// invoked by the method descriptor
private Map<MethodDescriptor, Set<MethodInvokeNode>> mapMethodDescriptorToMethodInvokeNodeSet;
- private Map<MethodInvokeNode, Map<Integer, NTuple<Descriptor>>> mapMethodInvokeNodeToArgIdxMap;
+ private Map<MethodInvokeNode, Map<Integer, NodeTupleSet>> mapMethodInvokeNodeToArgIdxMap;
private Map<MethodDescriptor, MethodLocationInfo> mapMethodDescToMethodLocationInfo;
this.mapMethodDescriptorToMethodInvokeNodeSet =
new HashMap<MethodDescriptor, Set<MethodInvokeNode>>();
this.mapMethodInvokeNodeToArgIdxMap =
- new HashMap<MethodInvokeNode, Map<Integer, NTuple<Descriptor>>>();
+ new HashMap<MethodInvokeNode, Map<Integer, NodeTupleSet>>();
this.mapMethodDescToMethodLocationInfo = new HashMap<MethodDescriptor, MethodLocationInfo>();
this.mapMethodToCalleeSet = new HashMap<MethodDescriptor, Set<MethodDescriptor>>();
this.mapClassToLocationInfo = new HashMap<ClassDescriptor, LocationInfo>();
System.out.println();
System.out.println("SSJAVA: Inferencing the lattice from " + md);
- analyzeMethodLattice(md, methodLattice, methodInfo);
+ 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 (i != k) {
CompositeLocation locB1 = list1.get(k);
CompositeLocation locB2 = list2.get(k);
- boolean r1 = isGreaterThan(locA1, locB1);
+ boolean r1 = isGreaterThan(getLattice(md1), locA1, locB1);
- boolean r2 = isGreaterThan(locA2, locB2);
+ boolean r2 = isGreaterThan(getLattice(md1), locA2, locB2);
if (r1 != r2) {
throw new Error("The method " + md1 + " is not consistent with the method " + md2
}
private void analyzeMethodLattice(MethodDescriptor md, SSJavaLattice<String> methodLattice,
- MethodLocationInfo methodInfo) {
+ MethodLocationInfo methodInfo) throws CyclicFlowException {
// first take a look at method invocation nodes to newly added relations
// from the callee
}
- private CompositeLocation getHighestLocation(Collection<CompositeLocation> locSet) {
-
- Iterator<CompositeLocation> locIter = locSet.iterator();
-
- CompositeLocation highest = locIter.next();
-
- for (; locIter.hasNext();) {
- CompositeLocation loc = (CompositeLocation) locIter.next();
- if (isGreaterThan(loc, highest)) {
- highest = loc;
- }
- }
-
- return highest;
-
- }
+ private boolean isGreaterThan(SSJavaLattice<String> methodLattice, CompositeLocation comp1,
+ CompositeLocation comp2) {
- private boolean isGreaterThan(CompositeLocation comp1, CompositeLocation comp2) {
+ int size = comp1.getSize() >= comp2.getSize() ? comp2.getSize() : comp1.getSize();
- for (int idx = 0; idx < comp1.getSize(); idx++) {
+ for (int idx = 0; idx < size; idx++) {
Location loc1 = comp1.get(idx);
Location loc2 = comp2.get(idx);
String symbol1 = loc1.getLocIdentifier();
String symbol2 = loc2.getLocIdentifier();
+ SSJavaLattice<String> lattice;
+ if (idx == 0) {
+ lattice = methodLattice;
+ } else {
+ lattice = getLattice(desc1);
+ }
if (symbol1.equals(symbol2)) {
continue;
- } else if (getLattice(desc1).isGreaterThan(symbol1, symbol2)) {
+ } else if (lattice.isGreaterThan(symbol1, symbol2)) {
return true;
} else {
return false;
}
private void recursiveAddRelationToLattice(int idx, MethodDescriptor md,
- CompositeLocation srcInferLoc, CompositeLocation dstInferLoc) {
+ CompositeLocation srcInferLoc, CompositeLocation dstInferLoc) throws CyclicFlowException {
String srcLocSymbol = srcInferLoc.get(idx).getLocIdentifier();
String dstLocSymbol = dstInferLoc.get(idx).getLocIdentifier();
}
private void analyzeLatticeMethodInvocationNode(MethodDescriptor mdCaller,
- SSJavaLattice<String> methodLattice, MethodLocationInfo methodInfo) {
+ SSJavaLattice<String> methodLattice, MethodLocationInfo methodInfo)
+ throws CyclicFlowException {
// the transformation for a call site propagates all relations between
// parameters from the callee
private void propagateRelationToCaller(MethodInvokeNode min, MethodDescriptor mdCaller,
MethodDescriptor possibleMdCallee, SSJavaLattice<String> methodLattice,
- MethodLocationInfo methodInfo) {
+ MethodLocationInfo methodInfo) throws CyclicFlowException {
SSJavaLattice<String> calleeLattice = getMethodLattice(possibleMdCallee);
MethodLocationInfo calleeLocInfo = getMethodLocationInfo(possibleMdCallee);
for (int k = 0; k < numParam; k++) {
if (i != k) {
CompositeLocation param2 = calleeLocInfo.getParamCompositeLocation(k);
- if (isGreaterThan(param1, param2)) {
- NTuple<Descriptor> argDescTuple1 = getArgTupleByArgIdx(min, i);
- NTuple<Descriptor> argDescTuple2 = getArgTupleByArgIdx(min, k);
- addRelation(methodLattice, methodInfo, argDescTuple1.get(0), argDescTuple2.get(0));
+ if (isGreaterThan(getLattice(possibleMdCallee), param1, param2)) {
+ NodeTupleSet argDescTupleSet1 = getNodeTupleSetByArgIdx(min, i);
+ NodeTupleSet argDescTupleSet2 = getNodeTupleSetByArgIdx(min, k);
+
+ // 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 =
+ calcualteInferredCompositeLocation(methodInfo, tuple1);
+ CompositeLocation inferLoc2 =
+ calcualteInferredCompositeLocation(methodInfo, tuple2);
+
+ addRelation(methodLattice, methodInfo, inferLoc1, inferLoc2);
+
+ }
+
+ }
+
}
}
}
}
+ private CompositeLocation calcualteInferredCompositeLocation(MethodLocationInfo methodInfo,
+ NTuple<Location> tuple) {
+
+ // first, retrieve inferred location by the local var descriptor
+
+ CompositeLocation inferLoc = new CompositeLocation();
+
+ CompositeLocation localVarInferLoc =
+ methodInfo.getInferLocation(tuple.get(0).getLocDescriptor());
+ for (int i = 0; i < localVarInferLoc.getSize(); i++) {
+ inferLoc.addLocation(localVarInferLoc.get(i));
+ }
+
+ 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);
+
+ inferLoc.addLocation(inferLocElement);
+
+ }
+
+ return inferLoc;
+ }
+
+ private void addRelation(SSJavaLattice<String> methodLattice, MethodLocationInfo methodInfo,
+ CompositeLocation srcInferLoc, CompositeLocation dstInferLoc) throws CyclicFlowException {
+
+ 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);
+ }
+ }
+
+ }
+
private 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) {
+ 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);
- Descriptor srcDesc = getDescriptor(0, srcNode);
- Descriptor dstDesc = getDescriptor(0, dstNode);
-
- // boolean isAssignedCompositeLocation = false;
- // if (!methodInfo.getInferLocation(srcDesc).get(0).getLocIdentifier()
- // .equals(methodInfo.getThisLocName())) {
- // isAssignedCompositeLocation =
calculateCompositeLocation(flowGraph, methodLattice, methodInfo, srcNode);
- // }
-
- String srcSymbol = methodInfo.getInferLocation(srcDesc).get(0).getLocIdentifier();
- String dstSymbol = methodInfo.getInferLocation(dstDesc).get(0).getLocIdentifier();
- // if (srcNode.isParameter()) {
- // int paramIdx = flowGraph.getParamIdx(srcNode.getDescTuple());
- // methodInfo.addParameter(srcSymbol, srcDesc, paramIdx);
- // }
- //
- // if (dstNode.isParameter()) {
- // int paramIdx = flowGraph.getParamIdx(dstNode.getDescTuple());
- // methodInfo.addParameter(dstSymbol, dstDesc, paramIdx);
- // }
-
- CompositeLocation srcInferLoc = methodInfo.getInferLocation(srcDesc);
- CompositeLocation dstInferLoc = methodInfo.getInferLocation(dstDesc);
-
- 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
- recursivelyAddRelation(1, srcInferLoc, dstInferLoc);
- } else {
- // either src or dst has assigned to a composite location
- if (!srcLocalLocSymbol.equals(dstLocalLocSymbol)) {
- addRelationHigherToLower(methodLattice, methodInfo, srcLocalLocSymbol, dstLocalLocSymbol);
+ CompositeLocation srcInferLoc =
+ calcualteInferredCompositeLocation(methodInfo, flowGraph.getLocationTuple(srcNode));
+ CompositeLocation dstInferLoc =
+ calcualteInferredCompositeLocation(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
+ calculateCompositeLocation(flowGraph, methodLattice, methodInfo, dstNode);
+ dstInferLoc =
+ calcualteInferredCompositeLocation(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.");
}
}
- // if (!isAssignedCompositeLocation) {
- // // source does not have a composite location
- //
- // NTuple<Location> srcTuple = flowGraph.getLocationTuple(srcNode);
- // NTuple<Location> dstTuple = flowGraph.getLocationTuple(dstNode);
- //
- // recursivelyAddCompositeRelation(md, flowGraph, methodInfo, srcNode,
- // dstNode, srcDesc, dstDSSJavaLattice<String> methodLattice,
- //
- // // if (!srcSymbol.equals(dstSymbol)) {
- // // // add a local relation
- // // if (!methodLattice.isGreaterThan(srcSymbol, dstSymbol)) {
- // // // if the lattice does not have this relation, add it
- // // addRelationHigherToLower(methodLattice, methodInfo, srcSymbol,
- // // dstSymbol);
- // // // methodLattice.addRelationHigherToLower(srcSymbol, dstSymbol);
- // // }
- // // } else {
- // // // if src and dst have the same local location...
- // // recursivelyAddCompositeRelation(md, flowGraph, methodInfo, srcNode,
- // // dstNode, srcDesc,
- // // dstDesc);
- // // }
- //
- // } else {
- // // source variable has a composite location
- // if (methodInfo.getInferLocation(dstDesc).getSize() == 1) {
- // if (!srcSymbol.equals(dstSymbol)) {
- // addRelationHigherToLower(methodLattice, methodInfo, srcSymbol,
- // dstSymbol);
- // }
- // }
- //
- // }
}
- private void addRelation(SSJavaLattice<String> methodLattice, MethodLocationInfo methodInfo,
- Descriptor srcDesc, Descriptor dstDesc) {
-
- CompositeLocation srcInferLoc = methodInfo.getInferLocation(srcDesc);
- CompositeLocation dstInferLoc = methodInfo.getInferLocation(dstDesc);
-
- 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
- recursivelyAddRelation(1, srcInferLoc, dstInferLoc);
- } else {
- // either src or dst has assigned to a composite location
- if (!srcLocalLocSymbol.equals(dstLocalLocSymbol)) {
- addRelationHigherToLower(methodLattice, methodInfo, srcLocalLocSymbol, dstLocalLocSymbol);
- }
- }
- }
-
private void recursivelyAddRelation(int idx, CompositeLocation srcInferLoc,
- CompositeLocation dstInferLoc) {
+ 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)) {
- recursivelyAddRelation(idx + 1, srcInferLoc, dstInferLoc);
+ // check if it is the case of shared location
+ if (srcInferLoc.getSize() == (idx + 1) && dstInferLoc.getSize() == (idx + 1)) {
+ Location inferLocElement = srcInferLoc.get(idx);
+ getLattice(inferLocElement.getDescriptor())
+ .addSharedLoc(inferLocElement.getLocIdentifier());
+ } else if (srcInferLoc.getSize() > (idx + 1) && dstInferLoc.getSize() > (idx + 1)) {
+ recursivelyAddRelation(idx + 1, srcInferLoc, dstInferLoc);
+ }
} else {
-
- Descriptor parentDesc = srcInferLoc.get(idx).getDescriptor();
-
addRelationHigherToLower(getLattice(parentDesc), getLocationInfo(parentDesc), srcLocSymbol,
dstLocSymbol);
}
-
}
private void recursivelyAddCompositeRelation(MethodDescriptor md, FlowGraph flowGraph,
MethodLocationInfo methodInfo, FlowNode srcNode, FlowNode dstNode, Descriptor srcDesc,
- Descriptor dstDesc) {
+ Descriptor dstDesc) throws CyclicFlowException {
CompositeLocation inferSrcLoc;
CompositeLocation inferDstLoc = methodInfo.getInferLocation(dstDesc);
}
private boolean calculateCompositeLocation(FlowGraph flowGraph,
- SSJavaLattice<String> methodLattice, MethodLocationInfo methodInfo, FlowNode flowNode) {
+ SSJavaLattice<String> methodLattice, MethodLocationInfo methodInfo, FlowNode flowNode)
+ throws CyclicFlowException {
Descriptor localVarDesc = flowNode.getDescTuple().get(0);
Set<FlowNode> localInNodeSet = new HashSet<FlowNode>();
Set<FlowNode> localOutNodeSet = new HashSet<FlowNode>();
+ CompositeLocation flowNodeInferLoc =
+ calcualteInferredCompositeLocation(methodInfo, flowGraph.getLocationTuple(flowNode));
+
List<NTuple<Location>> prefixList = new ArrayList<NTuple<Location>>();
for (Iterator iterator = inNodeSet.iterator(); iterator.hasNext();) {
if (reachLocTuple.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);
+ if (isGreaterThan(methodLattice, flowNodeInferLoc, prefixInferLoc)) {
+ reachableCommonPrefixSet.add(curPrefix);
}
if (!reachableCommonPrefixSet.isEmpty()) {
for (Iterator iterator = localInNodeSet.iterator(); iterator.hasNext();) {
FlowNode localNode = (FlowNode) iterator.next();
+
+ if (localNode.equals(flowNode)) {
+ continue;
+ }
+
Descriptor localInVarDesc = localNode.getDescTuple().get(0);
CompositeLocation inNodeInferLoc = methodInfo.getInferLocation(localInVarDesc);
}
}
+
}
for (Iterator iterator = reachableCommonPrefixSet.iterator(); iterator.hasNext();) {
NTuple<Location> tuple = (NTuple<Location>) iterator.next();
- 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);
+ 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();
+ if (localOutNode.equals(flowNode)) {
+ continue;
+ }
+
Descriptor localOutDesc = localOutNode.getDescTuple().get(0);
- // String localOutNodeSymbol =
- // localOutNode.getDescTuple().get(0).getSymbol();
CompositeLocation outNodeInferLoc = methodInfo.getInferLocation(localOutDesc);
- // System.out
- // .println("localOutNode=" + localOutNode + " outNodeInferLoc=" +
- // outNodeInferLoc);
if (isCompositeLocation(outNodeInferLoc)) {
// need to make sure that newLocSymbol is higher than the infernode
// location
}
private void addRelationHigherToLower(SSJavaLattice<String> lattice, LocationInfo locInfo,
- String higher, String lower) {
+ String higher, String lower) throws CyclicFlowException {
// if (higher.equals(lower) && lattice.isSharedLoc(higher)) {
// return;
// }
-
Set<String> cycleElementSet = lattice.getPossibleCycleElements(higher, lower);
System.out.println("#Check cycle=" + lower + " < " + higher);
System.out.println("#cycleElementSet=" + cycleElementSet);
if (hasNonPrimitiveElement) {
// if there is non-primitive element in the cycle, no way to merge cyclic
// elements into the shared location
- throw new Error("Failed to merge cyclic value flows into a shared location.");
+ throw new CyclicFlowException();
}
if (cycleElementSet.size() > 0) {
}
private void extractRelationFromFieldFlows(ClassDescriptor cd, FlowNode srcNode,
- FlowNode dstNode, int idx) {
+ FlowNode dstNode, int idx) throws CyclicFlowException {
if (srcNode.getDescTuple().get(idx).equals(dstNode.getDescTuple().get(idx))
&& srcNode.getDescTuple().size() > (idx + 1) && dstNode.getDescTuple().size() > (idx + 1)) {
flowTuple =
analyzeFlowFieldAccessNode(md, nametable, (FieldAccessNode) en, nodeSet, base,
implicitFlowTupleSet);
- nodeSet.addTuple(flowTuple);
+ if (flowTuple != null) {
+ nodeSet.addTuple(flowTuple);
+ }
return flowTuple;
case Kind.NameNode:
NodeTupleSet nameNodeSet = new NodeTupleSet();
flowTuple =
analyzeFlowNameNode(md, nametable, (NameNode) en, nameNodeSet, base, implicitFlowTupleSet);
- nodeSet.addTuple(flowTuple);
+ if (flowTuple != null) {
+ nodeSet.addTuple(flowTuple);
+ }
return flowTuple;
case Kind.OpNode:
}
- private NTuple<Descriptor> getArgTupleByArgIdx(MethodInvokeNode min, int idx) {
+ private NodeTupleSet getNodeTupleSetByArgIdx(MethodInvokeNode min, int idx) {
return mapMethodInvokeNodeToArgIdxMap.get(min).get(new Integer(idx));
}
- private void addArgIdxMap(MethodInvokeNode min, int idx, NTuple<Descriptor> argTuple) {
- Map<Integer, NTuple<Descriptor>> mapIdxToArgTuple = mapMethodInvokeNodeToArgIdxMap.get(min);
- if (mapIdxToArgTuple == null) {
- mapIdxToArgTuple = new HashMap<Integer, NTuple<Descriptor>>();
- mapMethodInvokeNodeToArgIdxMap.put(min, mapIdxToArgTuple);
+ private void addArgIdxMap(MethodInvokeNode min, int idx, NodeTupleSet tupleSet) {
+ Map<Integer, NodeTupleSet> mapIdxToTupleSet = mapMethodInvokeNodeToArgIdxMap.get(min);
+ if (mapIdxToTupleSet == null) {
+ mapIdxToTupleSet = new HashMap<Integer, NodeTupleSet>();
+ mapMethodInvokeNodeToArgIdxMap.put(min, mapIdxToTupleSet);
}
- mapIdxToArgTuple.put(new Integer(idx), argTuple);
+ mapIdxToTupleSet.put(new Integer(idx), tupleSet);
}
private void analyzeFlowMethodParameters(MethodDescriptor callermd, SymbolTable nametable,
MethodInvokeNode min) {
+
if (min.numArgs() > 0) {
int offset;
offset = 1;
NTuple<Descriptor> thisArgTuple = new NTuple<Descriptor>();
thisArgTuple.add(callermd.getThis());
- addArgIdxMap(min, 0, thisArgTuple);
+ NodeTupleSet argTupleSet = new NodeTupleSet();
+ argTupleSet.addTuple(thisArgTuple);
+ addArgIdxMap(min, 0, argTupleSet);
}
for (int i = 0; i < min.numArgs(); i++) {
ExpressionNode en = min.getArg(i);
- NTuple<Descriptor> argTuple =
- analyzeFlowExpressionNode(callermd, nametable, en, new NodeTupleSet(), false);
-
+ NodeTupleSet argTupleSet = new NodeTupleSet();
+ analyzeFlowExpressionNode(callermd, nametable, en, argTupleSet, false);
// if argument is liternal node, argTuple is set to NULL.
- addArgIdxMap(min, i + offset, argTuple);
+ addArgIdxMap(min, i + offset, argTupleSet);
}
}
nodeSet.addTupleSet(expNodeTupleSet);
nodeSet.addTupleSet(idxNodeTupleSet);
}
-
}
private void analyzeCreateObjectNode(MethodDescriptor md, SymbolTable nametable,
private NTuple<Descriptor> analyzeFlowNameNode(MethodDescriptor md, SymbolTable nametable,
NameNode nn, NodeTupleSet nodeSet, NTuple<Descriptor> base, NodeTupleSet implicitFlowTupleSet) {
+
if (base == null) {
base = new NTuple<Descriptor>();
}
NameDescriptor nd = nn.getName();
if (nd.getBase() != null) {
- analyzeFlowExpressionNode(md, nametable, nn.getExpression(), nodeSet, base,
- implicitFlowTupleSet, false);
+ base =
+ analyzeFlowExpressionNode(md, nametable, nn.getExpression(), nodeSet, base,
+ implicitFlowTupleSet, false);
+ if (base == null) {
+ // base node has the top location
+ return base;
+ }
} else {
String varname = nd.toString();
if (varname.equals("this")) {
FieldDescriptor fd = (FieldDescriptor) d;
if (fd.isStatic()) {
if (fd.isFinal()) {
- // if it is 'static final', assign the default TOP LOCATION
- // DESCRIPTOR
- base.add(TOPDESC);
- return base;
+ // if it is 'static final', no need to have flow node for the TOP
+ // location
+ return null;
} else {
// if 'static', assign the default GLOBAL LOCATION to the first
// element of the tuple
FieldAccessNode fan, NodeTupleSet nodeSet, NTuple<Descriptor> base,
NodeTupleSet implicitFlowTupleSet) {
+
ExpressionNode left = fan.getExpression();
TypeDescriptor ltd = left.getType();
FieldDescriptor fd = fan.getField();
// fanNodeSet
base =
analyzeFlowExpressionNode(md, nametable, left, nodeSet, base, implicitFlowTupleSet, false);
+ if (base == null) {
+ // in this case, field is TOP location
+ return null;
+ } else {
- if (!left.getType().isPrimitive()) {
+ if (!left.getType().isPrimitive()) {
+
+ if (fd.getSymbol().equals("length")) {
+ // array.length access, just have the location of the array
+ } else {
+ base.add(fd);
+ }
- if (fd.getSymbol().equals("length")) {
- // array.length access, just have the location of the array
- } else {
- base.add(fd);
}
- }
+ getFlowGraph(md).createNewFlowNode(base);
+ return base;
- getFlowGraph(md).createNewFlowNode(base);
- return base;
+ }
}
analyzeFlowExpressionNode(md, nametable, an.getSrc(), nodeSetRHS, null, implicitFlowTupleSet,
false);
+ // System.out.println("-analyzeFlowAssignmentNode=" + an.printNode(0));
+ // System.out.println("-nodeSetLHS=" + nodeSetLHS);
+ // System.out.println("-nodeSetRHS=" + nodeSetRHS);
+ // System.out.println("-implicitFlowTupleSet=" + implicitFlowTupleSet);
+ // System.out.println("-");
+
if (an.getOperation().getOp() >= 2 && an.getOperation().getOp() <= 12) {
// if assignment contains OP+EQ operator, creates edges from LHS to LHS
for (Iterator<NTuple<Descriptor>> iter = nodeSetLHS.iterator(); iter.hasNext();) {
}
}
+
+class CyclicFlowException extends Exception {
+
+}
projects / IRC.git / commitdiff