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 {
// 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<MethodDescriptor, Set<MethodDescriptor>> mapMethodToCalleeSet;
+ private Map<MethodDescriptor, Set<FlowNode>> mapMethodDescToParamNodeFlowsToReturnValue;
+
+ 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.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>();
+
+ this.mapFileNameToLineVector = new HashMap<String, Vector<String>>();
+ this.mapDescToDefinitionLine = new HashMap<Descriptor, Integer>();
+ this.mapMethodDescToParamNodeFlowsToReturnValue =
+ new HashMap<MethodDescriptor, Set<FlowNode>>();
}
public void setupToAnalyze() {
SymbolTable classtable = state.getClassSymbolTable();
toanalyzeList.clear();
toanalyzeList.addAll(classtable.getValueSet());
- Collections.sort(toanalyzeList, new Comparator<ClassDescriptor>() {
- public int compare(ClassDescriptor o1, ClassDescriptor o2) {
- return o1.getClassName().compareToIgnoreCase(o2.getClassName());
- }
- });
+ // Collections.sort(toanalyzeList, new Comparator<ClassDescriptor>() {
+ // public int compare(ClassDescriptor o1, ClassDescriptor o2) {
+ // return o1.getClassName().compareToIgnoreCase(o2.getClassName());
+ // }
+ // });
}
public void setupToAnalazeMethod(ClassDescriptor cd) {
// 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();
+
+ MethodLocationInfo methodLocInfo = getMethodLocationInfo((MethodDescriptor) desc);
+
+ if (returnType != null && (!returnType.isVoid())) {
+ rtr +=
+ "\n@RETURNLOC(\"" + generateLocationAnnoatation(methodLocInfo.getReturnLoc()) + "\")";
+ }
+ rtr += "\n@THISLOC(\"this\")\n@GLOBALLOC(\"GLOBALLOC\")";
+
+ if (lattice.containsKey("PCLOC")) {
+ rtr += "\n@PCLOC(\"PCLOC\")";
+ }
+ }
+
+ 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 = "@LOC(\"" + 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 = "@LOC(\"" + 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 =
+ getParamLocation(methodDefStr,
+ generateVarDeclaration((VarDescriptor) localVarDesc));
+
+ System.out.println("#methodDefStr=" + methodDefStr + " localVar="
+ + generateVarDeclaration((VarDescriptor) localVarDesc) + " idx=" + idx);
+
+ 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 int getParamLocation(String methodStr, String paramStr) {
+
+ String pattern = paramStr + ",";
+
+ int idx = methodStr.indexOf(pattern);
+ if (idx != -1) {
+ return idx;
+ } else {
+ pattern = paramStr + ")";
+ return methodStr.indexOf(pattern);
+ }
+
+ }
+
+ 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 = "";
+ // 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();
+ }
+
+ 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);
- 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
// 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;
methodInfo.addMapParamIdxToInferLoc(idx + offset, inferParamLoc);
}
- // calculate the initial program counter location
- // PC location is higher than location types of all parameters
- String pcLocSymbol = "PCLOC";
Map<Integer, CompositeLocation> mapParamToLoc = methodInfo.getMapParamIdxToInferLoc();
Set<Integer> keySet = mapParamToLoc.keySet();
- 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(pcLocSymbol, paramLocLocalSymbol)) {
- addRelationHigherToLower(methodLattice, methodInfo, pcLocSymbol, paramLocLocalSymbol);
+
+ if (!ssjava.getMethodContainingSSJavaLoop().equals(md)) {
+ // calculate the initial program counter location
+ // PC location is higher than location types of all parameters
+ String pcLocSymbol = "PCLOC";
+ for (Iterator iterator = keySet.iterator(); iterator.hasNext();) {
+ Integer paramIdx = (Integer) iterator.next();
+ CompositeLocation inferLoc = mapParamToLoc.get(paramIdx);
+ String paramLocLocalSymbol = inferLoc.get(0).getLocIdentifier();
+ if (!methodLattice.isGreaterThan(pcLocSymbol, paramLocLocalSymbol)) {
+ addRelationHigherToLower(methodLattice, methodInfo, pcLocSymbol, paramLocLocalSymbol);
+
+ Set<String> higherLocSet = getHigherLocSymbolThan(methodLattice, paramLocLocalSymbol);
+ higherLocSet.remove(pcLocSymbol);
+ for (Iterator iterator2 = higherLocSet.iterator(); iterator2.hasNext();) {
+ String loc = (String) iterator2.next();
+ addRelationHigherToLower(methodLattice, methodInfo, pcLocSymbol, loc);
+ }
+ }
}
}
// calculate a return location
- // the return location type is lower than all parameters
+ // the return location type is lower than all parameters and location types
+ // of return values
if (!md.getReturnType().isVoid()) {
- String returnLocSymbol = "RETURNLOC";
+ // first, generate the set of return value location types that starts with
+ // 'this' reference
- 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);
+ Set<CompositeLocation> inferFieldReturnLocSet = new HashSet<CompositeLocation>();
+
+ Set<FlowNode> paramFlowNode = getParamNodeFlowingToReturnValue(md);
+ Set<CompositeLocation> inferParamLocSet = new HashSet<CompositeLocation>();
+ if (paramFlowNode != null) {
+ for (Iterator iterator = paramFlowNode.iterator(); iterator.hasNext();) {
+ FlowNode fn = (FlowNode) iterator.next();
+ CompositeLocation inferLoc =
+ generateInferredCompositeLocation(methodInfo, getFlowGraph(md).getLocationTuple(fn));
+ inferParamLocSet.add(inferLoc);
}
}
- }
- }
+ Set<FlowNode> returnNodeSet = fg.getReturnNodeSet();
+ skip: for (Iterator iterator = returnNodeSet.iterator(); iterator.hasNext();) {
+ FlowNode returnNode = (FlowNode) iterator.next();
+ CompositeLocation inferReturnLoc =
+ generateInferredCompositeLocation(methodInfo, fg.getLocationTuple(returnNode));
+ System.out.println("@inferReturnLoc=" + inferReturnLoc);
+ if (inferReturnLoc.get(0).getLocIdentifier().equals("this")) {
+ // if the location type of the return value matches "this" reference
+ // then, check whether this return value is equal to/lower than all of
+ // parameters that possibly flow into the return values
+ for (Iterator iterator2 = inferParamLocSet.iterator(); iterator2.hasNext();) {
+ CompositeLocation paramInferLoc = (CompositeLocation) iterator2.next();
+
+ if ((!paramInferLoc.equals(inferReturnLoc))
+ && !isGreaterThan(methodLattice, paramInferLoc, inferReturnLoc)) {
+ continue skip;
+ }
+ }
+ inferFieldReturnLocSet.add(inferReturnLoc);
+
+ }
+ }
+
+ if (inferFieldReturnLocSet.size() > 0) {
- private CompositeLocation getHighestLocation(Collection<CompositeLocation> locSet) {
+ CompositeLocation returnLoc = getLowest(methodLattice, inferFieldReturnLocSet);
+ methodInfo.setReturnLoc(returnLoc);
- Iterator<CompositeLocation> locIter = locSet.iterator();
+ } else {
+ String returnLocSymbol = "RETURNLOC";
+ CompositeLocation returnLocInferLoc =
+ new CompositeLocation(new Location(md, returnLocSymbol));
+ methodInfo.setReturnLoc(returnLocInferLoc);
+
+ 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);
+ }
+ }
- CompositeLocation highest = locIter.next();
+ for (Iterator iterator = returnNodeSet.iterator(); iterator.hasNext();) {
+ FlowNode returnNode = (FlowNode) iterator.next();
+ CompositeLocation inferLoc =
+ generateInferredCompositeLocation(methodInfo, fg.getLocationTuple(returnNode));
+ if (!isGreaterThan(methodLattice, inferLoc, returnLocInferLoc)) {
+ addRelation(methodLattice, methodInfo, inferLoc, returnLocInferLoc);
+ }
+ }
- for (; locIter.hasNext();) {
- CompositeLocation loc = (CompositeLocation) locIter.next();
- if (isGreaterThan(loc, highest)) {
- highest = loc;
}
+
}
- return highest;
+ }
+
+ private Set<String> getHigherLocSymbolThan(SSJavaLattice<String> lattice, String loc) {
+ Set<String> higherLocSet = new HashSet<String>();
+
+ Set<String> locSet = lattice.getTable().keySet();
+ for (Iterator iterator = locSet.iterator(); iterator.hasNext();) {
+ String element = (String) iterator.next();
+ if (lattice.isGreaterThan(element, loc) && (!element.equals(lattice.getTopItem()))) {
+ higherLocSet.add(element);
+ }
+ }
+ return higherLocSet;
+ }
+
+ private CompositeLocation getLowest(SSJavaLattice<String> methodLattice,
+ Set<CompositeLocation> set) {
+ CompositeLocation lowest = set.iterator().next();
+
+ if (set.size() == 1) {
+ return lowest;
+ }
+
+ for (Iterator iterator = set.iterator(); iterator.hasNext();) {
+ CompositeLocation loc = (CompositeLocation) iterator.next();
+ if (isGreaterThan(methodLattice, lowest, loc)) {
+ lowest = loc;
+ }
+ }
+ return lowest;
}
- private boolean isGreaterThan(CompositeLocation comp1, CompositeLocation comp2) {
+ private boolean isGreaterThan(SSJavaLattice<String> methodLattice, 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 = generateInferredCompositeLocation(methodInfo, tuple1);
+ CompositeLocation inferLoc2 = generateInferredCompositeLocation(methodInfo, tuple2);
+
+ // addRelation(methodLattice, methodInfo, inferLoc1, inferLoc2);
+
+ addFlowGraphEdge(mdCaller, argDescTuple1, argDescTuple2);
+
+ }
+
+ }
+
}
}
}
}
- private LocationInfo getLocationInfo(Descriptor d) {
+ 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));
+ }
+
+ 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);
+
+ }
+
+ 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();
+
+ if (srcInferLoc.getSize() == 1 && dstInferLoc.getSize() == 1) {
+ // add a new relation to the local lattice
+ addRelationHigherToLower(methodLattice, methodInfo, srcLocalLocSymbol, dstLocalLocSymbol);
+ } else if (srcInferLoc.getSize() > 1 && dstInferLoc.getSize() > 1) {
+ // both src and dst have assigned to a composite location
+
+ if (!srcLocalLocSymbol.equals(dstLocalLocSymbol)) {
+ addRelationHigherToLower(methodLattice, methodInfo, srcLocalLocSymbol, dstLocalLocSymbol);
+ } else {
+ recursivelyAddRelation(1, srcInferLoc, dstInferLoc);
+ }
+ } else {
+ // either src or dst has assigned to a composite location
+ if (!srcLocalLocSymbol.equals(dstLocalLocSymbol)) {
+ addRelationHigherToLower(methodLattice, methodInfo, srcLocalLocSymbol, dstLocalLocSymbol);
+ }
+ }
+
+ System.out.println();
+
+ }
+
+ public LocationInfo getLocationInfo(Descriptor d) {
if (d instanceof MethodDescriptor) {
return getMethodLocationInfo((MethodDescriptor) d);
} 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, 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);
+ 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);
+ 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>();
-
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);
- }
- }
+ System.out.println("prefixList=" + prefixList);
+ System.out.println("reachableNodeSet=" + reachableNodeSet);
// find out reachable nodes that have the longest common prefix
for (int i = 0; i < prefixList.size(); i++) {
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);
}
-
}
if (!reachableCommonPrefixSet.isEmpty()) {
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
+ System.out.println("NO ATTEMPT TO HAVE A COMPOSITE LOCATION curPrefix=" + curPrefix);
+ 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);
+ Location newLocationElement = new Location(desc, newLocSymbol);
+ newInferLocation.addLocation(newLocationElement);
- methodInfo.mapDescriptorToLocation(localVarDesc, inferLocation);
- methodInfo.removeMaplocalVarToLocSet(localVarDesc);
+ // maps local variable to location types of the common prefix
+ methodInfo.mapDescriptorToLocation(localVarDesc, newInferLocation.clone());
- String newMethodLocationSymbol = curPrefix.get(0).getLocIdentifier();
-
- replaceOldLocWithNewLoc(methodLattice, oldMethodLocationSymbol, newMethodLocationSymbol);
-
- } 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("curPrefix=" + curPrefix);
+ System.out.println("ASSIGN NEW COMPOSITE LOCATION =" + newInferLocation + " to "
+ + flowNode);
+ String newlyInsertedLocName =
+ newInferLocation.get(newInferLocation.getSize() - 1).getLocIdentifier();
+
+ System.out.println("-- add in-flow");
for (Iterator iterator = incomingCommonPrefixSet.iterator(); iterator.hasNext();) {
NTuple<Location> tuple = (NTuple<Location>) iterator.next();
-
Location loc = tuple.get(idx);
- String higher = 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();
- 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();
- 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();
-
- 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
-
- 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.");
- }
+ if (tuple.size() > idx) {
+ Location loc = tuple.get(idx);
+ String lower = loc.getLocIdentifier();
+ // String lower =
+ // locInfo.getFieldInferLocation(loc.getLocDescriptor()).getLocIdentifier();
+ addRelationHigherToLower(lattice, locInfo, newlyInsertedLocName, lower);
}
}
}
+ 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)) {
return cd2lattice.get(cd);
}
- public void constructFlowGraph() {
+ public LinkedList<MethodDescriptor> computeMethodList() {
+
+ Set<MethodDescriptor> toSort = new HashSet<MethodDescriptor>();
setupToAnalyze();
MethodDescriptor md = toAnalyzeMethodNext();
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);
- }
// creates a mapping from a method descriptor to virtual methods
Set<MethodDescriptor> setPossibleCallees = new HashSet<MethodDescriptor>();
mapMethodToCalleeSet.put(md, needToAnalyzeCalleeSet);
- // creates a mapping from a parameter descriptor to its index
- Map<Descriptor, Integer> mapParamDescToIdx = new HashMap<Descriptor, Integer>();
- int offset = md.isStatic() ? 0 : 1;
- for (int i = 0; i < md.numParameters(); i++) {
- Descriptor paramDesc = (Descriptor) md.getParameter(i);
- mapParamDescToIdx.put(paramDesc, new Integer(i + offset));
- }
-
- FlowGraph fg = new FlowGraph(md, mapParamDescToIdx);
- mapMethodDescriptorToFlowGraph.put(md, fg);
-
visited.add(md);
- analyzeMethodBody(cd, md);
+ toSort.add(md);
}
}
}
+ return ssjava.topologicalSort(toSort);
+
+ }
+
+ public void constructFlowGraph() {
+
+ LinkedList<MethodDescriptor> methodDescList = computeMethodList();
+
+ while (!methodDescList.isEmpty()) {
+ MethodDescriptor md = methodDescList.removeLast();
+ if (state.SSJAVADEBUG) {
+ System.out.println();
+ System.out.println("SSJAVA: Constructing a flow graph: " + md);
+
+ // creates a mapping from a parameter descriptor to its index
+ Map<Descriptor, Integer> mapParamDescToIdx = new HashMap<Descriptor, Integer>();
+ int offset = 0;
+ if (!md.isStatic()) {
+ offset = 1;
+ mapParamDescToIdx.put(md.getThis(), 0);
+ }
+
+ for (int i = 0; i < md.numParameters(); i++) {
+ Descriptor paramDesc = (Descriptor) md.getParameter(i);
+ mapParamDescToIdx.put(paramDesc, new Integer(i + offset));
+ }
+
+ FlowGraph fg = new FlowGraph(md, mapParamDescToIdx);
+ mapMethodDescriptorToFlowGraph.put(md, fg);
+
+ analyzeMethodBody(md.getClassDesc(), md);
+ }
+ }
_debug_printGraph();
+
}
private void analyzeMethodBody(ClassDescriptor cd, MethodDescriptor md) {
// annotate the elements of the node set as the return location
for (Iterator iterator = nodeSet.iterator(); iterator.hasNext();) {
NTuple<Descriptor> returnDescTuple = (NTuple<Descriptor>) iterator.next();
- fg.setReturnFlowNode(returnDescTuple);
+ fg.addReturnFlowNode(returnDescTuple);
for (Iterator iterator2 = implicitFlowTupleSet.iterator(); iterator2.hasNext();) {
NTuple<Descriptor> implicitFlowDescTuple = (NTuple<Descriptor>) iterator2.next();
fg.addValueFlowEdge(implicitFlowDescTuple, returnDescTuple);
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);
- 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.MethodInvokeNode:
- analyzeFlowMethodInvokeNode(md, nametable, (MethodInvokeNode) en, implicitFlowTupleSet);
+ analyzeFlowMethodInvokeNode(md, nametable, (MethodInvokeNode) en, nodeSet,
+ implicitFlowTupleSet);
break;
case Kind.TertiaryNode:
set.add(min);
}
+ private void addParamNodeFlowingToReturnValue(MethodDescriptor md, FlowNode fn) {
+
+ if (!mapMethodDescToParamNodeFlowsToReturnValue.containsKey(md)) {
+ mapMethodDescToParamNodeFlowsToReturnValue.put(md, new HashSet<FlowNode>());
+ }
+ mapMethodDescToParamNodeFlowsToReturnValue.get(md).add(fn);
+ }
+
+ private Set<FlowNode> getParamNodeFlowingToReturnValue(MethodDescriptor md) {
+ return mapMethodDescToParamNodeFlowsToReturnValue.get(md);
+ }
+
private void analyzeFlowMethodInvokeNode(MethodDescriptor md, SymbolTable nametable,
- MethodInvokeNode min, NodeTupleSet implicitFlowTupleSet) {
+ MethodInvokeNode min, NodeTupleSet nodeSet, NodeTupleSet implicitFlowTupleSet) {
+
+ System.out.println("analyzeFlowMethodInvokeNode=" + min.printNode(0));
+
+ if (nodeSet == null) {
+ nodeSet = new NodeTupleSet();
+ }
addMapCallerMethodDescToMethodInvokeNodeSet(md, min);
- MethodDescriptor calleeMD = min.getMethod();
+ MethodDescriptor calleeMethodDesc = min.getMethod();
NameDescriptor baseName = min.getBaseName();
boolean isSystemout = false;
isSystemout = baseName.getSymbol().equals("System.out");
}
- if (!ssjava.isSSJavaUtil(calleeMD.getClassDesc()) && !ssjava.isTrustMethod(calleeMD)
- && !calleeMD.getModifiers().isNative() && !isSystemout) {
+ if (!ssjava.isSSJavaUtil(calleeMethodDesc.getClassDesc())
+ && !ssjava.isTrustMethod(calleeMethodDesc) && !calleeMethodDesc.getModifiers().isNative()
+ && !isSystemout) {
+
+ FlowGraph calleeFlowGraph = getFlowGraph(calleeMethodDesc);
+ Set<FlowNode> calleeReturnSet = calleeFlowGraph.getReturnNodeSet();
- // CompositeLocation baseLocation = null;
if (min.getExpression() != null) {
NodeTupleSet baseNodeSet = new NodeTupleSet();
analyzeFlowExpressionNode(md, nametable, min.getExpression(), baseNodeSet, null,
implicitFlowTupleSet, false);
- } else {
- if (min.getMethod().isStatic()) {
- // String globalLocId = ssjava.getMethodLattice(md).getGlobalLoc();
- // if (globalLocId == null) {
- // throw new
- // Error("Method lattice does not define global variable location at "
- // + generateErrorMessage(md.getClassDesc(), min));
- // }
- // baseLocation = new CompositeLocation(new Location(md,
- // globalLocId));
- } else {
- // 'this' var case
- // String thisLocId = ssjava.getMethodLattice(md).getThisLoc();
- // baseLocation = new CompositeLocation(new Location(md, thisLocId));
+ if (!min.getMethod().isStatic()) {
+ addArgIdxMap(min, 0, baseNodeSet);
+ // System.out.println("arg idx=0 argTupleSet=" + baseNodeSet);
+
+ for (Iterator iterator = calleeReturnSet.iterator(); iterator.hasNext();) {
+ FlowNode returnNode = (FlowNode) iterator.next();
+ NTuple<Descriptor> returnDescTuple = returnNode.getDescTuple();
+ if (returnDescTuple.startsWith(calleeMethodDesc.getThis())) {
+ // the location type of the return value is started with 'this'
+ // reference
+ for (Iterator<NTuple<Descriptor>> baseIter = baseNodeSet.iterator(); baseIter
+ .hasNext();) {
+ NTuple<Descriptor> baseTuple = baseIter.next();
+ NTuple<Descriptor> inFlowTuple = new NTuple<Descriptor>(baseTuple.getList());
+ inFlowTuple.addAll(returnDescTuple.subList(1, returnDescTuple.size()));
+ nodeSet.addTuple(inFlowTuple);
+ }
+ } else {
+ Set<FlowNode> inFlowSet = calleeFlowGraph.getIncomingFlowNodeSet(returnNode);
+ for (Iterator iterator2 = inFlowSet.iterator(); iterator2.hasNext();) {
+ FlowNode inFlowNode = (FlowNode) iterator2.next();
+ if (inFlowNode.getDescTuple().startsWith(calleeMethodDesc.getThis())) {
+ nodeSet.addTupleSet(baseNodeSet);
+ }
+ }
+ }
+ }
}
}
- // constraint case:
- // if (constraint != null) {
- // int compareResult =
- // CompositeLattice.compare(constraint, baseLocation, true,
- // generateErrorMessage(cd, min));
- // if (compareResult != ComparisonResult.GREATER) {
- // // if the current constraint is higher than method's THIS location
- // // no need to check constraints!
- // CompositeLocation calleeConstraint =
- // translateCallerLocToCalleeLoc(calleeMD, baseLocation, constraint);
- // // System.out.println("check method body for constraint:" + calleeMD +
- // // " calleeConstraint="
- // // + calleeConstraint);
- // checkMethodBody(calleeMD.getClassDesc(), calleeMD, calleeConstraint);
- // }
- // }
+ // analyze parameter flows
- analyzeFlowMethodParameters(md, nametable, min);
+ if (min.numArgs() > 0) {
- // checkCalleeConstraints(md, nametable, min, baseLocation, constraint);
+ int offset;
+ if (min.getMethod().isStatic()) {
+ offset = 0;
+ } else {
+ offset = 1;
+ }
- // checkCallerArgumentLocationConstraints(md, nametable, min,
- // baseLocation, constraint);
+ for (int i = 0; i < min.numArgs(); i++) {
+ ExpressionNode en = min.getArg(i);
+ int idx = i + offset;
+ NodeTupleSet argTupleSet = new NodeTupleSet();
+ analyzeFlowExpressionNode(calleeMethodDesc, nametable, en, argTupleSet, false);
+ // if argument is liternal node, argTuple is set to NULL.
+ addArgIdxMap(min, idx, argTupleSet);
+ // System.out.println("arg idx=" + (idx) + " argTupleSet=" +
+ // argTupleSet);
+ FlowNode paramNode = calleeFlowGraph.getParamFlowNode(idx);
+ if (hasInFlowTo(calleeFlowGraph, paramNode, calleeReturnSet)) {
+ addParamNodeFlowingToReturnValue(calleeMethodDesc, paramNode);
+ nodeSet.addTupleSet(argTupleSet);
+ }
+ }
- 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 =
- // computeCeilingLocationForCaller(md, nametable, min, baseLocation,
- // constraint);
- // return ceilingLoc;
}
+
}
- // return new CompositeLocation(Location.createTopLocation(md));
+ }
+ private boolean hasInFlowTo(FlowGraph fg, FlowNode inNode, Set<FlowNode> nodeSet) {
+ // return true if inNode has in-flows to nodeSet
+ Set<FlowNode> reachableSet = fg.getReachableFlowNodeSet(inNode);
+ for (Iterator iterator = reachableSet.iterator(); iterator.hasNext();) {
+ FlowNode fn = (FlowNode) iterator.next();
+ if (nodeSet.contains(fn)) {
+ return true;
+ }
+ }
+ return false;
}
- 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) {
+ MethodInvokeNode min, NodeTupleSet nodeSet) {
if (min.numArgs() > 0) {
offset = 0;
} else {
offset = 1;
- NTuple<Descriptor> thisArgTuple = new NTuple<Descriptor>();
- thisArgTuple.add(callermd.getThis());
- addArgIdxMap(min, 0, thisArgTuple);
+ // NTuple<Descriptor> thisArgTuple = new NTuple<Descriptor>();
+ // thisArgTuple.add(callermd.getThis());
+ // NodeTupleSet argTupleSet = new NodeTupleSet();
+ // argTupleSet.addTuple(thisArgTuple);
+ // addArgIdxMap(min, 0, argTupleSet);
+ // nodeSet.addTuple(thisArgTuple);
}
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);
+ System.out.println("arg idx=" + (i + offset) + " argTupleSet=" + argTupleSet);
+ nodeSet.addTupleSet(argTupleSet);
}
}
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();) {
nodeSet.addTupleSet(expNodeTupleSet);
nodeSet.addTupleSet(idxNodeTupleSet);
}
-
}
private void analyzeCreateObjectNode(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;
}
}
+ 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 (!left.getType().isPrimitive()) {
+ 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")) {
+ // array.length access, just have the location of the array
+ flowFieldTuple.add(fd);
+ nodeSet.removeTuple(base);
+ }
- if (fd.getSymbol().equals("length")) {
- // array.length access, just have the location of the array
- } else {
- base.add(fd);
}
+ 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();
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