import IR.Tree.SwitchStatementNode;
import IR.Tree.TertiaryNode;
import IR.Tree.TreeNode;
+import Util.Pair;
public class LocationInference {
// 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;
private Map<ClassDescriptor, LocationInfo> mapClassToLocationInfo;
- private Map<MethodDescriptor, Set<MethodDescriptor>> mapMethodDescToPossibleMethodDescSet;
+ private Map<MethodDescriptor, Set<MethodDescriptor>> mapMethodToCalleeSet;
public static final String GLOBALLOC = "GLOBALLOC";
public static final Descriptor TOPDESC = new NameDescriptor(TOPLOC);
+ LocationInfo curMethodInfo;
+
boolean debug = true;
public LocationInference(SSJavaAnalysis ssjava, State state) {
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.mapMethodDescToPossibleMethodDescSet =
- new HashMap<MethodDescriptor, Set<MethodDescriptor>>();
+ this.mapMethodToCalleeSet = new HashMap<MethodDescriptor, Set<MethodDescriptor>>();
this.mapClassToLocationInfo = new HashMap<ClassDescriptor, LocationInfo>();
}
// dependency in the call graph
methodDescriptorsToVisitStack.clear();
- descriptorListToAnalyze.removeFirst();
+ // descriptorListToAnalyze.removeFirst();
Set<MethodDescriptor> methodDescriptorToVistSet = new HashSet<MethodDescriptor>();
methodDescriptorToVistSet.addAll(descriptorListToAnalyze);
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);
- 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
- analyzeLatticeMethodInvocationNode(md);
+ analyzeLatticeMethodInvocationNode(md, methodLattice, methodInfo);
- // set the this location
- String thisLocSymbol = md.getThis().getSymbol();
- methodInfo.setThisLocName(thisLocSymbol);
+ 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);
&& 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
}
// calculate a return location
+ // the return location type is lower than all parameters
if (!md.getReturnType().isVoid()) {
- Set<FlowNode> returnNodeSet = fg.getReturnNodeSet();
- Set<String> returnVarSymbolSet = new HashSet<String>();
-
- for (Iterator iterator = returnNodeSet.iterator(); iterator.hasNext();) {
- FlowNode rtrNode = (FlowNode) iterator.next();
- String localSymbol =
- methodInfo.getInferLocation(rtrNode.getDescTuple().get(0)).get(0).getLocIdentifier();
- returnVarSymbolSet.add(localSymbol);
- }
- String returnGLB = methodLattice.getGLB(returnVarSymbolSet);
- if (returnGLB.equals(SSJavaAnalysis.BOTTOM)) {
- // need to insert a new location in-between the bottom and all
- // locations
- // that is directly connected to the bottom
- String returnNewLocationSymbol = "Loc" + (SSJavaLattice.seed++);
- methodLattice.insertNewLocationAtOneLevelHigher(returnGLB, returnNewLocationSymbol);
- methodInfo.setReturnLocName(returnNewLocationSymbol);
- } else {
- methodInfo.setReturnLocName(returnGLB);
- }
- }
+ String returnLocSymbol = "RETURNLOC";
- }
-
- 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;
+ for (Iterator iterator = keySet.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);
+ }
}
}
- return highest;
-
}
- private boolean isGreaterThan(CompositeLocation comp1, CompositeLocation comp2) {
+ private boolean isGreaterThan(SSJavaLattice<String> methodLattice, CompositeLocation comp1,
+ CompositeLocation comp2) {
- for (int idx = 0; idx < comp1.getSize(); idx++) {
+ int size = comp1.getSize() >= comp2.getSize() ? comp2.getSize() : comp1.getSize();
+
+ 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) {
+ 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
Set<MethodInvokeNode> setMethodInvokeNode =
mapMethodDescriptorToMethodInvokeNodeSet.get(mdCaller);
+
if (setMethodInvokeNode != null) {
for (Iterator iterator = setMethodInvokeNode.iterator(); iterator.hasNext();) {
if (mdCallee.isStatic()) {
setPossibleCallees.add(mdCallee);
} else {
- setPossibleCallees.addAll(ssjava.getCallGraph().getMethods(mdCallee));
+ 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);
}
- System.out.println("mdCaller=" + mdCaller + " setPossibleCallees=" + setPossibleCallees);
for (Iterator iterator2 = setPossibleCallees.iterator(); iterator2.hasNext();) {
MethodDescriptor possibleMdCallee = (MethodDescriptor) iterator2.next();
- propagateRelationToCaller(min, mdCaller, possibleMdCallee);
+ propagateRelationToCaller(min, mdCaller, possibleMdCallee, methodLattice, methodInfo);
}
}
}
private void propagateRelationToCaller(MethodInvokeNode min, MethodDescriptor mdCaller,
- MethodDescriptor possibleMdCallee) {
+ MethodDescriptor possibleMdCallee, SSJavaLattice<String> methodLattice,
+ MethodLocationInfo methodInfo) throws CyclicFlowException {
SSJavaLattice<String> calleeLattice = getMethodLattice(possibleMdCallee);
-
+ MethodLocationInfo calleeLocInfo = getMethodLocationInfo(possibleMdCallee);
FlowGraph calleeFlowGraph = getFlowGraph(possibleMdCallee);
- System.out.println("calleeFlowGraph=" + calleeFlowGraph + " of " + possibleMdCallee);
- // find parameter node
- Set<FlowNode> paramNodeSet = calleeFlowGraph.getParameterNodeSet();
-
- for (Iterator iterator = paramNodeSet.iterator(); iterator.hasNext();) {
- FlowNode paramFlowNode1 = (FlowNode) iterator.next();
-
- for (Iterator iterator2 = paramNodeSet.iterator(); iterator2.hasNext();) {
- FlowNode paramFlowNode2 = (FlowNode) iterator2.next();
-
- String paramSymbol1 = getSymbol(0, paramFlowNode1);
- String paramSymbol2 = getSymbol(0, paramFlowNode2);
- // if two parameters have a relation, we need to propagate this relation
- // to the caller
- if (!(paramSymbol1.equals(paramSymbol2))
- && calleeLattice.isComparable(paramSymbol1, paramSymbol2)) {
- int higherLocIdxCallee;
- int lowerLocIdxCallee;
- if (calleeLattice.isGreaterThan(paramSymbol1, paramSymbol2)) {
- higherLocIdxCallee = calleeFlowGraph.getParamIdx(paramFlowNode1.getDescTuple());
- lowerLocIdxCallee = calleeFlowGraph.getParamIdx(paramFlowNode2.getDescTuple());
- } else {
- higherLocIdxCallee = calleeFlowGraph.getParamIdx(paramFlowNode2.getDescTuple());
- lowerLocIdxCallee = calleeFlowGraph.getParamIdx(paramFlowNode1.getDescTuple());
- }
+ 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);
- NTuple<Descriptor> higherArg = getArgTupleByArgIdx(min, higherLocIdxCallee);
- NTuple<Descriptor> lowerArg = getArgTupleByArgIdx(min, lowerLocIdxCallee);
+ // 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
- if (higherArg != null && lowerArg != null) {
- // if the argument has the TOP location, getArgTupleByArgIdx returns
- // null
- addFlowGraphEdge(mdCaller, higherArg, lowerArg);
- }
+ 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) {
+
+ // 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();
+ 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("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();
}
- private LocationInfo getLocationInfo(Descriptor d) {
+ public LocationInfo getLocationInfo(Descriptor d) {
if (d instanceof MethodDescriptor) {
return getMethodLocationInfo((MethodDescriptor) d);
} else {
}
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);
+ try {
+ System.out.println("***** src composite case::");
+ calculateCompositeLocation(flowGraph, methodLattice, methodInfo, srcNode);
+
+ 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);
+ 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.");
}
}
- // 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, dstDesc);
- //
- // // 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 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);
+ 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 {
-
- 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);
+ if (localVarDesc.equals(methodInfo.getMethodDesc())) {
+ return false;
+ }
+
Set<FlowNode> inNodeSet = flowGraph.getIncomingFlowNodeSet(flowNode);
Set<FlowNode> reachableNodeSet = flowGraph.getReachableFlowNodeSet(flowNode);
Set<FlowNode> localInNodeSet = new HashSet<FlowNode>();
Set<FlowNode> localOutNodeSet = new HashSet<FlowNode>();
+ CompositeLocation flowNodeInferLoc =
+ 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 = generateInferredCompositeLocation(methodInfo, curPrefix);
+ if (isGreaterThan(methodLattice, flowNodeInferLoc, prefixInferLoc)) {
+ reachableCommonPrefixSet.add(curPrefix);
}
if (!reachableCommonPrefixSet.isEmpty()) {
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);
- methodInfo.mapDescriptorToLocation(localVarDesc, inferLocation);
- methodInfo.removeMaplocalVarToLocSet(localVarDesc);
-
- String newMethodLocationSymbol = curPrefix.get(0).getLocIdentifier();
-
- replaceOldLocWithNewLoc(methodLattice, oldMethodLocationSymbol, newMethodLocationSymbol);
+ if (flowNode.getDescTuple().size() == 1) {
+ // maps local variable to location types of the common prefix
+ methodInfo.mapDescriptorToLocation(localVarDesc, newInferLocation.clone());
+ }
- } else {
+ // methodInfo.mapDescriptorToLocation(localVarDesc, newInferLocation);
+ addMapLocSymbolToInferredLocation(methodInfo.getMethodDesc(), localVarDesc,
+ newInferLocation);
+ methodInfo.removeMaplocalVarToLocSet(localVarDesc);
- String localLocName = methodInfo.getInferLocation(localVarDesc).get(0).getLocIdentifier();
- return true;
+ // add the field/var descriptor to the set of the location symbol
+ int flowNodeTupleSize = flowNode.getDescTuple().size();
+ Descriptor lastFlowNodeDesc = flowNode.getDescTuple().get(flowNodeTupleSize - 1);
+ int inferLocSize = newInferLocation.getSize();
+ Location lastLoc = newInferLocation.get(inferLocSize - 1);
+ Descriptor enclosingDesc = lastLoc.getDescriptor();
+ getLocationInfo(enclosingDesc).addMapLocSymbolToDescSet(lastLoc.getLocIdentifier(),
+ 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);
+ // }
}
- newlyInsertedLocName = inferLocation.get(inferLocation.getSize() - 1).getLocIdentifier();
+ 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();
-
+ System.out.println("--in-flow tuple=" + tuple);
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");
+ System.out.println("-- add local in-flow");
for (Iterator iterator = localInNodeSet.iterator(); iterator.hasNext();) {
FlowNode localNode = (FlowNode) iterator.next();
- Descriptor localInVarDesc = localNode.getDescTuple().get(0);
- CompositeLocation inNodeInferLoc = methodInfo.getInferLocation(localInVarDesc);
+
+ if (localNode.equals(flowNode)) {
+ continue;
+ }
+
+ 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);
}
+
}
+ System.out.println("-- add out flow");
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();
+ addRelationHigherToLower(lattice, locInfo, newlyInsertedLocName, lower);
+ }
}
- System.out.println("end of add out-flow relation");
+ System.out.println("-- add local out flow");
for (Iterator iterator = localOutNodeSet.iterator(); iterator.hasNext();) {
FlowNode localOutNode = (FlowNode) iterator.next();
- Descriptor localOutDesc = localOutNode.getDescTuple().get(0);
- // String localOutNodeSymbol =
- // localOutNode.getDescTuple().get(0).getSymbol();
- CompositeLocation outNodeInferLoc = methodInfo.getInferLocation(localOutDesc);
+ if (localOutNode.equals(flowNode)) {
+ continue;
+ }
+
+ CompositeLocation outNodeInferLoc =
+ generateInferredCompositeLocation(methodInfo,
+ flowGraph.getLocationTuple(localOutNode));
- // System.out
- // .println("localOutNode=" + localOutNode + " outNodeInferLoc=" +
- // outNodeInferLoc);
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.");
- }
}
}
+ System.out.println("-- end of add local out flow");
return true;
}
}
+ 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 void addRelationHigherToLower(SSJavaLattice<String> lattice, LocationInfo locInfo,
- String higher, String lower) {
+ 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);
- 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 Error("Failed to merge cyclic value flows into a 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);
}
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)) {
public void constructFlowGraph() {
setupToAnalyze();
-
- Set<MethodDescriptor> visited=new HashSet<MethodDescriptor>();
+
+ Set<MethodDescriptor> visited = new HashSet<MethodDescriptor>();
+ Set<MethodDescriptor> reachableCallee = new HashSet<MethodDescriptor>();
while (!toAnalyzeIsEmpty()) {
ClassDescriptor cd = toAnalyzeNext();
setupToAnalazeMethod(cd);
+ toanalyzeMethodList.removeAll(visited);
+
while (!toAnalyzeMethodIsEmpty()) {
MethodDescriptor md = toAnalyzeMethodNext();
-// if (ssjava.needTobeAnnotated(md)) {
+ if ((!visited.contains(md))
+ && (ssjava.needTobeAnnotated(md) || reachableCallee.contains(md))) {
if (state.SSJAVADEBUG) {
System.out.println();
System.out.println("SSJAVA: Constructing a flow graph: " + md);
} else {
setPossibleCallees.addAll(ssjava.getCallGraph().getMethods(md));
}
-
- Set<MethodDescriptor> calleeSet=ssjava.getCallGraph().getCalleeSet(md);
-
+
+ Set<MethodDescriptor> calleeSet = ssjava.getCallGraph().getCalleeSet(md);
+ Set<MethodDescriptor> needToAnalyzeCalleeSet = new HashSet<MethodDescriptor>();
+
for (Iterator iterator = calleeSet.iterator(); iterator.hasNext();) {
MethodDescriptor calleemd = (MethodDescriptor) iterator.next();
- if((!ssjava.isSSJavaUtil(calleemd.getClassDesc())) && (! visited.contains(calleemd))){
- toanalyzeMethodList.add(calleemd);
+ if ((!ssjava.isTrustMethod(calleemd))
+ && (!ssjava.isSSJavaUtil(calleemd.getClassDesc()))) {
+ if (!visited.contains(calleemd)) {
+ toanalyzeMethodList.add(calleemd);
+ }
+ reachableCallee.add(calleemd);
+ needToAnalyzeCalleeSet.add(calleemd);
}
}
- mapMethodDescToPossibleMethodDescSet.put(md, setPossibleCallees);
+ mapMethodToCalleeSet.put(md, needToAnalyzeCalleeSet);
// creates a mapping from a parameter descriptor to its index
Map<Descriptor, Integer> mapParamDescToIdx = new HashMap<Descriptor, Integer>();
visited.add(md);
analyzeMethodBody(cd, md);
-
+
}
}
-// }
+ }
_debug_printGraph();
}
switch (en.kind()) {
case Kind.AssignmentNode:
- analyzeFlowAssignmentNode(md, nametable, (AssignmentNode) en, base, implicitFlowTupleSet);
+ analyzeFlowAssignmentNode(md, nametable, (AssignmentNode) en, nodeSet, base,
+ implicitFlowTupleSet);
break;
case Kind.FieldAccessNode:
flowTuple =
analyzeFlowFieldAccessNode(md, nametable, (FieldAccessNode) en, nodeSet, base,
- implicitFlowTupleSet);
- nodeSet.addTuple(flowTuple);
+ implicitFlowTupleSet, isLHS);
+ 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:
break;
case Kind.CastNode:
- analyzeFlowCastNode(md, nametable, (CastNode) en, implicitFlowTupleSet);
+ analyzeFlowCastNode(md, nametable, (CastNode) en, nodeSet, base, implicitFlowTupleSet);
break;
-
// case Kind.InstanceOfNode:
// checkInstanceOfNode(md, nametable, (InstanceOfNode) en, td);
// return null;
}
private void analyzeFlowCastNode(MethodDescriptor md, SymbolTable nametable, CastNode cn,
- NodeTupleSet implicitFlowTupleSet) {
+ NodeTupleSet nodeSet, NTuple<Descriptor> base, NodeTupleSet implicitFlowTupleSet) {
- NodeTupleSet nodeTupleSet = new NodeTupleSet();
- analyzeFlowExpressionNode(md, nametable, cn.getExpression(), nodeTupleSet, false);
+ analyzeFlowExpressionNode(md, nametable, cn.getExpression(), nodeSet, base,
+ implicitFlowTupleSet, false);
}
// checkCallerArgumentLocationConstraints(md, nametable, min,
// baseLocation, constraint);
- if (min.getMethod().getReturnType()!=null && !min.getMethod().getReturnType().isVoid()) {
+ if (min.getMethod().getReturnType() != null && !min.getMethod().getReturnType().isVoid()) {
// If method has a return value, compute the highest possible return
// location in the caller's perspective
// CompositeLocation ceilingLoc =
}
- 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,
if (min.numArgs() > 0) {
- int offset = min.getMethod().isStatic() ? 0 : 1;
+ int offset;
+ if (min.getMethod().isStatic()) {
+ offset = 0;
+ } else {
+ offset = 1;
+ NTuple<Descriptor> thisArgTuple = new NTuple<Descriptor>();
+ thisArgTuple.add(callermd.getThis());
+ 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,
default:
throw new Error(op.toString());
}
+
}
private NTuple<Descriptor> analyzeFlowNameNode(MethodDescriptor md, SymbolTable nametable,
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
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;
+ } else {
- if (!left.getType().isPrimitive()) {
+ if (!left.getType().isPrimitive()) {
+
+ if (!fd.getSymbol().equals("length")) {
+ // array.length access, just have the location of the array
+ 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;
+ }
}
}
private void analyzeFlowAssignmentNode(MethodDescriptor md, SymbolTable nametable,
- AssignmentNode an, NTuple<Descriptor> base, NodeTupleSet implicitFlowTupleSet) {
+ AssignmentNode an, NodeTupleSet nodeSet, NTuple<Descriptor> base,
+ NodeTupleSet implicitFlowTupleSet) {
NodeTupleSet nodeSetRHS = new NodeTupleSet();
NodeTupleSet nodeSetLHS = new NodeTupleSet();
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();) {
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);
+ }
+ }
+
}
+ if (nodeSet != null) {
+ nodeSet.addTupleSet(nodeSetLHS);
+ }
}
public FlowGraph getFlowGraph(MethodDescriptor md) {
}
}
+
+class CyclicFlowException extends Exception {
+
+}
projects / IRC.git / blobdiff