package Analysis.SSJava;
+import java.io.BufferedReader;
+import java.io.BufferedWriter;
+import java.io.FileReader;
+import java.io.FileWriter;
import java.io.IOException;
import java.util.ArrayList;
-import java.util.Collection;
import java.util.Collections;
import java.util.Comparator;
import java.util.HashMap;
import java.util.Map;
import java.util.Set;
import java.util.Stack;
+import java.util.Vector;
import IR.ClassDescriptor;
import IR.Descriptor;
import IR.Tree.SwitchStatementNode;
import IR.Tree.TertiaryNode;
import IR.Tree.TreeNode;
+import Util.Pair;
public class LocationInference {
private Map<MethodDescriptor, Set<MethodDescriptor>> mapMethodToCalleeSet;
+ private Map<String, Vector<String>> mapFileNameToLineVector;
+
+ private Map<Descriptor, Integer> mapDescToDefinitionLine;
+
public static final String GLOBALLOC = "GLOBALLOC";
public static final String TOPLOC = "TOPLOC";
public static final Descriptor TOPDESC = new NameDescriptor(TOPLOC);
+ public static String newline = System.getProperty("line.separator");
+
+ LocationInfo curMethodInfo;
+
boolean debug = true;
public LocationInference(SSJavaAnalysis ssjava, State state) {
this.mapMethodDescToMethodLocationInfo = new HashMap<MethodDescriptor, MethodLocationInfo>();
this.mapMethodToCalleeSet = new HashMap<MethodDescriptor, Set<MethodDescriptor>>();
this.mapClassToLocationInfo = new HashMap<ClassDescriptor, LocationInfo>();
+
+ this.mapFileNameToLineVector = new HashMap<String, Vector<String>>();
+ this.mapDescToDefinitionLine = new HashMap<Descriptor, Integer>();
}
public void setupToAnalyze() {
// 3) check properties
checkLattices();
+ // 4) generate annotated source codes
+ generateAnnoatedCode();
+
+ }
+
+ private void addMapClassDefinitionToLineNum(ClassDescriptor cd, String strLine, int lineNum) {
+
+ String classSymbol = cd.getSymbol();
+ int idx = classSymbol.lastIndexOf("$");
+ if (idx != -1) {
+ classSymbol = classSymbol.substring(idx + 1);
+ }
+
+ String pattern = "class " + classSymbol + " ";
+ if (strLine.indexOf(pattern) != -1) {
+ mapDescToDefinitionLine.put(cd, lineNum);
+ }
+ }
+
+ private void addMapMethodDefinitionToLineNum(Set<MethodDescriptor> methodSet, String strLine,
+ int lineNum) {
+ for (Iterator iterator = methodSet.iterator(); iterator.hasNext();) {
+ MethodDescriptor md = (MethodDescriptor) iterator.next();
+ String pattern = md.getMethodDeclaration();
+ if (strLine.indexOf(pattern) != -1) {
+ mapDescToDefinitionLine.put(md, lineNum);
+ methodSet.remove(md);
+ return;
+ }
+ }
+
+ }
+
+ private void readOriginalSourceFiles() {
+
+ SymbolTable classtable = state.getClassSymbolTable();
+
+ Set<ClassDescriptor> classDescSet = new HashSet<ClassDescriptor>();
+ classDescSet.addAll(classtable.getValueSet());
+
+ try {
+ // inefficient implement. it may re-visit the same file if the file
+ // contains more than one class definitions.
+ for (Iterator iterator = classDescSet.iterator(); iterator.hasNext();) {
+ ClassDescriptor cd = (ClassDescriptor) iterator.next();
+
+ Set<MethodDescriptor> methodSet = new HashSet<MethodDescriptor>();
+ methodSet.addAll(cd.getMethodTable().getValueSet());
+
+ String sourceFileName = cd.getSourceFileName();
+ Vector<String> lineVec = new Vector<String>();
+
+ mapFileNameToLineVector.put(sourceFileName, lineVec);
+
+ BufferedReader in = new BufferedReader(new FileReader(sourceFileName));
+ String strLine;
+ int lineNum = 1;
+ lineVec.add(""); // the index is started from 1.
+ while ((strLine = in.readLine()) != null) {
+ lineVec.add(lineNum, strLine);
+ addMapClassDefinitionToLineNum(cd, strLine, lineNum);
+ addMapMethodDefinitionToLineNum(methodSet, strLine, lineNum);
+ lineNum++;
+ }
+
+ }
+
+ } catch (IOException e) {
+ e.printStackTrace();
+ }
+
+ }
+
+ private String generateLatticeDefinition(Descriptor desc) {
+
+ Set<String> sharedLocSet = new HashSet<String>();
+
+ SSJavaLattice<String> lattice = getLattice(desc);
+ String rtr = "@LATTICE(\"";
+
+ Map<String, Set<String>> map = lattice.getTable();
+ Set<String> keySet = map.keySet();
+ boolean first = true;
+ for (Iterator iterator = keySet.iterator(); iterator.hasNext();) {
+ String key = (String) iterator.next();
+ if (!key.equals(lattice.getTopItem())) {
+ Set<String> connectedSet = map.get(key);
+
+ if (connectedSet.size() == 1) {
+ if (connectedSet.iterator().next().equals(lattice.getBottomItem())) {
+ if (!first) {
+ rtr += ",";
+ } else {
+ rtr += "LOC,";
+ first = false;
+ }
+ rtr += key;
+ if (lattice.isSharedLoc(key)) {
+ rtr += "," + key + "*";
+ }
+ }
+ }
+
+ for (Iterator iterator2 = connectedSet.iterator(); iterator2.hasNext();) {
+ String loc = (String) iterator2.next();
+ if (!loc.equals(lattice.getBottomItem())) {
+ if (!first) {
+ rtr += ",";
+ } else {
+ rtr += "LOC,";
+ first = false;
+ }
+ rtr += loc + "<" + key;
+ if (lattice.isSharedLoc(key) && (!sharedLocSet.contains(key))) {
+ rtr += "," + key + "*";
+ sharedLocSet.add(key);
+ }
+ if (lattice.isSharedLoc(loc) && (!sharedLocSet.contains(loc))) {
+ rtr += "," + loc + "*";
+ sharedLocSet.add(loc);
+ }
+
+ }
+ }
+ }
+ }
+
+ rtr += "\")";
+
+ if (desc instanceof MethodDescriptor) {
+ TypeDescriptor returnType = ((MethodDescriptor) desc).getReturnType();
+ if (returnType != null && (!returnType.isVoid())) {
+ rtr += "\n@RETURNLOC(\"RETURNLOC\")";
+ }
+ rtr += "\n@THISLOC(\"this\")\n@PCLOC(\"PCLOC\")\n@GLOBALLOC(\"GLOBALLOC\")";
+
+ }
+
+ return rtr;
+ }
+
+ private void generateAnnoatedCode() {
+
+ readOriginalSourceFiles();
+
+ setupToAnalyze();
+ while (!toAnalyzeIsEmpty()) {
+ ClassDescriptor cd = toAnalyzeNext();
+
+ setupToAnalazeMethod(cd);
+
+ LocationInfo locInfo = mapClassToLocationInfo.get(cd);
+ String sourceFileName = cd.getSourceFileName();
+
+ if (cd.isInterface()) {
+ continue;
+ }
+
+ int classDefLine = mapDescToDefinitionLine.get(cd);
+ Vector<String> sourceVec = mapFileNameToLineVector.get(sourceFileName);
+
+ if (locInfo == null) {
+ locInfo = getLocationInfo(cd);
+ }
+
+ for (Iterator iter = cd.getFields(); iter.hasNext();) {
+ Descriptor fieldDesc = (Descriptor) iter.next();
+ String locIdentifier = locInfo.getFieldInferLocation(fieldDesc).getLocIdentifier();
+ if (!getLattice(cd).containsKey(locIdentifier)) {
+ getLattice(cd).put(locIdentifier);
+ }
+ }
+
+ String fieldLatticeDefStr = generateLatticeDefinition(cd);
+ String annoatedSrc = fieldLatticeDefStr + newline + sourceVec.get(classDefLine);
+ sourceVec.set(classDefLine, annoatedSrc);
+
+ // generate annotations for field declarations
+ LocationInfo fieldLocInfo = getLocationInfo(cd);
+ Map<Descriptor, CompositeLocation> inferLocMap = fieldLocInfo.getMapDescToInferLocation();
+
+ for (Iterator iter = cd.getFields(); iter.hasNext();) {
+ FieldDescriptor fd = (FieldDescriptor) iter.next();
+
+ String locAnnotationStr;
+ if (inferLocMap.containsKey(fd)) {
+ CompositeLocation inferLoc = inferLocMap.get(fd);
+ locAnnotationStr = generateLocationAnnoatation(inferLoc);
+ } else {
+ // if the field is not accssed by SS part, just assigns dummy
+ // location
+ locAnnotationStr = "@LOC(\"LOC\")";
+ }
+ int fdLineNum = fd.getLineNum();
+ String orgFieldDeclarationStr = sourceVec.get(fdLineNum);
+ String fieldDeclaration = fd.toString();
+ fieldDeclaration = fieldDeclaration.substring(0, fieldDeclaration.length() - 1);
+
+ String annoatedStr = locAnnotationStr + " " + orgFieldDeclarationStr;
+ sourceVec.set(fdLineNum, annoatedStr);
+
+ }
+
+ while (!toAnalyzeMethodIsEmpty()) {
+ MethodDescriptor md = toAnalyzeMethodNext();
+ SSJavaLattice<String> methodLattice = md2lattice.get(md);
+ if (methodLattice != null) {
+
+ int methodDefLine = md.getLineNum();
+
+ MethodLocationInfo methodLocInfo = getMethodLocationInfo(md);
+
+ Map<Descriptor, CompositeLocation> methodInferLocMap =
+ methodLocInfo.getMapDescToInferLocation();
+ Set<Descriptor> localVarDescSet = methodInferLocMap.keySet();
+
+ for (Iterator iterator = localVarDescSet.iterator(); iterator.hasNext();) {
+ Descriptor localVarDesc = (Descriptor) iterator.next();
+ CompositeLocation inferLoc = methodInferLocMap.get(localVarDesc);
+
+ String locAnnotationStr = generateLocationAnnoatation(inferLoc);
+
+ if (!isParameter(md, localVarDesc)) {
+ if (mapDescToDefinitionLine.containsKey(localVarDesc)) {
+ int varLineNum = mapDescToDefinitionLine.get(localVarDesc);
+ String orgSourceLine = sourceVec.get(varLineNum);
+ int idx =
+ orgSourceLine.indexOf(generateVarDeclaration((VarDescriptor) localVarDesc));
+ assert (idx != -1);
+ String annoatedStr =
+ orgSourceLine.substring(0, idx) + locAnnotationStr + " "
+ + orgSourceLine.substring(idx);
+ sourceVec.set(varLineNum, annoatedStr);
+ }
+ } else {
+ String methodDefStr = sourceVec.get(methodDefLine);
+ int idx = methodDefStr.indexOf(generateVarDeclaration((VarDescriptor) localVarDesc));
+ assert (idx != -1);
+ String annoatedStr =
+ methodDefStr.substring(0, idx) + locAnnotationStr + " "
+ + methodDefStr.substring(idx);
+ sourceVec.set(methodDefLine, annoatedStr);
+ }
+
+ }
+
+ String methodLatticeDefStr = generateLatticeDefinition(md);
+ String annoatedStr = methodLatticeDefStr + newline + sourceVec.get(methodDefLine);
+ sourceVec.set(methodDefLine, annoatedStr);
+
+ }
+ }
+
+ }
+
+ codeGen();
+ }
+
+ private String generateVarDeclaration(VarDescriptor varDesc) {
+
+ TypeDescriptor td = varDesc.getType();
+ String rtr = td.toString();
+ if (td.isArray()) {
+ for (int i = 0; i < td.getArrayCount(); i++) {
+ rtr += "[]";
+ }
+ }
+ rtr += " " + varDesc.getName();
+ return rtr;
+
+ }
+
+ private String generateLocationAnnoatation(CompositeLocation loc) {
+ String rtr = "@LOC(\"";
+
+ // method location
+ Location methodLoc = loc.get(0);
+ rtr += methodLoc.getLocIdentifier();
+
+ for (int i = 1; i < loc.getSize(); i++) {
+ Location element = loc.get(i);
+ rtr += "," + element.getDescriptor().getSymbol() + "." + element.getLocIdentifier();
+ }
+
+ rtr += "\")";
+ return rtr;
+ }
+
+ private boolean isParameter(MethodDescriptor md, Descriptor localVarDesc) {
+ return getFlowGraph(md).isParamDesc(localVarDesc);
+ }
+
+ private String extractFileName(String fileName) {
+ int idx = fileName.lastIndexOf("/");
+ if (idx == -1) {
+ return fileName;
+ } else {
+ return fileName.substring(idx + 1);
+ }
+
+ }
+
+ private void codeGen() {
+
+ Set<String> originalFileNameSet = mapFileNameToLineVector.keySet();
+ for (Iterator iterator = originalFileNameSet.iterator(); iterator.hasNext();) {
+ String orgFileName = (String) iterator.next();
+ String outputFileName = extractFileName(orgFileName);
+
+ Vector<String> sourceVec = mapFileNameToLineVector.get(orgFileName);
+
+ try {
+
+ FileWriter fileWriter = new FileWriter("./infer/" + outputFileName);
+ BufferedWriter out = new BufferedWriter(fileWriter);
+
+ for (int i = 0; i < sourceVec.size(); i++) {
+ out.write(sourceVec.get(i));
+ out.newLine();
+ }
+ out.close();
+ } catch (IOException e) {
+ e.printStackTrace();
+ }
+
+ }
+
}
private void simplifyLattices() {
while (!toAnalyzeMethodIsEmpty()) {
MethodDescriptor md = toAnalyzeMethodNext();
- if (ssjava.needTobeAnnotated(md)) {
- SSJavaLattice<String> methodLattice = md2lattice.get(md);
- if (methodLattice != null) {
- methodLattice.removeRedundantEdges();
- }
+ SSJavaLattice<String> methodLattice = md2lattice.get(md);
+ if (methodLattice != null) {
+ methodLattice.removeRedundantEdges();
}
}
}
while (!toAnalyzeMethodIsEmpty()) {
MethodDescriptor md = toAnalyzeMethodNext();
- if (ssjava.needTobeAnnotated(md)) {
- SSJavaLattice<String> methodLattice = md2lattice.get(md);
- if (methodLattice != null) {
- ssjava.writeLatticeDotFile(cd, md, methodLattice);
- debug_printDescriptorToLocNameMapping(md);
- }
+ SSJavaLattice<String> methodLattice = md2lattice.get(md);
+ if (methodLattice != null) {
+ ssjava.writeLatticeDotFile(cd, md, methodLattice);
+ debug_printDescriptorToLocNameMapping(md);
}
}
}
// 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);
// 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);
-
- } else if (srcNodeTuple.size() == 1 || dstNodeTuple.size() == 1) {
- // for the method lattice, we need to look at the first element of
- // NTuple<Descriptor>
- // in this case, take a look at connected nodes at the local level
- addRelationToLattice(md, methodLattice, methodInfo, srcNode, dstNode);
- } else {
+ Descriptor desc = srcNodeTuple.get(0);
+ ClassDescriptor classDesc;
- if (!srcNode.getDescTuple().get(0).equals(dstNode.getDescTuple().get(0))) {
- // in this case, take a look at connected nodes at the local level
- addRelationToLattice(md, methodLattice, methodInfo, srcNode, dstNode);
+ if (desc.equals(GLOBALDESC)) {
+ classDesc = md.getClassDesc();
} else {
- Descriptor srcDesc = srcNode.getDescTuple().get(0);
- Descriptor dstDesc = dstNode.getDescTuple().get(0);
- recursivelyAddCompositeRelation(md, fg, methodInfo, srcNode, dstNode, srcDesc,
- dstDesc);
- // recursiveAddRelationToLattice(1, md, srcNode, dstNode);
+ 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);
}
+ // else if (srcNodeTuple.size() == 1 || dstNodeTuple.size() == 1) {
+ // // for the method lattice, we need to look at the first element of
+ // // NTuple<Descriptor>
+ // // in this case, take a look at connected nodes at the local level
+ // addRelationToLattice(md, methodLattice, methodInfo, srcNode,
+ // dstNode);
+ // } else {
+ // if
+ // (!srcNode.getDescTuple().get(0).equals(dstNode.getDescTuple().get(0)))
+ // {
+ // // in this case, take a look at connected nodes at the local level
+ // addRelationToLattice(md, methodLattice, methodInfo, srcNode,
+ // dstNode);
+ // } else {
+ // Descriptor srcDesc = srcNode.getDescTuple().get(0);
+ // Descriptor dstDesc = dstNode.getDescTuple().get(0);
+ // recursivelyAddCompositeRelation(md, fg, methodInfo, srcNode,
+ // dstNode, srcDesc,
+ // dstDesc);
+ // // recursiveAddRelationToLattice(1, md, srcNode, dstNode);
+ // }
+ // }
+
}
}
}
+ for (Iterator iterator = nodeSet.iterator(); iterator.hasNext();) {
+ FlowNode flowNode = (FlowNode) iterator.next();
+ if (flowNode.isDeclaratonNode()) {
+ CompositeLocation inferLoc = methodInfo.getInferLocation(flowNode.getDescTuple().get(0));
+ String locIdentifier = inferLoc.get(0).getLocIdentifier();
+ if (!methodLattice.containsKey(locIdentifier)) {
+ methodLattice.put(locIdentifier);
+ }
+
+ }
+ }
+
// create mapping from param idx to inferred composite location
int offset;
// 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);
- addRelation(methodLattice, methodInfo, inferLoc1, inferLoc2);
+ addFlowGraphEdge(mdCaller, argDescTuple1, argDescTuple2);
}
}
- private CompositeLocation calcualteInferredCompositeLocation(MethodLocationInfo methodInfo,
+ private CompositeLocation generateInferredCompositeLocation(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());
+
+ 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);
}
+ assert (inferLoc.get(0).getLocDescriptor().getSymbol() == inferLoc.get(0).getLocIdentifier());
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();
}
}
+ 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);
-
- calculateCompositeLocation(flowGraph, methodLattice, methodInfo, srcNode);
-
- CompositeLocation srcInferLoc =
- calcualteInferredCompositeLocation(methodInfo, flowGraph.getLocationTuple(srcNode));
- CompositeLocation dstInferLoc =
- calcualteInferredCompositeLocation(methodInfo, flowGraph.getLocationTuple(dstNode));
-
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);
- 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)) {
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.getReachableFlowNodeSet(flowNode);
Map<NTuple<Location>, Set<NTuple<Location>>> mapPrefixToIncomingLocTupleSet =
new HashMap<NTuple<Location>, Set<NTuple<Location>>>();
- 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();) {
FlowNode inNode = (FlowNode) iterator.next();
- NTuple<Location> inTuple = flowGraph.getLocationTuple(inNode);
+ NTuple<Location> inNodeTuple = flowGraph.getLocationTuple(inNode);
- if (inTuple.size() > 1) {
- for (int i = 1; i < inTuple.size(); i++) {
- NTuple<Location> prefix = inTuple.subList(0, i);
- if (!prefixList.contains(prefix)) {
- prefixList.add(prefix);
- }
- addPrefixMapping(mapPrefixToIncomingLocTupleSet, prefix, inTuple);
+ 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);
}
- } else {
- localInNodeSet.add(inNode);
+ addPrefixMapping(mapPrefixToIncomingLocTupleSet, prefix, inNodeInferredLocTuple);
}
}
}
});
- for (Iterator iterator2 = reachableNodeSet.iterator(); iterator2.hasNext();) {
- FlowNode reachableNode = (FlowNode) iterator2.next();
- if (reachableNode.getDescTuple().size() == 1) {
- localOutNodeSet.add(reachableNode);
- }
- }
-
// find out reachable nodes that have the longest common prefix
for (int i = 0; i < prefixList.size(); i++) {
NTuple<Location> curPrefix = prefixList.get(i);
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);
- if (isGreaterThan(methodLattice, flowNodeInferLoc, prefixInferLoc)) {
- reachableCommonPrefixSet.add(curPrefix);
- }
-
if (!reachableCommonPrefixSet.isEmpty()) {
// found reachable nodes that start with the prefix curPrefix
// need to assign a composite location
SSJavaLattice<String> lattice = getLattice(desc);
LocationInfo locInfo = getLocationInfo(desc);
- // CompositeLocation inferLocation =
- // methodInfo.getInferLocation(flowNode);
- CompositeLocation inferLocation = methodInfo.getInferLocation(localVarDesc);
+ CompositeLocation inferLocation =
+ generateInferredCompositeLocation(methodInfo, flowNodelocTuple);
- String newlyInsertedLocName;
- if (inferLocation.getSize() == 1) {
- // need to replace the old local location with a new composite
- // location
+ // methodInfo.getInferLocation(localVarDesc);
+ CompositeLocation newInferLocation = new CompositeLocation();
- 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);
-
- methodInfo.mapDescriptorToLocation(localVarDesc, inferLocation);
- methodInfo.removeMaplocalVarToLocSet(localVarDesc);
-
- String newMethodLocationSymbol = curPrefix.get(0).getLocIdentifier();
+ Location newLocationElement = new Location(desc, newLocSymbol);
+ newInferLocation.addLocation(newLocationElement);
- replaceOldLocWithNewLoc(methodLattice, oldMethodLocationSymbol, newMethodLocationSymbol);
+ // 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 lastIdx = flowNode.getDescTuple().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);
+ // }
}
- 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();
-
Location loc = tuple.get(idx);
- String higher = locInfo.getFieldInferLocation(loc.getLocDescriptor()).getLocIdentifier();
- System.out.println("--");
- System.out.println("add in-flow relation:");
+ String higher = loc.getLocIdentifier();
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();
-
- if (localNode.equals(flowNode)) {
- continue;
- }
-
- Descriptor localInVarDesc = localNode.getDescTuple().get(0);
- CompositeLocation inNodeInferLoc = methodInfo.getInferLocation(localInVarDesc);
-
- 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("-- 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 = locInfo.getFieldInferLocation(loc.getLocDescriptor()).getLocIdentifier();
- // lattice.addRelationHigherToLower(newlyInsertedLocName, lower);
- System.out.println("add out-flow relation:");
+ String lower = loc.getLocIdentifier();
+ // String lower =
+ // locInfo.getFieldInferLocation(loc.getLocDescriptor()).getLocIdentifier();
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);
- CompositeLocation outNodeInferLoc = methodInfo.getInferLocation(localOutDesc);
-
- if (isCompositeLocation(outNodeInferLoc)) {
- // need to make sure that newLocSymbol is higher than the infernode
- // location
-
- 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.");
- }
- }
- }
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) 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 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);
DeclarationNode dn, NodeTupleSet implicitFlowTupleSet) {
VarDescriptor vd = dn.getVarDescriptor();
+ mapDescToDefinitionLine.put(vd, dn.getNumLine());
NTuple<Descriptor> tupleLHS = new NTuple<Descriptor>();
tupleLHS.add(vd);
- getFlowGraph(md).createNewFlowNode(tupleLHS);
+ FlowNode fn = getFlowGraph(md).createNewFlowNode(tupleLHS);
+ fn.setDeclarationNode();
if (dn.getExpression() != null) {
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);
+ implicitFlowTupleSet, isLHS);
if (flowTuple != null) {
nodeSet.addTuple(flowTuple);
}
private void analyzeFlowMethodParameters(MethodDescriptor callermd, SymbolTable nametable,
MethodInvokeNode min) {
-
if (min.numArgs() > 0) {
int offset;
if (isLHS) {
// need to create an edge from idx to array
-
for (Iterator<NTuple<Descriptor>> idxIter = idxNodeTupleSet.iterator(); idxIter.hasNext();) {
NTuple<Descriptor> idxTuple = idxIter.next();
for (Iterator<NTuple<Descriptor>> arrIter = expNodeTupleSet.iterator(); arrIter.hasNext();) {
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;
}
}
+ NodeTupleSet idxNodeTupleSet = new NodeTupleSet();
if (left instanceof ArrayAccessNode) {
+
ArrayAccessNode aan = (ArrayAccessNode) left;
left = aan.getExpression();
+ analyzeFlowExpressionNode(md, nametable, aan.getIndex(), idxNodeTupleSet, base,
+ implicitFlowTupleSet, isLHS);
+ nodeSet.addTupleSet(idxNodeTupleSet);
}
- // 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 {
+ NTuple<Descriptor> flowFieldTuple = new NTuple<Descriptor>(base.toList());
+
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);
+ flowFieldTuple.add(fd);
+ nodeSet.removeTuple(base);
}
}
+ getFlowGraph(md).createNewFlowNode(flowFieldTuple);
+
+ if (isLHS) {
+ for (Iterator<NTuple<Descriptor>> idxIter = idxNodeTupleSet.iterator(); idxIter.hasNext();) {
+ NTuple<Descriptor> idxTuple = idxIter.next();
+ getFlowGraph(md).addValueFlowEdge(idxTuple, flowFieldTuple);
+ }
+ }
- getFlowGraph(md).createNewFlowNode(base);
- return base;
+ return flowFieldTuple;
}
}
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();
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) {
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