
private void addValueFlowsFromCalleeSubGlobalFlowGraph(MethodDescriptor mdCaller,
- FlowGraph subGlobalFlowGraph) {
+ GlobalFlowGraph subGlobalFlowGraph) {
// the transformation for a call site propagates flows through parameters
// if the method is virtual, it also grab all relations from any possible
for (Iterator iterator2 = setPossibleCallees.iterator(); iterator2.hasNext();) {
MethodDescriptor possibleMdCallee = (MethodDescriptor) iterator2.next();
propagateValueFlowsToCallerFromSubGlobalFlowGraph(min, mdCaller, possibleMdCallee);
- // propagateFlowsToCallerWithNoCompositeLocation(min, mdCaller, possibleMdCallee);
}
}
NTuple<Descriptor> baseTuple = mapMethodInvokeNodeToBaseTuple.get(min);
- FlowGraph callerSubGlobalGraph = getSubGlobalFlowGraph(mdCaller);
- FlowGraph calleeSubGlobalGraph = getSubGlobalFlowGraph(possibleMdCallee);
+ NTuple<Location> baseLocTuple = translateToLocTuple(mdCaller, baseTuple);
- int numParam = calleeSubGlobalGraph.getNumParameters();
- for (int idx = 0; idx < numParam; idx++) {
- FlowNode paramNode = calleeSubGlobalGraph.getParamFlowNode(idx);
- NTuple<Descriptor> argTuple = mapMethodInvokeNodeToArgIdxMap.get(min).get(idx);
- System.out.println("argTupleSet=" + argTuple + " param=" + paramNode);
- // here, it adds all value flows reachable from the paramNode in the callee's flow graph
- addValueFlowsFromCalleeParam(min, calleeSubGlobalGraph, paramNode, callerSubGlobalGraph,
- argTuple, baseTuple);
+ FlowGraph calleeFlowGraph = getFlowGraph(possibleMdCallee);
+
+ GlobalFlowGraph callerSubGlobalGraph = getSubGlobalFlowGraph(mdCaller);
+ GlobalFlowGraph calleeSubGlobalGraph = getSubGlobalFlowGraph(possibleMdCallee);
+
+ Set<GlobalFlowNode> calleeNodeSet = calleeSubGlobalGraph.getNodeSet();
+ for (Iterator iterator = calleeNodeSet.iterator(); iterator.hasNext();) {
+ GlobalFlowNode calleeNode = (GlobalFlowNode) iterator.next();
+ addValueFlowFromCalleeNode(min, mdCaller, possibleMdCallee, calleeNode);
+ }
+
+ // int numParam = calleeFlowGraph.getNumParameters();
+ // for (int idx = 0; idx < numParam; idx++) {
+ //
+ // FlowNode paramNode = calleeFlowGraph.getParamFlowNode(idx);
+ //
+ // NTuple<Location> paramLocTuple =
+ // translateToLocTuple(possibleMdCallee, paramNode.getCurrentDescTuple());
+ //
+ // GlobalFlowNode globalParamNode = calleeSubGlobalGraph.getFlowNode(paramLocTuple);
+ //
+ // NTuple<Descriptor> argTuple = mapMethodInvokeNodeToArgIdxMap.get(min).get(idx);
+ //
+ // NTuple<Location> argLocTuple = translateToLocTuple(mdCaller, argTuple);
+ //
+ // System.out.println("argTupleSet=" + argLocTuple + " param=" + paramLocTuple);
+ // // here, it adds all value flows reachable from the paramNode in the callee's flow graph
+ //
+ // addValueFlowsFromCalleeParam(mdCaller, argLocTuple, baseLocTuple, possibleMdCallee,
+ // globalParamNode);
+ // }
+ //
+ // // TODO
+ // // FlowGraph callerSubGlobalGraph = getSubGlobalFlowGraph(mdCaller);
+ // // FlowGraph calleeSubGlobalGraph = getSubGlobalFlowGraph(possibleMdCallee);
+ // //
+ // // int numParam = calleeSubGlobalGraph.getNumParameters();
+ // // for (int idx = 0; idx < numParam; idx++) {
+ // // FlowNode paramNode = calleeSubGlobalGraph.getParamFlowNode(idx);
+ // // NTuple<Descriptor> argTuple = mapMethodInvokeNodeToArgIdxMap.get(min).get(idx);
+ // // System.out.println("argTupleSet=" + argTuple + " param=" + paramNode);
+ // // // here, it adds all value flows reachable from the paramNode in the callee's flow graph
+ // // addValueFlowsFromCalleeParam(min, calleeSubGlobalGraph, paramNode, callerSubGlobalGraph,
+ // // argTuple, baseTuple);
+ // // }
+
+ }
+
+ private void addValueFlowFromCalleeNode(MethodInvokeNode min, MethodDescriptor mdCaller,
+ MethodDescriptor mdCallee, GlobalFlowNode calleeSrcNode) {
+
+ GlobalFlowGraph calleeSubGlobalGraph = getSubGlobalFlowGraph(mdCallee);
+ GlobalFlowGraph callerSubGlobalGraph = getSubGlobalFlowGraph(mdCaller);
+
+ NTuple<Location> srcNodeLocTuple =
+ translateToCallerLocTuple(min, mdCallee, mdCaller, calleeSrcNode.getLocTuple());
+
+ Set<GlobalFlowNode> outNodeSet = calleeSubGlobalGraph.getOutNodeSet(calleeSrcNode);
+
+ for (Iterator iterator = outNodeSet.iterator(); iterator.hasNext();) {
+ GlobalFlowNode outNode = (GlobalFlowNode) iterator.next();
+ NTuple<Location> dstNodeLocTuple =
+ translateToCallerLocTuple(min, mdCallee, mdCaller, outNode.getLocTuple());
+ callerSubGlobalGraph.addValueFlowEdge(srcNodeLocTuple, dstNodeLocTuple);
+ }
+
+ }
+
+ private NTuple<Location> translateToCallerLocTuple(MethodInvokeNode min,
+ MethodDescriptor mdCallee, MethodDescriptor mdCaller, NTuple<Location> nodeLocTuple) {
+
+ FlowGraph calleeFlowGraph = getFlowGraph(mdCallee);
+
+ NTuple<Descriptor> nodeDescTuple = translateToDescTuple(nodeLocTuple);
+
+ if (calleeFlowGraph.isParameter(nodeDescTuple)) {
+ int paramIdx = calleeFlowGraph.getParamIdx(nodeDescTuple);
+ NTuple<Descriptor> argDescTuple = mapMethodInvokeNodeToArgIdxMap.get(min).get(paramIdx);
+ NTuple<Location> argLocTuple = translateToLocTuple(mdCaller, argDescTuple);
+
+ NTuple<Location> callerLocTuple = new NTuple<Location>();
+
+ callerLocTuple.addAll(argLocTuple);
+ for (int i = 1; i < nodeLocTuple.size(); i++) {
+ callerLocTuple.add(nodeLocTuple.get(i));
+ }
+ return callerLocTuple;
+ } else {
+ return nodeLocTuple;
+ }
+
+ }
+
+ private NTuple<Descriptor> translateToDescTuple(NTuple<Location> locTuple) {
+
+ NTuple<Descriptor> descTuple = new NTuple<Descriptor>();
+ for (int i = 0; i < locTuple.size(); i++) {
+ descTuple.add(locTuple.get(i).getLocDescriptor());
}
+ return descTuple;
+
+ }
+
+ private void addValueFlowsFromCalleeParam(MethodDescriptor mdCaller,
+ NTuple<Location> argLocTuple, NTuple<Location> baseLocTuple, MethodDescriptor mdCallee,
+ GlobalFlowNode globalParamNode) {
+
+ Set<GlobalFlowNode> visited = new HashSet<GlobalFlowNode>();
+ visited.add(globalParamNode);
+ recurAddValueFlowsFromCalleeParam(mdCaller, argLocTuple, baseLocTuple, mdCallee,
+ globalParamNode);
+
+ }
+
+ private void recurAddValueFlowsFromCalleeParam(MethodDescriptor mdCaller,
+ NTuple<Location> argLocTuple, NTuple<Location> baseLocTuple, MethodDescriptor mdCallee,
+ GlobalFlowNode calleeCurNode) {
+
+ // FlowGraph calleeFlowGraph = getFlowGraph(mdCallee);
+ // GlobalFlowGraph calleeSubGlobalGraph = getSubGlobalFlowGraph(mdCallee);
+ //
+ // NTuple<Location> curNodeLocTuple = calleeCurNode.getLocTuple();
+ // NTuple<Descriptor> curNodeDescTuple = calleeCurNode.getDescTuple();
+ // if (calleeFlowGraph.isParameter(curNodeDescTuple)) {
+ // curNodeLocTuple = translateToCaller(argLocTuple, curNodeLocTuple);
+ // }
+ //
+ // Set<GlobalFlowNode> outNodeSet = calleeSubGlobalGraph.getOutNodeSet(calleeCurNode);
+ // for (Iterator iterator = outNodeSet.iterator(); iterator.hasNext();) {
+ // GlobalFlowNode outNode = (GlobalFlowNode) iterator.next();
+ //
+ // NTuple<Location> curNodeLocTuple = calleeCurNode.getLocTuple();
+ // NTuple<Descriptor> curNodeDescTuple = calleeCurNode.getDescTuple();
+ // if (calleeFlowGraph.isParameter(curNodeDescTuple)) {
+ // curNodeLocTuple = translateToCaller(argLocTuple, curNodeLocTuple);
+ // }
+ //
+ // outNode.getDescTuple();
+ //
+ // if (calleeFlowGraph.is)
+ //
+ // if (calleeSubGlobalGraph.isParameter(srcDescTuple)) {
+ // // destination node is started with 'parameter'
+ // // need to translate it in terms of the caller's a node
+ // srcDescTuple =
+ // translateToCaller(min, calleeSubGlobalGraph.getParamIdx(srcDescTuple), srcDescTuple);
+ // }
+ //
+ // }
+ //
+ // Set<FlowEdge> edgeSet = calleeSubGlobalGraph.getOutEdgeSetStartingFrom(calleeSrcNode);
+ // for (Iterator iterator = edgeSet.iterator(); iterator.hasNext();) {
+ // FlowEdge flowEdge = (FlowEdge) iterator.next();
+ //
+ // NTuple<Descriptor> srcDescTuple = flowEdge.getInitTuple();
+ // NTuple<Descriptor> dstDescTuple = flowEdge.getEndTuple();
+ //
+ // FlowNode dstNode = calleeSubGlobalGraph.getFlowNode(dstDescTuple);
+ //
+ // if (calleeSubGlobalGraph.isParameter(srcDescTuple)) {
+ // // destination node is started with 'parameter'
+ // // need to translate it in terms of the caller's a node
+ // srcDescTuple =
+ // translateToCaller(min, calleeSubGlobalGraph.getParamIdx(srcDescTuple), srcDescTuple);
+ // }
+ //
+ // if (calleeSubGlobalGraph.isParameter(dstDescTuple)) {
+ // // destination node is started with 'parameter'
+ // // need to translate it in terms of the caller's a node
+ // dstDescTuple =
+ // translateToCaller(min, calleeSubGlobalGraph.getParamIdx(dstDescTuple), dstDescTuple);
+ // }
+ //
+ // callerSubGlobalGraph.addValueFlowEdge(srcDescTuple, dstDescTuple);
+ //
+ // if (!visited.contains(dstNode)) {
+ // visited.add(dstNode);
+ // recurAddValueFlowsFromCalleeParam(min, calleeSubGlobalGraph, dstNode, callerSubGlobalGraph,
+ // dstDescTuple, visited, baseTuple);
+ // }
+ //
+ // }
}
- private void addValueFlowsFromCalleeParam(MethodInvokeNode min, FlowGraph calleeSubGlobalGraph,
- FlowNode paramNode, FlowGraph callerSubGlobalGraph, NTuple<Descriptor> argTuple,
- NTuple<Descriptor> baseTuple) {
+ private NTuple<Location> translateToCaller(NTuple<Location> argLocTuple,
+ NTuple<Location> curNodeLocTuple) {
+
+ NTuple<Location> callerLocTuple = new NTuple<Location>();
- Set<FlowNode> visited = new HashSet<FlowNode>();
+ callerLocTuple.addAll(argLocTuple);
+ for (int i = 1; i < curNodeLocTuple.size(); i++) {
+ callerLocTuple.add(curNodeLocTuple.get(i));
+ }
- visited.add(paramNode);
- recurAddValueFlowsFromCalleeParam(min, calleeSubGlobalGraph, paramNode, callerSubGlobalGraph,
- argTuple, visited, baseTuple);
+ return callerLocTuple;
}
private void recurAddValueFlowsFromCalleeParam(MethodInvokeNode min,
return callerTuple;
}
- private NTuple<Descriptor> translateToCaller(NTuple<Descriptor> dstDescTuple,
- NTuple<Descriptor> baseTuple) {
- NTuple<Descriptor> callerDescTuple = new NTuple<Descriptor>();
+ private NTuple<Descriptor> traslateToCalleeParamTupleToCallerArgTuple(
+ NTuple<Descriptor> calleeInitTuple, NTuple<Descriptor> callerSrcTuple) {
+
+ NTuple<Descriptor> callerInitTuple = new NTuple<Descriptor>();
+
+ for (int i = 0; i < callerSrcTuple.size(); i++) {
+ callerInitTuple.add(callerSrcTuple.get(i));
+ }
- callerDescTuple.addAll(baseTuple);
- for (int i = 1; i < dstDescTuple.size(); i++) {
- callerDescTuple.add(dstDescTuple.get(i));
+ for (int i = 1; i < calleeInitTuple.size(); i++) {
+ callerInitTuple.add(calleeInitTuple.get(i));
}
- return callerDescTuple;
+ return callerInitTuple;
}
public LocationSummary getLocationSummary(Descriptor d) {
for (int paramIdx = 0; paramIdx < flowGraph.getNumParameters(); paramIdx++) {
FlowNode flowNode = flowGraph.getParamFlowNode(paramIdx);
- NTuple<Location> locTuple = flowNode.getLocTuple();
+ NTuple<Descriptor> descTuple = flowNode.getDescTuple();
CompositeLocation assignedCompLoc = flowNode.getCompositeLocation();
CompositeLocation inferredCompLoc;
if (assignedCompLoc != null) {
inferredCompLoc = translateCompositeLocation(assignedCompLoc);
} else {
- Location loc = locTuple.get(0);
+ Descriptor locDesc = descTuple.get(0);
+ Location loc = new Location(md, locDesc.getSymbol());
+ loc.setLocDescriptor(locDesc);
inferredCompLoc = new CompositeLocation(loc);
}
System.out.println("-paramIdx=" + paramIdx + " infer=" + inferredCompLoc);
Set<FlowNode> nodeSet = fg.getNodeSet();
for (Iterator iterator = nodeSet.iterator(); iterator.hasNext();) {
FlowNode flowNode = (FlowNode) iterator.next();
- if (flowNode.getLocTuple().get(0).equals(md.getThis())) {
+ if (flowNode.getDescTuple().get(0).equals(md.getThis())) {
return true;
}
}
}
- private void simplifyLattices() {
-
- setupToAnalyze();
-
- while (!toAnalyzeIsEmpty()) {
- ClassDescriptor cd = toAnalyzeNext();
- setupToAnalazeMethod(cd);
-
- SSJavaLattice<String> classLattice = cd2lattice.get(cd);
- if (classLattice != null) {
- System.out.println("@@@check lattice=" + cd);
- checkLatticeProperty(cd, classLattice);
- }
-
- while (!toAnalyzeMethodIsEmpty()) {
- MethodDescriptor md = toAnalyzeMethodNext();
- SSJavaLattice<String> methodLattice = md2lattice.get(md);
- if (methodLattice != null) {
- System.out.println("@@@check lattice=" + md);
- checkLatticeProperty(md, methodLattice);
- }
- }
- }
-
- setupToAnalyze();
-
- while (!toAnalyzeIsEmpty()) {
- ClassDescriptor cd = toAnalyzeNext();
-
- setupToAnalazeMethod(cd);
-
- SSJavaLattice<String> classLattice = cd2lattice.get(cd);
- if (classLattice != null) {
- classLattice.removeRedundantEdges();
- }
-
- while (!toAnalyzeMethodIsEmpty()) {
- MethodDescriptor md = toAnalyzeMethodNext();
- SSJavaLattice<String> methodLattice = md2lattice.get(md);
- if (methodLattice != null) {
- methodLattice.removeRedundantEdges();
- }
- }
- }
-
- }
-
- private boolean checkLatticeProperty(Descriptor d, SSJavaLattice<String> lattice) {
- // if two elements has the same incoming node set,
- // we need to merge two elements ...
-
- boolean isUpdated;
- boolean isModified = false;
- do {
- isUpdated = removeNodeSharingSameIncomingNodes(d, lattice);
- if (!isModified && isUpdated) {
- isModified = true;
- }
- } while (isUpdated);
-
- return isModified;
- }
-
- private boolean removeNodeSharingSameIncomingNodes(Descriptor d, SSJavaLattice<String> lattice) {
- LocationInfo locInfo = getLocationInfo(d);
- Map<String, Set<String>> map = lattice.getIncomingElementMap();
- Set<String> keySet = map.keySet();
- for (Iterator iterator = keySet.iterator(); iterator.hasNext();) {
- String key = (String) iterator.next();
- Set<String> incomingSetKey = map.get(key);
-
- // System.out.println("key=" + key + " incomingSetKey=" +
- // incomingSetKey);
- if (incomingSetKey.size() > 0) {
- for (Iterator iterator2 = keySet.iterator(); iterator2.hasNext();) {
- String cur = (String) iterator2.next();
- if (!cur.equals(key)) {
- Set<String> incomingSetCur = map.get(cur);
- if (incomingSetCur.equals(incomingSetKey)) {
- if (!(incomingSetCur.size() == 1 && incomingSetCur.contains(lattice.getTopItem()))) {
- // NEED TO MERGE HERE!!!!
- System.out.println("@@@Try merge=" + cur + " " + key);
-
- Set<String> mergeSet = new HashSet<String>();
- mergeSet.add(cur);
- mergeSet.add(key);
-
- String newMergeLoc = "MLoc" + (SSJavaLattice.seed++);
-
- System.out.println("---ASSIGN NEW MERGE LOC=" + newMergeLoc + " to " + mergeSet);
- lattice.mergeIntoNewLocation(mergeSet, newMergeLoc);
-
- for (Iterator miterator = mergeSet.iterator(); miterator.hasNext();) {
- String oldLocSymbol = (String) miterator.next();
-
- Set<Pair<Descriptor, Descriptor>> inferLocSet =
- locInfo.getRelatedInferLocSet(oldLocSymbol);
- System.out.println("---update related locations=" + inferLocSet
- + " oldLocSymbol=" + oldLocSymbol);
-
- for (Iterator miterator2 = inferLocSet.iterator(); miterator2.hasNext();) {
- Pair<Descriptor, Descriptor> pair =
- (Pair<Descriptor, Descriptor>) miterator2.next();
- Descriptor enclosingDesc = pair.getFirst();
- Descriptor desc = pair.getSecond();
-
- System.out.println("---inferLoc pair=" + pair);
-
- CompositeLocation inferLoc =
- getLocationInfo(enclosingDesc).getInferLocation(desc);
- System.out.println("oldLoc=" + inferLoc);
- // if (curMethodInfo.md.equals(enclosingDesc)) {
- // inferLoc = curMethodInfo.getInferLocation(desc);
- // } else {
- // inferLoc =
- // getLocationInfo(enclosingDesc).getInferLocation(desc);
- // }
-
- Location locElement = inferLoc.get(inferLoc.getSize() - 1);
-
- locElement.setLocIdentifier(newMergeLoc);
- locInfo.addMapLocSymbolToRelatedInferLoc(newMergeLoc, enclosingDesc, desc);
-
- // if (curMethodInfo.md.equals(enclosingDesc)) {
- // inferLoc = curMethodInfo.getInferLocation(desc);
- // } else {
- // inferLoc =
- // getLocationInfo(enclosingDesc).getInferLocation(desc);
- // }
-
- inferLoc = getLocationInfo(enclosingDesc).getInferLocation(desc);
- System.out.println("---New Infer Loc=" + inferLoc);
-
- }
-
- locInfo.removeRelatedInferLocSet(oldLocSymbol, newMergeLoc);
-
- }
-
- for (Iterator iterator3 = mergeSet.iterator(); iterator3.hasNext();) {
- String oldLoc = (String) iterator3.next();
- lattice.remove(oldLoc);
- }
- return true;
- }
- }
- }
- }
- }
-
- }
- return false;
- }
-
private void checkLattices() {
LinkedList<MethodDescriptor> descriptorListToAnalyze = ssjava.getSortedDescriptors();
}
private void inferLattices() {
-
- // do fixed-point analysis
-
- ssjava.init();
- LinkedList<MethodDescriptor> descriptorListToAnalyze = ssjava.getSortedDescriptors();
-
- // Collections.sort(descriptorListToAnalyze, new
- // Comparator<MethodDescriptor>() {
- // public int compare(MethodDescriptor o1, MethodDescriptor o2) {
- // return o1.getSymbol().compareToIgnoreCase(o2.getSymbol());
- // }
- // });
-
- // current descriptors to visit in fixed-point interprocedural analysis,
- // prioritized by
- // dependency in the call graph
- methodDescriptorsToVisitStack.clear();
-
- // descriptorListToAnalyze.removeFirst();
-
- Set<MethodDescriptor> methodDescriptorToVistSet = new HashSet<MethodDescriptor>();
- methodDescriptorToVistSet.addAll(descriptorListToAnalyze);
-
- while (!descriptorListToAnalyze.isEmpty()) {
- MethodDescriptor md = descriptorListToAnalyze.removeFirst();
- methodDescriptorsToVisitStack.add(md);
- }
-
- // analyze scheduled methods until there are no more to visit
- while (!methodDescriptorsToVisitStack.isEmpty()) {
- // start to analyze leaf node
- MethodDescriptor md = methodDescriptorsToVisitStack.pop();
-
- SSJavaLattice<String> methodLattice =
- new SSJavaLattice<String>(SSJavaAnalysis.TOP, SSJavaAnalysis.BOTTOM);
-
- MethodLocationInfo methodInfo = new MethodLocationInfo(md);
- curMethodInfo = methodInfo;
-
- System.out.println();
- System.out.println("SSJAVA: Inferencing the lattice from " + md);
-
- try {
- analyzeMethodLattice(md, methodLattice, methodInfo);
- } catch (CyclicFlowException e) {
- throw new Error("Fail to generate the method lattice for " + md);
- }
-
- SSJavaLattice<String> prevMethodLattice = getMethodLattice(md);
- MethodLocationInfo prevMethodInfo = getMethodLocationInfo(md);
-
- if ((!methodLattice.equals(prevMethodLattice)) || (!methodInfo.equals(prevMethodInfo))) {
-
- setMethodLattice(md, methodLattice);
- setMethodLocInfo(md, methodInfo);
-
- // results for callee changed, so enqueue dependents caller for
- // further analysis
- Iterator<MethodDescriptor> depsItr = ssjava.getDependents(md).iterator();
- while (depsItr.hasNext()) {
- MethodDescriptor methodNext = depsItr.next();
- if (!methodDescriptorsToVisitStack.contains(methodNext)
- && methodDescriptorToVistSet.contains(methodNext)) {
- methodDescriptorsToVisitStack.add(methodNext);
- }
- }
-
- }
-
- }
-
}
private void calculateExtraLocations() {
return desc;
}
- private void analyzeMethodLattice(MethodDescriptor md, SSJavaLattice<String> methodLattice,
- MethodLocationInfo methodInfo) throws CyclicFlowException {
-
- // first take a look at method invocation nodes to newly added relations
- // from the callee
- analyzeLatticeMethodInvocationNode(md, methodLattice, methodInfo);
-
- if (!md.isStatic()) {
- // set the this location
- String thisLocSymbol = md.getThis().getSymbol();
- methodInfo.setThisLocName(thisLocSymbol);
- }
-
- // set the global location
- methodInfo.setGlobalLocName(LocationInference.GLOBALLOC);
- methodInfo.mapDescriptorToLocation(GLOBALDESC, new CompositeLocation(
- new Location(md, GLOBALLOC)));
-
- // visit each node of method flow graph
- FlowGraph fg = getFlowGraph(md);
- Set<FlowNode> nodeSet = fg.getNodeSet();
-
- // for the method lattice, we need to look at the first element of
- // NTuple<Descriptor>
- for (Iterator iterator = nodeSet.iterator(); iterator.hasNext();) {
- FlowNode srcNode = (FlowNode) iterator.next();
-
- Set<FlowEdge> outEdgeSet = fg.getOutEdgeSet(srcNode);
- for (Iterator iterator2 = outEdgeSet.iterator(); iterator2.hasNext();) {
- FlowEdge outEdge = (FlowEdge) iterator2.next();
- FlowNode dstNode = outEdge.getDst();
-
- NTuple<Descriptor> srcNodeTuple = srcNode.getDescTuple();
- NTuple<Descriptor> dstNodeTuple = dstNode.getDescTuple();
-
- if (outEdge.getInitTuple().equals(srcNodeTuple)
- && outEdge.getEndTuple().equals(dstNodeTuple)) {
-
- if ((srcNodeTuple.size() > 1 && dstNodeTuple.size() > 1)
- && srcNodeTuple.get(0).equals(dstNodeTuple.get(0))) {
-
- // value flows between fields
- Descriptor desc = srcNodeTuple.get(0);
- ClassDescriptor classDesc;
-
- if (desc.equals(GLOBALDESC)) {
- classDesc = md.getClassDesc();
- } else {
- VarDescriptor varDesc = (VarDescriptor) srcNodeTuple.get(0);
- classDesc = varDesc.getType().getClassDesc();
- }
- extractRelationFromFieldFlows(classDesc, srcNode, dstNode, 1);
-
- } else {
- // value flow between local var - local var or local var - field
- addRelationToLattice(md, methodLattice, methodInfo, srcNode, dstNode);
- }
- }
- }
- }
-
- // create mapping from param idx to inferred composite location
-
- int offset;
- if (!md.isStatic()) {
- // add 'this' reference location
- offset = 1;
- methodInfo.addMapParamIdxToInferLoc(0, methodInfo.getInferLocation(md.getThis()));
- } else {
- offset = 0;
- }
-
- for (int idx = 0; idx < md.numParameters(); idx++) {
- Descriptor paramDesc = md.getParameter(idx);
- CompositeLocation inferParamLoc = methodInfo.getInferLocation(paramDesc);
- methodInfo.addMapParamIdxToInferLoc(idx + offset, inferParamLoc);
- }
-
- }
-
- private void calculateExtraLocations(MethodDescriptor md) {
- // calcualte pcloc, returnloc,...
+ private void calculateExtraLocations(MethodDescriptor md) {
+ // calcualte pcloc, returnloc,...
SSJavaLattice<String> methodLattice = getMethodLattice(md);
MethodLocationInfo methodInfo = getMethodLocationInfo(md);
Map<Integer, CompositeLocation> mapParamToLoc = methodInfo.getMapParamIdxToInferLoc();
Set<Integer> paramIdxSet = mapParamToLoc.keySet();
- try {
- if (!ssjava.getMethodContainingSSJavaLoop().equals(md)) {
- // calculate the initial program counter location
- // PC location is higher than location types of all parameters
- String pcLocSymbol = "PCLOC";
-
- Set<CompositeLocation> paramInFlowSet = new HashSet<CompositeLocation>();
+ if (!ssjava.getMethodContainingSSJavaLoop().equals(md)) {
+ // calculate the initial program counter location
+ // PC location is higher than location types of all parameters
+ String pcLocSymbol = "PCLOC";
- for (Iterator iterator = paramIdxSet.iterator(); iterator.hasNext();) {
- Integer paramIdx = (Integer) iterator.next();
+ Set<CompositeLocation> paramInFlowSet = new HashSet<CompositeLocation>();
- FlowNode paramFlowNode = fg.getParamFlowNode(paramIdx);
+ for (Iterator iterator = paramIdxSet.iterator(); iterator.hasNext();) {
+ Integer paramIdx = (Integer) iterator.next();
- if (fg.getIncomingFlowNodeSet(paramFlowNode).size() > 0) {
- // parameter has in-value flows
- CompositeLocation inferLoc = mapParamToLoc.get(paramIdx);
- paramInFlowSet.add(inferLoc);
- }
- }
+ FlowNode paramFlowNode = fg.getParamFlowNode(paramIdx);
- if (paramInFlowSet.size() > 0) {
- CompositeLocation lowestLoc = getLowest(methodLattice, paramInFlowSet);
- assert (lowestLoc != null);
- methodInfo.setPCLoc(lowestLoc);
+ if (fg.getIncomingFlowNodeSet(paramFlowNode).size() > 0) {
+ // parameter has in-value flows
+ CompositeLocation inferLoc = mapParamToLoc.get(paramIdx);
+ paramInFlowSet.add(inferLoc);
}
+ }
+ if (paramInFlowSet.size() > 0) {
+ CompositeLocation lowestLoc = getLowest(methodLattice, paramInFlowSet);
+ assert (lowestLoc != null);
+ methodInfo.setPCLoc(lowestLoc);
}
- // calculate a return location
- // the return location type is lower than all parameters and location
- // types
- // of return values
- if (!md.getReturnType().isVoid()) {
- // first, generate the set of return value location types that starts
- // with
- // 'this' reference
-
- Set<CompositeLocation> inferFieldReturnLocSet = new HashSet<CompositeLocation>();
-
- Set<FlowNode> paramFlowNode = getParamNodeFlowingToReturnValue(md);
- Set<CompositeLocation> inferParamLocSet = new HashSet<CompositeLocation>();
- if (paramFlowNode != null) {
- for (Iterator iterator = paramFlowNode.iterator(); iterator.hasNext();) {
- FlowNode fn = (FlowNode) iterator.next();
- CompositeLocation inferLoc =
- generateInferredCompositeLocation(methodInfo, getFlowGraph(md).getLocationTuple(fn));
- inferParamLocSet.add(inferLoc);
- }
- }
+ }
- Set<FlowNode> returnNodeSet = fg.getReturnNodeSet();
+ // calculate a return location
+ // the return location type is lower than all parameters and location
+ // types
+ // of return values
+ if (!md.getReturnType().isVoid()) {
+ // first, generate the set of return value location types that starts
+ // with
+ // 'this' reference
- skip: for (Iterator iterator = returnNodeSet.iterator(); iterator.hasNext();) {
- FlowNode returnNode = (FlowNode) iterator.next();
- CompositeLocation inferReturnLoc =
- generateInferredCompositeLocation(methodInfo, fg.getLocationTuple(returnNode));
- if (inferReturnLoc.get(0).getLocIdentifier().equals("this")) {
- // if the location type of the return value matches "this" reference
- // then, check whether this return value is equal to/lower than all
- // of
- // parameters that possibly flow into the return values
- for (Iterator iterator2 = inferParamLocSet.iterator(); iterator2.hasNext();) {
- CompositeLocation paramInferLoc = (CompositeLocation) iterator2.next();
-
- if ((!paramInferLoc.equals(inferReturnLoc))
- && !isGreaterThan(methodLattice, paramInferLoc, inferReturnLoc)) {
- continue skip;
- }
- }
- inferFieldReturnLocSet.add(inferReturnLoc);
+ Set<CompositeLocation> inferFieldReturnLocSet = new HashSet<CompositeLocation>();
- }
+ Set<FlowNode> paramFlowNode = getParamNodeFlowingToReturnValue(md);
+ Set<CompositeLocation> inferParamLocSet = new HashSet<CompositeLocation>();
+ if (paramFlowNode != null) {
+ for (Iterator iterator = paramFlowNode.iterator(); iterator.hasNext();) {
+ FlowNode fn = (FlowNode) iterator.next();
+ CompositeLocation inferLoc =
+ generateInferredCompositeLocation(methodInfo, getFlowGraph(md).getLocationTuple(fn));
+ inferParamLocSet.add(inferLoc);
}
+ }
- if (inferFieldReturnLocSet.size() > 0) {
+ Set<FlowNode> returnNodeSet = fg.getReturnNodeSet();
- CompositeLocation returnLoc = getLowest(methodLattice, inferFieldReturnLocSet);
- if (returnLoc == null) {
- // in this case, assign <'this',bottom> to the RETURNLOC
- returnLoc = new CompositeLocation(new Location(md, md.getThis().getSymbol()));
- returnLoc.addLocation(new Location(md.getClassDesc(), getLattice(md.getClassDesc())
- .getBottomItem()));
- }
- methodInfo.setReturnLoc(returnLoc);
+ skip: for (Iterator iterator = returnNodeSet.iterator(); iterator.hasNext();) {
+ FlowNode returnNode = (FlowNode) iterator.next();
+ CompositeLocation inferReturnLoc =
+ generateInferredCompositeLocation(methodInfo, fg.getLocationTuple(returnNode));
+ if (inferReturnLoc.get(0).getLocIdentifier().equals("this")) {
+ // if the location type of the return value matches "this" reference
+ // then, check whether this return value is equal to/lower than all
+ // of
+ // parameters that possibly flow into the return values
+ for (Iterator iterator2 = inferParamLocSet.iterator(); iterator2.hasNext();) {
+ CompositeLocation paramInferLoc = (CompositeLocation) iterator2.next();
- } else {
- String returnLocSymbol = "RETURNLOC";
- CompositeLocation returnLocInferLoc =
- new CompositeLocation(new Location(md, returnLocSymbol));
- methodInfo.setReturnLoc(returnLocInferLoc);
-
- for (Iterator iterator = paramIdxSet.iterator(); iterator.hasNext();) {
- Integer paramIdx = (Integer) iterator.next();
- CompositeLocation inferLoc = mapParamToLoc.get(paramIdx);
- String paramLocLocalSymbol = inferLoc.get(0).getLocIdentifier();
- if (!methodLattice.isGreaterThan(paramLocLocalSymbol, returnLocSymbol)) {
- addRelationHigherToLower(methodLattice, methodInfo, paramLocLocalSymbol,
- returnLocSymbol);
+ if ((!paramInferLoc.equals(inferReturnLoc))
+ && !isGreaterThan(methodLattice, paramInferLoc, inferReturnLoc)) {
+ continue skip;
}
}
+ inferFieldReturnLocSet.add(inferReturnLoc);
- for (Iterator iterator = returnNodeSet.iterator(); iterator.hasNext();) {
- FlowNode returnNode = (FlowNode) iterator.next();
- CompositeLocation inferLoc =
- generateInferredCompositeLocation(methodInfo, fg.getLocationTuple(returnNode));
- if (!isGreaterThan(methodLattice, inferLoc, returnLocInferLoc)) {
- addRelation(methodLattice, methodInfo, inferLoc, returnLocInferLoc);
- }
+ }
+ }
+
+ if (inferFieldReturnLocSet.size() > 0) {
+
+ CompositeLocation returnLoc = getLowest(methodLattice, inferFieldReturnLocSet);
+ if (returnLoc == null) {
+ // in this case, assign <'this',bottom> to the RETURNLOC
+ returnLoc = new CompositeLocation(new Location(md, md.getThis().getSymbol()));
+ returnLoc.addLocation(new Location(md.getClassDesc(), getLattice(md.getClassDesc())
+ .getBottomItem()));
+ }
+ methodInfo.setReturnLoc(returnLoc);
+
+ } else {
+ String returnLocSymbol = "RETURNLOC";
+ CompositeLocation returnLocInferLoc =
+ new CompositeLocation(new Location(md, returnLocSymbol));
+ methodInfo.setReturnLoc(returnLocInferLoc);
+
+ for (Iterator iterator = paramIdxSet.iterator(); iterator.hasNext();) {
+ Integer paramIdx = (Integer) iterator.next();
+ CompositeLocation inferLoc = mapParamToLoc.get(paramIdx);
+ String paramLocLocalSymbol = inferLoc.get(0).getLocIdentifier();
+ if (!methodLattice.isGreaterThan(paramLocLocalSymbol, returnLocSymbol)) {
+ // TODO
+ // addRelationHigherToLower(methodLattice, methodInfo, paramLocLocalSymbol,
+ // returnLocSymbol);
}
+ }
+ for (Iterator iterator = returnNodeSet.iterator(); iterator.hasNext();) {
+ FlowNode returnNode = (FlowNode) iterator.next();
+ CompositeLocation inferLoc =
+ generateInferredCompositeLocation(methodInfo, fg.getLocationTuple(returnNode));
+ if (!isGreaterThan(methodLattice, inferLoc, returnLocInferLoc)) {
+ // TODO
+ // addRelation(methodLattice, methodInfo, inferLoc, returnLocInferLoc);
+ }
}
}
- } catch (CyclicFlowException e) {
- e.printStackTrace();
- }
+ }
}
private Set<String> getHigherLocSymbolThan(SSJavaLattice<String> lattice, String loc) {
return false;
}
- private void recursiveAddRelationToLattice(int idx, MethodDescriptor md,
- CompositeLocation srcInferLoc, CompositeLocation dstInferLoc) throws CyclicFlowException {
-
- String srcLocSymbol = srcInferLoc.get(idx).getLocIdentifier();
- String dstLocSymbol = dstInferLoc.get(idx).getLocIdentifier();
-
- if (srcLocSymbol.equals(dstLocSymbol)) {
- recursiveAddRelationToLattice(idx + 1, md, srcInferLoc, dstInferLoc);
- } else {
-
- Descriptor parentDesc = srcInferLoc.get(idx).getDescriptor();
- LocationInfo locInfo = getLocationInfo(parentDesc);
-
- addRelationHigherToLower(getLattice(parentDesc), getLocationInfo(parentDesc), srcLocSymbol,
- dstLocSymbol);
- }
-
- }
-
- // private void propagateFlowsFromCallee(MethodInvokeNode min, MethodDescriptor mdCaller,
- // MethodDescriptor mdCallee) {
- //
- // // the transformation for a call site propagates all relations between
- // // parameters from the callee
- // // if the method is virtual, it also grab all relations from any possible
- // // callees
- //
- // Set<MethodDescriptor> setPossibleCallees = new HashSet<MethodDescriptor>();
- // if (mdCallee.isStatic()) {
- // setPossibleCallees.add(mdCallee);
- // } else {
- // Set<MethodDescriptor> calleeSet = ssjava.getCallGraph().getMethods(mdCallee);
- // // removes method descriptors that are not invoked by the caller
- // calleeSet.retainAll(mapMethodToCalleeSet.get(mdCaller));
- // setPossibleCallees.addAll(calleeSet);
- // }
- //
- // for (Iterator iterator2 = setPossibleCallees.iterator(); iterator2.hasNext();) {
- // MethodDescriptor possibleMdCallee = (MethodDescriptor) iterator2.next();
- // propagateFlowsToCaller(min, mdCaller, possibleMdCallee);
- // }
- //
- // }
-
private void contributeCalleeFlows(MethodInvokeNode min, MethodDescriptor mdCaller,
MethodDescriptor mdCallee) {
}
- private FlowGraph getSubGlobalFlowGraph(MethodDescriptor md) {
+ private GlobalFlowGraph getSubGlobalFlowGraph(MethodDescriptor md) {
return mapMethodDescriptorToSubGlobalFlowGraph.get(md);
}
return tuple;
}
+ private CompositeLocation generateCompositeLocation(NTuple<Location> prefixLocTuple) {
+
+ System.out.println("generateCompositeLocation=" + prefixLocTuple);
+
+ CompositeLocation newCompLoc = new CompositeLocation();
+ for (int i = 0; i < prefixLocTuple.size(); i++) {
+ newCompLoc.addLocation(prefixLocTuple.get(i));
+ }
+
+ Descriptor lastDescOfPrefix = prefixLocTuple.get(prefixLocTuple.size() - 1).getLocDescriptor();
+
+ ClassDescriptor enclosingDescriptor;
+ if (lastDescOfPrefix instanceof FieldDescriptor) {
+ enclosingDescriptor = ((FieldDescriptor) lastDescOfPrefix).getType().getClassDesc();
+ // System.out.println("enclosingDescriptor0=" + enclosingDescriptor);
+ } else {
+ // var descriptor case
+ enclosingDescriptor = ((VarDescriptor) lastDescOfPrefix).getType().getClassDesc();
+ }
+ // System.out.println("enclosingDescriptor=" + enclosingDescriptor);
+
+ LocationDescriptor newLocDescriptor = generateNewLocationDescriptor();
+ newLocDescriptor.setEnclosingClassDesc(enclosingDescriptor);
+
+ Location newLoc = new Location(enclosingDescriptor, newLocDescriptor.getSymbol());
+ newLoc.setLocDescriptor(newLocDescriptor);
+ newCompLoc.addLocation(newLoc);
+
+ // System.out.println("--newCompLoc=" + newCompLoc);
+ return newCompLoc;
+ }
+
private CompositeLocation generateCompositeLocation(MethodDescriptor md,
NTuple<Descriptor> paramPrefix) {
return idx;
}
- private void analyzeLatticeMethodInvocationNode(MethodDescriptor mdCaller,
- SSJavaLattice<String> methodLattice, MethodLocationInfo methodInfo)
- throws CyclicFlowException {
-
- // the transformation for a call site propagates all relations between
- // parameters from the callee
- // if the method is virtual, it also grab all relations from any possible
- // callees
-
- Set<MethodInvokeNode> setMethodInvokeNode =
- mapMethodDescriptorToMethodInvokeNodeSet.get(mdCaller);
-
- if (setMethodInvokeNode != null) {
-
- for (Iterator iterator = setMethodInvokeNode.iterator(); iterator.hasNext();) {
- MethodInvokeNode min = (MethodInvokeNode) iterator.next();
- MethodDescriptor mdCallee = min.getMethod();
- Set<MethodDescriptor> setPossibleCallees = new HashSet<MethodDescriptor>();
- if (mdCallee.isStatic()) {
- setPossibleCallees.add(mdCallee);
- } else {
- Set<MethodDescriptor> calleeSet = ssjava.getCallGraph().getMethods(mdCallee);
- // removes method descriptors that are not invoked by the caller
- calleeSet.retainAll(mapMethodToCalleeSet.get(mdCaller));
- setPossibleCallees.addAll(calleeSet);
- }
-
- for (Iterator iterator2 = setPossibleCallees.iterator(); iterator2.hasNext();) {
- MethodDescriptor possibleMdCallee = (MethodDescriptor) iterator2.next();
- propagateRelationToCaller(min, mdCaller, possibleMdCallee, methodLattice, methodInfo);
- }
-
- }
- }
-
- }
-
- private void propagateRelationToCaller(MethodInvokeNode min, MethodDescriptor mdCaller,
- MethodDescriptor possibleMdCallee, SSJavaLattice<String> methodLattice,
- MethodLocationInfo methodInfo) throws CyclicFlowException {
-
- SSJavaLattice<String> calleeLattice = getMethodLattice(possibleMdCallee);
- MethodLocationInfo calleeLocInfo = getMethodLocationInfo(possibleMdCallee);
- FlowGraph calleeFlowGraph = getFlowGraph(possibleMdCallee);
-
- int numParam = calleeLocInfo.getNumParam();
- for (int i = 0; i < numParam; i++) {
- CompositeLocation param1 = calleeLocInfo.getParamCompositeLocation(i);
- for (int k = 0; k < numParam; k++) {
- if (i != k) {
- CompositeLocation param2 = calleeLocInfo.getParamCompositeLocation(k);
-
- if (isGreaterThan(getLattice(possibleMdCallee), param1, param2)) {
- // NodeTupleSet argDescTupleSet1 = getNodeTupleSetByArgIdx(min, i);
- // NodeTupleSet argDescTupleSet2 = getNodeTupleSetByArgIdx(min, k);
- NodeTupleSet argDescTupleSet1 = null;
- NodeTupleSet argDescTupleSet2 = null;
-
- // the callee has the relation in which param1 is higher than param2
- // therefore, the caller has to have the relation in which arg1 is
- // higher than arg2
-
- for (Iterator<NTuple<Descriptor>> iterator = argDescTupleSet1.iterator(); iterator
- .hasNext();) {
- NTuple<Descriptor> argDescTuple1 = iterator.next();
-
- for (Iterator<NTuple<Descriptor>> iterator2 = argDescTupleSet2.iterator(); iterator2
- .hasNext();) {
- NTuple<Descriptor> argDescTuple2 = iterator2.next();
-
- // retreive inferred location by the local var descriptor
-
- NTuple<Location> tuple1 = getFlowGraph(mdCaller).getLocationTuple(argDescTuple1);
- NTuple<Location> tuple2 = getFlowGraph(mdCaller).getLocationTuple(argDescTuple2);
-
- // CompositeLocation higherInferLoc =
- // methodInfo.getInferLocation(argTuple1.get(0));
- // CompositeLocation lowerInferLoc =
- // methodInfo.getInferLocation(argTuple2.get(0));
-
- CompositeLocation inferLoc1 = generateInferredCompositeLocation(methodInfo, tuple1);
- CompositeLocation inferLoc2 = generateInferredCompositeLocation(methodInfo, tuple2);
-
- // addRelation(methodLattice, methodInfo, inferLoc1, inferLoc2);
-
- addFlowGraphEdge(mdCaller, argDescTuple1, argDescTuple2);
-
- }
-
- }
-
- }
- }
- }
- }
-
- }
-
private CompositeLocation generateInferredCompositeLocation(MethodLocationInfo methodInfo,
NTuple<Location> tuple) {
return inferLoc;
}
- private void addRelation(SSJavaLattice<String> methodLattice, MethodLocationInfo methodInfo,
- CompositeLocation srcInferLoc, CompositeLocation dstInferLoc) throws CyclicFlowException {
-
- System.out.println("addRelation --- srcInferLoc=" + srcInferLoc + " dstInferLoc="
- + dstInferLoc);
- String srcLocalLocSymbol = srcInferLoc.get(0).getLocIdentifier();
- String dstLocalLocSymbol = dstInferLoc.get(0).getLocIdentifier();
-
- if (srcInferLoc.getSize() == 1 && dstInferLoc.getSize() == 1) {
- // add a new relation to the local lattice
- addRelationHigherToLower(methodLattice, methodInfo, srcLocalLocSymbol, dstLocalLocSymbol);
- } else if (srcInferLoc.getSize() > 1 && dstInferLoc.getSize() > 1) {
- // both src and dst have assigned to a composite location
-
- if (!srcLocalLocSymbol.equals(dstLocalLocSymbol)) {
- addRelationHigherToLower(methodLattice, methodInfo, srcLocalLocSymbol, dstLocalLocSymbol);
- } else {
- recursivelyAddRelation(1, srcInferLoc, dstInferLoc);
- }
- } else {
- // either src or dst has assigned to a composite location
- if (!srcLocalLocSymbol.equals(dstLocalLocSymbol)) {
- addRelationHigherToLower(methodLattice, methodInfo, srcLocalLocSymbol, dstLocalLocSymbol);
- }
- }
-
- System.out.println();
-
- }
-
public LocationInfo getLocationInfo(Descriptor d) {
if (d instanceof MethodDescriptor) {
return getMethodLocationInfo((MethodDescriptor) d);
}
- private void addRelationToLattice(MethodDescriptor md, SSJavaLattice<String> methodLattice,
- MethodLocationInfo methodInfo, FlowNode srcNode, FlowNode dstNode) throws CyclicFlowException {
-
- System.out.println();
- System.out.println("### addRelationToLattice src=" + srcNode + " dst=" + dstNode);
-
- // add a new binary relation of dstNode < srcNode
- FlowGraph flowGraph = getFlowGraph(md);
- try {
- System.out.println("***** src composite case::");
- calculateCompositeLocation(flowGraph, methodLattice, methodInfo, srcNode, null);
-
- CompositeLocation srcInferLoc =
- generateInferredCompositeLocation(methodInfo, flowGraph.getLocationTuple(srcNode));
- CompositeLocation dstInferLoc =
- generateInferredCompositeLocation(methodInfo, flowGraph.getLocationTuple(dstNode));
- addRelation(methodLattice, methodInfo, srcInferLoc, dstInferLoc);
- } catch (CyclicFlowException e) {
- // there is a cyclic value flow... try to calculate a composite location
- // for the destination node
- System.out.println("***** dst composite case::");
- calculateCompositeLocation(flowGraph, methodLattice, methodInfo, dstNode, srcNode);
- CompositeLocation srcInferLoc =
- generateInferredCompositeLocation(methodInfo, flowGraph.getLocationTuple(srcNode));
- CompositeLocation dstInferLoc =
- generateInferredCompositeLocation(methodInfo, flowGraph.getLocationTuple(dstNode));
- try {
- addRelation(methodLattice, methodInfo, srcInferLoc, dstInferLoc);
- } catch (CyclicFlowException e1) {
- throw new Error("Failed to merge cyclic value flows into a shared location.");
- }
- }
-
- }
-
- private void recursivelyAddRelation(int idx, CompositeLocation srcInferLoc,
- CompositeLocation dstInferLoc) throws CyclicFlowException {
-
- String srcLocSymbol = srcInferLoc.get(idx).getLocIdentifier();
- String dstLocSymbol = dstInferLoc.get(idx).getLocIdentifier();
-
- Descriptor parentDesc = srcInferLoc.get(idx).getDescriptor();
-
- if (srcLocSymbol.equals(dstLocSymbol)) {
- // check if it is the case of shared location
- if (srcInferLoc.getSize() == (idx + 1) && dstInferLoc.getSize() == (idx + 1)) {
- Location inferLocElement = srcInferLoc.get(idx);
- System.out.println("SET SHARED LOCATION=" + inferLocElement);
- getLattice(inferLocElement.getDescriptor())
- .addSharedLoc(inferLocElement.getLocIdentifier());
- } else if (srcInferLoc.getSize() > (idx + 1) && dstInferLoc.getSize() > (idx + 1)) {
- recursivelyAddRelation(idx + 1, srcInferLoc, dstInferLoc);
- }
- } else {
- addRelationHigherToLower(getLattice(parentDesc), getLocationInfo(parentDesc), srcLocSymbol,
- dstLocSymbol);
- }
- }
-
- private void recursivelyAddCompositeRelation(MethodDescriptor md, FlowGraph flowGraph,
- MethodLocationInfo methodInfo, FlowNode srcNode, FlowNode dstNode, Descriptor srcDesc,
- Descriptor dstDesc) throws CyclicFlowException {
-
- CompositeLocation inferSrcLoc;
- CompositeLocation inferDstLoc = methodInfo.getInferLocation(dstDesc);
-
- if (srcNode.getLocTuple().size() > 1) {
- // field access
- inferSrcLoc = new CompositeLocation();
-
- NTuple<Location> locTuple = flowGraph.getLocationTuple(srcNode);
- for (int i = 0; i < locTuple.size(); i++) {
- inferSrcLoc.addLocation(locTuple.get(i));
- }
-
- } else {
- inferSrcLoc = methodInfo.getInferLocation(srcDesc);
- }
-
- if (dstNode.getLocTuple().size() > 1) {
- // field access
- inferDstLoc = new CompositeLocation();
-
- NTuple<Location> locTuple = flowGraph.getLocationTuple(dstNode);
- for (int i = 0; i < locTuple.size(); i++) {
- inferDstLoc.addLocation(locTuple.get(i));
- }
-
- } else {
- inferDstLoc = methodInfo.getInferLocation(dstDesc);
- }
-
- recursiveAddRelationToLattice(1, md, inferSrcLoc, inferDstLoc);
- }
-
private void addPrefixMapping(Map<NTuple<Location>, Set<NTuple<Location>>> map,
NTuple<Location> prefix, NTuple<Location> element) {
map.get(prefix).add(element);
}
- private boolean calculateCompositeLocation(FlowGraph flowGraph,
- SSJavaLattice<String> methodLattice, MethodLocationInfo methodInfo, FlowNode flowNode,
- FlowNode srcNode) throws CyclicFlowException {
-
- Descriptor localVarDesc = flowNode.getDescTuple().get(0);
- NTuple<Location> flowNodelocTuple = flowGraph.getLocationTuple(flowNode);
-
- if (localVarDesc.equals(methodInfo.getMethodDesc())) {
- return false;
- }
-
- Set<FlowNode> inNodeSet = flowGraph.getIncomingFlowNodeSet(flowNode);
- Set<FlowNode> reachableNodeSet = flowGraph.getReachFlowNodeSetFrom(flowNode);
-
- Map<NTuple<Location>, Set<NTuple<Location>>> mapPrefixToIncomingLocTupleSet =
- new HashMap<NTuple<Location>, Set<NTuple<Location>>>();
-
- List<NTuple<Location>> prefixList = new ArrayList<NTuple<Location>>();
-
- for (Iterator iterator = inNodeSet.iterator(); iterator.hasNext();) {
- FlowNode inNode = (FlowNode) iterator.next();
- NTuple<Location> inNodeTuple = flowGraph.getLocationTuple(inNode);
-
- CompositeLocation inNodeInferredLoc =
- generateInferredCompositeLocation(methodInfo, inNodeTuple);
-
- NTuple<Location> inNodeInferredLocTuple = inNodeInferredLoc.getTuple();
-
- for (int i = 1; i < inNodeInferredLocTuple.size(); i++) {
- NTuple<Location> prefix = inNodeInferredLocTuple.subList(0, i);
- if (!prefixList.contains(prefix)) {
- prefixList.add(prefix);
- }
- addPrefixMapping(mapPrefixToIncomingLocTupleSet, prefix, inNodeInferredLocTuple);
- }
- }
-
- Collections.sort(prefixList, new Comparator<NTuple<Location>>() {
- public int compare(NTuple<Location> arg0, NTuple<Location> arg1) {
- int s0 = arg0.size();
- int s1 = arg1.size();
- if (s0 > s1) {
- return -1;
- } else if (s0 == s1) {
- return 0;
- } else {
- return 1;
- }
- }
- });
-
- // System.out.println("prefixList=" + prefixList);
- // System.out.println("reachableNodeSet=" + reachableNodeSet);
-
- // find out reachable nodes that have the longest common prefix
- for (int i = 0; i < prefixList.size(); i++) {
- NTuple<Location> curPrefix = prefixList.get(i);
- Set<NTuple<Location>> reachableCommonPrefixSet = new HashSet<NTuple<Location>>();
-
- for (Iterator iterator2 = reachableNodeSet.iterator(); iterator2.hasNext();) {
- FlowNode reachableNode = (FlowNode) iterator2.next();
- NTuple<Location> reachLocTuple = flowGraph.getLocationTuple(reachableNode);
- CompositeLocation reachLocInferLoc =
- generateInferredCompositeLocation(methodInfo, reachLocTuple);
- if (reachLocInferLoc.getTuple().startsWith(curPrefix)) {
- reachableCommonPrefixSet.add(reachLocTuple);
- }
- }
-
- if (!reachableCommonPrefixSet.isEmpty()) {
- // found reachable nodes that start with the prefix curPrefix
- // need to assign a composite location
-
- // first, check if there are more than one the set of locations that has
- // the same length of the longest reachable prefix, no way to assign
- // a composite location to the input local var
- // prefixSanityCheck(prefixList, i, flowGraph, reachableNodeSet);
-
- Set<NTuple<Location>> incomingCommonPrefixSet =
- mapPrefixToIncomingLocTupleSet.get(curPrefix);
-
- int idx = curPrefix.size();
- NTuple<Location> element = incomingCommonPrefixSet.iterator().next();
- Descriptor desc = element.get(idx).getDescriptor();
-
- SSJavaLattice<String> lattice = getLattice(desc);
- LocationInfo locInfo = getLocationInfo(desc);
-
- CompositeLocation inferLocation =
- generateInferredCompositeLocation(methodInfo, flowNodelocTuple);
-
- // methodInfo.getInferLocation(localVarDesc);
- CompositeLocation newInferLocation = new CompositeLocation();
-
- if (inferLocation.getTuple().startsWith(curPrefix)) {
- // the same infer location is already existed. no need to do
- // anything
- System.out.println("NO ATTEMPT TO MAKE A COMPOSITE LOCATION curPrefix=" + curPrefix);
-
- // TODO: refactoring!
- if (srcNode != null) {
- CompositeLocation newLoc = new CompositeLocation();
- String newLocSymbol = "Loc" + (SSJavaLattice.seed++);
- for (int locIdx = 0; locIdx < curPrefix.size(); locIdx++) {
- newLoc.addLocation(curPrefix.get(locIdx));
- }
- Location newLocationElement = new Location(desc, newLocSymbol);
- newLoc.addLocation(newLocationElement);
-
- Descriptor srcLocalVar = srcNode.getDescTuple().get(0);
- methodInfo.mapDescriptorToLocation(srcLocalVar, newLoc.clone());
- addMapLocSymbolToInferredLocation(methodInfo.getMethodDesc(), srcLocalVar, newLoc);
- methodInfo.removeMaplocalVarToLocSet(srcLocalVar);
-
- // add the field/var descriptor to the set of the location symbol
- int lastIdx = srcNode.getLocTuple().size() - 1;
- Descriptor lastFlowNodeDesc = srcNode.getDescTuple().get(lastIdx);
- NTuple<Location> srcNodelocTuple = flowGraph.getLocationTuple(srcNode);
- Descriptor enclosinglastLastFlowNodeDesc = srcNodelocTuple.get(lastIdx).getDescriptor();
-
- CompositeLocation newlyInferredLocForFlowNode =
- generateInferredCompositeLocation(methodInfo, srcNodelocTuple);
- Location lastInferLocElement =
- newlyInferredLocForFlowNode.get(newlyInferredLocForFlowNode.getSize() - 1);
- Descriptor enclosingLastInferLocElement = lastInferLocElement.getDescriptor();
-
- // getLocationInfo(enclosingLastInferLocElement).addMapLocSymbolToDescSet(
- // lastInferLocElement.getLocIdentifier(), lastFlowNodeDesc);
- getLocationInfo(enclosingLastInferLocElement).addMapLocSymbolToRelatedInferLoc(
- lastInferLocElement.getLocIdentifier(), enclosinglastLastFlowNodeDesc,
- lastFlowNodeDesc);
-
- System.out.println("@@@@@@@ ASSIGN " + newLoc + " to SRC=" + srcNode);
- }
-
- return true;
- } else {
- // assign a new composite location
-
- // String oldMethodLocationSymbol =
- // inferLocation.get(0).getLocIdentifier();
- String newLocSymbol = "Loc" + (SSJavaLattice.seed++);
- for (int locIdx = 0; locIdx < curPrefix.size(); locIdx++) {
- newInferLocation.addLocation(curPrefix.get(locIdx));
- }
- Location newLocationElement = new Location(desc, newLocSymbol);
- newInferLocation.addLocation(newLocationElement);
-
- // maps local variable to location types of the common prefix
- methodInfo.mapDescriptorToLocation(localVarDesc, newInferLocation.clone());
-
- // methodInfo.mapDescriptorToLocation(localVarDesc, newInferLocation);
- addMapLocSymbolToInferredLocation(methodInfo.getMethodDesc(), localVarDesc,
- newInferLocation);
- methodInfo.removeMaplocalVarToLocSet(localVarDesc);
-
- // add the field/var descriptor to the set of the location symbol
- int lastIdx = flowNode.getLocTuple().size() - 1;
- Descriptor lastFlowNodeDesc = flowNode.getDescTuple().get(lastIdx);
- Descriptor enclosinglastLastFlowNodeDesc = flowNodelocTuple.get(lastIdx).getDescriptor();
-
- CompositeLocation newlyInferredLocForFlowNode =
- generateInferredCompositeLocation(methodInfo, flowNodelocTuple);
- Location lastInferLocElement =
- newlyInferredLocForFlowNode.get(newlyInferredLocForFlowNode.getSize() - 1);
- Descriptor enclosingLastInferLocElement = lastInferLocElement.getDescriptor();
-
- // getLocationInfo(enclosingLastInferLocElement).addMapLocSymbolToDescSet(
- // lastInferLocElement.getLocIdentifier(), lastFlowNodeDesc);
- getLocationInfo(enclosingLastInferLocElement).addMapLocSymbolToRelatedInferLoc(
- lastInferLocElement.getLocIdentifier(), enclosinglastLastFlowNodeDesc,
- lastFlowNodeDesc);
-
- // clean up the previous location
- // Location prevInferLocElement =
- // inferLocation.get(inferLocation.getSize() - 1);
- // Descriptor prevEnclosingDesc = prevInferLocElement.getDescriptor();
- //
- // SSJavaLattice<String> targetLattice;
- // LocationInfo targetInfo;
- // if (prevEnclosingDesc.equals(methodInfo.getMethodDesc())) {
- // targetLattice = methodLattice;
- // targetInfo = methodInfo;
- // } else {
- // targetLattice = getLattice(prevInferLocElement.getDescriptor());
- // targetInfo = getLocationInfo(prevInferLocElement.getDescriptor());
- // }
- //
- // Set<Pair<Descriptor, Descriptor>> associstedDescSet =
- // targetInfo.getRelatedInferLocSet(prevInferLocElement.getLocIdentifier());
- //
- // if (associstedDescSet.size() == 1) {
- // targetLattice.remove(prevInferLocElement.getLocIdentifier());
- // } else {
- // associstedDescSet.remove(lastFlowNodeDesc);
- // }
-
- }
-
- System.out.println("curPrefix=" + curPrefix);
- System.out.println("ASSIGN NEW COMPOSITE LOCATION =" + newInferLocation + " to "
- + flowNode);
-
- String newlyInsertedLocName =
- newInferLocation.get(newInferLocation.getSize() - 1).getLocIdentifier();
-
- System.out.println("-- add in-flow");
- for (Iterator iterator = incomingCommonPrefixSet.iterator(); iterator.hasNext();) {
- NTuple<Location> tuple = (NTuple<Location>) iterator.next();
- Location loc = tuple.get(idx);
- String higher = loc.getLocIdentifier();
- addRelationHigherToLower(lattice, locInfo, higher, newlyInsertedLocName);
- }
-
- System.out.println("-- add out flow");
- for (Iterator iterator = reachableCommonPrefixSet.iterator(); iterator.hasNext();) {
- NTuple<Location> tuple = (NTuple<Location>) iterator.next();
- if (tuple.size() > idx) {
- Location loc = tuple.get(idx);
- String lower = loc.getLocIdentifier();
- // String lower =
- // locInfo.getFieldInferLocation(loc.getLocDescriptor()).getLocIdentifier();
- addRelationHigherToLower(lattice, locInfo, newlyInsertedLocName, lower);
- }
- }
-
- return true;
- }
-
- }
-
- return false;
-
- }
-
- private void addMapLocSymbolToInferredLocation(MethodDescriptor md, Descriptor localVar,
- CompositeLocation inferLoc) {
-
- Location locElement = inferLoc.get((inferLoc.getSize() - 1));
- Descriptor enclosingDesc = locElement.getDescriptor();
- LocationInfo locInfo = getLocationInfo(enclosingDesc);
- locInfo.addMapLocSymbolToRelatedInferLoc(locElement.getLocIdentifier(), md, localVar);
- }
-
- private boolean isCompositeLocation(CompositeLocation cl) {
- return cl.getSize() > 1;
- }
-
private boolean containsNonPrimitiveElement(Set<Descriptor> descSet) {
for (Iterator iterator = descSet.iterator(); iterator.hasNext();) {
Descriptor desc = (Descriptor) iterator.next();
return false;
}
- private void addRelationHigherToLower(SSJavaLattice<String> lattice, LocationInfo locInfo,
- String higher, String lower) throws CyclicFlowException {
-
- System.out.println("---addRelationHigherToLower " + higher + " -> " + lower
- + " to the lattice of " + locInfo.getDescIdentifier());
- // if (higher.equals(lower) && lattice.isSharedLoc(higher)) {
- // return;
- // }
- Set<String> cycleElementSet = lattice.getPossibleCycleElements(higher, lower);
-
- boolean hasNonPrimitiveElement = false;
- for (Iterator iterator = cycleElementSet.iterator(); iterator.hasNext();) {
- String cycleElementLocSymbol = (String) iterator.next();
-
- Set<Descriptor> descSet = locInfo.getDescSet(cycleElementLocSymbol);
- if (containsNonPrimitiveElement(descSet)) {
- hasNonPrimitiveElement = true;
- break;
- }
- }
-
- if (hasNonPrimitiveElement) {
- System.out.println("#Check cycle= " + lower + " < " + higher + " cycleElementSet="
- + cycleElementSet);
- // if there is non-primitive element in the cycle, no way to merge cyclic
- // elements into the shared location
- throw new CyclicFlowException();
- }
-
- if (cycleElementSet.size() > 0) {
-
- String newSharedLoc = "SharedLoc" + (SSJavaLattice.seed++);
-
- System.out.println("---ASSIGN NEW SHARED LOC=" + newSharedLoc + " to " + cycleElementSet);
- lattice.mergeIntoNewLocation(cycleElementSet, newSharedLoc);
- lattice.addSharedLoc(newSharedLoc);
-
- for (Iterator iterator = cycleElementSet.iterator(); iterator.hasNext();) {
- String oldLocSymbol = (String) iterator.next();
-
- Set<Pair<Descriptor, Descriptor>> inferLocSet = locInfo.getRelatedInferLocSet(oldLocSymbol);
- System.out.println("---update related locations=" + inferLocSet);
- for (Iterator iterator2 = inferLocSet.iterator(); iterator2.hasNext();) {
- Pair<Descriptor, Descriptor> pair = (Pair<Descriptor, Descriptor>) iterator2.next();
- Descriptor enclosingDesc = pair.getFirst();
- Descriptor desc = pair.getSecond();
-
- CompositeLocation inferLoc;
- if (curMethodInfo.md.equals(enclosingDesc)) {
- inferLoc = curMethodInfo.getInferLocation(desc);
- } else {
- inferLoc = getLocationInfo(enclosingDesc).getInferLocation(desc);
- }
-
- Location locElement = inferLoc.get(inferLoc.getSize() - 1);
-
- locElement.setLocIdentifier(newSharedLoc);
- locInfo.addMapLocSymbolToRelatedInferLoc(newSharedLoc, enclosingDesc, desc);
-
- if (curMethodInfo.md.equals(enclosingDesc)) {
- inferLoc = curMethodInfo.getInferLocation(desc);
- } else {
- inferLoc = getLocationInfo(enclosingDesc).getInferLocation(desc);
- }
- System.out.println("---New Infer Loc=" + inferLoc);
-
- }
- locInfo.removeRelatedInferLocSet(oldLocSymbol, newSharedLoc);
-
- }
-
- lattice.addSharedLoc(newSharedLoc);
-
- } else if (!lattice.isGreaterThan(higher, lower)) {
- lattice.addRelationHigherToLower(higher, lower);
- }
- }
-
- private void replaceOldLocWithNewLoc(SSJavaLattice<String> methodLattice, String oldLocSymbol,
- String newLocSymbol) {
-
- if (methodLattice.containsKey(oldLocSymbol)) {
- methodLattice.substituteLocation(oldLocSymbol, newLocSymbol);
- }
-
- }
-
public boolean isPrimitiveLocalVariable(FlowNode node) {
VarDescriptor varDesc = (VarDescriptor) node.getDescTuple().get(0);
return varDesc.getType().isPrimitive();
}
- private void extractRelationFromFieldFlows(ClassDescriptor cd, FlowNode srcNode,
- FlowNode dstNode, int idx) throws CyclicFlowException {
-
- if (srcNode.getLocTuple().get(idx).equals(dstNode.getLocTuple().get(idx))
- && srcNode.getLocTuple().size() > (idx + 1) && dstNode.getLocTuple().size() > (idx + 1)) {
- // value flow between fields: we don't need to add a binary relation
- // for this case
-
- Descriptor desc = srcNode.getDescTuple().get(idx);
- ClassDescriptor classDesc;
-
- if (idx == 0) {
- classDesc = ((VarDescriptor) desc).getType().getClassDesc();
- } else {
- classDesc = ((FieldDescriptor) desc).getType().getClassDesc();
- }
-
- extractRelationFromFieldFlows(classDesc, srcNode, dstNode, idx + 1);
-
- } else {
-
- Descriptor srcFieldDesc = srcNode.getDescTuple().get(idx);
- Descriptor dstFieldDesc = dstNode.getDescTuple().get(idx);
-
- // add a new binary relation of dstNode < srcNode
- SSJavaLattice<String> fieldLattice = getFieldLattice(cd);
- LocationInfo fieldInfo = getFieldLocationInfo(cd);
-
- String srcSymbol = fieldInfo.getFieldInferLocation(srcFieldDesc).getLocIdentifier();
- String dstSymbol = fieldInfo.getFieldInferLocation(dstFieldDesc).getLocIdentifier();
-
- addRelationHigherToLower(fieldLattice, fieldInfo, srcSymbol, dstSymbol);
-
- }
-
- }
-
public SSJavaLattice<String> getFieldLattice(ClassDescriptor cd) {
if (!cd2lattice.containsKey(cd)) {
cd2lattice.put(cd, new SSJavaLattice<String>(SSJavaAnalysis.TOP, SSJavaAnalysis.BOTTOM));
mapMethodDescriptorToFlowGraph.put(md, fg);
analyzeMethodBody(md.getClassDesc(), md);
+
+ System.out.println("##constructSubGlobalFlowGraph");
+ GlobalFlowGraph subGlobalFlowGraph = constructSubGlobalFlowGraph(fg);
+ mapMethodDescriptorToSubGlobalFlowGraph.put(md, subGlobalFlowGraph);
+
+ // TODO
+ System.out.println("##addValueFlowsFromCalleeSubGlobalFlowGraph");
+ addValueFlowsFromCalleeSubGlobalFlowGraph(md, subGlobalFlowGraph);
+ subGlobalFlowGraph.writeGraph("_SUBGLOBAL");
+
propagateFlowsFromCalleesWithNoCompositeLocation(md);
// assignCompositeLocation(md);
if (newImplicitTupleSet.size() > 1) {
// need to create an intermediate node for the GLB of conditional locations & implicit flows
- NTuple<Descriptor> interTuple = getFlowGraph(md).createIntermediateNode(md).getDescTuple();
+ NTuple<Descriptor> interTuple = getFlowGraph(md).createIntermediateNode().getDescTuple();
for (Iterator<NTuple<Descriptor>> idxIter = newImplicitTupleSet.iterator(); idxIter.hasNext();) {
NTuple<Descriptor> tuple = idxIter.next();
addFlowGraphEdge(md, tuple, interTuple);
currentFlowTupleSet.addTupleSet(implicitFlowTupleSet);
if (currentFlowTupleSet.size() > 1) {
- FlowNode meetNode = fg.createIntermediateNode(md);
+ FlowNode meetNode = fg.createIntermediateNode();
for (Iterator iterator = currentFlowTupleSet.iterator(); iterator.hasNext();) {
NTuple<Descriptor> currentFlowTuple = (NTuple<Descriptor>) iterator.next();
fg.addValueFlowEdge(currentFlowTuple, meetNode.getDescTuple());
if (newImplicitTupleSet.size() > 1) {
// need to create an intermediate node for the GLB of conditional locations & implicit flows
- NTuple<Descriptor> interTuple = getFlowGraph(md).createIntermediateNode(md).getDescTuple();
+ NTuple<Descriptor> interTuple = getFlowGraph(md).createIntermediateNode().getDescTuple();
for (Iterator<NTuple<Descriptor>> idxIter = newImplicitTupleSet.iterator(); idxIter
.hasNext();) {
NTuple<Descriptor> tuple = idxIter.next();
implicitFlowTupleSet, false);
// ///////////
- NTuple<Descriptor> interTuple = getFlowGraph(md).createIntermediateNode(md).getDescTuple();
+ NTuple<Descriptor> interTuple = getFlowGraph(md).createIntermediateNode().getDescTuple();
for (Iterator<NTuple<Descriptor>> idxIter = condTupleNode.iterator(); idxIter.hasNext();) {
NTuple<Descriptor> tuple = idxIter.next();
if (newImplicitTupleSet.size() > 1) {
// need to create an intermediate node for the GLB of conditional locations & implicit flows
- NTuple<Descriptor> interTuple = getFlowGraph(md).createIntermediateNode(md).getDescTuple();
+ NTuple<Descriptor> interTuple = getFlowGraph(md).createIntermediateNode().getDescTuple();
for (Iterator<NTuple<Descriptor>> idxIter = newImplicitTupleSet.iterator(); idxIter.hasNext();) {
NTuple<Descriptor> tuple = idxIter.next();
addFlowGraphEdge(md, tuple, interTuple);
// creates edges from RHS to LHS
NTuple<Descriptor> interTuple = null;
if (nodeSetRHS.size() > 1) {
- interTuple = getFlowGraph(md).createIntermediateNode(md).getDescTuple();
+ interTuple = getFlowGraph(md).createIntermediateNode().getDescTuple();
}
for (Iterator<NTuple<Descriptor>> iter = nodeSetRHS.iterator(); iter.hasNext();) {
private void analyzeFlowMethodInvokeNode(MethodDescriptor md, SymbolTable nametable,
MethodInvokeNode min, NodeTupleSet nodeSet, NodeTupleSet implicitFlowTupleSet) {
+ System.out.println("analyzeFlowMethodInvokeNode=" + min.printNode(0));
+
if (nodeSet == null) {
nodeSet = new NodeTupleSet();
}
} else {
// TODO
Set<FlowNode> inFlowSet = calleeFlowGraph.getIncomingFlowNodeSet(returnNode);
+ System.out.println("inFlowSet=" + inFlowSet + " from retrunNode=" + returnNode);
for (Iterator iterator2 = inFlowSet.iterator(); iterator2.hasNext();) {
FlowNode inFlowNode = (FlowNode) iterator2.next();
if (inFlowNode.getDescTuple().startsWith(calleeMethodDesc.getThis())) {
int idx = i + offset;
NodeTupleSet argTupleSet = new NodeTupleSet();
analyzeFlowExpressionNode(md, nametable, en, argTupleSet, false);
- // if argument is liternal node, argTuple is set to NULL.
+ // if argument is liternal node, argTuple is set to NULL
NTuple<Descriptor> argTuple = new NTuple<Descriptor>();
+ System.out.println("-argTupleSet=" + argTupleSet + " from en=" + en.printNode(0));
if (argTupleSet.size() > 1) {
NTuple<Descriptor> interTuple =
- getFlowGraph(md).createIntermediateNode(md).getDescTuple();
+ getFlowGraph(md).createIntermediateNode().getDescTuple();
for (Iterator<NTuple<Descriptor>> idxIter = argTupleSet.iterator(); idxIter.hasNext();) {
NTuple<Descriptor> tuple = idxIter.next();
addFlowGraphEdge(md, tuple, interTuple);
// propagateFlowsFromCallee(min, md, min.getMethod());
+ System.out.println("min nodeSet=" + nodeSet);
}
}
private boolean hasInFlowTo(FlowGraph fg, FlowNode inNode, Set<FlowNode> nodeSet) {
// return true if inNode has in-flows to nodeSet
- Set<FlowNode> reachableSet = fg.getReachFlowNodeSetFrom(inNode);
+
+ // Set<FlowNode> reachableSet = fg.getReachFlowNodeSetFrom(inNode);
+ Set<FlowNode> reachableSet = fg.getReachableSetFrom(inNode.getDescTuple());
+ System.out.println("inNode=" + inNode + " reachalbeSet=" + reachableSet);
+
for (Iterator iterator = reachableSet.iterator(); iterator.hasNext();) {
FlowNode fn = (FlowNode) iterator.next();
if (nodeSet.contains(fn)) {
// creates edges from RHS to LHS
NTuple<Descriptor> interTuple = null;
if (nodeSetRHS.size() > 1) {
- interTuple = getFlowGraph(md).createIntermediateNode(md).getDescTuple();
+ interTuple = getFlowGraph(md).createIntermediateNode().getDescTuple();
}
for (Iterator<NTuple<Descriptor>> iter = nodeSetRHS.iterator(); iter.hasNext();) {
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