import IR.Tree.SwitchStatementNode;
import IR.Tree.TertiaryNode;
import IR.Tree.TreeNode;
+import Util.Pair;
public class LocationInference {
public static final Descriptor TOPDESC = new NameDescriptor(TOPLOC);
+ LocationInfo curMethodInfo;
+
boolean debug = true;
public LocationInference(SSJavaAnalysis ssjava, State state) {
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);
// 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);
&& srcNodeTuple.get(0).equals(dstNodeTuple.get(0))) {
// value flows between fields
- VarDescriptor varDesc = (VarDescriptor) srcNodeTuple.get(0);
- ClassDescriptor varClassDesc = varDesc.getType().getClassDesc();
- extractRelationFromFieldFlows(varClassDesc, srcNode, dstNode, 1);
+ 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 if (srcNodeTuple.size() == 1 || dstNodeTuple.size() == 1) {
// for the method lattice, we need to look at the first element of
// CompositeLocation lowerInferLoc =
// methodInfo.getInferLocation(argTuple2.get(0));
- CompositeLocation inferLoc1 =
- calcualteInferredCompositeLocation(methodInfo, tuple1);
- CompositeLocation inferLoc2 =
- calcualteInferredCompositeLocation(methodInfo, tuple2);
+ CompositeLocation inferLoc1 = generateInferredCompositeLocation(methodInfo, tuple1);
+ CompositeLocation inferLoc2 = generateInferredCompositeLocation(methodInfo, tuple2);
addRelation(methodLattice, methodInfo, inferLoc1, inferLoc2);
}
- private CompositeLocation calcualteInferredCompositeLocation(MethodLocationInfo methodInfo,
+ private CompositeLocation generateInferredCompositeLocation(MethodLocationInfo methodInfo,
NTuple<Location> tuple) {
+ // System.out.println("@@@@@generateInferredCompositeLocation=" + tuple);
+ // System.out.println("generateInferredCompositeLocation=" + tuple + " 0="
+ // + tuple.get(0).getLocDescriptor());
// first, retrieve inferred location by the local var descriptor
-
CompositeLocation inferLoc = new CompositeLocation();
CompositeLocation localVarInferLoc =
methodInfo.getInferLocation(tuple.get(0).getLocDescriptor());
+
+ localVarInferLoc.get(0).setLocDescriptor(tuple.get(0).getLocDescriptor());
+
for (int i = 0; i < localVarInferLoc.getSize(); i++) {
inferLoc.addLocation(localVarInferLoc.get(i));
}
+ // System.out.println("@@@@@localVarInferLoc=" + localVarInferLoc);
for (int i = 1; i < tuple.size(); i++) {
Location cur = tuple.get(i);
Descriptor enclosingDesc = cur.getDescriptor();
Descriptor curDesc = cur.getLocDescriptor();
- String fieldLocSymbol =
- getLocationInfo(enclosingDesc).getInferLocation(curDesc).get(0).getLocIdentifier();
- Location inferLocElement = new Location(enclosingDesc, fieldLocSymbol);
+ Location inferLocElement;
+ if (curDesc == null) {
+ // in this case, we have a newly generated location.
+ // System.out.println("!!! generated location=" +
+ // cur.getLocIdentifier());
+ inferLocElement = new Location(enclosingDesc, cur.getLocIdentifier());
+ } else {
+ String fieldLocSymbol =
+ getLocationInfo(enclosingDesc).getInferLocation(curDesc).get(0).getLocIdentifier();
+ inferLocElement = new Location(enclosingDesc, fieldLocSymbol);
+ inferLocElement.setLocDescriptor(curDesc);
+ }
inferLoc.addLocation(inferLocElement);
}
-
+ // System.out.println("@@@@@inferLoc=" + inferLoc);
return inferLoc;
}
private void addRelation(SSJavaLattice<String> methodLattice, MethodLocationInfo methodInfo,
CompositeLocation srcInferLoc, CompositeLocation dstInferLoc) throws CyclicFlowException {
+ System.out.println("--- srcInferLoc=" + srcInferLoc + " dstInferLoc=" + dstInferLoc);
String srcLocalLocSymbol = srcInferLoc.get(0).getLocIdentifier();
String dstLocalLocSymbol = dstInferLoc.get(0).getLocIdentifier();
}
}
+ System.out.println();
+
}
- private LocationInfo getLocationInfo(Descriptor d) {
+ public LocationInfo getLocationInfo(Descriptor d) {
if (d instanceof MethodDescriptor) {
return getMethodLocationInfo((MethodDescriptor) d);
} else {
// add a new binary relation of dstNode < srcNode
FlowGraph flowGraph = getFlowGraph(md);
+ try {
+ System.out.println("***** src composite case::");
+ calculateCompositeLocation(flowGraph, methodLattice, methodInfo, srcNode);
- calculateCompositeLocation(flowGraph, methodLattice, methodInfo, srcNode);
-
- CompositeLocation srcInferLoc =
- calcualteInferredCompositeLocation(methodInfo, flowGraph.getLocationTuple(srcNode));
- CompositeLocation dstInferLoc =
- calcualteInferredCompositeLocation(methodInfo, flowGraph.getLocationTuple(dstNode));
+ CompositeLocation srcInferLoc =
+ generateInferredCompositeLocation(methodInfo, flowGraph.getLocationTuple(srcNode));
+ CompositeLocation dstInferLoc =
+ generateInferredCompositeLocation(methodInfo, flowGraph.getLocationTuple(dstNode));
- try {
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);
- dstInferLoc =
- calcualteInferredCompositeLocation(methodInfo, flowGraph.getLocationTuple(dstNode));
+ CompositeLocation srcInferLoc =
+ generateInferredCompositeLocation(methodInfo, flowGraph.getLocationTuple(srcNode));
+ CompositeLocation dstInferLoc =
+ generateInferredCompositeLocation(methodInfo, flowGraph.getLocationTuple(dstNode));
try {
addRelation(methodLattice, methodInfo, srcInferLoc, dstInferLoc);
} catch (CyclicFlowException e1) {
// 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)) {
Descriptor localVarDesc = flowNode.getDescTuple().get(0);
+ if (localVarDesc.equals(methodInfo.getMethodDesc())) {
+ return false;
+ }
+
Set<FlowNode> inNodeSet = flowGraph.getIncomingFlowNodeSet(flowNode);
Set<FlowNode> reachableNodeSet = flowGraph.getReachableFlowNodeSet(flowNode);
Set<FlowNode> localOutNodeSet = new HashSet<FlowNode>();
CompositeLocation flowNodeInferLoc =
- calcualteInferredCompositeLocation(methodInfo, flowGraph.getLocationTuple(flowNode));
+ generateInferredCompositeLocation(methodInfo, flowGraph.getLocationTuple(flowNode));
List<NTuple<Location>> prefixList = new ArrayList<NTuple<Location>>();
for (Iterator iterator = inNodeSet.iterator(); iterator.hasNext();) {
FlowNode inNode = (FlowNode) iterator.next();
- NTuple<Location> inTuple = flowGraph.getLocationTuple(inNode);
+ NTuple<Location> inNodeTuple = flowGraph.getLocationTuple(inNode);
+
+ CompositeLocation inNodeInferredLoc =
+ generateInferredCompositeLocation(methodInfo, inNodeTuple);
- if (inTuple.size() > 1) {
- for (int i = 1; i < inTuple.size(); i++) {
- NTuple<Location> prefix = inTuple.subList(0, i);
+ NTuple<Location> inNodeInferredLocTuple = inNodeInferredLoc.getTuple();
+
+ if (inNodeTuple.size() > 1) {
+ 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, inTuple);
+ addPrefixMapping(mapPrefixToIncomingLocTupleSet, prefix, inNodeInferredLocTuple);
}
} else {
localInNodeSet.add(inNode);
for (Iterator iterator2 = reachableNodeSet.iterator(); iterator2.hasNext();) {
FlowNode reachableNode = (FlowNode) iterator2.next();
NTuple<Location> reachLocTuple = flowGraph.getLocationTuple(reachableNode);
- if (reachLocTuple.startsWith(curPrefix)) {
+ CompositeLocation reachLocInferLoc =
+ generateInferredCompositeLocation(methodInfo, reachLocTuple);
+ if (reachLocInferLoc.getTuple().startsWith(curPrefix)) {
reachableCommonPrefixSet.add(reachLocTuple);
}
}
// check if the lattice has the relation in which higher prefix is
// actually lower than the current node
- CompositeLocation prefixInferLoc = calcualteInferredCompositeLocation(methodInfo, curPrefix);
+ CompositeLocation prefixInferLoc = generateInferredCompositeLocation(methodInfo, curPrefix);
if (isGreaterThan(methodLattice, flowNodeInferLoc, prefixInferLoc)) {
reachableCommonPrefixSet.add(curPrefix);
}
SSJavaLattice<String> lattice = getLattice(desc);
LocationInfo locInfo = getLocationInfo(desc);
- // CompositeLocation inferLocation =
- // methodInfo.getInferLocation(flowNode);
CompositeLocation inferLocation = methodInfo.getInferLocation(localVarDesc);
+ CompositeLocation newInferLocation = new CompositeLocation();
- String newlyInsertedLocName;
- if (inferLocation.getSize() == 1) {
- // need to replace the old local location with a new composite
- // location
-
- String oldMethodLocationSymbol = inferLocation.get(0).getLocIdentifier();
+ if (inferLocation.getTuple().startsWith(curPrefix)) {
+ // the same infer location is already existed. no need to do
+ // anything
+ return true;
+ } else {
+ // assign a new composite location
+ // String oldMethodLocationSymbol =
+ // inferLocation.get(0).getLocIdentifier();
String newLocSymbol = "Loc" + (SSJavaLattice.seed++);
- inferLocation = new CompositeLocation();
for (int locIdx = 0; locIdx < curPrefix.size(); locIdx++) {
- inferLocation.addLocation(curPrefix.get(locIdx));
+ newInferLocation.addLocation(curPrefix.get(locIdx));
}
Location fieldLoc = new Location(desc, newLocSymbol);
- inferLocation.addLocation(fieldLoc);
+ newInferLocation.addLocation(fieldLoc);
+
+ NTuple<Location> locTuple = flowGraph.getLocationTuple(flowNode);
+ for (int tidx = 1; tidx < locTuple.size(); tidx++) {
+ Location cur = locTuple.get(tidx);
+ Descriptor enclosingDesc = cur.getDescriptor();
+ Descriptor curDesc = cur.getLocDescriptor();
+ Location inferLocElement;
+ if (curDesc == null) {
+ // in this case, we have a newly generated location.
+ inferLocElement = new Location(enclosingDesc, cur.getLocIdentifier());
+ } else {
+ String fieldLocSymbol =
+ getLocationInfo(enclosingDesc).getInferLocation(curDesc).get(0)
+ .getLocIdentifier();
+ inferLocElement = new Location(enclosingDesc, fieldLocSymbol);
+ inferLocElement.setLocDescriptor(curDesc);
+ }
+ newInferLocation.addLocation(inferLocElement);
+ }
- methodInfo.mapDescriptorToLocation(localVarDesc, inferLocation);
+ methodInfo.mapDescriptorToLocation(localVarDesc, newInferLocation);
+ addMapLocSymbolToInferredLocation(methodInfo.getMethodDesc(), localVarDesc,
+ newInferLocation);
methodInfo.removeMaplocalVarToLocSet(localVarDesc);
- String newMethodLocationSymbol = curPrefix.get(0).getLocIdentifier();
-
- replaceOldLocWithNewLoc(methodLattice, oldMethodLocationSymbol, newMethodLocationSymbol);
-
- } else {
-
- String localLocName = methodInfo.getInferLocation(localVarDesc).get(0).getLocIdentifier();
- return true;
-
}
- newlyInsertedLocName = inferLocation.get(inferLocation.getSize() - 1).getLocIdentifier();
+ String newlyInsertedLocName =
+ newInferLocation.get(inferLocation.getSize() - 1).getLocIdentifier();
for (Iterator iterator = incomingCommonPrefixSet.iterator(); iterator.hasNext();) {
NTuple<Location> tuple = (NTuple<Location>) iterator.next();
-
Location loc = tuple.get(idx);
String higher = locInfo.getFieldInferLocation(loc.getLocDescriptor()).getLocIdentifier();
- System.out.println("--");
- System.out.println("add in-flow relation:");
addRelationHigherToLower(lattice, locInfo, higher, newlyInsertedLocName);
}
- System.out.println("end of add-inflow relation");
for (Iterator iterator = localInNodeSet.iterator(); iterator.hasNext();) {
FlowNode localNode = (FlowNode) iterator.next();
continue;
}
- Descriptor localInVarDesc = localNode.getDescTuple().get(0);
- CompositeLocation inNodeInferLoc = methodInfo.getInferLocation(localInVarDesc);
+ CompositeLocation inNodeInferLoc =
+ generateInferredCompositeLocation(methodInfo, flowGraph.getLocationTuple(localNode));
if (isCompositeLocation(inNodeInferLoc)) {
// need to make sure that newLocSymbol is lower than the infernode
// location in the field lattice
-
- if (inNodeInferLoc.getTuple().startsWith(curPrefix)
- && inNodeInferLoc.getSize() == (curPrefix.size() + 1)) {
- String higher = inNodeInferLoc.get(inNodeInferLoc.getSize() - 1).getLocIdentifier();
- if (!higher.equals(newlyInsertedLocName)) {
- System.out.println("add localInNodeSet relation:");
- addRelationHigherToLower(lattice, locInfo, higher, newlyInsertedLocName);
- }
- } else {
- throw new Error("Failed to generate a composite location.");
- }
+ System.out.println("----srcNode=" + localNode + " dstNode=" + flowNode);
+ addRelationToLattice(methodInfo.getMethodDesc(), methodLattice, methodInfo, localNode,
+ flowNode);
}
if (tuple.size() > idx) {
Location loc = tuple.get(idx);
String lower = locInfo.getFieldInferLocation(loc.getLocDescriptor()).getLocIdentifier();
- // lattice.addRelationHigherToLower(newlyInsertedLocName, lower);
- System.out.println("add out-flow relation:");
addRelationHigherToLower(lattice, locInfo, newlyInsertedLocName, lower);
}
}
- System.out.println("end of add out-flow relation");
for (Iterator iterator = localOutNodeSet.iterator(); iterator.hasNext();) {
FlowNode localOutNode = (FlowNode) iterator.next();
continue;
}
- Descriptor localOutDesc = localOutNode.getDescTuple().get(0);
- CompositeLocation outNodeInferLoc = methodInfo.getInferLocation(localOutDesc);
+ CompositeLocation outNodeInferLoc =
+ generateInferredCompositeLocation(methodInfo,
+ flowGraph.getLocationTuple(localOutNode));
if (isCompositeLocation(outNodeInferLoc)) {
// need to make sure that newLocSymbol is higher than the infernode
// location
+ System.out.println("--- srcNode=" + flowNode + " dstNode=" + localOutNode);
+ addRelationToLattice(methodInfo.getMethodDesc(), methodLattice, methodInfo, flowNode,
+ localOutNode);
- if (outNodeInferLoc.getTuple().startsWith(curPrefix)
- && outNodeInferLoc.getSize() == (curPrefix.size() + 1)) {
-
- String lower = outNodeInferLoc.get(outNodeInferLoc.getSize() - 1).getLocIdentifier();
- System.out.println("add outNodeInferLoc relation:");
-
- addRelationHigherToLower(lattice, locInfo, newlyInsertedLocName, lower);
-
- } else {
- throw new Error("Failed to generate a composite location.");
- }
}
}
}
+ 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;
}
// return;
// }
Set<String> cycleElementSet = lattice.getPossibleCycleElements(higher, lower);
- System.out.println("#Check cycle=" + lower + " < " + higher);
- System.out.println("#cycleElementSet=" + cycleElementSet);
boolean hasNonPrimitiveElement = false;
for (Iterator iterator = cycleElementSet.iterator(); iterator.hasNext();) {
}
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("$$$ASSIGN NEW SHARED LOC=" + newSharedLoc + " to " + cycleElementSet);
lattice.mergeIntoSharedLocation(cycleElementSet, newSharedLoc);
for (Iterator iterator = cycleElementSet.iterator(); iterator.hasNext();) {
String oldLocSymbol = (String) iterator.next();
- locInfo.mergeMapping(oldLocSymbol, newSharedLoc);
+
+ Set<Pair<Descriptor, Descriptor>> inferLocSet = locInfo.getRelatedInferLocSet(oldLocSymbol);
+ System.out.println("$$$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);
case Kind.FieldAccessNode:
flowTuple =
analyzeFlowFieldAccessNode(md, nametable, (FieldAccessNode) en, nodeSet, base,
- implicitFlowTupleSet);
+ implicitFlowTupleSet, isLHS);
if (flowTuple != null) {
nodeSet.addTuple(flowTuple);
}
private void analyzeFlowMethodParameters(MethodDescriptor callermd, SymbolTable nametable,
MethodInvokeNode min) {
-
if (min.numArgs() > 0) {
int offset;
private NTuple<Descriptor> analyzeFlowNameNode(MethodDescriptor md, SymbolTable nametable,
NameNode nn, NodeTupleSet nodeSet, NTuple<Descriptor> base, NodeTupleSet implicitFlowTupleSet) {
-
if (base == null) {
base = new NTuple<Descriptor>();
}
private NTuple<Descriptor> analyzeFlowFieldAccessNode(MethodDescriptor md, SymbolTable nametable,
FieldAccessNode fan, NodeTupleSet nodeSet, NTuple<Descriptor> base,
- NodeTupleSet implicitFlowTupleSet) {
-
+ NodeTupleSet implicitFlowTupleSet, boolean isLHS) {
ExpressionNode left = fan.getExpression();
TypeDescriptor ltd = left.getType();
if (ltd.isClassNameRef() || (varName != null && varName.equals("this"))) {
// using a class name directly or access using this
if (fd.isStatic() && fd.isFinal()) {
- // loc.addLocation(Location.createTopLocation(md));
- // return loc;
+ return null;
}
}
if (left instanceof ArrayAccessNode) {
+
ArrayAccessNode aan = (ArrayAccessNode) left;
left = aan.getExpression();
+ analyzeFlowExpressionNode(md, nametable, aan.getIndex(), nodeSet, base, implicitFlowTupleSet,
+ isLHS);
}
// fanNodeSet
base =
- analyzeFlowExpressionNode(md, nametable, left, nodeSet, base, implicitFlowTupleSet, false);
+ analyzeFlowExpressionNode(md, nametable, left, nodeSet, base, implicitFlowTupleSet, isLHS);
if (base == null) {
// in this case, field is TOP location
return null;
if (!left.getType().isPrimitive()) {
- if (fd.getSymbol().equals("length")) {
+ if (!fd.getSymbol().equals("length")) {
// array.length access, just have the location of the array
- } else {
base.add(fd);
}
addFlowGraphEdge(md, tuple, tuple);
}
+ // creates edges from implicitFlowTupleSet to LHS
+ for (Iterator<NTuple<Descriptor>> iter = implicitFlowTupleSet.iterator(); iter.hasNext();) {
+ NTuple<Descriptor> fromTuple = iter.next();
+ for (Iterator<NTuple<Descriptor>> iter2 = nodeSetLHS.iterator(); iter2.hasNext();) {
+ NTuple<Descriptor> toTuple = iter2.next();
+ addFlowGraphEdge(md, fromTuple, toTuple);
+ }
+ }
+
}
}
projects / IRC.git / blobdiff